Saugleitung und mehrere Saugleitungen innerhalb eines Mantels eines Flutverdampfers

Eine Saugleitung ist innerhalb des Mantels angeordnet und befindet sich relativ hoch und oberhalb des Rohrbündels, um keine Flüssigkeit oder Tröpfchen mitzureißen, die eventuell aufwärts spritzen und sprühen. Die Saugleitung ist mit einem Flächenaufteiler in Fluidkommunikation mit einem Flussweg innerhalb der Saugleitung konfiguriert. Der Flussweg ist in Fluidkommunikation mit einem Auslass des Mantels. Das ist im Vergleich zu Auslässen an Oberseiten des Mantels, die im Allgemeinen höhere vertikale Flächen haben, vorteilhaft. Der Flächenaufteiler der Saugleitung kann relativ gleichmäßigen Dampffluss innerhalb des Mantels erleichtern und/oder aufrechterhalten. Der Flächenaufteiler kann Dampfflüsse erzielen, die etwas Gleichförmigkeit entlang der Länge des Mantels haben, die lokalen Dampffluss und/oder lokale Ströme managen und/oder vermeiden können, wie zum Beispiel da, wo hohe Geschwindigkeit vorliegen kann und wo Mitreißen resultieren kann.

Steuerung vorübergehender Kältemittelmigration in Kältesystemen

Ein Behälter wird bereitgestellt, um Kältemittel aus einem ersten Wärmetauscher eines Wärmepumpensystems aufzunehmen, wenn das Wärmepumpensystem von einem Kühl- oder Enteisungsbetrieb zu einem Heizbetrieb umschaltet. Der Behälter ist fluidtechnisch zwischen dem ersten Wärmetauscher und einem zweiten Wärmetauscher des Wärmepumpensystems angeordnet. Das vom ersten Wärmetauscher zum Behälter fließende Kältemittel wird durch einen Druckunterschied zwischen einer Auslassöffnung des ersten Wärmetauschers und einem Einlass des Behälters angetrieben.

AIR FILTRATION SYSTEM

An air filtration system includable in and for HVAC equipment includes one or more intense field dielectric filter units and a field charging unit retained in a support structure or cabinet by a removable door which includes control circuitry and contactors engageable with corresponding contact members on a filter unit and the field charging unit for supplying high voltage DC potential to the respective units . Each filter unit includes a filter core comprising a stacked array of filter elements formed of dielectric sheets interconnected by elongated spaced apart ribs forming flow passages. The field charging unit and the filter units are removable from the support or cabinet for cleaning or replacement by opening or removing the door. An interlock switch and a field shorting mechanism are actuated during servicing or replacement of the system components.

BUILDING AUTOMATION SYSTEM FACILITATING USER CUSTOMIZATION

... ²²²Systems and methods for interacting with and customizing a dynamically ²extensible and automatically configurable building automation system (BAS). In ²one embodiment, a graphical user interface (GUI) of the BAS comprises a ²building summary pages. The invention is also directed to a space summary page ²and an equipment summary page.² ...

VARIABLE CAPACITY SCREW COMPRESSOR AND METHOD

A variable capacity screw compressor comprises a suction port, at least two screw rotors and a discharge port being configured in relation to a selected rotational speed that operates at least one screw rotor at an optimum peripheral velocity that is independent of a peripheral velocity of the at least one screw rotor at a synchronous motor rotational speed for a rated screw compressor capacity. A motor is configured to drive the at least one screw rotor at a rotational speed at a full-load capacity that is substantially greater than the synchronous motor rotational speed at the rated screw compressor capacity. A variable speed drive receives a command signal from a controller and generates a control signal that drives the motor at the selected rotational speed. A method for sizing at least two variable capacity screw compressors and a refrigeration chiller incorporating a variable capacity screw compressor are separately presented.

Refrigerant recovery and repurposing

A method of converting a refrigerant includes recovering a refrigerant from a refrigeration unit with an evacuation pump and containing the recovered refrigerant in a container. The method also includes testing the recovered refrigerant and converting the recovered refrigerant. The converted refrigerant is different from the recovered refrigerant. A system for converting a refrigerant includes an evacuation pump, a container, and one or more refrigerant containers. The evacuation pump and container are configured to recover a refrigerant from a refrigeration unit. The one or more containers deliver one or more refrigerant components into the container to convert the recovered refrigerant.

Retrofitting R410A HVAC products to handle flammable refrigerants

A system and method of retrofitting a heating, ventilation, air conditioning, and refrigeration system (HVACR) including one or more brazed, soldered, or mechanical connections between refrigerant lines is disclosed. The method includes removing a refrigerant from the HVACR system. The refrigerant that is removed is a non-flammable refrigerant. An enclosure is installed over the one or more brazed, soldered, or mechanical connections between refrigerant lines. A refrigerant is added to the HVACR system. The refrigerant being added has a global warming potential (GWP) that is relatively lower than the refrigerant removed from the HVACR system. The refrigerant being added has a relatively higher flammability than the refrigerant removed from the HVACR system.

EXPANSION VALVE CONTROL SYSTEM AND METHOD FOR AIR CONDITIONING APPARATUS

A method of reducing a cyclical loss coefficient of an HVAC system efficiency rating of an HVAC system includes operating the HVAC system using a recorded electronic expansion valve position of an electronic expansion valve of the HVAC system, discontinuing operation of the HVAC system, and resuming operation of the HVAC system using an electronic expansion valve position that allows greater refrigerant mass flow through the expansion valve as compared to the recorded electronic expansion valve position. 1. A method of reducing a cyclical loss coefficient of an HVAC system efficiency rating of an HVAC system , comprising:operating the HVAC system using a recorded electronic expansion valve position of an electronic expansion valve of the HVAC system;discontinuing operation of the HVAC system; andresuming operation of the HVAC system using an electronic expansion valve position that allows greater refrigerant mass flow through the expansion valve as compared to the recorded electronic expansion valve position.2. The method of claim 1 , the operating the HVAC system using the electronic expansion valve position that allows greater refrigerant mass flow through the expansion valve comprising:at least partially flooding a compressor of the HVAC system.3. The method of claim 2 , the flooding occurring for about five minutes or less.4. The method of claim 2 , further comprising:operating the HVAC system at a recorded evaporator temperature while operating the HVAC system using a recorded electronic expansion valve position of an electronic expansion valve of the HVAC system.5. The method of claim 4 , further comprising:after resuming operation of the HVAC system using an electronic expansion valve position that allows greater refrigerant mass flow through the expansion valve as compared to the recorded electronic expansion valve position, operating the electronic expansion valve in response to a measured evaporator temperature measured after resuming operation of the HVAC ...

Heat exchanger having U-shaped tube arrangement and staggered bent array for enhanced airflow

Systems, apparatuses, and methods described herein are directed to a heat exchange tube structure and an arrangement of heat exchange tubes that enhance or help promote fluid flow through a heat exchanger. Bend portions of heat exchange tubes may be structured and configured to allow for gaps so that fluid may pass an assembly of the heat exchange tubes. The heat exchange tubes may be arranged to expose the air gaps at the bend portions of the heat exchange tubes to promote fluid flow.

CENTRIFUGAL COMPRESSOR ASSEMBLY AND METHOD

A centrifugal compressor assembly (24) for compressing refrigerant in a 250-ton capacity or larger chiller system (20), the centrifugal compressor assembly comprising a mixed flow impeller (56, 58) and a vaneless diffuser (112) sized such that a final stage compressor (28) operates with an optimal specific speed range for targeted combinations of head and capacity, while a non-final stage compressor (26) operates above the optimum specific speed of the final stage compressor.

VARIABLE FREQUENCY CHARGE PUMP IN CAPACITIVE LEVEL SENSOR

A method of determining a fluid or material level. The method comprises the steps of : providing, at a first frequency, a current operatively capable of changing a capacitor; charging at least first and second capacitive devices to a predetermined voltage using the provided current; measuring the amount of current respectively necessary to charge the first and second capacitive devices to the predetermined voltage; determining a liquid level based on the measured signals from charging the first and second capacitive devices; and varying the first frequency.

SYSTEM AND METHOD FOR REDUCING COMPRESSOR NOISE

A noise reduced compressor has a body, an energy dissipation element, and a structural element configured to retain the energy dissipation element relative to the body. A noise reducer for an HVAC system compressor has an energy dissipation element and a structural element connected to the energy dissipation element. A method of reducing compressor noise includes disposing an energy dissipation element between a body of the compressor and a structural element and compressing the energy dissipation element against between the body of the compressor using the structural element.

FC FAN FLOW MEASUREMENT SYSTEM

An airflow volume sensing means for determining the flow rate through a fan includes a curved inlet cone with a pressure sensor at the minimum diameter of the cone, wherein the flow volume sensing means is particularly suited for FC centrifugal fans (centrifugal fans with forward curved fan blades). With an FC fan, the minimum diameter of the inlet cone's interior surface is adjacent the fan wheel, and the static pressure there is at a minimum value. A predetermined relationship between the static gage pressure at that point and the volume flow rate through the fan is applied regardless of variables such as fan speed, fan housing geometry, supply air duct configurations, return air duct configurations, location of various heat exchangers or filters, etc. In some embodiments, a single pressure sensor senses an average of a plurality of pressure taps, wherein each tap is at approximately the same minimum pressure.

Blower Assembly

An air handling unit has a blower assembly, a first interior zone, and a second interior zone and the blower assembly physically separates the first interior zone from the second interior zone. A method includes providing a cabinet configured to receive a blower assembly, inserting a blower assembly into the air duct, and closing a cabinet door of the cabinet, wherein upon closing the cabinet door, the primary air flow path from a location within the cabinet downstream of the blower assembly to a location within the cabinet upstream of the blower assembly is through a blower housing of the blower assembly. A blower assembly has a blower housing comprising at least one air inlet and at least one air outlet and a blower deck extending from the outlet, wherein the blower deck comprises at least one substantially flat component having a substantially orthogonal wall extending from the flat component. 1. An air handling unit , comprising:a blower assembly;a first interior zone; anda second interior zone;wherein the blower assembly physically separates the first interior zone from the second interior zone.2. The air handling unit of claim 1 , wherein the first interior zone is associated with an input to a blower housing of the blower assembly.3. The air handling unit of claim 2 , wherein the second interior zone is associated with a blower output of the blower housing.4. The air handling unit of claim 3 , wherein a pressure differential between the first interior zone and the second interior zone is primarily attributable to a zone boundary between the first interior zone and the second interior zone provided by a blower deck of the blower assembly.5. The air handling unit of claim 4 , wherein the blower deck is formed integrally with the blower housing and wherein the blower housing houses at least a portion of a motor of the blower assembly and an impeller of the blower assembly.6. The air handling unit of claim 4 , wherein substantially the entire zone boundary is ...

Valve cap with integral seal

A valve cap (14) can be configured to have an integral sealing member (50) at least part of which is extendable into an opening(18) of a valve body (12) and seals against an inner surface of a valve body wall (16). The sealing member (50) is configured to have a void space (51) such that when fluid leaks from a valve stem disposed in the valve body (12), an internal pressure in the void space forces a surface of the sealing member (50) against the inner surface of the valve body wall (16), thereby tightening a seal between the sealing member (50) and the valve body wall (16). In such circumstances, the fluid is prevented effectively from exiting the valve cap (14).

Wet or dry condensate traps for heating and cooling

A condensate trap for an air handling unit is provided. The condensate trap includes at least one channel configured to selectively receive condensation flowing from the air handling unit, a drain outlet configured to selectively discharge condensation from the at least one channel, and a sealing device configured to float above condensation flowing from the least one channel to the drain outlet. The sealing device is further configured to sit atop a bottom surface of the at least one channel such that a seal is created when the at least one channel does not contain condensation, and to prevent a flow of contaminated air from the drain outlet to the air handler without completely blocking airflow from the sealing device to the air handler.

Phobic/philic structures in refrigeration systems and liquid vapor separation in refrigeration systems

Oleophobic and/or philic surface(s) are utilized for oil separation, direction, and/or collection in a refrigeration system. Surfaces of component(s) of a refrigeration system (compressor, oil separator, evaporator, etc.) are produced to be oleophobic or philic. The oleophobic and/or philic surfaces are utilized to direct a flow path of oil within the refrigeration system or to prevent oil connection in an area. Refrigerant phobic and/or lubricant phobic material(s) also may be utilized to help promote separation of refrigerant vapor from refrigerant liquid and/or from oil in refrigeration systems.

Refrigerant distributor of micro-channel heat exchanger

Embodiments of a refrigerant distributor for a micro-channel heat exchanger (MCHEX) are described. The refrigerant distributor may be configured to have orifices and/or a flow valve that are inside a header of the MCHEX. The MCHEX can be used as an evaporator in a cooling cycle, where refrigerant is distributed into the header(s) through the orifices and the flow valve may be generally in a closed state that generally prevents a refrigerant flow through the flow valve. In a heating cycle, the flow valve of the refrigerant distributor may be configured to be in an open state that allows the refrigerant to flow into the refrigerant distributor and to be directed out of the MCHEX through the refrigerant distributor. In some embodiments, the refrigerant distributor may be configured to receive liquid refrigerant, so as to eliminate the need of an expansion valve in a HVAC system.

SYSTEM AND METHOD FOR REAL COST ANALYSIS OF A COOLING SYSTEM

A system and a method for calculating in real time, actual realized savings that a cooling system obtains from addition of a thermal storage capability to the cooling system, compared to a model of the system without the added thermal storage capability. 1. A computerized method for real cost analysis related to a modification of an existing cooling system , comprising:a computer processor determining a base real cost per time period of the existing cooling system;the computer processor generating an estimated real cost per time period of a model using the modification to the existing cooling system; andthe computer processor comparing the base real cost per time period to the estimated real cost per time period.2. The computerized method according to claim 1 , wherein the computer processor determining the base real cost per time period of the existing cooling system comprises:determining values for a temperature, a flow measurement, a fluid type in a solution, and a fluid percentage in the solution.3. The computerized method according to claim 1 , wherein the computer processor determining the base real cost per time period of the existing cooling system comprises:the processor determining a chiller leaving temperature, and an entering condenser temperature.4. The computerized method according to claim 3 , wherein the entering condenser temperature includes an entering air temperature.5. The computerized method according to claim 3 , wherein the entering condenser temperature includes a water temperature.6. The computerized method according to claim 1 , further comprising the computer processor determining heat per unit time.7. The computerized method according to claim 1 , wherein the computer processor generating the estimated real cost per time period of the model comprises:the processor using the values for the temperature, the flow measurement, the fluid type in the solution, and the fluid percentage in the solution.8. The computerized method according to ...

Intermediate oil separator for improved performance in a scroll compressor

An oil lubrication system for a multi-stage compressor separates oil from a refrigerant at an intermediate pressure following the first stage of compression and then routes the separated oil at the intermediate pressure to the compressor suction cavity bearings at the intermediate pressure, thus avoiding further compression of oil in subsequent stages of compression. The efficiency of the multi-stage compressor can be increased by not raising the pressure of the oil through the subsequent stages of compression.

Variable Gebläsegeschwindigkeitssteuerung in HVAC-Systemen und -Verfahren

Im Allgemeinen wird eine variable Gebläsegeschwindigkeitssteuerung in einem HVAC-System beschrieben. Solche Verfahren und Systeme zur Steuerung von Gebläsegeschwindigkeiten können wiederum die Effizienz des HVAC-Systems verbessern, indem die Leistungsaufnahme, beispielsweise des Verdichters, minimiert wird. Das Steuerungsschema basiert auf verschiedenen Betriebsbedingungen der Verdichterlast und der Umgebungslufttemperatur, die verwendet werden, um eine optimale Gebläsegeschwindkeit zu bestimmen.

Tragbare Testvorrichtung für den praktischen Einsatz zum schnellen Erfassen von Schmiermittel- oder Kühlmitteladditiven

Tragbare Testvorrichtung für den praktischen Einsatz zum Erfassen eines Additivs in einem Kühlmittel, einem Schmiermittel oder einem Kühlmittel- und Schmiermittelgemisch im praktischen Einsatz, wobei die Testvorrichtung für den praktischen Einsatz Folgendes umfasst:ein Gefäß, das konfiguriert ist, um das Kühlmittel, Schmiermittel oder Kühlmittel- und Schmiermittelgemisch zu halten, undein reaktives Medium, das auf das Additiv in dem Kühlmittel, Schmiermittel oder Schmiermittel- und Kühlmittelgemisch reagiert, um ein Produkt zu bilden, wobei sich eine Farbe des Produkts von einer Farbe des reaktiven Mediums unterscheidet, wobei das reaktive Medium konfiguriert ist, um mit dem Kühlmittel, Schmiermittel oder Schmiermittel- und Kühlmittelgemisch gemischt zu werden, um ein reaktives Gemisch zu erzeugen, und eine Farbe des reaktiven Gemischs konfiguriert ist, um einer Konzentration des Additivs in dem Kühlmittel, Schmiermittel oder Kühlmittel- und Schmiermittelgemisch zu entsprechen,wobei die ...

BUILDING AUTOMATION SYSTEM DATA MANAGEMENT

A building automation system (BAS). In one embodiment, the BAS comprises a database and a relational directory. The database is adapted to store data definitions. The relational directory includes data definitions for the BAS, stored in the database, and includes a site level, a system level, a device level, and an extension level organized in a hierarchical relationship in the database. In another embodiment, the BAS comprises a database, a relational directory of data definitions for the BAS, and a server engine.

ELECTROSTATIC AIR FILTRATION SYSTEM

An intense field dielectric air filtration system includes a perimeter frame for wall or ceiling mounting at the inlet of a return air duct for an air conditioning apparatus. A door including a grille disposed thereon is mounted for movement on the frame between working and non- working positions for access to an air filter unit, a pre--filter unit and an intense field particle charging unit. Contacts on the filter unit and the field charging unit engage cooperating contacts on an enclosure mounted on the frame when the door is closed to supply electrical power. An interlock is provided to interrupt power when the door is moved to an open position or the grille is removed. A control system disposed in the enclosure includes user control features accessible when the door is in an open position. An alternate embodiment includes a support frame for positioning the filtration system in ductwork or the like other than a return air inlet.

SCROLL COMPRESSOR WITH BIFURCATED FLOW PATTERN

A scroll compressor includes various features that promote a bifurcated flow pattern of gas through a compressor shell to reduce oil entrainment. After entering the shell, some gas travels upward, which reduces the volume of gas traveling downward toward an oil sump. To accomplish this, the compressor's motor can be surrounded by a sleeve having upper and lower apertures for directing the flow to the motor's upper and lower stator end turns. In some embodiments, a suction inlet is strategically positioned relative to two gas passageways that are between the stator and the compressor shell. The inlet's position is such that one passageway receives incoming gas and divides the flow in opposite directions: upward and downward. The other passageway only conveys the gas upward. In addition, a suction baffle, a diffuser, a streamlined counterweight and/or a suction line oil trap can also help promote gas/oil separation or minimize oil entrainment.

CONDENSING UNIT DESUPERHEATER

A condensing unit has a fan selectively operable to draw air through the condensing unit along an airflow path, a first row of condenser tubes disposed along the airflow path, and a second row of desuperheater tubes disposed along the airflow path downstream relative to the first row of condenser tubes. A condensing unit has an airflow path, a desuperheater heat exchanger disposed along the airflow path, and a condenser heat exchanger disposed along the airflow path. A method of desuperheating a refrigerant includes causing air having a first air temperature to encounter a condenser tube comprising refrigerant having a first refrigerant temperature, raising the temperature of the air to a second air temperature, and causing the air having the second air temperature to encounter a desuperheater tube comprising refrigerant having a second refrigerant temperature higher than the first refrigerant temperature.

SUCTION DUCT AND DOUBLE SUCTION DUCT FOR A SUBMERGED EVAPORATOR

Furnace viewing window

Blower housing

A blower housing has a discharge direction, an axis of rotation, a polar axis that intersects the axis of rotation and is substantially perpendicular to the discharge direction, and an angular sweep of increasing fluid flow area. The fluid flow area, A, increases with increasing angular magnitude, , as a function comprising at least a functional component that is at least one of (1) equal to, (2) substantially mathematically reducible to, and (3) substantially mathematically analogous to the equation, A ⁡ ( ) = A co + R ( 1 - 1 - [ ( r i ) ⁢ ( ) R ] 2 ) , where Aco is a minimum fluid flow area, R is a radius of a first circle, and ri is a radius of a second circle that is smaller than the first circle.

Terminal assembly for refrigeration compressor

A terminal assembly configured to conduct current from an external power source to a hermetical motor-compressor unit. The terminal assembly includes a terminal board, at least one opening defined through the thickness of the terminal board, at least a conductive pin received in the opening, and an insulator having a convoluted contour. The insulator may be disposed over the conductive pin and spaced away from the terminal board.

Refrigerant gas cooling of motor and magnetic bearings

A variable orifice flow device controls the flow of refrigerant into a compressor motor housing in a compressor. The variable orifice flow device may include, for example, an electronic expansion valve, a thermal expansion valve, or a shuttling valve controlling the flow of refrigerant into a compressor motor housing. One or more flows of refrigerant may be through a fixed orifice, a valve seat of the variable orifice flow device, or leakage through a seal of the compressor motor housing, providing a baseline refrigerant flow to the inside of the compressor motor housing in addition to the flow through the variable orifice flow device.

HEAT EXCHANGER

A heat exchanger has a first fin having a hole, a collar attached to the first fin and associated with the hole, and a bluff body carried by the first fin. The bluff body is partially directly upstream of the collar. A heat exchanger has a fin having a hole, a collar attached to the fin and associated with the hole, and a bluff body associated with the fin. A configuration of the bluff body is associated with a fin pitch separation distance of the heat exchanger. A method of increasing a heat exchange efficiency of a heat exchanger is provided that includes passing an air flow adjacent a surface of a fin, obstructing the air flow with a bluff body, reducing a thickness of a thermal boundary layer, and locating a reduced thickness portion of the thermal boundary layer adjacent to a collar associated with the fin.

SYSTEM AND METHOD FOR CHARGING HVAC SYSTEM

A method of charging an HVAC system by determining a relationship between a liquid line temperature of the HVAC system, a suction line pressure of the HVAC system, and an ambient outdoor temperature of the HVAC system. A method of charging an HVAC system by adjusting a mass of refrigerant in the HVAC system to approach a target minimum liquid line temperature. A method of charging an HVAC system by testing the HVAC system according to at least three sets of test parameters, two of the three sets of test parameters comprising testing the HVAC system at substantially a same outdoor ambient temperature and at least one of the remaining set of test parameters comprising testing the HVAC system at a different outdoor ambient temperature.

SYSTEM AND METHOD FOR HEATING VENTILATION AND AIR CONDITIONING COMPONENT DETECTION

A method for detecting heating, ventilation, and air conditioning (hdac) components is provided. The method includes the steps of measuring an initial current at a current sensor in a circuit, while a relay is de-energized; energizing the relay; measuring, at a periodic interval, an energized current while the relay is energized; incrementing a counter if an absolute difference between a first voltage related to the energized current and a second voltage related to the initial current is above a threshold; and determining a HVAC component is present if the counter exceeds a pre-determined value during a pre-determined time period.

Control system and method for multistage air conditioning system

A controller and method for operating an HVAC system including an air conditioning unit, such as a gas furnace, having three stages of heat output and responsive to signals from a single stage or two stage thermostat. The W 1 , W 2 , and W 3 inputs to the controller may be configured for receipt of a single stage control signal simultaneously or paired as W 1 , W 2 or W 2 , W 3 . The system controller is configured to determine which input connection arrangement is in existence and operates the system in mock one stage or mock two stage modes depending on the signals received from a single or two stage thermostat, respectively.

Microchannel heat exchanger with an inward gas/liquid distribution structure

An inward gas/liquid distribution structure used in microchannel heat exchangers is disclosed. The inward gas/liquid distribution structure can help optimizing refrigerant distribution for a microchannel heat exchanger with long distribution pipe or a microchannel heat exchanger having significant wind field differences. The inward gas/liquid distribution structure includes an inlet header component. The inlet header component has n inlets that are configured to allow gas/liquid to enter the inlet header component, and “n” is an integer that is greater than or equal to 2. The inward gas/liquid distribution structure also includes m distribution components. The m distribution components are located in the inlet header component and connected to the n inlets, respectively. In an example, the number m equals to the number n.

Refrigerant compositions and methods of use

Compositions and methods are configured to reduce flammability in a heating, ventilation, and air conditioning (HVAC) system having R32 refrigerant included in the refrigerant composition. Refrigerant compositions and methods can be used for retrofitting, servicing, controlling flammability, improving performance, lubricant solubility and miscibility, and improving the safety of an HVAC system.

Blower Housing

A blower housing has a discharge direction, an axis of rotation, a polar axis that intersects the axis of rotation and is substantially perpendicular to the discharge direction, an angular sweep of increasing fluid flow area, and an axial contraction located at an angularly greater value than the angular sweep. 1. A blower housing , comprising:a discharge direction;an axis of rotation;a polar axis that intersects the axis of rotation and is substantially perpendicular to the discharge direction;an angular sweep of increasing fluid flow area; andan axial contraction located at an angularly greater value than the angular sweep.2. The blower housing of claim 1 , wherein the angular sweep extends over about 300 degrees.3. The blower housing of claim 1 , wherein the angular sweep begins at about 90 degrees as measured from the polar axis.4. The blower housing of claim 1 , wherein the angular sweep ends at about 365 degrees as measured from the polar axis.5. The blower housing of claim 1 , wherein the fluid flow area comprises a cross-sectional area measured between the axis of rotation and an inner wall of the blower housing.6. The blower housing of claim 1 , wherein the fluid flow area is increased by increasing a distance between the axis of rotation and a radial wall of the blower housing.7. The blower housing of claim 1 , wherein the fluid flow area is increased by axially expanding a sidewall of the blower housing.8. The blower housing of claim 1 , wherein the axial contraction extends between the angular sweep and a discharge of the blower housing.9. The blower housing of claim 1 , wherein the axial contraction is joined to at least one of the angular sweep and a discharge of the blower housing.10. The blower housing of claim 1 , wherein the axial contraction is angularly separated from each of the angular sweep and a discharge of the blower housing.11. A method of moving air claim 1 , comprising:receiving air into a centrifugal blower;moving the air along an ...

Apparatuses, systems, and methods of variable frequency drive operation and control

An exemplary system includes a compressor, a condenser, an expander, and an evaporator fluidly coupled to form a vapor-compression circuit, and an electric motor configured to drive the compressor. An inverter having a plurality of switching elements is configured to provide an output voltage to the electric motor through operation of the switching elements. A waste heat recovery circuit is configured to transfer waste heat from the inverter to a load. A controller is configured provide switching commands to the switching elements of the inverter. The controller is further configured to sense a condition of the system, determine a heat production requirement based at least in part upon the system condition, and to vary the number of switching commands per unit time based at least in part upon the heat production requirement.

Backward curved plenum fan having enhanced efficiency

A centrifugal fan for use as a blower in a heating, ventilation, air conditioning, and refrigeration (HVACR) system has a plurality of blades each having a leading edge camber angle of at or about 10 degrees to at or about 30 degrees, a trailing edge camber angle of at or about 10 degrees to at or about 30 degrees, a stagger angle of at or about 35 degrees to at or about 55 degrees, and a chord having a length L, wherein the length L over the diameter of the centrifugal fan divided by the diameter D satisfies the inequality 0.25≤L/D≤0.42. The fan blades having these parameters provide improved fan efficiency at certain operating conditions. The fan blades may further have a forward or radial sweep. The fan blades may have a uniform thickness from the leading edge to the trailing edge.

Abweisende/aufnehmende Strukturen in Kühlsystemen und Flüssigdampfabscheidung in Kühlsystemen

Öl-abweisende und/oder Öl anziehende Fläche/n werden zum Abscheiden, Leiten und/oder Sammeln von Öl in einem Kühlsystem verwendet. Flächen von Komponente/n eines Kühlsystems (Kompressor, Ölabscheider, Verdampfer usw.) werden hergestellt, um Öl abweisend oder anziehend zu sein. Die Ölabweisenden und/oder anziehenden Flächen werden verwendet, um einen Strömungspfad von Öl in dem Kühlsystem zu leiten oder um eine Ölverbindung in einem Bereich zu verhindern. Kühlmittel abweisende/s und/oder Schmiermittel-abweisende/s Material/ien kann bzw. können außerdem verwendet werden, um dazu beizutragen, die Abscheidung von Kühlmitteldampf aus Kühlmittelflüssigkeit und/oder aus Öl in Kühlsystemen zu fördern.

Kältemittel-Leckagedetektion durch Verwendung eines Fluidadditivs

Kältemittel-Detektionssystem, umfassend:einen Kältemittelkreislauf;ein Arbeitsfluid, das den Kältemittelkreislauf durchströmt;ein Additiv, das außerhalb des Kältemittelkreislaufs detektierbar ist, wobei das Additiv zusätzlich zu dem Arbeitsfluid ein Fluid in dem Kältemittelkreislauf ist; undeine Detektionseinrichtung um basierend auf dem Detektieren eines plötzlichen Anstiegs einer Additivkonzentration außerhalb des Kältemittelkreislaufs zu bestimmen, dass das Arbeitsfluid aus dem Kältemittelkreislauf austritt.

Kompressor mit lasergehärteten Lagerflächen

Ein Kompressor, umfassend: ein Gehäuse mit einem festen Schneckenelement; ein umlaufendes Schneckenelement; und ein Drucklager, das zwischen dem Gehäuse und dem umlaufenden Schneckenelement in einer axialen Richtung des umlaufenden Schneckenelements angeordnet ist, wobei das Drucklager eine erste Schubplatte mit einer ersten Verschleißfläche und eine zweite Schubplatte mit einer zweiten Verschleißfläche, die der ersten Verschleißfläche entgegengesetzt ist, aufweist, und eine der Verschleißflächen eine lasergehärtete Schicht mit einer martensitischen Struktur aufweist, die der anderen Verschleißfläche entgegengesetzt ist.

Refrigerant management in a HVAC system

CENTRIFUGAL BLOWER FOR AIR HANDLING EQUIPMENT

An air handling blower for HVAC equipment includes a blower housing adapted to accommodate centrifugal impellers of selected inside and outside diameters of the impeller blades wherein the inside diameter of the largest diameter impeller accommodated by the housing is not less than the outside diameter of the smallest diameter impeller accommodated by the housing without loss of performance. The blower housing preferably has a continuously increasing cross- sectional airflow area for air being discharged from the blower and extending from a cutoff edge to an outlet.

BUILDING AUTOMATION SYSTEM DATA MANAGEMENT

... ²²²A building automation system (BAS). In one embodiment, the BAS comprises a ²database and a relational directory. The database is adapted to store data ²definitions. The relational directory includes data definitions for the BAS, ²stored in the database, and includes a site level, a system level, a device ²level, and an extension level organized in a hierarchical relationship in the ²database. In another embodiment, the BAS comprises a database, a relational ²directory of data definitions for the BAS, and a server engine.² ...

LUBRICANT CONTROL VALVE FOR A SCREW COMPRESSOR

A compressor system includes a lubricant reservoir, a screw compressor, and a valve. The screw compressor includes a housing defining a compression chamber having a suction port, a discharge port, a first lubricant feed port located between the suction port and the discharge port, and a second lubricant feed port located between the discharge port and the first lubricant feed port. The valve is in fluid communication with the lubricant reservoir, the first lubricant feed port via a first lubricant feed passageway, and the second lubricant feed port via a second lubricant feed passageway. The valve is movable between a first position and a second position. In the first position, the valve fluidly connects the lubricant reservoir to the first lubricant feed passageway to direct lubricant to the first lubricant feed port. In the second position, the valve fluidly connects the lubricant reservoir to the second lubricant feed passageway to direct lubricant to the second lubricant feed port.

HVAC SYSTEM WITH MULTIPURPOSE CABINET FOR AUXILIARY HEAT TRANSFER COMPONENTS

An HVAC system having an airflow path, a primary heat exchanger disposed along the airflow path, wherein the airflow path at least partially passes through the primary heat exchanger, and a multipurpose cabinet selectively configurable between at least a first configuration for housing a first type of auxiliary heat transfer component and a second configuration for housing a second type of auxiliary heat transfer component, wherein the airflow path at least partially passes through the multipurpose cabinet.

DYNAMICALLY EXTENSIBLE AND AUTOMATICALLY CONFIGURABLE BUILDING AUTOMATION SYSTEM AND ARCHITECTURE

... ²²²A building automation system (BAS) architecture is disclosed. The BAS ²comprises, in one embodiment, an architecture comprising a communication ²network and having a dynamic extensibility capability and an automatic ²configuration capability; an engine communicatively coupled to the ²communication network; and at least one control device communicatively coupled ²to the communication network, the control device being known or unknown to the ²engine. The engine can be adapted to selectively implement the dynamic ²extensibility capability to establish communications with and to control both ²known and unknown control devices. The engine can be further adapted to ²selectively implement the automatic configuration capability to determine at ²least one characteristic of both known and unknown control devices. A method ²of adding a control device to a building automation system (BAS) by ²dynamically extending and automatically configuring an architecture of the BAS ²is also disclosed.² ...

AIR CONDITIONING APPARATUS WITH INTEGRATED AIR FILTRATION SYSTEM

An air conditioning apparatus includes a cabinet having air inlet and outlet openings and an intense field dielectric air filtration system disposed in the cabinet between the inlet and outlet openings. The filtration system includes a field charging unit and a filter unit. The filter unit may be mounted for removal from the cabinet on spaced apart support brackets connected to the cabinet or to a frame of the field charging unit. Electrical contact elements may be supported by the support brackets for engagement with corresponding contact elements on the filter unit and charging unit for establishing electrical communication between a power supply and the charging unit and filter unit, respectively. A shorting bar is aligned with the contact members on the filter unit for discharging high voltage potential upon removal of the filter unit from the cabinet.

REFRIGERANT REHEAT CIRCUIT AND CHARGE CONTROL

A refrigerant system for cooling a comfort zone is selectively operable in a cooling-only mode and a reheat mode. The system operates in the cooling mode to meet sensible and latent cooling demands of a room or area in a building when the room temperature is appreciably above a target temperature. The ~reheat mode is for addressing the latent cooling or dehumidifying demand when the room temperature is near or below the target temperature. In some embodiments, a generally inactive condenser (16) stores excess refrigerant during the reheat mode, thereby avoiding the need for a separate liquid refrigerant receiver. To maintain a desired level of subcooling in the reheat coil (20), refrigerant can be transferred accordingly between the inactive condenser (16) and the reheat coil (20'). In some embodiments, the system's evaporator (18) and reheat coil '(2O)' can be connected in a series or parallel flow relationship." ...

GAS TRAP DISTRIBUTOR FOR AN EVAPORATOR

A shell -and- tube evaporator of a refrigerant system includes a refrigerant inlet distributor that traps a pocket of gaseous refrigerant to displace liquid refrigerant underneath the evaporator's tube bundle, thereby reducing the total charge of refrigerant in the evaporator. In some embodiments, the distributor comprises four sections interconnected by a central refrigerant feed line, which properly apportions the refrigerant to the four sections.

Cascading heat recovery using a cooling unit as a source

A cascade heat recovery system connects an evaporator from a heating unit to a recovery condenser of the cooling unit, where the recovery condenser is different from a cooling condenser of the cooling unit, and/or connects the evaporator of the heating unit to the cooling loop of the cooling unit, for example in fluid communication with the evaporator of the cooling unit. Both configurations allow the heating unit to be isolated or decoupled from the heat rejection circuit on which the cooling condenser runs. The use of either or both configurations, depending on the operating conditions, can use heat rejected by the evaporator of the cooling unit to be available to the heating unit, so as to provide lift to the heating unit and improve its operating efficiency.

Secondary inlet cone for a plenum fan

A plenum fan comprising a fan wheel disposed within a box-like enclosure includes a secondary inlet cone, a primary inlet cone, and a flexible duct. The two inlet cones convey air to the mouth of the fan wheel. A frame supports the fan wheel and the primary inlet cone such that the frame, the fan wheel and the primary inlet cone comprise a fan assembly. If the fan assembly shifts due to fan thrust or vibration, the fan assembly moves as a unit. The flexible duct connects the primary inlet cone to an inlet of the enclosure while isolating the fan assembly's vibration from the enclosure. The secondary inlet cone extends from the inlet of the enclosure, protrudes into or toward the primary inlet cone and provides a smooth airflow path over the abrupt shape of the flexible duct.

System and method for controlling indoor air flow for heating, ventilating and air conditioning equipment

An HVAC system includes a variable speed electric motor driven fan for circulating air to an enclosed space through an indoor unit for providing heating or cooling effect to air circulated through the indoor unit. A controller with user or system installer actuatable switches includes a programmable microcontroller providing a pulse width modulated (PWM) signal to a motor control unit to select a predetermined air flowrate less than full air flowrate during system startup and shutdown. User input parameters include selected percentages of full air flowrate to satisfy requirements for reduced noise level, lower humidity and for improved sensible heating of air being circulated, the latter being effective particularly for heat pump applications. Selection of pre-run, short run and shutdown cycles may be provided.

Systems and methods for controlling free cooling and integrated free cooling

Chiller control systems and methods for chiller control use iterative modeling of cooling towers, heat exchangers, and pumps to determine the feasibility of integrated free cooling and the ability to take advantage of free cooling. The control systems and control methods can further include selecting the parameters for operating in the free cooling or integrated free cooling mode to improve efficiency and/or reduce energy consumption when operating in these modes. The models can have inputs and outputs that feed into one another, and converge at a solution over multiple iterations. The feasibility of integrated free cooling can be based on providing cooling to a cooling load process fluid at a heat exchanger. The availability of free cooling can be based on the cooling provided at the heat exchanger achieving a target temperature for the cooling load process fluid.

SCROLL COMPRESSOR WITH BIFURCATED FLOW PATTERN

A scroll compressor includes various features that promote a bifurcated flow pattern of gas through a compressor shell to reduce oil entrainment. After entering the shell, some gas travels upward, which reduces the volume of gas traveling downward toward an oil sump. To accomplish this, the compressor's motor can be surrounded by a sleeve having upper and lower apertures for directing the flow to the motor's upper and lower stator end turns. In some embodiments, a suction inlet is strategically positioned relative to two gas passageways that are between the stator and the compressor shell. The inlet's position is such that one passageway receives incoming gas and divides the flow in opposite directions: upward and downward. The other passageway only conveys the gas upward. In addition, a suction baffle, a diffuser, a streamlined counterweight and/or a suction line oil trap can also help promote gas/oil separation or minimize oil entrainment.

OIL-FREE LIQUID CHILLER

A refrigeration chiller employs a centrifugal compressor the impellers of which are mounted on a shaft which it itself mounted for rotation using rolling element bearings lubricated only by the refrigerant which constitutes the working fluid of the chiller system. Apparatus is taught for providing liquid refrigerant to the bearings immediately upon chiller start-up, during chiller operation and during a coastdown period subsequent to shut down of the chiller and the driver motor of the chiller's compressor for motor cooling purposes. By use of a variable speed-driven motor to drive the compressor, optimized part load chiller performance is achieved in a chiller which does not require or employ an oil-based lubrification system.

ELECTRONIC CONTROLLED EXPANSION VALVE

A method of controlling an expansion valve (16) including the steps of: measuring a primary system condition; determining an error in the primary system condition; measuring a secondary system condition; determining an error in the secondary system condition; and modulating the expansion valve (16) based upon the smaller of the first or second error.

GAS FUELLED RADIALLY AND AXIALLY FED PERFORATED CAVITY BURNER

A gas-fired air conditioning furnace has a cavity burner configured to combust an air-fuel mixture at least partially within an interior space of the cavity burner. A method of operating a gas-fired furnace by flowing an air-fuel mixture into a cavity burner through a perforated wall of the cavity burner, combusting at least a portion of the air- fuel mixture within an interior space of the cavity burner, and flowing at least partially combusted air-fuel mixture into a heat exchanger. A gas-fired air conditioning device has a cavity burner that has a cylindrically shaped body and a cap on a first end of the body, each of the body and the cap being perforated. The device has a cylindrically shaped heat exchanger inlet tube and the cavity burner is at least partially concentrically received within the heat exchanger inlet tube.

SCREW COMPRESSOR DRIVE CONTROL

An embodiment of method used to control operation of a screw compressor of a refrigeration system may include receiving status signals regarding operation of the screw compressor of the refrigeration system. The method may further include determining an operating point of the screw compressor based upon the received status signals, and selecting a torque profile for the screw compressor based upon the operating point. The method may also include driving the screw compressor per the selected torque profile. Refrigeration systems and compressor systems suitable for implementing the method are also presented.

METHOD OF ADAPTIVE CONTROL OF A BYPASS DAMPER IN A ZONED HVAC SYSTEM

A zoned HVAC system comprises an HVAC unit including a climate control system and an air mover. In addition, the system comprises a supply air duct in fluid communication with the outlet of the HVAC unit. Further, the system comprises a return air duct in fluid communication with the inlet of the HVAC unit. Still further, the system comprises a plurality of zones positioned between the supply air duct and the return air duct. Moreover, the system comprises a bypass duct extending between the supply air duct and the return air duct. The bypass duct includes an active bypass damper having an open position, a closed position, and a plurality of partially opened positions. The system also comprises a control device configured to control the position of the bypass duct.

Return waterbox for heat exchanger

A return waterbox for a heat exchanger, such as a shell-and-tube heat exchanger, is provided. The return waterbox may include an insert configured to direct a fluid flow(s) in the return waterbox. In some embodiments, such as in a two-pass heat exchanger, the insert can be configured to receive water from one portion of the heat exchanger tubes in the first pass and redirect the received water to another portion of the heat exchanger tubes in the second pass.

Reverse rotation braking for a PM motor

A system includes a motor, an inverter bridge, a voltage detection circuit, and a controller. The motor has a stator and a rotor. The inverter bridge is configured to provide a voltage to the stator, and includes a first switch connected in a series-type relationship with a second switch, a first diode coupled across the first switch, and a second diode coupled across the second switch. The voltage detection circuit is configured to detect a back EMF voltage in the winding. The controller is configured to control the first switch and the second switch to drive the motor, and to receive an indication of the back EMF voltage in the winding from the voltage detection circuit. The controller is also configured to determine a fault has occurred, and to drive one of the first switch and the second switch when a fault has occurred.

Multi-stage low pressure drop muffler

A multi-stage low pressure drop muffler for a compressor including a first plate having a hole, a tube attached to the first plate, a plurality of holes disposed around the circumference of the tube, a plurality of tubes extending through a second plate, and an internal ring disposed on the second plate between the center of the second plate and the plurality of tubes. The muffler is designed to muffle a wide range of frequencies, minimize pressure reduction, improve fluid flow, and improve compressor efficiency.

Dynamically extensible and automatically configurable building automation system and architecture

A building automation system (BAS) architecture is disclosed. The BAS comprises, in one embodiment, an architecture comprising a communication network and having a dynamic extensibility capability and an automatic configuration capability; an engine communicatively coupled to the communication network; and at least one control device communicatively coupled to the communication network, the control device being known or unknown to the engine. The engine can be adapted to selectively implement the dynamic extensibility capability to establish communications with and to control both known and unknown control devices. The engine can be further adapted to selectively implement the automatic configuration capability to determine at least one characteristic of both known and unknown control devices. A method of adding a control device to a building automation system (BAS) by dynamically extending and automatically configuring an architecture of the BAS is also disclosed.

Thermostat temperature compensation modeling

Systems and methods for configuring a temperature control system of a heating, ventilation, and air conditioning (HVAC) system controller are described. The HVAC system controller includes a processor in communication with a memory and a user interface. The processor is configured to determine a dynamic parameter related to a dynamic property of a conditioned space and maintain a controlled environment within the conditioned space by utilizing the dynamic parameter.

Kapazitätsmodulierung einer Ausdehnungsvorrichtung einer Heizungs-, Lüftungs- und Klimaanlage

Verfahren, Systeme und Vorrichtungen betreffen eine Kapazitätsmodulierungsbaugruppe, die dafür konfiguriert ist, ein Zweiphasen-Kältemittelgemisch zu einem Verdampfer einer Heizungs-, Lüftungs- und Klimaanlage zu verteilen, wie zum Beispiel einem Mikrokanal-Wärmetauscher(MCHEX)-Verdampfer. Die Kapazitätsmodulierungsbaugruppe kann mehrere Ausdehnungsvorrichtungen enthalten. Während der Kapazitätsmodulation kann mindestens eine der mehreren Ausdehnungsvorrichtungen geschlossen werden, so dass eine Kältemittelströmungsrate durch die übrigen Ausdehnungsvorrichtungen aufrechterhalten werden kann. Die Kapazitätsmodulierungsbaugruppe kann eine Kältemittelausströmöffnung enthalten, die helfen kann, Kältemittel aus dem Wärmetauscher hinaus zu leiten. Die Kapazitätsmodulierungsbaugruppe kann mit dem MCHEX verbunden sein. Die mehreren Ausdehnungsvorrichtungen können dafür konfiguriert sein, sich innerhalb eines Verteilerkopfes des MCHEX zu erstrecken, um zu helfen, Kältemittel zu den Mikrokanalröhren ...

SYSTEM AND METHOD FOR CONTROLLING A FURNACE

Controlling a modulating gas furnace by monitoring a differential pressure associated with the modulating gas furnace using a low pressure limit switch configured to actuate at a first pressure, an intermediate pressure limit switch configured to actuate at a second pressure, and a high pressure limit switch configured to actuate at a third pressure, the second pressure being between the first and third pressure, selectively operating the modulating gas furnace in one of a cycling mode, a modulating mode in a lower range, and a modulating mode in an upper range, the modulating mode in the lower range being associated with an output capacity range between the output capacity ranges of the cycling mode and the modulating mode in the upper range, and selectively operating the furnace in response to at least one of the low pressure limit switch, the intermediate pressure limit switch, and the high pressure limit switch.

REVERSIBLE FLOW ELECTRIC EXPANSION VALVE

An HVAC system includes an electronic expansion valve, a motor, an obturator connected to the motor, the obturator being selectively movable in response to operation of the motor, a removable seat selectively received within a complementary portion of the electronic expansion valve, the removable seat being selectively movable in response to operation of the motor.

OIL-FREE LIQUID CHILLER

A refrigeration chiller (10) employs a centrifugal compressor (12) the impellers (42, 44) of which are mounted on a shaft (48) which it itself mounted for rotation using rolling element (53) bearings (52) lubricated only by the refrigerant which constitutes the working fluid of the chiller system (10). Apparatus is taught for providing liquid refrigerant to (1.) the bearings (25) immediately upon chiller start-up, during chiller operation and during a coastdown period subsequent to shutdown of the chiller (10) and (2.) the drive motor (40) of the chiller's compressor (12) for motor cooling purposes. By use of a variable speed-driven motor (40) to drive the compressor (12), optimized part load chiller performance is achieved in a chiller which does not require or employ an oil-based lubrification system.

CALIBRATING STEPPER MOTOR BY DRIVING FRACTIONAL RANGES

A stepper motor driving a driven member is calibrated by periodically driving the member from its current operational position to an end stop of the driven member's total travel range; however, the driven member approaches the end stop in a series of ever-shorter travel segments. The first travel segment is less than 1/3 the total travel range to compensate for a possible sudden speed reversal, which can be accidentally triggered by the driven member reaching and "bouncing off the end stop. Limiting the commanded first travel segment to less than 1/3 the total travel range prevents the driven member from reaching an opposite travel limit should the driven member suddenly reverse direction at three times the normal forward speed, wherein such triple speed is characteristic of reverse-speed situations.

EXPANSION VALVE CONTROL SYSTEM AND METHOD FOR AIR CONDITIONING APPARATUS

A method of reducing a cyclical loss coefficient of an HVAC system efficiency rating of an HVAC system includes operating the HVAC system using a recorded electronic expansion valve position of an electronic expansion valve of the HVAC system, discontinuing operation of the HVAC system, and resuming operation of the HVAC system using an electronic expansion valve position that allows greater refrigerant mass flow through the expansion valve as compared to the recorded electronic expansion valve position.

SUCTION DUCT AND DOUBLE SUCTION DUCT FOR A SUBMERGED EVAPORATOR

Un conduit d'aspiration (30) est disposé à l'intérieur d'un échangeur de chaleur tubulaire (10) et est disposé relativement haut et au-dessus du faisceau de tubes (14) de façon à ne pas entraîner d'éclaboussures vers le haut. Le conduit d'aspiration est configuré avec une zone agencée (32) en communication de fluide avec un passage d'écoulement (38) à l'intérieur du conduit d'aspiration. Le passage d'écoulement est en communication de fluide avec une sortie (24) de l'enceinte (12). Ceci est avantageux par rapport aux sorties de dessus d'enceinte traditionnelles qui ont généralement des emprises verticales plus élevées. La zone agencée peut faciliter et/ou maintenir un écoulement de vapeur relativement régulier dans l'enceinte. La zone agencée peut réaliser des écoulements de vapeur qui ont une certaine uniformité sur la longueur de l'enceinte, qui peut contrôler et/ou éviter un écoulement de vapeur localisé et/ou des courants locaux, tels que ceux ayant une vitesse élevée et pouvant provoquer ...

SUCTION DUCT AND DOUBLE SUCTION DUCT FOR A SUBMERGED EVAPORATOR

Un conduit d'aspiration (30) est disposé à l'intérieur d'un échangeur de chaleur tubulaire (10) et est disposé relativement haut et au-dessus du faisceau de tubes (14) de façon à ne pas entraîner d'éclaboussures vers le haut. Le conduit d'aspiration est configuré avec une zone agencée (32) en communication de fluide avec un passage d'écoulement (38) à l'intérieur du conduit d'aspiration. Le passage d'écoulement est en communication de fluide avec une sortie (24) de l'enceinte (12). Ceci est avantageux par rapport aux sorties de dessus d'enceinte traditionnelles qui ont généralement des emprises verticales plus élevées. La zone agencée peut faciliter et/ou maintenir un écoulement de vapeur relativement régulier dans l'enceinte. La zone agencée peut réaliser des écoulements de vapeur qui ont une certaine uniformité sur la longueur de l'enceinte, qui peut contrôler et/ou éviter un écoulement de vapeur localisé et/ou des courants locaux, tels que ceux ayant une vitesse élevée et pouvant provoquer ...

Variable economizer injection position

A compressor includes a bore, a rotor disposed within the bore, a compressor inlet, a compressor outlet and a compression chamber defined between the bore and the rotor. A volume of the compression chamber gradually reduces from the compressor inlet to the compressor outlet. An economizer is configured to fluidically connect to the compression chamber. The economizer is configured to inject a working fluid into the compression chamber at an injection position. The injection position is changeable according to a working condition of the compressor.

Air cleaning systems and methods

An HVAC system having an air cleaner, a fan configured to selectively generate an air flow, wherein at least a portion of the air flow is passed through the air cleaner, and a controller configured to control the air cleaner in response to at least one of a setting for controlling the fan and an operation characteristic of the fan is disclosed. A method of controlling an air cleaner by determining an air flow related criterion value, wherein the air flow is associated with an air flow through an air cleaner, comparing the determined air flow related criterion value to a threshold criterion value, and controlling the air cleaner as a function of a result of comparing the determined air flow related criterion value to the threshold criterion value is disclosed. A method of controlling an ozone concentration outputted by an air cleaner is disclosed.

System and method for OCR control in paralleled compressors

A heating, ventilation, air conditioning, and refrigeration (HVACR) system includes a first compressor having a first capacity, a second compressor having a second capacity, a condenser, an expansion device, and an evaporator fluidly connected. The first compressor and the second compressor are arranged in parallel. The first compressor includes a first lubricant sump. The second compressor includes a second lubricant sump. The first lubricant sump is fluidly connected to the second lubricant sump via a lubricant transfer conduit. A flow restrictor is disposed in the lubricant transfer conduit. The flow restrictor is configured to reduce a refrigerant flow between the first compressor and the second compressor.

System für gemeinsame Seitenanschlüsse für einen überdimensionierten Mehrplatten-Mikrokanal-Wärmeübertrager

Ein Mehrplatten-Mikrokanal-Wärmeübertrager, Folgendes aufweisend: eine erste Platte, wobei die erste Platte Folgendes aufweist: einen ersten Einlasssammler; einen ersten Auslasssammler; und eine erste Mehrzahl von Rohren, wobei die erste Mehrzahl von Rohren in Richtung entlang einer Länge des Wärmeübertragers hintereinander angeordnet ist, wobei jedes der ersten Mehrzahl von Rohren Mikrokanäle aufweist, die erste Mehrzahl von Rohren Einlässe und Auslässe aufweist, die Einlässe der ersten Mehrzahl von Rohren durch die Mikrokanäle der Mehrzahl von Rohren in Fluidverbindung mit den Auslässen der ersten Mehrzahl von Rohren stehen, und der erste Einlasssammler mit den Einlässen der ersten Mehrzahl von Rohren in Fluidverbindung steht und der erste Auslasssammler mit den Auslässen der ersten Mehrzahl von Rohren in Fluidverbindung steht; eine zweite Platte, die einen zweiten Einlasssammler und einen zweiten Auslasssammler aufweist; einen ersten Einlassanschluss, der mit dem ersten Einlasssammler ...

Vorrichtung zur Pulsations- und Schwingungskontrolle

Eine Vorrichtung zur Pulsations- und Schwingungskontrolle, umfassend eine Schalldämpfereinheit, die Folgendes umfasst:einen Flansch an einem Verdichterende;einen Schalldämpferkörper, der sich von einem ersten Teil des Flansches zu einer Ableitung erstreckt und mindestens eine Schwingungsdämpfungsstruktur enthält; und ein dem Verdichterende gegenüberliegendes freies Ende; und eine den Schalldämpferkörper umgebende Faltenbalganordnung, wobei die Faltenbalganordnung an einem zweiten Teil, der von dem ersten Teil verschieden ist, an dem Flansch befestigt ist und sich von dem Flansch zu der Ableitung erstreckt; undwobei der Schalldämpferkörper und die Faltenbalganordnung einander nicht berühren und das freie Ende des Schalldämpfers und die Ableitung einander nicht berühren.

EXPANSION VALVE CONTROL SYSTEM AND METHOD FOR AIR CONDITIONING APPARATUS

A method of reducing a cyclical loss coefficient of an HVAC system efficiency rating of an HVAC system includes operating the HVAC system using a recorded electronic expansion valve position of an electronic expansion valve of the HVAC system, discontinuing operation of the HVAC system, and resuming operation of the HVAC system using an electronic expansion valve position that allows greater refrigerant mass flow through the expansion valve as compared to the recorded electronic expansion valve position.

Building automation system data management

A building automation system (BAS) comprising a plurality of end devices, at least one communication network, and a protocol-independent server engine. The end devices are each associated with at least one of a space, a system, or a subsystem for at least a portion of a building or a campus. The communication network supports a plurality of communication protocols and communicatively couples at least a portion of the plurality of end devices. The server engine is communicatively coupled to the at least one communication network and includes means for selectively implementing a dynamic extensibility capability for the BAS that establishes communications with and control of the plurality of end devices over the plurality of communication protocols, and means for selectively implementing an automatic configuration capability for the BAS that supports addition of end devices to the plurality of end devices by determining at least one characteristic of each end device. Methods of establishing ...

Mounting assembly for heat exchanger coil

A multi-row heat exchanger coil includes a first row of coil, a second row of coil positioned generally parallel to the first row of coil, a bent portion fluidly communicating the first and second rows of coil, an interior space formed between the first and second rows of coil, and a mounting assembly. The mounting assembly includes at least one connection member configured to connect the first and second rows, thereby securing the first and second rows of coil to each other, a mounting member configured to prevent airflow from exiting from the interior space at a side of the multi-row heat exchanger coil, and fastening mechanism configured to attach the mounting member to the connection member.

Methods and systems for controlling a chiller system having a centrifugal compressor with a variable speed drive

Methods and systems for controlling a chiller system to achieve control stability while maintaining optimum efficiency. Particularly, methods and systems for controlling a centrifugal compressor speed and an inlet guide vane position that establishes three distinct regions in the control path: (i) during initial unloading from full load, the inlet guide vane position is kept at a fully open position while the centrifugal compressor speed is changed to achieve the desired cooling capacity; (ii) between an inflection point and a transition point, keeping the centrifugal compressor speed constant while the inlet guide vane position is changed to achieve the desired cooling capacity; and (iii) between the transition point and zero cooling capacity, changing both the inlet guide vane position and the centrifugal compressor speed to achieve the desired cooling capacity.

Actuator for a fan-powered damper

An HVAC (heating, ventilating and air conditioning) damper includes a series of pivotal damper blades that are opened by an air pressure differential across opposite sides of the damper. In some embodiments, a fan discharging against the damper blades provides the necessary air pressure to open the damper. To control how far the damper opens, an actuator moves a variable position abutment that obstructs the damper blades to limit how far they can pivot in the open direction. The position of the abutment is infinitely adjustable to provide the damper with infinite adjustment over a range of open positions. In some embodiments, the abutment applies a unidirectional torque to the damper blades regardless of whether the damper is opening or closing.

Floating restriction for a refrigerant line

A flow device for a refrigerant/compressor system is installed between the outlet of an evaporator and the suction port of a compressor. The device includes a floating element that helps inhibit liquid refrigerant from entering the compressor. Under certain conditions where liquid refrigerant discharges from the evaporator, the floating element floats in the discharged liquid. Upon doing so, the float rises to a generally closed position where the float obstructs a main fluid outlet that leads to the compressor. In the closed position, refrigerant can still pass through the flow device, but through a more restricted outlet. To prevent the float from undesirably rising under the impetus of refrigerant vapor flowing at high flow rates, the floating element itself includes a flow-restricting passageway, radial guides, and/or a streamlined shape. The float can be incorporated within a manifold of a multi-coil or multi-circuited heat exchanger.

VALVE AND SUBCOOLER FOR STORING REFRIGERANT

A reversible HVAC heating/cooling refrigerant system includes a novel valve system that allows an outdoor heat exchanger to function as a subcooler during a cooling or defrost mode and function as a receiver tank for storing excess liquid refrigerant during a heating mode. In the heating mode, a cooling expansion valve is kept slightly open to flood the subcooler with liquid refrigerant while a heating expansion valve is regulated to maintain a desired level of superheat at the suction side of the refrigerant system's compressor. The novel valve system also serves as a pressure relief valve to protect the subcooler from excess pressure caused by thermal expansion of liquid refrigerant trapped within the subcooler.

Electronics cooling using lubricant return for a shell-and-tube style evaporator

A refrigeration system that induces lubricant-liquid refrigerant mixture flow from a flooded or falling film evaporator by means of the lubricant-liquid refrigerant mixture flow adsorbing heat from an electronic component.

Methods and systems of streaming refrigerant in a heat exchanger

Embodiments are disclosed to help create longitudinal refrigerant streams, for example, in a shell and tube type evaporator, so as to manage refrigerant and/or lubricant in the evaporator. In some embodiments, the shell side of the evaporator may include a plurality of longitudinally extended pans stacked in a vertical direction. In some embodiments, refrigerant can be directed onto a top pan. The refrigerant can form a longitudinal refrigerant stream along the pan and flow down to the next pan in the vertical direction and form another longitudinal refrigerant stream. Each of the pans may form a refrigerant pool to help exchange heat with a process fluid carried in heat exchanger tubes. By forming longitudinal refrigerant streams in the pans, heat exchange efficiency may be improved and a lubricant content in refrigerant streams may be concentrated toward a bottom of the evaporator.

Retrofitting R410A HVAC products to handle flammable refrigerants

A system and method of retrofitting a heating, ventilation, air conditioning, and refrigeration system (HVACR) including one or more brazed, soldered, or mechanical connections between refrigerant lines is disclosed. The method includes removing a refrigerant from the HVACR system. The refrigerant that is removed is a non-flammable refrigerant. An enclosure is installed over the one or more brazed, soldered, or mechanical connections between refrigerant lines. A refrigerant is added to the HVACR system. The refrigerant being added has a global warming potential (GWP) that is relatively lower than the refrigerant removed from the HVACR system. The refrigerant being added has a relatively higher flammability than the refrigerant removed from the HVACR system.

Reversible heat pump

There is disclosed a reversible heat pump system 100 and a method of operating a reversible heat pump system to control the temperature of a process fluid of a chiller system 500. In a cooling mode, a working fluid is circulated for co-current flow with a process fluid at a heat exchanger 104 functioning as an evaporator heat exchanger, whereas in a heating mode, the working fluid is circulated for counter-current flow with the process fluid at the same heat exchanger 104 functioning as a condenser heat exchanger.

Leckdetektion in einem Fluidkompressionssystem

Leckdetektionssystem, umfassend: ein Spülsystem, das an einen Kältekreis angeschlossen ist, wobei das Spülsystem bei einem Unterdruck arbeitet und eine Spülausstoßrate aufweist; einen ersten Drucksensor, der einem dem Kältekreis zugehörigen Kondensator zugeordnet ist; einen zweiten Drucksensor, der einem dem Kältekreis zugehörigen Verdampfer zugeordnet ist; einer Steuerung in einer elektrischen Verbindung mit dem ersten und dem zweiten Drucksensor, die einen Differenzdruck berechnet; wobei die Steuerung wenigstens zum Teil auf Basis des Differenzdrucks eine Kondensatorleckgröße bestimmt; wobei die Steuerung auf Basis des Differenzdrucks und der Kondensatorleckgröße eine Arbeitsfluidemissionsrate berechnet.

AIR FILTRATION SYSTEM CONTROL

An intense field dielectric air filtration system associated with an air conditioning unit includes a microprocessor based control system which may be connected to the thermostat of the air conditioning unit to energize the air filtration system in response to a call for heat or cooling signal at the thermostat or startup of the fan motor for the air conditioning unit. The control system includes a power supply for the air filtration system together with voltage and current monitoring circuits for detecting a fault condition. Filtration system on/off and timing function reset switches are connected to the microprocessor and visual displays, including a multicolored LED bargraph display, are controlled by the microprocessor to indicate voltage potential applied to the air filtration system, a fault condition or a test mode.

CONDENSER FOR AIR COOLED CHILLERS

A heat exchanger comprising a first coil assembly (14) including an inlet manifold (30); an outlet manifold (34) parallel to and spaced from the inlet manifold (30); and a plurality of tubes (32) each operably connected to and linking the inlet (30) and the outlet (34) manifolds, each tube (32) having a multiplicity of flow paths (40, 42, 44, 46, 48, 60) and a hydraulic diameter HD in the range of 0.07 <= to HD <= 0.30 inches.

MODULAR AIR HANDLING UNIT

An air handling unit has a first modular cabinet comprising a first profile, a second modular cabinet comprising a second profile that is complementary to the first profile, and the first profile comprises an alignment feature. An air handling unit has a heat exchanger cabinet comprising a first profile, a blower cabinet comprising a second profile complementary to the first profile, a first connector system disposed at least partially on each of the heat exchanger cabinet and the blower cabinet, and the first connector system is operable to releasably secure the first profile to the second profile. An air handling unit has a first modular cabinet comprising a first portion of a first connection system and a second modular cabinet comprising a second portion of the first connection system. A component of the first portion may be least partially received within the second portion.

BLOWER ASSEMBLY

An air handling unit has a blower assembly, a first interior zone, and a second interior zone and the blower assembly physically separates the first interior zone from the second interior zone. A method includes providing a cabinet configured to receive a blower assembly, inserting a blower assembly into the air duct, and closing a cabinet door of the cabinet, wherein upon closing the cabinet door, the primary air flow path from a location within the cabinet downstream of the blower assembly to a location within the cabinet upstream of the blower assembly is through a blower housing of the blower assembly. A blower assembly has a blower housing comprising at least one air inlet and at least one air outlet and a blower deck extending from the outlet, wherein the blower deck comprises at least one substantially flat component having a substantially orthogonal wall extending from the flat component.

Systems and methods to detect heater malfunction and prevent dry burning

A heater, e.g. an anti-freezing heater, is disclosed. The heater can be configured to set off an alarm when a heating element is broken or malfunctioning. The heater can also be configured to connect the heating element to a relatively low voltage when the heating element may experience a dry burning condition.

Variable evaporator water flow compensation for leaving water temperature control

A method of controlling a refrigerant chiller system is particularly suited for chillers where the water being chilled (or some other liquid) flows through the chiller's evaporator at a flow rate that is variable and is not directly known. To effectively control the chiller and maintain the temperature of the water leaving the evaporator at a desired target temperature, the cooling capacity of the chiller's evaporator is estimated based the degree of valve opening of an expansion valve, a pressure differential across the expansion valve, and a change in enthalpy per unit mass of the refrigerant flowing through the evaporator. In some embodiments, the chiller system includes multiple refrigerant circuits that are hermetically isolated from each other.

Compressor bearing housing drain

A bearing housing drain in a scroll compressor and method for controlling lubrication of a thrust bearing in the scroll compressor are disclosed. The compressor includes a compressor housing; a non-orbiting scroll member and an orbiting scroll member; an orbiting scroll hub having an upper end and a lower end, the lower end being disposed at a vertical elevation that is lower than the upper end; a thrust bearing; a lubricant sump; a housing drain cavity disposed within the compressor housing and configured to receive lubricant from the lubricant sump and to deliver the lubricant to the thrust bearing; and a bearing housing drain fluidly connected to the housing drain cavity and the lubricant sump.

Variable Capacity Screw Compressor and Method

A variable capacity screw compressor comprises a suction port, at least two screw rotors and a discharge port being configured in relation to a selected rotational speed that operates at least one screw rotor at an optimum peripheral velocity that is independent of a peripheral velocity of the at least one screw rotor at a synchronous motor rotational speed for a rated screw compressor capacity. A motor is configured to drive the at least one screw rotor at a rotational speed at a full-load capacity that is substantially greater than the synchronous motor rotational speed at the rated screw compressor capacity. A variable speed drive receives a command signal from a controller and generates a control signal that drives the motor at the selected rotational speed. A method for sizing at least two variable capacity screw compressors and a refrigeration chiller incorporating a variable capacity screw compressor are separately presented. 1. A variable capacity screw compressor comprising:a rotor housing comprising a suction port, a working chamber, a discharge port, and at least two screw rotors that comprise a female screw rotor and a male screw rotor being positioned within the working chamber for cooperatively compressing a fluid; the suction port, the at least two screw rotors and the discharge port being configured in relation to a selected rotational speed; the selected rotational speed operates at least one screw rotor at an optimum peripheral velocity that is independent of a peripheral velocity of the at least one screw rotor at a synchronous motor rotational speed for a rated screw compressor capacity;a motor operable to drive the at least one screw rotor at a rotational speed at a full-load capacity that is substantially greater than the synchronous motor rotational speed at the rated screw compressor capacity; anda variable speed drive to receive a command signal from a controller and to generate a control signal that drives the motor at the rotational speed. ...

BRUSH-TYPE SEAL FOR AN AIR-HANDLING UNIT

An air-handling unit including a housing with a discharge opening, and a fan disposed substantially within the housing. The fan includes a fan discharge that extends through the discharge opening thereby defining a gap between the fan discharge and the housing surrounding the discharge opening. A brush seal is coupled to one of the housing about the discharge opening and the fan discharge such that the brush seal extends across the gap forming a seal between the discharge opening and the fan discharge. 1. An air-handling unit comprising:a housing with a discharge opening;a fan disposed substantially within the housing, the fan having a fan discharge that extends through the discharge opening thereby defining a gap between the fan discharge and the housing surrounding the discharge opening; anda brush seal coupled to one of the housing about the discharge opening and the fan discharge such that the brush seal extends across the gap forming a seal between the discharge opening and the fan discharge.2. The air-handling unit of claim 1 , wherein the fan discharge has a perimeter and the brush seal extends around the entire perimeter.3. The air-handling unit of claim 1 , wherein the discharge opening has a perimeter and the brush seal is coupled to the housing and extends around the entire perimeter.4. The air-handling unit of claim 3 , wherein the discharge opening is rectangular shaped and the brush seal includes a plurality of brushes claim 3 , wherein at least two of the plurality of brushes overlap with each other at a corner of the discharge opening.5. The air-handling unit of claim 1 , wherein the brush seal is coupled to the housing about the discharge opening.6. The air-handling unit of claim 1 , wherein the brush seal includes a brush having nylon bristles.7. The air-handling unit of claim 1 , wherein the brush seal includes a brush having nylon bristles on one side and a metal holder assembly securing the nylon bristles at the other side.8. The air-handling ...

Wear-Leveling For Components of an Auxiliary Heat Source

In at least some embodiments, an air handler includes a coil and a fan. The air handler also includes an auxiliary heat source having a plurality of heat elements. The auxiliary heat source implements a wear-leveling algorithm to cycle use of the heat elements over multiple auxiliary heat cycles. 1. An air handler , comprising:a coil;a fan; andan auxiliary heat source having a plurality of heat elements, wherein the auxiliary heat source implements a wear-leveling algorithm to cycle use of the heat elements over multiple auxiliary heat cycles.2. The air handler of wherein the auxiliary heat source comprises a controller that implements the wear-leveling algorithm to select at least one heat element to energize for each auxiliary heat cycle.3. The air handler of wherein the auxiliary heat source comprises a switch unit for each heat element claim 2 , wherein each switch unit selectively operates to energize its corresponding heat element in accordance with control signals generated by the controller.4. The air handler of wherein each switch unit corresponds to a relay.5. The air handler of wherein each switch unit corresponds to a contactor.6. The air handler of wherein the controller accesses cycle count information stored for each heat element to select at least one heat element to energize for each auxiliary heat cycle.7. The air handler of wherein the controller is configured to access wear-tracking information to select a least-used heat element for a given auxiliary heat cycle and to update wear-tracking information to account for any heat elements energized during the given auxiliary heat cycle.8. The air handler of wherein the controller is configured to detect occurrence of a heat element fault and to implement a fault-handling algorithm in response to the detected heat element fault.9. The air handler of wherein the fault-handling algorithm causes the controller avoid updating wear-tracking information for any heat elements associated with the detected heat ...

Air Cleaning Systems and Methods

An HVAC system having an air cleaner, a fan configured to selectively generate an air flow, wherein at least a portion of the air flow is passed through the air cleaner, and a controller configured to control the air cleaner in response to at least one of a setting for controlling the fan and an operation characteristic of the fan is disclosed. A method of controlling an air cleaner by determining an air flow related criterion value, wherein the air flow is associated with an air flow through an air cleaner, comparing the determined air flow related criterion value to a threshold criterion value, and controlling the air cleaner as a function of a result of comparing the determined air flow related criterion value to the threshold criterion value is disclosed. A method of controlling an ozone concentration outputted by an air cleaner is disclosed.

HVAC System with Multipurpose Cabinet for Auxiliary Heat Transfer Components

An HVAC system having an airflow path, a primary heat exchanger disposed along the airflow path, wherein the airflow path at least partially passes through the primary heat exchanger, and a multipurpose cabinet selectively configurable between at least a first configuration for housing a first type of auxiliary heat transfer component and a second configuration for housing a second type of auxiliary heat transfer component, wherein the airflow path at least partially passes through the multipurpose cabinet.

Systems and Methods for Controlling Humidity

An HVAC system has a plurality of humidity sensors and a controller configured to selectively control which of the plurality of humidity sensors affects operation of the HVAC system. A method of controlling humidity includes providing a plurality of humidity sensors, assigning one of the plurality of humidity sensors as a humidity priority sensor, and affecting a humidity in response to feedback from the humidity priority sensor. A system controller for an HVAC system has an interface configured to present a plurality of humidity sensors and the system controller is configured to allow a user to select which of the plurality of humidity sensors affects operation of the HVAC system. 1. An HVAC system , comprising:a plurality of humidity sensors;a controller configured to selectively control which of the plurality of humidity sensors affects operation of the HVAC system.2. The HVAC system of claim 1 , wherein the controller is configured to allow a user to select which of the plurality of humidity sensors affects operation of the HVAC system.3. The HVAC system of claim 1 , wherein at least one of the plurality of humidity sensors is located remote from the controller.4. The HVAC system of claim 1 , wherein the controller is configured to automatically select which of the plurality of humidity sensors affects operation of the HVAC system based on feedback from the plurality of humidity sensors.5. The HVAC system of claim 1 , wherein the HVAC system is configured to operate to reduce humidity in response to a selected one of the plurality of humidity sensors sensing a humidity greater than a target humidity.6. The HVAC system of claim 1 , wherein the controller is configured to allow a user to specify different target humidity to different ones of the plurality of humidity sensors.7. A method of controlling humidity claim 1 , comprising:providing a plurality of humidity sensors;assigning one of the plurality of humidity sensors as a humidity priority sensor; ...

Systems and Methods for Cleaning Air

An HVAC system has an electrically powered air cleaner, a fan configured to selectively move air through the air cleaner, and a controller having an interface for receiving a selection of a clean air cycle. The controller is configured to control a clean air delivery rate (CADR) of the HVAC system for a clean air cycle duration in response to a receipt of a selection of the clean air cycle. A method of controlling air cleaning includes displaying a first clean air cycle that is configured to control a clean air delivery rate for a first clean air cycle duration wherein the first clean air cycle is associated with a first air flow related setting and a first air cleaner power level setting, selecting the first clean air cycle, and overriding at least one of a previous air flow related setting and a previous air cleaner power level setting. 1. An HVAC system , comprising:an electrically powered air cleaner;a fan configured to selectively move air through the air cleaner; anda controller comprising an interface for receiving a selection of a clean air cycle;wherein the controller is configured to control a clean air delivery rate (CADR) of the HVAC system for a clean air cycle duration in response to a receipt of a selection of the clean air cycle.2. The HVAC system of claim 1 , wherein the controller is configured to control the CADR by controlling at least one of a speed of the fan and a power level of the air cleaner.3. The HVAC system of claim 1 , wherein the controller is configured to temporarily override at least one of a speed of the fan and a power level of the air cleaner for the clean air cycle duration.4. The HVAC system of claim 1 , wherein the controller is configured to present a plurality of clean air cycles for selection by a user and wherein the plurality of clean air cycles control the CADR to achieve different CADR values.5. The HVAC system of claim 1 , wherein the controller is configured to present a plurality of clean air cycles for selection by ...

Gas-Fired Furnace and Intake Manifold for Low NOx Applications

A gas-fired air conditioning furnace comprises a monolithic intake manifold including an inlet at a first end and a plurality of outlets at a second end opposite the first end. In addition, the furnace comprises a burner assembly including a plurality of burners, each burner is configured to combust an air-fuel mixture at least partially within an interior space of the burner. Further, each burner extends into one of the outlets of the intake manifold. 1. A gas-fired air conditioning furnace , comprising:a monolithic intake manifold including an inlet at a first end and a plurality of outlets at a second end opposite the first end;a burner assembly including a plurality of burners, each burner configured to combust an air-fuel mixture at least partially within an interior space of the burner; andwherein each burner extends into one of the outlets of the intake manifold.2. The furnace of claim 1 , wherein the intake manifold includes a distributor extending from the first end and a plurality of supply tubes extending from the second end to the distributor;wherein the distributor includes the inlet and each supply tube includes one of the plurality of outlets;wherein the distributor is configured to divide the air-fuel mixture among the plurality of supply tubes.3. The furnace of claim 2 , wherein the distributor includes a plurality of outlets claim 2 , wherein each of the plurality of outlets of the distributor is configured to supply a portion of the air-fuel mixture to one of the supply tubes.4. The furnace of claim 2 , wherein the inlet of the intake manifold has a central axis and each of the supply tubes has a central axis that is parallel to the central axis of the inlet.5. The furnace of claim 4 , wherein the central axis of the inlet and the central axis of each supply tube is disposed in a common plane.6. The furnace of claim 2 , wherein each burner comprises a cylindrical body having an occluded end disposed in the intake manifold and an open end extending ...

Methods and Systems for Controlling a Hybrid Heating System

In at least some embodiments, a hybrid heating system includes a heat pump and an auxiliary furnace. The system also includes a controller coupled to the heat pump and the auxiliary furnace. The controller, in response to receiving a heat request, selects either the heat pump or the auxiliary furnace based on an economic balance point algorithm. 1. A hybrid heating system , comprising:a heat pump;an auxiliary furnace; anda controller coupled to the heat pump and the auxiliary furnace,wherein the controller, in response to receiving a heat request, selects either the heat pump or the auxiliary furnace based on an economic balance point algorithm.2. The hybrid heating system of wherein the economic balance point algorithm comprises an auxiliary furnace fuel cost parameter claim 1 , a heat pump electricity cost parameter claim 1 , a heat pump efficiency parameter claim 1 , and an auxiliary furnace efficiency parameter.3. The hybrid heating system of wherein the economic balance point algorithm implements default values for at least one of the auxiliary furnace fuel cost parameter claim 2 , the heat pump electricity cost parameter claim 2 , the heat pump efficiency parameter claim 2 , and the auxiliary furnace efficiency parameter.4. The hybrid heating system of wherein the controller comprises a user interface and wherein values for at least one of the auxiliary furnace fuel cost parameter claim 2 , the heat pump electricity cost parameter claim 2 , the heat pump efficiency parameter claim 2 , and the auxiliary furnace efficiency parameter are based on user input via the user interface.5. The hybrid heating system of wherein the economic balance point algorithm determines an outdoor temperature balance point at which operating the auxiliary furnace is less expensive than operating the heat pump.6. The hybrid heating system of wherein the controller claim 5 , in response to receiving a heat request claim 5 , compares a current outdoor temperature with a previously ...

Systems and Methods For Controlling Multiple HVAC Systems

An HVAC control system has a first system controller associated with a first HVAC system and configured to control the first HVAC system and a second system controller associated with a HVAC system and configured to control the second HVAC system wherein the first system controller is selectively operable to control the second HVAC system. A method of controlling multiple HVAC systems includes providing a first HVAC system comprising a required first system controller, providing a second HVAC system comprising a required second system controller, and enabling wireless communication between the first system controller and the second system controller. 1. An HVAC control system , comprising:a first system controller associated with a first HVAC system and configured to control the first HVAC system; anda second system controller associated with a HVAC system and configured to control the second HVAC system;wherein the first system controller is selectively operable to control the second HVAC system.2. The HVAC control system of claim 1 , wherein the first system controller is a necessary component of the first HVAC system.3. The HVAC control system of claim 1 , wherein the second system controller is a necessary component of the second HVAC system.4. The HVAC control system of claim 1 , wherein the first system controller is a necessary component of the first HVAC system and wherein the second system controller is a necessary component of the second HVAC system.5. The HVAC control system of claim 1 , wherein the first system controller is connected to the first HVAC system via a first wired communication connection claim 1 , wherein the second system controller is connected to the second HVAC system via a second wired communication connection claim 1 , and wherein the first wired communication connection is a separate communication bus from the second wired communication connection.6. The HVAC control system of claim 1 , wherein the first system controller and the ...

Method of Adaptive Control of a Bypass Damper in a Zoned HVAC System

A zoned HVAC system comprises an HVAC unit including a climate control system and an air mover. In addition, the system comprises a supply air duct in fluid communication with the outlet of the HVAC unit. Further, the system comprises a return air duct in fluid communication with the inlet of the HVAC unit. Still further, the system comprises a plurality of zones positioned between the supply air duct and the return air duct. Moreover, the system comprises a bypass duct extending between the supply air duct and the return air duct. The bypass duct includes an active bypass damper having an open position, a closed position, and a plurality of partially opened positions. The system also comprises a control device configured to control the position of the bypass duct. 1. A zoned HVAC system , comprising:an HVAC unit including a climate control system configured to control the properties of a flow of air passing through the HVAC unit and an air mover adapted to create a pressure differential between an inlet and an outlet of the HVAC unit;a supply air duct in fluid communication with the outlet of the HVAC unit;a return air duct in fluid communication with the inlet of the HVAC unit;a plurality of zones positioned between the supply air duct and the return air duct, wherein each zone includes a climate controlled space;a bypass duct extending between the supply air duct and the return air duct, wherein the bypass duct includes an active bypass damper having an open position, a closed position, and a plurality of partially opened positions;a control device configured to control the position of the bypass duct.2. The system of claim 1 , further comprising a pressure differential sensor configured to measure the pressure differential across the bypass damper and communicate the measured pressure differential to the control device.3. The system of claim 2 , wherein the control device is configured to determine an actual flow rate through the bypass duct with the measured ...

Methods and Systems For Controlling An Energy Recovery Ventilator (ERV)

In at least some embodiments, a system includes a heat pump and an energy recovery ventilator (ERV). The system also includes a controller coupled to the heat pump and the ERV. The controller implements an ERV operation algorithm that automates operations of the ERV. 1. A system , comprising:a heat pump;an energy recovery ventilator (ERV); anda controller coupled to the heat pump and the ERV, wherein the controller implements an ERV operation algorithm that automates operations of the ERV.2. The system of wherein the controller directs operations of the ERV and the heat pump independently.3. The system of wherein the controller directs the heat pump to operate at the same time as the ERV.4. The system of wherein the ERV operation algorithm determines a cubic feet per minute (CFM) ventilation value and automates operating the ERV based on the CFM ventilation value.5. The system of wherein the ERV operation algorithm compares the CFM ventilation value with a total CFM capacity of the ERV and automates operating the ERV based on the comparison.6. The system of further comprising a user interface coupled to the controller claim 4 , wherein the CFM ventilation value is determined based on input received via the user interface.7. The system of wherein the user interface provides a square footage query form and wherein the CFM ventilation value is determined based on square footage information received via the square footage query form.8. The system of wherein the ERV operation algorithm estimates load information for automated operations of the ERV.9. The system of further comprising a user interface claim 8 , wherein the estimated load information is based on relative humidity information received via the user interface.10. The system of wherein the user interface displays sensible load information and latent load information related to automated operation of the ERV using the ERV operation algorithm.11. A control system for an energy recovery ventilator (ERV) claim 9 , ...

Water flow measurement device

A chiller system including an evaporator for evaporating a refrigerant and a water pipe in fluid communication with the evaporator. The water pipe is configured to allow water to pass through at a flow rate and to circulate the water with the evaporator to exchange heat with the refrigerant in the evaporator. The chiller system includes a flow restrictor tube within the water pipe that is configured to allow the water to flow through the flow restrictor tube at a reduced flow rate relative to the flow rate. The chiller system also includes a measuring probe that passes through walls of the water pipe and the flow restrictor tube and includes an accuracy range of flow rates less than the flow rate. The measuring probe is configured to measure the reduced flow rate within the flow restrictor tube where the reduced flow rate is within the accuracy range.

Systems and Methods For Joining Metal

A metal joining system having a first burner assembly configured to selectively heat a first zone and an assembly support at least partially vertically lower than at least a portion of the first heat zone and a first hood vertically above at least a portion of the assembly support. 1. A method of joining metal components , comprising:providing a conveyor comprising a conveyor path;providing a hood that extends along the conveyor path, the hood comprising a concavity comprising an open entry side, an open exit side, an open first side, and an open second side;providing heat to the concavity; andretaining heat within the concavity by preventing an outflow of heated fluid from the concavity via at least one of the first side and the second side relatively more effectively than via at least one of the entry side and the exit side when the outflow is substantially due to a buoyancy of the heated fluid.2. The method according to claim 1 , further comprising:locating at least a portion of a metal component within the concavity.3. The method according to claim 2 , further comprising:monitoring the providing heat to the concavity using a thermocouple.4. The method according to claim 3 , further comprising:heating at least a portion of the metal component as a function of feedback received from the thermocouple.5. The method according to claim 2 , further comprising:monitoring the providing heat to the concavity using a pyrometer.6. The method according to claim 5 , further comprising:heating at least a portion of the metal component as a function of feedback received from the pyrometer.7. A method of joining metal claim 5 , comprising:providing a conveyor;providing a first hood and a second hood;selectively operating a first burner to provide heat to a concavity of the first hood and selectively operating a second burner to provide heat to a concavity of the second hood; andoperating the conveyor to move at least a portion of a metal component from vertically below the first ...

Reversible Flow Electronic Expansion Vavle

An HVAC system includes an electronic expansion valve having a movable obturator with a truncated tip and a port configured to selectively receive the truncated tip. An electronically controlled expansion valve includes a movable obturator with a truncated tip and a port configured to selectively receive the truncated tip. A method of operating a heat pump HVAC system includes providing an electronically controlled expansion valve comprising an obturator having a truncated tip and flowing refrigerant through the valve. 1. An HVAC system , comprising: a movable obturator comprising a truncated tip; and', 'a port configured to selectively receive the truncated tip., 'an electronic expansion valve, comprising2. The HVAC system of claim 1 , wherein the truncated tip comprises a substantially flat surface.3. The HVAC system of claim 2 , wherein the flat surface is configured to substantially face the port.4. The HVAC system of claim 1 , wherein the obturator comprises a truncated cone.5. The HVAC system of claim 1 , wherein the obturator comprises a truncated spherical section.6. The HVAC system of claim 1 , wherein the electronic expansion valve is operable between a metered state and an unmetered state.7. The HVAC system of claim 6 , wherein the truncated tip is located in the port in the metered stated and wherein the truncated tip is located outside the port in the unmetered state.8. The HVAC system of claim 1 , wherein the HVAC system is a heat pump system.9. An electronically controlled expansion valve claim 1 , comprising:a movable obturator comprising a truncated tip; anda port configured to selectively receive the truncated tip.10. The valve of claim 9 , wherein the obturator comprises a frustoconical shape.11. The valve of claim 9 , wherein the obturator comprises a truncated spherical section.12. The valve of claim 9 , wherein the valve comprises a side surface joined to a substantially flat surface and wherein the flat surface is between the side surface and ...

COMPOSITE METAL-POLYMER BUSHING AND CRANKSHAFT ASSEMBLY

An assembly includes a composite metal-polymer bushing having an outer metal layer with an inner surface, metal particles sintered to the inner surface, a polymer material between the metal particles, a finished interior surface collectively defined by the polymer material and exposed portions of the metal particles, a plurality of interstices formed between the metal particles and the polymer material, and a plurality of ridges defined by the polymer material that protrude above the metal particles. The ridges occupy at least about 8% of the area of a cylindrical reference surface nominally coinciding with the finished interior surface. The assembly also includes a crankshaft having a journal at least partially received within the bushing and supported by the finished interior surface. The journal is polished to a surface finish of about 0.1 microns or less to reduce a wear rate of the bushing. 1. An assembly comprising: an outer metal layer having an inner surface,', 'metal particles sintered to the inner surface,', 'a polymer material between the metal particles,', 'a finished interior surface collectively defined by the polymer material and exposed portions of the metal particles,', 'a plurality of interstices formed between the metal particles and the polymer material, and', 'a plurality of ridges defined by the polymer material that protrude above the metal particles, the ridges occupying at least about 8% of the area of a cylindrical reference surface nominally coinciding with the finished interior surface; and, 'a composite metal-polymer bushing including'}a crankshaft including a journal at least partially received within the bushing and supported by the finished interior surface, wherein the journal is polished to a surface finish of about 0.1 microns or less to reduce a wear rate of the bushing.2. The assembly of claim 1 , wherein at least some of the interstices are exposed to the finished interior surface.3. The assembly of claim 2 , further comprising ...

Modulating Gas Furnace

A method controls a modulating gas furnace by monitoring a differential pressure associated with the modulating gas furnace, learning an intermediate value associated with an intermediate capacity between a minimum output capacity of the gas furnace and a maximum output capacity of the gas furnace, learning one of a high value associated with the maximum output capacity and a low value associated with a minimum output capacity, establishing an estimated operating curve using either the intermediate value and the low value or using the intermediate value and the high value, and operating the gas furnace in accordance with the estimated operating curve. 1. A modulating gas furnace , comprising: monitor a differential pressure associated with the modulating gas furnace;', 'learn an intermediate value associated with an intermediate capacity between a minimum output capacity of the gas furnace and a maximum output capacity of the gas furnace;', 'learn one of a high value associated with the maximum output capacity and a low value associated with a minimum output capacity;', 'establish an estimated operating curve using either the intermediate value and the low value or using the intermediate value and the high value; and', 'control the gas furnace in accordance with the estimated operating curve., 'at least one general-purpose processor system configured to2. The modulating gas furnace of claim 1 , wherein the estimated operating curve is established using the intermediate value and the low value if a demand for heat is equal to or greater than the minimum capacity and is less than or equal to the intermediate capacity and wherein the estimated operating curve is established using the intermediate value and the high value if the demand for heat is greater than the intermediate capacity.3. The modulating gas furnace of claim 1 , wherein the at least one general-purpose processor system is further configured to:learn the high value if the estimated operating curve is ...

System and Method for Heating Ventilation and Air Conditioning Component Detection

A method for detecting heating, ventilation, and air conditioning (HVAC) components is provided. The method includes the steps of measuring an initial current at a current sensor in a circuit, while a relay is de-energized; energizing the relay; measuring, at a periodic interval, an energized current while the relay is energized; incrementing a counter if an absolute difference between a first voltage related to the energized current and a second voltage related to the initial current is above a threshold; and determining a HVAC component is present if the counter exceeds a pre-determined value during a pre-determined time period. 1. A method for detecting heating , ventilation , and air conditioning (HVAC) components comprising:measuring an initial current at a current sensor in a circuit, while a relay is de-energized;energizing the relay;measuring, at a periodic interval, an energized current while the relay is energized;incrementing a counter if an absolute difference between a first voltage related to the energized current and a second voltage related to the initial current is above a threshold; anddetermining a HVAC component is present if the counter exceeds a pre-determined value during a pre-determined time period.2. The method of claim 1 , wherein the HVAC component is one of a zone damper claim 1 , a zone sensor claim 1 , a heat pump claim 1 , an air conditioner claim 1 , and a driver circuit.3. The method of claim 2 , further comprising:detecting a number of stages of the HVAC component.4. The method of claim 1 , further comprising:indicating the presence of the HVAC component; andconfiguring a HVAC system based upon the indication.5. The method of claim 4 , further comprising:indicating the absence of a required HVAC component based upon the presence of the HVAC component.6. The method of claim 5 , wherein the required HVAC component is a zone sensor and the HVAC component is a zone damper.7. A heating claim 5 , ventilation claim 5 , and air ...

REVERSE ROTATION BRAKING FOR A PM MOTOR

A system for operating a compressor. The system includes a motor, an inverter bridge, a voltage detection circuit, and a controller. The motor has a stator and a rotor. The inverter bridge is configured to provide a voltage to the stator, and includes a first switch connected in a series-type relationship with a second switch, a first diode coupled across the first switch, and a second diode coupled across the second switch. The voltage detection circuit is configured to detect a back EMF voltage in the winding. The controller is coupled to the inverter bridge and the voltage detection circuit. The controller is configured to control the first switch and the second switch to drive the motor, and to receive an indication of the back EMF voltage in the winding from the voltage detection circuit. The controller is also configured to determine a fault has occurred, and to drive one of the first switch and the second switch when a fault has occurred. 1. A system for operating a compressor , the system comprising:a motor having a winding and a rotor;an inverter bridge configured to provide a voltage to the winding, the inverter bridge including a first switch connected in a series-type relationship with a second switch, a first diode coupled across the first switch, and a second diode coupled across the second switch;a voltage detection circuit configured to detect a back EMF voltage in the winding; anda controller coupled to the inverter bridge and the voltage detection circuit, the controller configured to control the first switch and the second switch to drive the motor, to receive an indication of the back EMF voltage in the winding from the voltage detection circuit, and to determine a fault has occurred, and to drive one of the first switch and the second switch when a fault has occurred.2. The system of claim 1 , wherein the controller determines a fault has occurred when the back EMF voltage equals about zero when a back EMF voltage is expected.3. The system of ...

System and Method for Oil Return in an HVAC System

A system and a method are provided for returning oil in a heating, ventilation, and air conditioning (HVAC) system by determining when an ambient zone temperature is equal to or less than a temperature limit and reversing a direction of refrigerant flow of the HVAC system based on the length of time. Also, a system and a method are provided for monitoring the length of operation in a first and a second heating mode and for reversing a direction of refrigerant flow based on the length of time operation occurs in the first and second heating modes. A system and a method having a first compressor, a first heating mode, a second heating mode, a defrost mode, and a controller is disclosed. The controller selectively controls initiation of the defrost mode in response to an HVAC system operating in a heating mode of operation for a predetermined amount of time. 1. A heating , ventilation , and air conditioning (HVAC) system , comprising:a processor configured to determine when an ambient zone temperature is equal to or less than a first temperature limit;a processor configured to calculate a first length of time using a first timer, the first length of time being the length of time that a first compressor operates at a first capacity to deliver refrigerant to a first circuit of a first heat exchanger and during which operation the ambient zone temperature is equal to or less than the first temperature limit;a processor configured to initiate reversing a direction of refrigerant flow of the HVAC system when the first length of time is equal to or greater than a first time limit;a processor configured to determine when the ambient zone temperature is equal to or less than a second temperature limit, the second temperature limit having a value higher than the value of the first temperature limit;a processor configured to calculate a second length of time using a second timer, the second length of time being the length of time that the first compressor operates at a second ...

Pressure Correcting Distributor For Heating and Cooling Systems

A distributor assembly has a distributor extending along a central axis between a first end and a second end opposite the first end. The distributor has a flow passage extending from the first end of the distributor and a plurality of feeder ports extending from the second end of the distributor to the flow passage and each feeder port is in fluid communication with the flow passage. Each feeder port extends along a central axis from a first end at the flow passage to a second end at the second end of the distributor and each feeder port comprises a first axial segment and a second axial segment, the first axial segment being connected between the flow passage and the second axial segment and the second axial segment being connected between the first axial segment and the second end of the distributor. 1. A distributor assembly , comprising: a flow passage extending from the first end of the distributor and a plurality of feeder ports extending from the second end of the distributor to the flow passage, each feeder port being in fluid communication with the flow passage;', 'wherein each feeder port extends along a central axis from a first end at the flow passage to a second end at the second end of the distributor; and', 'wherein each feeder port comprises a first axial segment and a second axial segment, the first axial segment being connected between the flow passage and the second axial segment and the second axial segment being connected between the first axial segment and the second end of the distributor., 'a distributor extending along a central axis between a first end and a second end opposite the first end, the distributor comprising2. The distributor assembly according to claim 1 , wherein the plurality of feeder ports are located in a substantially evenly distributed angular array.3. The distributor assembly according to claim 1 , wherein a diameter of the first axial segment is less than a diameter of the second axial segment.4. The distributor ...

Heat Exchanger With Subcooling Circuit

An air handling unit has a blower configured to selectively move air from an air inlet of the air handling unit to an air outlet of the air handling unit along an airflow direction extending from the blower to the air outlet, a heat exchanger disposed within the air handling unit between the inlet and the outlet, the heat exchanger has a thermal conductor, an evaporator tube thermally conductively joined to the thermal conductor, and a subcooler tube thermally conductively joined to the thermal conductor. An expansion device provides fluid communication between the evaporator tube and the subcooler tube and a drain pan disposed within the air handling unit upstream relative to the at least one subcooler tube and positioned in a geometrical footprint of at least a portion of the drain pan as the drain pan is viewed from an upstream position in the airflow direction. 1. An air handling unit , comprising:a blower configured to selectively move air from an air inlet of the air handling unit to an air outlet of the air handling unit along an airflow direction extending from the blower to the air outlet; a thermal conductor;', 'at least one evaporator tube thermally conductively joined to the thermal conductor; and', 'at least one subcooler tube thermally conductively joined to the thermal conductor;, 'a heat exchanger disposed within the air handling unit between the inlet and the outlet, the heat exchanger comprisingan expansion device providing fluid communication between the at least one evaporator tube and the at least one subcooler tube; anda drain pan disposed within the air handling unit upstream relative to the at least one subcooler tube and positioned in a geometrical footprint of at least a portion of the drain pan as the drain pan is viewed from an upstream position in the airflow direction.2. The air handling unit of claim 1 , wherein the drain pan comprises a concavity configured to receive condensate from the heat exchanger when the concavity is generally ...

RETURN FAN CONTROL SYSTEM AND METHOD

A return fan control system for an HVAC system comprises a supply fan control loop, a return fan control loop and a building pressure control system. The supply fan control loop comprises a duct pressure controller arranged to control a supply fan to a duct pressure setpoint. The return plenum pressure control loop comprises a return plenum pressure controller arranged to automatically control a return fan to a return plenum pressure setpoint determined by a setpoint reset function. The building pressure control system is operable to control a building pressure. The building pressure control system may comprise a building pressure control loop and an outside air control loop cooperatively arranged to control an exhaust damper in response to an outside air intake. 1. A return fan control system for an HVAC system comprising:a. a supply fan control loop arranged to control a supply fan to a duct pressure setpoint;b. a return pressure control loop comprising a return fan controller arranged to automatically control a return fan to a return plenum pressure, the return plenum pressure being attained by varying a return plenum pressure setpoint with a setpoint reset function; andc. a building pressure control system operable to substantially attain a building pressure.2. The return fan control system of wherein the supply fan is a constant volume supply fan.3. The return fan control system of wherein the supply fan is a variable volume supply fan.4. The return fan control system of wherein the supply fan control loop further comprises a duct pressure controller claim 3 , the supply fan control loop arranged to control a supply fan to the duct pressure setpoint.5. The return fan control system of wherein the duct pressure controller comprises a proportional-integral feedback controller and the return pressure controller comprises a proportional-integral feedback controller.6. The return fan control system of wherein the building pressure control system comprises a building ...

Reversible Flow Electric Expansion Valve

An HVAC system includes an electronic expansion valve, a motor, an obturator connected to the motor, the obturator being selectively movable in response to operation of the motor, a removable seat selectively received within a complementary portion of the electronic expansion valve, the removable seat being selectively movable in response to operation of the motor.

INTERACTIVE HVAC SALES SYSTEMS

An interactive HVAC sales system is disclosed. The system includes a database storing manufacturer information and distributor/dealer information for a plurality of HVAC components and a server in communication with the database, a manufacturer computer, a distributor/dealer computer, and a sales representative computer via one or more networks. The system is operable to process input of subjective customer preference information and objective building information to identify a subset of a plurality of HVAC components conforming to the objective and the subjective information. The system is further operable to identify one or more saleable combinations of the subset of HVAC components meeting predetermined system certification standards and output information for each of the saleable combinations to a mobile computing device or sales representative computer. 1. An interactive HVAC sales system , comprising:a database including a non-transitory computer readable medium configured to store manufacturer information and distributor/dealer information for a plurality of HVAC components, the manufacturer information including manufacturer product specification information for the plurality of HVAC components, manufacturer pricing information for the plurality of HVAC components, manufacturer warranty information for the plurality of HVAC components, manufacturer sales contract term information for the plurality of HVAC components, and manufacturer product availability date information for the plurality of HVAC components, the distributor/dealer information including distributor/dealer pricing information for the plurality of HVAC components, distributor/dealer warranty information for the plurality of HVAC components, distributor/dealer sales contract term information for the for the plurality of HVAC components, and distributor/dealer product availability date information for the plurality of HVAC components; anda server in communication with the database, a manufacturer ...

Time Delay With Control Voltage Sensing

A method is provided for controlling operation of an air conditioning unit. The method comprises supplying line voltage to activate a motor configured to operate the air conditioning unit, and monitoring a supply of control voltage in order to control operation of the air conditioning unit, the supply of control voltage being derived from line voltage. In response to detecting a control voltage below a predetermined threshold and/or by a predetermined percentage, a time delay is initiated. The method further comprises deactivating the motor if a predetermined increase in control voltage is not detected before the time delay expires. 1. A heating , ventilating , and air conditioning (HVAC) system , comprising:a power source operable to supply line voltage for operating a motor;a transformer electrically coupled to the power source and operable to convert line voltage to control voltage used to selectively energize at least one switching element, the switching element electrically connecting the motor to line voltage when the switching element is energized;at least one sensor operable to monitor control voltage supplied from the transformer; anda controller operatively connected to the sensor and operable to control line voltage supplied to the motor via the switching element in accordance with control voltage supplied from the transformer, the controller being configured to initiate a time delay in response to the sensor detecting a reduction causing control voltage to decrease below a predetermined threshold and/or by a predetermined percentage,wherein the controller transmits a command to de-energize the switching element in order to discontinue operation of the motor if the sensor does not detect a predetermined increase in control voltage before the time delay expires.2. The HVAC system of claim 1 , wherein the time delay comprises an interval between 3 to 5 line cycles.3. The HVAC system of claim 1 , wherein the time delay is less than or equal to 50 ...

HIGH PRESSURE SEAL VENT

A compressor for compressing refrigerant in a refrigerant circuit includes a housing defining a compression chamber. A screw rotor is mounted within the housing and configured to form a pocket of high pressure refrigerant and a pocket of low pressure refrigerant within the compression chamber. The screw rotor has a rotor shaft rotating about an axis. A bearing cavity includes at least one bearing rotatably supporting the rotor shaft. A partition through which the rotor shaft extends separates the bearing cavity from the compression chamber. A contacting seal is sealingly engaged with the rotor shaft and disposed in the bearing cavity proximate the partition. A passage has an opening adjacent the rotor shaft between the contacting seal and the compression chamber and in fluid communication with the pocket of low pressure refrigerant. 1. A compressor for compressing refrigerant in a refrigerant circuit , the compressor comprising:a housing defining a compression chamber;a screw rotor mounted within the housing and configured to form a pocket of high pressure refrigerant and a pocket of low pressure refrigerant within the compression chamber, the screw rotor having a rotor shaft rotating about an axis;a bearing cavity including at least one bearing rotatably supporting the rotor shaft;a partition separating the bearing cavity from the compression chamber and through which the rotor shaft extends;a contacting seal sealingly engaged with the rotor shaft and disposed in the bearing cavity proximate the partition; anda passage having an opening adjacent the rotor shaft between the contacting seal and the compression chamber and in fluid communication with the pocket of low pressure refrigerant.2. The compressor of claim 1 , wherein the contacting seal is a contacting lip seal.3. The compressor of claim 1 , wherein a portion of the passage is external to the housing.4. The compressor of claim 3 , wherein the compression chamber has an axial length claim 3 , and wherein the ...

Fuel Cell Heat Pump

A heating, ventilation, and air conditioning (HVAC) system includes a fuel cell configured to generate electricity and rejected heat, a hydronic coil, and a circulatory loop configured to selectively circulate a fluid between the fuel cell and the hydronic coil. 1. A method of operating a heating , ventilation , and air conditioning (HVAC) system , comprising:operating a fuel cell to generate electricity and rejected heat;powering a component of the HVAC system using the electricity; andheating air that is handled by the HVAC system using at least a portion of the rejected heat.2. The method of claim 1 , wherein the electricity powers a compressor of the HVAC system.3. The method according to claim 1 , further comprising:directing at least a portion of the rejected heat to a hydronics coil of the HVAC system.4. The method according to claim 1 , further comprising:directing at least a portion of the rejected heat to a domestic water heater.5. The method according to claim 1 , further comprising:directing at least a portion of the rejected heat to at least one of a hydronics coil of the HVAC system and a domestic water heater via a circulatory loop.6. The method according to claim 1 , further comprising:directing at least a portion of the rejected heat to at least one of a hydronics coil of the HVAC system and a domestic water heater in response to a comparison between a fluid temperature setpoint and a temperature of a fluid receiving the rejected heat.7. A method of operating a heating claim 1 , ventilation claim 1 , and air conditioning (HVAC) system claim 1 , comprising:circulating a fluid in a circulatory loop between a fuel cell of the HVAC system and a hydronics coil of the HVAC system;adding heat to the fluid at the fuel cell;removing heat from the fluid at the hydronics coil.8. The method according to claim 7 , further comprising:electrically powering at least a portion of the HVAC system using electrical energy generated by the fuel cell.9. The method ...

Power-Sensing Circuit for Wireless Zone Sensors

A system and method for controlling a heating, ventilating, and air conditioning (HVAC) system in a dwelling is provided. The system includes a plurality of wireless thermostats disposed throughout multiple zones within the dwelling and operable to control climate conditions in the corresponding zones. The system further includes a primary power source operable to supply power to thermostats for operating in a high-power mode when operatively connected thereto. The thermostats each include a secondary power source operable to supply power to the thermostats for operating in a low-power mode when the corresponding thermostat is not powered by the primary power source. Thermostats operating in the high-powered mode and are operable to receive and repeat signals originating from one or more thermostats operating in the low-power mode. 1. A heating , ventilating , and air conditioning (HVAC) system for controlling climate conditions in a dwelling including a plurality of zones , the system comprising:a plurality of wireless thermostats disposed throughout the plurality of zones within the dwelling, each thermostat being operable to control a climate condition in a corresponding zone, the corresponding zone being selected from the plurality of zones;a master control unit communicatively linked to the plurality of wireless thermostats and operable to receive a plurality of signals therefrom, the plurality of signals being communicated through a network associated with the system;a primary power source linked to the master control unit and operable to supply power to each thermostat operatively connected thereto, wherein each thermostat powered by the primary power source is operable to operate in a high-power mode,wherein each thermostat includes a corresponding secondary power source operable to supply power for operating in a low-power mode,wherein each thermostat not powered by the primary power source is powered by the corresponding secondary power source, andwherein ...

System and Method for HVAC Condensate Management

A HVAC system includes a cabinet configured as a duct, a coil assembly disposed within the cabinet, and at least one barrier configured to substantially segregate a low pressure zone associated with a downstream side of a heat exchanger of the coil assembly from a high pressure zone, wherein a leakage path is provided between the high pressure zone and the low pressure zone. 1. An HVAC coil assembly , comprising:a V-shaped heat exchanger comprising two coil slabs; andat least one of (1) a slab cap covering at least a portion of an end of at least one of the coil slabs to prevent airflow therethrough and (2) a disturber associated with an end of at least one of the coil slabs to locally reduce a velocity of an airflow adjacent the end of the at least one coil slab.2. The HVAC coil assembly of claim 1 , wherein the slab cap entirely covers the at least one end.3. The HVAC coil assembly of claim 1 , wherein the disturber is associated with an inner facing side of the at least one coil slab.4. The HVAC coil assembly of claim 1 , wherein the disturber comprises an undulating profile.5. The HVAC coil assembly of claim 1 , wherein the disturber comprises a saw tooth profile.6. The HVAC coil assembly of claim 1 , wherein the disturber is connected to the slab cap.7. A method of managing HVAC condensate claim 1 , comprising:providing a cabinet configured as a duct;providing a coil assembly within the cabinet;substantially segregating a low pressure zone associated with a primary airflow through the cabinet from at least one high pressure zone; andproviding an air leakage path between the low pressure zone and the high pressure zone to allow airflow from the high pressure zone to the low pressure zone to prevent condensation from leaking from the low pressure zone to the high pressure zone.8. The method of claim 7 , wherein the coil assembly comprises a V-shaped coil.9. The method of claim 7 , wherein the high pressure zone is located between the coil assembly and the cabinet ...

Systems and Methods for Estimating HVAC Operation Cost

A method of estimating a cost of operating a heating, ventilation, and/or air conditioning (HVAC) system includes receiving HVAC system information, generating at least one of an HVAC system energy consumption estimate and an HVAC system operation cost estimate as a function of the HVAC system information and a thermodynamic model of at least a portion of the HVAC system, and presenting at least one of the HVAC system energy consumption estimate and the HVAC system operation cost estimate. 1. A method of estimating a cost of operating a heating , ventilation , and/or air conditioning (HVAC) system , comprising:receiving HVAC system information;generating at least one of an HVAC system energy consumption estimate and an HVAC system operation cost estimate as a function of the HVAC system information and a thermodynamic model of at least a portion of the HVAC system; andpresenting at least one of the HVAC system energy consumption estimate and the HVAC system operation cost estimate.2. The method of claim 1 , wherein the receiving HVAC system information comprises providing the HVAC system information to a system controller of the HVAC system.3. The method of claim 1 , wherein the generating the at least one of the HVAC system energy consumption estimate and the HVAC system operation cost estimate comprises determining an instantaneous power consumption of the HVAC system.4. The method of claim 1 , wherein the presenting the at least one of the HVAC system energy consumption estimate and the HVAC system operation cost estimate comprises displaying the HVAC system operation cost estimate on a graphical user interface.5. The method of claim 1 , wherein the receiving the HVAC system information comprises providing the HVAC system information to a server located remote from the HVAC system.6. The method of claim 1 , wherein the generating the at least one of the HVAC system energy consumption estimate and the HVAC system operation cost is performed by a server located ...

ELECTRONICS COOLING USING LUBRICANT RETURN FOR A SHELL-AND-TUBE STYLE EVAPORATOR

A refrigeration system that induces lubricant-liquid refrigerant mixture flow from a flooded or falling film evaporator by means of the lubricant-liquid refrigerant mixture flow adsorbing heat from an electronic component. 1. A refrigeration system comprising:a compressor having a suction port and a discharge port, the compressor configured to receive refrigerant from the suction port, compress the refrigerant, and discharge the compressed refrigerant through the discharge port;a condenser connected to the discharge port and configured to receive the compressed refrigerant from the compressor and condense the compressed refrigerant;an expansion device connected to the condenser and configured to receive the condensed refrigerant from the condenser;a shell-and-tube style evaporator having an inlet port, a first outlet port, and a second outlet port, wherein the evaporator is configured to receive refrigerant from the expansion device through the inlet port, evaporate a portion of the refrigerant, and discharge the evaporated portion of the refrigerant through the first outlet port to the suction port, the second outlet being in fluid flow communication with a location in the shell-and-tube style evaporator to which lubricant migrates during operation of the refrigeration system, the migrated lubricant mixing with liquid refrigerant in the shell-and-tube style evaporator to form a lubricant-liquid refrigerant mixture;a heat sink;a lubricant return line connecting the second outlet port to the suction port, wherein the lubricant return line is in heat exchange relationship with the heat sink such that heat is rejected from the heat sink to the lubricant-liquid refrigerant mixture to cool the heat sink and to evaporate the liquid refrigerant in the lubricant-liquid refrigerant mixture to induce flow of the evaporated refrigerant and the lubricant in the lubricant-liquid refrigerant mixture to the compressor.2. The refrigeration system of wherein the heat sink cools an ...

Charge Port For Microchannel Heat Exchanger Systems

A low-volume vapor compression air conditioning system is provided. The system comprises a compressor, a condenser, low-pressure and high-pressure working fluid conduits, a pressure sensor, a temperature sensor, and a working fluid flow restrictor. The restrictor comprises a housing; a first end face and a second end face within the housing; a plug movable within a passage in communication between the first and second end faces; a seat in the housing between the plug and the second end face, wherein the seat and the plug are arranged such that, when the plug engages the seat, flow from the first end face to the end face is restricted. The restrictor is configured to control flow of working fluid in response to the measured temperature and pressure of the working fluid within the high pressure working fluid conduit. 1. A low-volume vapor compression air conditioning system , comprising:a compressor,a condenser,a low pressure working fluid conduit and a high pressure working fluid conduit connected to said system in a substantially closed circuit for conducting working fluid, the high pressure working fluid conduit being connected to a working fluid discharge of the condenser,a pressure sensor connected to the high pressure working fluid conduit, the pressure sensor being configured to measure a pressure of the working fluid within the high pressure working fluid conduit,a temperature sensor connected to the high pressure working fluid conduit, the temperature sensor being configured to measure a temperature of the working fluid within the high pressure working fluid conduit, and a housing;', 'a first end face and a second end face within the housing;', 'a plug movable within a passage in communication between the first and second end faces;', 'a seat in the housing between the plug and the second end face, wherein the seat and the plug are arranged such that when the plug engages the seat, flow from the first end face to the end face is restricted; and, 'a working ...

System and Method for Repairing Microchannel Heat Exchanger

A method of repairing a microchannel heat exchanger includes identifying a damaged region of a microchannel tube, providing sealant to at least one of the microchannel tube and a patch, and disposing the patch relative to the microchannel tube so that the sealant forms a fluid tight boundary between the microchannel tube and the patch, wherein the fluid tight boundary circumscribes the damaged region. 1. A method of repairing a microchannel heat exchanger , comprising:identifying a damaged region of a microchannel tube;providing sealant to at least one of the microchannel tube and a patch; anddisposing the patch relative to the microchannel tube so that the sealant forms a fluid tight boundary between the microchannel tube and the patch, wherein the fluid tight boundary circumscribes the damaged region;wherein the microchannel tube comprises a plurality of microchannels, and wherein the sealant is in contact with the patch and is in fluid communication with at least one of the microchannels of the microchannel tube.2. The method of claim 1 , further comprising:removing a fin from the microchannel tube.3. The method of claim 1 , further comprising:sanding at least a portion of at least one of the patch and the microchannel tube.4. The method of claim 1 , further comprising:brushing at least a portion of the microchannel tube.5. The method of claim 1 , further comprising:cleaning at least a portion of the microchannel tube with a cleaning pad pre-moistened with rubbing alcohol.6. The method of claim 1 , further comprising:substantially filling a recessed portion of the damaged region with the sealant.7. The method of claim 1 , further comprising:applying pressure to the microchannel tube via the patch and the sealant.8. The method of claim 1 , further comprising:applying heat to the sealant.9. The method of claim 1 , wherein the patch comprises substantially the same material as the microchannel tube.10. The method of claim 1 , wherein the patch extends over at least ...

REFRIGERATION SYSTEM WITH PURGE AND ACID FILTER

Refrigeration systems with a purge for removing non-condensables from the refrigerant and an acid filter for remove acid from the refrigerant are provided. The acid filter can be operatively connected to the purge. Optionally, the purge can include a separating device for separating non-condensable gases from condensable refrigerant gases and an acid filter is provided to remove acid from the condensable refrigerant gases. 1. A refrigeration system , comprising:a compressor;a condenser;an expansion device;an evaporator;the compressor, the condenser, the expansion device, and the evaporator are fluidly connected to form a refrigeration circuit;a purge fluidly connected to the condenser to receive a chiller refrigerant flowing through the refrigeration system from the condenser, the purge configured to remove one or more non-condensable gases from the chiller refrigerant; andan acid filter operatively connected to the purge, the acid filter configured to remove one or more acids from the chiller refrigerant.2. The refrigeration system of claim 1 , further comprising a separation device operatively connected to the purge at a downstream position of the purge claim 1 , the separation device configured to receive a mixture from the purge and separate the non-condensable gases and the chiller refrigerant from the mixture.3. The refrigeration system of claim 2 , wherein the acid filter is fluidly connected to an outlet of the separation device and configured to receive at least one of the non-condensable gases and the chiller refrigerant from the separation device and remove the acids from the chiller refrigerant and the non-condensable gases.4. The refrigeration system of claim 2 , wherein the acid filter is fluidly connected to an inlet of the separation device.5. The refrigeration system of claim 1 , wherein the acid filter is disposed within the purge.6. The refrigeration system of claim 2 , wherein the acid filter is disposed within the separation device.7. The ...

REFRIGERATION SYSTEM WITH PURGE USING ENRIVONMENTALLY-SUITABLE CHILLER REFRIGERANT

Refrigeration systems with a purge for removing non-condensables from an environmentally-suitable chiller refrigerant are provided. The refrigeration systems utilize an environmentally-suitable chiller refrigerant with a 100 year direct global warming potential (GWP) of less than 150. The refrigeration systems further include a remover to remove refrigerant-harmful gases from the chiller refrigerant. 1. A refrigeration system , comprising:a compressor;a condenser;an expansion device;an evaporator;the compressor, the condenser, the expansion device, and the evaporator are fluidly connected to form a refrigeration circuit; anda purge fluidly connected to the condenser to receive a chiller refrigerant flowing through the refrigeration system from the condenser, the purge configured to remove non-condensable gases from the chiller refrigerant, and the chiller refrigerant including an environmentally-suitable chiller refrigerant that has a 100 year direct global warming potential (GWP) of less than 150.2. The refrigeration system of claim 1 , wherein the environmentally-suitable chiller refrigerant has a composition comprising:at least one chemical of 1-chloro-3,3,3 trifluoropropene (E), 1-chloro-3,3,3 trifluoropropene (Z), 2-chloro-3,3,3 trifluoropropene, 1,1,dichloro-3,3,3 trifluoropropene, 1,3,3,3 tetrafluoropropene (E), 1,3,3,3 tetrafluoropropene (Z), 1,2 dichloro-3,3,3 trifluoropropene (E), 1,2 dichloro-3,3,3 trifluoropropene (Z), 1,1,3 trichloro-3,3,3 trifluoropropene, 1,2 dichloroethylene (E), 1,2 dichloroethylene (Z), 1,1 dichloroethylene, 1,1,1,4,4,4 hexafluorobutene (Z), 1,1,1,4,4,4 hexafluorobutene (E), 1,1,1,2,3 pentafluoropropane, 1,1,1,3,3 pentafluoropropane, Isopentane, and Pentane.3. The refrigeration system of claim 2 , wherein the amount of the chemical in the environmentally-suitable chiller refrigerant is in a range of about 40% to about 100% by weight.4. The refrigeration system of claim 1 , wherein the chiller refrigerant further comprises at least ...

Electric Expansion Valve

An HVAC system has an electronic expansion valve that has a valve body comprising a first motor component and a coil assembly comprising a plurality of stator bars, the plurality of stator bars being sealed from a surrounding environment by at least one fluid tight barrier at least partially disposed between the valve body and the plurality of stator bars. 1. An HVAC system , comprising: a valve body comprising a first motor component;', 'a coil assembly comprising a plurality of stator bars, the plurality of stator bars being sealed from a surrounding environment by at least one fluid tight barrier at least partially disposed between the valve body and the plurality of stator bars., 'an electronic expansion valve, comprising2. The HVAC system of claim 1 , wherein the stator bars comprise galvanized steel.3. The HVAC system of claim 1 , wherein the fluid tight barrier comprises PolyPhenylene Ether.4. The HVAC system of claim 1 , wherein the fluid tight barrier comprises a phenol material.5. The HVAC system of claim 1 , the at least one fluid tight barrier comprises a plurality of patches of a coating.6. The HVAC system of claim 1 , wherein the fluid tight barrier comprises a substantially constant diameter along a length of the coil assembly.7. The HVAC system of claim 1 , wherein the fluid tight barrier comprises a material different than another material that contacts the plurality of stator bars.8. The HVAC system of claim 1 , wherein the plurality of stator bars are entirely encased within the fluid tight barrier.9. The HVAC system of claim 1 , wherein the fluid tight barrier is configured to reduce oxidation of the plurality of stator bars as a result of exposure to air of a surrounding environment.10. The HVAC system of claim 1 , wherein the HVAC system comprises a heat pump system and a plurality of the electronic expansion valves.11. An electronically controlled expansion valve claim 1 , comprising:a generally cylindrical valve body comprising a valve body ...

System and Method of Charge Management

A heat exchanger has an upper region, a lower region disposed vertically lower than the upper region, and a passive charge management device. The passive charge management device has an internal volume, an upper tube connecting the internal volume to at least one of the upper region and the lower region at a first vertical height, and a lower tube connecting the internal volume to at least one of the upper region and the lower region at a second vertical height that is vertically lower than the first vertical height. 1. A heat exchanger , comprising:a upper region;a lower region disposed vertically lower than the upper region; and an internal volume;', 'an upper tube connecting the internal volume to at least one of the upper region and the lower region at a first vertical height; and', 'a lower tube connecting the internal volume to at least one of the upper region and the lower region at a second vertical height that is vertically lower than the first vertical height., 'a passive charge management device comprising2. The heat exchanger of claim 1 , further comprising:a microchannel tube extending through at least one of the upper region and the lower region.3. The heat exchanger of claim 1 , wherein the heat exchanger comprises a divided header and an undivided header.4. The heat exchanger of claim 1 , wherein the first vertical height is at least partially vertically aligned with the upper region.5. The heat exchanger of claim 1 , wherein the second vertical height is at least partially vertically aligned with the lower region.6. The heat exchanger of claim 1 , wherein the upper tube is in direct fluid communication with the upper region and wherein the lower tube is in direct fluid communication with the lower region.7. The heat exchanger of claim 1 , wherein the passive charge management device comprises a reservoir that provides a majority of the internal volume of the passive charge management device and wherein the upper tube and the lower tube are in fluid ...

Blower Housing

A blower housing has a discharge direction, an axis of rotation, a polar axis that intersects the axis of rotation and is substantially perpendicular to the discharge direction, and an angular sweep of increasing fluid flow area. The fluid flow area, A, increases with increasing angular magnitude, Φ, as a function comprising at least a functional component that is at least one of (1) equal to, (2) substantially mathematically reducible to, and (3) substantially mathematically analogous to the equation, 2. The blower housing of claim 1 , wherein the angular sweep extends over about 300 degrees.3. The blower housing of claim 1 , wherein the angular sweep begins at about 90 degrees as measured from the polar axis.4. The blower housing of claim 1 , wherein the angular sweep ends at about 365 degrees as measured from the polar axis.5. The blower housing of claim 1 , wherein the fluid flow area comprises a cross-sectional area measured between the axis of rotation and an inner wall of the blower housing.6. The blower housing of claim 1 , wherein the fluid flow area is increased by increasing a distance between the axis of rotation and a radial wall of the blower housing.7. The blower housing of claim 1 , wherein the fluid flow area is increased by axially expanding a sidewall of the blower housing.8. The blower housing of claim 1 , wherein the housing comprises an axial contraction between the angular sweep and a discharge of the blower housing.9. The blower housing of claim 1 , wherein the angular sweep extends to a discharge of the blower housing.10. The blower housing of claim 1 , wherein the angular sweep is angularly separated from each of a cutoff of the blower housing and a discharge of the blower housing.12. The method of claim 11 , wherein the angular path of increasing fluid flow area comprises about 300 degrees.13. The method of claim 11 , further comprising discharging the fluid in an airflow direction that is substantially tangential to an axis of rotation of ...

Systems and Methods for Controlling an HVAC Motor

A heating, ventilation, and/or air conditioning (HVAC) system has a motor configured to selectively provide an airflow, an airflow control algorithm configured receive an input and to provide a desired control value associated with a desired actual operation value of the motor, wherein the desired actual operation value is provided as a function of the input, and a control translator configured to receive the desired control value and to provide a correlated control value to the motor, wherein the correlated control value is associated with causing the motor to operate at the desired control value. 1. A heating , ventilation , and/or air conditioning (HVAC) system , comprising:a motor configured to selectively provide an airflow;an airflow control algorithm configured receive an input and to provide a desired control value associated with a desired actual operation value of the motor, wherein the desired actual operation value is provided as a function of the input; anda control translator configured to receive the desired control value and to provide a correlated control value to the motor, wherein the correlated control value is associated with causing the motor to operate at the desired control value.2. The HVAC system of claim 1 , wherein the motor comprises a fan motor of an indoor unit of an HVAC system.3. The HVAC system of claim 1 , wherein the input comprises at least one of a desired temperature setting claim 1 , a desired airflow rate claim 1 , a desired relative humidity claim 1 , a desired rotational speed of the motor claim 1 , and a desired mechanical torque of the motor.4. The HVAC system of claim 1 , wherein the desired control value is not equal to the correlated control value.5. The HVAC system of claim 1 , the control translator comprising:data correlating a set of correlated control values to a set of actual operation values of the motor.6. The HVAC system of claim 5 , wherein the data comprises data obtained from testing the motor using a ...

HVAC Furnace

A heating, ventilation, and/or air conditioning (HVAC) furnace has a flat burner comprising an upstream side and a downstream side, the flat burner being configured to receive an air-fuel mixture therethrough, a first flow path located adjacent the flat burner and downstream relative to the flat burner, the first flow path configured to receive fluid exiting the flat burner, and a plurality of second flow paths located downstream relative to the first flow path, the plurality of second flow paths being configured to receive fluid from the first flow path. 1. A heating , ventilation , and/or air conditioning (HVAC) furnace , comprising:a flat burner comprising an upstream side and a downstream side, the flat burner being configured to receive an air-fuel mixture therethrough;a first flow path located adjacent the flat burner and downstream relative to the flat burner, the first flow path configured to receive fluid exiting the flat burner; anda plurality of second flow paths located downstream relative to the first flow path, the plurality of second flow paths being configured to receive fluid from the first flow path.2. The furnace of claim 1 , further comprising:a third flow path located downstream relative to the plurality of second flow paths, the third flow path being configured to receive fluid from the plurality of second flow paths.3. The furnace of claim 1 , further comprising:an inducer blower located downstream relative to the flat burner, the inducer being configured to selectively pull the air-fuel mixture through the flat burner.4. The furnace of claim 1 , wherein the flat burner comprises a woven material configured to be selectively permeated by the air-fuel mixture.5. The furnace of claim 1 , further comprising:a first heat exchanger that substantially defines the bounds of at least one of the plurality of second flow paths.6. The furnace of claim 5 , further comprising:a second heat exchanger disposed downstream relative to the first heat exchanger, ...

Combined Heat and Power Heat Pump

A method of operating a heating, ventilation, and/or air conditioning (HVAC) system includes operating a device to produce at least one of electricity and rejected heat and at least one of (1) powering a component of the HVAC system using the electricity produced by the electricity generating device and (2) heating the refrigerant of the HVAC system using at least a portion of the rejected heat. 1. A method of operating a heating , ventilation , and/or air conditioning (HVAC) system , comprising:operating a device to produce at least one of electricity and rejected heat; andat least one of (1) powering a component of the HVAC system using the electricity produced by the electricity generating device and (2) heating the refrigerant of the HVAC system using at least a portion of the rejected heat.2. The method of claim 1 , wherein the device is an electrical generator comprising an internal combustion engine.3. The method of claim 1 , wherein the electricity powers a compressor of the HVAC system.4. The method according to claim 1 , further comprising:directing at least a portion of the rejected heat to a recovery heat exchanger of the HVAC system, the recovery heat exchanger being configured to transfer heat to the refrigerant.5. The method according to claim 1 , further comprising:directing at least a portion of the rejected heat to a discharge heat exchanger of the HVAC system, the discharge heat exchanger being configured to transfer heat to an ambient zone.6. The method according to claim 1 , further comprising:directing at least a portion of the rejected heat to at least one of a recovery heat exchanger and a discharge heat exchanger of the HVAC system via fluid within a circulatory loop.7. The method according to claim 1 , further comprising:returning at least a portion of the rejected heat back to the device.8. The method according to claim 1 , further comprising:directing at least a portion of the rejected heat back to the device in response to a comparison ...

Furnace Header

A furnace having a first drain trap, a first drain outlet associated with the first drain trap, and a second drain outlet associated with the first drain trap, wherein the first drain outlet and the second drain outlet are located relative to the first drain trap so that gravity driven drainage of a liquid from the first drain trap is selectable between the first drain outlet and the second drain outlet in response to a rotation of the furnace. 1. A furnace , comprising:a first drain trap;a first drain outlet associated with the first drain trap; anda second drain outlet associated with the first drain trap;wherein the first drain outlet and the second drain outlet are located relative to the first drain trap so that gravity driven drainage of a liquid from the first drain trap is selectable between the first drain outlet and the second drain outlet in response to a rotation of the furnace.2. The furnace of claim 1 , wherein each of the first drain trap claim 1 , the first drain outlet claim 1 , and the second drain outlet are substantially fixed relative to each other.3. The furnace of claim 1 , further comprising:a cold header comprising each of the first drain trap, the first drain outlet, and the second drain outlet.4. The furnace of claim 1 , wherein the rotation comprises rotating the furnace 90 degrees.5. The furnace of claim 1 , wherein the first drain outlet and the second drain outlet are substantially equal in size.6. The furnace of claim 1 , further comprising:a second drain trap;a third drain outlet associated with the second drain trap; anda fourth drain outlet associated with the second drain trap.7. The furnace of claim 6 , wherein the third drain outlet and the fourth drain outlet are located relative to the second drain trap so that gravity driven drainage of a liquid from the second drain trap is selectable between the third drain outlet and the fourth drain outlet in response to a rotation of the furnace.8. The furnace of claim 6 , further ...

SOUND ENCLOSURE FOR A COMPRESSOR

A sound enclosure of a compressor to attenuate an operational sound level of the compressor is disclosed. The sound enclosure may be configured to generally enclose the compressor and attenuate radiantly emitted sound by the compressor. The sound enclosure may be configured to include a plurality of assembly sections, particularly two side sections and one bottom section, where the two side sections can be joined together like two halves of a clam shell and joined to the bottom section to facilitate easy assembly. The sound enclosure may form openings at longitudinal ends of the sound enclosure to accommodate refrigerant lines. The assembly sections of the sound enclosure may include one or more openings to accommodate a compressor junction box, wire bundles, oil lines, mounting mechanisms, etc. 1. A sound enclosure for a compressor of a HVAC system comprising:a first side section and a second side section; anda bottom section;wherein the sound enclosure is configured to enclose a compressor of the HVAC system in a longitudinal direction and impede operational sound emitted radiantly by the compressor,the first side section, the second side section and the bottom section form one end opening in the longitudinal direction that is configured to allow a refrigerant line access to the enclosed compressor,the bottom section includes a plurality of apertures to accommodate a mounting mechanism for the compressor of the HVAC system,the first side section and the second side section, the first side section and the bottom section, and the second side section and the bottom section have overlap sections, and the first section and the second side section, the first side section and the bottom section, and the second side section and the bottom section are joined together at the overlap sections,and the sound enclosure is configured to create a space between the first and second side sections and the compressor when the compressor is inside the sound enclosure.2. The sound ...

MOBILE DEVICE WITH GRAPHICAL USER INTERFACE FOR REMOTELY DETECTING AND CONNECTING TO A BUILDING AUTOMATION SYSTEM

A mobile device with a graphical user interface (GUI) for remotely detecting and/or connecting to a configurable building automation systems (BAS). In particular, GUI of the mobile device provides a user to connect quickly to a detected and/or known BAS, for monitoring and/or interacting with the BAS. 1. A mobile device for remotely interacting with a building automation system , comprising:a processor in communication with a memory, a network interface, and a touchscreen;the processor can execute instructions for a graphical user interface and display the graphical user interface on the touchscreen,the network interface can receive data from the building automation system in real time, the network interface can send the data to the processor, and the processor can display the data in a portion of the graphical user interface,the graphical user interface includes a plurality of icons, each of the icons is associated with a detected building automation system based on the data received by the network interface and/or a known building automation system based on saved data stored in the memory.2. The mobile device according to claim 1 , wherein the plurality of icons is displayed as a list in the graphical user interface.3. The mobile device according to claim 1 , wherein the graphical user interface is configured to receive a user selection of one of the building automation system networks via a touch of the touchscreen claim 1 , the user selection is communicated to the processor claim 1 , wherein the processor communicates to the selected one of the building automation system networks via the network interface to establish a network connection therewith.4. The mobile device according to claim 1 , wherein the graphical user interface allows a selection of one of the icons by touching the touchscreen claim 1 , which is detectable by the processor for sending authorization data stored in the memory to the building automation system via the network interface to remotely ...

MOBILE DEVICE WITH GRAPHICAL USER INTERFACE FOR MONITORING AN OPERATION SCHEDULE OF A BUILDING AUTOMATION SYSTEM

A mobile device with a graphical user interface for remotely monitoring and/or remotely interacting with a configurable building automation systems (BAS). In particular, the mobile device receives operation schedule data of the BAS from the BAS, the graphical user interface displays the operation schedule data on the mobile device, and the graphical user interface allows a user to monitor the operation schedule of the BAS. 1. A mobile device for remote operation of a building automation system , comprising:a processor in communication with a network interface and a touchscreen;the processor executing instructions for a graphical user interface and displaying the graphical user interface on the touchscreen,the graphical user interface is configured to receive operational instructions via the touchscreen, relay the operational instructions to the processor, the processor is configured to send the operational instructions to the building automation system via a transmission from the network interface,the graphical user interface includes a screen and a navigation bar, the navigation bar includes a plurality of icons, each of the icons is associated with an interactive screen, wherein a selection of one of the icons by touching the touchscreen is detectable by the processor to display on the touchscreen the interactive screen associated with the one of the icons, andthe interactive screen includes a scrollable time view, wherein a portion of the time view has a first operation data displayed in a first color.2. The mobile device according to claim 1 , wherein another portion of the time view has a second operation data displayed in a second color.3. A mobile device for remote operation of a building automation system claim 1 , comprising:a processor in communication with a network interface and a touchscreen,the processor executing instructions for a graphical user interface and displaying the graphical user interface on the touchscreen,the graphical user interface is ...

MOBILE DEVICE WITH GRAPHICAL USER INTERFACE FOR INTERACTING WITH A BUILDING AUTOMATION SYSTEM

A mobile device with a graphical user interface for remotely monitoring and/or remotely interacting with a configurable building automation systems (BAS). In particular, the mobile device's graphical user interface includes a screen portion and a navigation bar portion, wherein the navigation bar portion has plurality of icons, and each of the icons being associated with an interactive screen that can be displayed in the screen portion, one at a time. 1. A mobile device for remote operation of a building automation system , comprising:a processor in communication with a memory, a network interface, and a touchscreen;the processor executing instructions for a graphical user interface and displaying the graphical user interface on the touchscreen,the graphical user interface includes a screen and a navigation bar, the navigation bar includes a plurality of icons, each of the icons is associated with one of a plurality of interactive screens, wherein a selection of one of the icons by touching the touchscreen is detectable by the processor to display in the screen one of the interactive screens associated with the one of the icons selected, wherein only one of the interactive screens is displayed in the screen at a time.2. The mobile device according to claim 1 , wherein one of the interactive screens includes one or more additional icons claim 1 , wherein each of the additional icons is associated with one of additional interactive screens claim 1 ,a selection of one of the additional icons by touching the touchscreen is detectable by the processor to display in the screen one of the additional interactive screens associated with the one of the additional icons selected, in place of the one of the interactive screens that includes the one or more additional icons.3. The mobile device according to claim 1 , wherein the interactive screens includes one or more of status data of the building automation system in real time claim 1 , status history data of the building ...

MOBILE DEVICE WITH GRAPHICAL USER INTERFACE FOR MONITORING A BUILDING AUTOMATION SYSTEM

A mobile device with a graphical user interface (GUI) for remotely monitoring and/or remotely interacting with a configurable building automation systems (BAS). In particular, the mobile device receives status data from the BAS, the GUI displays the status data on the mobile device, and the GUI allows a user to interact with the BAS. 1. A mobile device for remote operation of a building automation system , comprising:a processor in communication with a network interface and a touchscreen;the network interface can receive data from the building automation system in real time, the network interface can send the data to the processor, and the processor can display the data in a portion of the graphical user interface;the processor executing instructions for a graphical user interface and displaying the graphical user interface on the touchscreen; andthe graphical user interface includes a screen and a navigation bar, the navigation bar includes a plurality of icons, each of the icons is associated with an interactive screen, wherein a selection of one of the icons by touching the touchscreen is detectable by the processor to display in the screen the interactive screen associated with the one of the icons,the graphical user interface is configured to receive user input data via the touchscreen, relay the user input data to the processor, the processor is configured to send the user input data to the building automation system via a transmission from the network interface.2. The mobile device according to claim 1 , wherein the network interface receives an alarm data from the building automation system in real time claim 1 , the network interface sends the alarm data to the processor claim 1 , and the processor displays receipt of the alarm data on the navigation bar of the graphical user interface.3. The mobile device according to claim 1 , wherein the network interface receives an alarm data from the building automation system in real time claim 1 , the network ...

MOBILE DEVICE WITH GRAPHICAL USER INTERFACE FOR MONITORING A BUILDING AUTOMATION SYSTEM

A mobile device with a graphical user interface for remotely monitoring and/or remotely interacting with a configurable building automation systems (BAS). In particular, the mobile device receives status data from the BAS, the graphical user interface displays the status data on the mobile device, and the graphical user interface allows a user to monitor any of the areas, including devices, associated with the BAS. 1. A mobile device for remote operation of a building automation system , comprising:a processor in communication with a memory, a network interface, and a touchscreen;the processor executing instructions for a graphical user interface and displaying the graphical user interface on the touchscreen,the graphical user interface includes a screen and a navigation bar, the navigation bar includes a plurality of icons, each of the icons is associated with an interactive screen, wherein a selection of one of the icons by touching the touchscreen is detectable by the processor to display in the screen the interactive screen associated with the one of the icons,the processor is configured to receive data in real time from the building automation system via the network interface, and determine whether the data received is associated with a listing of one or more preselected areas stored in the memory, andthe graphical user interface displays the listing of one or more preselected areas and the data associated with the one or more preselected areas in the interactive screen.2. The mobile device according to claim 1 , wherein the graphical user interface is configured to receive a user operation to add a new area to the listing of one or more preselected areas by touching the touchscreen claim 1 , the user operation is communicated to the processor to display in the screen the new area added to the listing of one or more preselected areas.3. The mobile device according to claim 1 , wherein the graphical user interface is configured to receive a user operation to add ...

MOBILE DEVICE WITH GRAPHICAL USER INTERFACE FOR INTERACTING WITH A BUILDING AUTOMATION SYSTEM

A mobile device with a graphical user interface for remotely monitoring and/or remotely interacting with a configurable building automation systems (BAS). In particular, the mobile device's graphical user interface that has a portrait mode and a landscape mode, and the graphical user interface is displayed on the touchscreen in the portrait mode or the landscape mode based on the orientation of the mobile device. 1. A mobile device for remote operation of a building automation system , comprising:a processor in communication with a memory, a network interface, a touchscreen, and an accelerometer that detects an orientation with respect to a gravitational center and communicates the orientation to the processor,the processor executing instructions read from the memory for a graphical user interface and displaying the graphical user interface on the touchscreen,the graphical user interface includes a portrait mode and a landscape mode, wherein the graphical user interface is displayed on the touchscreen in the portrait mode or the landscape mode based on the orientation,each of the portrait mode and the landscape mode of the graphical user interface includes a screen and a navigation bar,the navigation bar includes a plurality of icons, each of the icons is associated with an interactive screen, wherein a selection of one of the icons by touching the touchscreen is detectable by the processor to display in the screen the interactive screen associated with the one of the icons, andthe graphical user interface is configured to receive operational instructions via the touchscreen, relay the operational instructions to the processor, the processor is configured to send the operational instructions to the building automation system via a transmission from the network interface.2. The mobile device according to claim 1 , wherein the portrait mode of the GUI includes a screen having a longer length than width claim 1 , and the navigation bar includes five icons disposed ...

System and Method for Managing HVAC Excess Air Condition

A heating, ventilation, and/or air conditioning (HVAC) system includes a bypass duct configured to selectively receive a bypass airflow therethrough in response to a supply air pressure of the HVAC system and a supply air temperature of the HVAC system.

VARIABLE FAN SPEED CONTROL IN HVAC SYSTEMS AND METHODS

Generally, a variable fan speed control in an HVAC system is described. Such methods and systems to control fan speed can in turn improve efficiency of the HVAC system by minimizing power consumption, for example of the compressor. The control scheme is based on various operating conditions of compressor load and ambient air temperature, which are used to determine an optimum fan speed. 1. A method of controlling condenser fans in an HVAC system , comprising:detecting, with a device to detect ambient air temperature, ambient air temperature;obtaining, with a device to obtain compressor present load, a present load on a variable load compressor;determining, with a controller, a desired condenser fan capacity suitable to control one or more condenser fans based on the ambient air temperature detected and the present load on the variable load compressor obtained;outputting, with the controller, the desired condenser fan capacity suitable to control the one or more condenser fans; andcontrolling the one or more fans based on the output of the desired condenser fan capacity, such that the power of the HVAC system is managed through power consumed by the variable load compressor and the one or more condenser fans.2. The method of claim 1 , wherein the step of obtaining the present load comprises obtaining the present load on a variable speed compressor.3. The method of claim 1 , wherein the step of obtaining the present load comprises obtaining the present load through the device to obtain compressor present load which includes a speed sensor.4. The method of claim 1 , wherein the step of obtaining the present load comprises obtaining the present load through the device to obtain compressor present load which includes a mechanical unloader position sensor.5. The method of claim 1 , wherein the step of obtaining the present load comprises obtaining the present load by estimating a change in evaporator water temperature obtained through the device to obtain compressor ...

OCCUPANCY SENSING AND BUILDING CONTROL USING MOBILE DEVICES

Apparatus, systems and methods for ascertaining the occupancy of a building are presented. The building is divided into one or more control zones which correspond to physical areas of the building associated with controllable modules, such as HVAC units, lighting, irrigation, or other environmental features such as fountains, music, video, and the like. Zone parameters define how zone devices shall react to the number of occupants located in the particular zone. A building control system detects individual mobile devices in and around the building, and determines the locations of each device by using trilateration and/or location services. The identified mobile devices act as proxies for building occupants. The locations of these devices are correlated with the locations of the zones in the building, and the building control system then adjusts the operating parameters of the zone based on the number of devices present in the zone. 1. A building system controller for a building having at least one controllable device associated with a control zone and one or more communication access points configured to receive an electromagnetic signal having a unique identifier of a mobile device , comprising:a map of the building defining one or more control zones and indicating the location of each access point;a location module configured to process the electromagnetic signal received by the one or more communication access points to determine the location of the mobile device;an occupancy module configured to determine the number of mobile devices located within each of the control zones; anda rules processor having a control output configured to control a controllable device of a control zone in response to, at least in part, the number of mobile devices located within the control zone.2. The building system controller in accordance with claim 1 , wherein the rules processor includes a comparator which compares the number of mobile devices located within the control zone to ...

HVAC SYSTEM CONFIGURATION AND ZONE MANAGEMENT

Systems and methods for HVAC system design and zone group management are disclosed. A floor plan of a building is received, and an HVAC system configuration is selected from among a set of template HVAC configurations. HVAC components are selected from set of template HVAC components to customize the configuration. As components are selected, candidate positions for the HVAC component within the HVAC system configuration are determined and presented to a user to ensure compliance with engineering requirements. The floor plan includes a mapping of an HVAC system configuration to an HVAC zone group. If a change is made to the HVAC system configuration of a zone associated with a zone group, it is determined if another zone group shares the same properties as the changed HVAC configuration. If one exists, the changes]d zone is moved to the new zone group. If not, a new zone group is created and the changes zone is moved to the new zone group. 119-. (canceled)20. A device for constructing an HVAC system for a structure having distinct thermal zones , comprising:a processor; and define the structure;', 'define an HVAC topology included in the structure;', 'identify common elements of the HVAC topology associated with a distinct thermal zone;', 'define a zone group comprising distinct zones sharing a common element;', 'modify membership of the zone group in response to a determination that a first zone of the zone group no longer shares the common element with a second zone of the zone group; and', 'determine a different common element shared by the first zone., 'a memory operatively coupled to the processor and storing instructions, which, when executed by the processor, cause the device to21. The device in accordance with claim 20 , wherein the memory further stores instructions claim 20 , which claim 20 , when executed by the processor claim 20 , cause the device to define one or more HVAC components included in the structure.22. The device in accordance with claim 20 ...

Active Device Management for Use in a Building Automation System

A building automation system (BAS) comprising a plurality of end devices, at least one communication network, and a server engine comprising a communication state manager for actively managing the state of various devices in building automation system and an associated reconnect manager to reestablish communication with off-line devices. The communication manager and the reconnect manager coordinate the interaction between the server engine and the devices in order to minimizing the load on the communication network, while also working to establish the working state of any of the end devices and to transition off-line to an on-line state.

HARMONIC SHUNTING ELECTRIC MOTOR WITH FACETED SHAFT FOR IMPROVED TORQUE TRANSMISSION

Disclosed are an electric motor and a simplified variable speed drive system which renders the use of filtering components in a motor drive circuit unnecessary and increases torque transfer from permanent magnets of the rotor to the output shaft. The motor includes a fluid gap between the rotor and the stator configured to receive a cooling fluid, such a refrigerant. A plurality of radially-abutting, bread loaf-shaped magnets having a flat base are respectively fixed to a plurality of longitudinally oriented mounting facets provided on the shaft to provide maximum torque transfer from the magnets to the shaft. An eddy shield disposed between the faceted shaft and the magnets thermally shunts high frequency harmonics from the magnets to the shaft and cooling fluid. The rotor components are mechanically secured by a sleeve disposed around the rotor. 1. A hermetic AC electric motor comprising harmonics shunting such that high frequency harmonics can be shunted from the AC electric motor without the use of one or more filters , comprising:a stator; a shaft;', 'a plurality of longitudinal facets defined on the shaft;', 'an eddy current shield disposed around the longitudinal facets; and', 'a rotor element disposed on a longitudinal facet., 'a rotor disposed within the stator and in selective magnetic communication with the stator, wherein a fluid gap exists between the rotor and the stator, wherein the fluid gap is configured to receive a cooling fluid, comprising2. The motor in accordance with claim 1 , wherein the rotor element is selected from the group consisting of a magnet and a spacer.3. The motor in accordance with claim 2 , wherein the magnet is a permanent magnet.4. The motor in accordance with claim 2 , wherein the spacer formed from non-magnetic material.5. The motor in accordance with claim 1 , wherein the rotor element comprises:a flat base surface dimensioned to mate with a longitudinal facet of the shaft; anda curved top surface.6. The motor in accordance ...

HVAC System with Location Based Operation

A heating, ventilation, and/or air conditioning (HVAC) system includes a system controller having a location determination module configured to cause determination and/or reporting of the location of the HVAC system in response to a first run and/or initialization of the HVAC system. The location determination module may determine and/or report location information via global positioning system (GPS) capability, a service provider (SP), customized data provider (CDP), Internet sites, LAN, WAN, 3G, 4G, and/or any other type of network infrastructure to effect reporting of the location of the HVAC system. The system controller may select a climate-based operation parameter value for the HVAC system as a function of a geographic location of the HVAC system.

PROBABILITY-BASED NETWORK DATA UPDATES

A data system controller can include one or more application modules configured to receive data from one or more devices, and a data service module in operative communication with the one or more application modules to provide data thereto. The data service module can be configured to receive data from the one or more devices. The data service module can be configured to update data from a respective device of the one or more devices when a data change probability of the respective device is above a probability threshold to provide updated data from the respective device to the one or more application modules. 1. A data system controller , comprising:one or more application modules configured to receive data from one or more devices, wherein the one or more applications modules represent one or more applications being executed by a processor of the data system controller and the one or more devices represent one or more sensors communicatively coupled to the data system controller via a communication link having a maximum bandwidth;a data service module, indicative of a service application being executed by the data system controller, in operative communication with the one or more application modules to provide data thereto, wherein the data service module is configured to request data from the one or more devices via the communication link, wherein, in response to a determination that the maximum bandwidth supported by the communication link is below a defined threshold, the data service module requests data updates from a respective device of the one or more devices when a data change probability of the requested data from the respective device is above a probability threshold to provide updated data of the respective device to the one or more application modules.2. The controller of claim 1 , wherein the data service module is configured to not update the data from the respective device and to provide stored data to the one or more application modules when the ...

Systems and methods for indoor air quality based on dynamic people modeling to simulate or monitor airflow impact on pathogen spread in an indoor space and to model an indoor space with pathogen killing technology, and systems and methods to control administration of a pathogen killing technology

Described herein are heating, ventilation, air conditioning, and refrigeration (HVACR) systems and methods directed to indoor air quality. HVACR systems and methods are based on dynamic people modeling to simulate and/or to monitor airflow impact on pathogen spread in an indoor space. HVACR systems and methods model an indoor space with pathogen killing technology to deploy the pathogen killing technology. HVACR systems and methods are directed to control administration of a pathogen killing technology to an indoor space based on factors that impact airflow including from dynamic analytics, a known input, and/or detection.

ENERGY MANAGEMENT FOR SENSORS

The present disclosure is directed to a method for reducing power consumption of a sensor. The method includes determining if a predetermined condition has been met to change at least one of a sensing rate or a sensor resolution, and changing at least one of the sensing rate or sensor resolution if it is determined that the predetermined condition has been met. 1. A method for reducing power consumption of a sensor , comprising:determining if a predetermined condition has been met to change at least one of a sensing rate or a sensor resolution; andchanging at least one of the sensing rate or sensor resolution if it is determined that the predetermined condition has been met.2. The method of claim 1 , further comprising sensing a monitored gas in a local atmosphere.3. The method of claim 2 , wherein sensing the amount of the monitored gas includes sensing at least one of ethylene claim 2 , CO claim 2 , methane claim 2 , O claim 2 , HS claim 2 , and/or CO.4. The method of claim 2 , wherein determining if the predetermined condition has been met includes determining an amount and/or a proportion of the monitored gas in the local atmosphere.5. The method of claim 3 , wherein determining if the predetermined condition has been met includes determining a rate of change of the amount and/or a proportion of the monitored gas over a time.6. The method of claim 5 , wherein determining if the predetermined condition has been met includes comparing the rate of change of the amount and/or a proportion of the monitored gas to a threshold rate of change to determine whether to change the sensing rate or sensor resolution.7. The method of claim 2 , wherein determining if the predetermined condition has been met includes determining an occupancy state of a building.8. The method of claim 7 , wherein determining the occupancy state includes referencing a predetermined schedule and comparing a local clock to the predetermined schedule to determine the occupancy state of the building.9 ...

Variable economizer injection position

A compressor includes a bore, a rotor disposed within the bore, a compressor inlet, and a compressor outlet. The compressor further includes a compression chamber defined between the bore and the rotor, wherein a volume of the compression chamber gradually reduces from the compressor inlet to the compressor outlet. The compressor includes an economizer. The economizer is fluidically connected to the compression chamber. The economizer is configured to inject a working fluid into the compression chamber at an injection position. The injection position is changeable according to a working condition of the compressor.

Fluid management in a hvac system

Embodiments of a spill over tank for an evaporator of a HVAC system are described. The spill over tank may be configured to receive a refrigerant directed out of the evaporator. The spill over tank may be configured to have an outlet directing refrigerant in the spill over tank out of the spill over tank and flowing back to a compressor of the HVAC system. The spill over tank may be equipped with a refrigerant level sensor configured to measure a refrigerant level in the spill over tank. The measured refrigerant level in the spill over tank may be used to control and/or maintain a refrigerant level in the evaporator, and/or may be used to control a return refrigerant flow into the compressor of the HVAC system so as to manage an oil return to the compressor.

Temperature Control System

An HVAC system controller has at least one processor configured to monitor at least one of a first humidity and a first temperature of a first air volume sensed by a first sensor and at least one of a second humidity and a second temperature of a second air volume sensed by a second sensor, configured to calculate an environmental metric, and configured to determine whether mixing the first air volume with the second air volume can cause the environmental metric to conform to a first threshold requirement. 1. A system controller , comprising:at least one processor configured to monitor (1) at least one of a first humidity and a first temperature of a first air volume sensed by a first sensor and (2) at least one of a second humidity and a second temperature of a second air volume sensed by a second sensor, configured to calculate an environmental metric, and configured to determine whether mixing the first air volume with the second air volume can cause the environmental metric to conform to a first threshold requirement.2. The system controller of claim 1 , wherein the environmental metric comprises at least one of (1) an average of the first temperature and the second temperature claim 1 , (2) an average of the first humidity and the second humidity claim 1 , and (3) a calculated enthalpy.3. The system controller of claim 1 , wherein a first weighting factor is associated with the first sensor and wherein a second weighting factor is associated with the second sensor.4. The system controller of claim 1 , wherein the first threshold requirement is associated with the first sensor and wherein a second threshold requirement is associated with the second sensor.5. The system controller of claim 1 , wherein a first weighting factor is associated with the first sensor claim 1 , wherein a second weighting factor is associated with the second sensor claim 1 , wherein the first threshold requirement is associated with the first sensor claim 1 , and wherein a second ...

SIDE MOUNTED REFRIGERANT DISTRIBUTOR IN A FLOODED EVAPORATOR AND SIDE MOUNTED INLET PIPE TO THE DISTRIBUTOR

A heat exchanger, for example a shell and tube flooded evaporator, has a refrigerant distributor that is positioned at an angle between the bottom of the shell and the sides of the shell, and includes an inlet that is welded to an inlet piping, where the inlet and inlet piping are in fluid communication with the refrigerant distributor, and are in a generally corresponding position orientation. Tubes of a tube bundles may extend proximate the bottom of the shell. 1. A heat exchanger for a heating , ventilation , and air conditioning (HVAC) unit , comprising:a shell;a tube bundle inside the shell;a refrigerant distributor inside the shell;a refrigerant inlet through the shell and in fluid communication with the refrigerant distributor; anda refrigerant inlet piping mounted on the shell and in fluid communication with the refrigerant inlet;the refrigerant inlet is positioned on a side of the shell at an angle away from the bottom of the shell, andthe refrigerant inlet piping is positioned on a side of the shell at an angle away from the bottom of the shell,wherein the refrigerant distributor comprises a baffle distribution component with a panel structure that forms a cavity, the baffle distribution component has baffles between which are openings in fluid communication with the cavity;a main distribution component with a panel structure that forms a cavity, the main distribution component has openings through the panel structure and in fluid communication with the cavity of the main distribution component,the main distribution component is arranged inside the baffle distribution component, where the openings of the main distribution component are in fluid communication with the cavity of the baffle distribution component, and where the cavities and openings allow refrigerant to flow into the heat exchanger.2. The heat exchanger of claim 1 , wherein the heat exchanger is configured as a flooded evaporator.3. The heat exchanger of claim 1 , wherein the angle of the ...

Sound enclosure for a compressor

A sound enclosure of a compressor to attenuate an operational sound level of the compressor is disclosed. The sound enclosure may be configured to generally enclose the compressor and attenuate radiantly emitted sound by the compressor. The sound enclosure may be configured to include a plurality of assembly sections, particularly two side sections and one bottom section, where the two side sections can be joined together like two halves of a clam shell and joined to the bottom section to facilitate easy assembly. The sound enclosure may form openings at longitudinal ends of the sound enclosure to accommodate refrigerant lines. The assembly sections of the sound enclosure may include one or more openings to accommodate a compressor junction box, wire bundles, oil lines, mounting mechanisms, etc.

Systems and Methods for Cleaning Air

An air cleaning system has a field charger comprising a plurality of bars comprising a conductive inner core and a non-conductive overmold, and a plurality of pins attached to the bars and extending out of the non-conductive overmold. The conductive inner core is molded over the plurality of pins, conductively connecting the pins, and the non-conductive overmold is molded over the conductive inner core. A method of manufacturing the field charger includes placing a plurality of metal pins in a mold, placing contact points in the mold, molding a conductive resin over at least a portion of the plurality of pins and contact points, molding an insulating resin over the inner core, plurality of pins, and contact points, wherein at least a portion of the pins and contact points extend from the non-conductive overmold, and mounting an earthplate to the conductive overmold.

Return waterbox for heat exchanger

A return waterbox for a heat exchanger, such as a shell-and-tube heat exchanger, is provided. The return waterbox may include an insert configured to direct a fluid flow(s) in the return waterbox. In some embodiments, such as in a two-pass heat exchanger, the insert can be configured to receive water from one portion of the heat exchanger tubes in the first pass and redirect the received water to another portion of the heat exchanger tubes in the second pass.

Oldham coupling with enhanced key surface in a scroll compressor

An Oldham coupling structure for a scroll compressor decreases Oldham coupling pressure loading without increasing compressor diameter or significantly increasing orbiting scroll or Oldham coupling inertia. The Oldham coupling key height and area are increased by recessing the key face into the ring portion of the Oldham coupling, increasing the key height and adding pads to the involute side of the orbiting scroll base plate to extend the key slot, potentially resulting in reduced compressor diameter and/or reduced orbiting scroll and Oldham coupling inertia.

Terminal assembly for refrigeration compressor

A terminal assembly configured to conduct current from an external power source to a hermetical motor-compressor unit. The terminal assembly includes a terminal board, at least one opening defined through the thickness of the terminal board, at least a conductive pin received in the opening, and an insulator having a convoluted contour. The insulator may be disposed over the conductive pin and spaced away from the terminal board.

Automated system to determine variable frequency drive skip frequency bands for vibration control

A vibration control system for a variable speed cooling system includes a programmable controller in communication with a variable frequency drive (VFD). The programmable controller is programmed to command the VFD to operate at frequencies only outside of one or more frequency lockout bands automatically calculated by the programmable controller based on a comparison of newly acquired variable speed cooling system vibration data with previously stored variable speed cooling system vibration specification data.

METHODS AND SYSTEMS TO MANAGE REFRIGERANT IN A HEAT EXCHANGER

Methods and systems to manage refrigerant flow inside a shell and tube heat exchanger, such as a condenser, to reduce inundation effect are provided. A method of managing refrigerant flow may include collecting at least a portion the refrigerant in the liquid state and directing the collected refrigerant in the liquid state toward an end of an internal space of the condenser. The method may further include directing the refrigerant in the liquid form toward a subcooling section. The method may also include directing the collected in the liquid state toward a refrigerant outlet located at proximately a middle section of a length of the condenser through the subcooling section. The condenser may have one or more separation/collection pans positioned within heat transfer tubes to collect and direct the refrigerant in the liquid form. A two-stage refrigerant distributor is also disclosed. 1. A heat exchanger comprising:a shell having an internal space, the internal space having a length and a height;a refrigerant inlet;a first-stage distributor positioned next to the refrigerant inlet in the internal space of the heat exchanger, the first-stage distributor extending in a longitudinal direction of the length of the heat exchanger; anda second-stage distributor positioned next to the first-stage distributor in the internal space of the heat exchanger, the second-stage distributor extending in the longitudinal direction of the length of the heat exchanger.2. The heat exchanger of further comprising:a plurality of heat transfer tubes running in a longitudinal direction of the length of the shell in the internal space; anda first separation/collection pan running in a direction of the length of the internal space of the shell positioned within the plurality of heat transfer tubes, where the plurality of heat transfer tubes configured to cool a refrigerant in a vapor state so that at least a portion of the refrigerant in the vapor state transits to a liquid state.3. The heat ...

MICROZONE HVAC SYSTEM WITH PRECISION AIR DEVICE

Systems, apparatus and methods for providing personalized comfort to occupants of a conditioned space. A precision air device having a standalone controllable fan with directional nozzles is provided. The precision air device includes environmental and occupancy sensors, and communicates with a user device and with other precision air devices in the space. Application software installed on an occupant's user device enables the occupant to specify whether it is too cold or too warm within his or her personal space, or microzone. The collective demand of all microzones within a VAV macrozone is determined by a precision air aggregator to adjust a controllable VAV damper for that macrozone. 1. A precision air device , comprising:a housing;an air intake;an outlet nozzle;a nozzle damper operatively associated with the outlet nozzle;an air mover configured to move air from the air intake to the outlet nozzle;an air sensor; and a processor in operative communication with the air mover and the air sensor;', 'a communications interface coupled to the processor; and', verify the presence of an occupant;', 'determine a target air velocity; and', 'adjust the nozzle damper and/or the air mover to deliver the determined air velocity from the outlet nozzle., 'a memory coupled to the processor storing instructions, which, when executed by the processor, cause the controller to], 'a controller, comprising2. The precision air device in accordance with claim 1 , further comprising an actuator coupled to the nozzle damper claim 1 , the actuator in operative communication with the processor and configured to adjust the position of the nozzle damper.3. The precision air device in accordance with claim 1 , further comprising an occupancy sensor in operative communication with the processor.4. The precision air device in accordance with claim 1 , wherein the air sensor includes a temperature sensor and/or a relative humidity sensor.5. The precision air device in accordance with claim 1 , ...

DEMAND CONTROL VENTILATION WITH PREDICTIVE HUMIDITY CONTROL

Systems, apparatus and methods for operating an environmental control system that delivers dehumidified outdoor air into a conditioned space through an air valve. The method includes establishing COsetpoints corresponding to a ventilation outdoor air flow rate and a dehumidification outdoor air flow rate, determining a humidity metric of the conditioned space, and delivering outside air to the conditioned space at the ventilation outdoor air flow rate or dehumidification outdoor air flow rate based upon the humidity metric. The outside air may be tempered with return air from the conditioned space. The dehumidification COset point is determined by predicting the dehumidification COset point based on the airflow quantity per occupant and the relationship of the occupant predicted water vapor emission rate and COemission rate. 1. A method of operating an environmental control system that delivers dehumidified outdoor air into a conditioned space through an air valve , comprising:{'sub': '2', 'establishing a ventilation COsetpoint corresponding to a ventilation outdoor air flow rate;'}{'sub': '2', 'establishing a dehumidification COsetpoint corresponding to a dehumidification outdoor air flow rate;'}determining a humidity metric of the conditioned space;adjusting the air valve to deliver dehumidified air into the conditioned space at the dehumidification outdoor air flow rate in response to a determination that the humidity metric is above a predetermined threshold; andadjusting the air valve to deliver dehumidified air into the conditioned space at the ventilation outdoor air flow rate in response to a determination that the humidity metric is below a predetermined threshold.2. The method in accordance with claim 1 , wherein establishing a dehumidification CO2 set point comprises predicting the dehumidification CO2 set point from the airflow quantity per occupant and the relationship of the occupant predicted water vapor emission rate and CO2 emission rate.3. The ...

ENHANCED SELECTION TOOL FOR HVAC SYSTEM COMPONENTS

A product selection tool is disclosed that utilizes input from consumers and third party data sources to dynamically enhance the selection of HVAC components. Specific and estimated data characterizing existing HVAC components is used to identify suitable replacement HVAC components based on type, size, energy efficiency, and other system requirements in view of regional climate data. 1. A computer system for selecting HVAC products , comprising:a screen display interface;a memory;a processor;a network interface; and query a residence street address and zip code;', 'lookup climate from zip code;', 'import residential data from another computer through the network interface based on residence street address;', 'from the imported data, extract required home information comprising square footage of living space and age;', 'query a type and total number of existing HVAC system(s);', 'estimate the size and energy efficiency of the existing HVAC system(s) from the required home information;', 'determine replacement HVAC products based on the type, size and energy efficiency determined in previous steps;', 'present and query preferences concerning the replacement HVAC products; and', 'dynamically present replacement HVAC products and prices for said products on the screen display interface based on the preferences specified., 'a program that, when loaded in to the memory and executed by the processor, causes the processor to2. The computer system in accordance with claim 1 , wherein the program claim 1 , when loaded into the memory and executed by the processor claim 1 , further causes the processor to query zip code and required home information comprising square footage of living space and age.3. The computer system in accordance with claim 2 , wherein the program claim 2 , when loaded into the memory and executed by the processor claim 2 , further causes the processor to:query model number(s) and total number of existing HVAC system(s); andlookup the type, size and ...

CENTRIFUGAL COMPRESSOR ASSEMBLY AND METHOD

A centrifugal compressor assembly for compressing refrigerant in a 250-ton capacity or larger chiller system comprising a motor, preferably a compact, high energy density motor or permanent magnet motor, for driving a shaft at a range of sustained operating speeds under the control of a variable speed drive. Another embodiment of the centrifugal compressor assembly comprises a mixed flow impeller and a vaneless diffuser sized such that a final stage compressor operates with an optimal specific speed range for targeted combinations of head and capacity, while a non-final stage compressor operates above the optimum specific speed of the final stage compressor. Another embodiment of the centrifugal compressor assembly comprises an integrated inlet flow conditioning assembly to condition flow of refrigerant into an impeller to achieve a target approximately constant angle swirl distribution with minimal guide vane turning. 1. A compressor assembly for compressing a refrigerant in a chiller system comprising:a. a centrifugal compressor having a 250-ton capacity or larger, said centrifugal compressor having a compressor housing with a compressor inlet for receiving the refrigerant and a compressor outlet for delivering the refrigerant;b. a shaft;c. an impeller in fluid communication with said compressor inlet and said compressor outlet, said impeller mounted to said shaft and being operable to compress refrigerant;d. a direct drive, high energy density motor for directly driving the shaft at a range of sustained operating speeds less than about 20,000 revolutions per minute; ande. a variable speed drive configured to vary operation of the motor within the range of sustained operating speeds.2. The compressor assembly of wherein the refrigerant is R-123 claim 1 , R-134a or R-22 in liquid claim 1 , gas claim 1 , or multiple phases.3. The compressor assembly of wherein the refrigerant is an azeotrope claim 1 , a zeotrope or a mixture or blend thereof in liquid claim 1 , gas ...

Air Cleaning Systems and Methods

An HVAC system having an air cleaner, a fan that selectively generates an air flow at least partially through the air cleaner, and a controller that establishes a functional relationship between an air flow related criterion and a correlated power level setting of the air cleaner, determines an air flow related criterion value, determines a correlated power level setting value using the determined air flow related criterion value and the functional relationship, and controls the air cleaner as a function of the determined correlated power level setting value is disclosed.

METHOD OF DISPLAYING INCREMENTING OR DECREMENTING NUMBER TO SIMULATE FAST ACCELERATION

A method for displaying an accelerated change in a numerical value on a computer display, wherein the accelerated change displayed on the computer display is not limited by hardware limitations, such as refresh rate and/or a processor speed. The method displays a sequence of numbers to simulate an accelerating change of the numerical value displayed on a display device. 1. A method for displaying a sequence of numbers for simulating an accelerating change of a numerical value displayed on a display device without being limited by a hardware limitation , the method comprising:displaying a first number on a portion of the display device;displaying a second number on the portion of the display device and replacing the first number displayed on the portion of the display device; anddisplaying a third number on the portion of the display device and replacing the second number displayed on the portion of the display device,wherein a difference of value between the second number and the third number is greater than a difference of value between the first number and the second number.2. The method according to claim 1 , wherein the difference of value between the first number and the second number is a prime number value; and the difference of value between the third number and the second number is a prime number value.3. The method according to claim 1 , wherein the ones place digit of the first number is different from the ones place digit of the second number.4. The method according to claim 3 , wherein the ones place digit of the first number is different from the ones place digit of the second number.5. The method according to claim 1 , wherein each place digit of the first number is different from each place digit of the second number.6. The method according to claim 5 , wherein each place digit of the second number is different from each place digit of the third number.7. The method according to claim 1 , wherein each place digit of the second number is different ...

METHODS OF CONTROLLING FAN CAPACITY AND COIL CAPACITY IN HVAC SYSTEMS

Methods to regulate a discharge fan and a coil of a HVAC system are described. The method may include regulating a discharge air temperature of the cooling/heating coil of the HVAC system while maintain the discharge fan at a low capacity setting. The method may also include maintaining the coil at a low discharge air temperature (or a high discharge air temperature) setting, while varying a fan capacity of the discharge fan. The method may include a discharge capacity boost that includes decreasing (or elevating) the discharge air temperature limit of the coil beyond the low discharge air temperature (or the high discharge air temperature) limit. The methods as described herein may be applicable to a HVAC system that has variable airflow capability. 1. A method of controlling a HVAC system , comprising:maintaining a discharge fan capacity at a low fan capacity setting and varying a coil discharge air temperature between a low discharge air temperature limit and a high discharge air temperature limit;when the coil discharge air temperature reaches the low discharge air temperature limit, varying the discharge fan capacity between the low fan capacity setting and a high fan capacity setting so as to maintain a space temperature setpoint while maintaining the low discharge air temperature limit; andwhen the coil discharge air temperature reaches the low discharge air temperature limit and the discharge fan capacity reaches the high fan capacity setting, varying the coil discharge air temperature between the low discharge air temperature limit and a first boost low discharge air temperature limit that is lower than the low discharge air temperature limit.2. The method of controlling a HVAC system of claim 1 , further comprising:when the coil discharge air temperature reaches the high discharge air temperature limit, varying the discharge fan capacity between the low fan capacity setting and the high fan capacity setting so as to maintain the space temperature setpoint ...

Expansion Valve Control System and Method for Air Conditioning Apparatus

A method of controlling an HVAC system electronic expansion valve (EEV) includes determining an optimal EEV position for the HVAC system as a function of a variable related to an ambient environment enthalpy and operating the HVAC system as a function of the optimal EEV position. 1. A method of controlling an HVAC system electronic expansion valve (EEV) , comprising:determining an optimal EEV position for the HVAC system as a function of a variable related to an ambient environment enthalpy; andoperating the HVAC system as a function of the optimal EEV position.2. The method of claim 1 , wherein the ambient environment is associated with an evaporator of the HVAC system.3. The method of claim 1 , wherein the ambient environment is associated with a condenser of the HVAC system.4. The method of claim 1 , wherein the variable is an indoor temperature.5. The method of claim 1 , wherein the variable is an outdoor temperature.6. The method of claim 1 , wherein the variable is an indoor humidity.7. The method of claim 1 , wherein the variable is an indoor wet bulb temperature.8. The method of claim 1 , wherein the optimal EEV position is further determined as a function of a selected startup operating capacity of the HVAC system.9. The method of claim 8 , wherein the startup operating capacity is a compressor capacity.10. The method of claim 9 , wherein the optimal EEV position is further determined as a function of at least one of an EEV model claim 9 , and EEV type claim 9 , and an EEV specification.11. The method of claim 1 , further comprising:while operating the EEV as a function of the optimal EEV position, operating the EEV as a function of a superheat feedback of the HVAC system.12. The method of claim 1 , further comprising:after operating the EEV as a function of the optimal EEV position, operating the EEV as a function of a superheat feedback of the HVAC system.13. A method of controlling an electronic expansion valve (EEV) of an HVAC system claim 1 , ...

CHILLER PLANT WITH DYNAMIC SURGE AVOIDANCE

Systems, apparatus and methods for efficiently operating a chiller plant while minimizing or eliminating the occurrence of centrifugal compressor surge. Taking into account chiller design specifications and current operating conditions, a compressor lift point at which surge is predicted to occur is established. Minima and maxima for various chiller setpoints that avoid or eliminate the occurrence of compressor surge are imposed on setpoints provided by a conventional optimizing chiller controller. The chiller system is operated in accordance with the resultant anti-surge setpoints. Energy savings is realized by modulating coolant tower flow to enable the compressor to operate at near-surge conditions while preventing the onset of actual surge. 1. A method of operating a chiller system , comprising:determining a predicted surge lift temperature difference of a centrifugal compressor of the chiller system;calculating anti-surge condenser water minimum and maximum temperature limits;calculating anti-surge condenser water minimum and maximum flow rate limits;establishing an anti-surge condenser water temperature setpoint as a provisional condenser water temperature setpoint constrained between the anti-surge condenser water minimum and maximum temperature limits;establishing an anti-surge condenser water flow rate setpoint as the provisional condenser water flow rate setpoint constrained between the anti-surge condenser water minimum and maximum flow rate limits; andoperating the chiller system in accordance with the anti-surge condenser water temperature setpoint and the anti-surge condenser water flow rate setpoint.2. The method of operating a chiller system according to claim 1 , further comprising receiving a provisional entering condenser water temperature setpoint and a provisional condenser water flow rate setpoint from an optimizing controller.3. The method of operating a chiller system according to claim 1 , further comprising:calculating a minimum and a ...

SYSTEM AND METHOD TO ASSIST BUILDING AUTOMATION SYSTEM END USER BASED ON ALARM PARAMETERS

Disclosed are systems and methods for operating a Building Automation System (BAS) that communicates with end devices via a master-slave token passing network (MSTP), e.g., BACNet, a local operating network (LON), or any other suitable communications protocol to receive alarm messages. The BAC enables a user to rapidly and effectively respond to an alarm by providing an alarm assistance message that provides the user with detailed remediation procedures concerning the current alarm. The nature and content of the alarm assistance message and/or the attachments is determined based upon on a combination of alarm and system parameters, and may be tailored by an administrator to meet local requirements. The alarm assistance message may include one or more remedial or diagnostic attachments, such as a troubleshooting guide, user manual, a video, graphics, or a firmware update, and may include links to external media or cloud-hosted documents. 1. A BAS controller adapted for use in a building automation system (BAS) having a plurality of end devices coupled to the BAS controller via a building automation communication network , comprising: an alarm processor configured to receive an alarm message to generate an alarm assistance message comprising remediation media and a recipient address.2. The BAS controller in accordance with claim 1 , wherein the alarm processor is configured to receive the alarm message from at least one of the plurality of end devices.3. The BAS controller in accordance with claim 1 , wherein the building automation communication network comprises a BACnet claim 1 , a LON claim 1 , and/or a wireless mesh network.4. The BAS controller in accordance with claim 1 , wherein the alarm assistance message is generated based on at least one alarm parameter included in the alarm message.5. The BAS controller in accordance with claim 4 , wherein the alarm parameter is selected from the group consisting of an end device type claim 4 , a unique end device ...

Diagnostics for systems including variable frequency motor drives

One embodiment is a diagnostic method for a system including setting a first diagnostic code based upon a condition of a DC bus of a variable frequency drive during a first drive state, setting at least one additional diagnostic code based upon a condition of at least one motor phase current during a second drive state, outputting first diagnostic information indicating a malfunction of the variable frequency drive if the first diagnostic code indicates a first error, and outputting second diagnostic information indicating a malfunction of a motor or a connector coupling the motor and the drive if the at least one additional diagnostic code indicates a second error.

Variable orifice flow control device

A variable orifice flow device controls the flow of a fluid between a volute casing and a compressor motor casing in a compressor. The variable orifice flow device may be a shuttling valve, with positions controlled by, for example, valves controlling the flow of the fluid into a space opposite a side within the shuttling valve assembly. The variable orifice flow device may have one or more orifices through which a fluid can enter the compressor motor casing, and the surface area of the orifices may be controlled by the position of the shuttling valve.

Air Cleaning Systems and Methods

An HVAC system having an air cleaner, a fan configured to selectively generate an air flow, wherein at least a portion of the air flow is passed through the air cleaner, and a controller configured to control the air cleaner in response to at least one of a setting for controlling the fan and an operation characteristic of the fan is disclosed.

HVAC SYSTEM INCLUDING THERMOSTAT WITH AUTOMATIC COMPONENT REPLACEMENT CAPABILITIES

A system configured for automatic replacement of peripheral components of a heating, ventilation and air condition (HVAC) system is provided. The system includes a thermostat in operable communication with at least one peripheral component of the HVAC system and a server in operable communication with the thermostat and a manufacturer for providing the manufacturer with a status of the at least one peripheral component. 1. A system configured for automatic replacement of peripheral components of a heating , ventilation and air condition (HVAC) system , the system comprising:a thermostat in operable communication with at least one peripheral component of the HVAC system; anda server in operable communication with the thermostat and a manufacturer for providing the manufacturer with a status of the at least one peripheral component.2. The system of claim 1 , wherein the at least one peripheral component is one of a humidifier claim 1 , a humidifier pad claim 1 , an ultraviolet light claim 1 , an air filter claim 1 , a media filter claim 1 , a collection cell claim 1 , a ventilation and system service claim 1 , a filter screen claim 1 , an electrode of an air filter claim 1 , and an in force field filter (IFD).3. The system of claim 1 , wherein the server is a dealer diagnostics portal associated with the manufacturer.4. The system of claim 1 , wherein the server sends a notification to one of the manufacturer and a user of the thermostat as a result of receiving a control signal from the thermostat.5. The system of claim 4 , wherein the notification is one of an email claim 4 , a text claim 4 , and a telephone call.6. The system of claim 1 , wherein the thermostat is configured to provide a graphical user interface (GUI) that allows a user to enroll in an auto-subscription service provided by the server.7. The system of claim 4 , wherein depending on an auto-subscription service selected by the user claim 4 , a notification is displayed on the thermostat either prior ...

Efficiently routing excess air flow

Architectures and techniques are presented that can more efficiently route excess air flow by intelligently selecting the zones to which the excess air flow is to be routed. Excess air flow results from an HVAC device providing (e.g., at a minimum setting) a volume of air that is greater than what is demanded by a zone that triggers activation of the HVAC device. As one example, excess air flow can be routed to a zone or zones that are determined to be most likely to trigger a subsequent activation condition that would cause the HVAC device to be activated again at a future time.

SLEEP ENHANCEMENT IN AN HVAC SYSTEM

Improvements to an HVAC thermostat include a sleep-enhancing feature which regulates the target temperature of the HVAC system according to a temperature profile which complements the natural changes in body temperature of a person during sleep. The timing of the temperature profile is advanced to cause room temperature to decrease before the natural decrease in body temperature is expected to occur, thereby helping lead a person into sleep without the use of pharmaceuticals or other artificial sleeping aids. The temperature profile causes room temperature to increase towards the end of the sleep period, thus avoiding disruptions of sleep when body temperature is lowest or during REM stages of sleep when the human body's ability to thermo-regulate is diminished. The rate of change of the target environment temperature is controlled to further enhance the quality and duration of sleep. 1. A sleep-enhancing method of operating an HVAC system , comprising:determining the onset of a sleep time period; anddecreasing the target temperature of the HVAC system according to a temperature profile, wherein the temperature profile emulates the change in body temperature of a human being during the sleep time period.2. The method in accordance with claim 1 , further comprising raising the target temperature of the HVAC system prior to the end of the sleep time period.3. The method in accordance with claim 1 , further enhancing sleep by commencing the lowering prior to the onset of the sleep time period to cause the temperature profile to lead the change in body temperature of a human being during the sleep time period.4. The method in accordance with claim 1 , wherein the temperature profile defines a plurality of consecutive sub-periods.5. The method in accordance with claim 4 , wherein during a first sub-period claim 4 , the target temperature decreases at a first rate.6. The method in accordance with claim 4 , wherein during a second sub-period claim 4 , the target ...

Compressor including laser-hardened bearing surfaces

This disclosure is directed to compressors with hardened bearing surfaces, particularly laser-hardened bearing surfaces. Laser hardening can be used to precisely harden selected areas of the bearing surfaces of the compressor components. By hardening those selected areas, wear resistance can be improved and sliding wear can be reduced. This can result in thrust plates having different material structures configured to contact one another, such as one having a primarily pearlitic microstructure with the opposing thrust plate having a primarily martensitic microstructure. This can reduce adhesive wear by providing dissimilarity on the wearing surfaces.

System and method for controlling a system that includes variable speed compressor

A system and method for controlling a system that includes a variable speed compressor are described. The method can provide improved accuracy in the control of a system, for example, a heating, ventilating, and air condition (HVAC) system that includes a variable speed compressor, and can reduce a compressor cycling frequency of the compressor when a required capacity is below a minimum capacity of the compressor.

Active clearance management in screw compressor

A compressor includes a housing defining a working chamber. The housing further includes a bore and an endplate disposed toward a discharge end. The compressor further includes a rotor having helical threads, the rotor being configured to be housed in the bore, a rotor clearance, a controllable bearing supporting the rotor, and a controller configured to control the controllable bearing such that the controllable bearing moves the rotor in a manner to reduce and/or enlarge the rotor clearance.

Method of extracting diagnostic information from an hvac system

The present disclosure is directed to a method for determining the operational state of an HVAC system. The method includes transmitting diagnostic data and/or commissioning settings to and from an HVAC system and server by means of a mobile device, comparing the data to a predetermined condition, and transmitting updated system information back to the HVAC system if needed.

Tube cutting device and method of using the same

A tube cutting device includes a tube holding member that holds a target tube from an inside of the target tube, allowing the target tube to be cut from an outside; and a cutter carrier member that includes a cutter eccentrically pivotable relative to the geometry axis of an elongate body of the cutter carrier member, such that when in a non-extended position, the cutter is positioned within a diameter of the elongate body, and when in an extended position, the cutter extends outwardly and cuts into a wall of the target tube.

Cover Panels for Climate Control System Housings and Methods Related Thereto

Methods of coupling a heat exchanger into a climate control system and associated systems are disclosed. In an embodiment, the method includes receiving a housing to receive the heat exchanger. The housing includes a cover panel disposed over an opening that has a projection projecting at least partially into the housing, and a first pair of conduits extending through the cover panel in a first direction. In addition, the method includes removing the cover panel from the opening, flipping the cover panel, extending a second pair of conduits through the cover panel in the first direction, and forming connections between the first pair of refrigerant conduits and the second pair of conduits. Further, the method includes covering the opening in the heat exchanger housing with the cover panel so that the projection of the cover panel projects away from the housing and encloses the connections.

HVAC THERMOSTAT

Improvements to an HVAC thermostat include a fuel control module that estimates a rate of fuel usage by the HVAC system and issues a warning and optionally schedules a fuel delivery or solicits a fuel delivery bid when the on-site fuel supply drops beneath a predetermined level, a nightlight module that illuminates a touchscreen in accordance with at least one nightlight parameter, and a user interface mode control module that selects for display on the touchscreen display, a primary user interface from among a plurality of potential user interfaces based at least in part upon the frequency of use of each of the plurality of potential user interfaces. 1. An improved HVAC thermostat for an HVAC system having an on-site fuel supply , comprising:a touchscreen display; anda fuel control module configured for estimating a rate of fuel usage by the HVAC system and for issuing an alert when the on-site fuel supply drops beneath a predetermined level.2. The improved HVAC thermostat in accordance with claim 1 , wherein the fuel control module estimates a rate of fuel usage by performing a fuel calibration cycle to determine a fuel calibration constant.3. The improved HVAC thermostat in accordance with claim 2 , wherein the fuel calibration constant is the amount fuel used per unit of run time.4. The improved HVAC thermostat in accordance with claim 2 , wherein the fuel calibration constant is the amount fuel used per heating degree day.5. The improved HVAC thermostat in accordance with claim 1 , wherein the fuel control module is further configured for transmitting a fuel delivery request when the on-site fuel supply drops beneath a predetermined level.6. The improved HVAC thermostat in accordance with claim 1 , wherein the fuel control module is further configured to receive a user input indicative of a quantity of fuel added to the on-site fuel supply.7. The improved HVAC thermostat in accordance with claim 1 , wherein the fuel control module is further configured to ...

THERMOSTAT AND METHOD FOR CONTROLLING AN HVAC SYSTEM WITH REMOTE TEMPERATURE SENSOR AND ONBOARD TEMPERATURE SENSOR

A heating, ventilation and air condition (HVAC) system is provided. The system includes a thermostat including an onboard temperature sensor, a remote temperature sensor in operable communication with the thermostat, and a controller in operable communication with each of the onboard sensor and the remote sensor and configured to execute a control algorithm that calculates a temperature difference between a temperature detected by the onboard temperature sensor and a temperature detected by the remote temperature sensor, such that when the remote temperature sensor fails, the controller uses the calculated temperature difference to calibrate the onboard temperature sensor and set the thermostat to the temperature detected by the remote temperature sensor. 1. A heating , ventilation and air condition (HVAC) system , the system comprising:a thermostat including an onboard temperature sensor;a remote temperature sensor in operable communication with the thermostat; anda controller in operable communication with each of the onboard sensor and the remote sensor and configured to execute a control algorithm that calculates a temperature difference between a temperature detected by the onboard temperature sensor and a temperature detected by the remote temperature sensor, such that when the remote temperature sensor fails, the controller uses the calculated temperature difference to calibrate the onboard temperature sensor.2. The system of claim 1 , wherein the control algorithm is configured to calculate the temperature difference by mapping a temperature detected by the remote temperature sensor to a temperature detected by the onboard sensor over a time period claim 1 , calculate an error constant based on the mapped temperatures claim 1 , and calibrate the onboard temperature sensor.3. The system of claim 2 , wherein the time period is divided into a plurality of time periods and the error constant is calculated for each time period of the plurality of time periods.4. ...

MODULAR HEAT PUMP SYSTEM

An HVAC system utilizes one or more modular heat pump units installed within an outer wall or corner of a building, and one or more active registers. A central hub, which can be integrated into a modular HVAC unit, receives input from thermostats and sensors in the building and adjusts operation of the modular HVAC units and active registers to distribute conditioned air throughout the building. The system provides convenience and comfort of a traditional split HVAC system with significantly reduced installation and maintenance costs. The modular HVAC unit includes an interchangeable cartridge that contains the active components of a heat pump. Cartridges of different capacities can be installed as required, and are easily swapped out for maintenance, servicing, and replacement. A user can control the system using traditional-style thermostats and with a smart phone, tablet or computer. A cloud server provides backup services and remote access to the system. 1. An in-wall enclosure for mounting a modular HVAC cartridge within a space defined by an exterior sheathing of a building , a first vertical stud , and a second vertical stud , comprising:an indoor duct opening and an outdoor duct opening defined therein;an outdoor air inlet defined therein; anda front opening exposing a cavity configured to operatively receive a modular HVAC cartridge.2. The in-wall enclosure in accordance with claim 1 , further comprising:an indoor duct extending from the indoor duct opening to an indoor duct outlet; andan outdoor duct extending from the outdoor duct opening to an outdoor duct outlet.3. The in-wall enclosure in accordance with claim 1 , further comprising a condensate outlet port.4. The in-wall enclosure in accordance with claim 1 , further comprising an electrical connector disposed in the cavity.5. The in-wall enclosure in accordance with claim 4 , wherein the electrical connector is positioned to electrically engage a mating connector provided on the modular HVAC ...