Heat pump apparatus

DISTRIBUTOR SYSTEMS FOR HEAT EXCHANGERS

A header tube assembly is disclosed and can include an outer tube, an inner tube, and a flow valve. Each of the outer and inner tubes can include an open end and a closed end, as well as a plurality of apertures extending through a sidewall of the outer tube and inner tube, respectively. The apertures of the inner tube can permit a flow of refrigerant between an internal volume of the inner tube and a gap between the inner and outer tubes, and the apertures of the outer tube can permit a flow of refrigerant between the internal volume of the outer tube and a plurality of refrigerant circuits in a heat exchanger. The flow valve can be configured to selectively prevent refrigerant from flowing between the gap and the open end of the outer tube, depending on a direction of refrigerant flow through the header tube assembly.

Floating evaporator saturated suction temperature systems and methods

Systems and methods are provided and include first and second case controllers for first and second refrigeration cases. The first case controller receives a first air temperature value of the first refrigeration case and communicates the first air temperature value to the second case controller. The second case controller receives a second air temperature value, determine an evaporator saturated suction temperature (SST) value, controls an evaporator pressure regulator based on a comparison of the evaporator SST value with an evaporator SST setpoint, determines an air temperature control value, determines whether the air temperature control value is within a predetermined range of an air temperature setpoint, and adjusts the evaporator SST setpoint in response to the air temperature control value being outside of the predetermined range of the air temperature setpoint.

Refrigeration Systems with a First Compressor System and a Second Compressor System

A refrigeration system includes a first compressor system, a second compressor system, a first conduit, a heat exchanger, a second conduit, and a third conduit. The first compressor system includes a plurality of first compressors. The second compressor system includes a plurality of second compressors. The first conduit is configured to provide refrigerant from the first compressor system to the second compressor system. The second conduit is fluidly coupled to the first conduit and configured to provide the refrigerant from the first compressor system to the heat exchanger. The third conduit is configured to provide the refrigerant from the second compressor system to the heat exchanger. 1. (canceled)2. A refrigeration system comprising:a first compressor system comprising a plurality of first compressors;a second compressor system comprising a plurality of second compressors;a first conduit configured to provide refrigerant from the first compressor system to the second compressor system;a second conduit fluidly coupled to the first conduit and configured to provide the refrigerant from the first compressor system to one or more defrost targets; anda third conduit configured to provide the refrigerant from the one or more defrost targets to the first compressor system and the second compressor system.3. The refrigeration system of claim 2 , further comprising a flash tank configured to receive the refrigerant from the third conduit.4. The refrigeration system of claim 2 , further comprising a defrost control valve disposed along the first conduit downstream of the first compressor system and upstream of the second conduit claim 2 , the defrost control valve configured to be selectively positioned to establish a target temperature of the refrigerant in the second conduit.5. The refrigeration system of claim 2 , further comprising:a heat exchanger comprising a first circuit and a second circuit, the second conduit configured to provide the refrigerant to the second ...

Valve comprising a dual piston assembly and method of forming a valve

A valve for a refrigeration system and a method of forming a valve includes a dual piston assembly having an inner piston (44) and an outer piston (42) that are moveable relative to each other to control pressure equalization flow through the valve, and an adjustable control stem (66) engageable with the outer piston that enables a low fluid equalization flow when in a first position and a variably higher fluid equalization flow when in a variable second position. The inner piston has a plurality of bleed orifices (46, 48) that are openable by movement of the outer piston relative to the inner piston.

Hot gas defrost using dedicated low temperature compressor discharge

A refrigeration system includes a dedicated defrost-mode compressor that delivers high pressure, high temperature refrigerant to one or more evaporators to defrost the evaporators.

Fahrzeugklimatisierungseinrichtung

Fahrzeugklimatisierungseinrichtung aufweisend: einen Kompressor (21), konfiguriert zum Komprimieren und Ausstoßen eines Kältemittels; einen Radiator (15), der in einer Luftflusspassage (11), die ermöglicht, dass Luft dort hindurchtritt, die einem Fahrzeuginnenraum zuzuführen ist, vorgesehen ist und konfiguriert ist, Wärme von dem Kältemittel abzugeben; einen Wärmetauscher (14), der in der Luftflusspassage (11), die ermöglicht, dass Luft dort hindurchtritt, die dem Fahrzeuginnenraum zuzuführen ist, vorgesehen ist und konfiguriert ist, die Wärme in das Kältemittel zu absorbieren; und einen äußeren Wärmetauscher (22), der außerhalb des Fahrzeuginnenraums vorgesehen ist und konfiguriert ist, die Wärme von dem Kältemittel abzugeben oder die Wärme in das Kältemittel zu absorbieren, wobei die Fahrzeugklimatisierungseinrichtung durchführt: einen Heizbetrieb, zum Abgeben der Wärme von dem Kältemittel, das von dem Kompressor (21) in den Radiator (15) ausgestoßen wird, um das Kältemittel mittels eines ...

Cooling system with compressor bypass

A cooling system is designed to generally allow for one or more compressors to be bypassed when ambient temperatures are low. The system includes a bypass line and valve that opens when ambient temperatures are low and/or when the pressure of the refrigerant in the system is low. In this manner, the refrigerant can flow through the bypass line instead of through one or more compressors. These compressors may then be shut off. To supply any needed pressure to cycle the refrigerant, the system may include a pump that turns on when the bypass line is open. When ambient temperatures are extremely low, thermosiphon may be used to cycle the refrigerant.

Power managing method and system for transportation refrigeration unit

A power management method used for power distribution in a transportation refrigeration unit. The power management method includes calculating engine power according to engine operating parameters; calculating power generator real-time input power according to power generator excitation current; calculating available power based on the power generator real-time input power and the engine power; and managing power distributed to a compressor based on the available power. The present invention further relates to a power management system. The power management method and system have the advantages of simplicity, reliability, stable operation and the like, the power generator real-time input power can be calculated according to the power generator excitation current, thus more power can be provided to the compressor on the premise that the power supply to power generator loads is guaranteed, and the operating efficiency of the transportation refrigeration unit is improved.

Expansion valve position detection in refrigeration system

A refrigerated display case having a housing defining a temperature controlled space and a refrigeration system coupled to the housing is provided. The refrigeration system is configured to be operable to affect a temperature of the temperature controlled space. The refrigeration system includes an actuator, a controller, and a sensor. The controller is configured to continuously update a stored position of the actuator based on measurement of an electric current provided to the actuator, retrieve the stored position after a power failure, and restart control based on the stored position of the actuator. The sensor is configured to communicate with the controller.

PARALLEL FLOW EXPANSION FOR PRESSURE AND SUPERHEAT CONTROL

A Heating, Ventilation, and Air Conditioning (HVAC) system that is configured to receive a refrigerant from a condenser at a fixed expansion device and a variable expansion device. The system is further configured to output a first portion of the refrigerant to a first downstream HVAC component at a fixed flow rate using the fixed expansion device. The system is further configured to sense a temperature of an evaporator using a sensing bulb and to apply a first force to a pin of the variable expansion device based on the sensed temperature. The system is further configured to apply a second force to a valve of the variable expansion device via the force applied to the pin and to output a second portion of the refrigerant to a second downstream HVAC component at a variable flow rate based on the second force using the valve of the variable expansion device.

HEAT VENTILATION AND AIR CONDITIONING UNIT

A heat ventilation and air conditioning (HVAC) unit (100) is disclosed. The HVAC unit (100) includes a compressor (102), a condenser (104), a first expansion device (106), a second expansion device (118), a third expansion device (120), an evaporator (108), a heat recovery unit (110), a first 4-way valve (112), a second 4-way valve (114), a one-way valve (118) and a controller (124). The controller (124) determines a first discharge superheat temperature for the refrigerant entering the evaporator (108) and a second discharge superheat temperature for the refrigerant entering the heat recovery unit (110) and adjust the first flow rate and the second flow rate to maintain ideal heat distribution between the heat recovery unit (110) and the evaporator (108).

HVAC DUAL DE-SUPERHEATING/SUBCOOLING HEAT RECLAIM SYSTEM FOR TRANSCRITICAL REFRIGERATION SYSTEMS

A dual reclaim coil with a smart control application is provided that allows the refrigerant inlet to the HVAC unit switch between the two sides of the condenser is aimed to use the high temperature and pressure of the condenser/gas cooler outlet while a CO2refrigerant system is operating above critical point. This occurs in hot ambient conditions, when the need for heating in the space is not as great as in the wintertime and the available heat at the condenser/gas cooler's outlet is sufficient to satisfy the heating load. This also mitigates space overcooling, while increasing the CO2transcritical system's efficiency by subcooling the refrigerant for applications involving dehumidification HVAC systems which often results in a phenomenon called “overcooling” during the dehumidification season.

HVAC dual de-superheating/subcooling heat reclaim system for transcritical refrigeration systems

A dual reclaim coil with a smart control application is provided that allows the refrigerant inlet to the HVAC unit switch between the two sides of the condenser for heat reclaim for refrigerants such as CO2which have a relatively low critical temperature compared to hydrofluorocarbon refrigerants. Heat reclaim after the exit of gas from the condenser utilizes the high temperature and pressure of the condenser/gas cooler outlet while a CO2refrigerant system is operating above critical point. This occurs in hot ambient conditions, when the need for heating in the space is not as great as in the wintertime and the available heat at the condenser/gas cooler's outlet is sufficient to satisfy the heating load. When the CO2refrigerant system is operating below the critical point, heat reclaim is carried out at the compressor discharge.

Reversible thermal management device for a motor vehicle

A reversible thermal management device for a motor vehicle includes a refrigerant fluid circuit containing a main loop which has, successively, a compressor, an internal condenser, a first expansion device and an external evaporator/condenser. The device also has a three bypass branches. The third bypass branch has a heat exchanger. The device further includes a device for redirecting the refrigerant fluid coming from the internal condenser towards the first expansion device or the first bypass branch, a stop valve for the refrigerant fluid, arranged on the main loop, a first check valve arranged on the second bypass branch to block the refrigerant fluid coming from the internal condenser, a second check valve arranged on the main loop to block the refrigerant fluid coming from the evaporator/condenser, and a device for redirecting fluid coming from the first expansion device towards the heat exchanger of the third bypass branch or the evaporator/condenser.

TRANSPORT CLIMATE CONTROL SYSTEM WITH AUXILIARY COOLING

A transport climate control system for a climate controlled transport unit includes a main heat transfer circuit and a chiller heat transfer circuit. The main heat transfer circuit includes a compressor, a condenser, a main expansion valve, a main evaporator, a chiller expansion valve, and a chiller evaporator. The main evaporator and a chiller evaporator positioned are in parallel to each other downstream of the condenser. Working fluid and a second process fluid flowing through the main evaporator. Working fluid and a third process fluid flowing through the chiller evaporator. The chiller heat transfer circuit includes the chiller evaporator and the third process fluid is configured to provide auxiliary cooling. A method of operating a transport climate control system for a climate controlled transport unit includes operating in a HVACR and chiller mode, operating in a HVACR mode, and operating a chiller mode.

REFRIGERATION CYCLE DEVICE

This refrigeration cycle device comprises an evaporation pressure regulating part (20, 210) placed downstream of a plurality of evaporation parts (16, 18, 19) and regulating a refrigerant evaporation pressure in the plurality of evaporation parts (16, 18, 19). The plurality of evaporation parts (16, 18, 19) consist of at least three or more evaporation parts. One of the plurality of evaporation parts (16, 18, 19) is defined as a first evaporation part, and another one of the plurality of evaporation parts (16, 18, 19) is defined as a second evaporation part. An evaporation pressure regulating valve 20 is configured to be able to regulate the refrigerant evaporation pressure in the first evaporation part to either a higher value or a lower value than the refrigerant evaporation pressure in the second evaporation part.

REFRIGERATION APPLIANCE AND METHOD FOR OPERATING THE REFRIGERATION APPLIANCE

A method for operating a refrigeration appliance includes the steps of running a compressor and opening at least one of a first branch and a second branch, where the first branch has a first evaporator, the second branch has a second evaporator, and the first branch and the second branch are connected in parallel at inlets thereof. The method further determines, according to an ambient temperature, whether the first branch is open after the compressor is turned off and determines, based on the ambient temperature, whether the second branch is open after the compressor is turned off. 1. A method for operating a refrigeration appliance , which comprises the steps of:running a compressor;opening at least one of a plurality of branches connected in parallel at inlets thereof, wherein each of the branches having a corresponding evaporator; anddetermining, based on an ambient temperature, whether at least one of the branches is open after the compressor is turned off.2. The method according to claim 1 , wherein the branches include a first branch for cooling a first storage room that is a freezer claim 1 , and whether the first branch is open after the compressor is turned off is determined based on the ambient temperature.3. The method according to claim 1 , wherein the branches include a second branch for cooling a second storage room that contains a non-freezing temperature zone claim 1 , and whether the second branch is open after the compressor is turned off is determined based on the ambient temperature.4. The method according to claim 3 , wherein:a first ambient temperature range when the first branch is closed after closing of the compressor is wider than a second ambient temperature range when the second branch is closed after closing of the compressor; orthe first ambient temperature range when the first branch is closed after closing of the compressor is equal to the second ambient temperature range when the second branch is closed after closing of the ...

TRANSPORT REFRIGERATION UNIT WITH COMPRESSOR WITH CAPACITY MODULATION

A refrigeration system includes a high-pressure side scroll compressor (20, 120) having a primary suction port (48; 142) and an intermediate suction port (47; 146), an evaporator (136) having an inlet and an outlet, a primary compressor inlet flow path fluidly coupling the outlet of the evaporator (136) with both the primary suction port (48; 142) and the intermediate suction port (47; 146), and a control valve operable to direct a flow of fluid moving along the primary compressor inlet flow path to at least one of the primary suction port (48; 142) to the intermediate suction port (47; 146) in response to a mode of operation of the refrigeration system. A capacity of the compressor (20; 120) associated with the primary suction port (48; 142) is greater than a capacity of the compressor (20; 120) associated with the intermediate suction port (47; 146).

Cooling Device, a Test Chamber and a Method

A method for operating a cooling device, a cooling device and a test chamber having a cooling device, a temperature of at least −80° C. or lower being established at the heat exchanger by means of the cooling device having a cooling circuit comprising a refrigerant, a heat exchanger, an internal heat exchanger, a compressor, a condenser and a controllable expansion element of the cooling device, the refrigerant undergoing a phase transition in the heat exchanger, the refrigerant of a high-pressure side of the cooling circuit being cooled by means of the internal heat exchanger, the cooling of the refrigerant of the high-pressure side by means of the internal heat exchanger being used to reduce an evaporation temperature at the expansion element, a zeotropic refrigerant being used as refrigerant, the expansion element being controlled by means of a control device of the cooling device in such a manner that the refrigerant partially freezes during an expansion at the expansion element.

LOW ENERGY CONSUMPTION REFRIGERATION SYSTEM WITH A ROTARY PRESSURE EXCHANGER REPLACING THE BULK FLOW COMPRESSOR AND THE HIGH PRESSURE EXPANSION SYSTEM

A refrigeration system includes a gas cooler or a condenser configured to reject first heat from a first fluid that is at a first pressure and that is in a supercritical state or subcritical state. The refrigeration system further includes an evaporator configured to absorb second heat into a second fluid that is at a second pressure that is lower than the first pressure and that is in a liquid state, a vapor state, or a two-phase mixture of liquid and vapor. The refrigeration system further includes a rotary pressure exchanger configured to receive the first fluid from the gas cooler or the condenser, to receive the second fluid from the evaporator, and to exchange pressure, via a rotor of the rotary pressure exchanger, between the first fluid and the second fluid.

REFRIGERATION SYSTEM WITH SEPARATE FEEDSTREAMS TO MULTIPLE EVAPORATOR ZONES

A refrigeration system has: (a) a fluid tight circulation loop including a compressor, a condenser and an evaporator, the evaporator having at least three evaporator zones, each evaporator zone having an inlet port, the circulation loop being further configured to measure the condition of the refrigerant with a refrigerant condition sensor disposed within the evaporator upstream of the evaporator outlet port; and control the flow of refrigerant to the evaporator based upon the measured condition of the refrigerant within the evaporator, and (b) a controller for controlling the flow rate of refrigerant to the evaporator based upon the measured condition of the refrigerant within the evaporator upstream of the evaporator outlet port.

Refrigerant metering system and method

A refrigerant metering system/method incorporating a manual expansion valve (MEV), condenser isolation valve (CIV), flow isolation valve (FIV), and evaporator isolation valve (EIV) is disclosed. The MEV is configured to replace a conventional automated expansion valve (AEV) that controls a refrigerant flow valve (RFV) that is positioned in a heating, ventilation, and air conditioning (HVAC) system between a refrigerant condenser coil (RCC) and a refrigerant evaporator coil (REC) and permits manual metering of refrigerant by the RFV from the RCC to the REC and also allows complete shutoff of refrigerant flow by the RFV from the RCC to the REC. The MEV allows rapid HVAC repair and restoration of service where a replacement AEV is not readily available. The CIV/FIV/EIV are positioned in the refrigerant flow lines to permit the AEV and/or REC to be isolated from HVAC refrigerant flow for repairs to the AEV and/or REC.

Refrigeration apparatus

A refrigeration apparatus, comprising: a compressor, the compressor being provided with an air exhaust opening and an air return opening; a condenser, a first end of the condenser being connected to the air exhaust opening; an evaporator, a first end of the evaporator being connected to the air return opening, a throttling element being connected in series between a second end of the evaporator and a second end of the condenser; a first control valve, the first control valve being connected in series between the evaporator and the compressor; an air suction device, a gas port of the air suction device being connected between the first control valve and the air return opening; and a control device, the control device being connected to the compressor, the first control valve, and the air suction device.

VALVE COMPRISING A DUAL PISTON ASSEMBLY AND METHOD OF FORMING A VALVE

A valve for a refrigeration system and a method of forming a valve includes a dual piston assembly having an inner piston () and an outer piston () that are moveable relative to each other to control pressure equalization flow through the valve, and an adjustable control stem () engageable with the outer piston that enables a low fluid equalization flow when in a first position and a variably higher fluid equalization flow when in a variable second position. The inner piston has a plurality of bleed orifices () that are openable by movement of the outer piston relative to the inner piston. 1. A valve comprising:a dual piston assembly having an inner piston and an outer piston that are moveable relative to each other to control pressure equalization flow through the valve; andan adjustable control stem engageable with the outer piston that enables when the valve is opened with a large pressure differential a low fluid equalization flow across the valve when in a first position and a progressively increasing fluid equalization flow across the valve when adjusted to a variable second position,wherein the inner piston has a plurality of bleed orifices that are openable by movement of the outer piston relative to the inner piston,wherein the plurality of bleed orifices includes a first set of bleed orifices and a second set of bleed orifices that are openable by movement of the outer piston relative to the inner piston, the first set of bleed orifices being open during the low fluid equalization flow and the first set of bleed orifices and a variable portion of the second set of bleed orifices being open during the high fluid equalization flow.2. (canceled)3. The valve according to claim 1 , wherein the second set of bleed orifices are larger than the first set of bleed orifices.4. The valve according to further comprising a piston chamber and a pressurized gas port in fluid communication with the piston chamber.5. The valve according to further comprising a solenoid ...

Device for controlling the temperature of an external fluid, an operating method thereof, and a computer program product comprising such method instructions

A device for controlling the temperature of an external fluid. The device including a compressor for compressing an internal fluid, a first heat exchanger in a temperature control circuit for transferring thermal energy between the internal fluid and the external fluid. The device is further configured for use within a system for controlling the temperature of blood.

Heat pump

A device for heating by absorbing latent heat of solidification of water, including a compressor (1), a condenser (2) and multiple evaporators (E1, E2) connected in parallel, each evaporator (E1, E2) has an electronic expansion valve (D1, D2) at its inlet, a solenoid valve (V1, V2) at its outlet; after the evaporators (E1, E2) are connected in parallel, outlets of the evaporators (E1, E2) are connected to an inlet of the compressor (1) and inlets of the evaporators (E1, E2) are connected to an outlet of the condenser (2); an outlet of the compressor (1) is connected to an inlet of the condenser (2); the compressor (1), the condenser (2) and the multiple parallel evaporators (E1, E2) form a closed loop system through pipelines; there are circulating refrigerants in the closed loop system, and heating and deicing processes are realized through a circulation of refrigerants; the solenoid valves (V1, V2) at the outlets of the evaporators (E1, E2) are switched between opening or closing to realize ...

Refrigeration cycle apparatus

A refrigeration cycle apparatus includes a refrigerant circuit, by pipes, connecting a compressor, a flow switching device, a first heat exchanger, an expansion device, and a second heat exchanger. As refrigerant to be circulated through the refrigerant circuit, any one of a refrigerant having saturated gas temperature under standard atmospheric pressure that is higher than that of R32 and a refrigerant mixture mainly composed of the refrigerant is used. The refrigerant circuit includes an internal heat exchanger configured to exchange heat between the refrigerant flowing through a refrigerant-inlet side of the second heat exchanger and the refrigerant flowing through a refrigerant-outlet side of the second heat exchanger.

Cooling System and Control Method Therefor

The present application discloses a cooling system and a control method thereof; the cooling system includes a compressor unit, a condenser, a first solenoid valve, a second solenoid valve, a first throttle valve and a frequency converter; the second solenoid valve and the first throttle valve are connected with the first solenoid valve in parallel after being connected in series with each other; the compressor unit, the condenser, the first solenoid valve and the frequency converter are connected in series to form a first cooling loop; the compressor unit, the condenser, the second solenoid valve, the first throttle valve and the frequency converter are connected in series to form a second cooling loop; and the frequency converter is internally provided with a temperature detection module and a heat exchange module.

DUAL MASS COOLING PRECISION SYSTEM

Devices, systems, and methods are disclosed for cooling using both air and/or liquid cooling sub circuits. A vapor compression cooling system having both an air and liquid cooling sub circuit designed to service high sensible process heat loads that cannot be solely cooled by either liquid or air is provided.

Dome-loaded back pressure regulator with setpoint pressure energized by process fluid

A method of operating a thermal system including at least a compressor, a condenser, a flow control valve, and at least one heat exchanger connected in a closed fluid loop charged with refrigerant. The method includes: regulating refrigerant pressure at a selected point within the fluid loop using a pressure regulating apparatus including: a main pressure regulator including a dome in fluid communication with a diaphragm that seals directly against at least one process void and at least one vent void; and a pilot pressure regulator in fluid communication with the dome so as to provide fluid thereto at a setpoint pressure. The setpoint pressure is maintained by the pilot pressure regulator utilizing refrigerant tapped from the fluid loop The refrigerant is tapped from a point upstream of the main pressure regulator and tapped refrigerant is returned to the fluid loop downstream of the main pressure regulator.

TRANSPORTATION REFRIGERATION MODULAR UNIT

A transportation refrigeration assembly includes a modular heat exchanger unit that includes at least one absorption heat exchanger and at least one expansion device. A frame supports the modular heat exchanger unit. A first cooling air outlet is in fluid communication with the modular heat exchanger unit. A second cooling air outlet is in fluid communication with the modular heat exchanger unit.

Method of managing compressor start for transport refrigeration system

A method of managing a compressor start operation, the method includes controlling a valve disposed upstream of a compressor to lower a saturated suction temperature of a refrigerant to be below an ambient temperature while starting the compressor.

COOLING OPERATION CONTROL METHOD

The invention relates to a cooling operation control method providing increasing temperature value change range between the highest and lowest temperatures, reducing fluctuations in temperature value during change of ambience temperature and keeping it fixed operations and change of temperature at sensitive intervals at ambiences to be cooled.

Refrigeration system and method of refrigeration load control

A method of controlling a refrigeration system including a medium temperature refrigeration load and a low temperature refrigeration load. The method includes selectively bypassing refrigerant between a medium temperature suction group and a low temperature suction group via a bypass line using an electronic valve positioned in the bypass line. The method also includes controlling flow of refrigerant between the medium temperature suction group and the low temperature suction group via a controller communicatively coupled to the valve, and modulating the valve at any position between a closed position and a full open position to vary an amount of refrigerant flow between the medium temperature suction group and the low temperature suction group in response to determining, via the controller, one or both of a state of the medium temperature suction group and a state of the low temperature suction group.

Refrigeration system with separate feedstreams to multiple evaporator zones

A refrigeration system has: (a) a fluid tight circulation loop including a compressor, a condenser and an evaporator, the evaporator having at least three evaporator zones, each evaporator zone having an inlet port, the circulation loop being further configured to measure the condition of the refrigerant with a refrigerant condition sensor disposed within the evaporator upstream of the evaporator outlet port; and control the flow of refrigerant to the evaporator based upon the measured condition of the refrigerant within the evaporator, and (b) a controller for controlling the flow rate of refrigerant to the evaporator based upon the measured condition of the refrigerant within the evaporator upstream of the evaporator outlet port.

DOME-LOADED BACK PRESSURE REGULATOR WITH SETPOINT PRESSURE ENERGIZED BY PROCESS FLUID

A diaphragm pressure regulator includes: a body defining a process surface and including: an exhaust port having a discharge opening, and at least one vent void interconnecting the process surface and the exhaust port; and an inlet port, and at least one process void communicating with the process surface and the inlet port; a reference housing including a cavity defining a reference surface and a reference port in fluid communication with the cavity; and a diaphragm disposed between the body and the reference housing, the diaphragm movable between a first position engaged with the vent voids, and a second position wherein the membrane is not engaged with at least one of the vent voids, wherein a dome is defined between the cavity and the reference side of the diaphragm; and wherein the reference housing includes a sump configured to segregate liquid from the reference side of the diaphragm.

Transportation refrigeration modular unit

A transportation refrigeration assembly includes a modular heat exchanger unit that includes at least one absorption heat exchanger and at least one expansion device. A frame supports the modular heat exchanger unit. A first cooling air outlet is in fluid communication with the modular heat exchanger unit. A second cooling air outlet is in fluid communication with the modular heat exchanger unit.

Floating evaporator saturated suction temperature systems and methods

Systems and methods are provided and include a case controller for a refrigeration case of a refrigeration system. The case controller is configured to: determine an evaporator saturated suction temperature (SST) of an evaporator of the refrigeration case; control an evaporator pressure regulator of the refrigeration system based on a comparison of the evaporator SST with an evaporator saturated suction temperature (SST) setpoint; receive an air temperature value from an air temperature sensor associated with the refrigeration case; determine whether the air temperature value is within a predetermined range of an air temperature setpoint; and adjust the SST setpoint in response to the air temperature value being outside of the predetermined range of the air temperature setpoint.

Dual mass cooling precision system

Devices, systems, and methods are disclosed for cooling using both air and/or liquid cooling sub circuits. A vapor compression cooling system having both an air and liquid cooling sub circuit designed to service high sensible process heat loads that cannot be solely cooled by either liquid or air is provided.

Device for controlling the temperature of an external fluid, an operating method thereof, and a computer program product comprising such method instructions

A device for controlling the temperature of an external fluid. The device including a compressor for compressing an internal fluid, a first heat exchanger in a temperature control circuit for transferring thermal energy between the internal fluid and the external fluid. The device is further configured for use within a system for controlling the temperature of blood.

Thermal management systems for extended operation

Thermal management systems include an open circuit refrigeration system featuring a first receiver configured to store a gas, a second receiver configured to store a liquid refrigerant fluid, an evaporator configured to extract heat from a heat load that contacts the evaporator, and an exhaust line, where the first receiver, the second receiver, the evaporator, and the exhaust line are connected to provide a refrigerant fluid flow path.

REFRIGERATING APPARATUS

There is provided a refrigerating apparatus (100) that can be operated more stably. The refrigerating apparatus (100) includes a first compressor (1) and a second compressor (2) that are arranged in series on the main circuit (90), an intermediate heat exchanger (3), a condenser (4), a first expansion valve (5), a receiver (6), a second expansion valve (7), an evaporator (8), a three-way valve (9) provided between the intermediate heat exchanger (3) and the second compressor (2), a first bypass passage (10) that couples the three-way valve (9) and the receiver (6), a second bypass passage (11) that couples the receiver (6), the three-way valve (9), and the second compressor (2), a first solenoid valve (13) that switches over to an open state of the second bypass passage (10), and a second solenoid valve (11) that is provided between the receiver (6) and the second expansion valve (7) and switches over to an open state of the main circuit (90).

SYSTEMS AND METHODS OF USING CASCADING HEAT PUMPS FOR IMPROVEMENT OF COEFFICIENT OF PERFORMANCE

A system utilizing cascading heat pump circuits (HPCs) is employed to efficiently transfer heat from low temperature reservoirs to high temperature reservoirs. The system of cascading (e.g., multistage) HPCs include at least two HPCs that are in thermal communication. The first HPC uses a first refrigerant and is configured to raise a first cold operating temperature to a first hot operating temperature. The second HPC uses a second refrigerant and is configured to raise a second cold operating temperature to a second hot operating temperature. The second HPC is in thermal communication with the first HPC through a thermal exchange block, which allows the transfer of heat between the HPCs and causes the first hot temperature to be equilibrated with the second cold temperature. The cascading HPC system also includes a system controller that is configured to optimize the coefficient of performance (COP) of the cascading HPC system.

TRANSPORTATION REFIGERATION SYSTEM

A transportation refrigeration unit (TRU) system is provided and includes a damper assembly configured to direct air flows through first or second pathways and an evaporator disposed in the first pathway, a coil element surrounded by phase change material (PCM) and disposed in the second pathway and a routing assembly configured to direct refrigerant through the evaporator or the coil element. With the PCM pre-cooled, the damper and routing assemblies are controllable to respectively direct the air flows through the first pathway and the refrigerant through the evaporator when first conditions are met and to respectively direct the air flows through the second pathway when second conditions are met.

Active control alternating-direct flow hybrid mechanical cryogenic system

The disclosed subject matter includes an active control alternating-direct flow hybrid mechanical cryogenic system, and relates to the field of cryogenic refrigeration technologies. The active control alternating-direct flow hybrid mechanical cryogenic system includes a main compressor, a Stirling cold finger, an intermediate heat exchanger, a pulse tube cold finger, a first dividing wall type heat exchanger, a final precooled heat exchanger, a second dividing wall type heat exchanger, and an evaporator that are communicated successively, where the second dividing wall type heat exchanger is connected to the evaporator through a second connecting pipeline, and a throttling element is disposed on the second connecting pipeline; a pulse tube cold head of the pulse tube cold finger is communicated with the final precooled heat exchanger through a cold chain; and a check valve is disposed on the intermediate heat exchanger.

HEAT PUMP REFRIGERANT LOOP ARRANGEMENTS

A heat pump includes a refrigerant loop. The refrigerant loop includes a compressor, a first condenser, a vapor generator having a first region and a second region, a first expansion valve, a second expansion valve, and a first evaporator. A branching point is positioned between the first condenser and the vapor generator. The branching point diverts a portion of a first heat exchange fluid circulating through the refrigerant loop to the vapor generator. The first expansion valve is positioned between the branching point and the vapor generator. An outlet vapor generator is coupled to a mid-pressure inlet port of the compressor.

AIR CONDITIONER

An air conditioner includes a bypass pipe connecting a first bypass branch of a first connection pipe, through which high-pressure refrigerant flows, with a second bypass branch of a third connection pipe, through which low-pressure refrigerant flows, to allow bypassing of high-pressure refrigerant in the first connection pipe to the third connection pipe, and a bypass valve mounted in the bypass pipe. During a cooling operation of an indoor unit, the bypass valve is opened to allow bypassing of high-pressure refrigerant of the first connection pipe to the third connection pipe.

REFRIGERATION APPARATUS

To provide a refrigeration apparatus capable of regulating a refrigerant amount while achieving downsizing and weight reduction. A refrigeration apparatus 1 includes: a refrigerator 10 including a compressor 30 and a heat exchanger configured to perform heat exchange of a refrigerant discharged from the compressor 30; a cooling apparatus including an evaporator 40 and an inlet expansion valve 42 disposed at an inlet of the evaporator 40; and a refrigerant regulating valve disposed at an outlet of the evaporator 40, the refrigerant regulating valve being configured to regulate a refrigerant flow rate.

HOT GAS DEFROST USING MEDIUM TEMPERATURE COMPRESSOR DISCHARGE

A refrigeration system (100) includes an expansion valve (142) downstream of one or more medium temperature compressors (120). The expansion valve (142) is configured to decrease pressure of a portion of refrigerant output by the one or more medium temperature compressors (120). When defrost operation of an evaporator (116) is indicated, the refrigerant with decreased pressure from the expansion valve (142) is provided to the evaporator (116) for at least a period of time sufficient to defrost the evaporator (116).

REFRIGERATION SYSTEM AND METHOD OF REFRIGERATION LOAD CONTROL

A method of controlling a refrigeration system including a medium temperature refrigeration load and a low temperature refrigeration load. The method includes selectively bypassing refrigerant between a medium temperature suction group and a low temperature suction group via a bypass line using an electronic valve positioned in the bypass line. The method also includes controlling flow of refrigerant between the medium temperature suction group and the low temperature suction group via a controller communicatively coupled to the valve, and modulating the valve at any position between a closed position and a full open position to vary an amount of refrigerant flow between the medium temperature suction group and the low temperature suction group in response to determining, via the controller, one or both of a state of the medium temperature suction group and a state of the low temperature suction group. 1. A method of controlling a refrigeration system including a medium temperature refrigeration load and a low temperature refrigeration load , the refrigeration system further including a medium temperature suction group having a suction header and a medium temperature compressor assembly operable at a first suction pressure setpoint in a normal refrigeration mode , and a low temperature suction group having a suction header and a low temperature compressor assembly operable at a second suction pressure setpoint in a normal refrigeration mode , the method comprising:selectively bypassing refrigerant between the medium temperature suction group and the low temperature suction group via a bypass line using an electronic valve positioned in the bypass line;controlling flow of refrigerant between the medium temperature suction group and the low temperature suction group via a controller communicatively coupled to the valve, the controller further communicatively coupled to a first sensor in communication with the medium temperature suction group to detect a medium ...

HOT GAS DEFROST USING DEDICATED LOW TEMPERATURE COMPRESSOR DISCHARGE

A refrigeration system (100) includes a dedicated defrost-mode compressor (144) that delivers high pressure, high temperature refrigerant to one or more evaporator units (110a, 124a) to defrost the evaporator units.

A COOLING SYSTEM WITH MULTIPLE COOLING LINES WITH A CONFIGURED CONTROLLER

Described is a cooling system comprising a compressor (31), a condenser (32) and at least a first evaporator (34) and a second evaporator (35) connected in parallel with the first evaporator. A refrigerant is circulated in the cooling system. Further a controller (40) is provided and configured to control the flow of refrigerant to and/ or from at least one of said first evaporator and second evaporator based on the superheat of said at least one of the first evaporator and second evaporator. Hereby a control algorithm that is stable and at the same time enables fast switching in the refrigerant flow is achieved.

Fast switching multiple evaporator system for an appliance

Various embodiments of a multi-evaporator sealed vapor compression system for an appliance are provided. In one example aspect, a sealed system charged with a refrigerant fluid includes a single compressor and a first and second evaporator fluidly coupled in series. A flash tank is positioned between the evaporators. One or more valves are fluidly coupled with and positioned downstream of the flash tank and the second evaporator. The valves are operable to selectively switch the flow of refrigerant fluid between the two evaporators at a frequency such that the temperature rise in the evaporators is negligible. In another aspect, a sealed system charged with a refrigerant fluid includes a single compressor and a first and second evaporator fluidly coupled in parallel. One or more valves positioned upstream of the evaporators and one or more valves are positioned downstream of the evaporators for controlling the refrigerant flow through the sealed system.

Vapor compression refrigeration system capable of operating in transcritical mode and method of operating such a system

A vapor compression refrigeration system has a main refrigerant circuit having a primary compressor group, a gas cooler or condenser, an expansion device, a liquid receiver, and at least one evaporator. An emergency circulation duct fluidically connects the liquid receiver to the main circuit to allow a flow of refrigerant from the liquid receiver to the gas cooler. An emergency compressor group in the emergency circulation duct is activatable when pressure inside the liquid receiver or in the duct upstream of the emergency compressor group meets or exceeds a predefined emergency pressure threshold. An uninterruptible power supply powers the emergency compressor group and expansion device during a shutdown of the refrigeration system. When pressure inside the liquid receiver or in the duct upstream of the emergency compressor group equals or exceeds the predefined emergency pressure threshold, an emergency circulation of refrigerant fluid is activated through the emergency circulation duct ...

Refrigeration circuit

Refrigeration circuit (1a) comprising in the direction of flow of a circulating refrigerant: a compressor unit (2) comprising at least one compressor (2a, 2b, 2c); a heat rejecting heat exchanger/gas cooler (4); a high pressure expansion device (6); a receiver (8); an expansion device (10); an evaporator (12); and a low pressure gas-liquid-separation unit comprising at least two collecting containers (32, 34) which are configured for alternately separating a liquid phase portion from the refrigerant leaving the evaporator (12) and delivering the separated liquid refrigerant back to the receiver (8).

Refrigeration cycle apparatus

A first valve is connected between a compressor and a first heat exchanger. A second valve is connected between the first heat exchanger and a expansion valve. When a start condition of the heating operation is satisfied and when a specific condition is satisfied, a controller starts supplying refrigerant from the compressor to the first valve, and then, opens the first and second valves. The specific condition is a condition indicating that a first heat exchange capability of the first heat exchanger is higher than a second heat exchange capability of a second heat exchanger. When the start condition of the heating operation is satisfied and when the specific condition is not satisfied, the controller opens the first and second valves, and then starts supplying the refrigerant from the compressor to the first valve.

BIMODAL COOLING SYSTEM

Cooling systems and methods of operation are provided. The cooling system may comprise a two-phase pumped loop (TPPL). The two-phase pumped loop may include, a receiver, a pump downstream from the receiver, a heat load downstream from the pump, a TPPL tee downstream from the heat load, a TPPL check valve downstream from the TPPL tee, and a heat exchanger downstream from the TPPL check valve and upstream from the receiver. The cooling system may further include a vapor cycle system (VCS) loop. The vapor cycle system loop may include the receiver, a compressor downstream from a vapor outlet of the receiver, a compressor check valve downstream from the compressor and upstream of the heat exchanger, the heat exchanger, and the heat load downstream from a liquid outlet of the receiver.

Method and apparatus for hybrid dehumidification

An evaporator coil system includes a segmented evaporator coil. The segmented evaporator coil includes a primary segment and a secondary segment. A first plurality of evaporator circuit lines are fluidly coupled to the primary segment and a second plurality of evaporator circuit lines are fluidly coupled to the secondary segment. A suction line includes a first connection fluidly coupled to the primary segment and a second connection fluidly coupled to the secondary segment. A valve is arranged in fluid communication with the secondary segment so as to selectively restrict refrigerant flow through the secondary segment.

HOT GAS DEFROST USING MEDIUM TEMPERATURE DISCHARGE GAS

A refrigeration system includes evaporators, one or more medium temperature compressors, and a three-way valve positioned downstream from the one or more medium temperature compressors. The three-way valve receives the compressed refrigerant from the medium temperature compressors and directs flow of the received compressed refrigerant to (i) a gas cooler and/or (ii) one or more of the evaporators based on an operation mode of the evaporators. A controller determines that operation of a first evaporator in a defrost mode is indicated and causes the first evaporator to operate in the defrost mode by adjusting the three-way valve to direct a portion of the received compressed refrigerant to the first evaporator.

METHOD OF MANAGING COMPRESSOR START FOR A TRANSPORT REFRIGERATION SYSTEM AND CORRESPONDING TRANSPORT REFRIGERATION SYSTEM

HEAT PUMP WITH EJECTOR

COOLING SYSTEM WITH COMPRESSOR BYPASS

A cooling system is designed to generally allow for one or more compressors to be bypassed when ambient temperatures are low. The system includes a bypass line and valve that opens when ambient temperatures are low and/or when the pressure of the refrigerant in the system is low. In this manner, the refrigerant can flow through the bypass line instead of through one or more compressors. These compressors may then be shut off. To supply any needed pressure to cycle the refrigerant, the system may include a pump that turns on when the bypass line is open. When ambient temperatures are extremely low, thermosiphon may be used to cycle the refrigerant.

Refrigerator

A refrigerator includes a main body that has a storage chamber and a drying chamber; a thermoelectric module that includes a heat absorber and a heat dissipater; a cooling fan that circulates air in the storage chamber to the heat absorber and the storage chamber; a heat-dissipating fan that blows air to the heat dissipater; an air guide that has a passage for guiding air heated by the heat dissipater to the drying chamber; a heater that is disposed in the passage; and a damper that controls a flow of air in the passage between the heat-dissipating fan and the heater. Heat of the heat dissipater transfers to the drying chamber through the passage of the air guide and the damper, thereby being able to dry an object to be dried.

METHOD AND APPARATUS FOR HYBRID DEHUMIDIFICATION

An evaporator coil system includes a segmented evaporator coil. The segmented evaporator coil includes a primary segment and a secondary segment. A first plurality of evaporator circuit lines are fluidly coupled to the primary segment and a second plurality of evaporator circuit lines are fluidly coupled to the secondary segment. A suction line includes a first connection fluidly coupled to the primary segment and a second connection fluidly coupled to the secondary segment. A valve is arranged in fluid communication with the secondary segment so as to selectively restrict refrigerant flow through the secondary segment. 1. An evaporator coil system , comprising:a segmented evaporator coil comprising a primary segment and a secondary segment;a suction line having a first connection fluidly coupled to the primary segment and a second connection fluidly coupled to the secondary segment;a valve arranged on a discharge side of the segmented evaporator coil, wherein the valve is arranged upstream of the first connection and downstream of the second connection; andthe valve being in fluid communication with the secondary segment so as to selectively restrict refrigerant flow through the secondary segment while allowing flow of refrigerant through the primary segment.2. The evaporator coil system of claim 1 , comprising:a first plurality of evaporator circuit lines fluidly coupled to the primary segment; anda second plurality of evaporator circuit lines fluidly coupled to the secondary segment.3. The evaporator coil system of claim 2 , comprising:a first distributor fluidly coupled to the first plurality of evaporator circuit lines; anda second distributor fluidly coupled to the second plurality of evaporator circuit lines.4. The evaporator coil system of claim 1 , wherein the valve is arranged downstream of the secondary segment and upstream of the primary segment.5. The evaporator coil system of claim 1 , wherein the valve restricts flow of refrigerant through the ...

OIL CONTROL SYSTEM AND METHOD FOR HVAC SYSTEM

A HVAC system that includes a compressor comprising a suction port and a discharge port. Also included is a refrigerant circulating throughout the HVAC system and through the compressor. Further included is a pressure equalization valve fluidly coupling the discharge port of the compressor with the suction port of the compressor, the pressure equalization valve configured to open while the compressor is operating.

Oil control system and method for HVAC system

A HVAC system that includes a compressor comprising a suction port and a discharge port. Also included is a refrigerant circulating throughout the HVAC system and through the compressor. Further included is a pressure equalization valve fluidly coupling the discharge port of the compressor with the suction port of the compressor, the pressure equalization valve configured to open while the compressor is operating.

COOLING SYSTEM WITH PARALLEL COMPRESSION USING MEDIUM TEMPERATURE COMPRESSORS

A cooling system (200) is designed to operate in two different modes. Generally, in the first mode, when parallel compression is needed, certain valves (208, 214, 212) are controlled to direct gaseous refrigerant from a tank (104) to a compressor (112A) in the system and to direct refrigerant from low side heat exchangers (110A, 110B) towards other compressors (112B). In this manner, a compressor in the system is transitioned to be generally a parallel compressor. In the second mode, when parallel compression is not needed, the valves are controlled to return the refrigerant flow back to normal.

Method of control for economizer of transport refrigeration units

A method of operating a refrigeration system includes initiating a compressor shutdown operation, determining a difference in a saturation temperature at a port of a compressor of the refrigeration system and an ambient temperature and comparing the difference in the saturation temperature and ambient temperature with a threshold. If the difference in the saturation temperature and ambient temperature is less than or equal to the threshold, a pump down operation is performed and if the difference in the saturation temperature and ambient temperature exceeds the threshold, a compressor shutdown operation is completed.

DEVICE FOR CONTROLLING THE TEMPERATURE OF AN EXTERNAL FLUID, AN OPERATING METHOD THEREOF, AND A COMPUTER PROGRAM PRODUCT COMPRISING SUCH METHOD INSTRUCTIONS

A device for controlling the temperature of an external fluid. The device including a compressor for compressing an internal fluid, a first heat exchanger in a temperature control circuit for transferring thermal energy between the internal fluid and the external fluid. The device is further configured for use within a system for controlling the temperature of blood.

Refrigeration Systems with a First Compressor System and a Second Compressor System

A refrigeration system includes a first compressor system, a second compressor system, a first conduit, a heat exchanger, a second conduit, and a third conduit. The first compressor system includes a plurality of first compressors. The second compressor system includes a plurality of second compressors. The first conduit is configured to provide refrigerant from the first compressor system to the second compressor system. The second conduit is fluidly coupled to the first conduit and configured to provide the refrigerant from the first compressor system to the heat exchanger. The third conduit is configured to provide the refrigerant from the second compressor system to the heat exchanger.

Transportation refrigeration system

A transportation refrigeration unit (TRU) system is provided and includes a damper assembly configured to direct air flows through first or second pathways and an evaporator disposed in the first pathway, a coil element surrounded by phase change material (PCM) and disposed in the second pathway and a routing assembly configured to direct refrigerant through the evaporator or the coil element. With the PCM pre-cooled, the damper and routing assemblies are controllable to respectively direct the air flows through the first pathway and the refrigerant through the evaporator when first conditions are met and to respectively direct the air flows through the second pathway when second conditions are met.

METHOD AND SYSTEM FOR IMPULSE AND CYCLIC TRANSFER OF HEAT THROUGH A HEAT-TRANSFERRING WALL

The invention is an impulse system and a method for heat transfer in thermal nonequilibrium state through a heat-transferring wall of a heat transferring volume. The system is based on a heat transferring volume and an impulse device in fluid, pressure and thermal communication with each other, where the impulse device delivers a heat load to the heat transferring volume through a working medium in condensed phase impulses. The impulse device controls the rate of delivery of impulses such that each subsequent impulse is received before the heat capacity of the heat transferring wall returns to an equilibrium state thereby resulting in an accumulation of the changes in heat capacity of the heat transferring wall and subsequent changes in the temperature of the heat-transferring wall above or below the wall thermal equilibrium state to increase the heat transfer flow through the wall.

Gas-liquid separator and air conditioner having the same

Provided is a gas-liquid separator, including a connection pipe connected to a refrigerant pipe in the evaporator, the refrigerant pipe in which a two-phase refrigerant flows, a header connected to the connection pipe, wherein a gas refrigerant separated from the two-phase refrigerant flows inside the header, a bypass pipe connected to the header to guide a flow of the gas refrigerant to a compressor, a flow rate control valve installed at the bypass pipe, and a controller configured to control opening and closing of the flow rate control valve based on whether a preset condition is satisfied.

Air conditioner

An air conditioner includes a bypass pipe connecting a first bypass branch of a first connection pipe, through which high-pressure refrigerant flows, with a second bypass branch of a third connection pipe, through which low-pressure refrigerant flows, to allow bypassing of high-pressure refrigerant in the first connection pipe to the third connection pipe, and a bypass valve mounted in the bypass pipe. During a cooling operation of an indoor unit, the bypass valve is opened to allow bypassing of high-pressure refrigerant of the first connection pipe to the third connection pipe.

Refrigerator

A valve structure that may control the flow rate of a fluid when the fluid starts to be released is provided. In a valve structure including a valve sheet having two outlets to release a fluid and a valve body arranged to be rotational against the valve sheet to regulate a degree of opening of the outlet, the valve body has a fluid control recess formed in the circumferential direction whose area overlapping the outlet is changed by rotation of the valve body, and the center of the outlet is forced to deviate from a rotation trajectory of a front end portion of the fluid control recess that starts to overlap the outlet by the rotation of the valve body.

Floating Evaporator Saturated Suction Temperature Systems And Methods

Systems and methods are provided and include first and second case controllers for first and second refrigeration cases. The first case controller receives a first air temperature value of the first refrigeration case and communicates the first air temperature value to the second case controller. The second case controller receives a second air temperature value, determine an evaporator saturated suction temperature (SST) value, controls an evaporator pressure regulator based on a comparison of the evaporator SST value with an evaporator SST setpoint, determines an air temperature control value, determines whether the air temperature control value is within a predetermined range of an air temperature setpoint, and adjusts the evaporator SST setpoint in response to the air temperature control value being outside of the predetermined range of the air temperature setpoint.

Heat source unit and refrigeration apparatus

If a first condition that an intermediate pressure corresponding to a pressure of an intermediate flow path is greater than a predetermined value is satisfied in an operation in which first, second, and third compressors are operated, the control unit executes a first action of increasing the number of revolutions of the third compressor.

THERMAL CONDITIONING DEVICE FOR A MOTOR VEHICLE

REGULATION METHOD AND REGULATION APPARATUS OF A REFRIGERATION PLANT AND RESPECTIVE REFRIGERATION PLANT INCLUDING SUCH APPARATUS

Described is a regulation apparatus for a refrigeration plant having defined therein a refrigerant fluid path and a plurality of devices arranged along the refrigerant fluid path. The regulation apparatus includes a first sensor arranged in a first point (P1) and a second sensor arranged in a second point (P3), each along the fluid path of the refrigeration plant, a control unit and an actuation device. The control unit controls a first value measured by the first sensor and obtains a first regulation request deriving from the first measured value as well as a second value measured by the second sensor and derives a second regulation request deriving from the second measured value, compares the first and second regulation requests, and establishes which regulation request is greater. The control unit also commands the actuation device to actuate the most effective regulation request of the refrigeration plant devices.

Valve Device for a Heat-Pump System, Heat-Pump-System Having Such a Valve Device, and Building Having Such a Valve Device or Such a Heat-Pump System

A valve device for a heat-pump system, having an electrical actuator arranged in or on the valve-device housing a first valve body and a second valve body are arranged in the valve-device housing of the valve device, and a heat-pump-system having such a valve device, and to a building having such a heat-pump system or such a valve device.

METHOD AND SYSTEM TO VARY SUCTION TEMPERATURE TO POSTPONE FROST FORMATION

A cooling system includes an evaporator coil and a compressor fluidly coupled to the evaporator coil. A circulation fan is arranged to direct air through the evaporator coil and through a discharge air duct into a conditioned space. At least one sensor is disposed in at least one of the discharge air duct, the conditioned space, and the evaporator coil. An HVAC controller is electrically coupled to the at least one sensor and electrically coupled to the compressor. The HVAC controller is configured to receive a measurement of an HVAC parameter from the at least one sensor, determine if the HVAC parameter indicates frost formation on the evaporator coil, and, responsive to a determination that the HVAC parameter indicates frost formation on the evaporator coil, raise a saturated suction temperature of the evaporator coil.

Thermal management system with dual-use serial thermal energy storage for system size reduction

Thermal management systems for cooling high-power, low-duty-cycle thermal loads by rejecting heat from the thermal loads to the ambient environment are provided. The thermal management systems include a two-phase pump loop in fluid communication with a vapor compression system loop, evaporators disposed in parallel between the two-phase pump loop and the vapor compression system loop, and a thermal energy storage loop including a cold-temperature tank and a warm-temperature tank thermally coupled to the two-phase pump loop and the vapor-compression system loop. Methods of transferring heat from one or more thermal loads to an ambient environment are also provided.

Refrigeration systems with a first compressor system and a second compressor system

A refrigeration system includes a first compressor system, a second compressor system, a first conduit, a heat exchanger, a second conduit, and a third conduit. The first compressor system includes a plurality of first compressors. The second compressor system includes a plurality of second compressors. The first conduit is configured to provide refrigerant from the first compressor system to the second compressor system. The second conduit is fluidly coupled to the first conduit and configured to provide the refrigerant from the first compressor system to the heat exchanger. The third conduit is configured to provide the refrigerant from the second compressor system to the heat exchanger.

HVAC UNIT WITH EXPANSION DEVICE

An outdoor HVAC unit includes a housing. A compressor is located within the housing. A heat exchanger is located within the housing and is in fluid communication with the compressor. At least one expansion device is located within the housing and is in fluid communication with the heat exchanger. 1. An outdoor HVAC unit comprising:a housing;a compressor located within the housing;a heat exchanger located within the housing and in fluid communication with the compressor; andat least one expansion device located within the housing and in fluid communication with the heat exchanger.2. The unit of claim 1 , further comprising at least one isolation valve in fluid communication with the compressor.3. The unit of claim 2 , wherein the isolation value is fluidly upstream of the compressor and the at least one expansion device is fluidly downstream of the heat exchanger.4. The unit of claim 3 , wherein the heat exchanger is a condenser.5. The unit of claim 1 , wherein the at least one expansion device includes a plurality of expansion devices each in fluid communication with the heat exchanger.6. The unit of claim 5 , further comprising a plurality of liquid refrigerant lines in fluid communication with the heat exchanger and a corresponding one of the plurality of expansion devices.7. The unit of claim 6 , wherein the plurality of liquid lines are located within the housing.8. The unit of claim 1 , wherein the outdoor unit operates with an A2L refrigerant.9. A refrigeration system comprising:an outdoor housing;a compressor located within the outdoor housing;a first heat exchanger located within the outdoor housing and in fluid communication with the compressor;at least one expansion device located within the outdoor housing and in fluid communication with the heat exchanger; andat least one second heat exchanger located fluidly between the at least one expansion device and the compressor.10. The system of claim 9 , wherein the second heat exchanger is located within an ...

SYSTEMS AND METHODS FOR HEAT EXCHANGE

The present disclosure provides methods and systems for heat exchange, such as cooling a heat source. A cooling system of the present disclosure may comprise a first channel that is configured to direct a liquid coolant, a second channel that is configured to direct a vapor coolant generated from the liquid coolant, and a condenser that is configured to permit the vapor coolant to undergo phase transition to the liquid coolant. The cooling system may further comprise at least one cooling interface in fluid communication with the first channel and the second channel. The cooling interface may be configured to facilitate heat exchange between the liquid coolant and a heat source.

A METHOD FOR CONTROLLING SUCTION PRESSURE OF A VAPOUR COMPRESSION SYSTEM

A method for controlling a vapour compression system (1) is disclosed. The vapour compression system (1) includes an ejector (4), and has a non-return valve (11) arranged in the refrigerant path between an outlet (12) of an evaporator (7) and an inlet (10) of a compressor unit (2), in such a manner that a refrigerant flow from the outlet (12) of the evaporator (7) towards the inlet (10) of the compressor unit (2) is allowed, while a fluid flow from the inlet (10) of the compressor unit (2) towards the outlet (12) of the evaporator (7) is prevented. A pressure, P0, of refrigerant leaving the evaporator (7) is measured and a value being representative for a pressure, Psuc, of refrigerant entering the compressor unit (2) is obtained. The pressures, P0and Psuc, are compared to respective reference pressure values, P0,refand Psuc,ref. In the case that ε0>εsuc, where ε0=P0−P0,refand εsuc=Psuc−Psuc,ref, the compressor unit (2) is controlled based on P0, and in the case that εsuc>ε0, the compressor ...

Refrigerant metering refrigerant evaporator coil (REC) repair method

A refrigerant metering system/method incorporating a manual expansion valve (MEV), condenser isolation valve (CIV), flow isolation valve (FIV), and evaporator isolation valve (EIV) is disclosed. The MEV is configured to replace a conventional automated expansion valve (AEV) that controls a refrigerant flow valve (RFV) that is positioned in a heating, ventilation, and air conditioning (HVAC) system between a refrigerant condenser coil (RCC) and a refrigerant evaporator coil (REC) and permits manual metering of refrigerant by the RFV from the RCC to the REC and also allows complete shutoff of refrigerant flow by the RFV from the RCC to the REC. The MEV allows rapid HVAC repair and restoration of service where a replacement AEV is not readily available. The CIV/FIV/EIV are positioned in the refrigerant flow lines to permit the AEV and/or REC to be isolated from HVAC refrigerant flow for repairs to the AEV and/or REC.

Control method and control device for variable-frequency and variable-capacity heat pump hot-air drying system

A control method and control device for a heat pump-type double-circulation hot-air drying system, relating to a device for supplying or controlling air or gas for drying solid materials or products, and in particular to a control method and control device for a heat pump-type hot-air drying system. The method comprises: configuring a temperature control parameter, and saving a preset temperature control curve parameter; detecting and monitoring an outlet air temperature, and the temperature and humidity of a drying room; dynamically adjusting a set temperature according to a preset temperature control curve; and selecting, according to a current set temperature, a double-circulation dynamic operation mode of a system. The control device uses a micro-processor to realize program control. By building an inner circulation loop for large-volume air circulation, the latent heat of condensation in a refrigerant is fully absorbed, to improve the basic air temperature.

HEAT SOURCE UNIT AND REFRIGERATION APPARATUS

If a first condition that an intermediate pressure corresponding to a pressure of an intermediate flow path is greater than a predetermined value is satisfied in an operation in which first, second, and third compressors are operated, the control unit executes a first action of increasing the number of revolutions of the third compressor.

Cooling system

A system includes a flash tank, a first load, a second load, a first compressor, a second compressor, a first valve, and a second valve. The flash tank stores a refrigerant. The first and second loads use the refrigerant to cool first and second spaces. The first compressor compresses the refrigerant from the first load during a first mode of operation and a flash gas from the flash tank during a second mode of operation. The second compressor compresses a mixture of the refrigerant from the first and second loads during the first mode of operation. The first valve directs the flash gas from the flash tank to the first compressor during the second mode of operation. The second valve directs the compressed flash gas from the first compressor to the first load during the second mode of operation to defrost the first load.

Thermal management systems

A thermal management system includes an integrated open-circuit refrigeration system and closed-circuit heat pump system. The thermal management system includes a receiver having a first receiver port and a second receiver port, the receiver configured to store a refrigerant fluid, an evaporator having a first evaporator port and a second evaporator port, the heat pump circuit having a closed-circuit fluid path with the receiver and the evaporator and an open-circuit refrigeration system configured to receive refrigerant from the receiver, with the open-circuit refrigeration system having an open-circuit fluid path that includes the receiver and the evaporator.

Cooling system with compressor bypass

A cooling system is designed to generally allow for one or more compressors to be bypassed when ambient temperatures are low. The system includes a bypass line and valve that opens when ambient temperatures are low and/or when the pressure of the refrigerant in the system is low. In this manner, the refrigerant can flow through the bypass line instead of through one or more compressors. These compressors may then be shut off. To supply any needed pressure to cycle the refrigerant, the system may include a pump that turns on when the bypass line is open. When ambient temperatures are extremely low, thermosiphon may be used to cycle the refrigerant.

Dual mass cooling precision system

Devices, systems, and methods are disclosed for cooling using both air and/or liquid cooling sub circuits. A vapor compression cooling system having both an air and liquid cooling sub circuit designed to service high sensible process heat loads that cannot be solely cooled by either liquid or air is provided.

COMPRESSOR AND HEAT EXCHANGE SYSTEM

A compressor and a heat exchange system are provided. The compressor has a sealed container and a liquid storage tank. An outlet end of the liquid storage tank is connected to an inlet end of the sealed container. An outlet end of the sealed container and an inlet end of the liquid storage tank are connected to an external heat exchange loop. A motor and a compression mechanism of the compressor are mounted in the sealed container. A first valve of the compressor is mounted at the outlet end of the sealed container and allows unidirectional communication from the sealed container to the external heat exchange loop. A second valve of the compressor is mounted at the inlet end of the liquid storage tank and allows unidirectional communication from the external heat exchange loop to the liquid storage tank.

Refrigerant metering system and method

A refrigerant metering system/method incorporating a manual expansion valve (MEV), condenser isolation valve (CIV), flow isolation valve (FIV), and evaporator isolation valve (EIV) is disclosed. The MEV is configured to replace a conventional automated expansion valve (AEV) that controls a refrigerant flow valve (RFV) that is positioned in a heating, ventilation, and air conditioning (HVAC) system between a refrigerant condenser coil (RCC) and a refrigerant evaporator coil (REC) and permits manual metering of refrigerant by the RFV from the RCC to the REC and also allows complete shutoff of refrigerant flow by the RFV from the RCC to the REC. The MEV allows rapid HVAC repair and restoration of service where a replacement AEV is not readily available. The CIV/FIV/EIV are positioned in the refrigerant flow lines to permit the AEV and/or REC to be isolated from HVAC refrigerant flow for repairs to the AEV and/or REC.

Control and switch design for multiple phase change loops

A cooling system includes an evaporator, connected through fluid lines to a first condenser, a second condenser, a compressor, and a thermal expansion valve. One or more valves are arranged in the fluid lines. The one or more valves operated to, in a first mode, circulate fluid between the evaporator the first condenser; in a second mode, circulate the fluid between a) the evaporator and the first condenser, and b) the evaporator, the second condenser, and the thermal expansion valve, and; in a third mode, circulate the fluid between a) the evaporator and the first condenser, and c) the evaporator, the compressor, the second condenser, and the thermal expansion valve.

AIR CONDITIONING SYSTEM AND COOLING METHOD FOR DRIVE MOTOR THEREOF

An air conditioning system includes a main circuit having a multi-stage compressor, a condenser, a throttling element and an evaporator connected by pipelines; and a cooling branch, the inlet of which is connected to the main circuit between the condenser and the throttling element, and the outlet of which is connected to at least one of the first-stage suction port and the intermediate-stage suction port of the multi-stage compressor, wherein the cooling branch flows through the drive motor of the multi-stage compressor, and a regulating valve for controlling the opening of the cooling branch is provided on the cooling branch; and a control module that controls the opening of the regulating valve on the cooling branch based on the temperature of the outlet downstream of the drive motor on the cooling branch and the intermediate suction pressure of the intermediate-stage suction port of the multi-stage compressor.

Semi-open high-temperature heat pump system and working method thereof

A semi-open high-temperature heat pump system including a compressor, a direct-contact condenser, a heat exchanger, an evaporator, a water purifier, a cold water pump, a hot water pump, a circulating water pump, and a vacuum pump. A discharge port of the compressor is connected to the direct-contact condenser, the direct-contact condenser is connected to the evaporator via the heat exchanger, and the evaporator is connected to a gas suction port of the compressor via a gas vent on its top. An outlet of the water purifier is separately connected to the compressor, the direct-contact condenser, and the evaporator via the cold water pump. An outlet at the bottom of the evaporator is connected to the direct-contact condenser via the circulating water pump. The vacuum pump is connected above the direct-contact condenser, and the hot water pump is connected below the direct-contact condenser.

REFRIGERATION APPLIANCE HAVING PARALLEL EVAPORATORS AND OPERATING METHOD THEREFOR

A refrigeration appliance includes at least one warm storage compartment and one cold storage compartment and a refrigeration device having at least two mutually parallel evaporators connected in series with a compressor, a condenser, and a shut-off valve between the condenser and evaporators in a refrigerant circuit so that each evaporator cools one storage compartment. An operating method for the refrigeration appliance includes the steps a) deciding whether a need for cooling has newly occurred in the warm storage compartment, and, if so, b) operating the compressor while the shut-off valve is closed to cause refrigerant to back up in the condenser, c) opening the shut-off valve and supplying the evaporator of the warm storage compartment with the backed up refrigerant. In step b) the mass flow rate through the compressor is estimated and the time for performing step c) is determined by using the estimated mass flow rate. 113-. (canceled)14. A method for operating a refrigeration appliance , the method comprising:providing at least one warm storage compartment and at least one cold storage compartment;providing a refrigeration device having a refrigerant circuit including at least two mutually parallel evaporators connected in series with a compressor, a condenser, and a shut-off valve disposed between the condenser and the evaporators, permitting each evaporator to cool a respective one of the compartments;a) deciding whether a need for cooling has newly arisen in the warm storage compartment and, if so,b) operating the compressor while the shut-off valve is closed to cause refrigerant to back up in the condenser,c) opening the shut-off valve and supplying the evaporator of the warm storage compartment with the backed-up refrigerant, andin step b) estimating a mass flow rate through the compressor and determining a time for carrying out step c) by using the estimated mass flow rate.15. The method according to claim 14 , which further comprises carrying out step ...

Refrigerator and controlling method of the same

Disclosed are a refrigerator and a controlling method of the same. A change amount of a refrigerating chamber temperature, or a change amount of a freezing chamber temperature may be calculated per time period, and a load corresponding driving may be executed based on the calculated change amount. This may allow the load corresponding driving to be executed more precisely, reduce power consumption, and enhance stability and efficiency of a system.

Method and apparatus for controlling refrigerant flow

Method and apparatus for refrigerant flow control are disclosed. One exemplary method relates to a method of controlling a flow of a refrigerant in an appliance comprising a refrigerant flow controller and a refrigerant flow valve, wherein the refrigerant flow controller is configured to direct the refrigerant flow valve to one of a substantially fully opened position and a substantially fully closed position. The method comprises directing the refrigerant flow valve, via the refrigerant flow controller, to at least one transition position between the substantially fully opened position and the substantially fully closed position, and operating the appliance with the refrigerant flow valve at the at least one transition position.

Parameter control in transport refrigeration system and methods for same

Embodiments of transport refrigeration systems, apparatus, and/or methods for the same can provide exemplary verification for operating characteristics thereof. In one embodiment, a calculated compressor mid stage pressure can be verified using a prescribed relationship to other transport refrigeration system characteristics.

Cooling system for battery

A cooling system of a battery which efficiently cools a high voltage battery which is mounted in an electric vehicle or a hybrid vehicle so as to maintain battery performance by using a refrigeration cycle of an air-conditioning system, which is provided with an electric compressor, outside heat exchanger, inside heat exchanger, and a control device. A refrigerant path of the air-conditioning system for running refrigerant is provided with a branch path having a heat exchanger which bypasses the inside heat exchanger, a medium path connected to the heat exchanger runs another refrigerant for cooling the battery, control valves are provided which adjust the amounts of the refrigerant which flows to the refrigerant path and the branch path, and, when the control valves run the refrigerant to both the refrigerant path and the branch path, the control device increases the speed of the electric compressor.

Sequential dual evaporator refrigerator and method of controlling same

A refrigerator and method are provided where the refrigerator includes at least a refrigerator compartment (C 2 ) cooled by a refrigerator evaporator, a freezer compartment (C 1 ) cooled by a freezer evaporator, a compressor, a controller, and a valve that selectively couples the compressor to a selected one of the refrigerator evaporator and the freezer evaporator. The method includes determining both refrigerator and freezer compartment cooling priorities as a function of the respective actual refrigerator or freezer compartment temperatures, desired refrigerator or freezer compartment temperatures, and refrigerator or freezer hysteresis. The refrigerator and freezer compartment cooling priorities having one of the following priority levels: high, medium, low, and satisfied. The method further includes selecting a current refrigerator system mode in response to the refrigerator and freezer compartment cooling priorities.

Variable Refrigerant Flow Cooling System

A variable flow refrigerant system having a compressor and one or a plurality of evaporators. The suction at one or the plurality of evaporators for the input to the compressor is monitored and generally corresponds to the minimum pressure of the refrigerant. The pressure is associated with a temperature and is controlled to always be above the dew point temperature of the room. 1. A variable refrigerant flow cooling system comprising:a compressor having an inlet and an outlet, the inlet generating a first pressure, and the outlet generating a second pressure higher than the first pressure;a condenser having an inlet and an outlet, the inlet of the condenser communicating with the outlet of the compressor, the condenser receiving fluid provided by the outlet of the compressor and removing heat from the fluid;an expansion valve having an inlet and an outlet, the inlet of the expansion valve communicating with the outlet of the condenser, the expansion valve enabling expansion of the liquid at its outlet and varying a flow of liquid between its inlet and outlet;an evaporator having an inlet and an outlet, the inlet of the evaporator communicating with the outlet of the expansion valve, the evaporator absorbing heat into the fluid as the fluid passes from its inlet to outlet; anda controller monitoring a pressure at the outlet of the evaporator and varying the output of the compressor in accordance with the monitored pressure, wherein the monitored pressure indicates a saturation temperature and the control maintains the saturation temperature above a dew point temperature.2. The variable refrigerant flow system of wherein the expansion valve is responsive to the superheat of the evaporator.3. The variable refrigerant flow system of further comprising a suction line communicating with the outlet of the evaporator at a first end and the inlet of the compressor at a second end for fluid flow between the outlet of the evaporator and the inlet of the compressor.4. The ...

Mass flow multiplier refrigeration cycle

The ejector mass flow multiplier refrigeration cycle utilizes a single-phase ejector which is operated at a high entrainment ratio and performs the function as a mass flow multiplier. The high-pressure motive force input into the single-phase ejector is provided by a vapor compressor which sucks a portion of the output mass flow from an evaporator with the remaining mass flow output from the evaporator being sucked into low-pressure port of the same single-phase ejector. The low-pressure output of the single-phase ejector is inputted into the low-pressure port of a two-phase ejector where the mass flow pressure is increased for the temperature conditions of a condenser. A high-pressure liquid pump provides the motive force input of the two-phase ejector and for the input to an evaporator where the cooling effect of the system takes place.

EXPANSION UNIT FOR A VAPOUR COMPRESSION SYSTEM

An expansion device unit () for a vapour compression system (), and a vapour compression system () are disclosed. The expansion device unit () comprises an inlet opening () arranged to receive fluid medium, at least two outlet openings () arranged to deliver fluid medium, a main expanding section () adapted to expand fluid medium received via the inlet opening () before delivering the fluid medium to the outlet openings (), and a distribution section () arranged to split the fluid flow received via the inlet opening () into at least two fluid flows to be delivered via the outlet openings (). The main expanding section () and/or the distribution section () is/are arranged to cause pressures in fluid delivered via at least two of the outlet openings () to be distinct. The main expanding section () is operated on the basis of one or more parameters measured in the fluid flow delivered by one of the outlet openings (). The distinct pressure levels allow distinct evaporating temperature in evaporator paths (555) connected to the outlet openings (). Thereby a large temperature difference between inlet temperature and outlet temperature of a secondary fluid flow across the evaporator () can be obtained, without requiring that the entire mass flow must be compressed from a low pressure level by the compressor (). Thereby energy is conserved. 2. The expansion device unit according to claim 1 , wherein the main expanding section is fluidly connected between the inlet opening and the distribution section.3. The expansion device unit according to claim 2 , wherein the distribution section comprises a number of parallel flow paths claim 2 , each flow path being fluidly connected to an outlet opening claim 2 , and wherein at least one of the flow paths has a flow restrictor arranged therein.4. The expansion device unit according to claim 1 , wherein the distribution section is fluidly connected between the inlet opening and the main expanding section.5. The expansion device unit ...

Pumped Refrigerant Cooling System With 1+1 To N+1 And Built-In Redundancy

A pumped refrigerant cooling system having cooling units with associated pumping units for providing working fluid to the cooling unit to enable cooling of a space. The pumped refrigerant cooling system also includes a redundant pumping unit which is activated when a primary pumping unit associated with a cooling unit becomes inactive. The primary pumping unit is deactivated in favor of the redundant pumping unit. Once the primary pumping unit is placed in a condition suitable for reactivation, the redundant pumping unit is deactivated, and the primary pumping unit is reactivated.

HEAT SOURCE DEVICE

A heat source device is provided with a differential pressure sensor that measures the differential pressure between an inlet pressure and an outlet pressure for the chilled water in an evaporator and with a control device. The control device possesses the coefficient of loss for the evaporator and is provided with a chilled-water flow-rate computing portion that calculates a chilled-water flow rate at the evaporator on the basis of the coefficient of loss and the differential pressure output from the differential pressure sensor; a control-command computing portion that generates a control command by using a specification heating-medium flow rate that is set in advance; and a control-command correcting portion that corrects the control command generated by the control-command computing portion. 1. A heat source device comprising:a first heat exchanger that cools or heats a heating medium that flows in from an external load;a second heat exchanger that performs heat exchange with external air or cooling water;a refrigerant circulating channel that circulates refrigerant between the first heat exchanger and the second heat exchanger;a centrifugal compressor provided in the refrigerant circulating channel;a differential-pressure measuring unit that measures a differential pressure between an inlet pressure and an outlet pressure of the heating medium in the first heat exchanger; anda controlling unit,wherein the controlling unit includesa flow-rate computing unit that calculates a flow rate of the heating medium in the first heat exchanger on the basis of the coefficient of loss for the first heat exchanger and the differential pressure output from the differential-pressure measuring unit;a control-command computing unit that generates a control command by using a specification heating-medium flow rate that is set in advance; anda control-command correcting unit that corrects the control command generated by the control-command computing unit on the basis of the ...

Energy efficiency of air conditioning system by using dual suction compressor

A method for selectively transferring latent and sensible heat from air in a cooling system of a building structure interior volume that includes at least the steps of: (1) providing a building structure air conditioning system that provides cooling to at least a portion of the interior volume of a building structure and (2) adjusting a ratio of a time coolant flows through the first evaporator to a time coolant flows through the second evaporator such that coolant flows through the first evaporator for more time than the second evaporator when more latent heat is removed from the air and more coolant flows through the second evaporator for more time than the first evaporator when more sensible heat is removed from the air.

Retrofittable thermal storage for air conditioning systems

A system and method to retrofit a building structure having a forced air cooling system with a thermal storage system. The method typically includes the steps of installing a coolant loop that is free of a compressor, and a condenser, where the coolant loop comprises a refrigerant fluid pump and refrigerant fluid conduits that deliver coolant loop refrigerant fluid to a coolant loop evaporator spaced within a building air cooling passageway that delivers air to at least a portion of the interior volume of the a building structure and in thermal communication with air passing through the passageway and where the coolant loop is in thermal communication with a thermal energy storage material within a thermal energy thermal storage fluid tank; and activating the coolant loop pump to provide cooling to the coolant loop evaporator thereby cooling air moving in the building air passageway of a building structure.

Fin-coil design for a dual suction air conditioning unit

An evaporator system that includes: a first evaporator coil at a first evaporator temperature and pressure; a second evaporator coil at a second evaporator temperature and pressure that is less than the first evaporator temperature and pressure where the first evaporator and second evaporator are configured to be thermally disjointed; and a plurality of thermally conductive spaced apart evaporator fins having a plurality of spaced apart thermal break portions positioned between the first evaporator coil and the second evaporator coil that thermally disjoin the first evaporator and the second evaporator.

Cooling system control and servicing based on time-based variation of an operational variable

Automated control of a cooling system cooling at least one electronic component is provided. The control includes monitoring over a period of time variation of an operational variable of the cooling system or of the at least one electronic component, and based, at least in part, on variation of the operational variable over the period of time, automatically determining whether to adjust control of the cooling system to limit variation of the operational variable. In one implementation, depending on the variation of the operational variable, and whether control of the cooling system has been previously adjusted, the method may further include automatically determining a probability of fail or an expected residual life of the cooling system, and responsive to the predicted probability of fail exceeding a first acceptable threshold or the expected residual life being below a second acceptable threshold, automatically scheduling for a cooling system repair or replacement.

Cooling system control and servicing based on time-based variation of an operational variable

Automated control of a cooling system cooling at least one electronic component is provided. The control includes monitoring over a period of time variation of an operational variable of the cooling system or of the at least one electronic component, and based, at least in part, on variation of the operational variable over the period of time, automatically determining whether to adjust control of the cooling system to limit variation of the operational variable. In one implementation, depending on the variation of the operational variable, and whether control of the cooling system has been previously adjusted, the method may further include automatically determining a probability of fail or an expected residual life of the cooling system, and responsive to the predicted probability of fail exceeding a first acceptable threshold or the expected residual life being below a second acceptable threshold, automatically scheduling for a cooling system repair or replacement.

BATTERY COOLANT CIRCUIT CONTROL

A vehicle includes a refrigerant system having a chiller and a coolant system having a chiller loop and a radiator loop. The chiller loop is arranged to circulate coolant through the chiller, and the radiator loop is arranged to circulate coolant through a battery, a radiator, and a bypass valve connected to a bypass conduit. A controller is configured to, in response to an ambient-air temperature exceeding a battery-coolant temperature, actuate the valve to circulate coolant to the bypass conduit to skip the radiator. 1. A thermal-management system for a traction battery of a hybrid vehicle , the thermal-management system comprising:a refrigerant subsystem including a compressor, a condenser, a battery chiller, and an evaporator; a proportioning valve having first and second outlets, and an inlet connected in fluid communication with an outlet side of the traction battery via an outlet conduit,', 'a temperature sensor disposed on the outlet conduit and configured to output a signal indicative of a coolant temperature,', 'a chiller loop connected in fluid communication with the first outlet and arranged to convey coolant through the chiller to transfer heat from the coolant subsystem to the refrigerant subsystem, and', 'a radiator loop connected in fluid communication with the second outlet and arranged to convey coolant through the radiator to transfer heat from the coolant subsystem to outside air, the radiator loop having a bypass valve configured to route coolant around the radiator via a bypass line when the valve is actuated to a bypass position and configured to route coolant to the radiator when the valve is actuated to a radiator position; and, 'a coolant subsystem including'}a controller configured to, in response to the proportioning valve directing at least a portion of the coolant to the second outlet and the outside air temperature exceeding the coolant temperature, actuate the bypass valve to the bypass position.2. The thermal-management system of ...

Synchronous temperature rate control for refrigeration with reduced energy consumption

Methods of operation for refrigerator appliance configurations with a controller, a condenser, at least one evaporator, a compressor, and two refrigeration compartments. The configuration may be equipped with a variable-speed or variable-capacity compressor, variable speed evaporator or compartment fans, a damper, and/or a dual-temperature evaporator with a valve system to control flow of refrigerant through one or more pressure reduction devices. The methods may include synchronizing alternating cycles of cooling each compartment to a temperature approximately equal to the compartment set point temperature by operation of the compressor, fans, damper and/or valve system. The methods may also include controlling the cooling rate in one or both compartments. Refrigeration compartment cooling may begin at an interval before or after when the freezer compartment reaches its lower threshold temperature. Freezer compartment cooling may begin at an interval before or after when the freezer compartment reaches its upper threshold temperature.

DEVICE FOR REGULATING A FLOW-THROUGH AND DISTRIBUTING A FLUID IN A FLUID CIRCUIT

Device for regulating and controlling a flow-through and distributing a fluid in a fluid circuit has a housing with ports connecting fluid lines that are connected across a passage aperture with an interior volume of the housing, a valve element disposed in the interior volume of the housing, a drive element for moving the valve element relative to the housing. 11618192021. A device for regulating and controlling a flow-through , and distributing a fluid in a fluid circuit , comprising a housing with ports for connecting with fluid lines that are in each instance connected across a passage aperture with an interior volume of the housing as well as a valve element disposed in the interior volume of the housing with a drive element () for moving the valve element relative to the housing wherein the valve element is supported rotatably about an axis of rotation and comprises openings ( , , , ) , developed as through-holes , that form in the interior of the valve element a common volume , whereinan axis of symmetry of at least one through-hole of a first opening and the axis of rotation of the valve element as well as an axis of symmetry of a passage aperture of a first port of the housing are disposed in a direction z, andaxes of symmetry of through-holes of at least three openings of the valve element and of passage apertures of two ports of the housing are disposed in a plane spanned by two directions x, y,wherein the directions x, y, z are each oriented perpendicularly to one another.2. A device as in claim 1 , wherein the axes of symmetry of the passage apertures of the ports of the housing and the axis of rotation of the valve element have a common point of intersection in which the valve element is disposed with its center point.316. A device as in claim 1 , wherein the first port of the housing is disposed on a side of the drive element () opposite to the valve element and that a second port and a third port are developed on sides of the housing opposite to one ...

Climate-Control System Having Vapor-Injection Compressors

A climate-control system includes a first compressor and a second compressor. The first compressor includes a first inlet and a first outlet. The second compressor is in fluid communication with the first compressor and includes second and third inlets, a second compression mechanism and a second outlet. The second and third inlets are fluidly coupled to the second compression mechanism. The second compression mechanism receives working fluid from the first compressor through the third inlet and discharges working fluid through the second outlet of the second compressor. 1. A climate-control system comprising:a first compressor having a first inlet and a first outlet;a second compressor in fluid communication with the first compressor and having second and third inlets, a second compression mechanism and a second outlet, the second and third inlets fluidly coupled to the second compression mechanism, the second compression mechanism receiving working fluid from the first compressor through the third inlet and discharging working fluid through the second outlet of the second compressor.2. The climate-control system of claim 1 , wherein a first heat exchanger is in fluid communication with the second compressor and receives working fluid from the second compressor.3. The climate-control system of claim 2 , wherein a second heat exchanger is in fluid communication with the first heat exchanger and includes a fourth inlet and third and fourth outlets claim 2 , the fourth inlet receives working fluid from the first heat exchanger claim 2 , the third outlet provides working fluid to the first inlet.4. The climate-control system of claim 3 , wherein a first expansion device is disposed between the first heat exchanger and the second heat exchanger.5. The climate-control system of claim 4 , wherein the fourth outlet of the second heat exchanger provides working fluid to the second inlet of the second compressor.6. The climate-control system of claim 5 , further comprising a ...

Vehicle Having a Refrigerant Circuit

A vehicle has a drive motor and a refrigerant circuit. The refrigerant circuit includes, when viewed in the direction of flow of the refrigerant, a compressor, a gas cooler or condenser, an expansion device and an evaporator. The refrigerant circuit has a first shut-off element which is arranged outside of an area arranged between the drive motor and the evaporator.

Closed Loop Capacity And Power Management Scheme For Multi Stage Transport Refrigeration System

A unit, such as a transport refrigeration unit 12, may include a plurality of components arranged in multiple stages. At least a portion of the components 18,20 may be arranged in a serial or parallel manner. A position associated with the plurality of components may be selected to control a load on a power source, such as an engine 30. For example, a position for each of the components may be selected so as to maximize a delivery of available power from the power source to the unit. In some embodiments, one or more controllers 32,34 may measure a parameter associated with the power source and select a position for one or more of the components. In some embodiments, an economized refrigeration cycle may be used. Capacity may be staged from a single stage compression cycle or mode to a multistage compression cycle or mode, with a corresponding increase in capacity via subcooling.

COOLING SYSTEM

A system includes a flash tank, a first load, a second load, a first compressor, a second compressor, a first valve, and a second valve. The flash tank stores a refrigerant. The first and second loads use the refrigerant to cool first and second spaces. The first compressor compresses the refrigerant from the first load during a first mode of operation and a flash gas from the flash tank during a second mode of operation. The second compressor compresses a mixture of the refrigerant from the first and second loads during the first mode of operation. The first valve directs the flash gas from the flash tank to the first compressor during the second mode of operation. The second valve directs the compressed flash gas from the first compressor to the first load during the second mode of operation to defrost the first load. 1. A system comprising:a flash tank configured to store a refrigerant;a first load configured to use the refrigerant from the flash tank to cool a first space proximate the first load;a second load configured to use the refrigerant from the flash tank to cool a second space proximate the second load during a first mode of operation and a second mode of operation; compress the refrigerant from the first load during the first mode of operation; and', 'compress a flash gas from the flash tank during the second mode of operation;, 'a first compressor configured toa second compressor configured to compress a mixture of the refrigerant from the first compressor and the refrigerant from the second load during the first mode of operation; close during the first mode of operation; and', 'direct the flash gas from the flash tank to the first compressor during the second mode of operation; and, 'a first valve configured to close during the first mode of operation; and', 'direct the compressed flash gas from the first compressor to the first load during the second mode of operation to defrost the first load., 'a second valve configured to2. The system of claim 1 ...

Refrigeration System Including Evaporators Associated in Parallel

The present invention belongs to the technological field of refrigeration systems and, more particularly refrigeration systems used in residential applications, for example, refrigeration appliances including at least two climate chambers at different temperatures. Problem to be solved: Conventionally, existing Refrigeration systems including evaporators connected in parallel require complex compressors including at least two suction paths, or alternatively functional complex arrangements unable to maintain independence between the individual evaporators. Troubleshooting: Disclosed is a refrigeration system including evaporators connected in parallel where each of said evaporators operates through a separate feeding principle, and that this aspect makes it possible, with the aid of a liquid accumulator and phase separator, maintaining the independence between the individual evaporators, besides the use of a compressor. 1. Refrigeration system including at least two evaporators associated in parallel , where:said evaporators connected in parallel operate in different pressure and temperature ranges;said refrigeration system comprising at least two evaporators connected in parallel further comprising:at least one compressor, at least a condenser, at least a switching device at least a first expansion device, at least a second expansion device, and at least one fluid accumulator;the outflow of the compressor being fluidly connected to the inlet path from the condenser; the condenser outflow being fluidly connected to the switching device inlet path; the switching device outflow being fluidly connected to the first expansion device;the switching device outflow is fluidly connected to the second expansion device;said liquid accumulator comprising at least one lower inlet path immersed in the liquid, at least one upper inlet path, and at least one upper outflow;said refrigeration system comprising at least two evaporators connected in parallel being particularly ...

Pumped Refrigerant Cooling System With 1+1 To N+1 And Built-In Redundancy

A pumped refrigerant cooling system having cooling units with associated pumping units for providing working fluid to the cooling unit to enable cooling of a space. The pumped refrigerant cooling system also includes a redundant pumping unit which is activated when a primary pumping unit associated with a cooling unit becomes inactive. The primary pumping unit is deactivated in favor of the redundant pumping unit. Once the primary pumping unit is placed in a condition suitable for reactivation, the redundant pumping unit is deactivated, and the primary pumping unit is reactivated.

Split air conditioning system with a single outdoor unit

A split air conditioning system for conditioning a plurality of zones within a single living area of a building, that includes a single outdoor unit; a refrigerant flow pathway made up of a plurality of refrigerant conduits having a common refrigerant flow path portion and at least two divergent flow path portions, a first divergent flow path and a second divergent flow path and the first evaporator and second evaporator are in parallel with one another; at least one throttling device; a portioning device configured to selectively and proportionately regulate the flow of a refrigerant fluid to the first evaporator and the second evaporator, respectively where the compressor is configured to be capable of simultaneously driving both the first evaporator and the second evaporator at their full cooling capacity.

AIR CONDITIONING SYSTEMS FOR AT LEAST TWO ROOMS USING A SINGLE OUTDOOR UNIT

A high-efficiency air conditioning system for conditioning a plurality of rooms within an interior of a building, the air conditioning system including: two separate rooms within a building, a single outdoor unit a refrigerant flow pathway that includes a plurality of refrigerant conduits having a common refrigerant flow path portion and at least two divergent flow path portions, a first divergent flow path where the first evaporator and second evaporator are in parallel with one another; at least one throttling device and at least a first indoor air handling unit positioned within and providing cooling to the first room and a second indoor air handling unit positioned within and providing cooling to a second room. The compressor is incapable of simultaneously supplying both the first evaporator and the second evaporator at their full cooling capacity. 1. A high-efficiency air conditioning system for conditioning a plurality of rooms within an interior of a building , the air conditioning system comprising:two separate rooms within a building;a single outdoor unit comprising:a compressor;a condenser; anda condenser fan associated with the condenser that moves air to cool the condenser;a refrigerant flow pathway comprised of a plurality of refrigerant conduits having a common refrigerant flow path portion and at least two divergent flow path portions, a first divergent flow path that delivers refrigerant to a first evaporator configured to operate at a first evaporator pressure and a second divergent flow path that delivers refrigerant to a second evaporator such that the first evaporator and second evaporator are in parallel with one another;at least one throttling device wherein a single throttling device is positioned along a common flow path when a single throttling device is used and a first throttling device is positioned along the first divergent flow path and a second throttling device is positioned along the second divergent flow path when two or more ...

EVAPORATOR CONTROL

An evaporator controller for a plural-coil evaporator of a refrigeration system, the evaporator controller comprising a mode determiner for selecting a mode of operation of the evaporator from a plurality of modes of operation, wherein one mode uses a first coil of the plurality of coils of the evaporator, another mode uses a second coil of the plurality of coils of the evaporator and at least one mode uses more than one of the plurality of coils, based on selection data and a refrigeration requirement, and a selection data updater for updating the selection data based on the selected mode of operation and a process variable of the refrigeration system. 140-. (canceled)41. An evaporator controller for a plural-coil evaporator of a refrigeration system , the evaporator controller comprising:a mode determiner for selecting a mode of operation of the evaporator from a plurality of modes of operation, wherein one mode uses a first coil of the plurality of coils of the evaporator, another mode uses a second coil of the plurality of coils of the evaporator and at least one mode uses more than one of the plurality of coils, based on selection data and a refrigeration requirement; anda selection data updater for updating the selection data based on the selected mode of operation and a process variable of the refrigeration system.42. The evaporator controller of claim 41 , wherein the selection data comprises boundary data relating operational limits of each of the plurality of modes of operation to the operational limits of the evaporator.43. The evaporator controller of claim 41 , wherein the mode determiner has selection logic defining at least one mode-selection rule for selecting the mode of operation.44. The evaporator controller of claim 41 , further comprising a PID loop controller for determining the refrigeration requirement by calculating an evaporator demand value based on an evaporator supply temperature and a set-point temperature.45. The evaporator controller ...

REFRIGERATION CYCLE SYSTEM

A refrigeration cycle system includes: a first refrigeration cycle apparatus which is connected to a first compressor, a first condenser, a first pressure reduction device, and a first evaporator and through which the refrigerant circulates; a second refrigeration cycle apparatus which is connected to a second compressor, a second condenser, and a second pressure reduction device, and a second evaporator; a first bypass passage connecting a portion between the first evaporator and the first compressor to a portion between the second evaporator and the second compressor; and a second bypass passage connecting a portion between the first condenser and the first pressure reduction device to a portion between the second condenser and the second pressure reduction device. 1. A refrigeration cycle system comprising:a first refrigeration cycle apparatus that is connected to a first compressor, a first condenser, a first pressure reduction device, and a first evaporator, and through which refrigerant circulates;a second refrigeration cycle apparatus that is connected to a second compressor, a second condenser, a second pressure reduction device, and a second evaporator, and through which the refrigerant circulates;a first bypass passage connecting a portion between the first evaporator and the first compressor to a portion between the second evaporator and the second compressor; anda second bypass passage connecting a portion between the first condenser and the first pressure reduction device to a portion between the second condenser and the second pressure reduction device, whereinthe first refrigeration cycle apparatus further includes a third valve disposed between the first evaporator and the first compressor and configured to control a passage of the refrigerant,the second refrigeration cycle apparatus further includes a fourth valve disposed between the second evaporator and the second compressor and configured to control a passage of the refrigerant, andthe first ...

Air conditioner system

An air conditioning system including a four-way valve including a first port, a second port, a third port and a fourth port, at least the first port and the third port are fluidly isolated; a compressor, an output end and an input end of which are in communication with the first port and the third port respectively; a first evaporator, a first end of which is in communication with the third port; a second evaporator and a condenser, first ends of which are in communication with one of the second port and the fourth port respectively; wherein a second end of the condenser, a second end of the first evaporator, and a second end of the second evaporator are in communication at a first node, and a first throttling valve, a second throttling valve and a third throttling valve are respectively disposed between the condenser and the first node.

REFRIGERATION DEVICE COMPRISING MULTIPLE STORAGE CHAMBERS

A refrigeration device has a first storage chamber, a second storage chamber and a refrigerant circuit, in which a first controllable throttle point, a first heat exchanger for controlling the temperature of the first storage chamber, a second controllable throttle point and a second heat exchanger for cooling the second storage chamber are connected in series between a pressure connection and a suction connection. A hot line section, located upstream of the second heat exchanger, and a cold line section, located downstream of the second heat exchanger, are routed in thermal contact with respect to one another in order to form an internal heat exchanger. The first heat exchanger is connected to the pressure connection bypassing the hot line section. 112-. (canceled)13. A refrigeration device , comprising:a first storage chamber and a second storage chamber;a refrigerant circuit having a first controllable throttle point, a first heat exchanger for controlling a temperature of said first storage chamber, a second controllable throttle point and a second heat exchanger for cooling said second storage chamber connected in series between a pressure connection and a suction connection;a hot line section disposed upstream of said second heat exchanger and a cold line section disposed downstream of said second heat exchanger;said hot line section and said cold line section being routed in thermal contact with one another to form an inner heat exchanger; andsaid first heat exchanger being connected to the pressure connection and bypassing said hot line section.14. The refrigeration device according to claim 13 , further comprising a bypass line branch containing a third controllable throttle point and a third heat exchanger connected upstream of said second heat exchanger and connected in parallel with a line branch containing said first controllable throttle point and said first heat exchanger.15. The refrigeration device according to claim 13 , wherein said hot line ...

VALVE FOR CONTROLLING A FLUID FLOW

The invention relates to a valve (), in particular an expansion valve, for controlling fluid flow, having a valve central housing () having a first and a second opening () and a valve element () which has a rotationally symmetrical outline and is arranged rotatably within the valve element housing (). According to the invention, the valve element () has a cut-out, wherein the cut-out () has a variable dimension, and a sub region () of the cutout () is formed continuously through the valve element (). 111121214142020101020203030303030303232303030302020aaaaaaabcaaabca. A valve ( , ) for controlling a fluid stream , the valve having a valve means housing , with a first opening ( , ) and a second opening ( , ) , and having a valve means ( , ) which has a rotationally symmetrical basic shape and is arranged rotatably within the valve means housing ( , ) , characterized in that the valve means ( , ) has at least one recess ( , , , ) , the recess ( , ) having a varying dimension , and a part region ( , ) of the recess ( , , , ) being of continuous configuration through the valve means ( , ).2112020aa. The valve ( claim 1 , ) as claimed in claim 1 , characterized in that the valve means ( claim 1 , ) is of pot-shaped or disk-shaped configuration.311202224262612223030301220143030302014aabab. The valve ( claim 2 , ) as claimed in claim 2 , characterized in that the valve means () of pot-shaped configuration has a valve means shell () claim 2 , a valve means bottom () and a valve means edge () claim 2 , the valve means edge () pointing in a direction of the first opening () claim 2 , the valve means shell () having at least one of the at least one recess ( claim 2 , claim 2 , ) claim 2 , such that a fluid stream through the first opening () claim 2 , an inner region of the valve means () and the second opening () can be regulated in a manner which is dependent on a position of the recess ( claim 2 , claim 2 , ) of the valve means () in relation to the second opening (). ...

REFRIGERANT-AMOUNT DETERMINING METHOD AND REFRIGERANT-AMOUNT DETERMINING DEVICE

In a refrigeration apparatus including a refrigerant circuit in which a refrigerant in a gas-liquid two-phase state flows through a liquid-side connection pipe, a refrigerant-amount determining method and a refrigerant-amount determining device capable of grasping an appropriate refrigerant charging amount corresponding to the length of the connection pipe is provided. Provided is a refrigerant-amount determining method for a refrigerant to be charged to a refrigeration apparatus including a refrigerant circuit in which a compressor, an outdoor heat exchanger that functions as a condenser, an outdoor expansion valve, indoor heat exchangers that function as evaporators, a liquid-side connection pipe that feeds the refrigerant, which has passed through the outdoor heat exchanger and then has been decompressed by the outdoor expansion valve, to each of the indoor heat exchangers, and a gas-side connection pipe that feeds the refrigerant, which has passed through each of the indoor heat exchangers, to a suction side of the compressor, are connected to one another. The method determines a refrigerant amount of the refrigerant to be charged to the refrigerant circuit such that a refrigerant amount per unit length of the liquid-side connection pipe increases as a length of the liquid-side connection pipe is larger. 1. A refrigerant-amount determining method for a refrigerant to be charged to a refrigeration apparatus including a refrigerant circuit in which a compressor , a condenser , a first expansion valve , an evaporator , a liquid-side connection pipe that feeds the refrigerant , which has passed through the condenser and then has been decompressed by the first expansion valve , to the evaporator , and a gas-side connection pipe that feeds the refrigerant , which has passed through the evaporator , to a suction side of the compressor , are connected to one another , the method comprising:determining a refrigerant amount of the refrigerant to be charged to the ...

EVAPORATOR HAVING INTEGRATED PULSE WAVE ATOMIZER EXPANSION DEVICE

An evaporator for use in a refrigeration system includes one or more Coanda evaporation chambers having an integrated, internal expansion device. The internal expansion device is a linear atomization tube having a plurality of ejection holes arranged in a series of spiral rows. Liquid refrigerant introduced into the linear atomization to is ejected onto the inner wall of the Coanda evaporation chamber, covering it completely with a thin layer of liquid refrigerant. Liquid refrigerant is fed to the linear atomization device in a series of rapid pulses. 1. An evaporator for a refrigeration system having an integrated expansion device comprising:at least one elongate evaporator chamber having a convex cross section and extending between an inlet manifold at a proximal end and an outlet manifold at a distal end;a linear atomizer comprising a tube having a plurality of substantially evenly spaced holes extending through the a center of the at least one elongate evaporator chamber;a pulse injector feeding liquid refrigerant to the evaporator chamber in a series of rapid pulses;wherein the convex cross section of the elongate evaporator chamber induces a Coanda effect on air blown across the elongate evaporation chamber by a fan.2. The evaporator for a refrigeration system having an integrated expansion device of wherein the linear atomizer has a progressively smaller diameter as it travels from the proximal end to the distal end of the at least one elongate evaporator chamber.3. The evaporator for a refrigeration system having an integrated expansion device of further comprising a plurality of fins on the exterior of the at least one elongate evaporator chamber perpendicular to a length of the at least one elongate evaporator chamber defined by the proximal end and the distal end of the elongate evaporator chamber.4. The evaporator for a refrigeration system having an integrated expansion device of wherein the distal end of the elongate evaporator chamber includes a ...

REFRIGERATOR AND CONTROL METHOD THEREOF

Provided are a refrigerator and a control method thereof. The refrigerator includes a compressor, a condenser, a refrigerant tube guiding a flow of the refrigerant condensed in the condenser, a plurality of expansion devices, a plurality of evaporators including first and second evaporators to evaporate the refrigerant decompressed in the plurality of expansion devices, a plurality of first evaporation passages in which a portion of the plurality of expansion devices is disposed, the plurality of first evaporation passages guiding introduction of the refrigerant into the first evaporator of the plurality of evaporators, a second evaporation passage in which the other portion of the plurality of expansion devices is disposed, the second evaporation passage guiding introduction of the refrigerant into the second evaporator and a flow adjusting unit to branch the refrigerant into the plurality of first evaporation passages and the second evaporation passage. 1. A refrigerator comprising:a compressor configured to compress a refrigerant;a condenser configured to condense the refrigerant compressed in the compressor;a refrigerant tube that guides a flow of the refrigerant condensed in the condenser;a plurality of expansion devices configured to decompress the refrigerant condensed in the condenser;a plurality of evaporators including a first evaporator and a second evaporator to evaporate the refrigerant decompressed in the plurality of expansion devices;a plurality of first evaporation passages in which at least one of the plurality of expansion devices is disposed, the plurality of first evaporation passages to guide the refrigerant into the first evaporator among the plurality of evaporators;a second evaporation passage in which remaining ones of the plurality of expansion devices is disposed, the second evaporation passage to guide the refrigerant into the second evaporator among the plurality of evaporators; anda flow adjusting device disposed in the refrigerant ...

AIR CONDITIONER

An air conditioner includes an indoor unit disposed at an indoor space; and an outdoor unit disposed at an outdoor space and connected to the indoor unit through refrigerant pipes, wherein the indoor unit includes an indoor unit body forming an external appearance of the indoor unit and provided with a plurality of indoor outlets; and a plurality of indoor heat-exchanging units disposed inside the indoor unit body such that the plurality of indoor heat-exchanging units corresponds to the plurality of indoor outlets, respectively. 1. An air conditioner , comprising:an indoor unit; andan outdoor unit connected to the indoor unit through refrigerant pipes, an indoor unit body forming an external appearance of the indoor unit and provided with a plurality of indoor outlets; and', 'a plurality of indoor heat-exchanging units disposed inside the indoor unit body such that the plurality of indoor heat-exchanging units corresponds to the plurality of indoor outlets, respectively., 'wherein the indoor unit comprises'}2. The air conditioner of claim 1 , wherein:the indoor unit further comprises a plurality of indoor fans corresponding to the plurality of indoor outlets, respectively.3. The air conditioner of claim 1 , wherein:the indoor unit further comprises a plurality of expansion valves to decompress and expand a refrigerant prior to being introduced into the plurality of indoor heat-exchanging units.4. The air conditioner of claim 3 , wherein:the outdoor unit further comprises a compressor to compress the refrigerant, and an outdoor heat-exchanging unit to exchange heat with outdoor air.5. The air conditioner of claim 4 , wherein:the outdoor unit further comprises a four-way valve to guide the refrigerant discharged from the compressor to one of the plurality of indoor heat-exchanging units and the outdoor heat-exchanging unit, and an outdoor expansion valve to decompress and expand refrigerant prior to being introduced into the outdoor heat-exchanging unit.6. The air ...

EJECTOR REFRIGERATION CYCLE

In an ejector refrigeration cycle, an inlet of a nozzle portion of an ejector is connected to a refrigerant outlet side of a high-stage side evaporator, a refrigerant suction port of the ejector is connected to a refrigerant outlet side of a low-stage side evaporator, and an internal heat exchanger is provided for exchanging heat between a high-pressure refrigerant flowing into a low-stage side throttle device for decompressing the refrigerant flowing into the low-stage side evaporator, and a low-stage side low-pressure refrigerant flowing out of the low-stage side evaporator. Because a difference in enthalpy between the inlet and outlet of the low-stage side evaporator can be enlarged, the cooling capacities exhibited by the respective evaporators can be adjusted to be closer to each other even if the flow-rate ratio Ge/Gn of the suction refrigerant flow rate Ge to the injection refrigerant flow rate Gn is set to a relatively small value so as to make it possible to improve the COP of the cycle. 1. An ejector refrigeration cycle comprising:a compressor that compresses and discharges a refrigerant;a radiator that dissipates heat from the refrigerant discharged from the compressor;a branch portion that branches a flow of the refrigerant flowing out of the radiator;a first decompression device and a second decompression device that decompress the refrigerant flowing out of the radiator, wherein one refrigerant outflow port of the branch portion is connected to an inlet side of the first decompression device, and the other refrigerant outflow port of the branch portion is connected to an inlet side of the second decompression device;a first evaporator that evaporates the refrigerant decompressed by the first decompression device to cool air;a second evaporator that evaporates the refrigerant decompressed by the second decompression device to cool air;an ejector that draws the refrigerant on a downstream side of the second evaporator from a refrigerant suction port by a ...

METHODS FOR CONTROLLING A COMPRESSOR WITH DOUBLE SUCTION FOR REFRIGERATION SYSTEMS

The present invention refers to methods for controlling a double suction compressor for application in refrigeration systems, capable of meeting the different demands for cost, efficiency and control of temperatures by means of techniques of complexity levels and different configurations of the elements from the control loop (temperature sensors, actuators, controllers, etc.). The proposed solutions include the description of a method for controlling and adjusting the refrigeration capacities of a refrigeration system equipped with a double suction compressor, the refrigeration system comprising compartments to be refrigerated and comprising at least two evaporators () positioned in the compartments to be refrigerated (), the double suction compressor () being controllable to alternate its compression capacity, the method comprising steps of (i) Continuously measuring at least a temperature coming from a temperature sensor (SET,SCT) associated with at least one of the evaporators () and (ii) acting in the compressor's () compression capacity, from the measurement of step (i). 120607010. Method for controlling and adjusting the refrigeration capacities of a refrigeration system equipped with a double suction compressor , the system comprising compartments to be refrigerated and comprising at least two evaporators () positioned in the compartments to be refrigerated ( ,) , the double suction compressor () being controllable to alternate its compression capacity , the method comprising the steps of:{'b': '20', '(i) continuously measuring at least a temperature from a temperature sensor (SET,SCT) associated with at least one of the evaporators ();'}{'b': 10', '10, 'sub': 'COMP', "(ii) acting in the compression capacity of the compressor (), based on measurement of step (i), the acting in the compressor's capacity (CAP) of the compressor () being performed thorough the intermittent connection and disconnection of its operation,"}{'b': '10', "the method being ...

Thermal management system controlling dynamic and steady state thermal loads

A cooling system includes a heat exchanger through which a refrigerant flows, the heat exchanger having a fluid passing therethrough such that heat is rejected to the fluid, an evaporator, a refrigerant piping split point that receives the refrigerant at a given pressure from the heat exchanger and splits the refrigerant flow into a first circuit and a second circuit, the first circuit having an expansion valve that receives the refrigerant at the given pressure, and the second circuit having a first turbine coupled to a first compressor, wherein the first turbine receives the refrigerant at the given pressure, and a set of valves arranged to direct the refrigerant through the first circuit, the second circuit, or both the first and second circuits based on ambient conditions of the cooling system.

Micro Booster Supermarket Refrigeration Architecture

A refrigeration system includes first and second compressors, a condenser, first and second evaporators, and a valve. The first compressor is fluidly connected to first suction and discharge lines. The second compressor is fluidly connected to second suction and discharge lines. The second suction line is fluidly connected to the first discharge line. The condenser receives refrigerant from the second compressor. The first evaporator receives refrigerant from the condenser and discharges refrigerant to the first suction line. The second evaporator receives refrigerant from the condenser and discharges refrigerant to the second suction line. The valve is disposed between the first evaporator and the first suction line. The first suction line receives refrigerant when the valve is in a first position. The second suction line receives refrigerant when the valve is in a second position. The first compressor is bypassed when the valve is in the second position. 1. A refrigeration system comprising: at least one first compressor fluidly connected to a first suction line and a first discharge line;', 'at least one second compressor fluidly connected to a second suction line and a second discharge line, the second suction line being fluidly connected to the first discharge line;', 'a condenser operable to receive a first refrigerant from the at least one second compressor;', 'a first evaporator operable to receive the first refrigerant from the condenser and discharge the first refrigerant to the first suction line;', 'a second evaporator operable to receive the first refrigerant from the condenser and discharge the first refrigerant to the second suction line;', 'a heat exchanger operable to receive the first refrigerant from the condenser and discharge the first refrigerant to the second suction line; and', the first suction line receives the first refrigerant from the first evaporator when the bypass valve is in a first position;', 'second suction line receives the first ...

Operating-phase-dependently controllable aircraft air conditioning system and method for operating such an aircraft air conditioning system

An aircraft air conditioning system comprises an ambient air line which is configured have ambient air flow therethrough and is connected to a mixer of the aircraft air conditioning system to supply ambient air to the mixer, and a refrigerating machine which comprises a refrigerant circuit configured to have a refrigerant flow therethrough, the refrigerant circuit being thermally coupled to the ambient air line to transfer heat, from the ambient air flowing through the ambient air line, to the refrigerant circulating in the refrigerant circuit, before the ambient air is supplied into the mixer. A control device is configured to control the ambient air flow through the ambient air line such that the ambient air is selectively conducted through different sections of the ambient air line or different bypass lines running parallel to the sections of the ambient air line. 1. An aircraft air conditioning system comprising:an ambient air line, configured to have ambient air flow therethrough and which is connected to a mixer of the aircraft air conditioning system to supply ambient air to the mixer, anda refrigerating machine which comprises a refrigerant circuit configured to have a refrigerant flow therethrough, the refrigerant circuit being thermally coupled to the ambient air line to transfer heat, from the ambient air flowing through the ambient air line, to the refrigerant circulating in the refrigerant circuit, before the ambient air is supplied into the mixer,wherein a control device is configured to control the ambient air flow through the ambient air line such thatthe ambient air is firstly selectively conducted either through a first section of the ambient air line, in which a first ambient air compressor for compressing the ambient air flowing through the first section of the ambient air line is arranged, or a first bypass line running parallel to the first section of the ambient air line,the ambient air is subsequently selectively conducted either through a ...

APPARATUS AND METHOD FOR HYBRID WATER HEATING AND AIR COOLING AND CONTROL THEREOF

A system for conditioning air circulated from an interior of a building includes a refrigerant path, an air-cooled condenser in the refrigerant path, a water-cooled condenser in the refrigerant path that transfers heat from refrigerant in the refrigerant path to the building water, an evaporator in the refrigerant path, and a control system. The control system moves the system between operation of the air-cooled condenser and the water-cooled condenser based upon predetermined system conditions. 1. A system for conditioning air and for heating water , comprising:a first refrigerant path;a second refrigerant path that is independent of the first refrigerant path;a first condenser in the first refrigerant path and the second refrigerant path and disposed in an air flow so that the first condenser transfers heat to air in the air flow path from refrigerant in the first refrigerant path that moves through the first condenser and transfers heat to the air from refrigerant in the second refrigerant path that moves through the first condenser;a second condenser in the first refrigerant path and that defines a water flow path so that the second condenser transfers heat to water in the water flow path from the refrigerant in the first refrigerant path that moves through the second condenser; anda control system in operative communication with the first refrigerant path and configured to direct the refrigerant in the first refrigerant path, in a first state of the first refrigerant path, to the first condenser and not to the second condenser and, in a second state of the first refrigerant path, to the second condenser,wherein the control system is configured to determine a condition under which the system activates the first refrigerant path and deactivates the second refrigerant path and to move the first refrigerant path from the second state to the first state responsively to the condition.2. The system as in claim 1 , wherein the condition is a level of a pressure in the ...

ROBUST FIXED-SEQUENCE CONTROL METHOD AND APPLIANCE FOR EXCEPTIONAL TEMPERATURE STABILITY

A method to control a fixed-sequence dual evaporator cooling system including providing a recurring cooling cycle cooling system wherein each recurring cooling cycle comprises first and second cooling cycles for cooling respective first and second interiors, a pump-out cycle for returning coolant to a condenser, and an idle cycle, and providing a processor to establish exceptions to the recurring cooling cycle. A step includes the processor monitoring first and second actual temperatures of the respective first and second interiors, selecting predetermined first and second control temperatures for the respective first and second interiors, and selecting a command input signal to supply to a compressor, the condenser fan, the first and second evaporator fans, and the valve of the cooling system during the recurring cooling cycle based upon the first and second actual temperatures and the predetermined first and second control temperatures to initiate the established exceptions. 1. A method for fixed-sequence control of a dual evaporator cooling system comprising the steps of:operating a cooling system in a recurring fixed-sequence cooling cycle wherein each recurring fixed-sequence cooling cycle includes at least a first cooling cycle for cooling a first interior and a second cooling cycle for cooling a second interior;establishing exceptions to the recurring fixed-sequence cooling cycle, wherein a processor establishes the exceptions;monitoring first and second actual temperatures of the first and second interiors, respectively;selecting predetermined first and second control temperatures for the first and second interiors, respectively; andselecting a command input signal to supply to the cooling system during the recurring fixed-sequence cooling cycle based upon the first and second actual temperatures and the predetermined first and second control temperatures to initiate the established exceptions.2. The method of claim 1 , further comprising the step of: ...

COMPRESSOR AND REFRIGERATION DEVICE

A compressor and a refrigeration device are provided. The compressor has a housing, a first cylinder, a first piston, a second cylinder and a second piston. The housing has a first air outlet port and a second air outlet port. The first cylinder has an accommodating cavity, and the first piston is eccentrically disposed in the first accommodating cavity. The second cylinder has a second accommodating cavity, and the second piston is eccentrically disposed in the second accommodating cavity. 1. A compressor comprising:a housing, wherein a first air outlet port and a second air outlet port not in communication with each other are disposed in the housing;a first cylinder and a first piston, wherein the first cylinder is provided with a first accommodating cavity, and the first piston is eccentrically disposed in the first accommodating cavity; anda second cylinder and a second piston, wherein the second cylinder is provided with a second accommodating cavity, and the second piston is eccentrically disposed in the second accommodating cavity.2. The compressor according to claim 1 , wherein:the inner diameter of the first cylinder is D1, an eccentric distance of the first piston relative to the first accommodating cavity is e1, the height of the first cylinder is H1, and an exhaust pressure of the first cylinder is P1, and the first cylinder exhausts gas through the first air outlet port; andthe inner diameter of the second cylinder is D2, an eccentric distance of the second piston relative to the second accommodation cavity is e2, the height of the second cylinder is H2, and an exhaust pressure of the second cylinder is P2, and the second cylinder exhausts gas through the second air outlet port;wherein P1 Подробнее

REFRIGERATION CYCLE APPARATUS

A refrigeration cycle apparatus includes a refrigerant circuit, a controller, a bypass pipe, a refrigerant cooler, a second expansion device, and a controller temperature sensor. In a case where a temperature measured by the controller temperature sensor is lower than or equal to a set temperature in a state where an opening degree of the second expansion device is controlled to an instruction opening degree that is lower than or equal to a set opening degree, the controller is configured to perform foreign substance release control where the controller is configured to increase the opening degree of the second expansion device and then is configured to return the opening degree of the second expansion device to the instruction opening degree. 1. A refrigeration cycle apparatus , comprising:a refrigerant circuit through which refrigerant circulates, the refrigerant circuit including a compressor, a heat-source-side heat exchanger, a first expansion device, and a load-side heat exchanger;a bypass pipe branched from a pipe between the compressor and the first expansion device, and connected to a pipe connected to a suction port of the compressor;a second expansion device provided in the bypass pipe, the second expansion device being configured to regulate a flow rate of the refrigerant flowing through the bypass pipe;a refrigerant cooler through which the refrigerant flows, the refrigerant cooler being provided in the bypass pipe;a controller configured to control the compressor, the first expansion device, and the second expansion device, the controller being cooled by the refrigerant cooler; anda controller temperature sensor configured to measure a temperature of the controller,in a case where a temperature measured by the controller temperature sensor is lower than or equal to a set temperature in a state where an opening degree of the second expansion device is controlled to an instruction opening degree that is lower than or equal to a set opening degree, the ...

Energy Management For Refrigeration Systems

A system and method are provided including a system controller for a refrigeration or HVAC system having a compressor rack with a compressor and a condensing unit with a condenser fan. The system controller monitors and controls operation of the refrigeration or HVAC system. A rack controller monitors and controls operation of the compressor rack and determines compressor rack power consumption data. A condensing unit controller monitors and controls operation of the condensing unit and determines condensing unit power consumption data. The system controller receives the compressor rack power consumption data and the condensing unit power consumption data, determines a total power consumption of the refrigeration or HVAC system, determines a predicted power consumption or a benchmark power consumption for the refrigeration system, compares the total power consumption with the predicted power consumption or the benchmark power consumption, and generates an alert based on the comparison. 1. A system comprising:a system controller for a refrigeration or HVAC system having a compressor rack with at least one compressor and a condensing unit with at least one condenser fan, the system controller monitoring and controlling operation of the refrigeration or HVAC system;a rack controller in communication with the system controller, the rack controller monitoring and controlling operation of the compressor rack and determining compressor rack power consumption data; anda condensing unit controller in communication with the system controller, the condensing unit controller monitoring and controlling operation of the condensing unit and determining condensing unit power consumption data;wherein the system controller receives power consumption data from components of the refrigeration or HVAC system including at least the compressor rack power consumption data and the condensing unit power consumption data, determines a total power consumption of the refrigeration or HVAC ...

REFRIGERATION APPLIANCE WITH MULTIPLE TEMPERATURE ZONES

A refrigeration appliance includes first and second temperature zones and a refrigerant circuit having first and second parallel branches. The first branch has a controllable first restriction point and a first heat exchanger for setting a temperature of the first temperature zone, and the second branch has a second restriction point and a second heat exchanger for setting a temperature of the second temperature zone. A branching point, at which the refrigerant circuit splits into the two branches, is configured as a separator for separating gas and liquid and the second branch is connected to a liquid outlet of the separator. 1. A refrigeration appliance or domestic refrigeration appliance , comprising:first and second temperature zones;a refrigerant circuit having a branching point at which said refrigerant circuit splits into first and second parallel branches, said branching point being configured as a separator for separating gas and liquid, said separator having a liquid outlet;said first branch having a controllable first restriction point and a first heat exchanger for setting a temperature of said first temperature zone; andsaid second branch having a second restriction point and a second heat exchanger for setting a temperature of said second temperature zone, said second branch being connected to said liquid outlet of said separator.2. The refrigeration appliance according to claim 1 , wherein said controllable first restriction point is configured to be set for a pressure drop being smaller than a pressure drop of said second restriction point.3. The refrigeration appliance according to claim 1 , wherein said first branch has a controllable third restriction point downstream of said first heat exchanger.4. The refrigeration appliance according to claim 1 , wherein said separator has a hollow space claim 1 , and an inlet claim 1 , said liquid outlet and a gas outlet are formed at said hollow space.5. The refrigeration appliance according to claim 4 , ...

REFRIGERATION SYSTEM WITH INTEGRATED AIR CONDITIONING BY A HIGH PRESSURE EXPANSION VALVE

A system includes a flash tank coupled to refrigeration cases, and the flash tank houses a first refrigerant. The system further includes a gas cooler to cool the first refrigerant, a heat exchanger coupled to an air conditioning system, and a first high pressure expansion valve coupled to the gas cooler. The first high pressure expansion valve reduces a pressure of the first refrigerant flowing from the gas cooler to the heat exchanger. The system includes a second high pressure expansion valve coupled to the gas cooler, which reduces a pressure of the first refrigerant flowing from the gas cooler to the flash tank. The heat exchanger is coupled to the first high pressure expansion valve, and the heat exchanger receives the first refrigerant from the high pressure expansion valve, receives a second refrigerant from an air conditioning system, and provides cooling to the second refrigerant using the first refrigerant. 1. A system , comprising;a flash tank coupled to one or more refrigeration cases, the flash tank configured to house a first refrigerant;a gas cooler configured to cool the first refrigerant to a first temperature;a heat exchanger coupled to an air conditioning system;a first expansion valve coupled to the gas cooler, the first expansion valve configured to reduce a pressure of the first refrigerant flowing from the gas cooler to the heat exchanger;a second expansion valve coupled to the gas cooler, the second expansion valve configured to reduce a pressure of the first refrigerant flowing from the gas cooler to the flash tank; receive the first refrigerant from the first expansion valve;', 'receive a second refrigerant from an air conditioning system, the second refrigerant associated with an air conditioning load; and', 'provide cooling to the second refrigerant using the first refrigerant;, 'wherein the heat exchanger is coupled to the first expansion valve, the heat exchanger configured toa sensor associated with one or more compressors, the sensor ...

CHILLING SYSTEM USING WASTE HEAT RECOVERY BY CHILLER DISCHARGE GAS

A refrigeration system using waste heat recovery by refrigerator discharge gas is disclosed. The refrigeration system comprises a compressor configured to compress refrigent; a condenser configured to condense compressed refrigent introduced from the compressor; a main flow passage configured to deliver the refrigerant compressed in the compressor to the condenser; a heat storage tank configured to partially store the heat of the refrigerant discharged from the compressor; an auxiliary flow passage configured to deliver the refrigerant compressed in the compressor to the heat storage tank; an expansion valve configured to expand the refrigerant condensed in the condenser; and an evaporative-side composite heat exchanger configured to evaporate the expanded refrigerant, wherein the evaporative-side composite heat exchanger comprises an evaporation pipe through which the refrigerant expanded in the expansion valve passes and a defrost water supply pipe through which the circulating water in the heat storage tank passes. 1. A refrigeration system using waste heat recovery by refrigerator discharge gas , the system comprising:a compressor configured to compress refrigent;a condenser configured to condense compressed refrigent introduced from the compressor;a main flow passage configured to deliver the refrigerant compressed in the compressor to the condenser;a heat storage tank configured to partially store the heat of the refrigerant discharged from the compressor;an auxiliary flow passage configured to deliver the refrigerant compressed in the compressor to the heat storage tank;an expansion valve configured to expand the refrigerant condensed in the condenser; andan evaporative-side composite heat exchanger configured to evaporate the expanded refrigerant, an evaporation pipe through which the refrigerant expanded in the expansion valve passes and', 'a defrost water supply pipe through which the circulating water in the heat storage tank passes., 'wherein the ...

Multi-Evaporation Cooling System

A multiple-evaporation cooling system in which the intermediate heat exchanger of first evaporation line includes at least a segment of the physically arranged expansion device in contact with at least a portion of the second row of evaporation and the intermediate heat exchanger's second evaporative line includes at least one expansion device segment physically disposed in contact with at least one portion of a first evaporation line. Considering the temperature of the intermediate heat exchanger of first evaporation line influences the temperature of the refrigerant flowing in the second line of evaporative expansion device and the temperature of the intermediate heat exchanger of the second evaporative line influences the temperature of the refrigerant flowing in the first line of evaporative expansion device. Features include varying the restriction of the respective expansion devices and then unduly inhibit mass transfer of refrigerant between at least two distinct evaporation. 1. Multi-evaporation cooling system , comprising:{'b': 1', '1', '2, 'at least one compression arrangement () capable of operating with at least two distinct evaporation lines (Levap , Levap );'}{'b': 1', '41', '51', '61, 'the first evaporation line (Levap ) being comprised by at least one expansion device (), at least one evaporator () and at least one intermediate heat exchanger ();'}{'b': 2', '42', '52', '62, 'the second evaporation line (Levap ) being comprised by at least one expansion device (), at least one evaporator () and at least one intermediate heat exchanger ();'}{'b': 41', '61, 'the expansion device () and the intermediate heat exchanger () comprising the same capillary;'}{'b': 42', '62, 'the expansion device () and the intermediate heat exchanger () comprising the same capillary;'}said multi-evaporative cooling system being comprised by the fact that:{'b': 61', '1', '41', '2, 'the intermediate heat exchanger () of first evaporation line (Levap ) comprises at least one ...

Artificial refrigerator and method for controlling the same

Disclosed is an artificial refrigerator. The artificial refrigerator according to the present disclosure includes at least one sensor for sensing an operation state of the refrigerator and obtaining operation information about the operation state of the refrigerator and a processor that determines whether the operation state of the refrigerator is normal or abnormal using a deep-learning-based first diagnosis engine based on the operation information obtained using the at least one sensor and diagnoses, upon determination of the abnormality, a cause of the abnormality using a deep-learning-based second diagnosis engine. In the artificial refrigerator of the present invention, at least one of a user terminal or a server may be associated with an artificial intelligence module, a drone (Unmanned Aerial Vehicle, UAV) robot, an augmented reality (AR) device, a virtual reality (VR) device, a device related to a 5G service, and the like.

REFRIGERATING SYSTEM AND PURIFICATION METHOD FOR THE SAME

The present invention provides a refrigerating system, including: a refrigerating loop (), including a compressor (), a condenser (), a main throttling element (), and an evaporator () that are connected in sequence through a pipeline; and a purification loop (), including a purification compressor (), a purification condenser (), a purification throttling element (), and a low-temperature separator () that are connected in sequence through a pipeline, the purification loop being bidirectionally connected to the refrigerating loop through the low temperature separator and configured to separate a non-condensable gas in the refrigerating loop; wherein the purification condenser is capable of exchanging heat with a refrigerant in the refrigerating loop. Thus, efficient and reliable separation of the refrigerant and the non-condensable gas is achieved. 1. A refrigerating system , comprising:a refrigerating loop, comprising a compressor, a condenser, a main throttling element, and an evaporator that are connected in sequence through a pipeline; anda purification loop, comprising a purification compressor, a purification condenser, a purification throttling element, and a low-temperature separator that are connected in sequence through a pipeline, the purification loop being bi-directionally connected to the refrigerating loop through the low temperature separator and configured to separate a non-condensable gas in the refrigerating loop;wherein the purification condenser is capable of exchanging heat with a refrigerant in the refrigerating loop.2. The refrigerating system according to claim 1 , further comprising a first auxiliary flow path claim 1 , of which a first end is connected with the condenser and a second end is connected with the evaporator; when the refrigerating system runs claim 1 , the purification condenser exchanging heat with the refrigerant in the refrigerating loop through the first auxiliary flow path.3. The refrigerating system according to claim 2 ...

Refrigeration Capacity Control Device

This disclosure describes both a method of use for, and embodiments of, an apparatus to continuously modulate the capacity in air conditioning systems, said apparatus comprising: a liquid injection valve, comprising: a liquid line connection point, a temperature sensing element and a flashed liquid connection point; a low pressure regulating valve, comprising: a compressor discharge connection point, an Optional LPRV Gas Spring Reservoir and an LPRV discharge port; and a mixing chamber comprising: a suction connection point, a flashed liquid injection point, a superheated gas injection point, a means for fill material retention, a mixing chamber, a thermodynamic catalyst fill material, and a mixing nozzle assembly.

MULTI-EVAPORATOR APPLIANCE HAVING A MULTI-DIRECTIONAL VALVE FOR DELIVERING REFRIGERANT TO THE EVAPORATORS

A refrigerating appliance includes a refrigerant line having a compressor and a condenser. A thermal exchange media is delivered from the condenser and through the refrigerant line to at least a freezer evaporator of a plurality of evaporators, wherein the thermal exchange media leaving the freezer evaporator defines spent media that is returned to the compressor. A multi-directional outlet valve selectively delivers the thermal exchange media to the freezer evaporator, wherein the multi-directional outlet valve also selectively delivers the thermal exchange media to at least one secondary evaporator of the plurality of evaporators to define a partially-spent media that is delivered to the freezer evaporator. 1. A refrigerating appliance comprising:a refrigerant line having a compressor and a thermal exchange media;a plurality of heat exchangers that selectively receive the thermal exchange media, the plurality of heat exchangers including a freezer evaporator, a pantry evaporator and a refrigerator evaporator; anda multi-directional inlet valve that receives the thermal exchange media from at least one of the compressor, the pantry evaporator and the refrigerator evaporator, wherein the multi-directional inlet valve delivers the thermal exchange media to the freezer evaporator.2. The refrigerating appliance of claim 1 , further comprising:a multi-directional outlet valve that receives the thermal exchange media from the compressor and delivers the thermal exchange media to the multi-directional inlet valve.3. The refrigerating appliance of claim 2 , wherein the multi-directional outlet valve is selectively operable to also deliver the thermal exchange media to at least one of the pantry evaporator and the refrigerator evaporator and then to the multi-directional inlet valve.4. The refrigerating appliance of claim 3 , wherein the refrigerant line includes a first portion that extends from the multi-directional outlet valve and defines a plurality of refrigerant ...

REFRIGERATION CABINET AND REFRIGERATION CABINET OPERATION METHOD

A refrigeration cabinet includes a freezing compartment, a first evaporator and a second evaporator. The freezing compartment includes a freezing compartment door, and the first evaporator and the second evaporator are both equipped in the freezing compartment. The first evaporator is turned off and a second evaporator is working while the freezing compartment door is opened. In addition, a refrigeration cabinet operation method is also disclosed herein. 1. A refrigeration cabinet , comprising:a freezing compartment, the freezing compartment comprising a freezing compartment door;a first evaporator equipped in the freezing compartment; anda second evaporator equipped in the freezing compartment, wherein as the freezing compartment door is opened, the first evaporator is turned off and the second evaporator is working.2. The refrigeration cabinet of claim 1 , wherein the first evaporator is working when the freezing compartment door is closed.3. The refrigeration cabinet of claim 1 , wherein the second evaporator is turned off when the freezing compartment door is closed.4. The refrigeration cabinet of claim 1 , wherein the first evaporator is working at a first predetermined time and the second evaporator is turned off at a second predetermined time after the freezing compartment door is closed.5. The refrigeration cabinet of claim 1 , further comprising a controller to turn off the first evaporator and operate the second evaporator.6. The refrigeration cabinet of claim 1 , wherein the second evaporator is working when the freezing compartment door is detected to be opened.7. The refrigeration cabinet of claim 1 , wherein a density of heat dissipation fins of the first evaporator is greater than a density of heat dissipation fins of the second evaporator.8. The refrigeration cabinet of claim 1 , further comprising at least one sensor detecting whether the freezing compartment door is opened or closed claim 1 , wherein the sensor comprises a temperature sensor claim ...

REFRIGERATION CIRCUIT

Refrigeration circuit () comprising in the direction of flow of a circulating refrigerant: a compressor unit () comprising at least one compressor (); a heat rejecting heat exchanger/gas cooler (); a high pressure expansion device (); a receiver (); an expansion device (); an evaporator (); and a low pressure gas-liquid-separation unit comprising at least two collecting containers () which are configured for alternately separating a liquid phase portion from the refrigerant leaving the evaporator () and delivering the separated liquid refrigerant back to the receiver (). 111a;c. Refrigeration circuit () comprising in the direction of flow of a circulating refrigerant:{'b': 2', '2', '2', '2, 'i': a,', 'b,', 'c, 'a compressor unit () comprising at least one compressor ();'}{'b': '4', 'a heat rejecting heat exchanger/gas cooler ();'}{'b': 6', '50, 'a high pressure expansion device (; );'}{'b': '8', 'a receiver ();'}{'b': 10', '10, 'an expansion device (), in particular a normal cooling temperature expansion device ();'}{'b': 12', '12, 'an evaporator (), in particular a normal cooling temperature evaporator (); and'}{'b': 32', '34, 'a low pressure gas-liquid-separation unit comprising at least two collecting containers (, ); wherein'}{'b': 13', '12', '32', '32, 'i': 'a', 'an outlet () of the evaporator () is fluidly connected to an inlet () of a first collecting container ();'}{'b': 3', '2', '32', '32, 'i': 'b', 'an inlet side () of the compressor unit () is fluidly connected to a gas outlet () of the first collecting container ();'}{'b': 32', '32', '36', '34', '34, 'i': c', 'a, 'a liquid outlet () of the first collecting container () is fluidly connected via an inlet valve () to an inlet () of the second collecting container (); and'}{'b': 34', '34', '38', '8, 'i': 'c', 'a liquid outlet () of the second collecting container () is fluidly connected via an outlet valve () to the receiver ().'}2113488323434a;c. Refrigeration circuit () according to claim 1 , wherein the ...

ENERGY EFFICIENCY OF AIR CONDITIONING SYSTEM BY USING DUAL SUCTION COMPRESSOR

A method for selectively transferring latent and sensible heat from air in a cooling system of a building structure interior volume that includes at least the steps of: (1) providing a building structure air conditioning system that provides cooling to at least a portion of the interior volume of a building structure and (2) adjusting a ratio of a time coolant flows through the first evaporator to a time coolant flows through the second evaporator such that coolant flows through the first evaporator for more time than the second evaporator when more latent heat is removed from the air and more coolant flows through the second evaporator for more time than the first evaporator when more sensible heat is removed from the air. 1. A method for selectively transferring latent and sensible heat from air in a cooling system of a building structure interior volume , the method comprising the steps of:providing a building structure air conditioning system that provides cooling to at least a portion of the interior volume of a building structure wherein the air conditioning system comprises:a compressor having a suction valve or suction valves;a condenser having a condenser fan associated with the condenser that moves air to cool the condenser;at least two evaporators wherein a first evaporator operates at a first evaporator pressure and a second evaporator operates at a second evaporator pressure that is different than the first evaporator pressure;at least a first throttling device in coolant fluid communication with the first evaporator and a second throttling device associated with the second evaporator and wherein the first throttling device and the second throttling device have different throttling characteristics with the first throttling device being less restrictive than a second throttling device; anda plurality of refrigerant conduits containing refrigerant fluid fluidly connecting the compressor, condenser, the first throttling device, the second throttling device ...

Refrigeration device

There is disclosed a refrigeration device in which a cooling capability and efficiency can be improved by controlling a high pressure side pressure of a low stage side refrigerant circuit into an optimum value. A refrigeration device 1 includes a high stage side refrigerant circuit 4 , first and second low stage side refrigerant circuits 6 A and 6 B, and cascade heat exchangers 43 A and 43 B to evaporate a refrigerant of the high stage side refrigerant circuit 4 , thereby cooling high pressure side refrigerants of the low stage side refrigerant circuits 6 A and 6 B, and carbon dioxide is charged as the refrigerant in each of the refrigerant circuits 4, 6 A and 6 B, and in the device, there are disposed pressure adjusting expansion valves 31 to adjust high pressure side pressures of the low stage side refrigerant circuits 6 A and 6 B.

Energy Management For Refrigeration Systems

A system and method are provided including a system controller for a refrigeration or HVAC system having a compressor rack with a compressor and a condensing unit with a condenser fan. The system controller monitors and controls operation of the refrigeration or HVAC system. A rack controller monitors and controls operation of the compressor rack and determines compressor rack power consumption data. A condensing unit controller monitors and controls operation of the condensing unit and determines condensing unit power consumption data. The system controller receives the compressor rack power consumption data and the condensing unit power consumption data, determines a total power consumption of the refrigeration or HVAC system, determines a predicted power consumption or a benchmark power consumption for the refrigeration system, compares the total power consumption with the predicted power consumption or the benchmark power consumption, and generates an alert based on the comparison. 16-. (canceled)7. A system comprising:a system controller for a refrigeration or HVAC system having a compressor rack with at least one compressor and a condensing unit with at least one condenser fan, the system controller monitoring and controlling operation of the refrigeration or HVAC system;a rack controller in communication with the system controller, the rack controller monitoring and controlling operation of the compressor rack and determining compressor rack power consumption data; anda condensing unit controller in communication with the system controller, the condensing unit controller monitoring and controlling operation of the condensing unit and determining condensing unit power consumption data;wherein the system controller receives the compressor rack power consumption data and the condensing unit power consumption data, determines a total power consumption of the refrigeration or HVAC system based on the compressor rack power consumption data and the condensing unit ...

REFRIGERATION CYCLE DEVICE

A refrigeration cycle device includes a compressor configured to compress and discharge a refrigerant containing oil, a refrigerant radiator configured to heat the ventilation air using the refrigerant discharged from the compressor as a heat source during a room interior heating, a refrigerant decompression unit configured to decompress the refrigerant having passed through the refrigerant radiator, an evaporator configured to evaporate the refrigerant and to function as a heat absorber during the room interior heating; and a controller configured to control the refrigerant decompression unit and to perform a fluctuation operation at least during the room interior heating. In the fluctuation operation, a throttle opening degree of the refrigerant decompression unit is changed such that a refrigerant state on a refrigerant outlet side of the evaporator is alternately changed to a superheated state having a superheat degree and a wet state containing the wet vapor.

Unit cooler with staggered defrost on a plurality of evaporator coils

An HVAC system includes a unit cooler, which includes a first evaporator coil, a second evaporator coil, and a blower. The HVAC system further includes a first sensor, a second sensor, a first valve, a second valve, and a controller. The controller actuates the blower to direct air to flow over the first evaporator coil and the second evaporator coil, receives measurements from the first sensor and the second sensor, initiates a defrost cycle for the first evaporator coil by transmitting instructions to close the first valve to prevent the flow of refrigerant into the first evaporator coil, transmits instructions to open the first valve when the defrost cycle for the first evaporator coil has terminated, and initiates a defrost cycle for the second evaporator coil by transmitting instructions to close the second valve to prevent the flow of refrigerant into the second evaporator coil.

Floating Evaporator Saturated Suction Temperature Systems And Methods

Systems and methods are provided and include a case controller for a refrigeration case of a refrigeration system. The case controller is configured to: determine an evaporator saturated suction temperature (SST) of an evaporator of the refrigeration case; control an evaporator pressure regulator of the refrigeration system based on a comparison of the evaporator SST with an evaporator saturated suction temperature (SST) setpoint; receive an air temperature value from an air temperature sensor associated with the refrigeration case; determine whether the air temperature value is within a predetermined range of an air temperature setpoint; and adjust the SST setpoint in response to the air temperature value being outside of the predetermined range of the air temperature setpoint. 1. A system comprising: determine an evaporator saturated suction temperature (SST) of an evaporator of the refrigeration case;', 'control an evaporator pressure regulator of the refrigeration system based on a comparison of the evaporator SST with an evaporator saturated suction temperature (SST) setpoint;', 'receive an air temperature value from an air temperature sensor associated with the refrigeration case;', 'determine whether the air temperature value is within a predetermined range of an air temperature setpoint; and', 'adjust the SST setpoint in response to the air temperature value being outside of the predetermined range of the air temperature setpoint., 'a case controller for a refrigeration case of a refrigeration system, the case controller being configured to2. The system of claim 1 , wherein the case controller is further configured to increase the SST setpoint in response to the air temperature value being outside of the predetermined range and below the air temperature setpoint and to decrease the SST setpoint in response to the air temperature value being outside of the predetermined range and above the air temperature setpoint.3. The system of claim 1 , wherein the air ...

Refrigerator and method for controlling the same

The method for controlling the refrigerator includes operating a first cooling cycle for cooling the first storage compartment to operate the compressor and operating a first fan for the first storage compartment, and switching the first cooling cycle to a second cooling cycle for cooling the second storage compartment to operate the compressor and operating a second fan when a stop condition of the first cooling cycle is satisfied. A temperature of each storage compartment is sensed at sampling time intervals in each cooling cycle. Further, a cooling power of the compressor is determined for each sampling time based on a sensed current temperature of the storage compartment, and the compressor is operated at the determined cooling power.

Refrigeration circuits, environmental control systems, and methods of controlling flow in refrigeration circuits

A refrigeration circuit includes a primary loop, a secondary loop connected to the primary loop, a first expansion valve connected to the secondary loop, and a second expansion valve. The second expansion valve is connected to the secondary loop and is in parallel with the first expansion valve to control thermal communication between the refrigeration circuit and a first heat load independent of thermal communication between the refrigeration circuit and a second heat load. Environmental control systems and methods of controlling refrigerant flow in refrigeration circuits are also described.

Cooling Circuit, Cold Drying Installation and Method for Controlling a Cooling Circuit

A cooling circuit is equipped with a coolant, a compressor, a condenser and evaporator expansion valve combinations, whereby the outlets of the evaporators are connected to a collection pipe connected to the compressor. The cooling circuit comprises a control unit connected to a temperature sensor and a pressure sensor affixed in the collection pipe and connected to the expansion valves for the control of them. The control unit is provided with an algorithm for controlling the expansion valves on the basis of the temperature sensor and pressure sensor to control the superheating in the collection pipe. 1. A method for controlling a cooling circuit including a coolant , a compressor , a condenser and evaporator expansion valve combinations incorporated in parallel in the cooling circuit , from which the outgoing coolant flows are mixed together into a combined coolant flow that is drawn in by the compressor , and wherein each evaporator forms a section of a separate heat exchanger , wherein the superheating of the combined coolant flow is controlled according to a target value by determining it and then jointly controlling the expansion valves , wherein the evaporators form the primary section of separate heat exchangers that each also comprise a secondary section through which a gas to be dried is guided; that the lowest gas temperature of each separate heat exchanger is controlled according to the same target value by controlling each expansion valve separately on the basis of a difference between a measured lowest gas temperature of the heat exchanger belonging to the expansion valve and the target value.2. The method for controlling a cooling circuit according to claim 1 , wherein expansion valves are controlled on the basis of values of pressure and temperature measured in the collection pipe.3. The method according to claim 1 , wherein to control the superheating claim 1 , the positions of the expansion valves are adjusted in the same direction.4. The method ...

VENTILATION DEVICE AND INTEGRATED AIR CONDITIONING SYSTEM HAVING THE SAME

An integrated air conditioning system includes an outdoor unit, an indoor unit, and a ventilation device. The ventilation device includes a housing including an inlet flow path, and an outlet flow path, a total heat exchanger in which air flowing through the inlet flow path and air flowing through the outlet flow path exchange heat with each other, a first heat exchanger disposed on the inlet flow path to receive a refrigerant from the outdoor unit, a second heat exchanger disposed upstream of the first heat exchanger on the inlet flow path and connected to the first heat exchanger to be supplied with refrigerant discharged from the first heat exchanger, a first expansion device to expand the refrigerant supplied to the first heat exchanger from the outdoor unit, and a second expansion device to expand the refrigerant discharged from the first heat exchanger and supplied to the second heat exchanger. 1. An integrated air conditioning system , comprising:an outdoor unit including a compressor and a condenser to circulate a refrigerant; andan indoor unit connected to the outdoor unit; and a housing including an inlet flow path to suck outdoor air to an indoor space, and an outlet flow path to discharge indoor air to an outdoor space,', 'a total heat exchanger in which air flowing through the inlet flow path and air flowing through the outlet flow path exchange heat with each other,', 'a first heat exchanger disposed on the inlet flow path and configured to receive a refrigerant from the outdoor unit through a first refrigerant pipe,', 'a second heat exchanger disposed upstream of the first heat exchanger on the inlet flow path and configured to be supplied with refrigerant discharged from the first heat exchanger via a second refrigerant pipe connecting the second heat exchanger to the first heat exchanger,', 'a first expansion device disposed on the first refrigerant pipe to expand the refrigerant supplied from the outdoor unit to the first heat exchanger, and', 'a ...

SURGE CONTROL SUBCOOLING CIRCUIT

The disclosure describes a system that includes an evaporator, an accumulator downstream of the evaporator, a centrifugal compressor downstream of the accumulator, a first heat exchanger stage downstream of the centrifugal compressor, and a second heat exchanger stage downstream of the first heat exchanger stage. The evaporator is configured to cool a conditioned air stream using a refrigerant. The accumulator is configured to store excess refrigerant. The centrifugal compressor is configured to compress the refrigerant. The first heat exchanger stage is configured to cool the refrigerant using environmental air. The second heat exchanger stage is configured to cool the refrigerant from the first heat exchanger stage using a portion of the excess refrigerant from the accumulator. 1. A system , comprising:an evaporator configured to cool a pressurized air stream using a refrigerant;an accumulator downstream of the evaporator and configured to store excess refrigerant;a centrifugal compressor downstream of the accumulator and configured to compress the refrigerant;a first heat exchanger stage downstream of the centrifugal compressor and configured to cool the refrigerant using environmental air; anda second heat exchanger stage downstream of the centrifugal compressor and configured to cool the refrigerant from the first heat exchanger stage using a portion of the excess refrigerant from the accumulator.2. The system of claim 1 , wherein the portion of the excess refrigerant from the accumulator is gravity-fed to the second heat exchanger stage.3. The system of claim 1 , wherein the accumulator includes a liquid separator configured to separate liquid refrigerant from the refrigerant received from the evaporator and store the separated liquid refrigerant as the excess refrigerant.4. The system of claim 1 ,wherein the first heat exchanger stage comprises a condenser, andwherein the second heat exchanger stage comprises a subcooler.5. The system of claim 1 , wherein the ...

Refrigerator

A refrigerant is provided that may include at least one compressor that compresses a refrigerant, a condenser that condenses the refrigerant compressed in the at least one compressor, a first expansion device that decompresses the refrigerant condensed in the condenser, a gas/liquid separator that separates the refrigerant decompressed in the first expansion device into a liquid refrigerant and a gaseous refrigerant, first and second evaporators, to which the liquid refrigerant separated in the gas/liquid separator may be introduced, and a second expansion device disposed at an inlet-side of the second evaporator to decompress the refrigerant.

REFRIGERATION CYCLE OF REFRIGERATOR

A refrigeration cycle of a refrigerator includes a first refrigeration cycle in which a first refrigerant flows along a first refrigerant tube and a second refrigeration cycle in which a second refrigerant flows along a second refrigerant tube. First and second compressors compress each of the first and second refrigerants, and a combined condenser condenses each of the first and second refrigerants. First and second expansion valves phase-change each of the first and second refrigerants passing through the combined condenser, and first and second evaporators change the refrigerant passing through each of the first and second expansion valves into a low-temperature low-pressure gaseous refrigerant. 1. A refrigeration cycle of a refrigerator comprising a first refrigeration cycle in which a first refrigerant flows along a first refrigerant tube and a second refrigeration cycle in which a second refrigerant flows along a second refrigerant tube , the refrigeration cycle comprising:first and second compressors compressing each of the first and second refrigerants into a high-temperature high-pressure gaseous refrigerant;a combined condenser condensing each of the first and second refrigerants passing through the first and second compressors into a high-temperature high-pressure liquid refrigerant;first and second expansion valves phase-changing each of the first and second refrigerants passing through the combined condenser into a low-temperature low-pressure two-phase refrigerant; andfirst and second evaporators changing the refrigerant passing through each of the first and second expansion valves into a low-temperature low-pressure gaseous refrigerant,wherein the combined condenser comprises:first and second condensation tubes constituting portions of the first and second refrigerant tubes that connect the first and second compressors to the first and second expansion valves, respectively; andheat-exchange fins contacting surfaces of the first and second condensation ...

EJECTOR REFRIGERATION CIRCUIT

An ejector refrigeration circuit (), which is configured for circulating a refrigerant, in particular carbon dioxide, comprises at least two controllable ejectors (), which are connected in parallel and respectively comprise a primary high pressure input port (), a secondary low pressure input port () and an output port (); and a control unit (), which is configured for operating the ejector refrigeration circuit () employing a method which comprises the steps of: a) operating a first ejector () of the at least two controllable ejectors () by controlling the opening of its high pressure port () until the maximum efficiency of said first ejector () has been reached or the actual refrigeration demands are met; b) operating at least one additional ejector () of the at least two controllable ejectors () by opening its primary high pressure input port () for increasing the refrigeration capacity of the ejector refrigeration circuit () in case the actual refrigeration demands are not met by operating the first ejector () alone. 1167100676767a,ab,bc,c. Method of operating an ejector refrigeration circuit () with at least two controllable ejectors ( , ) connected in parallel and respectively comprising a controllable motive nozzle () , a primary high pressure input port () , a secondary low pressure input port () and an output port () , wherein the method comprises the steps of:{'b': 6', '6', '7', '6', '6, 'i': 'a', 'a) operating a first ejector () of the at least two controllable ejectors (, ) by controlling the opening degree of its primary high pressure input port () until the maximum efficiency of said first ejector () has been reached or the actual refrigeration demands are met;'}{'b': 7', '6', '7', '6', '7', '1', '6, 'i': a,', 'a, 'b) operating at least one additional ejector () of the at least two controllable ejectors (, ) by gradually opening its primary high pressure input port () for increasing the refrigeration capacity of the ejector refrigeration circuit () in ...

3 stage cooling and defrosting system using quick-freezing chamber, freezing chamber, and refrigerating chamber

The present invention relates to a system for cooling a quick-freezing chamber at −40 to −30° C., a freezing chamber at −20 to −15° C., a refrigerating chamber at 0 to 5° C., and the like and an energy-saving defrosting system for defrosting the quick-freezing chamber, the freezing chamber, and the refrigerating chamber using condensed waste heat.

PARALLEL EVAPORATOR CIRCUIT WITH BALANCED FLOW

Provided is a pumped loop system () for cooling a heat-generating components without relying on a maximum heat load, the system including first and second evaporators (-) in parallel with one another and first and second valves (-) upstream of the first and second evaporators respectively, wherein the valves (-) are controllable to vary the flow rate of fluid to the respective evaporator (-) based on the amount of flow needed to control the respective heat-generating component. By cooling the heat-generating components without relying on the maximum heat load, adequate flow may be provided to an evaporator operating under a high heat low while reduced flow is provided to an evaporator operating under a low head load. 1. A pumped loop system for cooling heat-generating components including:a first branch having a first evaporator for absorbing heat from a first heat-generating component having a variable heat load and a first valve upstream of the first evaporator for variably controlling the flow of fluid to the first branch;a second branch parallel to the first branch, the second branch having a second evaporator for absorbing heat from a second heat-generating component having a variable heat load and a second valve upstream of the second evaporator for variably controlling the flow of fluid to the second branch;a pump for pumping fluid to the first and second branches;a condenser downstream of the first and second branches and upstream of the pump for rejecting the heat absorbed by the fluid in the first and second branches; andat least one controller configured to control at least one of the first valve and the second valve.2. The pumped loop system according to claim 1 ,wherein the first and second valves are electronic stepper valves.3. (canceled)4. The pumped loop system according to claim 1 , wherein the at least one controller comprises a first and second controller for controlling the first and second valves claim 1 , respectively.5. The pumped loop system ...

REFRIGERANT COOLING FOR VARIABLE SPEED DRIVE

An example refrigerant system according to an exemplary aspect of this disclosure includes, among other things, a refrigerant loop having at least a condenser, an evaporator, and a compressor. The compressor includes a motor in communication with a variable speed drive. The system further includes a cooling circuit including a pressure regulator downstream of a heat exchanger, the heat exchanger absorbing heat from the variable speed drive. 1. A refrigerant system , comprising:a refrigerant loop including at least a condenser, an evaporator, and a compressor, the compressor including a motor in communication with a variable speed drive; anda cooling circuit including a pressure regulator downstream of a heat exchanger, the heat exchanger absorbing heat from the variable speed drive.2. The refrigerant system as recited in claim 1 , further comprising:a temperature sensor mounted to the variable speed drive, the temperature sensor configured to produce an output indicative of the temperature of the variable speed drive; anda controller configured to receive the output from the temperature sensor, and to command an adjustment of the pressure regulator based on the output from the temperature sensor.3. The refrigerant system as recited in claim 2 , wherein the controller commands an adjustment of the pressure regulator when the output from the temperature sensor indicates that the temperature of the variable speed drive has deviated from a target temperature.4. The refrigerant system as recited in claim 3 , wherein the target temperature is predetermined.5. The refrigerant system as recited in claim 1 , wherein the cooling circuit includes an expansion valve upstream of the heat exchanger.6. The refrigerant system as recited in claim 5 , further comprising:a temperature sensor downstream of the heat exchanger, the temperature sensor configured to produce an output indicative of the temperature of the refrigerant within the cooling circuit at a location downstream of the ...

Microprocessor-controlled beverage dispenser

A microprocessor-controlled beverage dispenser is disclosed, which provides a cold plate having disposed therein beverage lines and refrigerant lines. The refrigerant lines may be connected to a cooling or refrigeration system, including a heat exchanger. The beverage lines may be connected to a beverage supply for dispensing a desired beverage. Valves and pressure sensors in the refrigerant line are engaged with a microprocessor. If the temperature falls below a desired value, then the cooling system is shut off. This permits the microprocessor to closely control the temperature of the beverage being dispensed.

MULTI-COMPARTMENT TRANSPORT REFRIGERATION SYSTEM WITH EVAPORATOR ISOLATION VALVE

A multi-compartment transport refrigeration system includes a heat rejecting heat exchanger downstream of a compressor discharge port; a first evaporator expansion device downstream of the heat rejecting heat exchanger; a first evaporator having an first evaporator inlet coupled to the first evaporator expansion device and a first evaporator outlet coupled to the compressor inlet path, the first evaporator for cooling a first compartment; a second evaporator expansion device downstream of the heat rejecting heat exchanger; a second evaporator having a second evaporator inlet coupled to the second evaporator expansion device and a second evaporator outlet coupled to the compressor inlet path, the second evaporator for cooling a second compartment; and a first evaporator outlet isolation valve positioned in an outlet of the first evaporator, the first evaporator outlet isolation valve to prevent migration of refrigerant from the second evaporator outlet to the first evaporator outlet. 1. A multi-compartment transport refrigeration system comprising:a compressor having a suction port and a discharge port, the compressor suction port coupled to a compressor inlet path;a heat rejecting heat exchanger downstream of the compressor discharge port;a first evaporator expansion device downstream of the heat rejecting heat exchanger;a first evaporator having an first evaporator inlet coupled to the first evaporator expansion device and a first evaporator outlet coupled to the compressor inlet path, the first evaporator for cooling a first compartment of a container;a second evaporator expansion device downstream of the heat rejecting heat exchanger;a second evaporator having a second evaporator inlet coupled to the second evaporator expansion device and a second evaporator outlet coupled to the compressor inlet path, the second evaporator for cooling a second compartment of the container; anda first evaporator outlet isolation valve positioned in an outlet of the first ...

COOLING SYSTEM FOR LOW TEMPERATURE STORAGE

The present invention relates to a cooling system for a low temperature storage. The cooling system for the low temperature storage according to an embodiment of the present invention comprises: a first outdoor valve disposed between a compressor and an outdoor heat exchanger and selectively restricting an inflow of a refrigerant into the outdoor heat exchanger; and a first bypass pipe branched from an inlet side of the first outdoor valve and guiding the refrigerant to bypass the outdoor heat exchanger, so that the refrigerant can be guided to bypass the outdoor heat exchanger during defrosting operation of the cooling system. 1. A cooling system for a cold storage comprising:a compressor configured to compress a refrigerant;an outdoor heat exchanger disposed at an outlet side of the compressor;a first outdoor valve disposed between the compressor and the outdoor heat exchanger to selectively restrict inflow of a refrigerant into the outdoor heat exchanger;a first bypass pipe branched from an inlet side of the first outdoor valve to guide a refrigerant to bypass the outdoor heat exchanger;a suction connection pipe branched from an outlet side of the first outdoor valve to guide a refrigerant passing through the outdoor heat exchanger to a suction side of the compressor;a first evaporator into which a refrigerant flowing through the first bypass pipe is introduced to perform defrost; anda second evaporator disposed at an outlet side of the first evaporator to evaporate a refrigerant passing through the first evaporator.2. The cooling system of claim 1 , further comprising:a discharge pipe configured to extend from the outlet side of the compressor to the outdoor heat exchanger; anda liquid pipe disposed at an outlet side of the outdoor heat exchanger, a refrigerant condensed in the outdoor heat exchanger flowing through the liquid pipe.3. The cooling system of claim 2 , further comprisinga first branch portion connected to one end of the first bypass pipe; anda ...

HEATING AND COOLING SYSTEMS AND METHODS FOR TRUCK CABS

A vehicle heating and cooling system has a vehicle evaporator coil, a vehicle HVAC user interface, a compressor, a compressor coil, and a controller. The controller is connected between the vehicle HVAC user interface and the compressor. The compressor and compressor coil are connected to the vehicle evaporator coil. 1. A vehicle heating and cooling system comprising:at least one battery;a vehicle evaporator coil;a vehicle HVAC user interface;a vehicle compressor;an auxiliary compressor;a vehicle compressor coil;an auxiliary compressor coil; in the vehicle mode, the vehicle compressor is operatively connected to the vehicle evaporator coil and to the vehicle compressor coil and the auxiliary compressor and the auxiliary compressor coil are disconnected from the vehicle evaporator coil, and', 'in the auxiliary mode, the vehicle compressor and vehicle compressor coil are disconnected from the vehicle evaporator coil and the auxiliary compressor is operatively connected to the vehicle evaporator coil and to the auxiliary compressor coil; and, 'an auxiliary control valve array configured to operate in vehicle and auxiliary modes, where'}a controller for selectively controlling the auxiliary control valve array to operate in one ofthe vehicle mode and the auxiliary mode; whereinthe auxiliary compressor is operatively connected to the at least one battery.2. The vehicle heating and cooling system as recited in claim 1 , further comprising a vehicle internal combustion engine claim 1 , where the auxiliary compressor is not mechanically connected to the vehicle internal combustion engine.3. The vehicle heating and cooling system as recited in claim 1 , in which the at least one battery comprises a vehicle battery claim 1 , the system further comprising a control system configured to operatively connect the vehicle battery to at least one of the vehicle compressor and the auxiliary compressor.4. The vehicle heating and cooling system as recited in claim 1 , in which the at ...

HEAT PUMP SYSTEM FOR VEHICLE

The present invention relates to a heat pump system for a vehicle and, more particularly, to a heat pump system for a vehicle comprising: a first cooling water line connecting an outdoor heat exchanger (electric radiator) and an electronic component; a second cooling water line connecting a chiller and a battery; and a cooling water control means for controlling a flow of cooling water by connecting the first cooling water line and the second cooling water line. As such, not only waste heat of the electronic component but also waste heat of the battery can be utilized by means of the chiller in a heating mode to thereby improve heating performance, and the battery is cooled in a cooling mode so that heat exchange of the battery is possible. 1. A heat pump system for a vehicle in which a compressor , an outdoor heat exchanger , an expansion means , and an evaporator are connected to a refrigerant circulation line , the heat pump system comprising:a chiller connected to the refrigerant circulation line through a first bypass line in parallel;a first cooling water line which connects the outdoor heat exchanger and an electric component for the vehicle to circulate cooling water;a second cooling water line which connects the chiller and a battery for the vehicle to circulate cooling water; anda cooling water adjusting means which connects the first cooling water line and the second cooling water line with each other to adjust a flow of cooling water between the first and second cooling water lines,wherein through the chiller, waste heat of the electric component or the battery is recovered in a heating mode, and the battery is cooled to make heat management of the battery possible in a cooling mode.2. The heat pump system according to claim 1 , wherein the cooling water adjusting means comprises:a connection line which connects the first cooling water line and the second cooling water line in parallel to arrange the outdoor heat exchanger, the electric component, the ...

AIR CONDITIONING SYSTEM WITH SOLAR-POWERED SUBCOOLING SYSTEM

The air conditioning system with solar-powered subcooling system includes a main cooling system having an evaporator, a compressor, a condenser, and an expansion valve configured to operate in a conventional vapor compression refrigerant cycle. The subcooling system includes a compressor, a condenser, and an expansion valve, the compressor being powered by at least one rechargeable battery connected to a photovoltaic solar panel. The main system and the subcooling system are linked by a heat exchanger having a primary coil in the main system between the condenser and the expansion valve and a secondary coil in the subcooling system disposed between the expansion valve and the compressor. The main system and the subcooling system may use the same type of refrigerant, or different refrigerant types. The additional cooling provided to the refrigerant in the main system by subcooling increases the efficiency of the air conditioning system. 1. An air conditioning system with solar-powered subcooling system , comprising: an evaporator;', 'a compressor;', 'a condenser;', 'an expansion valve;', 'conduit connecting the evaporator, the compressor, the condenser, and the expansion valve in that order to form a main air conditioning cycle; and', 'a main air conditioning system refrigerant circulating through the main air conditioning conduit;, 'a main air conditioning system having a compressor;', 'a condenser;', 'an expansion valve;', 'conduit connecting the compressor, the condenser, and the expansion valve in that order to form a subcooling cycle;', 'at least one rechargeable battery connected to the compressor;', 'a solar photovoltaic panel connected to the at least one rechargeable battery, whereby the subcooling system is powered without additional drain on a main utility system; and', 'a subcooling system refrigerant circulating through the subcooling conduit; and, 'a subcooling system having a first coil disposed in the main air conditioning conduit between the main air ...

COOLING SYSTEM

An apparatus includes a high side heat exchanger, a flash tank, a first load, a first oil separator, and a first compressor. The high side heat exchanger removes heat from a refrigerant. The flash tank stores the refrigerant. The first load uses the refrigerant to cool a first space proximate the first load. During a first mode of operation, the first oil separator separates an oil from the refrigerant from the first load and directs the refrigerant to an ejector. The ejector directs the refrigerant from the high side heat exchanger and the refrigerant form the first oil separator to the flash tank. The flash tank directs the refrigerant from the first oil separator to the first compressor. The first compressor compresses the refrigerant from the flash tank. During a second mode of operation, the first oil separator directs the oil separated from the refrigerant to the first compressor. 1. An apparatus comprising:a high side heat exchanger configured to remove heat from a refrigerant;a flash tank configured to store the refrigerant from the high side heat exchanger;a first load configured to use the refrigerant from the flash tank to cool a first space proximate the first load;a first oil separator; anda first compressor; [ separate an oil from the refrigerant from the first load;', 'direct the refrigerant to an ejector, the ejector configured to direct the refrigerant from the high side heat exchanger and the refrigerant form the first oil separator to the flash tank;, 'the first oil separator configured to, 'the flash tank configured to direct the refrigerant from the first oil separator to the first compressor; and', 'the first compressor configured to compress the refrigerant from the flash tank; and, 'during a first mode of operationduring a second mode of operation, the first oil separator configured to direct the oil separated from the refrigerant to the first compressor.2. The apparatus of claim 1 , wherein the first oil separator is configured to direct the ...

Adjustable cooling system

A refrigeration system comprises a variable speed compressor and a first evaporator. A second evaporator is operably coupled in series with the first evaporator. A first valve is coupled to the variable speed compressor and the first evaporator. A second valve is fluidly coupled to the second evaporator, and a pressure regulator is coupled to the second valve.

EJECTOR REFRIGERATION CIRCUIT

An ejector refrigeration circuit () comprises a high pressure ejector circuit () comprising in the direction of flow of a circulating refrigerant: a heat rejecting heat exchanger/gas cooler () having an inlet side () and an outlet side (); at least two variable ejectors () with different capacities connected in parallel, each of the variable ejectors () comprising a primary high pressure input port (), a secondary low pressure input port () and an output port (); wherein the primary high pressure input ports () of the at least two variable ejectors () are fluidly connected to the outlet side () of the heat rejecting heat exchanger/gas cooler (); a receiver (), having an inlet (), a liquid outlet (), and a gas outlet (), wherein the inlet () is fluidly connected to the output ports () of the at least two variable ejectors (); at least one compressor () having an inlet side ( b, ) and an outlet side (), the inlet side ( b, ) of the at least one compressor () being fluidly connected to the gas outlet () of the receiver (), and the outlet side () of the at least one compressor () being fluidly connected to the inlet side () of the heat rejecting heat exchanger/gas cooler (). The ejector refrigeration circuit () further comprises a refrigerating evaporator flowpath () comprising in the direction of flow of the circulating refrigerant: at least one refrigeration expansion device () having an inlet side (), fluidly connected to the liquid outlet () of the receiver (), and an outlet side (); at least one refrigeration evaporator () fluidly connected between the outlet side () of the at least one refrigeration expansion device () and the secondary low pressure input ports () of the at least two variable ejectors (). 11. Ejector refrigeration circuit () with:{'b': '3', 'claim-text': [{'b': 4', '4', '4, 'i': a', 'b, 'a heat rejecting heat exchanger/gas cooler () having an inlet side () and an outlet side ();'}, {'b': 6', '7', '6', '7', '100', '6', '7', '6', '7', '6', '7', '6', ...

A COOLING SYSTEM AND A METHOD FOR CONTROL THEREOF

A refrigerator apparatus having a compressor, a condenser, an evaporator, and a valve interconnected in the flow from the condenser to the evaporator. The valve is operatively controlled to a first, open, state and to a second, closed, state by a controller. The controller is configured to the valve to operate in accordance with at least one of: opening the valve a time period of 0-180 seconds before the compressor is switched to an on-phase; and closing the valve before the compressor is switched to an off-phase. 1. A cooling system comprising:a compressor;a condenser;and an evaporator system fluidly connected to the compressor and condenser, the evaporator system, compressor and condenser being configured to contain refrigerant for circulation therethrough;a valve fluidly interconnected between the condenser and the evaporator system; opening the valve a time period of 0-180 seconds before the compressor is switched to an on-phase; and', 'closing the valve before the compressor is switched to an off-phase., 'a controller operatively connected to the valve and configured to move the valve between a first, open, state when the compressor is in an on-phase and a second, closed, state when the compressor is in an off state, wherein the controller is adapted to control the valve to operate in accordance with at least one of2. The cooling system according to claim 1 , where the controller is adapted to open the valve before the compressor is switched to an on-phase claim 1 , wherein the time period is set to 5-120 seconds before the compressor is switched to an on-phase.3. The cooling system according to claim 2 , where the controller is adapted to open the valve before the compressor is switched to an on-phase claim 2 , wherein the time period is set to 10-80 seconds before the compressor is switched to an on-phase.4. The cooling system according to claim 1 , where the controller is adapted to open the valve before the compressor is switched to an on-phase claim 1 , ...

SYSTEM AND METHOD FOR COOLING POWER ELECTRONICS USING HEAT SINKS

A heat pump includes a main refrigerant circuit having a compressor, an indoor heat exchanger, and an outdoor heat exchanger, and a reversing valve. A biflow expansion valve is configured to receive condensed liquid refrigerant and to expand the refrigerant. A cooling circuit in fluid communication with the main refrigerant line includes an expansion device configured to receive a portion of condensed liquid refrigerant from the main refrigerant circuit and to expand the portion of condensed liquid refrigerant. A heat sink is configured to receive the expanded portion of refrigerant from the expansion device. Power electronics are coupled to the heat sink such that the portion of expanded refrigerant from the expansion device passes through the heat sink and cools the power electronics. 1. A heat pump comprising: a compressor configured to compress a refrigerant,', 'an indoor heat exchanger,', 'an outdoor heat exchanger,', 'a biflow expansion valve configured to receive condensed liquid refrigerant and to expand the refrigerant,', 'a reversing valve movable between a first position that directs refrigerant from the compressor sequentially to the outdoor heat exchanger, the biflow expansion valve, and the indoor heat exchanger in a cooling mode, and a second position that directs compressed refrigerant from the compressor sequentially to the indoor heat exchanger, the biflow expansion valve, and the outdoor heat exchanger in a heating mode; and, 'a main refrigerant circuit including'} an expansion device configured to receive a portion of condensed liquid refrigerant from the main refrigerant circuit and to expand the portion of condensed liquid refrigerant,', 'a heat sink configured to receive the expanded portion of refrigerant from the expansion device, and', 'power electronics coupled to the heat sink, the portion of expanded refrigerant from the expansion device passing through the heat sink and cooling the power electronics., 'a cooling circuit in fluid ...

METHOD FOR CONTROLLING REFRIGERATING SYSTEM USING NON-AZEOTROPIC MIXED REFRIGERANT

A method for controlling a refrigerating system using a non-azeotropic mixed refrigerant is provided. The refrigerating system may include a first evaporator configured to supply cold air to a freezer compartment located upstream and a second evaporator configured to supply cold air to a refrigerating compartment located downstream, based on a flow direction of the non-azeotropic mixed refrigerant. The method may include a first operation comprising operating a compressor, a freezer compartment fan to blow air to the first evaporator, and a refrigerating compartment fan to blow air to the second evaporator; a second operation comprising when the freezer compartment reaches a target temperature or the refrigerating compartment reaches a target temperature, continuously operating the compressor, and stopping the freezer compartment fan or the refrigerating compartment fan corresponding to one of the freezer compartment or the refrigerating compartment that reaches the target temperature; and a third operation comprising when both the freezer compartment and the refrigerating compartment reach the target temperatures, turning off both of the refrigerating compartment fan and the freezer compartment fan and stopping the compressor. 1. A method for controlling a refrigerating apparatus including a non-azeotropic mixed refrigerant , the refrigerating apparatus including a first evaporator to supply cold air to a freezer compartment and a second evaporator to supply cold air to a refrigerating compartment , the first evaporator disposed upstream of the second evaporator , the method comprising:when a first operation is operated, operating a compressor, operating a freezer compartment fan to blow air to the first evaporator, and operating a refrigerating compartment fan to blow air to the second evaporator, such that the freezer compartment reaches a target temperature or the refrigerating compartment reaches a target temperature;when a second operation is operated, in ...

COOLING SYSTEM WITH OIL RETURN TO OIL RESERVOIR

A cooling system drains oil from low side heat exchangers to vessels and then uses compressed refrigerant to push the oil in the vessels back towards a compressor. Generally, the cooling system operates any number and combination of three different modes of operation: a normal mode, an oil drain mode, and an oil return mode. During the normal mode, a primary refrigerant is cycled to cool one or more secondary refrigerants. As the primary refrigerant is cycled, oil from a compressor may mix with the primary refrigerant and become stuck in a low side heat exchanger. During the oil drain mode, the oil in the low side heat exchanger is allowed to drain into a vessel. During the oil return mode, compressed refrigerant is directed to the vessel to push the oil in the vessel back towards a compressor. 1. A system comprising:a flash tank configured to store a primary refrigerant;a first low side heat exchanger;an accumulator;a first compressor;a second compressor;an oil reservoir;a first valve;a second valve; and the first and second valves are closed;', 'the third valve is open;', 'the first low side heat exchanger uses primary refrigerant from the flash tank to cool a secondary refrigerant;', 'the accumulator receives primary refrigerant from the first low side heat exchanger;', 'the first compressor compresses primary refrigerant from the accumulator; and', 'the second compressor compresses primary refrigerant from the first compressor,, 'a third valve, during a first mode of operationand the first valve is open and directs primary refrigerant from the first low side heat exchanger and an oil from the first low side heat exchanger to a vessel;', 'the second valve is closed; and', 'the third valve is open and directs primary refrigerant from the vessel to the accumulator., 'during a second mode of operation2. The system of claim 1 , further comprising:a first sensor configured to detect a temperature of the primary refrigerant in the first low side heat exchanger; anda ...

Dual suction compressor with rapid suction port switching mechanism for matching appliance compartment thermal loads with cooling capacity

An appliance employing a coolant system that includes a compressor having a housing, a cooling capacity, and operably connected to typically two evaporators for regulating a temperature of the first compartment and a temperature of the second compartment; a shared coolant fluid connection system; a coolant fluid spaced within the shared coolant fluid connection system; and a switching mechanism operably connected to a first fluid conduit that provides shared coolant fluid to the compressor at a first pressure level and a second fluid conduit that provides shared coolant fluid to the compressor at a second pressure level where the second pressure level is less than the first pressure level wherein the switching mechanism is capable of regulating and switching shared coolant flow to the compressor from the first fluid conduit and the second fluid conduit.

Refrigerant circuit and air conditioning device

In a refrigerant circuit of an air conditioning device 10 , an upper heat source side heat exchanger 2 a having a large heat load and a lower heat source side heat exchanger 2 b having a small heat load are connected in parallel between an expansion device 15 and a suction side of a compressor 4 . Additionally, the refrigerant circuit of the air conditioning device 10 is provided with a branch circuit 9 configured to distribute refrigerant to each of the upper heat source side heat exchanger 2 a and the lower heat source side heat exchanger 2 b , and the branch circuit 9 is configured to supply the upper heat source side heat exchanger 2 a with refrigerant of lower quality than that of the refrigerant supplied to the lower heat source side heat exchanger 2 b.

SYSTEM FOR CONTROLLING A REFRIGERATION SYSTEM WITH A PARALLEL COMPRESSOR

A method for a refrigeration system includes determining whether a parallel compressor of the refrigeration system is operational, directing refrigerant discharged from a first compressor of the refrigeration system to a second compressor of the refrigeration system if the parallel compressor is not operational, and directing the refrigerant discharged from the first compressor to the parallel compressor if the parallel compressor is operational. The first compressor of the refrigeration system is operable to compress refrigerant discharged from a first refrigeration case, the second compressor is operable to compress refrigerant discharged from a second refrigeration case, and the parallel compressor, when operational, is operable to provide parallel compression for the second compressor. 1. A refrigeration system operable to circulate refrigerant through the refrigeration system in order to provide refrigeration , the refrigeration system comprising:a first compressor operable to compress refrigerant discharged from a first refrigeration case;a second compressor operable to compress refrigerant discharged from a second refrigeration case;a parallel compressor that, when operational, is operable to provide parallel compression for the second compressor; and determine whether the parallel compressor is operational;', 'direct the refrigerant discharged from the first compressor to the second compressor if the parallel compressor is not operational; and', 'direct the refrigerant discharged from the first compressor to the parallel compressor if the parallel compressor is operational., 'a controller operable to2. The refrigeration system of claim 1 , wherein the parallel compressor is not operational when an ambient temperature of the environment surrounding the refrigeration system is below a temperature threshold.3. The refrigeration system of claim 1 , wherein the parallel compressor is not operational when a load of the refrigeration system is below a load ...

EVAPORATOR LIQUID PREHEATER FOR REDUCING REFRIGERANT CHARGE

A system and method for reducing the refrigerant charge in a refrigeration system by preheating the liquid refrigerant before it is introduced to the evaporator inlet. When refrigerant liquid is introduced to the evaporator inlet, a portion of the refrigerant liquid vaporizes. This refrigerant vapor displaces refrigerant liquid at the inlet of the evaporator. As more refrigerant vapor is introduced, the amount of liquid inside the evaporator is reduced. A heat exchanger is placed before the liquid refrigerant inlet of the evaporator to generate more vapor when the refrigerant enters the evaporator. 19.-. (canceled)10. A method for reducing the refrigerant charge of a refrigeration system comprising preheating liquid refrigerant prior to introduction of the liquid refrigerant to an evaporator of said refrigeration system.119. The method according to claim , further comprising measuring a property of said refrigerant at an inlet of said evaporator and adjusting an amount of said preheating based on said measured property.12. The method according to claim 10 , wherein said pre-heating the refrigerant prior to introduction of the refrigerant to the evaporator inlet reduces the refrigerant charge per ton of refrigeration capacity by 10% or greater.13. The method according to claim 12 , wherein said pre-heating the refrigerant prior to introduction of the refrigerant to the evaporator inlet reduces the refrigerant charge per ton of refrigeration capacity by 30% or greater.14. The method according to claim 10 , comprising heating said liquid refrigerant to convert 10% to 30% refrigerant vapor.15. The method according to claim 10 , wherein said preheating liquid refrigerant step is carried out in a preheater heat exchanger located in a refrigerant flow path upstream of the evaporator inlet claim 10 , using warmed refrigerant liquid from a refrigerant condenser in said refrigerant flow path that is located in said refrigerant flow path upstream of said preheater heat ...

SYSTEMS AND METHODS FOR LOW LOAD COMPRESSOR OPERATIONS

The present application provides a low load operating system for a refrigeration system having a compressor, a condenser, an expansion valve, and an evaporator. The low load operating system may include a hot gas bypass line extending from a discharge side of the compressor to a suction side of the compressor and a desuperheat line extending from upstream of the expansion valve to the suction side of the compressor. 1. A low load operating system for a refrigeration system having a compressor , a condenser , an expansion valve , and an evaporator , comprising:a hot gas bypass line;a desuperheat line;a controller;an oil return line coupled to the refrigeration system via the controller; determine existence of a low load condition; and', 'responsive to a determination that the low load condition exists, open a hot gas bypass line valve and a desuperheat line valve to induce a flow of a refrigerant therethrough to avoid frequent compressor stops and starts and maintain proper superheat conditions on the compressor., 'wherein the controller is configured to2. The low load operating system of claim 1 , wherein the oil return line is disposed downstream the hot gas bypass line and downstream of an oil separator and upstream of the condenser and further coupled upstream the evaporator and downstream a receiver.3. The low load operating system of claim 1 , wherein the hot gas bypass line extends from a discharge side of the compressor to a suction side of the compressor.4. The low load operating system of claim 1 , wherein the desuperheat line bypasses the evaporator via extension from upstream of the expansion valve to a suction side of the compressor.5. The low load operating system of claim 1 , wherein the hot gas bypass line comprises a hot gas bypass line solenoid valve.6. The low load operating system of claim 1 , wherein the hot gas bypass line comprises a hot gas bypass line flow valve.7. The low load operating system of claim 1 , wherein the desuperheat line ...

Cooling Circuit, Cold Drying Installation and Method for Controlling a Cooling Circuit

A cooling circuit is equipped with a coolant, a compressor, a condenser and evaporator expansion valve combinations, whereby the outlets of the evaporators are connected to a collection pipe connected to the compressor. The cooling circuit comprises a control unit connected to a temperature sensor and a pressure sensor affixed in the collection pipe and connected to the expansion valves for the control of them. The control unit is provided with an algorithm for controlling the expansion valves on the basis of the temperature sensor and pressure sensor to control the superheating in the collection pipe. 116-. (canceled)17. A cooling circuit including a coolant , a compressor , a condenser and evaporator expansion valve combinations in parallel in the cooling circuit wherein the evaporators form a part of separate heat exchangers and wherein the outlets of the respective evaporators are connected to a collection pipe connected to an inlet of the compressor , wherein the cooling circuit comprises a control unit connected to at least one temperature sensor and at least one pressure sensor affixed in the collection pipe and connected to the expansion valves for the control of them; wherein the control unit is provided with an algorithm for controlling the expansion valves on the basis of measurement signals originating from the temperature sensor and pressure sensor to control the superheating in the collection pipe , wherein the evaporators form the primary section of separate heat exchangers such that each comprise a secondary section; and the control unit is connected to measurement means for determining the lowest gas temperature of the secondary sections of each of the heat exchangers and the control unit comprises an algorithm for controlling the lowest gas temperatures of the separate heat exchangers according to the same target value , by the separate control of the respective expansion valves of each respective heat exchanger.18. The cooling circuit according to ...

Vehicular air-conditioning device

There is provided a vehicular air-conditioning device capable of reducing frost formation on an outdoor heat exchanger during vehicle running after disconnection from an external power source and extending a period during which a heating operation can be performed with high efficiency. A battery 55 is capable of being charged from an external power source. A controller 32 causes an outdoor heat exchanger 7 to absorb heat to thereby execute a heating operation to heat a vehicle interior. The controller 32 is capable of executing air preconditioning to preliminarily heat the vehicle interior before boarding. When the air preconditioning is executed in a state in which the battery 55 is connected to the external power source, the controller 32 heats the vehicle interior without using the outdoor heat exchanger 7 , and changes a target temperature for heating control in the air preconditioning in the direction of increasing from a reference value of the target temperature.

Air Conditioning System for Use in Vehicle

An air conditioning system for use in a vehicle includes at least one compressor, a condenser disposed downstream of the at least one compressor and a plurality of evaporators disposed downstream of the condenser with first and second evaporators fluidly coupled to each other in parallel. The at least one compressor, the condenser, and the plurality of evaporators are fluidly connected by refrigerant lines to form a refrigerant circuit. The air conditioning system also includes a plurality of shut-off valves, with one shut-off valve installed at a refrigerant inlet and another shut-off valve installed at a refrigerant outlet of the first evaporator. The shut-off valves are controlled to prevent undesired collection of refrigerant in the first evaporator.