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 form the flash tank to cool a second space proximate the second load; compress the refrigerant from the first load during a first mode of operation; and', 'compress a flash gas from the flash tank during a second mode of operation;, 'a first compressor configured toa second compressor configured to compress a mixture of the refrigerant from the first load 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 , wherein the first valve is further configured to direct the refrigerant ...

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 ...

Refrigerator

A refrigerator includes a compressor configured to compress a refrigerant, a condenser configured to condense the refrigerant compressed in the compressor, an expander configured to depressurize the refrigerant condensed in the condenser, a plurality of evaporators configured to evaporate the refrigerant depressurized in the expander, a first valve configured to be operated to introduce the refrigerant into at least one of the plurality of evaporators, a hot gas valve device disposed at an inlet side of the first valve and configured to guide the refrigerant passed through the compressor or the condenser to the plurality of evaporators, and a hot gas path configured to extend from the hot gas valve device to the plurality of evaporators.

VALVE, EXPANSION VALVE, AND STEPPING CONTROL METHOD THEREOF

Disclosed is a valve, an expansion valve and their stepping control methods. The valve includes a valve body, a limiting unit, and a heating unit installed in the limiting unit. The valve body has an actuation space, and a first through hole and a second through hole communicated with the actuation space, and the actuation space further contains a valve seat disposed between the first and second through holes, and the limiting unit is installed in the actuation space, and a variable spacing is defined between the limiting unit and the valve seat. When the variable spacing is reduced, the heating unit heats up the interior of the limiting unit for heating to prevent ice buildups, so as to maintain a flowing state of the variable spacing. 1. An expansion valve , comprising:a valve body, is hollow and has an actuation space and a containing space, a first through hole and a second through hole are respectively communicated with the actuation space being defined on the valve body, and a valve seat being arranged in the actuation space and between the first through hole and the second through hole;a driving unit, installed in the containing space;a transmission unit, installed in the containing space and transmissively connected to the driving unit;a limiting unit, installed in the actuation space and driven by the transmission unit;a control unit, configured to control the driving unit, and the transmission unit is driven by the driving unit to shift the limiting unit in the actuation space relatively toward the valve seat; anda heating unit, installed in the limiting unit.2. The expansion valve of claim 1 , wherein the containing space is divided into a first space and a second space claim 1 , the driving unit is disposed in the first space claim 1 , and the transmission unit is disposed in the second space.3. The expansion valve of claim 2 , further comprising a latching structure installed between the first space and the second space claim 2 , and the driving unit is ...

AIR-CONDITIONER

An air-conditioner includes: a refrigerant circuit through which a refrigerant flows, the refrigerant circuit being formed of a compressor, a switching valve, a first heat exchanger, an expansion valve, and a second heat exchanger connected to one another by a first pipe; a heat-transfer medium circuit through which a heat-transfer medium flows, the heat-transfer medium circuit being formed of a pump, the first heat exchanger, and a third heat exchanger connected to one another by a second pipe; and control device that controls the compressor and the pump. In an operation of the air-conditioner performed before entering a defrosting operation, the control device increases a frequency of the compressor, as compared to the frequency of the compressor in a heating operation, and reduces a rotational speed of the pump, as compared to the rotational speed of the pump in the heating operation. 1. An air-conditioner , comprising:a refrigerant circuit through which a refrigerant flows, the refrigerant circuit being formed of a compressor, a switching valve, a first heat exchanger, an expansion valve, and a second heat exchanger connected to one another by a first pipe;a heat-transfer medium circuit through which a heat-transfer medium flows, the heat-transfer medium circuit being formed of a pump, the first heat exchanger, and a third heat exchanger connected to one another by a second pipe; anda control device that controls the compressor and the pump, whereinin an operation of the air-conditioner performed before entering a defrosting operation, the control device increases a frequency of the compressor, as compared to the frequency of the compressor in a heating operation, and reduces a rotational speed of the pump, as compared to the rotational speed of the pump in the heating operation, in the operation of the air-conditioner before entering the defrosting operation, the control device increases the frequency of the compressor, as compared to the frequency of the ...

ABSORPTION HEAT PUMP AND METHOD FOR OPERATING AN ABSORPTION HEAT PUMP

An absorption heat pump having a generator, a heat source to heat the generator to drive coolant vapor out of solution, a condenser for cooling the coolant vapor and an expansion valve that expand the coolant fluid as well as an evaporator for at least partial evaporation of the expanded coolant fluid against a medium which is connected to at least one absorber which absorbs the expanded coolant fluid. A hot gas line which branches off from a line for coolant vapor upstream of the condenser and is fluid-connected to the evaporator such that it bypasses the condenser and the expansion valve, a defrosting valve being provided in the hot gas line, by means of which the flow of coolant vapor through the hot gas line can be controlled. The absorption heat pump is operated in a cyclic circulation process. 1. An absorption heat pump , comprising:a generator accommodating a coolant solution,a heat source positioned to heat the generator to drive coolant vapor out of the coolant solution,an outlet located on an upper region of the generator to remove coolant vapor from the generator,a line for coolant vapor which links the outlet in a fluid connection to a condenser for cooling a consumer and for at least partial condensation of the coolant vapor which results therefrom to obtain a coolant fluid,an expansion valve for expanding the coolant fluid and which is connected on and inlet side to the condenser via a line for coolant fluid and on an output side via a line to an evaporator for at least partial evaporation of the expanded coolant fluid relative to a medium which is connected on the output side via an absorber supply line for coolant to at least one absorber for absorbing the expanded coolant fluid by a coolant-poor solution, the absorber being connected with the absorber supply line for coolant-poor solution to the generator, by means of which the coolant-poor solution can be withdrawn from a lower region of the generator to produce a coolant-rich solution which is ...

CONTROLLER OF AIR CONDITIONING APPARATUS, OUTDOOR UNIT, RELAY UNIT, HEAT SOURCE UNIT, AND AIR CONDITIONING APPARATUS

An air conditioning apparatus includes: a second heat exchanger; a plurality of third heat exchangers; and a plurality of flow rate control valves. In a defrosting mode, when a heat exchanger that is not being requested to perform air conditioning includes a first device having a set temperature lower than or equal to a current room temperature and a second device which is set so as not to perform air conditioning, a controller is configured to control a first flow rate control valve corresponding to the first device and a second flow rate control valve corresponding to the second device such that a degree of opening of the first flow rate control valve is higher than or equal to a degree of opening of the second flow rate control valve. 1. A controller that controls an air conditioning apparatus configured to operate in operation modes including a heating mode and a defrosting mode , the air conditioning apparatus comprising:a compressor configured to compress a first heat medium;a first heat exchanger configured to exchange heat between the first heat medium and outdoor air;a second heat exchanger configured to exchange heat between the first heat medium and a second heat medium;a plurality of third heat exchangers each configured to exchange heat between the second heat medium and indoor air;a plurality of flow rate control valves each configured to control a flow rate of the second heat medium flowing through a corresponding one of the plurality of third heat exchangers; anda pump configured to circulate the second heat medium between the plurality of third heat exchangers and the second heat exchanger, whereinin the heating mode, the controller is configured to open the flow rate control valve corresponding to a heat exchanger that is being requested to perform air conditioning of the plurality of third heat exchangers, and to close the flow rate control valve corresponding to a heat exchanger that is not being requested to perform air conditioning of the ...

EVAPORATOR AND REFRIGERATOR HAVING SAME

An evaporator includes: an evaporator case that defines a food storage space therein; a cooling tube located at the evaporator case and filled with refrigerant; a foil heater attached to at least one surface of the evaporator case and configured to contact the evaporator case and to generate heat such that heat for defrosting is transferred to the evaporator case. A defrosting time is reduced in comparison to that of conventional natural defrosting, such that the freshness of food can be maintained, and the cooling efficiency, having been reduced by frost, is increased such that power consumption can be reduced. The foil heater is attached to a conventional roll-bond type evaporator case, and the present invention has an advantageous effect of facilitating the maintenance of the foil heater because of a structure in which the foil heater is attached to the evaporator case. 1. An evaporator comprising:an evaporator case having an empty box shape in which both sides are open and forming a storage space for food therein;a cooling tube formed in a predetermined pattern on the evaporator case and filled with a refrigerant for cooling; anda foil heater attached to be in surface-contact with at least one surface of the evaporator case and generating heat when power is applied thereto such that heat for defrosting is transferred to the evaporator case.2. The evaporator of claim 1 , whereinthe foil heater is attached to an outer surface of the evaporator case.3. The evaporator of claim 2 , whereinthe evaporator case is formed by bending two coupled case sheets to have a quadrangular box shape in which a lower surface portion, side surface portions, and an upper surface portion are provided and both sides thereof are open, andthe foil heater is attached to be in surface-contact with at least a portion of each of the lower surface portion, the side surface portions, and the upper surface portion to surround the evaporator case.4. The evaporator of claim 3 , whereinthe foil ...

AIR-CONDITIONING APPARATUS

When a controller performs a defrosting operation in which frost on an outdoor heat exchanger is caused to be melted, the controller is configured to perform a first defrosting control in which a switching state of a switching device is set to a first state, after the controller performs the first defrosting control, perform a second defrosting control in which the switching state of the switching device is set to a second state, and after the controller performs the second defrosting control, perform a third defrosting control in which the switching state of the switching device is set to the first state. 1. An air-conditioning apparatus , comprising:a compressor;an indoor heat exchanger used as a condenser during a heating operation;an outdoor heat exchanger including a lower heat exchanger and an upper heat exchanger provided at top of the lower heat exchanger, the outdoor heat exchanger being used as an evaporator during the heating operation;an outdoor fan configured to supply air to the outdoor heat exchanger;a pressure reducing device provided downstream of the indoor heat exchanger in a direction in which refrigerant flows during the heating operation, the pressure reducing device being provided upstream of the outdoor heat exchanger in the direction in which refrigerant flows during the heating operation;a switching device configured to switch a switching state to one of a first state and a second state, a discharge port of the compressor and the lower heat exchanger being connected to each other in the first state, the discharge port of the compressor and the upper heat exchanger being connected to each other in the second state; anda controller configured to control the switching state of the switching device,when the controller performs a defrosting operation in which frost on the outdoor heat exchanger is caused to be melted, the controller being configured tooperate the outdoor fan,perform a first defrosting control in which the switching state of the ...

REFRIGERATION CYCLE APPARATUS

A refrigeration cycle apparatus includes: a first four-way valve having first to fourth ports; a second four-way valve and a third four-way valve each having fifth to eighth ports; a compressor; a discharge pipe connecting a discharge port of the compressor and the first port; a suction pipe connecting a suction port of the compressor and the second port; a first high pressure pipe connecting the discharge pipe and the fifth ports; a second high pressure pipe connecting the third port and the first high pressure pipe; a first valve provided at the first high pressure pipe; a second valve provided at the second high pressure pipe; a low pressure pipe connecting the suction pipe and the sixth ports; a first outdoor heat exchanger connected with the seventh port of the second four-way valve; a second outdoor heat exchanger connected with the seventh port of the third four-way valve; and an indoor heat exchanger connected with the fourth port. 1. A refrigeration cycle apparatus comprising:a first four-way valve having a first port, a second port, a third port, and a fourth port;a second four-way valve and a third four-way valve each having a fifth port, a sixth port, a seventh port, and an eighth port, the eighth port being closed;a compressor having a suction port from which refrigerant is sucked into the compressor and a discharge port from which the refrigerant is discharged from the compressor;a discharge pipe connecting the discharge port and the first port;a suction pipe connecting the suction port and the second port;a first high pressure pipe connecting the discharge pipe and the fifth port of the second four-way valve and the fifth port of the third four-way valve;a second high pressure pipe connecting the third port and a bifurcation provided at the first high pressure pipe;a first valve provided at part of the first high pressure pipe that is located between the discharge pipe and the bifurcation, the first valve being an electronic expansion valve;a second ...

Combined cascade refrigeration cycle apparatus

According to one embodiment, an apparatus includes a housing, two high-temperature-side refrigeration circuits and two low-temperature-side refrigeration circuits. Each of the high-temperature-side refrigeration circuits is configured to exchange heat with both of the two low-temperature-side refrigeration circuits by cascade heat exchangers. A hot-water pipe letting water or hot water through water-refrigerant heat exchangers of the high-temperature-side refrigeration circuits is provided. When the low-temperature-side refrigeration circuit conducts a defrosting operation of the evaporator, the low-temperature-side refrigeration circuits are controlled in such a way that the low-temperature-side refrigerant circuit releases heat in the cascade heat exchanger.

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.

OUTDOOR UNIT FOR A HEAT PUMP

An outdoor unit for a heat pump includes a refrigerant circuit, the outdoor unit including a compressor, a discharge pipe of the refrigerant circuit connected to a discharge side of the compressor, a bottom plate, the bottom plate having a base and an outer flange protruding upward from an outer edge of the base, a heat source heat exchanger supported on the bottom plate, a liquid refrigerant pipe of the refrigerant circuit connected to the heat source heat exchanger, and a defrosting bypass pipe connected at one end to the discharge pipe and at the opposite end to the liquid refrigerant pipe, the defrosting bypass pipe being arranged between an inner side of the flange and an outer side of the heat source heat exchanger.

REFRIGERATION CYCLE APPARATUS

The refrigeration cycle apparatus includes a refrigerant circuit, a controller to control the refrigerant circuit, a bypass flow path, and a flow control valve. The bypass flow path communicates between the discharge side of the compressor and the first outdoor heat exchanger or between the discharge side of the compressor and the second outdoor heat exchanger. The flow control valve is provided to the bypass flow path. The refrigerant circuit is configured to be able to perform a heating defrosting simultaneous operation. The heating defrosting simultaneous operation is an operation of supplying part of the refrigerant discharged from the compressor to one of the first outdoor heat exchanger and the second outdoor heat exchanger via the bypass flow path, causing the other of the first outdoor heat exchanger and the second outdoor heat exchanger to serve as an evaporator, and causing the indoor heat exchanger to serve as a condenser. 1. A refrigeration cycle apparatus comprising: a compressor,', 'an indoor heat exchanger,', 'a first outdoor heat exchanger, and', 'a second outdoor heat exchanger,, 'a refrigerant circuit including'}the refrigerant circuit circulating refrigerant; anda controller configured to control the refrigerant circuit,the refrigerant circuit further comprisinga bypass flow path communicating between a discharge side of the compressor and the first outdoor heat exchanger or between the discharge side of the compressor and the second outdoor heat exchanger, anda flow control valve provided at the bypass flow path,the indoor heat exchanger being configured to exchange heat between the refrigerant and a heating target, supplying part of the refrigerant discharged from the compressor to one of the first outdoor heat exchanger and the second outdoor heat exchanger via the bypass flow path,', 'causing an other of the first outdoor heat exchanger and the second outdoor heat exchanger to serve as an evaporator, and', 'causing the indoor heat exchanger to ...

Vehicle air conditioner

A heat pump device includes an air conditioning control device configured to switch the heat pump device among a plurality of operation modes including an air-heating operation mode in which an indoor heat exchanger serves as a radiator and an outdoor heat exchanger serves as a heat absorber, and an air-cooling operation mode in which the indoor heat exchanger serves as a heat absorber and the outdoor heat exchanger serves as a radiator. The air conditioning control device switch a refrigerant pipe such that refrigerant is, in the air-cooling operation mode, supplied to part of the outdoor heat exchanger serving as a refrigerant inlet in the air-heating operation mode.

METHOD AND SYSTEM FOR OPERATING A REFRIGERATION SYSTEM

A refrigeration system includes a refrigerated cavity, a first compression system, and a second compression system. The refrigeration system further includes a controller configured to operate the refrigeration system in a first mode in which the first compression system and the second compression system operate to cool the refrigerated cavity. The refrigeration system is further configured to selectively operate the refrigeration system in a second mode in which a refrigerant discharged from the second compressor is routed through the first evaporator to defrost the first evaporator. 1. A refrigeration system comprising:a refrigerated cavity;a first compression system comprising a first compressor, and a first evaporator;a second compression system comprising a second compressor; and operate the refrigeration system in a first mode in which at least one of the first compression system or the second compression system operates to cool the refrigerated cavity to a temperature;', 'selectively operate the refrigeration system in a second mode in which the second compression system operates to discharge a refrigerant from the second compressor, wherein the refrigerant is routed through the first evaporator to defrost the first evaporator; and', 'switch the refrigeration system between the first mode and the second mode based upon a parameter., 'a controller configured to2. The refrigeration system of claim 1 , wherein the second compression system further comprises a cold wall system claim 1 , and the controller is configured to operate the second compression system to defrost the first evaporator while storing cold energy in the cold wall system during the second mode.3. The refrigeration system of claim 2 , wherein the cold wall system is configured to cool the refrigerated cavity to the temperature during the first mode.4. The refrigeration system of claim 2 , wherein the cold wall system includes at least one eutectic plate.5. The refrigeration system of claim 2 , ...

METHOD FOR TERMINATING DEFROSTING OF AN EVAPORATOR BY USE OF AIR TEMPERATURE MEASUREMENTS

A method for terminating defrosting of an evaporator () is disclosed. The evaporator () is part of a vapour compression system (). The vapour compression system () further comprises a compressor unit (), a heat rejecting heat exchanger (), and an expansion device (). The compressor unit (), the heat rejecting heat exchanger (), the expansion device () and the evaporator () are arranged in a refrigerant path, and an air flow is flowing across the evaporator (). When ice is accumulated on the evaporator (), the vapour compression system () operates in a defrosting mode. At least one temperature sensor () monitors a temperature T, of air leaving the evaporator (). A rate of change of Tis monitored and defrosting is terminated when the rate of change of the temperature, T, approaches zero. 1. A method for terminating defrosting of an evaporator , the evaporator being part of a vapour compression system , the vapour compression system further comprising a compressor unit , a heat rejecting heat exchanger , and an expansion device , the compressor unit , the heat rejecting heat exchanger , the expansion device and the evaporator being arranged in a refrigerant path , and an air flow flowing across the evaporator , the method comprising the steps of:operating the vapour compression system in a defrosting mode,{'sub': 'air', 'monitoring, by at least one temperature sensor, at least one temperature, T, of air leaving the evaporator,'}{'sub': 'air', 'monitoring a rate of change of the temperature, T, and'}{'sub': 'air', 'terminating defrosting when the rate of change of the temperature, T, approaches zero.'}2. The method according to claim 1 , wherein the step of terminating defrosting is performed when the rate of change of the temperature claim 1 , T claim 1 , has been smaller than a predetermined threshold value for a predetermined time.3. The method according to claim 1 , wherein during the defrosting mode a hot gas from the compressor unit is supplied to refrigerant ...

COOLING SYSTEM

An apparatus includes a high side heat exchanger, a subcooler heat exchanger, a flash tank, a load, and a compressor. The high side heat exchanger removes heat from a refrigerant. The subcooler heat exchanger receives the refrigerant. The flash tank stores the refrigerant. During a first mode of operation, the load uses the refrigerant to cool a space proximate the load and the compressor compresses the refrigerant. During a second mode of operation, the subcooler heat exchanger receives the refrigerant from the flash tank, transfers heat from the refrigerant from the high side heat exchanger to the refrigerant from the flash tank and directs the refrigerant from the flash tank to the compressor. During the second mode of operation, the compressor compresses the refrigerant from the subcooler heat exchanger and directs the compressed refrigerant to the load to defrost the load. 1. An apparatus comprising:a high side heat exchanger configured to remove heat from a refrigerant;a subcooler heat exchanger configured to receive the refrigerant from the high side heat exchanger;a flash tank configured to store the refrigerant from the subcooler heat exchanger;a first load; anda first compressor; the first load configured to use the refrigerant from the flash tank to cool a first space proximate the first load;', 'the first compressor configured to compress the refrigerant from the first load; and, 'during a first mode of operation [ receive the refrigerant from the flash tank;', 'transfer heat from the refrigerant from the high side heat exchanger to the refrigerant from the flash tank; and', 'direct the refrigerant from the flash tank to the first compressor;, 'the subcooler heat exchanger configured to, compress the refrigerant from the subcooler heat exchanger; and', 'direct the compressed refrigerant from the subcooler heat exchanger to the first load to defrost the first load., 'the first compressor configured to], 'during a second mode of operation2. The apparatus ...

REFRIGERATING CYCLE APPARATUS

A refrigerating cycle apparatus includes: a compressor that compresses and discharges refrigerant; a radiator that makes the refrigerant discharged out of the compressor to radiate heat; a pressure reducing device that decompresses the refrigerant flowing out of the radiator; an evaporator that evaporates the refrigerant decompressed by the pressure reducing device; and a decompression control part that controls operation of the pressure reducing device. The decompression control part controls the operation of the pressure reducing device in a manner that a physical quantity which has correlation with a pressure of the refrigerant in the evaporator approaches a predetermined defrosting standard value when a time-priority defrosting mode is set. 1. A refrigerating cycle apparatus comprising:a compressor that compresses and discharges refrigerant;a radiator that makes the refrigerant discharged out of the compressor to radiate heat;a pressure reducing device that decompresses the refrigerant flowing out of the radiator;an evaporator that evaporates the refrigerant decompressed by the pressure reducing device; anda decompression control part that controls operation of the pressure reducing device, whereinthe decompression control part controls the operation of the pressure reducing device in a manner that a physical quantity which has correlation with a pressure of the refrigerant in the evaporator approaches a predetermined defrosting standard value when a time-priority defrosting mode is set to shorten a period of time required for defrosting the evaporator.2. The refrigerating cycle apparatus according to claim 1 , whereinthe physical quantity which has correlation with the pressure of the refrigerant in the evaporator is a pressure of the refrigerant at an inlet side of the compressor, andthe defrosting standard value is a predetermined refrigerant pressure.3. The refrigerating cycle apparatus according to claim 1 , whereinthe decompression control part controls ...

AIR CONDITIONER

An outdoor unit control unit has a defrosting operation condition table that defines an activation rotational speed Cr in accordance with a total sum of rated capacity of indoor units to and a refrigerant pipe length that is lengths of a liquid pipe or a gas pipe . The outdoor unit control unit uses the total sum of the rated capacity of the indoor units to and refers to the defrosting operation condition table , so as to determine the activation rotational speed Cr. Then, the outdoor unit control unit activates a compressor at the determined activation rotational speed Cr when starting a defrosting operation, maintains this activation rotational speed Cr for a predetermined time (one minute) from the start of the defrosting operation, and drives the compressor 1. An air conditioner comprising:at least one outdoor unit having a compressor, a flow passage switching unit, an outdoor heat exchanger, and an outdoor unit controller;at least one indoor unit having an indoor heat exchanger; andat least one liquid pipe and at least one gas pipe for coupling the outdoor unit and the indoor unit, whereinthe outdoor unit controller drives the compressor at an activation rotational speed as a predetermined value for a predetermined time from a start of a defrosting operation, andplural values are defined as the activation rotational speed in accordance with a capacity ratio that is a value obtained by dividing a total sum of rated capacity of the indoor unit by a total sum of rated capacity of the outdoor unit.2. The air conditioner according to claim 1 , whereinin a case where the capacity ratio is lower than a predetermined threshold capacity ratio, the activation rotational speed is defined to be low in comparison with a case where the capacity ratio is equal to or more than the predetermined threshold capacity ratio.3. An air conditioner comprising:at least one outdoor unit having a compressor, a flow passage switching unit, an outdoor heat exchanger, and an outdoor unit ...

Apparatus for and operation of a liquid flow circuit containing a chemical additive

A liquid flow system includes a dosing device for introduction of a chemical additive into a liquid flow circuit, the dosing device including an inlet port in fluid communication with the liquid flow circuit and a container of chemical additive secured or adapted to be secured to the inlet port, the container including a radio frequency identification (RFID) device which stores data of a parameter related to the correct operation of the liquid flow circuit, and the system including a communication device to receive data from the container whereby the liquid flow system is responsive to data received by the communication device.

Precooler-based transcritical co2 heat pump system and control method of waterway two-way valve thereof

The present disclosures discloses a precooler-based transcritical CO2 heat pump system and a control method of a waterway two-way valve thereof, in which a transcritical CO2 heat pump system is assisted by a precooler system. A circulating waterway is divided into two parts in the system through a three-way diversion valve and a three-way confluence valve and is connected to a waterway bypass valve through a waterway two-way regulating valve. An ambient temperature sensor, an evaporation fin temperature sensor and an evaporation pressure sensor are provided, and a programmable logic controller is used as a core for acquisition, operation and control.

DEFROST SYSTEM FOR REFRIGERATION APPARATUS, AND COOLING UNIT

A defrost system includes: a cooling device in a freezer, and includes a casing, a heat exchanger pipe with a difference in elevation in the casing, and a drain receiver unit below the heat exchanger pipe; a refrigerating device to cool and liquefy COrefrigerant; and a refrigerant circuit for permitting the cooled and liquefied COrefrigerant to circulate to the heat exchanger pipe. The defrost system includes a bypass pipe of the heat exchanger pipe to form a COcirculation path; an on-off valve in the heat exchanger pipe to be closed during defrosting so that the COcirculation path is a closed circuit; a pressure adjusting unit for adjusting pressure of the COrefrigerant during defrosting; and a brine circuit as a first heating medium, in which the defrost system permits the COrefrigerant to naturally circulate in the closed circuit during defrosting by a thermosiphon effect. 1. A defrost system for a refrigeration apparatus including: a cooling device which is disposed in a freezer , and includes a casing , a heat exchanger pipe with a difference in elevation disposed in the casing , and a drain receiver unit disposed below the heat exchanger pipe; a refrigerating device configured to cool and liquefy COrefrigerant; and a refrigerant circuit for permitting the COrefrigerant cooled and liquefied in the refrigerating device to circulate to the heat exchanger pipe , the defrost system comprising:{'sub': '2', 'a bypass pipe connected between an inlet path and an outlet path of the heat exchanger pipe to form a COcirculation path including the heat exchanger pipe;'}{'sub': '2', 'an on-off valve disposed in each of the inlet path and the outlet path of the heat exchanger pipe and configured to be-closed at a time of defrosting so that the COcirculation path becomes a closed circuit;'}{'sub': '2', 'a pressure adjusting unit for adjusting pressure of the COrefrigerant circulating in the closed circuit at the time of defrosting; and'}{'sub': '2', 'a brine circuit in which ...

Air conditioner

An outdoor unit control unit 200 has a defrosting operation condition table 300 a that defines a defrosting operation interval time Tm in accordance with a total sum of rated capacity of indoor units 5 a to 5 c and a refrigerant pipe length as lengths of a liquid pipe 8 and a gas pipe 9 . The outdoor unit control unit 200 uses the total sum of the rated capacity of indoor units 5 a to 5 c input by using an installation information input unit 250 and refers to the defrosting operation condition table 300 a , so as to determine the defrosting operation interval time Tm. Then, the outdoor unit control unit 200 forcibly performs a defrosting operation when the defrosting operation interval time Tm elapses without establishment of a defrosting operation start condition since the last defrosting operation is terminated.

Surged Vapor Compression Heat Transfer Systems with Reduced Defrost Phase Separator

Surged vapor compression heat transfer systems, devices, and methods are disclosed having refrigerant phase separators that generate at least one surge of vapor phase refrigerant into the inlet of an evaporator after the initial cool-down of an on cycle of the compressor. This surge of vapor phase refrigerant, having a higher temperature than the liquid phase refrigerant, increases the temperature of the evaporator inlet, thus reducing frost build up in relation to conventional refrigeration systems lacking a surged input of vapor phase refrigerant to the evaporator. 1. A vapor surge phase separator , comprising:a body portion defining a separator inlet, a separator outlet, and a separator refrigerant storage chamber,where the separator refrigerant storage chamber provides fluid communication between the separator inlet and the separator outlet,where the separator inlet and the separator outlet are between about 40 degrees and about 110 degrees apart,where the separator refrigerant storage chamber has a longitudinal dimension,where a ratio of a diameter of the separator inlet to a diameter of the separator outlet is about 1:1.4 to 4.3, andwhere a ratio of the diameter of the separator inlet to the longitudinal dimension is about 1:7 to 13.2. The phase separator of claim 1 , where a ratio of a diameter of the separator inlet to a diameter of the separator outlet is about 1:1.4 to 2.1.3. The phase separator of claim 1 , where the longitudinal dimension is from about 4 to about 5.5 times a diameter of the separator outlet claim 1 , and wherethe longitudinal dimension is from about 6 to about 8.5 times the diameter of the separator inlet.4. The phase separator of claim 1 , where the separator refrigerant storage chamber has a volume from about 49 cmto about 58 cm.5. The phase separator of claim 1 , having means for separating at least a portion of the vapor from the liquid of an expanded refrigerant.6. The phase separator of claim 1 , having means for intermittently ...

SUBLIMATION DEFROST SYSTEM AND SUBLIMATION DEFROST METHOD FOR REFRIGERATION APPARATUS

A sublimation defrost system for a refrigeration apparatus including: a cooling device in a freezer, and includes a casing containing a heat exchanger pipe; a refrigerating device for cooling and liquefying a COrefrigerant; and a refrigerant circuit connected to the heat exchanger pipe permitting the cooled and liquefied COrefrigerant to circulate. The defrost system includes: a dehumidifier device; a COcirculation path in the heat exchanger pipe, an on-off valve in the heat exchanger; a circulating unit for the COrefrigerant; a first heat exchanger part exchanging heat between a brine as a first heating medium and the circulating COrefrigerant; and a pressure adjusting unit for the circulating COrefrigerant during defrosting so that a condensing temperature of the COrefrigerant becomes equal to or lower than a freezing point of a water vapor in the freezer inner air without a drain receiving unit. 115-. (canceled)16. A sublimation defrost system for a refrigeration apparatus including: a cooling device which is disposed in a freezer , and includes a casing and a heat exchanger pipe disposed in the casing; a refrigerating device for cooling and liquefying a COrefrigerant; and a refrigerant circuit which is connected to the heat exchanger pipe and which is configured to permits the COrefrigerant cooled and liquefied in the refrigerating device to circulate to the heat exchanger pipe , the defrost system comprising:a dehumidifier device for dehumidifying freezer inner air in the freezer;{'sub': '2', 'a COcirculation path which is formed of a circulation path forming path connected to an inlet path and an outlet path of the heat exchanger pipe, and includes the heat exchanger pipe;'}{'sub': '2', 'an on-off valve disposed in each of the inlet path and the outlet path of the heat exchanger pipe and configured to be closed at a time of defrosting so that the COcirculation path becomes a closed circuit;'}{'sub': 2', '2, 'a circulating unit for COrefrigerant, the ...

REFRIGERATION CYCLE APPARATUS

A refrigeration cycle apparatus includes a refrigerant and a refrigeration cycle circuit. The refrigeration cycle circuit includes a compressor, and causes the refrigerant to circulate therethrough. The refrigerant is HFO-based refrigerant alone or a mixed refrigerant. In the mixed refrigerant, a mixing ratio of HFO-based refrigerant is equal to or more than 10% by weight. The compressor includes a motor. The motor includes a portion formed from a resin component. The resin component is made of PET, PA, or the like. 1. A refrigeration cycle apparatus comprising:a refrigerant; anda refrigeration cycle circuit including a compressor, the refrigeration cycle circuit being configured to cause the refrigerant to circulate therethrough,whereinthe refrigerant is an HFO-based refrigerant alone or a mixed refrigerant in which a mixing ratio of an HFO-based refrigerant is equal to or more than 10% by weight,the compressor includes a motor,the motor includes a portion formed from a first resin component, andthe first resin component comprises at least one ofPET (polyethylene terephthalate),PA (polyamide),LCP (liquid crystal polymer),PBT (polyethylene terephthalate),phenol resin,melamine resin,PEEK (polyether ether ketone),PTFE (polytetrafluoroethylene),PAI (polyamideimide),PPS (polyphenylene sulfide), andPEN (polyethylene naphthalate).2. The refrigeration cycle apparatus according to claim 1 , whereina ratio of the first resin component to the refrigerant is equal to or more than 1.5% by weight.3. The refrigeration cycle apparatus according to claim 1 , further comprising:a refrigerating machine oil retained in the compressor; andan acid scavenger added to the refrigerating machine oil,whereina ratio of the acid scavenger to the refrigerant is equal to or less than 1.6% by weight.4. The refrigeration cycle apparatus according to claim 1 , whereinthe first resin component is used to form at least one portion of the motor selected from an insulator, an insulating sleeve, a ...

Frozen evaporator coil detection and defrost initiation

A method is disclosed or detecting a frozen evaporator coil of a refrigerant vapor compression system for supplying conditioned air to a temperature controlled space before ice build-up on the evaporator coil becomes so excessive as to result in an undesirable on-off cycling of the refrigerant vapor compression system compressor when operating to a frozen temperature maintenance mode. The method may also include initiating a defrost of a frozen evaporator coil of the refrigerant vapor compression system before ice build-up on the evaporator coil becomes so excessive as to result in an on-off cycling of the refrigerant vapor compression system compressor when operating to a frozen temperature maintenance mode.

Refrigeration apparatus

Provided is a refrigeration apparatus capable of reducing the leakage of a refrigerant even when a refrigerant leak occurs in a defrosting operation of a usage-side heat exchanger. When a refrigerant leak situation around a usage-side heat exchanger satisfies a predetermined leak condition in performing a defrosting operation with a connection state of a four-way switching valve brought into a defrosting connection state in which a heat source-side heat exchanger functions as an evaporator for a refrigerant and a usage-side heat exchanger functions as a radiator for the refrigerant, a controller performs density lowering control to lower a refrigerant density in the usage-side heat exchanger while maintaining the four-way switching valve at the defrosting connection state.

DEFROSTING VALVE

Disclosed in the present invention is a defrosting valve, characterized by comprising a valve body provided with a valve core therein and an upper cover thereon; a push piston is disposed in the valve core; the push piston is in a T-shape; the upper part of the push piston is inserted in the cavity of the upper cover; a return tension spring is sleeved at the lower part of the upper cover; the upper end of the return tension spring is connected to the upper cover, and the lower end is connected to the lower end of the push piston; a lower table top is disposed at the lower part in the valve body; a flow channel inlet is disposed on the upper cover; a bidirectional flow channel opening is disposed on the side wall of the valve body; and a flow channel outlet is disposed at the lower end of the valve body. Compared to the prior art, the present invention has the following positive effects: the present invention has a simple and reasonable structure and a long service life, and can sectionally defrost an evaporator, thus greatly improving the heating efficiency of an air-conditioner. 1. A defrosting valve , characterized by comprising a valve body provided with a valve core therein and an upper cover thereon; a push piston is disposed in the valve core; the push piston is in a T-shape; the upper part of the push piston is inserted in the cavity of the upper cover; a return tension spring is sleeved at the lower part of the upper cover; the upper end of the return tension spring is connected to the upper cover , and the lower end is connected to the lower end of the push piston; a lower table top is disposed at the lower part in the valve body; a flow channel inlet is disposed on the upper cover; a bidirectional flow channel opening is disposed on the side wall of the valve body; and a flow channel outlet is disposed at the lower end of the valve body.2. The defrosting valve according to claim 1 , characterized in that the calibers of the bidirectional flow channel ...

Refrigerating and air-conditioning system and system controller

A refrigerating and air-conditioning system includes a plurality of independent refrigerating and air-conditioning apparatuses each including a refrigerant circuit and a defrosting unit, and further includes a system controller managing the apparatuses in an integrative manner. The system controller includes a defrosting operation control unit. When a time interval between an estimated defrosting start time calculated for a given refrigerating and air-conditioning apparatus and a subsequent estimated defrosting start time calculated for another refrigerating and air-conditioning apparatus is less than or equal to a predetermined target start time interval, the defrosting operation control unit transmits a defrosting start instruction signal to the defrosting unit of the given refrigerating and air-conditioning apparatus.

REFRIGERATION CYCLE APPARATUS AND AIR-CONDITIONING APPARATUS

A refrigeration cycle apparatus including a refrigerant circuit including a compressor, an indoor heat exchanger, an expansion device, an outdoor heat exchanger, an outside air temperature sensor, and a controller configured to perform a hot gas defrosting operation and a reverse-defrosting operation based on a temperature obtained by the outside air temperature sensor. In the hot gas defrosting operation, hot gas discharged from the compressor without passing through the indoor heat exchanger is supplied to the outdoor heat exchanger. In the reverse-defrosting operation, refrigerant passing through the indoor heat exchanger is supplied from the compressor to the outdoor heat exchanger. The controller has at least a mixed defrosting operation mode in which the hot gas defrosting operation and the reverse-defrosting operation are performed in sequence. The controller is configured to start the mixed defrosting operation mode when the temperature obtained by the outside air temperature sensor satisfies a preset condition. 1. A refrigeration cycle apparatus comprising:a refrigerant circuit including a compressor, an indoor heat exchanger, an expansion device, and an outdoor heat exchanger connected to each other via refrigerant pipes;an outside air temperature sensor configured to measure an outside air temperature;an outdoor heat exchanger temperature sensor configured to measure a temperature of the outdoor heat exchanger; anda controller configured to perform a hot gas defrosting operation and a reverse-defrosting operation on a basis of a measured temperature obtained by the outside air temperature sensor and a measured temperature obtained by the outdoor heat exchanger temperature sensor,in the hot gas defrosting operation, hot gas discharged from the compressor without passing through the indoor heat exchanger being supplied to the outdoor heat exchanger,in the reverse-defrosting operation, refrigerant passing through the indoor heat exchanger being supplied from ...

REFRIGERATION CYCLE APPARATUS AND AIR-CONDITIONING APPARATUS

A refrigeration cycle apparatus includes a refrigerant circuit including a compressor, an indoor heat exchanger, an expansion device, and an outdoor heat exchanger connected to each other via refrigerant pipes. The outdoor heat exchanger includes a heat transfer pipe, and a plurality of fins. The outdoor heat exchanger is configured so that a ratio of a heat capacity of the plurality of fins to a total of heat capacities of the heat transfer pipe and the plurality of fins is not more than 50%. The refrigeration cycle apparatus has a mixed defrosting operation mode in which a hot gas defrosting operation and a reverse-defrosting operation are performed in sequence. In the hot gas defrosting operation, hot gas discharged from the compressor is supplied to the outdoor heat exchanger. In the reverse-defrosting operation, refrigerant passing through the indoor heat exchanger is supplied from the compressor to the outdoor heat exchanger. 1. A refrigeration cycle apparatus comprising a refrigerant circuit including a compressor , an indoor heat exchanger , an expansion device , and an outdoor heat exchanger connected to each other via refrigerant pipes , the refrigerant pipes including a pipe connecting the expansion device and the outdoor heat exchanger to each other ,the outdoor heat exchanger including a heat transfer pipe connected to the refrigerant pipes and made of aluminum, and a plurality of fins connected to the heat transfer pipe,the outdoor heat exchanger being configured so that a ratio of a heat capacity of the plurality of fins to a total of heat capacities of the heat transfer pipe and the plurality of fins is not more than 50%,the refrigeration cycle apparatus being configured to perform a hot gas defrosting operation and subsequently perform a reverse-defrosting operation after the hot gas defrosting operation is performed,in the hot gas defrosting operation, hot gas discharged from the compressor without passing through the indoor heat exchanger being ...

WATER HEATER APPLIANCE AND A METHOD FOR OPERATING THE SAME

A method for defrosting an evaporator of a water heater appliance is provided. The method includes initiating a defrost cycle of the water heater appliance, deactivating a compressor of the water heater appliance during the defrost cycle of the water heater appliance, and operating a fan of the water heater appliance during the defrost cycle of the water heater appliance. A related water heater appliance is also provided. 1. A method for defrosting an evaporator of a water heater appliance , comprising:initiating a defrost cycle of the water heater appliance;deactivating a compressor of the water heater appliance during the defrost cycle of the water heater appliance; andoperating a fan of the water heater appliance during the defrost cycle of the water heater appliance, the fan of the water heater appliance drawing a flow of air across the evaporator of the water heater appliance during said step of operating.2. The method of claim 1 , further comprising establishing that the evaporator of the water heater appliance is frosted over prior to said step of initiating.3. The method of claim 2 , wherein said step of establishing comprises measuring an ambient temperature claim 2 , t claim 2 , at the water heater appliance;{'sub': a', 't, 'comparing the ambient temperature tto a threshold temperature, t;'}{'sub': 'o', 'gauging a refrigerant outlet temperature, t, of the evaporator; and'}{'sub': a', 'r', 'o, 'determining whether a difference between the ambient temperature tand a reference temperature, t, is less than the refrigerant outlet temperature t.'}4. The method of claim 3 , wherein the threshold temperature tis about forty-five degrees Fahrenheit and the reference temperature tis about fourteen degrees Fahrenheit.5. The method of claim 1 , wherein refrigerant from a condenser of the water heater appliance flows to the evaporator of the water heater appliance during said step of operating.6. The method of claim 5 , wherein the refrigerant from the condenser of the ...

COIL HEATING SYSTEMS FOR HEAT PUMP SYSTEMS

A heat pump system includes a heat exchanger coil and a heater configured to transfer heat to the heat exchanger coil. The heat pump system also includes a controller communicatively coupled to the heater. The controller is configured to activate the heater in response to determining that a detected temperature of the heat exchanger coil is below a threshold temperature for a threshold time period. 1. A heat pump system , comprising:a heat exchanger coil;a heater configured to transfer heat to the heat exchanger coil; anda controller communicatively coupled to the heater, wherein the controller is configured to activate the heater in response to determining that a detected temperature of the heat exchanger coil is below a threshold temperature for a threshold time period.2. The heat pump system of claim 1 , wherein the heater is a resistive heater.3. The heat pump system of claim 2 , wherein the resistive heater comprises a coating disposed on the heat exchanger coil to increase resistivity.4. The heat pump system of claim 1 , wherein the heater further comprises resistive heating element coupled to the heat exchanger coil.5. The heat pump system of claim 1 , wherein the controller is configured to activate the heater in a heating mode of the heat pump system in response to a request for supplemental heating of a conditioned interior space.6. The heat pump system of claim 1 , wherein the heat pump system is configured to provide heated air to a conditioned interior space of a building in a heating mode of the heat pump system claim 1 , and wherein the heat pump system is configured to provide the heated air to the conditioned interior space of the building and mitigate frost formation on the heat exchanger coil in a defrost mode of the heat pump system.7. The heat pump system of claim 1 , wherein the heat exchanger coil is configured to operate as a condenser in both a heating mode and a defrost mode of the heat pump system.8. The heat pump system of claim 1 , ...

DE-ICING CONTROL IN A VEHICLE HEAT PUMP SYSTEM

Methods and systems are provided for operating a dual loop heat pump system in a de-icing mode which enables the heat pump system to maintain a target rate of heat delivery to a cabin while de-icing an outside heat exchanger by leveraging waste-heat available at one or more waste-heat sources. In one example, responsive to an outside heat exchanger de-icing request and a cabin heating request, selecting a first waste-heat heat exchanger based on a temperature of the first waste-heat heat exchanger exceeding a first temperature threshold, flowing coolant to the first waste-heat heat exchanger, flowing a first portion of the coolant exiting the first waste-heat heat exchanger to a cabin heat exchanger, and flowing a second portion of the coolant exiting the first waste-heat heat exchanger to an outside heat exchanger. 1. A method comprising:selecting a first waste-heat heat exchanger based on a temperature of the first waste-heat heat exchanger exceeding a first temperature threshold;flowing coolant in a first coolant loop through the first waste-heat heat exchanger;flowing the coolant in the first coolant loop through an evaporator heat exchanger, wherein the evaporator heat exchanger is thermally coupled to a gas cooler heat exchanger by a refrigerant loop;flowing a first portion of the coolant in a second coolant loop exiting the gas cooler heat exchanger through a cabin heat exchanger; andflowing a second portion of the coolant in the second coolant loop exiting the gas cooler heat exchanger through an outside heat exchanger.2. The method of claim 1 , wherein a ratio of the first portion to the second portion is based on a cabin heating request and an outside heat exchanger de-icing request.3. The method of claim 2 , wherein the cabin heating request comprises a target rate of cabin heat delivery claim 2 , and wherein the outside heat exchanger de-icing request comprises a target rate of outside heat exchanger heat delivery.4. The method of claim 3 , wherein the ...

AIR-CONDITIONING APPARATUS

An air-conditioning apparatus is capable of efficiently performing defrosting operation without suspending a heating operation of an indoor unit. The air-conditioning apparatus includes a main circuit sequentially connecting, via a pipe, a compressor, indoor heat exchangers, first flow control devices, and a plurality of parallel heat exchangers connected in parallel to each other to allow refrigerant to circulate, first defrost pipes branching a part of the refrigerant discharged from the compressor and causing the part of the refrigerant to flow into one of the plurality of parallel heat exchangers and to be defrosted, an interface heat exchanger located between the plurality of parallel heat exchangers, a first bypass pipe branching a part of the refrigerant discharged from the compressor and causing the part of the refrigerant to flow into the interface heat exchanger, and a second bypass pipe causing the part of the refrigerant flowing out of the interface heat exchanger to flow into the main circuit. 1. (canceled)2. An air-conditioning apparatus comprising:a main circuit sequentially connecting, via a pipe, a compressor, an indoor heat exchanger, a first flow control device, and a plurality of parallel heat exchangers connected in parallel to each other to allow refrigerant to circulate;a defrost pipe branching a part of the refrigerant discharged from the compressor and causing the part of the refrigerant to flow into one of the plurality of parallel heat exchangers;an interface heat exchanger located between the plurality of parallel heat exchangers;a first bypass pipe branching a part of the refrigerant discharged from the compressor and causing the part of the refrigerant to flow into the interface heat exchanger;a second bypass pipe causing the part of the refrigerant flowing out of the interface heat exchanger to flow into the main circuit; andone or both ofa first expansion device configured to depressurize the refrigerant discharged from the compressor ...

REFRIGERATOR

A refrigerator includes a compressor configured to compress a refrigerant, a condenser configured to condense the refrigerant compressed in the compressor, an expander configured to depressurize the refrigerant condensed in the condenser, a plurality of evaporators configured to evaporate the refrigerant depressurized in the expander, a first valve configured to be operated to introduce the refrigerant into at least one of the plurality of evaporators, a hot gas valve device disposed at an inlet side of the first valve and configured to guide the refrigerant passed through the compressor or the condenser to the plurality of evaporators, and a hot gas path configured to extend from the hot gas valve device to the plurality of evaporators. 1. A refrigerator comprising:a compressor configured to compress a refrigerant;a condenser configured to condense the refrigerant compressed in the compressor;a first connection pipe that connects an outlet of the compressor to the condenser;an expander configured to depressurize the refrigerant condensed in the condenser;a plurality of evaporators configured to evaporate the refrigerant depressurized in the expander, the plurality of evaporators comprising a first evaporator and a second evaporator;a first valve configured to be operated to introduce the refrigerant into at least one of the plurality of evaporators;one or more hot gas valves that are disposed at the first connection pipe, that are disposed at an inlet side of the first valve, and that are configured to provide the refrigerant from the compressor to the plurality of evaporators; anda hot gas path that extends from one of the one or more hot gas valves to one of the plurality of evaporators.2. The refrigerator according to claim 1 , wherein the one or more hot gas valves comprise:a second valve that is disposed at an outlet side of the compressor; anda third valve that is disposed at an outlet side of the second valve.3. The refrigerator according to claim 2 , ...

Vehicle air conditioner

There is disclosed a vehicle air conditioner which improves a frost formation judging precision of an outdoor heat exchanger, acquires a heating performance, and avoids useless defrosting, thereby achieving reduction of power consumption. A controller executes a heating mode. A controller 32 judges frost formation onto an outdoor heat exchanger 7 on the basis of a refrigerant evaporation pressure PXO of the outdoor heat exchanger 7 and a refrigerant evaporation pressure PXObase of the outdoor heat exchanger 7 during non-frost formation or on the basis of a refrigerant evaporation temperature TXO of the outdoor heat exchanger 7 and a refrigerant evaporation temperature TXObase of the outdoor heat exchanger 7 during the non-frost formation, and allows a high-temperature refrigerant gas to flow through the outdoor heat exchanger 7 , thereby performing defrosting of the outdoor heat exchanger 7.

SYSTEMS AND METHODS FOR FREE AND POSITIVE DEFROST

A heat pump system includes a refrigerant circuit, at least one compressor, an evaporator, and a controller programmed to defrost the evaporator in a defrost mode, wherein in the defrost mode the controller is programmed to monitor the evaporator to detect frost creation thereon, and reduce the speed of the at least one compressor and/or reduce the number of some, but not all operating compressors of the at least one compressor, if frost creation is detected on the evaporator. In some embodiments, the controller is programmed to defrost the evaporator in a second defrost mode. In the second defrost mode the controller is programmed to monitor the evaporator to detect frost creation thereon, turn off the at least one compressor when frost is detected on the evaporator, and operate a fan to force ambient air over the evaporator to defrost the evaporator. 1. A heat pump system comprising:a refrigerant circuit;at least one compressor;an evaporator; and monitor the evaporator to detect frost creation thereon; and', 'reduce the speed of the at least one compressor and/or reduce the number of some, but not all operating compressors of the at least one compressor, if frost creation is detected on the evaporator., 'a controller programmed to defrost the evaporator in a defrost mode, wherein in the defrost mode the controller is programmed to2. The heat pump system of claim 1 , wherein in the defrost mode the controller is further programmed to subsequently monitor a temperature of the evaporator to determine if the monitored temperature increases and exceeds a predetermined temperature after the compressor speed reduction and/or the reduced operating compressor numbers.3. The heat pump system of claim 1 , wherein the controller is programmed to defrost the evaporator in a second defrost mode claim 1 , wherein in the second defrost mode the controller is programmed to:monitor the evaporator to detect frost creation thereon;turn off the at least one compressor when frost is ...

Passive Heat Recovery or Defrosting Device Using a Closed Loop Heat Transfer Circuit

A passive heat recovery or defrosting apparatus features an evaporator, a condenser, and vapour and liquid conveyance lines connected therebetween. The vapour and liquid conveyance lines respectively connect to upper and lower ends of the evaporator and condenser. The evaporator and/or condenser has a ring-shaped body for fitting around or inline with a pipe to achieve heat exchange relation with a fluid passing therethrough. The evaporator is installed on or inside a warm pipe or duct (e.g. waste drain pipe, clothes dryer exhaust duct, flue pipe, or indoor section of a sewer vent stack) at a lower elevation than the condenser. The condenser is placed on an outdoor end of either a sewer stack or air intake duct for defrosting purposes, or is placed on a water supply line or air intake of a hot water tank, clothes dryer, etc. Working fluid circulates passively between the evaporator and condenser. 1. A passive heat recovery or defrosting apparatus comprising:an evaporator;a condenser;fluid conveyance lines connected between the evaporator and the condenser to form a closed loop therewith, said fluid conveyance lines including a vapour conveyance line for travel of vapour from the evaporator to the condenser and a liquid conveyance line for travel of liquid from the condenser to the evaporator;a working fluid contained within said closed loop;wherein either the evaporator of the condenser comprises a first ring-shaped body for placement around or inline with a first pipe or duct in order to undergo heat exchange with a substance flowing through of said first pipe or duct, said first ring-shaped body having a first annular internal chamber into which the liquid conveyance opens near a bottom end of said chamber, and into which the vapour conveyance line opens at a more elevated location than said liquid conveyance line; andsaid vapour and liquid conveyance lines are routed, or are routable, downwardly from said condenser to a point of lower elevation at a spaced ...

De-icing control in a vehicle heat pump system

Methods and systems are provided for operating a dual loop heat pump system in a de-icing mode which enables the heat pump system to maintain a target rate of heat delivery to a cabin while de-icing an outside heat exchanger by leveraging waste-heat available at one or more waste-heat sources. In one example, responsive to an outside heat exchanger de-icing request and a cabin heating request, selecting a first waste-heat heat exchanger based on a temperature of the first waste-heat heat exchanger exceeding a first temperature threshold, flowing coolant to the first waste-heat heat exchanger, flowing a first portion of the coolant exiting the first waste-heat heat exchanger to a cabin heat exchanger, and flowing a second portion of the coolant exiting the first waste-heat heat exchanger to an outside heat exchanger.

Energy saving refrigeration and defrosting system through 3 stage condensation heat exchangers

The present invention relates to an energy saving refrigeration and defrosting system through 3 stage condensation heat exchangers. More specifically, the high-temperature vapor refrigerant in the refrigeration system is condensed using 3 stage condensation heat exchangers such as a tubular tube, a condensation heat exchange tank and a brine tank. This invention relates to an energy saving refrigeration and defrosting system using 3 stage condensation heat exchangers in place of a conventional refrigeration condenser.

COMPRESSOR FOR REFRIGERATING MACHINE

A compressor includes a casing and a metallic coating. The casing includes a low-pressure casing part covering a low-pressure space and a high-pressure casing part covering a high-pressure space. The metallic coating is formed at least on a part of an outer surface of the casing. The metallic coating includes a low-pressure part coating formed in the low-pressure casing part, a high-pressure part coating formed in the high-pressure casing part, and a welded part coating formed in a welded part. At least either the average thickness of the low-pressure part coating or the average thickness of the welded part coating is greater than the average thickness of the high-pressure part coating. 1. A compressor , comprising:a casing; anda metallic coating,the casing being configured to cover an internal space, the internal space including a low-pressure space configured to contain a low-pressure fluid, the internal space including a high-pressure space configured to contain a high-pressure fluid, the casing having a low-pressure casing part covering the low-pressure space, the casing having a high-pressure casing part covering the high-pressure space, and the metallic coating being formed at least on a part of an outer surface of the casing, a low-pressure part coating formed in the low-pressure casing part,', 'a high-pressure part coating formed in the high-pressure casing part, and', 'a welded part coating formed in a welded part, the welded part being formed in the casing, and, 'the metallic coating including'}at least either an average thickness of the low-pressure part coating or an average thickness of the welded part coating being greater than an average thickness of the high-pressure part coating.2. A compressor , comprising:a casing; anda metallic coating,the casing being configured to cover an internal space, the internal space including a low-pressure space configured to contain a low-pressure fluid, the internal space including a high-pressure space configured to ...

REFRIGERATOR WITH TANDEM EVAPORATORS

A refrigerator and method utilize a pair of tandem evaporators to provide cooling for both a compartment and an ice making system of a refrigerator. An upstream evaporator in the pair of tandem evaporators provides cooling for a compartment such as a freezer, fresh food, flexible cooling, or quick cooling compartment, while a downstream evaporator is in fluid communication with the upstream evaporator to receive a portion of the air cooled by the upstream evaporator and further cool the received portion for use in cooling one or more components of the ice making system. 1. A refrigerator , comprising:a cabinet including a freezer compartment and a fresh food compartment disposed above the freezer compartment, the fresh food compartment including an ice maker sub-compartment and an evaporator sub-compartment that each define an at least partially segregated volume from a volume in the fresh food compartment within which fresh food is stored;a door coupled to the cabinet adjacent an opening of the fresh food compartment and configured to provide access to the fresh food compartment;an ice maker mold disposed within the ice maker sub-compartment of the fresh food compartment and configured to produce ice;an ice dispenser disposed on the door and configured to dispense ice produced by the ice maker mold;a first evaporator disposed in the freezer compartment;a second evaporator disposed in the evaporator sub-compartment of the fresh food compartment;a passageway extending between the evaporator sub-compartment and the ice maker sub-compartment and disposed downstream of the second evaporator such that air passing across the second evaporator and through the passageway toward the ice maker sub-compartment is conveyed directly to the ice maker sub-compartment without first passing through the volume in the fresh food compartment in which fresh food is stored; andone or more fans positioned to move air across each of the first and second evaporators;wherein the first ...

REFRIGERANT CYCLE APPARATUS

A refrigerant cycle apparatus is configured to suppress extension of defrost time. The refiigerant cycle apparatus includes: a refrigerant circuit including a compressor, a heat source heat exchanger having a main heat exchange unit, a sub heat exchange unit and a pressure loss portion disposed between the main heat exchange unit and the sub heat exchange unit, an expansion mechanism, a utilization heat exchanger, and a flow direction switching mechanism configured to switch a flow direction of a refrigerant; a first temperature sensor configured to measure first refrigerant temperature between the main heat exchange unit and the pressure loss portion; a second temperature sensor configured to measure second refrigerant temperature between the pressure loss portion and the expansion mechanism; and a controller configured to control the flow direction switching mechanism to switch between normal operation and defrost operation. The controller has control modes for the defrost operation, including a control mode of terminating the defrost operation based on the first refrigerant temperature and a control mode of terminating the defrost operation based on the second refrigerant temperature. 1. A refrigerant cycle apparatus comprising:a refrigerant circuit including a compressor configured to compress a refrigerant, a first heat exchange unit having a main heat exchange unit, a sub heat exchange unit, and a pressure loss portion disposed on a flow path of the refrigerant between the main heat exchange unit and the sub heat exchange unit, a second heat exchange unit, an expansion mechanism disposed on the flow path of the refrigerant between the first heat exchange unit and the second heat exchange unit and configured to decompress the refrigerant, and a flow direction switching mechanism configured to switch a flow direction of the refrigerant discharged from the compressor, between a first flow direction of the refrigerant flowing in an order of the second heat ...

System and Method of Hot Gas Defrost Control for Multistage Cascade Refrigeration System

The present invention provides a system and method for an improved multistage, cascade refrigeration system using hot gas defrost to rid the evaporator of ice build-up which accumulates over time, while the air in the evaporator enclosure remains below the freezing point of water. The present invention thus provides greater defrost flexibility with increased ease of design and implementation than current refrigeration systems, which allows for more robust hot gas defrost function for multistage refrigeration systems, such that it is unaffected by temperature changes of the condensing fluid (ambient air temperature for air cooled condensers, water temperature for water cooled condensers), and can be readily adapted to any refrigerant suitable for a selected temperature range. 1. An improved system of hot gas defrost for a multistage , cascade refrigeration system , said multistage cascade system comprised of a first stage and a second stage , said improved system of hot gas defrost function comprising:a first stage liquid expansion valve;a second stage liquid expansion valve;a second stage hot gas valve;a superheat board in the first stage for monitoring pressures and temperatures in the first stage, and a superheat board in the second stage for monitoring pressures and temperatures in the second stage, said superheat board in the first stage also controlling refrigerant flow in the first stage liquid expansion valve, said superheat board in the second stage also controlling refrigerant flow in the second stage liquid expansion valve;a system controller comprised of a plurality of electronic components;a central heat exchanger;a compressor for each of the first and the second stage liquid expansion valves;a pressure sensing device for each of the first and the second stage liquid expansion valves;a temperature sensing device;a condenser for the first stage; andan evaporator coil enclosure for the second stage, wherein ice build-up in the evaporator coil enclosure is ...

Continuous Heating Control System and Method, and Air-Conditioning Device

A continuous heating control system and method, and an air-conditioning device. The system includes a defrosting solenoid valve () arranged on a bypass pipeline, wherein one end of the bypass pipeline is connected to an oil separator (), and the other end of the bypass pipeline is connected to an outdoor heat exchanger (); and a heating structure which is arranged at the bottom of a gas separator () and used for heating the gas separator (). 1. A continuous heating control system , comprising:a defrosting solenoid valve arranged on a bypass pipeline, wherein one end of the bypass pipeline is connected to an oil separator, and another end of the bypass pipeline is connected to an outdoor heat exchanger; anda heating structure arranged at a bottom of a gas separator and configured to heat the gas separator.2. The continuous heating control system according to claim 1 , wherein the heating structure comprises:a heating tank arranged at the bottom of the gas separator, wherein a first pipeline connected to the heating tank is provided at the bottom of the gas separator; anda first electrical heating member arranged outside the heating tank.3. The continuous heating control system according to claim 2 , further comprising:a first branch, wherein a first end of the first branch is arranged in a pipeline between a rear end of a supercooler electronic expansion valve and a supercooler, and a second end of the first branch is connected to an enthalpy increasing tube.4. The continuous heating control system according to claim 3 , wherein:the first branch is provided with a second electrical heating member and a first enthalpy increasing valve, and a third end of the first branch is arranged between the second electrical heating member and the first enthalpy increasing valve and is connected to the heating tank.5. The continuous heating control system according to claim 2 , wherein the first pipeline is provided with a liquid inlet valve.6. The continuous heating control ...

Холодильная машина и способ эксплуатации для нее

Изобретение относится к холодильному аппарату с холодильной машиной и способу его эксплуатации. Холодильная машина выполнена с компрессором (1), конденсатором (2) и испарителем (5), соединенными в холодильный контур. На пути хладагента от конденсатора (2) к испарителю (5) встроен запорный вентиль (3). Контроллер (6) закрывает запорный вентиль (3) при отключенном компрессоре (1) и открывает запорный вентиль (3) при включенном компрессоре (1). Холодильный аппарат является бытовым холодильным аппаратом. Контроллер (6) настроен так, чтобы можно было как открывать, так и не открывать запорный вентиль (3) при отключенном компрессоре (1). Компрессор (1) работает с перерывами и при отключении компрессора (1) запорный вентиль (3) закрывают, а при включении компрессора (1) запорный вентиль (3) открывают. Для оттаивания испарителя (5) запорный вентиль (3) при отключенном компрессоре (1) как минимум временно открывают. Изобретение направлено на повышение кпд холодильной машины. 2 н. и 5 з.п. ф-лы, 1 ил. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 459 159 (13) C2 (51) МПК F25B 41/04 F25B 47/02 (2006.01) (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2009105681/06, 07.08.2007 (24) Дата начала отсчета срока действия патента: 07.08.2007 (72) Автор(ы): ФОТИАДИС Панагиотис (DE), ИЛЕ Ханс (DE) (43) Дата публикации заявки: 10.10.2010 Бюл. № 28 2 4 5 9 1 5 9 (45) Опубликовано: 20.08.2012 Бюл. № 23 (56) Список документов, цитированных в отчете о поиске: US 5630323 A, 20.05.1997. JP 2002-364937 A, 18.12.2002. SU 307591 A1, 21.06.1971. JP 2002243339 A, 28.08.2002. US 3894404 A, 15.07.1975. JP 2004-340402 A, 02.12.2004. US 3871187 A, 18.03.1975. 2 4 5 9 1 5 9 R U (86) Заявка PCT: EP 2007/058163 (07.08.2007) C 2 C 2 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 30.03.2009 (87) Публикация заявки РСТ: WO 2008/025650 (06.03.2008) Адрес для переписки: 191186, Санкт-Петербург, а/я 230, "АРСПАТЕНТ", пат.пов. В.М.Рыбакову ...

电子膨胀阀热气化霜系统压缩冷凝机组

本发明公开了电子膨胀阀热气化霜系统压缩冷凝机组。其包括压缩机、供液管、回气管、热气管和蒸发器，所述压缩机上设置有油分离器，油分离器与冷凝器和热气管均连通，所述冷凝器与储液器连通，储液器与板式换热器连通，板式换热器的一个出口与供液管连通，板式换热器的另外一个出口与压缩机连通，供液管上设置有电子膨胀阀，电子膨胀阀上并联着旁通电磁阀，电子膨胀阀与蒸发器连通，热气管上设置有热气管电磁阀，热气管与蒸发器连通，回气管和热气管连通在一起，回气管上设置有回气电磁阀，回气管与气液分离器连通，气液分离器的气出口与压缩机连通。本发明节能环保，灵活调整蒸发器前电子膨胀阀的开度，实现系统匹配。

Hot gas defrosting type refrigeration system

The present invention relates to a hot gas defrosting type freezer system which has hot gas flowing inside an evaporator coil to remove frost on an outer surface of the evaporator coil, promptly and smoothly removes frost on a lower drain of the evaporator, and prevents damages to a compressor due to refrigerant liquefied by a hot gas defrosting process. The freezer system includes a compressor; a condenser connected to the compressor and a first pipe and having an oil separator installed on a pipe channel of the first pipe; an evaporator connected to the condenser and a second pipe, having a liquid receiver and a dryer installed on a pipe channel of the second pipe, connected to the compressor and a third pipe, having a liquid separator installed on a pipe channel of the third pipe, and installed inside a freezer; an expansion valve installed on the pipe channel of the second pipe in front of the evaporator; a hot gas defrost unit having a hot gas introduction pipe having one end connected to the first pipe and a first opening/closing valve installed on a pipe channel, a defrost coil having one end connected to the hot gas introduction pipe and arranged in the lower drain of the evaporator, and a hot gas supply pipe having one end connected to the defrost coil and the other end connected to the second pipe between the expansion valve and the evaporator; and a vaporization unit installed at the third pipe between the evaporator and the liquid separator, detecting the liquefied refrigerant introduced to the compressor through the third pipe, and vaporizing the liquefied refrigerant.

空调器的控制方法

本发明公开了一种空调器的控制方法，空调器包括压缩机、室内换热器、室外换热器、电辅助加热器、室内风机和除霜加热件，除霜加热件在除霜模式时加热从室外换热器流向压缩机的回气口的冷媒；控制方法包括如下步骤：接收除霜指令，控制电辅助加热器开启；获取电辅助加热器的最大电流限制值Dmax或空调器的电源线的电源线限流值C；当电辅助加热器的运行电流Dr超过最大电流限制值Dmax或者电源线的电流超过电源线限流值C时，降低电辅助加热器的运行电流。由此，在除霜模式时，能够避免室内温度下降，可以防止室内温度波动，从而可以提升用户体验，并且，也能够防止空调器过载，可以提升空调器的使用安全性。

用于空调除霜的控制方法及装置、空调

本申请涉及空调除霜技术领域，公开一种用于空调除霜的控制方法。控制方法包括：在空调需要进行除霜的情况下，控制对流经空调的室外换热器的冷媒进液管路和冷媒出液管路的冷媒加热；获得室外换热器的冷媒进液温度差值和室外换热器的预设位置温度；在冷媒进液温度差值和预设位置温度满足除霜退出条件的情况下，控制停止加热。利用室外换热器的冷媒进液温度差值和预设位置温度这几个参数综合判断空调退出除霜的时机，从而可以有效提高对控制空调退出除霜的控制精度；并通过对流经冷媒进液管路和冷媒出液管路的冷媒的加热操作，降低冰霜凝结对空调自身制热性能的不利影响。本申请还公开一种用于空调除霜的控制装置及空调。

Control method and device for defrosting of air conditioner and air conditioner

本申请涉及空调除霜技术领域，公开一种用于空调除霜的控制方法。控制方法包括：在空调运行制热模式过程中，获取室内机的室内进风温度、室内盘管温度以及室外换热器的上壳体温度；在根据室内进风温度、室内盘管温度和上壳体温度确定满足除霜进入条件后，控制对流经空调的室外换热器的冷媒进液管路和冷媒出液管路的冷媒进行加热。该控制方法能够根据室内进风温度、室内盘管温度以及室外换热器的上壳体温度对空调是否满足除霜进入条件的判断，提高对控制空调除霜的控制精度；并通过对流经冷媒进液管路和冷媒出液管路的冷媒的加热操作，降低冰霜凝结对空调自身制热性能的不利影响。本申请还公开一种用于空调除霜的控制装置及空调。

Air-conditioning system and its defrosting control method

本发明公开了一种空调系统，包括室内换热器、室外换热器、压缩机和四通换向阀：压缩机包括储液罐，压缩机设有排气口和吸气口，储液罐设有回气口，回气口与吸气口连通；四通换向阀具有第一端至第四端，第一端与压缩机的排气口连通，第二端连接室内换热器的进口，第三端连接室外换热器的出口，第四端与回气口连通；空调系统还包括旁通回路，旁通回路连接在压缩机的排气口与室外换热器的进口之间，旁通回路包括控制阀和喷射器。本发明还公开了一种空调系统除霜控制方法。采用本发明的方法除霜，不但不影响制热效果，而且能够稳定室内环境温度，减少四通换向阀换向动作，从而增加了设备的可靠性，提高了用户使用舒适性。

Air conditioning equipment

发明公开一种空调设备，包括四通换向阀（3）连通的油分离器（2）、压缩机（1）、气液分离器（2）、气管截止阀（39）、室内机单元和室外换热器（6）通路，四通换向阀（4）连通的油分离器（2）、压缩机（1）、气液分离器（2）、气管截止阀（39）、室内机单元和室外换热器（7）通路，四通换向阀（5）连通的油分离器（2）、压缩机（1）、气液分离器（2）和蓄热换热器（21）通路；采用双室外换热器分区除霜和同时除霜两种方式，基于室外风机的耗功峰值与室外风机的耗功启动值之间的关系作为两种除霜方式的判断条件，以保证室内制热效果为优先，实现了室内制热与室外除霜之间的热量均衡。

A kind of defrosting device, heat pump unit and control method

本发明公开了一种化霜装置、热泵机组及控制方法，化霜装置包括：压缩机、化霜换热部和分离装置，压缩机排出的冷媒可从并联的化霜支路和加热支路进入分离装置，化霜换热部串联在化霜支路中，分离装置内的气态冷媒送回压缩机。本发明能有效提高热泵机组的化霜效率。

Control method and device for defrosting of air conditioner and air conditioner

本申请涉及空调除霜技术领域，公开一种用于空调除霜的控制方法。控制方法包括：在所述空调运行制热模式过程中，获取第一室外盘管温度、冷媒进液温度和冷媒出液温度；在根据所述第一室外盘管温度、所述冷媒进液温度和所述冷媒出液温度确定满足除霜进入条件后，控制对流经所述空调的室外换热器的冷媒进液管路的冷媒进行加热。本公开实施例提供的控制方法能够根据室外盘管温度、冷媒进液温度和冷媒出液温度对空调是否满足除霜进入条件的判断，提高了对控制空调除霜的控制精度；并通过对流经冷媒进液管路的冷媒的加热操作，提高流入室外换热器的冷媒温度，进而融化室外换热器上凝结的冰霜。本申请还公开一种用于空调除霜的控制装置及空调。

The control method and device of electric expansion valve in a kind of air conditioner and its defrosting

本发明涉及一种空调器及其除霜中电子膨胀阀的控制方法和装置，该控制方法包括：控制电子膨胀阀的开度为第一开度，并切换四通阀，使空调器进入除霜模式；当第一开度持续第一时间T1时，检测当前工况下蒸发器的出水温度，以及出水温度对应的控制目标压力；检测当前蒸发压力；根据控制目标压力和当前蒸发压力，确定电子膨胀阀的控制开度；控制电子膨胀阀以控制开度进行调节，从而可以确保系统稳定，避免电子膨胀阀检测温度压力失真导致控制失调，导致机组待液，长时间影响机组性能等问题。

For the control method of air-conditioner defrosting, device and air-conditioning

本申请涉及空调除霜技术领域，公开一种用于空调除霜的控制方法。控制方法包括：在所述空调运行制热模式过程中，获取第一室外盘管温度、冷媒进液温度和冷媒出液温度；在根据所述第一室外盘管温度、所述冷媒进液温度和所述冷媒出液温度确定满足除霜进入条件后，控制对流经所述空调的室外换热器的冷媒进液管路的冷媒进行加热。本公开实施例提供的控制方法能够根据室外盘管温度、冷媒进液温度和冷媒出液温度对空调是否满足除霜进入条件的判断，提高了对控制空调除霜的控制精度；并通过对流经冷媒进液管路的冷媒的加热操作，提高流入室外换热器的冷媒温度，进而融化室外换热器上凝结的冰霜。本申请还公开一种用于空调除霜的控制装置及空调。

System and method of autonomous and uninterrupted defrosting

FIELD: pumps.SUBSTANCE: invention relates to heat pumps. Heat pump system comprises a refrigerant circuit, a compressor, an evaporator and a controller programmed to defrost the evaporator in the first defrost mode. In the first defrosting mode, the controller is programmed to track the evaporator to detect frost on it and reduce the compressor speed and/or reduce the number of several, but not all operating compressors when there is frost on the evaporator. Controller is additionally programmed to defrost the evaporator in the second defrosting mode, in which the controller is programmed to track the evaporator to detect the formation of frost on it, shutdown of at least one compressor if there is frost on the evaporator and activation of the fan to pump ambient air through the evaporator to defrost the evaporator.EFFECT: technical result is to ensure defrosting without the use of a reverse cycle of the refrigerant circuit and the reduction or prevention of cooling of the heat exchange circuit during the defrost cycle.15 cl, 5 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 672 995 C1 (51) МПК F25B 47/02 (2006.01) F25B 30/02 (2006.01) F25B 49/02 (2006.01) F25B 1/10 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК F25B 47/022 (2006.01); F25B 30/02 (2006.01); F25B 49/02 (2006.01); F25B 1/10 (2006.01) (21)(22) Заявка: 2017117893, 24.11.2014 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): КЭРРИЕР КОРПОРЕЙШН (US) Дата регистрации: 21.11.2018 2009158612 A2, 30.12.2009. RU 2480684 C2, 27.04.2013. EP 2784414 A1, 01.10.2014. WO 2014098724 A1, 26.06.2014. EP 2402686 A1, 04.01.2012. (45) Опубликовано: 21.11.2018 Бюл. № 33 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 26.06.2017 (86) Заявка PCT: IB 2014/002733 (24.11.2014) 2 6 7 2 9 9 5 (56) Список документов, цитированных в отчете о поиске: JP 2014013122 A, 23.01.2014. WO Приоритет(ы): (22) Дата подачи заявки: 24.11.2014 R U ...

Defrosting control method for air conditioner

本发明属于空调器技术领域，具体涉及一种空调器除霜控制方法。为了提高空调器的除霜效率，本发明提出的空调器除霜控制方法针对具有旁通除霜回路的空调器，所述方法包括下列步骤：当空调器需要进入除霜模式时，控制室外风机停止转动，并开启旁通除霜回路；在室外风机停止转动第一设定时间后，控制室外风机反转第二设定时间；当室外风机反转第二设定时间之后，根据t 上 、t 中 和t 下 中的至少一个选择性地控制室外风机再反转第二设定时间；当室外风机反转时，关闭旁通除霜回路，并在室外风机反转第二设定时间之后，再经过时间t开启旁通除霜回路；时间t根据室内温度确定。本发明可以更精确地控制室外风机的反转时机，极大地提升空调器的除霜效率。

Apparatus for and operation of a liquid flow circuit containing a chemical additive

A liquid flow system (10) comprises a dosing device (18) for introduction of a chemical additive into a liquid flow circuit, said dosing device comprising an inlet port (25) in fluid communication with the liquid flow circuit and a container (30) of chemical additive secured or adapted to be secured to said inlet port, said container comprising a radio frequency identification (RFID) device (50,51) which stores data of a parameter related to the correct operation of the liquid flow circuit, and the system comprising a communication device (33) to receive data from the container whereby the liquid flow system is responsive to data received by the communication device.

Heat pump and its defrosting control method

本发明公开了一种热泵系统及其除霜控制方法。热泵系统包括：压缩机、四通阀、室外换热器、室内换热器、储液器和加热装置。四通阀具有A阀口、B阀口、C阀口和D阀口，A阀口与回气口相连，C阀口与排气口相连。室外换热器与B阀口相连，室内换热器与D阀口相连，室外换热器与室内换热器之间串联连接有节流元件。储液器串联连接在室外换热器和节流元件之间，加热装置用于加热储液器内冷媒。在除霜时四通阀控制C阀口与D阀口连通、A阀口与B阀口连通，加热装置运行加热。根据本发明的热泵系统，可以平衡室内外容积不一致引起的系统冷媒差异，且降低了室内侧除霜过程温度变化幅度，提高系统舒适性及除霜效率。

Conditioner

本发明提供一种空气调节装置，通过进行与设置条件对应的除霜运转控制，防止制热运转恢复的延迟。所述空气调节装置包括：至少1台室外机，其具有压缩机、流道切换单元、室外热交换器和室外机控制单元；至少1台室内机，其具有室内热交换器；以及至少1条液管和至少1条气管，连接所述室外机和所述室内机，所述空气调节装置的特征在于，所述室外机控制单元在前次的除霜运转结束后经过作为规定的时间的除霜运转间隔时间时，执行除霜运转，所述除霜运转间隔时间根据功率比，规定有多个时间，所述功率比是所述室内机的额定功率的总和除以所述室外机的额定功率的总和的值。

Progress control method, control device, air conditioner and computer readable storage medium

本发明提供了一种运行控制方法、运行控制装置、空调器和计算机可读存储介质，运行控制方法包括：所述空调器运行于制热模式，根据获取到的工况参数确定由所述制热模式切换至化霜模式或在所述制热模式中开启电辅热组件；在所述化霜模式中，控制四通阀维持导通方向不变，以及控制开启所述第一控制阀，以使所述第一旁通管路导通。通过本发明的技术方案，在检测到存在结霜风险但是未达到化霜条件的阶段，由于结霜的限制导致空调器的制热效果降低，因此可以先开启电辅热组件，以提升存在结霜风险的工况下的制热效果，进而提升室内机的出风温度与房间制热效果。

Control method and device for defrosting of air conditioner and air conditioner

本申请涉及空调除霜技术领域，公开一种用于空调除霜的控制方法。控制方法包括：在所述空调运行制热模式过程中，获取室内盘管温度、室外盘管温度以及室外换热器的上壳体温度；在根据所述室内盘管温度、所述室外盘管温度和所述上壳体温度确定满足除霜进入条件后，控制对所述空调的压缩机进行降频操作。该控制方法能够根据室内盘管温度、室外盘管温度以及室外换热器的上壳体温度对空调是否满足除霜进入条件的判断，提高对控制空调除霜的控制精度；并通过对压缩机的降频操作减少室外换热器与室外环境的换热量，改善室外换热器的结霜状况，以降低冰霜凝结对空调自身制热性能的不利影响。本申请还公开一种用于空调除霜的控制装置及空调。

Defroster for refrigerator

본 발명은 증발기 주변의 공기 중 수분이 증발기 표면에 응결된 서리를 제상히터에 의해 제거해주는 냉장고의 제상장치에 관한 것으로서, 특히 한 쌍의 증발기 및 각각에 제상히터를 구비하여 한 쌍의 증발기가 선택적으로 제상이 이루어지도록 하고, 한 쌍의 증발기 주변에 공기의 출입을 안내하는 유로가변수단을 구비하여 제상이 이루어지는 증발기에는 공기가 출입되지 못하게 하여 제상작용이 이루어지도록 하는 동시에 제상이 이루어지지 않는 증발기에는 공기가 출입되면서 냉각작용을 수행하도록 하기 때문에 효과적으로 제상이 이루어질 뿐 아니라 냉동실 및 냉장실의 온도가 급격하게 올라가는 현상을 방지할 수 있어 음식물 등을 장기간 신선하게 보관할 수 있다. The present invention relates to a defroster of a refrigerator that removes frost condensed on the surface of the evaporator by means of a defrost heater, and in particular, a pair of evaporators and a pair of evaporators, each of which includes a defrost heater. The defrosting is performed, and a flow path for guiding air in and around the pair of evaporators is provided with a variable stage so that the defrosting action is performed by preventing air from entering the evaporator in which defrosting is performed. As the air enters and performs the cooling operation, not only the defrosting is effectively performed, but also the temperature of the freezing compartment and the refrigerating compartment can be prevented from rapidly rising, so that food can be kept fresh for a long time. 냉장고, 냉동실, 냉장실, 증발기, 제상히터, 송풍장치, 냉매분배수단, 유로가변수단, 댐퍼 Refrigerator, freezer, refrigerating chamber, evaporator, defrost heater, blower, refrigerant distribution means, flow path variable stage, damper

Defrosting control method for fixed-frequency air conditioner

本发明属于空调器技术领域，具体涉及一种用于定频空调的除霜控制方法。为了提高定频空调的除霜效率，本发明提出的用于定频空调器的除霜控制方法包括下列步骤：在定频空调处于制热工况的情况下，每隔预设时间检测室内温度；根据所述室内温度的衰减速度判断是否使所述定频空调进入除霜模式。本申请创新性地利用室内温度变化趋势来表征外机结霜程度，并因此判断空调进入除霜模式的时机，避免定频空调频繁进入除霜，保证除霜效果，提高用户体验。

Control method and device, air-conditioning for air-conditioner defrosting

本申请涉及空调除霜技术领域，公开一种用于空调除霜的控制方法。控制方法包括：在空调需要进行除霜的情况下，控制增大空调的节流装置的流量开度；获得室外换热器的冷媒进液温度差值和室外换热器的预设位置温度；在冷媒进液温度差值和预设位置温度满足除霜退出条件的情况下，控制停止增大节流装置的流量开度。利用室外换热器的冷媒进液温度差值和预设位置温度这几个参数综合判断空调退出除霜的时机，从而可以有效提高对控制空调退出除霜的控制精度；并通过增大节流装置的流量开度改变冷媒循环回路中的冷媒温度和压力等，使最终流入室外换热器进行化霜的冷媒能够达到较好的化霜效果。本申请还公开一种用于空调除霜的控制装置及空调。

Air conditioner

본 발명은 공기조화기에 관한 것으로, 일 단은 실외열교환기의 중간지점에 연결되고 타 단은 압축기의 입구배관에 연결되는 제상 바이패스밸브와, 제상 바이패스배관에 배치되는 제상 바이패스밸브와, 실외열교환기의 냉매의 온도에 따라 제상 바이패스밸브를 개폐하는 프로세서를 포함하여, 제상운전 시작시 제상 바이패스밸브를 개방하여 실외열교환기의 냉매의 일부를 압축기의 입구배관으로 바이패스하고, 실외 열교환기의 냉매의 온도가 기준온도를 넘으면 제상 바이패스밸브를 폐쇄하여, 제상운전의 초기에 제상성능을 확보하는 공기조화기에 관한 발명이다.

Air conditioner, defrosting control method and defrosting control system

本发明提供了一种空调器、化霜控制方法和化霜控制系统，空调器包括：压缩机；室内换热器；室外换热器；四通阀；节流装置；蓄热组件，设置在四通阀和室外换热器之间，蓄热组件包括蓄热器、补水装置、电加热件、第一温度检测装置和第二温度检测装置；截止阀，设置在四通阀与室外换热器之间，与蓄热组件并联连接。本发明提供的空调器，蓄热组件使空调器在制热模式下进行化霜，保证良好的化霜效果和制热效果，提升用户使用的舒适度，在蓄热材料缺水化霜效果不良时，补水装置及时补水，四通阀换向使空调器在制冷模式下化霜，保证良好的化霜效果，在补水完毕后四通阀换向使空调器在制热模式下化霜，提高用户使用的舒适度。

Control method and device, air-conditioning for air-conditioner defrosting

本申请涉及空调除霜技术领域，公开一种用于空调除霜的控制方法。控制方法包括：在空调需要进行除霜的情况下，控制对流经空调的室外换热器的冷媒进液管路的冷媒加热；获得室外换热器的室外盘管温度、加热次数以及加热时长；在室外盘管温度、加热次数和除霜时间满足第一预设条件的情况下，控制空调进入逆循环除霜模式。利用室外换热器的室外盘管温度、加热次数以及加热时长这几个参数综合判断空调进入逆循环除霜模式的时机，提高对控制空调进入逆循环除霜模式的控制精度；并通过对流经冷媒进液管路的冷媒的加热操作，提高流入室外换热器的冷媒温度，利用冷媒热量融化凝结的冰霜。本申请还公开一种用于空调除霜的控制装置及空调。

Cooling system

본 발명은 별도의 열원없이 증발기를 제상할 수 있는 냉각시스템에 관한 것이다. The present invention relates to a cooling system capable of defrosting an evaporator without a separate heat source. 본 발명에 따른 냉각시스템은 냉매를 압축하는 압축기와, 냉매가 열을 방출하며 냉각되게 하는 응축기와, 냉매가 증발하며 제 1 공간이 냉각되게 하는 제 1 증발기와, 냉매가 증발하며 제 2 공간이 영하의 온도로 냉각되게 하는 제 2 증발기와, 압축기에서 토출된 냉매가 상기 응축기 및 제 1 증발기를 우회하여 제 2 증발기로 유입되도록 안내하는 바이패스냉매관을 포함한 것으로, 바이패스냉매관을 통해 압축기에서 토출된 고온의 냉매를 곧바로 제 2 증발기로 전달할 수 있게 되므로, 별도의 열원 없이 제 2 증발기의 제상을 수행할 수 있게 되는 작용효과가 있다. The cooling system according to the present invention includes a compressor for compressing a refrigerant, a condenser for releasing the heat and cooling the refrigerant, a first evaporator for allowing the refrigerant to evaporate and cooling the first space, and a second space for the refrigerant to evaporate. A second evaporator for cooling to a sub-zero temperature, and a bypass refrigerant pipe guiding the refrigerant discharged from the compressor to enter the second evaporator by bypassing the condenser and the first evaporator. Since the high-temperature refrigerant discharged from can be immediately transferred to the second evaporator, there is an effect that the defrost of the second evaporator can be performed without a separate heat source.

Defrost apparatus in refregerator

내용 없음. No content.

Defrosting control method for air conditioner

本发明属于空调器技术领域，具体涉及一种空调器除霜控制方法。为了提高空调器的除霜效率，本发明提出的空调器除霜控制方法针对具有旁通除霜回路的空调器，该方法包括下列步骤：当空调器需要进入除霜模式时，获取空调器的外盘管温度Toil；根据Toil选择性地使空调器进入旁通除霜模式或逆循环除霜模式；当空调器进入旁通除霜模式时，间隔性地控制旁通除霜回路开启/关闭，并在旁通除霜回路关闭的状态下，控制室外风机反转设定时间；旁通除霜回路的开启时间和设定时间根据t 上 、t 中 、t 下 确定。本发明可以准确地选择最佳除霜模式，以及高效地吹落融化的霜层，从而极大地提升了空调器的除霜效率。

Control method for inhibiting frosting of air conditioner

本发明属于空调器技术领域，具体涉及一种空调器抑制结霜控制方法。为了有效抑制空调器的结霜速度，本发明提出的空调器抑制结霜控制方法包括下列步骤：检测空调器室外风机的电流值；根据所述室外风机的电流值控制室外风机的转速。本发明主要利用室外风机的电流值来控制室外风机的转速，在保证空调器制热运行效率的前提下，尽可能延缓空调器的结霜速度，从而减少除霜次数，降低对室内温度造成的影响。尤其是，通过比较室外风机的实时电流值与标准电流值的大小，判断室外风机电流的增长趋势，根据室外风机电流的增长趋势可以更准确地判断室外机结霜的可能性以及结霜的速度，从而适应性地调整室外风机的转速，有效减缓空调器的结霜速度。

Module combined type air conditioning system and defrosting control method

本发明公开了一种模块组合式空调系统及除霜控制方法，包括多联室内机和至少两个室外机模块，室外机模块包括压缩机，压缩机排气口通过单向阀分别与第一四通阀和第二四通阀的D口连接，第一四通阀的E口通过气管连接到多联室内机，第二四通阀的C口连接到冷凝器组件的进口，冷凝器组件的出口通过电子膨胀阀以及液管连接到多联室内机；压缩机的吸气口通过气液分离器分别与第一四通阀和第二四通阀的S口连接，第一四通阀的C口通过第一毛细管和第一电磁阀连接到连接管上，第二四通阀的E口通过第二毛细管和第二电磁阀连接到连接管上。本发明不需停机换向，维持室内正常制热也能进行除霜，显著提高了用户的舒适性和能源利用效率，降低了除霜能耗。

Air conditioner defrosting system, air conditioner and air conditioner defrosting and heat recovery method

本发明涉及空调器技术领域，提供一种空调器除霜系统、空调器、空调器除霜和热回收方法。其中，空调器除霜系统，包括换热水管道、水泵、生活热水水箱、蓄热水箱和控制器；所述生活热水水箱通过第一开关阀和所述换热水管道的进水口连接，所述蓄热水箱通过第二开关阀和所述换热水管道的出水口连接，且所述换热水管道、蓄热水箱、生活热水水箱和水泵连接形成第一水循环通路；所述控制器用于监控空调器的运行状态，并根据运行状态控制所述水泵的启停，以及所述第一开关阀、第二开关阀的通断。该空调器除霜系统可在空调器低温制热时辅助化霜，使得空调器室外换热器快速并彻底的实现化霜，进而提高空调器的制暖性能。

Defrosting system and method utilizing four-way reversing valve control hot-gas reversing defrosting mode and electric heating tube defrosting mode for air-cooled refrigerator

本发明提供了风冷冷柜四通换向阀控制热气换向及电热管化霜系统，包括压缩机，所述压缩机的高压管连接四通换向阀的上部高压入口，所述四通换向阀的下部左接口连接回气管，所述四通换向阀的下部中间接口连接压缩机的低压管，所述四通换向阀的下部右接口连接冷凝器，蒸发器一侧设置有风机，所述风机安装在风壳上，所述蒸发器内安装有数条电热管，所述蒸发器内安装有化霜探头，所述冷凝器连接干燥过滤器，所述干燥过滤器连接毛细管。化霜时间只要8~10分钟就能把‑22℃箱内温度的蒸发器化霜干净。这样能使蒸发器在化霜的换热能力更强，制冷效率更高，更好的节省电能和保证箱内食品安全。

Cooling system

본 발명은, 냉매를 압축시키는 압축기와, 압축기로부터 냉매를 제공받아 응축하는 응축기를 포함하는 냉동시스템에 관한 것으로서, 냉매관과 냉매관의 길이방향에 가로로 마련되는 복수의 핀을 가지며, 응축기에서 응축된 냉매를 증발시키는 제1 및 제2증발부를 갖는 증발기와; 응축기와 증발기의 냉매라인에 마련되어, 제1증발부와 제2증발부 중 어느 하나로의 냉매공급을 선택적으로 절환하는 절환밸브와; 절환밸브를 통해 제1증발부로 유입되는 냉매를 팽창시키며, 제2증발부의 적어도 일부영역에 제2증발부의 냉매관을 따라 외표면에 마련된 제1냉매팽창부와; 절환밸브를 통해 제2증발부로 유입되는 냉매를 팽창시키며, 제1증발부의 적어도 일부영역에 제1증발부의 냉매관을 따라 외표면에 마련된 제2냉매팽창부를 포함하고, 응축기로부터의 냉매가 절환밸브에 의해 제1냉매팽창부를 거쳐 제1증발부로 유입되는 제1순환과, 응축기로부터의 냉매가 절환밸브에 의해 제2냉매팽창부를 거쳐 제2증발부로 유입되는 제2순환 간의 전환이 가능하며, 제1순환 시 제2증발부는 제1냉매팽창부로부터의 열에 의해 제상되고, 제2순환 시 제1증발부는 제2냉매팽창부로부터의 열에 의해 제상되는 것을 특징으로 한다. 이에 의하여, 별도의 제상히터 없이도 증발기의 제상이 효율적으로 수행되어, 냉각성능이 향상되고, 소비전력이 감소된 냉동시스템이 제공된다. The present invention relates to a refrigeration system including a compressor for compressing a refrigerant, and a condenser for receiving and condensing a refrigerant from the compressor, the refrigerant system comprising a refrigerant pipe and a plurality of fins arranged horizontally in the longitudinal direction of the refrigerant pipe. An evaporator having first and second evaporators for evaporating the condensed refrigerant; A switching valve provided in the refrigerant line of the condenser and the evaporator and selectively switching the refrigerant supply to any one of the first evaporator and the second evaporator; A first refrigerant expansion unit which expands the refrigerant flowing into the first evaporation unit through the switching valve, and is provided on an outer surface of the second evaporation unit along at least a portion of the second evaporation unit along the refrigerant pipe; Expands the refrigerant flowing into the second evaporator through the switching valve, and includes a second refrigerant expander provided on an outer surface of the first evaporator along the refrigerant pipe of the first evaporator, and the refrigerant from the condenser It is possible to switch between the first circulation flowing into the first evaporator via the first refrigerant expansion and the ...

Evaporator of refrigerator

Air conditioning device

FIELD: air conditioning. SUBSTANCE: when the controller performs defrosting operation that melts frost on outdoor heat exchanger, the controller is configured to: perform first defrost control in which switch is set to the first state. After the controller performs the first defrost control, the second defrost is controlled in which the switch is set corresponding to the second state, and after the controller performs the second defrosting control, the third defrost control is carried out in which switching state of switching device is set corresponding to the first state. EFFECT: prevention from formation of thick frost layer and increase in efficiency of heating operation. 7 cl, 18 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 742 855 C1 (51) МПК F25B 47/02 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК F25B 47/02 (2020.08) (21)(22) Заявка: 2020127718, 26.01.2018 (24) Дата начала отсчета срока действия патента: Дата регистрации: 11.02.2021 (73) Патентообладатель(и): МИЦУБИСИ ЭЛЕКТРИК КОРПОРЕЙШН (JP) (45) Опубликовано: 11.02.2021 Бюл. № 5 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 26.08.2020 (56) Список документов, цитированных в отчете о поиске: RU 2638704 C2, 15.12.2017. JP 2008064381 A, 21.03.2008. JPH 0914816 A, 17.01.1997. JPH 1089817 A, 10.04.1998. RU 2620609 C2, 29.05.2017. (86) Заявка PCT: JP 2018/002475 (26.01.2018) 2 7 4 2 8 5 5 Приоритет(ы): (22) Дата подачи заявки: 26.01.2018 R U 26.01.2018 (72) Автор(ы): ТАСИРО, Юсуке (JP), ХАЯМАРУ, Ясухиде (JP), КОНДО, Масакадзу (JP), САТО, Масакадзу (JP), НАКАГАВА, Наоки (JP), КАВАСИМА, Ацуси (JP) 2 7 4 2 8 5 5 R U WO 2019/146071 (01.08.2019) Адрес для переписки: 129090, Москва, ул. Б.Спасская, 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" (54) УСТРОЙСТВО КОНДИЦИОНИРОВАНИЯ ВОЗДУХА (57) Реферат: Изобретение относится к устройству размораживанием, при котором состояние кондиционирования воздуха. Когда контроллер ...

Defrosting control method for air conditioner

本发明属于空调器技术领域，具体涉及一种空调器除霜控制方法。为了提高空调器的除霜效率，本发明提出的空调器除霜控制方法针对具有旁通除霜回路的空调器，该方法包括下列步骤：当空调器第n次进入除霜模式时，获取空调器的制热运行时间t n ；如果t n ＞t n‑1 ，则使所述空调器进入逆循环除霜模式，否则使所述空调器进入旁通除霜模式；其中，n为大于等于2的正整数，t n 为所述空调器在当前周期制热运行的时间，t n‑1 为所述空调器在上一周期制热运行的时间。本发明不仅可以准确地选择最佳除霜模式，还可以通过间隔性地控制室外风机反转，利用室外风机的反吹作用将霜层快速地吹落，以提高除霜效率。

High performance refrigerator having dual evaporators

一种高性能冰箱（10）包括：具有单一被冷却的内部空间（18）的柜体（12）和制冷流体回路（20），该制冷流体回路具有第一和第二蒸发器（32，34），该第一和第二蒸发器位于柜体（12）内，且通过相应的第一和第二蒸发器罩（76，78）与内部空间（18）隔开。冰箱（10）还包括控制第一蒸发器（32）与内部空间（18）之间的流动的第一风门（66）和控制第二蒸发器（34）与内部空间（18）之间的流动的第二风门（68）。控制器（50）控制冰箱（10），以使制冷流体回路（20）中的三通阀（28）在一个蒸发器需要除霜时将制冷剂仅引导到另一个蒸发器。两个蒸发器（32，34）可用于在初始冷却过程中或紧跟在柜体（12）打开之后从内部空间（18）去除热量。

Control method and device for defrosting of air conditioner and air conditioner

本申请涉及空调除霜技术领域，公开一种用于空调除霜的控制方法。控制方法包括：在空调需要进行除霜的情况下，控制对流经空调的室外换热器的冷媒进液管路和冷媒出液管路的冷媒加热；获得室外换热器的室外盘管温度和室外换热器的冷媒出液温度；在室外盘管温度和冷媒出液温度满足除霜退出条件的情况下，控制停止加热。利用室外换热器的盘管温度和冷媒出液温度这两个参数综合判断空调退出除霜的时机，从而可以有效提高对控制空调退出除霜的控制精度；并通过对流经冷媒进液管路和冷媒出液管路的冷媒的加热操作，降低冰霜凝结对空调自身制热性能的不利影响。本申请还公开一种用于空调除霜的控制装置及空调。

Refrigerant distributing device and parallel-flow heat exchanger

本发明公开了一种制冷剂分配装置和平行流换热器，制冷剂分配装置包括：第一管，第一管包括位于其第一端的分配段以及位于其第二端的非分配段，分配段的周壁上设有第一分配孔，非分配段上设有连通孔；和第二管，第二管的周壁上设有第二分配孔，第二管套设在非分配段外且非分配段的外壁与第二管的内壁之间形成腔室，非分配段上的连通孔邻近第二管的第二端设置，腔室通过连通孔与非分配段的内腔连通以便腔室内的制冷剂流动方向与第一管内的制冷剂流动方向相反。根据本发明实施例的制冷剂分配装置具有制冷剂分配均匀等优点，且能够降低平行流换热器芯体内的压降、避免平行流换热器局部结霜、提高平行流换热器的换热能力。

Control method and device for defrosting of air conditioner and air conditioner

本申请涉及空调除霜技术领域，公开一种用于空调除霜的控制方法。控制方法包括：在所述空调运行制热模式过程中，获取室外机的室外出风温度以及室外换热器的上壳体温度；在根据所述室外出风温度和所述上壳体温度确定满足除霜进入条件后，控制对流经所述空调的室外换热器的冷媒进液管路和冷媒出液管路的冷媒进行加热。该控制方法能够根据获取得到的室外机的室外出风温度以及室外换热器的上壳体温度对空调是否满足除霜进入条件的判断，提高对控制空调除霜的控制精度；并通过对流经冷媒进液管路和冷媒出液管路的冷媒的加热操作，提升制热效率，降低冰霜凝结对空调自身制热性能的不利影响。本申请还公开一种用于空调除霜的控制装置及空调。

Method of controlling refrigerator

냉장고의 제어 방법을 개시한다. 본 발명은 다수의 저장실을 구비하는 냉장고에서 각 저장실의 운전 상태를 고려하여 제상 운전을 실시함으로써 각 저장실의 제상 운전에 의해 냉장고의 냉각 효율이 떨어지는 것을 최소화하기 위한 냉장고의 제어 방법을 제공하는데 그 목적이 있다. 이와 같은 목적의 본 발명에 따른 냉장고의 제어 방법은, 다수의 저장실과, 다수의 저장실 각각의 제상을 위해 마련되는 다수의 히터를 구비하는 냉장고의 제어 방법에 있어서, 다수의 저장실 각각에 대해 제상이 필요한지를 판단하고; 제상이 필요하다고 판단되면 다수의 저장실 중에서 온도 대역이 유사한 저장실들만을 구분하여 일괄적으로 제상하도록 다수의 히터를 제어한다. A control method of a refrigerator is disclosed. The present invention provides a control method of a refrigerator for minimizing a decrease in cooling efficiency of a refrigerator due to defrosting operation of each storage room by performing a defrosting operation in consideration of an operation state of each storage room in a refrigerator having a plurality of storage rooms . A control method for a refrigerator according to the present invention for a refrigerator having a plurality of storage rooms and a plurality of heaters provided for defrosting each of the plurality of storage rooms, Determine if it is necessary; If it is determined that defrosting is necessary, a plurality of heaters are controlled to collectively defrost only the storage compartments having similar temperature ranges in the plurality of storage compartments.

Defrosting system based on air source heat pump

本发明公开了一种基于空气源热泵的除霜系统，包括压缩机、冷凝器、储液气液分离器、膨胀阀和蒸发器等。压缩机的出口分为两条支路，一路连接四通阀，一路连接储液器液分离器的热气进管；冷凝器的第二端口一路连接第一单向阀，一路经连接储液气液分离器的热气进管；压缩机的入口与储液气液分离器的吸气出管连接；四通阀分别连接蒸发器、储液气液分离器的吸气进管、压缩机的出口和冷凝器的第一端口。本发明通过储液器液分离器以及压缩机热气旁通这两种方式，控制制冷剂迁移，增大系统运行时制冷剂有效流量，从而改善空气源热泵系统性能，提高运行效率，防止压缩机液击，减缓压缩机停机时制冷剂迁移对系统的影响，延缓室外盘管结霜并缩短除霜时间。

Heat pump cooling and heating system having defrosting function

본 발명 히트펌프 냉난방시스템에 관한 것으로서, 보다 상세하게는 동절기 차가운 외기온도에 의해 서리나 성애의 발생을 방지하고, 서리나 성애가 발생시에도 제거가 가능한 제상기능을 갖는 히트펌프 냉난방시스템에 관한 것이다. 이를 위한 본 발명에 따른 제상기능을 갖는 히트펌프 냉난방시스템에 의하면, 압축기, 열교환기, 난방용팽창밸브 및 냉방용팽창밸브, 수액기, 응축기, 액분리기로 이루어진 히트펌프에 있어서, 상기 난방용팽창밸브와 냉방용팽창밸브는 사용용도에 따라 냉매의 흐름을 선택적으로 유도하기 위하여 열교환기와 수액기 사이에 병열로 설치되고, 상기 열교환기와 난방용팽창밸브 사이에는 난방용팽창밸브를 통해 팽창된 냉매가 응축기를 통과시 서리의 발생을 방지하도록 열교환기를 통해 열교환된 냉매에 다시 열을 가하는 열재생기가 형성되되, 상기 열재생기는 압축기에서 배출되는 냉매의 일부가 열재생기의 내부로 유입되어 열이 축적되며, 열교환기를 통해 열교환된 냉매가 열재생기를 통과하며 열재생기 내부에 축적된 열에 의해 일정온도로 재가열되는 것을 특징으로 한다. The present invention relates to a heat pump air-conditioning system, and more particularly, to a heat pump air-conditioning system having a defrost function that prevents the occurrence of frost and defrost by the cold outside temperature in winter, and can be removed even when frost or defrost occurs. According to the heat pump heating and cooling system having a defrost function according to the present invention, in the heat pump consisting of a compressor, a heat exchanger, a heating expansion valve and a cooling expansion valve, a receiver, a condenser, a liquid separator, The expansion valve for heating and expansion valve for cooling is installed in parallel between the heat exchanger and the receiver to induce the flow of the refrigerant selectively according to the intended use, Between the heat exchanger and the expansion valve for heating is formed a heat regenerator for applying heat back to the refrigerant heat-exchanged through the heat exchanger to prevent the refrigerant expanded through the heating expansion valve to pass through the condenser, the heat regenerator in the compressor Part of the discharged refrigerant is introduced into the heat regenerator to accumulate heat, and the refrigerant heat-exchanged through the heat exchanger passes through the heat regenerator, and is reheated to a predetermined temperature by the heat accumulated in the heat regenerator.

Energy saving refrigeration and defrosting system through 3 stage condensation heat exchange

The present invention relates to an energy saving type refrigeration and defrosting system through three-stage condensation heat exchange. More specifically, the present invention condenses high temperature refrigerant gas condensation in the refrigeration system to a three-stage condensation heat cooling and heat exchange apparatus such as a tubular tube, a condensation heat refrigerating water tank and a brine tank to condense the refrigerant gas. Further, the present invention replaces a conventional gas-liquid separator function by warming the refrigerant gas discharged from brine and an evaporator by the heat of the condensation heat exchanged in the condensation heat refrigerating water tank and the brine tank.

Defrosting control method for air conditioner

本发明属于空调器技术领域，具体涉及一种空调器除霜控制方法。为了提高空调器的除霜效率，本发明提出的空调器除霜控制方法针对具有旁通除霜回路的空调器，该方法包括：当空调器需要进入除霜模式时，控制室外风机停止转动，并开启旁通除霜回路；在室外风机停止转动第一设定时间后，控制室外风机反转第二设定时间；当室外风机反转第二设定时间之后，根据t 上 、t 中 和t 下 中的至少一个选择性地控制室外风机再反转第二设定时间；当室外风机反转时，关闭旁通除霜回路，并在室外风机反转第二设定时间之后，再经过时间t开启旁通除霜回路；时间t根据室外风机的电流值I的范围确定。本发明可以精确地控制室外风机的反转时机，极大地提升空调器除霜效率。

REFRIGERATING MACHINE AND METHOD OF OPERATION FOR HER

1. Холодильная машина с компрессором (1), конденсатором (2) и испарителем (5), соединенными в холодильный контур, отличающаяся тем, что на пути хладагента от конденсатора (2) к испарителю (5) встроен запорный вентиль (3). ! 2. Холодильная машина по п.1, отличающаяся тем, что содержит контроллер (6), закрывающий запорный вентиль (3) при отключенном компрессоре (1) и открывающий запорный вентиль (3) при включенном компрессоре (1). ! 3. Холодильная машина по п.2, отличающаяся тем, что контроллер (6) настроен таким образом, чтобы можно было как открывать, так и не открывать запорный вентиль (3) при отключенном компрессоре (1). ! 4. Холодильная машина по п.2, отличающаяся тем, что контроллер (6) соединен с размещенным на испарителе (5) датчиком обледенения (8) и/или реле времени. ! 5. Холодильная машина по одному из пп.1-4, отличающаяся тем, что к испарителю (5) подсоединен электрический нагревательный элемент (9). ! 6. Холодильная машина по одному из пп.1-4, отличающаяся тем, что на пути хладагента от дроссельного вентиля (3) к испарителю (5) расположено сужение (4). ! 7. Бытовой холодильный аппарат с холодильной машиной по одному из предыдущих пунктов. ! 8. Способ эксплуатации холодильной машины по п.1, причем компрессор (1) работает с перерывами, отличающийся тем, что при отключении компрессора (1) запорный вентиль (3) закрывают, а при включении компрессора (1) запорный вентиль (3) открывают. ! 9. Способ по п.8, отличающийся тем, что для оттаивания испарителя (5) запорный вентиль (3) при отключенном компрессоре (1) как минимум временно открывают. ! 10. Способ по п.9, отличающийся тем, что оттаивание выполняют периодически. ! 11. Способ по п.10, отличающийся тем, что контролируют обле РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2009 105 681 (13) A (51) МПК F25B 41/04 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21), (22) Заявка: 2009105681/06, 07.08.2007 (71) Заявитель(и): БСХ БОШ УНД СИМЕНС ХАУСГЕРЕТЕ ...

Heat exchange system, air conditioning system and defrosting method

本发明公开了一种换热系统、空调系统及除霜方法；该换热系统包括主循环单元，所述主循环单元用于提供制冷模式和制热模式，所述主循环单元包括依次串联连接的压缩机、四通阀、第一换热器及第二换热器；及旁通除霜单元，所述旁通除霜单元用于连通所述压缩机和所述第二换热器，使所述压缩机排出的气体能够引进至所述第二换热器进行除霜，所述旁通除霜单元包括串联连接的加热器及控制阀，所述加热器用于对流经所述旁通除霜单元的气体进行加热，所述控制阀用于打开或关闭所述旁通除霜单元。该换热系统能够提高除霜效果，用户体验感佳及对压缩机损坏小的优点。

Heat pump system

본 발명에 따른 히트펌프 시스템은, 실외 열교환기를 통과하는 복수의 실외열교환유로들 중 적어도 일부를 제상용 유로로 교대로 선택하여 사용하고, 나머지 유로는 증발용 유로로 사용함으로써, 제상과 난방 운전을 동시에 수행할 수 있는 효과가 있다. 또한, 실외 열교환기를 통과하면서 제상 작용을 하고 나온 냉매를 교축시킨 후 다시 증발 작용에 사용함으로써, 구조가 간단하면서도 난방과 제상이 모두 가능한 이점이 있다. The heat pump system according to the present invention is characterized in that at least a part of the plurality of outdoor heat exchange passages passing through the outdoor heat exchanger is alternately selected and used as the defrosting flow path and the remaining flow path is used as the evaporation flow path, There is an effect that can be performed simultaneously. Further, there is an advantage in that both the heating and the defrosting are possible, while the structure is simple, by using the refrigerant passing through the outdoor heat exchanger, defrosting the refrigerant, and then using it for evaporation.

Defrost apparatus for heat exchanger

본 발명은 열교환기의 제상장치에 관한 것으로 보다 상세하게는 다수의 냉각핀이 구비되는 냉매관으로 구성된 열교환단위체를 고정판에 다단으로 분할 구성하고 분할공간에 제상히터가 위치되도록 함으로서 분할된 열교환부재의 제상효과를 증대시킬 수 있도록 한 냉장고 열교환기의 제상장치이다. 본 발명은 열교환기의 냉각핀이 구비되는 냉매관을 복수층으로 구성하되, 복수의 냉매관으로 구성되어 열교환단위체를 이루고, 이 열교환단위체와 또 다른 열교환단위체를 일정한 공간을 가지는 거리를 두고 구성되는 열교환기와, 상기 열교환기에 체결되는 제상 히터는 별도의 체결구성 없이 열교환기에 끼워맞춤되도록 복수단으로 절곡구성되고 절곡부가 열교환기의 열교환단위체 사이의 공간부에 위치되는 절곡형상을 이루는 제상히터로 구성하여 제상히터의 열이 열교환기 전체로 전달되어 제상효과를 증대하도록 함과 제상히터의 절곡형상에 의하여 열교환기에 끼워맞춤으로 체결되도록 함으로서 조립공정이 간단하도록 하려는 것이다. 열교환기, 냉각핀, 냉매관, 시즈히터, 제상히터

Control method of heat pump hot water unit

本发明提供了一种热泵热水机组控制方法，包括：确定热泵热水机组的输入功率函数P，P＝P(T 0 ,T c ,q v ,f c ,f w )，其中，T 0 为环境温度，T c 为热泵热水机组进水温度，q v 为水流量，f c 为压缩机运行频率，f w 为风机运行频率；根据热泵热水机组的工作状况对压缩机运行频率f c ，风机运行频率f w ，调频速率df以及开机关机顺序进行控制以减少热泵热水机组的输入功率变化。本发明能够在满足用户需求的前提下，尽可能的减少热泵热水机组的负荷突变，保证电网的安全稳定。

Refrigerated display cabinet

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Heat pump system and defrosting control method thereof

本发明公开了一种热泵系统及其除霜控制方法。热泵系统包括：压缩机、四通阀、室外换热器、室内换热器、储液器和加热装置。四通阀具有A阀口、B阀口、C阀口和D阀口，A阀口与回气口相连，C阀口与排气口相连。室外换热器与B阀口相连，室内换热器与D阀口相连，室外换热器与室内换热器之间串联连接有节流元件。储液器串联连接在室外换热器和节流元件之间，加热装置用于加热储液器内冷媒。在除霜时四通阀控制C阀口与D阀口连通、A阀口与B阀口连通，加热装置运行加热。根据本发明的热泵系统，可以平衡室内外容积不一致引起的系统冷媒差异，且降低了室内侧除霜过程温度变化幅度，提高系统舒适性及除霜效率。