CN104879975A - Hot-gas bypass and phase change heat storage combined defrosting system applied to refrigerator - Google Patents
Hot-gas bypass and phase change heat storage combined defrosting system applied to refrigerator Download PDFInfo
- Publication number
- CN104879975A CN104879975A CN201510329005.3A CN201510329005A CN104879975A CN 104879975 A CN104879975 A CN 104879975A CN 201510329005 A CN201510329005 A CN 201510329005A CN 104879975 A CN104879975 A CN 104879975A
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- Prior art keywords
- compressor
- refrigerant
- evaporimeter
- phase
- solenoid valve
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
- F25B47/022—Defrosting cycles hot gas defrosting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2347/00—Details for preventing or removing deposits or corrosion
- F25B2347/02—Details of defrosting cycles
Abstract
The invention provides a hot-gas bypass and phase change heat storage combined defrosting system applied to a refrigerator. A phase change heat storage bag is arranged between an outlet pipe section of a compressor and a condenser; one end of a refrigerant overheat bypass pipe is mounted at an inlet pipe section of the compressor, and the other end of the refrigerator overheat bypass pipe is mounted on a refrigerant pipeline between an evaporator and a normally-open electromagnetic valve; the outlet pipe section of the compressor and the refrigerant overheat bypass pipe are wrapped with the phase change heat storage bag; the phase change heat storage bag contains a phase change material suitable for the exhaust temperature of the compressor; a hot-gas bypass pipe is connected between an outlet of the compressor and an inlet of the evaporator, and a normally-closed electromagnetic valve a is mounted in the middle of the hot-gas bypass pipe; a normally-closed electromagnetic valve b is mounted in the middle of the refrigerant overheat bypass pipe; the normally-open electromagnetic valve is mounted in the middle of the refrigerant pipeline between an outlet of the evaporator and an inlet of the compressor. Exhaust waste heat of the compressor is recycled and stored in a phase change latent heat manner for defrosting, and the defrosting system accords with the concept of energy conservation.
Description
Technical field
The present invention relates to a kind of refrigeration system with defrost function, belong to refrigeration for refrigerator technical field.
Background technology
The defrosting problem of refrigerator refrigeration system is the hot issue that refrigeration industry is paid close attention to always.In the process of refrigerator refrigeration system work, because evaporator surface temperature is lower, water vapour in its near surface air easily condenses into liquid and then forms frost layer at evaporator surface, along with the carrying out of time, frost layer is constantly formed and increases, and will strengthen the heat transfer resistance between evaporator surface and air, causes being declined by heat exchange amount between air and evaporimeter, thus affect refrigeration, increase power consumption.Thus, must defrost to refrigerator refrigeration system.
In order to solve the defrosting problem of refrigerator refrigeration system, a series of Defrost technology arises at the historic moment, and the present invention is exactly a kind of novel defrost system.Make the used heat of compressor outlet pipeline section and the work done during compression of compressor as the thermal source of Defrost technology, make high temperature refrigerant directly enter evaporimeter by by-pass line and defrost.In compressor Waste Heat Recovery, mainly utilize the feature of the suction heat release of phase-change material in phase transition process.Defrosting effect can be realized faster by utilizing this defrost system and embody the theory of energy-conserving and environment-protective, this difficult problem defrosted in refrigerator refrigeration system can be solved completely.
Summary of the invention
This novel Defrost technology is mainly used in compression-type refrigerating system, is in original compression-type refrigerating system, install phase-transition heat-storage bag, hot-gas bypass pipe, refrigerant superheat bypass pipe, two normally closed solenoid valves, normally open solenoid valves, is achieved.
Concrete connected mode as shown in Figure 1.A kind of hot-gas bypass associating phase-transition heat-storage defrost system being applied to refrigerator, general refrigeration system comprises compressor 1, condenser 3, throttling arrangement 4, evaporimeter 5, and compressor 1, condenser 3, throttling arrangement 4, evaporimeter 5 are mutual successively to be connected by refrigerant tubing.
Phase-transition heat-storage bag 2, hot-gas bypass pipe 8, refrigerant superheat bypass pipe 10, normally closed solenoid valve a7, normally closed solenoid valve b9, normally open solenoid valve 6 are installed in former refrigerator refrigeration system.
Phase-transition heat-storage bag 2 is arranged between the outlet pipe section of compressor 1 and condenser 3, and refrigerant superheat bypass pipe 10 one end is arranged on the entrance pipeline section of compressor 1, and the other end is arranged on the refrigerant tubing between evaporimeter 5 and normally open solenoid valve 6; Outlet pipe section and the refrigerant superheat bypass pipe 10 of compressor 1 are wrapped up by phase-transition heat-storage bag 2; The phase-change material of applicable compressor 1 delivery temperature is housed in phase-transition heat-storage bag 2; Hot-gas bypass pipe 8 is connected to the outlet of compressor 1 and the import department of evaporimeter, in the middle of hot-gas bypass pipe 8, install normally closed solenoid valve a7; The centre of refrigerant superheat bypass pipe 10 is provided with normally closed solenoid valve b9; Normally open solenoid valve 6 is arranged on connection evaporimeter 5 and exports in the middle of the refrigeration piping with compressor 1 import.
Under the condition that refrigerator normally works, phase-change material absorbs the heat of compressor outlet pipe section, and phase-change material becomes liquid state from solid-state, storing heat; When defrost stage cold-producing medium is by refrigerant superheat bypass pipe 10, absorbs the heat of liquid state phase change material, make cold-producing medium be in superheat state.
Compared with prior art, the present invention has following beneficial effect.
1, compressor air-discharging Waste Heat Recovery utilizes, and stores for defrost, have ideas of energy-saving by this heat by the form of latent heat of phase change.
2, compare simple hot gas bypass defrosting technology, the present invention entirely eliminated before cold-producing medium enters compressor and is condensed into liquid problem, ensures that compressor can not produce and wetly rushes phenomenon.
3, owing to making full use of the work done during compression of compressor air-discharging used heat and compressor, this novel Defrost technology can shorten defrosting time.
4, in evaporator defrost process, heat transmits from inside to outside, less to refrigeration space temperature profile effect, especially in refrigeration for refrigerator field, is conducive to the long-time preservation of food.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of this defrost system.
Fig. 2 is the structure reduced graph of this defrost system.
In figure: 1, compressor, 2, phase-transition heat-storage bag, 3, condenser, 4, throttling arrangement, 5, evaporimeter, 6, normally open solenoid valve, 7, normally closed solenoid valve a, 8, hot-gas bypass pipe, 9, normally closed solenoid valve b, 10, refrigerant superheat bypass pipe, 11, gas-liquid separator.
Detailed description of the invention
The state that refrigeration system is normally freezed: normally closed solenoid valve a7 closes, and normally closed solenoid valve b9 closes, and normally open solenoid valve 6 is opened, the low-pressure gaseous refrigerant flowed out from evaporimeter 5 enters in compressor 1, compressed rear low-pressure gaseous refrigerant and become high-temperature high-pressure state, when flowing through the outlet pipe section of compressor, the heat-storing material in phase-transition heat-storage bag 2 is heated, phase-change material becomes liquid state from solid-state after heating, by the form of latent heat of phase change, heat storage is got up, high-temperature high-pressure refrigerant enters subsequently in condenser 3 and carries out condensing heat-exchange, high temperature and high pressure gaseous refrigerant becomes high pressure liquid refrigerant, liquid refrigerant flow throttling device 4 carries out reducing pressure by regulating flow, the liquid refrigerant flowed out from throttling arrangement 4 becomes low-pressure state, enter evaporation endothermic in evaporimeter 5 subsequently, cold-producing medium becomes gaseous state from liquid state, and then enter compressor 1, so carry out kind of refrigeration cycle.
Defrosting duty: along with the prolongation of cooling time, can form frost layer at evaporimeter 5 outer surface, now normally closed solenoid valve a7 opens, and normally closed solenoid valve b9 opens, and normally open solenoid valve 6 cuts out; The high-temperature high-pressure refrigerant flowed out from compressor 1 enters evaporimeter by bypass pipe 8, the frost layer of high temperature refrigerant gas and evaporimeter 5 outer surface carries out heat exchange, make it dissolve, the flow of refrigerant flowed out from evaporimeter 5 subsequently carries out being heated being in superheat state through overheated bypass pipe 10 phase-transition heat-storage bag, then enter compressor 1, cold-producing medium like this carries out defrost cycle.
After defrosting terminates, normally closed solenoid valve a7 closes, and normally closed solenoid valve b9 closes, and normally open solenoid valve 6 is opened, and enters the normal refrigerating cycle state of evaporimeter 5.
Reduction procedure
Compressor 1, condenser 3, throttling arrangement 4, evaporimeter 5 are mutual successively to be connected by refrigerant tubing; Phase-transition heat-storage bag 2 is arranged between the outlet pipe section of compressor 1 and condenser 3; The outlet pipe section of compressor 1 is wrapped up by phase-transition heat-storage bag 2, and the phase-change material of applicable compressor 1 delivery temperature is housed in phase-transition heat-storage bag 2; Hot-gas bypass pipe 8 is connected to the import of condenser 3 and the import department of evaporimeter 5, in the middle of hot-gas bypass pipe 8, install normally closed solenoid valve a7; Gas-liquid separator 11 is connected between evaporimeter 5 with compressor 1.
1) mode of operation of reduction procedure
The state that refrigerator refrigeration system normally freezes: normally closed solenoid valve a7 closes, the low pressure refrigerant flowed out from evaporimeter 5 enters gas-liquid separator 11, liquid refrigerant is stayed in gas-liquid separator 11, gaseous refrigerant enters in compressor 1, compressed rear low-pressure gaseous refrigerant and become high-temperature high-pressure state, when flowing through the outlet pipe section of compressor 1, the heat-storing material in phase-transition heat-storage bag 2 is heated, phase-change material becomes liquid state from solid-state after heating, by the form of latent heat of phase change, heat storage is got up, high-temperature high-pressure refrigerant enters subsequently in condenser 3 and carries out condensing heat-exchange, high temperature and high pressure gaseous refrigerant becomes high pressure liquid refrigerant, liquid refrigerant flow throttling device 4 carries out reducing pressure by regulating flow, the liquid refrigerant flowed out from throttling arrangement becomes low-pressure state, enter evaporation endothermic in evaporimeter 5 subsequently, cold-producing medium becomes gaseous state from liquid state, and then enter compressor 1, so carry out kind of refrigeration cycle.
Defroster duty: along with the prolongation of cooling time, frost layer can be formed at evaporimeter 5 outer surface, now normally closed solenoid valve a7 opens, from compressor 1 flow out high-temperature high-pressure refrigerant first by being equipped with the pipeline section of phase-transition heat-storage bag 2, enter in evaporimeter by bypass pipe 8 again, the frost layer of high temperature refrigerant gas and evaporator external carries out heat exchange, make it dissolve, subsequently from evaporimeter flow out flow of refrigerant through gas-liquid separator 11, enter compressor 1 again, cold-producing medium like this carries out defrost cycle.
2) feature of reduction procedure
1, program structure is simple, and repacking is convenient, only need add bypass pipe, magnetic valve, a phase-transition heat-storage bag in original refrigerator refrigeration system.
2, the existence of gas-liquid separator is had can to avoid the liquid hit phenomenon of compressor.
3, along with the carrying out of defrost process, the delivery temperature of compressor can be more and more lower, and now phase-transition heat-storage bag will play the effect of supplemental heat source.
4, the defrosting time of the program former scheme of comparing is longer, and defrosting efficiency former scheme of comparing is lower.
Claims (4)
1. one kind is applied to the hot-gas bypass associating phase-transition heat-storage defrost system of refrigerator, it is characterized in that: this system comprises compressor (1), condenser (3), throttling arrangement (4), evaporimeter (5), phase-transition heat-storage bag (2), hot-gas bypass pipe (8), refrigerant superheat bypass pipe (10), normally closed solenoid valve a (7), normally closed solenoid valve b (9), normally open solenoid valve (6), compressor (1), condenser (3), throttling arrangement (4), evaporimeter (5) is mutual is successively connected by refrigerant tubing;
Phase-transition heat-storage bag (2) is arranged between the outlet pipe section of compressor (1) and condenser (3), refrigerant superheat bypass pipe (10) one end is arranged on the entrance pipeline section of compressor (1), and the other end is arranged on the refrigerant tubing between evaporimeter (5) and normally open solenoid valve (6); The outlet pipe section of compressor (1) and refrigerant superheat bypass pipe (10) are wrapped up by phase-transition heat-storage bag (2); The phase-change material of applicable compressor (1) delivery temperature is housed in phase-transition heat-storage bag (2); Hot-gas bypass pipe (8) is connected to the outlet of compressor (1) and the import department of evaporimeter, in the middle of hot-gas bypass pipe (8), install normally closed solenoid valve a (7); The centre of refrigerant superheat bypass pipe (10) is provided with normally closed solenoid valve b (9); Normally open solenoid valve (6) is arranged in the middle of the refrigeration piping of connection evaporimeter (5) outlet and compressor (1) import.
2. a kind of hot-gas bypass associating phase-transition heat-storage defrost system being applied to refrigerator according to claim 1, it is characterized in that: the state that refrigeration system is normally freezed, normally closed solenoid valve a (7) closes, normally closed solenoid valve b (9) closes, and normally open solenoid valve (6) is opened, the low-pressure gaseous refrigerant flowed out from evaporimeter (5) enters in compressor (1), compressed rear low-pressure gaseous refrigerant and become high-temperature high-pressure state, when flowing through the outlet pipe section of compressor, the heat-storing material in phase-transition heat-storage bag (2) is heated, phase-change material becomes liquid state from solid-state after heating, by the form of latent heat of phase change, heat storage is got up, high-temperature high-pressure refrigerant enters subsequently in condenser (3) and carries out condensing heat-exchange, high temperature and high pressure gaseous refrigerant becomes high pressure liquid refrigerant, liquid refrigerant flow throttling device (4) carries out reducing pressure by regulating flow, the liquid refrigerant flowed out from throttling arrangement (4) becomes low-pressure state, enter evaporation endothermic in evaporimeter (5) subsequently, cold-producing medium becomes gaseous state from liquid state, and then enter compressor (1), so carry out kind of refrigeration cycle,
Defrosting duty, along with the prolongation of cooling time, can form frost layer at evaporimeter (5) outer surface, now normally closed solenoid valve a (7) opens, and normally closed solenoid valve b (9) opens, and normally open solenoid valve (6) cuts out; The high-temperature high-pressure refrigerant flowed out from compressor (1) enters evaporimeter by bypass pipe (8), the frost layer of high temperature refrigerant gas and evaporimeter (5) outer surface carries out heat exchange, make it dissolve, the flow of refrigerant flowed out from evaporimeter (5) subsequently carries out being heated being in superheat state through overheated bypass pipe (10) phase-transition heat-storage bag, then enter compressor (1), cold-producing medium like this carries out defrost cycle;
After defrosting terminates, normally closed solenoid valve a (7) closes, and normally closed solenoid valve b (9) closes, and normally open solenoid valve (6) is opened, and enters the normal refrigerating cycle state of evaporimeter (5).
3. be applied to a reduction procedure for the hot-gas bypass associating phase-transition heat-storage defrost system of refrigerator, it is characterized in that:
Compressor (1), condenser (3), throttling arrangement (4), evaporimeter (5) is mutual is successively connected by refrigerant tubing; Phase-transition heat-storage bag (2) is arranged between the outlet pipe section of compressor (1) and condenser (3); The outlet pipe section of compressor (1) is wrapped up by phase-transition heat-storage bag 2, and the phase-change material of applicable compressor (1) delivery temperature is housed in phase-transition heat-storage bag (2); Hot-gas bypass pipe (8) is connected to the import of condenser (3) and the import department of evaporimeter (5), in the middle of hot-gas bypass pipe (8), install normally closed solenoid valve a (7); Gas-liquid separator (11) is connected between evaporimeter (5) with compressor (1).
4. a kind of reduction procedure being applied to the hot-gas bypass associating phase-transition heat-storage defrost system of refrigerator according to claim 3, the state that refrigeration system is normally freezed: normally closed solenoid valve a (7) closes, the low pressure refrigerant flowed out from evaporimeter (5) enters gas-liquid separator (11), liquid refrigerant is stayed in gas-liquid separator (11), gaseous refrigerant enters in compressor (1), compressed rear low-pressure gaseous refrigerant and become high-temperature high-pressure state, when flowing through the outlet pipe section of compressor (1), the heat-storing material in phase-transition heat-storage bag (2) is heated, phase-change material becomes liquid state from solid-state after heating, by the form of latent heat of phase change, heat storage is got up, high-temperature high-pressure refrigerant enters subsequently in condenser (3) and carries out condensing heat-exchange, high temperature and high pressure gaseous refrigerant becomes high pressure liquid refrigerant, liquid refrigerant flow throttling device (4) carries out reducing pressure by regulating flow, the liquid refrigerant flowed out from throttling arrangement becomes low-pressure state, enter evaporation endothermic in evaporimeter (5) subsequently, cold-producing medium becomes gaseous state from liquid state, and then enter compressor (1), so carry out kind of refrigeration cycle,
Defrosting duty: along with the prolongation of cooling time, frost layer can be formed at evaporimeter (5) outer surface, now normally closed solenoid valve a (7) opens, the high-temperature high-pressure refrigerant flowed out from compressor (1) is first by being equipped with the pipeline section of phase-transition heat-storage bag (2), enter in evaporimeter by bypass pipe (8) again, the frost layer of high temperature refrigerant gas and evaporator external carries out heat exchange, make it dissolve, subsequently from evaporimeter flow out flow of refrigerant through gas-liquid separator (11), enter compressor (1) again, cold-producing medium like this carries out defrost cycle.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510329005.3A CN104879975A (en) | 2015-06-15 | 2015-06-15 | Hot-gas bypass and phase change heat storage combined defrosting system applied to refrigerator |
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| CN201510329005.3A CN104879975A (en) | 2015-06-15 | 2015-06-15 | Hot-gas bypass and phase change heat storage combined defrosting system applied to refrigerator |
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| CN104879975A true CN104879975A (en) | 2015-09-02 |
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| CN201510329005.3A Pending CN104879975A (en) | 2015-06-15 | 2015-06-15 | Hot-gas bypass and phase change heat storage combined defrosting system applied to refrigerator |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105115208A (en) * | 2015-09-22 | 2015-12-02 | 陈志强 | Air source heat pump system provided with multiple user-side heat exchangers |
| CN105115207A (en) * | 2015-09-22 | 2015-12-02 | 苏州工业园区瀚科机器制造有限公司 | Double-loop heat accumulating and defrosting type heat pump |
| CN105509364A (en) * | 2016-02-02 | 2016-04-20 | 珠海格力电器股份有限公司 | Air conditioning system and jet superheating temperature regulation method |
| CN105571221A (en) * | 2015-12-21 | 2016-05-11 | 珠海格力电器股份有限公司 | Air conditioner system and control method of air conditioner system |
| CN105865132A (en) * | 2016-04-15 | 2016-08-17 | 合肥华凌股份有限公司 | Defrosting system, refrigerator and defrosting method |
| CN105890269A (en) * | 2016-04-15 | 2016-08-24 | 合肥华凌股份有限公司 | Circulating defrosting system, refrigerator and defrosting method |
| CN106288565A (en) * | 2016-10-31 | 2017-01-04 | 广东美的制冷设备有限公司 | Air-conditioning does not shut down defrosting system and method and air-conditioning |
| CN106766295A (en) * | 2016-12-08 | 2017-05-31 | 东莞信易电热机械有限公司 | A kind of cooling-water machine |
| CN106871298A (en) * | 2017-04-01 | 2017-06-20 | 青岛海尔空调器有限总公司 | The progress control method of air-conditioning refrigerator all-in-one |
| CN107702414A (en) * | 2017-11-16 | 2018-02-16 | 华北电力大学 | A kind of new refrigerator thermal storage defrosting system |
| CN108713942A (en) * | 2018-08-14 | 2018-10-30 | 浙江和利制冷设备有限公司 | A kind of portable cold drink displaying storage facilities |
| CN109269321A (en) * | 2018-09-30 | 2019-01-25 | 杭州三花家电热管理系统有限公司 | The heat-exchange system of heating component and the application heating component |
| CN110081635A (en) * | 2019-04-28 | 2019-08-02 | 上海理工大学 | Air source heat pump defrosting system with regenerative apparatus |
| CN111435047A (en) * | 2019-01-11 | 2020-07-21 | 青岛海尔智能技术研发有限公司 | Defrosting system and refrigerator |
| CN111720952A (en) * | 2019-03-21 | 2020-09-29 | 珠海格力电器股份有限公司 | Multi-fan air conditioner defrosting method and air conditioner |
| CN112781275A (en) * | 2020-12-30 | 2021-05-11 | 珠海格力电器股份有限公司 | Heat pump system, control method thereof, controller, and computer-readable storage medium |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105115208A (en) * | 2015-09-22 | 2015-12-02 | 陈志强 | Air source heat pump system provided with multiple user-side heat exchangers |
| CN105115207A (en) * | 2015-09-22 | 2015-12-02 | 苏州工业园区瀚科机器制造有限公司 | Double-loop heat accumulating and defrosting type heat pump |
| CN105571221A (en) * | 2015-12-21 | 2016-05-11 | 珠海格力电器股份有限公司 | Air conditioner system and control method of air conditioner system |
| CN105509364A (en) * | 2016-02-02 | 2016-04-20 | 珠海格力电器股份有限公司 | Air conditioning system and jet superheating temperature regulation method |
| CN105865132A (en) * | 2016-04-15 | 2016-08-17 | 合肥华凌股份有限公司 | Defrosting system, refrigerator and defrosting method |
| CN105890269A (en) * | 2016-04-15 | 2016-08-24 | 合肥华凌股份有限公司 | Circulating defrosting system, refrigerator and defrosting method |
| CN106288565A (en) * | 2016-10-31 | 2017-01-04 | 广东美的制冷设备有限公司 | Air-conditioning does not shut down defrosting system and method and air-conditioning |
| CN106766295A (en) * | 2016-12-08 | 2017-05-31 | 东莞信易电热机械有限公司 | A kind of cooling-water machine |
| CN106871298A (en) * | 2017-04-01 | 2017-06-20 | 青岛海尔空调器有限总公司 | The progress control method of air-conditioning refrigerator all-in-one |
| CN106871298B (en) * | 2017-04-01 | 2019-12-31 | 青岛海尔空调器有限总公司 | Operation control method of air conditioner and refrigerator integrated machine |
| CN107702414A (en) * | 2017-11-16 | 2018-02-16 | 华北电力大学 | A kind of new refrigerator thermal storage defrosting system |
| CN108713942A (en) * | 2018-08-14 | 2018-10-30 | 浙江和利制冷设备有限公司 | A kind of portable cold drink displaying storage facilities |
| CN109269321A (en) * | 2018-09-30 | 2019-01-25 | 杭州三花家电热管理系统有限公司 | The heat-exchange system of heating component and the application heating component |
| CN109269321B (en) * | 2018-09-30 | 2022-12-09 | 杭州三花微通道换热器有限公司 | Heating assembly and heat exchange system applying same |
| CN111435047A (en) * | 2019-01-11 | 2020-07-21 | 青岛海尔智能技术研发有限公司 | Defrosting system and refrigerator |
| CN111720952A (en) * | 2019-03-21 | 2020-09-29 | 珠海格力电器股份有限公司 | Multi-fan air conditioner defrosting method and air conditioner |
| CN110081635A (en) * | 2019-04-28 | 2019-08-02 | 上海理工大学 | Air source heat pump defrosting system with regenerative apparatus |
| CN112781275A (en) * | 2020-12-30 | 2021-05-11 | 珠海格力电器股份有限公司 | Heat pump system, control method thereof, controller, and computer-readable storage medium |
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