CN105402979A - Novel refrigerator refrigerating system achieving non-azeotropic mixed refrigerant segregation circulation - Google Patents
Novel refrigerator refrigerating system achieving non-azeotropic mixed refrigerant segregation circulation Download PDFInfo
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- CN105402979A CN105402979A CN201510929109.8A CN201510929109A CN105402979A CN 105402979 A CN105402979 A CN 105402979A CN 201510929109 A CN201510929109 A CN 201510929109A CN 105402979 A CN105402979 A CN 105402979A
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- evaporator
- refrigerant
- liquid separator
- gas
- refrigeration
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Classifications
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- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
-
- 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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
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- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The invention relates to a novel refrigerator refrigerating system achieving non-azeotropic mixed refrigerant segregation circulation. An electronic adjusting valve is in parallel connection with a first condenser. One end of a parallel pipe is connected with an outlet of a compressor, and the other end of the parallel pipe is connected with an inlet of a gas-liquid separator. An outlet of the gas-liquid separator is divided into two paths, one path passes through a first heat regenerator, a refrigeration capillary tube and a refrigeration evaporator and then is connected with a suction pipe of the compressor, and the other path passes through a second condenser, a second heat regenerator, a freezing capillary tube and a freezing evaporator and then is connected with the suction pipe of the compressor. Non-azeotropic mixed refrigerant is adopted in the system. The opening degree of the electronic adjusting valve can be adjusted, and therefore the dryness of the refrigerant at the inlet of the gas-liquid separator is adjusted, the amount of the refrigerant entering the refrigeration evaporator and the freezing evaporator is distributed, and finally the refrigerating capacity of the refrigeration evaporator and the freezing evaporator is distributed and adjusted.
Description
Technical field
The invention belongs to refrigeration technology field, be specifically related to the new refrigerator refrigeration system of a kind of non-azeotropic mixed working medium fractional condensation circulation.
Background technology
Along with the living standard of people improves constantly, refrigerator enters huge numbers of families, becomes the household electrical appliance that Modern Family is indispensable.The freezer evaporator of conventional refrigerator, refrigerator evaporator are that series connection uses, usually compressor start-stop is controlled according to the temperature of refrigerating chamber, it is inaccurate that this structure can cause the temperature of refrigerating chamber to control, the thermodynamics irreversible loss of refrigerator evaporator is large, and cold distribution can not be carried out to refrigerating chamber, refrigerating chamber, such as under season in spring and autumn or certain situation, need the food of refrigeration more, the now more refrigerating capacity of the larger needs of refrigerating chamber load; And under summer or certain situation, when needing freezing food more, refrigerating chamber load is comparatively large, refrigerating chamber needs more refrigerating capacity.Common solution has refrigerating chamber, refrigerating chamber to adopt two to overlap independently kind of refrigeration cycle, but this can cause production cost excessive.For bypass Two-way Cycle refrigerator, its evaporating temperature is determined by freezer temperature, purpose of design wishes that refrigerating chamber and refrigerating chamber reach synchronous operation, the evaporating temperature of refrigerator evaporator most of the time is identical with freezing chamber evaporator temperature, the thermodynamics irreversible loss of refrigerating chamber evaporation refrigerator evaporator can be caused bigger than normal, and the start and stop of compressor are subject to the control of refrigerating chamber and refrigerating chamber simultaneously, control strategy is complicated, easily cause the frequent starting of compressor, increase power consumption.And when adopting the in parallel binary cycle system of refrigeration, refrigerating evaporator, evaporimeter parallel-connection structure is difficult to provide cold to refrigerating chamber, refrigerating chamber, causes temperature sometimes to control unstable simultaneously, and control strategy more complicated.
Summary of the invention
In order to solve the defect and deficiency that exist in above-mentioned prior art, the object of the present invention is to provide the new refrigerator refrigeration system that a kind of non-azeotropic mixed working medium fractional condensation circulates, this system adopts non-azeotropic mixed working medium, by regulating the mass dryness fraction entering mix refrigerant in gas-liquid separator, distribute the refrigerant flow of the outlet of gas-liquid separator gaseous refrigerant, liquid refrigerant outlet, wherein gaseous refrigerant exit cold-producing medium is rich in low boiling component cold-producing medium, and this place's mix refrigerant finally enters refrigerating evaporator; Gas-liquid separator liquid refrigerant outlet place cold-producing medium is rich in high boiling component cold-producing medium, and this place's mix refrigerant finally enters refrigeration evaporator; Final adjustable freezing refrigerating capacity and refrigeration amount within the specific limits.
For achieving the above object, the technical solution adopted in the present invention is:
A new refrigerator refrigeration system for non-azeotropic mixed working medium fractional condensation circulation, comprises compressor 101, electronic regulated valve 102, first condenser 103, gas-liquid separator 104, first regenerator 105, refrigeration capillary 106, refrigeration evaporator 107, second condenser 108, second regenerator 109, freezing capillary 110 and refrigerating evaporator 111; Described electronic regulated valve 102, first condenser 103 parallel join, one end of parallel pipeline exports with compressor 101 and is connected, and the other end is connected with gas-liquid separator 104 import; The outlet of described gas-liquid separator 104 is divided into two-way, and a road is connected with the air intake duct of compressor 101 after the first regenerator 105, refrigeration capillary 106, refrigeration evaporator 107; Another road is connected with compressor 101 air intake duct after the second condenser 108, second regenerator 109, freezing capillary 110, refrigerating evaporator 111.
The adjustable aperture of described electronic regulated valve 102, regulate the gaseous refrigerant agent flux by electronic regulated valve 102, and then regulate the cold-producing medium mass dryness fraction of gas-liquid separator 104 import department, regulate gas-liquid separator 104 exit liquid refrigerant flow, gaseous refrigerant agent flux, distribute the refrigerant amount entering refrigeration evaporator 107 and refrigerating evaporator 111, finally reach the object of distributing refrigeration evaporator 107 and refrigerating evaporator 111 refrigerating capacity within the specific limits.
Described new refrigerator refrigeration system adopts mixed non-azeotropic refrigerant.
Described mixed non-azeotropic refrigerant is that R290 and R600a mixes, and wherein R290 accounts for the mass percent of mix refrigerant is 20% ~ 80%; Be rich in low boiling component cold-producing medium R290 in the gaseous refrigerant outlet of described gas-liquid separator 104, and finally enter freezer evaporator 111; Be rich in high boiling component cold-producing medium R600a in the liquid refrigerant outlet of described gas-liquid separator 104, and finally enter refrigerator evaporator 107.
The backheat mode that described first regenerator 105 and the second regenerator 109 are taked is wound form, pastes and tie up formula or bushing type.
Compare tool of the present invention with traditional cooling cycle system of refrigerator to have the following advantages:
1. this new refrigerator refrigeration system can according to refrigerating chamber, refrigerating chamber payload, regulates electrical adjustment valve opening, and then regulates the mass dryness fraction entering cold-producing medium in gas-liquid separator, thus carries out the distribution of cold to refrigerating chamber, refrigerating chamber.
2. this new refrigerator refrigeration system has higher system energy efficiency, can promote cooling cycle system of refrigerator performance, reduce system power consumption, produce energy-conservation effect.
3. this new refrigerator refrigeration system improves overall refrigerating effect and the unit volume refrigerating capacity of system.
Present system is a kind of effective, feasible scheme, can effectively improve Refrigeration Cycle of Refrigerator systematic function, regulates the distribution of cold, promotes the development of family expenses and commercial refrigerator technology.
Accompanying drawing explanation
Fig. 1 is cooling cycle system schematic diagram of the present invention.
Fig. 2 is the pressure-enthalpy diagram (p-h figure) of the cooling cycle system course of work of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in Figure 1, the present invention is the new refrigerator refrigeration system of a kind of non-azeotropic mixed working medium fractional condensation circulation, comprises compressor 101, electronic regulated valve 102, first condenser 103, gas-liquid separator 104, first regenerator 105, refrigeration capillary 106, refrigeration evaporator 107, second condenser 108, second regenerator 109, freezing capillary 110 and refrigerating evaporator 111.Described compressor 101 outlet is connected with electronic regulated valve 102, first condenser 103; Described electronic regulated valve 102, first condenser 103 parallel join, one end of parallel pipeline exports with compressor 101 and is connected, and the other end is connected with gas-liquid separator 104 import; The outlet of described gas-liquid separator 104 is divided into two-way, and a road is connected with the air intake duct of compressor 101 after the first regenerator 105, refrigeration capillary 106, refrigeration evaporator 107; Another road is connected with compressor 101 air intake duct after the second condenser 108, second regenerator 109, freezing capillary 110, refrigerating evaporator 111.
As shown in Figure 2, for the circulation pressure-enthalpy diagram (p – h schemes) of the cooling cycle system course of work of the present invention, when the system is operating, the overheated gaseous refrigerant of HTHP (in figure 2 places) part that compressor 101 exports flows through electronic regulated valve 102, and another part releases heat after the first condenser 103 becomes saturated liquid refrigerant (in figure 3 places).Flow through the overheated gaseous refrigerant of HTHP of electronic regulated valve 102 and after the condensed refrigerant mixed of the first condenser 103, become the inlet condition (locating in figure) of gas-liquid separator 104 at 4, gas-liquid separator 104 has two outlets, one is saturated liquid refrigerant (in figure 4b point place) outlet, and another is saturated gaseous refrigerant (in figure 4d point place) outlet.
From gas-liquid separator 104 saturated liquid refrigerant (in figure 4b point) out through the first regenerator 105 to the heat release of refrigerating chamber air intake duct, become the cold-producing medium (in figure 5 places) of supercooled state, biphase gas and liquid flow cold-producing medium (in figure 6 places) is become after the throttling of refrigeration capillary 106, in refrigeration evaporator 107, heat absorption becomes saturated gaseous refrigerant (in figure 7 places), absorbs heat become superheat state cold-producing medium (in figure 8 places) through the first regenerator 105;
Heat is released through the second condenser 108 from gas-liquid separator 104 saturated gaseous refrigerant (in figure 4d point) out, become saturated liquid refrigerant (in figure 9 places), through and regenerator 109 to the heat release of refrigerating chamber air intake duct, become the cold-producing medium (in figure 10 places) of supercooled state, biphase gas and liquid flow cold-producing medium (in figure 11 places) is become after the throttling of freezing capillary 110, in refrigerating evaporator 111, evaporation endothermic completes refrigeration object, become saturated gaseous refrigerant (in figure 12 places), absorb heat through the first regenerator 105 and become superheat state cold-producing medium (in figure 13 places), the overheated gaseous refrigerant (in figure 8) flowed out from the first regenerator 105 and the and overheated gaseous refrigerant (locating for 13 in figure) that regenerator 109 flows out becomes the superheated refrigerant (locating in figure) at compressor 101 air entry place at 1 after mixing, cold-producing medium enters compressor 101 afterwards, the refrigerating circuit cyclic process of completion system.
Described new refrigerator refrigeration system adopts mixed non-azeotropic refrigerant.As preferred embodiments of the present invention, the mixed non-azeotropic refrigerant that what described system adopted is R290 and R600a mixes by certain mass ratio (mass percent that wherein R290 accounts for mix refrigerant is 20% ~ 80%); Be rich in low boiling component cold-producing medium R290 in gaseous refrigerant (in the figure 4d point place) outlet of described gas-liquid separator 104, and finally enter freezer evaporator 111; Be rich in high boiling component cold-producing medium R600a in liquid refrigerant (in the figure 4b point place) outlet of described gas-liquid separator 104, and finally enter refrigerator evaporator 107.The mix refrigerant that described system adopts is not limited to R290, R600a cold-producing medium, and mixed non-azeotropic refrigerant can be mixed by a certain percentage by one or more other cold-producing mediums.
The adjustable aperture of described electronic regulated valve 102, thus regulate overheated gaseous refrigerant (in figure 2 places) flow by electronic regulated valve 102, and then the mass dryness fraction of active adjustment gas-liquid separator 104 import department cold-producing medium (in figure 4 places), regulate liquid refrigerant (in figure 4b point place) flow, gaseous refrigerant (in figure 4d point place) flow, distribute the refrigerant amount entering refrigeration evaporator 107 and refrigerating evaporator 111, finally regulate the refrigerating capacity of refrigeration evaporator 107 and refrigerating evaporator 111 within the specific limits.
Claims (5)
1. a new refrigerator refrigeration system for non-azeotropic mixed working medium fractional condensation circulation, comprises compressor (101), electronic regulated valve (102), the first condenser (103), gas-liquid separator (104), the first regenerator (105), refrigeration capillary (106), refrigeration evaporator (107), the second condenser (108), the second regenerator (109), freezing capillary (110) and refrigerating evaporator (111); Described electronic regulated valve (102) and the first condenser (103) parallel join, one end of parallel pipeline exports with compressor (101) and is connected, and the other end is connected with gas-liquid separator (104) import; The outlet of described gas-liquid separator (104) is divided into two-way, and a road is connected with the air intake duct of compressor (101) after the first regenerator (105), refrigeration capillary (106), refrigeration evaporator (107); Another road is connected with compressor (101) air intake duct after the second condenser (108), the second regenerator (109), freezing capillary (110), refrigerating evaporator (111).
2. new refrigerator refrigeration system according to claim 1, it is characterized in that: described electronic regulated valve (102) adjustable aperture, thus regulate the overheated gaseous refrigerant agent flux by electronic regulated valve (102), and then the mass dryness fraction of active adjustment gas-liquid separator (104) import department cold-producing medium, regulate gas-liquid separator (104) exit liquid refrigerant flow and gaseous state refrigerant flow, distribute the refrigerant amount entering refrigeration evaporator (107) and refrigerating evaporator (111), finally make the refrigerating capacity of refrigeration evaporator (107) and refrigerating evaporator (111) adjustable within the specific limits.
3. new refrigerator refrigeration system according to claim 1, is characterized in that: described new refrigerator refrigeration system adopts mixed non-azeotropic refrigerant.
4. new refrigerator refrigeration system according to claim 3, is characterized in that: described mixed non-azeotropic refrigerant is that R290 and R600a mixes, and wherein R290 accounts for the mass percent of mix refrigerant is 20% ~ 80%; Be rich in low boiling component cold-producing medium R290 in the gaseous refrigerant outlet of described gas-liquid separator (104), and finally enter freezer evaporator (111); Be rich in high boiling component cold-producing medium R600a in the liquid refrigerant outlet of described gas-liquid separator (104), and finally enter refrigerator evaporator (107).
5. new refrigerator refrigeration system according to claim 1, is characterized in that: the backheat mode that described first regenerator (105) and the second regenerator (109) are taked is wound form, pastes and tie up formula or bushing type.
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| CN201510929109.8A CN105402979B (en) | 2015-12-12 | 2015-12-12 | A kind of new refrigerator refrigeration system of non-azeotropic mixed working medium fractional condensation circulation |
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| CN201510929109.8A CN105402979B (en) | 2015-12-12 | 2015-12-12 | A kind of new refrigerator refrigeration system of non-azeotropic mixed working medium fractional condensation circulation |
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| CN105402979B CN105402979B (en) | 2018-01-16 |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106225319A (en) * | 2016-07-27 | 2016-12-14 | 南京理工大学 | A kind of double evaporating temperatures refrigeration and heat pump air conditioner unit and the method for back-heating type non-azeotropic mixed working medium |
| CN106440444A (en) * | 2016-10-27 | 2017-02-22 | 青岛海尔特种电冰柜有限公司 | Multiple-temperature zone refrigeration circuit and multiple-temperature zone refrigeration device |
| CN106546026A (en) * | 2016-10-25 | 2017-03-29 | 西安交通大学 | Using the non-azeotropic mixed working medium fractional condensation Duel-temperature refrigeration cycle system of ejector potentiation |
| CN106546024A (en) * | 2016-10-27 | 2017-03-29 | 青岛海尔特种电冰柜有限公司 | Separating refrigerating device |
| CN107393205A (en) * | 2017-09-12 | 2017-11-24 | 深圳市英维克科技股份有限公司 | One kind dispatching cabinet |
| CN109140811A (en) * | 2018-10-11 | 2019-01-04 | 武汉巨力鼎兴冷链股份有限公司 | A kind of freezer circulatory system with high and low temperature refrigeration handoff functionality |
| CN109341124A (en) * | 2018-11-14 | 2019-02-15 | 珠海格力电器股份有限公司 | Mixed working medium double-temperature circulating system |
| CN109883077A (en) * | 2019-03-20 | 2019-06-14 | 合肥华凌股份有限公司 | Refrigeration system and refrigeration equipment |
| CN110108056A (en) * | 2019-04-30 | 2019-08-09 | 上海利正卫星应用技术有限公司 | The regulating device of refrigeration system |
| CN110793230A (en) * | 2019-10-30 | 2020-02-14 | 河南科技大学 | Large-temperature span high-temperature heat pump system |
| CN111059683A (en) * | 2019-12-03 | 2020-04-24 | 珠海格力电器股份有限公司 | Control method for preventing liquid impact of suction belt liquid of compressor and air conditioner |
| CN111076479A (en) * | 2019-12-05 | 2020-04-28 | 合肥晶弘电器有限公司 | Household refrigeration equipment for realizing ultralow-temperature storage by using non-azeotropic mixed refrigerant |
| CN112393452A (en) * | 2020-11-27 | 2021-02-23 | 珠海格力电器股份有限公司 | Refrigerator refrigerating system and operation method thereof |
| CN112856848A (en) * | 2021-03-08 | 2021-05-28 | 中国科学技术大学 | CO of multi-functional refrigeration mode2Combined cooling and power generation system |
| CN113531932A (en) * | 2021-03-22 | 2021-10-22 | 青岛海尔特种电冰柜有限公司 | Binary mixed working medium refrigerating system, refrigerating cabinet and control method of refrigerating cabinet |
| CN114207080A (en) * | 2019-08-21 | 2022-03-18 | Lg电子株式会社 | Non-azeotropic mixed refrigerant and refrigeration equipment using non-azeotropic mixed refrigerant |
| CN114719538A (en) * | 2022-04-20 | 2022-07-08 | 澳柯玛股份有限公司 | Refrigerator and operation method thereof |
| CN115111843A (en) * | 2022-06-27 | 2022-09-27 | 西安交通大学 | Coupled multi-temperature-zone refrigerating system |
| CN115164506A (en) * | 2022-06-06 | 2022-10-11 | 中科美菱低温科技股份有限公司 | Refrigeration control device and control method for ultra-low temperature refrigerator and refrigerator |
| CN115247918A (en) * | 2022-06-29 | 2022-10-28 | 宁波方太厨具有限公司 | Method for determining refrigerant charge amount of refrigerator |
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Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106225319A (en) * | 2016-07-27 | 2016-12-14 | 南京理工大学 | A kind of double evaporating temperatures refrigeration and heat pump air conditioner unit and the method for back-heating type non-azeotropic mixed working medium |
| CN106546026A (en) * | 2016-10-25 | 2017-03-29 | 西安交通大学 | Using the non-azeotropic mixed working medium fractional condensation Duel-temperature refrigeration cycle system of ejector potentiation |
| CN106546026B (en) * | 2016-10-25 | 2019-05-10 | 西安交通大学 | Duel-temperature refrigeration cycle system is segregated using the non-azeotropic mixed working medium of injector synergy |
| CN106440444A (en) * | 2016-10-27 | 2017-02-22 | 青岛海尔特种电冰柜有限公司 | Multiple-temperature zone refrigeration circuit and multiple-temperature zone refrigeration device |
| CN106546024A (en) * | 2016-10-27 | 2017-03-29 | 青岛海尔特种电冰柜有限公司 | Separating refrigerating device |
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| CN109341124A (en) * | 2018-11-14 | 2019-02-15 | 珠海格力电器股份有限公司 | Mixed working medium double-temperature circulating system |
| CN109883077A (en) * | 2019-03-20 | 2019-06-14 | 合肥华凌股份有限公司 | Refrigeration system and refrigeration equipment |
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| CN114207080A (en) * | 2019-08-21 | 2022-03-18 | Lg电子株式会社 | Non-azeotropic mixed refrigerant and refrigeration equipment using non-azeotropic mixed refrigerant |
| CN110793230A (en) * | 2019-10-30 | 2020-02-14 | 河南科技大学 | Large-temperature span high-temperature heat pump system |
| CN110793230B (en) * | 2019-10-30 | 2021-06-18 | 河南科技大学 | Large-temperature span high-temperature heat pump system |
| CN111059683B (en) * | 2019-12-03 | 2021-04-02 | 珠海格力电器股份有限公司 | Control method for preventing liquid impact of suction belt liquid of compressor and air conditioner |
| CN111059683A (en) * | 2019-12-03 | 2020-04-24 | 珠海格力电器股份有限公司 | Control method for preventing liquid impact of suction belt liquid of compressor and air conditioner |
| CN111076479A (en) * | 2019-12-05 | 2020-04-28 | 合肥晶弘电器有限公司 | Household refrigeration equipment for realizing ultralow-temperature storage by using non-azeotropic mixed refrigerant |
| CN112393452A (en) * | 2020-11-27 | 2021-02-23 | 珠海格力电器股份有限公司 | Refrigerator refrigerating system and operation method thereof |
| CN112856848A (en) * | 2021-03-08 | 2021-05-28 | 中国科学技术大学 | CO of multi-functional refrigeration mode2Combined cooling and power generation system |
| CN113531932A (en) * | 2021-03-22 | 2021-10-22 | 青岛海尔特种电冰柜有限公司 | Binary mixed working medium refrigerating system, refrigerating cabinet and control method of refrigerating cabinet |
| CN114719538A (en) * | 2022-04-20 | 2022-07-08 | 澳柯玛股份有限公司 | Refrigerator and operation method thereof |
| CN115164506A (en) * | 2022-06-06 | 2022-10-11 | 中科美菱低温科技股份有限公司 | Refrigeration control device and control method for ultra-low temperature refrigerator and refrigerator |
| CN115164506B (en) * | 2022-06-06 | 2024-05-28 | 中科美菱低温科技股份有限公司 | Ultralow temperature refrigerator refrigeration control device, control method and refrigerator |
| CN115111843A (en) * | 2022-06-27 | 2022-09-27 | 西安交通大学 | Coupled multi-temperature-zone refrigerating system |
| CN115247918A (en) * | 2022-06-29 | 2022-10-28 | 宁波方太厨具有限公司 | Method for determining refrigerant charge amount of refrigerator |
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