CN116294350A - Refrigerator refrigeration and defrosting control system - Google Patents

Refrigerator refrigeration and defrosting control system Download PDF

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Publication number
CN116294350A
CN116294350A CN202211100630.7A CN202211100630A CN116294350A CN 116294350 A CN116294350 A CN 116294350A CN 202211100630 A CN202211100630 A CN 202211100630A CN 116294350 A CN116294350 A CN 116294350A
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CN
China
Prior art keywords
outlet
evaporator
flow path
inlet
electromagnetic valve
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Pending
Application number
CN202211100630.7A
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Chinese (zh)
Inventor
隋红军
滕焕杰
刘明
叶瑞堂
管卫琴
王珂
杜华东
刘海洋
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Aucma Co Ltd
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Aucma Co Ltd
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Filing date
Publication date
Application filed by Aucma Co Ltd filed Critical Aucma Co Ltd
Priority to CN202211100630.7A priority Critical patent/CN116294350A/en
Publication of CN116294350A publication Critical patent/CN116294350A/en
Pending legal-status Critical Current

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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
    • 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
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
    • 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
    • F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
    • 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
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/002—Defroster control
    • F25D21/004—Control mechanisms
    • 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
    • F25D23/00—General constructional features
    • F25D23/006—General constructional features for mounting refrigerating machinery components
    • 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
    • F25D29/00—Arrangement or mounting of control or safety devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Defrosting Systems (AREA)

Abstract

The invention discloses a refrigerating and defrosting control system of a refrigerator, which comprises a refrigerant flow path, wherein a compressor, a three-way electromagnetic valve, a condenser, a throttling device, a first evaporator, a first two-way electromagnetic valve, a second evaporator and a second two-way electromagnetic valve are arranged on the refrigerant flow path. By changing the circulation path of the refrigerant in the defrosting mode, the refrigerating is realized while defrosting, the defrosting efficiency is high, the energy consumption is low, and meanwhile, the food is effectively prevented from going bad.

Description

Refrigerator refrigeration and defrosting control system
Technical Field
The invention relates to the technical field of refrigerator control, in particular to a refrigerating and defrosting control system of a refrigerator.
Background
Along with the improvement of living standard, the requirements of people on low-temperature freezing of the refrigerator are higher, the refrigeration efficiency of the existing refrigerator refrigeration system is higher at a relatively low temperature, and when the temperature is further reduced, the refrigeration capacity and the efficiency are rapidly reduced, so that the application scene of larger refrigeration capacity can not be met. In addition, the existing air-cooled frostless refrigerator generally performs defrosting on an evaporator regularly through a heater, the compressor is closed in a defrosting mode, a refrigerator refrigerating system stops working, heat generated by the heating of the heater through electrifying is used for defrosting the evaporator, the heater generally needs a long time to finish defrosting of the evaporator, defrosting efficiency is low, energy consumption is high, and in the defrosting mode, the temperature in a refrigerating chamber is increased, and the risk of food deterioration exists. There is a need for improvements over the prior art.
Disclosure of Invention
The invention aims to provide a refrigerating and defrosting control system of a refrigerator, which aims to solve the problems of low refrigerating efficiency in a low-temperature mode, low defrosting efficiency in a defrosting mode and high energy consumption of the refrigerator in the prior art.
In order to achieve the above purpose, the technical solution adopted by the invention is as follows:
the refrigerating and defrosting control system of the refrigerator comprises a refrigerant flow path, wherein a compressor and a three-way electromagnetic valve are arranged on the refrigerant flow path, and a condenser, a throttling device, a first evaporator, a first double-pass electromagnetic valve, a second evaporator and a second double-pass electromagnetic valve are arranged on the refrigerant flow path;
the three-way electromagnetic valve is provided with a first inlet, a first outlet, a second outlet and a third outlet, the first two-way electromagnetic valve is provided with a second inlet, a fourth outlet and a fifth outlet, and the second two-way electromagnetic valve is provided with a third inlet, a sixth outlet and a seventh outlet;
the exhaust port of the compressor is connected with the first inlet;
the first outlet is sequentially connected with the condenser, the throttling device and the inlet end of the first evaporator, the outlet end of the first evaporator is connected with the second inlet, and the fourth outlet is connected with the air suction port of the compressor;
the fifth outlet is connected with the inlet end of the second evaporator, the outlet end of the second evaporator is connected with the third inlet, and the sixth outlet is connected with the air suction port of the compressor;
the second outlet is connected with the inlet end of the first evaporator;
the third outlet is connected with the inlet end of the second evaporator, and the seventh outlet is connected with the inlet end of the first evaporator.
Preferably, the system comprises a standard refrigeration mode, a cryogenic mode, a first evaporator defrost mode, a second evaporator defrost mode.
Preferably, in the standard refrigeration mode, the three-way electromagnetic valve controls the first flow path from the first inlet to the first outlet to be conducted, the first two-way electromagnetic valve controls the second flow path from the second inlet to the fourth outlet to be conducted, and the refrigerant sequentially passes through the compressor, the first flow path, the condenser, the throttling device, the first evaporator and the second flow path to form a refrigerant circulation loop.
Preferably, in the cryogenic mode, the three-way electromagnetic valve controls the first flow path from the first inlet to the first outlet to be conducted, the first two-way electromagnetic valve controls the third flow path from the second inlet to the fifth outlet to be conducted, the second two-way electromagnetic valve controls the fourth flow path from the third inlet to the sixth outlet to be conducted, and the refrigerant sequentially passes through the compressor, the first flow path, the condenser, the throttling device, the first evaporator, the third flow path, the second evaporator and the fourth flow path to form a refrigerant circulation loop.
Preferably, in the defrosting mode of the first evaporator, the three-way electromagnetic valve controls the fifth flow path from the first inlet to the second outlet to be communicated, the first two-way electromagnetic valve controls the third flow path from the second inlet to the fifth outlet to be communicated, the second two-way electromagnetic valve controls the fourth flow path from the third inlet to the sixth outlet to be communicated, and the refrigerant sequentially passes through the compressor, the fifth flow path, the first evaporator, the third flow path, the second evaporator and the fourth flow path to form a refrigerant circulation loop.
Preferably, in the defrosting mode of the second evaporator, the three-way electromagnetic valve controls the sixth flow path from the first inlet to the third outlet to be conducted, the second double-way electromagnetic valve controls the seventh flow path from the third inlet to the seventh outlet to be conducted, the first double-way electromagnetic valve controls the second flow path from the second inlet to the fourth outlet to be conducted, and the refrigerant sequentially passes through the compressor, the sixth flow path, the second evaporator, the seventh flow path, the first evaporator and the second flow path to form a refrigerant circulation loop.
Preferably, the refrigerant is a mixed refrigerant.
Compared with the prior art, the invention has the following beneficial effects:
the refrigerating and defrosting control system of the refrigerator has four control modes, and the first evaporator and the second evaporator participate in refrigeration at the same time in a cryogenic mode, so that the refrigerating efficiency of the refrigerator is further improved, and low-temperature refrigeration is realized. By changing the circulation path of the refrigerant in the defrosting mode, the refrigerating is realized while defrosting, the defrosting efficiency is high, the energy consumption is low, and meanwhile, the food is effectively prevented from going bad.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of a control system of a refrigerator according to the present invention.
In the figure: 1. a compressor; 2. a three-way electromagnetic valve; 3. a condenser; 4. a throttle device; 5. a first evaporator; 6. a first two-way solenoid valve; 7. a second evaporator; 8. a second double-solenoid valve; a. a first inlet; b. a first outlet; c. a second outlet; d. a third outlet; e. a second inlet; f. a fourth outlet; g. a fifth outlet; h. a third inlet; i. a sixth outlet; j. and a seventh outlet.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1, a preferred embodiment of the present invention provides a refrigeration and defrosting control system for a refrigerator, which comprises a refrigerant flow path, wherein a compressor 1, a three-way electromagnetic valve 2, a condenser 3, a throttling device 4, a first evaporator 5, a first two-way electromagnetic valve 6, a second evaporator 7 and a second two-way electromagnetic valve 8 are arranged on the refrigerant flow path.
The three-way electromagnetic valve 2 is electrically connected with a control device of the refrigerator, and the control device controls the three-way electromagnetic valve 2 to perform corresponding switching actions, and specifically, the three-way electromagnetic valve 2 is provided with a first inlet a, a first outlet b, a second outlet c and a third outlet d.
The first double-pass electromagnetic valve 6 is electrically connected with a control device of the refrigerator, and the control device controls the first double-pass electromagnetic valve 6 to perform corresponding switching actions, and specifically, the first double-pass electromagnetic valve 6 is provided with a second inlet e, a fourth outlet f and a fifth outlet g.
The second double-solenoid valve 8 is electrically connected with a control device of the refrigerator, and the control device controls the second double-solenoid valve 8 to perform corresponding switching actions, specifically, the second double-solenoid valve 8 is provided with a third inlet h, a sixth outlet i and a seventh outlet j.
Wherein, each part on the refrigerant flow path is connected through a pipeline, and specifically, the exhaust port of the compressor 1 is connected with the first inlet a of the three-way electromagnetic valve 2.
The first outlet b of the three-way electromagnetic valve 2 is sequentially connected with the condenser 3, the throttling device 4 and the inlet end of the first evaporator 5, the outlet end of the first evaporator 5 is connected with the second inlet e of the first two-way electromagnetic valve 6, and the fourth outlet f of the first two-way electromagnetic valve 6 is connected with the air suction port of the compressor 1.
The fifth outlet g of the first double-pass electromagnetic valve 6 is connected with the inlet end of the second evaporator 7, the outlet end of the second evaporator 7 is connected with the third inlet h of the second double-pass electromagnetic valve 8, and the sixth outlet i of the second double-pass electromagnetic valve 8 is connected with the air suction port of the compressor 1.
The second outlet c of the three-way solenoid valve 2 is connected to the inlet end of the first evaporator 5.
The third outlet d of the three-way electromagnetic valve 2 is connected with the inlet end of the second evaporator 7, and the seventh outlet j of the second double-way electromagnetic valve 8 is connected with the inlet end of the first evaporator 5.
Further, the refrigerant in the refrigerant flow path is a mixed refrigerant.
The refrigerating and defrosting control system of the refrigerator comprises: standard cooling mode, cryogenic mode, first evaporator defrosting mode, second evaporator defrosting mode.
Wherein, under the standard refrigeration mode:
the compressor 1 is started, the three-way electromagnetic valve 2 controls the first flow path from the first inlet a to the first outlet b to be communicated, the first two-way electromagnetic valve 6 controls the second flow path from the second inlet e to the fourth outlet f to be communicated, and the refrigerant sequentially passes through the compressor 1, the first flow path, the condenser 3, the throttling device 4, the first evaporator 5 and the second flow path to form a refrigerant circulation loop.
In the deep cooling mode, a larger refrigerating capacity is needed:
the compressor 1 is started, the three-way electromagnetic valve 2 controls the first flow path from the first inlet a to the first outlet b to be communicated, the first two-way electromagnetic valve 6 controls the third flow path from the second inlet e to the fifth outlet g to be communicated, the second two-way electromagnetic valve 8 controls the fourth flow path from the third inlet h to the sixth outlet i to be communicated, and the refrigerant sequentially passes through the compressor 1, the first flow path, the condenser 3, the throttling device 4, the first evaporator 5, the third flow path, the second evaporator 7 and the fourth flow path to form a refrigerant circulation loop.
The first evaporator 5 and the second evaporator 7 participate in refrigeration simultaneously in the cryogenic mode, so that the refrigeration capacity is improved, and the refrigeration efficiency is further improved.
Wherein, under the first evaporator defrosting mode:
the compressor 1 is started, the three-way electromagnetic valve 2 controls the fifth flow path from the first inlet a to the second outlet c to be communicated, the first two-way electromagnetic valve 6 controls the third flow path from the second inlet e to the fifth outlet g to be communicated, the second two-way electromagnetic valve 8 controls the fourth flow path from the third inlet h to the sixth outlet i to be communicated, and the refrigerant sequentially passes through the compressor 1, the fifth flow path, the first evaporator 5, the third flow path, the second evaporator 7 and the fourth flow path to form a refrigerant circulation loop.
In the defrosting mode of the first evaporator, the high-temperature and high-pressure refrigerant discharged by the compressor 1 enters the first evaporator 5 to release heat, the defrosting purpose is achieved for the first evaporator 5, at the moment, the first evaporator 5 is equivalent to a condenser, and then the refrigerant enters the second evaporator 7 to absorb heat, so that the refrigerating effect is achieved. Compared with the traditional heater which is electrified to heat and defrost, the defrosting efficiency is high, the energy consumption is low, and refrigeration is considered while defrosting, so that food deterioration is effectively avoided.
Wherein, under the second evaporator defrosting mode:
the compressor 1 is started, the three-way electromagnetic valve 2 controls the conduction of a sixth flow path from the first inlet a to the third outlet d, the second double-way electromagnetic valve 8 controls the conduction of a seventh flow path from the third inlet h to the seventh outlet j, the first double-way electromagnetic valve 6 controls the conduction of a second flow path from the second inlet e to the fourth outlet f, and the refrigerant sequentially passes through the compressor 1, the sixth flow path, the second evaporator 7, the seventh flow path, the first evaporator 5 and the second flow path to form a refrigerant circulation loop.
In the defrosting mode of the second evaporator, the high-temperature and high-pressure refrigerant discharged by the compressor 1 enters the second evaporator 7 to release heat, the defrosting purpose is achieved for the second evaporator 7, at the moment, the second evaporator 7 is equivalent to a condenser, and then the refrigerant enters the first evaporator 5 to absorb heat, so that the refrigerating effect is achieved. Compared with the traditional heater which is electrified to heat and defrost, the defrosting efficiency is high, the energy consumption is low, and refrigeration is considered while defrosting, so that food deterioration is effectively avoided.
In summary, the refrigeration and defrosting control system for a refrigerator provided by the embodiment of the invention has four control modes, and in the deep cooling mode, the first evaporator and the second evaporator participate in refrigeration at the same time, so that the refrigeration efficiency of the refrigerator is further improved, and low-temperature refrigeration is realized. By changing the circulation path of the refrigerant in the defrosting mode, the refrigerating is realized while defrosting, the defrosting efficiency is high, the energy consumption is low, and meanwhile, the food is effectively prevented from going bad.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (7)

1. The refrigerating and defrosting control system of the refrigerator is characterized by comprising a refrigerant flow path, wherein a compressor, a three-way electromagnetic valve, a condenser, a throttling device, a first evaporator, a first two-way electromagnetic valve, a second evaporator and a second two-way electromagnetic valve are arranged on the refrigerant flow path;
the three-way electromagnetic valve is provided with a first inlet, a first outlet, a second outlet and a third outlet, the first two-way electromagnetic valve is provided with a second inlet, a fourth outlet and a fifth outlet, and the second two-way electromagnetic valve is provided with a third inlet, a sixth outlet and a seventh outlet;
the exhaust port of the compressor is connected with the first inlet;
the first outlet is sequentially connected with the condenser, the throttling device and the inlet end of the first evaporator, the outlet end of the first evaporator is connected with the second inlet, and the fourth outlet is connected with the air suction port of the compressor;
the fifth outlet is connected with the inlet end of the second evaporator, the outlet end of the second evaporator is connected with the third inlet, and the sixth outlet is connected with the air suction port of the compressor;
the second outlet is connected with the inlet end of the first evaporator;
the third outlet is connected with the inlet end of the second evaporator, and the seventh outlet is connected with the inlet end of the first evaporator.
2. The refrigeration and defrost control system of claim 1, wherein the system comprises a standard refrigeration mode, a deep refrigeration mode, a first evaporator defrost mode, and a second evaporator defrost mode.
3. The refrigeration and defrosting control system of claim 2 wherein in the standard refrigeration mode, the three-way solenoid valve controls the first flow path from the first inlet to the first outlet to be conducted, the first two-way solenoid valve controls the second flow path from the second inlet to the fourth outlet to be conducted, and the refrigerant sequentially passes through the compressor, the first flow path, the condenser, the throttling device, the first evaporator and the second flow path to form a refrigerant circulation loop.
4. The refrigeration and defrosting control system of claim 2 wherein in the deep cooling mode, the three-way solenoid valve controls the first flow path from the first inlet to the first outlet to be conducted, the first two-way solenoid valve controls the third flow path from the second inlet to the fifth outlet to be conducted, the second two-way solenoid valve controls the fourth flow path from the third inlet to the sixth outlet to be conducted, and the refrigerant sequentially passes through the compressor, the first flow path, the condenser, the throttling device, the first evaporator, the third flow path, the second evaporator and the fourth flow path to form a refrigerant circulation loop.
5. The refrigeration and defrosting control system of claim 2 wherein in the defrosting mode of the first evaporator, the three-way solenoid valve controls the fifth flow passage from the first inlet to the second outlet to be communicated, the first two-way solenoid valve controls the third flow passage from the second inlet to the fifth outlet to be communicated, the second two-way solenoid valve controls the fourth flow passage from the third inlet to the sixth outlet to be communicated, and the refrigerant sequentially passes through the compressor, the fifth flow passage, the first evaporator, the third flow passage, the second evaporator and the fourth flow passage to form a refrigerant circulation loop.
6. The refrigeration and defrosting control system of claim 2 wherein in the defrosting mode of the second evaporator, the three-way solenoid valve controls the sixth flow path from the first inlet to the third outlet to be conducted, the second double-way solenoid valve controls the seventh flow path from the third inlet to the seventh outlet to be conducted, the first double-way solenoid valve controls the second flow path from the second inlet to the fourth outlet to be conducted, and the refrigerant sequentially passes through the compressor, the sixth flow path, the second evaporator, the seventh flow path, the first evaporator and the second flow path to form a refrigerant circulation loop.
7. The refrigeration and defrosting control system of a refrigerator according to any one of claims 1 to 6, wherein the refrigerant is a mixed refrigerant.
CN202211100630.7A 2022-09-09 2022-09-09 Refrigerator refrigeration and defrosting control system Pending CN116294350A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211100630.7A CN116294350A (en) 2022-09-09 2022-09-09 Refrigerator refrigeration and defrosting control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211100630.7A CN116294350A (en) 2022-09-09 2022-09-09 Refrigerator refrigeration and defrosting control system

Publications (1)

Publication Number Publication Date
CN116294350A true CN116294350A (en) 2023-06-23

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ID=86789311

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211100630.7A Pending CN116294350A (en) 2022-09-09 2022-09-09 Refrigerator refrigeration and defrosting control system

Country Status (1)

Country Link
CN (1) CN116294350A (en)

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