Series-parallel connection dual-evaporator refrigeration system, refrigerator provided with such system and control method

Abstract

The invention discloses a series-parallel connection dual-evaporator refrigeration system which comprises a freezing refrigeration component and a cold storage refrigeration component, wherein the cold storage refrigeration component is internally provided with a vapor-liquid separator and a first electronic expansion valve, in the refrigeration process of a refrigerator, if a refrigerant needs to pass through a cold storage evaporator and a freezing evaporator simultaneously, the refrigerant enters the freezing evaporator after processed by the vapor-liquid separator and the first electronic expansion valve, and the refrigerant, after processed, can reach relatively low evaporating temperature in the freezing evaporator to make the refrigeration system able to maintain relatively low temperature inside the freezing chamber while realizing the process of internal refrigeration in the cold storage chamber simultaneously, without generating a negative effect on the interior of the freezing chamber.

Description

technical field [0001] The invention relates to the field of household appliances, in particular to a series-parallel double evaporator refrigeration system, a refrigerator with the system and a control method. Background technique [0002] Refrigeration System Reference of Serial and Parallel Double Evaporators for Traditional Refrigerators figure 1 As shown, it includes a compressor 11, a condenser 12, an electromagnetic three-way valve 13, a refrigerating chamber capillary 141, a freezing chamber capillary 142, a refrigerating chamber evaporator 151, a freezing chamber evaporator 152, a refrigerating fan 161 and a refrigerating fan 162. Refer to the specific connection method figure 1 As shown, the direction of the refrigerant during cooling in the refrigerator compartment is: compressor 11→condenser 12→electromagnetic three-way valve 13→capillary tube 141 in the refrigerator compartment→refrigeration evaporator 151→freezing evaporator 152→compressor 11; The direction o...

AI Technical Summary

Problems solved by technology

[0004] When the refrigerator is in normal use, the characteristic temperature of the refrigerating chamber is 5°C, and the characteristic temperature of the freezing chamber is -18°C. When the refrigerator is refrigerated with the above series-parallel double evaporator refrigeration system, there are the following problems: During the internal cooling process of the refrigerating chamber, the refrigerating chamber evaporates The temperature of the refrigerator 151 is relatively close to the temperature of the refrigeration evaporator 152 (generally, the refrigeration evaporator 151 is 2~3°C higher than the refrigeration evaporator 152). The temperature of the evaporator 151 is as close to 0°C as possible, which will cause the temperature of the freezing evaporator 152 to be higher than the characteristic temperature of freezing, which will have a negative impact on the freezing compartment; , it is necessary to reduce the evaporation temperature of the refrigeration evaporator 151 to keep it at -20°C, which is not conducive to the preservation of food in the refrigerator

[0005] In the prior art, in order to make the evaporation temperature of the refrigerating evaporator 151 as high as possible during cooling in the refrigerating chamber without causing too much impact on the freezing chamber, the temperature of the refrigerating evaporator 151 is generally controlled at about -15°C. The temperature of the freezing evaporator 152 is about -18°C, and the freezing and evaporating temperature of -18°C cannot meet the cooling demand of the freezing chamber

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