A dual-cycle refrigerator refrigeration system and its control method

Abstract

The invention discloses a dual-cycle refrigerator refrigeration system and a control method thereof, and relates to the technical field of refrigerator refrigeration. The invention includes a refrigeration main circuit including a compressor, a condenser, a drying filter, an electric switching valve, a first capillary tube, a first refrigerating evaporator, a second refrigerating evaporator, a refrigerating evaporator and a compressor connected in sequence; refrigeration bypass The circuit includes a compressor, a condenser, a filter drier, an electric switching valve, a second capillary, a second freezer evaporator, a refrigerator evaporator, and a compressor connected in sequence. In the refrigeration system of the present invention, the freezing chamber is provided with the first freezing evaporator and the second freezing evaporator, which can adjust the cooling capacity of the freezing chamber, effectively solve the cooling capacity requirement of the freezing heat load, and reduce the freezing damage of the food caused by the zero temperature crossing at the bottom of the refrigerator. The problem.

Description

technical field [0001] The invention belongs to the technical field of refrigerator refrigeration, in particular to a dual-cycle refrigerator refrigeration system and a control method thereof. Background technique [0002] At present, direct-cooling dual-temperature refrigerators are generally designed with refrigerating and freezing evaporators connected in series, that is, a single-circulation loop. Usually, the temperature of the refrigerating compartment is controlled, and the temperature of the freezing compartment is determined by the size of the contact area between the refrigerating evaporator and the freezer compartment of the refrigerator. . The refrigerator with this structure is simple in structure, low in production cost, refrigerated and refrigerated at the same time, and has high refrigeration cycle efficiency. However, this kind of refrigeration system can easily lead to inaccurate temperature control in the freezer. In particular, the evaporator in the free...

AI Technical Summary

Problems solved by technology

However, after this improved system is used in the refrigeration coil evaporator system, it has relatively poor adaptability to the refrigeration heat load. When the freezer is loaded with a large heat load, the freezing and refrigeration will be connected in series, which will lead to a decrease in freezing and slow freezing or Cold room problem

Refrigeration is too cold, freezing food causes food waste, slow freezing speed affects food preservation effect, and is not good for user experience

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