Quick freezer with hot gas defrosting function

Abstract

The invention discloses a quick freezer with a hot gas defrosting function. A medium-cooling electromagnetic valve, a refrigeration electromagnetic valve and a defrosting electromagnetic valve are arranged in the quick freezer, the medium-cooling electromagnetic valve controls on-off of refrigerant circulation in a super-cooling pipeline, the refrigeration electromagnetic valve controls on-off ofrefrigerant circulation in a liquid supply pipeline, and the defrosting electromagnetic valve controls on-off of refrigerant circulation in a defrosting pipeline. In the quick freezer, a condenser condenses a gaseous refrigerant into a liquid state through air exchange, a liquid storage device stores the refrigerant, and an expansion valve throttles and depressurizes the high-pressure liquid refrigerant to become a low-pressure gas-liquid mixture. An upper evaporator enables the refrigerant to exchange heat with air to continuously reduce the temperature of the air around the evaporator, and alower evaporator enables the refrigerant to exchange heat with the air to continuously reduce the temperature of the air around the evaporator. Through the design, a compressor liquid impact fault ofa refrigeration system can be avoided during defrosting of the quick freezer.

Description

technical field [0001] The invention belongs to the technical field of plasma freezing, and in particular relates to a quick-freezing machine with the function of hot gas defrosting. Background technique [0002] The installation pipelines of split quick-freezers are of different lengths. The quick-freezer may directly switch to frost mode after cooling. Since the refrigerant in the upper evaporator and lower evaporator is not completely evaporated, if the high-pressure hot gas of the defrosting solenoid valve directly enters the upper evaporator during defrosting , the lower evaporator, so that the evaporator passes through the gas-liquid separator and the unevaporated liquid in the suction pressure regulating valve directly enters the compressor for suction. There is no evaporation space for the refrigerant in the compressor, and the liquid refrigerant is directly sucked into the low-pressure stage of the two-stage compressor. Suction valve plate, since the compressor can ...

AI Technical Summary

Problems solved by technology

[0002] The installation pipelines of split quick-freezers are of different lengths. The quick-freezer may directly switch to frost mode after cooling. Since the refrigerant in the upper evaporator and lower evaporator is not completely evaporated, if the high-pressure hot gas of the defrosting solenoid valve directly enters the upper evaporator during defrosting , the lower evaporator, so that the evaporator passes through the gas-liquid separator and the unevaporated liquid in the suction pressure regulating valve directly enters the compressor for suction. There is no evaporation space for the refrigerant in the compressor, and the liquid refrigerant is directly sucked into the low-pressure stage of the two-stage compressor. Suction valve plate, since the compressor can only compress gas, the liquid entering the suction cavity will deform or break the compressor suction valve plate

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