Refrigeration freezer with double-refrigeration loop of raising freezing function

Abstract

The invention is double refrigeration loops freezing and chill box which can upgrade the refrigeration ability. It includes a chill compressor, condenser, three-way electromagnetic valve, the first freezing capillary, the second freezing capillary, the freezing evaporator, a chill compressor, a chill condenser, a chill capillary, a chill evaporator, a subcooler, a temperature sensor, controller. In the freezing loop, there has two alternative refrigeration agent loops between the condenser and the evaporator through the three-way electromagnetic valve. When the cold quantity in the freezing chamber is enough, the refrigeration agent from the freezing condenser is cooled through the subcooler and enters the second freezing capillary, the cold quantity of the subcooler is provided by the chill loop. The invention can make the two loops work independently, maintains itself best efficiency, in necessary state, the freezing loop my lend cold quantity form the chill loop in order to increase the freezing ability.

Description

Technical field: [0001] The invention relates to a refrigerator-freezer, in particular to a double-refrigeration circuit refrigerator-freezer capable of improving freezing capacity, which is used for food storage and preservation, and belongs to the technical field of refrigeration. Background technique: [0002] The most commonly used type of household refrigerator at present is a refrigerator-freezer, that is, a refrigerator includes a compartment for food refrigeration and a compartment for freezing. The temperature of the refrigerator should be between 0°C and 10°C, while that of the freezer should be below -18°C. [0003] In the prior art, the refrigerating system of the refrigerator-freezer mostly adopts a single refrigeration circuit with only one compressor to realize cooling for the refrigerating chamber and the freezing chamber. In order to meet the requirements of the freezer, the evaporating temperature needs to be relatively low, generally around -30°C. At this...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies of the prior art, and to design and provide a dual-refrigeration system in which the refrigerating and freezing refrigerating circuits can work completely independently, and when necessary, allow the refrigerating circuit to reasonably borrow the cooling capacity of the refrigerating circuit to improve the freezing capacity. The system refrigerates the freezer to overcome the shortcomings of the existing single refrigeration system in which the irreversible loss is too large in the refrigerator, and the refrigeration circuit in the dual refrigeration system cannot borrow the cooling capacity of the refrigeration circuit when necessary

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