Control device used for cold storage and freezing device and cold storage and freezing device

Abstract

The invention provides a control device used for a cold storage and freezing device and the cold storage and freezing device. The cold storage and freezing device comprises a box body for defining a copious cooling compartment, a steam compression refrigeration system used for providing cold for the copious cooling compartment and a Stirling refrigeration system. The control method comprises the following steps of judging whether the temperature of the copious cooling compartment is larger than or equal to the set copious cooling temperature or not; if yes, controlling the steam compression refrigeration system to supply cold to the copious cooling compartment for preset time, and enabling the Stirling refrigeration system to stop supplying cold to the copious cooling compartment; after the preset time, if the compartment temperature is larger than or equal to the set copious cooling temperature, controlling the Stirling refrigeration system to supply cold to the copious cooling compartment, enabling the steam compression refrigeration system to stop supplying cold to the copious cooling compartment, and enabling the two systems to be in the optimal work state. The refrigeration efficiency of the cold storage and freezing device to the copious cooling compartment can be improved wholly, the energy consumption of the cold storage and freezing device is reduced, and the service life of a compressor and a Stirling refrigeration device can be prolonged.

Description

technical field [0001] The invention relates to the refrigeration field, in particular to a control method for a refrigeration and freezing device and the refrigeration and freezing device. Background technique [0002] As people pay more attention to health, household reserves of high-end ingredients are also increasing. According to research, the storage temperature of ingredients is lower than their glass transition temperature, the properties of ingredients will be relatively stable, and the shelf life will be greatly extended. Among them, the glass transition temperature of ingredients is mostly concentrated at -80°C to -30°C. [0003] Existing household refrigerators all use vapor compression for refrigeration. Refrigerators using semiconductor and magnetic refrigeration have been developed in recent years. However, due to the limitation of refrigeration efficiency, it is difficult to achieve a temperature below -30°C. Aerospace, medical and other fields use the Stir...

AI Technical Summary

Problems solved by technology

[0003] Existing household refrigerators are all cooled by vapor compression. In recent years, refrigerators using semiconductor and magnetic refrigeration have been developed. However, due to the limitation of refrigeration efficiency, it is difficult to achieve a temperature below -30°C.

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