Refrigerating and freezing device

Abstract

The invention provides a refrigerating and freezing device. The refrigerating and freezing device comprises a box body, a steam compression refrigerating system and a Stirling refrigerating system, wherein multiple storage chambers are defined in the box body, and one of the storage chambers is a cryogenic chamber; at least one part of the steam compression refrigerating system is arranged in thecryogenic chamber or reaches the cryogenic chamber so as to supply cold to the cryogenic chamber; and at least one part of the Stirling refrigerating system is arranged in the cryogenic chamber or reaches the cryogenic chamber so as to supply cold to the cryogenic chamber. According to the refrigerating and freezing device, the steam compression refrigerating system and the Stirling refrigeratingsystem selectively supply cold to the cryogenic chamber at the same time, so that the refrigerating efficiency is high, and meanwhile wide-range temperature changing of the cryogenic chamber can be achieved, the use requirements for different users are flexibly met, and high applicability is realized.

Description

technical field [0001] The invention relates to the field of refrigeration, in particular to a refrigeration and freezing device using a Stirling refrigeration system and a vapor compression refrigeration system for refrigeration. 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. Aerospa...

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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