Refrigerating and freezing device

Abstract

The invention provides a refrigerating and freezing device. The refrigerating and freezing device comprises a box body, a heat exchanger, a vapor compression refrigerating system and a Stirling refrigerating system, wherein a copious cooling chamber is defined in the box body, the heat exchanger is at least partially arranged in the copious cooling chamber, the vapor compression refrigerating system comprises an evaporation pipe arranged in the copious cooling chamber, the evaporation pipe is arranged to be in heat connection with the heat exchanger, the Stirling refrigerating system comprisesa Stirling cryocooler, and the cold end of the Stirling cryocooler is arranged to be in thermal connection with the heat exchanger. According to the refrigerating and freezing device, a refrigerant pipe of the vapor compression refrigerating system and a cold conducting and heat conducting pipe of the Stirling refrigerating system are in heat connection with the heat exchanger, so that the refrigerating efficiency is high, wide-range temperature change of the copious cooling chamber can be further realized, the use requirements of different users are flexibly met, and the applicability is high.

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.

Aerospace, medical and other fields use the Stirling refrigeration system for refrigeration. This system can achieve a cooling temperature below -200°C. However, the cold end area of ​​the Stirling refrigerator is small and the cooling efficiency is low.

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