The research and application of technology and core components in commercial refrigeration and freezing Systems：A review

Refrigeration equipment is a kind of equipment that uses refrigeration technology to maintain the low temperature state of food, medicine and other items, which is widely used in industrial, commercial and household fields. With the development of social economy and the improvement of people's living standards, the demand and technical level of refrigeration equipment are also constantly improving. This paper summarizes the technical progress of refrigeration equipment in recent years, mainly including the following three aspects: (1) the development direction and trend of refrigeration technology in refrigeration system; (2) Refrigerants commonly used in refrigeration systems and their advantages and disadvantages, as well as the research and application of new environmentally friendly refrigerants; (3) Technical progress of key components that affect the performance and efficiency of refrigeration systems, such as compressors, evaporators, condensers, and related optimization design and improvement methods. The purpose of this paper is to provide reference for the research and development of refrigeration equipment.