refrigeration has become an important discipline in the development of science and technology in China. In recent years, refrigeration technology has been widely used in all fields of national economy and people's lives. Such as large and medium-sized cold storage, air conditioning of various civil and public buildings, commercial and household refrigerators, commercial freezers, etc.
refrigeration plays an important role in the production process of petrochemical industry. The liquefaction of natural gas and liquefied petroleum gas, gas separation and other processes are inseparable from refrigeration technology. The application of refrigeration technology in soil freezing provides safety guarantee and good economic benefits for mining and tunnel excavation. The application of refrigeration technology has promoted the production and development of medical and health products. The medical effect of some diseases. Low temperature provides a guarantee for the preservation and transplantation of biological organs. Development of cryobiology and bioengineering. This major can also be engaged in equipment manufacturing in refrigeration industry.
"refrigeration" means to make an object or space reach a lower temperature than the surrounding environment medium in a certain period of time and maintain it within a given temperature range. The so-called environmental medium here is the air and water in nature. In order to make an object or space reach or maintain a certain low temperature, certain methods must be adopted to continuously take out the heat in the object or space and transport this heat to the external environment. Such a heat "transfer" process is a "refrigeration process".