Refrigeration compressor is the core and heart of the refrigeration system. The capacity and characteristics of the compressor determine the capacity and characteristics of the refrigeration system. In a sense, the design and matching of the refrigeration system reflects the capabilities of the compressor. Therefore, the refrigeration industry all over the world has invested a lot of energy in the research of refrigeration compressors, and new research directions and research results continue to appear. The technology and performance levels of compressors change with each passing day. There are many types of compressors. According to different working principles, refrigeration compressors can be divided into fixed displacement compressors and variable displacement compressors.
Classified by working principle Volumetric compressor, speed compressor
Classified by working evaporation temperature range For single-stage compressors, they can generally be classified into three types: high temperature, middle temperature, and low temperature compressors according to their working evaporation temperature ranges, but the specific evaporation temperature area is not uniformly divided. The general temperature range is: high temperature refrigeration compressor: -10 ~ 10; medium temperature refrigeration compressor: -20 ~ -10; low temperature refrigeration compressor: -45 ~ -20.
Classification by sealing structure Open compressor, hermetic compressor
1. The refrigeration capacity of most hermetic reciprocating compressors does not exceed 0.5KW. It is mainly used in household refrigerators / freezers and small commercial refrigeration equipment. 2. The cooling capacity of the scroll compressor ranges from 0.75 to 15KW (excluding special models), and most of them are between 3 to 5KW. The most applications are in small household air-conditioning and commercial air-conditioning systems. This type of compressor is not used in refrigeration conditions of minus 5 degrees. 3. Centrifugal refrigeration compressors are mainly used for chillers in air-conditioning conditions. 4. The refrigeration capacity of single screw compressor is 30kw-1500kw, which can be used in cold storage, artificial ice rink and chiller. 5.Semi-hermetic piston refrigeration compressors have a wide range of uses. The single unit refrigeration capacity ranges from 3kw to 100kw, and multiple heads can be used in parallel at the same time. Therefore, it can provide refrigeration capacity ranging from 3kw to 1000kw. It can be used in multiple working conditions and can be used in refrigeration conditions , And can be applied to air-conditioning conditions. 6, open piston refrigeration compressor is only used in cold storage, very few chillers in air conditioning conditions.