Compressor Classification

Compressors can be divided into volumetric compressors and velocity compressors according to their principles. The volumetric type is further divided into: reciprocating compressors and rotary compressors; The speed compressor is divided into axial compressor, centrifugal compressor and mixed flow compressor.
Nowadays, household refrigerators and air conditioning compressors are both volumetric, which can be divided into reciprocating and rotary types. Reciprocating compressors use piston, crank, connecting rod mechanisms or piston, crank, and sliding tube mechanisms, while rotary compressors mostly use rolling rotor compressors. In commercial air conditioners, they are often centrifugal, vortex, or screw type.
According to the application scope, it can be divided into low back pressure, medium back pressure, and high back pressure. Low back pressure type (evaporation temperature -35~-15 ℃), generally used for household refrigerators, food freezers, etc. Medium back pressure type (evaporation temperature -20~0 ℃), generally used for cold drink cabinets, milk refrigerated containers, etc. High back pressure type (evaporation temperature -5-15 ℃), generally used for room air conditioners, dehumidifiers, heat pumps, etc.