Thus achieving a refrigeration cycle of compression, condensation (heat release), expansion, and evaporation (heat absorption). Compressors are divided into piston compressors, screw compressors, centrifugal compressors, linear compressors, etc. The entry introduces the working principle, classification, accessories, specifications, operating requirements, production of compressors, common faults, environmental requirements, selection principles, installation conditions, and development trends of compressors.

Compressors are produced on an assembly line. Manufacturing cylinder blocks, pistons (shafts), valve plates, connecting rods, crankshafts, end caps, and other components in the machining workshop (including casting); Assemble the rotor and stator in the motor workshop; Manufacturing shells, etc. in the stamping workshop. Then, assembly, welding, cleaning and drying are carried out in the final assembly workshop, and finally, after passing the inspection, packaging is sent out of the factory

Most compressor manufacturers do not produce starters and thermal protectors, but purchase them from the market as needed. Representative companies for compressors include: Meizhi, Mitsubishi, Embraco, etc.