The compressor provides refrigerant transport in the system. The external mechanical energy introduced here ensures the circulation and, on the other hand, increases the pressure of the refrigerant, together with its temperature. Coolant intake is carried out in steam, low pressure and low temperature. Then, after compression, the system continues to flow at high temperatures or high pressure. The lubrication of the compressor bearing is made by special oil, which is supplied by the manufacturer. Lubricant (oil) is also circulated by the compressor in the system.

Compressor drive is supplied with a V-belt from the motor's main shaft and the electromagnetic clutch closes the mechanical connection to the compressor piston.