The refrigeration compressor is the most important equipment in the refrigeration unit, and is usually referred to as the host in the refrigeration unit. The increase of the refrigerant vapor from low pressure to high pressure and the continuous flow and transportation of the vapor are all accomplished by the work of the refrigeration compressor. The role of the refrigeration compressor is to:

 1) Absorb refrigerant vapor from the evaporator to ensure a certain evaporation pressure in the evaporator.

 2) Increase the pressure to compress the low-pressure and low-temperature refrigerant vapor into a high-pressure and high-temperature superheated vapor, so as to create conditions for condensation at higher temperatures (such as the temperature around 35°C in summer).

 3) Transport and push the refrigerant to flow in the system to complete the refrigeration cycle.