The A320 aircraft air conditioning system​ mainly consists of four major parts: regional temperature control, electronic equipment ventilation, pressurization system, cargo compartment ventilation/heating (optional). The cooling air is provided by two refrigeration components. The components are based on the principle of turbocharged refrigeration, and their performance directly affects the comfort of the cabin and cockpit.

When traveling by plane, whether it is boarding or flying at an altitude of 10,000 meters, the appropriate temperature and fresh air in the cabin are the basis for a pleasant travel. And these are the important tasks of the air management system.

Pre-conditioned air unit​ is a brand-new type of air-conditioning unit that is placed outside of civil aviation aircraft and uses long air supply ducts and aircraft-specific connectors to supply air to the cabin through the external air-conditioning interface at the lower part of the aircraft fuselage and the complex air supply ducts inside the fuselage wind special air conditioner.