The air conditioning system, also known as the cockpit environment control system, is to make the cockpit, passenger cabin, equipment cabin and cargo hold of the aircraft have good environmental parameters under different flight conditions and external conditions.

Aircraft air conditioners​ come from the bleed air of the air source system. The bleed air temperature of the air source system is very high and cannot be directly applied. The air conditioner must be cooled by the cooling component. The cooling component is cooled by the bleed air of the air source system and the external punch. The heat exchange of air is realized.