The bleed air from the low-pressure compressor of the engine is decompressed by the pressure regulator and cooled by the pre-cooling air valve, and then enters the air supply main pipe at 35psi (2.4 atmospheres) and 220 degrees Celsius, and flows through the engine hanger, the leading edge of the large wing, and the front wall of the wheel well. After the board enters two air conditioning components located in the belly of the aircraft.

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.

The aircraft air conditioning air supply pipe ​is a pipe used to connect the ground air conditioning and the air conditioning air supply outlet of the aircraft. When the traditional air-conditioning air supply pipe is transported from the warehouse to the airport, it is very inconvenient to fold and store the air supply pipe, and it takes up a lot of space.