What is the fault diagnosis process of automobile air conditioner

First feel with your hands whether the wind from the air outlet of the car air conditioner is cool. If it is not cooling, put up the engine cover to confirm whether the electronic fan and compressor are rotating. Finally, touch the high-pressure pipe to see if it will be hot. Whether it is cold or not.

　　

The operating principle of automobile air conditioner is to rely on the uninterrupted frequency conversion cycle of refrigerant to achieve the cooling effect. It is mainly composed of expansion valve, compressor, condenser, evaporator and refrigerant. There are actually many refrigeration methods, such as liquid vaporization refrigeration, gas expansion refrigeration, eddy current tube refrigeration, and thermoelectric refrigeration. There are vapor compression, suction, vapor injection and adsorption refrigeration methods for liquid gas refrigeration. The current automobile refrigeration is mainly a vapor compression refrigeration cycle.