The reason why the air blown out by the automobile air-conditioning pipe is not cool is because the amount of air passing through the evaporator is small, and the amount of cold air sent out will be reduced, so the wind sense is weak, so the cooling capacity is insufficient. The following is an introduction about automobile air conditioning: 1. Concept: Automobile air conditioning system is a device to realize air cooling, heating, ventilation and air purification in the compartment. It can provide a comfortable riding environment for passengers, reduce the fatigue strength of drivers and improve driving safety. 2. Layout: Different types of air conditioning systems have different layout methods. Integrated air conditioning systems are widely used in automobiles. Its layout is to assemble evaporator, warm air radiator, centrifugal fan and control mechanism together, which is called air conditioning assembly.