What is the function of the evaporator in a car's air conditioning system?

[LaneLee]

The function of the evaporator in a car's air conditioning system is to evaporate the low-pressure refrigerant coming from the expansion valve, absorbing heat from the air inside the vehicle to achieve the purpose of cooling the interior. The evaporator acts as a heat exchanger where high-pressure liquid refrigerant enters through the expansion valve. Due to the atomization effect of the expansion valve, the liquid refrigerant turns into a mist, which then changes into a gaseous state under low-pressure conditions. There are several types of evaporators, including tube-fin, tube-belt, and laminated types. Currently, passenger cars in China mainly use all-aluminum laminated and tube-belt evaporators, while large buses primarily use copper tube-aluminum fin evaporators. Medium-sized buses may use any of these types, with tube-belt evaporators being the most common.