What is the function of the evaporator?

[VanDavid]

The function of the evaporator is to evaporate the low-pressure refrigerant from the expansion valve, absorbing heat from the air inside the vehicle, thereby achieving the purpose of cooling the interior. The car air conditioning evaporator is located inside the car's evaporator box. The causes of its failure are: 1. The adjustment of the expansion valve is too small, resulting in excessively low low-pressure; 2. Insufficient refrigerant in the system, leading to excessively low evaporation pressure; 3. Clogged internal circulation filter; 4. Malfunctioning temperature sensor, causing the compressor to not shut off. The solutions for car air conditioning evaporator failure are: 1. Check if the position of the temperature control sensing bulb is correct; 2. Replace the temperature control regulator; 3. Check if there is a fault in the air conditioning computer's control.