What is the AC in a car's air conditioning system?

[SanElizabeth]

Car air conditioning AC is the cooling switch for the air conditioning system. Pressing the AC button will gradually lower the temperature inside the car. The functions of the car air conditioning system are: 1. Utilizing the continuous cycle of refrigerant to achieve a cooling effect; 2. Drawing in fresh air from outside for ventilation and air exchange, preventing window fogging; 3. Using engine coolant, waste heat, or heat generated by a burner as a heating source, which is then warmed by the heater and blown into the car by the blower to raise the temperature and achieve a heating effect. Maintenance methods for car air conditioning: 1. Clean the air conditioning vents promptly; 2. Maintain the air conditioning condenser in a timely manner; 3. Clean or replace the air conditioning filter element as needed.