How to Turn on the Car's External Air Circulation?

[Thomas]

To turn on the car's external air circulation, press the button on the center console panel. The symbol for the external air circulation button is an arrow pointing from the outside of the vehicle's front windshield into the car. The working principle of external air circulation is to use a fan to draw outside air into the car and expel the inside air through the fan. Functions of the car air conditioning: 1. Achieve cooling effect through the continuous cycle of refrigerant; 2. Use the engine coolant, waste heat, or heat generated by a burner as a heating source, which is then heated by the heater and blown into the car's interior or exterior air by the blower to raise the temperature at the air outlet for heating purposes; 3. Draw in fresh external air for ventilation and air exchange, which effectively prevents windshield fogging.