The correct usage of internal and external circulation on the car

The correct usage of internal and external circulation on the car

There is an internal and external circulation button on the vehicle. When it is lit, it is internal circulation, and when it is closed, it is external circulation. Many people have been driving for more than ten years, but they don't even know how to use the internal and external circulation functions on the vehicle. Today, I will teach you the correct use of internal and external circulation.

First, turn on the external circulation when someone is smoking or there is a peculiar smell in the car, so that the smoke or peculiar smell in the car can be quickly discharged.

Second, turn on the internal circulation when there is a traffic jam, so that the exhaust gas outside the car cannot enter the car.

Third, turn on the external circulation after the vehicle is exposed to the sun, and harmful gases such as formaldehyde in the car can be quickly discharged.

Fourth, turn on the air conditioner in summer, turn on the AC, turn on the internal circulation, so that the cold air in the car cannot go out, and the hot air outside the car cannot come in, and the cooling effect is excellent.

Fifth, turn on the air conditioner in winter, turn off the AC, and turn on the external circulation. This is not only more fuel-efficient, but also the glass is not easy to frost.

Sixth, turn on the external circulation when driving on the highway, so as to ensure air circulation in the car and prevent the driver from lack of oxygen and drowsiness.

Seventh, turn on the air conditioner on rainy days, turn on the AC, turn on the external circulation, and then turn on the front windshield defogger, so that the glass will not fog up.