How to Use the Car Air Conditioning's Internal and External Circulation?

[VonPreston]

The method to use the car air conditioning's internal and external circulation is: Press the corresponding buttons to switch the air conditioning mode to internal or external circulation. The differences between internal and external circulation are: 1. Internal circulation allows the air inside the car to circulate when the cabin is closed; external circulation brings outside air into the car. 2. Internal circulation means the air inside the car is heated or cooled before being recirculated inside; external circulation means outside air is heated or cooled before being brought into the car. Generally, when turning on the air conditioning for cooling or heating, you can first activate internal circulation to quickly lower or raise the temperature inside the car. Once the temperature stabilizes, you can appropriately switch to external circulation to exchange air with the outside.