What is the difference between the internal circulation and external circulation of a vehicle?
1 Answers
Internal circulation means that the air inside the vehicle circulates when the car is closed, and the icon is a closed car with a circulating arrow inside; while external circulation means that the air outside the car flows into the car, and the icon is an unclosed car with an air arrow pointing into the car from the outside. The specific differences are as follows: 1. Internal circulation refers to the air inside the car being heated or cooled and then sent back into the car; external circulation refers to the air outside the car being heated or cooled and then sent into the car, which means gas exchange between the inside and outside of the car. 2. Generally, when turning on the air conditioning for cooling or heating, you can first turn on the internal circulation to quickly lower or raise the temperature inside the car. When the temperature stabilizes, appropriately switch to external circulation to exchange air with the outside. If the air quality outside the car is not good, such as in traffic jams with a lot of exhaust fumes or in underground parking lots with poor air, do not turn on the external circulation. If you are driving on the highway, do not open the car windows, just turn on the external circulation. When the air outside is good and you feel stuffy inside the car, quickly turn on the external circulation for ventilation; if you want to maintain the air inside the car, turn on the internal circulation.
