What is the function of the car's internal and external circulation?
1 Answers
The internal circulation of a car refers to the circulation of air inside the vehicle when it is closed, indicated by an icon of a closed car interior with a circulating arrow. The external circulation, on the other hand, involves drawing air from outside the vehicle into the interior, represented by an icon of a car with an external air arrow pointing into the car. Internal circulation means the air inside the car is heated or cooled and then recirculated within the car. External circulation means the air from outside is heated or cooled before being introduced into the car, facilitating gas exchange between the inside and outside of the vehicle. Additional notes: Whether using the heater or air conditioning, it is advisable to start with internal circulation. However, prolonged use of internal circulation can lead to an increase in carbon dioxide exhaled by passengers. Therefore, it is best to switch to external circulation every hour to refresh the air. Window opening tip: If the outside air quality is poor, such as in heavy traffic areas with high exhaust emissions or in underground parking lots with poor air, avoid using external circulation. When driving on the highway, do not open the windows; instead, use the external circulation system.
