What is the difference between the car's internal circulation and external circulation?

1 Answers
Xavier
07/25/25 6:43am
Difference between the car's internal circulation and external circulation: 1. Different air circulation methods: Internal circulation allows the air inside the car to circulate in a closed state; external circulation brings outside air into the car. 2. Different air circulation states: Internal circulation involves heating or cooling the air inside the car before sending it back into the cabin; external circulation involves heating or cooling the outside air before introducing it into the car. The working principle of internal circulation is to promote air circulation inside the car. The working principle of external circulation is to use a fan to bring outside air into the car, while the air inside the car is blown out by the fan, achieving ventilation without opening the windows.
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