What is the car air recirculation symbol?

[StLandon]

Typically, it is a side view of a car with an arrow passing from the front windshield into the interior, indicating external air circulation. If there is a rotating arrow inside the car, it indicates internal air recirculation. Below is information about car air recirculation and external air circulation: 1. Car air recirculation and external air circulation refer to the direction of air intake for the air conditioning system, either from inside or outside the vehicle. 2. Internal air recirculation means the air inside the car is heated or cooled and then circulated back into the cabin, while external air circulation means outside air is heated or cooled before being sent into the cabin, allowing for gas exchange between the interior and exterior. 3. External air circulation mode uses a fan to draw outside air into the cabin, meaning the air ducts between the outside and inside are open. The air blown by the fan comes from outside, and even if the fan is off, airflow is still drawn into the cabin while driving, replenishing fresh air inside the car.