Which Button is for the External Air Circulation?
2 Answers
It is a car symbol with an arrow pointing from the outside into the car, which represents the external air circulation button. When the vehicle's air conditioning or heating system is activated, using the external air circulation allows outside air to enter the car, providing ventilation. External Air Circulation: In the external air circulation mode, a fan draws air from outside the vehicle into the interior, meaning the air passage between the outside and inside of the car is open. The air blown by the fan comes from outside, and even if the fan is not turned on, airflow is still drawn into the car while driving, replenishing fresh air inside the vehicle. Function of External Air Circulation: When the air inside the car is stale, using the external air circulation allows fresh air to enter, effectively improving the air quality inside the vehicle. This is especially useful for new cars, as it helps eliminate odors. In rainy weather, using the external air circulation prevents fogging on the windshield and other windows, enhancing driving safety.
I've been driving for several years, and the external air circulation button is actually quite common. It's located on the car's air conditioning panel, usually marked with a small car icon and an outward-pointing arrow, indicating the intake of fresh air from outside the vehicle. I typically use it when the air quality is good, such as on highways or in rural areas, to allow fresh air in, improve the cabin environment, and prevent stuffiness or window fogging. On some car models, this button is also labeled '外循环' (external circulation) or 'OUT,' and its position may be in the central console area near the steering wheel. When air pollution is severe, I switch to internal circulation to avoid harmful substances entering the cabin. The operation is simple—press the button, and when the light turns on, it's activated. The fan speed may adjust automatically. Regularly cleaning the air conditioning filter can also enhance the effectiveness of external circulation; otherwise, blockages can affect airflow. It's recommended to check the air conditioning system every six months to maintain efficient operation.
