What is the symbol for the external air circulation in a car's air conditioning?
2 Answers
The internal circulation symbol is a circular arrow inside a car graphic, while the external circulation symbol is an arrow entering the car from outside. Below is an introduction related to external and internal circulation: 1. Using external circulation allows you to breathe fresh air from outside the car. When driving at high speeds for long periods, the air inside the car can become stale and uncomfortable. If you cannot open the windows, you should use external circulation to bring in fresh air. 2. If the warm air in winter feels too hot, you can turn off the fan and activate external circulation. This maintains the interior temperature while allowing fresh air to enter, making you feel more comfortable. 3. The internal circulation in a car refers to the air inside the car being heated or cooled and then recirculated within the vehicle. External circulation refers to air from outside the car being heated or cooled before being sent inside, facilitating gas exchange between the interior and exterior.
I've driven a taxi for ten years, and the external air circulation symbol is the easiest to recognize—it's an arrow pointing from outside the car into the interior, looking like a gust of wind blowing in. This button is usually located in the upper-middle part of the AC panel and has a shiny color. Last time I had a passenger on a rainy day, when the windshield fogged up, I just pressed it, and it immediately drew in dry air from outside to clear the fog, much more effective than wiping with a cloth. Remember, the external circulation symbol is the opposite of the internal circulation one, which has an arrow forming a circle. In summer, when stuck in traffic and needing fresh air, turn on external circulation. On highways, using internal circulation with AC cooling saves more fuel. Switching flexibly is crucial for driving comfort.
