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What are the functions of the car's internal and external air circulation?

2 Answers

MacJason

08/30/25 5:17am

The functions of the car's internal and external air circulation are respectively: 1. The function of the internal circulation is that when the air conditioning system is turned off and the air exchange with the outside is closed, only the air inside the car can be circulated; 2. The function of the external circulation is that when the car's air conditioning system is turned on and the air exchange with the outside is opened, it draws in air from outside the car for circulation. The functions of the car air conditioning are: 1. To cool, heat, ventilate, and purify the air inside the car; 2. To provide a comfortable riding environment for passengers, reduce the driver's fatigue, and improve driving safety. Methods for maintaining the car air conditioning: 1. Clean the air conditioning vents in time; 2. Maintain the air conditioning condenser in time; 3. Clean or replace the air conditioning filter in time. Methods for proper use of the air conditioning: 1. Turn off the air conditioning when driving at low speeds; 2. Do not smoke in the car when the air conditioning is on; 3. Turn off the engine before turning off the air conditioning; 4. Immediately activate the internal circulation when entering the car in summer.

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KathrynFitz

09/12/25 2:28am

The function of the recirculation mode is to circulate the air inside the car and block external air from entering. For example, I use this when stuck in traffic or passing by a landfill to prevent unpleasant odors from affecting my mood. The fresh air mode, on the other hand, draws in fresh air from outside, making the cabin more refreshing, especially when opening windows on the highway is impractical—it helps avoid prolonged stuffiness and dizziness. These two modes are controlled via the air conditioning buttons. In summer, using recirculation cools the car faster and saves energy, while in winter, fresh air mode helps defog the windows more quickly. I usually switch between these modes based on weather and road conditions to maintain air circulation without compromising health. Balancing their use has made the cabin environment more comfortable and helps prevent driver fatigue.

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