Where Does the Air from the Car's External Circulation Get Exhausted?
2 Answers
External circulation air in the car is primarily exhausted through ventilation holes in the vehicle's interior and trunk. These ventilation holes are connected to the outside, with their external breathing ports hidden inside the fender above the tires. Functions of ventilation holes and breathing ports: 1. Release of air pressure from the external circulation of the air conditioning system. 2. Prevention of pressure buildup inside the car when doors are closed quickly, which could cause glass to shatter due to pressure expansion, leading to discomfort or injury to passengers' eardrums. 3. These ventilation holes are equipped with filters to prevent dust or insects from entering, while also providing a certain level of barrier.
I've driven quite a few cars and know a thing or two about air conditioning systems. In the recirculation mode, the air inside the car is mainly expelled through a few small design features of the vehicle body: places where the door seals aren't tight allow air to slowly leak out; there are usually special exhaust grilles near the trunk, specifically designed to release excess air; some cars also have ventilation holes under the seats or in the chassis to prevent excessive pressure inside the car. If the air isn't expelled, the interior can feel stuffy or develop odors, affecting comfort. I recommend regularly checking these areas to ensure they're not blocked by dust or debris, especially during long summer drives, as maintaining air circulation can prevent window fogging. Regularly cleaning the air conditioning filter can also help with smooth air expulsion. Overall, proper use of the recirculation mode can save fuel and promote health.
