Where does the outside air circulation in a car come from?
4 Answers
Simply put, the outside air circulation system connects the air intake to openings in the car body, drawing air from outside, while the exhaust has a vent valve. Here are some tips for using car air conditioning: 1. Ventilate before turning on: After the car has been parked in the sun for a long time, open all four doors and the sunroof to allow air to circulate for 3 minutes. This quickly lowers the interior temperature, making the air conditioning more effective when turned on. 2. Use the recirculation mode wisely: The recirculation mode blocks hot outside air, creating a sealed space inside the car. This allows the interior air to circulate quickly under the air conditioning, achieving rapid cooling. Once the interior temperature has dropped, it is recommended to switch to outside air circulation every 30 minutes to refresh the air inside the car, then switch back to recirculation after 5 minutes. 3. Turn off the air conditioning in time: Turn off the air conditioning 5 minutes before parking to protect the engine and save fuel.
I've driven quite a few cars and noticed that the fresh air intake for the exterior circulation always comes from the front of the vehicle, specifically located near the leading edge of the hood or through the grille below the windshield. Those elevated vents are designed to prevent road debris from being sucked in, ensuring clean and fresh air enters the cabin. When driving, I prefer using the exterior circulation to bring in fresh air, especially on suburban roads, as it helps reduce odors and humidity inside the car. However, it's important to avoid letting leaves or small insects clog the intake vents, as this can reduce airflow and lower the efficiency of the air conditioning system. During winter or rainy conditions, the intake vents also assist in defogging, enhancing driving safety. Just remember to perform regular cleaning maintenance.
From the perspective of comfortable driving, the air source for the external circulation comes from the intake vents at the front of the car, usually hidden near the engine or at the base of the windshield. This design efficiently draws in outside air, filters it, and delivers it into the cabin. I always turn it on in areas with good air quality to breathe fresh air, which really lifts my spirits. If I forget to switch back to internal circulation in the city, it might draw in exhaust fumes, doing more harm than good. During cleaning, I make sure to check these vents to avoid blockages that could affect health.
New drivers often ask me where the outside air comes in for the recirculation mode. It's at the front of the car, through those small vents below the windshield. Don't mistakenly think it's somewhere inside the cabin - all fresh air is drawn from outside. You'll notice a significant change in airflow when switching modes, making it especially suitable for long-distance travel.
