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How to Use the Internal and External Circulation of Car Air Conditioning?

2 Answers

LeRiley

07/29/25 3:36am

Correct usage methods for the internal and external circulation of car air conditioning: After starting the vehicle, allow it to warm up for a while. Once the water temperature rises, turn on the heater, first set to external circulation to expel the cold air inside the car, then switch to internal circulation to warm up the interior. Below is an introduction to car air conditioning: 1. Definition of car air conditioning: The car air conditioning system is a device that cools, heats, ventilates, and purifies the air inside the vehicle, providing a comfortable environment for passengers, reducing driver fatigue, and enhancing driving safety. 2. Application of car air conditioning: Most cars use an integrated heating and cooling air conditioning system. The layout typically combines the evaporator, heater radiator, centrifugal blower, and control mechanism into a single unit, known as the air conditioning assembly.

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JeffreyMarie

08/12/25 7:25am

I've been driving a taxi for decades and know all the tricks about using the air recirculation system. The inner circulation mode only recirculates the air inside the car, which is perfect for traffic jams or dusty roads, helping avoid inhaling exhaust fumes or dust from outside to protect lung health. But remember, keeping it on for too long can make the air stuffy and cause dizziness, so I switch to outer circulation every hour or two to get some fresh air. The outer circulation mode brings in fresh outside air, which is great for highway driving or long trips - the incoming breeze feels refreshing and helps reduce fatigue. On rainy days when windows fog up easily, turning on outer circulation clears them right up. My advice for new drivers is to develop this habit: use inner circulation in traffic jams, and switch to outer circulation when windows start fogging or during highway driving. Regularly cleaning the air filter is also crucial, otherwise bacteria buildup can actually harm your health. My car's AC has been perfectly tuned after all these years, making rides extremely comfortable. Don't underestimate this detail - it really affects your daily driving experience.

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