How to Turn On the Car Air Conditioner's Internal and External Circulation?
3 Answers
To activate the car air conditioner's internal and external circulation: Use the speed adjustment knob. Turning it clockwise activates the external circulation, while turning it counterclockwise activates the internal circulation. The working principles of the car air conditioner's internal and external circulation are as follows: Internal circulation closes the airflow channel between the inside and outside of the car, creating an airflow cycle within the vehicle. External circulation brings outside air into the car through the air filter and blower, replenishing fresh air inside. The car air conditioner is designed to regulate and control the temperature, humidity, air cleanliness, and airflow within the car cabin to an optimal state, providing a comfortable environment for passengers and reducing travel fatigue.
I've been driving for over twenty years, and how to turn on the air recirculation is actually quite simple. Most cars have a button on the air conditioning control panel labeled "Recirculation" or with an icon of a car with an arrow inside. Just press that button once, and when the light is on, it means the recirculation is activated. At this time, the air only circulates inside the car, and no outside air comes in, which is particularly fuel-efficient and cools down quickly. Press the button again, and when the light turns off, it switches back to fresh air mode, allowing outside air to come in, which is suitable for good ventilation or defogging situations. I think for daily driving, using recirculation on highways saves fuel, while switching to fresh air in traffic jams avoids stuffiness; for cars with automatic air conditioning, simply pressing the AUTO button can also intelligently switch between modes. Remember to switch appropriately when using the air conditioning to ensure a comfortable and safe drive.
I learned how to use the air conditioning soon after buying my car, and switching between internal and external circulation is super convenient. There's a small button on the center console, usually labeled 'Internal Circulation' or with an icon—just press it to toggle the mode. When the light is on, it means internal circulation is active, recirculating air inside the car; when the light is off, it's external circulation, bringing in fresh air. I often use internal circulation in summer to cool the car faster and switch to external circulation in winter to prevent windshield fogging. Some cars even allow you to set the circulation mode or adjust vent directions via the center screen, which is pretty smart. Keeping the air fresh inside the car is important, especially in highly polluted areas where external circulation helps. Try using this button more while driving, and you'll get used to switching modes over time.
