Does automatic air conditioning automatically switch between internal and external circulation?
2 Answers
Automatic air conditioning can switch between internal and external circulation. Most mid-to-high-end car automatic air conditioning systems are capable of performing internal and external circulation switching. The switching principle and ease of use of automatic air conditioning are as follows: Switching principle of automatic air conditioning: The switching of automatic air conditioning relies on sensors that monitor air quality. In basic vehicles, the only sensor affecting the switching of automatic air conditioning is the temperature sensor, which transmits the internal temperature and set temperature to the air conditioning system. The air conditioning system then switches the circulation mode via actuators. In automatic air conditioning mode, increasing the temperature difference will activate internal circulation, while decreasing the temperature difference will activate external circulation. However, even if the air conditioning automatically activates internal circulation, there may not always be a light indicator inside the car. In advanced vehicles, in addition to the temperature sensor, there are also air quality sensors and humidity sensors that collectively determine the optimal timing for switching between internal and external circulation. Ease of use of automatic air conditioning: Simply set a temperature value, such as "22 degrees Celsius," and then press the "AUTO" button. Based on feedback from the internal/external temperature sensors, the automatic air conditioning control unit will automatically calculate the most suitable temperature ratio, air supply mode, airflow volume, etc., quickly reaching the temperature set by the passenger.
Hey, as someone who drives frequently, I've encountered similar situations. The automatic air conditioning system can indeed switch between internal and external circulation modes based on the air quality and temperature inside and outside the car. For example, if your car is equipped with sensors and detects a lot of dust, smoke, or unpleasant odors outside, it will automatically switch to internal circulation to prevent dirty air from entering. Once the outside air improves, it will switch back to external circulation for ventilation. However, this feature varies by car—some base models require manual settings via the central control screen or buttons. I recommend paying attention to the system's response during daily use, such as automatic switching when entering polluted areas on the highway, to avoid inhaling harmful gases that could affect your health. If you notice the automatic switching isn’t working properly, it might be due to dust buildup on the sensors—cleaning the air conditioning intake area yourself often solves the issue. In short, the automated design makes driving more convenient, but don’t rely entirely on manual options either.
