How to correctly use the internal and external circulation mode when turning on the heater in the car?
The heating air used in cars should mainly be external circulation, and the switching between internal and external circulation should be distinguished between automatic and manual air conditioners.
Car warm air is sent into the car from the outside of the vehicle. If you want to have warm air, only relying on internal circulation will be ineffective.
The source of warm air is formed by the circulation of engine coolant after high temperature. The cooling water continuously flows through the warm air water tank to heat the water tank temperature. Then the natural wind blown by the blower passes through the water tank for heating, and is set according to different temperatures. The calculated heating time is mixed with natural wind to adjust the temperature and then sent to the cockpit.
This is the complete process of car heating. The wind is blown into the car from outside the car, so an external circulation is needed to obtain a reasonable temperature. In theory, the internal circulation only uses a blower to blow the air in the car. circulation; however, the inner circulation also retains about 10 gaps to ensure air circulation in the car, so there will be very little warm air blowing into the car from the inner circulation.
However, the air intake ratio of 10 is still very small. Long-term use of internal circulation will cause the air in the car to be turbid and reduce the oxygen content. People who always use internal circulation during long-distance driving will feel a little groggy. , the actual cause of fatigue driving is only important on one hand or lack of oxygen.
After feeling uncomfortable, you can switch to external circulation and refresh the oxygen content of the air in the car through the flow of natural wind. Not only can the temperature rise quickly, but the mind will also be clearer and warmer. When using wind, just pay attention to switching cycles.
Automatic air conditioning does not require special operations. After setting the temperature, the warm air supply will automatically adjust the temperature according to the set value. After reaching the set value, the temperature of the warm air sent into the car will not be very high. High, only retain the proportion that can maintain the set value.
The manual air conditioner needs to be adjusted according to the actual feeling. Wherever the knob is turned, the warm air will continue to be supplied according to the set value. The temperature in the car will get higher and higher, causing the car to be hot and dry; manually adjust it after feeling uncomfortable. Adjusting the heat and air supply volume can change the body feeling. Appropriate use of internal circulation to reduce the hot air volume is also a way. Just be careful not to faint. For reference.
Warm air knowledge: If the water temperature rises too slowly and the warm air cannot appear for a long time, the reason is usually that the thermostat is damaged; this situation can also occur when the ambient temperature is too low. The solution can be appropriately The range reduces the wind impact surface to ensure that the engine can heat up quickly. Be careful not to block the air inlet and retain a certain amount of cooling air.