How does a car air conditioner turn cold air into hot air?

There is an air conditioning system on the car center console. It is roughly divided into three parts: cold and warm air regulation, air volume regulation, and detailed mode selection, such as internal circulation and pre-defogging. Take the air conditioning control panel of a domestic independent brand as an example:

Turn off the heating and turn on the air conditioning;

1. Turn the temperature adjustment knob to the left to the blue area. The greater the counterclockwise rotation angle, the lower the temperature;

2. Press the A/C key to start the air conditioning refrigeration mode;

3. Turn the air volume adjustment button to adjust the air volume of the air conditioner.

4. If you need to adjust, such as air conditioning blowing mode and in-vehicle circulation mode, you can press the mode key to select.