A standard automobile air conditioning system consists of an air conditioning control panel, an air conditioning compressor, an air conditioning PTC, an air conditioning controller, a blower, and various actuators and sensors. Among them, the air conditioning control panel is responsible for the input of user instructions. The driver and passengers can adjust the temperature, humidity, cleanliness, flow rate, etc. of the air in the car through the air conditioning control panel; the air conditioning compressor is used for air cooling; the air conditioning PTC is used for air Heating; the blower is used to output a certain amount of air; and the air conditioning controller is the core of connecting the above products. It can accurately obtain the actual situation of the car environment, and control each module according to the user's needs, so that the car environment can satisfy the user Requirements.

The air conditioning controller is connected to multiple sensors in the car, and can accurately obtain the environment in the car through these sensors. At the same time, the controller communicates with the air conditioning control panel through CAN, which can obtain the driver's requirements for the environment in real time. Using internal algorithms, the air-conditioning compressor and air-conditioning PTC, blower are controlled through CAN, and the actuators such as damper motors and valves are controlled to achieve precise control of the environment in the car.

Main control: The air-conditioning controller needs to be connected to multiple sensors in the car and requires a more complicated control algorithm, which requires higher FLASH size and ADC channels of the main control. NXP's S32K series MCUs are rich in resources and cost-effective. Flash is from 128KB to 2MB, and the number of ADC channels is from 13 to 64. It is sufficient for air-conditioning controller applications with different needs.