The principle of air conditioning in the car cabin by the car air conditioning system

The car air conditioning system is a device that cools, heats, exchanges, and purifies the air inside the cabin. It can provide a comfortable riding environment for passengers, reduce driver fatigue, and improve driving safety.

The air conditioning system has become one of the indicators to measure whether a car is fully functional.

Modern car air conditioning has four functions, any of which is designed to make passengers feel comfortable.

(1) The air conditioner can control the temperature inside the cabin, both heating and cooling the air, in order to control the temperature inside the cabin to a comfortable level;

(2) The air conditioner can remove moisture from the air. Dry air absorbs human sweat to create a more comfortable environment;

(3) The air conditioner can draw in fresh air and has ventilation function;

(4) The air conditioner can filter the air and remove dust and pollen from the air.

1. According to the driving method, it can be divided into independent type (a dedicated engine drives the compressor, with a large cooling capacity, stable operation, but high cost, large volume and weight, mostly used for large and medium-sized buses) and non independent type (the air conditioning compressor is driven by the car engine, and the cooling performance is greatly affected by the engine operation, with poor stability, mostly used for small buses and sedans).

2. According to the performance of air conditioning, it can be divided into single function type (installing and operating cooling, heating, and ventilation systems separately, without interfering with each other, mostly used on large passenger cars and cargo vehicles) and integrated cooling and heating type (cooling, heating, and ventilation share a blower and air duct, controlled on the same control board, and can be divided into combination type of cooling and heating working separately and mixed temperature control type of cooling and heating working simultaneously. Mixed temperature control type is commonly used in cars).

According to the control mode, it can be divided into manual control (using the function keys on the control panel to control temperature, wind speed, and wind direction) and electronic pneumatic adjustment (using a vacuum control mechanism, when the air conditioning function key is selected, the temperature and air volume can be automatically controlled within the predetermined temperature).

3. According to the control method, it can be divided into: fully automatic adjustment (using calculation and comparison circuits to control the operation of the adjustment mechanism through sensor signals and pre adjustment signals, automatically adjusting temperature and air volume) and microcomputer controlled fully automatic adjustment (using the microcomputer as the control center to achieve comprehensive and multifunctional optimal control and adjustment of the air environment inside the car).