1. Non-independent air conditioner: an air conditioning system that directly uses the driving power (engine) of the car to run. The non-independent air conditioner is driven by the main engine to drive the compressor and is controlled by an electromagnetic clutch. When the power is turned on, the car air conditioning clutch is disconnected and the compressor is stopped, so as to adjust the supply of cold air and achieve the purpose of controlling the temperature in the cabin. The advantages are simple structure, easy installation and arrangement, and low noise.

Because it needs to consume 10%-15% of the power of the main engine, it directly affects the acceleration performance and climbing ability of the car. At the same time, its cooling capacity is affected by the speed of the car. If the car stops running, its air conditioning system also stops running.

Nonetheless, non-independent air conditioners have gradually become the dominant product in the market due to their lower cost (relative to independent air conditioners) and reliable quality. At present, most cars, vans and minibuses use this kind of air conditioner. Currently non-independent air conditioners.

2. Independent air conditioner: There is a special power source (such as a second internal combustion engine) to drive the operation of the entire air conditioning system. Generally used for long-distance freight, high-floor large and medium-sized buses and other vehicles. The independent air conditioner requires two engines, which results in high fuel consumption and high cost, and its repair and maintenance are very difficult, requiring very skilled engine maintenance personnel, and engine parts are not easy to obtain, especially imported engines; Installation is more likely to lead to system quality problems, and additional drive motors increase the probability of failure.