The air compressor is the main body in the air supply unit. The mechanical energy of the prime mover (usually an electric motor) is converted into gas pressure energy, which is a pneumatic generating device for compressed air. The gas entering the vehicle oil-free air compressor is in a natural state. Compressed air with a certain density is sent out to the gas storage tank to form high-pressure air above 10 kg pressure for the vehicle components to work.

Air compressors are mainly divided into three types of applications in the car: brake system, door pump and clutch sub-pump, air suspension. Based on the special needs of the vehicle, the customer has the following requirements for the vehicle air compressor: safe and reliable, high air quality, low maintenance, energy saving, light weight, small size and low noise.

At present, the vehicle-less oil-free air compressor is divided into: piston air compressor, screw air compressor, sliding vane air compressor and scroll air compressor.

The oil-free air compressor for new energy vehicles mainly adopts belt transmission and direct transmission. The air compressor itself is limited by the allowable space of the crank chamber inner cavity. The balance weight used is insufficient, and the inertia force is generally balanced. Part of it, the air compressor operation process is very vibrating and the noise is also very large. Most belt-driven air compressors only reduce the motor speed through the pulley to meet the requirements of low-speed operation. They do not consider balancing the inertia force of the air compressor. Therefore, the vibration of the air compressor is still large and the noise is large. The air compressor of the direct-connected transmission does not consider the problem of balancing the inertial force, and the vibration and noise are also large. At the same time, the air compressor has no problem with the fan-blowing heat dissipation, which reduces the service life. In short, the large amount of vibration, high power consumption, high noise, complex structure, and unstable operation are the main defects of the electric air compressor for the transmission of new energy vehicles.

The main demand for new energy commercial vehicles for vehicle oil-free air compressors is durability and long service life; low maintenance cost and low operating noise; low peripheral control pipelines and high integration; small size and light weight. Different air compressors have different uses, and the air compressors for vehicles also have their own characteristics. In contrast, the current slide machine and small piston machine are more suitable for new energy commercial vehicles. However, due to the limited environment of the vehicle, it is not possible to set up compressed air after-treatment equipment, and it will increase the one-time investment cost and additional maintenance cost. Therefore, the development of the vehicle air compressor to the oil-free machine is the mainstream, and also meets the new energy green. General requirements for environmental protection.

In short, the development of new energy vehicles requires not only the assembly of large electric (battery, motor, electric control) components, but also the improvement of technical content. At the same time, high-energy assemblies such as air compressors are required, and they must also keep pace with the times.