Electric Bus Air Conditioning Compressor

The electric air conditioning compressor is the core component of an electric vehicle's air conditioning system. Its working principle involves using an electric motor to compress a low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gas, propelling the refrigerant through a closed system to achieve cooling (or heating) inside the vehicle.

Its core workflow follows a refrigeration cycle of "compression-condensation-expansion-evaporation":

1. Compression: The electric motor drives the rotor (such as a scroll plate or piston) inside the compressor to compress the low-temperature, low-pressure refrigerant gas drawn from the evaporator, significantly increasing its temperature and pressure, transforming it into a high-temperature, high-pressure gaseous refrigerant.

2. Condensation: The high-temperature, high-pressure gaseous refrigerant is transported to the condenser outside the vehicle. Here, the refrigerant releases heat to the outside air, cooling and liquefying into a high-pressure liquid.

3. Expansion: The high-pressure liquid refrigerant flows through an expansion valve (or throttle valve), where its pressure and temperature drop sharply, becoming a low-temperature, low-pressure mist-like liquid.

4. Evaporation: Low-temperature, low-pressure liquid refrigerant enters the evaporator inside the vehicle, absorbs heat from the air flowing through it, and evaporates into a low-temperature, low-pressure gas. This process lowers the temperature of the air inside the vehicle, achieving a cooling effect.

5. Circulation: The evaporated low-temperature, low-pressure gaseous refrigerant is drawn back into the compressor, beginning a new cycle.