24v electric ac 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: An electric motor drives the compression mechanism—typically a scroll assembly or reciprocating piston—to adiabatically compress low-temperature, low-pressure refrigerant vapor drawn from the evaporator. This process elevates both the refrigerant’s pressure and saturation temperature, yielding high-temperature, high-pressure superheated vapor.
2. Condensation: The high-temperature, high-pressure refrigerant vapor is routed to the external condenser, where it rejects latent heat to ambient air via forced convection. As a result, the refrigerant undergoes full desuperheating, condensation, and subcooling, exiting as a high-pressure, subcooled liquid.
3. Expansion: The high-pressure liquid refrigerant passes through a thermostatic expansion valve (TXV) or electronic expansion valve (EXV), undergoing an isenthalpic throttling process. This reduces its pressure and temperature sharply, producing a low-temperature, low-pressure liquid–vapor mixture (typically 20–30% vapor quality).
4. Evaporation: The low-temperature, low-pressure refrigerant mixture enters the cabin-mounted evaporator. It absorbs sensible and latent heat from the recirculated/ambient air stream, fully vaporizing into saturated or slightly superheated vapor. This endothermic phase change cools and dehumidifies the air delivered to the passenger compartment.
5. Circulation: The resulting low-temperature, low-pressure refrigerant vapor is suctioned back into the compressor inlet, thereby completing the closed-loop thermodynamic cycle—repeated continuously to maintain cabin thermal comfort and system stability.