What is the electrical working process of the air-conditioning compressor of an electric vehicle

　　The car air conditioner compressor air conditioner transfers heat from the enclosed space to the outside, or brings heat from the outside into the enclosed space. There will be no heat generation in the process, but only the transfer of heat. The compressor air conditioner on the electric vehicle is logically managed by the vehicle controller VCU, and its specific implementation forms are various. Here, a typical form is used to illustrate its detailed working process.

　　Electrical work process

　　From an electrical point of view, compressor air conditioners are mainly composed of the following parts: air conditioner controller, compressor and thermodynamic system, compressor motor and its controller, communication module, temperature and pressure sensor. The electric of the car air conditioner is divided into two parts, the high-voltage part and the low-voltage part. DC+ and DC- are high-voltage power supplies, directly connected to the compressor motor controller. "Air conditioner relay" is the power switch of the air conditioner controller.

　　Cooling and heating capacity adjustment

　　The air conditioner controller closes the high-pressure circuit contactor, and the compressor enters the working state. Passengers can adjust the temperature in the cabin by adjusting the air volume and temperature setting buttons. The greater the air volume, the more heat is brought into the vehicle compartment from the condenser, and the greater the power of the compressor is required. The greater the difference between the set temperature and the current temperature, the greater the compressor power required. The air-conditioning controller achieves the purpose of controlling the amount of cooling and heating by controlling the motor speed of the electric compressor. The motor speed is high, the corresponding operating speed of the compressor increases, the refrigerant flow rate increases, and the cooling capacity increases.