In short, the function of solenoid valve is to cut off the circuit of the system when the compressor stops, so as to avoid liquid hammer when the compressor starts next time. it is generally used in a larger refrigeration system. In refrigeration equipment, the solenoid valve is used to change the direction of refrigeration and heating. The function of the expansion valve in the four core components is to adjust the refrigeration pressure to achieve the effect of refrigerant evaporation. Here we have a more easy-to-understand explanation: the valve controlled by electromagnet is called solenoid valve for short. This kind of valve is widely used in automatic control systems. It is the key component of control execution.

Its working principle is: several holes are opened in different positions of a valve body, each hole is connected with different oil pipes, and then electromagnetic induction is used to control the movement of the valve stem to control which hole to plug or which hole to vent. In order to achieve the purpose of control. The solenoid valve can cooperate with different circuits to achieve the desired control, and the control accuracy and flexibility can be guaranteed. This is also one aspect of the wide application of solenoid valves.