Refrigeration and heating switching: By changing the flow direction of refrigerant, the cooling function of the air conditioner in summer and heating in winter can be converted to meet the needs of indoor temperature regulation in different seasons. Ensure the refrigeration cycle: In the refrigeration mode, the refrigerant is fed from the compressor to the condenser, and then sent to the evaporator through the expansion valve to absorb the indoor heat and reduce the indoor temperature. Realize the heating cycle: during heating, the refrigerant is fed from the compressor to the evaporator, and then sent to the condenser through the expansion valve to release heat and increase the indoor temperature. Adjust the flow of refrigerant: The flow of refrigerant in the system can be adjusted to control the cooling or heating effect and accurately adjust the indoor temperature. Air Conditioning Four-Way Heat Pump Reversing Valve With Coil AC220V 1-5P ，Compatible For Sanhua ，