Heating principle: As shown in Figure 1, the heat pump mainly consists of a refrigeration compressor, a condenser, an expansion valve, an evaporator, etc. to form a refrigeration circuit, and the refrigerant is filled in the refrigeration circuit. The refrigeration compressor is connected to the three-phase AC power and rotates at high speed, sucking the low-temperature and low-pressure refrigerant gas into the compressor, which becomes a high-pressure and high-temperature gas after compression. The high-temperature and high-pressure gas is cooled by cooling water through the condenser and becomes a medium-pressure and medium-temperature refrigerant liquid. The refrigerant liquid is sent to the evaporator after throttling and reducing pressure by the expansion valve. Since the evaporator is connected to the suction port of the compressor, the compressor continuously inhales the refrigerant gas of the evaporator, which reduces the pressure of a large amount of refrigerant entering the evaporator, and the refrigerant further evaporates in large quantities. Since the other side of the evaporator is connected to the water pump in the groundwater, when the groundwater flows through the evaporator in large quantities, the evaporated refrigerant takes away a large amount of heat in the groundwater (because the evaporation process of the refrigerant is also the process of the refrigerant absorbing heat). The groundwater contains a large amount of low-temperature heat from the shallow soil of the earth. This low-temperature heat is absorbed and extracted by the refrigerant evaporated in the evaporator through the groundwater medium to become refrigerant heat, and is continuously inhaled into the refrigeration compressor. After being compressed by the compressor, it becomes a high-temperature gas of 80-90℃. During the process of being cooled by the condenser, this high-temperature gas transfers a large amount of high-temperature heat to the heating system on the other side of the condenser. The process of cooling the 80-90℃ high-temperature refrigerant gas can also be regarded as the process of transferring this high-temperature heat to the cooling system, or the heating process of the heating system, maintaining the water temperature of the heating system at 50-60℃, and supplying heat to the air-conditioned room through the fan coil or radiator load.
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