What are the functions of the four major components of an air source heat pump?

Air source heat pumps are mainly composed of compressors, expansion valves, fin heat exchangers and sleeve heat exchangers. By inputting electrical energy to drive the work of the compressor and motor, the fin heat exchanger can absorb heat, and the heat release process of the sleeve heat exchanger can be as high as 380%. It is one of the current energy-saving heat source equipment. During use, safety, environmental protection and high efficiency are its main features.

Heart Parts. Compressor
As the heart component of the air source heat pump, the compressor is equivalent to the heart of the CPU and the human body of the computer. It can drive the circulation of refrigerant, realize the thermal expansion and condensation process, and make the refrigerant realize the physical changes of evaporation, heat absorption, condensation and heat release. Currently commonly used compressor brands include Copeland compressor, Hitachi compressor, Sanyo compressor and Otsu compressor, which are known as the four major brands in the industry. In the heat pump industry, Copeland brand compressors are the best.
GB/T1397-1988 Throttle valve device-capillary electronic expansion valve and thermal expansion valve
Throttle valves can generally be divided into capillary throttling valves, thermal expansion valve throttling valves (internal balance, external balance) and electronic expansion valve throttling. By changing the pressure change of the refrigerant, the liquefaction and vaporization process of the refrigerant can be realized, the superheat or temperature difference of the inlet and outlet air, the return air temperature and its set value can be detected and collected, and the opening of the expansion valve can be controlled through microprocessor processing. Spend. to meet system load requirements. The advantage of the electronic expansion valve is that it can accurately control the flow of refrigerant, thereby achieving precise control of the evaporation temperature. It is often used in situations where temperature control accuracy is high.
The electronic expansion valve can work normally above -70℃, but the small thermal expansion valve can only reach -60℃. Capillary tubes are used in small refrigeration systems (the structure is simple and cannot be adjusted, after all, the capillary tube is just a small copper tube);
Expansion valves are used in large and medium-sized refrigeration systems (the structure is relatively complex and adjustable). In addition to controlling the evaporator, it can also be used to regulate the condenser. Under allowed evaporation conditions, when the condensation pressure is too high, the expansion valve can be closed appropriately to reduce the flow of refrigerant in the system and reduce the condenser load, thereby reducing the condensation pressure and achieving effective and reliable operation of the air-energy water heater unit.