The difference between the ultra-low temperature air source heat pump and the general air source heat pump is the natural environment temperature used by the heat pump unit. Because in China, the north and south levels are nearly 50 degrees, and the cross levels are wide. The vast majority of regions are in the north temperate zone, and a small part is in the subtropical zone, especially in winter, the temperature difference between the north and the south is large. The air energy heat pump uses gas as the heat source, and the temperature of the gas determines the heating capacity of the air energy heat pump generator unit. Due to the technical limitations of the compressor, the air energy heat pump at this stage is divided into normal temperature air energy heat pump, which is suitable for application at 43~- 7 ℃, and ultra-low temperature air energy heat pump, which is suitable for application at 43~- 25 ℃.
The difference between ordinary compressors and jet aircraft enthalpy-increasing compressors: jet aircraft enthalpy-increasing compressors have an additional air supply port than ordinary compressors. Steam generated by flash vaporizers and economic development devices enters the inner wall of the compressor from the newly raised air supply port of the compressor casing, reducing the temperature of the compressor exhaust pipe, reducing the length of the liquid phase heat transfer zone of the heat exchanger of the heat pump unit, increasing the total area of two-phase heat transfer, and improving the heat exchange efficiency of the heat exchanger. At the same time, the system software also improves the subcooling of the refrigerant in front of the throttle valve, allowing the refrigerant to digest and absorb more heat in the air-conditioning evaporator, thereby increasing the heating capacity of the low-temperature air source heat pump.
Due to the improvement of such ultra-low temperature technology, the application scope of the air energy heat pump has been expanded at this stage. Except for a few regions with extremely extreme natural environments, it has already covered 90% of the residential areas in China. It is true that both the North and the South are available, and both the North and the South are powerful
