Abstract: A heat pump system for air conditioning adaptable to cold regions, comprising a compressor, a condenser, a thermal expansion valve and an evaporator and forms a closed circuit. The structure features that said compressor is a scroll compressor, and a supplementary inlet is provided on the working chamber of the compressor. A subcooler is provided between the condenser and the expansion valve, thus forming a closed circuit with an electromagnetic valve and an electronic expansion valve for supplementary refrigerant vapor to the supplementary inlet of the compressor. Compared to the prior art, the present invention is simple in structure, easy to manufacture and assemble, highly effective in energy utilization and low cost, and the system can operate in low temperature environment with stability and reliability. Therefore, it is particularly suitable for popularization and application in cold regions.

Abstract: A heat pump system for air conditioning adaptable to cold regions, comprising a compressor, a condenser, a thermal expansion valve and an evaporator and forms a closed circuit. The structure features that said compressor is a scroll compressor, and a supplementary inlet is provided on the inlet side of the compressor. A subcooler is provided between the condenser and the expansion valve, thus forming a closed circuit with an electromagnetic valve and an electronic expansion valve for supplementary refrigerant vapor to the supplementary inlet of the compressor. Compared to the prior art, the present invention is simple in structure, easy to manufacture and assemble, highly effective in energy utilization and low cost, and the system can operate in low temperature environment with stability and reliability. Therefore, it is particularly suitable for popularization and application in cold regions.