Heat recovery type efficient low temperature air-source heat pump system

The utility model relates to a heat recovery type efficient low temperature air-source heat pump system. The heat recovery type efficient low temperature air-source heat pump system comprises the components of a compressor, an evaporator, a condenser and the like. The heat recovery type efficient low temperature air-source heat pump system is characterized in that an evaporator pipeline which improves the system is arranged in the heat recovery type efficient low temperature air-source heat pump system, an inner pipe is additively arranged in an evaporator coiler, and a set of energy storing device is additively arranged in the evaporator coiler; when the outer door environment temperature is low or the evaporator frosts, the system can heat the heat-transfer oil through the working medium waste heat and drainage working medium condensation and heat releasing, the heat-transfer oil is conveyed into the inner pipe of the evaporator, the heat-transfer oil transfers the heat to the working medium through inner pipe heat transfer pins, and the working medium is promoted to evaporate. The heat recovery type efficient low temperature air-source heat pump system has the advantages that the evaporation efficiency of the working medium in the evaporator can be improved effectively, the evaporation capacity of the working medium in the evaporator can be improved, and the normal, stable and efficient operation of the heat pump system at low temperature or with the frosting of the evaporator can be realized ultimately.