Special multi-water-temperature heat pump unit for swimming pool

According to the multi-water-temperature type heat pump unit special for the swimming pool, one end of a first heat exchanger is connected to the upper portion of a compressor through a first connecting pipeline, the other end of the first heat exchanger is connected to one end of a second heat exchanger through a second connecting pipeline, and the first heat exchanger is used for conducting first-time heat exchange on high-temperature gas in the compressor to generate high-temperature hot water; the other end of the second heat exchanger is connected to one end of the liquid storage tank through a third connecting pipeline, and is used for carrying out second heat exchange on the high-temperature gas subjected to the first heat exchange to generate low-temperature hot water; the other end of the liquid storage tank is connected to one end of the evaporator through a fourth connecting pipeline and used for feeding the cooled liquid refrigerant into the evaporator, and evaporation refrigeration is conducted t