Multi-functional heat pump air-conditioning water heater

The utility model relates to a multi-functional heat pump air-conditioning water heater. A compressor is sequentially connected with a hot water exchanger, a first reversing valve, a second four-way reversing valve, a first one-way valve, a liquid storage tank, a filter, a thermal expansion valve, a fourth one-way valve and an outdoor heat exchanger through pipelines. A water outlet end of the hot water exchanger is connected with a circulating water inlet end of a heat storage water tank through water pipelines, and a circulating water outlet end of the heat storage water tank is connected with a water inlet end of the hot water exchanger through a water pump by the water pipelines. A pipeline is in parallel connection between two four-way reversing valves. A pipeline is arranged between the fourth one-way valve and the thermal expansion valve and passes an electromagnetic valve, the fourth one-way valve and an indoor heat exchanger in sequence to be connected with the second four-way reversing valve. By means of reversing of the four-way reversing valves and alternative on-off of the electromagnetic valve, running in five modes including system hot water supplying, air conditioner refrigerating, air conditioner refrigerating and hot water supplying, air conditioner heating, and air conditioner heating and hot water supplying is achieved. Moreover, various working conditions all achieve the effects of high-efficiency and energy-saving.