Four-in-one air-cooled heat pump unit

The utility model belongs to the technical field of refrigeration and air conditioning equipment, in particular to a four-in-one air-cooled heat pump unit with multiple functions such as refrigeration, heating, and domestic water heating. Both a water side heat exchanger and a wind side heat exchanger can serve as condensers or evaporators; a heat regenerator can serve as a condenser; the air-cooled heat pump unit provided with four functions can be formed by combining a four-way valve, a heat recovery valve, and one-way valves; and the four functions are 1, refrigeration; 2, refrigeration and total heat recovery; 3, independent domestic water heating; and 4, heating. The utility model has the advantages that hot water total heat recovery during the refrigeration of the heat pump unit is realized; the heating of water is zero cost; hot water can be produced at all seasons; and the problem that water can not be heated when the use side of an air conditioner is not in use is solved.