The invention discloses a heat pump unit. The heat pump unit comprises a compressor, a reversing assembly, a first heat exchanger, a second heat exchanger, a heat recoverer, an adjusting valve and a controller; the compressor is provided with an exhaust opening and an air returning opening, the reversing assembly is provided with a first valve port, a second valve port, a third valve port and a fourth valve port, the first end of the first heat exchanger is connected with the second valve port, the first end of the second heat exchanger is connected with the third valve port, and the first heat exchanger is connected with the second heat exchanger; the heat recoverer comprises a refrigerant flow path and a water flow path which carry out heat exchange, the first end of the refrigerant flow path is connected with the first valve port, a first port of the adjusting valve is connected with the exhaust opening, a second port is connected with the first valve port, a third port is connected with the second end of the refrigerant flow path, and the opening degree of the second port and a third port of the adjusting valve is adjustable; the controller is electrically connected with the adjusting valve to control the opening degree of the second port and the third port of the adjusting valve. According to the heat pump unit, the flow of a refrigerant flowing to the heat recoverer can be adjusted within 0 to 100%.