Patent ID: 6837443

Claim:
A heat pump hot-water supply system, comprising: a compressor, a first heat exchanger for heat-exchange between a refrigerant discharged from the compressor and water, a pressure reducing unit for reducing the pressure of the refrigerant from the first heat exchanger, a second heat exchanger located between the pressure reducing unit and the compressor, a hot-water supply tank for holding water heated by the first heat exchanger, and a water circulating route followed by water, which is supplied from the hot-water supply tank, back to the hot-water supply tank via the first heat exchanger; the heat pump hot-water supply system mixing hot water supplied from the hot-water supply tank with water, which is supplied from a water supply pipe and heated by the first heat exchanger according to a heating condition of the first heat exchanger for heating water, and supplying the mixed water to a using end unit.