Patent ID: 6874694
Filing Date: 2005-04-05
Classification: F24D,F25B,Y02B

Abstract:
1. 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, and a hot-water supply tank for holding water heated by the first heat exchanger; the heat pump hot-water supply system further comprising: an additional heating tank route followed by water, which is kept in the hot-water supply tank, back to the hot-water supply tank via the first heat exchanger, a hot-water supply tank route supplying hot water, which is kept in the hot-water supply tank, to a using end unit, and a direct hot-water supply route supplying directly water from a water supply pipe to a using end unit via the first heat exchanger; the heat pump hot-water supply system having an operation mode switch function supplying hot water through the hot-water supply tank route right after use of hot water is started at the using end unit and then supplying hot water through only the direct hot-water supply route.