| 摘要 |
<P>PROBLEM TO BE SOLVED: To cope with instantaneous hot water supply without a hot water reservoir, and to supply hot water with excellent energy efficiency. <P>SOLUTION: In a refrigerant piping 1 in which a refrigerant is enclosed and circulated to flow, a compressor 3 driven by an electric motor 2, a heat exchanger 4 for radiating heat of a high-temperature refrigerant from the compressor 3, an expansion valve 5 and an evaporator 6 are interposed in order to constitute an electric heat pump hot water supply apparatus 7. A water supply pipe 8 is introduced into the heat exchanger 4, whereby water flowing through the water supply pipe 8 is heated by heat radiated by the high-temperature refrigerant from the compressor 3. On the downstream side of the heat exchanger 4, the water supply pipe 8 is attached to a heating part 10 constituting a gas instantaneous water heater 9 to transfer heat. Thus, in supplying hot-water, heat is performed by the electric heat pump hot water supply apparatus 7, and when the initial rise is delayed so that hot water at a preset temperature is not obtained, heating is performed by the gas instantaneous water heater 9 to instantaneously supply hot water of a preset temperature. <P>COPYRIGHT: (C)2008,JPO&INPIT |
