| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hot water supply apparatus capable of improving the operation efficiency of a heat pump at a low outside temperature in winter or the like. <P>SOLUTION: This hot water supply apparatus includes: a heating heat exchanger 31 in which a water passage is connected to a hot water storing tank 21 through pipelines P15 to P17 with a first pump 32 interposed therebetween, and a heating water passage is connected to a hot water heater through pipelines P18 and P19 with a second pump 33 interposed therebetween; a radiating heat exchanger 35 enabling a heat pump HP to exchange heat with an evaporator 17; and a passage switching circuit (a three-way switching valve 34 and pipelines P20, P21) for feeding water which is already subjected to heat exchange and delivered from the water passage of the heating heat exchanger 31 into the radiating heat exchanger 25 at need. <P>COPYRIGHT: (C)2008,JPO&INPIT |
