| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hot water supply device capable of reducing pressure loss of a hot water supply circuit as a whole while maximizing heat efficiency in a hot water supply circuit applying a combustion burner as a heat source and constituted to receive heat distribution through a circulation circuit. <P>SOLUTION: This hot water supply device includes a first auxiliary heat exchanger 31 performing liquid-liquid heat exchanger while applying the water of high temperature of a heating circuit 2 heated by the combustion burner 52 as a heat source, and a second auxiliary heat exchanger 32 recovering latent heat from a combustion exhaust gas in a main heat exchanger 21. The water supplied from a water supply pathway 33 is distributed to the first auxiliary heat exchanger through a first branched water supply pathway 33a and to the second auxiliary heat exchanger through a second branched water supply pathway 33b in parallel, the supplied water preheated by the second auxiliary heat exchanger is joined to a hot water supply pathway 34 at a downstream side of the first auxiliary heat exchanger. A flow rate adjustment valve 36 is disposed in a hot water supply connection pathway 35 so that a distribution ratio can be changed and adjusted. <P>COPYRIGHT: (C)2010,JPO&INPIT |
