| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hot water storage type water heater comprising a circulation pipe conduit for heating-up and a circulation pipe conduit for heat source, circulating hot water in the circulation pipe conduits by one circulation pump, and improving utilization efficiency of hot water. <P>SOLUTION: In constituting this hot water storage type water heater 70 comprising the circulation pipe conduit 20 for heating-up and the circulation pipe conduit 40 for heat source, a first common pipe conduit portion CL<SB>1</SB>is disposed in an area positioned at an upstream side of the heat exchanger 62 for heating-up and a downstream-side of a secondary utilization-side heat exchanger 35, and a second common pipe conduit portion CL<SB>2</SB>is disposed in an area positioned at a downstream side of the heat exchanger for heating-up and an upstream-side of the secondary utilization-side heat exchanger, the first common pipe conduit portion is provided with a first control valve 22 for joining the circulation pipe conduit for heating-up and the circulation pipe conduit for heat source, the circulation pump 24 and a second control valve 26 for branching the circulation pipe conduit for heat source from the circulation pipe conduit for heating-up, successively disposed from the upstream side in this order, and one end of the second common pipe conduit is connected with an upper portion of the hot water storage tank 10. <P>COPYRIGHT: (C)2009,JPO&INPIT |
