| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve a problem that, when a hot water heated at a heat exchanger for hot-water supply is made to flow from a hot-water filling passage to a re-heating circulation passage in a conventional water heater having a hot-water supply function, a re-heating function, an air heating function and a hot-water filling function, the hot water flowing from the hot-water filling passage flows into a heat exchanger for re-heating which is part of the re-heating circulation passage, thus resulting in the heated hot water at a high temperature flowing out to a bath side. <P>SOLUTION: A water heater 1 has the hot-water filling passage 32 for making a hot water heated at the heat exchanger 20 for hot-water supply flow into the re-heating circulation passage 46, the hot-water filling passage 32 diverges before communicating with the re-heating circulation passage 46, and a diverged first hot-water filling passage 33 communicates between the heat exchanger 40 for re-heating and a circulation pump 50, and a diverged second hot-water filling passage 34 communicates at an upstream side of the heat exchanger 40 for re-heating, and the second hot-water filling passage 34 which communicates at the upstream side of the heat exchanger 40 for re-heating has a reverse flow preventing means 35 for preventing the hot water from flowing in a direction opposite to a direction of a flow of hot-water filling. <P>COPYRIGHT: (C)2012,JPO&INPIT |
