| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a hot-water storage type hot-water supply device capable of preventing heated hot water from being discharged when an abnormal pressure acts. <P>SOLUTION: This hot-water storage type hot-water supply device is provided with a hot-water storage tank 4 storing hot water by connecting a water in pipe 6 with a hot-water out pipe 5 and a heating means 2 heating hot water in the hot-water storage tank 4. Pressure relief valves 16, 17 are provided in the water-in pipe 6 and the hot water-out pipe 5, respectively. Since the pressure relief valve 16 on a water in pipe 6 side is operated at lower pressure than pressure of the pressure relief valve 17 on a hot-water out pipe 5 side, water is discharged together with abnormal pressure when abnormal pressure acts in the device. Consequently, it is possible to avoid waste of valuable hot water boiled by utilizing inexpensive electric power in the middle of night, supply hot water efficiently, achieve economical performance, and avoid an abnormal condition surely to enable safe use always. <P>COPYRIGHT: (C)2004,JPO</p> |
