| 摘要 |
<p>PURPOSE:To prevent the discharge of cool water at the early time of hot water supply by providing a source stop valve at the water supply part of a hot water tank and projecting hot water feed piping whose edge has a spout from the hot water tank to provide a volume variable device to a part of the hot water tank. CONSTITUTION:At the time of hot water supply, a source stop valve 3 is opened to discharge hot water of a hot water tank 1 from a spout 4 of hot water feed piping 5. At this time, a valve body 6a is actuated so that the open actuation of the source stop vale 3 may be interlocked to drive a driving device 6b of a volume variable device 6 to lessen the volume of the hot water tank 1. On the other hand, when the source stop valve 3 is closed, hot water supply is stopped and this is interlocked to enlarge the volume of the hot water tank 1 by the use of the volume variable device. Thereby remaining hot water of the hot water feed piping 5 is returned to the hot tank 1, and, until the hot water supply is performed next, the hot water in the hot water feed piping 5 remains not to be cooled. Accordingly cool water is not supplied at early time of the next hot water supply.</p> |
