| 摘要 |
<p>PURPOSE:To reduce costs and prevent the amount of hot water supplied through a hot water supply hole from being restricted by making it possible to supply high temperature hot water through the hot water supply hole even if the amount of the hot water held in the upper part of a thermally insulated reservoir of an electric hot water heater becomes small and omitting a pressure reducing valve. CONSTITUTION:When hot water 13 is used, cold water 14 flows with a rush through a water supply hole 7. A heat insulating means 8A having a specific gravity smaller than that of the cold water 14 and greater than that of the hot water 13 is provided between the hot water 13 held in the upper part of a thermally insulated reservoir 2 and the cold water 14 held in the lower part of the thermally insulated reservoir 2. Even if the amount of the hot water 13 held in the upper part of the thermally insulated reservoir 2 becomes small, regardless of water flow, the high temperature hot water 13 can be supplied through a hot water supply hole 6 without being restricted by a pressure reducing valve.</p> |
