| 摘要 |
<p>PURPOSE:To discharge a water vapor from a sub-tank without additionally providing a water vapor discharging pipe, by a construction wherein an inflow pipe for connection between a part near a hot water level in a main tank and a part near a lower part of the sub-tank is provided with an air hole at an uppermost part thereof in the sub-tank. CONSTITUTION:A partition plate 5 is provided in a lower part of a main tank 1 for reserving hot water, thereby forming a sub-tank 2, and a heater 6a as a heat source part 6 is provided in a lower part of the sub-tank 2. Hot water reserved in the sub-tank 2 is heated by the heat source part 6, whereby hot water in the main tank 1 can also be heated through conduction of heat. A part near the hot water level in the main tank 1 and a part near the lower part of the sub-tank 2 are connected to each other through an inflow pipe 3, and the hot water heated through heat conduction in the main tank 1 is permitted to flow into the sub-tank 2 through the inflow pipe 3. A water vapor generated by heating of the hot water in the sub-tank 2 is constantly discharged to the vicinity of the water level in the main tank 1 through an air hole 4 bored in the inflow pipe 3, so that it is unnecessary to separately provide a water vapor discharging pipe, and a solenoid valve can be omitted.</p> |
