| 摘要 |
<p>PURPOSE:To eliminate hot water failure by providing an electric heater in a circulation pipe system communicating the bottom with the top of a hot water storage tank, heating water in the tank, and connecting an auxiliary tank between the heater and the storage tank. CONSTITUTION:Water collected from the bottom of a hot water storage tank 1 by a first pump 4 at the time of heating is heated by an electric heater 2, and further fed to the top of the tank 1 through an auxiliary tank 3. When such a circulation is repeated, the pump 4 and the heater 2 are stopped when a first sensor 7 detects that the water temperature in the tank 1 is heated to reach a suitable bathing temperature. On the other hand, when a detected temperature value by a second sensor 8 becomes a preset value or less at the time of supplying hot water, a second pump 5 is driven. Thus, the stored water in the tank 3 is supplied to the top of the tank 1, the mixture water of the hot water and the low temperature water at the top of the tank 1 is guided from a hot water outlet 1b to a hot water supply port 22. Thus, hot water failure can be eliminated.</p> |
