| 摘要 |
PURPOSE:To make the structure simple and reduce the maintenance cost a great deal by placing a heat exchange section of the circulation channel of a hot water tank in a hot water device and raising the temperature to a set temperature indirectly by using midnight electric power and compensating for the heat exit thereafter by the heat from a hot water storage tank. CONSTITUTION:The circulation channel of a bath tub 5 is formed by a suction pipe 1, pump 2, filter section 3 and outlet pipe 4, and this filter section 3 is placed in a hot water storage tank. The temperature of the hot water in the hot water storage tank 6 rises up to 85 deg.C by the electricity of the midnight electric power and at this time a pump 2 is operated to circulate the water in a bath tub. The bath tube water flowing in the direction of the arrow mark raises its temperature by the heat received from the high temperature water. By this circulation the temperature of the bath tube water rises gradually. When the temperature reaches a set temperature, the pump 2 is stopped. Series of those actions are conducted automatically. If, for example, the temperature of the bath tub is set at 42 deg.C, the temperature of the water is raised through the circulation, and during night it is maintained at this temperature. The inside of the filter section 3 which also functions as a heat exchange section reaches high temperature, and live fungi caught in a ceramic film filter 7 will be killed.
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