| 摘要 |
PURPOSE:To obtain a water heating device, utilizing the waste hot-water of bath and saving energy, by a method wherein the reserving tank of city water is provided with a heat exchanger utilizing the waste hot-water of bath and an auxiliary heater. CONSTITUTION:The city water 25 is reserved in a water reserving tank 2 and the waste hot-water of the bath is introduced into a heat exchanger 3 through a conduit 16 by opening an opening and closing valve 15 after the bath is used in order to retrieve the carrying heat of the waste hot-water. Subsequently, a opening and closing valve 19 is opened to discharge the waste hot-water. In this case, when the temperature of reserved water is lower than a desired temperature, the water is heated by an auxiliary heater 4 to assist the heating for the water. Thus, the reserved water, whose temperature is increased, is supplied through a hot-water supplying pipe 32. According to this method, the water heating device, utilizing the waste heat of the bath and saving energy, may be obtained. |
