| 摘要 |
PURPOSE:To eliminate the danger of no-water burning and realize a large capacity while employing a tap-controlled water heater and a bath heater simultaneously in combination by a method wherein a hot-water pouring pipe is communicated with an upper circulating pipe, providing with a reverse flow preventing valve, at the side of a heat transfer tube and a circulating pump is provided while arranging the suction port thereof in an outlet water tube boiler section and arranging the delivery port thereof in a lower circulating pipe. CONSTITUTION:Hot-water, outputted from a tap-controlled hot-water heater, is poured into a hopper 6 through a hot-water delivery pipe 2, a hot-water pouring valve 4 and another hot-water delivery pipe 5 and is guided between an upper circulating pipe 9 and an inlet water tube boiler section 8 by a hot-water pouring pipe 7. The upper circulating pipe 9 is provided with a reverse flow preventing valve 17, therefore, all of hot-water, poured into a bathtub 10 through a lower circulating pipe 13, can be heated by a bath heater B. In case water is remaining in the bathtub 10, a pump 16 is operated and when the flow amount of the pump is larger than the flow amount of the poured hot-water, the reverse flow preventing valve 17 is opened and hot-water from the hot-water pouring pipe 7 and water from the bathtub 10 are sent into a heat transfer tube 11 whereby they are heated by the bath heater B and are circulated. |
