| 摘要 |
PURPOSE:To have a bath comfortably while performing additional combustion to the bath by connecting a junction pipe to an intermediate position of a return pipe to supply the hot water in a bath tub to the return pipe from the junction pipe and providing the junction pipe with a pump which merges the hot water from the bath tub with the hot water returned from a boiler. CONSTITUTION:When a boiler 2 for additional combustion is operated, the hot or cold water in a bath tub 1 flows into the boiler 2 from an out-going pipe 3 to be heated and it is returned to the bath tub 1 from a return pipe 4. At this time, the hot water which is heated in the boiler 2 and returned to the return pipe 4 has a high temperature, but because a pump 5 is started as soon as the boiler is operated, the low temperature water in the bath tub 1 flows into the return pipe 4 from a junction pipe 6 so that the hot water is mixed with the low temperature water and the water with its temperature lowered it flows into the bath tub 1 from the return pipe 4. Because the hot water heated in the boiler 2 is mixed with the low temperature water in the bath tub 1 before it returns to the bath tub 1 to have its temperature lowered, it can be prevented that the hot water near the outlet of the return pipe 4 is hot with a high temperature and this gives to the user of the bath tub 1 unpleasant feeling or burn by hot water.
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