| 摘要 |
PURPOSE:To make it possible to fill a bath tub installed on the second floor with hot water without opening its lid by connecting a flow passage form a hot water supplier to a return flow passage form a bath tub to a heat exchanger for bath through a switching valve and providing a pump upstream of the switching valve. CONSTITUTION:A bath tub 1 and a heat exchanger 2 for bath are connected through a hot water supply passage 3 and a hot water return flow passage 4. A hot water supplier 5 and the return-flow passage 4 are connected via a switching valve 6, and a pump 7 is provided in the return flow section 4 from the switching valve 6 to the heat exchanger 2 for bath. With this arrangement manipulation of the switching valve 6 allows to stop return flow of the hot water from the bath tub 1 as well as to supply the hot water from the hot water supplier 5 through the water passage for an additional heating unit by opening the flow passage from the hot water supplier 5 to the heat exchanger 2 for bath and driving the pump 7. Accordingly the hot water can be supplied to the bath tub 1 on the second floor with its lid closed, and in this case the hot water form the hot water supplier 5 can be reheated by the heat exchanger 2 for bath. |
