| 摘要 |
PURPOSE:To make possible to supply clean hot water, by providing a hot water circuit that leads hot water in an upper part of a hot water supplying apparatus via a heat exchanger into a lower part of said hot water supplying apparatus, in a system that has a hot water supply function and also allows water in a bathtub to be heated by hot water in the system. CONSTITUTION:The hot water supplying apparatus 3 equipped with a heating section 4 is connected with a water pipe via a pressure-reducing check valve 1, and can deliver hot water through a hot water piping 15 connected to the upper part of the hot water supplying apparatus 3 and equipped with a safety valve 2 to a hot water supply tap 16 or the like. The upper part 5 of the hot water supplying apparatus is connected via a piping 6 to a circulating pump 7 that is, in turn, connected via a piping 8, the heat exchanger 9 and a piping 10 to the lower part of the hot water supplying apparatus. The heat exchanger 9 has a reservoir 27 provided with connecting openings 20, 21 that are in communication with the bathtub 13 via communication pipes 11, 12. A heating pipe 24 having a plurality of fins 25 around it is housed in the reservoir 27. The hot water outlet 16' of the hot water supply tap 16 is positioned at a level higher than a position 14 at which the bathtub 13 is filled with hot water. |
