| 摘要 |
PURPOSE:To enable to fill a bathtub with hot water in a short time by a method wherein the hot water with adequate temperature produced at an instantaneous water heater is sent in the bathtub through both the feed pipe and return pipe of the circulating heating circuit of a bath. CONSTITUTION:A bypass pipe 22 with an ON-OFF valve A21 therein is provided between a return pipe 15, which connects a circulating pump 14 with a bathtub 12, and a feed pipe 11 on the upstream side of a check valve A20. At the same time, the tip of a hot water filling pipe is connected to the feed pipe 11 at a position lying between the check valve A20 and the bypass pipe 22. In addition, a water flow sensor 23 is provided between an ON-OFF valve B16 and a vacuum breaking valve 17. Both the return pipe 15 and the feed pipe 11 constitute a circulating circuit and the diameters of the pipes 15 and 11 are smaller than that of a hot water supplying pipe 6a. Further, a compound type hot water supplier locates above the bathtub 12. The flow rate is contrived to increase by constituting to set hot water through both the feed pipe and the return pipe of a circulating heating circuit by means of the bypass pipe and the ON-OFF valve A. |
