| 摘要 |
PURPOSE:To remove flood water from a water feed port or absorption of air therefrom so as to stably feed water and hot water by opening or closing an automatic water feed valve in accordance with 'ON' or 'OFF' of a water level switch provided at the expanded portion of a pipe such as a water feed pipe or the like. CONSTITUTION:Feed water or feed hot water at the time of opening an automatic feed water valve 1 is received by a funnel-shaped water feed port 2, and reaches a three-way valve 4 via a pipe expanded portion 10 and a water feed pipe 3, said pipe expanded portion being provided in midway of said water feed pipe 3. Then, feed water or feed hot water is sucked up by means of circulation pump 7 and is introduced into a heat exchanger 8, a bathtub inlet pipe 9, a bathtub 5 in this order. When the water level within the pipe expanded portion 10 rises up, a water level switch 11 is turned OFF. In linkage therewith, the automatic water feed valve 1 is closed, and hence feed water or the like does not flow out of the water feed port 2. Further, when the water level within the pipe expanded portion 10 is lower than a predetermined water level and the water level switch 11 is in 'ON' state, the automatic water feed valve 1 is opened, and hence water feeding is carried out stably. |
