| 摘要 |
PURPOSE:To prevent invasion of the air to a circulating passage side of bath temperature keeping function and invasion of hot water from the circulating passage side of the bath temperature keeping function by providing valve forcibly moving means for maintaining a first air charge valve in a suitable state according to whether a position of a bathtub is lower than a break-off valve device or not. CONSTITUTION:When a bathtub 20 is lower than a break-off valve device 90, a first air charge valve 96a is closed by valve forcibly moving means 98 to break OFF a water flow. When the bathtub 20 is higher than the device 90, the valve 96a is closed at the time of supplying hot water, and opened at the time of supplying no hot water. When hot water supply is finished, the valve 96a is opened to introduce the air into an overflow chamber 93, thereby breaking off the water flow. At the time of supplying no hot water, even if bathtub water is invaded from the passage 30 side, it can be overflowed from the chamber 30 through an air charge port 93a, and hence invasion to a hot water supply passage 51 can be prevented. |
