| 摘要 |
<P>PROBLEM TO BE SOLVED: To avoid the generation of backflow of bath water caused by closing a hot-water feeding solenoid valve in advance to a vacuum break valve in an upstream, in applying vacuum, when feeding hot water from a hot-water circuit into a bath side. <P>SOLUTION: The hot-water feeding solenoid valve 52 is formed into structure capable of propagating water supply pressure from the hot-water circuit and a flow port 523 to a diaphragm chamber 525 by a bleed hole 524c, and capable of maintaining a closed condition by pushing a diaphragm valve 524 to a valve seat 521 at the tip of an inner cylinder part 522 with the atmospheric pressure acting thereon by the water supply pressure of the diaphragm chamber, while communicated with the bath side. A closing energizing spring 529 constituted of a compression coil spring is arranged in the diaphragm chamber, and the diaphragm valve is elastically energized thereby to keep the diaphragm valve in the closed condition until the vacuum break valve starts an air intake operation, even when an inside of the diaphragm chamber is brought into negative pressure. A check hole is incorporated in the bleed hole to block the bleed hole in applying the vacuum. <P>COPYRIGHT: (C)2007,JPO&INPIT |
