VALVE DEVICE AND TOILET BOWL WASHING DEVICE

PROBLEM TO BE SOLVED: To provide a valve device and a toilet bowl washing device capable of suppressing increase in pressure.SOLUTION: A valve device includes a main valve 22 opening and closing a main valve hole 21 which communicates a water supply passage 86 with a downstream side water supply passage 87, a back pressure chamber 24 defined in a back surface side of the main valve 22, and a pilot valve 27 opening and closing a pilot flow passage 26 which communicates the back pressure chamber 24 with the downstream side water supply passage 87, and opens and closes the water supply passage. The valve device further includes relief flow passages 31a and 31b which are bypass flow passages for bypassing the pilot valve, and a relief valve 30 suppressing increase in a water pressure in the upstream side is provided in the relief flow passages 31a and 31b. The main valve 22 is opened by opening operation of the relief valve 30 when the water pressure is higher than a prescribed water pressure.SELECTED DRAWING: Figure 6 【課題】圧力上昇を抑制することができる弁装置および便器洗浄装置を提供する。【解決手段】弁装置は、給水路８６と下流側給水路８７を連通する主弁孔２１を開閉する主弁２２と、主弁２２の背面側に画成された背圧室２４と、背圧室２４と下流側給水路８７を連通させるパイロット流路２６を開閉するパイロット弁２７とを備え、給水路を開閉する。パイロット弁をバイパスするバイパス流路であるリリーフ流路３１ａおよび３１ｂを有し、リリーフ流路３１ａおよび３１ｂに、上流側の水圧上昇を抑制するリリーフ弁３０を設ける。所定水圧より高い時におけるリリーフ弁３０の開動作によって、主弁２２が開状態になる。【選択図】図６