| 摘要 |
PROBLEM TO BE SOLVED: To prevent the leakage of water even when water suddenly flows into a valve chamber through an inflow port. SOLUTION: The valve chamber 3 having the inflow port 4 opened on a lower part and an outlet 5 opened on an upper part is formed of a casing comprising a body 1 and a lid 2. A valve seat 6 is formed between the valve chamber 3 and outflow port 5. The body 1 integrally contains a plurality of ribs 9 projecting inward on the inner wall of the valve chamber 3. A bottomed float receiver 10 which is formed in an almost cylindrical shape and provided with a through-hole 11 with a small opening area for communicating between the inside and outside is fixed to the inside of the rib 9. A spherical float 12 is arranged in the float receiver 10 in a free state. The bottom of the float receiver 10 contains a communication hole 13 with a large opening area for communicating between the inside and outside thereof and a water flow receiving member 14 for opening and closing the communication hole 13. While the water flow receiving member 14 opens the communication hole 13 by the force of water suddenly flowing through the inflow port 4 into the valve chamber 3, the float 12 is displaced to the outflow port 5 side. COPYRIGHT: (C)2009,JPO&INPIT
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