| 摘要 |
<p>A constant flowrate water saving valve is applicable to a fluid discharge part such as a shower head and discharges a sucked-air mixed water, which presents a feeling of large flow, in a water saving state even when a city water tap is fully opened. A constant flowrate water saving valve comprises a valve body (2) having a peripheral wall (5) formed with a conical-shaped valve seat surface (4), which is varied in diameter from an inner diameter r1 to an inner diameter r2 (r1 > r2), a fluid inlet opening (6) on a side of the inner diameter r1, a vent flow opening (7) on a side of the inner diameter r2 and a plurality of fluid radiant outflow openings (9) extending, while intersecting in an axial direction with predetermined angular spacings, along the peripheral wall, and a movable valve disc (3) received in the valve body to be movable in the axial direction, the valve being such that when the movable valve disc is fully seated on the conical-shaped valve seat surface in the valve body, a fluid inlet opening side portion of the valve body communicates with an outside through respective upper edge side opening portions (9A) of the plurality of fluid radiant outflow openings and a vent flow opening side portion of the valve body communicates with an outside through respective lower edge side opening portions (9B) of the plurality of fluid radiant outflow openings, and a shower head uses the constant flowrate water saving valve.</p> |
