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1. (WO2015043080) TIME DELAY AUTOMATIC CLOSING VALVE NOT AFFECTED BY WATER QUALITY

Pub. No.:    WO/2015/043080    International Application No.:    PCT/CN2013/088854
Publication Date: Fri Apr 03 01:59:59 CEST 2015 International Filing Date: Tue Dec 10 00:59:59 CET 2013
IPC: F16K 21/04
Applicants: WU, Yuegang
吴跃刚
Inventors: WU, Yuegang
吴跃刚
Title: TIME DELAY AUTOMATIC CLOSING VALVE NOT AFFECTED BY WATER QUALITY
Abstract:
A time delay automatic closing valve not affected by water quality comprises a valve body consisting of a valve base (1) and a valve cover (2). A movable membrane (3) dividing an inner cavity of the valve body into a first cavity (12) and a second cavity (13) is disposed in the valve body. The membrane (3) is provided with a thin water channel penetrating through the membrane (3). The first cavity (12) is connected to a water inlet channel (11). A water outlet channel (14) and the first cavity (12) are located on a same side of the membrane (3). The membrane (3) covers a channel opening of the water outlet channel (14) to separate the water outlet channel (14) from the first cavity (12). The second cavity (13) is provided with a pressure relief water channel (131, 141). The pressure relief water channel (131, 141) is provided with a ceramic valve core switch. A valve core penetrating through a negative pressure cavity (21) is movably disposed in the valve cover (2). The valve core drives the ceramic valve core switch to move. The time delay automatic closing valve separates the negative pressure cavity for forming vacuum from the water channel for water to pass through, thereby preventing impurities in water from affecting the work of the negative pressure cavity, overcoming the defect that the service life of an existing automatic closing faucet valve is short, and effectively extending the service life of the valve.