COVER PRESSURE DRAINAGE DEVICE FOR FLUSH TOILET

PROBLEM TO BE SOLVED: To improve performance by connecting a cover pressure pump and a service water distributing pipe via a fluid controller. SOLUTION: A rectilinear switch 21 is operated to open and a fluid valve 24 and a check-valve 25 of a fluid controller 2 are closed and opened respectively so that water is made to flow from a service water injection port 1 to a pumping part 32 of a cover pressure pump 3 via a conduit. Secondly, a control valve 5 and a control valve 6 are closed and opened respectively by a sensor 7 and a piston 34 is pushed out to the cover pressure container part 31 side so that the water in the container 31 flows into a toilet seat 4 by the service water pressure. Thirdly, the piston 34 abuts on a stopper 36 and the control valve 5, the control valve 6 are opened and closed respectively by the sensor 7, and a reversing switch 22 is positioned in a closed direction so that a check valve 25 is closed. The service water enters from the conduit 11 to the container 31, and the piston 35 is pushed out the pumping part 32 side and abuts against the stopper 37 so as to be stopped so that the water in the pumping part 32 is returned through a conduit 12 to the conduit 11 side. This constitution can strengthen the force of removing muck, save the using quantity of water, and eliminate any limit of a place in installing it.