Flushing water supply control valve used in power-off state and toilet flushing assembly

Abstract

A flushing water supply control valve used in a power-off state and a toilet flushing assembly comprise a housing, a water control component, a blocking component and a switch component, the housing is provided with a water inlet part, a water outlet part, a pressure chamber, an auxiliary chamber and several drainage channels; the water control component comprises an adjusting seat, a movable valve sleeve, a first elastic member and an elastic switching structure, and the adjusting seat is installed in the pressure chamber; the movable valve sleeve moves in the pressure chamber under the action of water pressure and the first elastic member, and an acting surface cooperating with the elastic switching structure is formed thereon.

What is claimed is: 
     
         1 . A flushing water supply control valve used in a power-off state comprising a housing, a water control component, a blocking component and a switch component,
 wherein the housing is provided with a water inlet part, a water outlet part, a pressure chamber, an auxiliary chamber and several drainage channels, the auxiliary chamber is provided for accommodating the switch component and connecting and disconnecting the pressure chamber and the water inlet part, the pressure chamber is provided for accommodating the water control component, the blocking component is installed at a position between a water inlet position of the water outlet part and the pressure chamber, and pressure relief and water drainage in the pressure chamber and the auxiliary chamber are respectively realized by the drainage channels;   the water control component comprises an adjusting seat, a movable valve sleeve, a first elastic member and an elastic switching structure, the adjusting seat is installed in the pressure chamber and is provided with a channel connecting the blocking component and the pressure chamber, the movable valve sleeve moves in the pressure chamber under the action of water pressure and the first elastic member, and an acting surface cooperating with the elastic switching structure is formed on the movable valve sleeve, two ends of the first elastic member act on the adjusting seat and the movable valve sleeve respectively, the elastic switching structure is installed on the adjusting seat and abuts and cooperates with the acting surface of the movable valve sleeve, and as a position of the movable valve sleeve in the pressure chamber changes, the channel is opened and closed at least twice;   the blocking component opens and closes the water inlet of the water outlet part according to the pressure change of the pressure chamber;   the switch component is installed on the housing and is used for fulfilling and cutting-off the connection between the water inlet part and the pressure chamber.   
     
     
         2 . The flushing water supply control valve used in a power-off state as claimed in  claim 1 , wherein, when the pressure chamber is filled with water and the switch component is in a closed state, the blocking component sequentially opens the water outlet part. 
     
     
         3 . The flushing water supply control valve used in a power-off state as claimed in  claim 2 , wherein the elastic switching structure includes a movable frame, an abutting member and a second elastic member, the movable frame is swingably installed on the adjusting seat through a hinge member provided on the movable frame, one side of the movable frame is used for opening and closing the channel, and another other side of movable frame cooperates with the second elastic member through the abutting member and acts between the adjusting seat and the movable valve sleeve to make the abutting member abut against the acting surface, wherein the movable valve sleeve moves along the pressure chamber with the acting surface on an inner wall of the movable valve sleeve contacting and cooperating with the abutting member, thus making the abutting member swing according to the position change of the abutting member on the acting surface and driving the movable frame to open and close the channel. 
     
     
         4 . The flushing water supply control valve used in a power-off state as claimed in  claim 3 , wherein the acting surface is arranged in a wave shape and at least two docking positions are formed thereon, wherein, when the movable valve sleeve axially moves and the abutting member radially abutted falls on the at least two docking positions formed on the acting surface, the channel is opened or blocked, and the blocking component is thus driven to open or block the water outlet part. 
     
     
         5 . The flushing water supply control valve used in a power-off state as claimed in  claim 4  further comprising a V-shaped sealing member sleeved on an outer circumferential groove of the movable valve sleeve and acting on an inner side of the pressure chamber to make the movable valve sleeve axially and hermetically move in the pressure chamber. 
     
     
         6 . The flushing water supply control valve used in a power-off state as claimed in  claim 4 , wherein the blocking component includes a sealing lip piece for covering the water inlet of the water outlet part, a first pressure stabilizing chamber is formed between the adjusting seat and the water outlet part by separation of the sealing lip piece, and the first pressure stabilizing chamber is connected to the channel of the adjusting seat, wherein the sealing lip piece is provided with a drainage hole connecting the first pressure stabilizing chamber and the water inlet part. 
     
     
         7 . The flushing water supply control valve used in a power-off state as claimed in  claim 4 , wherein the switch component includes a sealing diaphragm, a second pressure stabilizing chamber and a driving assembly, and the sealing diaphragm is installed in the auxiliary chamber and covers an inlet of the pressure chamber, and is provided with a water passing hole connecting the water inlet part and the second pressure stabilizing chamber, the driving assembly is actuated by external force to open and close the water passing hole, changing pressure on two end faces of the sealing diaphragm to make the water inlet part and the pressure chamber be connected or disconnected. 
     
     
         8 . The flushing water supply control valve used in a power-off state as claimed in  claim 7 , wherein the driving assembly includes a connecting rod, a third elastic member and a deformation member, an end of the connecting rod is used for opening and closing the water passing hole, and another other end is connected to the deformation member, the deformation member moves towards a direction of the water passing hole under an action of air pressure and drives the connecting rod to open the water passing hole to change the pressure on the two end faces of the sealing diaphragm, wherein the elastic member is used to drive the connecting rod to return to the original position and block the water passing hole, and the drainage channels are connected to the water passing hole. 
     
     
         9 . The flushing water supply control valve used in a power-off state as claimed in  claim 8  further comprising an air pressure switch installed outside the water tank and hermetically connected to the housing through an air pipe and acting on the deformation member through air pressure. 
     
     
         10 . The flushing water supply control valve used in a power-off state as claimed in  claim 1 , wherein the drainage channels comprises a first drainage channel, a second drainage channel and a third drainage channel, the first drainage channel is used for discharging the water flow in the auxiliary chamber, the second drainage channel is connected to the channel for discharging the water flow in the first pressure stabilizing chamber, and the third drainage channel is connected to the pressure relief chamber for discharging the water flow in the pressure relief chamber. 
     
     
         11 . The flushing water supply control valve used in a power-off state as claimed in  claim 10 , wherein a flow regulating valve is also installed in the third drainage channel for adjusting a water outlet area of the third drainage channel to regulate a discharge speed. 
     
     
         12 . A toilet flushing assembly comprising a triangle valve, a water pump, a waterway switching valve, a connecting pipe and the flushing water supply control valve as claimed in  claim 1 , wherein the water inlet part of the flushing water supply control valve is connected to the municipal pipeline, and the water outlet part is connected to the triangle valve, the water pump, the flushing water supply control valve and the waterway switching valve are respectively connected to the triangle valve, so that the water pump and the flushing water supply control valve intermittently supply water to the waterway switching valve.