Flush valve

Abstract

The utility model relates to the technical field of flush valves, and discloses a flush valve which comprises a valve body, a water inlet channel and a water outlet channel are arranged on the valve body, a water outlet cavity communicated with the water outlet channel is further arranged in the valve body, and a sealing assembly is arranged between the water inlet channel and the water outlet cavity. A back pressure cavity communicated with the water inlet channel is defined by the sealing assembly and the inner wall of the valve body, a pressure relief channel is arranged between the back pressure cavity and the water outlet cavity, and an electromagnetic control assembly used for controlling the pressure relief channel to be opened or closed is further arranged on the valve body. The sealing assembly is arranged in the valve body and enables the valve body to keep constant pressure, the valve body can automatically release pressure when the electromagnetic control assembly is powered on, and therefore the water outlet channel of the valve body can have large water pressure, and impulsive force is sufficient. Meanwhile, a sealing ring on the sealing assembly enables the valve body to have good sealing performance, water flow is prevented from overflowing, and sealing is safe and reliable.

Description

Technical Field

[0001] The utility model belongs to the technical field of flush valves, and specifically relates to a flush valve. Background Art

[0002] At present, solenoid valves are usually used to control the on-off of water flow in intelligent sanitary wares on the market. The solenoid valves are convenient and timely in controlling the on-off of water flow, and are deeply favored by processing manufacturers. In the actual use process, the water pressure in the water pipe is sometimes unstable, resulting in high water pressure or low water pressure; existing solenoid valves can often withstand high water pressure, but there are many connecting fittings in the valve body, and the sealing performance is unreliable; when the valve body is depressurized, the water pressure for flushing the intelligent toilet is often not large, affecting the user experience.

[0003] At the same time, the water pressure in the valve body cannot be automatically adjusted, and the inner wall of the valve body is easily subjected to a large pressure, so that the sealing performance of the valve body will deteriorate, affecting the reliability of the product. With the increase of the water efficiency standard for the whole intelligent toilet in the market, existing solenoid valves generally do not have a flow statistics function, and it is impossible to intuitively know the size of the water flow in the valve body, so the solenoid valve cannot be closed according to actual needs; the solenoid valve is easily damaged after long-term use, and it is difficult to meet the flushing water efficiency in various water pressure environments.

[0004] Therefore, it is necessary to design a flush valve to overcome the above difficulties, and in view of this, the present utility model is specifically proposed. Summary of the Utility Model

[0005] To solve the above technical problems, the basic concept of the technical solution adopted by the present utility model is:

[0006] A flushing valve, comprising a valve body, wherein an inlet channel and an outlet channel are provided on the valve body, an outlet cavity communicating with the outlet channel is further provided in the valve body, a sealing assembly is provided between the inlet channel and the outlet cavity, a back pressure cavity communicating with the inlet channel is formed by the sealing assembly and the inner wall of the valve body, a pressure relief channel is provided between the back pressure cavity and the outlet cavity, and an electromagnetic control assembly for controlling the opening or closing of the pressure relief channel is further provided on the valve body; the sealing assembly includes a sealing ring, a sealing ring holder and a mounting cover, and a guiding channel connecting the inlet channel and the back pressure cavity is provided on the mounting cover; the sealing ring is sleeved and installed on the sealing ring holder, and an anti-blocking spring is provided between the sealing ring holder and the mounting cover; the sealing ring is arranged at the inlet of the outlet cavity, and the sealing ring moves towards the mounting cover when the electromagnetic control assembly is energized; a sealing portion is provided at the edge of the sealing ring, and the sealing portion is arranged between the opening of the valve body and the mounting cover, a flow meter assembly for flow rate statistics is provided on the water inlet pipeline of the valve body, and the flow meter assembly includes a one-way valve body, a magnetic impeller and a Hall data receiver; the one-way valve body is arranged near the inlet of the water inlet pipeline, the magnetic impeller is arranged in the water inlet pipeline and can rotate relative to the valve seat body, and the Hall data receiver is arranged adjacent to the magnetic impeller; a vacuum breaker assembly is further provided on the valve body.

[0007] For the conduction of the flow channel, a threaded connection plugging position is further provided on the valve body, a sealing screw is arranged at the threaded connection plugging position, an O-ring for sealing is arranged on the sealing screw, and a vacuum cover that can be adjusted 360° is further provided on the valve body.

[0008] Preferably, the flow meter assembly further includes a one-way valve fixing ring, a one-way valve seat and a fixed impeller; the one-way valve fixing ring is arranged at the inlet of the water inlet pipeline, the one-way valve body is arranged in a fitting manner with the one-way valve fixing ring, a one-way valve seat that fits with it is provided on the end face of the one-way valve body facing away from the one-way valve fixing ring; a fixed impeller that fits with it is provided on the end face of the one-way valve seat facing away from the one-way valve body, a fixed seat is further provided in the water inlet pipeline, and the magnetic impeller is arranged between the fixed impeller and the fixed seat; a rotating shaft is provided on the magnetic impeller, one end of the rotating shaft is installed on the fixed impeller, and the other end is installed on the fixed seat.

[0009] Preferably, the vacuum breaker assembly is provided with a valve core, a valve core gasket, a spring, a snap ring, an O-ring and a vacuum cover. The valve core gasket is assembled with the groove on the valve core, the valve core is assembled at the internal control part of the valve body, the spring is assembled at the shaft of the valve core, the snap ring is clamped at the top groove of the valve core, the O-ring is assembled at the groove of the valve body, and the vacuum cover is buckled at the round buckle on the valve body. There are 18 Great Wall teeth on the upper end face of the water inlet pipe of the valve body, corresponding to 2 convex platforms of the vacuum cover. The rotation angle of each Great Wall tooth is 20°. In this way, when the vacuum cover is buckled on the valve body, it can be adjusted every 20°.

[0010] Preferably, a plugging thread structure is further provided on the side of the valve body. For the conduction function of the flow channel, a sealing screw and an O-ring are used for sealing treatment.

[0011] Preferably, the sealing ring is provided with paired mounting holes, the mounting bracket is provided with paired protruding parts, and the protruding parts are mounted in the mounting holes; a first channel is provided on one of the protruding parts, and the first channel communicates with the water inlet channel and the back pressure chamber; the anti-blocking spring includes a spiral part and an extension part, the extension part is mounted in the first channel, one end of the spiral part abuts against the mounting bracket, and the other end abuts against the mounting cover; an annular groove for mounting the sealing part is provided at the opening of the valve body, the sealing part is arranged in the annular groove, and the edge of the mounting cover is mutually attached to the surface of the sealing part; a fastener connecting the two is provided between the mounting cover and the valve body, and when the mounting cover and the valve body are mutually attached, the inner wall of the mounting cover presses against and contacts the sealing part.

[0012] The sealing ring is mounted on the sealing ring frame, the sealing ring is made of an elastic material, and the sealing part of the sealing ring is mounted in the annular groove; the mounting bracket is provided with a protruding part, and a first channel is provided on the protruding part; when the electromagnetic control component is in a power-off state, the rubber core abuts against the pressure relief channel, so that the pressure relief channel will be in a closed state; in this way, water will flow along the water inlet channel into the first channel, then along the first channel into the back pressure chamber, and then water will continuously enter the back pressure chamber; when the back pressure chamber is full of water, the water pressure is constant; at this time, the sealing ring will abut against the inlet of the water outlet chamber under the action of the water pressure in the back pressure chamber, so that water cannot enter the water outlet chamber, the valve body remains in a closed state, the sealing performance is good and water will not overflow.

[0013] When the inlet of the pressure relief channel is opened, water will flow along the pressure relief channel into the water outlet chamber; at this time, the water pressure in the back pressure chamber decreases, so that the sealing ring will deform towards the direction of the mounting cover, then the water outlet chamber will be in an open state, and water can directly enter the water outlet chamber along the water inlet channel.

[0014] Preferably, a first through hole is provided at the center of the sealing ring, a first protrusion is provided at the center of the sealing ring frame, and the first protrusion passes through the first through hole and is stuck on the end surface of the sealing ring facing the water outlet chamber; a second protrusion is provided at the end of each protruding part, and the second protrusion passes through the mounting hole and is stuck on the end surface of the sealing ring facing the water outlet chamber.

[0015] The sealing ring is made of an elastic material, and the first protrusion on the sealing ring frame cooperates with the first through hole, so as to prevent water from entering the back pressure chamber through the first through hole; similarly, the second protrusion cooperates with the mounting hole, so as to prevent water from entering the back pressure chamber through the mounting hole. By providing the first protrusion and the second protrusion, the connection between the sealing ring and the mounting bracket is more stable.

[0016] Preferably, the electromagnetic control assembly includes an upper iron plate, a lower iron plate, a coil assembly, a magnetic core, a moving iron core, a magnetic ring and a rubber core; the lower iron plate is arranged on the valve body and close to the pressure relief channel, the coil assembly is arranged above the lower iron plate and extends into the valve body, and the upper iron plate is arranged on the surface of the coil assembly and extends towards the lower iron plate; screws are arranged between the upper iron plate, the lower iron plate and the valve body, and the screws pass through the upper iron plate and the lower iron plate in sequence and are installed on the mounting cover; the magnetic core is installed at the opening of the coil assembly and is arranged in mutual fit with the upper iron plate; a moving iron core is further arranged in the coil assembly, the moving iron core is arranged adjacent to the magnetic core and a return spring is arranged between the two, and the return spring is sleeved on the moving iron core; a rubber core is arranged at the end of the moving iron core, when the coil assembly is energized, the rubber core moves away from the pressure relief channel, and when the coil assembly is de-energized, the rubber core abuts against the inlet of the pressure relief channel.

[0017] When the coil assembly is energized in the forward direction, the magnetic core becomes magnetic and attracts the moving iron core, the moving iron core drives the rubber core to approach the magnetic core, and when the rubber core leaves the pressure relief channel, water will enter the water outlet cavity along the pressure relief channel. At this time, the return spring is in a compressed state.

[0018] When the coil assembly is connected to a negative voltage, the iron core overcomes the magnetic force of the magnetic ring, so that the moving iron core moves under the action of the elastic force of the return spring, and the rubber core will abut against the inlet of the pressure relief channel again.

[0019] Preferably, a first O-ring is arranged between the magnetic core and the coil assembly, a card slot is arranged on the magnetic core, and the first O-ring is stuck in the card slot; a magnetic ring is arranged between the lower iron plate and the opening of the valve body, a second O-ring is arranged below the magnetic ring, and the second O-ring is in mutual fit with the inner wall of the valve body.

[0020] When the rubber core abuts against the inlet of the pressure relief channel, water will gather near the pressure relief channel; by arranging the second O-ring, water cannot overflow from the connection between the valve body and the lower iron plate; by arranging the first O-ring, water cannot overflow from the connection between the magnetic core and the upper iron plate, so that the valve body has good sealing performance.

[0021] The utility model has the following beneficial effects compared with the prior art:

[0022] The utility model is provided with a sealing component inside the valve body. The sealing component keeps the valve body at a constant pressure. When the electromagnetic control component is powered on, the valve body will automatically relieve pressure, so that there will be a large water pressure in the water outlet channel of the valve body and sufficient impact force. At the same time, the sealing ring on the sealing component makes the valve body have good sealing performance, avoiding water leakage. The sealing is safe and reliable. At the same time, a flow meter component capable of counting the flow is designed. An electromagnetic control component communicated with a Hall data receiver is also arranged inside the valve seat body, and the conduction or closing of the valve seat body is controlled according to the actual flow inside the valve body, with high reliability and convenient control.

[0023] The following further describes in detail the specific implementation manners of the utility model with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In the drawings:

[0025] Figure 1 is a front view sectional structure schematic diagram of the utility model;

[0026] Figure 2 is a side view sectional structure schematic diagram of the utility model;

[0027] Figure 3 is a partial sectional structure schematic diagram of the utility model;

[0028] Figure 4 is a schematic diagram of the overall structure of the utility model;

[0029] Figure 5 is a schematic diagram of the overall side view structure of the utility model.

[0030] In the figure: 1. Valve body; 2. Vacuum cover; 3. Great Wall tooth; 4. First O-ring; 5. Spring; 6. Spool gasket; 7. Mounting cover; 8. Hall receiver; 9. Impeller frame; 10. Magnetic impeller; 11. Fixed impeller; 12. Positioning ring; 13. Check valve body; 14. Upper iron plate; 15. Lower iron plate; 16. Magnetic conduction core; 17. Magnetic ring; 18. Second O-ring; 19. Back pressure chamber; 20. Sealing ring; 21. Water outlet chamber; 22. Pressure relief channel; 23. Anti-blocking spring; 24. Moving iron core; 25. Sealing ring holder; 26. Sealing screw; 27. O-ring seal; 28. Check valve seat; 29. Check valve fixing ring; 30. Spool. SPECIFIC IMPLEMENTATION MANNERS

[0031] To make the objectives, technical solutions and advantages of the embodiments of the utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments with reference to the accompanying drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model.

[0032] Such as Figures 1 to 3As shown in the figure, a flushing valve includes a valve body 1, an inlet channel and an outlet channel are provided on the valve body 1, an outlet cavity 21 communicating with the outlet channel is further provided inside the valve body 1, and a sealing assembly is provided between the inlet channel and the outlet cavity;

[0033] A back pressure cavity 19 communicating with the inlet channel is formed by surrounding the sealing assembly and the inner wall of the valve body 1, a pressure relief channel 22 is provided between the back pressure cavity 19 and the outlet cavity, and an electromagnetic control assembly for controlling the opening or closing of the pressure relief channel 22 is further provided on the valve body 1;

[0034] The sealing assembly includes a sealing ring 20, a sealing ring holder 25 and a mounting cover 7, and a guiding channel connecting the inlet channel and the back pressure cavity 19 is provided on the mounting cover 7; the sealing ring 20 is sleeved and installed on the sealing ring holder 25, and an anti-blocking spring 23 is provided between the sealing ring holder 25 and the mounting cover 7; the sealing ring 20 is arranged at the entrance of the outlet cavity 21;

[0035] When the electromagnetic control assembly is energized, the sealing ring 20 moves towards the mounting cover 7; a sealing portion is provided at the edge of the sealing ring 20, and the sealing portion is arranged between the opening of the valve body 1 and the mounting cover 7, and a flow meter assembly for flow rate statistics is provided on the inlet pipeline of the valve body 1;

[0036] The flow meter assembly includes a one-way valve body 13, a magnetic impeller 10 and a Hall receiver 8; the one-way valve body 13 is arranged near the entrance of the inlet pipeline, the magnetic impeller 10 is arranged in the inlet pipeline and can rotate relative to the valve body 1, and the Hall receiver 8 is arranged adjacent to the magnetic impeller 10; a vacuum breaker assembly is further provided on the valve body 1;

[0037] A threaded connection blocking position is further provided on the valve body 1, a sealing screw 26 is arranged at the threaded connection blocking position, an O-shaped sealing ring 27 is sealed on the sealing screw 26, and a vacuum cover 2 that can be adjusted 360° is further provided on the valve body 1.

[0038] As Figures 1 to 3 shown, in the specific implementation manner, the flow meter assembly further includes a one-way valve fixing ring 29, a one-way valve seat 28 and a fixed impeller 11; the one-way valve fixing ring 29 is arranged at the entrance of the inlet pipeline, the one-way valve body 13 is arranged in a fitting manner with the one-way valve fixing ring 29, and a one-way valve seat 28 that fits with it is provided on the end face of the one-way valve body 13 facing away from the one-way valve fixing ring 29.

[0039] As Figures 1 to 3 shown, further, a fixed impeller 11 that fits with it is provided on the end face of the one-way valve seat 28 facing away from the one-way valve body 13, a fixed seat is further provided in the inlet pipeline, and the magnetic impeller 10 is arranged between the fixed impeller 11 and the fixed seat; a rotating shaft is provided on the magnetic impeller 10, one end of the rotating shaft is installed on the fixed impeller 11, and the other end is installed on the fixed seat.

[0040] As Figures 1 to 3As shown in the figure, further, the vacuum breaker assembly is provided with a valve core 30, a valve core gasket 6, a spring 5, a sealing ring 20, and a vacuum cover 2. The valve core gasket 6 is assembled with the groove on the valve core 30. The valve core 30 is assembled at the internal control part of the valve body 1. The spring 5 is assembled at the shaft of the valve core 30. The snap ring is clamped at the top card slot of the valve core 30. The sealing ring 20 is assembled at the card slot of the valve body 1. The vacuum cover 2 is buckled at the round buckle on the valve body 1. There are 18 Great Wall teeth 3 on the upper end face of the water inlet pipe of the valve body 1, corresponding to the 2 bosses of the vacuum cover 2. The rotation angle of each Great Wall tooth 3 is 20°. When the vacuum cover 2 is buckled on the valve body 1, it is adjusted every 20°.

[0041] As Figures 1 to 3 shown in the figure, further, the side of the valve body 1 is also provided with a plugging thread structure. For the conduction function of the flow channel, a sealing screw 26 and a rubber sealing ring are used for sealing treatment.

[0042] As Figures 1 to 3 shown in the figure, further, the electromagnetic control assembly includes an upper iron plate 14, a lower iron plate 15, a coil assembly, a magnetic core 16, a moving iron core 24, a magnetic ring, and a rubber core. The lower iron plate 15 is arranged on the valve body 1 and close to the pressure relief channel 22. The coil assembly is arranged above the lower iron plate 15 and extends into the valve body 1. The upper iron plate 14 is arranged on the surface of the coil assembly and extends in the direction of the lower iron plate 15. Screws are provided between the upper iron plate 14, the lower iron plate 15 and the valve body 1. The screws pass through the upper iron plate 14 and the lower iron plate 15 in sequence and are installed on the mounting cover 7. The magnetic core 16 is installed at the opening of the coil assembly and is arranged in mutual contact with the upper iron plate 14. A moving iron core 24 is also arranged in the coil assembly. The moving iron core 24 is arranged adjacent to the magnetic core 16 and a return spring is arranged between the two. The return spring is sleeved on the moving iron core 24. A rubber core is arranged at the end of the moving iron core 24. When the coil assembly is energized, the rubber core is away from the pressure relief channel 22. When the coil assembly is de-energized, the rubber core abuts against the inlet of the pressure relief channel 22.

[0043] The implementation principle of a flushing valve in this embodiment is as follows:

[0044] A flow meter assembly is provided in the inlet pipeline to measure the magnitude of the water flow entering the valve seat body. The flow meter assembly includes a magnetic impeller and a Hall data receiver. The magnetic impeller has magnetism. During the rotation of the magnetic impeller, the Hall data receiver generates an electrical signal and feeds the electrical signal back to the control circuit, so that the rotation frequency of the magnetic impeller can be measured. Since the rotation speed of the magnetic impeller is proportional to the water flow speed, the water flow can be conveniently measured. At the same time, a sealing assembly is provided on the valve body. The sealing assembly includes a mounting cover and a sealing ring. The sealing cover and the inner wall of the valve body enclose a backpressure chamber. When the electromagnetic control assembly is in a power-off state, water will gather in the backpressure chamber, so that the water pressure in the valve body remains constant. At the same time, a sealing portion is provided on the sealing ring, so that the sealing performance between the mounting cover and the valve body is good, the water in the backpressure chamber cannot overflow, and the water pressure can remain constant. When the electromagnetic control assembly is in a powered-on state, the backpressure chamber is automatically depressurized, so that the water flow will directly enter the outlet channel from the inlet channel, and there will be a large impact force in the outlet channel. Therefore, the utility model has good and reliable sealing performance, can be applied to different water pressure environments, and has good versatility.

[0045] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0046] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

[0047] What is described in the above specification is only the specific implementation manner of the present invention. Various examples do not constitute a limitation to the essence of the present invention. Those of ordinary skill in the technical field can make modifications or deformations to the previously described specific implementation manners after reading the specification without departing from the essence and scope of the invention.

Claims

1. A flush valve, characterized in that: It comprises a valve body, on which a water inlet channel and a water outlet channel are arranged, and a water outlet cavity communicated with the water outlet channel is also arranged in the valve body, and a sealing component is arranged between the water inlet channel and the water outlet cavity; The sealing assembly and the inner wall of the valve body surround and form a back pressure chamber connected to the water inlet channel, a pressure relief channel is provided between the back pressure chamber and the water outlet chamber, and the valve body is also provided with an electromagnetic control assembly for controlling the opening or closing of the pressure relief channel; The sealing assembly comprises a sealing ring, a sealing ring frame and a mounting cover, wherein the mounting cover is provided with a guide channel connecting the water inlet channel and the back pressure chamber; the sealing ring is sleeved and mounted on the sealing ring frame, and an anti-blocking spring is provided between the sealing ring frame and the mounting cover; the sealing ring is arranged at the entrance of the water outlet chamber; When the electromagnetic control component is powered on, the sealing ring moves toward the installation cover; a sealing portion is provided at the edge of the sealing ring, and the sealing portion is arranged between the opening of the valve body and the installation cover; a flow meter component for flow statistics is provided on the water inlet pipeline of the valve body; The flow meter assembly includes a one-way valve body, a magnetic impeller and a Hall receiver; the one-way valve body is arranged near the inlet of the water inlet pipeline, the magnetic impeller is arranged in the water inlet pipeline and can rotate relative to the valve body, and the Hall receiver is arranged adjacent to the magnetic impeller; a vacuum breaker assembly is also arranged on the valve body; A threaded connection blocking position is also provided on the valve body, a sealing screw is also provided on the threaded connection blocking position, an O-ring is sealed on the sealing screw, and a vacuum cover which can be adjusted 360 degrees is also provided on the valve body.

2. A flush valve according to claim 1, characterized in that: The flow meter assembly also includes a one-way valve fixing ring, a one-way valve seat and a fixed impeller; the one-way valve fixing ring is arranged at the inlet of the water inlet pipe, the one-way valve body is arranged in close contact with the one-way valve fixing ring, and the end face of the one-way valve body facing away from the one-way valve fixing ring is provided with a one-way valve seat which is in close contact with the one-way valve fixing ring.

3. A flush valve according to claim 2, characterized in that: The end surface of the one-way valve seat facing away from the one-way valve body is provided with a fixed impeller that fits therewith, and a fixed seat is also provided in the water inlet pipe, and the magnetic impeller is arranged between the fixed impeller and the fixed seat; a rotating shaft is provided on the magnetic impeller, one end of the rotating shaft is installed on the fixed impeller, and the other end is installed on the fixed seat.

4. A flush valve according to claim 3, characterized in that: The vacuum breaker assembly is provided with a valve core, a valve core pad, a spring, a sealing ring, and a vacuum cover. The valve core pad is assembled with the groove on the valve core, the valve core is assembled with the internal control part of the valve body, the spring is assembled with the axis of the valve core, the retaining ring is clamped in the clamping groove at the top of the valve core, the sealing ring is assembled with the clamping groove of the valve body, the vacuum cover is buckled at the round buckle on the valve body, the upper end face of the water inlet pipe of the valve body has 18 Great Wall teeth, which correspond to the two bosses of the vacuum cover, the rotation angle of each Great Wall tooth is 20°, and the vacuum cover is adjusted at intervals of 20° when buckled on the valve body.

5. A flush valve according to claim 4, characterized in that: The side of the valve body is also provided with a plugging thread structure, and a sealing screw and a rubber sealing ring are used for sealing to ensure the conduction function of the flow channel.

6. A flush valve according to claim 5, characterized in that: The electromagnetic control assembly comprises an upper iron plate, a lower iron plate, a coil assembly, a magnetic core, a moving iron core, a magnetic ring and a rubber core; the lower iron plate is arranged on the valve body and close to the pressure relief channel.

7. A flush valve according to claim 6, characterized in that: The coil assembly is arranged above the lower iron plate and extends into the valve body, and the upper iron plate is arranged on the surface of the coil assembly and extends in the direction of the lower iron plate; screws are arranged between the upper iron plate, the lower iron plate and the valve body, and the screws pass through the upper iron plate and the lower iron plate in turn and are installed on the installation cover; the magnetic core is installed at the opening of the coil assembly and is arranged to fit the upper iron plate.

8. A flush valve according to claim 7, characterized in that: A moving iron core is also provided in the coil assembly. The moving iron core is adjacent to the magnetic core and a reset spring is provided between the two. The reset spring is sleeved and installed on the moving iron core. A rubber core is provided at the end of the moving iron core. When the coil assembly is powered on, the rubber core is away from the pressure relief channel. When the coil assembly is powered off, the rubber core is against the entrance of the pressure relief channel.

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