Flushing valve and toilet

Abstract

The application discloses a flushing valve and a closestool, and relates to the technical field of sanitary wares. The flushing valve comprises a valve body and an anti-siphon structure. The valve body is internally formed with a cavity. The valve body is further provided with a water inlet end and a water outlet end which are respectively connected with the cavity. The end surface of the water outlet end is formed with a gas permeation gap. The outer wall surface of the water outlet end is further formed with an air inlet channel which is connected with the gas permeation gap. The anti-siphon structure comprises a connecting head and a sealing element. The connecting head is sleeved on the outer wall surface of the water outlet end. The sealing element is fixed on the inner wall of the connecting head. The sealing element has a first state in which the sealing element is abutted with the outer wall surface of the water outlet end to seal the air inlet channel. Alternatively, the sealing element has a second state in which the sealing element is separated from the outer wall surface of the water outlet end to open the air inlet channel. In the second state, external air can enter the valve body through the air inlet channel and the gas permeation gap. The technical scheme of the application aims to simplify the anti-siphon structure of the flushing valve and improve the stability of the flushing valve.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sanitary wares, in particular to a flushing valve and a closestool applying the same. BACKGROUND

[0002] The flushing valve is widely used on closestools to control the flushing of the closestools. In order to prevent sewage backflow, an anti-siphon structure is usually added inside the flushing valve. For example, a check valve is added inside the pipeline of the water outlet of the flushing valve in the prior art. Since the check valve occupies the internal volume of the pipeline of the water outlet, it will cause the water flow to decrease and affect the use effect of the product. For another example, an anti-siphon structure is arranged inside the flushing valve in the prior art. However, the arrangement of the anti-siphon structure inside the flushing valve greatly increases the structural complexity of the flushing valve. Moreover, the anti-siphon structures in the above two schemes are subjected to long-term impact of water flow, which is easy to cause damage to the anti-siphon structure and lose the check function, thereby affecting the stability and service life of the flushing valve. SUMMARY

[0003] The main purpose of the present application is to provide a flushing valve, which aims to simplify the anti-siphon structure of the flushing valve and improve the stability of the flushing valve.

[0004] To achieve the above-mentioned purpose, the flushing valve provided by the present application comprises:

[0005] A valve body, wherein a cavity is formed inside the valve body, the valve body further has a water inlet end and a water outlet end which are connected in communication and have a cavity in common, an end face of the water outlet end is formed with a gas permeation gap, and an air inlet channel which communicates with the gas permeation gap is further formed on the outer wall surface of the water outlet end;

[0006] An anti-siphon structure, comprising a connecting head and a sealing element, wherein the connecting head is sleeved on the outer wall surface of the water outlet end, and the sealing element is fixed on the inner wall of the connecting head;

[0007] The sealing element has a first state of abutting against the outer wall surface of the water outlet end to seal the air inlet channel, or the sealing element has a second state of separating from the outer wall surface of the water outlet end to open the air inlet channel, and in the second state, external air can enter the valve body through the air inlet channel and the gas permeation gap.

[0008] In an embodiment of the present application, the connecting head comprises a connecting portion, a fastening portion and a mounting portion which are connected in sequence, and a limiting step is formed between the fastening portion and the connecting portion;

[0009] The fastening portion is sleeved on the outer wall surface of the water outlet end, and the end face of the water outlet end abuts against the surface of the limiting step;

[0010] The inner diameter of the mounting portion is greater than the outer diameter of the water outlet end, and the sealing member is fixed inside the mounting portion.

[0011] In an embodiment of the present application, the inner wall surface of the mounting portion is concavely provided with a receiving groove, and the sealing member is received and fixed in the receiving groove.

[0012] In an embodiment of the present application, the inner wall surface of the fastening portion is provided with a first thread, the outer wall surface of the water outlet end is provided with a second thread, and the first thread is engaged with the second thread.

[0013] The outer wall surface or the inner wall surface of the connecting portion is provided with a third thread.

[0014] In an embodiment of the present application, the sealing member is located at one end of the first thread away from the air permeable gap, and one end of the air inlet channel away from the air permeable gap extends below the sealing member.

[0015] In an embodiment of the present application, the number of air permeable gaps is multiple, and the multiple air permeable gaps are distributed at intervals along the end surface of the water outlet end.

[0016] The number of air inlet channels is multiple, and the multiple air inlet channels are distributed at intervals along the peripheral wall of the water outlet end, and one air inlet channel is communicated with one air permeable gap.

[0017] In an embodiment of the present application, the sealing member comprises:

[0018] A body portion, which is annular in structure and is fixed with the connecting head;

[0019] A sealing portion, which is connected with the body portion and extends towards one side of the inner ring of the body portion, and the sealing portion can be deformed towards one side of the air permeable gap.

[0020] In the first state, the sealing portion abuts against the outer wall surface of the water outlet end, and in the second state, the sealing portion is separated from the outer wall surface of the water outlet end.

[0021] In an embodiment of the present application, the sealing portion is connected to one end of the body portion away from the air permeable gap.

[0022] And / or, the outer side wall of the body portion is formed with a positioning structure.

[0023] In an embodiment of the present application, the cavity comprises a first cavity and a second cavity connected in communication, the first cavity is communicated with the water inlet of the water inlet end, and the second cavity is communicated with the water outlet of the water outlet end.

[0024] The valve body further comprises a valve core assembly movably arranged in the second cavity to cut off or connect a water path between the first cavity and the water outlet.

[0025] The application further provides a toilet comprising the flush valve.

[0026] The flush valve comprises a valve body and an anti-siphon structure. An end face of a water outlet end of the valve body is formed with a gas permeation gap. An outer wall face of the water outlet end is further formed with an air inlet channel communicating with the gas permeation gap. The anti-siphon structure is arranged outside the water outlet end of the valve body. The anti-siphon structure comprises a connecting head and a sealing member. The connecting head is sleeved on the outer wall face of the water outlet end. The sealing member is fixed on an inner wall of the connecting head. When the pressure at the water inlet end is greater than the pressure at the water outlet end, the sealing member is in a first state. In the first state, the sealing member abuts against the outer wall face of the water outlet end to seal the air inlet channel. The sealing member can also prevent water from overflowing from the valve body through the gas permeation gap and the air inlet channel during water outlet. When the flush valve generates a reverse pressure at the water inlet end, i.e., siphoning occurs, water in the valve body flows back along the pipeline and forms a vacuum environment in the valve body, i.e., the pressure inside the valve body is less than the external air pressure. When the pressure difference between the external air pressure and the pressure inside the valve body reaches a certain value, the atmospheric pressure extrudes the sealing member and forces the sealing member to deform, so that the sealing member separates from the outer wall face of the water outlet end and forms a gap, thereby opening the air inlet channel. In a second state of the sealing member, external air can flow into the valve body through the air inlet channel and the gas permeation gap, thereby destroying the vacuum environment in the valve body and preventing sewage in the drain pipe from entering the valve body due to siphoning, thereby ensuring the hygiene of the water. In the present application, the anti-siphon structure is arranged outside the valve body. The structure of the valve body is not complicated. The water flow in the valve body does not directly impact the anti-siphon structure, which avoids damage to the anti-siphon structure caused by water flow impact, improves the stability of the flush valve, and prolongs the service life of the flush valve. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application. Those skilled in the art can also obtain other drawings from the structures shown in the drawings without creating any inventive labor.

[0028] Figure 1 FIG. 1 is a structural schematic diagram of an embodiment of the flush valve of the present application;

[0029] Figure 2 FIG. 2 is an exploded view of the structure of an embodiment of the flush valve in FIG. 1; Figure 1 ​

[0030] Figure 3 Fig. 1 is a schematic view of a flushing valve according to the present application in a closed state, wherein the arrow direction is the water flow direction; Figure 1 Fig. 2 is a schematic view of a flushing valve according to the present application in an open state, wherein the arrow direction is the water flow direction;

[0031] Figure 4 Fig. 3 is a schematic view of a flushing valve according to the present application in a state of siphon occurrence at the water inlet end, wherein the arrow direction is the water flow direction;

[0032] Figure 5 Fig. 4 is a schematic view of a flushing valve according to the present application in a state of siphon prevention at the water inlet end, wherein the arrow direction is the water flow direction;

[0033] Figure 6 Fig. 5 is a schematic view of a flushing valve according to the present application in a state of siphon prevention at the water inlet end, wherein the arrow direction is the water flow direction;

[0034] Figure 7 Fig. 6 is a schematic view of a flushing valve according to the present application in a state of siphon prevention at the water inlet end, wherein the arrow direction is the water flow direction;

[0035] Figure 8 Fig. 7 is a schematic view of a flushing valve according to the present application in a state of siphon prevention at the water inlet end, wherein the arrow direction is the water flow direction.

[0036] Brief Description of the Drawings:

[0037]

[0038] The object, features and advantages of the present application will be further understood based on the embodiments described below, with reference to the drawings. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0040] It should be noted that all the directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications also change accordingly.

[0041] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through intermediate medium, can be internal connection of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] In addition, in the present application, the description such as "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B schemes are satisfied at the same time. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0043] The present application provides a flush valve 100. Wherein, Figure 1 The structure diagram of an embodiment of the flush valve of the present application; Figure 2 The structure diagram of an embodiment of the flush valve of the present application; Figure 1 The structure diagram of an embodiment of the flush valve of the present application; Figure 3 The structure diagram of an embodiment of the flush valve of the present application; Figure 1 The structure diagram of an embodiment of the flush valve of the present application; Figure 4 The schematic diagram of the flush valve of the present application in the closed state; Figure 5 The schematic diagram of the flush valve of the present application in the open state; Figure 6 The schematic diagram of the flush valve of the present application in the water inlet end appears siphon; Figure 7 The schematic diagram of the anti-siphon structure in the flush valve of the present application in the first state; Figure 8 The schematic diagram of the anti-siphon structure in the flush valve of the present application in the second state.

[0044] Referring to Figures 1 to 6In the embodiment of the present application, the flush valve 100 comprises a valve body 10 and an anti-siphon structure 30. The valve body 10 has a water inlet end 11 and a water outlet end 13 connected to each other, and the end face of the water outlet end 13 is formed with a gas permeation gap 133, and the outer wall surface of the water outlet end 13 is further formed with an air inlet channel 135 connected to the gas permeation gap 133; the anti-siphon structure 30 comprises a connecting head 31 and a sealing member 33, the connecting head 31 is sleeved on the outer wall surface of the water outlet end 13, and the sealing member 33 is fixed on the inner wall of the connecting head 31; the sealing member 33 has a first state of abutting against the outer wall surface of the water outlet end 13 to seal the air inlet channel 135, or the sealing member 33 has a second state of separating from the outer wall surface of the water outlet end 13 to open the air inlet channel 135, and in the second state, external air can enter the valve body 10 through the air inlet channel 135 and the gas permeation gap 133.

[0045] In the technical scheme of the embodiment, the flush valve 100 comprises the valve body 10 and the anti-siphon structure 30, wherein the water inlet end 11 of the valve body 10 is provided with a water inlet 111, and the water outlet end 13 is provided with a water outlet 131, the water inlet 111 of the valve body 10 is connected to a water inlet pipe, and the water outlet 131 is connected to a water outlet pipe. The end face of the water outlet end 13 of the valve body 10 is formed with a gas permeation gap 133, and the outer wall surface of the water outlet end 13 is further formed with an air inlet channel 135 connected to the gas permeation gap 133; the anti-siphon structure 30 is arranged outside the water outlet end 13 of the valve body 10; specifically, the anti-siphon structure 30 comprises a connecting head 31 and a sealing member 33, the connecting head 31 is sleeved and fixed on the outer wall surface of the water outlet end 13, and the sealing member 33 is fixed on the inner wall of the connecting head 31.

[0046] When the pressure of the water inlet end 11 is greater than the pressure of the water outlet end 13, at this time, the sealing member 33 is in the first state, in the first state, the sealing member 33 abuts against the outer wall surface of the water outlet end 13 to seal the air inlet channel 135, and at the same time, it can also prevent the risk that water flows out of the valve body 10 through the gas permeation gap 133 and the air inlet channel 135 during the water outlet process of the flush valve 100.

[0047] When the reverse pressure is generated at the water inlet end 11 of the flush valve 100, i.e. siphon is generated, the water in the valve body 10 will flow back along the pipeline and a vacuum environment is formed in the valve body 10, i.e. the pressure inside the valve body 10 is less than the external air pressure. When the pressure difference between the external air pressure and the pressure inside the valve body 10 reaches a certain value, the atmospheric pressure will extrude the sealing member 33 and force the sealing member 33 to deform, so that the sealing member 33 is separated from the outer wall surface of the water outlet end 13 and a gap is formed, thereby opening the air inlet channel 135, i.e. the second state of the sealing member 33. In the second state, the external air can flow into the valve body 10 through the air inlet channel 135 and the air permeable gap 133, thereby destroying the vacuum environment in the valve body 10 and preventing the sewage in the drain pipe from entering the valve body 10 due to siphon, so as to ensure the sanitation of the water.

[0048] Since the anti-siphon structure 30 is arranged outside the valve body 10 in the scheme of the present application, the complexity of the structure of the valve body 10 will not be increased, and at the same time, the water flow in the valve body 10 will not directly impact the anti-siphon structure 30, avoiding damage to the anti-siphon structure 30 caused by water flow impact, improving the stability of the flush valve 100, and prolonging the service life of the flush valve 100.

[0049] Referring to Figures 3 to 6 In an embodiment of the present application, a first cavity 14 and a second cavity 15 are further formed in the valve body 10 and are in communication with each other. The first cavity 14 communicates with the water inlet 111 of the water inlet end 11, and the second cavity 15 communicates with the water outlet 131 of the water outlet end 13. The valve body 10 further comprises a valve core assembly 16 movably arranged in the second cavity 15, which is used to cut off or communicate the water path between the first cavity 14 and the water outlet 131.

[0050] In the embodiment, the first cavity 14 and the second cavity 15 are both used to store water, and the valve body 10 is further provided with a mounting opening 19 communicating with the second cavity 15, and the valve core assembly 16 is mounted in the second cavity 15 through the mounting opening 19 of the valve body 10. It can be understood that the water outlet end 13 is arranged in line with the central axis of the mounting opening 19, for example, the mounting opening 19 is located at the top of the second cavity 15, and the water outlet end 13 communicates with the bottom of the second cavity 15; or the mounting opening 19 is located at the bottom of the second cavity 15, and the water outlet end 13 communicates with the top of the second cavity 15; in this way, the valve core assembly 16 moves up and down in the second cavity 15.

[0051] In an embodiment, the first cavity 14 and the second cavity 15 are arranged side by side, and the water inlet end 11 and the water outlet end 13 are both located at the bottom of the valve body 10. In this way, the water inlet pipe and the drain pipe can be located at the same side of the valve body 10, which facilitates the installation of the flush valve 100, reduces the installation difficulty, reduces the installation space, and also facilitates the pipe arrangement of the water inlet pipe and the drain pipe, improving the convenience of installation.

[0052] Specifically, refer to Figures 3 to 6 In one embodiment of the present application, the valve core assembly 16 comprises an electromagnetic valve 161 and a piston 163, at the moment when the electromagnetic valve 161 is de-energized, the water in the second cavity 15 flows to the water outlet 131 through the water channel inside the valve core assembly 16, at this time, the pressure in the second cavity 15 is less than that in the first cavity 14, under the water pressure of the first cavity 14, the piston 163 is pushed upward to open the water channel between the first cavity 14 and the water outlet, so that the flush valve 100 can normally drain water. When siphon occurs at the water inlet end 11, the water in the valve body 10 will flow back along the pipeline, at this time, the air pressure at the water outlet end 13 pushes the piston 163 and moves the piston 163 upward to make the water channel between the water outlet end 13 and the first cavity 14 communicate, at this time, if the vacuum environment formed in the valve body 10 is not destroyed, the sewage at the water outlet end 13 will flow back to the water inlet end 11, causing the problem of water pollution. Therefore, by providing an anti-siphon structure 30 outside the water outlet end 13, when the pressure difference between the external air pressure and the pressure in the valve body 10 reaches a certain value, the atmospheric pressure extrudes the sealing element 33 and forces the sealing element 33 to deform, so that the sealing element 33 separates from the outer wall surface of the water outlet end 13 and forms a gap to open the air inlet channel 135, at this time, the external air flows into the valve body 10 through the air inlet channel 135 and the air permeable gap 133, thereby destroying the vacuum environment in the valve body 10, so that the pressure between the water inlet end 11 and the water outlet end 13 reaches equilibrium, preventing the sewage at the water outlet end 13 from flowing back to the water inlet end 11, and ensuring the hygiene of the water.

[0053] It can be understood that the opening and closing of the electromagnetic valve 161 is realized by a controller, and the closestool is also provided with a sensor, the sensor is connected with the controller through a signal, and the sensor is used for sensing whether a user is using the closestool, after sensing that the user has finished using, the sensor sends a signal to the controller, and the controller controls the electromagnetic valve 161 to open.

[0054] Please refer to Figure 2 In one embodiment of the present application, the number of air permeable gaps 133 is multiple, and the multiple air permeable gaps 133 are distributed along the end surface of the water outlet end 13; the number of air inlet channels 135 is multiple, and the multiple air inlet channels 135 are distributed along the outer peripheral wall of the water outlet end 13, and one air inlet channel 135 communicates with one air permeable gap 133.

[0055] In the technical scheme of the embodiment, the plurality of air inlets 133 and air inlets 135 are arranged, when one of the air inlets 135 or the air inlets 133 is blocked, the air outside can still enter the valve body 10 from the other air inlets 135 and the air inlets 133, thereby destroying the vacuum environment in the valve body 10, so that the pressure between the water inlet end 11 and the water outlet end 13 is balanced, preventing the sewage in the water outlet end 13 from flowing back to the water inlet end 11, and ensuring the hygiene of the water. Specifically, the number of air inlets 133 can be two, three or four, and when the number of air inlets 133 is multiple, the plurality of air inlets 133 are evenly distributed along the end surface of the water outlet end 13, which is also beneficial to uniform air inlet from the circumferential direction of the water outlet end 13, and improves the uniformity of the internal environment of the valve body 10.

[0056] Please refer to Figure 7 and Figure 8 In an embodiment of the present application, the connecting head 31 comprises a connecting portion 311, a fastening portion 313 and a mounting portion 315 connected in sequence, a limiting step 317 is formed between the fastening portion 313 and the connecting portion 311; the fastening portion 313 is sleeved on the outer wall surface of the water outlet end 13, the end surface of the water outlet end 13 abuts against the surface of the limiting step 317; the inner diameter of the mounting portion 315 is larger than the outer diameter of the water outlet end 13, and the sealing element 33 is fixed in the interior of the mounting portion 315.

[0057] In the embodiment, the connecting head 31 has a structure of a cylinder with both ends open, which is simple in structure and can reduce the difficulty of design and processing. The material of the connecting head 31 is metal, such as stainless steel, copper, copper alloy, etc., so as to improve the strength of the connecting head 31 and prolong the service life of the connecting head 31. Of course, the material of the connecting head 31 is not limited to metal, but can also be plastic, such as ABS, PC, etc., so as to reduce the weight of the connecting head 31 and improve the anti-rust performance of the connecting head 31.

[0058] The connecting head 31 is sleeved and fixed on the surface of the water outlet end 13, so as to simplify the connection mode between the connecting head 31 and the water outlet end 13. Specifically, the fastening portion 313 of the connecting head 31 is fixedly connected with the water outlet end 13 of the valve body 10. Understandably, the inner diameter of the fastening portion 313 is in interference fit with the minimum outer diameter of the outer wall surface of the water outlet end 13, so as to ensure that the connecting head 31 and the valve body 10 will not leak or loosen after being connected. Further, the inner wall surface of the fastening portion 313 is provided with a first thread 3131, the outer wall surface of the water outlet end 13 is provided with a second thread 137, and the first thread 3131 is engaged with the second thread 137, so as to improve the reliability of the connection between the threaded connecting head 31 and the valve body 10, and avoid accidental loosening of the connecting head 31 and the valve body 10 during use.

[0059] The connecting portion 311 is used for connecting with the drain pipe. In order to improve the reliability of the connection between the connecting portion 311 and the drain pipe, the connecting portion 311 and the drain pipe are also connected by screwing. Therefore, a third thread 3111 is arranged on the connecting portion 311. When the drain pipe is connected with the inner wall surface of the connecting portion 311, the third thread 3111 is arranged on the inner wall surface of the connecting portion 311. When the drain pipe is connected with the outer wall surface of the connecting portion 311, the third thread 3111 is arranged on the outer wall surface of the connecting portion 311. A limiting step 317 is arranged between the connecting portion 311 and the fastening portion 313. The limiting step 317 is also arranged in a ring shape. The minimum inner diameter of the limiting step 317 is smaller than the minimum inner diameter of the water outlet end 13. When the connecting head 31 is connected with the valve body 10, the end surface of the water outlet end 13 can abut against the surface of the limiting step 317 to limit the transition connection between the connecting head 31 and the valve body 10.

[0060] The inner diameter of the mounting portion 315 is greater than the outer diameter of the water outlet end 13. In this way, a space for accommodating the sealing member 33 is provided. Specifically, the sealing member 33 is fixed on the inner wall surface of the mounting portion 315. In an embodiment, the inner wall surface of the mounting portion 315 is concavely provided with an accommodation groove 3151. The sealing member 33 is accommodated in the accommodation groove 3151. The accommodation groove can limit the movement of the sealing member 33 in the axial direction of the connecting head 31, so as to ensure that the sealing member 33 can abut against the outer wall surface of the water outlet end 13 to achieve the sealing effect of the sealing member 33.

[0061] In an embodiment of the present application, the sealing member 33 comprises a main body portion 331 and a sealing portion 333. The main body portion 331 is in a ring shape and is fixed with the connecting head 31. The sealing portion 333 is connected with the main body portion 331 and extends towards the inner ring side of the main body portion 331. The cross section of the sealing member 33 is in a Y shape. The sealing portion 333 can deform towards the side of the air permeable gap 133. In the first state, the sealing portion 333 abuts against the outer wall surface of the water outlet end 13. In the second state, the sealing portion 333 is separated from the outer wall surface of the water outlet end 13. The material of the sealing member 33 can be silica gel, rubber or the like. The main body portion 331 is in a ring shape. The outer ring of the main body portion 331 is fixed in the accommodation groove. The sealing portion 333 is connected on the inner ring side of the main body portion 331. The inner diameter of the sealing portion 333 is smaller than the outer diameter of the water outlet end 13. Therefore, the sealing portion 333 can abut against the outer wall surface of the water outlet end 13 to seal the air inlet channel 135.

[0062] It can be understood that, in the normal state, i.e., when the pressure of the water inlet end 11 is greater than the pressure of the water outlet end 13 or when the pressure of the water inlet end 11 is equal to the pressure of the water outlet end 13, the sealing portion 333 is in the first state of abutting against the outer wall surface of the water outlet end 13, as shown in FIG. 6. Figure 7 It can be understood that, in the normal state, i.e., when the pressure of the water inlet end 11 is greater than the pressure of the water outlet end 13 or when the pressure of the water inlet end 11 is equal to the pressure of the water outlet end 13, the sealing portion 333 is in the first state of abutting against the outer wall surface of the water outlet end 13, as shown in FIG. 6.

[0063] When the vacuum environment is formed in the valve body 10, the sealing part 333 will be deformed relative to the main part 331, and change from the first state to the second state, as shown in the state in the middle of the figure, so that the air inlet channel 135 is in communication with the ambient air, and the vacuum environment in the valve body 10 is destroyed. Figure 8

[0064] It can be understood that the sealing part 333 can be connected to the main part 331, for example, the sealing part 333 can be connected to the middle of the main part 331, or the sealing part 333 can be connected to the top end of the main part 331, as long as the sealing part 333 can abut against the outer wall surface of the water outlet end 13 to seal the air inlet channel 135 in the first state, and can be separated from the outer wall surface of the water outlet end 13 to open the air inlet channel 135 in the second state, which is not limited herein.

[0065] Please continue to refer to Figure 7 and Figure 8 In an embodiment of the present application, the sealing part 333 is connected to the end of the main part 331 away from the air permeable gap 133. In the technical solution of an embodiment of the present application, by arranging the sealing part 333 at the end of the main part 331 away from the air permeable gap 133, i.e. the sealing part 333 is connected to the top end of the main part 331, when the vacuum environment is formed in the valve body 10, and the external atmospheric pressure presses the sealing part 333, the sealing part 333 is deformed downward from the top end of the main part 331, so that the sealing part 333 can be deformed more easily, so as to facilitate the sealing part 33 to change from the first state to the second state. Further, the sealing part 333 is connected to the end of the main part 331 away from the air permeable gap 133, which can also minimize the space required for the deformation of the sealing part 333, so that the size of the connecting head 31 can be minimized.

[0066] In an embodiment of the present application, the outer side wall of the main part 331 is formed with a positioning structure (not shown in the figure) to improve the connection reliability between the main part 331 and the mounting part 315, and prevent the sealing part 33 from being in a position when assembled with the valve body 10, thereby affecting the sealing effect of the sealing part 33. Specifically, the positioning structure can be an anti-slip protruding rib or an anti-slip protruding point formed on the outer side wall of the main part 331, and the positioning structure is in interference fit with the groove wall surface of the accommodating groove.

[0067] ​When the positioning structure is the anti-skid convex rib, the number of the anti-skid convex ribs can be set to be multiple, each anti-skid convex rib is arranged on the outer side wall of the main body part 331, and the multiple anti-skid convex ribs are arranged along the axial direction of the main body part 331. When the positioning structure is the anti-skid convex point, the number of the anti-skid convex points is multiple, and the multiple anti-skid convex points are distributed on the outer peripheral wall of the main body part 331. Of course, in an embodiment, the positioning structure can also be a combination of the anti-skid convex rib and the anti-skid convex point.

[0068] Please continue to refer to Figure 7 and Figure 8 In an embodiment of the present application, the sealing member 33 is located at one end of the first thread 3131 away from the air permeable gap 133, and the air inlet channel 135 extends to below the sealing member 33 at an end away from the air permeable gap 133.

[0069] In the technical solution of the embodiment, the air inlet channel 135 is a groove structure formed by concave setting on the outer side of the air outlet end, and the air inlet channel 135 can be processed in a material-removing manner after the first thread 3131 is processed, so as to avoid the groove structure of the air inlet channel 135 affecting the processing of the first thread 3131. Both ends of the air inlet channel 135 penetrate both ends of the first thread 3131 in the length direction, and the end of the air inlet channel 135 away from the air permeable gap 133 extends to below the sealing member 33, that is, the position of the sealing member 33 is at the top of the air inlet channel 135, so that the sealing part 333 of the sealing member 33 can abut against the smooth position of the outer wall surface of the air outlet end 13, so as to improve the sealing reliability of the sealing part 333.

[0070] The present application also provides a toilet, which comprises the flush valve 100, and the specific structure of the flush valve 100 refers to the above-mentioned embodiments. Since the toilet adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0071] The above-mentioned is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation made by referring to the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A flush valve characterized by, The utility model relates to a flushing valve for a toilet, comprising: a valve body having a cavity formed therein, the valve body further having a water inlet end and a water outlet end respectively communicating with the cavity, an end face of the water outlet end being formed with a gas permeation gap, and an outer wall face of the water outlet end being further formed with an air inlet channel communicating with the gas permeation gap; an anti-siphon structure including a connecting head and a sealing member, the connecting head including a connecting portion, a fastening portion and a mounting portion connected in sequence, a limiting step being formed between the fastening portion and the connecting portion, the fastening portion being sleeved on the outer wall face of the water outlet end, the end face of the water outlet end abutting against the surface of the limiting step, and the inner diameter of the mounting portion being larger than the outer diameter of the water outlet end, the sealing member being fixed in the interior of the mounting portion; the sealing member including a main body portion and a sealing portion, the main body portion being annular in structure and fixed with the connecting head, the sealing portion being connected with the main body portion and extending towards the inner side of the annular main body portion, the sealing portion being deformable towards the side of the gas permeation gap, the sealing member having a first state of abutting against the outer wall face of the water outlet end to seal the air inlet channel or a second state of separating from the outer wall face of the water outlet end to open the air inlet channel, in the first state, the sealing portion abutting against the outer wall face of the water outlet end, and in the second state, the sealing portion separating from the outer wall face of the water outlet end, so that external air can enter the valve body through the air inlet channel and the gas permeation gap.

2. The flush valve of claim 1 wherein, an accommodating groove being recessed in the inner wall face of the mounting portion, and the sealing member being accommodated and fixed in the accommodating groove; 3. The flush valve of claim 1 wherein, a first thread being provided on the inner wall face of the fastening portion, and a second thread being provided on the outer wall face of the water outlet end, the first thread engaging with the second thread; a third thread being provided on the outer wall face or the inner wall face of the connecting portion.

4. The flush valve of claim 3 wherein, the sealing member being located at the end of the first thread away from the gas permeation gap, and the end of the air inlet channel away from the gas permeation gap extending to below the sealing member.

5. The flush valve of claim 4 wherein, a plurality of the gas permeation gaps being spaced apart along the end face of the water outlet end; a plurality of the air inlet channels being spaced apart along the peripheral wall of the water outlet end, and one air inlet channel communicating with one gas permeation gap.

6. The flush valve of claim 1 wherein, the sealing portion being connected to the end of the main body portion away from the gas permeation gap; and / or, a positioning structure being formed on the outer side wall of the main body portion.

7. A flush valve according to any one of claims 1 to 6, wherein the cavity including a first cavity and a second cavity connected in communication, the first cavity communicating with a water inlet of the water inlet end, and the second cavity communicating with a water outlet of the water outlet end; the valve body further including a valve core assembly movably arranged in the second cavity to cut off or communicate a water path between the first cavity and the water outlet.

8. A toilet characterized by the toilet including the flushing valve according to any one of claims 1 to 7.

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