A self-cleaning drain valve and a toilet having the same

Abstract

The application discloses a self-cleaning drain valve and a closestool with the same, and the self-cleaning drain valve comprises a valve body, a base and a cleaning piece, the valve body is movably provided with a valve core; the base is provided with a drain port and is fixedly connected with the valve body, the top end of the drain port forms a water stop section, the valve core is in sealing cooperation with the water stop section to close the drain port or is in separated cooperation to open the drain port; and the cleaning piece is movably arranged on the outer periphery of the water stop section to clean the outer periphery of the water stop section. The self-cleaning drain valve provided by the application can clean the outer periphery of the water stop section by using the cleaning piece during water drainage, so that the poor water stopping effect and leakage of the drain valve can be avoided, the use is more reliable, and meanwhile, the waste of water resources can be avoided.

Description

Technical Field

[0001] The present invention relates to the field of sanitary cleaning, and in particular to a self-cleaning drain valve and a toilet having the same. Background Art

[0002] A drain valve, used to drain water from a water tank into a toilet bowl for flushing, consists of a drain port and a valve core. The drain port's top end forms a water-stop section, with which the valve core opens and closes. Because the water-stop section typically protrudes upward, dirt easily accumulates around it after prolonged use. This dirt is then carried to the water-stop section, resulting in poor water-stopping performance and leakage. Summary of the Invention

[0003] The purpose of the present invention is to provide a drain valve with a self-cleaning function, which can automatically clean the peripheral area of ​​the water-stop section, effectively avoiding the problem of excessive dirt on the periphery of the water-stop section of the drain valve, which may easily lead to poor water-stopping effect and leakage.

[0004] To achieve the purpose of the present invention, the technical solution adopted by the present invention is:

[0005] A self-cleaning drain valve, comprising:

[0006] The valve body is provided with a valve core;

[0007] The base is provided with a drain port and is fixedly connected to the valve body. The top of the drain port forms a water stop section. The valve core and the water stop section are sealed to close the drain port or separated to open the drain port.

[0008] A cleaning member is movably arranged on the outer periphery of the water stop section to clean the outer periphery of the water stop section.

[0009] Optionally, the cleaning member is rotatably or slidably reciprocatingly disposed on the outer periphery of the water-stopping section.

[0010] Optionally, a mounting surface is provided on the outer periphery of the drain outlet, and when the valve core and the water stop section are in a sealed fit state, the bottom of the cleaning member abuts against the mounting surface; or, when the valve core and the water stop section are in a sealed fit state, the cleaning member is located above the mounting surface, and there is a gap between the bottom of the cleaning member and the mounting surface.

[0011] Preferably, the water stop section is located above the installation table.

[0012] Optionally, the cleaning member is provided with a plurality of drive blades arranged at intervals along the circumferential direction. When the valve core opens the drain outlet, the drive blades can drive the cleaning member to rotate under the impact of the water flowing to the drain outlet to clean the periphery of the water stop section.

[0013] Preferably, the driving blade is extended toward the water stop section.

[0014] Preferably, the driving blades are arranged to gradually become wider from top to bottom.

[0015] Preferably, the base includes a seat ring surrounding the outside of the drain outlet, the cleaning member is radially located between the seat ring and the drain outlet, the bottom end of the seat ring is connected to the mounting table, the top end of the seat ring is connected to the valve body, the side wall of the seat ring is provided with a flow port, and the side wall of the seat ring is also provided with a plurality of guide channels, and the guide channels are used to guide water flow to impact the driving blade from a predetermined direction.

[0016] Optionally, a plurality of flow guide members are provided on the side wall of the seat ring, and the flow guide members have the flow guide channels.

[0017] Optionally, the guide member includes a first guide member, which includes a top and a bottom arranged opposite to each other, and two first guide plates arranged at intervals between the top and the bottom. The first guide plates are arranged at an angle, and the guide channel is formed between two adjacent first guide plates.

[0018] Optionally, the guide member includes a second guide member having a second guide plate and a plurality of continuously arranged guide grooves, the guide grooves forming the guide channel, two adjacent guide grooves are separated by the second guide plate, and the second guide plate is arranged at an angle.

[0019] Preferably, a limiting protrusion is provided on the base, and the limiting protrusion limits the upward movement of the cleaning member.

[0020] Optionally, the limiting protrusion is provided on the first guide plate, or the limiting protrusion is provided on the side wall of the seat ring.

[0021] Preferably, the cleaning member has a float cavity or is made of a material with a density lower than that of water. When the valve core is sealed with the water stop section, the cleaning member is restricted to a low position by the valve core. When the valve core is separated from the water stop section, the cleaning member floats to a high position.

[0022] Preferably, an auxiliary driving port is further provided on the outer periphery of the water stop section, and the auxiliary driving port is externally connected to an auxiliary water channel for assisting the impact of the driving blade.

[0023] Optionally, the base includes a seat ring surrounding the drain outlet, the cleaning member is radially located between the seat ring and the drain outlet, the bottom end of the seat ring is connected to the mounting table, the top end of the seat ring is connected to the valve body, the side wall of the seat ring is provided with a flow opening, the longitudinal position of the cleaning member corresponds to the lower part of the flow opening, or the longitudinal position of the cleaning member corresponds to the entire flow opening.

[0024] Optionally, a retaining ring extends upward from the mounting table at the edge of the drain outlet, the top of the retaining ring forms the water stop section, the cleaning member surrounds the retaining ring, and the inner wall of the cleaning member contacts the outer wall of the retaining ring or has a gap.

[0025] Optionally, a plurality of limit buckles are provided on the top outer wall of the retaining ring.

[0026] Optionally, the drain valve further includes a driving unit that is in transmission cooperation with the cleaning member, the driving unit is used to drive the cleaning member to rotate, and the driving unit is linked to a driving switch of the drain valve.

[0027] Preferably, a plurality of regularly arranged teeth are provided on the outer wall of the cleaning member; the driving unit includes a transmission gear, which is engaged with the outside of the cleaning member; the driving unit also includes a transmission member, which has a transmission part, and the transmission part is a worm structure; a hollow rotating shaft is provided at the center of the transmission gear, and the inner wall of the rotating shaft is provided with a spiral groove that cooperates with the transmission part, so that the up and down movement of the transmission member can drive the transmission gear to move.

[0028] Preferably, the drive unit further includes a reset assembly, which includes a reset member and a cover shell. The reset member is arranged in the cover shell, and the transmission member can perform telescopic movement in the cover shell. The reset member is used to provide a reset force for the transmission member.

[0029] Preferably, the driving unit further comprises a linkage member, one end of which is connected to the transmission member, and the other end of which is connected to the driving switch of the drain valve.

[0030] Optionally, the valve core and the cleaning member are linked together to drive the cleaning member to rotate through the up and down movement of the valve core.

[0031] Optionally, the valve core includes a sealing assembly, which is separately fitted or sealed with the water stop section. The sealing assembly includes a sealing disk, and the sealing disk is provided with a pair of symmetrically arranged guide ribs. The cleaning piece is provided with a guide groove that cooperates with the guide ribs. The guide groove is an arc-shaped groove extending longitudinally, so that the cleaning piece is driven to rotate by the movement of the guide ribs in the guide groove.

[0032] Optionally, a guide piece is provided on the cleaning member, the top end of the guide piece has an opening, and the opening is bent and extended to the bottom of the guide piece to form the guide groove.

[0033] The present invention also provides a toilet, comprising a water tank and a toilet bowl, wherein the drainage channel of the water tank is connected to the toilet bowl, and the toilet comprises the above-mentioned self-cleaning drain valve, wherein the drain port of the drain valve is connected to the drainage channel.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. The self-cleaning drain valve provided by the present invention is provided with a movable cleaning member on the periphery of the water stop section of the drain outlet. This allows the cleaning member to clean the periphery of the water stop section each time the drain valve drains water, thereby preventing poor water stoppage and leakage of the drain valve, making it more reliable and avoiding waste of water resources.

[0036] 2. The drain valve cleaning member provided by the present invention is rotatably disposed on the outer periphery of the water stop section. When the member rotates, it can also form a rotating impact water flow. The rotating impact water flow can impact the outer periphery of the water stop section, thereby improving the self-cleaning effect.

[0037] 3. The cleaning member of the drain valve provided by the present invention is provided with a plurality of drive blades arranged at intervals along the circumference, so that the water flow during drainage can impact the drive blades, thereby driving the cleaning member to rotate. The water flow drives the cleaning member to rotate, eliminating the need for additional drive components and simplifying the structure.

[0038] 4. The present invention provides a plurality of guide channels on the side wall of the seat ring, and utilizes the guide channels to guide the water flow to impact the driving blades in a predetermined direction, so that the water flow flowing to the drain outlet during drainage can more effectively drive the cleaning element, resulting in a better driving effect;

[0039] 5. The drain valve provided by the present invention may also be provided with an auxiliary drive port, which is externally connected to an auxiliary drive water channel, thereby assisting in the impact of the drive blade. When the drain valve is draining, it cooperates with the water flow in the water tank to accelerate the rotation of the drive blade. Even after the drain valve outlet is closed, the auxiliary drive water channel can drive the cleaning member to rotate around the water stop section, and the water flow in the auxiliary drive water channel directly impacts the cleaning member, thereby cleaning the cleaning member.

[0040] 6. The cleaning member of the drain valve provided by the present invention can be rotated under the drive of mechanical force. The cleaning member is linked with the driving switch of the drain valve. The driving force of the driving switch is used to drive the cleaning member each time drainage occurs, thereby driving the cleaning member once each time drainage occurs, achieving the purpose of self-cleaning and convenient operation.

[0041] 7. The cleaning member of the drain valve provided by the present invention can be linked with the valve core of the drain valve. By relying on the up and down movement of the valve core, the cleaning member rotates forward and backward twice during one drainage process. This ingenious design can more effectively clean and prevent dirt from adhering to the area around the water stop section.

[0042] 8. The cleaning member of the drain valve provided by the present invention has a float chamber or is made of a material with a density lower than that of water. When the valve core and the water stop section are in sealing engagement, the cleaning member is restrained by the valve core in a low position. When the valve core and the water stop section are separated, the cleaning member floats to a high position under the buoyancy of the water. This provides a gap between the bottom of the cleaning member and the mounting surface, minimizing friction during rotation, thereby enabling a higher rotation speed and achieving a better cleaning effect.

[0043] 9. The bottom wall of the drain valve cleaning member provided by the present invention is provided with a downward slope. When draining, the cleaning member floats up. The downward slope is slightly higher than the water stop section, and upper and lower inverted cone-shaped openings are formed between the water stop section and the water flow down along the inverted cone-shaped openings, which helps to clean the water stop section. At the same time, the inverted cone-shaped openings can increase the drainage speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 : A side view of the drain valve provided in Example 1;

[0045] Figure 2 : An exploded schematic diagram of the drain valve provided in Example 1;

[0046] Figure 3 : A cross-sectional view of the drain valve provided in Example 1;

[0047] Figure 4 : A schematic diagram of the three-dimensional structure of the drain valve base provided in Example 1;

[0048] Figure 5 : A front view of the drain valve base provided in Example 1;

[0049] Figure 6 : Figure 5 Cross-sectional view of middle AA;

[0050] Figure 7 : A schematic diagram of the three-dimensional structure of the drain valve provided in Example 2;

[0051] Figure 8 : A cross-sectional view of a drain valve provided in Example 2;

[0052] Figure 9 : A schematic diagram of the three-dimensional structure of the drain valve base provided in Example 2;

[0053] Figure 10 : An exploded schematic diagram of the drain valve provided in Example 3;

[0054] Figure 11 : A schematic structural diagram of a cleaning member of a drain valve provided in Example 3;

[0055] Figure 12 : A cross-sectional view of the drain valve provided in Example 3 when the drain outlet is closed;

[0056] Figure 13 : A cross-sectional view of the drain valve provided in Example 3 at the initial stage of draining;

[0057] Figure 14 : A cross-sectional view of the drain valve provided in Example 3 during normal drainage;

[0058] Figure 15 : An exploded schematic diagram of the drain valve provided in Example 4;

[0059] Figure 16 : A three-dimensional schematic diagram of the drain valve provided in Example 4 when the drain outlet is closed;

[0060] Figure 17 : A cross-sectional view of the drain valve provided in Example 4 when the drain outlet is closed;

[0061] Figure 18 : A three-dimensional schematic diagram of the cleaning member rotating in the forward direction when the drain valve provided in Example 4 is draining water;

[0062] Figure 19 : A cross-sectional view of the cleaning member when the drain valve provided in Example 4 is draining water;

[0063] Figure 20 : A three-dimensional schematic diagram of the cleaning member rotating in the reverse direction when the drain valve provided in Example 4 is draining water;

[0064] Figure 21 : A cross-sectional view of the cleaning member when the drain valve provided in Example 4 is draining water and the cleaning member is rotating in the opposite direction;

[0065] Figure 22 : An exploded schematic diagram of a drain valve provided in Example 5;

[0066] Figure 23 : A three-dimensional schematic diagram of the drain valve provided in Example 5 when the drain outlet is closed;

[0067] Figure 24 : A cross-sectional view of the drain valve provided in Example 5 when the drain outlet is closed;

[0068] Figure 25 : A three-dimensional schematic diagram of the cleaning member rotating counterclockwise when the drain valve provided in Example 5 is draining water;

[0069] Figure 26: A three-dimensional schematic diagram of the drain valve provided in Example 5 when draining water and the guide rib moves to near the top of the guide groove (the button has been released after being pressed into place, and the sealing assembly has not yet fallen to the sealing water stop section).

[0070] In the picture:

[0071] 1. Valve body, 11. Valve core, 111. Sealing assembly, 1111. Sealing gasket, 1112. Sealing disk, 11121. Mounting disk, 11122. Guide rib, 113. Valve stem; 12. Drive switch;

[0072] 2. Base, 21. Drain, 211. Water stop, 22. Seat ring, 221. Top of seat ring, 2211. Second mounting seat, 222. Bottom of seat ring, 2221. Mounting table, 22211. First mounting seat, 22212. Perforation, 2222. Retaining ring, 22221. Limit buckle, 23. Overflow pipe, 24. Mounting groove, 25. Fixed angle, 26. Second guide member, 261. Second guide plate, 262. Guide groove, 28. Through-flow port;

[0073] 3. Cleaning member, 31. Driving blade, 32. Upper end surface, 321. Guide blade, 33. Bottom wall, 331. First connecting surface, 3311. Outer edge, 332. Lower inclined surface, 3321. Inner edge, 34. Floating cavity, 341. Lower outer wall, 342. Lower inner wall; 35. Teeth, 36. Guide groove;

[0074] 4. First guide member, 41. First guide plate, 42. Boss, 43. Attachment portion, 44. Limiting protrusion;

[0075] 5. Auxiliary drive port;

[0076] 6. Drive unit, 61. Transmission gear, 611. Rotating shaft, 62. Transmission assembly, 621. Transmission member, 6211. Transmission part, 6212. Sliding part, 62121. Limiting rib, 6213. Linkage part, 62131. Stop edge, 622. Mounting frame, 6221. Limiting groove, 63. Reset assembly, 631. Cover, 632. Spring, 64. Linkage part, 65. Third mounting seat, 651. Fixing buckle. DETAILED DESCRIPTION

[0077] The purpose of the present invention is to provide a self-cleaning drain valve that can clean the periphery of the water stop section using drainage water or mechanical force, thereby overcoming the shortcomings of the prior art. For a clearer illustration, the present invention is described in detail below with reference to the accompanying drawings.

[0078] Example 1:

[0079] Reference Figures 1-6As shown, this embodiment discloses a self-cleaning drain valve, which includes a valve body 1, a base 2, and a cleaning member 3. The base 2 is detachably fixedly connected to the bottom of the valve body 1. A valve core 11 is movably provided in the valve body 1. The base 2 is provided with a drain port 21. The valve core 11 cooperates with the drain port 21 for opening and closing. A water stop section 211 is formed at the top of the drain port 21. The valve core 11 and the water stop section 211 can be sealed or separated. Specifically, the valve core 11 includes a valve stem 113 and a sealing assembly 111 that cooperates with the valve stem 113. The sealing assembly 111 and the water stop section 211 can be sealed or separated. When the drain valve's drive switch 12 (specifically, a button) is actuated, the drive switch 12 drives the sealing assembly 111 via the valve stem 113 to open the drain outlet 21. When the drain outlet 21 is opened, the sealing assembly 111 separates from the water stop section 211, allowing water to flow through the water stop section 211 into the drain outlet 21, draining the water in the water tank into the toilet bowl. When the water in the water tank drops to a predetermined height, the sealing assembly 111 drops and seals the water stop section 211, closing the drain outlet 21 and stopping drainage.

[0080] The cleaning element 3 is movably mounted on the periphery of the water stop section 211 to clean the periphery of the water stop section 211. Specifically, in this embodiment, the cleaning element 3 is provided with a plurality of spaced-apart drive blades 31 along its circumference, extending toward the water stop section. When the drain outlet 21 is opened for drainage, the high-speed water flow continuously strikes the drive blades 31 as it flows toward the drain outlet 21, thereby driving the cleaning element 3 to rotate.

[0081] Specific, coordinated Figure 2-Figure 4 As shown, the cleaning element 3 includes driving blades 31, an upper end surface 32, and a bottom wall 33. The driving blades 31 are spaced apart and connected between the upper end surface 32 and the bottom wall 33. An internal and external through-hole is formed between two adjacent driving blades 31, allowing water to impact the side walls of the driving blades 31. The driving blades 31 are arranged from narrow to wide along the direction from the upper end surface 32 to the bottom wall 33. The connection between the top surface and the side surface of the driving blades 31 is configured as a smooth arc-shaped transition, which facilitates the driving blades 31 to drive the cleaning element 3 to rotate under the impact of the water flow. Because the bottom wall 33 is connected to the bottom / wide part of the driving blades 31, the width of the bottom wall 33 is equal to or slightly larger than the width of the bottom of the driving blades 31.

[0082] Cooperate Figure 2-Figure 4As shown, the base 2 includes a seat ring 22 and an overflow pipe 23. The overflow pipe 23 is connected to the drain outlet 21. The water inlet of the overflow pipe 23 is connected to the water tank of the toilet, and the water outlet is connected to the drain outlet 21. The water outlet is arranged below the water stop section 211. Therefore, when the water level in the water tank exceeds the height of the overflow pipe 23, the water flow can directly flow into the drain outlet 21 from the water outlet of the overflow pipe 23, which can prevent the water level in the water tank from rising and overflowing out of the water tank due to the inability to stop water inlet when the water inlet device of the water tank fails.

[0083] Further, refer to Figure 2-Figure 6 As shown, the seat ring 22 surrounds the drain outlet 21, and the cleaning member 3 is located between the seat ring 22 and the drain outlet 21 in the radial direction. The seat ring 22 includes a top end 221, a bottom end 222, and a side wall of the seat ring connecting the top end 221 and the bottom end 222. The outer periphery of the drain outlet 21 is provided with a mounting table 2221, and the water stop section 211 is located above the mounting table 2221. When the valve core 11 and the water stop section 211 are in a sealed mating state, the bottom of the cleaning member 3 abuts against the mounting table 2221 (refer to FIG. Figure 3 The bottom end 222 of the seat ring 22 is connected to the mounting surface 2221, and the top end 221 of the seat ring 22 is connected to the valve body 1. The side wall of the seat ring 22 is provided with a flow opening 28 for supplying water from the water tank to the drain outlet 21. The side wall of the seat ring 22 is also provided with a plurality of diversion channels, which are used to guide the water flow from a predetermined direction to impact the driving blades. The diversion channels can directly form the flow opening; or the diversion channels can be formed within the flow opening 28, that is, the diversion channels are part of the flow opening, and the water flows through the flow opening 28 under the guidance of the diversion channels.

[0084] The guide channel can be obtained by setting a guide member. Specifically, a plurality of guide members can be installed on the side wall of the seat ring 22, and the guide member is provided with a guide channel for guiding the water flow to impact the driving blade 31 from a predetermined direction. The guide member can be integrally formed with the seat ring 22, or the two can be separately formed and fixedly connected together. The guide member includes a first guide member 4, and a plurality of first guide members 4 are arranged on the side wall of the seat ring 22. The first guide member 4 and the seat ring 22 are separately formed and fixedly connected together. Specifically, the first guide member 4 includes a top and a bottom that are relatively arranged, and two first guide plates 41 (see Figure 6), the first guide plate 41 is tilted and is used to guide the flow of water so that the drainage water flow can better impact the driving blades 31, and then the cleaning member 3 rotates. The guide channel is formed between two adjacent first guide plates 41. Matching mounting grooves 24 are provided on the outer side walls of the top 221 of the seat ring and the mounting table 2221. The top and bottom of the first guide member 4 are also respectively provided with bosses 42 that adapt to the mounting grooves 24. The bosses 42 and the mounting grooves 24 can be a structure in which one of them is small on the top and large on the bottom, and the other is a structure in which the other is large on the top and small on the bottom, so that when the two are matched, the two inclined surfaces at the junction generate abutment force, making the connection between the two more stable and not easy to loosen. The top and bottom of the first guide member 4 can also be symmetrically provided with mounting portions 43 on one side close to the boss 42, such as Figure 2 As shown, the attachment parts 43 can be symmetrical in pairs, with a total of 4 (including 2 at the top and 2 at the bottom). A fixed angle 25 is also adapted near the attachment groove 24 of the base 2. The fixed angle 25 matches the attachment part 43 one by one, thereby further improving the stability of the connection between the first guide member 4 and the base 2. A limiting protrusion 44 is also provided on the side of the first guide plate 41 close to the water stop section 211. The limiting protrusion 44 is used to limit the cleaning member 3, limit the upward movement of the cleaning member 3, and prevent the cleaning member 3 from moving up and down. The position of the limiting protrusion 44 is matched with the height of the cleaning member 3 and can also be adjusted as needed. In this embodiment, refer to Figure 3 As shown, the distance from the bottom of the first guide member 4 to the limiting protrusion 44 is roughly the same as the height of the cleaning member 3, and the limiting effect is good. In addition to setting the limiting protrusion 44 on the first guide member 4, it can also be directly set on the side wall of the base 22, such as Figure 2 、 Figure 3 and Figure 5 Two oppositely arranged limiting protrusions 44 are also provided on the side wall of the seat ring.

[0085] The guide member may further include a second guide member 26, which has a second guide plate 261 and a plurality of continuously arranged guide grooves 262. Two adjacent guide grooves 262 are separated by the second guide plate 261. The guide channel is formed in the guide groove 262. The second guide plate 261 is inclined. The second guide member 26 can be an integral structure with the seat ring 22. Specifically, the two are formed into an integral structure by an integral molding method. That is, the second guide member 26 is a part of the side wall of the seat ring 22. In this embodiment, refer to Figure 2 As shown, the second guide member 26 has four guide plates 21 arranged at intervals, and a guide groove 262 is formed between two adjacent guide plates. The two ends of the guide groove 262 are connected to form the guide channel. The guide plate 26 is arranged at an angle, and its inclination direction is not parallel to the setting direction of the driving blade 31 on the inner wall of the cleaning member 3, thereby guiding the water flow to hit the driving blade 31 more forcefully, so that the cleaning member 3 rotates faster and more steadily.

[0086] The drain valve provided in this embodiment may further include an auxiliary drive port 5, which may be disposed on the periphery of the water stop section 211, specifically above the mounting surface 2221 and abutting against the outer extension of the mounting surface 2221. The auxiliary drive port 5 is externally connected to an auxiliary drive waterway, which assists in impacting the drive blades 31. During drainage, the auxiliary drive waterway cooperates with the water flow from the water tank to accelerate the rotation of the drive blades 31. Alternatively, even after the drain valve is closed, the auxiliary drive waterway can drive the cleaning element 3 to rotate. The water flow from the auxiliary drive waterway directly impacts the cleaning element 3, thereby cleaning the cleaning element 3.

[0087] In this embodiment, the longitudinal position of the cleaning member 3 corresponds to the lower portion of the through-flow opening 28 (refer to Figure 5 In this way, the cleaning member only blocks the lower portion of the through-flow opening 28, which has little effect on the drainage speed.

[0088] In this embodiment, a cleaning member 3 with a driving blade 31 is designed to surround the outer periphery of the water stop section 211. When the drain valve is opened, the high-speed drainage water flow impacts the driving blade 31 to rotate the cleaning member 3, thereby generating a rotating water flow. The rotation of the cleaning member 3 and the rotating water flow are then used to clean the circumference of the water stop section 211 and the cleaning member 3 itself, thereby avoiding the accumulation of dirt on the outer periphery of the water stop section 211 (for example, the installation table 2221) and preventing it from affecting the water-stopping effect of the drain valve.

[0089] Example 2:

[0090] The drain valve structure provided in this embodiment is similar to that of embodiment 1 except that: Figures 7 to 9 As shown, in this embodiment, the cleaning member 3 is longitudinally positioned to correspond to the entire flow opening 28. In this case, the limiting protrusion 44 may not be provided on the first flow guide member 4 or the side wall of the seat ring. The cleaning member 3 blocks the entire flow opening 28 (at the same height in the longitudinal direction). The cleaning member 3 rotates at a higher speed, which is more conducive to self-cleaning. However, the cleaning member 3 of this embodiment has a greater impact on the drainage speed of the drain valve than in Example 1.

[0091] Example 3:

[0092] The drain valve structure provided in this embodiment is basically similar to that of embodiment 1, except for the partial design of the cleaning member 3, the first flow guide member 4 and the base 2. The specific differences are as follows.

[0093] Reference Figure 10-14As shown, the cleaning member 3 of this embodiment includes the same structure as that of Example 1, and further includes a buoyancy structure connected to the bottom wall of the cleaning member 3, the buoyancy structure having a float chamber 34. When the valve core 11 is in sealing engagement with the water stop section 211, the cleaning member 3 is restrained in a low position by the valve core 11. When the valve core 11 and the water stop section 211 are separated, the cleaning member 3 floats to a high position under the buoyancy of the float chamber 34.

[0094] Specifically, refer to Figure 10 and Figure 11 As shown, the float chamber 34 is arranged below the bottom wall 33 , and the bottom wall 33 of the cleaning element 3 is the top wall of the float chamber 34 .

[0095] The bottom wall 33 includes an inner edge 3321 and an outer edge 3311. The outer edge 3311 extends downward to form a lower outer wall 341, while the inner edge 3321 extends downward to form a lower inner wall 342. The lower outer wall 341, lower inner wall 342, and bottom wall 33 together constitute the buoyancy structure, enclosing a cavity, namely, the float chamber 34. The top wall of the float chamber 31 is the bottom wall 33, and the bottom end of the float chamber 34 forms an opening. In this embodiment, the opening of the float chamber 34 covers the entire annular area between the lower outer wall 341 and the lower inner wall 342. In other embodiments, the opening of the float chamber 34 may be provided only in a portion of this annular area. Alternatively, in other embodiments, the bottom end of the float chamber 34 may not have an opening, and the float chamber 34 may be enclosed on all sides, i.e., the buoyancy structure has an internal cavity. Whether the buoyancy structure has an opening is not restricted, as long as it can form a cavity and thus provide buoyancy.

[0096] In other embodiments, the cleaning member 3 may not be provided with the float cavity 34 , and the cleaning member 3 may be made of a material with a density lower than that of water, such as a plastic material with a density lower than that of water.

[0097] In this embodiment, the sealing assembly 111 includes a sealing gasket 1111 and a sealing disc 1112. The sealing gasket 1111 is annular, and the sealing disc 1112 has an annular groove, in which the sealing gasket 1111 is embedded. When the valve core 11 is in sealing engagement with the water stop section 211, the sealing disc 1112 or the annular sealing gasket 1111 abuts against the bottom wall 33 of the cleaning member 3.

[0098] Cooperate Figure 10-14 As shown, the bottom wall 33 of the cleaning member 3 may include a first connecting surface 331 and a lower inclined surface 332, the lower inclined surface 332 being connected to the inner periphery of the first connecting surface 331, the first connecting surface 331 having an outer edge 3311, the lower inclined surface 332 having an inner edge 3321, and the lower inclined surface 322 extending downwardly from the outside to the inside along the radial direction of the movable member 3 to the inner edge 3321.

[0099] Since the limiting protrusion 44 is used to limit the upward movement of the cleaning member 3, and the cleaning member 3 provided in this embodiment also has a floating cavity 34, Figure 10 、 Figure 11-14 As shown, when the valve core 11 and the water stop section 211 are in a sealed fit state, the cleaning member 3 is located above the mounting table 2221, and there is a gap between the bottom of the cleaning member 3 and the mounting table 2221 (refer to Figure 12 (as shown), at this time, the cleaning member 3 is restrained in the low position by the valve core 11. When the valve core 11 and the water stop section 211 are in a disengaged state, the cleaning member 3 floats to a position where it abuts the limiting protrusion 44. At this time, the cleaning member 3 floats to the high position under the buoyancy of the float chamber 34. The present invention can also use the limiting protrusion 44 to adjust the floating height or upward stroke height of the movable member 3, thereby adjusting the area of ​​the flow opening 28 blocked by the movable member 3, and thus adjusting the drainage speed.

[0100] In this embodiment, a retaining ring 2222 can also be extended upward from the mounting table 2221 to form a water stop section 211 at the top of the retaining ring 2222. The cleaning part 3 is surrounded by the retaining ring 2222, and the inner wall of the cleaning part 3 is in contact with the outer wall of the retaining ring 2222 or has a gap.

[0101] When the drain valve is in the state where the drain port 21 is closed, refer to Figure 12 As shown, the sealing assembly 111 seals the water stop section 211. Under the pressure of the sealing assembly 111, the float chamber 34 of the cleaning member 3 is limited in the accommodation space formed by the mounting table 2221 and the retaining ring 2222. The cleaning member 3 is located above the mounting table 2221. A gap is formed between the bottom of the cleaning member 3 and the mounting table 2221. The sealing disk 1112 or the annular sealing gasket 1111 abuts against the bottom wall 33 of the cleaning member 3.

[0102] When the driving switch 12 of the drain valve is driven, the sealing component 111 moves upward through the valve stem 113, and is separated from the water stop section 211 to drain water. In the process of the sealing component 111 moving upward, Figure 13 As shown, since the cleaning member 3 has a float cavity 34, under the action of buoyancy, the cleaning member 3 floats up with the sealing assembly 111, which can appropriately reduce the force value of the drive switch 12 (button) that initially drives the drain valve. Finally, the cleaning member 3 floats to abut against the limiting protrusion 44, and is thus limited in this position. After the drain outlet 21 is opened, the high-speed drainage water flow hits the drive blades 31 arranged around the cleaning member 3 during the process of flowing to the drain outlet 21, thereby driving the cleaning member 3 to rotate, so that a rotating water flow is formed near the water stop section 211, and then the rotation of the cleaning member 3 and the rotating water flow are used to clean the water stop section 211 and its surrounding area, such as the installation table 2221, to avoid the accumulation of dirt near the water stop section.

[0103] When the drain port 21 is open and the drain valve is in a normal draining state, the cleaning member 3 continues to be limited in the aforementioned position by the limiting protrusion 44. Figure 14As shown, when draining, the cleaning member 3 floats up, and the lower slope 332 of the cleaning member 3 is slightly higher than the water stop section 211, forming an upper and lower inverted cone opening between the cleaning member 3 and the water stop section 211, thereby draining water from the top to the bottom slope, which helps to clean the water stop section 211, and the inverted cone opening can increase the drainage speed. Figure 14 As shown, specifically, in one embodiment, the angle formed by the lower inclined surface 332 and the water stop section 211 is 157°.

[0104] When the sealing component 111 of the drain valve falls to close the drain outlet 21, since the cleaning component 3 floats up during the previous drainage, the bottom wall 33 of the cleaning component 3 is higher than the water stop section 211. Therefore, when the sealing component 111 falls, it needs to overcome the buffering buoyancy of the float chamber 34 of the cleaning component 3 before falling to the water stop section 211 and sealing the water stop section 211. In other words, the valve core 11 is buffered by the cleaning component 3 during the falling process. This helps to appropriately improve the problem that the sealing component 111 directly descends to cooperate with the water stop section 211, which has great potential energy and causes loud noise.

[0105] Example 4:

[0106] Reference Figures 15-21 As shown, this embodiment discloses a self-cleaning drain valve, which includes a valve body 1, a base 2, and a cleaning member 3. The base 2 is detachably fixed to the bottom of the valve body 1. A valve core 11 is movably disposed within the valve body 1, and the base 2 is provided with a drain outlet 21. The valve core 11 cooperates with the drain outlet 21 for opening and closing. A water stop section 211 is formed at the top of the drain outlet 21. The valve core 11 and the water stop section 211 are sealed or separated. Specifically, the valve core 11 includes a valve stem 113 and a sealing assembly 111 that cooperates with the valve stem 113. The sealing assembly 111 and the water stop section 211 are sealed or separated. When the drive switch 12 of the drain valve is actuated (here, the drive switch 12 is specifically a button), the drive switch 12 drives the sealing assembly 111 through the valve stem 113 to open the drain outlet 21. When the drain outlet 21 is opened, the sealing assembly 111 separates from the water stop section 211, and water flows from the water stop section 211 into the drain outlet 21, thereby draining the water in the water tank into the toilet bowl. When the water in the water tank drops to a predetermined height, the sealing assembly 111 falls and seals the water stop section 211 , closing the drain port 21 and stopping drainage.

[0107] The sealing assembly 111 is connected to the bottom of the valve stem 113. Pressing the drive switch 12 (button) lifts the valve stem 113 and the sealing assembly 111. The sealing assembly 111 is separated from the water stop section 211, and the drain valve drains water.

[0108] Reference Figure 15-17As shown, the base 2 includes a seat ring 22 and an overflow pipe 23. The overflow pipe 23 is connected to the drain outlet 21. The water inlet of the overflow pipe 23 is connected to the water tank of the toilet, and the water outlet is connected to the drain outlet 21. The water outlet is arranged below the water stop section 211. Therefore, when the water level in the water tank exceeds the height of the overflow pipe 23, the water flow can directly flow into the drain outlet 21 from the water outlet of the overflow pipe 23, which can prevent the water level in the water tank from rising and overflowing out of the water tank due to the inability to stop water inlet when the water inlet device of the water tank fails.

[0109] The seat ring 22 surrounds the drain outlet 21, and the cleaning member 3 is radially located between the seat ring 22 and the drain outlet 21. The seat ring 22 includes a top end 221, a bottom end 222, and a side wall of the seat ring connecting the top end 221 and the bottom end 222. The outer periphery of the drain outlet 21 is provided with a mounting surface 2221, and the water stop section 211 is located above the mounting surface 2221. When the valve core 11 and the water stop section 211 are in a sealed state, the bottom of the cleaning member 3 abuts against the mounting surface 2221 (refer to FIG. Figure 16 The bottom end 222 of the seat ring 22 is connected to the mounting table 2221, and the top end 221 of the seat ring 22 is connected to the valve body 1. The side wall of the seat ring 22 is provided with a flow port 28, which is used to allow water in the water tank to flow into the drain outlet 21. The edge of the drain outlet 21 can also extend upward from the mounting table 2221 to form a retaining ring 2222. The top end of the retaining ring 2222 forms a water stop section 211. The cleaning member 3 surrounds the retaining ring 2222, and the inner wall of the cleaning member 3 contacts or has a gap with the outer wall of the retaining ring 2222. A plurality of limiting buckles 22221 are also provided at intervals along the circumference on the top outer wall of the retaining ring 2222. The limiting buckles 22221 are used to limit the cleaning member 3 and restrict its upward movement. Their function is the same as that of the limiting protrusion 44 of the first embodiment.

[0110] Reference Figure 15 As shown, the cleaning member 3 is a hollow annular structure, and a plurality of regularly arranged teeth 35 are provided on the outer wall of the annular structure. The height of the cleaning member 3 can be less than or approximately equal to the height of the retaining ring 2222.

[0111] The drain valve provided in this embodiment also includes a driving unit 6 capable of driving the cleaning member 3 to rotate, Figure 15 、 Figure 16 and Figure 17As shown, the drive unit 6 further includes a transmission gear 61 that is in transmission cooperation with the cleaning member 3. The transmission gear 61 is meshed with the teeth 35 of the cleaning member 3 through the teeth to achieve transmission. The drive unit 6 also includes a transmission assembly 62, a reset assembly 63 and a linkage member 64, wherein the transmission assembly 62 includes a transmission member 621 and a mounting frame 622, and the transmission member 621 includes a transmission part 6211, a sliding part 6212 and a linkage part 6213 connected in sequence. A hollow rotating shaft 611 is provided at the center of the transmission gear 61, and the inner wall of the rotating shaft 611 is provided with a spiral groove. The transmission part 6211 is a worm structure, which is in transmission cooperation with the spiral groove, so that the transmission member 621 can drive the transmission gear 61 to rotate by moving up and down. The surface of the sliding portion 6212 is provided with a limiting rib 62121, and the inner wall of the mounting frame 622 is provided with a limiting groove 6221 that matches the limiting rib 62121. The mounting frame 622 is sleeved over the sliding portion 6212 and a portion of the outer wall of the transmission portion 6211. One side of the mounting surface 2221 of the seat ring 22 extends outward to form a first mounting seat 22211. The first mounting seat 22211 is mounted on the transmission gear 61. Specifically, the rotating shaft 611 of the transmission gear 61 is inserted into the first mounting seat 22211. A second mounting seat 2211 is provided at the top end 221 of the seat ring 22, parallel to the first mounting seat 22211. The bottom of the mounting frame 622 is attached to this second mounting seat 2211. The reset assembly 63 includes a housing 631 and a reset member mounted within the housing 631, such as a spring 632. The housing 631 includes a through-channel sized to match the linkage portion 6213, allowing the linkage portion 6213 to telescope within the through-channel. A retaining edge 62131 is provided on the outer wall of the linkage portion 6213. The retaining edge 62131 is wider than the through-channel and located within the through-channel, thereby limiting the telescopic movement of the linkage portion 6213. The spring 632 is sleeved over the sliding portion 6212 and the linkage portion 6213 to provide a reset force for the transmission member 621. One end of the linkage member 64 is connected to the top of the linkage portion 6213, and the other end is connected to the drive switch 12. The transmission gear 61 and transmission assembly 62 of the drive unit 6 are connected to the base 2 via the first mounting seat 22211 and the second mounting seat 2211, respectively. To further secure the installation of the drive unit 6, a third mounting seat 65 may be provided. The third mounting seat 65 may have two fixing rings, one of which is sleeved with the drive switch 12, and the other is sleeved with the cover 631. The fixing ring sleeved with the cover 631 may also be provided with a fixing buckle 651. The outer wall of the cover 631 may be provided with a fixing ring, and the fixing buckle 651 is engaged with the fixing ring to further secure the connection between the drive unit 6 and the valve body 1.

[0112] Reference Figure 16 and Figure 17As shown, when the drain port 21 is in the closed state, the retaining edge 62131 abuts against the top wall of the cover 631, and the spring 632 is in a normal state without being compressed;

[0113] Reference Figure 18 and Figure 19 As shown, when the driving switch 12 of the drain valve is pressed down to drain water, in the process of pressing the driving switch 12, the driving switch 12 drives the linkage part 6213 to move downward, the blocking edge 62131 no longer abuts the top wall of the cover shell 631, and the spring 632 is compressed. As the transmission member 621 moves downward, the transmission part 6211 drives the transmission gear 61 to rotate, and the rotation of the transmission gear 61 drives the cleaning member 3 to move forward (clockwise), so that a rotating water flow is formed near the water stop section 211, and then the rotation of the cleaning member 3 and the rotating water flow are used to clean the periphery of the water stop section 211 and the cleaning member 3 itself, thereby avoiding the accumulation of dirt near the water stop section 211 (for example, the installation table 2221); in this embodiment, referring to Figure 15 As shown, the installation table 2221 is further provided with a through hole 22212 which runs through from top to bottom. The through hole 22212 can prevent water flow and dirt accumulation on the installation table 2221, thereby improving the cleaning effect.

[0114] Reference Figure 20 and Figure 21 As shown, when the driving switch 12 is stopped from being pressed, the drain valve is still draining normally. The aforementioned compressed spring 632 provides a reset force to drive the transmission member 621 to move upward. At this time, the transmission part 6211 drives the transmission gear 61 to rotate, and the rotation of the transmission gear 61 drives the cleaning member 3 to move in the opposite direction (counterclockwise), and continues to clean the periphery of the water stop section 211 and the cleaning member itself.

[0115] This embodiment designs the driving unit 6 that drives the cleaning member 3 to rotate to be linked with the existing driving switch 12 of the drain valve, so that the driving switch 12 and the cleaning member 3 are linked and coordinated, and relies on the up and down movement of the transmission member 621 to achieve two rotations of the cleaning member 3 in the forward and reverse directions during one drainage process. The design is ingenious and can clean more effectively, avoiding the adhesion of dirt around the water stop section.

[0116] Example 5:

[0117] Reference Figure 22-26As shown, this embodiment discloses a self-cleaning drain valve, which includes a valve body 1, a base 2, and a cleaning member 3. The base 2 is detachably fixed to the bottom of the valve body 1. A valve core 11 is movably provided in the valve body 1. The base 2 is provided with a drain outlet 21. The valve core 11 cooperates with the drain outlet 21 for opening and closing. A water stop section 211 is formed at the top of the drain outlet 21. The valve core 11 and the water stop section 211 are sealed or separated. Specifically, the valve core 11 includes a valve stem 113 and a sealing assembly 111 that cooperates with the valve stem 113. The sealing assembly 111 and the water stop section 211 are sealed or separated. When the driving switch 12 (here, the driving switch 12 is specifically a button) of the drain valve is driven to drive the sealing assembly 111 to open the drain outlet 21, the sealing assembly 111 is separated from the water stop section 211, and the water flows from the water stop section 211 into the drain outlet 21, thereby draining the water in the water tank into the toilet bowl. When the water in the water tank drops to a predetermined height, the sealing assembly 111 falls and seals the water stop section 211 , the drain port 21 is closed, and drainage stops.

[0118] The sealing assembly 111 is connected to the bottom of the valve stem 113. Pressing the drive switch 12 (button) lifts the valve stem 113 and the sealing assembly 111. The sealing assembly 111 is separated from the water stop section 211, and the drain valve drains water.

[0119] Reference Figure 22 As shown, the base 2 includes a seat ring 22 and an overflow pipe 23. The overflow pipe 23 is connected to the drain outlet 21. The water inlet of the overflow pipe 23 is connected to the water tank of the toilet, and the water outlet is connected to the drain outlet 21. The water outlet is arranged below the water stop section 211. Therefore, when the water level in the water tank exceeds the height of the overflow pipe 23, the water flow can directly flow into the drain outlet 21 from the water outlet of the overflow pipe 23, which can prevent the water level in the water tank from rising and overflowing out of the water tank due to the inability to stop water inlet when the water inlet device of the water tank fails.

[0120] The seat ring 22 surrounds the drain outlet 21, and the cleaning member 3 is radially located between the seat ring 22 and the drain outlet 21. The seat ring 22 includes a top end 221, a bottom end 222, and a side wall of the seat ring connecting the top end 221 and the bottom end 222. The outer periphery of the drain outlet 21 is provided with a mounting surface 2221, and the water stop section 211 is located above the mounting surface 2221. When the valve core 11 and the water stop section 211 are in a sealed state, there is a gap between the bottom of the cleaning member 3 and the mounting surface 2221 (refer to Figure 24As shown); the bottom end 222 of the seat ring 22 is connected to the mounting table 2221, and the top end 221 of the seat ring 22 is connected to the valve body 1. The side wall of the seat ring 22 is provided with a flow port 28, which is used for the water in the water tank to flow into the drain port 21. The edge of the drain port 21 can also extend upward from the mounting table 2221 to form a retaining ring 2222. The top end of the retaining ring 2222 forms a water stop section 211. The cleaning member 3 surrounds the retaining ring 2222, and the inner wall of the cleaning member 3 contacts the outer wall of the retaining ring 2222 or has a gap. Figure 22 and Figure 24 As shown, the sealing assembly 111 includes a sealing gasket 1111 and a sealing disc 1112. The sealing gasket 1111 is annular and has an annular groove. The sealing gasket 1111 is embedded in the annular groove. The sealing disc 1112 includes a mounting disc 11121 and guide ribs 11122. The guide ribs 11122 are arranged on the outer wall of the mounting disc 11121. In this embodiment, there are two guide ribs 11122, which are symmetrically arranged.

[0121] Please continue to refer to Figure 22-26 As shown, the cleaning member 3 is movably positioned around the outer circumference of the retaining ring 2222. A guide groove 36 is provided on the cleaning member 3, which mates with the guide rib 11122. Specifically, the cleaning member 3 comprises an upper end surface 32 and an open bottom. Two guide grooves 36 are provided, opposite each other, on the upper end surface 32. More specifically, two guide blades 321 extend upward from the upper end surface 32 at two locations. The tops of the guide blades 321 are provided with openings that mate with the guide rib 11122. These openings curve and extend to the bottoms of the guide blades 321 to form the guide grooves 36. The guide grooves 36 are longitudinally extending arcuate grooves. The shapes of the two guide grooves 36 match to enable the guide rib 11122 to drive the cleaning member 3 in rotation. The cleaning member 3 has a float chamber 34 with the aforementioned open bottom. The float chamber 34 can also be a closed cavity on all sides. The structural design of the float chamber 34 is the same as that of Example 3 and will not be further described here.

[0122] Reference Figure 23 and Figure 24 As shown, when the drain outlet 21 is in a closed state, the sealing assembly 111 seals the water stop section 211, the guide rib 11122 is located at the bottom of the guide groove 36, the float cavity 34 of the cleaning member 3 is limited in the accommodating space formed by the mounting table 2221 and the retaining ring 2222, and the sealing disk 1112 or the annular sealing gasket 1111 abuts against the upper end surface 32 of the cleaning member 3.

[0123] Reference Figure 25As shown, when the driving switch 12 of the drain valve is pressed down to drain water, during the process of pressing the driving switch 12, the sealing component 111 moves upward to open the drain port 21, and the guide rib 11122 on the sealing component 111 moves upward along the guide groove 36 to drive the cleaning member 3 to move counterclockwise, thereby cleaning the periphery of the water stop section 211, until the driving switch 12 is pressed into place and the guide rib 11122 moves to near the top of the guide groove 36 (see FIG. Figure 26 );

[0124] When the sealing component 111 falls, the guide rib 11122 on the sealing component 111 moves downward along the guide groove 36 and then drives the cleaning member 3 to rotate clockwise back to its position, thereby continuing to clean the periphery of the water stop section 211. During the falling process of the sealing component 111, it is necessary to overcome the friction generated by the turning of the guide groove 36, and before contacting the water stop section, it is necessary to overcome the buffering buoyancy provided by the float cavity 34 of the cleaning member 3 before it can fall to the sealed water stop section to stop water. That is to say, the valve core 11 is buffered by the cleaning member 3 during the falling process. This also helps to improve the problem that the existing drain valve sealing disk directly falls to cooperate with the water stop section, the potential energy is too large, and the collision noise is large.

[0125] In this embodiment, the valve core 11 and the cleaning member 3 are linked together. By designing a pair of symmetrically arranged guide ribs 11122 on the sealing assembly 111 of the valve core 11, and cooperating with the cleaning member 3 having a guide groove 36, the cleaning member 3 can rotate under the cooperation of the guide ribs 11122 and the guide groove 36, thereby generating a rotating water flow. The rotating water flow and the rotation of the cleaning member 3 are used to clean the circumference of the water stop section 211 and the cleaning member 3 itself, thereby avoiding the problem of long-term use of the existing drain valve, where dirt accumulates on the periphery of the water stop section, resulting in poor water stop effect, water seepage and leakage, and waste of water resources. At the same time, this embodiment relies on the up and down movement of the sealing assembly 111 to achieve two rotations of the cleaning member 3 in the forward and reverse directions during a drainage process. The design is ingenious and can clean more effectively, avoiding the adhesion of dirt around the water stop section 211.

[0126] Example 6:

[0127] This embodiment discloses a toilet, which includes a water tank and a toilet bowl, wherein the drainage channel of the water tank is connected to the toilet bowl, and further includes the self-cleaning drain valve described in embodiment 1 or 2 or 3 or 4 or 5, wherein the drain valve is provided with a drain outlet, and the drain outlet is connected to the drainage channel.

[0128] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the same. Although the above embodiments provide a detailed description of the present invention, relevant technical personnel should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modifications and equivalent replacements that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A self-cleaning drain valve, characterized by: include: The valve body is provided with a valve core; The base is provided with a drain port and is fixedly connected to the valve body. The top of the drain port forms a water stop section. The valve core and the water stop section are sealed to close the drain port or separated to open the drain port. A cleaning member is movably arranged on the outer periphery of the water stop section to clean the outer periphery of the water stop section.

2. The self-cleaning drain valve according to claim 1, characterized in that: The cleaning element is arranged on the outer periphery of the water-stopping section so as to be rotatable or to slide back and forth up and down.

3. The self-cleaning drain valve according to claim 2, characterized in that: A mounting surface is provided on the outer periphery of the drain outlet, and when the valve core and the water stop section are in a sealed fit state, the bottom of the cleaning member abuts against the mounting surface; or, when the valve core and the water stop section are in a sealed fit state, the cleaning member is located above the mounting surface, and there is a gap between the bottom of the cleaning member and the mounting surface.

4. The self-cleaning drain valve according to claim 3, characterized in that: The water stop section is located above the installation table.

5. The self-cleaning drain valve according to claim 3, characterized in that: The cleaning member is provided with a plurality of drive blades arranged at intervals along the circumferential direction. When the valve core opens the drain outlet, the drive blades can drive the cleaning member to rotate under the impact of the water flow flowing to the drain outlet to clean the outer periphery of the water stop section.

6. The self-cleaning drain valve according to claim 5, characterized in that: The base includes a seat ring surrounding the outside of the drain outlet, the cleaning member is radially located between the seat ring and the drain outlet, the bottom end of the seat ring is connected to the mounting table, the top end of the seat ring is connected to the valve body, the side wall of the seat ring is provided with a flow port, and the side wall of the seat ring is also provided with a plurality of guide channels, the guide channels are used to guide water flow to impact the driving blade from a predetermined direction.

7. The self-cleaning drain valve according to claim 5, characterized in that: A limiting protrusion is provided on the base, and the limiting protrusion limits the upward movement of the cleaning member.

8. The self-cleaning drain valve according to claim 5, characterized in that: The cleaning member has a float cavity or is made of a material with a density lower than that of water. When the valve core is sealed with the water stop section, the cleaning member is restricted to a low position by the valve core. When the valve core is separated from the water stop section, the cleaning member floats to a high position.

9. The self-cleaning drain valve according to claim 5, characterized in that: The base is also provided with an auxiliary driving port, which is externally connected to an auxiliary water channel for assisting the impact of the driving blades.

10. The self-cleaning drain valve according to claim 3, characterized in that: The base includes a seat ring surrounding the drain outlet, the cleaning member is radially located between the seat ring and the drain outlet, the bottom end of the seat ring is connected to the mounting table, the top end of the seat ring is connected to the valve body, the side wall of the seat ring is provided with a flow opening, the longitudinal position of the cleaning member corresponds to the lower part of the flow opening, or the longitudinal position of the cleaning member corresponds to the entire flow opening.

11. The self-cleaning drain valve according to claim 3, characterized in that: A retaining ring extends upward from the mounting table at the edge of the drain outlet, the top of the retaining ring forms the water stop section, the cleaning member surrounds the retaining ring, and the inner wall of the cleaning member contacts the outer wall of the retaining ring or has a gap.

12. The self-cleaning drain valve according to claim 1, characterized in that: It also includes a driving unit that is in transmission cooperation with the cleaning member, and the driving unit is used to drive the cleaning member to rotate, and the driving unit is linked to the driving switch of the drain valve.

13. The self-cleaning drain valve according to claim 12, characterized in that: A plurality of regularly arranged teeth are provided on the outer wall of the cleaning member; the driving unit includes a transmission gear, which is engaged with the outside of the cleaning member; the driving unit also includes a transmission member, which has a transmission part, and the transmission part is a worm structure; a hollow rotating shaft is provided at the center of the transmission gear, and the inner wall of the rotating shaft is provided with a spiral groove that cooperates with the transmission part, so that the transmission member can drive the transmission gear to move when it moves up and down.

14. The self-cleaning drain valve according to claim 1, characterized in that: The valve core is linked with the cleaning member so that the cleaning member is driven to rotate by the up and down movement of the valve core.

15. The self-cleaning drain valve according to claim 14, characterized in that: The valve core includes a sealing assembly, which is separately fitted or sealed with the water stop section. The sealing assembly includes a sealing disk, on which is provided a pair of symmetrically arranged guide ribs. The cleaning piece is provided with a guide groove that cooperates with the guide ribs. The guide groove is an arc-shaped groove extending longitudinally, so that the cleaning piece is driven to rotate by the movement of the guide ribs in the guide groove.

16. A toilet comprising a water tank and a toilet bowl, wherein a drainage channel of the water tank is connected to the toilet bowl, characterized in that: It also includes the self-cleaning drain valve according to any one of claims 1 to 15, wherein the drain port of the drain valve is connected to the drain channel.

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