Drain valve and toilet bowl

Abstract

The application discloses a kind of drain valve and toilet. Drain valve includes base, valve body, driven assembly, first valve plate and overflow pipe. Valve body is provided with accommodating cavity, first water inlet, first water outlet and first flow channel. Base is fixedly connected with valve body, and the base is provided with second flow channel and second water inlet. Driven assembly includes follower, and the follower is located in the accommodating cavity, and the follower can move in the first direction under the action of external water. First valve plate includes mutually connected blocking part and first connecting part, the blocking part blocks the second water inlet, and the first connecting part is connected with the follower. The follower can drive the first valve plate to move in the first direction away from the base to the blocking part to separate from the second water inlet. Overflow pipe is provided with third flow channel, and the third flow channel includes mutually communicated first channel segment and second channel segment, the first channel segment is communicated with the first flow channel, and the second channel segment is communicated with the second flow channel. The application can improve the water pressure of the water discharged by the drain valve.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bathroom, in particular to a drain valve and a toilet. BACKGROUND

[0002] In the related art, the flushing of the closestool is usually controlled by an electric water pump, or the closestool can also be flushed by driving a metal traction structure with an electric motor to open the valve. However, the electric water pump, the electric motor and the steel cable are all arranged in the water tank, and the evaporation of water vapor in the water tank will corrode the electronic components and the metal traction structure, affecting the service life of the drain valve. Although a scheme for controlling the opening and closing of the valve by using external water is proposed in the related art, the drain valve of the related scheme has the problem of insufficient flushing force when applied to the closestool, and therefore it is necessary to research and improve the above-mentioned problems. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application proposes a drain valve capable of improving the water pressure of the discharged water.

[0004] The present application also proposes a closestool having the above-mentioned drain valve.

[0005] According to the drain valve of the embodiment of the present application, the drain valve comprises:

[0006] a valve body provided with a receiving cavity, a first water inlet, a first water outlet and a first flow channel, the first flow channel being communicated with the receiving cavity, the first water inlet and the first water outlet being respectively communicated with the first flow channel, the first water inlet being used for flowing in external water, and the first water outlet being used for flowing out external water;

[0007] a base fixedly connected with the valve body and provided with a second flow channel and a second water inlet, the second flow channel being used for flowing in water in a water tank, the second water inlet being communicated with the second flow channel, and the opening direction of the second water inlet being arranged along a first direction;

[0008] a driven assembly comprising a driven member, the driven member being located in the receiving cavity and being capable of moving along the first direction under the action of external water;

[0009] a first valve plate comprising a blocking part and a first connecting part connected with each other, the blocking part blocking the second water inlet, and the first connecting part being connected with the driven member;

[0010] an overflow pipe provided with a third flow channel, the third flow channel comprising a first channel segment and a second channel segment communicated with each other, the first channel segment being communicated with the first flow channel, and the second channel segment being communicated with the second flow channel;

[0011] The driven member can drive the first valve plate to move in the first direction away from the base to disengage the blocking portion from the second water inlet.

[0012] According to the water drainage valve, the first flow channel is communicated with the second flow channel through the third flow channel. When the driven assembly is driven, the external water is directly drained to the second flow channel. The water in the toilet water tank and the pressure of the external water source are used to flush the toilet, so as to improve the water pressure when the water flows to flush the toilet and improve the flushing effect of the toilet.

[0013] According to some embodiments of the present application, the valve body comprises an upper valve body and a lower valve body connected with each other, the first flow channel is arranged in the lower valve body, and the upper valve body and the lower valve body jointly define the accommodation cavity; the driven assembly further comprises a first sealing member, the first sealing member can be deformed in the first direction, the first sealing member is clamped between the upper valve body and the lower valve body, and the driven member abuts against one side of the first sealing member away from the base.

[0014] According to some embodiments of the present application, the driven assembly further comprises a clamping member, one side of the driven member towards the first sealing member is further provided with a second connecting portion, the first sealing member is further provided with a through hole, the second connecting portion penetrates through the through hole, the first sealing member is clamped between the clamping member and the driven member, the second connecting portion is fixedly connected with the clamping member, and the driven member and the clamping member seal the through hole.

[0015] According to some embodiments of the present application, an outer edge of the driven member is provided with a first protruding portion, an outer edge of the clamping member is provided with a second protruding portion, one of the first protruding portion and the second protruding portion is provided with a clamping groove, at least a part of the first sealing member is located in the clamping groove, and the first sealing member is clamped between the first protruding portion and the second protruding portion.

[0016] According to some embodiments of the present application, a first elastic member is further included, the first elastic member is connected with the first valve plate, and the first elastic member is used to apply a force on the first valve plate in the first direction close to the base.

[0017] According to some embodiments of the present application, the water drainage valve further comprises a connecting member, the connecting member comprises a third connecting portion and a fourth connecting portion connected with each other, the third connecting portion is located in the accommodation cavity, the third connecting portion is connected with the driven member, the fourth connecting portion extends outside the valve body, and the fourth connecting portion is fixedly connected with the first connecting portion.

[0018] According to some embodiments of the present application, the drain valve further comprises a second elastic member, one end of the second elastic member abutting against the connecting member, and the other end of the second elastic member abutting against the driven member, the second elastic member being configured to apply a force to the driven member in a first direction towards the base.

[0019] According to some embodiments of the present application, the overflow pipe is provided with a second water outlet, the second water outlet being in communication with the second channel segment and the second flow passage; along a direction perpendicular to the extension direction of the third flow passage, a cross-sectional area of the second water outlet is smaller than a cross-sectional area of the third flow passage.

[0020] According to some embodiments of the present application, the drain valve further comprises a nozzle, the nozzle being provided in the second channel segment; the nozzle comprises a first body, a second valve plate and a third elastic member, the first body being provided with a fourth flow passage and a third water inlet, the third water inlet being in communication with the third flow passage and the fourth flow passage, the second valve plate being located in the fourth flow passage, the third elastic member being connected with the second valve plate, the third elastic member being configured to apply a force to the second valve plate in a direction along the extension direction of the fourth flow passage towards the third water inlet, the second valve plate blocking the third water inlet, the second valve plate being capable of moving under the action of external water to unblock the third water inlet.

[0021] According to the toilet of the embodiments of the present application, at least the following beneficial effects are achieved: by applying the drain valve of the embodiments of the present application, the water pressure of the water discharged by the drain valve can be improved, so as to improve the flushing effect of the toilet.

[0022] The drain valve described in the above embodiments;

[0023] The second body is provided with a water tank, a sewage tank and a fifth flow passage, the fifth flow passage being in communication with the water tank and the sewage tank, the drain valve being provided in the water tank, and the second flow passage being in communication with the fifth flow passage.

[0024] According to the toilet of the embodiments of the present application, at least the following beneficial effects are achieved: by applying the drain valve of the embodiments of the present application, the water pressure of the water discharged by the drain valve can be improved, so as to improve the flushing effect of the toilet.

[0025] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0026] The present application will be further described below in conjunction with the drawings and embodiments, in which:

[0027] Figure 1 FIG. 1 is a schematic view of a drain valve according to an embodiment of the present application;

[0028] Figure 2 FIG. 2 is a schematic view of a blocking state of the drain valve according to an embodiment of the present application.

[0029] Figure 3 A schematic view of a water passing state of a drain valve according to an embodiment of the present application;

[0030] Figure 4 A sectional view of a drain valve according to an embodiment of the present application;

[0031] Figure 5 A sectional view of a toilet according to an embodiment of the present application; Figure 2 An enlarged view of a portion a in FIG. 7;

[0032] Figure 6 An exploded view of a driven assembly according to an embodiment of the present application;

[0033] Figure 7 A sectional view of a toilet according to an embodiment of the present application;

[0034] Figure 8 Another sectional view of a toilet according to an embodiment of the present application.

[0035] Reference Signs:

[0036] Drain valve 100;

[0037] Base 200, second flow passage 210, second water inlet 220;

[0038] Valve body 300, upper valve body 310, lower valve body 320, accommodating cavity 330, first flow passage 340, first water inlet 341, first water outlet 342, abutting member 350;

[0039] Driven assembly 400, driven member 410, second connecting portion 411, first protruding portion 412, positioning boss 413, first sealing member 420, through hole 421, clamping member 430, second protruding portion 431, positioning hole 432, clamping groove 440;

[0040] First valve plate 500, blocking portion 510, first connecting portion 520;

[0041] Connecting member 600, third connecting portion 610, fourth connecting portion 620, first elastic member 630, second elastic member 640;

[0042] Overflow pipe 700, third flow passage 710, first passage segment 711, second passage segment 712, second water outlet 720;

[0043] Nozzle 800, first main body 810, fourth flow passage 811, third water inlet 812, second valve plate 820, third elastic member 830;

[0044] Toilet 900, second main body 910, water tank 920, sewage tank 930, fifth flow passage 940. DETAILED DESCRIPTION

[0045] Embodiments of the present application are described below by reference to the accompanying drawings, in which like or similar elements are referred to with like reference numerals throughout the description. The embodiments described below are exemplary in nature and are intended to be illustrative of the present application, but are not to be construed as limiting the present application.

[0046] In the description of the present application, it needs to be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation on the present application.

[0047] In the description of the present application, if the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If it is described as first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of indicated technical features.

[0048] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0049] In the description of the present application, the description of the reference terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In the specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0050] In view of the problem that the drain valve in the related art has insufficient flushing force when applied to a toilet, the present application communicates an external water flow channel with a toilet flushing flow channel, so that the flushed water is jointly acted on by gravity and the pressure of the external water source, thereby improving the water pressure and flow rate of the water discharged by the drain valve and improving the flushing effect when the drain valve is applied to the toilet.

[0051] The drain valve and toilet according to the embodiments of the present application are described below with reference to the accompanying drawings.

[0052] Reference Figures 1 to 3 According to an embodiment of the present invention, a drain valve 100 includes a base 200, a valve body 300, a driven assembly 400, and a first valve plate 500. The valve body 300 is provided with a receiving cavity 330, a first inlet 341, a first outlet 342, and a first flow channel 340. The first flow channel 340 communicates with the receiving cavity 330. The first inlet 341 and the first outlet 342 are respectively connected to the first flow channel 340. The first inlet 341 is used for water to flow into the outside, and the first outlet 342 is used for water to flow out of the outside. The base 200 is fixedly connected to the valve body 300. The base 200 is provided with a second flow channel 210 and a second inlet 220. The second flow channel 210 is used for water to flow into a water tank 920. The second inlet 220 communicates with the second flow channel 210, and the opening direction of the second inlet 220 is arranged along a first direction.

[0053] The driven assembly 400 includes a driven member 410 located within the accommodating cavity 330. The driven member 410 is capable of moving in a first direction under the influence of external water. The first valve plate 500 includes a sealing portion 510 and a first connecting portion 520 connected to each other. The sealing portion 510 seals the second water inlet 220, and the first connecting portion 520 is connected to the driven member 410. The first valve plate 500 is capable of moving in the first direction along the first direction with the movement of the driven member 410 to the sealing portion 510 to release the seal on the second water inlet 220.

[0054] After external water flows into the receiving cavity 330 along the first flow channel 340, the driven member 410 moves in the receiving cavity 330 along the first direction under the push of the external water. The movement of the driven member 410 drives the first valve plate 500 to move along the first direction, thereby causing the sealing part 510 to disengage from the second water inlet 220, thus releasing the seal on the second water inlet 220. Water in the water tank 920 flows in through the second water inlet 220 for flushing. After flushing is completed, the external water is cut off, and the water in the receiving cavity 330 flows out from the first water outlet 342. The driven member 410, no longer under the force of the water, resets, and the sealing part 510 follows the driven member 410 to reset to the second water inlet 220 to seal the second water inlet 220.

[0055] The overflow pipe 700 is provided with a third flow channel 710, which includes a first channel section 711 and a second channel section 712 that are interconnected. The first channel section 711 is connected to the first flow channel 340, and the second channel section 712 is connected to the second flow channel 210. By connecting the first flow channel 340 and the second flow channel 210 through the third flow channel 710, the external water drives the driven component 400, and the discharged water flows directly into the second flow channel 210. The gravity of the water in the toilet tank 920 and the pressure of the external water source are used together to flush the toilet 900, thereby increasing the water pressure when flushing the toilet 900 and improving the flushing effect of the toilet 900.

[0056] Compared with the related art, the water tank 920 of the present application does not need to be provided with electronic elements and metal traction structures to achieve the opening and closing of the drain valve 100, avoiding the erosion of water vapor on electronic elements, and enabling normal use of the drain valve 100 in the case of power failure. On the other hand, the first valve plate 500 is driven to move by external water, which is equivalent to using a force field to drive the first valve plate 500. Compared with using a simple mechanical structure to drive the movement of the first valve plate 500, the wear between components is smaller, and the service life of the drain valve 100 can be further prolonged. Moreover, the first flow channel 340 and the second flow channel 210 are connected by the overflow pipe 700, thereby prolonging the service life of the drain valve 100 while improving the water pressure of the water discharged by the drain valve 100 to improve the flushing effect of the toilet 900.

[0057] It can be understood that the first direction refers to the same direction as the opening direction of the second water inlet 220 and the movement direction of the driven assembly 400. The first direction can be the same as the direction of gravity, so as to reset by using the gravity of the driven assembly 400 and the first valve plate 500. When the external water stops flowing into the first water inlet 341, the external water will gradually flow out of the second water outlet 720. After the driven member 410 loses the effect of the external water, it will reset under the action of gravity, and the first valve plate 500 resets the sealing part 510 under the action of its own gravity and the gravity of the driven member 410.

[0058] Specifically, in order to ensure that the external water can have enough pressure to drive the driven assembly 400 to move, the size of the first water outlet 342 can be controlled so that the first water outlet 342 is smaller than the first water inlet 341, thereby limiting the outflow of the external water in the accommodation cavity 330 and pressurizing. Alternatively, a flow limiting valve or a flow limiting nozzle can be provided at the first water outlet 342 to limit the outflow of the external water in the accommodation cavity 330 and pressurize. The above-mentioned setting of the first water outlet 342 and the use of the flow limiting valve can also be adaptively changed to the extension pipe communicating with the first water outlet 342.

[0059] The valve body 300 comprises an upper valve body 310 and a lower valve body 320 connected to each other, the first flow channel 340 is arranged in the lower valve body 320, and the upper valve body 310 and the lower valve body 320 jointly define a containing cavity 330. The base 200 and the valve body 300 are fixedly connected through clamping or pre-tightening of a pre-tightening member such as a bolt, wherein the bolt can be selected as a conventional bolt or a rust-proof bolt. Although the conventional bolt is also subject to water vapor corrosion, the bolt only plays a fastening role and does not need to move, and there is no possibility of movement jamming due to rust. Even if the bolt is rusted, the effect on the realization and effect of fastening is small and can be ignored. The same applies to the application of bolts and other pre-tightening members at other connection positions. The first water inlet 341 and the first water outlet 342 are arranged at opposite ends of the valve body 300, respectively, and the driven member 410 is arranged between the first water inlet 341 and the first water outlet 342, so as to improve the effect of the external water force that the driven member 410 can receive. The first water outlet 342 can be in communication with the water tank 920 of the toilet 900, so that after the external water realizes the driving function, it can flow into the water tank 920 as water for flushing the toilet 900.

[0060] Further, referring to Figure 2 and Figure 3 , the axis of the first channel segment 711 coincides with the axis of the first flow channel 340, so as to improve the flow rate and water pressure of the external water flowing out of the overflow pipe 700.

[0061] Specifically, the fluid has viscosity, and there is a pressure loss along the way when the fluid flows in the pipeline. The pipe wall is static, and if the external water infiltrates the pipe wall of the second flow channel 210, the flow rate and the pipe wall speed are both zero, and the pressure loss along the way is large. With the increase of the distance between the external water and the pipe wall of the second flow channel 210, the pressure loss along the way gradually decreases, and the speed of the external water becomes larger and larger, and reaches the maximum at the center position of the base 200. When the speed of the external water is maximum, the axis of the first channel segment 711 coincides with the axis of the first flow channel 340.

[0062] As an improvement of the above scheme, referring to Figures 2 to 6The driven assembly 400 further comprises a first sealing member 420 capable of deforming in the first direction, the first sealing member 420 being clamped between the upper valve body 310 and the lower valve body 320, and the driven member 410 abutting against a side of the first sealing member 420 away from the base 200. By arranging the first sealing member 420, external water can be confined in the accommodating cavity 330 and located between the driven member 410 and the base 200, so as to ensure that when the driven member 410 is affected by external water, the force is in the first direction away from the base 200, avoiding the external water from leaking to the side of the driven member 410 away from the base 200 and affecting the movement of the driven member 410, and the first sealing member 420 can also reduce the possibility of external water leaking out of the valve body 300 along the gap of the valve body 300 or along the relief structure, ensuring that external water flows into the first water inlet 341 and flows out of the second water inlet 220.

[0063] Specifically, the first sealing member 420 is annular, and the outer edge of the first sealing member 420 is clamped between the upper valve body 310 and the lower valve body 320 to ensure the sealing effect. When external water flows into the accommodating cavity 330, the external water abuts against the side of the first sealing member 420 towards the base 200 and causes the first sealing member 420 to deform in the direction away from the base 200, and the driven member 410 moves in the direction away from the base 200 under the abutment of the first sealing member 420. When the external water is discharged from the accommodating cavity 330, the first sealing member 420 restores to the original state in the direction towards the base 200 under the weight and gravity of the driven member 410, completing the reset of the drain valve 100.

[0064] Further, referring to Figure 5 and Figure 6 The driven assembly 400 further comprises a clamping member 430, the side of the driven member 410 towards the first sealing member 420 is further provided with a second connecting portion 411, the first sealing member 420 is further provided with a through hole 421, the second connecting portion 411 is arranged through the through hole 421, and the first sealing member 420 is clamped between the clamping member 430 and the driven member 410. The driven member 410 is fixedly connected with the clamping member 430, and the driven member 410 and the clamping member 430 seal the through hole 421. By clamping the first sealing member 420 by the clamping member 430 and the driven member 410, the stability of the driven member 410 when driven by the first sealing member 420 can be improved, and the possibility of movement deviation of the driven member 410 due to irregular deformation of the first sealing member 420 can be reduced. The fixed connection between the driven member 410 and the clamping member 430 can be achieved by ultrasonic welding or pre-tightening of a pre-tightening member, as long as the sealing degree of the through hole 421 is ensured.

[0065] Specifically, the second connecting part 411 can be provided with a positioning boss 413, the clamping part 430 can be provided with a positioning hole 432, the positioning boss 413 is inserted into the positioning hole 432, and the positioning boss 413 and the positioning hole 432 can facilitate positioning between the clamping part 430 and the driven part 410, thereby improving assembly efficiency.

[0066] As a further improvement of the above-mentioned solution, with reference to Figure 5 and Figure 6 The outer edge of the driven part 410 is provided with a first protruding part 412, the outer edge of the clamping part 430 is provided with a second protruding part 431, one of the first protruding part 412 and the second protruding part 431 is provided with a clamping groove 440, at least a part of the first sealing part 420 is located in the clamping groove 440, and the first sealing part 420 is clamped between the first protruding part 412 and the second protruding part 431. By clamping the first sealing part 420 through the first protruding part 412 and the second protruding part 431, the sealing degree of the driven assembly 400 can be further improved, and the possibility of external water leakage can be reduced.

[0067] As another aspect of the improvement of the above-mentioned solution, with reference to Figures 2 to 4 The driven assembly 400 further comprises a first elastic part 630, the first elastic part 630 is connected with the first valve plate 500, and the first elastic part 630 is used to apply a force in the first direction to the first valve plate 500 to approach the base 200. By providing the first elastic part 630, the first valve plate 500 and the driven part 410 can be assisted to reset, and the possibility that the driven part 410 and the first valve plate 500 cannot reset after being lifted can be reduced.

[0068] Specifically, the first elastic part 630 can be selected as a compression type elastic part such as a spring, one end of the first elastic part 630 abuts against the abutting part 350 fixed on the side of the upper valve body 310 away from the base 200, the other end of the first elastic part 630 abuts against the driven assembly 400, so as to apply a force in the first direction to the driven assembly 400 to approach the base 200, and the driven assembly 400 applies a force in the first direction to the first valve plate 500 to approach the base 200. In other embodiments, one end of the first elastic part 630 abuts against the lower valve body 320, and the other end of the first elastic part 630 abuts against the plugging part 510, so as to apply a force in the first direction to the first valve plate 500 to approach the base 200. Alternatively, in other embodiments, the first elastic part 630 can also be selected as a tensile type elastic part such as an elastic band, the first elastic part 630 is sleeved on the driven assembly 400 and the base 200, and the inner ring of the first elastic part 630 abuts against the driven assembly 400 and the base 200 respectively, so as to apply a force in the first direction to the first valve plate 500 to approach the base 200.

[0069] In some embodiments, the follower 410 is directly connected with the first connecting part 520, a part of the follower 410 is located in the accommodating cavity 330, and another part of the follower 410 extends outside the valve body 300 and is fixedly connected with the first connecting part 520. Alternatively, a part of the first connecting part 520 extends into the inside of the valve body 300 and is fixedly connected with the follower 410. The first connecting part 520 and the follower 410 can be fixedly connected by clamping or pre-tightening.

[0070] Further, referring to Figures 2 to 4 , the drain valve 100 further comprises a connecting piece 600, the connecting piece 600 comprises a third connecting part 610 and a fourth connecting part 620 connected with each other, the third connecting part 610 is located in the accommodating cavity 330, the third connecting part 610 is connected with the follower 410, and the third connecting part 610 can be fixedly connected with the follower 410 or abut against the follower 410. The fourth connecting part 620 extends outside the valve body 300 and is fixedly connected with the first connecting part 520. The connecting piece 600 is used to connect the follower 410 and the first connecting part 520, which can simplify the mechanism of the follower 410 and the first valve plate 500 and facilitate the assembly of the follower 410 and the first connecting part 520.

[0071] Specifically, in the embodiment provided with the connecting piece 600, the first elastic piece 630 can be arranged to abut against one end of the fourth connecting part 620 and the other end of the abutting piece 350.

[0072] Referring to Figure 4 , as an improvement of the above-mentioned scheme, the drain valve 100 further comprises a second elastic piece 640, one end of the second elastic piece 640 abuts against the connecting piece 600, and the other end of the second elastic piece 640 abuts against the follower 410. The second elastic piece 640 is used to apply a force in the first direction to the follower 410 to approach the base 200, to assist the follower 410 to reset and to buffer through the second elastic piece 640, to reduce the rigid impact between the follower 410 and the connecting piece 600. The second elastic piece 640 can also adjust the force of the water pressure required by the follower 410 to move.

[0073] The second elastic member 640 can be selected as a spring or a bellows or other elastic member conventional in the art. The third connecting portion 610 is in sliding connection with the fourth connecting portion 620, and the third connecting portion 610 and the fourth connecting portion 620 can move relative to each other in the first direction. One end of the second elastic member 640 abuts against the driven member 410, and the other end of the second elastic member 640 abuts against the fourth connecting portion 620. In other embodiments, one end of the second elastic member 640 abuts against the driven member 410, and the other end of the second elastic member 640 abuts against the third connecting portion 610. It can be understood that the number of second elastic members 640 is not limited, and can be one or more. Uniform arrangement of multiple second elastic members 640 can make the movement of the drain valve 100 more stable, and the specific number of second elastic members 640 is determined according to specific needs.

[0074] According to some embodiments of the present application, the overflow pipe 700 is provided with a second water outlet 720, which communicates the second channel segment 712 with the second flow channel 210. The cross-sectional area of the second water outlet 720 is smaller than the cross-sectional area of the third flow channel 710 in a direction perpendicular to the extension direction of the third flow channel 710. By limiting the cross-sectional area of the second water outlet 720 and the cross-sectional area of the third flow channel 710, the outflow of external water in the accommodation cavity 330 can be limited and pressurized, and it is ensured that the external water has sufficient water pressure to drive the driven assembly 400 to move after entering the accommodation cavity 330,

[0075] As a further improvement of the above-mentioned scheme, with reference to Figures 2 to 4 The drain valve 100 further comprises a nozzle 800, which comprises a first body 810, a second valve plate 820, and a third elastic member 830. The first body 810 is provided with a fourth flow channel 811 and a third water inlet 812. The third water inlet 812 communicates the third flow channel 710 with the fourth flow channel 811. The second valve plate 820 is located in the fourth flow channel 811. The third elastic member 830 is connected with the second valve plate 820, and is used to apply a force to the second valve plate 820 in the extension direction of the fourth flow channel 811 to approach the third water inlet 812. The second valve plate 820 blocks the third water inlet 812, and can move under the action of external water to unblock the third water inlet 812. By blocking the third water inlet 812 through cooperation of the second valve plate 820 and the third elastic member 830, external water can continuously accumulate in the accommodation cavity 330 when the water pressure is not lifted to a set water pressure, and can be pushed away from the second valve plate 820 and flow out from the fourth flow channel 811 only when the set water pressure is reached, so as to ensure that the driven assembly 400 can move to a set position to lift the first valve plate 500, and improve the use stability of the drain valve 100.

[0076] Specifically, the third elastic member 830 can be selected as a compression type elastic member such as a spring, one end of the third elastic member 830 abuts against the side of the second valve plate 820 away from the third water inlet 812, and the other end of the third elastic member 830 abuts against the inner surface of the first main body 810, so as to exert a force on the second valve plate 820 along the extension direction of the fourth flow channel 811 to make the second valve plate 820 close to the third water inlet 812.

[0077] It can be understood that the nozzle 800 in the embodiment is the flow limiting nozzle mentioned above, and the nozzle 800 can also be directly installed in the first water outlet 342 or an extension pipeline thereof.

[0078] With reference to Figure 7 and Figure 8 , the application further provides a toilet 900 comprising a second main body 910 and the drain valve 100 in the above embodiment. The second main body 910 is provided with a water tank 920, a sewage tank 930 and a fifth flow channel 940, the fifth flow channel 940 communicates the water tank 920 and the sewage tank 930, the drain valve 100 is arranged in the water tank 920, and the second flow channel 210 communicates with the fifth flow channel 940. By applying the drain valve 100 in the embodiment of the application, the service life of the drain valve 100 can be prolonged, so as to prolong the maintenance cycle and the overall service life of the toilet 900, and the water pressure of the water discharged by the drain valve 100 can be improved, so as to improve the flushing effect of the toilet 900.

[0079] Specifically, with reference to Figure 7 , the lower side of the base 200 is inserted into the fifth flow channel 940, and the base 200 is fixed to the inner surface of the water tank 920, so that the installation of the drain valve 100 is completed. The size of the lower side of the base 200 can be set to adapt to the general size of the fifth flow channel 940, so as to improve the applicability of the drain valve 100 and adapt to most of the toilets in the related field.

[0080] The flow direction of the water in the water tank 920 and the flow direction of the water in the Figure 7 and Figure 8 are shown by arrows, and the flow direction of the water in the sewage tank 930 is shown by an arrow in Figure 8 . The sewage tank 930 and the sewer have a flow channel for communication, which is a common knowledge in the art and will not be described in detail here.

[0081] The embodiments of the application are described in detail above with reference to the drawings, but the application is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the application. In addition, the embodiments of the application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A drain valve for a toilet, characterized by, The utility model relates to a valve body, a base, a driven assembly, a first valve plate, an overflow pipe and a first elastic member, and the valve body is provided with a containing cavity, a first water inlet, a first water outlet and a first flow channel, the first flow channel is communicated with the containing cavity, the first water inlet and the first water outlet are communicated with the first flow channel respectively, the first water inlet is used for flowing into the water of outside, and the first water outlet is used for flowing out the water of outside. The base is fixedly connected with the valve body and is provided with a second flow channel and a second water inlet, the second flow channel is used for flowing into the water tank, the second water inlet is communicated with the second flow channel, and the opening direction of the second water inlet is arranged along the first direction. The driven assembly includes a driven part, the driven part is located in the containing cavity, and the driven part can move along the first direction under the action of the water of outside. The first valve plate includes a blocking part and a first connecting part which are connected with each other, the blocking part blocks the second water inlet, and the first connecting part is connected with the driven part. The overflow pipe is provided with a third flow channel, the third flow channel includes a first channel segment and a second channel segment which are communicated with each other, the first channel segment is communicated with the first flow channel, and the second channel segment is communicated with the second flow channel. The driven part can drive the first valve plate to move in the first direction away from the base to the blocking part to separate from the second water inlet, the valve body includes an upper valve body and a lower valve body which are connected with each other, the first flow channel is arranged in the lower valve body, and the upper valve body and the lower valve body jointly define the containing cavity. The driven assembly further includes a first sealing part, the first sealing part can be deformed along the first direction, the first sealing part is clamped between the upper valve body and the lower valve body, and the driven part abuts against one side of the first sealing part away from the base.

2. The drain valve of claim 1, wherein, The driven assembly further includes a clamping part, one side of the driven part towards the first sealing part is further provided with a second connecting part, the first sealing part is further provided with a through hole, the second connecting part is arranged in the through hole, the first sealing part is clamped between the clamping part and the driven part, the second connecting part is fixedly connected with the clamping part, and the driven part and the clamping part seal the through hole.

3. The drain valve of claim 2, wherein, The outer edge of the driven part is provided with a first protruding part, the outer edge of the clamping part is provided with a second protruding part, one of the first protruding part and the second protruding part is provided with a clamping groove, at least a part of the first sealing part is located in the clamping groove, and the first sealing part is clamped between the first protruding part and the second protruding part.

4. The drain valve of claim 3, wherein, The utility model further includes a first elastic member, the first elastic member is connected with the first valve plate, and the first elastic member is used for applying force on the first valve plate to the base along the first direction.

5. The drain valve of claim 1, wherein, The utility model further includes a connecting part, the connecting part includes a third connecting part and a fourth connecting part which are connected with each other, the third connecting part is located in the containing cavity, the third connecting part is connected with the driven part, the fourth connecting part is arranged outside the valve body, and the fourth connecting part is fixedly connected with the first connecting part.

6. The drain valve according to any one of claims 1 to 5, characterized in that ​ 7. The drain valve of claim 6, wherein, A second elastic member is further included, one end of the second elastic member abutting against the connecting member, and the other end of the second elastic member abutting against the driven member, the second elastic member being configured to apply a force to the driven member in a first direction towards the base.

8. The drain valve of claim 1, wherein, The overflow pipe is provided with a second water outlet, the second water outlet being in communication with the second channel segment and the second flow passage; along a direction perpendicular to an extension direction of the third flow passage, a cross-sectional area of the second water outlet is smaller than a cross-sectional area of the third flow passage.

9. The drain valve of claim 1, wherein, A nozzle is further included, the nozzle being arranged in the second channel segment; the nozzle includes a first body, a second valve plate and a third elastic member, the first body being provided with a fourth flow passage and a third water inlet, the third water inlet being in communication with the fourth flow passage and the third flow passage, the second valve plate being located in the fourth flow passage, the third elastic member being connected with the second valve plate, the third elastic member being configured to apply a force to the second valve plate along an extension direction of the fourth flow passage towards the third water inlet, the second valve plate blocking the third water inlet, the second valve plate being capable of moving under the action of external water to unblock the third water inlet.

10. A toilet characterized by The water valve comprises: The water valve according to any one of claims 1 to 9; The second body is provided with a water tank, a sewage tank and a fifth flow passage, the fifth flow passage being in communication with the water tank and the sewage tank, the water valve being arranged in the water tank, and the second flow passage being in communication with the fifth flow passage.

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