Check valve, flushing component and toilet

Abstract

The present invention discloses a check valve, a flushing assembly and a toilet. The check valve includes a valve seat, a return spring, a valve core and a first sealing ring. The valve seat includes a first installation pipe and a second installation pipe which are sleeved with each other. The outer wall of the first installation pipe is connected to the inner wall of the second installation pipe, and a drainage channel is formed between the first installation pipe and the second installation pipe. One end of the return spring is sleeved outside the first installation pipe and abuts against the inner wall of the second installation pipe. The valve core includes a shaft body and a stop body. One end of the shaft body penetrates into the first installation pipe, and the other end of the shaft body passes through the return spring and is connected to the stop body. The other end of the return spring abuts against the stop body, and the periphery of the stop body is spaced from the inner wall surface of the second installation pipe. The first sealing ring is installed between the inner wall of the second installation pipe and the periphery of the stop body. Through the above solution, the stability of the valve core can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sanitary wares, and particularly relates to a check valve, a flushing assembly and a toilet. Background Art

[0002] Existing toilets generally are provided with two sets of flushing pipelines, namely a wash ring pipeline and a main flushing pipeline. Among them, the pipe orifice of the main flushing pipeline is lower than the water level in the toilet, so that sewage can enter the main flushing pipeline. In order to prevent sewage backflow caused by air pressure change in the pipeline, a check valve is also provided in the main flushing pipeline, and the liquid in the main flushing pipeline can only pass through the check valve unidirectionally.

[0003] However, during the unidirectional liquid passing process of the existing check valve, the valve core is not stable enough in the open state, and is prone to vibration under the impact of the liquid, wear with the valve seat, and generate abnormal noises. Summary of the Invention

[0004] The main object of the present invention is to provide a check valve, aiming to improve the stability of the valve core of the check valve.

[0005] To achieve the above object, a check valve proposed by the present invention is applied to the flushing assembly of a toilet. The check valve includes:

[0006] A valve seat, including a first installation pipe and a second installation pipe sleeved with each other. The outer wall of the first installation pipe is connected to the inner wall of the second installation pipe, and a drainage channel is formed between the first installation pipe and the second installation pipe;

[0007] A return spring, one end of which is sleeved outside the first installation pipe and abuts against the inner wall of the second installation pipe;

[0008] A valve core, including a shaft body and a stop body. One end of the shaft body penetrates into the first installation pipe, the other end of the shaft body passes through the return spring and is connected to the stop body, the other end of the return spring abuts against the stop body, and a peripheral edge of the stop body is spaced from the inner wall surface of the second installation pipe; and

[0009] A first sealing ring, installed between the inner wall of the second installation pipe and the peripheral edge of the stop body. In some embodiments of the present invention, the check valve further includes a mounting ring. A clamping protrusion is provided on an end face of the second installation pipe facing the mounting ring, a clamping groove is correspondingly provided on the first sealing ring, the clamping protrusion is clamped into the clamping groove, the mounting ring is fixed to one end of the second installation pipe and presses the first sealing ring, and one groove wall of the clamping groove is arranged between the inner wall of the second installation pipe and the peripheral edge of the stop body.

[0010] In some embodiments of the present invention, in the closed state of the check valve, the ratio of the axial length of the first mounting pipe to the length of the shaft body is 1 / 3 to 2 / 3.

[0011] In some embodiments of the present invention, a plurality of connecting ribs arranged at intervals are convexly provided on the inner wall of the second mounting pipe. The connecting ribs are connected to the outer wall of the first mounting pipe, and one end of the return spring away from the stopper abuts against the connecting ribs.

[0012] In some embodiments of the present invention, the surface of the stopper facing away from the shaft body is provided with an umbrella-shaped flow guiding slope, and the periphery of the flow guiding slope abuts against the first sealing ring.

[0013] In some embodiments of the present invention, an annular groove is recessed on the surface of the stopper facing the shaft body, and one end of the return spring abuts against the bottom wall of the annular groove.

[0014] The present invention also provides a flushing assembly, including a liquid storage tank, a water pump, a switching valve, an upper flushing pipe, a main flushing pipe, and the check valve; wherein,

[0015] A liquid storage cavity is provided in the liquid storage tank;

[0016] The water pump is located outside the liquid storage tank and is arranged close to the bottom wall of the liquid storage tank. The water pump communicates with the bottom of the liquid storage cavity;

[0017] The switching valve is provided with a water inlet pipe joint, an upper flushing pipe joint, and a main flushing pipe joint. The water inlet pipe joint communicates with the water pump, the upper flushing pipe joint communicates with the upper flushing pipe, and the main flushing pipe joint communicates with the main flushing pipe;

[0018] The check valve is installed on the main flushing pipe joint to prevent sewage from flowing back from the main flushing pipe to the switching valve.

[0019] In some embodiments of the present invention, the flushing assembly further includes a bracket. An installation platform is formed on one side of the liquid storage tank. A limiting chute is provided on the bottom surface of the installation platform. A limiting rib plate is provided on the top of the bracket. The limiting rib plate is slidably fitted in the limiting chute, and the water pump is installed at the bottom end of the bracket.

[0020] In some embodiments of the present invention, the flushing assembly further includes a vacuum breaker. The vacuum breaker is provided on the top of the liquid storage tank and communicates between the water pump and the water inlet pipe joint.

[0021] In some embodiments of the present invention, the flushing assembly further includes a cylindrical filter screen and a water delivery pipe. The cylindrical filter screen is disposed at the bottom of the liquid storage cavity. One end of the cylindrical filter screen is rotatably fastened to one end of the water delivery pipe, and the other end of the water delivery pipe is communicated with the water pumping end of the water pump.

[0022] The present invention also provides a toilet, including a housing and the flushing assembly; the housing is provided with an assembly cavity, a wash ring water outlet, and a main flushing water outlet. The flushing assembly is assembled in the assembly cavity. The upper flushing pipe is communicated with the wash ring water outlet, and the main flushing pipe is communicated with the main flushing water outlet.

[0023] When the check valve in the present invention is passing water, the shaft body of the valve core slides in the first installation pipe, and the cooperation structure between the shaft body and the first installation pipe is relatively stable. When the liquid flow rate in the check valve is greater, the compression amount of the return spring is greater, and the distance between the stop body and the first installation pipe is closer. The first installation pipe can form a more stable support for the valve core, and the valve core is not easy to vibrate, thereby avoiding the vibration and wear between the valve core and the valve seat.

[0024] When the toilet in the present invention is flushing, the water pump works to pump out the water in the liquid storage tank and pressurize and transport it to the switching valve. The switching valve discharges the water along the upper flushing pipe joint and the main flushing pipe joint. The combination of the two flushing methods has a high flushing cleanliness and is more water-saving; and, since the main flushing pipe joint is provided with a check valve, after the flushing is completed, the check valve can effectively prevent the dirty water from flowing back from the main flushing pipeline to the switching valve, ensuring that the water in the flushing assembly is not polluted by the dirty water. In addition, after the water pump stops, the water pressure in the switching valve is too small to push open the check valve, so a certain amount of water will be left, thereby avoiding the adverse phenomena of generating a blasting sound or bubbles emerging from the main flushing pipe during the next flushing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0026] Figure 1 It is a schematic structural diagram of an embodiment of the toilet of the present invention;

[0027] Figure 2 It is a schematic structural diagram of an embodiment of the flushing assembly of the present invention;

[0028] Figure 3 It is an exploded view of an embodiment of the flushing assembly of the present invention;

[0029] Figure 4Schematic diagram of the structure of a check valve according to an embodiment of the present invention;

[0030] Figure 5 Exploded view of a check valve according to an embodiment of the present invention;

[0031] Figure 6 Cross-sectional view of a check valve according to an embodiment of the present invention;

[0032] Figure 7 For Figure 6 Enlarged view of part A in

[0033] Figure 8 Exploded view of the vacuum breaker in the flushing assembly of the present invention;

[0034] Figure 9 Cross-sectional view of the vacuum breaker in the flushing assembly of the present invention;

[0035] Figure 10 Schematic diagram of the structure of the flushing assembly of the present invention from another perspective;

[0036] Figure 11 For Figure 10 Enlarged view of part B in

[0037] Figure 12 Cross-sectional view of the toilet of the present invention;

[0038] Figure 13 Schematic diagram of the structure of the outer shell in the toilet of the present invention.

[0039] Explanation of the reference numerals in the drawings:

[0040]

[0041]

[0042] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0044] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture (as shown in the attached drawings). If the specific posture changes, the directional indications will also change accordingly.

[0045] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0046] Please refer to Figures 1 to 5 , a check valve 100 proposed by the present invention is applied to the flushing assembly 1000 of a toilet 2000 and is installed on the main flushing pipe joint 430 of the switching valve 400 in the flushing assembly 1000, and is used to prevent sewage from flowing back into the flushing assembly 1000 of the toilet 2000. The check valve 100 includes a valve seat 110, a return spring 120, a valve core 130, and a first sealing ring 140.

[0047] The valve seat 110 includes a first installation pipe 111 and a second installation pipe 112 sleeved with each other. The outer wall of the first installation pipe 111 is connected to the inner wall of the second installation pipe 112, and a drainage channel 115 is formed between the first installation pipe 111 and the second installation pipe 112; generally, both the first installation pipe 111 and the second installation pipe 112 are set as circular pipes, and the first installation pipe 111 and the second installation pipe 112 can be made of metal or plastic; there are various specific connection methods between the two. For example, one end of the first installation pipe 111 and the second installation pipe 112 is provided with an annular plate. The outer ring of the annular plate is connected to the second installation pipe 112, and the inner ring of the annular plate is connected to the first installation pipe 111. The first installation pipe 111, the second installation pipe 112, and the annular plate are integrally formed, and the annular plate is provided with a drainage channel 115; another example is that the side wall of the second installation pipe 112 is convexly provided with an internal thread cylinder, the side wall of the first installation pipe 111 is penetrated with an assembly hole, and a screw connection member is threadedly connected in the internal thread cylinder and passes through the assembly hole; there are many connection methods between the first installation pipe 111 and the second installation pipe 112, and no specific limitation is made on the two here.

[0048] One end of the return spring 120 is sleeved outside the first installation pipe 111 and abuts against the inner wall of the second installation pipe 112; the valve core 130 includes a shaft body 131 and a stop body 132. One end of the shaft body 131 penetrates into the first installation pipe 111, and the other end of the shaft body 131 passes through the return spring 120 and is connected to the stop body 132. The other end of the return spring 120 abuts against the stop body 132, and the periphery of the stop body 132 is spaced from the inner wall surface of the second installation pipe 112; the first sealing ring 140 is installed between the inner wall of the second installation pipe 112 and the periphery of the stop body 132.

[0049] The shaft body 131 and the stop body 132 are generally integrally formed, so that the structural strength is relatively high, the number of parts is reduced, and the assembly is convenient. Of course, the shaft body 131 and the stop body 132 can also be connected by threads, snap connection, welding, hot melt fixing, etc., and no specific limitation is made here.

[0050] The shaft body 131 is in sliding fit with the first installation pipe 111, and the gap between the two is generally set to be 0.03 mm to 0.5 mm. On the one hand, it ensures the smoothness of the sliding of the shaft body 131, and on the other hand, it ensures the stability of the shaft body 131 when it is impacted by water flow.

[0051] The return spring 120 abuts against the valve core 130 so that the valve core 130 has a tendency to close. When water is passed into the check valve 100 in the forward direction, the valve core 130 is impacted by the water and abuts against the return spring 120. The return spring 120 is compressed, and a gap is generated between the stop body 132 and the first sealing ring 140. The water passes through the gap between the valve core 130 and the first sealing ring 140 and flows out from the drainage channel 115. When the forward water flow ends, the check valve 100 is reset under the abutting action of the return spring 120. At this time, the valve core 130 is subjected to two opposite forces in the axial direction of the shaft body 131, namely the abutting force of the spring and the abutting force of the first sealing ring 140. If there is liquid flowing reversely into the drainage channel 115, the abutting force between the valve core 130 and the first sealing ring 140 is greater under the impact of the liquid, and the sealing effect is better, thereby realizing check.

[0052] When the check valve 100 in the present invention passes water, the shaft body 131 of the valve core 130 slides in the first installation pipe 111, and the matching structure between the shaft body 131 and the first installation pipe 111 is relatively stable. When the liquid flow rate in the check valve 100 is greater, the compression amount of the return spring 120 is greater, the distance between the stop body 132 and the first installation pipe 111 is closer, and the first installation pipe 111 can form a more stable support for the valve core 130, and the valve core 130 is not easy to vibrate, thereby avoiding the vibration wear between the valve core 130 and the valve seat 110.

[0053] Please refer to Figures 5 to 7, in some embodiments of the present invention, the check valve 100 further includes a mounting ring 150. A clamping protrusion 113 is provided on the end face of the second mounting pipe 112 facing the mounting ring 150. A clamping groove 141 is correspondingly provided on the first sealing ring 140. The clamping protrusion 113 is snapped into the clamping groove 141. The mounting ring 150 is fixed to one end of the second mounting pipe 112 and presses against the first sealing ring 140. One groove wall of the clamping groove 141 is provided between the inner wall of the second mounting pipe 112 and the periphery of the stopper 132.

[0054] In the above solution, the first sealing ring 140 is clamped and fixed between the second mounting pipe 112 and the mounting ring 150, ensuring the sealing performance between the second mounting pipe 112 and the first sealing ring 140, and between the mounting ring 150 and the first sealing ring 140. Moreover, by snapping the clamping protrusion 113 into the clamping groove 141 to limit the radial relative movement between the first sealing ring 140 and the second mounting pipe 112, the structural stability is better. In addition, the groove wall of the clamping groove 141 of the first sealing ring 140 is provided between the inner wall of the second mounting pipe 112 and the periphery of the stopper 132. When the stopper 132 abuts against the first sealing ring 140, the groove wall of the clamping groove 141 of the first sealing ring 140 is clamped by the stopper 132 and the inner wall of the second mounting pipe 112, and the check valve effect is better.

[0055] There are various ways to fix the mounting ring 150 to the second mounting pipe 112. For example, a thread is provided on the outer periphery of the end of the second mounting pipe 112 close to the mounting ring 150, and a corresponding thread is provided on the inner periphery of the mounting ring 150, and the two are threadedly connected. In some embodiments of the present invention, an assembly protrusion 116 is provided on the outer periphery of the end of the second mounting pipe 112 close to the mounting ring 150, and a corresponding assembly groove 152 is provided on the inner periphery of the mounting ring 150. The assembly protrusion 116 is assembled into the assembly groove 152, which is convenient for assembly. There are many other ways to fix the mounting ring 150 to the second mounting pipe 112, and they will not be listed one by one here.

[0056] Considering that when the overlapping part of the first mounting pipe 111 and the shaft body 131 is small, the support stability of the first mounting pipe 111 for the shaft body 131 is poor, and when the overlapping part of the first mounting pipe 111 and the shaft body 131 is large, the first mounting pipe 111 will limit the movement range of the valve core 130, affecting the water flow smoothness of the check valve 100. In some embodiments of the present invention, in the closed state of the check valve 100, the ratio of the axial length of the first mounting pipe 111 to the length of the shaft body 131 is 1 / 3 to 2 / 3. The ratio can be specifically 1 / 3, 1 / 2, 2 / 3, etc. Such a setting can take into account the water flow smoothness of the check valve 100 and the stability of the valve core 130, and avoid the above problems.

[0057] When the check valve 100 allows water to flow in the forward direction, the water flow will impact the connection structure between the first installation pipe 111 and the second installation pipe 112. When the instantaneous impact force is relatively large, it may damage the connection structure. Therefore, in some embodiments of the present invention, a plurality of connecting ribs 114 arranged at intervals are convexly provided on the inner wall of the second installation pipe 112. The connecting ribs 114 are connected to the outer wall of the first installation pipe 111, and one end of the return spring 120 away from the stopper 132 abuts against the connecting ribs 114. With such a setting, when the water flow passes through the drainage channel 115, the impact surface area with the connecting ribs 114 is relatively small, and the impact force is relatively small. On the one hand, it can avoid the structure being damaged by the water flow impact. On the other hand, the cross-sectional area of the drainage channel 115 is larger, which is convenient for the water flow to drain smoothly.

[0058] In order to further improve the drainage smoothness, in some embodiments of the present invention, the surface of the stopper 132 facing away from the shaft body 131 is provided with an umbrella-shaped diversion inclined surface 1321, and the periphery of the diversion inclined surface 1321 abuts against the first sealing ring 140. In this way, when the check valve 100 allows water to flow through, the water flow flows into the gap between the stopper and the second installation pipe 112 along the diversion inclined surface 1321, and then is discharged through the drainage channel 115, with good smoothness.

[0059] In some embodiments of the present invention, the inner side of the port at one end of the mounting ring 150 away from the second installation pipe 112 is provided with an arc surface. With such a setting, the water flowing into the check valve 100 in the forward direction flows down along the arc surface, and the impact force of the water flow on the end surface of the mounting ring 150 is relatively small, which can avoid the mounting ring 150 being loosened from the connected pipeline due to the impact of the water flow.

[0060] Considering that the distance between the end of the return spring 120 close to the stopper 132 and the shaft body 131 is relatively large to allow the first installation pipe 111 to extend in, but it is easy for the end of the return spring 120 close to the stopper 132 to be displaced. When the valve core 130 is pressed, the return spring 120 is squeezed between the stopper 132 and the end surface of the first installation pipe 111, causing damage and deformation to the return spring 120. It will also cause the return spring 120 to form a radial acting force on the valve core 130, resulting in a relatively large friction force on one side between the valve core 130 and the first installation pipe 111 during axial sliding, leading to wear and abnormal noise. It may also cause the stopper portion to be displaced, resulting in a gap between the stopper portion and the first sealing ring 140, affecting the sealing performance.

[0061] To solve the above problems, in some embodiments of the present invention, an annular groove 1322 is recessed on the surface of the stopper 132 facing the shaft body 131, and one end of the return spring 120 abuts against the bottom wall of the annular groove 1322. With such a setting, one end of the return spring 120 is limited within the annular groove 1322, effectively avoiding the problem of one end of the return spring 120 being displaced.

[0062] In some embodiments of the present invention, the check valve 100 further includes a second sealing ring 160. A limiting ring groove is recessed on the outer peripheral circle of the mounting ring 150, and the second sealing ring 160 is snap-fitted into the limiting ring groove. In this way, the second sealing ring 160 can achieve a sealing effect when the mounting ring 150 is docked with other pipe interfaces, avoiding water leakage from the two interfaces.

[0063] The present invention also provides a flushing assembly 1000, which includes a liquid storage tank 200, a water pump 300, a switching valve 400, an upper flushing pipe 510, a main flushing pipe 520, and a check valve 100; a liquid storage cavity 210 is provided in the liquid storage tank 200; the water pump 300 is located outside the liquid storage tank 200 and is arranged close to the bottom wall of the liquid storage tank 200, and the water pump 300 communicates with the bottom of the liquid storage cavity 210; the switching valve 400 is provided with a water inlet pipe joint 410, an upper flushing pipe joint 420, and a main flushing pipe joint 430. The water inlet pipe joint 410 communicates with the water pump 300, the upper flushing pipe joint 420 communicates with the upper flushing pipe 510, and the main flushing pipe joint 430 communicates with the main flushing pipe 520; the check valve 100 is installed on the main flushing pipe joint 430 to prevent sewage from flowing back from the main flushing pipe 520 to the switching valve 400.

[0064] When the flushing assembly 1000 works, the water pump 300 is turned on, and water is pumped from the liquid storage tank 200, pressurized and conveyed into the switching valve 400, and finally sprayed out from the upper flushing pipe 510 and the main flushing pipe 520. The check valve 100 is installed on the main flushing pipe joint 430, which can avoid the problem that the liquid in the pipeline flows back after the water pump 300 stops working, resulting in sewage flowing back from the main flushing pipe 520 into the switching valve 400.

[0065] The above-mentioned water pump 300 can be a vane pump or a centrifugal pump. In some embodiments of the present invention, the water pump 300 is set as a speed-regulating water pump, and the speed-regulating water pump can adjust the water outlet speed. When used in cooperation with the switching valve 400, when the upper flushing pipe joint 420 of the switching valve 400 is opened, the speed-regulating water pump operates at a low power to perform the function of washing the ring, saving energy and reducing noise; when the main flushing pipe joint 430 of the switching valve 400 is opened, the speed-regulating water pump operates at a high power to achieve a high-performance flushing effect.

[0066] Please refer to Figure 8 and Figure 9, considering that after flushing, the water pump 300 stops working, and negative pressure is likely to form in the pipeline, causing the water in the liquid storage tank 200 to be sucked out, resulting in the problem of "water theft". Therefore, in some embodiments of the present invention, the flushing assembly 1000 further includes a vacuum breaker 700. The vacuum breaker 700 is arranged at the top of the liquid storage tank 200 and is connected between the water pump 300 and the water inlet joint 410. In this way, after the water pump 300 stops working, the vacuum breaker 700 sucks in gas to keep the air pressure inside and outside the pipeline balanced, effectively avoiding the occurrence of the above problems. At the same time, it can also prevent the dirty water in the toilet 2000 from flowing back through the nozzle pipeline.

[0067] In some embodiments of the present invention, the vacuum breaker 700 includes a housing 710, a water stop pad 730, and a push rod 740. An inlet interface 714 and an outlet interface 715 are arranged at the bottom of the housing 710. The push rod 740 is slidably installed in the inlet interface 714, and the water stop pad 730 is fixed to the top end of the push rod 740. A vent hole 712 is opened at the top of the housing 710 corresponding to the position of the push rod 740. The inlet interface 714 is communicated with the outlet of the water pump 300, and the outlet interface 715 is communicated with the water inlet interface. When the water pump 300 is working, water is pressurized and delivered to the vacuum breaker 700, the push rod 740 is pushed up, and the water stop pad 730 abuts against the vent hole 712 to achieve sealing, and water flows out along the outlet interface 715. When the water pump 300 stops working, the push rod 740 naturally falls under the action of gravity, and the vent hole 712 is opened, so that the air pressure inside and outside the vacuum breaker 700 is balanced.

[0068] For the convenience of assembly, in some embodiments of the present invention, the housing 710 includes a sealing gasket 720, an upper shell 711 and a lower shell 713 fixed by screw connectors. The inlet interface 714 and the outlet interface 715 are arranged on the lower shell 713, and the vent hole 712 corresponding to the inlet interface 714 is arranged on the upper shell 711. In this way, when assembling the vacuum breaker 700, the push rod 740 can be first inserted into the inlet interface 714 from above, and then the upper shell 711 is covered and fixed.

[0069] Please refer to Figure 10 and Figure 11, for the convenience of installing the water pump 300, in some embodiments of the present invention, the flushing assembly 1000 further includes a bracket 600. An installation platform 220 is formed on one side of the liquid storage tank 200. A limiting chute 221 is provided on the bottom surface of the installation platform 220. A limiting rib plate 610 is provided on the top of the bracket 600. The limiting rib plate 610 is slidably fitted in the limiting chute 221. The water pump 300 is installed at the bottom end of the bracket 600. With such a setting, when installing the water pump 300 on the liquid storage tank 200, the limiting rib plate 610 at the top of the bracket 600 can be correspondingly slid and inserted into the limiting chute 221. The installation is convenient, the structure is firm, and moreover, the bracket 600 can be used to carry other components, facilitating the spatial distribution of each component.

[0070] In some embodiments of the present invention, the flushing assembly 1000 further includes a cylindrical filter screen 810 and a water delivery pipe 820. The cylindrical filter screen 810 is arranged at the bottom of the liquid storage cavity 210. One end of the cylindrical filter screen 810 is rotatably buckled and fixed to one end of the water delivery pipe 820. The other end of the water delivery pipe 820 is communicated with the water pumping end of the water pump 300. With such a setting, the filter screen area of the cylindrical filter screen 810 is large, the filtering efficiency is high, which can meet the water pumping speed of the water pump 300 and is not easily blocked; moreover, the cylindrical filter screen 810 and the water delivery pipe 820 are rotatably buckled and fixed, which is convenient for assembly, the structure is firm, and it can prevent the cylindrical filter screen 810 from loosening due to the water flow impact in the liquid storage tank 200 during the operation of the water pump 300.

[0071] In some embodiments of the present invention, the flushing assembly 1000 further includes a water inlet valve 230. The water inlet valve 230 is installed at the top of the cavity wall of the liquid storage cavity 210. The water inlet valve 230 is used to communicate with an external tap water pipe to keep the maximum water level in the liquid storage cavity 210 always at a set height.

[0072] In some embodiments of the present invention, the switching valve 400 is connected to each component by a flexible connecting pipe 920, which is convenient for pipeline layout and alignment. The connection method between the flexible connecting pipe 920 and each joint of the switching valve 400 is diverse; in some embodiments of the present invention, the flushing assembly 1000 further includes two pressing plates 910 and a flexible connecting pipe 920. The water inlet pipe joint 410, the upper flushing pipe joint 420, and the main flushing pipe joint 430 are all connected with a flexible connecting pipe 920. The two pressing plates 910 are fastened by screw connectors and sleeved and fixed at the connection part between the flexible connecting pipe 920 and at least one of them. One of the two pressing plates 910 is fixed to the liquid storage tank 200. With such a setting, when assembling the flexible connecting pipe 920, it is convenient to align and insert the flexible connecting pipe 920 with the pipe joints of the switching valve 400, and the flexible connecting pipe 920 is pressed and fixed to the pipe joints by the pressing plates 910. It is not only convenient for assembly but also has a good sealing effect; the surface of the above-mentioned pressing plate 910 facing the flexible connecting pipe 920 is set to be arc-shaped to match the pipeline shape, and the pressing effect is good.

[0073] Please refer to Figure 12 and Figure 13 , the present invention also provides a toilet 2000, which includes a housing 1100 and a flushing assembly 1000; the housing 1100 is provided with an assembly cavity 1110, a wash ring water outlet 1111 and a main flushing water outlet 1112, the flushing assembly 1000 is assembled in the assembly cavity 1110, the upper flushing pipe 510 is communicated with the wash ring water outlet 1111, and the main flushing pipe 520 is communicated with the main flushing water outlet 1112.

[0074] When the toilet 2000 in the present invention flushes, the water pump 300 works to pump out the water in the liquid storage tank 200 and pressurize and transport it to the switching valve 400. The switching valve 400 discharges the water along the joint 420 of the upper flushing pipe 510 and the joint 430 of the main flushing pipe 520. The combination of the two flushing methods has high flushing cleanliness and is more water-saving; moreover, since the check valve 100 is provided at the joint 430 of the main flushing pipe 520, after the flushing is completed, the check valve 100 can effectively prevent the dirty water from flowing back from the main flushing pipe 520 to the switching valve 400, ensuring that the water in the flushing assembly 1000 is not contaminated by the dirty water. In addition, after the water pump 300 stops, the water pressure in the switching valve 400 is too small to push open the check valve 100, so a certain amount of water will be left, thus avoiding the adverse phenomena of generating blasting sounds or bubbles emerging from the main flushing pipe 520 during the next flushing.

[0075] Since the toilet 2000 of the present invention adopts all the technical solutions of the above-mentioned all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be elaborated here one by one.

[0076] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made by using the description and drawings of the present invention under the inventive concept of the present invention, or directly / indirectly applied to other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A check valve, applied to the flushing assembly of a toilet, characterized in that, The check valve includes: A valve seat, including a first installation pipe and a second installation pipe sleeved with each other. The outer wall of the first installation pipe is connected to the inner wall of the second installation pipe, and a drainage channel is formed between the first installation pipe and the second installation pipe; A return spring, one end of the return spring is sleeved outside the first installation pipe and abuts against the inner wall of the second installation pipe; A valve core, including a shaft body and a stop body. One end of the shaft body penetrates into the first installation pipe, and the other end of the shaft body passes through the return spring and is connected to the stop body. The other end of the return spring abuts against the stop body, and the periphery of the stop body is spaced from the inner wall surface of the second installation pipe; and A first sealing ring, installed between the inner wall of the second installation pipe and the periphery of the stop body; The check valve further includes a mounting ring. A clamping protrusion is provided on the end face of the second installation pipe facing the mounting ring. The first sealing ring is correspondingly provided with a clamping groove. The clamping protrusion is clamped into the clamping groove. The mounting ring is fixed to one end of the second installation pipe and presses against the first sealing ring. One groove wall of the clamping groove is arranged between the inner wall of the second installation pipe and the periphery of the stop body; One side of the stop body facing away from the shaft body is provided with an umbrella-shaped diversion slope, and the periphery of the diversion slope abuts against the first sealing ring.

2. The check valve according to claim 1, characterized in that, The ratio of the axial length of the first installation pipe to the length of the shaft body is 1 / 3 to 2 / 3.

3. The check valve according to claim 1, characterized in that, A plurality of connecting ribs are convexly arranged on the inner wall of the second installation pipe at intervals. The connecting ribs are connected to the outer wall of the first installation pipe, and the end of the return spring away from the stop body abuts against the connecting ribs.

4. The check valve according to claim 1, characterized in that, A circular groove is recessed on one side of the stop body facing the shaft body, and one end of the return spring abuts against the bottom wall of the circular groove.

5. A flushing component, characterized in that, It includes a liquid storage tank, a water pump, a switching valve, an upper flushing pipe, a main flushing pipe, and the check valve according to any one of claims 1 to 4; wherein, A liquid storage cavity is arranged in the liquid storage tank; The water pump is located outside the liquid storage tank and is arranged close to the bottom wall of the liquid storage tank. The water pump is communicated with the bottom of the liquid storage cavity; The switching valve is provided with a water inlet joint, an upper flushing pipe joint, and a main flushing pipe joint. The water inlet joint is communicated with the water pump, the upper flushing pipe joint is communicated with the upper flushing pipe, and the main flushing pipe joint is communicated with the main flushing pipe; The check valve is installed on the main flushing pipe joint to prevent sewage from flowing back from the main flushing pipe to the switching valve.

6. The flushing assembly according to claim 5, characterized in that, The flushing assembly further includes a bracket. An installation platform is formed on one side of the liquid storage tank. A limiting sliding groove is arranged on the bottom surface of the installation platform. A limiting rib plate is arranged on the top of the bracket. The limiting rib plate is slidably matched in the limiting sliding groove. The water pump is installed at the bottom end of the bracket.

7. The flushing component according to claim 5, wherein The flushing assembly further includes a vacuum breaker. The vacuum breaker is arranged on the top of the liquid storage tank. The vacuum breaker is communicated between the water pump and the water inlet joint.

8. The flushing assembly according to claim 5, wherein, The flushing assembly further includes a cylindrical filter screen and a water delivery pipe. The cylindrical filter screen is arranged at the bottom of the liquid storage cavity. One end of the cylindrical filter screen is rotationally buckled and fixed to one end of the water delivery pipe, and the other end of the water delivery pipe is communicated with the water pumping end of the water pump.

9. A toilet, characterized in that, It includes a housing and the flushing assembly according to any one of claims 5 to 8; the housing is provided with an assembly cavity, a washing ring water outlet and a main flushing water outlet. The flushing assembly is assembled in the assembly cavity. The upper flushing pipe is communicated with the washing ring water outlet, and the main flushing pipe is communicated with the main flushing water outlet.

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