Anti-overflow water tank

Abstract

The present invention relates to an anti-overflow water tank, comprising: a water tank, the water tank being provided with at least one water inlet, the water inlet being provided close to an edge of the top surface of the water tank; an anti-overflow pipe, the anti-overflow pipe being a curved pipe having at least one inflection point; the anti-overflow pipe extending from one side of the inflection point to both ends of the edge, the first end of the anti-overflow pipe being connected to the water inlet, and the water tank being placed horizontally or sideways, the water inlet end of the anti-overflow pipe being higher in height than the inflection point, and the inflection point being higher in height than the water outlet end of the anti-overflow pipe. The present invention avoids the backflow of water in the water tank by providing the anti-overflow pipe and utilizing the height difference between the end of the anti-overflow pipe and the inflection point and the water surface.

Description

Technical Field

[0001] The invention relates to the technical field of water tanks, in particular to an anti-overflow water tank. Background Art

[0002] Water-washing cleaning devices are widely used in family life for their convenient cleaning features. Water-washing cleaning devices that can absorb water on the market now mainly use a clean water tank to spray clean water on the cleaning surface, a brush plate or a roller brush to clean the cleaning surface, and the sewage after cleaning is absorbed into the sewage tank. Therefore, the sewage tank is an important part of the water-washing cleaning device.

[0003] Reference Figure 1 As shown, when the water-washing cleaning device cleans the wall or other inclined surfaces, the posture of the water tank will also change, causing the water in the water tank to flow out from the water inlet. For example, the water-washing cleaning device disclosed in Chinese patent CN105581741A sucks sewage into the sewage collection tank through the suction port near the center of the brush plate, and the sewage in the sewage collection tank flows into the sewage tank. When the water-washing cleaning device is tilted to work, the sewage tank with the water inlet will tilt, and the water inlet at a lower height on the sewage tank will flow back, that is, the water in the sewage tank will flow back into the sewage collection tank or back onto the cleaning surface, causing secondary pollution. Summary of the invention

[0004] To this end, the technical problem to be solved by the present invention is to overcome the defect in the prior art that water in the water tank will flow out from the water inlet when the water tank is tilted, and to provide an anti-overflow water tank that will not flow back when the water tank is working in a horizontal, vertical or tilted state.

[0005] In order to solve the above technical problems, the present invention provides an anti-overflow water tank, comprising:

[0006] A water tank, wherein the water tank is provided with at least one water inlet, and the water inlet is arranged near an edge of the top surface of the water tank;

[0007] An anti-overflow pipe, wherein the anti-overflow pipe is a curved pipe having at least one inflection point;

[0008] The overflow prevention pipe extends to both ends of the edge on one side of the inflection point, and the first end of the overflow prevention pipe is connected to the water inlet. Regardless of whether the water tank is placed horizontally or sideways, the height of the water inlet end of the overflow prevention pipe is higher than the height of the inflection point, and the height of the inflection point is higher than the height of the water outlet end of the overflow prevention pipe.

[0009] In one embodiment of the present invention, the anti-overflow pipe is arranged outside the water tank, and the second end of the anti-overflow pipe is a water inlet end.

[0010] In one embodiment of the present invention, one water inlet is provided, one overflow prevention pipe is provided correspondingly, the overflow prevention pipe is provided with an inflection point, the water inlet is provided corresponding to one end of the edge, the inflection point is provided corresponding to the other end of the edge, and the second end of the overflow prevention pipe is provided corresponding to the middle of the edge.

[0011] In one embodiment of the present invention, there are multiple water inlets, each of which is connected to the first end of the anti-overflow pipe, and each of the anti-overflow pipes is provided with an inflection point. The water inlets are arranged corresponding to the two ends of the edge, the inflection points and the corresponding water inlets are respectively located at the two ends of the edge, and the second end of the anti-overflow pipe is arranged corresponding to the middle part of the edge.

[0012] In one embodiment of the present invention, the anti-overflow pipe is arranged in the water tank, and the second end of the anti-overflow pipe is a water outlet end.

[0013] In one embodiment of the present invention, the water tank is provided with a water inlet, the anti-overflow pipe is provided with one corresponding to the water inlet, the inflection point of the anti-overflow pipe is provided with one, the water inlet is provided corresponding to the middle part of the edge, and the inflection point and the second end of the anti-overflow pipe correspond to the two ends of the edge respectively.

[0014] In one embodiment of the present invention, there are multiple water inlets, each of which is connected to an anti-overflow pipe, and the water inlets are arranged corresponding to the middle of the edge. Each of the anti-overflow pipes is provided with an inflection point, and the inflection point and the second end of the anti-overflow pipe are respectively located at the two ends of the edge.

[0015] In one embodiment of the present invention, a plurality of water inlets are provided, and the plurality of water inlets are all connected to a first end of an overflow prevention tube, and the water inlet is provided corresponding to the middle of the edge, and the overflow prevention tube is provided with an inflection point, and the inflection point and the second end of the overflow prevention tube are provided corresponding to the two ends of the edge respectively.

[0016] In one embodiment of the present invention, it also includes:

[0017] An extension pipe, wherein a first end of the extension pipe is connected to the water inlet end of the overflow prevention pipe, and a second end of the extension pipe is higher than the inflection point and the water inlet.

[0018] In one embodiment of the present invention, it also includes:

[0019] A water outlet is arranged near the opposite side corresponding to the edge, and a one-way water outlet valve is arranged at the water outlet.

[0020] In one embodiment of the present invention, an acute angle is formed between the two side surfaces of the water tank connected by the opposite sides, and the position of the side surface of the water tank corresponding to the water outlet is set to a V shape, so that the water outlet is located at a low position of the water tank.

[0021] In one embodiment of the present invention, each surface of the water tank may be any one of a flat surface, a bent surface or a curved surface.

[0022] In one embodiment of the present invention, the surface where the water inlet is located is a bent surface, the bent surface includes a first step and a second step, the first step is higher than the second step, the water inlet is arranged on the second step, and the water inlet end of the overflow prevention pipe is higher than the first step.

[0023] The above technical solution of the present invention has the following advantages compared with the prior art:

[0024] The anti-overflow water tank described in the present invention is essentially a water tank inlet pipe that is bent to one side of the water tank that may be tilted and then bent to the other side opposite to the inside of the water tank. By setting up this anti-overflow pipe with an inflection point and utilizing the height difference between the end of the anti-overflow pipe and the inflection point and the water surface, backflow of water in the water tank is avoided, thereby avoiding secondary pollution when used in a sewage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein

[0026] Figure 1 It is a schematic diagram of a water tank in the prior art;

[0027] Figure 2 It is a schematic diagram of the tilting of the water tank of the present invention;

[0028] Figure 3 Schematic diagram of the anti-overflow pipe of the present invention;

[0029] Figure 4 is a schematic diagram of Embodiment 1 of the present invention;

[0030] Figure 5 is a schematic diagram of another angle of embodiment 1 of the present invention;

[0031] Figure 6 is a schematic diagram of Embodiment 2 of the present invention;

[0032] Figure 7 is a schematic diagram of another angle of embodiment 2 of the present invention;

[0033] Figure 8 is a schematic diagram of Embodiment 3 of the present invention;

[0034] Fig. 9is a schematic diagram of a fourth embodiment of the present invention;

[0035] Fig.10 is a schematic diagram of another angle of embodiment 4 of the present invention;

[0036] Fig.11 is a schematic diagram of Embodiment 5 of the present invention;

[0037] Fig.12 2 is a schematic diagram of Embodiment 6 of the present invention.

[0038] Description of the accompanying drawings in the specification: 10, water tank; 11, first side; 12, fourth side; 13, fifth side; 14, edge; 15, opposite side; 16, third vertex; 17, water inlet; 18, water outlet; 19, one-way water outlet valve;

[0039] 20. Anti-overflow pipe; 21. First end; 22. Second end; 23. Inflection point; 24. First anti-overflow pipe; 25. Second anti-overflow pipe;

[0040] 30. Extension tube. DETAILED DESCRIPTION

[0041] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0042] Reference Figure 2 As shown, an anti-overflow water tank 10 of the present invention, taking a sewage tank 10 of a water washing cleaning device as an example, comprises:

[0043] The water tank 10 is provided with at least one water inlet 17, and the water inlet 17 is provided near an edge 14 of the top surface of the water tank 10. Since the water tank 10 can work in a horizontal state and a vertical state respectively, when the water inlet 17 is provided at any position on the top surface of the water tank 10, in the horizontal working state, the water inlet 17 is at the high point of the water tank 10, the water surface is lower than the water inlet 17, and the sewage will not flow back from the water inlet 17. In the vertical state, the top surface of the water tank 10 becomes a vertical surface, and the water inlet 17 is not necessarily located at the highest point, so that the sewage in the water tank 10 is easy to submerge the water inlet 17, and then flow out from the water inlet 17. Therefore, in this embodiment, the water inlet 17 is provided at a position near the edge 14, and when the water tank 10 is in a vertical state, when the edge 14 is still located at a high position, the water inlet 17 is still at a high position, so that the sewage in the water tank 10 will not flow back in the vertical state.

[0044] The overflow prevention pipe 20 is a curved pipe having at least one inflection point 23. In this embodiment, the overflow prevention pipe 20 is preferably a U-shaped pipe, and of course, it can also be a Z-shaped pipe, a round pipe, a V-shaped pipe, etc. The height difference between the end of the overflow prevention pipe 20 and the inflection point 23 is used to ensure that the sewage in the water tank 10 cannot pass through the overflow prevention pipe 20 and flow out of the water inlet 17, thereby effectively preventing the sewage from flowing back.

[0045] Specifically, refer to Figure 2 As shown in (a) and (b), the overflow prevention tube 20 is located in the water tank 10, the first end 21 of the overflow prevention tube 20 connected to the water inlet 17 is the water inlet end, the second end 22 of the overflow prevention tube 20 is the water outlet end, the overflow prevention tube 20 extends to both ends of the edge 14 on one side of the inflection point 23, the first end 21 of the overflow prevention tube 20 is connected to the water inlet 17, and the height of the water inlet end of the overflow prevention tube 20 is higher than the height of the inflection point 23. Figure 3 As shown, the overflow prevention pipe 20 is divided into two sections with the inflection point 23 as the dividing point, and the length of at least one section is equivalent to the length of the edge 14. When the water tank 10 is in a horizontal or vertical state, that is, when it is placed flat or on its side, the height of the water inlet end is higher than the height of the inflection point 23, and the height of the inflection point is higher than the height of the water outlet end. Therefore, when working in a horizontal or vertical state, since the height of the inflection point 23 is lower than the water inlet end, the sewage flowing in from the water inlet end can smoothly enter the sewage tank 10, and even if there is some sewage in the overflow prevention pipe 20, due to the high height of the water inlet end, this part of the sewage cannot flow out from the water inlet end. When the water tank 10 is tilted, one end of the overflow prevention pipe 20 is always at the highest point when the water tank 10 is tilted. In this embodiment, when the water tank 10 is tilted toward the water outlet 18, the height of the water outlet 18 is relatively low and it is immersed in the sewage, but the height of the inflection point 23 is relatively high, and the height of the sewage entering the overflow prevention pipe 20 from the water outlet 18 is the same as the height of the sewage in the water tank 10, and it cannot cross the inflection point 23, so that the sewage in the water tank 10 cannot flow back. When the water tank 10 is tilted toward the inflection point 23, the height of the inflection point 23 is relatively low and it is immersed in the sewage, but the height of the water outlet 18 is relatively high, and the sewage in the water tank 10 cannot even enter the overflow prevention pipe 20 from the water outlet 18, effectively preventing the sewage from flowing back.

[0046] Reference Figure 4 As shown, as a preferred embodiment 1 of the present invention, in the water washing cleaning device, since there is a certain distance between the water inlet 17 of the sewage tank 10 and the cleaning surface or the sewage collecting tank, a connecting pipe is required for connection. Therefore, the present invention directly uses an anti-overflow pipe 20 to connect the cleaning surface and the sewage tank, so that the anti-overflow pipe 20 is arranged outside the water tank 10, and the first end 21 of the anti-overflow pipe 20 is connected to the water inlet 17 of the water tank 10. At this time, the second end 22 of the anti-overflow pipe 20 is the water inlet end.

[0047] The water tank 10 in the present invention can be a hexahedral structure or other curved surface structure. In the first embodiment of the present invention, taking the hexahedral structure as an example, the water tank 10 has a first side 11 and a second side relative to each other, a third side and a fourth side 12 relative to each other, and a fifth side 13 and a sixth side relative to each other. The first side 11 is the top surface, the second side is the bottom surface, the third side is the front surface, and the fourth side 12 is the back surface. The first side 11, the third side and the sixth side intersect at the first vertex, the first side 11, the third side and the fifth side 13 intersect at the second vertex, and the edge line between the first vertex and the second vertex is the edge 14. The second side, the fourth side 12 and the sixth side intersect at the third vertex 16, and the second side and the fourth side 12 intersect at the opposite side 15 of the edge 14. The overflow prevention pipe 20 is arranged outside the water tank 10, and the number of the overflow prevention pipes 20 is not greater than the number of the water inlet 17. In this embodiment, when there is one water inlet 17, there is one overflow prevention pipe 20 correspondingly arranged. At the same time, in order to simplify the structure of the overflow prevention tube 20 and reduce the space occupied by the overflow prevention tube 20, an inflection point 23 is set on the overflow prevention tube 20. Then, the length of one side of the overflow prevention tube 20 on both sides of the inflection point 23 is set corresponding to the length of the edge 14, and the other side can be set arbitrarily. Since in the water washing cleaning device, the sewage is usually collected in the middle of the brush plate and then sucked, the water inlet end is preferably set corresponding to the middle of the water tank 10. In this embodiment, the second end 22 of the overflow prevention tube 20 is set as the water inlet end corresponding to the middle of the edge 14, and its first end 21 and the inflection point 23 are respectively set corresponding to the two ends of the edge 14. At this time, the water inlet 17 connected to the first end 21 is set corresponding to one end of the edge 14, that is, the first vertex, and the inflection point 23 is set corresponding to the other end of the edge 14, that is, the second vertex.

[0048] In the present invention, in order to conveniently discharge the sewage in the sewage tank 10, a water outlet 18 is also included, and the water outlet 18 is arranged near the opposite side 15 corresponding to the edge 14, that is, the edge line where the second side surface and the fourth side surface 12 intersect in this embodiment. Since the second side surface is the bottom surface, the water outlet 18 is arranged at a position close to the opposite side 15 on the fourth side surface 12. In order to control the discharge of sewage, a one-way water outlet valve 19 is arranged at the water outlet 18.

[0049] When the sewage tank 10 is disposed in the water washing cleaning device, the second end 22 of the overflow prevention pipe 20 is connected to the sewage collection tank outside the sewage tank 10, and the sewage enters the interior of the water tank 10 through the overflow prevention pipe 20. Figure 4As shown, the cleaning surface of the water washing cleaning device is a horizontal plane. In this working state, the first side 11 of the water tank 10 is at the top, the second side is at the bottom, the first vertex and the second vertex are at the upper end, and the second end 22 of the overflow prevention tube 20 is on the upper side of the water tank 10. The second end 22 of the overflow prevention tube 20 is higher than the inflection point 23 of the overflow prevention tube 20 and the water inlet 17 at the same time. The sewage flows into the water tank 10 from the second end 22 of the overflow prevention tube 20, and the sewage in the water tank 10 cannot flow out from the first end 21 of the overflow prevention tube 20, that is, the water inlet 17 of the water tank 10.

[0050] Furthermore, in order to gather the sewage in the water tank 10 to the water outlet 18, the angle at which the two sides of the water tank 10 connected by the opposite side 15, namely the second side and the fourth side 12, intersect is an acute angle, and the side of the water tank 10 corresponding to the position of the water outlet 18 is set to be V-shaped. In this embodiment, the second side is specifically set to be V-shaped, and the lowest point of the V-shape corresponds to the position of the water outlet 18, so that the water outlet 18 is located at the low position of the water tank 10. The sewage is discharged through the outlet valve, and no sewage will remain.

[0051] Reference Figure 4 and Figure 5 As shown, when the water washing cleaning device cleans a vertical or inclined plane, in this working state, the third side of the water tank 10 is on the top, the fourth side 12 is on the bottom, and the overflow prevention pipe 20 is still at the upper end of the water tank 10, so that the sewage can flow into the water tank 10 from the second end 22 of the overflow prevention pipe 20, and the water outlet 18 is still at the lowest point of the water tank 10, so that the sewage can be discharged. When the water tank 10 is tilted clockwise with the third vertex 16 as a reference, the inflection point 23 of the overflow prevention pipe 20 is raised due to the tilt, and the position is higher than the first end 21 of the overflow prevention pipe 20, thereby preventing the sewage in the water tank 10 from flowing out from the first end 21 of the overflow prevention pipe 20 to the second end 22; when the water tank 10 is tilted counterclockwise around the third vertex 16, the first end 21 of the overflow prevention pipe 20 is raised due to the tilt, and is higher than the water surface of the sewage, thereby preventing the sewage in the water tank 10 from flowing out from the first end 21 of the overflow prevention pipe 20 to the second end 22.

[0052] Furthermore, the first side surface 11 to the sixth side surface of the water tank 10 can be any surface such as a plane, a bent surface or a curved surface. In this embodiment, the surface where the water inlet 17 is located and the first side surface 11 are bent surfaces are taken as an example. The bent surface includes a first step and a second step. The first step is higher than the second step. The water inlet 17 is arranged on the second step, that is, the anti-overflow pipe 20 is connected to the second step. This form not only ensures the regularity of the overall structure of the water tank 10, but also helps to make full use of the space inside the water washing and cleaning device, and even if the water tank 10 is in a vertical state, it can still accommodate more sewage. At the same time, the water inlet end of the anti-overflow pipe 20, that is, the second end 22 in this embodiment, is higher than the first step, so the sewage inside the sewage tank 10 will not flow back.

[0053] In summary, by setting the overflow prevention pipe 20, it is possible to effectively prevent sewage from flowing back, so that the sewage tank 10 can collect sewage effectively; by setting the water outlet 18 at the lowest point of the water tank 10, the sewage tank 10 can discharge sewage effectively.

[0054] Reference Figure 6 and Figure 7 As shown, as the preferred embodiment 2 of the present invention, the difference from the embodiment 1 is that, in order to improve the efficiency of collecting sewage, a plurality of water inlets 17 are provided, and two are provided in this embodiment. To ensure that each water inlet 17 will not have backflow. In this embodiment, each of the water inlets 17 is respectively connected to the first end 21 of the overflow prevention pipe 20. In order to simplify the structure of the overflow prevention pipe 20 and reduce the space occupied by the overflow prevention pipe 20, each of the overflow prevention pipes 20 is provided with an inflection point 23, so that the overflow prevention pipe 20 forms a U-shaped pipe. Since the overflow prevention pipe 20 is located outside the water tank 10, in order to match the position of the sewage collection tank, the second end 22 of the overflow prevention pipe 20 is arranged corresponding to the middle of the edge 14, that is, the middle of the water tank 10, and the two water inlets 17 are arranged corresponding to the two ends of the edge 14. Of course, if there is enough space, it can also be arranged at only one end. The inflection point 23 and the corresponding water inlet 17, that is, the first end 21 of the overflow prevention pipe 20 are respectively located at the two ends of the edge 14.

[0055] When the sewage tank 10 is disposed in the water washing cleaning device, the second end 22 of the overflow prevention pipe 20 is connected to the sewage collection tank outside the sewage tank 10, and the sewage enters the interior of the water tank 10 through the overflow prevention pipe 20. Figure 6 and Figure 7 As shown, the cleaning surface of the water-washing cleaning device is a horizontal plane. In this working state, the first side 11 of the water tank 10 is at the top, the second side is at the bottom, and the two anti-overflow pipes 20 are on the upper side of the water tank 10. The sewage of the water-washing cleaning device flows into the water tank 10 from the second ends 22 of the two anti-overflow pipes 20, passes through the one-way water outlet valve 19, and is discharged from the water outlet 18, and the sewage will not flow back.

[0056] Continue to see Figure 6 and Figure 7When the water washing cleaning device cleans a vertical surface or an inclined plane, in this working state, the third side surface of the water tank 10 is on the top, the fourth side surface 12 is on the bottom, and the two overflow prevention pipes 20 are still at the upper end of the water tank 10, so that the sewage can flow into the water tank 10 from the second end 22 of the overflow prevention pipe 20, and the water outlet 18 is still at the lowest point of the water tank 10, so that the sewage can be discharged. When the water tank 10 is tilted clockwise with the third vertex 16 as a reference, the first end 21 of the first overflow prevention pipe 24 connected to the upper water inlet 17 and the inflection point 23 of the second overflow prevention pipe 25 connected to the lower water inlet 17 in the two overflow prevention pipes 20 are raised due to the tilt, and the positions are higher than the water surface and the first end 21 of the second overflow prevention pipe 25, respectively, thereby preventing the sewage in the water tank 10 from flowing out from the first end 21 of the two overflow prevention pipes 20 to the second end 22. When the water tank 10 is tilted counterclockwise with the third vertex 16 as a reference, the inflection point 23 of the first overflow prevention tube 24 and the first end 21 of the second overflow prevention tube 25 are raised due to the tilt, and their positions are respectively higher than the first end 21 of the first overflow prevention tube 24 and the sewage surface, thereby preventing the sewage in the water tank 10 from flowing out from the first end 21 to the second end 22 of the two overflow prevention tubes 20.

[0057] In other embodiments of the present invention, when multiple water inlets 17 are arranged at the same end of the edge 14, only one overflow prevention pipe 20 may be provided, and the multiple water inlets 17 can be connected to the first end 21 of the overflow prevention pipe 20. At this time, all the water inlets 17, that is, the first end 21 of the overflow prevention pipe 20, can be located at the two ends of the edge 14 respectively together with the inflection point 23 of the overflow prevention pipe 20, to ensure that no backflow occurs.

[0058] In the above embodiment, the first side surface 11 can also be a bent surface, with a first step and a second step, the first step is higher than the second step, and the two overflow prevention pipes 20 are placed on the second step, which not only ensures the regularity of the overall structure of the sewage tank 10, but also helps to save space inside the water cleaning device. At the same time, the second ends 22 of the two overflow prevention pipes 20 are higher than the first step, and the water inside the water tank 10 will not flow back. Therefore, two overflow prevention pipes 20 are arranged outside the water tank 10 to prevent sewage from flowing back. In practical applications, three, four or more overflow prevention pipes 20 can also be arranged outside the water tank 10.

[0059] Reference Figure 8As shown, when the external space of the water tank 10 is insufficient or in order to protect the overflow prevention pipe 20, the overflow prevention pipe 20 is arranged inside the water tank 10, and the second end 22 of the overflow prevention pipe 20 is the water outlet, and the first end 21 of the overflow prevention pipe 20 connected to the water inlet 17 is the water inlet. In this case, still taking the hexahedral water tank 10 as an example, the water inlet 17 is arranged on the first side surface 11 near the edge 14. The angle at which the second side surface connected to the opposite side 15 and the fourth side surface 12 intersect is an acute angle, and the water outlet 18 is close to the opposite side 15 and arranged on the fourth side surface 12. The second side surface is V-shaped, and the water outlet 18 is arranged corresponding to the lowest point of the second side surface, and a one-way water outlet valve 19 is installed.

[0060] Take the sewage tank 10 installed in the water washing cleaning device as an example. When working, the water inlet 17 of the water tank 10 is connected to the sewage collection tank. When the cleaning surface is horizontal, the first side 11 of the water tank 10 is on the top and the second side is on the bottom. The sewage enters the overflow prevention pipe 20 through the first end 21 of the overflow prevention pipe 20 connected to the water inlet 17, and then flows into the water tank 10 from the second end 22 and is discharged through the one-way water outlet valve 19. When the cleaning surface is vertical or inclined, the fourth side 12 of the water tank 10 is on the bottom and the third side is on the top. The overflow prevention pipe 20 is at the upper part of the water tank 10. The sewage flows into the overflow prevention pipe 20 through the water inlet 17, and then is collected in the sewage tank 10 and discharged through the drain valve. When the water tank 10 is tilted, one end of the overflow prevention tube 20 is always at the highest point when the water tank 10 is tilted. In this embodiment, when the water tank 10 is tilted toward the second end 22 of the overflow prevention tube 20, the second end 22 of the overflow prevention tube 20 is relatively low and immersed in the sewage, but the inflection point 23 is relatively high, and the height of the sewage entering the overflow prevention tube 20 from the second end 22 is the same as the height of the sewage in the water tank 10, and cannot cross the inflection point 23, so that the sewage in the water tank 10 cannot flow back. When the water tank 10 is tilted toward the inflection point 23, the inflection point 23 is relatively low and immersed in the sewage, but the second end 22 of the overflow prevention tube 20 is relatively high, and the sewage in the water tank 10 cannot even enter the overflow prevention tube 20 from the second end 22, effectively preventing the sewage from flowing back.

[0061] In the third specific embodiment of the present invention, referring to Figure 8 As shown, the water tank 10 is provided with a water inlet 17, and the anti-overflow pipe 20 is provided with one corresponding to the water inlet 17. In order to simplify the structure of the anti-overflow pipe 20, the anti-overflow pipe 20 is provided with one inflection point 23. In the water washing cleaning device, the sewage is gathered at the center of the brush plate. In order to facilitate the connection of the sewage, the water inlet 17 is provided corresponding to the middle of the edge 14, and the inflection point 23 located in the water tank 10 and the second end 22 of the anti-overflow pipe 20 correspond to the two ends of the edge 14 respectively.

[0062] When the surface to be cleaned is a horizontal plane, the first side surface 11 of the water tank 10 is on the top and the second side surface is on the bottom. The overflow prevention pipe 20 is on the upper side inside the water tank 10. The sewage flows into the first end 21 of the overflow prevention pipe 20 through the water inlet 17 and flows out from the second end 22 of the overflow prevention pipe 20. It is then collected into the water tank 10 and discharged through the one-way water outlet valve 19.

[0063] Continue to see Figure 8 When the surface to be cleaned is a vertical or inclined surface, the third side surface of the water tank 10 is on the top, the fourth side surface 12 is on the bottom, and the overflow prevention pipe 20 is still above the inside of the sewage tank 10. The sewage flows into the overflow prevention pipe 20 through the water inlet 17, and then is collected into the sewage tank 10 and discharged through the one-way water outlet valve 19. When the water tank 10 is tilted counterclockwise with the third vertex 16 as the reference, the second end 22 of the overflow prevention pipe 20 is raised due to the tilt, and the position is higher than the inflection point 23 of the overflow prevention pipe 20 and the water surface, thereby preventing the sewage from flowing out from the second end 22 of the overflow prevention pipe 20 to the first end 21. When the water tank 10 is tilted clockwise with the third fixed point as the reference, the inflection point 23 of the overflow prevention pipe 20 is raised due to the tilt, and the position is higher than the second end 22 of the overflow prevention pipe 20, thereby preventing the sewage in the water tank 10 from flowing out from the second end 22 of the overflow prevention pipe 20 to the first end 21.

[0064] Therefore, when the overflow prevention pipe 20 is located in the water tank 10, when the water washing cleaning device cleans the horizontal surface, the vertical surface and the inclined surface, the sewage will not flow back.

[0065] Reference Fig. 9 and 10 As shown, it is the fourth embodiment of the present invention, there is one water inlet 17, and the water inlet 17 is arranged on the sixth surface near the edge 14. At this time, in order to ensure that the height of the water inlet end is higher than the height of the inflection point 23, the second end 22 to the inflection point 23 of the overflow prevention pipe 20 is located in the water tank 10, and the first end 21 passes through the water inlet 17 and extends to above the first side surface 11.

[0066] When the plane to be cleaned is a horizontal plane, the first side 11 of the water tank 10 is on the top and the second side is on the bottom. The sewage in the water cleaning device flows into the sewage tank 10 through the first end 21 of the overflow prevention pipe 20 and is discharged by the one-way water outlet valve 19, and the sewage will not flow back. When the plane to be cleaned is a vertical plane or an inclined plane, the third side of the water tank 10 is on the top and the fourth side 12 is on the bottom. At this time, the overflow prevention pipe 20 is still located above the water tank 10. When the water tank 10 is tilted clockwise with the third vertex 16 as the reference, the inflection point 23 of the overflow prevention pipe 20 is higher than the second end 22, thereby preventing the sewage from flowing out from the second end of the overflow prevention pipe 20 to the first end 21; when the water tank 10 is tilted counterclockwise with the third vertex 16 as the reference, the second end 22 of the overflow prevention pipe 20 is raised due to the tilt, and the position is higher than the inflection point 23 of the overflow prevention pipe 20 and the water surface, thereby preventing the sewage in the water tank 10 from flowing out from the second end 22 of the overflow prevention pipe 20.

[0067] Reference Fig.11 As shown, in the fifth embodiment of the present invention, the water inlet 17 is provided at a position near the edge 14 on the first side 11 in multiple numbers, and two are specifically provided in this embodiment. Each of the water inlets 17 is connected to one of the anti-overflow pipes 20, that is, two anti-overflow pipes 20 are provided. In order to facilitate the connection of sewage, the water inlet 17 is provided corresponding to the middle of the edge 14, and each of the anti-overflow pipes 20 is provided with an inflection point 23, and the inflection point 23 and the second end 22 of the anti-overflow pipe 20 are respectively located at the two ends of the edge 14. In this embodiment, in order to avoid interference between the two anti-overflow pipes 20, the two anti-overflow pipes 20 are arranged opposite to each other.

[0068] The sewage tank 10 is placed in the water washing cleaning device, and the two water inlets 17 are connected to the sewage tank of the water washing cleaning device. When the cleaning surface is a horizontal surface, the first side surface 11 of the water tank 10 is on the top. When working, the sewage enters the two overflow prevention pipes 20 through the two water inlets 17, is collected in the water tank 10, and is discharged through the water outlet 18. When the cleaning surface is a vertical surface or an inclined surface, continue to see Fig. 9 , the third side surface is on the top, the fourth side surface 12 is on the bottom, the two overflow prevention pipes 20 are still placed at the highest point of the water tank 10, so that the sewage can flow into the water tank 10 from the first ends 21 of the two overflow prevention pipes 20, and the water outlet 18 is still located at the lowest point of the water tank 10, so that the sewage can be discharged. When the water tank 10 is tilted counterclockwise with the third vertex 16 as a reference, the inflection point 23 of the first overflow prevention pipe 24 and the second end 22 of the second overflow prevention pipe 25 of the two overflow prevention pipes 20 are raised due to the tilt, and the positions are higher than the second end 22 of the first overflow prevention pipe 24 and the sewage surface, respectively, thereby preventing the sewage in the water tank 10 from flowing out from the second ends 22 of the two overflow prevention pipes 20 to the first end 21. When the water tank 10 is tilted clockwise with the third vertex 16 as a reference, the second end 22 of the first anti-overflow pipe 24 and the inflection point 23 of the second anti-overflow pipe 25 are raised due to the tilt, and their positions are respectively higher than the water surface and the first end 21 of the second anti-overflow pipe 25, thereby preventing the sewage in the water tank 10 from flowing out from the second ends 22 of the two anti-overflow pipes 20 to the first end 21.

[0069] Reference Fig.12 As shown, in the sixth embodiment of the present invention, a plurality of water inlets 17 are arranged near the middle of the edge 14. Since the positions of the water inlets 17 are concentrated, the plurality of water inlets 17 can be connected to an anti-overflow pipe 20. The anti-overflow pipe 20 is a simple structure with an inflection point 23. The first end 21 of the anti-overflow pipe 20 is connected to the plurality of water inlets 17. The second end 22 of the anti-overflow pipe 20 and the inflection point 23 are arranged corresponding to the two ends of the edge 14.

[0070] When the surface to be cleaned is a horizontal surface, the first side 11 of the water tank 10 is on the top and the second side is on the bottom, and the sewage in the water washing and cleaning device flows into the water tank 10 through the first end 21 and the second end 22 of the overflow prevention pipe 20, and flows out from the water outlet 18, and the sewage will not flow back. When the surface to be cleaned is a vertical surface or an inclined surface, the third side is on the top and the fourth side 12 is on the bottom, and the overflow prevention pipe 20 is still placed at the highest point of the water tank 10, so that the sewage can flow into the water tank 10 from the first end 21 of the overflow prevention pipe 20, and will not flow back. When the water tank 10 is tilted counterclockwise with the third vertex 16 as a reference, the second end 22 of the overflow prevention pipe 20 is raised due to the tilt, and the position is higher than the inflection point 23 of the overflow prevention pipe 20 and the sewage surface, respectively, thereby preventing the sewage in the water tank 10 from flowing from the second end 22 of the overflow prevention pipe 20 to the first end 21. When the water tank 10 is tilted clockwise with the third vertex 16 as a reference, the inflection point 23 of the overflow prevention tube 20 is raised due to the tilt and is higher than the first end 21 of the second overflow prevention tube 25, thereby preventing the sewage in the water tank 10 from flowing out from the second ends 22 of the two overflow prevention tubes 20 to the first end 21.

[0071] Furthermore, since the water inlet end is not at the same height as the cleaning surface, an extension pipe 30 is provided to ensure that the sewage on the cleaning surface can be adsorbed, and the first end 21 of the extension pipe 30 is connected to the water inlet end of the overflow prevention pipe 20. When the overflow prevention pipe 20 is located outside the water, the first end 21 of the extension pipe 30 is connected to the second end 22 of the overflow prevention pipe 20. When the overflow prevention pipe 20 is located in the water tank 10, the first end 21 of the extension pipe 30 is connected to the first end 21 of the overflow prevention pipe 20. The second end 22 of the extension pipe 30 is higher than the inflection point 23 and the water inlet 17, so that when the water tank 10 is tilted, the sewage will not flow back from the extension pipe 30.

[0072] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. An anti-overflow water tank, characterized in that: include: A water tank, wherein the water tank is provided with at least one water inlet, and the water inlet is arranged near an edge of the top surface of the water tank; An anti-overflow pipe, wherein the anti-overflow pipe is a curved pipe having at least one inflection point; The inflection point is located at one end of the edge, the overflow prevention tube extends from one end of the edge to the other end of the edge, the first end of the overflow prevention tube is connected to the water inlet, and no matter the water tank is placed horizontally or sideways, the height of the water inlet end of the overflow prevention tube is higher than the height of the inflection point, and the height of the inflection point is higher than the height of the water outlet end of the overflow prevention tube.

2. The anti-overflow water tank according to claim 1, characterized in that: The anti-overflow pipe is arranged outside the water tank, and the second end of the anti-overflow pipe is a water inlet end.

3. The anti-overflow water tank according to claim 2, characterized in that: One water inlet is provided, one overflow prevention pipe is provided correspondingly, an inflection point is provided on the overflow prevention pipe, the water inlet is provided corresponding to one end of the edge, the inflection point is provided corresponding to the other end of the edge, and the second end of the overflow prevention pipe is provided corresponding to the middle of the edge.

4. The anti-overflow water tank according to claim 2, characterized in that: There are multiple water inlets, each of which is connected to the first end of the anti-overflow pipe, and each of the anti-overflow pipes is provided with an inflection point. The water inlets are arranged corresponding to the two ends of the edge, and the inflection points and the corresponding water inlets are respectively located at the two ends of the edge, and the second end of the anti-overflow pipe is arranged corresponding to the middle part of the edge.

5. The anti-overflow water tank according to claim 1, characterized in that: The anti-overflow pipe is arranged in the water tank, and the second end of the anti-overflow pipe is a water outlet end.

6. The anti-overflow water tank according to claim 5, characterized in that: The water tank is provided with a water inlet, an anti-overflow pipe is provided corresponding to the water inlet, an inflection point of the anti-overflow pipe is provided, the water inlet is provided corresponding to the middle of the edge, and the inflection point and the second end of the anti-overflow pipe correspond to the two ends of the edge respectively.

7. The anti-overflow water tank according to claim 5, characterized in that: There are multiple water inlets, each of which is connected to an anti-overflow pipe. The water inlets are arranged corresponding to the middle of the edge, and each of the anti-overflow pipes is provided with an inflection point. The inflection point and the second end of the anti-overflow pipe are respectively located at the two ends of the edge.

8. The anti-overflow water tank according to claim 5, characterized in that: There are multiple water inlets, all of which are connected to the first end of an overflow prevention tube. The water inlets are arranged corresponding to the middle of the edge. The overflow prevention tube has an inflection point. The inflection point and the second end of the overflow prevention tube are arranged corresponding to the two ends of the edge respectively.

9. The anti-overflow water tank according to claim 1, characterized in that: Also includes: An extension pipe, wherein a first end of the extension pipe is connected to the water inlet end of the overflow prevention pipe, and a second end of the extension pipe is higher than the inflection point and the water inlet.

10. The anti-overflow water tank according to claim 1, characterized in that: Also includes: A water outlet is arranged near the opposite side corresponding to the edge, and a one-way water outlet valve is arranged at the water outlet.

11. The anti-overflow water tank according to claim 10, characterized in that: An acute angle is formed between the two side surfaces of the water tank connected by the opposite sides, and the position of the side surface of the water tank corresponding to the water outlet is set to a V shape, so that the water outlet is located at a low position of the water tank.

12. The anti-overflow water tank according to claim 1, characterized in that: Each surface of the water tank may be a flat surface, a bent surface or a curved surface.

13. The anti-overflow water tank according to claim 12, characterized in that: The surface where the water inlet is located is a bent surface, and the bent surface includes a first step and a second step, the first step is higher than the second step, the water inlet is arranged on the second step, and the water inlet end of the overflow prevention pipe is higher than the first step.

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