Filtering device and pool cleaning equipment

Abstract

The utility model relates to the technical field of cleaning equipment, in particular to a filtering device and pool cleaning equipment. The first filtering assembly is arranged on the main body and is communicated with the cavity; the flow guide surface is arranged on the main body and is communicated with the cavity; the second filtering assembly is arranged on the main body and located on the side, away from the cavity, of the flow guide face; in the closed state, the second filtering assembly covers the flow guide face, and at least part of water flow sequentially passes through the flow guide face and the second filtering assembly and then flows out; in the opening state, the second filtering assembly is separated from the flow guide face, and at least part of water flows out after passing through the flow guide face and does not pass through the second filtering assembly; water pressure in the main body can act on the second filtering assembly to drive the second filtering assembly to be separated from the flow guide face, the filtering hole diameter is changed, then at least part of water flows out through the flow guide face and does not pass through the second filtering assembly, and the situation that the main body is blocked is relieved.

Description

Technical Field

[0001] This utility model relates to the field of cleaning equipment technology, and in particular to a filtration device and a water tank cleaning device. Background Technology

[0002] Pool cleaning robots are cleaning devices developed to meet the needs of pool cleaning and can clean pools. Currently, when pool cleaning equipment operates in pools, it encounters the problem of filter unit clogging. When the filter unit is clogged, the liquid flowing out of the filter unit will decrease or even stop, resulting in insufficient water spray from the spray mechanism, causing the equipment to malfunction and lose some of its mobility.

[0003] Existing pool cleaning robots have gravity doors attached to some of the water outlets. When the pool cleaning robot is within a certain angle range, the gravity door can move away from the water outlet by its own weight, thereby alleviating the problem of filter unit clogging. However, the gravity door is too dependent on gravity design. If the cleaning equipment is outside the specific angle range, such as when the pool cleaning robot is walking horizontally, the gravity door cannot be opened. Therefore, when the filter basket is clogged, it cannot effectively alleviate the clogging, and the water spraying effect is weakened. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a filtration device and a water tank cleaning equipment. In this utility model, the water pressure inside the main body can act on the second filter component, causing the second filter component to separate from the guide surface, thereby changing the filter aperture. This allows at least part of the water to flow out through the guide surface without passing through the second filter component, thus alleviating the blockage of the main body, increasing the water flow rate, and optimizing the water spraying effect.

[0005] This utility model embodiment provides a filtration device applied to a water tank cleaning device, the filtration device comprising:

[0006] The main body, wherein the main body forms a cavity;

[0007] A first filter assembly is disposed on the main body and communicates with the cavity;

[0008] A flow guide surface is disposed on the main body and communicates with the cavity;

[0009] The second filter assembly is disposed on the main body and located on the side of the flow guide surface away from the cavity;

[0010] The second filtering component includes a closed state and an open state;

[0011] In the closed state, the second filter component covers the guide surface, and at least a portion of the water flows out after passing through the guide surface and the second filter component in sequence.

[0012] In the open state, the second filter component is separated from the guide surface, and at least part of the water flows out after passing through the guide surface without passing through the second filter component.

[0013] Furthermore, the main body is provided with a pivot connection, through which the second filter component is pivotally connected to the main body, and the pivot connection is provided with a damping element.

[0014] Furthermore, the damping element includes a rotating shaft and a torsion spring sleeved on the rotating shaft.

[0015] Furthermore, in the closed state, the second filter assembly is covered by the elastic force provided by the damping element to cover the flow guide surface; in the open state, the second filter assembly overcomes the elastic force of the damping element and separates from the flow guide surface.

[0016] Furthermore, the pore size on the first filter component is smaller than the pore size on the guide surface.

[0017] Furthermore, the pore size on the second filter assembly is smaller than the pore size on the flow guide surface.

[0018] Furthermore, the second filter component is symmetrically arranged on both sides of the main body.

[0019] Furthermore, the first filter component is detachably connected to the main body.

[0020] Furthermore, it also includes an adjustment component, which is fixedly mounted on the main body;

[0021] Under the action of external force, the adjustment component switches between a locked state and an unlocked state;

[0022] When the adjusting component is in the locked state, the adjusting component restricts the rotation of the second filter component.

[0023] This utility model also protects a pool cleaning device, the pool cleaning device comprising:

[0024] A walking mechanism is used to drive the pool cleaning equipment to move on the support surface;

[0025] A water spray mechanism is used to provide water flow force for the water tank cleaning equipment;

[0026] A filtration device is used to filter the water flow entering the water tank cleaning equipment;

[0027] The filtration device is the filtration device described above.

[0028] Implementing the embodiments of this utility model has the following beneficial effects:

[0029] The main body of this invention is provided with a flow guide surface, and a second filter component is provided on the side of the flow guide surface away from the cavity. When the main body becomes blocked, the water pressure inside the main body can act on the second filter component, causing the second filter component to separate from the flow guide surface, thereby changing the filter aperture. This allows at least part of the water to flow out through the flow guide surface without passing through the second filter component, thus alleviating the blockage of the main body, increasing the water flow rate, and optimizing the water spraying effect. More importantly, regardless of the working position of the main body, as long as the main body becomes blocked, the internal water pressure inside the main body can act on the second filter component, thereby ensuring that the blockage problem can be alleviated regardless of the position of the main body, thus improving the user experience. Attached Figure Description

[0030] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of this utility model. Those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0031] Figure 1 This is an isometric view of the filtration device according to an embodiment of the present invention;

[0032] Figure 2 This is a left view of the filtering device according to an embodiment of the present invention;

[0033] Figure 3 This is a structural diagram of the main body and the guide surface of an embodiment of the present utility model;

[0034] Figure 4 This is a structural diagram of the housing according to an embodiment of the present utility model.

[0035] The corresponding reference numerals in the figure are as follows:

[0036] 1-Main body; 2-Guide surface; 3-Second filter assembly; 4-Rotating shaft; 5-Connecting shaft; 6-Rotating component; 11-Housing shell; 12-Bottom cover; 111-Receiving cavity; 112-Opening. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0038] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0039] See appendix Figure 1-4 This embodiment provides a filtration device applied to a water tank cleaning device. The filtration device includes: a main body 1, the main body 1 having a cavity 111; a first filter assembly disposed on the main body 1 and communicating with the cavity 111; a flow guide surface 2 disposed on the main body 1 and communicating with the cavity 111; and a second filter assembly 3 disposed on the main body 1 and located on the side of the flow guide surface 2 away from the cavity 111. The second filter assembly 3 includes a closed state and an open state. In the closed state, the second filter assembly 3 covers the flow guide surface 2, and at least a portion of the water flows out after passing through the flow guide surface 2 and the second filter assembly 3 in sequence. In the open state, the second filter assembly 3 is separated from the flow guide surface 2, and at least a portion of the water flows out after passing through the flow guide surface 2 without passing through the second filter assembly 3.

[0040] It should be noted that: In this embodiment, a guide surface 2 is provided on the main body 1, and a second filter component 3 is provided on the side of the guide surface 2 away from the cavity 111. When the main body 1 is blocked, the water pressure inside the main body 1 can act on the second filter component 3, causing the second filter component 3 to separate from the guide surface 2, thereby changing the filter aperture. This allows at least part of the water flow to flow out through the guide surface 2 without passing through the second filter component 3, thus alleviating the blockage of the main body, increasing the water flow rate, and optimizing the water spraying effect. More importantly, regardless of the working position of the main body 1, as long as the main body 1 is blocked, the internal water pressure inside the main body 1 can act on the second filter component 3, thereby ensuring that the blockage of the main body 1 can be alleviated in any position, thus improving the user experience.

[0041] In this embodiment, a first filter assembly and a flow guide surface 2 are spaced apart on the side wall of the main body 1. A second filter assembly 3 is rotatably disposed on the side of the flow guide surface 2 away from the cavity 111 of the main body 1. The first filter assembly is detachably disposed on the side wall of the main body 1 or fixedly disposed on the side wall of the main body 1. The flow guide surface 2 is detachably disposed on the side wall of the main body 1 or fixedly disposed on the side wall of the main body 1.

[0042] In this embodiment, the second filter component 3 is arranged in pairs with the guide surface 2, that is, each guide surface 2 is provided with a second filter component 3 on the side away from the cavity 111. When the second filter component 3 is in the closed state, the water inside the main body 1 flows out through the second filter component 3 after passing through the guide surface 2; when the second filter component 3 is in the open state, at least part of the water inside the main body 1 flows out through the guide surface 2 without passing through the second filter component 3.

[0043] In this embodiment, the second filter component 3 completely covers the flow guide surface 2. If the second filter component 3 does not completely cover the flow guide surface 2, when the second filter component 3 is in the closed state, the liquid in the main body 1 will flow out directly from the flow guide surface 2 that is not covered by the second filter component 3. This will result in the water pressure in the main body 1 not being greater than the elastic force generated by the damping element when the main body 1 is blocked. This will result in the second filter component 3 not being able to open, thus failing to alleviate the blockage problem of the main body 1.

[0044] In this embodiment, filter holes are provided on the first filter component, the second filter component 3, and the flow guiding surface 2.

[0045] Furthermore, the first filter component, the second filter component 3, and the flow guide surface 2 are all provided with a number of filter holes at even intervals.

[0046] In this embodiment, when the main body 1 is blocked, the guide surface 2 and the second filter component 3 form a non-zero angle, and the sewage in the cavity 111 flows out through the guide surface 2; when the main body 1 is unobstructed, the guide surface 2 and the second filter component 3 are arranged in parallel, and the sewage in the cavity 111 flows out through the filter holes of the guide surface 2 and the filter holes of the second filter component 3 in sequence.

[0047] In this embodiment, when the guide surface 2 and the second filter component 3 are arranged in parallel, there is a gap between the guide surface 2 and the second filter component 3, that is, the second filter component 3 abuts against the side wall of the main body 1.

[0048] In this embodiment, the main body 1 also includes a housing 11 with openings at both ends and a bottom cover 12; the open end of one side of the housing 11 is detachably connected to the bottom cover 12.

[0049] In this embodiment, a plurality of openings are provided at intervals on the side wall of the housing 11 along the circumference of the housing 11. The first filter assembly and the flow guiding surface 2 are provided at intervals at the openings, and the openings that cooperate with them are detachable or fixedly connected.

[0050] Specifically, the guide surface 2 is set at the openings that are positioned opposite each other, so that the two sides of the main body 1 can be relieved of blockage at the same time.

[0051] In this embodiment, a plurality of openings 112 are provided on the side wall of the housing 11. The openings 112 communicate with the cavity 111. The guide surface 2 is detachably or fixedly provided at the opening 112, and the guide surface 2 is sealed to the opening 112. The first filter assembly is also detachably or fixedly provided at the opening 112.

[0052] In this embodiment, the area of ​​the second filter component 3 is 30%-40% of the area of ​​the side wall, and the area of ​​the flow guiding surface 2 is 30%-40% of the area of ​​the side wall. This arrangement ensures that when the main body 1 is blocked, the second filter component 3 is far away from the flow guiding surface 2, and the flow guiding surface has sufficient flow guiding area. This ensures that the blockage problem of the main body 1 is quickly relieved and the user experience is improved.

[0053] Specifically, the area of ​​the second filter component 3 is 30%-33%, 30%-35%, 33%-40%, 35%-40%, or 38%-40% of the area of ​​the sidewall, and the area of ​​the guide surface 2 is 30%-33%, 30%-35%, 33%-40%, 35%-40%, or 38%-40% of the area of ​​the sidewall.

[0054] In this embodiment, the filter holes on the second filter component 3 occupy 80-95% of the area of ​​the second filter component 3, and the filter holes on the guide surface 2 occupy 80-95% of the area of ​​the guide surface 2.

[0055] In some possible embodiments, the main body 1 is provided with a pivot connection, through which the second filter assembly 3 is pivotally connected to the main body 1. A damping element is provided at the pivot connection. This pivot connection allows the second filter assembly 3 to rotate relative to the main body 1, enabling water pressure within the main body 1 to act on the second filter assembly 3, thus alleviating clogging of the main body 1. More importantly, the damping element provides a force towards the main body 1 to the second filter assembly 3, ensuring that the second filter assembly 3 can only open when the water pressure inside the main body 1 exceeds the force provided by the damping element. This prevents the second filter assembly 3 from opening prematurely when the main body 1 is not clogged. If the second filter assembly 3 opens prematurely, the guide surface 2 will become clogged. When the main body 1 is clogged, it is impossible to alleviate the clogging by driving the second filter assembly 3 away from the guide surface 2, which would affect the filtration capacity of the main body 1 and reduce the user experience.

[0056] In this embodiment, a pivot connection is provided on the side wall of the main body 1. This arrangement ensures that the second filter component 3 can rotate relative to the main body 1 and abut against the side wall of the main body 1, thereby optimizing the overall size.

[0057] In this embodiment, the structure of the damping component is not limited, as long as the main body 1 is rotatably connected to the second filter assembly 3 through the damping component; after the main body 1 and the second filter assembly 3 are rotatably connected, the second filter assembly 3 can generate a force to move toward the cavity 111 under the action of the damping component.

[0058] In some possible embodiments, the damping element includes a rotating shaft 4 and a torsion spring sleeved on the rotating shaft 4. By setting the structure as described above, it is possible to simplify the structure of the damping element, reduce installation costs, and simplify the operation process while ensuring that the second filter component 3 is provided with a force directed toward the guide surface 2.

[0059] In this embodiment, the rotating shaft 4 is fixedly connected to the second filter assembly 3, and the second filter assembly 3 is rotatably connected to the main body 1 through the rotating shaft 4. The two ends of the torsion spring abut against the second filter assembly 3 and the main body 1 respectively, so as to restrict the second filter assembly 3 from rotating away from the guide surface 2.

[0060] Specifically, a mounting hole is provided at the pivot connection, the end of the rotating shaft 4 extends into the mounting hole, and the rotating shaft 4 can rotate relative to the mounting hole.

[0061] In some possible embodiments, in the closed state, the second filter assembly 3 is covered by the elastic force provided by the damping element to cover the guide surface 2. In the open state, the second filter assembly 3 overcomes the elastic force of the damping element and separates from the guide surface 2. When the second filter assembly 3 is in the closed state, it is covered by the elastic force provided by the damping element to cover the guide surface 2. In the open state, due to the water pressure inside the main body 1, the second filter assembly 3 overcomes the elastic force of the damping element and separates from the guide surface 2. In this way, the second filter assembly 3 is separated from the guide surface 2, thereby changing the filter aperture and allowing at least part of the water to flow out through the guide surface 2 without passing through the second filter assembly 3, thereby alleviating the blockage of the main body.

[0062] In this embodiment, the elastic force provided by the damping component is set according to the actual situation. As long as the force exerted by the water pressure inside the main body 1 on the second filter component 3 is greater than the elastic force provided by the damping component when the main body 1 is blocked, it can be ensured that the second filter component 3 can switch from the closed state to the open state when the main body 1 is blocked.

[0063] In some possible embodiments, the pore size on the first filter component is smaller than the pore size on the guide surface 2. By setting the pore size on the first filter component to be smaller than the pore size on the guide surface 2, it can be ensured that if the second filter component 3 is opened in the case of blockage inside the main body 1, the water will flow out from the guide surface 2, thereby alleviating the blockage inside the main body 1.

[0064] In this embodiment, different filter pore sizes can be selected for the first filter component according to the user's needs, which can improve the user experience.

[0065] In some possible embodiments, the pore size on the second filter component 3 is smaller than the pore size on the guide surface 2. This arrangement ensures that the pore size can be increased when the second filter component 3 is moved away from the guide surface 2, thereby alleviating the clogging problem of the main body 1, increasing the water flow rate, and optimizing the water spraying effect.

[0066] In this embodiment, the filter aperture on the guide surface 2 is 1.1-2 times the filter aperture on the second filter component 3. This setting ensures that the guide surface 2 can quickly alleviate the blockage problem of the main body 1 after the second filter component 3 switches from the closed state to the open state.

[0067] Specifically, the filter aperture on the guide surface 2 is 1.1-1.3 times, 1.1-1.5 times, 1.1-1.8 times, 1.1-2 times, 1.3-1.5 times, 1.5-1.8 times, or 1.8-2 times the filter aperture on the second filter component 3.

[0068] In some possible embodiments, the second filter component 3 is symmetrically arranged on both sides of the main body 1. By symmetrically arranging the second filter component 3 on both sides of the main body 1, the clogging problem of the main body 1 can be alleviated simultaneously on both sides of the main body 1, thereby quickly resolving the clogging of the main body 1 and improving the user experience.

[0069] In some other possible embodiments, the second filter component 3 is disposed on one side of the main body 1.

[0070] In other possible embodiments, a second filter component 3 is provided on each side of the main body 1.

[0071] In some possible embodiments, the first filter component is detachably connected to the main body 1. This arrangement facilitates the disassembly of the first filter component and allows for the replacement of the first filter component with different filter pore sizes according to user needs, thereby improving its adaptability.

[0072] In some possible embodiments, an adjustment component is also included, which is fixedly mounted on the main body 1. Under the action of an external force, the adjustment component switches between a locked state and an unlocked state. When the adjustment component is in the locked state, it restricts the rotation of the second filter component 3. By changing the state of the adjustment component, it is possible to restrict the rotation of the second filter component 3. When the adjustment component is in the locked state, it can restrict the rotation of the second filter component 3, thereby achieving single filtration, that is, ensuring that the main body 1 achieves fine filtration. When the adjustment component is in the unlocked state, the second filter component 3 can rotate relative to the guide surface 2 under the action of an external force, thus achieving both fine and coarse filtration. It can be seen that the user can achieve different filtration methods by setting the adjustment component, thereby improving the user experience.

[0073] In this embodiment, a connecting shaft 5 and a rotating member 6 disposed on the connecting shaft 5 are included. The connecting shaft 5 is fixedly disposed on the main body 1, and the rotating member 6 is rotatably connected to the connecting shaft 5. When the adjusting component is in the locked state, the rotating member 6 abuts against the second filter component 3 to restrict the movement of the second filter component 3.

[0074] In this embodiment, the structure and size of the rotating member 6 are not limited, as long as the rotating member 6 can abut against the second filter component 3 when it is rotated to a certain angle.

[0075] In this embodiment, when the user does not want to increase the filtration capacity of the main body 1 by opening the second filter component 3, the rotating part 6 is rotated 90° so that the rotating part 6 abuts against the second filter component 3 to restrict the rotation of the second filter component 3 relative to the guide surface 2. At this time, the main body 1 is blocked, and the second filter component 3 will not open because the main body 1 is blocked. When the main body 1 is blocked, the user is reminded to clean the main body 1.

[0076] In this embodiment, the filtration levels of the filter holes are divided into fine filtration and coarse filtration. Users can set the filter holes of the first filter component to fine filtration or coarse filtration according to their own needs. When the filtration level of the filter holes of the first filter component is fine filtration, the filtration level of the entire body 1 is fine filtration. When the body 1 is blocked, the second filter component 3 will open because the water pressure inside the body 1 will overcome the force of the torsion spring. After opening, the filtration level of the area not covered by the second filter component 3 is coarse filtration, and the water will flow out from there. Of course, the filtration capacity of the body 1 will decrease at this time, but it can alleviate the blockage of the body 1.

[0077] In some other possible embodiments, when the filtration level of the filter holes of the first filter component is coarse filtration, the filtration level of the entire body 1 is coarse filtration. When the body 1 is blocked, the second filter component 3 will open because the water pressure inside the body 1 will overcome the force of the torsion spring. After opening, the filtration capacity of the area not covered by the second filter component 3 is greater than the filtration capacity of coarse filtration, and the water will flow out from that outlet. Of course, the filtration capacity of the body 1 will decrease at this time, but it can alleviate the blockage of the body 1.

[0078] This utility model also protects a pool cleaning device, which includes: a walking mechanism for driving the pool cleaning device to walk on a support surface; a water spraying mechanism for providing water flow force to the pool cleaning device; and a filtration device for filtering the water flow entering the pool cleaning device. The filtration device is as described above. In this embodiment, the pool cleaning device, by setting the above-mentioned filtration device, ensures that when the main body 1 becomes blocked, the internal water pressure of the main body 1 can act on the second filter component 3, causing the second filter component 3 to separate from the guide surface 2, thereby changing the filter aperture. This allows at least part of the water flow to exit through the guide surface 2 without passing through the second filter component 3, thus alleviating the blockage of the main body, increasing the water flow rate, optimizing the spraying effect, ensuring the normal operation of the pool cleaning device, and preventing the pool cleaning device from losing some of its mobility. More importantly, regardless of the working position of the main body 1, as long as the main body 1 becomes blocked, the internal water pressure inside the main body 1 can act on the second filter component 3, thereby ensuring that the blockage problem of the main body 1 can be alleviated regardless of its position, thus improving the user experience.

[0079] Although the present invention has been described through optional embodiments, the present invention is not limited to the embodiments described herein, and includes various changes and variations without departing from the scope of the present invention.

[0080] In this document, the directional terms such as front, back, top, and bottom are defined according to the positions of the components in the accompanying drawings and the positions between the components, and are only used for clarity and convenience in expressing the technical solution. It should be understood that the use of these directional terms should not limit the scope of protection claimed by this utility model.

[0081] Where there is no conflict, the above embodiments and features described herein can be combined with each other.

[0082] The above-disclosed embodiment is merely a preferred embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A filtration device, used in pool cleaning equipment, characterized in that, The filtration device includes: The main body (1) has a cavity (111) formed therein; The first filter assembly is disposed on the main body (1) and communicates with the cavity (111); A flow guide surface (2) is disposed on the main body (1) and communicates with the cavity (111); The second filter assembly (3) is disposed on the main body (1) and located on the side of the guide surface (2) away from the cavity (111); The second filter component (3) includes a closed state and an open state; In the closed state, the second filter component (3) covers the guide surface (2), and at least part of the water flows out after passing through the guide surface (2) and the second filter component (3) in sequence; In the open state, the second filter component (3) is separated from the guide surface (2), and at least part of the water flows out after passing through the guide surface (2) without passing through the second filter component (3).

2. The filtration device according to claim 1, characterized in that, The main body (1) is provided with a pivot connection, and the second filter component (3) is pivotally connected to the main body (1) through the pivot connection. The pivot connection is provided with a damping element.

3. The filtration device according to claim 2, characterized in that, The damping element includes a rotating shaft (4) and a torsion spring sleeved on the rotating shaft (4).

4. The filtration device according to claim 2, characterized in that, In the closed state, the second filter assembly (3) is covered by the flow guide surface (2) by the elastic force provided by the damping element. In the open state, the second filter assembly (3) overcomes the elastic force of the damping element and separates from the flow guide surface (2).

5. The filtration device according to any one of claims 1-4, characterized in that, The pore size on the first filter component is smaller than the pore size on the guide surface (2).

6. The filtration device according to any one of claims 1-4, characterized in that, The pore size on the second filter component (3) is smaller than the pore size on the guide surface (2).

7. The filtration device according to any one of claims 1-4, characterized in that, The second filter component (3) is symmetrically arranged on both sides of the main body (1).

8. The filtration device according to any one of claims 1-4, characterized in that, The first filter component is detachably connected to the main body (1).

9. The filtration device according to any one of claims 1-4, characterized in that, It also includes an adjustment component, which is fixedly mounted on the main body (1); Under the action of external force, the adjustment component switches between a locked state and an unlocked state; When the adjustment component is in the locked state, the adjustment component restricts the rotation of the second filter component (3).

10. A water tank cleaning device, characterized in that, The water tank cleaning equipment includes: A walking mechanism is used to drive the pool cleaning equipment to move on the support surface; A water spray mechanism is used to provide water flow force for the water tank cleaning equipment; A filtration device is used to filter the water flow entering the water tank cleaning equipment; The filtering device is the filtering device as described in any one of claims 1-9.

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