Water tank cover, water tank and cleaning tool

Abstract

The invention is suitable for the technical field of cleaning appliances. The invention discloses a water tank cover, a water tank and a cleaning tool, the water tank cover comprises a tank body provided with a clear water area and a sewage area, the water tank is used for a mopping and sweeping integrated cleaning tool, the water tank cover comprises a cover body, and the cover body is provided with a sewage tank water inlet, a clear water tank water outlet, a sewage tank extraction opening and a clear water tank air inlet; the clean water tank water outlet sends clean water in the clean water area out of the tank body, the clean water tank air inlet is communicated with the clean water tank water outlet and the clean water area, the sewage tank extraction opening is communicated with a negative pressure device, a splash-proof isolation mechanism for preventing liquid from entering is arranged on the sewage tank extraction opening, and the negative pressure device pumps sewage into the sewage area through the sewage tank water inlet. A water film can be formed on the surface of the splash-proof isolation mechanism, so that clear water is prevented from directly entering the exhaust opening of the sewage tank through the splash-proof isolation mechanism, and noise generated when liquid and air are exhausted in a pipeline is avoided.

Description

[0001] This application is a divisional application of Chinese patent application No. 202210228659.7, and invention name is “A water tank cover, water tank and cleaning tool for a mopping and sweeping cleaning tool”, the contents of which are incorporated herein by reference. Technical Field

[0002] The invention relates to the technical field of cleaning, and in particular to a water tank cover, a water tank and a cleaning tool. Background Art

[0003] Existing mopping and sweeping integrated cleaning tools require clean water when in use, and the clean water is usually delivered to the cleaning surface or the drum surface by a water pump from a clean water tank provided on the cleaning tool. However, the cleaning tool needs to be moved during use, and since some stains cannot be completely cleaned at one time, it is necessary to mop and sweep the same area multiple times, such as moving back and forth to mop and sweep, which causes the liquid level in the clean water tank to fluctuate (the clean water tank is usually a closed structure), causing water to intermittently enter the water pump inlet, causing air and liquid to mix at the water pump inlet, and generating a large noise when the liquid is discharged. Summary of the invention

[0004] The main technical problem solved by the present invention is to provide a water tank cover, a water tank and a cleaning tool for a mopping and sweeping all-in-one cleaning tool, wherein the water tank cover can avoid the noise generated by the inhalation of liquid due to the shaking of the water tank liquid level during use.

[0005] In order to solve the above technical problems, the present invention provides a water tank cover for a mopping and sweeping cleaning tool, the water tank cover for the mopping and sweeping cleaning tool comprises a cover body, the cover body is provided with a sewage tank water inlet, a clean water tank water outlet and a sewage tank air exhaust port, and a clean water tank air inlet, the sewage tank air exhaust port is provided with a splash-proof isolation mechanism to prevent liquid from entering the sewage tank air exhaust port.

[0006] Furthermore, the splash-proof isolation mechanism comprises a splash-proof cover, the side wall and the bottom of the splash-proof cover are screen structures.

[0007] Furthermore, the splash-proof isolation mechanism comprises a flat screen.

[0008] Furthermore, the splash-proof isolation mechanism comprises a splash-proof cover in the shape of a trumpet or a spherical crown, and the splash-proof cover is provided with a plurality of discharge holes.

[0009] Furthermore, the discharge hole is in a trumpet shape, and the smaller end of the trumpet-shaped discharge hole is close to the air suction port of the sewage tank.

[0010] Furthermore, the density of the discharge holes at the center of the splash shield is greater than that at the middle.

[0011] Furthermore, the distance between the screen and the air suction port of the sewage tank is not less than 1CM.

[0012] Furthermore, the screen is flexible.

[0013] Furthermore, a leak-proof structure is provided on the contact surface between the cover and the water tank.

[0014] Furthermore, the anti-leakage structure includes a sealing ring.

[0015] Furthermore, a variable airbag is provided in the sealing ring.

[0016] Furthermore, the variable airbag is located at the outermost side of the sealing ring.

[0017] The present invention provides a water tank, which includes a tank body provided with a sewage area and a clean water area and a water tank cover fixed to the tank body to form a sealed water holding chamber, the water tank cover includes a cover body, on which a sewage tank water inlet, a clean water tank water outlet and a sewage tank air suction port are provided, as well as a clean water tank air inlet, and the sewage tank air suction port is provided with an anti-splashing isolation mechanism for preventing liquid from entering the sewage tank air suction port.

[0018] Furthermore, the splash-proof isolation mechanism comprises a splash-proof cover, the side wall and the bottom of the splash-proof cover are screen structures.

[0019] Furthermore, the splash-proof isolation mechanism comprises a flat screen.

[0020] Furthermore, the splash-proof isolation mechanism comprises a splash-proof cover in the shape of a trumpet or a spherical crown, and the splash-proof cover is provided with a plurality of discharge holes.

[0021] Furthermore, the discharge hole is in a trumpet shape, and the smaller end of the trumpet-shaped discharge hole is close to the air suction port of the sewage tank.

[0022] Furthermore, the density of the discharge holes at the center of the splash shield is greater than that at the middle.

[0023] Furthermore, the distance between the screen and the air suction port of the sewage tank is not less than 1CM.

[0024] Furthermore, the screen is flexible.

[0025] Furthermore, a leak-proof structure is provided on the contact surface between the cover and the water tank.

[0026] Furthermore, the anti-leakage structure includes a sealing ring.

[0027] Furthermore, a variable airbag is provided in the sealing ring.

[0028] Furthermore, the variable airbag is located at the outermost side of the sealing ring.

[0029] The present invention provides a cleaning tool, which includes a water tank, which includes a tank body and a water tank cover fixed to the tank body to form a sealed water holding chamber, the water tank cover includes a cover body, and the cover body is provided with a sewage tank water inlet, a clean water tank water outlet and a sewage tank air suction port, and a clean water tank air inlet, and the sewage tank air suction port is provided with an anti-splash isolation mechanism to prevent liquid from entering the sewage tank air suction port.

[0030] Furthermore, the splash-proof isolation mechanism comprises a splash-proof cover, the side wall and the bottom of the splash-proof cover are screen structures.

[0031] Furthermore, the splash-proof isolation mechanism comprises a flat screen.

[0032] Furthermore, the splash-proof isolation mechanism comprises a splash-proof cover in the shape of a trumpet or a spherical crown, and the splash-proof cover is provided with a plurality of discharge holes.

[0033] Furthermore, the discharge hole is in a trumpet shape, and the smaller end of the trumpet-shaped discharge hole is close to the air suction port of the sewage tank.

[0034] Furthermore, the density of the discharge holes at the center of the splash shield is greater than that at the middle.

[0035] Furthermore, the distance between the screen and the air suction port of the sewage tank is not less than 1CM.

[0036] Furthermore, the screen is flexible.

[0037] Furthermore, a leak-proof structure is provided on the contact surface between the cover and the water tank.

[0038] Furthermore, the anti-leakage structure includes a sealing ring.

[0039] Furthermore, a variable airbag is provided in the sealing ring.

[0040] Furthermore, the variable airbag is located at the outermost side of the sealing ring.

[0041] The present invention discloses a water tank cover, a water tank and a cleaning tool for a mopping and sweeping cleaning tool, wherein the water tank cover for the mopping and sweeping cleaning tool comprises a cover body, on which a sewage tank water inlet, a clean water tank water outlet and a sewage tank air outlet are provided, and a clean water tank air inlet is provided, and the sewage tank air outlet is provided with an anti-splashing isolation mechanism for preventing liquid from entering the sewage tank air outlet. Since an anti-splashing isolation mechanism for preventing liquid from entering the sewage tank air outlet is provided between the sewage tank air outlet and the water tank liquid level, the anti-splashing isolation mechanism adopts a screen structure, and the smaller holes on the screen structure can be used to form a water film through the surface tension of water, thereby preventing clean water from directly passing through the anti-splashing isolation mechanism and reaching the sewage tank air outlet. The noise generated by the presence of liquid and air in the pipeline during exhaust is avoided. The screen is made of flexible material, such as gauze, so that it can be used to have good deformation ability during use and better adapt to the changes in the liquid level in the clean water tank. At the same time, a splash shield in the shape of a trumpet or a spherical crown is used, and the splash shield is provided with a plurality of discharge holes, and the discharge holes are trumpet-shaped, and the smaller end of the trumpet-shaped discharge hole is close to the side of the sewage tank air suction port, so that liquid can be better prevented from entering the splash shield, and even if it enters, it can be quickly discharged. The density of the discharge holes on the center position of the splash shield is greater than the density in the middle position, so that it is more difficult for liquid to enter the sewage tank air suction port, and at the same time, it is convenient to quickly discharge the liquid after entering the splash shield. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the description only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 It is a schematic diagram of the three-dimensional structure of a water tank cover embodiment.

[0044] Figure 2 It is a schematic structural diagram of another viewing angle of a water tank cover embodiment.

[0045] Figure 3 It is a structural schematic diagram of another viewing angle of the water tank cover embodiment.

[0046] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure along the AA direction.

[0047] Figure 5 for Figure 4 The enlarged schematic diagram of the sealing ring structure with variable airbag in part B.

[0048] Figure 6 for Figure 4Part B in the middle is an enlarged schematic diagram of the structure of the sealing ring with a variable airbag when it is working.

[0049] Figure 7 Another embodiment of the water tank cover is Figure 3 Schematic diagram of the cross-sectional structure along the AA direction.

[0050] Figure 8 for Figure 7 Enlarged schematic diagram of the middle splash shield structure.

[0051] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0052] The claims of the present invention are further described in detail below in conjunction with specific embodiments and drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments proposed by ordinary technicians in this field before making creative work also fall within the scope of protection of the present invention.

[0053] It should be understood that, in the description of the embodiments of the present invention, all directional indication terms, such as "up", "down", "left", "right", "front", "back", etc., indicate the orientation or position relationship based on the orientation, position relationship shown in the drawings or the orientation or position relationship in which the invented product is usually placed when in use, which is only for the convenience of simplifying the description of the present invention, and does not expressly or imply that the device, element or component referred to must have a specific orientation and a specific orientation structure, and should not be understood as a limitation on the present invention. It is only used to explain the relative position relationship, movement, etc. between the components shown in the drawings. When the specific posture changes, the directional indication may also change accordingly.

[0054] In addition, ordinal numbers such as "first" and "second" in the present invention are only used for the purpose of distinction, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. The features defined as "first" and "second" can explicitly or implicitly indicate at least one of the technical features. In the description of the present invention, "multiple" means at least two, that is, two or more, unless otherwise clearly defined; "at least one" means one or one and more.

[0055] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, the positional relationship between components can be relatively fixed, or the components can be physically fixedly connected; they can be detachably connected or integrated; they can be mechanically connected or electrically connected; they can be directly connected or indirectly connected through an intermediate medium or component; they can be internally connected between two elements or interact with each other. Unless otherwise clearly defined in the specification, other interpretations may not achieve the corresponding functions or effects. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] The controller and control circuit involved in the present invention are conventional control technologies or units of those skilled in the art. For example, the control circuit of the controller can be realized by ordinary technicians in the field using existing technologies, such as simple programming. If the software or program involved in the control result is not described in detail, it belongs to the use of existing technologies or conventional technologies of ordinary technicians in the field. The power supply also uses the existing technologies in the field, and the main technical point of the present invention is to improve the mechanical device, so the present invention will not describe the specific circuit control relationship and circuit connection in detail.

[0057] The disclosure of the present invention provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described in the present invention. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0058] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0059] like Figure 1-Figure 4 As shown, the present invention provides an embodiment of a water tank cover for a mopping and sweeping cleaning tool.

[0060] The water tank cover of the mopping and sweeping cleaning tool comprises a cover body 1, on which a sewage tank water inlet 13, a clean water tank water outlet 12, a sewage tank air suction port 11 and a clean water tank air inlet 15 are provided, and the sewage tank air suction port 11 is provided with a splash-proof isolation mechanism for preventing liquid from entering the sewage tank air suction port 11.

[0061] Specifically, the splash-proof isolation mechanism comprises a splash-proof cover, the sidewall and the bottom of which are screen structures 16. The splash-proof isolation mechanism comprises a flat screen.

[0062] The smaller holes on the screen structure 16 can form a water film through the surface tension of water, preventing clean water from directly passing through the splash-proof isolation mechanism and reaching the air outlet of the sewage tank. This can avoid the noise caused by the presence of liquid and air in the pipeline during exhaust. The screen is made of flexible material, such as gauze, so that it can be used during use to better adapt to the changes in the liquid level in the clean water tank.

[0063] like Figure 7 and 8 As shown, the splash-proof isolation mechanism can be a splash-proof cover 16 including a trumpet or a spherical crown, and the splash-proof cover 16 is provided with a plurality of discharge holes 161. The splash-proof cover 16 of this shape can increase the difficulty of liquid entering, while being able to quickly gather and discharge. The discharge hole 161 is preferably trumpet-shaped, and the smaller end of the trumpet-shaped discharge hole 161 is close to the side of the sewage tank suction port, which increases the difficulty of liquid entering the splash-proof cover 16.

[0064] In order to further increase the difficulty of liquid entering the splash shield 16 while enabling rapid discharge of the liquid, the density of the discharge holes 161 at the center of the splash shield 16 is greater than that at the middle.

[0065] As required, the distance between the screen or splash shield 16 and the sewage tank suction port 11 is not less than 1 cm, which has a better effect of isolating the liquid.

[0066] According to the needs, the contact surface between the cover body 1 and the water tank is provided with a leak-proof structure 14. To avoid leakage of liquid during use, the leak-proof structure 14 includes a sealing ring. A variable airbag 17 is provided inside the sealing ring, and the variable airbag 17 is located at the outermost side of the sealing ring. In a normal state, the variable airbag 17 is at normal pressure, and the shape of the variable airbag 17 is stable. Figure 5 When the water tank 1 is used, air needs to be sucked to form a negative pressure in the water tank 1, so that the variable airbag 17 under normal pressure bulges outwards, as shown in FIG. Figure 6As shown, the sealed interface is made tighter, and the variable airbag 17 also expands the sealing contact surface, thereby forming a better leak-proof effect. Moreover, when opening the water tank cover 1, as long as the water tank is kept at normal pressure, the water tank cover can be easily separated from the tank body, avoiding the difficulty of disassembly after sealing by constant tight fit. The variable airbag is made of a material with greater deformation ability, such as rubber.

[0067] As required, the variable airbag 17 is located at the outermost side of the sealing ring, so that after being inflated, it can form a better compression effect with the sealing surface and form a larger sealing surface.

[0068] The present invention provides a water tank, which includes a tank body provided with a sewage area and a clean water area and a water tank cover fixed to the tank body to form a sealed water holding chamber, the water tank cover includes a cover body 1, the cover body 1 is provided with a sewage tank water inlet 13, a clean water tank water outlet 12 and a sewage tank air suction port 11, and a clean water tank air inlet 15, the sewage tank air suction port 11 is provided with a splash-proof isolation mechanism for preventing liquid from entering the sewage tank air suction port 11.

[0069] Specifically, the splash-proof isolation mechanism comprises a splash-proof cover, the sidewall and the bottom of which are screen structures 16. The splash-proof isolation mechanism comprises a flat screen.

[0070] The smaller holes on the screen structure 16 can form a water film through the surface tension of water, preventing clean water from directly passing through the splash-proof isolation mechanism and reaching the air outlet of the sewage tank. This can avoid the noise caused by the presence of liquid and air in the pipeline during exhaust. The screen is made of flexible material, such as gauze, so that it can be used during use to better adapt to the changes in the liquid level in the clean water tank.

[0071] like Figure 7 and Figure 8 As shown, the splash-proof isolation mechanism can be a splash-proof cover 16 including a trumpet or a spherical crown, and the splash-proof cover 16 is provided with a plurality of discharge holes 161. The splash-proof cover 16 of this shape can increase the difficulty of liquid entering, while being able to quickly gather and discharge. The discharge hole 161 is preferably trumpet-shaped, and the smaller end of the trumpet-shaped discharge hole 161 is close to the side of the sewage tank suction port, which increases the difficulty of liquid entering the splash-proof cover 16.

[0072] In order to further increase the difficulty of liquid entering the splash shield 16 while enabling rapid discharge of the liquid, the density of the discharge holes 161 at the center of the splash shield 16 is greater than that at the middle.

[0073] As required, the distance between the screen or splash shield 16 and the sewage tank suction port 11 is not less than 1 cm, which has a better effect of isolating the liquid.

[0074] According to the needs, the contact surface between the cover body 1 and the water tank is provided with a leak-proof structure 14. To avoid leakage of liquid during use, the leak-proof structure 14 includes a sealing ring. A variable airbag 17 is provided inside the sealing ring, and the variable airbag 17 is located at the outermost side of the sealing ring. In a normal state, the variable airbag 17 is at normal pressure, and the shape of the variable airbag 17 is stable. Figure 5 When the water tank 1 is used, air needs to be sucked to form a negative pressure in the water tank 1, so that the variable airbag 17 under normal pressure bulges outwards, as shown in FIG. Figure 6 As shown, the sealing interface is made tighter, and the variable airbag 17 also expands the sealing contact surface, thereby forming a better leak-proof effect. Moreover, when opening the water tank cover 1, as long as the water tank is kept at normal pressure, the water tank cover can be easily separated from the tank body, avoiding the difficulty of disassembly after sealing by constant tight fit.

[0075] As required, the variable airbag 17 is located at the outermost side of the sealing ring, so that after being inflated, it can form a better compression effect with the sealing surface and form a larger sealing surface.

[0076] The present invention provides a cleaning tool, which includes a water tank. The water tank includes a tank body and a water tank cover fixed to the tank body to form a sealed water holding chamber. The water tank cover includes a cover body 1. The cover body 1 is provided with a sewage tank water inlet 13, a clean water tank water outlet 12 and a sewage tank air suction port 11, and a clean water tank air inlet 15. The sewage tank air suction port 11 is provided with an anti-splash isolation mechanism to prevent liquid from entering the sewage tank air suction port 11.

[0077] Specifically, the splash-proof isolation mechanism comprises a splash-proof cover, the sidewall and the bottom of which are screen structures 16. The splash-proof isolation mechanism comprises a flat screen.

[0078] The smaller holes on the screen structure 16 can form a water film through the surface tension of water, preventing clean water from directly passing through the splash-proof isolation mechanism and reaching the air outlet of the sewage tank. This can avoid the noise caused by the presence of liquid and air in the pipeline during exhaust. The screen is made of flexible material, such as gauze, so that it can be used during use to better adapt to the changes in the liquid level in the clean water tank.

[0079] like Figure 7 and Figure 8 As shown, the splash-proof isolation mechanism can be a splash-proof cover 16 including a trumpet or a spherical crown, and the splash-proof cover 16 is provided with a plurality of discharge holes 161. The splash-proof cover 16 of this shape can increase the difficulty of liquid entering, while being able to quickly gather and discharge. The discharge hole 161 is preferably trumpet-shaped, and the smaller end of the trumpet-shaped discharge hole 161 is close to the side of the sewage tank suction port, which increases the difficulty of liquid entering the splash-proof cover 16.

[0080] In order to further increase the difficulty of liquid entering the splash shield 16 while enabling rapid discharge of the liquid, the density of the discharge holes 161 at the center of the splash shield 16 is greater than that at the middle.

[0081] As required, the distance between the screen or splash shield 16 and the sewage tank suction port 11 is not less than 1 cm, which has a better effect of isolating the liquid.

[0082] According to the needs, the contact surface between the cover body 1 and the water tank is provided with a leak-proof structure 14. To avoid leakage of liquid during use, the leak-proof structure 14 includes a sealing ring. A variable airbag 17 is provided inside the sealing ring, and the variable airbag 17 is located at the outermost side of the sealing ring. In a normal state, the variable airbag 17 is at normal pressure, and the shape of the variable airbag 17 is stable. Figure 5 When the water tank 1 is used, air needs to be sucked to form a negative pressure in the water tank 1, so that the variable airbag 17 under normal pressure bulges outwards, as shown in FIG. Figure 6 As shown, the sealing interface is made tighter, and the variable airbag 17 also expands the sealing contact surface, thereby forming a better leak-proof effect. Moreover, when opening the water tank cover 1, as long as the water tank is kept at normal pressure, the water tank cover can be easily separated from the tank body, avoiding the difficulty of disassembly after sealing by constant tight fit.

[0083] As required, the variable airbag 17 is located at the outermost side of the sealing ring, so that after being inflated, it can form a better compression effect with the sealing surface and form a larger sealing surface.

[0084] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water tank cover, wherein a sealing cover is arranged at an upper opening of the water tank, wherein the water tank comprises a box body provided with a clean water area and a sewage area, and wherein the water tank is used as a mopping and sweeping cleaning tool, characterized in that: The water tank cover comprises a cover body, and the cover body is provided with: A water outlet of the clean water tank is used to deliver the clean water in the clean water area out of the tank; A clean water tank air inlet, connected to the clean water tank outlet and the clean water area; The sewage tank air suction port is connected to a negative pressure device, and the sewage tank air suction port is provided with a splash-proof isolation mechanism to prevent liquid from entering; The sewage tank water inlet, the negative pressure device draws the sewage into the sewage area through the sewage tank water inlet.

2. The water tank cover according to claim 1, characterized in that: The clean water tank air inlet, clean water area, and clean water tank water outlet constitute a clean water channel, and the negative pressure device, sewage tank air outlet, sewage area, and sewage tank water inlet constitute a sewage pumping channel. The clean water channel and sewage pumping channel are completely isolated on the cover body.

3. The water tank cover according to claim 1, characterized in that: The splash-proof isolation mechanism comprises a splash-proof cover, the side wall and the bottom of which are screen structures.

4. The water tank cover according to claim 1, characterized in that: The splash-proof isolation mechanism includes a planar screen.

5. The water tank cover according to claim 3, characterized in that: The splash shield is in a trumpet shape or a spherical crown shape and is provided with a plurality of discharge holes.

6. The water tank cover according to claim 5, characterized in that: The discharge hole is in a trumpet shape, and the smaller end of the trumpet-shaped discharge hole is close to one side of the air suction port of the sewage tank.

7. The water tank cover according to claim 6, characterized in that: The density of the discharge holes on the splash shield at the center position is greater than that at the middle position.

8. The water tank cover according to claim 3, characterized in that: The distance between the screen and the air suction port of the sewage tank is not less than 1CM.

9. The water tank cover according to claim 1, characterized in that: The contact surface between the cover body and the water tank is provided with a leak-proof structure.

10. The water tank cover according to claim 9, characterized in that: The anti-leakage structure comprises a sealing ring.

11. The water tank cover according to claim 10, characterized in that: A variable air bag is arranged in the sealing ring.

12. The water tank cover according to claim 11, characterized in that: The variable airbag is located at the outermost side of the sealing ring.

13. A water tank, comprising a tank body provided with a sewage area and a clean water area, and a water tank cover fixed to the tank body to form a sealed water storage chamber, the water tank cover being the water tank cover according to any one of claims 1 to 12.

14. A cleaning tool, comprising a water tank, the water tank comprising a tank body and a water tank cover fixed to the tank body to form a sealed water-containing chamber, the cleaning tool having the water tank according to claim 13.

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