Water tank assembly and cleaning machine

Abstract

The utility model discloses a water tank assembly and a cleaning machine. The water tank assembly comprises a tank body, a floater assembly and a sealing piece. The tank body is provided with a containing cavity and a mounting hole communicating with the containing cavity. The floater assembly is arranged on the box body and extends into the containing cavity along the mounting hole so as to be used for detecting the water level of the containing cavity; the sealing element is arranged on the floater assembly in a sleeving mode, a clamping part is arranged on the sealing element, the clamping part is matched with the mounting hole in a clamping mode, and the floater assembly abuts against the hole wall of the mounting hole in a sealed mode through the sealing element. The utility model provides the water tank assembly which is simple in assembly process and high in reliability.

Description

Technical Field

[0001] This utility model relates to the field of electrical technology, and in particular to a water tank assembly and a cleaning machine. Background Technology

[0002] In related technologies, existing floats all have threads, and when installed in a water tank, they usually need to be tightened with a nut before they can be used. In other words, the installation process of existing floats is complicated and there is a risk of leakage. Utility Model Content

[0003] The main purpose of this utility model is to provide a water tank assembly and a cleaning machine, which aims to provide a water tank assembly with simple assembly process and high reliability.

[0004] To achieve the above objectives, the water tank assembly proposed in this utility model includes:

[0005] The housing has a receiving cavity and a mounting hole communicating with the receiving cavity;

[0006] A float assembly, disposed on the housing and extending into the receiving cavity along the mounting hole, is used to detect the water level in the receiving cavity; and

[0007] A sealing element is fitted onto the float assembly. The sealing element has a snap-fit ​​portion that engages with the mounting hole. The float assembly is sealed against the wall of the mounting hole through the sealing element.

[0008] In one embodiment, the snap-fit ​​portion engages with the inner wall of the mounting hole; and / or, the snap-fit ​​portion engages with the wall surface of the housing located at the end of the mounting hole.

[0009] In one embodiment, the snap-fit ​​portion includes a snap hook disposed on the outer peripheral wall of the seal, the snap hook being located within the receiving cavity and abutting against the inner wall surface of the housing near the inner end of the mounting hole.

[0010] In one embodiment, the snap-fit ​​portion further includes a limiting block disposed on the outer peripheral wall of the seal; the limiting block is located outside the receiving cavity and abuts against the outer wall surface of the housing near the outer end of the mounting hole;

[0011] Alternatively, a snap-fit ​​protrusion is provided on the outer wall surface of the housing near the outer end of the mounting hole, and the limiting block is located outside the receiving cavity and abuts against the snap-fit ​​protrusion.

[0012] In one embodiment, the hook and the limiting block are axially spaced on the outer peripheral wall of the seal along the mounting hole to form an annular groove, through which the seal is engaged in the mounting hole.

[0013] In one embodiment, the annular groove has a sealing protrusion arranged in an annular shape on its groove peripheral wall, and the sealing protrusion is interference-fitted with the wall of the mounting hole.

[0014] In one embodiment, the wall thickness of the housing at the edge of the mounting hole is less than or equal to the width of the annular groove, and the inner and outer wall surfaces of the housing at the edge of the mounting hole are located within the annular groove.

[0015] In one embodiment, the outer diameter of the hook is tapered toward the receiving cavity to form a guide surface;

[0016] And / or, the sealing element is provided with a through hole, the float assembly is provided with a limiting platform, the sealing element is sleeved on the float assembly through the through hole and abuts against the limiting platform located outside the receiving cavity, and a guide portion is provided at the periphery of the end of the through hole away from the receiving cavity.

[0017] In one embodiment, the float assembly and the seal are an integral structure;

[0018] And / or, the mounting hole is provided on the side wall of the housing, and the float assembly and the seal are arranged laterally on the housing.

[0019] This utility model also proposes a cleaning machine, which includes the water tank assembly described above.

[0020] This utility model's water tank assembly includes a tank body, a float assembly, and a sealing element. The float assembly is mounted on the tank body and extends into the receiving cavity along the mounting hole of the tank body. The sealing element is sleeved on the float assembly and has a snap-fit ​​part that engages with the mounting hole. This snap-fit ​​assembly allows the float assembly to be quickly and stably installed on the tank body. Furthermore, the float assembly is sealed against the wall of the mounting hole through the sealing element, ensuring the airtightness of the float assembly installed on the tank body and avoiding the risk of leakage. Therefore, this application provides a water tank assembly with a simple assembly process and high reliability. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the structure of an embodiment of the water tank assembly provided by this utility model;

[0023] Figure 2 for Figure 1 A sectional view of the structure in the middle;

[0024] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0025] Figure 4 for Figure 1 A schematic diagram of the decomposed structure in the image;

[0026] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0027] Figure 6 for Figure 1 A partial structural diagram;

[0028] Figure 7 for Figure 6 A cross-sectional view of the seal in the image.

[0029] Explanation of icon numbers:

[0030] 10. Water tank assembly;

[0031] 100. Housing; 110. Receiving cavity; 120. Mounting hole; 130. Snap-fit ​​boss;

[0032] 200. Float assembly; 210. Limiting platform; 220. Limiting protrusion; 230. Magnetic component; 240. Reed switch;

[0033] 300, Seal; 310, Snap-fit ​​part; 311, Hook; 312, Limiting block; 313, Annular groove; 314, Sealing protrusion; 315, Guide surface; 320, Through hole; 330, Guide part.

[0034] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0035] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0036] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0037] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0038] This utility model proposes a water tank assembly and a cleaning machine including the water tank assembly.

[0039] Please see Figures 1 to 5 In one embodiment of this utility model, the water tank assembly 10 includes a tank body 100, a float assembly 200, and a sealing member 300. The tank body 100 has a receiving cavity 110 and a mounting hole 120 communicating with the receiving cavity 110. The float assembly 200 is disposed on the tank body 100 and extends into the receiving cavity 110 along the mounting hole 120 for detecting the water level in the receiving cavity 110. The sealing member 300 is sleeved on the float assembly 200 and has a snap-fit ​​portion 310. The snap-fit ​​portion 310 engages with the mounting hole 120, and the float assembly 200 is sealed against the wall of the mounting hole 120 through the sealing member 300.

[0040] Understandably, the housing 100 is provided with mounting holes 120 for installing the float assembly 200. The float assembly 200 extends into the housing 100 through the mounting holes 120. The mounting holes 120 can be located on the side wall of the housing 100, or on the top wall and / or bottom wall of the housing 100; no specific limitation is made here. In this embodiment, the mounting holes 120 are located on the side wall of the housing 100, and the float assembly 200 extends into the receiving cavity 110 from the side wall of the housing 100 to detect the water level in the receiving cavity 110.

[0041] Furthermore, the seal 300 can be made of an elastic material. The seal 300 is fitted onto the float assembly 200, and the seal 300 and float assembly 200 are press-fitted together, forming a seal. The seal 300 has a snap-fit ​​portion 310. The specific structure of the snap-fit ​​portion 310 is not limited; for example, it can be a hook 311, a claw, or a ring, as long as it can snap into the mounting hole 120. The float assembly 200 and the seal 300 can be an integral structure or separate structures; this is not limited here. This solution, by fitting the seal 300 onto the float assembly 200 and having the seal 300 snap into the mounting hole 120 of the housing 100 via the snap-fit ​​portion 310, not only allows the float assembly 200 to be quickly installed onto the housing 100, but also ensures the stability of the installation through the snap-fit ​​portion 310 of the seal 300.

[0042] Furthermore, the float assembly 200 is sealed against the wall of the mounting hole 120 by the seal 300, so that the water in the tank 100 cannot leak out from the mounting hole 120, thus avoiding the risk of water leakage in the water tank assembly 10. In other words, the seal 300 ensures the sealing of the float assembly 200 installed on the tank 100, thereby improving the reliability of the water tank assembly 10.

[0043] Furthermore, the specific structure of the float assembly 200 is not limited, as long as it can detect the water level in the tank 100. The float assembly 200 is made of a buoyant material, and when the float assembly 200 is immersed in the liquid, it will float due to the buoyancy of the liquid, thereby indicating the height of the liquid level. The structure of the float assembly 200 in this solution will be described in detail later, and will not be repeated here.

[0044] The water tank assembly 10 of this utility model includes a tank body 100, a float assembly 200, and a sealing element 300. The float assembly 200 is disposed on the tank body 100 and extends into the receiving cavity 110 along the mounting hole 120 of the tank body 100. The sealing element 300 is sleeved on the float assembly 200 and has a snap-fit ​​part 310. The snap-fit ​​part 310 engages with the mounting hole 120. The snap-fit ​​assembly allows the float assembly 200 to be quickly and stably installed on the tank body 100. Furthermore, the float assembly 200 is sealed against the wall of the mounting hole 120 by the sealing element 300, ensuring the airtightness of the float assembly 200 installed on the tank body 100 and avoiding the risk of leakage. Therefore, this application provides a water tank assembly 10 with a simple assembly process and high reliability.

[0045] It is understood that the specific position of the snap-fit ​​portion 310 engaging with the mounting hole 120 is not limited. In one embodiment, the snap-fit ​​portion 310 engages with the inner wall of the mounting hole 120. This arrangement ensures that the snap-fit ​​portion 310 of the seal 300 is fitted within the mounting hole 120, with an interference fit between the snap-fit ​​portion 310 and the inner wall of the mounting hole 120, thus guaranteeing the stability of the seal 300's installation. Alternatively, the mounting hole 120 may also have a mating portion adapted to the snap-fit ​​portion 310, further enhancing the stability of the snap-fit ​​portion 310's engagement.

[0046] In one embodiment, the snap-fit ​​portion 310 engages with the wall surface of the housing 100 located at the end of the mounting hole 120. It is understood that the mounting hole 120 has an inner end near the receiving cavity 110 and an outer end away from the receiving cavity 110. The snap-fit ​​portion 310 can engage with the inner wall surface of the housing 100 located at the inner end of the mounting hole 120, and / or, the snap-fit ​​portion 310 can engage with the outer wall surface of the housing 100 located at the outer end of the mounting hole 120, provided that the seal 300 can be stably engaged in the mounting hole 120.

[0047] In one embodiment, the snap-fit ​​portion 310 engages with the inner wall of the mounting hole 120, and also engages with the wall surface of the housing 100 located at the end of the mounting hole 120. This arrangement ensures that the snap-fit ​​portion 310 not only engages within the mounting hole 120, but also engages with the inner wall surface of the housing 100 located at the inner end of the mounting hole 120, and with the outer wall surface of the housing 100 located at the outer end of the mounting hole 120. This arrangement guarantees the stability of the seal 300 mounted on the housing 100.

[0048] Please see Figures 3 to 7 In one embodiment, the snap-fit ​​portion 310 includes a hook 311 disposed on the outer peripheral wall of the seal 300. The hook 311 is located within the receiving cavity 110 and abuts against the inner wall surface of the housing 100 near the inner end of the mounting hole 120. It is understood that by providing the hook 311 on the seal 300, the hook 311 extends from the mounting hole 120 into the housing 100 and abuts against the inner wall surface of the housing 100, making it difficult for the seal 300 to detach from the mounting hole 120, thus ensuring the stability of the seal 300 installation. The hook 311 has a simple structure, which helps to reduce the manufacturing difficulty and assembly process of the seal 300.

[0049] In one embodiment, the snap-fit ​​portion 310 further includes a limiting block 312 disposed on the outer peripheral wall of the sealing member 300. The limiting block 312 is located outside the receiving cavity 110 and abuts against the outer wall surface of the housing 100 near the outer end of the mounting hole 120. It can be understood that by providing the limiting block 312 on the sealing member 300, and the limiting block 312 abutting against the outer wall surface of the housing 100, the limiting block 312 can limit the insertion depth of the sealing member 300; at the same time, since the sealing member 300 is sleeved on the float assembly 200, that is, the limiting block 312 can position the installation position of the float assembly 200, the sealing member 300 has high applicability.

[0050] Please see Figures 4 to 7 In one embodiment, the snap-fit ​​portion 310 further includes a limiting block 312 disposed on the outer peripheral wall of the sealing member 300. A snap-fit ​​boss 130 is provided on the outer wall surface of the housing 100 near the outer end of the mounting hole 120. The limiting block 312 is located outside the receiving cavity 110 and abuts against the snap-fit ​​boss 130. It can be understood that by providing the snap-fit ​​boss 130, the limiting block 312 abuts against the snap-fit ​​boss 130, and the mounting hole 120 is disposed on the snap-fit ​​boss 130, thus increasing the depth of the mounting hole 120 and ensuring the stability and sealing of the sealing member 300 snapped into the mounting hole 120.

[0051] Please see Figures 5 to 7 In one embodiment, the hook 311 and the limiting block 312 are axially spaced on the outer peripheral wall of the sealing member 300 along the mounting hole 120 to form an annular groove 313. The sealing member 300 is engaged in the mounting hole 120 through the annular groove 313. By providing the annular groove 313, the sealing member 300 can be stably engaged on the housing 100. The hook 311 abuts against the inner wall surface of the housing 100, the limiting block 312 abuts against the outer wall surface of the housing 100, and the inner wall of the annular groove 313 abuts against the hole wall of the mounting hole 120, thereby achieving engagement and limiting of the sealing member 300.

[0052] Please see Figure 7 In one embodiment, the annular groove 313 has a ring-shaped sealing protrusion 314 on its peripheral wall, and the sealing protrusion 314 is press-fitted with the wall of the mounting hole 120. By providing the sealing protrusion 314, the sealing performance of the seal 300 is increased. The number of sealing protrusions 314 is not limited; it can be one, two, or more, depending on the needs. In this embodiment, there are two sealing protrusions 314, spaced apart axially along the mounting hole 120. The two sealing protrusions 314 improve the sealing performance between the seal 300 and the wall of the mounting hole 120, thus improving the reliability of the water tank assembly 10.

[0053] In one embodiment, the wall thickness of the housing 100 at the edge of the mounting hole 120 is less than or equal to the width of the annular groove 313, and the inner and outer wall surfaces of the housing 100 at the edge of the mounting hole 120 are disposed within the annular groove 313. It can be understood that the wall thickness of the housing 100 is the thickness between the outer and inner wall surfaces of the housing 100; the width of the annular groove 313 is the width of the annular groove 313 along the axial direction of the seal 300. The wall thickness of the housing 100 at the edge of the mounting hole 120 can be less than or equal to the width of the annular groove 313, so that the inner and outer wall surfaces of the housing 100 are disposed within the annular groove 313, that is, the inner and outer wall surfaces of the housing 100 at the edge of the mounting hole 120 are engaged within the annular groove 313, thereby achieving the engagement and limiting of the seal 300.

[0054] In one embodiment, the outer diameter of the hook 311 is tapered toward the receiving cavity 110 to form a guide surface 315. It is understood that when the hook 311 is inserted into the mounting hole 120, the guide surface 315 can guide the hook 311 to improve the smoothness of insertion of the seal 300 into the mounting hole 120.

[0055] Please see Figure 7 In one embodiment, the sealing element 300 is provided with a through hole 320, and the float assembly 200 is provided with a limiting platform 210. The sealing element 300 is sleeved on the float assembly 200 through the through hole 320 and abuts against the limiting platform 210 located outside the receiving cavity 110. A guide portion 330 is provided at the periphery of the end of the through hole 320 away from the receiving cavity 110. It can be understood that by providing a guide portion 330 at the insertion end of the through hole 320, it is beneficial to improve the smoothness of the sealing element 300 being sleeved on the float assembly 200. The guide portion 330 can be provided in the form of annular inclined surface to further improve the guiding ability. The limiting platform 210 on the float assembly 200 limits the sleeved installation of the sealing element 300, so as to accurately position and install the float assembly 200 and the sealing element 300 on the housing 100.

[0056] In one embodiment, the outer diameter of the hook 311 tapers towards the inside of the receiving cavity 110 to form a guide surface 315; the sealing member 300 has a through hole 320, and the float assembly 200 has a limiting platform 210. The sealing member 300 is fitted onto the float assembly 200 through the through hole 320 and abuts against the limiting platform 210 located outside the receiving cavity 110. A guide portion 330 is provided at the periphery of the end of the through hole 320 away from the receiving cavity 110. This arrangement not only improves the smoothness of the sealing member 300 being fitted onto the float assembly 200 and inserted into the mounting hole 120, but also facilitates the accurate positioning and installation of the float assembly 200 and the sealing member 300 on the tank body 100, thereby optimizing the structure and simplifying the installation process of the water tank assembly 10.

[0057] In one embodiment, the seal 300 is elastic and is interference-fitted with the outer peripheral wall of the float assembly 200; and / or, the outer peripheral wall of the float assembly 200 is provided with a limiting protrusion 220, and the seal 300 is sleeved on the limiting protrusion 220.

[0058] It is understood that the seal 300 is made of an elastic material, including but not limited to rubber, silicone, and other elastic materials. The seal 300 is press-fitted against the outer peripheral wall of the float assembly 200, improving the sealing performance between the seal 300 and the float assembly 200 and preventing the risk of leakage from the water tank assembly 10. Furthermore, the seal 300 is fitted onto the limiting protrusion 220 of the float assembly 200, improving the stability of the seal 300 fitted onto the float assembly 200. The number and shape of the limiting protrusion 220 are not limited here; the limiting protrusion 220 can be annular, protruding, dotted, or other shapes. Specifically, in this design, the limiting protrusion 220 is annular, and two spaced-apart limiting protrusions 220 are provided on the outer peripheral wall of the float assembly 200. The seal 300 is fitted onto the two limiting protrusions 220, thus improving the stability of the seal 300 fitted onto the float assembly 200.

[0059] In one embodiment, the float assembly 200 and the seal 300 are an integral structure. It is understood that the float assembly 200 and the seal 300 can be integrally injection molded to reduce the number of parts in the water tank assembly 10 and simplify the assembly process.

[0060] Please see Figures 1 to 3 In one embodiment, the mounting hole 120 is provided on the side wall of the housing 100, and the float assembly 200 and the sealing element 300 are arranged laterally on the housing 100.

[0061] It is understandable that by arranging the float assembly 200 laterally on the housing 100, the float assembly 200 in this solution is equivalent to a horizontal liquid level sensor. The horizontal liquid level sensor can effectively compensate for the limitations of the vertical liquid level sensor, so that the float assembly 200 is not limited by the space at the bottom of the housing 100. Specifically, in this solution, the float assembly 200 includes a float and a liquid level sensor. The liquid level sensor is horizontally arranged in the mounting hole 120 on the side wall of the housing 100. One end of the float is hinged to the liquid level sensor, and the other end of the float is rotatably arranged relative to the liquid level sensor. When the water level in the receiving cavity 110 changes, the other end of the float floats with the change in water level. The float contains a magnetic component 230, and the level gauge has a reed switch 240. The float moves the magnetic component 230 up and down. The reed switch 240 continuously senses the position change of the float. When the water level in the receiving cavity 110 drops, the float and magnet drop together with the liquid level. The magnet moves away from the reed switch 240, triggering the reed switch 240 to send a signal corresponding to the water level. When the water level in the receiving cavity 110 rises, the float and magnet rise together with the liquid level. The magnet approaches the reed switch 240, causing the reed switch 240 to close, thus sending a signal corresponding to the water level. This configuration enables the detection of the water level in the receiving cavity 110. Of course, the float can also achieve its monitoring or control function by combining with other components. For example, when a touch sensor, light sensor, or touch switch is installed at a certain water level, the water level can also be monitored by the up and down movement of the float.

[0062] In one embodiment, the housing 100 includes a first water tank and a second water tank. The first water tank has a first water cavity, and the second water tank has a second water cavity. The first water tank and the second water tank are separate structures; alternatively, the first water tank and the second water tank are an integral structure. It is understood that when the first water tank and the second water tank are separate structures, it is convenient to manufacture and install them separately, and it also facilitates maintenance or cleaning of either one. When the first water tank and the second water tank are an integral structure, the housing 100 has a compact structure, the integrated design reduces material usage and installation costs, and the structure is more robust.

[0063] In one embodiment, the first water tank and the second water tank are arranged side by side in the front-to-back direction, or the first water tank and the second water tank are arranged side by side in the left-to-right direction. This arrangement makes the structure of the tank 100 compact, facilitates the manufacturing and installation of the tank 100, and also contributes to the miniaturization of the cleaning machine.

[0064] This utility model also proposes a cleaning machine, which includes a water tank assembly 10 as described above. The specific structure of the water tank assembly 10 is as described in the above embodiments. Since this cleaning machine adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0065] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A water tank assembly, characterized in that, include: The housing has a receiving cavity and a mounting hole communicating with the receiving cavity; A float assembly, disposed on the housing and extending into the receiving cavity along the mounting hole, is used to detect the water level in the receiving cavity; and A sealing element is fitted onto the float assembly. The sealing element has a snap-fit ​​portion that engages with the mounting hole. The float assembly is sealed against the wall of the mounting hole through the sealing element.

2. The water tank assembly as described in claim 1, characterized in that, The snap-fit ​​part engages with the inner wall of the mounting hole; And / or, the snap-fit ​​portion engages with the wall surface of the housing located at the end of the mounting hole.

3. The water tank assembly as described in claim 1, characterized in that, The snap-fit ​​portion includes a snap hook provided on the outer peripheral wall of the seal, the snap hook being located within the receiving cavity and abutting against the inner wall surface of the housing near the inner end of the mounting hole.

4. The water tank assembly as described in claim 3, characterized in that, The snap-fit ​​portion further includes a limiting block disposed on the outer peripheral wall of the sealing member; the limiting block is located outside the receiving cavity and abuts against the outer wall surface of the housing near the outer end of the mounting hole; Alternatively, a snap-fit ​​protrusion is provided on the outer wall surface of the housing near the outer end of the mounting hole, and the limiting block is located outside the receiving cavity and abuts against the snap-fit ​​protrusion.

5. The water tank assembly as described in claim 4, characterized in that, The hook and the limiting block are spaced apart on the outer peripheral wall of the seal along the axial direction of the mounting hole to form an annular groove, through which the seal is engaged in the mounting hole.

6. The water tank assembly as described in claim 5, characterized in that, The annular groove has a sealing protrusion arranged in a ring shape on its groove wall, and the sealing protrusion is interference-fitted with the wall of the mounting hole.

7. The water tank assembly as described in claim 5, characterized in that, The wall thickness of the housing at the edge of the mounting hole is less than or equal to the width of the annular groove, and the inner and outer walls of the housing at the edge of the mounting hole are located within the annular groove.

8. The water tank assembly as described in claim 3, characterized in that, The outer diameter of the hook is tapered toward the cavity to form a guide surface; And / or, the sealing element is provided with a through hole, the float assembly is provided with a limiting platform, the sealing element is sleeved on the float assembly through the through hole and abuts against the limiting platform located outside the receiving cavity, and a guide portion is provided at the periphery of the end of the through hole away from the receiving cavity.

9. The water tank assembly as claimed in any one of claims 1 to 8, characterized in that, The float assembly and the seal are an integral structure; And / or, the mounting hole is provided on the side wall of the housing, and the float assembly and the seal are arranged laterally on the housing.

10. A cleaning machine, characterized in that, Includes the water tank assembly as described in any one of claims 1 to 9.

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