Sewage tank and floor scrubber

Abstract

The present application relates to a sewage tank and a floor scrubber, comprising a housing, an upper cover assembly, and a separator. The upper cover assembly covers one side of the housing, an airflow channel is formed on the upper cover assembly for gas to pass only, the separator is disposed within the housing and connected to the upper cover assembly, and the separator is used to perform a solid-liquid separation operation within the housing, wherein the upper cover assembly includes a first engaging portion facing the separator, the separator includes a second engaging portion facing the first engaging portion, the first engaging portion and the second engaging portion being engaged in a cooperating engagement, and the sewage tank further includes a fastener for fastening the upper cover assembly and the separator. In this manner, the upper cover assembly and the separator are fixed once by engaging the first and second engaging portions facing each other, and then the upper cover assembly and the separator are fixed a second time by the fastener, thereby securely connecting the upper cover assembly and the separator. Furthermore, due to the first fixation, the number of fasteners can be reduced, thereby avoiding the waste of labor time caused by later assembly of the fasteners.

Description

Technical Field

[0001] The present application relates to the technical field of cleaning equipment, and in particular to a sewage tank and a floor scrubber. Background Art

[0002] With the changes in the existing social environment and people's pursuit of health, as well as the improvement of living standards, people have higher and higher requirements for their family living environment. In order to better clean the dirty floor and ensure the cleaning quality, the market has seen the emergence of floor washing machines that integrate the functions of washing, mopping and vacuuming. They are effective in cleaning and easy to use.

[0003] When cleaning the floor, a general floor scrubber will suck the sewage, solid waste and external gas on the ground into the inside of the floor scrubber's sewage tank through the suction channel. The solid matter and non-solid matter in the sewage will be separated by a separator set in the tank. The solids remain on the separator, the liquid leaks into the bottom of the tank, and the gas flows out from the upper shell or other positions on the top of the tank, thereby completing the separation of solids, gas and liquids.

[0004] However, in the prior art, the installation of the upper shell of the sewage tank and the separator is inconvenient, the fixation is not secure and the assembly time is increased. Summary of the Invention

[0005] Based on this, the present application addresses the problem that the separator in the sewage tank and the upper shell of the sewage tank are not firmly fixed and the assembly time is increased, and proposes a sewage tank and a floor scrubber, which have the technical effects of being firmly fixed and easy to assemble.

[0006] A sewage tank comprises a tank body and an upper cover assembly, wherein the upper cover assembly covers one side of the tank body and is provided with an air flow channel for gas to pass only;

[0007] A separator is assembled in the box body and connected to the upper cover assembly. The separator is used to perform solid-liquid separation operations in the box body;

[0008] Among them, the upper cover assembly includes a first clamping part facing the separator, the separator includes a second clamping part facing the first clamping part, the first clamping part and the second clamping part are engaged with each other, and the sewage tank also includes a fastener, which is used to fasten the upper cover assembly and the separator.

[0009] In one embodiment, the upper cover assembly includes a first positioning portion, and the separator includes a second positioning portion. When the first positioning portion is positioned and matched with the second positioning portion, the first engaging portion is engaged with the second engaging portion.

[0010] In one embodiment, the upper cover assembly includes a cover body and a filter element. The first engaging portion is provided on the cover body. The cover body is provided with an assembly groove. The filter element is assembled in the assembly groove to form an air flow channel.

[0011] In one embodiment, a first through hole is provided on the cover body, and a second through hole is provided on the separator. When the first engaging portion and the second engaging portion are engaged, the first through hole and the second through hole are aligned, and the fastener passes through the first through hole and the second through hole and is fastened.

[0012] In one embodiment, the upper cover assembly further includes a button, which is assembled in the cover body;

[0013] The button includes a body and a raised portion, the raised portion is connected to the body and protrudes relative to the body along a first direction, the body and the raised portion define a pressing cavity, the opening of the pressing cavity is set toward the outside of the cover, and the first direction is intersected with the airflow direction.

[0014] In one embodiment, the cover has a first opening communicating with the outside, the body is assembled in the cover, and the protrusion extends into the first opening and extends along a first direction;

[0015] The first opening is communicated with the pressing cavity.

[0016] In one embodiment, the cover body has a key slot, which is connected to the first opening and forms a second opening at one end thereof. The key slot has a deformable wall, and opposite ends of the deformable wall are respectively connected to the first opening and the second opening.

[0017] The key enters the key slot from the second opening and moves along the extension direction of the key slot until the protrusion extends into the first opening. During the movement of the key, the protrusion is constructed to drive the deformable wall to deform along the first direction toward the side away from the protrusion.

[0018] In one embodiment, the deformable wall has an inclined surface, one end of the inclined surface is connected to the second opening, and 5 is inclined toward a side close to the key slot in the assembly direction of the key;

[0019] The button has an assembled state and a fixed state. When the button is in the assembled state, the protrusion abuts against the inclined surface and drives the deformable wall to deform toward the side away from the protrusion. When the button is in the fixed state, the protrusion extends into the first opening, and the deformable wall resets in the reverse direction and abuts against the body.

[0020] In one embodiment, the deformable wall further includes a flat surface, one end of the flat surface is connected to the inclined surface, and the other end of the flat surface is connected to the second opening;

[0021] When the key is in an assembled state, the protrusion slides from the inclined surface to abut against the flat surface and drives the deformable wall to deform toward a side away from the protrusion.

[0022] According to another aspect of the present application, a floor scrubber is provided, comprising a body and a sewage tank according to any one of the above embodiments.

[0023] In the above-mentioned sewage tank, the upper cover assembly and the separator are fixed to each other by the first and second engaging portions engaging with each other, and then the upper cover assembly and the separator are fixed to each other again by fasteners, thereby firmly fixing the upper cover assembly and the separator. In addition, due to the cooperative fixation of the first and second engaging portions, the number of fasteners can be reduced, thus avoiding the waste of time caused by the subsequent assembly of fasteners. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the exploded structure of a sewage tank provided in one embodiment of the present application;

[0025] Figure 2 for Figure 1 A schematic diagram of a separator for a sewage tank is provided in;

[0026] Figure 3 for Figure 1 A schematic diagram of a sewage tank cover provided in;

[0027] Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure of the sewage tank provided in;

[0028] Figure 5 for Figure 1 Schematic diagram of the sewage tank cover and button decomposition structure provided in;

[0029] Figure 6 for Figure 1 A schematic cross-sectional structure diagram of the upper cover assembly of the sewage tank is provided in FIG.

[0030] 1. The filter element includes the following components: 1. a first locking portion; 2. a first stopper; 3. a second stopper; 4. a second positioning portion; 5. a second positioning portion; 6. a second second positioning portion; 7. a second second positioning portion; 8. a second second positioning portion; 9. a second second positioning portion; 10. a first locking portion; 11. a first locking portion; 12. a first positioning portion; 13. a second positioning portion; 14. a second second positioning portion; 15. a second positioning portion; 16. a first opening; 17. a first airflow direction; 18. a second airflow direction; 19. a second airflow direction; 20. a second airflow direction; 21. a second airflow direction; 22. a second airflow direction; 23. a second airflow direction; 24. a second airflow direction; 25. a first airflow direction; 26. a first airflow direction; 27. a first airflow direction; 28. a first airflow direction; 29. ​​a first airflow direction; 30. a first airflow direction; 31. a first airflow direction; 32. a first airflow direction; 33. a first airflow direction; 34. a first airflow direction; 35. a first airflow direction; 36. a first airflow direction; 37. a first airflow direction; 38. a first airflow direction; 39. a first airflow direction; 40. a first airflow direction; 41. a first airflow direction; 42. a first airflow direction; 43. a first airflow direction; 44. a first airflow direction; 45. a first airflow direction; 46. a first airflow direction; 47. a first airflow direction; 48. a first airflow direction; 49. a first airflow direction; 50. a first airflow direction; 51. a first airflow direction; 52. a first airflow direction; DETAILED DESCRIPTION

[0031] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0032] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0034] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0035] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0036] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0037] See Figures 1 to 4 The present application provides a sewage tank 100, including a box body 10, an upper cover assembly 20 and a separator 30. The upper cover assembly 20 covers one side of the box body 10. An air flow channel for only gas to pass through is formed on the upper cover assembly 20. The separator 30 is arranged in the box body 10 and connected to the upper cover assembly 20. The separator 30 is used to perform a solid-liquid separation operation in the box body 10, wherein the upper cover assembly 20 includes a first clamping portion 211 facing the separator 30, and the separator 30 includes a second clamping portion 31 facing the first clamping portion 211. The first clamping portion 211 and the second clamping portion 31 are engaged with each other. The sewage tank 100 also includes a fastener 40, which is used to fasten the upper cover assembly 20 and the separator 30.

[0038] Specifically, the housing 10 has a sewage extraction channel (not shown in the figure) for extracting sewage into the housing 1010. The sewage carried by the airflow may contain solids and liquids, or may contain only solids. The solids, liquids, and gases, or solids and gases, are separated by the separator 30. The solids remain on the separator 30, the liquids remain in the housing 10, and the gases flow out through the airflow channel on the upper cover assembly 20, thereby completing the separation of solids, gases, and liquids, or solids and gases.

[0039] Further, see Figure 1 and Figure 2 The separator 30 includes a separation portion 32 and a separation flow channel 35. The airflow drives the solid and / or liquid garbage to be cyclone-separated in the separation flow channel 35. The separation portion 32 is provided with a plurality of filter holes. The solid and / or liquid falls on the separation portion 32. The liquid falls from the filter holes and is temporarily stored in the box body 10. The solid is stored in the separation portion 32. The rest flows out of the sewage tank 100 from the top of the separation flow channel 35 through the airflow channel of the upper cover assembly 20.

[0040] In this way, the sewage tank 100 of the present application, the separator 30 and the upper cover assembly 20 are fixed by the first engaging portion 211 and the second engaging portion 31 facing each other, which cooperate to engage and lock the upper cover assembly 20 and the separator 30. The upper cover assembly 20 and the separator 30 are then fixed a second time by the fastener 40, thereby firmly connecting the upper cover assembly 20 and the separator 30. In addition, due to the cooperative fixation of the first engaging portion 211 and the second engaging portion 31, the number of fasteners 40 can be reduced, avoiding the phenomenon of wasted work time caused by the later assembly of the fasteners 40.

[0041] Specifically, the first locking portion 211 and the second locking portion 31 are a matching structure. In the process of the upper cover assembly 20 and the separator 30 approaching each other, the first locking portion 211 and the second locking portion 31 can be automatically locked, or the first locking portion 211 and the second locking portion 31 can be aligned and locked, thereby achieving one-time fixation of the upper cover assembly 20 and the separator 30.

[0042] In one embodiment, a first through-hole 212 is formed on the upper cover assembly 20, and a second through-hole 34 is formed on the separator 30. When the first engaging portion 211 engages with the second engaging portion 31, the first through-hole 212 is aligned with the second through-hole 34. The fastener 40 is passed through the first through-hole 212 and the second through-hole 34 and fastened to secure the upper cover assembly 20 and the separator 30 together, thereby achieving secondary fixation of the upper cover assembly 20 and the separator 30. Furthermore, when inserting the fastener 40, there is no need to align the first through-hole 212 and the second through-hole 34, thereby saving assembly time.

[0043] Specifically, the fastener 40 can be a general part such as a screw or nut. In other embodiments, it can also be a structure such as a clamping fixture, which is not limited in this application.

[0044] In one embodiment, see Figure 2 and Figure 3 The upper cover assembly 20 includes a first positioning portion 214, and the separator 30 includes a second positioning portion 33. When the first positioning portion 214 is positioned and matched with the second positioning portion 33, the first engaging portion 211 is engaged with the second engaging portion 31.

[0045] The first positioning member and the second positioning member can be arranged as a combination of a protrusion and a groove. Through the positioning and cooperation of the two, the assembly position of the upper cover assembly 20 and the separator 30 is fixed, and then they can be fixed directly without additional repeated alignment, which saves time and simplifies installation and assembly.

[0046] In one embodiment, see Figure 1The upper cover assembly 20 includes a cover body 21 and a filter element 22. The first engaging portion 211, the first through hole 212 and the first positioning member are all provided on the cover body 21. The cover body 21 is provided with an assembly groove 213. The filter element 22 is assembled in the assembly groove 213 to form an air flow channel.

[0047] Specifically, the filter element 22 can be made of fine sponge. If the air flow after passing through the separator 30 still carries impurities such as liquid or solid, the filter element 22 can filter and block the impurities in the air flow, further purifying the air flow, so that pure gas can flow out of the air flow channel.

[0048] In one embodiment, the first locking portion 211 can be set as a locking block, and the second locking portion 31 includes a first limiting block 311 and a second limiting block 312. The first limiting block 311 and the second limiting block 312 are intersected and connected to form a fixed groove for accommodating the first locking portion 211. The first limiting block 311 is constructed to always maintain elastic contact with the first locking portion 211 during the process of the first locking portion 211 moving toward the fixed groove.

[0049] Of course, the first engaging portion 211 and the second engaging portion 211 may also be set in reverse, that is, the second engaging portion 211 may be set as a card block, and the first engaging portion 211 may be set as a structure including multiple limit blocks, which is not limited in this application.

[0050] Specifically, the cover 21 and the separator 30 can be manually brought closer together until the first engaging portion 211 passes over the first stop block 311, enters the fixing groove, and abuts against the first stop block 311 and the second stop block 312, thereby achieving engagement. Furthermore, the first engaging portions 211 can be positioned on different sides of the cover 21 to achieve uniform fixation. For example, a first engaging portion 211 can be positioned on each side, three first engaging portions 211 can be positioned on one side, and a fastener 40 can be positioned on each left and right end of the filter element 22 for fixation. This not only allows for more fixed positions, but also reduces the number of fasteners 40.

[0051] In one embodiment, see Figure 5 and Figure 6 The upper cover assembly 20 also includes a button 23, which is assembled in the cover body 21. The button 23 includes a main body 231 and a protrusion 232. The protrusion 232 is connected to the main body 231 and protrudes relative to the main body 231 along the first direction L3. The main body 231 and the protrusion 232 define a pressing cavity 233. The opening of the pressing cavity 233 is set toward the outside of the cover body 21, and the first direction L3 is intersected with the airflow direction L1.

[0052] The opening of the pressing cavity 233 is arranged toward the outside of the cover 21, and the user can press the main body 231 by inserting the thumb into the pressing cavity 233. Furthermore, due to the provision of the protrusion 232, the depth of the pressing cavity 233 in the first direction L3 is increased, which is equivalent to increasing the area of ​​the button 23 that the user can contact on the side wall of the cover 21, thereby reducing the pressure and making it easier for the user to press the button 23.

[0053] Specifically, the user can press the button 23 on the side below the airflow direction. The sewage tank 100 also includes a return spring 50, one end of which is connected to the body 231 and the other end is connected to the separator 30. When the user presses the button 23, the return spring 50 accumulates elastic restoring force, so that the button 23 automatically returns to its original position.

[0054] Specifically, the cavity wall of the pressing cavity 233 can be configured to be arc-shaped to better fit the shape of the user's thumb.

[0055] In one embodiment, the cover 21 has a first opening 216 that communicates with the outside world. The button 23 is assembled within the cover 21, and the protrusion 232 extends into the first opening 216 along a first direction L3. The first opening 216 communicates with the pressing cavity 233. The user's thumb can enter the pressing cavity 233 through the first opening 216, contact the body 231 and the protrusion 232, and press the button 23, causing the protrusion 232 to move up and down along the installation direction.

[0056] In one embodiment, the cover body 21 has a key slot 215, which is connected to the first opening 216 and has a second opening at one end. The key 23 enters the key slot 215 from the second opening and moves along the extension direction of the key slot 215 until the protrusion 232 extends into the first opening 216. During the movement of the key 23, the protrusion 232 is constructed to drive the groove wall of the key slot 215 facing the protrusion 232 to deform.

[0057] It can be understood that if the button 23 lacks the raised portion 232 and the body 231 is a rectangular block, the button slot 215 is a rectangular cavity with the same shape and dimensions as the rectangular block, and the body 231 can be assembled from the bottom up along the airflow direction L1 from the end of the second opening. If the button 23 is provided with the raised portion 232, and the size of the button slot 215 remains unchanged, the raised portion 232 will interfere with the cover 21 when the button 23 is installed into the button slot 215 from the end of the second opening.

[0058] Therefore, the groove wall connecting the key groove 215 and the second opening is defined as the deformable wall 218, and the protrusion 232 is constructed to drive the deformable wall 218 to produce deformation along the first direction L3, that is, the deformable wall 218 is lifted along the first direction L3 by the protrusion 232, so that the protrusion 232 is hard-assembled into the key groove 215 until the protrusion 232 extends from the other end of the second groove wall into the first opening 216. At this time, the deformable wall 218 and the protrusion 232 are separated, and the force pressing on the deformable wall 218 is cancelled. The deformable wall 218 can be reset to contact with the main body 231, thereby completing the assembly of the key 23.

[0059] It is understood that when the button 23 is assembled, the upper cover assembly 20 and the separator 30 are not assembled. Only after the button 23 is assembled in the cover body 21, the return spring 50 is installed and the upper cover assembly 20 and the separator 30 are connected and fixed. After the upper cover assembly 20 and the separator 30 are connected and fixed, the second opening is located between the cover body 21 and the separator 30 and is closed by the separator 30.

[0060] In one embodiment, the deformable wall 218 has an inclined surface 2181a, one end of which communicates with the second opening. In the assembly direction of the key 23, the inclined surface 2181a is inclined toward the side closest to the key slot 215, meaning that the deformable wall 218 is thinnest on the side closest to the second opening. The key 23 has an assembled state and a fixed state. When the key 23 is in the assembled state, the protrusion 232 abuts the inclined surface 2181a and, guided by the inclined surface 2181a, gradually moves into the key slot 215, driving the deformable wall 218 to deform away from the protrusion 232, thereby allowing the key 23 to be installed in the upper cover assembly 20 without altering the key slot 215.

[0061] Furthermore, when the protrusion 232 continues to move, the protrusion 232 extends into the first opening 216, and the deformed wall 218 resets and abuts against the body 231. At this time, the button 23 switches to the fixed state, that is, the button 23 is completely assembled into the button groove 215.

[0062] In one embodiment, the deformable wall 218 also includes a flat surface 2181b, one end of the flat surface 2181b is connected to the inclined surface 2181a, and the other end is connected to the second opening. When the button 23 is in the assembled state, the protrusion 232 slides from the inclined surface 2181a to abut against the flat surface 2181b and drives the deformable wall 218 to deform toward the side away from the protrusion 232.

[0063] The setting of the inclined surface 2181a provides a guiding function. After guiding the protrusion 232 to enter the key groove 215, the protrusion 232 abuts against the straight surface 2181b and slides along the straight surface 2181b until it breaks away from the straight surface 2181b and enters the first opening 216. It can be understood that the degree of deformation of the deformation wall 218 on the side where the inclined surface 2181a is located is greater than the degree of deformation of the deformation wall 218 on the side where the straight surface 2181b is located.

[0064] In other embodiments, the inclined surface 2181a may also extend and tilt from the second opening to the first opening 216. Compared with this solution, the provision of the straight surface 2181b allows the protrusion 232 to slide more smoothly, and it is easier for the protrusion 232 to enter the first opening 216 when it slides to the end of the deformable wall 218 close to the first opening 216.

[0065] According to another aspect of the present application, a floor scrubber is provided, comprising a body and the sewage tank 100 of any of the aforementioned embodiments. The body of the floor scrubber has a mounting position formed therein, and the sewage tank 100 is mounted thereon. The floor scrubber includes the sewage tank 100 of any of the aforementioned embodiments. Because the floor scrubber has all the technical features of the sewage tank 100 of any of the aforementioned embodiments, it achieves the same technical effects as the aforementioned sewage tank 100.

[0066] The floor scrubber provided in the present application may also include a clean water tank and a floor brush assembly. The floor brush assembly is used to clean the surface to be cleaned. The clean water tank is used to supply clean water to the floor brush assembly for cleaning the floor. The sewage and solid waste generated after the floor scrubber cleans the surface to be cleaned is recovered through the sewage tank.

[0067] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The above embodiments merely illustrate several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A sewage tank, characterized in that: include: A box body (10) and an upper cover assembly (20), wherein the upper cover assembly (20) covers one side of the box body (10), and an air flow channel is formed on the upper cover assembly (20) for only gas to pass through; a separator (30), the separator (30) being assembled on the housing (10) and connected to the upper cover assembly (20), the separator (30) being used to perform a solid-liquid separation operation in the housing (10); The upper cover assembly (20) includes a first engaging portion (211) facing the separator (30), the separator (30) includes a second engaging portion (31) facing the first engaging portion (211), the first engaging portion (211) and the second engaging portion (31) are engaged in a cooperating manner, and the sewage tank (100) further includes a fastener (40), the fastener (40) being used to fasten the upper cover assembly (20) and the separator (30); The upper cover assembly (20) includes a cover body (21), the first engaging portion (211) is provided on the cover body (21), and a first through-hole (212) is provided on the cover body (21), and a second through-hole (34) is provided on the separator (30), when the first engaging portion (211) and the second engaging portion (31) are engaged and engaged, the first through-hole (212) and the second through-hole (34) are aligned, and the fastener (40) passes through the first through-hole (212) and the second through-hole (34) and is fastened; The upper cover assembly (20) further includes a button (23), and the button (23) is assembled in the cover body (21); The button (23) includes a body (231) and a raised portion (232), wherein the raised portion (232) is connected to the body (231) and is arranged to protrude relative to the body (231) along a first direction (L3), and the body (231) and the raised portion (232) define a pressing cavity (233), wherein the opening of the pressing cavity (233) is arranged toward the outside of the cover (21), and the first direction (L3) intersects with the airflow direction (L1); The cover (21) has a first opening (216) communicating with the outside, the body (231) is assembled in the cover (21), and the protrusion (232) extends into the first opening (216) and extends along the first direction (L3); the first opening (216) is communicated with the pressing cavity (233); The cover (21) has a key slot (215) in it, the key slot (215) is connected to the first opening (216), and a second opening is formed at one end of the key slot (215), the key slot (215) has a deformable wall (218), and opposite ends of the deformable wall (218) are respectively connected to the first opening (216) and the second opening; The key (23) enters the key slot (215) from the second opening and moves along the extension direction of the key slot (215) until the protrusion (232) extends into the first opening (216), and during the movement of the key (23), the protrusion (232) is configured to drive the deformable wall (218) to deform along the first direction (L3) toward a side away from the protrusion (232).

2. The sewage tank according to claim 1, characterized in that: The upper cover assembly (20) includes a first positioning portion (214), and the separator (30) includes a second positioning portion (33). When the first positioning portion (214) is positioned and matched with the second positioning portion (33), the first engaging portion (211) is engaged with the second engaging portion (31).

3. The sewage tank according to claim 1, characterized in that: The upper cover assembly (20) includes a filter element (22). An assembly groove (213) is provided on the cover body (21). The filter element (22) is assembled in the assembly groove (213) to form the air flow channel.

4. The sewage tank according to claim 1, characterized in that: The deformable wall (218) has an inclined surface (2181a), one end of the inclined surface (2181a) is connected to the second opening, and in the assembly direction (L2) of the key (23), the inclined surface (2181a) is inclined toward a side close to the key slot (215); The button (23) has an assembled state and a fixed state. When the button (23) is in the assembled state, the protrusion (232) abuts against the inclined surface (2181a) and drives the deformable wall (218) to deform toward a side away from the protrusion (232). When the button (23) is in the fixed state, the protrusion (232) extends into the first opening (216), and the deformable wall (218) resets in the reverse direction and abuts against the body (231).

5. The sewage tank according to claim 4, characterized in that: The deformable wall (218) further includes a flat surface (2181b), one end of the flat surface (2181b) is connected to the inclined surface (2181a), and the other end is connected to the second opening; When the button (23) is in the assembled state, the raised portion (232) slides from the inclined surface (2181a) to abut against the straight surface (2181b) and drives the deformable wall (218) to deform toward a side away from the raised portion (232).

6. A floor scrubber, characterized in that: It comprises a body and a sewage tank (100) according to any one of claims 1 to 5; The machine body has a mounting position, and the sewage tank (100) is assembled on the mounting position.

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