Sewage tank and scrubber

Abstract

The embodiment of the invention relates to the technical field of cleaning equipment, and particularly discloses a sewage tank and a scrubber, the sewage tank comprises a tank body, a positioning cage, a floating ball and a clamping anchor, the tank body is provided with a sewage cavity and an air outlet, and the air outlet is located at the top of the tank body and communicates with the sewage cavity; the positioning cage is fixed in the sewage cavity and is provided with a positioning cavity and a communicating hole, the positioning cavity is communicated with the air outlet, the sewage cavity is communicated with the positioning cavity through the communicating hole, and a plurality of clamping tables are arranged on the inner wall of the positioning cage at intervals; the floating ball and the clamping anchor are located in the positioning cavity, the floating ball can drive the clamping anchor to move in the positioning cavity, and one end of the clamping anchor is movably connected with the floating ball; when the box body inclines, the clamping anchor inclines relative to the box body and is clamped with the clamping table, and when the box body is upright, the clamping anchor and the floating ball are kept upright, and the clamping anchor is separated from the clamping table. Through the above mode, the embodiment of the invention not only avoids the phenomenon of false touch alarm caused by upward movement and top contact of the floating ball due to inclination of the box body, but also improves the experience feeling of a user.

Description

Technical Field

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

[0002] A floor scrubber is a cleaning machine suitable for cleaning hard floors while sucking out sewage and taking it away from the site. It has the advantages of being environmentally friendly, energy-saving, and highly efficient. When the floor scrubber is working, the roller brush rotates at high speed to erase residual traces, and the clean water tank outputs clean water to the roller brush in real time to keep the roller brush clean and moist. At the same time, the motor inside the floor scrubber generates huge suction to suck dirt into the sewage tank. In order to prevent sewage from overflowing the sewage tank, the sewage tank is usually equipped with a liquid level detection device to detect the liquid level in the sewage tank, and when the liquid level reaches the full level, it reminds the user to clean the sewage tank. The liquid level detection device of the sewage tank currently on the market usually adopts a detection method in which the float touches the top to block the suction port of the sewage tank.

[0003] In the process of implementing the embodiments of the present invention, the inventors found that when the floor scrubber passes through an obstacle and the body of the floor scrubber tilts during operation, the liquid surface in the sewage tank will increase due to the tilt of the body, and the float will move up to block the suction port, causing an erroneous alarm. Summary of the invention

[0004] In view of the above problems, an embodiment of the present invention provides a sewage tank and a floor scrubber, which overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a sewage tank, including a box body, a positioning cage, a floating ball and a clamping anchor, the box body is provided with a sewage cavity and an air outlet, the air outlet is located at the top of the box body, the air outlet is communicated with the sewage cavity, and the air outlet is used to connect with a suction motor; the positioning cage is fixed in the sewage cavity, the positioning cage is provided with a positioning cavity and a communicating hole, the positioning cavity is communicated with the air outlet, the communicating hole connects the sewage cavity and the positioning cavity, and the inner wall of the positioning cage A plurality of card platforms are provided, and the plurality of card platforms are arranged at intervals along the direction from the top of the box body to the bottom of the box body; the floating ball is located in the positioning cavity; the snap-in anchor is located in the positioning cavity, and the floating ball can drive the snap-in anchor to move in the positioning cavity, and one end of the snap-in anchor is movably connected to the floating ball; wherein, the snap-in anchor is used to be tilted relative to the box body when the box body is tilted so as to snap-in the card platform, and when the box body is upright, the snap-in anchor and the floating ball remain upright, and the snap-in anchor is separated from the card platform.

[0006] Optionally, the clamping platform is arranged around the inner wall of the positioning cage, and one end of the clamping anchor is spherically movably connected to the floating ball.

[0007] Optionally, the floating ball is provided with a ball groove; the snap-in anchor comprises a spherical end, a connecting column and a truncated cone end, the two ends of the connecting column are respectively connected to the spherical end and the truncated cone end, the spherical end is arranged in the ball groove, and the spherical end can move freely in the ball groove, the periphery of the truncated cone end protrudes from the connecting column, and the truncated cone end is used to snap-in to the table when the box is tilted.

[0008] Optionally, the truncated cone end includes a truncated cone portion and a spike portion, the spike portion is arranged around the truncated cone portion, and the connecting column is connected to the truncated cone portion.

[0009] Optionally, an inclined surface is provided on the side wall of the card platform facing the floating ball, and an angle between the inclined surface and the bottom surface of the sewage chamber is greater than 90 degrees.

[0010] Optionally, the end surface of the floating ball away from the clamping anchor is in the shape of an arc surface.

[0011] Optionally, the inner wall of the positioning cage at one end of the positioning cavity is provided with an internal thread; the inner wall of the box body is provided with an air outlet platform, the air outlet is located on the air outlet platform, the air outlet is provided with an external thread, and the internal thread is screwed to the external thread.

[0012] Optionally, the box body includes an upper cover and a water storage tank, the upper cover is detachably arranged on the water storage tank, the upper cover and the water storage tank jointly enclose the sewage cavity, and the air outlet platform is arranged on the upper cover.

[0013] Optionally, the upper cover is further provided with a sewage inlet and a partition, the sewage inlet is communicated with the sewage cavity, the partition extends to the sewage cavity, and the partition is located between the sewage inlet and the air outlet.

[0014] In order to solve the above-mentioned technical problems, another technical solution adopted by the present invention is: to provide a floor scrubber, including a suction motor, a current detection module and the above-mentioned sewage tank, the suction motor is connected to the air outlet of the sewage tank, the current detection module is connected to the suction motor, the current detection module is used to detect the current of the suction motor, and the current is used to determine whether the liquid level of the sewage chamber of the sewage tank reaches a preset full water level.

[0015] The beneficial effects of the embodiments of the present invention are as follows: compared with the prior art, the embodiments of the present application provide a sewage tank, including a tank body, a positioning cage, a floating ball and a clamping anchor. The tank body is provided with a sewage cavity and an air outlet, the air outlet is connected to the sewage cavity, the positioning cage is fixed in the sewage cavity, and is provided with a positioning cavity and a connecting hole, the positioning cavity in the positioning cage is connected to the sewage cavity and the air outlet respectively, so that the liquid level of the positioning cavity is consistent with the sewage cavity, the inner wall of the positioning cage is provided with a plurality of clamping platforms, the floating ball is located in the positioning cavity; the clamping anchor is also located in the positioning cavity, and one end of the clamping anchor is movably connected to the floating ball. When the tank body is tilted, under the action of gravity, the clamping anchor remains upright, the floating ball rotates relative to the clamping anchor, and the clamping anchor tilts relative to the floating ball. At this time, since the positioning cage is tilted with the tank body, the clamping anchor clamps the clamping platform to make the floating ball stagnate, thereby reducing the risk of the floating ball rising with the tilt of the tank body, causing the floating ball to block the air outlet by mistake. When the box body is upright, the clamping anchor slides off the clamping platform, and the clamping anchor is separated from the clamping platform, and the clamping anchor and the floating ball remain upright. At this time, the floating ball can float freely with the liquid surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0017] Figure 1 is a three-dimensional diagram of a sewage tank provided by an embodiment of the present invention;

[0018] Figure 2 is an exploded view of a sewage tank provided by an embodiment of the present invention;

[0019] Figure 3 It is a schematic diagram of the components outside the tank and a partial enlargement thereof when a sewage tank provided by an embodiment of the present invention is upright and not full of liquid;

[0020] Figure 4 It is a schematic diagram of a positioning cage and a partial enlargement when a sewage tank provided by an embodiment of the present invention is tipped in one direction;

[0021] Figure 5 is a schematic diagram of a sewage tank full of liquid provided by an embodiment of the present invention;

[0022] Figure 6 This is a block diagram of a working module of a floor scrubber provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification and in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0025] See also Figure 1 and Figure 2 The present invention provides a sewage tank 100, which includes a tank body 1, a positioning cage 2, a floating ball 3 and a clamping anchor 4. The positioning cage 2 is placed in the tank body 1 and connected to the top of the tank body 1. The floating ball 3 and the clamping anchor 4 are placed in the positioning cage 2. The floating ball 3 and the clamping anchor 4 are movably connected. The positioning cage 2 is connected to the tank body 1. The liquid level in the positioning cage 2 is consistent with the liquid level in the tank body 1. When the liquid in the tank body 1 rises, the liquid level in the positioning cage 2 also rises. When the liquid in the tank body 1 drops, the liquid level in the positioning cage 2 also drops. When the tank body 1 is upright, the floating ball 3 and the clamping anchor 4 remain upright, and the floating ball 3 rises and falls with the rise and fall of the liquid level in the positioning cage 2. When the tank body 1 is tilted, the clamping anchor 4 remains upright, the clamping anchor 4 is tilted relative to the tank body 1, and the clamping anchor 4 is clamped to the inner wall of the positioning cage 2, thereby reducing the risk of the floating ball 3 rising by mistake due to the tilt of the tank body 1.

[0026] For box 1 above, see Figure 2The box body includes an upper cover 11 and a water storage tank 12. The upper cover 11 is detachably placed on the water storage tank 12. The upper cover 11 and the water storage tank 12 together enclose a sewage cavity (not shown). The sewage cavity is used to store sewage. The upper cover 11 constitutes the top of the box body, and the bottom plate of the water storage tank 12 and the upper cover 11 arranged opposite to each other constitutes the bottom of the box body 1. The upper cover 11 extends an air outlet platform 114 toward the sewage cavity. The air outlet platform 114 is provided with an external thread, which is used to be screwed with the positioning cage 2. An air outlet 111 is provided on the air outlet platform 114, and the air outlet 111 connects the sewage chamber with the outside world. The air outlet 111 is connected to the suction motor 200. The upper cover 11 is provided with a sewage inlet 112 and a partition 113. The sewage inlet 112 is connected to the sewage chamber, and the partition 113 extends to the sewage chamber, and the partition 113 is located between the air outlet 111 and the sewage inlet 112. When the suction motor 200 is started, negative pressure is formed in the sewage chamber, and dirt is sucked into the sewage chamber from the sewage inlet 112. The partition 113 is used to block dirt to prevent the dirt from directly entering the air outlet 111 and then blocking the air outlet 111.

[0027] It is understandable that the box body 1 is not limited to the structure described above, and can also be other structures, for example: the box body 1 is an integrated box body, and a sewage cavity is formed inside the box body 1. In addition, the air outlet 111 and the sewage inlet 112 are not limited to the positions described above, for example: the sewage inlet 112 is set in the water storage tank 12.

[0028] For positioning cage 2 above, see Figure 3 and Figure 4 The positioning cage 2 is provided with a positioning cavity 20, a connecting hole 21 and a plurality of clamping platforms 22 located on the inner wall. The clamping platform 22 is located on the inner wall of the positioning cage 2. The inner wall of one end of the positioning cavity 20 is provided with an internal thread, which is screwed with the external thread of the air outlet platform 114, so that the positioning cage 2 is fixed in the box body 1, and the positioning cavity 20 is connected with the air outlet 111. The connecting hole 21 connects the sewage cavity with the positioning cavity 20, so that the liquid levels of the sewage cavity and the positioning cavity 20 can be kept consistent, and the liquid level of the positioning cavity 20 can rise with the rise of the liquid in the sewage cavity, and fall with the fall of the liquid in the sewage cavity.

[0029] Among them, a plurality of card platforms 22 are arranged at intervals along the direction from the top of the box body 1 to the bottom of the box body 1, and the distance between the two outermost card platforms along the direction from the top of the box body 1 to the bottom of the box body 1 is slightly smaller than the depth of the sewage chamber, and the bottommost card platform 22 is slightly higher than the bottom of the box body 1, so that when the box body 1 is at different liquid level inclinations, the card anchors 4 all have anchor points.

[0030] The side wall of the clamping platform 22 facing the positioning cavity 20 is provided with an inclined surface 221, and the angle between the inclined surface 221 and the bottom surface of the sewage cavity is greater than 90 degrees. The inclined surface 221 provides a larger clamping space relative to the vertical surface, which is convenient for clamping and separating the clamping anchor 4.

[0031] The clamping platform 22 is arranged around the inner wall of the positioning cage 2, so that when the box body 1 is tilted at any position within 360 degrees in the circumferential direction, the clamping anchor 4 has an anchoring point.

[0032] It can be understood that the way in which the positioning cage 2 is fixed in the box body 1 is not limited to the above-mentioned way, and other ways may be used. For example, an annular groove (not shown) is provided on the surface of the upper cover 11 facing the sewage chamber, and the annular groove surrounds the air outlet 111. One end of the positioning cage 2 is inserted into the annular groove, thereby fixing the positioning cage 2 to the box body 1.

[0033] For the above floating ball 3, please continue to refer to Figure 3 and Figure 4 The floating ball 3 is located in the positioning cage 2, and the buoyancy of the liquid in the sewage cavity on the floating ball 3 is greater than the gravity of the floating ball 3, so that the position of the floating ball 3 can change with the change of the liquid level in the sewage cavity. The floating ball 3 can be made of plastic, which is light and has good buoyancy. Optionally, the plastic can be PVC (Polyvinyl Chloride). PVC material has good corrosion resistance and chemical resistance, can be used in harsh environments such as acid and alkali, and has a longer life in sewage environments.

[0034] For further information, see Figure 4 The floating ball 3 is provided with a ball groove 31, and the ball groove 31 is used to connect with the clamping anchor 4. The end surface of the floating ball 3 away from the clamping anchor 4 is in the shape of an arc surface 32. When the floating ball 3 rises to the air outlet 111, the arc surface 32 of the floating ball is more easily inserted into the air outlet 111, thereby facilitating the blocking of the air outlet 111. Of course, in some embodiments, in addition to the end surface of the floating ball 3 away from the clamping anchor 4 being in the shape of an arc surface 32, other surfaces of the floating ball 3 can also be set as arc surfaces, for example: the entire floating ball 3 is set as an elliptical sphere, a sphere, etc.

[0035] For the above mentioned snap-in anchor 4, see Figure 3-5The clamping anchor 4 is located in the positioning cage 2, and the clamping anchor 4 includes a spherical end 41, a connecting column 42 and a truncated cone end 43. The two ends of the connecting column 42 are connected to the spherical end 41 and the truncated cone end 43 respectively. The spherical end 41 is arranged in the ball groove 31 and the spherical end 41 can move freely in the ball groove 31, so as to realize the spherical movable connection between the clamping anchor 4 and the floating ball 3, so that the clamping anchor 4 can rotate relative to the floating ball 3 at any position within the 360-degree range of the periphery, and further, when the box body 1 is tilted at any position within the 360-degree circumferential direction, the clamping anchor 4 can rotate relative to the floating ball 3. The periphery of the truncated cone end 43 protrudes from the connecting column 42, and the part of the periphery of the truncated cone end 43 protruding from the connecting column 42 is used for clamping the clamping platform 22, and the entire periphery of the truncated cone end 43 protrudes from the connecting column 42 to avoid the connection column 42 at any position in the 360-degree direction of the periphery affecting the clamping of the truncated cone end 43 with the clamping platform 22. In short, the arrangement of the card platform 22 around the inner wall of the positioning cage 2, the spherical movable connection between the card anchor 4 and the floating ball 3, and the peripheral edge of the truncated cone end 43 protruding from the connecting column 42 work together to achieve that when the box body 1 is tilted at any position within 360 degrees in the circumferential direction, the card anchor 4 can rotate relative to the floating ball 3, and the truncated cone end 43 can be carded on the card platform 22, thereby reducing the risk of the floating ball 3 mistakenly rising and blocking the air outlet 111 due to the tilt of the box body 1, thereby triggering a false alarm of the full liquid level of the sewage tank 100.

[0036] In some embodiments, the frustum end 43 includes a frustum portion 431 and a spike portion 432. The frustum portion 431 is connected to the connecting column 42. The spike portion 432 is arranged around the frustum portion 431. The spike portion 432 protrudes from the periphery of the frustum portion 431 and the connecting column 42. Along the axial direction perpendicular to the connecting column 42, the area of ​​the vertical cross-section of the spike portion 432 gradually decreases. When the box body 1 is tilted, the spike portion 432 can be more easily inserted between two adjacent card tables 22 to clamp the card tables 22.

[0037] It should be noted that: in addition to liquid, the dirt sucked into the sewage chamber from the sewage inlet 112 is usually accompanied by solids. The clamping anchor 4 and the floating ball 3 are arranged in the positioning cage 2, and the solids are filtered through the connecting hole 21 of the positioning cage 2, but the liquid is allowed to flow into the positioning cavity 20, which not only ensures that the liquid level of the sewage chamber is consistent with the liquid level in the positioning cavity 20, but also reduces the impact of the solids sucked into the sewage chamber, especially the floating solids, on the floating ball 3 when they flow into the positioning cavity 20.

[0038] In the embodiment of the present application, the sewage tank 100 includes a box body 1, a positioning cage 2, a floating ball 3 and a clamping anchor 4. The box body 1 is provided with a sewage cavity and an air outlet 111, and the air outlet 111 is connected to the sewage cavity. The positioning cage 2 is fixed in the sewage cavity and is provided with a positioning cavity 20 and a connecting hole 21. The positioning cavity 20 in the positioning cage 2 is respectively connected to the sewage cavity and the air outlet 111, so that the liquid level of the positioning cavity 20 is consistent with that of the sewage cavity. The inner wall of the positioning cage 2 is provided with a plurality of clamping platforms 22, and the floating ball 3 is located in the positioning cavity 20; the clamping anchor 4 is also located in the positioning cavity 20, and one end of the clamping anchor 4 is movably connected to the floating ball 3. When the box 1 is tilted, under the action of gravity, the clamping anchor 4 remains upright, the floating ball 3 rotates relative to the clamping anchor 4, and the clamping anchor 4 tilts relative to the floating ball 3. At this time, since the positioning cage 2 is tilted along with the box 1, the clamping anchor 4 clamps the clamping platform 22, so that the floating ball 3 stops, reducing the risk of the floating ball 3 rising with the tilt of the box 1, causing the floating ball 3 to block the air outlet 111 by mistake. When the box 1 is upright, the clamping anchor 4 slides off the clamping platform 22, the clamping anchor 4 separates from the clamping platform 22, the clamping anchor 4 and the floating ball 3 remain upright, and at this time, the floating ball 3 can float freely with the liquid surface.

[0039] This application also provides a floor scrubber embodiment, see Figure 6 The floor scrubber includes a suction motor 200, a current detection module 300 and the above-mentioned sewage tank 100. The structure and function of the sewage tank 100 can be referred to the above-mentioned embodiment, and will not be described one by one here.

[0040] The suction motor is connected to the air outlet 111 of the sewage tank 100. When the floor scrubber is working, the suction motor 200 works synchronously. The suction motor 200 sucks away the gas in the sewage chamber of the sewage tank 100, and the sewage chamber forms a negative pressure, sucking the dirt on the ground cleaned by the floor scrubber from the sewage inlet 112 into the sewage chamber. As the sewage chamber sucks more and more dirt, the liquid level of the sewage chamber will become higher and higher, and the floating ball 3 will also rise accordingly. When the floating ball 3 blocks the air outlet, the air flow at the air outlet is blocked, which will cause the current of the suction motor 200 to rise. The current detection module 300 is connected to the suction motor 200, and the current detection module 300 is used to detect the current of the suction motor. Therefore, it can be determined by the current whether the air outlet 111 is blocked, thereby determining whether the liquid level in the sewage chamber has reached the preset full water level. In other words, the current is used to determine whether the liquid level of the sewage chamber of the sewage tank 100 has reached the preset full water level.

[0041] In some embodiments, the floor scrubber may further include a controller 400 and an alarm 500. The controller 400 is respectively connected to the alarm 500, the current detection module 300 and the suction motor 200. When receiving the current from the current detection module 300, the controller 400 determines whether the current is greater than a preset normal current. When the current is greater than the preset normal current, it is determined that the liquid level in the sewage chamber of the sewage tank 100 reaches a preset full water level, and the floating ball 3 in the sewage tank 100 is sucked and blocked at the air outlet 111, controlling the suction motor 200 to stop, reducing the suction motor 200 from continuing to rotate, and causing the suction motor 200 to burn out, and controlling the alarm 500 to sound an alarm to remind the user to clear the dirt in the sewage chamber in time.

[0042] In the embodiment of the present invention, when the box body 1 is tilted, the clamping anchor 4 is tilted, and the spike portion 432 of the clamping anchor 4 is clamped to the clamping platform 22 of the positioning cage 2, so that the floating ball 3 is stopped and prevented from moving up and touching the top; when the box body 1 is upright, the spike portion 432 is separated from the clamping platform 22, and the clamping anchor 4 and the floating ball 3 remain upright. The sewage tank 100 provided by the present application not only avoids the false alarm phenomenon caused by the floating ball 3 moving up and touching the top due to the tilt of the box body 1, but also improves the user experience.

[0043] It should be noted that the preferred embodiments of the present invention are given in the specification and drawings of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments are not used as additional limitations on the content of the present invention. The purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as the scope of the present invention; further, for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should belong to the protection scope of the claims attached to the present invention.

Claims

1. A sewage tank, characterized in that: include: The box body is provided with a sewage cavity and an air outlet, wherein the air outlet is located at the top of the box body, the air outlet is communicated with the sewage cavity, and the air outlet is used to be connected to the suction motor; A positioning cage is fixed in the sewage cavity, the positioning cage is provided with a positioning cavity and a communicating hole, the positioning cavity is communicated with the air outlet, the communicating hole connects the sewage cavity with the positioning cavity, and the inner wall of the positioning cage is provided with a plurality of card platforms, and the plurality of card platforms are arranged at intervals along the direction from the top of the box body to the bottom of the box body; A floating ball is located in the positioning cavity; A clamping anchor is located in the positioning cavity, the floating ball can drive the clamping anchor to move in the positioning cavity, and one end of the clamping anchor is movably connected to the floating ball; Wherein, the clamping anchor is used to tilt relative to the box body when the box body is tilted so as to clamp the clamping platform. When the box body is upright, the clamping anchor and the floating ball remain upright, and the clamping anchor is separated from the clamping platform.

2. The sewage tank according to claim 1, characterized in that: The clamping platform is arranged around the inner wall of the positioning cage, and one end of the clamping anchor is spherically movably connected with the floating ball.

3. The sewage tank according to claim 2, characterized in that: The floating ball is provided with a ball groove; The snap-on anchor includes a spherical end, a connecting column and a truncated cone end, the two ends of the connecting column are respectively connected to the spherical end and the truncated cone end, the spherical end is arranged in the ball groove, and the spherical end can move freely in the ball groove, the periphery of the truncated cone end protrudes from the connecting column, and the truncated cone end is used to snap on the table when the box is tilted.

4. The sewage tank according to claim 3, characterized in that: The truncated cone end includes a truncated cone portion and a spike portion, the spike portion is arranged around the truncated cone portion, and the connecting column is connected to the truncated cone portion.

5. The sewage tank according to claim 3, characterized in that: The side wall of the card platform facing the floating ball is provided with an inclined surface, and the angle between the inclined surface and the bottom surface of the sewage chamber is greater than 90 degrees.

6. The sewage tank according to claim 1, characterized in that: The end surface of the floating ball away from the clamping anchor is in the shape of an arc surface.

7. The sewage tank according to any one of claims 1 to 6, characterized in that: The inner wall of the positioning cage at one end of the positioning cavity is provided with an internal thread; An air outlet platform is arranged on the inner wall of the box body, the air outlet is located on the air outlet platform, the air outlet platform is provided with an external thread, and the internal thread is screwed with the external thread.

8. The sewage tank according to claim 7, characterized in that: The box body comprises an upper cover and a water storage tank. The upper cover is detachably arranged on the water storage tank. The upper cover and the water storage tank jointly enclose the sewage cavity. The air outlet platform is arranged on the upper cover.

9. The sewage tank according to claim 8, characterized in that: The upper cover is also provided with a sewage inlet and a partition, the sewage inlet is communicated with the sewage cavity, the partition extends to the sewage cavity, and the partition is located between the sewage inlet and the air outlet.

10. A floor scrubber, characterized in that: It comprises a suction motor, a current detection module and a sewage tank as claimed in any one of claims 1 to 9; The suction motor is communicated with the air outlet of the sewage tank, and the current detection module is connected to the suction motor. The current detection module is used to detect the current of the suction motor, and the current is used to determine whether the liquid level of the sewage chamber of the sewage tank reaches a preset full water level.

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