Sewage tank, cleaning device and cleaning system

Abstract

The application discloses a sewage tank, a cleaning device and a cleaning system. The sewage tank comprises a tank body, which is formed with a containing cavity for containing dirty liquid; a separation assembly, which is located at least partially in the containing cavity and separates the containing cavity into at least a first cavity and a second cavity, the first cavity and the second cavity are in fluid communication, and the separation assembly restricts solid waste in the dirty liquid entering the containing cavity in the first cavity; and a sewage discharge channel, which is used for discharging the dirty liquid in the containing cavity out of the containing cavity, and has a sewage discharge inlet, at least part of which is communicated with the first cavity. The sewage tank provided by the application separates the sewage tank into the first cavity and the second cavity through the separation assembly, and the sewage discharge inlet of the sewage discharge channel is communicated with the first cavity, so that the solid waste restricted in the first cavity is more easily discharged.

Description

Technical Field

[0001] This application relates to the field of cleaning equipment technology, and in particular to a wastewater tank, cleaning equipment, and cleaning system. Background Technology

[0002] In related technologies, a filter element is installed inside the sewage tank. After dirty liquid enters the sewage tank, solid waste is trapped inside the filter element, while gas and liquid flow out through the pores of the filter element, achieving solid-liquid separation. However, the solid waste trapped inside the filter element requires manual emptying and cleaning by the user, resulting in a poor user experience. Summary of the Invention

[0003] This application aims to at least partially address the technical problems in the aforementioned related technologies.

[0004] This application provides a wastewater tank, comprising: a tank body having a receiving cavity for containing dirty liquid; a separation component at least partially located within the receiving cavity and dividing the receiving cavity into at least a first cavity and a second cavity, the first cavity and the second cavity being in fluid communication, the separation component confining solid waste in the dirty liquid entering the receiving cavity within the first cavity; and a discharge channel for discharging the dirty liquid from the receiving cavity into the receiving cavity, the discharge channel having a discharge inlet, at least partially of the discharge inlet being connected to the first cavity.

[0005] In some embodiments of this application, the sewage tank further includes a cover for covering the tank body, wherein the direction of the cover relative to the tank body is defined as upward and the direction of the tank body relative to the cover is defined as downward.

[0006] In some embodiments of this application, the separation component and the box cover are fixed relative to each other, the separation component and the box cover are integrally formed, or the separation component is fixedly connected to the box cover.

[0007] In some embodiments of this application, the separation component extends downward, and the lower wall of the housing at least partially defines the first cavity.

[0008] In some embodiments of this application, the lower wall of the housing at least partially defines the sewage inlet.

[0009] In some embodiments of this application, the separation component has a generally D-shaped cross-section perpendicular to the vertical direction, and the separation component is a D-shaped cylinder, with the planar portion of the D-shaped cylinder abutting against the sidewall of the housing extending in the vertical direction.

[0010] In some embodiments of this application, the separating component has at least a first segment, a second segment, and a third segment along the vertical direction, the lower end of the separating component defines the third segment, and the first segment and the third segment are at least partially hollowed out on the D-shaped cylindrical arc surface, the hollowed-out structure providing fluid communication between the first cavity and the second cavity.

[0011] In some embodiments of this application, the sewage tank further includes a sewage inlet channel, which includes a sewage inlet connected to the first cavity.

[0012] In some embodiments of this application, the sewage tank further includes an air extraction channel, which includes an air extraction inlet that communicates with the second cavity.

[0013] This application also provides a wastewater tank, comprising: a tank body having a receiving cavity for containing dirty liquid; a separation component at least partially located within the receiving cavity and dividing the receiving cavity into at least a first cavity and a second cavity, the first cavity and the second cavity being in fluid communication, the separation component restricting solid waste in the dirty liquid from entering the second cavity from the first cavity or from the second cavity into the first cavity; a wastewater inlet channel for guiding the dirty liquid into the receiving cavity, the wastewater inlet channel including a wastewater inlet communicating with the first cavity; and a wastewater discharge channel for discharging the dirty liquid from the receiving cavity into the receiving cavity, the wastewater discharge channel having a wastewater discharge inlet, at least partially of the wastewater discharge inlet communicating with the first cavity.

[0014] In some embodiments of this application, the sewage tank further includes a cover for covering the tank body, wherein the direction of the cover relative to the tank body is defined as upward and the direction of the tank body relative to the cover is defined as downward.

[0015] In some embodiments of this application, the separation component and the box cover are fixed relative to each other, the separation component and the box cover are integrally formed, or the separation component is fixedly connected to the box cover.

[0016] In some embodiments of this application, the separation component extends downward, and the lower wall of the housing at least partially defines the first cavity.

[0017] In some embodiments of this application, the lower wall of the housing at least partially defines the sewage inlet.

[0018] In some embodiments of this application, the separation component has a generally D-shaped cross-section perpendicular to the vertical direction, and the separation component is a D-shaped cylinder, with the planar portion of the D-shaped cylinder abutting against the sidewall of the housing extending in the vertical direction.

[0019] In some embodiments of this application, the separating component has at least a first segment, a second segment, and a third segment along the vertical direction, the lower end of the separating component defines the third segment, and the first segment and the third segment are at least partially hollowed out on the D-shaped cylindrical arc surface, the hollowed-out structure providing fluid communication between the first cavity and the second cavity.

[0020] In some embodiments of this application, the sewage tank further includes an air extraction channel, which includes an air extraction inlet that communicates with the second cavity.

[0021] This application also provides a cleaning device, comprising: the aforementioned wastewater tank; a vacuum assembly fluidly connected to the wastewater tank and configured to provide suction to create a negative pressure within the receiving cavity; and a cleaning assembly connected to the wastewater tank and configured to clean the surface to be cleaned.

[0022] This application also provides a cleaning system, including: the above-mentioned cleaning equipment and a base station, wherein the cleaning equipment can be docked at the base station; the base station includes a suction component, and when the cleaning equipment is docked at the base station, the suction component is in fluid communication with the sewage tank. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a sewage tank according to an embodiment of this application.

[0025] Figure 2 This is an exploded view of the structure of a sewage tank according to an embodiment of this application.

[0026] Figure 3a and Figure 3b This is a schematic diagram of the structure of a box according to an embodiment of this application.

[0027] Figure 4 This is a schematic diagram of the structure of a box lid according to an embodiment of this application.

[0028] Figure 5a This is a schematic diagram of the structure of a box lid according to an embodiment of this application.

[0029] Figure 5b This is a partial structural diagram of the metal filter screen in the first section of the separation component.

[0030] Figure 6This is an exploded view of the structure of a box lid according to an embodiment of this application.

[0031] Figure 7 This is a cross-sectional view (AA) of a sewage tank according to an embodiment of this application.

[0032] Figure 8 This is a cross-sectional view (BB) of a sewage tank according to an embodiment of this application.

[0033] Figure 9 This is a cross-sectional view (CC) of a housing according to an embodiment of this application.

[0034] Figure 10a This is a schematic diagram of the structure of a box lid according to an embodiment of this application.

[0035] Figure 10b This is a cross-sectional view (BB) of a box lid according to an embodiment of this application.

[0036] Figure 11 This is a schematic diagram of the structure of a cleaning device according to an embodiment of this application.

[0037] Figure 12 This is a schematic diagram of the structure of a cleaning system according to an embodiment of this application.

[0038] Explanation of the attached drawing numbers: Sewage tank 100, tank cover 110, tank body 120, receiving cavity 121, separation components 130, 130', flat part 131, curved part 132, first section 133, second section 134, third section 135, sewage discharge channel 140, sewage discharge inlet 141, sewage inlet channel 150, sewage inlet 151, air extraction channel 160, air extraction inlet 161, water level detection component 170, first cavity 210, second cavity 220, cleaning equipment 300, cleaning system 400, base station 410.

[0039] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0041] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0042] Furthermore, the use of terms such as "first" and "second" in this application is 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 as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0043] This application provides a sewage tank, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.

[0044] First Embodiment

[0045] This embodiment provides a sewage tank 100. Please refer to [link / reference]. Figures 1 to 9 It mainly includes a cover 110, a body 120, a separation component 130, a sewage discharge channel 140, and a sewage inlet channel 150.

[0046] The lid 110 is affixed to the box body 120, with the lid 110 facing upwards relative to the box body 120, and the box body 120 facing downwards relative to the lid 110. A soft rubber seal is provided at the mating point between the lid 110 and the box body 120, and the lid 110 and the box body 120 are mated by the interference fit provided by the soft rubber seal. The user can remove the lid 110 to manually clean the box body 120. It should be understood that the lid and the box body can also be mated by a fixed connection, or the lid and the box body can be integrally formed; this application does not limit the mating method of the lid and the box body.

[0047] The tank 120 has a hollow structure, and a receiving cavity 121 for containing dirty liquid is formed inside the tank 120. The wastewater tank 100 is also provided with an air extraction channel 160, which includes an air extraction inlet 161 provided on the tank cover 110. The air extraction channel 160 is used for fluid communication with the vacuum assembly. During the cleaning of the surface to be cleaned, air is extracted from the air extraction inlet 161, thereby creating a negative pressure in the receiving cavity 121 of the tank 120 to suck up the external dirty liquid. Preferably, as Figure 4 As shown, two air extraction inlets 161 are provided, respectively located on both sides of the upper part of the separation component 130.

[0048] The separation assembly 130 extends downward from the cover 110, and its upper end is fixedly connected to the cover 110 by screws or other connecting devices. When the user needs to clean the separation assembly 130 separately, the connecting device can be disassembled to separate the separation assembly 130 from the cover 110. It should be understood that the separation assembly can also be integrally formed with the cover 110.

[0049] like Figure 8 As shown, the separation component 130 extends downward to the lower wall of the housing 120, and the lower end of the separation component 130 can directly abut against the lower wall of the housing 120. Alternatively, a soft rubber seal can be provided between the lower end of the separation component 130 and the lower wall of the housing 120 to further improve the separation effect of the separation component. Thus, the separation component 130 divides the receiving cavity of the housing 120 into at least a first cavity 210 and a second cavity 220. The second cavity 220 generally surrounds the first cavity 210, and the lower wall of the housing 120 at least partially defines the first cavity 210, that is, the lower wall of the housing 120 forms at least a partial boundary of the first cavity 210. Figures 6 to 8 As shown, when observing the separation assembly 130 in a cross-section perpendicular to the vertical direction, it can be seen that the separation assembly 130 is roughly D-shaped, that is, the overall shape of the separation assembly 130 is roughly a D-shaped cylinder with an open bottom. The D-shaped cylindrical separation assembly 130 includes a flat portion 131 and an arc-shaped portion 132. The flat portion 131 is close to and abuts against the side wall of the housing 120 extending in the vertical direction, while the arc-shaped portion 132 is basically not in contact with the side wall of the housing 120.

[0050] The separation component 130 includes at least a first segment 133, a second segment 134, and a third segment 135 along the vertical direction. The third segment 135 is located at the bottom of the separation component 130, and the bottom end of the separation component 130 is the bottom end of the third segment 135. The first segment 133 and the second segment 135 are perforated structures, while the second segment 134 is a closed structure. The perforated structure allows for fluid communication between the first and second cavities. In this application, communication generally refers to direct communication between two spaces or channels, where solids, liquids, and gases can flow between each other. Fluid communication generally refers to the flow of liquids and gases between two spaces or channels, while solids cannot flow between them. That is, the separation component can restrict solid waste from entering the second cavity 220 from the first cavity 210. Specifically, the perforated structure can be in the form of honeycomb holes, such as... Figure 6The third segment, 135, is shown. The diameter of the honeycomb holes is not less than 0.3 mm and not more than 3 mm. The honeycomb holes can also be other shapes, such as equilateral triangles, regular hexagons, etc. The perforated structure can also be completely perforated except for the frame, and then fluid communication between the first and second cavities is achieved by attaching a metal filter mesh to the completely perforated area, such as... Figure 6 The first section 133 is shown. Similarly, the metal filter screen adopts a honeycomb structure with a diameter of not less than 0.3 mm and not more than 2 mm. Likewise, the honeycomb holes on the metal filter screen can also be equilateral triangles, regular hexagons, or other shapes. The perforated structure is not limited to the two implementation methods mentioned above; any method that allows fluid communication while preventing solid communication is within the scope of protection of this application. The aforementioned solids refer to solids in a macroscopic sense; tiny particles whose dimensions in three-dimensional space are all smaller than the outer diameter of the honeycomb hole are not considered solids in this application. Similarly, the aforementioned separation component and the lower wall of the housing directly or indirectly abut against each other. This can be a seamless contact between the separation component and the housing, or it can have a tiny gap, as long as the aforementioned solid waste can be kept in the first cavity, i.e., unable to enter the second cavity from the first cavity, it is also within the scope of protection of this application.

[0051] Furthermore, such as Figure 3a and 3b As shown, the sewage tank 100 also includes a sewage inlet channel 150 disposed on the side wall of the sewage tank. The sewage inlet channel 150 is integrally formed with the sewage tank body 120, constituting part of the side wall of the tank body. The sewage inlet channel 150 includes an opening at the bottom of the sewage tank and a sewage inlet 151 at the other end of the sewage inlet channel 150. The sewage inlet 151 is directly connected to the first cavity 210. Dirty liquid entering through the opening at the bottom of the sewage tank flows through the sewage inlet channel to the sewage inlet 151, and then enters the first cavity 210 of the sewage tank through the sewage inlet 151. Figure 8 The wastewater tank 100 also includes a discharge channel 140 arranged parallel to the inlet channel 150 on its side wall. The discharge channel 140 is integrally formed with the wastewater tank body 120, constituting part of the side wall of the tank body. The discharge channel 140 includes a discharge inlet 141 directly communicating with the receiving cavity 121 and a discharge outlet located at the other end of the discharge channel. In order to discharge solid waste in the first cavity 210 into the wastewater tank through the discharge channel 140, the discharge inlet 141 is at least partially directly connected to the first cavity 210. Preferably, the discharge inlet 141 is completely connected to the first cavity 210. It should be understood that the discharge channel can also be located on the lower wall of the wastewater tank. When the discharge channel is opened, the dirty liquid in the wastewater tank, including the solid waste in the first cavity and the liquid in the second cavity, can be discharged downwards from the wastewater tank by its own weight.

[0052] By connecting the sewage inlet to the first chamber, dirty liquid entering the sewage tank enters the first chamber. Under the separation action of the separation component, liquid and gas can flow from the first chamber to the second chamber, while solid waste is confined within the first chamber. Thus, the separation component prevents solid waste from entering the second chamber from the first chamber. By connecting the sewage inlet at least partially to the first chamber, when the sewage tank is discharged, solid waste in the first chamber can directly enter the discharge channel, making it easier for solid waste to be discharged. Furthermore, when the sewage tank stores dirty liquid, confining solid waste within the first chamber and restricting its flow into the second chamber ensures that solid waste does not adhere to the side walls of the sewage tank, making cleaning the sewage tank easier for users.

[0053] Preferably, the soft rubber seal between the lower end of the separation component 130 and the lower wall of the housing 120 is a one-way sealing ring (not shown). The one-way sealing ring allows fluid to enter the first chamber 210 from the second chamber 220, but does not allow fluid to enter the second chamber 220 from the first chamber 210. In this way, some fine particles that enter the second chamber 220 with the fluid will deposit below the second chamber 220. When the sewage tank is discharged, the one-way sealing ring allows these deposited fine particles to quickly enter the first chamber 210 from the second chamber 220, and then be discharged from the sewage tank through the discharge channel 140, thereby making the sewage tank discharge more thorough. To further improve the discharge effect, such as... Figure 9 As shown, the lower part of the tank 120 protrudes downwards. This design makes it easier for the sewage inlet 141 to connect with the first cavity 210, and the bottom of the sewage tank has a certain effect on the accumulation of solid waste.

[0054] Furthermore, such as Figure 4 and Figure 5a As shown, the wastewater tank also includes a water level detection component 170 extending downwards from the tank cover 110. The water level detection component 170 is disposed on both sides of the separation component 130 and located within the second cavity 220. In the vertical direction, the water level detection component 170 extends to the middle of the first section 133. When the dirty liquid in the containing cavity rises to the position indicated by the water level detection component 170, the water level detection component 170 will output a corresponding signal to the external control device.

[0055] Second Embodiment

[0056] like Figure 10a and Figure 10bAs shown, in the second embodiment, the difference from the first embodiment lies in the cross-section observed perpendicular to the vertical direction. It can be seen that the separation component is roughly C-shaped. That is, compared to the first embodiment, the separation component 130' in the second embodiment is generally C-shaped. The two sides of the C-shaped cylindrical separation component 130' are sealed together by a soft rubber sealing strip and the side wall of the sewage tank. Compared to the first embodiment, the separation component 130' in the second embodiment has a simpler structure and lower manufacturing cost.

[0057] This application also provides a cleaning device 300 having the aforementioned wastewater tank, such as... Figure 11 As shown. The cleaning device includes a handle assembly 310, a body 320, and a cleaning component 330. The handle assembly 310 is for the user to hold and operate the cleaning device. A vacuum component (not shown) is installed inside the body 320. The vacuum component is fluidly connected to the aforementioned wastewater tank 100. When the vacuum component is working, it provides suction force to create a negative pressure in the receiving cavity of the wastewater tank 100 through the suction channel. The cleaning component 330 is connected to the aforementioned wastewater tank 100 and is used to perform wet cleaning on the surface to be cleaned. After cleaning, the negative pressure formed in the receiving cavity draws the dirty liquid generated on the surface to be cleaned into the receiving cavity through the suction channel.

[0058] This application also provides a cleaning system 400 having the above-mentioned cleaning equipment, such as Figure 12 As shown. The cleaning system 400 includes the aforementioned cleaning device 300 and a base station 410. The base station 410 provides a docking point for the cleaning device 300 to perform operations such as charging, water filling, and sewage discharge. A suction assembly (not shown) is installed inside the base station 410, which is connected to the sewage discharge channel of the sewage tank. When the suction assembly is working, it provides suction force to draw the dirty liquid in the sewage tank through the sewage discharge channel to the base station 410, where it is either stored or discharged to the outside.

[0059] In the cleaning system, when the cleaning equipment 300 cleans the floor, the suction force is provided by the vacuum component that connects to the air extraction channel. Since the air extraction inlet connects to the second chamber and the sewage inlet connects to the first chamber, the flow direction of the fluid in the sewage tank is from the first chamber to the second chamber. During this flow, some solid waste will adhere to the inner wall of the separation component under the influence of the flow force. When the cleaning equipment 300 is docked at the base station 410 and the base station 410 discharges sewage, the suction force is provided by the suction component that connects to the sewage tank discharge channel within the base station 410. Since the suction component connects to the discharge channel, and the discharge inlet of the discharge channel connects to the first chamber, the flow direction of the fluid in the sewage tank is from the second chamber to the first chamber. During this process, some solid waste adhering to the inner wall of the separation component will be washed away, then detached from the inner wall of the separation component, and subsequently discharged from the sewage tank along with the solid waste in the first chamber.

[0060] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent structural transformations or substitutions made based on the inventive concept of this application and the content of the description and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A sewage tank, characterized in that, include: The housing has a cavity for holding dirty liquids; A separation component, at least partially located within the receiving cavity and dividing the receiving cavity into at least a first cavity and a second cavity, the first cavity and the second cavity being in fluid communication, the separation component confining solid waste in dirty liquid entering the receiving cavity within the first cavity; A drain channel is provided for discharging dirty liquid from the receiving cavity into the receiving cavity. The drain channel has a drain inlet, and at least a portion of the drain inlet is connected to the first cavity. The separation component has a roughly D-shaped cross-section perpendicular to the vertical direction. The separation component is a D-shaped cylinder, and the planar portion of the D-shaped cylinder abuts against the side wall of the box body extending in the vertical direction. The separation component has at least a first section, a second section, and a third section along the vertical direction. The lower end of the separation component defines the third section. The first and third sections are at least partially hollowed out on the D-shaped cylindrical arc surface, allowing fluid communication between the first cavity and the second cavity. The second section is a closed structure. A one-way sealing ring is provided between the lower end of the separation component and the lower wall of the housing. The one-way sealing ring allows fluid to enter the first cavity from the second cavity but does not allow fluid to enter the second cavity from the first cavity.

2. The sewage tank according to claim 1, characterized in that, The sewage tank also includes a cover for covering the tank body, wherein the direction of the cover relative to the tank body is defined as upward and the direction of the tank body relative to the cover is defined as downward.

3. The sewage tank according to claim 2, characterized in that, The separation component and the box cover are fixed relative to each other, and the separation component and the box cover are integrally formed or the separation component is fixedly connected to the box cover.

4. The sewage tank according to claim 3, characterized in that, The separation component extends downward, and the lower wall of the housing at least partially defines the first cavity.

5. The sewage tank according to claim 2, characterized in that, The lower wall of the enclosure at least partially defines the sewage inlet.

6. The sewage tank according to claim 1, characterized in that, The sewage tank also includes a sewage inlet channel, which includes a sewage inlet that connects to the first cavity.

7. The sewage tank according to claim 1, characterized in that, The wastewater tank also includes an air extraction channel, which includes an air extraction inlet that connects to the second cavity.

8. A sewage tank, characterized in that, include: The housing has a cavity for holding dirty liquids; A separation component, at least partially located within the receiving cavity and dividing the receiving cavity into at least a first cavity and a second cavity, the first cavity and the second cavity being in fluid communication, the separation component restricting solid waste in the dirty liquid from entering the second cavity from the first cavity or from entering the first cavity from the second cavity; A sludge inlet channel is used to guide dirty liquid into the receiving cavity, the sludge inlet channel including a sewage inlet, the sewage inlet being connected to the first cavity; A drain channel is provided for discharging dirty liquid from the receiving cavity into the receiving cavity. The drain channel has a drain inlet, and at least a portion of the drain inlet is connected to the first cavity. The separation component has a roughly D-shaped cross-section perpendicular to the vertical direction. The separation component is a D-shaped cylinder, and the planar portion of the D-shaped cylinder abuts against the side wall of the box body extending in the vertical direction. The separation component has at least a first section, a second section, and a third section along the vertical direction. The lower end of the separation component defines the third section. The first and third sections are at least partially hollowed out on the D-shaped cylindrical arc surface, allowing fluid communication between the first cavity and the second cavity. The second section is a closed structure. A one-way sealing ring is provided between the lower end of the separation component and the lower wall of the housing. The one-way sealing ring allows fluid to enter the first cavity from the second cavity but does not allow fluid to enter the second cavity from the first cavity.

9. The sewage tank according to claim 8, characterized in that, The sewage tank also includes a cover for covering the tank body, wherein the direction of the cover relative to the tank body is defined as upward and the direction of the tank body relative to the cover is defined as downward.

10. The sewage tank according to claim 9, characterized in that, The separation component and the box cover are fixed relative to each other, and the separation component and the box cover are integrally formed or the separation component is fixedly connected to the box cover.

11. The sewage tank according to claim 10, characterized in that, The separation component extends downward, and the lower wall of the housing at least partially defines the first cavity.

12. The sewage tank according to claim 9, characterized in that, The lower wall of the enclosure at least partially defines the sewage inlet.

13. The sewage tank according to claim 8, characterized in that, The wastewater tank also includes an air extraction channel, which includes an air extraction inlet that connects to the second cavity.

14. A cleaning device, characterized in that, include: The sewage tank as described in any one of claims 1-13; A vacuum assembly, fluidly connected to the wastewater tank, is configured to provide suction to create a negative pressure within the containment cavity; A cleaning component, connected to the wastewater tank, is configured to clean the surface to be cleaned.

15. A cleaning system, characterized in that, include: The cleaning equipment and base station as described in claim 14, wherein the cleaning equipment can be docked at the base station; The base station includes a suction assembly, which is in fluid communication with the wastewater tank when the cleaning equipment is docked at the base station.

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