Sewage tank, cleaning device and cleaning system

Abstract

The application provides a sewage tank, a cleaning device and a cleaning system, and relates to the technical field of sewage tanks.The sewage tank comprises a tank body, the tank body is provided with a sewage suction pipeline and a suction port, the suction port is used for connecting a negative pressure source, so that sewage is sucked into the tank body from the sewage suction pipeline, a solid-liquid separation cavity and a liquid storage cavity are arranged in the tank body and are in communication with each other, and the sewage enters the liquid storage cavity after passing through the solid-liquid separation cavity, a negative pressure channel is formed in the tank body and is in communication with the outlet of the sewage suction pipeline and the suction port, so that negative pressure is generated at the outlet, a first baffle is further arranged in the tank body, the first baffle is movably arranged in the negative pressure channel, and the airflow passing capacity of the negative pressure channel at the first baffle gradually decreases during the process in which the sewage tank is rotated from a vertical posture to a lying posture.The sewage tank provided by the application can solve the problem that in the related art, liquid easily enters the negative pressure source of the host during the negative pressure suction process, and the negative pressure source is damaged.

Description

Technical Field

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

[0002] Floor scrubbers, as highly efficient floor cleaning appliances, are widely used in residential and commercial environments. Their core function lies in their ability to simultaneously clean wastewater and solid waste while cleaning the floor. Therefore, the design of the wastewater tank directly affects the machine's cleaning efficiency, ease of maintenance, and user experience.

[0003] Most mainstream floor scrubber waste tanks on the market currently adopt a "solid-liquid separation" design concept. This design typically includes a primary filter or basket for intercepting larger solid debris (such as hair, crumbs, food scraps, etc.) and a precision filter (usually a HEPA filter) for filtering fine dust and preventing it from entering the blower system. This structure aims to protect the blower motor and prevent the emission of secondary pollutants into the air.

[0004] However, in the related technologies, during the negative pressure suction process, the liquid in the sewage tank can easily wet the HEPA filter and enter the negative pressure source of the main unit, causing damage to the negative pressure source. Utility Model Content

[0005] This application provides a wastewater tank, cleaning equipment, and cleaning system. The wastewater tank can solve the problem in related technologies where, during the negative pressure suction process, liquid easily enters the negative pressure source of the main unit, causing damage to the negative pressure source.

[0006] The first aspect of this application provides a sewage tank, comprising:

[0007] The tank has a suction pipe and a suction port. The suction port is used to connect to a negative pressure source to draw sewage from the suction pipe into the tank.

[0008] The tank is equipped with an interconnected solid-liquid separation chamber and a liquid storage chamber. Wastewater enters the liquid storage chamber after passing through the solid-liquid separation chamber.

[0009] The box contains a negative pressure channel that connects the outlet and suction port of the suction pipe, so that negative pressure is generated at the outlet.

[0010] The tank is also equipped with a first baffle, which can be movably installed in the negative pressure channel. As the sewage tank rotates from a vertical position to a horizontal position, the airflow through the negative pressure channel at the first baffle gradually decreases.

[0011] In this embodiment of the application, to address the issue of liquid surging within the sewage tank and easily entering the negative pressure source of the main unit when the sewage tank is lying flat, a surge-proof structure is incorporated within the sewage tank. Furthermore, by placing the surge-proof structure, such as a first baffle, within the negative pressure channel, the possibility of liquid from the sewage tank entering the negative pressure source during negative pressure suction is further reduced. Moreover, by providing a movable first baffle within the negative pressure channel, when the sewage tank is in a vertical working position, the position of the first baffle maximizes the airflow through the negative pressure channel, ensuring the necessary airflow and negative pressure for suction. Due to gravity, the liquid is far from the suction port, resulting in minimal liquid being carried by the airflow. At this time, a larger airflow through the negative pressure channel allows for a sufficiently strong negative pressure at the suction pipe outlet, improving working (self-cleaning) efficiency. When the tank rotates from a vertical to a horizontal position, the first baffle moves accordingly, gradually reducing the airflow through the negative pressure channel. This creates a physical barrier within the negative pressure channel, effectively preventing liquid from passing through the airflow as it flows past the first baffle, thus preventing liquid from entering the negative pressure source through the suction port.

[0012] Furthermore, the solution in this embodiment of the application, by setting an movable first baffle in the negative pressure channel, eliminates the need for additional sensors, actuators, or complex control components, resulting in a simple structure, reduced costs, and reduced failure risks caused by complex structures, thereby improving the durability and stability of the entire sewage tank assembly.

[0013] In one possible implementation, when the sewage tank is in a horizontal position, the channel gap between the first baffle and the inner wall of the tank in the gas flow path of the negative pressure channel is the first gap; when the sewage tank is in a vertical position, the channel gap between the first baffle and the inner wall of the tank in the gas flow path of the negative pressure channel is the second gap; the first gap is smaller than the second gap.

[0014] This configuration allows for adjustment of the airflow channel size through mechanical changes in the physical gap, providing a direct, reliable, and precise control mechanism. When the wastewater tank is in an upright position, the first baffle forms a second gap (a larger gap) with the inner wall of the tank under gravity. This second gap provides a low-resistance, high-flow-rate core channel for the negative pressure airflow, ensuring that the suction performance of the cleaning equipment is not affected during operation or self-cleaning. When the wastewater tank is in a horizontal position, the first baffle changes position under gravity, creating a first gap (a smaller gap or near-zero gap) between the first baffle and the inner wall of the tank. This significantly reduced physical gap greatly increases the difficulty of liquid passage, effectively intercepting liquid and foam flowing towards the suction port from the storage chamber, thus providing direct and efficient physical protection for the HEPA filter and the negative pressure source.

[0015] In one possible implementation, when the sewage tank is in a horizontal position, the plane of the first baffle is set at an angle to the extension direction of the suction pipe; when the sewage tank is in a vertical position, the plane of the first baffle is parallel to the extension direction of the suction pipe; in the extension direction of the suction pipe, the first baffle is located on the side of the suction pipe and on the side of the suction pipe closer to the outlet.

[0016] With this configuration, when the wastewater tank is in a vertical position, the plane of the first baffle is parallel to the direction of the suction pipe. This design ensures that when the first baffle is fully open, its surface aligns with the main airflow direction, rather than obstructing the airflow path. This significantly reduces its obstruction and disturbance to the negative pressure airflow, effectively lowering duct resistance and airflow noise. It also ensures that during self-cleaning of the cleaning equipment base station, the negative pressure airflow can pass through with maximum efficiency and minimal energy loss, thereby guaranteeing the suction performance of the cleaning equipment.

[0017] When the wastewater tank is in a horizontal position, the plane of the first baffle is set at an angle (usually tending to be perpendicular) to the direction of the suction pipe. This change in orientation transforms the first baffle from a "guide plate" into a "blocking plate." Its surface laterally intercepts potential backflow paths of airflow / liquid flow, forming an effective physical barrier to prevent liquid carried by the airflow from entering the HEPA filter and negative pressure source from the suction port.

[0018] One possible implementation also includes:

[0019] The second baffle is located in the negative pressure channel and between the suction port and the first baffle. The second baffle has ventilation holes.

[0020] In one possible implementation, a mesh bag structure is also included, which is installed inside the box, and the sewage discharged from the outlet of the suction pipe enters the liquid storage chamber after passing through the mesh bag structure.

[0021] By incorporating a second baffle, a dual-redundant protection system is formed with the first baffle, significantly enhancing the safety of the HEPA filter and the negative pressure source. The second baffle acts as a fixed physical barrier, directly intercepting and collecting residual liquid, preventing it from entering the suction port and the subsequent precision HEPA filter and negative pressure source (fan). This redundant design significantly reduces the risk of single-point failure, providing reliable protection for core components. The inclusion of vents prevents the second baffle itself from creating unnecessary airflow resistance, ensuring uninterrupted suction. Furthermore, the solid portion of the second baffle itself acts as an additional obstacle, further colliding, intercepting, and collecting any small amounts of moisture and fine particles that may be carried from the direction of the first baffle, causing them to condense and fall back into the liquid storage chamber. This optimizes the dryness of the airflow path and reduces the filtration burden on the downstream HEPA filter.

[0022] In one possible implementation, a water-blocking baffle is also included. The water-blocking baffle is set in the negative pressure channel, and the negative pressure airflow passes through the water-blocking baffle, the first baffle and the second baffle in sequence to reach the suction port.

[0023] By incorporating water-resistant baffles, the problem of atomized water droplets and foam carried in the airflow can be solved. These tiny droplets are difficult for a simple first baffle to effectively intercept. The baffle structure efficiently separates these water vapors from the airflow through collision and condensation effects, causing them to condense into larger droplets and fall back into the reservoir. This greatly optimizes the airflow quality leading to the suction port, making it drier and effectively reducing the moisture load on the downstream HEPA filter, slowing down its wetting rate and extending its service life. Furthermore, the water-resistant baffles, first baffle, and second baffle can form a multi-layered physical barrier for tiered interception, significantly improving the reliability of protection. The series connection of multiple components is not a simple stacking; the water-resistant baffles can be designed with a guiding function, capable of organizing and regulating turbulent airflow from the reservoir direction, allowing it to flow more smoothly into subsequent channels. This helps reduce airflow resistance and noise throughout the duct system, positively contributing to maintaining the suction performance of the cleaning equipment.

[0024] In one possible implementation, the first baffle has a rotating shaft on each side; the rotating shaft is rotatably arranged relative to the housing so that the first baffle can swing within the negative pressure channel.

[0025] This design simplifies the connection between the first baffle and the housing, allowing the first baffle to swing naturally under gravity. This motion method is simple and reliable, requiring no complex guide rails or linkage mechanisms. It ensures the certainty and consistency of the first baffle's switching between vertical and horizontal states, avoiding risks of jamming or misalignment, and extending its service life.

[0026] In one possible implementation, the first baffle includes a first baffle plate and a second baffle plate connected together; in the vertical direction, the first baffle plate is located above the rotating shaft, and the second baffle plate is located below the rotating shaft, and the weight of the first baffle plate is less than the weight of the second baffle plate, so that the first baffle plate is always in a vertical state.

[0027] By setting the weight of the first baffle to be less than that of the second baffle, the center of gravity of the entire first baffle is always located below the axis of rotation. According to the principles of physics, this is a stable equilibrium state. Regardless of whether the wastewater tank is vertical, tilted, or lying flat, it ensures that the plane of the first baffle remains parallel to the current direction of gravity (i.e., the vertical direction) under the influence of gravity. This guarantees that the channel gaps (first gap and second gap) formed between the first baffle and the inner wall of the tank depend only on the tank's posture and will not experience uncontrollable swaying, greatly improving the accuracy and reliability of the airflow control function. Since gravity is the most direct and immediate force, this counterweight structure allows the first baffle to adjust to the predetermined position immediately and seamlessly following changes in the wastewater tank's posture, without any response lag. This instantaneous response ensures that the switch from "high-flow operating state" to "low-flow protection state" is completed instantly, preventing protection gaps caused by slow response of the first baffle during posture changes, which could lead to liquid being sucked into the suction port. This simple first baffle structure reduces assembly difficulty and cost.

[0028] In one possible implementation, when the sewage tank is in a horizontal position, the water-blocking strip is parallel to the vertical projection of the suction pipe.

[0029] This parallel projection relationship means that the arrangement of the water-blocking strips is in line with the direction of the main airflow, rather than blocking it laterally. This minimizes its resistance to the negative pressure airflow and ensures the system's working efficiency.

[0030] In one possible implementation, the housing includes an outer shell and an inner frame, with the inner frame mounted on the outer shell; a water-proof baffle is located on the inner frame, and the inner frame also has a solid-liquid separation plate, which divides the cavity of the outer shell into a liquid storage cavity and a solid-liquid separation cavity; the outer shell has a first pipe, and the inner frame has a second pipe, which is sleeved outside the first pipe, and the first pipe and the second pipe together form a suction pipe.

[0031] This design allows complex internal structures (such as water-blocking strips, solid-liquid separation plates, and the second pipe) to be integrated into a single internal frame, making it a functional module. This reduces assembly difficulty. By nesting the suction pipe between the first pipe on the outer shell and the second pipe on the inner frame, a physical double-sealing mechanism is created. This significantly improves the pressure resistance and reliability of the suction pipe, reducing leakage problems caused by pipe wall defects.

[0032] The second aspect of this application provides a cleaning device, including a device body and a wastewater tank as described in any of the first aspects above.

[0033] A third aspect of this application provides a cleaning system, including a base station and the cleaning equipment described in the second aspect. Attached Figure Description

[0034] 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of a sewage tank provided in an embodiment of this application;

[0036] Figure 2 This is a cross-sectional structural diagram of a sewage tank provided in an embodiment of this application;

[0037] Figure 3 A cross-sectional structural diagram of a sewage tank in a lying position is provided in an embodiment of this application;

[0038] Figure 4 A cross-sectional structural diagram of a sewage tank in a vertical position is provided as an embodiment of this application;

[0039] Figure 5 This is a schematic diagram of another cross-sectional structure of a sewage tank provided in an embodiment of this application;

[0040] Figure 6 This is a schematic diagram of another cross-sectional structure of a sewage tank provided in an embodiment of this application;

[0041] Figure 7 This is a partial structural diagram of a sewage tank provided in an embodiment of this application.

[0042] Figure label:

[0043] 100-Sewage tank;

[0044] 110 - Housing; 101 - Suction pipe; 102 - Suction port; 103 - Outer shell; 1031 - First pipe; 104 - Inner frame; 1041 - Waterproof baffle; 1042 - Solid-liquid separation plate; 1043 - Second pipe; 1044 - Mounting bracket; 1045 - Rotary hole; 105 - Outlet;

[0045] 111-Solid-liquid separation chamber; 1111-First separation chamber; 1112-Second separation chamber; 112-Liquid storage chamber; 113-Negative pressure channel; 1131-Vertical flow section; 1132-Direct flow section;

[0046] 120 - First baffle; 120a - First end; 120b - Second end; 121 - First baffle plate; 122 - Second baffle plate; 123 - Rotating shaft; 124 - Clearance notch;

[0047] 130 - Second baffle; 131 - Vent hole;

[0048] 140 - Mesh bag structure; 141 - Mesh bag body; 142 - Connecting frame;

[0049] 150 - Mounting bracket; 151 - Card slot; 152 - Flexible pressure tongue;

[0050] 160-HEPA filter. Detailed Implementation

[0051] As described in the background section, in related technologies, the wastewater tank is highly susceptible to liquid from wetting the HEPA filter and entering the negative pressure source. Once the HEPA filter becomes wet, its permeability decreases drastically, leading to reduced suction power, malfunctions, and harsh noise, resulting in a poor user experience. Liquid entering the negative pressure source can damage it and affect its normal operation.

[0052] To address the aforementioned issues, this application provides a wastewater tank, cleaning equipment, and cleaning system. By installing a movable first baffle in the wastewater tank, the state of the first baffle can be automatically changed according to the placement of the wastewater tank (different placements correspond to different working states), thereby altering the passageway state within the negative pressure channel. This creates a physical barrier within the negative pressure channel, effectively preventing liquid from passing through the airflow as it flows past the first baffle, thus effectively preventing liquid from entering the negative pressure source through the suction port.

[0053] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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 some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0054] Figure 1 This is a schematic diagram of the structure of a sewage tank provided in an embodiment of this application. Figure 2 This is a cross-sectional structural diagram of a sewage tank provided in an embodiment of this application. Wherein, Figure 1 The angle shown indicates that the sewage tank is in a tilted position. Figure 2 The angle shown indicates that the sewage tank is in a lying position.

[0055] It should be noted that, Figure 2 and Figure 3 The dashed line with arrows indicates the flow direction of gas, while the solid line with arrows indicates the flow direction of liquid.

[0056] For ease of description, the direction of the sewage tank's extension is taken as the x-direction in the diagram, and the vertical direction is taken as the z-direction.

[0057] It should be noted that when the sewage tank is in a horizontal position, its extension direction is perpendicular to the vertical direction. When the sewage tank is in a vertical position, its extension direction is the same as the vertical direction.

[0058] like Figure 1 and Figure 2 As shown in the figure, this application embodiment provides a sewage tank, which may include a tank body 110. The tank body 110 has a suction pipe 101 and a suction port 102. The suction port 102 is used to connect to a negative pressure source (not shown in the figure) to draw sewage from the suction pipe 101 into the tank body 110. The extension direction of the sewage tank 100 is the same as the extension direction of the suction pipe 101.

[0059] For example, a HEPA filter 160 can typically be placed between the intake 102 and the negative pressure source. After the airflow exits from the intake 102, it passes through the HEPA filter 160 before entering the negative pressure source. The negative pressure source can typically be a fan structure. In this embodiment, the specific type of negative pressure source is not further limited.

[0060] See also Figure 2 As shown, the housing 110 is provided with a solid-liquid separation chamber 111 and a liquid storage chamber 112 that are interconnected. Wastewater enters the liquid storage chamber 112 after passing through the solid-liquid separation chamber 111. A negative pressure channel 113 is formed inside the housing 110, which connects the outlet 105 of the suction pipe 101 and the suction port 102, so that the outlet 105 generates negative pressure.

[0061] The housing 110 is also provided with a first baffle 120. The first baffle 120 can be movably disposed in the negative pressure channel 113. The first baffle 120 is configured to change its setting state in the negative pressure channel 113 according to the placement posture of the sewage tank 100, so as to adjust the airflow through the negative pressure channel 113 at the first baffle 120.

[0062] For example, during the process of the sewage tank 100 rotating from a vertical position to a horizontal position, the airflow through the negative pressure channel 113 at the first baffle 120 gradually decreases. That is, the airflow through the negative pressure channel 113 at the first baffle 120 is the largest when the sewage tank 100 is in a vertical position, and the airflow through the negative pressure channel 113 at the first baffle 120 is the smallest when the sewage tank 100 is in a horizontal position.

[0063] It should be noted that the wastewater tank 100 is typically mounted on the main body of the cleaning equipment and is fixed in position relative to the main body. Therefore, the placement orientation of the wastewater tank 100 is the same as that of the cleaning equipment. In this embodiment, the placement orientation of the wastewater tank 100 is the same as that of the cleaning equipment.

[0064] Cleaning equipment can typically be positioned in different ways to perform different tasks. For example, when the cleaning equipment is in an upright position, it can perform tasks such as charging, self-cleaning, or upright cleaning. When the cleaning equipment is in a lying position, it can perform tasks such as cleaning low spaces. When the cleaning equipment is in a tilted position, it can perform regular cleaning tasks.

[0065] In this embodiment of the application, the sewage tank 100, by providing a movable first baffle 120, when the sewage tank 100 is in a vertical working posture (see...), Figure 4 As shown), the position of the first baffle 120 maximizes the airflow through the negative pressure channel 113, ensuring the airflow and negative pressure required for suction. Due to gravity, the liquid is far from the suction port 102, so very little liquid is carried by the airflow. At this time, the airflow through the negative pressure channel is large, so that the outlet 105 of the suction pipe 101 can generate a sufficiently strong negative pressure, which can improve the working (self-cleaning) efficiency.

[0066] When the housing 110 rotates from a vertical position to a horizontal position, the first baffle 120 moves accordingly, gradually reducing the airflow through the negative pressure channel 113 at the first baffle 120. This creates a physical barrier within the negative pressure channel 113, effectively preventing liquid from passing through the airflow as it passes through the first baffle 120, thereby effectively preventing liquid from entering the negative pressure source through the suction port 102.

[0067] It is understood that in embodiments where a HEPA filter 160 is provided between the suction port 102 and the negative pressure source, liquid contamination of the HEPA filter 160 can be effectively prevented, thereby extending the service life of the HEPA filter 160.

[0068] Furthermore, the solution in this embodiment of the application, by setting an movable first baffle 120 in the negative pressure channel 113, eliminates the need for additional sensors, actuators, or complex control components, resulting in a simple structure, reduced costs, and reduced failure risks caused by complex structures, thereby improving the durability and stability of the entire sewage tank assembly.

[0069] See Figure 3 As shown, when the sewage tank 100 is in a lying position, the channel gap of the negative pressure channel 113 formed between the first baffle 120 and the inner wall of the tank 110 is the first gap L1.

[0070] like Figure 4 As shown, when the sewage tank 100 is in a vertical position, the channel gap formed between the first baffle 120 and the inner wall of the tank 110 in the gas flow path of the negative pressure channel 113 is the second gap L2. The first gap L1 is smaller than the second gap L2.

[0071] It should be noted that, see Figure 5 As shown, the top of the first baffle 120 in the figure can be regarded as the first end 120a of the first baffle 120, and the bottom of the first baffle 120 in the figure can be regarded as the second end 120b of the first baffle 120. The first gap L1 is the distance from the first end 120a to the inner wall of the box 110. The second gap L2 is the distance from the plane where the second baffle is located to the inner wall of the box 110.

[0072] This configuration allows for adjustment of the airflow channel size through mechanical changes in the physical gap, providing a direct, reliable, and precise control mechanism. When the wastewater tank 100 is in a vertical position, the first baffle 120 forms a second gap (a larger gap) with the inner wall of the tank body 110 under the influence of gravity. This second gap provides a low-resistance, high-flow-rate core channel for the negative pressure airflow, ensuring that the suction performance of the cleaning equipment is not affected during operation or self-cleaning.

[0073] When the wastewater tank 100 is in a lying position, the first baffle 120 changes position under the action of gravity, so that a first gap (small gap or close to zero gap) is formed between the first baffle 120 and the inner wall of the tank body 110. This significantly reduced physical gap greatly increases the difficulty of liquid passage and can effectively intercept liquid and foam in the liquid storage chamber 112 that are trying to rush towards the suction port 102, thereby providing direct and efficient physical protection for the HEPA filter 160 and the negative pressure source.

[0074] In some embodiments, such as Figure 3 As shown, when the sewage tank 100 is in a lying position, the plane of the first baffle 120 is set at an angle to the extension direction of the suction pipe 101. Figure 4 As shown, when the sewage tank 100 is in a vertical position, the plane of the first baffle 120 is parallel to the extension direction (x direction) of the suction pipe 101. In the extension direction (x direction) of the suction pipe 101, the first baffle 120 is located on the side of the suction pipe 101 and is located on the side of the suction pipe 101 near the outlet 105.

[0075] It should be noted that the plane in which the first baffle 120 is located refers to the plane in which the first baffle 120 is considered as a very thin sheet.

[0076] For example, when the sewage tank 100 is in a lying position, the angle between the plane of the first baffle 120 and the extension direction of the suction pipe can be between 85 and 95 degrees. For instance, it can be 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, or 95 degrees. That is, when the sewage tank 100 is in a lying position, the plane of the first baffle 120 is nearly perpendicular to the extension direction (x-direction) of the suction pipe 101. The accompanying drawings in this embodiment illustrate this with the example of the plane of the first baffle 120 being perpendicular to the extension direction (x-direction) of the suction pipe 101.

[0077] With this configuration, when the wastewater tank 100 is in a vertical position, the plane of the first baffle 120 is parallel to the extension direction (x-direction) of the suction pipe 101. This configuration ensures that when the first baffle 120 is fully open, its surface aligns with the main airflow direction, rather than obstructing the airflow path. This significantly reduces its obstruction and disturbance to the negative pressure airflow, effectively lowering duct resistance and airflow noise. It also ensures that during self-cleaning of the cleaning equipment base station, the negative pressure airflow can pass through with maximum efficiency and minimal energy loss, thereby guaranteeing the suction performance of the cleaning equipment.

[0078] When the wastewater tank 100 is in a horizontal position, the plane of the first baffle 120 is set at an angle (usually tending to be perpendicular) to the extension direction (x direction) of the suction pipe 101. This change in position transforms the first baffle from a "guide plate" into a "blocking plate". Its plate surface laterally intercepts potential backflow paths of airflow / liquid flow, forming an effective physical barrier to prevent liquid carried by the airflow from entering the HEPA filter 160 and the negative pressure source from the suction port.

[0079] By placing the first baffle 120 on the side of the suction pipe 101, rather than directly in front or behind, the space on the side of the suction pipe 101 inside the tank 110 is cleverly utilized. This avoids spatial interference between the first baffle 120 and the main fluid channel, making the internal structure of the entire sewage tank 100 more compact and efficient. There is no need to significantly increase the tank volume to add this function, which is conducive to the miniaturization design of the product.

[0080] For example, when the sewage tank 100 is in a horizontal position, the flow rate of negative pressure airflow through the negative pressure channel 113 at the first baffle 120 is a first flow rate. When the sewage tank 100 is in a vertical position, the flow rate of negative pressure airflow through the negative pressure channel 113 at the first baffle 120 is a second flow rate. The first flow rate is less than the second flow rate. When the sewage tank 100 is in an inclined position, the flow rate of negative pressure airflow through the negative pressure channel 113 at the first baffle 120 is a third flow rate. The third flow rate is greater than the first flow rate and less than the second flow rate.

[0081] Thus, when the wastewater tank 100 is in an upright position (i.e., placed on the base station for charging or self-cleaning), the first baffle 120 keeps the negative pressure channel 113 in a second flow rate (larger throughput) state. This minimizes the obstruction of the negative pressure airflow through the negative pressure channel 113, providing full and undamaged suction for ground cleaning or base station self-cleaning processes, fully guaranteeing the core performance of the cleaning equipment host. When the wastewater tank is in a horizontal position (i.e., removed by the user for emptying, rinsing, or other maintenance operations), the first baffle 120 automatically adjusts its position, keeping the negative pressure channel 113 in a first flow rate (smaller throughput) state. This allows the first baffle 120 to block liquid in the airflow to the greatest extent, reducing surges and preventing liquid from entering the negative pressure source (or the HEPA filter 160 and the negative pressure source) through the suction port, thus providing a crucial physical barrier for critical components in the most demanding maintenance scenarios.

[0082] By setting the third flow rate when the wastewater tank 100 is in an inclined position to be greater than the first flow rate and less than the second flow rate, it means that the movement of the first baffle (120) can provide a continuous or at least intermediate adjustment capability according to different inclination angles. This allows the design to adapt to both "working" and "thorough maintenance" extreme states, ensuring that necessary air permeability is maintained to a certain extent under different postures, ensuring that the cleaning equipment has a certain suction power and a certain protective performance, effectively suppressing liquid from wetting the HEPA filter 160, and achieving a balance between safety and functionality. By setting the gradient flow rate, the flux change of the negative pressure channel 113 is a gradual process rather than a sudden switch. This avoids violent fluctuations in airflow and prevents abnormal noises, surges, or instantaneous impacts on the negative pressure source that may occur due to sudden changes in air pressure during posture changes, which is beneficial to improving the working stability and durability of the entire duct system.

[0083] In one possible implementation, see [link to previous section] Figure 3 As shown, the negative pressure channel 113 includes at least a connected vertical flow section 1131 and a direct flow section 1132. The extension direction of the vertical flow section 1131 is perpendicular to the extension direction (x-direction) of the sewage tank 100, and the extension direction of the direct flow section 1132 is consistent with the extension direction (x-direction) of the sewage tank. The direct flow section 1132 is located outside the suction pipe 101. The first baffle 120 is swayably disposed within the direct flow section 1132, and the plane of the first baffle 120 is always parallel to the vertical direction (z-direction). This ensures that when the sewage tank 100 is in a horizontal position, the plane of the first baffle 120 is perpendicular to the extension direction of the direct flow section 1132, and when the sewage tank 100 is in a vertical position, the plane of the first baffle 120 is parallel to the extension direction of the direct flow section 1132.

[0084] It should be noted that the names of the vertical flow section 1131 and the DC flow section 1132 here do not constitute a limitation on the direction of the negative pressure channel 113, but are only used as a means to aid understanding, and are consistent with Figure 2 The name corresponding to the position of the sewage tank 100.

[0085] In one possible implementation, the first baffle 120 has rotating shafts 123 on both sides. The rotating shafts 123 are rotatably mounted relative to the housing 110, allowing the first baffle 120 to swing within the negative pressure channel 113. This configuration simplifies the connection between the first baffle 120 and the housing 110, allowing the first baffle 120 to swing naturally under gravity. This motion method is simple and reliable, requiring no complex guide rails or linkage mechanisms, ensuring the certainty and consistency of the first baffle 120's switching between vertical and horizontal states, avoiding risks of jamming or misalignment, and extending its service life.

[0086] like Figure 5 As shown, the first baffle 120 may include a first baffle plate 121 and a second baffle plate 122 connected together. In the vertical direction (in the z direction), the first baffle plate 121 is located above the rotating shaft 123, and the second baffle plate 122 is located below the rotating shaft 123. The weight of the first baffle plate 121 is less than the weight of the second baffle plate 122, so that the plane containing the first baffle 120 always remains parallel to the vertical direction (in the z direction).

[0087] like Figure 5 As shown, the first baffle 120 has an overall U-shaped structure, and two second baffles 122 are located on both sides of the first baffle 121 and extend away from the first baffle 121. The two second baffles 122 are symmetrically arranged with respect to the central axis of the first baffle 121, and the two second baffles 122 have identical structures. The sum of the weights of the two second baffles 122 is greater than the weight of the first baffle 121.

[0088] By setting the weight of the first baffle 121 to be less than the weight of the second baffle 122, the center of gravity of the entire first baffle is always located below the rotating shaft 123. According to the principles of physics, this is a stable equilibrium state. Regardless of whether the sewage tank 100 is in a vertical, tilted, or flat position, it can be ensured that the plane of the first baffle 120 remains parallel to the current direction of gravity (i.e., the vertical direction z) under the action of gravity. This ensures that the channel gaps (first gap and second gap) formed between the first baffle 120 and the inner wall of the tank 110 depend only on the posture of the tank 110, and will not experience uncontrollable shaking, greatly improving the accuracy and reliability of the airflow control function.

[0089] Since gravity acts directly and without delay, this counterweight structure allows the first baffle 120 to instantly and seamlessly adjust to its predetermined position in response to changes in the posture of the wastewater tank 100, eliminating any response lag. This instantaneous response ensures that the switch from "high-flow operating state" to "low-flow protection state" is completed instantly, preventing any protection gaps caused by slow response of the first baffle 120 during posture changes, which could result in liquid being sucked into the suction port 102. This simple structure of the first baffle 120 reduces assembly difficulty and costs.

[0090] See also Figure 3 and Figure 5 As shown, the sewage tank 100 may include a second baffle 130, which is disposed in the negative pressure channel 113 and located between the suction port 102 and the first baffle 120. The second baffle 130 is provided with a vent hole 131.

[0091] For example, the outer periphery of the second baffle 130 and the inner wall of the housing 110 can be sealed together by a sealing element. This ensures that liquid will not enter the HEPA filter and the negative pressure source through the gap between the second baffle 130 and the inner wall of the housing 110. The sealing element can be a sealing ring or similar structure; in this embodiment, the specific type of sealing element is not further limited.

[0092] By setting the second baffle 130, a dual-redundant protection system can be formed with the first baffle 120, greatly improving the safety of the HEPA filter 160 and the negative pressure source. The second baffle 130 will act as a fixed physical barrier, directly intercepting and collecting these residual liquids, preventing liquids from entering the suction port 102 and the subsequent precision HEPA filter 160 and negative pressure source (fan).

[0093] This redundant design significantly reduces the risk of single-point failure, providing reliable protection for core components. The vents prevent the second baffle 130 from creating unnecessary airflow resistance, ensuring uninterrupted suction. Furthermore, the solid portion of the second baffle 130 itself acts as an additional obstacle, further colliding, intercepting, and converging any small amounts of water vapor and fine particles that may be carried from the direction of the first baffle 120, causing them to condense and fall back into the liquid storage chamber 112. This optimizes the dryness of the airflow and reduces the filtration burden on the downstream HEPA filter 160.

[0094] In some embodiments, the number of vent holes 131 can be multiple, and the multiple vent holes 131 are evenly distributed on the second baffle 130. The shape of the vent holes 131 can be rectangular, circular, triangular, elliptical, or irregular. In the embodiments of this application, the shape and number of vent holes 131 are not further limited.

[0095] like Figure 6As shown, the sewage tank may also include a water-proof baffle 1041, which is disposed in the negative pressure channel 113. The negative pressure airflow passes through the water-proof baffle 1041, the first baffle 120 and the second baffle 130 in sequence to reach the suction port 102.

[0096] For example, wastewater drawn in from the suction pipe 101 enters the solid-liquid separation chamber 111 through the outlet of the suction pipe 101. It first passes through the water-blocking baffle 1041 within the negative pressure channel 113, and then through the first baffle 120 and the second baffle 130 to reach the suction port 102. The solid-liquid separation chamber 111 is connected to the negative pressure channel 113, and the water-blocking baffle 1041 is disposed between the solid-liquid separation chamber 111 and the negative pressure channel 113. For example, the water-blocking baffle 1041 can be disposed at the interface between the solid-liquid separation chamber 111 and the negative pressure channel 113.

[0097] By incorporating a water-blocking baffle 1041, the problem of atomized water droplets and foam carried in the airflow can be solved. These tiny droplets are difficult to effectively intercept by the first baffle 120 alone. The water-blocking baffle 1041 efficiently separates these water vapors from the airflow through collision and condensation effects, causing them to condense into larger water droplets and fall back into the liquid storage chamber 112. This greatly optimizes the airflow quality leading to the suction port 102, making it drier, thereby effectively reducing the moisture load on the downstream HEPA filter, slowing down its wetting rate, and extending its service life.

[0098] Furthermore, the water-proof baffle 1041, the first baffle 120, and the second baffle 130 can form a multi-layered physical barrier for progressive interception, greatly improving the reliability of protection. The series connection of multi-stage components is not a simple stacking; the water-proof baffle 1041 can be designed with a flow-guiding structure, which can organize and regulate the turbulent airflow from the direction of the liquid storage chamber, allowing it to flow more smoothly into subsequent channels. This helps reduce the airflow resistance and noise of the entire duct system, and has a positive auxiliary effect on maintaining the suction performance of the cleaning equipment.

[0099] For example, such as Figure 6 As shown, when the sewage tank 100 is in a horizontal position, the projection of the baffle strip 1041 and the suction pipe 101 in the vertical direction (z-direction) is parallel. That is, the overall extension direction of the baffle strip 1041 is the same as the extension direction of the suction pipe 101. This parallel projection relationship means that the arrangement of the baffle strip 1041 follows the direction of the main airflow, rather than obstructing it laterally. This minimizes its resistance to the negative pressure airflow and ensures the system's efficiency.

[0100] It should be noted that the term "parallel" in the embodiments of this application refers to parallelism in a macroscopic sense, that is, approximately parallel. That is, parallelism is allowed within a certain error range; for example, geometric relationships with an included angle within 5 degrees can be considered as parallel to each other.

[0101] It should be noted that, Figure 6 The first baffle 120 in the attached diagram shows the position of the wastewater tank 100 when it is in a horizontal position. For ease of viewing, Figure 6 The viewpoint of the sewage tank is rotated to clearly show the positional relationship between the water-blocking baffle 1041 and the suction pipe 101.

[0102] In some embodiments, the number of water-blocking baffles 1041 can be multiple. For example, two, four or more can be symmetrically arranged on both sides of the suction pipe 101. In this embodiment, the number of water-blocking baffles 1041 is not further limited.

[0103] Of course, in other embodiments, the water-blocking strip 1041 may be set at a certain angle to the extension direction of the suction pipe 101. In this embodiment, the setting direction of the water-blocking strip 1041 is not further limited.

[0104] Combination Figure 4 and Figure 7 As shown, the wastewater tank may also include a mesh bag structure 140, which is mounted on a mounting bracket 150 inside the tank body 110. At least a portion of the mesh bag structure 140 is located inside the solid-liquid separation chamber 111. Wastewater discharged from the outlet 105 of the suction pipe 101 passes through the mesh bag structure 140 and then enters the liquid storage chamber 112 from the solid-liquid separation chamber 111.

[0105] By setting the mesh bag structure 140, the solid-liquid separation chamber 111 can be divided into two interconnected parts. One part is the section between the mesh bag structure 140 and the outlet 105 of the suction pipe 101, which is shown as the first separation chamber 1111 in the figure. The other part is the section between the mesh bag structure 140 and the solid-liquid separation plate 1042, which is shown as the second separation chamber 1112 in the figure. The first separation chamber 1111 and the second separation chamber 1112 are interconnected.

[0106] With this configuration, the mesh bag structure 140 is directly placed in the only flow path of the sewage, acting as an essential filtration barrier. The gas-liquid-solid mixture discharged from the suction pipe 101 must penetrate the mesh of the mesh bag to enter the storage chamber 112. This design ensures that all suctioned material is filtered by the mesh bag structure. Solid waste in the sewage (such as hair, paper scraps, particles, and flocculent matter) is efficiently intercepted and retained inside or on the surface of the mesh bag structure 140, thus achieving extremely thorough solid-liquid separation and ensuring that what remains in the storage chamber 112 is liquid. This reduces the amount of solid waste in the storage chamber 112, preventing its accumulation and putrefaction, and reducing the difficulty of cleaning the sewage tank.

[0107] The mesh bag structure 140 acts as a front-end physical barrier, effectively intercepting lightweight and easily flying hair and fibers, preventing them from penetrating the solid-liquid separation chamber and entering the negative pressure channel 113 with the airflow. This avoids them from entangled in the fan impeller of the negative pressure source or prematurely clogging the HEPA filter 160, thus playing an important protective role for the core pneumatic components.

[0108] See also Figure 7 As shown, a mounting frame 150 is provided inside the solid-liquid separation chamber 111, and a mesh bag structure 140 is mounted on the mounting frame 150. For example, the mesh bag structure 140 may include a mesh bag body 141 and a connecting frame 142. The connecting frame 142 is disposed on the opening of the mesh bag body 141, and the connecting frame 142 is detachably mounted on the mounting frame 150 so that the mesh bag body 141 is mounted on the mounting frame 150 via the connecting frame 142.

[0109] For example, the mesh bag body 141 is a flexible structure that can be deformed so that the mesh bag body 141 can be more easily placed in the solid-liquid separation chamber 111.

[0110] In one possible implementation, the mounting bracket 150 has a slot 151 at one end and a resilient pressure tongue 152 at the other end. One end of the connecting frame 142 is engaged in the slot 151, and the other end cooperates with the resilient pressure tongue 152, so that the connecting frame 142 is detachably connected to the mounting bracket 150.

[0111] By setting up the mounting bracket 150 and detachably mounting the mesh bag structure 140 onto it, the mesh bag structure 140 can be quickly and reliably assembled and disassembled, greatly improving user experience and maintenance efficiency. The mounting bracket 150 includes a slot 151 and an elastic pressure tongue 152. During installation, the user simply inserts one end of the connecting frame 142 into the slot 151 for positioning, then presses down on the other end to overcome the elastic force of the pressure tongue 152, locking it in place. During disassembly, simply lift the end of the connecting frame 142 that engages with the elastic pressure tongue 152 to release it from the pressure tongue, allowing for easy removal. The entire process requires no tools, is simple, intuitive, quick, and provides a secure connection.

[0112] Combination Figure 4 and Figure 7As shown, the housing 110 may include an outer shell 103 and an inner frame 104, with the inner frame 104 installed inside the outer shell 103. A water-blocking baffle 1041 is located on the inner frame 104, and the inner frame 104 also has a solid-liquid separation plate 1042, which divides the cavity inside the outer shell 103 into a liquid storage cavity 112 and a solid-liquid separation cavity 111. The outer shell 103 has a first pipe 1031, and the inner frame 104 has a second pipe 1043, which is sleeved outside the first pipe 1031. The first pipe 1031 and the second pipe 1043 together form a suction pipe 101.

[0113] This design allows the complex internal structure (such as the water-blocking baffle 1041, solid-liquid separation plate 1042, and second pipe 1043) to be integrated onto a single inner frame 104, making it a functional module. This reduces assembly difficulty. By fitting the suction pipe 101 between the first pipe 1031 on the outer shell 103 and the second pipe 1043 on the inner frame 104, a physical double-sealing mechanism is formed. This significantly improves the pressure-bearing capacity and reliability of the suction pipe 101, reducing leakage problems caused by pipe wall defects.

[0114] In one possible implementation, the inner frame 104 is also provided with a mounting bracket 1044, the mounting bracket 1044 is provided with a rotating hole 1045, and the rotating shaft 123 passes through the rotating hole 1045 and rotates in cooperation with the rotating hole 1045.

[0115] By providing a mounting bracket on the inner frame 104, the mounting bracket 1044 can serve as a reinforcing structure of the inner frame 104, providing robust support for the rotating shaft 123 and ensuring that the first baffle 120 can operate smoothly and quietly throughout its entire lifespan.

[0116] Combination Figure 5 and Figure 6 As shown, at least a portion of the second pipe 1043 is located within the negative pressure channel 113, and the first baffle 120 has an avoidance notch 124 that matches the outer wall of the second pipe 1043.

[0117] By arranging a portion of the second pipe 1043 within the negative pressure channel 113, efficient reuse of the internal space of the tank can be achieved. This allows for full utilization of the cross-sectional area of ​​the negative pressure channel 113, rather than leaving it as an empty passage. The clearance notch 124 on the first baffle 120 ensures that the first baffle 120 can precisely pass around the protruding fixed structure of the second pipe 1043 when rotating and swinging, without increasing the size of the entire tank 110 or the negative pressure channel 113 to avoid it. This allows both the fixed second pipe 1043 and the moving first baffle 120 to be accommodated within a limited space, which is beneficial for the miniaturization of the sewage tank.

[0118] This application also provides a cleaning device, including a device body and a wastewater tank as described in any of the above embodiments. This cleaning device includes, but is not limited to, a floor scrubber.

[0119] This application also provides a cleaning system, including a base station and the aforementioned cleaning equipment. The base station can be used to clean the floor brush of the cleaning equipment and to charge the cleaning equipment.

[0120] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0121] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A sewage tank, characterized in that, include: The box (110) has a suction pipe (101) and a suction port (102), the suction port (102) being used to connect to a negative pressure source to draw sewage from the suction pipe (101) into the box (110); The box (110) is provided with a solid-liquid separation chamber (111) and a liquid storage chamber (112) that are interconnected. The sewage enters the liquid storage chamber (112) after passing through the solid-liquid separation chamber (111). The housing (110) has a negative pressure channel (113) that connects the outlet (105) of the suction pipe (101) and the suction port, so that the outlet generates negative pressure; The box (110) is also provided with a first baffle (120), which can be movably disposed in the negative pressure channel (113). During the process of the sewage tank rotating from a vertical position to a horizontal position, the airflow through the negative pressure channel (113) at the first baffle (120) gradually decreases.

2. The sewage tank according to claim 1, characterized in that, When the sewage tank is in a lying position, the channel gap of the negative pressure channel (113) formed between the first baffle and the inner side wall of the tank body (110) in the gas flow path of the negative pressure channel (113) is the first gap. When the sewage tank is in a vertical position, the channel gap of the negative pressure channel (113) formed between the first baffle and the inner wall of the tank body (110) in the gas flow path of the negative pressure channel (113) is the second gap. The first gap is smaller than the second gap.

3. The sewage tank according to claim 1 or 2, characterized in that, When the sewage tank is in a lying position, the plane of the first baffle (120) is set at an angle to the extension direction of the sewage suction pipe (101); When the sewage tank is in a vertical position, the plane of the first baffle (120) is parallel to the extension direction of the suction pipe (101); In the extending direction of the suction pipe (101), the first baffle (120) is located on the side of the suction pipe (101) and on the side of the suction pipe (101) near the outlet (105).

4. The sewage tank according to claim 1 or 2, characterized in that, Also includes: The second baffle (130) is disposed in the negative pressure channel (113) and located between the suction port (102) and the first baffle (120). The second baffle (130) has a vent hole (131).

5. The sewage tank according to claim 1 or 2, characterized in that, It also includes a mesh bag structure (140), which is installed inside the box (110). The sewage discharged from the outlet of the sewage suction pipe (101) enters the liquid storage chamber (112) after passing through the mesh bag structure (140).

6. The sewage tank according to claim 4, characterized in that, It also includes a water-blocking baffle (1041), which is disposed in the negative pressure channel (113). The negative pressure airflow passes through the water-blocking baffle (1041), the first baffle (120) and the second baffle (130) in sequence to reach the suction port (102).

7. The sewage tank according to claim 1 or 2, characterized in that, The first baffle (120) has a rotating shaft (123) on each side; The rotating shaft (123) is rotatably arranged relative to the housing (110) so that the first baffle (120) can swing within the negative pressure channel (113).

8. The sewage tank according to claim 7, characterized in that, The first baffle (120) includes a first baffle plate (121) and a second baffle plate (122) connected together; In the vertical direction, the first baffle (121) is located above the rotating shaft (123), and the second baffle (122) is located below the rotating shaft (123). The weight of the first baffle (121) is less than the weight of the second baffle (122) so that the first baffle (120) is always in a vertical state.

9. The sewage tank according to claim 6, characterized in that, When the sewage tank is in a flat position, the water-blocking strip (1041) is parallel to the vertical projection of the sewage suction pipe (101).

10. The sewage tank according to claim 6 or 9, characterized in that, The housing (110) includes an outer shell (103) and an inner frame (104), wherein the inner frame (104) is mounted on the outer shell (103); The water-proof baffle (1041) is located on the inner frame (104), and the inner frame (104) also has a solid-liquid separation plate (1042), which divides the cavity of the outer shell (103) into the liquid storage cavity (112) and the solid-liquid separation cavity (111). The outer shell (103) has a first pipe (1031), and the inner frame (104) has a second pipe (1043). The second pipe (1043) is sleeved outside the first pipe (1031), and the first pipe (1031) and the second pipe (1043) together form the suction pipe (101).

11. A cleaning device, characterized in that, It includes the main body of the equipment and the sewage tank as described in any one of claims 1 to 10 above.

12. A cleaning system, characterized in that, It includes the base station and the cleaning equipment described in claim 11 above.

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