Air filtration device, cleaning apparatus and cleaning system

Abstract

The application provides an air filtering device, a cleaning device and a cleaning system. The air filtering device is used in the cleaning device and comprises a body, a suction member and an air filtering assembly. The body comprises an air duct, which is sequentially provided with an air inlet and an air outlet along its extending direction. The suction member is arranged in the air duct and is configured to form a negative pressure at the air inlet during operation. The air outlet is arranged outside the air filtering assembly, so that the ratio of the flow area of the air inlet to the flow area of the air outlet is between 1:20 and 1:40. In this way, by setting the area of the air outlet to be 20 to 40 times the area of the air inlet, the significantly increased area of the air outlet provides a structural space for setting a large-volume and multi-level air filtering assembly, so that the airflow can fully contact the filtering medium, thereby realizing efficient purification of odors, harmful gases and particulate matters. At the same time, the air outlet flow rate is greatly reduced, effectively reducing the air flow noise from the source.

Description

Technical Field

[0001] This application relates to the field of cleaning equipment technology, specifically to an air filtration device, cleaning equipment, and cleaning system. Background Technology

[0002] With the development of science and technology and the improvement of living standards, household cleaning equipment has become increasingly popular, reducing the burden of housework.

[0003] Currently, floor scrubbers and other cleaning equipment typically suck up dirt, wastewater, and air from the floor into a wastewater tank to clean the floor. However, if users fail to clean the tank promptly, the organic matter inside easily decomposes and acidifies in a humid environment, producing unpleasant odors. These harmful gases are then released back into the room through the air vents, causing secondary pollution and severely impacting indoor air quality and user experience. Utility Model Content

[0004] This application provides an air filtration device in several embodiments, which aims to solve the problem of odor when the wastewater tank of a floor scrubber is not emptied for a long time.

[0005] In a first aspect, this application provides an air filtration device for cleaning equipment. The air filtration device includes: a body, a suction component, and an air filtration assembly. The body includes an air duct, and the air duct has an air inlet and an air outlet sequentially arranged along its extension direction. The suction component is disposed within the air duct and configured to create a negative pressure at the air inlet during operation. The air outlet is disposed outside the air filtration assembly, such that the ratio of the flow area of ​​the air inlet to the flow area of ​​the air outlet is between 1:20 and 1:40.

[0006] In this way, by covering the air filter assembly with the air outlet area, the outlet area is 20 to 40 times larger than the inlet area. This significantly increased outlet area provides structural space for a large-volume, multi-layered air filter assembly, allowing the airflow to fully contact the filter media, thus achieving highly efficient purification of odors, harmful gases, and particulate matter. Simultaneously, the airflow velocity is greatly reduced, effectively lowering airflow noise at the source. While maintaining the suction power of the cleaning equipment, the dual goals of low-noise operation and high-efficiency air purification are achieved simultaneously, enhancing the user experience.

[0007] Optionally, the air inlet is circular, and the diameter of the air inlet is 15mm-20mm.

[0008] Thus, setting the diameter of the air inlet within this range helps to form a concentrated and stable air jet, optimizing the air intake efficiency of the suction component, thereby ensuring strong and efficient initial suction.

[0009] Optionally, the air inlet is located on one axial side of the suction member, and the air outlet is located on one radial side of the suction member; the air duct is configured such that airflow is drawn in from the lower axial side of the suction member and discharged through the outer radial side of the suction member.

[0010] This design aligns with the typical vertical or cylindrical form of cleaning equipment, allowing the suction unit to be placed in the center of the equipment. The surrounding space can then be efficiently used to arrange air ducts and filter components, thus optimizing the overall structure.

[0011] Optionally, the air filtration device further includes a receiving portion integrated with the air duct, the receiving portion being disposed corresponding to the air inlet, the receiving portion being used to fix the wastewater tank of the cleaning equipment and to keep the internal space of the wastewater tank in communication with the air inlet.

[0012] In this way, by directly connecting the exhaust area of ​​the sewage tank to the air inlet, the negative pressure generated by the suction component can immediately draw out the odorous gas generated in the sewage tank, thus preventing the odor from spreading inside the cleaning equipment from the source.

[0013] Optionally, the air filtration assembly includes a first filter layer and a second filter layer stacked along the wind direction, wherein the second filter layer is disposed on the side of the first filter layer away from the suction member.

[0014] In this way, by setting up first and second filter layers stacked along the wind direction, different pollutants can be treated in a graded manner, from coarse to fine, and from physical to chemical. For example, the first filter layer intercepts large particles and adsorbs odors, while the second filter layer filters fine particles, resulting in a more comprehensive and efficient synergistic purification effect.

[0015] Optionally, the air filtration assembly further includes a first bracket and a second bracket, the first bracket being disposed between the first filter layer and the suction member, and the second bracket being disposed on the side of the second filter layer away from the first filter layer; the first bracket and the second bracket are fixedly connected and clamp the first filter layer and the second filter layer therebetween; the first bracket is configured to be detachably connected to the body.

[0016] In this way, the filter layer is held in place by a fixed connection, providing robust mechanical support and reliable sealing edges for the brittle filter material. By designing the first bracket to be detachably connected to the body, the entire air filtration assembly can be quickly assembled and disassembled as a complete module, greatly facilitating the user's cleaning or replacement of the filter element and improving the user experience.

[0017] Optionally, an array of air outlets is formed on the second bracket.

[0018] In this way, the array of air outlets disperses the airflow into numerous tiny streams, making the airflow more uniform and stable, which helps to further reduce wind noise. At the same time, this perforated plate structure significantly enhances the structural strength of the second support while ensuring the ventilation area, preventing its deformation.

[0019] Optionally, the air filtration device further includes a wind-dredging and noise-reducing structure disposed in the air duct. The wind-dredging and noise-reducing structure includes a wind-dredging orifice and a wind-dredging sponge. The wind-dredging orifice is disposed around the outer periphery of the suction member, and the wind-dredging sponge covers the outer side of the wind-dredging orifice.

[0020] In this way, the air vents can disperse the high-speed airflow from the suction component, reducing its energy; while the air-venting sponge can effectively absorb the mid-to-high frequency sound waves generated by airflow friction and eddies. The combination of the two forms a dual noise reduction mechanism of first air venting and then sound absorption. The air venting and noise reduction structure surrounding the suction component can also isolate the transmission of vibration from the suction component (main motor) to the machine body to a certain extent, which helps to improve the overall NVH (noise, vibration, and harshness) performance of the machine.

[0021] Secondly, this application provides a cleaning device, which includes a wastewater tank and an air filtration device as described in any of the above claims, wherein the wastewater tank is detachably mounted on the air filtration device.

[0022] Thirdly, this application provides a cleaning system, which includes a base station and the cleaning equipment described above, wherein the base station is used to supply power to the cleaning equipment and / or to clean the cleaning equipment.

[0023] This application provides an air filtration device, cleaning equipment, and cleaning system. The air filtration device, used in the cleaning equipment, includes a body, a suction component, and an air filter assembly. The body includes an air duct with an air inlet and an air outlet sequentially arranged along its extension direction. The suction component is disposed within the air duct and configured to create negative pressure at the air inlet during operation. The air filter assembly is disposed at the air outlet. The ratio of the flow area of ​​the air inlet to the flow area of ​​the air outlet is between 1:20 and 1:40. By covering the air filter assembly with the air outlet area, the air outlet area is 20 to 40 times larger than the air inlet area. This significantly increased air outlet area provides structural space for a large-volume, multi-layered air filter assembly, allowing the airflow to fully contact the filter medium, thereby achieving efficient purification of odors, harmful gases, and particulate matter. Simultaneously, the airflow velocity is significantly reduced, effectively reducing airflow noise at the source. While maintaining the suction power of the cleaning equipment, the dual goals of low-noise operation and efficient air purification are achieved simultaneously, improving the user experience. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of an air filtration device provided for one embodiment of this specification.

[0025] Figure 2 This is a cross-sectional structural diagram of an air filtration device provided for one embodiment of this specification.

[0026] Figure 3 This is a schematic diagram of the structure of a cleaning device provided for one embodiment of this specification.

[0027] Figure 4 This is yet another structural schematic diagram of a cleaning device provided for one embodiment of this specification.

[0028] Figure 5 This is a schematic diagram of a cleaning system provided for one embodiment of this specification.

[0029] Explanation of reference numerals in the attached figures 100. Air filtration device; 10. Body; 11. Air duct; 111. Air inlet; 112. Air outlet; 20. Suction component; 30. Air filtration assembly; 31. First filter layer; 32. Second filter layer; 33. First bracket; 34. Second bracket; 341. Air outlet; 40. Reception section; 50. Air venting and noise reduction structure; 51. Air vent component; 52. Air venting sponge; 200. Cleaning equipment; 201. Wastewater tank; 300. Cleaning system; 301. Base station. Detailed Implementation

[0030] The technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0031] In this specification, the accompanying drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to show the details of the local features more clearly.

[0032] Unless otherwise stated, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of this specification. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items. The singular forms "a," "the," and "the" as used in this specification and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0033] In the description of this specification, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In the description of this specification, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description in this specification and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. In other words, they should not be construed as limitations on this application.

[0035] In the description of this specification, unless otherwise expressly defined, the terms "installation," "connection," "joining," "fixing," "setting," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this specification according to the specific circumstances.

[0036] Currently, mainstream floor scrubbers and other cleaning equipment use high-speed airflow to mix dirt, wastewater, and air on the floor, forming a "solid-liquid-gas three-phase mixture," which is then sucked into the wastewater tank inside the equipment to clean the floor. However, this cleaning process also brings new problems: when users fail to empty the wastewater tank in time, the residual organic matter (such as food scraps and grease) inside the tank will quickly ferment, decompose, and acidify in the warm, humid, and enclosed environment, becoming a breeding ground for odorous gases.

[0037] During subsequent operation, the suction fan draws in contaminated air from the wastewater tank as part of the airflow, releasing it directly back into the indoor environment through the outlet without effective treatment. This transforms the cleaning equipment from a pollution collector into a new source of pollution, causing serious "secondary pollution" to indoor air. This odor not only severely impacts the user experience and diminishes the sense of cleanliness, but may also pose a potential threat to the health of users' home environment in the long run.

[0038] In related technologies, to solve this problem, wastewater tanks are often redesigned, including implementing solid-liquid separation inside the tank or sealing off pollution sources by installing filter components at the tank opening. However, these methods require redesigning the wastewater tank and reducing its volume.

[0039] Please see Figures 1 to 3 This application provides an air filtration device 100 for use in a cleaning device 200. The air filtration device 100 includes a body 10, a suction component 20, and an air filtration assembly 30. The body 10 includes an air duct 11, with an air inlet 111 and an air outlet 112 sequentially arranged along its extension direction. The suction component 20 is disposed within the air duct 11 and configured to create a negative pressure at the air inlet 111 during operation. The air outlet 112 is disposed outside the air filtration assembly 30, such that the ratio of the flow area of ​​the air inlet 111 to the flow area of ​​the air outlet 112 is between 1:20 and 1:40.

[0040] Thus, by covering the air filter assembly 30 with the air outlet 112, the area of ​​the air outlet 112 is 20 to 40 times larger than that of the air inlet 111. This significantly increased area provides structural space for a large-volume, multi-layered air filter assembly 30, allowing the airflow to fully contact the filter media, thereby achieving efficient purification of odors, harmful gases, and particulate matter. Simultaneously, the airflow velocity is greatly reduced, effectively lowering airflow noise at the source. While maintaining a suction power of 200, the dual goals of low-noise operation and high-efficiency air purification are achieved simultaneously, enhancing the user experience.

[0041] For example, the ratio of the flow area of ​​the air inlet 111 to the flow area of ​​the air outlet 112 can be 1:20, 1:21, 1:22, 1:23, 1:24, 1:25, 1:26, 1:27, 1:28, 1:29, 1:30, 1:31, 1:32, 1:33, 1:34, 1:35, 1:36, 1:37, 1:38, 1:39, or 1:40. In one embodiment, the area of ​​the air inlet 111 is designed to follow the volume of the suction component 20, in which case the area of ​​the air outlet 112 can be 30 times the area of ​​the air inlet 111.

[0042] In this embodiment, by designing the area of ​​the air outlet 112 to be 20 to 40 times the area of ​​the air inlet 111, the air velocity at the air outlet 112 is greatly reduced, thereby effectively reducing the noise generated by airflow at its source. The large area of ​​the air outlet 112 provides ample structural space for setting up a large-volume, high-efficiency "air filter assembly 30," ensuring that the airflow has sufficient residence time to contact the filter medium, laying the foundation for achieving deep air purification. This area ratio achieves the optimal balance between low noise and high-efficiency purification while ensuring that the suction component 20 generates sufficient inlet negative pressure (i.e., suction force), solving the contradiction between suction force and emission quality that is difficult to balance in traditional designs.

[0043] Specifically, by significantly increasing the area of ​​the air outlet 112, the airflow velocity is reduced by an order of magnitude, thereby significantly reducing airflow noise from its physical source. The large area of ​​the air outlet 112 provides unprecedented physical space for installing a large-volume, multi-layered air filter assembly 30. This allows the airflow to pass through the filter media at a lower velocity and more evenly, ensuring sufficient contact time between the airflow and activated carbon, HEPA filters, etc., thus achieving efficient interception and adsorption of odor molecules, harmful gases (such as formaldehyde), and fine particulate matter, resulting in high purification efficiency. This area ratio range is the optimal balance point verified by extensive simulation and experimentation. If the ratio is too small (such as approaching traditional designs), the noise reduction and purification effects will be poor; if the ratio is too large, the back pressure may be too small, affecting the load and efficiency of the suction component 20, which is detrimental to the stable output of suction power. The 1:20 to 1:40 range of this application perfectly balances ensuring sufficient suction power with achieving ultra-quiet and deep purification.

[0044] In this embodiment, the suction component 20 can be a motor, which is often cylindrical. Therefore, the user support and protection motor of the body 10 can also be cylindrical. In this case, the air outlet 112 is semi-cylindrical, and the air outlet 112 can be set on the front side of the cleaning device 200 to ensure that the air outlet 112 is not directed at the user.

[0045] Specifically, when the user operates the device upright, their main body parts are located behind the cleaning device 200. Positioning the air outlet 112 at the front ensures that the purified airflow is directed entirely towards the clean area in front of the user, effectively preventing the airflow from blowing directly onto the user's legs or body, eliminating any potentially uncomfortable draft. This also minimizes the direct impact of airflow noise on the user, further optimizing the subjective feeling of quietness. Simultaneously, it avoids the risk of blowing fine dust particles from the ground towards the user.

[0046] In summary, by innovatively arranging a large-area semi-cylindrical air outlet 112 on the front side of the device, this embodiment of the application not only meets the requirements of ultra-large area ratio and low wind noise, but also achieves multiple effects in terms of user experience, such as avoiding direct airflow, promoting circulation and improving safety.

[0047] Please see Figures 1 to 3 In some embodiments, the air inlet 111 is circular, and the diameter of the air inlet 111 is 15mm-20mm. For example, the diameter of the air inlet 111 can be 15mm, 16mm, 17mm, 18mm, 19mm, or 20mm.

[0048] Thus, setting the diameter of the air inlet 111 within this range helps to form a concentrated and stable air jet, optimizes the air intake efficiency of the suction component 20, and thus ensures strong and efficient initial suction.

[0049] In this embodiment, the circular inlet shape minimizes flow resistance and avoids unnecessary turbulence at the air inlet 111. Limiting the diameter to between 15mm and 20mm helps form a concentrated, stable, and high-momentum air jet at the inlet of the suction component 20. This efficient air intake mode significantly reduces the air intake loss of the suction component 20 itself, thereby ensuring that the device obtains strong and stable initial suction, which is the foundation for achieving efficient cleaning. The diameter range is optimally matched with the power and flow characteristics of commonly used suction components 20. This ensures that while generating sufficient negative pressure, the air intake velocity is maintained within a reasonable range, avoiding suction blockage caused by an excessively small inlet diameter and preventing insufficient negative pressure and energy waste caused by an excessively large inlet diameter.

[0050] Specifically, the air inlet 111 and the suction component 20 are designed in a circular shape. The diameter of the air inlet 111 can be 18 mm, in which case the area is 254.34 mm² (or more precisely, 81π mm²). In one embodiment, the ratio of the flow area of ​​the air inlet 111 to the flow area of ​​the air outlet 112 is 1:20. Therefore, the flow area of ​​the air outlet 112 is 5086.8 mm² (or more precisely, 1620π mm²).

[0051] Please see Figures 1 to 3 In some embodiments, the air inlet 111 is located on the axial side of the suction member 20, and the air outlet 112 is located on the radial side of the suction member 20; the air duct 11 is configured such that airflow is drawn in from the axial lower side of the suction member 20 and discharged through the radial outer peripheral side of the suction member 20.

[0052] This design aligns with the typical vertical or cylindrical form of the cleaning equipment 200, allowing the suction component 20 to be placed at the center of the cleaning equipment 200. The surrounding space can be efficiently used to arrange the air duct 11 and filter components, thus optimizing the overall structure.

[0053] In this embodiment, the positions of the air inlet 111 and air outlet 112 conform to the vertical or cylindrical shape typically used in cleaning equipment 200 such as floor scrubbers. It uses a cylindrical suction unit 20 as its core, placed at the center of the cleaning equipment 200, while the complex air duct 11 and large-area air filter assembly 30 are arranged around its outer perimeter. This greatly optimizes the utilization of internal space, making the overall structure more compact and avoiding the space waste caused by the winding and convoluted flow channels in traditional designs.

[0054] In this embodiment, under the combined action of centrifugal force and wind pressure, the airflow naturally diffuses radially, resulting in a smooth flow and significantly reducing airflow vortices and energy losses caused by abrupt changes in flow direction or abrupt changes in channel cross-sectional area. This not only improves airflow efficiency but also helps to further reduce system operating noise. The ample peripheral space allows for the installation of composite filter elements with guaranteed thickness and area, ensuring that low-speed airflow can fully contact the filter media.

[0055] In addition, the design with the suction component 20 as the structural center and the surrounding components fixed around it helps to lower the center of gravity of the whole machine, improve the structural rigidity and stability of the cleaning equipment 200 during mobile use, avoid the problem of being top-heavy, and improve the handling and user experience.

[0056] Please see Figures 1 to 3 In some embodiments, the air filtration device 100 further includes a receiving portion 40 integrated with the air duct 11. The receiving portion 40 is disposed corresponding to the air inlet 111. The receiving portion 40 is used to fix the wastewater tank 201 of the cleaning device 200 and to keep the internal space of the wastewater tank 201 in communication with the air inlet 111.

[0057] In this way, by directly connecting the exhaust area of ​​the sewage tank 201 to the air inlet 111, the negative pressure generated by the suction component 20 can immediately draw out the odorous gas generated in the sewage tank 201, thus preventing the odor from spreading inside the cleaning equipment 200 from the source.

[0058] In this embodiment, the exhaust area of ​​the wastewater tank 201 is directly integrated into the inlet of the main air duct 11 of the cleaning device 200 through the structural connection of the housing 40. This allows the negative pressure generated by the suction component 20 during operation of the cleaning device 200 to act actively and immediately on the inside of the wastewater tank 201, drawing in the newly generated odorous gas into the purification air duct 11. When the user stops using the cleaning device 200, i.e., when the device is in standby mode, the odor molecules generated inside the wastewater tank 201 will naturally diffuse due to the concentration difference. At this time, the housing 40 has constructed a single physical channel from the inside of the wastewater tank 201 to the external environment through the air filter component 30, which can only be exhausted into the environment through the air inlet 111, the air duct 11, and the air outlet 112. In this way, the wastewater tank 201 can be filtered and cleaned regardless of whether the cleaning device 200 is working.

[0059] Specifically, the wastewater tank 201 is typically equipped with a quick-installation structure such as a sliding rail, snap-fit, or magnetic attachment, allowing it to be easily placed and installed by the user as a functional module. Upon installation, the air circuit connection is automatically completed, requiring no additional user intervention, greatly improving the convenience of daily maintenance (such as emptying wastewater and cleaning the tank) and enhancing the user experience.

[0060] Please see Figures 1 to 3 In some embodiments, the air filter assembly 30 includes a first filter layer 31 and a second filter layer 32 stacked along the airflow direction, with the second filter layer 32 disposed on the side of the first filter layer 31 away from the suction member 20.

[0061] Thus, by setting up a first filter layer 31 and a second filter layer 32 stacked along the wind direction, different pollutants can be treated in a graded manner from coarse to fine and from physical to chemical. For example, the first filter layer 31 intercepts large particles and adsorbs odors, while the second filter layer 32 filters fine particles, resulting in a more comprehensive and efficient synergistic purification effect.

[0062] In this embodiment, the first filter layer 31 can be an activated carbon granular layer, and the second filter layer 32 can be an H12 high-efficiency filter layer (H12-grade HEPA filter). The first filter layer 31, as a primary filter, is mainly responsible for intercepting larger solid particles in the airflow and using its material properties (such as activated carbon) to adsorb gaseous pollutants and odor molecules. The second filter layer 32, as a fine filter, focuses on capturing the fine particulate matter (such as PM2.5, allergens, etc.) remaining after primary filtration. This avoids overburdening a single filter layer, allowing each filter material to perform at its maximum efficiency in its area of ​​expertise, thereby achieving a more comprehensive and efficient purification effect.

[0063] Of course, in other embodiments, only an activated carbon granule layer or only an H12 high-efficiency filter layer may be provided.

[0064] Please see Figures 1 to 3 In some embodiments, the air filter assembly 30 further includes a first bracket 33 and a second bracket 34, the first bracket 33 being disposed between the first filter layer 31 and the suction member 20, and the second bracket 34 being disposed on the side of the second filter layer 32 away from the first filter layer 31; the first bracket 33 and the second bracket 34 are fixedly connected and clamp the first filter layer 31 and the second filter layer 32 therebetween; the first bracket 33 is configured to be detachably connected to the body 10.

[0065] In this way, the filter layer is held in place by a fixed connection, providing robust mechanical support and reliable sealing edges for the brittle filter material. By designing the first bracket 33 to be detachably connected to the body 10, the entire air filter assembly 30 can be quickly assembled and disassembled as a complete module, greatly facilitating the user's cleaning or replacement of the filter element and improving the user experience.

[0066] In this embodiment, the filter materials such as activated carbon filter and HEPA filter are relatively fragile and easily damaged or deformed under airflow impact and equipment movement vibration. The rigid clamping of the first bracket 33 and the second bracket 34 provides a sturdy "skeleton" for the entire filter assembly, effectively preventing the filter material from collapsing, bending or tearing, and ensuring its structural integrity and filtration performance stability throughout its life cycle.

[0067] By designing the first bracket 33 to be detachably connected to the body 10, the entire air filtration assembly 30, integrating the bracket and filter layer, can operate as a standalone, complete functional module. Users or maintenance personnel do not need to touch or handle the fragile filter media separately; they only need to install or remove the entire module. This greatly simplifies the filter replacement process, avoids filter media damage caused by improper operation, and also facilitates cleaning of the bracket itself, significantly improving product maintainability and user experience.

[0068] In addition, when the two supports clamp the filter layer, sealing strips or compressed sponges are usually placed at the edges of the filter layer. When they are fastened together, they apply uniform pressure to the sealing material, forming a reliable sealing area at the edges of the filter layer.

[0069] Please see Figures 1 to 3 In some embodiments, an array of air outlet holes 341 are formed on the second bracket 34.

[0070] In this way, the array of air outlets 341 can disperse the airflow into numerous tiny streams, making the airflow more uniform and stable, which helps to further reduce wind noise. At the same time, this perforated plate structure significantly enhances the structural strength of the first support 33 while ensuring the ventilation area, preventing its deformation.

[0071] In this embodiment, the air outlets 341 can be arranged in a hexagonal array. When the high-speed, concentrated airflow from the suction component 20 impacts the second support 34, it is dispersed and divided into countless small and parallel streams by these dense holes. This process effectively breaks up large-scale airflow vortices, balances air pressure, and makes the airflow to the subsequent filter layer more uniform and stable. This not only improves the utilization rate of subsequent filter materials and avoids excessively high local wind speeds, but more importantly, it significantly reduces mid-to-high frequency noise caused by airflow disturbances and vortex shedding, achieving further noise reduction.

[0072] In some embodiments, a mesh can be provided between the second support 34 and the second filter layer 32 to protect the second filter layer 32 and prevent dust and impurities in the environment from entering the second filter layer 32.

[0073] Please see Figures 1 to 3 In some embodiments, the air filtration device 100 further includes a wind-dredging and noise-reducing structure 50 disposed in the air duct 11. The wind-dredging and noise-reducing structure 50 includes a wind-dredging orifice 51 and a wind-dredging sponge 52. The wind-dredging orifice 51 is disposed around the outer periphery of the suction member 20, and the wind-dredging sponge 52 covers the outer side of the wind-dredging orifice 51.

[0074] Thus, the air vent 51 can disperse the high-speed airflow from the suction component 20, reducing its energy; while the air vent sponge 52 can effectively absorb the mid-to-high frequency sound waves generated by airflow friction and eddies. The combination of the two forms a dual noise reduction mechanism of first air venting and then sound absorption. The air vent noise reduction structure 50 surrounding the suction component 20 can also isolate the transmission of vibration of the suction component 20 (main motor) to the body 10 to a certain extent, which helps to improve the overall NVH (noise, vibration, and harshness) performance of the machine.

[0075] In this embodiment, the airflow perforation component 51 is essentially a ring-shaped flow equalization noise reducer. Through its regularly distributed perforations, it segments and reorganizes the unstable, high-speed pulsed airflow from the impeller of the suction component 20, breaking up large airflow vortices and transforming them into more fine, stable, low-speed streams. This process directly reduces the sound source energy of mid-to-low frequency wind noise by reducing severe airflow disturbances. The airflow, after initial processing by the airflow perforation component 51, interacts with the airflow-absorbing sponge 52 as it continues to diffuse outward. As a porous sound-absorbing material, the airflow-absorbing sponge 52's interwoven fiber structure generates intense friction with air molecules, converting sound energy (especially sharp mid-to-high frequency noise) into heat energy and dissipating it, thereby efficiently absorbing the remaining broadband aerodynamic noise.

[0076] Please see Figure 3 and Figure 4This application provides a cleaning device 200, which includes a wastewater tank 201 and an air filter device 100 as described above, wherein the wastewater tank 201 is detachably mounted on the air filter device 100.

[0077] In this embodiment, the type of cleaning equipment 200 is not limited to meet various needs. The cleaning equipment 200 can be an environmental cleaning device 200 such as a floor scrubber or mop. The cleaning equipment 200 includes the air filtration device 100 of any of the above embodiments. Therefore, it can possess all the technical features and effects of the air filtration device 100, resulting in better odor prevention and noise reduction effects, as well as better operational stability and service life, thus improving the user experience.

[0078] In this embodiment, the specific connection method for the detachable connection is not limited to meet various needs. For example, the detachable connection method can be a mechanical snap-fit ​​connection or a threaded locking connection. Thus, by detachably connecting the modular wastewater tank 201 and the air filter device 100, the functional boundaries and application scenarios of the single cleaning device 200 are greatly expanded. At the same time, this platform design improves the user's flexibility in switching between different cleaning tasks and the convenience of daily maintenance, enhancing the overall competitiveness and user value of the product.

[0079] Please see Figure 5 This application provides a cleaning system 300, which includes a base station 301 and the aforementioned cleaning device 200. The base station 301 is used to supply power to the cleaning device 200 and / or to clean the cleaning device 200.

[0080] In this embodiment, the type of cleaning system 300 is not limited to meet various needs. The cleaning system 300 includes a base station 301 and the aforementioned cleaning device 200. The base station 301 is used to supply power to the cleaning device 200 and / or to clean the cleaning device 200. The cleaning system 300 can possess all the technical features and effects of the aforementioned cleaning device 200, resulting in better cleaning and self-cleaning effects, better operational stability and service life, and improved user experience.

[0081] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0082] The functions and effects of this embodiment can be explained by referring to the foregoing implementation methods, and will not be repeated here.

[0083] It is understood that in the various embodiments of this specification, the sequence number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this specification.

[0084] It is understood that the various implementation methods described in this specification can be implemented individually or in combination, and the embodiments in this specification are not limited in this respect.

[0085] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the aforementioned method implementations, and will not be repeated here.

[0086] The above are merely specific embodiments of this specification, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this specification should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An air filtration device, characterized in that, For use in cleaning equipment, including: The fuselage includes an air duct, wherein an air inlet and an air outlet are sequentially provided along its extension direction; A suction element, disposed within the air duct and configured to create negative pressure at the air inlet during operation; and An air filter assembly, wherein the air outlet is disposed on the outside of the air filter assembly, such that the ratio of the flow area of ​​the air inlet to the flow area of ​​the air outlet is between 1:20 and 1:

40.

2. The air filtration device according to claim 1, characterized in that, The air inlet is circular, and the diameter of the air inlet is 15mm-20mm.

3. The air filtration device according to claim 1, characterized in that, The air inlet is located on one axial side of the suction member, and the air outlet is located on one radial side of the suction member; the air duct is configured such that airflow is drawn in from the lower axial side of the suction member and discharged through the outer radial side of the suction member.

4. The air filtration device according to claim 3, characterized in that, The air filtration device also includes a receiving portion integrated with the air duct, the receiving portion being disposed corresponding to the air inlet, the receiving portion being used to fix the wastewater tank of the cleaning equipment and to keep the internal space of the wastewater tank in communication with the air inlet.

5. The air filtration device according to claim 1, characterized in that, The air filtration assembly includes a first filter layer and a second filter layer stacked along the wind direction, with the second filter layer disposed on the side of the first filter layer away from the suction member.

6. The air filtration device according to claim 5, characterized in that, The air filtration assembly further includes a first bracket and a second bracket, the first bracket being disposed between the first filter layer and the suction member, and the second bracket being disposed on the side of the second filter layer away from the first filter layer; the first bracket and the second bracket are fixedly connected and clamp the first filter layer and the second filter layer therebetween; the first bracket is configured to be detachably connected to the body.

7. The air filtration device according to claim 6, characterized in that, The second bracket has an array of air outlet holes.

8. The air filtration device according to claim 1, characterized in that, The air filtration device also includes a wind-dredging and noise-reducing structure disposed in the air duct. The wind-dredging and noise-reducing structure includes a wind-dredging orifice and a wind-dredging sponge. The wind-dredging orifice is disposed around the outer periphery of the suction member, and the wind-dredging sponge covers the outer side of the wind-dredging orifice.

9. A cleaning device, characterized in that, include: The wastewater tank and the air filtration device according to any one of claims 1-8, wherein the wastewater tank is detachably mounted on the air filtration device.

10. A cleaning system, characterized in that, The device includes a base station and the cleaning equipment as described in claim 9, wherein the base station is used to supply power to the cleaning equipment and / or to clean the cleaning equipment.

Images