Sewage tank and cleaning device

Abstract

The application discloses a sewage tank and a cleaning device. The sewage tank comprises a tank body and a plurality of first bending and twisting blades. The tank body comprises a first tank body wall, a second tank body wall and a third tank body wall. The first tank body wall and the second tank body wall are oppositely arranged along a first direction. The third tank body wall is connected to the first tank body wall and the second tank body wall. The first tank body wall, the second tank body wall and the third tank body wall enclose a containing cavity. The first tank body wall is provided with an air inlet. The second tank body wall is provided with an air outlet. The air inlet and the air outlet are both communicated with the containing cavity. The air outlet is provided with a filter element. The plurality of first bending and twisting blades are located in the containing cavity. The first bending and twisting blades are connected to the first tank body wall. The extension direction of the first bending and twisting blades is from the air inlet to the third tank body wall. The plurality of first bending and twisting blades are arranged at intervals along the circumferential direction of the air inlet. The sewage tank can realize the separation of gas and liquid through the first bending and twisting blades. The first bending and twisting blades are integrated with the sewage tank, which is beneficial to reducing the overall volume of the cleaning device.

Description

Technical Field

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

[0002] Intelligent cleaning equipment is being used more and more widely in daily life and industry, with more and more users using it to replace manual labor in cleaning various indoor and outdoor surfaces.

[0003] Wastewater generated during surface cleaning by cleaning equipment is drawn into a wastewater tank via a gas extraction device. To reduce the risk of liquid entering and damaging the gas extraction device, cleaning equipment typically includes a gas-liquid separator. However, these separators usually occupy a significant amount of space, contributing to the overall size of the cleaning equipment. Therefore, miniaturization and integration of cleaning equipment while ensuring effective gas-liquid separation is a key research topic in the industry. Utility Model Content

[0004] To solve the above-mentioned technical problems, this application provides a sewage tank and cleaning equipment.

[0005] This application is achieved through the following technical solution.

[0006] The first aspect of this application provides a wastewater tank for use in cleaning equipment. The wastewater tank includes: a tank body comprising a first tank wall, a second tank wall, and a third tank wall. The first and second tank walls are disposed opposite each other along a first direction, and the third tank wall connects the first and second tank walls. The first, second, and third tank walls enclose a receiving cavity. The first tank wall has an air inlet, and the second tank wall has an air outlet. Both the air inlet and the air outlet communicate with the receiving cavity. A filter element is disposed at the air outlet. A plurality of first twisted blades are located within the receiving cavity. The first twisted blades are connected to the first tank wall, and the extending direction of the first twisted blades is from the air inlet towards the third tank wall. The plurality of first twisted blades are spaced apart along the circumferential direction of the air inlet.

[0007] In some embodiments, the first bent blade is bent from the air inlet toward the third housing wall and inclines toward the second housing wall along the direction of the first housing wall.

[0008] In some embodiments, along the extension direction of the first twisted blade, the angle between the first twisted blade and the first housing wall gradually decreases from the root to the tail; wherein, along the extension direction of the first twisted blade, the root of the first twisted blade is close to the air inlet, and the tail of the first twisted blade is connected to the third housing wall.

[0009] In some embodiments, the third housing wall is arc-shaped, and the tail profile of the first twisted blade is tangent to the inner wall surface of the third housing wall.

[0010] In some embodiments, the first bent-twisted blade is integrally formed with the first housing wall; or, the first bent-twisted blade is rotatably connected to the first housing wall.

[0011] In some embodiments, the wastewater tank further includes a plurality of second twisted blades located within the receiving cavity. The second twisted blades are connected to the second tank wall and extend in the direction from the air outlet to the third tank wall. The plurality of second twisted blades are arranged at intervals along the circumferential direction of the air outlet, and along the first direction, the second twisted blades are arranged at intervals from the first twisted blades.

[0012] In some embodiments, the second bent blade is bent from the air outlet toward the third housing wall and inclines toward the first housing wall along the second housing wall.

[0013] In some embodiments, along the extending direction of the second twisted blade, the angle between the second twisted blade and the second housing wall gradually decreases from the root to the tail; wherein, along the extending direction of the second twisted blade, the root of the second twisted blade is close to the air outlet, and the tail of the second twisted blade is connected to the third housing wall.

[0014] In some embodiments, the angle between the end of the second bent blade near the third housing wall and the first direction is less than a preset threshold.

[0015] In some embodiments, the second twisted blades are staggered with the first twisted blades in the circumferential direction.

[0016] In some embodiments, the second twisted blade is integrally formed with the second housing wall; or, the second twisted blade is rotatably connected to the second housing wall.

[0017] In some embodiments, the wastewater tank further includes a baffle connected to the side of the first twisted blade facing away from the air inlet; along the same projection plane perpendicular to the first direction, the projection of the air inlet falls within the projection range of the baffle.

[0018] In some embodiments, the portion of the baffle opposite to the air inlet has a first protrusion that protrudes toward the air inlet.

[0019] In some embodiments, along the same projection plane perpendicular to the first direction, the projection of the first protrusion at least partially falls within the projection range of the air inlet.

[0020] In some embodiments, the outer edge of the baffle is provided with a first extension extending toward the air inlet.

[0021] In some embodiments, the outer edge of the baffle is provided with a second extension extending toward the air outlet.

[0022] In some embodiments, a portion of the first housing wall facing the second housing wall is provided with a second protrusion protruding into the second housing wall, and an air inlet is located on the second protrusion.

[0023] In some embodiments, a portion of the second housing wall facing the first housing wall is provided with a third protrusion protruding into the first housing wall, and an air outlet is located on the third protrusion.

[0024] In some embodiments, the third housing wall has a water outlet that communicates with the receiving cavity.

[0025] In some embodiments, there are multiple water outlets, which are spaced apart along the circumferential direction of the third housing wall.

[0026] In some embodiments, a groove is provided on the side of the third housing wall facing the interior of the receiving cavity, the groove being located between the first and second bent-twist blades, and the water outlet being located on the groove.

[0027] The second aspect of this application provides a cleaning device, which includes: a device body; and a wastewater tank according to the first aspect of this application, the wastewater tank being disposed on the device body.

[0028] In some embodiments, the cleaning equipment further includes a gas suction device, with the air inlet connected to the gas suction device.

[0029] In some embodiments, the third housing wall has a water outlet that communicates with the receiving cavity, and the cleaning device further includes a liquid suction device that communicates with the water outlet.

[0030] Utility Model Effect The wastewater tank of this application is equipped with multiple first-bend blades. These blades separate the liquid and gas entering the wastewater tank, reducing the possibility of liquid entering the gas extraction device and causing short circuits, burnout, or damage. This improves the service life and reliability of the cleaning equipment. Furthermore, the first-bend blades are located within the receiving cavity of the wastewater tank, integrated seamlessly with it, resulting in a higher degree of integration. Therefore, there is no need for an additional gas-liquid separation device between the gas extraction device and the wastewater tank, which helps reduce the overall size of the cleaning equipment, improves space utilization, and enhances its integration and miniaturization. Attached Figure Description

[0031] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A three-dimensional structural schematic diagram of a sewage tank provided for some embodiments of this application; Figure 2 A schematic diagram of the planar structure of a sewage tank provided for some embodiments of this application; Figure 3 Schematic cross-sectional view of a sewage tank provided for some embodiments of this application; Figure 4 A partial plan view of a sewage tank provided for some embodiments of this application, wherein a first tank wall and a first bent blade are shown; Figure 5 A partial perspective structural diagram of a sewage tank provided for some embodiments of this application, wherein a first tank wall and a first bent blade are shown; Figure 6 A partial plan view of a wastewater tank provided for some embodiments of this application, wherein a second tank wall and a second bent blade are shown; Figure 7 A partial three-dimensional structural diagram of a sewage tank provided for some embodiments of this application shows a second tank wall and a second tortuous blade.

[0032] Explanation of reference numerals in the attached figures 1. Box body; 10. Receiving cavity; 11. First box body wall; 11a. Air inlet; 111. Second protrusion; 12. Second box body wall; 12a. Air outlet; 121. Third protrusion; 13. Third box body wall; 13a. Water outlet; 13b. Groove; 2. First bent blade; 2a. Root of the first bent blade; 2b. Tail of the first bent blade; 3. Second bent blade; 3a. Root of the second bent blade; 3b. Tail of the second bent blade; 4. Baffle; 41. First protrusion; 42. First extension; 43. Second extension; 100. Wastewater tank. Detailed Implementation

[0033] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having” and any variations thereof are intended to cover non-exclusive inclusion.

[0035] In the description of the embodiments of this application, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0036] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0037] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0038] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0039] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can 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 the embodiments of this application according to the specific circumstances.

[0040] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0041] Below, refer to Figures 1 to 7 Some embodiments of this application will be described in detail.

[0042] like Figure 1 and Figure 2 As shown, this application provides a wastewater tank 100. The wastewater tank 100 is used in cleaning equipment.

[0043] Cleaning equipment refers to equipment used to clean surfaces that require cleaning. Cleaning equipment includes, but is not limited to, window cleaning machines, vacuum cleaners, floor scrubbers, mops, and combined sweeper and mop machines. Surfaces to be cleaned include, but are not limited to, windows, architectural glass, floors, tiles, carpets, tabletops, or the surfaces of other objects and components. This application does not specifically limit the types of cleaning equipment or surfaces to be cleaned.

[0044] In some embodiments of this application, the cleaning equipment includes a main body and a wastewater tank 100.

[0045] The main body of the equipment is the primary supporting and load-bearing component of the cleaning equipment. The cleaning components, movement system, sensing system, control system, drive system, energy system, and human-machine interface system of the cleaning equipment are all located within the main body of the equipment.

[0046] Wastewater tank 100 is part of the cleaning components and is one of the structural components in the cleaning equipment used to collect and store dirt and wastewater generated during the cleaning process. Wastewater tank 100 is installed on the main body of the equipment.

[0047] For example, the main body of the device may include a suction port. The suction port is connected to a wastewater tank 100. During the cleaning process of the cleaning device (scraper, etc.) on the surface to be cleaned, dirt on the surface and wastewater generated by the cleaning device can be sucked into the wastewater tank 100 through the suction port.

[0048] For ease of description, the following description uses a window cleaning machine as an example. The main body of the equipment can be the window cleaning machine itself. The window cleaning machine itself can adhere to the window surface and move across the window surface to clean it. A wastewater tank 100 can be installed inside the window cleaning machine itself. Wastewater generated during the window cleaning process can be sucked into the wastewater tank 100.

[0049] like Figure 3 andFigure 4 As shown, the sewage tank 100 includes a tank body 1. The tank body 1 is the outer shell of the sewage tank 100, and has an internal cavity 10 for containing sewage and for containing some functional components.

[0050] In this embodiment, the housing 1 is generally flat and wheel-shaped. This shape results in a smaller dimension along its thickness. Therefore, when the housing 1 is installed within the window cleaning machine's body, it does not occupy excessive space in the thickness direction of the machine body, allowing for a thinner and lighter machine body with a smaller overall size, thus enabling better adhesion to the window. Of course, those skilled in the art will understand that in other embodiments, the housing 1 can also be cylindrical, cuboid, or any other suitable shape, depending on the specific shape and space available for the cleaning machine's main body.

[0051] Specifically, the housing 1 includes a first housing wall 11, a second housing wall 12, and a third housing wall 13. The first housing wall 11 and the second housing wall 12 are disposed opposite each other along a first direction. The third housing wall 13 connects the first housing wall 11 and the second housing wall 12. The first housing wall 11, the second housing wall 12, and the third housing wall 13 together enclose a receiving cavity 10. In this embodiment, the first direction can be the thickness direction of the housing 1, such as... Figure 2 and Figure 3 The direction of X. In some embodiments, the thickness direction of the cleaning device may also be referred to as the first direction.

[0052] In some embodiments, the first housing wall 11, the second housing wall 12, and the third housing wall 13 may be formed as an integral structural component. Exemplarily, the first housing wall 11, the second housing wall 12, and the third housing wall 13 may be integrally injection molded.

[0053] In some embodiments, the first housing wall 11, the second housing wall 12, and the third housing wall 13 can be separate structures that are then assembled together. Exemplarily, the first housing wall 11, the second housing wall 12, and the third housing wall 13 can be assembled together by means of adhesive, snap-fit, plug-in, or other methods.

[0054] In this embodiment, the first tank wall 11 and the second tank wall 12 are generally flat. The third tank wall 13 is generally arc-shaped. When the sewage tank 100 is installed on the equipment body, the relatively flat first tank wall 11 and the second tank wall 12 can fit more closely to the equipment body, thereby reducing the waste of space within the equipment body and improving the space utilization rate of the equipment body. Moreover, it can also better position and fix it to the equipment body. The third tank wall 13 connects the first tank wall 11 and the second tank wall 12, thus forming the circumferential wall of the tank 1. The arc-shaped circumferential wall can increase the volume of the tank 1, thereby meeting the capacity requirements of the sewage tank 100 while miniaturizing the tank 1 as much as possible.

[0055] Moreover, when the mixed airflow containing water and air enters the sewage tank 100, the arc-shaped wall can smoothly guide the airflow to rotate along the arc-shaped tank wall, thereby throwing the denser water droplets and solid waste towards the arc-shaped third tank wall 13 under the action of centrifugal force, thus achieving the separation of gas and liquid.

[0056] In addition, the curved third chamber wall 13 is less likely to form a right-angle dead zone, which allows the gas to flow more smoothly, thereby reducing turbulence and eddies inside the sewage tank 100, thus reducing the suction loss of the gas extraction device and maintaining the working efficiency of the cleaning equipment.

[0057] Of course, those skilled in the art should understand that in some other embodiments, the first housing wall 11 and the second housing wall 12 may be in any other suitable shape, such as hemispherical or arc-shaped.

[0058] like Figures 1 to 3 As shown, the first housing wall 11 has an air inlet 11a. The second housing wall 12 has an air outlet 12a. Both the air inlet 11a and the air outlet 12a are connected to the receiving cavity 10. The air inlet 11a is generally located in the central region of the first housing wall 11. The air outlet 12a is generally located in the central region of the second housing wall 12. Along the first direction, the air inlet 11a and the air outlet 12a are arranged symmetrically on opposite sides of the housing 1. This makes the flow of the mixed airflow containing sewage within the housing 1 more stable and symmetrical, reducing the possibility of unpredictable turbulence occurring in the sewage within the housing 1, and reducing the possibility of sewage being stirred up and carried out of the housing 1 along with the airflow through the air outlet 12a.

[0059] In some embodiments of this application, the cleaning equipment further includes a gas suction device. The gas suction device may be installed on the equipment body. The air inlet 11a of the wastewater tank 100 is connected to the gas suction device.

[0060] The gas suction device (also known as an air pump) is the core power source for generating suction in cleaning equipment. It typically consists of a motor and a fan (impeller). For example, the motor drives the fan to rotate at high speed, thereby continuously and rapidly expelling the air in the containment chamber 10 to the outside, thus creating a low-pressure zone inside the wastewater tank 100 (from the air inlet 11a to the air outlet 12a). There is a certain pressure difference between this low-pressure zone and normal atmospheric pressure, thereby creating "suction".

[0061] During the cleaning process, dirt and wastewater encountered by the cleaning equipment can be drawn into the receiving cavity 10 of the wastewater tank 100 through the air inlet 11a by the gas suction device. Heavier wastewater or some solid waste can remain in the receiving cavity 10 of the wastewater tank 100 under the action of gravity, while lighter gas will continue to flow towards the gas suction device through the air outlet 12a and be discharged to the outside of the equipment body by the gas suction device.

[0062] In some embodiments, a filter element may be provided at the air outlet 12a. The filter element can intercept larger solid particles or some fine dust in the air, reducing the possibility that these contaminants will flow through the air outlet 12a to the gas suction device and cause damage to the gas suction device.

[0063] For example, the filter element includes, but is not limited to, a filter screen, a sponge, or a HEPA filter.

[0064] During the gas suction process, some liquids and water droplets may flow along with the gas towards the outlet 12a. If these liquids enter the gas suction device, they may cause a short circuit, potentially burning out the motor. Impurities carried in the liquid may also adhere to the inside of the motor, leading to rust and corrosion, severely impacting its lifespan. Furthermore, if the high-speed rotating impeller impacts liquid water, it may generate significant resistance, increasing the motor load and potentially causing further damage.

[0065] Therefore, in related technologies, a gas-liquid separation device is usually installed between the gas suction device and the wastewater tank. However, the gas-liquid separation device is usually large in structure and occupies a lot of space, which increases the size of the equipment itself and is not conducive to the miniaturization and integration of cleaning equipment.

[0066] In the embodiments of this application, such as Figures 3 to 5 As shown, the sewage tank 100 also includes a plurality of first bent blades 2.

[0067] A twisted blade is a special type of blade structure, with different leaf shapes from the leaf base to the leaf tip. Specifically, a twisted blade twists along its height, and the generatrix of the twisted blade is curved.

[0068] There are multiple first-bent-twist blades 2, which are located within the receiving cavity 10. The first-bent-twist blades 2 are connected to the first housing wall 11. The first-bent-twist blades 2 extend from the air inlet 11a towards the third housing wall 13. The multiple first-bent-twist blades 2 are arranged at intervals along the circumferential direction of the air inlet 11a.

[0069] The embodiments of this application do not specifically limit the number of the first bending blades 2, but can be specifically set according to the actual size of the housing 1.

[0070] Because the wastewater tank 100 is equipped with multiple first-bend blades 2, when the mixed airflow containing liquid enters the receiving cavity 10 through the air inlet 11a, it will come into contact with the multiple first-bend blades 2. When the mixed airflow passes through the channel between the multiple first-bend blades 2, it will be guided by the curved surface of the first-bend blades 2, thereby changing the direction of movement of the mixed airflow. For example, it can convert the linear kinetic energy of the mixed airflow into rotational kinetic energy. Under the guidance of the first-bend blades 2, the mixed airflow will enter the receiving cavity 10 at a certain speed and form a high-speed rotating airflow vortex. Under the action of centrifugal force, the denser liquid droplets will be thrown towards the peripheral wall of the receiving cavity 10, that is, the third tank wall 13. After the liquid hits the third tank wall 13, it loses kinetic energy and collects on the inner wall of the third tank wall 13 to form a liquid film, or it can slide down under the action of gravity and collect at the bottom of the receiving cavity 10. The less dense air will accumulate in the low-pressure area of ​​the rotation center and continue to move towards the gas suction device through the air outlet 12a, and finally be discharged from the equipment body. Therefore, by setting the first bent blade 2 inside the sewage tank 100, gas-liquid separation can be effectively achieved, reducing the possibility of liquid entering the gas suction device and causing damage to the gas suction device, and improving the stability and reliability of the cleaning equipment.

[0071] Furthermore, since the first bent blade 2 of this embodiment is disposed within the receiving cavity 10 of the sewage tank 100, the mixed gas can be directly separated into gas and liquid within the sewage tank 100. Therefore, there is no need to set up an additional gas-liquid separation device between the gas suction device and the sewage tank 100, which can reduce the space occupied by the equipment body, improve the space utilization of the equipment body, and thus facilitate the miniaturization and integration of the cleaning equipment.

[0072] In some embodiments of this application, the first twisted blade 2 and the first housing wall 11 are formed as an integral structure. This integral structure increases the strength and durability of the entire housing 1 and the first twisted blade 2, and reduces the number of parts, thus lowering assembly difficulty. For example, the first twisted blade 2 can be integrally injection molded with the first housing wall 11.

[0073] In some embodiments, the first twisted blade 2 and the first tank wall 11 can also be separate structures that are then assembled together. A separate structure facilitates the subsequent replacement and maintenance of the first twisted blade 2. Furthermore, a separate structure makes it easier for users to clean the tank body 1 of the sewage tank 100. Exemplarily, the first twisted blade 2 can be fixedly connected to the first tank wall 11 by means of bonding, snap-fitting, welding, etc.

[0074] The first curved blade 2 is fixedly connected to the first tank wall 11, which makes manufacturing easier and improves gas-liquid separation. Moreover, the integral structure can withstand greater impact and vibration, thus helping to extend the service life of the sewage tank 100.

[0075] In some embodiments, the first curved blades 2 are rotatably connected to the first housing wall 11. This allows the multiple first curved blades 2 to rotate relative to the first housing wall 11, thereby changing the angle of attack and direction of the airflow inlet, providing greater flexibility and adaptability. The cleaning equipment can adjust the angle and rotation speed of the first curved blades 2 as needed. For example, with a large volume of water, the angle and rotation speed of the multiple first curved blades 2 can be adjusted to generate a stronger vortex, thereby increasing centrifugal force. When increased suction is required (e.g., for vacuuming), the angle and rotation speed of the multiple first curved blades 2 can be adjusted to minimize their obstruction to the airflow. Furthermore, in some embodiments, when increased resistance or blockage is detected within the wastewater tank 100, the rotation direction of the multiple first curved blades 2 can be controlled to cut off or remove obstacles.

[0076] For example, a first rotating shaft may be provided on the first housing wall 11. A plurality of first curved and twisted blades 2 are spaced apart and connected to a first connecting member. The first connecting member is sleeved on the first rotating shaft and can drive the plurality of first curved and twisted blades 2 to rotate together with the rotation of the first rotating shaft.

[0077] In some embodiments of this application, such as Figure 4 and Figure 5As shown, the first curved blade 2 is bent from the air inlet 11a toward the third housing wall 13. Thus, the first curved blade 2 bends along the radial direction of the housing 1. This radial bending of the first curved blade 2 provides a smoother guiding channel for the mixed airflow entering the housing 1. When the mixed airflow enters the receiving cavity 10 through the air inlet 11a, it is less likely to collide directly with the housing wall, thus reducing the likelihood of turbulence. The mixed airflow can cut into the housing 1 along the curved surface of the first curved blade 2 at a certain tangential direction and angle, forming a rotation, thereby minimizing energy loss due to airflow impact. This allows the gas suction device to more efficiently convert the linear kinetic energy of the mixed airflow into rotational kinetic energy.

[0078] Furthermore, along the direction from the first housing wall 11 to the second housing wall 12, the first twisted blade 2 tilts towards the first housing wall 11. Consequently, the first twisted blade 2 also tilts along the axial direction of the housing 1. This axial tilting of the first twisted blade 2 guides the mixed airflow to form a spiraling three-dimensional flow field, thereby extending the action path of the first twisted blade 2. This allows liquid droplets in the mixed airflow to be more easily thrown towards the housing wall under centrifugal force. Moreover, this spiral motion makes the flow field of the mixed airflow more stable and the rotation speed faster, thus generating stronger centrifugal force. Even smaller water droplets can be separated, further reducing the possibility of liquid entering the gas suction device and improving its service life.

[0079] Furthermore, since the first curved blade 2 is inclined towards the first housing wall 11, the mutual interference between the rising and falling airflows can be reduced, thereby reducing the possibility of the separated liquid being re-rolled up.

[0080] In some embodiments of this application, along the extending direction of the first twisted blade 2, the angle between the first twisted blade 2 and the first housing wall 11 gradually decreases from the root 2a to the tail 2b. Specifically, along the extending direction of the first twisted blade 2, the root 2a of the first twisted blade is close to the air inlet 11a, and the tail 2b of the first twisted blade 2 is connected to the third housing wall 13.

[0081] Therefore, the first twisted blade 2 gradually slopes towards the first housing wall 11 from its root 2a to its tail 2b. In the projection plane perpendicular to the first direction, the projected area of ​​the first twisted blade 2 from its root 2a to its tail 2b gradually increases. Or, in other words, the dimension of the first twisted blade 2 from its root 2a to its tail 2b gradually increases along the circumferential direction of the housing 1.

[0082] When the mixed airflow flows into the receiving cavity 10 through the air inlet 11a, the larger angle between the root 2a of the first twisted blade and the first housing wall 11 more effectively guides the high-speed, straight-flowing airflow, converting the kinetic energy of the mixed airflow into rotational kinetic energy, thereby quickly establishing initial centrifugal force. This larger centrifugal force can initially eject some larger water droplets and particles, achieving preliminary gas-liquid separation. As the airflow flows along the first twisted blade 2 to its tail 2b, the angle between the tail 2b and the first housing wall 11 is smaller. This reduces the constraint and guidance effect on the airflow, thereby reducing frictional resistance and allowing the airflow to flow more smoothly and freely towards the third housing wall 13. Furthermore, this allows the airflow to expand and flow rapidly along the third housing wall 13, which in turn facilitates further separation of smaller droplets under the action of centrifugal force, achieving finer gas-liquid separation and a better separation effect.

[0083] Furthermore, the angle between the first curved blade 2 and the first housing wall 11 gradually decreases from its root 2a to its tail 2b, which helps to extend the gas-liquid separation path, making the separation of gas and liquid more thorough and further improving the reliability of the cleaning equipment. Moreover, this gradually decreasing angle makes the change in airflow direction continuous and gradual, thereby minimizing the possibility of airflow separating from the surface of the first curved blade 2 and generating vortices at the first curved blade 2, reducing energy loss and operating noise of the gas suction device.

[0084] In some embodiments of this application, the third housing wall 13 is arc-shaped. The outline of the tail portion 2b of the first twisted blade is tangent to the inner wall surface of the third housing wall 13.

[0085] The curved third chamber wall 13 provides an ideal circular motion path for the airflow, allowing it to rotate smoothly and at high speed along the curved wall. Centrifugal force is proportional to the square of the rotational speed. The curved third chamber wall 13 better maintains the high-speed rotation of the mixed airflow, allowing the mixed airflow to better separate into gas and liquid under the action of centrifugal force.

[0086] Furthermore, since the tail 2b of the first twisted blade 2 is tangent to the inner wall of the third housing wall 13, the mixed airflow flowing along the surface of the first twisted blade 2 can flow more smoothly towards the inner wall of the third housing wall 13 at the tail 2b of the first twisted blade 2, and rotate at high speed along the inner wall of the third housing wall 13, reducing the kinetic energy loss caused by the airflow directly impacting the third housing wall 13, and better achieving gas-liquid separation.

[0087] In some embodiments of this application, such as Figure 3 , Figure 6 and Figure 7As shown, the wastewater tank 100 also includes a plurality of second twisted blades 3 located within the receiving cavity 10. The second twisted blades 3 are connected to the second tank wall 12. The extension direction of the second twisted blades 3 is from the air outlet 12a toward the third tank wall 13. The plurality of second twisted blades 3 are arranged at intervals along the circumferential direction of the air outlet 12a. And along the first direction, the second twisted blades 3 are arranged at intervals from the first twisted blades 2.

[0088] Therefore, the wastewater tank 100 also includes a plurality of second curved blades 3. The second curved blades 3 are arranged at intervals from the first curved blades 2 along the first direction, which can reduce the possibility of interference between the first curved blades 2 and the second curved blades 3. Moreover, the spaced-apart first curved blades 2 and second curved blades 3 can form an annular path for airflow rotation between them.

[0089] Under the action of the first twisted blade 2, the mixed airflow smoothly and rapidly enters the annular path (inner wall of the third housing wall 13) between the first twisted blade 2 and the second twisted blade 3. Centrifugal force separates the heavier liquid from the gas, and the liquid adheres to the side wall of the annular third housing wall 13. At this time, because the gas suction device is still continuously suctioning, the separated liquid may continue to spiral upwards with the gas towards the outlet 12a. During its ascent, the separated liquid will collide with the second twisted blade 3, thus slowing it down. Under the influence of gravity, the liquid falls back to the first housing wall 11 and the third housing wall 13, further reducing the likelihood of the liquid flowing towards the gas suction device through the outlet 12a and reducing the possibility of damage to the gas suction device.

[0090] This application does not specifically limit the number of the second twisted blades 3, but can set them according to the actual size of the housing 1. Typically, the number of the second twisted blades 3 is the same as the number of the first twisted blades 2. Therefore, the second twisted blades 3 can better intercept the liquid and slow it down. Of course, in some other embodiments, the number of the second twisted blades 3 may differ from the number of the first twisted blades 2.

[0091] In some embodiments of this application, the second twisted blade 3 and the second housing wall 12 are formed as an integral structure. This integral structure increases the strength and durability of the entire housing 1 and the second twisted blade 3, and reduces the number of parts, thus lowering assembly difficulty. Exemplarily, the second twisted blade 3 can be integrally injection molded with the second housing wall 12.

[0092] In some embodiments, the second twisted blade 3 and the second tank wall 12 can also be separate structures that are then assembled together. The separate structure facilitates subsequent replacement and maintenance of the second twisted blade 3. Furthermore, the separate structure makes it easier for users to clean the tank body 1 of the sewage tank 100. Exemplarily, the second twisted blade 3 can be fixedly connected to the second tank wall 12 by means of bonding, snap-fitting, welding, etc.

[0093] The second curved blade 3 is fixedly connected to the second tank wall 12, which makes manufacturing easier and allows for better interception of separated liquids. Furthermore, the integrated structure can withstand greater impact and vibration, thus improving the service life of the wastewater tank 100.

[0094] In some embodiments, the second twisted blade 3 is rotatably connected to the second housing wall 12. This allows the plurality of second twisted blades 3 to rotate relative to the second housing wall 12, resulting in better flexibility and stronger self-cleaning capability.

[0095] For example, a rotatable second shaft may be provided on the second housing wall 12. A plurality of second twisted blades 3 are spaced apart and connected to the second connector. The second connector is sleeved on the second shaft and can drive the plurality of second twisted blades 3 to rotate together with the rotation of the second shaft.

[0096] In some embodiments of this application, such as Figure 6 and Figure 7 As shown, the second bent blade 3 is bent from the air outlet 12a toward the third housing wall 13. And along the direction from the second housing wall 12 toward the first housing wall 11, the second bent blade 3 is inclined toward the direction of the second housing wall 12.

[0097] Therefore, the second bent blade 3 bends radially along the housing 1 and tilts axially along the housing 1. A low-pressure zone typically forms below the outlet 12a, causing airflow to converge from all sides towards the outlet 12a. This convergence can be chaotic, easily generating eddies, resulting in some loss of air pressure and flow rate, potentially increasing the load on the gas suction device. The bent and tilted design of the second bent blade 3 provides a smoother channel for the separated gas, allowing the airflow to be guided orderly to the outlet 12a. This stabilizes the flow field in the upper part of the housing 1, reduces pressure fluctuations caused by airflow turbulence, and thus maintains the suction stability of the gas suction device.

[0098] In some embodiments of this application, along the extending direction of the second twisted blade 3, the angle between the second twisted blade 3 and the second housing wall 12 gradually decreases from the root 3a to the tail 3b. Specifically, along the extending direction of the second twisted blade 3, the root 3a of the second twisted blade is close to the air outlet 12a, and the tail 3b of the second twisted blade is connected to the third housing wall 13.

[0099] Therefore, the second twisted blade 3 gradually slopes towards the second housing wall 12 from its root 3a to its tail 3b. In the projection plane perpendicular to the first direction, the projected area of ​​the second twisted blade 3 from its root 3a to its tail 3b gradually increases. Or, in other words, the dimension of the second twisted blade 3 from its root 3a to its tail 3b gradually increases along the circumferential direction of the housing 1.

[0100] In this way, the second curved blade 3 can make the gas flow more smoothly to the outlet 12a, maintain the flow rate and pressure at the outlet 12a, which is beneficial to reduce the loss of gas flow rate, reduce the load on the gas suction device, and improve the service life of the gas suction device.

[0101] In some embodiments of this application, the angle between the end of the second bent blade 3 near the third housing wall 13 and the first direction is less than a preset threshold.

[0102] In this embodiment, the end of the second twisted blade 3 near the third housing wall 13, i.e., the tail 3b of the second twisted blade, is generally parallel to the first direction, and the angle between the tail and the first direction is close to 0 degrees. When the second housing wall 12 is a flat plate, the tail 3b of the second twisted blade 3 is generally perpendicular to the second housing wall 12.

[0103] The near-vertical arrangement of the tail 3b of the second twisted blade decelerates the airflow from the third housing wall 13 towards the second twisted blade 3. The tail 3b of the second twisted blade acts like a baffle 4, intercepting and disrupting the high-speed rotating airflow along the inner wall of the third housing wall 13, causing the liquid-carrying airflow to collide, resulting in energy loss and turbulence. When the liquid collides with the tail 3b of the second twisted blade, it is blocked, causing its velocity to drop sharply and fall back towards the first housing wall 11. The second twisted blade 3 creates a one-way path for the separated liquid, reducing the possibility of secondary liquid entrainment and further reducing the likelihood of the separated liquid flowing back towards the outlet 12a via the second twisted blade 3, resulting in better gas-liquid separation.

[0104] The embodiments of this application do not specifically limit the angle between the end of the second curved blade 3 near the third housing wall 13 and the first direction. It can be set according to the actual situation. Any solution that makes it difficult for the separated liquid to flow in the direction of the second curved blade 3 toward the air outlet 12a is within the protection scope of this application.

[0105] In some embodiments of this application, the second twisted blade 3 and the first twisted blade 2 are staggered in the circumferential direction. That is, when viewing the sewage tank 100 from the first tank wall 11 (looking down) or from the second tank wall 12 (looking up), the first twisted blade 2 and the second twisted blade 3 are not completely aligned. Specifically, in the same projection plane perpendicular to the first direction, the first twisted blade 2 and the second twisted blade 3 do not completely overlap.

[0106] The staggered arrangement of the first curved blade 2 and the second curved blade 3 extends the airflow path and ensures that the airflow entering the containment cavity 10 is continuously and uniformly guided, reducing the attenuation of centrifugal force and the chaos of the flow field. This reduces the possibility that some fluid will not flow through the first curved blade 2 and the second curved blade 3 and will flow directly out of the box 1 from the air outlet 12a, thus improving the gas-liquid separation reliability of the sewage tank 100.

[0107] In some embodiments of this application, such as Figure 3 As shown, a groove 13b is provided on the side of the third housing wall 13 facing the interior of the receiving cavity 10. The groove 13b is located between the first bent blade 2 and the second bent blade 3.

[0108] Thus, the groove 13b can be constructed as a liquid guide channel, allowing the third box wall 13 to better collect the separated liquid.

[0109] The liquid separated by the mixed airflow under centrifugal force forms a liquid film on the inner wall of the third chamber 13. The flow path of this liquid film is easily affected by the shear force of the airflow, which may lead to unstable flow. Because the inner wall of the third chamber 13 has grooves 13b, when the liquid film flows on the third chamber 13, it converges in the grooves 13b, thereby reducing the likelihood of the separated liquid continuously spiraling upwards to the outlet 12a. Furthermore, it also reduces the possibility of the separated liquid being entrained by gas and flowing towards the outlet 12a again.

[0110] In some embodiments of this application, such as Figure 3 As shown, the wastewater tank 100 also includes a baffle 4. The baffle 4 is connected to the side of the first curved blade 2 facing away from the air inlet 11a. Along the same projection plane perpendicular to the first direction, the projection of the air inlet 11a falls within the projection range of the baffle 4.

[0111] When the mixed gas enters the receiving cavity 10 through the inlet 11a, due to the high speed, some high-speed water droplets and part of the airflow may not have been effectively guided and rotated by the first twisted blade 2 before directly passing through the area of ​​the first twisted blade 2. This may cause part of the airflow to flow directly out of the receiving cavity 10 from the outlet 12a. In this embodiment, a baffle 4 is provided between the first twisted blade 2 and the second twisted blade 3, that is, the baffle 4 is located between the inlet 11a and the outlet 12a. In this way, when the mixed airflow enters the receiving cavity 10 from the inlet 11a, even if part of the airflow fails to flow along the curved surface of the first twisted blade 2, it will still collide with the baffle 4. The baffle 4 acts as a physical barrier and can intercept this part of the linearly moving high-energy droplets and airflow. After the droplets collide with the baffle 4, their kinetic energy will be weakened, so they can flow back to the first box wall 11 under the action of gravity, and move along the curved surface of the first twisted blade 2 under the action of suction, achieving gas-liquid separation under the action of eddies.

[0112] For example, the baffle 4 can be generally circular. When a high-speed airflow impacts the circular baffle 4, the airflow will spread out more evenly and smoothly along the circular contour. This uniform diffusion allows the airflow to transition more smoothly into the channels of the multiple first curved blades 2. Moreover, the circular baffle 4 can also reduce the possibility of vortices forming in the airflow at the corners, thereby reducing the energy loss of the airflow.

[0113] Of course, those skilled in the art should understand that the embodiments of this application do not specifically limit the shape of the baffle 4. Any solution that can block the airflow entering through the air inlet 11a from flowing directly to the air outlet 12a is within the protection scope of this application.

[0114] In some embodiments of this application, the portion of the baffle 4 opposite to the air inlet 11a has a first protrusion 41 that protrudes toward the air inlet 11a.

[0115] Therefore, when the mixed airflow impacts the baffle 4, it is less likely to cause violent and disorderly rebound, allowing the mixed airflow to diffuse more gently along the tangential direction of the arc surface of the first protrusion 41, thereby reducing the possibility of turbulence and splashing of the mixed airflow.

[0116] Moreover, the arc-shaped surface of the first protrusion 41 can guide the impacting airflow to a specific range in its circumference. Combined with the effect of gravity, these airflows are more likely to flow downward along the arc-shaped surface of the first protrusion 41, thereby better guiding these airflows to the first curved blade 2. This reduces the risk of droplets in the airflow being bounced back and carried back to the air outlet 12a by the airflow, thus improving the gas-liquid separation effect of the sewage tank 100.

[0117] For example, the first protrusion 41 is generally hemispherical. The hemispherical first protrusion 41 can diffuse the airflow evenly in all directions, so that each first twisted blade 2 surrounding the baffle 4 can obtain an equal amount and speed of airflow, thereby enabling multiple first twisted blades 2 to form a centrifugal cyclone more efficiently and stably, maximizing the gas-liquid separation efficiency in the sewage tank 100.

[0118] In some embodiments of this application, the projection of the first protrusion 41 falls at least partially within the projection range of the air inlet 11a along the same projection plane perpendicular to the first direction.

[0119] For example, the projected area of ​​the first protrusion 41 may be smaller than the projected area of ​​the air inlet 11a.

[0120] As another example, the projected area of ​​the first protrusion 41 can be larger than the projected area of ​​the air inlet 11a.

[0121] As another example, the projected area of ​​the first protrusion 41 can be equal to the projected area of ​​the air inlet 11a.

[0122] Since the projection of the first protrusion 41 falls at least partially within the projection range of the air inlet 11a, the airflow that impacts the baffle 4 will essentially all come into contact with the first protrusion 41, and thus be better guided by the first protrusion 41 to the multiple first curved blades 2.

[0123] When the mixed airflow flows into the receiving cavity 10 from the inlet 11a, its velocity and energy distribution are not uniform. Typically, the airflow velocity and kinetic energy are highest along the central axis of the inlet 11a. In some embodiments, the central axis of the first protrusion 41 overlaps with the central axis of the inlet 11a. This allows the first protrusion 41 to face the inlet 11a directly, ensuring that the portion of the airflow with the highest kinetic energy can reliably flow towards the first twisted blade 2, further reducing the possibility of the droplet-carrying airflow flowing directly towards the outlet 12a.

[0124] In some embodiments of this application, the outer edge of the baffle 4 is provided with a first extension 42 extending toward the air inlet 11a.

[0125] Therefore, the airflow blocked by the baffle 4 can be better guided to the first curved blade 2 by the action of the first extension 42, reducing the airflow from directly impacting the airflow ring that rotates at high speed in the circumferential direction along the third housing wall 13 from the edge of the baffle 4, and further improving the reliability and stability of gas-liquid separation.

[0126] In some embodiments of this application, the outer edge of the baffle 4 is provided with a second extension 43 extending toward the air outlet 12a.

[0127] Therefore, the second extension 43 can better guide the separated gas flowing upwards towards the outlet 12a. After passing through the first curved blade 2, the separated gas may exhibit some unstable eddies or inconsistent flow direction during its ascent. The second extension 43 can provide a certain guiding effect for the rising airflow, allowing it to converge more orderly and concentratedly towards the outlet 12a, thereby stabilizing the flow field, reducing airflow resistance, and increasing the extraction efficiency of the gas suction device.

[0128] In some embodiments of this application, such as Figure 3 As shown, a second protrusion 111 protruding towards the second housing wall 12 is provided on the side of the first housing wall 11 facing the second housing wall 12. The air inlet 11a is located on the second protrusion 111.

[0129] For example, the surface of the second protrusion 111 is formed as a slope. This reduces the possibility that the separated liquid and the liquid that has accumulated on the first housing wall 11 and the third housing wall 13 may flow back to the air inlet 11a along the housing wall.

[0130] In addition, the second protrusion 111 can also optimize the airflow path, so that the airflow through the air inlet 11a can be better guided to the first curved blade 2, reducing the energy loss at the air inlet 11a.

[0131] In some embodiments of this application, a third protrusion 121 protruding towards the first box wall 11 is provided on the side of the second box wall 12 facing the first box wall 11, and the air outlet 12a is located on the third protrusion 121.

[0132] Therefore, the third protrusion 121 can also play a certain blocking role, reducing the possibility that the liquid adhering to the second box wall 12 will flow along the direction of the box wall to the air outlet 12a, and further reducing the possibility that the liquid will enter the gas suction device.

[0133] In addition, the third protrusion 121 can also optimize the confluence path and stabilize the flow field. Specifically, the separated gas can be guided more smoothly and stably to the outlet 12a along the surface of the third protrusion 121, thereby reducing energy loss and pressure fluctuations caused by abrupt changes in flow direction, which is conducive to maintaining the continuous stability of suction.

[0134] In some embodiments of this application, the third housing wall 13 has a water outlet 13a, which is connected to the receiving cavity 10.

[0135] Therefore, the separated liquid in the sewage tank 100 can be discharged in a timely manner through the outlet 13a.

[0136] For example, the liquid can flow through the outlet 13a and the outlet pipe into the wastewater tank 100 of the base station. This eliminates the need for a large wastewater tank 100 on the cleaning equipment, which helps to reduce the weight of the cleaning equipment and facilitates its miniaturization and weight reduction.

[0137] Take a window cleaning machine as an example. A small wastewater tank (100ml) inside the machine is sufficient to support the cleaning operation, reducing its size and weight. This means the suction pump doesn't need to be too powerful to firmly adhere to glass and windows, saving energy. Furthermore, the smaller, lighter size makes operation easier and more convenient, improving the user experience.

[0138] Of course, those skilled in the art will understand that in some embodiments, the cleaning device itself may also have a water storage tank. The separated liquid flows into the water storage tank of the cleaning device through the outlet 13a and the outlet pipe.

[0139] The mixed airflow, accelerated and guided by the first curved blade 2, rotates at high speed along the circumferential direction of the third tank wall 13, and can separate the gas and liquid under the action of centrifugal force. The outlet 13a is formed on the third tank wall 13, so that once the liquid is separated, it can be quickly discharged from the sewage tank 100 from the outlet on the third tank wall 13, which helps to accelerate the emptying speed of the sewage tank 100 and thus helps to reduce the impact of excessive sewage on the gas-liquid separation effect of the sewage tank 100.

[0140] Specifically, the outlet 13a can be located on the groove 13b of the third tank wall 13, which is conducive to further accelerating the discharge speed of the liquid.

[0141] For example, the cleaning equipment also includes a liquid suction device connected to the outlet 13a.

[0142] Liquid suction devices include, but are not limited to, water pumps.

[0143] Therefore, the sewage in the sewage tank 100 can be extracted in a timely manner through the liquid suction device, which accelerates the discharge speed of the liquid and reduces the weight of the sewage tank 100, thereby facilitating the miniaturization and weight reduction of the cleaning equipment.

[0144] In some embodiments, the liquid suction device may also be installed in the base station of the cleaning system. The cleaning equipment and the base station can be connected by a piping assembly, so that the liquid discharged through the outlet 13a can flow back to the base station through the piping assembly.

[0145] In some embodiments of this application, there are multiple outlets 13a. The multiple outlets 13a are arranged at intervals along the circumferential direction of the third housing wall 13.

[0146] When cleaning equipment is performing cleaning operations, it may move or rotate in various directions. The liquid in the wastewater tank 100 will also flow under the influence of gravity. Therefore, providing multiple outlets 13a ensures that the separated liquid can flow steadily out of the tank 1 through the outlets 13a regardless of the direction in which the cleaning equipment moves, thereby improving the drainage efficiency of the wastewater tank 100 and reducing the possibility of water accumulation dead zones within the tank 1.

[0147] In addition, even if some of the outlets 13a become blocked, the liquid can still be discharged through other unblocked outlets 13a, further improving the drainage efficiency of the sewage tank 100.

[0148] In this embodiment, the number of outlets 13a is four. In some other embodiments, the number of outlets 13a may be fewer or more.

[0149] As a concrete example, the wastewater tank 100 integrates a water-air separation fan (first curved blade 2, second curved blade 3). The wastewater tank 100 has six openings. The upper opening is an exhaust port (air outlet 12a), the lower opening is an air inlet 11a, and the four side openings are drain outlets (water outlets 13a). The exhaust port is connected to a high-flow-rate fan (gas suction device). The air inlet 11a is connected to a water suction scraper (cleaning component). The four side drain outlets are connected to a single water pump (liquid suction device).

[0150] During operation, the exhaust vent draws wastewater into the wastewater tank 100 through the air inlet 11a. The gas is then smoothly accelerated into the central annular pipe by the lower fan blades (first curved blade 2) of the wastewater tank 100. Centrifugal force separates larger water droplets from the gas, causing them to adhere to the annular sidewall (inner wall of the third tank wall 13). Simultaneously, four drain outlets are located on the four sides of the ring, ensuring drainage in all four directions. The air inlet end of the upper fan blade (tail 3b of the second curved blade) is perpendicular to the ring, creating turbulence and significantly reducing gas speed, allowing water droplets to remain on the annular wall. The drain outlets promptly discharge wastewater, ensuring the wastewater tank 100's capacity and preventing excessive weight, which could lead to excessive wastewater and compromise the water-gas separation effect.

[0151] Because the wastewater tank 100 integrates a water-air separation fan, it increases the gas travel distance and divides the sucked-in wastewater into multiple airflows. The fan also uses vortices to accelerate the gas flow near the sidewall, thus slapping the wastewater against the sidewall for water-air separation. Furthermore, by designing the water-air separation fan within the wastewater tank 100 and connecting it to the wastewater pump (gas suction device), integration can be achieved, reducing the size of the equipment (cleaning equipment).

[0152] A baffle 4 is installed above the air inlet 11a. The projected area of ​​the baffle 4 is larger than that of the air inlet 11a, so that the baffle 4 completely covers the air inlet 11a, thus separating the air inlet 11a from the exhaust port. This arrangement ensures that sewage entering the sewage tank 100 is blocked by the baffle 4 and cannot directly enter the exhaust port from the middle. Instead, it is forced into the water-air separation fan under the action of suction, achieving water-air separation under the action of vortex. To better guide the airflow and allow it to disperse, the baffle 4 has a protrusion (first protrusion 41) in the middle towards the air inlet 11a. The outer periphery of the baffle 4 also has a protrusion (first extension 42) towards the air inlet 11a, which is also to better guide the airflow to the water-air separation fan (first curved blade 2). The outer periphery of the baffle 4 also has a protrusion (second extension 43) towards the exhaust port, which is to better concentrate the airflow in the middle and allow it to flow out through the exhaust port.

[0153] The air inlet 11a protrudes inward into the wastewater tank 100 (second protrusion 111) to prevent water from flowing back into the air inlet 11a from the side wall. The exhaust port protrudes inward into the wastewater tank 100 (third protrusion 121) to prevent water droplets accumulating on the upper wall of the wastewater tank 100 from flowing towards the exhaust port, thus acting as a barrier. The central water inlet is designed with a ring channel (groove 13b) for better water collection.

[0154] The lower fan blade tip (tail 2b of the first twisted blade) has a larger and gentler circumferential dimension and is tangential to the annular channel. This allows the gas to enter the annular channel more smoothly for acceleration.

[0155] The tip of the upper fan blade (the tail 3b of the second curved blade) is relatively vertical, causing the water to decelerate rapidly upon encountering the upper fan blade, preventing the liquid from rising and entering the exhaust port. Because the fluid rotates in the middle annular position and moves towards the exhaust port under the action of suction, it is blocked when it suddenly encounters the vertical part of the upper fan blade during its rotational movement, causing its speed to drop rapidly.

[0156] The upper and lower fan blades should be positioned significantly apart to prevent liquid from being drawn directly away from the exhaust vent.

[0157] The upper fan blades mainly serve to slow down the liquid and prevent it from spiraling upwards, thus preventing the liquid from being continuously spiraled upwards and drawn into the exhaust port.

[0158] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. 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. These 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, and all should be covered within the scope of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way.

Claims

1. A sewage tank, characterized in that, The wastewater tank, used in cleaning equipment, comprises: The housing includes a first housing wall, a second housing wall, and a third housing wall. The first housing wall and the second housing wall are arranged opposite each other along a first direction. The third housing wall connects the first housing wall and the second housing wall. The first housing wall, the second housing wall, and the third housing wall enclose a receiving cavity. The first housing wall has an air inlet, and the second housing wall has an air outlet. Both the air inlet and the air outlet communicate with the receiving cavity. A filter is provided at the air outlet. Multiple first-bend blades are located within the receiving cavity. The first-bend blades are connected to the first housing wall. The extension direction of the first-bend blades is from the air inlet to the third housing wall. The multiple first-bend blades are arranged at intervals along the circumferential direction of the air inlet.

2. The sewage tank according to claim 1, characterized in that, The first bent blade is bent from the air inlet toward the third housing wall and points toward the second housing wall along the first housing wall, and the first bent blade is inclined toward the first housing wall.

3. The sewage tank according to claim 2, characterized in that, Along the extension direction of the first bent blade, the angle between the first bent blade and the first housing wall gradually decreases from the root to the tail. Wherein, along the extending direction of the first twisted blade, the root of the first twisted blade is close to the air inlet, and the tail of the first twisted blade is connected to the third housing wall.

4. The sewage tank according to claim 3, characterized in that, The third housing wall is arc-shaped, and the tail contour of the first twisted blade is tangent to the inner wall surface of the third housing wall.

5. The sewage tank according to claim 1, characterized in that, The first bent blade and the first housing wall form an integral structure; or The first bent blade is rotatably connected to the first housing wall.

6. The sewage tank according to claim 1, characterized in that, The wastewater tank also includes a plurality of second twisted blades located within the containment cavity. The second twisted blades are connected to the second tank wall. The extension direction of the second twisted blades is from the air outlet to the third tank wall. The plurality of second twisted blades are arranged at intervals along the circumferential direction of the air outlet, and along the first direction, the second twisted blades are arranged at intervals from the first twisted blades.

7. The sewage tank according to claim 6, characterized in that, The second bent blade is bent from the air outlet toward the third housing wall and points toward the first housing wall along the second housing wall, and the second bent blade is inclined toward the second housing wall.

8. The sewage tank according to claim 7, characterized in that, Along the extension direction of the second twisted blade, the angle between the second twisted blade and the second housing wall gradually decreases from the root to the tail. Along the extension direction of the second twisted blade, the root of the second twisted blade is close to the air outlet, and the tail of the second twisted blade is connected to the third housing wall.

9. The sewage tank according to claim 6, characterized in that, The angle between the end of the second bent blade near the third housing wall and the first direction is less than a preset threshold.

10. The sewage tank according to claim 6, characterized in that, In the circumferential direction, the second twisted blade is staggered with the first twisted blade.

11. The sewage tank according to claim 6, characterized in that, The second twisted blade and the second housing wall form an integral structure; or The second twisted blade is rotatably connected to the second housing wall.

12. The sewage tank according to any one of claims 1 to 11, characterized in that, The wastewater tank also includes a baffle plate, which is connected to the side of the first twisted blade facing away from the air inlet. Along the same projection plane perpendicular to the first direction, the projection of the air inlet falls within the projection range of the baffle.

13. The sewage tank according to claim 12, characterized in that, The portion of the baffle opposite to the air inlet has a first protrusion that protrudes toward the air inlet.

14. The sewage tank according to claim 13, characterized in that, Along the same projection plane perpendicular to the first direction, the projection of the first protrusion at least partially falls within the projection range of the air inlet.

15. The sewage tank according to claim 12, characterized in that, The outer edge of the baffle is provided with a first extension that extends toward the air inlet.

16. The sewage tank according to claim 12, characterized in that, The outer edge of the baffle is provided with a second extension that extends toward the air outlet.

17. The sewage tank according to any one of claims 1 to 11, characterized in that, The first housing wall has a second protrusion protruding into the second housing wall on the side facing the second housing wall, and the air inlet is located on the second protrusion.

18. The sewage tank according to any one of claims 1 to 11, characterized in that, The second housing wall has a third protrusion protruding into the first housing wall on the side facing the first housing wall, and the air outlet is located on the third protrusion.

19. The sewage tank according to any one of claims 1 to 11, characterized in that, The third housing wall has a water outlet, which is connected to the receiving cavity.

20. The sewage tank according to claim 19, characterized in that, The number of water outlets is multiple, and the multiple water outlets are arranged at intervals along the circumferential direction of the third box wall.

21. The sewage tank according to any one of claims 6 to 11, characterized in that, The third housing wall has a groove on the side facing the inside of the receiving cavity. The groove is located between the first and second bent blades, and the water outlet is located on the groove.

22. A cleaning device, characterized in that, The cleaning equipment includes: Equipment body; and The sewage tank according to any one of claims 1 to 21 is disposed on the main body of the equipment.

23. The cleaning equipment according to claim 22, characterized in that, The cleaning equipment also includes a gas suction device, and the air inlet is connected to the gas suction device.

24. The cleaning equipment according to claim 22 or 23, characterized in that, The third housing wall has a water outlet, which is connected to the receiving cavity. The cleaning equipment also includes a liquid suction device, which is connected to the water outlet.

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