Water-air separation structure of a flat cleaner

Abstract

The utility model provides a water gas separation structure of plane cleaner, including separation subassembly and negative pressure subassembly, the separation cavity is shaped in separation subassembly, be equipped with negative pressure chamber in negative pressure subassembly, the separation cavity is connected negative pressure chamber through the air suction passage, the separation cavity is through the sewage suction passage and communicates with the outside world through the sewage suction mouth, be equipped with separation inclined plate in the separation cavity, be equipped with the air guide inclined plate in the separation cavity, and the air guide inclined plate and the sewage inlet are located separation inclined plate both sides setting respectively, the air guide inclined plate upper end corresponds with the air suction entrance, the air guide inclined plate lower end corresponds with separation inclined plate lower end, and the position height of air guide inclined plate lower end is lower than the position height of separation inclined plate lower end. The synergies of separation inclined plate and air guide inclined plate form directional airflow path, realize gas liquid delamination in the separation cavity, prevent sewage backwash simultaneously with the height difference design, have the advantages such as optimization gas liquid flow path, improve separation efficiency, prevent sewage backflow.

Description

Technical Field

[0001] This utility model relates to the field of cleaning equipment technology, and in particular to a water-air separation structure for a flat cleaner. Background Technology

[0002] In household cleaning, two traditional methods are commonly used for cleaning hard surfaces such as glass, tiles, and mirrors: one is to wipe directly with a damp towel, which easily leaves water stains on the surface and affects the cleaning effect; the other is to use a scraper with a dry towel to scrub, which requires repeated wiping and cleaning of water stains on the scraper, is tedious, and easily misses small areas. To solve these problems, various surface cleaning devices have emerged on the market.

[0003] In existing technologies, such as the wireless flat cleaner disclosed in patent CN113786120A, a combined design of a scraper head, water tank, and suction structure is used, with a blower module generating negative pressure to achieve wastewater suction. This device employs a complex flow-limiting structure including a guide shroud and baffles. While this can guide wastewater away from the air intake, this design has significant drawbacks: First, the complex flow-limiting structure interferes with airflow within the separation chamber, resulting in airflow loss; second, the multi-layered guiding structure increases airflow resistance, reducing suction efficiency; and third, this structural design increases manufacturing difficulty and maintenance costs. Furthermore, the water-air separation effect of this device still has room for improvement, especially when handling liquids of varying viscosities, where the separation efficiency is affected.

[0004] To address the aforementioned issues, existing technologies urgently need improvement. Utility Model Content

[0005] The purpose of this invention is to provide a water-air separation structure and its components for a planar cleaner, which has the advantages of optimizing the gas-liquid flow path, improving separation efficiency, and preventing sewage backflow.

[0006] This invention provides a water-air separation structure for a planar cleaner, including a separation component and a negative pressure component. The separation component has a separation chamber formed within it, and the negative pressure component has a negative pressure chamber within it. The separation chamber is connected to the negative pressure chamber via an air extraction channel, and the separation chamber is connected to the outside via a suction channel and a suction port. A drain port is provided at the bottom of the separation chamber. The air extraction inlet of the air extraction channel is located within the separation chamber, and the sewage inlet of the suction channel is located within the separation chamber, with the air extraction inlet at a higher position than the sewage inlet. A separation inclined plate is provided within the separation chamber, corresponding to the sewage inlet. The upper end of the separation inclined plate is close to the sewage inlet, and the lower end is away from the sewage inlet. An air guide inclined plate is provided within the separation chamber, with the upper end of the air guide inclined plate away from the sewage inlet and the lower end close to the sewage inlet. The air guide inclined plate and the sewage inlet are located on opposite sides of the separation inclined plate. The upper end of the air guide inclined plate corresponds to the air extraction inlet, and the lower end of the air guide inclined plate corresponds to the lower end of the separation inclined plate, with the lower end of the air guide inclined plate at a lower position than the lower end of the separation inclined plate.

[0007] Furthermore, the present invention also proposes that the horizontal distance from the air extraction inlet to the sewage inlet is greater than or equal to the horizontal distance from the lower end of the separation inclined plate to the sewage inlet.

[0008] Furthermore, the present invention also proposes that the extension line of the lower end of the separating inclined plate intersects with the air guide inclined plate.

[0009] Furthermore, the present invention also proposes that the air guide plate be part of the inner wall of the separation component.

[0010] Furthermore, the present invention also proposes that the separation inclined plate be fixed on the inner wall of the separation assembly.

[0011] Furthermore, the present invention also proposes that the separation component is fixedly combined with a front cover and a rear cover, the inner surface of the front cover and the inner surface of the rear cover together form a separation cavity, and the sewage inlet is formed on the rear cover.

[0012] Furthermore, the present invention also proposes that the separation inclined plate be fixed on the inner wall of the front cover.

[0013] Furthermore, the present invention also proposes that the air extraction channel be fixed on the rear cover.

[0014] Furthermore, the present invention also proposes a negative pressure assembly including a fan cover, a motor, and a fan blade. The fan cover is fixedly connected to the separation assembly. The negative pressure chamber is located inside the fan cover. The fan cover has a pressure relief chamber. The negative pressure chamber is connected to the air outlet of the air extraction channel. The fan blade is located inside the pressure relief chamber. The pressure relief chamber is connected to the negative pressure chamber. The motor is fixed inside the fan cover by a motor bracket. The fan cover has an exhaust port. The exhaust port is connected to the pressure relief chamber.

[0015] Furthermore, the present invention also proposes that the fan cover includes an upper cover and a lower cover that are fixedly connected, a sealing ring is provided between the upper cover and the lower cover, and a motor cover is also included. The motor cover fixes the motor inside the lower cover, the exhaust port is located on the lower cover, the sewage suction channel is fixed to the upper cover, and the air extraction outlet is formed on the upper cover; the motor cover is fixed to the upper end of the motor bracket, and the output shaft of the motor passes through the motor cover and is connected to the fan blades in a transmission.

[0016] As can be seen from the above, the water-air separation structure of the planar cleaner provided by the present invention forms a directional airflow path through the synergistic effect of the separation inclined plate and the air guide inclined plate, realizing gas-liquid stratification in the separation chamber. At the same time, the height difference design prevents sewage backflow, which has the advantages of optimizing the gas-liquid flow path, improving separation efficiency, and preventing sewage backflow. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is an exploded structural diagram of the present invention;

[0019] Figure 3 yes Figure 1 Schematic diagram of the AA section structure.

[0020] In the diagram: 1. Separation assembly; 11. Front cover; 12. Rear cover; 13. Separation chamber; 14. Drain outlet; 15. Separation ramp; 16. Air guide ramp; 2. Negative pressure assembly; 21. Upper cover; 22. Sealing ring; 23. Fan blade; 24. Motor cover; 25. Motor; 26. Motor bracket; 27. Lower cover; 271. Exhaust outlet; 28. Negative pressure chamber; 29. ​​Pressure relief chamber; 3. Air extraction channel; 31. Air extraction inlet; 32. Air extraction outlet; 4. Sewage suction channel; 41. Sewage suction port; 42. Sewage inlet. Detailed Implementation

[0021] The technical solution of this utility model will be described below with reference to the accompanying drawings and embodiments.

[0022] In existing technologies, household cleaning operations for hard surfaces suffer from cumbersome operation and unsatisfactory cleaning results. Traditional wet wiping methods easily leave water stains, and repeated operations with a scraper and dry towel are required. Existing equipment uses complex flow-limiting structures, which obstruct airflow, result in significant air volume loss, limit water-air separation efficiency, and lead to high maintenance costs. While a certain patent uses a combination of a flow guide and baffles to guide wastewater flow, the multi-layered flow-limiting design interferes with the airflow path, increases airflow resistance, and affects water absorption efficiency.

[0023] To address the aforementioned issues, the research and development process revealed that existing separation structures suffer from chaotic airflow organization and intersecting wastewater paths. Analysis of fluid dynamics characteristics showed that the key to simplifying the flow guidance structure while maintaining separation efficiency lies in optimizing the spatial distribution of airflow and wastewater. Through multiple fluid simulation experiments, it was found that a combination of inclined plates at specific angles can form an asymmetric flow channel, avoiding complex flow-limiting structures while achieving effective stratification. Ultimately, a scheme combining separation inclined plates and air guide inclined plates was adopted, with their spatial arrangement working together to control the fluid trajectory.

[0024] like Figure 1-3 As shown, this invention proposes a water-air separation structure for a planar cleaner, including a separation component 1 and a negative pressure component 2. The separation component 1 forms a separation chamber 13, and the negative pressure component 2 contains a negative pressure chamber 28. The separation chamber 13 is connected to the negative pressure chamber 28 via an air extraction channel 3, and the separation chamber 13 is connected to the outside via a suction channel 4 and a suction port. A drain port 14 is provided at the bottom of the separation chamber 13, and an air extraction inlet 31 is located within the separation chamber 13 at a height higher than the suction port 42 of the suction channel 4. A separation inclined plate 15 is provided within the separation chamber 13, with its upper end near the suction port 42 and its lower end away from the suction port 42. Simultaneously, an air guide inclined plate 16 is provided, with its upper end away from the suction port 42 and corresponding to the air extraction inlet 31, and its lower end near the suction port 42 but lower than the lower end of the separation inclined plate 15. The suction port 42 and the air guide inclined plate 16 are respectively located on both sides of the separation inclined plate 15.

[0025] The separation inclined plate 15 refers to the guide plate inclinedly installed in the separation chamber 13. It can be integrally molded with the separation chamber using injection molding technology. Its inclination angle can be set to 30-60 degrees. It is used to block sewage from flowing directly to the air extraction inlet 31 and guide sewage to settle, while also separating water and air. The air guide inclined plate 16 refers to the guide structure that forms a spatial fit with the separation inclined plate 15. It can be designed with a curved or flat surface and manufactured by stamping technology. It is used to guide the airflow to form a vortex to accelerate gas-liquid stratification. The height setting of the air extraction inlet 31 refers to its installation position being higher than the vertical distance of the sewage inlet 42, which is conducive to further water-air separation. The sewage outlet 42 refers to the opening located slightly lower than the separation chamber 13.

[0026] Specifically, when wastewater enters the separation chamber 13 through the suction port 41 and suction channel 4, the separation inclined plate 15 blocks liquid splashing and guides it to flow along the plate surface towards the discharge port 14. The air guide inclined plate 16 guides the negative pressure airflow to form a spiral motion, creating a stable airflow layer in the upper part of the separation chamber 13, accelerating droplet collision and aggregation. The asymmetrical flow channel formed by the two inclined plates causes the airflow to accelerate on the side of the air guide inclined plate 16, while a relatively static area is formed on the side of the separation inclined plate 15, promoting droplet settling. The structural design of the lower end of the air guide inclined plate 16 being lower than the lower end of the separation inclined plate 15 forms a liquid seal area, preventing wastewater from flowing back into the air extraction channel 4. The high-positioned air extraction inlet 31, in conjunction with the airflow guiding effect of the air guide inclined plate 16, effectively separates gas and liquid components.

[0027] Compared to existing technologies, traditional equipment employs a multi-layered baffle structure, resulting in a complex airflow path. This solution simplifies the flow guidance structure through a combination of two inclined plates. Existing technologies use a flow guide shroud and baffles to form multiple turning channels, increasing wind resistance. This solution utilizes the spatial arrangement of the inclined plates to create a unidirectional spiral airflow, reducing pressure loss. Compared to the flow-limiting structure in patent CN113786120A, this invention eliminates redundant flow guidance elements, achieving more efficient gas-liquid separation through the spatial arrangement of the two inclined plates, while also reducing the number of components for easier maintenance.

[0028] The above technical solutions effectively reduce the flow resistance of the airflow channel, improve the negative pressure suction efficiency, and reduce energy loss. The optimized flow channel layout enhances the gas-liquid separation effect, prevents liquid from entering the negative pressure chamber 28, and ensures stable equipment operation. The simplified structural design reduces manufacturing costs, facilitates cleaning and maintenance, adapts to the processing needs of liquids with different viscosities, and improves equipment reliability.

[0029] The present invention further proposes that the horizontal distance from the air extraction inlet 31 to the sewage inlet 42 is greater than or equal to the horizontal distance from the lower end of the separation inclined plate 15 to the sewage inlet 42.

[0030] The horizontal distance refers to the straight-line interval between two points measured along a direction parallel to the bottom surface of the separation chamber. This distance can be achieved using positioning measuring tools or mold forming processes. This distance relationship is used to control the spatial distribution of airflow and sewage flow paths. The position of the air extraction inlet 31, by adjusting its horizontal distance from the sewage inlet 42, can prevent negative pressure suction from directly interfering with the sewage entry area, thereby reducing the probability of unseparated liquid being sucked into the air extraction channel 31. The horizontal distance from the lower end of the separation inclined plate 15 to the sewage inlet 42 is achieved by fixing the inclined plate's installation position or optimizing the chamber structure. This distance defines the initial flow direction and settling path of the sewage within the separation chamber.

[0031] Specifically, when wastewater carrying airflow enters the separation chamber 13 from the inlet 42, the separation ramp 15 guides the wastewater downwards and accelerates liquid settling, while the air guide ramp 16 directs the airflow to the extraction inlet 31. Since the horizontal distance between the extraction inlet 31 and the inlet 42 is not less than the horizontal distance between the lower end of the separation ramp 15 and the inlet 42, the extraction inlet 31 is located in an area far from the wastewater entry path. This arrangement ensures that the airflow generated by negative pressure suction does not directly act on the turbulent area near the inlet 42, thus preventing high-speed airflow from carrying unsettled wastewater particles into the extraction channel 3. Simultaneously, the guiding effect of the separation ramp 15 and the position of the extraction inlet 31 work synergistically to ensure that the wastewater completes gas-liquid separation before reaching the discharge outlet, while the airflow flows stably along the air guide ramp 16 to the extraction inlet 31, achieving physical isolation of the gas-liquid flow paths.

[0032] By limiting the horizontal distance between the air extraction inlet 31 and the sewage inlet 42, the present invention keeps the air extraction area away from the sewage entry path. Combined with the directional guidance of the separation inclined plate 16, it effectively eliminates the interference of airflow on the sewage settling process.

[0033] Through the above technical solution, the present invention can reduce the mutual interference between airflow and sewage flow in the separation chamber 13, reduce the risk of unseparated liquid being sucked into the suction channel 3, thereby improving the water-air separation efficiency. This design maintains negative pressure suction while optimizing the spatial layout to achieve physical isolation of the gas-liquid paths, ensuring that sewage is fully settled before discharge and avoiding secondary suction.

[0034] The present invention further proposes a structural design in which the extension line of the lower end of the separation inclined plate 15 intersects with the air guide inclined plate 16.

[0035] The extension line at the lower end of the separation ramp 15 refers to the virtual straight line formed by extending the end of the separation ramp 15 along its tilt direction. This extension line is used to define the spatial relative position between the end of the separation ramp 15 and the air guide ramp 16. The intersection of the air guide ramp 16 means that the plate body of the air guide ramp 16 and the extension line of the separation ramp 15 form physical contact or spatial intersection, which can be achieved by matching the tilt angle and installation position of the two.

[0036] Specifically, inside the separation chamber 13, the virtual straight line extending from the end of the separation inclined plate 15 intersects with the solid air guide inclined plate 16. This causes the sewage particles blocked by the separation inclined plate 15 to slide down its surface under gravity and directly enter the area where the air guide inclined plate 16 is located. At the same time, the airflow at the end of the separation inclined plate 15 is guided to the surface of the air guide inclined plate 16, forming a continuous airflow channel. This structure avoids the vortex generated by the gap between the separation plate and the air guide plate in traditional designs, preventing sewage particles from accumulating at the bottom of the chamber or being lifted again by the airflow. After receiving the airflow at the end of the separation inclined plate 15, the air guide inclined plate 16 further directs the airflow towards the exhaust inlet 31, maintaining the continuity of the airflow path.

[0037] The present invention further proposes that the air guide plate 16 is part of the inner wall of the separation component 1.

[0038] The guide vane 16 refers to an inclined plate-like structure installed inside the separation chamber 13 to guide the airflow direction. Specifically, it can be integrally molded with the inner wall of the separation component 1. This structure is formed into a continuous surface with the wall of the separation chamber 13 through injection molding. The inner wall of the separation component 1 refers to the inner surface of the shell structure constituting the separation chamber 13. Specifically, it can be made of plastic injection molded parts, and its inner wall surface forms a smooth transition with the area of ​​the guide vane 16 by designing a specific inclination angle.

[0039] Specifically, the guide vane 16 is directly molded onto the inner wall of the separation assembly 1, forming a continuous integral structure with the wall of the separation chamber 13. When airflow passes through the separation chamber, the continuous surface of the guide vane 16 and the inner wall creates an uninterrupted flow path, avoiding seams or misalignment that would occur with independently installed guide vanes 16. During manufacturing, the guide vane 16 and the separation assembly 1 are formed through a single injection molding process, eliminating the need for subsequent assembly steps. When airflow containing contaminants enters the separation chamber 13 from the suction port 42, the continuous curved surface formed by the guide vane 16 and the inner wall guides the airflow in a predetermined direction, creating a stable swirling separation path between the separation vane 15 and the guide vane 16 for the gas-liquid mixture.

[0040] The present invention further proposes a structural design in which the separation inclined plate 15 is fixed to the inner wall of the separation component 1.

[0041] Among them, fixing refers to achieving a rigid connection between the separation inclined plate 15 and the inner wall of the separation component 1 through welding, bonding or integral molding. Specifically, it can be achieved by ultrasonic welding process, which can ensure that there are no gaps at the connection and that it has sufficient structural strength.

[0042] Specifically, the fixed connection between the separating inclined plate 15 and the inner wall of the separating component 1 forms a continuous integral structure, preventing relative displacement under airflow impact. When the polluted airflow enters the separating chamber 13 from the inlet 42, the separating inclined plate 15 is fixed at a preset tilt angle, guiding the airflow to form a stable vortex along its surface. Since no additional brackets or limiting structures are required, the internal flow channels of the separating chamber 13 remain unobstructed, avoiding assembly errors that may occur with traditional detachable connections. The relative position of the separating inclined plate 15 and the guide plate 16 is precisely controlled by the inner wall fixing method, ensuring a stepped drop at their lower ends, allowing the separated wastewater to be guided along the guide plate 16 to the discharge port 14.

[0043] The present invention further proposes that the separation component 1 is fixedly combined with a front cover 11 and a rear cover 12, the inner surface of the front cover 11 and the inner surface of the rear cover 12 together form a separation cavity 13, and the sewage inlet 42 is formed on the rear cover 12.

[0044] The fixed assembly of the front cover 11 and the rear cover 12 refers to the mechanical connection between two independently formed shell components, specifically through bolt or snap-fit ​​connections. This split structure avoids the excessively high precision requirements of integral injection molding. The separation chamber 13, formed by the inner surfaces of the front cover 11 and the rear cover 12, means that the inner curved surfaces of the two shell components cooperate to form a complete cavity. This design achieves a sealing effect through the matching shape of the contact surfaces, eliminating the need for additional sealing components. The sewage inlet 42, formed on the rear cover 12, means that the sewage inlet channel and the rear cover are formed by an integrated injection molding process. This layout causes the sewage inlet direction to form an inclined angle with the separation ramp 15, avoiding direct impact on the side wall of the cavity.

[0045] Specifically, the front cover 11 and the rear cover 12 are fastened together with bolts to form a sealed separation chamber 13. The inner curved surfaces of the two components form a continuous and smooth cavity surface after assembly. During injection molding, the rear cover 12 simultaneously forms a through-hole structure for the sewage inlet 42, the axis of which forms an angle of 30° to 60° with the plane of the separation inclined plate. When sewage enters the separation chamber 1 through the sewage inlet 42, its flow direction is changed by the obstruction of the separation inclined plate 15, and it flows downward along the surface of the inclined plate. The contact surfaces of the front cover 11 and the rear cover 12 are sealed by planar pressing, and the width of the contact surface can be controlled within the range of 3mm to 5mm, ensuring airtightness while reducing the requirements for processing precision.

[0046] This application further proposes that the separation ramp 15 be fixed to the inner wall of the front cover 11.

[0047] The separation inclined plate 15 refers to an inclined plate-like structure installed inside the separation chamber to guide the collision between sewage and airflow to achieve solid-liquid separation. Specifically, it can be integrally molded by injection molding or bolted to the inner wall of the front cover, ensuring structural stability through a rigid connection. The inner wall of the front cover 11 refers to the inner surface of the front cover 11 facing the separation chamber in the separation assembly. Specifically, it can adopt a structural design with reinforcing ribs or positioning grooves. Precise installation of the separation inclined plate 15 is achieved through integral molding or separate assembly with the front cover 11, utilizing the structural strength of the front cover to provide stable support for the separation inclined plate.

[0048] Specifically, when the front cover 11 and the rear cover 12 are combined to form the separation chamber 13, the separation inclined plate 15 is accurately positioned with a preset tilt angle and spatial position by being fixed to the inner wall of the front cover 11. After the airflow carries the sewage into the separation chamber 13, the rigid connection between the separation inclined plate 15 and the inner wall of the front cover 11 can prevent displacement caused by airflow impact or equipment vibration, maintaining the relative positional relationship between the separation inclined plate 15 and the sewage inlet 42 and the air guide inclined plate 16. The fixing method of the inner wall of the front cover 11 makes the separation inclined plate 15 an integral part of the internal structure of the separation chamber 13, eliminating the need for additional support components and reducing the cumulative errors that may occur during assembly. During dynamic operation, the fixed connection between the separation inclined plate 15 and the front cover 11 ensures that the sewage always collides with the plate surface along the preset path, achieving a stable droplet separation effect, while avoiding airflow turbulence caused by structural loosening.

[0049] The present invention further proposes that the air extraction channel 3 be fixed on the rear cover 12.

[0050] Among them, the air extraction channel 3 refers to the airflow channel used to connect the separation chamber 13 and the negative pressure chamber 28. Specifically, it can be implemented by a tubular structure integrally formed on the rear cover 12. This structure is directly aligned with the air extraction inlet 31 of the separation chamber 13 to ensure the straightness of the airflow path.

[0051] Specifically, the extraction channel 3 is directly fixed to the outer or inner wall of the rear cover 12 via injection molding or snap-fit ​​connection, forming a single assembly unit with the rear cover 12. During the assembly of the separation component 1, after the rear cover 12 and the front cover 11 are fixed with bolts or snaps, the extraction inlet 31 of the extraction channel 3 automatically aligns with the preset opening of the separation chamber 13 without additional adjustment. The extraction outlet 32 ​​of the extraction channel 3 extends to the corresponding interface of the negative pressure chamber 28, achieving an airtight connection through a sealing ring or interference fit. Since the extraction channel 3 is integrated with the rear cover 12, maintenance only requires disassembling the rear cover 12 to inspect the extraction channel 3, avoiding the cumbersome operation of separately disassembling the pipes in traditional designs.

[0052] The present invention further proposes a negative pressure component 2 including a fan cover, a motor 25 and a fan blade 23. The fan cover is fixedly connected to the separation component 1. The negative pressure chamber 28 is located inside the fan cover. The fan cover has a pressure relief chamber 29. The negative pressure chamber 28 is connected to the air outlet 32 ​​of the air extraction channel 3. The fan blade 23 is located inside the pressure relief chamber 29. The pressure relief chamber 29 is connected to the negative pressure chamber 28. The motor 25 is fixed inside the fan cover by a motor bracket 26. The fan cover has an exhaust port 271. The exhaust port 271 is connected to the pressure relief chamber 29.

[0053] The fan shroud refers to the housing structure surrounding the motor 25 and the fan blades 23. It can be implemented using a combination of separate injection-molded parts, serving to physically isolate the negative pressure chamber 28 and the exhaust chamber 29. The negative pressure chamber 28 is a low-pressure area directly connected to the extraction outlet 32. The exhaust chamber 29 is the extraction area containing the fan blades 23, used to discharge the airflow drawn into the negative pressure chamber 25 through the exhaust port 271, maintaining a continuous negative pressure in the negative pressure chamber 28. The motor bracket 26 is a fixed component supporting the motor 25, which can be implemented using a combination of a metal bracket and rubber shock-absorbing pads, used to isolate the impact of motor 25 vibration on airflow stability. The exhaust port 271 is the end opening of the gas discharge channel, which can be implemented using an inclined guide channel structure, used to establish an unobstructed airflow discharge path.

[0054] Specifically, the fan shroud and the separation assembly 1 are fixed together by a snap-fit ​​structure to form an integral seal, creating a straight airflow path between the negative pressure chamber 28 and the exhaust outlet 32. The negative pressure chamber 28 is connected to the exhaust chamber 29 through an annular channel, forming a directional airflow from the negative pressure chamber 28 to the exhaust chamber 29 when the fan blades rotate. The fan blades 23 are independently installed in the exhaust chamber 29, and the centrifugal force generated by their rotation accelerates the airflow circumferentially along the exhaust chamber 29, increasing the exhaust effect. The motor 25 is fixed by the motor bracket 26, and the output shaft passes through a sealed bearing and is connected to the fan blades 23 to ensure concentricity of power transmission. The exhaust port 271 is located at the tangential direction at the end of the exhaust chamber 29, allowing the pressurized airflow to be discharged.

[0055] The present invention further proposes a fan cover including an upper cover 21 and a lower cover 27 fixedly connected, a sealing ring 22 between the upper cover 21 and the lower cover 27, and a motor cover 24, which fixes the motor 25 inside the lower cover 27, an exhaust port 271 is provided on the lower cover 27, a sewage suction channel 4 is fixed on the upper cover 21, and an air extraction outlet 32 ​​is formed on the upper cover 21.

[0056] The upper cover 21 and lower cover 27 refer to two housing parts connected by snaps or bolts, which can be achieved using a split injection molding process, allowing for modular assembly of the internal cavities through a split structure. The sealing ring 22 is an annular rubber component located at the mating surface of the upper cover 21 and lower cover 27, made of nitrile rubber, used to prevent gas leakage between the negative pressure chamber and the pressure relief chamber. The motor cover 24 is a metal or plastic cover plate covering the top of the motor 25, which can be fixed to the inner wall of the lower cover 27 with screws, used to constrain the position of the motor 25 and create an independent installation space. The exhaust port 271 located in the lower cover 27 refers to a circular or rectangular through hole opened on the side wall of the lower cover 27, specifically located at the end of the pressure relief chamber, for direct gas discharge to the outside of the equipment. The suction channel 4 fixed to the upper cover 21 means that the tube of the suction channel 4 is embedded in a pre-set groove in the upper cover 12, or the two are integrally formed. The air extraction outlet 32 ​​is formed in the upper cover 12, which means that an opening with a tapered transition is integrally formed on the top of the upper cover 21. Specifically, it can be designed as a tapered section to guide the airflow smoothly into the negative pressure chamber 28.

[0057] Specifically, the separate structure of the upper cover 21 and the lower cover 27 allows for the separate installation of the suction channel 4 and the motor 25 assembly during assembly, avoiding interference between internal components. The sealing ring 22 is compressed at the joint surface of the two covers, forming an airtight isolation. The motor cover 24 is fixed to a pre-installed bracket inside the lower cover 27 by bolts. The exhaust port 271 is located on the side wall of the lower cover 27 near the bottom, aligned with the end of the pressure relief chamber 29, allowing the airflow to exit in a straight line.

[0058] The present invention further proposes that the motor cover 24 is fixed to the upper end of the motor bracket 26, and the output shaft of the motor 25 passes through the motor cover 24 and is connected to the fan blade 23 for transmission.

[0059] Specifically, the motor cover 24 and the upper end of the motor bracket 26 are fixedly connected to form an integral support structure, so that the vibration generated by the motor 25 during high-speed rotation is rigidly absorbed by the bracket, avoiding installation position displacement due to resonance. When the output shaft passes through the motor cover 24, an annular sealing structure is provided between the inner wall of the motor cover 24 and the output shaft.

[0060] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A water-air separation structure for a flat cleaner, comprising a separation component (1) and a negative pressure component (2), wherein the separation component (1) has a separation chamber (13) formed therein, the negative pressure component (2) has a negative pressure chamber (28) therein, the separation chamber (13) is connected to the negative pressure chamber (28) through an air extraction channel (3), and the separation chamber (13) is connected to the outside through a sludge suction channel (4) and a sludge suction port (41); a sludge discharge port (14) is provided at the bottom of the separation chamber (13), the air extraction inlet (31) of the air extraction channel (3) is located in the separation chamber (13), the sludge inlet (42) of the sludge suction channel (4) is located in the separation chamber (13), and the position height of the air extraction inlet (31) is higher than the position height of the sludge inlet (42); characterized in that, The separation chamber (13) is provided with a separation inclined plate (15), which is correspondingly arranged with the sewage inlet (42). The upper end of the separation inclined plate (15) is close to the sewage inlet (42), and the lower end of the separation inclined plate (15) is far away from the sewage inlet (42). The separation chamber (13) is provided with an air guide plate (16). The upper end of the air guide plate (16) is located away from the sewage inlet (42), and the lower end of the air guide plate (16) is located close to the sewage inlet (42). The air guide plate (16) and the sewage inlet (42) are respectively located on both sides of the separation plate (15). The upper end of the guide plate (16) corresponds to the air inlet (31), the lower end of the guide plate (16) corresponds to the lower end of the separation plate (15), and the position height of the lower end of the guide plate (16) is lower than the position height of the lower end of the separation plate (15).

2. The water-air separation structure of the planar cleaner according to claim 1, characterized in that, The horizontal distance between the air extraction inlet (31) and the sewage inlet (42) is greater than or equal to the horizontal distance between the lower end of the separation inclined plate (15) and the sewage inlet (42).

3. The water-air separation structure of the planar cleaner according to claim 2, characterized in that, The extension line of the lower end of the separation inclined plate (15) intersects with the air guide inclined plate (16).

4. The water-air separation structure of the planar cleaner according to claim 3, characterized in that, The air guide plate (16) is part of the inner wall of the separation assembly (1).

5. The water-air separation structure of the planar cleaner according to claim 4, characterized in that, The separation inclined plate (15) is fixed to the inner wall of the separation assembly (1).

6. The water-air separation structure of the planar cleaner according to any one of claims 1-5, characterized in that, The separation assembly (1) is fixedly assembled from a front cover (11) and a rear cover (12). The inner surface of the front cover (11) and the inner surface of the rear cover (12) together form the separation cavity (13), and the sewage inlet (42) is formed on the rear cover (12).

7. The water-air separation structure of the planar cleaner according to claim 5, characterized in that, The separation ramp (15) is fixed to the inner wall of the front cover (11).

8. The water-air separation structure of the planar cleaner according to claim 5, characterized in that, The air extraction channel (3) is fixed to the rear cover (12).

9. The water-air separation structure of the planar cleaner according to claim 1, characterized in that, The negative pressure assembly (2) includes a fan cover, a motor (25) and a fan blade (23). The fan cover is fixedly connected to the separation assembly (1). The negative pressure chamber (28) is located inside the fan cover. The fan cover has a pressure relief chamber (29). The negative pressure chamber (28) is connected to the air outlet (32) of the air extraction channel (3). The fan blade (23) is located inside the pressure relief chamber (29). The pressure relief chamber (29) is connected to the negative pressure chamber (28). The motor (25) is fixed inside the fan cover by a motor bracket (26). The fan cover has an exhaust port (271). The exhaust port (271) is connected to the pressure relief chamber (29).

10. The water-air separation structure of the planar cleaner according to claim 9, characterized in that, The fan cover includes an upper cover (21) and a lower cover (27) fixedly connected. A sealing ring (22) is provided between the upper cover (21) and the lower cover (27). It also includes a motor cover (24). The motor cover (24) fixes the motor (25) inside the lower cover (27). The exhaust port (271) is located on the lower cover (27). The sewage suction channel (4) is fixed to the upper cover (21). The air extraction outlet (32) is formed on the upper cover (21). The motor cover (24) is fixed to the upper end of the motor bracket (26). The output shaft of the motor (25) passes through the motor cover (24) and is connected to the fan blade (23) for transmission.

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