Surface cleaning device

Abstract

The surface cleaning device comprises a floor brush shell, a cleaning assembly arranged on the floor brush shell and a roller brush cover located above the cleaning assembly, the cleaning assembly comprises a cleaning roller, and the floor brush shell is provided with a dirt scraping part movably abutting against the cleaning roller, a liquid supply part located above the dirt scraping part and a dirt suction opening located below the dirt scraping part. The dirt scraping part can rotate relative to the liquid supply part so that the dirt scraping part can have a first position abutting against the cleaning roller and a second position separating from the cleaning roller, the liquid supply part is provided with a liquid supply face, and the dirt scraping part is located at the first position, and the dirt scraping part, the liquid supply face and the outer surface of the cleaning roller are matched to define a liquid storage tank. According to the cleaning device, cleaning liquid is accumulated in the liquid storage tank, the cleaning liquid in the liquid storage tank is driven to turn over and form overflowing water flow in cooperation with reverse rotation of the cleaning roller, dirt on the liquid supply piece and the roller brush cover can be washed, and residues of the dirt on the liquid supply piece and the roller brush cover are greatly reduced.

Description

Technical Field

[0001] This application belongs to the field of cleaning appliance technology, specifically relating to a surface cleaning device. Background Technology

[0002] Existing surface cleaning devices such as floor scrubbers, vacuum cleaners, and sweepers that utilize live water cleaning technology generally include a brush housing, a cleaning component housed within the brush housing, and a roller brush cover above the cleaning component. The cleaning component includes a cleaning roller, and the brush housing also has a scraping element that abuts against the cleaning roller, a liquid supply element above the scraping element, and a suction port below the scraping element. During operation, clean water is continuously sprayed onto the cleaning roller or the surface to be cleaned through the liquid supply element. The wet cleaning roller rotates and wipes the surface to be cleaned, the scraping element removes dirt or liquid from the cleaning roller, and the suction fan operates to remove the dirt or liquid from the surface to be cleaned or scraped off. After cleaning, surface cleaning devices typically leave residue on the cleaning rollers, liquid supply components, and brush caps. To reduce dirt buildup, existing surface cleaning devices are equipped with self-cleaning systems. These systems include a base where the device is placed, with the cleaning roller positioned in a cleaning tank. The liquid supply component provides water to the roller, which rotates, and a scraper scrapes away dirt or liquid to achieve self-cleaning. While these systems effectively remove most of the residual dirt, some of the scraped dirt is thrown onto the brush cap and liquid supply component during the self-cleaning process. Consequently, after self-cleaning, dirt or residue remains on the brush cap and liquid supply component due to contact between the scraper and the roller. This necessitates manual removal of the brush cap and roller to wipe or clean the exposed liquid supply component, significantly reducing the user experience.

[0003] Patent document CN116269104A discloses a cleaning device, including a housing, a roller brush, a roller brush cover assembly, and a drive assembly. The roller brush is rotatably mounted on the housing. The roller brush cover assembly includes a movable cover plate. The drive assembly is configured to apply a force to the movable cover plate, causing it to move towards the roller brush, thereby driving the movable cover plate to move and occupy a first position and a second position. In the first position, the movable cover plate contacts the roller brush under the action of the drive assembly; in the second position, the movable cover plate separates from the roller brush. Therefore, in this technical solution, when the movable cover plate presses against the roller brush, the roller brush can automatically clean the movable cover plate, avoiding the burden of manual operation. However, this type of cleaning method has the following drawbacks: Firstly, during the self-cleaning process, the movable cover plate and the scraper also come into contact with the roller brush. Both of these contacts generate significant resistance to the rotation of the roller brush, leading to a sharp increase in the load on the motor driving the roller brush and increased power consumption, which is not conducive to energy saving. Secondly, during the self-cleaning process, the contact between the movable cover plate, the scraper, and the roller brush intensifies the wear of the bristles on the outside of the roller brush, causing its cross-sectional area to continuously decrease. This weakens the contact force between the scraper and the outer surface of the roller brush, resulting in a poorer scraping effect of the scraper on the cleaning components, or even an inability to scrape the dirt, thus affecting the cleaning effect of the cleaning equipment. Furthermore, although this technical solution can achieve automatic cleaning of the movable cover plate, the contact between the scraper and the cleaning roller results in poor cleaning of the liquid supply components, especially at the transition point between the liquid supply components and the movable cover plate, easily creating hard-to-clean dead zones. Utility Model Content

[0004] This application provides a surface cleaning device to solve the technical problems of existing surface cleaning devices, which have poor cleaning effect on the liquid supply component when using a movable roller brush cover to clean the roller brush cover and the liquid supply component, and are prone to cleaning dead corners at the joint between the roller brush cover and the liquid supply component, and cause greater wear on the bristles outside the cleaning roller.

[0005] The technical solution adopted in this application is as follows:

[0006] A surface cleaning device includes a floor brush housing, a cleaning assembly disposed on the floor brush housing, and a roller brush cover located above the cleaning assembly. The cleaning assembly includes a cleaning roller. The floor brush housing is provided with a scraping element that movably abuts against the cleaning roller, a liquid supply element located above the scraping element, and a suction port located below the scraping element. The scraping element is rotatable relative to the liquid supply element, so that the scraping element has a first position abutting against the cleaning roller and a second position disengaging from the cleaning roller. The liquid supply element has a liquid supply surface. In the first position, the scraping element, the liquid supply surface, and the outer surface of the cleaning roller cooperate to form a liquid storage tank.

[0007] During the cleaning process, some dirt is thrown onto the liquid supply component and the roller brush cover as the cleaning roller rotates. This dirt is difficult to remove. This application addresses this issue by having a scraper contact the cleaning roller to form a liquid storage tank between the scraper, the liquid supply surface, and the outer surface of the cleaning roller. At this time, the water pump operates, and the cleaning fluid accumulates in the storage tank, thus soaking and softening the dirt on the surface of the liquid supply component. When the cleaning roller reverses direction, the dirt on the cleaning roller is squeezed by the scraper, further accumulating liquid in the storage tank, causing the liquid level to rise continuously. The rotation of the cleaning roller causes the cleaning fluid in the storage tank to surge and form a flowing current, thereby... The system washes away dirt from the liquid supply unit and the roller brush cover, then detaches the scraper from the cleaning roller, creating a gap that opens the liquid storage tank. This connects the liquid storage tank above the scraper to the suction port, activating the suction fan and forming an upper suction channel. Dirt or liquid in the storage tank is released through the gap created by the scraper detaching from the cleaning roller and is then drawn into the suction port for collection. This avoids the problem of dirt accumulating and adhering in the storage tank after the liquid has washed the roller brush cover and liquid supply unit. It achieves automatic cleaning of the roller brush cover and liquid supply unit, further improving the self-cleaning effect of the surface cleaning device and reducing the burden on users.

[0008] Compared to existing technologies that require moving the brush cover to contact the cleaning roller for cleaning, resulting in ineffective cleaning of the transition area between the liquid supply component and the brush cover: Firstly, this application, by configuring the scraper to be movable relative to the liquid supply component, cooperates with the cleaning roller and the liquid supply component in a first position to form a liquid storage tank. The reverse rotation of the cleaning roller squeezes out the liquid on the cleaning roller, and the liquid continuously accumulates in the storage tank. As the cleaning roller rotates, the cleaning liquid flows within the storage tank and washes the liquid supply component and the transition area between the liquid supply component and the brush cover, avoiding cleaning dead zones and improving the overall cleaning effect, thus providing a wider cleaning range. Secondly, during the self-cleaning operation, the brush cover in this application does not need to move to a state of contact with the cleaning roller. The self-cleaning operation mainly relies on the flow and rinsing of the cleaning liquid, which does not significantly increase the rotational resistance of the cleaning roller. Therefore, the rotation of the cleaning roller is smoother, the motor load is reduced, power consumption is reduced, and energy saving is greater. Furthermore, during the self-cleaning operation of this application, the brush cover does not need to move to a state of contact with the cleaning roller, thereby avoiding the brush cover contacting the cleaning roller. The wear of the outer tufts extends the service life of the cleaning roller. Simultaneously, the reduced wear ensures stable contact force between the scraper and the cleaning roller, helping to maintain the cleaning effect of the scraper on the cleaning roller. Furthermore, the cleaning mode in existing technologies, which relies on the movement of the roller brush cover to achieve cleaning, is relatively fixed and cannot be flexibly adjusted according to actual needs. In contrast, the self-cleaning operation mode in this application can be flexibly adjusted through the supply of cleaning fluid and the rotation direction of the cleaning roller. For example, when deep cleaning is required, the supply of cleaning fluid can be increased to enhance… The overflowing water flow effectively cleans the liquid supply unit, the transition area between the liquid supply unit and the roller brush cover, and even the inner wall of the roller brush cover. For example, during routine cleaning, the amount of cleaning liquid supplied can be reduced to save resources. Furthermore, when the scraping component is in the first position, the cleaning roller can be controlled to alternately rotate in reverse and forward to clean the liquid supply unit and the transition area between the liquid supply unit and the roller brush cover in both directions, improving the cleaning effect on both. This flexibility allows the surface cleaning device in this application to adapt to different cleaning needs, greatly improving the user experience.

[0009] The scraping component includes a scraper extending toward the cleaning roller, the scraper being located at the lower part of the front side of the liquid supply component, the scraping component being in the first position, and the upper surface of the scraper forming part of the bottom of the liquid storage tank.

[0010] When the scraper contacts the cleaning roller to scrape off dirt, some dirt will remain on the upper surface of the scraper blade. As dirt accumulates on the upper surface of the scraper blade, if it is not cleaned in time, when the scraper blade contacts the cleaning roller again after the self-cleaning operation is completed, the dirt on the upper surface of the scraper blade will cause secondary contamination to the cleaning roller. This technical solution involves placing the scraper at the lower front of the liquid supply component. In the first position, the upper surface of the scraper forms part of the bottom of the liquid storage tank. When cleaning liquid accumulates in the storage tank, it can cover the upper surface of the scraper, effectively soaking and softening the dirt adhering to the scraper's surface. When a flowing water stream forms in the storage tank, it can carry away at least some of the dirt on the scraper's surface, reducing dirt residue. When the scraper is in the second position, the cleaning liquid flowing downwards from the storage tank to the suction port washes over the upper surface of the scraper, improving the cleaning effect and preventing dirt residue on the scraper's surface, thus avoiding secondary contamination of the cleaning roller by the scraper.

[0011] When the scraper is in the second position, the liquid storage tank is opened to form an upper suction channel between the outer surfaces of the scraper and the cleaning roller, connecting the liquid storage tank and the suction port. The dirt and / or liquid in the liquid storage tank are drawn away and collected by the suction port.

[0012] During self-cleaning operations, some contaminants accumulate in the liquid storage tank. If not cleaned promptly, some particles will settle and re-adhere to the outer surface of the cleaning roller, while other contaminants will float and re-adhere to the liquid supply unit, the transition area between the liquid supply unit and the roller brush cover, and the inner wall of the roller brush cover. This technical solution utilizes the movement of the scraper to rotate it away from the cleaning roller, thereby forming an upper suction channel connecting the liquid storage tank and the suction port between the scraper and the outer circumference of the cleaning roller. The contaminants and / or dirt in the storage tank flow downwards along the upper suction channel and are sucked into the suction port, thus achieving centralized collection and treatment of contaminants and liquids. This avoids secondary contamination of the cleaning roller, liquid supply unit, and roller brush cover by contaminants, improving the cleaning effect.

[0013] The distance D1 between the liquid supply component and the outer surface of the cleaning roller is greater than the distance D2 between the roller brush cover and the outer surface of the cleaning roller, so as to form a liquid flow contraction section communicating with the liquid storage tank between the roller brush cover and the outer surface of the cleaning roller.

[0014] After the cleaning fluid accumulates in the reservoir, it needs to flow effectively between the brush cover and the cleaning roller to clean the inner wall of the brush cover. This technical solution creates a fluid flow contraction section between the outer surfaces of the brush cover and the cleaning roller, connected to the reservoir. This increases the flow velocity of the cleaning fluid as it flows from the reservoir to the contraction section, creating a high-speed flow. This effectively guides the cleaning fluid from the reservoir to the contraction section and also achieves high-speed scouring of the transition area between the brush cover and the supply component, as well as the inner wall of the brush cover. This enhances the scouring force on the brush cover, effectively removing dirt, especially stubborn dirt, and significantly improving the cleaning effect on the transition area between the brush cover and the supply component, as well as the inner wall of the brush cover.

[0015] The roller brush cover has a transition portion that abuts against the top of the liquid supply component, the transition portion being located above the highest point of the cleaning roller.

[0016] This technical solution places the transition section where the roller brush cover abuts against the liquid supply component above the highest point of the cleaning roller. This not only utilizes the centrifugal force of the reverse rotation of the cleaning roller to drive the cleaning liquid to move within the storage tank, but also utilizes the wall adhesion effect of the cleaning liquid to guide it upwards under the guidance of the transition section, allowing it to flow more smoothly from the storage tank into the liquid flow contraction section. Furthermore, the cleaning liquid can scour the transition section as it flows through it, improving the cleaning effect at the transition section.

[0017] The outer surfaces of the transition section, the liquid supply component, and the cleaning roller cooperate to form a transition section that connects the liquid storage tank and the liquid flow contraction section. The upper part of the liquid supply component is arc-shaped to form a first guide surface extending into the transition section, and the cleaning roller has a second guide surface extending into the transition section.

[0018] The transition section design in this technical solution allows the cleaning fluid to flow smoothly from the storage tank to the fluid converging section. This smooth transition effectively reduces resistance during the fluid flow process, ensuring that the cleaning fluid can flow more efficiently to the fluid converging section. Furthermore, the design of the first guide surface on the supply component and the second guide surface on the cleaning roller guides the cleaning fluid, making its flow smoother and reducing the formation of eddies and turbulence. This reduces noise from the fluid flow and improves cleaning efficiency. In addition, the design of the first guide surface makes the side of the supply component facing the cleaning roller arc-shaped, facilitating both the guidance of the cleaning fluid and the flushing of the supply component itself, thereby improving the cleaning effect of the cleaning fluid on the supply component.

[0019] The liquid flow contraction section extends downward at an angle from the side connected to the liquid storage tank to the side away from the liquid storage tank, so as to form a flushing channel between the roller brush cover and the cleaning roller.

[0020] In this technical solution, the downward-sloping extension of the liquid flow contraction section allows the cleaning fluid to flow from the storage tank to the liquid flow contraction section during the self-cleaning process. When the scraper is in the first position and the liquid supply unit sprays liquid to accumulate cleaning fluid in the storage tank, the cleaning fluid flows from the storage tank to the liquid flow contraction section during the reverse rotation of the cleaning roller. Due to the inclined design of the liquid flow contraction section, the cleaning fluid not only flows under the influence of the cleaning roller's movement but also flows from the end closer to the storage tank to the end farther away under its own gravity, thus rinsing the roller brush cover and improving the cleaning effect. Furthermore, the inclined design of the liquid flow contraction section increases the flow velocity of the cleaning fluid as it passes through the section, forming a high-speed liquid flow, which more effectively washes away dirt on the roller brush cover, improving the cleaning effect and efficiency.

[0021] The liquid storage tank forms a movement space for the scraper to rotate. The cleaning assembly also includes a rotating component located around the liquid supply component. The scraper is located on the upper end face of the rotating component, so that the rotating component drives the scraper to rotate around the liquid supply component in the movement space.

[0022] Compared to existing technologies where the scraper is fixed to contact the cleaning roller or moves along the front-to-back direction to contact or disengage from the cleaning roller, this application requires the scraper to rotate relative to the liquid supply component to contact or disengage from the cleaning roller. Therefore, sufficient space needs to be provided between the cleaning roller and the brush housing for the scraper to move. This space also forms the basis for the existence of the liquid storage tank. In this solution, the liquid storage tank creates a space for the scraper to rotate, satisfying both the scraper's movement requirements and the need for liquid storage during self-cleaning operations. Furthermore, by placing the scraper on the upper surface of the rotating component and allowing it to rotate around the liquid supply component, this solution effectively utilizes the space within the liquid storage tank to switch the scraper's position, thereby forming the liquid storage tank and opening the upper suction channel. This arrangement makes the cleaning component's structure more compact and rational, facilitating the overall layout and installation of the surface cleaning device.

[0023] The scraper is provided with a dynamic seal, which rotates with the scraper to seal the dynamic gap between the scraper and the liquid supply component and wipe the front surface of the liquid supply component; the upper surface of the dynamic seal at least partially covers the scraper to cooperate with the scraper to form the bottom of the liquid storage tank.

[0024] The rotating component surrounding the liquid supply unit provides the necessary transmission for the surface cleaning device to drive the scraper to rotate relative to the liquid supply unit. However, this also creates a dynamic gap between the liquid supply unit and the scraper. This dynamic gap provides a channel for dirt and grime to enter the brush housing, both during cleaning and self-cleaning operations. To prevent dirt and grime from entering the brush housing through this gap, a dynamic seal is incorporated into the scraper. This seal prevents cleaning fluid sprayed from the liquid supply unit or grime ejected by the cleaning roller from entering the brush housing through the dynamic gap, effectively protecting the electronic components inside the brush housing and ensuring the stability and reliability of the surface cleaning device. Furthermore, the dynamic seal, rotating with the scraper, wipes the front surface of the liquid supply unit, further enhancing the cleaning effect, especially on stubborn stains adhering to its surface. Compared to technical solutions that simply sandwich a dynamic seal between the liquid supply component and the scraper, this technical solution ensures that the upper surface of the dynamic seal at least covers the scraper, thus forming a tight fit. This provides a more comprehensive seal to the bottom area of ​​the storage tank, further reducing the probability of liquid leakage into the dynamic gap. Furthermore, during the rotation of the scraper, the dynamic seal's wiping action on the liquid supply component generates a reverse force, extending a portion of the dynamic seal above the scraper. This portion exerts a pulling effect on the entire dynamic seal, maintaining a better seal between it and the scraper. This reduces the probability of deformation of the dynamic seal and the probability of liquid from the storage tank seeping into the space between the scraper and the liquid supply component through the joint between the dynamic seal and the scraper, further ensuring a tight seal.

[0025] The lower front part of the liquid supply component is provided with a guide groove located above the scraper and opening downwards. The dynamic seal includes a screw-in and screw-out portion that rotates along the guide groove and abuts against and seals with the liquid supply component. The scraper is in the second position, and a portion of the screw-in and screw-out portion rotates out from the guide groove. The front surface of the screw-out portion of the screw-in and screw-out portion cooperates with the upper surface of the scraper to form a flushing and drainage surface.

[0026] In this technical solution, the guide groove on the lower front side of the liquid supply component and the screw-in / screw-out part on the dynamic seal provide guidance for the rotational movement of the scraper, making its rotation more stable. The downward-facing opening of the guide groove prevents cleaning fluid accumulated in the reservoir or ejected during the cleaning roller's operation from easily entering the guide groove, thus reducing the probability of cleaning fluid and dirt entering the brush housing through the dynamic gap between the liquid supply component and the scraper. When the scraper is in the second position, a portion of the screw-in / screw-out part screws out of the guide groove, while the remaining portion remains within it. This prevents the dynamic seal from completely detaching from the guide groove. When the scraper switches from the second position to the first position, the screw-in / screw-out part can easily continue sliding along the guide groove without needing to reposition itself, ensuring the stability of the dynamic seal's position. Furthermore, when the scraper is in the second position, the front surface of the rotating part of the screw-in and rotating part and the upper surface of the scraper can cooperate to form a flushing and guiding surface. When the suction motor is running, as the sewage in the storage tank flows to the suction port through the upper suction channel, the presence of the flushing and guiding surface can guide the sewage to flush the front surface of the rotating part of the screw-in and rotating part and the upper surface of the scraper, reducing the amount of dirt adhering to both and improving the cleaning effect.

[0027] The liquid supply component is provided with a scraper located in front of the screw-in and screw-out portion. The scraper and the liquid supply component cooperate to form the guide groove. The end of the scraper abuts against the screw-in and screw-out portion to wipe the front surface of the screw-in and screw-out portion.

[0028] In this technical solution, a scraper is provided on the front side of the liquid supply component, and the guide groove is formed by the cooperation of the scraper and the liquid supply component, which simplifies the structural design of the liquid supply component and reduces the processing difficulty. When the scraper is in the second position, a portion of the screw-in / screw-out part screws out from the guide groove and is exposed to the upper suction channel. Since some dirt and sludge may adhere to the front surface of the screw-out part, when the scraper switches from the second position to the first position, it drives the screw-in / screw-out part to rotate synchronously. The end of the scraper wipes the front surface of the screw-in / screw-out part, which can effectively clean the front surface of the screw-in / screw-out part and prevent dirt and sludge from entering the guide groove with the screw-in / screw-out part. This further reduces the probability that dirt and sludge will enter the floor brush housing through the dynamic gap between the scraper and the liquid supply component. Attached Figure Description

[0029] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0030] Figure 1This is a cross-sectional view of a floor brush according to one embodiment of Embodiment 1 of this application;

[0031] Figure 2 This is a perspective view of the structure of the brush portion in one embodiment of Example 1 of this application;

[0032] Figure 3 This is a partial detail view of the floor brush housing in one embodiment of this application, which shows a schematic diagram of the state when the scraping component is in the first position. The arrow indicates the rotation direction of the cleaning roller, and the large and small bubbles indicate the cleaning liquid and / or dirt.

[0033] Figure 4 This is a partial detail view of the floor brush housing in one embodiment of Embodiment 1 of this application, which shows a schematic diagram of the state when the scraping component is in the second position, wherein large and small bubbles indicate cleaning liquid and / or dirt liquid;

[0034] Figure 5 This is a partial cross-sectional view of a ground brush according to one embodiment of Example 2 of this application;

[0035] Figure 6 for Figure 5 The enlarged view of part A shows a schematic diagram of the state when the scraper is in the first position, where large and small bubbles indicate cleaning fluid and / or dirt.

[0036] Figure 7 This is a partial detail view of the floor brush housing in one embodiment of Embodiment 2 of this application, which shows a schematic diagram of the state when the scraping component is in the second position, wherein large and small bubbles indicate cleaning fluid and / or dirt.

[0037] in,

[0038] 1. Cleaning roller; 101. First roller brush; 102. Second roller brush;

[0039] 2. Roller brush cover; 21. Transition section;

[0040] 3. Liquid storage tank;

[0041] 4. Transition section;

[0042] 5. Liquid flow contraction section;

[0043] 6. Liquid supply component; 61. First guide surface; 62. Guide arc surface; 63. Scraper component; 64. Guide groove; 65. Liquid supply surface;

[0044] 7. Scraper; 71. Scraper blade; 711. Scraper section; 712. Guide section; 72. Comb teeth;

[0045] 8. Dynamic seal; 81. Screw-in / screw-out part; 82. Positioning part; 83. Sealing part;

[0046] 9. Suction port;

[0047] 10. Upper suction channel;

[0048] 11. Floor brush housing;

[0049] 12. Rotating component. Detailed Implementation

[0050] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0051] Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of this application and the features thereof can be combined with each other.

[0052] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0053] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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, an electrical connection, or a communication 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 this application according to the specific circumstances.

[0054] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0055] Surface cleaning devices for cleaning surfaces include handheld cleaning machines such as floor scrubbers and vacuum cleaners, and self-propelled cleaning machines such as robotic vacuum cleaners and mopping robots. Examples 1 and 2 below use floor scrubbers as examples to illustrate this application. Those skilled in the art will understand that this solution can also be applied to any of the above-mentioned surface cleaning devices for cleaning surfaces.

[0056] The surface cleaning device includes a main body and a floor brush pivotally connected to the main body. The floor brush includes a brush housing with a rotating cleaning roller on the housing for wiping the surface to be cleaned. The cleaning roller can be a single cleaning roller, a double cleaning roller, a tracked cleaning roller, or any other wiping component that can rotate to wipe the surface to be cleaned. The brush housing also includes a liquid supply component for supplying liquid to the cleaning roller or the surface to be cleaned, a scraper component for scraping dirt off the cleaning roller, and a suction port for absorbing dirt. The suction port, scraper component, and liquid supply component are arranged sequentially in the direction of rotation of the cleaning roller. When cleaning the surface, the liquid supply component provides cleaning liquid to wet the cleaning roller, and the surface to be cleaned is wiped as the wet cleaning roller rotates. The suction port is usually connected to a suction channel and a dirt container located on the floor brush and / or the main body, and a suction motor operates to generate suction force at the suction port. Some of the dirt on the surface to be cleaned enters the suction port under the suction force, while some of the dirt adhering to the cleaning roller is peeled off by the scraper and then enters the suction port under the suction force.

[0057] Example 1:

[0058] like Figures 1 to 4As shown, a surface cleaning device includes a body (not shown) and a floor brush housing 11 hinged to the body, a cleaning assembly disposed on the floor brush housing 11, a roller brush cover 2 located above the cleaning assembly, a liquid supply system, and a suction system. The body also includes a power source system. The liquid supply system includes a clean water tank (not shown), a water pump (not shown), and a liquid supply component 6. The suction system includes a wastewater tank (not shown), a suction fan (not shown), and a suction channel (not shown) for connecting the suction port 9 and the wastewater tank. In this embodiment, the clean water tank... The wastewater tank and the suction fan are mounted on the machine body. The cleaning components include a cleaning roller 1, a scraper 7 that moves and abuts against the cleaning roller 1 on the floor brush housing 11, a liquid supply 6 located above the scraper 7, and a suction port 9 located below the scraper 7. The scraper 7 rotates relative to the liquid supply 6 so that the scraper 7 has a first position that abuts against the cleaning roller 1 and a second position that disengages from the cleaning roller 1. The liquid supply 6 has a liquid supply surface 65. The scraper 7 is in the first position. The scraper 7, the liquid supply surface 65 and the outer surface of the cleaning roller 1 cooperate to form a liquid storage tank 3.

[0059] In this embodiment, the scraping component 7 includes a scraper 71 and a comb-like component 72; the floor brush housing 11 is also provided with a rotating component 12, which is located on the periphery of the lower part of the liquid supply component 6 and rotates along the lower part of the liquid supply component 6. The scraper 71 and the comb-like component 72 are disposed on the upper end surface of the rotating component 12. The scraping component 7 includes a bent section, which is sandwiched between the rotating component 12 and the liquid supply component 6, thereby driving the scraping component 7 to rotate toward or away from the cleaning roller 1, so that the scraping component 7 is in a first position of contacting the cleaning roller 1 and a second position of disengaging from the cleaning roller 1. A power component (not shown in the figure) is also included, which is a motor, and the motor drives the rotating component 12 to rotate through a transmission structure. The liquid supply component 6 includes a cavity (not shown in the figure) with multiple flow channels and a liquid supply plate with multiple liquid supply holes. An opening is provided at the front of the cavity, and the liquid supply plate covers the opening so that the liquid supply holes communicate with the flow channels. The liquid in the clean water tank is supplied to the cleaning roller 1 or the surface to be cleaned through the liquid supply holes of the liquid supply component 6. In this embodiment, the liquid supply surface 65 is the outer surface of the liquid supply plate. The scraper 71 and the comb 72 move to the first position that abuts against the cleaning roller 1. The outer surfaces of the scraper 7, the liquid supply component 6 and the cleaning roller 1 cooperate to form a liquid storage tank 3. A portion of the scraper 7 forms the bottom of the liquid storage tank 3. When the scraper 7 rotates, the bottom of the liquid storage tank 3 closes, causing the liquid flow to accumulate in the liquid storage tank 3 when the cleaning roller 1 reverses. As the scraper 7 rotates and disengages from the cleaning roller 1, the suction fan operates, the bottom of the liquid storage tank 3 opens, and the dirty liquid or dirt in the storage tank 3 is released. The storage tank 3 is connected to the suction port 9 to form an upper suction channel, and the dirty liquid and dirt are drawn into the suction port 9 for collection.

[0060] Of course, it is understandable that the scraping component 7 may only include scraper 71 or comb teeth 72.

[0061] This application does not limit the type of liquid supplied by the liquid supply component 6. It can be water, a cleaning solution made of water and detergent, or a cleaning solution made of water, detergent, disinfectant, etc.

[0062] This application does not limit the connection method between the roller brush cover 2 and the floor brush housing 11. It can be fixedly installed on the floor brush housing 11 and cannot be removed, or it can be detachably installed on the floor brush housing 11. The detachable methods between the two include, but are not limited to, magnetic attraction and snap-fit.

[0063] During the cleaning process, some dirt is thrown onto the liquid supply component 6 and the roller brush cover 2 as the cleaning roller 1 rotates. This dirt is difficult to remove. This application addresses this by having the scraper 7 contact the cleaning roller 1 to form a liquid storage tank 3 between the scraper 7, the liquid supply surface 65, and the outer surface of the cleaning roller 1. At this time, the water pump operates, and the cleaning liquid accumulates in the storage tank 3, thereby soaking and softening the dirt on the surface of the liquid supply component 6. When the cleaning roller 1 rotates in reverse, the dirt on the cleaning roller 1 is squeezed by the scraper 7, and the liquid further accumulates in the storage tank 3, causing the liquid level to rise continuously. As the cleaning roller 1 rotates, it causes the cleaning liquid in the storage tank 3 to surge and form a flowing water flow, which can wash away the dirt on the liquid supply component 6 and the roller brush cover 2, significantly reducing the residue of dirt on the liquid supply component 6 and the roller brush cover 2. Figure 3 As shown, the arrow indicates the reverse direction of the cleaning roller 1, which is the opposite of the forward rotation direction of the cleaning roller 1 during the cleaning operation.

[0064] Compared to existing technologies that require moving the brush cover to contact the cleaning roller for cleaning, resulting in ineffective cleaning of the transition area between the liquid supply component and the brush cover: On one hand, this application configures the scraper 7 to be movable relative to the liquid supply component 6, so that in a first position it cooperates with the cleaning roller 1 and the liquid supply component 6 to form a liquid storage tank 3. By utilizing the reverse rotation of the cleaning roller 1, the liquid on the cleaning roller is squeezed out, and the liquid in the storage tank continuously accumulates. As the cleaning roller rotates, the cleaning liquid flows within the storage tank 3 and washes the liquid supply component 6 and the transition area between the liquid supply component 6 and the brush cover 2, avoiding… This design eliminates cleaning dead spots, improving overall cleaning effectiveness and providing a wider cleaning range. Furthermore, during self-cleaning, the roller brush cover 2 does not need to move to a position where it contacts the cleaning roller 1. Self-cleaning relies primarily on the flow and rinsing of the cleaning fluid, which does not significantly increase the rotational resistance of the cleaning roller 1. Therefore, the rotation of the cleaning roller 1 is smoother, the motor load is reduced, power consumption is decreased, and energy saving is achieved. Moreover, during self-cleaning, the roller brush cover 2 does not need to move to a position where it contacts the cleaning roller 1, thus avoiding any contact between the roller brush cover 2 and the cleaning roller. The wear of the outer circumferential bristles extends the service life of the cleaning roller 1. Simultaneously, the reduced wear of the bristles ensures stable contact force between the scraping element 7 and the cleaning roller 1, helping to maintain the cleaning effect of the scraping element 7 on the cleaning roller 1. Furthermore, in the prior art, the cleaning mode achieved by moving the roller brush cover 2 is relatively fixed and cannot be flexibly adjusted according to actual needs. In contrast, the self-cleaning operation mode in this application can be flexibly adjusted through the supply of cleaning fluid and the rotation direction of the cleaning roller 1. For example, when deep cleaning is required, the supply of cleaning fluid can be increased to enhance the diffusion effect. The gushing water flow effectively cleans the liquid supply component 6, the transition area between the liquid supply component 6 and the roller brush cover 2, and even the inner wall of the roller brush cover 2. For example, during daily cleaning, the amount of cleaning liquid supplied can be reduced to save resources. Furthermore, when the scraping component 7 is in the first position, the cleaning roller 1 can be controlled to alternately rotate in reverse and forward to clean the liquid supply component 6 and the transition area between the liquid supply component 6 and the roller brush cover 2 in both directions, thereby improving the cleaning effect on both. This flexibility allows the surface cleaning device in this application to adapt to different cleaning needs and greatly improves the user experience.

[0065] The self-cleaning process of the roller brush cover 2 and the liquid supply component 6 in this application is roughly as follows: the scraper component 7 moves to the first position to contact the cleaning roller 1, the liquid supply component 6 supplies liquid to the cleaning roller 1, the cleaning roller 1 absorbs the cleaning liquid, the cleaning roller 1 reverses, the scraper component 7 squeezes the liquid in the cleaning roller 1 to enter the liquid storage tank 3, during the reverse process of the cleaning roller 1, the liquid in the liquid storage tank 3 continuously accumulates to wet and rinse the liquid supply component 6 and the roller brush cover 2, when the liquid collides with the liquid supply component 6 and the roller brush cover 2, some of the liquid flows back to the cleaning roller 1, thereby achieving synchronous cleaning of the cleaning roller 1. When the scraper 7 switches from the first position to the second position, the cleaning roller 1 stops rotating, the liquid storage tank 3 is opened, and the dirt and liquid above flow downward to the suction port 9. At the same time, the suction motor works to collect the dirt and liquid. When the scraper 7 switches from the second position to the first position again, the cleaning roller 1 rotates forward, the suction motor works, and the dirt and liquid are sucked into the suction port 9 from the downward suction channel formed between the cleaning roller 1, the surface to be cleaned, and the suction port 9, or from the downward suction channel formed between the cleaning roller 1, the base station matched with the surface cleaning device, and the suction port 9.

[0066] In this embodiment 1, the scraper 7 can rotate relative to the liquid supply 6, so that the scraper 7 can have any of the states described in the following embodiments:

[0067] Implementation method one: such as Figure 3 and Figure 4 As shown, the scraper 7 has a first position that contacts the cleaning roller 1 and a second position that disengages from the cleaning roller 1 and brings the front end of the scraper 7 close to the suction port 9. The scraper 7 rotates between the first and second positions. In the second position, the scraper 7 disengages from the cleaning roller 1 and abuts against the front end of the suction port 9. That is, the scraper 7 rotates between the first and second positions to have both a scraping state that contacts the cleaning roller 1 and a yielding state that disengages from the cleaning roller 1 and abuts against the front end of the suction port 9. Figure 3 As shown, it provides a schematic diagram of the cleaning component 7 in the cleaning state; as Figure 4The diagram shows the scraper 7 in the avoidance state. In the first position, the scraper 7 contacts the cleaning roller 1, effectively scraping away dirt adsorbed on the cleaning roller 1. It forms a lower suction channel between the scraper 7, the cleaning roller 1, the surface to be cleaned, and the suction port 9, or between the cleaning roller 1, the base station matched with the surface cleaning device, and the suction port 9, helping to ensure the suction force of the lower suction channel and thus improving the dirt removal effect. In the second position, the scraper 7 disengages from the cleaning roller 1, and its front end approaches the suction port 9. The upper suction channel 10 opens, the suction motor operates, and the dirt scraped off in the upper suction channel 10 is guided to the suction port 9, improving the dirt collection efficiency. In the avoidance state, the wear of the scraper 7 on the cleaning roller 1 is reduced, extending the service life of the cleaning roller 1. It also reduces the rotational resistance of the cleaning roller 1, reducing the load on the drive motor used to drive the rotation of the cleaning roller 1, thereby reducing energy consumption.

[0068] Implementation method 2: The scraper 7 has a first position that abuts against the cleaning roller 1 and a second position that disengages from the cleaning roller 1 and brings the front end of the scraper 7 close to the suction port 9. The scraper 7 rotates between the first position and the second position to have a scraping state that abuts against the cleaning roller 1, a avoidance state that disengages from the cleaning roller 1 and stops against the front end of the suction port 9, and an intermediate state between the scraping state and the avoidance state. The scraper 7 has an intermediate state between the scraping state and the avoidance state. This intermediate state can be a state in which the scraper 7 has shallow contact with the surface of the cleaning roller 1 (i.e., the amount of contact between the scraper 7 and the surface of the cleaning roller 1 in the intermediate state is less than the amount of contact between the scraper 7 and the surface of the cleaning roller 1 in the scraping state), or a state in which the scraper 7 has no contact with the surface of the cleaning roller 1 and the front end of the scraper 7 is between the surface of the cleaning roller 1 and the suction port 9 (i.e., the position when not rotated to the avoidance state). That is, the scraper 7 can also have a third position, a fourth position or even more positions between the first position and the second position. The existence of intermediate states makes the stopping position of the scraper 7 more possible, so that the position of the scraper 7 can be adjusted according to actual needs to meet different cleaning effects.

[0069] When the scraper 7 comes into contact with the cleaning roller 1 to scrape the cleaning roller 1, some dirt will remain on the upper surface of the scraper 71 of the scraper 7. As dirt accumulates on the upper surface of the scraper 71, if it is not cleaned in time, after the self-cleaning operation is completed, when the scraper 71 comes into contact with the cleaning roller 1 again, the dirt on the upper surface of the scraper 71 will cause secondary contamination to the cleaning roller 1. Therefore, as a preferred embodiment of this application, such as Figure 3As shown, the scraping component 7 includes a scraper 71 extending toward the cleaning roller 1. The scraper 71 is located at the lower part of the front side of the liquid supply component 6. In the first position, the upper surface of the scraper 71 forms part of the bottom of the liquid storage tank 3. By setting the scraper 71 at the lower part of the front side of the liquid supply component 6 and in the first position, so that the upper surface of the scraper 71 forms part of the bottom of the liquid storage tank 3, when cleaning liquid accumulates in the liquid storage tank 3, the cleaning liquid can cover the upper surface of the scraper 71, which helps to effectively soak and soften the dirt attached to the upper surface of the scraper 71. When a flowing water flow is formed in the liquid storage tank 3, it can carry away at least part of the dirt on the upper surface of the scraper 71, reducing the residue of dirt on the scraper 71. When the scraper 7 is in the second position, as... Figure 4 As shown, the cleaning liquid flowing downward from the liquid storage tank 3 to the suction port 9 will also scour the upper surface of the scraper 71, thereby improving the cleaning effect on the upper surface of the scraper 71, avoiding dirt residue on the upper surface of the scraper 71, and thus avoiding secondary contamination of the cleaning roller 1 by the scraper 71.

[0070] During the self-cleaning process, some dirt accumulates in the liquid storage tank 3. If not cleaned in time, some particles will settle and re-adhere to the outer surface of the cleaning roller 1, while some dirt will float and re-adhere to the liquid supply component 6, the transition area between the liquid supply component 6 and the roller brush cover 2, and the inner wall surface of the roller brush cover 2. As a preferred embodiment of this application, such as... Figure 4 As shown, the scraper 7 is in the second position, and the liquid storage tank 3 is open, forming an upper suction channel 10 between the scraper 7 and the outer surface of the cleaning roller 1, connecting the liquid storage tank 3 and the suction port 9. Dirt and / or waste liquid in the liquid storage tank 3 are collected by the suction port 9. In this embodiment, the scraper 7 rotates away from the cleaning roller 1 by its movement, thereby forming an upper suction channel 10 between the scraper 7 and the outer peripheral surface of the cleaning roller 1, connecting the liquid storage tank 3 and the suction port 9. The waste liquid and / or dirt in the liquid storage tank 3 flow downwards along the upper suction channel 10 and are sucked into the suction port 9, thus achieving centralized collection and treatment of dirt and waste liquid, avoiding secondary contamination of the cleaning roller 1, the liquid supply unit 6, and the roller brush cover 2, and improving the cleaning effect.

[0071] To prevent cleaning fluid or dirt from entering the interior of the floor brush housing 11 from the joint between the roller brush cover 2 and the liquid supply component 6 when the liquid storage tank 3 is storing liquid and during the operation of the cleaning roller 1, preferably, a sealing component is provided at the joint between the roller brush cover 2 and the liquid supply component 6.

[0072] In this application, the distance between the liquid supply component and the outer surface of the cleaning roller, and the distance between the roller brush cover and the outer surface of the cleaning roller, can be any one of the following embodiments:

[0073] Implementation Method 3: This implementation method 3 is not illustrated. In this implementation method 3, the distance between the liquid supply component and the outer surface of the cleaning roller is equal to or less than the distance between the roller brush cover and the outer surface of the cleaning roller.

[0074] Implementation Method Four: (e.g.) Figure 3 As shown, the distance D1 between the liquid supply component 6 and the outer surface of the cleaning roller 1 is greater than the distance D2 between the roller brush cover 2 and the outer surface of the cleaning roller 1, so as to form a liquid flow contraction section 5 that communicates with the liquid storage tank 3 between the outer surfaces of the roller brush cover 2 and the cleaning roller 1. After the cleaning liquid accumulates in the liquid storage tank 3, it needs to flow effectively between the roller brush cover 2 and the cleaning roller 1 in order to clean the inner wall surface of the roller brush cover 2. This fourth embodiment forms a liquid flow contraction section 5, which communicates with the liquid storage tank 3, between the outer surface of the roller brush cover 2 and the cleaning roller 1. This increases the flow velocity of the cleaning liquid as it flows from the liquid storage tank 3 to the liquid flow contraction section 5, creating a high-speed liquid flow. This effectively guides the cleaning liquid from the liquid storage tank 3 to the liquid flow contraction section 5 and also achieves high-speed scouring of the transition area between the roller brush cover 2 and the liquid supply component 6, as well as the inner wall surface of the roller brush cover 2. This enhances the scouring force on the roller brush cover 2, effectively removing dirt, especially stubborn dirt, and significantly improving the cleaning effect on the transition area between the roller brush cover 2 and the liquid supply component 6, as well as the inner wall surface of the roller brush cover 2. Moreover, the smaller the gap, the more pronounced the capillary effect. When the liquid in the liquid storage tank 3 overflows to the transition position between the liquid supply component 6 and the roller brush cover 2, due to the capillary effect, some of the liquid flow is accelerated and guided to the liquid flow contraction section 5 to clean the roller brush cover 2.

[0075] As a preferred example of this implementation, such as Figure 3 As shown, the roller brush cover 2 has a transition portion 21 that abuts against the top of the liquid supply component 6, and the transition portion 21 is located above the highest point of the cleaning roller 1. By setting the transition portion 21, which abuts against the liquid supply component 6, above the highest point of the cleaning roller 1, the cleaning liquid can not only be driven to move in the liquid storage tank 3 by the centrifugal force of the reverse rotation of the cleaning roller 1, but also the wall adhesion effect of the cleaning liquid can be used to guide the cleaning liquid to climb upward under the guidance of the transition portion 21 so as to flow more smoothly from the liquid storage tank 3 into the liquid flow contraction section 5. Moreover, the cleaning liquid can scour the transition portion 21 when it flows through it, thereby improving the cleaning effect at the transition portion 21.

[0076] As a preferred example of this implementation, such as Figure 3As shown, the outer surfaces of the transition section 21, the liquid supply component 6, and the cleaning roller 1 cooperate to form a transition section 4 that connects the liquid storage tank 3 and the liquid flow contraction section 5. The upper part of the liquid supply component 6 is arc-shaped to form a first guide surface 61 extending into the transition section 4, and the cleaning roller 1 has a second guide surface extending into the transition section 4. The design of the transition section 4 allows the cleaning liquid to flow smoothly from the liquid storage tank 3 to the liquid flow contraction section 5. This smooth transition can effectively reduce the resistance during the flow of the cleaning liquid, ensuring that the cleaning liquid can flow to the liquid flow contraction section 5 more efficiently. Moreover, the setting of the first guide surface 61 on the liquid supply component 6 and the design of the second guide surface on the cleaning roller 1 can guide the cleaning liquid, making the flow of the cleaning liquid smoother, reducing the formation of eddies and turbulence, thus reducing the noise of the cleaning liquid flow and improving the cleaning efficiency. In addition, the design of the first guide surface 61 makes the side of the liquid supply component 6 facing the cleaning roller 1 arc-shaped, which facilitates the guidance of the cleaning liquid and also facilitates the rinsing of the liquid supply component 6 by the cleaning liquid, thereby improving the cleaning effect of the cleaning liquid on the liquid supply component 6.

[0077] It should be noted that the second guide surface refers to the outer circumferential surface of the cleaning roller. The cleaning roller includes a roller brush and a cleaning cloth covering the roller brush. The cleaning cloth is covered with bristles, so the second guide surface is not in a relatively smooth shape like the first guide surface. The second guide surface refers more to the roughly arc-shaped guide shape that the cleaning roller presents in the position opposite to the first guide surface.

[0078] Furthermore, considering that the distance between the liquid supply component 6 and the outer surface of the cleaning roller 1 is greater than the distance between the roller brush cover 2 and the outer surface of the cleaning roller 1, the transition section 4 has a funnel-shaped design that narrows from one end connected to the liquid storage tank 3 to the other end connected to the liquid flow contraction section 5. The funnel-shaped transition section 4 can achieve a smooth transition of fluid from the liquid storage tank 3 to the liquid flow contraction section 5, so that the liquid will not generate violent disturbances or eddies due to the sudden change in cross-sectional area when entering the liquid flow contraction section 5, thereby reducing energy loss and flow resistance, and facilitating the smooth flow of liquid from the liquid storage tank 3 to the liquid flow contraction section 5 to clean the roller brush cover 2.

[0079] The shape of the fluid constriction section in this application can adopt any of the following embodiments:

[0080] Implementation Method 5: This implementation method 5 is not illustrated. In this implementation method 5, the roller brush cover extends horizontally from the side connected to the liquid storage tank to the side away from the liquid storage tank, and the liquid flow contraction section extends horizontally from the side connected to the liquid storage tank to the side away from the liquid storage tank.

[0081] In a specific example, the cleaning roller includes a first roller brush, a second roller brush, and a cleaning element surrounding the outside of the first and second roller brushes. The outer diameter of the first roller brush is equal to the outer diameter of the second roller brush. In conjunction with the horizontal extension of the roller brush cover, the liquid flow contraction section also extends horizontally from the side connected to the liquid storage tank to the side away from the liquid storage tank.

[0082] Implementation method six: The liquid flow contraction section extends downward at an angle from the side connected to the liquid storage tank to the side away from the liquid storage tank, so as to form a flushing channel between the roller brush cover and the cleaning roller.

[0083] In this sixth embodiment, the downward-sloping extension of the liquid flow contraction section allows the cleaning fluid to flow from the storage tank to the liquid flow contraction section during the self-cleaning process. When the scraper is in the first position and the liquid supply unit sprays liquid to accumulate cleaning fluid in the storage tank, the cleaning fluid flows from the storage tank to the liquid flow contraction section during the reverse rotation of the cleaning roller. Due to the inclined design of the liquid flow contraction section, the cleaning fluid not only flows under the influence of the cleaning roller's movement but also flows from the end closer to the storage tank to the end farther away from the storage tank under its own gravity. This effectively washes the roller brush cover, improving the cleaning effect. Furthermore, the inclined design of the liquid flow contraction section increases the flow velocity of the cleaning fluid as it passes through the contraction section, forming a high-speed liquid flow. This more effectively washes away dirt on the roller brush cover, improving the cleaning effect and efficiency.

[0084] This sixth embodiment can be implemented using any of the following examples:

[0085] Example 1: such as Figure 3 and Figure 4 As shown, the cleaning roller 1 includes a first roller brush 101 and a second roller brush 102 arranged front to back, and a cleaning element surrounding the outside of the first roller brush 101 and the second roller brush 102. The outer diameter of the first roller brush 101 is smaller than the outer diameter of the second roller brush 102. The roller brush cover 2 extends downward at an angle from the side near the liquid storage tank 3 to the side away from the liquid storage tank 3, so that the liquid flow contraction section 5 extends downward at an angle from the side connected to the liquid storage tank 3 to the side away from the liquid storage tank 3, and the cross-sectional area of ​​the liquid flow contraction section 5 is the same size from the side connected to the liquid storage tank 3 to the side away from the liquid storage tank 3. This arrangement allows the liquid flow to maintain a stable flow velocity when flowing through the liquid flow contraction section 5, reducing the probability of disturbance.

[0086] Example 2: This example 2 is not illustrated. In this example 2, the cleaning roller includes a first roller brush, a second roller brush arranged front to back, and a cleaning cloth wrapped around the outside of the first and second roller brushes. The outer diameter of the first roller brush is smaller than that of the second roller brush. The roller brush cover extends horizontally from the side near the liquid storage tank to the side away from the liquid storage tank. The liquid flow contraction section extends downward at an angle from the side connected to the liquid storage tank to the side away from the liquid storage tank. The cross-sectional area of ​​the liquid flow contraction section gradually increases from the side connected to the liquid storage tank to the side away from the liquid storage tank, so that the liquid flow velocity gradually decreases from the side connected to the liquid storage tank to the side away from the liquid storage tank. On the one hand, the change in flow velocity can intensify the flushing effect of the liquid flow on the joint between the liquid supply component and the roller brush cover, avoiding the accumulation of dirt at this location. On the other hand, the slowing down of the liquid flow velocity can enhance the wetting and softening effect of the liquid flow on the roller brush cover, resulting in a better cleaning effect on stubborn stains on the roller brush cover.

[0087] Compared to existing technologies where the scraper is fixed to abut against the cleaning roller or where the scraper moves in the front-to-back direction to abut or disengage from the cleaning roller 1, in this application, the scraper 7 needs to rotate relative to the liquid supply 6 to abut or disengage from the cleaning roller 1. Therefore, sufficient space needs to be left between the cleaning roller 1 and the floor brush housing 11 for the scraper 7 to move. This space also forms the basis for the existence of the liquid storage tank 3. As a preferred embodiment of this application, such as Figure 3 and Figure 4As shown, the liquid storage tank 3 forms a movement space for the scraper 7 to rotate. The cleaning assembly also includes a rotating member 12 located around the liquid supply member 6. The scraper 7 is located on the upper surface of the rotating member 12, so that the rotating member 12 drives the scraper 7 to rotate around the liquid supply member 6 in the movement space. In this embodiment, the liquid storage tank 3 forms a movement space for the scraper 7 to rotate, which satisfies both the movement requirements of the scraper 7 and the liquid storage space requirements during the self-cleaning operation. Furthermore, in this embodiment, the scraping element 7 is positioned on the upper end face of the rotating element 12 and rotates around the liquid supply element 6. This effectively utilizes the space within the liquid storage tank 3. When the scraping element 7 contacts the cleaning roller 1, there is sufficient distance between the cleaning roller 1 and the front surface of the liquid supply element 6. This allows the liquid flowing from the liquid supply port of the liquid supply element 6 to accumulate in the liquid storage tank 3 and be absorbed by the bristles on the cleaning roller 1, wetting the bristles for better cleaning and / or dissolving of stains. Simultaneously, the cleaning roller 1 reverses direction, and the scraping element 7 squeezes and scrapes the wastewater or dirt on the bristles of the cleaning roller 1. Due to the liquid storage tank 3... With sufficient space, the liquid flow can be further mixed and accumulated in the liquid storage tank 3, thereby forming a continuous liquid flow to wash the front surface of the liquid supply component 6 and the roller brush cover 2, etc. After the liquid flow collides with the roller brush cover 2 and the front surface of the liquid supply component 6, it is deflected and flows back to the cleaning roller 1, thereby washing the cleaning roller 1. Therefore, the existence of the movement space not only realizes the position switching of the scraping component 7, but also realizes the formation of the liquid storage tank 3 and the opening of the upper suction channel. The arrangement of this technical solution makes the structure of the cleaning component more compact and reasonable, which facilitates the overall layout and installation of the surface cleaning device.

[0088] The arrangement of the rotating component 12 surrounding the liquid supply component 6 provides a corresponding transmission for the surface cleaning device to drive the scraping component 7 to rotate relative to the liquid supply component 6. However, it also creates a dynamic gap between the liquid supply component 6 and the scraping component 7. Whether during cleaning operations or self-cleaning operations, this dynamic gap provides a channel for dirt and liquid to enter the interior of the floor brush housing 11. To prevent dirt and liquid from entering the interior of the floor brush housing 11 through this dynamic gap, as a preferred example in this embodiment, such as... Figure 3 and Figure 4As shown, the scraper 7 is equipped with a dynamic seal 8. The dynamic seal 8 rotates with the scraper 7 to seal the dynamic gap between the scraper 7 and the liquid supply component 6 and wipes the front surface of the liquid supply component 6. The upper surface of the dynamic seal 8 at least partially covers the scraper 7 to cooperate with the scraper 7 to form the bottom of the liquid storage tank 3. In this example, the dynamic seal 8 on the scraper 7 ensures that, whether during cleaning operations or self-cleaning operations, the cleaning liquid sprayed from the liquid supply component 6 or the dirt splashed off by the cleaning roller 1 is difficult to enter the interior of the floor brush housing 11 through the dynamic gap between the liquid supply component 6 and the scraper 7. This effectively protects the electronic components inside the floor brush housing 11 and ensures the stability and reliability of the surface cleaning device. In addition, the dynamic seal 8 can wipe the front surface of the liquid supply component 6 during the rotation of the scraper 7, further improving the cleaning effect of the liquid supply component 6, especially the cleaning effect on stubborn stains attached to the front surface of the liquid supply component 6. Compared to the technical solution that only clamps the dynamic seal 8 between the liquid supply component 6 and the scraper 7, in this example, the upper surface of the dynamic seal 8 at least covers the scraper 7, thus forming a tight fit with the scraper 7. On the one hand, this can more comprehensively seal the bottom area of ​​the liquid storage tank 3, further reducing the probability of liquid leakage from the liquid storage tank 3 to the dynamic gap. On the other hand, during the rotation of the scraper 7, the wiping of the liquid supply component 6 by the dynamic seal 8 will generate a reverse force on the dynamic seal 8. A part of the dynamic seal 8 extends above the scraper 7, and this part of the area will exert a pulling effect on the entire dynamic seal 8, so that the dynamic seal 8 and the scraper 7 can maintain a better sealing effect. This reduces the probability of the dynamic seal 8 being deformed by force and also reduces the probability of liquid in the liquid storage tank 3 penetrating into the space between the scraper 7 and the liquid supply component 6 through the joint between the dynamic seal 8 and the scraper 7, further ensuring the sealing performance.

[0089] As a preferred example of this implementation, such as Figure 3 and Figure 4As shown, the liquid supply component 6 has an arc-shaped liquid supply surface 65 and a guide arc surface 62 externally tangent to the liquid supply surface 65. The scraping component 7 includes a scraper 71 extending toward the cleaning roller 1. The scraper 71 includes a connected scraping section 711 and a guide section 712. The guide section 712 slides along the guide arc surface 62. A dynamic seal 8 is located between the guide section 712 and the guide arc surface 62. The dynamic seal 8 rotates with the scraping component 7 to wipe the liquid supply component 6. In this example, the guide section 712 can guide the movement of the scraping component 7, thereby improving the reliability and stability of the rotational movement of the scraping component 7. Furthermore, the scraping component 7 rotates along the guide arc surface 62, minimizing the reaction force of the guide arc surface 62 on the scraping component 7. This results in a smaller impact on the power component that drives the scraping component 7. In particular, when the scraping component 7 changes its rotation direction, the power component operates smoothly, preventing vibration or jumping of the floor brush housing 11 due to jumping of the power component. This would not affect the self-cleaning operation or even cause unstable rotational connection between the floor brush and the cleaning roller 1, leading to overload of the drive motor of the cleaning roller 1 and affecting the service life of the motor.

[0090] This embodiment does not limit the connection method between the scraper 71 and the dynamic seal 8. In one example, the scraper 71 and the dynamic seal 8 are connected by screws. In another example, the dynamic seal 8 is glued to the scraper 71. In yet another example, the scraper 71 and the dynamic seal 8 are formed by two-material injection molding.

[0091] Example 2:

[0092] The structure and principle of this embodiment 2 are basically the same as those of embodiment 1, except that:

[0093] like Figure 5 As shown, in this embodiment, the water tank of the surface device is mounted on the floor brush housing 11. The water tank includes a tank body and a water tank cover fastened to the tank body. The bottom wall of the tank body forms a roller brush cover 2. In other words, in this embodiment, a liquid flow contraction section 5 communicating with the liquid storage tank 3 is formed between the bottom wall of the tank body and the outer surface of the cleaning roller 1.

[0094] like Figures 5 to 7 As shown, the lower front side of the liquid supply component 6 is provided with a guide groove 64 located above the scraper 7 and opening downwards. The dynamic seal 8 includes a screw-in and screw-out portion 81 that rotates along the guide groove 64 and abuts against and seals with the liquid supply component 6. The scraper 7 is in a second position, and a portion of the screw-in and screw-out portion 81 is screwed out from the guide groove 64. The front surface of the screw-out portion 81 and the upper surface of the scraper 7 cooperate to form a flushing and drainage surface.

[0095] In this embodiment 2, the lower guide groove 64 on the front side of the liquid supply component 6 and the screw-in / screw-out part 81 on the dynamic seal 8 provide guidance for the rotational movement of the scraper 7, making the rotational movement of the scraper 7 more stable. The guide groove 64 opens downwards, making it difficult for either the cleaning liquid accumulated in the liquid storage tank 3 or the cleaning liquid splashed out during the operation of the cleaning roller 1 to enter the guide groove 64, thereby reducing the probability of cleaning liquid and dirt entering the brush housing 11 through the dynamic gap between the liquid supply component 6 and the scraper 7. Figure 6 As shown, when the scraper 7 is in the second position, a portion of the screw-in / screw-out part 81 screws out from the guide groove 64, while the remaining portion remains within the guide groove 64. This prevents the dynamic seal 8 from completely detaching from the guide groove 64. When the scraper 7 switches from the second position to the first position, the screw-in / screw-out part 81 can easily continue sliding along the guide groove 64 without needing to reposition itself, ensuring the stability of the dynamic seal 8's position. Furthermore, when the scraper 7 is in the second position, the front surface of the screw-out part 81 and the upper surface of the scraper 7 can cooperate to form a flushing and guiding surface. When the suction motor is running, as the sewage in the storage tank 3 flows through the upper suction channel 10 to the suction port 9, the presence of the flushing and guiding surface guides the sewage to flush the front surface of the screw-out part 81 and the upper surface of the scraper 7, reducing the amount of dirt adhering to both surfaces and improving the cleaning effect.

[0096] As a preferred embodiment of this Example 2, such as Figure 6 As shown, the dynamic seal 8 also includes a body portion connected to the screw-in / screw-out portion 81. The body portion includes a sealing portion 83 that abuts against and seals the upper surface of the scraper 7, and a positioning portion 82 located between the scraper 7 and the liquid supply component 6. By setting the sealing portion 83 on the upper surface of the scraper 7 and cooperating with the screw-in / screw-out portion 81, a larger area of ​​coverage can be formed for the dynamic gap between the scraper 7 and the liquid supply component 6, thereby further improving the sealing effect. When the scraper 7 is in the first position, the upper surface of the sealing portion 83 and a portion of the upper surface of the scraper 7 cooperate to form part of the bottom of the liquid storage tank 3, so that the upper surface of the scraper 7 and the upper surface of the sealing portion 83 can be immersed in the liquid storage tank 3. When dirt adheres to both, it is convenient to soften and clean the dirt on both.

[0097] Furthermore, such as Figure 7 As shown, the angle between the sealing part 83 and the screw-in / screw-out part 81 is an obtuse angle, which avoids the formation of a cleaning dead angle between the sealing part 83 and the screw-in / screw-out part 81. When the scraper 7 is in the second position, the liquid in the liquid storage tank 3 flows down to flush the angle between the sealing part 83 and the screw-in / screw-out part 81, preventing the accumulation of dirt in this area.

[0098] As a preferred embodiment of this Example 2, such as Figure 6 and Figure 7 As shown, the liquid supply component 6 is provided with a scraper 63 located in front of the screw-in / screw-out portion 81. The scraper 63 and the liquid supply component 6 cooperate to form a guide groove 64. The end of the scraper 63 abuts against the screw-in / screw-out portion 81 to wipe the front surface of the screw-in / screw-out portion 81. In this embodiment, the scraper 63 is provided in front of the liquid supply component 6, and the guide groove 64 is formed by the scraper 63 and the liquid supply component 6, which simplifies the structural design of the liquid supply component 6 and reduces the processing difficulty of the liquid supply component 6. When the scraper 7 is in the second position, a portion of the screw-in / screw-out section 81 is screwed out from the guide groove 64 and exposed to the upper suction channel 10. Since some dirt and liquid may adhere to the front surface of the screw-out section 81, when the scraper 7 switches from the second position to the first position, it drives the screw-in / screw-out section 81 to rotate synchronously. The end of the scraper 63 wipes the front surface of the screw-in / screw-out section 81, which can effectively clean the front surface of the screw-in / screw-out section 81 and prevent dirt and liquid from entering the guide groove 64 with the screw-in / screw-out section 81. This further reduces the probability that dirt and liquid will enter the floor brush housing 11 through the dynamic gap between the scraper 7 and the liquid supply 6.

[0099] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0100] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0101] The above descriptions are merely embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. A surface cleaning device, comprising a floor brush housing, a cleaning assembly disposed on the floor brush housing, and a roller brush cover located above the cleaning assembly, the cleaning assembly including a cleaning roller, the floor brush housing having a scraping element that movably abuts against the cleaning roller, a liquid supply element located above the scraping element, and a suction port located below the scraping element, characterized in that, The scraper is rotatable relative to the liquid supply component, so that the scraper has a first position that abuts against the cleaning roller and a second position that disengages from the cleaning roller. The liquid supply component has a liquid supply surface. In the first position, the scraper, the liquid supply surface, and the outer surface of the cleaning roller cooperate to form a liquid storage tank.

2. The surface cleaning device according to claim 1, characterized in that, The scraping component includes a scraper extending toward the cleaning roller, the scraper being located at the lower part of the front side of the liquid supply component, the scraping component being in the first position, and the upper surface of the scraper forming part of the bottom of the liquid storage tank.

3. The surface cleaning device according to claim 1, characterized in that, When the scraper is in the second position, the liquid storage tank is opened to form an upper suction channel between the outer surfaces of the scraper and the cleaning roller, connecting the liquid storage tank and the suction port. The dirt and / or liquid in the liquid storage tank are drawn away and collected by the suction port.

4. The surface cleaning device according to claim 1, characterized in that, The distance D1 between the liquid supply component and the outer surface of the cleaning roller is greater than the distance D2 between the roller brush cover and the outer surface of the cleaning roller, so as to form a liquid flow contraction section communicating with the liquid storage tank between the roller brush cover and the outer surface of the cleaning roller.

5. A surface cleaning device according to claim 4, characterized in that, The roller brush cover has a transition portion that abuts against the top of the liquid supply component, the transition portion being located above the highest point of the cleaning roller.

6. A surface cleaning device according to claim 5, characterized in that, The outer surfaces of the transition section, the liquid supply component, and the cleaning roller cooperate to form a transition section that connects the liquid storage tank and the liquid flow contraction section. The upper part of the liquid supply component is arc-shaped to form a first guide surface extending into the transition section, and the cleaning roller has a second guide surface extending into the transition section.

7. A surface cleaning device according to claim 4, characterized in that, The liquid flow contraction section extends downward at an angle from the side connected to the liquid storage tank to the side away from the liquid storage tank, so as to form a flushing channel between the roller brush cover and the cleaning roller.

8. A surface cleaning device according to claim 1, characterized in that, The liquid storage tank forms a movement space for the scraper to rotate. The cleaning assembly also includes a rotating component located around the liquid supply component. The scraper is located on the upper end face of the rotating component, so that the rotating component drives the scraper to rotate around the liquid supply component in the movement space.

9. A surface cleaning device according to claim 8, characterized in that, The scraper is provided with a dynamic seal, which rotates with the scraper to seal the dynamic gap between the scraper and the liquid supply component and wipe the front surface of the liquid supply component. The upper surface of the dynamic seal at least partially covers the scraper to form the bottom of the liquid storage tank in cooperation with the scraper.

10. A surface cleaning device according to claim 9, characterized in that, The lower front part of the liquid supply component is provided with a guide groove located above the scraper and opening downwards. The dynamic seal includes a screw-in and screw-out portion that rotates along the guide groove and abuts against and seals with the liquid supply component. The scraper is in the second position, and a portion of the screw-in and screw-out portion rotates out from the guide groove. The front surface of the screw-out portion of the screw-in and screw-out portion cooperates with the upper surface of the scraper to form a flushing and drainage surface.

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