Surface cleaning apparatus with improved dirt pick-up

Abstract

This invention discloses a surface cleaning device with good dirt suction effect, including a floor brush with a cleaning component installed. The housing of the floor brush is provided with a liquid distribution component, a dirt scraping component located behind the cleaning component, a dirt suction port, and a driving device. The dirt scraping component includes a dirt scraping part. The driving device drives the dirt scraping part to move through a rotating component. The dirt scraping component and the housing of the floor brush cooperate to form a dirt suction chamber located upstream of the dirt suction port. The dirt scraping component forms part of the cavity wall of the dirt suction chamber. The dirt scraping part has a first position that abuts against the cleaning component and a second position that is detached from the cleaning component and at least partially blocks the dirt suction port. The driving device drives the rotating component to rotate, causing the dirt scraping part to switch between the first position and the second position, thereby changing the effective ventilation area of ​​the dirt suction chamber. With the working power of the dirt suction fan remaining unchanged, the suction force in the dirt suction chamber is changed, thereby changing the dirt suction effect, especially for loose and large dirt clumps such as hair that enter the dirt suction chamber, which has a better collection effect.

Description

Technical Field

[0001] This invention relates to the field of cleaning equipment technology, and more particularly to a surface cleaning device. Background Technology

[0002] In recent years, cleaning equipment has been increasingly widely used in people's daily lives, bringing great convenience and improving their living experience. Existing handheld surface cleaners generally include a floor brush, a water supply unit, and a dirt collection unit. The floor brush contains a cleaning component driven by a motor and transmission structure, as well as a scraper for wiping the cleaning component. The suction port is usually located on the front side wall of the floor brush housing. The cleaning component is mounted on the floor brush housing and located in front of the suction port. A scraper strip is also located at the bottom of the front side of the floor brush housing. The scraper strip is located above the suction port and abuts against the cleaning component. The scraper strip, the floor brush housing, and the scraper strip form a suction chamber located in front of the suction port. The water supply unit supplies water to the cleaning component, allowing it to absorb water and wet-wipe the surface to be cleaned. The dirt collection unit collects dirt from the surface to be cleaned, as well as dirt scraped off by the scraper strip after the cleaning component has wiped the surface, into a collection bucket through the suction chamber and suction port.

[0003] During household cleaning, sometimes large particles of dirt or puddles of water are accidentally spilled on the floor. People usually want a floor scrubber to handle these effectively, which naturally requires a sufficiently large suction port to ensure that large particles of dirt are sucked up from the surface to be cleaned. To address this, the applicant has improved the suction port. Patent application number 202320066523.0, entitled "A Surface Cleaning Device with Good Suction Effect," discloses a technical solution where "the front end of the suspended part that contacts the cleaning component is not higher than the inner fixed point of the suction port, and the maximum inner height h of the suction port satisfies 20mm≤h≤30mm." This aims to increase the suction strength at the suction port, thereby improving the suction effect when the cleaning component performs self-cleaning. While this technical solution is effective for handling large particles of dirt, the inlet is fixed. Although the airflow changes as it passes the scraper, the scraper itself remains constant, meaning the area of ​​the suction chamber remains unchanged. Furthermore, because the scraper must contact the cleaning component, it cannot extend too far downwards to ensure sufficient scraping force while minimizing resistance to the drive motor's rotation. Therefore, the suction force changes only slightly at the inlet of the suction chamber as it passes the scraper, returning to a constant state once it reaches the inlet. We found that this solution offers limited improvement in suction force during the self-cleaning of the cleaning component. Additionally, because the scraper remains stationary, dirt on its back side cannot be effectively cleaned.

[0004] To address this technical issue, the applicant continued research and, in patent application number 202422496894.X entitled "A Cleaning Machine with a Rotating Component," disclosed a method of installing a rotating component on the floor brush that rotates relative to the brush housing. This allows the scraper to have both a scraping position that contacts the cleaning component and a separation position that separates it from the cleaning component. This facilitates the suction of dirt from the scraper into the suction port, eliminating the need for manual cleaning by the user and achieving self-cleaning of dirt on the back of the scraper. In this solution, the scraper can move between the contact and separation positions with the cleaning component. When the scraper is in the separation position, dirt on the back of the scraper can flow out from the gap between the scraper and the cleaning component and be drawn into the suction port by the suction force of the suction fan. Furthermore, by rotating the cleaning component, the applicant can detach hair entangled on it, effectively untangling hair from the cleaning component. However, to ensure the smooth movement of the scraper driven by the rotating assembly, maintain the sealing effect of the floor brush to prevent dirt from entering, and avoid increasing the size of the floor brush, the aforementioned technical solution places the scraper above the suction port and rotates along the top wall of the suction port. We found that lighter dirt such as hair, after being detached from the cleaning component, easily forms long or large clumps with many compressible spaces inside, along with dust and other dirt. Due to the large size or length of these clumps and their large internal gaps, they still easily accumulate on the wall of the floor brush housing in front of the suction port, making it difficult for them to enter the suction port. Therefore, even after the self-cleaning process is completed, soft objects such as hair will still accumulate in the suction port, requiring manual cleaning by the customer. In addition, even when the suction fan operates at its highest power, some sand, clay, and other similar objects become heavier when wetted and are unable to enter the suction port, accumulating in front of the suction port or adhering to the wall of the floor brush housing near the suction port, requiring manual cleaning again and resulting in a poor customer experience. Since the maximum power of the vacuum cleaner is fixed, the suction power during cleaning will only change up to the maximum power of the vacuum cleaner. However, if the vacuum cleaner operates at maximum power for a long time, it will consume more electricity and reduce the efficiency of the motor, resulting in decreased performance and an inability to achieve good suction results during self-cleaning. If a high-power vacuum cleaner is used, it will be like using a large engine for a small task, resulting in wasted energy. In addition, it will increase the size and weight of the floor scrubber, making it more difficult for customers to push and pull the machine, thus reducing its portability. Summary of the Invention

[0005] The purpose of this application is to provide a surface cleaning device with good suction effect, so as to solve the technical problem that when the power of the suction fan is constant and the scraping part is fixed, the suction force is fixed, which makes it difficult for softer hair and lighter entangled objects or heavier objects such as clay and sand to enter the suction port and tend to accumulate near the suction port.

[0006] To achieve the above-mentioned technical objectives, the present invention provides a surface cleaning device with good suction effect, including a floor brush with a cleaning component. The housing of the floor brush is provided with a liquid distribution component, a scraping component located behind the cleaning component, a suction port, and a driving device. The scraping component includes a scraping part. The driving device drives the scraping part to move through a rotating component. The scraping component and the housing of the floor brush cooperate to form a suction chamber located upstream of the suction port. The scraping component forms part of the cavity wall of the suction chamber. The scraping part has a first position that abuts against the cleaning component and a second position that is detached from the cleaning component and at least partially blocks the suction port. The driving device drives the rotating component to rotate, causing the scraping part to switch between the first position and the second position, thereby changing the effective ventilation area of ​​the suction chamber.

[0007] Furthermore, the housing of the floor brush includes a lower housing, a suction port located in the middle region of the lower housing, a scraping assembly located above the suction port and mounted on the front side of the lower housing, such that the scraping assembly forms part of the upper cavity wall of the suction chamber, the suction port forms the rear port of the suction chamber, the scraping part moves from a first position to a second position, and the scraping part at least partially covers the front port of the suction chamber, thereby changing the effective ventilation area of ​​the suction chamber.

[0008] Furthermore, the smearing assembly also includes a first flexible connector, one end of which is connected to the smearing part, and the other end of which is connected to the housing of the floor brush. The first flexible connector forms part of the upper cavity wall of the suction chamber.

[0009] Furthermore, by controlling the scraper to move from the first position to the second position, the first flexible connector is squeezed and deformed, thereby changing the effective ventilation area of ​​the suction chamber.

[0010] Furthermore, the first flexible connector bends downward and deforms, and the lowest end of the first flexible connector is lower than the lower end of the scraping part, so that part of the first flexible connector is located inside the suction chamber and blocks the suction port, thereby reducing the ventilation area of ​​the suction chamber.

[0011] Furthermore, the first flexible connector bends and deforms upwards, the lower end of the scraping part is lower than the lowest end of the first flexible connector, and the scraping part at least partially blocks the front port of the suction chamber, thereby reducing the ventilation area of ​​the front port of the suction chamber.

[0012] Furthermore, the lower end of the front sidewall of the lower housing is provided with a bottom edge extending forward. The lower housing also includes a left baffle and a right baffle located at both ends of the bottom edge and perpendicularly connected to the bottom edge. The front sidewall of the lower housing is inclined towards the suction port from the left baffle and the right baffle respectively. The scraping assembly, the bottom edge, the ground scraper strip located at the front end of the bottom edge, the front sidewall, the left baffle and the right baffle form a suction chamber.

[0013] Furthermore, the front sidewall of the lower housing slopes longitudinally from bottom to top and backward, so that the suction chamber is funnel-shaped with a larger front port and a smaller rear port.

[0014] Furthermore, the floor brush housing is provided with a mounting groove, and a rotating component is disposed in the mounting groove. The rotating component includes a shaft core, a liquid distributing component, and a smearing assembly located at the opening. At least a portion of the smearing assembly extends forward from the opening of the mounting groove. The liquid distributing component is located on the front side of the shaft core and above the smearing assembly. The smearing assembly is connected to the lower end of the shaft core. The rotating component drives the smearing assembly to switch between a first position and a second position. The other end of the first flexible connector is sealed to the lower wall of the mounting groove to form a sealed cavity that covers the rotating component.

[0015] Furthermore, a second flexible connector is provided between the liquid dispensing component and the scraping part. The rotating component drives the scraping part to switch between the first position and the second position. The second flexible connector is driven by the scraping part to squeeze forward and contract or stretch backward, so that the rotation gap between the liquid dispensing component and the scraping part is covered by the second flexible connector.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] The surface cleaning device provided by this invention forms a suction chamber upstream of the suction port by cooperating with a scraping component and the housing of a floor brush. The scraping component forms part of the cavity wall of the suction chamber. The scraping component includes a scraping part, which has a first position that abuts against the cleaning component and a second position that disengages from the cleaning component. A driving device drives a rotating component to rotate, causing the scraping part to switch between the first and second positions. This causes the end of the scraping part to gradually form an operating trajectory extending from a position flush with the top wall of the suction port to a position lower than the top wall of the suction port. When the scraping part switches to the second position, i.e., the end of the scraping part is at a position lower than the top wall of the suction port, the scraping part at least partially covers the suction port. Since the scraping component forms part of the cavity wall of the suction chamber, the scraping part moves towards the suction port... During operation, the cross-sectional area of ​​the suction chamber wall decreases until it reaches the second position. This changes the effective ventilation area of ​​the suction chamber, altering the suction force while keeping the suction fan's power constant. The smaller cross-sectional area of ​​the suction chamber wall results in a stronger suction force, allowing dirt entering the suction chamber to be collected more effectively into the suction port. This is particularly effective for collecting loose, large clumps of dirt, such as hair, as the airflow compresses and deforms these clumps, causing them to bind more tightly with heavier dirt or reduce their size. This allows them to enter the suction port more smoothly without clogging it due to their large size, thus significantly improving the surface cleaning equipment's suction efficiency. Furthermore, since the scraping assembly forms part of the wall of the suction chamber, when the scraping part comes into contact with the cleaning component, the front end of the suction chamber is seamlessly connected to the cleaning component. This allows the dirt or debris scraped off the cleaning component by the scraping part to directly enter the suction chamber. As the scraping part transitions from the first position to the second position, under the guidance of the scraping part's movement and the centrifugal force of the cleaning component, the dirt or debris entering the suction chamber is also conveyed from the suction chamber to the suction port, forming a suction effect. The tendency of the suction chamber to transport dirt or liquid towards the suction port is such that when the scraping part moves to the second position, the effective ventilation area of ​​the suction chamber decreases, resulting in increased suction force. Under the action of the further increased suction force, the dirt and / or liquid transported from the suction chamber to the vicinity of the suction port are smoothly sucked into the suction port, thereby ensuring that the dirt scraped off from the cleaning part can be better collected and will not accumulate in the roller brush chamber, especially at the suction port. This greatly improves the dirt suction effect of the surface cleaning equipment and thus greatly enhances the self-cleaning effect of the cleaning part. Attached Figure Description

[0018] Figure 1 This is one embodiment of the surface cleaning device described in this invention;

[0019] Figure 2 This is an exploded view of the floor brush in Example 1;

[0020] Figure 3 This is a cross-sectional view of the floor brush placed on the base and the scraping part in the first position in Embodiment 1;

[0021] Figure 4 This is a cross-sectional view of the floor brush placed on the base and the scraping part in the second position in Embodiment 1;

[0022] Figure 5 for Figure 3 Enlarged view of point A in the middle;

[0023] Figure 6 for Figure 4 Enlarged view of point B in the middle;

[0024] Figure 7 A schematic diagram showing the changes in the suction chamber when the scraper is in the first and second positions;

[0025] Figure 8 This is a schematic diagram of the lower housing of the floor brush in Embodiment 1;

[0026] Figure 9 This is a partial structural diagram of the sludge scraping component, liquid dispensing component, and rotating component in Embodiment 1, with the sludge scraping part in the first position.

[0027] Figure 10 A schematic diagram of the floor brush when the smearing assembly is in the first position;

[0028] Figure 11 This is a schematic diagram of the floor brush when the scraping assembly is in the second position.

[0029] Figure 12 This is a schematic diagram of the floor brush in the first position as described in Embodiment 2;

[0030] Figure 13 This is a schematic diagram of the floor brush in the second embodiment when the scraping part is in the second position;

[0031] Figure 14 This is a cross-sectional view of the sludge scraping assembly, liquid dispensing component, and rotating component in Embodiment 2, with the sludge scraping part in the first position.

[0032] Figure 15 This is a cross-sectional view of the sludge scraping assembly combined with the liquid dispensing component and the rotating component in Embodiment 2, with the sludge scraping part in the second position.

[0033] Figure 16 This is a partial sectional view of the floor brush placed on the base in Example 2;

[0034] Figure 17 This is a schematic diagram of a surface cleaning device that is a cleaning robot;

[0035] Figure 18 for Figure 17 A cross-sectional view of the cleaning robot's scraping section in the first position;

[0036] Figure 19 for Figure 17 A cross-sectional view of the cleaning robot's scraping section in the second position.

[0037] The components in the diagram are labeled as follows:

[0038] 1-Fuselage;

[0039] 2-Floor brush; 20-Roller brush cavity; 21-Upper housing; 211-Extension; 213-Spring; 220-Transfer cavity; 22-Lower housing; 221-Front side wall; 222-Left baffle wall; 223-Right baffle wall; 224-Bottom edge; 230-Receiving cavity; 23-Floor scraper blade; 240-Suction chamber; 2401-Rear cavity wall; 24-Suction port; 25-Scraping part; 251-Metal scraper blade; 252 - Comb teeth; 2521- Comb teeth; 253- Fixed connector; 26- Dispensing component; 261- Liquid supply port; 262- Dispensing surface; 263- Water inlet; 27- Frame-type mounting groove; 271- Upper groove wall; 272- Lower groove wall; 273- Groove opening; 28- Roller; 29- Rotating component; 291- Shaft core; 292- Rotating plate; 293- Shaft core; 294- Arc-shaped surface; 295- Front surface;

[0040] 31-Sewage container; 32-Vacuum blower;

[0041] 4-First flexible connector / second flexible connector; 41-Flexible body; 42-First fixed connection end; 43-Second fixed connection end; 40-Fixed component; 45-Opening;

[0042] 5 - Drive motor; 52 - Worm gear;

[0043] 6-Cleaning component; 61-Roller; 62-Brush cloth; 63-Side plate;

[0044] 7-Clear water tank;

[0045] 8-Base; 81-Tray; 811-Washing tank; 812-Front baffle; 813-Air duct; 82-Bottom shell; 83-Heat-conducting component; 84-Heating component; 841-Heating surface; 85-Fan; 86-Shielding component;

[0046] 9 - Liquid storage gap; 90 - Represents dirt and liquid particles or clumps. Detailed Implementation

[0047] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the terms "upper," "lower," "left," "right," "longitudinal," "lateral," "inner," "outer," "vertical," "horizontal," "top," and "bottom," etc., which indicate orientation or positional relationships, are based solely on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device / component referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0048] In this invention, when we stand on the right side of the surface cleaning device and observe, as... Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 12 , Figure 13 and Figure 16 As shown, we see that the cleaning component rotates clockwise. We define the direction in which the cleaning component moves clockwise from inside the brush cavity to outside the brush cavity as forward rotation. We define the direction in which the cleaning component moves counterclockwise inside the brush cavity as reverse rotation.

[0049] This invention does not limit the surface cleaning device; it can be a floor scrubber or a cleaning robot. When the surface cleaning device is a floor scrubber with a body hinged to a floor brush, it includes a power system comprising a battery pack and a vacuum fan. The power system can be housed within the body or include a housing with a handle. The battery pack and vacuum fan are housed within the housing, forming an independent power component. Installing the power system on the upper part of the body provides power to the surface cleaning system. Combining the power system with a dust cup and a suction cylinder forms a vacuum cleaner. Combining the independent power system with a fabric cleaning head having a wastewater tank and a clean water tank forms a fabric cleaning machine. Combining the power system with a mite removal head and a dust cup forms a mite removal device. Of course, it is understandable that the suction motor can be set as a vacuum motor mounted on the machine body; the scraping part on the floor brush can include a metal scraper, or a comb with multiple teeth, or a scraper and a comb below the scraper; the clean water tank and / or water pump can be set on the machine body or on the floor brush; the cleaning component can be a single-roller cleaning component, that is, including a roller and a cleaning cloth sleeved on the roller, the cleaning cloth having bristles; or it can be a tracked cleaning component, that is, including a drive roller, a driven roller, a support frame located between the driven roller and the drive roller for mounting and connecting the two, and a cleaning cloth sleeved on the driven roller and the drive roller; such variations of the surface cleaning device that do not depart from the concept of the present invention are all within the protection scope of the present invention, and will not be listed here one by one.

[0050] Example 1

[0051] As a surface cleaning device with good cleaning effect as described in this invention, such as Figures 1 to 11As shown, the system includes a surface cleaning device and a base station 8. In this embodiment, the surface cleaning device is a floor scrubber. The surface cleaning device includes a floor brush 2 with a roller brush cavity 28 on the front side, a body 1 hinged to the floor brush 2, a liquid supply system, and a suction system. The floor brush 2 has a liquid distribution component 26, a scraping component located behind the cleaning component 6, a suction port 24, and a driving device (not shown in the figure) on its housing. The scraping component includes a scraping part 25, and the driving device drives the scraping part to move through a rotating component 29. The floor brush 2 has an upper housing 21 and a lower housing 22. The upper housing 21 is fastened to the lower housing 22 to form a receiving cavity 230. The bottom of the floor brush 2 is provided with rollers 28 for auxiliary cleaning. To assist the back-and-forth movement of the floor brush, a water pump is installed in the receiving cavity 23, and a cleaning component 6 is installed in the roller brush cavity 20. A drive motor 5 is rotatably connected to the side wall of the roller brush cavity 20 at one end. In this embodiment, the cleaning component 6 is a cleaning roller with a hollow roller 61. A cleaning cloth 62 is provided on the outer surface of the roller 61, and bristles are provided on the cleaning cloth 62. The drive motor that drives the cleaning component 6 to rotate is installed in the hollow roller 61. A side plate 63 is provided at one end of the roller 61 of the cleaning component 6, and the other end of the roller 61 of the cleaning component is sleeved on the outside of the drive motor 5. The side plate 63 is installed on one side of the floor brush housing, so the cleaning component 6 is installed on the floor brush through the side plate 63. The front sidewall 221 of the lower housing 22 is provided with a suction port 24, a scraping part 25, and a liquid supply port 261 from bottom to top. The center of the receiving cavity 23 is provided with a suction channel connecting the suction port 24 and the sludge container 31. The suction system includes a suction motor, a sludge container 31, and a suction channel for transporting the sewage or waste sucked in from the suction port 24 into the sludge container 31. The suction channel includes a suction hose 33, a suction pipe (not shown in the figure) located at the lower end of the machine body, and a suction pipe located on the sludge container 31. An adapter pipe is provided between the suction hose 33 and the suction port 24 to connect the two. The waste collection tank 3 is detachably mounted on the body 1. A suction pipe is installed inside the waste collection tank 31, located at the bottom and extending upwards. A transition cavity 220 is located at the center of the rear side of the floor brush 2. The suction hose 33 extends upwards through the transition cavity 220 and connects to the suction pipe at the lower end of the body 1. The suction pipe at the lower end of the body 1 connects to the suction pipe on the waste collection tank 31, allowing waste liquid or debris to smoothly pass through the transition pipe, suction hose 33, suction pipe, and suction tube after entering the suction port 24, and then flow out from the suction tube into the waste collection tank 31. The scraping assembly cooperates with the housing of the floor brush 2 to form a suction chamber 240 located upstream of the suction port 24, with the scraping assembly forming part of the chamber wall of the suction chamber 240. The liquid supply system includes a clean water tank 4, a water pump, a liquid distributor 26, and a liquid supply pipeline connecting the water pump and the liquid distributor 26.In this embodiment, the clean water tank is located on the upper housing 21 of the floor brush 2, the suction motor is a vacuum motor 32, the vacuum motor 32 is located inside the body 1, the scraping part 25 includes a metal scraper 251 and a comb tooth 252, the scraping part 25 has a first position that abuts against the cleaning part 6 and a second position that is detached from the cleaning part 6 and at least partially blocks the suction port 24, the comb tooth 252 is connected to the rotating part 29, the driving device drives the rotating part 29 to rotate, so as to drive the scraping part 25 to switch between the first position and the second position, so as to change the effective ventilation area of ​​the suction chamber 240. Figure 4 and Figure 5 The dashed line EF in the diagram represents the top of the inner wall of the suction port. To more clearly illustrate the positional change of the scraping part, the present invention... Figure 7 The arrow-bearing indicator line C indicates the position where the scraper 25 is in contact with the cleaning component 6 (first position). The dotted line pointed to by indicator line D indicates the position of the suction chamber 240 opening when the scraper 25 is in the first position. The arrow-bearing indicator line C' indicates the position where the scraper 25 is separated from the cleaning component (second position). The dotted line pointed to by indicator line D' indicates the position of the suction chamber 240 opening when the scraper 25 is in the second position. When the scraper 25 is in the first position, as... Figure 3 and Figure 5 As shown, the ends of the comb teeth 2521 of the comb member 252 are close to the dotted line EF, that is, the ends of the comb teeth 2521 of the comb member are almost flush with the top wall of the suction port. When the scraping part 25 is in the second position, as shown... Figure 4 , Figure 6 and Figure 7 As shown, most of the comb teeth 2521 of the comb member 252 are below the dotted line EF, meaning that most of the comb teeth 2521 of the comb member 252 are below the top surface of the suction port. When the scraping part 25 moves from the first position of contacting the cleaning part to the second position of disengaging from the cleaning part and stopping in front of the suction port, the comb member 252 forms a downward running trajectory, as shown... Figure 7 As shown; when the scraping section 25 is switched to the second position, as Figure 6 and Figure 7As shown, most of the ends of the comb teeth 2521 of the comb member 252 are positioned below the top wall of the suction port 24, causing the comb member 252 to at least partially block the suction port 24. This results in a change in the cross-sectional area of ​​the suction chamber 240 when the scraper part 25 is in the second position. When the vacuum fan drives the airflow to the second position where the scraper part is located, the scraper assembly forms part of the cavity wall of the suction chamber 240. As the scraper part 25 moves towards the suction port, the cross-sectional area of ​​the cavity wall of the suction chamber 240 gradually decreases until the scraper part reaches the second position, at which point the top wall of the suction port 24 is maximally blocked. The effective ventilation area of ​​the suction chamber 240 is changed, which increases the suction force while keeping the working power of the suction fan unchanged. This allows the dirt entering the suction chamber 240 to be better collected into the suction port 24. In particular, it has a better collection effect on loose and large dirt clumps such as hair entering the suction chamber 240. This is because the larger, loose dirt clumps are deformed by the increased airflow, such as binding more tightly with other heavier dirt or reducing their size. This allows them to enter the suction port more smoothly without clogging it due to their large size, thus greatly improving the dirt suction effect of the surface cleaning equipment. Furthermore, since the scraping assembly forms part of the wall of the suction chamber 240, when the scraping part 25 contacts the cleaning component, the front end of the suction chamber 240 forms a seamless connection with the cleaning component 6. This facilitates the scraping part 25 carrying or pushing the dirt or debris scraped off the cleaning component 6 directly into the suction chamber 240. During the transition of the scraping part 25 from the first position to the second position, as the scraping part 25 moves, under the guiding action of its movement and the centrifugal force of the cleaning component 6, the dirt or debris entering the suction chamber 240 is also conveyed from the suction chamber 240 to the suction chamber along with the movement of the scraping part 25. The suction chamber 240 tends to transport dirt or liquid to the suction port 24. When the scraping part 25 moves to the second position, the effective ventilation area of ​​the suction chamber 240 decreases, which increases the suction force. Under the action of the further increased suction force, the dirt and / or liquid transported by the suction chamber 240 to the vicinity of the suction port 24 are successfully sucked into the suction port 24. This ensures that the dirt scraped off from the cleaning part 6 can be better collected and will not accumulate in the roller brush cavity, especially at the suction port 24. Therefore, the dirt suction effect of the surface cleaning equipment is greatly improved, and the self-cleaning effect of the cleaning part is greatly enhanced.

[0052] If the above process is set in the cleaning operation of the surface cleaning equipment, even if the dirt directly sucked into the suction chamber from the surface to be cleaned causes adhesion or temporary accumulation at the suction port, the active forward transport and pushing of the suction chamber by the movement of the scraper will cause the dirt near the suction port to move or loosen. When the scraper moves to the second position, the effective ventilation area of ​​the suction chamber decreases, which increases the suction force. Under the action of the further increased suction force, the newly transported dirt or dirt in the suction chamber and the dirt near the suction port are smoothly sucked into the suction port, reducing the probability of dirt accumulating or adhering at the suction port, thereby further improving the dirt suction effect of the surface cleaning equipment and improving the cleaning efficiency.

[0053] The upper housing 21 of the floor brush has a downwardly recessed cavity 212, and the front end of the cavity 212 is provided with an extension 211 extending forward from the cavity wall of the cavity 212, such as... Figures 2 to 4 As shown, part of the water tank 71 is located within the cavity 212 of the upper housing 21 of the floor brush. Another part of the water tank 4 extends forward from the cavity wall of the floor brush 212 to cover the extension 211. A heating element 84 is located at the lower part of the extension 211, and the heating element 84 has a heating surface 841 that conforms to the bristles of the cleaning element. The suction port 24 is located in the central area of ​​the lower housing 22, ensuring smooth connection and communication between the suction port 24 and the suction hose 33 in the center of the receiving cavity 23. This ensures that the suction hose 33 can be smoothly connected to the suction pipe at the lower end of the body 1 without bending or twisting, thus ensuring smooth transport of dirt or waste liquid through the suction channel to the waste collection bucket 31. A forward-extending roller brush cavity 20 is provided on the front side of the receiving cavity 23, and a forward-protruding bottom edge 224 is provided at the bottom end of the lower housing 22. Figure 8 As shown, the left and right ends of the front sidewall 221 of the lower housing are provided with a left baffle 222 and a right baffle 223. The front sidewall 221, left baffle 222, right baffle 223, bottom edge 224, and part of the floor brush housing of the lower housing 22 form a roller brush cavity 20. The cleaning component 6 is installed in the roller brush cavity 20. The suction port 24 is located on the front sidewall 221 behind the cleaning component 6. A floor scraper 23 is provided at the front end of the bottom edge 224. Figure 5 and Figure 10When the scraping part 25 is in the first position of contacting the cleaning part 6, the scraping assembly is located above the suction port 24 and installed on the front side of the lower housing 22. The suspended end of the metal scraper 251 extends forward from the front surface of the comb tooth 252. The front surface of the comb tooth 252 is basically flush with the front ends of the left baffle 222 and the right baffle 223. The front side wall 221, bottom edge 224, floor scraper 23, left baffle 222, right baffle 223 and the scraping assembly located below the scraping assembly form a suction chamber 240 located in front of the suction port 24, so that the scraping assembly forms part of the upper cavity wall of the suction chamber 240. The part of the front side wall 221 located below the scraping assembly and on both sides of the suction port 24 forms the rear cavity wall 2401 of the suction chamber 240. The suction port 24 forms the rear port of the suction chamber 240, and the scraping assembly forms part of the cavity opening of the suction chamber 240. The rear cavity wall 2401 slopes longitudinally from bottom to top, so that the suction cavity 240 is funnel-shaped with a larger front end and a smaller rear end. Figure 6 and Figure 11 When the scraping part 25 moves from the first position to the second position, the scraping part 25 is located within the space enclosed by the left baffle 222, the right baffle 223, the front sidewall 221, and the bottom edge 224. The scraping part 25 forms part of the opening of the suction chamber 240, and the comb teeth 252 of the scraping part 25 at least partially cover the front port of the suction chamber 240, thereby changing the effective ventilation area of ​​the suction chamber 240. Figure 5 , Figure 6 and Figure 7 The midline segment EF represents the surface where the top wall of the suction port is located, from... Figure 6 and Figure 7 It can be seen that when the scraping part 25 moves to the second position, the end of the comb tooth 252 is lower than line segment EF, that is, the end of the comb tooth 252 is lower than the top wall of the suction port 24. At least part of the end of the comb tooth 252 blocks the opening of the suction chamber 240. That is, when the airflow flows through the opening of the suction chamber 240, due to the partial blocking by the comb tooth 252, the longitudinal section at the opening of the suction chamber 240 becomes smaller, thereby increasing the suction force of the airflow entering the suction chamber. After the scraping section switches from the first position to the second position, the suction force increases. In addition, the scraping section 25 moves from a position away from the suction port towards the suction port and stops at the suction port. As a result, the dirt and / or liquid are also pushed and pulled by the scraping section, and some of the dirt or liquid is directly carried to the suction port. Together with the increased suction force, the adhesion is better overcome, and the dirt or liquid is quickly drawn into the suction port. This allows the dirt or liquid to enter the suction port smoothly, improving the suction efficiency and thus improving the suction effect.

[0054] Combination Figure 5In this embodiment, the portion of the front sidewall 221 of the lower housing 22 located below the scraping assembly is inclined relative to the vertical and extends obliquely forward from top to bottom. That is, the rear cavity wall 2401 of the suction cavity 240 is inclined relative to the vertical and extends obliquely forward from top to bottom. This makes the vertical cross-sectional area of ​​the suction cavity 240 gradually decrease from front to back in the horizontal direction. As a result, the suction cavity 240, which is wider at the front and narrower at the back, is also set to be larger at the top and smaller at the bottom in the height direction. This further increases the rate of change of the longitudinal cross-sectional area of ​​the suction cavity 240 from front to back, which helps to further improve the flow speed of the suction airflow from front to back, thereby further improving the suction effect. Furthermore, the slope of the front side wall 221 of the lower housing 22, located below the scraping assembly, gradually increases from both ends toward the suction port 24. That is, the slope of the rear cavity wall 2401 of the suction chamber 240 gradually becomes steeper from both ends toward the suction port 24. By reasonably setting the slope change of the rear cavity wall 2401 of the suction chamber 240, the gradually steepening rear cavity wall 2401 smoothly changes the direction and speed of the suction airflow, reducing or avoiding turbulence or eddies caused by the sudden change in the slope of the rear cavity wall 2401. This helps to ensure the suction strength of the suction airflow and also avoids the formation of a dead zone where dirt is easily trapped due to the sudden change in the slope of the rear cavity wall 2401. The left and right ends of the front sidewall 221 of the lower housing 22 located below the scraping assembly have an included angle α with respect to the horizontal direction, 65°≤α≤70°. Similarly, the left and right ends of the rear cavity wall 2401 have an included angle α with respect to the horizontal direction. In this embodiment, α is approximately 68°. The rear cavity wall 2401 is basically vertically positioned near the suction port 24, meaning the slope of the front sidewall 221 of the lower housing 22 with respect to the horizontal direction gradually changes from 68° at the left and right ends to 90° near the suction port 24. In an alternative embodiment, α can also be set to other reasonable values ​​such as 65°, 66°, 67°, 69°, or 70°.

[0055] Combination Figure 8Since the slope of the rear cavity wall 2401 gradually increases from both ends toward the suction port 24, the upper edge of the rear cavity wall 2401 is basically parallel to the axial direction of the cleaning component 210. Since the front sidewall 221 of the lower housing 22 extends obliquely backward from both ends to the suction port 24 in the transverse direction, the lower edge of the rear cavity wall 2401 is inclined relative to the axial direction of the cleaning component 210 and is roughly V-shaped. The rear cavity wall 2401 on one side has an included angle β relative to the axial direction of the cleaning component 210, where 2°≤β≤5°. Specifically, in this embodiment, β is approximately 3°. In alternative embodiments of this embodiment, β can also be set to other reasonable values ​​such as 2°, 2.5°, 3.5°, 4°, and 5°. By reasonably setting the distribution of the upper and lower sides of the rear cavity wall 2401 of the suction chamber 240 relative to the axial direction of the cleaning component 210, the slope of the suction chamber 240 can gradually increase from both ends toward the suction port 24. By using the included angle β, the front of the suction chamber 240 can be set to be wider at the front and narrower at the back. This not only improves the flow effect of the suction airflow from front to back, but also better guides the dirt at both ends to flow towards the suction port 24.

[0056] The liquid distribution component 26 includes a cavity with a liquid flow channel and a liquid distribution surface 262 located on the front side of the cavity, such as... Figures 3 to 10As shown, the rear of the cavity is provided with an inlet 263 connecting the clean water tank 7 and the liquid flow channel. When the water pump works, it sends water from the clean water tank into the liquid flow channel through the inlet. A supply port 261, connected to the liquid flow channel, is provided on the distribution surface 262. Water flows through the liquid flow channel into the supply port 261, which faces the cleaning component to supply water to the bristles on the cleaning component. The supply surface is an arc surface with a radius larger than that of the cleaning component. The distribution surface 262 is concentrically arranged with the outer surface of the cleaning component, and the distribution surface 262 contacts the tip of the upright, dry bristles of the cleaning component 6. When the bristles are wetted and fall onto the roller, there is a gap between the distribution surface 262 and the fallen bristles of the cleaning component. The heating element 84 is located at the extension above the cleaning component. The liquid distribution surface 262 and the heating surface 841 are spaced apart, that is, there is a gap between the liquid distribution surface 262 and the heating surface 841. This gap includes the radial gap of the cleaning component 6, that is, the arc surface where the heating surface is located is located inside the arc surface where the liquid distribution surface is located, and also includes the circumferential gap along the cleaning component, that is, in the clockwise direction, the heating surface is located downstream of the liquid distribution surface, and the two are not connected in the circumferential direction. For example, if the two are spaced apart on the floor brush housing, then the two are separated by the floor brush housing in the circumferential direction. The scraping component 25, the liquid distribution surface 262, the floor brush housing, the heating surface 841 and the outer surface of the cleaning component 6 form a liquid storage gap. When the cleaning component is reversed, because the scraping component and the cleaning component are in contact, the liquid flow accumulates in the liquid storage gap to soak and clean the back side of the cleaning component 6 and the scraping part 25. The front sidewall 221 of the lower housing 22 is also provided with a frame-shaped mounting groove 27, which is located above the rear cavity wall 2401. The groove opening 273 of the frame-shaped mounting groove 27 is set forward. A part of the lower groove wall 272 of the frame-shaped mounting groove 27 forms the top wall of the suction port 24 and is connected to the rear cavity wall 2401. A fixing member 40 is also provided in the frame-shaped mounting groove 27. The fixing member 40 is installed on the lower groove wall 272 by screws and fits against it. The scraping assembly also includes a fixing connector 253, which is located above the metal scraper 251 and fits against the upper surface of the metal scraper. The comb tooth 252 and the fixing connector 253 are connected to the rotating member 29 respectively, that is, the metal scraper 251 is sandwiched between the comb tooth 252 and the fixing connector 253. The cleaning assembly also includes a first flexible connector 4, which includes a flexible body 41 and a first fixed connection end 42 and a second fixed connection end 43 located at both ends of the flexible body. One end of the first flexible connector 4 is connected to the cleaning part 25, and the other end of the first flexible connector 4 is connected to the housing of the floor brush, so that the first flexible connector 4 forms part of the upper cavity wall of the suction chamber 240. The flexible body 41 covers the gap between the housing of the floor brush and the cleaning part 25, thereby preventing dirt from entering the housing and contaminating the electrical components inside the housing, and ensuring the safe operation of the electrical components inside the housing.Since the first flexible connector 4 has a flexible body 41, which is generally made of thermoplastic elastomer, such as thermoplastic rubber or silicone, these materials have a certain elastic deformation. Therefore, under the condition that the suction power of the motor does not change, after the airflow enters the suction chamber, the flexible body is deformed by the pressure. Since the flexible body 41 forms part of the upper cavity wall of the suction chamber 240, the airflow entering the suction chamber 240 squeezes the flexible body 41, which changes the area of ​​the longitudinal section of the suction chamber 240, thereby changing the suction force in the suction chamber 240. In addition, when the flexible body 41 deforms, it also pushes or causes the dirt or liquid to shift on its surface, which also changes the adhesion of the dirt or / and liquid to the cavity wall of the suction chamber, thus making it more conducive to the suction of dirt or / and liquid.

[0057] The floor brush housing has a mounting groove, such as Figures 8 to 11As shown, the rotating component 29 is disposed in the mounting groove. The rotating component 29 includes a shaft core 291, a liquid distribution component 26 and a scraping assembly located at the groove opening of the mounting groove, and at least a portion of the scraping part 25 extends forward from the groove opening. The liquid distribution component 26 is disposed on the front side of the shaft core 291 and above the scraping part 25. The scraping part 25 is connected to the lower end of the shaft core 291. The rotating component 29 drives the scraping part 25 to switch between a first position and a second position. The other end of the first flexible connector 4 is sealed to the lower groove wall of the mounting groove to form a sealed cavity covering the rotating component 29. The rear end of the comb tooth 252 of the scraping part 25 is connected to the front end of the shaft core 291. In this embodiment, since the comb tooth 252 is also a plastic part, the comb tooth 252 is integrally formed on the lower end of the front surface of the shaft core 291 and protrudes forward along the front surface of the shaft core 291. The fixing member 40 is provided above the metal scraper. The rear end of the fixing member 40 is attached to the front surface of the shaft core, the lower surface of the fixing member is attached to the upper surface of the metal scraper, and the upper surface of the comb tooth is attached to the lower surface of the metal scraper, so as to fix the metal scraper between the comb tooth 252 and the fixing member 40. The mounting groove is a frame-type mounting groove 27 located on the front sidewall 221 of the lower housing 22. The shaft core portion 291 has a shaft core 293. The longitudinal section of the shaft core portion 291 is fan-shaped, and the shaft core 293 is located at the center of the fan shape. The front surface 295 of the shaft core portion is a plane extending radially from the shaft core 293 along the fan shape. The shaft core portion includes at least a portion of an arcuate surface 294 located at the rear. The arcuate surface 294 extends circumferentially along the fan shape to the front surface 295 and is connected to the lower end of the front surface 295 as an integral structure, making the shaft core portion a hollow fan-shaped cavity. Multiple reinforcing ribs are provided inside the fan-shaped cavity, penetrating the front surface and the arcuate surface 294 of the fan-shaped cavity. 291 is rotatably connected to the left side plate 222 and right side plate 223 of the lower housing via the shaft core 293. This structure ensures the strength of the shaft core while reducing its weight, allowing the movement of the two ends of the metal scraper and comb teeth to be synchronized with the shaft core. Especially when external forces are applied to the metal scraper or comb teeth, the strength of the shaft core 291 can withstand the impact of the external forces, or the strength of the shaft core 291 can withstand the force exerted on the shaft core by the metal scraper and comb teeth. Under the drive of the drive device, it can effectively drive the comb teeth and metal scraper to rotate without causing large deformation, or even breakage due to long-term deformation.

[0058] A second flexible connector 4 is also provided between the liquid dispensing component 26 and the scraping part 25. The rotating component 29 drives the scraping part 25 to switch between a first position and a second position. The second flexible connector 4 is driven by the scraping part 25 to squeeze forward and contract or stretch backward, so that the rotational gap between the liquid dispensing component 26 and the scraping part 25 is covered by the second flexible connector 4. Figures 3 to 10As shown, in this embodiment, line segment EF represents the location of the top wall of the suction port. The first fixed connection end 42 is embedded in the fixing member 40, and the second fixed connection end 42 is embedded in the rear surface of the comb member 252. The scraping assembly also includes a second flexible connection member 4. One end of the second flexible connection member 4 is connected to the liquid distribution member 26, and the other end of the second flexible connection member 4 is connected to the fixed connection member 253. The second flexible connection member 4 also includes a flexible body 41 and a first fixed connection end 42 and a second fixed connection end 43 located at both ends of the flexible body 41. The metal scraper is clamped in the comb. Between the toothed component 252 and the fixed connector 253, there is also a rotating component 29 movably installed in the frame-shaped mounting groove 27. The rotating component 29 is located on the rear side of the scraping part and the liquid dispensing component 26. The liquid dispensing component 26 is fixed to the upper cavity wall 271 of the frame-shaped mounting groove by a screw structure, and at least part of the upper surface of the liquid dispensing component 26 is in contact with the upper cavity wall 271. When the liquid dispensing component 26 and the fixed component 40 are installed in the frame-shaped mounting groove 27 in sequence, the scraping assembly is fixed in the frame-shaped mounting groove. The driving device drives the rotating component to rotate, thereby driving the scraping part to switch between the first position and the second position. The flexible body 41 of the first flexible connector 4 covers the gap between the fixing member 40 and the comb member, and the flexible body 41 of the second flexible connector 4 covers the gap between the liquid distribution member and the fixing connector 253, thereby ensuring the sealing effect in the frame-shaped mounting groove and preventing sewage and / or dirt from entering the frame-shaped mounting groove. This greatly reduces the possibility of dirt and / or sewage entering the brush housing and ensures the working safety of the electrical components in the brush housing.

[0059] When the scraping part 25 moves from the first position to the second position, as Figures 3 to 11 As shown, the first flexible connector 4 bends upward, and the lower end of the scraping part 25 is lower than the lowest end of the first flexible connector 4. The scraping part 25 is located at the front port of the suction chamber 240, forming part of the opening of the suction chamber 240. At least some of the comb teeth 2521 of the comb teeth 252 of the scraping part 25 cover the front port of the suction chamber 240, thereby reducing the ventilation area of ​​the front port of the suction chamber 240. Figure 5 and Figure 6 As can be seen, line segment EF and the top wall of suction port 24 are on the same plane. In this embodiment, line segment EF represents the top wall of suction port 24. When the scraping part 25 is in the first position, such as Figure 5 and Figure 10 As shown, the suspended end of the metal scraper 251 protrudes forward from the groove 273 onto the front surface of the comb tooth 252 and abuts against the cleaning component 6. The end of the comb tooth 252 also abuts against the cleaning component 6, and the lower end of the comb tooth 252 is basically flush with line segment EF, that is, the lower end of the comb tooth 252 is basically flush with the suction port. Figure 5It can be seen that the flexible body 41 of the first flexible connector 4 is basically horizontally arranged and parallel to the line segment EF. That is, the height of the flexible body 41 to the upper surface of the lower housing of the floor brush is higher than the wall thickness of the top wall of the suction port 24. The flexible body 41 covers the area between the fixing member 40 and the comb member 252. The upper top wall of the suction chamber 240 is formed by part of the lower surface of the first flexible sealing member 4 and the comb member 252. Since the scraping part 25 abuts against the cleaning part, and the extension 211 of the floor brush housing is provided with a heating element 84 for heating the bristles of the cleaning part and the water contained therein, the lower surface of the heating element 84 and the heating surface 841 are in contact with the cleaning part 6. The scraping part 25 and the liquid distribution member 26 are connected by the second flexible connector 4. Therefore, the scraping part 25 and the liquid supply surface 26 are spaced apart by the second flexible connector 4, and the liquid supply surface 261 and the heating surface 841 are separated by the outer wall of the extension 211. Separated by the extension 211, the scraping part 25, the second flexible connector 4, the liquid distribution surface 262, the sidewall of the heating element 84, and the outer surface of the cleaning element 6, a liquid storage gap 9 is formed. Due to the presence of the second flexible connector 4 and the separation of the liquid distribution surface 262 and the scraping part 25, the circumferential length of the liquid storage gap 9 along the cleaning element 6 is increased. The scraping part 25 is located near the horizontal center plane where the central axis o of the cleaning element 6 is located. The heating element 84 is located directly above the cleaning element 6, and the liquid distribution surface 262 continues upward from the liquid supply port 261. The liquid distribution surface 262 and the heating surface 841 of the heating element 84 are separated by the lower end face of the extension 211, further increasing the circumferential length of the liquid storage gap 9 along the cleaning element 6. When the cleaning element 6 rotates into the liquid storage gap 9, nearly 1 / 4 of the circumference of the cleaning element 6 is within the liquid storage gap 9, thus increasing the surface area of ​​the bristles of the cleaning element 6 that is soaked each time. Furthermore, from... Figure 5 It can be seen that the flexible body 41 of the second flexible connector 4 is squeezed into the space between the liquid distribution member and the fixed connector 253, so that it deforms into a V shape with the opening 45 facing forward, further expanding the liquid storage space of the liquid storage gap 9, so that the cleaning member can absorb water more fully and be soaked in hot water for cleaning, resulting in higher cleaning efficiency and better cleaning effect.

[0060] When the scraping part 25 is in the second position away from the cleaning part 6, such as Figure 6 , Figure 7 and Figure 11 As shown, the metal scraper 215 and the comb teeth 252 move from the first position toward the suction port 24 away from the cleaning component 6 and abut against the lower groove wall 272 of the frame-shaped mounting groove 27. Since a portion of the lower groove wall 272 forms part of the top wall of the suction port 24, from... Figure 6As can be seen, when the scraping part 25 is in the second position, the scraping part 25 abuts against the front side of the top wall of the suction port 24, and the flexible body 41 of the first flexible connector 4 is squeezed and deformed, recessing into the gap between the fixing member 40 and the comb member 252, thereby increasing the storage space of the suction chamber 240. Figure 7 The indicator line C points to a schematic diagram of the scraper 25 when it is in the first position, and the indicator line C' points to a schematic diagram of the scraper 25 when it is in the second position. Figure 7 Indicator lines D and D' respectively illustrate the positional changes of the suction chamber opening when the scraper is in the first and second positions. Figure 6 and Figure 7It can be seen that the lower end of the comb tooth 252 is below line segment EF, that is, most of the lower end of the comb tooth 252 is lower than the top wall of the suction port 24. Therefore, when the scraping part 25 is in the second position, part of the teeth of the comb tooth 252 of the scraping part 25 blocks the suction port, forming a slit effect that increases the suction force. During the movement of the first flexible connector 4 toward the suction port, the deformation of the flexible body also causes the dirt or liquid entering the suction chamber to shift, reducing the adhesion force. Due to the deformation of the first flexible connector 4 and the partial blocking of the suction chamber 240 opening by the comb tooth 252, that is, the partial blocking of the front port of the suction chamber 240 by the comb tooth 252, a slit effect is formed at the opening of the suction chamber, making the suction force more effective. The suction force at the opening of the sludge chamber 240 is increased. Since the first fixed end 42 of the first flexible connector 4 is directly connected to the top wall of the suction port 24, the sludge chamber 240 and the suction port 24 are seamlessly connected. The first flexible connector 4 moves with the scraping part 25 and moves towards the suction port 24, thus bringing the dirt and / or liquid entering the sludge chamber 240 to the suction port 24. The suction port 24 is located at the rear port of the sludge chamber 240, and the area of ​​the suction port 24 is smaller than the area of ​​the longitudinal section of the sludge chamber 240. Therefore, the suction force at the suction port 24 is further increased, so that the dirt or liquid entering the sludge chamber is more smoothly sucked into the suction port, avoiding the adhesion and accumulation of dirt at the suction port. As the scraping part 25 moves towards the suction port 24, the second flexible connector 4 gradually unfolds. During the unfolding of the flexible body 41 of the second flexible connector 4, the dirt or debris adhering in the liquid storage gap is pulled and moved, reducing the adhesion force. As the scraping part moves away from the cleaning part, the lower port of the liquid storage gap 9 is opened, and the loosened dirt with reduced adhesion force is more easily detached from the liquid storage gap under the suction of the airflow. With the movement of the scraping part and the flattening deformation of the second flexible connector, it is pushed and thus, under the action of suction force, enters the suction chamber 240 from the lower port of the liquid storage gap until the scraping part 25 is in the second position. The lower port of the liquid storage gap 9 is fully opened, allowing the dirt and / or liquid scraped off the cleaning parts after soaking and cleaning to be smoothly sent into the suction chamber 240 and then drawn into the suction port. As the liquid flows through the scraping part, it further washes the back side of the scraping part, preventing dirt from accumulating on the back side of the scraping part and releasing the dirt and liquid in the liquid storage gap. As the cleaning parts are soaked and cleaned, the heavy dirt soaked in the cleaning cloth is carried out by the wastewater. When the scraping part moves back to the first position, the liquid supply port continuously provides clean water to soak and clean the cleaning parts again, achieving rinsing of the cleaning cloth and bristles of the cleaning parts, further improving the cleaning efficiency and cleaning effect.In existing technologies, the scraping part is always in contact with the cleaning component. The waste liquid above the scraping part can only flow down to the suction port through the squeezing action of the cleaning cloth and bristles on the cleaning component. Since the scraping part cannot open, the clean water flowing from the supply port mixes with the waste liquid and dirt squeezed out of the cleaning component. During the cleaning process, the waste liquid continuously cleans the component, requiring more cleaning cycles to achieve thorough cleaning. In contrast, the scraping assembly of this invention forms part of the upper wall of the suction chamber. The scraping part has a first position and a second position and can switch between them. During this switching, the suction force at the suction chamber and suction port changes. Simultaneously, the scraping part causes the waste in the suction chamber to shift or loosen, and can even push the waste towards the suction port, preventing waste from remaining in the suction chamber and the liquid storage gap. Furthermore, when the scraping part is in the second position, the liquid storage gap is opened. This system draws both dirt and grime into the suction port. When the scraper comes into contact with the cleaning part again, the liquid supply port provides clean cleaning fluid to continue soaking and cleaning the part. As the part is cleaned, the cleaning fluid in the reservoir becomes increasingly clean, ensuring that the cleaning fluid for the next cleaning is relatively clean. This improves the cleaning efficiency and avoids the problem of low efficiency caused by residual dirt not being completely removed when the scraper is constantly in contact with the part. It also solves the technical problem of dirt accumulating in the reservoir on the back of the scraper. Furthermore, it allows for a seamless connection between the suction chamber and the suction port. The movement of the scraper pushes the dirt entering the suction chamber smoothly into the suction port, preventing dirt from accumulating on the front wall near the suction port. This eliminates the need for customers to manually clean the roller brush chamber, making the automatic cleaning of the surface cleaning device more intelligent and efficient, and reducing the cleaning burden on customers.

[0061] The base 8 includes a tray 81 and a bottom shell 82, such as Figure 3 and Figure 4As shown, the tray 81 is fastened to the bottom shell 82 to form a receiving cavity. The receiving cavity is equipped with a heating device and a fan 85. The heating device includes heat dissipation fins 83 and a heating element 84. The heating element 84 is a PTC heating element. The front of the tray 81 is provided with a cleaning groove 811. The bottom of the cleaning groove 811 is provided with an opening. The heating device is installed in the opening through a mounting bracket, so that the upper surface of the heating element 84 is exposed from the opening and flush with the opening, thereby ensuring that the heating element 84 can directly heat and dry the cleaning part 6 and its tufts. This solution can also control the heating device to work during the self-cleaning process of the cleaning parts. The heating element 84 heats the cleaning liquid in the cleaning tank 811, and the lower part of the cleaning parts is immersed in the heated cleaning liquid. This allows the cleaning cloth and its tufts of the cleaning parts that have rotated into the cleaning tank to be soaked in hot water, thereby achieving hot water self-cleaning of the cleaning parts and their tufts. In order to improve efficiency and save energy, the heating element 84 located in the extension 211 can be controlled to work intermittently, while the heating device and / or fan 85 located in the base can be controlled to work continuously. This technical solution improves the self-cleaning effect of the cleaning parts 6 and increases the self-cleaning efficiency of the cleaning parts, especially for cleaning parts that are heavily soiled. To further improve drying efficiency, the front end of the tray 81 is also provided with a front baffle 812, and the front baffle 812 is also provided with an air guide hole 813. The air guide hole 813 is inclined towards the cleaning component 6. The upper part of the heating element 84 is provided with heat dissipation fins 83. A fan 85 and an air guide channel connecting the fan and the heat dissipation fins are provided behind the heating device corresponding to the heat dissipation fins 83, so that the fan can guide the hot air generated by the heating device to the air guide hole 813, so that the hot air generated by the heating device can be blown to the cleaning component 6, the scraping part 25 and the first flexible connector through the air guide hole, thereby further improving the drying efficiency of the bristles of the cleaning component 6, while also drying the scraping part 25 and the first flexible connector 4 with hot air.

[0062] Of course, it is understandable that when the scraping part is in the second position, the flexible body of the first flexible connector, after being compressed and deformed, can be an n-shaped or arc-shaped depression with the opening facing downwards; when the scraping part is in the first position, the flexible body of the second flexible connector, after being compressed and deformed, can be an arc-shaped depression with the opening facing forwards; the second flexible connector may not be provided between the liquid distribution component and the scraping part, but a rubber-based hard seal may be provided above the scraping part, the hard seal including a tongue-shaped sealing lip, and a sealing groove with the opening facing downwards provided below the liquid distribution component, the tongue-shaped sealing lip slidingly sealing the sliding gap between the scraping part and the liquid distribution component within the sealing groove; alternatively, the liquid distribution component may be fixedly connected to the rotating component or the scraping part, so that the liquid distribution component can also rotate relative to the floor brush housing together with the scraping part, and the second flexible connector may be provided between the liquid distribution component and the floor brush housing, or a sliding sealing structure may be provided between the liquid distribution component and the floor brush housing; the base may also only have a heating device at the bottom of the cleaning tank. Such structures that do not depart from the concept of the present invention are also within the protection scope of the present invention, and will not be listed in detail here.

[0063] Example 2:

[0064] The difference between this embodiment and Embodiment 1 lies in the different structures of the scraping assembly and the rotating component.

[0065] The surface cleaning device of the present invention includes a floor brush, such as... Figures 12 to 16 As shown, the clean water tank is mounted on the floor brush, and the top cover of the water tank is also equipped with a handle 71 to facilitate placing the clean water tank 7 on the upper housing 21 of the floor brush and to facilitate customers removing the clean water tank 7 from the upper housing 21 of the floor brush to add water. The cleaning assembly includes a first flexible connector 4, which, when the cleaning part 25 is in the first position, such as Figure 12 and Figure 14As shown, a portion of the comb teeth 2521 of the scraping part 25's comb teeth 252 is lower than line segment EF, meaning a portion of the comb teeth 2521 is lower than the suction port 24. This means the comb teeth 2521 partially block the suction port, creating a slit effect, thereby increasing the suction force of the suction chamber 240. Due to the presence of the first flexible connector 4, and the downward recess in the middle of the flexible body 41 of the first flexible connector 4, and the upward recesses at the connection points between the two ends of the flexible body 41 and the first fixed connection end 42 and the second fixed connection end 43, the flexible body 41 can deform along the recesses under the pressure of the airflow, thereby changing the suction force of the airflow in the suction chamber. Even if larger particles of dirt are sucked into the suction chamber, the dirt can squeeze the flexible body 41 to deform it, allowing the larger particles of dirt to enter the suction chamber without getting stuck in the suction chamber 240. Under the increased suction force, they are more easily drawn into the suction port 24. When the scraping part 25 moves to the second position, the first flexible connector 4 bends and deforms downward, and the lowest end of the first flexible connector 4 is lower than the lower end of the scraping part 25, so that part of the first flexible connector 4 blocks the suction port, thereby reducing the ventilation area of ​​the suction chamber. The first flexible connector 4 deforms under the backward push of the scraping part 25, causing the dirt or liquid entering the suction chamber to loosen or even move away from the adhesion as the scraping part and / or the flexible body moves, so that it can be drawn into the suction port more smoothly. Due to the concave setting on the flexible body 41, the flexible body 41 is concave downward, that is, the flexible body 41 is squeezed into the suction chamber. Even if the longitudinal section of the suction chamber 240 is smaller here, the flexible body can deform. Even if a large dirt moves to the lowest end of the flexible body, it can still squeeze the flexible body to deform, so that it can pass through the lowest end of the flexible body. Because the flexible body 41 can deform under the pressure of the dirt, and there is a deformation space above the flexible body 41, that is, the gap between the fixing part 40 and the comb part 252, the dirt can smoothly pass through the area corresponding to the flexible body 41 and enter the suction port 24 under the action of a large suction force. When the scraping part 25 is in the second position, the first flexible connector 4 bends downward, and the lowest end of the first flexible connector 4 is lower than the lower end of the scraping part 25, so that part of the first flexible connector 4 is located inside the suction chamber 40 and blocks the suction port 24, thereby reducing the ventilation area of ​​the suction chamber 240. Figure 13 and Figure 15As shown, all the teeth 2521 of the comb member 252 are lower than the line segment EF, that is, all the teeth 2521 of the comb member 252 are lower than the top wall of the suction port 24. This causes the teeth of the comb member to partially block the suction port, further strengthening the slit effect. Therefore, the suction force at the opening of the suction chamber is further increased. As the scraping part 25 moves towards the suction port, on the one hand, the scraping part 25 pushes some of the dirt near it into the suction chamber 240. On the other hand, the lower end of the liquid storage gap is opened, and the dirt and dirt in the liquid storage gap are released with the movement of the scraping part 25. The adhesion to the roller brush cavity wall is loosened and then moved. With the operation of the suction fan, the released dirt and dirt are drawn into the suction chamber 240. The flexible body 41 is squeezed and deformed into a V-shaped state with the opening 45 facing upward. The V-shaped opening 45 is flush with the upper wall of the suction chamber 240. Therefore, the lowest point of the V-shape is lower than the upper wall of the suction chamber 240 and lower than the top wall of the suction port 24. Furthermore, the lowest point of the flexible body 41 is lower than the end of the comb teeth 2521 of the comb member 252. Thus, when the suction fan is working, a slit effect occurs when the airflow is drawn to the comb teeth 2521 of the comb member 252. The suction force at the comb teeth 2521 increases for the first time. Due to the slit effect, the suction force in the area in front of the suction port is even greater, rapidly drawing dirt and liquid into the suction chamber. The flexible body 41 then deforms. At the concave V-shaped section, the area of ​​the longitudinal section of the suction chamber 240 gradually decreases, reaching its minimum at the lower end of the V-shape. This further increases the suction force within the suction chamber. On one hand, the dirt can be squeezed and deformed by the flexible body, allowing it to easily pass through the area corresponding to the flexible body 41. On the other hand, because the flexible body 41 changes the area of ​​the longitudinal section of the suction chamber 240, the suction force in this area further increases. Under the increased suction force, the dirt and liquid can smoothly pass through the suction chamber and move towards the suction port 24, where they are drawn into the suction port 24 and collected into the sludge container 3.

[0066] In this embodiment, the rotating component 29 further includes an arc-shaped plate 292 disposed outside the shaft core portion 291. The shaft core portion 291 is a fan-shaped cavity having a shaft core 293 and an arc-shaped surface 294, such as... Figures 12 to 16As shown, the arc-shaped plate 292 fits against the arc-shaped surface 294 of the shaft core 291. A metal scraper 251 and a comb tooth 252 are arranged in the forward-extending area of ​​the arc-shaped surface 294. The comb tooth 252 and the arc-shaped surface 294 clamp the metal scraper 251 between them. A worm gear 52 is provided on the outer surface of the arc-shaped plate 292. A drive device, a motor (not shown in the figure), is provided inside the floor brush housing. A worm (not shown in the figure) is provided at the shaft end of the motor. The worm gear 52 and the worm rotate under the drive of the motor, thereby driving the rotating component 29 to rotate. The front end of the arc-shaped plate 292 and the comb tooth... The rear end of 252 has a floating gap, within which an elastic element is installed. This allows the shaft core 291 to drive the scraping part 25 to float relative to the arc-shaped plate 292. This ensures that when the scraping part 25 is in the first position, the metal scraper 251 and the comb teeth 252 remain in contact with the cleaning cloth and bristles of the cleaning component, even if the bristles shorten due to prolonged use. Furthermore, when external force impacts the scraping part, the elastic element reduces the impact on the motor, preventing overcurrent faults caused by poor rotation or stalling when the motor is subjected to significant impact. A spring 213 is also provided between the heating element 84 and the extension 211. Figure 12 and Figure 13 As shown, this allows the heating element to float relative to the extension, ensuring that the heating surface 841 of the heating element 84 remains in contact with the outer surface of the cleaning element 6, thus improving the heating efficiency of the cleaning element. Combined with Figure 16 This diagram shows a surface cleaning device mounted on a base for self-cleaning, with the cleaning component of the floor brush located within the cleaning tank. This partial sectional view illustrates the positional relationship between the scraping assembly and the cleaning component when the scraping part 25 is in its second position under the influence of the rotating component. Figure 16 It can be seen that the arc-shaped surface 294 of the shaft core 291 and the fixed connector 253 are integrated into a single structure through secondary injection molding, which cooperates with the comb tooth 252 to fix the metal scraper 251 between them. The base is equipped with a heating device and a fan (not shown in the figure). An air guide 813 is provided on the front baffle 812 of the base. No heating device is provided on the cleaning tank 811. A shield 86 is also provided above the front baffle 812 of the base to prevent the sewage from being splashed out of the base and contaminating the ground during self-cleaning.

[0067] Of course, it is understandable that the flexible body 41 can also be U-shaped or arc-shaped with an upward opening when the scraping part 25 is in the second position; of course, it is understandable that the shaft core 291 can also be set as a solid structure, such as Figure 14 and Figure 15As shown, this ensures better strength of the shaft core. The clean water tank can also be mounted on the machine body, and a removable roller brush cover can be installed on the upper housing 21 of the floor brush, with the heating element 84 mounted on the roller brush cover. Alternatively, the liquid dispensing component and the shaft core can be integrated into a single structure, allowing the liquid dispensing component to rotate relative to the floor brush along with the scraping part. Such structures, without departing from the concept of this invention, are also within the scope of protection of this invention, and will not be listed individually here.

[0068] The remaining structures and their beneficial effects in this embodiment are the same as in Embodiment 1, and will not be described in detail here.

[0069] Example 3

[0070] The difference between this embodiment and Embodiment 2 lies in the structure of the roller brush cavity, the cleaning component 6, and its installation method.

[0071] As a surface cleaning device with good cleaning effect as described in this invention, such as Figures 17 to 19 As shown, the surface cleaning device includes a surface cleaning unit and a base. The surface cleaning unit is a self-moving cleaning robot 2, including an upper shell 21 and a lower shell 22. The bottom of the lower shell 22 is provided with a roller brush cavity 20 and a suction port 24. The cleaning component is disposed in the roller brush cavity 20 at the bottom of the lower shell 22. The sludge bucket 31 is disposed at the rear of the lower shell 22. The rear side of the roller brush cavity is provided with a liquid distributing component 26 and a sludge scraping assembly. In this solution, the sludge scraping assembly includes a sludge scraping part 25 and a first flexible connector 4. The liquid distributing component 26 and the sludge scraping part 25 are fixedly installed together and connected to a rotating component 29 so that the liquid distributing component 26 and the sludge scraping part 25 rotate together relative to the shell, thereby allowing the sludge scraping part 25 to switch between a first position and a second position. A sealing component is provided between the liquid distributing component 26 and the cavity wall of the roller brush cavity 20 to prevent sludge from entering the shell of the floor brush and to ensure the safe operation of the electrical components inside the floor brush shell. The other detailed structures of the robot's scraping components and rotating parts can be consistent with those in Example 1 or Example 2, and will not be described in detail here. There are also various base station structures for the robot to perform self-cleaning in the prior art. When the surface cleaning robot enters the base to perform self-cleaning, the working process and principle of the scraping components during switching and in the first and second positions can be consistent with those in Example 1 and Example 2, and will not be described in detail here.

[0072] In addition to the preferred embodiments described above, those skilled in the art can make various changes and modifications according to the present invention, and can also combine the above embodiments. As long as they do not depart from the spirit of the present invention, they should all fall within the scope of protection of the claims of the present invention.

Claims

1. A surface cleaning device with good suction effect, comprising a floor brush with a cleaning component installed, the housing of the floor brush having a liquid distribution component, a scraping assembly located behind the cleaning component, a suction port, and a driving device, the scraping assembly including a scraping part, the driving device driving the scraping part to move via a rotating component, characterized in that, The scraping component and the housing of the floor brush cooperate to form a suction chamber located upstream of the suction port. The scraping component forms part of the cavity wall of the suction chamber. The scraping part has a first position that abuts against the cleaning component and a second position that is detached from the cleaning component and at least partially covers the suction port. The driving device drives the rotating component to rotate, causing the scraping part to switch between the first position and the second position, so as to change the effective ventilation area of ​​the suction chamber.

2. The surface cleaning equipment according to claim 1, characterized in that, The floor brush housing includes a lower housing, a suction port located in the middle area of ​​the lower housing, a scraping assembly located above the suction port and mounted on the front side of the lower housing, such that the scraping assembly forms part of the upper cavity wall of the suction chamber, the suction port forms the rear port of the suction chamber, the scraping part moves from a first position to a second position, and the scraping part at least partially covers the front port of the suction chamber, thereby changing the effective ventilation area of ​​the suction chamber.

3. The surface cleaning equipment according to claim 1 or 2, characterized in that, The smear assembly also includes a first flexible connector, one end of which is connected to the smear scraping part, and the other end of which is connected to the housing of the floor brush, so that the first flexible connector forms part of the upper cavity wall of the suction chamber.

4. The surface cleaning equipment according to claim 3, characterized in that, The scraping part is controlled to move from the first position to the second position, and the first flexible connector is squeezed and deformed, thereby changing the effective air passage area of ​​the suction chamber.

5. The surface cleaning equipment according to claim 4, characterized in that, The first flexible connector bends downward and deforms, with its lowest point lower than the lower end of the scraping part, so that the first flexible connector partially blocks the suction port, thereby reducing the ventilation area of ​​the suction chamber.

6. The surface cleaning equipment according to claim 4, characterized in that, The first flexible connector bends upward, the lower end of the scraping part is lower than the lowest end of the first flexible connector, and the scraping part at least partially blocks the front port of the suction chamber, so that the ventilation area of ​​the front port of the suction chamber becomes smaller.

7. The surface cleaning equipment according to claim 2, characterized in that, The lower end of the front side wall of the lower housing is provided with a bottom edge extending forward. The lower housing also includes a left baffle and a right baffle located at both ends of the bottom edge and connected perpendicularly to the bottom edge. The front side wall of the lower housing is inclined towards the suction port from the left baffle and the right baffle respectively. The scraping part, the bottom edge, the ground scraper strip located at the front end of the bottom edge, the front side wall, the left baffle and the right baffle form a suction chamber.

8. The surface cleaning equipment according to claim 7, characterized in that, The front sidewall of the lower housing slopes longitudinally from bottom to top and backward, so that the suction chamber is funnel-shaped with a larger front port and a smaller rear port.

9. The surface cleaning equipment according to claim 3, characterized in that, The floor brush housing has a mounting groove, and a rotating component is located in the mounting groove. The rotating component includes a shaft core, a liquid dispensing component, and a smearing assembly located at the opening of the mounting groove. At least a portion of the smearing assembly extends forward from the opening. The liquid dispensing component is located on the front side of the shaft core and above the smearing assembly. The smearing assembly is connected to the lower end of the shaft core. The rotating component drives the smearing assembly to switch between a first position and a second position. The other end of the first flexible connector is sealed to the lower wall of the mounting groove to form a sealed cavity that covers the rotating component.

10. The surface cleaning equipment according to claim 8, characterized in that, A second flexible connector is provided between the liquid dispensing component and the scraping part. The rotating component drives the scraping part to switch between the first position and the second position. The second flexible connector is driven by the scraping part to squeeze and contract forward or stretch backward, so that the rotation gap between the liquid dispensing component and the scraping part is covered by the second flexible connector.

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