A surface cleaning device with good suction power

Abstract

The present invention discloses a surface cleaning device with good suction force, comprising a floor brush with a sewage suction port, a body hinged to the floor brush, and a sewage suction fan, wherein the floor brush is provided with a roller brush for cleaning the surface to be cleaned and a scraping member and a combing member for cleaning the roller brush, wherein the scraping member and the combing member are arranged above the sewage suction port in sequence from top to bottom, and is characterized in that the combing member is provided with a plurality of comb teeth, a gap is formed between two adjacent comb teeth, the comb teeth at least partially extend downward, so that the gap is at least partially located between the sewage suction port and the roller brush to form a slit effect area, when the sewage suction fan is working, the wind pressure in the slit effect area increases, and an unbalanced airflow is generated at the sewage suction port, and entangled objects, dirt, and dirty liquid such as hair scraped off by the comb teeth and the scraping member are smoothly sucked into the sewage suction port under the action of the larger wind pressure of the unbalanced airflow, thereby further improving the sewage suction effect and enhancing the sewage suction force of the surface cleaning device.

Description

Technical Field

[0001] The invention belongs to the technical field of cleaning appliances, and specifically provides a surface cleaning device. Background Art

[0002] With the development of surface cleaning technology, surface cleaning equipment has gradually entered people's family life and become a common appliance for cleaning floors. Surface cleaning equipment generally includes a body and a floor brush. The floor brush is provided with a roller brush as a cleaning part, and the friction between the roller and the floor achieves cleaning. In the process of the cleaning part cleaning the floor, it is necessary to use a scraping part to synchronously scrape the sewage and adhered dirt on the cleaning part, so that the cleaning part can clean the floor surface to be cleaned more cleanly. In addition, in the process of cleaning hair, thread ends and other entanglements, these entanglements are easily entangled on the outer surface of the cleaning part, especially the outer periphery of a single roller. In order to clean the foreign matter entangled on the cleaning part, the technicians set comb teeth on the floor brush so that the entanglements on the outer surface of the cleaning part can be scraped off by the comb teeth.

[0003] For example, the prior art application No. 201711481216.4, entitled "Cleaning device with a combing unit for removing debris from a cleaning roller", discloses that the combing unit includes a series of spaced protrusions or teeth extending into the cleaning roller to prevent the accumulation and removal of debris (e.g., hair, thread, etc.), the protrusion extends along most of the cleaning roller and partially extends into the cleaning roller to intercept the debris as it passes around the roller, and the protrusion has an angled leading edge that is not aligned with the center of rotation of the cleaning roller and is directed in the direction of rotation of the cleaning roller or against the direction of rotation of the cleaning roller. The shape and configuration of the combing unit and the protrusion are designed to facilitate the removal of debris from the cleaning roller while having minimal impact on the operation of the cleaning device. Although the protrusions or teeth can effectively prevent the accumulation and entanglement of hair, thread, etc., the intervals between the protrusions or teeth are small. Therefore, solid waste is easily retained in the intervals between the protrusions or teeth, and the entangled objects such as hair, thread, etc. may be entangled on the protrusions or teeth and cannot enter the suction port. Therefore, cleaning the dirty protrusions or teeth brings new troubles to customers; at the same time, since most of the protrusions extend into the cleaning roller, especially the leading edge thereof is not aligned with the rotation center of the cleaning roller, and is guided in the rotation direction of the cleaning roller or against the rotation direction of the cleaning roller, when the cleaning roller rotates, the resistance to the rotation of the cleaning roller is increased. This increases the workload of the motor that drives the cleaning roller to rotate, and the motor becomes insufficiently powered, requiring a higher-power motor to drive it, which increases the cost of the surface cleaning device and wastes energy and resources. In addition, long-term use of the protrusions or teeth of such a structure will cause long-term and large-area friction between the cleaning parts of the cleaning roller, resulting in tooth marks on the cleaning roller, which greatly reduces the service life of the cleaning parts of the cleaning roller. Local thinning of the cleaning parts of the cleaning roller will also lead to uneven cleaning effectiveness of the cleaning roller, resulting in problems with local incomplete cleaning, and causing the cleaning effect of the surface cleaning device to decline after a period of use. Summary of the invention

[0004] The object of the present invention is to provide a surface cleaning device, which utilizes the comb teeth of a combing member to extend downward to at least partially cover the sewage suction port, so that the gap between two adjacent comb teeth corresponding to the sewage suction port forms a slit effect area, the wind pressure in the slit effect area is increased, the suction effect on dirty liquid, dirt and entangled objects is good, and the suction force of the surface cleaning device is further improved.

[0005] In order to solve the above-mentioned problems in the prior art, the present invention provides a surface cleaning device with good suction power, comprising a floor brush with a sewage suction port, a body hinged to the floor brush, and a sewage suction fan, the floor brush is provided with a roller brush for cleaning the surface to be cleaned and a scraping member and a combing member for cleaning the roller brush, the scraping member and the combing member are arranged above the sewage suction port in sequence from top to bottom, the combing member is provided with a plurality of comb teeth, a gap is formed between two adjacent comb teeth, and the comb teeth at least partially extend downward so that the gap is at least partially located between the sewage suction port and the roller brush to form a slit effect area.

[0006] Furthermore, the effective area of ​​the slit effect zone is S, and the equivalent area of ​​the sewage suction port is S 0 , where 2≤S / S 0 ≤12.

[0007] Furthermore, the sewage suction port is flat, and the top of the sewage suction port is not lower than the central axis of the roller brush, the height of the sewage suction port covered by the through groove is h, and the height of the sewage suction port is H, wherein 0.2≤h / H≤0.25.

[0008] Furthermore, the width of the comb teeth is b, and the distance between two adjacent comb teeth is L, wherein b>L, and the distance L satisfies 0.7mm≤L<1.5mm.

[0009] Furthermore, the combing member also includes a connecting portion that connects at least the upper portion of the comb teeth, and the lower end of the connecting portion is arranged below the top of the sewage suction port.

[0010] Furthermore, a guide groove is provided on the connecting portion, and the guide groove is arranged corresponding to the gap.

[0011] Further, the guide groove is formed by the gap extending upward along the connecting portion; or, the guide groove is formed by the gap extending upward through the connecting portion to the lower surface of the scraping section.

[0012] Furthermore, the comb teeth at least partially extend into the bristles of the roller brush, the comb teeth at least partially are located below the central axis of the roller brush, and the front tooth surfaces of the comb teeth extend downward along the outer circumference of the roller brush.

[0013] Furthermore, the scraping member and the combing member both contact with the roller brush, the front end of the scraping member is located in front of the tooth tip, and the gap between the front surface of the combing member, the lower surface of the scraping member and the outer surface of the roller brush forms a suction negative pressure zone.

[0014] The surface cleaning device of the present invention has at least the following beneficial effects:

[0015] 1. The present invention provides a plurality of comb teeth on the combing member, and a gap is formed between two adjacent comb teeth. The comb teeth at least partially extend downward, so that the gap between the comb teeth is at least partially located between the dirt suction port and the roller brush to form a slit effect area. When the surface cleaning machine performs cleaning work, the roller brush rotates, the cleaning member contacts the surface to be cleaned for cleaning, and the dirt suction fan works at the same time, wherein most of the dirt or dirty liquid and entangled materials such as hair are sucked into the dirt suction port, and the combing member and the scraping member contact the roller brush in turn, and the dirt adhered to the cleaning member of the roller brush is removed by the comb teeth. The part of hair and other entanglements are peeled off and scraped off from the roller brush, and the scraping part is used to scrape and squeeze the cleaning part of the roller brush to scrape off the dirt and dirty liquid adhered to the cleaning part of the roller brush. The dirty liquid flows downward to the area where the gap between the comb teeth is located by gravity and the squeezing force of the scraping part. Under the guidance of the tooth grooves of the comb teeth, the liquid flow flushes the loosened hair and other entanglements near the guide section, and the dirty liquid continues to flow downward from the tooth grooves of the comb teeth to the gap between the comb teeth. While scraping the dirt, the suction fan works. When the airflow moves to the suction port, the two adjacent combs corresponding to the suction port are The gap between the teeth produces a slit effect, and the wind pressure in the slit effect area formed by the gap between the comb teeth increases, so that an unbalanced airflow is generated at the sewage suction port. The hair and other entanglements, dirt, and dirty liquid adhering to the roller brush that are scraped off by the scraping element and the comb teeth are smoothly sucked into the sewage suction port under the action of the larger wind pressure of the unbalanced airflow, thereby further improving the sewage suction effect. Even if there are larger solid particles with a size similar to the gap between the comb teeth, since the gap between the comb teeth is a through gap and the gap is connected to the sewage suction port, even if there are larger particles or The clumped tangled objects enter the gaps between the comb teeth, and under the action of greater wind pressure, some of the suspended comb teeth are deformed, thereby increasing the gaps between the comb teeth, and then larger particles or clumped tangled objects are sucked into the suction port through the gaps between the comb teeth by the greater suction force. Therefore, the accumulation of hair and solid dirt in the gaps between the comb teeth is avoided, and the cleaning effect of the scraper and comb teeth on the roller brush is improved, especially the stripping and suction effects on the tangled objects are better, and no dirt or tangled objects will remain on the comb teeth, thus bringing a good experience to customers.

[0016] 2. The effective area of ​​the slit effect zone is S, and the equivalent area of ​​the sewage suction port is S 0 , where 2≤S / S 0 ≤12. The gap between two adjacent comb teeth corresponding to the suction port can produce a lower effect, and the slit effect area is sufficient to increase the wind pressure and enhance the suction force. The suction force generated is sufficient to be greater than the adhesion of dirt, entangled objects or dirty liquid, thereby improving the suction efficiency and the suction effect, especially for lighter objects such as hair entanglements. When S / S 0 When S / S is less than 2, the suction force is insufficient and larger particles are not easy to pass through and are easily retained between the teeth. 0When it is greater than 12, although the slit effect is obvious, the wind pressure is greater, and the suction force is greater, which is beneficial to the treatment of dirt or hair entanglements adhered to the cleaning part of the roller brush scraped off by the comb teeth or the scraping parts, the combing part will also block the suction port too much, which is not conducive to the surface device to directly suck the larger particles of dirt or hair entanglements on the surface to be cleaned, but affects the normal suction process, and the customer experience is worse.

[0017] 3. The width of the comb teeth of the present invention is b, and the spacing between two adjacent comb teeth is L, wherein b>L. Under the action of the sewage suction fan, a slit effect is generated at the spacing between the two adjacent comb teeth through sections at the sewage suction port, and the wind pressure here is increased, which is conducive to the suction of dirt, dirty liquid, hair, etc. between the comb teeth. And the spacing L satisfies 0.7mm≤L<1.5mm, which ensures that the gap between the through sections of the comb teeth that block the sewage suction port is reasonable, and also ensures the area of ​​the slit effect area, and ensures that sufficient wind pressure can be generated here to enhance the suction force. The suction force generated is sufficient to be greater than the adhesion of dirt, entangled objects, or dirty liquid, and the clamping force of entangled objects or larger particles clamped in the spacing between the two comb teeth, so that it is more conducive to the dirt to smoothly pass through the gap between the comb teeth into the sewage suction port. When the spacing L is less than 0.7, the comb teeth are too dense, and it is difficult to produce a slit effect. At the same time, the through section of the comb teeth has a small deformation space when subjected to wind pressure, which is not conducive to the suction of dirty liquid, dirt, and entangled objects. When the spacing L is greater than 1.5, the number of teeth blocking the suction port per unit length is reduced, which reduces the scraping surface of the comb teeth per unit length, especially reducing the stripping effect on entangled objects. Although the overall suction force and suction area of ​​the floor brush are large, it will not cause the entrapment of larger particles of entangled objects. However, due to the large spacing L, the area of ​​the slit effect zone of the comb teeth is reduced, the wind pressure will be reduced exponentially, and the suction force will be reduced, which will cause the dirty liquid, dirt or entangled objects that are not conducive to the penetration section of the comb teeth to be quickly sucked away.

[0018] 3. The sewage suction port of the present invention is flat, and the top of the sewage suction port is not lower than the central axis of the roller brush, ensuring that the sewage suction port is large enough, thereby ensuring that the surface cleaning device can handle larger dirt or hair and other entanglements on the surface to be cleaned. The height of the gap covering the sewage suction port is h, and the height of the sewage suction port is H, wherein 0.2≤h / H≤0.25, ensuring that the length of the gap covering the comb teeth at the sewage suction port is sufficient, so that the wind pressure of the gap covering the sewage suction port is increased, so that the suction force generated by the increased wind pressure is sufficient to resist the adhesion of dirt or entanglements or dirty liquid in the gap, and the clamping force of entanglements or larger particles clamped in the gap between two comb teeth, so as to facilitate the dirt to smoothly pass through the gap between the comb teeth into the sewage suction port. When h / H is greater than 0.25, the gap between the comb teeth and the length of the comb teeth covering the suction port are large, which reduces the effective suction area of ​​the suction port. Although the slit effect is obvious, it solves the problem of sucking dirt or dirty liquid or entangled objects peeled off and scraped off the cleaning part of the roller brush by the scraping part and the comb teeth, but the larger dirt sucked from the surface to be cleaned by the surface cleaning machine will be blocked by the comb teeth and cannot enter the suction port, which brings a worse experience to customers. When h / H is less than 0.2, the gap between the comb teeth and the length of the comb teeth covering the sewage suction port are small. Although larger dirt sucked from the surface to be cleaned can be sucked into the sewage suction port, and hair and the like will not be entangled in the comb teeth, the comb teeth are not effective in peeling off the entangled materials on the cleaning part of the roller brush, so it is still possible that some entangled materials cannot be peeled off the cleaning part. In addition, since the length of the comb teeth covering the sewage suction port is small, the slit effect between the gaps between the comb teeth is weak, and therefore the wind pressure is small. Even if fewer and lighter entangled materials can enter the sewage suction port, the suction force generated by the wind pressure is not enough to overcome the adhesion of the granular dirt between the comb teeth between the through sections of the comb teeth, making it difficult to suck out small granular dirt.

[0019] 4. By extending the comb teeth at least partially into the bristles of the roller brush, the comb teeth are at least partially located below the central axis of the roller brush, and the front tooth surfaces of the comb teeth are extended downward along the outer circumference of the cleaning member, so that the comb teeth of the combing member can extend into the bristles of the cleaning member, and the front tooth surfaces of the comb teeth are in surface contact with the cleaning member of the roller brush, and the tooth tips of the comb teeth can extend into the bristles on the cleaning member and extend downward through the bristles, or the comb teeth of the combing member are all combing the bristles downward along the tangential direction of the cleaning member of the roller brush, which can not only effectively scrape and peel off the entanglements on the surface of the roller brush and the dirt hidden in the roots of the bristles, but also greatly reduces the probability of the tooth tips directly extending to the bristles of the comb teeth to form obvious tooth marks on the bristles, and at the same time will not increase the resistance to the rotation of the roller brush, but also reduces the occurrence of the problem of the drive motor driving the roller brush to rotate being blocked due to the increase in resistance.

[0020] 5. By making the combing part further include a connecting part that connects at least the upper part of the comb teeth, and the lower end of the connecting part is set lower than the top of the suction port, the effective passing area of ​​the airflow at the suction port is further reduced, and the wind pressure is further increased, so that the surface cleaning device has a better suction effect on the dirt or dirty liquid on the surface to be cleaned, especially for the large group of deformable dirt or lighter hair and other entanglements on the surface to be cleaned. At the same time, because the gap is set below the connecting part, the gap is completely located in the area where the suction port is located, so that the formed slit effect area is maximized, so that the gaps between the comb teeth are used to the maximum extent. The connecting portion is provided with a guide groove, which is arranged corresponding to the gap between the comb teeth, so that the guide groove has a good drainage effect on the gap flow of the liquid flowing to the downward through section, so that the liquid flow drives the entangled dirt or hair to flow downward to the gap more smoothly, not only can the dirt or hair and other entangled objects in the gap be quickly and smoothly flushed to the gap between the comb teeth, but at the same time, the guide groove blocks the sewage suction port to form a leeward area, and the negative pressure generated here is relatively large, so that the guide groove forms a narrow tube effect, and the dirty liquid scraped off by the scraping member generates a large water pressure in the guide groove, so that the dirt scraped off by the scraping member and attached to the roller brush can be flushed to the gap between the comb teeth. Since the gap is completely covered in the sewage suction port, the airflow can better produce the slit effect when running into the through groove, and the wind pressure is greater. Driven by the airflow with greater wind pressure, the dirty liquid flushed into the through groove carries the entangled objects such as dirt or hair and can pass through the through groove quickly into the sewage suction port.

[0021] 6. Compared with the combing member, the scraping member has stronger water and dirt scraping ability. Since the scraping member and the combing member are partially fitted together, they both conflict with the cleaning member. At the same time, since the front end of the scraping member is located in front of the tooth tips of the comb teeth and both conflict with the roller brush, when the suction fan is working, the air flow cannot pass through the gap between the front surface of the combing member, the lower surface of the scraping member and the outer surface of the roller brush in the area above the suction port. Therefore, these areas are leeward areas, and the leeward area forms a suction negative pressure area. A suction negative pressure zone is formed in the gap between the front surface of the combing member, the lower surface of the scraping member and the outer surface of the roller brush, and the scraping member squeezes and scrapes the cleaning member. Under the negative pressure environment, after the dirty liquid is scraped off, the suction negative pressure zone between the bottom of the scraping member and the front surface of the combing member gathers to a certain extent, generating a large water pressure, so that the liquid flow instantly rushes to the grooves between the comb teeth, and is divided into multiple liquid flows by the grooves of the comb teeth and enters between the grooves, so that the instantaneous water pressure between the grooves of the comb teeth is further increased. Therefore, under the action of the multiple liquid flows with increased water pressure, the entangled objects or dirt peeled off from the cleaning member by the comb teeth are flushed away. The liquid flow drives dirt, hair and other entangled objects to flow through the area where the front tooth surface of the comb teeth contacts the cleaning part line of the roller brush to the gap between the comb teeth at the sewage suction port. Since the comb teeth extend downward to at least partially block the sewage suction port, and a through ventilation gap is formed between the gaps between two adjacent comb teeth, a plurality of slit effect areas are formed in the gaps between the comb teeth at the sewage suction port. Under the action of the sewage suction fan, the wind pressure in the slit effect area increases due to the slit effect. Under the action of the larger wind pressure in the slit effect area, the liquid flow dispersed into multiple streams drives entangled objects such as hair, dirt particles, etc. to be forcefully sucked into the sewage suction port. Some hair may be entangled on the periphery of the comb teeth, and some small particles of dirt may also adhere to the gaps between adjacent comb teeth. However, under the high hydraulic pressure of the gaps between the comb teeth that are instantly divided into multiple small flows of larger hydraulic pressure, the hair and the dirt in the gaps are washed away at high speed to offset the adsorption force between the hair and the comb teeth. Under the high-pressure suction in the slit effect area formed by the gaps through the comb teeth of the sewage suction port, the sewage between the comb teeth will carry along the hair and other solid dirt along the gaps between the comb teeth and quickly be sucked away and enter the sewage suction port, thereby avoiding the accumulation of hair and other solid dirt in the gaps between the comb teeth, improving the cleaning effect of the scraping parts and comb teeth on the surface of the roller brush to ensure that it can clean the surface to be cleaned normally, ensuring that the roller brush continues to rotate and the cleaning work continues, reducing the probability of tooth marks on the surface of the cleaning parts of the roller brush, reducing the secondary pollution of the surface to be cleaned caused by the dirt of the cleaning parts themselves, thereby achieving a more thorough cleaning of the surface to be cleaned. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of a surface cleaning device according to a first embodiment of the present invention;

[0023] Figure 2Schematic diagram of a floor brush of the surface cleaning device

[0024] Figure 3 yes Figure 2 A cross-sectional view of the floor brush along the AA direction;

[0025] Figure 4 yes Figure 3 The enlarged view of point A in the middle;

[0026] Figure 5 This is an exploded view of the roller brush and roller brush cover installed on the floor brush;

[0027] Figure 6 yes Figure 2 Front view of the middle floor brush;

[0028] Figure 7 yes Figure 6 The enlarged view of point B in the middle;

[0029] Figure 8 It is a schematic diagram of the trajectory of the airflow passing through the gap between the comb teeth when the sewage suction fan is working;

[0030] Fig. 9 yes Figure 7 Cross-sectional view along CC direction;

[0031] Fig.10 / Fig.11 These are other embodiments of the connecting portion of the combing member;

[0032] Fig.12 is a cross-sectional view of the floor brush structure of the surface device described in the second embodiment;

[0033] Fig.13 yes Fig.12 The enlarged view of point D in the middle;

[0034] Fig.14 Fig.13 Enlarged view of G in the middle;

[0035] Fig.15 and Fig.16 is another embodiment of the combing member in the second embodiment;

[0036] Fig.17 It is a partial cross-sectional view of the floor brush of the surface plot device described in Example 3.

[0037] The figures are as follows:

[0038] 1. Machine body; 11. Handle; 13. Schematic position of the sewage suction fan; 2. Floor brush; 21. Upper shell; 22. Lower shell; 221. Front side; 222. First convex edge; 223. Second convex edge; 224. Bottom; 23. Accommodating chamber; 24. Suction port; 241. Top; 25. Suction hose; 26. Roller brush cover; 27. Roller brush chamber; 28. Floor scraper; 3. Clean water tank; 4. Roller brush; 41. Bristles; 42. Cleaning parts; 43. Roller; 44. First rotating roller; 45. Second rotating roller; 46. Support frame; 500. Suction load Pressure zone (liquid flow boosting zone); 5. Scraping piece; 51. Installation section; 52. Suspended section; 521. Front end; 53. Transition section; 54. Lower surface; 6. Combing piece; 61. Comb teeth; 611. Through section; 612. Guide section; 613. Gap; 614. Guide groove; 615. Slit effect zone; 616. Front tooth surface; 617. Rear tooth surface; 6171. First inclined surface; 6172. Second inclined surface; 618. Tooth tip; 62. Connecting part; 621. Drainage surface; 64. Fixed part; 7. Dirt bucket; 8. Water distribution piece; 9. Spacer area. DETAILED DESCRIPTION

[0039] It should be noted that, in the description of the present application, the terms "center", "upper", "lower", "top", "bottom", "vertical", "horizontal", "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are merely for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0040] The surface cleaning device of the present invention includes a handheld surface cleaning device, such as a floor scrubber, a vacuum cleaner, a fabric cleaning machine, etc., and also includes a self-propelled surface cleaning device, such as a sweeping and mopping robot, a sweeping robot, etc.

[0041] When a liquid flows in a tube, the flow rate increases when it passes through a narrow area. When air flows through narrow terrain on the ground, it is similar to the flow of liquid in a tube, and the flow rate will also increase. Because the gas is compressible, the density will also increase. The effect of this terrain canyon on the airflow is called the "narrow tube effect", also known as the "canyon effect". The slit effect in the present invention is the same as the canyon effect in daily geography. It refers to the wind sucked into the roller brush cavity from between the roller brush and the scraper strip of the floor brush. When it moves to the sewage suction port, it encounters the gap between the comb teeth that block the sewage suction port. Due to the narrow gap, the flow rate of the wind passing through the narrow gap is accelerated, and the wind pressure increases. The slit effect area of ​​the present invention refers to the area formed by the gap between two adjacent comb teeth set corresponding to the sewage suction port when the comb teeth partially block the sewage suction port. For example, there are 8 comb teeth blocking the sewage suction port, and there are 7 comb tooth gaps among the 8 comb teeth. The area formed by these 7 gaps is the slit effect area.

[0042] The roller brush of the present invention can be a single roller, a double roller or a crawler roller brush. In this embodiment, it is a single roller brush, the roller brush 4 is installed on the floor brush, the axis direction of the roller brush 4 is defined as the left-right direction, and the horizontal direction perpendicular to the axis of the roller brush 4 is defined as the front-back direction; during the rotation of the roller brush 4, from the left view, the roller brush 4 runs clockwise, that is, the roller brush rotates from bottom to top and then rotates backward, so that the floor brush moves backward. When the surface cleaning device is working, the clean water tank 3 supplies liquid to the roller brush, the roller brush rotates, the cleaning part and the bristles wipe the surface to be cleaned, the scraping part squeezes and scrapes the roller brush, and the dirty liquid and dirt on the bristles and / or the cleaning part are scraped off, the comb teeth scrape off the hair and other entanglements on the bristles and the cleaning part, and the dirt suction fan works to suck the dirty liquid and dirt on the surface to be cleaned, as well as the dirty liquid and dirt scraped off from the roller brush through the dirt suction port.

[0043] Embodiment 1:

[0044] As a surface cleaning device with good suction power described in the present invention, Figures 1 to 11As shown, it includes a floor brush 2 that can move on the surface to be cleaned, and a body 1 hinged to the floor brush 2, wherein the rear portion of the floor brush 2 is pivotally connected to the lower portion of the body 1, and a driving handle 11 is provided at the upper end of the body 1. The body 1 is provided with a dirt bucket 7, a clean water tank 3, and a dirt suction fan for sucking dirty liquid and / or dirt into the dirt bucket 7. Reference numeral 13 is a schematic position of the dirt suction fan, and the dirt suction fan is located above the dirt bucket 7 and on the same side as the dirt bucket 7. A dirt suction port 24 is provided on the floor brush 2, and the floor brush 2 includes an upper shell 21 and a lower shell 22. The upper shell 21 is snapped onto the lower shell 22 to form a accommodating chamber 23. A floor scraper 28 is also provided on the front side of the bottom 222 of the lower shell 22, which is tilted downward. In this embodiment, the floor scraper 28 is made of hard rubber. The sewage suction port 24 is arranged on the front side 221 of the lower shell 22. The sewage suction port is rectangular and its four corners are rounded. A sewage suction hose 25 connected to the sewage suction port 24 is arranged in the accommodating chamber 23. The sewage suction hose 25 passes upward from the rear side of the accommodating chamber 23 and is connected to the sewage suction pipe (not shown in the figure) on the sewage bucket 7. The floor brush 2 is also provided with a roller brush 4 for cleaning the surface to be cleaned and a scraper 5 and a combing member 6 for cleaning the roller brush 4. The scraper in this embodiment is a metal scraper. Figure 3 and Figure 4As shown, the roller brush 4 includes a first rotating roller 44, a second rotating roller 45, a support frame 46 connecting the first rotating roller 44 and the second rotating roller 45, and a cleaning member sleeved on the outer surface of the first rotating roller 44 and the second rotating roller 45, and the cleaning member includes a cleaning member 42 and bristles 41. The diameters of the first rotating roller 44 and the second rotating roller 45 are equal, the scraping member 5 is arranged above the central axis EF of the first rotating roller 44, and the suspended section 52 of the scraping member 5 is arranged to be tilted downward, the roller brush 4 is arranged on the front side of the floor brush 2, and the front side of the floor brush 2 is also provided with a roller brush cover 26 covering the roller brush 4, the front side surface 221 of the upper shell 21 and the lower shell 22 and the roller brush cover 26 form a roller brush chamber 27 for installing the roller brush 4, the scraping member 5 and the combing member 6 are arranged above the suction port 24 in sequence, and a water separation member 8 is also provided above the scraping member 5, and a plurality of comb teeth 61 are provided on the combing member 6, and the comb teeth 61 are provided on the combing member 6. The comb teeth 61 of the cleaning element 6 at least partially extend into the bristles of the brush 41 of the roller brush 4. The comb teeth 61 include a through section 611 and a guide section 612. The comb teeth 61 include a rear tooth surface 617 facing away from the roller brush 4 and a front tooth surface 616 arranged toward the roller brush. When viewed from the front side of the roller brush 4 toward the sewage suction port, the comb teeth 61 extend downward and at least partially block the sewage suction port 24, so that the effective passing area of ​​the airflow when it moves to the sewage suction port becomes smaller. Compared with the sewage suction port not blocked by the comb teeth, the wind pressure increases, and most of the dirty liquid and dirt sucked from the surface to be cleaned to the sewage suction port, as well as entangled objects such as hair, can enter the sewage suction port more easily. There is a gap 613 between the two adjacent through sections that passes through the front tooth surface 616 and the rear tooth surface 617. The gap 613 between the two adjacent through sections 611 forms a slit effect area 615 corresponding to the sewage suction port 24, such as Figure 7 and Figure 8 As shown, when the sewage suction fan is working, the wind pressure at the gap 613 increases and the wind speed also increases, while the wind pressure near the sewage suction port that is not blocked by the comb teeth is smaller than here, resulting in an unbalanced airflow at the sewage suction port. The hair and other entangled objects, dirt, and dirty liquid in the gap between the comb teeth are smoothly sucked into the sewage suction port at a faster wind speed under the action of the larger wind pressure of the unbalanced airflow, thereby further improving the sewage suction efficiency. Even if there are larger solid particles with a size similar to the gap between the comb teeth, since there is a gap between the front tooth surface and the rear tooth surface between the comb teeth, and the gap is connected to the sewage suction port, even if these larger particles or clumped entangled objects enter the gap of the through section of the comb teeth, the larger particles or entangled objects will squeeze the comb teeth under the action of greater wind pressure, causing the through section of the comb teeth to deform, thereby increasing the gap between the comb teeth here, reducing the contact area, and then reducing the adhesion, making it easier to be sucked into the sewage suction port by the greater suction force. Therefore, the accumulation of hair and solid dirt in the gap between the comb teeth is avoided, especially for the stripping and suction of entangled objects, the effect is better, and there will be no dirt or entangled objects remaining on the comb teeth, which brings a good experience to customers.

[0045] like Figure 3 and Figure 4 As shown, the front side of the bottom 224 of the lower shell 22 is also provided with a floor scraper 28 in contact with the surface to be cleaned, and the floor scraper 28 is located below the sewage suction port 24 and a sewage suction nozzle 29 is formed between the roller brush 4, and the downwardly extending portion of the combing member 6 is located between the sewage suction port 24 and the sewage suction nozzle 29, and the combing member 6 has a guide surface inclined toward the sewage suction nozzle 29, and the guide surface is the rear tooth surface 617 of the comb teeth. The comb teeth 61 extend downward and partially block the sewage suction port 24. When the airflow reaches the sewage suction port 24 blocked by the comb teeth 61, the passing area of ​​the airflow suddenly becomes smaller, so the wind pressure increases, and the suction force near the sewage suction port 24 blocked by the comb teeth 61 increases. Under the increased suction force and the guiding effect of the combing member, the retention and adhesion of dirty liquid and dirt at the sewage suction port 24 are reduced. Most of the dirty liquid and dirt can enter more effectively and quickly when moving to the sewage suction port blocked by the comb teeth, and continue to be sent upward to the sewage holding bucket, thereby improving the sewage suction efficiency.

[0046] like Figures 3 to 7As shown, the front side surface 221 of the lower shell 22 is provided with a first convex edge 222 and a second convex edge 223 protruding forward, the sewage suction port 24 is arranged on the front side surface 221 between the first convex edge 222 and the second convex edge 223, the combing member 6 includes comb teeth 61, a fixing portion 64 and a connecting portion 62 connecting the fixing portion and the comb teeth, the comb teeth 61 are arranged to protrude downward from the connecting portion 62, the longitudinal section of the comb teeth is a triangle or a nearly triangle, and a guide groove 614 is further provided between the two adjacent guide sections 612, the guide groove 614 is provided to guide the comb teeth 611. The flow groove 614 is arranged on the connecting part, and the guide section 612 is connected as a whole through the connecting part, that is, the guide groove 614 is opened on the connecting part 62 between two adjacent guide sections 612, and the guide groove 614 extends upward to the lower surface of the scraping section 5, that is, the guide groove 614 extends from the lower end of the connecting part 62 to the top of the connecting part 62. Therefore, the comb teeth 61 extend upward along the front surface of the connecting part 62 to the top of the connecting part, and the thickness of the comb teeth gradually decreases to be flush with the front end of the connecting part. The guide groove 614 is the tooth groove of the two adjacent comb teeth 61, and the section from the bottom end of the connecting portion 62 to the tooth tip 618 is the through section. The guide groove 614 is arranged corresponding to the gap 613 of the through section 611. The scraper 5 includes a mounting section 51 and a suspended section 52. The mounting section 51 is arranged above the fixing portion 64, and the lower surface of the mounting section 51 and the upper surface of the fixing portion 64 are fitted together. The top surface of the connecting portion 62 is at least partially fitted with the suspended section 52, and the front end 521 of the suspended section 52 protrudes forward from the connecting portion 62. A water diversion member 9 is arranged above the scraper 5, and the mounting section 51 and the fixing portion 64 of the scraper 5 are fitted and clamped between the first convex edge 223 and the lower surface of the water diversion member 9. The comb teeth 61 include a rear tooth surface 617 away from the roller brush 4 and a front tooth surface 616 arranged toward the roller brush, the front tooth surface and the rear tooth surface are rectangles extending from the connecting portion to the tooth tip, the rear tooth surface 617 is inclined toward the direction of the sewage suction nozzle 29, the width of the comb teeth 61 is b, the tooth width b is the width of the rectangle, the distance between the gaps 613 of two adjacent comb teeth 61, that is, the spacing is L, that is, the groove width of the tooth groove and the distance between the gaps, that is, the spacing L are equal, wherein b>L, and the spacing L satisfies 0.7mm≤L<1.5mm, thereby ensuring that the gap between the through sections of the comb teeth at the sewage suction port is reasonable, thereby ensuring the area of ​​the slit effect zone, ensuring that sufficient wind pressure can be generated here to enhance the suction force, and the suction force generated is sufficient to be greater than the adhesion force of dirt or entangled objects or dirty liquid, and the clamping force of entangled objects or larger particles clamped in the spacing between the two comb teeth, thereby making it more conducive for dirt to pass through the gap between the comb teeth smoothly into the sewage suction port. The effective area of ​​the slit effect zone is S, and the equivalent area of ​​the sewage suction port is S 0 , where 2≤S / S 0≤12. The gap between two adjacent comb teeth corresponding to the sewage suction port can produce a lower effect, and the slit effect area is sufficient to increase the wind pressure and enhance the suction force. The suction force generated is sufficient to be greater than the adhesion of the dirt or entangled objects or dirty liquid, thereby improving the suction efficiency and the suction effect, especially for the suction effect of lighter objects such as hair entanglements. In this embodiment, S / S 0 =10. The height of the through section 611 blocking the sewage suction port 24 is h, the height of the gap covering the sewage suction port is h, and the height of the sewage suction port is H, wherein 0.2≤h / H≤0.25 ensures that the length of the gap of the comb teeth blocking the sewage suction port is sufficient to increase the wind pressure of the gap blocking the sewage suction port, so that the suction force generated by the increased wind pressure is sufficient to resist the adhesion of dirt, entangled objects or dirty liquid in the gap, and the clamping force of entangled objects or larger particles clamped in the gap between two comb teeth, so as to facilitate the dirt to smoothly pass through the gap of the comb teeth into the sewage suction port. In this embodiment, the value of h / H is 0.23. The height of the through section 611 that blocks the sewage suction port 24 is h, that is, the length of the gap between the comb teeth covering the sewage suction port is h, wherein 0.7mm<h≤3.5mm, which ensures that the length of the through section of the comb teeth that blocks the sewage suction port is sufficient to increase the wind pressure of the through section that blocks the sewage suction port, so that the suction force generated by the increased wind pressure is sufficient to resist the adhesion of dirt or entangled objects or dirty liquid in the gap, and the clamping force of entangled objects or larger particles clamped in the distance between two comb teeth, thereby making it easier for dirt to pass through the gap between the comb teeth and enter the sewage suction port. In this embodiment, L=1.2mm, h=3mm. The comb teeth formed by this scheme have a reasonable length. The point where the tooth tip 618 is tangent to the cleaning member 42 of the roller brush 4 is also slightly farther from the central axis EF of the roller brush, that is, the tooth tip of the comb teeth can contact the cleaning member earlier, and the stripping effect on the entanglement on the roller brush is better. The comb teeth extend into the bristles for a long time, and the contact area between the comb teeth and the bristles is large. No obvious tooth marks will be produced on the cleaning member, and the comb teeth have little resistance to the movement of the roller brush. In addition, the length of the comb teeth covering the suction port is sufficient, and it is easier to produce a slit effect. It is not only beneficial for the surface cleaning device to suck away larger garbage from the surface to be cleaned, but also a strong slit effect can be formed at the place where the comb teeth cover the suction port, thereby generating a strong suction force, and the cleaning and suction effect of a small part of the dirt or dirty liquid or entanglement scraped off by the comb teeth and the scraping member is also better.

[0047] The comb teeth 61 are at least partially located below the central axis EF of the roller brush 4, and the front tooth surface 616 of the comb teeth 61 is extended downward along the periphery of the cleaning member 42, so that the tooth tips of the comb teeth can extend into the bristles on the cleaning member and extend downward through the bristles, or the comb teeth of the combing member can comb the bristles downward along the periphery of the cleaning member of the roller brush, which can not only effectively scrape and peel off the entanglements on the surface of the roller brush and the dirt hidden in the roots of the bristles, but also reduce the probability of the tooth tips directly extending to the bristles of the comb teeth to form obvious tooth marks on the bristles, and at the same time will not increase the resistance of the roller brush to rotate, and also reduce the probability of the drive motor that drives the roller brush to rotate being blocked due to the increase in resistance. Figure 4As shown, the angle a of the front tooth surface 616 tilted downward along the top 241 of the dirt suction port 24 is 80°≤a<90°, so that the tip of the comb teeth can extend into the bristles, and the comb teeth can comb the bristles downward. The length of the comb teeth that can extend into the bristles of the cleaning member is reasonable, so that the comb teeth can effectively scrape off the hair and other entanglements that are about to be entangled on the roller brush, and will not conflict with the cleaning member too much or even form deeper tooth marks. The rear tooth surface 617 is tilted downward along the connecting portion 62. The rear tooth surface 617 of the comb teeth is formed by connecting a first inclined surface 6171 and a second inclined surface 6172. The first inclined surface 6171 is connected to the connecting portion 62. The inclination angle of the first inclined surface 6171 is β, where a≤β≤90°. Here, the inclination angle β of the first inclined surface 6171 is greater than or equal to the inclination angle of the front tooth surface 616, and the maximum is 90°. The angle between the second inclined surface 6172 and the horizontal plane is θ, so the inclination angle of the second inclined surface is θ, and the inclination angle θ of the second inclined surface 6171 satisfies 30°≤θ≤35°. In this embodiment, the inclination angle of the rear tooth surface 617 refers to the inclination angle θ of the second inclined surface 6172. Therefore, under the guidance of the inclination angle θ of the second inclined surface 6172, it is easier and more difficult for the dirty liquid and dirt to move smoothly to the vicinity of the suction port. This angle just meets the angle formed by the suction hose passing through the accommodating chamber from the suction port and connecting with the suction pipe on the sewage bucket from the rear part of the accommodating chamber upward, so the guiding effect is good. The first inclined surface 6171 plays a good blocking and diverting role when the liquid flow after passing over the comb teeth 61 is large and flows back, especially for the liquid flow that is squeezed and surges up after entering the space between the comb teeth and the sewage suction port along the first inclined surface, it has a good blocking and diverting effect, so that the liquid flow flushes the back of the comb teeth and then turns to the sewage suction port again. The setting of the first inclined surface and the second inclined surface provides a buffer and diverting space for the liquid flow, so that the dirty liquid and dirt can enter the sewage suction port more smoothly and move along the sewage suction port and the sewage suction hose to the sewage suction pipe and enter the sewage storage bucket, which not only improves the suction efficiency, but also improves the sewage suction effect. In this embodiment, the inclination angle a of the front tooth surface is 84°, the inclination angle θ of the second inclined surface is 33°, and the inclination angle β of the first inclined surface is 90°. The tooth thickness of the comb teeth gradually decreases from bottom to top, and the tooth groove gradually becomes shallower from top to bottom, which enhances the diversion effect, and at the same time allows the comb teeth to better extend into the comb hair and generate less resistance to the movement of the roller brush, and ensures that the tooth groove close to the scraper is shallower. Since the water pressure and negative pressure here are the smallest, the tooth groove is shallow, and the space for dirty liquid or dirt to remain is small, so a large amount of dirt or dirty liquid will not remain here. The bottom surface of the tooth groove is an arc surface, and the center of the arc surface is located on the side where the roller brush is located. With such a structure, the diversion effect is better, so that the dirty liquid or dirt runs more smoothly in the tooth groove, and the probability of accumulation is reduced.

[0048] like Figure 4As shown, the suspended section 52 of the scraping member 5 is in conflict with the cleaning member 42 of the roller brush 4, the front tooth surface 616 of the comb tooth 61 is in conflict with the wetted bristles, and the tangent line formed by the tooth tip 618 of the comb tooth 61 and a certain point on the outer periphery of the cleaning member 42 of the roller brush 4 is MN, and the tangent line MN is located in the front tooth surface 616, so that the comb teeth 61 of the combing member 6 can extend into the bristles 41 of the cleaning member 42, the contact surface of the combing member 6 and the cleaning member 42 of the roller brush 4 is reasonable, and the tooth tip 618 will not directly extend forward to the bristles of the roller brush. The bristles intersect and form line contact with them, which reduces the chance of severe friction or even obvious tooth marks caused by line contact between the tooth tips and the bristles, so that the comb teeth 61 of the combing member 6 comb the bristles 41 downward along the tangent direction of the cleaning member 42 of the roller brush 4 or in a direction parallel to the tangent, which can effectively scrape and peel off the entanglements on the surface of the roller brush 4 and the dirt hidden at the roots of the bristles 41 without increasing the resistance to the rotation of the roller brush, greatly reducing the problem of stalling of the drive motor that drives the roller brush to rotate due to the increase in resistance.

[0049] When the dirt suction fan is working, the airflow passes through the dirt suction port to form a wind pressure zone. The area between the front surface of the combing member 6 and the lower surface 54 of the scraping member 5 located above the dirt suction port and the roller brush does not correspond to the dirt suction port and is filled with bristles. The airflow cannot pass through and reach it, so a suction negative pressure zone 500 is formed in this area. Fig. 9As shown, the scraping member 5 squeezes and scrapes the cleaning member 42. Under the negative pressure environment, after the dirty liquid is scraped off, the suction negative pressure area between the bottom of the scraping member 5 and the front surface of the combing member 6 gathers to a certain extent, generating a large water pressure, so that the liquid flows to the guide section of the comb teeth, and is divided into multiple liquid flows by the guide section of the comb teeth and enters between the guide sections, so that the instantaneous water pressure between the guide sections of the comb teeth is further increased. Therefore, under the action of the multiple liquid flows with increased water pressure, the entangled objects or dirt peeled off from the cleaning member by the comb teeth are washed away. The liquid flow drives dirt, hair and other entangled objects to flow through the area where the front tooth surface of the comb teeth is in line contact with the cleaning part of the roller brush to the through section at the suction port, thereby ensuring that no entangled objects remain in the gaps between the comb teeth. This not only solves the problem of the roller brush being entangled and the problem of hair and other entangled objects being entangled between the gaps between the comb teeth, but also enables dirty liquid, dirt, hair and other entangled objects to quickly flow to the gaps between the comb teeth at the suction port, and be smoothly sucked into the suction port by the greater wind pressure, thereby improving the suction efficiency and the suction effect. In this embodiment, the mounting section 51 is arranged above the central axis EF of the roller brush 4, and a transition section 53 is also provided between the mounting section 51 and the suspended section 52. The suspended section 52 is arranged to be tilted downward along the diameter of the roller brush 4 and to conflict with the cleaning part, so that the transition section 53 smoothly connects the mounting section 51 and the suspended section 52, and the fixing portion 63 of the combing part 6 is arranged to fit the mounting section. The suspended section 52 is at least partially arranged above the comb teeth 61, and the front end 521 of the suspended section 52 of the scraping member 5 is located in front of the tooth tip 618 of the through section 611, and the tooth tip 618 is tangent to the cleaning member 42 of the roller brush 4. The area between the partial lower surface 54 of the scraping member 5, the partial front surface of the combing member 6 and the outer surface of the roller brush 4 forms a leeward area where airflow cannot pass through, and this area forms a suction negative pressure area 500. Since the comb teeth 61 and the guide groove 614 extend upward to the scraping member 5, the front surface of the combing member 6 includes the front tooth surface 616 of the comb teeth 61 and the guide groove 614, and the guide groove 614 is formed by the gap 613 extending upward through the connecting portion 62 to the lower surface of the scraping member 5. Therefore, in this embodiment, the front tooth surface 616 of the comb teeth, the guide groove 614, the lower surface 54 of the scraping section 5 and the outer surface of the roller brush 4 form a suction negative pressure area. When the surface cleaning device is cleaning, the clean water tank supplies water to the roller brush or the surface to be cleaned, the water enters the water supply port on the floor brush from the water divider, and flows out to the roller brush through the water supply port, the roller brush is wetted, and the roller brush rotates to clean the surface to be cleaned, and at the same time the sewage suction fan is started, the floor scraper strip scoops up the dirt and dirty liquid on the surface to be cleaned, and under the influence of the rotation of the roller brush, the gap between the floor scraper strip and the roller brush forms a sewage suction nozzle, and under the influence of the rotation of the roller brush, the scooped dirt and dirty liquid are sucked into the suction nozzle, and move toward the sewage suction port and enter the sewage suction port under the guidance of the inclined rear tooth surface of the comb teeth, at this time, a part of the dirty liquid and dirt are absorbed by the cleaning member and bristles on the roller brush or driven to move upward with the roller brush, and the combing member contacts the roller brush,The tooth tips are tangent to the cleaning member of the roller brush, so that the comb teeth extend into the bristles of the roller brush, and the comb teeth are used to peel off and scrape off the dirt and hair on the cleaning member. Then the roller brush continues to rotate to the scraping member, and the scraping member is used to scrape and squeeze the cleaning member of the roller brush to scrape off the dirt and dirty liquid on the cleaning member of the roller brush. At the same time, the entangled materials scraped off by the comb teeth are continued to be scraped by the scraping member, and a small amount of entangled materials that are not completely peeled off are completely peeled off and fall with the liquid flow. At the same time, since the front end of the scraping member is located in front of the tooth tips of the penetration section, the tooth tips of the comb teeth are tangent to the cleaning member of the roller brush, the comb teeth extend into the bristles, and the front surface of the comb teeth is inclined, and the inclination direction of the front of the comb teeth coincides with the tangent formed by the tangent point. When the suction fan is working, the front surface of the combing member and the scraping member The gap between the lower surface and the outer surface of the roller brush is located above the suction port and the airflow cannot pass through it. Therefore, these areas are leeward areas, and the leeward areas form negative pressure areas for the airflow. The gap between the lower surface 54 of the suspended section, the front tooth surface 616 of the comb teeth 61, and the guide groove 614 and the outer surface of the roller brush forms a suction negative pressure area for the airflow. The scraping member squeezes the scraping cleaning member. Under the negative pressure environment, after the dirty liquid is scraped off, the suction negative pressure area between the bottom of the scraping member and the front surface of the combing member gathers to a certain extent, generating a large water pressure, so that the dirty liquid carries with it the entangled objects such as hair that are completely peeled off by the scraping member, and the dirt, under the action of the large water pressure formed by gravity and the squeezing force of the scraping member, rushes to the area where the guide section of the comb teeth is located, and is divided into multiple strands by the guide section of the comb teeth. The liquid flows into the guide grooves between the guide sections. Under the guidance of the guide sections of the comb teeth, the liquid flows with dirt, hair and other entanglements into the guide grooves between the guide sections. Since the guide grooves form narrow tubes, the instantaneous water pressure in the guide grooves is further increased and the flow rate is accelerated. Therefore, under the action of multiple liquid flows with increased water pressure, the entanglements or dirt peeled off from the cleaning parts by the comb teeth are washed away. The liquid flow washes the dirt near the guide section, the loosened hair and other entanglements downward and moves to the gap of the through section of the comb teeth. Under the action of the sewage suction fan, the gap between the two adjacent through sections forms a slit effect area at the sewage suction port, which increases the wind pressure in the instantaneous slit effect area, and generates an unbalanced airflow at the sewage suction port. The hair and other entanglements, dirt and dirty liquid are unbalanced in the unbalanced airflow. The dirt and liquid on the surface to be cleaned are sucked into the dirt suction port smoothly under the action of the large wind pressure of the airflow, so that not only the dirt and dirty liquid on the surface to be cleaned are sucked into the dirt suction port, but also the dirty liquid, dirt and entangled objects adhering to the contaminated roller brush are scraped off and sucked into the dirt suction port, and the roller brush continues to rotate, thereby further cleaning the surface to be cleaned. Such a surface cleaning device can clean the dirt, dirty liquid and entangled objects such as hair on the surface to be cleaned more cleanly, and at the same time, it can also clean the roller brush more cleanly, so that each time the roller brush contacts the surface to be cleaned, it is also cleaner, and no secondary pollution will be generated. The structure of the comb teeth cooperates with the scraping piece, which has a good effect of stripping off entangled objects such as hair, avoiding the entanglement of entangled objects such as hair on the roller brush. At the same time, the suction effect of entangled objects such as hair is significantly improved, and the dirt suction efficiency is high.Therefore, the overall cleaning effect of the surface cleaning device is greatly improved and the cleaning efficiency is increased.

[0050] Of course, it is understandable that the sewage suction fan and the battery pack can also be installed in a shell to form an independent power source system 12, and the power source system 12 can be detachably installed on the fuselage 1, and the shell of the power source system 12 is provided with an air inlet duct and an air outlet duct corresponding to the sewage suction fan, the air inlet duct is connected with the sewage bucket on the fuselage, the sewage bucket is detachably installed on the fuselage, and the fuselage is provided with a limiting surface for limiting the barrel wall of the sewage bucket, and a gap is formed between the limiting surface and the sewage bucket, and an exhaust port is provided on the fuselage, and the air outlet duct is connected with the inside of the fuselage to discharge the air discharged by the sewage suction fan through the exhaust port provided on the fuselage, and the exhaust port is connected with the limiting surface and the sewage bucket to form a gap, so that the wind is discharged from the fuselage from the gap between the two; or, the clean water tank can also be arranged on the floor brush and located in the accommodating cavity; the bottom surface of the tooth groove can also be composed of an inclined surface with a low middle and high front and rear sides; or, the bottom surface of the tooth groove can be a downwardly convex curved surface, such as Fig.10 As shown; or the bottom surface of the tooth groove is an arc surface, and the center of the arc surface is located above the tooth groove on the side where the floor brush is located, such as Fig.11 As shown, the lowest point of the bottom surface of the tooth groove is flush with the top surface of the sewage suction port; such technical solutions that do not deviate from the concept of the present invention are also within the protection scope of the present invention, and will not be given one by one here.

[0051] Embodiment 2:

[0052] The difference between this embodiment and the first embodiment is that the roller brush is a single roller brush and the structure of the comb teeth is different.

[0053] As the surface cleaning device described in the present invention, Figure 12 to Figure 14 As shown, the roller brush 4 includes a hollow roller 43 and a cleaning member shielded on the outer surface of the roller 43, the cleaning member includes bristles 41 and a cleaning member 42. In this embodiment, a transition section 53 is further provided between the mounting section 51 and the suspended section 52. The mounting section 51 is provided above the central axis EF of the roller brush 4, the suspended section 52 is provided to coincide with the central axis EF of the roller brush, the connecting portion 62 of the combing member 6 is provided to fit the mounting section, the transition section 53 smoothly connects the mounting section 51 and the suspended section 52, the suspended section 52 is at least partially provided above the comb teeth 61, the suspended section 52 is located above the central axis EF of the roller brush 4, and is provided to be parallel to the central axis EF of the roller brush 4. Fig.14As shown, the portion between J1 and J2 is the guide section of the comb teeth, and the portion between J2 and J3 is the through section of the comb teeth. The lower end of the connecting portion 62 is lower than the upper end of the sewage suction port 24 so that the comb teeth 61 at least partially cover the sewage suction port 24. A guide groove 614 is provided at the lower end of the connecting portion 62 between two adjacent guide sections 612, and the guide groove 614 is formed by the gap 613 extending upward along the connecting portion 62. The through section 611 is arranged at the lower part of the comb teeth 61. Since the tooth groove, i.e., the guide groove 614, does not extend to the scraping member, but extends to the front surface of the combing member 6, that is, the comb teeth 61 are not all arranged on the front surface of the combing member 6, but the connecting portion 62 of the combing member 6 extends forward to the top of the comb teeth 61 and fits with the suspended section 52 of the scraping member 5. The comb teeth and the suspended section 52 of the scraping member 5 are connected by the connecting portion 62. The front side surface of the connecting portion 62 forms a drainage surface for guiding the liquid flow downward. Therefore, the front surface of the combing member 6 in this embodiment includes a drainage surface 621 formed by the front side surface of the connecting portion 62, the front tooth surface 616 of the comb teeth 61, and the bottom surface of the guide groove 614. The area between the partial lower surface 54 of the scraping member 5, the front surface of the combing member 6, the guide groove 614 and the outer surface of the roller brush forms a leeward area that the airflow cannot pass through. This area forms a suction negative pressure area 500. Fig.14 As shown, the suction negative pressure area of ​​this embodiment is formed by the lower surface 54 of the suspended section 52, the drainage surface 621, the front tooth surface 616 of the comb teeth 61, and the gap between the bottom surface of the guide groove 614 and the outer surface of the roller brush. The liquid flow formed by the dirty liquid squeezed and scraped off by the scraper bar passes through the drainage surface, carrying the dirt and / or entangled materials peeled off from the roller brush by the scraper bar to the comb teeth, and then is washed by the wind flow in the guide groove. Since the drainage area and the guide groove are leeward areas where the airflow cannot pass, a suction negative pressure area is formed. Therefore, the water pressure of the liquid flow in the drainage area is increased. When passing through the narrow area of ​​the guide groove, a narrow tube effect occurs, so the water pressure increases instantly, which accelerates the liquid flow carrying the dirt and / or entangled materials to flow through the guide groove of the guide section, and smoothly enters the gap of the through section, forming a slit effect between the gaps of the comb teeth at the corresponding sewage suction port. Therefore, a slit effect area is formed between the gaps of the comb teeth at the corresponding sewage suction port. Under the action of the sewage suction fan, the wind pressure in the slit effect area increases, the wind speed increases, and the suction force increases. The liquid flow carries the dirt and / or entangled materials to the slit effect area and is quickly sucked into the sewage suction port.

[0054] like Fig.14As shown, the rear tooth surface 617 of this embodiment is tilted downward along the connecting portion 62, and the angle between the rear tooth surface and the horizontal plane is θ, where θ is the angle of inclination of the rear tooth surface, 30°≤θ≤35°. Under the guiding effect of the inclination angle θ of the rear tooth surface, it is easier and more difficult for the dirty liquid and dirt to move smoothly to the vicinity of the suction port. This angle just matches the angle formed by the suction hose passing through the accommodating cavity from the suction port and connecting with the suction pipe on the dirt bucket from the rear part of the accommodating cavity upward, so the guiding effect is good, so that the dirty liquid and dirt can enter the suction port more smoothly and move along the suction port and the suction hose to the suction pipe and enter the dirt bucket, which not only improves the suction efficiency, but also improves the suction effect. In this embodiment, a=83°, θ=32°. In this embodiment, the tooth width b of the comb teeth is 1.5 mm, and the spacing L between the two comb teeth is 1 mm, which ensures that the gap between the through sections of the comb teeth that block the sewage suction port is reasonable, and also ensures the area of ​​the slit effect zone, ensuring that sufficient wind pressure can be generated here to enhance the suction force. The suction force generated is sufficient to be greater than the adhesion of dirt or entangled objects or dirty liquid, and the clamping force of entangled objects or larger particles clamped in the spacing between the two comb teeth, so as to facilitate the dirt to smoothly pass through the gap between the comb teeth into the sewage suction port. The height of the comb teeth blocking the sewage suction port downward is h = 1 mm, and the effective area S of the slit effect zone is equivalent to the equivalent area S of the sewage suction port. 0 The ratio of is 2, and the ratio of h / H is 0.2. The comb teeth formed by such a scheme are small, so no obvious tooth marks are generated on the cleaning member, and the movement resistance of the roller brush is also small. Moreover, the length of the comb teeth is sufficient to extend into the bristles to handle the entangled objects, and the length of the dirt suction port is also small. Therefore, there is little hindrance for the surface cleaning device to suck away larger dirt from the surface to be cleaned. Not only can the larger garbage on the surface to be cleaned be handled, but also a certain slit effect can be formed at the dirt suction port, and the cleaning and suction effect of the small part of the dirt or dirty liquid or entangled objects scraped off by the comb teeth and the scraping member is also good.

[0055] Of course, it is understandable that we can also use such a combing member, the bottom surface of the groove of the tooth groove is not higher than the top surface of the suction port, such as Fig.15 As shown, the bottom surface of the tooth groove is a downward curved arc surface; or, the combing member includes a fixing portion, a connecting portion and comb teeth, and the comb teeth only include a through section without a guide section, such as Fig.16As shown, of course, there is no guide groove on the connection part, the front end of the connection part extends forward, and its top surface is in contact with the suspended section of the scraper, the front end of the suspended section of the scraper protrudes from the front end of the connection part, and the front surface of the connection part forms the comb teeth and the drainage surface of the scraper, and the tooth grooves of the comb teeth are arranged horizontally, the groove bottom surface of the tooth grooves is a plane, and the groove bottom surface of the tooth grooves of the comb teeth is arranged flush with the upper top surface of the suction port. As long as this comb tooth part blocks the suction port, and the gap between the comb teeth can form a slit effect, it can play a good role in handling entanglements such as hair, and can generate increased wind pressure to better suck entanglements, dirty liquids and dirt into the suction port, and the technical solutions that do not deviate from the concept of the present invention to improve the suction effect are all within the protection scope of the present invention, and no examples are given here.

[0056] The other structures and beneficial effects of this embodiment are consistent with those of the first embodiment and will not be described in detail here.

[0057] Embodiment three:

[0058] The difference between this embodiment and the second embodiment lies in the different structures and installation positions of the scraping member and the combing member.

[0059] In this embodiment, the scraper 5 only includes a suspended section 52 and a mounting section 51, but does not include a transition section. A spacing area 9 is provided between the combing member 6 and the scraper 5, so that the dirt scraped by the scraper flows through the spacing area 9 and the tooth grooves in sequence. Fig.17 As shown, the combing member 6 is not fitted with the scraping member, a slot is provided on the first protrusion 222, the combing member 6 is arranged in the slot, and the scraping member 5 is arranged above the first protrusion 222 and located on the water dividing plate 8, so as to be clamped by the first protrusion 222 and the water dividing plate 8, and the front side surface of the first protrusion forms a spacing area 9 between the combing member and the scraping member. The gap between the spacing area and the outer surface of the roller brush is larger, and the dirty liquid and dirt or hair and other entanglements scraped off from the scraping piece have more buffer space, so that the dirty liquid, dirt, etc. can rely on gravity to wash the hair and other entanglements to the combing piece position, so that the hair and other entanglements pass through the gap between the comb teeth again into the suction port. At the same time, because the surface cleaning device is provided with a suction fan, the suction fan is working, and the spacing area 9 is more likely to form a negative pressure, so that the water pressure of the liquid flow in this area is increased, and it is easier to move downward to the guide groove and form a narrow tube effect in the guide groove. The water pressure in the guide groove is further increased, and the flow rate is increased, so that the dirty liquid carrying dirt and hair and other entanglements can easily pass through the guide groove, smoothly enter the gap between the comb teeth, and quickly pass through the gap between the comb teeth, and be better sucked into the suction port.

[0060] The other structures and beneficial effects of this embodiment are consistent with those of the first embodiment and will not be described in detail here.

[0061] It is easy for those skilled in the art to understand that the protection scope of the present application is not limited to the above preferred embodiments. Without departing from the technical principles of the present application, those skilled in the art can split and combine the technical solutions in the above preferred embodiments, and can also make equivalent changes or replacements to the relevant technical features. Any changes, equivalent replacements, improvements, etc. made within the technical concept and / or technical principles of the present application will fall within the protection scope of the present application.

Claims

1. A surface cleaning device with good suction power, comprising a floor brush with a dirt suction port, a body hinged to the floor brush, and a dirt suction fan, wherein the floor brush is provided with a roller brush for cleaning the surface to be cleaned and a scraping member and a combing member for cleaning the roller brush, wherein the scraping member and the combing member are sequentially arranged above the dirt suction port from top to bottom, and characterized in that: The combing piece is provided with a plurality of comb teeth, and a gap is formed between two adjacent comb teeth. The combing piece also includes a connecting portion that connects at least the upper portion of the comb teeth, and the comb teeth extend upward along the front surface of the connecting portion, and the thickness of the comb teeth gradually decreases to be flush with the front end of the connecting portion. The comb teeth at least partially extend downward, so that the gap is at least partially located between the sewage suction port and the roller brush to form a slit effect area.

2. The surface cleaning device according to claim 1, characterized in that The width of the comb teeth is b, and the distance between two adjacent comb teeth is L, wherein b>L, and the distance L satisfies 0.7mm≤L<1.5mm.

3. The surface cleaning device according to claim 1, characterized in that The effective area of ​​the slit effect zone is S, and the equivalent area of ​​the sewage suction port is S0, wherein 2≤S / S0≤12.

4. The surface cleaning device according to claim 1, characterized in that The sewage suction port is flat, and the top of the sewage suction port is not lower than the central axis of the roller brush. The height of the sewage suction port covered by the gap is h, and the height of the sewage suction port is H, wherein 0.2≤h / H≤0.

25.

5. The surface cleaning device according to claim 1, characterized in that The lower end of the connecting portion is arranged lower than the top of the sewage suction port.

6. The surface cleaning device according to claim 1, characterized in that The connecting portion is provided with a guide groove, and the guide groove is arranged corresponding to the gap.

7. The surface cleaning device according to claim 6, characterized in that The guide groove is formed by extending the gap upward along the connecting portion.

8. The surface cleaning device according to claim 6, characterized in that The guide groove is formed by a gap extending upward through the connecting portion to the lower surface of the scraping section.

9. The surface cleaning device according to claim 1, characterized in that The comb teeth at least partially extend into the bristles of the roller brush, the comb teeth at least partially are located below the central axis of the roller brush, and the front tooth surfaces of the comb teeth extend downward along the outer circumference of the roller brush.

10. The surface cleaning device according to claim 1, characterized in that The scraping member and the combing member both contact the roller brush, the front end of the scraping member is located in front of the front surface of the combing member, and the gap between the front surface of the combing member, the lower surface of the scraping member and the outer surface of the roller brush forms a suction negative pressure zone.

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