Surface cleaning device with good dirt suction effect

Abstract

The present invention discloses a surface cleaning device with good dirt suction effect, comprising a dirt suction fan and a floor brush provided with a roller brush, the floor brush being provided with a dirt suction port facing the roller brush, a comb tooth member with multiple comb teeth and a scraper, the comb tooth member and the scraper respectively abut against the roller brush to scrape off dirt on the surface of the roller brush, the dirt suction fan sucks away the scraped dirt / dirty liquid through the dirt suction port, the comb tooth member extends downward from the top outer side of the dirt suction port to the dirt suction port to partially cover the dirt suction port to increase the suction pressure, and at the same time the comb teeth guide the sucked dirt or dirty liquid toward the dirt suction port, most of the dirty liquid and dirt sucked from the surface to be cleaned to the dirt suction port as well as entangled objects such as hair can easily enter the dirt suction port, the dirt suction effect is good, the dirt suction efficiency is high, thereby bringing a good experience to customers.

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 scraper 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 thoroughly. 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 discloses a combing unit including a series of spaced protrusions or teeth extending into the cleaning roller to prevent accumulation and remove debris (e.g., hair, thread, etc.), the protrusions extending along most of the cleaning roller and partially extending into the cleaning roller to intercept the debris as it passes around the roller, the protrusions having an angled leading edge that is not aligned with the rotation center of the cleaning roller and is directed to or against the rotation direction of the cleaning roller. The shape and configuration of the combing unit and the protrusions 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 well prevent the accumulation and entanglement of hair, thread, etc., due to the small spacing between the protrusions or teeth, solid waste is easily retained in the spacing between the protrusions or teeth, so the cleaning of the protrusions or teeth after being dirty brings new troubles to customers. In addition, since the rated power of the dirt suction motor is fixed and the size of the dirt suction port is also fixed, the position of the combing unit and the direction of the protrusion or tooth setting are very important. Since the protrusion or tooth in the prior art is guided in the direction of rotation of the cleaning roller or in the opposite direction of rotation of the cleaning roller, it interferes with the cleaning cloth on the cleaning roller to a large extent, which not only increases the resistance to the movement of the cleaning roller, but also causes the drive motor to consume more, which is not conducive to the drive motor to maintain a good working performance, and is easy to seriously affect the service life of the drive motor. In addition, the interference with the cleaning roller is large, and tooth marks appear on the cleaning roller one by one, which not only causes the cleaning effect of the cleaning roller to be uneven, and then the problem of partial incomplete cleaning of the surface to be cleaned occurs, but also the long-term interference causes the brush body or bristles of the cleaning roller to be partially thinned, greatly reducing the service life of the cleaning roller. Summary of the invention

[0004] In the surface cleaning device of the present invention, the comb teeth have a guiding function toward the sewage suction port, and the comb teeth extend downward to at least partially cover the sewage suction port to increase the wind pressure, thereby improving the sewage suction effect of the sewage suction port, and the cleaning power of the surface 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 dirt suction effect, including a dirt suction fan and a floor brush provided with a roller brush, the floor brush is provided with a dirt suction port facing the roller brush, a comb tooth member with multiple comb teeth and a scraper, the comb tooth member and the scraper are respectively in contact with the roller brush to scrape off dirt on the surface of the roller brush, and the dirt suction fan draws away the scraped dirt / dirty liquid through the dirt suction port, and is characterized in that the comb tooth member extends downward from the top outer side of the dirt suction port to the dirt suction port to partially cover the dirt suction port to increase the suction pressure.

[0006] Furthermore, the floor brush is also provided with a floor scraper bar in contact with the surface to be cleaned, a dirt suction nozzle is formed between the floor scraper bar and the roller brush, the comb tooth member is arranged on the top wall of the dirt suction port, and the comb tooth member is provided with a guide portion toward the dirt suction nozzle.

[0007] Furthermore, the comb teeth include a rear tooth surface facing away from the roller brush, and the rear tooth surface is inclined toward the sewage suction port.

[0008] Furthermore, the comb teeth include a rear tooth surface away from the roller brush and a front tooth surface arranged toward the roller brush, and the rear tooth surface is inclined toward the suction nozzle to form a guide portion; or, the comb tooth part also includes a connecting portion, and the comb teeth include a rear tooth surface away from the roller brush and a front tooth surface arranged toward the roller brush, the rear tooth surface is connected to the rear surface of the connecting portion, and the rear surface of the connecting portion and the rear tooth surface together form a guide portion.

[0009] Furthermore, the angle a at which the front tooth surface is inclined downward along the top of the sewage suction port is 80°≤a<90°.

[0010] Furthermore, the rear tooth surface is inclined downward at an angle of θ, 30°≤θ≤35°.

[0011] Furthermore, the connecting portion at least partially extends downward to the sewage suction port.

[0012] Furthermore, the comb teeth are arranged at the lower end of the connecting part, and the tooth grooves between the comb teeth extend upward along the front surface of the connecting part to form a guide groove; or, the connecting part abuts against the scraper, and the tooth grooves between the comb teeth extend upward along the front surface of the connecting part to the lower surface of the scraper to form a guide groove.

[0013] Furthermore, the tooth grooves between the comb teeth have an arcuate surface opposite to the roller brush, and the center of the arcuate surface is located on a side away from the center of the roller brush.

[0014] Furthermore, a spacing area is provided between the comb teeth and the scraper, so that the dirt scraped off by the scraper flows through the spacing area and the tooth grooves of the comb teeth in sequence.

[0015] The beneficial effects of the above technical solution are:

[0016] 1. The present invention provides a plurality of comb teeth on the comb tooth member, wherein the comb teeth have a front tooth surface facing the roller brush and in contact with the surface of the roller brush, and the front tooth surface extends downward from the outer side of the top of the sewage suction port to at least partially cover the sewage suction port. When the surface cleaning device cleans the surface to be cleaned while scraping the dirt, the sewage suction fan works, so that the effective area of ​​the sewage suction port becomes smaller. Therefore, compared with the sewage suction port not blocked by the comb teeth, the wind pressure at the sewage suction port partially blocked by the comb teeth is increased, and most of the dirty liquid and dirt sucked from the surface to be cleaned to the sewage suction port and entangled objects such as hair can easily enter the sewage suction port. When sucking dirt, the roller brush rotates, and a small amount of dirt, dirty liquid and hair entanglements that have not been sucked in continue to move upward with the roller brush, and the comb teeth and the scraper contact the roller brush in turn, and the comb teeth are used to peel off and scrape off the hair and other entanglements on the brush body, and the scraper is used to scrape and squeeze the brush body of the roller brush to scrape off the dirt and dirty liquid on the brush body of the roller brush. The dirty liquid flows downward by gravity and the squeezing force of the scraper, and under the guidance of the front tooth surface, the liquid flow flushes the hair and other entanglements that have been peeled off and loosened near the comb teeth to the sewage suction port. Since the comb teeth have gaps, and the gaps have a corresponding part set at the sewage suction port like the comb teeth, the gaps between the comb teeth corresponding to the sewage suction port part cause a slit effect to be formed on the upper part of the sewage suction port, and the gaps between the comb teeth As the wind pressure increases, the scraped dirty liquid, along with dirt and entangled materials, are smoothly sucked into the sewage suction port through the gaps between the comb teeth of the corresponding sewage suction port, thereby further improving the sewage suction effect. Even if there are larger solid particles with a size similar to the gaps between the comb teeth, the comb teeth will be deformed under the action of the larger wind pressure, thereby increasing the gaps between the comb teeth, and then larger particles or clumped entangled materials are sucked into the sewage suction port through the gaps between the comb teeth by the suction force generated by the larger partial pressure. 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 entangled materials are better, and no dirt or entangled materials will remain on the comb teeth, thus bringing a good experience to customers.

[0017] 2. The floor brush of the present invention is also provided with a floor scraper bar in contact with the surface to be cleaned, a dirt suction nozzle is formed between the floor scraper bar and the roller brush, the comb tooth member is provided on the top wall of the dirt suction nozzle, the comb tooth member is provided with a guide portion facing the dirt suction nozzle, when sucking dirt, under the action of the dirt suction fan, most of the dirty liquid and dirt on the surface to be cleaned move toward the dirt suction nozzle, and enter the air duct between the dirt suction nozzle and the dirt suction nozzle in the roller brush cavity through the dirt suction nozzle under the drive of the roller brush, because the comb tooth member is provided with a guide portion inclined toward the dirt suction nozzle, under the guiding action of the guide portion, the dirty liquid, dirt and hair are removed The entangled objects are moved toward the sewage suction port. When they move to the sewage suction port, the comb teeth extend downward and partially block the sewage suction port. The effective area of ​​the air duct at the sewage suction port blocked by the comb teeth suddenly becomes smaller, so the wind pressure increases, and the suction force near the sewage suction port blocked by the comb teeth increases. Under the increased suction force and the guiding effect of the comb teeth, the retention and adhesion of dirty liquid and dirt at the sewage suction port are reduced. Most of the dirty liquid and dirt can enter more effectively and quickly when they move 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.

[0018] 3. Since the sewage suction fan is located on the body and above the sewage suction port, under the action of the sewage suction fan, the airflow moves upward from the sewage suction port. Since the comb tooth part has a guide part inclined toward the sewage suction nozzle, the comb tooth part is located at the top of the sewage suction port, and the comb tooth part extends downward from the top of the sewage suction port and partially blocks the sewage suction port. Although the blocked area of ​​the sewage suction port becomes smaller, the wind pressure here increases. The present invention is achieved by the comb teeth including a rear tooth surface away from the roller brush and a front tooth surface arranged toward the roller brush, and the rear tooth surface is inclined toward the sewage suction nozzle to form a guide portion; or, the comb tooth part also includes a connecting portion, and the comb teeth include a rear tooth surface away from the roller brush and a front tooth surface arranged toward the roller brush, and the rear tooth surface is connected to the rear surface of the connecting portion, and the rear surface of the connecting portion and the rear tooth surface together form a guide portion. The guide portion formed by the rear tooth surface of the comb tooth part is more in line with the direction of the airflow, and the guiding effect of the rear tooth surface of the comb tooth part toward the sewage suction port is better. Under the action of the sewage suction fan, the dirt and dirty liquid on the surface to be cleaned enter the sewage suction port and the air duct between the sewage suction port through the sewage suction nozzle between the scraper strip and the roller brush. Under the guiding action of the rear tooth surface of the comb tooth part, most of the dirty liquid and dirt can also move smoothly along the guide surface to the vicinity of the sewage suction port, and under the action of the increased wind pressure at the blocked sewage suction port, quickly enter the sewage suction port, thereby further improving the sewage suction efficiency and improving the sewage suction effect.

[0019] 4. By setting the angle of the rear tooth surface to θ, and θ satisfying 30°≤θ≤35°, it is easier and more difficult for the dirty liquid and dirt to move smoothly to the vicinity of the suction port, thereby better improving the suction efficiency and the suction effect. If the angle θ of the rear tooth surface inclination is greater than 35°, the covering area of ​​the sewage suction port by the comb teeth is increased. At this time, the sewage suction port is blocked too much, and the maximum passing length or width of the sewage suction port is reduced, especially for some heavier materials with a larger length or width. Although the wind pressure increases, the suction force of the sewage suction port here increases and can be greater than the weight of the material, if its length or width is greater than the maximum passing length or width of the sewage suction port, the material still cannot pass through the sewage suction port, and the sewage suction effect becomes worse; when the angle θ of the rear tooth surface inclination is less than 30°, the sewage suction port is less blocked and the guide path is lengthened, but the wind pressure after the sewage suction port is blocked does not increase much, and the suction force increases insignificantly or less. Although the area of ​​the sewage suction port is less affected and larger particles of dirt can enter, the lengthening of the guide path causes the dirt or dirty liquid to consume more energy in the sewage suction channel, and the suction force is insufficient, which not only fails to improve the suction efficiency, but also makes the comb teeth hinder the dirty liquid and dirt from entering the sewage suction port, which reduces the suction effect.

[0020] 5. A connecting portion is formed between the tooth grooves between the comb teeth, which has a guiding effect on the scraped dirty liquid. The connecting portion at least partially extends downward to the sewage suction port, forming a leeward port of the airflow, so that the airflow here is more likely to generate negative pressure, thereby providing a higher water pressure for the flow of dirty liquid, which is more conducive to the dirty liquid driving the peeled dirt and hair entanglements to move downward to the sewage suction port. The lower end of the connecting portion is lower than the upper end of the sewage suction port so that the connecting portion at least partially blocks the sewage suction port, so that the gap between the comb teeth below the connecting portion between the comb teeth is long enough to form a slit effect at the sewage suction port, so that the wind pressure of the gap between the comb teeth at the sewage suction port is increased. Since the lower end of the connecting portion is lower than the upper end of the sewage suction port, the gap between the comb teeth corresponds to the sewage suction port. Therefore, the wind pressure at the sewage suction port corresponding to the gap increases greatly, so that an unbalanced airflow is generated at the sewage suction port corresponding to the gap. The entanglements and dirt such as hair moving downward driven by the dirty liquid move from the connecting portion to the gap between the comb teeth at the sewage suction port. When there are gaps between the comb teeth, under the action of the greater wind pressure of the unbalanced airflow generated by the gaps between the comb teeth, dirty liquid, dirt, hair and other entangled objects are smoothly sucked into the suction port, thereby further improving the suction effect. Even if there are larger solid particles with a size similar to the gaps between the comb teeth, since the gaps between the comb teeth all correspond to the settings of the suction port, even if larger particles or clumped entangled objects with a size similar to the gaps between the comb teeth enter the gaps between the comb teeth, the comb teeth through which the larger particles pass are deformed under the action of the greater wind pressure, thereby increasing the gaps between the local comb teeth, and then causing the larger particles or clumped entangled objects to be sucked into the suction port through the deformed 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 the comb teeth on the roller brush is improved, especially the stripping and suction effects on the entangled objects are better, and no dirt or entangled objects will remain on the comb teeth, thereby bringing a good experience to customers.

[0021] 6. A gap is provided between the connecting portion and the roller brush, and the gap between the connecting portion and the roller brush forms a diversion effect for dirty liquid or dirt, which has a good diversion effect on the liquid flow to the gap between the comb teeth below, so that the liquid flow drives the entangled dirt or hair to flow downward to the gap between the comb teeth, and the flow is smoother, which can not only quickly and smoothly flush the entangled dirt or hair in the tooth groove to the gap between the comb teeth at the corresponding sewage suction port, but also facilitate it to be quickly sucked away from the sewage suction port.

[0022] 7. The comb teeth are arranged at the lower end of the connecting part, and the tooth grooves between the comb teeth extend upward along the front surface of the connecting part to form a guide groove; or the connecting part is in contact with the scraper, and the tooth grooves between the comb teeth extend upward along the front surface of the connecting part to the lower surface of the scraper to form a guide groove, so that the drainage effect of the liquid flowing to the tooth grooves between the lower comb teeth, especially the tooth groove parts between the comb teeth that pass through the front and rear tooth surfaces, is good, so that the liquid flow drives the entangled dirt or hair to flow downward to the gap between the comb teeth more smoothly, and the entangled dirt or hair in the guide groove can be quickly and smoothly washed to the gap between the comb teeth, so that it is convenient to be sucked away under the action of the larger wind pressure at the suction port. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of a first embodiment of the surface cleaning device of the present invention;

[0024] Figure 2 is a cross-sectional view of the surface cleaning device

[0025] Figure 3 A schematic diagram of a second embodiment of the surface cleaning device of the present invention;

[0026] Figure 4 yes Figure 3 A schematic diagram of a floor brush of the surface cleaning device described in;

[0027] Figure 5 yes Figure 4 A cross-sectional view of the floor brush along the AA direction;

[0028] Figure 6 yes Figure 5 The enlarged view of point A in the middle;

[0029] Figure 7 This is an exploded view of the roller brush and roller brush cover installed on the floor brush;

[0030] Figure 8 yes Figure 3 Front view of the middle floor brush;

[0031] Fig. 9 yes Figure 8 The enlarged view of point B in the middle;

[0032] Fig.10 yes Fig. 9 The cross-sectional view of the structure at B along the CC direction;

[0033] Fig.11 Other embodiments of the connecting portion of the comb teeth member;

[0034] Fig.12 Another embodiment of the connecting portion of the comb teeth member;

[0035] Fig.13 is a cross-sectional view of a floor brush of a third embodiment of the surface cleaning device of the present invention;

[0036] Fig.14 yes Fig.13 The enlarged view of point D in the middle;

[0037] Fig.15 yes Fig.14 An enlarged view of the fitting part between the middle comb teeth and the scraper;

[0038] Fig.16 Fig.17 are other embodiments of the connecting portion of the comb tooth member;

[0039] Fig.18 The present invention is another embodiment of a floor brush equipped with a comb tooth member and a scraper.

[0040] The figures are as follows:

[0041] 1. Body; 11. Handle; 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. Sewage suction port; 241. Top; 25. Sewage suction hose; 26. Roller brush cover; 27. Roller brush chamber; 28. Floor scraper; 3. Clean water tank; 4. Roller brush; 41. Bristles; 42. Brush body; 43. Roller; 44. First rotating roller; 45. Second rotating roller; 46. Support frame; 500. Suction negative pressure area (liquid flow pressurization area); 5. Scraping Plate; 51, installation section; 52, suspended section; 521, front end; 53, transition section; 54, lower surface; 6, comb teeth; 61, comb teeth; 611, through section; 612, guide section; 613, gap; 614, guide groove; 615, slit effect area; 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; 622, rear surface; 64, fixing part; 7, dirt bucket (dirt box); 8, water distribution part; 9, spacing area. DETAILED DESCRIPTION

[0042] Those skilled in the art should understand that the embodiments described below are merely preferred embodiments of the present application, which are merely used to explain the technical principles of the present application and are not used to limit the protection scope of the present application.

[0043] It should be noted that in the description of this application, the terms "center", "upper", "lower", "top", "bottom", "vertical", "horizontal", "inner", "outer" and other terms indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation on this application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0044] In addition, it should be noted that in the description of this 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 components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] 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.

[0046] When 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 gas is compressible, the density will also increase. The effect of this terrain canyon on 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 bar of the floor brush. When it moves to the suction port, it encounters the gap between the comb teeth covering the 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. Similarly, when the liquid flows from a wider and flatter area into a small slit or pipe, the water pressure increases and the flow rate increases. The liquid flow pressurization area in the present invention refers to the small slit between the comb tooth piece and the roller brush where the liquid flows into, and the narrow gap formed by the tooth grooves between the comb teeth.

[0047] The slit effect area of ​​the present invention refers to the area formed by the gaps between two adjacent comb teeth arranged corresponding to the sewage suction port when the comb teeth partially cover the sewage suction port. For example, if there are 8 comb teeth covering the sewage suction port, there are 7 comb tooth gaps among the 8 comb teeth, and the area formed by these 7 gaps is the slit effect area.

[0048] 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 brush body and the bristles wipe the surface to be cleaned, the scraper squeezes and scrapes the roller brush, and the dirty liquid and dirt on the bristles and / or the brush body are scraped off, the comb teeth scrape off the hair and other entanglements on the bristles and the brush body, 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.

[0049] Embodiment 1:

[0050] As a surface cleaning device with good dirt suction effect described in the present invention, Figure 1 and Figure 2 As shown, it includes a machine body, which is equivalent to a floor brush 2, a shell of the floor brush 2 of the machine body, and the shell of the machine body includes a lower shell 22 and an upper shell 21 buckled on the lower shell 22. A sewage suction fan (not shown in the figure) is arranged in the shell, and a sewage box 7 is detachably arranged on the machine body and has an air duct between the sewage suction fan. The bottom of the lower shell 22 is recessed upward to form a roller brush cavity 27. The roller brush 4 is detachably arranged in the roller brush cavity 27 at the bottom of the lower shell 22. A floor scraper strip 28 is arranged at the bottom end of the cavity wall of the roller brush cavity 27. The gap between the floor scraper strip 28 and the roller brush 4 forms a sewage suction nozzle 29. The sewage suction nozzle 24 is arranged On the cavity wall of the roller brush cavity 27, the comb teeth 6, the scraper 5 and the water dividing plate 8 are arranged on the cavity wall of the roller brush cavity 27 from bottom to top in sequence, and are located above the central axis of the roller brush 4. The dirt holding box 7 is connected with the dirt suction port 24 through the dirt suction pipe. The comb teeth 6 and the scraper 5 are respectively in contact with the roller brush 4 to scrape off the dirt on the surface of the roller brush 4. The dirt suction fan sucks the scraped dirt / dirty liquid into the dirt suction channel to the dirt holding box through the dirt suction port 24. The comb teeth 4 are arranged on the top wall of the dirt suction port 24, and extend downward from the top outer side of the dirt suction port 24 to the dirt suction port to partially cover the dirt suction port to increase the suction pressure. When the surface cleaning device cleans the surface to be cleaned, the roller brush rotates, the scraper strip scrapes the dirt and the dirt suction fan works. Since the comb teeth partially block the dirt suction port, the effective area of ​​the dirt suction port becomes smaller. Therefore, compared with the dirt suction port not blocked by the comb teeth, the wind pressure at the dirt suction port partially blocked by the comb teeth increases. Most of the dirty liquid and dirt sucked from the surface to be cleaned to the dirt suction port, as well as entangled objects such as hair, can easily enter the dirt suction port, thereby improving the dirt suction effect.

[0051] Embodiment 2:

[0052] As a surface cleaning device with good dirt suction effect described in the present invention, Figures 3 to 12 As shown, it includes a floor brush 2 that can move on the surface to be cleaned (generally the ground), and a body 1 hinged to the floor brush 2, wherein the rear part of the floor brush 2 is pivotally connected to the lower part of the body 1, and a handle 11 for driving is arranged at the upper end of the body 1, and a dirt bucket 7, a clean water tank 3 and a dirt suction fan (not shown in the figure) for sucking dirty liquid and / or dirt into the dirt bucket 7 are arranged on the body 1, and a detachable power source structure is also provided on the body 1, and the dirt suction fan and the battery pack are arranged in the power source structure, and the power source system is arranged above the dirt bucket and on the same side as the dirt bucket, and 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, and the upper shell 21 is buckled on the lower shell 22 to form a floor brush shell, and the area inside the floor brush shell forms a accommodating chamber 23, and the front side of the bottom 222 of the lower shell 22 is also provided with a floor scraper 28 arranged obliquely downward, and the floor scraper 28 in this embodiment 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 comb tooth 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 surfaces of the first rotating roller 44 and the second rotating roller 45, and the cleaning member includes a brush body 42 and bristles 41. The diameters of the first rotating roller 44 and the second rotating roller 45 are equal, the scraper 5 is arranged above the central axis EF of the first rotating roller 44, the suspended section 52 of the scraper 5 is inclined 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 surfaces 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 scraper 5 and the comb tooth member 6 are successively arranged above the sewage suction port 24, and a water dividing member 8 is also provided above the scraper 5, the lower surface of the scraper 5 is at least partially in contact with the upper surface of the comb tooth member 6, the comb tooth member 6 is provided with a plurality of comb teeth, and the comb tooth member 6 is provided with a plurality of comb teeth 61, the comb teeth 61 has a front tooth surface 616 facing the roller brush 4 and contacting the surface of the roller brush 4, and the front tooth surface 616 extends downward from the outer side of the top of the sewage suction port to at least partially block the sewage suction port 24. When the surface cleaning device is scraping dirt and cleaning the surface to be cleaned, the suction fan works, which makes the effective area of ​​the suction port smaller. Therefore, compared with the suction port not blocked by the comb teeth, the wind pressure at the suction port partially blocked by the comb teeth increases, and most of the dirty liquid and dirt sucked from the surface to be cleaned to the suction port, as well as entangled objects such as hair, can easily enter the suction port.

[0053] like Figure 3 and Figure 4 As shown, the front side of the bottom 224 of the lower housing 22 is also provided with a floor scraper 28 in contact with the surface to be cleaned, the floor scraper 28 is located below the dirt suction port 24 and a dirt suction nozzle 29 is formed between the floor scraper 28 and the roller brush 4, the downwardly extending portion of the comb tooth member 6 is located between the dirt suction port 24 and the dirt suction nozzle 29, and the comb tooth member 6 has a guide portion inclined toward the dirt suction nozzle 29. In this embodiment, the comb tooth member 6 also includes a connecting portion 62, the comb teeth 6 include a rear tooth surface 617 away from the roller brush and a front tooth surface 616 arranged toward the roller brush, the rear tooth surface 617 is connected to the rear surface 622 of the connecting portion 62, and the rear surface 622 of the connecting portion 62 and the rear tooth surface 617 together form a guide portion. The front tooth surfaces 616 of the comb teeth 61 extend downward and partially block the sewage suction port 24, so that the area of ​​the airflow at the sewage suction port 24 blocked by the comb teeth 61 suddenly becomes smaller, so the wind pressure increases, and the suction force of the airflow near the sewage suction port 24 blocked by the comb teeth 61 increases. Under the increased suction force and the guiding action of the guide part of the comb teeth 61, 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 the sewage suction port blocked by the comb teeth more effectively and quickly and pass through the sewage suction port to be continuously sent upward to the sewage storage bucket, thereby improving the sewage suction efficiency.

[0054] like Figure 5 , Figure 6 and Figure 7 As shown, the comb teeth 61 of the comb tooth member 6 at least partially extend into the bristles 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 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 rectangular extending from the connecting portion to the tooth tip, the rear tooth surface 617 is inclined toward the direction of the sewage suction port 24, the front end 521 of the scraper 5 is located in front of the tooth tip 618 of the comb teeth 61 and contacts the brush body 42 of the roller brush 4, the comb teeth 61 at least partially extend into the bristles 41 of the roller brush 4, the lower surface 54 of the scraper 5 and the front surface of the comb tooth member 6 form a liquid flow pressurization area 500, as shown Figure 7 As shown, the comb teeth are at least partially arranged in the liquid flow pressurization area. When the cleaning work starts, the roller brush rotates, and the comb teeth first contact the roller brush, peeling off the dirt, dirty liquid, hair and other entanglements on the roller brush and moving downward to the dirt suction port. Even if a small amount of dirt, dirty liquid, hair and other entanglements are not completely peeled off, their adhesion or winding relationship with the roller brush has been loosened, and they continue to move upward with the roller brush to the scraper. The front end of the scraper is located in front of the tooth tip. The scraper deeply squeezes and scrapes the roller brush, so that the dirty liquid in the roller brush is squeezed out again, and this small amount of dirt is also scraped off. The hair entanglements are completely peeled off, and the dirty liquid squeezed out again also flows downward along the front surface of the comb teeth with the peeled dirt, hair and other entanglements. At this time, the dirty liquid squeezed twice merges to form a larger The liquid flow continues to move downward. Since the gap between the front surface of the comb tooth member 6, the lower surface 54 of the scraper 5 and the roller brush 4 is small, and this area is partially filled with bristles, the water pressure of the liquid flow in this area increases. The lower surface 54 of the scraper 5 and the front surface of the comb tooth member 6 form a liquid flow pressurization area. The comb teeth are at least partially arranged in the liquid flow pressurization area. The liquid flow that intersects in this area carries dirt, hair and other entangled objects into the gap between the comb teeth and is divided into multiple liquid flows. The water pressure of the multiple liquid flows in the gap between the comb teeth is instantly increased again, and the flow rate is accelerated. The dirty liquid carries dirt, hair and other entangled objects through the gap between the comb teeth and is quickly guided downward to the sewage suction port, and is sucked into the sewage suction port under the action of the sewage suction fan.

[0055] like Figures 3 to 6As shown, the front side 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 221 between the first convex edge 222 and the second convex edge 223, the comb tooth member 6 includes a comb tooth 61, a fixing portion 64 and a connecting portion 62 connecting the fixing portion and the comb tooth, the comb tooth 61 is protruding downward from the connecting portion 62, the longitudinal section of the comb tooth 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 between the two adjacent guide sections 612, and the guide groove 614 is provided between the two adjacent guide sections 612. 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 dividing member 8 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 dividing member 8. From the front side of the roller brush 4 toward the sewage suction port, the comb teeth 61 extend downward and at least partially cover the sewage suction port 24. There is a gap 613 between the two adjacent through sections that penetrates 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 at the sewage suction port 24. Figure 8 As shown, 10 is a schematic diagram of the operation when the airflow passes through the gap between the comb teeth. When the suction fan is working, the wind pressure at the gap 613 increases and the wind speed also increases, while the wind pressure near the suction port not covered by the comb teeth is smaller than here, resulting in an unbalanced airflow at the suction port. The hair and other entanglements, dirt, and dirty liquid in the gap between the comb teeth are smoothly sucked into the suction port at a faster wind speed under the action of the larger wind pressure of the unbalanced airflow, thereby further improving the suction efficiency. Therefore, the accumulation of hair and solid dirt in the gap between the comb teeth is avoided, especially for the stripping and suction of entanglements. The effect is better, and there will be no dirt or entanglements left on the comb teeth, which brings a good experience to customers.

[0056] like Figure 6As shown, the comb tooth member 6 is provided with a plurality of comb teeth 61, and the width of the guide groove is not greater than the gap between the comb teeth, so as to ensure that a sufficiently large water pressure is generated in the guide groove, so that the dirty liquid carrying dirt or hair entanglements can flow quickly to the countryside without getting stuck and adhering here. The equivalent tooth width of the comb teeth is b, 1.4mm≤b≤1.6mm, and the tooth width is reasonable, which not only ensures the contact area between the comb teeth and the brush body, thereby ensuring that the dirt or hair entanglements on the brush body can be peeled off without any residue, but also ensures the number of comb teeth and guide grooves, thereby ensuring that the liquid flow generates sufficient water pressure between the comb teeth, and the generated water pressure is sufficient to be greater than the adhesion of dirt or entanglements or dirty liquid, so that the dirt or hair entanglements between the comb teeth are flushed downward, thereby ensuring the effect of removing entanglements such as hair, which is more conducive to the dirt passing through the gap between the comb teeth smoothly into the suction port such as the sewage suction port. The width of the comb teeth 61 is b, and 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 of the gap, 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 covering the sewage suction port is reasonable, thereby ensuring the area of ​​the slit effect zone, and 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 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 easier for dirt to pass through the gap between the comb teeth and enter the sewage suction port. The height of the through section 611 covering the sewage suction port 24 is h, wherein 0.7mm<h≤3.5mm, which ensures that the length of the through section covering the comb teeth at the sewage suction port is sufficient to increase the wind pressure of the through section covering 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 brush body 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 brush body 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 brush body, and the comb teeth will not pose much 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 scraper is also better.

[0057] like Figure 7As shown, the comb teeth 61 are inclined downward relative to the horizontal plane and extend toward one side of the roller brush 4. The angle between the comb teeth 61 and the horizontal plane is not less than 60°. In this embodiment, the longitudinal section of the comb teeth is a triangle. The comb teeth 61 have a front tooth surface 616 and a rear tooth surface 617 that are inclined downward. The front tooth surface 616 is inclined downward along the top 241 of the sewage suction port 24 at an angle a of 80°≤a<90°, so that the position where the tooth tip of the comb teeth is tangent to the brush body of the roller brush is reasonable, and the length of the comb teeth that can be extended into the bristles of the brush body 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 brush body too much or even form tooth marks. When a is greater than or equal to 90°, the length of the comb teeth covering the sewage suction port is larger, and the sewage suction area of ​​the sewage suction port is greatly reduced. Although the problem of sucking dirt or dirty liquid or entangled objects peeled off and scraped off the brush body of the cleaning roller by the scraper and comb teeth is solved, 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 sewage suction port, which brings a worse experience to customers. Moreover, the depth of the comb teeth inserted into the bristles is shallow, and the problem of entangled objects such as dirt or hair at the roots of the bristles being difficult to peel off may occur. When a is less than 80°, the length of the comb teeth covering the sewage suction port is small. Although the larger dirt sucked from the surface to be cleaned can be sucked into the sewage suction port, and the hair and the like will not be entangled at the tooth tips of the comb teeth, the depth of the comb teeth extending into the bristles increases. Although the stripping effect of the entangled objects on the brush body is good, the tooth tips of the comb teeth and the brush body of the cleaning roller are in great conflict, which easily forms tooth marks on the brush body, and secondary contamination of the surface to be cleaned is caused. In addition, since the length of the comb teeth covering the sewage suction port is small, the gap between the comb teeth does not change the wind pressure at the sewage suction port much, so the wind pressure is small. Even if fewer and lighter entangled objects 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 in the gap between the comb teeth, making it difficult to suck out small granular dirt or small entangled objects. The rear tooth surface 617 is connected to the rear surface 622 of the connecting portion 62, and the rear surface 622 of the connecting portion 62 and the rear tooth surface 617 together form a guide portion. The connecting portion 62 at least partially extends downward to the sewage suction port 24, where a leeward port of the airflow is formed, making it easier for the airflow here to generate negative pressure, thereby providing a higher water pressure for the flow of dirty liquid, and being more conducive to the dirty liquid driving the peeled dirt and hair entanglements to move downward to the sewage suction port. The lower end of the connecting portion 62 is lower than the upper end of the sewage suction port 24 so that the connecting portion 62 at least partially blocks the sewage suction port, so that the gap between the comb teeth below the connecting portion is of sufficient length at the sewage suction port, thereby better forming a slit effect, and increasing the wind pressure of the gap between the comb teeth at the sewage suction port. Since the lower end of the connecting portion is lower than the upper end of the sewage suction port, the gaps between the comb teeth all correspond to the sewage suction port. Therefore, the wind pressure at the sewage suction port corresponding to the gaps increases more, which is more conducive to the sewage suction nozzle of the surface cleaning device to suck sewage from the surface to be cleaned.In this embodiment, the rear tooth surface 617 is arranged to be inclined downward along the connecting portion 62, and 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 rear surface 622 of the connecting portion 62, and the first inclined surface 6171 is formed by extending the rear surface 622 downward, and the guide portion is formed by the rear surface 622, the first inclined surface 6171, and the second inclined surface 6172. The inclination angle of the first inclined surface 6171 is β, where a≤β≤90°, and 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 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 produce 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.

[0058] like Figure 4As shown, the suspended section 52 of the scraper 5 is in conflict with the brush body 42 of the roller brush 4, and the tooth tip of the through section 611 of the comb tooth 61 extends into the wetted bristles, so that the front tooth surface 616 of the comb tooth 61 intersects with the wetted part of the bristles, and the tooth tip 618 of the comb tooth 61 is tangent to the brush body 42. The tangent line MN formed by the tooth tip of the comb tooth and the brush body 42 of the roller brush 4 is located in the front tooth surface 616, so that the comb teeth 61 of the comb tooth member 6 can extend into the bristles 41 of the brush body 42, and the comb tooth member 6 and the roller brush 4 are connected. The contact surface of the brush body 42 of the brush 4 is greatly reduced, and only the tooth tip 618 is in line contact, so that the comb teeth 61 of the comb tooth member 6 comb the bristles 41 downward along the tangential direction of the brush body 42 of the roller brush 4, which can effectively scrape and peel off the entanglement on the surface of the roller brush 4 and the dirt hidden in the roots of the bristles 41. The tooth tip 618 will not form tooth marks on the brush body 42 and will not increase the resistance of the roller brush to rotate, which greatly reduces the problem of stalling of the drive motor that drives the roller brush to rotate due to the increase in resistance.

[0059] When the sewage suction fan is working, the airflow passes through the sewage suction port to form a wind pressure zone. The area between the front surface of the comb tooth part 6 and the lower surface 54 of the scraper 5, which is located above the sewage suction port and between the roller brush, does not correspond to the sewage 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. The scraper 5 squeezes and scrapes the brush body 42. Under the negative pressure environment, after the dirty liquid is scraped off, the suction negative pressure area between the scraper 5 and the front surface of the comb tooth part 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 entanglements or dirt peeled off from the brush body by the comb teeth are flushed, and the liquid flow drives the dirt, hair and other entanglements to flow through the area where the front tooth surface of the comb teeth is in contact with the brush body line of the roller brush to the through section at the suction port, thereby ensuring that no entanglements remain in the gaps between the comb teeth, not only solving the problem of the roller brush being entangled and the problem of hair and other entanglements being entangled between the gaps between the comb teeth, but also enabling the dirty liquid, dirt, hair and other entanglements to quickly flow to the gaps between the comb teeth at the suction port, and be smoothly sucked into the suction port by the large wind pressure, thereby improving the suction efficiency and the suction effect. Therefore, the suction negative pressure area of ​​the air flow is also the liquid flow pressurization area of ​​the dirty liquid.

[0060] In this embodiment, the mounting section 51 is disposed above the central axis EF of the roller brush 4. A transition section 53 is further disposed between the mounting section 51 and the suspended section 52. The suspended section 52 is tilted downward along the diameter of the roller brush 4 and contacts the brush body, so that the transition section 53 smoothly connects the mounting section 51 and the suspended section 52. The fixing portion 63 of the comb tooth member 6 is fitted with the mounting section. The suspended section 52 is at least partially disposed above the comb teeth 61. The front end 521 of the suspended section 52 of the scraper 5 is located in front of the tooth tip 618 of the through section 611. The tooth tip 618 is tangent to the brush body 42 of the roller brush 4. The area between the partial lower surface 54 of the scraper 5, the partial front surface of the comb tooth member 6 and the outer surface of the roller brush 4 forms a leeward area that airflow cannot pass through. This area forms a suction negative pressure area 500. Figure 7 As shown, since the comb teeth 61 and the guide grooves 614 extend upward to the scraper 5, the front surface of the comb tooth member 6 includes the front tooth surface 616 of the comb teeth 61 and the guide grooves 614. Therefore, in this embodiment, the front tooth surface 616 of the comb teeth, the guide grooves 614, the lower surface 54 of the scraping section 5 and the outer surface of the roller brush 4 form a suction negative pressure zone 500.

[0061] 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 dividing piece, 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 brush body and bristles on the roller brush or driven to move upward with the roller brush, the comb tooth piece contacts the roller brush, and the tooth tip is tangent to the brush body of the roller brush. The comb teeth are extended into the bristles of the roller brush, and the dirt, hair and other entanglements on the brush body are peeled off and scraped off by the comb teeth. Then the roller brush continues to rotate to the scraper, and the scraper is used to scrape and squeeze the brush body of the roller brush to scrape off the dirt and dirty liquid on the brush body of the roller brush. At the same time, the entanglements scraped off by the comb teeth are continued to be scraped by the scraper, and a small amount of entanglements 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 scraper is located in front of the tooth tip of the penetration section, the tooth tip of the comb teeth is tangent to the brush body 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 gap between the front surface of the comb teeth, the lower surface of the scraper and the outer surface of the roller brush is located in the area above the suction port. The airflow in the area cannot pass through, so these areas are leeward areas, and the leeward areas form negative pressure areas for airflow. The lower surface 54 of the suspended section, the front tooth surface 616 of the comb teeth 61, and the gap between the guide groove 614 and the outer surface of the roller brush form a suction negative pressure area for airflow. The scraper squeezes and scrapes the brush body. Under the negative pressure environment, after the dirty liquid is scraped off, the suction negative pressure area between the bottom of the scraper and the front surface of the comb teeth gathers to a certain extent, generating a large water pressure, and at the same time forming a liquid flow pressurization area, so that the dirty liquid carries with it the entanglement and dirt such as hair that is completely peeled off by the scraper, and under the action of the large water pressure formed by gravity and the squeezing force of the scraper, rushes to the area where the guide section of the comb teeth is located, and is divided into multiple liquid flows by the guide section of the comb teeth and enters the guide groove between the guide sections. Under the guidance of the guide section of the tooth, the liquid flow carries dirt, hair and other entanglements into the guide groove between the guide sections. Since the guide groove forms a narrow tube, the instantaneous water pressure in the guide groove 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 brush body 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 smoothly sucked into the sewage suction port under the action of the larger wind pressure of the unbalanced airflow.Therefore, 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. 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 scraper to effectively peel off entangled objects such as hair, thereby 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, thereby greatly improving the overall cleaning effect of the surface cleaning device and improving the cleaning efficiency.

[0062] In this embodiment, the sewage suction fan and the battery pack are installed in a shell to form an independent power source, and the power source is detachably mounted on the fuselage. The shell of the power source 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 a sewage bucket on the fuselage. The sewage bucket is detachably mounted on the fuselage. A limiting surface for limiting the barrel wall of the sewage bucket is provided on the fuselage. A gap is formed between the limiting surface and the sewage bucket. An exhaust port is provided on the fuselage. 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. The exhaust port is connected with the limiting surface and the sewage bucket to form a gap, so that the air is discharged from the fuselage through the gap between the two.

[0063] Of course, it is understandable that the suction fan and the battery pack can also be arranged inside the fuselage; 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 curved surface convex downward, such as Fig. 9 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.10 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 examples one by one here.

[0064] Embodiment three:

[0065] The difference between this embodiment and the second embodiment is that the roller brush in this embodiment is a single roller brush or, and the structure of the comb teeth is different.

[0066] As the surface cleaning device described in the present invention, Figures 11 to 13As shown, the roller brush 4 includes a hollow roller 43 and a cleaning member covering the outer surface of the roller 43, the cleaning member includes bristles 41 and a brush body 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 arranged above the central axis EF of the roller brush 4, and the suspended section 52 is arranged to coincide with the central axis EF of the roller brush. The connecting portion 62 of the comb tooth member 6 is arranged in contact with the mounting section, and the transition section 53 smoothly connects the mounting section 51 and the suspended section 52. The suspended section 52 is at least partially arranged above the comb teeth 61. The suspended section 52 is located above the central axis of the roller brush and is arranged parallel to the central axis EF of the roller brush 4, as shown in FIG. Fig.12 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. The lower end of the connecting portion 62 between two adjacent guide sections 612 is provided with a guide groove 614. 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 scraper but extends to the front surface of the comb tooth member, that is, the comb teeth 61 are not all arranged on the front surface of the comb tooth member 6, but the connecting portion 62 of the comb tooth member 6 extends forward to the upper part of the comb teeth 61 and is connected to the suspended section 52 of the scraper 5. The comb teeth are connected to the suspended section 52 of the scraper 5 by a connecting portion 62, and the front side of the connecting portion 62 forms a drainage surface 621 that guides the liquid flow downward. Therefore, the front surface of the comb tooth member 6 in this embodiment includes the drainage surface 621 formed by the front side of the connecting portion 62, the front tooth surface 616 of the comb tooth 61, and the bottom surface of the guide groove 614. The area between the partial lower surface 54 of the scraper 5, the front surface of the comb tooth member 6, the guide groove 614 and the outer surface of the roller brush forms a leeward area that the airflow cannot pass through, and this area forms a suction negative pressure area 500. Fig.13As 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. In this way, the liquid flow formed by the dirty liquid squeezed and scraped off by the scraper bar passes through the drainage surface 621, and washes the dirt and / or entanglements peeled off from the roller brush by the scraper bar to the comb teeth, and then is swept by the wind flow of the guide groove. Since the drainage area and the guide groove are leeward areas where airflow cannot pass, a suction negative pressure area is formed. Therefore, the water pressure of the liquid flow in the drainage area is increased, and when passing through the narrow area of ​​the guide groove, a narrow tube effect is generated, so the water pressure increases instantly, and a liquid flow pressurization area is formed at the same time, which accelerates the liquid flow to carry the dirt and / or entanglements through the guide groove of the guide section, smoothly enters the gap of the through section, and forms 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 entanglements to the slit effect area and is quickly sucked into the sewage suction port.

[0067] In this embodiment, Fig.13As shown, the comb teeth 61 include a rear tooth surface 617 away from the roller brush and a front tooth surface 616 arranged toward the roller brush, and the rear tooth surface 617 is inclined toward the suction nozzle 29 to form a guide portion. The rear surface 622 of the connecting portion 62 is inclined downward relative to the horizontal plane, and the rear tooth surface 617 is connected to the rear surface 622 of the connecting portion 62 and continues to extend downward along the rear surface 622 thereof, where the guide portion is formed by the rear surface 622 and the rear tooth surface 617. The angle between the rear tooth surface 617 and the horizontal plane is θ, where θ is the angle of inclination of the rear tooth surface 617, 30°≤θ≤35°. Under the guiding effect of the inclination angle θ of the rear tooth surface 617 and the rear surface 22, 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 storage 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 storage 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 covering 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. The suction force generated is sufficient to be greater than the adhesion force 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, thereby making it easier for dirt to pass through the gap between the comb teeth and enter the sewage suction port. The height of the comb teeth covering the sewage suction port downward is h=1mm. The comb teeth formed by this scheme are relatively small, so no obvious tooth marks will be produced on the brush body, and the movement resistance of the roller brush is also relatively small. The comb teeth are long enough to extend into the bristles to deal with entanglements, and the length covering the sewage suction port is also relatively small. Therefore, there is little obstacle for the surface cleaning device to suck away larger dirt from the surface to be cleaned. Not only can it deal with larger garbage on the surface to be cleaned, but also a certain slit effect can be formed at the sewage suction port, and the cleaning and suction effect of a small part of dirt or dirty liquid or entanglements scraped off by the comb teeth and scraper is also better.

[0068] Of course, it is understandable that we can also use such comb teeth, such as Fig.14 As shown, the bottom surface of the groove of the tooth groove is not higher than the top surface of the sewage suction port, and the bottom surface of the groove of the tooth groove is a downward curved arc surface; or, the comb tooth member includes a fixing portion, a connecting portion and a comb tooth, and the comb tooth only includes a through section, and no diversion section is provided, such as Fig.15As shown, of course, there is no guide groove on the connecting part, and the front end of the connecting part extends forward, and its top surface is in contact with the suspended section of the scraper, and the front end of the suspended section of the scraper protrudes from the front end of the connecting part, and the front surface of the connecting part forms a drainage area for the comb teeth and the scraper, and the tooth grooves of the comb teeth are arranged horizontally, and the groove bottom surface of the tooth groove of the comb teeth is arranged flush with the upper top surface of the sewage suction port, and the groove bottom surface of the tooth groove is a plane; as long as this comb tooth part covers the sewage 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 the entanglements, dirty liquid and dirt into the sewage suction port, and the technical solutions that do not deviate from the concept of the present invention to improve the sewage suction effect are all within the protection scope of the present invention, and examples will not be given one by one here.

[0069] 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.

[0070] Embodiment 3

[0071] The difference between this embodiment and the second embodiment lies in the different structures and installation positions of the scraper and comb teeth.

[0072] 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 comb tooth member 6 and the scraper 5, so that the dirt scraped off by the scraper flows through the spacing area 9 and the tooth grooves in sequence. Fig.16 As shown, the comb-tooth member 6 is not fitted with the scraper, and a slot is provided on the first protrusion 222, and the comb-tooth member 6 is arranged in the slot, and the scraper 5 is arranged above the first protrusion 222 and located on the water-dividing plate 8, so that it is clamped by the first protrusion 222 and the water-dividing plate 8, and the front side of the first protrusion forms a spacing area 9 between the comb-tooth member and the scraper. The gap between the spacing area and the outer surface of the roller brush is larger, and there is a little more buffer space for the dirty liquid and dirt or hair and other entanglements scraped off from the scraper, so that the dirty liquid, dirt, etc. can rely on gravity to flush the hair and other entanglements to the position of the comb-tooth member, so that the hair and other entanglements pass through the gap between the comb teeth again and enter the sewage suction port. Although it is conducive to the removal of hair entanglements, due to the large space of the spacing area, there may be bristles in the spacing area itself that cannot be reached, and the self-cleaning effect of the spacing area is slightly affected.

[0073] Of course, it is understandable that the comb teeth can also be embedded in the front side wall of the lower shell and located below the first protrusion, extending forward and downward from the front of the first protrusion; or the comb teeth can also be integrally formed with the first protrusion. Such technical solutions that do not deviate from the concept of the present invention are within the protection scope of the present invention and are not listed one by one here.

[0074] The other structures and beneficial effects of this embodiment are consistent with those of the second embodiment and will not be described in detail here.

[0075] 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 dirt suction effect, comprising a dirt suction fan and a floor brush provided with a roller brush, the floor brush being provided with a dirt suction port facing the roller brush, a comb tooth member having a plurality of comb teeth and a scraper, the comb tooth member and the scraper respectively abut against the roller brush to scrape off dirt on the surface of the roller brush, the dirt suction fan extracts the scraped dirt / dirty liquid through the dirt suction port, characterized in that: The floor brush is also provided with a floor scraper bar in contact with the surface to be cleaned, a dirt suction nozzle is formed between the floor scraper bar and the roller brush, the comb tooth member is provided on the top wall of the dirt suction port, the comb tooth member is provided with a guide portion facing the dirt suction nozzle, the fixing portion of the comb tooth member and the mounting section of the scraper are arranged not lower than the central axis of the roller brush, the comb tooth member extends downward from the top outer side of the dirt suction port to the dirt suction port to partially block the dirt suction port to increase the suction pressure, the comb tooth member also includes a connecting portion, the connecting portion abuts against the scraper, the tooth grooves between the comb teeth extend upward along the front surface of the connecting portion to the lower surface of the scraper to form a guide groove, and the lower surface of the scraper and the front surface of the comb tooth member form a liquid flow pressurization area.

2. The surface cleaning device according to claim 1, characterized in that The comb teeth include a rear tooth surface away from the roller brush and a front tooth surface arranged toward the roller brush, and the rear tooth surface is inclined toward the sewage suction nozzle to form a guide portion.

3. The surface cleaning device according to claim 1, characterized in that The comb teeth include a rear tooth surface facing away from the roller brush and a front tooth surface arranged toward the roller brush, the rear tooth surface is connected to the rear surface of the connecting portion, and the rear surface of the connecting portion and the rear tooth surface jointly form a guide portion.

4. The surface cleaning device according to claim 2 or 3, characterized in that The rear tooth surface is inclined downward at an angle of θ, 30°≤θ≤35°.

5. The surface cleaning device according to claim 3, characterized in that The connecting portion at least partially extends downward to the sewage suction port.

6. The surface cleaning device according to claim 3, characterized in that The comb teeth are arranged at the lower end of the connecting part.

7. The surface cleaning device according to claim 1, characterized in that The tooth grooves between the comb teeth have an arc surface opposite to the roller brush, and the center of the arc surface is located on a side away from the center of the roller brush.

8. The surface cleaning device according to claim 1, characterized in that A spacing area is arranged between the comb teeth and the scraper, so that the dirt scraped off by the scraper flows through the spacing area and the tooth grooves of the comb teeth in sequence.

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