Floor brush, cleaning machine and working method of cleaning machine

Abstract

The floor brush comprises a shell of a dust collection cavity and a brush body arranged in the dust collection cavity, and a first water scraping piece is rotationally arranged at the position, on the front side of the dust collection cavity, of the bottom of the shell; the first water scraping part adopts a rolling brush, the rolling brush comprises a roller and a plurality of brush strips, the roller extends in the width direction, the brush strips are distributed at intervals in the circumferential direction and extend on the roller in the axial direction of the rolling brush, the brush strips can make interference contact with the ground and form a suction opening capable of being communicated with the dust collection cavity, and the position of the suction opening changes in the axial direction along with rolling of the rolling brush. The ground brush can solve the problem of long-distance linear water stains in a working state with lower friction force in the moving process of the cleaning machine. The invention further relates to a cleaning machine applying the floor brush. The invention further relates to a working method of the cleaning machine, the first water scraping piece rotates in the position scraping direction which is the same as the moving direction of the cleaning machine, unit water spots are formed on the ground based on the suction port formed between the first water scraping piece and the ground, and a broken point-shaped water film is formed based on the axial change of the position of the suction port.

Description

Technical Field

[0001] The invention relates to the technical field of cleaning machines, in particular to a floor brush, a cleaning machine and a working method of the cleaning machine. Background Art

[0002] Traditional wet cleaning equipment, such as floor scrubbers, usually uses a suction nozzle to clean and suck dirt from the floor to be cleaned. In the prior art, such equipment usually requires the user to repeatedly move the suction nozzle back and forth to suck up as much dirty liquid as possible on the floor. However, due to the limited suction force and the structural setting of the suction nozzle, it is difficult to suck up small particles of liquid remaining on the floor, which results in poor drying effect of the floor after cleaning, and the residual water stains can easily cause secondary pollution.

[0003] In order to solve the water stain problem, the Chinese utility model patent "A floor brush module for a cleaning machine and a cleaning machine" with the authorization announcement number CN218279525U (application number 202221997085.1) discloses a floor brush module in which brush strips are respectively arranged on the front and rear sides of the dust suction chamber, so as to achieve the water scraping work during the forward and backward process of the cleaning machine, and avoid water stains on the ground. However, in order to ensure the effective absorption of particles on the ground, some gaps will be opened on the brush strips. For example, in the Chinese utility model patent "Floor suction nozzle for wet cleaning equipment" with authorization announcement number CN209951157U (application number 201920499374.0), a small particle liquid capture device is also provided in the disclosed floor suction nozzle, which includes front and rear flexible scraping lip strips arranged side by side, the front and rear flexible scraping lip strips both extend in the left and right direction, a liquid inlet gap is constructed between the front and rear flexible scraping lip strips, the liquid inlet gap is connected to the suction channel, and the front flexible scraping lip strip has a front scraping edge located at the bottom, and the front scraping edge has a plurality of notches that pass through the front and back, and the notches are connected to the liquid inlet gap. However, when the cleaning setting of this structure is in use, based on the notch structure on the front scraping edge, the water in the dust suction chamber will leave long-distance linear water stains on the ground based on the notch during the retreat of the cleaning equipment. When the surrounding water stains are scraped off, it is relatively abrupt, making it difficult for users to accept. In addition, the existing brush strip structures also greatly increase the walking resistance of the cleaning equipment due to their high degree of contact with the ground. Summary of the invention

[0004] The first technical problem to be solved by the present invention is to provide a floor brush that can solve the problem of long-distance linear water stains in a relatively low friction working state during the movement of the cleaning machine in response to the above-mentioned prior art.

[0005] The second technical problem to be solved by the present invention is to provide a cleaning machine using the above-mentioned floor brush in view of the above-mentioned prior art.

[0006] The third technical problem to be solved by the present invention is to provide a working method of a cleaning machine in view of the above-mentioned prior art, which can avoid linear water stains during the movement of the cleaning machine and make the operation more labor-saving.

[0007] The fourth technical problem to be solved by the present invention is to provide a working method of a cleaning machine that can match the travel speed of the cleaning machine and ensure that the length of each water stain unit is short enough, with respect to the above-mentioned prior art.

[0008] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a floor brush, comprising a shell having a dust suction chamber opening downward, and a brush body arranged in the dust suction chamber, characterized in that: a first wiper member is rotatably arranged at the bottom of the shell at the front side of the dust suction chamber;

[0009] The first wiper member adopts a roller brush, which includes a drum and a plurality of brush strips. The drum extends in the width direction, and the plurality of brush strips are distributed at intervals in the circumferential direction and extend on the drum along the axial direction of the roller brush. The brush strips can make interference contact with the ground and form a suction port that can be connected to the dust suction chamber, and the position of the suction port changes axially as the roller brush rolls.

[0010] As an improvement, the brush strip is a flexible rib arranged in a V-shape along the axial direction on the drum.

[0011] Optionally, the cross section of the rib is rectangular or trapezoidal.

[0012] As an improvement, the brush strip is a scraper blade extending in a straight line along the axis of the roller brush, and at least one notch is provided on the outer edge of the scraper blade, and the notches on two adjacent scrapers are staggered.

[0013] As an improvement, a second wiper is provided at the bottom of the housing at the rear side of the dust suction chamber.

[0014] Optionally, the second wiper member is a scraper or the roller brush.

[0015] The technical solution adopted by the present invention to solve the above second technical problem is: a cleaning machine, characterized in that it includes the floor brush as mentioned above.

[0016] The technical solution adopted by the present invention to solve the third technical problem is: a working method of a cleaning machine, characterized in that: the cleaning machine adopts the cleaning machine as described above;

[0017] During the cleaning process of the cleaning machine, when the cleaning machine moves backward, the first wiper element rotates in the same scraping direction as the moving direction of the cleaning machine, and a unit water stain is formed on the ground based on the suction port formed between the first wiper element and the ground, and a breakpoint-shaped water film is formed based on the axial change of the suction port position.

[0018] As an improvement, when the cleaning machine moves backward, the backward speed v1 of the cleaning machine is obtained, and the rotation speed w1 of the first wiper member is adjusted based on the backward speed v1. The rotation speed w1 satisfies: the length of each unit water spot in the breakpoint-shaped water film is less than or equal to the set first target water spot length M.

[0019] The technical solution adopted by the present invention to solve the fourth technical problem mentioned above is: the brush strip is a flexible convex rib arranged in a V shape on the roller; w1=arccos[(R1-d*tanβ) / R1]*v1 / M, wherein R1 is the diameter of the roller brush, d is the axial spacing width between two adjacent brush strips, and β is the angle between the brush strip and the axis of the roller.

[0020] Optionally, the brush strip is a scraper extending in a straight line along the axial direction of the roller brush, w1 = 2*θ*v1 / M.

[0021] To ensure the cleaning effect, the roller brush satisfies R2 / (H+r)≤cosθ, where θ is the angle between two adjacent brush strips, R2 is the actual radius of the roller brush when it contacts the ground, H is the height of the brush strip on the roller, and r is the diameter of the roller.

[0022] As an improvement, a second wiper is provided at the bottom of the housing at the rear side of the dust suction chamber, and the second wiper is the roller brush;

[0023] During the cleaning process of the cleaning machine, when the cleaning machine moves forward, the second wiper element rotates in the same scraping direction as the moving direction of the cleaning machine, and a unit water stain is formed on the ground based on the suction port formed between the second wiper element and the ground, and a breakpoint-shaped water film is formed based on the axial change of the suction port position.

[0024] As an improvement, when the cleaning machine moves forward, the forward speed v2 of the cleaning machine is obtained, and the rotation speed w2 of the roller brush is adjusted based on the forward speed v2. The rotation speed w2 satisfies: the length of each unit water stain in the breakpoint-shaped water film is less than or equal to the set second target water stain length Y.

[0025] Optionally, the brush strip is a flexible rib wound around the drum in a V-shape;

[0026] w2=arccos[(R1-d*tanβ) / R1]*v2 / Y, where R1 is the roller brush diameter, d is the axial spacing width between two adjacent brush strips, and β is the angle between the brush strip and the roller axis.

[0027] Optionally, the brush strip is a scraper extending in a straight line along the axial direction of the roller brush; w2=2*θ*v2 / Y.

[0028] To ensure the cleaning effect, the roller brush satisfies R2 / (H+r)≤cosθ, where θ is the angle between two adjacent brush strips, R2 is the actual radius of the roller brush when it contacts the ground, H is the height of the brush strip on the roller, and r is the diameter of the roller.

[0029] Compared with the prior art, the advantages of the present invention are as follows: the floor brush of the present invention is provided with a rollable roller brush as a scraping member for scraping off water stains. When in use, the roller brush contacts the ground through rolling friction, which greatly reduces the friction between the roller brush and the ground. At the same time, the roller brush rotates so that the position of the suction port formed between the roller brush and the ground changes along the axial direction as the roller brush rotates, that is, the position of the suction port will not remain unchanged in the axial direction. In this way, as the floor brush moves, long-distance linear water stains will not appear on the ground, that is, the problem of long-distance linear water stains is solved under a working state of low friction.

[0030] The cleaning machine using this floor brush can eliminate the problem of long-distance linear water stains with less effort, making it more user-friendly and easier for users to operate, even without assistance.

[0031] The method for using the cleaning machine of the present invention is to change the position of the suction port by rolling the roller during the movement of the cleaning machine, thereby avoiding the occurrence of long-distance linear water stains, making the positions of the water stains formed on the ground more dispersed, and thus forming a breakpoint-shaped water film state, which is not abrupt on the ground and is more easily accepted by users. In addition, on the basis of solving the problem of long-distance linear water stains, the use is more labor-saving and the operation is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a three-dimensional diagram of the first type of floor brush in an embodiment of the present invention.

[0033] Figure 2 It is a three-dimensional diagram of the first roller brush in the embodiment of the present invention.

[0034] Figure 3 It is a three-dimensional diagram of the second type of floor brush in an embodiment of the present invention.

[0035] Figure 4 It is a stereoscopic diagram of the second roller brush in the embodiment of the present invention.

[0036] Figure 5 This is a state diagram of the first floor brush in an embodiment of the present invention when it is in contact with the ground.

[0037] Figure 6 This is a state diagram of the second floor brush in an embodiment of the present invention when it is in contact with the ground. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below with reference to the accompanying drawings.

[0039] like Figures 1 to 4 As shown, the floor brush in this embodiment includes a housing 1, a brush body 2 and a first wiper. The bottom of the housing 1 has a dust suction chamber opening downward, and the brush body 2 is arranged in the dust suction chamber as a core cleaning component of the floor brush. The brush body 2 can adopt various brush body 2 structures in the prior art, such as the brush body 2 structure in the cleaning device mentioned in the background technology, and the brush body 2 can be used to clean the floor.

[0040] The first wiper is rotatably arranged at the bottom of the housing 1 and located at the front side of the dust suction chamber. The first wiper is mainly used for cleaning water stains on the ground during the backward movement of the floor brush.

[0041] In this embodiment, the first wiper member is a roller brush 3, which includes a roller 31 and a plurality of brush strips. The roller 31 extends in the width direction, and the plurality of brush strips are distributed at intervals in the circumferential direction and extend on the roller 31 along the axial direction of the roller brush 3. The brush strips can be deformed and come into interference contact with the ground. In order to better capture the water stain particles on the ground, when the brush strip contacts the ground, a suction port 30 is formed between the brush strip and the ground. The suction port 30 allows external air to enter and is connected to the dust suction chamber. When in use, based on the operation of the fan in the cleaning machine, under the wiper action of the roller brush 3, the water stain particles in other areas except the suction port 30 are sucked into the sewage box through the suction port 30 and the dust suction chamber due to the negative pressure, and water stains are formed at the suction port 30. If the position of the suction port 30 relative to the axial position of the roller brush 3 is always maintained, as the floor brush moves, a long-distance linear water stain will be formed based on the suction port 30. Compared with the ground without water stains at other positions, the long-distance linear water stain will appear more abrupt, which is easily misunderstood by users as unclean cleaning.

[0042] In this embodiment, the position of the suction port 30 formed between the brush strip and the ground can be changed axially as the roller brush 3 rolls through the design of the roller brush 3. Thus, as the floor brush moves and the roller brush 3 rolls, a water film consisting of a plurality of short-line unit water stains will be formed on the ground. If the short-line unit water stains are short enough, a water film with point distribution will be formed based on the diffusion effect of the water itself. When the user observes the ground as a whole, the unit water stains on the ground are relatively evenly distributed, not abrupt, and will not cause discomfort.

[0043] Specifically, in this embodiment, the brush strip in the roller brush 3 can adopt any one of the following two structures.

[0044] like Figure 1 and Figure 2As shown, the first type is: the brush strip is a flexible rib 32 that is axially V-shaped and wound around the roller 31, and the brush strip has a certain width. In this embodiment, the cross section of the brush strip is rectangular or trapezoidal. In this way, when the roller brush 3 rolls on the ground, two symmetrical suction ports 30 are formed between the spacing grooves between two adjacent brush strips and the ground, and the position of the suction port 30 relative to the axial position of the roller 31 is constantly changing as the roller brush 3 rolls.

[0045] like Figure 3 and Figure 4 As shown, the second type is: the brush strip is a scraper 33 extending in a straight line along the axial direction of the roller brush 3, at least one notch 34 is provided on the outer edge of the scraper 33, and the notches 34 on two adjacent brush strips are arranged alternately. When the scraper 33 contacts the ground due to deformation, a suction port 30 connected to the dust suction chamber is formed between the notch 34 on the scraper 33 and the ground. The structure in which the notches 34 on two adjacent brush strips are arranged alternately enables the position of the suction port 30 to change alternately in the axial direction during the rotation of the roller brush 3.

[0046] This embodiment also relates to a cleaning machine, in which the aforementioned floor brush is used. The cleaning machine can be a cleaning robot, a sweeping machine, a floor scrubber, or other cleaning machines.

[0047] Based on the aforementioned floor brush structure, the working method of the cleaning machine is as follows: during the cleaning process of the cleaning machine, when the cleaning machine moves backward, the first wiper rotates in the same scraping direction as the moving direction of the cleaning machine. At the same time, based on the suction port 30 formed between the first wiper and the ground, a short-line unit water stain will be formed on the ground, and as the first wiper rotates, the position of the suction port 30 keeps changing in the axial direction of the roller brush 3, thereby forming a breakpoint-shaped water film. If the length of the unit water stain is short enough, and based on the outward expansion and overflow of the water itself, a more evenly distributed lattice-shaped water film will be formed on the ground.

[0048] Specifically, when the cleaning machine moves backward, the backward speed v1 of the cleaning machine is obtained, and the rotation speed w1 of the first wiper is adjusted based on the backward speed v1. The rotation speed w1 satisfies: the length of each unit water stain in the breakpoint-shaped water film is less than or equal to the set first target water stain length M. According to different roller brush 3 structures, or based on different needs, the first target water stain length M can be set to different values. For example, M can be set to 1cm, 0.7cm, etc. In addition, in order to facilitate the drive of the first wiper and the adjustment of its rotation speed, the floor brush also includes a first drive mechanism arranged on the housing 1. The first drive mechanism may include a first motor and a first transmission assembly connected between the first motor and the first wiper. The first transmission assembly may adopt various transmission structures in the prior art. The rotation speed w1 of the first wiper is adjusted by controlling the parameters of the first motor.

[0049] At the same time, based on the rolling of the roller brush 3, if the walking speed of the cleaning machine is low or the rotation speed of the roller brush 3 is large enough, when the next brush bar contacts the ground, it can also completely scrape off or partially scrape off the unit water stain left on the ground by the previous brush bar, so that the length of the unit water stain left on the ground based on each suction port 30 is shorter.

[0050] In this embodiment, for the two different brush strip structures, different calculation methods are used to determine the rotation speed w1 of the first wiper element, so that the unit water stain length formed on the ground does not exceed the first target water stain length M.

[0051] like Figure 5 As shown, for the floor brush of the first brush strip structure, the rotation speed of the first wiper is adjusted to w1. w1 = arccos[R1-d*tanβ / R1*v1 / M, where R1 is the diameter of the roller brush 3, d is the axial spacing width between two adjacent brush strips, and β is the angle between the brush strip and the axis of the roller 31.

[0052] The specific analysis is as follows: Based on the V-shaped structure, a spiral groove is formed between the two brush strips on the roller brush 3. The width of the groove along the axial direction is d, and the angle between the center line of the groove and the axis of the roller brush 3 is β. The position of the suction port 30 formed when the brush strip contacts the ground is shown in the shaded part of the figure. During the rotation process, point B as shown in the figure will reach point A during the rotation process, and the corresponding position of the suction port 30 will shift to the right. After the position of the suction port 30 moves, the problem of continuous long-distance linear water stains caused by the suction port 30 can also be solved. At the same time, based on the calculation of the ground brush rotation speed w1, the length of each unit water stain in the breakpoint-shaped water film is less than or equal to the set first target water stain length M.

[0053] The first target water stain length is set to M. Even if the water stains formed in each unit cannot be effectively scraped off, they are short enough to form non-continuous dot-shaped water stains, which are easily accepted by customers.

[0054] Based on the movement of the floor brush, a relationship can be obtained: T1 = M / v1, where T1 is time.

[0055] Based on the rotation of the roller brush 3 , a relationship can be obtained: T1=α / w1, where α is the rotation angle corresponding to the rolling distance L.

[0056] based on Figure 5 The structural parameters of the roller brush 3 in the equation are obtained as follows: α = arccos [R1-L / R1], L Figure 5 The scroll distance marked in .

[0057] based on Figure 5 The relationship can be obtained: L = d*tanβ.

[0058] Combining the above equations, we can obtain: w1 = arccos[R1-d*tanβ / R1]*v1 / M.

[0059] Based on the calculation process, it can be known that controlling the roller brush 3 to rotate according to the determined rotation speed w1 can ensure that the length of the unit water stain formed does not exceed M.

[0060] like Figure 6 As shown, for the floor brush of the second brush strip structure, the roller brush 3 is designed to satisfy R2 / H+r≤cosθ, where θ is the angle between two adjacent brush strips, R2 is the actual radius of the brush strip in the roller brush 3 when it is in interference contact with the ground, H is the height of the brush strip on the roller 31, and r is the diameter of the roller 31. Based on the parameter relationship of the roller brush 3, the interference contact state between the brush strip and the ground can be ensured, and the basic wiping effect can be ensured.

[0061] When the cleaning machine is working, control and adjust w1=2*θ*v1 / M.

[0062] like Figure 6 As shown, the specific analysis is: in order to ensure that the roller brush 3 maintains a seal with the ground during the rotation of the roller brush 3, the brush strip of the roller brush 3 needs to maintain continuous contact with the ground during the rotation. Figure 6 In the figure, the roller brush 3 is in a critical state of contact with the ground, that is, the two brush strips are in a symmetrical state. To maintain the above-mentioned seal, the following inequality needs to be satisfied between the various parameters: R2 / H+r≤cosθ. When the brush strip interference is large, the roller brush 3 will lift the floor brush, causing vibration. Therefore, when the critical state of the inequality R2 / H+r=cosθ is taken, the floor brush can move stably.

[0063] Since adjacent brush strips have different notches 34 in the axial direction, when the roller brush 3 rotates, the position of the suction port 30 changes alternately with the position of the notch 34. At the same time, based on this structure, during the rotation of the roller brush 3, the following brush strip can at least partially scrape off the unit water stains left by the previous brush strip due to the notch 34.

[0064] Based on the movement of the floor brush, a relationship can be obtained: T2 = M / v1, where T2 is the time required for the suction port 30 to form a water stain of length M when the notch 34 of a brush bar contacts the ground.

[0065] Based on the rotation of the roller brush 3 , a relationship can be obtained: T2=2θ / w1.

[0066] Combining the two equations, we can get: w1=2*θ*v1 / M.

[0067] The floor brush of the present invention is provided with a rollable roller brush 3 as a scraper for scraping water stains. When in use, the roller brush 3 contacts the ground through rolling friction, greatly reducing the friction between the roller brush 3 and the ground. At the same time, the roller brush 3 rotates so that the position of the suction port 30 formed between the roller brush 3 and the ground changes along the axial direction as the roller brush 3 rotates, that is, the position of the suction port 30 will not remain unchanged in the axial direction. In this way, as the floor brush moves, long-distance linear water stains will not appear on the ground, that is, the problem of long-distance linear water stains is solved under a working state of low friction.

[0068] The cleaning machine using this floor brush can eliminate the problem of long-distance linear water stains with less effort, making it more user-friendly and easier for users to operate, even without assistance.

[0069] The method for using the cleaning machine of the present invention is to change the position of the suction port 30 by rolling the roller during the movement of the cleaning machine, so as to avoid long-distance linear water stains, so that the water stains formed on the ground are more dispersed, and then a breakpoint-shaped water film state can be formed, which is not abrupt on the ground and is more easily accepted by users. In addition, on the basis of solving the problem of long-distance linear water stains, the use is more labor-saving and the operation is more convenient.

[0070] Embodiment 2

[0071] The difference between this embodiment and the first embodiment is that the floor brush further includes a second wiper 4, which is arranged at the bottom of the housing 1 and at the rear side of the dust suction chamber. The second wiper 4 is mainly used to scrape and clean the water stains on the ground when the floor brush moves forward. The second wiper 4 can be a scraper or a roller brush 3 as needed.

[0072] If the second wiper 4 adopts a roller brush 3, one of the two roller brush 3 structures disclosed in the first embodiment is adopted. The working method of the cleaning machine using the floor brush is as follows: during the cleaning process of the cleaning machine, when the cleaning machine moves forward, the second wiper 4 rotates in the same scraping direction as the moving direction of the cleaning machine, and a unit water stain is formed on the ground based on the suction port 30 formed between the second wiper 4 and the ground, and a breakpoint-shaped water film is formed based on the axial change of the position of the suction port 30. When the cleaning machine moves forward, the forward speed v2 of the cleaning machine is obtained, and the rotation speed w2 of the roller brush 3 is adjusted based on the forward speed v2, and the rotation speed w2 satisfies: the length of each unit water stain in the breakpoint-shaped water film is less than or equal to the set second target water stain length Y. In addition, in order to facilitate the driving of the second wiper and the adjustment of its rotation speed, the floor brush also includes a second driving mechanism arranged on the housing 1, and the second driving mechanism may include a second motor and a second transmission assembly connected between the second motor and the second wiper 4, and the second transmission assembly may adopt various transmission structures in the prior art. The rotational speed w2 of the second wiper element 4 is adjusted by controlling the second motor parameter.

[0073] The same principle as in the first embodiment, when the brush strip adopts the flexible rib 32 wound around the roller 31 in a V shape, the rotation speed w2 of the roller brush 3 is adjusted based on the forward speed v2 of the cleaning machine to be arccos[R1-d*tanβ / R1]*v2 / Y, wherein R1 is the diameter of the roller brush 3, d is the axial spacing width between two adjacent brush strips, and β is the angle between the brush strip and the axis of the roller 31.

[0074] When the brush strip adopts a scraper 33 extending in a straight line along the axial direction of the roller brush 3, the rotation speed w2 = 2*θ*v2 / Y of the roller brush 3 is adjusted based on the forward movement speed v2 of the cleaning machine.

[0075] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A floor brush, comprising a housing (1) having a dust suction chamber opening downward, and a brush body (2) arranged in the dust suction chamber, characterized in that: A first wiper is rotatably provided at the bottom of the housing (1) at the front side of the dust suction chamber; The first wiper member adopts a roller brush (3), the roller brush (3) comprising a roller (31) and a plurality of brush strips, the roller (31) extending in the width direction, the plurality of brush strips being distributed at intervals in the circumferential direction and extending on the roller (31) along the axial direction of the roller brush (3), the brush strips being able to make interference contact with the ground and forming a suction port (30) that can communicate with the dust suction chamber, the position of the suction port (30) changing along the axial direction as the roller brush (3) rolls.

2. The floor brush according to claim 1, characterized in that: The brush strip is a flexible convex rib (32) arranged in a V-shape along the axial direction on the roller (31).

3. The floor brush according to claim 2, characterized in that: The cross section of the convex rib is rectangular or trapezoidal.

4. The floor brush according to claim 1, characterized in that: The brush strip is a scraper (33) extending in a straight line along the axial direction of the roller brush (3), at least one notch (34) is provided on the outer edge of the scraper (33), and the notches (34) on two adjacent scrapers (33) are arranged in a staggered manner.

5. The floor brush according to any one of claims 1 to 4, characterized in that: A second wiper (4) is provided at the bottom of the housing (1) at the rear side of the dust suction chamber.

6. The floor brush according to claim 5, characterized in that: The second wiper element (4) is a scraper or the roller brush (3).

7. A cleaning machine, characterized in that: It comprises the floor brush as described in any one of claims 1 to 6.

8. A working method of a cleaning machine, characterized in that: The cleaning machine is the cleaning machine as claimed in claim 7; During the cleaning process of the cleaning machine, when the cleaning machine moves backward, the first wiper element rotates in the same scraping direction as the moving direction of the cleaning machine, a unit water stain is formed on the ground based on the suction port (30) formed between the first wiper element and the ground, and a breakpoint-shaped water film is formed based on the axial change of the position of the suction port (30).

9. The working method of the cleaning machine according to claim 8, characterized in that: When the cleaning machine moves backward, the backward speed v1 of the cleaning machine is obtained, and the rotation speed w1 of the first wiper member is adjusted based on the backward speed v1. The rotation speed w1 satisfies that the length of each unit water spot in the breakpoint-shaped water film is less than or equal to the set first target water spot length M.

10. The working method of the cleaning machine according to claim 9, characterized in that: The brush strip is a flexible convex rib (32) arranged in a V shape around the roller (31); w1=arccos[(R1-d*tanβ) / R1]*v1 / M, wherein R1 is the diameter of the roller brush (3), d is the axial spacing width between two adjacent brush strips, and β is the angle between the brush strip and the axis of the roller (31).

11. The working method of the cleaning machine according to claim 9, characterized in that: The brush strip is a scraper (33) extending in a straight line along the axial direction of the roller brush (3), w1 = 2*θ*v1 / M.

12. The working method of the cleaning machine according to claim 11, characterized in that: The roller brush (3) satisfies R2 / (H+r)≤cosθ, wherein θ is the angle between two adjacent brush strips, R2 is the actual radius of the roller brush (3) when it contacts the ground, H is the height of the brush strip on the roller (31), and r is the diameter of the roller (31).

13. The working method of the cleaning machine according to claim 8, characterized in that: A second wiper (4) is provided at the bottom of the housing (1) at the rear side of the dust suction chamber, and the second wiper (4) adopts the roller brush (3); During the cleaning process of the cleaning machine, when the cleaning machine moves forward, the second wiper (4) rotates in a scraping direction that is the same as the moving direction of the cleaning machine, and a unit water stain is formed on the ground based on the suction port (30) formed between the second wiper (4) and the ground, and a breakpoint-shaped water film is formed based on the axial change of the position of the suction port (30).

14. The working method of the cleaning machine according to claim 13, characterized in that: When the cleaning machine moves forward, the forward speed v2 of the cleaning machine is obtained, and the rotation speed w2 of the roller brush (3) is adjusted based on the forward speed v2, and the rotation speed w2 satisfies: the length of each unit water stain in the breakpoint-shaped water film is less than or equal to the set second target water stain length Y.

15. The working method of the cleaning machine according to claim 14, characterized in that: The brush strip is a flexible convex rib (32) arranged in a V shape around the roller (31); w2=arccos[(R1-d*tanβ) / R1]*v2 / Y, wherein R1 is the diameter of the roller brush (3), d is the axial spacing width between two adjacent brush strips, and β is the angle between the brush strip and the axis of the roller (31).

16. The working method of the cleaning machine according to claim 14, characterized in that: The brush strip is a scraper (33) extending in a straight line along the axial direction of the roller brush (3); w2 = 2*θ*v2 / Y.

17. The working method of the cleaning machine according to claim 16, characterized in that: The roller brush (3) satisfies R2 / (H+r)≤cosθ, wherein θ is the angle between two adjacent brush strips, R2 is the actual radius of the roller brush (3) when it contacts the ground, H is the height of the brush strip on the roller (31), and r is the diameter of the roller (31).

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