Cleaning apparatus for high-speed moving surfaces, method for cleaning, and use of the cleaning apparatus.

Abstract

A cleaning device (1) is proposed, comprising at least two cleaning elements (7) that are spaced apart from each other and rotatable, and these cleaning elements (7) have movable bristles (12), wherein a suction device (2) is positioned between the at least two cleaning elements (7).

Description

Technical Field

[0001] The present invention relates to a cleaning device, particularly for surfaces moving at high speed, comprising at least two cleaning elements that are spaced apart from each other and movable, for example rotatable, and these cleaning elements have movable bristles. Such cleaning devices are widely used in actual scenarios.

[0002] The present invention further relates to a method for cleaning a contaminated surface. Such methods are known in the prior art.

[0003] The present invention further relates to the use of a cleaning device. Such uses are known.

Background Art

[0004] In the prior art, surfaces contaminated by contaminant particles and moving at a speed of, for example, one meter per second or more are often inadequately cleaned. This is because the contaminant particles often remain adhered. The present invention aims to address this point and eliminate the drawbacks of the prior art.

Summary of the Invention

Problems to be Solved by the Invention

[0005] The underlying problem of the present invention is to improve the operating characteristics of the cleaning device, particularly to improve the cleaning of surfaces moving at high speed. This problem is solved by the features of the independent claims. Advantageous configurations are described in the dependent claims.

Means for Solving the Problems

[0006] It should be noted that the features individually listed in the dependent claims can be combined with each other in any technically meaningful way to define further configurations of the present invention.

[0007] Furthermore, the features listed in the claims are described in more detail in the specification, and further preferred configurations of the present invention are depicted.

[0008] To solve this problem, the present invention proposes the features of claim 1. In particular, according to the present invention, in the cleaning apparatus of the form described at the beginning, it is proposed that a suction device is arranged between at least two cleaning elements to solve the above-mentioned problem. Thus, advantageous cleaning of a moving contaminated surface can be achieved by the wiping action of the cleaning elements in combination with suction. This is especially applicable to surfaces moving at speeds in the range of 10 meters per second or more.

[0009] The suction device is positioned directly between at least two cleaning elements and perpendicular and above the moving surface to be cleaned. The suction device is positioned along the normal vector of the moving surface. "Between at least two cleaning elements" may mean that the suction device is physically present there. While suction devices are certainly known in the prior art, known suction devices are typically located in the head or foot region of the cleaning elements, rather than between the cleaning elements themselves.

[0010] The cleaning element may have movable bristles.

[0011] To solve this problem, the present invention proposes the features of claim 2. In particular, according to the present invention, in the cleaning apparatus of the form described at the beginning, in order to solve the above-mentioned problem, it is proposed that at least two cleaning elements have different permeabilities. Preferably, this permeability is formed with respect to a fluid. As the fluid, as described herein, a gaseous or liquid substance is described. Therefore, various flows of the fluid can be generated through the at least two cleaning elements, and effective cleaning can be performed. This improves the cleaning quality.

[0012] In this specification, the permeability (Durchstroembarkeit) of a cleaning element is referred to as permeability. Permeability is expressed in units of square meters (Meter zum Quadrat).

[0013] In an advantageous configuration, it may be specified that a conveying device is formed that moves the contaminated surface in the conveying direction relative to at least two cleaning elements. In this case, the speed of the contaminated surface may be 10 meters per second or more. Therefore, the cleaning performance of the cleaning device can be improved.

[0014] In a favorable configuration, at least two cleaning elements may be specified as bristle rollers, and additionally or alternatively as bristle belts. Thus, cleaning elements can be provided depending on the situation and the degree of contamination.

[0015] A bristle roller refers to a cylindrical object having bristles that can perform rolling motion. In contrast, a bristle belt is similar to a belt and has a direction of motion that extends along the belt. Therefore, a bristle belt has a direction of motion, and this direction of motion is lateral to the conveying direction of the conveying device, preferably perpendicular to it. In contrast, a bristle roller has a direction of motion that extends along the conveying direction.

[0016] The contaminated surface may be a wood surface, a plastic surface, a metal surface, a glass surface, or a paper surface.

[0017] In an advantageous configuration, it may be specified that a negative pressure is generated between at least two cleaning elements. This negative pressure is preferably provided or generated by a suction device. Thus, contaminating particles separated from the surface can be easily suctioned.

[0018] In an advantageous configuration, the distance between the bristles and the contaminated surface may be specified as not being constant in a given area of ​​the surface. This area of ​​the surface is preferably a lateral area of ​​the surface. This should help prevent this area of ​​the surface from being damaged by the rotating cleaning element, or prevent the rotating cleaning element from being damaged by the lateral area of ​​the surface.

[0019] Contaminated surfaces are particularly band-like.

[0020] In an advantageous configuration, the cleaning element may be specified to move in a direction of motion that is perpendicular to the transport direction of the contaminated surface, particularly in a direction perpendicular to it. The bristles of the cleaning element remove contaminant particles from the contaminated surface by their rotational motion, and the contaminant particles are then guided between at least two cleaning elements and sucked up by a suction device. By arranging the transport direction perpendicular to the direction of motion, the cleaning characteristics of the cleaning element can be improved.

[0021] In this application, the orthogonal direction refers to angles between 85° and 95°. In this application, angles greater than 0° and less than 90° are referred to as the lateral direction.

[0022] In an advantageous configuration, it may be specified that at least one of the two cleaning elements has a flow path perpendicular to the direction of transport of the contaminated surface. Preferably or alternatively, the flow path is formed perpendicular to the direction of motion of at least two cleaning elements. Contaminating particles may be guided through the flow path of the cleaning elements, in which case a negative Coanda effect may occur due to the suction action of the suction device. The Coanda effect refers to various phenomena that explain the tendency of a gas jet or liquid flow to travel along a convex surface rather than continuing to move away from the convex surface in the original flow direction.

[0023] In an advantageous configuration, it may be specified that at least two cleaning elements have the same permeability to each other. This can be advantageous, for example, in the case of a particular contaminated surface. Thus, the flexibility of the cleaning element with respect to the contaminated surface can be increased.

[0024] In an advantageous configuration, it may be specified that the flow channels are formed by a plurality of bristles of different lengths respectively, or by a bristle-free sub-body located on the cleaning element. Thus, the permeability of the cleaning element can be adapted according to the situation, particularly according to the speed of the contaminated surface and the degree of contamination.

[0025] In an advantageous configuration, the cleaning elements are operated in opposite directions or in the same direction relative to each other. Particularly, it may be specified that the moving directions of the cleaning elements, for example, the moving directions already described above, are in the same direction or in opposite directions relative to each other. The setting of the moving direction depends, in this case, for example, on the degree of contamination and / or the type of material to be cleaned.

[0026] In an advantageous configuration, it may be specified that a doctor blade is formed. Preferably, the doctor blade is arranged at the inversion point of the cleaning element. Additionally or alternatively, the doctor blade contacts the cleaning element and scrapes off the contaminated particles from the cleaning element, particularly from the bristles. Thus, the cleaning element can be cleaned by the doctor blade, and it can be prevented that the contaminated particles only circulate in the moving direction of the cleaning element.

[0027] In an advantageous configuration, the doctor blade may have a separate suction unit, and it may be specified that this suction unit sucks up the contaminated particles scraped off by the doctor blade. In this case, this suction unit may be formed separately or as part of a suction device. Thus, it is prevented that the contaminated particles remain attached to the bristles and only circulate in the moving direction.

[0028] In an advantageous configuration, it may be specified that at least two cleaning elements have flow channels with different dimensions and permeabilities respectively. Preferably, the flow channels are arranged transversely to, for example, the previously described direction of movement of the cleaning element. Thus, the cleaning elements can be adapted to the type of contaminating particles, the material of the contaminated surface and the speed of the conveying device.

[0029] The permeability can be set by the dimensioning and shape of the flow channels. A cleaning element without flow channels has a lower permeability than a cleaning element with flow channels.

[0030] In an advantageous configuration, it may be specified that the flow channels are formed linearly. Thereby, a positive influence can be exerted on the mobility of the contaminating particles passing through the cleaning element.

[0031] In an advantageous configuration, it may be specified that the angle α between the longitudinal axis of the flow channel and the width of the cleaning element is between 0° and 60°. It has been particularly advantageous in experiments to form the angle in this way.

[0032] In an advantageous configuration, it may be specified that the suction device has a collection unit for collecting contaminating particles. Thus, the contaminating particles can be skillfully removed from the circulation of the cleaning element and functionally collected. This is particularly important in the case of larger and heavier contaminating particles that cannot be easily removed by the suction device.

[0033] The collection unit means a unit inside which the concentration of contaminating particles increases, the contaminating particles accumulate in the collection unit and are not removed therefrom. Preferably, the contaminating particles are manually removed from the collection unit, particularly by hand. Preferably, heavy contaminating particles that cannot be sucked up by the suction device accumulate in the collection unit.

[0034] In a favorable configuration, it may be determined that cleaning elements positioned upstream in the direction of transport of the contaminated surface have higher permeability than cleaning elements positioned downstream. Therefore, contaminated particles can easily pass through the first cleaning element, and have greater difficulty passing through the cleaning elements located downstream, thus improving the cleaning function.

[0035] In an advantageous configuration, the angle α mentioned above may be specified to be of different magnitudes in at least two of the two cleaning elements. Therefore, the permeability of the cleaning elements can be precisely adjusted according to the cleaning conditions. For example, both cleaning elements may be mirror images of each other, or both flow paths may be positioned at angles with different absolute values ​​relative to each other.

[0036] In an advantageous configuration, the suction device may be specified to have a slit opening having a width smaller than the distance between at least two cleaning elements, through which contaminating particles can be sucked up. Thus, an advantageous circulation or flow can be obtained within the suction device, which is advantageous for cleaning.

[0037] In an advantageous configuration, for example, the slit opening (consisting of one or more parts) formed to suck up contaminating particles, as already described, may be specified to have a longitudinal extension (L1) greater than half the length of at least one of the cleaning elements, and in particular greater than three-quarters. Thus, it is possible to achieve suction over a complete and / or as uniformly as possible extension of the workpiece to be cleaned in the direction lateral to the conveying direction.

[0038] The longitudinal extension may be given, for example, by the distance between the ends of a slit (consisting of a single part) or a slit assembly (consisting of multiple parts) that forms a slit opening, or by the sum of the internal dimensions of the slit assembly (consisting of multiple parts).

[0039] In an advantageous configuration, the suction device may have a funnel-shaped base, with a slit opening and a collection unit adjacent to the slit opening formed at the bottom of the base. This provides advantageous flow dynamics within the base, which is beneficial for the removal of contaminated particles.

[0040] Preferably, the bristles are open at the sides.

[0041] In an advantageous configuration, it may be specified that at least two cleaning elements are arranged mirror-symmetrically on both sides of the contaminated surface. Thus, both sides of the surface can be cleaned efficiently.

[0042] In an advantageous configuration, two suction devices may be formed and arranged mirror-symmetrically on both sides of the contaminated surface. Therefore, both sides of the surface can be cleaned efficiently.

[0043] In an advantageous configuration, it may be specified that the transport direction of the contaminated surface and the movement direction of the cleaning element, for example, as already mentioned, are arranged laterally to each other, particularly orthogonally. This improves the cleaning performance of the cleaning device because if the movement direction is laterally to the transport direction, contaminated particles can be separated from the surface more easily.

[0044] In a favorable configuration, at least two cleaning elements may have stepped sections, and in the region in front of these steps, the bristles of the cleaning elements may be lifted away from the contaminated surface. This is particularly advantageous in the edge region of the surface, because it prevents the surface from being damaged or detached by the rotation of the cleaning elements.

[0045] To solve the problems described above, the present invention has identified further independent claim features of a method for cleaning a contaminated surface. In particular, to solve the problems described above, the present invention proposes that in the method of the embodiment described at the beginning, contaminating particles are guided by at least two distinct cleaning elements having permeable and movable bristles and sucked up by a suction device located between these at least two cleaning elements. Thus, the cleaning quality can be improved.

[0046] In a favorable configuration, it may be specified that contaminating particles are removed from at least two cleaning elements by a doctor blade that contacts these at least two cleaning elements at its end. This prevents the contaminating particles from remaining attached to the cleaning elements and simply circulating along the direction of motion.

[0047] In a favorable configuration, the bristles of the cleaning element may be specified to be led out from a predetermined cleaning area for the purpose of cleaning the bristles themselves. This prevents contaminating particles from simply circulating along the direction of motion while remaining attached to the cleaning element.

[0048] In an advantageous configuration, it may be specified that the contaminating particles are redirected from the transport direction by a suction device in the region between the cleaning elements. Preferably, in this case, the flight path of the contaminating particles is a hyperbolic trajectory. Thus, the contaminating particles can be removed from the contaminated surface.

[0049] In an advantageous configuration, it may be specified that the contaminating particles are accelerated through at least two cleaning elements. Preferably, the contaminating particles are accelerated toward the suction device. Thus, a dynamic flow can be obtained that efficiently separates contaminating particles adhering to a contaminated surface from the surface.

[0050] To solve the problems described above, the present invention specifies features for use in cleaning a moving contaminated surface and, additionally or alternatively, for transporting particles on the surface. In this case, a cleaning device having one of the features described above is used.

[0051] The present invention will now be described in detail based on a few embodiments, but the present invention is not limited to these few embodiments. Further variations and embodiments of the present invention may arise by combining the features of one or more of the claims with each other, and / or by combining the features of one or more of the claims with the features of the embodiments of the apparatus and method according to the present invention and / or the features of the variations described above. [Brief explanation of the drawing]

[0052] [Figure 1] This is a perspective view showing a cleaning device in the prior art. [Figure 2] Figure 1 is a side view showing a cleaning device in the prior art. [Figure 3] This is a side view showing a cleaning apparatus according to the present invention. [Figure 4] This is a perspective view showing a cleaning device equipped with mirror-symmetrical cleaning elements on both sides of a surface. [Figure 5] This is a detailed diagram showing the cleaning elements. [Figure 6] Figure 4 is a perspective view showing a cleaning apparatus equipped with mirror-symmetrical suction devices on both sides of the surface. [Figure 7]Figure 6 is a side view showing the cleaning apparatus. [Figure 8] This is a side view showing a cleaning device having three or more cleaning elements that act mirror-image symmetrically on both sides of a contaminated surface. [Figure 9] This is a perspective view showing a cleaning device in which the cleaning elements have equal permeability to each other. [Figure 10] This is a perspective view showing a cleaning device in which the cleaning elements have different permeability properties. [Modes for carrying out the invention]

[0053] In the following description of various embodiments of the present invention, elements that have the same function are given the same reference number, even if they differ from one another in configuration or shape.

[0054] While it is quite possible that each element is present in the drawing, not all reference numerals are included in the drawing for clarity. However, the same reference numeral refers to functionally and / or structurally identical components and functional units.

[0055] Figure 1 shows a perspective view of a cleaning device 1 in the prior art. The cleaning device 1 here has a suction device 2, which is spaced apart from the contaminated surface 3 moving in the transport direction 5, and contaminated particles 4 are present on this surface 3. The cleaning device 1 in Figure 1 is particularly well suited for surfaces 3 moving at a low speed (less than 1 meter per second) where the contaminated particles 4 exert little to no adhesive force on the surface 3.

[0056] Figure 2 shows a side view of the cleaning apparatus 1 in the prior art shown in Figure 1. A funnel-shaped suction device 2 is illustrated in detail. In this case, the suction device 2 has a slit opening 6 through which contaminating particles 4 are guided. If the velocity of the surface 3 is high, especially if the velocity is greater than 1 meter per second, and if contaminating particles 4 are adhering to the surface 3, it is not possible to remove all contaminating particles 4 from the surface 3. This is disadvantageous in situations where a clean surface 3 is required, for example, for subsequent processes.

[0057] Surface 3 may be made of wood, paper, metal, glass, or plastic.

[0058] Figure 3 shows a side view of the cleaning device 1 according to the present invention. The cleaning device 1 has two cleaning elements 7 formed as a bristle belt 8. The bristle belt 8 has bristles 12. The bristles 12 are movable. A suction device 2 is located between the cleaning elements 7, having a slit opening 6, which can suck up contaminating particles 4 separated by the cleaning elements 7. The suction device 2 is located above the surface 3, perpendicular to the surface 3. The cleaning elements 7 have equal permeability to each other. In an alternative embodiment, the cleaning elements 7 have different permeability to each other, in which case the cleaning element 7 located upstream in the transport direction 5 has higher permeability. Hereinafter, the permeability to flow through the cleaning elements is referred to as permeability. The direction of motion 9 of the cleaning elements 7 is either toward the plane of the figure (illustrated by a square) or away from the plane of the figure (illustrated by a circle). In this specific example, the directions of motion 9 are opposite to each other. In an alternative embodiment, the directions of motion 9 may be the same direction to each other. In addition to the slit opening 6, there is a collection unit 10 that can collect contaminating particles 4. This is particularly advantageous in situations where the contaminating particles 4 have a larger mass and cannot be completely sucked up by the suction device 2, and accumulate in the suction device 2. Contaminating particles 4 with a larger mass, and therefore that cannot be sucked up by the suction device 2, accumulate in the collection unit 10. The concentration of contaminating particles 4 increases in the collection unit 10. Preferably, the collection unit 10 is emptied manually, i.e., by hand. Alternatively, the collection unit 10 can be emptied automatically by a discharge device (not shown herein).

[0059] Figure 4 is a perspective view of a cleaning device 1 equipped with mirror-symmetric cleaning elements 7 on both sides of a surface 3. The arrows symbolize the contaminated surface 3 moving in the transport direction 5. In this specific example, four cleaning elements 7 are formed with stepped sections 13, and these cleaning elements 7 have equal permeability to one another. In an alternative embodiment, the cleaning elements 7 positioned upstream in the transport direction 5 have higher permeability. Thus, contaminated particles 4 can be efficiently sucked up through the bristle belt 8 and accelerated towards the suction device 2 (not shown in Figure 4). In this specific example, the directions of motion 9 of the cleaning elements 7 are opposite to each other. In an alternative embodiment, the directions of motion 9 of the cleaning elements 7 may be the same to each other.

[0060] The different permeability of the cleaning elements 7 may be achieved by the flow channels 11. The flow channels 11 are arranged laterally with respect to the direction of movement 9 of the cleaning elements 7 and are preferably formed in a straight line.

[0061] Figure 5 shows a detailed view of the cleaning element 7. The cleaning element 7 has a stepped portion 13. In the region in front of the stepped portion 13 when viewed in the direction of movement 9, the bristles 12 of the cleaning element 7 are lifted from the contaminated surface 3. This prevents the cleaning element 7 from damaging the surface 3 during operation. The surface 3 is illustrated as a line in this specific example.

[0062] Figure 6 is a perspective view of the cleaning apparatus 1 shown in Figure 4, which is equipped with a suction device 2 that is mirror-symmetrical to both sides of the surface 3. The suction device 2 has a slit opening 6 through which contaminated particles 4 are sucked in. In addition to the slit opening 6, a collection unit 10 is formed. The larger arrows symbolize the transport direction 5 of the contaminated surface 3, while the arrows of medium size symbolize the direction of movement 9 of the cleaning element 7. The smallest arrows represent the flight path of the contaminated particles 4 within the suction device 2. In this case, the direction of movement 9 is lateral to the transport direction 5.

[0063] Figure 7 shows a side view of the cleaning device 1 shown in Figure 6. In this case, the cleaning element 7 located on the upstream side when viewed in the transport direction 5 has higher permeability than the cleaning element 7 located on the downstream side. The different permeability of the cleaning elements 7 may be achieved by the flow path 11. The flow path 11 is located laterally with respect to the direction of movement 9 of the cleaning elements 7 and is preferably formed in a straight line. The cleaning device 1 is arranged mirror-symmetrically on both sides of the contaminated surface 3.

[0064] Figure 8 shows a side view of a cleaning device 1 having three or more cleaning elements 7 that act mirror-image symmetrically on both sides of a contaminated surface 3. The cleaning elements 7 positioned upstream in the transport direction 5 move in opposite directions to each other. Similarly, the cleaning elements 7 positioned downstream also move in opposite directions to each other. A suction device 2 is positioned between the cleaning elements 7. Figure 8 illustrates a total of eight cleaning elements 7. Contaminated particles 4 are sucked up in a hyperbolic flight path and enter the suction device 2.

[0065] Figure 9 is a perspective view of a cleaning apparatus 1 in which the cleaning elements 7 have equal permeability to each other. A suction device 2 (illustrated symbolically in Figure 9) is positioned between the cleaning elements 7. The permeability of the cleaning elements 7 is achieved by a flow path 11. The flow path 11 is positioned laterally to the direction of motion 9 of the cleaning elements 7 and is preferably formed in a straight line. The cleaning elements 7, formed as a bristle belt 8, either move in the same direction or in opposite directions. The flow path 11 is formed by multiple bristles 12 of different lengths or by sections without bristles. Whether the cleaning elements 7 move in the same direction or in opposite directions is determined by the surface 3 to be cleaned, the contaminating particles 4, and the degree of contamination. The suction device 2 is positioned above the surface 3 to be cleaned and perpendicular to the surface 3. The suction device 2 is positioned along the normal vector of the surface 3.

[0066] The arrows indicating the direction of motion 9 are drawn to illustrate both cases: cleaning elements 7 moving in the same direction and cleaning elements 7 moving in opposite directions.

[0067] Figure 10 is a perspective view of a cleaning apparatus 1 in which the cleaning elements 7 have different permeability to each other. The cleaning elements 7 are formed as bristle belts 8. In this case, the cleaning elements 7 located upstream when viewed in the conveying direction 5 have higher permeability than the cleaning elements 7 located downstream. The cleaning elements 7 located downstream are formed as bodies completely covered with bristles and do not have a flow path 11. The cleaning elements 7 are configured to move in opposite directions or in the same direction to each other. Whether the cleaning elements 7 move in opposite directions or in the same direction is determined by the surface 3 to be cleaned, the contaminating particles 4, and the degree of contamination.

[0068] Figures 7 and 8 show that the suction device 2 has a slit opening 6 with a width B1 smaller than the distance B2 between at least two cleaning elements 7, and that contaminated particles 4 can be sucked up through this slit opening 6. It is also observed that the slit opening 6 has a longitudinal extension length L1 that is greater than half, and in particular greater than three-quarters, of the length L2 of at least one of the cleaning elements 7. In this case, the longitudinal extension length L1 is measured from the start end to the end of the slit opening 6, which consists of multiple parts, without considering interruptions.

[0069] In a cleaning device 1, which comprises at least two cleaning elements 7 that are spaced apart from each other and rotatable, and which have movable bristles 12, it is proposed that a suction device 2 is positioned between the at least two cleaning elements 7. [Explanation of symbols]

[0070] 1. Cleaning device 2. Suction device 3 surface 4. Contaminated particles 5. Conveying direction 6 Slit openings 7 Cleaning elements 8 Bristle Belt 9 Direction of motion 10 Collection Units 11 channels 12 Bristles 13 Step section L1 Longitudinal extension length L2 Length B1 width B2 interval

Claims

1. A cleaning device (1) comprising at least two cleaning elements (7) that are spaced apart from each other and movable, in particular rotatable, wherein the cleaning elements (7) have movable bristles (12), A cleaning device (1) characterized in that a suction device (2) is arranged between the at least two cleaning elements (7).

2. A cleaning device (1) comprising at least two cleaning elements (7) that are spaced apart from each other and movable, in particular rotatable, wherein the cleaning elements (7) have movable bristles (12), The cleaning apparatus (1) according to claim 1, wherein the at least two cleaning elements (7) have different permeability to each other, particularly with respect to fluids.

3. The cleaning apparatus (1) according to claim 1 or 2, characterized in that it is provided with a conveying device (5) that moves a contaminated surface (3) in a conveying direction (5) relative to the cleaning element (7).

4. The cleaning apparatus (1) according to any one of claims 1 to 3, characterized in that the at least two cleaning elements (7) are formed as bristle rollers and / or as bristle belts (8).

5. The cleaning apparatus (1) according to any one of claims 1 to 4, characterized in that a negative pressure is generated between the at least two cleaning elements (7), particularly by the suction device (2).

6. The cleaning device (1) according to any one of claims 1 to 5, characterized in that the distance between the bristles (12) and the contaminated surface (3) is not constant in a predetermined, particularly lateral, region of the surface (3).

7. The cleaning device (1) according to any one of claims 1 to 6, characterized in that the cleaning element (7) moves laterally with respect to the transport direction (5) of the contaminated surface (3), particularly in a direction of motion (9) that is perpendicular to it.

8. A cleaning apparatus (1) according to any one of claims 1 to 7, characterized in that one of the at least two cleaning elements (7) has a flow path (11) that is perpendicular to the transport direction (5) of the contaminated surface (3) and / or perpendicular to the direction of movement (9) of the at least two cleaning elements (7).

9. The cleaning apparatus (1) according to any one of claims 1 to 8, characterized in that the at least two cleaning elements (7) have equal permeability to each other.

10. The cleaning device (1) according to any one of claims 1 to 9, characterized in that the flow path (11) is formed by a plurality of bristles (12) of different lengths, or by a portion without bristles.

11. The cleaning device (1) according to any one of claims 1 to 10, characterized in that the cleaning elements (7) move in opposite or the same direction to each other, and in particular, the direction of motion (9) of the cleaning elements (7) or the direction of motion (9) is the same or opposite to each other.

12. In particular, the cleaning apparatus (1) according to any one of claims 1 to 11, characterized in that it is positioned at the reversal point of the cleaning element (7) and / or has a doctor blade that contacts the cleaning element (7) and scrapes off contaminating particles (4) from the cleaning element (7), especially the bristles (12).

13. The cleaning apparatus (1) according to any one of claims 1 to 12, wherein the doctor blade has a separate suction unit, the suction unit suctions up contaminated particles (4) scraped off by the doctor blade.

14. The cleaning apparatus (1) according to any one of claims 1 to 13, wherein the at least two cleaning elements (7) each have a flow path (11) with different dimensions and permeability, and in particular, the flow path (11) is arranged in the direction of motion (9) of the cleaning element (7) or laterally with respect to the direction of motion (9).

15. The cleaning device (1) according to any one of claims 1 to 14, characterized in that the flow path (11) is formed in a straight line.

16. A cleaning device (1) according to any one of claims 1 to 15, characterized in that the angle α between the longitudinal axis of the flow path (11) and the width of the cleaning element (7) is between 0° and 60°.

17. The cleaning apparatus (1) according to any one of claims 1 to 16, characterized in that the suction device (2) has a collection unit (10) for collecting contaminating particles (4).

18. The cleaning apparatus (1) according to any one of claims 1 to 17, characterized in that the cleaning element (7) positioned upstream in the transport direction (5) of the contaminated surface (3) has higher permeability than the cleaning element (7) positioned downstream.

19. The cleaning device (1) according to any one of claims 1 to 18, characterized in that the angle α between the longitudinal axis of the flow path (11) and the width of each of the at least two cleaning elements (7) is of different magnitudes.

20. The cleaning device (1) according to any one of claims 1 to 19, characterized in that the suction device (2) has a slit opening (6) having a width (B1) smaller than the distance (B2) between the at least two cleaning elements (7), and contaminating particles (4) can be sucked up through the slit opening (6), and / or the slit opening (6) or the slit opening (6) formed for sucking up contaminating particles (4) has a longitudinal extension length (L1) that is greater than half of the length (L2) of at least one of the cleaning elements (7), particularly greater than three-quarters.

21. The cleaning device (1) according to any one of claims 1 to 20, characterized in that the suction device (2) has a funnel-shaped base, and a slit opening (6) and a collection unit (10) are formed at the bottom of the base adjacent to the slit opening (6).

22. The cleaning apparatus (1) according to any one of claims 1 to 21, characterized in that the at least two cleaning elements (7) are arranged mirror-image symmetrically on both sides of the contaminated surface (3).

23. A cleaning device (1) according to any one of claims 1 to 22, characterized in that two suction devices (2) are formed and are arranged mirror-image symmetrically on both sides of a contaminated surface (3).

24. A cleaning apparatus (1) according to any one of claims 1 to 23, characterized in that the transport direction (5) of the contaminated surface (3) and the direction of motion (9) of the cleaning element (7) or the direction of motion (9) are arranged laterally to each other, particularly orthogonally.

25. The cleaning apparatus (1) according to any one of claims 1 to 24, characterized in that at least two cleaning elements (7) have stepped portions (13), and in the region in front of the stepped portions (13), the bristles (12) of the cleaning element (7) are lifted from the contaminated surface (3).

26. A method for cleaning a contaminated surface (3), wherein a cleaning apparatus (1) according to any one of claims 1 to 25 is formed, and contaminating particles (4) are guided by at least two cleaning elements (7) having bristles (12) that are permeable and movable in a different manner, and sucked up by a suction device (2) located between the at least two cleaning elements (7).

27. The method according to claim 26, characterized in that contaminating particles (4) are removed from the at least two cleaning elements (7) by a doctor blade that contacts the at least two cleaning elements (7) at its end.

28. The method according to claim 26 or 27, characterized in that the bristles (12) of the cleaning element (7) are led out from a predetermined cleaning area for cleaning the bristles (12) themselves.

29. The method according to any one of claims 26 to 28, wherein the contaminating particles (4) are redirected from the transport direction (5) by the suction device (2) in the region between the cleaning elements (7), and in particular, the flight path is a hyperbolic trajectory.

30. The method according to any one of claims 26 to 29, characterized in that the contaminating particles (4) are accelerated through the at least two cleaning elements (7), particularly in the direction of the suction device (2).

31. Use of the cleaning apparatus (1) according to any one of claims 1 to 25 for cleaning a moving contaminated surface (3) and / or for conveying particles on the surface (3).

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