EP4162852A2 - Vacuum cleaner with side brush - Google Patents

Abstract

The present invention relates to a vacuum cleaner (1) with an underside (7) facing a surface to be cleaned during operation and a side brush (6) arranged on the underside (7) with at least one tuft of brushes (11), the side brush (6) in arranged in a corner area (10) of the underside (7) and can be rotated about an axis of rotation (8) running transversely or at an angle to the ground. An improved cleaning effect and simple relocation of the vacuum cleaner (1) are achieved in that the vacuum cleaner (1) is Corner area (10) has a side suction mouth (13) which is set back in height from the at least one brush tuft (11) with respect to the substrate (3) to be cleaned, which is spaced at least in sections from the axis of rotation (8) and via which air is sucked in during operation by means of a suction device .

Description

The present invention relates to a vacuum cleaner, in particular a vacuum robot, for cleaning a substrate, which has a side brush that rotates during operation on an underside facing the substrate.

Vacuum cleaners are used to clean a surface. For this purpose, vacuum cleaners usually have a suction opening on an underside facing the substrate to be cleaned, through which dirt is sucked off.

From the DE 10 2007 060 750 A1 a vacuum cleaner designed as a vacuum robot is known, in which the suction opening is attached to a trunk that can be pivoted on the underside. The snout can thus be adjusted in the direction of a corner of the substrate to be cleaned, hereinafter also referred to as the corner of the room, and thus clean the corner of the room.

In the DE 10 2015 114 775 A1 it is proposed to provide a rolling brush in addition to the suction opening of a vacuum robot on the underside, which is arranged in a corner of the underside. The rolling movement of the roller brush can move dirt from the area of the roller brush to the suction opening.

From the EP 2 891 442 A2 a vacuum robot is known in which the suction opening is arranged in a front area of the underside and can be moved along the surface to be cleaned in order to be able to suck off a corner of the surface to be cleaned better and thus be able to clean it.

From the DE 10 2016 110 817 A1 a vacuum cleaner designed as a vacuum robot is known, which has a side brush arranged in the corner region of the underside on an underside facing the ground. During operation, the side brush rotates by means of a drive device about an axis of rotation running transversely to the subsurface. The vacuum cleaner also has a turntable spaced apart from the side brush, which has its own rotating plate running transversely to the surface to be cleaned axis rotates. The turntable has suction nozzles which are circumferentially spaced apart from one another around the axis of the turntable.

In the JP 2013 - 233 305 A it is proposed to attach a suction mouth to the side of a vacuum robot in order to suck off side rails in a room.

From the EP 2 561 783 A2 it is known to provide an open channel in a vacuum robot for edge cleaning. An additional vacuum cleaner is inserted into the open channel to clean the edges.

The present invention is concerned with the task of specifying an improved or at least different embodiment for a vacuum cleaner of the type mentioned above, which embodiment eliminates the disadvantages of solutions known from the prior art. In particular, the present invention is concerned with the task of providing a vacuum cleaner which is characterized by improved cleaning of corners of a substrate to be cleaned and simplified implementation.

According to the invention, this object is achieved by the subject matter of independent claim 1 . Advantageous embodiments are the subject matter of the dependent claims.

The present invention is therefore based on the general idea of providing a suction mouth in the area of a side brush of a vacuum cleaner, in particular a robotic vacuum cleaner, which is offset forward relative to a rotation axis of the side brush in the direction of travel and via which air is sucked in during operation. As a result, dust whirled up by the side brush is sucked off by means of the suction mouth during operation. In addition, even smaller dirt particles can be sucked off with the suction mouth. This results in improved cleaning of areas close to walls and corners of a substrate to be cleaned, with the vacuum cleaner being implemented in a simplified manner at the same time.

According to the idea of the invention, the vacuum cleaner has a suction device and a dirt container for cleaning the underground. The suction device sucks in air during operation. The vacuum cleaner also has a side brush. The Side brush is arranged on an underside facing the surface to be cleaned during operation and in a front corner region of the underside of the vacuum cleaner in the direction of travel. The side brush can be rotated about an axis running transversely or at an angle to the ground, which is also referred to below as the axis of rotation. The side brush has at least one protruding brush tuft. During operation, a drive device rotates the side brush about the axis of rotation. Thus, the at least one tuft of brushes also rotates about the axis of rotation during operation. The vacuum cleaner also has a suction mouth in the corner area, which is also referred to below as a side suction mouth. The side suction nozzle is set back in height from the at least one brush tuft, in particular from the side brush, with respect to the surface to be cleaned and is spaced at least in sections from the axis of rotation. At least one of the at least one brush tufts, advantageously the respective brush tuft, protrudes beyond the lateral suction mouth transversely to the axis of rotation during rotation about the axis of rotation. A flow path, also referred to below as a secondary flow path, leads from the side suction mouth to the dirt container, so that the suction device sucks dirt into the dirt container via the side suction mouth during operation.

Advantageously, the axis of rotation of the side brush runs transversely to the ground and thus in a vertical direction.

In principle, the vacuum cleaner can have any configuration.

Advantageously, the vacuum cleaner is a vacuum robot that moves at least partially autonomously over a surface and cleans it.

The vacuum cleaner expediently has a housing. The underside is preferably a wall of the housing. That is, the side suction mouth can be formed in the case at the bottom.

The suction device and the dirt container are advantageously accommodated in the housing.

The vacuum cleaner expediently has at least one locomotion device, so that the vacuum cleaner can be moved in the direction of travel over the surface to be cleaned. The direction of travel is in particular that direction in which the vacuum cleaner moves when driving straight ahead.

At least one wheel or roller is driven in a vacuum robot.

In the present case, the subsurface is to be understood as meaning an even and flat subsurface, unless otherwise stated.

In principle, the underside can have any shape.

The underside advantageously has a D-shaped configuration. This means that the contour of the underside has a curved section and a flat section. The flat section is preferably oriented transversely to the direction of travel. It is also preferred if the flat section is arranged in front of the curved section in the direction of travel. That is, the side brush is preferably arranged in the flat portion in a corner area. The side brush, in particular the at least one tuft of brushes, thus reaches, in a simplified manner, corners of the substrate to be cleaned, also referred to below as room corners. This results in an improved cleaning effect of the vacuum cleaner.

The vacuum cleaner expediently has a main suction mouth on the underside in addition to the side suction mouth, via which dirt is sucked in during operation and the subsurface is thus cleaned. The main suction mouth is advantageously spaced apart from the side suction mouth.

In preferred embodiments, a flow path associated with the main suction mouth leads from the main suction mouth to the dirt container, the flow path also being referred to below as the main flow path. During operation, the suction device preferably sucks dirt into the dirt container via the main suction mouth. This means in particular that a common suction device sucks in air and consequently dirt both via the main suction mouth and via the side suction mouth. In this way, the structure of the suction device is simplified. Furthermore prevails in this way a coupling between the flow via the main suction mouth and the side suction mouth.

The main suction mouth is expediently larger than the side suction mouth. This means that a cross section of the side suction mouth is expediently smaller than a cross section of the main suction mouth. The flow speed of the air at the side suction mouth is therefore greater than at the main suction mouth, in particular when the common suction device sucks in air via both suction mouths.

In the present case, the suction mouth is expediently understood to mean the opening on the underside, via which dirt gets into a channel delimiting the associated flow path during operation. This means, in particular, that the secondary flow path is delimited by a duct, which is also referred to below as the secondary feed duct and which opens into the side suction mouth on the underside. In addition, the main flow path is delimited by a channel, which is also referred to below as the main feed channel and which opens into the main suction mouth on the underside.

It is preferred if the flow cross section of the secondary supply channel is smaller than the flow cross section of the main supply channel. This also means that the flow velocities are greater along the secondary flow path than along the main flow path.

Embodiments are advantageous in which the main suction mouth extends longitudinally along the underside, preferably transversely to the direction of travel. In particular, it is conceivable to arrange the main suction mouth off-centre transversely to the direction of travel, advantageously offset towards the side brush. This improves the cleaning of room corners.

It is preferred if the main suction mouth is shifted forward eccentrically in the direction of travel. In this way, a cleaning effect of areas close to the wall of the substrate to be cleaned is improved.

Embodiments are advantageous in which the main suction mouth is set back from the axis of rotation of the side brush in the direction of travel. That means that the Axis of rotation is arranged offset in the direction of travel at least eccentrically of the main suction mouth. In particular, the axis of rotation can be spaced apart from the main suction mouth in the direction of travel. It is thus possible, in particular, to move dirt particles swept by the side brush in the direction of the main suction mouth, so that the main suction mouth sucks them in easily and effectively.

A brush roller for conveying dirt into the main suction mouth can be arranged in the main suction mouth. The brush roller is advantageously rotatable about an axis which is parallel to the ground and thus in particular runs transversely to the axis of rotation of the side brush, which is also referred to below as the rolling axis. The roll axis preferably runs transversely to the direction of travel.

Embodiments are considered to be advantageous in which the side suction mouth is set back from the main suction mouth with respect to the substrate to be cleaned. This means that the side suction mouth is further away from a flat and level surface than the main suction mouth, i.e. it is offset in height to the main suction mouth. In particular, this results in advantages when cleaning carpets or carpet-like substrates. In the case of such subsurfaces, the subsurface penetrates towards the main suction mouth, in particular into the main suction mouth, whereas the side suction mouth is free or at least freer than the main suction mouth. This means that dirt can continue to be sucked in with the side suction mouth. The penetration of the ground into the main suction mouth also seals the main suction mouth at least in sections. If a common suction device is used, this results in an increased flow speed in the side suction mouth due to the at least partial sealing of the main suction mouth. Consequently, the cleaning effect, particularly in room corners, is improved, particularly on carpet-like surfaces on which the rotating side brush is less able to transport dust and/or dirt to the main suction mouth than on smooth surfaces. Improved intake of dust that is thrown up is also achieved by means of the height-offset side suction mouth.

In advantageous embodiments, the vacuum cleaner has on the underside in the corner area protruding and fixed bristles which surround the suction mouth in some areas. The bristles are also referred to below as referred to as boundary bristles. The limiting bristles are preferably arranged in front of the side suction mouth in the direction of travel and/or arranged transversely to the direction of travel to the side of the side suction mouth, so that the limiting bristles at least reduce an air flow through the limiting bristles to the side suction mouth. The lateral suction mouth is thus sealed frontally and/or laterally by means of the limiting bristles, so that the lateral suction mouth sucks in air predominantly parallel to the axis of rotation during operation. This results in an improved cleaning effect, especially of room corners.

The delimiting bristles advantageously at least partially surround the lateral suction mouth.

The limiting bristles are preferably positioned in front of the side suction mouth in the direction of travel and are arranged laterally to the side of the side suction mouth transversely to the direction of travel. The limiting bristles are advantageously arranged in an L-shape or U-shape. The delimiting bristles can also surround the side suction mouth in a closed manner.

At least one of the at least one brush tufts, preferably the respective brush tuft, is advantageously dimensioned in such a way that it protrudes beyond the side suction mouth and/or protrudes from the housing when rotating about the axis of rotation. This results in improved cleaning of room corners and areas close to walls.

The housing thus has an outermost side transverse to the axis of rotation, with at least one of the at least one brush tufts, preferably the respective brush tuft, advantageously protruding from the outside transverse to the axis of rotation during rotation about the axis of rotation.

Alternatively or additionally, preferably additionally, at least one of the at least one brush tufts, advantageously the respective brush tuft, protrudes beyond the side suction mouth when rotating about the axis of rotation.

Embodiments are considered to be advantageous in which at least one of the at least one brush tufts, preferably the respective brush tuft, protrudes beyond the limiting bristles during rotation about the axis of rotation transversely to the axis of rotation.

In principle, the limiting bristles are spaced apart from the at least one brush tuft along or parallel to the axis of rotation and thus in the vertical direction.

In advantageous embodiments, some of the limiting bristles protrude so far towards the ground that at least one of the at least one brush tufts, preferably the respective brush tuft, brushes along the part of the limiting bristles when rotating about the axis of rotation. This results in a cleaning of the respective brush tuft with the part of the delimiting bristles that protrudes further.

In preferred embodiments, at least one of the at least one brush tufts, preferably the respective brush tuft, overlaps at least in sections with the main suction mouth during rotation about the axis of rotation. Thus, dirt particles are conveyed directly to the main suction mouth by means of the respective brush tuft. This results in an improved cleaning effect, especially of room corners and areas close to walls.

The vacuum cleaner generally has a single dirt container to which the secondary flow path and the main flow path lead.

Of course, the vacuum cleaner can also have two or more dirt containers. In this case, the secondary flow path and the main flow path each lead to at least one of the dirt containers.

The side brush is advantageously accommodated in the vacuum cleaner in a detachable manner. This means that the side brush can be removed from the vacuum cleaner if necessary, for example to clean or replace it.

In principle, the vacuum cleaner can be designed in such a way that the suction device permanently sucks in air via the side suction mouth and the main suction mouth during operation.

The vacuum cleaner preferably has a device which is designed in such a way that it selectively opens and blocks the secondary flow path and/or the main flow path. Thus, the available suction power of the suction device can optionally be increased, in particular exclusively, at the side suction mouth or at the main suction mouth issue. As a result, it is possible, for example, to block the secondary flow path if the vacuum cleaner is not currently cleaning a corner of the room and/or an area close to a wall. It is also possible to block the main flow path if the vacuum cleaner is currently cleaning a corner of the room and/or an area close to a wall. Thus, when cleaning the corner of the room, an increased suction power, in particular the entire suction power, can be provided via the side suction mouth. This leads to an improved cleaning effect.

It goes without saying that the vacuum cleaner can also have two or more such side brushes. For at least two of the side brushes, one associated side suction mouth of this type can be provided.

Further important features and advantages of the invention result from the dependent claims, from the drawings and from the associated description of the figures with reference to the drawings.

It goes without saying that the features mentioned above and those still to be explained below can be used not only in the combination specified in each case, but also in other combinations or on their own, without departing from the scope of the present invention.

Preferred exemplary embodiments of the invention are illustrated in the drawings and are explained in more detail in the following description, with the same reference numbers referring to identical or similar or functionally identical components.

Figur 1

eine Draufsicht auf eine Unterseite eines Staubsaugers mit einer Seitenbürste,

Figur 2

eine isometrische, teilweise transparente Ansicht des Staubsaugers,

Figur 3

eine vergrößerte Ansicht des in Figur 1 mit III bezeichneten Bereichs,

Figur 4

einen Schnitt durch den Staubsauger im Bereich der Seitenbürste,

Figur 5

eine isometrische Ansicht des Staubsaugers hin zur Seitenbürste bei einem anderen Ausführungsbeispiel,

Figur 6

die Ansicht aus Figur 4 beim Ausführungsbeispiel der Figur 5.

They show, each schematically:

figure 1

a top view of an underside of a vacuum cleaner with a side brush,

figure 2

an isometric, partially transparent view of the vacuum cleaner,

figure 3

an enlarged view of the in figure 1 area marked III,

figure 4

a cut through the vacuum cleaner in the area of the side brush,

figure 5

an isometric view of the vacuum cleaner towards the side brush in another embodiment,

figure 6

the view off figure 4 in the embodiment of figure 5 .

A vacuum cleaner 1, as for example in the Figures 1 to 6 is shown, is used to clean a substrate 3 (see figure 4 ). In the exemplary embodiments shown, the vacuum cleaner 1 is designed as a vacuum robot 2 which, during operation, moves at least partially autonomously over the substrate 3 to be cleaned and cleans it. The vacuum cleaner 1 has for this purpose how figure 2 can be removed, a suction device 4, which sucks in air during operation. In addition, the vacuum cleaner 1 has at least one dirt container 5 . In the exemplary embodiments shown, the vacuum cleaner 1 has a dirt container 5 . The vacuum cleaner 1 also has a side brush 6 which is arranged on an underside 7 of the vacuum cleaner 1 which faces the substrate 3 to be cleaned during operation, such as in particular the figures 1 as well as 3 to 6 can be taken. The vacuum cleaner 1 has a housing 12 which has the underside 7 . The side brush 6 can be rotated about an axis of rotation 8 running transversely or at an incline to the base 3 . A flat and level subsurface 3 is assumed here. Of course, the vacuum cleaner 1 can also clean uneven surfaces 3, such as a rug or carpeted floor. This means in particular that the axis of rotation 8 runs vertically and the underside 7 runs horizontally. Here is how in particular figure 3 can be removed, the side brush 6 is arranged in a front corner region 10 of the underside 7 in a direction of travel 9 of the vacuum cleaner 1 . The direction of travel 9 is the direction along which the vacuum cleaner 1 travels to clean the substrate 3 . The direction of travel 9 thus runs parallel to the ground 3, in particular horizontally. How in particular figure 4 can be removed, the side brush 6 has at least one protruding brush tuft 11 . In the exemplary embodiments shown, the side brush 6 has three such bristle tufts 11 which are circumferentially spaced from one another around the axis of rotation 8 . In the exemplary embodiments shown, the brush tufts 11 are equidistant from one another and are therefore spaced at a distance of 120°. During operation, the side brush 6 is rotated about the axis of rotation 8 by means of a drive device (not shown), for example an electric motor.

The housing 12 has an outermost outside 22 transverse to the axis of rotation 8 . The respective brush tuft 11 protrudes from the outside 22 transversely to the axis of rotation 8 during rotation about the axis of rotation 8 .

Like the one in particular Figures 3 and 4 can be removed, the vacuum cleaner 1 in the corner area 10 has a side suction mouth 13 that is set back in height with respect to the substrate 3 to be cleaned by the at least one brush tuft 11, in the exemplary embodiments shown with respect to the entire side brush 6. In other words, the side suction mouth 13 is offset upwards relative to the at least one brush tuft 11, in the exemplary embodiments shown relative to the side brush 6. In addition, the side suction mouth 13 is at a distance from the axis of rotation 8 . It towers over how in particular figure 3 can be removed, at least one of the at least one brush tufts 11, in the exemplary embodiments shown the respective brush tuft 11, during rotation about the axis of rotation 8 the lateral suction mouth 13 transversely to the axis of rotation 8. In the exemplary embodiments shown, the lateral suction mouth 13 is from the axis of rotation 8 in the direction of travel 9 arranged offset forward and extends transversely to the direction of travel 9 oblong. The suction mouth 13 is therefore positioned in front of the axis of rotation 8 in the direction of travel 9 . How in particular figure 4 can be removed, a flow path 14 leads from the side suction mouth 13 to the dirt container 5, so that the suction device 4 sucks dirt into the dirt container 5 via the side suction mouth 13 along the flow path 14 during operation. The flow path 14 is also referred to below as the secondary flow path 14 . The side brush 6 thus reliably cleans areas close to the wall and corners of the substrate (each not shown). In addition, the vacuum cleaner 1 reliably sucks in dust thrown up by the side brush 6 during operation. Overall, the cleaning effect of the vacuum cleaner 1 is thus improved.

figure 2 shows an isometric view of the vacuum cleaner 1 towards the side facing away from the underside 7 . In this case, the housing 12 is shown partially transparent, so that in particular the suction device 4 and the dirt container 5 are visible.

Like for example figure 1 can be removed, the underside 7, in particular the housing 12, formed D-shaped in the illustrated embodiments. The side brush 6 and the side suction mouth 13 are arranged in a flat section of the D-shaped contour of the underside 7 transversely to the direction of travel 9 .

The vacuum cleaner 1 has, in particular the figures 1 and 5 can be removed, on the underside 7 has a main suction mouth 15, which is spaced apart from the side suction mouth 13 in the exemplary embodiments shown. The main suction mouth 15 extends longitudinally along the underside 7 transversely to the direction of travel 9 . The main suction mouth 15 is set back from the axis of rotation 8 in the direction of travel 9, as in particular figure 3 can be removed. A flow path 16, which is also referred to below as the main flow path 16, leads from the main suction mouth 15 to the dirt container 5, so that the suction device 4 sucks dirt into the dirt container 5 via the main suction mouth 15 and the main flow path 16 during operation. In the embodiments shown, the vacuum cleaner 1, in particular the figures 1 and 3 can be removed, in the main suction mouth 15 a brush roller 17 which rotates during operation about an axis 18 parallel to the base 3 and running transversely to the direction of travel 9 . The axis 18 is also referred to below as the roll axis 18 . The roll axis 18 runs transversely to the axis of rotation 8 and transversely to the direction of travel 9. Such as, for example figure 1 can be seen, a cross section of the main suction mouth 15 is larger than the cross section of the side suction mouth 13. In the exemplary embodiments shown, the main flow path 16 is delimited by a main feed channel 19 and the secondary flow path 14 by a secondary feed channel 20 (see figures 2 and 4 ). The main feed channel 19 is larger than the secondary feed channel 20 with regard to the cross section through which flow can take place figure 3 can be removed.

How in particular figure 4 can be removed, in the exemplary embodiments shown, the side suction mouth 13 is set back from the main suction mouth 15 with respect to the substrate 3 to be cleaned and is therefore arranged at a height offset. This means that the side suction mouth 13 is arranged higher than the main suction mouth 15, as in FIG figure 4 is illustrated with dashed lines.

Like the one in particular Figures 3 to 6 can be removed, the vacuum cleaner 1 in the illustrated embodiments on the underside 7 in the corner area 10 towards the ground 3 protruding and fixed boundary bristles 21. The limiting bristles 21 protrude beyond the lateral suction mouth 13 in the direction of the ground 3 and are positioned in front of the lateral suction mouth 13 in the direction of travel 9 and/or at least partially surround the lateral suction mouth 13 . As a result, the limiting bristles 21 reduce an air flow through the limiting bristles 21 to the side suction mouth 13. The limiting bristles 21 thus seal the side suction mouth 13 laterally, so that air is sucked in at least predominantly from below via the side suction mouth 13 during operation. In the exemplary embodiment shown, the limiting bristles 21 are arranged in an L-shape and are arranged in front of the side suction mouth 13 in the direction of travel 9 and transversely to the direction of travel 9 to the side of the side suction mouth 13 . The respective brush tuft 11 projects beyond the limiting bristles 21 during rotation about the axis of rotation 8 transversely to the axis of rotation 8, in particular the Figures 3, 4 and 6 can be removed.

When in the Figures 1 to 4 shown embodiment, the limiting bristles 21, such as in particular figure 4 can be removed, equal lengths and are spaced along the axis of rotation 8 to the brush tufts 11. That in the Figures 5 and 6 shown embodiment differs from that in the Figures 1 to 4 shown embodiment in that part of the boundary bristles 21 protrudes so far towards the substrate 3 that at least one of the at least one brush tuft 11 touches the part of the boundary bristles 21 along with rotation about the axis of rotation 8 and is thus cleaned. In the exemplary embodiment shown, the innermost two limiting bristles 21 located in front of the side suction mouth 13 in the direction of travel 9 are longer.

Reference List

1

Vacuum cleaner

2

vacuum robot

3

underground

4

suction device

5

dirt container

6

side brush

7

bottom

8th

axis of rotation

9

driving direction

10

corner area

11

brush tuft

12

Housing

13

side suction mouth

14

bypass flow path

15

main suction mouth

16

main flow path

17

brush roller

18

roll axis

19

main feed channel

20

auxiliary feed channel

21

boundary bristles

22

outside

Claims (10)

Vacuum cleaner (1), in particular a vacuum robot (2), for cleaning a substrate (3), with a suction device (4) which sucks in air during operation; with at least one dirt container (5); with a side brush (6), which is arranged on an underside (7) of the vacuum cleaner (1) that faces the surface (3) to be cleaned during operation, the side brush (6) about an axis of rotation running transversely or inclined to the surface (3). (8) can be rotated, with the side brush (6) being arranged in a front corner region (10) of the underside (7) in a direction of travel (9) of the vacuum cleaner (1), with the side brush (6) having at least one protruding brush tuft (11 ) having; with a drive device (12) which, during operation, rotates the side brush (6) about the axis of rotation (8); characterized in that the vacuum cleaner (1) in the corner area (10) has a side suction mouth (13) which is set back from the at least one brush tuft (11), in particular from the side brush (6), with respect to the subsurface (3) to be cleaned, which towards the axis of rotation (8) is at least partially spaced; that at least one of the at least one brush tufts (11) protrudes beyond the lateral suction mouth (13) transversely to the axis of rotation (8) during rotation about the axis of rotation (8); that a secondary flow path (14) leads from the side suction mouth (13) to at least one of the at least one dirt container (5), so that during operation the suction device (4) sucks dirt into at least one of the at least one dirt container (5) via the side suction mouth (13). Vacuum cleaner according to Claim 1, characterized in that the underside (7) is D-shaped and the side brush (6) and the side suction mouth (13) are arranged in a flat section of the underside (7) transverse to the direction of travel (9). Vacuum cleaner according to Claim 1 or 2, characterized in that the vacuum cleaner (1) has on the underside (7) a main suction mouth (15) which extends longitudinally along the underside (7); that a main flow path (16) leads from the main suction mouth (15) to at least one of the at least one dirt container (5), so that the suction device (4) dirt over during operation sucks the main suction mouth (15) into at least one of the at least one dirt container (5). Vacuum cleaner according to Claim 3, characterized in that the side suction mouth (13) is arranged set back from the main suction mouth (15) with respect to the substrate (3) to be cleaned. Vacuum cleaner according to one of Claims 1 to 4, characterized in that on the underside (7) in the corner area (10) protruding and fixed delimiting bristles (21) are arranged towards the subsurface (3) which extend the side suction mouth (13) in the direction of the subsurface (3) and in front of the side suction mouth (13) in the direction of travel (9) and/or at least partially surround the side suction mouth (13), so that the limiting bristles (21) reduce an air flow through the limiting bristles (21) to the side suction mouth (13). Vacuum cleaner according to Claim 5, characterized in that at least one of the at least one brush tufts (11) of the side brush (6) protrudes beyond the limiting bristles (21) when rotating about the axis of rotation (8) transversely to the axis of rotation (8). Vacuum cleaner according to Claim 5 or 6, characterized in that part of the delimiting bristles (21) protrudes so far towards the base (3) that at least one of the at least one brush tufts (11) on rotation about the axis of rotation (8) on the part of the delimiting bristles (21) roams along. Vacuum cleaner according to one of Claims 3 to 7, characterized in that a main feed channel (19) delimits the main flow path (16) and a secondary feed channel (20) delimits the secondary flow path (14); that the main feed duct (19) is larger than the secondary feed duct (20) with regard to the flowable cross section. Vacuum cleaner according to one of Claims 3 to 8, characterized in that at least one of the at least one brush tufts (11), preferably the respective brush tuft (11), overlaps at least in sections with the main suction mouth (15) during rotation about the axis of rotation (8). Vacuum cleaner according to one of Claims 1 to 9, characterized in that the vacuum cleaner (1) has a housing (12) with an outermost outside (22) transverse to the axis of rotation (8); that at least one of the at least one brush tufts (11), preferably the respective brush tuft (11), protrudes from the outside (22) transversely to the rotation axis (8) during rotation about the rotation axis (8).

Images