EP4340689A1

EP4340689A1 - Floor nozzle apparatus and suction-cleaning device

Info

Publication number: EP4340689A1
Application number: EP21728496.7A
Authority: EP
Inventors: Markus SPROLL; Dominik Scholl; Tobias GELTZ; David Thomas
Original assignee: Alfred Kaercher SE and Co KG
Current assignee: Alfred Kaercher SE and Co KG
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2024-03-27
Also published as: CN117320607A; US20240081589A1; WO2022242851A1

Abstract

The invention relates to a floor nozzle apparatus, comprising: a receiving chamber (44) having a receiving space (46), which is open at a floor side (56); at least one cleaning roller (48), which is situated in the receiving space (46) and can be rotated about a rotational axis (50); and a suction connection (80), to which a suction flow is applied during operation of the floor nozzle apparatus; wherein a funnel-shaped duct device (92) is situated between the receiving space (46) and the suction connection (80), which duct device opens by means of an opening (94) into the receiving space (46) and is connected to the suction connection (80) or comprises the suction connection (80); and wherein the opening (94) has a width (b₁) in a width direction (24) in parallel with the rotational axis (50), together with at least one of the following: - the width (b₁) of the opening (94) is at least 50% of a width (b2) of the receiving space in the width direction (24); - the width (b1) of the opening (94) is at least three times a width (b₃) of an opening (84) of the suction connection (80) in the width direction (24).

Description

Floor nozzle device and suction cleaning device

The invention relates to a floor nozzle device, comprising a receiving chamber with a receiving space which is open on one side of the floor, at least one cleaning roller which is arranged in the receiving space and can be rotated about an axis of rotation, and a suction connection which, during operation of the floor nozzle device, is supplied with a suction stream is charged.

The invention also relates to a vacuum cleaning device.

Suction nozzles are known, for example, from US Pat. No. 4,315,344, US Pat US 2009/0320234 A or US 2012/066858 A is known.

US 2013/0111693 A and US 2015/0257621 A each disclose an extractor cleaning machine.

Furthermore, suction nozzles are known from US 2016/0302634 A, DE 10 2020 141 514 A1, DE 10 2015 105 415 A1, WO 2016/173859 A3 or DE 10 2015 108 157 A1.

WO 2016/202610 A1 discloses a suction nozzle for a vacuum cleaner.

The object of the invention is to provide a floor nozzle device of the type mentioned at the outset, in which suction at the receiving space is optimized.

In the case of the floor nozzle device mentioned at the outset, this object is achieved according to the invention in that a funnel-shaped channel device is arranged between the receiving space and the suction connection which opens into the receiving space with an orifice and which is connected to the suction connection or comprises the suction connection, and that the orifice has a width in a width direction parallel to the axis of rotation with at least one of the following: the width of the orifice is at least 30 % of a width of the accommodation space in the width direction; the width of the mouth is at least twice and in particular at least three times a width of an opening of the suction port in the width direction.

The channel means provides a flow-guiding transition from the suction port to the mouth. The mouth is wide in the width direction compared to the suction port.

The channel device according to the invention makes it possible for the receiving space to have a homogeneous flow profile over a large width of the receiving space in the width direction and in particular over the entire width. This allows an optimized extraction result to be achieved.

Furthermore, a relatively low flow resistance can be achieved via the channel device.

This allows an optimized cleaning result to be achieved with the cleaning roller. Picked up dirt can be optimally removed.

In particular, it is provided that the width of the mouth extends over at least 50% of the width of the receiving space and in particular over at least 70% of the width of the receiving space and preferably over at least 80% and preferably over at least 90% of the width of the receiving space in the width direction extends. In this way, dirt can be optimally vacuumed off. In particular, the configuration of the channel device is funnel-shaped only in the width direction. It is intended that a maximum height of the orifice in a height direction transverse to the width direction is smaller than a height of the opening of the suction port in the height direction, and in particular the height of the opening is at least twice the maximum height of the orifice. In particular, it can be achieved that a cross-sectional area of the channel device remains the same or decreases continuously from the mouth to the suction connection, with a homogeneous flow profile being able to be achieved for the suction at the receiving space.

In particular, the mouth is slit-shaped with a width in the width direction which is at least three times larger, and in particular at least five times larger and in particular at least ten times larger than a maximum height of the mouth in a height direction transverse to the pulp direction. As a result, an optimized flow profile can be achieved in the receiving space (which is a suction channel). The result is an optimized suction and thus an optimized cleaning result.

Conveniently, the opening of the suction port has a round or oval shape. This results in a simple structural design. To a certain extent, the channel device conveys the transition from the round or oval opening to a particularly slit-shaped opening.

It is particularly advantageous if a cross-sectional width of the duct device, which lies between lateral duct walls in the width direction, remains the same or decreases from the mouth to the opening of the suction connection. The cross-sectional width is the distance between the lateral channel walls in the width direction. An optimized flow profile can be achieved with the appropriate design.

Furthermore, it is favorable when a cross-sectional height of the duct device, which is between an upper duct wall and a lower duct wall in a height direction transverse to the width direction, increasing from the mouth toward the opening of the suction port, with the lower channel wall facing the bottom side and the upper channel wall facing the lower channel wall. This results in an optimized flow result.

In particular, a decrease in the cross-sectional width of the channel device from the mouth to the opening of the suction port is so correlated with an increase in the cross-sectional height of the channel device from the mouth to the suction port that a cross-sectional area of the channel device decreases continuously from the mouth to the suction port.

There is an optimized removal of dirt when the distance between the channel device and the bottom side increases, starting from the mouth towards the suction connection. In particular, this makes it possible to avoid horizontal surfaces on which dirt can accumulate.

In a favorable embodiment, the mouth is spaced from the underside of a body of the floor nozzle device on which the receiving chamber is arranged. This enables optimized dirt removal to be achieved. Dirt can also be thrown from the cleaning roller into the channel device via the mouth in order to ensure optimized dirt removal.

It is particularly advantageous if the channel device has at least one coarse dirt removal device, which leads into the receiving space. In principle, it is favorable if the mouth is designed in the form of a slit with a height which is much smaller than a width. This makes it possible to achieve a homogeneous flow profile in the receiving space. This can fundamentally make it more difficult to pick up coarse dirt. If at least one coarse dirt removal device is also present, coarse dirt can in turn be removed effectively. In particular, at least one of the following is then provided: a height of the channel device on the at least one coarse dirt removal device in a height direction transverse to the width direction is greater than a height of the channel device outside the at least one coarse dirt removal device; a height of the mouth at the at least one coarse dirt removal device is in the range between 5 mm and 30 mm; the at least one coarse dirt removal device is arranged relative to the width direction between a lateral outer end of the channel device and a central plane, which is oriented perpendicularly to the width direction, and in particular at a distance from the lateral outer end and in particular at a distance from the central plane; at least two and in particular exactly two coarse dirt removal devices are provided;

Coarse dirt removal devices are arranged symmetrically to a central plane which is perpendicular to the width direction.

By increasing the height of the channel device on a coarse dirt removal device, larger particles that cannot get into the channel device at the mouth outside of the coarse dirt removal device can be removed. In particular, the height of the mouth on a coarse dirt removal device is between 10 mm and 30 mm.

It is favorable for coarse dirt removal if the at least one coarse dirt removal device is arranged at a distance both in relation to a central plane and in relation to a lateral outer end. It is particularly advantageous if two, and in particular exactly two, coarse dirt removal devices are provided. On the one hand, this allows optimal removal of coarse dirt. Furthermore, the channel device at the mouth can be formed with a relatively high degree of symmetry in order to achieve a homogeneous flow profile in the receiving space even when removing coarse dirt.

It is then particularly advantageous if coarse dirt removal devices are arranged symmetrically to a center plane which is perpendicular to the width direction.

In a structurally simple embodiment, at least one recess is formed on a wall of the channel device to form the at least one coarse dirt removal device. As a result, a cross-sectional enlargement can be achieved “locally” in the area of the recess. A homogeneous flow profile can be obtained.

It is favorable when at least one of the following is provided: the at least one recess is formed on an upper side of the wall of the channel device, which faces away from the bottom side; the at least one recess forms a channel-shaped cross-sectional area enlargement area towards an interior of the channel device; the at least one channel device has a rounded wall profile at the at least one recess.

A coarse dirt removal device can then be implemented in a structurally simple manner, with the area of the coarse dirt discharge device, the channel device locally has an enlarged cross-section. A homogenized flow profile is not significantly disturbed by this.

In a structurally simple embodiment, the mouth has an underside, which faces the bottom side, and has an upper side opposite the underside, with at least one of the following: the underside has a substantially rectilinear course; the upper side has a course deviating from the straight line with steps and/or bulges; a clearance between the bottom and the top is in the range of 2 mm to 30 mm; a distance between the underside and the upper side is between 2 mm and 15 mm outside of a coarse dirt removal device that may be present.

This results in a simple way in a homogenized flow profile during suction in the receiving space. The channel device can be formed in a structurally simple manner.

It is favorable if the height of the mouth is between 2 mm and 30 mm in a height direction transverse to the width direction and outside a coarse dirt removal device, if one is present, is in the range between 2 mm and 15 mm. In particular, the height of the mouth in the height direction is in the range between 2 mm and 15 mm if a coarse dirt removal device that may be present is not taken into account. In this way, a homogenized flow profile for the receiving space can be achieved in a structurally simple manner. In an advantageous embodiment, the duct device has a first area at the mouth in relation to the width direction, which is delimited by a lateral outer duct wall, and has a second area which adjoins the first area, the first area being of a smaller height than the second region, in particular, a width of the accommodation space in the width direction is at least 400 mm. It has been shown that the homogenization of the flow profile over the entire width of the receiving space can then be improved. In particular, it has been found that the flow profile can be homogenized with broad floor nozzle devices (with a width of at least 400 mm).

In particular, it is advantageous if the height of the first area is in the range between 2 mm and 8 mm.

It has also proven to be favorable when the height of the second area is in the range between 5 mm and 30 mm and outside a coarse dirt removal device, if one is present, is in the range between 5 mm and 15 mm. A homogenized flow profile then results in the receiving space.

It can be advantageous if at least one flow area is arranged or formed in the channel device. This allows the flow conditions to be specifically influenced. In particular, it can then be achieved that flow resistance is minimized and a homogenized flow profile is achieved in the receiving space.

In particular, at least one of the following is provided: the at least one flow area is formed by a recess on the channel device; the at least one flow area is spaced apart from the mouth; the at least one flow area is spaced apart from the suction port; the at least one flow area lies on a central plane; the at least one flow area is arranged and/or formed symmetrically or asymmetrically to a central plane of the channel device, the central plane being oriented perpendicularly to the width direction; the at least one flow-around area has a geometric center and an extension of the at least one flow-around area away from the center perpendicular to the width direction, this extension being greater than a width of the at least one flow-around area parallel to the width direction at the geometric center; a cross-sectional area of the at least one flow area, which forms a blocking area for a flow, is at most 90% of a total cross section of the channel device including the at least one flow area; the at least one flow area is edge-free or provided with edges; the at least one flow area has an egg shape or drop shape.

If the at least one flow-around area is formed by a recess on the channel device, it can be produced in a simple manner. The recess can be used to position elements of the floor nozzle device. For example, the recess can be used to provide a fastening point for a soleplate on the floor nozzle device.

Optimized flow conditions result when the at least one flow area is at a distance from the mouth and at a distance from the suction connection.

For example, at least one flow area is located on a central plane.

The at least one flow area can be arranged and/or formed symmetrically or asymmetrically to the central plane, depending on the design of the channel device and application.

In one embodiment, the flow area is egg-shaped or drop-shaped, having an extent perpendicular to the width direction, which, starting from a geometric center point, is greater than the extent in the width direction at this geometric center point.

It has been shown that an optimized flow profile results when a cross-sectional area of the at least one flow area, which forms a blocking area for the flow, is at most 90% of a total cross-section including this blocking area.

Furthermore, it has proven to be favorable if a flow resistance coefficient for the at least one flow area, i.e. the Cw value, is less than or equal to 3, based on a Reynolds number of 2300.

It is favorable if the channel device is arranged above a sliding sole relative to the bottom side. For example, a recess use the channel device to form a flow area for attaching the soleplate.

In one embodiment, it is provided that a drive motor for the at least one cleaning roller is arranged on a body of the floor nozzle device and that the drive motor is positioned between the suction connection and the mouth of the channel device, with the channel device in particular being related to a central plane which perpendicular to the width direction is formed asymmetrically to provide space for the drive motor to. The channel device then has such an external shape that an optimized use of space on the floor nozzle device is achieved.

The at least one cleaning roller is, for example, a brush roller or a textile roller. In one carpet cleaning application, the cleaning roller is a brush roller. However, it is also possible, for example, for the cleaning roller to be a textile roller which has a textile covering and is used in a wet floor vacuum cleaning device.

In particular, in a cleaning operation of the floor nozzle device, the suction connection is subjected to a suction flow and the at least one cleaning roller rotates. This allows an optimized cleaning result to be achieved.

Provision can be made for the channel device to be designed in one piece.

It can then be produced in a simple manner and positioned on a corresponding body of the floor nozzle device during production of the floor nozzle device.

In particular, it is provided that a cross-sectional area of the channel device increases continuously, starting from the mouth towards the suction connection. According to the invention, a suction cleaning device is provided which comprises a suction fan device and a floor nozzle device according to the invention, the suction fan device being in fluid communication with the suction connection of the floor nozzle device.

In one embodiment, the vacuum cleaning device is designed as a carpet brush vacuum cleaning device. The cleaning roller is then in particular a brush roller.

The vacuum cleaning device is designed, for example, as an upright device that can be operated by a standing operator. In particular, the floor nozzle device is then arranged detachably on a device body. It is also possible for the vacuum cleaning device to be designed as a self-propelled and self-steering cleaning device (as a cleaning robot).

The following description of preferred embodiments serves to explain the invention in more detail in conjunction with the drawings. Show it:

FIG. 1 shows a partial side view of a first exemplary embodiment of a vacuum cleaning device according to the invention with an exemplary embodiment of a floor nozzle device according to the invention;

FIG. 2 shows a bottom view of the floor nozzle device according to FIG. 1 in direction A;

Figure 3 is the same view as Figure 2 with a soleplate removed;

Figure 4 is a sectional view taken along line 4-4 of Figure 2; FIG. 5 shows an enlarged representation of the region B according to FIG

3;

FIG. 6 shows a partial view of the floor nozzle device according to FIG. 1 in the direction C, with components having been removed;

FIG. 7 shows an exemplary embodiment of a channel device in a plan view;

FIG. 8 shows another view of the channel arrangement according to FIG. 7;

FIG. 9 shows a side view of the channel device according to FIG. 7;

FIG. 10 shows a further exemplary embodiment of a channel device;

FIG. 11 shows a second exemplary embodiment of a vacuum cleaning device according to the invention in the form of a self-propelled and self-steering cleaning device (cleaning robot);

FIG. 12 shows a side view of the suction cleaning device according to FIG. 11;

FIGS. 13 to 18 show a schematic plan view of exemplary embodiments of a duct device similar to that in FIG. 10 with different examples of flow areas.

A first exemplary embodiment of a vacuum cleaning device, which is shown in FIG. 1 in a partial side view, is a carpet brush cleaning device. The vacuum cleaning device 10 comprises a floor nozzle device 12. A device body 14 is arranged on the floor nozzle device 12 in particular in a pivotable manner. The suction cleaning device 10 is designed as an upright device which can be used by a standing operator. For this purpose, a corresponding grip device or guide device is arranged on the device body 14 (not shown in FIG. 1).

A suction fan device 16 is seated on the device body. During cleaning operation of the suction cleaning device 10, the suction fan device 16 generates a suction stream, with which the floor nozzle device 12 is acted upon.

The vacuum cleaning device 10 is placed on a floor 18 to be cleaned via the floor nozzle device 12 .

The floor nozzle device 12 is connected to the device body 14 in a detachable or non-detachable manner.

An exemplary embodiment of a floor nozzle device 12 (FIGS. 1 to 6) comprises a body 20. The body 20 has a front face 22. FIG. It extends in a width direction 24 between a first transverse side 26 and an opposite second transverse side 28. The front end face 22 lies between the first transverse side 26 and the second transverse side 28.

A wheel device 30 is arranged on the body 20 opposite the front end face 22 and has a first wheel 32 and a second wheel 34 spaced apart in the width direction 24 .

In one exemplary embodiment, the body 20 has a smaller width in the area of the wheel device 30 than on the front face 22.

The floor nozzle device 12 can be supported on the floor 18 via the wheel device 30 and thus the vacuum cleaning device 10 can also be supported. In the area of the front face 22, another wheel device 36 is arranged. This comprises a first wheel 38 and a second wheel 40 spaced apart from the first wheel 38 in the width direction 24.

In one embodiment, the first wheel 32 and the second wheel 34 have the same diameter. The first wheel 38 and the second wheel 40 also have an equal diameter, with the diameter of the wheel 38 and the second wheel 40 being smaller than the diameter of the wheels 32, 34 of the wheel assembly 30.

In one embodiment, the first wheel 32 and the first wheel 38 and the second wheel 34 and the second wheel 40 are each aligned in a direction 42 that is perpendicular to the widthwise direction 24 .

In a cleaning operation of the vacuum cleaning device 10, the floor nozzle device 12 and thus the vacuum cleaning device 10 are supported on the floor 18 to be cleaned via the wheel device 30 and the further wheel device 36.

A receiving chamber 44 is arranged on the body 20 . The receiving chamber is positioned between the wheel assembly 30 and the other wheel assembly 36 . It is closer to the front end face 22 than to the wheel device 30 or is closer to the further wheel device 36 than to the wheel device 30.

The receiving chamber 44 includes a receiving space 46. A cleaning roller 48 is positioned on the receiving chamber 44 and is rotatably mounted in the receiving space 46 about an axis of rotation 50. The width direction 24 is parallel to the axis of rotation 50.

In the exemplary embodiment shown according to FIGS. 1 to 6, a single cleaning roller 48 or a one-piece cleaning roller 48 is provided. In principle, it is also possible for a plurality of cleaning rollers (in particular with a common axis of rotation 50) or a multi-part cleaning roller (with the same axis of rotation 50) to be present.

In the embodiment shown, the cleaning roller 48 is a brush roller with a set of bristles 52. A carpet cleaning device is thereby realized as a vacuum cleaning device 10.

In principle, it is also possible that in other applications, for example in a cleaning device with a wiping function, the cleaning roller has a textile trimming, for example. In principle, it is also possible for the cleaning roller 48 to have both a bristle trimming 52 and a textile trimming.

The body 20 of the floor nozzle device 12 has an underside 54. This underside 54 is a bottom side 56 which faces the floor 18 when the floor nozzle device 12 is properly positioned over the wheel devices 30, 36 on the floor 18.

The receiving space 46 is open to the bottom side 56, so that the cleaning roller 48 can act on the floor 18 in this area; the receiving chamber 44 has an opening 58 on the bottom side 56.

The opening 58 is in particular contiguous and continuous, so that a correspondingly large area of action of the cleaning roller 48 on the floor 18 to be cleaned is provided.

The cleaning roller 48 is rotatably mounted on the receiving chamber 44 and thereby on the body 20 via a rotary bearing 60 about the axis of rotation 50 . The rotary bearing 60 has a first bearing part 62a and a second bearing part 62b, which are spaced apart in the width direction 24 and, in particular, laterally delimit the receiving space 46 with respect to the width direction 24; the first bearing part 62a is assigned to the first transverse side 26 and the second bearing part 62b is assigned to the second transverse side 28 .

In an embodiment shown in Figures 2 to 6, a width of the cleaning roller 48 in the width direction 24 is smaller than a width of the body 20 in this direction.

In one embodiment, a drive motor 64 (see Figure 6) is mounted on body 20 . This drive motor 64 is in particular an electric motor. It is provided ver on the device body 14 with electrical energy. For example, a battery device is arranged on the device body 14 (and in particular a rechargeable battery device is arranged), which provides the drive motor 64 with electrical energy. Alternatively or additionally, it is also possible for the device body 14 to have a mains connection and for electrical energy to be provided to the drive motor 64 via a corresponding supply device on the device body 14 .

In one embodiment, drive motor 64 is located on body 20 between wheel assembly 30 and receiving chamber 44 (see Figure 6), specifically being located closer to wheel assembly 30 than to receiving chamber 44.

A center plane 66 is assigned to the floor nozzle device 12 . The central plane 66 is located in the middle between the first transverse side 26 and the second transverse side 28. It is oriented perpendicular to the width direction 24 and thus perpendicular to the axis of rotation 50.

The body 20 is geometrically divided into a first half part 68 and a second half part 70 by the central plane 66 , the first transverse side 26 lying on the first half part 68 and the second transverse side 28 lying on the second half part 70 . In one embodiment, the drive motor 64 is in one half.

In the embodiment shown, the drive motor 64 is located in the first half part 68 (compare FIG. 6).

It is located in particular on the body 20 in front of the first wheel 32.

In particular, the drive motor 64 lies on a line that is perpendicular to the width direction 24 (in the direction 42) between the first wheel 32 and the first wheel 38 .

A torque transmission device 72 is provided for torque transmission from the drive motor 64 to the cleaning roller 48 in order to effect its rotational movement about the axis of rotation 50 . The torque transmission device 72 bridges a distance between the drive motor 64 and the cleaning roller 48, in particular in the direction 42.

The torque transmission device 28 is arranged on the same half part as the drive motor 64. In the exemplary embodiment shown, it is arranged on the first half part 68 and is arranged adjacent to the first transverse side 26.

The torque transmission device 72 is or includes a belt drive, for example.

In particular, it is provided that the torque transmission device 72 also includes a speed reducer, so that the speed of the cleaning roller 48 is lower than the speed of the drive motor 64.

A width of the cleaning roller 48 in the width direction 24 is substantially smaller than a width of the body 20 in the width direction 24 by the amount which is the sum of a width of housing walls, a width of the first bearing part 62a and a width of the second bearing part 62b and a width of torque transmission device 72 in width direction 24 in each case.

In principle, it is also possible for the drive motor 64 to be integrated into the cleaning roller 48 (“roller motor”).

It is also fundamentally possible for the drive motor to be integrated into the device body 14 , for example, or to be arranged between the device body 14 and the body 20 .

In the exemplary embodiment described, the cleaning roller 48 is driven in rotation via one side, namely via the side which faces the first bearing part 62a or which faces the first transverse side 26 .

In principle, it is also possible, for example, for the drive motor 64 to be arranged in such a way that the cleaning roller 48 is driven centrally.

On the underside 24 of the body 20 a soleplate 74 is arranged. The soleplate 74 is positioned between the receiving chamber 44 and the wheel assembly 30 .

In one exemplary embodiment, the sliding sole 74 comprises a first area 76 and a second area 78. The second area 78 is the actual sliding sole area and is fixed to the first area 76 and, in particular, formed in one piece with it.

The second area 78 corresponds to the additional wheel device 36. The second area 78, which extends in particular in the width direction over the entire width of the floor nozzle device 12, lies on a plane 80 with the wheel device 30 and the additional wheel device 36. Correspondingly, FIG a cleaning operation of the suction cleaning device 10 this via the floor nozzle device 12 via the soleplate 74 with the second Area 78, the wheel device and the further wheel device 36 are supported on the floor 18.

FIG. 3 shows the floor nozzle device 12 according to FIG. 2 with the soleplate removed.

The floor nozzle device 12 has a suction connection 80 (see, for example, FIG. 2), via which a suction flow of the suction fan device 16 can be coupled into the floor nozzle device 12 .

In the exemplary embodiment shown, a suction hose 82 is coupled to the suction connection 80 . The suction hose 82 leads from the suction connection 80 to the device body 14 and provides a fluidic connection to the suction fan device 16 for the application of suction flow to the suction connection 80 .

The suction port 80 includes an opening 84 through which a suction flow can flow accordingly. In particular, the opening 84 has a round or oval cross-sectional shape.

In one embodiment, the opening 84 of the suction port 80 is oriented transverse and, for example, perpendicular to the underside 54 and bottom side 56 of the body 20, respectively.

In particular, a mouth normal 86 of the opening 84 is oriented parallel to the direction 42 or perpendicular to the axis of rotation 50 or perpendicular to the width direction 24 .

In the exemplary embodiment shown and described, the suction hose 82 in particular can be detached from the suction connection. A suction connection is generally understood here as a coupling connection for a suction flow into the floor nozzle device 12 . It does not necessarily have to be a connection or flange to which a hose or pipe can be connected, for example. The suction connection 12 can also be formed in one piece on a corresponding suction pipe or suction hose.

In the exemplary embodiment shown, the suction connection 80 is formed on a pipe socket 88 to which the suction hose 82 is connected in particular in a detachable manner.

In one embodiment, the suction connection 80 faces away from the front face 22 and is located in particular on a rear side 90 of the body 20 between the first wheel 32 and the second wheel 34. This provides the appropriate space for a suction hose 82 in the intermediate space between the first wheel 32 and the second wheel 34 to the device body 14.

A channel means 92 is provided which is positioned on the body 20 and provides fluid communication between the suction port 80 (and the receiving space 46 (between the opening 84 and the receiving space 46)) such that debris passes through the channel means 92 can be sucked off; through the channel device 92, the receiving space 46 is subjected to the prod by the suction fan device 16 th suction flow.

The channel device 92 is designed in such a way that there is low flow resistance and a flow profile that is as homogeneous as possible when it is sucked into the receiving space 46 .

The receiving space 46 forms a suction channel which extends in the width direction Rich 24 and in which the cleaning roller 48 is positioned. This suction channel/receiving space 46 is in operation of the floor nozzle device 12 correspondingly subjected to a suction flow via the suction flow, which is coupled in via the channel device 92 .

The channel device 92 is also preferably arranged and designed in such a way that during operation of the floor nozzle device 12 with a rotating cleaning roller 48 , dirt carried along by the cleaning roller 48 can to a certain extent be thrown into the channel device 92 .

The channel device 92 opens into the receiving space 46 (the suction channel) with a mouth 94 (compare FIG. 4).

The mouth 94 is located in a height direction 96 in particular, which is perpendicular to the width direction 24/the axis of rotation 50 and perpendicular to the bottom side 56, above the sliding soleplate 74 and in particular directly above the second region 78 of the sliding soleplate 74.

The mouth 94 is spaced from the underside 54 or bottom side 56 of the body 20.

A direction of rotation 98 of the cleaning roller 48 for the rotation about the axis of rotation 50 is such that a region which rests on the floor 18 rotates the shortest way towards the mouth 94 . In the view shown in Figure 4, the direction of rotation 98 is counterclockwise. For an operator who is behind the device body 14 for proper operation of the suction cleaning device 10, the direction of rotation 98 is counterclockwise.

A guide element 100 is arranged on the receiving chamber 44 in the area of the underside 54 (see FIG. 4), which is oriented in the manner of an inclined plane to the bottom side 56 and which is aligned with the mouth 94 of the channel device 92 . The guide element 100 limits the Opening 58 of the receiving space 46 to the bottom side 56. It serves to support the coupling of dirt into the channel device 92 at its mouth 94.

The mouth 94 of the channel device 92 in the receiving space 46 has a mouth normal 102 which is perpendicular to the width direction 24 (perpendicular to the axis of rotation 50).

Furthermore, the orifice normal 102 is parallel to the bottom side 56 or paral lel to the bottom 18 if the bottom is flat and the bottom nozzle device 12 is set up properly on the bottom 18 .

The mouth 94 is slot-shaped and extends in the width direction 24.

The mouth 24 has a bottom 104 and a top 106 (see Figure 4). The underside 104 faces the bottom side 56 .

The mouth 94 has a width bi. The receiving space 46 has a width b2 in the width direction 24 . The width bi is at least 30%, preferably at least 50%, preferably at least 70%, preferably at least 80% and preferably at least 90% of the width b2. The suction channel (of the receiving space 46) is sucked off over the largest part of the receiving space 46.

The channel device 92 is funnel-shaped starting from the mouth 94 in the width direction 24 Rich. Its width b* in the width direction 24 between lateral channel walls 108a, 108b (compare FIG. 3) decreases continuously from the mouth 94 (with b*=bi) to the suction connection 82 (with b*=b3; see below). In particular, the width bi of the orifice 94 is at least twice and preferably three times the width b3 of the opening 84 on the suction connection 80. The width bi is preferably at least four times and in particular at least five times the width b3.

In a preferred embodiment, the channel means 92 is funnel-shaped in the width direction 24 only.

With respect to the vertical direction 96, a cross-sectional height h between a lower channel wall 110a and an upper channel wall 110b increases continuously from the mouth 94 to the opening 84.

The duct device 92 comprises the lower duct wall 110a and the upper duct wall 110b as the duct wall, between which the lateral duct walls 108a, 108b lie. Formed between these channel walls 108a, 108b, 110a, 110b is an interior space 112 of the channel device 92 through which the suction flow can flow.

Furthermore, the channel device 92 is arranged obliquely on the body 20 in such a way that the lower channel wall 110a, at least at the transition to the mouth 94, has no horizontal area on which dirt could possibly deposit.

In particular, the channel device 92 is arranged on the body 20 such that a distance from the channel device 92 in the height direction 96 to the bottom side 56 (to the underside 54) increases, starting from the mouth 94 towards the opening 84 (see FIG. 4).

The mouth 94 has a height H between the bottom 104 and the top 106, the height H being measured in the height direction 96.

Due to the slit-like design of the mouth 94, the width bi in the width direction 24 is at least twice and in particular at least three times greater and in particular at least five times greater and in particular at least ten times greater than the (maximum) height H of the mouth 94.

The height H is in particular in the range between 5 mm and 15 mm or in the range between 2 mm and 15 mm if any coarse dirt removal devices (see below) are not taken into account.

It has been shown that this design of the channel device 92, which is funnel-shaped at the transition from the mouth 94 to the opening 84 in the width direction 24, and at the transition from the mouth 94 to the opening 84 in the height direction 96 for a continuous Provides cross-sectional height increase, a reduced flow resistance can be achieved and a homogenized flow profile can be achieved over the entire width of the receiving space 46 (the suction channel). This in turn results in optimized dirt removal.

In particular, the channel device 92 is designed in such a way that a cross-sectional area of the channel device 92 is continuously reduced from the mouth 94 to the opening 84

In one embodiment, channel means 92 is integrally formed and fixed to body 20, for example.

Provision is made for a flow area 114 to be arranged on the channel device 92 .

The flow area 114 is used to adjust the flow ratios. The flow area 114 is an area which blocks the flow passage in the inner space 112 of the channel device 92 and must be flowed around accordingly. The flow area 114 is formed in particular via a recess 116 on the channel device 92, this recess being delimited by a wall 118 running around it.

A passage through the channel means 92 is provided by the recess 116 (compare Figure 5). A fastening point 122 for the sliding sole 74 on the body 20 is provided via this passage 120 .

In the exemplary embodiment shown, the flow area 114 has a heart shape. It lies on the median plane 66 and has a pointed edge 124 which faces the mouth 94 .

In the embodiment shown, the flow area 114 is not symmetrical to the center plane 66.

The ductwork 92 as a whole is not symmetrical about the center plane 66 (see Figure 3). It is reduced in the area of the first half part 68 in comparison to the area of the first half part 70 in order to provide a corresponding space 126 (compare FIG. 3) for the positioning of the drive motor 64 .

The flow area 114 is designed in such a way that, based on a Reynolds number of 2300, it has a flow resistance coefficient _cw which is less than or equal to 3.

An embodiment of a channel means 92' is shown in Figures 7-9. This channel device 92' is a variant of the channel device 92 according to Figures 2 to 6.

The channel device 92' is designed in one piece and in particular is designed in one piece. This results in simple assembly and fastening in the manufacture of the floor nozzle device 12. However, it is also possible for the corresponding channel device 92 or 92' to be designed in several parts and for example to be assembled using two half-shells.

The channel device 92' can be arranged on the floor nozzle device 12 instead of the channel device 92.

The channel means 92 'has a lower channel wall 128 and an opposite upper channel wall 130 on. It is delimited by lateral channel walls 132a, 132b. The channel device 92' comprises an orifice 134 and a suction connection 136. In this context, it is basically designed in the same way as the channel device 92 described above.

The suction connection 136 is formed on a pipe socket 138, for example.

The channel device 92' comprises a drop-shaped flow area 140, which is formed by a recess.

The duct 92' has a median plane 142 transverse to a width direction 24 (the same reference numeral is used here as for the duct 92).

The channel device 92' is embodied symmetrically to the center plane 142 and the flow area 140 lies on the center plane 142 and is arranged and designed symmetrically thereto.

The channel device 92 ′ has a first coarse dirt removal device 144 and a second coarse dirt removal device 146 . These are arranged symmetrically to the center plane 142 . The opening 134 has an increased height in a height direction 96 perpendicular to the width direction 24 at the first coarse dirt removal device 144 and the second coarse dirt removal device 146 .

This means that coarse dirt can be picked up and removed better.

In one embodiment, the first coarse dirt removal device 144 and the second coarse dirt removal device 146 are formed by corresponding recesses 148 on the upper channel wall 130 . The recesses 148 are formed by rounded wall areas 150 projecting outwards. As a result, in the area of the coarse dirt removal devices 144, 146, channel-shaped cross-sectional area enlargement areas 152 are formed.

The coarse dirt removal devices 144, 146 are designed as discrete areas on the channel device 92', with a cross-sectional area enlargement being achieved locally for coarse dirt removal, which leads to the mouth 134. In this way, a homogeneous flow profile is achieved over the entire suction channel width (an entire width of the receiving space 46), with larger particles being discharged via the coarse dirt removal device 144, 146.

A height 154 of the mouth 134 at a coarse dirt removal device 144 or 146 is in the range between 5 mm and 30 mm.

A height 156 of the mouth 134 outside a coarse dirt removal device 144, 146 and in particular next to such a device is in the range between 5 mm and 15 mm, with the coarse dirt removal device 144, 146 being provided, the height 154 being greater than the height 156.

In a variant of an embodiment, the channel device 92 ′ has a first area 158 and a second area 160 which adjoins the first area 158 towards the center plane 142 . The first area 158 is a peripheral area which is laterally bounded by the respective lateral channel walls 132a, 132b.

A height 162 of the mouth 134 and also of the channel device 92' in the first area 158 is smaller than in the second area 160.

In particular, the height 162 in the first region 158 ranges between 2 mm and 8 mm. The height 156 in the second region 160 is in the range between 5 mm and 15 mm, with the height 156 being greater than the height 162.

There is a gradual transition from the first region 158 to the second region 160 to provide the appropriate increase in height.

The provision of the first area 158 and the second area 160 makes it possible to achieve better homogenization of the flow profile, in particular with widths b2 of the receiving space 46 from approximately 400 mm.

In particular, when the width b2 is less than 400 mm, for example 300 mm, then no step corresponding to the first portion 158 and the second portion 160 is provided.

In the representation of FIG. 8, this means that the second region 160 extends up to the respective lateral channel walls 132a and 132b.

In the case of the channel device 92 ′, steps or recesses 148 are formed on the upper channel wall 130 and thereby exclusively on the upper channel wall 130 . The orifice 134 has an underside 164 which abuts the lower duct wall 128 . It has an opposite top surface 166 which abuts the upper channel wall 130 .

In the embodiment shown, the underside 164 has a rectilinear course. Recesses 148 and steps for the transition from the first area 158 to the second area 160 are located on the upper side 166. This results in a simplified ability to position and also to manufacture the channel device 92'.

As indicated schematically in FIG. 10, in the case of a channel device 168, a plurality of flow areas can also be provided. A mouth 170 and a suction port 172 with a corresponding opening are provided. One or more flow areas 174 lie between the suction port 172 and the mouth 170; they are spaced from the mouth 170 and are spaced from the suction port 172.

A flow area 174 can be formed symmetrically or asymmetrically to a central plane 176, which is perpendicular to a width direction 24, and/or can be arranged symmetrically or asymmetrically.

In one embodiment, a central flow area 174 is provided, which has a geometric center 178 .

In the exemplary embodiment shown according to FIG. 10, this geometric center point 178 lies on the center plane 176. However, it can also be at a distance from this center plane 176.

An extension di of the flow area 174 away from the center point 178 towards the suction connection 172, which is denoted by di in Figure 10, is greater than a width d2 of the flow area 174 in the width direction 24 at the geometric center point 178.

As a result, the flow area 174 has a (hollow) egg shape.

In the exemplary embodiment shown, the flow area in an interior of the channel device 168 has no edge, but is rounded off. The flow area 174 forms a blocking surface for a flow. It is provided in particular that this blocking area A2 (compare FIG. 10) forms at most 90% of a total cross-sectional area of the channel device 168, the total cross-sectional area being Ai+A2+A3 according to FIG.

The areas Ai and A ₃ are the areas which are left free to a certain extent by the flow area 174 and through which flow to the suction connection 172 is possible.

It was then shown that there is an effective reduction in flow resistance and that a homogenized flow profile in the receiving space 46 can be achieved.

Different examples of flow areas 200 which are provided with edges are shown in FIGS.

In FIG. 13, the corresponding flow area 200 is triangular. It lies on a corresponding median plane 202 and is symmetrical to it.

The flow area 200 has corners or edges at corresponding triangle points.

These corners or edges can be sharp or rounded off.

A variant of the design according to FIG. 13 is shown in FIG. A portion of it can be on the center plane 202 or it can be completely next to the center plane 202 .

FIG. 15 shows a further exemplary embodiment of a flow area which lies on a central plane 202 and is symmetrical to this. This flow area has corners or edges on the center plane 202 . Outside of the center plane 202, the flow area is edge-free. FIG. 16 shows a variant of the embodiment according to FIG. It can also be oriented closer to the mouth, for example.

FIG. 17 shows a flow area which is rhombic and lies on a central plane 202 and is symmetrical to the central plane 202 . A variant is shown in FIG. 18 which, in comparison to the embodiment according to FIG. This flow area is diamond-shaped.

The flow area is selected so that the flow conditions are optimized for the relevant application (for example, taking into account the geometric dimensions of the floor nozzle device).

According to the invention, a channel device 92 , 92 ′, 168 is provided on a floor nozzle device 12 , which is in connection with the receiving space 46 (the suction channel) and the suction connection 80 . This is designed in such a way that with a low flow resistance, a homogenized flow profile results at the intake port. This results in effective suction.

A cross-sectional area decreases continuously from the mouth to the suction port.

The channel device 92, 92', 168 is funnel-shaped with respect to the width direction 24, resulting in a reduction in width towards the suction connection, starting from the mouth.

In particular, an opening into the receiving space 46 (into the suction channel) is designed in the form of a slot. Through the channel device 92, 92 ', 168 there is a transition to a round or oval suction port, which has a significant has a smaller width than the width of the mouth, and thereby has a greater height than the height of the mouth.

Coarse dirt removal devices 144, 146 can effectively remove coarse dirt (such as pebbles) even if the opening is slot-shaped.

By providing one or more flow areas, a targeted influencing of the flow can be achieved in order to obtain a homogeneous flow profile on the suction channel (the receiving space 46), particularly with low flow resistance.

The channel means 92, 92', 168 have been described above in connection with use in a vacuum cleaner configured as a carpet brush vacuum cleaner. In principle, they can also be used, for example, on floor nozzle devices for a wet/dry vacuum cleaner.

A further exemplary embodiment of a vacuum cleaning device according to the invention, which can be provided with a corresponding channel device, is a vacuum cleaning device 180 (FIGS. 11, 12), is a self-propelled and self-steering vacuum cleaning device (cleaning robot). In this suction cleaning device 180 according to the invention a floor nozzle device is integrated.

The corresponding floor nozzle device 182 includes a cleaning roller 183 which is positioned in a receiving space 186 of a receiving chamber 188 in a rotatable manner.

The cleaning roller 183 is positioned between opposite wheels 188 . A suction fan device 190 is provided, which generates a corresponding suction flow.

This is in particular guided through a suction material container 192 which is seated detachably on a body 194 .

In the receiving space 184 opens a channel device 196, which is designed in principle as described above.

A suction connection 198 is provided, which is connected, for example, to an interior of the suction material container 192 .

An opening is provided, with which the channel device 196 opens into the receiving space 184 and to the suction connection 198.

The mouth is slit-shaped and the suction port has an opening which is circular or oval. There is a continuous cross-sectional enlargement from the mouth to the suction port 198. As described above, the channel device 196 is funnel-shaped in a width direction with a width at the mouth which is considerably larger than a width of the opening of the suction port. A height of the mouth is significantly smaller than a height of the opening at the suction port.

The channel device 196 basically functions in the same way as described above with reference to the channel device 92, 92', 168 and basically corresponds in structure to the channel devices described above. List of reference symbols Vacuum cleaning device (first exemplary embodiment) Floor nozzle device Device body Suction fan device Floor Body Front end face Width direction First transverse side Second transverse side Wheel device First wheel Second wheel Further wheel device First wheel Second wheel Direction of receiving chamber Recording space Cleaning roller Rotation axis Bristle trimmings Underside Floor side Opening Pivot bearing a First bearing part b Second bearing part Drive motor center plane First half part Second half part Torque transmission device Sliding sole First area Second area Suction connection Suction hose Opening Orifice normal Pipe socket Clean side Channel device ' Channel device Orifice Height direction Rotation direction 0 Guide element 2 Orifice normal 4 Underside 6 Upper side 8a Lateral duct wall 8b Lateral duct wall 0a Lower duct wall 0b Upper duct wall 2 Interior 4 Flow area 6 Recess 8 Circumferential end wall 0 passage 2 attachment point 4 edge 6 space Lower duct wall Upper duct wall a Lateral duct wall b Lateral duct wall Outlet Suction connection Pipe socket Flow area center plane First coarse dirt removal device Second coarse dirt removal device Recess Wall area Cross-sectional area enlargement area Height Height First area Second area Height bottom side Channel device Outlet Suction connection Flow area center plane Geometric center of the vacuum cleaning device (second exemplary embodiment) Floor nozzle device Cleaning roller Receiving space Receiving chamber wheel 190 suction fan device

192 suction container

194 bodies

196 Channel Setup

198 suction port

200 flow area

202 median plane bi width of the mouth 94 b2 width of the receiving space 46 b3 width of the opening 84 b* width of the channel device

H height of mouth 94 h cross-sectional height of duct wall

Claims

patent claims

1. Floor nozzle device, comprising a receiving chamber (44; 186) with a receiving space (46; 184) which is open to a bottom side (56), at least one cleaning roller (48; 183) which is arranged in the receiving space (46; 184). and is rotatable about an axis of rotation (50), and a suction connection (80; 136; 172; 198), which is subjected to a suction flow during operation of the floor nozzle device, characterized in that between the receiving space (46; 187) and the suction connection (80; 136; 172; 198), a funnel-shaped channel device (92; 92';168; 196) is arranged, which opens with an orifice (94; 134; 170) into the receiving space (46; 184) and which is connected to the suction port (80; 136; 172; 198) or comprises the suction port (80; 136; 172; 198), and that the mouth (94; 134; 170) has a width (bi) in a width direction (24 ) parallel to the axis of rotation (50) with at least one of the following: the width (bi) of the mouth ( 94; 134; 170) is at least 30% of a width (b2) of the receiving space in the width direction (24); the width (bi) of the mouth (94; 134; 170) is at least twice a width (b3) of an opening (84) of the suction port (80; 136; 172; 198) in the width direction (24).

2. Floor nozzle device according to claim 1, characterized in that the width (bi) of the mouth (94; 134; 170) extends over at least 50% of the width (b2) of the receiving space (46; 184) and in particular over at least 70% of the width (b2) the receiving space (46; 184) and preferably over at least 80% and preferably over at least

90% of the width (b2) of the receiving space (46; 184) in the widthwise direction (24).

3. Floor nozzle device according to claim 1 or 2, characterized in that a maximum height (H) of the mouth (94; 134; 170) in a height direction (96) transverse to the width direction (24) is smaller than a height of the opening ( 84) of the suction connection (80; 136; 172; 198) in the height direction (96), and in particular that the height of the opening (84) is at least twice the maximum height (H) of the mouth (94; 134; 170).

4. Floor nozzle device according to one of the preceding claims, characterized in that the orifice (94; 134; 170) is slot-shaped with a width (bi) in the width direction (24) which is at least three times larger, and in particular at least five times larger and is in particular at least ten times greater than a maximum height (H) of the mouth (94; 134; 170) in a height direction (96) transverse to the width direction (24).

5. Floor nozzle device according to one of the preceding claims, characterized in that the opening (84) of the suction connection (80; 136; 172; 198) has a round or oval shape.

6. Floor nozzle device according to one of the preceding claims, characterized in that a cross-sectional width (b*) of the channel device (92; 92'; 168; 196) which is between lateral channel walls (108a, 108b; 132a, 132b) in the width direction ( 24) remains the same or decreases from the mouth (94; 134; 170) to the opening (84) of the suction port (80; 136; 172; 198).

7. Floor nozzle device according to one of the preceding claims, characterized in that a cross-sectional height (h) of the channel device (92; 92'; 168; 196) which is between an upper channel wall (110b; 130) and a lower channel wall (110b; 128) in a height direction (96) transverse to the width direction (24), starting from the mouth (94; 134; 170) to the opening (84) of the suction connection (80; 136; 172; 198) increases, whereby the lower channel wall (110b; 128) faces the bottom side (56) and the upper channel wall (110b; 130) faces the lower channel wall (110b; 128).

8. Floor nozzle device according to one of the preceding claims, characterized in that a distance between the channel means (92;

92'; 168; 196) towards the bottom side (56), starting from the mouth (94; 134; 170) towards the suction port (80; 136; 172; 198).

9. Floor nozzle device according to one of the preceding claims, characterized in that the mouth (94; 134; 170) is spaced from an underside (54) of a body (20) of the floor nozzle device, on which the receiving chamber (44) is arranged.

10. Floor nozzle device according to one of the preceding claims, characterized in that the channel device (92') has at least one coarse dirt removal device (144; 146) which leads into the receiving space (46).

11. Floor nozzle device according to Claim 10, characterized by at least one of the following: a height of the channel device (92') on the at least one coarse dirt removal device (144; 146) in a height direction (96) transverse to the width direction (24) is greater than a height of the channel device (92') outside the at least one coarse dirt removal device (144; 146); a height of the mouth (134) on the at least one coarse dirt removal device (144; 146) is in the range between 5 mm and 30 mm; the at least one coarse dirt removal device (144; 146) is arranged and, in particular, spaced apart, relative to the width direction (24), between a lateral outer end of the channel device (92') and a central plane (142) which is oriented perpendicularly to the width direction (24). to the lateral outer end and in particular spaced from the median plane (142); at least two and in particular exactly two coarse dirt removal devices (144, 146) are provided;

Coarse dirt removal devices (144/146) are arranged symmetrically to a central plane (142) which is perpendicular to the width direction (24).

12. Floor nozzle device according to claim 10 or 11, characterized in that at least one recess (148) is formed on a wall of the channel device (92') to form the at least one coarse dirt removal device (144; 146).

13. Floor nozzle device according to claim 12, characterized by at least one of the following: the at least one recess (148) is formed on an upper side (130) of the wall of the channel device (92'), which faces away from the bottom side (56); the at least one recess (148) forms a channel-shaped cross-sectional area enlargement area (152) towards an interior space of the channel device; the at least one channel device (92') has a rounded wall profile at the at least one recess (148).

14. Floor nozzle device according to one of the preceding claims, characterized in that the mouth (134) has an underside (164) which faces the bottom side (56) and an upper side (166) opposite the underside (104), with at least one of the following: the underside (104) has a substantially rectilinear course; the upper side (166) has a course deviating from the straight line with steps and/or bulges; a distance between the bottom (104) and the top (106) is in the range between 2 mm and 30 mm; a distance between the underside (104) and the upper side (166) outside of any coarse dirt removal device (144; 146) that may be present is in the range between 2 mm and 15 mm.

15. Floor nozzle device according to one of the preceding claims, characterized in that a height (H) of the orifice (94; 134; 170) in a height direction (96) transverse to the width direction (24) is in the range between 2 mm and 30 mm and outside of a coarse dirt removal device (144; 146), if one is present, is in the range between 2 mm and 15 mm.

16. Floor nozzle device according to one of the preceding claims, characterized in that the channel device (92') at the mouth (134) relative to the width direction (24) has a first region (158) which is defined by a lateral outer channel wall (132a; 132b) and has a second area (160) which adjoins the first area (158), the first area (158) having a smaller height (162) than the second area (160).

17. Floor nozzle device according to claim 16, characterized in that the height (162) of the first region (158) is in the range between 2 mm and 8 mm.

18. Floor nozzle device according to claim 16 or 17, characterized in that the height (156) of the second region (160) is in the range between 5 mm and 30 mm and outside of a coarse dirt removal device (144; 146), if such is present , is in the range between 5 mm and 15 mm.

19. Floor nozzle device according to one of the preceding claims, characterized in that a width (b2) of the receiving space (46) in the width direction (24) is at least 400 mm.

20. Floor nozzle device according to one of the preceding claims, characterized in that at least one flow area (114; 140; 174) is arranged or formed in the channel device (92; 92'; 168; 196).

21. Floor nozzle device according to claim 20, characterized by at least one of the following: the at least one flow area (114; 140; 174) is formed by a recess (116) on the channel device (92; 92';168;196); the at least one flow area (114; 140; 174) is at a distance from the mouth (94; 134; 170); the at least one flow area (114; 140; 174) is at a distance from the suction connection (80; 136; 172; 198); the at least one flow area (114; 140; 174) lies on a central plane (66; 142; 176); the at least one flow area (114; 140; 174) is symmetrical or asymmetrical to a central plane (66; 142; 176) of the channel device (92; 92';168; 196), the central plane (66; 142; 176) being vertical to the width direction (24) orien benefits, arranged and / or formed; the at least one flow area (174) has a geometric center (178) and an extension (di) of the at least one flow area (174) away from the center (178) perpendicular to the width direction (24), this extension being greater than a width (d2) of the at least one Flow area (174) parallel to the width direction (24) at the geometric center; a cross-sectional area (A2) of the at least one flow area (114; 140; 174), which forms a blocking area for a flow, is at most 90% of a total cross section (A1+A2+A3) of the channel device including the at least one flow area (114; 140; 174); the at least one flow area (114; 140; 174) is edge-free or provided with edges; the at least one flow area (114; 140; 174) has the shape of an egg or a drop.

22. Floor nozzle device according to claim 20 or 21, characterized in that a flow resistance coefficient (c _w ) for the at least one flow area (114; 140; 174) is less than or equal to 3 with a Reynolds number of 2300.

23. Floor nozzle device according to one of the preceding claims, characterized in that the channel device (92; 92') is arranged above a sliding base (74) relative to the bottom side.

24. Floor nozzle device according to one of the preceding claims, characterized in that a drive motor (64) for the at least one cleaning roller (48) is arranged on a body (20) of the floor nozzle device and that the drive motor (64) is connected between the suction connection (82 ) and the mouth (94) of the duct device (92), with the duct device (92), in particular, being asymmetrical in relation to a central plane (66) which is perpendicular to the width direction (24) in order to provide space for the drive motor (64). is.

25. Floor nozzle device according to one of the preceding claims, characterized in that the at least one cleaning roller (48; 183) is a brush roller or textile roller.

26. Floor nozzle device according to one of the preceding claims, characterized in that the channel device (92; 92'; 168) is designed in one piece.

27. Floor nozzle device according to one of the preceding claims, characterized in that in a cleaning operation of the floor nozzle device rotates the at least one cleaning roller (48; 183) and the suction connection (80; 198) is subjected to a suction flow.

28. Vacuum cleaning device, comprising a suction fan device (16; 190) and a floor nozzle device (12; 182) according to one of the preceding claims, wherein the suction fan device (16; 190) is in fluid communication with the suction connection (80; 198).

29. Vacuum cleaning device according to claim 28, characterized by an off education as a carpet brush vacuum cleaning device.

30. Vacuum cleaning device according to claim 28 or 29, characterized by a design as an up-right device which can be operated by a standing operator.

31. Vacuum cleaning device according to claim 28 or 29, characterized by a design as a self-propelled and self-steering cleaning device.

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