EP3923775A1

EP3923775A1 - Floor nozzle for a cleaning device having a vacuuming function, cleaning device and method for vacuum cleaning a floor region

Info

Publication number: EP3923775A1
Application number: EP20704819.0A
Authority: EP
Inventors: Markus SPROLL; Miriam Griepenburg; Christoph HÖRSCH; Felix Treitz; Florian EBERT
Original assignee: Alfred Kaercher SE and Co KG
Current assignee: Alfred Kaercher SE and Co KG
Priority date: 2019-02-13
Filing date: 2020-02-07
Publication date: 2021-12-22
Also published as: WO2020165049A1; DE102019103651A1

Abstract

The invention relates to a floor nozzle for a cleaning device (12) having a vacuuming function, which nozzle comprises a nozzle body (18), a first vacuum cleaning region (48) which is arranged on the nozzle body (18), at least one second vacuum cleaning region (62) for coarse dirt, which second vacuum cleaning region is arranged on the nozzle body (18) and which, in relation to a pushing direction (42) of the floor nozzle along a floor (30) to be cleaned, is located upstream of the first vacuum cleaning region (48), and a flow divider (64) which is arranged on the nozzle body (18) and which divides a suction flow (16) into at least one first partial flow (66), which is supplied to the first vacuum cleaning region (48), and into at least one second partial flow (68) which is supplied to the at least one second vacuum cleaning region (62). The invention also relates to a cleaning device having a vacuuming function and to a method for vacuum cleaning a floor region.

Description

Floor nozzle for a cleaning device with suction function,

Cleaning device and method for vacuuming a floor area

The invention relates to a floor nozzle for a cleaning device with suction function.

The invention also relates to a cleaning device with a suction function.

The invention also relates to a method for vacuuming a floor area with a floor nozzle.

A robot vacuum cleaner is known from WO 2016/037635 A1.

WO 2015/052425 A1 discloses a steam cleaner.

DE 600 01 818 T2 discloses a vacuum cleaner mouthpiece with a squeegee.

WO 2016/142662 A1 discloses a suction nozzle for a vacuum cleaner.

GB 2 381 443 A discloses a cleaning head for vacuuming.

DE 10 2014 105 756 A1 discloses a floor care device with a

Exhaust air recirculation.

DE 10 2014 103 686 A1 discloses a floor care device with a front and a rear suction mouth.

DE 10 2014 012 347 B3 discloses a floor nozzle for a vacuum cleaner.

DE 10 2017 113 466 A1 also discloses a floor nozzle for a vacuum cleaner. US 6,039,817 discloses a vacuum cleaner.

US 2002/0133903 Al discloses a floor cleaning tool for

Vacuuming up dust and debris.

The invention is based on the object of providing a floor nozzle of the type mentioned at the outset which has an effective cleaning effect.

This object is achieved according to the invention in the floor nozzle mentioned at the outset in that a nozzle body is provided, that a first suction area is provided, which is arranged on the nozzle body, that at least one second suction area for coarse dirt is provided, which is arranged on the nozzle body and which, based on a thrust direction of the floor nozzle on a floor to be cleaned, is upstream of the first suction area, and that a flow splitter device is provided which is arranged on the nozzle body and which generates a suction flow in at least a first partial flow to act on the first suction area and in at least one second partial flow for loading the at least one second suction area.

The floor nozzle according to the invention has a first suction area and at least one second suction area for coarse dirt. The first suction area and the second suction area can be optimized separately. In particular, the first suction area can be implemented as a suction area for fine dirt.

By providing the at least one second suction area, coarse dirt can essentially be prevented from entering the first suction area or coarse dirt can be suctioned off which cannot reach the first suction area. If the floor nozzle is designed, for example, as a floor nozzle for a textile floor, then it is advantageous if the first suction area has as fluid-tight a closure as possible on a floor area. This can be achieved in particular by means of web elements which are immersed in the textile material of the floor. However, these web elements prevent coarse dirt (larger dirt particles) from getting into the first suction area.

By providing the at least one second suction area, which is located in front of the first suction area in the pushing direction, coarse dirt can also be suctioned off. This results in effective cleaning.

The flow splitter device divides a suction flow, which acts on the floor nozzle, into at least one first partial flow and at least one second partial flow. That partial flow (the at least one second partial flow) which is used for suction at the second suction area is therefore generated at the floor nozzle. This results in a simple construction of the floor nozzle. For example, there is no need for an additional joint and, in principle, no valve for opening or closing is necessary.

The second extraction area can be easily integrated into a floor nozzle.

It can also be achieved that the floor nozzle can easily be driven under.

In the floor nozzle according to the invention, (at least) one main channel for the first suction area and (at least) one secondary channel for the second suction area are provided in particular.

A relatively high flow speed can be achieved in a simple manner for the second suction area, so that effective suction is achieved even with low power levels of a suction unit. In principle, it is provided that the floor nozzle is operated in such a way that suction takes place at the same time on the first suction area and at least one second suction area. However, it is also possible that suction can be switched off at the at least one second suction area.

It is particularly advantageous if the first suction area and the at least one second suction area are separated from one another in a fluid-tight manner in such a way that, when the floor nozzle is operating properly, no significant suction of the first suction area takes place via the at least one second suction area, and that no significant suction of the at least a second suction area over the first suction area he follows. This allows the first suction area and the at least one second suction area to be optimized separately. For example, if the floor nozzle is designed as a textile nozzle (floor nozzle for a textile floor), the at least one second suction area is sealed off from the first suction area by corresponding

Bar elements, which are assigned to the first suction area, dip into the textile material of the floor.

It can be provided that (i) a second suction area for coarse dirt in a forward thrust direction of the floor nozzle is upstream of the first suction area, or that (ii) a second suction area for coarse dirt in a backward thrust direction of the floor nozzle, which is opposite to the forward thrust direction, the first Suction area is upstream, or that (iii) a second suction area for coarse dirt is upstream of the first suction area in the forward thrust direction, and that a third suction area as a further second suction area for coarse dirt is upstream of the first suction area in the backward thrust direction. In these exemplary embodiments, coarse dirt extraction can be achieved if the floor nozzle is moved forward in the forward thrust direction (case (i)), or if the floor nozzle is moved backward in the backward thrust direction. ten is moved (case (ii)), or a coarse dirt extraction can be achieved in both thrust directions (case (iii)).

It is structurally favorable if the floor nozzle has a single connection for a suction unit which is connected to the flow divider device in a fluid-effective manner. This means that the floor nozzle can be connected to a large number of cleaning devices; the floor nozzle can be acted upon by a "single" suction flow, and the at least one first partial flow and the at least one second partial flow is generated directly at the floor nozzle.

In one embodiment, the flow splitter device is on one

Nozzle arranged or formed, wherein in particular a suction pipe or suction hose is connected to the nozzle or a connection for a suction pipe or a suction hose is arranged. The connecting piece then simultaneously forms a receptacle, in particular for a suction pipe of the cleaning device, and forms the flow divider device. This results in a structurally simple structure, and the number of parts can be kept low. Furthermore, this results in good accessibility for the floor nozzle.

In particular, a main channel of the connector is fluidically connected to the first suction area. The main channel of the nozzle is a first flow channel, which is fluidly connected to the first suction area.

In particular, at least one first suction channel then leads from the flow splitter device to the first suction area. The at least one first partial flow flows in the at least one first suction channel.

The at least one first suction channel has at least one first suction port which is assigned to the first suction area. Dirt can be sucked off via the at least one first suction opening. In one embodiment, the at least one first suction opening opens into a suction space of the first suction area. It can be provided that the suction space itself is suctioned off, or that, for example, a cleaning roller is suctioned off.

In particular, at least one of the following is provided: the suction space of the first suction area is open to the underside of the nozzle body; the suction space of the first suction area is an empty space or a brush and in particular a rotatable brush roller is arranged in the suction space; the suction space of the first suction area is delimited by opposing web elements which are arranged or ge forms on the nozzle body; the suction space of the first suction area is arranged and formed in such a way that the at least one first partial flow of the suction flow acts on the suction space as a whole.

If the suction space of the first suction area is open to the underside of the nozzle body, a corresponding floor area can be suctioned off when the floor nozzle is placed on a floor. If the suction area is an empty space or if a brush is arranged in the suction space, the suction space in particular can be suctioned off. A floor area that delimits the extraction space can then be vacuumed. If a brush and, in particular, a rotatable brush roller is also provided, a corresponding floor can also be cleaned by applying it to the brush. In particular, the rotatable brush roller is designed as a carpet roller. The first suction area can be closed off in a fluid-tight manner by means of opposing web elements. This results in an effective suction effect.

It is provided in particular that the opposing web elements are designed as immersion elements in the textile material of a textile floor. This results in an effective extraction of fine dirt for a textile floor.

Sliding elements and in particular elastic sliding elements can be provided for a hard floor. In particular, it is advantageous if it is possible to switch between a cleaning function for textile floors and a cleaning function for hard floors. In the case of a cleaning function for textile floors, the web elements are effective and can in particular penetrate the textile material of the floor. With a cleaning function for hard floors, the floor nozzle is placed on the floor via the sliding elements and the web elements (which could otherwise penetrate into textile material) are not effective and are spaced from the floor.

In one embodiment, at least one roller with textile trim is arranged on the first suction area and the at least one first suction opening is arranged and designed in such a way that suction takes place from the at least one roller. In this embodiment, a suction space is not sucked off as a space, but there is a direct suction from a roller. A corresponding floor nozzle is advantageous when the roller is moistened. Moist fluid can then be sucked off directly from the at least one roller via the first suction area.

It is then favorable if the at least one first suction opening is assigned an opening wall which, at least in part, rests against the textile trim of the at least one roller or is immersed in it. This allows fluid to be released from the roller and improved suction takes place. It is advantageous if at least one second suction channel leads from the flow splitter device to the at least one second suction area. As a result, the at least one second suction area can be arranged separately from the first suction area and a suction flow can also be applied separately therefrom. In particular, the at least one second suction channel is separate from at least one first suction channel for the first suction area. A correspondingly simple design results. Furthermore, the at least one second suction channel can be designed in such a way that a relatively high flow speed results for the second suction area, especially at a second flow mouth, in order to achieve effective coarse dirt suction even with smaller suction unit outputs.

In particular, the at least one second suction channel leads from a socket to the at least one second suction area. The result is a simple constructive structure. The floor nozzle can easily be driven under.

In one embodiment it is provided that a length of the at least one second suction channel (as a length starting from a flow divider device up to a second suction opening) is at least 20 mm.

This results in effective suction. In particular, a high flow rate can be achieved.

It is favorable if the at least one second suction channel has at least one second suction opening which is assigned to the at least one second suction area. This enables effective suction to be achieved.

It is also favorable if the at least one second suction opening opens into a suction space of the at least one second suction area. Effective coarse dirt extraction can thus be achieved. In particular, at least one of the following is provided: the suction space of the at least one second suction area is open to an underside of the nozzle body; the suction space of the at least one second suction area is open in the pushing direction; the suction space of the at least one second suction area is open to one side of the nozzle body; a guide device for coarse dirt is aligned with the at least one second suction mouth.

Effective coarse dirt extraction can thus be achieved.

It is particularly advantageous if an effective cross-sectional area of the at least one second suction opening is smaller than an effective cross-sectional area of a first suction opening which is assigned to the first suction area. This makes it possible to achieve a greater flow velocity for the suction at the at least one second suction area.

In this way, effective suction of coarse dirt can be achieved even with relatively small powers of a suction unit.

In particular, it is advantageous if an effective cross-sectional area of the at least one second suction opening in the range between 15 mm ² and

2400 mm ² .

In one embodiment, the suction space of the at least one second suction area is formed by at least one channel which is attached to the

The nozzle body is arranged and formed and extends in a width direction of the nozzle body and in particular extends essentially over an entire width of the nozzle body. The gutter is to a bottom of the Nozzle body open. In the at least one channel, a

Develop a cross flow in order to effectively suck up coarse dirt.

In one embodiment, the at least one channel is closed towards a transverse side of the nozzle body and open towards an opposite transverse side of the nozzle body. As a result, a cross flow can be formed in the channel, which enables an optimized extraction of coarse dirt.

In particular, the at least one second suction opening opens into the at least one channel at an end region of the at least one channel. This enables a cross flow to be formed in an effective manner.

Advantageously, the end region of the at least one channel is adjacent to an area of the at least one channel at which the at least one channel is closed to a transverse side of the nozzle body. As a result, over a large width of the rotating body in the at least one channel, a cross-flow effective for the extraction of coarse dirt can be formed.

It is provided that the at least one channel is closed in the thrust direction, or that one or more openings are arranged or formed on the nozzle body, by means of which the at least one channel is open in the thrust direction. When the channel is closed in the pushing direction, for example, coarse dirt can get into the channel by providing a corresponding wedge surface which, as it were, pushes coarse dirt into the at least one channel. In particular, coarse dirt is then pressed through a textile covering of a corresponding textile floor in the min least one channel. Alternatively, it can be provided that one or more openings are arranged or formed on the nozzle body, by means of which the at least one channel is open in the thrust direction. This allows coarse dirt through the at least one opening into the get at least one channel, and be sucked off there via the cross flow.

For effective suction, it is advantageous if a ratio of a length of the at least one second suction channel to a length of the at least one channel (or to a width of the rotating body in the width direction) in the width direction is in the range between 0.5 and 0.8 lies.

It is particularly advantageous if a guide device for coarse dirt is arranged on the nozzle body, through which coarse dirt can be guided to the at least one second suction area. It is thereby possible to form a suction space of the at least one second suction area or a second suction opening, which is assigned to the at least one second suction area, with a relatively small cross-sectional area. This in turn enables high flow velocities for high suction. The guide device is, in particular, a mechanical device which ensures the transport of dirt particles to the second suction area or supports this transport.

In particular, the guide device is designed as a funnel device or comprises such a funnel device. The funnel device is directed from a funnel opening, which is in particular part of the second suction area from.

In one embodiment, the funnel device has at least one wall which is at an acute angle to a width direction of the nozzle body, in particular the width direction being perpendicular to the thrust direction of the floor nozzle, and in particular the funnel device has at least a first wall and a second wall which are aligned with at least one second suction opening of the at least one second suction area. In this way, coarse dirt can be guided mechanically to the at least one second suction area. Dirt particles can so to speak "fall down" on the funnel device towards the at least one second suction area.

It is favorable if the acute angle is at least 5 ° in order to achieve an effective coarse dirt line to the at least one second suction area.

In one embodiment, the funnel device has an opening which lies centrally between a first transverse side of the nozzle body and a second transverse side of the nozzle body, in particular a width direction of the nozzle body running between the first transverse side and the second transverse side, the funnel device in particular having a wedge area having. The opening is part of the at least one second suction area. In this way, coarse dirt can be directed towards the opening and thus towards the at least one second suction area and sucked off there.

It is also possible for the funnel device to have a plurality of openings, the funnel device in particular having a plurality of wedge regions. For example, a sawtooth-shaped guide device can be implemented, with suction taking place at several points, i.e. in particular there is a plurality of second suction areas.

It is advantageous if a sliding surface for a floor to be cleaned is arranged or formed on the nozzle body. This allows the floor nozzle to be guided over a floor to be cleaned. In addition, it can be provided that the floor nozzle is supported by a roller device and can be moved over the floor to be cleaned via this. The sliding surface ensures that the suction areas are positioned appropriately on the floor to be cleaned.

In one embodiment, the at least one second suction area is assigned a strip element which is front relative to the pushing direction and which is or is aligned with an underside with respect to the sliding plane is spaced from the slip plane. Depending on the design of the floor nozzle, an optimized suction can be achieved.

In particular, a distance (as the minimum distance) between the underside of the strip element and the sliding plane is in the range between 0 mm and 6 mm.

In one embodiment, the strip element is provided with an inclined plane in relation to the sliding plane, in particular an angle of the inclined plane to the sliding plane being at least 2 °. The inclined plane faces a floor to be cleaned when the floor nozzle is in operation. Dirt particle guidance can be achieved via them. In particular, an opening that widens in the pushing direction is formed over the strip element with the inclined plane. If there is a dirt particle in the opening and the floor nozzle moves with the strip element over the dirt particle, it can be pressed over the strip element in the direction of the floor. If this is flexible, like a textile floor, then a dirt particle can be passed into the at least one channel via the strip element. Even if, for example, a distance between the underside of the strip element and the sliding plane is very small or zero, in the case of a textile floor a dirt particle can still be pressed through the floor via the strip element into the channel. The strip element acts as a wedge element which exerts a corresponding normal force on dirt particles in order to guide them into the at least one channel.

The front bar element can be part of a guide device for coarse dirt and / or part of a wall of the at least one second suction area.

It is favorable if, when the floor nozzle is in operation, suction takes place at the first suction area and at the at least one second suction area at the same time. In particular, both fine dirt suction via the first suction area and coarse dirt suction via the at least one second suction area can thus be achieved. It is also possible for a switch to be assigned to the at least one second suction area, by means of which the application of the at least one second partial flow can be switched. In this way, for example, the application of suction current to the at least one second suction area can be switched off if the output of a suction unit is too low. For example, it is thereby also possible to switch off the application of the second suction area when the floor nozzle is used for hard floors.

According to the invention, a cleaning device with a suction function is provided, on which a floor nozzle according to the invention is arranged.

The cleaning device is, for example, a vacuum cleaner or a wet wipe cleaning device.

According to the invention, a method for vacuuming a floor area with a floor nozzle and in particular with a floor nozzle according to the invention is provided, in which a first extraction area is acted upon with at least a first partial flow of a suction flow, and in which at least one second extraction area for coarse dirt with at least a second partial flow of the Suction flow is applied, wherein the at least one second suction area is upstream of the first suction area in a thrust direction of the floor nozzle, and wherein the at least one first partial flow and the at least one second partial flow are generated at the floor nozzle by flow division from the suction flow.

The method according to the invention has the advantages already explained in connection with the floor nozzle according to the invention.

The following description of preferred embodiments is used in conjunction with the description to explain the invention in more detail. Show it : Figure 1 is a plan view of a partial representation of a first exemplary embodiment from a floor nozzle according to the invention;

FIG. 2 shows a side view of the floor nozzle according to FIG. 1 in the direction

A;

FIG. 3 shows a plan view of the floor nozzle in the direction B according to FIG

Figure 1;

FIG. 4 shows a bottom view of the floor nozzle according to FIG. 1 in the direction

C;

FIG. 5 shows a front view of a second exemplary embodiment of a floor nozzle according to the invention in a partial representation;

FIG. 6 shows a side view of the floor nozzle according to FIG. 5 in the direction

D;

Figure 7 is a bottom view of a third embodiment of a

floor nozzle according to the invention;

Figure 8 is a bottom view of a fourth embodiment of a

floor nozzle according to the invention;

Figure 9 is a front view of a fifth embodiment of a floor nozzle according to the invention (in partial representation),

FIG. 10 shows a view from below in direction E of the floor nozzle according to FIG. 9;

FIG. 11 shows a view from below of a sixth exemplary embodiment of a floor nozzle according to the invention; FIG. 12 shows a view from below of a seventh exemplary embodiment of a floor nozzle according to the invention;

FIG. 13 shows a front view of an eighth exemplary embodiment of a floor nozzle according to the invention in partial representation;

FIG. 14 shows a side view of the floor nozzle according to FIG. 13 in the direction E;

FIG. 15 shows a plan view of the floor nozzle according to FIG. 13 in the direction F;

FIG. 16 shows a bottom view of the floor nozzle according to FIG. 13 in the direction G;

FIG. 17 shows a front view of a ninth exemplary embodiment of a floor nozzle according to the invention;

FIG. 18 a side view of the floor nozzle according to FIG. 17;

FIG. 19 shows a front view of a tenth exemplary embodiment of a floor nozzle according to the invention;

FIG. 20 shows an embodiment of a robot vacuum cleaner with a floor nozzle in FIG

Front view; and

FIG. 21 shows a bottom view of the robot vacuum according to FIG. 20.

A first embodiment of a floor nozzle 10 according to the invention, which is shown in Figures 1 to 4 (in Figures 1, 3, 4 in part), is provided for connection to a cleaning device 12 (Figure 2) with suction function. The cleaning device 12 has in particular a suction unit 14 which generates a suction flow 16. The cleaning device 12 is, for example, a vacuum cleaner or a wet mopping device for a floor with a suction function.

The floor nozzle 10 can be detachably connected to the cleaning device 12, or it can be permanently connected to the cleaning device 12 as a floor head.

The floor nozzle 10 has a nozzle body 18. In one embodiment, the nozzle body has a region 20 which is at least approximately cuboid. A connecting piece 22 is arranged on this region 20. The connecting piece 22 has a connection 24 to which a suction hose or suction tube 26 of the cleaning device 12 can be connected or connected, either permanently or detachably.

The nozzle body 18 has an underside 28. When the floor nozzle 10 is in operation, this underside 28 faces a floor 30 to be cleaned. At least part of the underside 28 forms a sliding plane 32, via which the floor nozzle 10 can be guided on the floor 30.

In one embodiment, a roller device 34 is arranged on the nozzle body 18 (FIG. 2; not shown in FIGS. 1, 3 and 4), which serves to support the floor nozzle 10 (and thus also the cleaning device 12) on the floor 30 to be cleaned. During a cleaning process, the floor nozzle 10 can be moved via the roller device 34 on the floor 30 to be cleaned.

The nozzle body 18 has a first transverse side 36 and an opposite, second transverse side 38 in the area 20. The area 20 of the nozzle body 18 extends between the first transverse side 36 and the second transverse side 38 in a width direction 40.

For a cleaning operation on the floor 30 to be cleaned, the floor nozzle 10 (with the cleaning device 12) in a thrust direction 42 on the to cleaning floor 30 moves. The thrust direction 42 is thus transverse to the width direction 40 of the floor nozzle 10. In particular, the thrust direction 42 is at least approximately perpendicular to the width direction 40.

In one embodiment, the connector 42 is arranged centrally between the first transverse side 36 and the second transverse side 38 on the region 20.

The area 20 of the nozzle body 18 has a rear side 44 and a front side 46. The rear side 44 faces the roller device 34 (see FIG. 2).

When the floor nozzle 10 is operating properly, the thrust direction 42 lies in a direction from the rear side 44 to the front side 46.

A first suction area 48 is arranged on the nozzle body 18. This first suction area 48 comprises a suction space 50 which is arranged on the area 20 and which extends in the width direction 40 (compare FIG. 4).

The suction space 50 lies between a first web element 52 and a second web element 54 (FIG. 4). The first bar element 52 and the second bar element 54 are spaced apart from one another. They each extend in the width direction 40. In particular, the first web element 52 and the second web element 54 are aligned parallel to one another. Furthermore, in particular the first bar element 52 and the second bar element 54 are just formed. The first bar element 52 and the second bar element 54 form seals for the first suction area 48.

The thrust direction 42 lies transversely and in particular perpendicular to the first web element 52 and the second web element 54. On the transverse sides 36, 38 a wall 56 is arranged between the first web element 52 and the second web element 54, which wall 56 closes the suction space 50 of the first suction area 48 laterally.

The floor nozzle 10 is designed for cleaning textile floors. The first web element 52 and the second web element 54 are designed in such a way that they can penetrate into the textile material of the textile floor. In particular, they protrude somewhat beyond the sliding plane 32.

In this way, an area of the corresponding base 30, which lies between the first web element 52 and the second web element 54, can be effectively suctioned off; With the floor nozzle 10 appropriately laid out on the floor 30, a good seal on the floor 30 in terms of fluid tightness is achieved in the suction space 50 in order to achieve an effective suction result.

A first suction channel 58 is assigned to the first suction area 48 and opens into the suction space 50 with (at least) a first suction opening 60.

The first suction channel 58 is formed on the connecting piece 22; At least one first partial flow (see below) of the suction flow 16 can be applied to the first suction region 48 via the first suction channel 58.

The first suction opening 60 is arranged centrally between the first transverse side 36 and the second transverse side 38 on the suction space 50.

Between the first web element 52 and the second web element 54 there is a central web 53, aligned parallel to them. This is interrupted by the first suction opening 60.

In one embodiment, the suction space 50 is designed like a dome and is correspondingly aligned with the first suction opening 60. The first suction opening 60 has, for example, a circular shape, an oval shape or a rectangular shape (see FIG. 4).

A second suction area 62 is arranged on the nozzle body 18. This second suction area 62 is used to suction off coarse dirt. Due to the web elements 52, 54 (and in particular the second web element 54) on a textile floor 30, when the floor nozzle 10 is in operation, coarse dirt with larger dirt particles cannot enter the first suction area 48 for long. The second suction area 62 is upstream of the first suction area 48 in the pushing direction 42 (transversely to the width direction 40) in order to be able to suck off coarse dirt separately from the first suction area 48 using the floor nozzle 10.

In relation to the operation of the floor nozzle 10, the first suction area 48 and the second suction area 62 are separated from one another at least approximately in a fluid-tight manner; If the floor nozzle 10 is placed on a floor 30 and in particular a textile floor, there is no substantial suction from the second suction area 62 via the first suction area 48, and there is no substantial suction from the first suction area 48 via the second suction area 62 Floor nozzle 10 is designed in such a way that essentially no “short-circuit currents” arise between the first suction area 48 and the second suction area 62. In particular, the second web element 54, which is immersed in the textile floor 30 during operation, causes a fluid-tight separation of the second suction area 62 from the first suction area 48.

A flow splitter device 64 is arranged on the nozzle body. This flow splitter device 64 divides the suction flow 16, which is provided by the suction unit 14, into (at least) a first partial flow 66 and (at least) a second partial flow 68. The first partial flow 66 of the suction flow 16 acts on the first suction area 48, that is to say suction takes place via this at the suction space 50. The second partial flow 68 acts on the second suction area 62. The flow divider device 64 is formed on the connection piece 22. In relation to the suction flow 16, it is formed downstream of the connection 24. The flow of the suction stream 16 is divided into the first substream 66 and the second substream 68 at the floor nozzle 10 (and not at the cleaning device 12 outside the floor nozzle 10).

The first partial flow 66 flows in the first suction channel 58; The first suction port 60 establishes the flow connection to the suction space 50.

A second suction channel 70, which leads from the nozzle 22 to the second suction area 62, is connected to the nozzle 22.

The second suction channel 70 is formed in particular by a hose or a tube 72 which leads from the connector 22 outside the connector to the area 20 of the nozzle body and is connected to the second suction area 62 in a fluid-effective manner.

The second partial flow 68 of the suction flow 16 flows in the second suction channel 70.

In particular, the second suction channel 70 is connected to an upper side 74 of the connector 22 and is guided in an arc.

On the second suction channel 70 (at least) one second suction opening 76 is arranged, which opens into a suction space 78 of the second suction area 62 (see FIG. 4).

The second suction port 76 has a circular, oval or rectangular shape, for example. In the case of a rectangular shape, in particular a longer side is parallel to the width direction 40 and a shorter side is transverse and in particular perpendicular thereto. It is also preferably provided that a longer side of the second suction port 76, if this is rectangular, is at most twice as long as the shorter side.

The suction space 78 is open to the front side 46. The nozzle body 18 has an opening 80 here. In the opening 80, when the floor nozzle 10 is moved on the floor 30 in the thrust direction 42 during operation, dirt particles can get into the opening 80 and then be sucked off via the second suction channel 70 with the second suction port 76.

The suction space 78 of the second suction opening 76 is open to the underside 28 of the nozzle body 18.

The suction space 78 is open to the second suction mouth opening 76 in order to enable suction. In cross-section, the size of the suction space 78 essentially corresponds to the second suction opening 76.

It is fundamentally the goal to achieve a relatively high flow velocity for the second suction area 62. This is achieved by a smaller channel cross section of the second suction channel 70 compared to the first suction channel 58. In particular, the effective cross-sectional area of the second suction opening 76 is smaller than the effective cross-sectional area of the first suction opening 60. If a plurality of second suction openings 76 or first suction openings 60 are present, then the effective cross-sectional area is made up of the individual cross-sectional areas of the respective suction openings.

In particular, an effective cross-sectional area of the second suction port 76 is in the range between (and including) 15 mm ² to (and including) 2400 mm ² .

It is also favorable if a length of the second suction channel 70 (the length between the connection 22 and the second suction opening 76) is at least 20 mm. A guide device 82 is arranged on the nozzle body 18. The guiding device 82 is used to feed dirt particles to the suction space 78 so that they can be suctioned off via the second suction opening 76.

In the case of the floor nozzle 10, the second suction opening 76 is arranged centrally between the first transverse side 36 and the second transverse side 38. In particular, the second suction port 76 is net angeord relative to a center plane of the floor nozzle 10 between the first transverse side 36 and the second transverse side 38. The nozzle 22 is preferably arranged symmetrically accordingly.

The guide device 82 is designed as a funnel device 84, the opening 80 corresponding to a funnel opening.

The funnel device 84 comprises a first wall 86 and a second wall 88. The first wall 86 is oriented at an acute angle 90 (FIG. 4) to the width direction 40. The second wall 88 is aligned at the acute angle 90 equal in amount to the width direction 40, but with the opposite sign.

A free space between the first wall 86 and the second wall 88 has the shape of a hollow triangle in cross section, a tip of this hollow triangle lying at the opening 80.

Inclined planes are then formed over the funnel device 84 with the first wall 86 and the second wall 88, via which dirt particles of the opening 80 can be fed.

A dirt particle that is caught by a wall 86 or wall 88 is carried along by the floor nozzle 10 and, as it were, falls down in the direction of the opening 80 until it can be sucked in via the second suction opening 76. The guide device 82 forms the front side 46 of the nozzle body 18.

A single opening 80 is provided in the floor nozzle 10.

On the nozzle body 18 sits a bar element 92, which the guide

device 82 with its walls 86, 88 forms. The strip element 92 has an underside 94. In the case of the floor nozzle 10, this underside 94 lies on the sliding plane 32.

It is also possible for the lower side 94 to be spaced apart from the sliding plane 32 and / or for the lower side 94 to be designed in the manner of an inclined plane. This is explained below using further exemplary embodiments.

The floor nozzle 10 works as follows:

In a suction mode in which the floor nozzle 10 is connected to the cleaning device 12, the suction unit 14 generates the suction flow 16. The suction flow 16 is coupled into the floor nozzle 10 via the connection 24.

The flow splitter device 64 divides the suction flow 16 into the first partial flow 66 and the second partial flow 68.

The first partial flow 66 acts on the first suction area 48. At the first suction area 48, a floor area between the web elements 52, 54 is suctioned off. To a certain extent, fine suction takes place.

The second suction area 62 is sucked off via the second partial flow, which flows in the second suction channel 70.

When the floor nozzle 10 moves over the floor 30 to be cleaned in the thrust direction 42, which is in particular a forward thrust direction, coarse dirt, which consists of larger dirt particles, can be sucked off become. In principle, dirt particles can be sucked off which, because of the second web element 54, cannot reach the first suction area 48. The dirt particles are fed via the guide device 82 (the funnel device 84) to the opening 80, where they can be sucked off via the second suction opening 76. The second suction channel 70 forms a secondary channel in comparison to the first suction channel 58; the first suction channel 58 is a main channel.

The floor nozzle 10 allows both fine dirt

Achieve suction via the first suction area 48 on a textile floor 30, as well as a suction of coarse dirt on the second suction area 62.

Basically, the suction on the first suction area 48 and the second suction area 62 is operated simultaneously.

In particular, separate optimization of the fine dirt suction for the first suction area 48 and a coarse dirt suction for the second suction area 62 is possible.

The suction flow for the second suction area 62 is a partial flow of the suction flow 16 and this second partial flow 68 is generated at the floor nozzle 10 itself.

Due to the relatively small suction opening 76, a high flow speed can be achieved with effective suction.

It can be provided that the flow splitter device 74 is assigned a switch 96 via which the second suction channel 70 can be switched off, that is to say via which the generation of the second partial flow 68 can be blocked. This can be advantageous, for example, if the suction unit 14 is operated with small powers and then no effective suction can be carried out via the second suction area 62.

According to the invention, a floor nozzle 10 is provided which, in addition to a main suction system via the first suction area 48, also has a secondary suction system for coarse dirt via the second suction area 62. Even when the performance of the suction unit 14 is relatively low, a sufficient flow velocity can still be generated in order to lift coarse dirt at the suction space 78 and suck it off.

The guide device 82 for coarse dirt ensures an effective transport of dirt particles, also at a transverse distance from the opening 80 to the opening 80. As a result, the effective cross-sectional area of the second suction opening 76 (and of the second suction channel 70) can be kept small in order to achieve a high flow velocity.

In particular, the acute angle 90 is at least 5 °. The acute angle 90 is preferably not greater than 25 °.

By means of the flow splitter device 64, the main suction on the first suction area 48 and the secondary suction on the second suction area 62 can be connected to one another at the floor nozzle 10. In particular, a rigid connection is possible via the tube or hose 72, and no additional joint is necessary.

As mentioned above, basically no valve or switch for opening or closing the second suction channel 70 is necessary. However, such a switch 96 can be advantageous for certain applications.

The second suction area 62 is to a certain extent placed in front of the first suction area 48. The first suction area 48 does not have to be adapted to the second suction area 62. This results in a con- structurally simple design of the floor nozzle 10 so that, as mentioned above, a separate optimization of the suction areas 48, 62 is possible.

The floor nozzle 10 can be designed with the area 20 in such a way that it has a low under-ride height (up to the nozzle or the pipe 72).

A second exemplary embodiment of a floor nozzle 98 according to the invention, which is shown in a partial representation in FIGS. 5 and 6, is basically designed the same as the floor nozzle 10 except for the strip element. A corresponding strip element 100 is provided which has an underside 102. The underside 102 is designed as an inclined plane. It is oriented at an acute angle 104 to a corresponding sliding plane 32 benefits. This acute angle 104 is preferably at least 2 °.

The strip element 100 is in particular part of a funnel device 84.

Otherwise, the floor nozzle 98 functions like the floor nozzle 10.

In the case of the floor nozzle 10 and the floor nozzle 98, the thrust direction 42 is a forward thrust direction for proper operation. In relation to this pushing direction 42, the second suction area 62 is located in front of the first suction area 48, that is, a certain area on a floor 30 to be cleaned is first passed over by the second suction area 62 and then passed over by the first suction area 48.

In a third exemplary embodiment of a floor nozzle 106 according to the invention (FIG. 7), a nozzle body 108 is provided on which a first suction area 110 and a second suction area 112 are arranged. When operating properly, the floor nozzle 106 has a thrust direction 114 which is a reverse thrust direction. In relation to this backward thrust direction 114, which is opposite to a forward thrust direction 116, the second suction area 112 is located in front of the first suction area 110. In particular, the second suction area 112 is arranged between a roller device 118 (which corresponds to the roller device 34 in the floor nozzle 10) and the first suction area 110.

An opening 120 of the second suction area 112 is positioned between spaced apart rollers 124a, 124b of the roller device 118 in relation to a width direction 122 (corresponding to the width device 40 in the case of the floor nozzle 10). Coarse dirt lying between the rollers 124a, 124b of the roller direction 118 can thus reach the opening 120 and be sucked off.

A guide device 126 corresponding to the guide device 82 in the floor nozzle 10 is assigned to the second suction area 112.

In the case of the floor nozzle 106, the second suction area 112 is effective when the floor nozzle 106 is moved in the backward thrust direction 114 on a floor 30 to be cleaned. When the floor nozzle 10 moves in the forward thrust direction 116, the second suction area 112 is generally ineffective, since no coarse dirt can reach it.

An operator can, for example, if he discovers coarse dirt, lift the floor nozzle 106 over the coarse dirt and then, placed on the floor 30, move it in the backward thrust direction 114 to ensure that coarse dirt is sucked in.

Otherwise, the floor nozzle 106 functions like the floor nozzle 10.

In a fourth embodiment 128 of a floor nozzle according to the invention (FIG. 8), a first suction area 132 is arranged on a nozzle body 130. This is used to suck off fine dirt, as explained above with reference to the floor nozzle 10. A second suction area 134 for coarse dirt is also arranged on the nozzle body. Furthermore, a third suction area 136 for coarse dirt is arranged on the nozzle body. The first suction area 132 (for fine dirt) lies between the second suction area 134 for coarse dirt and the third suction area 136 for coarse dirt. The third suction area 136 for coarse dirt is a further second suction area for coarse dirt.

For proper operation, a forward thrust direction 116 and a backward thrust direction 114 are provided for the floor nozzle 128 (FIG. 8).

In relation to the forward thrust direction 116, the second suction area 134 is located in front of the first suction area 132. In relation to the backward thrust direction 114, the third suction area 136 is upstream of the first suction area 132.

The third suction area 136 is preferably arranged with respect to a roller device 118 as described in connection with the floor nozzle 106.

During operation, the floor nozzle 128 can suck in coarse dirt both with a forward stroke in the forward thrust direction 116 via the second suction area 134 and with a backward stroke in the backward thrust direction 114 via the third suction area 136.

Otherwise, the floor nozzle 128 functions as described above with reference to the floor nozzle 10.

A fifth embodiment of a floor nozzle 138 according to the invention, which is shown in a partial representation in FIGS. 9 and 10, is designed similarly to the floor nozzle 10. It comprises a nozzle body 140 on which a first suction area 142 and several (in particular two) second suction areas 144 , 144 'are arranged. A guide device 146 is seated on the nozzle body 140. A first opening 148 is formed on this and a second opening 150 is formed at a distance from the first opening 148. The first opening 148 is spaced apart from a first transverse side 152 and from an opposite, second transverse side 154 of the nozzle body 140.

The guide device 146 has a first funnel device 156 which is aligned with the first opening 148, and has a second funnel device 158 which is aligned with the second opening 150.

A front side 160 of the nozzle body 130 with the guide device 146 thus has a sawtooth-shaped profile.

A nozzle 162 with a flow splitter device 164 is seated on the nozzle body 140. A first suction channel 166 leads from the flow splitter device 164 to the first suction area 132. A second suction channel 167 leads from the flow splitter device 164 to the opening 148. A third suction channel 168, which is a further, second suction channel, leads from the flow splitter device 164 to the second opening 150.

A second suction opening is provided on the second suction channel 167, which opens into a suction space at the first opening 148. A third suction opening is provided on the third suction channel 168, which opens into a suction space at the second opening 150.

A suction flow 169a, which is applied to the connection piece 162, is divided by the flow splitter device 164 into a first partial flow 169b, which flows in the first flow channel 166 and acts on the first suction area 132. It is further divided into a second partial flow 169c, which flows in the second suction channel 167, and into a third partial flow 169d (further second partial flow), which flows in the third suction channel 168. In the exemplary embodiment shown with several second suction areas 134 (in the exemplary embodiment shown the second suction area 134 and the third suction area 136), coarse dirt can be suctioned off at several points, namely at the first opening 148 and the second opening 150.

The first funnel device 156 is designed accordingly to supply coarse dirt to the first opening 148, and the second funnel

Device 158 is designed such that coarse dirt is fed to the second opening 150.

Otherwise, the floor nozzle 128 functions like the floor nozzle 10.

A sixth embodiment of a floor nozzle 170 according to the invention (FIG. 11) comprises a nozzle body 172. A first suction area 174 is arranged on the nozzle body 172. The first suction area 174 comprises a suction space 176 in which a first suction channel with a first suction opening opens.

A brush 178 is rotatably arranged in the suction space 176. The brush 178 is assigned a drive, for example, which is positioned on the nozzle body 172.

It is also possible that a movement of the floor nozzle 170 on a floor to be cleaned in a thrust direction 180 drives a rotation of the brush.

In one embodiment it is provided that no web elements corresponding to the web elements 52, 54 in the floor nozzle 10 on the

Nozzle body 172 are positioned. In the thrust direction 180, a second suction area 182 is upstream of the first suction area, as described, for example, with reference to the floor nozzle 10.

In the case of the floor nozzle 170, the suction space 176 is suctioned off, with the rotating brush 178 providing additional cleaning, in particular of a textile floor 30, during operation.

As described with reference to the floor nozzle 10, the second suction area 182 is located in front as a secondary suction area in order to be able to suck up coarse dirt.

In particular, a guide device for coarse dirt is also provided, which is oriented towards the second suction area 182.

In the first suction area 48 of the floor nozzle 10 or the first suction area 174 of the floor nozzle 170, a suction area is sucked off as a whole.

A seventh exemplary embodiment of a floor nozzle according to the invention, which is shown in FIG. 12 and denoted by 184, a nozzle body 186 is provided, on which a first suction area 188 is arranged.

On the nozzle body 186, a receiving space 190 for a roller 192 is seen before. The roller 192 is assigned a drive motor for rotation about an axis 194 of rotation. The drive motor is not shown in FIG.

The roller 192 has a textile trim 196.

In one embodiment, the roller 192 is designed in two parts with a first part 198a and a second part 198b. For example, a central drive is provided in which the drive motor acts via a gear on a central area of the roller 192 between the first part 198a and the second part 198b. A corresponding roller arrangement is described, for example, in WO 2016/058879, to which reference is expressly made.

At the floor nozzle 184, a flow splitter device is arranged, which is basically the same as described above with reference to the floor nozzle be.

A suction port device 200 is assigned to the roller 192. The suction opening device 200 comprises in particular a first suction opening 202 and a further first suction opening 204, the first suction opening 202 being assigned to the first part 198a of the roller 192 and the further first suction opening 204 being assigned to the second part 198b of the roller 192.

In particular, the first suction opening 196 has a length which essentially corresponds to the length of the first part 198a. Correspondingly, the further first suction opening 204 has a length which essentially corresponds to the length of the second part 198b.

A first suction flow for the first suction opening 202 and a further first suction flow for the further first suction opening 204 are provided via the flow splitter device.

A second suction channel in connection with a roller with textile trim is described, for example, in WO 2016/058856 A1, to which reference is expressly made.

Correspondingly, a first suction channel leads from the flow splitter device to the first suction opening 202 and a further first suction channel to the further first suction opening 204.

The first suction opening 202 and the further first suction opening 204 are designed such that they are connected to corresponding opening walls 206, which limit the first suction opening 202 or further first suction opening 204 on which the textile facing of the roller 192 rest or protrude into it. This is described in WO 2015/086083 A1, to which reference is expressly made.

The first suction opening 202 and the further first suction opening 204 are assigned at least one opening wall 206 which rests against the facing 196 and penetrates it. A mouth wall can accordingly be provided, or two opposing mouth walls can rest or dip into the trim.

A suction takes place directly on the roller 192. The first partial flow and the further first partial flow act directly on the roller 192 and suction takes place on the roller. There is at most an indirect suction in the receiving space 190.

In particular, it is also provided that the roller 192 is moistened via a corresponding moistening device. In this context, for example, reference is made to WO 2015/086083 A1.

Reference is made to WO 2016/058856 A1 with regard to a two-part suction channel in order to be able to suck off several areas of the roller 192, in the exemplary embodiment shown the first divider 198a and the second divider 198b.

A second suction area 210 is located in front of the nozzle body 186 in a thrust direction 208. The second suction area is basically designed in the same way as described with reference to the floor nozzle 10. In particular, a guide device for coarse dirt is provided.

Coarse dirt can be picked up in front of the first suction area via the second suction area 210. The second suction area 210 is supplied with at least one second partial flow of a suction flow through the flow splitter device. The flow divider device is part of the floor nozzle 184.

An eighth exemplary embodiment of a floor nozzle according to the invention, which is shown in a partial representation in FIGS. 13 to 16 and denoted by 212 there, comprises a nozzle body 214. A nozzle 216 with a flow splitter device 218 is seated on the nozzle body 214 The floor nozzle 10 can be connected to a cleaning device 12 via the connection 22 in the floor nozzle 10.

A first suction area 220 is formed on the nozzle body 214. This comprises a suction space 222 (see FIG. 16) which is open to an underside 224 of the nozzle body 214.

The first suction space 222 is basically designed in the same way as the first suction area 48 of the floor nozzle 10. A first web element and a second web element corresponding to the web elements 52, 54 are assigned to it.

Starting from the flow splitter device 218, a first suction channel 226 leads to a first suction opening 228, which opens into the suction space 222.

A channel 230 is arranged on the nozzle body 214. This channel is at a distance from the first suction area 222. It extends in a width direction 232 of the nozzle body 214. The width direction 232 runs between a first transverse side 234 and a second transverse side 236 of the nozzle body 214.

The channel 230 is open to the bottom 224. It is also open to the first transverse side 234. It is closed towards the second transverse side 236. The channel 230 is directed in particular parallel to the width direction 232.

In the exemplary embodiment, the channel 230 has the shape of a (hollow) half-cylinder.

A second suction channel 238 leads from the flow divider device 218 to the channel 230. The second suction channel 238 is connected to the channel 230 via a second suction port 240 for effective flow; The second suction channel 238 opens into the channel 230 via the second suction opening 240.

In one embodiment, the second suction port 240 has a circular cross-section (see Figure 16).

The second suction channel 238 runs between a connection 242 (see FIG. 16) of the flow splitter device 218 and the second suction opening 240. The second suction channel 238 is connected to the flow splitter device 218 via the connection 242. In particular, a length of the second suction channel 238 between the connection 242 and the second suction port 240 is at least 20 mm.

An effective cross-sectional area of the second suction port 240 is smaller than an effective cross-sectional area of the first suction port 228.

In particular, an effective cross-sectional area of the second suction opening 240 is in the range between 15 mm ² and 2400 mm ² .

A ratio of the length of the second suction channel 238 to a length of the channel 230 in the width direction 232 is in particular in the range between 0.5 and 0.8.

The second suction port 240 opens into the channel 230 in the vicinity of the second transverse side 236; the second suction port 240 is at an end region 244 the channel 230, which faces away from an opening 246, via which the channel 230 is open to the first transverse side 234. The end area 244 lies adjacent and in particular directly next to an area 248, via which the channel 230 is closed to the second transverse side 236.

The second suction channel 238 is formed on a hose or a pipe 250 which is guided from the flow splitter device 218 to the nozzle body 214 above the channel 230.

The channel 230 forms a suction space 252 of a second suction area 254 for coarse dirt. In relation to a pushing direction 256 (which is in particular transverse to the width direction 232), the second suction area 254 is located in front of the first suction area 220.

The flow splitter device 218 generates (at least) a first partial flow 260 from a suction flow 258, which acts on the first suction area 220, and (at least) a second partial flow 262 which acts on the second suction area 254.

Through the channel 230 with the opening 246, a transverse flow 264 (similar to FIG. 16) is generated when the floor nozzle 212 is in operation.

A strip element 266 is arranged or formed on the nozzle body 214 and closes off the channel 230 at a front side 268.

In one embodiment, the strip element 266 is provided with openings 270 (see FIG. 13), so that the channel 230 is also open towards the front side 260. Coarse dirt can get through the openings 270 into the channel 230 and be sucked off by the cross flow there via the second suction channel 238.

It can be provided that the at least one channel 230 over the

Bar element 266 is closed in the pushing direction 256. So that coarse dirt in the case of such a channel 230 closed in the thrust direction 256, the bar element 266 is formed in particular as a wedge element (see below); this allows coarse dirt to be pressed against the floor to be cleaned via the corresponding wedge element. If this is designed to be correspondingly flexible, and in particular if this is a textile floor, then coarse dirt can get under the strip element 266 through into the channel 230.

In one embodiment (see FIG. 14), the strip element 266 has an inclined plane 274 with respect to its underside 272.

This inclined plane 274 is at an acute angle with respect to a sliding plane 278 of the floor nozzle 212; A floor nozzle can slide over the sliding plane 278 over a floor to be cleaned and in particular a textile floor.

The acute angle 276 is in particular at least 2 °.

By the inclined plane 274, the strip element 266 is formed as a wedge element. An opening that widens in the direction of thrust is formed adjacent to the channel 230.

As described above, a coarse dirt particle 279, which is located in the opening 277 (which is downwardly bounded by the floor to be cleaned), can be pressed against the floor when driven over by the strip element 266 (the wedge element with the inclined plane 274). If this is designed as a textile floor, then the coarse dirt particles 279 can dip under the strip element 266 into the channel 230 and be sucked off there.

It is basically possible that a strip element 266, which is designed as a wedge element, is provided without openings, or is provided with openings 270. In the exemplary embodiment shown in FIG. 14, the strip element 266 lies in a region 280 on the underside 272 on the sliding plane 278.

The floor nozzle 212 works as follows:

During operation, the floor nozzle 212 is placed with its sliding plane 278 on a floor 30 to be cleaned. At the first suction area 220, fine dirt is suctioned off via the first partial flow 260.

Coarse dirt suction takes place via the second partial flow 262 at the second suction area 254, independently of the suction at the first suction area 220.

The second partial flow 262 generates a transverse flow 264 in the channel 230, through which coarse dirt can be carried along. In this case, coarse dirt enters the transverse flow 264 in particular via the openings 270.

A relatively high flow velocity can be generated at the second suction port 240. In this way, with a relatively low performance of a suction unit, a sufficient secondary flow for the suction of coarse dirt can still be generated at a second suction area 254.

The second suction channel 238 is arranged starting from the centrally located

Nozzle 216 guided on one side in the direction of the first transverse side 234. As a result, on the other side of the connection piece 216 (towards the second transverse side 236) there is still a low under-ride height for the floor nozzle 212.

A ninth embodiment of a floor nozzle 282 according to the invention, which is shown in a partial representation in FIGS. 17 and 18, is basically designed the same as the floor nozzle 212 and differs in the design of the strip element. A strip element 284 is provided instead of the strip element 266, which is spaced apart from the sliding plane 278. As a result, the channel 230 is open to the front side 268. An off If an underside 286 of the strip element 284 stood in relation to the sliding plane 278, an opening 288 from the front side 268 into the channel 230. This opening 288 is in particular slit-shaped. In particular, it extends essentially over the entire length of the channel 230 in the width direction 232.

The distance A of the underside 286 of the strip element 284 as the smallest from stood between the strip element 284 and the sliding plane 278 is greater than zero and in particular less than 6 mm.

Otherwise, the floor nozzle 282 functions like the floor nozzle 212.

A tenth embodiment of a floor nozzle 290 according to the invention (FIG. 19) is designed as a switchable floor nozzle for hard floors and textile floor coverings.

A first suction area and a second suction area, such as, for example, the floor nozzle 212, are formed on a nozzle body 292.

A rear bar element (not visible in FIG. 19) and a front bar element 294 are arranged on the nozzle body 292. The rear bar element and the front bar element 294 are in particular made of an elastic material. The web elements 294 extend essentially over the entire width of the floor nozzle 290. Furthermore, side skirts are arranged between the rear web element and the front web element 294.

The front web element 294 is provided with openings 296.

The front bar element 294 and the rear bar element are arranged on the nozzle body 292 in such a way that they can be extended for hard floor cleaning and can be retracted for textile floor cleaning. They form sliding elements for a hard floor. For textile floor cleaning, the nozzle body 292 is placed on the floor to be cleaned via a sliding plane 278, and web elements 52, 54 can optionally penetrate into the textile material.

The rear bar element and the front bar element 294 are extended for hard floor cleaning. In an extended state, the floor nozzle 282 (also) is supported on the floor to be cleaned via these web elements.

The second suction area 254 is not necessary for cleaning hard floors. In this case it makes sense to turn off the second partial flow 262. A switch 298 is provided for this purpose.

It can be provided that the switch 298 is coupled to a switch 300, via which a switchover between hard floor cleaning and textile floor cleaning is possible. By actuating the switch 300, the front bar element 294 and the rear bar element can essentially be moved and brought into their working position or non-working position.

It is provided in particular that when the switch 300 is actuated and the front bar element 294 and the corresponding rear bar element are brought into their working position, the switch 298 is actuated in such a way that the second partial flow 262 is blocked.

If the switch 300 is operated in such a way that the front bar element 294 and the rear bar element are brought into their non-working position, the switch 298 is accordingly operated so that the second partial flow 262 can flow again to the second suction area 254.

A floor nozzle according to the invention can be used in particular for a stand-alone device such as a vacuum cleaner or a wet mop device. In principle, it is also possible for a floor nozzle according to the invention to be integrated into a self-propelled and self-controlling cleaning device such as a robot vacuum cleaner.

One embodiment of a cleaning device according to the invention with a suction function is a self-propelled and self-steering suction device 302 in the form of a robot vacuum (FIGS. 20, 21). This cleaning device 302 has a housing body 304. This housing body 304 is supported on a wheel device 306 such that it can be moved on a floor to be cleaned. The cleaning device 302 is self-propelled and self-steering. It contains a corresponding control to be able to run a cleaning program independently.

According to the invention, a floor nozzle according to the invention such as the floor nozzle 10 (see above) is integrated into this cleaning device 302 and thereby into the housing body 304. This floor nozzle 10 in the cleaning device 302 is correspondingly connected to a suction unit 308, which sits on the housing body 304. Both fine dirt suction and coarse dirt suction can be achieved via the floor nozzle 10 of the cleaning device 302 and, in particular, also carried out for textile floors.

The floor nozzle 10 in the cleaning device 302 functions as described above.

Features of different embodiments that are described above can be combined, even if these feature combinations are not shown in the figures or are not explicitly described. In particular, as mentioned above, the first suction area and the at least one second suction area can be optimized separately in the embodiments. As a result, features that characterize the second suction area or are related to the second suction area can be combined with different configurations of first suction areas. For example, a guide device, as it is described in connection with the fifth embodiment (Figures 9, 10), can also be used for the ground nozzles of the sixth or seventh embodiment with brushes or rollers (Figures 11, 12) can be used.

The channels which were described in connection with the eighth and the ninth exemplary embodiment can also be used, for example, in the floor nozzles of the sixth and seventh exemplary embodiments.

List of reference symbols

Floor nozzle

Cleaning device

Suction unit

Suction flow

Nozzle body

Area

Support

connection

Suction pipe

bottom

ground

Slip plane

Roller device

First transverse page

Second transverse page

Width direction

Thrust direction

Rear

front

First extraction area

Extraction room

First bar element

Middle bar

Second bar element

Wall

First suction channel

First suction port

Second suction area

Flow divider device

First partial flow Second partial stream

Second suction channel

pipe

Top

Second suction port

Extraction room

opening

Guidance device

Funnel device

First wall

Second wall

acute angle

Strip element

bottom

counter

Floor nozzle (second embodiment) strip element

bottom

acute angle

Floor nozzle (third embodiment) nozzle body

First extraction area

Second suction area

Backward thrust direction

Forward direction of travel

Roller device

opening

Width direction

a role

b role

Guidance device

Floor nozzle (fourth embodiment) nozzle body First extraction area

Second suction area

Third extraction area

Floor nozzle (fifth embodiment) nozzle body

First extraction area

Second suction area

'' Second extraction area

Guidance device

First opening

Second opening

First transverse page

Second transverse page

First funnel device

Second funnel device

front

Support

Flow divider device

First suction channel

Second suction channel

Third suction channel

a suction flow

b First partial flow

c Second partial flow

d Third partial flow (further second partial flow) floor nozzle

Nozzle body

First extraction area

Extraction room

brush

Thrust direction

Second suction area

Floor nozzle (seventh embodiment) Nozzle body

First suction area receiving room

roller

Axis of rotation

Trim

a first part

b Part two

Suction mouth device First suction mouth

Another first suction mouth mouth wall

Thrust direction

Second suction area floor nozzle

Nozzle body

Support

Flow divider device First extraction area Extraction room

bottom

First suction channel

First suction port

Gutter

Width direction

First transverse page

Second transverse page

Second suction channel

Second suction port connection

End area

opening

Area pipe

Extraction room

Second suction area, thrust direction

Suction flow

First partial flow

Second partial stream

Cross flow

Strip element

front

opening

bottom

inclined plane

acute angle

opening

Slip plane

Coarse dirt particles

Area

Floor nozzle

Strip element

bottom

opening

Floor nozzle

Nozzle body

Front bar element

opening

counter

Cleaning device (vacuum robot) housing body

Wheel device

Suction unit

Claims

1. Floor nozzle for a cleaning device (12) with suction function, comprising a nozzle body (18; 108; 130; 140; 172; 186; 214; 292), a first suction area (48; 110; 132; 142; 174; 188; 220 ), which is arranged on the nozzle body (18; 108; 130; 140; 172; 186; 214; 292), at least one second suction area (62; 112; 134, 136; 144, 144 '; 182; 210; 254) for coarse dirt which is arranged on the nozzle body (18; 108; 130; 140; 172; 186; 214; 292) and which, based on a thrust direction (42) of the floor nozzle on a floor (30) to be cleaned, corresponds to the first suction area ( 48; 110; 132; 142;

174; 188; 220) is upstream, and a flow splitter device (64; 164; 218) which is arranged on the nozzle body (18; 108; 130; 140; 172; 186; 214; 292) and which has a suction flow (16) in at least one first partial flow (66; 260) for acting on the first suction area (48; 110; 132; 142; 174; 188; 220) and in at least one second partial flow (68; 262) for acting on the at least one second suction area (62; 112; 134, 136; 144, 144 '; 182;

210; 254) divides.

2. Floor nozzle according to claim 1, characterized in that the first suction area (48; 110; 132; 142; 174; 188; 220) and the at least one second suction area (62; 112; 134, 136; 144, 144 '; 182; 210; 254) are separated from one another in such a fluid-tight manner that, when the floor nozzle is operated properly, no significant suction of the first suction area (48; 110; 132; 142; 174; 188; 220) via the at least one second suction area (62; 112 ; 134, 136; 144,

144 ';182;210; 254) takes place, and that no significant suction of the at least one second suction area (62; 112; 134, 136; 144, 144 ';182;210; 254) via the first suction area (48; 110; 132; 142; 174; 188 ; 220) takes place.

3. Floor nozzle according to claim 1 or 2, characterized in that (i) a second suction area (62) for coarse dirt in a forward thrust direction (116) of the floor nozzle is upstream of the first suction area (48), or that (ii) a second suction area (112) for coarse dirt in a backward thrust direction (114) of the floor nozzle, which is opposite to the forward thrust direction (42), upstream of the first suction area (110), or that (iii) a second suction area (134) for coarse dirt in the forward thrust direction (116) is upstream of the first suction area (132), and that a third suction area (136) as a further second suction area for coarse dirt in the backward thrust direction (114) is upstream of the first suction area (132).

4. Floor nozzle according to one of the preceding claims, characterized in that the floor nozzle has a single connection (24) for a suction unit (14) which is fluidly connected to the flow divider device (64; 164; 218).

5. Floor nozzle according to one of the preceding claims, characterized in that the flow divider device (64; 164; 218) is arranged or formed on a connection piece (22; 216), a suction pipe (26) in particular on the connection piece (22; 216) ) or suction hose is closed or a connection (24) for a suction pipe (26) or a suction hose is arranged.

6. Floor nozzle according to claim 5, characterized in that a main channel (58; 226) of the nozzle (22; 216) is connected to the first suction area (48; 110; 132; 142; 174; 188; 220) in a fluid-effective manner.

7. Floor nozzle according to one of the preceding claims, characterized in that from the flow splitter device (64; 164; 218) at least one first suction channel (58; 226) to the first suction area (48; 110; 132; 142; 174; 188 ; 220) leads.

8. Floor nozzle according to claim 7, characterized in that the at least one first suction channel (58; 226) has at least one first suction opening (60; 228) which connects to the first suction area (48; 110; 132; 142; 174; 188 ; 220) is assigned.

9. Floor nozzle according to claim 8, characterized in that the min

at least one first suction opening (60; 228) opens into a suction space (50; 176; 222) of the first suction area (48; 110; 132; 142; 174; 188; 220).

10. Floor nozzle according to claim 9, characterized by at least one of the following: the suction space (50; 176; 228) of the first suction area (48; 110; 132; 142; 174; 188; 220) is to the bottom (94) of the nozzle body (18) open; the suction space (50; 228) of the first suction area (48; 110; 132; 142; 174; 188; 220) is an empty space or a brush (178) and in particular a rotatable brush roller (178) is arranged in the suction space (176) ; the suction space (50; 176; 228) of the first suction area (48; 110; 132; 142; 174; 188; 220) is through opposite

Bar elements (52, 54) which are arranged or formed on the nozzle body (18); the suction space (50; 176; 228) of the first suction area (48; 110; 132; 142; 174; 188; 220) is arranged and designed in such a way that the at least one first partial flow (66) of the suction flow (16) passes through the suction space ( 50; 176; 228) as a whole.

11. Floor nozzle according to claim 10, characterized in that the opposite web elements (52, 54) are designed as immersion elements in the textile material of a textile floor (30).

12. Floor nozzle according to claim 10 or 11, characterized by sliding

elements (294) and in particular elastic sliding elements for a hard floor (30).

13. Floor nozzle according to one of claims 9 to 12, characterized in that at least one roller (192) with textile trim (196) is arranged on the first suction area (188) and that the at least one first suction opening (202) is arranged and designed is that suction takes place from the at least one roller (192).

14. Floor nozzle according to claim 13, characterized in that the min least one first suction opening (202) is assigned an opening wall (206) which rests at least with a partial area on the textile trim (196) of the at least one roller (192) or in this is immersed.

15. Floor nozzle according to one of the preceding claims, characterized in that from the flow splitter device (64; 164; 218) at least one second suction channel (70; 166, 168; 238) to the at least one second suction area (62; 112; 134 , 136; 144, 144 '; 182; 210; 254).

16. Floor nozzle according to claim 15, characterized in that the at least one second suction channel (70; 166, 168; 238) from a socket (22; 216) to the at least one second suction area (62; 112; 134, 136; 144 , 144 ';182;210; 254).

17. Floor nozzle according to claim 15 or 16, characterized in that a length of the at least one second suction channel (70; 166, 168; 238) is at least 20 mm.

18. Floor nozzle according to one of claims 15 to 17, characterized

indicates that the at least one second suction channel (70; 166, 168;

238) has at least one second suction opening (76; 240) which is assigned to the at least one second suction area (62; 112; 134, 136; 144, 144 '; 182; 210; 254).

19. Floor nozzle according to claim 18, characterized in that the min least one second suction opening (76; 240) in a suction space (78; 252) of the at least one second suction area (62; 112; 134,

136; 144, 144 '; 182; 210; 254) opens.

20. Floor nozzle according to claim 19, characterized by at least one of the following: the suction space (78; 252) of the at least one second suction area (62; 112; 134, 136; 144, 144 ';182;210; 254) is one Underside (28) of the nozzle body (18; 108; 130; 140; 172; 186; 214; 292) open; the suction space (78; 252) of the at least one second suction area (62; 254) is open in the pushing direction (42); the suction space (252) of the at least one second suction area (254) is open on one side (234) of the nozzle body (214); a guide device (82) for coarse dirt is aligned with the at least one second suction opening (76).

21. Floor nozzle according to one of claims 18 to 20, characterized in that an effective cross-sectional area of the at least one second suction opening (76) is smaller than an effective cross-sectional area of a first suction opening (60) which is connected to the first suction area (48) assigned.

22. Floor nozzle according to one of claims 18 to 21, characterized

shows that an effective cross-sectional area of the at least one second suction opening (76) is in the range between 15 mm ² and 2400 mm ² .

23. Floor nozzle according to one of claims 19 to 22, characterized

shows that the suction space (252) of the at least one second suction area (254) is formed by at least one channel (230) which is arranged or formed on the nozzle body (214) and extends in a width direction (232) of the nozzle body (214) extends and in particular extends substantially over an entire width of the nozzle body (214).

24. Floor nozzle according to claim 23, characterized in that the min least one channel (230) is closed towards a transverse side (234) of the nozzle body (214) and is open towards an opposite transverse side (236) of the nozzle body (214).

25. Floor nozzle according to claim 23 or 24, characterized in that the at least one second suction opening (240) opens into the at least one channel (230) at an end region of the at least one channel (230).

26. Floor nozzle according to claim 25, characterized in that the end area (244) of the at least one channel (230) is adjacent to an area of the at least one channel (230) on which the at least one channel (230) to a transverse side of the nozzle body (214) is closed.

27. Floor nozzle according to one of claims 23 to 26, characterized

indicates that the at least one channel (230) is closed in the thrust direction, or that one or more openings (270) are arranged or formed on the nozzle body (214), by means of which the at least one channel (230) in the thrust direction ( 256) is open.

28. Floor nozzle according to one of claims 23 to 27, characterized

shows that a ratio of a length of the at least one second suction channel (238) to a length of the at least one channel (230) in the width direction (232) is in the range between 0.5 and 0.8.

29. Floor nozzle according to one of the preceding claims, characterized in that a guide device (82) for coarse dirt is arranged on the nozzle body (18), through which coarse dirt can be guided to the min least one second suction area (62).

30. Floor nozzle according to claim 29, characterized in that the guide device (82) comprises a funnel device (84).

31. Floor nozzle according to claim 30, characterized in that the

Funnel device (84) has at least one wall (86, 88) which is at an acute angle (90) to a width direction (40) of the nozzle body (18), in particular the width direction (40) perpendicular to the thrust direction (42 ) of the floor nozzle, and in particular the funnel device (84) has at least a first wall (86) and a second wall (88) which are directed towards at least one second suction opening (76) of the at least one second suction area (62).

32. Floor nozzle according to claim 31, characterized in that the acute angle (90) is at least 5 °.

33. Floor nozzle according to one of claims 29 to 32, characterized

shows that the funnel device (84) has an opening (80) which is located centrally between a first transverse side (36) of the nozzle body (18) and a second transverse side (38) of the nozzle body (18), where in particular a width direction (40 ) of the nozzle body (18) runs between the first transverse side (36) and the second transverse side (38), the funnel device (84) in particular having a wedge area.

34. Floor nozzle according to one of claims 30 to 33, characterized

shows that the funnel device (156; 158) has a plurality of openings (148, 150), in particular the funnel device (156; 158) having a plurality of wedge regions.

35. Floor nozzle according to one of the preceding claims, characterized in that a sliding plane (32) for a floor (30) to be cleaned is arranged or formed on the nozzle body (18).

36. Floor nozzle according to claim 35, characterized in that the at least one second suction area (62) is assigned a front bar element (92; 266; 284) with respect to the thrust direction (42) which has an underside (28; 272; 286) is aligned with respect to the sliding plane (32), or which is spaced from the sliding plane (32).

37. Floor nozzle according to claim 36, characterized in that an Ab

stood the underside (94; 272; 286) of the strip element (92; 266; 284) to the sliding plane (32) in the range between 0 mm and 6 mm.

38. Floor nozzle according to one of claims 36 to 37, characterized in that the strip element (92; 266; 284) is provided with an inclined plane (274) in relation to the sliding plane (32), in particular an angle (104; 276 ) the inclined plane (274) is at least 2 ° to the sliding plane (32).

39. Floor nozzle according to one of claims 36 to 38, characterized in that the front bar element (92; 266; 284) is part of a guide device (82) for coarse dirt and / or a wall of the at least one second suction area (62; 254) is.

40. Floor nozzle according to one of the preceding claims, characterized in that, when the floor nozzle is in operation, simultaneous suction on the first suction area (48; 110; 132; 142; 174; 188; 220) and on the at least one second suction area (62; 112; 134, 136; 144, 144 '; 182; 210; 254).

41. Floor nozzle according to one of the preceding claims, characterized in that a switch (96) is assigned to the at least one second suction area (62), through which the application of the at least one second partial flow (68) can be switched.

42. Cleaning device with suction function, on which a floor nozzle according to one of the preceding claims is arranged.

43. A method for vacuuming a floor area with a floor nozzle, in particular with a floor nozzle according to one of claims 1 to 41, in which a first extraction area (48; 110; 132; 142; 174; 188; 220) with at least one first partial flow ( 66) of a suction flow (16) is applied, and in which at least one second suction area (62; 112; 134, 136; 144, 144 '; 182; 210; 254) for coarse dirt with at least a second partial flow (68) of the suction flow (16), the at least one second suction area (62; 112; 134, 136; 144, 144 '; 182; 210; 254) being the first suction area (48; 110; 132; 142; 174; 188; 220 ) is upstream of the floor nozzle in a thrust direction (42), and wherein the at least one first partial flow (66) and the at least one second partial flow (68) are generated at the floor nozzle by dividing the flow from the suction flow (16).

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