EP3634193A1 - Floor nozzle device, cleaning roller for textile surface cleaning and suction machine - Google Patents

Abstract

The invention relates to a floor nozzle device having a textile surface cleaning function, comprising a floor body (14) and a sliding bottom plate (41; 177; 202; 206; 248) that comes into contact with a surface (30) being cleaned when said floor nozzle device (11; 11'; 11''; 11'''; 111; 111'; 111''; 244) is in operation, said sliding bottom plate (41; 177; 202; 206; 248) consisting of a composite material which comprises a matrix material made of at least one polymer, and fibres consisting of an electrically conductive material and/or lamellae consisting of an electrically conductive material as a filler.

Description

 Floor nozzle device, cleaning roller for one

 Textile Surface Cleaning and Suction Machine The present invention relates to a floor nozzle device having a textile surface cleaning function. The floor nozzle device comprises a bottom body and a sliding sole, which is in contact with a surface to be cleaned during operation of the floor nozzle device. Floor nozzle devices which have a textile surface cleaning function are used in particular in the cleaning of soiled and / or dusty textile surfaces, such as, for example, carpets, carpets and / or felt floors. During cleaning, the floor nozzle device is movable over the surface to be cleaned, in particular slidable. Dust and / or other dirt particles are absorbed by the floor nozzle device in an air stream and sucked.

The invention further relates to a cleaning roller for a textile surface cleaning.

In addition to or as an alternative to floor nozzle devices, cleaning rollers are used in the cleaning of textile surfaces and / or hard surfaces, which preferably form part of a suction machine. In an operating mode, cleaning rollers are preferably moved in a rotating movement about a rotation axis, wherein the rotation axis is arranged perpendicular or oblique to a main movement direction of the suction machine.

Furthermore, the invention relates to a suction machine. From WO 2012/175932 Al and GB 2 499 542 A a cleaning head for a surface treatment device is known, comprising a

Body having a suction opening. A stream of air flows through the suction opening into the cleaning head. The body has at least one part, which engages the ground and which is made of a material comprising a dispersion of carbon nanotubes in a polymer matrix. Furthermore, bristles for a brush which are made of a composite material comprising a dispersion of carbon nanotubes in a polymer matrix are known from the cited references.

Bristles or filaments for vacuum cleaner brushes made of carbon fibers or carbon fiber materials are known from the

US 2010/0306956 AI, WO 2010/142968 AI and US 2013/0086769 AI known.

Extension tubes or components of extension tubes for vacuum cleaners of a carbon fiber-containing resin are known from

JP 2012-192007 A and JP 2012-249699 A known.

Vacuum cleaner nozzles made of carbon fibers, aramid resin fibers, epoxy resin fibers and their mixtures as a substitute for a plastic material are known from WO 2005/035878 AI. From US 2003/0014832 Al vacuum cleaners are made of a non-electrically conductive material, such as polymers or graphite-based compositions known.

Vacuum cleaners, in which the dust pickup is supported by means of electrostatic charge of a base plate by a separate generator, are known from US 6,199,244 Bl.

From US 2007/0136976 AI a work apparatus is known, the return carrier comprises a carbon fiber-containing region through which an electrically conductive connection between the work apparatus and an operator of the work apparatus is established during operation. A sheet-metal sliding sole for a vacuum cleaner nozzle is known from EP 1 964 501 A2.

JP 11346967 A discloses the use of metallic fibers at the bottom of suction device bodies.

The invention has for its object to provide a floor nozzle device of the type mentioned, which has a high suction effect with ease of use for textile surfaces and causes low electrostatic charging phenomena.

This object is achieved by a floor nozzle device of the type mentioned, in which a sliding sole is provided, which is made of a composite material comprising a matrix material of at least one polymer and fibers of an electrically conductive

 Material and / or platelets of an electrically conductive material as a filler comprises.

For aspiration of dust particles and the like by means of the floor nozzle device, a targeted targeted air flow must be able to flow. When cleaning a textile surface with a floor nozzle device, there is a contact between the sliding sole and the textile material of the textile surface. This can lead to contact electricity and electrostatic charging phenomena. This can lead to a deflection of the electrostatic dust particles and as a result to a reduced suction effect.

In the solution according to the invention, the sliding sole is made of a composite material which comprises a matrix material of at least one

Polymer and fibers of an electrically conductive material and / or

Comprising platelets of an electrically conductive material as filler. By introducing an electrically conductive filler in the form of fibers and / or platelets, a contact electricity can be reduced or completely prevented.

In particular, an antistatic floor nozzle device is provided.

Due to the reduced charge can be achieved with comparable suction performance improved suction.

For the purposes of the invention, the electrical conductivity is characterized by the specific resistance. The resistivity is the reciprocal of the electrical conductivity of a material.

Preferably, the filler of the composite material has a resistivity of about 100 Q-mm ² / m or less, preferably about

50 Q-mm ² / m or less, more preferably about 20 Q-mm ² / m or less. The resistivities each refer to a material temperature of 20 ° C to 25 ° C.

Preferably, electrical conductivity is understood to be a metallic electrical conductivity.

By reducing electrostatic charging phenomena, electric discharges to a user of the floor nozzle device can be avoided. The user-friendliness of the floor nozzle device is improved by the drastically reduced risk that the user will receive an "electrical shock" when the load is equalized when the floor nozzle device is touched.

Furthermore, the sliding sole made of the composite material by the filler in the form of fibers made of an electrically conductive material and / or platelets of an electrically conductive material has an increased stability. The floor nozzle device with the sliding sole of the composite material has preferably an increased mechanical stiffness in comparison to floor nozzle devices with sliding soles without the filler according to the invention.

In addition, the life of floor nozzle devices according to the invention may be increased since, compared to floor nozzle devices without sliding soles according to the invention, the time until wear phenomena occur on the sliding sole is prolonged.

Furthermore, abrasion on the sliding sole can be reduced by the filler.

Because the sliding sole is produced from the composite material according to the invention, interactions between the soleplate according to the invention and the textile surface can be optimized in such a way that the slidability of the floor nozzle device according to the invention is improved. This is in particular given by the fact that the soleplate and the textile surface, for example carpet, carpet or felt, have comparable or identical surface properties and / or comprise similar materials. Due to the filler of the sliding sole materials can be selected as matrix material, which are less suitable as a material for a floor nozzle device without filler.

For example, polyvinyl chloride (PVC), which usually electrostatically charges as the material in a bottom jet device without the filler according to the invention, can be used as matrix material for the composite material of the sliding sole.

In addition, due to the improved mechanical rigidity due to the filler, for example, polyamides whose mechanical properties without filler as material for a floor nozzle device are not are sufficient, as a matrix material for the composite material of the sole plate suitable.

By virtue of the fact that a large number of polymers are accessible to processing in the bottom nozzle device due to the use of the filler according to the invention, it is possible to resort to existing production methods and / or production devices, such as production forms, in order to manufacture the sliding sole and / or the bottom nozzle device. This saves acquisition costs, whereby the floor nozzle device can be produced overall at a reduced cost.

Due to the material selection according to the invention for the composite material, the floor nozzle device according to the invention in particular has an optimized lubricity, whereby the user-friendliness is optimized.

It may be advantageous if the fibers of an electrically conductive material and / or the platelets of an electrically conductive material are embedded as a filler in the matrix material. The individual fibers of an electrically conductive material and / or

Platelets of an electrically conductive material are in particular completely or partially enclosed by the at least one polymer of the matrix material. In particular, it is provided that there is statistically distributed to a direct material contact of individual fibers of an electrically conductive material and / or platelets of an electrically conductive material. Thus, on the one hand, a stabilizing structure can be formed from the filler and, on the other hand, any contact electricity which may be produced via contact points of adjacent filler particles can be directly dissipated. In particular, the fibers of an electrically conductive material in the sliding sole on a preferred direction.

Main extension planes of the platelets made of an electrically conductive material are aligned in a preferred embodiment substantially parallel to each other in the matrix material. For example, the main planes of extension of the platelets of an electrically conductive material are arranged substantially parallel to an outer surface of a lower side of the sliding sole.

Preferably, the filler is at least approximately homogeneously distributed in the matrix material. This can offer the advantage that charging phenomena can be avoided or reduced over the entire area of the sliding sole.

It can be provided that the bottom nozzle device or its bottom body is made entirely of the composite material which comprises fibers of an electrically conductive material and / or platelets of an electrically conductive material as filler.

It is favorable if the composite material has a specific surface resistance of about 25 Ω or more, in particular about 250 Ω or more. In particular, the composite material has a surface resistivity of about 1-10 ⁸ Ω or less, for example, about 1-10 ⁷ Ω or less.

It is advantageous if the fibers of an electrically conductive material are carbon-based fibers, in particular carbon fibers. Additionally or alternatively, the platelets of an electrically conductive material are carbon-based platelets, in particular carbon platelets.

It has proved to be favorable if the composite material comprises the fibers of an electrically conductive material and / or the platelets of an electrically conductive material as filler in a proportion of about 5% by weight or more, preferably of about 10% by weight or more , in particular of about 15% by weight or more. These proportions may be sufficient to sufficiently reduce electrostatic charging effects and to increase the stability of the components as compared to components made of a material without the fillers of the invention.

The weight% are each based on the total mass of the composite material. Furthermore, it has proved to be advantageous if the composite material, the fibers of an electrically conductive material and / or the platelets of an electrically conductive material as a filler in a proportion of about 50 wt.% Or less, preferably from about 40 wt.% Or less, in particular of about 30% by weight or less. With these shares that is

Composite material still liquefies and has sufficient good flow properties, so that it can be processed in a polymer forming process.

Preferably, the composite material can be processed in a forming process. In particular, the composite material is injection-moldable, extrudable, calendered, rotationally deformable, foamable and / or spray-blowable.

The bottom nozzle device and / or the sliding sole can be produced in particular in an injection molding process, an extrusion process, a calendering process, a rotational molding process, a foaming process and / or an injection blow molding process. The composite material according to the invention is on the one hand slidable, so that the operability of the floor nozzle device is facilitated in comparison to less slidable components and it must be pushed with relatively little effort over a surface to be cleaned. On the other hand, electrostatic charging effects can be drastically reduced. In addition, components of the composite material according to the invention have an optimized wear resistance.

For the purposes of the invention, a "fiber" is to be understood as an essentially rod-shaped object elongated in one dimension. A fiber preferably has a greater extent in one dimension than in the other dimensions. Fibers also include objects that are curved or have defects or dents. In particular, fibers have a length to width ratio of 3 or more.

For the purposes of the invention, a "plate" is to be understood as meaning a flat, elongated object which has a significantly smaller dimension in one dimension than in the other two dimensions. The term platelet includes in particular also arched objects and / or objects with recesses. The term platelet in the context of the invention also includes "flakes" and / or "flakes".

The fibers of an electrically conductive material preferably have an average length of about 80 pm or more, preferably of about 100 pm or more, in particular of about 500 pm or more.

The platelets of an electrically conductive material preferably have an average diameter of about 80 pm or more, preferably about 100 pm or more, in particular of about 500 pm or more.

The diameter of the platelets of an electrically conductive material corresponds in particular to the largest width of a platelet. It is favorable if the composite material comprises fibers and / or platelets of a solid material. Preferably, the fibers of an electrically conductive material have an average length of about 4 mm or less, preferably about 3 mm or less, in particular about 2 mm or less.

The platelets of an electrically conductive material preferably have an average diameter of approximately 4 mm or less, preferably approximately 3 mm or less, in particular approximately 2 mm or less.

On the one hand, the platelets of an electrically conductive material with the aforementioned dimensions are large enough to increase the stability of the component or of the component and to reduce contact electricity, and on the other hand, the platelets can be made of an electrically conductive material having the stated dimensions the preparation to be introduced into the matrix material, such that the composite material is granulated in the preparation.

The fibers made of an electrically conductive material preferably have a diameter D ₉₀ of 0.5 mm. In this case, D ₉₀ means in particular that 90% of the fibers have a diameter of 0.5 mm or less. The diameter is measured in particular transversely to the length of the fibers.

The platelets of an electrically conductive material preferably have a diameter D ₉₀ of 3 mm. D _90, especially means that 90% of the platelets have a diameter of 3 mm or less. For example, the filler can also be integrated into a granulation process by injection molding even with a maximum length / a maximum diameter. The mean length and / or the mean diameter is indicated in particular as an arithmetic mean. Alternatively, it can also be provided that the mean length and / or the mean diameter are related to the median of the length distribution or diameter distribution.

For example, graphite fibers, graphite platelets, carbon flakes and / or aluminum flakes are used as filler. It is particularly preferred if the matrix material comprises or is formed from one or more of the following polymers: polyamide (PA), in particular polyamide 6 (PA6) or polyamide 66 (PA66), polycarbonate (PC), acrylonitrile (AC), Butadiene, styrene, in particular acrylonitrile-butadiene copolymer (ABS), polyolefin, in particular polypropylene (PP), polyketone, polymethyl methacrylate (PMMA), polyvinyl chloride (PVC).

Embodiments of the floor nozzle device according to the invention in which the sliding sole is made of a composite material which comprises polyamide 6 and / or nylon 66 as matrix material and carbon fibers as filler in a proportion of 5% by weight to 15% by weight, preferably 10% by weight, are particularly preferred. %, includes.

Preferably, the floor nozzle device comprises a suction mouth, which is arranged on the sliding sole and / or is formed by the sliding sole.

It is advantageous if the sliding sole forms a contact surface to the surface to be cleaned and / or is arranged on an underside of the bottom body or forms the underside of the bottom body.

The sliding sole is formed in the operation of the bottom nozzle device in particular substantially parallel to an envelope plane of the surface to be cleaned. It is advantageous if the sliding sole during operation of the floor nozzle device forms or comprises a contact surface on which the floor nozzle device is in material contact with the surface to be cleaned.

Preferably, the sliding sole comprises an upper portion and a lower portion, the lower portion following the upper portion and a contact surface following the lower portion and / or formed by the lower portion.

It may be favorable if the fibers are made of an electrically conductive

Material and / or the platelets of an electrically conductive material as filler have a higher concentration in the lower region and a lower concentration in the upper region of the sliding sole.

In a particularly preferred embodiment, the suction mouth has a first boundary wall with a first suction edge and a first boundary wall spaced second boundary wall with a second suction edge. The first and the second suction edge are provided for immersion in textile material of a textile surface. The first boundary wall has a first inner side and a first outer side, and the second boundary wall has a second inner side and a second outer side. The first inner side faces the second inner side, and a suction opening is formed between the first inner side and the second inner side.

Preferably, the floor nozzle device comprises a suction head, which is arranged on the bottom body. There is at least one in the suction head

Flow path is formed, can be fed through the air from an environment of the bottom nozzle device through the suction head of the first suction edge on the first outer side and / or the second suction edge on the second outer side. The first suction edge and / or the second suction edge form in particular components of the sliding sole.

The first suction edge and / or the second suction edge have, in particular towards the underside, a sharp-edged to slightly rounded end with a radius of 2 mm or less.

In one embodiment, the at least one flow path has at least one outlet, which is arranged on the suction head and is associated with the respective suction edge, which is the first suction edge or the second suction edge. It can thereby produce an increased volume flow in the region of the first suction edge and / or the second suction edge, which causes an improved suction and a facilitated pushability of the floor nozzle.

It is advantageous if the at least one outlet is oriented along the respective suction edge and in particular has a longitudinal extension direction which is parallel to a longitudinal direction of extension of the respective suction edge. As a result, a bypass current can be selectively supplied to the respective suction edge.

For the same reason, it is favorable if the at least one

Flow path comprises at least one opening in the suction head, which is associated with the first suction edge and / or comprises at least one opening in the suction head, which is associated with the second suction edge.

It is particularly favorable when a first bottom wall, which is connected to the first boundary wall, has a first region, which is designed as Auffahrschräge and / or the second boundary wall has a second region, which is designed as Auffahrschräge, in particular the first region adjoins the first suction edge and / or the second region adjoins the second suction edge. It can thereby achieve an optimized suction. In particular, this can be achieved in a simple manner that the first suction edge and the second suction edge can penetrate into the textile material of the textile surfaces. In the embodiment as Auffahrschräge is in particular the first region or the second region to an envelope plane of the first suction edge and the second suction edge at a small acute angle, said acute angle is in particular in the range between about 5 ° and about 15 °. It is also advantageous if a thread lifter is arranged on the first bottom wall and / or a second bottom wall, which is connected to the second boundary wall. This results in an optimized suction result.

In particular, the first bottom wall and the second bottom wall provide

Boundary surfaces of the suction head down to the surface to be cleaned ready.

It may be favorable if the first boundary wall, the second boundary wall, the first bottom wall and / or the second bottom wall form constituents of the sliding sole according to the invention.

It is favorable if the at least one opening, which is assigned to the first suction edge, and / or the at least one opening, which is assigned to the second suction edge, has a spacing (relative to an edge, which faces the nearest suction edge) in a spacing direction between the first suction edge and the second suction edge to the associated suction edge, which is in the range between 0.5 mm and 2.5 mm. It has been found that this allows an optimized bypass air supply to the respective suction edge can be achieved and thus results in an improved suction with ease of use, especially for textile surfaces with dense textile material results. The first suction edge and / or the second suction edge preferably form part of a suction channel, via which dust or the like is sucked off in an air flow. The suction channel is seen from below formed substantially rectangular. In particular, the suction channel has a curved shape relative to a lateral cross section.

It is favorable if a width of the suction channel transversely to a sliding direction of the floor nozzle device increases from a coupling point to a suction unit towards the textile surface by a factor of 2 or more.

It is particularly favorable if an air supply via the at least one flow path in the suction head to the first suction edge and / or the second suction edge is adjustable by means of an adjusting device.

It can be provided that the adjusting device is designed so that an air supply through the at least one flow path to the first suction edge and / or the second suction edge can be blocked. It is also advantageous if the floor nozzle device comprises a switching device for switching from the textile surface cleaning function to a hard surface cleaning function.

In embodiments in which at least one flow path is formed in the suction head through which air can be supplied from an environment of the floor nozzle device through the suction head to the first suction edge on the first outer side and / or the second suction edge on the second outer side Switching device coupled in particular to the adjusting device, wherein in particular when switching to the hard surface cleaning function, the at least one flow path with respect to the air supply to the first suction edge and / or the second suction edge is automatically blocked. The floor nozzle device preferably comprises a manifold, which is arranged in a region facing away from the suction head. The manifold forms in particular a connection point for a connecting element to a suction unit of a vacuum cleaner.

About the manifold is preferably derived via the bottom nozzle device extracted dust in the suction air stream.

The manifold preferably forms a region of a change in the direction of the air flow, in which conventional manifolds can lead to charging effects, which are caused by an interaction of the electrostatic dust and the material of the manifold.

These charging effects are reduced when the manifold is made of the composite material according to the invention. One or more of the features and advantages mentioned in connection with the composite material of the soleplate of the floor nozzle device apply equally to the elbow made from the composite material according to the invention. It is advantageous if the manifold comprises a first at least approximately hohizylindrischförmigen section and a second at least approximately hohizylinderförmigen section whose longitudinal central axes are arranged at an obtuse angle to each other. The obtuse angle is in particular in a range of about 100 ° to about 170 °, preferably about 110 ° to about 160 °. It has also proven to be advantageous if the first portion and the second portion of the manifold are connected together in a hinge.

It may be particularly advantageous when the first portion of the manifold is pivotally connected about a pivot axis with the bottom body and / or the second portion of the manifold is disposed away from the bottom body.

The pivot axis is preferably arranged perpendicular to the shear force direction and perpendicular to a main movement direction of the floor nozzle device.

Preferably, the manifold has at the second portion a pivot for connection to a suction pipe. The manifold is in particular rotatably connectable to the suction tube at an end remote from the first section. The suction tube is rotatable by means of the rotary joint, in particular about an axis of rotation, which runs parallel to a longitudinal central axis of the second portion of the elbow. It is advantageous if the suction head is arranged pivotably on the bottom body. It can be achieved in that the first suction edge or the second suction edge, depending on the thrust direction of the floor nozzle device, deeper immersed in the textile material of the textile surface, so as to achieve an improved suction. A pivoting of the suction head is preferably limited by stops which are arranged on a side facing away from the suction end of the bottom body.

It is also advantageous if at least one support wheel is arranged on the bottom body. This results in a simple operability with respect to displacement of the floor nozzle on a surface to be cleaned. According to a preferred embodiment, the floor nozzle device is a floor nozzle.

Preferably, the floor nozzle with respect to the direction of gravity seen from below has a width which is at least 1.5 times as wide as a length of the floor nozzle. The width of the floor nozzle is in particular an average width transverse to the main direction of movement of the floor nozzle. The length is in particular an average length parallel to the main direction of movement of the floor nozzle.

The main direction of movement of the floor nozzle or the floor nozzle device corresponds in particular to a sliding direction of the floor nozzle or the floor nozzle device. According to the invention, a cleaning roller for a textile surface

Cleaning provided, wherein the cleaning roller comprises a plurality of bristles and a bristle receptacle for receiving bristles and wherein the plurality of bristles, in particular in bundles, are held in the bristle receiving, wherein the bristle holder and / or the plurality of bristles of a

Composite material is made, which comprises a matrix material of at least one polymer and fibers of an electrically conductive material and / or platelets of an electrically conductive material as a filler.

The composite material according to the invention from which the bristle holder and / or the plurality of bristles of the cleaning roller are made has the features and advantages mentioned in connection with the composite material of the sliding sole of the floor nozzle device.

Preferably, the cleaning roller comprises a base body which is at least approximately cylindrical in shape and on the lateral surface of which the bristle holder is arranged. The several bristles in particular extend at least approximately radially away from a longitudinal center axis of the cleaning roller.

The cleaning roller is in a mounted state to a suction machine in particular rotatably movable. The bristles are provided in particular for immersing and / or combing through textile material of the textile surface to be cleaned.

It is favorable if the cleaning roller comprises about five bristles or more, in particular about 100 bristles or more, for example about 500 bristles or more.

Preferably, the cleaning roller comprises about 100,000 bristles or less, more preferably about 50,000 or less, for example, about

1,000 bristles or less.

It can be provided that a cleaning roller according to the invention comprises both bristles of the composite material according to the invention and bristles of other materials.

Alternatively, all bristles of the cleaning roller are made of the composite material according to the invention.

According to the invention, a suction machine is also provided, comprising a floor nozzle device according to the invention and / or a cleaning roller according to the invention.

It may be favorable if the suction machine is designed as a vacuum cleaner. According to a preferred embodiment, the suction machine is designed as a self-propelled and self-steering vacuum robot. According to a further preferred embodiment, the suction machine is designed as a sweeper.

The following description of preferred embodiments is used in conjunction with the drawings for further explanation of the invention. Show it :

Figure 1 is a schematic partial side sectional view of a Ausfüh

 For example, a floor nozzle device according to the invention in a textile surface cleaning function;

Figure 2 is the same view as Figure 1, wherein in comparison to Figure 1, another position of an adjusting device is shown; FIG. 3 shows a variant of the floor nozzle device according to FIG. 1 with an alternative embodiment of an adjusting device;

Figure 4 is a view of a suction head of the floor nozzle device according to

 Figure 1 from below;

Figure 5 is a bottom view of another embodiment of a

 suction head;

Figure 6 is a bottom view of another embodiment of a

 suction head;

FIG. 7 shows the floor nozzle device according to FIG. 1 in a hard surface cleaning function; FIG. 8 shows a further embodiment of a floor nozzle device in a hard surface cleaning function; a further embodiment of a floor nozzle device in a textile surface cleaning function; the floor nozzle device according to FIG. 9 in a hard surface cleaning function; a bottom view of a suction head of the bottom nozzle device according to Figure 9; a sectional view of a suction channel of the bottom nozzle device according to Figure 9 taken along a plane which is perpendicular to a direction of a forward thrust and perpendicular to an envelope plane of a surface to be cleaned; a further embodiment of a floor nozzle device in a textile surface cleaning function; a schematic perspective view of a cleaning roller according to the invention; a schematic view of a suction machine according to the invention in the form of a vacuum robot from below; a diagram of measurement results for investigations of the electrostatic charging of weighted test bars made of different materials; and

FIG. 17 shows a further diagram of measurement results for investigations of the sliding force with comparable dust absorption of floor nozzles made of different materials. A first exemplary embodiment of a floor nozzle device according to the invention, which is shown schematically in FIGS. 1 and 2 and denoted there by 11, is provided for connection to a vacuum cleaner with a suction unit 12. The floor nozzle device 11 is in the present case designed as a floor nozzle 10. The floor nozzle 10 is designed in particular for connection to a suction pipe or a suction hose of the vacuum cleaner.

The floor nozzle 10 has a bottom body 14. On the bottom body 14, a connection 16 is arranged, via which the floor nozzle 10 can be connected to the vacuum cleaner in order, in particular, to establish a fluid-effective connection with the suction unit 12.

In one embodiment, the port 16 includes a pipe stub

18, in which a tube of the vacuum cleaner is inserted.

It can be provided that at the connection 16 of the pipe socket 18 is rotatable about a hinge 20 about a rotation axis 22.

In one embodiment, the bottom body 14 has a first part 24 and a second part 26. At least one support wheel 28 and in particular a pair of support wheels 28 are arranged on the bottom body 14, via which the floor nozzle 10 can be supported on a surface 30 to be cleaned. The at least one support wheel 28 may be arranged on the first part 24, the second part 26 or on both parts 24, 26.

The support wheel or wheels 28 are in particular rotatable about a rotation axis 32.

The first part 24 is pivotally mounted on the second part 26 via a hinge 34. At the second part 26 of the terminal sits 16.

The second part 26 and the port 16 preferably form a manifold

19. The second part 26 forms in particular a first section of the The manifold 16 in particular forms a second section of the manifold 19.

A corresponding pivot axis 36 is in particular parallel to the axis of rotation 32.

In one embodiment, the hinge 34 is arranged so that the pivot axis 36 coincides with the axis of rotation 32 or lies in the vicinity of this axis of rotation 32.

About the joint 34 can be different heights compensate;

different holding heights correspond in particular to different angles, with which a suction pipe arranged on the connection 16 is positioned to the surface 30 to be cleaned. The joint 34 just allows just such different heights.

On the bottom body 14, a suction head 38 is arranged. The suction head 38 provides support for the floor nozzle 10 at a distance from the support wheel (s) 28 and effects suction flow of the surface 30 to be cleaned.

The suction head 38 is arranged on the first part 24 of the bottom body 14. In one embodiment, the suction head 38 is mounted via a pivot joint 40 on the first part 24 of the bottom body 14. The pivot joint 40 defines a pivot axis 42 which is parallel to the axis of rotation 32 and the pivot axis 36, respectively.

One with respect to the direction of gravity underside 39 of the suction head comprises a sliding sole 41. According to the invention, the sliding sole 41 is made of a composite material. The composite material comprises at least one polymer as the matrix material and fibers of an electrically conductive material and / or platelets of an electrically conductive material as a filler. In particular, the composite material comprises at least one polymer and carbon-based fibers, for example carbon fibers as filler. Additionally or alternatively, the composite comprises in particular carbon-based platelets, for example carbon platelets as filler.

The composite material is preferably an injection moldable material.

For example, the composite material comprises the fibers of an electrically conductive material and / or the platelets of an electrically conductive material in a proportion of 10 to 20 wt.% Based on the total mass of the composite material.

In one embodiment, the at least one polymer of the matrix material comprises or is formed from one or more of the following polymers: polyamide (PA), in particular polyamide 6 (PA6) or polyamide 66 (PA66), polycarbonate (PC), acrylonitrile (AC), butadiene , Styrene, in particular acrylonitrile-butadiene copolymer (ABS), polyolefin, in particular polypropylene (PP), polyketone, polymethyl methacrylate (PMMA), polyvinyl chloride (PVC).

For example, polyamide 6 or polyamide 66 forms the matrix material.

Preferably, the fibers of an electrically conductive material and / or platelets of an electrically conductive material have an average length / diameter of about 100 pm to about 3 mm.

In particular, the composite material has a surface resistivity of approximately 250 Ω to approximately 1-10 ⁷ Ω. The filler in particular has a specific resistance of

50 Qmm ² / m or less. For example, carbon fibers with a resistance of 16 Qmm ² / m form the filler. It can be provided that the manifold 19 from the previously

made composite material is manufactured.

The suction head 38 is mounted in the manner of a rocker on the bottom body 14. This makes possible an improved cleaning result, in particular in a textile surface cleaning function, in that a front suction edge (first suction edge 74, see below) moves deeper into textile material during a forward thrust 44 of the floor nozzle 10 over the surface 30 to be cleaned in comparison to a rear suction edge can penetrate to be cleaned surface 30, and at a backward thrust the rear suction edge (second suction edge 76, see below) can penetrate deeper into the textile material than the front suction edge.

The forward thrust 44 preferably corresponds to a main direction of movement of the floor nozzle 10. The first suction edge 74 and the second suction edge 76 are part of the sliding sole 41 and made of the composite material according to the invention.

At the suction head 38, a suction mouth 48 is arranged. The suction mouth 48 comprises a first boundary wall 50 and a second boundary wall 52 opposite the first boundary wall (see also FIG. 4).

Positioned transversely to the first boundary wall 50 and the second boundary wall 52 is a ceiling wall 54 which is connected to the first boundary wall 50 and the second boundary wall 52. The top wall 54 closes the suction mouth 48 upwards away from the surface 30 to be cleaned, when the floor nozzle 10 over the or Support wheels 28 and the suction head 38 is supported on the surface 30 to be cleaned.

In the top wall 54, an opening 56 is formed. At least one channel 58, which runs through the suction head 38 and the bottom body 14 to the connection 16, is connected to this opening 56. Between the first boundary wall 50, the second boundary wall 52 and the top wall 54, a suction chamber 60 is formed. Via the channel 58 of the suction chamber 60 is fluidly connected to the suction unit 12, so that at a corresponding negative pressure by the suction unit 12 in the suction chamber 60 may act a suction flow.

The first boundary wall 50 has a first inner side 62 a, which limits the suction chamber 60. It has a first outer side 62b, which faces away from the first inner side 62a. The second boundary wall 52 has a second inner side 64a, which delimits the suction chamber 60 and faces the first inner side 62a. The second boundary wall 52 also has a second outer side 64b, which faces away from the second inner side 64a.

The suction chamber 60 is laterally closed by opposite side walls 66, 68, which are connected to both the first boundary wall 50 and the second boundary wall 52. Between the first boundary wall 50, the second boundary wall 52 and the side walls 66, 68, a suction opening 70 of the suction mouth 48 is formed. Through the suction opening 70, the suction chamber 60 is open to the surface to be cleaned 30 (when the floor nozzle 10 is positioned on the operative surface 30 to be cleaned). Via the suction opening 70, the surface 30 to be cleaned can be subjected to a suction flow and thus suctioned off. The suction mouth 48 forms a suction channel via the suction chamber 60 and the suction opening 70, which is open to the surface 30 to be cleaned. In the textile surface cleaning function, the floor nozzle 10 is provided for the extraction of textile surfaces 72 as surfaces 30 to be cleaned. Such a textile surface 72 is made of textile material. The corresponding textile surface 72 is for example a carpet or a carpet.

At the first boundary wall 50, a first suction edge 74 is formed on the front side in the region of the suction opening 70. At the second boundary wall 52, a second suction edge 76 is formed on the front side in the region of the suction opening 70.

The first suction edge 74 and the second suction edge 76 are formed for example by a correspondingly thin design of the first boundary wall 50 and the second boundary wall 52 at their respective end face.

In one exemplary embodiment, provision is made for the first boundary wall 50 or the second boundary wall 52 to be wedge-shaped on the end face in order to form the respective suction edge 74 or 76.

The first boundary wall 50 has a greater distance from the connection 16 or the support wheel 28 than the second boundary wall 52. In particular, the pivotable mounting of the suction head 38 on the bottom body 14 ensures that during a forward stroke 44, the first suction edge 74 Accordingly, the suction head 38 is formed and mounted so that in a backward stroke 46, the second suction edge 76 penetrates deeper into the textile material of the textile surface 72 as the first suction edge 74. The first suction edge 74th and the second suction edge 76 are formed so that in the textile surface cleaning function they are in an operative position and immerse in the textile material of the textile surface 72 or can penetrate. As a result, dust can be effectively removed from the textile material of the textile surface 72.

In a wedge-shaped embodiment of the first suction edge 74 and the second suction edge 76, in particular, a wedge surface for the first suction edge 74 is oriented such that it lies between the first inner side 62a and the first outer side 62b and thereby from the first inner side 62a to the first outer side 62b recedes. A corresponding wedge surface on the second suction edge 76 is then in particular formed such that it lies between the second inner side 64a and the second outer side 64b and recedes toward the second outer side 64b.

At the end, the suction head 38 has a first bottom wall 78 opposite a surface 30 to be cleaned. This first bottom wall 78 is connected to the first boundary wall 50. It adjoins directly to this and is oriented transversely to the first boundary wall 50.

The first bottom wall 78 leads from the first boundary wall 50 in a direction to a front end 80 of the suction head 38. The suction head 38 also has a rear end 82 facing away from the front

End is. The rear end 82 is closer to the support wheel 28 and to the terminal 16 than the front end 80th

The first bottom wall 78 has a first portion 84 oriented at a (small) acute angle 86 to an envelope 88 to the first suction edge 74 and the second suction edge 76. The acute angle 86 is oriented so that the first bottom wall 78 recedes in the first region 84 with respect to the envelope 88 in the direction of the front end 80 back. Alternatively it can be provided that a transition region 77 between the first suction edge 74 and the first region 84 is arranged. A main extension plane of the transition region 77 preferably includes a at least approximately right angle with a main extension plane of the first boundary wall 50 and / or the first inner side 62 a.

In particular, the main extension plane of the transition region 77 encloses an obtuse angle with a main extension plane of the first region 84. For example, the transition region 77 adjoins the first region 84 in a blunt edge or in a rounded section.

In particular, the transition region 77 has a planar portion, which in particular is aligned substantially parallel to the envelope 88.

Furthermore, the suction head 38 has a second bottom wall 90. This second bottom wall 90 is connected to the second boundary wall 52 and connects to this. It extends from the second boundary wall 52 (from the outside 64b) toward the rear end 82 of the suction head 38.

The second bottom wall 90 has a second region 92 which is oriented at an acute angle 94 to the envelope 88.

The second region 92 is designed so that it recedes from the second boundary wall 52 toward the rear end 82 with respect to this envelope 88. The first region 84 and the second region 92 are formed by their angled arrangement to the envelope 88 as Auffahrschrägen. The acute angle 86 or 94 is in particular in the range between 5 ° and 15 °. The first suction edge 74, the second suction edge 76, the first boundary wall 50, the second boundary wall 52, the first bottom wall 78 and / or the second bottom wall 90 are preferably components of the sliding sole 41. The first boundary wall 50 and the second boundary wall 52 may be perpendicular or at an angle to the envelope 88. They can be parallel or not aligned parallel to each other or even parallel to each other.

In one embodiment, the second region 92 is followed by a region 96, which is oriented, for example, parallel to the envelope 88.

It is provided in particular that the first bottom wall 78 in its first region 84 and / or the second bottom wall 90 in its second region 92 can come into contact with textile material of the textile surface 72. Usually, no contact of the region 96 with the textile surface 72 is provided in a normal use.

In one exemplary embodiment, a thread lifter 98a, 98b are respectively arranged on the first region 84 of the first bottom wall 78 and on the second region 92 of the second bottom wall 90.

Thus, during operation of the floor nozzle 10 at the suction opening 70, a suction effect is produced (when the suction unit 12 is in operation and in fluidly effective connection with the suction chamber 60), an air flow 100, 100 '(see Figure 1) through the textile material of Textile surface 72 on the first suction edge 74 and the second suction edge 76 past flow into the suction chamber 60.

In the floor nozzle 10 (at least) another flow path 102, 102 'is provided, which is formed in the suction head 38, and via which the outer side 62b of the first suction edge 74 and the second outer side 64b of the second suction edge 76 air regardless of the flow through the textile material of the textile surface 72 can be fed. For this purpose, (at least) a first channel 104 is formed in the suction head 38, which is associated with the first suction edge 74. This first channel 104 has an inlet 106 from which air from the surroundings of the floor nozzle 10 can be coupled into the corresponding flow path 102 '(that is to say into the channel 104).

In one embodiment, the inlet 106 is formed by one or more openings formed between the first bottom wall 78 and a front wall 108 of the suction head 38. On the front wall 108 is the front end 80 of the suction head 38th

Due to the oblique arrangement of the first region 84 of the first bottom wall 78, the proper inlet 106 of the air outlet nozzle 10 is located at a distance from an upper side of the textile surface 72 for air.

In the same way, a second channel 110 is formed for the flow path 102 in the suction head 38, which (at least) has an inlet 112, which lies for example between the region 96 of the second bottom wall 90 and a rear wall 114 of the suction head 38. The rear end 82 of the suction head 38 is located on the rear wall 114.

Due to the configuration of the second bottom wall 90 described above, the inlet 112 is properly spaced and spaced from an upper surface of the textile surface 72.

The inlet or outlet 106 or 112 may also be arranged at a different location of the suction head 38 or the bottom body 14 (with a corresponding channel connection to the suction head 38) to a Luftzu- flow from the vicinity of the floor nozzle 10 through the suction head 38 therethrough enable. In one embodiment, the first bottom wall 78 forms a boundary of the first channel 104 with a corresponding inner side. The second bottom wall 90 forms a boundary of the second channel 110.

The first channel 104 has an outlet 116 over which in the

Flow path 102 'flowing air at the first outer side 62b of the first boundary wall 50 of the first suction edge 74 can be fed. As a result, an additional air flow 118 'to the air flow 100' is provided at the suction edge 74 via the flow path 102 ', which improves a suction result.

The second channel 110 has an outlet 120, via which an additional air flow 118 can be provided on the second outer side 64b of the second suction edge 76. This additional airflow 118 is an additional airflow relative to the airflow 100 through the textile material. It is thereby improved the suction effect.

The outlet 116 includes a plurality of openings 122 in the first bottom wall 78 in the immediate vicinity of the first suction edge 74.

In one embodiment, the openings 122 are slit-shaped and establish a flow-effective connection between the interior of the suction head 38 with the first channel 104 and an outer space in the region of the first suction edge 74.

The openings 122 are arranged in a row, wherein a longitudinal extension direction 124 of this row is in particular at least approximately parallel to the first suction edge 74.

Correspondingly, the outlet 120 is formed by openings 122 ', more particularly spaced slot-shaped openings in a row are arranged with a longitudinal extension direction at least approximately parallel to the second suction edge 76 (see Figure 4).

In the embodiment according to FIGS. 1 and 4, both the first suction edge 74 and the second suction edge 76 are assigned a respective outlet 116 with openings 122 or 120 with openings 122 '.

It is also possible (Figure 5) that only the second suction edge 76 of the corresponding outlet 120 is associated with openings 122 '(Figure 5).

In Figure 5, like reference numerals are used for like elements as in the embodiment according to Figures 1 and 4.

It is also possible that only the first suction edge 74 is associated with a corresponding outlet 116. (Not shown in the drawings)

It is provided that the openings 122, 122 'have a width B in a spacing direction 126 between the first suction edge 74 and the second suction edge 76, which lies in the range between 0.8 mm and 2.5 mm (see FIG. ,

This size dimension applies equally to the openings 122 associated with the first suction edge 74 and to the openings 122 'associated with the second suction edge 76.

Furthermore, it is preferably provided that a distance D in the spacing direction 126 between an opening 122 or 122 '(relative to an edge of the opening 122, 122', which is closest to the next suction edge 74 or 76) in the range between 0.5 mm and 2.5 mm. The openings 122, 122 'are thus in close proximity to the corresponding first suction edge 74 and second suction edge 76, respectively.

A single opening 122 or 122 'has a length L in a transverse direction 128 to the spacing direction 126, which follows the corresponding suction edge 74 and 76, respectively. In one embodiment, the openings 122, 122 'have a length L of the order of about 15 mm. It is envisaged that over all openings 122 or 122 'of the outlet 116 or 120, the total length of the outlet 116 or 120 as sum of all lengths L is at least 30% and preferably at least 70% of the corresponding associated first suction edge 74 or 76.

It is possible for a suction edge 74 or 76 to have a rectilinear extent (FIGS. 4, 5).

It is possible for a first suction edge and / or a second suction edge 130 (FIG. 6) to have a non-rectilinear design and, for example, to have a central region 132 on which curved on both sides

Connect areas 134a, 134b.

A corresponding outlet 136 with openings 138 follows the course of this suction edge (in the embodiment of the second suction edge 130) including the curvature.

A length of a corresponding opening 138 is then a length along a course line which is parallel to a course line of the corresponding second suction edge 130. The size dimensions mentioned here also apply to the width B and the distance D. Furthermore, a total length of the outlet 136 as the length of all openings 138 along the course of the second suction edge 130 is at least 30% and preferably at least 70% of the corresponding length of the second suction edge 130 along this course.

In the embodiment shown, in which the openings 122, 122 ', 138 are arranged in a row, lie between adjacent openings webs 140, which are in particular airtight. It is achieved by a high stability.

For example, it is also possible for a corresponding outlet 116, 120, 136 to be formed by a single opening. It is also possible that the corresponding openings are formed for example by a plurality of round holes or even square holes.

The slot-shaped openings 122, 122 ', 138 in the embodiments shown are rounded at their corners.

Through the outlets 116, 120, 136 in the respective bottom wall 78

or 90 can be the corresponding suction edge 74, 76 supply a bypass air flow, which comes from the environment of the floor nozzle 10 and at least partially the suction head 38 has flowed through.

The negative pressure of the suction chamber 60 via the suction unit 12 thereby drives this bypass air flow. It can be provided that the outlets 116, 120, 136 are permanently present. In one embodiment (FIGS. 1 to 3), an adjustment device 142 is provided, via which the air flow (bypass air flow) 118, 118 'can be varied by the respective outlets 116, 120. The adjusting device 142 comprises, associated with the respective outlets 116, 120, an adjusting element 144 which can act on the corresponding outlet 116, 120, 136 and via which an opening cross-section of the outlet 116, 120, 136 can be varied. In one embodiment, the adjustment member 144 is configured to provide the "closed outlet" positions 116 and 120 (with closed openings 122, 122 ') and the "open outlet" position.

For this purpose, in one embodiment within the suction head 38 on an outer side of the suction mouth 48 with the boundary walls 50, 52 a

Slider 146 of the adjusting device 142 guided slidably lockable. The adjustment members 144 are corresponding walls of the slider 146.

In an open position of the slider 146, which is detectable (Figure 1), the walls of the slider 146 and thus the adjusting elements 144 of the respective outlets 116, 120, 136 removed, so that just the additional air flow 118, 118 'of the first suction edge 74 and the second suction edge 76 is flowed. At a position 148 of this slider 146, which is shown in FIG. 2, the adjustment elements 144 cover the respective outlets 116, 120. As a result, the additional air flow 118 or 118 'can not be supplied to the respective suction edge 76 or 74. (Since then in the

Flow paths 102, 102 'is present no negative pressure, no air is sucked into the channels 104 and 110 in the rule.) In this case, provision is made in particular for the adjusting device 142 to be operable by means of a corresponding operating element 150, which is indicated in FIG. A user can thereby adjust whether the additional airflow 118 or 118 'is effective or not, that is, whether the outlets 116, 120 are open.

As mentioned above, the adjusting device can also be provided if only one single suction edge 74 or 76 is associated with an outlet (see FIG.

An embodiment shown in FIG. 3 of a floor nozzle device 11 'embodied as a floor nozzle 10' has a variant of an adjustment device 152. In a variant of an adjusting device 152 (see Figure 3), wherein the same reference numerals are used for the same elements as in the floor nozzle 10 according to Figures 1 and 2, the adjusting means 152 adjusting elements 154, which for immersion in corresponding openings 122, 122 'are provided.

The adjusting elements 144 are provided for covering the opening 122, 122 ', wherein in particular a cover between the corresponding first boundary wall 50 and the first bottom wall 78 and the second boundary wall 52 and the second bottom wall 90 takes place in an interior of the suction head 38.

By immersing the sliding adjusting 154 in the

Openings 122, 122 'are basically their opening areas variable. In one embodiment, it is provided that the adjusting elements 154 are formed so that depending on their depth of immersion in the corresponding

Opening 122, 122 'is a different opening area of the corresponding openings 122, 122 ', which results between zero inclusive and non-immersion complete opening.

With the adjusting device 142, the air flow 118, 118 ', which is then additionally present at the suction edges 74, 76, set between "present" and "not present" (zero air flow). In the adjustment device 152 with the variant described, depending on the insertion depth of the adjustment element 154 into the associated openings 122, 122 ', the additional air flow in intermediate regions can be varied.

In this case, an adjustment by an operator via the operating element 150 is possible.

In principle, it is also possible for a firm adjustment to take place at the factory during the production of the corresponding floor nozzle 10.

The adjustment device 142 or 152 makes it possible to adapt to different types of textile material, such as, for example, types of carpet. For example, an additional airflow 118, 118 'is not necessary for heavily air-permeable carpets. With closed outlets 116 and 120, a better suction can then be achieved with such a material.

With denser textile material can be at opening or partial opening of the outlets 116 and 120 at the first suction edge 74 and the second suction edge 76 reach a larger volume flow. This results in a greater transport force and a better suction result. Furthermore, the floor nozzle 10 sucks lower to the textile surface 72 when the outlets 116 and 120 are open. The additional air flow 118, 118 'thereby causes the pushing force of the floor nozzle 10 on the textile surface 72 (at forward thrust 44 or Reverse thrust 46) is reduced. This results in easier operation.

The floor nozzle 10 has a width b 2 on the suction head 38 (FIG. 5). The suction port 70 extends in the same direction over a width bl. It is provided that the width bl at least approximately corresponds to the width b2 and preferably the width bl is at least 90% and preferably at least 95% of the width b2. The floor nozzle 10 may be formed so that it alone has a textile surface cleaning function. It is then the first suction edge 74 and the second suction edge 76 constantly in an operative position.

In an advantageous embodiment, floor nozzle devices 11 ", 11" 'designed as floor nozzle 10 ", 10"' also each have a hard surface cleaning function.

For this purpose, a floor installation device 156 is arranged on the suction head (cf., for example, FIG. 2, which is in a non-operative position in the textile surface cleaning function).

The floor installation device 156 comprises brush lips 157 (or rubber lips), for example, which are in an operative position in the hard surface cleaning function and which are then supported on the surface 30 to be cleaned. (See Figures 7 and 8). In such a support then the first suction edge 74 and the second suction edge 76 in a non-operative position. This will be explained in more detail with reference to the embodiments according to FIGS. 7 and 8. FIG. 7 shows the floor nozzle device 11 "designed as a floor nozzle 10, in which the floor installation device 156 is in an operative position and thus the floor nozzle 10" in a hard surface device. Cleaning function is. In this position, a hard surface 158 can be sucked off as a surface to be cleaned 30 via the floor nozzle 10 ".

The ground facility 156 defines an envelope surface 160 over which it rests on the hard surface 158. In a height direction, the first suction edge 74 and the second suction edge 76 are spaced from this envelope surface 160 such that they are non-operational and do not touch the surface 30 to be cleaned. A switching device 162 is provided, by way of which it is possible to switch between the textile surface cleaning function and the hard surface cleaning function of the floor nozzle 10 ".

In the textile surface cleaning function, the floor installation device 156 is in a non-operative position and thereby displaced into the suction head 38 in such a way that the surface 30 to be cleaned is not acted upon (FIG. 1). In the textile surface cleaning function, the first suction edge 74 and the second suction edge 76 are in an operative position and they can penetrate into the textile material of the surface 30 to be cleaned.

In the hard surface cleaning function, the bottom equipment 156 is positioned over the switch 162 on the suction head 38 such that the envelope surface 160 is beyond the first suction edge 74 and the second suction edge 76. As a result, the first suction edge 74 and the second suction edge 76 are in a non-operative position and the ground engaging device 156 is in the operative position.

The floor installation device 156 in the hard surface cleaning function provides a fluid (approximately) sealing of a space 164 between the floor installation device 156 and the hard surface 158, with the suction mouth 48 positioned with the suction opening 70 in this space. In one exemplary embodiment of a floor nozzle device 11 "(FIG. 8) designed as a floor nozzle 10"', the switching device 162 is coupled to an adjustment device 166 for the additional air streams 118, 118'. The adjusting device 166 in this case has adjusting elements 168, which are coupled to the switching device 162 and serve to close the outlets 116, 120 with the openings 122, 122 '.

When the floor installation device 156 is in a non-operative position by appropriate adjustment on the switching device 162, then the adjustment elements 168 are positioned to release the outlets 116, 120 and so the additional air streams 118, 118 'the first suction edge 74 and the second suction edge 76 on the respective outer side of the access and boundary walls can be acted upon.

When the ground engaging device 156 is in its operative position, and thereby switching over by the switching means 162, the adjusting members 168 are positioned to close the outlets 116, 120 (Figure 8). As a result, no false air can be drawn in the hard surface cleaning function via the outlets 116, 120.

In this embodiment, the adjustment elements 168 are designed as a slide or arranged on a slide 170, which is guided displaceably in the suction head 38 in a variant. A displacement movement and positioning of the slider 170 is effected via the switching means 162 in such a way that as described in the operative position of the ground installation means 156, the outlets 116, 120 are closed and in the operative position of the suction edges 74, 76 (in one non operative position of the ground facility 156) the outlets 116, 120 are open.

According to the invention, it is provided that the floor nozzle 10 for the textile surface cleaning function has an additional flow path 102, 102 'for each of its suction edges 74, 76 or only a suction edge 74 or 76, via the air from the environment on an outer side of the suction mouth 48 of the respective suction edge 74, 76 is provided. This results in an improved suction result, especially with dense textile material. A larger volume flow at the suction mouth 48 results in a greater transport force for entrainment of dust particles.

Furthermore, the floor nozzle absorbs less to the textile material and the pushing force that is necessary for moving the floor nozzle on the textile material is reduced.

In a variant of an embodiment, an outlet 116 or 120 are closable or adjustable in cross-section to allow adaptation to textile material.

It may further be provided that a coupling of the variation of

Opening width (including closeability) to a switching between textile surface cleaning function and hard surface cleaning function is possible.

In the solution according to the invention, one or more openings 122, 122 'are arranged next to the corresponding suction edge 74 or 76 on a corresponding bottom wall 78 or 90, which in turn adjoin the respective outer side 62b, 64b of the corresponding one

Limiting wall 50, 52, to which the suction edge 74 and 76 are formed, are assigned. The ambient air, which then flows in via the corresponding additional air flow 118, 118 ', is less throttled than the air flows 100, 100', which flow through the textile material to the suction opening 70. The suction air in the additional air streams 118, 118 'has a shorter path through the textile material and is less throttled. As a result, a large volume flow is present at the corresponding suction edge 74, 76. During operation of the floor nozzle 10, this is connected to a suction unit 12. In particular, via a suction pipe, an operator moves the floor nozzle 10 over the surface 30 to be cleaned.

Another embodiment of a bottom nozzle device 111 according to the invention is shown schematically in FIG. The floor nozzle device 111 is formed as a floor nozzle 101 according to this embodiment. The bottom nozzle device 111 according to the exemplary embodiment of FIG. 9 differs essentially from the exemplary embodiments of FIGS. 1 to 3 in that there are no bypass channels and no ambient air flows in as an additional air flow 118, 118 '. The floor nozzle 101 does not comprise an adjusting device 142.

With a corresponding negative pressure by the suction unit 12 in the suction chamber 172, flows an air stream 174, 174 'of edge regions of the substantially trough-shaped suction head 176 through the textile

Material of the textile surface 178 at the first suction edge 180 and the second suction edge 182 over into the suction chamber 172nd

The first suction edge 180 and the second suction edge 182 each form part of the sliding sole 177. The first boundary wall 179 and the second boundary wall 181 preferably form components of the sliding sole 177.

Other flow paths are not provided. Incidentally, the exemplary embodiment illustrated in FIG. 9 is identical to the exemplary embodiment shown in FIG. 1, so that reference is made to the description thereof. Another illustrated in Figure 10 embodiment of a designed as a floor nozzle 101 'bottom nozzle device 111' differs in

Essentially characterized by the embodiment shown in Figure 9 that a ground installation device 184 is shown in an operative position.

In the operative position of the floor installation device 184, its brush lips 186, 186 'are in direct contact with the surface 30 to be cleaned. The suction head 188 is raised and lowered by the floor installation device 184 in comparison to the non-operative position in the textile surface cleaning function the brush lips 186, 186 'are jacked up by means of transmission walls 192 extending substantially parallel to an envelope surface 190. The first suction edge 194 and the second suction edge 196 are spaced from the surface 30 to be cleaned in the hard surface cleaning function.

Toward the surface 30 to be cleaned, a space 200 is created between a lower side 198 of the sliding sole 202, the suction space 204 and the surface 30 to be cleaned, which is sealed by the brush lips 186, 186 '.

In this room 200, dust and the like are sucked out by negative pressure. Incidentally, the exemplary embodiment illustrated in FIG. 10 corresponds to the exemplary embodiment illustrated in FIG. 9, so that reference is made to the description thereof in this respect.

As can be seen, in particular, from the bottom (see FIG. 11) of the suction head 176, the bottom nozzle device 111 preferably has a suction channel 175 with a substantially rectangular cross-section. The cross section is taken in particular along a plane which runs parallel to the textile surface 178.

The suction channel 175 is preferably formed laterally closed.

The suction channel 175 has in particular a curved shape.

As can be seen in particular from FIG. 12, the width of a cross section decreases towards lateral edges of the floor nozzle 101. The cross-section is taken perpendicular to an envelope surface of the textile surface 178 passing through the center of the suction channel 175.

The exemplary embodiment of a bottom nozzle device 111 "designed as a bottom nozzle 101 differs from the embodiment of a bottom nozzle device 111 shown in FIG. 9 essentially in that the sliding sole 206 does not extend over the entire underside 207 of the suction head 208.

The sliding sole 206 made of the composite material is in this case designed in two parts and in each case in the region of the first suction edge 210

or arranged in the region of the second suction edge 212. The soleplate 206 extends substantially over the areas that are in material contact with the textile material of the surface 30 to be cleaned in the textile area cleaning function. Thus, charging effects can be reduced and the mechanical rigidity can be optimized, however, a large part of the bottom nozzle device 111 "can be made of a plastic material different from the composite material, for example, for areas other than the sliding sole 206, a plastic material without filler or a plastic material different from the composite material Be used for II substances. Otherwise, the exemplary embodiment of a bottom nozzle device 111 "shown in Figure 13 corresponds to the embodiment shown in Figure 9, so that reference is made to the description thereof in Figure 14. An embodiment of a cleaning roller 220 according to the invention is shown schematically in Figure 14. The cleaning roller 220 is particularly suitable for use in a floor nozzle device or a suction machine according to the invention

Cleaning roller 220 are mounted and used in a sweeper or a self-propelled and self-steering vacuum robot.

The cleaning roller 220 preferably has an at least approximately cylindrical base body 222. The cleaning roller 220 further comprises in particular a shaft 224, which is arranged on opposite end sides of the base body 222 and the rotatable attachment to a (not shown) cleaning roller receptacle is used. The shaft 224 is arranged parallel to a longitudinal central axis 226. The longitudinal center axis 226 is parallel to a rotation axis about which the cleaning roller 220 is rotatably mounted.

On a lateral surface 228 of the base body 222, a bristle receptacle 230 for receiving a plurality of bristles 232 is arranged.

The bristles 232 are in particular substantially cylindrical, for example circular cylindrical. Individual bristles 232 preferably have a diameter perpendicular to their main extension direction of about 0.3 mm to 2.0 mm, preferably 0.5 mm to 1.5 mm.

Preferably, the base body 222 forms the bristle receptacle 230. In one embodiment, the bristle receptacle 230 comprises openings 234, in particular parallel rows of openings 234 in projections 236, which are arranged on the lateral surface 228 of the base body 222. The projections 236 are preferably rib-shaped and extend parallel to the longitudinal central axis 226 along the lateral surface 228. In the openings 234 bristles 232 are accommodated, which are arranged in bundles 235. The bundles 235 preferably have a diameter of about 5 mm or more.

The bristles 232 extend in bundles 235 radially away from the longitudinal central axis 226.

The bundles 235 are arranged in particular in rows, which are arranged parallel to one another.

In an assembled state of the cleaning roller 220, the dust is whirled up by means of the bristles 232 in the rotating operation of the cleaning roller 220 and thrown into an adjacently arranged suction space in which the dust is sucked off.

Preferably, the bristles 232 have a length of about 5 cm or more, more preferably about 15 cm or less.

The overall diameter of the cleaning roller 220 is preferably about 10 cm or more to about 40 cm, preferably about 25 cm or more. Preferably, the total diameter of the cleaning roller 220 is about 40 cm or less, more preferably about 35 cm or less. The bristles 232 are preferably arranged in bundles 235 which extend radially away from the longitudinal central axis 226.

The bundles 235 preferably form rows of bundles 235, which are arranged parallel to the longitudinal central axis 226 in the projections 236 of the bristle holder 230.

One row comprises, for example, 50 to 60 bundles 235. In addition or as an alternative, provision may be made for bristles 232 or

Bundles 235 of bristles 232 are arranged helically or v-shaped around the base body 222.

The bristles 232 according to the invention are made of a composite material comprising a polymer and carbon-based fibers and / or carbon-based platelets as filler.

Polyamide, in particular polyamide 6 or polyamide 66, is preferably suitable as the matrix material. For example, the composite material contains carbon fibers in a proportion of about 13% by weight, based on the total mass of the composite material.

In addition, one or more of the related to the

Composite material of the floor nozzle device 11 mentioned features and advantages for the composite material of the cleaning roller 220 alike.

FIG. 15 shows an embodiment of a suction machine 242 designed as a self-steering and self-propelled vacuum robot 240 from below. The vacuum robot 240 includes a floor nozzle device 244.

In one embodiment, the vacuum robot 240 forms a suction head 246, which has an at least approximately spherical segment-shaped area includes, which forms in the operation of the vacuum robot 240 facing away from the surface to be cleaned 30 upper side.

The at least approximately spherical segment-shaped region of the suction head 246 is formed, for example, flattened and / or is closed at its edges by one of the surface to be cleaned 30 facing bottom 241. The underside 241 is arranged with respect to the direction of gravity below the suction head 246 and is formed substantially planar. In operation of the vacuum robot 240, areas of the underside 241 are preferably in direct material contact with the surface 30 to be cleaned. In addition or alternatively, areas of the bottom 241 in operation of the vacuum robot 240 in particular a small distance to the surface to be cleaned, such that a Air flow between the bottom 241 and the surface to be cleaned 30 can be generated by the dust and the like is sucked.

The underside 241 preferably comprises a sliding sole 248, which in one embodiment forms the underside 241. Alternatively, it can be provided that the sliding sole 248 partially forms the lower side 241 and other regions have different properties.

The sliding sole 248 is produced according to the invention from a composite material. The composite material comprises at least one polymer as matrix material and carbon-based fibers, in particular carbon fibers, and / or carbon-based platelets, in particular carbon platelets, as filler.

For example, the sliding sole 248 comprises as the matrix material polyamide 6, in which about 10 wt.% To about 12 wt.% Carbon fibers are dispersed. The carbon fibers in the raw state preferably have a length of about 1 to about 4 mm. In one embodiment, the sliding sole 248 is manufactured in an injection molding process. In a preferred embodiment, all areas of the bottom 241, which are in direct contact with the surface 30 to be cleaned during operation of the vacuum robot 240, are formed by the sliding sole 248 of the composite material according to the invention. The sliding sole 248 comprises an opening 250, which forms a suction mouth 252. About the suction mouth 252 dust can be sucked by means of negative pressure.

Incidentally, the composite material has one or more of the features and advantages explained above.

In one embodiment, the suction mouth 252 is formed in a parallel to the bottom 241 taken cross-section substantially rectangular. The suction mouth 252 has a main extension direction, which is aligned substantially perpendicular to a main movement direction 254 of the suction robot 240.

It can be provided that a cleaning roller 256 according to the invention is arranged in an edge region of the suction mouth 252, the bristle filaments and / or bristles of which are produced from the composite material according to the invention. A longitudinal central axis of the cleaning roller 256 is in

Substantially perpendicular to the main movement direction 254 of the vacuum robot 240. In one embodiment, the bristles of the cleaning roller 256 are arranged in bundles which are arranged spirally around the longitudinal central axis of the cleaning roller 256. Incidentally, the suction mouth 252 is preferably designed as in the exemplary embodiments described in connection with FIGS. 1 to 13. The vacuum robot 240 includes on its underside 241, for example in an equatorial area of the underside 241, a wheel 258, preferably two wheels 258, 258 ', for moving the vacuum robot 240 on the surface to be cleaned 30. In one embodiment, the wheels 258, 258 'rotatably mounted about axes of rotation, which are arranged perpendicular to the main movement direction 254 of the vacuum robot 240. Alternatively it can be provided that the axes of rotation of the wheels 258, 258 'enclose an obtuse angle with each other and / or the axes of rotation at the intersection of the axes of rotation of the two wheels 258, 258' each include an acute angle with the main direction of movement 254 of the vacuum robot 240.

By means of the wheels 258, 258 ', the vacuum robot 240 is movable over the surface 30 to be cleaned.

The vacuum robot 240 comprises a control device 260 for controlling the movement and suction power of the vacuum robot 240. The control device 260 preferably comprises one or more sensor devices. FIG. 16 shows a diagram in which measurement results are documented. The charging V in volts [V] of test bars of different materials was measured. Test rod ends with a sprayed smooth surface and a width of about 20 mm, a thickness of about 4 mm and a length of about 35 mm were used. The test bars were pressed with a force of 30 N on a test carpet according to EN 60312 and moved with an average speed of 0.3 m / s with 10 double strokes over a sliding length of about 20 cm. To determine the frictional force according to FIG. 16, a test rod according to DIN EN ISO 527-2 Type 1A with a length of approximately 170 mm, a width of approximately 20 mm and a thickness of approximately 4 mm with a total weight of 800 g was in each case obtained Press a test carpet in accordance with EN 60312 and measure the tensile force Fi in Newton [N] which, when drawn, is produced at a speed of 0.5 m / s over a length of 0.5 m on the immediately lifted test rod. The weight was placed in the rear area of the test bar when viewed in the pulling direction.

Test bars were made:

- polyamide 6 (PA6), - polycarbonate / acrylonitrile-butadiene-styrene copolymer (PC / ABS) - (85%

 Polycarbonate and 15% ABS) -,

Polyamide 6 with a carbon fiber content of 15% by weight, based on the total mass of the composite material (PA6CF15),

Polyamide 6 with a glass fiber content of 15 wt.% (PA6GF15) and

- Polymethylmethacrylate (PMMA) examined.

In addition, the force Fi to be applied was measured in Newton [N] for drawing over the test carpet and applied. The measurement results shown in Figure 16 clearly show that of the examined test bars alone the test rod from the inventive Composite material (PA6CF15) shows no measurable electrostatic charges.

With regard to the force to be applied for pulling the weighted test bars over the test carpet, all examined test bars show comparable results of about 15 N. The minimally lower force Fi for test bars made of PC / ABS and PMMA compared to test bars made from the inventive composite material PA6CF15 is insulated in this respect not meaningful, since due to the high electrostatic charge is a worse in relation to dust pickup and the suction power for comparable dust recordings must be increased so that the expended pushing force is significantly increased (see Figure 17).

FIG. 17 shows a diagram in which measurement results for investigations of the pushing force F _{2 to be applied} in the case of bottom nozzles made of different materials are shown.

In this case, the sliding force of a floor nozzle to be used was measured as a function of the materials with a previously set comparable dust absorption dpu _c in% (more than 80%) in accordance with the standard EN 60312.

There were floor nozzles from:

Polyamide 6 with a carbon fiber content of 15% by weight (PA6CF15),

- polyamide 6 (PA6),

Polycarbonate / acrylonitrile-butadiene-styrene copolymer (PC / ABS), - polyamide 6 with a glass fiber content of 15% by weight (PA6GF15) and Polyamide / acrylonitrile-butadiene-styrene copolymer (PA / ABS) in a proportion of 50% PA and 50% ABS examined.

As can be clearly seen from the diagram shown in FIG. 17, the floor nozzle comprising the composite material PA6CF15 according to the invention exhibits the best sliding behavior in the materials investigated. Relative to the dust absorption, the floor nozzle of the composite material according to the invention has the best sliding behavior.

Especially with a high dust absorption of more than 80%, only a slight pushing force of approximately 45 N has to be used for floor nozzles made from the composite material PA6CF15 according to the invention, in order to push the floor nozzle over the test carpet. This results from the improved sliding behavior and the low electrostatic charging effects, as shown in FIGS. 16 and 17.

LIST OF REFERENCE NUMBERS

floor nozzle

'Floor nozzle

"Floor nozzle

"'Floor nozzle

 Floor nozzle device

'Floor nozzle device

"Floor nozzle device

'' Floor nozzle device

 suction unit

 sediment

 connection

 pipe socket

 elbow

 joint

 axis of rotation

 First part

 Second part

 stabilizer

 Area to be cleaned

 axis of rotation

 joint

 swivel axis

 suction head

 bottom

 pivot

 soleplate

 swivel axis

 forward stroke

return stroke saugmund

 First boundary wall

Second boundary wall

top wall

opening

 channel

 suction

a First inside side First outside side Second inside side Second outside

 Side wall

 Side wall

 suction opening

 textile surface

 First suction edge

Second suction edge

Transition area

First floor wall

 Front end

Rear end

First area

acute angle

envelope

 Second bottom wall

Second area

acute angle

Area

a thread lifter

b Thread lifter

0 airflow

0 'airflow 101 floor nozzle

101 'floor nozzle

 101 "floor nozzle

 102 flow path

 102 'flow path

 104 First channel

 106 inlet

 108 front wall

 110 Second channel

 111 floor nozzle device

111 'floor nozzle device

111 "floor nozzle device

112 inlet

 114 rear wall

 116 outlet

 118 Additional airflow

118 'Additional airflow

120 outlet

 122 opening

 122 'opening

 124 longitudinal direction

126 distance direction

 128 transverse direction

 130 Second suction edge

 132 Middle range

 134a Curved area

134b Curved area

136 outlet

 138 opening

 140 footbridge

142 adjustment device 144 adjustment element

 146 pushers

 148 position

 150 control element

 152 adjustment device

154 adjustment element

 156 ground facility facility

157 brush lips

 158 hard surface

 160 enveloping area

162 switching device

164 room

 166 adjustment device

168 adjustment element

 170 pushers

 172 suction chamber

 174 airflow

 174 'airflow

 175 suction channel

 176 suction head

 177 sliding sole

 178 textile area

 179 First boundary wall

180 First suction edge

 181 Second boundary wall

182 Second suction edge

184 ground facility

186 brush lips

 186 'brush lips

 188 suction head

 190 enveloping area

192 transmission walls 194 First suction edge

 196 Second suction edge

198 bottom

 200 room

 202 sliding sole

 204 suction chamber

 206 sliding sole

 207 bottom

 208 suction head

 210 First suction edge

 212 Second suction edge

220 cleaning roller

 222 basic body

 224 wave

 226 longitudinal central axis

 228 lateral surface

 230 bristle pickup

 232 bristles

 234 openings

 235 bundles

 236 protrusions

 240 vacuum robots

 241 bottom

 242 suction machine

 244 floor nozzle device

246 suction head

 248 sliding sole

 250 opening

 252 suction mouth

 254 main direction of movement

256 cleaning roller

258 wheels bikes

 control device

Claims

claims

A floor nozzle device having a fabric surface cleaning function comprising a bottom body (14) and a sliding sole (41; 177; 202; 206; 248) which is operative during operation of the floor nozzle device (11; 11 '; 11 "; 11"'; 111; 111 '; 111 "; 244) is in contact with a surface (30) to be cleaned, characterized in that the sliding sole (41; 177; 202; 206; 248) is made of a composite material comprising a matrix material of at least a polymer and fibers of an electrically conductive material and / or platelets of an electrically conductive material as a filler.

2. Floor nozzle device according to claim 1, characterized in that the filler of the composite material has a resistivity of about 100 Q-mm ² / m or less, preferably about 50 Q-mm ² / m or less, more preferably about 20 Q-mm ² / m or less.

3. Floor nozzle device according to claim 1 or 2, characterized in that the composite material has a surface resistivity of about 25 Ω or more, in particular about 250 Ω or more.

4. Floor nozzle device according to one of claims 1 to 3, characterized in that the composite material has a surface resistivity of about 1-10 ⁸ Ω or less, in particular of about 1-10 ⁷ Ω or less.

5. Floor nozzle device according to one of claims 1 to 4, characterized in that the filler is at least approximately homogeneously distributed in the matrix material.

6. floor nozzle device according to one of claims 1 to 5, characterized

 characterized in that the fibers of an electrically conductive

 Material carbon-based fibers, in particular carbon fibers, and / or the platelets of an electrically conductive material are carbon-based platelets, in particular carbon platelets.

7. Floor nozzle device according to one of claims 1 to 6, characterized

 in that the composite material comprises the fibers of an electrically conductive material and / or the platelets of an electrically conductive material as filler in a proportion of approximately

5% by weight or more, preferably about 10% by weight or more, more preferably about 15% by weight or more.

8. floor nozzle device according to one of claims 1 to 7, characterized

 in that the composite material comprises the fibers of an electrically conductive material and / or platelets of an electrically conductive material as filler in a proportion of about 50% by weight or less, preferably of about 40% by weight or less, in particular of about 30% by weight % or less.

9. floor nozzle device according to one of claims 1 to 8, characterized

characterized in that the composite material of the sliding sole (41; 177; 202; 206; 248) of the floor nozzle device (11; 11 '; 11 ";11"';111; 111 '; 111 "; 244) is processable in a forming process ,

10. Floor nozzle device according to one of claims 1 to 9, characterized in that the fibers of an electrically conductive

 Material and / or the platelets of an electrically conductive material having an average length / diameter of about 80 μηι or more, preferably about 100 μηι or more, in particular about 500 μηι or more.

11. Floor nozzle device according to one of claims 1 to 10, characterized in that the fibers of an electrically conductive

 Material and / or the platelets of an electrically conductive material have an average length / diameter of about 4 mm or less, preferably about 3 mm or less, in particular about 2 mm or less.

12. Floor nozzle device according to one of claims 1 to 11, characterized in that the matrix material comprises or is formed from one or more of the following polymers: polyamide (PA), in particular polyamide 6 (PA6) or polyamide 66 (PA66), polycarbonate (PC ), Acrylonitrile (AC), butadiene, styrene, in particular acrylonitrile-butadiene copolymer (ABS), polyolefin, in particular polypropylene (PP), polyketone, polymethyl methacrylate (PMMA), polyvinyl chloride (PVC).

13. Floor nozzle device according to one of claims 1 to 12, characterized in that the composite material comprises polyamide 6 and / or polyamide 66 as matrix material and carbon fibers as filler in a proportion of 5 wt.% To 15 wt.%.

14. Floor nozzle device according to one of claims 1 to 13, characterized in that the bottom nozzle device (11; 11 '; 11 "; 11"'; 111; 111 '; 111 ") comprises a suction mouth (48; 252) which adjoins the Sliding sole (41; 177; 202; 206; 248) and / or is formed by the sliding sole (41; 177; 202; 206; 248).

15. A floor nozzle device according to any one of claims 1 to 14, characterized in that the sliding sole (41; 177; 202; 206; 248) forms a contact surface to the surface to be cleaned and / or on a lower side (198; 207; 241) of the bottom body (14) is arranged or forms the underside (198, 207, 241) of the bottom body (14).

16. The floor nozzle device according to any one of claims 1 to 15, characterized in that the sliding sole (41; 177; 202; 206; 248) comprises an upper portion and a lower portion such that the lower portion follows the upper portion that a contact surface following the lower region and / or formed by the lower region, and that the fibers of an electrically conductive material and / or the plates of an electrically conductive material as filler have a higher concentration in the lower region and a lower concentration in the upper region Area of the sliding sole (41, 177, 202, 206, 248).

17. The floor nozzle device according to claim 14, characterized in that the suction mouth (48; 252) has a first boundary wall (50; 179) with a first suction edge (74; 180; 194; 210) and a first boundary wall (50; 179) having a second suction edge (76; 130; 182; 196; 212), the first and second suction edges (74, 76; 130; 180, 182; 194, 196; 210, 212) for immersion in textile material of a textile surface (72, 178) are provided, the first Boundary wall (50, 179) has a first inner side (62a) and a first outer side (62b), the second boundary wall (52, 181) has a second inner side (64a) and a second outer side (64b), the first inner side (62a) the second inner side (64a) facing and between the first inner side (62a) and the second inner side (64a) is formed a suction opening (70).

A floor nozzle device according to claim 17, characterized in that the floor nozzle device (11; 11 '; 11 "; 11"'; 111; 111 '; 111 "; 244) comprises a suction head (38) attached to the bottom body (14). arranged in the suction head (38) at least one flow path is formed by the air from an environment of the bottom nozzle device (11; 244) through the suction head (38) through the first suction edge (74) on the first outer side (62a) and / or the second suction edge (76; 130) on the second outer side (64b) can be fed.

19. Floor nozzle device according to claim 18, characterized in that by an adjusting device (142, 152, 166) an air supply via the at least one flow path (102, 102 ') in the suction head (38) to the first suction edge (74) and / or second suction edge (76; 130) is adjustable.

20. Floor nozzle device according to claim 19, characterized in that the adjusting device (142; 152; 166) is designed so that an air supply through the at least one flow path (102, 102 ') to the first suction edge (74) and / or the second Suction edge (76, 130) is lockable.

21. Floor nozzle device according to one of claims 17 to 20, characterized in that the floor nozzle device (11; 244) comprises a switching device (162) for switching from the textile surface cleaning function into a hard surface cleaning function.

A floor nozzle device according to claim 21, characterized in that the floor nozzle device (11; 11 '; 11 ";11"';111; 111 '; 111 "; 244) comprises a suction head (38) disposed on the bottom body (14) in that at least one flow path (102, 102 ') is formed in the suction head (38) through the air from an environment of the bottom nozzle device (11; 244) through the suction head (38) of the first suction edge (74) on the first outer side (62a) and / or the second suction edge (76; 130) on the second outer side (64b) can be fed that by an adjusting device (142; 152; 166) an air supply via the at least one flow path in the suction head (38) to the first The switching device (162) is coupled to the adjusting device (142; 152; 166), wherein, in particular when switching to the hard surface cleaning function, the at least one of the at least two suction edges (74) and / or the second suction edge (76; a flow path with respect to de r air supply to the first suction edge (74) and / or the second suction edge (76; 130) is locked.

23. Floor nozzle device according to one of claims 1 to 22, characterized by a design as a floor nozzle (10; 10 '; 10 "; 10"'; 101; 101 '; 101 ").

A cleaning roller for a textile surface cleaning, wherein the cleaning roller (220; 256) comprises a plurality of bristles (232) and a bristle holder (230) for receiving the plurality of bristles, wherein the plurality of bristles (232), in particular in bundles (235), in the Wherein the plurality of bristles (232) and / or the bristle receptacle (230) is made of a composite material comprising a matrix material of at least one polymer and fibers of an electrically conductive material and / or platelets of an electrically conductive Material includes as a filler.

25. Cleaning roller according to claim 24, characterized in that the filler of the composite material has a specific electrical resistance of about 100 Q-mm ² / m or less, preferably about

50 Q-mm ² / m or less, more preferably about 20 Q-mm ² / m or less.

26. Cleaning roller according to claim 24 or 25, characterized in that the composite material has a surface resistivity of about 25 Ω or more, in particular about 250 Ω or more.

27. Cleaning roller according to one of claims 24 to 26, characterized in that the composite material has a surface resistivity of about 1-10 ⁸ Ω or less, in particular of about 1-10 ⁷ Ω or less, having.

28. cleaning roller according to one of claims 24 to 27, characterized in that the filler is at least approximately homogeneously distributed in the matrix material.

29. Cleaning roller according to one of claims 24 to 28, characterized in that the fibers of an electrically conductive material are carbon-based fibers, in particular carbon fibers, and / or the platelets of an electrically conductive material are carbon-based platelets, in particular carbon platelets.

30. Cleaning roller according to one of claims 24 to 29, characterized in that the composite material, the fibers of an electrically conductive material and / or the platelets of an electrically conductive material as a filler in a proportion of about 5 wt.% Or more, preferably from about 10% by weight or more, more preferably about 15% by weight or more.

31. Cleaning roller according to one of claims 24 to 30, characterized in that the composite material, the fibers of an electrically conductive material and / or the platelets of an electrically conductive material as a filler in a proportion of about 50 wt.% Or less, preferably from about 40% by weight or less, especially about 30% by weight or less.

32. Cleaning roller according to one of claims 24 to 31, characterized in that the composite material can be processed in a forming process.

33. Cleaning roller according to one of claims 24 to 32, characterized in that the fibers of an electrically conductive material and / or the platelets of an electrically conductive material has an average length / diameter of about 80 pm or more, preferably about 100 pm or more , in particular about 500 pm or more.

34. cleaning roller according to one of claims 24 to 33, characterized in that the fibers of an electrically conductive material and / or the platelets of an electrically conductive material has an average length / diameter of about 4 mm or less, preferably about 3 mm or less , in particular about 2 mm or less.

35. Cleaning roller according to one of claims 24 to 34, characterized in that the matrix material comprises or is formed from one or more of the following polymers: polyamide (PA), in particular polyamide 6 (PA6) or polyamide 66 (PA66), polycarbonate (PC )

 Acrylonitrile (AC), butadiene, styrene, in particular acrylonitrile-butadiene copolymer (ABS), polyolefin, in particular polypropylene (PP),

 Polyketone, polymethyl methacrylate (PMMA), polyvinyl chloride (PVC).

36. cleaning roller according to one of claims 24 to 35, characterized in that the composite material polyamide 6 or nylon 66 as a matrix material and carbon fibers as a filler in a proportion of

5% by weight to 15% by weight.

37. cleaning roller according to one of claims 24 to 36, characterized in that the cleaning roller (220; 256) comprises a base body (222) which is at least approximately cylindrical in shape and on the lateral surface (228) of the bristle holder (230) is arranged and the plurality of bristles (232) extend at least approximately radially away from a longitudinal central axis (226) of the cleaning roller (220; 256).

38. A suction machine comprising a bottom nozzle device (11, 11 ', 11' ';

 11 "'; 111; 111'; 111"; 244) according to any one of claims 1 to 23 and / or a cleaning roller (220; 256) according to any one of claims 24 to 37.

39. Suction machine according to claim 38, characterized by a design as a vacuum cleaner, as a self-propelled and self-steering vacuum robot (240) and / or as a sweeper.