EP3808241A1 - Vacuum cleaning robot for autonomous cleaning of floor surfaces of a room - Google Patents

Vacuum cleaning robot for autonomous cleaning of floor surfaces of a room Download PDF

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Publication number
EP3808241A1
EP3808241A1 EP20196799.9A EP20196799A EP3808241A1 EP 3808241 A1 EP3808241 A1 EP 3808241A1 EP 20196799 A EP20196799 A EP 20196799A EP 3808241 A1 EP3808241 A1 EP 3808241A1
Authority
EP
European Patent Office
Prior art keywords
brush
vacuum cleaner
auxiliary
main
main brush
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20196799.9A
Other languages
German (de)
French (fr)
Other versions
EP3808241B1 (en
Inventor
Thomas Pott
Tobias SOMMER
Ramona Vahle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Miele und Cie KG
Original Assignee
Miele und Cie KG
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Publication date
Application filed by Miele und Cie KG filed Critical Miele und Cie KG
Publication of EP3808241A1 publication Critical patent/EP3808241A1/en
Application granted granted Critical
Publication of EP3808241B1 publication Critical patent/EP3808241B1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/02—Nozzles
    • A47L9/04—Nozzles with driven brushes or agitators
    • A47L9/0461—Dust-loosening tools, e.g. agitators, brushes
    • A47L9/0466—Rotating tools
    • A47L9/0477—Rolls
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2201/00—Robotic cleaning machines, i.e. with automatic control of the travelling movement or the cleaning operation

Definitions

  • the invention relates to a robot vacuum cleaner according to the preamble of claim 1.
  • the vacuum robot in the sense of the present application is suitable for the autonomous cleaning of floor surfaces in a room.
  • the robot vacuum cleaner comprises a housing in which a suction fan for generating a suction air flow and a dirt container or dust bag for receiving dirt particles are arranged.
  • the robot vacuum cleaner also has a suction mouth which is arranged on the housing and extends transversely to the direction of travel of the housing. This suction mouth is fluidically connected to the suction fan by means of a suction channel.
  • dirt particles located on the floor surface can be picked up by the floor surface by means of the suction air flow at the suction mouth and conveyed to the dirt container or the dust bag by means of the suction channel.
  • the floor surfaces of a room are contaminated as a result of the deposition of various types of dirt.
  • This usually includes fine dust, such as sand or the finest particles, and coarse dirt, such as crumbs or stones.
  • coarse dirt such as crumbs or stones.
  • the resulting requirements for the cleaning performance of a robot vacuum cleaner are partly in conflict with one another.
  • robotic vacuum cleaners which have a comparatively low power consumption, it is therefore often necessary to arrange the robot's suction unit at the smallest possible distance from a floor surface. This creates a particularly tight seal between the suction unit of the robotic vacuum cleaner and the floor covering.
  • the suction unit of a robotic vacuum cleaner usually comprises a suction mouth and a rotatable brush, which is arranged within the suction mouth of the robotic vacuum cleaner.
  • the high level of impermeability between the suction unit and the floor covering ensures efficient use of the suction air flow generated by the suction fan, which in particular makes optimum use of the fine dust that is picked up by the suction air flow.
  • the coarse dirt should also be able to be picked up.
  • a large inlet opening results in a reduction in the suction air flow in the area of the inlet opening, which leads to reduced fine dust uptake by the robot vacuum cleaner.
  • the robot vacuum cleaner according to the invention is characterized by an auxiliary brush which - viewed against the direction of travel of the robot vacuum cleaner - is located in front of the main brush and extends parallel to the main brush, the auxiliary brush being arranged relative to the main brush in such a way that a horizontal plane of action of the auxiliary brush up to which a brush element of the auxiliary brush extends maximally downward, is arranged vertically above a horizontal effective plane of the main brush, up to which a brush element of the main brush extends maximally downward, so that the effective planes are arranged at a distance from one another.
  • the robot vacuum cleaner according to the invention has a suction mechanism which has a suction mouth, a main brush, an auxiliary brush and a sealing lamella.
  • the horizontal planes of action of the main brush and the auxiliary roller can, however, also lie on a common plane.
  • an effective plane is understood to mean that horizontal plane within which dirt particles can be picked up by means of the brush elements of the main brush or the auxiliary brush.
  • the robot vacuum cleaner according to the invention has many advantages.
  • the arrangement of the working planes of the main brush and the auxiliary brush at a distance from one another enables different types of dirt particles to be picked up.
  • the auxiliary brush which is located in front of the main brush, is primarily used to seal the suction unit and to pick up coarse dirt, while the main brush is primarily used to transport the fine dust and coarse dirt lying on a floor surface to the dirt container or dust bag.
  • the distance between the brush elements of the main brush and the floor surface to be cleaned is preferably so small that, on the one hand, the fine dust and coarse dirt can be picked up and, on the other hand, the fine dust and coarse dirt are conveyed through the suction channel into the dirt container or dirt bag with the additional effect of the suction air flow. It is also conceivable here to arrange the main brush in such a way that the plane of action of the main brush coincides with the floor surface. In contrast, the plane of action of the auxiliary brush is arranged at a greater distance from the floor surface.
  • the distance is such chosen so that a sufficient tightness of the suction unit to the floor surface of the room is created, which ensures that the suction air flow generated by the suction fan can be used efficiently at the suction unit and thereby counteracts a reduction in the cleaning effect of the vacuum robot.
  • the auxiliary brush is preferably designed in such a way that it can transport the coarse dirt to the main brush. It is preferably provided that, when the robot vacuum cleaner is in operation, the coarse dirt and fine dust are conveyed from the auxiliary brush to the main brush by means of the suction air flow.
  • the latter transports the dirt particles to a dirt container or dust bag by means of the additional effect of the suction air flow.
  • the above arrangement of the working planes enables fine dust and coarse dirt to be picked up, while at the same time the suction mechanism can be sufficiently sealed against the floor surface to be cleaned.
  • the robot vacuum cleaner according to the invention can thus achieve a cleaning effect even in the case of a low power consumption, in which different types of dirt particles are equally picked up from the floor surface.
  • the lengths of the main brush and the auxiliary brush are advantageously at least substantially, preferably exactly, the same.
  • the distance between the effective planes is a maximum of 5 mm, preferably a maximum of 3 mm, more preferably a maximum of 1.5 mm. It has been found that such an arrangement of the working planes is particularly advantageous, in particular with regard to sufficient tightness of the robotic vacuum cleaner on the one hand and an effect of the suction air flow in the area of the suction mechanism of the robotic vacuum cleaner on the other hand.
  • An advantageous embodiment of the invention provides that at least one brush element, preferably all brush elements, of the auxiliary brush have a smaller radial length in relation to a brush body of the auxiliary brush than at least one brush element, preferably all brush elements, of the main brush in relation to a brush body of the main brush.
  • the plane of action of the main brush as well as that of the auxiliary brush is determined on the one hand by the respective distance of the respective brush body from the floor surface to be cleaned and on the other hand by the radial length of the respective brush element.
  • a lower limit with regard to the size of the dirt particles to be picked up by the respective brush can thus advantageously be adapted by varying the distance between the respective brush body and the floor surface and by changing the radial length of the respective brush element.
  • both the brush body of the main brush and that of the auxiliary brush are arranged at a common distance from the bottom surface on the housing.
  • the distance between the planes of action can then be adjusted by adjusting the radial length of the Brush elements are adjusted.
  • the radial length of the brush elements of the main brush and that of the auxiliary brush match and the distance between the working planes can be adjusted by means of the distance between the respective brush body and the floor surface to be cleaned.
  • an outer diameter of the auxiliary brush is smaller than an outer diameter of the main brush. It is preferably provided that an outer diameter of the main brush is between 30 mm and 50 mm, preferably between 35 mm and 45 mm, more preferably between 38 mm and 42 mm. In contrast, an external diameter of the auxiliary brush is preferably between 15 mm and 40 mm, preferably between 18 mm and 27 mm, more preferably between 20 mm and 25 mm. The outer diameter of the respective brush is determined on the one hand by a diameter of the respective brush core and on the other hand by the radial length of the respective brush elements.
  • the auxiliary brush has a plurality of brush elements which are preferably arranged equidistantly over a circumference of the associated brush body. In this way, improved and faster cleaning of the floor surface can advantageously take place.
  • the at least one brush element of the auxiliary brush is formed from a flexible plastic, in particular in the form of a rubber lamella. It has been found that the formation of the brush element of the auxiliary brush from a flexible plastic is particularly advantageous, particularly with regard to the absorption of the coarse dirt and the transport of the dirt particles in the direction of the main brush. In particular, such a design enables the brush element to be deformed.
  • the brush element can thus advantageously adapt particularly well to a shape of the dirt particle to be picked up, as a result of which the cleaning effect of the robotic vacuum cleaner is additionally improved.
  • a flexible brush element ensures that the suction unit is sufficiently sealed against the floor surface.
  • the at least one brush element of the auxiliary brush is formed by a flexible plastic in the form of tufts of bristles.
  • the brush elements of the auxiliary brush are formed by at least one tuft of bristles and at least one rubber lamella.
  • the at least one brush element of the main brush preferably a plurality of brush elements of the main brush, are formed by tufts of bristles. This also increases the cleaning effect of the robot vacuum cleaner. It is preferably provided that the respective brush element is formed from a plurality of filaments which are combined to form a brush element.
  • the filaments are formed from a flexible plastic in order to enable the tufts of bristles to be adapted to the respective floor surface and to the dirt particles to be picked up.
  • the at least one brush element of the main brush is formed by a rubber lamella.
  • the brush elements of the main brush are formed by at least one rubber lamella and at least one tuft of bristles.
  • the auxiliary brush can be driven in rotation, the main brush and the auxiliary brush preferably being able to be driven in the same direction of rotation.
  • the cleaning effect of the robotic vacuum cleaner can advantageously be further increased in this way.
  • the rotary movement of the auxiliary brush and the main brush there is an improved transport of the dirt particles to the dirt container or dust bag of the vacuum robot.
  • the transfer of the coarse dirt, which is preferably first caught by the auxiliary brush, to the main brush is also improved by means of the rotary movement of the auxiliary brush.
  • An advantageous embodiment of the invention provides that the auxiliary brush and / or the main brush can be driven as a function of a driving speed of the robotic vacuum cleaner.
  • the driving speed of the robot vacuum cleaner is increased, the number of times the auxiliary brush and / or the main brush wipe the floor surface is reduced in relation to the distance covered by the robot vacuum cleaner while the speed of the auxiliary brush and / or the main brush remains the same.
  • a constant cleaning effect of the robotic vacuum cleaner can thus advantageously be achieved over the entire operation, regardless of the driving speed. It is preferably provided here that the rotary movement is also increased when the driving speed is increased and is reduced when the driving speed is reduced.
  • the main brush and the auxiliary brush are driven by a drive which is in operative connection both with the main brush and with the auxiliary brush.
  • a drive which is in operative connection both with the main brush and with the auxiliary brush.
  • Another embodiment of the invention provides a sealing lamella arranged behind the main brush, viewed against the direction of travel of the robotic vacuum cleaner, whose plane of action preferably coincides with the plane of action of the main brush.
  • the sealing lamella fulfills two functions: on the one hand, the sealing lamella ensures that the Achieved suction mechanism to the floor surface in a rear area of the vacuum robot, which leads to the fact that the suction air flow is not weakened and thus the cleaning effect is ensured. On the other hand, the sealing lamella acts like a dustpan.
  • the sealing lamella does not push dirt particles picked up by the auxiliary brush or by the main brush in front of it, which are then conveyed to the dirt container by the action of the suction air flow in the area of the main brush. It is preferably provided that the sealing lamella as well as the main brush rest on the floor surface and thus ensure that the suction unit of the robot vacuum cleaner is sufficiently sealed.
  • the sealing lamella is formed from a flexible plastic, in particular from a rubber lamella.
  • the sealing lamella can thus advantageously adapt to unevenness in the floor surface. Furthermore, this prevents damage to the bottom surface, which would occur, for example, if the sealing lamella were formed in the form of a metal.
  • the sealing lamella is inclined, preferably at an angle in the range between 25 ° and 65 °, more preferably at an angle of 45 °, with respect to the vertical.
  • the sweeping function of the same is additionally increased. It has been found that, if the sealing lamella is arranged perpendicular to the floor surface, it tends to buckle when driving over unevenness in the floor surface, in particular if the sealing lamella is formed from a flexible plastic. The result is a reduction in the cleaning effect of the sealing lamella.
  • the sealing lamella is either arranged in such a way that the sealing lamella pushes the dirt particles in front of it or has such an orientation in which the dirt particles are “drawn”.
  • the cleaning effect of the sealing lamella is additionally improved and therefore results in an improved cleaning of the floor surface.
  • An embodiment that is in the Figures 1 to 3 comprises a vacuum robot 1 for autonomous cleaning of a floor surface 22 of a room 23.
  • FIG. 1 shows a vacuum robot 1 according to the prior art.
  • the robot vacuum cleaner 1 comprises a housing 2 with a round cross section.
  • a suction fan 3 for generating a suction air flow and a dirt container 4 for receiving dirt particles are arranged in the housing.
  • the robot vacuum cleaner 1 On an underside 24, the robot vacuum cleaner 1 also has a suction mouth 5, which is fluidically connected to the suction fan 3 by means of a suction channel 6.
  • a main brush 7, which is set in a rotary movement by means of a drive not shown in detail in the figures.
  • the main brush 7 extends transversely to a direction of travel 8 of the housing 2.
  • FIG. 2 and 3 An embodiment of a robot vacuum cleaner 1 according to the invention is shown in Figures 2 and 3 shown.
  • the robot vacuum cleaner 1 according to the invention has, as in Figure 2 shown, also has a main brush 7.
  • the main brush 7 is arranged on an underside 24 of the robot vacuum cleaner 1 and ends flush with the housing 2 at the side.
  • the main brush 7 is formed here from a brush body 17 and a plurality of brush elements 13, which are arranged equidistantly over a circumference of the brush body 17.
  • the individual brush elements 13 are formed by individual tufts of bristles made from a flexible plastic.
  • the robot vacuum cleaner 1 has an auxiliary brush 9, which is shown in FIG Figure 3 is shown. This is upstream of the main brush 7, viewed against the direction of travel 8 of the robotic vacuum cleaner 1.
  • the auxiliary brush 9 extends parallel to the main brush 7 and is also formed from a brush body 19 and a plurality of brush elements 11.
  • the brush elements 11 of the auxiliary brush 9 are each in the form of a rubber lamella consisting of a flexible plastic.
  • An outer diameter 15 of the main brush 7 is approximately 43 mm, while an outer diameter 16 of the auxiliary brush 9 is approximately 24 mm.
  • a radial length 18 of the brush element 11 of the auxiliary brush 9 in relation to the brush body 19 of the same is less than a radial length 25 of the brush element 13 of the main brush 7 on the brush body 17 of the same.
  • the main brush 7 and the auxiliary brush 9 are mounted on the housing such that they can be rotated by means of a common drive and have the same direction of rotation.
  • the direction of rotation is oriented in such a way that the brush elements 11, 13 move downward, ie towards the floor surface 22, when viewed from a front side of the robotic vacuum cleaner 1.
  • the robot vacuum cleaner 1 has a sealing lamella 20, which is also arranged on an underside 24 of the housing 2 and extends over the entire width of the robot vacuum cleaner 1.
  • the sealing lamella 20, which in Figure 2 is shown, is here arranged behind the main brush 7 and designed in the form of a rubber lamella.
  • the sealing lamella 20 is aligned at an angle 26 of approximately 57 ° with respect to a vertical on the housing 2.
  • the main brush 7, the auxiliary brush 9 and the sealing lamella 20 each have an effective plane 10, 12, 21 within which dirt particles can be picked up.
  • the effective plane 10, 12 of the main brush 7 and the auxiliary brush 9 is each determined by the plane up to which an associated brush element 11, 13 extends maximally downward, i.e. in the direction of the floor surface 22 to be cleaned.
  • the plane of action of the sealing lamella 20 is determined by the plane up to which the sealing lamella 20 itself extends maximally downward.
  • the main brush 7 is mounted on the housing 2 in such a way that the brush elements 13 touch the bottom surface 22.
  • the plane of action 10 of the main brush 7 thus coincides with the floor surface 22 of the space 23.
  • the working plane 12 of the auxiliary brush 9 is arranged at a distance 14 of approximately 3 mm from the working plane 12 of the main brush 7.
  • the housing 2 of the robot vacuum cleaner 1 is shaped in such a way that it follows an outer contour of the auxiliary brush 9 as well as the main brush 7.
  • the housing 2 of the robot vacuum cleaner 1 is provided in a front area with an inlet opening 27 which corresponds approximately to the maximum size of the dirt particles to be picked up.
  • the plane of action 21 of the sealing lamella 20 is also arranged at a distance 29 from the bottom surface 22.
  • the distance 29 is selected in such a way that, on the one hand, sufficient tightness is achieved in a rear area of the robot vacuum cleaner 1 and thus the effect of the suction air flow generated by the suction fan 3 is not reduced and, on the other hand, damage to the floor surface 22 is avoided.
  • dirt particles located on the floor surface 22 are conveyed in a first step as a result of the rotary movement of the auxiliary brush 9 in the direction of the main brush 7.
  • those dirt particles are captured by the auxiliary brush 9, the size of which corresponds to the inlet opening 27 of the floor surface 22.
  • this is coarse dirt in the form of crumbs or stones.
  • Smaller dirt particles, in particular fine dust, are not captured by the auxiliary brush 9 when the robotic vacuum cleaner 1 passes over them, but are captured by the action of the suction air flow at the inlet opening 27.
  • the dirt particles transported by the auxiliary brush 9 in the direction of the main brush 7 are then picked up by the main brush 7.
  • the sealing lamella 20 acts in the manner of a dustpan and thus enables additional absorption of the dirt particles. Furthermore, the sealing lamella 20 has a sealing effect for the rear area of the robot vacuum cleaner 1. The front area of the robot vacuum cleaner 1 is largely sealed off from the floor surface 22 by means of the auxiliary brush 9. This ensures that the suction air flow generated by the suction fan 3 is not reduced and thus the best possible cleaning performance of the robotic vacuum cleaner 1 is ensured, while at the same time picking up different types of dirt particles, in particular fine dust and coarse dirt, is equally possible.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles For Electric Vacuum Cleaners (AREA)

Abstract

Die vorliegende Erfindung betrifft einen Saugroboter (1) zur autonomen Reinigung von Bodenflächen, umfassend ein Gehäuse (2), ein in dem Gehäuse (2) angeordnetes Sauggebläse (3) zur Erzeugung eines Saugluftstroms, einen in dem Gehäuse (2) angeordneten Schmutzbehälter (4) zur Aufnahme von Schmutzpartikeln, einen Saugmund (5), einen Saugkanal (6) zur strömungstechnischen Verbindung des Saugmundes (5) mit dem Sauggebläse (3) sowie eine an dem Gehäuse (2) angeordnete, drehantreibbare Hauptbürste (7), wobei Schmutzpartikel mittels zusätzlicher Wirkung des Saugluftstroms am Saugmund (5) von der Bodenfläche aufnehmbar und mittels des Saugkanals (6) zu dem Schmutzbehälter (4) beförderbar sind, wobei sich die Hauptbürste (7) quer zu einer Fahrtrichtung (8) des Gehäuses (2) erstreckt.Um einen Saugroboter bereitzustellen, welcher zur Aufnahme von Feinstaub als auch von Grobschmutz gleichermaßen geeignet ist, wird erfindungsgemäß eine Hilfsbürste (9) vorgeschlagen, die - entgegen der Fahrtrichtung (8) des Saugroboters (1) betrachtet - der Hauptbürste (7) vorgelagert ist und sich parallel zu der Hauptbürste (7) erstreckt, wobei die Hilfsbürste (9) derart relativ zu der Hauptbürste (7) angeordnet ist, dass eine horizontale Wirkebene (12) der Hilfsbürste (9), bis zu der sich ein Bürstenelement (11) der Hilfsbürste (9) maximal nach unten erstreckt, vertikal oberhalb einer horizontalen Wirkebene (10) der Hauptbürste (7) angeordnet ist, bis zu der sich ein Bürstenelement (13) der Hauptbürste (7) maximal nach unten erstreckt, sodass die Wirkebenen (10, 12) in einem Abstand (14) voneinander angeordnet sind.The present invention relates to a vacuum robot (1) for the autonomous cleaning of floor surfaces, comprising a housing (2), a suction fan (3) arranged in the housing (2) for generating a suction air flow, a dirt container (4) arranged in the housing (2) ) for receiving dirt particles, a suction mouth (5), a suction channel (6) for the fluidic connection of the suction mouth (5) with the suction fan (3) and a rotatable main brush (7) arranged on the housing (2), with dirt particles by means of The additional effect of the suction air flow at the suction mouth (5) can be absorbed by the floor surface and conveyed to the dirt container (4) by means of the suction channel (6), the main brush (7) extending transversely to a direction of travel (8) of the housing (2). In order to provide a vacuum robot which is equally suitable for picking up fine dust and coarse dirt, an auxiliary brush (9) is proposed according to the invention, which - against the direction of travel (8) of the robot vacuum cleaner (1) viewed - the main brush (7) is upstream and extends parallel to the main brush (7), the auxiliary brush (9) being arranged relative to the main brush (7) in such a way that a horizontal working plane ( 12) of the auxiliary brush (9), up to which a brush element (11) of the auxiliary brush (9) extends maximally downwards, is arranged vertically above a horizontal working plane (10) of the main brush (7), up to which a brush element ( 13) of the main brush (7) extends maximally downwards, so that the working planes (10, 12) are arranged at a distance (14) from one another.

Description

Die Erfindung betrifft einen Saugroboter gemäß dem Oberbegriff von Anspruch 1.The invention relates to a robot vacuum cleaner according to the preamble of claim 1.

Der Saugroboter im Sinne der vorliegenden Anmeldung eignet sich zur autonomen Reinigung von Bodenflächen eines Raums. Dabei umfasst der Saugroboter ein Gehäuse, in dem ein Sauggebläse zur Erzeugung eines Saugluftstroms sowie ein Schmutzbehälter oder ein Staubbeutel zur Aufnahme von Schmutzpartikeln angeordnet sind. Ferner weist der Saugroboter einen Saugmund auf, welches an dem Gehäuse angeordnet ist und sich quer zur Fahrtrichtung des Gehäuses erstreckt. Dieser Saugmund ist mittels eines Saugkanals strömungstechnisch mit dem Sauggebläse verbunden. Hierbei sind auf der Bodenfläche befindliche Schmutzpartikel mittels Wirkung des Saugluftstroms am Saugmund von der Bodenfläche aufnehmbar und mittels des Saugkanals zum dem Schmutzbehälter oder dem Staubbeutel beförderbar.The vacuum robot in the sense of the present application is suitable for the autonomous cleaning of floor surfaces in a room. The robot vacuum cleaner comprises a housing in which a suction fan for generating a suction air flow and a dirt container or dust bag for receiving dirt particles are arranged. The robot vacuum cleaner also has a suction mouth which is arranged on the housing and extends transversely to the direction of travel of the housing. This suction mouth is fluidically connected to the suction fan by means of a suction channel. In this case, dirt particles located on the floor surface can be picked up by the floor surface by means of the suction air flow at the suction mouth and conveyed to the dirt container or the dust bag by means of the suction channel.

Typischerweise sind die Bodenflächen eines Raums infolge einer Ablagerung verschiedenartiger Schmutzpartikel verunreinigt. Dazu zählen in aller Regel Feinstaub, wie Sand oder feinste Partikel, und Grobschmutz, wie beispielsweise Krümel oder Steine. Die sich hieraus ergebenden Anforderungen an die Reinigungsleistung eines Saugroboters stehen teilweise in einem Zielkonflikt zueinander. Bei Saugrobotern, welche eine vergleichsweise niedrige Leistungsaufnahme besitzen, ist es deshalb oftmals erforderlich, dass Saugwerk des Roboters in einem möglichst geringen Abstand zu einer Bodenfläche anzuordnen. Hierdurch wird eine besondere Dichtigkeit zwischen dem Saugwerk des Saugroboters und dem Bodenbelag erreicht. Das Saugwerk eines Saugroboters umfasst dabei in der Regel einen Saugmund und eine drehbare Bürste, welche innerhalb des Saugmundes des Saugroboters angeordnet ist. Die hohe Dichtigkeit zwischen Saugwerk und Bodenbelag sorgt für eine effiziente Nutzung des vom dem Sauggebläse erzeugten Saugluftstroms, wodurch insbesondere die Aufnahme vom Feinstaub durch den Saugluftstrom optimal genutzt wird. Gleichzeitig soll aber auch die Aufnahme des Grobschmutzes ermöglicht werden. Hierbei ist es allerdings nötig, eine Eintrittsöffnung im Saugwerk des Saugroboters vorzusehen, deren Größe in etwa der Größe des Grobschmutzes entspricht, um zu verhindern, dass der Grobschmutz vor dem Saugwerk des Saugroboters hergeschoben wird. Eine große Eintrittsöffnung resultiert jedoch in einer Verringerung des Saugluftstroms im Bereich der Eintrittsöffnung, was zu einer verminderten Feinstaubaufnahme des Saugroboters führt.Typically, the floor surfaces of a room are contaminated as a result of the deposition of various types of dirt. This usually includes fine dust, such as sand or the finest particles, and coarse dirt, such as crumbs or stones. The resulting requirements for the cleaning performance of a robot vacuum cleaner are partly in conflict with one another. In the case of robotic vacuum cleaners, which have a comparatively low power consumption, it is therefore often necessary to arrange the robot's suction unit at the smallest possible distance from a floor surface. This creates a particularly tight seal between the suction unit of the robotic vacuum cleaner and the floor covering. The suction unit of a robotic vacuum cleaner usually comprises a suction mouth and a rotatable brush, which is arranged within the suction mouth of the robotic vacuum cleaner. The high level of impermeability between the suction unit and the floor covering ensures efficient use of the suction air flow generated by the suction fan, which in particular makes optimum use of the fine dust that is picked up by the suction air flow. At the same time, the coarse dirt should also be able to be picked up. In this case, however, it is necessary to provide an inlet opening in the suction unit of the robot vacuum cleaner, the size of which corresponds approximately to the size of the coarse dirt in order to prevent the coarse dirt from being pushed in front of the suction unit of the robot vacuum cleaner. A large inlet opening, however, results in a reduction in the suction air flow in the area of the inlet opening, which leads to reduced fine dust uptake by the robot vacuum cleaner.

Saugroboter der eingangs beschriebenen Art sind in dem Stand der Technik bekannt. Die bekannten Saugroboter weisen in aller Regel einen geringen Abstand zu der zu reinigenden Bodenfläche auf. Hierdurch wird zwar die Aufnahme von Feinstaub ermöglicht, die gleichzeitige Aufnahme von Grobschmutz hat sich allerdings als problematisch herausgestellt.Vacuum robots of the type described at the outset are known in the prior art. The known robotic vacuum cleaners usually have a short distance to the one to be cleaned Floor area on. Although this enables fine dust to be picked up, the simultaneous pick-up of coarse dirt has turned out to be problematic.

Es ist daher Aufgabe der vorliegenden Erfindung, einen Saugroboter bereitzustellen, welcher gleichermaßen eine gute Reinigungsleistung für Feinstaub und Grobschmutz erzielt.It is therefore the object of the present invention to provide a vacuum robot which achieves good cleaning performance for both fine dust and coarse dirt.

Die vorstehende Aufgabe wird ausgehend von einem Saugroboter der eingangs beschriebenen Art mittels eines Saugroboters mit den Merkmalen des Anspruchs 1 gelöst. Vorteilhafte Ausgestaltungen ergeben sich aus den Unteransprüchen 2 bis 15.The above object is achieved on the basis of a robot vacuum cleaner of the type described in the introduction by means of a robot vacuum cleaner with the features of claim 1. Advantageous refinements result from subclaims 2 to 15.

Der erfindungsgemäße Saugroboter zeichnet durch eine Hilfsbürste aus, die - entgegen der Fahrtrichtung des Saugroboters betrachtet - der Hauptbürste vorgelagert ist und sich parallel zu der Hauptbürste erstreckt, wobei die Hilfsbürste derart relativ zu der Hauptbürste angeordnet ist, dass eine horizontale Wirkebene der Hilfsbürste, bis zu der sich ein Bürstenelement der Hilfsbürste maximal nach unten erstreckt, vertikal oberhalb einer horizontalen Wirkebene der Hauptbürste angeordnet ist, bis zu der sich ein Bürstenelement der Hauptbürste maximal nach unten erstreckt, sodass die Wirkebenen in einem Abstand voneinander angeordnet sind. Der erfindungsgemäße Saugroboter weist ein Saugwerk auf, welches einen Saugmund, eine Hauptbürste, eine Hilfsbürste und eine Dichtlamelle aufweist. In einer alternativen Ausführungsform können die horizontalen Wirkebenen der Hauptbürste und der Hilfswalze aber auch auf einer gemeinsamen Ebene liegen.The robot vacuum cleaner according to the invention is characterized by an auxiliary brush which - viewed against the direction of travel of the robot vacuum cleaner - is located in front of the main brush and extends parallel to the main brush, the auxiliary brush being arranged relative to the main brush in such a way that a horizontal plane of action of the auxiliary brush up to which a brush element of the auxiliary brush extends maximally downward, is arranged vertically above a horizontal effective plane of the main brush, up to which a brush element of the main brush extends maximally downward, so that the effective planes are arranged at a distance from one another. The robot vacuum cleaner according to the invention has a suction mechanism which has a suction mouth, a main brush, an auxiliary brush and a sealing lamella. In an alternative embodiment, the horizontal planes of action of the main brush and the auxiliary roller can, however, also lie on a common plane.

Im Sinne der vorliegenden Anmeldung wird unter einer Wirkebene diejenige horizontale Ebene verstanden, innerhalb derer eine Aufnahme von Schmutzpartikeln mittels der Bürstenelemente der Hauptbürste bzw. der Hilfsbürste möglich ist.In the context of the present application, an effective plane is understood to mean that horizontal plane within which dirt particles can be picked up by means of the brush elements of the main brush or the auxiliary brush.

Der erfindungsgemäße Saugroboter hat viele Vorteile. Insbesondere ermöglicht die Anordnung der Wirkebenen der Hauptbürste und der Hilfsbürste in einem Abstand voneinander die Aufnahme verschiedenartiger Schmutzpartikel. Hierbei ist vorzugsweise vorgesehen, dass die Hilfsbürste, welche der Hauptbürste vorgelagert ist, vornehmlich zur Abdichtung des Saugwerkes sowie zur Aufnahme von Grobschmutz dient, während die Hauptbürste vornehmlich zur Beförderung des auf einer Bodenfläche aufliegenden Feinstaubs und Grobschmutzes zum Schmutzbehälter oder Staubbeutel dient. Vorzugsweise ist der Abstand der Bürstenelemente der Hauptbürste zu der zu reinigenden Bodenfläche derart gering, dass einerseits die Aufnahme des Feinstaubs und des Grobschmutzes ermöglicht wird und andererseits der Feinstaub und der Grobschmutz mit zusätzlicher Wirkung des Saugluftstroms durch den Saugkanal in den Schmutzbehälter oder Schmutzbeutel befördert werden. Vorstellbar ist hierbei auch eine Anordnung der Hauptbürste in der Art, dass die Wirkebene der Hauptbürste mit der Bodenfläche zusammenfällt. Die Wirkebene der Hilfsbürste hingegen ist in einem größeren Abstand zu der Bodenfläche angeordnet. Hierbei ist der Abstand derart gewählt, dass eine ausreichende Dichtigkeit des Saugwerkes zu der Bodenfläche des Raums erzeugt wird, wodurch sichergestellt wird, dass der von dem Sauggebläse erzeugte Saugluftstrom am Saugwerk effizient genutzt werden kann und dadurch einer Verminderung der Reinigungswirkung des Saugroboters entgegenwirkt. Hierdurch wird vorteilhafter Weise eine Aufnahme von Feinstaub am Saugwerk mittels Wirkung der Saugluftströmung ermöglicht. Gleichzeitig ist die Hilfsbürste vorzugsweise in der Art ausgeführt, dass diese den Grobschmutz zur Hauptbürste transportieren kann. Vorzugsweise ist vorgesehen, dass bei einem Betrieb des Saugroboters der Grobschmutz und der Feinstaub von der Hilfsbürste mittels Wirkung des Saugluftstroms zu der Hauptbürste befördert wird. Letztere transportiert die Schmutzpartikel mittels zusätzlicher Wirkung des Saugluftstroms zu einem Schmutzbehälter oder Staubbeutel. Vorteilhafter Weise wird mittels der vorstehenden Anordnung der Wirkebenen somit die Aufnahme von Feinstaub sowie Grobschmutz ermöglicht, wobei gleichzeitig eine ausreichende Dichtigkeit des Saugwerkes zu der zu reinigenden Bodenfläche herstellbar ist. Der erfindungsgemäße Saugroboter kann somit auch im Falle einer niedrigen Leistungsaufnahme eine Reinigungswirkung erzielen, bei der verschiedenartige Schmutzpartikel von der Bodenfläche gleichermaßen aufgenommen werden. Die Längen der Hauptbürste und der Hilfsbürste sind vorteilhafter Weise zumindest im Wesentlichen, vorzugsweise genau, gleich.The robot vacuum cleaner according to the invention has many advantages. In particular, the arrangement of the working planes of the main brush and the auxiliary brush at a distance from one another enables different types of dirt particles to be picked up. It is preferably provided that the auxiliary brush, which is located in front of the main brush, is primarily used to seal the suction unit and to pick up coarse dirt, while the main brush is primarily used to transport the fine dust and coarse dirt lying on a floor surface to the dirt container or dust bag. The distance between the brush elements of the main brush and the floor surface to be cleaned is preferably so small that, on the one hand, the fine dust and coarse dirt can be picked up and, on the other hand, the fine dust and coarse dirt are conveyed through the suction channel into the dirt container or dirt bag with the additional effect of the suction air flow. It is also conceivable here to arrange the main brush in such a way that the plane of action of the main brush coincides with the floor surface. In contrast, the plane of action of the auxiliary brush is arranged at a greater distance from the floor surface. Here the distance is such chosen so that a sufficient tightness of the suction unit to the floor surface of the room is created, which ensures that the suction air flow generated by the suction fan can be used efficiently at the suction unit and thereby counteracts a reduction in the cleaning effect of the vacuum robot. This advantageously enables fine dust to be picked up on the suction unit by means of the suction air flow. At the same time, the auxiliary brush is preferably designed in such a way that it can transport the coarse dirt to the main brush. It is preferably provided that, when the robot vacuum cleaner is in operation, the coarse dirt and fine dust are conveyed from the auxiliary brush to the main brush by means of the suction air flow. The latter transports the dirt particles to a dirt container or dust bag by means of the additional effect of the suction air flow. Advantageously, the above arrangement of the working planes enables fine dust and coarse dirt to be picked up, while at the same time the suction mechanism can be sufficiently sealed against the floor surface to be cleaned. The robot vacuum cleaner according to the invention can thus achieve a cleaning effect even in the case of a low power consumption, in which different types of dirt particles are equally picked up from the floor surface. The lengths of the main brush and the auxiliary brush are advantageously at least substantially, preferably exactly, the same.

Es ist gemäß einem weiteren Merkmal der Erfindung vorgesehen, dass der Abstand zwischen den Wirkebenen maximal 5 mm, vorzugsweise maximal 3 mm, weiter vorzugsweise maximal 1,5 mm, beträgt. Es hat sich herausgestellt, dass eine derartige Anordnung der Wirkebenen insbesondere im Hinblick auf eine ausreichende Dichtigkeit des Saugroboters einerseits und auf eine Wirkung des Saugluftstroms im Bereich des Saugwerkes des Saugroboters andererseits besonders vorteilhaft ist.According to a further feature of the invention, it is provided that the distance between the effective planes is a maximum of 5 mm, preferably a maximum of 3 mm, more preferably a maximum of 1.5 mm. It has been found that such an arrangement of the working planes is particularly advantageous, in particular with regard to sufficient tightness of the robotic vacuum cleaner on the one hand and an effect of the suction air flow in the area of the suction mechanism of the robotic vacuum cleaner on the other hand.

Eine vorteilhafte Ausgestaltung der Erfindung sieht vor, dass mindestens ein Bürstenelement, vorzugsweise sämtliche Bürstenelemente, der Hilfsbürste eine geringere radiale Länge bezogen auf einen Bürstenkörper der Hilfsbürste aufweisen als mindestens ein Bürstenelement, vorzugsweise sämtliche Bürstenelemente, der Hauptbürste bezogen auf einen Bürstenkörper der Hauptbürste. Die Wirkebene der Hauptbürste als auch die der Hilfsbürste wird einerseits von dem jeweiligen Abstand des jeweiligen Bürstenkörpers von der zu reinigenden Bodenfläche und andererseits von der radialen Länge des jeweiligen Bürstenelements bestimmt. Eine untere Grenze hinsichtlich einer Größe der von der jeweiligen Bürste aufzunehmenden Schmutzpartikel kann vorteilhafter Weise somit mittels einer Variation des Abstands des jeweiligen Bürstenkörpers zu der Bodenfläche als auch mittels einer Änderung der radialen Länge des jeweiligen Bürstenelements angepasst werden. So ist beispielsweise vorstellbar, dass sowohl der Bürstenkörper der Hauptbürste als auch der der Hilfsbürste in einem gemeinsamen Abstand zu der Bodenfläche an dem Gehäuse angeordnet sind. Der Abstand der Wirkebenen derselben kann sodann mittels einer Anpassung der radialen Länge der Bürstenelemente eingestellt werden. Ebenso ist jedoch auch denkbar, dass die radiale Länge der Bürstenelemente der Hauptbürste als auch die der Hilfsbürste übereinstimmt und der Abstand zwischen den Wirkebenen mittels des Abstands des jeweiligen Bürstenkörpers von der zu reinigenden Bodenfläche einstellbar ist.An advantageous embodiment of the invention provides that at least one brush element, preferably all brush elements, of the auxiliary brush have a smaller radial length in relation to a brush body of the auxiliary brush than at least one brush element, preferably all brush elements, of the main brush in relation to a brush body of the main brush. The plane of action of the main brush as well as that of the auxiliary brush is determined on the one hand by the respective distance of the respective brush body from the floor surface to be cleaned and on the other hand by the radial length of the respective brush element. A lower limit with regard to the size of the dirt particles to be picked up by the respective brush can thus advantageously be adapted by varying the distance between the respective brush body and the floor surface and by changing the radial length of the respective brush element. For example, it is conceivable that both the brush body of the main brush and that of the auxiliary brush are arranged at a common distance from the bottom surface on the housing. The distance between the planes of action can then be adjusted by adjusting the radial length of the Brush elements are adjusted. However, it is also conceivable that the radial length of the brush elements of the main brush and that of the auxiliary brush match and the distance between the working planes can be adjusted by means of the distance between the respective brush body and the floor surface to be cleaned.

Gemäß einer vorzugsweisen Ausgestaltung ist ein Außendurchmesser der Hilfsbürste kleiner als ein Außendurchmesser der Hauptbürste. Dabei ist vorzugsweise vorgesehen, dass ein Außendurchmesser der Hauptbürste zwischen 30 mm und 50 mm, vorzugsweise zwischen 35 mm und 45 mm, weiter vorzugsweise zwischen 38 mm und 42 mm, beträgt. Hingegen beträgt ein Außendurchmesser der Hilfsbürste vorzugsweise zwischen 15 mm und 40 mm, vorzugsweise zwischen 18 mm und 27 mm, weiter vorzugsweise zwischen 20 mm und 25 mm. Dabei wird der Außendurchmesser der jeweiligen Bürste zum einen von einem Durchmesser des jeweiligen Bürstenkerns als auch von der radialen Länge der jeweiligen Bürstenelemente bestimmt.According to a preferred embodiment, an outer diameter of the auxiliary brush is smaller than an outer diameter of the main brush. It is preferably provided that an outer diameter of the main brush is between 30 mm and 50 mm, preferably between 35 mm and 45 mm, more preferably between 38 mm and 42 mm. In contrast, an external diameter of the auxiliary brush is preferably between 15 mm and 40 mm, preferably between 18 mm and 27 mm, more preferably between 20 mm and 25 mm. The outer diameter of the respective brush is determined on the one hand by a diameter of the respective brush core and on the other hand by the radial length of the respective brush elements.

Eine besonders vorteilhafte Weiterentwicklung des erfindungsgemäßen Saugroboters sieht vor, dass die Hilfsbürste eine Mehrzahl von Bürstenelementen aufweist, die vorzugsweise äquidistant über einen Umfang des zugeordneten Bürstenkörpers verteilt angeordnet sind. Vorteilhafter Weise kann hierdurch eine verbesserte und schnellere Reinigung der Bodenfläche erfolgen.A particularly advantageous further development of the robot vacuum cleaner according to the invention provides that the auxiliary brush has a plurality of brush elements which are preferably arranged equidistantly over a circumference of the associated brush body. In this way, improved and faster cleaning of the floor surface can advantageously take place.

Vorzugsweise ist, dass das mindestens eine Bürstenelement der Hilfsbürste von einem flexiblen Kunststoff, insbesondere in Form einer Gummilamelle, gebildet wird. Es hat sich herausgestellt, dass die Ausformung des Bürstenelements der Hilfsbürste aus einem flexiblen Kunststoff besonders im Hinblick auf die Aufnahme des Grobschmutzes als auch des Transports der Schmutzpartikel in Richtung der Hauptbürste besonders vorteilhaft ist. Insbesondere ermöglicht eine derartige Ausbildung eine Verformung des Bürstenelements. Vorteilhafter Weise kann sich das Bürstenelement somit besonders gut an eine Form des aufzunehmenden Schmutzpartikels anpassen, wodurch die Reinigungswirkung des Saugroboters zusätzlich verbessert wird. Weiterhin wird durch ein flexibles Bürstenelement eine ausreichende Dichtigkeit des Saugwerks zur Bodenfläche sichergestellt. In einer alternativen Ausführungsform wird das mindestens eine Bürstenelement der Hilfsbürste durch eine flexiblen Kunststoff in Form von Borstenbüscheln gebildet. In weiteren alternativen Ausführungsform werden die Bürstenelemente der Hilfsbürste durch mindestens ein Borstenbüschel und mindestens eine Gummilamellen gebildet.It is preferred that the at least one brush element of the auxiliary brush is formed from a flexible plastic, in particular in the form of a rubber lamella. It has been found that the formation of the brush element of the auxiliary brush from a flexible plastic is particularly advantageous, particularly with regard to the absorption of the coarse dirt and the transport of the dirt particles in the direction of the main brush. In particular, such a design enables the brush element to be deformed. The brush element can thus advantageously adapt particularly well to a shape of the dirt particle to be picked up, as a result of which the cleaning effect of the robotic vacuum cleaner is additionally improved. Furthermore, a flexible brush element ensures that the suction unit is sufficiently sealed against the floor surface. In an alternative embodiment, the at least one brush element of the auxiliary brush is formed by a flexible plastic in the form of tufts of bristles. In a further alternative embodiment, the brush elements of the auxiliary brush are formed by at least one tuft of bristles and at least one rubber lamella.

Eine weitere Ausgestaltung der Erfindung sieht vor, dass das mindestens eine Bürstenelement der Hauptbürste, vorzugsweise eine Vielzahl von Bürstenelementen der Hauptbürste, von Borstenbüscheln gebildet sind. Hierdurch wird die Reinigungswirkung des Saugroboters zusätzlich erhöht. Dabei ist vorzugsweise vorgesehen, dass das jeweilige Bürstenelement aus einer Vielzahl von Filamenten gebildet ist, die zu einem Bürstenelement zusammengefasst sind.Another embodiment of the invention provides that the at least one brush element of the main brush, preferably a plurality of brush elements of the main brush, are formed by tufts of bristles. This also increases the cleaning effect of the robot vacuum cleaner. It is preferably provided that the respective brush element is formed from a plurality of filaments which are combined to form a brush element.

Dabei ist vorstellbar, dass die Filamente aus einem flexiblen Kunststoff gebildet sind, um eine Anpassung der Borstenbüschel an die jeweilige Bodenfläche sowie an die aufzunehmenden Schmutzpartikel zu ermöglichen. In einer alternativen Ausführungsform wird das mindestens eine Bürstenelement der Hauptbürste durch eine Gummilamelle gebildet. In einer weiteren alternativen Ausführungsform werden die Bürstenelemente der Hauptbürste durch mindestens eine Gummilamelle und mindestens ein Borstenbüschel gebildet.It is conceivable that the filaments are formed from a flexible plastic in order to enable the tufts of bristles to be adapted to the respective floor surface and to the dirt particles to be picked up. In an alternative embodiment, the at least one brush element of the main brush is formed by a rubber lamella. In a further alternative embodiment, the brush elements of the main brush are formed by at least one rubber lamella and at least one tuft of bristles.

Ferner ist es besonders vorteilhaft, wenn die Hilfsbürste drehantreibbar ist, wobei vorzugsweise die Hauptbürste und die Hilfsbürste in demselben Drehsinn antreibbar sind. Vorteilhafter Weise kann die Reinigungswirkung des Saugroboters hierdurch weiter erhöht werden. Insbesondere erfolgt infolge der Drehbewegung der Hilfsbürste als auch der Hauptbürste ein verbesserter Transport der Schmutzpartikel zu dem Schmutzbehälter oder Staubbeutel des Saugroboters. Ebenfalls wird die Übergabe des Grobschmutzes, welcher vorzugsweise zuerst von der Hilfsbürste eingefangen wird, zu der Hauptbürste mittels der Drehbewegung der Hilfsbürste verbessert.Furthermore, it is particularly advantageous if the auxiliary brush can be driven in rotation, the main brush and the auxiliary brush preferably being able to be driven in the same direction of rotation. The cleaning effect of the robotic vacuum cleaner can advantageously be further increased in this way. In particular, as a result of the rotary movement of the auxiliary brush and the main brush, there is an improved transport of the dirt particles to the dirt container or dust bag of the vacuum robot. The transfer of the coarse dirt, which is preferably first caught by the auxiliary brush, to the main brush is also improved by means of the rotary movement of the auxiliary brush.

Eine vorteilhafte Ausgestaltung der Erfindung sieht vor, dass die Hilfsbürste und/oder die Hauptbürste in Abhängigkeit einer Fahrgeschwindigkeit des Saugroboters antreibbar sind. Bei einer Erhöhung der Fahrgeschwindigkeit des Saugroboters wird bei einer gleichbleibenden Drehzahl der Hilfsbürste und/oder der Hauptbürste die Anzahl der Male, bei der die Hilfsbürste und/oder die Hauptbürste die Bodenfläche abstreifen bezogen auf eine zurückgelegte Fahrstrecke des Saugroboters verringert. Mittels einer Anpassung der Drehzahl der Hilfsbürste und/oder der Hauptbürste kann somit vorteilhafter Weise eine gleichbleibende Reinigungswirkung des Saugroboters über den gesamten Betrieb unabhängig von der Fahrgeschwindigkeit erzielt werden. Hierbei ist vorzugsweise vorgesehen, dass die Drehbewegung bei einer Erhöhung der Fahrgeschwindigkeit ebenfalls erhöht und bei einer Verringerung der Fahrgeschwindigkeit vermindert wird.An advantageous embodiment of the invention provides that the auxiliary brush and / or the main brush can be driven as a function of a driving speed of the robotic vacuum cleaner. When the driving speed of the robot vacuum cleaner is increased, the number of times the auxiliary brush and / or the main brush wipe the floor surface is reduced in relation to the distance covered by the robot vacuum cleaner while the speed of the auxiliary brush and / or the main brush remains the same. By adapting the speed of the auxiliary brush and / or the main brush, a constant cleaning effect of the robotic vacuum cleaner can thus advantageously be achieved over the entire operation, regardless of the driving speed. It is preferably provided here that the rotary movement is also increased when the driving speed is increased and is reduced when the driving speed is reduced.

Es ist gemäß einem weiteren Merkmal der Erfindung vorgesehen, dass durch einen Antrieb, der sowohl mit der Hauptbürste als auch mit der Hilfsbürste in Wirkverbindung steht, die Hauptbürste so wie auch die Hilfsbürste angetrieben werden. Vorteilhafter Weise wird hierdurch die Verwendung eines einzelnen Antriebs für die Drehbewegung der beiden Bürsten ermöglicht. In einer alternativen Ausführungsform ist es jedoch auch vorstellbar, dass jeder der Bürsten ein eigener Antrieb zugeordnet ist, um die beiden Bürsten unabhängig voneinander steuern zu können.According to a further feature of the invention, it is provided that the main brush and the auxiliary brush are driven by a drive which is in operative connection both with the main brush and with the auxiliary brush. This advantageously enables the use of a single drive for the rotary movement of the two brushes. In an alternative embodiment, however, it is also conceivable that each of the brushes is assigned its own drive in order to be able to control the two brushes independently of one another.

Eine weitere Ausgestaltung der Erfindung sieht eine - entgegen der Fahrtrichtung des Saugroboters betrachtet - hinter der Hauptbürste angeordnete Dichtlamelle vor, deren Wirkebene vorzugsweise mit der Wirkebene der Hauptbürste zusammenfällt. Die Dichtlamelle erfüllt hierbei zwei Funktionen: zum einen wird mittels der Dichtlamelle eine Dichtigkeit des Saugwerkes zur der Bodenfläche in einem hinteren Bereich des Saugroboters erzielt, die dazu führt, dass der Saugluftstrom nicht abgeschwächt wird und somit die Reinigungswirkung sichergestellt wird. Zum anderen wirkt die Dichtlamelle nach Art eines Kehrblechs. Hierbei schiebt die Dichtlamelle weder von der Hilfsbürste noch von der Hauptbürste aufgenommene Schmutzpartikel vor sich her, welche dann mittels Wirkung des Saugluftstroms im Bereich der Hauptbürste zu dem Schmutzbehälter befördert werden. Vorzugsweise ist dabei vorgesehen, dass die Dichtlamelle als auch die Hauptbürste auf der Bodenfläche aufliegen und somit für eine ausreichende Dichtigkeit des Saugwerks des Saugroboters sorgen.Another embodiment of the invention provides a sealing lamella arranged behind the main brush, viewed against the direction of travel of the robotic vacuum cleaner, whose plane of action preferably coincides with the plane of action of the main brush. The sealing lamella fulfills two functions: on the one hand, the sealing lamella ensures that the Achieved suction mechanism to the floor surface in a rear area of the vacuum robot, which leads to the fact that the suction air flow is not weakened and thus the cleaning effect is ensured. On the other hand, the sealing lamella acts like a dustpan. In this case, the sealing lamella does not push dirt particles picked up by the auxiliary brush or by the main brush in front of it, which are then conveyed to the dirt container by the action of the suction air flow in the area of the main brush. It is preferably provided that the sealing lamella as well as the main brush rest on the floor surface and thus ensure that the suction unit of the robot vacuum cleaner is sufficiently sealed.

Gemäß einer vorteilhaften Ausgestaltung der Erfindung ist vorgesehen, dass die Dichtlamelle von einem flexiblen Kunststoff, insbesondere von einer Gummilamelle, gebildet ist. Vorteilhafter Weise kann sich die Dichtlamelle somit an Unebenheiten der Bodenfläche anpassen. Ferner wird hierbei eine Beschädigung der Bodenfläche verhindert, welche sich beispielsweise bei der Ausbildung der Dichtlamelle in Form eines Metalls einstellen würde.According to an advantageous embodiment of the invention it is provided that the sealing lamella is formed from a flexible plastic, in particular from a rubber lamella. The sealing lamella can thus advantageously adapt to unevenness in the floor surface. Furthermore, this prevents damage to the bottom surface, which would occur, for example, if the sealing lamella were formed in the form of a metal.

Gemäß einem weiteren Merkmal der Erfindung ist vorgesehen, dass die Dichtlamelle geneigt ausgebildet ist, vorzugsweise um einen Winkel im Bereich zwischen 25° und 65°, weiter vorzugsweise um einen Winkel von 45°, gegenüber der Vertikalen. Infolge der geneigten Ausrichtung der Dichtlamelle wird die Kehrfunktion derselben zusätzlich erhöht. Es hat sich herausgestellt, dass die Dichtlamelle bei einer senkrechten Anordnung zu der Bodenfläche dazu neigt bei einer Überfahrt von Unebenheiten in der Bodenfläche umzuknicken, insbesondere, wenn die Dichtlamelle aus einem flexiblen Kunststoff gebildet ist. Folge ist eine Verringerung einer Reinigungswirkung der Dichtlamelle. Gemäß der vorstehenden Ausgestaltung ist dabei denkbar, dass die Dichtlamelle entweder derart angeordnet ist, dass die Dichtlamelle die Schmutzpartikel vor sich herschiebt oder jedoch eine solche Ausrichtung aufweist, in der die Schmutzpartikel "nachgezogen" werden. In beiden Fällen wird die Reinigungswirkung der Dichtlamelle zusätzlich verbessert und bewirkt mithin eine verbesserte Reinigung der Bodenfläche.According to a further feature of the invention it is provided that the sealing lamella is inclined, preferably at an angle in the range between 25 ° and 65 °, more preferably at an angle of 45 °, with respect to the vertical. As a result of the inclined alignment of the sealing lamella, the sweeping function of the same is additionally increased. It has been found that, if the sealing lamella is arranged perpendicular to the floor surface, it tends to buckle when driving over unevenness in the floor surface, in particular if the sealing lamella is formed from a flexible plastic. The result is a reduction in the cleaning effect of the sealing lamella. According to the above embodiment, it is conceivable that the sealing lamella is either arranged in such a way that the sealing lamella pushes the dirt particles in front of it or has such an orientation in which the dirt particles are “drawn”. In both cases, the cleaning effect of the sealing lamella is additionally improved and therefore results in an improved cleaning of the floor surface.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen rein schematisch dargestellt und wird nachfolgend näher beschrieben. Es zeigt:

Figur 1
eine perspektivische Ansicht eines Saugroboters gemäß dem Stand der Technik,
Figur 2
einen vertikalen Schnitt durch ein erfindungsgemäßes Saugwerk mit einer Hauptbürste, einer Hilfsbürste und einer Dichtlamelle sowie
Figur 3
eine perspektivische Ansicht der Hilfsbürste aus Figur 2.
An embodiment of the invention is shown purely schematically in the drawings and is described in more detail below. It shows:
Figure 1
a perspective view of a vacuum robot according to the prior art,
Figure 2
a vertical section through a suction unit according to the invention with a main brush, an auxiliary brush and a sealing lamella as well
Figure 3
a perspective view of the auxiliary brush Figure 2 .

Ein Ausführungsbeispiel, das in den Figuren 1 bis 3 gezeigt ist, umfasst einen Saugroboter 1 zur autonomen Reinigung einer Bodenfläche 22 eines Raums 23.An embodiment that is in the Figures 1 to 3 is shown, comprises a vacuum robot 1 for autonomous cleaning of a floor surface 22 of a room 23.

Figur 1 zeigt einen Saugroboter 1 gemäß dem Stand der Technik. Der Saugroboter 1 umfasst ein Gehäuse 2 mit einem runden Querschnitt. In dem Gehäuse sind ein Sauggebläse 3 zur Erzeugung eines Saugluftstroms sowie ein Schmutzbehälter 4 zur Aufnahme von Schmutzpartikeln angeordnet. An einer Unterseite 24 weist der Saugroboter 1 ferner einen Saugmund 5 auf, welcher strömungstechnisch mittels eines Saugkanals 6 mit dem Sauggebläse 3 in Verbindung steht. Ebenfalls an der Unterseite 24 angeordnet ist eine Hauptbürste 7, welche mittels eines nicht näher in den Figuren dargestellten Antriebs in eine Drehbewegung versetzt wird. Die Hauptbürste 7 erstreckt sich hierbei quer zu einer Fahrtrichtung 8 des Gehäuses 2. Bei Betrieb des Saugroboters 1 werden auf der Bodenfläche 22 befindliche Schmutzpartikel mittels der Drehbewegung der Hauptbürste 7 in Richtung des Schmutzbehälters bewegt. Diese Aigitationswirkung der Hauptbürste 7 wird durch den am Saugmund 5 vorliegenden Saugluftstrom unterstützt, welcher aufgewirbelte Staub- und Schmutzpartikel erfasst und zum Schmutzbehälter 4 befördert. Die von den Schmutzpartikeln gefilterte Saugluftströmung verlässt den Saugroboter 1 über Auslassöffnungen 28 im Gehäuse 2. Figure 1 shows a vacuum robot 1 according to the prior art. The robot vacuum cleaner 1 comprises a housing 2 with a round cross section. A suction fan 3 for generating a suction air flow and a dirt container 4 for receiving dirt particles are arranged in the housing. On an underside 24, the robot vacuum cleaner 1 also has a suction mouth 5, which is fluidically connected to the suction fan 3 by means of a suction channel 6. Also arranged on the underside 24 is a main brush 7, which is set in a rotary movement by means of a drive not shown in detail in the figures. The main brush 7 extends transversely to a direction of travel 8 of the housing 2. When the robot vacuum cleaner 1 is in operation, dirt particles on the floor surface 22 are moved in the direction of the dirt container by means of the rotary movement of the main brush 7. This agitation effect of the main brush 7 is supported by the suction air flow present at the suction mouth 5, which collects dust and dirt particles that are blown up and conveys them to the dirt container 4. The suction air flow filtered by the dirt particles leaves the robot vacuum cleaner 1 via outlet openings 28 in the housing 2.

Ein Ausführungsbeispiel eines erfindungsgemäßen Saugroboters 1 ist in den Figuren 2 und 3 gezeigt. Der erfindungsgemäße Saugroboters 1 weist, wie in Figur 2 gezeigt, ebenfalls eine Hauptbürste 7 auf. Die Hauptbürste 7 ist an einer Unterseite 24 des Saugroboters 1 angeordnet und schließt seitlich bündig mit dem Gehäuse 2 ab. Die Hauptbürste 7 ist hierbei aus einem Bürstenkörper 17 und einer Mehrzahl von Bürstenelementen 13 gebildet, welche äquidistant über einen Umfang des Bürstenkörpers 17 verteilt angeordnet sind. Dabei sind die einzelnen Bürstenelemente 13 von einzelnen Borstenbüscheln aus einem flexiblen Kunststoff gebildet.An embodiment of a robot vacuum cleaner 1 according to the invention is shown in Figures 2 and 3 shown. The robot vacuum cleaner 1 according to the invention has, as in Figure 2 shown, also has a main brush 7. The main brush 7 is arranged on an underside 24 of the robot vacuum cleaner 1 and ends flush with the housing 2 at the side. The main brush 7 is formed here from a brush body 17 and a plurality of brush elements 13, which are arranged equidistantly over a circumference of the brush body 17. The individual brush elements 13 are formed by individual tufts of bristles made from a flexible plastic.

Ferner weist der erfindungsgemäße Saugroboter 1 eine Hilfsbürste 9 auf, welche in Figur 3 gezeigt ist. Diese ist der Hauptbürste 7, entgegen der Fahrtrichtung 8 des Saugroboters 1 betrachtet, vorgelagert. Die Hilfsbürste 9 erstreckt sich hierbei parallel zu der Hauptbürste 7 und ist ebenfalls aus einem Bürstenkörper 19 und einer Mehrzahl von Bürstenelementen 11 gebildet. Die Bürstenelemente 11 der Hilfsbürste 9 sind jeweils in Form einer Gummilamelle, bestehend aus einem flexiblen Kunststoff, gebildet. Ein Außendurchmesser 15 der Hauptbürste 7 beträgt in etwa 43 mm, während ein Außendurchmesser 16 der Hilfsbürste 9 in etwa 24 mm beträgt. Hierbei ist eine radiale Länge 18 des Bürstenelements 11 der Hilfsbürste 9 bezogen auf den Bürstenkörper 19 derselben geringer als eine radiale Länge 25 des Bürstenelements 13 der Hauptbürste 7 auf den Bürstenkörper 17 der selbigen. Die Hauptbürste 7 und die Hilfsbürste 9 sind mittels eines gemeinsamen Antriebs drehantreibbar an dem Gehäuse gelagert und weisen denselben Drehsinn auf. Dabei ist der Drehsinn derart orientiert, dass sich die Bürstenelemente 11, 13 von einer Vorderseite des Saugroboters 1 betrachtet nach unten, also zu der Bodenfläche 22 hin, bewegen.Furthermore, the robot vacuum cleaner 1 according to the invention has an auxiliary brush 9, which is shown in FIG Figure 3 is shown. This is upstream of the main brush 7, viewed against the direction of travel 8 of the robotic vacuum cleaner 1. The auxiliary brush 9 extends parallel to the main brush 7 and is also formed from a brush body 19 and a plurality of brush elements 11. The brush elements 11 of the auxiliary brush 9 are each in the form of a rubber lamella consisting of a flexible plastic. An outer diameter 15 of the main brush 7 is approximately 43 mm, while an outer diameter 16 of the auxiliary brush 9 is approximately 24 mm. Here, a radial length 18 of the brush element 11 of the auxiliary brush 9 in relation to the brush body 19 of the same is less than a radial length 25 of the brush element 13 of the main brush 7 on the brush body 17 of the same. The main brush 7 and the auxiliary brush 9 are mounted on the housing such that they can be rotated by means of a common drive and have the same direction of rotation. The direction of rotation is oriented in such a way that the brush elements 11, 13 move downward, ie towards the floor surface 22, when viewed from a front side of the robotic vacuum cleaner 1.

Darüber hinaus weist der erfindungsgemäße Saugroboter 1 eine Dichtlamelle 20 auf, welche ebenfalls an einer Unterseite 24 des Gehäuses 2 angeordnet ist und sich über die gesamte Breite des Saugroboters 1 erstreckt. Die Dichtlamelle 20, welche in Figur 2 gezeigt ist, ist hierbei hinter der Hauptbürste 7 angeordnet und in Form einer Gummilamelle ausgebildet. Dabei ist die Dichtlamelle 20 in einem Winkel 26 von etwa 57° gegenüber einer Vertikalen an dem Gehäuse 2 ausgerichtet.In addition, the robot vacuum cleaner 1 according to the invention has a sealing lamella 20, which is also arranged on an underside 24 of the housing 2 and extends over the entire width of the robot vacuum cleaner 1. The sealing lamella 20, which in Figure 2 is shown, is here arranged behind the main brush 7 and designed in the form of a rubber lamella. The sealing lamella 20 is aligned at an angle 26 of approximately 57 ° with respect to a vertical on the housing 2.

Die Hauptbürste 7, die Hilfsbürste 9 sowie die Dichtlamelle 20 weisen jeweils eine Wirkebene 10, 12, 21 auf, innerhalb derer eine Aufnahme von Schmutzpartikeln möglich ist. Dabei wird die Wirkebene 10, 12 der Hauptbürste 7 und der Hilfsbürste 9 jeweils durch diejenige Ebene bestimmt, bis zu der sich ein zugehöriges Bürstenelement 11, 13 maximal nach unten, also in Richtung der zu reinigenden Bodenfläche 22, erstreckt. Die Wirkebene der Dichtlamelle 20 wird durch diejenige Ebene bestimmt, bis zu der sich die Dichtlamelle 20 selbst maximal nach unten erstreckt.The main brush 7, the auxiliary brush 9 and the sealing lamella 20 each have an effective plane 10, 12, 21 within which dirt particles can be picked up. The effective plane 10, 12 of the main brush 7 and the auxiliary brush 9 is each determined by the plane up to which an associated brush element 11, 13 extends maximally downward, i.e. in the direction of the floor surface 22 to be cleaned. The plane of action of the sealing lamella 20 is determined by the plane up to which the sealing lamella 20 itself extends maximally downward.

Die Hauptbürste 7 ist derart an dem Gehäuse 2 gelagert, dass die Bürstenelemente 13 auf der Bodenfläche 22 aufsetzen. Die Wirkebene 10 der Hauptbürste 7 fällt also mit der Bodenfläche 22 des Raums 23 zusammen. Die Wirkebene 12 der Hilfsbürste 9 ist in einem Abstand 14 von etwa 3 mm zu der Wirkebene 12 der Hauptbürste 7 angeordnet. Das Gehäuse 2 des Saugroboters 1 ist derart ausgeformt, dass es einer äußeren Kontur der Hilfsbürste 9 als auch der Hauptbürste 7 folgt. Um eine Aufnahme größerer Schmutzpartikel zu ermöglichen, ist das Gehäuse 2 des Saugroboters 1 in einem vorderen Bereich mit einer Eintrittsöffnung 27 versehen, die in etwa der maximalen Größe der aufzunehmenden Schmutzpartikel entspricht. Die Wirkebene 21 der Dichtlamelle 20 ist ebenfalls in einem Abstand 29 zu der Bodenfläche 22 angeordnet. Dabei ist der Abstand 29 derart gewählt, dass einerseits eine ausreichende Dichtigkeit in einem hinteren Bereich des Saugroboters 1 erzielt und somit eine Wirkung des Saugluftstroms, der von dem Sauggebläse 3 erzeugt wird, nicht verringert wird und andererseits eine Beschädigung der Bodenfläche 22 vermieden wird.The main brush 7 is mounted on the housing 2 in such a way that the brush elements 13 touch the bottom surface 22. The plane of action 10 of the main brush 7 thus coincides with the floor surface 22 of the space 23. The working plane 12 of the auxiliary brush 9 is arranged at a distance 14 of approximately 3 mm from the working plane 12 of the main brush 7. The housing 2 of the robot vacuum cleaner 1 is shaped in such a way that it follows an outer contour of the auxiliary brush 9 as well as the main brush 7. In order to enable larger dirt particles to be picked up, the housing 2 of the robot vacuum cleaner 1 is provided in a front area with an inlet opening 27 which corresponds approximately to the maximum size of the dirt particles to be picked up. The plane of action 21 of the sealing lamella 20 is also arranged at a distance 29 from the bottom surface 22. The distance 29 is selected in such a way that, on the one hand, sufficient tightness is achieved in a rear area of the robot vacuum cleaner 1 and thus the effect of the suction air flow generated by the suction fan 3 is not reduced and, on the other hand, damage to the floor surface 22 is avoided.

Bei Betrieb des Saugroboters 1 werden auf der Bodenfläche 22 befindliche Schmutzpartikel in einem ersten Schritt infolge der Drehbewegung der Hilfsbürste 9 in Richtung der Hauptbürste 7 befördert. Hierbei werden diejenigen Schmutzpartikel von der Hilfsbürste 9 eingefangen, deren Größe der Eintrittsöffnung 27 der Bodenfläche 22 entspricht. Typischerweise handelt es sich hierbei um Grobschmutz in Form von Krümeln oder Steinen. Kleinere Schmutzpartikel, insbesondere Feinstaub, werden bei einer Überfahrt des Saugroboters 1 nicht von der Hilfsbürste 9, jedoch mittels Wirkung des Saugluftstroms an der Eintrittsöffnung 27 erfasst. Die von der Hilfsbürste 9 in Richtung der Hauptbürste 7 transportierten Schmutzpartikel werden anschließend von der Hauptbürste 7 erfasst. Infolge der Drehbewegung der Hauptbürste 7 werden die Schmutzpartikel mobilisiert und mittels der Saugluftströmung zu dem Schmutzbehälter 4 geleitet. Schmutzpartikel, welche weder von der Hilfsbürste 9 noch von der Hauptbürste 7 erfasst wurden oder auch solche, welche nicht unmittelbar von der Saugluftströmung erfasst wurden, werden von der Dichtlamelle 20 zurückgehalten. Dabei wirkt die Dichtlamelle 20 nach Art eines Kehrblechs und ermöglicht somit eine zusätzliche Aufnahme der Schmutzpartikel. Ferner wirkt die Dichtlamelle 20 abdichtend für den hinteren Bereich des Saugroboters 1. Der vordere Bereich des Saugroboters 1 wird mittels der Hilfsbürste 9 weitestgehend dichtend gegen die Bodenfläche 22 abgeschirmt. Hierdurch wird sichergestellt, dass die von dem Sauggebläse 3 erzeugte Saugluftströmung nicht verringert wird und somit eine bestmögliche Reinigungsleistung des Saugroboters 1 sichergestellt wird, während gleichzeitig eine Aufnahme von verschiedenartiger Schmutzpartikel, insbesondere von Feinstaub und Grobschmutz gleichermaßen, ermöglicht wird.When the robot vacuum cleaner 1 is in operation, dirt particles located on the floor surface 22 are conveyed in a first step as a result of the rotary movement of the auxiliary brush 9 in the direction of the main brush 7. In this case, those dirt particles are captured by the auxiliary brush 9, the size of which corresponds to the inlet opening 27 of the floor surface 22. Typically, this is coarse dirt in the form of crumbs or stones. Smaller dirt particles, in particular fine dust, are not captured by the auxiliary brush 9 when the robotic vacuum cleaner 1 passes over them, but are captured by the action of the suction air flow at the inlet opening 27. The dirt particles transported by the auxiliary brush 9 in the direction of the main brush 7 are then picked up by the main brush 7. As a result of the rotary movement of the main brush 7, the dirt particles are mobilized and by means of the suction air flow to the Dirt container 4 passed. Dirt particles which have not been caught by either the auxiliary brush 9 or the main brush 7, or also those which have not been caught directly by the suction air flow, are held back by the sealing lamella 20. The sealing lamella 20 acts in the manner of a dustpan and thus enables additional absorption of the dirt particles. Furthermore, the sealing lamella 20 has a sealing effect for the rear area of the robot vacuum cleaner 1. The front area of the robot vacuum cleaner 1 is largely sealed off from the floor surface 22 by means of the auxiliary brush 9. This ensures that the suction air flow generated by the suction fan 3 is not reduced and thus the best possible cleaning performance of the robotic vacuum cleaner 1 is ensured, while at the same time picking up different types of dirt particles, in particular fine dust and coarse dirt, is equally possible.

BezugszeichenlisteList of reference symbols

11
SaugroboterVacuum robot
22
Gehäusecasing
33
SauggebläseSuction fan
44th
SchmutzbehälterDirt container
55
SaugmundSuction mouth
66th
SaugkanalSuction channel
77th
HauptbürsteMain brush
88th
FahrtrichtungDirection of travel
99
HilfsbürsteAuxiliary brush
1010
WirkebeneEffective plane
1111
BürstenelementBrush element
1212th
WirkebeneEffective plane
1313th
BürstenelementBrush element
1414th
Abstanddistance
1515th
Außendurchmesserouter diameter
1616
Außendurchmesserouter diameter
1717th
BürstenkörperBrush body
1818th
Längelength
1919th
BürstenkörperBrush body
2020th
DichtlamelleSealing lamella
2121
WirkebeneEffective plane
2222nd
BodenflächeFloor area
2323
Raumroom
2424
Unterseitebottom
2525th
Längelength
2626th
Winkelangle
2727
EintrittsöffnungInlet opening
2828
AuslassöffnungOutlet opening
2929
Abstanddistance

Claims (15)

Saugroboter (1) zur autonomen Reinigung von Bodenflächen (22) eines Raums (23), umfassend - ein Gehäuse (2), - ein in dem Gehäuse (2) angeordnetes Sauggebläse (3) zur Erzeugung eines Saugluftstroms, - einen in dem Gehäuse (2) angeordneten Schmutzbehälter (4) zur Aufnahme von Schmutzpartikeln, - ein Saugmund (5), - einen Saugkanal (6) zur strömungstechnischen Verbindung des Saugmundes (5) mit dem Sauggebläse (3) sowie - eine an dem Gehäuse (2) angeordnete, drehantreibbare Hauptbürste (7), wobei Schmutzpartikel mittels Wirkung des Saugluftstroms an Saugmund (5) von der Bodenfläche (22) aufnehmbar und mittels des Saugkanals (6) zu dem Schmutzbehälter (4) leitbar sind,
wobei sich die Hauptbürste (7) quer zu einer Fahrtrichtung (8) des Gehäuses (2) erstreckt,
gekennzeichnet durch
eine Hilfsbürste (9), die - entgegen der Fahrtrichtung (8) des Saugroboters (1) betrachtet - der Hauptbürste (7) vorgelagert ist und sich parallel zu der Hauptbürste (7) erstreckt,
wobei die Hilfsbürste (9) derart relativ zu der Hauptbürste (7) angeordnet ist, dass eine horizontale Wirkebene (12) der Hilfsbürste (9), bis zu der sich ein Bürstenelement (11) der Hilfsbürste (9) maximal nach unten erstreckt, vertikal oberhalb einer horizontalen Wirkebene (10) der Hauptbürste (7) angeordnet ist, bis zu der sich ein Bürstenelement (13) der Hauptbürste (7) maximal nach unten erstreckt, sodass die Wirkebenen (10, 12) in einem Abstand (14) voneinander angeordnet sind.A vacuum robot (1) for the autonomous cleaning of floor surfaces (22) in a room (23), comprising - a housing (2), - A suction fan (3) arranged in the housing (2) for generating a suction air flow, - A dirt container (4) arranged in the housing (2) for receiving dirt particles, - a suction mouth (5), - A suction channel (6) for the fluidic connection of the suction mouth (5) with the suction fan (3) and - A rotatable main brush (7) arranged on the housing (2), where dirt particles can be picked up by the bottom surface (22) by means of the suction air flow at the suction mouth (5) and can be guided to the dirt container (4) by means of the suction channel (6),
wherein the main brush (7) extends transversely to a direction of travel (8) of the housing (2),
marked by
an auxiliary brush (9) which - viewed against the direction of travel (8) of the robotic vacuum cleaner (1) - is located in front of the main brush (7) and extends parallel to the main brush (7),
wherein the auxiliary brush (9) is arranged relative to the main brush (7) in such a way that a horizontal working plane (12) of the auxiliary brush (9), up to which a brush element (11) of the auxiliary brush (9) extends maximally downward, is vertical The main brush (7) is arranged above a horizontal working plane (10), up to which a brush element (13) of the main brush (7) extends maximally downwards, so that the working planes (10, 12) are arranged at a distance (14) from one another are. Saugroboter (1) nach Anspruch 1, dadurch gekennzeichnet, dass der Abstand (14) zwischen den Wirkebenen (10, 12) maximal 5 mm, vorzugsweise maximal 3 mm, weiter vorzugsweise maximal 1,5 mm, beträgt.Robot vacuum cleaner (1) according to Claim 1, characterized in that the distance (14) between the working planes (10, 12) is a maximum of 5 mm, preferably a maximum of 3 mm, more preferably a maximum of 1.5 mm. Saugroboter (1) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass mindestens ein Bürstenelement (11), vorzugsweise sämtliche Bürstenelemente (11), der Hilfsbürste (9) eine geringere radiale Länge (18) bezogen auf einen Bürstenkörper (19) der Hilfsbürste (9) aufweisen als mindestens ein Bürstenelement (13), vorzugsweise sämtliche Bürstenelemente (13), der Hauptbürste (7) bezogen auf einen Bürstenkörper (17) der Hauptbürste (7).Robot vacuum cleaner (1) according to Claim 1 or 2, characterized in that at least one brush element (11), preferably all of the brush elements (11), of the auxiliary brush (9) have a smaller radial length (18) in relation to a brush body (19) of the auxiliary brush (9) than at least one brush element (13), preferably all brush elements (13), of the main brush (7) in relation to a brush body (17) of the main brush ( 7). Saugroboter (1) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass ein Außendurchmesser (16) der Hilfsbürste (9) kleiner ist als ein Außendurchmesser (15) der Hauptbürste (7).Robot vacuum cleaner (1) according to one of Claims 1 to 3, characterized in that an outer diameter (16) of the auxiliary brush (9) is smaller than an outer diameter (15) of the main brush (7). Saugroboter (1) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass ein Außendurchmesser (15) der Hauptbürste (7) zwischen 30 mm und 50 mm, vorzugsweise zwischen 35 mm und 45 mm, weiter vorzugsweise zwischen 38 mm und 42 mm, beträgt.Robot vacuum cleaner (1) according to one of claims 1 to 4, characterized in that an outer diameter (15) of the main brush (7) is between 30 mm and 50 mm, preferably between 35 mm and 45 mm, more preferably between 38 mm and 42 mm, amounts to. Saugroboter (1) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass ein Außendurchmesser (16) der Hilfsbürste (9) zwischen 15 mm und 40 mm, vorzugsweise zwischen 18 mm und 27 mm, weiter vorzugsweise zwischen 20 mm und 25 mm, beträgt.Robot vacuum cleaner (1) according to one of claims 1 to 5, characterized in that an outer diameter (16) of the auxiliary brush (9) is between 15 mm and 40 mm, preferably between 18 mm and 27 mm, more preferably between 20 mm and 25 mm, amounts to. Saugroboter (1) nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Hilfsbürste (9) eine Mehrzahl von Bürstenelementen (11) aufweist, die vorzugsweise äquidistant über einen Umfang des zugeordneten Bürstenkörpers (19) verteilt angeordnet sind.Robot vacuum cleaner (1) according to one of Claims 1 to 6, characterized in that the auxiliary brush (9) has a plurality of brush elements (11) which are preferably arranged equidistantly over a circumference of the associated brush body (19). Saugroboter (1) nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das mindestens ein Bürstenelement (11) der Hilfsbürste (9) von einem flexiblen Kunststoff, insbesondere in Form einer Gummilamelle, gebildet ist.Robot vacuum cleaner (1) according to one of Claims 1 to 7, characterized in that the at least one brush element (11) of the auxiliary brush (9) is formed from a flexible plastic, in particular in the form of a rubber lamella. Saugroboter (1) nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass das mindestens ein Bürstenelement (13) der Hauptbürste (7), vorzugsweise eine Vielzahl von Bürstenelementen (13) der Hauptbürste (7), von Borstenbüscheln gebildet sind.Robot vacuum cleaner (1) according to one of Claims 1 to 8, characterized in that the at least one brush element (13) of the main brush (7), preferably a plurality of brush elements (13) of the main brush (7), are formed by tufts of bristles. Saugroboter (1) nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Hilfsbürste (9) drehantreibbar ist, wobei vorzugsweise die Hauptbürste (7) und die Hilfsbürste (9) in demselben Drehsinn antreibbar sind.Robot vacuum cleaner (1) according to one of Claims 1 to 9, characterized in that the auxiliary brush (9) can be driven in rotation, the main brush (7) and the auxiliary brush (9) preferably being driven in the same direction of rotation. Saugroboter (1) nach Anspruch 10, dadurch gekennzeichnet, dass die Hilfsbürste (9) und/oder die Hauptbürste (7) in Abhängigkeit einer Fahrgeschwindigkeit des Saugroboters (1) antreibbar sind.Robot vacuum cleaner (1) according to Claim 10, characterized in that the auxiliary brush (9) and / or the main brush (7) can be driven as a function of a travel speed of the robot vacuum cleaner (1). Saugroboter (1) nach Anspruch 10 oder 11, gekennzeichnet durch einen Antrieb (21), der sowohl mit der Hauptbürste (7) als auch mit der Hilfsbürste (9) in Wirkverbindung steht.Robot vacuum cleaner (1) according to Claim 10 or 11, characterized by a drive (21) which is in operative connection both with the main brush (7) and with the auxiliary brush (9). Saugroboter (1) nach einem der Ansprüche 1 bis 12, gekennzeichnet durch eine - entgegen der Fahrtrichtung (8) des Saugroboters (1) betrachtet - hinter der Hauptbürste (7) angeordneten Dichtlamelle (20), deren Wirkebene (21) vorzugsweise mit der Wirkebene (10) der Hauptbürste (7) zusammenfällt.Robot vacuum cleaner (1) according to one of Claims 1 to 12, characterized by a sealing lamella (20) arranged behind the main brush (7), viewed against the direction of travel (8) of the robot vacuum cleaner (1), whose plane of action (21) preferably coincides with the plane of action (10) of the main brush (7) collapses. Saugroboter (1) nach Anspruch 13, dadurch gekennzeichnet, dass die Dichtlamelle (20) von einem flexiblen Kunststoff, insbesondere von einer Gummilamelle, gebildet ist.Robot vacuum cleaner (1) according to Claim 13, characterized in that the sealing lamella (20) is formed from a flexible plastic, in particular from a rubber lamella. Saugroboter (1) nach Anspruch 13 oder 14, dadurch gekennzeichnet, dass die Dichtlamelle (20) geneigt ausgebildet ist, vorzugsweise um einen Winkel (26) im Bereich zwischen 25° und 65°, weiter vorzugsweise um einen Winkel (26) von 45°, gegenüber der Vertikalen.Robot vacuum cleaner (1) according to claim 13 or 14, characterized in that the sealing lamella (20) is inclined, preferably at an angle (26) in the range between 25 ° and 65 °, more preferably at an angle (26) of 45 ° , opposite the vertical.
EP20196799.9A 2019-10-18 2020-09-18 Vacuum cleaning robot for autonomous cleaning of floor surfaces of a room Active EP3808241B1 (en)

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US7571511B2 (en) * 2002-01-03 2009-08-11 Irobot Corporation Autonomous floor-cleaning robot
DE102016124901A1 (en) * 2016-12-20 2018-06-21 Miele & Cie. Kg Method and control device for operating a robotic vacuum cleaner and robotic vacuum cleaner

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DE112012001933T5 (en) * 2011-04-29 2014-05-15 Irobot Corp. robotic vacuum cleaners
DE102014103686A1 (en) * 2014-03-18 2015-09-24 Miele & Cie. Kg Floor care device with a front and a rear suction mouth
WO2017070492A1 (en) * 2015-10-21 2017-04-27 Sharkninja Operating Llc Surface cleaning head with dual rotating agitators

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