EP3808241A1 - Robot d'aspiration destiné au nettoyage autonome des surfaces de sol d'une pièce - Google Patents

Robot d'aspiration destiné au nettoyage autonome des surfaces de sol d'une pièce 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)
English (en)
Other versions
EP3808241B1 (fr
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/fr
Application granted granted Critical
Publication of EP3808241B1 publication Critical patent/EP3808241B1/fr
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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)
EP20196799.9A 2019-10-18 2020-09-18 Robot d'aspiration destiné au nettoyage autonome des surfaces de sol d'une pièce Active EP3808241B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019128170.9A DE102019128170A1 (de) 2019-10-18 2019-10-18 Saugroboter zur autonomen Reinigung von Bodenflächen eines Raums

Publications (2)

Publication Number Publication Date
EP3808241A1 true EP3808241A1 (fr) 2021-04-21
EP3808241B1 EP3808241B1 (fr) 2023-05-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20196799.9A Active EP3808241B1 (fr) 2019-10-18 2020-09-18 Robot d'aspiration destiné au nettoyage autonome des surfaces de sol d'une pièce

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EP (1) EP3808241B1 (fr)
DE (1) DE102019128170A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112012001933T5 (de) * 2011-04-29 2014-05-15 Irobot Corp. Roboterstaubsauger
DE102014103686A1 (de) * 2014-03-18 2015-09-24 Miele & Cie. Kg Bodenpflegegerät mit einem vorderen und einem hinteren Saugmund
WO2017070492A1 (fr) * 2015-10-21 2017-04-27 Sharkninja Operating Llc Tête de nettoyage de surface comprenant des agitateurs rotatifs doubles

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7571511B2 (en) * 2002-01-03 2009-08-11 Irobot Corporation Autonomous floor-cleaning robot
DE102016124901A1 (de) * 2016-12-20 2018-06-21 Miele & Cie. Kg Verfahren und Steuergerät zum Betreiben eines Robotersaugers und Robotersauger

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112012001933T5 (de) * 2011-04-29 2014-05-15 Irobot Corp. Roboterstaubsauger
DE102014103686A1 (de) * 2014-03-18 2015-09-24 Miele & Cie. Kg Bodenpflegegerät mit einem vorderen und einem hinteren Saugmund
WO2017070492A1 (fr) * 2015-10-21 2017-04-27 Sharkninja Operating Llc Tête de nettoyage de surface comprenant des agitateurs rotatifs doubles

Also Published As

Publication number Publication date
EP3808241B1 (fr) 2023-05-24
DE102019128170A1 (de) 2021-04-22

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