EP2395894A1 - Dispositif de nettoyage à brosses rotatives - Google Patents

Dispositif de nettoyage à brosses rotatives

Info

Publication number
EP2395894A1
EP2395894A1 EP09787354A EP09787354A EP2395894A1 EP 2395894 A1 EP2395894 A1 EP 2395894A1 EP 09787354 A EP09787354 A EP 09787354A EP 09787354 A EP09787354 A EP 09787354A EP 2395894 A1 EP2395894 A1 EP 2395894A1
Authority
EP
European Patent Office
Prior art keywords
cleaning device
brush
deflector
bristles
cleaned
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
EP09787354A
Other languages
German (de)
English (en)
Other versions
EP2395894B1 (fr
Inventor
Bastiaan J. De Wit
Freddy Moes
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Priority to EP09787354.1A priority Critical patent/EP2395894B1/fr
Publication of EP2395894A1 publication Critical patent/EP2395894A1/fr
Application granted granted Critical
Publication of EP2395894B1 publication Critical patent/EP2395894B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/28—Floor-scrubbing machines, motor-driven
    • A47L11/282—Floor-scrubbing machines, motor-driven having rotary tools
    • 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
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/32—Carpet-sweepers
    • A47L11/33—Carpet-sweepers having means for storing dirt
    • 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
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40—Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/4036—Parts or details of the surface treating tools
    • A47L11/4041—Roll shaped surface treating tools
    • 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
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40—Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/4077—Skirts or splash guards

Definitions

  • the invention relates to a cleaning device for cleaning a surface, the cleaning device comprises at least one brush rotatable in a rotation direction and movable over the surface to be cleaned and at least one deflector contacting the bristles of the brush at a location, seen in the rotation direction, before the location where the bristles contact the surface to be cleaned.
  • the invention also relates to a vacuum cleaner.
  • a rotatable brush is being used to aid in the loosening and removal of dirt and foreign material from the surface to be cleaned.
  • the brush is pressed against the surface.
  • a cleaning liquid is being used. The cleaning liquid is removed from the surface by means of the rotating brush, together with the dirt.
  • Droplets of the cleaning liquid on the inside of the housing of the brush are guided back to the brush by means of the deflector.
  • the deflector must be pressed firmly against the brush. This has the disadvantage that the power needed to rotate the brush is increased and brush wear will be more.
  • the deflector is not sufficiently pressed against the brush, droplets will fall back to the surface, which will negatively effects the cleaning result.
  • Both the deflector and the bristles of the brush will be moved when getting in contact with each other when the brush is being rotated. If the brush is worn or deformed, the deflector is will still keep in touch with the brush, although in this situation the deflector will be moved less. In case that the diameter of the brush is larger than expected, for example due to production tolerances, the deflector will be moved more.
  • the deflector can be used for preventing droplets of water or cleaning liquid from falling back on the cleaned surface.
  • the cleaning device is also suitable for cleaning without cleaning liquid.
  • the bristles are pressed together by the deflector, whereby air will be pushed out of the area between the bristles. Between the deflector and the surface to be cleaned, the bristles will be moved apart and the area between the bristles will increase so that air will be sucked into the brush. Because the air is sucked into the brush close to the position where the brush is pressed together by the surface to be cleaned, the blowing of air caused by the surface to be cleaned is compensated for. Also in this case, an optimal balance between a sufficient contact with the brush to create suction and a minimum power dissipation by the motor due to the contact between the brush and the deflector can be obtained.
  • the deflector itself can be relatively stiff and be mounted by means of springs to the housing of the brush or the deflector can be flexible and be moved with respect to the brush by being bent.
  • the deflector comprises at least one flexible plate-shaped element being bendable against spring force of the plate-shaped element.
  • Such a deflector is relatively cheap and can easily be mounted to the housing.
  • the plate-shaped element can be made of a plastic like silicon rubber, a polymer or any other suitable material like natural rubber.
  • a further embodiment of the cleaning device according to the invention is characterized in that the stiffness of the deflector is less than 200*10 3 N/mm, preferably 20* 10 3 N/mm and more preferably 2* 10 3 N/mm per millimetre length of the brush.
  • the deflector extends relatively far into the brush, for example 2 mm or more, when the brush is not rotated so that a good contact between the deflector and brush during rotation is ensured, whereby nearly no wear of the brush due to the contact with the deflector will occur and the power dissipation of the motor due to this contact will be relatively low.
  • the deflector is very elastic, and has a stiffness of less than 2* 10 " N/mm per millimetre length of the brush. At a brush with a length of 250 mm, the total stiffness is 2*10 ⁇ 3 N/mm * 250 mm is 0,5 N/mm.
  • the stiffness of the deflector can be determined, for example, by exerting a bending force, i.e. a force having the effect that the deflector is subjected to a bending deformation, on the end of the deflector extending in normal use into the brush until the end has moved 1 mm.
  • a bending force i.e. a force having the effect that the deflector is subjected to a bending deformation
  • Another embodiment of the cleaning device according to the invention is characterized in that the bristles are bent by the deflector to an extend that suction between the bristles when losing contact with the deflector is larger than expellation of air from between the bristles when contacting the surface to be cleaned.
  • the axle of the brush is kept at a certain predetermined distance from the surface, for example by means of wheels connected to a housing of the cleaning device.
  • Another embodiment of the cleaning device according to the invention is characterized in that the bending of the bristles by the deflector is larger than the bending of the bristles by the surface to be cleaned.
  • a further embodiment of the cleaning device according to the invention is characterized in that the cleaning device comprises at least two brushes rotatable in opposite directions directed towards each other at the surface to be cleaned, whereby at least two deflectors are provided pressing against the bristles of the brushes, each deflector is located on a side of a brush remote from the other brush. Due to the two brushes rotating in opposite direction a very effective cleaning operation is obtained since each location on the surface to be cleaned will be contacted by both brushes. Furthermore the dirt will be collected between the brushes and can easily be moved in an upwards direction to a debris collecting chamber.
  • a further embodiment of the cleaning device is characterized in that the deflector is adjustable with respect to the brush. In this manner the pressure between the deflector and the brush can be varied. Moreover one can compensate for possible wear of the bristles.
  • an embodiment of the cleaning device according to the invention is characterized in that the cleaning device is provided with at least one side deflector pressing against the bristles of the brush located near an end of the brush.
  • Water inside the housing of the cleaning device will fall either on the deflector or on the side deflector and will be guided back into the brush. No stripes or droplets will occur on the cleaned surface. If droplets on the surface will occur, this will be an indication that the brushes have been worn and should be replaced by new fresh brushes.
  • Fig. 1 is a side view of a rotatable brush according to the prior art
  • Fig. 2 is a perspective view of a cleaning device according to the invention
  • Fig. 3 is a schematic side view of a part of the cleaning device as shown in Fig. 2
  • Figs. 4A and 4B are respectively a schematic side view of a brush with a deflector according to the invention and a graph indicating the volume between the bristles of the brush while rotating the brush,
  • Figs. 5A and 5B are a schematic side view and bottom view of the cleaning device according to the invention
  • Figs. 6-8 are bottom views of the several other embodiments of the deflectors according to the invention.
  • Figs. 9-11 are perspective views of other embodiments of the deflector according to the invention.
  • Fig. 1 is a side view of a rotatable brush according to the prior art.
  • air will be expelled from the rotating brush in the direction indicated by arrow Pl when contact is made at position A with the surface to be cleaned.
  • the air will be expelled from the brush from the position A to position B.
  • From position B air will be sucked in a direction indicated by arrow P2 into the brush to compensate for the increasing volume between the bristles, until the bristles have lost contact with the surface (position C).
  • the airflow in the direction indicated by arrow P2 towards the brush aids the cleaning action of the brush.
  • the airflow in the direction indicated by arrow Pl away from the brush is detrimental to the cleaning action since dirt will be blown away.
  • Fig. 2 shows a perspective view of a cleaning device 1 according to the invention, comprising a housing 2 in which two brushes 3, 4 are rotatably mounted around axles 5, 6.
  • the brushes 3, 4 are driven by a motor (not shown).
  • the motor might be located on any suitable position whereby via gears of belts the brushes 3, 4 are being rotated with a speed of 5000-10,000 rotations per minute.
  • the axle of the motor can also be directly connected to the axle of the brush, whereby the motor can be placed inside the brush, for example.
  • the diameter of the brushes for example is 4 cm a 6 cm.
  • the length of the brush is for example about 25 cm.
  • Brush 3 is rotatable in a clockwise direction, indicated by arrow P3 and brush 4 is rotatable in a counter clockwise direction, indicated by arrow P4 around the respective axles 5, 6.
  • the housing 2 is provided with wheels (not shown) keeping the axles 5, 6 at a predetermined distance of the surface to be cleaned.
  • the housing 2 is connected via a steering joint to a stick 7 which is provided on a side remote of the housing 2 with a handle 8.
  • the cleaning device 1 is furthermore provided with a tank 9 for water or other cleaning liquid.
  • a power cord 10 enters the handle 8 and is guided through the stick 7 to the motor for rotating the brushes 3, 4 and the device (not shown) for feeding water from the container 9 into a brush from which it is spread on to the surface to be cleaned.
  • the housing 2 comprises a debris collecting chamber 11, the entrance 12 of which is located between the brushes 3, 4.
  • the brushes 3, 4 are fully enclosed except at the bottom by the housing 2.
  • the side cover has been removed.
  • two longitudinal flexible deflectors 13, 14 are provided extending parallel to the axles 5, 6 and partly into the brushes 3, 4.
  • the function of the deflectors 13, 14 will now be explained with reference to the drawings 3, 4A and 4B.
  • the brushes 3, 4 rotate in opposite directions P3, P4, which directions are directed towards each other near the surface to be cleaned 16.
  • the bristles 17 of the brushes 3, 4 rub over the surface to be cleaned 16 and the dirt and other materials are being disconnected from the surface to be cleaned 16 and are being moved upwards in the direction of arrow P5 into the entrance 12 of the debris collecting chamber 11.
  • the bristles 17 of the brushes 3, 4 reach the deflectors 13, 14 the bristles 17 are pressed together whereby the volume between the bristles is being reduced.
  • air is being expelled from the brushes 3, 4, which air is guided along the walls 18 of the housing 2.
  • the bristles 17 lose contact with the deflectors 13, 14 whereby the area between the bristles is being enlarged and air will be sucked into the brushes 3, 4.
  • the net air flow between the deflectors 13, 14 and the surface to be cleaned 16 is in the directions indicated by the arrows P6, P7 towards the brushes 3, 4 respectively.
  • Such a net air intake by the brushes 3, 4 will for example occur if the bending of the brushes 3, 4 by the deflectors 13, 14 is greater than the bending of the brushes 3, 4 by the surface to be cleaned 16.
  • the bending by the deflectors 13, 14 of the brushes 3, 4 is for example 5 mm while the surface to be cleaned 16 bends the brushes 3, 4 for example only 3 mm.
  • the deflectors press against the bristles of the brush at a location before the location where the bristles contact the surface to be cleaned as seen in the direction of rotation.
  • Fig. 4B shows a graph whereby the volume between the bristles 17 is indicated at different angles ⁇ .
  • air is blowing in the direction indicated by arrow P8 along the walls 18 of the housing 2.
  • the cleaning device 1 can be used for cleaning soft surfaces with carpet and hard surfaces. It can be used by only rotating the brushes 3, 4 but the cleaning can be supported by sucking vacuum by means of vacuum device in the entrance 12. Furthermore the device 1 can be used for wet cleaning of for example hard surfaces whereby water or a cleaning liquid is guided from the container 9 towards the brushes 3, 4 and the surface 16 is being wetted by the brushes 3, 4. It is also possible to spray water on the surface by means of a separate device in which case the cleaning device need not to be provided with a container 9. It is important that as little as possible water or cleaning liquid remains on the surface 16. The water or cleaning liquid will be removed by the brushes 3, 4 and guided into the entrance 12 towards the debris collecting chamber 11. As can be seen in fig.
  • the bottom plate 21 can be made from flexible plastic being easily bendable. To prevent water droplets 19 to fall back on the surface 16 near ends 20 of the cylindrical brushes 3, 4 the bottom plate 21 comprises side edges 22, whereby the distance between opposite side- edges 22 is shorter than the length of the brush 3,4. Water droplets 19 will either be guided by the side edges 22 of the bottom plate 21 towards a V-shaped nose 23 from which the droplets 19 will fall between the brushes 3, 4 and will be picked up by the brushes 3, 4 during a next passage of the brushes 3, 4 or the droplets will be picked up by the brushes when moving towards the V-shaped nose 23.
  • the V-shaped nose 23 can also be another kind of protruding element. Fig.
  • each deflector 13, 14 is connected to a carrier 32, 33 respectively.
  • the carriers 32, 33 are connected to each other at their side edges by means of adjusting mechanisms 34.
  • Each adjusting mechanism 34 comprises a rod 35 and an adjusting knob 36 whereby by rotating the adjusting knob 36 in or opposite to a direction indicated by arrows P9, PlO the deflectors 13, 14 will be moved apart or towards each other in the direction indicated by the double arrow PI l.
  • the pressure exerted on the brushes 3, 4 can be amended depending on the desired amount by which the bristles are pressed together. If the bristles are firmly pressed together no unwanted blowing will occur.
  • FIG. 7 shows another embodiment of the cleaning device 41 according to the invention whereby the carriers 32, 33 of the deflectors 13, 14 are connected near the side edges by means of springs 42. These springs 42 will determine the force by means of which the deflectors 13, 14 are pressed against the brushes 3, 4.
  • the deflectors 13, 14 can be moved towards each other in the directions indicated by arrows P 12, Pl 3 under the influence of the forces exerted by the springs 42 or can be moved apart against the forces exerted by the springs 42.
  • Fig. 8 shows a further embodiment of a device 51 according to the invention whereby the deflectors 52, 53 are being made of flexible elements 52, 53 which can accommodate the differences in the diameter of the brushes 3, 4 according to for example production tolerances.
  • the flexible elements 52,53 can be made of silicon rubber, EPDM or any other flexible polymer or material with desired mechanical and chemical properties.
  • Fig. 9 shows another embodiment of a deflector 61 of a cleaning device according to the invention which deflector 61 comprises a holder 62 which is connected with the housing 2 of the cleaning device 1 and flexible pens 63 extending parallel to each other.
  • the pens 63 are pressed against the brushes 3, 4 with their ends remote from the holder 62.
  • the deflector 61 will only function to prevent water being dropped back on the surface to be cleaned 16 or also for preventing unwanted blowing.
  • Fig. 10 shows another embodiment of a deflector 71 according to the invention whereby a holder 72 is provided with flexible wires 73 along which water is guided back to the brushes 3, 4. If the distance between the wires 73 is relatively small and the wires are stiff enough, the wires 73 will also diminish the unwanted blowing.
  • Fig. 11 shows an embodiment of a deflector 81 according to the invention whereby a holder 82 is provided with rigid pens 83. The deflector 81 will be mounted by means of a spring to the housing. Also this flexible deflector 81 will prevent the dripping of water and will diminish the unwanted blowing.
  • the bottom plate 21 and the deflectors 13, 14 can be made from any suitable material like metal or plastic.
  • the deflectors 13, 14 can be formed as a strip connected to or integrated with the housing 2.
  • flexible deflectors are filaments like yarns, arranged like a comb, adjacent individual segments from flexible material like thin spring metal sheet or plastic sheet, fabrics, grids or meshes etcetera. It is possible to make the distance between the surface and the axles of the brushes 3, 4 adjustable to be able to amend the amount by which the bristles are pressed together. Preferably also the deflector is adjustable with respect to the brush to adjust the pressure between the deflector and the brush. It is also possible to suck the debris and water away from the entrance 12 by means of a vacuum system.
  • any kind of fibre, hair, wire-shaped element or other kind of element is suitable which will be pressed together when contacting a surface to be cleaned.
  • the deflector does not press firmly enough against the bristles of the brushes, the airflow away from the brush might also be prevented by means of a vacuum system. In such a case the deflector still prevents the leakage of water.
  • each deflector with a spring to the housing.
  • the forces exerted by the spring can be in vertical direction, horizontal direction or a combination thereof.

Landscapes

  • Nozzles For Electric Vacuum Cleaners (AREA)
  • Cleaning In General (AREA)
  • Brushes (AREA)

Abstract

L'invention concerne un dispositif de nettoyage (1, 31, 41, 51) destiné à nettoyer une surface comportant au moins une brosse (3, 4) rotative dans un sens de la rotation et mobile sur la surface devant être nettoyée et au moins un déflecteur (13, 14, 52, 53, 71, 81) en contact avec les poils (17) de la brosse au niveau d'un emplacement, tel que l'on voit dans le sens de la rotation, avant l'emplacement où les poils entrent en contact avec la surface devant être nettoyée (16). Le déflecteur (13, 14, 52, 53, 71, 81) est mobile contre toute tension de ressort.
EP09787354.1A 2008-10-07 2009-10-05 Dispositif de nettoyage avec brosses rotatives Active EP2395894B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09787354.1A EP2395894B1 (fr) 2008-10-07 2009-10-05 Dispositif de nettoyage avec brosses rotatives

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP08166002A EP2191763A1 (fr) 2008-10-07 2008-10-07 Dispositif de nettoyage avec brosses rotatives
PCT/IB2009/054333 WO2010041184A1 (fr) 2008-10-07 2009-10-05 Dispositif de nettoyage à brosses rotatives
EP09787354.1A EP2395894B1 (fr) 2008-10-07 2009-10-05 Dispositif de nettoyage avec brosses rotatives

Publications (2)

Publication Number Publication Date
EP2395894A1 true EP2395894A1 (fr) 2011-12-21
EP2395894B1 EP2395894B1 (fr) 2013-06-05

Family

ID=40383595

Family Applications (3)

Application Number Title Priority Date Filing Date
EP08166002A Ceased EP2191763A1 (fr) 2008-10-07 2008-10-07 Dispositif de nettoyage avec brosses rotatives
EP09787355.8A Active EP2395895B1 (fr) 2008-10-07 2009-10-05 Dispositif de nettoyage avec brosses rotatives
EP09787354.1A Active EP2395894B1 (fr) 2008-10-07 2009-10-05 Dispositif de nettoyage avec brosses rotatives

Family Applications Before (2)

Application Number Title Priority Date Filing Date
EP08166002A Ceased EP2191763A1 (fr) 2008-10-07 2008-10-07 Dispositif de nettoyage avec brosses rotatives
EP09787355.8A Active EP2395895B1 (fr) 2008-10-07 2009-10-05 Dispositif de nettoyage avec brosses rotatives

Country Status (3)

Country Link
EP (3) EP2191763A1 (fr)
CA (2) CA2753157C (fr)
WO (2) WO2010041184A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3682785A1 (fr) 2019-01-16 2020-07-22 Koninklijke Philips N.V. Ustensile de nettoyage de surface

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CA2753156A1 (fr) 2010-04-15
CA2753156C (fr) 2016-11-08
CA2753157C (fr) 2017-03-14
WO2010041184A1 (fr) 2010-04-15
EP2191763A1 (fr) 2010-06-02
EP2395895A1 (fr) 2011-12-21
CA2753157A1 (fr) 2010-04-15
EP2395895B1 (fr) 2013-07-24
CA2753156F (fr) 2010-04-15
WO2010041185A1 (fr) 2010-04-15
EP2395894B1 (fr) 2013-06-05

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