EP2747626B1 - Reinigungsvorrichtung zur reinigung einer oberfläche mit einer bürste und rakelelement - Google Patents

Reinigungsvorrichtung zur reinigung einer oberfläche mit einer bürste und rakelelement Download PDF

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Publication number
EP2747626B1
EP2747626B1 EP12778420.5A EP12778420A EP2747626B1 EP 2747626 B1 EP2747626 B1 EP 2747626B1 EP 12778420 A EP12778420 A EP 12778420A EP 2747626 B1 EP2747626 B1 EP 2747626B1
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EP
European Patent Office
Prior art keywords
brush
liquid
elements
squeegee
nozzle arrangement
Prior art date
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Active
Application number
EP12778420.5A
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English (en)
French (fr)
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EP2747626A1 (de
Inventor
Johannes Tseard Van Der Kooi
Britt ROUMEN
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Koninklijke Philips NV
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Koninklijke Philips NV
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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
    • A47L9/0488—Combinations or arrangements of several tools, e.g. edge cleaning 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
    • A47L11/4036—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
    • 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
    • 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
    • A47L11/4044—Vacuuming or pick-up tools; Squeegees

Definitions

  • the present invention relates to a cleaning device for cleaning a surface. Further, the present invention relates to a nozzle arrangement for such a cleaning device.
  • Hard floor cleaning these days is done by first vacuuming the floor, followed by mopping it. Vacuuming removes the coarse dirt, while mopping removes the stains.
  • Appliances for the professional cleaning sector are usually specialized for big areas and perfectly flat floors. They rely on hard brushes and suction power to get water and dirt from the floor. Appliances for home use often use a combination of a hard brush and a squeegee nozzle. Like the appliances for the professional cleaning sector these products use the brush to remove stains from the floor and the squeegee in combination with an under-pressure to lift the dirt from the floor.
  • Said squeegee elements are usually realized by a flexible rubber lip that is attached to the bottom of the cleaning device and merely glides over the surface to be cleaned thereby pushing or wiping dirt particles and liquid across or off the surface to be cleaned.
  • An under-pressure usually generated by a vacuum aggregate, is used to ingest the collected dirt particles and liquid.
  • a squeegee device for a vacuum cleaner system is, for example, known from EP 0 576 174 A1 .
  • a sweeper that uses an above-mentioned combination of a brush and a squeegee is, for example, known from US 7,665,172 B1 .
  • the power floor sweeper described therein comprises a foot assembly with a motor driven primary agitator and a pair of edge agitators coupled to wheels such that manual propulsion of the sweeper rotates the wheels and thereby the edge agitators.
  • the sweeper does not include a vacuum source and is therefore not able to pick-up water from the floor to be cleaned. The performance on drying the floor is thus rather low.
  • FIG. 1 Another vacuum cleaner that is known from the prior art and also uses a combination of a rotating brush and a squeegee is known from US 4,864,682 A .
  • This vacuum cleaner comprises a self-adjusting wiper strip assembly that automatically adjusts for the type of floor surface on which the vacuum cleaner is being used.
  • the assembly used therein requires a high suction power in order to receive a satisfactory cleaning result.
  • the brush which is used in this vacuum cleaner is an agitator (also denoted as adjutator) with stiff brush hairs to agitate the floor, e.g. a carpet. These stiff hairs show a rather good scrubbing effect, which enable to use the brush particularly for removing stains.
  • the performance on drying the floor is rather low, since such an agitator is not able to lift liquid from the floor.
  • Vacuum and mop in one go devices known from the prior art often use brush elements that are actively spayed with water or a cleaning rinse in order to improve the removal of stains.
  • Such devices usually use a double squeegee element having two squeegees that are arranged on one side of the brush, as this is exemplarily shown in the attached Fig. 11 .
  • An additional vacuum source generates a suction in a channel between said double squeegee arrangement in order to remove the cleaning water from the floor again.
  • double squeegee arrangements as shown in the attached figures 11 and 12 has several further disadvantages. Due to the constant contact of the squeegees with the floor during the movement of the device, such double squeegees may generate a high scratch load to the floor. Especially when the double squeegee arrangements are used on each side of the brush, this will lead to an increased risk of inducing scratches on the floor. Furthermore, such squeegee arrangements include the disadvantage that they are not open for coarse dirt like e.g. hairs or peanuts, since coarse dirt is often entangled within the squeegees or is pushed away from the squeegees, and is thus not able to enter the suction inlet. Apart from that such double squeegee nozzles are hard to clean and do not have the ability to clean themselves.
  • a cleaning device of this kind is exemplarily known from US 1,694,937 .
  • Said document discloses a floor scrubbing machine, which is capable of picking up dirt from a floor by two cylindrical floor brushes disposed parallel and close together. These brushes rotate at high speeds, one running clockwise and the other one counterclockwise. In this way, the adjacent peripheries travelling together with a sufficiently high velocity to project the dirt vertically upwards with a considerable force in the form of a substantially flat jet.
  • a wiper or a squeegee is applied in addition to the brushes in order to dry the floor. Due to the two separate brushes and the additional squeegees the nozzle becomes also according to this solution fairly bulky, which again ends up in a non-satisfying liberty of action for the consumer.
  • EP 2 343 003 A1 also shows a cleaning device with two counter-rotating brushes, which cleaning device is optimized for hard floor wet cleaning.
  • a nozzle arrangement for a hard floor cleaning device comprising:
  • the above-mentioned object is furthermore, according to a second aspect of the present invention, achieved by a hard floor cleaning device that comprises the above-mentioned nozzle arrangement and a vacuum aggregate for generating an under-pressure in the suction area for ingesting dirt particles and liquid.
  • the present invention is based on the idea that by choosing a special combination of the density parameters of the brush elements and a realized centrifugal acceleration at the tip portions of the brush elements during their rotation the disadvantages of the above-mentioned double squeegee and double brush cleaning solutions can be overcome by applying only one single squeegee element.
  • the nozzle arrangement of the presented cleaning device comprises only a single squeegee element and only one primary brush. Because of having only one brush and one squeegee element, the nozzle thus becomes less bulky and shows an improved maneuverability.
  • the cleaning device therefore, enables to clean also narrow surfaces in an efficient way. Due to the chosen parameters, i.e. the linear mass density of the flexible brush elements with an upper limit of 150 g per 10 km and a centrifugal acceleration at the tip portions of the brush elements with a lower limit of 3,000 m/s 2 , which acceleration is realized by the drive means, it is possible to realize excellent cleaning results, wherein the surface to be cleaned is practically freed of particles and dried in one go.
  • a soft brush with flexible brush elements as presented here also has the ability to pick up water from the floor.
  • a second squeegee element is no longer needed.
  • Using the above-mentioned parameters concerning the linear mass density and the centrifugal acceleration of the brush elements has also shown to result in very good stain removing properties. Due to the flexible micro-fiber hairs that are preferably used as brush elements, dirt particles and liquid can be picked-up from the floor when the brush elements/microfiber hairs contact the floor during the rotation of the brush.
  • the ability to also pick-up liquid with a brush is mainly caused by capillary and/or other adhesive forces that occur due to the chosen linear mass density of the brush elements and the occurring high speeds with which the brush is driven. Due to the very thin microfiber hairs the brush is also open for coarse dirt.
  • the brush elements contact the floor with their tip portions and pick-up the dirt particles and the liquid from the floor during a pick-up period in which the said tip portions contact the floor.
  • the centrifugal acceleration of the tip portions of the brush elements becomes so high that the occurring centrifugal forces that appear to the dirt and liquid particles within the microfiber hairs become stronger than the adhesive forces with which the dirt and liquid particles are repressed from the brush elements.
  • the dirt and liquid particles are thus automatically released in the dirt release period when the brush elements are during their rotation inside the nozzle housing free from contact to the surface.
  • other acceleration forces can be present, particularly acceleration forces which are due to deformation of the flexible brush elements. Such deformations may exemplarily occur when the flexible brush elements contact the floor during rotation or encounter liquid or dirt particles.
  • the squeegee therefore ensures that the remaining liquid and dirt is not leaving the suction area again without being ingested by the vacuum aggregate. It therefore kind of closes the suction area for dirt and liquid on one side of the nozzle housing. Due to the chosen combination of a brush, which is, besides dirt, also able to pick-up liquid, with a single squeegee element for pushing or wiping dirt and liquid across or off the surface to be cleaned, it is thus possible to almost free the surface from dirt particles as well as from liquid. This results in improved cleaning properties and, at the same time, in a size reduction of the nozzle.
  • This suction area is an area of under-pressure that is used for ingesting the dirt and liquid particles which have been collected by either the squeegee element or the brush.
  • Said under-pressure is preferably generated by a vacuum aggregate that is in any way connected to the suction area.
  • the brush is preferably arranged at one side of the housing of the nozzle, whereas the squeegee element is arranged on another side of the housing, parallel to the brush, so that the brush and the squeegee element appear to be behind each other, when seen in the intended direction of the movement of the device.
  • the squeegee and the brush are thereto arranged on a bottom-side of the nozzle housing, which during use of the device faces the surface to be cleaned, and at least partly protrude from the nozzle housing on this bottom side.
  • the squeegee element When moving the device the squeegee element glides over the surface to be cleaned and thereby pushes or wipes dirt particles and liquid across or off the floor, while the brush, during its rotation, at same time picks-up dirt and liquid particles from the surface. In this way a suction inlet is created in between the brush and the squeegee element, which during use of the cleaning device, faces the surface to be cleaned. This suction inlet opens into the suction area, in which the above-mentioned under-pressure is created.
  • the brush elements may be made of a plastic material wherein polyester and nylon are suitable examples.
  • the linear mass density of a plurality of the brush elements is, at least at the tip portions, lower than 150 g per 10 km. This ensures that, at least the tip portions, the brush elements are flexible enough to undergo a bending effect and are able to pick-up dirt particles and liquid droplets from the surface to be cleaned.
  • the extend of wear and tear of the brush elements appears to be acceptable within this linear mass density range.
  • the linear mass density as mentioned i.e. the linear mass density in grams per 10 km, is also denoted as Dtex value.
  • the drive means are adapted to realize a centrifugal acceleration at the tip portions of at least 7,000 m/s 2 and more preferably a centrifugal acceleration of 12,000 m/s 2 .
  • the drive means are adapted to realize centrifugal accelerations of the brush elements in the above-mentioned ranges, it is likely for the liquid droplets adhering to the brush elements to be expelled as a mist of droplets during a phase in which the brush elements are free from contact to the surface to be cleaned.
  • the combination of the linear mass density of the brush elements and the acceleration at the tips of the brush elements is a combination which yields optimal cleaning performance of the rotatable brush, wherein practically all dirt particles and spilled liquid encountered by the brush are picked-up by the brush elements and expelled at a position inside the nozzle housing.
  • effective pick-up of particles and liquid is advantageous when it comes to cleaning, wherein both a dirt removal and a drying process are realized at the same time.
  • An effective subsequent expelling process is advantageous in view of the fact that a re-introduction of dirt and/or liquid to the surface to be cleaned is avoided.
  • the under-pressure generated by the vacuum aggregate is in a range of 3 to 70 mbar, preferably in a range of 4 to 50 mbar, most preferably in a range of 5 to 30 mbar.
  • State of the art vacuum cleaners need to apply higher under-pressures in order to receive acceptable cleaning results.
  • very good cleaning results may already be realized in the above-mentioned pressure ranges.
  • smaller vacuum aggregates may be used. This increases the freedom in the selection of the vacuum pump.
  • the brush axis and/or the longitudinal direction of the squeegee element is arranged transverse, preferably perpendicular to the intended direction of movement of the cleaning device. During the movement of the device the brush and the squeegee are therefore able to encounter dirt and liquid particles along their complete longitudinal sides.
  • the brush axis and the squeegee element parallel to each other, a perfect collaboration of the brush and the squeegee element is established for picking-up dirt and liquid particles from the floor.
  • a suction area of under-pressure is defined in between the squeegee element and the brush, which also substantially extends parallel to the brush axis.
  • said squeegee element comprises switching means for switching the squeegee element to a closed position, in which the squeegee element is adapted to push or wipe dirt particles and liquid across or off the surface to be cleaned, when the cleaning device is moved on the surface in a forward direction in which the squeegee element is, seen in the direction of movement of the cleaning device, located behind the brush, and for switching the squeegee element to an open position in which dirt particles and liquid from the floor can enter the suction area through an opening between the squeegee element and the surface to be cleaned, when the cleaning device is moved on the surface in a backward direction in which the squeegee element is, seen in the direction of movement of the cleaning device, located in front of the brush.
  • the ability to switch the squeegee element from an open to a close position depending on the movement direction of the cleaning device enables a good cleaning result in a forward as well as in a backward stroke of the nozzle.
  • the open configuration is in order to allow the dirt to enter when the squeegee approaches dirt and liquid on the floor before the brush.
  • the squeegee closes the gap to the floor, or in other words wipes or glides over the floor, when the brush approaches the dirt or liquid on the floor before the squeegee.
  • the squeegee element is preferably realized by a flexible rubber lip that, depending on the movement direction of the cleaning device, is adapted to flex about the longitudinal direction of said rubber lip.
  • This rubber lip preferably comprises at least one stud which is arranged near the lower end of the rubber lip, where the rubber lip is intended to touch the surface to be cleaned.
  • Said at least one stud is being adapted to at least partly lift the rubber lip from the surface, when the cleaning device is moved on the surface in a backward direction, in which the rubber lip is, seen in the direction of movement of the cleaning device, located in front of the brush.
  • the nozzle arrangement comprises a housing that at least partly surrounds the brush, wherein the squeegee element is attached to said housing.
  • the brush is at least partly surrounded by the nozzle housing and protrudes at least partially from a bottom side of said nozzle housing, which, during use of the device, faces the surface to be cleaned, so that the brush elements contact said surface outside of the housing during the rotation of the brush.
  • the squeegee element is preferably also attached to said bottom side of the housing in order to contact the surface to be cleaned when the nozzle is moved over said surface.
  • the suction area in which the above-mentioned under-pressure is applied, is defined in the space between the brush, said housing, the squeegee element and the surface to be cleaned, wherein the suction inlet is arranged between the squeegee element and the brush.
  • the cleaning device comprises positioning means for positioning the brush axis at a distance to the surface to be cleaned that is smaller than the radius of the brush with fully outstretched brush elements to realize an indentation of the brush part contacting the surface during operation, which indentation is in a range from 2% to 12% of the brush diameter.
  • the brush elements are bent when the brush is in contact with the surface.
  • the appearance of the brush elements changes from an outstretched appearance to a bent appearance, and as soon as the brush elements loose contact with the surface during rotation of the brush, the appearance of the brush elements changes from a bent appearance to an outstretched appearance.
  • a practical range for an indentation of the brush is arranged from 2% to 12% of a diameter of the brush relating to a fully outstretched condition of the brush elements.
  • the diameter of the brush as mentioned can be determined by performing an appropriate measurement, for example, by using a high-speed camera or a stroboscope which is operated at the frequency of a rotation of the brush.
  • a deformation of the brush elements is also influenced by the linear mass density of the brush elements. Furthermore, the linear mass density of the brush elements influences the power which is needed for rotating the brush. When the linear mass density of the brush elements is relatively low, the flexibility is relatively high, and the power needed for causing the brush elements to bend when they come into contact with the surface to be cleaned is relatively low. This also means that a friction power which is generated between the brush elements and the surface is low, whereby heating of the surface and associated damage of the surface are prevented.
  • the brush elements When brush elements come into contact with a dirt particle or liquid, or, in case an indentation of the brush with respect to the surface is set, the brush elements are bent. As soon as the brush elements with the dirt particles and liquid adhering thereto loose contact with the surface, the brush elements are straightened out, wherein especially the tip portions of the brush elements are moved with a relatively high acceleration. As a result the centrifugal acceleration at the top portions of the brush elements is increased. Hence, the liquid droplets and dirt particles adhering to the brush elements are launched from the brush elements, as it were, as the acceleration forces are higher than the adhesive forces, as this has been mentioned according to the embodiment above.
  • the values of the acceleration forces are determined by various factors, including the deformation and the linear mass density as mentioned, but also by the speed at which the brush is driven.
  • a factor which may play an additional role in the cleaning function of the rotatable brush is a packing density of the brush elements.
  • the packing density of the brush elements is at least 30 tufts of brush elements per cm 2 , wherein a number of brush elements per tuft is at least 500.
  • Arranging the brush elements in tufts forms additional capillary channels, thereby increasing the capillary forces of the brush for picking-up dirt particles and liquid droplets from the surface to be cleaned.
  • the linear mass density of a majority of a total number of the brush elements is, at least at the tip portions, lower than 20 g per 10 km.
  • the drive means are, according to an embodiment of the present invention, adapted to realize an angular velocity of the brush which is in a range of 3,000 to 15,000 revolutions per minute, more preferably in a range of 5,000 to 8,000 revolutions per minute, during operation of the device.
  • an angular velocity of the brush which is in a range of 3,000 to 15,000 revolutions per minute, more preferably in a range of 5,000 to 8,000 revolutions per minute, during operation of the device.
  • the desired centrifugal accelerations at the tip portions of the brush elements do not only depend on the angular velocity, respectively on the frequency of the brush, but also on the radius, respectively on the diameter of the brush. It is therefore, according to a further embodiment of the invention, preferred that the brush has a diameter which is in a range of 10 to 100 mm, more preferably in a range of 20 to 80 mm, most preferably in range of 35 to 50 mm, when the brush elements are in a fully outstretched condition, and wherein the length of the brush elements is in a range of 1 to 20 mm, preferably in a range of 8 to 12 mm, when the brush elements are in a fully outstretched condition.
  • the presented cleaning device has the ability to realize extremely good cleaning results. These cleaning results can be even improved by actively wetting the surface to be cleaned. This is especially advantageous in case of stain removal.
  • the liquid used in the process of enhancing adherence of dirt particles to the brush elements may be provided in various ways.
  • the rotatable brush and the flexible brush elements may be wetted by a liquid which is present on the surface to be cleaned.
  • a liquid is water, or a mixture of water and soap.
  • a liquid may be provided to the flexible brush elements by actively supplying the cleansing liquid to the brush, for example, by oozing the liquid onto the brush, or by injecting the liquid into a hollow core element of the brush.
  • the cleaning device comprises means for supplying a liquid to the brush at a rate which is lower than 6 ml per minute per cm of a width of the brush in which the brush axis is extending. It appears that it is not necessary for the supply of liquid to take place at a higher rate, and that the above-mentioned rate suffices for the liquid to fulfill a function as a carrying/transporting means for dirt particles. Thus, the ability of removing stains from the surface to be cleaned can be significantly improved.
  • An advantage of only using a little liquid is that it is possible to treat delicate surfaces, even surfaces which are indicated as being sensitive to a liquid such as water.
  • an autonomy time is longer, i.e. it takes more time before the reservoir is empty and needs to be filled again.
  • a spilled liquid i.e. a liquid which is to be removed from the surface to be cleaned.
  • a spilled liquid i.e. a liquid which is to be removed from the surface to be cleaned.
  • Examples are spilled coffee, milk, tea, or the like.
  • the above-mentioned effect of re-spraying the surface in the area between the brush and the squeegee is overcome by the squeegee element which collects this re-sprayed liquid and dirt by acting as kind of wiper, so that remaining liquid and dirt may then be ingested due to the applied under-pressure.
  • the squeegee thus ensures that the remaining liquid and dirt is not leaving the suction area again without being ingested by the vacuum aggregate. It therefore kind of closes the suction area for dirt and liquid on one side of the nozzle housing.
  • the combination of the selected brush with the squeegee thus results in a very good cleaning and drying effect.
  • the cleaning device further comprises means for generating an air-flow on a brush side facing away from the squeegee element, in an area where the brush contacts the surface to be cleaned during operation of the device.
  • Said air flow mainly has the function to counteract the air flow which is produced during the rotation of the brush. Due to the high speeds with which the brush is driven turbulent air streams may be generated outside the nozzle housing which could force dirt particles and liquid droplets present on the surface to blow away from the area where the brush elements, during rotation, first contact the floor.
  • means for generating an air flow in an area where the brush contacts the surface to be cleaned may be applied, such that the air flow caused by the brushes is compensated.
  • the generated counter-air flow is thereto preferably inwardly directed to generate a suction effect which forces the dirt particles and the liquid droplets to either directly enter the nozzle in front of the brush or to be encountered by the brush and then picked-up by the brush as explained above.
  • a possibility to implement such an air flow generation is to arrange a small opening between the nozzle housing and the brush at a front side of the brush, where the brush elements leave the nozzle housing during rotation. In this way a second suction inlet is created at the front of the nozzle.
  • the cleaning device comprises a deflector for contacting the brush at a location, seen in direction of rotation, before the location where the brush contacts the surface to be cleaned during rotation.
  • the brush elements are pressed together by the deflector, whereby air, which is during the operation of the device always present in the space between the brush elements, will be pushed out of said space.
  • the brush elements will be straightened out again and moved apart from each other in order to increase the area between the brush elements. This abrupt increase of the space between the brush elements generates an additional under-pressure in the area where the brush elements first contact the surface to be cleaned.
  • the additional under-pressure generates an additional suction effect with which air and thereby also dirt and liquid particles are sucked into the brush. Since the air is sucked into the brush close to the position where the brush is pressed together by the surface to be cleaned, the above-mentioned, unwanted turbulent air stream, which is caused by the rotation of the brush and its contact with the surface to be cleaned, is efficiently compensated for.
  • the deflector furthermore prevents droplets of water or cleaning liquid from falling back on the already cleaned surface.
  • the deflector is arranged to sufficiently contact the brush in order to being able to guarantee the above-mentioned functions.
  • the deflector can, for example, be a simple part of the nozzle housing that protrudes towards the inside of the housing and thereby contacts the brush elements during the rotation of the brush.
  • the deflector itself may either be realized by a stiff part of the nozzle housing or by a flexible element which is attached to the nozzle housing and is able to at least partly flex when it comes into contact with the brush elements.
  • the brush is a spiraled brush having tufts arranged on the periphery of the brush in a spiral-like pattern.
  • Such a spiraled configuration of the tufts significantly reduces the suction power needed.
  • Figs. 1 and 2 show a schematic cross-section of a first embodiment of a nozzle arrangement 10 of a cleaning device 100 according to the present invention.
  • the nozzle arrangement 10 comprises a brush 12 that is rotatable about a brush axis 14.
  • Said brush 12 is provided with flexible brush elements 16 which are preferably realized by thin microfiber hairs.
  • the flexible brush elements 16 comprise tip portions 18 which are adapted to contact a surface to be cleaned 20 during the rotation of the brush 12 and to pick-up dirt particles 22 and liquid 24 from said surface 20 during a pick-up period when the brush elements 16 contact the surface 20.
  • a linear mass density of a plurality, preferably of a majority of the brush elements 16 is, at least at their tip portions 18, chosen to be lower than 150 g/10 km.
  • the nozzle arrangement 10 comprises a drive means, e.g. a motor (not shown), for driving the brush 12 in a predetermined direction of rotation 26.
  • Said drive means are adapted to realize a centrifugal acceleration at the tip portions 18 of the brush elements 16 which is, in particular during a dirt release period when the brush elements 16 are free from contact to the surface 20 during the rotation of the brush 12, at least 3,000 m/s 2 .
  • the brush 12 is at least partly surrounded by a nozzle housing 28.
  • the arrangement of the brush 12 within the nozzle housing 28 is preferably chosen such that the brush 12 at least partially protrudes from a bottom side 30 of the nozzle housing 28, which, during use of the device 100, faces the surface to be cleaned 20.
  • a squeegee element 32 is attached to said bottom side 30 of the nozzle housing 28.
  • This squeegee element 32 is arranged such that it contacts the surface to be cleaned 20 during the use of the device 100.
  • the squeegee 32 is used as a kind of wiping element for pushing or wiping dirt particles 22 and liquids 24 across or off the surface 20 when the cleaning device 100 is moved.
  • Said squeegee 32 is preferably spaced apart from the brush 12 and extends substantially parallel to the brush axis 14.
  • the nozzle housing 28, the squeegee 32 and the brush 12 together define a suction area 34 which is located within the nozzle housing 28.
  • the suction area 34 in the meaning of the present invention, not only denotes the area between the brush 12, the squeegee 32 and the nozzle housing 28, but also denotes the space between the brush elements 16 for the time during the rotation of the brush 12 in which the brush elements 16 are inside the nozzle housing, as well as it denotes an area that is defined between the squeegee 32 and the brush 12.
  • the latter area will be in the following also denoted as suction inlet 36 which opens into the suction area 34.
  • an under-pressure is generated in the suction area for ingesting dirt particles 22 and liquid 24 that have been encountered and collected by the brush 12 and the squeegee 32.
  • said under-pressure preferably ranges between 3 and 70 mbar, more preferably between 4 and 50 mbar, most preferably between 5 and 30 mbar.
  • This under-pressure is, compared to regular vacuum cleaners which apply an under-pressure of around 70 mbar, quite low.
  • very good cleaning results may already be realized in the above-mentioned pressure ranges.
  • smaller vacuum aggregates 38 may be used. This increases the freedom in the selection of the vacuum pump.
  • the main gist of the present invention is that by applying the above-mentioned parameters concerning the linear mass density of the brush elements 16 and by realizing a centrifugal acceleration at the tip portions 18 of the brush elements 16 in the above-mentioned range, very good cleaning results and stain removal properties can be achieved by equipping the nozzle 10 with only a single brush 12 and a single squeegee element 32.
  • the presented solution results in a very space-saving nozzle size.
  • the very good cleaning properties that can be achieved with the presented solution mainly rely on the brush 12, which is due to the above-mentioned operating parameters, in contrast to hard brushes used in prior art solutions, not only able to pick-up dirt particles 22 from the surface to be cleaned 20, but also to pick-up liquid 24 from the surface to be cleaned 20.
  • a backward stroke in this meaning denotes a movement of the nozzle arrangement 10 in an intended movement direction 40, in which the squeegee element 32 encounters dirt and liquid particles 22, 24 present on the surface 20 before they are encountered by the brush 12. This situation is exemplarily shown in Fig. 1 .
  • the squeegee element 32 preferably comprises switching means 42 for switching squeegee 32 from an open to a closed position and vice versa, depending on the direction of movement 40 of the nozzle 10 with respect to the surface 20. If the nozzle is moved in a forward stroke (shown in Fig. 2 ) where the squeegee element 32 is, seen in the direction of movement 40 of the cleaning device 100, located behind the brush, the squeegee is arranged in a closed position.
  • the squeegee 32 In this closed position the squeegee 32 is adapted to push or wipe dirt particles 22 and liquid 24 across or off the surface 20 by more or less gliding over the surface 20. In such a forward stroke the squeegee 32 then acts as a kind of wiper that collects the remaining water from the surface 20, which has not been lifted or has been sprayed back from the brush 12 to the surface 20. The remaining water which is collected by the squeegee 32 can then be ingested by means of the applied under-pressure within the suction area 34.
  • the squeegee 32 is arranged in its open position when the nozzle 10 is moved in a backward stroke (shown in Fig. 1 ), in which the squeegee 32 is, seen in the direction of movement 40, located in front of the brush 12, so that it would encounter the dirt particles 22 and the liquid 24 on the surface 20 before they would be encountered by the brush 12.
  • the switching elements 42 switch the squeegee 32 to its open position, wherein dirt particles and liquid from the surface 20 can enter the suction area 34 through an opening in between the squeegee 32 and the surface to be cleaned 20.
  • dirt particles 22 and liquid 24 are also able to enter the suction area 34 at the position of the suction inlet 36 and encounter the brush 12 with which they are picked-up from the surface 20.
  • the squeegee 32 preferably comprises a flexible rubber lip 46 that, depending on the movement direction 40 of the cleaning device 100, is adapted to flex about a longitudinal direction of said rubber lip 46.
  • An enlarged schematic view of the squeegee 32 is shown in Figs. 5 and 6.
  • Fig. 5 shows the squeegee 32 in its closed position
  • Fig. 6 shows a situation of the squeegee 32 in its open position.
  • Studs 50 that are arranged near the lower end of the rubber lip 46 where the squeegee 32 is intended to touch the surface 20, are adapted to at least partly lift the rubber lip 46 from the surface 20, when the cleaning device is moved on the surface 20 in a backward direction 40 (as shown in Fig. 1 ), in which the rubber lip is, seen in the direction of movement 40 located in front of the brush 12.
  • the rubber lip 46 is lifted, which is mainly due to the natural friction which occurs between the surface 20 and the studs 50, which act as a kind of stopper that decelerates the rubber lip 46 and forces it to flip over the studs 50.
  • the squeegee 32 is thereby forced to glide on the studs 50, wherein the rubber lip is lifted by the studs and openings 44 occur in the space between the rubber lip 46 and the surface 20 (see Figs. 6a and b ).
  • Fig. 3 and 4 which show a second embodiment of the nozzle arrangement 10, illustrate that the positions of the squeegee 32 and the brush 12 can be, compared to the first embodiment (shown in Figs. 1 and 2 ), interchanged without leaving the scope of the present invention.
  • the squeegee 32 is in this case, with respect to the brush axis 14, arranged at the other side of the nozzle housing 28.
  • the squeegee element 32 of course has to be in an open position when the nozzle 10 is moved in a forward stroke as shown in Fig. 3 , where the nozzle is moved in a direction 40 in which the squeegee 32 is, seen in the direction of movement 40, located in front of the brush 12. Otherwise, the liquid 24 and dirt particles 22 would again not be able to enter the suction area 34, respectively the suction inlet 36.
  • the squeegee 32 needs to be in its closed position when the nozzle is according to this embodiment moved in a backward stroke as shown in Fig. 4 , where the brush 12 is, seen in movement direction 40, located in front of the squeegee 32 and encounters the dirt and liquid particles 22, 24 first.
  • the squeegee 32 in this case again acts as a wiper that glides over the surface 20 and collects the remaining dirt and liquid particles 22, 24 on the surface 20.
  • the brush 12 preferably has a diameter which is in a range of 20 to 80 mm, and the driving means may be capable of rotating the brush 12 at an angular velocity which is at least 6,000 revolutions per minute.
  • a width of the brush 12, i.e. a dimension of the brush 12 in a direction in which the rotation axis 14 of the brush 12 is extending, may be in an order of 25 cm, for example.
  • tufts 54 are provided on an exterior surface of a core element 52 of the brush 12.
  • Each tuft 54 comprises hundreds of fiber elements, which are referred to as brush elements 16.
  • the brush elements 16 are made of polyester with a diameter in an order of about 10 micrometers, and with a Dtex value which is lower than 150 g per 10 km.
  • a packing density of the brush elements 16 may be at least 30 tufts 54 per cm 2 on the exterior surface of the core element 52 of the brush 12.
  • the brush elements 16 may be rather chaotically arranged, i.e. not at fixed mutual distances. Furthermore, it is mentioned that an exterior surface 56 of the brush elements 16 may be uneven, which enhances the capability of the brush elements 16 to catch liquid droplets 24 and dirt particles 22.
  • the brush elements 16 may be so-called microfibers, which do not have a smooth and more or less circular circumference, but which have a rugged and more or less star-shaped circumference with notches and grooves instead.
  • the brush elements 16 do not need to be identical, as long as it is true that the linear mass density of a majority of a total number of the brush elements 16 of the brush 12 meets the requirement of being lower than 150 g per 10 km, at least at tip portions 18.
  • the brush elements 16 may act more or less like a whip for catching and dragging particles 22, 24, which is force-closed and capable of holding on to a particle 22, 24 on the basis of a functioning which is comparable to the functioning of a band brake. Furthermore, the liquid 24 which is picked up may pull a bit of liquid with it, wherein a line of liquid is left in the air, which is moving away from the surface 20. The occurring accelerations at the tip portions 18 of the brush elements 16 cause the dirt particles 22 and liquid droplets 24 to be automatically released from the brush 12, when the brush elements loose contact from the floor 20 during their rotation.
  • the brush elements 16 Due to the chosen technical parameters the brush elements 16 have a gentle scrubbing effect on the surface 20, which contributes to counteracting adhesion of liquid 24 and dirt particles 22 to the surface 20.
  • the liquid 24 may be expelled in small droplets.
  • This is advantageous for further separation processes such as performed by the vacuum fan aggregate 38, in particular the centrifugal fan of the vacuum aggregate 38, which serves as a rotatable air-dirt separator.
  • suction forces such as the forces exerted by the centrifugal fan do not play a role in the above-described process of picking up liquid and dirt by means of brush elements 16. However, these suction forces are necessary for picking up the dirt and liquid that has been collected by the squeegee.
  • the brush 12 with the brush elements 16 is comparable to a brush 12 which is dipped in a quantity of paint, wherein paint is absorbed by the brush 12 on the basis of capillary forces.
  • the brush 12 according to the present invention has the following properties:
  • the brush elements 16 On the basis of the relatively low value of the linear mass density, it may be so that the brush elements 16 have very low bending stiffness, and, when packed in tufts 54, are not capable of remaining in their original shape. In conventional brushes, the brush elements spring back once released. However, the brush elements 16 having the very low bending stiffness as mentioned will not do that, since the elastic forces are so small that they cannot exceed internal friction forces which are present between the individual brush elements 16. Hence, the tufts 54 will remain crushed after deformation, and will only stretch out when the brush 12 is rotating.
  • the brush 12 which is used according to the present invention is capable of realizing cleaning results which are significantly better, due to the working principle according to which brush elements 16 are used for picking up liquid 24 and dirt 22 and taking the liquid 24 and the dirt 22 away from the surface 20 to be cleaned, wherein the liquid 24 and the dirt 22 are flung away by the brush elements 16 before they contact the surface 20 again in a next round.
  • the brush 12 acts as a kind of gear pump which pumps air from the inside of the nozzle housing 28 to the outside. This is an effect which is disadvantageous, as dirt particles 22 are blown away and droplets of liquid 24 are formed at positions where they are out of reach from the brush 12 and can fall down at unexpected moments during a cleaning process.
  • a first implementation possibility is shown in the first embodiment which is shown in figures 1 and 2 , where a small opening 58 is arranged between nozzle housing 28 and the brush 12 at a position where the brush elements 16 leave the nozzle housing 28 during the rotation of the brush 12.
  • This opening 58 realizes a further suction inlet 60 to the suction area 34 which applies an under-pressure (due to the described under-pressure in the suction area 34) in the area where the brush elements 16 first contact the surface 20.
  • This under-pressure generates an airflow that counteracts the unwanted turbulent airstream that is generated in front of the brush 12 due to its rotation during use.
  • a second possibility to counteract the unwanted turbulent airstream in front of the brush 12 is to equip the brush 12 with tufts 54 of brush elements 16 which are arranged in rows on the brush 12, so that the necessary suction power will be significantly reduced.
  • a deflector 62 for indenting the brush 12 at a position, seen in rotation direction 26, before the brush 12 contacts the surface 20, as this is exemplary shown in second embodiment which is shown in figures 3 and 4 .
  • the deflector 62 has the function to press the brush elements 16 together by deflecting them. In this way air, which is present in the space between the brush elements 16, is pushed out of said space.
  • the brush elements 16 are, after leaving the deflector 62, moved apart from each other again, the space in between the brush elements 16 increases so that air will be sucked into the brush 12, wherein an under-pressure is created that sucks in dirt 22 and liquid particles 24. This again compensates for the air blow that is generated by the rotating brush 12.
  • Examples of deflectors as mentioned are found in PCT/IB2009/054333 and PCT/IB2009/054334, both in the name of Applicant.
  • f 133 Hz
  • W 0.25 m
  • D 0.044 m
  • I 0.003 m.
  • Figure 7 provides a view of the cleaning device 100 according to the present invention in its entirety.
  • the cleaning device 100 comprises a nozzle housing 28 in which the brush 12 is rotatably mounted on the brush axis 14.
  • a drive means which can be realized be a regular motor, such as e.g. an electro motor (not shown), is preferably connected to or even located on the brush axis 14 for the purpose of driving the brush 12 in rotation. It is noted that the motor may also be located at any other suitable position within the cleaning device 100.
  • the nozzle housing 28 means such as wheels (not shown) are arranged for keeping the rotation axis 14 of the brush 12 at a predetermined distance from the surface 20 to be cleaned, wherein the distance is chosen such that the brush 12 is indented.
  • the range of the indentation is from 2% to 12% of a diameter of the brush 12 relating to a fully outstretched condition of the brush elements 16.
  • the range of the indentation can be from 1 to 6 mm.
  • the squeegee element 32 is spaced apart from the brush 12 and attached to the bottom side 30 of the nozzle housing 28. It extends substantially parallel to the brush axis 14, thereby defining a suction area 34 within the nozzle housing 28 in between the squeegee element 32 and the brush 12, which suction area 34 has a suction inlet 36 which is located at the bottom side 30 of the nozzle housing 28 facing the surface 20 to be cleaned.
  • the cleaning device 100 is preferably provided with the following components:
  • an element may be provided for deflecting the debris 22, 24 that is flung upwards, so that the debris 22, 24 first undergoes a deflection before it eventually reaches the debris collecting chamber 70.
  • the vacuum fan aggregate 38 may be arranged at another side of the debris collecting chamber 70 than the side which is opposite to the side where the tube 72 is arranged.
  • the brush 12 comprises a core element 52.
  • This core element 52 is in the form of a hollow tube provided with a number of channels 74 extending through a wall 76 of the core element 52.
  • a flexible tube 78 may be provided that leads into the inside of the core element 52.
  • cleansing fluid 68 may be supplied to the hollow core element 52, wherein, during the rotation of the brush 12, the liquid 68 leaves the hollow core element 52 via the channels 74, and wets the brush elements 16. In this way the liquid 68 also drizzles or falls on the surface 20 to be cleaned. Thus, the surface 20 to be cleaned becomes wet with the cleansing liquid 68. This especially enhances the adherence of the dirt particles 22 to the brush elements 16 and, therefore improves the ability to remove stains from the surface 20 to be cleaned.
  • the rate at which the liquid 68 is supplied to the hollow core element 52 can be quite low, wherein a maximum rate can be 6 ml per minute per cm of the width of the brush 12, for example.
  • a cleansing liquid could be supplied by spraying the brush 12 from outside or by simply immersing the brush 12 in cleansing water before the use.
  • a liquid that has been already spilled i.e. a liquid that needs to be removed from the surface 20 to be cleaned.
  • the pick-up of the cleansing water 68 from the floor is, as already mentioned above, either done by the squeegee element 32 which collects the water by acting as a kind of wiper transporting liquid to the suction area 34 where it is ingested due to the under-pressure generated by the vacuum aggregate 38, or the water is directly picked-up from the floor by the brush 12.
  • the brush 12 used according to the present invention is capable of picking-up water. The realized cleaning results are thus significantly better.
  • the experiment includes rotating the brush under similar conditions and assessing cleaning results, wear, and power to the surface 20 subjected to treatment with the brush 12. This provides an indication of heat generation on the surface 20.
  • the outcome of the experiment is reflected in the following table, wherein a mark 5 is used for indicating the best results, and lower marks are used for indicating poorer results. stain removal water pick-up wear power to the surface Brush 1 5 3 3 3 Brush 2 5 3 1 4 Brush 3 5 4 4 5 Brush 4 5 5 5 5 5
  • the experiment proves that it is possible to have brush elements 16 with a linear mass density in a range of 100 to 150 g per 10 km, and to obtain useful cleaning results, although it appears that the water pick-up, the wear behavior and the power consumption are not so good. It is concluded that an appropriate limit value for the linear mass density is 150 g per 10 km. However, it is clear that with a much lower linear mass density, the cleaning results and all other results are very good. Therefore, it is preferred to apply lower limit values, such as 125 g per 10 km, 50 g per 10 km, 20 g per 10 km, or even 5 g per 10 km. With values in the latter order, it is ensured that cleaning results are excellent, water pick-up is optimal, wear is minimal, and power consumption and heat generation on the surface 20 are sufficiently low.
  • the brush 12 which is used appears to be capable of absorbing a total weight of water of approximately 70 g. 5)
  • the brush 12 is rotated at an angular velocity of 1,950 revolutions per minute, and is stopped after 1 second or 4 seconds. 6)
  • the weight of the assembly of the brush 12 and the motor is determined, and the difference with respect to the dry weight, which is determined under step 2), is calculated.
  • a transition in the release of water by the brush 12 can be found at an angular velocity of 3,500 rpm, which corresponds to a centrifugal acceleration of 3,090 m/s 2 .
  • the graphs of figures 9 and 10 contain a vertical line indicating the values of 3,500 rpm and 3,090 m/s 2 , respectively.
  • the centrifugal acceleration may be lower than 3,000 m/s 2 .
  • the reason is that the acceleration which occurs at tips 18 of the brush elements 16 when the brush elements 16 are straightened out can be expected to be higher than the normal centrifugal acceleration.
  • the experiment shows that a minimum value of 3,000 m/s 2 is valid in respect of an acceleration, which is the normal, centrifugal acceleration in the case of the experiment, and which can be the higher acceleration which is caused by the specific behavior of the brush elements 16 when the dirt pick-up period has passed and there is room for straightening out in an actual cleaning device 100 according to the present invention, which leaves a possibility for the normal, centrifugal acceleration during the other periods of the rotation (e.g. the dirt pick-up period) to be lower.
  • an acceleration which is the normal, centrifugal acceleration in the case of the experiment, and which can be the higher acceleration which is caused by the specific behavior of the brush elements 16 when the dirt pick-up period has passed and there is room for straightening out in an actual cleaning device 100 according to the present invention, which leaves a possibility for the normal, centrifugal acceleration during the other periods of the rotation (e.g. the dirt pick-up period) to be lower.
  • a fully outstretched condition of the brush elements 16 is a condition in which the brush elements 16 are fully extending in a radial direction with respect to a rotation axis 14 of the brush 12, wherein there is no bent tip portion in the brush elements 16.
  • This condition can be realized when the brush 12 is rotating at a normal operative speed, which is a speed at which the acceleration of 3,000 m/sec 2 at the tips 18 of the brush elements 16 can be realized. It is possible for only a portion of the brush elements 16 of a brush 12 to be in the fully outstretched condition, while another portion is not, due to obstructions which are encountered by the brush elements 16. Normally, the diameter D of the brush 12 is determined with all of the brush elements 16 in the fully outstretched condition.
  • the tip portions 18 of the brush elements 16 are outer portions of the brush elements 16 as seen in the radial direction, i.e. portions which are the most remote from the rotation axis 14.
  • the tip portions 18 are the portions which are used for picking up dirt particles 22 and liquid, and which are made to slide along the surface 20 to be cleaned.
  • a length of the tip portion is approximately the same as the indentation.
  • the present invention can be summarized as follows.
  • the presented solution results in a very space-saving nozzle size.
  • the very good cleaning properties that can be achieved with the presented solution mainly rely on the brush, which is due to the above-mentioned operating parameters, in contrast to hard brushes used in prior art solutions, not only able to pick-up dirt particles from the surface, but also to pick-up liquid from the surface to be cleaned.
  • a double squeegee solution is no longer necessary. Because of having only a single squeegee element and only one brush, the nozzle becomes less bulky. Due to the reduced number of squeegees (only one) scratching is significantly reduced.
  • the proposed nozzle arrangement is, at least at the brush side, open for coarse dirt. The brush and the squeegee together form a channel. Due to the spraying of the brush, the suction area, and therefore also the squeegee, are constantly cleaned. All over all, very good cleaning results can be achieved with a very small, but highly effective nozzle having only one squeegee and only one brush.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles For Electric Vacuum Cleaners (AREA)
  • Cleaning In General (AREA)
  • Electric Vacuum Cleaner (AREA)

Claims (15)

  1. Düsenanordnung für eine Hartbodenreinigungsvorrichtung (100), Folgendes umfassend:
    - eine einzige um eine Bürstenachse (14) drehbare Bürste (12), wobei die besagte Bürste (12) mit flexiblen Bürstenelementen (16) versehen ist, die Spitzenabschnitte (18) zum Berühren der zu reinigenden Fläche (20) aufweisen und die während einer Aufnahmezeit, wenn die Bürstenelemente (16) die Fläche (20) während der Drehung der Bürste (12) berühren, Schmutzpartikel (22) und Flüssigkeit (24) von der Fläche (20) aufnehmen, wobei eine lineare Massendichte einer Vielzahl von Bürstenelementen (16) zumindest an den Spitzenabschnitten (18) kleiner ist, als 150 g pro 10 km, und
    - ein einziges Rakelelement (32) zum Schieben und Wischen von Schmutzpartikeln (22) und Flüssigkeit (24) über die oder von der zu reinigenden Fläche (20) während der Bewegung der Reinigungsvorrichtung (100), wobei das besagte Rakelelement (32) im Abstand zur Bürste (12) angebracht ist, und sich im Wesentlichen entlang einer Längsrichtung (48) erstreckt, die im Wesentlichen parallel zur Bürstenachse (14) verläuft, wobei ein Saugbereich (34) innerhalb der Düsenanordnung (10) zwischen dem Rakelelement (32) und der Bürste (12) definiert wird, und
    - Antriebsmittel, um die Bürste (12) in Drehung zu versetzen, wobei die Antriebsmittel ausgeführt sind, um eine Zentrifugalbeschleunigung an den Spitzenabschnitten (18) zu erzeugen, die im Speziellen während einer Schmutzfreisetzungszeit, wenn die Bürstenelemente (16) die Fläche (20) während der Drehung der Bürste (12) nicht berühren, zumindest 3.000 m/s2 beträgt.
  2. Düsenanordnung nach Anspruch 1, wobei die Bürstenachse (14) und/ oder die Längsrichtung (48) des Rakelelements (32) querlaufend angeordnet ist, vorzugsweise querlaufend zur beabsichtigten Bewegungsrichtung (40) der Reinigungsvorrichtung (100).
  3. Düsenanordnung nach Anspruch 1, wobei das Rakelelement (32) Schaltmittel (42) zum Umschalten des Rakelelements (32) in eine geschlossene Position umfasst, in der das Rakelelement (32) ausgeführt ist, um Schmutzpartikel (22) und Flüssigkeit (24) über die oder von der zu reinigenden Fläche (20) zu schieben oder zu wischen, wenn die Reinigungsvorrichtung (100) auf der Fläche (20) in eine Vorwärtsrichtung bewegt wird, in der sich das Rakelelement (32) in Bewegungsrichtung (40) der Reinigungsvorrichtung (100) gesehen hinter der Bürste (12) befindet, und zum Umschalten des Rakelelements (32) in eine offene Position, in der Schmutzpartikel (22) und Flüssigkeit (24) von der zu reinigenden Fläche (20) durch eine Öffnung (44) zwischen dem Rakelelement (32) und der besagten Fläche (20) in den Saugbereich (34) eintreten können, wenn die Reinigungsvorrichtung (100) auf der Fläche (20) in Rückwärtsrichtung bewegt wird, in der sich das Rakelelement (32) in Bewegungsrichtung (40) der Reinigungsvorrichtung (100) gesehen vor der Bürste (12) befindet.
  4. Düsenanordnung nach Anspruch 1, wobei die Düsenanordnung (10) ein Düsengehäuse (28) umfasst, das die Bürste (12) zumindest teilweise umgibt, und wobei das Rakelelement (32) im besagten Gehäuse (28) befestigt ist.
  5. Düsenanordnung nach Anspruch 1, darüber hinaus Positioniermittel zum Positionieren der Bürstenachse (14) in einem Abstand zur zu reinigen Fläche (20) umfassend, der kleiner ist, als der Radius der Bürste (12) mit voll ausgestreckten Bürstenelementen (16), um eine Einrückung des Bürstenteils zu realisieren, der während des Betriebs die Fläche (20) berührt wobei die Einrückung in einem Bereich von 2 % bis 12 % des Bürstendurchmessers liegt.
  6. Düsenanordnung nach Anspruch 1, wobei die Packungsdichte der Bürstenelemente (16) zumindest bei 30 Büschel (54) an Bürstenelementen (16) pro cm2 liegt und wobei eine Anzahl von Bürstenelementen (16) je Büschel (54) zumindest 500 beträgt.
  7. Düsenanordnung nach Anspruch 1, wobei die lineare Massendichte einer Mehrheit einer Gesamtanzahl von Bürstenelementen (16) zumindest an den Spitzenabschnitten (18) geringer ist, als 20 g pro 10 km.
  8. Düsenanordnung nach Anspruch 1, wobei die Antriebsmittel ausgeführt sind, um eine Winkelgeschwindigkeit der Bürste (12) zu erzeugen, die beim Betrieb der Vorrichtung (100) in einem Bereich von 3.000 bis 15.000 Umdrehungen pro Minute, vorzugsweise in einem Bereich von 5.000 bis 8.000 Umdrehungen pro Minute liegt.
  9. Düsenanordnung nach Anspruch 1, wobei die Bürste (12) einen Durchmesser aufweist, der in einem Bereich von 10 bis 100 mm, vorzugsweise in einem Bereich von 20 bis 80 mm, und am besten in einem Bereich von 35 bis 50 mm liegt, wenn die Bürstenelemente (16) in einem voll ausgestreckten Zustand sind, und wobei die Länge der Bürstenelemente (16) in einem Bereich von 1 bis 20 mm, vorzugsweise in einem Bereich von 8 bis 12 mm liegt, wenn die Bürstenelemente (16) in einem voll ausgestreckten Zustand sind.
  10. Düsenanordnung nach Anspruch 1, Mittel zum Zuführen einer Flüssigkeit (68) zur Bürste (12) mit einer Rate umfassend, die geringer ist, als 6 ml pro Minute pro cm einer Breite der Bürste (12), in die sich die Bürstenachse (14) erstreckt.
  11. Düsenanordnung nach Anspruch 1, Mittel (58, 62) zum Erzeugen eines Luftstroms an einer Seite der Bürste umfassend, die vom Rakelelement (32) abgewandt ist, in einem Bereich, in dem die Bürste (12) während des Betriebs der Vorrichtung (100) die zu reinigende Fläche (20) berührt.
  12. Düsenanordnung nach Anspruch 1, einen Abweiser (62) zum Berühren der Bürste (12) an einer Stelle umfassend, die sich in die Drehrichtung (26) gesehen vor der Stelle befindet, an der die Bürste (12) während der Drehung die zu reinigende Fläche (20) berührt.
  13. Düsenanordnung nach Anspruch 1, wobei die Bürste (12) eine spiralförmige Bürste ist, die Büschel (54) aufweist, die an der Peripherie der Bürste (12) in einem spiralförmigen Muster angeordnet sind.
  14. Hartbodenreinigungsvorrichtung zum Reinigen einer Fläche (20), Folgendes umfassend:
    - die Düsenanordnung (10) nach Anspruch 1, und
    - ein Vakuumaggregat (38) zum Erzeugen eines Unterdrucks im Saugbereich (34) zum Aufsammeln von Schmutzpartikeln (22) und Flüssigkeit (24).
  15. Hartbodenreinigungsvorrichtung nach Anspruch 14, wobei der besagte Unterdruck, der vom Vakuumaggregat (38) erzeugt wird, in einem Bereich von 3 bis 70 mbar, vorzugsweise in einem Bereich von 4 bis 50 mbar und am besten in einem Bereich von 5 bis 30 mbar liegt.
EP12778420.5A 2011-08-23 2012-08-17 Reinigungsvorrichtung zur reinigung einer oberfläche mit einer bürste und rakelelement Active EP2747626B1 (de)

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US201161526316P 2011-08-23 2011-08-23
PCT/IB2012/054200 WO2013027164A1 (en) 2011-08-23 2012-08-17 Cleaning device for cleaning a surface comprising a brush and a squeegee element

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EP2747626B1 true EP2747626B1 (de) 2017-05-03

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IN2015DN02486A (de) * 2012-12-25 2015-09-11 Miraikikai Inc
WO2014122114A1 (en) 2013-02-05 2014-08-14 Koninklijke Philips N.V. Nozzle arrangement with brush and squeegee
ITMI20130970A1 (it) * 2013-06-13 2014-12-14 Ghibli S P A Testata a doppio tergitore per macchina per la pulitura di superfici
CN103505152B (zh) * 2013-10-15 2016-02-17 苏州诚河清洁设备有限公司 用于表面清洁装置的清洁头
EP4190219B1 (de) 2013-12-12 2024-09-25 Alfred Kärcher SE & Co. KG Bodenreinigungsmaschine
GB2522434B (en) * 2014-01-23 2017-08-23 Techtronic Floor Care Tech Ltd A head for a surface cleaning device
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EP2747626A1 (de) 2014-07-02
JP2014526934A (ja) 2014-10-09
CN203016862U (zh) 2013-06-26
JP5960823B2 (ja) 2016-08-02
RU2014111047A (ru) 2015-09-27
CN103764004A (zh) 2014-04-30
CN102949151A (zh) 2013-03-06
CN102949151B (zh) 2017-09-08
US20140182079A1 (en) 2014-07-03
WO2013027164A1 (en) 2013-02-28

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