EP3277887B1 - Reinigungsvorrichtung mit verwendung von ansaugung mit einem wirbelwindeffekt - Google Patents

Reinigungsvorrichtung mit verwendung von ansaugung mit einem wirbelwindeffekt Download PDF

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Publication number
EP3277887B1
EP3277887B1 EP16706305.6A EP16706305A EP3277887B1 EP 3277887 B1 EP3277887 B1 EP 3277887B1 EP 16706305 A EP16706305 A EP 16706305A EP 3277887 B1 EP3277887 B1 EP 3277887B1
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EP
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Prior art keywords
suction nozzle
suction
nozzle
dirt container
vacuum
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EP16706305.6A
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English (en)
French (fr)
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EP3277887A1 (de
Inventor
Henning Emil PEDERSEN
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Timan AS
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Timan AS
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
    • E01H1/08—Pneumatically dislodging or taking-up undesirable matter or small objects; Drying by heat only or by streams of gas; Cleaning by projecting abrasive particles
    • E01H1/0827—Dislodging by suction; Mechanical dislodging-cleaning apparatus with independent or dependent exhaust, e.g. dislodging-sweeping machines with independent suction nozzles ; Mechanical loosening devices working under vacuum
    • E01H1/0836—Apparatus dislodging all of the dirt by suction ; Suction nozzles
    • E01H1/0845—Apparatus dislodging all of the dirt by suction ; Suction nozzles with mechanical loosening or feeding instruments for the dirt to be sucked- up, e.g. brushes, scrapers

Definitions

  • the present invention relates to a cleaning device using suction for collecting dirt in a dirt container, to a suction nozzle for such a device and to a method carried out by such a device.
  • the first method consists in sweeping the dirt directly into a dirt container, the bottom part of which forms a dustpan.
  • the use of this method puts a limit to the size of the dirt container because all the dirt must be swept into the container and therefore the dirt layer within the container can only be as high as the sweeping brush(es) is/are able to lift up the dirt.
  • This method is not used very often in machines for outdoor cleaning where, typically, there is a large volume of dirt, because this means that the dirt container must be emptied very often which, in turn, results in a low efficiency of the sweeping procedure.
  • the dirt is sucked into the dirt container, often by means of a rotating suction wheel creating a vacuum within the dirt container, which is connected to a suction nozzle through a suction hose.
  • the orifice of the suction nozzle is moved across the surface to be cleaned.
  • the larger the vacuum formed within the dirt container and/or within the suction hose the larger the airflow and vacuum are created within the suction nozzle and the larger items can be lifted up from the surface by the suction nozzle and sucked into the dirt container.
  • the generation of a larger vacuum also results in a larger noise level created by the vacuum-generating means.
  • more energy may be used to generate a larger vacuum and airflow within the suction nozzle for better lifting up the items from the surface and sucking them through the suction hose into the dirt container.
  • the design of the suction nozzle is very important. For instance, the airflow inside the suction nozzle gets longer time to lift up the items into the airflow if the distance between the front edge of the suction nozzle and the connection of the suction hose to the suction nozzle is increased.
  • the efficiency of the suction nozzle can be improved by creating an opening along the rear edge of the suction nozzle, so that two airflows - one oncoming (from the front) and one from behind - are created within the suction nozzle, which, so to speak, gives the items two chances for being lifted up into the suction hose.
  • high airflow velocities through the openings in the front and rear edges of the suction nozzle are needed, if items such as round stones and shifting sand are to be lifted up. Such high velocities are typically obtained by reducing the height of these openings.
  • the use of low openings along the front and rear edges of the suction nozzle causes the vacuum within the suction nozzle and/or the dirt container to increase.
  • the suction nozzle is moved across the surface to be cleaned too fast and therefore too many items are not lifted by the oncoming airflow, it may have at least two consequences. Firstly, the airflow from behind has less time to lift up the items. Secondly, the items which are not lifted up and which are too large to leave the suction nozzle through the opening along the rear edge of the suction nozzle will aggregate and eventually block the airflow, resulting in a reduction or complete elimination of the suction efficiency of the machine. Thus, the relation between the air velocity within the suction nozzle and the ground speed of the machine is important for ensuring that all items are lifted up by the suction nozzle.
  • US 2 027 543 A discloses a suction nozzle for being connected to a dirt container of a cleaning device through a suction hose, said suction nozzle having one or more air inlet channels causing airflows entering the suction nozzle through those air inlet channels to have directions, which are substantially tangential to the opening of the suction hose into the suction nozzle.
  • the present invention relates to a cleaning device for cleaning indoor and/or outdoor areas, said cleaning device comprising a suction nozzle being connected to a dirt container through a suction hose and a vacuum-generating means, such as for instance a suction wheel, for generating a vacuum within the dirt container and/or within the suction hose, wherein, when a vacuum is generated within the dirt container and/or within the suction hose and the nozzle orifice is placed against a surface to be cleaned, dirt in the form of particles and smaller items can be lifted up from the surface by the suction nozzle and sucked into the dirt container through the suction hose, and wherein at least one air inlet channel is arranged within the periphery of the nozzle orifice in such a way that, when a vacuum is generated within the dirt container and/or within the suction hose and the nozzle orifice is placed against the surface to be cleaned, an airflow is caused to enter the suction nozzle through the air inlet channel in a direction, which is substantially parallel to
  • the cleaning device further comprises a plurality of air inlet channels arranged to create airflows into the suction nozzle in directions, which are substantially parallel to the surface to be cleaned and substantially tangential to the opening of the suction hose into the suction nozzle, which air inlet channels are preferably distributed along the all other sides of the suction nozzle than the front side.
  • the cleaning device further comprises one or more air inlet channels arranged in a sidewall and/or a top of the suction nozzle in such a way that, when a vacuum is generated within the dirt container and/or within the suction hose and the nozzle orifice is placed against a surface to be cleaned, an airflow is caused to enter the suction nozzle through the air inlet channel in a direction, which is inclined against the nozzle orifice and substantially tangential to the opening of the suction hose into the suction nozzle.
  • the strength of the whirlwind effect can be improved even more by adding more air inlet channels than there is room for along the periphery of the nozzle orifice.
  • the air inlet channels When placed in a sidewall or the top of the suction nozzle, the air inlet channels should be inclined against the orifice since, as mentioned above, all of the air is sucked into the suction hose from the bottom of the whirlwind.
  • these air inlet channels may furthermore be directed towards points slightly within the periphery thereof.
  • the cleaning device further comprises one or more movable, preferably rotatable, brushes placed at least partly in front of the suction nozzle, which brushes are arranged to sweep dirt towards the front side of the suction nozzle, i.e. into the one or more airflows entering the suction nozzle through and/or under the front side.
  • the efficiency of the cleaning device may be further improved by combining the whirlwind effect with the use of brushes similar to what is the case for other cleaning systems known in the art.
  • the cleaning device is a self-propelled road sweeper.
  • a road sweeper constitutes a preferred embodiment of the cleaning system according to the invention primarily for outdoor use.
  • the cleaning device is a vacuum cleaner.
  • a vacuum cleaner constitutes a preferred embodiment of the cleaning system according to the invention primarily for indoor use.
  • a suction nozzle for being connected to a dirt container of a cleaning device through a suction hose, said suction nozzle having one or more air inlet channels causing airflows entering the suction nozzle through those air inlet channels, when a vacuum is generated within the dirt container and/or within the suction hose and the nozzle orifice is placed against a surface to be cleaned, to have directions, which are substantially tangential to the opening of the suction hose into the suction nozzle, whereby a whirlwind is formed within the suction nozzle, which whirlwind continues at least partly through the suction hose to the dirt container, and wherein the suction nozzle is designed to have a front side being designed so that one or more substantially parallel oncoming airflows enter the suction nozzle through and/or under the front side when a vacuum is generated within the dirt container and/or within the suction hose and the suction nozzle is moved with the front side first across a surface to be cleaned.
  • a suction nozzle being connected to a dirt container through a suction hose and a vacuum-generating means, such as for instance a suction wheel, for generating a vacuum within the dirt container and/or within the suction hose, said method comprising the steps of
  • the invention not only relates to a complete cleaning device as described above but also to a suction nozzle for such a cleaning device, for instance for replacement of an existing suction nozzle not falling within the scope of the present invention, and to the method carried out by such a cleaning device.
  • Fig. 1 is a perspective view of a road sweeper 1 according to an embodiment of the invention, primarily designed for removing leaves, stones, paper, branches, plastics, grass, sand, dirt and other particles and small items, i.e. for outdoor use.
  • the illustrated road sweeper comprises a dirt container 2 placed at its rear end and a sweeping and suction unit 3 arranged at its front end.
  • the illustrated sweeping and suction unit 3 comprises two rotating brushes 6 and a suction nozzle 4, the latter being connected to the dirt container 2 through a suction hose 5.
  • the suction nozzle 4 is provided with a number of wheels 13.
  • the suction nozzle 4 can be designed to slide against the surface to be cleaned, i.e. without wheels 13.
  • the sweeping and suction unit 3 can be replaced with a suction unit, i.e. with a suction nozzle 4, suction hose 5 and dirt container 2 but without any brushes 6.
  • Fig. 2 is a partly cross-sectional view of the road sweeper 1 showed in Fig. 1 .
  • This illustration further shows a suction wheel 7 arranged within the dirt container 2 for generating a vacuum therein. It is also shown, how the suction hose 5 passes through the road sweeper for connecting the dirt container 2 and the suction nozzle 4 to each other.
  • the suction nozzle 4 is provided with a bottle flap 9 for letting items into the suction nozzle 4, which are too large to pass under the front edge of the suction nozzle 4. In other embodiments, there may be no such bottle flap 9.
  • Fig. 3 is a perspective view of the sweeping and suction unit 3 of the road sweeper 1 showed in Figs. 1 and 2 further illustrating the arrangement of the brushes 6 and the suction nozzle 4 relative to each other.
  • Fig. 4 is a bottom view of the same sweeping and suction unit 1, in which a plurality of air inlet channels 10 are arranged within the periphery of the nozzle orifice.
  • Figs. 5a and 5b are bottom views of the suction nozzle 4 alone. The only difference between the two figures is that in Fig. 5b a number of arrows are added to indicate the paths and directions of airflows 11, 12 entering the suction nozzle 4 along the surface to be cleaned, when a vacuum is generated within the dirt container 2 and the orifice of the suction nozzle 4 is placed against this surface.
  • a plurality of substantially parallel airflows 12 are sucked into the suction nozzle 4 from the front thereof.
  • These airflows 12 from the front typically carry a certain amount of dirt and small items swept into the airflows 12 by brushes 6 arranged in front of the suction nozzle 4, if such brushes 6 are present in the given embodiment.
  • a plurality of tangential airflows 11 enter the suction nozzle 4 through the air inlet channels 10 illustrated in Figs. 4 and 5a .
  • the term "tangential airflow" is used because the air inlet channels 10 are arranged in such a way that the airflows 11 entering the suction nozzle through the air inlet channels 10 all have directions, which are substantially tangential to the opening of the suction hose 5 into the suction nozzle 4. This means that all these tangential airflows 11 contribute to forming and strengthening a whirlwind 8, which begins near the surface to be cleaned and continues into the suction hose 5 towards the dirt container 2.
  • the rotation of the whirlwind 8 can be clockwise or anticlockwise depending on the design of the suction nozzle 4.
  • the formation of the whirlwind 8 results in larger air velocities within the suction nozzle 4 relative to the surface to be cleaned and increases the ability of the cleaning device 1 to lift up particles and small items from the surface and suck them into the suction hose 5 and further into the dirt container 2.
  • the illustrated suction nozzle 4 is designed with a permanent opening along its front side allowing particles and smaller items to be sucked into the suction nozzle 4. Heavier items such as stones are typically lifted up and sucked into the whirlwind 8 and the suction hose 5 only after the suction nozzle 4 has been placed above the item.
  • the air inlet channels 10 direct the entering airflows 11, 14, 15 so that they contribute to forming and strengthening a whirlwind 8 within the suction nozzle 4 continuing into the suction hose 5.
  • the incoming tangential airflows 11, 14, 15 can be directed towards points within and/or outside the periphery of the opening of the suction hose 5 into the suction nozzle 4.
  • the optimal number and size of the air inlet channels 10 depends on the size of the suction nozzle 4 and on the available vacuum and airflow into the dirt container 2 generated, for instance, by a suction wheel 7. If, for instance, there are too many air inlet channels 10 and the rotational velocity of the whirlwind 8 becomes too high, heavier items can be thrown out of the whirlwind 8 inside the suction nozzle 4 before they are sucked into the suction hose 5.
  • the sides and rear part of the suction nozzle 4 are arranged to slide against the surface to be cleaned.
  • the suction nozzle 4 is provided with wheels 13 in order to reduce the friction against the surface to be cleaned as well as the wear on the suction nozzle 4. In such embodiments, there will inevitably be a certain gap between the suction nozzle 4 and the surface to be cleaned.
  • Fig. 6 is a bottom view of the front part of the road sweeper 1 with indications of the directions of the airflows 8, 11, 12 into and through the suction nozzle 4 thereof.
  • Fig. 7 is a perspective view of the suction nozzle 4 with indications of the directions of the airflows 8, 11, 12 into and through the suction nozzle 4.
  • Figs. 8a and 8b are cross-sectional views of the suction nozzle 4 with and without indications of the directions of some of the airflows 8, 11, 12 into and through the suction nozzle 4 and further into the suction hose 5, respectively.
  • Fig. 9 is a perspective view of a suction nozzle 4 according to another embodiment of the invention, which is further provided with air inlet channels for tangential airflows 14, 15 entering the suction nozzle 4 through the side and the top thereof, respectively.
  • the directions of these tangential airflows 14, 15 also comprise a downward directed component because the air entering the suction nozzle 4 through these air inlet channels must move down to the surface to be cleaned before it can be sucked into the whirlwind 8 from the bottom thereof as described above.
  • Tangential airflows 14, 15 entering the suction nozzle 4 through the side or top thereof rather than along the surface to be cleaned can be used for strengthening the whirlwind 8 and increasing its rotational velocity, which can be advantageously if it is difficult to find sufficient space for the necessary air inlet channels 10 along the periphery of the nozzle orifice.
  • the auxiliary tangential airflows 14, 15 can be directed to meet the whirlwind 8 at points slightly within the periphery thereof.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Cleaning In General (AREA)

Claims (8)

  1. Saugdüse (4) zur Verbindung mit einem Schmutzbehälter (2) einer Reinigungsvorrichtung (1) durch einen Saugschlauch (5), wobei die Saugdüse einen oder mehrere Einlasskanäle (10) aufweist, die den Eintritt von Luftströmungen (11) durch diese Einlasskanäle in die Saugdüse bewirken, wenn ein Vakuum im Schmutzbehälter und/oder im Saugschlauch erzeugt wird und die Düsenöffnung gegen eine zu reinigende Oberfläche platziert wird, in Richtungen, die im Wesentlichen parallel zu der zu reinigenden Oberfläche und im Wesentlichen tangential zu der Öffnung des Saugschlauches in die Saugdüse sind, wodurch ein Wirbelwind (8) in der Saugdüse gebildet wird, der sich zumindest teilweise durch den Saugschlauch bis zum Schmutzbehälter fortsetzt, dadurch gekennzeichnet dass
    die Saugdüse so gestaltet ist, dass ihre Vorderseite so gestaltet ist, dass eine oder mehrere im Wesentlichen parallel entgegenkommende Luftströmungen in die Saugdüse durch die und/oder unter der Vorderseite entlang ihrer im Wesentlichen gesamten Breite eintreten, wenn ein Vakuum in dem Schmutzbehälter und/oder in dem Saugschlauch erzeugt wird und die Saugdüse mit der Vorderseite zuerst über eine zu reinigende Oberfläche bewegt wird.
  2. Reinigungsvorrichtung (1) zur Reinigung von Innen- und/oder Außenbereichen, wobei die Reinigungsvorrichtung Folgendes umfasst:
    eine Saugdüse (4) gemäß Anspruch 1, die durch einen Saugschlauch (5) mit einem Schmutzbehälter (2) verbunden ist und
    ein Vakuum erzeugendes Mittel, wie zum Beispiel ein Saugrad (7), zur Erzeugung eines Vakuums in dem Schmutzbehälter und/oder in dem Saugschlauch, wobei, wenn ein Vakuum in dem Schmutzbehälter und/oder in dem Saugschlauch erzeugt wird und die Düsenöffnung gegen eine zu reinigende Oberfläche platziert wird, Schmutz in Form von Teilchen und kleineren Gegenständen durch die Saugdüse von der Oberfläche abgehoben werden und durch den Saugschlauch in den Schmutzbehälter gesaugt werden kann.
  3. Reinigungsvorrichtung nach Anspruch 2, die eine Vielzahl von Lufteinlasskanälen umfasst, die angeordnet sind, um Luftströmungen in der Saugdüse in Richtungen zu erzeugen, die im Wesentlichen parallel zu der zu reinigenden Oberfläche und im Wesentlichen tangential zur Öffnung des Saugschlauchs in die Saugdüse sind, wobei die Lufteinlasskanäle vorzugsweise entlang aller Seiten der Saugdüse außer der Vorderseite verteilt sind.
  4. Reinigungsvorrichtung nach Anspruch 2 oder 3, die ferner einen oder mehrere Lufteinlasskanäle (14, 15) umfasst, die in einer Seitenwand und/oder einer Oberseite der Saugdüse derart angeordnet sind, dass, wenn ein Vakuum im Schmutzbehälter und/oder im Saugschlauch erzeugt wird und die Düsenöffnung gegen eine zu reinigende Oberfläche platziert wird, ein Luftstrom durch den Lufteinlasskanal in eine Richtung in die Saugdüse eintritt, die gegen die Düsenöffnung geneigt und im Wesentlichen tangential zur Öffnung des Saugschlauchs in die Saugdüse ist.
  5. Reinigungsvorrichtung nach einem der Ansprüche 2 bis 4, die ferner eine oder mehrere bewegliche, vorzugsweise drehbare Bürsten (6) umfasst, die zumindest teilweise vor der Saugdüse angeordnet sind, wobei die Bürsten angeordnet sind, um Schmutz in Richtung der Vorderseite der Saugdüse zu kehren, d.h. in den einen oder die mehreren Luftströme, die durch die und/oder unter der Vorderseite in die Saugdüse eintreten.
  6. Reinigungsvorrichtung nach einem der Ansprüche 2 bis 5, wobei die Reinigungsvorrichtung eine selbstfahrende Straßenkehrmaschine ist.
  7. Reinigungsvorrichtung nach einem der Ansprüche 2 bis 5, wobei die Reinigungsvorrichtung ein Staubsauger ist.
  8. Verfahren zur Erzielung einer verbesserten Saugwirkung einer Reinigungsvorrichtung (1), die Folgendes umfasst:
    eine Saugdüse (4), die durch einen Saugschlauch (5) mit einem Schmutzbehälter (2) verbunden ist und
    ein Vakuum erzeugendes Mittel, wie zum Beispiel ein Saugrad (7), zur Erzeugung eines Vakuums in dem Schmutzbehälter und/oder in dem Saugschlauch, wobei das Verfahren die folgenden Schritte umfasst:
    - Erzeugen eines Vakuums in dem Schmutzbehälter und/oder in dem Saugschlauch, wodurch Schmutz in Form von Teilchen und kleineren Gegenständen durch die Saugdüse von der Oberfläche abgehoben werden kann und durch den Saugschlauch in den Schmutzbehälter gesaugt wird
    - Platzieren der Düsenöffnung an der zu reinigenden Oberfläche
    - Ausbilden eines Wirbelwindes (8) innerhalb der Saugdüse, der sich zumindest teilweise durch den Saugschlauch zum Schmutzbehälter fortsetzt,
    wobei der Wirbelwind dadurch gebildet wird, dass die Saugdüse einen oder mehrere Lufteinlasskanäle (10) aufweist, die so angeordnet sind, dass die durch diese Lufteinlasskanäle in die Saugdüse eintretenden Luftströme (11) Richtungen aufweisen, die im Wesentlichen parallel zur zu reinigenden Fläche und im Wesentlichen tangential zur Öffnung des Saugschlauchs in die Saugdüse sind, und
    wobei die Saugdüse so gestaltet ist, dass ihre Vorderseite so gestaltet ist, dass eine oder mehrere im Wesentlichen parallel entgegenkommende Luftströmungen in die Saugdüse durch die und/oder unter der Vorderseite entlang ihrer im Wesentlichen gesamten Breite eintreten, wenn ein Vakuum in dem Schmutzbehälter und/oder in dem Saugschlauch erzeugt wird und die Saugdüse mit der Vorderseite zuerst über eine zu reinigende Oberfläche bewegt wird.
EP16706305.6A 2015-03-31 2016-02-17 Reinigungsvorrichtung mit verwendung von ansaugung mit einem wirbelwindeffekt Active EP3277887B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA201570191A DK178772B1 (en) 2015-03-31 2015-03-31 A cleaning device using suction with a whirlwind effect
PCT/DK2016/050046 WO2016155738A1 (en) 2015-03-31 2016-02-17 A cleaning device using suction with a whirlwind effect

Publications (2)

Publication Number Publication Date
EP3277887A1 EP3277887A1 (de) 2018-02-07
EP3277887B1 true EP3277887B1 (de) 2019-03-27

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EP16706305.6A Active EP3277887B1 (de) 2015-03-31 2016-02-17 Reinigungsvorrichtung mit verwendung von ansaugung mit einem wirbelwindeffekt

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EP (1) EP3277887B1 (de)
DK (1) DK178772B1 (de)
WO (1) WO2016155738A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109008822A (zh) * 2018-09-04 2018-12-18 厦门建霖健康家居股份有限公司 一种可自动清理集尘盒的扫地机器装置及清理方法
CN109183696A (zh) * 2018-10-13 2019-01-11 广东嗨学云教育科技有限公司 一种全自动路面清扫装置
CN113774843B (zh) * 2020-06-09 2022-08-12 广东博智林机器人有限公司 清洁设备

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US2027543A (en) * 1933-10-07 1936-01-14 Electrolux Corp Suction nozzle
AT222082B (de) * 1960-03-12 1962-07-10 Elfriede Lorenian Staubsaugermundstück
DE3316953A1 (de) * 1983-05-09 1984-11-15 Kuka Umwelttechnik GmbH, 8900 Augsburg Vorrichtung zum reinigen von strassenoberflaechen od. dgl.
DE3435661A1 (de) * 1984-09-28 1986-04-03 Wilhelm 6000 Frankfurt Schuster Saugerduese
JPH08107860A (ja) * 1994-10-07 1996-04-30 Hitachi Ltd 電気掃除機の吸口体
US5839157A (en) * 1996-05-06 1998-11-24 Elgin Sweeper Company Street sweeper pick-up head
AU2003273643A1 (en) * 2003-10-14 2005-04-27 Lange Christian S.A. Suction nozzle
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GB0426710D0 (en) * 2004-12-06 2005-01-12 Applied Sweepers Ltd Dust control system
DE202010013737U1 (de) * 2010-09-29 2010-12-02 Engelberg, Franz, Prof. Dr.-Ing. Polsterblasdüse
CN102767151B (zh) * 2012-07-31 2015-01-21 中联重科股份有限公司 清洁用吸嘴和清洁车
CN103572728B (zh) * 2013-11-01 2015-08-12 中联重科股份有限公司 旋风吸嘴和清洁车

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Publication number Publication date
DK178772B1 (en) 2017-01-09
WO2016155738A1 (en) 2016-10-06
EP3277887A1 (de) 2018-02-07
DK201570191A1 (en) 2016-10-10

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