EP3095368B1 - Hard ground nozzle for fine material and fine dust capture - Google Patents

Hard ground nozzle for fine material and fine dust capture Download PDF

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Publication number
EP3095368B1
EP3095368B1 EP16168561.5A EP16168561A EP3095368B1 EP 3095368 B1 EP3095368 B1 EP 3095368B1 EP 16168561 A EP16168561 A EP 16168561A EP 3095368 B1 EP3095368 B1 EP 3095368B1
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EP
European Patent Office
Prior art keywords
suction
sealing means
suction mouth
suction nozzle
central
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.)
Active
Application number
EP16168561.5A
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German (de)
French (fr)
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EP3095368A1 (en
Inventor
Markus Cornelissen
Dominik Diesch
Dirk Hellrung
Frank Lichtenauer
Jörg Sommer
Mathias Varnhorst
Jürgen ZILS
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Vorwerk and Co Interholding GmbH
Original Assignee
Vorwerk and Co Interholding GmbH
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Publication date
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Publication of EP3095368A1 publication Critical patent/EP3095368A1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/02—Nozzles
    • A47L9/06—Nozzles with fixed, e.g. adjustably fixed brushes or the like
    • A47L9/0693—Specially shaped nozzles, e.g. for cleaning radiators, tubes, fans or the like; Dusters
    • 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
    • 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
    • A47L9/0081—Means for exhaust-air diffusion; Means for sound or vibration damping

Definitions

  • the invention relates to a suction nozzle for a vacuum cleaner for sucking up dirt and / or dust from a floor by means of a suction air flow with a housing, a suction space formed within the housing, a suction channel opening into the suction space for guiding the suction air flow and an opening at the bottom of the suction space formed suction mouth, wherein the suction mouth has a central suction mouth portion and two side suction mouth portions flanking the central suction mouth portion, and wherein the central suction mouth portion is designed such that the width of the central suction mouth portion increases from the suction channel to the front of the suction nozzle and the height of the central one Suction mouth section from the suction channel to the front of the suction nozzle with an angle of ⁇ 6 ° and ⁇ 10 °.
  • Suction nozzles also referred to as attachments, abbreviated as nozzles or, depending on the intended use, as hard floor or carpet nozzles, are known from practice and are generally used together with a vacuum cleaner to vacuum up dirt and / or dust from a floor.
  • Vacuum cleaners with such suction nozzles regularly have a basic housing in which an electrically operated suction blower motor is arranged to build up a suction air flow.
  • the suction nozzle is typically connected to the vacuum cleaner in a flow-tight manner via a flexible suction hose and / or a handling tube. With suction robots, the suction nozzle is generally integrated into the basic housing itself.
  • a row of bristles or the like is often provided on the suction nozzle for loosening dirt and / or dust from a floor.
  • the dust and / or dirt detached from the floor in this way is entrained by the suction air flow and is usually separated out in a dust collection bag arranged in the basic housing in a dust filter bag.
  • suction nozzles optimized for receiving coarse material are known from the prior art, while other suction nozzles are designed for particularly good absorption of fine dust.
  • hard floor nozzles are often not designed to suck up coarse material, while there are further suction nozzles that can be switched manually between the intake of coarse material and fine dust using a foot switch. By pressing the foot switch, a bristle strip is often extended from the suction nozzle, increasing the distance between the suction nozzle and the floor, so that coarse material can be better picked up or suctioned off.
  • suction nozzles known from the prior art either meet only one of the competing and therefore opposite requirements, that is to say are either predestined for the collection of coarse material or fine dust, or else have to be manually switched between different operating modes by the operator.
  • a suction nozzle for a vacuum cleaner which has a central suction mouth which widens in a V-shape in the working direction of the suction nozzle, both front slots and side slots being formed on the suction mouth, through which the suction air flow generated by the vacuum cleaner can get into the suction mouth.
  • the slots are configured as incisions in the front or lateral web-shaped boundary of the suction nozzle.
  • a suction nozzle which can be used universally for picking up dirt and / or dust of different particle sizes and which is distinguished in particular by a particularly good pickup of coarse material and by a low noise emission.
  • the suction nozzle should allow both coarse material and fine dust to be picked up without having to manually switch an operating mode of the suction nozzle.
  • it is desirable that such a suction nozzle is characterized by a low pushing force.
  • a suction nozzle for a vacuum cleaner for sucking up dirt and / or dust from a floor by means of a suction air flow with a housing, a suction space formed within the housing, a suction channel opening into the suction space for guiding the suction air flow and an as Bottom opening of the suction chamber formed suction mouth, wherein the suction mouth has a central suction mouth portion and two side suction mouth portions flanking the central suction mouth portion, and the central suction mouth portion is designed such that the width of the central suction mouth portion increases from the suction channel to the front of the suction nozzle and the Height of the central suction mouth section from the suction channel to the front of the suction nozzle drops at an angle of ⁇ 6 ° and ⁇ 10 °, with a means for acoustically shielding the suction air flow in the central suction mouth section in the suction air flow direction between the Vo rear side of the suction nozzle and the suction channel is arranged.
  • An essential point of the invention lies in the division of the suction mouth into the central suction mouth section and the two side suction mouth sections, so that separate areas for the reception of fine dust, in particular through the side suction mouth sections, and for coarse material, in particular through the central suction mouth section, are created.
  • the proposed configuration of the central suction mouth section with a width that increases from the suction channel to the front of the suction nozzle, for example with a V-shaped configuration in plan view, and with a height that drops off at an angle of 6 6 ° and 10 10 °, allows coarse material are deflected in an advantageous manner in the preliminary stroke in such a way that it also mechanically moves in addition to the air flow direction Suction channel is supplied.
  • the central suction mouth section acts as a flow diffuser due to its decreasing height, so that, compared to configurations known from the prior art, a substantially better coarse material pickup is achieved.
  • the terminology chosen here for describing the arrangement of the parts of the suction nozzle is such that the position and orientation of the suction nozzle are assumed, as is also the case in operation when vacuuming a floor, in which the suction nozzle is placed on the floor and moves over it becomes.
  • the suction nozzle has a means for acoustically shielding the suction air flow, which is arranged in the central suction mouth section in the direction of the suction air flow between the front of the suction nozzle and the suction channel.
  • a front flow sealing means is provided which is designed and arranged to at least partially limit the central suction mouth section on the front of the suction nozzle.
  • the noise emission of the suction nozzle can be reduced by providing the means for acoustic shielding and / or the front flow sealing means.
  • the configuration and / or dimensioning of the means for acoustic shielding and / or the front flow sealing means is preferred such that the suction nozzle meets the requirements of the Ecodesign Regulation (EU) No. 666/2013 for vacuum cleaners and / or that the volume caused by the suction air flow during suction operation of the floor nozzle is no more than 80 dB (A).
  • the width of the central suction mouth section increases linearly, step-like and / or in a curve shape
  • the height of the central suction mouth section decreases linearly, step-like and / or in a curve shape and / or the height decreases with a Angle drops by 8 °.
  • the combination of a linearly decreasing height at an angle of 8 ° has proven to be particularly advantageous.
  • the front flow sealing means is designed in two parts, the means for acoustic shielding being arranged between the two parts along the front of the suction nozzle.
  • the means for acoustic shielding is configured by two bristle strips extending approximately 5 cm long, which are arranged offset on the housing at an angle of approximately 30 ° to one another.
  • the means for acoustic shielding is preferably framed on both sides by a part of the front flow sealing means in such a way that direct sound emission from the suction channel to the front is reduced and prevented as far as possible.
  • the lateral suction mouth sections are each limited by inner and outer lateral flow sealing means extending from the suction channel to the sides of the suction nozzle in such a way that the central suction mouth section is limited by the inner lateral flow sealing means of the respective lateral suction mouth sections.
  • the inner and outer flow sealing means can in principle be configured as desired to seal the suction air flow, but preferably the lateral flow sealing means are designed as bristle strips, as a single or multi-row arrangement of bristle tufts, as a sealing lip and / or as a combination thereof.
  • the lateral flow sealing means can be formed at least in part by the housing, for example by projections or walls protruding from the housing in the direction of the floor. More preferably, the inner and outer lateral flow sealing means between the suction channel and the side of the suction nozzle extend approximately or essentially parallel to one another.
  • the cross section of the lateral suction mouth section (suction air duct) in the region of the suction duct preferably has an outlet opening with a width of 60 60 mm, 50 50 mm, 40 40 mm, 35 35 mm, 33mm, 30 30 mm or 20 20 mm, the height the outlet opening is preferably 50 50 mm, 40 40 mm, 30 30 mm, 22 mm, 20 20 mm or 10 10 mm.
  • the width of an inlet opening of the lateral suction air duct is preferably 50 50 mm, 40 40 mm, 35 35 mm, 25 mm, 20 20 mm or 10 10 mm, the height of the inlet opening preferably ⁇ 20 mm,.
  • an air passage is formed on the suction channel between the two lateral suction mouth sections, through which a proportion of 40 40% and 65 65% of the suction air flow flows through the central suction mouth section.
  • the opening width of the air passage is preferably 25 mm, 30 mm, 32 mm, 37 mm, 40 mm or 45 mm.
  • the width of the central suction mouth section at the front of the suction nozzle is preferably the same or approximately the same as the width of the suction nozzle.
  • the lateral suction mouth sections extend almost linearly away from the suction channel to the sides of the base area or the suction space, but it is also possible for the suction mouth sections (suction air channels) to bend and / or curve from the suction channel extend away to the side of the base.
  • the bristles or the sealing lips preferably extend vertically away from the housing towards the floor and are designed to be flexible, so that when the suction nozzle is moved in the usual direction of displacement, coarse material or fine dust located on the floor under the bristles or the sealing lips into the central suction mouth section and / or the side suction mouth sections can reach.
  • the two inner flow sealing means preferably limit the passage of the suction air flow between the suction channel and the central suction mouth section.
  • the front flow sealing means is designed to be pivotable into the suction space and is dimensioned such that the front flow sealing means can be pivoted completely into the suction space without touching an inner lateral flow sealing means. In this way it can be ensured that after passing the coarse material, the front flow sealing means can return to the non-pivoted starting position unhindered.
  • the front flow sealing means has a rectangular shape, the front flow sealing means extending from the housing, with the suction nozzle placed on the floor, to the floor, rounded on a side facing away from the side flow sealing means and / or the housing , the front flow sealant first extends from the housing to the floor extending and an adjoining second region, the second region being characterized by a lower strength compared to the first region and / or the front flow sealing means, when the suction nozzle is placed on the floor, angled in the direction of the suction chamber in relation to the normal of the floor (in the sense of angled) is arranged.
  • the front flow sealing means is preferably angled at an angle in the forward stroke direction such that coarse material located outside the central suction mouth section can be transported into the central suction mouth section even without suction air flow and only due to a movement of the suction nozzle in the forward stroke direction.
  • the front flow sealing means is designed such that a gap is formed between the front flow sealing means and the two inner lateral flow sealing means. The gap preferably extends over at least 50 mm.
  • the means for acoustic shielding has a V-like or part-circle shape that opens to a rear side of the suction nozzle and / or the means for acoustic shielding is made of plastic and / or if a front flow sealing means is provided , is made of a material that is harder than the front flow sealing means.
  • the front flow sealing means is designed as a plurality of means for acoustically shielding the suction air flow, the means for acoustically shielding the suction air flow being arranged along the front of the housing.
  • the front flow sealing means is arranged between the suction channel and the front of the housing at a distance from the front or is arranged on the front at an edge of the housing and / or extends parallel to the front.
  • the suction mouth and / or the central suction mouth section has a shape in the manner of an isosceles triangle, the suction channel preferably opening into the suction space formed in the region of the tip between the legs of the triangle, the central suction mouth section extending from the suction channel to extends to the base of the isosceles triangle and the lateral suction mouth sections extend from the suction channel along the respective legs of the isosceles triangle to the corners of the isosceles triangle arranged opposite the tip.
  • a coarse material area formed by the central suction mouth section is arranged in the preliminary stroke of the suction nozzle essentially in front of the fine dust area formed by the lateral suction mouth sections, the lateral suction mouth sections adjoining the central suction mouth section at the corners of the isosceles triangle opposite the tip.
  • fine dust absorption is advantageously made possible at least in corner areas of the suction nozzle and up to the front of the suction nozzle.
  • the two lateral suction mouth sections each extend away from the suction channel to one side of the suction nozzle in such a way that 45 ° ⁇ ⁇ gilt 160 °, preferably 90 ° ⁇ ⁇ gilt, applies to the angle ⁇ between the longitudinal extension directions of the two side suction mouth sections 135 °, very particularly preferably ⁇ approximately equal to 135 °, or the two lateral suction mouth sections extend away from the suction channel in a curve.
  • the central suction mouth section preferably has a triangular shape in the manner of an isosceles triangle, the Base is oriented towards the front of the suction nozzle.
  • the suction mouth has a further central suction mouth section and two further the further central suction mouth section flanking lateral suction mouth sections, wherein the central suction mouth section and the further central suction mouth section extend in opposite directions away from the suction channel in such a way that the two side suction mouth sections and the two further lateral suction mouth sections form an X-shaped arrangement.
  • a suction nozzle designed in this way can accommodate coarse material both in the forward stroke and in the return stroke.
  • the suction nozzle is preferably configured symmetrically, in particular mirror-symmetrically, in the forward stroke and in the return stroke.
  • the suction channel further preferably represents the center point of this embodiment, from which the central suction mouth section with the two lateral suction mouth sections and in particular mirror-symmetrically opposite the further central suction mouth section with the further lateral suction mouth sections extend.
  • Fig. 1 and 2nd show the schematic bottom view of a suction nozzle, also called floor nozzle, according to a preferred embodiment of the invention.
  • the suction nozzle has a housing 1 made of plastic, on which a base plate 2 is formed on the base side.
  • a suction space 3 is formed below the base plate 2, in which a suction channel 4 opens and which forms a suction mouth 5 as an opening on the bottom.
  • the bottom plate 2 and the suction mouth 5 has a shape in the manner of an isosceles triangle, the base 6a of which in the forward stroke direction represents the front of the suction nozzle.
  • the suction channel 4 is connected in a flow-tight manner to a connection piece, not shown, provided on the upper side of the housing 1.
  • a handling tube and / or a flexible hose can be connected in a flow-tight manner to a basic housing of a vacuum cleaner, in which an electrically operated suction fan motor is arranged to build up a suction air flow.
  • dirt and / or dust entrained by the suction air flow from the floor to be cleaned can be separated in a dust filter bag.
  • the suction mouth 5 has a central suction mouth section 6 and two lateral suction mouth sections 7 flanking or enclosing the central suction mouth section 6.
  • the lateral suction mouth sections 7 extend linearly from the suction channel 4 to a corner 7a of the isosceles triangle, so that the angle ⁇ between the longitudinal directions of the two lateral suction mouth sections 7 is 135 °.
  • the lateral suction mouth sections 7 are limited by inner and outer lateral flow sealing means 8.
  • the outer lateral flow sealing means 8 extend from a respective corner 7a of the isosceles triangle along the respective leg and merge into a partial circle between the two legs, partially delimiting the suction channel 4 .
  • the complete rear side of the suction nozzle is delimited by external lateral flow sealing means 8, which are configured here as a row of bristles.
  • the inner lateral flow sealing means 8 extend approximately parallel to the outer lateral flow sealing means 8 away from the suction channel 4 in the direction of the corners 7a in such a way that an air passage 9 for the suction air flow is formed on the suction channel 4 between the two inner lateral flow sealing means 8.
  • the air passage 9 has in the present case a width of approximately 32 mm, while the two lateral suction mouth sections 7 each have a width of approximately 33 mm in the area of the suction channel 4.
  • the aforementioned dimensioning ensures that a portion of approximately 45% of the suction air flow from the suction channel 4 flows through the central suction mouth section 6, while the remaining portion of approximately 55% is evenly divided between the two side suction mouth sections 7.
  • the central suction mouth section 6 has an isosceles triangle shape, the two inner lateral flow sealing means 8 delimiting the legs of the central suction mouth section 6 in a flow-tight manner.
  • the air passage 9 to the suction channel 4 is arranged at the tip of the central suction mouth section 6, while a front flow sealing means 11 is provided opposite the base 6a and coinciding with the front of the suction nozzle for at least partially sealing the central suction mouth section 6.
  • the central suction mouth section 6 increases on the one hand in a funnel or V shape in its width from the suction channel 4 linearly towards the base 6a or front of the suction nozzle, on the other hand the height of the central suction mouth section 6 linearly towards the base from the suction channel 4 6a or the front of the suction nozzle drops at an angle of approx. 8 °.
  • the central suction mouth section 6 acts as a type of flow diffuser, so that the central suction mouth section 6 configured in this way makes it particularly easy to receive coarse material.
  • the front flow sealing means 11 is designed as a flexible sealing lip so that coarse material can pass through the sealing lip.
  • the coarse material arriving in the central suction mouth section 6 is captured by the suction air flow and sucked through the suction channel 4.
  • the front flow sealing means 11 extends from the base plate 2 to the floor, but a gap of approximately 50 mm is formed laterally between the front flow sealing means 11 and the corners 7a of the suction nozzle. So that can be as Front flow sealing means 11 designed to swivel the sealing lip pivot when driving over coarse material into the suction space 3 without touching the inner lateral flow sealing means 8.
  • a means for acoustic shielding 12 is provided to further reduce the noise emission, which means, in the representations of FIGS Figures 1 and 2nd , is designed as a single piece with the housing 1, V-shaped bar, which is oriented from the base plate 2 to the floor, but without touching the floor.
  • the acoustic shielding means 12 configured in this way is arranged in the central suction mouth section 6 in the direction of suction air flow between the base 6a forming the front of the suction nozzle and the suction channel 4.
  • the means for acoustic shielding 12 can also be arranged on the front of the central suction mouth section 6 or on the front of the suction nozzle between parts of the front flow sealing means 11.
  • the front flow sealing means 11 can be designed by a plurality of means for acoustic shielding 12, which are arranged one behind the other on the front side of the central suction mouth section 6 transversely to the direction of the forward stroke.
  • the distance between the front flow sealing means 11 and the means for acoustic shielding 12 is approximately 15 mm, while the distance between the means for acoustic shielding 12 and the inner lateral flow sealing means 8 is in each case approximately 22 mm.
  • the means for acoustic shielding 12 can also be made from two bristle strips which extend approximately 5 cm long and are arranged at an angle of approximately 30 ° to one another on the base plate 2 such that direct sound emission from the suction channel 4 to the Front of the suction nozzle is at least limited.
  • the proposed design of the central suction mouth section with a width widening from the suction channel to the front of the suction nozzle and with a height falling at an angle of ⁇ 6 ° and ⁇ 10 ° enables particularly efficient suction of both fine dust and coarse material , without, as with the configurations known from the prior art, a manual switchover between fine dust and coarse material is necessary. Due to the experimentally confirmed dimensioning of the lateral suction mouth sections 7, a high flow speed and in this respect a large volume flow is also achieved, which also leads to very good and efficient fine dust pick-up. Since the suction mouth 5 has a comparatively small area subject to negative pressure, the embodiment described above is characterized by a low pushing force.
  • the suction nozzle is also distinguished by a very efficient coarse material pickup, with only a low noise emission due to the means for acoustic shielding 12 and due to the front flow sealing means 11.

Description

Die Erfindung betrifft eine Saugdüse für einen Staubsauger zum Aufsaugen von Schmutz und/oder Staub von einem Boden mittels einer Saugluftströmung mit einem Gehäuse, einem innerhalb des Gehäuses gebildeten Saugraum, einem in den Saugraum mündenden Saugkanal zum Führen der Saugluftströmung und einem als bodenseitige Öffnung des Saugraums ausgebildeten Saugmund, wobei der Saugmund einen zentralen Saugmundabschnitt und zwei den zentralen Saugmundabschnitt flankierende seitliche Saugmundabschnitte aufweist, und wobei der zentrale Saugmundabschnitt derart ausgestaltet ist, dass sich die Breite des zentralen Saugmundabschnitts von dem Saugkanal hin zu der Vorderseite der Saugdüse vergrößert und die Höhe des zentralen Saugmundabschnitts von dem Saugkanal hin zu der Vorderseite der Saugdüse mit einem Winkel von ≥ 6° und ≤ 10° abfällt.The invention relates to a suction nozzle for a vacuum cleaner for sucking up dirt and / or dust from a floor by means of a suction air flow with a housing, a suction space formed within the housing, a suction channel opening into the suction space for guiding the suction air flow and an opening at the bottom of the suction space formed suction mouth, wherein the suction mouth has a central suction mouth portion and two side suction mouth portions flanking the central suction mouth portion, and wherein the central suction mouth portion is designed such that the width of the central suction mouth portion increases from the suction channel to the front of the suction nozzle and the height of the central one Suction mouth section from the suction channel to the front of the suction nozzle with an angle of ≥ 6 ° and ≤ 10 °.

Saugdüsen, auch als Vorsatzgeräte, abgekürzt als Düsen oder in Abhängigkeit vom Einsatzzweck als Hartboden- oder Teppichdüsen bezeichnet, sind aus der Praxis bekannt und werden in der Regel zusammen mit einem Staubsauger zum Aufsaugen von Schmutz und/oder Staub von einem Boden verwendet. Staubsauger mit derartigen Saugdüsen verfügen regelmäßig über ein Grundgehäuse, in welchem ein elektrisch betriebener Sauggebläsemotor zum Aufbau einer Saugluftströmung angeordnet ist. Die Saugdüse wird typischerweise über einen flexiblen Saugschlauch und/oder ein Handhabungsrohr strömungsdicht mit dem Staubsauger verbunden. Bei Saugrobotern ist die Saugdüse im Allgemeinen in das Grundgehäuse selbst integriert. An der Saugdüse ist vielfach eine Borstenreihe oder dergleichen zum Lösen von Schmutz und/oder Staub von einem Boden vorgesehen. Der derart vom Boden abgelöste Staub und/oder Schmutz wird von der Saugluftströmung mitgerissen und zumeist in einem in dem Grundgehäuse angeordneten Staubsammelraum in einem Staubfilterbeutel abgesondert.Suction nozzles, also referred to as attachments, abbreviated as nozzles or, depending on the intended use, as hard floor or carpet nozzles, are known from practice and are generally used together with a vacuum cleaner to vacuum up dirt and / or dust from a floor. Vacuum cleaners with such suction nozzles regularly have a basic housing in which an electrically operated suction blower motor is arranged to build up a suction air flow. The suction nozzle is typically connected to the vacuum cleaner in a flow-tight manner via a flexible suction hose and / or a handling tube. With suction robots, the suction nozzle is generally integrated into the basic housing itself. A row of bristles or the like is often provided on the suction nozzle for loosening dirt and / or dust from a floor. The dust and / or dirt detached from the floor in this way is entrained by the suction air flow and is usually separated out in a dust collection bag arranged in the basic housing in a dust filter bag.

Bei dem von dem Boden abzureinigenden Schmutz bzw. Staub wird in Anlehnung an die jeweilige Partikelgröße zwischen Grobgut und Feinstaub unterschieden. Aus dem Stand der Technik sind einerseits zur Aufnahme von Grobgut optimierte Saugdüsen bekannt, während wieder andere Saugdüsen für eine besonders gute Aufnahme von Feinstaub ausgelegt sind. Beispielsweise sind Hartbodendüsen oftmals nicht zum Aufsaugen von Grobgut ausgestaltet, während weitere Saugdüsen existieren, die manuell mit Hilfe eines Fußtasters zwischen der Aufnahme von Grobgut und Feinstaub umschaltbar sind. Durch Betätigung des Fußtasters wird oftmals ein Borstenstreifen aus der Saugdüse ausgefahren, durch den der Abstand der Saugdüse zum Boden vergrößert wird, so dass Grobgut besser aufgenommen bzw. abgesaugt werden kann. Letztendlich ist es jedoch so, dass die aus dem Stand der Technik bekannten Saugdüsen entweder nur einer der konkurrierenden und insofern entgegengesetzten Anforderungen genügen, also entweder zur Grobgut- oder zur Feinstaubaufnahme prädestiniert sind, oder aber vom Bediener zwischen unterschiedlichen Betriebsmodi manuell umgeschaltet werden müssen.For the dirt or dust to be cleaned from the floor, a distinction is made between coarse material and fine dust based on the respective particle size. On the one hand, suction nozzles optimized for receiving coarse material are known from the prior art, while other suction nozzles are designed for particularly good absorption of fine dust. For example, hard floor nozzles are often not designed to suck up coarse material, while there are further suction nozzles that can be switched manually between the intake of coarse material and fine dust using a foot switch. By pressing the foot switch, a bristle strip is often extended from the suction nozzle, increasing the distance between the suction nozzle and the floor, so that coarse material can be better picked up or suctioned off. Ultimately, however, it is the case that the suction nozzles known from the prior art either meet only one of the competing and therefore opposite requirements, that is to say are either predestined for the collection of coarse material or fine dust, or else have to be manually switched between different operating modes by the operator.

Aus der US 2003/0140449 A1 ist eine Saugdüse für einen Staubsauger bekannt, die einen zentralen, sich in Arbeitsrichtung der Saugdüse V-förmig verbreiternden Saugmund aufweist, wobei an dem Saugmund sowohl vordere Schlitze als auch Seitenschlitze ausgebildet sind, durch welche der vom Staubsauger erzeugte Saugluftstrom in den Saugmund gelangen kann. Dabei sind die Schlitze als aneinander gereihte Einschnitte in der vorderen bzw. seitlichen stegförmigen Begrenzung der Saugdüse ausgebildet.From the US 2003/0140449 A1 a suction nozzle for a vacuum cleaner is known which has a central suction mouth which widens in a V-shape in the working direction of the suction nozzle, both front slots and side slots being formed on the suction mouth, through which the suction air flow generated by the vacuum cleaner can get into the suction mouth. The slots are configured as incisions in the front or lateral web-shaped boundary of the suction nozzle.

Ausgehend davon ist es eine Aufgabe der Erfindung, eine Saugdüse anzugeben, die zur Aufnahme von Schmutz und/oder Staub unterschiedlicher Partikelgröße universell einsetzbar ist und sich insbesondere durch eine besonders gute Aufnahme von Grobgut sowie durch eine geringe Lärmemission auszeichnet. Insbesondere soll die Saugdüse die Aufnahme sowohl von Grobgut als auch von Feinstaub erlauben, ohne dass dazu ein Betriebsmodus der Saugdüse manuell umgeschaltet werden muss. Darüber hinaus ist es wünschenswert, dass eine derartige Saugdüse durch eine geringe Schiebekraft gekennzeichnet ist.Based on this, it is an object of the invention to provide a suction nozzle which can be used universally for picking up dirt and / or dust of different particle sizes and which is distinguished in particular by a particularly good pickup of coarse material and by a low noise emission. In particular, the suction nozzle should allow both coarse material and fine dust to be picked up without having to manually switch an operating mode of the suction nozzle. In addition, it is desirable that such a suction nozzle is characterized by a low pushing force.

Die Lösung der Aufgabe erfolgt durch die Merkmale des unabhängigen Anspruchs 1. Vorteilhafte Ausgestaltungen sind in den Unteransprüchen angegeben.The object is achieved by the features of independent claim 1. Advantageous refinements are specified in the subclaims.

Demnach erfolgt die Lösung der Aufgabe durch eine Saugdüse für einen Staubsauger zum Aufsaugen von Schmutz und/oder Staub von einem Boden mittels einer Saugluftströmung mit einem Gehäuse, einem innerhalb des Gehäuses gebildeten Saugraum, einem in den Saugraum mündenden Saugkanal zum Führen der Saugluftströmung und einem als bodenseitige Öffnung des Saugraums ausgebildeten Saugmund, wobei der Saugmund einen zentralen Saugmundabschnitt und zwei den zentralen Saugmundabschnitt flankierende seitliche Saugmundabschnitte aufweist, und der zentrale Saugmundabschnitt derart ausgestaltet ist, dass sich die Breite des zentralen Saugmundabschnitts von dem Saugkanal hin zu der Vorderseite der Saugdüse vergrößert und die Höhe des zentralen Saugmundabschnitts von dem Saugkanal hin zu der Vorderseite der Saugdüse mit einem Winkel von ≥ 6° und ≤ 10° abfällt, wobei ein Mittel zur akustischen Abschirmung der Saugluftströmung in dem zentralen Saugmundabschnitt in Saugluftströmungsrichtung zwischen der Vorderseite der Saugdüse und dem Saugkanal angeordnet ist.Accordingly, the problem is solved by a suction nozzle for a vacuum cleaner for sucking up dirt and / or dust from a floor by means of a suction air flow with a housing, a suction space formed within the housing, a suction channel opening into the suction space for guiding the suction air flow and an as Bottom opening of the suction chamber formed suction mouth, wherein the suction mouth has a central suction mouth portion and two side suction mouth portions flanking the central suction mouth portion, and the central suction mouth portion is designed such that the width of the central suction mouth portion increases from the suction channel to the front of the suction nozzle and the Height of the central suction mouth section from the suction channel to the front of the suction nozzle drops at an angle of ≥ 6 ° and ≤ 10 °, with a means for acoustically shielding the suction air flow in the central suction mouth section in the suction air flow direction between the Vo rear side of the suction nozzle and the suction channel is arranged.

Ein wesentlicher Punkt der Erfindung liegt in der Aufteilung des Saugmunds in den zentralen Saugmundabschnitt und die beiden seitlichen Saugmundabschnitte, so dass getrennte Bereiche für die Aufnahme von Feinstaub, insbesondere durch die seitlichen Saugmundabschnitte, und für Grobgut, insbesondere durch den zentralen Saugmundabschnitt, geschaffen werden. Durch die vorgeschlagene Ausgestaltung des zentralen Saugmundabschnitts mit einer sich von dem Saugkanal hin zu der Vorderseite der Saugdüse vergrößernden Breite, beispielsweise mit einer in Draufsicht v-förmigen Ausgestaltung, und mit einer in einem Winkel von ≥ 6° und ≤ 10° abfallenden Höhe kann Grobgut in vorteilhafter Weise im Vorhub so abgelenkt werden, dass es zusätzlich zur Luftströmungsrichtung auch mechanisch dem Saugkanal zugeführt wird. Neben einem derartigen "Trichtereffekt" wirkt der zentrale Saugmundabschnitt aufgrund seiner abfallenden Höhe als Strömungsdiffusor, so dass, im Vergleich zu aus dem Stand der Technik bekannten Ausgestaltungen, eine wesentlich bessere Grobgutaufnahme erreicht wird. Die durch die seitlichen Saugmundabschnitte und den zentralen Saugmundabschnitt hindurchführenden Saugluftströmungen treffen im Bereich des Saugkanals aufeinander, von wo die Saugluftströmung mit dem vom Boden aufgesaugten Schmutz bzw. Staub beispielsweise durch einen Anschlussstutzen aus der Saugdüse weggeführt wird. Die vorliegend gewählte Terminologie zur Beschreibung der Anordnung der Teile der Saugdüse ist derart, dass von einer Lage und Ausrichtung der Saugdüse ausgegangen wird, wie sie auch im Betriebsfall beim Saugen eines Bodens vorliegt, in dem die Saugdüse auf dem Boden aufgesetzt ist und über diesen bewegt wird.An essential point of the invention lies in the division of the suction mouth into the central suction mouth section and the two side suction mouth sections, so that separate areas for the reception of fine dust, in particular through the side suction mouth sections, and for coarse material, in particular through the central suction mouth section, are created. The proposed configuration of the central suction mouth section with a width that increases from the suction channel to the front of the suction nozzle, for example with a V-shaped configuration in plan view, and with a height that drops off at an angle of 6 6 ° and 10 10 °, allows coarse material are deflected in an advantageous manner in the preliminary stroke in such a way that it also mechanically moves in addition to the air flow direction Suction channel is supplied. In addition to such a "funnel effect", the central suction mouth section acts as a flow diffuser due to its decreasing height, so that, compared to configurations known from the prior art, a substantially better coarse material pickup is achieved. The suction air flows leading through the lateral suction mouth sections and the central suction mouth section meet in the area of the suction channel, from where the suction air flow with the dirt or dust sucked up from the floor is led away from the suction nozzle, for example through a connecting piece. The terminology chosen here for describing the arrangement of the parts of the suction nozzle is such that the position and orientation of the suction nozzle are assumed, as is also the case in operation when vacuuming a floor, in which the suction nozzle is placed on the floor and moves over it becomes.

Erfindungsgemäß weist die Saugdüse ein Mittel zur akustischen Abschirmung der Saugluftströmung auf, welches in dem zentralen Saugmundabschnitt in Saugluftströmungsrichtung zwischen der Vorderseite der Saugdüse und dem Saugkanal angeordnet ist.According to the invention, the suction nozzle has a means for acoustically shielding the suction air flow, which is arranged in the central suction mouth section in the direction of the suction air flow between the front of the suction nozzle and the suction channel.

Nach einer bevorzugten Weiterbildung ist ein vorderes Strömungsdichtungsmittel vorgesehen, welches ausgeführt und angeordnet ist, den zentralen Saugmundabschnitt an der Vorderseite der Saugdüse wenigstens abschnittsweise zu begrenzen. Insbesondere bei einer offeneren Geometrie des zentralen Saugmundabschnitts lässt sich durch Vorsehen des Mittels zur akustischen Abschirmung und/oder des vorderen Strömungsdichtungsmittels eine Reduzierung der Lärmemission der Saugdüse erreichen. Bevorzugt ist die Ausgestaltung und/oder Dimensionierung des Mittels zur akustischen Abschirmung und/oder des vorderen Strömungsdichtungsmittels derart, dass die Saugdüse die Vorgaben der Ökodesign-Verordnung (EU) Nr. 666/2013 für Staubsauger erfüllt und/oder dass die im Saugbetrieb der Bodendüse durch die Saugluftströmung verursachte Lautstärke nicht mehr als 80 dB (A) beträgt.According to a preferred development, a front flow sealing means is provided which is designed and arranged to at least partially limit the central suction mouth section on the front of the suction nozzle. In particular in the case of a more open geometry of the central suction mouth section, the noise emission of the suction nozzle can be reduced by providing the means for acoustic shielding and / or the front flow sealing means. The configuration and / or dimensioning of the means for acoustic shielding and / or the front flow sealing means is preferred such that the suction nozzle meets the requirements of the Ecodesign Regulation (EU) No. 666/2013 for vacuum cleaners and / or that the volume caused by the suction air flow during suction operation of the floor nozzle is no more than 80 dB (A).

Nach einer weiteren bevorzugten Weiterbildung der Saugdüse ist vorgesehen, dass sich die Breite des zentralen Saugmundabschnitts linear, stufenförmig und/oder in einer Kurvenform vergrößert, die Höhe des zentralen Saugmundabschnitts linear, stufenförmig und/oder in einer Kurvenform abfällt und/oder die Höhe mit einem Winkel von 8° abfällt. Besonders vorteilhaft hat sich die Kombination aus linear abfallender Höhe bei einem Winkel von 8° erwiesen.According to a further preferred development of the suction nozzle, it is provided that the width of the central suction mouth section increases linearly, step-like and / or in a curve shape, the height of the central suction mouth section decreases linearly, step-like and / or in a curve shape and / or the height decreases with a Angle drops by 8 °. The combination of a linearly decreasing height at an angle of 8 ° has proven to be particularly advantageous.

Nach einer ebenfalls bevorzugten Weiterbildung ist das vordere Strömungsdichtungsmittel zweigeteilt ausgestaltet, wobei das Mittel zur akustischen Abschirmung zwischen den beiden Teilen entlang der Vorderseite der Saugdüse angeordnet ist. Beispielsweise ist das Mittel zur akustischen Abschirmung durch zwei sich etwa 5 cm lang erstreckende Borstenstreifen ausgestaltet, die in einem Winkel von etwa 30° zueinander versetzt an dem Gehäuse angeordnet sind. In Erstreckungsrichtung senkrecht zum Vorhub ist das Mittel zur akustischen Abschirmung bevorzugt beidseitig durch je einen Teil des vorderen Strömungsdichtungsmittels derart eingerahmt, dass eine direkte Schallemission von dem Saugkanal hin zu der Vorderseite reduziert, möglichst verhindert ist.According to a likewise preferred development, the front flow sealing means is designed in two parts, the means for acoustic shielding being arranged between the two parts along the front of the suction nozzle. For example, the means for acoustic shielding is configured by two bristle strips extending approximately 5 cm long, which are arranged offset on the housing at an angle of approximately 30 ° to one another. In the direction of extension perpendicular to the forward stroke, the means for acoustic shielding is preferably framed on both sides by a part of the front flow sealing means in such a way that direct sound emission from the suction channel to the front is reduced and prevented as far as possible.

Nach einer besonders bevorzugten Weiterbildung sind die seitlichen Saugmundabschnitte jeweils durch sich von dem Saugkanal bis hin zu den Seiten der Saugdüse erstreckende innere und äußere seitliche Strömungsdichtungsmittel derart begrenzt, dass der zentrale Saugmundabschnitt durch die inneren seitlichen Strömungsdichtungsmittel der jeweiligen seitlichen Saugmundabschnitte begrenzt ist. Die inneren und äußeren Strömungsdichtungsmittel können grundsätzlich beliebig zum Abdichten der Saugluftströmung ausgestaltet sein, wobei jedoch bevorzugt die seitlichen Strömungsdichtungsmittel als Borstenstreifen, als ein- oder mehrreihige Anordnung von Borstenbüscheln, als Dichtungslippe und/oder als Kombination dessen ausgestaltet sind. Zudem können die seitlichen Strömungsdichtungsmittel wenigstens zum Teil durch das Gehäuse ausgeformt sein, beispielsweise durch von dem Gehäuse in Richtung Boden hervorstehende Auskragungen oder Wände. Weiter bevorzugt erstrecken sich die inneren und äußeren seitlichen Strömungsdichtungsmittel zwischen Saugkanal und Seite der Saugdüse in etwa oder im Wesentlichen parallel zueinander.According to a particularly preferred development, the lateral suction mouth sections are each limited by inner and outer lateral flow sealing means extending from the suction channel to the sides of the suction nozzle in such a way that the central suction mouth section is limited by the inner lateral flow sealing means of the respective lateral suction mouth sections. The inner and outer flow sealing means can in principle be configured as desired to seal the suction air flow, but preferably the lateral flow sealing means are designed as bristle strips, as a single or multi-row arrangement of bristle tufts, as a sealing lip and / or as a combination thereof. In addition, the lateral flow sealing means can be formed at least in part by the housing, for example by projections or walls protruding from the housing in the direction of the floor. More preferably, the inner and outer lateral flow sealing means between the suction channel and the side of the suction nozzle extend approximately or essentially parallel to one another.

Bevorzugt weist der Querschnitt des seitlichen Saugmundabschnitts (Saugluftkanals) im Bereich des Saugkanals eine Austrittsöffnung mit einer Breite von ≤ 60 mm, ≤ 50 mm, ≤ 40 mm, ≤ 35 mm, 33mm, ≥ 30 mm oder ≥ 20 mm auf, wobei die Höhe der Austrittsöffnung bevorzugt ≤ 50 mm, ≤ 40 mm, ≤ 30 mm, 22 mm, ≥ 20 mm oder ≥ 10 mm ist. An der Seite einer Grundfläche des Gehäuses ist die Breite einer Eintrittsöffnung des seitlichen Saugluftkanals bevorzugt ≤ 50 mm, ≤ 40 mm, ≤ 35 mm, 25 mm, ≥ 20 mm oder ≥ 10 mm, wobei die Höhe der Eintrittsöffnung bevorzugt ≤ 20 mm, ≤ 10 mm, 7,6 mm, ≥ 5 mm, oder ≥ 2 mm ist. Bei kleinerer Breite und/oder Höhe lässt eine umso bessere Saugwirkung erreichen. Weiter bevorzugt ist an dem Saugkanal zwischen den beiden seitlichen Saugmundabschnitten ein Luftdurchgang ausgebildet, durch den ein Anteil von ≥ 40 % und ≤ 65% der Saugluftströmung durch den zentralen Saugmundabschnitt strömt. Die Öffnungsweite des Luftdurchgangs beträgt bevorzugt 25 mm, 30 mm, 32 mm, 37 mm, 40 mm oder 45 mm. Die Breite des zentralen Saugmundabschnitts an der Vorderseite der Saugdüse ist bevorzugt gleich oder annähernd gleich der Breite der Saugdüse. Bei einer derartigen Aufteilung der Saugluftströmung zwischen dem zentralen Saugmundabschnitt und den seitlichen Saugmundabschnitten lässt sich eine besonders gute Aufnahme sowohl von Feinstaub als auch von Grobgut erreichen.The cross section of the lateral suction mouth section (suction air duct) in the region of the suction duct preferably has an outlet opening with a width of 60 60 mm, 50 50 mm, 40 40 mm, 35 35 mm, 33mm, 30 30 mm or 20 20 mm, the height the outlet opening is preferably 50 50 mm, 40 40 mm, 30 30 mm, 22 mm, 20 20 mm or 10 10 mm. On the side of a base area of the housing, the width of an inlet opening of the lateral suction air duct is preferably 50 50 mm, 40 40 mm, 35 35 mm, 25 mm, 20 20 mm or 10 10 mm, the height of the inlet opening preferably ≤ 20 mm,. 10 mm, 7.6 mm, ≥ 5 mm, or ≥ 2 mm. With a smaller width and / or height, the suction effect is even better. Further preferably, an air passage is formed on the suction channel between the two lateral suction mouth sections, through which a proportion of 40 40% and 65 65% of the suction air flow flows through the central suction mouth section. The opening width of the air passage is preferably 25 mm, 30 mm, 32 mm, 37 mm, 40 mm or 45 mm. The width of the central suction mouth section at the front of the suction nozzle is preferably the same or approximately the same as the width of the suction nozzle. With such a division of the Suction air flow between the central suction mouth section and the lateral suction mouth sections enables particularly good absorption of both fine dust and coarse material.

Weiter bevorzugt erstrecken sich die seitlichen Saugmundabschnitte (Saugluftkanäle) nahezu linear von dem Saugkanal weg zu den Seiten der Grundfläche bzw. des Saugraums, wobei es jedoch ebenso möglich ist, dass sich die Saugmundabschnitte (Saugluftkanäle) abknickend und/oder in einer Kurvenform von dem Saugkanal weg hin zu der Seite der Grundfläche erstrecken. Die Borsten bzw. die Dichtungslippen erstrecken sich bevorzugt von dem Gehäuse senkrecht weg Richtung Boden und sind flexibel ausgestaltet, so dass beim Verschieben der Saugdüse in die übliche Verschieberichtung auf dem Boden befindliches Grobgut oder Feinstaub unter den Borsten bzw. den Dichtungslippen hindurch in den zentralen Saugmundabschnitt und/oder die seitlichen Saugmundabschnitte gelangen kann. Die beiden inneren Strömungsdichtungsmittel begrenzen bevorzugt den Durchgang der Saugluftströmung zwischen dem Saugkanal und dem zentralen Saugmundabschnitt.More preferably, the lateral suction mouth sections (suction air channels) extend almost linearly away from the suction channel to the sides of the base area or the suction space, but it is also possible for the suction mouth sections (suction air channels) to bend and / or curve from the suction channel extend away to the side of the base. The bristles or the sealing lips preferably extend vertically away from the housing towards the floor and are designed to be flexible, so that when the suction nozzle is moved in the usual direction of displacement, coarse material or fine dust located on the floor under the bristles or the sealing lips into the central suction mouth section and / or the side suction mouth sections can reach. The two inner flow sealing means preferably limit the passage of the suction air flow between the suction channel and the central suction mouth section.

Nach einer weiteren bevorzugten Ausgestaltung ist vorgesehen, dass das vordere Strömungsdichtungsmittel in den Saugraum hinein verschwenkbar ausgestaltet und derart dimensioniert ist, dass das vordere Strömungsdichtungsmittel vollständig in den Saugraum hinein verschwenkbar ist, ohne dabei ein inneres seitliches Strömungsdichtungsmittel zu berühren. Derart kann sichergestellt werden, dass nach dem Passieren des Grobguts das vordere Strömungsdichtungsmittel ungehindert in die unverschwenkte Ausgangslage zurückkehren kann.According to a further preferred embodiment, it is provided that the front flow sealing means is designed to be pivotable into the suction space and is dimensioned such that the front flow sealing means can be pivoted completely into the suction space without touching an inner lateral flow sealing means. In this way it can be ensured that after passing the coarse material, the front flow sealing means can return to the non-pivoted starting position unhindered.

Nach einer noch anderen bevorzugten Ausgestaltung weist das vordere Strömungsdichtungsmittel eine rechteckartige Form auf, wobei das vordere Strömungsdichtungsmittel sich von dem Gehäuse, bei auf dem Boden aufgesetzter Saugdüse, bis zum Boden erstreckt, an einer dem seitlichen Strömungsdichtungsmittel und/oder dem Gehäuse abgewandten Seite abgerundet ist, das vordere Strömungsdichtungsmittel einen ersten sich von dem Gehäuse zum Boden erstreckenden und einen sich daran anschließenden zweiten Bereich aufweist, wobei der zweite Bereich gegenüber dem ersten Bereich durch eine geringere Festigkeit gekennzeichnet ist und/oder das vordere Strömungsdichtungsmittel, bei auf dem Boden aufgesetzter Saugdüse, sich in Richtung Saugraum hinein erstreckend gegenüber der Normalen des Bodens verwinkelt (im Sinne von abgewinkelt) angeordnet ist. Bevorzugt ist das vordere Strömungsdichtungsmittel in seinem unverschwenkten Zustand mit einem Winkel in Vorhubrichtung derart verwinkelt angestellt, dass außerhalb des zentralen Saugmundabschnitts befindliches Grobgut auch ohne anliegende Saugluftströmung und nur aufgrund einer Bewegung der Saugdüse in Vorhubrichtung in den zentralen Saugmundabschnitt herein transportiert werden kann. Noch weiter bevorzugt ist das vordere Strömungsdichtungsmittel derart ausgestaltet, dass zwischen dem vorderen Strömungsdichtungsmittel und den beiden inneren seitlichen Strömungsdichtungsmitteln jeweils ein Spalt ausgebildet ist. Der Spalt erstreckt sich bevorzugt über wenigstens 50 mm.According to yet another preferred embodiment, the front flow sealing means has a rectangular shape, the front flow sealing means extending from the housing, with the suction nozzle placed on the floor, to the floor, rounded on a side facing away from the side flow sealing means and / or the housing , the front flow sealant first extends from the housing to the floor extending and an adjoining second region, the second region being characterized by a lower strength compared to the first region and / or the front flow sealing means, when the suction nozzle is placed on the floor, angled in the direction of the suction chamber in relation to the normal of the floor (in the sense of angled) is arranged. In its non-pivoted state, the front flow sealing means is preferably angled at an angle in the forward stroke direction such that coarse material located outside the central suction mouth section can be transported into the central suction mouth section even without suction air flow and only due to a movement of the suction nozzle in the forward stroke direction. Even more preferably, the front flow sealing means is designed such that a gap is formed between the front flow sealing means and the two inner lateral flow sealing means. The gap preferably extends over at least 50 mm.

Zur Ausgestaltung des Mittels zur akustischen Abschirmung existieren grundsätzlich verschiedene Möglichkeiten. Ganz besonders bevorzugt ist jedoch, wenn das Mittel zur akustischen Abschirmung eine V-artige oder teilkreisartige, sich zu einer Rückseite der Saugdüse öffnende Form aufweist und/oder das Mittel zur akustischen Abschirmung aus Kunststoff ausgestaltet ist und/oder, sofern ein vorderes Strömungsdichtungsmittel vorgesehen ist, aus einem gegenüber dem vorderen Strömungsdichtungsmittel härteren Material ausgestaltet ist. Nach einer weiteren bevorzugten Ausgestaltung ist das vordere Strömungsdichtungsmittel als eine Mehrzahl von Mitteln zur akustischen Abschirmung der Saugluftströmung ausgestaltet, wobei die Mittel zur akustischen Abschirmung der Saugluftströmung entlang der Vorderseite des Gehäuses angeordnet sind. In einer weiteren bevorzugten Ausgestaltung ist das vordere Strömungsdichtungsmittel zwischen dem Saugkanal und der Vorderseite des Gehäuses beabstandet zu der Vorderseite angeordnet oder an der Vorderseite an einem Rand des Gehäuses angeordnet und/oder erstreckt sich parallel zu der Vorderseite.In principle, there are various options for designing the means for acoustic shielding. However, it is very particularly preferred if the means for acoustic shielding has a V-like or part-circle shape that opens to a rear side of the suction nozzle and / or the means for acoustic shielding is made of plastic and / or if a front flow sealing means is provided , is made of a material that is harder than the front flow sealing means. According to a further preferred embodiment, the front flow sealing means is designed as a plurality of means for acoustically shielding the suction air flow, the means for acoustically shielding the suction air flow being arranged along the front of the housing. In a further preferred embodiment, the front flow sealing means is arranged between the suction channel and the front of the housing at a distance from the front or is arranged on the front at an edge of the housing and / or extends parallel to the front.

Nach einer bevorzugten Weiterbildung weist der Saugmund und/oder der zentrale Saugmundabschnitt eine Form nach Art eines gleichschenkligen Dreiecks auf, wobei bevorzugt der Saugkanal im Bereich der Spitze zwischen den Schenkeln des Dreiecks in den derart gebildeten Saugraum mündet, sich der zentrale Saugmundabschnitt von dem Saugkanal bis zu der Basis des gleichschenkligen Dreiecks erstreckt und sich die seitlichen Saugmundabschnitte von dem Saugkanal entlang der jeweiligen Schenkel des gleichschenkligen Dreiecks bis zu den der Spitze entgegengesetzt angeordneten Ecken des gleichschenkligen Dreiecks erstrecken. Durch die vorgeschlagene Ausgestaltung ist ein durch den zentralen Saugmundabschnitt ausgebildeter Grobgutbereich im Vorhub der Saugdüse im Wesentlichen vor dem durch die seitlichen Saugmundabschnitte ausgebildeten Feinstaubbereich angeordnet, wobei die seitlichen Saugmundabschnitte an den der Spitze entgegengesetzt angeordneten Ecken des gleichschenkligen Dreiecks an den zentralen Saugmundabschnitt angrenzen. Insofern wird die Feinstaubaufnahme in vorteilhafter Weise zumindest in Eckbereichen der Saugdüse und bis hin zu der Vorderseite der Saugdüse ermöglicht.According to a preferred development, the suction mouth and / or the central suction mouth section has a shape in the manner of an isosceles triangle, the suction channel preferably opening into the suction space formed in the region of the tip between the legs of the triangle, the central suction mouth section extending from the suction channel to extends to the base of the isosceles triangle and the lateral suction mouth sections extend from the suction channel along the respective legs of the isosceles triangle to the corners of the isosceles triangle arranged opposite the tip. As a result of the proposed configuration, a coarse material area formed by the central suction mouth section is arranged in the preliminary stroke of the suction nozzle essentially in front of the fine dust area formed by the lateral suction mouth sections, the lateral suction mouth sections adjoining the central suction mouth section at the corners of the isosceles triangle opposite the tip. In this respect, fine dust absorption is advantageously made possible at least in corner areas of the suction nozzle and up to the front of the suction nozzle.

Nach einer weiteren bevorzugten Ausgestaltung erstrecken sich die beiden seitlichen Saugmundabschnitte von dem Saugkanal jeweils zu einer Seite der Saugdüse derart weg, dass für den Winkel α zwischen den Längserstreckungsrichtungen der beiden seitlichen Saugmundabschnitte gilt 45° ≤ α ≤ 160°, vorzugsweise 90° ≤ α ≤ 135°, ganz besonders bevorzugt α in etwa gleich 135°, oder sich die beiden seitlichen Saugmundabschnitte von dem Saugkanal in einen Kurvenverlauf voneinander weg erstrecken. Sofern sich die beiden seitlichen Saugmundabschnitte zwischen dem Saugkanal und den Seiten der Saugdüse linear oder annähernd linear erstrecken, beispielsweise entlang der Schenkel eines nach Art eines gleichschenkligen Dreiecks ausgestalteten Saugmunds, dann weist der zentrale Saugmundabschnitt bevorzugt eine dreieckartige Form nach Art eines gleichschenkligen Dreiecks auf, dessen Basis in Richtung der Vorderseite der Saugdüse orientiert ist.According to a further preferred embodiment, the two lateral suction mouth sections each extend away from the suction channel to one side of the suction nozzle in such a way that 45 ° α α gilt 160 °, preferably 90 ° α α gilt, applies to the angle α between the longitudinal extension directions of the two side suction mouth sections 135 °, very particularly preferably α approximately equal to 135 °, or the two lateral suction mouth sections extend away from the suction channel in a curve. If the two lateral suction mouth sections extend linearly or approximately linearly between the suction channel and the sides of the suction nozzle, for example along the legs of a suction mouth designed in the manner of an isosceles triangle, then the central suction mouth section preferably has a triangular shape in the manner of an isosceles triangle, the Base is oriented towards the front of the suction nozzle.

Nach einer bevorzugten Weiterbildung weist der Saugmund einen weiteren zentralen Saugmundabschnitt und zwei weitere den weiteren zentralen Saugmundabschnitt flankierende seitliche Saugmundabschnitte auf, wobei sich der zentrale Saugmundabschnitt und der weitere zentrale Saugmundabschnitt von dem Saugkanal in entgegengesetzten Richtungen derart weg erstrecken, dass die zwei seitlichen Saugmundabschnitte und die zwei weiteren seitlichen Saugmundabschnitte eine X-förmige Anordnung ausbilden. Eine derart ausgestaltete Saugdüse kann sowohl im Vorhub als auch im Rückhub Grobgut aufnehmen. Bevorzugt ist die Saugdüse im Vorhub und im Rückhub symmetrisch, insbesondere spiegelsymmetrisch ausgestaltet. Weiter bevorzugt stellt der Saugkanal den Mittelpunkt dieser Ausgestaltung dar, von dem sich der zentrale Saugmundabschnitt mit den beiden seitlichen Saugmundabschnitten und insbesondere spiegelsymmetrisch gegenüberliegend der weitere zentrale Saugmundabschnitt mit den weiteren seitlichen Saugmundabschnitten weg erstrecken. Bei dieser Ausgestaltung kann ein Bediener, anstelle eine aus dem Stand der Technik bekannte Saugdüse manuell um 180° zu drehen, die Saugdüse schlichtweg vor und zurück bewegen, um derart sowohl im Vorhub als auch im Rückhub Grobgut aufzunehmen.According to a preferred development, the suction mouth has a further central suction mouth section and two further the further central suction mouth section flanking lateral suction mouth sections, wherein the central suction mouth section and the further central suction mouth section extend in opposite directions away from the suction channel in such a way that the two side suction mouth sections and the two further lateral suction mouth sections form an X-shaped arrangement. A suction nozzle designed in this way can accommodate coarse material both in the forward stroke and in the return stroke. The suction nozzle is preferably configured symmetrically, in particular mirror-symmetrically, in the forward stroke and in the return stroke. The suction channel further preferably represents the center point of this embodiment, from which the central suction mouth section with the two lateral suction mouth sections and in particular mirror-symmetrically opposite the further central suction mouth section with the further lateral suction mouth sections extend. With this embodiment, instead of manually rotating a suction nozzle known from the prior art by 180 °, an operator can simply move the suction nozzle back and forth in order to pick up coarse material in both the forward stroke and the return stroke.

Nachfolgend wird die Erfindung unter Bezugnahme auf die anliegende Zeichnung anhand einer bevorzugten Ausführungsform näher erläutert. Es zeigen:

Fig. 1
eine Saugdüse gemäß einer bevorzugten Ausführungsform der Erfindung in Unteransicht der Saugdüse, und
Fig. 2
die Saugdüse nach Fig. 1 in einer perspektivischen Ansicht.
The invention is explained in more detail below with reference to the attached drawing using a preferred embodiment. Show it:
Fig. 1
a suction nozzle according to a preferred embodiment of the invention in bottom view of the suction nozzle, and
Fig. 2
the suction nozzle Fig. 1 in a perspective view.

Fig. 1 und 2 zeigen die schematische Unteransicht einer Saugdüse, auch Bodendüse genannt, gemäß einer bevorzugten Ausführungsform der Erfindung. Die Saugdüse weist ein Gehäuse 1 aus Kunststoff auf, an welchem bodenseitig eine Bodenplatte 2 ausgebildet ist. Unterhalb der Bodenplatte 2 ist ein Saugraum 3 ausgebildet, in welchem ein Saugkanal 4 mündet und welcher als bodenseitige Öffnung einen Saugmund 5 ausbildet. Wie aus Fig. 1 zu erkennen ist, weisen die Bodenplatte 2 sowie der Saugmund 5 eine Form nach Art eines gleichschenkligen Dreiecks auf, dessen Basis 6a in Vorhubrichtung die Vorderseite der Saugdüse darstellt. Fig. 1 and 2nd show the schematic bottom view of a suction nozzle, also called floor nozzle, according to a preferred embodiment of the invention. The suction nozzle has a housing 1 made of plastic, on which a base plate 2 is formed on the base side. A suction space 3 is formed below the base plate 2, in which a suction channel 4 opens and which forms a suction mouth 5 as an opening on the bottom. How out Fig. 1 can be seen, the bottom plate 2 and the suction mouth 5 has a shape in the manner of an isosceles triangle, the base 6a of which in the forward stroke direction represents the front of the suction nozzle.

Der Saugkanal 4 ist strömungsdicht mit einem an der Oberseite des Gehäuses 1 vorgesehenen Anschlussstutzen, nicht gezeigt, verbunden. An den Anschlussstutzen lässt sich ein Handhabungsrohr und/oder ein flexibler Schlauch strömungsdicht mit einem Grundgehäuse eines Staubsaugers verbinden, in welchem ein elektrisch betriebener Sauggebläsemotor zum Aufbauen einer Saugluftströmung angeordnet ist. In einem in dem Grundgehäuse angeordneten Staubsammelraum ist von der Saugluftströmung von dem zu reinigenden Boden mitgerissener Schmutz und/oder Staub in einem Staubfilterbeutel absonderbar.The suction channel 4 is connected in a flow-tight manner to a connection piece, not shown, provided on the upper side of the housing 1. At the connection piece, a handling tube and / or a flexible hose can be connected in a flow-tight manner to a basic housing of a vacuum cleaner, in which an electrically operated suction fan motor is arranged to build up a suction air flow. In a dust collecting space arranged in the basic housing, dirt and / or dust entrained by the suction air flow from the floor to be cleaned can be separated in a dust filter bag.

Der Saugmund 5 weist einen zentralen Saugmundabschnitt 6 sowie zwei den zentralen Saugmundabschnitt 6 flankierende bzw. einfassende seitliche Saugmundabschnitte 7 auf. Die seitlichen Saugmundabschnitte 7 erstrecken sich von dem Saugkanal 4 linear hin zu jeweils einer Ecke 7a des gleichschenkligen Dreiecks, so dass der Winkel α zwischen den Längserstreckungsrichtungen der beiden seitlichen Saugmundabschnitte 7 135° beträgt. Strömungstechnisch begrenzt sind die seitlichen Saugmundabschnitte 7 durch innere und äußere seitliche Strömungsdichtungsmittel 8. Die äußeren seitlichen Strömungsdichtungsmittel 8 erstrecken sich von einer jeweiligen Ecke 7a des gleichschenkligen Dreiecks entlang des jeweiligen Schenkels und gehen zwischen den beiden Schenkeln, den Saugkanal 4 teilweise begrenzend, teilkreisförmig ineinander über.The suction mouth 5 has a central suction mouth section 6 and two lateral suction mouth sections 7 flanking or enclosing the central suction mouth section 6. The lateral suction mouth sections 7 extend linearly from the suction channel 4 to a corner 7a of the isosceles triangle, so that the angle α between the longitudinal directions of the two lateral suction mouth sections 7 is 135 °. In terms of flow technology, the lateral suction mouth sections 7 are limited by inner and outer lateral flow sealing means 8. The outer lateral flow sealing means 8 extend from a respective corner 7a of the isosceles triangle along the respective leg and merge into a partial circle between the two legs, partially delimiting the suction channel 4 .

Entsprechend ist die komplette Rückseite der Saugdüse durch äußere seitliche Strömungsdichtungsmittel 8 begrenzt, welche vorliegend als Borstenreihe ausgestaltet sind. Die inneren seitlichen Strömungsdichtungsmittel 8 erstrecken sich annähernd parallel zu den äußeren seitlichen Strömungsdichtungsmitteln 8 derart von dem Saugkanal 4 weg in Richtung der Ecken 7a, dass an dem Saugkanal 4 zwischen den beiden inneren seitlichen Strömungsdichtungsmitteln 8 ein Luftdurchgang 9 für die Saugluftströmung ausgebildet ist. Der Luftdurchgang 9 weist vorliegend eine Breite von etwa 32 mm auf, während die beiden seitlichen Saugmundabschnitte 7 im Bereich des Saugkanals 4 jeweils eine Breite von etwa 33 mm aufweisen. Durch die vorgenannte Dimensionierung wird erreicht, dass ein Anteil von etwa 45 % der Saugluftströmung von dem Saugkanal 4 durch den zentralen Saugmundabschnitt 6 strömt, während der verbleibende Anteil von etwa 55 % sich gleichmäßig auf die beiden seitlichen Saugmundabschnitte 7 aufteilt.Correspondingly, the complete rear side of the suction nozzle is delimited by external lateral flow sealing means 8, which are configured here as a row of bristles. The inner lateral flow sealing means 8 extend approximately parallel to the outer lateral flow sealing means 8 away from the suction channel 4 in the direction of the corners 7a in such a way that an air passage 9 for the suction air flow is formed on the suction channel 4 between the two inner lateral flow sealing means 8. The air passage 9 has in the present case a width of approximately 32 mm, while the two lateral suction mouth sections 7 each have a width of approximately 33 mm in the area of the suction channel 4. The aforementioned dimensioning ensures that a portion of approximately 45% of the suction air flow from the suction channel 4 flows through the central suction mouth section 6, while the remaining portion of approximately 55% is evenly divided between the two side suction mouth sections 7.

Ebenso wie der Saugmund 5 sowie die Bodenplatte 2 weist der zentrale Saugmundabschnitt 6 eine Form nach Art eines gleichschenkligen Dreiecks auf, wobei die beiden inneren seitlichen Strömungsdichtungsmittel 8 die Schenkel des zentralen Saugmundabschnitts 6 strömungsdicht begrenzen. Wie bereits erwähnt, ist an der Spitze des zentralen Saugmundabschnitts 6 der Luftdurchgang 9 hin zum Saugkanal 4 angeordnet, während gegenüberliegend an der Basis 6a und zusammenfallend mit der Vorderseite der Saugdüse ein vorderes Strömungsdichtungsmittel 11 zur wenigstens teilweisen Abdichtung des zentralen Saugmundabschnitts 6 vorgesehen ist.Like the suction mouth 5 and the base plate 2, the central suction mouth section 6 has an isosceles triangle shape, the two inner lateral flow sealing means 8 delimiting the legs of the central suction mouth section 6 in a flow-tight manner. As already mentioned, the air passage 9 to the suction channel 4 is arranged at the tip of the central suction mouth section 6, while a front flow sealing means 11 is provided opposite the base 6a and coinciding with the front of the suction nozzle for at least partially sealing the central suction mouth section 6.

Der zentrale Saugmundabschnitt 6 vergrößert sich einerseits trichter- bzw. V-förmig in seiner Breite von dem Saugkanal 4 linear hin zu der Basis 6a bzw. Vorderseite der Saugdüse, wobei andererseits die Höhe des zentralen Saugmundabschnitts 6 von dem Saugkanal 4 linear hin zu der Basis 6a bzw. der Vorderseite der Saugdüse mit einem Winkel von ca. 8° abfällt. Derart wirkt der zentrale Saugmundabschnitt 6 als eine Art Strömungsdiffusor, so dass durch den derart ausgestalteten zentralen Saugmundabschnitt 6 Grobgut besonders gut aufnehmbar ist.The central suction mouth section 6 increases on the one hand in a funnel or V shape in its width from the suction channel 4 linearly towards the base 6a or front of the suction nozzle, on the other hand the height of the central suction mouth section 6 linearly towards the base from the suction channel 4 6a or the front of the suction nozzle drops at an angle of approx. 8 °. In this way, the central suction mouth section 6 acts as a type of flow diffuser, so that the central suction mouth section 6 configured in this way makes it particularly easy to receive coarse material.

Das vordere Strömungsdichtungsmittel 11 ist als flexible Dichtungslippe ausgestaltet, so dass Grobgut die Dichtungslippe passieren kann. Das im zentralen Saugmundabschnitt 6 angelangte Grobgut wird von der Saugluftströmung erfasst und durch den Saugkanal 4 hindurch abgesaugt. Das vordere Strömungsdichtungsmittel 11 reicht von der Bodenplatte 2 bis auf den Boden, wobei jedoch seitlich jeweils zwischen dem vorderen Strömungsdichtungsmittel 11 und den Ecken 7a der Saugdüse ein Spalt von annähernd 50 mm ausgebildet ist. Derart kann das als Dichtungslippe ausgestaltete vordere Strömungsdichtungsmittel 11 beim Überfahren von Grobgut in den Saugraum 3 hinein verschwenken, ohne dabei die inneren seitlichen Strömungsdichtungsmittel 8 zu berühren.The front flow sealing means 11 is designed as a flexible sealing lip so that coarse material can pass through the sealing lip. The coarse material arriving in the central suction mouth section 6 is captured by the suction air flow and sucked through the suction channel 4. The front flow sealing means 11 extends from the base plate 2 to the floor, but a gap of approximately 50 mm is formed laterally between the front flow sealing means 11 and the corners 7a of the suction nozzle. So that can be as Front flow sealing means 11 designed to swivel the sealing lip pivot when driving over coarse material into the suction space 3 without touching the inner lateral flow sealing means 8.

Während durch das vordere Strömungsdichtungsmittel 11 bereits der Austritt von durch die Saugluftströmung bewirkter Lärmemission reduziert ist, ist zur weiteren Reduzierung der Lärmemission ein Mittel zur akustischen Abschirmung 12 vorgesehen, welches, in den Darstellungen der Figuren 1 und 2, als einstückig mit dem Gehäuse 1 ausgeformte, V-förmige Leiste ausgestaltet ist, die von der Bodenplatte 2 hin zum Boden orientiert ist, ohne dabei jedoch den Boden zu berühren. Das derart ausgestaltete Mittel zur akustischen Abschirmung 12 ist in dem zentralen Saugmundabschnitt 6 in Saugluftströmungsrichtung zwischen der die Vorderseite der Saugdüse bildenden Basis 6a und dem Saugkanal 4 angeordnet. In alternativer nicht gezeigter Ausgestaltung kann das Mittel zur akustischen Abschirmung 12 auch an der Vorderseite des zentralen Saugmundabschnitts 6 bzw. an der Vorderseite der Saugdüse zwischen Teilen des vorderen Strömungsdichtungsmittels 11 angeordnet sein. Ebenso kann das vordere Strömungsdichtungsmittel 11 durch eine Mehrzahl von Mitteln zur akustischen Abschirmung 12 ausgestaltet sein, die an der Vorderseite des zentralen Saugmundabschnitts 6 quer zur Vorhubrichtung hintereinander angeordnet sind.While the emission of noise caused by the suction air flow is already reduced by the front flow sealing means 11, a means for acoustic shielding 12 is provided to further reduce the noise emission, which means, in the representations of FIGS Figures 1 and 2nd , is designed as a single piece with the housing 1, V-shaped bar, which is oriented from the base plate 2 to the floor, but without touching the floor. The acoustic shielding means 12 configured in this way is arranged in the central suction mouth section 6 in the direction of suction air flow between the base 6a forming the front of the suction nozzle and the suction channel 4. In an alternative embodiment, not shown, the means for acoustic shielding 12 can also be arranged on the front of the central suction mouth section 6 or on the front of the suction nozzle between parts of the front flow sealing means 11. Likewise, the front flow sealing means 11 can be designed by a plurality of means for acoustic shielding 12, which are arranged one behind the other on the front side of the central suction mouth section 6 transversely to the direction of the forward stroke.

Der Abstand zwischen dem vorderen Strömungsdichtungsmittel 11 und dem Mittel zur akustischen Abschirmung 12 beträgt ca. 15 mm, während der Abstand zwischen dem Mittel zur akustischen Abschirmung 12 und den inneren seitlichen Strömungsdichtungsmitteln 8 jeweils ca. 22 mm beträgt. Alternativ kann das Mittel zur akustischen Abschirmung 12 auch aus zwei sich etwa 5 cm lang erstreckende Borstenstreifen ausgeführt sein, die in einem Winkel von etwa 30° zueinander versetzt derart an der Bodenplatte 2 angeordnet sind, dass eine direkte Schallemission von dem Saugkanal 4 hin zu der Vorderseite der Saugdüse zumindest eingeschränkt ist.The distance between the front flow sealing means 11 and the means for acoustic shielding 12 is approximately 15 mm, while the distance between the means for acoustic shielding 12 and the inner lateral flow sealing means 8 is in each case approximately 22 mm. As an alternative, the means for acoustic shielding 12 can also be made from two bristle strips which extend approximately 5 cm long and are arranged at an angle of approximately 30 ° to one another on the base plate 2 such that direct sound emission from the suction channel 4 to the Front of the suction nozzle is at least limited.

Durch die vorgeschlagene Ausgestaltung des zentralen Saugmundabschnitts mit einer sich von dem Saugkanal hin zu der Vorderseite der Saugdüse vergrößernden Breite und mit einer in einem Winkel von ≥ 6° und ≤ 10° abfallenden Höhe wird eine besonders effiziente Absaugung sowohl von Feinstaub als auch von Grobgut ermöglicht, ohne dass, wie bei den aus dem Stand der Technik bekannten Ausgestaltungen, eine manuelle Umschaltung zwischen Feinstaub und Grobgut notwendig ist. Durch die experimentell bestätigte Dimensionierung der seitlichen Saugmundabschnitte 7 wird zudem eine hohe Strömungsgeschwindigkeit und insofern ein großer Volumenstrom erreicht, was zudem zu einer sehr guten und effizienten Feinstaubaufnahme führt. Da der Saugmund 5 eine vergleichsweise kleine unterdruckbehaftete Fläche aufweist, ist die zuvor beschriebene Ausgestaltung durch eine geringe Schiebekraft gekennzeichnet. Da andererseits der zentrale Saugmundabschnitt 6 demgegenüber offener gestaltet ist, zeichnet sich die Saugdüse zudem durch eine sehr effiziente Grobgutaufnahme aus, wobei aufgrund des Mittels zur akustischen Abschirmung 12 sowie aufgrund des vorderen Strömungsdichtungsmittels 11 eine nur geringe Lärmemission zu verzeichnen ist.The proposed design of the central suction mouth section with a width widening from the suction channel to the front of the suction nozzle and with a height falling at an angle of ≥ 6 ° and ≤ 10 ° enables particularly efficient suction of both fine dust and coarse material , without, as with the configurations known from the prior art, a manual switchover between fine dust and coarse material is necessary. Due to the experimentally confirmed dimensioning of the lateral suction mouth sections 7, a high flow speed and in this respect a large volume flow is also achieved, which also leads to very good and efficient fine dust pick-up. Since the suction mouth 5 has a comparatively small area subject to negative pressure, the embodiment described above is characterized by a low pushing force. On the other hand, since the central suction mouth section 6 is designed to be more open, the suction nozzle is also distinguished by a very efficient coarse material pickup, with only a low noise emission due to the means for acoustic shielding 12 and due to the front flow sealing means 11.

BezugszeichenlisteReference list

Gehäusecasing 11 BodenplatteBase plate 22nd SaugraumSuction chamber 33rd SaugkanalSuction channel 44th SaugmundSuction mouth 55 Zentraler SaugmundabschnittCentral suction mouth section 66 BasisBase 6a6a Seitlicher SaugmundabschnittSide suction mouth section 77 Eckecorner 7a7a StrömungsdichtungsmittelFlow sealant 88th LuftdurchgangAir passage 99 Vorderes StrömungsdichtungsmittelFront flow sealant 1111 Mittel zur akustischen AbschirmungAcoustic shielding means 1212th

Claims (14)

  1. Suction nozzle for a vacuum cleaner for sucking up dirt and/or dust from a floor by means of a suction air flow, having a housing (1), a suction chamber (3) formed inside the housing (1), a suction channel (4) opening into the suction chamber (3) for guiding the suction air flow, and a suction mouth (5) designed as a floor-side opening of the suction chamber (3), wherein the suction mouth (5) has a central suction mouth portion (6) and two lateral suction mouth portions (7) flanking the central suction mouth portion (6), and the central suction mouth portion (6) is configured such that the width of the central suction mouth portion (6) increases from the suction channel (4) towards the front of the suction nozzle and the height of the central suction mouth portion (6) decreases from the suction channel (4) towards the front of the suction nozzle at an angle of ≥ 6° and ≤ 10°, characterized in that a means for acoustic shielding (12) of the suction air flow is arranged in the central suction mouth portion (6) in the suction air flow direction between the front side of the suction nozzle and the suction channel (4).
  2. Suction nozzle according to claim 1, wherein the width of the central suction mouth portion (6) increases linearly, in steps and/or in a curved shape, the height of the central suction mouth portion (6) decreases linearly, in steps and/or in a curved shape and/or the height decreases with an angle of 8°.
  3. Suction nozzle according to claim 1 or 2, having a front flow sealing means (11) which is constructed and arranged to delimit the central suction mouth portion (6) at the front of the suction nozzle at least in sections.
  4. Suction nozzle according to claim 3, wherein the front flow sealing means (11) is divided into two parts and the acoustic shielding means (12) is arranged between the two parts along the front side of the suction nozzle.
  5. Suction nozzle according to any of the preceding claims, wherein the lateral suction mouth portions (7) are each delimited by inner and outer lateral flow sealing means (8) extending from the suction channel (4) to the sides (9a) of the suction nozzle, so that the central suction mouth portion (6) is delimited by the inner lateral flow sealing means (8) of the respective lateral suction mouth portions (7).
  6. Suction nozzle according to claims 3 and 5, wherein the front flow sealing means (11) is designed to be pivotable into the suction chamber (3) and is dimensioned such that the front flow sealing means (11) is completely pivotable into the suction space (3) without touching an inner lateral flow sealing means (8).
  7. Suction nozzle according to claims 3 and 5 or according to claim 6, wherein the front flow sealing means (11) has a rectangular shape, the front flow sealing means (11) extends from the housing (1) to the floor when the suction nozzle is placed on the floor, and is rounded on a side facing away from the lateral flow sealing means (8) and/or the housing (1), the front flow sealing means (11) has a first region extending from the housing (1) to the floor and an adjoining second region, wherein the second region is characterised by a lower strength compared with the first region and/or the front flow sealing means (11), when the suction nozzle is placed on the floor, is arranged so as to extend in the direction of the suction chamber (3) at an angle to the normal of the floor.
  8. Suction nozzle according to claims 3 and 5 or according to claim 6 or 7, wherein the front flow sealing means (11) is designed such that a gap is formed in each case between the front flow sealing means (11) and the two inner lateral flow sealing means (8).
  9. Suction nozzle according to any one of claims 1 to 8, wherein the means for acoustic shielding (12) has a V-shaped or part-circular shape opening to a rear side of the suction nozzle and/or the means for acoustic shielding (12) is designed from plastic and/or, if a front flow sealing means (11) according to claim 3 is provided, is designed from a material harder than the material of front flow sealing means (11).
  10. Suction nozzle according to claim 3 or according to any one of claims 4 to 9 in combination with claim 3, wherein the front flow sealing means (11) is configured as a plurality of means for acoustic shielding (12) of the suction air flow and the means for acoustic shielding (12) of the suction air flow are arranged along the front side of the housing (1).
  11. Suction nozzle according to claim 3 or according to any one of claims 4 to 10 in combination with claim 3, wherein the front flow sealing means (11) is disposed between the suction channel (4) and the front side of the housing (1) spaced from the front side or is disposed on the front side at an edge of the housing (1) and/or extends parallel to the front side.
  12. Suction nozzle according to any of the preceding claims, wherein the suction mouth (5) and/or the central suction mouth portion (6) has a shape in the manner of an isosceles triangle, preferably the suction channel (4) in the region of the apex between the legs of the triangle opens into the suction chamber (3) thus formed, the central suction mouth portion (6) extends from the suction channel (4) to the base (6a) of the isosceles triangle, and the lateral suction mouth portions (7) extend from the suction channel (4) along the respective legs of the isosceles triangle to the corners (7a) of the isosceles triangle opposite the apex.
  13. Suction nozzle according to any of the preceding claims, wherein the two lateral suction mouth portions (7) extend away from the suction channel (4) to one side (9a) of the suction nozzle in each case such that 45° ≤ α ≤ 160°, preferably 90°≤ α ≤ 135°, very particularly preferably 135°, applies to the angle α between the longitudinal extension directions of the two lateral suction mouth portions (6), or the two lateral suction mouth portions (6) extend away from each other from the suction channel (4) in a curved course.
  14. Suction nozzle according to any of the preceding claims, wherein the suction mouth (5) has a further central suction mouth portion and two further lateral suction mouth portions flanking the further central suction mouth portion, and the central suction mouth portion (6) and the further central suction mouth portion extend away from the suction channel (4) in opposite directions in such a way that the two lateral suction mouth portions (7) and the two further lateral suction mouth portions form an X-like arrangement.
EP16168561.5A 2015-05-21 2016-05-06 Hard ground nozzle for fine material and fine dust capture Active EP3095368B1 (en)

Applications Claiming Priority (1)

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DE102015108051.6A DE102015108051B4 (en) 2015-05-21 2015-05-21 Hard floor nozzle for coarse material and fine dust absorption

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EP3095368A1 EP3095368A1 (en) 2016-11-23
EP3095368B1 true EP3095368B1 (en) 2020-08-05

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JP (1) JP6317394B2 (en)
CN (1) CN106166046B (en)
DE (1) DE102015108051B4 (en)
ES (1) ES2813750T3 (en)
TW (1) TWI629040B (en)

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TW201703713A (en) 2017-02-01
CN106166046A (en) 2016-11-30
DE102015108051A1 (en) 2016-11-24
JP2016214875A (en) 2016-12-22
ES2813750T3 (en) 2021-03-24
TWI629040B (en) 2018-07-11
CN106166046B (en) 2020-09-18
EP3095368A1 (en) 2016-11-23
DE102015108051B4 (en) 2019-08-22
JP6317394B2 (en) 2018-04-25

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