EP2937029B1 - Suction nozzle for suction of smooth surfaces, in particular of tiled ground surfaces - Google Patents

Suction nozzle for suction of smooth surfaces, in particular of tiled ground surfaces Download PDF

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Publication number
EP2937029B1
EP2937029B1 EP15161365.0A EP15161365A EP2937029B1 EP 2937029 B1 EP2937029 B1 EP 2937029B1 EP 15161365 A EP15161365 A EP 15161365A EP 2937029 B1 EP2937029 B1 EP 2937029B1
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EP
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Prior art keywords
suction
mouth
nozzle according
suction nozzle
sealing elements
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EP15161365.0A
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German (de)
French (fr)
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EP2937029A1 (en
Inventor
Horst Dipl. Ing. Dilger
Hans-Joachim Steudtner
Martin Zydek
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Wessel Werk GmbH
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Wessel Werk GmbH
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    • 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
    • A47L9/0606—Nozzles with fixed, e.g. adjustably fixed brushes or the like rigidly anchored brushes, combs, lips or pads

Definitions

  • the invention relates to a suction nozzle for sucking smooth floors, in particular tiled floor surfaces.
  • the suction nozzle comprises a nozzle body having on its underside a suction mouth formed as a recess and a suction opening into the suction mouth for discharging a suction air flowing into the suction mouth and sealing elements, which are arranged in the working direction in front of and behind the suction mouth and on the underside of the nozzle body protrude.
  • lateral Saugraumbegrenzonne are arranged at the ends of the suction mouth, which bridge the distance between the front seal member and the rear seal member. The suction mouth, the sealing elements and the lateral Saugraumbegrenzonne limit a suction chamber on the underside of the nozzle body.
  • a suction nozzle with the features described is out EP 1 935 307 A2 and EP 0 397 112 A1 known.
  • the sealing elements arranged in front of and behind the suction mouth in the working direction consist of strips of sloping-pile suede, which are arranged on both sides of a rectangular mouth in the plan view and are aligned parallel to one another.
  • the nozzle body has a width measured transversely to the working direction of about 300 mm and in the embodiment measured in the working direction length of about 50 mm.
  • the nozzle body is supported on rollers, wherein a gap of 0.5 to 1.5 mm remains between the existing of Schrägborstenvelours Saugmundkanten and a flat bottom surface, to allow running over loose dirt particles.
  • the well-known suction nozzle can be used on textile coverings and smooth floors and is specially optimized for the absorption of fibrous contaminants.
  • suction devices are used in practice, which have a suction fan with an electrical power consumption of more than 1000 W.
  • Suction nozzles for cleaning floor surfaces are designed for high-performance suction units. If such a suction nozzle is operated with a suction device, which has a low-power suction fan, this leads to a significant deterioration of the suction properties of the nozzle. The deterioration of the suction properties is particularly pronounced when the suction nozzle is connected to a low-performance suction device and used for cleaning tiled floor surfaces.
  • Tiled floor surfaces are hard floors that are penetrated by joints.
  • the invention has for its object to provide a suction nozzle for sucking smooth floors, which has good suction properties on grouted hard floors when operating with a suction device, which has a suction fan with an electrical power consumption of less than 900 W., And especially dry, finely divided dirt particles absorbs well.
  • the object of the invention and solution of this problem is a suction nozzle according to claim 1.
  • the working width of the suction nozzle according to the invention is smaller than the working width of the known from practice suction nozzles for floor surfaces.
  • the suction chamber is sealed off circumferentially below the nozzle, wherein on the bottom side flow openings between the front seal member and a flat bottom surface or between the rear seal member and the bottom surface are each characterized by a small overall cross-section according to the feature d).
  • the bottom-side throughflow openings on the front sealing element and on the rear sealing element have substantially the same overall cross-section, so that a dust pickup is independent of whether the suction nozzle is moved with a forward movement or a backward movement over a flat bottom surface.
  • the entire cross section of the bottom-side flow-through openings results from the sum of gaps and / or small openings, which are preferably provided in the longitudinal direction of the sealing elements in a uniform distribution as possible.
  • sealing elements made of air-permeable materials for example in the form of bristle strips, are used, the feature a) is realized if the air permeability of the sealing element under the same test conditions of the air permeability of an opening, with a cross section of less than 200 mm 2 , preferably less than 150 mm 2 , corresponds.
  • the suction space below the nozzle is effectively sealed to the outside to maintain the Saugunterdruck, but without obstructing the suction of dirt particles too strong.
  • inventive values of feature d) take into account the fact that, when driving over grooved floor surfaces, air flows occur which are drawn in via the recesses of the joints and entrain dirt particles from the area of the joints and adjacent floor surface areas.
  • inventive design of the suction nozzle is also essential that by the features b) and c) the volume of the suction chamber at the bottom of the suction nozzle and the flow cross-section within the suction mouth is sufficiently small to a sufficient for the suction and the further transport of dirt particles flow rate to achieve.
  • the total cross section of the bottom-side throughflow openings on the underside of the front sealing element or on the underside of the rear sealing element preferably has a value between 20 mm 2 and 120 mm 2 .
  • the lateral Saugraumbegrenzonnegrenzonne therefore have an air inlet opening and / or ends above the level defined by the lower edge of the sealing elements.
  • the lateral boundaries preferably consist of an air-impermeable element and have a lower edge, which is arranged 2 mm to 5 mm above the lower edge of the sealing elements.
  • the lower edge may be formed in particular as a straight edge.
  • the suction mouth expediently has a rectangular base.
  • the depth of the suction mouth preferably decreases from the mouth region to the ends of the suction mouth which are adjacent to the suction space boundaries.
  • the change in the cross-sectional profile of the suction mouth can be selected so that the flow velocity within the suction mouth remains approximately constant from the ends of the suction mouth to the mouth region of the suction channel.
  • the sealing elements arranged in front of and behind the suction mouth are expediently oriented parallel to one another and are preferably arranged on the edge of the suction mouth.
  • the sealing elements may consist of a bristle strip with a dense bristle trim.
  • a dense bristle set is present when the bristle strip in the side view is opaque and contains no gaps through which air can flow freely from the outside into the suction chamber.
  • the sealing elements may consist of strips of textile material or felt.
  • the strip-shaped sealing elements have a width of less than 20 mm and preferably a width of 5 to 15 mm.
  • strip-shaped plastic elements As sealing elements in the working direction in front of and behind the suction mouth are also suitable strip-shaped plastic elements, which are preferably made of an elastomeric plastic and curved arcuately in a movement of the suction nozzle on a bottom surface in cross section.
  • the strip-shaped plastic elements may have on their outer surface ribs which rest on a movement of the suction nozzle on the bottom surface, so that an air gap between the plastic strip and the bottom surface is formed.
  • the air gap geometry must be determined such that the total cross section of the flow-through opening per sealing element is less than 200 mm 2 and preferably less than 150 mm 2 .
  • the suction channel opens into a side surface of the suction mouth in the suction mouth and connects horizontally to the nozzle body.
  • the suction channel may be rotatably connected to an angular tubular element.
  • the suction nozzle according to the invention enables effective suction of tiled floor surfaces and is adapted to suction devices, which have a low-power suction fan.
  • the invention is therefore also the use of the described suction nozzle for sucking tiled floor surfaces with the proviso that at the suction channel, a suction device is connected, which has a suction fan with an electrical power consumption of less than 900 W.
  • the suction nozzle shown in the figures has a nozzle body 1, which has on its underside a suction mouth formed as a recess 2 and a centrally opening into the suction mouth 2 suction channel for discharging a suction air stream flowing into the suction 2.
  • the nozzle body 1 is equipped with sealing elements 4, 4 ', which are arranged in front of and behind the suction mouth 2 in the working direction and protrude on the underside of the nozzle body 1.
  • 2 lateral Saugraumbegrenzonne 5 are arranged at the ends of the suction mouth, which bridge the distance between the front seal member 4 and the rear seal member 4 '.
  • the sealing elements 4, 4 'and the lateral Saugraumbegrenzonne 5 limit a suction chamber 6 at the bottom of the nozzle body.
  • the suction mouth 2 has a width B measured transversely to the working direction between 200 mm and 280 mm, preferably a width B between 200 mm and 260 mm.
  • the measured from the lower edge of the sealing elements 4, 4 'height H of the suction chamber 6 is outside of an orifice region 7 of the suction channel 3 at least in end suction openings L, each extending from one end of the suction mouth 2, over a length of 60 mm, at least 4 mm and a maximum of 20 mm.
  • the distance x between the front sealing element 4 and the rear sealing element 4 ' is at least 15 mm and a maximum of 50 mm, preferably a maximum of 40 mm.
  • the sum of the bottom-side through-flow openings 8 between the front sealing element 4 and the flat bottom surface 9 and the sum of the bottom-side throughflow openings 8 'between the rear sealing element 4' and the flat bottom surface 9 per sealing element each have a total cross section of less than 200 mm 2, and preferably less than 150 mm 2 . It is particularly advantageous if the flow openings 8, 8 are dimensioned 'to the front seal member 4 and at the rear seal member 4' is substantially the same and are each less than 150 mm 2.
  • the numerical parameter is considered to be realizable, if the air permeability of the sealing element under the same test conditions of air permeability of an opening with a cross section of less than 200 mm 2 , preferably less as 150 mm 2 , corresponds.
  • An embodiment is advantageous in that the total cross section of the bottom-side throughflow openings 8 at the underside of the front sealing element 4 is between 20 mm 2 and 120 mm 2 and that also the total cross section of the bottom side flow openings 8 'at the bottom of the rear sealing element 4' has a value between 20 mm 2 and 120 mm 2 .
  • the lateral Saugraumbegrenzonnegrenzonne 5 include an air inlet opening or end above the lower edge of the sealing elements 4, 4 '.
  • the lateral Saugraumbegrenzonne of an air-impermeable element and have a straight lower edge, which is 2 mm to 5 mm above the lower edge of the sealing elements 4, 4 'is arranged.
  • the suction mouth 2 of the suction nozzle shown in the figures has a rectangular base.
  • the height profile is chosen so that sets an approximately constant flow velocity at least within the end-side suction mouth L sections.
  • the sealing elements 4, 4 'arranged in front of and behind the suction mouth 2 are aligned parallel to one another and arranged on the edge of the suction mouth 2.
  • sealing elements bristle strips with a dense bristle trim strips of textile material and felt strips can be used.
  • the sealing elements 4, 4 'consist of felt strips which have a width of less than 20 mm and preferably a width of 5 to 15 mm.
  • the sealing elements 4, 4 ' also consist of strip-shaped plastic elements, which for example consist of an elastomeric plastic and have ribs on their outer surface, which rest on a movement of the suction nozzle on the bottom surface, so that an air gap between the plastic strip and the bottom surface formed.
  • the suction channel 3 opens on a side surface 10 of the suction mouth 2 into the suction mouth 2 and connects horizontally to the nozzle body 1.
  • An angular tubular element 11 is rotatably connected to the suction channel 3.
  • a suction pipe and / or a suction hose can be connected, which connects the suction nozzle with a suction device, not shown.
  • the suction nozzle shown in the figures is suitable for sucking tiled floor surfaces and can be operated in combination with a suction device which has a suction fan with an electrical power consumption of less than 900 W.

Description

Die Erfindung betrifft eine Saugdüse zum Saugen von Glattböden, insbesondere von gefliesten Bodenflächen. Die Saugdüse umfasst einen Düsenkörper, der an seiner Unterseite einen als Vertiefung ausgebildeten Saugmund und einen in den Saugmund mündenden Saugkanal zur Ableitung eines in den Saugmund einströmenden Saugluftstromes aufweist und Dichtungselemente, die in Arbeitsrichtung vor und hinter dem Saugmund angeordnet sind und an der Unterseite des Düsenkörpers vorstehen. Ferner sind an den Enden des Saugmundes seitliche Saugraumbegrenzungen angeordnet, die den Abstand zwischen dem vorderen Dichtungselement und dem hinteren Dichtungselement überbrücken. Der Saugmund, die Dichtungselemente und die seitlichen Saugraumbegrenzungen begrenzen einen Saugraum an der Unterseite des Düsenkörpers.The invention relates to a suction nozzle for sucking smooth floors, in particular tiled floor surfaces. The suction nozzle comprises a nozzle body having on its underside a suction mouth formed as a recess and a suction opening into the suction mouth for discharging a suction air flowing into the suction mouth and sealing elements, which are arranged in the working direction in front of and behind the suction mouth and on the underside of the nozzle body protrude. Furthermore, lateral Saugraumbegrenzungen are arranged at the ends of the suction mouth, which bridge the distance between the front seal member and the rear seal member. The suction mouth, the sealing elements and the lateral Saugraumbegrenzungen limit a suction chamber on the underside of the nozzle body.

Eine Saugdüse mit den beschriebenen Merkmalen ist aus EP 1 935 307 A2 und EP 0 397 112 A1 bekannt. Die in Arbeitsrichtung vor und hinter dem Saugmund angeordneten Dichtungselemente bestehen aus Streifen aus Schrägborstenvelours, die beidseits eines im Grundriss rechteckförmigen Saugmundes angeordnet sind und zueinander parallel ausgerichtet sind. Der Düsenkörper weist eine quer zur Arbeitsrichtung gemessene Breite von etwa 300 mm und im Ausführungsbeispiel eine in Arbeitsrichtung gemessene Länge von etwa 50 mm auf. Der Düsenkörper ist auf Rollen abgestützt, wobei zwischen den aus Schrägborstenvelours bestehenden Saugmundkanten und einer ebenen Bodenfläche ein Spalt von 0,5 bis 1,5 mm verbleibt, um ein Überfahren von losen Schmutzpartikeln zu ermöglichen. Die bekannte Saugdüse ist auf Textilbelägen und Glattböden einsetzbar und speziell für die Aufnahme von faserförmigen Verunreinigungen optimiert.A suction nozzle with the features described is out EP 1 935 307 A2 and EP 0 397 112 A1 known. The sealing elements arranged in front of and behind the suction mouth in the working direction consist of strips of sloping-pile suede, which are arranged on both sides of a rectangular mouth in the plan view and are aligned parallel to one another. The nozzle body has a width measured transversely to the working direction of about 300 mm and in the embodiment measured in the working direction length of about 50 mm. The nozzle body is supported on rollers, wherein a gap of 0.5 to 1.5 mm remains between the existing of Schrägborstenvelours Saugmundkanten and a flat bottom surface, to allow running over loose dirt particles. The well-known suction nozzle can be used on textile coverings and smooth floors and is specially optimized for the absorption of fibrous contaminants.

Zum Saugen von Bodenflächen werden in der Praxis Sauggeräte eingesetzt, die ein Sauggebläse mit einer elektrischen Leistungsaufnahme von mehr als 1000 W aufweisen. Saugdüsen zum Reinigen von Bodenflächen werden für entsprechend leistungsstarke Sauggeräte ausgelegt. Wenn eine solche Saugdüse mit einem Sauggerät betrieben wird, welches ein leistungsschwächeres Sauggebläse aufweist, führt dies zu einer signifikanten Verschlechterung der Saugeigenschaften der Düse. Besonders ausgeprägt ist die Verschlechterung der Saugeigenschaften, wenn die Saugdüse an ein leistungsschwaches Sauggerät angeschlossen und zur Reinigung von gefliesten Bodenflächen eingesetzt wird. Unter gefliesten Bodenflächen werden Hartböden verstanden, die von Fugen durchsetzt sind.For sucking floor surfaces, suction devices are used in practice, which have a suction fan with an electrical power consumption of more than 1000 W. Suction nozzles for cleaning floor surfaces are designed for high-performance suction units. If such a suction nozzle is operated with a suction device, which has a low-power suction fan, this leads to a significant deterioration of the suction properties of the nozzle. The deterioration of the suction properties is particularly pronounced when the suction nozzle is connected to a low-performance suction device and used for cleaning tiled floor surfaces. Tiled floor surfaces are hard floors that are penetrated by joints.

Vor diesem Hintergrund liegt der Erfindung die Aufgabe zugrunde, eine Saugdüse zum Saugen von Glattböden anzugeben, die bei einem Betrieb mit einem Sauggerät, welches ein Sauggebläse mit einer elektrischen Leistungsaufnahme von weniger als 900 W aufweist, auf gefugten Hartböden gute Saugeigenschaften aufweist und insbesondere trockene, feinteiligen Schmutzpartikel gut aufnimmt.Against this background, the invention has for its object to provide a suction nozzle for sucking smooth floors, which has good suction properties on grouted hard floors when operating with a suction device, which has a suction fan with an electrical power consumption of less than 900 W., And especially dry, finely divided dirt particles absorbs well.

Gegenstand der Erfindung und Lösung dieser Aufgabe ist eine Saugdüse nach Anspruch 1.The object of the invention and solution of this problem is a suction nozzle according to claim 1.

Ausgehend von Saugdüse mit den eingangs beschriebenen Merkmalen ist die erfindungsgemäße Ausgestaltung der Saugdüse durch eine Merkmalskombination folgender Merkmale und Parameter gekennzeichnet:

  1. a) der Saugmund weist eine quer zur Arbeitsrichtung gemessene Breite zwischen 200 mm und 280 mm, vorzugsweise eine Breite zwischen 200 mm und 260 mm, auf;
  2. b) die von der Unterkante der Dichtungselemente bis zur Innenfläche der Vertiefung gemessene Höhe des Saugraumes beträgt außerhalb eines Mündungsbereiches des Saugkanals zumindest in endseitigen Saugmundabschnitten, die sich jeweils von dem Ende des Saugmundes ausgehend über eine Länge von 60 mm erstrecken, mindestens 4 mm und maximal 20 mm;
  3. c) der Abstand zwischen dem vorderen Dichtungselement und dem hinteren Dichtungselement beträgt zumindest 15 mm und maximal 50 mm, vorzugsweise maximal 40 mm;
  4. d) bodenseitige Durchströmöffnungen zwischen dem vorderen Dichtungselement und einer ebenen Bodenfläche und bodenseitige Durchströmöffnungen zwischen dem hinteren Dichtungselement und einer ebenen Bodenfläche weisen an jedem Dichtungselement jeweils einen Gesamtquerschnitt von weniger als 200 mm2, vorzugsweise weniger als 150 mm2, auf.
Starting from the suction nozzle with the features described above, the inventive design of the suction nozzle is characterized by a combination of features of the following features and parameters:
  1. a) the suction mouth has a width measured transversely to the working direction between 200 mm and 280 mm, preferably a width between 200 mm and 260 mm;
  2. b) the measured from the lower edge of the sealing elements to the inner surface of the recess height of the suction chamber is outside an opening region of the suction channel at least in end suction openings, each extending from the end of the suction mouth over a length of 60 mm, at least 4 mm and a maximum 20 mm;
  3. c) the distance between the front sealing element and the rear sealing element is at least 15 mm and a maximum of 50 mm, preferably a maximum of 40 mm;
  4. d) bottom-side through-flow openings between the front sealing element and a flat bottom surface and bottom-side throughflow openings between the rear sealing element and a flat bottom surface each have a total cross-section of less than 200 mm 2 , preferably less than 150 mm 2 , on each sealing element.

Gemäß Merkmal a) ist die Arbeitsbreite der erfindungsgemäßen Saugdüse kleiner als die Arbeitsbreite der aus der Praxis bekannten Saugdüsen für Bodenflächen. Ferner ist der Saugraum unterhalb der Düse umfangsseitig abgeschottet, wobei bodenseitig Durchströmöffnungen zwischen dem vorderen Dichtungselement und einer ebenen Bodenfläche bzw. zwischen dem hinteren Dichtungselement und der Bodenfläche sich jeweils durch einen geringen Gesamtquerschnitt entsprechend dem Merkmal d) auszeichnen. Vorzugsweise haben die bodenseitigen Durchströmöffnungen an dem vorderen Dichtungselement und an dem hinteren Dichtungselement im Wesentlichen denselben Gesamtquerschnitt, so dass eine Staubaufnahme unabhängig davon ist, ob die Saugdüse mit einer Vorwärtsbewegung oder einer Rückwärtsbewegung über eine ebene Bodenfläche bewegt wird. Der gesamte Querschnitt der bodenseitigen Durchströmöffnungen resultiert aus der Summe von Spalten und/oder kleinen Öffnungen, die vorzugsweise in Längsrichtung der Dichtungselemente in einer möglichst gleichmäßigen Verteilung vorgesehen sind. Sofern Dichtungselemente aus luftdurchlässigen Materialien, beispielsweise in Form von Borstenstreifen, verwendet werden, ist das Merkmal a) verwirklicht, wenn die Luftdurchlässigkeit des Dichtungselementes unter gleichen Testbedingungen der Luftdurchlässigkeit einer Öffnung, mit einem Querschnitt von weniger als 200 mm2, vorzugsweise weniger als 150 mm2, entspricht. Erfindungsgemäß ist der Saugraum unterhalb der Düse nach außen wirksam abgedichtet, um den Saugunterdruck aufrechtzuerhalten, jedoch ohne das Einsaugen von Schmutzpartikeln zu stark zu behindern. Die erfindungsgemäßen Werte des Merkmals d) berücksichtigen die Tatsache, dass beim Überfahren von gefugten Bodenflächen Luftströme eintreten, die über die Vertiefungen der Fugen angesaugt werden und Schmutzpartikel aus dem Bereich der Fugen und angrenzenden Bodenflächenbereichen mitreißen. Für die erfindungsgemäße Ausgestaltung der Saugdüse ist ferner wesentlich, dass durch die Merkmale b) und c) das Volumen des Saugraumes an der Unterseite der Saugdüse sowie der Strömungsquerschnitt innerhalb des Saugmundes ausreichend klein ist, um eine für das Saugen und den Weitertransport von Schmutzpartikeln ausreichende Strömungsgeschwindigkeit zu erzielen.According to feature a), the working width of the suction nozzle according to the invention is smaller than the working width of the known from practice suction nozzles for floor surfaces. Further, the suction chamber is sealed off circumferentially below the nozzle, wherein on the bottom side flow openings between the front seal member and a flat bottom surface or between the rear seal member and the bottom surface are each characterized by a small overall cross-section according to the feature d). Preferably the bottom-side throughflow openings on the front sealing element and on the rear sealing element have substantially the same overall cross-section, so that a dust pickup is independent of whether the suction nozzle is moved with a forward movement or a backward movement over a flat bottom surface. The entire cross section of the bottom-side flow-through openings results from the sum of gaps and / or small openings, which are preferably provided in the longitudinal direction of the sealing elements in a uniform distribution as possible. If sealing elements made of air-permeable materials, for example in the form of bristle strips, are used, the feature a) is realized if the air permeability of the sealing element under the same test conditions of the air permeability of an opening, with a cross section of less than 200 mm 2 , preferably less than 150 mm 2 , corresponds. According to the invention, the suction space below the nozzle is effectively sealed to the outside to maintain the Saugunterdruck, but without obstructing the suction of dirt particles too strong. The inventive values of feature d) take into account the fact that, when driving over grooved floor surfaces, air flows occur which are drawn in via the recesses of the joints and entrain dirt particles from the area of the joints and adjacent floor surface areas. For the inventive design of the suction nozzle is also essential that by the features b) and c) the volume of the suction chamber at the bottom of the suction nozzle and the flow cross-section within the suction mouth is sufficiently small to a sufficient for the suction and the further transport of dirt particles flow rate to achieve.

Der Gesamtquerschnitt der bodenseitigen Durchströmöffnungen an der Unterseite des vorderen Dichtungselementes bzw. an der Unterseite des hinteren Dichtungselementes hat vorzugsweise einen Wert zwischen 20 mm2 und 120 mm2. Unter Berücksichtigung, dass beim Saugen gefliester Bodenfläche zusätzliche Luft durch Bodenunebenheiten im Bereich von Fugen unterhalb der Dichtungselemente in den Saugraum eintritt, kann ein ausreichender Saugunterdruck im Saugraum aufrechterhalten werden. Die an den Dichtungselementen anliegende Druckdifferenz bewirkt, dass Luft mit hoher Strömungsgeschwindigkeit an der Unterseite der Dichtungselemente durchtritt und Schmutzpartikel von der Bodenfläche löst und in den Saugmund transportiert. Damit die Schmutzpartikel im Saugmund wirksam abtransportiert und dem Saugkanal zugeführt werden können, ist eine ausreichend hohe Luftströmung innerhalb des Saugkanals notwendig. Damit der Saugmund über seine Gesamtlänge wirksam arbeitet, muss auch dafür gesorgt werden, dass ein ausreichender Luftstrom an den Enden in den Saugkanal eintritt. Gemäß einer bevorzugten Ausführung der Erfindung weisen die seitlichen Saugraumbegrenzungen daher eine Lufteintrittsöffnung auf und/oder enden oberhalb des durch die Unterkante der Dichtungselemente definierten Niveaus. Vorzugsweise bestehen die seitlichen Begrenzungen aus einem luftundurchlässigen Element und weisen eine Unterkante auf, die 2 mm bis 5 mm oberhalb der Unterkante der Dichtungselemente angeordnet ist. Die Unterkante kann insbesondere als gerade Kante ausgebildet sein.The total cross section of the bottom-side throughflow openings on the underside of the front sealing element or on the underside of the rear sealing element preferably has a value between 20 mm 2 and 120 mm 2 . Taking into account that when sucking tiled floor surface additional air due to uneven floors in the area of joints below the sealing elements enters the suction chamber, a sufficient suction negative pressure in the suction chamber can be maintained. The pressure difference applied to the sealing elements causes high-velocity air to pass through the underside of the sealing elements and to detach dirt particles from the bottom surface and to transport them into the suction mouth. So that the dirt particles can be effectively removed in the suction mouth and fed to the suction channel, a sufficiently high air flow within the suction channel is necessary. So that the suction mouth works effectively over its entire length, it must also be ensured that a sufficient air flow at the ends enters the suction channel. According to a preferred embodiment of the invention, the lateral Saugraumbegrenzungen therefore have an air inlet opening and / or ends above the level defined by the lower edge of the sealing elements. The lateral boundaries preferably consist of an air-impermeable element and have a lower edge, which is arranged 2 mm to 5 mm above the lower edge of the sealing elements. The lower edge may be formed in particular as a straight edge.

Der Saugmund weist zweckmäßig eine rechteckförmige Grundfläche auf.The suction mouth expediently has a rectangular base.

Die Tiefe des Saugmundes nimmt vorzugsweise vom Mündungsbereich zu den Enden des Saugmundes, die den Saugraumbegrenzungen benachbart sind, ab. Die Änderung des Querschnittsprofils des Saugmundes kann so gewählt werden, dass die Strömungsgeschwindigkeit innerhalb des Saugmundes von den Enden des Saugmundes zum Mündungsbereich des Saugkanals annähernd konstant bleibt.The depth of the suction mouth preferably decreases from the mouth region to the ends of the suction mouth which are adjacent to the suction space boundaries. The change in the cross-sectional profile of the suction mouth can be selected so that the flow velocity within the suction mouth remains approximately constant from the ends of the suction mouth to the mouth region of the suction channel.

Die in Arbeitsrichtung vor und hinter dem Saugmund angeordneten Dichtungselemente sind zweckmäßig parallel zueinander ausgerichtet und vorzugsweise an der Berandung des Saugmundes angeordnet.The sealing elements arranged in front of and behind the suction mouth are expediently oriented parallel to one another and are preferably arranged on the edge of the suction mouth.

Die Dichtungselemente können aus einen Borstenstreifen mit einem dichten Borstenbesatz bestehen. Ein dichter Borstensatz liegt vor, wenn der Borstenstreifen in der Seitenansicht blickdicht ist und keine Lücken enthält, durch die ungehindert Luft von der Außenseite in den Saugraum einströmen kann.The sealing elements may consist of a bristle strip with a dense bristle trim. A dense bristle set is present when the bristle strip in the side view is opaque and contains no gaps through which air can flow freely from the outside into the suction chamber.

Die Dichtungselemente können aus Streifen aus textilem Material oder Filz bestehen. Zweckmäßig weisen die streifenförmigen Dichtungselemente eine Breite von weniger als 20 mm und vorzugsweise eine Breite von 5 bis 15 mm auf.The sealing elements may consist of strips of textile material or felt. Suitably, the strip-shaped sealing elements have a width of less than 20 mm and preferably a width of 5 to 15 mm.

Als Dichtungselemente in Arbeitsrichtung vor und hinter dem Saugmund eignen sich auch streifenförmige Kunststoffelemente, die vorzugsweise aus einem elastomeren Kunststoff bestehen und sich bei einer Bewegung der Saugdüse über eine Bodenfläche im Querschnitt bogenförmig krümmen. Die streifenförmigen Kunststoffelemente können an ihrer Außenfläche Rippen aufweisen, die bei einer Bewegung der Saugdüse auf der Bodenfläche aufliegen, so dass sich ein Luftspalt zwischen dem Kunststoffstreifen und der Bodenfläche ausbildet. Unter Berücksichtigung der Arbeitsbreite der Saugdüse muss die Luftspaltgeometrie festgelegt werden, dass der Gesamtquerschnitt der Durchströmöffnung pro Dichtungselement weniger als 200 mm2 und vorzugsweise weniger als 150 mm2 aufweist.As sealing elements in the working direction in front of and behind the suction mouth are also suitable strip-shaped plastic elements, which are preferably made of an elastomeric plastic and curved arcuately in a movement of the suction nozzle on a bottom surface in cross section. The strip-shaped plastic elements may have on their outer surface ribs which rest on a movement of the suction nozzle on the bottom surface, so that an air gap between the plastic strip and the bottom surface is formed. Taking into account the working width of the suction nozzle, the air gap geometry must be determined such that the total cross section of the flow-through opening per sealing element is less than 200 mm 2 and preferably less than 150 mm 2 .

Im Hinblick auf die Handhabung der Saugdüse ist es vorteilhaft, wenn der Saugkanal an einer Seitenfläche des Saugmundes in den Saugmund mündet und horizontal an den Düsenkörper anschließt. Der Saugkanal kann mit einem winkelförmigen Rohrelement drehbeweglich verbunden sein.With regard to the handling of the suction nozzle, it is advantageous if the suction channel opens into a side surface of the suction mouth in the suction mouth and connects horizontally to the nozzle body. The suction channel may be rotatably connected to an angular tubular element.

Die erfindungsgemäße Saugdüse ermöglicht ein wirkungsvolles Saugen von gefliesten Bodenflächen und ist auf Sauggeräte abgestimmt, die ein leistungsschwaches Sauggebläse aufweisen. Gegenstand der Erfindung ist daher auch die Verwendung der beschriebenen Saugdüse zum Saugen von gefliesten Bodenflächen mit der Maßgabe, dass an dem Saugkanal ein Sauggerät angeschlossen wird, welches ein Sauggebläse mit einer elektrischen Leistungsaufnahme von weniger als 900 W aufweist.The suction nozzle according to the invention enables effective suction of tiled floor surfaces and is adapted to suction devices, which have a low-power suction fan. The invention is therefore also the use of the described suction nozzle for sucking tiled floor surfaces with the proviso that at the suction channel, a suction device is connected, which has a suction fan with an electrical power consumption of less than 900 W.

Im Folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung erläutert. Es zeigen schematisch

Fig. 1
einen Schnitt durch eine erfindungsgemäße Saugdüse quer zur Arbeitsrichtung,
Fig. 2
eine Unteransicht der in Fig. 1 dargestellten Saugdüse.
In the following the invention will be explained with reference to a drawing showing only one embodiment. It show schematically
Fig. 1
a section through a suction nozzle according to the invention transversely to the working direction,
Fig. 2
a bottom view of in Fig. 1 illustrated suction nozzle.

Die in den Figuren dargestellte Saugdüse weist einen Düsenkörper 1 auf, der an seiner Unterseite einen als Vertiefung ausgebildeten Saugmund 2 und einen mittig in den Saugmund 2 mündenden Saugkanal zu Ableitung eines in den Saugmund 2 einströmenden Saugluftstromes aufweist. Der Düsenkörper 1 ist mit Dichtungselementen 4, 4' bestückt, die in Arbeitsrichtung vor und hinter dem Saugmund 2 angeordnet sind und an der Unterseite des Düsenkörpers 1 vorstehen. Ferner sind an den Enden des Saugmundes 2 seitliche Saugraumbegrenzungen 5 angeordnet, die den Abstand zwischen dem vorderen Dichtungselement 4 und dem hinteren Dichtungselement 4' überbrücken. Der Saugmund 2, die Dichtungselemente 4, 4' und die seitlichen Saugraumbegrenzungen 5 begrenzen einen Saugraum 6 an der Unterseite des Düsenkörpers 1.The suction nozzle shown in the figures has a nozzle body 1, which has on its underside a suction mouth formed as a recess 2 and a centrally opening into the suction mouth 2 suction channel for discharging a suction air stream flowing into the suction 2. The nozzle body 1 is equipped with sealing elements 4, 4 ', which are arranged in front of and behind the suction mouth 2 in the working direction and protrude on the underside of the nozzle body 1. Furthermore, 2 lateral Saugraumbegrenzungen 5 are arranged at the ends of the suction mouth, which bridge the distance between the front seal member 4 and the rear seal member 4 '. Of the Suction port 2, the sealing elements 4, 4 'and the lateral Saugraumbegrenzungen 5 limit a suction chamber 6 at the bottom of the nozzle body. 1

Der Saugmund 2 weist eine quer zur Arbeitsrichtung gemessene Breite B zwischen 200 mm und 280 mm, vorzugsweise eine Breite B zwischen 200 mm und 260 mm auf. Die von der Unterkante der Dichtungselemente 4, 4' gemessene Höhe H des Saugraumes 6 beträgt außerhalb eines Mündungsbereiches 7 des Saugkanals 3 zumindest in endseitigen Saugmundabschnitten L, die sich jeweils von einem Ende des Saugmundes 2 ausgehend über eine Länge von 60 mm erstrecken, mindestens 4 mm und maximal 20 mm. Der Abstand x zwischen dem vorderen Dichtungselement 4 und dem hinteren Dichtungselement 4' beträgt zumindest 15 mm und maximal 50 mm, vorzugsweise maximal 40 mm.The suction mouth 2 has a width B measured transversely to the working direction between 200 mm and 280 mm, preferably a width B between 200 mm and 260 mm. The measured from the lower edge of the sealing elements 4, 4 'height H of the suction chamber 6 is outside of an orifice region 7 of the suction channel 3 at least in end suction openings L, each extending from one end of the suction mouth 2, over a length of 60 mm, at least 4 mm and a maximum of 20 mm. The distance x between the front sealing element 4 and the rear sealing element 4 'is at least 15 mm and a maximum of 50 mm, preferably a maximum of 40 mm.

Bei einer Arbeitsbewegung der Saugdüse über eine ebene Bodenfläche sind bodenseitige Durchströmöffnungen 8 zwischen dem vorderen Dichtungselement 4 und der Bodenfläche 9 und ebenso bodenseitige Durchströmöffnungen 8' zwischen dem hinteren Dichtungselement 4' und der Bodenfläche 9 notwendig, damit Schmutzpartikel überfahren werden können und in den Saugmund 2 gelangen. In dem in der Figur dargestellten Ausführungsbeispiel liegt der untere Rand der Dichtungselemente 4, 4' auf der zu saugenden Bodenfläche auf. Die bodenseitigen Durchströmöffnungen 8, 8' ergeben sich aus der Struktur des unteren Randes der Dichtungselemente 4, 4'. Ferner können in den unteren Rand der Dichtungselemente 4, 4' spaltförmige Vertiefungen eingearbeitet sein. Wesentlich ist, dass die Summe der bodenseitigen Durchströmöffnungen 8 zwischen dem vorderen Dichtungselement 4 und der ebenen Bodenfläche 9 und die Summe der bodenseitigen Durchströmöffnungen 8' zwischen dem hinteren Dichtungselement 4' und der ebenen Bodenfläche 9 pro Dichtungselement jeweils einen Gesamtquerschnitt von weniger als 200 mm2 und vorzugsweise weniger als 150 mm2 aufweisen. Vorteilhaft ist es insbesondere, wenn die Durchströmöffnungen 8, 8' an dem vorderen Dichtungselement 4 und an dem hinteren Dichtungselement 4' im Wesentlichen gleich bemessen sind und jeweils weniger als 150 mm2 betragen. Sofern die Dichtungselemente 4, 4' aus einem luftdurchlässigen Material bestehen und beispielsweise als Borstenstreifen ausgebildet sind, ist der Zahlenparameter als verwirklich anzusehen, wenn die Luftdurchlässigkeit des Dichtungselementes unter gleichen Testbedingungen der Luftdurchlässigkeit einer Öffnung mit einem Querschnitt von weniger als 200 mm2, vorzugsweise weniger als 150 mm2, entspricht. Vorteilhaft ist eine Ausgestaltung dergestalt, dass der Gesamtquerschnitt der bodenseitigen Durchströmöffnungen 8 an der Unterseite des vorderen Dichtungselementes 4 zwischen 20 mm2 und 120 mm2 beträgt und dass auch der Gesamtquerschnitt der bodenseitigen Durchströmöffnungen 8' an der Unterseite des hinteren Dichtungselementes 4' einen Wert zwischen 20 mm2 und 120 mm2 aufweist.In a working movement of the suction nozzle on a flat bottom surface bottom through flow openings 8 between the front seal member 4 and the bottom surface 9 and also bottom-side flow openings 8 'between the rear seal member 4' and the bottom surface 9 necessary so that dirt particles can be run over and into the suction 2 reach. In the embodiment shown in the figure, the lower edge of the sealing elements 4, 4 'on the bottom surface to be sucked on. The bottom-side throughflow openings 8, 8 'result from the structure of the lower edge of the sealing elements 4, 4'. Further, in the lower edge of the sealing elements 4, 4 'gap-shaped recesses may be incorporated. It is essential that the sum of the bottom-side through-flow openings 8 between the front sealing element 4 and the flat bottom surface 9 and the sum of the bottom-side throughflow openings 8 'between the rear sealing element 4' and the flat bottom surface 9 per sealing element each have a total cross section of less than 200 mm 2, and preferably less than 150 mm 2 . It is particularly advantageous if the flow openings 8, 8 are dimensioned 'to the front seal member 4 and at the rear seal member 4' is substantially the same and are each less than 150 mm 2. If the sealing elements 4, 4 'consist of an air-permeable material and are formed for example as a bristle strip, the numerical parameter is considered to be realizable, if the air permeability of the sealing element under the same test conditions of air permeability of an opening with a cross section of less than 200 mm 2 , preferably less as 150 mm 2 , corresponds. An embodiment is advantageous in that the total cross section of the bottom-side throughflow openings 8 at the underside of the front sealing element 4 is between 20 mm 2 and 120 mm 2 and that also the total cross section of the bottom side flow openings 8 'at the bottom of the rear sealing element 4' has a value between 20 mm 2 and 120 mm 2 .

Die seitlichen Saugraumbegrenzungen 5 enthalten eine Lufteintrittsöffnung oder enden oberhalb der Unterkante der Dichtungselemente 4, 4'. Im Ausführungsbeispiel bestehen die seitlichen Saugraumbegrenzungen aus einem luftundurchlässigen Element und weisen einen gerade Unterkante auf, die 2 mm bis 5 mm oberhalb der Unterkante der Dichtungselemente 4, 4' angeordnet ist.The lateral Saugraumbegrenzungen 5 include an air inlet opening or end above the lower edge of the sealing elements 4, 4 '. In the exemplary embodiment, the lateral Saugraumbegrenzungen of an air-impermeable element and have a straight lower edge, which is 2 mm to 5 mm above the lower edge of the sealing elements 4, 4 'is arranged.

Der Saugmund 2 der in den Figuren dargestellten Saugdüse weist eine rechteckförmige Grundfläche auf. Dabei nimmt die Tiefe des Saugmundes 2 vom Mündungsbereich 7 des Saugkanals 3 bis zu den Enden des Saugmundes 2, die den seitlichen Saugraumbegrenzungen 5 benachbart sind, ab. Das Höhenprofil ist so gewählt, dass sich zumindest innerhalb der endseitigen Saugmundabschnitte L eine annähernd konstante Strömungsgeschwindigkeit einstellt.The suction mouth 2 of the suction nozzle shown in the figures has a rectangular base. In this case, the depth of the suction mouth 2 from the mouth region 7 of the suction channel 3 to the ends of the suction mouth 2, which are adjacent to the lateral Saugraumbegrenzungen 5 decreases from. The height profile is chosen so that sets an approximately constant flow velocity at least within the end-side suction mouth L sections.

Die in Arbeitsrichtung vor und hinter dem Saugmund 2 angeordneten Dichtungselemente 4, 4' sind parallel zueinander ausgerichtet und an der Berandung des Saugmundes 2 angeordnet.The sealing elements 4, 4 'arranged in front of and behind the suction mouth 2 are aligned parallel to one another and arranged on the edge of the suction mouth 2.

Als Dichtungselemente können Borstenstreifen mit einem dichten Borstenbesatz, Streifen aus textilem Material und Filzstreifen eingesetzt werden. Im Ausführungsbeispiel bestehen die Dichtungselemente 4, 4' aus Filzstreifen, die eine Breite von weniger als 20 mm und vorzugsweise eine Breite von 5 bis 15 mm aufweisen.As sealing elements bristle strips with a dense bristle trim, strips of textile material and felt strips can be used. In the exemplary embodiment, the sealing elements 4, 4 'consist of felt strips which have a width of less than 20 mm and preferably a width of 5 to 15 mm.

Alternativ können die Dichtungselemente 4, 4' auch aus streifenförmigen Kunststoffelementen bestehen, die beispielsweise aus einem elastomeren Kunststoff bestehen und an ihrer Außenfläche Rippen aufweisen, die bei einer Bewegung der Saugdüse auf der Bodenfläche aufliegen, so dass sich ein Luftspalt zwischen dem Kunststoffstreifen und der Bodenfläche ausbildet.Alternatively, the sealing elements 4, 4 'also consist of strip-shaped plastic elements, which for example consist of an elastomeric plastic and have ribs on their outer surface, which rest on a movement of the suction nozzle on the bottom surface, so that an air gap between the plastic strip and the bottom surface formed.

Den Figuren entnimmt man, dass der Saugkanal 3 an einer Seitenfläche 10 des Saugmundes 2 in den Saugmund 2 mündet und horizontal an den Düsenkörper 1 anschließt. Ein winkelförmiges Rohrelement 11 ist drehbeweglich mit dem Saugkanal 3 verbunden. An das Rohrelement 11 kann ein Saugrohr und/oder ein Saugschlauch angeschlossen werden, der die Saugdüse mit einem nicht dargestellten Sauggerät verbindet.The figures shows that the suction channel 3 opens on a side surface 10 of the suction mouth 2 into the suction mouth 2 and connects horizontally to the nozzle body 1. An angular tubular element 11 is rotatably connected to the suction channel 3. To the tubular element 11, a suction pipe and / or a suction hose can be connected, which connects the suction nozzle with a suction device, not shown.

Die in den Figuren dargestellte Saugdüse eignet sich zum Saugen von gefliesten Bodenflächen und kann in Kombination mit einem Sauggerät betrieben werden, welches ein Sauggebläse mit einer elektrischen Leistungsaufnahme von weniger als 900 W aufweist.The suction nozzle shown in the figures is suitable for sucking tiled floor surfaces and can be operated in combination with a suction device which has a suction fan with an electrical power consumption of less than 900 W.

Claims (17)

  1. A suction nozzle for suctioning smooth floors, in particular tiled floor surfaces, having
    a nozzle body (1), which has on its bottom a suction mouth (2) in the form of a depression and a suction duct (3), which opens into the suction mouth (2), for conducting away a suction air flow that flows into the suction mouth (2),
    sealing elements (4, 4'), which are arranged in front of and behind the suction mouth (2) in the operating direction and project from the bottom of the nozzle body (1), and
    lateral suction space boundaries (5) at the ends of the suction mouth (2), said boundaries spanning the distance (x) between the front sealing element (4) and the rear sealing element (4'),
    the suction mouth (2), the sealing elements (4, 4') and the lateral suction space boundaries (5) delimiting a suction space (6) on the bottom of the nozzle body (1), characterised in that
    the suction mouth (2) has a width (B) of between 200 mm and 280 mm, measured transversely to the operating direction,
    the height (H) of the suction space (6) outside an opening region (7) of the suction duct (3) at least in end suction mouth sections (L), which each extend over a length of 60 mm starting from one end of the suction mouth (2), is at least 4 mm and no more than 20 mm, measured from the lower edge of the sealing elements (4, 4') to the inner face of the depression,
    the distance between the front sealing element (4) and the rear sealing element (4') is at least 15 mm and no more than 50 mm, and
    floor-side through-flow openings (8, 8') between the front sealing element (4) and a flat floor surface (9) and floor-side through-flow openings (8') between the rear sealing element (4') and a flat floor surface (9) in each sealing element each have a total cross-section of less than 200 mm2, preferably less than 150 mm2.
  2. The suction nozzle according to Claim 1, characterised in that the total cross-section of the floor-side through-flow openings (8, 8') in the bottom of the front sealing element (4) and in the bottom of the rear sealing element (4') is in each case between 20 mm2 and 120 mm2.
  3. The suction nozzle according to Claim 1 or 2, characterised in that the lateral suction space boundaries (5) contain an air inlet opening and/or end above the lower edge of the sealing elements (4, 4').
  4. The suction nozzle according to Claim 3, characterised in that the lateral suction space boundaries (5) consist of an air-impermeable element and have a preferably straight lower edge, which is arranged 2 mm to 5 mm above the lower edge of the sealing elements (4, 4').
  5. The suction nozzle according to any one of Claims 1 to 4, characterised in that the suction mouth (2) has a rectangular base area.
  6. The suction nozzle according to any one of Claims 1 to 5, characterised in that the depth of the suction mouth (2) decreases from the opening region (7) of the suction duct (3) to the ends of the suction mouth that are adjacent to the lateral suction space boundaries (5).
  7. The suction nozzle according to any one of Claims 1 to 6, characterised in that the sealing elements (4, 4') arranged in front of and behind the suction mouth (2) in the operating direction are arranged in parallel.
  8. The suction nozzle according to any one of Claims 1 to 7, characterised in that the sealing elements (4, 4') are arranged on the border of the suction mouth (2).
  9. The suction nozzle according to any one of Claims 1 to 8, characterised in that the sealing elements (4, 4') consist of a strip of bristles with a dense bristle load.
  10. The suction nozzle according to any one of Claims 1 to 8, characterised in that the sealing elements (4, 4') consist of strips of a textile material.
  11. The suction nozzle according to any one of Claims 1 to 8, characterised in that the sealing elements (4, 4') consist of felt strips.
  12. The suction nozzle according to any one of Claims 9 to 11, characterised in that the strip-shaped sealing elements (4, 4') have a width of less than 20 mm, preferably a width of 5 to 15 mm.
  13. The suction nozzle according to any one of Claims 1 to 8, characterised in that the sealing elements (4, 4') are in the form of strip-shaped plastic elements and preferably consist of an elastomeric plastic.
  14. The suction nozzle according to Claim 13, characterised in that the strip-shaped plastic elements have ribs on the outer face thereof, said ribs resting on the floor surface when the suction nozzle is moved, so that an air gap is formed between the plastic element and the floor surface.
  15. The suction nozzle according to any one of Claims 1 to 14, characterised in that the suction duct (3) opens into the suction mouth (2) on a side face (10) of the suction mouth (2).
  16. The suction nozzle according to Claim 15, characterised in that the suction duct (3) connects to the nozzle body (1) horizontally and an angled tube element (11) is connected rotatably to the suction duct (3).
  17. Use of a suction nozzle according to any one of Claims 1 to 16 to suction tiled floor surfaces, with the proviso that a suction appliance is connected to the suction duct (3), said suction appliance having a suction fan with an electrical power consumption of less than 900 W.
EP15161365.0A 2014-04-24 2015-03-27 Suction nozzle for suction of smooth surfaces, in particular of tiled ground surfaces Active EP2937029B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014105809.7A DE102014105809A1 (en) 2014-04-24 2014-04-24 Suction nozzle for vacuuming smooth floors, especially tiled floor surfaces

Publications (2)

Publication Number Publication Date
EP2937029A1 EP2937029A1 (en) 2015-10-28
EP2937029B1 true EP2937029B1 (en) 2017-05-10

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ID=52780905

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EP (1) EP2937029B1 (en)
CN (1) CN105030154B (en)
DE (1) DE102014105809A1 (en)

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DE102017115523A1 (en) 2017-01-10 2018-07-12 Miele & Cie. Kg Floor nozzle for vacuum cleaners and vacuum cleaners
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DE102006060855B4 (en) 2006-12-22 2013-08-01 Wessel-Werk Gmbh Floor nozzle for vacuum cleaner
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CN105030154B (en) 2018-06-19
EP2937029A1 (en) 2015-10-28
CN105030154A (en) 2015-11-11
DE102014105809A1 (en) 2015-10-29

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