EP3669732A1 - Vacuum cleaner nozzle, especially a static vacuum cleaner floor nozzle - Google Patents

Vacuum cleaner nozzle, especially a static vacuum cleaner floor nozzle Download PDF

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Publication number
EP3669732A1
EP3669732A1 EP19195220.9A EP19195220A EP3669732A1 EP 3669732 A1 EP3669732 A1 EP 3669732A1 EP 19195220 A EP19195220 A EP 19195220A EP 3669732 A1 EP3669732 A1 EP 3669732A1
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EP
European Patent Office
Prior art keywords
vacuum cleaner
suction
cleaner nozzle
flap
nozzle according
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Granted
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EP19195220.9A
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German (de)
French (fr)
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EP3669732B1 (en
Inventor
Viktor Hooge
Philipp Rath
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Wessel Werk GmbH
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Wessel Werk GmbH
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Publication of EP3669732A1 publication Critical patent/EP3669732A1/en
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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

Definitions

  • the invention relates to a vacuum cleaner nozzle, in particular a static vacuum cleaner floor nozzle with a housing, a suction mouth arranged on the underside of the housing, a suction connection piece for connection to a suction line and a suction channel which connects the suction mouth to the suction connection piece.
  • the vacuum cleaner nozzle also includes a secondary air duct.
  • Vacuum cleaner nozzles are used to shape and channel the suction air flow generated in a suction device on a surface to be cleaned, in particular a floor surface.
  • the design of the vacuum cleaner nozzle is essential for the cleaning properties of a vacuum cleaner.
  • the amount of dirt particles that can be loosened from the surface to be cleaned and transported away in the suction air flow depends to a large extent on the local flow velocities of a suction air flow entering a vacuum cleaner nozzle and on the pressure differences present.
  • the vacuum cleaner nozzle also serves to distribute the suction air flow over the largest possible cleaning surface so that large surfaces can be processed quickly.
  • One way to reduce the sliding resistance is to reduce the suction power.
  • the electrical power of the blower for generating the suction air flow could be throttled or a false air valve could be provided in the suction air duct, usually on a handle of the suction pipe.
  • this can have the disadvantage that there is not enough suction power available on the vacuum cleaner nozzle and in the part of a suction air duct connected to it - for example a suction pipe - to safely remove the loosened dirt.
  • the suction line usually has a greatly enlarged flow cross section compared to the inlet gap on the vacuum cleaner nozzle. As a result, the flow rate is reduced.
  • the invention is therefore based on an application scenario in which the suction power applied to the vacuum cleaner nozzle is not reduced and nevertheless the handling is greatly improved by reducing the negative pressure in the suction nozzle.
  • the vacuum cleaner nozzle has a secondary air duct. Secondary air or false air is to be understood as an air flow which is fed to the suction connection nozzle at the vacuum cleaner nozzle without taking the air path provided for cleaning, in particular through the suction mouth.
  • Vacuum cleaner floor nozzles are known in which an automatic secondary air valve opens when the vacuum in the interior of the vacuum cleaner falls below a certain level and thus enables a secondary air flow.
  • part of the suction channel is designed as an elastic hose. Slits in the hose wall mean that they can be elastically deformed independently of one another and thus opened by the action of a vacuum.
  • the disadvantage here is that the opening and closing characteristics of the secondary air valve are fixed when the vacuum cleaner nozzle is designed and cannot be influenced subsequently.
  • the user cannot effectively counteract wear of the elastic parts. Due to the free movement of the valve parts in addition to that of air valves is always occurring noise to fear an additional noise development due to vibrations and resonances of the valve parts.
  • the invention is based on the object of specifying a vacuum cleaner nozzle with a pushing force reduction by means of secondary air guidance, which overcomes the disadvantages of the prior art. In particular, it should be easy and precise to use and minimize noise.
  • the invention is based on a generic vacuum cleaner nozzle, in particular a static vacuum cleaner floor nozzle with a housing.
  • Static vacuum cleaner nozzles do not have any additional movably driven cleaning agents such as bristle rollers, but only achieve the cleaning effect by means of the suction air flow.
  • the housing of the vacuum cleaner nozzle can in particular be constructed in several parts and, for example, have a housing chassis and at least one cover arranged on the housing.
  • a suction mouth is arranged on the underside of the housing. This designates an opening through which a suction air stream enters the interior of the housing during use.
  • the suction mouth usually has an elongated shape which is elongated in a transverse direction running transversely to the working direction of the vacuum cleaner nozzle.
  • a suction connection piece is provided for connection to a suction line.
  • the suction connector is usually connected to the housing such that it can move about at least one pivot axis.
  • the vacuum cleaner nozzle comprises a suction channel, which the Connects the suction mouth with the suction connector.
  • the suction channel is fluidly connected directly or indirectly to the suction mouth and the suction connection piece.
  • the vacuum cleaner nozzle has a secondary air duct, by means of which an air stream can be supplied to the suction connection piece which can be connected to the suction line, bypassing the suction mouth.
  • the secondary air duct is formed with an opening formed in the suction channel and with a flap movably arranged within the housing.
  • the flow cross section of the secondary air duct can be adjusted by the distance between the flap and the opening.
  • the opening connects the interior of the suction channel to an area within the housing which is fluidly connected to the surroundings.
  • the volume flow of secondary air can be adjusted via the variable (minimal) flow cross-section of the secondary air duct.
  • the flow resistance increases as a result of the secondary air duct, the smaller the flow cross section between the opening in the suction channel and the flap designed as a separate part is set.
  • the flap can completely cover the opening, so that the secondary air flow is completely prevented.
  • the flap can be moved within the housing in particular in a region in which the minimum flow cross section of the secondary air duct is formed by a region between the edge of the opening and the flap.
  • the suction channel has a collecting space arranged above the suction mouth and a tubular section running in the longitudinal direction of the vacuum cleaner nozzle (working direction).
  • the collecting space and the tubular section are connected to one another by a dome.
  • the opening of the suction channel is arranged on the dome opposite the tubular section.
  • the opening is trapezoidal.
  • the surface of the flat opening can thus be optimally used in the case of a tapering or rounded suction channel - for example in a dome-shaped area.
  • the larger side of the trapezoidal shape is also reinforced, which can be used for targeted control.
  • the flap is particularly preferably movable by an operating element arranged on the outside of the vacuum cleaner nozzle.
  • the flap By actuating the control element, the flap can move between at least two positions are moved, which result in a different minimum cross section of the secondary air duct.
  • the flow cross section can be adjusted continuously in a certain range. Thanks to the control element, which is accessible from the outside, the flow cross-section can be easily adjusted during operation and readjusted as required even when the floor covering is changed.
  • the control element is particularly preferably designed as a rotary knob or rotary knob.
  • a rotating control element can be used in an angular range of more than one complete revolution. As a result, both a large setting range and high accuracy can be achieved.
  • the flap is designed to be movable by a spindle drive.
  • a spindle drive can be connected directly to a rotatable control element.
  • a spindle drive can be implemented in a very small space. Here it provides a stepless and powerful adjustment option.
  • a spindle drive with a suitable design is designed to be self-locking, so that the negative pressure inside the vacuum cleaner nozzle and dynamic loads on the secondary air flow do not lead to an adjustment of the flap.
  • the flap is guided in a longitudinally displaceable manner on guide devices of the vacuum cleaner nozzle, in particular of the suction channel.
  • the mobility of the flap is reduced solely to linear displacement in one direction as a result of the positive guidance formed by the guide device.
  • displacement of the flap over the entire circumference results in a uniform change in the air gap.
  • the direction of displacement stands in particular perpendicular to the plane in which the edge of the opening lies or in which the surface of the flap runs. The forced guidance prevents rattling due to undesired movement of the flap in the air flow.
  • the guide devices are particularly preferably integrally formed as projections on the suction channel. Correct alignment of the flap in relation to the opening formed on the suction channel is thus automatically ensured. At least one of the projections can optionally have at least one latching element with which the flap is held within the guide.
  • the flap can be made pivotable.
  • An elastic plastic molded body is particularly preferably arranged between the flap and the opening.
  • the elastic molded plastic body prevents noise when the flap comes into contact with the edges of the opening and, depending on the position of the flap, can also serve as a seal.
  • the plastic molding is expediently connected to the flap.
  • it is glued to the side of the flap facing the suction channel over a large area, particularly over the entire area. This ensures secure positioning of the molded plastic body.
  • the molded plastic body is formed from open-cell foam.
  • the secondary air flow is then partially or completely passed through the pores of the plastic foam. This can lead to a finer one Setting the free flow cross section can be used.
  • the secondary air flow is distributed and calmed down in the pore material, so that less flow noise occurs than at a gap delimited by hard edges.
  • the opening is preferably divided into several partial openings by webs.
  • the webs or rungs can be used to support, to calm the flow and / or, if necessary, to support the molded body. Furthermore, they serve to protect the flap from dirt particles drawn into the air flow through the suction mouth.
  • a vacuum cleaner nozzle according to an embodiment.
  • This comprises a housing, which is composed of a housing chassis 2 and a cover 3.
  • a coupling piece 4 which is mounted so as to be tiltable about a pivot axis running in a transverse direction y, and at the rear end thereof about a second tilting axis a suction connection piece 5 is pivotally mounted.
  • Two support rollers 6 are also arranged on the coupling piece 4.
  • the suction connection piece 5 is connected to the housing 1 by means of a corrugated hose 7.
  • the air flow inside the housing is shown in the sectional views 2A to 2C. It can be seen there that a suction mouth 8 is arranged on the underside of the housing 1 and is connected to the suction connection piece 5 in terms of flow technology via the corrugated hose 7. Furthermore, a secondary air duct is formed within the housing 1 under the cover 3. For this purpose, an opening 10 is formed within a suction channel 9, which connects the suction mouth 8 with the suction connection piece 5. Furthermore, a flap movably arranged within the housing 1 is provided. The flow cross section of the secondary air duct can be adjusted by the distance s between the flap 11 and the opening 10.
  • Figure 2B a semi-closed position.
  • the distance s between the flap 11 and the opening 10 is reduced, so that only a reduced secondary air flow 12 can enter the suction channel.
  • Figure 2C shows a completely closed position, in which the gap is closed so far that no or no significant secondary air components get into the suction channel 9.
  • the suction channel 9 has a collecting space 13 arranged above the suction mouth 8 and a tubular section 14 running in the longitudinal direction / working direction (x) of the vacuum cleaner nozzle.
  • the tubular section 14 simultaneously forms the connection area for the corrugated hose 7.
  • the collecting space 13 and the tubular section 14 are connected to one another by a dome 15.
  • the opening 10 is arranged on the dome 15 opposite the tubular section 14. As indicated by the flow arrows, this results in a particularly low-turbulence confluence of the secondary air flow 12 with the cleaning air flow 16 entering through the suction mouth 8.
  • the suction channel 9 is formed in several parts in the embodiment.
  • the component forming the dome 15 and the tubular section 14 is separate in FIG Fig. 3 shown.
  • the figure shows a rear view looking forward in the working direction x. It can be clearly seen that the opening 10 as a whole has a trapezoidal shape which is mirror-symmetrical with respect to the longitudinal center plane of the vacuum cleaner floor nozzle and is designed with a longer lower edge and a shortened upper edge.
  • the opening 10 is also divided into several areas by a plurality of webs 17.
  • the flap 11 is movable by an operating element arranged on the outside of the housing 1.
  • the control element is designed as a rotary knob 18. If you especially in the Figures 2A to 2C can recognize, the mobility is provided by a spindle drive.
  • the rotary knob 18 is formed with an extension 19 on which an external thread is arranged. The external thread engages in an associated internal thread 20 of the flap 11. The distance s between the flap 11 and the opening 10 can be adjusted by turning the rotary knob 18.
  • the flap 11 is linearly positively guided on the suction channel 9 by projections 21 in the direction of displacement 22. Locking elements 23 at the ends of the projections 21 prevent the flap 11 from falling out of the positive guide.
  • an elastic plastic molded body 24 is arranged between the flap 11 and the opening 10. This is designed as an open-pore foam body through which air can flow.
  • the elastic molded body 24 is glued over the entire surface to the inside of the flap 11 facing the suction channel 9. Furthermore, the open-pore foam body 24 is supported in the webs 17 within the opening 10.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles For Electric Vacuum Cleaners (AREA)

Abstract

Die Erfindung betrifft eine Staubsaugerdüse, insbesondere eine Staubsaugerbodendüse mit einem Gehäuse 1, einem unterseitig an dem Gehäuse (1) angeordneten Saugmund (8), einem Sauganschlussstutzen (5) zum Anschluss einer Saugleitung sowie einem Saugkanal (9), welcher den Saugmund (8) mit dem Sauganschlussstutzen (5) verbindet. Ferner ist eine Nebenluftführung vorgesehen. Erfindungsgemäß weist die Nebenluftführung eine in dem Saugkanal (9) ausgebildete Öffnung (10) und eine innerhalb des Gehäuses (1) beweglich angeordnete Klappe (11) auf. Der Strömungsquerschnitt der Nebenluftführung ist durch den Abstand (s) zwischen der Klappe (11) und der Öffnung (10) einstellbar.The invention relates to a vacuum cleaner nozzle, in particular a vacuum cleaner floor nozzle with a housing 1, a suction mouth (8) arranged on the underside of the housing (1), a suction connection piece (5) for connecting a suction line and a suction channel (9) which connects the suction mouth (8). connects to the suction connector (5). A secondary air duct is also provided. According to the invention, the secondary air duct has an opening (10) formed in the suction channel (9) and a flap (11) movably arranged within the housing (1). The flow cross section of the secondary air duct can be adjusted by the distance (s) between the flap (11) and the opening (10).

Description

Die Erfindung betrifft eine Staubsaugerdüse, insbesondere eine statische Staubsaugerbodendüse mit einem Gehäuse, einem unterseitig an dem Gehäuse angeordneten Saugmund, einem Sauganschlussstutzen zum Anschluss an eine Saugleitung und einem Saugkanal, welcher den Saugmund mit dem Sauganschlussstutzen verbindet. Ferner umfasst die Staubsaugerdüse eine Nebenluftführung.The invention relates to a vacuum cleaner nozzle, in particular a static vacuum cleaner floor nozzle with a housing, a suction mouth arranged on the underside of the housing, a suction connection piece for connection to a suction line and a suction channel which connects the suction mouth to the suction connection piece. The vacuum cleaner nozzle also includes a secondary air duct.

Staubsaugerdüsen dienen dazu, den in einem Sauggerät erzeugten Saugluftstrom an einer zu reinigenden Oberfläche, insbesondere Bodenfläche, zu formen und zu kanalisieren. Die Ausgestaltung der Staubsaugerdüse ist dabei für die Reinigungseigenschaften eines Staubsaugers wesentlich. So hängt es maßgeblich von den lokalen Strömungsgeschwindigkeiten eines in eine Staubsaugerdüse eintretenden Saugluftstromes sowie von den anliegenden Druckdifferenzen ab, welche Menge von Schmutzpartikeln von der zu reinigenden Oberfläche gelöst und im Saugluftstrom abtransportiert werden können. Gleichzeitig dient die Staubsaugerdüse auch dazu, den Saugluftstrom auf eine größtmögliche Reinigungsfläche zu verteilen, um so große Oberflächen zügig bearbeiten zu können.Vacuum cleaner nozzles are used to shape and channel the suction air flow generated in a suction device on a surface to be cleaned, in particular a floor surface. The design of the vacuum cleaner nozzle is essential for the cleaning properties of a vacuum cleaner. The amount of dirt particles that can be loosened from the surface to be cleaned and transported away in the suction air flow depends to a large extent on the local flow velocities of a suction air flow entering a vacuum cleaner nozzle and on the pressure differences present. At the same time, the vacuum cleaner nozzle also serves to distribute the suction air flow over the largest possible cleaning surface so that large surfaces can be processed quickly.

Zusätzliche Ansprüche an die Gestaltung von Staubsaugerdüsen wurden in der Vergangenheit auch durch Energiesparvorschriften gestellt. So ist aufgrund der EU-Ökodesign-Richtlinien die elektrische Verbrauchsleistung bei Haushaltsstaubsaugern derzeit auf höchstens 900 W beschränkt. Infolgedessen steht auch lediglich eine beschränkte physikalische Saugleistung (Produkt aus Volumenstrom und Druckabfall) zur Verfügung. Um eine gleichbleibende oder verbesserte Reinigungswirkung zu erzielen, müssen Staubsaugerdüsen immer besser an ihren jeweiligen Reinigungszweck angepasst werden. Dies hat zur Folge, dass insbesondere bei der Reinigung von Fußböden immer geringere Spaltmaße zwischen der Unterseite der Staubsaugerdüsen und der zu reinigenden Bodenfläche vorgesehen werden. Hierdurch wird der Saugluftstrom in dem schmalen Spalt stark beschleunigt, so dass dieser Schmutzpartikel besser lösen und mitreißen kann.In the past, additional demands were placed on the design of vacuum cleaner nozzles due to energy saving regulations. Due to the EU ecodesign guidelines, the electrical consumption of household vacuum cleaners is currently limited to a maximum of 900 W. As a result, only a limited physical suction power (product of volume flow and pressure drop) is available. In order to achieve a constant or improved cleaning effect, vacuum cleaner nozzles must always be better adapted to their respective cleaning purpose. This has to As a result, especially when cleaning floors, ever smaller gaps are provided between the underside of the vacuum cleaner nozzles and the floor surface to be cleaned. As a result, the suction air flow in the narrow gap is greatly accelerated, so that it can loosen and carry away dirt particles better.

Nachteilig kann hierbei jedoch sein, dass sich aufgrund der geringen Spaltmaße ein hoher Unterdruck im Inneren des Saugkanals einstellt. Infolgedessen wird die Staubsaugerdüse - gerade bei luftundurchlässigen Bodenbelägen - stark an den Fußboden angepresst. Hierdurch ist einerseits eine Beschädigung des Fußbodenbelages möglich und andererseits wird die Handhabung dadurch erheblich gestört, dass zur Bewegung der Staubsaugerdüse höhere Schiebekräfte erforderlich sind. Dieser Effekt wird zusätzlich verstärkt, wenn ein luftundurchlässiges Bodenmaterial eine durchgehende Oberfläche aufweist und nicht mit Fugen oder Profilierungen ausgestattet ist.However, it can be disadvantageous here that a high negative pressure is established in the interior of the suction channel due to the small gap dimensions. As a result, the vacuum cleaner nozzle - especially with air-impermeable floor coverings - is strongly pressed against the floor. This on the one hand can damage the floor covering and on the other hand the handling is considerably disturbed by the fact that higher pushing forces are required to move the vacuum cleaner nozzle. This effect is further enhanced if an air-impermeable floor material has a continuous surface and is not equipped with joints or profiles.

Eine Möglichkeit zur Reduzierung des Schiebewiderstands besteht darin, die Saugleistung zu reduzieren. Hierzu könnte beispielsweise die elektrische Leistung des Gebläses zur Erzeugung des Saugluftstromes gedrosselt oder ein Falschluftventil in der Saugluftführung, üblicherweise an einem Handgriff des Saugrohres vorgesehen werden. Gerade vor dem Hintergrund der ohnehin bereits reduzierten physikalischen Saugleistung kann dies jedoch den Nachteil bringen, dass an der Staubsaugerdüse und in dem daran anschließenden Teil einer Saugluftführung - beispielsweise einem Saugrohr - nicht genügend Saugleistung zur Verfügung steht, um den gelösten Schmutz sicher abzutransportieren. Die Saugleitung weist nämlich gegenüber dem Eintrittsspalt an der Staubsaugerdüse üblicherweise einen stark vergrößerten Strömungsquerschnitt auf. Infolgedessen wird die Strömungsgeschwindigkeit reduziert. Dabei kann es daher vorkommen, dass Schmutzpartikel hoher Dichte - wie beispielsweise Sandkörner oder kleine Steine - nicht ausreichend vom Saugluftstrom beschleunigt werden können, um ihre eigene Gewichtskraft zu überwinden. Die Schmutzpartikel verbleiben infolgedessen im Bereich der Staubsaugerdüse -sofern sie überhaupt vom reduzierten Saugluftstrom von der zu reinigenden Oberfläche gelöst werden können.One way to reduce the sliding resistance is to reduce the suction power. For this purpose, for example, the electrical power of the blower for generating the suction air flow could be throttled or a false air valve could be provided in the suction air duct, usually on a handle of the suction pipe. Especially against the background of the already reduced physical suction power, this can have the disadvantage that there is not enough suction power available on the vacuum cleaner nozzle and in the part of a suction air duct connected to it - for example a suction pipe - to safely remove the loosened dirt. The suction line usually has a greatly enlarged flow cross section compared to the inlet gap on the vacuum cleaner nozzle. As a result, the flow rate is reduced. It can therefore happen that dirt particles of high density - like for example grains of sand or small stones - cannot be accelerated sufficiently by the suction air flow to overcome their own weight. As a result, the dirt particles remain in the area of the vacuum cleaner nozzle - insofar as they can be detached from the surface to be cleaned by the reduced suction air flow.

Die Erfindung geht daher von einem Anwendungsszenario aus, bei dem die an der Staubsaugerdüse anliegende Saugleistung nicht reduziert wird und dennoch durch eine Verminderung des Unterdruckes in der Saugdüse die Handhabbarkeit stark verbessert wird. Zu diesem Zweck weist die Staubsaugerdüse eine Nebenluftführung auf. Unter Nebenluft oder Falschluft ist ein Luftstrom zu verstehen, welcher an der Staubsaugerdüse dem Sauganschlussstutzen zugeleitet wird, ohne hierbei den zur Reinigung vorgesehenen Luftweg - insbesondere durch den Saugmund - zu nehmen.The invention is therefore based on an application scenario in which the suction power applied to the vacuum cleaner nozzle is not reduced and nevertheless the handling is greatly improved by reducing the negative pressure in the suction nozzle. For this purpose, the vacuum cleaner nozzle has a secondary air duct. Secondary air or false air is to be understood as an air flow which is fed to the suction connection nozzle at the vacuum cleaner nozzle without taking the air path provided for cleaning, in particular through the suction mouth.

Zu diesem Zweck sind beispielsweise aus DE 199 07 580 A1 oder DE 299 23 995 U1 Staubsaugerbodendüsen bekannt, bei denen ein automatisches Nebenluftventil sich bei Unterschreiten eines bestimmten Unterdruckes im Staubsaugerdüseninneren öffnet und so einen Nebenluftstrom ermöglicht. Hierzu ist ein Teil des Saugkanals als elastischer Schlauch ausgebildet. Schlitze in der Schlauchwandung führen dazu, dass diese unabhängig voneinander elastisch verformt und so durch Unterdruckwirkung geöffnet werden können.For this purpose, for example, are out DE 199 07 580 A1 or DE 299 23 995 U1 Vacuum cleaner floor nozzles are known in which an automatic secondary air valve opens when the vacuum in the interior of the vacuum cleaner falls below a certain level and thus enables a secondary air flow. For this purpose, part of the suction channel is designed as an elastic hose. Slits in the hose wall mean that they can be elastically deformed independently of one another and thus opened by the action of a vacuum.

Nachteilig hierbei ist jedoch, dass die Öffnungs- und Schließcharakteristik des Nebenluftventils bei der Auslegung der Staubsaugerdüse festgelegt und nicht nachträglich beeinflusst werden kann. Auch einem Verschleiß der elastischen Teile kann der Benutzer nicht wirksam entgegensteuern. Aufgrund der freien Beweglichkeit der Ventilteile ist zusätzlich zu den bei Luftventilen stets auftretenden Geräuschen eine zusätzliche Lärmentwicklung durch Schwingungen und Resonanzen der Ventilteile zu befürchten.The disadvantage here, however, is that the opening and closing characteristics of the secondary air valve are fixed when the vacuum cleaner nozzle is designed and cannot be influenced subsequently. The user cannot effectively counteract wear of the elastic parts. Due to the free movement of the valve parts in addition to that of air valves is always occurring noise to fear an additional noise development due to vibrations and resonances of the valve parts.

Vor diesem Hintergrund liegt der Erfindung die Aufgabe zugrunde, eine Staubsaugerdüse mit einer Schiebekraftreduzierung durch eine Nebenluftführung anzugeben, welche die Nachteile des Standes der Technik überwindet. Insbesondere soll diese leicht und präzise einsetzbar sein und die Geräuschentwicklung minimieren.Against this background, the invention is based on the object of specifying a vacuum cleaner nozzle with a pushing force reduction by means of secondary air guidance, which overcomes the disadvantages of the prior art. In particular, it should be easy and precise to use and minimize noise.

Gegenstand der Erfindung und Lösung dieser Aufgabe ist eine Staubsaugerdüse gemäß Patentanspruch 1. Bevorzugte Ausgestaltungen sind in den Unteransprüchen angegeben.The object of the invention and solution to this problem is a vacuum cleaner nozzle according to claim 1. Preferred embodiments are specified in the subclaims.

Die Erfindung geht von einer gattungsgemäßen Staubsaugerdüse, insbesondere einer statischen Staubsaugerbodendüse mit einem Gehäuse aus. Statische Staubsaugerdüsen verfügen über keine zusätzlichen beweglich angetriebenen Reinigungsmittel wie beispielsweise Borstenwalzen, sondern erzielen die Reinigungswirkung ausschließlich mittels des Saugluftstromes. Das Gehäuse der Staubsaugerdüse kann insbesondere mehrteilig ausgebildet sein und beispielsweise ein Gehäusechassis sowie zumindest einen an dem Gehäuse angeordneten Deckel aufweisen. An dem Gehäuse ist unterseitig ein Saugmund angeordnet. Dieser bezeichnet eine Öffnung, durch welche ein Saugluftstrom bei der Benutzung in das Innere des Gehäuses eintritt. Der Saugmund weist üblicherweise eine längliche, in einer quer zu der Arbeitsrichtung der Staubsaugerdüse verlaufenden Querrichtung langgezogene Form auf. Ferner ist ein Sauganschlussstutzen zum Anschluss an eine Saugleitung vorgesehen. Der Sauganschlussstutzen ist üblicherweise um zumindest eine Schwenkachse beweglich mit dem Gehäuse verbunden. Weiterhin umfasst die Staubsaugerdüse einen Saugkanal, welcher den Saugmund mit dem Sauganschlussstutzen verbindet. Hierzu ist der Saugkanal strömungstechnisch direkt oder indirekt mit dem Saugmund und dem Sauganschlussstutzen verbunden. Außerdem weist die Staubsaugerdüse eine Nebenluftführung auf, mittels derer ein Luftstrom unter Umgehung des Saugmundes dem mit der Saugleitung verbindbaren Sauganschlussstutzen zugeführt werden kann.The invention is based on a generic vacuum cleaner nozzle, in particular a static vacuum cleaner floor nozzle with a housing. Static vacuum cleaner nozzles do not have any additional movably driven cleaning agents such as bristle rollers, but only achieve the cleaning effect by means of the suction air flow. The housing of the vacuum cleaner nozzle can in particular be constructed in several parts and, for example, have a housing chassis and at least one cover arranged on the housing. A suction mouth is arranged on the underside of the housing. This designates an opening through which a suction air stream enters the interior of the housing during use. The suction mouth usually has an elongated shape which is elongated in a transverse direction running transversely to the working direction of the vacuum cleaner nozzle. Furthermore, a suction connection piece is provided for connection to a suction line. The suction connector is usually connected to the housing such that it can move about at least one pivot axis. Furthermore, the vacuum cleaner nozzle comprises a suction channel, which the Connects the suction mouth with the suction connector. For this purpose, the suction channel is fluidly connected directly or indirectly to the suction mouth and the suction connection piece. In addition, the vacuum cleaner nozzle has a secondary air duct, by means of which an air stream can be supplied to the suction connection piece which can be connected to the suction line, bypassing the suction mouth.

Erfindungsgemäß ist die Nebenluftführung mit einer in dem Saugkanal ausgebildeten Öffnung und mit einer innerhalb des Gehäuses beweglich angeordneten Klappe ausgebildet. Der Strömungsquerschnitt der Nebenluftführung ist durch den Abstand zwischen der Klappe und der Öffnung einstellbar. Dabei verbindet die Öffnung das Innere des Saugkanals mit einem Bereich innerhalb des Gehäuses, welcher strömungstechnisch mit der Umgebung verbunden ist. Über den veränderlichen (minimalen) Strömungsquerschnitt der Nebenluftführung lässt sich der Volumenstrom an Nebenluft einstellen. Dabei vergrößert sich der Strömungswiderstand durch die Nebenluftführung je kleiner der Strömungsquerschnitt zwischen der Öffnung in dem Saugkanal und der als separates Teil ausgebildeten Klappe eingestellt ist. Insbesondere kann die Klappe die Öffnung vollständig abdecken, so dass der Nebenluftstrom gänzlich unterbunden wird. Die Klappe ist innerhalb des Gehäuses insbesondere in einem Bereich bewegbar, in dem der minimale Strömungsquerschnitt der Nebenluftführung durch einen Bereich zwischen der Berandung der Öffnung und der Klappe gebildet wird.According to the invention, the secondary air duct is formed with an opening formed in the suction channel and with a flap movably arranged within the housing. The flow cross section of the secondary air duct can be adjusted by the distance between the flap and the opening. The opening connects the interior of the suction channel to an area within the housing which is fluidly connected to the surroundings. The volume flow of secondary air can be adjusted via the variable (minimal) flow cross-section of the secondary air duct. The flow resistance increases as a result of the secondary air duct, the smaller the flow cross section between the opening in the suction channel and the flap designed as a separate part is set. In particular, the flap can completely cover the opening, so that the secondary air flow is completely prevented. The flap can be moved within the housing in particular in a region in which the minimum flow cross section of the secondary air duct is formed by a region between the edge of the opening and the flap.

Im Rahmen der Erfindung ist es möglich, den Nebenluftstrom durch den Abstand zwischen der Klappe und der Öffnung situationsentsprechend anzupassen. Hierbei wird durch die Anordnung innerhalb des Gehäuses die Entwicklung von Strömungsgeräuschen bzw. deren Emission reduziert. Weiterhin ist der Verstellmechanismus im Inneren des Gehäuses vor Beschädigungen und Verschmutzungen geschützt.Within the scope of the invention it is possible to adapt the secondary air flow according to the situation by the distance between the flap and the opening. The arrangement within the housing reduces the development of flow noise or its emission. Furthermore, the adjustment mechanism inside the housing is protected from damage and dirt.

In einer besonders bevorzugten Ausgestaltung der Erfindung weist der Saugkanal einen oberhalb des Saugmundes angeordneten Sammelraum sowie ein in Längsrichtung der Staubsaugerdüse (Arbeitsrichtung) verlaufenden rohrförmigen Abschnitt auf. Der Sammelraum und der rohrförmige Abschnitt sind durch einen Dom miteinander verbunden. Dabei ist die Öffnung des Saugkanals an dem Dom gegenüber dem rohrförmigen Abschnitt angeordnet. Durch eine entsprechende Anordnung tritt die Nebenluft in einer Richtung in den Saugkanal ein, welche der späteren Bewegungsrichtung innerhalb des rohrförmigen Abschnittes entspricht. Somit ist keine zusätzliche Umlenkung notwendig, welche zu Verwirblungen mit entsprechenden Störgeräuschen führen könnte. Der Nebenluftstrom nimmt damit einen oberen Bereich des Doms ein, während der reinigende Anteil des Saugluftstromes durch den Saugmund aus Richtung des Sammelraumes von unten hin zutritt. Durch die Zusammenführung mit dem Nebenluftstrom wird dieser abgelenkt, wobei mitgeführte Schmutzpartikel besser abgelenkt werden, ohne an den Deckenbereich des Doms zu stoßen.In a particularly preferred embodiment of the invention, the suction channel has a collecting space arranged above the suction mouth and a tubular section running in the longitudinal direction of the vacuum cleaner nozzle (working direction). The collecting space and the tubular section are connected to one another by a dome. The opening of the suction channel is arranged on the dome opposite the tubular section. By means of an appropriate arrangement, the secondary air enters the suction channel in a direction which corresponds to the later direction of movement within the tubular section. This means that no additional redirection is necessary, which could lead to turbulence with the corresponding noise. The secondary air flow thus occupies an upper area of the dome, while the cleaning portion of the suction air flow enters from the direction of the collecting space through the suction mouth. By merging with the secondary air flow, this is deflected, whereby entrained dirt particles are deflected better without hitting the ceiling area of the cathedral.

In einer bevorzugten Ausgestaltung der Erfindung ist die Öffnung trapezförmig ausgebildet. Somit lässt sich die Fläche der ebenen Öffnung optimal bei einem zulaufenden oder gerundet ausgeführten Saugkanal - beispielsweise in einem domförmigen Bereich - optimal ausnutzen. Auch wird der größeren Seite der Trapezform verstärkt, was zur gezielten Steuerung eingesetzt werden kann.In a preferred embodiment of the invention, the opening is trapezoidal. The surface of the flat opening can thus be optimally used in the case of a tapering or rounded suction channel - for example in a dome-shaped area. The larger side of the trapezoidal shape is also reinforced, which can be used for targeted control.

Besonders bevorzugt ist die Klappe durch ein an der Außenseite der Staubsaugerdüse angeordnetes Bedienelement beweglich. Durch Betätigung des Bedienelementes kann die Klappe zwischen zumindest zwei Positionen bewegt werden, welche einen voneinander verschiedenen minimalen Querschnitt der Nebenluftführung zur Folge haben. Insbesondere kann der Strömungsquerschnitt in einem gewissen Bereich stufenlos eingestellt werden. Durch das von außen zugängliche Bedienelement lässt sich der Strömungsquerschnitt während des Betriebs leicht einstellen und auch bei einem Wechsel des Bodenbelags bedarfsgerecht nachjustieren.The flap is particularly preferably movable by an operating element arranged on the outside of the vacuum cleaner nozzle. By actuating the control element, the flap can move between at least two positions are moved, which result in a different minimum cross section of the secondary air duct. In particular, the flow cross section can be adjusted continuously in a certain range. Thanks to the control element, which is accessible from the outside, the flow cross-section can be easily adjusted during operation and readjusted as required even when the floor covering is changed.

Besonders bevorzugt ist das Bedienelement als Drehknopf oder Drehknebel ausgebildet. Im Gegensatz zu einem Schiebe- oder Kippschalter lässt sich ein drehendes Bedienelement in einem Winkelbereich von mehr als einer vollständigen Umdrehung einsetzen. Infolgedessen kann hierbei sowohl ein großer Einstellbereich als auch eine hohe Genauigkeit erzielt werden.The control element is particularly preferably designed as a rotary knob or rotary knob. In contrast to a slide or toggle switch, a rotating control element can be used in an angular range of more than one complete revolution. As a result, both a large setting range and high accuracy can be achieved.

In einer besonders bevorzugten Ausgestaltung ist die Klappe durch einen Spindeltrieb beweglich ausgebildet. Dieser kann unmittelbar an ein drehbares Bedienelement angeschlossen sein. Ein Spindeltrieb lässt sich auf sehr geringem Bauraum umsetzen. Hierbei stellt er eine stufenlose und kraftvolle Verstellmöglichkeit bereit. Überdies ist ein Spindeltrieb bei entsprechender Auslegung selbsthemmend ausgebildet, so dass der Unterdruck innerhalb der Staubsaugerdüse sowie dynamische Belastungen des Nebenluftstroms nicht zu einer Verstellung der Klappe führen.In a particularly preferred embodiment, the flap is designed to be movable by a spindle drive. This can be connected directly to a rotatable control element. A spindle drive can be implemented in a very small space. Here it provides a stepless and powerful adjustment option. In addition, a spindle drive with a suitable design is designed to be self-locking, so that the negative pressure inside the vacuum cleaner nozzle and dynamic loads on the secondary air flow do not lead to an adjustment of the flap.

In einer besonders bevorzugten Ausgestaltung ist die Klappe an Führungseinrichtungen der Staubsaugerdüse, insbesondere des Saugkanals längs verschieblich geführt. Insbesondere ist die Beweglichkeit der Klappe in Folge der durch die Führungseinrichtung gebildeten Zwangsführung allein auf eine lineare Verschiebbarkeit in einer Richtung reduziert. Hierdurch hat eine Verschiebung der Klappe am gesamten Umfang eine gleichmäßige Änderung des Luftspaltes zur Folge. Die Verschiebungsrichtung steht insbesondere senkrecht zu der Ebene, in welcher die Berandung der Öffnung liegt bzw. in der die Oberfläche der Klappe verläuft. Durch die Zwangsführung wird ein Klappern durch unerwünschte Bewegung der Klappe im Luftstrom verhindert.In a particularly preferred embodiment, the flap is guided in a longitudinally displaceable manner on guide devices of the vacuum cleaner nozzle, in particular of the suction channel. In particular, the mobility of the flap is reduced solely to linear displacement in one direction as a result of the positive guidance formed by the guide device. As a result, displacement of the flap over the entire circumference results in a uniform change in the air gap. The direction of displacement stands in particular perpendicular to the plane in which the edge of the opening lies or in which the surface of the flap runs. The forced guidance prevents rattling due to undesired movement of the flap in the air flow.

Besonders bevorzugt sind die Führungseinrichtungen als Vorsprünge einstückig an den Saugkanal angeformt. Somit ist automatisch eine korrekte Ausrichtung der Klappe im Verhältnis zu der an dem Saugkanal ausgebildeten Öffnung gewährleistet. Zumindest einer der Vorsprünge kann optional zumindest ein Rastelement aufweisen, mit dem die Klappe innerhalb der Führung gehalten wird.The guide devices are particularly preferably integrally formed as projections on the suction channel. Correct alignment of the flap in relation to the opening formed on the suction channel is thus automatically ensured. At least one of the projections can optionally have at least one latching element with which the flap is held within the guide.

In einer alternativen Ausgestaltung kann die Klappe aus verschwenkbar ausgebildet sein.In an alternative embodiment, the flap can be made pivotable.

Besonders bevorzugt ist zwischen der Klappe und der Öffnung ein elastischer Kunststoffformkörper angeordnet. Der elastische Kunststoffformkörper verhindert Geräusche beim Kontakt zwischen der Klappe und der Berandung der Öffnung und kann überdies - je nach Position der Klappe - auch als Dichtung dienen.An elastic plastic molded body is particularly preferably arranged between the flap and the opening. The elastic molded plastic body prevents noise when the flap comes into contact with the edges of the opening and, depending on the position of the flap, can also serve as a seal.

Der Kunststoffformkörper ist zweckmäßigerweise mit der Klappe verbunden. Insbesondere ist der flächig, ganz besonders vollflächig mit der dem Saugkanal zugewandten Seite der Klappe verklebt. Somit wird eine sichere Positionierung des Kunststoffformkörpers gewährleistet.The plastic molding is expediently connected to the flap. In particular, it is glued to the side of the flap facing the suction channel over a large area, particularly over the entire area. This ensures secure positioning of the molded plastic body.

In einer ganz besonders bevorzugten Ausgestaltung der Erfindung ist der Kunststoffformkörper aus offenporigem Schaumstoff gebildet. Je nach Stellung der Klappe wird der Nebenluftstrom dann teilweise oder vollständig durch die Poren des Kunststoffschaums hindurchgeführt. Dies kann zu einer feineren Einstellung des freien Strömungsquerschnitts genutzt werden. Der Nebenluftstrom wird dabei im Porenmaterial verteilt und beruhigt, so dass sich weniger Strömungsgeräusche als an einem durch harte Kanten begrenzten Spalt einstellen.In a very particularly preferred embodiment of the invention, the molded plastic body is formed from open-cell foam. Depending on the position of the flap, the secondary air flow is then partially or completely passed through the pores of the plastic foam. This can lead to a finer one Setting the free flow cross section can be used. The secondary air flow is distributed and calmed down in the pore material, so that less flow noise occurs than at a gap delimited by hard edges.

Weiterhin ist die Öffnung bevorzugt durch Stege in mehrere Teilöffnungen unterteilt. Die Stege oder Sprossen können dabei zur Abstützung, zur Strömungsberuhigung und/oder ggf. zur Stützung des Formkörpers genutzt werden. Weiterhin dienen sie dem Schutz der Klappe vor in dem Luftstrom durch den Saugmund hereingezogenen Schmutzpartikeln.Furthermore, the opening is preferably divided into several partial openings by webs. The webs or rungs can be used to support, to calm the flow and / or, if necessary, to support the molded body. Furthermore, they serve to protect the flap from dirt particles drawn into the air flow through the suction mouth.

Die Erfindung wird nachfolgend anhand einer lediglich ein Ausführungsbeispiel darstellenden Gestaltung erläutert. Es zeigen dabei schematisch:

Fig. 1
eine perspektivische Darstellung einer erfindungsgemäßen Staubsaugerdüse mit einem teilweise aufgebrochenen Gehäuse,
Fig. 2a
einen Längsschnitt durch die Staubsaugerdüse gemäß Fig. 1 in
bis 2c
verschiedenen Funktionsstellungen und
Fig. 3
eine rückwertige Detailansicht eines Einzelteils der erfindungsgemäßen Staubsaugerbodendüse.
The invention is explained below on the basis of a design which represents only one exemplary embodiment. They show schematically:
Fig. 1
2 shows a perspective illustration of a vacuum cleaner nozzle according to the invention with a partially broken open housing,
Fig. 2a
a longitudinal section through the vacuum cleaner nozzle according Fig. 1 in
to 2c
different functional positions and
Fig. 3
a reverse detailed view of a single part of the vacuum cleaner floor nozzle according to the invention.

In der Fig. 1 ist eine erfindungsgemäße Staubsaugerdüse gemäß einem Ausführungsbeispiel dargestellt. Diese umfasst ein Gehäuse ein, welches aus einem Gehäusechassis 2 und einem Deckel 3 zusammengesetzt ist. An das Gehäuse 1 ist im rückwertigen Bereich über ein um eine in einer Querrichtung y verlaufende Schwenkachse kippbeweglich gelagertes Koppelstück 4 angeordnet, an dessen hinteren Ende um eine zweite Kippachse schwenkbeweglich gelagert ein Sauganschlussstutzen 5 befestigt ist. An dem Koppelstück 4 sind ferner zwei Stützrollen 6 angeordnet.In the Fig. 1 is shown a vacuum cleaner nozzle according to an embodiment. This comprises a housing, which is composed of a housing chassis 2 and a cover 3. Arranged on the housing 1 in the rear area is a coupling piece 4 which is mounted so as to be tiltable about a pivot axis running in a transverse direction y, and at the rear end thereof about a second tilting axis a suction connection piece 5 is pivotally mounted. Two support rollers 6 are also arranged on the coupling piece 4.

Der Sauganschlussstutzen 5 ist mittels eines Wellschlauches 7 mit dem Gehäuse 1 verbunden.The suction connection piece 5 is connected to the housing 1 by means of a corrugated hose 7.

Die Luftführung im Inneren des Gehäuses ist in den Schnittdarstellungen 2A bis 2C dargestellt. Dort ist erkennbar, dass unterseitig an dem Gehäuse 1 ein Saugmund 8 angeordnet ist, welcher strömungstechnisch über den Wellschlauch 7 mit dem Sauganschlussstutzen 5 verbunden ist. Ferner ist innerhalb des Gehäuses 1 unter dem Deckel 3 eine Nebenluftführung ausgebildet. Dazu ist innerhalb eines Saugkanals 9, welcher den Saugmund 8 mit dem Sauganschlussstutzen 5 verbindet eine Öffnung 10 ausgebildet. Ferner ist eine innerhalb des Gehäuses 1 beweglich angeordnete Klappe vorgesehen. Der Strömungsquerschnitt der Nebenluftführung ist durch den Abstand s zwischen der Klappe 11 und der Öffnung 10 einstellbar.The air flow inside the housing is shown in the sectional views 2A to 2C. It can be seen there that a suction mouth 8 is arranged on the underside of the housing 1 and is connected to the suction connection piece 5 in terms of flow technology via the corrugated hose 7. Furthermore, a secondary air duct is formed within the housing 1 under the cover 3. For this purpose, an opening 10 is formed within a suction channel 9, which connects the suction mouth 8 with the suction connection piece 5. Furthermore, a flap movably arranged within the housing 1 is provided. The flow cross section of the secondary air duct can be adjusted by the distance s between the flap 11 and the opening 10.

In Fig. 2A ist die maximal geöffnete Position der Klappe 11 dargestellt. Dabei ist der Abstand s maximal groß, so dass sich auch ein maximaler Querschnitt für den Nebenluftstrom 12 ergibt.In Figure 2A the maximum open position of the flap 11 is shown. The distance s is maximally large, so that there is also a maximum cross section for the secondary air flow 12.

Im Unterschied hierzu zeigt die Fig. 2B eine halb geschlossene Stellung. Der Abstand s zwischen der Klappe 11 und der Öffnung 10 ist hierbei verringert, so dass nur ein verminderter Nebenluftstrom 12 in den Saugkanal eintreten kann. Fig. 2C zeigt eine vollständig geschlossene Position, in der der Spalt soweit zugefahren ist, dass keine bzw. keine wesentlichen Nebenluftanteile in den Saugkanal 9 gelangen.In contrast, the Figure 2B a semi-closed position. The distance s between the flap 11 and the opening 10 is reduced, so that only a reduced secondary air flow 12 can enter the suction channel. Figure 2C shows a completely closed position, in which the gap is closed so far that no or no significant secondary air components get into the suction channel 9.

In der gezeigten Ausführungsform weist der Saugkanal 9 einen oberhalb des Saugmundes 8 angeordneten Sammelraum 13 sowie einen in der Längsrichtung/Arbeitsrichtung (x) der Staubsaugerdüse verlaufenden rohrförmigen Abschnitt 14 auf. Der rohrförmige Abschnitt 14 bildet gleichzeitig den Anschlussbereich für den Wellschlauch 7. Der Sammelraum 13 und der rohrförmige Abschnitt 14 sind durch einen Dom 15 miteinander verbunden. Die Öffnung 10 ist an dem Dom 15 gegenüber dem rohrförmigen Abschnitt 14 angeordnet. Wie durch die Strömungspfeile angedeutet, ergibt sich hierdurch ein besonders turbulentsarmer Zusammenfluss des Nebenluftstromes 12 mit dem durch den Saugmund 8 eintretenden Reinigungsluftstrom 16.In the embodiment shown, the suction channel 9 has a collecting space 13 arranged above the suction mouth 8 and a tubular section 14 running in the longitudinal direction / working direction (x) of the vacuum cleaner nozzle. The tubular section 14 simultaneously forms the connection area for the corrugated hose 7. The collecting space 13 and the tubular section 14 are connected to one another by a dome 15. The opening 10 is arranged on the dome 15 opposite the tubular section 14. As indicated by the flow arrows, this results in a particularly low-turbulence confluence of the secondary air flow 12 with the cleaning air flow 16 entering through the suction mouth 8.

Der Saugkanal 9 ist im Ausführungsbeispiel mehrteilig ausgebildet. Das den Dom 15 sowie den rohrförmigen Abschnitt 14 bildende Bauteil ist separat in der Fig. 3 dargestellt. Die Figur zeigt eine Hinteransicht mit Blickrichtung nach vorne in der Arbeitsrichtung x. Es ist deutlich erkennbar, dass die Öffnung 10 insgesamt eine Trapezform aufweist, welche spiegelsymmetrisch bezüglich der Längsmittelebene der Staubsaugerbodendüse ausgebildet und mit einer längeren unteren Kante und einer demgegenüber verkürzten oberen Kante ausgebildet ist. Die Öffnung 10 wird überdies durch mehrere Stege 17 in mehrere Bereiche aufgeteilt.The suction channel 9 is formed in several parts in the embodiment. The component forming the dome 15 and the tubular section 14 is separate in FIG Fig. 3 shown. The figure shows a rear view looking forward in the working direction x. It can be clearly seen that the opening 10 as a whole has a trapezoidal shape which is mirror-symmetrical with respect to the longitudinal center plane of the vacuum cleaner floor nozzle and is designed with a longer lower edge and a shortened upper edge. The opening 10 is also divided into several areas by a plurality of webs 17.

Die Klappe 11 ist durch ein an der Außenseite des Gehäuses 1 angeordnetes Bedienelement beweglich. Das Bedienelement ist hierbei als Drehknopf 18 ausgebildet. Wenn man insbesondere in den Figuren 2A bis 2C erkennen kann, wird die Beweglichkeit durch einen Spindeltrieb bereitgestellt. Hierzu ist der Drehknopf 18 mit einem Fortsatz 19 ausgebildet, an dem ein Außengewinde angeordnet ist. Das Außengewinde greift in ein zugeordnetes Innengewinde 20 der Klappe 11 ein. Durch ein Verdrehen des Drehknopfes 18 kann der Abstand s zwischen der Klappe 11 und der Öffnung 10 eingestellt werden.The flap 11 is movable by an operating element arranged on the outside of the housing 1. The control element is designed as a rotary knob 18. If you especially in the Figures 2A to 2C can recognize, the mobility is provided by a spindle drive. For this purpose, the rotary knob 18 is formed with an extension 19 on which an external thread is arranged. The external thread engages in an associated internal thread 20 of the flap 11. The distance s between the flap 11 and the opening 10 can be adjusted by turning the rotary knob 18.

Die Klappe 11 ist an dem Saugkanal 9 durch Vorsprünge 21 in der Verschiebungsrichtung 22 linear zwangsgeführt. Rastelemente 23 an den Enden der Vorsprünge 21 verhindern ein Herausfallen der Klappe 11 aus der Zwangsführung.The flap 11 is linearly positively guided on the suction channel 9 by projections 21 in the direction of displacement 22. Locking elements 23 at the ends of the projections 21 prevent the flap 11 from falling out of the positive guide.

Im gezeigten Ausführungsbeispiel ist zwischen der Klappe 11 und der Öffnung 10 ein elastischer Kunststoffformkörper 24 angeordnet. Dieser ist als offenporiger Schaumstoffkörper ausgebildet, welcher von Luft durchströmt werden kann. Der elastische Formkörper 24 ist vollflächig mit der dem Saugkanal 9 zugewandten Innenseite der Klappe 11 verklebt. Ferner findet der offenporige Schaumkörper 24 eine Stütze in den Stegen 17 innerhalb der Öffnung 10.In the exemplary embodiment shown, an elastic plastic molded body 24 is arranged between the flap 11 and the opening 10. This is designed as an open-pore foam body through which air can flow. The elastic molded body 24 is glued over the entire surface to the inside of the flap 11 facing the suction channel 9. Furthermore, the open-pore foam body 24 is supported in the webs 17 within the opening 10.

Claims (13)

Staubsaugerdüse, insbesondere statischer Staubsaugerbodendüse, mit einem Gehäuse (1), einem unterseitig an dem Gehäuse (1) angeordneten Saugmund (8), einem Sauganschlussstutzen (5) zum Anschluss an eine Saugleitung, einem Saugkanal (9), welcher den Saugmund (8) mit dem Sauganschlussstutzen (5) verbindet und mit einer Nebenluftführung, dadurch gekennzeichnet, dass die Nebenluftführung eine in dem Saugkanal (9) ausgebildete Öffnung (10) und eine innerhalb des Gehäuses (1) beweglich angeordnete Klappe (11) aufweist und dass der Strömungsquerschnitt der Nebenluftführung durch den Abstand (s) zwischen der Klappe (11) und der Öffnung (10) einstellbar ist.Vacuum cleaner nozzle, in particular a static vacuum cleaner floor nozzle, with a housing (1), a suction mouth (8) arranged on the underside of the housing (1), a suction connection piece (5) for connection to a suction line, a suction channel (9) which connects the suction mouth (8) connects to the suction connection piece (5) and to a secondary air duct, characterized in that the secondary air duct has an opening (10) formed in the suction duct (9) and a flap (11) movably arranged within the housing (1) and that the flow cross section of the Secondary air flow can be adjusted by the distance (s) between the flap (11) and the opening (10). Staubsaugerdüse nach Anspruch 1, dadurch gekennzeichnet, dass der Saugkanal (9) einen oberhalb des Saugmundes (8) angeordneten Sammelraum (13) sowie ein einen in Längsrichtung (x) der Staubsaugerdüse verlaufenden rohrförmigen Abschnitt (14) aufweist, dass der Sammelraum (13) und der rohrförmige Abschnitt (14) durch einen Dom (15) miteinander verbunden sind und dass die Öffnung (10) an dem Dom (15) gegenüber dem rohrförmigen Abschnitt (14) angeordnet ist.Vacuum cleaner nozzle according to claim 1, characterized in that the suction channel (9) has a collecting space (13) arranged above the suction mouth (8) and a tubular section (14) running in the longitudinal direction (x) of the vacuum cleaning nozzle, that the collecting space (13) and the tubular section (14) are connected to one another by a dome (15) and in that the opening (10) on the dome (15) is arranged opposite the tubular section (14). Staubsaugerdüse nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Öffnung (10) trapezförmig ausgebildet ist.Vacuum cleaner nozzle according to claim 1 or 2, characterized in that the opening (10) is trapezoidal. Staubsaugerdüse nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Klappe (11) durch ein an der Außenseite der Staubsaugerdüse angeordnetes Bedienelement beweglich ist.Vacuum cleaner nozzle according to one of claims 1 to 3, characterized in that the flap (11) is movable by an operating element arranged on the outside of the vacuum cleaner nozzle. Staubsaugerdüse nach Anspruch 4, dadurch gekennzeichnet, dass das Bedienelement als Drehknopf (18) oder Drehknebel ausgebildet ist.Vacuum cleaner nozzle according to claim 4, characterized in that the operating element is designed as a rotary knob (18) or rotary knob. Staubsaugerdüse nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Klappe (11) durch einen Spindeltrieb (19, 20) beweglich ist.Vacuum cleaner nozzle according to one of claims 1 to 5, characterized in that the flap (11) is movable by a spindle drive (19, 20). Staubsaugerdüse nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Klappe (11) an Führungseinrichtungen (21) der Staubsaugerdüse, insbesondere des Saugkanals (9), längsverschieblich geführt ist.Vacuum cleaner nozzle according to one of Claims 1 to 6, characterized in that the flap (11) is guided in a longitudinally displaceable manner on guide devices (21) of the vacuum cleaner nozzle, in particular of the suction channel (9). Staubsaugerdüse nach Anspruch 7, dadurch gekennzeichnet, dass die Führungseinrichtungen (21) als Vorsprünge einstückig an den Saugkanal (9) angeformt sind.Vacuum cleaner nozzle according to claim 7, characterized in that the guide devices (21) are integrally formed as projections on the suction channel (9). Staubsaugerdüse nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Klappe (11) verschwenkbar ausgebildet ist.Vacuum cleaner nozzle according to one of claims 1 to 6, characterized in that the flap (11) is designed to be pivotable. Staubsaugerdüse nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass zwischen der Klappe (11) und der Öffnung (10) ein elastischer Kunststoffformkörper (24) angeordnet ist.Vacuum cleaner nozzle according to one of claims 1 to 9, characterized in that an elastic plastic molded body (24) is arranged between the flap (11) and the opening (10). Staubsaugerdüse nach Anspruch 10, dadurch gekennzeichnet, dass der Kunststoffformkörper (24) mit der Klappe (11) verbunden, insbesondere verklebt ist.Vacuum cleaner nozzle according to claim 10, characterized in that the molded plastic body (24) is connected to the flap (11), in particular is glued. Staubsaugerdüse nach Anspruch 10 oder 11, dadurch gekennzeichnet, dass der Kunststoffformkörper (24) aus offenporigem Schaumstoff gebildet ist.Vacuum cleaner nozzle according to claim 10 or 11, characterized in that the plastic molded body (24) is formed from open-cell foam. Staubsaugerdüse nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass die Öffnung (10) durch Stege (17) in mehrere Teilöffnungen unterteilt ist.Vacuum cleaner nozzle according to one of claims 1 to 12, characterized in that the opening (10) is divided into several partial openings by webs (17).
EP19195220.9A 2018-12-21 2019-09-03 Vacuum cleaner nozzle, especially a static vacuum cleaner floor nozzle Active EP3669732B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018133540.7A DE102018133540A1 (en) 2018-12-21 2018-12-21 Vacuum cleaner nozzle, in particular a static vacuum cleaner floor nozzle

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EP3669732A1 true EP3669732A1 (en) 2020-06-24
EP3669732B1 EP3669732B1 (en) 2022-10-19

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EP19195220.9A Active EP3669732B1 (en) 2018-12-21 2019-09-03 Vacuum cleaner nozzle, especially a static vacuum cleaner floor nozzle

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DE (1) DE102018133540A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022115600A1 (en) 2022-06-22 2023-12-28 Wessel-Werk Gmbh vacuum cleaner nozzle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19907580A1 (en) 1999-02-22 2000-08-31 Miele & Cie Vacuum cleaner mouthpiece, e.g. floor nozzle, with auxiliary air valve has vacuum channel entirely or partly of flexurally stiff material with closely spaced incisions forming valve elements
DE29923995U1 (en) 1999-02-22 2001-08-02 Miele & Cie. GmbH & Co., 33332 Gütersloh Vacuum cleaner mouthpiece, such as floor nozzle or the like. with a secondary air valve
CH692176A5 (en) * 1996-12-05 2002-03-15 Wessel Werk Gmbh Suction head with turbine rotor and secondary air inlet for vacuum cleaner
EP2432363A1 (en) * 2009-05-22 2012-03-28 Dyson Technology Limited Attachment for a vacuum cleaning appliance
US20170209009A1 (en) * 2016-01-27 2017-07-27 China Manufacturing And Brokerage, Inc. Vacuum cleaner power nozzle having selectively introduced secondary airflow for operation on carpeted surfaces

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Publication number Priority date Publication date Assignee Title
DE1844732U (en) * 1961-10-19 1962-01-11 Herbert Schmidt MOUTH PIECE FOR VACUUM CLEANER.
DE7825557U1 (en) * 1978-08-28 1979-08-23 Siemens Ag, 1000 Berlin Und 8000 Muenchen VACUUM CLEANER WITH A SUCTION NOZZLE CONNECTED BY A SUCTION PIPE
DE2923193A1 (en) * 1979-06-08 1980-12-11 Mauz & Pfeiffer Progress Suction nozzle for vacuum cleaner - has housing with subsidiary air valve consisting of seating, plate and spring
DE19851405C2 (en) * 1998-11-07 2003-04-03 Wessel Werk Gmbh Additional device for static vacuum cleaner nozzles

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH692176A5 (en) * 1996-12-05 2002-03-15 Wessel Werk Gmbh Suction head with turbine rotor and secondary air inlet for vacuum cleaner
DE19907580A1 (en) 1999-02-22 2000-08-31 Miele & Cie Vacuum cleaner mouthpiece, e.g. floor nozzle, with auxiliary air valve has vacuum channel entirely or partly of flexurally stiff material with closely spaced incisions forming valve elements
DE29923995U1 (en) 1999-02-22 2001-08-02 Miele & Cie. GmbH & Co., 33332 Gütersloh Vacuum cleaner mouthpiece, such as floor nozzle or the like. with a secondary air valve
EP2432363A1 (en) * 2009-05-22 2012-03-28 Dyson Technology Limited Attachment for a vacuum cleaning appliance
US20170209009A1 (en) * 2016-01-27 2017-07-27 China Manufacturing And Brokerage, Inc. Vacuum cleaner power nozzle having selectively introduced secondary airflow for operation on carpeted surfaces

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EP3669732B1 (en) 2022-10-19

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