EP1161915B1 - Air flow channel - Google Patents

Air flow channel

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Publication number
EP1161915B1
EP1161915B1 EP01107221A EP01107221A EP1161915B1 EP 1161915 B1 EP1161915 B1 EP 1161915B1 EP 01107221 A EP01107221 A EP 01107221A EP 01107221 A EP01107221 A EP 01107221A EP 1161915 B1 EP1161915 B1 EP 1161915B1
Authority
EP
European Patent Office
Prior art keywords
structuring
flow channel
air flow
suction
wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP01107221A
Other languages
German (de)
French (fr)
Other versions
EP1161915A3 (en
EP1161915A2 (en
Inventor
Ralf Dr. Sauer
Ernst Uwe Schiffer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vorwerk and Co Interholding GmbH
Original Assignee
Vorwerk and Co Interholding GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE10023408A external-priority patent/DE10023408A1/en
Application filed by Vorwerk and Co Interholding GmbH filed Critical Vorwerk and Co Interholding GmbH
Priority to SI200130666T priority Critical patent/SI1161915T1/en
Publication of EP1161915A2 publication Critical patent/EP1161915A2/en
Publication of EP1161915A3 publication Critical patent/EP1161915A3/en
Application granted granted Critical
Publication of EP1161915B1 publication Critical patent/EP1161915B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
    • F15D1/00—Influencing flow of fluids
    • F15D1/02—Influencing flow of fluids in pipes or conduits
    • F15D1/06—Influencing flow of fluids in pipes or conduits by influencing the boundary layer
    • F15D1/065—Whereby an element is dispersed in a pipe over the whole length or whereby several elements are regularly distributed in a pipe
    • 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
    • A47L9/0072—Mechanical means for controlling the suction or for effecting pulsating action
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/0081—Means for exhaust-air diffusion; Means for sound or vibration damping
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/02—Nozzles
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/24—Hoses or pipes; Hose or pipe couplings

Definitions

  • the invention relates to an air flow channel of a Marshssauguzes or -blasuzes, in particular a vacuum cleaner, according to the features of the preamble of claim 1.
  • suction and blowing ducts are to be adapted to the design of internal and external functional elements, such as bottlenecks, curves, normalized interfaces, etc., and on the other hand to be made favorable production, smooth, easily demoldable surfaces are preferred.
  • such surfaces in combination with secondary requirements lead to the disadvantage that a sequence of zones of different flow velocities leads to power losses.
  • a deposition of media in dead water areas or demoulding offset-ridge zones is observed.
  • this results in an increased noise emission.
  • disadvantages result from erosion and / or cavities in the impact areas.
  • the invention has the object to form an air flow channel of the assumed type advantageous.
  • This object is achieved initially and essentially by the subject matter of claim 1 by a leading to a microfluidizing structuring of the inner wall of the air flow channel.
  • an increased efficiency of the Swssaugilless is achieved.
  • the noise emission is reduced and the effects of production-related inaccuracies are reduced.
  • Deposits and abrasion are reduced.
  • the structuring according to the invention of the inner wall of the air flow channel an equally high air output at the suction or blowing nozzle can be achieved with reduced recording power of up to 20%.
  • the inner wall of the air flow channel has a structuring which favors the microfluidization and suppresses macro-swirling or dead water areas.
  • the structuring can be natural leaning or freely constructed and produced directly by means of photographing, etching, blasting, embossing, laminating, lacquering or by means of rapid prototyping, so that the structuring can be reproduced as desired. You can here on tools for forming processes, such. As injection molding, embossing or sintering.
  • the invention also provides that a conventional, standard air flow channel with a, a microfluidization inducing plastic film is pasted.
  • the structuring can represent approximately the surface of the skin of large fish, wherein further this structuring can be provided partially or even over the entire surface.
  • the structuring is groove-like.
  • a disorderly structured structuring is conceivable.
  • the structuring be formed on most of the inner wall of the air treatment channel from a suction air inlet to the Saug Kunststoffgebläseeinlass. Accordingly, it is also proposed that the structuring be formed on most of the inner wall of the air flow channel from a Blas Kunststoffgebläseauslass to a Blas Kunststoffauslass. Also, the invention provides that the structuring is formed in hundredths to tenths of a millimeter range.
  • the structuring according to the invention leads to an increase in the efficiency and thus the air power, to reduce the noise emission and to reduce deposition and wear by transported media, this without increasing the engine power. The sum of the benefits accumulates to increased environmental compatibility of the device.
  • the formed in the suction nozzle 3 suction air inlet is provided with the reference numeral 3 '.
  • an air flow channel 4 -in the case of the suction nozzle 3 on the vacuum cleaner 1- extends essentially as far as a suction air inlet 2 'of the suction / blower motor 2.
  • Both the vacuum cleaner 1 and the suction nozzle 3 each have an air flow channel 4, through which the sucked medium, a docked to the motor housing 5, not shown filter is passed through.
  • a portion of an air flow channel 4 is shown in a schematic sectional view.
  • the inner wall 6 of the air flow channel 4 is provided with a structuring 7 which, in the suction or blowing operation, leads to a microfluidization of the medium passed by.
  • This structuring can be generated directly by means of photographing, etching, blasting, embossing, laminating or lacquering or by means of rapid prototyping.
  • a plastic film provided with a structuring may also be applied to the inner wall 6 of the air flow channel.
  • an air cushion is created by the microfluidization in the region of the inner wall surface, which supports an undisturbed flow of the medium 8 in the air flow channel 4 (see Fig. 3).
  • the structuring 7 is of scale-like design with an orientation pointing in the direction of flow r the individual scales. These scales also have a substructuring 7 'according to FIG. 5. As can be seen, this substructuring 7 'can be formed by circular segment-shaped, optionally intermeshing grooves.
  • FIGS. 6 to 8 show various device sections or additional device parts with flow channels 4 according to the invention, having a structuring 7.

Abstract

An air flow channel (4) of domestic suction or blowing apparatus, especially a vacuum cleaner, has a structuring of the inner wall of the air flow channel leading to a micro-turbulence. The structuring is designed to be scaly. The structuring is designed to be groove-shaped and unordered. The structuring is designed on the largest part of the inner wall of the air flow channel from a suction air inlet to the suction fan inlet. The structuring is designed also on the largest part of the inner wall of the air flow channel from the fan outlet to a fan air outlet. The structuring is designed in the 100th to 10th of a millimetre range.

Description

Die Erfindung betrifft einen Luftströmungskanal eines Haushaltssauggerätes oder ―blasgerätes, insbesondere eines Staubsauggerätes, nach den Merkmalen des Oberbegriffes des Anspruches 1.The invention relates to an air flow channel of a Haushaltssauggerätes or -blasgerätes, in particular a vacuum cleaner, according to the features of the preamble of claim 1.

Zur Erzielung möglichst hoher Luftleistung bspw. an einer Staubsaugerdüse ist es ohne Erhöhung der Aufnahmeleistung des Motors üblich, Strömungswege hinsichtlich Durchmesser, Glätte, Umlenkung, Querschnitte und Querschnittsänderungen zu optimieren. Die mediumberührte Seite (Innenseite) von Saug- und Blaskanälen wird allgemein auf maximal erreichbare Glätte und Minimierung von Versatz, Totwassergebieten und Verwirbelungen eingestellt. Eine Luftleitungssteigerung durch Erhöhung der Aufnahmeleistung des Blas- bzw. Saugmotors führt zu einer erhöhten Geräuschemission. Zudem stellt sich ein schlechterer Wirkungsgrad ein, was zu einer Verkürzung der Lebensdauer des Motors führt. Zudem ergibt sich hieraus eine erhöhte Abrasion in dem Luftströmungskanal. Da Saug- und Blaskanäle an die Gestaltung innerer und äußerer Funktionselemente, wie Engstellen, Kurven, normierte Schnittstellen usw. anzupassen sind und andererseits herstellungsgünstig ausgebildet sein sollen, werden glatte, leicht entformbare Oberflächen bevorzugt. Derartige Oberflächen in Kombination mit sekundären Erfordernissen führen zum einen zu dem Nachteil, dass eine Abfolge von Zonen verschiedener Strömungsgeschwindigkeiten zu Leistungsverlusten führt. Zudem wird eine Ablagerung von Medien in Totwassergebieten bzw. entformungsbedingten Versatz-Grat-Zonen beobachtet. Darüber hinaus ergibt hier eine erhöhte Schallemission. Weiter ergeben sich Nachteile durch Erosion und/oder Kavitäten in den Prallgebieten.To achieve the highest possible air power, for example. On a vacuum cleaner nozzle, it is usual without increasing the power consumption of the motor to optimize flow paths in terms of diameter, smoothness, deflection, cross sections and cross-sectional changes. The wetted side (inside) of suction and blower channels is generally set for maximum achievable smoothness and minimization of offset, dead water, and swirl. Increasing the air intake by increasing the intake power of the blower or suction motor leads to increased noise emission. In addition, a worse efficiency, resulting in a shortening of the life of the engine leads. In addition, this results in an increased abrasion in the air flow channel. Since suction and blowing ducts are to be adapted to the design of internal and external functional elements, such as bottlenecks, curves, normalized interfaces, etc., and on the other hand to be made favorable production, smooth, easily demoldable surfaces are preferred. On the one hand, such surfaces in combination with secondary requirements lead to the disadvantage that a sequence of zones of different flow velocities leads to power losses. In addition, a deposition of media in dead water areas or demoulding offset-ridge zones is observed. In addition, this results in an increased noise emission. Furthermore, disadvantages result from erosion and / or cavities in the impact areas.

Aus dem nächstliegenden Stand der Technik US-A-5 953 787 ist ein Luftströmungskanal eines Haushaltsgerätes bekannt, der auf seiner Innenfläche mit Haaren einer bestimmten Länge besetzt ist. Im Weiteren ist es bekannt, vgl. DE 26 15 507 A1, den Strömungskanal eines Haushaltsgerätes auf der Innenseite mit einem gerauhten Gewebe oder einem sonstigen gerauhten Textilen-Material auszukleiden. Darüber hinaus auch, eine Beflockung vorzusehen.From the closest prior art US-A-5 953 787 an air flow channel of a household appliance is known, which is occupied on its inner surface with hair of a certain length. Furthermore, it is known, cf. DE 26 15 507 A1, to line the flow channel of a household appliance on the inside with a roughened fabric or other roughened textile material. In addition, also to provide a flocking.

Ausgehend von dem zunächst genannten Stand der Technik stellt sich der Erfindung die Aufgabe, einen Luftströmungskanal der vorausgesetzten Art vorteilhaft auszubilden.Starting from the initially mentioned prior art, the invention has the object to form an air flow channel of the assumed type advantageous.

Diese Aufgabe ist beim Gegenstand des Anspruches 1 gelöst, wobei darauf abgestellt ist, dass die Strukturierung im Hunderstel- bis Zehntel-Millimeter-Bereich ausgebildet ist und dass die Strukturierung schuppenartig ausgebildet ist. Hierdurch ist ein erhöhter Wirkungsgrad des 1 laushaltssauggerätes erzielt.This object is achieved in the subject matter of claim 1, wherein it is pointed out that the structuring is formed in the hundredth to tenths of a millimeter range and that the structuring is formed like scales. As a result, an increased efficiency of the laushaltssauggerätes is achieved.

Im Hinblick auf den zuvor beschriebenen Stand der Technik wird eine technische Problematik der Erfindung darin gesehen, einen Luftströmungskanal der in Rede stehenden Art derart in vorteilhafter Weise weiterzubilden, dass sich eine Erhöhung des Wirkungsgrades des Haushaltssauggerätes oder -blasgerätes einstellt.In view of the above-described prior art, a technical problem of the invention is seen in such an advantageous manner to further develop an air flow channel of the type in question that adjusts an increase in the efficiency of Haushaltssauggerätes or -blasgerätes.

Diese Aufgabe ist zunächst und im wesentlichen durch den Gegenstand des Anspruches 1 durch eine zu einer Mikroverwirbelung führende Strukturierung der Innenwandung des Luftströmungskanales gelöst. Zufolge dieser Ausgestaltung ist ein erhöhter Wirkungsgrad des Haushaltssauggerätes erzielt. Desweiteren wird die Schallemission verringert sowie die Einflüsse von fertigungsbedingten Ungenauigkeiten reduziert. Ablagerungen sowie Abrasion werden verringert. Als Folge der erfindungsgemäßen Strukturierung der Innenwandung des Luftströmungskanales läßt sich eine gleich hohe Luftleistung an der Saug- oder Blasdüse bei verringerter Aufnahmeleistung von bis zu 20 % erzielen. Die Innenwandung des Luftströmungskanales weist erfindungsgemäß eine Strukturierung auf, die die Mikroverwirbelung begünstigt und Makroverwirbelungen bzw. Totwassergebiete unterdrückt. Die Strukturierung kann naturentlehnt oder frei konstruiert sein und mittels Fotografierens, Ätzens, Strahlens, Prägens, Kaschierens, Lackierens oder mittels Rapid-Prototyping direkt erzeugt werden, so dass die Strukturierung beliebig vervielfältigbar ist. Sie kann hierbei auf Werkzeuge für formgebende Verfahren, wie z. B. Spritzgießen, Prägen oder Sintern übertragen werden. Darüber hinaus ist erfindungsgemäß auch vorgesehen, dass ein üblicher, serienmäßiger Luftströmungskanal mit einer, eine Mikroverwirbelung herbeiführende Kunststoffolie beklebt ist. So kann die Strukturierung annähernd die Oberfläche der Haut von Grossfischen darstellen, wobei weiter diese Strukturierung partiell oder auch vollflächig vorgesehen sein kann. Weiter ist auch denkbar, dass die Strukturierung rillenartig ausgebildet ist. Zudem ist auch eine ungeordnet ausgebildete Strukturierung denkbar. Weiter wird vorgeschlagen, dass die Strukturierung auf dem größten Teil der Innenwandung des Luftsträmungskanales von einem Sauglufteinlass bis zum Saugluftgebläseeinlass ausgebildet ist. Entsprechend wird auch vorgeschlagen, dass die Strukturierung auf dem größten Teil der Innenwandung des Luftströmungskanales von einem Blasluftgebläseauslass bis zu einem Blasluftauslass ausgebildet ist. Auch ist erfindungsgemäß vorgesehen, dass die Strukturierung im Hundertstel- bis Zehntel-Millimeter-Bereich ausgebildet ist. Die erfindungsgemäße Strukturierung führt zu einer Anhebung des Wirkungsgrades und damit der Luftleistung, zur Verringerung der Schallemission sowie zur Verringerung von Ablagerung und Verschleiß durch transportierte Medien, dies ohne Anhebung der Motorleistung. Die Summe der Vorteile kumuliert zu erhöhter Umweltverträglichkeit des Gerätes.This object is achieved initially and essentially by the subject matter of claim 1 by a leading to a microfluidizing structuring of the inner wall of the air flow channel. According to this embodiment, an increased efficiency of the Haushaltssauggerätes is achieved. Furthermore, the noise emission is reduced and the effects of production-related inaccuracies are reduced. Deposits and abrasion are reduced. As a result of the structuring according to the invention of the inner wall of the air flow channel, an equally high air output at the suction or blowing nozzle can be achieved with reduced recording power of up to 20%. According to the invention, the inner wall of the air flow channel has a structuring which favors the microfluidization and suppresses macro-swirling or dead water areas. The structuring can be natural leaning or freely constructed and produced directly by means of photographing, etching, blasting, embossing, laminating, lacquering or by means of rapid prototyping, so that the structuring can be reproduced as desired. You can here on tools for forming processes, such. As injection molding, embossing or sintering. In addition, the invention also provides that a conventional, standard air flow channel with a, a microfluidization inducing plastic film is pasted. Thus, the structuring can represent approximately the surface of the skin of large fish, wherein further this structuring can be provided partially or even over the entire surface. Furthermore, it is also conceivable that the structuring is groove-like. In addition, a disorderly structured structuring is conceivable. Furthermore, it is proposed that the structuring be formed on most of the inner wall of the air treatment channel from a suction air inlet to the Saugluftgebläseeinlass. Accordingly, it is also proposed that the structuring be formed on most of the inner wall of the air flow channel from a Blasluftgebläseauslass to a Blasluftauslass. Also, the invention provides that the structuring is formed in hundredths to tenths of a millimeter range. The structuring according to the invention leads to an increase in the efficiency and thus the air power, to reduce the noise emission and to reduce deposition and wear by transported media, this without increasing the engine power. The sum of the benefits accumulates to increased environmental compatibility of the device.

Nachstehend ist die Erfindung anhand der beigefügten Zeichnung, welche lediglich Ausführungsbeispiele darfstellt, näher erläutert. Es zeigt:

Fig. 1
ein Ilaushaltssauggerät in Form eines Staubsauggeräts in perspektivischer Darstellung;
Fig. 2
eine schematische Teildarstellung eines, die erfindungsgemäße, innenwandungsseitige Strukturierung aufweisenden Luftströmungskanals;
Fig. 3
eine schematische Schnittdarstellung gemäß der Linie III-III in Fig. 2;
Fig. 4
eine Herausvergrößerung des Bereiches IV in Fig. 2;
Fig. 5
eine mikroskopische Vergrößerung des Bereiches V in Fig. 4;
Fig. 6
eine Ansicht gegen das, einen erfindungsgemäßen Luftströmungskanal aufweisenden Motor-/Filter-Gehäuse des Staubsauggerätes gemäß Fig. 1;
Fig. 7
eine perspektivische Darstellung einer Saugdüse des Staubsauggerätes;
Fig. 8
eine partiell geschnittene, perspektivische Prinzipdarstellung einer Saugdüse mit einem, die erfindungsgemäße Strukturierung aufweisendem Luftströmungskanal.
Below, the invention with reference to the accompanying drawings, which only exemplary embodiments may be explained in more detail. It shows:
Fig. 1
a Ilaushaltssauggerät in the form of a vacuum cleaner in perspective view;
Fig. 2
a schematic partial view of an inventive, the inner wall side structuring having air flow channel;
Fig. 3
a schematic sectional view along the line III-III in Fig. 2;
Fig. 4
an enlargement of the area IV in Fig. 2;
Fig. 5
a microscopic enlargement of the area V in Fig. 4;
Fig. 6
a view against the, an inventive air flow channel having engine / filter housing of the vacuum cleaner of FIG. 1;
Fig. 7
a perspective view of a suction nozzle of the vacuum cleaner;
Fig. 8
a partially sectioned, perspective schematic representation of a suction nozzle with a structuring according to the invention exhibiting air flow channel.

Dargestellt und beschrieben ist zunächst mit Bezug zu Fig. 1 ein Haushaltsgerät in Form eines Staubsauggerätes 1, mit einem Saug-/Gebläsemotor 2 und einer zugeordneten Saugdüse 3.With reference to FIG. 1, a domestic appliance in the form of a vacuum cleaner 1, having a suction / blower motor 2 and an associated suction nozzle 3, is shown and described.

Der in der Saugdüse 3 ausgebildete Sauglufteinlaß ist mit dem Bezugszeichen 3' versehen. Von diesem ausgehend erstreckt sich ein Luftströmungskanal 4 -bei Anordnung der Saugdüse 3 an dem Staubsauggerät 1- im wesentlichen bis hin zu einem Sauglufteinlaß 2' des Saug-/Gebläsemotors 2.The formed in the suction nozzle 3 suction air inlet is provided with the reference numeral 3 '. Starting from this, an air flow channel 4 -in the case of the suction nozzle 3 on the vacuum cleaner 1-extends essentially as far as a suction air inlet 2 'of the suction / blower motor 2.

Sowohl das Staubsauggerät 1 als auch die Saugdüse 3 verfügen jeweils über einen Luftströmungskanal 4, durch welchen das angesaugte Medium, einen an dem Motorgehäuse 5 angedockten, nicht dargestellten Filter durchströmend geleitet wird.Both the vacuum cleaner 1 and the suction nozzle 3 each have an air flow channel 4, through which the sucked medium, a docked to the motor housing 5, not shown filter is passed through.

In Fig. 2 ist ein Abschnitt eines Luftströmungskanales 4 in einer schematischen Schnittdarstellung gezeigt. Erfindungsgemäß ist die Innenwandung 6 des Luftströmungskanales 4 mit einer Strukturierung 7 versehen, welche im Saug- oder auch Blasbetrieb zu einer Mikroverwirbelung des vorbeigeführten Mediums führt. Diese Strukturierung kann mittels Fotografierens, Ätzens, Strahlens, Prägens, Kaschierens oder Lackierens oder mittels Rapid-Prototyping direkt erzeugt sein. Alternativ kann auch eine mit einer Strukturierung versehene Kunststofffolie auf der Innenwandung 6 des Luftströmungskanales aufgebracht sein.In Fig. 2, a portion of an air flow channel 4 is shown in a schematic sectional view. According to the invention, the inner wall 6 of the air flow channel 4 is provided with a structuring 7 which, in the suction or blowing operation, leads to a microfluidization of the medium passed by. This structuring can be generated directly by means of photographing, etching, blasting, embossing, laminating or lacquering or by means of rapid prototyping. Alternatively, a plastic film provided with a structuring may also be applied to the inner wall 6 of the air flow channel.

Durch die so geschaffene Oberfläche der Innenwandung 6 des Luftströmungskanales 4 wird eine Mikroverwirbelung begünstigt, jedoch eine Makroverwirbelung bzw. Totwassergebiete unterdrückt, so daß bei gleicher Aufnahmeleistung des Saug-/Gebläsemotors 2 eine erhöhte Luftleistung bzw. bei gleich hoher Luftleistung eine verringerte Aufnahmeleistung erzielt ist. Zufolge der erfindungsgemäßen Ausgestaltung wird durch die Mikroverwirbelung im Bereich der Innenwandungsoberfläche ein Luftpolster geschaffen, welches ein ungestörtes Strömen des Mediums 8 in dem Luftströmungskanal 4 unterstützt (vergl. Fig. 3).Due to the thus created surface of the inner wall 6 of the air flow channel 4, a microfluidization is favored, but a Makroverwirbelung or Totwassergebiete suppressed, so that at the same recording power of the suction / blower motor 2, an increased air power or at the same high air power, a reduced power consumption is achieved. According to the embodiment of the invention, an air cushion is created by the microfluidization in the region of the inner wall surface, which supports an undisturbed flow of the medium 8 in the air flow channel 4 (see Fig. 3).

Wie in Fig. 4 dargestellt, ist in dem Ausführungsbeispiel die Strukturierung 7 schuppenartig ausgebildet mit einer in Strömungsrichtung r weisenden Ausrichtung der einzelnen Schuppen. Diese Schuppen weisen weiter eine Unterstrukturierung 7' gemäß Fig. 5 auf. Wie zu erkennen, kann diese Unterstrukturierung 7' durch kreisabschnittförmige, gegebenenfalls ineinandergreifende Rillen gebildet sein.As shown in FIG. 4, in the exemplary embodiment, the structuring 7 is of scale-like design with an orientation pointing in the direction of flow r the individual scales. These scales also have a substructuring 7 'according to FIG. 5. As can be seen, this substructuring 7 'can be formed by circular segment-shaped, optionally intermeshing grooves.

Die Fig. 6 bis 8 zeigen verschiedene Geräteabschnitte bzw. Gerätezusatzteile mit erfindungsgemäßen, eine Strukturierung 7 aufweisenden Strömungskanälen 4.FIGS. 6 to 8 show various device sections or additional device parts with flow channels 4 according to the invention, having a structuring 7.

Claims (6)

  1. Airflow channel (4) of a household suction or blowing appliance, in particular a vacuum cleaner, with structuring of the inner wall of the airflow channel (4) which leads to microswirling, characterised in that the structuring is formed in the region of one-hundredth to one-tenth of a millimetre and in that the structuring is imbricated.
  2. Airflow channel according to claim 1, characterised in that substructuring is provided.
  3. Airflow channel according to claim 2, characterised in that the substructuring is groove-like.
  4. Airflow channel according to any of claims 1 to 3, characterised in that the structuring is imbricated,
  5. Airflow channel according to any of claims 1 to 4, characterised in that the structuring is groove-like.
  6. Airflow channel according to any of claims 1 to 4, characterised in that the structuring is random.
EP01107221A 2000-04-18 2001-03-23 Air flow channel Expired - Lifetime EP1161915B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200130666T SI1161915T1 (en) 2000-04-18 2001-03-23 Air flow channel

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10019125 2000-04-18
DE10019125 2000-04-18
DE10023408 2000-05-12
DE10023408A DE10023408A1 (en) 2000-04-18 2000-05-12 Air flow channel of domestic suction or blowing apparatus, especially vacuum cleaner has structuring of inner wall of air flow channel leading to micro-turbulence designed to be scaly, groove-shaped and unordered.

Publications (3)

Publication Number Publication Date
EP1161915A2 EP1161915A2 (en) 2001-12-12
EP1161915A3 EP1161915A3 (en) 2005-04-20
EP1161915B1 true EP1161915B1 (en) 2006-10-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP01107221A Expired - Lifetime EP1161915B1 (en) 2000-04-18 2001-03-23 Air flow channel

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EP (1) EP1161915B1 (en)
AT (1) ATE341268T1 (en)
DE (1) DE50111125D1 (en)
ES (1) ES2270913T3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7845046B2 (en) 2003-10-15 2010-12-07 Black & Decker, Inc. Hand-held cordless vacuum cleaner
US8032984B2 (en) 2006-01-27 2011-10-11 Black & Decker Inc. Vacuum cleaner filter cleaning mechanisms

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106949099B (en) * 2017-04-28 2019-05-10 苏州市海朋电子商务有限公司 Dust catcher motor air pump

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
FR685301A (en) * 1929-11-23 1930-07-09 Stepped inner surface pipe
DE2615507A1 (en) * 1976-04-09 1977-10-20 Mauz & Pfeiffer Progress VACUUM CLEANERS, IN PARTICULAR ELECTRICALLY POWERED HOUSEHOLD VACUUM CLEANERS
JP3047984B2 (en) * 1990-04-18 2000-06-05 株式会社日立製作所 Electric vacuum cleaner
US5067584A (en) * 1990-04-25 1991-11-26 Williams William H Low cost replaceable type sound dampening unit for vacuum cleaning machine
KR0136305Y1 (en) * 1996-09-10 1999-02-01 최진호 Suction nozzle of a vacuum cleaner
DE19836873A1 (en) * 1998-06-24 1999-12-30 Montaplast Gmbh Guide structure for the air intake or air/fuel mixture flow at a motor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7845046B2 (en) 2003-10-15 2010-12-07 Black & Decker, Inc. Hand-held cordless vacuum cleaner
US8549704B2 (en) 2003-10-15 2013-10-08 Black & Decker Inc. Hand-held cordless vacuum cleaner
US8032984B2 (en) 2006-01-27 2011-10-11 Black & Decker Inc. Vacuum cleaner filter cleaning mechanisms

Also Published As

Publication number Publication date
EP1161915A3 (en) 2005-04-20
EP1161915A2 (en) 2001-12-12
DE50111125D1 (en) 2006-11-16
ES2270913T3 (en) 2007-04-16
ATE341268T1 (en) 2006-10-15

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