EP2201878B1 - Aspirateur doté d'un séparateur de force centrifuge - Google Patents

Aspirateur doté d'un séparateur de force centrifuge Download PDF

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Publication number
EP2201878B1
EP2201878B1 EP20090178063 EP09178063A EP2201878B1 EP 2201878 B1 EP2201878 B1 EP 2201878B1 EP 20090178063 EP20090178063 EP 20090178063 EP 09178063 A EP09178063 A EP 09178063A EP 2201878 B1 EP2201878 B1 EP 2201878B1
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EP
European Patent Office
Prior art keywords
cyclone
air
vacuum cleaner
guide means
air guide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP20090178063
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German (de)
English (en)
Other versions
EP2201878A2 (fr
EP2201878A3 (fr
Inventor
Julian Kastner
Markus Kraus
Florian Schmitt
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
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Publication date
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Publication of EP2201878A2 publication Critical patent/EP2201878A2/fr
Publication of EP2201878A3 publication Critical patent/EP2201878A3/fr
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Publication of EP2201878B1 publication Critical patent/EP2201878B1/fr
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/16—Arrangement or disposition of cyclones or other devices with centrifugal action
    • A47L9/1608—Cyclonic chamber constructions
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/08—Vortex chamber constructions
    • B04C5/103—Bodies or members, e.g. bulkheads, guides, in the vortex chamber

Definitions

  • the present invention relates to a vacuum cleaner having a centrifugal separator having an air inlet passage connected to a suction air guide for dust-laden suction air, a separation space and an air outlet communicating with the separation space via a dip tube and discharging the purified air to the environment. wherein the air inlet duct opens into the centrifugal separator.
  • Such vacuum cleaners are known from the prior art.
  • Components of such a vacuum cleaner are essentially one or more nozzles for receiving the dust, a suction pipe, which is designed depending on the structure of the vacuum cleaner as a floor, hand or upright vacuum cleaner shorter or longer or rigid or telescopic, a connector which connecting the suction tube with a flexible suction hose, one or more dust container, which may be part of or the centrifugal or is designed as a separate dust collector, a vacuum chamber through which the air is sucked by a motor-blower unit, and given if a fine dust filter for final cleaning of the escaping air.
  • the US 2007/0209340 A1 a vacuum cleaner with a centrifugal separator, in which a particle-containing stream enters through an air inlet in the separation chamber of the centrifugal separator and is there offset by a spiral ramp in a cyclonic circulation.
  • the invention has for its object to provide a vacuum cleaner with an improved centrifugal separator, which avoids turbulence in the inlet region, as well as an increased volume flow provides while reducing the noise.
  • the vacuum cleaner according to the invention with a centrifugal separator is achieved by a centrifugal separator comprising an air guide means, wherein the air guide means is an area which is generated by continuous spiraling of a space curve about the axis of the centrifugal separator, and that a slope of the air guide means begins in an air inlet duct.
  • a centrifugal separator comprising an air guide means, wherein the air guide means is an area which is generated by continuous spiraling of a space curve about the axis of the centrifugal separator, and that a slope of the air guide means begins in an air inlet duct.
  • centrifugal separator in a centrifugal separator, the rotationally-displaced air separates the dust into the dust-collecting area of the separation space by means of centrifugal forces, or the dust is ejected through a dust outlet into a separate dust-collecting space separate from the separation space.
  • An air outlet which communicates via a dip tube with the separation chamber leads the cleaned air to another downstream filter unit or to the environment.
  • Centrifugal separators can be both an integral part of the vacuum cleaner, or be used as a separate unit in a plenum. At least the dust collector can be removed from the vacuum cleaner. Such centrifugal separator are used in particular in so-called bagless vacuum cleaners.
  • air guidance means those devices are to be considered, which divert the incoming air from its original flow direction in another flow direction.
  • the air inlet is advantageously tangential to an air flow in the centrifugal separator and the air guide means deflect the incoming air into a perpendicular to the air inlet protruding helix.
  • the air is thereby converted with largely avoiding turbulence at the entry point and with the lowest possible resistance in a preferably spiral-shaped rotational movement. This ensures that the incoming air and the rotating air are located at the entry point in spaced-apart planes and flow largely unaffected by each other, or almost without mutual collision.
  • the air guide means extends by a maximum of one revolution about the axis of the centrifugal separator.
  • the air guiding means can guide the air for a maximum of one revolution about the radial axis and thereby unfold the air flow with the dust particles without a limiting channel formation.
  • a limiting channel may be disadvantageous in that as large, heavy particles only half a revolution, small, light particles, however, require around three revolutions to reach the ejection into the dust collector.
  • the air guide means has a steady, progressive or degressive slope in the direction of the screw.
  • the helix has a constant pitch, with a progressive pitch, the pitch of the helix increases, with a degressive pitch, the pitch of the helix decreases.
  • a steady pitch of the helix accelerates the dust particles evenly, with contact of the particles with the air-guiding means is largely avoided.
  • a progressive slope in particular, ejects the particles into the separation space at the end of the slope and advantageously avoids a collision with the inflowing particles.
  • a degressive pitch can be used advantageously in small centrifugal separators to achieve small heights.
  • the space curve is a straight line, a convex or a concave curve.
  • a convex curve is an outwardly, ie curved into the separation chamber, under a concave curve is to be understood inwardly, ie curved away from the discharge side shape.
  • the term curve includes symmetric as well as subsections of symmetric and asymmetric geometries.
  • a straight line can be converted into a tool shape with simple means. Curves may have the advantage that at the radial transitions from the air guide means to the inner boundary walls of the centrifugal separator radii are present, which advantageously avoid areas with turbulence and dust deposits.
  • the space curve is inclined at an angle between 45 and 135 degrees to the axis of the screwing and, in a particular embodiment, is oriented perpendicular to the axis of the screwing.
  • the angle is between the axis of the centrifugal separator, which extends from the air inlet to the dust discharge, and the space curve.
  • the surface of the air guiding means points towards the air inlet, at an angle of 135 degrees it shows the surface of the air guiding means in the direction of the dust ejection.
  • the surface is perpendicular to the centrifugal separator.
  • An inclined into the center of the centrifugal separator air guide surface that is at an angle greater than 90 degrees, can advantageously support the centrifugal force acting on the particle to the effect that during the radial movement to the outside an additional axial movement component is generated in the direction of the dust ejection out.
  • a space axis projecting perpendicularly from the axis of the centrifugal separator can advantageously combine the properties of a tilted or rising air guiding means and achieves the best measuring results for an average dust.
  • the air guide means has an axial extent with a length between about two thirds of the maximum height of the air inlet channel and the maximum height of the air inlet channel.
  • An axial extension is directed in the direction of the axis of the centrifugal separator.
  • the term height is the extent defined in the axial direction.
  • the air guide means formed integrally with the centrifugal separator or constitutes a separate component of the centrifugal separator.
  • a one-piece design of the air guide means together with the inner wall of the centrifugal separator allow a simple tool design and easy assembly assembly.
  • With a separate component design of the air guiding means advantageously more complex geometries can be displayed.
  • Wear-resistant or differently colored materials are used.
  • the air guide means is arranged on a removable or movable housing part of the centrifugal separator.
  • the air guide means on a removable or movable housing part of Centrifugal separator be arranged.
  • the air guidance means preferably extends in the radial direction away from the axis of the centrifugal separator to the inner wall of the centrifugal separator.
  • the particles over the full available width, ie in the radial direction are detected by the air guide means, accelerated to the outside and experienced a spiral or screw movement.
  • the air guide means extends in the radial direction away from the axis of the centrifugal separator and has a distance to the inner wall.
  • Small light particles take more turns to reach the ejection window than large, heavy particles.
  • the air-guiding means are advantageously at a distance from the inner wall, the accelerations caused by the screwing movement of the air, in particular, can act on their own radial centrifugal forces, as well as on their axial forces. This effect results from the short residence time of the particles in the area of the air duct.
  • Particularly small particles can thereby experience a safe acceleration.
  • no particles can settle between the air guide means and the inner wall of the centrifugal separator as a result of the full-surface air flow on the inner wall, so that a hygienic impression persists, especially in transparent versions after prolonged operation.
  • the air guiding means preferably starts at a boundary surface of the centrifugal separator lying opposite an ejection.
  • the inflowing air flow can be immediately offset in a spiral or screw movement.
  • the air guide means ends at the end of a slope with a flat plateau.
  • air flowing in from the air inlet channel can thereby be prevented from the rotating spiral or screw movement.
  • the air guide means is arranged in an advantageous manner with respect to an oblique ejection surface.
  • turbulences in the region of the air outlet can thereby be avoided.
  • an oblique ejection surface is meant a plane which is not oriented orthogonally to the axis of the centrifugal separator.
  • At least the air inlet channel preferably opens tangentially into the separation chamber.
  • the air inlet is tangential to an air flow in the centrifugal separator and the air guide means deflect the incoming air into a helix perpendicular to the air inlet. The air is thereby converted with largely avoiding turbulence at the entry point and with the lowest possible resistance in a preferably helical or spiral rotational movement.
  • the present invention facilitates with simple and constructive means the realization of a centrifugal separator in which especially a noise reduction and an increased volume flow can be achieved. Furthermore, a higher overall efficiency and an increase in efficiency is achieved.
  • FIG. 1 an inventive vacuum cleaner 1 is shown, is sucked in the dust-laden air via a floor nozzle and a Saugluft Unit 4, consisting of a length-adjustable suction pipe, a connector to a flexible suction hose into the interior of a housing of the vacuum cleaner 1.
  • a centrifugal separator 2 in the FIGS. 2 to 6 is shown in detail.
  • the centrifugal separator 2 has a tubular air inlet duct 3, which adjoins the suction air duct 4 of the vacuum cleaner 1 in such a way that the air from the suction air duct 4 flows through it tangentially into the centrifugal separator 2. From there, the air passes into a substantially cylindrical separation chamber 5, in which, similar to a centrifuge according to the principle of centrifugal force, the dust from the air is deposited.
  • An air outlet 6 of the centrifugal separator 2 is connected via a dip tube 7 with the separation chamber 5.
  • an air guide means 8 in the form of a surface 9 is provided starting from the lower boundary surface 23 of the separation chamber 5, which results from continuous screwing 10 of a radius 14 of a longitudinal axis 11 of the separation chamber 4 about this longitudinal axis 11.
  • the air guiding means 8 is formed in one piece with a designed as a pivotable lid housing part 19 of the centrifugal separator 2.
  • the lid can be opened to clean the separation chamber 4.
  • the lid also covers a collecting chamber, not shown, of the centrifugal separator 2, which can be emptied when the lid is opened.
  • the threaded surface 9 of the air guide means begins from the mouth of the air inlet duct 3 in the direction of the screw 10 after about 2/3 of a full turn 12 about the longitudinal axis 11 of the centrifugal separator 2.
  • the threaded surface 9 of the air duct 8 ends 24 after about 1 / 3 of a full turn 12 at the screw 10 facing edge of the mouth of the air inlet channel 3 and there has an axial extent 17 which corresponds approximately to the height of the mouth of the inlet channel 3. This can ensure that the deflected air does not collide with newly air flowing through the air inlet duct 3 and thereby undesirable turbulence. From the straight edge formed by the end 24 of the surface 9 of the air guiding means 8 extends radially, i.
  • the surface 9 of the air guiding means 8 has a linear slope.
  • the surface 9 extends in the radial direction of the separation chamber 5 from the central dip tube 7 up to the wall 20 of the cylindrical separation chamber 5.
  • the centrifugal separator 2 operates as follows: Air flowing in through the air inlet duct 3 is directed onto the helical path by the air guiding means 8 and flows on this path in the direction of an obliquely arranged ejection surface 16 and an ejection 22 of the separating chamber 5 of the centrifugal separator 2 Centrifugal forces collects while the dust on the wall 20 of the separation chamber and moves there on a spiral path in the direction of ejection 22, through which he leaves the separation chamber 4 and enters the collection chamber. The air, however, undergoes a deflection at the level of the ejection 22 of the separation chamber 4 and leaves the separation chamber 4 through the dip tube 7 and the outlet 6 in the direction of the blower of the vacuum cleaner. 1
  • the air guiding means 8 not only improves the dust separation but also reduces the noise generated by the centrifugal separator 2. This may be the comparison of FIGS. 7 and 8 are taken, in each of which the sound power of a centrifugal separator 2 is indicated as a function of frequency. It shows FIG. 7 the sound power of a centrifugal separator 2 without air guide means 8 and FIG. 8 However, it shows that a significant improvement can be achieved, especially in the case of the particularly unpleasant middle frequencies.
  • the present invention facilitates with simple and constructive means the realization of a centrifugal separator 2 in which particularly a noise reduction and an increased volume flow are achieved. Furthermore, a higher overall efficiency and an increase in efficiency is achieved.

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

Claims (14)

  1. Aspirateur (1) doté d'un séparateur à force centrifuge (2) qui présente un conduit d'entrée d'air (3) relié à un guidage d'air d'aspiration (4) pour l'air d'aspiration chargé de poussière, une chambre de séparation (5) et une sortie d'air (6) qui est en communication avec la chambre de séparation (5) par l'intermédiaire d'un tube plongeur (7), le conduit d'entrée d'air (3) aboutissant dans le séparateur à force centrifuge (2), caractérisé en ce que le séparateur à force centrifuge (2) comprend un moyen de guidage d'air (8), le moyen de guidage d'air (8) étant une surface (9) qui est générée par un mouvement en hélice continu (10) d'une courbe spatiale autour de l'axe (11) du séparateur à force centrifuge (2) et en ce qu'un gradient (13) du moyen de guidage d'air (8) commence dans le conduit d'entrée d'air (3).
  2. Aspirateur (1) doté d'un séparateur à force centrifuge (2) selon la revendication 1, caractérisé en ce que le moyen de guidage d'air (8) s'étend de maximum une rotation (12) autour de l'axe (11) du séparateur à force centrifuge (2).
  3. Aspirateur (1) doté d'un séparateur à force centrifuge (2) selon la revendication 1 ou 2, caractérisé en ce que le moyen de guidage d'air (8) possède un gradient continu, progressif ou dégressif (13) en direction du mouvement en hélice (10).
  4. Aspirateur (1) doté d'un séparateur à force centrifuge (2) selon l'une quelconque des revendications précédentes, caractérisé en ce que la courbe spatiale est une droite ou une courbe convexe ou une courbe concave.
  5. Aspirateur (1) doté d'un séparateur à force centrifuge (2) selon l'une quelconque des revendications précédentes, caractérisé en ce que la courbe spatiale est inclinée dans un angle compris entre 45 et 135 degrés par rapport à l'axe (11) du mouvement en hélice (10) et, dans une réalisation particulière, est dirigée perpendiculairement à l'axe (11) du mouvement en hélice (10).
  6. Aspirateur (1) doté d'un séparateur à force centrifuge (2) selon l'une quelconque des revendications précédentes, caractérisé en ce que le moyen de guidage d'air (8) présente une étendue axiale (17) ayant une longueur comprise entre environ deux tiers de la hauteur maximale du conduit d'entrée d'air (3) et la hauteur maximale du conduit d'entrée d'air (3).
  7. Aspirateur (1) doté d'un séparateur à force centrifuge (2) selon l'une quelconque des revendications précédentes, caractérisé en ce que le moyen de guidage d'air (8) est réalisé d'une seule pièce avec le séparateur à force centrifuge (2) ou représente une partie séparée du séparateur à force centrifuge (2).
  8. Aspirateur (1) doté d'un séparateur à force centrifuge (2) selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le moyen de guidage d'air (8) est disposé sur une partie de boîtier (19) du séparateur à force centrifuge (2), amovible ou mobile.
  9. Aspirateur (1) doté d'un séparateur à force centrifuge (2) selon l'une quelconque des revendications précédentes, caractérisé en ce que le moyen de guidage d'air (8) s'étend en direction radiale en s'éloignant de l'axe (11) du séparateur à force centrifuge (2) jusqu'à la paroi intérieure (20) du séparateur à force centrifuge (2).
  10. Aspirateur (1) doté d'un séparateur à force centrifuge (2) selon l'une quelconque des revendications 1 à 8, caractérisé en ce que le moyen de guidage d'air (8) s'étend en direction radiale en s'éloignant de l'axe (11) du séparateur à force centrifuge (2) et possède un écart (21) par rapport à la paroi intérieure (20).
  11. Aspirateur (1) doté d'un séparateur à force centrifuge (2) selon l'une quelconque des revendications précédentes, caractérisé en ce que le moyen de guidage d'air (8) commence sur une surface de délimitation (23) du séparateur à force centrifuge (2), située en face d'une éjection (22).
  12. Aspirateur (1) doté d'un séparateur à force centrifuge (2) selon l'une quelconque des revendications précédentes, caractérisé en ce que le moyen de guidage d'air (8) se termine par un plateau plat à l'extrémité (24) d'un gradient (13).
  13. Aspirateur (1) doté d'un séparateur à force centrifuge (2) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une surface d'éjection inclinée (16) est disposée en face du moyen de guidage d'air (8).
  14. Aspirateur (1) doté d'un séparateur à force centrifuge (2) selon l'une quelconque des revendications précédentes, caractérisé en ce que le conduit d'entrée d'air (3) aboutit de préférence tangentiellement dans la chambre de séparation (5).
EP20090178063 2008-12-19 2009-12-04 Aspirateur doté d'un séparateur de force centrifuge Active EP2201878B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008055047A DE102008055047A1 (de) 2008-12-19 2008-12-19 Staubsauger mit einem Fliehkraftabscheider

Publications (3)

Publication Number Publication Date
EP2201878A2 EP2201878A2 (fr) 2010-06-30
EP2201878A3 EP2201878A3 (fr) 2011-09-07
EP2201878B1 true EP2201878B1 (fr) 2013-06-05

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Family Applications (1)

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EP20090178063 Active EP2201878B1 (fr) 2008-12-19 2009-12-04 Aspirateur doté d'un séparateur de force centrifuge

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EP (1) EP2201878B1 (fr)
DE (1) DE102008055047A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102485153B (zh) * 2010-12-03 2016-03-02 乐金电子(天津)电器有限公司 具有异型进气道的吸尘器
DE102019206570A1 (de) * 2019-05-08 2020-11-12 Robert Bosch Gmbh Sauggerät

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2038045C3 (de) * 1970-07-31 1981-12-10 Siemens AG, 1000 Berlin und 8000 München Zyklon
NL177187C (nl) * 1974-01-16 1985-08-16 Nederlandse Gasunie Nv Inrichting voor het afscheiden van verontreinigingen uit gassen.
KR20010001213A (ko) 1999-06-02 2001-01-05 구자홍 싸이클론 집진장치
KR100607440B1 (ko) * 2004-09-13 2006-08-02 삼성광주전자 주식회사 사이클론 집진장치 및 이를 구비한 진공 청소기
DE102005056922A1 (de) 2005-11-29 2007-05-31 BSH Bosch und Siemens Hausgeräte GmbH Staubsauger mit Fliehkraftabscheider
US20070209334A1 (en) * 2006-03-10 2007-09-13 Gbd Corp. Vacuum cleaner with a removable screen

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Publication number Publication date
DE102008055047A1 (de) 2010-06-24
EP2201878A2 (fr) 2010-06-30
EP2201878A3 (fr) 2011-09-07

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