EP2119387A1 - Zyklon-Staubsammelvorrichtung und Staubsauger - Google Patents

Zyklon-Staubsammelvorrichtung und Staubsauger Download PDF

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Publication number
EP2119387A1
EP2119387A1 EP08103715A EP08103715A EP2119387A1 EP 2119387 A1 EP2119387 A1 EP 2119387A1 EP 08103715 A EP08103715 A EP 08103715A EP 08103715 A EP08103715 A EP 08103715A EP 2119387 A1 EP2119387 A1 EP 2119387A1
Authority
EP
European Patent Office
Prior art keywords
cyclone
downstream
vacuum cleaner
dust
cyclones
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.)
Withdrawn
Application number
EP08103715A
Other languages
English (en)
French (fr)
Inventor
Jing Liang Pan
Bob Deng
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.)
Suzhou Clean Bloom Electric Co Ltd
Original Assignee
Suzhou Clean Bloom Electric Co Ltd
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
Application filed by Suzhou Clean Bloom Electric Co Ltd filed Critical Suzhou Clean Bloom Electric Co Ltd
Priority to EP08103715A priority Critical patent/EP2119387A1/de
Publication of EP2119387A1 publication Critical patent/EP2119387A1/de
Withdrawn legal-status Critical Current

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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
    • A47L9/1616—Multiple arrangement thereof
    • A47L9/1625—Multiple arrangement thereof for series flow
    • 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
    • A47L9/1616—Multiple arrangement thereof
    • A47L9/1625—Multiple arrangement thereof for series flow
    • A47L9/1633—Concentric cyclones
    • 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
    • A47L9/1616—Multiple arrangement thereof
    • A47L9/1641—Multiple arrangement thereof for parallel flow
    • 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
    • B04C5/24—Multiple arrangement thereof
    • B04C5/26—Multiple arrangement thereof for series flow
    • 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
    • B04C5/24—Multiple arrangement thereof
    • B04C5/28—Multiple arrangement thereof for parallel flow

Definitions

  • Particles such as dirt and dust particles
  • a cyclonic separator can be separated from a fluid flow using a cyclonic separator.
  • Cyclonic separators have been used in vacuum cleaners, for example, to separate dirt and dust from an air flow.
  • Such separators can comprise relatively low efficiency cyclones for separating large particles from an air flow and higher efficiency cyclones for separating finer particles in the air flow.
  • Such cyclonic separators have been arranged in vacuum cleaners in series, with an upstream cyclonic separator being combined with smaller downstream cyclonic separators arranged in parallel with one another. An arrangement of this type is shown and described in U.S. Patent No. 3,425,192 to Davis .
  • a first aspect of the present invention provides a dust collecting apparatus, for a vacuum cleaner, comprising:
  • the dust collecting apparatus can separate particles, such as dirt and other particulates, from an air flow.
  • the upstream cyclone is for removing larger particles from the air flow.
  • the downstream cyclones are for removing smaller particles.
  • the second cyclones being arranged both in parallel and in tandem with one another results in a more compact cyclonic dust collecting apparatus having enhanced suction and dust collecting efficiency.
  • the upstream cyclone is preferably cylindrical, and the downstream cyclones each preferably comprise a cylindrical upper portion and a frusto-conical downstream portion.
  • the outlet of the upstream cyclone can further be provided with a grill in order to provide better particle separation.
  • the present apparatus can comprise a cylindrical housing for containing both the upstream cyclone and the downstream cyclones.
  • the upstream cyclone is positioned below the downstream cyclone, and the outlet or outlets of the upstream cyclone are in fluid communication with a dust collecting chamber above the upstream cyclone.
  • the downstream cyclones can be positioned such that at least a lower portion of such cyclones project through the upper end of the housing and are contained within the dust collecting chamber.
  • the cone openings of the downstream cyclones in this embodiment are preferably arranged at approximately the same vertical height, and the outlet of the upstream cyclone is preferably positioned above the cone openings.
  • first and second downstream cyclones are positioned within the upstream cyclone.
  • at least a lower portion of each of the first and second downstream cyclones is positioned in an interior portion of the upstream cyclone, in order to provide a compact arrangement.
  • the downstream cyclones can be fully contained within the upstream cyclone in this embodiment.
  • the present apparatus is preferably contained in a vacuum cleaner.
  • the vacuum cleaner comprises two tanks, with the upstream cyclone contained in one tank and the downstream cyclones contained in the other tank.
  • the vacuum cleaner can be, for example, a canister-type vacuum cleaner, an upright vacuum cleaner, or a stick vacuum cleaner.
  • the base of each of the tanks is preferably removable to allow dust removal, although a door can alternatively be provided in the tanks for this purpose.
  • the invention provides a vacuum cleaner comprising:
  • Vortex separator i.e. a component of the present apparatus in which a rotating fluid flow is established to separate dust and other components of a fluid stream entering the cyclone.
  • Downward and downwardly mean in the direction of or toward a support surface on which the present apparatus is or can be positioned.
  • Upward and upwardly mean in the opposite direction, i.e. away from such a support surface.
  • Above refers to a position which is located upwardly with respect to a referenced component, object, or position, while “below” refers to a position which is located downwardly with respect to a referenced component, object, or position.
  • Dust refers to the solid material entrained in an air flow entering the present dust collecting apparatus, such as dirt, fiber, hair, and minute solid particles, such as particles having diameters less than 500 micrometers.
  • “Horizontal” refers to an orientation approximately parallel to (i.e., not substantially extending toward or away from) a support surface on which the present apparatus is supported when in use.
  • Porate means a solid particle, such as a particle of dust or dirt.
  • Particulates are generally suspended in air when entering the present dust collecting apparatus, and also generally have a density greater than that of air.
  • Vacuum cleaner refers to a device for removing dust and other materials by suction. Vacuum cleaners are generally portable, i.e. are designed to be moved to a location in need of dust removal, for example, and typically are designed to operate over a relatively flat surface such as a floor or a floor covering such as a rug or carpet.
  • “Vertical” refers to an orientation extending toward or away from a support surface on which the present apparatus is supported, preferably at an angle of about 90° with respect to the support surface.
  • cyclonic vacuum cleaners which are currently on the market generally incorporate a HEPA filter.
  • HEPA filters are effective in removing small particulate matter from an air stream so that the air which exits a vacuum cleaner is essentially filtered.
  • One disadvantage of using HEPA filters is that they provide substantial resistance to the flow of air through a vacuum cleaner.
  • the present dust collecting apparatus reduces or eliminates the need for a HEPA filter by providing improved particle separation in a compact arrangement, thereby providing vacuum cleaners which employ the present dust collecting apparatus with improved pressure drop and greater energy efficiency compared to cleaners that include HEPA filters.
  • particles are separated from an airflow with an upstream cyclonic separator and one or more downstream cyclonic separators, the downstream cyclones preferably comprising a plurality of cyclones that are arranged in tandem and in parallel with one another.
  • a first set of two downstream cyclonic separators operate in tandem to separate particulates from a common air stream, while one or more other sets of downstream cyclonic separators operate in parallel to the first set to separate particulates from other air streams.
  • Such an arrangement can achieve a high separation efficiency while also allowing a compact combination of the upstream and downstream cyclonic separators so that the present apparatus can be used in a domestic vacuum cleaner.
  • the cyclones used in the present apparatus typically comprise a container which is cylindrical, frusto-conical, or both, within which a rotational airflow is established in order to separate heavier components of the airflow, such as dust, from the stream of air.
  • the fluid is air and the particles are dirt and dust, such as will be found in a domestic environment. It will be understood, however, that in some embodiments liquids can also be effectively collected with the present apparatus 10, such as in wet/dry vacuuming applications in which either solids, liquids, or both are collected with the present apparatus 10.
  • the present dust collecting apparatus 10 comprises an upstream cyclone 27 and a plurality of downstream cyclones 31.
  • the upstream cyclone has an upper end 24, a base 25, and a side wall 28 which extends between the upper end 24 and the base 25.
  • the side wall 28 can be cylindrical, as in the embodiment of Figure 1 , or can also be frusto-conical or comprise a frusto-conical portion.
  • side wall 28 comprises an upper cylindrical portion 29 and a lower frusto-conical portion 30, so that the upstream cyclone 27 tapers as the side wall 28 descends from the upper end 24 toward the base 25.
  • a tangential inlet 26 is provided in the side wall 27 of the upstream cyclone 27 adjacent the upper end 24.
  • the tangential inlet 26 is capable of delivering a particle-laden fluid to the interior of the upstream cyclone 27 in a direction which is tangential to the side wall 28 so as to set up a swirling, preferably helical flow in the interior of the upstream cyclone 27.
  • the upstream cyclone 27 has an outlet 23 which can be located centrally inside and/or outside of the upper end 24 and which communicates with the interior of the upstream cyclone 27.
  • the outlet 23 can comprise a conduit 12 having a peripheral grill 11 inside the upper end 24 of the upstream cyclone 27, as shown in Figures 3A and 4A .
  • Grills such as those disclosed in U.S. Patent No. 6,702,868 , can serve to exclude larger particulates and further assist in removing such particulates from the airflow entering the outlet 23 of the upstream cyclone 27.
  • the outlet 23 can comprise a generally cylindrical conduit 12 having an inlet in communication with the upper end 24 of the upstream cyclone 27 and an outlet 14 which communicates with the downstream cyclones 31.
  • the conduit 12 extends vertically upwardly from the upper end 24 of the upstream cyclone 27 and is covered with a cover 15 having openings which exclude larger particulates, thereby assisting in the filtration of air passing into the downstream cyclones 31.
  • the conduit outlet 14 in this embodiment communicates with the downstream cyclones via a dust collecting chamber 16, with the outlet 14 being located above the lower end 33 of the downstream cyclones 31 in the dust collecting chamber 16.
  • the upstream cyclone 27 and the dust collecting chamber 16 are both contained by a cylindrical housing 18 within which both components are arranged.
  • the present apparatus 10 can be made more compact.
  • FIG. 2 An alternative compact arrangement of the upstream and downstream cyclones is shown in Figure 2 .
  • the side wall 28 of the upstream cyclone 27 is positioned around and thereby contains at least a portion of each of the downstream cyclones 31.
  • An inner side wall 22 is positioned between the side wall 28 and a lower portion of the downstream cyclones 31, thereby separating the more particulate-laden portion of the fluid flow within the upstream cyclone 27 from the downstream cyclones 31.
  • the inner side wall 22 extends downwardly from a point above the cone openings 34 of the frusto-conical cyclone portions 39 of the downstream cyclones 31 toward the base 25 of the upstream cyclone 27, preferably extending below the lower end 33 of the downstream cyclones 31.
  • the inner side wall 22 also thereby helps to funnel dust exiting the cone openings 34 of the downstream cyclones 31 to a lower end of the apparatus 10.
  • This embodiment of the present apparatus allows dust collected from both the upstream cyclone 27 and the downstream cyclones 31 to be accumulated in a common area at or adjacent to the base 25, thereby facilitating dust removal.
  • a grill (not shown) can, in an alternative embodiment, be included in Apparatus as claimed in Figure 2 between the top of the inner side wall 22 and the upper end 24 in order to further assist in particle separation.
  • an inlet conduit 36 in fluid communication with the outlet 23 of the upstream cyclone 27 communicates with one or more downstream cyclones 31.
  • a plurality of inlet conduits 36 to such downstream cyclones 31 are preferably dimensioned and arranged to receive substantially equal portions of the fluid flow from the upstream cyclone 27, so as to divide the flow of air from the outlet 23 which enters each of the downstream cyclones 31 into approximately equal volumes.
  • fluid flow from the upstream cyclone 27 is directed to the downstream cyclones via an inlet 9 comprising a generally cylindrical pipe or peripheral grill that extends vertically upwardly from within the dust collecting chamber 16, though a direct connection between the outlet 23 and inlet 9 is also possible.
  • the inlet 9 receives a flow of air exiting the upstream cyclone 27 and divides it between several joined conduits, each of which is dimensioned and arranged so as to receive a substantially equal part of any fluid flow received from the upstream cyclone 27 and to deliver such fluid portion to a downstream cyclone inlet 36.
  • Each downstream cyclone 31 in the present apparatus 10 is in communication with an inlet conduit 36.
  • the downstream cyclones 31 preferably have an upper cylindrical portion 39 with which the respective inlet conduit 36 communicates in a tangential manner and a frusto-conical cyclone portion 37 which descends from the upper cylindrical portion 39.
  • the frusto-conical cyclone portion 37 has a cone opening 34.
  • the downstream cyclones 31, preferably including both upper cylindrical portions 39 and frusto-conical cyclone portions 37 are preferably arranged vertically around a longitudinal axis in a symmetrical manner.
  • the cone openings 34 are also preferably arranged close to one another at approximately the same vertical height.
  • each of the downstream cyclones 31 passes through the upper end of the cylindrical housing, which can include apertures sized to receive the downstream cyclones 31.
  • Each of the downstream cyclones 31 is fixed to the rim of the respective aperture in a manner which maintains a seal therebetween.
  • a portion of the upper cylindrical portion 39 of a downstream cyclone 31 is preferably positioned in the apertures.
  • downstream cyclones 31 project into the interior of the upstream cyclone 27. Positioning at least a lower portion of the downstream cyclones 31 in an interior portion of the upstream cyclone 27 provides for greater compactness. This arrangement is thus suitable for use in an application where dimensions are to be kept as small as possible. An example of such an application is a domestic vacuum cleaner in which consideration of size and weight are of considerable importance.
  • the downstream cyclones 31 can be arranged on the outside of the upstream cyclonic separator, for example if it is desired to contain other components of a vacuum cleaner in the interior portion of the upstream cyclone 27.
  • each group of downstream cyclones 31 comprises a pair of cyclones 42, 44 arranged in tandem with each other.
  • the flow of air received from the upstream cyclone 27 first enters into the first paired cyclone 42 and is subjected to cyclonic separation, after which the relatively cleaned airflow flows into the second paired cyclone 44.
  • the flow of air (shown by arrows and dotted lines) enters the first paired cyclone 42 through the inlet conduit 36, and after swirling down through the first paired cyclone 42 is drawn through a joining conduit and into the inlet 45 of the second paired cyclone 44, where it is subjected to a further cyclonic separation.
  • a stream of dirty air entering a vacuum cleaner comprising this embodiment of the present apparatus 10 will have passed through a cyclone three times, i.e. through three different cyclones (e.g., cyclones 27, 42, and 44), before reaching the downstream cyclone outlet or outlets.
  • cyclones e.g., cyclones 27, 42, and 44
  • the first paired cyclone 42 is preferably arranged adjacent to the second paired cyclone 44 and is aligned along a common longitudinal axis, in order to form a compact design.
  • a plurality of such first and second paired cyclones are preferably positioned adjacent to each other and are aligned around a common longitudinal axis, preferably an axis passing through a central portion of the apparatus 10 and more preferably through the horizontal center of the apparatus 10 (e.g., the axis defined by the combined outlet 41).
  • the plurality of first and second paired cyclones are also preferably positioned such that their cone openings 34 are aligned along a common horizontal axis, i.e. are approximately the same vertical distance from the base 25 and/or from a support surface on which the apparatus 10 is supported, facilitating the collection of dust and allowing for a compact design.
  • Each of the second paired cyclones 44 has an outlet conduit 38 which is preferably located centrally in the upper portion of the second paired cyclone 44.
  • the outlet conduits 38 preferably meet at a junction 40 to form a combined outlet 41, so that air entering the apparatus 10 via the tangential inlet 26 finally leaves the apparatus via the combined outlet 41.
  • each of the second downstream cyclones 48 is similarly provided with an outlet conduit 38.
  • the apparatus 10 comprises a cyclonic separator having an upstream cyclone 27 in a first dust tank 51 and one or more downstream cyclones 31 in a second dust tank 52.
  • first dust tank 51 relatively large particles 53 entrained within the incoming fluid flow are deposited in the lower portion of the dust tank 51.
  • the outlet conduit 23 of the upstream cyclone 27 can be located in the lid of dual barrel of a cylinder vacuum cleaner, for example.
  • One or more downstream cyclones 31 are located in the second dust tank 52.
  • Each of the downstream cyclones 31 has a tangential inlet opening connected with the inlet conduit 36.
  • the downstream cyclones 31 can be arranged in the second dust tank 52 as described above, and the finer dust particles 54 can be deposited into the lower portion of the second dust tank 52.
  • a single downstream cyclone 31 can be used, although it is preferred that a plurality of downstream cyclones 31 be used, as shown in Figures 1 , 2 , and 4 .
  • a first, preferably cylindrical downstream cyclone 47 receives a fluid flow from the upstream cyclone 27, and after undergoing cyclonic separation of particles in the first downstream cyclone the fluid flow is distributed to a plurality of second, preferably frusto-conical downstream cyclones 48 positioned within the cylindrical cyclone 47, as in the embodiment of Figure 2 .
  • Each of the first and second dust tanks comprises a base 55, a top 57, and one or more sidewalls 58, and the two dust tanks are preferably arranged adjacent to each other (side by side) in a vacuum cleaner.
  • Figure 5 illustrates an embodiment in which two dust tanks are provided in this way in an upright vacuum cleaner, i.e. a vacuum cleaner having a cleaning head onto which a handle and dust collection bag or chamber are attached.
  • the two tanks each preferably have a separate top, base and sidewall, with the base preferably being removable to allow for dust removal.
  • a common base can be used for the two dust tanks to facilitate the removal of dust from both tanks.
  • a fluid flow in which particles are entrained enters the present apparatus 10 via the tangential inlet 26.
  • the orientation of the tangential inlet 26 cause the fluid flow to follow a helical path within the upstream cyclone 27 so that the fluid flow travels downwardly towards the base 25.
  • Relatively large particles 53 entrained within the incoming fluid flow are deposit in the lower portion of the interior of the upstream cyclone 27 adjacent the base 25.
  • the fluid flow, in which smaller particles remain entrained then moves inwardly and upwardly towards the upper end 24 of the upstream cyclone 27.
  • the fluid flow exits the upstream cyclone 27 via the outlet 23 along which the fluid flow travels until it reaches the one or more downstream cyclones 31.
  • the fluid flow is then divided into separate fluid flows, for example into five separate fluid flows in the embodiment of Figure 4 .
  • each portion of the fluid flow reaches the upper cylindrical portion 39 of a downstream cyclone 31, such as a respective first paired cyclone 42, it again follows a helical path therein in view of the tangential orientation of the inlet conduit 36.
  • the separated fine particles 54 are deposited below the cone openings 34 of the downstream cyclones 31, for example in the second dust tank 52 in the embodiments of Figures 3 and 4 , while the remainder of the fluid leaves the final downstream cyclone 31.
  • the separate fluid flows from each downstream cyclone 31 or set of paired cyclones 42, 44 are combined at the junction 40 and leave the apparatus via the combined outlet 41.
  • the present dust collecting apparatus can be included in a variety of different vacuum cleaners known to the art.
  • the present dust collecting apparatus comprises two dust tanks, as in the embodiments of Figures 3 and 4 , and is included in an upright vacuum cleaner 100.
  • the upright vacuum cleaner 100 illustrated in Figure 5 comprises an articulating cleaner head 110 which can articulate from an upright resting position to an operating position in which the handle 120 is lowered with respect to the resting position of the handle 120 by means of a control lever 112.
  • the cleaner head 100 includes an opening for receiving a dust-laden airflow, which travels through a conduit such as the flexible conduit 130 having an outlet in communication with the inlet 26 of the upstream cyclone 27 of the present dust collecting apparatus 10.
  • the upright vacuum cleaner 100 also preferably includes wheels 140 on either lateral side of the cleaner head 110 to facilitate movement of the vacuum cleaner 100 across a surface, as well as other components typically included in upright vacuum cleaners such as electrical cord hooks 104 and a hook 106 for the flexible conduit 130.
  • the present dust collecting apparatus can also be used in other types of vacuum cleaners known to the art, such as stick vacuum cleaners, which operate via a handle like upright vacuum cleaners but do not have a cleaner head that articulates.
  • the present dust collecting apparatus can also be used in a canister-type vacuum cleaner, in which the cleaner head generally comprises a rigid wand and is connected to the dust collecting apparatus and other powered components of the vacuum cleaner via a flexible hose or other conduit.
  • the present dust collecting apparatus can be incorporated into a stationary vacuum cleaner system and connected to one or more locations via fixed conduits.
  • the apparatus 10 will require periodic emptying of separated particles, i.e. dust.
  • One way to accomplish this can be to arrange for the base 25 to be made removable from (i.e., reversibly secured to) the side wall 28 for emptying purposes.
  • a door can be provided in sidewall 28 in order to access dust collected in the apparatus 10, such as in the dust collecting chamber 16 and/or in the upstream cyclone 27 in the embodiment of Figure 1 .
EP08103715A 2008-04-24 2008-04-24 Zyklon-Staubsammelvorrichtung und Staubsauger Withdrawn EP2119387A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08103715A EP2119387A1 (de) 2008-04-24 2008-04-24 Zyklon-Staubsammelvorrichtung und Staubsauger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08103715A EP2119387A1 (de) 2008-04-24 2008-04-24 Zyklon-Staubsammelvorrichtung und Staubsauger

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EP2119387A1 true EP2119387A1 (de) 2009-11-18

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011037519A1 (en) * 2009-09-22 2011-03-31 Skellefteå Kraftaktiebolag Drying apparatus and process for drying bulk material and use of said drying apparatus to dry bulk material.

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3425192A (en) 1966-12-12 1969-02-04 Mitchell Co John E Vacuum cleaning system
DE10132690A1 (de) * 2000-12-27 2002-07-18 Ni Zu Gen Jiangsu Fliehkraftstaubabscheidevorrichtung für Staubsauger
US20050252179A1 (en) 2004-05-14 2005-11-17 Jang-Keun Oh Multi cyclone vessel dust collecting apparatus for vacuum cleaner
EP1676516A1 (de) 2004-12-29 2006-07-05 LG Electronics Inc. System zum Auffangen von Staub und Staubsauger mit demselben
EP1690487A1 (de) * 2005-02-15 2006-08-16 Vax Limited Zyklonstaubabscheider und Staubsammler für einen Staubsauger
US20060230724A1 (en) 2005-03-29 2006-10-19 Samsung Gwangju Electronics Co., Ltd. Cyclone dust separating apparatus for vacuum cleaner and vacuum cleaner having the same
EP1733672A2 (de) 2005-06-14 2006-12-20 Samsung Gwangju Electronics Co., Ltd. Staubsammelvorrichtung mit mehreren Zyklonen
EP1779761A2 (de) 2005-10-28 2007-05-02 Samsung Gwangju Electronics Co, Ltd. Staubsammelvorrichtung mit mehreren Zyklonen
WO2008034325A1 (fr) 2006-09-21 2008-03-27 Suzhou Kingclean Floorcare Co., Ltd. Dispositif de dépoussiérage

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3425192A (en) 1966-12-12 1969-02-04 Mitchell Co John E Vacuum cleaning system
DE10132690A1 (de) * 2000-12-27 2002-07-18 Ni Zu Gen Jiangsu Fliehkraftstaubabscheidevorrichtung für Staubsauger
US20050252179A1 (en) 2004-05-14 2005-11-17 Jang-Keun Oh Multi cyclone vessel dust collecting apparatus for vacuum cleaner
EP1676516A1 (de) 2004-12-29 2006-07-05 LG Electronics Inc. System zum Auffangen von Staub und Staubsauger mit demselben
EP1690487A1 (de) * 2005-02-15 2006-08-16 Vax Limited Zyklonstaubabscheider und Staubsammler für einen Staubsauger
US20060230724A1 (en) 2005-03-29 2006-10-19 Samsung Gwangju Electronics Co., Ltd. Cyclone dust separating apparatus for vacuum cleaner and vacuum cleaner having the same
EP1733672A2 (de) 2005-06-14 2006-12-20 Samsung Gwangju Electronics Co., Ltd. Staubsammelvorrichtung mit mehreren Zyklonen
EP1779761A2 (de) 2005-10-28 2007-05-02 Samsung Gwangju Electronics Co, Ltd. Staubsammelvorrichtung mit mehreren Zyklonen
WO2008034325A1 (fr) 2006-09-21 2008-03-27 Suzhou Kingclean Floorcare Co., Ltd. Dispositif de dépoussiérage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011037519A1 (en) * 2009-09-22 2011-03-31 Skellefteå Kraftaktiebolag Drying apparatus and process for drying bulk material and use of said drying apparatus to dry bulk material.

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