EP2066214B1 - Poche de filtre à poussière construite en plusieurs couches - Google Patents

Poche de filtre à poussière construite en plusieurs couches Download PDF

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Publication number
EP2066214B1
EP2066214B1 EP07820912A EP07820912A EP2066214B1 EP 2066214 B1 EP2066214 B1 EP 2066214B1 EP 07820912 A EP07820912 A EP 07820912A EP 07820912 A EP07820912 A EP 07820912A EP 2066214 B1 EP2066214 B1 EP 2066214B1
Authority
EP
European Patent Office
Prior art keywords
filter
layer
dust
filter layer
filter bag
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 - Fee Related
Application number
EP07820912A
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German (de)
English (en)
Other versions
EP2066214A2 (fr
Inventor
Heike Poch
Beate Salice
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
Application filed by Vorwerk and Co Interholding GmbH filed Critical Vorwerk and Co Interholding GmbH
Publication of EP2066214A2 publication Critical patent/EP2066214A2/fr
Application granted granted Critical
Publication of EP2066214B1 publication Critical patent/EP2066214B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • A47L9/14—Bags or the like; Rigid filtering receptacles; Attachment of, or closures for, bags or receptacles

Definitions

  • the invention relates to a multi-layer constructed dust filter bag for a vacuum cleaner with at least one prefilter layer having an air permeability of more than 800 l / m 2 s and at least one downstream of the pre-filter layer arranged in the flow direction fine filter layer having an air permeability of 8000 l / m 2 s or has less.
  • Dust filter bag of the type in question are in the usual way of special filter paper and / or various textile fabrics (nonwovens), z.
  • spunbonded, meltblown, Stapelmaschinevlies etc. mostly multi-layered.
  • the aim of the combinations of several layers of different filter media is to achieve a high dust-holding capacity coupled with good filter efficiency, in particular with regard to fine dust.
  • This task is usefully solved by the fact that the raw gas side of the filter assembly by media layers (spunbond, felt, Thermobond) is formed with higher air permeability and lower separation efficiency to initially deposit coarser particles. In the flow direction behind it then usually follow media layers with lower air permeability and higher separation efficiency for fine dust separation (meltblown).
  • These individual filter layers are often supplemented by a usually external media layer, which is characterized by a high mechanical stability (tear resistance) and provides a support and protection function for the more sensitive inner layers.
  • the filter efficiency of such a media layer is usually low, while the air permeability is desirably high.
  • As a material for these carrier layers are usually paper or spunbond use.
  • the individual layers are usually connected to one another in the edge region by welding seams, for example by ultrasonic welding.
  • Alternative embodiments provide that the layers within the filter surfaces are interconnected by lamination or by distributed in the area welds.
  • the filter layers of the known dust filter bags have different pore sizes and porosity. From the raw gas side towards the downstream side, these pores are getting smaller and smaller. This structure has the function of depositing most of the large particles on the first filter layers and preventing their penetration into the deeper, finer layers. Due to the variable pore sizes, the filter layers have a depth filtration. In the course of suction pores clog. The high porosity makes it easier for the dust particles to build up a dust cake that can firmly adhere to the vertical walls of the inner filter bag layers. The consequences are increasing particulate matter filtration based on surface filtration, which is supported by the persistent dust cake, and an increasing pressure loss of the dust filter bag, which results in decreasing suction power.
  • a dust filter bag according to the preamble of the independent claim is known from DE 20 2005 010 357 U already known.
  • the subject matter of claim 1 is solved, first and foremost, by the subject matter of claim 1, with the aim being that, starting from and connected to the prefilter layer, free-end, fibrous separator elements are provided extending transversely to the surface extension of the prefilter layer. It is accordingly created a dust filter bag, in which filter efficiency and dust storage capacity are equally well met.
  • the prefilter layer has both coarse and fine filter properties, this with a further high air permeability.
  • the separation elements are part of the pre-filter layer.
  • the fibrous separation elements extending transversely to the surface extension of the prefilter layer represent a kind of cilia surface, wherein the free length of these separation elements is chosen as a function of the selected fibrous material so that they are at least in the operating position of the vacuum cleaner, d. H. in filter operation, in which even by bending it to a certain superimposition, for example, in scaly form, can nevertheless still the desired air permeability is given.
  • the length can also be chosen so small, this combined with a corresponding stiffness, for example in the range of 0.5 to 1.5 mm, preferably 1 mm, that there is practically no bending.
  • the separation elements prefiltration of fine dust.
  • a thin and flexible filter bag construction is further achieved by the selected embodiment, which further allows the known connection of the individual media layers such as ultrasonic welding along the edges.
  • the separation elements may also have different lengths in terms of length. In addition to the previously mentioned lengths of 0.5 to 1.5 mm, they can also have up to 5, 10 and more millimeters in length.
  • the separation elements may be provided on one side transversely projecting to the surface extension of the prefilter layer, so in particular on the inflow side, d. H. on the surface of the pre-filter layer facing away from the fine filter layer, according to which the total amount of fine dust flowing through the one pre-filter representing a coarse filter is measurably reduced.
  • the prefilter is less added by the passing through the fine dust during the service life.
  • the separation elements can also be provided downstream of the prefilter layer, likewise here preferably projecting transversely to the surface extension of the prefilter layer; beyond that also on both sides, d. H. both upstream and downstream of the pre-filter layer.
  • the surface structure of the pre-filter layer is changed to form the transverse to the surface extension extending, free-standing ending and fibrous separation elements.
  • This change can be achieved by some sort of velorization of the prefilter material, at which velorization a roughening of the prefilter base material is performed.
  • velorization a roughening of the prefilter base material is performed.
  • a brush arrangement fiber parts discharged from the base material for the pre-filter for example, in this case by means of special needles or further, for example by means of a brush arrangement fiber parts discharged from the base material for the pre-filter.
  • loop structures can also be outstanding, for example corresponding to a terry toweling fabric.
  • separate separation elements for example in the form of tufts or loose fibers, can be connected to the surface of the prefilter layer by full-surface or partial flocking or gluing.
  • the flocking takes place preferably by an adhesive bond.
  • This can be achieved, for example, by thermoplastic fibers contained in the relevant filter material, which are heated to the corresponding adhesive temperature, for example by hot air.
  • the separation elements can also be introduced analogously to the tufting method known for carpet production.
  • the actual arrest if still necessary, if not about the separation elements due to their structure (hook structure) are self-adhesive, also by adhesive, such as the said thermoplastic fibers, which are heated accordingly, be made.
  • each prefilter layer consists of a sheet-like layer of spunbond or thermobond material, wherein coarser fibers with a relatively large pore volume are used.
  • These prefilter sheets have an air permeability between 800 and 16700 l / m 2 s and grammage values filling a range of 5 to 100 g / m 2 .
  • all chemical fibers based on polyolefins, polyesters, polyamides, polyacrylonitrile and / or polyvinyl alcohol are also suitable for the prefilter layer.
  • cellulosic fibers such as viscose.
  • the media for fine or secondary filtration so the fine filter layer of finer fibers, so preferably made of meltblown fibers. These have a lower pore volume than the fibers for the prefilter layer.
  • the air permeability is in this case in a range of 30 to 8000 l / m 2 s, with a flat tire of 5 to 200 g / m 2 .
  • the prefilter layer including the deposition elements, is charged electrostatically.
  • the fine filter layer can be charged electrostatically.
  • a vacuum cleaner 1 in particular household vacuum cleaner, which is designed as a hand-held handle device.
  • This first comprises a base unit 2, with an electric motor, not shown, for a suction / blower unit.
  • a base unit 2 On the base unit 2 is a for receiving the sucked up dust provided filter cassette 3 docked.
  • the base unit 2 has a gooseneck-shaped extension, which extends over the region of the filter cartridge 3. In the region of the free end, this extension forms a plug-in receptacle for a handle 7 of the vacuum cleaner 1. In the region of the free end of the stem 7, an actuating handle 8 is formed. This has a thumb-actuatable actuator in the form of a slide switch, via which the power of the electric motor accommodated in the base unit 2 is adjustable.
  • the base unit 2 is fluidly connected to a header 9. This may be a suction nozzle having a rotating brush.
  • the suction mouth, not shown, of the attachment 9 is fluidly connected to the dust filter bag 4 accommodated in the filter cassette 3, for which purpose a flow channel, not shown, passes through the base unit 2. At the end, this flow channel merges into a connection section 10.
  • the filter bag 4 When not in operation, ie in non-Saugluftbeetzschlagung the filter bag 4, the passage opening 13 of the holding plate 12 bag inside facing covered by a check valve 15. This is on the underside of the support plate 12, for example, hinged. The displacement of the check valve 15 in the opening direction is effected by the Saugluftbeaufschlagung. The provision in the closed position according to Fig. 3 takes place in a preferred manner spring assisted. As a result of this embodiment, the illustrated dust filter bag 4 is operable in overhead position. The switching off of the suction air flow on the floor formed by the holding plate 12 lowering dirt and dust particles can not pass through the passage opening 13 back into the flow channel according to this embodiment.
  • the bag 14 consists in the illustrated embodiment substantially of two superimposed in the thickness direction layers, so from the inside of the bag facing first Vorfilterlage 16 and a bag outer full surface the Vorfilterlage 16 covering fine filter layer 17.
  • the Vorfilterlage consists of at least one sheet structure layer (Spunbond or Thermobond) while the fine filter layer 17 is formed of an electrostatically charged meltblown layer. These two layers are firmly connected in places, so for example. About ultrasonic welding points.
  • the so-formed two-ply bag is peripherally attached along the free edge on the underside of the support plate 12, so for example. Glued or welded with this.
  • the pre-filter layer 16 or coarse filter layer is composed of coarser fibers and has a relatively large pore volume. So owns this location an air permeability of, for example, 10,000 l / m 2 s and a grammatical value of, for example, 50 g / m 2 .
  • the fine or Nachfiltrationslage consists of finer fibers and has a correspondingly lower pore volume, the air permeability of this downstream layer, for example, 4.000 l / m 2 s, this with a surface measure of, for example, 100g / m 2 .
  • the surface of the prefilter layer 16, which faces the inside of the bag is provided with separation elements 19 in the direction of flow. These extend transversely to the surface extension of the prefilter layer 16 starting from this, wherein further the separation elements 19 are rooted in the prefilter layer 16, that is connected to this. Shown is a prefilter layer 16, in which the separation elements 19 are fibrous, free end projecting out of the prefilter layer 16, so for example by machining the corresponding surface of the prefilter layer 16 with needles or brush-like tools. As a result, a kind of velorization of the prefilter layer surface is achieved.
  • the upstream surface of the pre-filter layer 16 is increased, which provides a prefiltration of fine dust. This continues at a known for pre-filter high air flow. Due to the substantially aligned perpendicular to the surface of the prefilter 16 fibrous Abborgieri 19 arise in the depth direction, ie in the air flow direction in the region of the formed by the Abscheideimplantation 19 zone 18 no or no significant density or pore size changes.
  • the zone 18 may also be formed by separation elements 19, which are applied in the form, for example, of loose fibers or fiber tufts over the entire surface or partially by flocking and / or gluing onto the assigned pre-filter surface.
  • the prefilter layer 16 may be electrostatically charged together with the separation elements 19, which further supports the fine filtration.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)
  • Filtering Materials (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

L'invention concerne une poche de filtre à poussière (4) construite en plusieurs couches comprenant au moins une couche de préfiltre (16), qui présente une perméabilité à l'air supérieure à 800 l/m2s et au moins une couche de filtration fine (17) agencée dans le sens du courant derrière la couche de préfiltre (16), qui présente une perméabilité à l'air de 8000 l/m2s ou moins. Pour améliorer une poche de filtre à poussière du type en question du point de vue de l'efficacité des filtres et de la capacité à stocker la poussière par une construction de poche la plus simple possible, on recommande que des éléments de séparation fibreux (19) s'étendant perpendiculairement à l'extension de surface de la couche de préfiltre et se terminant par un collier libre soient prévus à partir de, et reliés avec, la couche de préfiltre (16).

Claims (9)

  1. Sac filtrant anti-poussière (4) à plusieurs couches avec au moins une couche de pré-filtrage (16), qui présente une perméabilité à l'air supérieure à 800 l/m2s, et au moins une couche de filtrage fin (17) agencée dans le sens d'écoulement derrière la couche de pré-filtrage (16), qui présente une perméabilité à l'air de 8000 l/m2s ou moins, caractérisé en ce que, à partir de la couche de pré-filtrage (16) présentant un volume de pores supérieur à celui de la couche de filtrage fin et en liaison avec cette couche de pré-filtrage, il est prévu des éléments de séparation fibreux (19) s'étendant transversalement à l'extension de surface de la couche de pré-filtrage et se terminant en porte-à-faux, formant une surface de cils vibratiles, de sorte que, dans le cas d'une perméabilité à l'air élevée encore donnée, la couche de pré-filtrage présente autant des propriétés de filtrage grossier que des propriétés de filtrage fin.
  2. Sac filtrant anti-poussière selon la revendication 1, caractérisé en ce que les éléments de séparation (19) sont prévus d' un côté et/ou des deux côtés en s'écartant transversalement de l'extension de surface de la couche de pré-filtrage (16).
  3. Sac filtrant anti-poussière selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que les éléments de séparation (19) sont produits par veloutage du matériau de pré-filtrage.
  4. Sac filtrant anti-poussière selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que les éléments de séparation (19) sont appliqués par flocage.
  5. Sac filtrant anti-poussière selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que les éléments de séparation (19) sont appliqués par collage.
  6. Sac filtrant anti-poussière selon l'une quelconque des revendications 1 à 5, caractérisé en ce que la couche de pré-filtrage (16) est constituée d'un matériau lié par filage ou à la chaleur.
  7. Sac filtrant anti-poussière selon l'une quelconque des revendications 1 à 6, caractérisé en ce que la couche de pré-filtrage (16), y compris les éléments de séparation (19), est chargée électrostatiquement.
  8. Sac filtrant anti-poussière selon l'une quelconque des revendications 1 à 5, caractérisé en ce que la couche de filtrage fin (17) est constituée de fibres obtenues par extrusion-soufflage.
  9. Sac filtrant anti-poussière selon l'une quelconque des revendications 1 à 8, caractérisé en ce que la couche de filtrage fin (17) est chargée électrostatiquement.
EP07820912A 2006-10-04 2007-10-04 Poche de filtre à poussière construite en plusieurs couches Expired - Fee Related EP2066214B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610046939 DE102006046939A1 (de) 2006-10-04 2006-10-04 Mehrlagig aufgebauter Staubfilterbeutel
PCT/EP2007/060535 WO2008040776A2 (fr) 2006-10-04 2007-10-04 Poche de filtre à poussière construite en plusieurs couches

Publications (2)

Publication Number Publication Date
EP2066214A2 EP2066214A2 (fr) 2009-06-10
EP2066214B1 true EP2066214B1 (fr) 2012-02-29

Family

ID=38820267

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07820912A Expired - Fee Related EP2066214B1 (fr) 2006-10-04 2007-10-04 Poche de filtre à poussière construite en plusieurs couches

Country Status (3)

Country Link
EP (1) EP2066214B1 (fr)
DE (1) DE102006046939A1 (fr)
WO (1) WO2008040776A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102551604A (zh) * 2010-12-16 2012-07-11 莱克电气股份有限公司 吸尘器用的尘袋

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US956862A (en) * 1908-12-31 1910-05-03 John G Meyer Vacuum dust-remover.
DE484759C (de) * 1927-06-03 1929-10-21 Friedrich Wilhelm Carl Alex Fe Aus Papier hergestellter Staubbeutel fuer Staubsauger
FR1215496A (fr) * 1958-02-14 1960-04-19 Fortuna Werke Spezialmaschinen Filtre à poussière
DE2127708A1 (de) * 1970-06-20 1971-12-23 FISPA ApA, Turin (Italien) Mehrstoffluftfiltermatenal und Verfahren zu seiner Herstellung
DE10223640A1 (de) * 2002-05-28 2003-12-24 Techtex Gmbh Vliesstoffe Filtervliesstoff
DE202005010357U1 (de) * 2005-07-01 2005-09-08 Branofilter Gmbh Staubfilterbeutel

Also Published As

Publication number Publication date
WO2008040776A3 (fr) 2008-07-17
EP2066214A2 (fr) 2009-06-10
WO2008040776A2 (fr) 2008-04-10
DE102006046939A1 (de) 2008-04-10

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