EP2066214A2 - Mehrlagig aufgebauter staubfilterbeutel für einen staubsauger - Google Patents
Mehrlagig aufgebauter staubfilterbeutel für einen staubsaugerInfo
- Publication number
- EP2066214A2 EP2066214A2 EP07820912A EP07820912A EP2066214A2 EP 2066214 A2 EP2066214 A2 EP 2066214A2 EP 07820912 A EP07820912 A EP 07820912A EP 07820912 A EP07820912 A EP 07820912A EP 2066214 A2 EP2066214 A2 EP 2066214A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- filter
- filter bag
- dust filter
- dust
- 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.)
- Granted
Links
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 prefilter layer arranged in the flow direction fine filter layer having an air permeability of 8000 l / m 2 s or has less.
- Dust filter bags of the type in question are in the usual way from 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 degree of separation 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 toward the downstream side, these pores are always 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.
- the prefilter layer has both coarse and fine filter properties, this with a still high permeability to air.
- the separation elements are part of the pre-filter layer. This further results in an enlargement of the surface of the pre-filter layer and, consequently, an increase in the attachment forces for the dust particles.
- the fibrous separating elements extending transversely to the surface extent of the prefilter layer represent a kind of cilia surface, the free length of these separating elements being selected as a function of the selected fibrous material such that they are at least in the operating position of the vacuum cleaner, ie in filter operation, in which even by bending it to a certain superimposition, for example, in scaly form, can still be given the desired air permeability.
- 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 filter depth direction ie in the direction of flow
- the prefilter zone formed by the precipitation elements practically no density or pore size gradient preferably results.
- the selected embodiment further achieves a thin and flexible filter bag structure which further allows the known connection of the individual media layers, such as ultrasonic welding along the edges.
- the separation elements can 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 separating elements may be provided on one side transversely projecting to the surface of the pre-filter Vorrich 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 added less by the particulate matter passing through it during the operating period.
- 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, may first be bonded 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 processes known for carpet manufacture.
- 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 may be multi-layered, with the proposed precipitation elements also being provided in the area of all or at least a plurality of prefilter layers in such a multi-layered embodiment.
- 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 synthetic fibers based on polyolefins, polyesters, polyamides, polyacrylonitrile and / or polyvinyl alcohol are also suitable for the prefilter layer.
- 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 basis weight 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.
- Figure 1 is a perspective view of a vacuum cleaner, comprising a dust filter bag of the type in question.
- FIG. 3 is a schematic sectional view through a portion of the filter bag in operational readiness position
- FIG. 4 shows the enlargement of the region IV in FIG. 3.
- a vacuum cleaner 1 in particular household vacuum cleaner, which is designed as a hand-held handle unit.
- This first comprises a base unit 2, with an unshown electric motor 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 area of the free end of the stem 7 is an actuation 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 port of the attachment 9, not shown, is fluidly connected to the recorded in the filter cartridge 3 Staubfilterbeute 4, including an unillustrated flow channel passes through the base unit 2. On the end side, this flow channel merges into a connection section 10.
- the filter bag 4 When not in use, d. H. 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 closing position according to FIG. 3 is preferably spring-assisted.
- the illustrated dust filter bag 4 is operable in overhead position. According to this embodiment, the dirt and dust particles which sink onto the bottom formed by the holding plate 12 after the suction air flow has been switched off can not pass back into the flow channel through the passage opening 13.
- the bag 14 consists essentially of two layers superimposed in the thickness direction, such as a first prefilter layer 16 facing the inside of the bag and a bag-outer fine filter layer 17 covering the prefilter layer 16 over all surfaces.
- the prefilter layer consists of at least one sheet layer (spunbond or Thermobond), while the fine filter layer 17 is formed from 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 prefilter 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 secondary filtration layer consists of finer fibers and correspondingly has a smaller pore volume, the air permeability of this downstream layer being, for example, 4,000 l / m 2 s, this with a surface dimension of, for example, 100 g / m 2 .
- the surface of the prefilter layer 16 which faces the inside of the bag, ie in the direction of flow, is provided with separation elements 19. These extend transversely to the surface extension of the prefilter layer 16 starting therefrom, wherein furthermore the separation elements 19 are rooted in the prefilter layer 16, ie are connected thereto.
- the separation elements 19 By the separation elements 19, the upstream surface of the prefilter layer 16 is increased, which provides a prefiltration of fine dust. This continues at a high air throughput known for pre-filters.
- the fibrous separating elements 19 oriented substantially perpendicular to the surface of the prefilter layer 16, there are no or no significant density or pore size changes in the depth direction, ie in air through the etching zone in the region of the zone formed by the separating elements 19.
- the zone 18 can also be formed by separation elements 19, which in the form of, for example, loose fibers or tufts are applied over the entire area or partially by enticing and / or adhesively applied to the assigned pre-filter area.
- the prefilter layer 16 may be electrostatically charged together with the separation elements 19, which further supports the fine filtration.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filters For Electric Vacuum Cleaners (AREA)
- Filtering Materials (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Description
Claims
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 (de) | 2006-10-04 | 2007-10-04 | Mehrlagig aufgebauter staubfilterbeutel für einen staubsauger |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2066214A2 true EP2066214A2 (de) | 2009-06-10 |
EP2066214B1 EP2066214B1 (de) | 2012-02-29 |
Family
ID=38820267
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07820912A Expired - Fee Related EP2066214B1 (de) | 2006-10-04 | 2007-10-04 | Mehrlagig aufgebauter staubfilterbeutel für einen staubsauger |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2066214B1 (de) |
DE (1) | DE102006046939A1 (de) |
WO (1) | WO2008040776A2 (de) |
Families Citing this family (1)
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)
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 |
-
2006
- 2006-10-04 DE DE200610046939 patent/DE102006046939A1/de not_active Withdrawn
-
2007
- 2007-10-04 WO PCT/EP2007/060535 patent/WO2008040776A2/de active Search and Examination
- 2007-10-04 EP EP07820912A patent/EP2066214B1/de not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2008040776A3 * |
Also Published As
Publication number | Publication date |
---|---|
EP2066214B1 (de) | 2012-02-29 |
WO2008040776A3 (de) | 2008-07-17 |
WO2008040776A2 (de) | 2008-04-10 |
DE102006046939A1 (de) | 2008-04-10 |
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