EP2177145A1 - Filter bag - Google Patents

Filter bag Download PDF

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Publication number
EP2177145A1
EP2177145A1 EP10153384A EP10153384A EP2177145A1 EP 2177145 A1 EP2177145 A1 EP 2177145A1 EP 10153384 A EP10153384 A EP 10153384A EP 10153384 A EP10153384 A EP 10153384A EP 2177145 A1 EP2177145 A1 EP 2177145A1
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EP
European Patent Office
Prior art keywords
chamber
filter
filter bag
air
bag
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Granted
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EP10153384A
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German (de)
French (fr)
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EP2177145B1 (en
Inventor
Wolfgang Czado
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Wolf PVG GmbH and Co KG
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Wolf PVG GmbH and Co KG
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Application filed by Wolf PVG GmbH and Co KG filed Critical Wolf PVG GmbH and Co KG
Priority to PL10153384T priority Critical patent/PL2177145T3/en
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    • 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
    • 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
    • A47L9/102—Dust separators

Definitions

  • the present invention relates to a filter bag, in particular for vacuum cleaners, with a bag formed from air-permeable filter material, on which an inlet opening for air to be filtered is formed.
  • filter bags for vacuum cleaners which have an interior for receiving dust, and may be formed as a flat or block bottom bag.
  • a filter material paper or a nonwoven fabric is used, with multi-layer filter materials are used for effective filtering. This dust particles can settle with increasing filling just in a fine filtration in the outer region of the bag, resulting in a blockage. As the filling increases, therefore, the air volume flow conveyed through the filter bag decreases.
  • the US 5,658,362 shows a vacuum cleaner bag, in which in Fig. 18 adjacent to an inflow opening, a deflection is disposed within the vacuum cleaner bag. Thereby, an incoming air flow can be deflected, so that a flow through the vacuum cleaner bag is achieved in the longitudinal direction.
  • the volume flow drop at an increasing filling of the vacuum cleaner bag is not significantly reduced by a deflection element designed in this way.
  • the US 3,370,405 discloses a vacuum cleaner bag made of a filter paper, which has an intermediate wall in the interior.
  • a strip is glued to opposite longitudinal edges with the filter paper of the vacuum cleaner bag on the inside, which is relatively expensive to manufacture.
  • a passage opening is formed, which is formed at an opposite end to an inflow opening.
  • the intermediate wall thus forms a kind of impact protection, however, is formed by the subdivision with the relatively narrow partition only an elongated inflow, which can not prevent a significant drop in the volume flow with increasing loading of the vacuum cleaner bag with dust. Because in the inlet channel dust can hardly accumulate due to the flow conditions.
  • the filter bag comprises a bag having an interior partitioned into at least two chambers.
  • the incoming air can be prefiltered in a first chamber and filtered in a second chamber. This increases the available filter area and prevents the area of the fine filtration from quickly becoming clogged when the filter bag is filled. As a result, the effective filter performance of the filter bag can be extended.
  • the partition comprises a predetermined breaking point, which allows separation of the partition at a predetermined filling. Then it is ensured that the filling volume of the filter bag is not limited by the volume of the first chamber, but the filter bag can be used in its entirety.
  • the partition is formed as an intermediate wall which is connected at least on two opposite sides with the filter material.
  • the partition can be fixed, for example, on three sides to a side seam of the filter bag and form on a fourth side an open transition between the first chamber and the second chamber. Because for the present purposes, it is not necessary to separate the two chambers hermetically from each other, but a certain volume flow of air can be quite exchanged between the first and the second chamber.
  • a first chamber for coarse filtering of the incoming air and a second chamber for fine filtering of the air exiting from the first chamber is used.
  • larger dust particles can be prefiltered and they can not clog the pores of the fine filter.
  • a partition has a density gradient and is designed to be more open on the upstream side than on the downstream side.
  • coarser and finer dust can be retained and stored on the partition, so that the remaining filter material of the bag is less heavily loaded with dust.
  • multilayer materials in particular using spunbond, meltblown and volume nonwoven fabric, can be used.
  • the partition wall between the first chamber and the second chamber has a greater air permeability than the filter material of the bag. It can also be a material with lower air permeability or the same material used as the filter bag. This makes it possible to produce a filter bag with two chambers with a few elements.
  • the partition wall can be designed to be elastic and are stretched with increasing filling, wherein the air permeability in the stretched state is greater than in the unstretched state. Then it is ensured that the filter bag can be completely filled, and the first chamber does not unnecessarily limit the filling volume.
  • Non-woven fabrics, woven fabrics, knitted fabrics or foam rubber can be used as the dividing wall.
  • the first chamber is connected to the second chamber via at least one bypass opening.
  • the bypass opening is arranged adjacent to the inlet opening, so that the incoming air can flow only by a deflection through the bypass opening, it is achieved that the air flowing through the bypass opening discharges dust particles into the antechamber by centrifugal force to some extent.
  • the partition wall is formed substantially rectangular and fixed in the region of the holding plate on this or the filter bag via a weld. Because when the air flow pushes the partition in the direction of the ground, the fixation on the upper layer of filter material or the holding plate prevents the partition from sinking too far down to the lower layer of filter material.
  • a filter bag 1 comprises an upper layer 2 and a lower layer 3 of filter material, which are welded together at their edges 4, wherein the filter bag 1 is formed as a flat or block bottom bag. The side edges can also be folded.
  • the filter material may be formed from a single or multi-layer nonwoven fabric or paper.
  • a Holding plate 5 provided of cardboard or plastic, in which an inlet opening 6 is arranged for air to be filtered.
  • a partition wall 7 in the form of a bag is arranged, which forms a first chamber 9, which is connected to the inflow opening 6 on the holding plate 5.
  • the partition wall 7 is surrounded by a second chamber 10 which fills the remaining part of the space between the upper and lower layers 2 and 3.
  • the bag-shaped partition wall 7 is made of a stretchable material, such as an elastic woven or knitted fabric, which can stretch with increasing filling or due to air resistance.
  • the dividing wall 7 can also be formed by nonwovens, such as spunbond nonwovens or carded nonwovens or by foam rubber.
  • one or more bypass openings 12 may be recessed, so that the incoming air from the first chamber 9 can flow into the second chamber 10.
  • the partition wall 7 consists of a very air-permeable material, so that the air entering through the inlet opening 6 is only freed of coarse dirt particles. Subsequently, the air enters the second chamber 10, wherein a complete filtering of the air through the upper layer 2 and lower layer 3 is made of filter material. Due to the partition wall 7 as a pre-filter, however, it is possible that the pores of the layers 2 and 3 of filter material do not clog up so quickly.
  • partition wall 7 may be provided with a predetermined breaking point, so that tears from a certain degree of filling of the bag and the air can then flow largely unhindered into the chamber 10. Then occurs, although the adverse effect that even coarse dirt particles enforce the fine pores of the layers of filter material 2 and 3, but this type of constipation takes place at a later date than if no partition 7 would be provided.
  • the bypass opening 12 can be arranged so that incoming air can escape through the bypass opening only when it is deflected from its direction of entry. Because then filtering can be achieved due to the centrifugal forces, with coarser dust particles stuck within the bag-shaped partition wall 7 and the remaining air passes through the bypass opening 12 into the second chamber 10.
  • FIGS. 2A to 2C is a second embodiment of a filter bag 1 'shown, in which the layers 2 and 3 are formed of filter material and the holding plate 5 with the inflow opening 6 as in the first embodiment.
  • the subdivision of the interior of the bag into a first chamber 9 'and a second chamber 10' does not take place via a bag-shaped dividing wall but through a dividing wall 7 'which is fixed on opposite sides to the layers 2 and 3.
  • the partition wall 7 extends over the majority of the interior and is fixed to three side edges 13, 14 and 15, wherein the partition wall 7 when welding the filter layers 2 and 3 in the edge region can also be set with.
  • a transition 16 between the first chamber 9 'and the second chamber 10' is formed, so that a complete filling of the filter bag 1 'is possible.
  • the coarse dust in the incoming air can settle on the partition wall 7 ', so that it does not immediately clog the fine-pored filter material of the layers 2 and 3.
  • a modified partition wall 7 " is provided, wherein the filter bag is otherwise designed as in the preceding embodiments
  • the partition wall 7" is welded only at one side edge 13 over the entire length with the layers 2 and 3, and is at the opposite Side with a strip 18 at the top layer 2 of Filtennaterial determined by a welding or gluing.
  • the dividing wall 7 " is trapezoidal in the region of the holding plate 5. The inflowing air is first directed against the dividing wall 7", which is held up by the attachment to the strip 18 and does not close the lower chamber 10 " from the first chamber 9 "through the trapezoidal configuration of the partition 7" into the lower chamber 10 "arrive.
  • the strip 18 may have a length of for example 5 to 50 mm and extend over only a part of the width of the filter bag, preferably less than 50%.
  • the partition wall 7 " can also be rectangular with the fixation by the strip 18 as in FIG. 2 be educated.
  • holders or spacers for fixing the dividing wall 7, 7 'and 7 " can additionally be used in the filter bag
  • the dividing wall 7, 7' and 7" can be provided with predetermined breaking points, so that at a certain degree of filling or a predetermined load Tearing takes place and the second chamber 10, 10 'and 10 "is used in each case as a filter room.
  • FIG. 4 is shown a graph of the suction volume flow at a certain dust load. In a vacuum cleaner of a commercially available device, the suction volume flow was measured at different filling.
  • the line reproduces the measurement results for a standard bag made of five-ply non-woven material with a layer of spunbond, nonwoven, spunbond, meltblow, and spunbond.
  • the decrease in the suction volume flow is greatest with increasing filling.
  • the pores of the fine filter layer increase the fastest and the effective cleaning performance decreases.
  • the line 21 shows a filter bag in which an inner bag is provided.
  • the bag is made of the same material as the standard bag, with the addition of an inner bag of spunbond with 12 gr. Per m 2 and a width x length of 120 mm x 275 mm in the flat state is introduced.
  • the inner bag is arranged transversely to the direction of use of the dust bag in the device and centrally to the inflow opening in the bag and has on the inner bag outer sides two 20 mm diameter bypass openings, which are arranged towards the bag tip, as shown schematically in FIG FIG. 1 is shown.
  • the line 22 shows a standard bag, in which accordingly FIGS. 3A and 3B a partition wall 7 "is inserted, wherein the partition wall 7" consists of a 60 gr. per m 2 polyester carded web and has a width x length of 200 mm x 275 mm and at its sides and the end with the weld of the layers 2 and 3 is welded from Filtennaterial.
  • the trapezoidal tip is connected as a strip with the upper layer 2 of the filter bag and the trapezoidal legs fall off at an angle of 30 ° to the side.
  • the lines 21 and 22 show that by inserting a dividing wall into a filter bag, the suction power can be kept relatively high, especially with larger fill levels. This is mainly due to the fact that the fine pores of layers 2 and 3 of filter material do not clog as quickly as with a standard bag.

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

Abstract

The filter bag (1) has a sac formed from an air permeable filter material (2, 3), and an inlet opening (6) formed at the sac for air to be filtered. An inner cavity of the sac is divided into two chambers (9, 10), where the chamber (9) is used for coarse filtering of the air and the chamber (10) is used for fine filtering of the air that is released from the former chamber. A partition wall exhibits a density gradient, and is elastically formed.

Description

Die vorliegende Erfindung betrifft einen Filterbeutel, insbesondere für Staubsauger, mit einem aus luftdurchlässigem Filtermaterial gebildeten Beutel, an dem eine Einlassöffnung für zu filternde Luft ausgebildet ist.The present invention relates to a filter bag, in particular for vacuum cleaners, with a bag formed from air-permeable filter material, on which an inlet opening for air to be filtered is formed.

Es gibt Filterbeutel für Staubsauger, die zur Aufnahme von Staub einen Innenraum aufweisen, und als Flach- oder Klotzbodenbeutel ausgebildet sein können. Als Filtermaterial wird Papier oder ein Vliesstoff eingesetzt, wobei auch mehrlagige Filtermaterialien für eine effektive Filterung verwendet werden. Dabei können sich Staubpartikel mit zunehmender Befüllung gerade bei einer Feinfilterung im äußeren Bereich des Beutels absetzen, was zu einer Verstopfung führt. Mit zunehmender Befüllung sinkt daher der durch den Filterbeutel geförderten Luftvolumenstrom ab.There are filter bags for vacuum cleaners, which have an interior for receiving dust, and may be formed as a flat or block bottom bag. As a filter material paper or a nonwoven fabric is used, with multi-layer filter materials are used for effective filtering. This dust particles can settle with increasing filling just in a fine filtration in the outer region of the bag, resulting in a blockage. As the filling increases, therefore, the air volume flow conveyed through the filter bag decreases.

Die US 5,658,362 zeigt einen Staubsaugerbeutel, bei dem in Fig. 18 benachbart zu einer Einströmöffnung eine Umlenkung innerhalb des Staubsaugerbeutels angeordnet ist. Dadurch kann ein eintretender Luftstrom abgelenkt werden, so dass ein Durchströmen der Staubsaugerbeutels in dessen Längsrichtung erreicht wird. Der Volumenstromabfall bei einer zunehmenden Befüllung des Staubsaugerbeutels wird durch ein so gestaltetes Umlenkelement allerdings nicht wesentlich vermindert.The US 5,658,362 shows a vacuum cleaner bag, in which in Fig. 18 adjacent to an inflow opening, a deflection is disposed within the vacuum cleaner bag. Thereby, an incoming air flow can be deflected, so that a flow through the vacuum cleaner bag is achieved in the longitudinal direction. The volume flow drop at an increasing filling of the vacuum cleaner bag is not significantly reduced by a deflection element designed in this way.

Die US 3,370,405 offenbart einen Staubsaugerbeutel aus einem Filterpapier, der im Innenraum eine Zwischenwand aufweist. Hierfür ist ein Streifen an gegenüberliegenden Längskanten mit dem Filterpapier des Staubsaugerbeutels an dessen Innenseite verklebt, was relativ aufwendig in der Herstellung ist. In der Zwischenwand ist eine Durchtrittsöffnung ausgebildet, die an einem zu einer Einströmöffnung gegenüberliegenden Ende ausgebildet ist. Die Zwischenwand bildet somit eine Art Prallschutz, allerdings wird durch die Unterteilung mit der relativ schmalen Zwischenwand nur ein länglicher Einströmkanal ausgebildet, der bei zunehmender Beladung des Staubsaugerbeutels mit Staub einen erheblichen Abfall des Volumenstroms nicht verhindern kann. Denn in dem Einströmkanal kann sich Staub aufgrund der Strömungsverhältnisse kaum ansammeln.The US 3,370,405 discloses a vacuum cleaner bag made of a filter paper, which has an intermediate wall in the interior. For this purpose, a strip is glued to opposite longitudinal edges with the filter paper of the vacuum cleaner bag on the inside, which is relatively expensive to manufacture. In the intermediate wall, a passage opening is formed, which is formed at an opposite end to an inflow opening. The intermediate wall thus forms a kind of impact protection, however, is formed by the subdivision with the relatively narrow partition only an elongated inflow, which can not prevent a significant drop in the volume flow with increasing loading of the vacuum cleaner bag with dust. Because in the inlet channel dust can hardly accumulate due to the flow conditions.

Es ist daher Aufgabe der vorliegenden Erfindung einen Filterbeutel zu schaffen, der auch mit zunehmender Befüllung noch eine hohe Filterleistung besitzt.It is therefore an object of the present invention to provide a filter bag, which still has a high filter performance with increasing filling.

Diese Aufgabe wird mit einem Filterbeutel mit den Merkmalen des Anspruches 1 gelöst.This object is achieved with a filter bag having the features of claim 1.

Der Filterbeutel umfasst einen Beutel mit einem Innenraum, der in mindestens zwei Kammern unterteilt ist. Dadurch kann die eintretende Luft in einer ersten Kammer vorgefiltert und in einer zweiten Kammer nachgefiltert werden. Dies erhöht die zur Verfügung stehende Filterfläche und es wird verhindert, dass der Bereich der Feinfilterung sich bei einer Befüllung des Filterbeutels schnell zusetzt. Dadurch kann die effektive Filterleistung des Filterbeutels verlängert werden.The filter bag comprises a bag having an interior partitioned into at least two chambers. As a result, the incoming air can be prefiltered in a first chamber and filtered in a second chamber. This increases the available filter area and prevents the area of the fine filtration from quickly becoming clogged when the filter bag is filled. As a result, the effective filter performance of the filter bag can be extended.

Die Trennwand umfasst eine Sollbruchstelle, die ein Auftrennen der Trennwand bei einer vorbestimmten Füllung ermöglicht. Dann ist gewährleistet, dass das Füllvolumen des Filterbeutels nicht durch das Volumen der ersten Kammer begrenzt ist, sondern der Filterbeutel in seiner Gesamtheit genutzt werden kann.The partition comprises a predetermined breaking point, which allows separation of the partition at a predetermined filling. Then it is ensured that the filling volume of the filter bag is not limited by the volume of the first chamber, but the filter bag can be used in its entirety.

Die Trennwand ist dabei als Zwischenwand ausgebildet, die zumindest an zwei gegenüberliegenden Seiten mit dem Filtermaterial verbunden ist. Die Trennwand kann dabei beispielsweise an drei Seiten an einer Seitennaht des Filterbeutels fixiert sein und an einer vierten Seite einen offenen Übergang zwischen der ersten Kammer und der zweiten Kammer ausbilden. Denn für die vorliegenden Zwecke ist es nicht notwendig, die beiden Kammern hermetisch voneinander zu trennen, sondern ein gewisser Volumenstrom an Luft kann durchaus zwischen der ersten und der zweiten Kammer ausgetauscht werden.The partition is formed as an intermediate wall which is connected at least on two opposite sides with the filter material. The partition can be fixed, for example, on three sides to a side seam of the filter bag and form on a fourth side an open transition between the first chamber and the second chamber. Because for the present purposes, it is not necessary to separate the two chambers hermetically from each other, but a certain volume flow of air can be quite exchanged between the first and the second chamber.

Gemäß einer bevorzugten Ausgestaltung der Erfindung dient eine erste Kammer zur Grobfilterung der eintretenden Luft und eine zweite Kammer zur Feinfilterung der aus der ersten Kammer austretenden Luft. Dadurch können größere Staubpartikel vorgefiltert werden und diese können die Poren des Feinfilters nicht zusetzen.According to a preferred embodiment of the invention, a first chamber for coarse filtering of the incoming air and a second chamber for fine filtering of the air exiting from the first chamber is used. As a result, larger dust particles can be prefiltered and they can not clog the pores of the fine filter.

Gemäß einer weiteren Ausgestaltung der Erfindung weist eine Trennwand einen Dichtegradienten auf und ist an der Anströmseite offener ausgestaltet als an der Abströmseite. Dadurch kann an der Trennwand gröberer und feinerer Staub zurückgehalten und gespeichert werden, so dass das übrige Filtermaterial des Beutels weniger stark mit Staub beladen wird. Zur Realisierung eines solchen Dichtegradienten können mehrlagige Materialien, insbesondere unter Verwendung von Spunbond, Meltblow und Volumenvlies.According to a further embodiment of the invention, a partition has a density gradient and is designed to be more open on the upstream side than on the downstream side. As a result, coarser and finer dust can be retained and stored on the partition, so that the remaining filter material of the bag is less heavily loaded with dust. To realize such a density gradient, multilayer materials, in particular using spunbond, meltblown and volume nonwoven fabric, can be used.

Dabei ist es möglich, dass die Trennwand zwischen der ersten Kammer und der zweiten Kammer eine größere Luftdurchlässigkeit auf als das Filtermaterial des Beutels. Es kann auch ein Material mit geringerer Luftdurchlässigkeit oder das gleiche Material wie beim Filterbeutel eingesetzt werden. Dadurch lässt sich ein Filterbeutel mit zwei Kammern mit wenigen Elementen fertigen.It is possible that the partition wall between the first chamber and the second chamber has a greater air permeability than the filter material of the bag. It can also be a material with lower air permeability or the same material used as the filter bag. This makes it possible to produce a filter bag with two chambers with a few elements.

Die Trennwand kann dabei elastisch ausgebildet sein und bei zunehmender Befüllung gedehnt werden, wobei die Luftdurchlässigkeit in gedehntem Zustand größer ist als im ungedehnten Zustand. Dann ist sichergestellt, dass der Filterbeutel vollständig befüllt werden kann, und die erste Kammer nicht das Füllvolumen unnötig begrenzt. Als Trennwand können Vliesstoffe, Gewebe, Gestricke oder Schaumgummi eingesetzt werden.The partition wall can be designed to be elastic and are stretched with increasing filling, wherein the air permeability in the stretched state is greater than in the unstretched state. Then it is ensured that the filter bag can be completely filled, and the first chamber does not unnecessarily limit the filling volume. Non-woven fabrics, woven fabrics, knitted fabrics or foam rubber can be used as the dividing wall.

Vorzugsweise ist die erste Kammer mit der zweiten Kammer über mindestens eine Bypass Öffnung verbunden. Dadurch ist sichergestellt, dass die Luft in jedem Fall von der ersten Kammer in die zweite Kammer strömen kann und die Trennwand lediglich eine Vorfilterfunktion besitzt. Wenn die Bypass Öffnung benachbart zu der Eintrittsöffnung angeordnet ist, so dass die eintretende Luft nur durch eine Umlenkung durch die Bypass Öffnung strömen kann, wird erreicht, dass die durch die Bypass Öffnung strömende Luft in gewissem Maße Staubpartikel in die Vorkammer durch Fliehkräfte abgibt.Preferably, the first chamber is connected to the second chamber via at least one bypass opening. This ensures that the air in any case can flow from the first chamber into the second chamber and the partition has only a pre-filter function. If the bypass opening is arranged adjacent to the inlet opening, so that the incoming air can flow only by a deflection through the bypass opening, it is achieved that the air flowing through the bypass opening discharges dust particles into the antechamber by centrifugal force to some extent.

Vorzugsweise ist die Trennwand im wesentlichen rechteckig ausgebildet und im Bereich der Halteplatte an dieser oder dem Filterbeutel über eine Verschweißung fixiert. Denn wenn der Luftstrom die Trennwand in Richtung des Boden drückt, verhindert die Fixierung an der oberen Lage aus Filtermaterial oder der Halteplatte, dass die Trennwand zu weit nach unten zu der unteren Lage aus Filtermaterial absinkt.Preferably, the partition wall is formed substantially rectangular and fixed in the region of the holding plate on this or the filter bag via a weld. Because when the air flow pushes the partition in the direction of the ground, the fixation on the upper layer of filter material or the holding plate prevents the partition from sinking too far down to the lower layer of filter material.

Die Erfindung wird nachfolgend anhand mehrer Ausführungsbeispiele mit Bezug auf die beigefügten Zeichnungen näher erläutert. Es zeigen:

Figur 1
eine schematische Ansicht einer nicht zur Erfindung gehörenden Ausführungsform eines Filterbeutels;
Figur 2A, B, C
mehrere Ansichten eines Filterbeutels gemäß einer modifizierten Ausführungsform eines Filterbeutels;
Figur 3A und 3B
zwei Ansichten eines erfindungsgemäßen Filterbeutels, und
Figur 4
eine Graphik zu der Saugleistung unterschiedlicher Filterbeutel.
The invention will be explained in more detail with reference to several embodiments with reference to the accompanying drawings. Show it:
FIG. 1
a schematic view of a non-invention embodiment of a filter bag;
FIG. 2A, B, C
several views of a filter bag according to a modified embodiment of a filter bag;
FIGS. 3A and 3B
two views of a filter bag according to the invention, and
FIG. 4
a graphic of the suction performance of different filter bags.

Ein Filterbeutel 1 umfasst eine obere Lage 2 und eine untere Lage 3 aus Filtermaterial, die an ihren Kanten 4 miteinander verschweißt sind, wobei der Filterbeutel 1 als Flach- oder Klotzbodenbeutel ausgebildet ist. Dabei können die Seitenkanten auch eingefaltet sein. Das Filtermaterial kann aus einem ein- oder mehrlagigen Vliesstoff oder Papier gebildet sein. An der oberen Lage 2 aus Filtermaterial ist eine Halteplatte 5 aus Pappe oder Kunststoff vorgesehen, in der eine Eintrittsöffnung 6 für zu filternde Luft angeordnet ist.A filter bag 1 comprises an upper layer 2 and a lower layer 3 of filter material, which are welded together at their edges 4, wherein the filter bag 1 is formed as a flat or block bottom bag. The side edges can also be folded. The filter material may be formed from a single or multi-layer nonwoven fabric or paper. At the upper layer 2 of filter material is a Holding plate 5 provided of cardboard or plastic, in which an inlet opening 6 is arranged for air to be filtered.

In dem Innenraum des Beutels ist eine Trennwand 7 in Form eines Beutels angeordnet, der eine erste Kammer 9 ausbildet, die mit der Einströmöffnung 6 an der Halteplatte 5 verbunden ist. Die Trennwand 7 ist von einer zweiten Kammer 10 umgeben, die den übrigen Teil des Raumes zwischen der oberen und unteren Lage 2 und 3 ausfüllt. Die beutelförmige Trennwand 7 besteht aus einem dehnbaren Material, beispielsweise aus einem elastischen Gewebe oder Gestricke, das sich bei zunehmender Füllung oder aufgrund des Luftwiderstandes dehnen kann. Ferner kann die Trennwand 7 auch durch Vliesstoffe, wie Spunbond-Vliese oder Krempel-Vliese oder durch Schaumgummi gebildet sein. An der Trennwand 7 können ein oder mehrere Bypass Öffnungen 12 ausgespart sein, so dass die eintretende Luft aus der ersten Kammer 9 in die zweite Kammer 10 strömen kann. Die Trennwand 7 besteht aus einem sehr luftdurchlässigen Material, so dass die durch die Einströmöffnung 6 eintretende Luft nur von groben Schmutzpartikeln befreit wird. Anschließend gelangt die Luft in die zweite Kammer 10, wobei eine vollständige Filterung der Luft durch die obere Lage 2 und untere Lage 3 aus Filtermaterial erfolgt. Durch die Trennwand 7 als Vorfilter ist es jedoch möglich, dass sich die Poren der Lagen 2 und 3 aus Filtermaterial nicht so schnell zusetzen.In the interior of the bag, a partition wall 7 in the form of a bag is arranged, which forms a first chamber 9, which is connected to the inflow opening 6 on the holding plate 5. The partition wall 7 is surrounded by a second chamber 10 which fills the remaining part of the space between the upper and lower layers 2 and 3. The bag-shaped partition wall 7 is made of a stretchable material, such as an elastic woven or knitted fabric, which can stretch with increasing filling or due to air resistance. Furthermore, the dividing wall 7 can also be formed by nonwovens, such as spunbond nonwovens or carded nonwovens or by foam rubber. On the partition 7, one or more bypass openings 12 may be recessed, so that the incoming air from the first chamber 9 can flow into the second chamber 10. The partition wall 7 consists of a very air-permeable material, so that the air entering through the inlet opening 6 is only freed of coarse dirt particles. Subsequently, the air enters the second chamber 10, wherein a complete filtering of the air through the upper layer 2 and lower layer 3 is made of filter material. Due to the partition wall 7 as a pre-filter, however, it is possible that the pores of the layers 2 and 3 of filter material do not clog up so quickly.

Ferner kann die Trennwand 7 mit einer Sollbruchstelle versehen sein, so dass ab einem bestimmten Füllgrad der Beutel aufreißt und die Luft dann weitgehend ungehindert in die Kammer 10 strömen kann. Dann tritt zwar der nachteilige Effekt ein, dass auch grobe Schmutzpartikel die feinen Poren der Lagen aus Filtermaterial 2 und 3 zusetzen, allerdings erfolgt diese Art der Verstopfung erst zu einem späteren Zeitpunkt als wenn keine Trennwand 7 vorgesehen wäre.Further, the partition wall 7 may be provided with a predetermined breaking point, so that tears from a certain degree of filling of the bag and the air can then flow largely unhindered into the chamber 10. Then occurs, although the adverse effect that even coarse dirt particles enforce the fine pores of the layers of filter material 2 and 3, but this type of constipation takes place at a later date than if no partition 7 would be provided.

Die Bypass Öffnung 12 kann so angeordnet sein, dass eintretende Luft nur dann durch die Bypass Öffnung austreten kann, wenn sie von ihrer Eintrittsrichtung umgelenkt wird. Denn dann kann aufgrund der Fliehkräfte schon eine Filterung erreicht werden, wobei gröbere Staubpartikel innerhalb der beutelförmigen Trennwand 7 hängen bleiben und die übrige Luft durch die Bypass Öffnung 12 in die zweite Kammer 10 gelangt.The bypass opening 12 can be arranged so that incoming air can escape through the bypass opening only when it is deflected from its direction of entry. Because then filtering can be achieved due to the centrifugal forces, with coarser dust particles stuck within the bag-shaped partition wall 7 and the remaining air passes through the bypass opening 12 into the second chamber 10.

In den Figuren 2A bis 2C ist eine zweite Ausführungsform eines Filterbeutels 1' gezeigt, bei dem die Lagen 2 und 3 aus Filtermaterial sowie die Halteplatte 5 mit der Einströmöffnung 6 wie beim ersten Ausführungsbeispiel ausgebildet sind. Die Unterteilung des Innenraumes des Beutels in eine erste Kammer 9' und eine zweite Kammer 10' erfolgt jedoch nicht über eine beutelförmige Trennwand sondern durch eine Trennwand 7', die an gegenüberliegenden Seiten an den Lagen 2 und 3 festgelegt ist.In the FIGS. 2A to 2C is a second embodiment of a filter bag 1 'shown, in which the layers 2 and 3 are formed of filter material and the holding plate 5 with the inflow opening 6 as in the first embodiment. However, the subdivision of the interior of the bag into a first chamber 9 'and a second chamber 10' does not take place via a bag-shaped dividing wall but through a dividing wall 7 'which is fixed on opposite sides to the layers 2 and 3.

Wie in Figur 2B zu sehen ist, erstreckt sich die Trennwand 7' über den überwiegenden Teil des Innenraumes und ist an drei Seitenkanten 13, 14 und 15 festgelegt, wobei die Trennwand 7 beim Zusammenschweißen der Filterlagen 2 und 3 im Randbereich ebenfalls mit festgelegt werden kann. An der vierten Seitenkante 17 ist ein Übergang 16 zwischen der ersten Kammer 9' und der zweiten Kammer 10' gebildet, so dass eine vollständige Befüllung des Filterbeutels 1' möglich ist. Der grobe Staub in der eintretenden Luft kann sich an der Trennwand 7' absetzen, so dass dieser nicht sofort das feinporige Filtermaterial der Lagen 2 und 3 verstopft. Zudem kann die Trennwand 7' wieder aus einem elastischen Material hergestellt sein, um eine gewisse Luftdurchlässigkeit auch im beladenen Zustand zu gewährleisten. Aufgrund des Überganges 16, der rund 10% bis 20 % der Fläche der Lagen 2 und 3 des Filtermaterials einnehmen kann, ist ein Einströmen von Luft in die zweite Kammer 10' ohnehin gewährleistet.As in FIG. 2B can be seen, the partition wall 7 'extends over the majority of the interior and is fixed to three side edges 13, 14 and 15, wherein the partition wall 7 when welding the filter layers 2 and 3 in the edge region can also be set with. At the fourth side edge 17, a transition 16 between the first chamber 9 'and the second chamber 10' is formed, so that a complete filling of the filter bag 1 'is possible. The coarse dust in the incoming air can settle on the partition wall 7 ', so that it does not immediately clog the fine-pored filter material of the layers 2 and 3. In addition, the partition wall 7 'again be made of an elastic material to ensure a certain air permeability even in the loaded state. Due to the transition 16, which can occupy about 10% to 20% of the surface of the layers 2 and 3 of the filter material, an influx of air into the second chamber 10 'is guaranteed anyway.

Bei dem in Figur 3A und 3B gezeigten Ausführungsbeispiel ist eine modifizierte Trennwand 7" vorgesehen, wobei der Filterbeutel im übrigen wie bei den vorangegangenen Ausführungsbeispielen gestaltet ist. Die Trennwand 7" ist nur an einer Seitenkante 13 über die gesamte Länge mit den Lagen 2 und 3 verschweißt, und ist an der gegenüberliegenden Seite mit einem Streifen 18 an der oberen Lage 2 aus Filtennaterial durch eine Verschweißung oder Verklebung festgelegt. Ferner ist die Trennwand 7" im Bereich der Halteplatte 5 trapezförmig ausgebildet. Die einströmende Luft wird zunächst gegen die Trennwand 7" gelenkt, die aufgrund der Festlegung an dem Streifen 18 hochgehalten wird und die untere Kammer 10" nicht verschließt. Ferner kann die eintretende Luft von der ersten Kammer 9" durch die trapezförmige Ausgestaltung der Trennwand 7" in die untere Kammer 10" gelangen. Der Streifen 18 kann dabei eine Länge von beispielsweise 5 bis 50mm haben und sich nur über einen Teil der Breite des Filterbeutels erstrecken, vorzugsweise um weniger als 50%. Die Trennwand 7" kann mit der Fixierung durch den Streifen 18 dabei auch rechteckig wie in Figur 2 ausgebildet sein.At the in FIGS. 3A and 3B In the embodiment shown, a modified partition wall 7 "is provided, wherein the filter bag is otherwise designed as in the preceding embodiments The partition wall 7" is welded only at one side edge 13 over the entire length with the layers 2 and 3, and is at the opposite Side with a strip 18 at the top layer 2 of Filtennaterial determined by a welding or gluing. Furthermore, the dividing wall 7 "is trapezoidal in the region of the holding plate 5. The inflowing air is first directed against the dividing wall 7", which is held up by the attachment to the strip 18 and does not close the lower chamber 10 " from the first chamber 9 "through the trapezoidal configuration of the partition 7" into the lower chamber 10 "arrive. The strip 18 may have a length of for example 5 to 50 mm and extend over only a part of the width of the filter bag, preferably less than 50%. The partition wall 7 "can also be rectangular with the fixation by the strip 18 as in FIG. 2 be educated.

In dem Filterbeutel können zusätzlich auch Halterungen oder Abstandshalter zur Fixierung der Trennwand 7, 7' und 7" eingesetzt werden. Ferner kann die Trennwand 7, 7' und 7" mit Sollbruchstellen versehen sein, so dass bei einem bestimmten Füllgrad oder einer vorgegebenen Belastung ein Aufreißen stattfindet und die zweite Kammer 10, 10' und 10" in jedem Fall als Filterraum genutzt wird.In addition, holders or spacers for fixing the dividing wall 7, 7 'and 7 "can additionally be used in the filter bag Furthermore, the dividing wall 7, 7' and 7" can be provided with predetermined breaking points, so that at a certain degree of filling or a predetermined load Tearing takes place and the second chamber 10, 10 'and 10 "is used in each case as a filter room.

In Figur 4 ist eine Grafik des Saugvolumenstromes bei einer gewissen Staubbeladung gezeigt. Bei einem Staubsauger eines handelsüblichen Gerätes wurde der Saugvolumenstrom bei unterschiedlicher Befüllung gemessen.In FIG. 4 is shown a graph of the suction volume flow at a certain dust load. In a vacuum cleaner of a commercially available device, the suction volume flow was measured at different filling.

Die Linie gibt die Messergebnisse für einen Standardbeutel wieder, der aus fünflagigem Vliesmaterial besteht und eine Lage Spundbond, Volumenvlies, Spunbond, Meltblow und Spunbond aufweist. Der Abfall des Saugvolumenstromes ist bei zunehmender Befüllung am größten. Insbesondere setzen sich die Poren der Feinfilterschicht am schnellsten zu und die effektive Reinigungsleistung lässt nach.The line reproduces the measurement results for a standard bag made of five-ply non-woven material with a layer of spunbond, nonwoven, spunbond, meltblow, and spunbond. The decrease in the suction volume flow is greatest with increasing filling. In particular, the pores of the fine filter layer increase the fastest and the effective cleaning performance decreases.

Die Linie 21 zeigt einen Filterbeutel, bei dem ein Innenbeutel vorgesehen ist. Der Beutel besteht aus demselben Material wie der Standardbeutel, wobei zusätzlich ein Innenbeutel aus Spunbond mit 12 gr. pro m2 und einer Breite x Länge von 120 mm x 275 mm im flachgelegten Zustand eingebracht ist. Der Innenbeutel ist quer zur Einsatzrichtung des Staubbeutels in das Gerät und mittig zur Einströmöffnung in dem Beutel angeordnet und besitzt an den Innenbeutelaußenseiten zwei 20 mm durchmessende Bypass Öffnungen, die in Richtung Beutelspitze angeordnet sind, wie dies schematisch in Figur 1 dargestellt ist.The line 21 shows a filter bag in which an inner bag is provided. The bag is made of the same material as the standard bag, with the addition of an inner bag of spunbond with 12 gr. Per m 2 and a width x length of 120 mm x 275 mm in the flat state is introduced. The inner bag is arranged transversely to the direction of use of the dust bag in the device and centrally to the inflow opening in the bag and has on the inner bag outer sides two 20 mm diameter bypass openings, which are arranged towards the bag tip, as shown schematically in FIG FIG. 1 is shown.

Die Linie 22 zeigt einen Standardbeutel, bei dem entsprechend Figur 3A und 3B eine Trennwand 7" eingefügt ist, wobei die Trennwand 7" aus einem 60 gr. pro m2 Polyester-Krempelvlies besteht und eine Breite x Länge von 200 mm x 275 mm aufweist und an seinen Seiten und dem Ende mit der Schweißnaht der Lagen 2 und 3 aus Filtennaterial verschweißt ist. Die Trapezspitze ist als Streifen mit der oberen Lage 2 des Filterbeutels verbunden und die Trapezschenkel fallen in einem Winkel von 30° zur Seite hin ab.The line 22 shows a standard bag, in which accordingly FIGS. 3A and 3B a partition wall 7 "is inserted, wherein the partition wall 7" consists of a 60 gr. per m 2 polyester carded web and has a width x length of 200 mm x 275 mm and at its sides and the end with the weld of the layers 2 and 3 is welded from Filtennaterial. The trapezoidal tip is connected as a strip with the upper layer 2 of the filter bag and the trapezoidal legs fall off at an angle of 30 ° to the side.

Die Linien 21 und 22 zeigen, dass durch Einfügen einer Trennwand in einen Filterbeutel gerade bei größeren Füllgraden die Saugleistung vergleichsweise hoch gehalten werden kann. Dies liegt vor allem daran, dass sich die feinen Poren der Lagen 2 und 3 aus Filtermaterial nicht so schnell zusetzen wie bei einem Standardbeutel.The lines 21 and 22 show that by inserting a dividing wall into a filter bag, the suction power can be kept relatively high, especially with larger fill levels. This is mainly due to the fact that the fine pores of layers 2 and 3 of filter material do not clog as quickly as with a standard bag.

Claims (7)

Filterbeutel (1), insbesondere für Staubsauger, mit einem aus luftdurchlässigem Filtermaterial (2, 3) gebildeten Beutel, an dem eine Einlassöffnung (6) für zu filternde Luft ausgebildet ist, wobei eine Halteplatte (5) an dem Filtennaterial (2) festgelegt ist und der Innenraum des Beutels durch eine Trennwand (7', 7") in mindestens zwei Kammern (9', 9", 10', 10") unterteilt ist, wobei die Trennwand (7', 7") als Zwischenwand ausgebildet ist, die zumindest an zwei Seiten mit dem Filtermaterial (2, 3) verbunden ist und die erste Kammer (9', 9") mit der zweiten Kammer (10', 10") über mindestens eine By-pass Öffnung oder einen Übergang verbunden ist, wobei die Trennwand (7', 7") zumindest teilweise an der Halteplatte (5) oder im Bereich der Halteplatte (5) an einer Lage aus Filtermaterial (2, 3) fixiert ist, dadurch gekennzeichnet, dass die Trennwand (7', 7") eine Sollbruchstelle aufweist, die ein Auftrennen der Trennwand (7', 7") bei einer vorbestimmten Befüllung ermöglicht.Filter bag (1), in particular for vacuum cleaners, with a bag formed from air-permeable filter material (2, 3) on which an inlet opening (6) for air to be filtered is formed, wherein a holding plate (5) is fixed to the filter material (2) and the interior of the bag is subdivided by a dividing wall (7 ', 7 ") into at least two chambers (9', 9", 10 ', 10 "), wherein the dividing wall (7', 7") is formed as an intermediate wall, which is connected to the filter material (2, 3) at least on two sides and the first chamber (9 ', 9 ") is connected to the second chamber (10', 10") via at least one by-pass opening or transition, wherein the dividing wall (7 ', 7 ") is fixed at least partially to the holding plate (5) or in the region of the holding plate (5) on a layer of filter material (2, 3), characterized in that the dividing wall (7', 7 ") has a predetermined breaking point, which allows a separation of the partition wall (7 ', 7") at a predetermined filling. Filterbeutel nach Anspruch 1, dadurch gekennzeichnet, dass eine erste Kammer (9', 9") zur Grobfilterung der eintretenden Luft und eine zweite Kammer (10', 10") zur Feinfilterung der aus der ersten Kammer (9', 9") austretenden Luft dient.Filter bag according to claim 1, characterized in that a first chamber (9 ', 9 ") for coarse filtering of the incoming air and a second chamber (10', 10") for fine filtering emerging from the first chamber (9 ', 9 ") Air serves. Filterbeutel nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Trennwand (7', 7") einen Dichtegradienten aufweist und an der Anströmseite offener ausgestaltet als an der Abströmseite.Filter bag according to claim 1 or 2, characterized in that the partition wall (7 ', 7 ") has a density gradient and designed to be more open at the upstream side than at the downstream side. Filterbeutel nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Trennwand (7', 7") elastisch ausgebildet ist und bei zunehmender Befüllung dehnbar ist, wobei die Luftdurchlässigkeit in gedehntem Zustand größer ist als im ungedehnten Zustand.Filter bag according to one of claims 1 to 3, characterized in that the partition wall (7 ', 7 ") is elastic and can be stretched with increasing filling, wherein the air permeability in the stretched state is greater than in the unstretched state. Filterbeutel nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Trennwand (7', 7") aus einem Vliesstoff, Gewebe, Gestricke oder Schaumgummi besteht.Filter bag according to one of claims 1 to 4, characterized in that the partition wall (7 ', 7 ") consists of a nonwoven fabric, woven, knitted or foam rubber. Filterbeutel nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Trennwand (7', 7") an drei Seiten an einer Seitennaht (13, 14, 15) des Filterbeutels (1) fixiert ist und an der vierten Seite (17) ein offener Übergang (16) zwischen der ersten Kammer (9', 9") und der zweiten Kammer (10', 10") gebildet ist.Filter bag according to one of claims 1 to 5, characterized in that the dividing wall (7 ', 7 ") is fixed on three sides to a side seam (13, 14, 15) of the filter bag (1) and on the fourth side (17). an open transition (16) is formed between the first chamber (9 ', 9 ") and the second chamber (10', 10"). Filterbeutel nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Trennwand (7") nur an einer Seitenkante (13) über die gesamte Länge mit den Lagen (2) und (3) verschweißt, und ist an der gegenüberliegenden Seite mit einem Streifen (18) an der oberen Lage (2) aus Filtermaterial durch eine Verschweißung oder Verklebung festgelegt.Filter bag according to one of claims 1 to 6, characterized in that the partition wall (7 ") only at one side edge (13) over the entire length with the layers (2) and (3) welded, and is on the opposite side with a Strip (18) fixed to the upper layer (2) of filter material by a welding or gluing.
EP10153384A 2006-10-23 2007-09-26 Filter bag Active EP2177145B1 (en)

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EP2177145B1 (en) 2011-12-28
EP2215951B1 (en) 2012-01-18
EP1915939B1 (en) 2012-04-11
DK2215951T3 (en) 2012-05-14
DK1915939T3 (en) 2012-07-23
PL2177145T3 (en) 2012-05-31
EP2215951A1 (en) 2010-08-11
EP1915939A1 (en) 2008-04-30
ATE552762T1 (en) 2012-04-15
ATE538707T1 (en) 2012-01-15
DE202006016303U1 (en) 2006-12-21
PL2215951T3 (en) 2012-06-29
PL1915939T3 (en) 2012-09-28
ATE541499T1 (en) 2012-02-15

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