DE102011120688B4 - Dust filter bag with a dust collector insert - Google Patents

Abstract

Dust filter bag for use in a vacuum cleaner, with
a one-layer or multi-layer bag wall (2o, 2u) which forms the outside of the dust filter bag (1) and which is formed, at least in sections, from air-permeable filter material,
- A bag interior, which is directly or indirectly enclosed by the bag wall, and
- An inlet opening (3) formed in the bag wall, wherein is provided:
- That in the bag interior an air-permeable dust collector insert (7) or more air-permeable dust collector inserts (7) is arranged loosely or are; and
- That the loose arrangement is formed such that the air-permeable dust collector insert (7) at any point a permanent connection with the bag wall (2o, 2u) or a connected to the bag wall (2o, 2u) component of the dust filter bag, and
- That the air-permeable dust collector insert (7) as a flexible and / or elastic in the extended state flat three-dimensional structure or as a rigid flat three-dimensional Structure is formed, wherein the three-dimensional structure is formed as a flat body, and
- That the flat three-dimensional structure (7) is formed of net-like or slotted or perforated sheet material, and
- That the flat three-dimensional structure has a base surface whose surface area is at a value in the range between 50 to 90% of the inlet opening (3) opposite the base surface of the dust filter bag (1).

Description

The invention is based on a dust filter bag for use in a vacuum cleaner. The dust filter bag has a single or multi-layer bag wall which forms the outside of the dust filter bag and which is formed, at least in sections, from air-permeable filter material. The bag interior is enclosed directly or indirectly by the bag wall. The dust filter bag also has an inlet opening formed in the bag wall. In the region of the inlet opening, a holding plate may be arranged, for example, fastened on the outside of the bag wall. The retaining plate serves to secure the dust filter bag in the receiving space of the vacuum cleaner. The dust filter bag can be designed as a flat bag, but also as a gusseted bag or as a block bottom bag or as a flat bag with one or more everting side gussets.

There are already various constructive measures known to obtain dust filter bag with a long service life, which can be operated over a long period of high suction power:

The WO 2007/059939 A1 in this sense, to arrange a deflector in the region of the inlet opening in a dust filter bag and an air-permeable material layer on an opposite inner side of the bag wall so that the material layer is connected at one or more locations with the bag wall and in other areas including a range of Edge of the material layer with the bag wall is unconnected. The positioning of the material layer relative to the deflection device and the attachment of the material layer to the inner wall of the bag are to be designed so that the air flow in the bag interior is allowed to flow between the material layer and the inner side of the bag. This design of the dust filter bag with internal deflection device and exactly to be positioned and to be fastened material layer is expensive. In addition, the deflection device has to be designed in such a way that it divides the air flow flowing in via the inlet opening into two partial flows.

The DE 20 2008 003 248 U1 describes dust filter bags, which also have a deflector near the inlet opening and in which a plurality of strips of material are arranged on the inside of the opposite bag wall. The deflection device is designed as a slotted deflection strip which is fixed with its two ends to the inside of the bag wall near the inlet opening. In this case too, the air flow entering the dust filter bag via the inlet opening is to be deflected and then an underflow of the material layers takes place. The material layers are complex in this case. They form a multilayer structure and are attached in a complex arrangement on the inside of the bag.

The EP 2 263 507 A1 describes dust filter bags in which a diffuser is arranged in the interior of the bag in an intermediate plane of the formed as a flat bag dust filter bag between the bag top and the bottom of the bag. The diffuser is understood to mean a structure which consists of at least two individual material strips arranged to one another or consists of flat material structures which have elongated flow openings. As an essential measure, it is provided that the diffuser is connected to the bag wall on at least one side.

Similar filter bags are in the EP 2 263 508 A1 described. Also in this case it is flat bag with diffuser in the interior of the filter bag. In this case, in each case at least two diffusers should be arranged in at least two intermediate levels, which is to be appropriately positioned with the bag wall to be connected.

The EP 2 266 450 A1 describes dust filter bag, which in each case in one or more intermediate planes in each case at least one diffuser in a corresponding manner connected to the bag wall, in which case the dust filter bag is formed as a block bottom bag.

Essential in these diverse dust filter bags with diffuser in the bag interior is that the diffusers are each accurately positioned and secured to the inside of the bag wall.

Other measures to extend the life and improve the suction are known for dust filter bag, z. B. from the DE 10 2008 031 989 A1 , There, dust filter bags are described in which an inner bag is arranged in the interior of the formed of air-permeable filter material outer bag, in which the air flow is introduced via the inlet opening. The inner bag has a bag wall of slit or perforated material.

From the DE 101 26 425 B4 a vacuum cleaner filter bag is known, which is designed as a block bottom bag, wherein on the inside of the block bottom side wall facing a piece of filter mat is applied flat. The filter mat piece has greater air permeability than the outer bag wall forming the outer filter sheet. About the filter mat piece upstream of the bag interior prefilter is obtained.

From WO 2005/060 807 a dust filter bag is known, wherein in the interior a fluid which can be stirred up under a given air flow is contained in the dust collecting space. The fluidizable material may consist of several unconnected fibers or flakes.

From the DE 10 2007 006 502 A1 a dust filter bag is known in which a loosely introduced substance such as fibers or granules is contained. The substance can also be formed from a plurality of small, disordered and mutually free bands or strip portions.

The invention has for its object to provide improved dust filter bag, which are simple in construction and easy to manufacture and at the same time have relatively long service life and provide high suction power over a relatively long period of time. This object is achieved with the subject matter of patent claim 1.

Essential in this solution is that in the bag interior an air-permeable dust collector insert is arranged loosely. This loose arrangement is designed such that the air-permeable dust collector insert at any point has a permanent connection with the bag wall or a connected to the bag wall component of the dust filter bag. Due to this loose arrangement, the air-permeable dust collector insert has increased freedom of movement in the interior of the dust filter bag.

Loose arrangement thus means that the inserted into the bag interior Staubfängereinlage is not firmly connected to the bag wall. By the term "solid compound" is meant a permanent compound, i. a lasting connection that can not be solved without destruction. A one-piece or a material connection is usually a permanent connection. Advantages of the loose arrangement are that the dust collector insert can move and shift during operation depending on the space available in the bag interior. The loose arrangement of the dust collector insert a particularly favorable turbulence and flow around the entering via the inlet opening into the bag interior dust-laden air flow can be achieved. The degree of dust deposition can thus be increased. Furthermore, the displaceability of the dust collector insert provides more space for the deposited dust. The dust deposition occurs primarily on the side facing away from the inlet opening side of the dust collector insert, i. in the space between the dust collector insert and the respective bag wall.

The air permeability of the dust collector insert supports the turbulence, the flow around and the dust separation. The air permeability of the dust collector liner can be realized by having the dust collector liner made of air-permeable material, e.g. made of filter material or else in that the dust collector insert may have an air-permeable macrostructure, e.g. in the manner of a spatial grid in the broadest sense.

In preferred embodiments, the air-permeable dust collector insert is permeable to air in all three spatial directions. However, embodiments are also possible in which the dust collector insert is permeable to air only in two spatial directions or only in one spatial direction. The limitation of the air permeability in certain spatial directions can be achieved in particular by appropriate macrostructure of the dust collector insert.

In preferred embodiments, the air-permeable dust collector insert is formed as a flexible and / or elastic, flat in the extended state, three-dimensional structure. Flexible means that the structure is not rigid, but at least partially movable. Elastic means that the structure resets itself, at least to a certain extent, after a relative movement of the parts which are movable relative to one another. Preferably, the dust collector insert is substantially extended in its ground state. In the flexible and / or elastic deformation, the dust collector insert can be deflected from its ground state. In the event that the dust catcher device is flexible-elastic, there is at least to a certain extent an independent provision. This flexible and / or elastic mobility, ie deformability of the dust collector insert is particularly favorable for optimal function of the dust collector insert. However, the dust collector insert can also be designed as a rigid three-dimensional structure. In this case, an air-permeable macrostructure of the three-dimensional structure is required for the air permeability. Both in the case that the dust collector insert is a flexible and / or elastic three-dimensional structure, as well as in the event that the dust collector insert is a rigid three-dimensional structure, it is advantageous if the structure has a flat basic configuration. In embodiments with flexible and / or elastic three-dimensional structure, the term "flat basic configuration" means that the structure is flat in the extended state. Flat means a substantially planar basic configuration with a relatively small thickness, ie dimension of the structure perpendicular to its surface extension. Here, in the extended state, the length of the surface extension is significantly greater than the dimension of the structure perpendicular to the surface extension. The structure is in the extended state, a flat, preferably cuboid body or a three-dimensional flat structure, ie a flat body with a small wall thickness.

In preferred embodiments, it is provided that the flat three-dimensional structure has a base area which is substantially the same size as a base surface of the dust filter bag opposite the inlet opening, ie. At least 90% of the inlet opening opposite base surface of the dust filter bag has.

According to the invention, it is provided that the flat three-dimensional structure has a base area which has a base area which is formed in the range between 50 to 90% of a base area of the dust filter bag opposite the inlet opening.

In particular, in embodiments in which the dust collector insert has a substantially rectangular, preferably square plan area, it may be advantageously provided that the three-dimensional structure has an edge length which is substantially the same size as an edge length of a base surface of the dust filter bag opposite the inlet opening, ie At least 90% of the edge length of the inlet opening opposite base surface of the dust filter bag.

The dust collector insert inserted into the interior of the dust filter bag can also have a spacer function for the bag walls. It can be provided that the dust collector insert is arranged in the interior of the dust filter bag so that it forms a spacer for opposite bag walls of the dust filter bag. This may also contribute to improved turbulence of the airflow entering the inlet port and / or improved flow around and dust deposition during operation of the dust filter bag. Embodiments are possible in which the dust collector insert is elastically deformable, it can preferably be provided that this elastic deformability enables a flat folding of the dust filter bag before use in the vacuum cleaner. This means that in this Vorbetriebsstellung before inserting the dust filter bag in the vacuum cleaner, the dust filter bag is well stackable and thus results in storage advantages. This flat foldability for storage is also obtained in embodiments with a relatively rigid dust collector insert when the rigid dust collector insert is a flat structure, as provided in the preferred embodiments.

In preferred embodiments of dust filter bags in which the air-permeable dust collector insert is formed as a flat three-dimensional structure, it is provided that the flat three-dimensional structure is formed of reticulated or slotted or perforated sheet material. Embodiments are also possible in which it is provided that the flat three-dimensional structure is formed as knitted fabric, woven fabric or fleece. Furthermore, embodiments are also provided in which the flat three-dimensional structure is designed as a three-dimensional grid or as a spacer knitted fabric or as a random knitted fabric or as a hollow profile or as a porous solid body. In all of these embodiments, the air permeability is realized due to the macrostructure of the three-dimensional structure forming the dust catcher liner.

Preferred embodiments in which the flat three-dimensional structure is formed as a slotted sheet, may provide that the flat three-dimensional structure is formed as a strip-shaped, slotted sheet having a first free edge and an opposite second free edge, wherein the strip-shaped fabric a first slot or a plurality of parallel slots extending at a distance from the first free edge to the second free edge or extend, wherein the slot or the slots extend to the second free edge and reach through this or at a distance from this end.

Similar in function and advantages are embodiments in which it is provided that the flat three-dimensional structure is formed as a slotted sheet having a plurality of slits extending from a common center radially to each other to form a cross-shaped or star-shaped slit configuration , In a preferred development it can be provided that the common center is formed as an opening, preferably with a circular edge contour.

Embodiments are also possible in which it is provided that the flat three-dimensional structure has a plurality of elongated, substantially strip-like or thread-like, mutually protruding sections or elements which are arranged overlapping and / or crossing each other and at least in pairs in overlapping or Intersection points are interconnected.

As regards the shape and arrangement of the dust collector insert relative to the design of the interior of the dust filter bag, advantageous embodiments are possible in which it is provided that the dust collector insert is arranged in the interior of the dust filter bag so that they at one or more locations of the bag wall under loose Contact is supported in the manner of a stop position.

Embodiments are provided in which only an air-permeable dust collector insert in the embodiment, as discussed above, is inserted in the interior of the bag. However, embodiments are also possible in which a plurality of such air-permeable dust collector inserts are arranged in the bag interior, ie in the bag interior two or more air-permeable dust collector inserts can be arranged in these embodiments, each of which alone are designed as described above and each alone to provide the respective functions and benefits. Combined with each other, combinatorial effects may occur that enhance certain benefits and functions. The plurality of air-permeable dust collector inserts can be arranged in the bag interior next to each other or one above the other, possibly only partially overlapping. You can relocate during operation relative to each other in the bag interior, as in embodiments with only an air-permeable dust collector insert is advantageous in the case of several air-permeable dust collector inserts an arrangement in the bag interior, in which the air-permeable dust collector insert is disposed opposite from the inlet opening, ie such that the air flow entering through the inlet opening impinges on the air-permeable dust collector insert.

In the case of several air-permeable dust collector inserts can also be provided in preferred embodiments that the stacked or partially overlapping dust collector inserts are arranged so that the dust collector inserts are at least partially flowed through by the incoming air flow successively, i. they are at least partially in the flow direction of the incoming air flow one behind the other.

The air-permeable dust collector insert may also be formed in non-patent versions of several individual elements considered alone, no or no sufficient function as an air-permeable dust catcher insert, but in their entirety constitute a three-dimensional air-permeable structure that acts as an air-permeable dust collector insert. Such embodiments may provide that the dust collector insert is formed as a plurality of loosely arranged, three-dimensional flat and / or elongated individual elements.

As far as the design of the individual elements is concerned, it can be provided in non-patented embodiments that the individual elements are permeable to air in only one spatial direction or in only two spatial directions or in all three spatial directions. Alternatively it can be provided that the individual elements are not permeable to air. In all these embodiments it can be provided that the individual elements are designed as flexible and / or elastic and / or rigid and / or porous structures.

Non-patented embodiments with dust collector inserts, which consist of a plurality of loosely arranged individual elements, can provide that the individual elements are formed as elongated, strip or thread-like elements that form the dust collector insert to form a spatial grid or tangled or tangled configuration.

Dust filter bags with air-permeable dust collector inserts arranged loosely in the interior of the bag can be designed as different types. Embodiments are possible in which it is provided that the dust filter bag is designed as a flat bag. In these embodiments, it is advantageous if the dust collector insert has a base area which corresponds in shape and / or size to the base area of the dust filter bag formed as a flat bag.

Embodiments are also possible in which the dust filter bag is designed as a block bottom bag. Here are embodiments of block bottom bag with one-sided and / or two-sided block bottom possible. In this case, the single-sided block floor or the two-sided block floor can each be assigned a separate dust collector insert, or it can also be provided only a common Staubfängereinlage, which cooperates with the one-sided and the two-sided block bottom.

Furthermore, embodiments are possible in which the dust filter bag is designed as a side-fold bag with attached side fold with a arranged in the bag interior Staubfängereinlage. There are also gusseted bag with unfortified gusset with arranged in the bag interior dust collector insert possible.

In the embodiments discussed above, it is always possible for the bag, i. the bag walls of conventional air-permeable filter material, e.g. Nonwoven fabric and / or paper are formed. The bag walls can be single-layered or multi-layered.

The material constituting the dust catcher liner may also be used as a baghouse conventional filter material. However, spunbonded nonwoven, carded nonwoven, carded nonwoven, airlaid and knitted fabric are particularly suitable for the dust collector insert. These materials alone or a combination of these materials can be used to form the dust collector liner. There are also pleated structures in question. Furthermore, in principle, embodiments are possible in which the primary function of the dust collector insert is directed to the spacer function. In these embodiments, it is primarily important that when inserted spacer air permeability is present by an air flow through the spacer or in the space between the spacer and the bag wall is possible. In the material design of the spacers also different materials can be used and a support structure for the dust collector insert can be created by appropriate materials in certain sections of the dust collector insert. It is also possible to design the dust collector insert in several parts with, for example, a skeleton or cage-like support structure.

As far as the air permeability of the air-permeable dust collector insert is concerned, in preferred embodiments it lies with an air permeability DIN EN ISO 9237, WSP 70.1 : between 100 to 10,000 l / m ² s, preferably between 1,000 and 3,000 l / m ² s.

The grammage of the air-permeable dust collector insert is in preferred embodiments in a grammage, DIN EN 29073-1, WSP 130.1 : between 30 and 400 g / m ² , preferably between 100 and 200 g / m ²

Concerning the thickness of the air-permeable dust collector insert in preferred embodiments, the thickness, DIN EN ISO 9073-2 , WSP 120.6 : between 0.5 to 50 mm, preferably 5 to 15 mm.

As far as the fiber diameter of the air-permeable dust collector insert is concerned, in preferred embodiments this is between 10 μm to 500 μm, preferably between 30 μm and 100 μm. The size ratio of the projected area of the dust collector insert to the total filter area is in preferred embodiments in a range of 10 to 50%, particularly preferably in a range of 20 to 30%.

• - die Materialstreifen sind beweglich zueinander ausgebildet;
• - die Materialstreifen sind übereinander und/oder zumindest abschnittsweise überlappend zueinander angeordnet;
• - die übereinander und/oder überlappenden Materialstreifen bzw. die nebeneinander benachbart angeordneten Materialstreifen weisen einen gegenseitigen Abstand auf;
• - die Breite der Materialstreifen ist kleiner oder gleich 50% der Breite der oberen Beutelwand im Falle des Flachbeutels bzw. der vorderseitigen Beutelwand im Falle des Blockbodenbeutels;
• - die länglich geformten Strömungsöffnungen sind schlitzförmig;
• - die länglich geformte(n) Strömungsöffnung(en) der Flächengebilde ist bzw. sind geradlinig ausgebildet;
• - die länglich geformten Strömungsöffnungen sind parallel nebeneinander angeordnet;
• - die länglich geformten Strömungsöffnungen sind unterschiedlich lang;
• - die länglich geformten Strömungsöffnungen sind in einer Rasteranordnung angeordnet;
• - die länglich geformte(n) Strömungsöffnung(en) ist bzw. sind mäander-förmig oder zick-zack-förmig verlaufend ausgebildet;
• - der Diffusor weist im Wesentlichen die gleiche Länge und/oder Breite wie die obere oder die untere Beutelwand im Falle des Flachbeutels bzw. wie die vorderseitige und/oder die rückseitige Beutelwand im Falle des Blockbodenbeutels auf;
• - der Diffusor ist schmäler und/oder kürzer ausgebildet als die obere oder die untere Beutelwand im Falle des Flachbeutels bzw. als die vorderseitige und/oder die rückseitige Beutelwand im Falle des Blockbodenbeutels;
• - der Diffusor weist eine größere Länge und/oder Breite als die obere und/oder die untere Beutelwand im Falle des Flachbeutels bzw. als die vorderseitige und/oder die rückseitige Beutelwand im Falle des Blockbodenbeutels auf und liegt gefaltet vor;
• - der Diffusor ist als Filamentbündel oder Bündel von Folienstreifen ausgebildet;
• - der Diffusor ist aus luftdurchlässigem Filtermaterial und/oder aus luftundurchlässigem Folienmaterial ausgebildet.

A further solution is the subject of claim 19. Yet another solution forms the subject of claim 21. Yet another solution forms the subject of claim 22. In preferred embodiments as specific specifications following design features alone or in combinations as and / or Combinations may be provided:

• - The strips of material are movable to each other;
• - The strips of material are arranged one above the other and / or at least partially overlapping each other;
• - The superposed and / or overlapping strips of material or adjacent juxtaposed strips of material have a mutual distance;
• the width of the strips of material is less than or equal to 50% of the width of the upper bag wall in the case of the flat bag or the front bag wall in the case of the block bottom bag;
• - The elongated flow openings are slit-shaped;
• - The elongated shaped (s) flow opening (s) of the fabrics is or are rectilinear;
• - The elongated flow openings are arranged parallel to each other;
• - The elongated flow openings are different lengths;
• - The elongated flow openings are arranged in a grid arrangement;
• - The elongated shaped (n) flow opening (s) is or are formed meander-shaped or zigzag-shaped running;
• the diffuser has substantially the same length and / or width as the upper or the lower bag wall in the case of the flat bag or like the front side and / or the rear bag wall in the case of the block bottom bag;
• the diffuser is narrower and / or shorter than the upper or the lower bag wall in the case of the flat bag or as the front side and / or the rear bag wall in the case of the block bottom bag;
• - The diffuser has a greater length and / or width than the upper and / or the lower bag wall in the case of the flat bag or as the front and / or the rear bag wall in the case of the block bottom bag and is present folded;
• - The diffuser is formed as a filament bundle or bundles of film strips;
• - The diffuser is made of air-permeable filter material and / or of air-impermeable film material.

• 1a eine Draufsicht auf das erste Ausführungsbeispiel des Staubfilterbeutels in 1d von oben;
• 1b eine Detailansicht aus 1a, die Staubfängereinlage zeigend;
• 1c eine Schnittansicht entlang Linie C-C in 1 b;
• 1d eine Schnittansicht eines ersten Ausführungsbeispiels eines Staubfilterbeutels, der als Flachbeutel ausgebildet ist, im Vorbetriebszustand, d.h. bevor der Staubfilterbeutel in den Staubsauger eingesetzt ist;
• 1e eine 1d entsprechende Schnittansicht des Staubsaugerfilterbeutels in 1d, jedoch im Betriebszustand, d.h. eingesetzt im Staubsauger während des Saugbetriebs;
• 1f und 1g entsprechende Schnittansichten wie 1e mit im Laufe des Betriebs variierenden Stellungen und Positionen der Staubfängereinlage;
• 2a eine Draufsicht auf ein zweites Ausführungsbeispiel des Staubfilterbeutels;
• 2b eine Detailansicht aus 2a, die Staubfängereinlage zeigend;
• 2c eine Schnittansicht entlang Linie C-C in 2b;
• 3a eine Draufsicht auf ein drittes Ausführungsbeispiel des Staubfilterbeutels;
• 3b eine Detailansicht aus 3a, die Staubfängereinlage zeigend;
• 3c eine Schnittansicht entlang Linie C-C in 3c;
• 4a eine Draufsicht auf ein viertes Ausführungsbeispiel des Staubfilterbeutels;
• 4b eine Detailansicht aus 4a, die Staubfängereinlage zeigend;
• 4c eine Schnittansicht entlang Linie C-C in 4c;
• 5a eine Draufsicht auf ein fünftes Ausführungsbeispiel des Staubfilterbeutels;
• 5b eine Detailansicht aus 5a, die Staubfängereinlage zeigend;
• 5c eine Schnittansicht entlang Linie C-C in 5c;
• 6a eine Draufsicht auf ein sechstes Ausführungsbeispiel des Staubfilterbeutels;
• 6b eine Detailansicht aus 6a, die Staubfängereinlage zeigend;
• 6c eine Schnittansicht entlang Linie C-C in 6c;
• 7a eine Draufsicht auf ein siebtes Ausführungsbeispiel des Staubfilterbeutels;
• 7b eine Detailansicht aus 7a, die Staubfängereinlage zeigend;
• 7c eine Schnittansicht entlang Linie C-C in 7c;
• 8a eine Draufsicht auf ein achtes Ausführungsbeispiel des Staubfilterbeutels;
• 8b eine Detailansicht aus 8a, die Staubfängereinlage zeigend;
• 8c eine Schnittansicht entlang Linie C-C in 8c;
• 9a eine Draufsicht auf ein neuntes Ausführungsbeispiel des Staubfilterbeutels;
• 9b eine Detailansicht aus 9a, die Staubfängereinlage zeigend;
• 9c eine Schnittansicht entlang Linie C-C in 9c;
• 10a eine Draufsicht auf ein zehntes Ausführungsbeispiel des Staubfilterbeutels;
• 10b eine Detailansicht aus 10a, die Staubfängereinlage zeigend;
• 10c eine Schnittansicht entlang Linie C-C in 10c;
• 11a eine Draufsicht auf ein elftes Ausführungsbeispiel des Staubfilterbeutels;
• 11b eine Detailansicht aus 11a, die Staubfängereinlage zeigend;
• 11c eine Schnittansicht entlang Linie C-C in 11c;
• 12 Prüfprotokoll mit Kennlinie des Volumenstroms q [l/s] über der Beladung mit Prüfstaub DMT Typ 8 [g] aus drei Vergleichsmessreihen;
  • Messreihe E: unter Einsatz eines erfindungsgemäßen Staubfilterbeutels mit lose eingelegter Staubfängereinlage (Messpunkte E)
  • Messreihe B: unter Einsatz eines Staubfilterbeutels mit an der Beutelwand befestigtem Diffusor (Messpunkte B)
  • Messreihe O: unter Einsatz eines Staubfilterbeutels ohne Diffusor (Messpunkte O)

Exemplary embodiments are explained below with reference to figures. Show

• 1a a plan view of the first embodiment of the dust filter bag in 1d from above;
• 1b a detailed view 1a showing the dust collector insert;
• 1c a sectional view taken along line CC in 1 b ;
• 1d a sectional view of a first embodiment of a dust bag, which is designed as a flat bag, in the pre-operating state, ie, before the dust filter bag is inserted into the vacuum cleaner;
• 1e a 1d corresponding sectional view of the vacuum cleaner filter bag in 1d , but in the operating state, ie used in the vacuum cleaner during the suction operation;
• 1f and 1g corresponding sectional views as 1e with varying positions and positions of the dust collector liner during operation;
• 2a a plan view of a second embodiment of the dust filter bag;
• 2 B a detailed view 2a showing the dust collector insert;
• 2c a sectional view taken along line CC in 2 B ;
• 3a a plan view of a third embodiment of the dust filter bag;
• 3b a detailed view 3a showing the dust collector insert;
• 3c a sectional view taken along line CC in 3c ;
• 4a a plan view of a fourth embodiment of the dust filter bag;
• 4b a detailed view 4a showing the dust collector insert;
• 4c a sectional view taken along line CC in 4c ;
• 5a a plan view of a fifth embodiment of the dust filter bag;
• 5b a detailed view 5a showing the dust collector insert;
• 5c a sectional view taken along line CC in 5c ;
• 6a a plan view of a sixth embodiment of the dust filter bag;
• 6b a detailed view 6a showing the dust collector insert;
• 6c a sectional view taken along line CC in 6c ;
• 7a a plan view of a seventh embodiment of the dust filter bag;
• 7b a detailed view 7a showing the dust collector insert;
• 7c a sectional view taken along line CC in 7c ;
• 8a a plan view of an eighth embodiment of the dust filter bag;
• 8b a detailed view 8a showing the dust collector insert;
• 8c a sectional view taken along line CC in 8c ;
• 9a a plan view of a ninth embodiment of the dust filter bag;
• 9b a detailed view 9a showing the dust collector insert;
• 9c a sectional view taken along line CC in 9c ;
• 10a a plan view of a tenth embodiment of the dust filter bag;
• 10b a detailed view 10a showing the dust collector insert;
• 10c a sectional view taken along line CC in 10c ;
• 11a a plan view of an eleventh embodiment of the dust filter bag;
• 11b a detailed view 11a showing the dust collector insert;
• 11c a sectional view taken along line CC in 11c ;
• 12 Test report with characteristic of the volume flow q [l / s] above the load with test dust DMT type 8th [g] from three comparative measurement series;
  • Measurement series E: using a dust filter bag according to the invention with loosely inserted dust collector insert (measuring points E)
  • Measurement series B: using a dust filter bag with diffuser attached to the bag wall (measuring points B)
  • Measurement series O: using a dust filter bag without diffuser (measuring points O)

In the in the 1a to 1g illustrated first embodiment is a formed as a flat bag dust filter bag 1 for use in a vacuum cleaner, not shown. The dust filter bag 1 has an upper bag wall 2o and a lower bag wall 2u on. The bag walls 2o . 2u are made of air-permeable filter material. Both bag walls 2o . 2u have rectangular contour. The two rectangular areas are equal and congruent. The upper bag wall 2o has at its center an inlet opening 3 on. At the bag wall 2o is on the outside in the area around the inlet opening a holding plate 4 arranged. The holding plate 4 has one Inlet opening with the inlet opening 3 in the bag wall 2o axially aligned and coincides with this. The upper bag wall 2o is with the bottom bag wall 2u at the edge over a circumferential weld 5 connected. The bag walls 2o . 2u thus form the dust filter bag 1 , In the interior between the upper bag wall 2o and the lower bag wall 2u the interior of the dust filter bag is formed. In the interior is loose a dust collector insert 7 arranged. This dust collector insert 7 is executed differently in the embodiments illustrated in the figures. The different embodiments will be explained in more detail with reference to FIGS.

The trained as a flat bag dust filter bag 1 is in 1d in its Vorbetriebszustand, ie before it is inserted into the receiving space of the vacuum cleaner, folded flat. In this state are the upper bag wall 2o and the bottom bag wall 2u with intervening dust collector insert 7 on each other in a common plane. This Vorbetriebszustand before insertion into the vacuum cleaner shows 1d ,

In operating condition, ie when the dust filter bag 1 Used in the vacuum cleaner, is about the suction pressure applied to the bag walls 2u . 2o acts, sucked through a suction pipe of the vacuum cleaner dust-laden air. As a result, the dust filter bag is inflated in the operating state. This operating condition with inflated filter bag is in the 1e . 1f and 1g shown. It can be seen that during the suction operation in the interior of the dust filter bag loosely inserted dust collector insert 7 varying positions and in the illustrated embodiment, wherein the dust collector insert 7 flexible, can also take on varying shape configurations during operation.

The dust collector insert 7 is loosely inserted, ie it is at no point with the bag wall 2o . 2u connected. It is designed as a flat three-dimensional structure. Flat means that the structure in the case shown is a flat structure with only a small wall thickness. The flat structure 7 is in the in the 1e . 1f and 1g shown embodiment flexible, so that the sheet-like structure 7 not only different positions during operation, but also different shape configurations can take. The dust collector insert 7 is permeable to air. During the suction operation, this causes a turbulence of the through the inlet opening 3 entering dust-laden airflow. The dust particles of the dust collector insert 7 flowing air collect at the from the inlet port 3 opposite side of the dust collector insert 7 , The flat, flexible, air-permeable dust collector insert 7 acts like a sail. Depending on the flow and loading conditions in the interior of the dust filter bag 1 it can take a largely stretched shape configuration as in 1e shown. However, it can also be configured more or less rolled up, as in the 1f and 1g shown. Also their position in the bag interior can vary from largely symmetrical arrangement parallel to the upper and lower bag wall 2o . 2u , as in 1e shown, to more or less asymmetric, eccentric and / or angular arrangements, such as 1g shows. Dust deposition occurs primarily on the inlet port 3 opposite side of the dust collector insert 7 . d .H. The dust particles settle and collect primarily in the space between the dust collector insert 7 and the lower bag wall 2u , This dust deposit is in the 1e . 1f and 1g clearly visible.

The dust collector insert 7 is in the first embodiment, as shown in the illustration of 1a . 1b . 1c can be seen formed as a rectangular blank of a sheet material layer. The thickness of the material layer corresponds approximately to the thickness of the bag wall 2o . 2u , In the flat blank, the dust collector insert 7 forms are in this embodiment, as the 1a . 1b and 1c show parallel slots 7s educated. The slots 7s extend between two opposite edges 7a . 7b parallel to the other two opposite edges 7c . 7d the rectangular, in the illustrated embodiment square blank 7 , The slit ends of the slots 7s cut the edges 7a . 7b but not, ie the slots 7s each end at a small distance to the edges 7a . 7b , The distance in the illustrated embodiment corresponds approximately to the width of a strip 7p that is between two adjacent slots 7s is formed. This results in that the cut 7 forming the dust collector insert, having a peripheral contiguous frame passing through slots 7s not severed. The one of the parallel slots 7s interspersed cutting 7 thus receives a stabilization, which holds the slotted fabric edge together.

The cut 7 can be single-layered or multi-layered. It can also be several cuts 7 be arranged one above the other and thus be formed a plurality of layers. These blanks can be identical and can be arranged flush with each other congruent or only partially overlapping. But the blanks can also be designed differently, for example, have different size with different contour or different structure. The blanks can each have an edge, for example in the region of the edge 7b be connected to each other. However, it is also possible to cut the blanks on both edges, eg in the area of the edges 7a and 7b to connect with each other.

The second embodiment, in the 2a . 2 B . 2c is different from the first embodiment of the 1a . 1b . 1c in that the slots 7s the edge 7b cut through, ie the slots 7s extend through the edge 7b therethrough. In this embodiment, therefore, has the blank that the dust collector insert 7 forms, no rectangular or square, frame-like closed edge area for stabilization. Only on the edge 7a from which the slots 7s assume a contiguous strip-shaped edge region is present, which connects the slots in this area. The opposite free area of the slots has greater freedom of movement, so that the strips formed by the slots 7p With their free end portions free relative movements in all three directions can perform.

Also in this embodiment, the blank forming the dust collector insert can be formed in one or more layers, and several identical or differently shaped blanks can be arranged one above the other. The same applies as in this case to the first exemplary embodiment of FIG 1a . 1b . 1c discussed. The blanks lying one above the other can preferably be connected to one another in the region of the common edge at 7a, for example flat or over a weld seam or the like.

The third embodiment, which in the 3a . 3b . 3c is different from the second embodiment discussed above 2a . 2 B . 2c in that the dust collector insert 7 by completely separated strips 7p is formed. The Stripes 7p are designed as separate individual elements. Their arrangement with each other is random. In non-patented embodiments is provided: Due to the flow and pressure conditions in the interior of the filter bag results in a substantially flat during operation, from the strips 7p formed, composite, three-dimensional structure. The flat design of the dust collector insert 7 performing entity is also determined by the surface design of the inner wall of the interior of the filter bag, which is designed as a flat bag, co-determined. The Stripes 7p may be formed of air-permeable but also of air-impermeable material. The material can be chosen so that the stripes 7p adhere to one another to some extent. The Stripes 7p may be formed in particular for this purpose from different, matched material.

In a patent modification of the in the 3a . 3b . 3c illustrated embodiment, the strip-shaped individual elements 7p also point-wise in certain overlapping and crossing areas with each other materially, for example, be connected by adhesive or welding, so that a coherent, three-dimensional, grid-like structure is obtained.

For the embodiment of 3a . 3b . 3c and for the described modification with pointwise joints between the strips 7p applies that the strip-shaped elements 7p optionally be formed of the same material as the blank 7 in the first embodiment of 1a . 1b . 1c or in the second embodiment of 2a . 2 B . 2c , It may be air-permeable material, such as a nonwoven. However, the material can also be impermeable to air. The air permeability of the dust collector insert 7 results in the execution of airtight material then only from the macrostructure of the structure, ie due to the slots 7s in the case of the first and second embodiments and due to the random grid structure in the third embodiment.

The fourth embodiment, which in the 4a . 4b . 4c is different from the third embodiment of the 3a , 3b, 3c therein that instead of the separate strips of material 7p separate, ie individual material rings 7r provided in their entirety the dust collector insert 7 form. The Rings 7r can also be formed from material blank. However, they can also be formed in other ways, eg by punching. In the case shown, the rings 7r designed as circular rings. However, there are also modified versions as oval rings or as rings with angular outline contour possible. In a corresponding manner, as in connection with the third embodiment of the 3a . 3b . 3c discussed in the embodiment of the 4a . 4b . 4c the rings may be formed loosely in embodiments not patented and but also be connected to each other in overlapping patented design at overlapping and crossing points, so that there is a coherent lattice-like structure of the ring elements.

The fifth embodiment, in the 5a . 5b . 5c is different from those associated with the 3a . 3b . 3c and the 4a . 4b . 4c discussed embodiments in that the Dust catches inlay 7 is formed of a random fiber web in 3D arrangement, a so-called spacer knitted fabric. This is a random fiber fleece made of plastic threads 7f , eg polypropylene threads. These can be designed to be elastic or rigid and can be connected to one another in a point-wise cohesive manner in a grid-like, three-dimensional arrangement. Due to its coil structure, this structure has fundamental lattice-like properties. That in the 10a . 10b . 10c Wirrfaservlies shown may consist of a sheet material, such as spunbonded, which has been brought by mechanical processing in a 3D shape, such as pleating or deep drawing.

The sixth embodiment, in the 6a . 6b . 6c is different from the first embodiment of the 1a . 1b . 1c in that as a dust collector insert 7 instead of a slotted material blank a perforated material blank is used, the holes 7l are arranged in a grid of holes, in which the holes 7l are arranged equidistantly spaced apart in parallel horizontal and vertical rows. The holes 7l in the embodiment of the 6a . 6b . 6c are formed as holes with circular contour. However, modified versions are possible in which the holes may have any contour, ie out of round, eg oval or square. It is possible to form the holes, as in the case shown, in a uniform grid as identical holes or else irregular, possibly with different hole shapes.

In the 7a . 7b . 7c , the 8a . 8b . 8c and the 9a . 9b . 9c show three embodiments, ie, a seventh, an eighth and a ninth embodiment, in which the dust collector insert 7 is designed as a three-dimensional grid. The grid is each made of separate strips 7p formed, which are arranged to the lattice structure and are interconnected in their intersection and overlap points cohesively. In the seventh embodiment in the 7a . 7b . 7c is the dust collector insert 7 formed as an orthogonal rust-like lattice structure in which the strips 7p arranged in vertical rows next to each other at a constant distance in a plane and resting thereon strips 7p are arranged in horizontal corresponding spaced rows crossing the vertical rows. In the overlapping crossing areas are the vertical stripes 7p with the horizontal stripes 7p connected to each other cohesively, for example by welding or gluing.

In the eighth embodiment incorporated in the 8a . 8b . 8c shown is the dust collector insert 7 also formed as an orthogonal rust-like lattice structure. In this case, the dust collector insert formed by the grid structure 7 in its plan shape and size with respect to the bottom surface of the dust filter bag unlike in the seventh embodiment in the 7a . 7b . 7c educated. While in the seventh embodiment, the lattice-like Staubfängereinlage 7 in its layout essentially corresponds to the base of the dust filter bag, that is, the edge length of the square in the dust collector insert 7 is only slightly smaller than the edge lengths of the base surface of the dust filter bag is in the embodiment in the 8a . 8b . 8c the floor plan area of the grid-like dust collector insert 7 much smaller. In 8a It can be seen that the length of the diagonal of the square footprint of the dust collector insert 7 the edge length corresponds to the base area of the dust filter bag. This gives the dust filter bag loosely arranged in the dust filter bag greater freedom of movement. In 6a is the dust collector insert 7 with its base area offset by 45 degrees with respect to the base of the dust filter bag.

That in the 9a . 9b . 9c illustrated ninth embodiment differs from that in the 7a . 7b . 7c illustrated seventh embodiment in that the grid structure of the dust collector insert 7 is not an orthogonal lattice structure, but a skewed lattice structure.

In the tenth embodiment, in the 10a . 10b . 10c shown is the dust collector insert 7 formed as a sheet with profile cross-section. This hollow-profile sheet is made of adjacent interconnected tubes 7n educated. In the case shown, the tubes are 7n formed with identical circular circular cross-section. However, the tubes may also have a cross-section deviating in cross-section, for example out-of-round, angular or the like. Adjacent tubes 7n can also have different diameters. The hollow profile may be formed as an extruded profile with tube axes running along the extruded profile direction. The air permeability of this dust collector insert 7 the 10a . 10b . 10c is due to the structure of the adjacent tubes 7n oriented in one direction, in the axial direction of the tubes 7n , In the event that the tubes 7n are themselves formed of air-permeable material, results in an overlay with the present in three spatial directions air permeability of the material.

The eleventh embodiment, which is in the 11a . 11b . 11c is different from the tenth embodiment discussed above 10a . 10b . 10c in that the dust collector insert in this case as a hollow profile with parallel hollow chambers 7h is trained. The hollow profile may also be formed as an extruded profile, wherein the hollow chambers 7h extend along the extrusion direction.

LIST OF REFERENCE NUMBERS

1

Vacuum Cleaner Bags

2u

lower bag wall

2o

upper bag wall

3

inlet port

4

retaining plate

5

circumferential weld

7

Dust catches inlay

7s

slot

7a, 7b

parallel opposite edges

7c, d

parallel opposite edges

7p

strips of material

7r

material rings

7l

holes

7n

roar

7h

hollow chambers

7f

Synthetic thread

7n

Tube of the tube profile

Claims (22)

Dust filter bag for use in a vacuum cleaner, with a one-layer or multi-layer bag wall (2o, 2u) which forms the outside of the dust filter bag (1) and which is formed, at least in sections, from air-permeable filter material, - A bag interior, which is directly or indirectly enclosed by the bag wall, and - An inlet opening (3) formed in the bag wall, wherein is provided: - That in the bag interior an air-permeable dust collector insert (7) or more air-permeable dust collector inserts (7) is arranged loosely or are; and - That the loose arrangement is formed such that the air-permeable dust collector insert (7) at any point a permanent connection with the bag wall (2o, 2u) or a connected to the bag wall (2o, 2u) component of the dust filter bag, and - That the air-permeable dust collector insert (7) is formed as a flexible and / or elastic in the extended state flat three-dimensional structure or as a rigid flat three-dimensional structure, wherein the three-dimensional structure is formed as a flat body, and - That the flat three-dimensional structure (7) is formed of net-like or slotted or perforated sheet material, and - That the flat three-dimensional structure has a base surface whose surface area is at a value in the range between 50 to 90% of the inlet opening (3) opposite the base surface of the dust filter bag (1). Dust filter bag after Claim 1 , characterized in that the flat three-dimensional structure (7) is formed as a strip-shaped, slotted sheet having a first free edge (7a) and an opposite second free edge (7b), the strip-shaped sheet (7) having a first slot (7s) or a plurality of parallel slots (7s) extending at a distance from the first free edge (7a) to the second free edge (7b), the slot (7s) and the slots, respectively (7s) extend to the second free edge (7b) and reach through or at a distance from this end. Dust filter bag after Claim 1 or 2 , characterized in that the flat three-dimensional structure (7) is formed as a slotted sheet having a plurality of slits (7s) extending radially from each other from a common center to form a cross-shaped or star-shaped slit configuration. Dust filter bag according to one of the preceding claims, characterized in that the flat three-dimensional structure (7) is formed as a knitted fabric or non-woven fabric. Dust filter bag according to one of the preceding claims, characterized in that the flat three-dimensional structure (7) is designed as a three-dimensional grid or as a spacer knitted fabric or as a random knitted fabric or as a hollow profile or as a porous solid body. Dust filter bag according to one of the preceding claims, characterized in that the air-permeable dust collector insert (7) is permeable to air in only one spatial direction or in only two spatial directions or in all three spatial directions. Dust filter bag according to one of the preceding claims, characterized in that the flat three-dimensional structure is formed in one or more layers or that several flat three-dimensional structures are arranged one above the other. Dust filter bag after Claim 7 , characterized in that superimposed layers or superimposed flat three-dimensional structures are connected to each other at least in a common edge region and / or at least in a common overlapping central region. Dust filter bag according to one of the preceding claims, characterized in that the flat three-dimensional structure (7) has a base area which is substantially the same size as one of the inlet opening (3) opposite base surface of the dust filter bag (1), ie at least 90% of the inlet opening (3) opposite base surface of the dust filter bag (1). Dust filter bag according to one of the preceding claims, characterized in that the three-dimensional structure (7) has an edge length which is substantially the same size as an edge length of one of the inlet opening (3) opposite base surface of the dust filter bag (1), ie at least 90% of Edge length of the inlet opening (3) opposite the base surface of the dust filter bag (1). Dust filter bag after one of Claims 3 to 10 , characterized in that the common center is formed as an opening, preferably with a circular edge contour. Dust filter bag according to one of the preceding claims, characterized in that the flat three-dimensional structure has a plurality of elongate, substantially strip-like or thread-like, protruding sections (7p) or elements which are arranged overlapping and / or crossing one another and at least in pairs in overlapping or crossing points are connected to each other. Dust filter bag according to one of the preceding claims, characterized in that the dust collector insert (7) in the interior of the dust filter bag (1) is arranged so that it forms a spacer for opposite bag walls (2o, 2u) of the dust filter bag. Dust filter bag according to one of the preceding claims, characterized in that the dust collector insert (7) is arranged in the interior of the dust filter bag so that it is supported at one or more locations of the bag wall (2o, 2u) under loose contact. Dust filter bag according to one of the preceding claims, characterized in that the dust filter bag (1) is designed as a flat bag. Dust filter bag after Claim 15 , characterized in that the dust filter bag (1) is designed as a flat bag with ausstülpbarer gusset or ausstülpbaren gussets. Dust filter bag according to one of the preceding claims, characterized in that the dust filter bag (1) is designed as a side-fold bag. Dust filter bag according to one of the preceding claims, characterized in that the dust filter bag (1) is designed as a block bottom bag. Dust filter bag for use in a vacuum cleaner, according to one of the preceding claims, wherein it is provided a) that the dust filter bag is formed as a flat bag, b) that the flat bag has an upper bag wall and a lower bag wall, c) that the upper bag wall and the lower D) that an inlet opening for the air to be filtered is introduced in the upper bag wall, e) that inside the flat bag at least one dust collector insert is arranged, which forms an intermediate plane between the upper bag wall and the lower bag wall, and / or that in the interior of the flat bag between the upper bag wall and the lower bag wall in an intermediate plane at least one dust collector insert is arranged, f) that the at least one dust collector insert made of air-permeable or air-impermeable material is formed as a diffuser, the at least two zueinande r arranged individual strips of material and / or sheet-like material structures having elongated flow openings or consists of only a flat material structure having at least one elongated flow opening, characterized in that g) that the at least one diffuser is not connected to the bag wall. Dust filter bag after Claim 19 , characterized in that the at least one diffuser is arranged in only a single intermediate plane. Dust filter bag for use in a vacuum cleaner, according to one of the preceding claims, wherein it is provided a) that the dust filter bag is formed as a flat bag, b) that the flat bag has an upper bag wall and a lower bag wall, c) that the upper bag wall and the lower bag wall are formed from air-permeable filter material, d) that in the upper bag wall an inlet opening for the air to be filtered is introduced, e) that at least one dust collector insert is provided in the interior of the flat bag below the upper bag wall in at least one first plane, and / or that in the interior of the dust filter bag between the first plane and the lower bag wall in at least one further plane at least one further dust collector insert is provided, f) that the at least one dust collector insert of the first level and the at least one further dust collector insert the further level each of air permeable material and / or luftundurchlässigem material is formed as a diffuser and, the diffuser of at least two zuein other arranged individual strips of material and / or sheet-like material structures having elongated flow openings or consists of only a sheet-like material structure having at least one elongated flow opening, characterized in that g) that the diffusers are not connected to the bag wall. Dust filter bag for use in a vacuum cleaner, according to one of the preceding claims, wherein it is provided a) that the dust filter bag is designed as a block bottom bag, b) that the block bottom bag a front side bag wall and a rear bag wall and a front side bag wall and the rear bag wall spaced block bottom c) that the front-side bag wall, the rear bag wall and the block bottom are formed from air-permeable filter material and / or the bag wall of air-permeable filter material, d) that in the front bag wall or the block bottom an inlet opening for the air to be filtered is introduced, e) that in the interior of the block bottom bag at least one dust collector insert is arranged, f) that the at least one dust collector insert made of air-permeable material and / or made of air-impermeable material as a diffuser ausgebil Is det, which consists of at least two mutually arranged individual strips of material and / or sheetlike material structures having elongated flow openings or consists of only a sheet-like material structure having at least one elongated flow opening, characterized in that g) that the at least one diffuser is not connected to the bag wall.

Images