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WO2010000453A1 - Sac filtrant constitué d'un sac extérieur et d'un sac intérieur et utilisable dans un aspirateur - Google Patents

Sac filtrant constitué d'un sac extérieur et d'un sac intérieur et utilisable dans un aspirateur Download PDF

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Publication number
WO2010000453A1
WO2010000453A1 PCT/EP2009/004737 EP2009004737W WO2010000453A1 WO 2010000453 A1 WO2010000453 A1 WO 2010000453A1 EP 2009004737 W EP2009004737 W EP 2009004737W WO 2010000453 A1 WO2010000453 A1 WO 2010000453A1
Authority
WO
WIPO (PCT)
Prior art keywords
grid
bag
wall
inner bag
openings
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2009/004737
Other languages
German (de)
English (en)
Inventor
Herbert Krehan
Andrej Korobov
Uwe Schmierer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Branofilter GmbH
Original Assignee
Branofilter GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE102008031989A external-priority patent/DE102008031989A1/de
Priority claimed from DE200810031988 external-priority patent/DE102008031988B3/de
Priority claimed from DE200910009152 external-priority patent/DE102009009152A1/de
Priority claimed from DE200910009154 external-priority patent/DE102009009154A1/de
Application filed by Branofilter GmbH filed Critical Branofilter GmbH
Publication of WO2010000453A1 publication Critical patent/WO2010000453A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/14—Bags or the like; Rigid filtering receptacles; Attachment of, or closures for, bags or receptacles

Definitions

  • the invention relates to a filter bag for use in a vacuum cleaner comprising an outer bag and an inner bag disposed therein.
  • the term vacuum cleaner is understood to mean conventional vacuum cleaners, but also vacuum cleaners in a broader sense, insofar as they represent dirt and dust-sucking devices.
  • US 3,479,802 describes such a filter bag.
  • the inner bag and the outer bag are formed of identical or similar filter material.
  • the inner bag serves as a pre-filter for the first coarse separation, the outer bag is used for fine dust separation.
  • this inner bag and outer bag filter bag described in the US document does not give satisfactory results in practice because the inner bag quickly becomes clogged, thus reducing the life of the entire bag filter.
  • a multi-chamber filter bag with a first chamber and a second chamber is described.
  • the first chamber is formed as an inner bag and the second chamber as an outer bag.
  • the inner bag has one or more bypass openings through which the air flowing into the inner bag after a deflection in the inner bag is transferred to the outer bag.
  • the inner bag is used in this and in the other embodiments described in the document in each case for deflecting the air flow, wherein due to the inertia of a cyclone-like dust separation takes place. This in itself improves the characteristic and the service life of the filter bag. However, an optimum characteristic curve with a sufficiently long service life is not obtained.
  • the invention has for its object to develop a filter bag, which has an improved characteristics and increased life.
  • the inner bag is formed of grid material and having outlet openings which are formed as a continuous grid screen openings of the mesh material of the inner bag. It is essential that the air entering the inner bag enters the free interior of the outer bag via the outlet openings formed in the grid material and then exits via the wall of the outer bag formed of filter material, the air permeability of the inner bag being greater than that of the bag made of filter material outer bag. It has been found that the majority of the particles and fibers in the inner bag are retained by the grid material. Only a portion of the particles and fibers pass through the grid and in turn form a pre-filter on the filter material wall of the outer bag, without prematurely taking place an adverse compression of the fibers and particles on the pre-filter.
  • various grid materials z As mesh, fabric, knitwear, extruded tubing, extruded tubing, extruded tubular mesh or perforated or perforated material, preferably such film or foam material may be formed. It can be provided in this case that the material of the grid material as such is impermeable to air or formed as a non-filter material. The material may be formed, for example, as an air-impermeable film.
  • the film can be perforated, perforated or slotted, creating a
  • Grid structure is formed and the perforation, the perforation or the slit forms the outlet openings.
  • the air permeability of the wall of the inner bag can be over 6500 l / ms 2 according to DIN 53887. In preferred embodiments, it may be provided that the air permeability of the wall of the inner bag is at least 10 times as large as the air permeability of the wall of the outer bag. It should be noted that this air permeability of the walls is present in the unfilled initial state of the filter bag. Due to the layer of dust, sand and fibers depositing on the walls during the operating time of the filter, a pre-filter is formed, which reduces the effective air permeability of the walls.
  • the grid size of the grid-like material can be tailored to the dust.
  • Embodiments are possible in which the grid grid openings or the outlet openings of the inner bag are designed to be matched to DMT 8 test dust.
  • a determining factor in the use of grid material for the wall of the inner bag is the ratio of the grid grid area to clear surface of the grid opening.
  • This quotient is a measure that identifies the grid of the grid material. This measure is based on the grid grid openings being arranged in the grid such that a plurality of grid grid openings are arranged in groups adjacent to each other around an associated grid grid point and the grid grid point is respectively the area centroid of the grid grid associated with these grid grid openings Surface forms, wherein the grid grid surface is enclosed by the connecting lines of the centroids of the associated juxtaposed grid grid openings.
  • the parameters determining the sizes are thus the grid grid openings and the grid grid area, which are defined in the above manner.
  • FIG. 10 clearly shows such a lattice structure.
  • the grid structure is constructed in the illustrated case so that in each case four grid screen openings 10ö are arranged in groups adjacent to one another around an associated grid grid point 10p.
  • the grating surface 10f is the surface enclosed by the connecting lines of the centroids 10o of the associated four adjacent grating openings 10o.
  • the connecting lines between the centroids 10öS are each formed as a straight line.
  • the grid screen openings 10ö are each formed as diamond-shaped surfaces. They form in the grid in each case the clear surface of the outlet openings 3f of the wall of the inner bag. Due to the lattice structure, the lattice grid openings 10ö and thus the outlet openings 3f are arranged in the wall of the inner bag in the grid of the lattice structure.
  • the characteristic value that is to say the ratio value of the grid surface to the clear surface of the grid grid opening 10ö of the grid material used for the wall of the inner bag, lies in the range greater than 1 and smaller than 3.
  • the range between 1.01 and 2.5 is preferred.
  • particularly good results are obtained when the ratio is chosen in the range between 1.2 and 1.5.
  • the grid openings are so large in the designs that they are consistent for particles with a diameter of less than or equal to 9 mm.
  • the grid grid areas in the grid material are the same size. Further, embodiments are preferred in which the grid screen openings are formed in the grid material of equal size. In particularly preferred embodiments, both the grid grid surfaces are each the same size and the grid grid openings are each formed the same size.
  • grid materials are provided for use, in which differently sized and / or differently shaped grid grid surfaces are arranged in the grid material or in which differently sized and / or differently shaped grid grid openings are arranged in the grid material.
  • the grid is preferably uniform in that the size and / or shape of the grid grid areas and / or the size and / or shape of the grid grid Grating openings are formed in a periodic and / or average repetitive pattern.
  • an average ratio of the grid grid area to the clear area of the grid grid opening can then be specified by using averages for the grid grid area and the grid grid opening.
  • the size and / or the shape of the grid screen openings are made variable depending on the pressure conditions and / or the degree of filling of the inner bag and / or the outer bag.
  • this is feasible in grid materials, in which the grid material of an elastic and / or slotted material, preferably a slotted foil, is formed, wherein the slots in adjacent rows of slots can preferably be arranged offset to one another.
  • the preferably closed in the initial state closed slots to form the grid grid openings open as the outlet openings for the escape of air from the interior of the inner bag into the free interior of the outer bag.
  • the lattice grid openings then close, as far as possible, automatically again as soon as the pressurization is reduced or discontinued or the degree of filling is correspondingly reduced.
  • the slotted material is particularly simple and inexpensive to manufacture.
  • the longitudinal slots can be designed as simple longitudinal slots in the material. With the grid arrangement of the slots, a regular arrangement of preferably parallel slots is obtained.
  • the slots may be arranged in parallel rows of slots.
  • the slit material in operation under the influence of the pressure and degree of filling of the bag accordion-like in the direction transverse to the longitudinal extent of the slots be pulled apart, thereby forming enlarged slot openings.
  • the shape of the slot openings becomes substantially quadrangular, preferably kite-shaped or diamond-shaped, the two slot ends of the slot forming acute-angled corner areas and the other two opposite corner areas being rounded at an obtuse angle.
  • the accordion character due to the slit gives the slit material, which as such may be made of an inextensible material, a special elasticity. Depending on the pressure conditions and / or the degree of filling in the dust filter bag, this is accordion-like
  • the slits can thus open or close automatically under the action of the pressure and / or the degree of filling, whereby the slit material moves apart in an accordion-like manner or moves relative to one another.
  • the concertina-like movement apart of the slotted material results in the walls between the enlarging slot openings twisting to form manhole or slot-like wall areas around the slot openings.
  • air flow through the slot openings is achieved.
  • turbulences in the air may occur, which is advantageous for the filter effect and service life.
  • the slotted material from a preferably air-impermeable film or other airtight material z. B. foam material is formed, it being particularly advantageous if the material is elastic, z. B. as a rubber sheet is formed, so that the opening and closing operation described reversibly and automatically adjusts.
  • the slotted material has slotted and non-slit panels, with the slotted panels between the slotted panels.
  • the sections may be formed without slitting as over the entire wall continuous web-like fields.
  • These land-like fields can run in the X direction or in the Y direction.
  • they can also be designed as cross-shaped land-like fields in the X direction and as web-like fields in the Y direction. They can be crossed in a right-angled pattern or crossed in another pattern, e.g. B. formed in a diamond-shaped pattern crossing.
  • the volume of the inner bag is smaller than the volume of the outer bag.
  • the volume that the inner bag includes may range from 35% to 95%, preferably 60% to 90%, in particular 70% to 85% of said volume, which encloses the outer bag. This named volume corresponds to the volume of said filter bag.
  • the area of the wall of the inner bag is 5% to 30% smaller than the area of the wall of the outer bag.
  • a holding plate is provided in the region of the inlet opening and / or around the inlet opening, to which the outer bag and / or the inner bag is fastened, preferably adhesively bonded or welded.
  • the inner bag and / or the outer bag is formed of at least two walls which are interconnected in their edge region, wherein in the space between the Walls of the interior of the inner bag or the interior of the outer bag is formed.
  • the inner bag is arranged in the outer bag such that the inner bag in the region of the inlet opening and / or around the inlet opening is connected to the outer bag, and that two opposite edge regions of the inner bag to two adjacent edge regions of the outer bag adjacent and / or are arranged connected to these and the other opposing edge regions of the inner Bag are arranged at a distance from the other edge regions of the outer bag.
  • the inner bag is arranged in the outer bag such that the inner bag is connected to the outer bag only in the region of the inlet opening and in the remaining area over its entire circumference and / or over its entire outer side Distance and / or loosely to the inside of the outer bag is arranged.
  • the inner bag is in the form of a hose or stocking, which is closed at one end and at its other end open and communicating with the inlet opening is arranged.
  • the inner bag is designed in the form of a hose or stocking, which is closed at its two ends and in the region of its side wall has an opening which is arranged communicating with the inlet opening.
  • Wall portion is formed and at least a second portion of the wall of the inner bag is formed as a free wall portion which extends in the interior of the outer bag and is connected with its peripheral boundary edge tightly connected to the wall of the outer bag.
  • Bag with the outer bag is given a predetermined arrangement of the inner bag in the outer bag regardless of the degree of filling and simplifies the folding of the bag.
  • the common wall section is formed in a region of the inlet opening and / or around the inlet opening, in such a way that the inlet opening is arranged centrally or eccentrically in the common wall section.
  • Constructively particularly simple and reliable embodiments with common wall section of the inner bag with the outer bag provide that the outer bag is formed of two walls which are connected together in its edge region and one of the wall having the inlet opening; and that the inner bag is formed of two walls which are interconnected in its edge region, wherein the common wall portion is formed as the wall having the inlet opening.
  • the filter bag with common wall portion of the inner bag with the outer bag also variants are possible in which a predominant part of the wall of the outer bag and the wall of the inner bag is formed as the common wall portion and / or in which the free wall portion of the inner bag is smaller than the common wall portion of the inner and the outer bag.
  • Embodiments are provided in which at least a portion of the wall of the outer bag is materially different in construction from another portion of the outer bag wall or in which at least a portion of the inner bag wall is materially different than another portion of the inner bag ,
  • the term "materially different” means that it is can be different material types and / or different material layer structure.
  • a baffle device is provided in the interior of the filter bag, which is arranged opposite the inlet opening and / or arranged flowed through the inlet opening.
  • the baffle device may have a baffle surface which is designed as a wall section of the bag wall of the inner bag or of a planar guide element arranged clamped in the inner bag.
  • the particle-laden volume flow entering through the inlet opening impinges on the baffle surface and is reflected, it bounces off. Kinetic energy of the volume flow is thereby reduced.
  • the rebounding and thus redirected particle stream then flows through the bag wall. Due to the loss of kinetic energy of the forming dust cake is less compressed and added the downstream pre-filter and filter layer less with particles. This results in an increase in the service life of the filter bag.
  • the wall section having the baffle surface has lower air permeability than the adjoining or surrounding wall section.
  • the baffle surface having wall portion compared to the adjoining and / or surrounding wall portion has one or more additional layers of material.
  • this can be carried out so that the additional material layer or the additional layers of material are glued or welded onto the wall.
  • Baffle plate which is glued or welded with its one side on the wall and forms with its free other side, the baffle.
  • the wall section and / or the impact plate having the impact surface has one or more of the following materials, i) paper material ii) thermoplastic film material iii) nonwoven material.
  • the wall section and / or baffle plate having the impact surface has one or more of the following material layers: i) paper at 30 to 150 g / m 2 ii) thermoplastic film at 30 to 150 ⁇ iii) nonwoven fabric at 30 to 150 g / m 2 .
  • the wall section having the impact surface and / or the baffle plate has an air permeability in the range of 0 l / ms 2 to 1500 l / ms 2 at a pressure drop of 200 Pa.
  • the baffle and / or the baffle plate has round, elliptical, rectangular, square or triangular outer contour. Regardless of the surface design may be provided in principle that the impact surface and / or the baffle plate has a surface extension of 20 to 300 cm 2 .
  • the entire surface extension of the planar guide element is designed as a baffle surface.
  • Versions with flat guide element can be designed so that the planar guide element for attachment to the bag wall of the inner bag or on the holding plate has elongated and / or strip-shaped fixing elements which are integrally connected to the planar guide element and / or formed as separate elements.
  • planar guide element is designed as a polygonal surface element, for example as a three- or quadrangular surface element and at each of the vertices a fixing element, preferably designed as an elongated extension.
  • Fixing elements can be designed such that they pass over with their free ends in a frame-shaped, surrounding the planar guide element fixing element or are connected to such.
  • the planar guide element is designed as an intermediate wall of the inner bag designed as a multi-chamber bag.
  • Figure 1 is a plan view of a first embodiment of a filter bag
  • Figure 1a is a sectional view taken along line A-A in Figure 1;
  • Figure 1b is a sectional view taken along the line B-B in Figure 1;
  • Figure 2 is a plan view of a second embodiment of a filter bag
  • Figure 2a is a sectional view taken along line A-A in Figure 2;
  • Figure 2b is a sectional view taken along line B-B in Figure 2;
  • Figure 3 is a plan view of a third embodiment of a filter bag;
  • Figure 3a is a sectional view taken along line AA in Figure 3;
  • Figure 3b is a sectional view taken along the line B-B in Figure 3;
  • Figure 4 is a plan view of a fourth embodiment of a
  • Figure 4a is a sectional view taken along the line A-A in Figure 4;
  • Figure 4b is a sectional view taken along the line B-B in Figure 4;
  • Figure 5 is a plan view of a fifth embodiment of a
  • Figure 5a is a sectional view taken along the line A-A in Figure 5;
  • Figure 5b is a sectional view taken along the line B-B in Figure 5;
  • Figure 6 is a plan view of a sixth embodiment of a filter bag
  • Figure 6a is a sectional view taken along the line A-A in Figure 6;
  • Figure 6b is a sectional view taken along the line BB in Figure 6;
  • Figure 7 is a plan view of a seventh Ausu ⁇ ungsbeispiels a
  • Figure 7a is a sectional view taken along the line A-A in Figure 7;
  • Figure 7b is a sectional view taken along the line B-B in Figure 7;
  • Figure 8 is a plan view of an eighth embodiment of a
  • Figure 8a is a sectional view taken along the line A-A in Figure 8;
  • Figure 8b is a sectional view taken along the line B-B in Figure 8;
  • Figures 9a to 9h is a plan view of different embodiments of
  • Figure 10 is a schematic representation of the grid structure with the
  • Figure 11 is a plan view of a ninth embodiment of a
  • FIG. 11a shows a sectional view along the line AA in FIG. 11
  • FIG. 11b shows a sectional view along the line BB in FIG. 11
  • Figure 12 is a sectional view of a tenth embodiment of a filter bag
  • FIG. 12a shows a sectional view along the line A-A in FIG. 12
  • FIG. 12b shows a sectional view along the line B-B in FIG. 12
  • Figure 13 is a plan view of an eleventh embodiment of a
  • FIG. 13a shows a sectional view along the line A-A in FIG. 13
  • 13b shows a sectional view along the line B-B in FIG. 13
  • FIG. 13c shows a detail of the baffle device
  • Figure 14 is a plan view of a twelfth embodiment of a
  • FIG. 14a shows a detailed view of the baffle device having the planar guide element in FIG. 14
  • Figure 15 is a plan view of a thirteenth embodiment of a filter bag
  • FIG. 15 a detailed view of the planar guide element having the baffle device
  • FIG. 16 is a graph of the results of measurements of the
  • Dust filter bag and in the case of a conventional standard dust filter bag
  • 1a, 1 b is a filter bag 1 for use in a vacuum cleaner, not shown.
  • the filter bag 1 is composed of an outer bag 2, a smaller inner bag 3 and a holding plate 4.
  • the inner bag 3 is arranged in the interior of the outer bag 2.
  • the outer bag 2 is formed of air-permeable filter material, for. B. from a combination of synthetic and / or semi-synthetic nonwovens.
  • the inner bag 3 is made of grid material, which as such consists of an air-impermeable material, for. B. formed from an air-impermeable film.
  • the film is, for example, a film made of a thermoplastic material. But it may also be a sheet of foam material.
  • the film has one in Figures 1, 1a, 1b Not shown perforation, in the particular embodiment, over the entire wall of the inner filter bag 3 uniformly distributed perforation.
  • the wall of the inner bag is highly permeable to air due to this perforation, preferably over 6500 l / ms 2 according to DIN 53887.
  • the grid grid openings that is the
  • Hole diameter of the perforation is matched to DMT 8 test dust.
  • the hole diameter is in the embodiment, at 3 to 6 mm.
  • the wall thickness in this example is in the range of 0.02 to 1.2 mm, but may be up to 5 mm if the film is made of a foam material.
  • the grating index of the grating material which, as explained above, is defined as the ratio of the grating surface to the clear surface of the grating opening, is in the embodiment between 1, 2 and 1, 5.
  • another mesh material can be used, for.
  • a scrim a fabric or knitwear, each with comparable grid screen openings.
  • the intended for connection to the vacuum cleaner holding plate 4 is formed in a conventional manner. It is preferably made of cardboard or plastic. It has an inlet opening 4a, via which the air to be filtered can enter the interior of the filter bag.
  • the inner bag 3 has an inlet opening and the outer bag 2 has an inlet opening. These bag inlet openings are congruent to each other and arranged congruently to the inlet opening 4a of the holding plate 4, so that therefore all the inlet openings open into one another.
  • the bags 2 and 3 are connected together in the edge region of their inlet opening, preferably welded or glued.
  • the bags 2, 3 exclusively in this Area interconnected. In the remaining area they are not connected. They are arranged loosely to one another, in such a way that the walls are arranged on all sides at a distance from each other.
  • the two bags 2, 3 are fastened with their connection region, which is formed around their inlet openings, to the rear side of the holding plate 4, by means of welding or adhesive connection.
  • This common connection region of the bags 2, 3 encloses the inlet opening 4a of the holding plate.
  • both the outer bag 2 and the inner bag 3 have a square plan view in plan view.
  • the square outline of the inner bag 3 is smaller than the square outline of the outer bag 2.
  • the inner bag 3 is arranged in the plan view of Figure 1a so that the square edges of the inner bag 3 each spaced from the square edges of the outer bag 2 are.
  • the inlet opening 4a with the holding plate 4 is arranged in the center of this square arrangement.
  • FIGS. 1a, 1b With regard to the extension of the inner bag 3 in the z direction perpendicular to the xy plane, it can be seen in FIGS. 1a, 1b that the wall of the inner bag 3 is also arranged at a distance from the wall of the outer bag 2 in the z direction and the walls of the inner and outer bags are connected to each other only in the area around the inlet opening and at the same time connected to the back of the holding plate 4 in the edge region of the inlet opening 4a.
  • Both bags 2 and 3 are as apparent from the sectional view in Figures 1a, 1b, each formed from an upper wall portion 2o and 3o and a lower wall portion 2u and 3u, which have a substantially square outline. In each case an inlet opening is formed in the upper wall section 2o or 3o.
  • the inlet openings are aligned with each other and with the inlet opening 4a of the holding plate 4, which is arranged on the outside of the upper wall portion 2o.
  • the inner bag 3 is formed in the space between the wall sections 3o, 3u and the outer bag in the space between the wall sections 2o, 2u.
  • the filter bag 1 can be used in a conventional manner in a vacuum cleaner.
  • the filter bag is arranged in a space provided for receiving the vacuum cleaner.
  • the holding plate 4 is arranged in a Garplattenan gleich founded in the wall of the receiving space so that the inlet opening 4a of the holding plate 4 is connected to a formed in the wall connection port of a suction pipe or suction hose of the vacuum cleaner.
  • the suction pressure in the receiving space is generated by a suction fan of the vacuum cleaner, which is connected to the receiving space via a suction fan connection opening.
  • the suction fan When the suction fan is switched on, the sucked air is supplied via the suction pipe or via the suction hose of the vacuum cleaner to the filter bag 1 arranged in the receiving space. In this case, the air enters the interior of the inner bag 3 via the inlet opening 4a as the air to be filtered.
  • the wall of the inner bag is highly air-permeable due to the lattice structure with the outlet openings distributed over the wall, which are part of the lattice structure.
  • fibers and particles which are larger than the grid pattern forming the outlet openings 3f become Openings 10ö (Fig. 10) and additionally also retained smaller fibers and particles on the grid material and the already deposited thereon larger fibers and particles.
  • the air already prefiltered in this first stage enters the space through the grid lattice apertures 10 (FIG. 10) or the outlet openings formed therewith, which enters between the space
  • FIGS. 1, 1a, 1b differs from the embodiment of FIGS. 2, 2a, 2b in the shape and dimensions of the inner bag 3 relative to the outer bag 2.
  • the outer bag 2 has the same design as in the exemplary embodiment of FIGS. 1, 1 a, 1 b.
  • Only the inner bag 3 differs from the embodiment in Figures 1, 1a, 1 b in that it has a rectangular plan view in the plan view in Figure 2, wherein the edges in y-direction are the same length as the edge of the square outline of outer bag 2.
  • the running in the x-direction edges of the inner bag 3 and the outer bag 2 are in the x direction to each other and are over a seam joined together.
  • the two oppositely extending in the y-direction edges of the inner bag 3 are arranged at a distance from the edges extending in the y direction of the outer bag 2.
  • the outer bag 2 is identical to the one of the embodiment of Figure 1, namely two square wall sections 2o, 2u.
  • the inner bag 3 does not have a square floor plan, as in FIG. 1, but rather an oblong rectangular floor plan. It consists of an upper rectangular wall section 3o and a lower rectangular wall section 3u, wherein the length of the long edges corresponds to the edge length of the outer bag 2 and the length of the short edges is only about half as long as the edge length of the outer bag 2.
  • the inner bag 3 is formed as a tube which is closed at its one end by a seam and connected at its opposite open end to the inlet opening of the outer bag 2 via a welded or glued joint, said common Connecting portion at the back of the holding plate 4 is fixed so that it surrounds the inlet opening 4 a of the holding plate 4.
  • the formed from the tubular grid inner bag 3 is stretchable, that is stretched in the operating state depending on the degree of filling.
  • the grid will also be referred to as a net in the following.
  • the inner bag 3 is also formed of a mesh made of mesh material.
  • the two ends of the tube are closed and an inlet opening is formed in the axially extending wall of the tube, which is connected to the edge region of the inlet opening of the outer bag this connection region of the two bags at the back of the holding plate 4, the inlet opening 4 a of the holding plate is fixed surrounding.
  • FIGS. 5 to 8 show four further exemplary embodiments in which, in contrast to the exemplary embodiments of FIGS. 1 to 4, the outer bag 2 and the inner bag 3 have a common wall section 23g.
  • the wall of the outer bag 2 is thus composed in each case of the common wall portion 23g and a separate own outer wall portion 2se.
  • the wall of the inner bag 3 is composed of the common wall portion 23g and a separate own inner wall portion 3se, respectively.
  • the holding plate 4 with the inlet opening 4a is arranged in the illustrated embodiments in the cases shown in each case to the common wall portion 23g.
  • the separate own inner wall portion 3se each forms a free inner wall portion, which has the high air permeability described by the arranged in the grid outlet openings 3f as in the embodiments described above due to its construction of mesh material.
  • Wall section 23g formed of filter material. In the transitional edge of the free wall portion of the inner bag 3se with the common wall portion 23g of the outer and inner bags, both wall portions are glued or welded together.
  • the common wall section 23g can also be formed in two layers by forming the one layer through the outer bag wall consisting of filter material and the other layer through the inner bag wall consisting of mesh material. These two layers are in the common wall section 23g to each other. You can flat or even point or only marginally connected to each other, for example, glued or welded. It is possible that these two layers are not connected to each other on all sides. You can z. B. be open on one side and form a flat pocket.
  • the embodiment of the outer bag 2 is identical to each other in the embodiments of Figures 5 to 8 and thus identical to the embodiments of Figures 1 to 4, namely with a square floor plan consisting of an upper wall 2o and a lower wall 2u, wherein on the outside the upper wall is arranged a holding plate 4 with the inlet opening 4a in alignment with the inlet opening of the bag.
  • the holding plate 4 with the inlet opening 4a is arranged on the common wall section 23g so that the inlet opening 4a is arranged in the center of area of the wall section 23g in alignment with the inlet opening of the bag.
  • the common wall section 23g has the same square shape as the upper layer 2o of the outer bag 2, but the layout of the common wall section 23g is smaller than the upper layer 2o. It is arranged concentrically parallel edge to the floor plan of the upper layer 2o.
  • the free inner wall section 3se has a corresponding floor plan as the common wall section 23g. The outer edge of the free inner wall portion 3se is close to the outer edge of the common Wandabschitts 23g by a gluing or welding is formed in the edge region.
  • the embodiment of Figure 6 differs from that of Figure 5 in that in Figure 6, the holding plate 4 with the inlet opening 4a not in Area center of the common wall portion 23g is, but eccentric.
  • the free inner wall portion 3se is arranged corresponding eccentric to the support plate 4 and the inlet opening 4a and therefore the inner bag 3 forming portion of the bag is arranged corresponding eccentric and asymmetric in the interior of the outer bag.
  • the free interior of the outer bag 2, that is, the differential interior described in connection with Figure 1 is arranged eccentrically and asymmetrically in the interior of the outer bag 2 in the embodiment in Figure 6, in contrast to the embodiment in Figure 5.
  • FIG. 7 differs from that of FIG. 5 in that the free inner wall section 3se rests against the outer edge of the bag 1 running in the x direction and is connected to the edge on the outer edge of the bag 1 in the y direction but runs at a distance.
  • the free inner wall section 3se rests against the outer edge of the bag 1 running in the x direction and is connected to the edge on the outer edge of the bag 1 in the y direction but runs at a distance.
  • the inner bag with the free inner wall may be preferably made of a tube which is closed at its two end sides and welded or glued in this area to the opposite edges of the bag 1 extending in the x-direction.
  • the tube with the outer wall of the bag is flat or pointwise or only peripherally connected to form the common wall portion 23g.
  • the embodiment of Figure 8 differs from the embodiment of Figures 5 and 6 in that the common wall portion 23g is formed both in the lower wall 2u and in the upper wall 2o, in such a way that the common wall portion 23g from the half the upper wall 2o and more than half of the lower wall 2u is composed.
  • the free inner wall 3se connects the delimiting edges of the common wall section 23g extending in the x-direction and thus divides the bag into a larger part forming the inner bag 2 and a smaller second part forming the free inner space of the outer bag.
  • the latticed material may be a layer or a fabric.
  • the threads are glued together or otherwise firmly connected.
  • the yarns are formed as longitudinally extending warp yarns and transversely extending weft yarns which are not interconnected or otherwise firmly bonded.
  • the gratings in Figures 9a and 9c are a rectangular grid and the gratings in Figure 9b are gratings having a non-rectangular diamond or rhombus structure.
  • the grids in FIGS. 9a and 9b can preferably be configured concretely as a scrim with threads taped together.
  • the lattice structure in FIG. 9c may preferably be embodied concretely as a fabric with the thicker warp threads extending in the longitudinal direction and the thinner weft threads extending in the transverse direction.
  • the grid structure in FIG. 9d is a typical knitwear in which loops formed by means of threads are respectively looped into other loops.
  • Such knits are usually textile fabrics.
  • the grid-like structure in FIG. 9e is an air-impermeable film with a perforation uniformly distributed over the surface.
  • the film is preferably formed as a thermoplastic film.
  • the perforation can be done by punching or a thermal process, the so-called flame perforation.
  • the lattice-like structure in FIGS. 9g1 and 9g2 is a slotted foil which has slots acting as outlet openings 3f, which are arranged in a uniform grid in the same way as the perforation holes of the perforated foil in FIG. 9e.
  • the slits of the slotted foil are designed to be in a closed position (see FIG. 9g1) and a slit take open position (see Figure 9g2) by automatically open and close under the action of Druckbeauschlagung in the inner bag.
  • the lattice structure in FIG. 9h is a lattice structure with a non-constant pattern. It may be a scrim where the strands are glued or otherwise bonded together, or a fabric in which the strands are formed as longitudinal warp yarns and weft yarns running transversely.
  • the course of the threads has a rectangular basic pattern, which is superimposed by an irregular oblique pattern.
  • the grid grid openings are different sizes and different shapes. Only in the average results in an approximately repeating pattern, so that the air permeability of this grid material over the area is constant on average.
  • FIG. 11 Also in the three other embodiments of Figures 11, 12 and 13 are dust filter bag with an outer bag 2 and an inner bag 3, wherein the outer bag 2 formed from a conventional air-permeable filter material and the inner bag 3 of a highly air-permeable filter material is.
  • FIG. 11 a and 11b corresponds in its construction to the embodiment of Figures 1, 1a and 1b.
  • the embodiment in Figures 12, 12a and 12b corresponds in its construction to the embodiment of Figures 2, 2a and 2b.
  • the baffle device is formed in these two embodiments, as best seen in the sectional views of Figures 11a, 11b and 12a and 12b, as a baffle having a baffle plate 5p, which adhered or welded to the inside of the wall of the inner bag is.
  • the baffle plate is preferably formed from an air-impermeable or less air-permeable material.
  • the degree of separation of the baffle plate is preferably in the range of 60 to 100% according to DIN 44956.
  • the baffle plate may preferably be formed of thermoplastic material. It can be designed to be as flexible as the bag wall, but also somewhat stiffer or also largely rigid.
  • the baffle plate is applied to the inside of the bag wall in a position opposite the inlet opening 4a. This means that in the operating position of the dust filter bag, i. if the
  • Dust filter bag is inserted into the vacuum cleaner and the suction fan is running, the suction flow flows through the inlet opening 4a in the dust filter bag and centrally impinges on the designed as a baffle surface 5p free surface of the baffle plate. Due to the airtightness or at least low air permeability of the baffle plate of the impinging suction flow is reflected, ie it bounces off.
  • the impact surface 5p of the baffle plate is formed by the size and shape of its base surface so that the suction flow entering via the inlet opening with its entire volume flow impinges centrally on the baffle surface and is deflected.
  • the baffle 5 is not formed by a baffle plate glued or welded onto the bag wall, but in that the bag wall has no grid openings in the area of the baffle 5p.
  • the bag wall is, as shown in detail in Figure 13c, formed of a grid material, namely a slotted material, but in the area of the baffle surface 5p no slots are present.
  • the position of the baffle device in Figure 13 is the same as in the embodiments in Figures 11 and 12, namely the inlet opening 4a opposite in the wall 3u.
  • the arrangement of the slots in the wall 3u is shown in detail in FIG. 13c. It can be seen that the wall 3u is slotted differently in four fields s1, s2, s3 and s4. Fields s1 and s4 form the left and right side panels, respectively. There, the slit over the entire field height is formed uniformly at a constant rate of slitting.
  • the slit consists of juxtaposed rows of slits, in which longitudinal slots are arranged one behind the other, wherein in the respective adjacent rows of slots, the slots are offset by half a slot length to each other.
  • the fields s2 and s3 are arranged between the external fields s1 and s4. They have a slot grid, which is the same as that of the fields s1 and s4, namely juxtaposed slot rows with in juxtaposed
  • the slit grid does not extend over the entire height of the s2, s3 squares, but only in a lower and upper part of the squares, with no slit being formed in the intermediate middle part.
  • This middle unslotted part of the field is in each case formed as a complementary semicircular surface.
  • These two unslotted fields form a common unslotted field of s2 and s3 with circular contour.
  • the fields s1, s2, s3, s4 are formed as rectangular fields in the concrete exemplary embodiment shown there, which each have an unslotted edge region at their outer edge. These unslotted edge regions form a stabilization framework of the wall section 3u.
  • the wall 3o is preferably provided with the same slot grid as the wall 3u shown in FIG. 12c, but preferably with a uniform, constant slot grid over the entire surface extension of the wall 3o.
  • Perforation holes or other lattice-like structure with lattice grid can be used.
  • the grid can be distributed in the wall 3u in the same way as in Figure 13c in the fields s1, s2, s3 and s4.
  • the dust filter bag according to the embodiments of Figures 1 1 to 13 provide in use in the vacuum cleaner due to their baffle 5 special functions in terms of air flow and dust separation.
  • the operation of the dust filter bag used in the vacuum cleaner in the embodiment according to these embodiments is as follows: When the suction fan is turned on, the sucked air is supplied via the suction pipe or via the suction hose of the vacuum cleaner to the filter bag 1 arranged in the receiving space. The air enters here as the air to be filtered via the inlet opening 4a in the interior of the inner bag 3, wherein the incoming particle-laden volume flow to the Inlet opening 4a bouncing baffle surface 5p bounces. This kinetic energy is reduced.
  • the rebounding and thus deflected particle stream then flows through the bag wall 3o, 3u or 3se of the inner bag 3, wherein a part of the particles is already deposited in the inner bag 3.
  • the remaining particle flow passing through the wall 3o, 3u or 3se of the inner bag 3 further loses kinetic energy as it passes through. Due to the loss of kinetic energy of the forming dust cake is less densified (Effect 1).
  • the downstream pre-filter and filter layer is less added with particles, as they can not penetrate so deeply into the material due to the lower kinetic energy (effect 2). Both effects result in an increase in the service life of the filter bag.
  • the wall of the inner bag 3 is highly permeable to air, e.g. due to a trained in the wall
  • Grid structure with outlet openings distributed over the wall, which are part of the grid structure as grid grid openings.
  • the air passes through the outlet openings of the wall of the inner bag 3, fibers and particles which are larger than the grid openings forming the outlet openings 3f and additionally also smaller fibers and particles are retained on the grid material and the larger fibers and particles already deposited thereon .
  • the pre-filtered air thus already pre-filtered in this first stage enters the space formed between the inside of the outer bag 2 and the outside of the inner bag 3 through the grid screen openings.
  • This difference interior is in hereinafter referred to as the free interior of the outer bag 2.
  • the air then flows through the wall of the outer bag 2 formed of air-permeable filter material.
  • Embodiments of Figures 11 to 13 characterized in that the baffle device 5 is not formed as part of the bag wall of the inner bag 3, but is formed on a planar guide element 6, which is spanned in the interior of the inner bag 3 in the manner of a sail.
  • the arrangement of the inner bag 3 in the outer bag 2 corresponds to that in the embodiments of Figures 11 and 13.
  • planar guide element 6 has a rectangular, i. in the illustrated case almost square main surface 6h, of the four corners of which strip-shaped fastening elements 6f extend diagonally away from the surface 6h. This strip-shaped
  • Fasteners 6h are each formed in the illustrated case as strip-shaped extensions of the main surface 6h. They have at their free end in each case an attachment point 6p, which is attached to the inside of the wall 3o of the inner bag 3.
  • the planar guide element 6 is thus in the interior of the inner bag 3 in the operating state when the bag is inflated, so stretched in the manner of a sail.
  • the substantially square main surface 6h of the planar guide element is in this case arranged opposite the inlet opening 4a in such a way that the suction air flow entering through the inlet opening 4a impinges on the main surface 6h.
  • the main surface 6h is formed of an air-impermeable material so as to act as a baffle 5p and the impinging air flow thereto bounces.
  • the main surface 6 h thus represents a baffle 5, which has a comparable effect as the baffle 5 in the embodiments of Figures 11, 12 and 13.
  • the thirteenth embodiment shown in FIG. 15 differs from the exemplary embodiment in FIG. 14 in that the planar guide element 6, which likewise has a substantially square main surface 6h provided with a baffle device 5, has a fastening frame 6r.
  • the mounting frame 6r in the illustrated case is a substantially square frame connecting the end points of the strip-shaped projections 6f.
  • For attachment to the bag wall of the mounting frame 6r is flat on the bag wall and is fixed over the entire resting frame surface on the bag wall.
  • planar guide element may also be formed of slotted or perforated material having a structure similar to Figure 13c such that no slit or perforation is formed in a central portion of the surface extension and this surface as
  • Baffle 5p acts. Surrounding this surface, the material may be provided with a slot or perforation grid with corresponding grid openings, so that this area of the planar guide element 6 is correspondingly permeable to air.
  • FIG. 16 shows the results of measurements of the suction volume flow as a function of the filling of the dust filter bag.
  • the measurements were carried out with a conventional vacuum cleaner make, wherein the suction volume flow was measured at different degrees of filling of the dust filter bag.
  • Curve 12 shows the results of the measurement with a conventional stardust filter bag made of a three ply nonwoven material, the three ply nonwoven material comprising a ply of nonwoven web of carded, thermobonded polypropylene fibers, a layer of meltblown, and a layer of spunbonded web. As the curve of curve 12 shows, the suction volume flow decreases with increasing filling.
  • the curve 11 shows the measurement results with a dust filter bag according to the invention. However, it additionally contained an inner bag consisting of grid material, wherein the grid material according to FIG. 9b is constructed and, as shown in FIGS. 12a to 12c, the grid material additionally has a baffle surface 5 having.
  • the comparison of the curves 11 and 12 shows that by inserting an inner bag of mesh material with a baffle in a standard dust filter bag, the suction volume flow compared to a standard dust filter bag can be kept comparatively high, ie the suction volume decreases more in a standard dust filter bag depending on the filling of the bag in a dust filter bag according to the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

L'invention concerne un sac filtrant utilisable dans un aspirateur et constitué d'un sac extérieur (2) et d'un sac intérieur (3). La paroi du sac extérieur (2) est formée d'un matériau filtrant perméable à l'air et la paroi du sac intérieur (3) est formée d'un matériau à mailles. Le matériau à mailles présente des orifices de sortie (3f) qui sont réalisés en tant qu'orifices de réseau de mailles traversants (10ö) du matériau à mailles et qui sont répartis sur la paroi du sac intérieur (3) de sorte que l'air de l'espace intérieur du sac intérieur (3) entre dans l'espace intérieur libre du sac extérieur (2) exclusivement ou au moins principalement par les orifices de sortie (3f) du sac intérieur (3), la perméabilité à l'air de la paroi du sac intérieur (3) étant supérieure à celle de la paroi du sac extérieur (2).
PCT/EP2009/004737 2008-07-02 2009-07-01 Sac filtrant constitué d'un sac extérieur et d'un sac intérieur et utilisable dans un aspirateur Ceased WO2010000453A1 (fr)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
DE102008031989A DE102008031989A1 (de) 2008-07-02 2008-07-02 Staubfilterbeutel mit geschlitztem Material zum Einsatz in einem Staubsauger
DE200810031988 DE102008031988B3 (de) 2008-07-02 2008-07-02 Filterbeutel mit äußerem und innerem Beutel zum Einsatz in einem Staubsauger
DE102008031988.0 2008-07-02
DE102008031989.9 2008-07-02
DE200910009152 DE102009009152A1 (de) 2009-02-06 2009-02-06 Filterbeutel mit äußerem und innerem Beutel zum Einsatz in einem Staubsauger
DE102009009152.1 2009-02-06
DE200910009154 DE102009009154A1 (de) 2009-02-06 2009-02-06 Staubfilterbeutel mit geschlitztem Material zum Einsatz in einem Staubsauger
DE102009009154.8 2009-02-06

Publications (1)

Publication Number Publication Date
WO2010000453A1 true WO2010000453A1 (fr) 2010-01-07

Family

ID=41335317

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/EP2009/004736 Ceased WO2010000452A1 (fr) 2008-07-02 2009-07-01 Sac filtrant à poussières en matériau perforé pour utilisation dans un aspirateur
PCT/EP2009/004737 Ceased WO2010000453A1 (fr) 2008-07-02 2009-07-01 Sac filtrant constitué d'un sac extérieur et d'un sac intérieur et utilisable dans un aspirateur

Family Applications Before (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/004736 Ceased WO2010000452A1 (fr) 2008-07-02 2009-07-01 Sac filtrant à poussières en matériau perforé pour utilisation dans un aspirateur

Country Status (2)

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DE (1) DE202009002970U1 (fr)
WO (2) WO2010000452A1 (fr)

Cited By (4)

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EP2366320A1 (fr) 2010-03-19 2011-09-21 Eurofilters Holding N.V. Sac d'aspirateur
EP2502537A1 (fr) 2011-03-22 2012-09-26 Jan Schultink Dispositif efficace au plan écologique destiné à l'aspiration
DE102011014682A1 (de) 2011-03-22 2012-09-27 Eurofilters Holding N.V. Vorrichtung zum Staubsaugen mit Staubsaugergerät und Filterbeutel
EP2641523A1 (fr) 2012-03-22 2013-09-25 Eurofilters Holding N.V. Dispositif destiné à aspirer à l'aide d'un aspirateur et d'un sac filtrant

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CN103070636A (zh) * 2013-01-08 2013-05-01 上海曾曦净化科技有限公司 一种新型结构的低压损吸尘器过滤袋
EP2835163B1 (fr) 2013-08-09 2016-10-12 Eurofilters N.V. Sac filtrant pour un aspirateur et procédé de détermination d'une surface d'un sac filtrant d'aspirateur directement en contact avec le flux
EP3909489A1 (fr) * 2020-05-13 2021-11-17 Hilti Aktiengesellschaft Sac d'élimination à matrice de compensation de pression

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EP1695649A1 (fr) * 2005-02-28 2006-08-30 Matsushita Electric Industrial Co., Ltd. Aspirateur et sac à poussières pour aspirateur
EP1787563A1 (fr) * 2005-11-22 2007-05-23 Eurofilters Holding N.V Sac filtrant d'un aspirateur et son utilisation
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Cited By (23)

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Publication number Priority date Publication date Assignee Title
EP2366320A1 (fr) 2010-03-19 2011-09-21 Eurofilters Holding N.V. Sac d'aspirateur
EP2366319A1 (fr) 2010-03-19 2011-09-21 Eurofilters Holding N.V. Sac d'aspirateur
EP2366321A1 (fr) 2010-03-19 2011-09-21 Eurofilters Holding N.V. Sac d'aspirateur
WO2011113544A2 (fr) 2010-03-19 2011-09-22 Eurofilters Holding N.V. Sac d'aspirateur filtrant
WO2011113545A2 (fr) 2010-03-19 2011-09-22 Eurofilters Holding N.V. Sac d'aspirateur filtrant
WO2011113543A1 (fr) 2010-03-19 2011-09-22 Eurofilters Holding N.V. Sac d'aspirateur filtrant
US10188248B2 (en) 2010-03-19 2019-01-29 Eurofilters Holding N.V. Vacuum cleaner filter bag
US10182691B2 (en) 2010-03-19 2019-01-22 Eurofilters Holding N.V. Vacuum cleaner filter bag
US10178932B2 (en) 2010-03-19 2019-01-15 Eurofilters Holding N.V. Vacuum cleaner filter bag
EP2662010A1 (fr) 2010-03-19 2013-11-13 Eurofilters Holding N.V. Sac d'aspirateur
WO2012126613A1 (fr) 2011-03-22 2012-09-27 Eurofilters Holding N.V. Dispositif d'aspiration comprenant un aspirateur et un sac filtrant
WO2012126616A1 (fr) 2011-03-22 2012-09-27 Jan Schultink Dispositif écologiquement efficace pour l'aspiration des poussières
WO2012126617A1 (fr) 2011-03-22 2012-09-27 Jan Schultink Dispositif écologiquement efficace pour l'aspiration des poussières
US9713409B2 (en) 2011-03-22 2017-07-25 Eurofilters N.V. Ecologically efficient vacuuming device
US9877627B2 (en) 2011-03-22 2018-01-30 Eurofilters N.V. Ecologically efficient vacuuming device
DE102011014682A1 (de) 2011-03-22 2012-09-27 Eurofilters Holding N.V. Vorrichtung zum Staubsaugen mit Staubsaugergerät und Filterbeutel
EP2502536A1 (fr) 2011-03-22 2012-09-26 Jan Schultink Dispositif efficace au plan écologique destiné à l'aspiration
EP2502537A1 (fr) 2011-03-22 2012-09-26 Jan Schultink Dispositif efficace au plan écologique destiné à l'aspiration
EP2641523A1 (fr) 2012-03-22 2013-09-25 Eurofilters Holding N.V. Dispositif destiné à aspirer à l'aide d'un aspirateur et d'un sac filtrant
WO2013139552A1 (fr) 2012-03-22 2013-09-26 Eurofilters Holding N.V. Dispositif d'aspiration de poussière comportant un aspirateur et un sac filtrant
US9402520B2 (en) 2012-03-22 2016-08-02 Eurofilters Holding N.V. Vacuum cleaning apparatus having a vacuum cleaning unit and a filter bag
EP3072430A1 (fr) 2012-03-22 2016-09-28 Eurofilters Holding N.V. Dispositif destiné à aspirer à l'aide d'un aspirateur et d'un sac filtrant
EP3072430B1 (fr) 2012-03-22 2017-05-10 Eurofilters Holding N.V. Dispositif destiné à aspirer à l'aide d'un aspirateur et d'un sac filtrant

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