WO2017220415A1 - Filtre d'habitacle et ensemble de filtration - Google Patents

Filtre d'habitacle et ensemble de filtration Download PDF

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Publication number
WO2017220415A1
WO2017220415A1 PCT/EP2017/064603 EP2017064603W WO2017220415A1 WO 2017220415 A1 WO2017220415 A1 WO 2017220415A1 EP 2017064603 W EP2017064603 W EP 2017064603W WO 2017220415 A1 WO2017220415 A1 WO 2017220415A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
filter medium
interior
free
fold
Prior art date
Application number
PCT/EP2017/064603
Other languages
German (de)
English (en)
Inventor
Peter Pekny
Dieter Weiss
Elmar RIEß
Dieter Schreckenberger
Emrullah Atilgan
Khalid Es-Saidy
Original Assignee
Mann+Hummel Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mann+Hummel Gmbh filed Critical Mann+Hummel Gmbh
Priority to DE112017003069.2T priority Critical patent/DE112017003069A5/de
Publication of WO2017220415A1 publication Critical patent/WO2017220415A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
    • B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
    • B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
    • B01D46/522—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material with specific folds, e.g. having different lengths
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2271/00—Sealings for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2271/02—Gaskets, sealings

Definitions

  • the present invention relates to a filter element, in particular a cabin filter for filtering air for the interior of a vehicle or building. Furthermore, the invention relates to a filter assembly with such a filter element and a filter holder.
  • folded or pleated filter materials such as filter fleeces forming a fold pack
  • filter fleeces For filtering air for the interior of a motor vehicle, folded or pleated filter materials, such as filter fleeces forming a fold pack, are often used.
  • an initially flat filter material sheet is folded in a zigzag shape.
  • the fold pack is held by side straps and headbands or other frame.
  • Such filter elements can be fixed exchangeably in a filter holder.
  • the filter assembly thus formed may be installed in an air conditioning system of a corresponding motor vehicle.
  • DE 10 2005 048 841 B3 describes a cabin filter for a motor vehicle.
  • the interior filter comprises a frame as well as a filter medium completely peripherally fixed in the frame.
  • the frame is designed with guide shafts.
  • the interior filter can be inserted along its planar extent into a filter housing.
  • guide pins are arranged, which correspond to the guide shafts of the frame and guide the interior filter during insertion of the interior filter in the filter holder.
  • DE 10 201 1 1 17 842 B3 discloses a filter element for insertion into a housing of a ventilation or air conditioning system comprising a bellows with pleat walls and pleat back and a front side which is zuwendbar a wall of the housing, wherein the end face is associated with a guide shaft, wherein the guide shaft is formed by at least one breakthrough in the fold walls and / or in a front side seaming side strips and wherein the opening is provided with a reinforcement, wherein the reinforcement is formed as a separate component.
  • DE 20 2006 018 863 U1 describes a filter element with an activated carbon layer, which is connected to an upper cover layer and a lower cover layer to a filter layer, wherein the filter layer folded in the sense of a bellows and at least with another such filter layer form fit over the Folded alignment of the bellows is arranged, wherein the at least two filter layers at least on two sides by means of a side fleecees are connected to each other and wherein at least one of the side fleeces assumes a sealing function.
  • the object of the present invention is to provide an improved filter element.
  • the filter element should have a simple structure.
  • a filter element with a folded filter medium.
  • the filter medium has at least one free fold end edge which delimits an opening at least in sections in order to introduce at least one pin, which is assigned to a filter receptacle for receiving the filter element, through the opening between folds of the filter medium.
  • an opening in the corresponding side of the filter medium which allows the insertion of the pin laterally into the filter medium into a wrinkle interspace, is particularly simple.
  • the opening is at least partially bounded by one or more free fold end edges.
  • a filter element is easy to produce.
  • the insertion of the at least one pin preferably takes place in a direction parallel to the folds. But also an introduction perpendicular to the planar extension of the filter medium is conceivable.
  • the pin may have a round, oval, square or other type cross section. In particular, one, two, three or more such pins may be provided.
  • wrinkle front edge is meant the frontal, fiber ends, especially by cutting the filter medium produced wrinkle surface between two adjacent fold edges of a respective fold.
  • the at least one wrinkle end edge is “free”, it is meant that the at least one wrinkle end edge is free from side-band, i. without sideband, executed and / or further not glued or sewn with other folds or filter media sections and / or still not encapsulated or glued.
  • the filter element has a stabilization device, which stabilizes folds of the filter medium. Thereby, the filter element can be transported and handled without deforming significantly.
  • the stabilization device is formed in sections or entirely open along a side of the filter medium which has at least one free fold end edge.
  • the stabilization device is designed to be open in sections along the side, it is meant that the stabilization device is interrupted along the side. In other words, the stabilization device does not extend in sections along this side of the filter medium.
  • the stabilizing device is formed completely open along the side of the filter medium, it is meant that the stabilizing device is completely recessed along the side. In other words, the stabilizer does not extend along this side of the filter media.
  • the side of the filter medium is meant the plane in which the at least one fold end edge extends.
  • the stabilization device may be formed partially or wholly open on two opposite sides or two sides of the filter medium adjoining one another over corners.
  • the filter medium can be designed as a self-supporting material, i.e., its folds do not deform in filter operation despite the partial absence of the stabilizer in a manner which is detrimental to filter operation.
  • This embodiment is particularly desirable when the stabilizer is provided on only one or a few sides of the filter medium.
  • the stabilization device has at least one sideband, a headband and / or a reinforcement on the outflow or outflow side. With the arrival or downstream side, the raw or clean side of the filter element is meant.
  • the at least one sideband and / or the at least one headband may be formed with an L-angle.
  • the L-angle can be connected in particular cohesively to at least one pleat tip of the filter medium.
  • the at least one sideband, the at least one headband and / or the at least one reinforcement are formed integrally or in one piece with one another.
  • unitary it is meant that the elements forming the stabilizer are firmly connected together, for example using fasteners.
  • the stabilization device can also be produced in several parts.
  • the stabilization device may consist of a plurality of elements, for example the at least one sideband, the at least one headband and / or the at least one reinforcement, the elements being provided separately from one another, ie not connected to one another.
  • integral is meant that the stabilizer-forming elements are made of one and the same material and of one piece.
  • the stabilization device can be produced, for example, as a one-piece plastic injection-molded part.
  • the at least one sideband, the at least one headband and / or the at least one reinforcement surrounds the filter medium.
  • the side band may be pocket-shaped, so that fold end edges of the filter medium are received in the pocket formed.
  • the reinforcement is formed as a grid.
  • the grid may, for example, comprise intersecting longitudinal and transverse elements, which are in particular formed integrally with one another.
  • the grid may be produced in particular by plastic injection molding.
  • the grid may have an edge which surrounds the filter medium.
  • the reinforcement has at least one strut, which is connected at its respective ends to opposite headbands of the stabilizing device.
  • struts For example, two particularly parallel struts can be provided.
  • the least a strut for example, be strip-shaped, in particular be formed with a rectangular profile.
  • the at least one side band is connected to pleat end edges of the filter medium
  • the at least one headband is connected to a pleat end of the filter medium
  • / or the reinforcement is connected to pleat tips of the filter medium.
  • the connection can be provided as a material fit, for example by means of gluing, fusing or welding.
  • a positive connection in particular by means of the aforementioned pocket-shaped configuration, can be achieved.
  • the filter medium has a polygonal shape, wherein the side extends between two corners of the polygonal shape.
  • the filter medium may be rectangular or pentagonal. The combination of a rectangular shape with a semicircular shape is conceivable.
  • At least one first fold of the filter medium for the insertion of the at least one pin has a lower height than a second fold adjacent thereto. Due to the smaller height of the first fold a recessed area is created, in which the at least one pin can be inserted.
  • the pleat spacing varies such that the recessed area is created for insertion of the at least one pin.
  • the filter medium is sectionally flat between two folds, i.e., in the area "missing" a fold. Also by this, the recessed area for inserting the pin can be created.
  • the filter medium is designed to be softer in a region encompassing the at least one free edge of the fold to form a seal with a wall of the filter housing than in a region lying further inwards.
  • the softer area nestles against the wall in such a way that a seal is created.
  • the seal is to be understood as meaning that preferably less than 3%, more preferably less than 1% and even more preferably less than 0.1% of the upstream air volume flow flow through between the filter element and the filter receiver, that is, pass unfiltered.
  • the percentages mentioned here can be determined, for example, such that the volume flow through the filter element is measured once in a state in which the inflow surface of the filter element is taped, and further measured in a state in which the inflow surface is not taped. These air volume flows are then set in relation to each other.
  • the air volume flow can be, for example, 100 to 600 m 3 / h.
  • the at least one wrinkled end edge of the filter medium has frayed fiber ends to create the seal with the wall of the filter receptacle.
  • the fiber ends In the state of the filter element inserted into the filter holder, the fiber ends then abut against the wall in a sealing manner.
  • the fraying and the associated structural loss lead here to the desired softness of the filter medium.
  • the seal may also be provided otherwise.
  • a seal may be attached, in particular molded, to the fold end edges.
  • the filter medium is reinforced adjacent to the region which encompasses the at least one free fold end edge.
  • the filter medium is reinforced adjacent to the frayed fiber ends.
  • the reinforcement can be provided by means of a reinforcing bead, in particular of hotmelt adhesive.
  • a filter assembly with a filter element, as described above, and a filter receptacle in which the filter element is received.
  • the filter element is preferably flowed through perpendicular to its planar extent.
  • the filter element in the plane of its planar extension in the filter holder can be inserted.
  • a filter receptacle is to be understood as meaning, in particular, a filter housing.
  • the filter housing may be formed as a receiving shaft.
  • the filter receptacle has at least one pin which extends into the filter medium via the side. In particular, when inserting the filter element in the filter holder so moves the pin through the page into the filter medium into it.
  • the at least one pin extends parallel to the folds of the filter medium.
  • the at least one pin extends in a recessed area of the first fold.
  • a filter element with a folded filter medium and preferably at least one adsorption layer with activated carbon is provided.
  • the filter medium has at least one free fold end edge, which is adapted to seal against a wall of a filter receptacle for receiving the filter element.
  • a seal is created directly between the filter element and the filter holder, which does not rely on the use of an (additional) seal in a simple manner.
  • this by no means precludes the filter element from being able to have an additional seal on one or more sides, the sealing being effected on at least one other side (or over a subarea thereof) by means of the free wrinkle end edge (s) sealing against the wall of the filter receptacle ,
  • the adsorption layer with activated carbon serves in particular for odor binding.
  • the activated carbon used may be derived from wood or hard coal, polymer based, tar based or coconut shell based.
  • the base material for the activated carbon ion exchange beads are used, which are made of polymer-based, for example, synthetic resins, in particular from divinylbenzene crosslinked polystyrene.
  • the activated carbon may be hydrophobic activated carbon.
  • Hydrophobic activated carbons are understood in particular to be those which have a comparatively low water absorption capacity.
  • an activated carbon is used, which at a relative humidity of 50%, a water absorption of ⁇ 10 mass percent, in particular based on the Adsorptionsast the isotherm. This water absorption is particularly preferably ⁇ 5% by mass.
  • the activated carbon has a BET surface area of greater than 600 m 2 / g, preferably greater than 800 m 2 / g (preferably measured according to DIN ISO 9277: 2003-05). As a result, a sufficient adsorption can be ensured in a small space.
  • activated carbon is used in pourable or pourable form, for example in the form of granular or spherical or otherwise shaped particles.
  • the activated carbon particles preferably have activated carbon particle sizes (average diameter) of between 0.1 and 1 mm, preferably 0.2 to 0.7 mm, and may be in the form of, for example, granulated activated carbon or activated carbon ball.
  • an open-cell foam with free-flowing activated carbon can be used for the adsorption layer.
  • reticulated foams z For example, from plastics such as polyurethane, polyurethane ethers or polyurethane esters used.
  • the pore sizes of the foam are between 20 and 50 ppi (pores per inch) or between 0.5 and 2 pores per mm. It is measured in a comparative optical process, under the microscope defines a fully formed pore as a "standard pore" and over a distance section, the pores occurring there are compared with this and counted. Pores that are not completely formed compared to the standard pore are proportionately counted.
  • Activated carbon particles are preferably introduced into this foam and preferably fixed.
  • the activated carbon particles are preferably fixed in the foam by means of an adhesive, for example by means of a polyurethane-based two-component adhesive. This can be achieved, for example, by first soaking the foam with an adhesive and then - before the adhesive dries or hardens - by spraying activated carbon particles, in particular with shaking.
  • a two-component adhesive, hot melt adhesive or an aqueous adhesive can be used.
  • a layer of a fixed bed of activated carbon is used as the adsorption filter layer.
  • This can be realized in a single-layer or multi-layer structure.
  • a carrier layer for example, a plastic stretch grid or a layer of a sheet material, for. B.
  • a particulate filter medium can be used as a carrier layer.
  • the carrier layer used is a nonwoven made of spunbonded or meltblown polyester fibers, for example PET fibers (polyethylene terephthalate) or PBT fibers (polybutylene terephthalate).
  • This may be a basis weight of 25-120 g / m 2 , preferably 50-100 g / m 2 , more preferably 60-90 g / m 2 and an air permeability> 3000 l / m 2 s, preferably> 4000 l / m 2 s at a pressure difference of 200 Pa.
  • the air permeability is measured in particular according to ISO 9347.
  • the fill layer of activated carbon particles is applied to the carrier layer and preferably fixed by means of a fine adhesive application on the carrier layer.
  • the pour layer preferably comprises a coating of 100-1200 g / m 2 of activated carbon particles on the carrier layer. Preferably, between 200 and 600 g / m 2 are used.
  • the position of a fixed bed with carrier layer and pour layer preferably has an air permeability in the range of 800-1300 l / m 2 s, in particular between 900 and 1200 l / m 2 s and a basis weight in the range of 350 to 950 g / m 2 , in particular between 450 and 750 g / m 2 at a layer thickness, in particular in the range of 1 to 6 mm.
  • the adsorption filter layer has a layer structure of a plurality of fixed beds.
  • a first layer of a fixed bed with the side on which the activated carbon is arranged (activated carbon side)
  • placed on the activated carbon side of a second layer fixed bed and connected to this example by gluing As a result, a semifinished product with two carrier layers or outer layers and an intermediate layer of bulk material is formed.
  • Such semi-finished products can in turn be arranged one above the other several times to increase the filtration performance, for example between 2 and 10 semifinished products, preferably between 3 and 7 semifinished products.
  • the at least one adsorption layer is arranged between fiber layers of the filter medium.
  • the at least one adsorption layer comprises a bed of activated carbon or an open-cell foam with free-flowing active carbon.
  • the at least one adsorption layer is removed or recessed in an edge region of the filter medium which encompasses the at least one free fold end edge, in particular by trickling out or brushing out the activated carbon.
  • the edge area can therefore not be equipped in the manufacturing process from the outset with an adsorption layer, whereby the recessed edge area arises.
  • the activated carbon is fixed in a region lying further inwards with respect to the edge region, in particular by means of adhesive.
  • the filter medium is sealed in an edge region of the filter medium comprising at least one free fold end edge, in particular by means of welding, gluing or wax.
  • the filter medium is fluffy and / or softer in an edge region comprising the at least one free fold end edge than in a region located further inward with respect to the edge region.
  • the filter medium is reinforced adjacent to the edge region comprising the at least one free fold end edge.
  • the at least one free fold end edge is adapted to abut against the at least one side facing nose for sealing with the filter housing, to engage in a wall-side groove, abut against the wall by bending one of the fold end edge associated edge portion or against the wall under compression of a abut the edge of the edge associated with the edge.
  • a stabilizing device which stabilizes folds of the filter medium, the stabilizing device preferably being formed in sections or entirely open along a side of the filter medium which has at least one free fold end edge.
  • the stabilization device has at least one sideband, a headband and / or an upstream or downstream reinforcement.
  • the at least one sideband with pleated end edges of the filter medium, the at least one headband connected to a pleat end of the filter medium and / or the reinforcement with pleat tips of the filter medium.
  • the filter medium has a polygonal shape, wherein the side extends between two corners of the polygonal shape.
  • the at least one free fold end edge delimits, at least in sections, an opening in order to introduce at least one pin, which is assigned to the filter receptacle, through the opening between folds of the filter medium.
  • a filter assembly with a filter element, as described above, and a filter housing is provided, in which the filter element is received, wherein the at least one free Faltenstirnkante seals against a wall of the filter holder.
  • the at least one free fold end edge seals against the wall in the impact, and / or the seal is provided between the at least one free fold end edge and the wall of the filter mount such that less than 3%, more preferably less than 1% and even more preferably, less than 0.1% of an inflow-side air volume flow flow through between the filter element and the filter receiver.
  • the filter element is in particular a cabin filter for filtering air for the interior of a vehicle or building.
  • the cabin air filter is suitable for installation in an air conditioning system, in particular of a vehicle or building. That is, the filter element has the required properties, in particular rigidity and sealing properties, in order to actually be able to install it in an air conditioning system. Semi-finished products are excluded from this definition.
  • the filter element can be used in motor vehicles, trucks, construction machines, watercraft, rail vehicles, as well as in building technology or in aircraft.
  • the stabilization device or at least one sideband, a headband or a reinforcement of the same can be materially connected to the edge of the filter medium, in particular glued, welded or fused.
  • the stabilization device or at least one sideband, a headband or a reinforcement thereof heated and the filter medium in the heated material be pressed.
  • the stabilization device or at least one sideband, a headband or a reinforcement of the same can be injection-molded onto the filter medium.
  • an adhesive can be used as filler material.
  • the stabilizing device or at least one sideband, a headband or a reinforcement thereof may be made of the same material as the filter medium.
  • the stabilization device or at least one sideband, a headband or a reinforcement thereof may be formed as a plastic injection molded component.
  • the stabilizer or at least one sideband, a headband or a reinforcement thereof may be stiff or flexible.
  • the "folded" filter medium may be folded or wavy. For example, zigzag or W folds are known as folds.
  • the filter medium can be embossed and then folded into sharp edges at embossing edges.
  • As a starting material can serve a sheet material filter sheet, which is transformed accordingly.
  • the filter medium is, for example, a filter fabric, filter fabric or a filter fabric.
  • the filter medium can be produced in a melt-blow process.
  • the filter medium may include natural fibers such as cotton or synthetic fibers such as polyester, polyphenylsulfide or polytetrafluoroethylene. The fibers may be oriented in, skewed and / or transversely to the machine direction during processing.
  • a corresponding filter element serves to filter fluid, ie gaseous and / or liquid media, for example air.
  • the gaseous medium or air here also includes gas or air-solid mixtures or gas or air-liquid mixtures.
  • an air conditioner may have the filter element.
  • the filter element may have a sealing device which seals a raw side associated with the filter element with respect to a clean side thereof.
  • the sealing device can be identical in construction to the stabilizing device or at least one sideband, a headband or a reinforcement thereof.
  • the sealing device may be formed as an additional component.
  • the sealing device can be attached to the filter medium, the stabilizing device or at least one sideband, headband or a reinforcement thereof, the filter element or the filter holder.
  • 1 A to 1 D a filter assembly and a cabin filter according to an embodiment
  • 2A and 2B a cabin filter according to another embodiment
  • 3A and 3B a cabin filter according to another embodiment
  • 4A and 4B a cabin filter according to another embodiment
  • 5A and 5B a filter assembly and a cabin filter according to another embodiment
  • 6 shows a filter arrangement according to a further embodiment
  • FIGS. 7A and 7B show a filter arrangement according to a further embodiment
  • 9A and 9B a filter assembly according to another embodiment
  • 10A and 10B a filter assembly according to another embodiment
  • Fig. 1 1 A and 1 1 B a filter assembly according to another embodiment
  • FIG. 12 shows a filter arrangement according to a further embodiment.
  • Fig. 1A shows a perspective view of a filter assembly 1 according to an embodiment.
  • the filter arrangement 1 can be used, for example, in a vehicle or a building, in particular in an air conditioning system.
  • the filter assembly 1 comprises a cabin filter 2, which is accommodated in a filter housing 3.
  • the filter housing 3 is only indicated schematically to release the view of the cabin air filter 2.
  • the interior filter 2 comprises a folded filter medium 4 and preferably a stabilization device 5.
  • the filter medium 4 comprises, for example, a zigzag-folded filter material, in particular a non-woven plastic material. Instead of the zigzag folding, the filter medium 4 could also have a wave-shaped folding or another folding. Instead of a nonwoven material, the filter medium may also comprise, for example, a fabric or scrim.
  • the stabilizing device 5 generally serves to stabilize folds of the filter medium 4.
  • the stabilizing device 5 has a multi-part construction and comprises a reinforcement 6 in the form of a grille, for example arranged downstream, in the form of a grating and a sideband 7 and Headbands 8, 9.
  • the grid 6 is shown in greater detail in FIG. 1B in a perspective view.
  • the grating 6 comprises longitudinal and transverse elements 10, 11 and a frame 12 comprising these.
  • the frame 12 may have a shape corresponding to the filter medium 4.
  • the filter medium 4 has a pentagonal shape.
  • the pentagonal shape is formed by a rectangle, which is beveled at its one corner.
  • the frame 12 has accordingly also this pentagonal shape.
  • the grid 6 may for example be integrally formed, in particular as a plastic injection molded component.
  • Fig. 1 C which shows a view I rotated by 180 °, the grid 6 is arranged on pleat tips 13 of the filter medium 4.
  • the grid 6 can in particular be coherently joined to the pleat tips 13, for example, adhesively bonded, fused or welded.
  • FIG. 1C shows the head bands 8, 9, which are in particular materially bonded, for example glued, fused or welded to a respective associated end fold 14, 15.
  • the headbands 8, 9 can each have an L-angle 16, which is connected to pleat tips 17 of the filter medium 4 opposite the pleat tips 13 in particular cohesively, for example glued, melted or welded.
  • the sideband 7 shown in FIG. 1A is in particular materially connected to the fold end edges 18 of the filter medium 4, for example adhesively bonded, fused or welded.
  • the side band 7 may be integrally formed with the head bands 8, 9 in one piece or in one piece.
  • the headbands 8, 9 and the side band 7 may for example be made of a nonwoven material. Alternatively, they may be made by a plastic injection molding process and have a rigid shape.
  • the stabilizing device 5 is formed completely open along a first and a second sides 19, 20 of the filter medium 4. That is, along the sides 19, 20, no element of the stabilizer 5, in particular no sideband 7, is provided.
  • the sides 19, 20 comprise a multiplicity of free fold end edges 21 of the filter medium 4. With a single fold end edge 21, the fold face between two adjacent fold tips (also referred to as folding or embossing edges), in particular by cutting the filter medium, is provided. 13, 17 of a respective fold, as illustrated in FIG. 1C by way of example for a fold 30.
  • the first side 19 extends from a first corner 22 to a second corner 23 and the second side 20 from the second corner 23 to a third corner 24 of the pentagonal shape of the filter medium 4.
  • the second side 20 is oblique to the course of the folds 28 - 33 oriented, for example, with an angle between 10 ° and 80 °.
  • the filter medium 4 is traversed by air L perpendicular to the plane E, ie from the inflow side AN toward the outflow side AB.
  • the filter housing 3 has pins 26, which extend from a shown in Fig. 1 A and 1 D wall 27 of the filter housing 3 in the space enclosed by the filter housing 3 interior. According to the embodiment, two pins 26 are provided. Alternatively, only one pin 26 or it could also be more than two, for example, three pins 26 may be provided.
  • FIG. 1C shows two different exemplary embodiments. On the left is shown that a fold 28 of the filter medium 4 may be performed with a lower height H, than the folds 29 adjacent to the fold 28. Right is shown in Fig. 1 C, that the fold gap 25 can be created by the Fold spacing varies. Correspondingly, the fold 30 is spread further than the folds 31 adjacent to it.
  • the pins 26 are executed according to the embodiment with a round cross-section. Alternatively, they could also have a polygonal or different cross section. About the pin 26 and this respective associated folding interstices 25 ensures that only the right type interior filter 2 can be used in the filter housing 3. This avoids malfunctions.
  • the fold end edges 21 of the first and second sides 19, 20 can be made sealed. Alternatively or additionally, these may be provided with a seal, not shown, by means of which the cabin filter 2 with respect to the filter housing 3, in particular the wall 27 of FIG. 1 D, seals. Another possibility for achieving a seal between the interior filter 2 and the filter housing 3 may be to produce the filter medium 4 in a peripheral region 42 comprising the fold end edges 21 of a different material than a further inward region 43 of the filter medium 4.
  • the other material may be made of a sealing, in particular softer material.
  • FIG. 1D A preferred embodiment for achieving the desired sealing is illustrated in more detail in FIG. 1D.
  • This shows sections and by way of example two folds 32, 33 adjacent to the wall 27 of the filter housing 3.
  • the folds 32, 33 are frayed in the region 42 at their fold end edges 21.
  • the frayed fiber ends are designated 35.
  • the filter medium 4 is reinforced adjacent to the frayed fiber ends 35 with a glue bead 36.
  • the frayed fiber ends 35 can be produced, for example, by roughening the filter medium 4 of the corresponding nonwoven material, fabric or fabric.
  • FIGS. 2A to 4B The exemplary embodiments according to FIGS. 2A to 4B will be explained below, with only the particularities with respect to FIGS. 1 A to 1 D being discussed.
  • the stabilizing device 5 comprises only the reinforcement 6. That is, in particular the side band 7 and the headbands 8, 9 of Fig. 1A are not provided. Nevertheless, in order to achieve a sufficient reinforcement of the filter medium 4, the frame 12 can be provided with an edge 37. As can be seen in FIG. 2A, the edge 37 extends partially over the side having the end fold 14 of the filter medium 4, over the side of the filter medium 4 which has fold ends 18, and over the side of the filter medium 4 which has the end fold 15 Thus achieved partial enclosure of the filter medium 4 causes a gain thereof, in particular in a plane parallel to the grid 6th
  • the grid 6 is not arranged on the downstream side AB, but on the upstream side AN.
  • the second embodiment illustrated with reference to FIG. 2A shows that the stabilizing device 5 does not have to completely omit the sides 19, 20 in order to allow the insertion of the pins 26.
  • Demge- measure is also an embodiment conceivable in which the sides 19, 20 - illustrated here for the page 19 - are formed open only in sections, so that only at least one wrinkle end edge 21 or - as in the present embodiment - two adjacent Faltenstirnkanten 21, 21 ' free, ie side bandless, are formed.
  • a sideband 38 is provided, which is completely recessed in the area of the fold gap 25, so that as a result two sideband sections 44, 45 are formed.
  • Such a section-wise recess of the stabilizing device 5 may be easier to realize in terms of production technology, in particular compared to providing holes in the sideband 38, for example by: 1. Slitting the sideband 38 and second to the first sideband portion 44 offset sticking of the second sideband portion 45 on the side 19 of the filter medium 4.
  • the sideband 38 could be used in particular in any other of the embodiments shown here.
  • FIGS. 3A and 3B An exemplary embodiment is illustrated with reference to FIGS. 3A and 3B, in which the grid 6 is formed in one piece, in particular in one piece, with the sideband 7. Headbands are in this case - although not excluded - not provided.
  • the stabilization device 5 thus formed can be produced, for example, as a plastic injection-molded part.
  • the side band 7 is formed with a pocket 39.
  • the side of the filter medium 4 having the fold edges 18 protrudes into the pocket 39.
  • the pocket-shaped geometry forming edge 40 of the sideband 7 thus encloses the filter medium 4 a.
  • it can extend along the inflow and outflow sides AN, AB and the sides of the filter medium 4 assigned to the end folds 14, 15.
  • the filter medium 4 has a rectangular shape.
  • the stabilization device 5 saves one of the four sides, namely the side 19, completely. But also the side band 7 could be missing, so that the filter medium 4 would be formed open on opposite sides.
  • the reinforcement 6 is not designed as a grid, but as two parallel strips 41 which extend along the downstream side AB of the headband 8 to the opposite headband 9 and with these each firm, in particular cohesively, are connected.
  • the strips 41 may, for example, be produced as plastic injection-molded parts.
  • the strips 41 are each materially connected to pleat tips 17 of the filter medium 4, in particular glued, fused or welded.
  • FIG. 5A shows an interior space filter 2, which is preferably designed as a combined filter element and has a folded filter medium 4.
  • the cabin air filter 2 may, but need not, have a nature which corresponds to the embodiments described above, unless stated otherwise below. This also applies vice versa, so that the embodiments of FIGS. 1A to 4B can be developed according to the embodiments described below.
  • the folds 29, 30 (only two of the folds are provided with reference numerals by way of example) have a varying height H. Furthermore, the pleat spacing between The folds 29, 30 vary so that the distance A1 is not equal to the distance A2.
  • the filter medium 4 can be carried out self-supporting, ie the folds 29, 30 are dimensionally stable at a proper flow in the filter operation.
  • the interior filter 2 or the filter medium 4 can have a rectangular shape (shown in solid line) or a trapezoidal shape (shown in dash-dotted line) in plan view, that is, in the plane E of its planar extent.
  • a triangular, pentagonal or polygonal, round, semi-circular (shown in dashed line) or oval shape is also conceivable.
  • a single or multiple curved shape of the filter medium 4 is possible, as explained in more detail later.
  • the filter medium 4 comprises a layer structure which, for example, comprises at least one adsorption layer 50 with activated carbon.
  • the adsorption layer 50 may include, for example, a bed of activated carbon or an open-cell foam with free-flowing activated carbon.
  • the layer structure may comprise one or more fiber layers 51, 52. At least one of the fiber layers 51, 52 may be formed as a particle filter, in particular a fine filter for filtering out particles having a diameter of 10 ⁇ m and larger, preferably 2.5 ⁇ m and larger. Furthermore, one or more of the filter layers 51, 52 may comprise an antimicrobial substance, for example nanosilver, and / or an antiallergenic substance, for example polyphenols. In particular, one and the same filter layer 51 may comprise the antimicrobial substance and the antiallergenic substance. The other filter layer 52 then preferably acts as a particle filter.
  • the cabin filter 2 may be entirely (shown in FIG. 5A) or partially without additional seals or stabilizing elements such as sidebands attached thereto. Not only does this make manufacturing easier, but also possibly because components can be saved. Rather, this can also result in a better deformability of the cabin air filter 2, as explained in more detail in connection with FIGS. 9A to 12. In principle, a flexibility of the interior filter 2 can thus result around one (or even more) axis N, which lies in the plane E (see also FIG. 10A) of its planar extension.
  • a compressible stabilizing device 5 see FIG. 1 A
  • the stabilizing device 5 or their elements of an elastic material for example. Plastic, be formed.
  • the cabin air filter 2 is inserted into a filter housing 3 of the assembly 1 via an insertion opening 3a.
  • the insertion into the filter housing 3 can take place in a direction parallel to the pleat extension (as illustrated by way of example on the top right) or perpendicularly thereto (as illustrated, for example, below on the right).
  • the cabin air filter 2 can be clamped on its opposite sides 19, 20.
  • the seal between the free fold end edge 21, 21 'or the sides 19, 20 and the walls 27 of the filter housing 3 may be provided such that less than 3%, more preferably less than 1% and even more preferably less than 0.1% of an upstream air volume flow L flow between the cabin air filter 2 and the filter housing 3.
  • the walls 27 may have the pin 26 of FIG. 1A.
  • the interior filter 2 could then be inserted from above into the filter housing 3 in FIG. 5A at the bottom right and not pushed in.
  • FIG. 6 shows a perspective view of a section in the region of a wall 27 from FIG. 5A according to one embodiment.
  • the wall 27 comprises a plurality of lugs 53, which project from the wall 27 and protrude into a respective fold gap 25.
  • the folds 29, 30 of the interior filter 2 are with their respective two end edges 21, 21 'against a respective associated nose wings 54 laterally, whereby the desired seal is provided.
  • the lugs 53 and / or the entire wall 27 can be produced, for example, from polyurethane (PU) foam or another plastic.
  • FIG. 7A shows a perspective view of a detail in the region of a wall 27 from FIG. 5A according to a further embodiment.
  • Fig. 7B shows a section VII-VII of Fig. 7A.
  • the wall 27 is formed with a groove 55, which follows the profile of the Faltenstirnkanten 21, 21 ', thus according to the present embodiment has a zigzag course.
  • the groove 55 may, as shown in Fig. 7B, taper, so for example have a triangular cross-section.
  • the folds 29, 30 dive with their fold end edges 21, 21 'in the groove 55, wherein it comes in particular due to a clamping of a respective fold end edge 21, 21' in the groove 55 due to its tapered shape to the desired seal.
  • the groove 55 and / or the entire wall 27 may be made of polyurethane (PU) foam or another plastic, for example.
  • PU polyurethane
  • Another embodiment provides to form the wall 27 of a nonwoven or to coat with such.
  • the applied against the fleece pleat front edges 21, 21 ' provide in this embodiment, the desired seal.
  • FIG. 8A shows a section VIII-VIII of FIG. 5A according to one embodiment.
  • FIG. Shown is the fold end of a fold 29 transversely to the machine direction M.
  • the fold end comprises an edge region 42 and a further inward region 43.
  • the width B of the edge region 42 may be, for example, between 1 and 3 mm.
  • the edge region 42 has no adsorption layer 50 with activated carbon in order to avoid accidental trickling out when handling and operating the interior filter 2.
  • the adsorption layer 50 can either not be provided in the edge region 42 during the production of the filter medium 4 (corresponds to a recess of the edge region 42) or, alternatively, be removed later.
  • an increased amount of adhesive can be introduced into the edge region 42 instead of the activated carbon. This can be done, for example, via an application device 56 shown in FIG. 8D. This has in a corresponding edge region 42 'more adhesive nozzles than in a corresponding inner area 43 'on.
  • the removal of the adsorption layer 50 from the edge region 42 can be done in particular by brushing out or trickling out (in particular gravity-assisted) of the activated carbon.
  • Adhesive substance application preferably takes place only in the area 43 located further inward, but not in the edge area 42.
  • both areas 42, 43 can nevertheless be coated with activated carbon in the production process, with the activated carbon subsequently being removed from the edge area 42 becomes.
  • edge region 42 bends or bends upward or downward, as shown in FIG. 8B, and the folding end edge 21 bears at least partially against the wall 27 in a sealing manner , Or, but the edge region 42 is compressed against the wall 27 (as shown in Figure 8C), whereby the desired seal is achieved.
  • the adsorbent layer 50 is not removed.
  • the edge region 42 or also the entire filter medium 4 is sealed, in particular at the fold end edges 21, 21 'thereof (indicated here by way of example by a weld seam 57).
  • sealing by ultrasonic welding or hot air welding, also using additional material, for example an additional nonwoven, and / or using a shearing device (in particular conical ring) which simultaneously cuts and welds (thereby enabling one cut / Welding process a filter medium raw material are cut, the outer edges of the filter medium 4 are generated and sealed, see the weld 57); Seal using wax, dispersion adhesive (Hirschleim), two-component adhesive or hot melt adhesive. The sealing then takes place, for example, in an identical manner, as described in connection with FIGS. 8B and 8C.
  • the sealing may also be combined with the embodiment in which the adsorption layer 50 in the edge region 42 is removed or recessed (FIG. 8A).
  • the sealing along the edge region 42 ie, into the plane of the paper or along the course of the end edges 21, 21 '
  • the sealing along the edge region 42 at least in a region 58 on the outside behind one end (transversely to the machine direction M, see Fig. 5A) of the adsorption 50th or over the entire edge region 42.
  • the sealing and / or removal / omission of the adsorption layer 50 in the edge region 42 can take place before or after the folding (pleating) of the filter medium 4.
  • FIG. 9A illustrates in a plan view a trapezoidal filter housing 3, in which a - in a relaxed state rectangular - interior filter 2 (FIG. 9B) is inserted and preferably held there at least partially clamped.
  • a space for carrying out 59 or the like (eg. In a motor vehicle) are created.
  • This deformability advantageously results from the fact that the interior filter 2 has no stabilization device and / or sealing devices which impede the deformation.
  • FIGS. 10A and 10B also show an embodiment which benefits from the good deformability of the present cabin filter 2.
  • the filter housing 3 of FIG. 10A has a rectangular insertion opening 3a.
  • the filter element 2 from FIG. 10B is forcibly guided into a (lying) S-shape.
  • the filter housing may have guide means 60.
  • the purpose of the S-shape is the creation of a free space for the passage of cables 59 to be omitted or the like (for example in a motor vehicle).
  • FIGS. 11A and 11B illustrate an embodiment in which a rectangular filter element 2 is pushed through a channel 61 into a filter housing 3 trapezoidal in plan view. Since the channel 61 has smaller dimensions than the cabin filter 2 in its relaxed state, the cabin filter 2 must be compressed before pushing through. In the filter housing 3, the cabin air filter 2 is then held in an only partially relaxed state - this is because of deviating from the interior filter 2 geometry of the filter housing 3. In particular, because of its on its sides 19, 20 strained state of the cabin air filter 2 in the filter housing is a achieved good sealing effect.
  • FIG. 12 shows, in a schematic cross section, a filter housing 3 with a dumbbell-shaped cross section.
  • a filter housing 3 with a dumbbell-shaped cross section.
  • the cabin filter 2 may also be formed with a varying fold height H, so that the cabin filter 2 itself has a dumbbell-shaped cross section even in its relaxed state.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

Filtre d'habitacle (2) comprenant un moyen de filtration (4) plissé et au moins une couche d'adsorption (50) comprenant du charbon actif, le moyen de filtration (4) présentant au moins une arête de front de pli (21, 21') libre qui est conçue pour assurer l'étanchéité contre une paroi (27) d'un boîtier de filtre (3) destiné à recevoir le filtre d'habitacle (2).
PCT/EP2017/064603 2016-06-21 2017-06-14 Filtre d'habitacle et ensemble de filtration WO2017220415A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112017003069.2T DE112017003069A5 (de) 2016-06-21 2017-06-14 Innenraumfilter und Filteranordnung

Applications Claiming Priority (2)

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DE102016007460.4 2016-06-21
DE102016007460.4A DE102016007460A1 (de) 2016-06-21 2016-06-21 Innenraumfilter und Filteranordnung

Publications (1)

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WO2017220415A1 true WO2017220415A1 (fr) 2017-12-28

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DE (2) DE102016007460A1 (fr)
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19632618A1 (de) * 1996-08-13 1998-02-19 Freudenberg Carl Fa Filtereinsatz sowie Verfahren zu seiner Herstellung
FR2812379A1 (fr) * 2000-07-28 2002-02-01 Valeo Dispositif de filtration destine a equiper un appareil d'aeration et/ou de chauffage et/ou de climatisation, notamment pour vehicule automobile
DE10249577A1 (de) * 2002-10-24 2004-05-13 Helsa-Werke Helmut Sandler Gmbh & Co. Kg Filterelement
DE102005048841B3 (de) 2005-10-12 2007-07-05 Daimlerchrysler Ag Luftfilter für eine Belüftungsanlage eines Kraftfahrzeugs
DE202006018863U1 (de) 2006-12-12 2008-04-17 Mann+Hummel Gmbh Filterelement mit Aktivkohlebeschichtung
DE102011117842B3 (de) 2011-09-16 2012-11-29 Carl Freudenberg Kg Filterelement mit einem Faltenwände durchbrechenden Führungsschacht

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19632618A1 (de) * 1996-08-13 1998-02-19 Freudenberg Carl Fa Filtereinsatz sowie Verfahren zu seiner Herstellung
FR2812379A1 (fr) * 2000-07-28 2002-02-01 Valeo Dispositif de filtration destine a equiper un appareil d'aeration et/ou de chauffage et/ou de climatisation, notamment pour vehicule automobile
DE10249577A1 (de) * 2002-10-24 2004-05-13 Helsa-Werke Helmut Sandler Gmbh & Co. Kg Filterelement
DE102005048841B3 (de) 2005-10-12 2007-07-05 Daimlerchrysler Ag Luftfilter für eine Belüftungsanlage eines Kraftfahrzeugs
DE202006018863U1 (de) 2006-12-12 2008-04-17 Mann+Hummel Gmbh Filterelement mit Aktivkohlebeschichtung
DE102011117842B3 (de) 2011-09-16 2012-11-29 Carl Freudenberg Kg Filterelement mit einem Faltenwände durchbrechenden Führungsschacht

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DE102016007460A1 (de) 2017-12-21

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