WO2022023512A1 - Filterelement mit zickzackförmig gefaltetem filtermedium mit diskontinuierlicher stirnkantenverklebung sowie verfahren zum herstellen eines solchen - Google Patents
Filterelement mit zickzackförmig gefaltetem filtermedium mit diskontinuierlicher stirnkantenverklebung sowie verfahren zum herstellen eines solchen Download PDFInfo
- Publication number
- WO2022023512A1 WO2022023512A1 PCT/EP2021/071361 EP2021071361W WO2022023512A1 WO 2022023512 A1 WO2022023512 A1 WO 2022023512A1 EP 2021071361 W EP2021071361 W EP 2021071361W WO 2022023512 A1 WO2022023512 A1 WO 2022023512A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- filter
- filter element
- adhesive
- bonding
- filter medium
- Prior art date
Links
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
- B01D46/0001—Making filtering elements
-
- 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
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
- B01D46/106—Ring-shaped filtering elements
-
- 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
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2411—Filter cartridges
-
- 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
- B01D2265/00—Casings, housings or mounting for filters specially adapted for separating dispersed particles from gases or vapours
- B01D2265/04—Permanent measures for connecting different parts of the filter, e.g. welding, glueing or moulding
-
- 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
- B01D2271/027—Radial sealings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2275/00—Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
- B01D2275/20—Shape of filtering material
- B01D2275/206—Special forms, e.g. adapted to a certain housing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
- B01D2279/30—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for treatment of exhaust gases from IC Engines
Definitions
- the invention relates to a filter element for filtering a fluid, in particular air, with a filter medium folded in a zigzag shape, which is provided with a front edge bond to seal its fold ends.
- the invention relates to a method for producing such a filter element.
- the intake air from internal combustion engines is passed before entering the engine as usual through an air filter with a filter housing and a filter arranged therein Fil terelement to separate dirt particles contained in the intake air from the intake air.
- an air filter has become known for example from DE 102 31 696 A1.
- the filter element has the shape of a flat cuboid and includes a filter medium made of paper or non-woven filter material that is folded in a zigzag shape. The folds on one side of the filter medium delimit a main filter area for the raw air side of the filter element and the folds lying in the parallel plane on the opposite side of the filter element delimit the filter area for the clean air side.
- end edge bonding which can be realized, for example, by applying a hot-melt adhesive bead to the filter medium, spray bonding, PUR foam application or so-called sideband bonding.
- DE 10 2016 217 458 A1 discloses a trapezoidal or triangular air filter insert with a filter material folded in a zigzag shape, which does not have parallel side edges but tapers in one direction.
- sealing traces of adhesive run orthogonally to the fold axes and offset from one another in the axial direction. Adjacent traces of adhesive do not bond common folds, but may terminate at a convex fold apex of adjacent folds.
- US 2018/0207566 A1 describes a filter with a filter medium that is folded too deep, with the folds being held at a distance from one another by beads of adhesive. Mutually opposite radial outer sides can be sealed by a continuous bead of adhesive which follows a curved course of the outer sides.
- the zigzag folded filter media are mostly made from a cut filter medium. If a bead of adhesive is used to form the end edge bond, the filter medium blank is usually first pre-folded and then unfolded again, in order to then close it with the adhesive bead along its two opposite long sides, which form the end edges of the subsequent folds Mistake. After the filter medium blank has been erected (i.e. folded) again, the front edge can be bonded.
- the filter elements sometimes have to have a shape that deviates from the classic - strictly cuboid or strictly circular-cylindrical - design.
- the installation space available for the filter element of a filter housing provided for accommodating the filter element can be used comprehensively. If the filter element or its filter body formed from the filter medium has, for example, an outer contour with one or more recesses, such as steps, slopes or indentations, the aforementioned bonding of the front edges by means of a bead of adhesive is made more difficult.
- the application of adhesive to the filter medium cut requires the use of two-dimensional, highly dynamic, movable adhesive application devices along a non-linear adhesive application path following the return and/or an adhesive application path that runs obliquely in relation to the movement axis along which the filter medium cut and the adhesive application device are moved during the application of the adhesive. which are complex, prone to wear and failure and therefore expensive.
- filter elements require that the filter element blanks and an adhesive application device used in each case be moved relative to one another at high speed, which devices cannot usually be reproduced with the aforementioned movable adhesive application devices.
- the adhesive application path along the longitudinal side of the filter medium blank that has the recess must not exceed a maximum angle relative to the application direction or longitudinal extent of the filter medium blank, so that the adhesive bead sections or adhesive application segments come into contact with one another on opposite flanks of the folds of the filter medium to be formed when the filter medium blank is set up and can connect to each other in a fluid-tight manner. Otherwise there may be leaks and thus an increased reject rate in the production of the filter elements.
- a method for manufacturing such a filter element is to be specified.
- the object relating to the filter element is achieved according to the invention by a filter element having the features specified in claim 1 .
- the method according to the invention for producing such a filter element is specified in claim 15 .
- the filter element according to the invention serves to filter a fluid, in particular air, in particular the intake air of an internal combustion engine or also the fresh air for the vehicle interior of a motor vehicle, rail vehicle or the like.
- the filter element has a filter medium folded in a zigzag shape, which is provided with an end edge adhesive to seal its fold ends.
- the front edge bonding is discontinuous in the area of a recess of the outer contour of the filter medium; in other words, the end edge bonding has interruptions in the course of the end edge bonding or consists of several separately formed adhesive track sections. Described clearly, the production of the end edge bonding is carried out by means of a process with time and/or spatial interruptions.
- the folds of the filter element extend in the fold direction between two opposite longitudinal sides. Transverse to the direction of the folds, the folds follow one another between two opposite end faces.
- the end edge bonding comprises at least one outside in the direction of the folds, i. H. first bonding segment arranged adjacent to a longitudinal side.
- the first bonding segment preferably follows the outer contour of the bellows in the direction transverse to the direction of the folds, in particular in a straight line.
- the first bonding segment is preferably discontinuous in the area of a recess.
- the end edge bonding comprises at least one second bonding segment arranged on the inside in the direction of the folds, the second bonding segment being arranged at a distance from the first bonding segment in the transverse direction to the direction of the folds, and the two bonding segments bonding at least one common fold.
- the bonding segments are therefore arranged at a distance from one another in the direction of the folds and typically do not touch one another.
- the bonding segments are spaced apart from one another in the direction of the folds and in the direction transverse to the direction of the folds, in particular end points of the bonding segments being spaced apart from one another in the direction transverse to the direction of the folds.
- a fold within the meaning of the invention is an area of the filter medium which runs on the clean side from the peak of the fold to the peak of the fold and thus comprises a fold peak, a fold valley and a further, second fold peak in the sequence.
- the end edge bonding must fully bond at least the fold cut by the cut-out transversely to the direction of the folds. Transverse to the direction of the folds, both tips that form the fold on the clean side must be glued.
- the production of the filter element can be simplified in terms of process technology and implemented more cost-effectively overall.
- the use of the aforementioned highly dynamic adhesive application device is no longer necessary.
- the adhesive can be applied to the filter medium blank with little technical effort, for example by means of a conventional adhesive application device with a plurality of stationary application nozzles.
- a large functionally usable filter surface of the Fil ter stressess can be realized.
- the sealing effect of the front edge bonding is basically only achieved together by the first and second bonding segment.
- the first adhesive segment alone is not sufficient to seal the end edges on one longitudinal side of the filter body.
- Adhesive according to the invention is a non-metallic substance that can connect materials by surface adhesion (adhesion) in such a way that the connection has sufficient internal strength (cohesion).
- the adhesive is preferably based on one or more organic compounds.
- the adhesive is particularly preferably a hot-melt adhesive (also called hot-melt), the hot-melt adhesive being a thermally meltable adhesive system which develops cohesion (internal strength) as it cools.
- Hot melt adhesives can be thermoplastic or reactive.
- Thermoplastic hot-melt adhesives can be reversibly melted. Reactive hot-melt adhesives show chemical crosslinking reactions during or after cooling.
- Suitable base polymers for hot melt adhesives include polyamides (PA), polyethylene (PE), amorphous polyalphaolefins, ethylene vinyl acetate (co)polymers (EVAC), polyester elastomers (TPE-E), polyurethane elastomers (TPE-U), copolyamide elastomers (TPEA), and vinylpyrrolidoneA/inyl acetate copolymers.
- the recess of the outer contour of the filter medium can be designed as a step, a slope, a rounding or as an indentation.
- an indentation is understood to be a depression in the edge section of the filter medium that is angular or concavely curved in the direction of the respectively opposite edge section.
- the second bonding segment is arranged with its two end sections on both sides of the indentation (in the direction of the long side provided with the front edge bonding) in each case transversely to the fold direction, the front edge bonding overlapping with a first bonding segment of the front edge bonding.
- the outer contour can be curved at least in some areas—concave for an indentation as mentioned above; convexly curved for a rounding. If the recess is formed in a corner area of the filter body, it is sufficient here a one-sided overlap of the second bonding segment with the first bonding segment. It should be noted that every second bonding segment covers the return perpendicular to the direction of the folds at least partially, in the case of a single second bonding segment completely.
- the filter element can be provided with a through-hole and/or with a front-side recess, the folds on both sides of the through-hole being sealed by gluing their end edges pointing to the passage recess or the front-side recess.
- This bond can also be produced in a simple and cost-effective manner in a manner corresponding to the end edge bond of the old type by applying adhesive with stationary adhesive application nozzles.
- the first bonding segment follows the outer contour of the filter body in a straight line.
- the first bonding segment follows linearly, in particular is arranged parallel to the outer contour.
- the second bonded segment is discontinuous to the first bonded segment.
- the arrangement has interruptions; in other words, the front edge bonding has interruptions in the course of the front edge bonding. Described clearly, the release of the second bonding segment takes place by means of a process with temporal and/or spatial interruptions.
- the second bonding segment runs in a straight line transversely to the direction of the folds, as a result of which the advantages are further optimized.
- the second bonding segment can be curved. In this way, the second adhesive segment can follow its curved course in the event of a larger recess in order to further maximize the usable filter area.
- the first and/or second bonding segment can be discontinuous. In other words, they can each consist of several separate sections.
- first and/or the second bonding segment are designed to be continuous.
- the discontinuity of the end edge bonding manifests itself in the spaced apart arrangement of the two bonding segments.
- one bonding segment protrudes transversely to the direction of the folds at least at one end over the other bonding segment. This embodiment is particularly suitable for filter elements where the recess is a rounding.
- the second bonding segment which is arranged at a distance from the first bonding segment in the transverse direction to the fold direction, begins and ends at least with the outer contour of the respective recess or begins and ends at a distance from this outer contour.
- the recess of the outer contour is arranged in a corner area of the filter body.
- the outer contour of the filter body has a number of recesses.
- the filter medium has a diameter Gangsausnaturalung on, the folds of the filter body on both sides of the through-hole recess towards the through-hole are sealed by additional bonding ist.
- the end edge bonding can have a plurality of second bonding segments spaced apart from one another in the transverse direction to the direction of the folds. Pairs of adjacent second bonding segments each bond at least one common fold. In this way, the recess can be sealed in a stepped manner. This is particularly advantageous with larger recesses in order to increase the usable filter area.
- the filter element can be designed as a so-called plate or flat filter element or, alternatively, as a round filter element.
- the filter medium spans a filter plane.
- the filter medium or the filter body formed from it is arranged in a ring around the longitudinal axis of the filter element and preferably in a direction radial to the longitudinal axis of the fluid to be filtered can flow through.
- the filter medium of the round filter element can be arranged between two end plates and can be glued or welded to the end plates or can be arranged embedded in the material of the end plates.
- the plate or flat filter element can be oval, stadium-shaped or round as a whole or in some areas.
- the filter element can have a peripheral seal, preferably arranged on the clean side.
- the seal on the clean side can, for example, be glued, welded, foamed or injection molded onto the filter body.
- the seal preferably consists of a rubber-elastic deformable material.
- the seal is particularly preferably made of PUR (polyurethane), in particular closed-cell polyurethane foam. From the outer contour, the seal in the region of the recess covers at least one fold transversely to the direction of the fold, which is glued by both the first adhesive segment and the second adhesive segment. On the one hand, the seal prevents air from flowing past the side of the filter body. For this purpose, the seal can rest against a filter housing.
- the seal prevents air from flowing between pairs of adjacent bonded segments into folds that are trimmed to form the setback are.
- the seal preferably covers at least three folds that are bonded together by a pair of bonding segments. This is advantageous in terms of tolerances in the manufacturing process.
- Filter element comprises the following steps: a) providing a filter medium blank to be folded in a zigzag shape to form the filter body along predetermined fold lines which extend from a first longitudinal side of the filter medium blank to an oppositely arranged second longitudinal side; b) creating at least one recess in the area of one of the two longitudinal sides of the filter medium blank; c) defining in each case a first linear adhesive application path along each of the two longitudinal sides of the filter medium blank, the two adhesive application paths being arranged parallel to one another and one of the two adhesive application paths intersecting the at least one recess; d) defining a second linear line of adhesive along the longitudinal side of the filter media blank including the recess, the second line of adhesive being disposed intermediate and spaced from the first two lines of adhesive without intersecting the return; e) Application of adhesive to the filter medium cut along the first two adhesive application lines, with the adhesive application along the first adhesive application line following the outer contour of the filter medium cut in the transverse direction to the direction of the folds and being interrupted or broken off in
- the filter element can be manufactured in a simple and cost-effective manner and with simple technical means as a result of the manufacturing method according to the invention.
- the adhesive can thus be applied to the filter medium blank with only a small amount of technical effort via a number of adhesive application nozzles, which can be arranged at invariant distances relative to one another.
- the high relative speed required in the mass production of filter elements, with which the respective filter element blanks are guided past the adhesive application device can be realized without further ado.
- the respective adhesive application nozzles must be provided with an adhesive dispensing valve that has a corresponding response time.
- flot speed valves have been established on the market for some time and are freely available.
- FIG. 1 shows a plate filter element with a filter body with a filter medium folded in a zigzag shape, the filter body having an outer contour with recesses and the folds of the filter body being sealed off towards the longitudinal side by a discontinuous end edge adhesive bond, in a perspective view;
- FIG. 2 shows the filter element according to FIG. 1 in a plan view
- FIG. 3 shows the filter body of the filter element according to FIG. 1 in a cut-out plan view
- 4 shows a round filter element with a filter body with a filter medium folded in a zigzag shape, the filter body having an outer contour with a recess and being provided with a discontinuous end edge bond in the region of the recess;
- FIG. 5 shows the filter medium of the filter body according to FIG. 4 in a partially developed state, in plan view.
- FIG. 6 shows an adhesive application device for applying adhesive to a filter medium blank for a filter element according to FIG. 1 or 4, in top view;
- FIG. 7 shows individual method steps of a method according to the invention for fixing a filter element
- FIG. 8 shows a flat-oval filter element, a filter body having recesses in the form of rounded portions on its outer contour, which are sealed by a plurality of adhesive segments spaced apart from one another, in a perspective view;
- FIG. 9 shows the filter body of the filter element according to FIG. 8 in a cut-out top view, with a rounded shape of the longitudinal sides being discernible;
- FIG. 10 shows a similar filter element as in FIG. 8 in a perspective view
- FIG. 11 shows the filter body of the filter element according to FIG. 10, with longitudinal sides being formed in a straight line in some areas, in an isolated top view.
- a filter element 10 is shown, which is in the form of a so-called
- the longitudinal axis of the filter element 10 is denoted by 12 .
- the filter element 10 can in particular be used as an air filter element for filtering air for an internal combustion engine or as an interior air filter be carried out of a motor vehicle. Other technical areas of application are conceivable.
- the flat filter element 10 has a filter body 14 which is formed by a filter medium 18 folded in a zigzag shape along folds 16 .
- the folds 20 of the filter medium 18 each extend along a fold direction 22 running orthogonally to the longitudinal axis 12 of the filter element.
- the filter medium 18 can consist, for example, of a cellulose material or another suitable material. Depending on the application, the filter medium 18 can have one or more layers. If required, the filter medium can be provided with a coating (not shown).
- the filter element 10 has an upper side 24 and an underside 26, longitudinal sides 28 arranged opposite one another in pairs and end faces 30 arranged opposite one another in pairs.
- the filter medium 18 can flow through the respective fluid to be filtered in the direction of the flow axis designated 32 .
- a circumferential seal 34 is arranged on the filter body 14 .
- the seal 34 can be glued, welded, foamed or sprayed onto the filter body 14, for example.
- the seal 34 is preferably made of an elastically deformable material such as PUR (polyurethane). It goes without saying that the seal 34 can also have a different shape for the purpose of an adequate sealing fit on the respective sealing surfaces of a filter housing provided for accommodating the filter element 10 and can be provided, for example, with at least one or more radially and/or protruding sealing lip(s). .
- the filter element 10 or the filter body 14 has, according to FIGS.
- the respective recess 38 is designed in the form of an indentation 44, which is rounded here by way of example.
- a frontal further recess 38 formed on the filter body is designed in the same way as an indentation 44 .
- the indentations 44 can also have a different shape and, for example, can be of angular design.
- the seal 34 preferably follows the outer contour 36 of the filter body 14.
- the filter body 14 can be provided with a through-hole 46 . This can be used, for example, to reach through a fastener or another construction part of a filter housing (not shown), which is provided for receiving the filter element.
- a sealing element 48 can be arranged in the area of the through-hole 46 .
- the sealing element 48 can be welded to the filter body 14 or the filter medium 18 in a manner corresponding to the seal 34 , glued to the filter body 14 or the filter medium 18 , molded or foamed on.
- Such a front edge bonding 50 also serves to stiffen and mutually mechanically stabilize the folds 20 of the filter medium 18. It should be noted that the front edge bonding is discontinuous in the area of a respective recess 38 of the outer contour 36 of the filter body 14. The end edge bonding does not extend here from one end face 30 of the filter body 14 to the other.
- the front edge bond 50 extends in the area of the longitudinal sides 28 along an outer contour section 36a of the filter body 14, which extends in particular in a straight line and—in relation to the longitudinal axis 12—parallel. following here transversely to the fold direction 22), and in particular running at a distance from the outer contour section 36a, in particular running parallel, on an ordered outer first bonding segment 52.
- the first bonding segment 52 is preferably designed to run linearly. It should be noted that the first bonding segment 52 preferably extends up to or almost up to the recess 38 of the outer contour 36 . The bonding segment 52 is thus discontinuous in relation to the recess 38 with respect to the outer contour 36 .
- the folds 20 running towards the recess 38 are at least partially, preferably completely, sealed by a second adhesive segment 54.
- the second bonded segment 54 is arranged offset in the fold direction relative to the first bonded segment 52 inwards, ie towards the respective other longitudinal side 28 .
- the second bonding segment 54 is arranged at a distance from the first bonding segment 52 in the direction transverse to the direction of the folds.
- the two bonded segments 52, 54 bond at least one common fold 20.
- the first or first bonded segment(s) 52 and the respectively assigned second bonded segment 54 can preferably be spaced uniformly from the outer contour of the filter body.
- the folds 20 of the filter body through which the through-hole 46 passes are sealed towards the through-hole by a respective adhesive bond 56 .
- the bonds 56 are also linear and run strictly axially.
- FIG. 4 shows a further exemplary embodiment of a filter element 10 according to the invention, which is designed in the form of a so-called round filter element.
- the Fil terelement 10 has a to the longitudinal axis 12 of the filter element 10 annularly angeord Neten filter body 14 made of a zigzag folded filter medium 18 on.
- the Fil ter stresses 14 thus completely surrounds the longitudinal axis 12 of the filter element in a direction radial to the longitudinal axis 12 .
- the fluid to be filtered can flow through the filter body 14 in a direction radial to the longitudinal axis 12, preferably from the outside inwards.
- the filter medium 18 can be arranged held between two end plates 58 in the axial direction.
- the filter medium 18 can be glued to the end disks 58, welded or embedded in the material of the end disks 58.
- the front edge bonding 50 is also here in the area of the rear jump 38 of the outer contour 36 of the filter medium 18 or filter body 14 discontinuously executed. 5 shows the filter medium 18 in the unwound but still folded state.
- the first and second bonding segments 52, 54 of the front edge bonding 50 which run in the circumferential direction and are offset from one another in the direction of the folds 20, in the region of the shown recess 38 of the outer contour 36 of the filter medium 18 are clearly visible.
- An adhesive application device 60 which is shown in a highly schematic manner and only in part, is used to fix a filter element shown above in connection with Figures 1 to 4.
- the adhesive application device 60 enables the targeted application of adhesive to a filter medium blank 62, from which the respective filter body 14 of the filter element designed as a plate filter element or round filter element.
- the filter medium blank 60 therefore corresponds to the respective filter medium 18 of the filter element in the unwound state.
- the adhesive applicator device has a plurality of nozzles 63, which are used for the targeted application of adhesive to the filter medium blank 62, which is required for bonding the end edges and for bonding the folds 20 of the filter medium that are to be formed.
- a first step 102 the filter medium blank 62 is provided, which is to be folded in a zigzag shape along predetermined folding lines 64 which extend from a first longitudinal side 28 to an oppositely arranged second longitudinal side 28 of the filter medium blank 62 .
- the fold lines 64 can be embossed into the material of the filter medium blank 62 if required.
- a further step 104 at least one recess 38 in the area of one of the two longitudinal sides 28 or a corner area 40 of the filter medium blank 62 is produced, in particular punched out.
- a first linear adhesive application path 66 is defined or specified along both longitudinal sides 28 of the filter medium blank 62, where in which the first two adhesive application webs 66 are arranged parallel to one another and at least one of the two adhesive application webs 66 intersects the rear jump 38 .
- a second linear adhesive application path 68 is defined along the long side 28 of the filter medium blank 62 that has the recess 38, the second adhesive application path 68 being arranged between the two first adhesive application paths and running at a distance from them, without closing the recess 38 to cut.
- adhesive 70 is applied to the filter medium blank 62 along the two first adhesive application lines 66, with the application of adhesive along the first adhesive application line 66 following the outer contour of the filter media blank 62 transversely to the direction of the folds and being interrupted in the area of the at least one recess 38 or broken off and instead adhesive is applied along the second adhesive application line 68 on the filter medium blank 62 in such a way that the adhesive application is applied along the second adhesive application line 68 in the direction transverse to the fold direction at a distance from the first adhesive application line 66 and the two adhesive application lines 66, 68 have at least one common fold of the filter medium blank 62.
- the filter medium blank 62 is folded in a zigzag to form the filter body 14, so that the fold ends of the filter body 14 or of the filter medium 18 are sealed by means of the end edge bond 50 formed by the set adhesive 70.
- the seal 34 is attached to the filter body 14 . This can be done by gluing, welding, or by spraying or foaming the seal 34 on the filter body 14 .
- FIG. 8 shows another filter element 10 which is essentially oval in plan view. More precisely, the cross-section of the filter element 10 is stadium-shaped with two rounded and two parallel sides.
- a filter body 14 of the filter element 10 is shown in FIG.
- the filter body 14 has a multiplicity of folds 20 following one another in the longitudinal direction 12 . Flow can flow through the filter element 10 in the direction of a flow axis 32 (from bottom to top in FIG. 8).
- a circumferential seal 34 is attached to the filter body 14 on the clean side. When installed, the seal 34 seals the filter element 10 against a filter housing, not shown.
- the filter body 14 can be surrounded by a peripheral border 72 .
- the border 72 can serve to seal and stabilize or protect the filter body 14 on the raw side.
- a jacket surface of the filter body 14 can be surrounded by a sleeve 74 .
- Sheath 74 is engageable with seal 34; in particular, the shell 74 may have a portion that serves as a seal carrier.
- the sleeve 74 can have elements 76 on both sides to support the positioning of the filter element 10 in the filter housing. Element 76 may be in the form of a round pin.
- the sleeve 74 can have a grip element 78 for gripping the filter element 10 .
- the filter body 14 is oval with two parallel sides.
- the filter body 14 has recesses 38 in the form of convex roundings 80 in corner areas 40 .
- First bonding segments 52 of a front edge bond 50 run on longitudinal sides 28 of the outer contour 36.
- the first bonding segments 52 extend in the longitudinal direction 12 or transversely to the fold direction 22 and follow the contour of the longitudinal sides 28 at a variable distance.
- the first bonding segments 52 are here designed to be continuous and each extend between two opposite recesses 38 in the longitudinal direction 12.
- the filter body has a plurality of second adhesive segments 54 within the two first adhesive segments 52 in the fold direction 22 .
- the second bonding segments 54 can also extend continuously between opposite recesses 38 or end faces 30 in the longitudinal direction 12 .
- the filter body 14 can have one or more third bonding segments 82 .
- the third Bonding segments 82 can extend continuously between opposite end faces 30 in the longitudinal direction 12 .
- the first, second and third bonding segments 52, 54, 82 are each formed in a straight line and parallel to one another.
- the first bonding segments 52 could also be curved like the outer contour 36 (not shown in more detail).
- the filter body 14 is stabilized by the continuous course of the second and third bonding segments 54, 82 in the longitudinal direction 12 (here transversely to the fold direction 22). Furthermore, the continuous adhesive segments 52, 54, 82 guide the air flow parallel to the flow axis 32.
- the bonding segments 52, 54, 82 are each spaced apart. In other words, adjacent bonding segments 52, 54, 82 do not touch one another. In this respect, the bonding segments 52, 54, 82 of the front edge bonding 50 are dis continuous with respect to one another.
- Adjacent pairs of first and second bonding segments 52, 54 each bond at least one common fold. Due to the continuous course, first and second bonding segments 52, 54 that are adjacent in pairs bond here in each case all folds 20 in the region of the extension of the shorter bonding segment in each case.
- the seal 34 extends from the outer contour 36 or from the end faces 30, transversely to the direction of the folds 22, a little way inwards.
- the seal 34 covers at least one fold 20 each, which is bonded together by adjacent first and second bonding segments 52, 54. In other words, trimmed ends of folds 20 are covered by the seal 34 to form the recess 38 .
- the seal 34 protrudes inward over the fold 20 which is located furthest inward in the longitudinal direction 12 (in the transverse direction to the fold direction 22) and is jointly bonded by a pair of first and second bonding segments 52, 54.
- the seal 34 can have a stepped profile on the inside in the area of the recesses 38 .
- a lattice structure 84 can additionally stabilize the filter element 10 and in particular the seal 34 .
- the lattice structure 84 can engage in the seal 34 and also stabilize it.
- FIG. 10 shows a further filter element 10 with a filter body 14 shown in FIG. 11, which largely correspond in their construction to the filter element 10 of FIG. 8 or the filter body of FIG.
- longitudinal sides 28 of the filter body 14 run in a straight line.
- the first bonding segments 52 extend parallel to the rectilinear longitudinal sides 28.
- the border 72 also has a rectilinear course in the region of the longitudinal sides 28.
- the seal 34 and the sleeve 74 can be oval in shape, which means they can also be rounded in the area of the longitudinal sides 28 .
- the seal 34 can protrude from the first adhesive segments 52 in the fold direction 22 over the outer contour 36 of the filter body 14 . For the rest, reference is made to the previous description.
- the invention relates to a filter element 10 for filtering a fluid, in particular air, with a filter body 14 with a filter medium 18 folded in a zigzag shape, the folds 20 of which extend in a fold direction 22 and which is provided with a front edge bond 50 to seal its fold ends in the area of at least one recess 38 of an outer contour 36 of the filter body 14 has at least one first adhesive segment 52 arranged on the outside, and has a second adhesive segment 54 on the inside in the direction of the folds 22, wherein the first and the second adhesive segment 52, 54 are arranged at a distance from one another and wherein the Glue the two bonding segments 52, 54 at least one common fold 20.
- a seal 34, preferably on the clean side, of the filter element 10 can cover at least one fold 20 in the region of the recess 38 from the outer contour 36 transversely to the fold direction 22, which fold is bonded by both the first bonding segment 52 and the second bonding segment 54.
- the recess 38 can be a rounding running at least in sections around a flow axis 32 . Such an oval, z. B. stadium-shaped, or round Au Textur 36 of the filter element 10 can be obtained.
- the bonded segments 52, 54 Kings each extend in a straight line transverse to the fold direction 22.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202180042750.3A CN115666758A (zh) | 2020-07-31 | 2021-07-30 | 具有带不连续的端棱粘接部的锯齿形地折叠的过滤介质的过滤元件及用于制造这样的过滤元件的方法 |
EP21759255.9A EP4188579A1 (de) | 2020-07-31 | 2021-07-30 | Filterelement mit zickzackförmig gefaltetem filtermedium mit diskontinuierlicher stirnkantenverklebung sowie verfahren zum herstellen eines solchen |
BR112022021543A BR112022021543A2 (pt) | 2020-07-31 | 2021-07-30 | Elemento de filtro com meio de filtro dobrado em zigue-zague com ligação da borda frontal descontínua assim como processo para a produção de tal |
US18/091,164 US20230149842A1 (en) | 2020-07-31 | 2022-12-29 | Filter element comprising a filter medium folded in a zig-zag-shape with discontinuous end-edge bonding, and method for producing same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020120247 | 2020-07-31 | ||
DE102020120247.4 | 2020-07-31 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US18/091,164 Continuation US20230149842A1 (en) | 2020-07-31 | 2022-12-29 | Filter element comprising a filter medium folded in a zig-zag-shape with discontinuous end-edge bonding, and method for producing same |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022023512A1 true WO2022023512A1 (de) | 2022-02-03 |
Family
ID=77499806
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2021/071361 WO2022023512A1 (de) | 2020-07-31 | 2021-07-30 | Filterelement mit zickzackförmig gefaltetem filtermedium mit diskontinuierlicher stirnkantenverklebung sowie verfahren zum herstellen eines solchen |
Country Status (6)
Country | Link |
---|---|
US (1) | US20230149842A1 (de) |
EP (1) | EP4188579A1 (de) |
CN (1) | CN115666758A (de) |
BR (1) | BR112022021543A2 (de) |
DE (1) | DE102021119815A1 (de) |
WO (1) | WO2022023512A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4316628A1 (de) | 2022-08-06 | 2024-02-07 | Baldwin Filters, Inc. | Gekrümtes filtermedienpakete |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102022106562A1 (de) * | 2022-03-21 | 2023-09-21 | Mann+Hummel Gmbh | Filterelement und Filtersystem |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3622955A1 (de) * | 1986-07-09 | 1988-01-21 | Sueddeutsche Kuehler Behr | Verfahren zur herstellung eines luftfilters |
JPH0220774U (de) * | 1988-07-27 | 1990-02-13 | ||
DE10231696A1 (de) | 2002-07-13 | 2004-01-22 | B & S Industrieservice Gmbh | Filtereinsatz mit einer zu einem Faltenbalg gefalteten Filtermatte |
DE102017003997A1 (de) * | 2016-04-27 | 2017-11-02 | Mann+Hummel Gmbh | Flachluftfilterelement und Luftfilter |
DE102016217458A1 (de) | 2016-09-13 | 2018-03-15 | Röchling Automotive SE & Co. KG | Plissierter Gasfiltereinsatz für ein Kraftfahrzeug mit diskontinuierlich verklebten Filtermaterialschenkeln sowie Verfahren und Vorrichtung zu dessen Herstellung |
US20180207566A1 (en) | 2017-01-20 | 2018-07-26 | Champion Laboratories, Inc. | Filter packs, processes for making filter packs, and air filters comprising filter packs |
-
2021
- 2021-07-30 CN CN202180042750.3A patent/CN115666758A/zh active Pending
- 2021-07-30 DE DE102021119815.1A patent/DE102021119815A1/de active Pending
- 2021-07-30 BR BR112022021543A patent/BR112022021543A2/pt unknown
- 2021-07-30 WO PCT/EP2021/071361 patent/WO2022023512A1/de active Application Filing
- 2021-07-30 EP EP21759255.9A patent/EP4188579A1/de active Pending
-
2022
- 2022-12-29 US US18/091,164 patent/US20230149842A1/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3622955A1 (de) * | 1986-07-09 | 1988-01-21 | Sueddeutsche Kuehler Behr | Verfahren zur herstellung eines luftfilters |
JPH0220774U (de) * | 1988-07-27 | 1990-02-13 | ||
DE10231696A1 (de) | 2002-07-13 | 2004-01-22 | B & S Industrieservice Gmbh | Filtereinsatz mit einer zu einem Faltenbalg gefalteten Filtermatte |
DE102017003997A1 (de) * | 2016-04-27 | 2017-11-02 | Mann+Hummel Gmbh | Flachluftfilterelement und Luftfilter |
DE102016217458A1 (de) | 2016-09-13 | 2018-03-15 | Röchling Automotive SE & Co. KG | Plissierter Gasfiltereinsatz für ein Kraftfahrzeug mit diskontinuierlich verklebten Filtermaterialschenkeln sowie Verfahren und Vorrichtung zu dessen Herstellung |
US20180207566A1 (en) | 2017-01-20 | 2018-07-26 | Champion Laboratories, Inc. | Filter packs, processes for making filter packs, and air filters comprising filter packs |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4316628A1 (de) | 2022-08-06 | 2024-02-07 | Baldwin Filters, Inc. | Gekrümtes filtermedienpakete |
Also Published As
Publication number | Publication date |
---|---|
US20230149842A1 (en) | 2023-05-18 |
CN115666758A (zh) | 2023-01-31 |
EP4188579A1 (de) | 2023-06-07 |
BR112022021543A2 (pt) | 2023-02-28 |
DE102021119815A1 (de) | 2022-02-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2135662B1 (de) | Komprimierbares Filterelement mit zueinander geneigten Endklappen | |
EP3291909B1 (de) | Verfahren zum herstellen von filterbälgen | |
EP1409106B1 (de) | Verfahren zum herstellen einer verbindungsstelle bei einem filterelement | |
DE69916899T2 (de) | Filter mit kontinuierlichem bandrahmen | |
DE202009000969U1 (de) | Filterelement | |
WO2022023512A1 (de) | Filterelement mit zickzackförmig gefaltetem filtermedium mit diskontinuierlicher stirnkantenverklebung sowie verfahren zum herstellen eines solchen | |
EP2173461B1 (de) | Luftfilter, insbesondere für verbrennungsmotoren in kraftfahrzeugen | |
EP3071313B1 (de) | Filterelement mit filterbalg | |
DE10203460A1 (de) | In einen Staubsauger einsetzbare Filtereinrichtung | |
DE19736267C1 (de) | Verfahren zur Herstellung eines Filtereinsatzes | |
EP2676713B1 (de) | Gasfiltereinsatz | |
EP3449113A1 (de) | Flachluftfilterelement und luftfilter | |
EP2827967A1 (de) | Filterelement eines filters zur filtrierung von fluiden und filter | |
DE112010005044B4 (de) | Filterelement, Filtereinrichtung und Verfahren zum Herstellen eines Filterelements | |
DE102015013370A1 (de) | Filterelement, insbesondere für ein Kraftfahrzeug sowie Verfahren zum Herstellen eines Filterelements | |
WO2017144289A1 (de) | Filterelement, insbesondere zur gasfiltration | |
WO2015039993A1 (de) | Filteranordnung | |
WO2022023301A1 (de) | Filterelement und verfahren zum herstellen eines filterelements | |
EP1779916A1 (de) | Extrudierte Dichtung | |
DE4134367A1 (de) | Fluessigkeitsfilter | |
DE4215260C2 (de) | Quaderförmiges Filterelement | |
WO2016059013A1 (de) | Filterelement, insbesondere zur gasfiltration | |
WO1996036414A1 (de) | Filteranordnung | |
DE102012012349A1 (de) | Gasfiltereinsatz | |
EP1867378B1 (de) | Komprimierbares Filterelement |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21759255 Country of ref document: EP Kind code of ref document: A1 |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112022021543 Country of ref document: BR |
|
ENP | Entry into the national phase |
Ref document number: 112022021543 Country of ref document: BR Kind code of ref document: A2 Effective date: 20221024 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2021759255 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2021759255 Country of ref document: EP Effective date: 20230228 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |