WO2002040133A1 - Filter element - Google Patents

Filter element Download PDF

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Publication number
WO2002040133A1
WO2002040133A1 PCT/EP2001/012621 EP0112621W WO0240133A1 WO 2002040133 A1 WO2002040133 A1 WO 2002040133A1 EP 0112621 W EP0112621 W EP 0112621W WO 0240133 A1 WO0240133 A1 WO 0240133A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
filter medium
folds
stabilizing
filter element
Prior art date
Application number
PCT/EP2001/012621
Other languages
German (de)
French (fr)
Inventor
Markus Kolczyk
Gerhard SEIDER
Hans-Jörg Kaifel
Heiko Bock
Original Assignee
Filterwerk 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 Filterwerk Mann+Hummel Gmbh filed Critical Filterwerk Mann+Hummel Gmbh
Publication of WO2002040133A1 publication Critical patent/WO2002040133A1/en

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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
    • B01D46/52—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
    • B01D46/523—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material with means for maintaining spacing between the pleats or folds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/111—Making filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/15—Supported filter elements arranged for inward flow filtration
    • B01D29/21—Supported filter elements arranged for inward flow filtration with corrugated, folded or wound sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/52—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
    • B01D29/54—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection arranged concentrically or coaxially
    • 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
    • B01D46/0002—Casings; Housings; Frame constructions
    • B01D46/0013—Modules
    • 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
    • B01D46/24—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
    • B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • B01D46/58—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in parallel
    • B01D46/60—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in parallel arranged concentrically or coaxially
    • 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
    • B01D2265/06—Details of supporting structures for filtering material, e.g. cores

Definitions

  • the invention relates to a filter element according to the preamble of claim 1.
  • annular filter element which has a filter medium folded in a star shape.
  • the filter medium is supported on its inner circumference on a tubular support body provided with openings. So that the folds do not move and the filter element does not collapse at high differential pressures, an annular band is provided on the outer circumference of the filter element.
  • This ring band presses the folds against the support body, which prevents the folds from moving.
  • the ring band can consist of a material that shrinks under the influence of heat and thus stabilizes the folds.
  • a disadvantage of this embodiment is that the ring band can fall off at one point as a result of damage, as a result of which the support function is no longer provided. Furthermore, the ring band can constrict the filter medium when shrinking, as a result of which the filter medium kinks and the stability of the filter element is reduced.
  • the object of the invention is therefore to create a filter element which does not collapse even at high differential pressures and reliably supports the filter medium. This object is solved by the features of claim 1.
  • the filter element according to the invention is used to clean a fluid, in particular a liquid.
  • the filter element has a folded filter medium with two outer end faces, on which a filter limitation is arranged.
  • the filter medium is folded in a zigzag shape.
  • the outer end faces run essentially perpendicular to the folds, as a result of which the course of the folds can be recognized on the outer end faces.
  • the filter elements can also have a trapezoidal shape, with the diagonal the course of the folds can be seen in relation to the outer end faces of the folds.
  • the filter limitation is sealingly connected to the filter medium on the outer end faces, wherein the filter limitation can consist, for example, of a thermoplastic plastic such as polyethylene, an elastomer such as polyurethane or metal.
  • This filter limitation can be made in one part or in several parts and connected to the filter medium, for example, by its own material or by an adhesive.
  • the filter medium is formed by at least two adjoining filter medium parts, as a result of which the filter medium has at least two inner end faces.
  • the filter medium parts advantageously consist of the same filter material. At least both filter medium parts have the same filter fineness and filter the same impurities out of the fluid.
  • the course of the folds can be seen on the inner end faces. So that the filter element does not collapse even at high specific volume flows or differential pressures, a means for stabilizing the folds is provided.
  • This means for stabilizing the folds is sealingly connected to the filter medium parts on the inner end faces, which are arranged in a central region between the two outer end faces of the filter medium. As a result, the folds remain stabilized even if the means for stabilizing the folds is damaged at a single point.
  • the size of the individual filter medium parts must be selected.
  • a corresponding number of filter medium parts must be provided to achieve the required filter area.
  • the means for stabilizing the folds advantageously has a higher stability than the filter medium, as a result of which the folds can be optimally fixed.
  • the stabilizing means is disc-shaped, as a result of which as little filter area as possible is enclosed by the filter medium and the installation space for the filter element is not unnecessarily increased.
  • the disk-shaped means for stabilizing the folds is designed in such a way that it essentially corresponds to a surface projected from the inner end face or its outline.
  • the means for stabilizing the folds on the inner end faces is glued to the filter medium parts.
  • the adhesive on the one hand effects the connection between the means for stabilizing the folds and the filter medium parts and on the other hand the sealing, so that the raw side seals off the clean side is separated.
  • the means for stabilizing the folds can consist, for example, of metal and can be connected to the filter medium parts in a simple and inexpensive manner.
  • An expedient embodiment of the invention provides that the means for stabilizing the folds inextricably encloses at least one inner end face.
  • the means for stabilizing the folds can enclose the filter medium part in a positive or non-positive manner. By enclosing the inner end face, additional sealing components can be omitted.
  • the filter medium part can have openings in the area of the inner end face, through which the material of the agent for stabilizing the folds can pass and produce an inseparable connection after hardening.
  • a single means for stabilizing the folds is connected to the two adjacent filter medium parts on the inner end faces.
  • the two filter medium parts are fixed to one another, so that no leakage can occur due to a displacement of the two filter medium parts relative to one another.
  • the largest possible filter area can be realized in a given installation space.
  • a further embodiment of the invention provides that each filter medium part has its own means for stabilizing the folds on the inner end faces, the two means for stabilizing the folds being connected to one another in a sealing and non-detachable manner.
  • a filter element can be constructed in a modular manner, whereby corresponding standardized filter medium parts corresponding to the required size of the filter element can be assembled to the required size.
  • connection of the two means for stabilization to one another can take place mechanically, for example by rivets or snap connections, or chemically, for example by adhesive.
  • sealing elements such as sealing rings can be inserted between the two means for stabilizing the folds.
  • Another variant of the chemical bond is also conceivable, for example by dissolving a contact side with a solvent.
  • the means for stabilizing the wrinkles are pressed together on the contact side after they have been loosened.
  • the means for stabilizing the folds consists of a thermally softenable material, in particular nitrile rubber.
  • the filter element can be manufactured simply, quickly and inexpensively.
  • the thermally softenable material is placed, for example, between the filter medium parts and heated.
  • the material changes due to the supply of heat.
  • the surface melts, at least partially, and the end face of the filter medium part can sink into the melt. After cooling, the inner end face of the filter medium part is then sealed and inseparably enclosed by the means for stabilizing the folds.
  • the material can swell and harden due to the supply of heat, as a result of which the inner end face of the filter medium part is enclosed.
  • the material of the agent for stabilizing the wrinkles is processed into a thin film, for example 2 mm. Of course, the film can also be made thinner or thicker. The required sections are taken from this slide.
  • Rectangular strips are used for a flat element and circular or annular sections are used for a round filter element. This section is arranged on the inner end face of the filter medium part. The supply of heat causes the film to swell, as a result of which the material for stabilizing the folds encloses the filter medium part in the region of the inner end face.
  • the filter medium encloses a volume, in particular a cylindrical volume, in which the filter medium is closed in a ring.
  • This volume can e.g. also be a truncated cone or an elliptical cylinder.
  • the filter medium has a filter limitation on the two outer end faces and a single means for stabilizing the folds on the inner end faces between two filter medium parts, the means for stabilizing the folds essentially corresponding to a filter limitation.
  • the material for a second means of stabilizing the folds can thus be saved and the two filter medium parts are firmly connected to one another.
  • a filter for cleaning a fluid stream has a housing with an inlet and an outlet, a filter element of the described configuration being integrated in the housing.
  • FIG. 1 shows a filter element in a perspective view
  • FIG. 2 shows a filter element in a variant in a perspective view
  • FIG. 3 shows a filter element in a variant in a perspective view
  • Figure 4 is a flat filter element in perspective view
  • Figure 5 is a filter in section.
  • a filter element 10 is shown in perspective view with a cutout in the upper region of the filter element.
  • the filter element 10 has a filter medium 12 consisting of two filter medium parts 11.
  • the filter medium parts 11 have zigzag folds 13, the filter medium parts 11 being annular
  • Each filter medium part 11 has an outer end face 15 on the one hand and an inner end face 16 on the other hand.
  • a filter limitation 17 is arranged on the outer end face 15. This filter limitation 17 is made of plastic and is sealing with the respective filter medium part
  • a filter element 10 is shown in a variant in a perspective view. Components corresponding to FIG. 1 are provided with the same reference symbols.
  • the filter element 10 is formed by three filter medium parts 11.
  • the two filter medium parts 11 arranged on the outside have an outer end face 15 and an inner end face 16. Between these two filter medium parts 11 arranged on the outside, a middle filter medium part 11 is arranged, which has two inner end faces 16.
  • a single disc 14 is arranged between the inner end face 16 of the one outer filter medium part 11 and the inner end face 16 of the middle filter medium part 11, which connects the two filter medium parts 11 to one another and thus fixes and stabilizes the folds 13 in a stationary manner.
  • the other outer filter medium part 11 is connected to the middle filter medium part 11 in the same way.
  • each filter medium part 11 has on its inner end face
  • each filter medium part 11 with its filter limitation 17 and disc 14 is an independent module. Depending on the size of the filter element 10, two or more of these modules can be put together and form the filter element 10.
  • the two disks 14 are
  • FIG. 4 shows a flat filter element 18 in a perspective view.
  • the disk 14 between the filter medium parts 11 is of rectangular design, as a result of which the inner end faces 16 of the two adjacent filter medium parts 11 are sealed.
  • a single disk 14 can also be connected to a plurality of filter medium parts 11.
  • a filter for a liquid is shown in section in FIG. 5, the left and right half of the image showing different configurations. 30 components corresponding to FIG. 1 are provided with the same reference symbols.
  • the filter has a housing 19, which consists of a housing cover 20 and a housing pot 21.
  • the housing cover 20 is sealingly connected to the housing pot 21, the connection of the two housing parts 20, 21 to one another being a detachable connection.
  • the housing cover 20 has an inlet 22 and an outlet 23.
  • the inlet 22 is sealingly separated from the outlet 23 by the filter element 10.
  • the filter element 10 which has a circular cylindrical structure, is flowed through from the outside inwards.
  • the filter limitation 17 arranged in the upper region of the filter element 10 is designed in the form of a ring and lies sealingly against a connection piece 24. Sealing means (not shown) can also be provided for improved sealing.
  • the filter limiter 17 arranged in the bottom region of the housing base 21 is closed. As a result, no unfiltered liquid can reach the outlet 23.
  • a support body 25 is arranged in the interior of the filter element 10, on which the filter medium 12 can be supported, as a result of which the filter element 10 does not collapse even with larger differential pressures.
  • the filter limitation 17 arranged in the bottom region of the housing pot 21 is designed in a circular shape.
  • a plug 26 is provided so that no unfiltered liquid can reach the outlet 23.
  • This sealing plug 26 is supported on the one hand on the housing pot 21 and on the other hand it projects sealingly into the filter limitation 17.
  • a bypass valve (not shown) may also be arranged.

Abstract

The invention relates to a filter element (10) for purifying a fluid stream, especially fluids, whereby the filter element (10) does not collapse even when subjected to high pressures. To this end, the filter element (10) has a filter medium (12) comprised of two filter medium parts (11). The filter medium parts (11) are folded in a zigzagging manner and are joined in an annular manner. Each filter medium part (11) has an outer face (15) and an inner face (16). A filter delimiting part (17) is arranged on the outer face (15), and a disk (14) is arranged on the inner face (16). On the inner face (16), said disk (14) is joined to the filter medium part (11) in a tight manner whereby securely fixing the folds (13) in place.

Description

Filterelement filter element
Beschreibungdescription
Stand der TechnikState of the art
Die Erfindung betrifft ein Filterelement nach dem Oberbegriff des Anspruches 1.The invention relates to a filter element according to the preamble of claim 1.
Es ist aus der DE 44 29 490 ein radial durchströmtes ringförmiges Filterelement bekannt, welches über ein sternförmig gefaltetes Filtermedium verfügt. Das Filtermedium stützt sich auf seinem inneren Umfang an einem rohrförmigen, mit Durchbrechnungen versehenen Stützkörper ab. Damit sich die Falten nicht bewegen und das Filterelement bei hohen Differenzdrücken nicht kollabiert, ist ein Ringband auf dem äußeren Umfang des Filterelementes vorgesehen. Dieses Ringband presst die Falten an den Stützkörper, wodurch sich die Falten nicht mehr bewegen können. Das Ringband kann aus einem Material, welches unter Wärmeeinwirkung schrumpft und die Falten so stabilisiert, bestehen.From DE 44 29 490 a radially flowed through annular filter element is known, which has a filter medium folded in a star shape. The filter medium is supported on its inner circumference on a tubular support body provided with openings. So that the folds do not move and the filter element does not collapse at high differential pressures, an annular band is provided on the outer circumference of the filter element. This ring band presses the folds against the support body, which prevents the folds from moving. The ring band can consist of a material that shrinks under the influence of heat and thus stabilizes the folds.
Nachteilig bei dieser Ausführung ist jedoch, dass das Ringband durch Beschädigungen an einer einzigen Stelle abfallen kann, wodurch die Stützfunktion nicht mehr gegeben ist. Weiterhin kann das Ringband beim Schrumpfen das Filtermedium einschnüren, wodurch das Filtermedium einknickt und die Stabilität des Filterelementes verringert wird.A disadvantage of this embodiment, however, is that the ring band can fall off at one point as a result of damage, as a result of which the support function is no longer provided. Furthermore, the ring band can constrict the filter medium when shrinking, as a result of which the filter medium kinks and the stability of the filter element is reduced.
Aufgabe der Erfindung ist es daher, ein Filterelement zu schaffen, welches auch bei hohen Differenzdrücken nicht kollabiert und das Filtermedium zuverlässig abstützt. Diese Aufgabe wird durch die Merkmale des Patentanspruches 1 gelöst.The object of the invention is therefore to create a filter element which does not collapse even at high differential pressures and reliably supports the filter medium. This object is solved by the features of claim 1.
Vorteile der ErfindungAdvantages of the invention
Das erfindungsgemäße Filterelement dient der Reinigung eines Fluids, insbesondere einer Flüssigkeit. Hierzu verfügt das Filterelement über ein gefaltetes Filtermedium mit zwei äußeren Stirnflächen, an welchen eine Filterbegrenzung angeordnet ist. Bei beson- deren Ausführungen ist das Filtermedium zick-zack-förmig gefaltet. Die äußeren Stirnflächen verlaufen im wesentlichen senkrecht zu den Falten, wodurch der Faltenverlauf an den äußeren Stirnflächen erkennbar ist. Hierbei können bei besonderen Ausführungsformen die Filterelemente jedoch auch trapezförmig ausgebildet sein, wobei an den schräg zu den Falten verlaufenden äußeren Stirnflächen der Faltenverlauf erkennbar ist. Die Filterbegrenzung ist an den äußeren Stirnflächen dichtend mit dem Filtermedium verbunden, wobei die Filterbegrenzung z.B. aus einem thermoplastischen Kunststoff wie z.B. Polyethylen, einem Elastomer wie z.B. Polyurethan oder Metall bestehen kann. Diese Filterbegrenzung kann einteilig oder mehrteilig ausgeführt und z.B. durch ihren eigenen Werkstoff oder durch einen Klebstoff mit dem Filtermedium verbunden sein.The filter element according to the invention is used to clean a fluid, in particular a liquid. For this purpose, the filter element has a folded filter medium with two outer end faces, on which a filter limitation is arranged. In special designs, the filter medium is folded in a zigzag shape. The outer end faces run essentially perpendicular to the folds, as a result of which the course of the folds can be recognized on the outer end faces. In special embodiments, however, the filter elements can also have a trapezoidal shape, with the diagonal the course of the folds can be seen in relation to the outer end faces of the folds. The filter limitation is sealingly connected to the filter medium on the outer end faces, wherein the filter limitation can consist, for example, of a thermoplastic plastic such as polyethylene, an elastomer such as polyurethane or metal. This filter limitation can be made in one part or in several parts and connected to the filter medium, for example, by its own material or by an adhesive.
Das Filtermedium ist durch mindestens zwei aneinander anschließende Filtermediumteile gebildet, wodurch das Filtermedium über mindestens zwei innere Stirnseiten verfügt. Die Filtermediumteile bestehen vorteilhafter Weise aus dem gleichen Filtermaterial. Zumin- dest weisen beide Filtermediumteile die gleiche Filterfeinheit auf und filtern die gleichen Verunreinigungen aus dem Fluid heraus. An den inneren Stirnseiten ist der Faltenverlauf erkennbar. Damit das Filterelement auch bei hohen spezifischen Volumenströmen bzw. Differenzdrücken nicht kollabiert, ist ein Mittel zur Stabilisierung der Falten vorgesehen. Dieses Mittel zur Stabilisierung der Falten ist an den inneren Stirnseiten, welche in einem Mittenbereich zwischen den beiden äußeren Stirnflächen des Filtermediums angeordnet sind, dichtend mit den Filtermediumteilen verbunden. Dadurch bleibt eine Stabilisierung der Falten auch dann bestehen, wenn das Mittel zur Stabilisierung der Falten an einer einzelnen Stelle beschädigt ist. Je nachdem, welche Eigenstabilität das Filtermedium aufweist und welche Differenzdrücke auf das Filterelement einwirken können, ist die Grö- ße der einzelnen Filtermediumteile zu wählen. Je geringer der Abstand zwischen der Filterbegrenzung und dem Mittel zur Stabilisierung der Falten gewählt wird, desto höhere Differenzdrücke kann das Filterelement ohne Kollabieren aushalten. Zur Erzielung der erforderlichen Filterfläche ist eine entsprechende Anzahl an Filtermediumteilen vorzusehen. Das Mittel zur Stabilisierung der Falten weist vorteilhafterweise eine höhere Stabilität als das Filtermedium auf, wodurch die Falten optimal fixiert werden können.The filter medium is formed by at least two adjoining filter medium parts, as a result of which the filter medium has at least two inner end faces. The filter medium parts advantageously consist of the same filter material. At least both filter medium parts have the same filter fineness and filter the same impurities out of the fluid. The course of the folds can be seen on the inner end faces. So that the filter element does not collapse even at high specific volume flows or differential pressures, a means for stabilizing the folds is provided. This means for stabilizing the folds is sealingly connected to the filter medium parts on the inner end faces, which are arranged in a central region between the two outer end faces of the filter medium. As a result, the folds remain stabilized even if the means for stabilizing the folds is damaged at a single point. Depending on the intrinsic stability of the filter medium and the differential pressures that can act on the filter element, the size of the individual filter medium parts must be selected. The smaller the distance between the filter limitation and the means for stabilizing the folds, the higher differential pressures the filter element can withstand without collapsing. A corresponding number of filter medium parts must be provided to achieve the required filter area. The means for stabilizing the folds advantageously has a higher stability than the filter medium, as a result of which the folds can be optimally fixed.
Bei besonders vorteilhaften Ausführungen ist das Mittel zur Stabilisierung scheibenförmig ausgebildet, wodurch möglichst wenig Filterfläche des Filtermediums umschlossen und der Bauraum für das Filterelement nicht unnötig vergrößert wird. Das scheibenförmig ausgebildete Mittel zur Stabilisierung der Falten ist derart gestaltet, dass es im wesentli- chen einer von der inneren Stirnfläche projizierten Fläche, bzw. deren Umriss entspricht.In particularly advantageous embodiments, the stabilizing means is disc-shaped, as a result of which as little filter area as possible is enclosed by the filter medium and the installation space for the filter element is not unnecessarily increased. The disk-shaped means for stabilizing the folds is designed in such a way that it essentially corresponds to a surface projected from the inner end face or its outline.
Gemäß einer vorteilhaften Ausgestaltung der Erfindung ist das Mittel zur Stabilisierung der Falten an den inneren Stirnseiten mit den Filtermediumteilen verklebt. Der Klebstoff bewirkt einerseits die Verbindung zwischen dem Mittel zur Stabilisierung der Falten und den Filtermediumteilen und andererseits die Abdichtung, damit die Rohseite dichtend von der Reinseite getrennt ist. Durch Verkleben der Filtermediumteile mit dem Mittel zur Stabilisierung der Falten kann das Mittel zur Stabilisierung der Falten z.B. aus Metall bestehen und auf einfache und kostengünstige Weise mit den Filtermediumteilen verbunden werden.According to an advantageous embodiment of the invention, the means for stabilizing the folds on the inner end faces is glued to the filter medium parts. The adhesive on the one hand effects the connection between the means for stabilizing the folds and the filter medium parts and on the other hand the sealing, so that the raw side seals off the clean side is separated. By gluing the filter medium parts to the means for stabilizing the folds, the means for stabilizing the folds can consist, for example, of metal and can be connected to the filter medium parts in a simple and inexpensive manner.
Eine zweckmäßige Ausgestaltung der Erfindung sieht vor, dass das Mittel zur Stabilisierung der Falten zumindest eine innere Stirnseite unlösbar umschließt. Hierbei kann das Mittel zur Stabilisierung der Falten das Filtermediumteil form- oder kraftschlüssig umschließen. Durch das Umschließen der inneren Stirnseite können zusätzliche Dichtungskomponenten entfallen. Bei einer besonderen Ausgestaltung kann das Filtermediumteil im Bereich der inneren Stirnseite über Durchbrüche verfügen, durch welche der Werkstoff des Mittels zur Stabilisierung der Falten hindurch treten kann und nach dem Erhärten eine unlösbare Verbindung erzeugt.An expedient embodiment of the invention provides that the means for stabilizing the folds inextricably encloses at least one inner end face. The means for stabilizing the folds can enclose the filter medium part in a positive or non-positive manner. By enclosing the inner end face, additional sealing components can be omitted. In a special embodiment, the filter medium part can have openings in the area of the inner end face, through which the material of the agent for stabilizing the folds can pass and produce an inseparable connection after hardening.
Es ist vorteilhaft, dass ein einziges Mittel zur Stabilisierung der Falten mit den beiden angrenzenden Filtermediumteilen an den inneren Stirnseiten verbunden ist. Dadurch sind die beiden Filtermediumteile zueinander fixiert, wodurch keine Leckage durch eine Verschiebung der beiden Filtermediumteile zueinander entstehen kann. Weiterhin ist so eine größtmögliche Filterfläche in einem vorgegebenen Bauraum realisierbar.It is advantageous that a single means for stabilizing the folds is connected to the two adjacent filter medium parts on the inner end faces. As a result, the two filter medium parts are fixed to one another, so that no leakage can occur due to a displacement of the two filter medium parts relative to one another. Furthermore, the largest possible filter area can be realized in a given installation space.
Eine weitere Ausführungsform der Erfindung sieht vor, dass jedes Filtermediumteil an den inneren Stirnseiten über ein eigenes Mittel zur Stabilisierung der Falten verfügt, wo- bei die beiden Mittel zur Stabilisierung der Falten miteinander dichtend und unlösbar verbunden sind. Durch diese Ausführungsform kann ein Filterelement modular aufgebaut werden, wodurch entsprechend der erforderlichen Baugröße des Filterelementes enstprechende standartisierte Filtermediumteile zu der erforderlichen Baugröße zusammengesetzt werden können.A further embodiment of the invention provides that each filter medium part has its own means for stabilizing the folds on the inner end faces, the two means for stabilizing the folds being connected to one another in a sealing and non-detachable manner. By means of this embodiment, a filter element can be constructed in a modular manner, whereby corresponding standardized filter medium parts corresponding to the required size of the filter element can be assembled to the required size.
Die Verbindung der beiden Mittel zur Stabilisierung miteinander kann sowohl mechanisch durch z.B. Nieten oder Schnappverbindungen, als auch chemisch durch z.B. Klebstoff erfolgen. Bei der mechanischen Verbindung können Dichtelemente wie z.B. Dichtringe, zwischen die beiden Mittel zur Stabilisierung der Falten eingebracht werden. Bei der chemischen Verbindung ist auch eine weitere Variante durch z.B. anlösen einer Kontakt- seite mit einem Lösungsmittel denkbar. Hierzu werden die Mittel zur Stabilisierung der Falten nach dem Anlösen an der Kontaktseite aneindander gedrückt. Gemäß einer vorteilhaften Ausgestaltung der Erfindung besteht das Mittel zur Stabilisierung der Falten aus einem thermisch erweichbaren Material, insbesondere Nitrilkaut- schuk. Hierbei kann das Filterelement einfach, schnell und kostengünstig hergestellt werden. Das thermisch erweichbare Material wird z.B. zwischen die Filtermediumteile einge- bracht und erwärmt. Durch die Wärmezufuhr verändert sich das Material. Bei einem thermoplastischen Kunststoff schmilzt, zumindest teilweise, die Oberfläche auf und die Stirnseite des Filtermediumteils kann in die Schmelze einsinken. Nach dem Erkalten ist dann die innere Stirnseite des Filtermediumteils dichtend und unlösbar von dem Mittel zur Stabilisierung der Falten umschlossen. Bei anderen Werkstoffen wie z.B. Nitrilkautschuk kann das Material durch die Wärmezufuhr aufquellen und aushärten, wodurch die innere Stirnseite des Filtermediumteils umschlossen wird. Hierzu wird das Material des Mittels zur Stabilisierung der Falten zu einer dünnen Folie von z.B. 2mm verarbeitet. Selbstverständlich kann die Folie auch dünner oder dicker ausgeführt sein. Aus dieser Folie werden die erforderlichen Abschnitte entnommen. Für ein Flachelement werden rechteck- förmige Streifen und für ein Rundfilterelement kreis- bzw. kreisringförmige Abschnitte verwendet. Dieser Abschnitt wird an die innere Stirnseite des Filtermediumteils angeordnet. Durch die Zufuhr von Wärme quillt die Folie auf, wodurch das Material des Mittels zur Stabilisierung der Falten das Filtermediumteil im Bereich der inneren Stirnseite umschließt.The connection of the two means for stabilization to one another can take place mechanically, for example by rivets or snap connections, or chemically, for example by adhesive. In the mechanical connection, sealing elements such as sealing rings can be inserted between the two means for stabilizing the folds. Another variant of the chemical bond is also conceivable, for example by dissolving a contact side with a solvent. For this purpose, the means for stabilizing the wrinkles are pressed together on the contact side after they have been loosened. According to an advantageous embodiment of the invention, the means for stabilizing the folds consists of a thermally softenable material, in particular nitrile rubber. Here, the filter element can be manufactured simply, quickly and inexpensively. The thermally softenable material is placed, for example, between the filter medium parts and heated. The material changes due to the supply of heat. In the case of a thermoplastic plastic, the surface melts, at least partially, and the end face of the filter medium part can sink into the melt. After cooling, the inner end face of the filter medium part is then sealed and inseparably enclosed by the means for stabilizing the folds. In the case of other materials, such as nitrile rubber, the material can swell and harden due to the supply of heat, as a result of which the inner end face of the filter medium part is enclosed. For this purpose, the material of the agent for stabilizing the wrinkles is processed into a thin film, for example 2 mm. Of course, the film can also be made thinner or thicker. The required sections are taken from this slide. Rectangular strips are used for a flat element and circular or annular sections are used for a round filter element. This section is arranged on the inner end face of the filter medium part. The supply of heat causes the film to swell, as a result of which the material for stabilizing the folds encloses the filter medium part in the region of the inner end face.
Bei einer besonderen Ausführungsform der Erfindung umschließt das Filtermedium ein Volumen, insbesondere ein zylindrisches Volumen, bei dem das Filtermedium ringförmig zusammengeschlossen ist. Dieses Volumen kann z.B. auch ein Kegelstumpf oder ein elliptischer Zylinder sein.In a particular embodiment of the invention, the filter medium encloses a volume, in particular a cylindrical volume, in which the filter medium is closed in a ring. This volume can e.g. also be a truncated cone or an elliptical cylinder.
Gemäß einer Weiterbildung der Erfindung verfügt das Filtermedium an den beiden äuße- ren Stirnflächen über jeweils eine Filterbegrenzung und an den inneren Stirnseiten zwischen je zwei Filtermediumteilen über ein einziges Mittel zur Stabilisierung der Falten, wobei das Mittel zur Stabilisierung der Falten im wesentlichen einer Filterbegrenzung entspricht. Somit kann das Material für ein zweites Mittel zur Stabilisierung der Falten eingespart werden und die beiden Filtermediumteile sind fest miteinander verbunden.According to a further development of the invention, the filter medium has a filter limitation on the two outer end faces and a single means for stabilizing the folds on the inner end faces between two filter medium parts, the means for stabilizing the folds essentially corresponding to a filter limitation. The material for a second means of stabilizing the folds can thus be saved and the two filter medium parts are firmly connected to one another.
Gemäß einer vorteilhaften Ausbildung der Erfindung weist ein Filter zur Reinigung eines Fluidstromes ein Gehäuse mit einem Einlass und einem Auslass auf, wobei ein Filterelement der beschriebenen Ausgestaltung in das Gehäuse integriert ist. Diese und weitere Merkmale von bevorzugten Weiterbildungen der Erfindung gehen außer aus den Ansprüchen auch aus der Beschreibung und der Zeichnung hervor, wobei die einzelnen Merkmale jeweils für sich allein oder zu mehreren in Form von Unterkombinationen bei der Ausführungsform der Erfindung und auf anderen Gebieten verwirklicht 5 sein und vorteilhafte sowie für sich schutzfähige Ausführungen darstellen können, für die hier Schutz beansprucht wird.According to an advantageous embodiment of the invention, a filter for cleaning a fluid stream has a housing with an inlet and an outlet, a filter element of the described configuration being integrated in the housing. These and further features of preferred developments of the invention are evident from the claims and also from the description and the drawing, the individual features being realized individually or in groups in the form of sub-combinations in the embodiment of the invention and in other areas 5 and can represent advantageous and protectable versions for which protection is claimed here.
Zeichnungdrawing
Weitere Einzelheiten der Erfindung werden in der Zeichnung anhand von schematischen Ausführungsbeispielen beschrieben. Hierbei zeigtFurther details of the invention are described in the drawing using schematic exemplary embodiments. Here shows
10 Figur 1 ein Filterelement in perspektivischer Ansicht,FIG. 1 shows a filter element in a perspective view,
Figur 2 ein Filterelement in einer Variante in perspektivischer Ansicht,FIG. 2 shows a filter element in a variant in a perspective view,
Figur 3 ein Filterelement in einer Variante in perspektivischer Ansicht,FIG. 3 shows a filter element in a variant in a perspective view,
Figur 4 ein Flachfilterelement in perspektivischer Ansicht undFigure 4 is a flat filter element in perspective view
Figur 5 ein Filter im Schnitt.Figure 5 is a filter in section.
15 Beschreibung der Ausführungsbeispiele15 Description of the exemplary embodiments
In Figur 1 ist ein Filterelement 10 in perspektivischer Ansicht mit einem Ausbruch im oberen Bereich des Filterelementes dargestellt. Das Filterelement 10 weist ein, aus zwei Filtermediumteilen 11 bestehendes Filtermedium 12 auf. Die Filtermediumteile 11 weisen zick-zack-förmig ausgebildete Falten 13 auf, wobei die Filtermediumteile 11 ringförmigIn Figure 1, a filter element 10 is shown in perspective view with a cutout in the upper region of the filter element. The filter element 10 has a filter medium 12 consisting of two filter medium parts 11. The filter medium parts 11 have zigzag folds 13, the filter medium parts 11 being annular
20 zusammengeschlossen sind. Die Filtermediumteile 1 1 sind durch eine Scheibe 14, welche zur Stabilisierung der Falten 13 dient, verbunden. Jedes Filtermediumteil 11 verfügt einerseits über eine äußere Stirnfläche 15 und andererseits über eine innere Stirnseite 16. An der äußeren Stirnfläche 15 ist eine Filterbegrenzung 17 angeordnet. Diese Filterbegrenzung 17 beteht aus Kunststoff und ist dichtend mit dem jeweiligen Filtermediumteil20 are united. The filter medium parts 1 1 are connected by a disc 14, which serves to stabilize the folds 13. Each filter medium part 11 has an outer end face 15 on the one hand and an inner end face 16 on the other hand. A filter limitation 17 is arranged on the outer end face 15. This filter limitation 17 is made of plastic and is sealing with the respective filter medium part
25 11 verbunden. An den inneren Stirnseiten 16, welche zwischen den äußeren Stirnflächen 15 angeordnet sind, ist die Scheibe 14 dichtend mit den beiden angrenzenden Filtermediumteilen 11 verbunden. Die Scheibe 14 ist kreisringförmig ausgeführt (nicht dargestellt), damit das, durch das untere Filtermediumteil 11 gereinigte Fiuid abströmen kann. In Figur 2 ist ein Filterelement 10 in einer Variante in perspektivischer Ansicht dargestellt. Der Figur 1 entsprechende Bauteile sind mit gleichen Bezugszeichen versehen. Bei diesem Ausführungsbeispiel wird das Filterelement 10 durch drei Filtermediumteile 11 gebildet. Die beiden außen angeordneten Filtermediumteile 11 verfügen über eine äußere 5 Stirnfläche 15 und eine innere Stirnseite 16. Zwischen diesen beiden außen angeordneten Filtermediumteilen 11 ist ein mittleres Filtermediumteil 11 angeordnet, welches über zwei innere Stirnseiten 16 verfügt. Zwischen der inneren Stirnseite 16 des einen äußeren Filtermediuteils 11 und der inneren Stirnseite 16 des mittleren Filtermediumteils 11 ist eine einzige Scheibe 14 angeordnet, welche die beiden Filtermediumteile 11 miteinander 10 verbindet und so die Falten 13 ortsfest fixiert und stabilisiert. Das andere äußere Filtermediumteil 11 ist auf die gleiche Weise mit dem mittleren Filtermediumteil 11 verbunden.25 11 connected. On the inner end faces 16, which are arranged between the outer end faces 15, the disk 14 is sealingly connected to the two adjacent filter medium parts 11. The disk 14 is designed in the form of a ring (not shown) so that the fluid cleaned through the lower filter medium part 11 can flow off. In Figure 2, a filter element 10 is shown in a variant in a perspective view. Components corresponding to FIG. 1 are provided with the same reference symbols. In this embodiment, the filter element 10 is formed by three filter medium parts 11. The two filter medium parts 11 arranged on the outside have an outer end face 15 and an inner end face 16. Between these two filter medium parts 11 arranged on the outside, a middle filter medium part 11 is arranged, which has two inner end faces 16. A single disc 14 is arranged between the inner end face 16 of the one outer filter medium part 11 and the inner end face 16 of the middle filter medium part 11, which connects the two filter medium parts 11 to one another and thus fixes and stabilizes the folds 13 in a stationary manner. The other outer filter medium part 11 is connected to the middle filter medium part 11 in the same way.
In Figur 3 ist ein Filterelement 10 in einer Variante in perspektivischer Ansicht dargestellt. Der Figur 1 entsprechende Bauteile sind mit gleichen Bezugszeichen versehen. Bei diesem Ausführungsbeispiel verfügt jedes Filtermediumteil 11 an seiner inneren StirnseiteIn Figure 3, a filter element 10 is shown in a variant in a perspective view. Components corresponding to FIG. 1 are provided with the same reference symbols. In this exemplary embodiment, each filter medium part 11 has on its inner end face
15 16 über eine eigene Scheibe 14. Die Scheibe 14 entspricht sowohl in den Maßen, als auch im Werkstoff einer Filterbegrenzung 17. Somit ist jedes Filtermediumteil 11 mit seiner Filterbegrenzung 17 und Scheibe 14 ein eigenständiges Modul. Je nachdem, welche Größe das Filterelement 10 aufweisen soll, können zwei oder mehrere dieser Module zusammengesetzt werden und das Filterelement 10 bilden. Die beiden Scheiben 14 wer-15 16 via its own disc 14. The disc 14 corresponds in terms of both dimensions and material to a filter limitation 17. Thus, each filter medium part 11 with its filter limitation 17 and disc 14 is an independent module. Depending on the size of the filter element 10, two or more of these modules can be put together and form the filter element 10. The two disks 14 are
20 den an der, dem Filtermediumteil 11 gegenüberliegenden Seite dichtend miteinander verklebt.20 sealingly glued together on the side opposite the filter medium part 11.
In Figur 4 ist ein Flachfilterelement 18 in perspektivischer Ansicht dargestellt. Der Figur 1 entsprechende Bauteile sind mit gleichen Bezugszeichen versehen. Bei diesem Ausführungsbeispiel ist die Scheibe 14 zwischen den Filtermediumteilen 11 rechteckförmig aus- 25 geführt, wodurch die inneren Stirnseiten 16 der beiden angrenzenden Filtermediumteile 1 1 dichtend umschlossen werden. Bei anderen Ausführungsbeispielen kann eine einzige Scheibe 14 auch mit mehreren Filtermediumteilen 11 verbunden sein.FIG. 4 shows a flat filter element 18 in a perspective view. Components corresponding to FIG. 1 are provided with the same reference symbols. In this exemplary embodiment, the disk 14 between the filter medium parts 11 is of rectangular design, as a result of which the inner end faces 16 of the two adjacent filter medium parts 11 are sealed. In other exemplary embodiments, a single disk 14 can also be connected to a plurality of filter medium parts 11.
In Figur 5 ist ein Filter für eine Flüssigkeit im Schnitt dargestellt, wobei die linke und die rechte Bildhälfte unterschiedliche Ausgestaltungen zeigen. Der Figur 1 entsprechende 30 Bauteile sind mit gleichen Bezugszeichen versehen. Der Filter weist ein Gehäuse 19 auf, welches aus einem Gehäusedeckel 20 und einem Gehäusetopf 21 besteht. Der Gehäusedeckel 20 ist dichtend mit dem Gehäusetopf 21 verbunden, wobei die Verbindung der beiden Gehäuseteile 20, 21 miteinander eine lösbare Verbindung ist. Der Gehäusedeckel 20 verfügt über einen Zulauf 22 und einen Ablauf 23. Der Zulauf 22 ist durch das Filterelement 10 dichtend von dem Ablauf 23 getrennt. Bei diesem Ausführungsbeispiel ist das kreiszylindrisch aufgebaute Filterelement 10 von außen nach innen durchströmt. Die im oberen Bereich des Filterelementes 10 angeordnete Filterbegrenzung 17 ist kreisringför- mig ausgeführt und liegt dichtend an einem Stutzen 24 an. Hierbei können auch Dichtmittel (nicht dargestellt) zur verbesserten Abdichtung vorgesehen sein.A filter for a liquid is shown in section in FIG. 5, the left and right half of the image showing different configurations. 30 components corresponding to FIG. 1 are provided with the same reference symbols. The filter has a housing 19, which consists of a housing cover 20 and a housing pot 21. The housing cover 20 is sealingly connected to the housing pot 21, the connection of the two housing parts 20, 21 to one another being a detachable connection. The housing cover 20 has an inlet 22 and an outlet 23. The inlet 22 is sealingly separated from the outlet 23 by the filter element 10. In this exemplary embodiment, the filter element 10, which has a circular cylindrical structure, is flowed through from the outside inwards. The filter limitation 17 arranged in the upper region of the filter element 10 is designed in the form of a ring and lies sealingly against a connection piece 24. Sealing means (not shown) can also be provided for improved sealing.
Auf der linken Bildhälfte ist die im Bodenbereich des Gehäusebodens 21 angeordnete Filterbegrenzung 17 geschlossen ausgeführt. Dadurch kann keine ungefilterte Flüssigkeit zu dem Ablauf 23 gelangen. Im Inneren des Filterelementes 10 ist ein Stützkörper 25 angeordnet, an welchem sich das Filtermedium 12 abstützen kann, wodurch auch bei größeren Differenzdrücken das Filterelement 10 nicht kollabiert.On the left half of the picture, the filter limiter 17 arranged in the bottom region of the housing base 21 is closed. As a result, no unfiltered liquid can reach the outlet 23. A support body 25 is arranged in the interior of the filter element 10, on which the filter medium 12 can be supported, as a result of which the filter element 10 does not collapse even with larger differential pressures.
Auf der rechten Bildhälfte ist die im Bodenbereich des Gehäusetopfes 21 angeordnete Filterbegrenzung 17 kreisringförmig ausgeführt. Damit keine ungefilterte Flüssigkeit zu dem Ablauf 23 gelangen kann, ist ein Verschlußstopfen 26 vorgesehen. Dieser Verschlußstopfen 26 stützt sich einerseits an dem Gehäusetopf 21 ab und andererseits ragt er dichtend in die Filterbegrenzung 17 hinein. Anstelle des Verschlußstopfens 26 könnte z.B. auch ein Umgehungsventil (nicht dargestellt) angeordnet sein. On the right half of the picture, the filter limitation 17 arranged in the bottom region of the housing pot 21 is designed in a circular shape. A plug 26 is provided so that no unfiltered liquid can reach the outlet 23. This sealing plug 26 is supported on the one hand on the housing pot 21 and on the other hand it projects sealingly into the filter limitation 17. Instead of the sealing plug 26, e.g. a bypass valve (not shown) may also be arranged.

Claims

Patentansprüche claims
1. Filterelement, insbesondere für Flüssigkeiten, aufweisend ein Filtermedium 12, welches über Falten 13 verfügt, eine Filterbegrenzung 17 und ein Mittel zur Stabilisierung der Falten 13,1. filter element, in particular for liquids, comprising a filter medium 12 which has folds 13, a filter limitation 17 and a means for stabilizing the folds 13,
- wobei das Filtermedium 12 über zwei äußere Stirnflächen 15 verfügt, welche senkrecht zu den Falten 13 angeordnet sind,the filter medium 12 has two outer end faces 15 which are arranged perpendicular to the folds 13,
- wobei das Mittel zur Stabilisierung der Falten in einem Mittenbereich zwischen den beiden äußeren Stirnflächen 15 des Filtermediums 12 angeordnet ist,the means for stabilizing the folds is arranged in a central region between the two outer end faces 15 of the filter medium 12,
- wobei die Filterbegrenzung 17 mit dem Filtermedium 12 an den äußeren Stirnflächen 15 verbunden ist, dadurch gekennzeichnet, dass- The filter limitation 17 is connected to the filter medium 12 on the outer end faces 15, characterized in that
- das Filtermedium 12 durch mindestens zwei gefaltete Filtermediumteile 11 gebildet ist und das Mittel zur Stabilisierung der Falten 13 an inneren Stirnseiten 16 zwischen den Filtermediumteilen 11 angeordnet ist und- The filter medium 12 is formed by at least two folded filter medium parts 11 and the means for stabilizing the folds 13 is arranged on the inner end faces 16 between the filter medium parts 11 and
- das Mittel zur Stabilisierung der Falten 13 an den inneren Stirnseiten 16 dichtend mit den Filtermediumteilen 11 verbunden ist.- The means for stabilizing the folds 13 on the inner end faces 16 is sealingly connected to the filter medium parts 11.
2. Filterelement nach Anspruch 1 , dadurch gekennzeichnet, dass das Mittel zur Stabilisierung der Falten 13 mit den Filtermediumteilen 11 an den inneren Stirnseiten 16 verklebt ist.2. Filter element according to claim 1, characterized in that the means for stabilizing the folds 13 is glued to the filter medium parts 11 on the inner end faces 16.
3. Filterelement nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das Mittel zur Stabilisierung der Falten 13 zumindest eine innere Stirnseite 16 umschließt.3. Filter element according to one of the preceding claims, characterized in that the means for stabilizing the folds 13 encloses at least one inner end face 16.
4. Filterelement nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass ein einziges Mittel zur Stabilisierung der Falten 13 mit den beiden angrenzenden Filtermediumteilen 11 an den inneren Stirnseiten 16 verbunden ist.4. Filter element according to one of the preceding claims, characterized in that a single means for stabilizing the folds 13 is connected to the two adjacent filter medium parts 11 on the inner end faces 16.
5. Filterelement nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass jedes Filtermediumteil 11 an den inneren Stirnseiten 16 über ein eigenes Mittel zur Stabilisierung der Falten 13 verfügt, wobei die beiden Mitteln zur Stabilisierung der Falten 13 miteinander verbunden sind.5. Filter element according to one of claims 1 to 3, characterized in that each filter medium part 11 on the inner end faces 16 has its own means for stabilizing the folds 13, the two means for stabilizing the folds 13 being connected to one another.
6. Filterelement nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das Mittel zur Stabilisierung der Falten 13 aus einem thermisch erweichbaren Material, insbesondere Nitrilkautschuk, besteht. 6. Filter element according to one of the preceding claims, characterized in that the means for stabilizing the folds 13 consists of a thermally softenable material, in particular nitrile rubber.
7. Filterelement nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das Filtermedium 12 ein Volumen, insbesondere ein zylindrisches Volumen, umschließt.7. Filter element according to one of the preceding claims, characterized in that the filter medium 12 encloses a volume, in particular a cylindrical volume.
8. Filterelement nach Anspruch 9, dadurch gekennzeichnet, dass das Filtermedium 12 an den beiden äußeren Stirnflächen 15 über jeweils eine Filterbegrenzung 17 verfügt und dass an den inneren Stirnseiten 16 zwischen je zwei Filtermediumteilen 11 ein einziges Mittel zur Stabilisierung der Falten 13 angeordnet ist, wobei das Mittel zur Stabilisierung der Falten 13 im wesentlichen einer Filterbegrenzung 17 entspricht.8. Filter element according to claim 9, characterized in that the filter medium 12 has a filter limitation 17 on each of the two outer end faces 15 and that a single means for stabilizing the folds 13 is arranged on the inner end faces 16 between two filter medium parts 11, wherein the means for stabilizing the folds 13 corresponds essentially to a filter limitation 17.
9. Filter, aufweisend ein Gehäuse 19 mit einem Einlass 22 und einem Auslass 23, dadurch gekennzeichnet, dass ein Filterelement 10 nach einem der Ansprüche 1 bis 8 enthalten ist. 9. Filter, comprising a housing 19 with an inlet 22 and an outlet 23, characterized in that a filter element 10 according to one of claims 1 to 8 is included.
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Publication number Priority date Publication date Assignee Title
US7096124B2 (en) 2001-12-14 2006-08-22 Optiscan Biomedical Corporation Method of determining an analyte concentration in a sample from an absorption spectrum
WO2008004848A1 (en) * 2006-07-03 2008-01-10 Iman Abdelkabir Filter plug
WO2012084753A1 (en) 2010-12-23 2012-06-28 Mahle International Gmbh Air filter element

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