DE102016012532A1 - Filter element and filter system - Google Patents

Abstract

The invention relates to a filter element (10) for filtering a fluid, having at least two filter bellows sections (12, 13, 14, 15) which enclose a clean fluid region (50), wherein in at least one of the filter bellows sections (12, 13, 14, 15). a channel (16, 17, 18) extending through the filter bellows section (12, 13, 14, 15) is formed, which is surrounded at least in regions by the filter bellows section (12, 13, 14, 15) and in which an element (20 , 21, 22) is arranged fluid-tight to the filter bellows section (12, 13, 14, 15).

Description

Technical area

The invention relates to a filter element for filtering a fluid, in particular for use for cassette air filter of an internal combustion engine or as an interior air filter, in particular of a motor vehicle and a filter system with a filter element.

State of the art

In practice, particulate filters are used to filter out particulate impurities contained in gaseous fluids, for example air. The particulate filters include a filter housing having an inlet for the fluid to be filtered and an outlet for the filtered fluid.

From the EP 2 582 443 B1 an air filter assembly is known, comprising a housing, which has two substantially on both sides of a housing plane extending large side walls and a housing center plane substantially orthogonal, connecting the side walls peripheral wall and a Rohraumeingang and a clean room outlet. Furthermore, the filter arrangement has a filter insert which is effective between the tube chamber inlet and the clean room outlet and which has two filter plates adjacent to the sidewalls in the mounted state and a filter wall essentially perpendicular to the housing middle plane connecting the sidewalls and which is adjacent to the tube chamber inlet or the cleanroom outlet subsequent opening is interspersed.

The side walls of the housing and the bottom discs of the filter cartridge are each combined into a double wall, so that stiffen each one side wall of the housing and the adjacent bottom plate of the filter insert mutually. In case of bending deformation of the double wall, d. H. From housing side wall and bottom plate of the filter element, frictional shear movements occur between the respective side wall and bottom plate, so that a vibration damping takes place.

In the in the EP 2 582 443 B1 described filter assembly is carried out so the coupling of filter element and housing by means of the end plates of the filter element and the opposite housing parts by arranged or molded profile parts.

Disclosure of the invention

An object of the invention is to provide a filter element for filtering a fluid, which enables a stable reception in a filter housing of a filter system.

Another object is to provide a filter system for filtering a fluid to receive such a replaceable filter element.

The above objects are achieved according to one aspect of the invention by a filter element for filtering a fluid, with at least two Filterbalgabschnitten that include a clean fluid area, wherein in at least one of the Filterbalgabschnitte a extending through the Filterbalgabschnitt channel is formed, at least partially from the Filterbalgabschnitt is surrounded and in which an element is arranged fluid-tight to the filter bellows section.

According to another aspect of the invention, the object is achieved by a filter system for filtering a fluid with at least one such filter element.

Favorable embodiments and advantages of the invention will become apparent from the other claims, the description and the drawings.

It is proposed a filter element for filtering a fluid, with at least two filter bellows sections, which include a clean fluid area. In this case, a channel extending through the filter bellows section is formed in at least one of the filter bellows sections, which channel is surrounded at least in regions by the filter bellows section and in which an element is arranged in a fluid-tight manner to the filter bellows section.

The channel extends between the raw side and the clean side of the at least one Filterbalgabschnitts and may be arranged in particular transversely to the flat side of the at least one Filterbalgabschnitts.

The filter element comprising at least two filter bellows sections enclosing a clean fluid region of a filter bellows according to the invention comprises at least one element which is mounted in a surface of a Filterbalgabschnitts in a channel in the form of a through hole in the Filterbalgabschnitt. The channel can be cut out of the filter bellows section in a corresponding manner or cut out, for example, with a laser cutter. The element is arranged fluid-tight in the channel by the element itself seals against the surrounding filter bellows or the element with the aid of a sealing compound, such as polyurethane (PUR) foam, sealed against the filter bellows. The element is for securing or supporting the supporting filter element body in a filter housing of the Filter system provided in which the replaceable filter element is installed. The interaction of the element and the filter housing serves both to hold the filter element in the filter housing and to switch off noises, in particular resonant vibrations of the filter element. The filter element according to the invention thus enables with the element the connection / support of filter element and filter housing, for example by means of the filter bellows with PUR foam introduced element, which is supported on the filter housing and for a pressure load or for clamping the filter element in the filter housing between the housing base and Housing upper part can be provided. Alternatively, the element can also correspond to a corresponding mating element on the filter housing lower part and / or housing upper part, wherein it can be designed to be resilient to tensile and / or pressure. It is also conceivable with a metering hose supplied and positioned inserts that are embedded in PUR foam and can lock with a corresponding counter element of the filter housing. In this case, other types of coupling with the counter element are conceivable, such as fittings, snaps with snaps, bayonet-type connections and similar compounds.

To increase the possible load capacity of the filter bellows can be reinforced with the filter element body and / or a center tube foamed or verclipsten support grid or struts, which can be glued for the tensile load with the support grid. As a support grid can separate support grids interact, facing each other, for example, with their flat sides, or it may be a hollow body provided as a support grid.

In this way, it is advantageous to achieve a stiffening of the filter system from the filter housing and filter element both in a pressure-resistant and in a tensile design. Conveniently, so can be dispensed with the attachment of tie rods through the filter element for stiffening and fastening, in particular, if a central tube is present in the filter element for the necessary rigidity of the filter element. Furthermore, vibrations / resonances can thus be achieved by the coupling of the filter element and the filter housing in the case of only pressure-resistant as well as pressure-resistant and tensile design.

According to an advantageous embodiment, the element may be formed by means of plastic foam and be connected fluid-tight with the filter bellows. Alternatively, the element may be formed as an insert for a plastic foam process and be connected fluid-tight by means of plastic foam with the filter bellows. The element may thus conveniently be formed from PUR foam itself, which has the necessary rigidity to absorb tensile load and / or compressive load and to transfer it to the structure of the filter element. It is also conceivable that a plastic part is used as an insert in a plastic foam process and this insert, for example, foamed with PUR foam and is firmly connected in this way in the channel with the surrounding filter bellows. In this case, the element may protrude from PUR foam, so as to be coupled to a counter element in a filter housing. Thus, a stable and at the same time fluid-tight connection of the element to the filter bellows can be achieved in a suitable manner.

According to an advantageous embodiment, the element may be formed as a coupling element for receiving in a arranged on a filter housing of a filter system counter element. The element may conveniently be coupled with a counter element, which is arranged, for example, in an upper housing part, for example, by hooking or clipping the two elements together.

As a result, a transmission of tensile forces and / or compressive forces between the upper housing part and filter element is possible.

According to an advantageous embodiment, the element may be provided for latching with the counter element. A locking provides a very stable and at the same time safe way to couple the filter element via the element with a housing part. Also, a locking is conveniently again easy to replace when replacing the filter element.

According to an advantageous embodiment, the element may be designed to receive a tensile load and / or pressure load. If the element designed to receive a pressure load, it is sufficient to provide a support of the element and thus the filter element to the filter housing. The element can be so relatively simple, for example, designed as a support pin. In a design for tensile loading, a coupling possibility between element and housing part in the form of Verclipsung or locking can be conveniently provided so that element and housing part are connected together. A screw connection can also be provided. This connection should expediently be easily detachable for replacement of the filter element.

According to an advantageous embodiment, the at least two filter bellows sections may be part of an at least partially closed filter bellows or separately from each other be educated. The filter bellows can be designed as a closed filter bellows, which is flown by an outside with the raw fluid, which then passes through the filter bellows, so that the filtered clean fluid can collect in an inner region and can be removed. Alternatively, however, it is also possible to carry out two or more filter bellows sections separately, which can then be assembled and connected in a fluid-tight manner at the connection areas, so that the clean fluid area is likewise formed in the interior area of the filter bellows. In this embodiment, the Filterbalgabschnitte may be designed as a single flat filter.

According to an advantageous embodiment, two filter bellows sections each having at least one channel can be arranged opposite one another such that the at least two channels lie opposite one another, wherein oppositely oriented elements are provided in the channels in an axial direction. With the help of opposing elements in opposite channels of two filter bellows sections, the filter element can advantageously be supported in two directions, whereby a very effective stiffening of the filter system and also achieve a very effective damping of vibrations and / or resonances. With a corresponding design of the filter housing, it may be sufficient to design the two elements in each case for pressure loading when the filter element can be clamped by the filter housing so. Also, two housing parts of the filter housing can be conveniently connected by the filter element in this way by one of the two elements, for example, with the lower housing part and the other of the two elements are coupled to the upper housing part.

According to an advantageous embodiment, the elements may be connected in the pure fluid region by means of at least one stiffening rib. Another possibility of additional stiffening of the filter element by a stiffening rib between the two elements allows the effective transfer of introduced from the filter housing in one element forces on the other element and thus back to the filter housing. Thus, the filter element can be designed very stiff, which is advantageous because the filter bellows itself does not usually have such a high rigidity due to its material properties as a zigzag folded paper bellows or fleece.

According to an advantageous embodiment, a support grid arranged in the pure fluid region may be provided, with which support grid the at least one element is connected. Also useful is a stiffening of the filter element with a support grid, for example made of plastic, on which the filter bellows, for example by gluing, is applied. Further, so the element can be connected to this support grid, so as to initiate forces directly into the relatively stiff support grid, which can be supported on such as, for example, another element on the filter housing. As a support grid can separate support grids interact, facing each other, for example, with their flat sides, or it may be a hollow body provided as a support grid.

According to an advantageous embodiment, the at least one element can be connected via the plastic foam or directly to the support grid. Conveniently, the element can be connected directly to the support grid by clipping or locking. Alternatively, however, a foaming of the element by means of PUR foam is possible, which in turn can be foamed directly to the support grid. In this way, a secure and stable connection between element and support grid is possible.

According to an advantageous embodiment, the at least two filter bellows sections may form a round filter. Alternatively, the at least two filter bellows sections may be connected to a hinge. The filter bellows sections can form, for example, contiguous parts of a round filter, as a result of which the area of the clean fluid in an inner region of the round filter is made fluid-tight. The round filter may also be in flattened form with an oval cross-section enclosing the clean fluid region in its interior. As a further embodiment, however, filter bellows sections in a flat configuration can each be connected to outer edges with a hinge, for example a film hinge connected to a frame of the filter bellows section, thus forming a continuous filter bellows which, when installed, surrounds a clean fluid area in a fluid-tight manner. Flat filter bellows sections can be manufactured cheaply.

According to an advantageous embodiment, at least two Filterbalgabschnitte may be arranged laterally on a central tube, in particular in each case at least two Filterbalgabschnitte extending on both sides of the central tube. Filter bellows sections may be connected via a central tube, via which central tube the outlet of the filter element is also realized, by means of which the filtered pure fluid can be discharged from the inner clean fluid region. Advantageously, filter bellows sections can be arranged on both sides of the central tube, so as to form, for example, two U-shaped filter bellows to a filter element in a butterfly arrangement. Also, in each case two filter bellows sections connected by a hinge can be arranged on both sides of the central tube, which also leads to a butterfly arrangement.

According to a further aspect, the invention relates to a filter system for filtering a fluid, comprising a filter housing and a filter element interchangeable in the filter housing between a raw side and a clean side. The filter system comprises at least two Filterbalgabschnitte which include a clean fluid area, wherein in at least one of the Filterbalgschnitte a extending through the Filterbalgabschnitt extending channel is at least partially surrounded by the Filterbalgabschnitt and in which an element is disposed fluid-tight to the filter bellows section.

The filter system according to the invention advantageously has a stiffening of the entire filter system of filter housing and filter element both in a pressure-resistant and in a tensile design. The filter element itself can be screwed or plugged with the filter housing, for example. Vibrations and / or resonances that can occur in particular in the protruding Filterbalgabschnitten can be reduced by the coupling of the Filterbalgabschnitte with the filter housing via the elements both only pressure resistant and pressure-resistant and zugbelastbarer design of the elements in the channels of the Filterbalgabschnitte.

According to an advantageous embodiment, the element may be formed as a coupling element for receiving in a filter housing arranged on the counter element. The element may conveniently be coupled with a counter element, which is arranged, for example, in an upper housing part, for example, by hooking or clipping the two elements together. In this case, other types of coupling with the counter element are conceivable, such as fittings, snaps with snaps, bayonet-type connections, locks and similar compounds. In this way, a transmission of tensile forces and / or compressive forces between the upper housing part and filter element is advantageously possible.

According to an advantageous embodiment, the element can be locked to the counter element. A locking provides a very stable and at the same time safe way to couple the filter element via the element with a housing part. Also, a locking is conveniently again easy to replace when replacing the filter element.

According to an advantageous embodiment, the element may be provided for support on the filter housing. If the element designed to receive a pressure load, it is sufficient to provide a support of the element and thus the filter element to the filter housing. The element can be so relatively simple, for example, designed as a support pin.

The described filter system can advantageously be used as an air filter, in particular as an air filter of an internal combustion engine or as an interior air filter, in particular of a motor vehicle.

list of figures

• 1 eine isometrische Darstellung eines Filterelements nach einem Ausführungsbeispiel der Erfindung mit zwei einander gegenüber liegenden Elementen von einer Oberseite, welche jeweils ein Stützgitter aufweisen;
• 2 eine isometrische Darstellung des Filterelements nach 1 von einer Unterseite;
• 3 einen Querschnitt durch das Filterelement nach 1;
• 4 einen Querschnitt durch ein Filtersystem nach einem Ausführungsbeispiel der Erfindung mit einem Filterelement nach 1;
• 5 eine isometrische teilgeschnittene Darstellung eines Ausschnitts des Filterelements nach 1 von einer Oberseite;
• 6 eine isometrische teilgeschnittene Darstellung eines Ausschnitts des Filterelements nach 1 von einer Unterseite;
• 7 einen Querschnitt durch zwei Filterbalgabschnitte des Filterelements nach 1, wobei ein oberes und ein unteres Stützgitter über zwei Versteifungsrippen verbunden sind;
• 8 eine teilgeschnittene Darstellung eines Ausschnitts eines Filterelements ähnlich wie in 1 mit Schnappverbindung zwischen in Fenster der gegenüberliegenden Stützgitter eingesetzten Elementen;
• 9 einen Querschnitt durch zwei Filterbalgabschnitte des Filterelements aus 8, wobei zwei Elemente mittels einer Schnappverbindung miteinander verbunden sind, wobei die Partner der Schnappverbindung jeweils Bestandteil der Elemente sind;
• 10 eine isometrische Darstellung eines Filterelements nach einem weiteren Ausführungsbeispiel der Erfindung mit ovalem Querschnitt;
• 11 eine isometrische teilgeschnittene Darstellung des Filterelements nach 10;
• 12 einen Querschnitt durch das Filterelement nach 10; und
• 13 einen Längsschnitt durch das Filterelement nach 10.

Further advantages emerge from the following description of the drawing. In the drawings, embodiments of the invention are shown. The drawings, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations. They show by way of example:

• 1 an isometric view of a filter element according to an embodiment of the invention with two opposing elements from an upper side, each having a support grid;
• 2 an isometric view of the filter element after 1 from a bottom;
• 3 a cross section through the filter element after 1 ;
• 4 a cross section through a filter system according to an embodiment of the invention with a filter element according to 1 ;
• 5 an isometric partially sectioned view of a section of the filter element according to 1 from a top;
• 6 an isometric partially sectioned view of a section of the filter element according to 1 from a bottom;
• 7 a cross section through two filter bellows sections of the filter element according to 1 wherein an upper and a lower support grid are connected via two stiffening ribs;
• 8th a partially sectioned view of a section of a filter element similar to in 1 with snap connection between inserted in windows of the opposite support grid elements;
• 9 a cross section through two filter bellows sections of the filter element 8th wherein two elements are interconnected by means of a snap connection, wherein the partners of the snap connection are each a component of the elements;
• 10 an isometric view of a filter element according to another embodiment of the invention with an oval cross section;
• 11 an isometric partial sectional view of the filter element after 10 ;
• 12 a cross section through the filter element after 10 ; and
• 13 a longitudinal section through the filter element after 10 ,

Embodiments of the invention

In the figures, the same or similar components are numbered with the same reference numerals. The figures are merely examples and are not intended to be limiting.

The 1 and 2 show isometric representations of a filter element 10 according to an embodiment of the invention with two opposing elements 20 . 21 seen from an upper side or from an underside. The filter element 10 has four filter bellows sections 12 . 13 . 14 . 15 a filter bellows 11 on, which is a clean fluid area 50 lock in. In the filter bellows sections 12 . 13 are through the filter bellows sections 12 . 13 extending channels 16 . 17 formed by the filter bellows sections 12 . 13 are surrounded. In the filter bellows sections 12 . 13 are the elements 20 . 21 fluid-tight to the filter bellows sections 12 . 13 arranged. The filter bellows sections 12 . 13 . 14 . 15 are formed separately from each other and form by their connection via outer edges and connection to the center tube 42 an at least partially closed filter bellows 11 that the pure fluid area 50 includes. The filter bellows sections 12 . 13 . 14 . 15 are each with an outer edge laterally on the central tube 42 arranged, in each case at least two Filterbalgabschnitte 12 . 13 . 14 . 15 on both sides of the center tube 42 extend. The Filterbalgabschnitte are executed with a zigzag folded filter medium, wherein in the figures only a few folds 34 are indicated for illustration; the rest of the filter bellows sections 12 . 13 . 14 . 15 is shown as a solid body. The element 20 is as a coupling element 30 for receiving in a on a filter housing 108 a filter system 100 arranged counter element 120 and thus formed for receiving a tensile load and compressive load (see 4 ) while the item 21 for support on the filter housing 108 and is thus designed to receive a pressure load. With appropriately executed counter contour on the housing element 21 latch in this and absorb both compressive and tensile forces.

In 3 is a cross section through the filter element 10 to 1 shown, so that the internal structure of the filter element 10 is clearly visible. The filter bellows sections 12 . 13 and 14 . 15 are connected in pairs at one outer edge and with the other outer edge to the central tube 42 connected and thus form the filter bellows 11 , Two filter bellows sections in each case 12 . 13 and 14 . 15 lie opposite each other. The filter bellows sections 12 . 13 . 14 . 15 close the clean fluid area 50 one. The fluid to be filtered emerges from a raw fluid area 52 through the filter bellows 11 in the inner clean fluid area 50 and can be led out through the central tube when installed in a filter housing, for example perpendicular to the plane. The filter bellows sections 12 . 13 each have channels 16 . 17 on, in which fluid-tight elements 20 . 21 are arranged. The Elements 20 . 21 are formed as an insert for a plastic foam process and by means of plastic foam 24 with the filter bellows sections 12 . 13 each connected fluid-tight. These are the elements 20 . 21 in plastic foam 24 , For example, polyurethane foam, foamed, with the PUR foam to the Filterbalgabschnitte 12 . 13 foamed and connected fluid-tight with these. Alternatively, the elements could 20 . 21 also by means of plastic foam 24 formed in the plastic foam process and with the Filterbalgabschnitten 12 . 13 be connected fluid-tight. The filter bellows sections 12 . 13 , 14,15 are each in the clean air area 50 arranged in the figure upper support grids 40 and in the figure lower support grids 41 stiffened. The element 20 is part of the upper support grid 40 , the element 21 is via a snap connection with the lower support grid 41 connected. The two filter bellows sections 12 . 13 with the channels 16 . 17 are arranged opposite each other so that the two channels 16 . 17 face each other. Here are the elements 20 . 21 oriented in an opposite direction in the axial direction in the channels 16 . 17 . 18 arranged so that the elements 20 . 21 in each case on opposite surfaces of the filter housing 108 support or with a counter element 120 coupled, for example, locked, can be. The upper support grid in the figure 40 and the lower support grid in the figure 41 are in the pure fluid area 50 by means of two stiffening ribs 28 connected so that both tensile and compressive forces of one of the elements 20 . 21 on the other element 21 . 20 can be transmitted.

In 4 this is a cross section through a filter system 100 illustrated according to an embodiment of the invention. The filter housing 108 is purely schematic with a lower housing part 114 and an upper housing part 112 shown, wherein a fluid inlet 102 is arranged in the upper housing part. A fluid outlet for draining the filtered fluid from the clean fluid area 50 over the center tube 42 is not shown in the section. The filter system 100 has a in the filter housing 108 between the raw side 52 and the clean side 50 replaceable arranged filter element 10 with four filter bellows sections 12 . 13 . 14 . 15 on that the clean fluid area 50 lock in. In the filter bellows sections 12 . 13 are two through the Filterbalgabschnitte 12 . 13 extending channels 16 . 17 formed, each of the filter bellows sections 12 . 13 are surrounded and in which the elements 20 . 21 fluid-tight to the filter bellows sections 12 . 13 are arranged. The element 20 is part of the upper support grid in the figure 40 , the element 21 is as a separate part by means not visible in the snap connection with the lower support grid in the figure 41 connected .. The element 20 is here as a coupling element 30 for inclusion in a filter housing 108 arranged counter element 120 trained and can, for example, with the counter element 120 be connected via a latch. The element 21 is for support on the housing base 114 intended. When appropriately executed counter contour on the housing element 21 be connected to this, and it can also be absorbed traction.

5 shows an isometric partial cutaway view of a section of the filter element 10 to 1 from a top. On average, the internal structure of the filter element 10 with the two filter bellows sections 12 . 13 to recognize. The filter bellows sections 12 . 13 are from the inside with the support grid 40 stiffened, with that too in the channel 16 arranged element 20 is made in one piece. The element 20 is as a coupling element 30 with a spherical head for receiving in a counter element 120 (not shown), which may for example be equipped with a cup-shaped receptacle. The element 21 is in a window of the lower support grid 41 used and with support grid 41 by snap hook 23 locked.

6 shows in a partially cutaway isometric view a section of the filter element 10 to 1 from the bottom. Such is the bracing structure of the support grid 40 clearly visible. The element 21 protrudes over the surface of the filter bellows section 13 down to the bottom, as it supports the lower part of the housing 114 is provided. With appropriate counter contour on the housing element 21 be connected to this and also transmitted tensile forces.

In 7 is a cross section through two filter bellows sections 12 . 13 of the filter element 10 to 1 represented, wherein the upper support grid in the figure 40 and the lower support grid in the figure 41 over two stiffening ribs 28 are connected. The element 20 is one-piece with support grid 40 executed the element 21 is with support grid 41 connected by snap connection. The two support grids 40 and 41 are however by two stiffening ribs 28 connected so that forces can be transmitted. Both forces in the axial direction, ie in the direction of the alignment of the elements 20 . 21 , as well as by arranging several stiffening ribs 28 Transversely transmitted to it, so that any vibrations in the lateral direction can be reduced.

In 8th is further a partially sectioned view of a section of a filter element 10 similar to in 1 shown. In this illustration, the filter bellows section 13 also cut, leaving the arrangement of the second element 21 which is the first element 20 in the channel 17 is opposite, can be seen. In this design are the elements 20 and 21 inserted into corresponding window of the support grid 40 and 41 and by means of tubular formed snap connection, which each part of the elements 20 and 21 is interconnected and tension the support grid 40 and 41 one. By connecting the elements 20 and 21 These can also transmit tensile forces with each other.

9 shows a cross section through two filter bellows sections 12 . 13 a filter element 10 to 8th where two elements 20 . 21 via a snap connection 29 are connected. The representation in 9 shows details of the in 8th illustrated arrangement. The snap connection 29 is tubular and takes in its interior the element 20 on that way up to the opposite element 21 enough. About this snap connection 29 So can compressive forces and tensile forces of an element 20 . 21 on the opposite element 21 . 20 be transmitted. At the same time is through the tubular design a radial guidance of the element 20 given so that vibrations in the lateral direction can be stabilized and reduced over it.

10 shows an isometric view of a filter element 10 according to a further embodiment of the invention. In this embodiment, the filter bellows sections 12 . 13 . 14 . 15 a continuous round filter having an oval cross-section. The round filter 10 is cone-shaped and closed at the tapered end with an end plate. The end plate is circumferentially surrounding with a seal for sealing between Rohfluidbereich 52 and clean fluid area 50 when installed in a filter housing 108 and unspecified positioning elements for more accurate positioning during installation provided.

11 shows an isometric partial cut view of the filter element 10 to 10 in which the open end of the filter element 10 to recognize which the outlet 104 forms for the filtered fluid. The outlet is circulating with a seal 32 for sealing between raw fluid area 52 and clean fluid area 50 Mistake. The filter bellows 11 of the round filter element 10 is also with a trained as a hollow body support grid 43 stiffened. In addition, there are cross braces 44 to reinforce the support grid 43 and / or a (not shown) center tube fed, which for additional stability of the filter bellows 11 to care. The filter element 10 has in the Filterbalgabschnitten 12, 14, 15 channels 16 . 17 . 18 on, in which the elements 20 . 22 are arranged, which in the cross-sectional view in 12 are better to recognize. The two arranged on the narrow sides of the oval filter element elements 22 are for support on a filter housing 108 (not shown) while the element 20 as a coupling element 30 designed to absorb tensile loads and compressive loads. In cross-section is also the stiffening of the filter bellows 11 with the support grid 43 as well as the cross struts 44 to recognize. The Elements 20 . 22 are by snap connections with the support grid 43 connected and with plastic foam 24 sealed against the filter bellows.

In 13 is a longitudinal section through the filter element 10 to 10 shown. In this section is just the element 20 to recognize, since the two other elements 22 lie outside the cutting plane.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 2582443 B1 [0003, 0005]

Claims (17)

A filter element (10) for filtering a fluid comprising at least two filter bellows sections (12, 13, 14, 15) including a clean fluid section (50), wherein in at least one of the filter bellows sections (12, 13, 14, 15) extends through the Filter bellows portion (12, 13, 14, 15) extending channel (16, 17, 18) is formed, which is at least partially surrounded by the Filterbalgabschnitt (12, 13, 14, 15) and in which an element (20, 21, 22 ) is arranged fluid-tight to the filter bellows section (12, 13, 14, 15). Filter element after Claim 1 wherein the element (20, 21, 22) is formed by means of plastic foam (24) and fluid-tightly connected to the filter bellows section (12, 13, 14, 15), or wherein the element (20, 21, 22) serves as an insert for a plastic foaming process formed and fluid-tight manner by means of plastic foam (24) with the filter bellows portion (12, 13, 14, 15). Filter element according to one of the preceding claims, wherein the element (20, 21, 22) as a coupling element (30) for receiving in a on a filter housing (108) of a filter system (100) arranged counter element (120) is formed. Filter element after Claim 3 wherein the element (20, 21, 22) is provided for latching with the counter element (120). Filter element according to one of the preceding claims, wherein the element (20, 21, 22) is designed to receive a tensile load and / or pressure load. Filter element according to one of the preceding claims, wherein the at least two Filterbalgabschnitte (12, 13, 14, 15) are part of an at least partially closed filter bellows (11) or formed separately from each other. Filter element according to one of the preceding claims, wherein two Filterbalgabschnitte (12, 13, 14, 15), each with at least one channel (16, 17, 18) are arranged opposite each other so that the at least two channels (16, 17, 18) opposed, wherein in an axial direction oppositely oriented elements (20, 21, 22) in the channels (16, 17, 18) are provided. Filter element after Claim 7 wherein the elements (20, 21, 22) in the clean fluid region (50) are connected by means of at least one snap connection (29). Filter element according to one of the preceding claims, wherein in the clean fluid region (50) arranged support grid (40, 41, 43) is provided, with which support grid (40, 41, 43), the at least one element (20, 21, 22) is connected. Filter element after Claim 9 wherein the at least one element (20, 21, 22) is connected via the plastic foam (24) or directly to the support grid (40, 41, 43). Filter element after Claim 9 wherein the opposed support grids (40, 41) or the opposite sides of a support grid (43) which receive the elements (20, 21, 22) are connected by means of at least one stiffening rib (28). Filter element according to one of the preceding claims, wherein the at least two Filterbalgabschnitte (12, 13, 14, 15) form a round filter, or wherein the at least two Filterbalgabschnitte (12, 13) are connected to a hinge. Filter element according to one of the preceding claims, wherein at least two Filterbalgabschnitte (12, 13, 14, 15) are arranged laterally on a central tube (42), wherein in particular at least two Filterbalgabschnitte (12, 13, 14, 15) on both sides of the central tube ( 42) extend. Filter system (100) for filtering a fluid, with a filter housing (108) and in the filter housing (108) between a raw side (52) and a clean side (50) interchangeable filter element (10), in particular according to one of the preceding claims, with at least two filter bellows sections (12, 13, 14, 15) which enclose a clean fluid region (50), wherein in at least one of the filter bellows sections (12, 13, 14, 15) extends through the filter bellows section (12, 13, 14, 15) extending channel (16, 17, 18) is at least partially surrounded by the Filterbalgabschnitt (12, 13, 14, 15) and in which a member (20, 21, 22) fluid-tight to the filter bellows portion (12, 13, 14 , 15) is arranged. Filter system after Claim 13 in that the element (20, 21, 22) is designed as a coupling element (30) for receiving in a counter element (120) arranged on the filter housing (108). Filter system after Claim 14 , wherein the element (20, 21, 22) is locked with the counter element (120). Filter system according to one of Claims 13 to 15 wherein the element (20, 21, 22) is provided for support on the filter housing (108).

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