Filter element and filter system

Abstract

The invention relates to a filter element (10), in particular a secondary element, for filtering a fluid, comprising at least one filter medium body (12) having a circumferential seal (14) on an outer circumference (13) of the filter medium body (12), the invention relates to a filter element for providing a seal in an axial direction (60) when the filter element is installed as intended in a filter housing (110) of a filter system (100). According to the invention, the seal (14) has a part of the connecting device (20), which part provides an interlocking fastening action in the axial direction (60) and which part is designed to correspond to another part of the connecting device (20) on the filter housing (110). The invention also relates to a filter system having a replaceable filter element (10) of said type.

Description

Technical Field

[0001] The invention relates to a filter element for filtering a fluid, in particular a secondary element, comprising at least one filter medium body, which is used in particular in an internal combustion engine or as an interior air filter, in particular an interior air filter of a motor vehicle, and to a filter system having a replaceable filter element. Background Art

[0002] Filter elements, particularly those used as secondary or safety elements, seal the clean side of a filter system against the raw side, particularly when replacing the main filter element. In this case, it is crucial that the secondary element maintains a reliable seal at its mounting location when the filter housing is opened to replace the main filter element. After removing the housing top and the main filter element (which are typically placed one on top of the other), the secondary element remains in place and prevents damage to the motor.

[0003] A radial sealing interface for sealing the filter element in the filter housing is often used in filter elements, particularly when flat filter elements are used as secondary elements. In this case, a grid arranged transversely to the flow direction supports the seal in the radial direction. Given the large installation space, the grid must be designed to be suitably robust in order to compensate for deformations while still providing the required tightness.

[0004] DE 102016006607 A1 describes a filter system in which a free-foaming axial seal is used to seal the filter system. The seal is designed so that it can prevent the seal from being pulled out of the corresponding housing-side sealing chamber in the installed state. Summary of the Invention

[0005] The object of the present invention is to provide a filter element, in particular a secondary element, for filtering fluids, which comprises at least one filter medium body with a seal and can be easily and securely mounted in a filter housing.

[0006] Another object is to provide a filter system comprising such a filter element, which can be easily and securely installed.

[0007] According to one aspect of the present invention, the above-mentioned object is achieved by a filter element, in particular a secondary element, for filtering fluid, the filter element comprising at least one filter medium body, the filter medium body comprising a seal extending circumferentially around the outer periphery of the filter medium body for axial sealing when installed in a filter housing of a filter system in the axial direction as intended, wherein the seal comprises a portion of a connecting device that is fixed substantially in the axial direction by form fit and is configured to correspond to another portion of the connecting device at the filter housing.

[0008] According to another aspect of the present invention, the other object is achieved by a filter system for filtering fluid, which filter system includes a filter housing and at least one filter element for filtering fluid, in particular a secondary element, which filter element is replaceably arranged between an untreated side and a clean side in the filter housing and includes at least one filter medium body, wherein the filter housing includes a circumferentially extending sealing groove, in which a seal of the filter element is received when the filter element is installed as intended, wherein the sealing groove of the filter housing includes at least one part of a connecting device, which is fixed essentially in an axial direction by a form fit, and which is configured to correspond to another part of the connecting device at the at least one filter element, in particular wherein the connecting device is configured as a snap-fit connection.

[0009] Advantageous embodiments and advantages of the invention emerge from the further claims, the description and the drawings.

[0010] A filter element, in particular a secondary element, for filtering a fluid is proposed. The filter element comprises at least one filter medium body, the filter element including a seal surrounding the outer periphery of the filter medium body for axial sealing when installed in the intended axial direction in a filter housing of a filter system. In this case, the seal comprises a portion of a connecting device that is fixed substantially in the axial direction by a form fit and is configured to correspond to another portion of the connecting device on the filter housing.

[0011] In this context, an "axial direction" is understood to be a direction parallel to the main flow direction through the filter element.

[0012] In this context, a “positive fit” is understood to mean that the substantially axially fixed portion of the connection device is designed to fix the filter element relative to the filter housing in the axial direction by interacting with another portion of the connection device arranged on the filter housing, by means of a direct transmission of a holding force, which extends in the axial direction or at least includes an axial component. This is in contrast to the frictional holding effects known from the prior art, according to which the holding force is exchanged orthogonally or perpendicularly to the axial direction.

[0013] The sealing-relevant part of the connection device that is fixed substantially in the axial direction by a positive fit is in an embodiment particularly designed as a single piece, in particular integrally, together with the seal. In particular, the part of the connection device that is fixed substantially in the axial direction by a positive fit can be produced together with the seal during a molding process, in particular by casting or injection molding.

[0014] The proposed filter element represents an air filter element that is used, in particular, as a secondary element or safety element. In this case, when the main filter element of the filter system is replaced, the secondary element seals the clean side against the untreated side. Advantageously, when the filter housing is opened to replace the main filter element, the secondary element maintains a reliable sealing effect at its installation location.

[0015] The filter media body may include cellulose-based and / or synthetic nonwoven media and may be implemented as a filter element with a polyurethane seal (PUR seal) foamed directly onto the filter media body.

[0016] In this case, the polyurethane seal in the proposed filter element is advantageously designed in such a way that it engages the housing interface or snaps into place there.

[0017] This filter element is particularly useful in flat air filter elements for commercial vehicles. It includes an axial seal rather than a radial seal and features a standardized housing profile in the area of the safety element and the main element. For example, an additional locking nose on the seal engages the housing, ensuring that the filter element remains in its sealed position when the main element is replaced.

[0018] The disadvantages of radial sealing concepts, which exhibit high compression and bonding forces due to the high friction between the PUR foam and the housing, can be avoided by using axial sealing. In addition, the same sealing profile can be used on the safety element as well as the main element, resulting in a significant advantage in standardization of the resulting construction.

[0019] According to an advantageous embodiment of the filter element, the part of the connection means at the seal can be configured as part of a snap-fit connection.In this way, the filter element can remain in its sealed position when the main element is replaced.

[0020] According to an advantageous embodiment of the filter element, a plurality of snap-fit elements can be arranged on the seal, which are inclined relative to the axial direction, in particular protruding perpendicularly. In particular, the snap-fit elements can be embodied as projections protruding obliquely relative to the axial direction, in particular perpendicularly, or as depressions. The projections on the filter element and the depressions on the filter housing can advantageously engage with each other, so that the filter element is reliably held in its position.

[0021] According to an advantageous embodiment of the filter element, the connection means at the seal can be located on at least two opposite sides of the filter medium body. In this case, preferably, at least two snap-fit elements can be arranged on at least two opposite sides of the filter medium body. This allows the filter element to remain in its sealed position when the main element is replaced.

[0022] According to an advantageous embodiment of the filter element, the portion of the connecting means at the seal can include a protuberance extending obliquely, in particular vertically, with respect to the axial direction, and an undercut configured to be operatively connected to another portion of the connecting means at the filter housing. The other portion of the connecting means at the filter housing can include a rib extending obliquely, in particular vertically, with respect to the axial direction, which can be received in the undercut over the protuberance. With this combination of the sealing member and the connecting means at the filter housing, the filter element can also remain in its sealed position when the main element is replaced.

[0023] According to an advantageous embodiment of the filter element, the bulge can be embodied at least in sections so as to extend circumferentially over the outer periphery of the seal.The segmented arrangement of the sealing device can be sufficient to hold the filter element in its sealing position when the main element is replaced.

[0024] According to an advantageous embodiment of the filter element, the portion of the connection means at the seal may comprise a groove extending circumferentially at least in sections and recessed in the axial direction, and the groove being configured for operative connection to another portion of the connection means at the filter housing. Alternatively, the portion of the connection means at the seal may comprise a rib extending circumferentially at least in sections and protruding axially away from the seal. With this combination of the connection means at the seal and the filter housing, the filter element can remain in its sealed position even when the main element is replaced.

[0025] According to an advantageous embodiment of the filter element, the grooves and / or the ribs can comprise undercuts. In this way, a particularly secure fixation of the filter element in its position can be achieved.

[0026] According to another aspect of the present invention, a filter system for filtering a fluid is proposed, comprising a filter housing and at least one filter element for filtering the fluid, in particular a secondary element, which is replaceably arranged in the filter housing and comprises at least one filter medium body. The filter housing comprises a circumferentially extending sealing groove, in which a seal of the filter element is received when the filter element is installed as intended. In this case, the sealing groove of the filter housing comprises at least one portion of a connecting device, which is fixed essentially in the axial direction by a form fit and is configured so as to correspond to another portion of the connecting device at the at least one filter element. In particular, the connecting device can be embodied as a snap-fit connection.

[0027] Advantageously, the proposed filter system includes an air filter element, which serves in particular as a secondary element or safety element. In this case, when the main filter element of the filter system is replaced, the secondary element seals the clean side against the untreated side. Advantageously, when the filter housing is opened to replace the main filter element, the secondary element maintains a reliable sealing effect at its installation location.

[0028] In this case, the polyurethane seal is advantageously embodied in such a way that it engages the housing interface or snaps into place there.

[0029] This filter system is particularly useful in the commercial vehicle sector. The filter element includes an axial seal rather than a radial seal and features a standardized housing profile in both the safety element and the main element. For example, an additional locking nose on the seal engages the housing, ensuring that the filter element remains in its sealed position when the main element is replaced.

[0030] The disadvantages of radial sealing concepts, which exhibit high compression and bonding forces due to the high friction between the PUR foam and the housing, can be avoided by axial sealing. In addition, the same sealing profile can be used on the safety element as well as on the main element, resulting in significant advantages in standardization of the filter system's construction.

[0031] According to an advantageous embodiment of the filter system, the part of the connection device at the filter housing can comprise a plurality of snap-fit elements which project obliquely, in particular perpendicularly, relative to the axial direction and are configured for operative connection to another part of the connection device at the filter element. In this way, the filter element can remain in its sealed position when the main element is replaced.

[0032] According to an advantageous embodiment of the filter system, the snap-fit element can be configured as a depression or protrusion that protrudes obliquely, particularly vertically, with respect to the axial direction. Like this, when replacing the main element, the filter element can be kept in its sealing position in a beneficial manner.

[0033] According to an advantageous embodiment of the filter system, the portion of the connection device at the filter housing can include a rib extending obliquely, in particular perpendicularly, relative to the axial direction, which rib is configured for operative connection to another portion of the connection device at the filter element. Alternatively, this portion of the connection device can include a protrusion extending obliquely, in particular perpendicularly, relative to the axial direction and include an undercut. With this combination of a seal and a connection device at the filter housing, the filter element can remain in its sealed position even when the main element is replaced.

[0034] According to an advantageous embodiment of the filter system, the ribs and / or ridges may be embodied so as to extend circumferentially at least in sections.The segmented arrangement of the sealing device may be sufficient to hold the filter element in its sealing position when the main element is replaced.

[0035] According to an advantageous embodiment of the filter system, the portion of the connecting device at the filter housing may include a rib that extends circumferentially at least in sections and protrudes in the axial direction, and the rib is configured to be operably connected to another portion of the connecting device at the filter element. Alternatively, the portion of the connecting device at the filter housing may include a groove that extends circumferentially at least in sections and is recessed in the axial direction. In particular, in this case, the corners of the sealing groove may not have a connecting device. Utilizing this combination of the connecting device at the seal and the filter housing, the filter element can also remain in its sealed position when the main element is replaced.

[0036] According to an advantageous embodiment of the filter system, the ribs and / or grooves can comprise undercuts. In this way, a particularly secure fixation of the filter element in its position can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Further advantages can be derived from the following description of the drawings. The drawings illustrate exemplary embodiments of the invention. The drawings, the description, and the claims contain many combinations of features. A person skilled in the art will also readily consider these features individually and combine them into further convenient combinations. This is illustrated in an exemplary manner in:

[0038] Figure 1 is an exploded view of a filtration system according to an embodiment of the present invention;

[0039] Figure 2 yes Figure 1 An enlarged detail of a diagram showing parts of the connection arrangement of the filter element and the filter housing;

[0040] Figure 3 It passes through Figure 1 Details of the cross section of the filtration system;

[0041] Figure 4 Shown Figure 3 An enlarged detail of a diagram showing parts of the connection means of the filter element and the filter housing;

[0042] Figure 5 is based on Figure 1 Isometric illustration of a filter element;

[0043] Figure 6 is an enlarged detail of various parts of a connection device of a filter element and a filter housing according to another embodiment of the present invention;

[0044] Figure 7 is an isometric illustration of a housing bottom for receiving a filter element according to another embodiment of the present invention;

[0045] Figure 8 is corresponding to Figure 7 An isometric illustration of the filter element at the bottom of the housing;

[0046] Figure 9 is in the seal area through the Figure 8 Magnified detail of a cross section of a filter element;

[0047] Figure 10 It passes through Figure 9 an enlarged detail of a cross section of a seal groove in a housing bottom for receiving a seal;

[0048] Figure 11 is an enlarged plan view of the housing bottom in the corner area of the sealing groove;

[0049] Figure 12 It passes through Figure 10 Enlarged detail of a cross section of the sealing groove of the housing bottom with an inserted filter element;

[0050] Figure 13 is a detail of a cross section of a filtration system according to another embodiment of the present invention;

[0051] Figure 14 is in the seal area through the Figure 13 Magnified detail of a cross section of a filter element;

[0052] Figure 15 is in the sealing groove area through the Figure 13 Enlarged detail of the cross section of the shell bottom;

[0053] Figure 16 is based on Figure 15 An enlarged plan view of the housing bottom in the corner area of the sealing groove of an embodiment;

[0054] Figure 17 is based on Figure 15 A plan view of the bottom of the housing of an embodiment;

[0055] Figure 18 is an enlarged detail of a cross section through the housing bottom in the region of the sealing groove according to another embodiment of the invention; and

[0056] Figure 19 is based on Figure 18 Enlarged detailed cross-section through the filter element in the area of the seal of an embodiment of FIG. DETAILED DESCRIPTION

[0057] In the drawings, the same or similar components are denoted by the same reference numerals. The drawings are merely examples and are not to be construed as limiting.

[0058] Figure 1 An exploded view of a filtration system 100 is shown in accordance with an embodiment of the present invention.

[0059] The filter system 100 includes a filter housing 110 having a housing top 112 and a housing bottom 114. The housing bottom 114 includes an inlet 102 and an outlet 104 for the fluid to be filtered.

[0060] Two main filter elements 70 are arranged in the filter housing 110, with the filter element 10 serving as a secondary element or safety element downstream of the filter element in the flow direction. The main filter elements 70 are positioned between the raw side 50 and the clean side 52 of the filter system 100. The filter elements 10 are positioned on the clean side 52 and remain in their installed position when the main filter elements 70 are replaced. This protects the downstream fluid lines and, for example, the motor from contamination during filter changes. The filter elements 10 are also replaceable.

[0061] The fluid to be filtered enters the filter housing 110 through the inlet 102. The fluid flows through the primary filter element 70 from bottom to top in the drawing plane. At the top side of the primary filter element 70, the fluid flows toward the secondary element 10. The secondary element 10 flows from top to bottom until the fluid flows out of the filter housing 110 again through the outlet 104.

[0062] The filter element 10 includes a filter media body 12 formed, for example, from cellulose and / or nonwoven media. For example, the filter media can be pleated.

[0063] The filter medium body 12 includes a seal 14 that extends circumferentially around an outer periphery 13 of the filter medium body 12 and is used for axial sealing when installed in the filter housing 110 of the filter system 100 in the axial direction 60 as intended. The seal 14 includes a portion of the connection device 20 that is fixed substantially in the axial direction 60 by a form fit and that is configured to correspond to another portion of the connection device 20 at the filter housing 110.

[0064] To receive the filter element 10 , the filter housing 110 includes a circumferentially extending sealing groove 120 in which the seal 14 of the filter element 10 is received when the filter element 10 is installed as intended.

[0065] The sealing groove 120 of the filter housing 110 comprises a further part of the connection device 20. The connection device 20 is in particular formed as a snap-fit connection.

[0066] Figure 2 Provided in this case Figure 1 1 , with parts of the connection device 20 of the filter element 10 and the filter housing 110 .

[0067] The portion of the connection device 20 at the seal 14 of the filter element 10 is formed as part of a snap-fit connection. For this purpose, a plurality of snap-fit elements 22 projecting obliquely, in particular perpendicularly, relative to the axial direction 60 are provided at the seal 14. In the embodiment shown, the snap-fit elements 22 are designed as projections 24 projecting obliquely, in particular perpendicularly, relative to the axial direction 60.

[0068] The portion of the connection device 20 at the filter housing 110 comprises a plurality of snap-fit elements 22 which project obliquely, in particular perpendicularly, relative to the axial direction 60 and are configured for operative connection to another portion of the connection device 20 at the filter element 10. In the embodiment shown, these snap-fit elements 22 are designed as recesses 26 which extend obliquely, in particular perpendicularly, relative to the axial direction 60.

[0069] Figure 3 Shown through the Figure 1 Detail of a cross section of the filter system 100. Figure 4 In the figure, the connection device 20 with the filter element 10 and the parts of the filter housing 110 can be seen. Figure 3 Zoomed in details.

[0070] In particular, in the cross section, it can be seen how the projection 24 of the seal 14 engages the recess 26 or cutout of the sealing groove 120 of the housing bottom 114. When the filter element 10 is inserted into the housing bottom 114, the projection 24 snaps into the recess 26 of the sealing groove 120 and, in this way, locks the filter element 10 in the housing bottom 114. In this way, the filter element 10 is secured against accidental removal from the housing bottom 114, which is particularly important when the housing is opened during the replacement of the at least one main filter element 70.

[0071] The seal 14 engages around the edge of the filter medium body 12 because the seal 14, which is made of, for example, polyurethane (PUR), is foamed onto the filter medium body 12. The seal 14 is received in the sealing groove 120 in terms of its cross section. When the filter housing 110 is closed, the sealing edge of the housing top 112 rests on the seal 14, pressing the seal 14 into the sealing groove 120 and thus achieving an axial sealing effect of the filter element 10 in the axial direction 60 against the outlet 104 of the filter housing 110.

[0072] Figure 5 An isometric view of the filter element 10 is shown. The portion of the connection device 20 at the seal 14 is advantageously positioned at at least two opposing sides 16, 18; 17, 19 of the filter medium body 12. Figure 5 In the embodiment shown, snap-fit elements 22 are arranged on all longitudinal sides 16 , 18 ; 17 , 19 in order to achieve a secure locking of the filter element 10 in the sealing groove 120 of the housing bottom 114 .

[0073] Figure 6 Shown are enlarged details of parts of the filter housing 110 and the connection device 20 of a filter element 10 according to another embodiment of the invention.

[0074] In this embodiment, the projection 24 as the snap-fit element 22 of the connecting device 20 is arranged in the sealing groove 120, while the seal 14 comprises a recess 26 as the corresponding snap-fit element 22. In this way, a secure locking of the filter element 10 in the sealing groove 120 of the housing bottom 114 can also be achieved.

[0075] Figure 7 An isometric illustration of a housing bottom 114 for receiving a filter element 10 according to another embodiment of the present invention is shown. Figure 8 An isometric illustration of a corresponding filter element 10 is shown in FIG. Figure 9 In this case, the seal 14 is shown through the Figure 8 An enlarged detail of a cross section of the filter element 10, and Figure 10 Shown through the Figure 9Detail of the cross section of the sealing groove 120 of the housing bottom 114 for receiving the seal 14 .

[0076] In this embodiment, the portion of the connecting device 20 at the seal 14 includes a protrusion 30 extending obliquely, in particular perpendicularly, relative to the axial direction 60, and an undercut 34 configured for operative connection to another portion of the connecting device 20 at the filter housing 110. To this end, the portion of the connecting device 20 at the filter housing 110 includes a rib 32 extending obliquely, in particular perpendicularly, relative to the axial direction 60. When the filter element 10 is inserted into the housing bottom 114, the rib 32 engages through the protrusion 30 of the seal 14 and engages with the undercut 34, locking the seal 14 at the rib 32. In this way, the filter element 10, together with the seal 14, is locked in the sealing groove 120 of the housing bottom 114 and cannot accidentally slide out of the sealing seat.

[0077] It is sufficient when the ridges 30 of the seal 14 are formed at least in sections so as to extend circumferentially on the outer periphery 13; likewise, in order to achieve sufficient fixation of the filter element 10 in the housing bottom 114, the ribs 32 at the sealing groove 120 of the housing bottom 114 can be formed so as to extend circumferentially only in sections.

[0078] Figure 11 An enlarged plan view of the housing bottom 114 is shown in the corner region of the sealing groove 120, wherein it can be seen that the rib 32 is cut away in the corner region of the sealing groove 120. In this way, the production of the housing bottom 114 can be facilitated due to the required removal during injection molding.

[0079] exist Figure 12 In the figure, the passage is shown according to Figure 10 An enlarged detail of a cross section of sealing groove 120 of housing bottom 114 with inserted filter element 10. Ribs 32 of sealing groove 120 have penetrated into undercuts 34 of ridges 30 of seal 14 and are therefore no longer visible. Seal 14 is thus locked in sealing groove 120, and filter element 10 is thus securely fixed in housing bottom 114.

[0080] Figure 13 Shown is a cross-sectional detail through a filtration system 100 according to another embodiment of the invention.

[0081] In this embodiment, the portion of the connecting device 20 at the seal 14 includes a groove 40 that extends at least partially circumferentially and is recessed in the axial direction 60, and is configured for operative connection with another portion of the connecting device 20 at the filter housing 110. To this end, the portion of the connecting device 20 at the filter housing 110 includes a rib 44 that extends at least partially circumferentially and protrudes in the axial direction 60. When the filter element 10 with its seal 14 is inserted into the seal groove 120, the rib 44 of the seal groove 120 engages with the groove 40 of the seal 14, so that the seal 14 is locked in the seal groove 120.

[0082] Figure 14 The diagram shows a flow through the seal 14 in the region of the Figure 13 An enlarged detail of the cross section of the filter element 10, while Figure 15 FIG. 1 shows a sealing groove 120 in the region of the sealing groove 120 through the Figure 13 Detail of the cross section of the housing bottom 114 .

[0083] As can be seen in the figure, the groove 40 includes an undercut 42, and the rib 44 also includes an undercut 46. Due to the two undercuts 42, 46, when the rib 44 and groove 40 are joined, the rib 44 can be locked in the groove 40, so that the seal 14 is fixed in the sealing groove 120, and thus the filter element 10 is fixed in the sealing groove 120.

[0084] Here, when the ribs 44 in the sealing groove 120 are formed so as to extend circumferentially only in sections, it is also sufficient to fix the seal 14 of the filter element 10 .

[0085] Figure 16 In this case, according to Figure 15 An enlarged plan view of the housing bottom 114 in the corner area of the sealing groove 120 of the embodiment of the present invention is shown. Figure 17 Shown is a plan view of a housing bottom 114 having a receiving portion for the entire filter element 10. Compared to the previous embodiment, the filter element 10 in this embodiment is formed into a rectangular shape. As can be seen in both figures, ribs 44 are provided, particularly at the corners of the sealing groove 120. In this way, the manufacturing of the housing bottom 114 can be facilitated based on the removal required during injection molding.

[0086] In an alternative embodiment, the portion of the connection device 20 at the seal 14 can include a rib 44 that extends at least partially circumferentially and projects away from the seal 14 in the axial direction 60, while the portion of the connection device 20 at the filter housing 110 can include a groove 40 that extends at least partially circumferentially and is recessed in the axial direction 60. In this case, when the filter element 10 with the seal 14 is inserted into the seal groove 120, the rib 44 of the seal 14 can engage the groove 40 of the seal groove 120, and the seal 14 can be locked in the seal groove 120 in this manner. In this way, the filter element 10 can be fixed in the housing bottom 114. In particular, in this case, the corners of the seal groove 120 can also remain free of the connection device 20, so that the production of the housing bottom 114 is facilitated due to the removal required during injection molding.

[0087] Figure 18 In this case, an enlarged detail of a cross section through the housing bottom 114 in the region of the sealing groove 120 is shown, wherein the groove 40 is visible in the sealing groove 120 .

[0088] exist Figure 19 , an enlarged detail of a cross section through the filter element 10 in the region of the seal 114 is illustrated, which enables the ribs 44 corresponding to the grooves 40 in the seal 14 to be seen.

[0089] Reference numerals

[0090] 10 filter element

[0091] 12 Filter media body

[0092] 13 surrounding areas

[0093] 14 Seals

[0094] 16 sides

[0095] 17 side

[0096] 18 sides

[0097] 19 side

[0098] 20 Connecting device

[0099] 22 snap-fit components

[0100] 24 protrusion

[0101] 26 Depression

[0102] 30 bulge

[0103] 32 ribs

[0104] 34 Undercut

[0105] 40 slots

[0106] 42 Undercut

[0107] 44 ribs

[0108] 46 Undercut

[0109] 50 Untreated side

[0110] 52 Clean side

[0111] 60 axial direction

[0112] 70 Main Components

[0113] 100 Filtration System

[0114] 102 Entrance

[0115] 104 Exit

[0116] 110 filter housing

[0117] 112 Shell top

[0118] 114 Shell bottom

[0119] 120 sealing groove

Claims

1. A filter element (10), in particular a secondary element, for filtering a fluid, comprising at least one filter medium body (12), said filter medium body comprising a seal (14) extending circumferentially around an outer periphery (13) of said filter medium body (12) for axial sealing when installed in a filter housing (110) of a filter system (100) in an axial direction (60) as intended, in, The seal (14) comprises a portion of the connection device (20) which is fixed in the axial direction (60) by form fit and is configured so as to correspond to another portion of the connection device (20) at the filter housing (110).

2. The filter element according to claim 1, wherein The portion of the connection device (20) at the seal (14) is configured as part of a snap-fit connection.

3. The filter element according to claim 1 or 2, wherein The portion of the connection device (20) at the seal (14) is constructed as one part together with the seal (14), in particular is integral with the seal (14), in particular is produced together with the seal (14) in a molding process, in particular casting or injection molding.

4. The filter element according to any one of claims 1 to 3, wherein The portion of the connection device (20) at the seal (14) is configured to directly transmit a retaining force in an axial direction (60) in operable contact with the portion of the connection device (20) at the filter housing (110).

5. The filter element according to any one of claims 1 to 4, wherein At the seal (14), a plurality of snap-fit elements (22) are arranged to protrude obliquely, in particular perpendicularly, relative to the axial direction (60), in particular, wherein the snap-fit elements (22) are constructed as protrusions (24) protruding obliquely, in particular perpendicularly, relative to the axial direction (60), or as recesses (26) extending obliquely, in particular perpendicularly, relative to the axial direction (60).

6. The filter element according to any one of the preceding claims, wherein The portion of the connection device (20) at the seal (14) is present at least at two opposite sides (16, 18; 17, 19) of the filter medium body (12), in particular preferably at least two snap-fit elements (22) are arranged at least at two opposite sides (16, 18; 17, 19) of the filter medium body (12).

7. The filter element according to claim 1, wherein The portion of the connecting device (20) at the seal (14) comprises a ridge (30) extending obliquely, in particular perpendicularly, relative to the axial direction (60), and comprises an undercut (34), which is configured for operative connection to another portion of the connecting device (20) at the filter housing (110), wherein, in particular, the other portion of the connecting device (20) at the filter housing (110) comprises a rib (32) protruding obliquely, in particular perpendicularly, relative to the axial direction (60), which can be received in the undercut (34) over the ridge (30).

8. The filter element according to claim 7, wherein The ridge (30) is configured so as to extend circumferentially in sections at least at the outer periphery (13) of the seal (14).

9. The filter element according to claim 1, wherein The portion of the connecting device (20) at the seal (14) comprises a groove (40) extending circumferentially at least in sections and recessed in the axial direction (60), the groove being configured for operative connection to the other portion of the connecting device (20) at the filter housing (110), or The portion of the connection device (20) at the seal (14) comprises a rib (44), which extends circumferentially at least in sections and projects away from the seal (14) in the axial direction (60).

10. The filter element according to claim 9, wherein The groove (40) and / or the rib (44) include undercuts (42, 46).

11. A filter system (100) for filtering a fluid, comprising a filter housing (110) and at least one filter element (10), in particular a secondary element for filtering a fluid according to any one of the preceding claims, which is replaceably arranged in the filter housing (110) and comprises at least one filter medium body (12), in, The filter housing (110) includes a circumferentially extending sealing groove (120) in which the seal (14) of the filter element (10) is received when the filter element (10) is installed as intended. The sealing groove (120) of the filter housing (110) comprises at least one portion of a connection device (20) fixed in an axial direction (60) by form fit, said portion being configured to correspond to another portion of the connection device (20) at the at least one filter element (10), in particular, wherein the connection device (20) is configured as a snap-fit connection.

12. The filtration system according to claim 11, wherein: The portion of the connecting device (20) at the filter housing (110) comprises a plurality of snap-fit elements (22), which project obliquely, in particular perpendicularly, relative to the axial direction (60) and are configured for operative connection to the other portion of the connecting device (20) at the filter element (10).

13. The filtration system according to claim 12, wherein: The snap-fit element (22) is formed as a depression (26) or a projection (24) which projects obliquely, in particular perpendicularly, with respect to the axial direction (60).

14. The filtration system according to claim 11, wherein: The portion of the connecting device (20) at the filter housing (110) comprises a rib (32) which extends obliquely, in particular perpendicularly, relative to the axial direction (60) and is configured for operative connection to the other portion of the connecting device (20) at the filter element (10), or Therein, the portion of the connecting device (20) comprises a bulge (30) extending obliquely, in particular perpendicularly, to an axial direction (60) and comprises an undercut (34).

15. The filtration system according to claim 14, wherein: The rib (32) or the ridge (30) is configured to extend circumferentially at least in sections.

16. The filtration system according to claim 11, wherein: The portion of the connection device (20) at the filter housing (110) comprises a rib (44) which extends circumferentially at least in sections and projects in the axial direction (60), the rib being configured for operative connection to another portion of the connection device (20) at the filter element (10), or The portion of the connecting device (20) at the filter housing (110) comprises a groove (40) extending circumferentially at least in sections and recessed in the axial direction (60), and in particular, the corners of the sealing groove (120) are free of the connecting device (20).

17. The filtration system according to claim 16, wherein: The rib (44) or the groove (40) includes an undercut (42, 46).

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