Filter element, filter system having a filter element and method

Abstract

The invention relates to a filter element (10) for a filter system (100) for filtering a fluid, in particular a gaseous fluid, having a longitudinal axis (L) and a filter bellows (12) arranged about the longitudinal axis (L), the filter bellows enclosing an interior space (50), and the filter element having, at least on one end (30), a closed end disk (32) which closes the interior space (50) on the end (30), and the filter element having, on an opposite end (20), an end disk (22) with an opening (24) to the interior space (50), wherein the closed end disk (32) has a hollow core shaft (60) which projects into the interior space (50) in the direction of the longitudinal axis (L). The invention furthermore relates to a filter system (100) having such a filter element (10).

Description

Technical Field

[0001] The present invention relates to a filter element, a filter system having the filter element, and a method for installing such a filter system. Background Technology

[0002] The intake air of an internal combustion engine is typically cleaned of impurities by an air filter before entering the combustion chamber. The air filter element used for this purpose may have a star-shaped pleated filter media, which annularly surrounds the longitudinal axis. For commercial vehicles, such as heavy-duty trucks, this filter element can have a length greater than 300 mm, especially greater than 500 mm. The filter element must be reliably secured within its filter housing. Because the filter media mixes with particles filtered from the air during operation, the filter element needs to be replaced periodically.

[0003] WO 2011 / 045220 A2 discloses a filter element comprising a filter element and a frame surrounding the side of the filter element, wherein the frame carries an axial seal. The seal contacts a sealing surface of a filter housing. The frame has first and second contact surfaces on two opposing sides of the filter element for pressing the filter element with first and second clamping elements. The filter element can be moved into the filter housing through a mounting opening on the side. The clamping element can be constructed as a clamping strip on a cover for closing the mounting opening. Summary of the Invention

[0004] The objective of this invention is to provide a filter element for a filtration system that is easily replaceable.

[0005] Another objective of the present invention is to provide a filtration system having such a filter element.

[0006] According to one aspect of the invention, the above-mentioned task is solved by a filter element of a filter system for filtering fluids, especially gaseous fluids, having a longitudinal axis and a filter bellows arranged around the longitudinal axis, the filter bellows surrounding an internal space, and the filter element having at least one end a closed end plate that closes the internal space at the end, and an opposite end plate with an opening to the internal space, wherein the closed end plate has a hollow mandrel that extends into the internal space along the direction of the longitudinal axis.

[0007] According to one aspect of the invention, an additional task is solved using a filtration system for filtering fluids, having a replaceable filter element housed in its housing, wherein the housing includes a cover and a housing component that can be closed by the cover, wherein the filter element closes its internal space by means of its filter bellows, and has a closed end plate at one end that closes the internal space at the end, and an end plate at the opposite end with an opening to the internal space, wherein the closed end plate has a hollow mandrel that extends into the internal space along the longitudinal axis, and the housing component has a corresponding hollow mandrel that can be moved thereon.

[0008] The advantageous designs and benefits of the present invention will become apparent from the additional claims, description and drawings.

[0009] According to a first aspect of the invention, a filter element for a filtration system for filtering, particularly gaseous, fluids is provided, having a longitudinal axis and a filter bellows arranged around the longitudinal axis, the filter bellows surrounding an internal space, and the filter element having at least one end a closed end disc that closes the internal space at the end, and an opposite end disc with an opening to the internal space, wherein the closed end disc has a hollow mandrel that extends into the internal space along the direction of the longitudinal axis.

[0010] Advantageously, the filter element can be linearly guided by a spindle during installation into and removal from the housing. This is particularly advantageous for large filter elements, which can have a large weight, at least in the loaded state. Similarly, the filter element can be installed at an angle or flat, as linear guidance simplifies handling of the filter element.

[0011] Advantageously, especially for internal combustion engines in motor vehicles, particularly commercial vehicles, filter elements can be configured to filter air.

[0012] According to an advantageous design of the filter element, the mandrel may have a locking element on its inner side facing away from the internal space. This locking element, when installed in the housing, is configured to cooperate with corresponding locking elements on the housing components. Advantageously, especially in the flat or tilted positions of the filter element, the locking element can be used to prevent tilting. The locking element can be a locking lug, a hemmed edge, etc. Advantageously, in the tilted or horizontal positions of the filter element within its housing, the locking element is disposed on the upper surface of the mandrel, thereby holding the filter element in its position.

[0013] According to advantageous designs of the filter element, the mandrel can have a cross-section in which the locking element can be arranged in a defined, particularly definite angular position relative to the longitudinal axis. The mandrel can, in particular, have a cross-section that differs from a circle, especially a T-shape, ellipse, or polygonal shape. Thus, a dedicated surface for the locking element can be provided in a simple manner. The mandrel is preferably designed such that it has a support surface or plane that extends substantially along the longitudinal axis and is arranged perpendicular to the direction of gravity, wherein a hollow mandrel preferably has a corresponding support surface that can be located on and / or slid on the support surface on the side of the mandrel during installation. If the corresponding locking element is provided on the support surface, then the locking element can be engaged near the end position or inserted from the rear when the filter element is moved into the housing, and thus prevent the filter element from sliding out before the mounting cover is installed. In the case of a T-shaped hollow mandrel, the support surface is preferably formed by a crossbeam of Ts. In the case of a polygonal cross-section, the sides of the polygonal, substantially rhomboid mandrel and / or hollow mandrel are oriented substantially perpendicular to the direction of gravity in the installation position.

[0014] The mandrel and / or hollow mandrel of the housing preferably have a shape that is mirror-symmetrical with respect to a plane of symmetry that extends vertically and preferably centrally through the housing in the mounting position.

[0015] The filter bellows can have shapes other than circular, but these shapes also have a symmetry that is mirror-symmetric with respect to a central plane, independent of each other. This can be, for example, an elliptical, oval shape, or a rounded polygon, such as a rounded quadrilateral.

[0016] By using the preferred combination of the two aforementioned symmetries of the filter bellows and the mandrel on the housing and filter element side, the filter element can be precisely fixed in position within the housing during installation, so that after the filter element is installed, the cover can be easily installed on the filter element using the housing in a simultaneously sealed and close fit.

[0017] Preferably, the hollow spindle of the filter element and the spindle on the housing side extend into the internal space along the longitudinal axis with a length greater than 20%, preferably greater than 25%, of the total length of the filter element, and preferably less than 50% of the total length of the filter element. This ensures sufficient mounting surface to support the horizontal installation or positioning of the filter element, and more preferably, avoids excessive tilting before installing the housing cover.

[0018] According to an advantageous design of the filter element, the filter bellows can have a slit that is locally limited along the longitudinal axis. Advantageously, the slit can work in conjunction with the housing to prevent the filter element from tilting.

[0019] According to the advantageous design of the filter element, the cutout can be arranged in a defined, particularly precise angular relationship with the locking element. This allows for proper pre-positioning of the filter element when it is installed into the housing.

[0020] According to an advantageous design of the filter element, the cut can originate from the closed end disc. Preferably, the closed end disc can be cut at a slit in the filter bellows. The cut end disc can be advantageously held on the mating element in the housing by means of a friction fit.

[0021] According to an advantageous design of the filter element, two peripherally spaced protrusions can project radially onto the closed end plate. These protrusions can serve as spacers for the housing walls during installation and removal. By maintaining a minimum distance from the housing, the filter bellows can be protected from damage during installation and removal. Elements extending into the housing can also be protected from damage by the filter element.

[0022] According to an advantageous design of the filter element, the end plate having an opening to the internal space can have a bulge that partially surrounds the opening and protrudes outward along the longitudinal axis. The bulge can be used to compress the filter element axially in the installed state. Preferably, the bulge is formed of an elastic material, such as polyurethane. Preferably, the bulge is integrally constructed with the end plate. The bulge can be used to support the filter element and stabilize its position in the installed state, especially when the filter element is tilted or horizontally positioned.

[0023] According to another aspect of the invention, a filtration system for filtering fluids, particularly gaseous fluids, is provided, the filtration system having a replaceable filter element housed in its housing, wherein the housing includes a cover and a housing component that can be closed by the cover, wherein the filter element closes its internal space by means of its filter bellows, and has a closed end plate at one end that closes the internal space at the end, and an end plate at the opposite end with an opening to the internal space, wherein the closed end plate has a hollow mandrel that extends into the internal space along a longitudinal axis, and the housing component has a corresponding hollow mandrel that can be moved thereon.

[0024] Preferably, the cover, and in particular the pure fluid channel arranged in the cover, can be sealed to the internal space of the filter element, and in particular the pure side of the filter element.

[0025] Advantageously, linear guidance can be provided, allowing the hollow mandrel of the filter element to move onto the mandrel of the housing. This reduces the burden on the user when installing and removing the filter element. This is particularly advantageous for large filter elements, such as those used in commercial vehicles. The linear guidance of the filter element also simplifies installation in difficult and confined spaces.

[0026] For internal combustion engines, especially in motor vehicles and commercial vehicles, the filtration system is preferably configured to filter the air.

[0027] According to an advantageous design of the filtration system, the hollow mandrel may have a locking element on its inner side, which can engage with a corresponding locking element of the mandrel in the housing component. Advantageously, this allows for stable positioning of the filter element even in inclined or horizontal positions.

[0028] According to an advantageous design of the filtration system, the housing component can have receptacles for radially projecting protrusions spaced apart on the periphery of the closed end disc. This allows for easy insertion and removal of the filter element from the housing. A defined end position of the filter element within the housing can also be achieved.

[0029] According to an advantageous design of the filtration system, the housing component may have a cutout corresponding to a cutout on the filter bellows and / or on the closed end disc of the filter element. The cutout on the housing side may, in particular, form a frictional fit with the cutout and / or the cut-out closed end disc. The filter element may be protected against vibration, and / or especially against tilting when the filter element is installed in the housing.

[0030] According to an advantageous design of the filtration system, the cover can have a receiving portion corresponding to the raised portion, wherein the raised portion is arranged on an end plate having an opening leading to an internal space and can partially surround the opening, and wherein the raised portion can be received within the receiving portion. Advantageously, the filter element can be supported in the receiving portion not only along the longitudinal axis of the filter element but also laterally thereto by the raised portion. Here, the raised portion and the receiving portion can be configured as a sealing raised portion and a corresponding sealing receiving portion.

[0031] According to another aspect of the invention, a method for installing a filtration system is provided, wherein the filter element according to the invention is moved into the housing component when the cover is removed, and is moved forward into the housing component substantially horizontally along its longitudinal axis by means of a closed end disc, such that the hollow mandrel of the closed end disc is moved, in particular, onto the corresponding mandrel of the housing component, and is preferably held in the moved-in position by a releasable locking connection.

[0032] Subsequently, the cover can be installed onto the housing component, thereby achieving a sealed fluid connection between the cover and the filter element, particularly between the pure fluid passage arranged in the cover and the internal space of the filter element, and / or between the cover and the housing. Attached Figure Description

[0033] Further advantages are described in the following figures, which illustrate embodiments of the invention. The figures, description, and claims contain a large number of combined features. Suitablely, those skilled in the art can also contemplate these features individually and generalize them into other meaningful combinations. Exemplarily illustrated in the figures: Figure 1 A filter element according to a first embodiment of the present invention is shown, which has expanded pleats at the ends of the filter element; Figure 2 It shows according to Figure 1 The filter element has expanded pleats at opposite ends of the filter element; Figure 3 It shows according to Figure 1 A top view of the closed end disc of the filter element; Figure 4 It shows according to Figure 1 Details of the filter element on its closed end disc; Figure 5 It shows according to Figure 1 Details of the filter element on its open end disc; Figure 6 It shows crossing according to Figure 1 The longitudinal section of the filter element; Figure 7 A longitudinal section through a filtration system with a housing is shown, according to Figure 1 The filter element is installed in the housing; Figure 8 It shows according to Figure 7 A top view of the filtration system; Figure 9 It shows according to Figure 7 Details of the filtration system on its closed end disc; Figure 10 It shows according to Figure 7 Details of the filtration system on its open end disc; Figure 11 The first side shows according to Figure 7 An isometric view of the filtration system; Figure 12 The second side, opposite to the first side, shows the... Figure 7 An isometric view of the filtration system; Figure 13 It shows according to Figure 7 An exploded view of the filtration system; Figure 14 A filter element according to another example of the invention is shown, which has a ring for locally expanding the distance between the pleats of the filter bellows before the end disc is applied; Figure 15 It shows according to Figure 14 The filter element has a foaming end disc; Figure 16 It shows crossing according to Figure 14 The longitudinal section of the filter element; Figure 17 It shows according to Figure 14 A top view of the filter element; Figure 18 It shows according to Figure 14 Details of the filter element on the end disc; Figure 19 It shows the method for using according to Figure 14 A top view of the filter element ring; Figure 20 It shows according to Figure 19 An isometric view of the ring; Figure 21 A filter element according to another example of the invention is shown, which has a support tube for locally expanding the distance between the pleats of the filter bellows; Figure 22 It shows crossing according to Figure 21 The longitudinal section of the filter element; Figure 23 It shows according to Figure 21 A top view of the filter element; Figure 24 It shows according to Figure 21 Details of the filter element on the end disc; Figure 25 It shows the passage used according to Figure 21 The longitudinal section of the support tube for the filter element; Figure 26 It shows according to Figure 25 Isometric view of the support tube; Figure 27 It shows according to Figure 25 Top view of the support tube; Figure 28 It shows according to Figure 25 Details of the support tube; Figure 29 A longitudinal section passing through a filter element according to an embodiment of the invention is shown; Figure 30 It shows according to Figure 29 Details of the filter element on its open end disc; Figure 31 It shows according to Figure 29 Further details of the filter element on its open end disc; Figure 32 It shows Figure 29 A three-dimensional view of the filter element as seen from its open end plate; Figure 33 It shows according to Figure 29 A three-dimensional view of the filter element as seen from its closed end plate; Figure 34 It shows the method for using according to Figure 29 The support tube for the filter element; Figure 35 It shows the method for targeting according to Figure 29 The closed end plate of the filter element is a bubble-cast shell; Figure 36 It shows the method for targeting according to Figure 29 The filter element has an open end plate with a foaming casting shell; Figure 37 A flowchart is shown for a method of manufacturing a filter element according to an embodiment of the present invention; Figure 38 An exploded view of a filtration system according to an embodiment of the present invention is shown, the filtration system having according to Figure 29 Filter elements; Figure 39 It shows crossing according to Figure 38 The longitudinal section of the filtration system; Figure 40 It shows crossing according to Figure 38 The longitudinal section of the filtration system, which has installation accessories; Figure 41 It shows according to Figure 38 A perspective view of a filtration system, which has an open housing and according to Figure 29 The installed filter element; Figure 42 It shows according to Figure 38 A perspective view of the housing of the filtration system; Figure 43 It shows crossing according to Figure 38 The cross-section of the filtration system, which has according to Figure 29 The installed filter element; Figure 44 The following are shown from different perspectives. Figure 38 A perspective view of a filtration system, which has an open housing and according to Figure 29The installed filter element; Figure 45 It shows according to Figure 38 A perspective view of the internal space of the housing of a filtration system, which has a bulge housing. Figure 46 The import is shown according to Figure 38 According to the housing of the filtration system Figure 29 Filter elements; Figure 47 It shows according to Figure 38 An isometric view of the outer side of the cover of the housing of the filtration system; Figure 48 It shows according to Figure 38 An isometric view of the inside of the cover of the housing of the filtration system; Figure 49 It shows crossing according to Figure 39 Details of the longitudinal section of the filtration system, which has a closed cover on the clean side of the filtration system; Figure 50 It shows crossing according to Figure 39 The longitudinal section of the cross-section; Figure 51 A filtration system according to another embodiment of the invention, having a cover and a seal, is shown in an enlarged view; Figure 52 It shows according to Figure 51 Exploded view of the seals and caps of the filtration system; Figure 53 It shows according to Figure 52 A perspective view of the assembly of the cover and seals; Figure 54 It shows according to Figure 51 A side view of the filtration system; Figure 55 It shows crossing according to Figure 51 The longitudinal section of the filtration system; Figure 56 It shows crossing according to Figure 51 The cross-section of the pure fluid connector of the filtration system cover; Figure 57 It shows crossing according to Figure 51 The cross-section of the initial fluid side of the cover of the filtration system. Detailed Implementation

[0034] In the accompanying drawings, the same or similar parts are indicated by the same reference numerals. The drawings are merely illustrative and should not be construed as limiting.

[0035] Figures 1 to 13 Using filter element 10 ( Figures 1 to 6) and filter housing 102 and filtration system 100 ( Figures 7 to 13 The first embodiment of the present invention is described below.

[0036] As from Figure 1 and 2 As such, the filter element 10 has a filter bellows 12 that extends along the longitudinal axis L and surrounds the internal space 50.

[0037] The filter bellows 12 is formed, for example, of a pleated filter material, which forms a closed filter bellows 12 and is arranged on the support tube 70. The support tube 70 may have inwardly pointing ribs.

[0038] 14 folds Figure 1 and 2 The pleats 14 are shown only as an example and extend over the total length of the filter bellows 12. The longitudinal edges 16 of the pleats 14 are located in the peripheral side surface 18 of the filter bellows 12. The filter bellows 12 is constructed as a circular element in this example.

[0039] End discs 22 and 32 are arranged on a first end 20 on the end side of the filter element 10 and a second end 30 on the end side opposite to the first end. The end discs seal the filter bellows 12 on the end edges of the filter bellows. The end discs 22 and 32 can be formed in a common manner, for example, by foamed polyurethane.

[0040] An end disc 22 that opens toward the inner space 50 is arranged on the first end 20. A closed end disc 32 is arranged on the opposite second end 30. The closed end disc 32 has an outwardly protruding arc-shaped spacer 34 that surrounds the spindle 60 pointing toward the inner space 50 at a constant radius. The spacer 34 can be used to support the filter element 10 in the housing.

[0041] The open end plate 22 has an outwardly pointing ring 26 that surrounds the opening 24 in the end plate 22. The ring 26 can serve as a seal. Preferably, the end plate 22 and the ring 26 are integrally constructed. The end plate with the ring 26 can be formed of polyurethane, in particular.

[0042] The flow direction of the fluid to be filtered is indicated by the filter bellows 12. If its pure side is located inside, the fluid flows into the internal space 50 from the outside of the filter bellows 12 and flows out of the filter element 10 through the opening 24. Alternatively, the flow direction can be reversed.

[0043] The filter bellows 12 has slits 40 and 44 at its two ends 20 and 30, respectively. The axial lengths 42 and 46 of the slits along the longitudinal axis L are shorter than the longitudinal extension of the filter bellows 12 along the longitudinal axis L. The slits 40 and 44 are partially confined and do not extend over the entire length of the filter bellows 12. Preferably, the slits 40 and 44 have the largest fold edge distance on the respective end discs 22 and 32, and gradually decrease as the distance from the end discs 22 and 32 increases.

[0044] Cuts 40 and 44 widen the distance between two adjacent pleats, wherein pleat 14 extends generally over the entire length of the filter bellows 12.

[0045] Preferably, the cuts 40 and 44 are staggered around the perimeter, for example, staggered by 180º on opposite sides of the filter bellows 12. The cuts may also be staggered from each other at angles other than 180º.

[0046] A retaining element 90 can be provided between the cuts 40 and 44 to ensure that the distance between the pleats 14 remains constant in this area. Alternatively, common retaining elements 90 can be provided, such as wire, adhesive tape, hot melt tape, or a molded portion (“pleat lock”) transverse to the longitudinal edge 16 of the pleat 14.

[0047] The cuts 40 and 44 can be formed in different ways. After the optional fixing element 90 has been installed, the cuts can be introduced into the filter bellows 12. The cuts 40 and 44 can be introduced into the filter bellows 12 during the manufacture of the end discs 22 and 32, or through an opening element on an insert component or support tube. The two cuts 40 and 44 on the filter bellows 12 can be formed in the same way or in different ways.

[0048] Optionally, it can be configured that only one cut 40 or 44 exists on the filter element 10.

[0049] As in Figures 3 to 6 As seen in the image, cuts 40 and 44 originate from notches in end discs 22 and 32. Figure 3 It shows according to Figure 1 A top view of the closed end disc 32 of the filter element 10. Figure 4 Details of the filter element 10 on its closed end disc 32 are shown, and Figure 5 Details of the filter element 10 on its open end disc 22 are shown. Figure 6 It shows crossing according to Figure 1 The longitudinal section of the filter element 10.

[0050] Advantageously, the notch can cause a frictional engagement with the mating element in the housing 102 when the filter element 10 is installed, and reduces the risk of tilting when the filter element 10 is installed into the housing 102.

[0051] The cuts 40 and 44 maintain their shape through the material of the end discs 22 and 32.

[0052] It is possible here that the end discs 22, 32 have small protrusions in the notches relative to the folds opened by the corresponding cuts 40, 44. This enables compression of the cuts 40, 44 when installed into the housing components, which have mating profiles corresponding to the cuts 40, 44 respectively.

[0053] Alternatively, if notches 40 and 44 are provided in the region of the filter bellows 12 adjacent to the end discs 22 and 32, then only one of the end discs 22 and 32 may have a notch or neither may have a notch. This allows for radial sealing using the edge of the unnotched end disc.

[0054] In this embodiment, the closed end plate 32 has an inwardly arched surface, with a mandrel 60 extending into the internal space 50 arranged in the middle of the surface.

[0055] The cuts 40 and 44 allow the filter element 10 to be correctly positioned within the housing. Working in conjunction with the mandrel 60, this ensures stable positioning of the filter element 10. This is particularly advantageous if the filter element 10 is installed in a flat housing. The cuts 40 and 44 and the mandrel 60 prevent the filter element 10 from tilting.

[0056] The filtration system 100 with housing 102 is in Figures 7 to 13 As shown in the image. Here, Figure 7 A longitudinal section is shown through the filtration system 100 having housing 102, according to Figure 1 The filter element 10 is installed in the housing. Figure 8 A top view of the filtration system 100 is shown, and Figure 9 and Figure 10 Details of the filtration system 100 on the closed end plate 32 and the open end plate 22 of the filter element 10 are shown. Figure 11 An isometric view of the filtration system 100 is shown from the first side, and Figure 12 An isometric view of the filtration system 100 is shown from the second side opposite the first side. Figure 13 An exploded view of the filtration system 100 is shown.

[0057] The housing 102 is composed of a first housing component 104, such as a housing pot, and a second housing component 106, such as a lid. The two housing components 104 and 106 are detachably connected to each other at a connection 105. The second housing component 106 has an inwardly arched surface at its end, which corresponds to the arched end of the closed end plate 32 of the filter element 10.

[0058] The housing 102 has corresponding cutouts 120 and 122, which match the cutouts 40 and 44 on the filter element 10 at its open first end disc 22 and its closed second end disc 32. In the top view of the housing 102, Figure 8 This can be seen in the image. Cutout 122 is provided in the housing 102 corresponding to cutout 44 on end 30 having closed end disc 32.

[0059] The housing 102 has a first fluid connector 110, such as an air inlet, and a second fluid connector 112, such as an air outlet. The first fluid connector 110 is tangentially arranged on a first housing part 104 of the housing 102, so that fluid can enter the housing 102 tangentially, for example. The second fluid connector 112 is constructed as an intermediate sleeve 114 on the first housing part 104, and the second fluid connector extends longitudinally L away from the filter element 10.

[0060] like Figure 9 As shown, the spacer bulge 34 of the closed end disc 32 rests against the inside of the second housing component 106 and allows the filter element 10 to be securely clamped in the closed housing 102 in the axial direction. This allows for improved stability in the event of vibration during operation of the filter element 10. The cutout 122 is at least partially embedded in the cutout 44 of the filter element 10.

[0061] The open end disc 22 of the filter element 10 is wrapped around the edge of the sleeve 114 extending into the internal space 50 by a ring 26, and is sealed radially inward relative to the edge, as in Figure 10 As can be seen in the image. The cut 120 is at least partially embedded in the cut 40 of the filter element 10.

[0062] exist Figure 11 and Figure 12 The side view of the filtration system 100 can be seen, which reveals the opposite positions of the cutouts 120 and 122 in the first and second housing components 104 and 106.

[0063] Figure 13The exploded view shows the following components: the housing top 104 of the filtration system 100, the filter element 10, and the housing cover 106. The filter element 10 can be oriented into the housing 102 through the cutouts 40, 44 and the cutouts 120, 122 in the housing 102.

[0064] Figures 14 to 20 Another embodiment of the invention is shown, which has a first manufacturing possibility of one or more cutouts 40 in the filter element 10. In this variant, the cutouts 40 are created in the filter bellows 12 of the filter element 10 by an insert 250 having a cutout structure 252 that is embedded in the filter bellows 12 between two pleats and opens the pleats. The insert ring 250 may, for example, be placed in a casting mold during the manufacture of a bubbly, for example, open end plate 22, and is connected to the end plate 22 and the filter bellows 12 in this manner.

[0065] The other elements of filter element 10 are corresponding to Figures 1 to 13 Additional elements of the previous embodiments are referenced to the embodiments to avoid unnecessary repetition.

[0066] Figure 14 A filter element 10 according to another example of the invention is shown, which has a ring 250 for partially expanding the distance between the pleats 14 of the filter bellows 12 before the end disc 22 is applied. Figure 15 A filter element 10 is shown, which has a foaming end disc 22 and an embedded insertion ring 250. Figure 16 A longitudinal section is shown through the filter element 10 having an insertion ring 250 in an open end disc 22. Figure 17 A top view of the open end plate 22 of the filter element 10 is shown, and Figure 18 Details of the filter element 10 in the connection area, namely the end plate 22, the filter bellows 12, and the insertion ring 250, are shown.

[0067] The filter bellows 12 is arranged on the support tube 70. The support tube 70 may have inwardly pointing ribs.

[0068] Figure 19 and Figure 20 Different views of the insertion ring 250 are shown. The notch structure 252 protrudes from the annular surface of the insertion ring 250 in the axial direction. In the radial direction, the notch structure 252 does not actually have a protrusion relative to the annular surface. In this way, the notch structure 252 can be inserted between the two folds 14 and compress the folds apart.

[0069] The cutout structure 252 is constructed in an approximately wedge shape and includes two arched, interconnected wings 251 that extend symmetrically outward from their contact surfaces. The cross-section through the connected wings 251 is approximately V-shaped and constructed in an approximately wedge shape, wherein the two wings 251 of the cutout structure 252 meet at the middle of the wedge.

[0070] The front edge of the cut structure 252 is straight and extends parallel to and aligned with the longitudinal edge 16 of the pleat 14. The rear side of the cut structure 252 is rounded by the rounding of the wing 251 and gradually tapers outward. The pleats 14 in the filter bellows 12 can be carefully expanded through the rounded connecting gap and the surface of the wing 251.

[0071] Figures 21 to 28 A further variation is shown for creating at least one cutout 44 in the filter bellows 12 of the filter element 10, wherein the cutout structure 72 is provided on the support tube 70 of the filter element 10. The support tube 70 may have inwardly pointing ribs.

[0072] Figure 21 A filter element 10 with a support tube 70 is shown, the support tube being configured to locally expand the distance between the pleats 14 of the filter bellows 12. Figure 22 The longitudinal section is shown, and Figure 23 A top view of the filter element 10 is shown. Figure 24 Details of the filter element 10 on its closed end disc 32 are shown. Figure 25 The longitudinal section is shown, and Figure 26 An isometric view of the support tube 70 is shown. Figure 27 A top view of the support tube 70 is shown, and Figure 28 Details of the support tube 70 are shown.

[0073] The other elements of filter element 10 are corresponding to Figures 1 to 13 Additional elements of the embodiments are described above, which are used to avoid unnecessary repetition.

[0074] As from Figure 21 and 22 As such, the cut 44 in the filter bellows 12 is caused by the cut structure 72 of the support tube 70 on the closed end disc 32 of the filter element 10. Normally, the support tube 70 is closed at its closed end using the disc 74. In this example, the cut structure 72 is arranged on the closed end of the support tube 70.

[0075] The cut structure 72 of the support tube 70 is embedded between the two folds 14 and expands outward in the radial direction to increase the distance between them. In the end disc 32, a notch is formed in the region of the cut structure 72.

[0076] The cut-out structure 72 protrudes radially from the support tube 70 according to the thickness of the filter bellows 12 and extends axially into the filter bellows 12. The cut-out structure 72 is constructed in an approximately wedge shape and includes two arched, interconnected wings 71 that extend symmetrically outward from their contact surfaces.

[0077] The cross-section of the connecting wing 71 is constructed in an approximately V-shape, wherein the two wings 71 of the cut structure 72 meet in the middle of the wedge. The wings 71 are, for example, rounded, so that the pleats 14 in the filter bellows 12 can be carefully expanded.

[0078] The front edge of the cut structure 72 is straight and extends parallel to and aligned with the longitudinal edge 16 of the pleat 14. The rear side of the cut structure 72 is rounded by the rounding of the wing 71 and gradually tapers outward. In this way, the cut structure 72 can be inserted between the two pleats 14 of the filter bellows 12 and squeeze the pleats apart. The pleats 14 in the filter bellows 12 can be carefully expanded through the rounded connecting gap and the surface of the wing 71.

[0079] The filter bellows 12, which have support tubes 70 and cut-out structures 72, are tightly connected to each other when the end plate 32 is poured.

[0080] Figures 29 to 33 A variation of the filter element 10 according to another embodiment of the invention is shown, which has an open end disc 22.

[0081] Figure 29 A longitudinal section through the filter element 10 is shown. Figure 30 Details of the filter element 10 on the open end plate 22 are shown. Figure 31 Further details of the filter element 10 on the open end disc 22 are shown. Figure 32 A perspective view of the filter element 10 as seen from its open end plate 22 is shown. Figure 33 An isometric view of the filter element 10 as seen from its closed end disc 32 is shown.

[0082] The filter element 10 has a filter bellows 12 that extends along the longitudinal axis L and surrounds the internal space 50. The filter bellows 12 is formed, for example, of a pleated filter material that is arranged in a closed manner on the support tube 70.

[0083] The pleats 14 of the filter bellows 12 extend along the entire length of the filter bellows 12. The longitudinal edges 16 of the pleats 14 are located in the peripheral side surface 18 of the outer side of the filter bellows 12. In this example, the filter bellows 12 has a cross-section with two opposing arcuate sections (connected by straight regions).

[0084] End discs 22 and 32 are arranged on a first end 20 on the end side of the filter element 10 and a second end 30 on the end side opposite to the first end along the longitudinal axis L. The end discs seal the filter bellows 12 on their end edges. The end discs 22 and 32 can be formed in a common manner, for example, by foamed polyurethane.

[0085] An end disc 22 that opens toward the internal space 50 is arranged on the first end 20. A closed end disc 32 is arranged on the opposite second end 30. The closed end disc 32 has an outwardly protruding arc-shaped spacer 34 that surrounds the spindle 60 pointing toward the internal space 50. The spacer 34 can be used to support the filter element 10 in the housing 102. The spacer 34 is preferably integrally constructed with the end disc 32.

[0086] The open end plate 22 has an outwardly pointing ridge 28, which, for example, surrounds the opening 24 in the end plate 22. The ridge 28 is preferably integrally constructed with the end plate 22. The ridge 28 has an approximately U-shaped shape and extends approximately U-shaped around the opening 24 of the end plate 22, such that a portion of the opening 24 is surrounded by the ridge 28, and a portion is un-ridged. The ridge 28 surrounds approximately three-quarters of the periphery of the central opening 24.

[0087] Here, the unprotruding area of ​​the opening 24 of the end plate 22 preferably has an edge 29, which is particularly strongly rounded. Fluid can escape into the clean channel through the unprotruding area of ​​the opening 24.

[0088] The raised portion 28 can be used to support the filter element 10 in the housing. This is particularly advantageous in the housing, where the filter element 10 is installed flat, i.e., tilted or horizontally oriented relative to the longitudinal axis L.

[0089] Due to manufacturing technology limitations, a casting mold 210 is constructed in the first end plate 22. Figure 36 The molded portion of the spacer 218 is in the casting mold, and the first end plate 22 is connected to the filter bellows 12 by a pure air seal 25. The first end plate 22 and the pure air seal 25 on the peripheral side are made of polyurethane.

[0090] Due to manufacturing technology reasons, the second end plate 32, like the first end plate 22, has a molding portion (not shown in detail), which is formed by casting mold 200. Figure 35 The spacing is caused by the spacer. The molded portion of the second end disc 32 is constructed to be as continuous as possible around the perimeter and is only interrupted in the area of ​​the cutout 44.

[0091] The flow direction of the fluid to be filtered is indicated by the filter bellows 12. If the clean side of the filter bellows is located inside, the fluid flows from the outside of the filter bellows 12 into the internal space 50, and from there flows out from the filter element 10 through the opening 24. Alternatively, the flow direction can be reversed.

[0092] The filter bellows 12 has a cutout 44 at its second end 30, the axial length 46 of which is shorter than the longitudinal extension of the filter bellows 12 along the longitudinal axis L. The cutout 44 is locally restricted and does not extend over the entire length of the filter bellows 12. Preferably, the cutout 44 has the largest crease distance on the end disc 32 and gradually decreases with increasing distance from the end disc 32.

[0093] The cut 44 expands only the distance between two adjacent pleats 14, wherein the pleats 14 generally extend over the entire length of the filter bellows 12.

[0094] A retaining element 90 may be provided between the cutout 44 and the opposite open end disc 22 to ensure that the distance between the pleats 14 remains constant in this area. Alternatively, common retaining elements 90 may be provided, such as wire, adhesive tape, hot melt tape, molded portions (“pleat locks”) transverse to the longitudinal edges 16 of the pleats 14, etc.

[0095] The cut 44 can be created in different ways. The cut can be introduced into the filter bellows 12 after the optional fixing element 90 has been placed. The cut 44 can also be introduced into the filter bellows 12 during the manufacture of the end disc 32.

[0096] Alternatively, it can be configured, as in the embodiments, in Figures 1 to 13 Cuts 40 and 44 are respectively placed on the two ends 20 and 30 of the filter element 10.

[0097] The open end plate 22 protrudes radially beyond the filter bellows 12 via the protrusion 23, and can be used as a radial seal 25. Figure 30 , 31 The protrusion 23 is preferably at least 3 mm, preferably at least 5 mm, particularly preferably at least 6 mm, further preferably at least 8 mm, further preferably at least 10 mm, especially preferably at least 8 mm, and at most 15 mm. Alternatively or additionally, the protrusion 25 can also provide an axial seal between two housing components, such as the cover 130 and housing component 104, by axially pressing the protrusion between the two housing components 130, 104, and thus forming an axial seal. Furthermore, alternatively or additionally, a ring-shaped, axially extending sealing ridge, preferably conforming to the shape of the end plate 22, can be used on the outer end face of the end plate 22. Figures 1 to 28Similar embodiments, particularly radial seals in circular or elliptical shapes, or using modifications having two mutually parallel annularly surrounding sealing ridges, wherein at least one sealing ridge provides a radial sealing surface outward and / or inward, or using radial seals constructed on the radial inner peripheral surface of the end disc 22. These options may also be used in other embodiments of the invention, particularly according to Figures 1 to 28 In this embodiment, it is used alternatively or additionally. The cover 130 has a corresponding mating sealing surface for each selected embodiment.

[0098] On the side of the end plate 22 where the raised portion 28 is arranged, the protrusion 23 of the end plate 22 is smaller than the protrusion on the opposite side. Alternatively, the end plate 22 may also be constructed with a constant surrounding protrusion 23.

[0099] On the closed end plate 32, a hollow, for example T-shaped mandrel 60 extends into the internal space 50. The mandrel 60 can be used as an installation aid when installing the filter element 10 into the housing 102.

[0100] Two peripherally spaced protrusions 36 are arranged on the side of the end plate 32 opposite to the cutout 44, protruding radially beyond the end plate 32. The protrusions serve as mounting aids, thereby keeping the filter bellows 12 and the end plate 32 spaced from the housing wall when the filter element 10 is moved into its housing.

[0101] The support tube 70 has inwardly extending ribs 78 along its length, which can be used to position the support tube 70 in the casting shell for the end discs 22, 32.

[0102] On the closed end plate 32, a hollow spindle 60 extends into the internal space 50. The spindle 60 can serve as an installation aid when installing the filter element 10 into the housing 100. This is particularly useful in... Figures 39 to 46 As seen in these figures, a filtration system 100 with a filter element 10 installed in a housing 102 is shown.

[0103] Figure 34 A support tube 70 for the filter element 10 is shown, having inwardly pointing ribs 78 extending axially along the body 76 of the support tube 70. At an end subsequently disposed on an open end disc 22, the support tube 70 has a wide surrounding edge 80. The edge 80 serves as a support structure, and is here configured in a grid-like manner in the region of the first end disc 22, with radial struts and a circumferentially surrounding ring, between which orifices (not shown in detail) are provided. The material of the end disc 22, such as polyurethane, can pass through the orifices, thus completely embedding the edge 80 within the end disc 22.

[0104] At the end of the subsequently closed end disc 32, a mandrel 60 can be seen in the middle. The mandrel 60 may be formed of a non-elastic material, like the support tube 70. The support tube 70 is closed at this end by a disc 74, and the mandrel 60 extends axially from the disc into the internal space.

[0105] Figure 35 The following casting shell 200 is shown for use in accordance with... Figure 29 The closed end disc 32 of the filter element 10 bubblees, and Figure 36 The following casting shell is shown for use with respect to... Figure 29 The filter element has an open end plate 22 that bubbles. A void 75 is provided at the transition from the edge 80 to the body 76 of the support tube 70, and the material of the end plate 22 can be embedded in the void.

[0106] In the casting shell 200 of the end plate 32 for closure, a mandrel profile 203 is visible in the middle, which is complementary to the mandrel 60 in the support tube 70, and the support tube 70 can be inserted into the mandrel profile. A cutout structure 202 is provided for embedding between two pleats 14 of the filter bellows 12 arranged on the support tube 70, and for opening the pleats.

[0107] Two bump profiles 204 are configured to create bumps 36. A recess 206 is configured as a bulge profile for a bulge 34. The bulge profile 34 is surrounded by a surrounding groove 201, which is interrupted in the cut structure.

[0108] The casting shell 210 for opening the end plate 22 includes a raised profile 212 and a sleeve 216. A raised portion 28 of the end plate 22 is formed in the raised profile, and the sleeve defines an opening 24 for the end plate 24. A receiving portion 214 is constructed on the outside of the sleeve 216, which receives an inwardly extending rib 78 of the support tube 70. Furthermore, a protrusion 218 is provided, which surrounds the sleeve 216 at a constant distance. The element 218 is embedded in the outwardly surrounding edge 80 of the support tube 70. Additionally, small protrusions 220 are distributed on the sleeve 216, which are embedded in the openings 75 of the support tube 70 for anchoring.

[0109] The two casting shells 200 and 210 can be oriented in a way that the support tube 70, having a mandrel 60, is placed on the mandrel profile 203 of the casting shell 200 of the closed end plate 22, and the built-in ribs 78 are inserted into the receiving portion 214 of the casting shell 210 of the open end plate 22.

[0110] Figure 39 A flowchart is shown of the process of manufacturing the filter element 10 using casting shells 200 and 210.

[0111] In step S100, a support tube 70 is provided, on which a filter bellows 12 with or without cutouts 40, 44 is arranged, and the support tube has inwardly pointing axial ribs 78. The support tube 70 has an open end and an axially opposed closed end, in which a mandrel 60 extends into the internal space of the support tube 70. The end of the support tube 70 is closed by a disc 74.

[0112] In step S102, casting shells 200 and 210 are provided for opening the end plate 22 and closing the end plate 32.

[0113] In step S104, the initial material of the end plate 22, particularly liquid polyurethane, is poured into the casting shell 210.

[0114] In step S106, the support tube 70 is placed into the casting shell 210 using its surrounding edge 80, into the still liquid initial material of the end plate 22 for opening, wherein the inwardly pointing ribs 78 are inserted into the opening 214 of the sleeve 216. The protrusion 218 is embedded in an orifice on the edge 80 of the support tube 70. The liquid initial material foams and surrounds the edge 80 of the support tube 70 and the attachment of the filter bellows 12. After the material reaction is complete, the support tube 70 with the filter bellows 12 and the opened end plate 22 is removed from the casting shell 210.

[0115] In step S108, the initial material of the end plate 32, particularly liquid polyurethane, is poured into the casting shell 200.

[0116] In step S110, the support tube 70 with the filter bellows 12 is placed into the casting shell 200 into the still liquid initial material of the end plate 32 for closure, and is correctly positioned on the mandrel profile 203 by the T-shaped mandrel 60. Here, the cut structure 202 of the casting shell 200 is embedded between the two folds of the filter bellows 12 and the folds are opened.

[0117] The initial liquid material foams and covers the closed side of the support tube 70, and surrounds the attachments of the filter bellows 12. Here, a spacer bulge 34 is constructed in the recess 206 on the closed end plate 32. The cutout 40 is also fixed in the filter bellows 12. After the material reaction is complete, the support tube 70 with the filter bellows 12 and the closed end plate 32 is removed from the casting shell 210.

[0118] Figures 38 to 50 An embodiment of a filtration system 100 according to an embodiment of the present invention is shown, which has as previously described... Figures 29 to 33 The filter element 10 is as described in the text.

[0119] Figure 38An exploded view of a filtration system 100 according to an embodiment of the present invention is shown, which has according to Figure 29 The filter element 10 is installed in a housing 102 having a housing component 104, which is closed by a cover 130.

[0120] Figure 39 A longitudinal section through the filtration system 100 is shown, and Figure 40 A longitudinal section showing details through the filtration system 100, which has mounting aids in the area of ​​the closed end disc 32 of the filter element 10, is shown. Figure 41 A perspective view of a filtration system 100 with an open housing 102 and an installed filter element 10 is shown. Figure 42 The same view of the housing without filter element 10 is shown. Figure 43 A top view shows a cross-section through the filtration system 100 with the installed filter element 100 and identifiable mounting accessories.

[0121] Figure 44 and 45 A three-dimensional view of the open housing 102 of the filtration system 100 is shown. Figure 46 The following is shown when it is introduced into the housing 102 of the filtration system 100. Figure 29 Filter element 10. Figure 47 and 48 The cover 130 is shown in detail. Figure 49 and 50 Details of the area of ​​the cover 130 on the housing component 104 are shown in longitudinal section.

[0122] The housing 102 has a first housing component 104, such as a housing pot, and a second housing component in the form of a lid 130. A circumferential flange 109 is formed at the open end of the housing component 104, which interacts with a sealing element 137. Figure 49 , 50 ( ) work together.

[0123] The housing 102 has an inlet 110 and an outlet 112. The inlet 110 is disposed on the first housing member 104 directly adjacent to the outlet 112, for example, tangentially disposed thereon.

[0124] The inlet 110 and outlet 112 of the housing 102 are arranged closely adjacent to each other and are disposed on the same housing component 104. The fluid to be filtered undergoes a directional deflection between the inlet 110 and the outlet 112, particularly a deflection of 180º.

[0125] As in Figure 41 and 42As can be seen, the second housing component 104 of housing 102, with the filter element 10 installed, has a valve 128 below the filter element 10 for discharging water from housing 102. The valve 128 extends into the interior space of housing 102. Also visible are inlet 110 and outlet 112, which are arranged directly adjacent to each other on the same housing component 104.

[0126] Adjacent to flange 109, a shoulder 107 is provided on the inner side of housing member 104, extending between the openings on the housing side for inlet 110 and outlet 112. Shoulder 107 forms a sealing surface for seal 144 between cover and housing member 104. Figure 49 , 50 ).

[0127] The first housing component 104 has a spindle 116 at its bottom corresponding to the spindle 60. The corresponding spindle 116 has a locking element 118 on its contact surface with the spindle 60 of the filter element 10, which works in conjunction with a locking element 62 on the inner side of the hollow spindle 60. This protects the filter element 10 from tilting when it is inserted into the housing component 104. If the cover 130 is connected to the housing component 104, the spindle 60 separates from the corresponding spindle 116.

[0128] If the filter element 10 is moved into the first housing component 104, then the corresponding spindle 116 captures the spindle 60 of the filter element 10, so that the filter element 10 can be moved to its end position in the correct position.

[0129] Subsequently, the cover 130 is fixed to the first housing component 104. With the filter element 10 installed, the longitudinal axis L at the center of the filter element 10 coincides with the longitudinal axis at the center of the second housing component 104.

[0130] If the internal space 50 of the filter element 10 is the clean side of the filter element 10, then the cover 130 is arranged on the clean side of the housing 102. In the internal region, the cover 130 has a clean fluid passage 134 that guides the fluid to be filtered, such as clean air, to the outlet 122. For this purpose, a sleeve 142 is arranged on the first housing member 104, which provides the outlet 112. The sleeve 142 extends axially from the end disc 22 of the mounted filter element 10.

[0131] The cover 130 has an opening 132 located below the sleeve 142 of the first housing component 104 in the closed cover 130.

[0132] The raised portion 28 on the open end plate 22 of the filter element 10 abuts against the corresponding receiving portion of the cover 130 and is radially sealed relative to the initial side of the filter element 10 by the sealing member 25 of the protrusion 23. The raised portion 28 serves to support the filter element 10.

[0133] Since only a portion of the open end plate 22 has a raised portion 28, the area around the opening 24 without a raised portion opens toward the outlet 112, and the filtered fluid can flow through the cover 130 toward the outlet 112.

[0134] The first housing component 104 further has a mandrel 116 corresponding to the mandrel 60, as shown in Figure 44 and 45 As can be seen in the image. The corresponding spindle 116 has a locking element 118 on the contact surface with the spindle 60 of the filter element 10, which works in conjunction with a locking element 62 on the inner side of the hollow spindle 60. The spindle 60 presets the position angle of the filter element 10 and prevents the filter element 10 from tilting when it is inserted into the housing component 104.

[0135] If the filter element 10 is moved into the first housing component 104, such as in Figure 46 As shown, the corresponding spindle 116 captures the spindle 60 of the filter element 10, allowing the filter element 10 to be moved to its end position. Meanwhile, the protrusion 36 on the closed end disc 32 provides that the filter bellows 12 can slide above the valve 128 at a safe distance.

[0136] Figure 47 An isometric view of the outer side of cover 130 is shown, and Figure 48 An internal view of the cover 130 is shown. The cover 130 is wedge-shaped when viewed from the side, such that its edge 136 rises from a region with a small height to an opposing region with a large height. An opening 132 is arranged in the region with the large height, opening to release a pure fluid passage 134 into the internal region of the cover 130.

[0137] Opening 132 is positioned below sleeve 142 within closed cover 130. Air guide 134 is constructed within cover 130. Purified fluid passage 134 guides filtered air from the internal space 50 of filter element 10 to outlet 112 of housing 102. Purified fluid passage 134 here has two areas within opening 132, which, in the installed state, communicate with outlet 112 in the side wall of housing component 104.

[0138] The cover 130 has a circumferential sealing groove 141 that opens a first sealing plane. A further circumferential sealing groove 140 is arranged radially inside the sealing groove 141, opening a second sealing plane. The opening 132 of the cover 130 is located between the two sealing planes. Therefore, a separate seal for the opening 132 can be eliminated.

[0139] As in Figure 49 and 50 As can be seen in detail in the view, a surrounding seal 144 is accommodated in the sealing groove 140, which is arranged between the cover 130 and the housing component 104, and serves to seal between the initial side and the clean side. A surrounding seal 137 is accommodated in the sealing groove 141 for sealing the clean side relative to the outer area of ​​the filtration system 100.

[0140] The opened end plate 22 has a radial protrusion 23. Figure 30 , 31 ), which acts as a radial seal 25 to seal the sealing area of ​​the cover 130.

[0141] The sealing grooves 140 and 141 surround the flange 139, and their inner surfaces are formed as sealing surfaces for the radial seal 25 of the end disc 22 for opening.

[0142] In the closed cover 130, the raised portion 28 is embedded in the receiving portion 138 of the cover 130, the receiving portion extending within the flange 139. This is in Figure 49 and 50 As can be seen in the detailed view, the cover 130 is connected to the housing component 104. The receiving portion 138 can cause axial compression of the filter element 10 in the housing 102.

[0143] The cover 130 extends into the opening 24 of the end plate 22 in the area of ​​the housing 102 near the valve 128 using ribs 148. The valve 128 is arranged below the filter element 10. The ribs 148 prevent water from accumulating in the clean area and guide water back into the filter element 10, where it can flow out through the valve 128.

[0144] Figures 51 to 57 Another embodiment of the filtration system 100 according to another embodiment of the present invention is shown.

[0145] Here, Figure 51 The exploded view shows a filtration system 100 having a housing 102, the housing having a first housing component 104, such as a housing pot, and a second housing component (in the form of a lid 130 and an integral seal 150 for sealing the pure side relative to the initial side and toward the external area of ​​the filtration system 100). Figure 52 It shows according to Figure 51An exploded view of the integrated seal 150 and cover 130 of the filtration system 100, and Figure 53 A perspective view of the assembly of cover 130 and seal 150 is shown. Figure 54 A side view of the filtration system 100 is shown, and Figure 55 A longitudinal section through the filtration system 100 is shown. Figure 56 A detailed cross-section of the pure fluid inlet through the cover 130 of the filtration system 100 is shown, and Figure 57 A detailed cross-section of the initial fluid side through the cover 130 of the filtration system 100 is shown.

[0146] Further components and details of the filtration system 100 and the filter element 10 are described in the previous embodiments, particularly in... Figures 29 to 46 The embodiments described herein are used to avoid unnecessary repetition.

[0147] The filter element 10 has at least one axially limited cutout 44 in its filter bellows 12, preferably on the side of its closed end disc 32. The filter element 10 is introduced into the first housing component 104 by moving forward using the closed end disc 32, wherein the filter element can be moved onto the protrusion 36 via a valve 128 located below the filter element 10 in the first housing component 104. The closed end disc 32 has a central, inwardly pointing spindle 60 that moves onto a spindle 116 in the first housing component 104.

[0148] The open end plate 22 of the filter element 10 has a raised portion 28 that partially surrounds the opening 24 of the end plate 22. In the area of ​​the opening 24 without the raised portion, fluid can flow from the internal space 50 of the filter element 10 through the pure fluid passage 134 of the cover 130 to the outlet 112. The inlet 110 and the outlet 112 are arranged directly adjacent to each other in the same housing component 104.

[0149] The cover 130 has a wedge-shaped edge 136, in which an opening 132 is arranged at its maximum height. The opening is positioned in the closed cover 130 below the sleeve 142 of the first housing component 104. The sleeve 142 extends axially from the end disc 22 of the mounted filter element 10.

[0150] The cover 130 has a receiving portion 138 for the raised portion 28. The cutout 44, the spindle 60 and the raised portion 28 secure the filter element 10 to prevent tilting in the housing 102, which is advantageous when the filter element 10 is installed flat.

[0151] The integral seal 150 has a first sealing ring 152 and opposing curved sealing rings 154 connected to it on both sides by wings 156. The first sealing ring 152 abuts against a sealing surface 146 on the outer edge of the inner side of the cover 130, wherein the sealing surface 146 surrounds the flange 139 as much as possible, and the inner side of the flange serves as a sealing surface for the radial seal 25 for the end disc 22. A groove 149 receiving the outer edge of the sealing ring 152 is adjacent to the sealing surface 146.

[0152] The second sealing ring 154 rests against the sealing surface 147, which surrounds the opening 132 in the edge 136 of the cover 130. The seal 150 rests against the two transition portions between the two sealing surfaces 146 and 147 using the wings 156.

[0153] Advantageously, the sleeve 142 surrounding the outlet 112 between the initial side and the clean side, and the seal surrounding the cover 130 relative to the environment, are integrated into an integral seal 150.

[0154] In addition, the cover 130 has ribs 148 above the receiving portion 138 for the raised portion 28 that extend into the opening 24 of the housing 102 and the open end plate 22. The ribs are used to block water from the clean passage 134 of the cover 130 and to guide water to the valve 128 through the filter element 10.

[0155] As in Figure 55 The cross section (which shows) Figure 54 (in the shell) and from Figure 56 In the pure fluid side of the filtration system 100 and Figure 57 As can be seen in the detailed view of the initial fluid side of the filtration system 100, the seal 150 provides a seal between the cover 130 and the outer region of the cover 130 and the initial fluid side. A first sealing ring 152 achieves a seal between the pure fluid side and the initial fluid side. A second sealing ring 154 achieves a seal between the outer region and the filtration system 100.

[0156] The first sealing ring 152 has an approximately Z-shaped profile, wherein at each end of the intermediate support, a support protrudes from the intermediate support in opposite directions. The second sealing ring 154 has an approximately T-shaped profile.

[0157] The first sealing ring 152 rests against the groove 149 with a protruding foot, rests against the inner side of the surrounding flange 109 of the housing component 104 with a middle foot, and rests against the outer side of the flange 139 with another protruding foot at the end.

[0158] The filter element 10, especially when installed horizontally, can be reliably installed and removed using the filter element 10 and filter system 100 according to the invention. Correct positioning can be achieved through one or more cuts 40, 44 on the element, i.e., the filter bellows 12, the spindle 60, and, if necessary, the raised portion 28, and the filter element 10 is protected from tilting during horizontal installation.

[0159] It should be understood that the design scheme described so far in the accompanying drawings is not limited to a circular cross-section of the filter element 10. Instead, the cross-section of the filter element 10 can be selected according to requirements, such as a circle, an ellipse, a quadrilateral, etc.

Claims

1. A filter element (10) for a filtration system (100) for filtering fluid, the filter element having a longitudinal axis (L) and a filter bellows (12) arranged around the longitudinal axis (L), the filter bellows surrounding an interior space (50), and the filter element having at least one end (30) a closed end disc (32) that closes the interior space (50) at that end (30), and the filter element having an end disc (22) at an opposite end (20) with an opening (24) leading to the interior space (50), wherein the closed end disc (32) has a hollow first mandrel (60) extending into the interior space (50) along the longitudinal axis (L), wherein, The first spindle (60) has a first locking element (62) on its inner side facing away from the internal space (50). The first locking element is configured to cooperate with a corresponding second locking element (118) of the housing component (104) of the housing (102) when it is installed in the housing (102). The closed end plate (32) has a first cut that is configured to form a friction fit with a second cut (122) on the housing side.

2. The filter element according to claim 1, wherein, The first mandrel (60) has a cross-section in which the first locking element (62) can be arranged in a defined angular position relative to the longitudinal axis (L).

3. The filter element according to claim 2, wherein, The first mandrel (60) has a cross-section that is different from that of a circle.

4. The filter element according to any one of claims 1 to 3, wherein, The first spindle (60) extends into the internal space (50) along the longitudinal axis (L) and has a length greater than 20% of the total length of the filter element and a length less than 50% of the total length of the filter element.

5. The filter element according to any one of claims 1 to 3, wherein, The filter bellows (12) has a first cut (44) that is partially confined along the longitudinal axis (L).

6. The filter element according to claim 5, wherein, The first cut (44) is arranged in a defined angular relationship with the first locking element (62).

7. The filter element according to claim 5, wherein, The first incision (44) originates from the closed end plate (32).

8. The filter element according to any one of claims 1 to 3, wherein, On the closed end plate (32), two peripherally spaced protrusions (36) protrude radially.

9. The filter element according to any one of claims 1 to 3, wherein, The end plate (22) having an opening (24) leading to the interior space (50) has a raised portion (28) that partially surrounds the opening (24) and protrudes outward along the longitudinal axis (L).

10. The filter element according to claim 1, wherein, The filter element (10) is configured to filter gaseous fluid.

11. The filter element according to claim 1, wherein, The filter element (10) is configured to filter air.

12. The filter element according to claim 2, wherein, The first mandrel (60) has a cross-section in which the first locking element (62) can be arranged in a defined angular position relative to the longitudinal axis (L).

13. The filter element according to claim 3, wherein, The first mandrel (60) has a T-shaped, elliptical, or polygonal cross-section.

14. The filter element according to claim 4, wherein, The first spindle (60) extends into the internal space (50) along the longitudinal axis (L) and has a length greater than 25% of the total length of the filter element.

15. The filter element according to claim 6, wherein, The first cut (44) is arranged in a defined angular relationship with the first locking element (62).

16. The filter element according to claim 7, wherein, The closed end plate (32) is cut in the first cut (44) in the filter bellows (12).

17. A filtration system (100) for filtering a gaseous fluid, the filtration system having a filter element (10) for the filtration system (100) according to any one of claims 1 to 16, wherein the housing includes a removable cover (130) and a housing component (104) that can be closed by the cover (130), wherein the cover (130) is connectable to the filter element (10), wherein the filter element (10) surrounds an internal space (50) by means of its filter bellows (12), and has at its end (30) a filter element (104) that is connected to the filter element (10). The end plate (32) at the end (30) closes the internal space (50) and the opposite end plate (22) at the opposite end (20) has an opening (24) leading to the internal space (50), wherein the closed end plate (32) has a hollow first spindle (60) extending into the internal space (50) along the longitudinal axis (L), and the housing component has a corresponding second spindle (116) on which the hollow first spindle (60) can move to the corresponding second spindle (116).

18. The filtration system according to claim 17, wherein, The first spindle (60) has a first locking element (62) on its inner side, which is capable of locking with a second locking element (118) of a corresponding second spindle (116) in the housing component (104).

19. The filtration system according to claim 17 or 18, wherein, The second spindle (116) has a length greater than 20% of the total length of the filter element and a length less than 50% of the total length of the filter element along the longitudinal axis (L).

20. The filtration system according to claim 17 or 18, wherein, The housing component (104) has a first receiving portion (126) for radially protruding protrusions (36) spaced apart on the periphery of the closed end disc (32).

21. The filtration system according to claim 17 or 18, wherein, The housing component (104) has a second cut (122) that corresponds to a first cut (44) on the filter bellows (12) and / or on the closed end disc (32) of the filter element (10).

22. The filtration system according to claim 21, wherein, The second cut (122) on the housing side forms a friction fit with the first cut (44) and / or the cut closed end disc (32).

23. The filtration system according to claim 17 or 18, wherein, The cover (130) has a second receiving portion (138) corresponding to a raised portion (28), wherein the raised portion (28) is arranged on an end plate (22) having an opening (24) leading to an interior space (50) and at least partially surrounds the opening (24), and wherein the raised portion (28) is capable of being received in the second receiving portion (138).

24. The filtration system according to claim 23, wherein, The raised portion (28) is configured as a sealing raised portion, and the second receiving portion (138) is configured as a sealing receiving portion.

25. The filtration system according to claim 17, wherein, The filtration system (100) is configured to filter air.

26. The filtration system according to claim 17, wherein, The filtration system (100) is configured to filter the intake air of the internal combustion engine.

27. The filtration system according to claim 17, wherein, The cover (130) can be sealed to the filter element (10).

28. The filtration system according to claim 19, wherein, The second mandrel (116) has a length greater than 25% of the total length of the filter element along the longitudinal axis (L).

29. A method for installing a filtration system according to any one of claims 17 to 28, wherein, The filter element according to any one of claims 1 to 16 moves into the housing component (104) when the cover (130) is removed, and moves forward into the housing component (104) substantially horizontally along its longitudinal axis (L) using the closed end disc (32), thereby moving the hollow first spindle (60) of the closed end disc (32) onto the second spindle (116) of the housing component corresponding to the hollow first spindle.

30. The method according to claim 29, wherein, After the filter element is moved into the housing component (104), the cover (130) is mounted onto the housing component (104) to achieve a sealed fluid connection between the cover (130) and the filter element.

31. The method according to claim 29, wherein, The filter element according to any one of claims 1 to 16 is moved into the housing component (104) when the cover (130) is removed, and is moved forward into the housing component (104) substantially horizontally along its longitudinal axis (L) by means of the closed end disc (32), such that the hollow first spindle (60) of the closed end disc (32) is moved onto the second spindle (116) of the housing component corresponding to the hollow first spindle in such a way as to be placed on the housing component.

32. The method according to claim 30, wherein, After the filter element is moved into the housing component (104), the cover (130) is mounted onto the housing component (104) to achieve a sealed fluid connection between the pure fluid passage arranged in the cover and the internal space of the filter element, and / or between the cover and the housing.

Images