Abstract
A filter element has a holder arrangement with a filter bellows and a partition element arranged at different regions of the holder arrangement. The partition element extends between first and second chambers of a resonator structure when installed in a filter system and has a passage acoustically coupling the two chambers. Such a filter element is exchangeably arranged in the filter housing of the filter system which has a main inlet, a main outlet, and an auxiliary connection outlet. The filter bellows is arranged in flow direction between the main inlet and the two outlets. The partition element is arranged between the two chambers of the resonator structure for noise damping of the auxiliary connection outlet. Its passage acoustically couples the two chambers. The partition element projects into an auxiliary connection resonator region of the filter housing and has end regions contacting walls delimiting the auxiliary connection resonator region.
Claims
1. A filter element for a filter system, the filter element comprising: a holder arrangement comprising a filter bellows arranged at a first region of the holder arrangement and further comprising a partition element arranged at a second region of the holder arrangement; wherein the partition element is configured to be arranged between a first chamber and a second chamber of a resonator structure of the filter system in an intended state of use of the filter element; wherein the partition element comprises at least one passage, wherein the first and the second chambers are acoustically coupled with each other through the at least one passage in an embodiment of use.
2. The filter element according to claim 1, further comprising a resonator partition, wherein the partition element is arranged at the resonator partition and projects away from the resonator partition.
3. The filter element according to claim 2, wherein the resonator partition comprises an opening, wherein the opening is an inlet into the first chamber of the resonator structure in an embodiment of use.
4. The filter element according to claim 2, wherein the holder arrangement comprises a circumferentially extending frame surrounding the filter bellows and the resonator partition, wherein the circumferentially extending frame comprises a seal element.
5. The filter element according to claim 1, wherein the partition element is spaced apart from the filter bellows.
6. A filter system comprising: a filter housing; a filter element exchangeably arranged in the filter housing, wherein the filter element comprises a holder arrangement comprising a filter bellows arranged at a first region of the holder arrangement and further comprising a partition element arranged at a second region of the holder arrangement; a main inlet; two outlets, including a main outlet and an auxiliary connection outlet, wherein the filter bellows is arranged in a flow direction of a fluid to be filtered between the main inlet and the two outlets; a resonator structure configured for noise damping of the auxiliary connection outlet, wherein the partition element is configured to be arranged between a first chamber of the resonator structure and a second chamber of the resonator structure in an intended state of use of the filter element in the filter housing; wherein the partition element comprises at least one passage, wherein the first and the second chambers are acoustically coupled with each other through the at least one passage in an embodiment of use; wherein the filter housing comprises an auxiliary connection resonator region; wherein the partition element projects into the auxiliary connection resonator region of the filter housing; wherein the partition element comprises end regions, wherein the end regions each contact one or more walls delimiting the auxiliary connection resonator region.
7. The filter system according to claim 6, wherein the partition element and the one or more walls delimiting the auxiliary connection resonator region form together the first chamber and the second chamber of the resonator structure, wherein the first chamber and the second chambers of the resonator structure are outwardly closed and are fluidically coupled with each other.
8. The filter system according to claim 7, wherein the one or more walls delimiting the auxiliary connection resonator region include a resonator partition of the filter element.
9. The filter system according to claim 8, wherein the resonator partition of the filter element comprises an opening, wherein the opening is fluidically coupled to the first chamber of the resonator structure and forms an auxiliary connection inlet.
10. The filter system according to claim 9, wherein the filter housing comprises an opening, wherein the opening of the filter housing is fluidically coupled with the first chamber of the resonator structure and forms the auxiliary connection outlet.
11. The filter system according to claim 6, wherein the auxiliary connection resonator region comprises guide elements configured to guide the partition element.
12. The filter system according to claim 6, wherein the filter housing is comprised of two parts.
13. The filter system according to claim 12, wherein the two parts of the filter housing include a bottom element and a cover element, wherein the bottom element comprises the auxiliary connection resonator region.
14. The filter system according to claim 13, wherein the bottom element comprises the main inlet and the auxiliary connection outlet and wherein the cover element comprises the main outlet.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0037] Further advantages result from the following drawing description. In the drawings, embodiments of the invention are illustrated. The drawings, the description, and the claims contain numerous features in combination. A person of skill in the art will consider the features expediently also individually and combine them to expedient further combinations.
[0038] FIG. 1 shows an isometric view of a filter element according to an embodiment of the invention in a view from below.
[0039] FIG. 2 shows an isometric view of a filter element of FIG. 1 in a view from above.
[0040] FIG. 3 shows an exploded view of a filter system according to an embodiment of the invention with a filter element from FIGS. 1 and 2.
[0041] FIG. 4 shows an isometric view from above of a bottom element of the filter system of FIG. 3.
[0042] FIG. 5 shows an isometric view from below of a cover element of the filter system of FIG. 3.
[0043] FIG. 6 shows a partially sectioned view of the filter system of FIG. 3 in an embodiment of use.
DETAILED DESCRIPTION
[0044] In the Figures, same or same-type components are identified with same reference characters. The Figures show only examples and are not to be understood as limiting.
[0045] Directional terminology used in the following with terms such as left, right, top, bottom, in front of, behind, after, and the like serve only for better understanding of the Figures and do not represent in any case a limitation of the generality. The illustrated components and elements, their configuration and use can vary in the context of considerations of a person of skill in the art and be adapted to the respective applications.
[0046] FIGS. 1 and 2 show an isometric view of a filter element 10 according to an embodiment of the invention as a view from below (FIG. 1) and from above (FIG. 2), respectively.
[0047] The filter element 10 comprises a holder arrangement 14 which comprises a filter bellows 12 at one region and a partition element 26 at another region. In an embodiment of use of the filter element 10 (FIG. 6), the partition element 26 is arranged between two sealed chambers 22, 24 of a resonator structure 20. For example, the resonator structure 20 can be configured for noise damping of an auxiliary connection outlet 106. The partition element 26 comprises at least one passage 25 through which the two chambers 22, 24 are acoustically coupled with each other in an embodiment of use.
[0048] As can be further seen in FIGS. 1 and 2, the partition element 26 in the illustrated embodiment is arranged at a filter element-associated resonator partition 18 and projects away from the resonator partition 18. Furthermore, the filter element 10 in the illustrated embodiment comprises a holder arrangement 14 which comprises a circumferentially extending frame 15 which surrounds the filter bellows 12 and the resonator partition 18 on three sides, respectively, and which comprises a seal element 16. In the illustrated embodiment, the seal element 16 is arranged only in the region of the frame 15 which extends around the resonator partition 18. In an alternative embodiment, the seal element 16 or a further seal element can extend in the region about the filter bellows 12. In the illustrated embodiment, the resonator partition 18 and the filter bellows 12 are connected to the frame 15 at a bottom side of the frame 15. Surfaces of the frame elements extend perpendicularly to the top side and to the bottom side of the filter bellows 12 and perpendicularly to the top side and to the bottom side of the resonator partition 18. Narrow sides of the frame elements each extend parallel to top sides and bottom sides of the filter bellows 12 and of the resonator partition 18. In addition, the filter bellows 12 and the resonator partition 18 comprises a rectangular cross section. Furthermore, a stay 17 extends in the frame 15 and divides the region enclosed by the frame 15 into two partial regions which correspond to the regions for the filter bellows 12 and the resonator partition 18. Furthermore, the dimensions of the partial regions in the illustrated embodiment are designed such that the partial region with the filter bellows 12 is adapted to a cross section of a raw fluid region 32 of the filter housing 110 and the partial region with the resonator partition 18 or with the partition element 26 is adjusted to a cross section of the auxiliary connection resonator region 34. In this way, in an embodiment of use, the raw fluid region 32 is covered by the filter bellows 12 and the auxiliary connection resonator region 34 by the resonator partition 18 in the illustrated embodiment.
[0049] In an embodiment, not illustrated, other shapes and dimensions of the holder arrangement 14 and/or of the frame 15 and/or of the stay 17 and/or of the partition element 26 and/or of the resonator partition 18 and/or of the filter bellows 12 are possible. For example, the cross sections can have other shapes than the illustrated rectangular shapes.
[0050] As can be further seen in FIGS. 1 and 2, the partition element 26 in the illustrated embodiment comprises a comb-like structure 27 with a plurality of passages 25, slot-shaped in this example. The passages 25 comprise dimensions which are adapted to at least one predetermined frequency of the resonator structure 20. The passages 25 of the partition element 26 in the illustrated embodiment are arranged at an end region of the partition element 26 facing away from the resonator partition 18. The passages 25 are open downwardly and are closed only in an embodiment of use (FIG. 6) by a housing wall of the filter housing 110. In an alternative embodiment, not illustrated, the comb-like structure 27 of the partition element 26 can also be arranged at another end region. Furthermore, the passage 25 or the passages 25 can also be introduced into the partition element 26 at other suitable regions of the partition element 26. Furthermore, suitable structures other than the illustrated comb-like structures 27 are possible.
[0051] As can be further seen in FIGS. 1 and 2, the filter element-associated resonator partition 18 comprises an opening which forms an inlet to a first chamber 22 in an embodiment of use (FIG. 6). The opening comprises a round cross section but other suitable shapes, such as angular or oval shapes, are also possible.
[0052] As can be further seen in FIGS. 1 and 2, the partition element 26 is arranged spaced apart from the filter bellows 12. In this way, the partition element 26 or a resonator structure 20 comprising the partition element 26 can be designed independent of the filter bellows 12.
[0053] As can be further seen in FIGS. 3 to 6, the filter system 100 comprises a filter housing 110, an exchangeable filter element 10 illustrated in FIGS. 1 and 2, a main inlet 102, a main outlet 104, an auxiliary connection outlet 106, and a resonator structure 20 for noise damping of the auxiliary connection outlet 106. The filter bellows 12 of the exchangeable filter element 10 is arranged in flow direction between the main inlet 102 and the two outlets 104, 106. The partition element 26 of the filter element 10 projects into the auxiliary connection resonator region 34 in the filter housing 110. The end regions of the partition element 26 each contact at least one wall 38 delimiting the auxiliary connection resonator region 34.
[0054] As can be further seen in FIG. 6, the interior space enclosed by the filter housing 110 is divided into three regions: The raw fluid region 32 which adjoins the main inlet 102 and the filter bellows 12; a clean fluid region 42 which adjoins a side of the filter bellows 12 facing away from the raw fluid region 32 and which is thereby arranged in flow direction of the fluid downstream of the filter bellows 12; and the auxiliary connection resonator region 34 which adjoins the clean fluid region 42. The clean fluid region 42 is coupled with the main outlet 104, the auxiliary connection resonator region 34 is coupled with the auxiliary connection outlet 106. The regions are enclosed by walls such that the fluid can flow only through the filter bellows 12 from the raw fluid region 32 into the clean fluid region 42. Furthermore, there is no possibility for the fluid to flow directly from the raw fluid region 32 into the auxiliary connection resonator region 34. In the clean fluid region 42, the fluid can flow through the main outlet 104 out of the filter housing 110. In addition, the fluid can flow out of the clean fluid region 42 into the auxiliary connection resonator region 34 and from there through the auxiliary connection outlet 106 out of the filter housing 110.
[0055] As can be further seen in FIGS. 3 to 6, the filter housing 110 in the illustrated embodiment is of a two-part configuration. A bottom element 30 comprises the auxiliary connection resonator region 34. In this context, walls 38 of the bottom element 30 enclose the auxiliary connection resonator region 34 at least partially. The walls 38 are embodied as sidewalls and as bottom. The ceiling which covers the auxiliary connection resonator region 34 is formed by the resonator partition 18 of the filter element 10. The partition element 26 of the filter element 10 divides the auxiliary connection resonator region 34 into the two chambers 22, 24. In this way, by means of the partition element 26 and of the at least one wall 38 delimiting the auxiliary connection resonator region 34 and the resonator partition 18, two outwardly closed chambers 22, 24 which are acoustically coupled with each other are formed in the auxiliary connection resonator region 34. Through the passages 25 of the partition element 26, the two chambers 22, 24 are acoustically coupled with each other. The opening 28 of the filter element-associated resonator partition 18 is fluidically coupled with a first chamber 22 and fluidically couples the first chamber 22 with the clean fluid region 42. Furthermore, the opening 28 forms an auxiliary connection inlet 108. The auxiliary connection inlet 108 is arranged in this way in the clean fluid region 42 in the filter housing 110. The filter housing 110 comprises in addition an opening which is fluidically coupled with the first chamber 22 and which forms the auxiliary connection outlet 106. In this way, the filtered fluid can flow through the first chamber 22 of the resonator structure 20 in order to reach a further consumer. The further consumer can be a compressor in a brake system of a truck. Upon flow through the first chamber 22, disturbing noises can be dampened due to the interaction with the second chamber 24.
[0056] As can be further seen in FIGS. 3 and 4, the bottom element 30 comprises the main inlet 102 and the auxiliary connection outlet 106. Furthermore, the auxiliary connection resonator region 34 comprises guide elements 36 which guide the partition element 26. Guiding the partition element 26 can take place when the filter element 10 is exchanged and the filter element 10 is removed from the filter housing 110 for this purpose, or when a new filter element 10 is arranged in the filter housing 110. The guide elements 36 in the illustrated embodiment are configured as a groove and extend at oppositely positioned side wall regions and at the bottom. In an embodiment, not illustrated, a seal element is arranged in the guide element 36.
[0057] As can be further seen in FIGS. 3, 5, and 6, a cover element 40 of the filter housing 110 comprises the main outlet 104.
[0058] As can be further seen in FIG. 5, the cover element 40 comprises a receiving region 44 at an end region facing the bottom element 30. The receiving region 44 is embodied as a flute or as a groove and is arranged, circumferentially extending, at the cover element 40. The receiving region 44 is arranged so as to be positioned opposite to the frame 15 and to the stay 17 of the holder arrangement 14. In an embodiment of use, the receiving region 44 receives the frame 15 and the stay 17 of the holder arrangement 14 as well as the seal element 16 and a circumferentially extending rim of the bottom element 30. In this way, the regions in the interior space of the housing 110 can be reliably delimited. In addition, the housing parts 30, 40 comprise connection elements 114, 112 in order to be connected to each other in an embodiment of use.
[0059] As can be further seen in FIGS. 3 and 6, the resonator partition 18 contacts with a bottom side an intermediate wall 39 which separates with an upper region the raw fluid region 32 from the auxiliary connection resonator region 34 and forms with a lower region an outer wall. In addition, the resonator partition 18 and/or the frame elements surrounding the resonator partition 18 contact an inner edge of the bottom element 30.
[0060] In an alternative embodiment, not illustrated, the filter housing 110 can also be formed of only one filter housing part 30, 40 or of more than two filter housing parts 30, 40.
REFERENCE CHARACTERS
[0061] 10 filter element [0062] 12 filter bellows [0063] 14 holder arrangement [0064] 15 frame [0065] 16 seal element [0066] 17 stay [0067] 18 filter element-associated resonator partition [0068] 20 resonator structure [0069] 22 chamber [0070] 24 chamber [0071] 25 passage [0072] 26 partition element [0073] 27 comb-like structure [0074] 28 opening [0075] 30 bottom element/filter housing part [0076] 32 raw fluid region [0077] 34 auxiliary connection resonator region [0078] 36 guide element [0079] 38 bottom element-associated resonator partition/delimiting wall [0080] 39 intermediate wall [0081] 40 cover element/filter housing part [0082] 42 clean fluid region [0083] 44 receiving region [0084] 100 filter system [0085] 102 main inlet [0086] 104 main outlet [0087] 106 auxiliary connection outlet [0088] 108 auxiliary connection inlet [0089] 110 filter housing [0090] 112 connection element [0091] 114 connection element
