Search

KR-20260066059-A - A filter element having two filter media bodies arranged overlapping each other

KR20260066059AKR 20260066059 AKR20260066059 AKR 20260066059AKR-20260066059-A

Abstract

The present invention relates to a two-stage filter element comprising an inner filter media body and an outer filter media body, configured such that fluid can pass through them in series. The inner filter media body is disposed in the internal space of the outer filter media body. At least one of the filter media bodies comprises a corrugated filter media, preferably comprising activated carbon, and the corrugated filter media is covered by a side band at the end surface. The side band is embedded in an end disk in at least one radial portion so as to be continuous in the circumferential direction, and the end disk seals another filter media body at the end surface. The end disk may also seal the corrugated filter media body including the side band, in which case the side band may be completely embedded in the end disk. Additionally, the side band may have a slit in the area embedded in the end disk.

Inventors

  • 네프, 파스칼
  • 게르라흐, 슈테펜
  • 쿠퍼, 프리드리히
  • 헤트캄프, 필립
  • 그라트, 요하네스
  • 페레이라 마데이라, 페드로 미구엘
  • 바이스, 디이터
  • 브렌나이스, 프릿츠
  • 쥐스, 라인하르트
  • 크리거, 요아힘-파울
  • 게볼프, 클라우스
  • 비트머스, 크리스토프
  • 베버, 안드레아스
  • 슈타크, 데니스
  • 리거, 마리오
  • 한젤만, 마르쿠스
  • 페크니, 페터
  • 할바우어, 에파
  • 슈미트, 다니엘

Assignees

  • 만 운트 훔멜 게엠베하

Dates

Publication Date
20260512
Application Date
20240813
Priority Date
20230907

Claims (19)

  1. A filter element (10; 42; 60) having first and second annular filter media bodies (12, 14), particularly as a gas filter element, One of the filter media bodies (12, 14) is placed inside another filter media body (12, 14), and the two filter media bodies (12, 14) are configured to allow flow to pass through sequentially. The above filter element (10; 42; 60) is provided with an end disk (28) on the end surface (24), and At least the second filter media body (14) is provided with a pleated filter media (18), and The end edge (34) of the corrugated filter medium (18) of the second filter medium body (14) is sealed by a side band (32) at the end surface (24), and A filter element (10; 42; 60) characterized in that the side band (32) is at least partially embedded within the end disk (28).
  2. In paragraph 1, The above-mentioned side band (32) is characterized by protruding radially beyond the corrugated filter medium (18) of the second filter medium body (14), in a filter element (10).
  3. In paragraph 1 or 2, A filter element (10) characterized in that only the radial portion of the above-mentioned side band (32) is embedded within the end disk (28).
  4. In paragraph 1 or 2, The above-mentioned side band (32) is a filter element (42; 60) characterized by being completely embedded within the end disk (28).
  5. In any one of the preceding clauses, A filter element (42) characterized in that a second filter medium body (14) having a side band (32) is disposed within the radial interior of a first filter medium body (12).
  6. In any one of the preceding clauses, A filter element (10; 60) characterized in that a second filter media body (14) having a side band (32) is arranged to surround a first filter media body (12) from the outside.
  7. In any one of the preceding clauses, The above-mentioned side band (32) is a filter element (10; 42; 60) characterized by comprising a nonwoven material, particularly a filter nonwoven, a fabric, particularly a filter fabric, or a grid material, particularly a filter grid.
  8. In any one of the preceding clauses, A filter element (10; 42; 60) characterized in that the second filter medium body (14) comprises at least one corrugated filter bellows (64, 66), the head surface (68) of the filter bellows (64, 66) is sealed by a head band (70), and the annular shape of the second filter medium body (14) is formed by bonding two head bands (70) together.
  9. In paragraph 8, A filter element (10; 42; 60) characterized in that the second filter medium body (14) is formed from at least two filter bellows (64, 66), and the filter bellows (64, 66) adjacent to each other in the circumferential direction are adhesively bonded to each other at each head band (70).
  10. In any one of the preceding clauses, The filter element (60) is characterized by being formed to gradually taper in the axial direction.
  11. In any one of the preceding clauses, A filter element (60) characterized in that the above-mentioned side band (32) has a slit (72), and the slit (72) extends into the fold (79) of the second filter medium body (14).
  12. In Paragraph 11, A filter element (60) characterized by having at least five consecutively arranged folds (79) open to the common perimeter side of the second filter medium body (14), preferably over the entire perimeter, with each slit (72) extending into each open fold (79) open to the common perimeter side of the part area.
  13. In any one of the preceding clauses, The filter element (10; 42; 60) is characterized by having a second end disk (36) on a second end surface (26), and the end edge (40) of the second filter medium body (14) on the second end surface (26) is sealed by a second side band (38), and the second side band (38) is at least partially embedded within the second end disk (36).
  14. In Paragraph 13 and Paragraph 11 or 12, A filter element (60) characterized in that the second side band (38) has a slit (74), the slit (74) extends into the fold (81) of the second filter medium body (14), the slit (74) extends from the inner edge (78) of the second side band (38), and the slit (72) formed in the other side band (32) extends from the outer edge (76) of the other side band (32).
  15. In any one of the preceding clauses, A filter element (10; 42; 60) characterized in that the pleated filter medium (18) of the second filter medium body (14) comprises activated carbon.
  16. In any one of the preceding clauses, A filter element (10; 42; 60) characterized by having a car shearing nonwoven fabric (46) disposed on the perimeter surface (44; 62) of a second filter media body (14) spaced apart from a first filter media body (12).
  17. In any one of the preceding clauses, A filter element (42; 60) characterized in that a support (48) is disposed on the perimeter surface (44; 62) of a second filter medium body (14) spaced apart from a first filter medium body (12).
  18. Use of a filter element (10; 42; 60) according to any one of claims 1 to 17 as a cathode air filter of a fuel cell (86).
  19. A fuel cell (86) comprising an anode (88) and a cathode (90), wherein an electrolyte (92) is disposed between the anode (88) and the cathode (90), and comprising a filter element (10, 42, 60) according to any one of claims 1 to 17, wherein air can be guided to the cathode (90) through the filter element.

Description

A filter element having two filter media bodies arranged overlapping each other This patent application claims priority to German patent application No. 102023124179.6 filed with the German Patent and Trademark Office (DPMA) on September 7, 2023, the entire contents of which are incorporated herein by reference. The present invention relates to a filter element having first and second annular filter media bodies, wherein one of the filter media bodies is disposed inside another filter media body, and the two filter media bodies can sequentially flow through each other by a fluid, wherein the filter element has an end disk on one end surface, and at least the second filter media body comprises a corrugated filter media. Such filter elements are disclosed in WO 2015/092681 A1. In various applications, it may be necessary to sequentially guide a fluid to be filtered, in this case particularly a gas, through two different filter media to remove all impeding components present in the fluid. For a space-saving configuration, two annular filter media bodies may be used, wherein one of the filter media bodies is placed inside the other filter media body. Adsorbent filter media are known for capturing harmful gases. For example, the filter media may contain activated carbon. Such filter media may specifically contain activated carbon particles enclosed between two layers of filter paper. For instance, during the processing of such filter media, there is a risk that activated carbon particles may leak out from the open edges of the filter media. Furthermore, even when using such filter media, care must be taken to prevent activated carbon particles from entering the purification side. Moreover, these filter media have relatively low inherent rigidity, which presents a problem that makes handling difficult during manufacturing and assembly. In order to sequentially allow flow through two filter media bodies, the filter media bodies must be sealed in an appropriate manner between each other or against the filter housing. WO 2015/092681 A1, previously mentioned, discloses a filter element having a cylindrical shape and two layers of filter material made of folded paper. The two layers of filter material are inseparably joined to each other by being partially embedded within a seal made of plastic material. This seal may be disposed in the form of end discs on both end surfaces of the filter element. Further features and advantages of the present invention will become apparent from the detailed description of the embodiments of the present invention, the claims, and the drawings illustrating specific details of the present invention described below. Features mentioned above or further described below may be implemented in variations of the present invention, either individually or in any suitable combination of two or more. Features illustrated in the drawings are depicted so that the characteristic details of the present invention can be clearly recognized. The following are illustrated in the drawings: FIG. 1 illustrates a first embodiment of a filter element according to the present invention, comprising first and second filter media bodies, in a schematic cross-sectional view; FIG. 2 illustrates an enlarged partial view of the first end surface area of FIG. 1; FIG. 3 illustrates an enlarged partial view of the second end surface area of FIG. 1; FIG. 4 illustrates a second embodiment of a filter element according to the present invention, comprising first and second filter media bodies, in a schematic cross-sectional view; FIG. 5 illustrates an enlarged partial view of the first end surface area of FIG. 4; FIG. 6 illustrates an enlarged partial view of the second end surface area of FIG. 4; FIG. 7 illustrates a filter device having the filter element of FIG. 4 in a schematic cross-sectional view; FIG. 8 illustrates a third embodiment of a filter element according to the present invention, comprising first and second filter media bodies, in a schematic cross-sectional view; FIG. 9 illustrates another schematic cross-sectional view of the filter element of FIG. 8, viewed from a direction perpendicular to the cross-sectional plane of FIG. 8; FIG. 10 is a schematic perspective view of the second filter medium body of the filter element of FIG. 8, viewed from an oblique upward angle; FIG. 11 illustrates a schematic view of the second filter medium body of FIG. 10 seen from the bottom; FIG. 12 illustrates a schematic diagram of a structure covering the end edge of a second filter medium body by a side band having a slit formed therein; FIG. 13 is illustrated as a schematic cross-sectional view showing a filter device having the filter element of FIG. 8; FIG. 14 illustrates a schematic cross-sectional view of a pleated filter medium containing activated carbon; FIG. 15 illustrates a schematic diagram of a fuel cell according to the present invention using a filter element according to the present invention as a cathode air f