Filter element and dirt suction device with filter receptacle for such a filter element

Abstract

A filter element for a dirt suction device is provided, with a filter frame, on which a filter medium is attached, wherein on the filter frame, a continuous seal is arranged, the inner circumferential surface of which is arranged on an outer circumferential surface of the filter frame and has a section that radially protrudes over the filter frame, wherein a groove is arranged on a front side of the protruding section of the seal, and that a sealing surface is arranged on the opposite front side of the protruding section of the seal.

Claims

1. A filter element (1) for a dirt suction device comprising: a filter frame (2), a filter medium (3) attached to the filter frame (2), a continuous seal (4) arranged on the filter frame (2), the continuous seal (4) having an inner circumferential surface arranged on an outer circumferential surface of the filter frame (2) and a protruding section (4a) that radially protrudes over the filter frame (2), a groove (8) arranged on a front side of the protruding section (4a) of the seal (4), and a sealing surface (6) arranged on an opposite front side of the protruding section (4a) of the seal (4).

2. The filter element according to claim 1, wherein the sealing surface (6) of the seal (4) is profiled and has at least one continuous rib (7) which protrudes from the sealing surface (6).

3. The filter element according to claim 1, the sealing surface (6) of the seal (4) is profiled and has at least one continuous groove defined in the sealing surface (6).

4. The filter element according to claim 2, wherein the at least one continuous rib (7) of the sealing surface (6) of the seal (4) is arranged axially opposite the groove (8) of the seal (4).

5. The filter element according to claim 3, wherein the at least one continuous groove (7) of the sealing surface (6) of the seal (4) is arranged axially opposite the groove (8) of the seal (4).

6. The filter element according to claim 1, wherein the filter medium (3) consists of a filter fleece.

7. The filter element according to claim 1, wherein the filter medium (3) is a pleated filter or a flat filter.

8. A dirt suction device comprising: a filter receptacle (10, 20), wherein the filter receptacle comprises a lower part (10) having a lower sealing surface (12), and an upper part (20) having a upper sealing surface (23), and a replaceable filter element (1), wherein the replaceable filter element (1) comprises a filter frame (2), a filter medium (3) attached to the filter frame (2), a continuous seal (4) arranged on the filter frame (2), the continuous seal (4) having an inner circumferential surface arranged on an outer circumferential surface of the filter frame (2) and a protruding section (4a) that radially protrudes over the filter frame (2), a groove (8) arranged on a front side of the protruding section (4a) of the seal (4) of the filter element (1), wherein the lower sealing surface (12) of the lower part (10) of the filter receptacle engages in the groove (8) of the filter element (1), and a sealing surface (6), bearing against the upper sealing surface (23) of the upper part, arranged on an opposite front side of the protruding section (4a) of the seal (4), wherein the filter element (1) is retained between the sealing surfaces (12, 23) of the lower part (10) and the upper part (20).

9. The dirt suction device according to claim 8, wherein on the upper part (20) of the filter receptacle, a seal (22) is arranged which forms the sealing surface (23).

10. The dirt suction device according to claim 8, wherein the sealing surface (6) of the seal (4) of the filter element (1) is profiled and has at least one rib (7) which protrudes from the sealing surface (6), wherein at least one the rib (7) bears against the upper sealing surface (23) of the upper part (20) of the filter receptacle.

11. The dirt suction device according to claim 10, wherein that the upper sealing surface (23) of the upper part (20) of the filter receptacle is profiled and has at least one groove provided in the sealing surface (23), wherein the at least one rib (7) of the seal (4) of the filter element (1) engages in the at least one groove of the upper sealing surface (23) of the upper part (20) of the filter receptacle.

12. The dirt suction device according to claim 8, wherein the upper sealing surface (23) of the upper part (20) of the filter receptacle is profiled and has at least one rib (24) which protrudes from the sealing surface (23), wherein the at least on rib (24) of the upper sealing surface (23) of the upper part (20) bears against the sealing surface (6) of the seal (4) of the filter element (1).

13. The dirt suction device according to claim 12, wherein the sealing surface (6) of the seal (4) of the filter element (1) is profiled and has at least one groove, wherein the at least one rib (24) of the upper sealing surface (23) of the upper part (20) of the filter receptacle engages in the at least one groove of the seal (4) of the filter element (1).

14. The dirt suction device according to claim 8, wherein the filter medium (3) is a filter fleece.

15. The dirt suction device according to claim 8, wherein the filter medium (3) is a pleated filter or a flat filter.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In the following, the invention shall be described using the drawings and a preferred embodiment.

[0038] The drawings and their description shall result in further features and advantages of the invention.

[0039] FIG. 1 shows a view of a filter element according to the invention.

[0040] FIG. 2 shows a partial section of the upper part and the lower part of the filter receptacle with the filter element arranged between said parts.

[0041] FIG. 3 shows a design of the upper part and the lower part of the filter receptacle with the filter element arranged between said parts, which is modified when compared to FIG. 2.

DETAILED DESCRIPTION

[0042] FIG. 1 shows a perspective view of the filter element 1 according to the invention. For example, the filter element 1 has a rectangular filter frame 2 on which a filter medium 3 is attached. The filter frame can, for example, be made of plastic and/or metal.

[0043] The filter medium 3 can, for example, be designed as pleated filter which is made of a paper or plastic fleece.

[0044] Such a filter element 1, for example, is to be installed in a filter receptacle of a dirt suction device. A replacement of the filter element 1 is supposed to be quick and simple.

[0045] For sealing the filter element 1 with respect to the filter receptacle, a continuous seal 4 is arranged on the outer edge of the filter frame 2 which is made of a rubber-like material or a soft plastic. The corners 5 of the seal 4 are preferably rounded.

[0046] The seal 4 has an upper sealing surface 6. On the upper sealing surface 6, a continuous rib 7 is provided which ensures particularly good sealing with respect to the filter receptacle, as will be described in the following.

[0047] FIG. 2 shows a partial section of the arrangement of the filter element 1 and the filter receptacle.

[0048] Depicted are the filter element 1 with the filter frame 2 and the filter medium 3. The seal 4 is attached to the edge of the filter frame 2.

[0049] With an inner circumferential surface, the seal 4 bears against an outer circumferential surface of the filter frame 2, and rests on the upper side of the filter frame 2.

[0050] The seal 4, for example, is injection-molded onto the filter frame 2, resulting in a secure and tight connection between the filter frame 2 and the seal 4.

[0051] According to the invention, the seal 4 forms a radial protrusion 4a over the filter frame 2. The radially protruding section 4a of the seal 4 extends radially over the edge of the filter frame 2 approximately into the plane of the filter frame 2.

[0052] On its lower end face, the protruding section 4a of the seal 4 has a groove 8. On its upper end face, the protruding section 4a of the seal 4 has a sealing surface 6.

[0053] On the upper sealing surface 6 of the seal 4, a rib 7 is arranged which protrudes upwardly from the sealing surface.

[0054] The filter receptacle, for example, consists of a lower part 10 and an upper part 20. For installing or replacing the filter element 1, the upper part 20 can be separated from the lower part 10 by folding away or lifting said upper part 20.

[0055] The lower part 10 of the filter receptacle has a continuous edge 11, which is inwardly oriented and forms an approximately horizontally extending sealing surface 12 on its outer section.

[0056] The filter element 1 is inserted in the lower part 10 of the filter receptacle such that the outer edge of the filter receptacle 10 engages with the sealing surface 12 in the groove 8 of the seal 4 of the filter element 1.

[0057] The sealing surface 12 of the lower part 10 of the filter receptacle thus bears against the floor surface of the groove 8 of the seal 4 of the filter element 1. This results in a mechanically stable and particularly sealing positioning of the filter element 1 on the lower part 10 of the filter receptacle.

[0058] Once the filter element 1 is positioned on the lower part 10 of the filter receptacle, the upper part 20 of the filter receptacle can be placed on and fastened to the lower part 10.

[0059] The upper part 20 of the filter receptacle has a groove 21 which is positioned axially opposite the upper sealing surface 6 of the seal 4 of the filter element 1. In the groove 21 of the upper part 20 of the filter receptacle, a seal 22 is preferably arranged, said seal 20 being made of the rubber-like material or a soft plastic.

[0060] When the filter element 1 is arranged in the filter receptacle 10, 20, the upward protruding rib 7 of the seal 4 of the filter element is pressed against the lower sealing surface 23 of the seal 22 of the upper part 20. The rib 7 of the seal 4 can to some extent deform the elastic sealing surface 23 of the seal 4, resulting in a mechanically stable and good sealing between the seal 22 of the upper part 20 of the filter receptacle and the seal 4 of the filter element 1.

[0061] The mechanical forces, which are exerted by the upper part 20 onto the seal 4 of the filter element 1 and the sealing surface 12 of the lower part 10 of the filter receptacle, run along a vertically, i.e. axially extending line. As a result, the seal 4 of the filter element 1 is retained mechanically stable between the lower part 10 and the upper part 20 of the filter receptacle.

[0062] In particular, no shearing forces or lateral forces act on the seal 4, which could improperly deform the seal 4 of the filter element 1 and thus result in mechanical stress or excessive wear.

[0063] The mechanical stress on the seal 4 during the operation of the dirt suction device and during the cleaning process of the filter element 1 remains low.

[0064] An important feature of the invention is that of the seal 4 protruding radially over the filter element 1, so that the attachment of the seal 4 on the filter element and the sealing surfaces for sealing on the filter receptacle 10, 20 are independent of one another.

[0065] FIG. 3 shows a design which is modified when compared to FIG. 2, wherein the same components are denoted with the same reference signs.

[0066] Essentially, the description of FIG. 2 applies to FIG. 3.

[0067] Contrary to FIG. 2, the upper sealing surface 6 of the seal 4 of the filter element 1 has no rib but is designed as an essentially planar sealing surface 6.

[0068] The seal 22, which is arranged in the groove 21 of the upper part 20 of the filter receptacle, has a downward directed rib 24 which points in the direction of the sealing surface 6 of the filter element 1.

[0069] When the filter element 1 is arranged in the filter receptacle 10, 20, the rib 24 of the seal 25 is pressed against the upper sealing surface 6 of the seal 4 of the filter element 1. The rib 24 of the seal 25 can to some extent deform the elastic sealing surface 6 of the seal 4, resulting in a good sealing between the seal 22 of the filter receptacle and the seal 4 of the filter element 1.

[0070] In FIG. 2, it can be provided that the seal 22 of the upper part 20 of the filter receptacle has a groove (not depicted) which is arranged above the rib 7 of the seal 4 of the filter element 1. When the upper part 20 of the filter receptacle is installed, the rib 7 of the seal 4 of the filter element 1 engages in the groove of the seal 22 of the upper part 20, thus resulting in a good sealing effect.

[0071] This can similarly also be provided in FIG. 3, wherein a groove (not depicted) can be arranged in the sealing surface 6 of the seal 4 opposite the rib 24 of the seal 22 of the upper part of the filter receptacle.

LIST OF REFERENCE SIGNS

[0072] 1 Filter element [0073] 2 Filter frame [0074] 3 Filter medium [0075] 4 Seal [0076] 4a Protruding section [0077] 5 Corner [0078] 6 Sealing surface [0079] 7 Rib [0080] 8 Groove [0081] 10 Lower part of the filter receptacle [0082] 11 Edge [0083] 12 Sealing surface [0084] 20 Upper part of the filter receptacle [0085] 21 Groove [0086] 22 Seal [0087] 23 Sealing surface [0088] 24 Rib