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 for a dirt suction device comprising: a filter frame, a filter medium attached to the filter frame, a continuous first seal arranged on the filter frame, the continuous first seal having an inner circumferential surface arranged on an outer circumferential surface of the filter frame and a protruding section that radially protrudes over the filter frame, a groove arranged on a front side of the protruding section of the first seal, a first sealing surface arranged on an opposite front side of the protruding section of the first seal, and a second seal arranged at an upper part of a filter receptacle and forming a second sealing surface, wherein the first sealing surface is pressed on the second sealing surface, and wherein a lower sealing surface of a lower part of the filter receptacle engages in the groove of the filter element.

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

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

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

5. The filter element according to claim 3, wherein the at least one continuous groove of the first sealing surface of the first seal is arranged axially opposite the groove of the first seal.

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

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

8. A dirt suction device comprising: a filter receptacle, wherein the filter receptacle comprises a lower part having a first sealing surface, and an upper part having a second sealing surface, and a replaceable filter element, wherein the replaceable filter element comprises a filter frame, a filter medium attached to the filter frame, a continuous first seal arranged on the filter frame, the continuous first seal having an inner circumferential surface arranged on an outer circumferential surface of the filter frame and a protruding section that radially protrudes over the filter frame, a first groove arranged on a front side of the protruding section of the first seal of the filter element, wherein the first sealing surface of the lower part of the filter receptacle engages in the first groove of the filter element, a third sealing surface, bearing against the second sealing surface of the upper part, arranged on an opposite front side of the protruding section of the first seal, and a second seal arranged at an upper part of the dirt suction device and forming the second sealing surface, the third sealing surface being pressed on the second sealing surface, wherein the filter element is retained between the first and second sealing surfaces, wherein the third sealing surface is profiled and has at least one rib or groove provided in the third sealing surface, and wherein at least rib or groove of the first seal engages in the at least one groove or rib of the third sealing surface.

9. The dirt suction device according to claim 8, wherein the second seal is arranged on the upper part of the filter receptacle to form the sealing surface.

10. The dirt suction device according to claim 8, wherein the first sealing surface is profiled and comprises the at least one rib which protrudes from the first sealing surface.

11. The dirt suction device according to claim 8, wherein the at least one rib (24) of the second sealing surface bears against the first sealing surface.

12. The dirt suction device according to claim 11, wherein the first sealing surface of the seal of the filter element is profiled and has at least one groove, wherein the at least one rib of the second sealing surface engages in the at least one groove of the first seal.

13. The dirt suction device according to claim 8, wherein the filter medium is a filter fleece.

14. The dirt suction device according to claim 8, wherein the filter medium is a pleated filter or a flat filter.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In the following, the invention shall be described using the drawings and a preferred embodiment.

(2) The drawings and their description shall result in further features and advantages of the invention.

(3) FIG. 1 shows a view of a filter element according to the invention.

(4) 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.

(5) 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

(6) 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.

(7) The filter medium 3 can, for example, be designed as pleated filter which is made of a paper or plastic fleece.

(8) 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.

(9) 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.

(10) 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.

(11) FIG. 2 shows a partial section of the arrangement of the filter element 1 and the filter receptacle.

(12) 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.

(13) 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.

(14) 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.

(15) 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.

(16) 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.

(17) On the upper sealing surface 6 of the seal 4, a rib 7 is arranged which protrudes upwardly from the sealing surface.

(18) 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.

(19) 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.

(20) 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.

(21) 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.

(22) 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.

(23) 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.

(24) 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.

(25) 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.

(26) 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.

(27) 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.

(28) 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.

(29) FIG. 3 shows a design which is modified when compared to FIG. 2, wherein the same components are denoted with the same reference signs.

(30) Essentially, the description of FIG. 2 applies to FIG. 3.

(31) 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.

(32) 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.

(33) 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.

(34) 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.

(35) 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

(36) 1 Filter element 2 Filter frame 3 Filter medium 4 Seal 4a Protruding section 5 Corner 6 Sealing surface 7 Rib 8 Groove 10 Lower part of the filter receptacle 11 Edge 12 Sealing surface 20 Upper part of the filter receptacle 21 Groove 22 Seal 23 Sealing surface 24 Rib