Filter element with filter pockets

Abstract

The present disclosure relates to a filter element that includes a frame and bag-type filter pockets which are connected to the frame. The filter pockets have an inflow side and an outflow side, wherein at least one opening is present on the inflow side for the inlet of a fluid to be filtered by the filter pockets. The interior of each of the filter pockets tapers in the direction of their respective outflow side. Fluid-guiding elements are provided on the inflow and/or the outflow side of the filter pockets. An efficient filter element in which the fluid to be filtered is effectively cleaned is therefore provided.

Claims

1. A filter element having an outflow side and an inflow side, the filter element comprising: a frame; and bag-like filter pockets connected to the frame, the bag-like filter pockets having an inflow side and an outflow side oriented towards the inflow and outflow sides of the filter element, respectively; wherein: each of the bag-like filter pockets comprises at least one wall that defines an interior space of a respective one of the bag-like filter pockets, such that the interior space tapers in a direction of an outflow side of the bag-like filter pockets; the at least one wall of the bag-like filter pockets comprises an inflow surface oriented towards the inflow side of the bag-like filter pockets and an outflow surface oriented towards the outflow side of the bag-like filter pockets; each of the bag-like filter pockets comprise at least one opening so that a fluid which is to be filtered can enter into the interior space thereof from the inflow side of the filter element; and the filter element further comprises fluid-guiding elements arranged on the outflow side of said bag-like filter pockets.

2. The filter element as claimed in claim 1, wherein the fluid-guiding elements are at least partially curved or arcuate.

3. The filter element as claimed in claim 1, wherein the fluid-guiding elements are at least partially circular in cross section.

4. The filter element as claimed in claim 1, wherein the fluid-guiding elements are air baffle plates.

5. The filter element as claimed in claim 1, wherein the fluid-guiding elements are separate components that are each releaseably coupled to the outflow surface of the at least one wall of a respective one of the bag-like filter element.

6. The filter element as claimed in claim 1, wherein: each of the bag-like filter pockets taper to a pointed end in a direction towards the outflow side of the filter element; each of the fluid-guiding elements are arranged on a respective one of the pointed ends of the bag-like filter pockets.

7. The filter element as claimed in claim 1, wherein: said fluid guiding elements comprise first fluid-guiding elements and second fluid-guiding elements; each of said first fluid-guiding elements is arranged on the outflow surface of the at least one wall of a respective one of said bag-like filter pockets; and each of said second fluid-guiding elements is arranged between at least two of said bag-like filter pockets on an outflow side of said filter element.

8. The filter element as claimed in claim 1, wherein the fluid-guiding elements and the frame are formed in one piece, such that the frame and the fluid guiding elements are integral with one another.

9. The filter element as claimed in claim 1, wherein: the frame comprises an inflow-side upper edge; the fluid guiding elements comprise an outflow end; and the fluid-guiding elements maintain a spacing of not more than 5 d from the inflow-side upper edge, where d represents the distance which runs from the inflow-side upper edge to the outflow end of each of the bag-like filter pockets.

10. The filter element as claimed in claim 1, wherein each of the bag-like filter pockets have folded walls, wherein the folded walls have pleating.

11. The filter element as claimed in claim 10, wherein the at least one wall of each of said bag-like filter pockets is formed by a flat filter element.

12. A module comprising fluid-guiding elements for producing a filter element as claimed in claim 1.

13. The filter element of claim 8, wherein the frame and the bag-like fluid filter pockets are formed from the same material.

Description

BRIEF DESCRIPTION OF THE DRAWING

(1) FIG. 1 shows a prior-art filter element designed in the form of a pocket filter,

(2) FIG. 2 shows a prior-art filter element designed in the form of a pocket filter along with a vortex-forming flow field on the outflow side,

(3) FIG. 3 shows a schematic view of a filter element which has tubular fluid-guiding elements,

(4) FIG. 4 shows a schematic view of a further filter element, which has fluid-guiding elements configured in the form of air baffle plates,

(5) FIG. 5 shows a schematic view of a filter element which has tubular fluid-guiding elements which are formed in one piece with the frame,

(6) FIG. 6 shows a schematic view of a further filter element, which has first fluid-guiding elements, which are of droplet-like configuration, and further, separate fluid-guiding elements, which are arranged between the first fluid-guiding elements, and

(7) FIG. 7 shows a view of a further filter element, the frame of which is assigned flat pleated filter elements which form the filter pockets, wherein first fluid-guiding elements of droplet-like configuration are provided, and wherein further, separate fluid-guiding elements, which are arranged between the first fluid-guiding elements, are provided.

DETAILED DESCRIPTION

(8) FIG. 1 shows a prior-art filter element comprising a frame 1 and bag-like filter pockets 2 connected thereto, wherein the filter pockets 2, on the inflow side, have openings 3 so that a fluid which is to be filtered can enter into the interior spaces 4 of the filter pockets, and wherein the interior spaces 4 taper in the direction of an outflow side 5.

(9) FIG. 2 shows that vortices 6 form on the outflow side 5 of a prior-art filter element. The vortices 6 form beneath the pointed ends or edges of the filter pockets 2 and result in an undesired loss in pressure between the inflow side 9 and outflow side 5.

(10) FIG. 3 shows a filter element according to the invention, in the case of which fluid-guiding elements 7 are arranged on the outflow side 5 of the filter pockets 2.

(11) The fluid-guiding elements 7 are partially circular in cross section. In specific terms, the fluid-guiding elements 7 are configured in the form of tubes, or are tubular, and adjoin the pointed ends of the filter pockets 2.

(12) FIG. 4 shows a further filter element according to the invention, in the case of which fluid-guiding elements 7 are arranged on the outflow side 5 of the filter pockets 2.

(13) The fluid-guiding elements 7 are designed as air baffle plates. The air baffle plates are concave in the direction of the outflow side 5. Two air baffle plates are assigned to each filter pocket 2.

(14) The fluid-guiding elements 7, 7 may also be configured as separate components which can be removed from the filter element or can be connected to the same. The fluid-guiding elements 7, 7 are arranged on the frame 1, but could also be arranged separately from the same.

(15) The filter pockets 2 have folded walls 8, wherein the walls 8 have pleating. The filter pockets 2 are produced from nonwoven fabric.

(16) FIG. 4 shows that the fluid-guiding elements 7 maintain a spacing of not more than 5 d from the inflow-side upper edge 1a of the frame 1, where d represents the distance which runs from the inflow-side upper edge 1a to the outflow end 2a of the filter pockets 2. The distance runs orthogonally to the inflow plane 1b, which is defined by the frame 1.

(17) Said spacing is also possible in an analogous manner for the filter elements of FIGS. 3 and 5 to 7.

(18) FIG. 5 shows a filter element according to the invention, in the case of which fluid-guiding elements 7 are arranged on the outflow side 5 of the filter pockets 2. These fluid-guiding elements 7 are connected in one piece to the frame 1.

(19) The fluid-guiding elements 7 are partially circular in cross section. In specific terms, the fluid-guiding elements 7 are configured in the form of tubes, or are tubular, and adjoin the pointed or blunt ends 2a of the filter pockets 2.

(20) FIG. 6 shows a filter element according to the invention, in the case of which fluid-guiding elements 7, 7 are arranged on the outflow side 5 of the filter pockets 2.

(21) First fluid-guiding elements 7 are fastened at the ends 2a of the filter pockets 2. The first fluid-guiding elements 7 are at least partially or wholly of droplet-like configuration in cross section.

(22) Second fluid-guiding elements 7 are positioned as separate components between the first fluid-guiding elements 7.

(23) The second fluid-guiding elements 7 are oval or elliptical in cross section.

(24) First fluid-guiding elements 7 are arranged at the outflow ends 2a of the filter pockets 2 and second fluid-guiding elements 7 are arranged as separate components between the walls 8 and between the outflow ends 2a of the filter pockets 2.

(25) FIG. 7 shows a filter element according to the invention, in the case of which fluid-guiding elements 7, 7 are arranged on the outflow side 5 of the filter pockets 2.

(26) A wall 8 of a filter pocket 2 is formed by one flat filter element 2b, which is arranged on the frame 1 with inclination at an acute angle in relation to another filter element 2b.

(27) The flat filter elements 2b are folded, produced from nonwoven fabric and form the walls 8 of the filter pocket 2.

(28) To this extent, the filter pockets 2 have folded walls 8, wherein the walls 8 have pleating.

(29) First fluid-guiding elements 7 are fastened at the ends of the filter pockets 2. The first fluid-guiding elements 7 are of droplet-like configuration in cross section.

(30) Second fluid-guiding elements 7 are positioned as separate components between the first fluid-guiding elements 7.

(31) The second fluid-guiding elements 7 are oval or elliptical in cross section.

(32) With reference to FIGS. 3 to 7, it should be explained here that pointed ends 2a or edges may also be of rounded, frustoconical or flattened design, as long as they taper in the outflow direction. The fluid-guiding elements 7, 7, 7, 7, 7 extend along these ends 2a or parallel to the same. The fluid-guiding elements 7, 7, 7, 7, 7 are configured in the form of elongate bodies.