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DE-102014009886-B4 - Filter element for filtering media

DE102014009886B4DE 102014009886 B4DE102014009886 B4DE 102014009886B4DE-102014009886-B4

Abstract

Filter element for filtering media, in particular gases, especially intake air, fuel, urea solution or engine oil, in particular of an internal combustion engine, especially of a motor vehicle, or ambient air for introduction into ventilation systems of buildings or vehicles, with a zigzag-folded filter medium, comprising the following features: - each fold (6) is formed from two fold sheets which meet to form a fold point (7) on the exposed raw side (3); - two adjacent folds (6) form a fold base (8) together; - the raw side (3) and/or the clean side (4) of the filter medium has a plurality of elongated adhesive sections along at least two adhesive tracks (14), each with at least one adhesive section and at least one adhesive interruption (15), characterized by the following features: - the mutual distance between the two fold leaves in the area of the fold tip (7) is between zero and two mm, or the two fold leaves in the area of the fold tip (7) lie against each other; - the fold spacing (9) between the two fold sheets of a fold pocket (11) is at least twice the fold spacing in the area of the fold base (8) in the area of the fold apex (7), wherein the fold pockets (11) are angular and are produced by providing embossing lines and the fold base (8) is formed from a polygon - the ratio of the fold height (10) to the fold spacing (9) in the area of the fold base (8) is greater than 25 : 1, 50 : 1, 150 : 1 or lies between these values.

Inventors

  • Gelase Mbadinga-Mouanda
  • Michael Heim
  • Gunnar-Marcel Klein

Assignees

  • MANN+HUMMEL GMBH

Dates

Publication Date
20260513
Application Date
20140704

Claims (7)

  1. Filter element for filtering media, in particular gases, especially intake air, fuel, urea solution or engine oil, in particular of an internal combustion engine, especially of a motor vehicle, or ambient air for introduction into ventilation systems of buildings or vehicles, with a zigzag-folded filter medium, comprising the following features: - each fold (6) is formed from two pleats which together form a pleat point (7) on the exposed raw side (3); - two adjacent pleats (6) together form a pleat base (8); - the raw side (3) and/or the clean side (4) of the filter medium has a plurality of elongated adhesive sections along at least two adhesive tracks (14), each with at least one adhesive section and at least one adhesive interruption (15), characterized by the following features: - the mutual distance of the two pleats in the region of the pleat point (7) is between zero and two mm, or the two pleats in the region of the pleat point (7) lie against each other; - the pleat spacing (9) between the two pleats of a pleat pocket (11) is at least twice the pleat spacing in the area of the pleat apex (7) in the area of the pleat base (8), wherein the pleat pockets (11) are angular and are produced by providing embossing lines and the pleat base (8) is formed from a polygon - the ratio of the pleat height (10) to the pleat spacing (9) in the area of the pleat base (8) is greater than 25 : 1, 50 : 1, 150 : 1 or lies between these values.
  2. Filter element after Claim 1 , characterized in that the folding sheets (12, 13) of at least one folding pocket (11) are parallel to each other or inclined to each other.
  3. Filter element after Claim 1 or 2 , characterized in that the adhesive traces (14) are arranged equidistantly.
  4. Filter element after one of the Claims 1 until 3 , characterized in that the distances between adjacent adhesive traces (14) increase or decrease when viewed in the direction of the fold tip from one end face of the filter element (2) to the other end face.
  5. Filter element after one of the Claims 1 until 4 , characterized in that the distances between adjacent adhesive traces (14) are determined with respect to a perpendicular dimension to the fold edges, preferably with respect to the extent of the filter medium in the direction of the fold edges, the mirror plane increases especially towards the outside.
  6. Filter element after one of the Claims 1 until 5 , characterized in that the filter element (2) is a flat filter element.
  7. Filter element after one of the Claims 1 until 6 , characterized by its use at a filtration rate of the medium of < 6 cm/s.

Description

Technical field The invention relates to a filter element for a filter for filtering media, in particular gases, especially intake air, fuel or engine oil, particularly from an internal combustion engine, particularly from a motor vehicle, or ambient air for introduction into ventilation systems of buildings or vehicles, comprising a zigzag-folded filter medium with a raw side and a clean side, wherein a plurality of elongated adhesive sections are arranged on the raw side and/or on the clean side of the filter medium along at least two adhesive tracks, which run at least partially obliquely or perpendicularly to the fold edges, wherein at least one adhesive section and at least one adhesive interruption are arranged on each adhesive track. The adhesive tracks serve in particular to stabilize the filter element and/or to stabilize the folds. State of the art Various filters with folded filter media are known from the state of the art. WO 2007 / 056 567 A1 describes a device and a method for manufacturing folded filter elements of different fold heights. WO 2011 / 026 999 A1 describes a variety of filter elements with differently designed adhesive applications. Other relevant intellectual property rights are: AT 368 402 B , EP 0 948 986 A1 , FR 2 490 970 A1 , as well as US 2011 / 0 186 504 A1 . Task The invention is based on the objective of creating a filter element that is stable, even with large pleat heights, and that exhibits the highest possible filter efficiency. The filter element should maintain high stability during operation. The flow pattern of the medium to be filtered should be optimized as much as possible. This problem is solved by designing a filter element according to claim 1. The inventor has combined the well-known method of applying traces of adhesive with the design of the folds. A filter element for filtering a medium, particularly for an internal combustion engine, is proposed, featuring a folding pattern designed to create the largest possible storage space, capable of holding a relatively large volume of particles to be filtered. This storage space is formed between two adjacent folded sheets. Viewed in a longitudinal section through the filter element, the storage space can be U-shaped, V-shaped, sack-shaped, or pear-shaped. On the raw side, where the medium to be filtered flows towards the filter element, each fold tapers to a very narrow point, acting as a flow divider. The storage space into which the medium to be filtered enters is thus intended to be large compared to the two adjacent spaces. Such an asymmetry leads to an increase in the storage volume on the raw side, and thus to a longer service life. More dust can be captured than with a symmetrical arrangement of the pleats of a pleated bag. The larger storage volume is particularly advantageous at lower filtration speeds, for example in commercial vehicle or industrial applications. In these applications, dust cake formation on the media surface is a significant factor. In practice, this refers to filtration speeds of the medium of, for example, < 6 cm/s. The invention is particularly well suited for use with flat filter elements, especially those with large pleat heights, but also with round filter elements. An important aspect is the internal support of each individual pleated pocket. Plastic spacers or support beads of adhesive can be used for this purpose. This is necessary because the negative pressures created in the intake manifold during the operation of an internal combustion engine can cause the pleats to collapse in the flow areas of the medium. This results in opposite sections of the filter media coming into direct contact with each other. Furthermore, material irregularities can cause stresses and deformations that lead to collapse on the raw side. The invention is explained in more detail with reference to the drawing. The drawing illustrates the following: 1 shows a filter element in perspective view. 2 The schematic representation shows a filter bellows made of filter medium of a first embodiment with several pleated pockets. 3 shows a filter bellows made of filter medium of a non-inventive embodiment with several pleated pockets. 4 The figure shows a perspective view of a section of a filter element with three pleated pockets. 5 shows a fragment of spacers in perspective. The in 1 The filter element 1 shown contains a filter bellows 2. Opposite is the clean-side outflow side 4. The filter bellows 2 is located in a plastic housing 5. The in 2 The filter bellows 2, shown in a section and a side view, has pleats 12 and 13. The medium to be filtered is fed in from the raw side 3 (inflow side) and discharged from the clean side 4 (outflow side). The pleat apex 7, facing the flow, tapers to a point. The pleat base 8, however, is very wide. See the pleat spacing 9 in the region of the pleat base. In this way, pleat pockets 11 of considerable volume are formed. Each pleat pocket is formed by two pleats 12 and 1