Box type filter

Abstract

The invention relates to a cassette filter having filter elements with a special folded structure, comprising a frame and a plurality of filter elements having a filter medium provided with a folded structure, the filter elements being accommodated in the frame, the invention relates to a filter element comprising a plurality of filter elements arranged adjacent to each other in such a way that each at least two filter elements adjacent to each other are arranged at an acute angle to each other and thus have a V-shaped arrangement, the filter elements having folded edges which are formed by folded peaks and folded valleys and extend perpendicular to the sides of the acute angle, the respective filter element being provided with a folded structure, the filter element is designed such that the height of the filter element in all edge regions is smaller than the height in the middle region of the filter element, and in each edge region, a folding surface that is smaller than the folding surface in the middle region of the filter element is obtained. By using the filter element, the differential pressure of the cassette filter can be reduced in an advantageous manner.

Description

technical field [0001] The invention relates to a filter cassette according to the preamble of claim 1 . Background technique [0002] Cassette filters are known from the prior art, for example from WO 2013 / 185878 A1 (see FIG. 7 there). Cassette filters have a frame in which a plurality of filter elements are accommodated. In this case, the filter element generally comprises a pleated, ie folded, filter medium. The filter elements are accommodated in the frame in such a way that every two adjacent filter elements are arranged at an acute angle to each other and thus have a V-shaped arrangement. The flow direction of the cassette filter is usually from the wide side of the V-shape to the tip of the V-shape. The air to be filtered then passes through the opening between the two filter elements into the filter. The corresponding V-shaped arrangement of the individual filter elements can be referred to as a filter pack. The filter elements adjoining one another are connecte...

AI Technical Summary

Problems solved by technology

However, it is problematic here that when glass fiber paper is used as filter medium, there is a risk of damage to the filter medium due to the low mechanical strength of the glass fiber paper

In an alternative solution with a beveled cut through the filter element, a reliable seal of the filter element in the region of its beveled connection can only be achieved with difficulty

Here, potential leak sites may be easily created

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