Filter element and double-pleated air filter using same

Abstract

The invention provides a double-pleated air filter which exhibits low pressure loss and thus can be used in a high-volume airflow, wherein filter elements obtained by folding a filtering material a large number of times while ensuring gaps (air paths) between the pleats by defining the thickness of the filtering material, the pitch of the pleats, and the shape of the folds, are disposed in a V-bank structure. The filter elements are formed by folding a filtering material in a zigzag pattern while maintaining spaced between the folds by means of spacers, and satisfy the relationships c' / c = 1.1, c' = a - e = 0.45 mm, c = a / 2 - d and e / d = 2, where a is the distance (pitch) between the crests of a pleat and an adjacent pleat, b is the width of the folds of the filtering material, c is the distance (center spacing) between the pleats in the filtering material measured at the centers (positions at the middle of the width (b) of the folds) of adjacent pleats, c' is the distance (opening spacing) between the pleats in the filtering material measured near the crests of adjacent pleats, d is the thickness of the filtering material, and e is the width (width at the tip) measured near the crest of a pleat.

Description

technical field [0001] The present invention relates to a filter element formed by folding a filter material and a double-pleated air filter in which the filter element is arranged in a V shape. Background technique [0002] Patent Document 1 discloses that the low pressure loss of a double-pleated air filter obtained by arranging a filter element in a V-shape, wherein the filter element is formed by folding a filter material in a zigzag shape, is disclosed. of. In the same document, a dust collection filter is formed by arranging 5 to 7 sets of filter assemblies in a V-shape. The filter assembly is a filter material with a thickness of 0.1 mm to 0.3 mm folded into a zigzag shape. , and the width of the folded small pleats is set to 10 mm to 30 mm, and the pitch size is set to 1.7 mm to 3.2 mm. [0003] For this dust collection filter, in order to prevent the increase of the flow resistance caused by the shape due to the contact of adjacent filter assemblies or the reducti...

AI Technical Summary

Problems solved by technology

[0006] However, since the pleat shape of the filter material forming the filter element is not considered, especially the gap between adjacent pleats for air to pass is not considered, the low pressure loss as a filter element is not sufficient.

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