Filter element and double-pleated air filter using same

A filter and element technology, applied in the fields of dispersed particle filtration, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of not considering the shape of pleats, not considering the gap design, insufficient low pressure loss of filter elements, etc. achieve the effect of reducing the width

Inactive Publication Date: 2012-05-09
NIPPON MUKI CO LTD
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  • Summary
  • Abstract
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Problems solved by technology

[0006] However, since the pleat shape of the filter material forming the filter element is not considered, especially the

Method used

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  • Filter element and double-pleated air filter using same
  • Filter element and double-pleated air filter using same
  • Filter element and double-pleated air filter using same

Examples

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Embodiment

[0057] Next, examples of the double-pleated air filter of the present invention will be described together with conventional examples and comparative examples.

[0058] As Examples 1 to 7 and Comparative Examples 1 to 4, under the conditions shown in Table 1 below, glass with a pressure loss of 265 Pa (at 5.3 cm / s) and an efficiency of 99.97% or more (at 0.2 μm to 0.5 μm) was used. Fibrous filter material, making a filter element 1 whose external dimensions are 280 mm in length x 600 mm in width x 15 mm to 40 mm in folded width, and surrounded by filter frames 11 to 14 made of steel plates with the aid of polyurethane resin sealant , to produce a double-pleated air filter with dimensions of 610 mm in length x 610 mm in width x 290 mm in depth.

[0059] In addition, as Conventional Example 1, except that a filter material made of glass fiber with a thickness d of 0.40 mm, a pressure loss of 265 Pa (at 5.3 cm / s), and an efficiency of 99.97% or more was used, the same procedure w...

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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...

Claims

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Application Information

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IPC IPC(8): B01D46/52
CPCB01D46/125B01D46/522B01D46/121
Inventor 今野幸浩渡边诚浩山口健林嗣郎
Owner NIPPON MUKI CO LTD
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