JP2006088048A - Air filter unit - Google Patents

Air filter unit Download PDF

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JP2006088048A
JP2006088048A JP2004277320A JP2004277320A JP2006088048A JP 2006088048 A JP2006088048 A JP 2006088048A JP 2004277320 A JP2004277320 A JP 2004277320A JP 2004277320 A JP2004277320 A JP 2004277320A JP 2006088048 A JP2006088048 A JP 2006088048A
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pleat
filter unit
air filter
pleats
air
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JP4699728B2 (en
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Toshiya Okamura
寿也 岡村
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Japan Vilene Co Ltd
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Japan Vilene Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y02A50/2351Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air filter unit having a large dust holding capacity and a long filter life, capable of reducing the load of disposal and a more running cost, and also without occurrence of a problem such that the angle of a pleat is spread by a wind pressure to make the pleat adhere to an adjacent pleat. <P>SOLUTION: The air filter unit comprises mounting a large number of pleats, and a double-pleat type filter member formed by making a folded angle of the pleat every fixed numbers among the pleats 180° and having a V-shape wherein a ratio P/h of the pitch of the pleat P to the height h is 0.21 to 0.35, the surface of the filter member is roughly parallel to the face of air intake in the face of the air intake of the air filter unit and an open area ratio a calculated by the equation given by äW-(h×n×2)}/W×100 is 40 to 55%. In the equation, W denotes a horizontal width of a filter range and n denotes threads per inch (a number of V-shape) of the double-pleat type filter member. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、ビル、工場、事務所などに設置される空気清浄装置に、パッケージフィルター、ファンコイルユニット、中央空調用フィルタユニット等として装着して使用される高風量型のエアフィルタユニットに関し、特に濾過寿命或いは粉塵保持能力に優れたエアフィルタユニットに関する。   The present invention relates to a high air volume type air filter unit used as an air purifier installed in a building, factory, office, etc. as a package filter, a fan coil unit, a central air conditioning filter unit, etc. The present invention relates to an air filter unit having excellent filtration life or dust holding ability.

従来から、ビル、工場、事務所などに設置される空気清浄装置には、パッケージフィルター、ファンコイルユニット、中央空調用フィルタユニット等として高風量型のエアフィルタユニットが使用されている。このようなエアフィルタユニットに関して、本出願人は実開昭62−87723号公報(特許文献1)に、ひだ折りされた濾材のひだを剛性材料により固定し、該剛性材料を部分的に切断することにより単数又は複数のV字型が形成された構造のVバンクフィルターを提案している。このVバンクフィルターは、多数のひだを更にV字型に交互に折ることにより大きな濾過面積とコンパクト性を具備していることを特長としており、好適な例として、ひだのピッチPが7〜8mmであり、ひだの高さhが15〜20mmであり、P/hの値が0.47〜0.4であるVバンクフィルターを提案している。   2. Description of the Related Art Conventionally, high air volume type air filter units are used as air filter devices installed in buildings, factories, offices, and the like as package filters, fan coil units, central air conditioning filter units, and the like. With regard to such an air filter unit, the applicant of the present application disclosed in Japanese Utility Model Laid-Open No. 62-87723 (Patent Document 1) by fixing the pleats of the folded filter material with a rigid material and partially cutting the rigid material. Thus, a V bank filter having a structure in which one or a plurality of V shapes are formed is proposed. This V bank filter is characterized by having a large filtration area and compactness by alternately folding a large number of pleats into a V-shape. As a preferred example, the pleat pitch P is 7 to 8 mm. And a V bank filter having a pleat height h of 15 to 20 mm and a P / h value of 0.47 to 0.4 is proposed.

その後、本出願人により濾過面積をより大きくした改良品として、図3に示すように、ひだのピッチPが4.5〜5mmであり、ひだの高さhが30〜40mmであり、P/hの値が0.12〜0.17であるエアフィルタユニットについて検討を行った。このエアフィルタユニットにあっては、V字型の開き角度を広くしてエアフィルタユニット全体のひだ数を少なくして効率良く生産することによってイニシャルコストを低減する要求に答えることを目的とするものであった。しかし、近年廃棄処理の負担を軽減することや、ランニングコストをより低減することが求められるようになってきた。そこで、エアフィルタユニットの粉塵保持容量をより大きくして、濾過寿命をより長くすることが強く求められている。   Thereafter, as an improved product having a larger filtration area by the present applicant, the pitch P of the pleats is 4.5 to 5 mm, the height h of the pleats is 30 to 40 mm, and P / An air filter unit having a value of h of 0.12 to 0.17 was examined. The purpose of this air filter unit is to meet the demand for reducing the initial cost by increasing the V-shaped opening angle and reducing the number of pleats in the entire air filter unit for efficient production. Met. However, in recent years, it has been required to reduce the burden of disposal processing and to further reduce the running cost. Therefore, there is a strong demand to increase the dust holding capacity of the air filter unit to increase the filtration life.

また、エアフィルタユニットの改良技術として、特開2002−95922号公報(特許文献2)に、多数のひだと交互のV字型を有するダブルプリーツ型ろ材を枠に装着した空調用エアフィルタユニットであって、ひだピッチp(mm)とひだ高さh(mm)(h:23〜27mm)とが0.14≦p/h≦0.18であり、かつV字型の開き角度θが21度≦θ≦28度であることを特徴とする図4に示す空調用エアフィルタユニットが記載されている。しかし、この空調用エアフィルタユニットは、奥行き150mmの薄型でも定格風量が56m/minを超えるコンパクトで多風量型を目的とするものである。また、図4に示すように、ひだのピッチPとひだの高さhとの比P/hの値が0.14〜0.18と非常に小さい値となっているので、実際の使用に際しては、多風量になればなるほど風圧でひだの角度が広がり隣接するひだと付着してしまい本来のエアフィルタユニットとしての寿命がかえって短くなってしまうという問題があった。また、V字型の開き角度も広くなっており、前述のようにエアフィルタユニット全体のひだ数を少なくして効率良く生産することによってイニシャルコストを低減する要求に答えるという考え方に沿うものであった。 As an air filter unit improvement technique, Japanese Patent Application Laid-Open No. 2002-95922 (Patent Document 2) discloses an air conditioning air filter unit in which a double pleated filter medium having a V-shape alternating with many pleats is mounted on a frame. The pleat pitch p (mm) and the pleat height h (mm) (h: 23 to 27 mm) are 0.14 ≦ p / h ≦ 0.18, and the V-shaped opening angle θ is 21. The air-conditioning air filter unit shown in FIG. 4, characterized in that degrees ≦ θ ≦ 28 degrees, is described. However, this air filter unit for air conditioning is intended to be a compact and high air flow type with a rated air volume exceeding 56 m 3 / min even though it is thin with a depth of 150 mm. Further, as shown in FIG. 4, the ratio P / h between the pitch P of the pleats and the height h of the pleats is a very small value of 0.14 to 0.18. However, there is a problem that as the air volume increases, the angle of the pleat increases with the wind pressure, and the pleats adhere to adjacent pleats, which shortens the life of the original air filter unit. In addition, the opening angle of the V-shape is wide, and as described above, it is in line with the idea of meeting the demand for reducing the initial cost by efficiently producing the air filter unit by reducing the number of pleats. It was.

実開昭62−87723号公報Japanese Utility Model Publication No. 62-87723 特開2002−95922号公報JP 2002-95922 A

本発明は、上記の問題を解決し、粉塵保持容量が大きく、濾過寿命が長く、廃棄処理の負担を軽減することやランニングコストをより低減することが可能であり、且つ風圧でひだの角度が広がり隣接するひだと付着してしまうという問題も発生しないエアフィルタユニットを提供することを課題とする。   The present invention solves the above problems, has a large dust holding capacity, has a long filtration life, can reduce the burden of disposal processing, can further reduce running costs, and the angle of pleats can be reduced by wind pressure. It is an object to provide an air filter unit that does not cause the problem of spreading and adhering to adjacent pleats.

本発明のエアフィルタユニットに係る解決手段は、図1に例示するように、多数のひだ(11)と、前記ひだのうち一定数ごとのひだ(12)の折り角度を180度とすることによって形成された単数のV字型又は複数連結したV字型とを有するダブルプリーツ型の濾材をフィルタ枠(13)に装着してなるエアフィルタユニット(10)であって、図2に示すように、前記ひだのピッチP(mm)及び高さh(mm)(h:8〜30)との比P/hが0.21〜0.35であり、前記エアフィルタユニットの空気入口面において前記濾材の表面(折り角度180度の面)(12)が前記空気入口面に対して略平行になっており、{W−(h×n×2)}/W×100から算出した開口率aが40〜55%であることを特徴とするエアフィルタユニットである。   As illustrated in FIG. 1, the solution means according to the air filter unit of the present invention is configured such that the fold angle of a large number of pleats (11) and the pleats (12) for each predetermined number of the pleats is 180 degrees. An air filter unit (10) comprising a filter frame (13) mounted with a double pleated filter medium having a single V-shape or a plurality of connected V-shapes, as shown in FIG. The ratio P / h of the pleat pitch P (mm) and the height h (mm) (h: 8 to 30) is 0.21 to 0.35, and at the air inlet surface of the air filter unit, The surface of the filter medium (surface with a folding angle of 180 degrees) (12) is substantially parallel to the air inlet surface, and the aperture ratio a calculated from {W− (h × n × 2)} / W × 100 Is an air filter characterized by being 40-55% It is a knit.

本発明のエアフィルタユニットによって、粉塵保持容量が大きく、濾過寿命が長く、廃棄処理の負担を軽減することやランニングコストをより低減することが可能であり、且つ風圧でひだの角度が広がり隣接するひだと付着してしまうという問題も発生しないエアフィルタユニットを提供することが可能となった。   With the air filter unit of the present invention, the dust holding capacity is large, the filtration life is long, the burden of disposal processing can be reduced, and the running cost can be further reduced. It has become possible to provide an air filter unit that does not cause the problem of adhering to pleats.

以下、本発明に係るエアフィルタユニットの好ましい実施の形態について詳細に説明する。   Hereinafter, preferred embodiments of an air filter unit according to the present invention will be described in detail.

本発明に適用できる濾材としては、ひだ折りが可能な濾材である限り特に限定されず、例えば平均繊維径が10μm以下のメルトブロー不織布又は極細ガラス繊維不織布と、平均繊維径が10μmを超える繊維からなる補強用の不織布とを積層した比色法又は計数法で評価される複合不織布が好適に適用できる。   The filter medium applicable to the present invention is not particularly limited as long as it is a foldable filter medium. For example, the filter medium is composed of a melt blown nonwoven fabric or an ultrafine glass fiber nonwoven fabric having an average fiber diameter of 10 μm or less, and fibers having an average fiber diameter exceeding 10 μm. A composite nonwoven fabric evaluated by a colorimetric method or a counting method in which a reinforcing nonwoven fabric is laminated can be suitably applied.

前記メルトブロー不織布の材質、極細ガラス繊維不織布或いは補強用の不織布の材質は特に限定されず、ポリエチレンテレフタレート、ポリブチレンテレフタレートなどのポリエステル系繊維、ナイロン6、ナイロン66などのポリアミド系繊維、ポリプロピレン、ポリエチレンなどのポリオレフィン系繊維、ポリアクリロニトリルなどのアクリル系繊維、ポリビニルアルコール繊維および合成パルプなどの合成繊維に限らず、レーヨンなどの半合成繊維、綿およびパルプ繊維などの天然繊維、あるいはガラス繊維、セラミックス繊維、金属繊維などを単独で、又は適宜組み合わせて適用することができる。   The material of the melt blown nonwoven fabric, the material of the ultrafine glass fiber nonwoven fabric or the reinforcing nonwoven fabric is not particularly limited. Polyester fibers such as polyethylene terephthalate and polybutylene terephthalate, polyamide fibers such as nylon 6 and nylon 66, polypropylene, polyethylene, etc. Polyolefin fibers, acrylic fibers such as polyacrylonitrile, synthetic fibers such as polyvinyl alcohol fibers and synthetic pulp, semi-synthetic fibers such as rayon, natural fibers such as cotton and pulp fibers, or glass fibers, ceramic fibers, Metal fibers or the like can be applied alone or in appropriate combination.

前記補強用の不織布としては、例えばバインダ接着不織布、水流絡合不織布、ニードルパンチ不織布、繊維融着不織布、スパンボンド不織布、或いは紙などを単独で、又は適宜組み合わせた不織布を適用することができる。また、前記メルトブロー不織布の繊維径は10μm以下であることが好ましく、5μm以下がより好ましく、3μm以下が更に好ましい。   As the reinforcing non-woven fabric, for example, a binder-bonded non-woven fabric, a hydroentangled non-woven fabric, a needle punched non-woven fabric, a fiber-bonded non-woven fabric, a spunbonded non-woven fabric, or a non-woven fabric obtained by appropriately combining paper can be used. The fiber diameter of the melt blown nonwoven fabric is preferably 10 μm or less, more preferably 5 μm or less, and even more preferably 3 μm or less.

前記濾材としては、廃棄物処理あるいは無機繊維の飛散による影響の観点から、有機素材が好ましく、特にメルトブロー不織布と有機繊維からなる補強用の不織布との複合不織布であることが好ましく、この複合不織布に更にエレクトレット加工などの後加工を施した濾材は濾過性能がより優れているためより好適に使用できる。   The filter medium is preferably an organic material from the viewpoint of the effect of waste treatment or scattering of inorganic fibers, and particularly preferably a composite nonwoven fabric of a melt blown nonwoven fabric and a reinforcing nonwoven fabric composed of organic fibers. Furthermore, a filter medium that has been subjected to post-processing such as electret processing can be used more suitably because of its superior filtration performance.

前記濾材は多数のひだが折られているが、この折り加工方法としてはレシプロ式やロータリー式などのプリーツ加工機による方法や、ジグザグ形状に成形された押型でプレスする方法などがある。また、折り加工された濾材の隣接する折り壁が線状の樹脂固形物によって分離されていることが好ましく、この樹脂固形物としては、例えば、発泡又は無発泡ホットメルト樹脂やウレタン樹脂などを使用できる。この樹脂固形物は、濾材の補強としての効果もあり、濾材の折り壁を横切るように連続的に、又は不連続的に塗布して形成することができる。なお、この樹脂固形物は処理流体の流入側及び/又は流出側に設けることができる。   The filter medium is folded in a large number of pleats, and examples of the folding method include a method using a pleating machine such as a reciprocating type and a rotary type, and a method of pressing with a pressing die formed in a zigzag shape. Moreover, it is preferable that the adjacent folding wall of the folded filter medium is separated by a linear resin solid, and as this resin solid, for example, foamed or non-foamed hot melt resin or urethane resin is used. it can. This resin solid substance also has an effect of reinforcing the filter medium, and can be formed by continuously or discontinuously applying so as to cross the folding wall of the filter medium. In addition, this resin solid substance can be provided in the inflow side and / or outflow side of a processing fluid.

前記濾材には、図1及び図2に例示するように、多数のひだ(11)が形成されており、前記ひだのピッチP(mm)及び高さh(mm)(h:8〜30)との比P/hが0.21〜0.35である。前記ひだの高さは8〜30mmである必要があり、10〜30mmであることがより好ましい。また、P/hは0.21〜0.35である必要があり、0.23〜0.27であることがより好ましい。P/hが0.21未満であると、ひだの角度が小さくなり過ぎるので、風圧でひだの角度が広がり隣接するひだと付着してしまいデッドスペースとなり、エアフィルタユニットとしたときにかえって粉塵保持容量が低下してしまうという問題も生じる。また、P/hが0.35を超えると、ひだの数が少なくなり濾材全体の面積が少なくなり、エアフィルタユニットとしたときに粉塵保持容量が低下してしまうという問題が生じる。また、P/hが0.21〜0.35の範囲であっても、ひだの高さが8mm未満であるとひだの数が多くなり過ぎてイニシャルコストが非常に大きくなるという問題が生じる。またV字型の数が多くなりV字型の角度が小さくなりデッドスペースが多く生じてしまい、エアフィルタユニットとしたときにかえって粉塵保持容量が低下してしまうという問題も生じる。また、P/hが0.21〜0.35範囲であっても、ひだの高さが30mmを超えると濾材全体の面積が少なくなり、エアフィルタユニットとしたときにかえって粉塵保持容量が低下してしまうという問題が生じる。   A large number of pleats (11) are formed in the filter medium as illustrated in FIGS. 1 and 2, and the pitch P (mm) and height h (mm) of the pleats (h: 8 to 30). The ratio P / h is 0.21 to 0.35. The height of the pleats needs to be 8-30 mm, more preferably 10-30 mm. Moreover, P / h needs to be 0.21-0.35, and it is more preferable that it is 0.23-0.27. If P / h is less than 0.21, the pleat angle becomes too small, and the pleat angle is widened by the wind pressure and adheres to adjacent pleats, resulting in a dead space and holding dust when used as an air filter unit. There also arises a problem that the capacity decreases. Moreover, when P / h exceeds 0.35, the number of pleats is reduced, the area of the entire filter medium is reduced, and there is a problem that the dust holding capacity is reduced when the air filter unit is used. Even if P / h is in the range of 0.21 to 0.35, if the height of the pleats is less than 8 mm, the number of pleats increases so that the initial cost becomes very large. In addition, the number of V-shapes increases, the angle of the V-shape decreases, and a lot of dead space is generated, which causes a problem that the dust holding capacity is reduced when the air filter unit is used. Moreover, even if P / h is in the range of 0.21 to 0.35, if the height of the pleats exceeds 30 mm, the area of the entire filter medium is reduced, and the dust holding capacity is reduced when the air filter unit is used. Problem arises.

本発明では、図1に例示するように、エアフィルタユニット(10)の空気入口面において前記濾材の表面(折り角度180度の面)(12)が空気入口面に対して略平行になっており、{W−(h×n×2)}/W×100から算出した開口率aが40〜55%であるが、開口率は44〜51%であることがより好ましい。開口率が55%を超えると濾材全体の面積が少なくなり、エアフィルタユニットとしたときにかえって粉塵保持容量が低下してしまうという問題が生じる。また、開口率が40%未満では、エアフィルタユニットとしたときに初期の圧力損失が大きく上昇してしまい、濾過寿命が短くなり、粉塵保持容量が低下してしまうという問題が生じる。   In the present invention, as illustrated in FIG. 1, the surface of the filter medium (the surface having a folding angle of 180 degrees) (12) is substantially parallel to the air inlet surface on the air inlet surface of the air filter unit (10). The aperture ratio a calculated from {W− (h × n × 2)} / W × 100 is 40 to 55%, and the aperture ratio is more preferably 44 to 51%. When the opening ratio exceeds 55%, the area of the entire filter medium is reduced, and there arises a problem that the dust holding capacity is lowered when the air filter unit is used. In addition, when the aperture ratio is less than 40%, there is a problem that the initial pressure loss is greatly increased when the air filter unit is used, the filtration life is shortened, and the dust holding capacity is decreased.

本発明では、図2に示すように、前記V字型の開き角度θが5〜10度であることが好ましく、7〜9度であることがより好ましい。この開き角度は奥行の大きさにも係わっており、奥行が大きくなるにつれて開き角度は小さくなり、奥行が小さくなるにつれて開き角度は大きくなる関係にある。開き角度が5度未満であるとV字型の数が多くなり、加工が困難になる場合があり、開き角度が10度を超えると濾材全体の面積が少なくなり、粉塵保持容量が低下してしまう場合がある。   In the present invention, as shown in FIG. 2, the V-shaped opening angle θ is preferably 5 to 10 degrees, and more preferably 7 to 9 degrees. This opening angle is also related to the size of the depth, and the opening angle decreases as the depth increases, and the opening angle increases as the depth decreases. If the opening angle is less than 5 degrees, the number of V-shapes increases and processing may become difficult. If the opening angle exceeds 10 degrees, the entire area of the filter medium decreases, and the dust holding capacity decreases. May end up.

前記濾材はフィルタ枠に装着されている。このフィルタ枠は剛性のある材質である限り特に限定されず、木材、金属、プラスチック等が適用され、数回の洗浄再生の後に焼却、廃棄されることを考慮すると木材が好ましい。また、フィルタ枠の外形寸法は、縦H610mm×横W610mm×奥行D290mmを標準として、縦H×横Wを、例えば500×500、420×420等や、これらの半サイズである、305×305、250×250、210×210等のように縦H、横Wを設置場所などに応じて適宜調整することができる。また、奥行Dも例えば100〜610mmの範囲で、設置場所などに応じて適宜調整することができる。   The filter medium is mounted on a filter frame. The filter frame is not particularly limited as long as it is a rigid material, and wood, metal, plastic, and the like are applied, and wood is preferable in consideration of incineration and disposal after several washing and regeneration. Further, the outer dimensions of the filter frame are vertical H610 mm × horizontal W610 mm × depth D290 mm as standard, and vertical H × width W are, for example, 500 × 500, 420 × 420, and the like, and 305 × 305, The vertical H and horizontal W can be appropriately adjusted according to the installation location, such as 250 × 250, 210 × 210, and the like. Also, the depth D can be adjusted as appropriate depending on the installation location, for example, in the range of 100 to 610 mm.

本発明によるエアフィルタユニットは、例えば比色法による粒子捕集平均効率が20〜99%であるエアフィルタユニットとして、或いは計数法による粒子捕集効率が90%以上のエアフィルタユニットとして好適に使用することができる。また、本発明によるエアフィルタユニットは、例えば風量が奥行290mmのもので70m3 /minを標準として、50〜90m3 /minの高風量で使用が可能である。 The air filter unit according to the present invention is suitably used, for example, as an air filter unit having a particle collection average efficiency of 20 to 99% by a colorimetric method, or as an air filter unit having a particle collection efficiency of 90% or more by a counting method. can do. In addition, the air filter unit according to the present invention can be used at a high air volume of 50 to 90 m 3 / min, for example, with an air volume of 290 mm in depth and 70 m 3 / min as a standard.

本発明のエアフィルタユニットによって、粉塵保持容量が大きく、濾過寿命が長く、廃棄処理の負担を軽減することやランニングコストをより低減することが可能であり、且つ風圧でひだの角度が広がり隣接するひだと付着してしまうという問題も発生しないエアフィルタユニットを提供することが可能となった。   With the air filter unit of the present invention, the dust holding capacity is large, the filtration life is long, the burden of disposal processing can be reduced, and the running cost can be further reduced. It has become possible to provide an air filter unit that does not cause the problem of adhering to pleats.

以下、本発明の実施例につき説明するが、これは発明の理解を容易とするための好適例に過ぎず、本発明はこれら実施例の内容に限定されるものではない。   Examples of the present invention will be described below, but these are only suitable examples for facilitating the understanding of the present invention, and the present invention is not limited to the contents of these examples.

(試験方法)
圧力損失試験、粉塵保持容量試験は、ASHRAE STANDARDの比色法を適用して行った。なお、測定風量は70m3 /min、最終圧力損失は617Paとした。
(Test method)
The pressure loss test and the dust holding capacity test were performed by applying the colorimetric method of ASHRAE STANDARD. The measurement air volume was 70 m 3 / min, and the final pressure loss was 617 Pa.

(実施例1〜4、比較例1〜3)
実施例1〜4及び比較例1〜3の濾材として、平均繊維径が3μmのポリプロピレン樹脂からなるメルトブロー不織布と、平均繊維径が17μmのポリエステル繊維を主体として繊維間を塩ビ系接着剤で固定した乾式法不織布からなる補強用の不織布とを積層した複合不織布を使用した。また、フィルタ枠として合板ベニヤ板(厚さ8mm)で、外形寸法 H610mm×W610mm×D290mmを用いた。また、実施例1の形態を図1に示す。図1において、(a)はエアフィルタユニットの平面図であり、(b)はエアフィルタユニットの空気流入面から見た正面図である。また、比較例1の形態を図3に示す。
(Examples 1-4, Comparative Examples 1-3)
As filter media of Examples 1 to 4 and Comparative Examples 1 to 3, a melt blown nonwoven fabric made of polypropylene resin having an average fiber diameter of 3 μm and polyester fibers having an average fiber diameter of 17 μm were mainly used to fix the fibers with a vinyl chloride adhesive. A composite nonwoven fabric laminated with a reinforcing nonwoven fabric made of a dry process nonwoven fabric was used. Further, a plywood veneer plate (thickness 8 mm) was used as the filter frame, and the external dimensions H610 mm × W610 mm × D290 mm were used. Moreover, the form of Example 1 is shown in FIG. 1A is a plan view of an air filter unit, and FIG. 1B is a front view of the air filter unit as viewed from the air inflow surface. Moreover, the form of the comparative example 1 is shown in FIG.

試験結果を表1に示す。表1において、pはひだピッチ(mm)、hはひだ高さ(mm)、θはV字型の開き角度(度)を表す。また、エアフィルタユニット1個あたりの粉塵保持量を粉塵保持量(g/unit)で表わし、濾材1平方mあたりの粉塵保持量を粉塵保持量(g/m2 )で表す。また、開口率aは、{W−(h×n×2)}/W×100(n:V字型の山数)から算出した。また、評価は粉塵保持量が680g/unit以上のものを合格(○)とし、粉塵保持量が680g/unit未満のものを不合格(×)とした。 The test results are shown in Table 1. In Table 1, p represents a pleat pitch (mm), h represents a pleat height (mm), and θ represents a V-shaped opening angle (degrees). Further, the dust holding amount per air filter unit is represented by dust holding amount (g / unit), and the dust holding amount per square meter of filter medium is represented by dust holding amount (g / m 2 ). The aperture ratio a was calculated from {W− (h × n × 2)} / W × 100 (n: number of V-shaped peaks). In addition, in the evaluation, a dust holding amount of 680 g / unit or more was accepted (◯), and a dust holding amount of less than 680 g / unit was rejected (x).

表1

Figure 2006088048
Table 1
Figure 2006088048

表1の結果から明らかなように、実施例1〜4は、P/hの値が0.21〜0.35であり、且つ開口率aが40〜55%であるので、粉塵保持量が大きく、従って粉塵保持容量が大きく、濾過寿命が長いエアフィルタユニットとなっている。これに対して、比較例1〜3は、P/hの値が0.21〜0.35の範囲から外れるため、粉塵保持量が小さく、従って粉塵保持容量が小さく、濾過寿命が短く、本発明のエアフィルタユニットとして不適であった。   As is clear from the results in Table 1, in Examples 1 to 4, the value of P / h is 0.21 to 0.35, and the aperture ratio a is 40 to 55%. The air filter unit is large and therefore has a large dust holding capacity and a long filtration life. On the other hand, in Comparative Examples 1 to 3, since the value of P / h is out of the range of 0.21 to 0.35, the dust holding amount is small, so the dust holding capacity is small, and the filtration life is short. It was unsuitable as an air filter unit of the invention.

本発明のエアフィルタユニットの例(実施例1)を示す図であり、(a)は平面図であり、(b)は正面図である。It is a figure which shows the example (Example 1) of the air filter unit of this invention, (a) is a top view, (b) is a front view. 濾材の要部拡大図である。It is a principal part enlarged view of a filter medium. 従来のエアフィルタユニット(比較例1)の平面図である。It is a top view of the conventional air filter unit (comparative example 1). 従来の別のエアフィルタユニットの平面図である。It is a top view of another conventional air filter unit.

符号の説明Explanation of symbols

10 エアフィルタユニット
11 ひだ
12 濾材の表面(折り角度180度の面)
13 フィルタ枠
10 air filter unit 11 pleat 12 surface of filter medium (surface with folding angle of 180 degrees)
13 Filter frame

Claims (2)

多数のひだと、前記ひだのうち一定数ごとのひだの折り角度を180度とすることによって形成された単数のV字型又は複数連結したV字型とを有するダブルプリーツ型の濾材をフィルタ枠に装着してなるエアフィルタユニットであって、前記ひだのピッチP(mm)及び高さh(mm)(h:8〜30)との比P/hが0.21〜0.35であり、前記エアフィルタユニットの空気入口面において前記濾材の表面(折り角度180度の面)が前記空気入口面に対して略平行になっており、{W−(h×n×2)}/W×100から算出した開口率aが40〜55%であることを特徴とするエアフィルタユニット。
式中 W:フィルタ枠の横巾(mm)
n:ダブルプリーツ型濾材の山数(V字型の数)
A double pleat type filter medium having a large number of pleats and a single V-shape or a plurality of connected V-shapes formed by setting a fold angle of each pleat among the pleats to 180 degrees. The air filter unit is mounted on the pleat, and the ratio P / h of the pleat pitch P (mm) and the height h (mm) (h: 8 to 30) is 0.21 to 0.35. In the air inlet surface of the air filter unit, the surface of the filter medium (surface having a folding angle of 180 degrees) is substantially parallel to the air inlet surface, {W− (h × n × 2)} / W An air filter unit having an aperture ratio a calculated from x100 of 40 to 55%.
In formula, W: width of filter frame (mm)
n: Number of pleated filter media (number of V-shaped)
前記V字型の開き角度θが5〜10度であることを特徴とするエアフィルタユニット。
The air filter unit, wherein the V-shaped opening angle θ is 5 to 10 degrees.
JP2004277320A 2004-09-24 2004-09-24 Air filter unit Expired - Fee Related JP4699728B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010137085A1 (en) * 2009-05-29 2010-12-02 日本無機株式会社 Filter element and double-pleated air filter using same
CN106369678A (en) * 2016-10-11 2017-02-01 苏州艾尔新净化科技有限公司 Intelligent air purification system for guest room

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6179620U (en) * 1985-10-24 1986-05-27
JPH11197423A (en) * 1998-01-08 1999-07-27 Japan Vilene Co Ltd Filter unit
JP2002095922A (en) * 2000-09-26 2002-04-02 Kanai Hiroaki Air filter unit for air conditioning
WO2003043717A1 (en) * 2001-11-21 2003-05-30 Mitsubishi Heavy Industries, Ltd. Dust collecting filter, dust collecting device, and intake device of gas turbine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6179620U (en) * 1985-10-24 1986-05-27
JPH11197423A (en) * 1998-01-08 1999-07-27 Japan Vilene Co Ltd Filter unit
JP2002095922A (en) * 2000-09-26 2002-04-02 Kanai Hiroaki Air filter unit for air conditioning
WO2003043717A1 (en) * 2001-11-21 2003-05-30 Mitsubishi Heavy Industries, Ltd. Dust collecting filter, dust collecting device, and intake device of gas turbine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010137085A1 (en) * 2009-05-29 2010-12-02 日本無機株式会社 Filter element and double-pleated air filter using same
CN106369678A (en) * 2016-10-11 2017-02-01 苏州艾尔新净化科技有限公司 Intelligent air purification system for guest room

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