JP5602521B2 - Air filter insert - Google Patents

Air filter insert Download PDF

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JP5602521B2
JP5602521B2 JP2010151874A JP2010151874A JP5602521B2 JP 5602521 B2 JP5602521 B2 JP 5602521B2 JP 2010151874 A JP2010151874 A JP 2010151874A JP 2010151874 A JP2010151874 A JP 2010151874A JP 5602521 B2 JP5602521 B2 JP 5602521B2
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air filter
filter insert
protrusion
insert according
protrusions
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JP2012011345A (en
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雅彦 永田
義哉 佐野
晃利 柳本
薇 季
敬造 奥井
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Nitta Corp
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Nitta Corp
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Priority to JP2010151874A priority Critical patent/JP5602521B2/en
Application filed by Nitta Corp filed Critical Nitta Corp
Priority to MYPI2012005615A priority patent/MY157537A/en
Priority to CN201180032699.4A priority patent/CN102958582B/en
Priority to KR1020127033774A priority patent/KR101803855B1/en
Priority to SG2012096376A priority patent/SG186482A1/en
Priority to PCT/JP2011/064008 priority patent/WO2012002187A1/en
Priority to TW100122667A priority patent/TWI520767B/en
Publication of JP2012011345A publication Critical patent/JP2012011345A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
    • B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
    • B01D46/523—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material with means for maintaining spacing between the pleats or folds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces

Description

本発明は、ビル空調、産業空調等の用途で、空気中の微粒子を捕集するために使用されるエアフィルタ挿入体に関し、特に濾材シートがひだ状に折られてブロック状にされたエアフィルタ挿入体に関する。   The present invention relates to an air filter insert used for collecting particulates in the air in applications such as building air conditioning and industrial air conditioning, and more particularly, an air filter in which a filter medium sheet is folded into a block shape. Regarding the insert.

従来、空気中の塵埃や汚染物質を除去するために、濾材シートがひだ折りに折られたエアフィルタ挿入体が、フィルタ枠内部に収納されたエアフィルタが広く使用されている。エアフィルタ挿入体は一般的に、折り畳まれた濾材シート間の間隔を保持するセパレータが設けられ、通風が確保されている。   Conventionally, in order to remove dust and contaminants in the air, an air filter in which an air filter insert in which a filter sheet is folded in a fold is housed in a filter frame has been widely used. In general, the air filter insert is provided with a separator for maintaining a space between the folded filter media sheets, and ventilation is ensured.

例えば、エンボス加工によって濾材シートに成形された突出部が、セパレータとして使用されることがある。エンボス加工による突出部は、隣接する濾材シート間に設けられたものが互いに近づくように突出し、その先端面同士が突き合わされ、多くの場合、それらが接着剤によって接着されてシート間の間隔が保持される。   For example, a protrusion formed on a filter medium sheet by embossing may be used as a separator. The embossed protrusions protrude so that the ones provided between adjacent filter media sheets are close to each other, and their tip surfaces are abutted with each other. In many cases, they are bonded by an adhesive to maintain the spacing between the sheets. Is done.

特許第２９３５４３２号公報Japanese Patent No. 2935432 特許第２９３５４３３号公報Japanese Patent No. 2935433

ところで、濾材シートは、エンボス加工が施される場合、エンボス成形による延伸が考慮されて設計される。すなわち濾材シートは、エンボス加工によって延伸されて薄くなったとしても、要求される最低限の濾過性能が確保できるような厚さや目付け（単位面積当たりの重量）を有するように設計される。   By the way, the filter medium sheet is designed in consideration of stretching by embossing when embossing is performed. That is, the filter medium sheet is designed to have a thickness and basis weight (weight per unit area) that can ensure the required minimum filtration performance even if the filter sheet is thinned by embossing.

しかし、このような設計は、エンボス加工によって延伸されない部分を過剰に厚くするため、過剰な濾過性能をフィルタに与えて圧力損失を大きくし、フィルタ性能を損なうことがある。また、フィルタ性能を向上させるためには、濾材の有効濾過面積を大きくすることが考えられるが、簡単な方法で濾材の有効濾過面積を大きくする方法は、従来見出されていない。   However, since such a design excessively thickens the portion that is not stretched by embossing, it may give excessive filtration performance to the filter to increase pressure loss and impair the filter performance. In order to improve the filter performance, it is conceivable to increase the effective filtration area of the filter medium. However, a method for increasing the effective filtration area of the filter medium by a simple method has not been found so far.

本発明は、以上の問題点に鑑みてなされたものであり、簡単な方法で濾材の圧力損失を低く抑えつつ、濾材の有効濾過面積を向上させて、良好なフィルタ性能を有するエアフィルタ挿入体を提供することを目的とする。   The present invention has been made in view of the above problems, and an air filter insert having good filter performance by improving the effective filtration area of the filter medium while keeping the pressure loss of the filter medium low by a simple method. The purpose is to provide.

本発明に係るエアフィルタ挿入体は、濾材シートがひだ状に折られて、ブロック状の構造を有し、空気を濾過するためのエアフィルタ挿入体において、濾材シートは折られることにより複数の折り壁が形成され、折り壁それぞれにエンボス加工によって成形された第１の突出部と第２の突出部とが折目方向に並べられ、隣接する一対の折り壁に設けられた第１の突出部は互いに近づくように突出し、先端同士が突き合わされるとともに、第２の突出部は互いに突き合わされないように突出することを特徴とする。   An air filter insert according to the present invention has a block-like structure in which a filter medium sheet is folded in a pleated shape. In the air filter insert for filtering air, the filter medium sheet is folded into multiple folds. A first protrusion provided on a pair of adjacent folding walls, in which walls are formed, and first and second protrusions formed by embossing on each of the folding walls are arranged in the crease direction Are projected so as to be close to each other, the tips are butted against each other, and the second projecting portions are projected so as not to be butted against each other.

第２の突出部は、互いに折目方向における同一位置に配置され、かつ同一方向に突出することが好ましい。この場合、折り壁それぞれに設けられた第２の突出部それぞれはその一部が、その折り壁に隣接する折り壁に設けられた第２の突出部の内部に配置されたほうがさらに好ましい。また、第２の突出部は、一方向に突出するものと、その反対方向に突出するものが、折目方向において交互に並べられたほうが良い。なお、第２の突出部は、互いに接触しないように突出していたほうが良い。   It is preferable that the second projecting portions are arranged at the same position in the crease direction and project in the same direction. In this case, it is more preferable that a part of each of the second protrusions provided on each of the folding walls is disposed inside the second protrusion provided on the folding wall adjacent to the folding wall. In addition, it is preferable that the second projecting portions are alternately arranged in the crease direction so that the one projecting in one direction and the second projecting portion projecting in the opposite direction. The second protrusions should protrude so as not to contact each other.

第２の突出部の突出高さは、その長手方向に沿って略一定であったほうが良い。また、第２の突出部の先端面は、折り壁に平行な平面であったほうが良い。第２の突出部は、各折り壁において、折目に対して垂直に延びる形状を有することが好ましい。また、第２の突出部は、その横断面形状及び縦断面形状の一方、好ましくは両方が台形である。   The protrusion height of the second protrusion is preferably substantially constant along the longitudinal direction. Further, the tip surface of the second projecting portion should be a plane parallel to the folding wall. It is preferable that a 2nd protrusion part has a shape extended perpendicularly | vertically with respect to a fold in each folding wall. In addition, the second projecting portion has a trapezoidal shape, preferably one of the transverse sectional shape and the longitudinal sectional shape thereof.

第１の突出部は、例えば、第２の突出部と同様に、各折り壁において、折目に対して垂直に延びるが、その突出高さは、長手方向に沿って増大することが好ましい。第１及び第２の突出部は、例えば折目方向に交互に並べられる。   The first protrusion extends, for example, in the same manner as the second protrusion, in each fold wall, perpendicular to the fold, but the protrusion height preferably increases along the longitudinal direction. The first and second protrusions are arranged alternately in the fold direction, for example.

本発明では、第２の突出部を設けたことにより、エアフィルタ挿入体において、簡単な方法で圧力損失を低く抑えつつ、濾材の有効濾過面積を向上させることができる。   In the present invention, by providing the second protrusion, it is possible to improve the effective filtration area of the filter medium while keeping the pressure loss low by a simple method in the air filter insert.

エアフィルタの全体図である。It is a general view of an air filter. ひだ折りする前の濾材シートを示す斜視図である。It is a perspective view which shows the filter material sheet before folding. エアフィルタ挿入体を拡大して示す斜視図である。It is a perspective view which expands and shows an air filter insertion body. 図３におけるIV−IV矢視断面図である。FIG. 4 is a cross-sectional view taken along arrow IV-IV in FIG. 3. 図３におけるＶ−Ｖ矢視断面図である。It is a VV arrow sectional view in FIG. 第１の突出部を省略したエアフィルタ挿入体を示す側面図である。It is a side view which shows the air filter insertion body which abbreviate | omitted the 1st protrusion part.

以下図面を参照しつつ、本発明の実施形態を説明する。
図１は、本発明の一実施形態に係るエアフィルタを示す斜視図である。
エアフィルタ１０は、空気を濾過するためのエアフィルタ挿入体１２と、エアフィルタ挿入体１２を保持するためのエアフィルタ枠１１とを備え、エアフィルタ挿入体１２がエアフィルタ枠１１の内部に挿入されて構成される。エアフィルタ枠１１は、木材、アルミニウム等の金属等で四角枠状に形成される。エアフィルタ挿入体１２は、濾材シート１３がひだ状に折られてブロック状にされたものである。 Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view showing an air filter according to an embodiment of the present invention.
The air filter 10 includes an air filter insert 12 for filtering air and an air filter frame 11 for holding the air filter insert 12. The air filter insert 12 is inserted into the air filter frame 11. Configured. The air filter frame 11 is formed in a square frame shape using a metal such as wood or aluminum. The air filter insert 12 is obtained by folding a filter sheet 13 into a block shape.

次に、エアフィルタ挿入体１２の構造についてさらに詳細に説明する。図２に示すように、濾材シート１３は、シート１３の幅方向に沿って延びる折目Ｓに沿って、一定の折り高さでひだ状（ジグザグ）に折られる。エアフィルタ挿入体１２は、図３に示すように、濾材シート１３がひだ状に折られることにより、平面状の折り壁１４が多数重ねられた構造となる。なお、以下の説明においては、折り壁１４が重ねられた方向をＸ方向とする。また、図３に示すように、エアフィルタ挿入体１２では、濾材シート１３の表面１３Ａから裏面１３Ｂ側に空気が通過される。すなわち通風方向は、図３における上側から下側となる。   Next, the structure of the air filter insert 12 will be described in more detail. As shown in FIG. 2, the filter medium sheet 13 is folded in a pleat shape (zigzag) at a constant folding height along the fold S extending along the width direction of the sheet 13. As shown in FIG. 3, the air filter insert 12 has a structure in which a large number of planar folding walls 14 are stacked by folding the filter medium sheet 13 into a pleat shape. In the following description, the direction in which the folding walls 14 are overlapped is defined as the X direction. As shown in FIG. 3, in the air filter insert 12, air passes from the front surface 13 </ b> A to the back surface 13 </ b> B side of the filter medium sheet 13. That is, the ventilation direction is from the upper side to the lower side in FIG.

濾材シート１３は、空気中の浮遊粒子を濾過し、エアフィルタ挿入体１２に成形可能なものであれば、いかなるフィルタ材料であっても良い。例えば濾材シート１３としては、ガラス繊維からなる濾紙や、ポリオレフィン系、ポリエステル系の不織布が使用されるが、濾過性能を満足する濾材シートであれば特にこれらに限定されない。   The filter medium sheet 13 may be any filter material as long as it can filter suspended particles in the air and can be molded into the air filter insert 12. For example, filter paper made of glass fiber, polyolefin-based, or polyester-based non-woven fabric is used as the filter media sheet 13, but is not particularly limited as long as it is a filter media sheet that satisfies the filtration performance.

濾材シート１３には、エンボス加工によって成形された多数の第１及び第２の突出部２１、２２が設けられる。濾材シート１３は例えば、凹凸が外周面に設けられた２つのローラ間に長手方向に送られ、それらローラ間でエンボス加工される。図２に示すように、第１及び第２の突出部２１、２２は、シート１３の一面側（表面１３Ａ又は裏面１３Ｂ側）から凹まされて他面側（裏面１３Ｂ又は表面１３Ａ側）に突出する。   The filter medium sheet 13 is provided with a number of first and second protrusions 21 and 22 formed by embossing. The filter medium sheet 13 is, for example, sent in the longitudinal direction between two rollers provided with irregularities on the outer peripheral surface, and is embossed between these rollers. As shown in FIG. 2, the first and second projecting portions 21 and 22 are recessed from one surface side (the front surface 13A or the back surface 13B side) of the sheet 13 and project to the other surface side (the back surface 13B or the front surface 13A side). To do.

第１の突出部２１と、第２の突出部２２とは、各折り壁１４において、折目方向（シート１３の幅方向）に沿って交互に並べられる。第１の突出部２１の折目方向における間隔は、２５〜７５ｍｍであることが好ましく、５０ｍｍ程度であることがさらに好ましい。第２の突出部２２の折目方向における間隔も同様に、２５〜７５ｍｍであることが好ましく、５０ｍｍ程度であることがさらに好ましい。   The first protrusions 21 and the second protrusions 22 are alternately arranged along the fold direction (the width direction of the sheet 13) in each fold wall 14. The interval in the fold direction of the first protrusion 21 is preferably 25 to 75 mm, and more preferably about 50 mm. Similarly, the interval in the crease direction of the second protrusion 22 is preferably 25 to 75 mm, and more preferably about 50 mm.

各折り壁１４に設けられた第１及び第２の突出部２１、２２それぞれは、他の折り壁１４に設けられた第１及び第２の突出部２１、２２と、折目方向において同一位置に配置される。すなわち、濾材シート１３においては、図２に示すように、シート１３の長手方向に一列に並べられた第１の突出部２１と、第２の突出部２２が、折目方向に交互に並べられる。   Each of the first and second protrusions 21 and 22 provided on each folding wall 14 is in the same position as the first and second protrusions 21 and 22 provided on the other folding wall 14 in the fold direction. Placed in. That is, in the filter medium sheet 13, as shown in FIG. 2, the first protrusions 21 and the second protrusions 22 arranged in a line in the longitudinal direction of the sheet 13 are alternately arranged in the crease direction. .

第１の突出部２１は、各折り壁１４において、表面１３Ａ側及び裏面１３Ｂ側に交互に突出するように、折目方向に複数並べられる。折目方向において同一位置に設けられた（すなわち、シート１３の長手方向に並ぶ）複数の第１の突出部２１は、濾材シート１３の同一面側（表面１３Ａ側又は裏面１３Ｂ側）に突出する。そのため、折目方向において同一位置に設けられた複数の第１の突出部２１は、図３に示すようにひだ状に折られたとき、Ｘ方向に沿う一方向とその反対方向に交互に突出する。   A plurality of first protruding portions 21 are arranged in the fold direction so as to alternately protrude on the front surface 13A side and the back surface 13B side in each folding wall 14. The plurality of first protrusions 21 provided at the same position in the fold direction (that is, arranged in the longitudinal direction of the sheet 13) protrudes on the same surface side (the front surface 13A side or the back surface 13B side) of the filter material sheet 13. . Therefore, the plurality of first projecting portions 21 provided at the same position in the fold direction alternately project in one direction along the X direction and the opposite direction when folded in a pleat shape as shown in FIG. To do.

このような構造により、第１の突出部２１は、隣接する一対の折り壁１４、１４において、互いに近づくように突出し、その先端面２１Ａ、２１Ａ同士が突き合わされる。突き合わされた先端面２１Ａ、２１Ａは、それらの間に塗布された接着剤（不図示）によって固定され、これにより、隣接する折り壁１４、１４間が離間されて保持される。なお、表面１３Ａ側に突出した第１の突出部２１は折り壁１４、１４の表面１３Ａ、１３Ａ間を、裏面１３Ｂ側に突出した第１の突出部２１は折り壁１４、１４の裏面１３Ｂ、１３Ｂ間を離間させて保持する。   With such a structure, the first projecting portion 21 projects so as to approach each other in the pair of adjacent folding walls 14 and 14, and the front end surfaces 21 </ b> A and 21 </ b> A are abutted with each other. The abutted tip surfaces 21A and 21A are fixed by an adhesive (not shown) applied therebetween, whereby the adjacent folded walls 14 and 14 are held apart. In addition, the 1st protrusion part 21 which protruded to the surface 13A side is between the surfaces 13A and 13A of the folding walls 14 and 14, and the 1st protrusion part 21 which protruded to the back surface 13B side is the back surface 13B of the folding walls 14 and 14. 13B is held apart.

折目方向において同一位置に配置された（すなわち、シート１３の長手方向に並ぶ）複数の第２の突出部２２は、シート１３の長手方向に沿って、表面１３Ａ側、裏面１３Ｂ側に交互に突出する。そのため、折目方向において同一位置に配置された第２の突出部２２は、ひだ状に折られたとき、Ｘ方向に沿う同一方向に突出することとなり、エアフィルタ挿入体１２において、互いに突き合わされない。   The plurality of second protrusions 22 arranged at the same position in the fold direction (that is, arranged in the longitudinal direction of the sheet 13) are alternately arranged on the front surface 13A side and the back surface 13B side along the longitudinal direction of the sheet 13. Protruding. Therefore, the second protrusions 22 arranged at the same position in the crease direction protrude in the same direction along the X direction when folded in a pleat shape, and are abutted against each other in the air filter insert 12. Absent.

第２の突出部２２は、第１の突出部２１と同様に、各折り壁１４において、表面１３Ａ側及び裏面１３Ｂ側に交互に突出するように、折目方向に複数並べられる。したがって、図３に示すように、エアフィルタ挿入体１２において、第２の突出部２２は、Ｘ方向に沿う一方向に突出するものと、その反対方向に突出するものとが、折目方向において交互に並べられる。   Similar to the first protrusion 21, a plurality of the second protrusions 22 are arranged in the fold direction so as to protrude alternately on the front surface 13 </ b> A side and the back surface 13 </ b> B side on each folding wall 14. Therefore, as shown in FIG. 3, in the air filter insert 12, the second projecting portion 22 projects in one direction along the X direction and in the opposite direction. They are arranged alternately.

第１及び第２の突出部２１、２２は、各折り壁１４において折目Ｓに対して垂直に延びる形状を有する。すなわち、突出部２１、２２は、濾材シート１３の長手方向に延在し、かつエアフィルタ挿入体１２において通風方向に対して僅かに傾いて延在する。     The first and second protrusions 21 and 22 have a shape that extends perpendicularly to the fold S in each fold wall 14. That is, the protrusions 21 and 22 extend in the longitudinal direction of the filter medium sheet 13 and extend slightly inclined with respect to the ventilation direction in the air filter insert 12.

第１の突出部２１は、隣接する第１の突出部２１に折目Ｓにおいて接続し、シート１３の長手方向において連続して複数並べられる。すなわち、第１の突出部２１の長さは、折り壁１４の幅（すなわち、折り高さ）と同一になる。一方、第２の突出部２２は、折目Ｓ近傍には成形されず、隣接する第２の突出部２２に折目Ｓにおいて接続しない。すなわち、第２の突出部２２は、シート１３の長手方向において不連続に複数並べられ、第２の突出部２２の長さは、折り高さの１／２〜２／３となる。   The first protrusions 21 are connected to the adjacent first protrusions 21 at the creases S, and a plurality of the first protrusions 21 are continuously arranged in the longitudinal direction of the sheet 13. That is, the length of the first protrusion 21 is the same as the width of the folding wall 14 (that is, the folding height). On the other hand, the second protrusion 22 is not formed near the fold S and is not connected to the adjacent second protrusion 22 at the fold S. That is, a plurality of the second protrusions 22 are arranged discontinuously in the longitudinal direction of the sheet 13, and the length of the second protrusions 22 is 1/2 to 2/3 of the folding height.

第１の突出部２１は、その長手方向に沿って突出高さが増大する。ここで、表面１３Ａ側に突出した第１の突出部２１は、通風方向に沿って漸次高さが減少するとともに、裏面１３Ｂ側に突出した第１の突出部２１は、通風方向に沿って漸次高さが増大する。したがって、隣接する折り壁１４、１４の表面１３Ａ、１３Ａ間の距離は、通風方向に沿って漸次短くなる一方、裏面１３Ｂ、１３Ｂ間の距離は、通風方向に沿って漸次長くなる。   The protrusion height of the first protrusion 21 increases along the longitudinal direction. Here, the first protrusion 21 protruding toward the front surface 13A gradually decreases in height along the ventilation direction, and the first protrusion 21 protruding toward the back surface 13B gradually increases along the ventilation direction. Height increases. Therefore, the distance between the front surfaces 13A and 13A of the adjacent folded walls 14 and 14 gradually decreases along the ventilation direction, while the distance between the rear surfaces 13B and 13B gradually increases along the ventilation direction.

第１の突出部２１は、図４、５に示すようにその横断面の形状が、台形形状を呈しており、基端から先端に向かって、その幅が漸次小さくなるとともに、その先端面２１Ａは平面となる。なお、第１の突出部２１の基端における幅は、突出部２１の長手方向において略一定となる。   As shown in FIGS. 4 and 5, the first projecting portion 21 has a trapezoidal cross-sectional shape, and its width gradually decreases from the proximal end toward the distal end. Becomes a plane. Note that the width at the base end of the first protrusion 21 is substantially constant in the longitudinal direction of the protrusion 21.

一方、第２の突出部２２は、図４〜６に示すように、その横断面及び縦断面の形状が台形形状を呈し、基端から先端に向かって、その幅及び長さが漸次小さくなるとともに、先端面２２Ａは、折り壁１４に平行な平面となる。なお、第２の突出部２２の幅（例えば、先端および基端の幅）は、突出部２２の長手方向において略一定である。突出部２２の基端における幅は、５〜１５ｍｍであることが好ましく、１０ｍｍ程度であることがさらに好ましい。   On the other hand, as shown in FIGS. 4 to 6, the second protrusion 22 has a trapezoidal shape in cross section and vertical section, and the width and length gradually decrease from the base end to the tip. At the same time, the tip surface 22A is a plane parallel to the folding wall 14. Note that the width of the second protrusion 22 (for example, the width of the distal end and the base end) is substantially constant in the longitudinal direction of the protrusion 22. The width at the base end of the protruding portion 22 is preferably 5 to 15 mm, and more preferably about 10 mm.

さらに第２の突出部２２の突出高さは、折目Ｓに垂直な方向において一定である。第２の突出部２２の突出高さは、第１の突出部２１の最も高い部分の高さと、最も低い部分の高さの間の高さであって、具体的には３〜５ｍｍ程度であることが好ましい。高さが３ｍｍ未満の場合、エアフィルタ挿入体１２の濾過面積を十分に大きくできず、５ｍｍより高いとエンボス加工時に濾材シートが破損されるおそれがあるからである。   Furthermore, the protrusion height of the second protrusion 22 is constant in the direction perpendicular to the fold S. The protrusion height of the second protrusion 22 is a height between the height of the highest portion of the first protrusion 21 and the height of the lowest portion, specifically about 3 to 5 mm. Preferably there is. This is because if the height is less than 3 mm, the filtration area of the air filter insert 12 cannot be sufficiently increased, and if it is higher than 5 mm, the filter medium sheet may be damaged during embossing.

第２の突出部２２は、その突出高さが一定であるため、折目Ｓ近傍において、その先端側が、図５に示すように上方から見ると、折目Ｓを超えて配置されることとなる。ここで、折目方向において同一位置に配置された複数の第２の突出部２２は、上記したように、Ｘ方向において同じ方向に突出するとともに、第２の突出部２２の先端側は、その幅及び長さが基端側より小さい。そのため、図５、６に示すように、折目Ｓを超えた第２の突出部２２の先端側は、その一部が、隣接する第２の突出部２２の基端側の内部（凹部内部）に収まり、第２の突出部２２同士が接触することはない。なお、図６に示すように、本実施形態では、折目方向において同一位置に配置された複数の第２の突出部２２は、その長手方向における一端が他の突出部２２の他端の内部に配置されるとともに、他端の内部に他の突出部２２の一端が配置され、これが繰り返された構造となる。   Since the protrusion height of the second protrusion 22 is constant, the distal end side of the second protrusion 22 is disposed beyond the fold S when viewed from above as shown in FIG. Become. Here, as described above, the plurality of second protrusions 22 arranged at the same position in the crease direction protrude in the same direction in the X direction, and the tip side of the second protrusion 22 is The width and length are smaller than the proximal side. Therefore, as shown in FIGS. 5 and 6, a part of the distal end side of the second protrusion 22 beyond the crease S is partly inside the proximal end of the adjacent second protrusion 22 (inside the recess). ) And the second protrusions 22 do not come into contact with each other. As shown in FIG. 6, in the present embodiment, the plurality of second protrusions 22 arranged at the same position in the crease direction has one end in the longitudinal direction inside the other end of the other protrusion 22. And one end of the other protrusion 22 is arranged inside the other end, and this is repeated.

以上のように、本実施形態では、セパレータである第１の突出部２１の間の部分が、エンボス加工によって第２の突出部２２に成形されたため、エアフィルタ挿入体１２の面積を増大させることができる。第２の突出部２２は、他の突出部に突き合わされたり、接触したりすることがないので、第２の突出部２２によって増大した面積は、そのまま有効濾過面積の増大分となり、有効濾過面積を効率的に向上させることができる。そして、第２の突出部２２が設けられた部分は、厚さが薄くなり濾過性能が適正なものとなるので、エアフィルタ挿入体１２の圧力損失も抑えることが可能である。   As mentioned above, in this embodiment, since the part between the 1st protrusion parts 21 which are separators was shape | molded by the 2nd protrusion part 22 by embossing, the area of the air filter insert 12 is increased. Can do. Since the 2nd protrusion part 22 is not faced | matched or contacted with another protrusion part, the area increased by the 2nd protrusion part 22 becomes an increase part of an effective filtration area as it is, and an effective filtration area Can be improved efficiently. And since the part in which the 2nd protrusion part 22 was provided becomes thin and the filtration performance becomes appropriate, it is also possible to suppress the pressure loss of the air filter insert 12.

本実施形態では、折目方向における同一位置に配置された第２の突出部２２は、同一方向に突出するとともに、第２の突出部２２それぞれの一部は、他の第２の突出部２２の内部に配置される。そのため、第２の突出部２２それぞれの突出高さを比較的大きくすることが可能になり、有効濾過面積を増加させやすくなる。また、第２の突出部２２は、先端面２２Ａが平面で、かつ横断面及び縦断面が台形であるので、濾材面積を効率的に向上させつつ、各折り壁１４の剛性も向上させることができる。さらに、第２の突出部２２は、その長手方向において幅及び高さが略一定であるので、通風方向に風を通しやすくなる。   In the present embodiment, the second protrusions 22 arranged at the same position in the fold direction protrude in the same direction, and a part of each of the second protrusions 22 is another second protrusion 22. Placed inside. Therefore, it becomes possible to make each protrusion height of the 2nd protrusion part 22 comparatively large, and it becomes easy to increase an effective filtration area. Moreover, since the front end surface 22A is flat and the second projecting portion 22 has a trapezoidal cross section and longitudinal section, it is possible to improve the rigidity of each folding wall 14 while efficiently improving the filter medium area. it can. Furthermore, since the second protrusion 22 has a substantially constant width and height in the longitudinal direction, it is easy to pass air in the ventilation direction.

また本実施形態では、第２の突出部２２は、Ｘ方向の一方向に向くものと、逆方向に向くものとが、折目方向において交互に並べられる。そのため、折り壁１４の剛性をさらに向上させることができるとともに、エアフィルタ挿入体１２に均等に風を通しやすくなる。   In the present embodiment, the second protrusions 22 are alternately arranged in the crease direction so that the second protrusions 22 face in one direction in the X direction and those in the opposite direction. Therefore, the rigidity of the folded wall 14 can be further improved, and air can be easily passed through the air filter insert 12.

１２ エアフィルタ挿入体
１３ 濾材シート
１４ 折り壁
２１ 第１の突出部
２２ 第２の突出部 12 Air Filter Insert 13 Filter Media Sheet 14 Folding Wall 21 First Projection 22 Second Projection

Claims (10)

濾材シートがひだ状に折られて、ブロック状の構造を有し、空気を濾過するためのエアフィルタ挿入体において、
前記濾材シートは折られることにより複数の折り壁が形成され、前記折り壁それぞれにエンボス加工によって成形された第１の突出部と第２の突出部とが折目方向に並べられ、
隣接する一対の前記折り壁に設けられた前記第１の突出部は、互いに近づく方向に突出し、先端同士が当接するとともに、
前記第２の突出部は、互いに突き合わされないように突出し、
前記第２の突出部は、互いに折目方向における同一位置に配置され、かつ同一方向に突出し、
前記折り壁それぞれに設けられた前記第２の突出部それぞれはその一部が、その折り壁に隣接する折り壁に設けられた前記第２の突出部の内部に配置されることを特徴とするエアフィルタ挿入体。 In the air filter insert for filtering the air, the filter medium sheet is folded in a pleated shape, has a block-like structure,
The filter sheet is folded to form a plurality of folded walls, and the first projecting portion and the second projecting portion formed by embossing on each of the folded walls are arranged in the crease direction,
Wherein provided on the adjacent pair of the folding wall first protrusion The rewritable abutment protrudes is leading ends toward each other,
The second projecting portion is projected so as not to abut each other,
The second protrusions are arranged at the same position in the crease direction and protrude in the same direction,
A part of each of the second protrusions provided on each of the folding walls is disposed inside the second protrusion provided on the folding wall adjacent to the folding wall. Air filter insert. 前記第２の突出部は、一方向に突出するものと、その反対方向に突出するものが、折目方向において交互に並べられることを特徴とする請求項１に記載のエアフィルタ挿入体。 2. The air filter insert according to claim 1 , wherein the second projecting portions are alternately arranged in the crease direction so that one projecting in one direction and one projecting in the opposite direction are arranged. 前記第２の突出部は、互いに接触しないように突出することを特徴とする請求項１に記載のエアフィルタ挿入体。   The air filter insert according to claim 1, wherein the second protrusions protrude so as not to contact each other. 前記第２の突出部は、各折り壁において、折目に対して垂直に延びる形状を有することを特徴とする請求項１に記載のエアフィルタ挿入体。   2. The air filter insert according to claim 1, wherein the second projecting portion has a shape extending perpendicularly to the fold in each folding wall. 前記第２の突出部は、その横断面形状及び縦断面形状の少なくとも一方が台形であることを特徴とする請求項４に記載のエアフィルタ挿入体。 5. The air filter insert according to claim 4 , wherein at least one of the cross-sectional shape and the vertical cross-sectional shape of the second projecting portion is a trapezoid. 前記第２の突出部は、その横断面形状及び縦断面形状のいずれもが台形であることを特徴とする請求項５に記載のエアフィルタ挿入体。 6. The air filter insert according to claim 5 , wherein the second projecting portion has a trapezoidal shape in both a cross-sectional shape and a vertical cross-sectional shape. 前記第２の突出部の突出高さが、その長手方向に沿って略一定であることを特徴とする請求項４に記載のエアフィルタ挿入体。 The air filter insert according to claim 4 , wherein a protruding height of the second protruding portion is substantially constant along a longitudinal direction thereof. 前記第２の突出部の先端面は、前記折り壁に平行な平面であることを特徴とする請求項１に記載のエアフィルタ挿入体。   2. The air filter insert according to claim 1, wherein a distal end surface of the second projecting portion is a plane parallel to the folding wall. 前記第１の突出部は、各折り壁において、折目に対して垂直に延び、かつその長手方向に沿って突出高さが増大することを特徴とする請求項１に記載のエアフィルタ挿入体。   2. The air filter insert according to claim 1, wherein the first projecting portion extends perpendicularly to the fold at each folding wall, and the projecting height increases along the longitudinal direction thereof. . 前記第１及び第２の突出部は、折目方向に交互に並べられることを特徴とする請求項１に記載のエアフィルタ挿入体。   The air filter insert according to claim 1, wherein the first and second protrusions are alternately arranged in a fold direction.
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