JP2020049433A - Filter frame and air filter - Google Patents

Filter frame and air filter Download PDF

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JP2020049433A
JP2020049433A JP2018181948A JP2018181948A JP2020049433A JP 2020049433 A JP2020049433 A JP 2020049433A JP 2018181948 A JP2018181948 A JP 2018181948A JP 2018181948 A JP2018181948 A JP 2018181948A JP 2020049433 A JP2020049433 A JP 2020049433A
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filter
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peripheral surface
inner peripheral
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JP7478507B2 (en
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竜巳 阪野
Tatsumi Sakano
竜巳 阪野
健太郎 茅嶋
Kentaro Kayashima
健太郎 茅嶋
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Nippon Muki Co Ltd
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Abstract

To provide a filter frame and an air filter which can reduce deterioration in sealability between the filter frame and a filter pack.SOLUTION: A filter fame 2 according to the invention, which is the filter frame 2 of an air filter 1 having a filter pack 70 fixed with a seal material to an inner peripheral surface of the filter frame 2, comprises: a frame material 20 that is assembled in a rectangular shape to surround the filter pack 70 and is arranged in a first direction orthogonal to air flow passing on the filter pack 70; and a frame material 40 arranged in a second direction orthogonal to the first direction, where at least either of the frame material 20 arranged in the first direction and the frame material 40 arranged in the second direction has a roughened peripheral surface.SELECTED DRAWING: Figure 1

Description

本発明は、フィルタ枠およびエアフィルタに関する。   The present invention relates to a filter frame and an air filter.

空調用のエアフィルタとして、複数の枠材を組み合わせたフィルタ枠に濾材を収納したものが知られている（例えば、特許文献１参照）。濾材とフィルタ枠との接触面は、シール材（接着材）により気密に接着されている。これにより、濾材とフィルタ枠との間の隙間をなくし、リークが生じることを防止している。   2. Description of the Related Art As an air filter for air conditioning, a filter in which a filter material is housed in a filter frame obtained by combining a plurality of frame materials is known (for example, see Patent Document 1). The contact surface between the filter medium and the filter frame is hermetically bonded by a sealing material (adhesive material). This eliminates a gap between the filter medium and the filter frame, thereby preventing a leak from occurring.

特開２０１８−５１５１０JP 2018-51510

シール材は、上方及び下方のフィルタ枠内の全面に亘って塗布され、濾材とフィルタ枠とをシールしている。しかし、平滑なフィルタ枠面にシール材を付けると接着力が低くなり、剥離する虞がある。また、エアフィルタに熱収縮が発生するような環境下で使用された場合、シール材とフィルタ枠との間の熱膨張係数の違いにより、シール材とフィルタ枠との境界が剥離し、エアフィルタのシール性が維持できない虞がある。   The sealing material is applied over the entire surface inside the upper and lower filter frames to seal the filter medium and the filter frame. However, if a sealing material is attached to the smooth filter frame surface, the adhesive strength is reduced, and there is a possibility that the filter material will be peeled off. Further, when the air filter is used in an environment in which heat shrinkage occurs, the boundary between the seal material and the filter frame is peeled off due to a difference in thermal expansion coefficient between the seal material and the filter frame, and the air filter is removed. May not be able to maintain the sealing performance of the device.

本発明はこのような事情を考慮してなされたもので、フィルタ枠およびフィルタパック間の気密性の低下を低減することができるフィルタ枠およびエアフィルタを提供することを目的とする。   The present invention has been made in view of such circumstances, and an object of the present invention is to provide a filter frame and an air filter that can reduce a decrease in airtightness between a filter frame and a filter pack.

本発明に係るフィルタ枠は、上述した課題を解決するために、フィルタパックをシール材によりフィルタ枠の内周面に固定したエアフィルタのフィルタ枠において、フィルタパックを囲むように矩形に組み合わされ、前記フィルタパックを通過する気流に直交する第一の方向に配置される枠材と、前記第一の方向に直交する第二の方向に配置される枠材を備え、前記第一の方向に配置される枠材および前記第二の方向に配置される枠材の少なくとも一方は、粗面化された内周面を有する。
また、本発明に係るエアフィルタは、上述した課題を解決するために、フィルタパックをシール材によりフィルタ枠の内周面に固定したエアフィルタのフィルタ枠において、
フィルタパックを囲むように矩形に組み合わされ、前記フィルタパックを通過する気流に直交する第一の方向に配置される枠材と、前記第一の方向に直交する第二の方向に配置される枠材を備え、前記第一の方向に配置される枠材および前記第二の方向に配置される枠材の少なくとも一方は、粗面化された内周面を有するフィルタ枠を備える。 The filter frame according to the present invention is, in order to solve the above-described problem, in a filter frame of an air filter in which the filter pack is fixed to the inner peripheral surface of the filter frame with a sealing material, is combined in a rectangular shape so as to surround the filter pack, A frame member arranged in a first direction orthogonal to an airflow passing through the filter pack, and a frame member arranged in a second direction orthogonal to the first direction, arranged in the first direction At least one of the frame material to be formed and the frame material arranged in the second direction has a roughened inner peripheral surface.
Further, the air filter according to the present invention, in order to solve the above-mentioned problems, in the filter frame of the air filter in which the filter pack is fixed to the inner peripheral surface of the filter frame with a sealing material,
A frame member combined in a rectangular shape so as to surround the filter pack and arranged in a first direction orthogonal to an airflow passing through the filter pack, and a frame arranged in a second direction orthogonal to the first direction At least one of the frame member arranged in the first direction and the frame member arranged in the second direction includes a filter frame having a roughened inner peripheral surface.

本発明に係るフィルタ枠およびエアフィルタにおいては、フィルタ枠およびフィルタパック間の気密性の低下を低減することができる。   In the filter frame and the air filter according to the present invention, a decrease in airtightness between the filter frame and the filter pack can be reduced.

本実施形態のエアフィルタを示す斜視図である。It is a perspective view showing the air filter of this embodiment. 図１に示すエアフィルタの一部を分解して示す分解斜視図である。FIG. 2 is an exploded perspective view showing a part of the air filter shown in FIG. 1 in an exploded manner. 図２の領域ＩＩＩの拡大図であり、枠材の凹凸形状の説明図である。FIG. 3 is an enlarged view of a region III in FIG. 2, and is an explanatory diagram of an uneven shape of a frame material. 本実施形態の接続部材を示す図であり、（ａ）は接続部材を内周面側から見た図であり、（ｂ）は接続部材を外周面側から見た図である。It is a figure which shows the connection member of this embodiment, (a) is the figure which looked at the connection member from the inner peripheral surface side, (b) is the figure which looked at the connection member from the outer peripheral surface side. 図４に示す接続部材を気流方向から見た図である。FIG. 5 is a view of the connecting member shown in FIG. 4 as viewed from an airflow direction. 本実施形態のエアフィルタの組立方法を説明する図である。It is a figure explaining the assembly method of the air filter of this embodiment.

本発明に係るフィルタ枠およびエアフィルタの一実施形態を図面に基づいて説明する。   An embodiment of a filter frame and an air filter according to the present invention will be described with reference to the drawings.

図１は、本発明の一実施形態に係るエアフィルタの斜視図である。本実施形態に係るエアフィルタ１は、フィルタパック７０と、フィルタパック７０を内部に収納する矩形のフィルタ枠２から構成される。   FIG. 1 is a perspective view of an air filter according to one embodiment of the present invention. The air filter 1 according to the present embodiment includes a filter pack 70 and a rectangular filter frame 2 that houses the filter pack 70 therein.

フィルタパック７０は、プリーツ加工された濾材５０を有している。濾材５０は、気体中の微粒子を捕集する、プリーツ加工された部材である。濾材５０には、例えば、ガラス繊維または樹脂繊維の繊維材料からなる不織布または織布が用いられる。濾材５０の具体例として、粒径０．３μｍの粒子に対する捕集効率が、９０〜９９．９９％であり、厚みが０．４〜０．９ｍｍである。このような濾材５０は、ＨＥＰＡフィルタ（粒径０．３μｍの粒子に対して９９．９７％以上の捕集効率を有し、かつ初期の圧力損失が２４５Ｐａ以下であるフィルタ）、あるいは、ＨＥＰＡに準じる性能のフィルタ（粒径０．３μｍの粒子に対して９０〜９９．９９％の捕集効率を有するフィルタ）として用いることができる。
濾材５０は、濾材シートを、山折りおよび谷折りを交互に繰り返し行うことによりジグザグ形状（Ｖ字が連続した形状）に形成されている。山折りおよび谷折りの折り目は、気流の上流側および下流側にそれぞれ表れる。特に制限されないが、フィルタパック７０の外寸は、例えば、縦（図１のＺ方向長さ）５８０ｍｍ×横（図１のＹ方向長さ）５８０ｍｍ×奥行き（図１のＸ方向長さ）５０〜２９０ｍｍである。フィルタパック７０のプリーツ間隔は２〜１０ｍｍ、折り幅は４０〜２６０ｍｍ、プリーツ数は６０〜２４０である。 The filter pack 70 has a pleated filter medium 50. The filter medium 50 is a pleated member that collects fine particles in a gas. As the filter medium 50, for example, a nonwoven fabric or a woven fabric made of a fiber material such as glass fiber or resin fiber is used. As a specific example of the filter medium 50, the collection efficiency for particles having a particle size of 0.3 μm is 90 to 99.99%, and the thickness is 0.4 to 0.9 mm. Such a filter medium 50 is used for a HEPA filter (a filter having a collection efficiency of 99.97% or more for particles having a particle diameter of 0.3 μm and an initial pressure loss of 245 Pa or less) or a HEPA filter. It can be used as a filter having a similar performance (a filter having a collection efficiency of 90 to 99.99% for particles having a particle diameter of 0.3 μm).
The filter medium 50 is formed in a zigzag shape (a shape in which a V-shape is continuous) by alternately repeating a mountain-fold and a valley-fold of the filter medium sheet. The folds of the mountain fold and the valley fold appear on the upstream side and the downstream side of the airflow, respectively. Although not particularly limited, the outer dimensions of the filter pack 70 are, for example, 580 mm (length in the Z direction in FIG. 1) × 580 mm (length in the Y direction in FIG. 1) × depth (length in the X direction in FIG. 1) 50. ２290 mm. The pleat spacing of the filter pack 70 is 2 to 10 mm, the folding width is 40 to 260 mm, and the number of pleats is 60 to 240.

フィルタパック７０は、さらに、プリーツ間隔の間隔保持材としてセパレータ６０を有していることが好ましい。セパレータ６０は、濾材５０の隣り合う２つのプリーツ（山折りされた山部）の間のスペースごとに配置された複数の部材である。セパレータ６０の材料としては、アルミニウム、ステンレス等の金属、あるいは紙が用いられる。セパレータ６０は、プリーツ同士の間隔（図１のＹ方向に沿った間隔）を保持する部材である。セパレータ６０は、波形状に折り曲げられて形成され、プリーツの折り目が延びる方向（図１のＺ方向）と略平行な方向に延びるよう配置されている。フィルタパック７０の第一の方向の両端には、濾材５０が位置していることが好ましい。また、間隔保持材はホットメルト、スタビライザ、濾材５０のエンボス加工などでも良い。   It is preferable that the filter pack 70 further has a separator 60 as a spacing material for the pleat spacing. The separator 60 is a plurality of members arranged for each space between two adjacent pleats (mountain-folded crests) of the filter medium 50. As a material of the separator 60, a metal such as aluminum or stainless steel, or paper is used. The separator 60 is a member that maintains an interval between pleats (an interval along the Y direction in FIG. 1). The separator 60 is formed by being bent in a wave shape, and is disposed so as to extend in a direction substantially parallel to the direction in which the pleated fold extends (the Z direction in FIG. 1). It is preferable that the filter media 50 be located at both ends of the filter pack 70 in the first direction. The spacing material may be a hot melt, a stabilizer, an embossing of the filter material 50, or the like.

フィルタ枠２は、矩形の各辺を構成する４つの枠材２０、４０および４つの接続部材３で形成される。枠材２０、４０は、フィルタパック７０に対して気流に直交する第一の方向（以下、図１、２および６のＹ方向をいう）に２つの枠材２０が対向して配置され、第一の方向に直交する第二の方向（以下、図１、２および６のＺ方向をいう）に２つの枠材４０が対向して配置されている。枠材２０、４０の詳細については、後述する。
接続部材３は、矩形の角部を形成し、第一の方向に配置される枠材（第一の枠材）２０と、第二の方向に配置される枠材（第二の枠材）４０を角部で接続する。接続部材３の詳細は、後述する。 The filter frame 2 is formed by four frame members 20 and 40 and four connection members 3 that constitute each side of the rectangle. The frame members 20 and 40 are arranged such that the two frame members 20 face each other in a first direction (hereinafter, referred to as a Y direction in FIGS. 1, 2 and 6) perpendicular to the airflow with respect to the filter pack 70. Two frame members 40 are arranged to face each other in a second direction orthogonal to one direction (hereinafter, referred to as a Z direction in FIGS. 1, 2, and 6). Details of the frame members 20 and 40 will be described later.
The connection member 3 forms a rectangular corner, and a frame member (first frame member) 20 arranged in the first direction and a frame member (second frame member) arranged in the second direction. 40 is connected at the corner. Details of the connection member 3 will be described later.

図２は、エアフィルタ１の一部を分解して示す分解斜視図である。枠材２０、４０は、枠板部２２、４２とカバー部２４、４４から構成される。   FIG. 2 is an exploded perspective view showing a part of the air filter 1 in an exploded manner. The frame members 20 and 40 include frame plate portions 22 and 42 and cover portions 24 and 44.

枠板部２２、４２は、図２に示す例において、Ｙ方向またはＺ方向に板状に延びる部分である。枠板部２２、４２の内周面はフィルタパック７０と当接し、外周面の一部は凸部３０と当接する。枠板部２２、４２の外周面には、接続部材３の凸部３０と接合するための凹部２１、４１が複数設けられる。第一の枠材２０の凹部２１は、Ｚ方向に窪み、気流方向（以下、図１、２および６のＸ方向をいう）に沿って複数設けられている。第二の枠材４０の凹部４１は、Ｙ方向に窪み、Ｘ方向に沿って複数設けられる。枠板部２２、４２に設けられる凹部２１、４１の数は、図２に示す例において４つであるが、その数は制限されない。   The frame plate portions 22 and 42 are portions extending in a plate shape in the Y direction or the Z direction in the example shown in FIG. The inner peripheral surfaces of the frame plate portions 22 and 42 are in contact with the filter pack 70, and a part of the outer peripheral surface is in contact with the projection 30. A plurality of concave portions 21 and 41 for joining with the convex portions 30 of the connecting member 3 are provided on the outer peripheral surfaces of the frame plate portions 22 and 42. The concave portions 21 of the first frame member 20 are depressed in the Z direction, and are provided in a plurality in the airflow direction (hereinafter, referred to as the X direction in FIGS. 1, 2 and 6). The concave portions 41 of the second frame member 40 are depressed in the Y direction and are provided in plurality along the X direction. Although the number of the concave portions 21 and 41 provided in the frame plate portions 22 and 42 is four in the example shown in FIG. 2, the number is not limited.

凹部２１、４１はフィルタ枠２の外周面側に開放されるため、凸部３０の位置を枠材２０、４０の特定の位置に正確に合わせる必要がない。これにより、例えば、接続部品と枠板を嵌合する場合に比べ、作業性がよく、エアフィルタ１の組み立てが容易になる。   Since the concave portions 21 and 41 are opened to the outer peripheral surface side of the filter frame 2, it is not necessary to exactly adjust the position of the convex portion 30 to a specific position of the frame members 20 and 40. Thereby, for example, the workability is better and the assembling of the air filter 1 becomes easier as compared with a case where the connection component and the frame plate are fitted.

また、枠板部２２、４２は、枠板部２２、４２からＹ方向またはＺ方向の外側に突出し、かつ、枠材２０、４０の長手方向に延びるリブ２３、４３を有する。図２に示す例において、リブ２３、４３は、３本設けられているが、その数は制限されず、凸部３０の数に応じて設けられる。枠材２０、４０は、その寸法、形状によっては、フィルタパック７０から力を受けることで、大きく変形する場合がある。これによって、フィルタパック７０と、枠材２０、４０との間に隙間があくと、リークが生じるおそれがある。エアフィルタ１では、枠板部２２、４２にリブ２３、４３が設けられていることで、枠材２０、４０の長手方向に対する曲げ剛性が高くなり、フィルタパック７０から力を受けても、枠材２０、４０の長手方向への変形量が大きくなりすぎない。   Further, the frame plate portions 22 and 42 have ribs 23 and 43 projecting outward in the Y direction or the Z direction from the frame plate portions 22 and 42 and extending in the longitudinal direction of the frame members 20 and 40. In the example shown in FIG. 2, three ribs 23 and 43 are provided, but the number is not limited, and the ribs 23 and 43 are provided according to the number of the protrusions 30. The frame members 20 and 40 may be greatly deformed by receiving a force from the filter pack 70 depending on their size and shape. Accordingly, if there is a gap between the filter pack 70 and the frame members 20 and 40, a leak may occur. In the air filter 1, since the ribs 23 and 43 are provided on the frame plate portions 22 and 42, the bending stiffness in the longitudinal direction of the frame members 20 and 40 is increased. The amount of deformation of the members 20 and 40 in the longitudinal direction does not become too large.

カバー部２４、４４は、枠板部２２、４２のＸ方向の両端に設けられ、断面形状は略Ｌ字型である。カバー部２４、４４は、枠板部２２、４２のＸ方向の両端からＺ方向またはＹ方向に向かって突出するガード部２５、４５を有する。ガード部２５は、シール材がフィルタ枠２の内周面に塗布されるとき、シール材がフィルタ枠２外に漏れ出すのを防止する。   The cover portions 24 and 44 are provided at both ends in the X direction of the frame plate portions 22 and 42, and have a substantially L-shaped cross section. The cover parts 24 and 44 have guard parts 25 and 45 that protrude from both ends in the X direction of the frame plate parts 22 and 42 in the Z direction or the Y direction. The guard portion 25 prevents the sealing material from leaking out of the filter frame 2 when the sealing material is applied to the inner peripheral surface of the filter frame 2.

枠材２０、４０のうち、フィルタパック７０の濾材５０のプリーツの折り目が延びる方向における両端と当接する枠材２０（第一の方向に配置される枠材）は、枠板部２２の内周面２２ａの全面に亘って、凹凸形状２６を有している。図３は、図２の領域ＩＩＩの拡大図であり、枠材２０の凹凸形状２６の説明図である。   Of the frame members 20 and 40, the frame member 20 (the frame member arranged in the first direction) that comes into contact with both ends in the direction in which the pleat fold of the filter member 50 of the filter pack 70 extends is the inner periphery of the frame plate portion 22. An uneven shape 26 is provided over the entire surface 22a. FIG. 3 is an enlarged view of the region III in FIG. 2 and is an explanatory diagram of the uneven shape 26 of the frame member 20.

凹凸形状２６は、線状に延びた複数条の凹部２６ａおよび凸部２６ｂからなる。凹凸形状２６は、濾材５０の奥行き方向（Ｘ方向）に沿って凹部２６ａおよび凸部２６ｂが交互に表れている。凹凸形状２６は、気流方向に直交する方向（Ｙ方向）に沿って、線状に延びている。凹凸形状２６は、例えば押出成形により形成される。凹部２６ａは、内周面２２ａ上に塗布されたシール材が確実に凹部２６ａに行き渡るよう、断面形状が略円弧状である。   The concavo-convex shape 26 includes a plurality of linearly extending concave portions 26a and convex portions 26b. In the uneven shape 26, the concave portions 26a and the convex portions 26b alternately appear along the depth direction (X direction) of the filter medium 50. The uneven shape 26 extends linearly along a direction (Y direction) orthogonal to the airflow direction. The uneven shape 26 is formed by, for example, extrusion molding. The concave portion 26a has a substantially arc-shaped cross section so that the sealing material applied on the inner peripheral surface 22a surely reaches the concave portion 26a.

接続部材３は、Ｙ方向およびＺ方向に突出し、枠材２０、４０の凹部２１、４１に挿入する複数の凸部３０を有している。凸部３０は、Ｙ方向またはＺ方向を向く面を有する板状の形状を有しており、Ｘ方向に沿って複数設けられる。接続部材３に設けられる凸部３０の数は、図２に示す例において４つであるが、その数は制限されない。また、凸部３０は、図２に示す例において、一定の曲率半径に沿った角部を有する形状に形成されているが、このような形状に制限されない。   The connection member 3 has a plurality of protrusions 30 that protrude in the Y and Z directions and are inserted into the recesses 21 and 41 of the frame members 20 and 40. The protrusion 30 has a plate-like shape having a surface facing the Y direction or the Z direction, and a plurality of protrusions 30 are provided along the X direction. Although the number of the protrusions 30 provided on the connection member 3 is four in the example shown in FIG. 2, the number is not limited. Further, in the example shown in FIG. 2, the convex portion 30 is formed in a shape having a corner along a constant radius of curvature, but is not limited to such a shape.

凸部３０は、接続部材３と枠材２０、４０とが接合される際に、枠板部２２、４２の凹部２１、４１に対してＹ方向およびＺ方向に沿って当接するように配置される。Ｘ方向に対して接続部材３の両端に位置する凸部３０の端部は、カバー部２４、４４により覆われている。   When the connection member 3 and the frame members 20 and 40 are joined, the convex portion 30 is disposed so as to abut against the concave portions 21 and 41 of the frame plate portions 22 and 42 along the Y direction and the Z direction. You. The ends of the protrusions 30 located at both ends of the connection member 3 in the X direction are covered by covers 24 and 44.

さらに、接続部材３は、フィルタ枠２の角部を形成する面（接続部材３の外周面３２ａ）からＹ方向およびＺ方向に突出し、接続部材３に接合した枠材２０、４０の外周面の方向に沿うように設けられた堰３１を有する。堰３１の詳細については、後述する。   Further, the connecting member 3 protrudes in the Y direction and the Z direction from the surface forming the corner portion of the filter frame 2 (the outer peripheral surface 32 a of the connecting member 3), and the outer peripheral surfaces of the frame members 20 and 40 joined to the connecting member 3. It has a weir 31 provided along the direction. Details of the weir 31 will be described later.

枠材２０、４０および接続部材３は、例えば、ＡＢＳ樹脂、ポリプロピレン、ポリスチレン、ポリカーボネート、ポリフタルアミド等の樹脂材料を用いて作製される。   The frame members 20 and 40 and the connection member 3 are made of, for example, a resin material such as ABS resin, polypropylene, polystyrene, polycarbonate, and polyphthalamide.

図４は、接続部材３を示す図であり、（ａ）は接続部材３を内周面３２ｂ側から見た図であり、（ｂ）は接続部材３を外周面３２ａ側から見た図である。   4A and 4B are diagrams illustrating the connection member 3, in which FIG. 4A is a diagram of the connection member 3 viewed from the inner peripheral surface 32b side, and FIG. 4B is a diagram of the connection member 3 viewed from the outer peripheral surface 32a side. is there.

堰３１は、第一の方向および第二の方向（接続部材３の長手方向に直交する方向）を向く面を有する板状の形状であり、複数の凸部３０の面と平行に設けられる。堰３１の長手方向の両端部は切り欠かれており、堰３１の長手方向の長さは接続部材３の長手方向の長さよりも短い。切欠きは、枠材２０、４０と接続部材３の接合時に、カバー部２４、４４の端部と当接する。   The weir 31 has a plate-like shape having a surface facing in the first direction and the second direction (a direction orthogonal to the longitudinal direction of the connection member 3), and is provided in parallel with the surfaces of the plurality of protrusions 30. Both ends of the weir 31 in the longitudinal direction are cut out, and the longitudinal length of the weir 31 is shorter than the longitudinal length of the connecting member 3. The notch contacts the ends of the cover parts 24 and 44 when the frame members 20 and 40 and the connection member 3 are joined.

堰３１は、接続部材３と枠材２０、４０の接続部分を覆うように設けられる。これにより、堰３１はエアフィルタ１を組み立てる際に、凸部３０の間から漏れ出したシール材がフィルタ枠２外へ漏れ出すのを防止することができる。   The weir 31 is provided so as to cover a connection portion between the connection member 3 and the frame members 20 and 40. Thereby, when assembling the air filter 1, the weir 31 can prevent the sealing material that has leaked out from between the projections 30 from leaking out of the filter frame 2.

図５は、接続部材３を気流方向から見た図である。   FIG. 5 is a view of the connection member 3 as viewed from the airflow direction.

凸部３０は、図５に示す例では、先細りにされた先端部３３を有している。これにより、凸部３０の厚みが厚い場合であっても、エアフィルタ１を組み立てる際に、凸部３０を凹部２１、４１に簡単に挿入することができる。先端部３３は、図５に示す例において、厚み方向の片側のみ削り取られた形態を有しているが、厚み方向の両側において削り取られた形態が採用されてもよい。   In the example shown in FIG. 5, the convex portion 30 has a tapered tip portion 33. Thereby, even when the thickness of the protrusion 30 is large, the protrusion 30 can be easily inserted into the recesses 21 and 41 when assembling the air filter 1. In the example shown in FIG. 5, the tip portion 33 has a form in which only one side in the thickness direction is cut off, but a form in which both ends in the thickness direction are cut off may be adopted.

図６は、エアフィルタ１の組立方法を示す斜視図である。   FIG. 6 is a perspective view illustrating a method of assembling the air filter 1.

この具体例では、まず、第一の枠材２０の両端に接続部材３のＹ方向に突出した凸部３０を接合（挿入）し、エアフィルタ１の下辺をなす部分を作製する。接合した接続部材３のＺ方向に突出した凸部３０を上方（−Ｚ方向）に向けて置き、枠板部２２の内周面２２ａおよび接続部材３の内周面３２ｂ（内周面２２ａと同一面上に位置する面）に、例えばウレタン樹脂のシール材（兼接着材）を塗布する。接続部材３の内周面３２ｂにまでシール材が塗布されることにより、接続部材３の内周面３２ｂと第二の枠材４０の端面（接続部材３と接する面）に隙間ができず、リークが発生しにくくなる。   In this specific example, first, the protrusions 30 protruding in the Y direction of the connection member 3 are joined (inserted) to both ends of the first frame member 20 to produce a portion forming the lower side of the air filter 1. The projection 30 protruding in the Z direction of the joined connecting member 3 is placed upward (-Z direction), and the inner peripheral surface 22a of the frame plate 22 and the inner peripheral surface 32b of the connecting member 3 (the inner peripheral surface 22a and A sealing material (also serving as an adhesive) of, for example, urethane resin is applied to the surfaces located on the same surface. Since the sealing material is applied to the inner peripheral surface 32b of the connection member 3, no gap is formed between the inner peripheral surface 32b of the connection member 3 and the end surface (the surface that contacts the connection member 3) of the second frame member 40, Leaks are less likely to occur.

このとき、枠板部２２の内周面２２ａには、凹凸形状２６が設けられている。このため、内周面２２ａの表面積が、凹凸形状２６がない場合に比べて大きくなる。その結果、シール材と内周面２２ａとの接着面積が増え、シール材と内周面２２ａとの接着性が増す。   At this time, the uneven shape 26 is provided on the inner peripheral surface 22 a of the frame plate portion 22. For this reason, the surface area of the inner peripheral surface 22a is larger than that in the case where the uneven shape 26 is not provided. As a result, the bonding area between the sealing material and the inner peripheral surface 22a increases, and the adhesiveness between the sealing material and the inner peripheral surface 22a increases.

次いで、フィルタパック７０を、横方向（濾材５０の折り目と直交する方向）の両側から第二の枠材４０で挟持して圧縮し、フィルタパック組立体８０を作製する。フィルタパック７０と第二の枠材４０とは、接着剤により線接着されることで固定されている。線接着は、濾材５０の折り目が延びる方向（Ｚ方向）に沿った接着である。   Next, the filter pack 70 is sandwiched and compressed by the second frame member 40 from both sides in the horizontal direction (the direction orthogonal to the fold of the filter medium 50), and the filter pack assembly 80 is manufactured. The filter pack 70 and the second frame member 40 are fixed by wire bonding with an adhesive. The line bonding is bonding along the direction in which the fold of the filter medium 50 extends (Z direction).

フィルタパック組立体８０を、第一の枠材２０に対して、Ｙ方向に位置決めする。また、図６に示すように、第一の枠材２０の気流の下流側の縁に、フィルタパック組立体８０の気流の下流側の縁を合わせて、この縁を回動中心としてフィルタパック組立体８０が回動されるよう仮固定する。この状態で、第一の枠材２０の凸部３０が、フィルタパック組立体８０の第二の枠材４０の凹部４１に挿入されることを確認しながら、図６の矢印で示すように、フィルタパック組立体８０を回動して、凸部３０を凹部４１に挿入し、フィルタパック７０をシール材に接触させる。濾材５０（フィルタパック７０）は、シール材で形成される層内にプリーツの折り目が延びる方向の端部が埋まるように配置される。これにより、シール材は濾材５０の折り目形状により区画されるようになっている。   The filter pack assembly 80 is positioned in the Y direction with respect to the first frame member 20. As shown in FIG. 6, the downstream edge of the airflow of the first frame member 20 is aligned with the downstream edge of the airflow of the filter pack assembly 80, and this edge is used as a rotation center. The solid 80 is temporarily fixed so as to be rotated. In this state, while confirming that the convex portion 30 of the first frame member 20 is inserted into the concave portion 41 of the second frame member 40 of the filter pack assembly 80, as shown by the arrow in FIG. By rotating the filter pack assembly 80, the protrusion 30 is inserted into the recess 41, and the filter pack 70 is brought into contact with the sealing material. The filter medium 50 (the filter pack 70) is arranged such that the end in the direction in which the fold of the pleat extends in the layer formed of the sealing material. Thus, the sealing material is partitioned by the fold shape of the filter material 50.

フィルタパック７０を一旦シール材に接触させると、フィルタパック組立体８０を第一の枠材２０から離すことができなくなる。このため、仮に、フィルタパック組立体８０が第二の枠材４０に対してＹ方向にずれた状態で接着された場合は、エアフィルタ１の性能に問題が生じるような歪みとなる。本組立方法では、フィルタパック組立体８０を、上述のように第一の枠材２０に対して回動させられることで、フィルタパック組立体８０を第一の枠材２０に対して精度良く位置決めすることができる。   Once the filter pack 70 comes into contact with the sealing material, the filter pack assembly 80 cannot be separated from the first frame member 20. For this reason, if the filter pack assembly 80 is bonded to the second frame member 40 in a state where the filter pack assembly 80 is displaced in the Y direction, the distortion may cause a problem in the performance of the air filter 1. In this assembling method, the filter pack assembly 80 is rotated with respect to the first frame member 20 as described above, so that the filter pack assembly 80 is accurately positioned with respect to the first frame member 20. can do.

次いで、第一の枠材２０の両端に接続部材３のＹ方向に突出した凸部３０を接合し、エアフィルタ１の上辺をなす部分を作製する。また、枠板部２２の内周面２２ａに、例えばウレタン樹脂のシール材（兼接着材）を塗布する。その後、接合した接続部材３のＺ方向に突出した凸部３０を下方（＋Ｚ方向）に向け、フィルタパック組立体８０の第二の枠材４０の凹部４１に挿入し、フィルタパック７０をシール材に接触させる。以上のようにして、エアフィルタ１は組み立てられる。   Next, the protruding portions 30 protruding in the Y direction of the connection member 3 are joined to both ends of the first frame member 20 to produce a portion forming the upper side of the air filter 1. Further, a sealing material (also as an adhesive) of, for example, urethane resin is applied to the inner peripheral surface 22a of the frame plate portion 22. After that, the projecting portion 30 projecting in the Z direction of the joined connecting member 3 faces downward (+ Z direction) and is inserted into the concave portion 41 of the second frame member 40 of the filter pack assembly 80, and the filter pack 70 is sealed. Contact. The air filter 1 is assembled as described above.

このような本実施形態におけるフィルタ枠２およびエアフィルタ１は、フィルタ枠２およびフィルタパック７０間の密性の低下を低減することができる。すなわち、枠板部２２の内周面２２ａに凹凸形状２６を設けたことにより、内周面２２ａと、この内周面２２ａに配置されるシール材との接着性を向上させることができる。これにより、熱収縮（熱膨張）の影響を受ける環境下であっても、シール材と内周面２２ａとが剥離することを低減できる。   The filter frame 2 and the air filter 1 according to the present embodiment can reduce a decrease in tightness between the filter frame 2 and the filter pack 70. That is, by providing the unevenness 26 on the inner peripheral surface 22a of the frame plate portion 22, the adhesiveness between the inner peripheral surface 22a and the sealing material disposed on the inner peripheral surface 22a can be improved. Thereby, even in an environment affected by thermal shrinkage (thermal expansion), peeling of the sealing material from the inner peripheral surface 22a can be reduced.

また、シール材の収縮量が最も大きくなるのは、シール材の長さが長い領域である。上述したように、シール材の層は、濾材５０のプリーツの折り目形状によりある程度区画されている。この区画された領域を内周面２２ａに平行する面上で見た場合、シール材の長さが最も長くなるのは気流方向に沿う方向の長さである。すなわち、濾材５０のプリーツ形状が形成するＶ字の深さ（高さ）に相当する長さである。この収縮量が最も大きくなる領域を考慮して、本実施形態におけるフィルタ枠２およびエアフィルタ１は、気流方向に直交する方向に線状に延びた凹凸形状２６を設けた。これにより、凹凸形状２６は、気流方向に沿う内周面２２ａの長さを凹凸形状２６の分だけ長くする、すなわち、シール材と内周面２２ａとの接触長さを長くしている。その結果、凹凸形状２６は、最も収縮量が大きくなる方向の接着性を高めることができる。   The region where the length of the sealing material is long is where the amount of contraction of the sealing material is greatest. As described above, the sealing material layer is divided to some extent by the pleated shape of the pleats of the filter medium 50. When this partitioned area is viewed on a plane parallel to the inner peripheral surface 22a, the length of the sealing material becomes the longest in the direction along the airflow direction. That is, the length is equivalent to the depth (height) of the V-shape formed by the pleated shape of the filter medium 50. In consideration of the region where the amount of shrinkage is greatest, the filter frame 2 and the air filter 1 in the present embodiment are provided with the uneven shape 26 linearly extending in a direction perpendicular to the airflow direction. Thus, the uneven shape 26 increases the length of the inner peripheral surface 22a along the airflow direction by the amount of the uneven shape 26, that is, increases the contact length between the sealing material and the inner peripheral surface 22a. As a result, the concavo-convex shape 26 can enhance the adhesiveness in the direction in which the amount of shrinkage is largest.

本発明のフィルタ枠、エアフィルタは上記実施形態に限定されず、本発明の主旨を逸脱しない範囲において、種々の改良や変更を行うことができる。
例えば、凹凸形状は、枠板部の内周面の全面に設けられていなくてもよい。凹凸形状は、平滑面でなければよく、単に面を粗くすることにより形成されてもよい。また、凹凸形状は、点状の凸や凹であってもよい。
凹凸形状は、第一の方向に配置される枠材に限らず、第二の方向に配置される枠材に設けてもよく、全ての枠材に設けてもよい。 The filter frame and air filter of the present invention are not limited to the above embodiment, and various improvements and modifications can be made without departing from the gist of the present invention.
For example, the uneven shape may not be provided on the entire inner peripheral surface of the frame plate portion. The uneven shape need not be a smooth surface, and may be formed simply by roughening the surface. Further, the uneven shape may be a point-like convex or concave.
The uneven shape is not limited to the frame material arranged in the first direction, and may be provided on the frame material arranged in the second direction, or may be provided on all the frame materials.

１ エアフィルタ
２ フィルタ枠
３ 接続部材
２０ 第一の方向に配置される枠材（第一の枠材）
２２、４２ 枠板部
２２ａ 内周面
２６ 凹凸形状
２６ａ 凹部
２６ｂ 凸部
４０ 第二の方向に配置される枠材（第二の枠材） DESCRIPTION OF SYMBOLS 1 Air filter 2 Filter frame 3 Connection member 20 Frame material arranged in the first direction (first frame material)
22, 42 Frame plate portion 22a Inner peripheral surface 26 Concavo-convex shape 26a Concave portion 26b Convex portion 40 Frame material arranged in second direction (second frame material)

Claims (4)

フィルタパックをシール材によりフィルタ枠の内周面に固定したエアフィルタのフィルタ枠において、
フィルタパックを囲むように矩形に組み合わされ、前記フィルタパックを通過する気流に直交する第一の方向に配置される枠材と、前記第一の方向に直交する第二の方向に配置される枠材を備え、
前記第一の方向に配置される枠材および前記第二の方向に配置される枠材の少なくとも一方は、粗面化された内周面を有することを特徴とするフィルタ枠。 In a filter frame of an air filter in which a filter pack is fixed to an inner peripheral surface of the filter frame with a sealing material,
A frame member combined in a rectangular shape so as to surround the filter pack and arranged in a first direction orthogonal to an airflow passing through the filter pack, and a frame arranged in a second direction orthogonal to the first direction Material,
A filter frame, wherein at least one of the frame member arranged in the first direction and the frame member arranged in the second direction has a roughened inner peripheral surface. 前記第一の方向に配置される枠材または前記第二の方向に配置される枠材の内周面は、線状に延びた複数条の凹凸形状が設けられることにより粗面化されたことを特徴とする請求項１に記載のフィルタ枠。   The inner peripheral surface of the frame material arranged in the first direction or the frame material arranged in the second direction is roughened by providing a plurality of linearly extending irregularities. The filter frame according to claim 1, wherein: 請求項１または請求項２に記載のフィルタ枠を備えたエアフィルタ。   An air filter comprising the filter frame according to claim 1. 前記フィルタパックは、プリーツ加工された濾材を有し、前記濾材はプリーツの折り目が延びる方向が気流方向に直交する方向に配置されており、
前記第一の方向に配置される枠材は、プリーツの折り目が延びる方向と直交する方向に配置され、
前記第一の方向に配置される枠材の内周面は、前記プリーツの折り目が延びる方向および気流方向に直交する方向に沿って前記線状に延びた複数条の凹凸形状が設けられることにより粗面化されたことを特徴とする請求項３に記載のエアフィルタ。 The filter pack has a pleated filter medium, the filter medium is arranged in a direction in which the direction in which the fold of the pleat extends is orthogonal to the airflow direction,
The frame material arranged in the first direction is arranged in a direction perpendicular to the direction in which the fold of the pleats extends,
The inner peripheral surface of the frame material arranged in the first direction is provided with the plurality of linearly extending and recessed shapes extending linearly along the direction in which the fold of the pleats extends and the direction perpendicular to the airflow direction. The air filter according to claim 3, wherein the air filter is roughened.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57145527U (en) * 1981-03-03 1982-09-13
JPS59150513U (en) * 1983-03-28 1984-10-08 高砂熱学工業株式会社 Unit type air filter
JP2010131580A (en) * 2008-10-30 2010-06-17 Duskin Co Ltd Filter, exhauster using the same, manufacturing method of filter and filter manufacturing device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57145527U (en) * 1981-03-03 1982-09-13
JPS59150513U (en) * 1983-03-28 1984-10-08 高砂熱学工業株式会社 Unit type air filter
JP2010131580A (en) * 2008-10-30 2010-06-17 Duskin Co Ltd Filter, exhauster using the same, manufacturing method of filter and filter manufacturing device

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