JPS605218A - Air filter - Google Patents

Abstract

PURPOSE:To obtain a filter low in initial pressure loss and reduced in pressure loss during use, in an air filter formed by folding a sheet like filter material in a zigzag pattern, by providing a narrow plane at right angles to an air stream to the fold part thereof on the windward side. CONSTITUTION:An air filter 1 is equipped with a filter material 2 folded in a multi-stage zigzag state and a finger shaped spacers 3 arranged to the filtering surface of the filtering surface of the filter material 2 on the leeward side. In this case, the fold part 2 on the windward side form narrow planes 21 at right angles to an air stream and the fold parts 22 on the leeward side form edge shapes. In this filter, the wind pressure of the air stream passing the planes 21 and that of the air stream passing the side surfaces 23 of the ridge parts are well-balanced and, as a result, the warpage of each side surface 23 to the inside is prevented and the desired purpose can be achieved.

Description

【発明の詳細な説明】 技術分野： 本発明は空気濾過体、特に初期圧力損失が低くかつ使用
時にも王カ損失上昇の少ない空気濾過体に関する。DETAILED DESCRIPTION OF THE INVENTION Technical Field: The present invention relates to an air filter, and particularly to an air filter having a low initial pressure loss and a small increase in kingly loss during use.

従来技術： 空気濾過体には９例えば、第１図に示すような折りたた
み巾の小さなミニプリーツタイプ（ヨーロッパタイプ）
１０と、第２図に示すような折りたたみ巾の大きなディ
ーププリーツタイプ（アメリカンタイプ）１１がある。Conventional technology: For example, the air filter is a mini pleat type (European type) with a small folding width as shown in Figure 1.
10, and deep pleat type (American type) 11 with a large folding width as shown in Fig. 2.

１１１は帯状スペーサ１１０が共にエツジ状をなしてい
る。このような形状の濾過材は濾過時に風圧により、第
３図に示すように、濾過面１３がたわんで変形する。濾
過面１３同志が一部重なり合ってデッドスペース１４を
形成する。このデッドスペース１４には風が流れ込まな
いため、初期通気抵抗、っまり初期圧力損失、が大きく
なる。この傾向は、使用時に塵埃が付着するにつれて増
大する。それゆえ、従来の空気濾過体は、シート状濾過
材をジグザグ状に折りたたんで濾過面積を大きくしてい
るがそれにもかかわらずその実！Ｕ的濾過面積は小さく
圧力ｔｉ失が高くなる。また、デッドスペースの発生を
防止するためには、スペーサ、特にフィンガー型スペー
サを数多く小間隔で配置する必要がある。これは濾過面
積を小さくするうえに濾過体の製作を繁雑にしコスト高
の１９因ともなる。111, the band-shaped spacers 110 are both edge-shaped. In the filter medium having such a shape, the filter surface 13 is bent and deformed by wind pressure during filtration, as shown in FIG. The filter surfaces 13 partially overlap to form a dead space 14. Since no wind flows into this dead space 14, the initial ventilation resistance, ie, the initial pressure loss, becomes large. This tendency increases as dust accumulates during use. Therefore, conventional air filters increase the filtration area by folding the sheet-like filter material in a zigzag shape, but this is true! The U-shaped filtration area is small and the pressure loss is high. Furthermore, in order to prevent the occurrence of dead spaces, it is necessary to arrange a large number of spacers, especially finger-type spacers, at small intervals. This not only reduces the filtration area, but also complicates the manufacturing of the filter body, resulting in increased costs.

発明の目的： 本発明の目的は、初期圧力拶失が低くしかも使用時に２
ける圧力損失の上昇の少ない空気濾過体を提供すること
にある。本発明の（ｔｌ＋の目的は、濾過風量の多い優
れた空気濾過体を提供することにある。Purpose of the invention: The purpose of the present invention is to provide a low initial pressure loss and a low pressure loss during use.
An object of the present invention is to provide an air filtration body with a small increase in pressure loss. The purpose of the (tl+) of the present invention is to provide an excellent air filter with a large filtration air volume.

発明の要旨： 本発明の空気濾過体は、ジグザグ状に折りたたんだ濾過
材の風上側の折り１部が空気流に対し直角の細巾平面金
なしかつ風下側の折り１部がエツジ状をなす。このこと
により上記目的が達成されるＯ 濾過材は格別である必要はなく、めらゆる公知の濾過材
が用いられうる０その一例金挙げれば。Summary of the invention: The air filter of the present invention has a zigzag-folded filtration material, in which one part of the windward fold is perpendicular to the air flow and has no flat metal plate, and one part of the leeward fold has an edge shape. . The filtration material that achieves the above object does not need to be special, and any known filtration material may be used.

微細なガラス繊維が戸紙状に既知手段で加工された炉材
がある。原上側の細巾平面の細巾寸法と。There is a furnace material in which fine glass fibers are processed into a door paper shape using known means. The width dimension of the width plane on the original upper side.

相隣る細巾平面間の距離との比は２：１〜１：２の範囲
、好ましくは約１：１に設定される。この比が過度に太
きいと折りたたみ数が少なくなり濾過面積が小さくなっ
てしまう。この比が過度に小さいと細巾平面が小さくな
るため本発明の効果を得ることができない。この比がた
とえ１：１であっても各寸法が過度に大きいと、同様に
、折りたたみ数が少なくなり濾過面積が小ざくなる。細
巾平面の細巾寸法は空気濾過体全体の大きさ、用途など
にも依存するが２通常最低５嘔前後に設定されることが
望ましい。The ratio of the distance between adjacent narrow planes is set in the range of 2:1 to 1:2, preferably about 1:1. If this ratio is too large, the number of folds will decrease and the filtration area will become small. If this ratio is too small, the narrow width plane becomes small, making it impossible to obtain the effects of the present invention. Even if this ratio is 1:1, if each dimension is too large, the number of folds will similarly decrease and the filtration area will decrease. Although the width dimension of the width plane depends on the overall size of the air filter and its usage, it is usually desirable to set it at least around 5mm.

ジグザグ状に折りたたんだ濾過材の両面には連続したス
ペーサが対向して配置づれうる。スペーサとしてはｒ過
表面を損傷させることなく常時所定の間隔に維持しうる
ものであれは材質、形状ななどに特に制限はない。その
例としては、ゴム。Continuous spacers may be disposed oppositely on both sides of the zigzag-folded filter medium. There are no particular restrictions on the material or shape of the spacer as long as it can maintain a predetermined spacing at all times without damaging the surface. An example of this is rubber.

糸、アスベスト、厚紙テープなどでなる帯状スペーサが
挙げられる。これがい過材の両面に対向して接着などの
手段により配置される。この帯状スペーサを濾過材の風
上側の稜線部および風下側の稜線部をそれぞれ連結する
形で配置することもできる。上記濾過面のスペーサーと
稜線部のスペーサとを併設することも可能である。スペ
ーサとしてアルミなどの軽金臓やプラスチックなどの可
撓性材でなるフィンガー型スペーサ全濾過而の一方。Examples include band-shaped spacers made of thread, asbestos, cardboard tape, etc. This is placed opposite both sides of the overfill material by adhesive or other means. This band-shaped spacer can also be arranged so as to connect the windward side ridgeline part and the leeward side ridgeline part of the filter medium, respectively. It is also possible to provide the spacer on the filtration surface and the spacer on the ridge line side by side. Finger-type spacers made of light metal such as aluminum or flexible materials such as plastic are used as spacers for total filtration.

例えば風下側に配置することも可能である。For example, it is also possible to arrange it on the leeward side.

実施例 以下に本発明を実施例について具体的に説明する。Example The present invention will be specifically described below with reference to Examples.

実施例１ 第４図に本発明の空気濾過体１が示されている。Example 1 FIG. 4 shows an air filter 1 according to the invention.

これは、ジグザグ状に多段に折りたたまれた濾過材２と
、濾過材２の皮下側濾過面に配置されたフィンガー型ス
ペーサ３とを備えている。この濾過体１は、木質、金属
、プラスチックスなどでなる枠４に適宜取りつけて用い
られうる。This includes a filtering material 2 folded in multiple stages in a zigzag shape, and finger-shaped spacers 3 arranged on the subcutaneous filtering surface of the filtering material 2. This filter body 1 can be used by being appropriately attached to a frame 4 made of wood, metal, plastic, or the like.

との濾過材２は１例えばガラス繊維をＰ紙状に加工した
中性能Ｆ紙Ｃ重ｆｔ　９０　ｇ／ｉ　；　ＬＯＯＰ　Ｏ
，３ｔｔｍ　径の単分散粒子に対する塵埃捕集ｇ６ｏ％
）を６１０ｍ＋ｉ四方に切り出し、これをジグザグ状に
折りたたんだものである。風上側の折り１部２１は空気
流に頂角の細巾平面を形成し、風下側の折り１部２２は
エツジ状を形成している。例えば、折りたたみ巾（奥ゆ
き）ｄは１２０ｍ、山数は４６個、風上側の細巾平面の
細巾Ｗは６瓢、そして平面間の距離ノは７Ｉ＋ＩＩＩ！
である。The filter material 2 is 1, for example, medium performance F paper made of glass fiber processed into P paper C weight ft 90 g/i; LOOP O
,3ttm diameter dust collection g6o% for monodispersed particles
) was cut into a 610m+i square and folded into a zigzag shape. The first fold 21 on the windward side forms a narrow plane with an apex angle in the air flow, and the first fold 22 on the leeward side forms an edge shape. For example, the folding width d is 120m, the number of peaks is 46, the width W of the narrow plane on the windward side is 6 gourds, and the distance between the planes is 7I+III!
It is.

Ｆ紙は上記形状に連続的に折り込む方法として。As a method of folding F paper continuously into the above shape.

例えは第５図に示すような折り込み装置が採用される。For example, a folding device as shown in FIG. 5 is employed.

この装置は、前押し手段５と繰出し手段６とを有する。This device has forward pushing means 5 and feeding means 6.

前押し手段５は例えば一対のローラ５０．５０でなり、
シート状Ｐ紙７を挾持しつつ適当な速度で駆動する。こ
の一対の前押しローラ５ｏ。The forward pushing means 5 comprises, for example, a pair of rollers 50.50,
The sheet P paper 7 is held and driven at an appropriate speed. This pair of forward pushing rollers 5o.

５０のそれぞれの外周に前押歯５００．５００・・・お
よび受歯５５５．５５５−・・が設けられている。各ロ
ーラ５０１５０が回転すると、相互のローラの前押＃　
５００と受歯５５５とがＦ紙７を介して嵌合しＦ紙の所
定位置に所望の折筋をつける。繰出し手段６から出てく
る折筋のついたＦ紙７は例えはその折り巾と略等しい開
口巾をもった箱体８に折筋にてプリーツ状に１１１次折
りたたまれながら収容されてゆく。Front push teeth 500, 500... and receiving teeth 555, 555... are provided on the outer periphery of each of the teeth 50. When each roller 50150 rotates, the mutual rollers are pushed #
500 and the receiving tooth 555 are fitted with the F paper 7 interposed therebetween, and a desired crease is made at a predetermined position on the F paper. The F paper 7 with creases coming out from the feeding means 6 is housed in a box 8 having an opening width approximately equal to the folding width thereof, while being folded 111 times in a pleat shape along the creases.

実施例２一 実施例１のフィンガー型スペーサの代りに、第６図に示
すように、アスベスト、ガラス繊維１今成繊維などでな
る帯状スペーサ３０がＦ紙の両面に対向して接層配置さ
れる。また、風上側の稜線部と風下側の稜線部にアスベ
スト、ガラス繊維。Embodiment 2 Instead of the finger-type spacers of Embodiment 1, as shown in FIG. 6, band-shaped spacers 30 made of asbestos, glass fibers, and synthetic fibers were placed in contact with both sides of F paper. Ru. In addition, there is asbestos and glass fiber on the windward and leeward ridges.

合成繊維などのテープ、ひもなどをスペーサ３１として
、上記帯状スペーサ３０と共にもしくは別に配置するこ
とも可能である０ 実験例】 実施例１の空気ＰｉｌＤ体１を用いてｒｆＡｊｔ　５０
ｎｆ／ｍｉｎ全処理したときの初期圧力損失（ｍｓ　Ｗ
、　Ｇ、　）と、最終圧力損失３５　ｙｒｍＷ、　Ｇ、
における塵埃保持量＜ｇ）と全測定した。塵埃として、
カーボンブラック、関東ローム、、＊ｔＵａなどでなる
ＪＩＳ規格１５８ｉの混合ダストが用いられた。比較例
としては従来の空気濾過体が用いられた。これは、廊上
側・風下側の折り１部がいづれもエツジ状であること以
外はすべて実施例１の空気濾過体と同じである。測定結
果を下表に示す。表から明らかなように９本発明の濾過
体は対照の濾過体に比較して初期圧力損失が著しく低く
、シかも使用時の圧力十〇失の上昇名が対照の１７２で
ある。It is also possible to use a tape or string made of synthetic fiber as a spacer 31 and place it together with or separately from the above-mentioned strip spacer 30. Experimental example] Using the air PilD body 1 of Example 1, rfAjt 50
Initial pressure loss (ms W
, G, ) and the final pressure drop 35 yrmW, G,
The amount of dust retained <g) was measured in all cases. As dust,
A JIS standard 158i mixed dust consisting of carbon black, Kanto loam, *tUa, etc. was used. A conventional air filter was used as a comparative example. This is the same as the air filter of Example 1 except that the folds on the corridor side and the leeward side are both edge-shaped. The measurement results are shown in the table below. As is clear from the table, the filter element of the present invention has a significantly lower initial pressure loss than the control filter element, and the increase in pressure loss during use is 172 compared to the control.

このように本発明のＩｐ赤体が優れている理由は。What is the reason why the Ip red body of the present invention is so excellent?

本発明の濾過体においては、第７図に示すように先端の
細巾平面２１を通過した空気流のＩ＠王と山の側面２３
から炉材を通過する空気流の風圧とがバランスする結果
、Ｐ材側面２３の内倶ｌへのたわみが防止されるからで
ある。仙万、対照の濾過体においては、既述（第３図）
のように、Ｐ材側面１３が風圧でたわみデッドスペース
１４を形成するため圧力損失が大きくなる０ 実験例２ 供試濾過体は、実施例１の濾過体１の折り１部の細巾平
面の細巾Ｗが７ｍそして細巾平面間の距離ノが６ｍｓで
あること以外はすべて実施例１の空気濾過体１と同じで
あり、これが実験例１と同じ条件下で試験に供された。In the filter body of the present invention, as shown in FIG.
This is because the wind pressure of the air flow passing through the furnace material is balanced, and as a result, deflection of the P material side surface 23 toward the inner wall is prevented. In the case of Senman and the control filter body, as already described (Fig. 3)
As shown in the figure, the pressure loss increases because the P material side surface 13 bends due to wind pressure and forms a dead space 14. It was the same as the air filter 1 of Example 1 except that the width W was 7 m and the distance between the narrow width planes was 6 ms, and it was tested under the same conditions as Experimental Example 1.

その結果全下表に示す。The results are shown in the table below.

この場合も同殊に本発明の濾過体は対照としての従来の
濾過体に比較して初期圧力損失が著しく低く、シかも使
用時の圧力損失上昇が著しく少ないことがわかる。その
理由は、実１例１の場合と同じである。In this case as well, it can be seen that the filter body of the present invention has a significantly lower initial pressure loss than the conventional filter body as a control, and also has a significantly lower increase in pressure loss during use. The reason is the same as in Example 1.

実験例３ 実施例１の折り１部の細巾平面の細巾Ｗが５ｍそして細
巾平面間の距離！が８ｍであること以外はすべて実施例
１の空気濾過体と同じものが実験例１と同じ条件下で試
験に供された。その結果を下表に示す。この場合にも初
期圧力損失および塵埃保持蓋のいづれにおいても本発明
の濾過体は従来型濾過体よりはるかに優れている０その
理由も実験例１の場合と同じである。Experimental Example 3 The width W of the narrow width plane of the fold 1 part of Example 1 is 5 m and the distance between the narrow width planes! The same air filter as in Example 1 was tested under the same conditions as in Experimental Example 1, except that the length was 8 m. The results are shown in the table below. In this case as well, the filter of the present invention is far superior to the conventional filter in terms of both initial pressure loss and dust retention lid.The reason for this is the same as in Experimental Example 1.

実験例４ 風上側・風下側の折り１部をいづれも空気流に■角の細
巾平面とした濾過体が試験に供された。Experimental Example 4 A filter body in which both the windward side and leeward side folds were made into a narrow square square plane for air flow was used for testing.

このときの風上側の細巾平面の細巾は５脳そして風下側
の細巾は３咽であった。下表かられかるように、その初
期圧力損失は２１．５　ｎｓＷ、　Ｇ、であり。At this time, the width of the narrow plane on the windward side was five brains, and the narrow plane on the leeward side was three throats. As can be seen from the table below, the initial pressure drop is 21.5 nsW, G.

これは対照の従来型濾過体の初期圧力４“−失よりも大
きい、塵埃保持量についても従来型濾過体よりも劣る。This is greater than the initial pressure loss of 4" for the control conventional filter, which is also inferior to the conventional filter in terms of dust retention.

このことから、風下側の折り１部も細巾平面にすること
は、従来型の風上（ｌｌｕと風下側とのいづれもがエツ
ジ状をなす０５過体よりもむしろ劣ることがわかる。そ
の理由は、第８図に示すように、Ｐ材側面２３のたわみ
は先婦平面２１からの空気流により防がれうるが、川下
側の平ｒｍ２４に２いて渦流が発生しその結果窒気祇抗
がむしろ大きくなりしたがって圧力損失が上がるからで
あると考えられる。From this, it can be seen that making the first part of the fold on the leeward side a narrow plane is actually inferior to the conventional 05 fold where both the windward side and the leeward side are edge-shaped. The reason is that, as shown in Fig. 8, the deflection of the P material side surface 23 can be prevented by the air flow from the front plane 21, but a vortex is generated in the downstream flat rm 24, resulting in nitrogen gas This is thought to be because the resistance becomes rather large and the pressure loss increases accordingly.

発明の効果： 本発明の濾過体はジグザグ状の濾過材がデッドスペース
を形成しないことおよび渦流を発生させないために、有
効濾過面積が実質的に大きくなる。Effects of the Invention: The filter body of the present invention has a substantially large effective filtration area because the zigzag-shaped filter medium does not form a dead space and does not generate a vortex flow.

その結果初期圧力損失がきわだって低く、かつ使用時に
２ける圧力損失の上昇が著しく少ない。また１本発明の
濾過材はその形状に照らし、従来型よりもその機械的強
度が向上する。それゆえ、用いるべきスペーサの数が少
なくてすむ。これは濾過体の裏作を容易にしかつコスト
ダウンをもたらす０As a result, the initial pressure loss is extremely low, and the increase in pressure loss during use is extremely small. Furthermore, in view of its shape, the filter medium of the present invention has improved mechanical strength compared to conventional types. Therefore, fewer spacers need to be used. This makes it easier to prepare the filter and reduces costs.

【図面の簡単な説明】[Brief explanation of drawings]

第１図２よび第２因はそれぞれ従来の空気濾過体の部分
斜視図および断面側面図、第３図は従来の濾過体の使用
時における濾過材の洋動を説明す図は本発明の濾過材の
折り込み方法を説明する要部工程図、第７図は本発明の
Ｆ−ｉ１１ｐ３体の使用時におけ７＞濾過材の挙動を説
明する説明図、そして第８図は本発明濾過体の風下側の
エツジ部を平面にした場合の濾過体の使用時における濾
過材の激励を説明する説明図である。 １・・・本発明の空気濾過体、２・・・濾過材、　３．
３０゜３１、１１１．１１２・・・スペーサ、５・・・
筋押し手段、６・・・繰出し手段、７・・・Ｆ紙、２１
・・・用上側折り１部もしくは細巾平面、２２・・・川
下０１１＋折り１部もしくはエツジ状部、２３・・・Ｆ
材側面、２４・・・風下側平面、ｄ・・・折りたたみ巾
ＩＪ・・・細巾平面間の距離。 Ｗ・・・細巾平面の巾。 以　上 代理人　弁理士　山　本　秀　策 第７図 第８図 １０３−Figures 1 and 2 are a partial perspective view and a cross-sectional side view of a conventional air filter, respectively, and Figure 3 is a diagram illustrating the movement of the filter material when the conventional air filter is used. FIG. 7 is an explanatory diagram explaining the behavior of the filter material during use of the F-i11p3 body of the present invention, and FIG. 8 is a diagram showing the leeward side of the filter material of the present invention. It is an explanatory view explaining encouragement of a filter medium at the time of use of a filter body when a side edge part is made into a plane. 1...Air filter body of the present invention, 2...Filtering material, 3.
30°31, 111.112...Spacer, 5...
Stretching means, 6... Feeding means, 7... F paper, 21
...1 upper fold or narrow plane, 22...Downstream 011 + 1 fold or edge-shaped part, 23...F
Material side, 24...leeward side plane, d...folding width IJ...distance between narrow width planes. W... Width of the narrow plane. Agent: Hide Yamamoto, Patent Attorney Figure 7 Figure 8 103-

Claims (1)

【特許請求の範囲】 １、　シート状濾過材をジグザク状に折りたたんでなる
空気濾過体において。 風上側の折り口部が空気流に対し直角の細巾平面をなし
、そして風下側の折り口部がエツジ状をなす空気濾過体
。 ２、前記平面の細巾寸法と、相隣る該細巾十面間の距離
との比が２：１〜１：２の範囲にある特許請求の範囲第
１項に記載の空気濾過体。 ３、前記ジグザグ状に折りたたんだ濾過材の両面に対向
してもしくは片面に連続したスペーサーを配置した特許
請求の範囲第１項に記載の空気濾過体。 ４、　前記ジグザグ状に折りたたんだ濾過材の風上側お
よび風下側の稜線部をそれぞれ連結する形でスペーサを
配置した特許請求の範囲第１項に記載の空気Ｆ、通過体[Claims] 1. An air filter formed by folding a sheet-like filter material in a zigzag shape. An air filter in which the windward side fold part forms a narrow plane perpendicular to the airflow, and the leeward side fold part forms an edge shape. 2. The air filter according to claim 1, wherein the ratio of the width dimension of the plane to the distance between the ten adjacent narrow width surfaces is in the range of 2:1 to 1:2. 3. The air filter according to claim 1, wherein continuous spacers are disposed opposite to both sides of the zigzag-folded filter medium or on one side thereof. 4. The air F and passage body according to claim 1, wherein spacers are arranged to connect the ridgeline portions on the windward side and the leeward side of the filter medium folded in a zigzag shape, respectively.