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JP2004057914A - Fluid filter - Google Patents

Fluid filter Download PDF

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Publication number
JP2004057914A
JP2004057914A JP2002218889A JP2002218889A JP2004057914A JP 2004057914 A JP2004057914 A JP 2004057914A JP 2002218889 A JP2002218889 A JP 2002218889A JP 2002218889 A JP2002218889 A JP 2002218889A JP 2004057914 A JP2004057914 A JP 2004057914A
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Japan
Prior art keywords
filter medium
fluid
filter
inlet
storage section
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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JP2002218889A
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Japanese (ja)
Inventor
Teruo Shiraishi
白石 輝男
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Inoac Corp
Original Assignee
Inoue MTP KK
Inoac Corp
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Publication date
Application filed by Inoue MTP KK, Inoac Corp filed Critical Inoue MTP KK
Priority to JP2002218889A priority Critical patent/JP2004057914A/en
Priority to US10/349,862 priority patent/US6926828B2/en
Priority to AT03001559T priority patent/ATE297797T1/en
Priority to DE60300826T priority patent/DE60300826T2/en
Priority to EP03001559A priority patent/EP1334757B1/en
Publication of JP2004057914A publication Critical patent/JP2004057914A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2275/00Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2275/20Shape of filtering material
    • B01D2275/203Shapes flexible in their geometry, e.g. bendable, adjustable to a certain size
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2275/00Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2275/40Porous blocks
    • B01D2275/403Flexible blocks

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Materials (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Filtration Of Liquid (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To make collectable foreign substances of various sizes mixed in a fluid over the whole filter medium. <P>SOLUTION: The outside size of a filter medium 20 before being housed in a housing part 16 formed in a filter case 10 is set up to be appropriately larger than the inside volume of the housing part 16. The filter medium 20 is compressed to be housed in the housing part 16 so that a compression section 30 where the catching rate of the foreign substances is increased is formed in an optional section of the filter medium. In this way, the foreign substances having different sizes can be caught by the whole the whole filter medium 20. The dimensional difference between the filter medium 20 and the housing part 16 is set up to be larger on the side of a discharge opening 14 than on the side of an introduction port 12, and the degree of compression of the compression section 30 is larger on the side of the discharge opening 14 than on the side of the introduction port 12. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、流体フィルタに関し、更に詳細には、所要位置に流体の導入口および排出口を開設し、これら導入口および排出口に連通する収容部を内部に画成したケース体と、適度の弾力性を有する均一密度の多孔質体を材質とし、前記収容部に着脱自在に収容される濾材とから構成された流体フィルタに関するものである。
【0002】
【従来の技術】
例えば、空気清浄器、自動車用エンジン、流体圧シリンダ等、空気やガス等の気体またはオイル等の液体を活用する種々の装置では(以下、気体および液体を総称して「流体」という)、図10に示すように、この流体内に混在している微細な異物(塵埃、ゴミ等)を捕集して該流体を清浄化するための流体フィルタFLを、当該装置Mにおける流体導入部M1に装着する場合が多い。この流体フィルタFLは、種々形態・タイプのものが開発されると共に実用化されているが、例えば図11に示すように、所要位置に流体の導入口12および排出口14を開設し、これら導入口12および排出口14に連通する収容部16を内部に画成したフィルタケース(ケース体)10と、適度の弾力性を有する均一密度の多孔質体を材質とし、前記収容部16に着脱自在に収容される濾材20とから構成されている。そして、前記導入口12から収容部16へ導入した流体を前記濾材20に通過させて該流体に混在している微細な異物を捕集し、清浄化された流体を前記排出口14から排出するようになっている。
【0003】
ここで前記濾材20としては、例えば連泡構造を有するスポンジやウレタンフォーム等の合成樹脂製の連泡体、不織布または繊維集合体等、多数の孔(空隙)を有する所謂「多孔質体」が好適に実施可能であるが、該濾材20の密度(空隙の開口サイズや形成数)によって分散態様および圧力損失が変化し、流体に混在している異物の捕集率に影響を及ぼすものとなっている。例えば図11は、密度が低い(各空隙の開口サイズが大きく形成されて所謂「目が粗い」)多孔質体からなる均一密度の濾材20を実施した流体フィルタFLの構成断面図であり、また図12は、密度が高い(各空隙の開口サイズが小さく形成されて所謂「目が細かい」)多孔質体からなる均一密度の濾材20を実施した流体フィルタFLの構成断面図である。
【0004】
図11に示した流体フィルタFLでは、濾材20の全体が均一的に目が粗くなっているため、圧力損失が小さくなると共に異物が濾材20全体に適度に分散して捕集される利点があるが、空隙より小さいサイズの異物は捕集されることなく通過してしまうので、流体を確実に清浄化し得ない欠点を内在していた。一方、図12に示した流体フィルタFLでは、濾材20の全体が均一的に目が細かくなっているため相当に微細なサイズの異物を捕集し得る利点があるが、圧力損失が大きくなる欠点があると共に、濾材20における導入口12に臨んだ部位に種々サイズの異物が集中的に捕集されるようになるので、各種寸法差のある異物が濾材20全体に亘り捕集されずに短期間で目詰まりを起こす欠点を内在していた。
【0005】
そこで、種々サイズの異物を効率的に捕集するようにするため、例えば図13または図14に示すように、密度が低い(目が粗い)多孔質体からなる第1濾材20Aと、該第1濾材20Aより密度が高い(目が細かい)多孔質体からなる第2濾材20Bとを組合わせることで、大きいサイズの異物は第1濾材20Aで捕集し、小さいサイズの異物は第2濾材20Bで捕集するようにした流体フィルタFLが提案も実施されている。しかしながら、第1濾材20Aと第2濾材20Bとの境目において密度が急激に変化するため、第1濾材20Aで捕集されなかった異物の殆どは第2濾材20Bの外表面で集中的に捕集されてしまい、異物を夫々の濾材20A,20Bの全体に亘り捕集し得ないと共に圧力損失を最小限に抑えることができないため、依然として捕集率の向上を図るには解決すべき課題が残されている。
【0006】
【発明が解決しようとする課題】
ところで、図11および図12に示した従前の流体フィルタFLや、図13および図14に示した改良型の流体フィルタFLでは、部分的に圧縮変形させることが容易でかつ圧縮部位の圧縮度合に応じて密度を自在に変化させ得る、という多孔質体の特性を活かすことにより、濾材20の捕集率の向上を図るという技術的思想が全くなかった。例えば、図11および図12に示した従前の流体フィルタFLでは、図15に示すように、前記濾材20の外部形状を前記収容部16の内部形状と同一形状としてあるため、該濾材20は何等圧縮されることなく該収容部16内に収容保持されるようになり、該濾材20が全体的に均一密度となって捕集率の向上を図るには限界があった。また、図13および図14に示した従前の流体フィルタFLも、図16および図17に夫々示すように、第1濾材20Aおよび第2濾材20Bを合体させた外部形状を前記収容部16の内部形状と同一形状としてあるため、各々の濾材20A,20Bは何等圧縮されることなく該収容部16内に収容保持されるようになり、各濾材20A,20Bが全体的に均一密度となって捕集率の向上を図るには限界があった。
【0007】
【発明の目的】
この発明は、前述した従来技術に内在している前記課題に鑑み、これを好適にに解決するべく提案されたもので、ケース体に内部画成した収容部に対して濾材を圧縮的に収容することで、異物の捕集率が高まる圧縮部位を該濾材の任意部位に作り出すようにし、これにより流体に混在している種々サイズの異物を前記濾材の全体に亘って捕集し得るよう構成した流体フィルタを提供することを目的とする。
【0008】
【課題を解決するための手段】
前記課題を解決し、所期の目的を達成するため本発明は、所要位置に流体の導入口および排出口を開設し、これら導入口および排出口に連通する収容部を内部に画成したケース体と、適度の弾力性を有する均一密度の多孔質体を材質とし、前記収容部に着脱自在に収容される濾材とからなり、前記導入口から収容部へ導入した流体を前記濾材に通過させて該流体に混在している微細な異物を捕集し、清浄化された流体を前記排出口から排出するようにした流体フィルタにおいて、前記収容部に収容される前の前記濾材の外部寸法を、該収容部の内部容積より適宜大きく設定し、
前記収容部へ前記濾材を圧縮的に収容することで、前記異物の捕集率が高まる圧縮部位を当該濾材の任意の部位に作り出し、これにより各種寸法差のある前記異物を前記濾材の全体に亘り捕集し得るよう構成したことを特徴とする。
【0009】
【発明の実施の形態】
次に、本発明に係る流体フィルタにつき、好適な実施例を挙げて、添付図面を参照しながら以下説明する。なお実施例では、理解の容易化を図るために、図11〜図17に示した従来の流体フィルタFLと同一形状で例示する。従って、既出の部材および部位と同一の部材、部位については、同一の符号を付して指示する。
【0010】
【第1実施例】
図1は、第1実施例に係る流体フィルタを概略的に示す縦断側面図、図2は、図1示した流体フィルタを概略的に示す横断平面図、図3は、流体フィルタの分解斜視図である。第1実施例に係る流体フィルタFLは、所要位置に流体の導入口12および排出口14を開設し、これら導入口12および排出口14に連通する収容部16を内部に画成したフィルタケース(ケース体)10と、適度の弾力性を有する均一密度の多孔質体を材質とし、前記収容部16に着脱自在に収容される濾材20とから構成されている。なお本実施例では、多孔質体として連泡構造を有するウレタンフォームを例示するが、本願の濾材20として実施可能な多孔質体は、このウレタンフォーム以外に、樹脂(ゴムおよびプラスチック等)の連泡体、不織布、繊維集合体(プラスチック、無機物、金属等から形成されるもの)等も含まれる。
【0011】
前記フィルタケース10は、基本的には図11等に例示のものと同一であって、トレー状の第1半体10Aおよびトレー状の第2半体10Bとから構成され、これら第1半体10Aおよび第2半体10Bを、開口部同士を対向させた向きで相互に組付けることで矩形箱体状を呈し、前記濾材20を収容するための矩形状(長さ寸法L、幅寸法W、高さ寸法H)の収容部16を内部に画成するようになっている。そして第1半体10Aの一側部位には、前記収容部16内へ流体が流入するのを許容する横長の導入口12が開設されており、また第2半体10Bの一側部位には、前記収容部16内の流体がケース外部へ流出するのを許容する横長の排出口14が開設されている。このような第1半体10Aと第2半体10Bとを組付けた際には、図1において、フィルタケース10における下面左端部位に前記導入口12が開口し、該フィルタケース10における上面右端部位に前記排出口14が開口するようになっており、導入口12からフィルタケース10内へ導入された流体は、収容部16内の一端から他端まで流通移動した後に排出口14から該フィルタケース10外へ排出される。
【0012】
前記濾材20は、連泡構造を有する多孔質体であるウレタンフォームを材質とし、少なくとも前記収容部16に収容される前の外部寸法を、該収容部16の内部容積より適宜大きく設定してある。これにより後述するように、前記収容部16に対して圧縮的に収容されるようにすることで、流体に混在している前記異物の捕集率が高まる圧縮部位30を濾材20の任意の部位に作り出し(図1、図2)、各種寸法差のある異物を当該濾材20の全体に亘り捕集し得るよう構成されている。
【0013】
そして、濾材20を収容部16より大きく形成するに際しては、前記フィルタケース10の長さ方向における前記濾材20と前記収容部16との寸法差が、前記導入口12の側より前記排出口14の側がより大きくなるように設定し、これにより前記濾材20に作り出される前記圧縮部位30の圧縮度合を、該導入口12の側より該排出口14の側の方が大きくなるようにする。すなわち、均一密度の多孔質体から形成されている濾材20は、周知の如く、圧縮度合が大きくなるほど内部の空隙が押し潰され、これにより小さいサイズの異物を捕集し得るようになる。従って、前記導入口12の側では圧縮度合を小さくして(または非圧縮状態として)大きいサイズの異物が捕集されるようにする一方、前記排出口14の側へ近づく程に段階的または連続的に圧縮度合を大きくして、より小さいサイズの異物が順次捕集されるようにすることが可能となる。
【0014】
このような前提条件のもとで形成された第1実施例の流体フィルタFLにおける濾材20は、図3および図4に示すように、フィルタケース10の長手方向に沿って3等分(第1部分22、第2部分24、第3部分26)に区分したもとで、長さ寸法L、幅寸法W、高さ寸法Hからなる前記収容部16に対し、長さ寸法Aおよび幅寸法Bは基本的に同一に設定し、厚さ寸法Cだけを適宜大きく設定してある。具体的には、前記導入口12に隣接するようになる第1部分22は、前記収容部16の高さ寸法Hと略同一の厚さ寸法C1に設定され、導入口12と排出口14との間に位置するようになる第2部分24は、該収容部16の高さ寸法Hの略2倍となる厚さ寸法C2に設定され、更に排出口14に隣接するようになる第3部分は、該収容部16の高さ寸法Hの略3倍となる厚さ寸法C3に設定されている。
【0015】
これにより、前記濾材20を挟んで前記第1半体10Aおよび第2半体10Bを組付けるに際しては(図4(a))、前記第1部分22は全く圧縮されない非圧縮部位とされ、前記第2部分24は約1/2に圧縮されて第1圧縮部位30A(圧縮部位30)とされ、前記第3部分26は約1/3に圧縮されて第2圧縮部位30B(圧縮部位30)とされる(図4(b))。従って、図5に表示するように、前記収容部16へ収容される前の濾材20の密度を「原密度」とすると(破線表示)、前記第1部分22の密度は原密度と同一であり、第2部分24(第1圧縮部位30A)の密度は原密度の2倍程度となり、前記第3部分26(第2圧縮部位30B)の密度は原密度の3倍程度となる(実線表示)。
【0016】
このように第1実施例の流体フィルタFLでは、前記フィルタケース10の長さ方向における前記濾材20と前記収容部16との寸法差が、前記導入口12の側から前記排出口14の側に向けて段階的(ここでは3段)に大きくなるなるように設定してあるため、前記濾材20に作り出される前記圧縮部位30の圧縮度合も、該導入口12の側から該排出口14の側に向けて段階的に大きくなっている。これにより、前記導入口12から収容部16内へ導入された流体が濾材20内を通過して前記排出口14に向けて移動する過程で、前記第1部分22では、比較的大きいサイズの異物だけが捕集され、中間サイズの異物および小さいサイズの異物は該第1部分22を通過する。そして前記第2部分24(第1圧縮部位30A)では、前記第1部分22を通過した中間サイズの異物が捕集され、小さいサイズの異物は該第2部分24(第1圧縮部位30A)を通過する。更に、前記第3部分26(第2圧縮部位30B)では、前記第1部分22および第2部分24を通過した全ての小さいサイズの異物が捕集される。
【0017】
従って第1実施例の流体フィルタFLでは、前記導入口12からフィルタケース10へ導入した流体に大小様々なサイズの異物が混在している場合でも、前記濾材における前記導入口12に隣接した第1部分22では比較的大きいサイズの異物が捕集され、第2部分24および第3部分26では、これより小さいサイズの異物が順次捕集されるようになる。すなわち、流体に混在する前記異物に寸法差があったとしても、サイズに応じて捕集される部位が少しずつ異なるから、各種寸法差のある前記異物を濾材20の全体に亘り捕集することができ、捕集率を好適に向上させることができる。しかも、濾材20の一部分に異物が集中して捕集されないから、該濾材20を通過する流体のスムーズな流動が維持されて圧力損失を最小限に抑えることもできる。
【0018】
このように第1実施例の流体フィルタFLは、全体的に均一密度に発泡成形されたウレタンフォームからなる濾材20の外部寸法を前記収容部16の内部容積よりも適宜大きく設定し、該収容部16へ該濾材20を圧縮的に収容するようにして、前記異物の捕集率が高まる圧縮部位30(第1圧縮部位30A、第2圧縮部位30B)を意図的に作り出すようにしたことで、単一の濾材20だけを使用したにも拘らず、密度の異なる(捕集率の異なる)複数の濾材を使用した場合と同等乃至それ以上の捕集性能を得ることができる。これにより、低コストで異物の捕集率を好適に向上させることができる。
【0019】
なお、図1、図2、図4(b)および図5では、第1部分22(非圧縮部位)、第2部分24(第1圧縮部位30A)および第3部分26(第2圧縮部位30B)の境界部分では、夫々の部位における密度が急激に変化しているように図示表示したが、実際には、各部分22,24,25の境界部分における密度は徐々に変化するようになる。
【0020】
また、前記第1部分22と第2部分24との境界部分や、第2部分24と第3部分26との境界部分に、適宜深さの切込み(スリット)を形成するようにすれば、第2部分24の圧縮変形が第1部分22へ直接的に影響を及ぼさないと共に、第3部分の圧縮変形が第2部分24へ直接的に影響を及ぼさない。
【0021】
【第2実施例】
図6は、第2実施例に係る流体フィルタの分解斜視図、図7は第2実施例の流体フィルタFLを組立てる状態を概略的に示した縦断側面図であって、この第2実施例の流体フィルタFLは、フィルタケース10は同一のものが使用され、濾材20の形状のみを変更したものである。この濾材20は、長さ寸法L、幅寸法W、高さ寸法Hからなる前記収容部16に対し、長さ寸法Aおよび幅寸法Bは基本的に同一に設定し、厚さ寸法Cだけを適宜大きく設定してある。具体的には、前記導入口12に隣接する第1端部32の側は、前記収容部16の高さ寸法Hと略同一の厚さ寸法C1とされ、排出口14に隣接する第2端部34の側は、該収容部16の高さ寸法Hの略3倍となる厚さ寸法C3とされ、第1端部32から第2端部34に向けて徐々に厚さが大きくなっている所謂倒伏台形状を呈している。すなわち第2実施例の流体フィルタFLでは、前記フィルタケース10の長さ方向における前記濾材20と前記収容部16との寸法差が、前記導入口12の側から前記排出口14の側に向けて連続的、すなわち直線的に大きくなるように設定してある。
【0022】
これにより、前記濾材20を挟んで前記第1半体10Aおよび第2半体10Bを組付けるに際しては(図7(a))、前記導入口12に隣接する第1端部32の近傍部位は殆ど圧縮されず、この第1端部32から離間するに比例して徐々に(連続的に)圧縮度合が高まって中間部位では約1/2に圧縮され、更に前記排出口14に隣接する第2端部34の近傍部位は約1/3に圧縮されている(図7(b))。従って、収容部16に圧縮的に収容された前記濾材20に作り出される圧縮部位30の圧縮度合は、前記導入口12の側から前記排出口14の側に向けて連続的に大きくなっており、これにより該濾材20の密度は、図5に1点鎖線で示すように、導入口12の側から排出口14の側に向けて連続的に高くなり、第1端部32の近傍部位の密度は原密度と同一であり、第2端部34の近傍部位の密度は原密度の3倍程度となっている。
【0023】
従って第2実施例の流体フィルタFLでは、前記導入口12からフィルタケース10へ導入した流体に大小様々なサイズの異物が混在している場合でも、前記濾材における前記導入口12に隣接した部位では比較的大きいサイズの異物が捕集され、排出口14側に近づくにつれてより小さいサイズの異物が順次捕集されるようになる。すなわち、流体に混在する前記異物に寸法差があったとしても、サイズに応じて捕集される部位が少しずつ異なるから、各種寸法差のある前記異物を濾材20の全体に亘り捕集することができ、捕集率を好適に向上させることができる。しかも、濾材20の一部分に異物が集中して捕集されないから、該濾材20を通過する流体のスムーズな流動が維持されて圧力損失を最小限に抑えることもできる。
【0024】
【第3実施例】
図8は、第3実施例に係る流体フィルタの分解斜視図、図9は第3実施例の流体フィルタFLを組立てる状態を概略的に示した縦断側面図であって、この第3実施例の流体フィルタFLも、フィルタケース10の変更はなく、濾材20の形状のみを変更したものである。この濾材20は、長さ寸法L、幅寸法W、高さ寸法Hからなる前記収容部16に対し、長さ寸法Aおよび幅寸法Bは基本的に同一に設定し、厚さ寸法Cだけを適宜大きく設定してある。具体的には、前記導入口12に隣接する第1端部32の側は、前記収容部16の高さ寸法Hと略同一の厚さ寸法C1とされ、排出口14に隣接する第2端部34の側は、該収容部16の高さ寸法Hの略3倍となる厚さ寸法C3とされ、第1端部32から第2端部34に向けて不規則的に厚さが大きくなっている所謂流線形状を呈している。すなわち第3実施例の流体フィルタFLでは、前記フィルタケース10の長さ方向における前記濾材20と前記収容部16との寸法差が、前記導入口12の側から前記排出口14の側に向けて連続的、すなわち非直線的(曲線的)に大きくなるように設定してある。
【0025】
これにより、前記濾材20を挟んで前記第1半体10Aおよび第2半体10Bを組付けるに際しては(図9(a))、前記導入口12に隣接する第1端部32の近傍部位は殆ど圧縮されず、この第1端部32から離間するにつれて不規則的に圧縮度合が高まり、前記排出口14に隣接する第2端部34の近傍部位は約1/3に圧縮されている(図9(b))。従って、収容部16に圧縮的に収容された前記濾材20に作り出される圧縮部位30の圧縮度合は、前記導入口12の側から前記排出口14の側に向けて不規則的に大きくなっており、これにより該濾材20の密度は、図5に2点鎖線で示すように、導入口12の側から排出口14の側に向けて不規則的に高くなる。但し、第1端部32の近傍部位の密度は原密度と同一であり、第2端部34の近傍部位の密度は原密度の3倍程度となっている。
【0026】
このような第3実施例の流体フィルタFLにあっても、前記導入口12からフィルタケース10へ導入した流体に大小様々なサイズの異物が混在している場合でも、前記濾材における前記導入口12に隣接した部位では比較的大きいサイズの異物が捕集され、排出口14側に近づくにつれてより小さいサイズの異物が順次捕集されるようになる。すなわち、流体に混在する前記異物に寸法差があったとしても、サイズに応じて捕集される部位が少しずつ異なるから、各種寸法差のある前記異物を濾材20の全体に亘り捕集することができ、捕集率を好適に向上させることができる。しかも、濾材20の一部分に異物が集中して捕集されないから、該濾材20を通過する流体のスムーズな流動が維持されて圧力損失を最小限に抑えることもできる。
【0027】
なお本願の流体フィルタFLは、前述した第1実施例〜第3実施例に例示した矩形状のものに限定されるものではなく、対象とする流体(気体、液体)の性状や混在している異物の性状、フィルタケース10の形状・サイズ、濾材20の材質等の様々な条件により、種々の形状・サイズに形成し得ることは勿論である。
【0028】
本願の濾材20を構成する多孔質体とは、前述した如く、前記各実施例に例示した連泡構造を有するウレタンフォームに限定されるものではなく、これ以外に、樹脂(ゴムおよびプラスチック等)の連泡体、不織布、繊維集合体(プラスチック、無機物、金属等から形成されるもの)等も好適に実施可能である。
【0029】
【発明の効果】
以上に説明した如く、本発明に係る流体フィルタによれば、全体的に均一密度とされる濾材の外部寸法を、ケース体における収容部の内部容積よりも適宜大きく設定し、該収容部へ該濾材を圧縮的に収容するようにして、異物の捕集率が高まる圧縮部位を任意の部位に作り出すようにしたことで、単一の濾材だけを使用したにも拘らず、密度の異なる(捕集率の異なる)複数の濾材を使用した場合と同等乃至それ以上の捕集性能を得ることができる有益な効果を奏する。これにより、低コストで異物の捕集率を好適に向上させることができる利点がある。
そして、前記濾材と前記収容部との寸法差が、ケース体の導入口の側から排出口の側に向けて大きくなるなるように設定してあるため、流体に混在する異物に寸法差があったとしても、サイズに応じて捕集される部位が少しずつ異なるから、各種寸法差のある異物を濾材の全体に亘り捕集することができ、捕集率を好適に向上させることができる等の利点もある。
なお濾材としては、連泡構造を有する合成樹脂製の連泡体、不織布または繊維集合体等からなる多孔質体が好適に採用可能である。
【図面の簡単な説明】
【図1】第1実施例に係る流体フィルタを概略的に示す縦断側面図である。
【図2】第1実施例に係る流体フィルタを概略的に示す横断平面図である。
【図3】第1実施例に係る流体フィルタの分解斜視図である。
【図4】(a)は、濾材を挟んでフィルタケースを組付ける前の状態を示した断面図、(b)は、濾材を適宜圧縮させつつフィルタケースを組付けた状態を示した断面図である。
【図5】第1実施例〜第3実施例における濾材の密度分布を示したグラフである。
【図6】第2実施例に係る流体フィルタの分解斜視図である。
【図7】(a)は、濾材を挟んでフィルタケースを組付ける前の状態を示した断面図、(b)は、濾材を適宜圧縮させつつフィルタケースを組付けた状態を示した断面図である。
【図8】第3実施例に係る流体フィルタの分解斜視図である。
【図9】(a)は、濾材を挟んでフィルタケースを組付ける前の状態を示した断面図、(b)は、濾材を適宜圧縮させつつフィルタケースを組付けた状態を示した断面図である。
【図10】流体フィルタを装着した装置の概略図である。
【図11】目が粗い単一の濾材をフィルタケースに収容して構成される従来実施の流体フィルタの縦断側面図である。
【図12】目が細かい単一の濾材をフィルタケースに収容して構成される従来実施の流体フィルタの縦断側面図である。
【図13】目が粗い第1濾材および目が細かい第2濾材をフィルタケースに収容して構成される従来実施の流体フィルタの縦断側面図である。
【図14】目が粗い第1濾材および目が細かい第2濾材をフィルタケースに収容して構成される従来実施の流体フィルタの縦断側面図である。
【図15】図11または図12に示した流体フィルタの分解斜視図であって、フィルタケースに内部画成された収容部の内部容積と濾材の外部寸法とが、同一に設定されていることを示している。
【図16】図13に示した流体フィルタの分解斜視図であって、フィルタケースに内部画成された収容部の内部容積と、第1濾材および第2濾材を合体させた際の外部寸法とが、同一に設定されていることを示している。
【図17】図14に示した流体フィルタの分解斜視図であって、フィルタケースに内部画成された収容部の内部容積と、第1濾材および第2濾材を合体させた際の外部寸法とが、同一に設定されていることを示している。
【符号の説明】
10 ケース体
12 導入口
14 排出口
16 収容部
20 濾材
30 圧縮部位
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a fluid filter, and more specifically, a case body in which an inlet and an outlet for a fluid are opened at required positions and a housing portion communicating with the inlet and the outlet is defined therein, The present invention relates to a fluid filter made of a porous body having elasticity and uniform density, and a filter medium detachably accommodated in the accommodation section.
[0002]
[Prior art]
For example, in various devices utilizing a gas such as air or gas or a liquid such as oil such as an air purifier, an automobile engine, or a fluid pressure cylinder (hereinafter, gas and liquid are collectively referred to as "fluid"). As shown in FIG. 10, a fluid filter FL for collecting fine foreign matter (dust, dust, etc.) mixed in the fluid and purifying the fluid is provided to the fluid introduction section M1 of the apparatus M. Often worn. This fluid filter FL has been developed and put into practical use in various forms and types. For example, as shown in FIG. 11, a fluid inlet 12 and a fluid outlet 14 are opened at required positions, and these fluid filters FL are introduced. A filter case (case body) 10 in which a housing section 16 communicating with the port 12 and the discharge port 14 is defined, and a porous body having a uniform density and a moderate elasticity are made of a material, and are detachably attached to the housing section 16. And a filter medium 20 accommodated in the filter medium. Then, the fluid introduced from the introduction port 12 into the storage unit 16 is passed through the filter medium 20 to collect fine foreign substances mixed in the fluid, and the purified fluid is discharged from the discharge port 14. It has become.
[0003]
Here, as the filter medium 20, for example, a so-called "porous body" having a large number of pores (voids), such as an open-cell foam made of a synthetic resin such as a sponge or urethane foam having an open-cell structure, a nonwoven fabric, or a fiber aggregate. Although it can be suitably implemented, the dispersion mode and the pressure loss change depending on the density of the filter medium 20 (the opening size and the number of formed voids), which affects the collection rate of foreign substances mixed in the fluid. ing. For example, FIG. 11 is a configuration cross-sectional view of a fluid filter FL in which a filter medium 20 having a low density (a so-called “coarse” in which the opening size of each gap is formed large and so-called “coarse”) is implemented, FIG. 12 is a cross-sectional view of the configuration of the fluid filter FL in which the filter medium 20 having a high density (a so-called “fine” in which the opening size of each space is formed small) is implemented with a uniform density.
[0004]
In the fluid filter FL shown in FIG. 11, since the entire filter medium 20 is uniformly coarse, there is an advantage that the pressure loss is reduced and foreign matter is appropriately dispersed and collected in the entire filter medium 20. However, since a foreign substance having a size smaller than the gap passes without being collected, there is an inherent disadvantage that the fluid cannot be reliably cleaned. On the other hand, the fluid filter FL shown in FIG. 12 has the advantage of being able to collect a considerably fine foreign substance because the entire filter medium 20 is uniformly fine, but has the disadvantage of increasing the pressure loss. At the same time, foreign matters of various sizes are intensively collected at the portion of the filter medium 20 facing the inlet 12, so that foreign matters having various dimensional differences are not collected over the entire filter medium 20 for a short time. The inherent drawback of clogging was inherent.
[0005]
Therefore, in order to efficiently collect foreign substances of various sizes, for example, as shown in FIG. 13 or FIG. 14, a first filter medium 20A made of a porous material having a low density (coarse) and By combining with the second filter medium 20B made of a porous material having a higher density (finer) than the first filter medium 20A, a large foreign matter is collected by the first filter medium 20A, and a small foreign matter is collected by the second filter medium. A fluid filter FL designed to collect at 20B has also been proposed. However, since the density rapidly changes at the boundary between the first filter medium 20A and the second filter medium 20B, most of the foreign substances not collected by the first filter medium 20A are intensively collected on the outer surface of the second filter medium 20B. As a result, foreign matters cannot be collected over the entirety of each of the filter media 20A and 20B, and pressure loss cannot be minimized. Therefore, there is still a problem to be solved in order to improve the collection rate. Have been.
[0006]
[Problems to be solved by the invention]
By the way, in the conventional fluid filter FL shown in FIGS. 11 and 12 and the improved fluid filter FL shown in FIGS. 13 and 14, it is easy to partially compressively deform and the degree of compression of the compressed portion is reduced. There was no technical idea to improve the collection rate of the filter medium 20 by taking advantage of the characteristics of the porous body that the density can be freely changed in accordance with it. For example, in the conventional fluid filter FL shown in FIGS. 11 and 12, as shown in FIG. 15, since the outer shape of the filter medium 20 is the same as the inner shape of the housing portion 16, Since the filter medium 20 is stored and held in the storage section 16 without being compressed, there is a limit to improving the collection rate because the filter medium 20 has a uniform density as a whole. Further, the conventional fluid filter FL shown in FIGS. 13 and 14 also has an external shape in which the first filter medium 20A and the second filter medium 20B are united, as shown in FIGS. 16 and 17, respectively. Since the filter media 20A and 20B have the same shape, the respective filter media 20A and 20B are stored and held in the storage section 16 without any compression, and the respective filter media 20A and 20B are trapped with a uniform density as a whole. There was a limit to improving the concentration.
[0007]
[Object of the invention]
The present invention has been proposed in view of the above-mentioned problems inherent in the prior art, and has been proposed to appropriately solve the problem. The present invention compressively stores a filter medium in a storage portion defined inside a case body. By doing so, a compressed portion where the collection rate of foreign matter is increased is created at an arbitrary portion of the filter medium, whereby foreign matter of various sizes mixed in the fluid can be collected over the entire filter medium. It is an object of the present invention to provide a fluid filter which is provided.
[0008]
[Means for Solving the Problems]
In order to solve the above problems and achieve the intended purpose, the present invention provides a case in which a fluid inlet and a drain are opened at required positions, and a housing portion communicating with the inlet and the drain is defined therein. And a filter medium which is made of a porous body of a uniform density having an appropriate elasticity, and is made of a filter medium which is removably housed in the housing part, and allows the fluid introduced from the inlet to the housing part to pass through the filter medium. In the fluid filter configured to collect fine foreign matters mixed in the fluid and discharge the purified fluid from the discharge port, the external dimensions of the filter medium before being stored in the storage unit are determined. , Set appropriately larger than the internal volume of the storage section,
By compressively storing the filter medium in the storage section, a compressed portion where the collection rate of the foreign matter is increased is created at an arbitrary part of the filter medium, and thereby the foreign matter having various dimensional differences is entirely applied to the filter medium. It is characterized in that it is configured to be able to collect over the whole area.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, a fluid filter according to the present invention will be described below with reference to the accompanying drawings by way of preferred embodiments. Note that, in the embodiment, in order to facilitate understanding, the same shape as the conventional fluid filter FL shown in FIGS. 11 to 17 will be exemplified. Therefore, the same members and parts as those described above are designated by the same reference numerals.
[0010]
[First embodiment]
1 is a longitudinal side view schematically showing a fluid filter according to a first embodiment, FIG. 2 is a cross-sectional plan view schematically showing the fluid filter shown in FIG. 1, and FIG. 3 is an exploded perspective view of the fluid filter. It is. The fluid filter FL according to the first embodiment has a filter case in which a fluid inlet 12 and a fluid outlet 14 are opened at required positions and a housing 16 communicating with the fluid inlet 12 and the fluid outlet 14 is defined therein. A case body 10 and a filter medium 20 made of a porous material having an appropriate elasticity and a uniform density, and removably accommodated in the accommodating portion 16. In this embodiment, a urethane foam having an open-cell structure is exemplified as the porous body. However, a porous body that can be used as the filter medium 20 of the present application is not limited to the urethane foam but may be a resin (rubber, plastic, or the like). Foams, non-woven fabrics, fiber aggregates (formed from plastics, inorganic materials, metals, and the like) are also included.
[0011]
The filter case 10 is basically the same as that illustrated in FIG. 11 and the like, and is composed of a tray-like first half 10A and a tray-like second half 10B. 10A and the second half 10B are assembled to each other in a direction in which the openings are opposed to each other to form a rectangular box shape, and a rectangular shape (length L, width W for accommodating the filter medium 20). , A receiving portion 16 having a height H) is defined therein. A laterally-long inlet port 12 for allowing a fluid to flow into the housing portion 16 is opened at one side of the first half 10A, and at one side of the second half 10B. A horizontally elongated discharge port 14 is provided to allow the fluid in the storage section 16 to flow out of the case. When the first half 10A and the second half 10B are assembled as shown in FIG. 1, the inlet 12 is opened at the lower left end portion of the filter case 10 and the upper right end of the filter case 10 is opened. The outlet port 14 is opened at the position, and the fluid introduced into the filter case 10 from the inlet port 12 flows from one end to the other end in the housing portion 16 and then flows from the outlet port 14 to the filter case. It is discharged out of the case 10.
[0012]
The filter medium 20 is made of urethane foam, which is a porous body having an open-cell structure, and its external dimensions at least before being stored in the storage section 16 are appropriately set larger than the internal volume of the storage section 16. . Thereby, as described later, by being compressed and stored in the storage portion 16, the compressed portion 30 where the collection rate of the foreign matter mixed in the fluid is increased can be changed to an arbitrary portion of the filter medium 20. (FIGS. 1 and 2) so as to collect foreign matters having various dimensional differences over the entirety of the filter medium 20.
[0013]
When the filter medium 20 is formed to be larger than the storage section 16, the dimensional difference between the filter medium 20 and the storage section 16 in the length direction of the filter case 10 is different from the introduction port 12 side of the discharge port 14. The side is set to be larger, so that the degree of compression of the compression portion 30 created in the filter medium 20 is larger on the side of the outlet 14 than on the side of the inlet 12. That is, as is well known, as the degree of compression increases, the inner space of the filter medium 20 formed of a porous body having a uniform density is crushed, so that foreign substances of a smaller size can be collected. Accordingly, the degree of compression is reduced (or in a non-compressed state) on the side of the inlet 12 so as to collect a large-sized foreign substance, while gradually or continuously as it approaches the side of the outlet 14. Thus, it is possible to increase the degree of compression in order to collect foreign substances of smaller size sequentially.
[0014]
The filter medium 20 in the fluid filter FL of the first embodiment formed under such preconditions is divided into three equal parts along the longitudinal direction of the filter case 10 (first part) as shown in FIGS. The storage portion 16 having the length L, the width W, and the height H is divided into the portion 22, the second portion 24, and the third portion 26). Are basically set to be the same, and only the thickness dimension C is set appropriately large. Specifically, the first portion 22 that is adjacent to the inlet 12 is set to have a thickness C1 substantially equal to the height H of the housing 16, and the first portion 22 is connected to the outlet 12 and the outlet 14. The second portion 24 which is located between the second portion 24 and the third portion which is set to a thickness dimension C2 which is approximately twice the height dimension H of the accommodation portion 16 and which is further adjacent to the discharge port 14 Is set to a thickness dimension C3 which is approximately three times the height dimension H of the housing section 16.
[0015]
Thereby, when assembling the first half 10A and the second half 10B with the filter medium 20 interposed therebetween (FIG. 4A), the first portion 22 is a non-compressed part that is not compressed at all, and The second portion 24 is compressed to about a half to form a first compression section 30A (compression section 30), and the third section 26 is compressed to about 1/3 to a second compression section 30B (compression section 30). (FIG. 4B). Therefore, as shown in FIG. 5, when the density of the filter medium 20 before being stored in the storage unit 16 is defined as “original density” (shown by a broken line), the density of the first portion 22 is the same as the original density. The density of the second portion 24 (the first compressed portion 30A) is about twice the original density, and the density of the third portion 26 (the second compressed portion 30B) is about three times the original density (indicated by a solid line). .
[0016]
As described above, in the fluid filter FL of the first embodiment, the dimensional difference between the filter medium 20 and the storage portion 16 in the length direction of the filter case 10 is changed from the inlet 12 side to the discharge port 14 side. The degree of compression of the compression portion 30 created in the filter medium 20 also increases from the side of the inlet 12 to the side of the outlet 14 because the size of the compression portion 30 is set to increase stepwise (here, three steps). It is gradually increasing toward. Accordingly, in the process in which the fluid introduced from the introduction port 12 into the storage portion 16 passes through the filter medium 20 and moves toward the discharge port 14, the first portion 22 has a relatively large size foreign matter. Only the foreign matter of the medium size and the foreign matter of the small size pass through the first part 22. Then, in the second portion 24 (the first compressed portion 30A), the intermediate-sized foreign matter that has passed through the first portion 22 is collected, and the small-sized foreign matter passes through the second portion 24 (the first compressed portion 30A). pass. Further, in the third portion 26 (the second compression portion 30B), all small-sized foreign matters that have passed through the first portion 22 and the second portion 24 are collected.
[0017]
Therefore, in the fluid filter FL of the first embodiment, even if foreign matter of various sizes is mixed in the fluid introduced into the filter case 10 from the inlet 12, the first filter adjacent to the inlet 12 in the filter medium. The portion 22 collects relatively large foreign matters, and the second portion 24 and the third portion 26 sequentially collect smaller foreign matters. In other words, even if there is a dimensional difference in the foreign matter mixed in the fluid, the part to be collected is slightly different depending on the size. Therefore, it is necessary to collect the foreign matter having various dimensional differences over the entire filter medium 20. And the collection rate can be suitably improved. In addition, since foreign matters are not concentrated and collected on a part of the filter medium 20, a smooth flow of the fluid passing through the filter medium 20 is maintained, and the pressure loss can be minimized.
[0018]
As described above, in the fluid filter FL of the first embodiment, the external dimensions of the filter medium 20 made of urethane foam foamed and formed to have a uniform density as a whole are appropriately set to be larger than the internal volume of the storage section 16. By compressing the filter medium 20 to 16 and intentionally creating the compressed portions 30 (the first compressed portions 30A and the second compressed portions 30B) at which the collection rate of the foreign matter is increased, In spite of using only a single filter medium 20, it is possible to obtain a collection performance equal to or higher than the case where a plurality of filter mediums having different densities (having different collection rates) are used. Thereby, the collection rate of foreign substances can be suitably improved at low cost.
[0019]
1, 2, 4 (b) and 5, the first portion 22 (non-compressed portion), the second portion 24 (first compressed portion 30A), and the third portion 26 (second compressed portion 30B). In the boundary portion of ()), the density at each portion is illustrated and displayed as rapidly changing. However, in actuality, the density at the boundary portion between the portions 22, 24, and 25 gradually changes.
[0020]
In addition, if a notch (slit) having an appropriate depth is formed at the boundary between the first part 22 and the second part 24 and at the boundary between the second part 24 and the third part 26, The compressive deformation of the second part 24 does not directly affect the first part 22, and the compressive deformation of the third part does not directly affect the second part 24.
[0021]
[Second embodiment]
FIG. 6 is an exploded perspective view of the fluid filter according to the second embodiment, and FIG. 7 is a longitudinal sectional side view schematically showing a state in which the fluid filter FL of the second embodiment is assembled. The same filter case 10 is used for the fluid filter FL, and only the shape of the filter medium 20 is changed. In this filter medium 20, the length dimension A and the width dimension B are basically set to be the same with respect to the accommodation portion 16 having the length dimension L, the width dimension W, and the height dimension H, and only the thickness dimension C is set. It is set large as appropriate. Specifically, the side of the first end 32 adjacent to the inlet 12 has a thickness C1 substantially equal to the height H of the housing 16 and the second end 32 adjacent to the outlet 14. The side of the portion 34 has a thickness dimension C3 that is approximately three times the height dimension H of the storage section 16, and the thickness gradually increases from the first end 32 toward the second end 34. It has a so-called falling trapezoidal shape. That is, in the fluid filter FL of the second embodiment, the dimensional difference between the filter medium 20 and the storage section 16 in the longitudinal direction of the filter case 10 is increased from the inlet 12 to the outlet 14. It is set to increase continuously, that is, linearly.
[0022]
Thereby, when assembling the first half 10A and the second half 10B with the filter medium 20 interposed therebetween (FIG. 7A), the portion near the first end 32 adjacent to the inlet 12 is It is hardly compressed, and the degree of compression gradually (continuously) increases in proportion to the distance from the first end portion 32, and is compressed to about 中間 at the intermediate portion, and further to the second portion adjacent to the outlet 14. The area near the second end 34 is compressed to about 1/3 (FIG. 7B). Therefore, the degree of compression of the compression portion 30 created in the filter medium 20 compressively accommodated in the accommodating portion 16 continuously increases from the side of the inlet 12 toward the side of the outlet 14, As a result, the density of the filter medium 20 continuously increases from the side of the inlet 12 to the side of the outlet 14 as indicated by a one-dot chain line in FIG. Is the same as the original density, and the density near the second end portion 34 is about three times the original density.
[0023]
Therefore, in the fluid filter FL of the second embodiment, even when foreign matters having various sizes are mixed in the fluid introduced into the filter case 10 from the inlet 12, a portion of the filter medium adjacent to the inlet 12 in the filter medium. Foreign matter having a relatively large size is collected, and foreign matter having a smaller size is sequentially collected as approaching the discharge port 14 side. In other words, even if there is a dimensional difference in the foreign matter mixed in the fluid, the part to be collected is slightly different depending on the size. Therefore, it is necessary to collect the foreign matter having various dimensional differences over the entire filter medium 20. And the collection rate can be suitably improved. In addition, since foreign matters are not concentrated and collected on a part of the filter medium 20, a smooth flow of the fluid passing through the filter medium 20 is maintained, and the pressure loss can be minimized.
[0024]
[Third embodiment]
FIG. 8 is an exploded perspective view of the fluid filter according to the third embodiment, and FIG. 9 is a vertical sectional side view schematically showing a state in which the fluid filter FL of the third embodiment is assembled. In the fluid filter FL, the filter case 10 is not changed, and only the shape of the filter medium 20 is changed. In this filter medium 20, the length dimension A and the width dimension B are basically set to be the same with respect to the accommodation portion 16 having the length dimension L, the width dimension W, and the height dimension H, and only the thickness dimension C is set. It is set large as appropriate. Specifically, the side of the first end 32 adjacent to the inlet 12 has a thickness C1 substantially equal to the height H of the housing 16 and the second end 32 adjacent to the outlet 14. The side of the portion 34 has a thickness dimension C3 that is approximately three times the height dimension H of the storage section 16, and the thickness increases irregularly from the first end 32 to the second end 34. So-called streamline shape. That is, in the fluid filter FL of the third embodiment, the dimensional difference between the filter medium 20 and the storage section 16 in the longitudinal direction of the filter case 10 is increased from the inlet 12 to the outlet 14. It is set to increase continuously, that is, nonlinearly (curvilinearly).
[0025]
Thereby, when assembling the first half 10A and the second half 10B with the filter medium 20 interposed therebetween (FIG. 9A), the portion near the first end 32 adjacent to the inlet 12 is It is hardly compressed, and the degree of compression increases irregularly as the distance from the first end 32 increases, and the portion near the second end 34 adjacent to the outlet 14 is compressed to about 1/3 ( FIG. 9 (b). Accordingly, the degree of compression of the compression portion 30 created in the filter medium 20 compressively accommodated in the accommodating portion 16 is irregularly increased from the side of the inlet 12 toward the side of the outlet 14. As a result, the density of the filter medium 20 increases irregularly from the inlet 12 to the outlet 14 as shown by a two-dot chain line in FIG. However, the density near the first end 32 is the same as the original density, and the density near the second end 34 is about three times the original density.
[0026]
Even in the fluid filter FL of the third embodiment, even when the fluid introduced from the inlet 12 into the filter case 10 contains foreign matters of various sizes, the inlet 12 A relatively large size foreign matter is collected in a portion adjacent to the discharge port 14, and smaller size foreign matter is sequentially collected as approaching the discharge port 14 side. In other words, even if there is a dimensional difference in the foreign matter mixed in the fluid, the part to be collected is slightly different depending on the size. Therefore, it is necessary to collect the foreign matter having various dimensional differences over the entire filter medium 20. And the collection rate can be suitably improved. In addition, since foreign matters are not concentrated and collected on a part of the filter medium 20, a smooth flow of the fluid passing through the filter medium 20 is maintained, and the pressure loss can be minimized.
[0027]
In addition, the fluid filter FL of the present application is not limited to the rectangular filter illustrated in the first to third embodiments described above, but has the properties and mixed properties of the target fluid (gas, liquid). Of course, it can be formed into various shapes and sizes depending on various conditions such as the properties of the foreign matter, the shape and size of the filter case 10, and the material of the filter medium 20.
[0028]
As described above, the porous body constituting the filter medium 20 of the present application is not limited to the urethane foam having the open-cell structure illustrated in each of the above-described embodiments, but may be a resin (rubber, plastic, or the like). , A non-woven fabric, a fiber aggregate (formed from plastic, inorganic material, metal, etc.) can also be suitably implemented.
[0029]
【The invention's effect】
As described above, according to the fluid filter of the present invention, the external dimensions of the filter medium having a uniform density as a whole are appropriately set to be larger than the internal volume of the storage portion in the case body, and By compressively storing the filter media and creating a compressed site at an arbitrary site where the collection rate of foreign substances is increased, the density of the filter media is different even though only a single filter media is used. There is an advantageous effect that a collecting performance equal to or higher than the case of using a plurality of filter media having different collecting rates can be obtained. Thereby, there is an advantage that the collection rate of foreign matter can be suitably improved at low cost.
Since the dimensional difference between the filter medium and the storage section is set to increase from the inlet side to the outlet side of the case body, there is a dimensional difference between the foreign substances mixed in the fluid. Even so, since the portion to be collected is slightly different depending on the size, foreign substances having various dimensional differences can be collected over the entire filter medium, and the collection rate can be suitably improved. There are also advantages.
As the filter medium, a synthetic resin open cell having an open cell structure, a porous body made of a nonwoven fabric, a fiber aggregate, or the like can be suitably used.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view schematically showing a fluid filter according to a first embodiment.
FIG. 2 is a cross-sectional plan view schematically showing the fluid filter according to the first embodiment.
FIG. 3 is an exploded perspective view of the fluid filter according to the first embodiment.
FIG. 4A is a cross-sectional view illustrating a state before a filter case is assembled with a filter medium interposed therebetween, and FIG. 4B is a cross-sectional view illustrating a state where the filter case is assembled while appropriately compressing the filter medium. It is.
FIG. 5 is a graph showing the density distribution of the filter medium in the first to third examples.
FIG. 6 is an exploded perspective view of a fluid filter according to a second embodiment.
FIG. 7A is a cross-sectional view illustrating a state before a filter case is assembled with a filter medium interposed therebetween, and FIG. 7B is a cross-sectional view illustrating a state where the filter case is assembled while appropriately compressing the filter medium. It is.
FIG. 8 is an exploded perspective view of a fluid filter according to a third embodiment.
9A is a cross-sectional view showing a state before a filter case is assembled with a filter medium interposed therebetween, and FIG. 9B is a cross-sectional view showing a state where the filter case is assembled while appropriately compressing the filter medium. It is.
FIG. 10 is a schematic view of an apparatus equipped with a fluid filter.
FIG. 11 is a longitudinal sectional side view of a conventional fluid filter configured to house a single coarse filter medium in a filter case.
FIG. 12 is a longitudinal sectional side view of a conventional fluid filter configured to house a single fine filter medium in a filter case.
FIG. 13 is a vertical cross-sectional side view of a conventional fluid filter constituted by accommodating a coarse first filter medium and a fine second filter medium in a filter case.
FIG. 14 is a vertical cross-sectional side view of a conventional fluid filter constituted by accommodating a coarse first filter medium and a fine second filter medium in a filter case.
FIG. 15 is an exploded perspective view of the fluid filter shown in FIG. 11 or 12, wherein an inner volume of a housing portion defined inside a filter case and an outer dimension of a filter medium are set to be the same; Is shown.
FIG. 16 is an exploded perspective view of the fluid filter shown in FIG. 13, showing an internal volume of a storage portion defined inside a filter case, an external dimension when the first filter medium and the second filter medium are combined, and Indicates that the settings are the same.
FIG. 17 is an exploded perspective view of the fluid filter shown in FIG. 14, illustrating an internal volume of a storage part defined inside a filter case, an external dimension when the first filter medium and the second filter medium are combined, and Indicates that the settings are the same.
[Explanation of symbols]
10 Case body
12 Inlet
14 outlet
16 accommodation
20 Filter media
30 compression part

Claims (7)

所要位置に流体の導入口(12)および排出口(14)を開設し、これら導入口(12)および排出口(14)に連通する収容部(16)を内部に画成したケース体(10)と、適度の弾力性を有する均一密度の多孔質体を材質とし、前記収容部(16)に着脱自在に収容される濾材(20)とからなり、前記導入口(12)から収容部(16)へ導入した流体を前記濾材(20)に通過させて該流体に混在している微細な異物を捕集し、清浄化された流体を前記排出口(14)から排出するようにした流体フィルタにおいて、
前記収容部(16)に収容される前の前記濾材(20)の外部寸法を、該収容部(16)の内部容積より適宜大きく設定し、
前記収容部(16)へ前記濾材(20)を圧縮的に収容することで、前記異物の捕集率が高まる圧縮部位(30)を当該濾材(20)の任意の部位に作り出し、これにより各種寸法差のある前記異物を前記濾材(20)の全体に亘り捕集し得るよう構成した
ことを特徴とする流体フィルタ。
A case body (10) in which a fluid inlet (12) and a fluid outlet (14) are opened at required positions and a housing (16) communicating with the fluid inlet (12) and the fluid outlet (14) is defined inside. ), And a filter medium (20) made of a porous material having an appropriate elasticity and a uniform density and removably housed in the housing section (16). The fluid introduced into 16) is passed through the filter medium (20) to collect fine foreign substances mixed in the fluid, and the purified fluid is discharged from the outlet (14). In the filter,
The external dimensions of the filter medium (20) before being stored in the storage section (16) are appropriately set larger than the internal volume of the storage section (16),
By compressively storing the filter medium (20) in the storage section (16), a compressed portion (30) where the collection rate of the foreign matter is increased is created at an arbitrary portion of the filter medium (20). A fluid filter, wherein the foreign matter having a dimensional difference is configured to be collected over the entirety of the filter medium (20).
前記濾材(20)と前記収容部(16)との寸法差は、前記導入口(12)の側より前記排出口(14)の側がより大きく設定され、これにより前記圧縮部位(30)の圧縮度合は、該導入口(12)の側より該排出口(14)の側の方が大きくなっている請求項1記載の流体フィルタ。The dimensional difference between the filter medium (20) and the storage part (16) is set to be larger on the discharge port (14) side than on the inlet port (12) side, thereby compressing the compression part (30). 2. The fluid filter according to claim 1, wherein a degree of the outlet (14) is greater than a degree of the inlet (12). 前記濾材(20)と前記収容部(16)との寸法差は、前記導入口(12)の側から前記排出口(14)の側に向けて段階的に大きくなるよう設定されている請求項2記載の流体フィルタ。The dimensional difference between the filter medium (20) and the storage section (16) is set so as to increase stepwise from the side of the inlet (12) toward the side of the outlet (14). 3. The fluid filter according to 2. 前記濾材(20)と前記収容部(16)との寸法差は、前記導入口(12)の側から前記排出口(14)の側に向けて連続的に大きくなるよう設定されている請求項2記載の流体フィルタ。The dimensional difference between the filter medium (20) and the storage section (16) is set to increase continuously from the inlet (12) side to the discharge port (14) side. 3. The fluid filter according to 2. 前記濾材(20)と前記収容部(16)との寸法差は、前記導入口(12)の側から前記排出口(14)の側に向けて直線的に大きくなるよう設定されている請求項4記載の流体フィルタ。The dimensional difference between the filter medium (20) and the storage section (16) is set to increase linearly from the inlet (12) side to the discharge port (14) side. 5. The fluid filter according to 4. 前記濾材(20)と前記収容部(16)との寸法差は、前記導入口(12)の側から前記排出口(14)の側に向けて非直線的に大きくなるよう設定されている請求項4記載の流体フィルタ。The dimensional difference between the filter medium (20) and the storage section (16) is set to increase nonlinearly from the inlet (12) side to the discharge port (14) side. Item 6. A fluid filter according to item 4. 前記濾材(20)は、連泡構造を有する合成樹脂製の連泡体、不織布または繊維集合体等から形成される請求項1〜6の何れかに記載の流体フィルタ。The fluid filter according to any one of claims 1 to 6, wherein the filter medium (20) is formed of an open cell, a nonwoven fabric, a fiber aggregate, or the like made of a synthetic resin having an open cell structure.
JP2002218889A 2002-01-25 2002-07-26 Fluid filter Pending JP2004057914A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2002218889A JP2004057914A (en) 2002-07-26 2002-07-26 Fluid filter
US10/349,862 US6926828B2 (en) 2002-01-25 2003-01-23 Fluid filter
AT03001559T ATE297797T1 (en) 2002-01-25 2003-01-23 FLUID FILTER
DE60300826T DE60300826T2 (en) 2002-01-25 2003-01-23 fluid filter
EP03001559A EP1334757B1 (en) 2002-01-25 2003-01-23 Fluid filter

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008000670A (en) * 2006-06-21 2008-01-10 Toyota Boshoku Corp Oil filter
JP2008229615A (en) * 2007-02-05 2008-10-02 Visteon Global Technologies Inc Multilayered long life filter using convoluted foam
JP2009531495A (en) * 2006-03-28 2009-09-03 ビーエーエスエフ ソシエタス・ヨーロピア Tube filled with melamine / formaldehyde resin open cell foam and method of using the tube as a filter or static mixer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009531495A (en) * 2006-03-28 2009-09-03 ビーエーエスエフ ソシエタス・ヨーロピア Tube filled with melamine / formaldehyde resin open cell foam and method of using the tube as a filter or static mixer
JP2008000670A (en) * 2006-06-21 2008-01-10 Toyota Boshoku Corp Oil filter
JP2008229615A (en) * 2007-02-05 2008-10-02 Visteon Global Technologies Inc Multilayered long life filter using convoluted foam

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