JP4529386B2

JP4529386B2 - Electric dust collection unit

Info

Publication number: JP4529386B2
Application number: JP2003190950A
Authority: JP
Inventors: 徹甲斐; 弘岩橋
Original assignee: Panasonic Corp; Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Corp; Panasonic Holdings Corp
Priority date: 2003-07-03
Filing date: 2003-07-03
Publication date: 2010-08-25
Anticipated expiration: 2023-07-03
Also published as: JP2005021817A

Description

【０００１】
【発明の属する技術分野】
本発明は、空気調和機の空気流路に設けられる電気集塵ユニットに関するものである。
【０００２】
【従来の技術】
従来、この種の電気集塵ユニットとして、フィルタ枠を合成樹脂で形成したものが知られている（例えば特許文献１参照）。
【０００３】
以下その電気集塵ユニットについて、図１６〜図１８を参照しながら説明する。
【０００４】
図に示すように、樹脂製のフィルタ枠１０１の吸水口１０２側に針状の放電電極１０３を設け、放電電極１０３に対向し通気可能なアース電極１０４を設け、アース電極１０４の風下側に設けられるフィルタ１０５によりフィルタ装置１０６を形成し、フィルタ装置１０６を装着することにより放電電極１０３にマイナスの高電圧を高電圧印加部１０７が印加し、アース電極１０４にアースが接続されるようにして空気調和機等に設けられた空気流路に高電圧印加装置１０８を配設していた。
【０００５】
【特許文献１】
特開２００３−１０７３１号公報（［００１４］、図１、図３、図１１）
【０００６】
【発明が解決しようとする課題】
しかしながら、上記従来の構成では、フィルター枠１０１は通常の合成樹脂で形成されているので、帯電した静電気によりフィルター枠１０１に粉塵が付着しやすくなり汚染されているという課題があった。
【０００７】
本発明は、上記従来の課題を解決するもので、吸気グリルに帯電する静電気を逃して吸気グリルへの粉塵の付着を防止できる電気集塵ユニットを提供することを目的としている。
【０００８】
【課題を解決するための手段】
上記従来の課題を解決するために、空気調和機等の空気流路に設けられる横長の保持ユニットと、この保持ユニットの一端部に設けられる高圧印加装置と、前記保持ユニットに着脱自在に設けられる、フィルタユニットとを有し、このフィルタユニットは前記高圧印加装置と電気的に接続される放電針を備えた中央が前方に膨出した形状の吸気グリルと、前記放電針の風下側に設けられる通風可能なアース電極と集塵フィルタとを設け、前記吸気グリルは、風上側に格子状の導電性樹脂からなる導電リブを、その風下側に格子状の非導電性樹脂からなる非導電リブとを配設して形成し、前記導電リブをアース電極に接続し、前記放電針の先端を風上側からみて導電リブで囲むようにしたものである。
【０００９】
また、放電針先端とアース電極までの最短距離と、前記放電針先端と吸気グリルの導電リブまでの最短距離を略同一としたものである。
【００１０】
また、吸気グリルの導電リブの先端に爪部を形成し、非導電性樹脂に形成された吸気グリルに凹形状の係合部を設け、前記爪部を係合部に係合して導電リブを取り付ける構成としたものである。
【００１１】
また、前記アース電極は、外周に金属製の枠部を有し、この枠部に備えた前記吸気グリル側に突出した取付部と、前記吸気グリルの導電リブに設けた突部とで連結手段を構成し、この連結手段は、前記吸気グリルの非導電リブを挟んで連結する構成としたものである。
【００１２】
また、放電針の風下側に設けられるアース電極上の前記放電針との最短位置に平板状の補助電極板を設けたものである。
【００１３】
また、アース電極の枠部内に収納される集塵フィルタと前記枠部の外側辺に形成される切断ばりと、前記アース電極の枠部との隙間を介して包囲するフィルタユニット枠とを備え、前記アース電極を基準面としたフィルタユニット枠の枠壁高さを、前記アース電極の枠部の高さより大とするとともに、前記集塵フィルタの厚み寸法を前記アース電極の枠部の枠壁高さより大としたものである。
【００１４】
また、アース電極に収納される非変形性の集塵フィルタと、この集塵フィルタの開口側を押さえる格子状のフィルタ枠とを設けたフィルタユニットを備え、前記フィルタ枠の格子に集塵フィルタ側に向かい突設する微小突起を設けたものである。
【００１５】
また、吸気グリルの前面に横長形状に形成された収納溝と、この収納溝に収納される形状で複数の放電針を連結した針状電極ユニットと、この針状電極ユニットの高圧受給端子となるＬ字状でフィルタユニット端部のスライド突起に嵌合する折曲片と、前記収納溝に嵌入する針状電極ユニットを覆う形状の針状電極カバーとを備え、前記針状電極カバーに押えリブを設け、前記針状電極ユニットに設けた凹部に当接して固定する構成としたものである。
【００１６】
【発明の実施の形態】
請求項１に記載の発明は、空気調和機等の空気流路に設けられる横長の保持ユニットと、この保持ユニットの一端部に設けられる高圧印加装置と、前記保持ユニットに着脱自在に設けられるフィルタユニットとを有し、このフィルタユニットは前記高圧印加装置と電気的に接続される放電針を備えた中央が前方に膨出した形状の吸気グリルと、前記放電針の風下側に設けられる通風可能なアース電極と集塵フィルタとを設け、前記吸気グリルは、風上側に格子状の導電性樹脂からなる導電リブを、その風下側に格子状の非導電性樹脂からなる非導電リブとを配設して形成し、前記導電リブをアース電極に接続し、前記放電針の先端を風上側からみて導電リブで囲むようにしたことにより、吸気グリルに帯電する静電気を逃がすことが可能となり、吸気グリルへの粉塵の付着を防止して、汚れにくく洗浄しやすくするとともに、人体への感電を防止することができる。
【００１７】
また、放電針の先端とアース電極までの最短距離と、前記放電針の先端と吸気グリルの導電リブまでの最短距離を略同一としたことにより、放電針からのアース電極および導電リブへの放電量のバランスを保つことができ、集塵効率を安定化させるとともに、放電アンバランスで生じていたアース側部材の偏在汚れや、汚れによる劣化を防止することができる。
【００１８】
また、吸気グリルの導電リブの先端に爪部を形成し、非導電性樹脂により形成された吸気グリルに凹形状の係合部を設け、前記爪部を係合部に係合して導電リブを取り付けることにより、放電針と導電リブ先端とのアーク放電を防いで安全性を保ち、導電リブの位置決めを確実にし、組立作業を簡単に行うことができる。
【００１９】
また、前記アース電極は、外周に金属製の枠部を有し、この枠部に備えた前記吸気グリル側に突出した取付部と、前記吸気グリルの導電リブに設けた突部とで連結手段を構成し、この連結手段は、前記吸気グリルの非導電リブを挟んで連結することにより、アース電極と接続して導電リブのアース接続を行なうのにねじなどの結合部品を使用することなく組立作業が容易となり、非導電リブを挟みこむサンドイッチ構造として、組立後は、枠構造のアース電極と吸気グリルを一体化して剛性のあるフィルタユニットを構成することができ、保持ユニットへの着脱に耐える強度が得られ、運転時の共振に起因する振動音の発生を防止できる。
【００２０】
また、放電針の風下側に設けられるアース電極上の前記放電針との最短位置に平板状の補助電極板を設けたことにより、アース電極を形成するラス網部のエッジに局所的にコロナ放電してラス網に局所的にごみが付着して劣化する現象を防ぐとともに、コロナ放電のアース電極への範囲を広げて集塵効率を向上することができる。
【００２１】
また、アース電極の枠部内に収納される集塵フィルタと、前記枠部の外側辺に形成される切断ばりと、前記アース電極の枠部との隙間を介して包囲するフィルタユニット枠とを備え、前記アース電極を基準面としたフィルタユニット枠の枠壁高さを、前記アース電極の枠部の高さより大とするとともに、前記集塵フィルタの厚み寸法を前記アース電極の枠部の枠壁高さより大としたことにより、フィルタユニット枠の枠壁高さおよび集塵フィルタの厚み寸法の高さがアース電極の枠部の外側辺に形成される金属部の切断時に発生する切断ばりより高くなることとなり、切断ばりを、ばり取り加工により取り除かなくても良くなり、加工工数が削減されコストダウンを図ることができる。
【００２２】
また、アース電極に収納される非変形性の集塵フィルタと、この集塵フィルタの開口側を押える格子状のフィルタ枠とを設けたフィルタユニットを備え、前記フィルタ枠の格子に集塵フィルタ側に向かい突設する微小突起を設けたことにより、集塵フィルタとフィルタ枠との間に微小空間が形成され、集塵フィルタ全体に通風できるようになって集塵性能を向上することができる。
【００２３】
また、吸気グリルの前面に横長形状に形成された収納溝と、この収納溝に収納される形状で複数の放電針を連結した針状電極ユニットと、この針状電極ユニットの高圧受給端子となるＬ字状でフィルタユニット端部のスライド突起に嵌合する折曲片と、前記収納溝に嵌入する針状電極ユニットを覆う形状の針状電極カバーとを備え、前記針状電極カバーに押さえリブを設け、前記針状電極ユニットに設けた凹部に当接して固定する構成としたことにより、フィルタユニットの所定位置にねじなどを使用せずに簡単な取付作業で放電針を精度良く固定することができ、取付作業のばらつきに起因する集塵性能の低下を防止することができる。
【００２４】
以下、本発明の実施例について、図面を参照しながら説明する。
【００２５】
【実施例】
（実施例１）
図１〜図１５に示すように、空気調和機（図示せず）等の空気流路に設けられる横長の保持ユニット１の一端部に高圧印加装置２を設け、保持ユニット１にはフィルタユニット７を着脱可能に設けている。フィルタユニット７は高圧印加装置２に電気的に接続される放電針３を有し、中央が前方に膨出する形状の吸気グリル４と放電針３の風下側に設けられるアース電極５と集塵フィルタ６とを設けている。
【００２６】
吸気グリル４を非導電性樹脂からなる非導電リブ８と、導電性樹脂からなる導電リブ９を格子状に配設し、放電針３の先端を投影面で見て導電リブ９で囲むように形成し、吸気グリル４には取手１０を設ける。
【００２７】
また、導電リブ９は先端に爪部１１を形成し、非導電性樹脂により形成された吸気グリル４に凹状の係合部１２を設け、爪部１１を係合部１２に係合して導電リブ９が取り付けられる。
【００２８】
外周に金属製の枠部１３を有し、内部に通風性を有するラス網５ａを設け形成したアース電極５の枠部１３に入口が狭く奥部に円形孔を設けた杓子状の切欠孔１４ａを設けた取付部１４ｂを複数箇所に設け、導電リブ９に杓子状の突部９ａを設け、アース電極５の取付部１４ｂに設けた切欠孔１４ａに嵌合して導電リブ９とアース電極５を連結する連結手段１４を形成し、連結手段１４により吸気グリル４の非導電性リブ８を挟持するように設け、導電リブ９をアース電極５に接続する。
【００２９】
また、図１に示す放電針３の先端とアース電極５までの最短距離（ａ）と図８に示す放電針３の先端と吸気グリル４の導電リブ９までの最短距離（ｂ）を略同一とし、アース電極５からの最短位置に円形で平板状の補助電極板１５を設ける。
【００３０】
また、アース電極５の枠部１３に収納される集塵フィルタ６と、枠部１３の外側辺に形成される切断時に発生する切断ばり１６と、アース電極５の枠部１３との隙間１７を介して包囲するフィルタユニット７とを備え、アース電極５を基準面としたフィルタユニット枠１８の枠壁高さを、アース電極５の切断ばり１６が形成された枠部１３の高さより大とするとともに、集塵フィルタ６の厚み寸法をアース電極５の枠部１３の枠壁高さより大として形成する。
【００３１】
また、アース電極５に収納される非変形性の集塵フィルタ６の開口側を押さえる格子状のフィルタ枠１９を吸気グリル４に開閉自在に設け、フィルタ枠１９の格子１９ａ部分に集塵フィルタ６側に向かい突設する微小突起２０を設ける。
【００３２】
また、吸気グリル４の前面に、横長形状に形成された収納溝２１を設け、収納溝２１に収納される形状で複数の放電針３を連結した針状電極ユニット２２を設け、針状電極ユニット２２の高圧受給端子となるＬ字状でフィルタユニット７端部のスライド突起２３に嵌合する折曲片２４と、収納溝２１に嵌入する針状電極ユニット２２を覆う形状の針状電極カバー２５とを設け、針状電極カバー２５に押さえリブ２６を設け針状電極ユニット２２に設けた凹部２７に当接して針状電極ユニット２２を固定する構成とする。
【００３３】
上記構成において、空気調和機等の空気流路に保持ユニットを介して取り付けられたフィルタユニット７に空気が流れると吸気グリル４に設けた放電針３に高圧印加装置１２から印加されているマイナスの高電圧とアース電極５により放電針３の附近に大きな電界が形成され、空気分子中の電子が分離したり、また分離した電子が別の空気分子に結合するなどして空気分子がイオン化され空気イオンとなり、空気イオンが電界の力によって拡散し粉塵に付着して粉塵を帯電させ、帯電した粉塵粒子は粒子同志の緩衝を防ぎ、アース電極５の風下側に設けた集塵フィルタ６に吸着されて集塵される。
【００３４】
このように本発明の実施例１の電気集塵ユニットによれば、空気調和機等の空気流路に設けられる横長の保持ユニット１の一端部に高圧印加装置２を設け、また、保持ユニット１にフィルタユニット７を着脱自在に設け、このフィルタユニット７は高圧印加装置２と電気的に接続される放電針３を有し、中央が前方に膨出した形状の吸気グリル４と、放電針３の風下側に設けられる通風可能なアース電極５と集塵フィルタ６とを設け、保持ユニット１に着脱自在に設けられるフィルタユニット７を設け、吸気グリル４を非導電性樹脂からなる非導電リブ８と、導電性からなる導電リブ９を格子状に配設して形成し、導電リブ９をアース電極５に接続することにより、吸気グリル４に帯電する静電気を逃がすことが可能となり、吸気グリル４への粉塵の付着を防止して、汚れにくく洗浄しやすくなるとともに、人体への感電を防止することができる。
【００３５】
また、放電針３の先端を投影面で見て導電リブ９で囲むように吸気グリル４を形成したことにより、放電針３からのコロナ放電をアース電極５以外の吸気グリル４の導電リブ９においても行なわせ、マイナスイオンの放電領域を立体的に広げて粉塵へのマイナスイオン化を促進して集塵効率を向上させることができるとともに、吸気グリル４の局所的な汚れを防止することができる。
【００３６】
また、放電針３の先端とアース電極５までの最短距離（ａ）と、放電針３の先端と吸気グリル４の導電リブ９までの最短距離（ｂ）を略同一としたことにより、放電針３からのアース電極５および導電リブ９への放電量のバランスを保つことができ、集塵効率を安定化させるとともに、放電アンバランスで生じていたアース側部材の偏在汚れや、汚れによる劣化を防止することができる。
【００３７】
また、吸気グリル４の導電リブ９の先端に爪部１１を形成し、非導電性樹脂により形成された吸気グリル４に凹形状の係合部１２を設け、爪部１１を係合部１２に係合して導電リブ９を取り付けることにより、放電針３と導電リブ９先端とのアース放電を防いで安全性が保たれ、導電リブ９の位置決めを確実にし、組立作業を簡単に行うことができる。
【００３８】
また、外周に金属製の枠部１３を有するアース電極５と、アース電極５の枠部１３と吸気グリル４の導電リブ９とを複数箇所で連結する連結手段１４とを設け、連結手段１４により吸気グリル４の非導電リブ８を挟持することにより、アース電極５と接続して導電リブ９のアース接続を行なうのにねじなどの結合部品を使用することはなく組立作業が容易となり、非導電リブ８を挟み込むサンドイッチ構造として、組立後は、枠構造のアース電極５と吸気グリル４を一体化して剛性のあるフィルタユニット７を構成することができ、保持ユニット１への着脱に耐えるだけの強度が得られ、運転時に共振による騒音の発生するのを防止するこ
とができる。
【００３９】
また、放電針３の風下側に設けられるアース電極５上の放電針３との最短位置に平板状の補助電極１５を設けたことにより、アース電極５を形成するラス網５ａ部のエッジに局所的にコロナ放電をしてラス網５ａに局所的にごみが付着して劣化する現象を防ぐとともにコロナ放電のアース電極５への範囲を広げて集塵効率を向上することができる。
【００４０】
また、アース電極５の枠部１３内に収納される集塵フィルタ６と、枠部１３の外側辺に形成された切断ばり１６と、アース電極５の枠部１３との隙間１７を介して包囲するフィルタユニット枠１８とを設け、アース電極５を基準面としたフィルタユニット枠１８の枠壁高さを、アース電極５の枠部１３の高さより大とするとともに、集塵フィルタ６の厚み寸法をアース電極５の枠部１３の枠壁高さより大としたことにより、フィルタユニット枠１８の枠壁高さおよび、集塵フィルタ６の厚み寸法の高さが、アース電極５の枠部１３の外側辺に形成される金属部の切断時に発生する切断ばり１６より高くなることとなり、切断ばり１６をばり取り加工により取り除かなくても切断ばり１６が邪魔になることがなくなり、加工工数が削減されコストダウンを図ることができる。
【００４１】
また、アース電極５に収納される非変形性の集塵フィルタ６と、集塵フィルタ６の開口側を押さえる格子状のフィルタ枠１９を設けたフィルタユニット７を備え、フィルタ枠１９の格子１９ａに集塵フィルタ６側に向かい突設する微小突起２０を設けたことにより、集塵フィルタ６とフィルタ枠１９との間に微小空間が形成され、集塵フィルタ６全体に通風できるようになって集塵性能を向上することができる。
【００４２】
また、吸気グリル４の前面に横長形状に形成された収納溝２１と、収納溝２１に収納される形状で複数の放電針３を連結した針状電極ユニット２２と、針状電極ユニット２２の高圧受給端子となるＬ字状でフィルタユニット７端部のスライド突起２３に嵌合する折曲片２４と、収納溝２１に嵌入する針状電極ユニット２２を覆う形状の針状電極カバー２５とを備え、針状電極カバー２５に押さえリブ２６を設け、針状電極ユニット２２に設けた凹部２７に当接して固定する構成としたことにより、フィルタユニット７の所定位置にねじなどを使用せずに簡単な取付作業で放電針３を精度良く固定することができ、取付作業のばらつきに起因する集塵性能の低下を防止することができる。
【００４３】
【発明の効果】
以上の実施例から明らかなように、本発明によれば空気調和機等の空気流路に設けられる横長の保持ユニットと、この保持ユニットの一端部に設けられる高圧印加装置と、前記保持ユニットに着脱自在に設けられるフィルタユニットとを有し、前記高圧印加装置と電気的に接続される放電針を備えた中央が前方に膨出した形状の吸気グリルと、前記放電針の風下側に設けられる通風可能なアース電極と集塵フィルタとを設け、前記保持ユニットに着脱自在に設けられるフィルタユニットとを備え、前記吸気グリルを非導電性樹脂からなる非導電リブと、導電性からなる導電リブを格子状に配設して形成史し、前記導電リブをアース電極に接続する構成としたので、吸気グリルへの粉塵の付着を防止し、汚れにくく、洗浄しやすくするとともに、人体への感電を防止できる電気集塵ユニットを提供できる。
【００４４】
また、放電針の先端を投影面で見て導電リブで囲むように吸気グリルを形成したので、集塵効率を向上させるとともに、吸気グリルへの局所的な汚れを防止することができる。
【００４５】
また、放電針の先端とアース電極までの最短距離と、前記放電針の先端と吸気グリルの導電リブまでの最短距離を略同一としたので、集塵効率を安定化することができるとともに、アース側部材の偏在汚れや汚れによる劣化を防止することができる。
【００４６】
また、吸気グリルの導電リブの先端に爪部を形成し、非導電性樹脂により形成された吸気グリルに凹形状の係合部を設け、前記爪部を係合部に係合して導電リブを取り付ける構成としたので、アーク放電を防いで安全性を保ち導電リブの位置決めを確実にし、組立作業を簡易に行うことができる。
【００４７】
また、外周に金属製の枠部を有するアース電極と、このアース電極の枠部と吸気グリルの導電リブとを複数箇所で連結する連結手段とを備え、前記連結手段により吸気グリルの非導電リブを挟持する構成としたので、組立作業が容易で、剛性のあるフィルタユニットを構成することができ、共振による振動騒音の発生を防止することができる。
【００４８】
また、放電針の風下側に設けられるアース電極上の前記放電針との最短位置に平板状の補助電極板を設けたので、ラス網に局所的にごみが付着して劣化する現象が防止できるとともに、集塵効率を向上することができる。
【００４９】
また、アース電極の枠部内に収納される集塵フィルタと、前記枠部の外側辺に形成される切断ばりと、前記アース電極の枠部との隙間を介して包囲するフィルタユニット枠とを備え、前記アース電極を基準面としたフィルタユニット枠の枠壁高さを、前記アース電極の枠部の高さより大とするとともに、前記集塵フィルタの厚み寸法を前記アース電極の枠部の枠壁高さより大としたので、切断ばりをばり取り加工により取り除かなくても、切断ばりが邪魔にならず安全を保ち、加工工数が削減されコストダウンを図ることができる。
【００５０】
また、アース電極に収納される非変形性の集塵フィルタと、この集塵フィルタの開口側を押さえる格子状のフィルタ枠とを設けたフィルタユニットを備え、前記フィルタ枠の格子に集塵フィルタ側に向かい突設する微小突起を設けたので、集塵フィルタ全体に通風ができ、集塵性能の向上を図ることができる。
【００５１】
また、吸気グリルの前面に横長形状に形成された収納溝と、この収納溝に収納される形状で複数の放電針を連結した針状電極ユニットと、この針状電極ユニットの高圧受給端子となるＬ字状でフィルタユニット端部のスライド突起に嵌合する折曲片と、前記収納溝に嵌入する針状電極ユニットを覆う形状の針状電極カバーとを備え、前記針状電極カバーに押さえリブを設け、前記針状電極ユニットに設けた凹部に当接して固定する構成としたので、フィルタユニットの所定位置にねじなどを使用せずに放電針を精度良く固定することができ、取付作業のバラツキに起因する集塵性能の不良を防止することができる。
【図面の簡単な説明】
【図１】本発明の実施例１の電気集塵ユニットのフィルタユニットを示す断面図
【図２】同電気集塵ユニットの保持ユニットの正面図
【図３】同電気集塵ユニットのフィルタユニットの正面図
【図４】同電気集塵ユニットの導電リブを係止する係合部を示す外観斜視図
【図５】同電気集塵ユニットの導電リブの係合状態を示す要部透視の斜視図
【図６】同電気集塵ユニットのアース電極の斜視図
【図７】同電気集塵ユニットのアース電極と導電リブの結合状態を示す斜視図
【図８】同電気集塵ユニットの放電針と導電リブとの関係を示す要部正面図
【図９】同電気集塵ユニットの補助電極板を示す要部正面図
【図１０】同電気集塵ユニットのフィルタユニット枠とアース電極の関係を示す断面図
【図１１】同電気集塵ユニットのフィルタ枠を示す正面図
【図１２】同電気集塵ユニットの吸気グリルとフィルタ枠の関係を示す側面図
【図１３】同電気集塵ユニットの集塵フィルタの取付時の状態を示す分解斜視図
【図１４】同電気集塵ユニットの吸気グリルと針状ユニットおよび針状電極カバーとの関係を示す分解斜視図
【図１５】同電気集塵ユニットの吸気グリルと針状ユニットおよび針状電極カバーとの関係を示す拡大図
【図１６】従来の電気集塵ユニットのフィルタ装置の構成を示す断面図
【図１７】同電気集塵ユニットのフィルタ枠の背面図
【図１８】同電気集塵ユニットのフィルタ装置の正面図
【符号の説明】
１保持ユニット
２高圧印加装置
３放電針
４吸気グリル
５アース電極
６集塵フィルタ
７フィルタユニット
８非導電リブ
９導電リブ
１１爪部
１２係合部
１３枠部
１４連結手段
１５補助電極板
１６切断ばり
１７隙間
１８フィルタユニット枠
１９フィルタ枠
１９ａ格子
２０微小突起
２１収納溝
２２針状電極ニット
２３スライド突起
２４折曲片
２５針状電極カバー
２６押えリブ
２７凹部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electric dust collection unit provided in an air flow path of an air conditioner.
[0002]
[Prior art]
Conventionally, as this type of electrostatic dust collection unit, a filter frame formed of a synthetic resin is known (see, for example, Patent Document 1).
[0003]
Hereinafter, the electric dust collection unit will be described with reference to FIGS.
[0004]
As shown in the figure, a needle-shaped discharge electrode 103 is provided on the water suction port 102 side of the resin filter frame 101, a ground electrode 104 that can be ventilated facing the discharge electrode 103 is provided, and provided on the leeward side of the ground electrode 104. The filter device 106 is formed by the filter 105, and the filter device 106 is attached so that the high voltage applying unit 107 applies a negative high voltage to the discharge electrode 103, and the ground electrode 104 is connected to the ground so that the air is connected. The high voltage applying device 108 is disposed in an air flow path provided in a conditioner or the like.
[0005]
[Patent Document 1]
JP 2003-10731 A ([0014], FIG. 1, FIG. 3, FIG. 11)
[0006]
[Problems to be solved by the invention]
However, in the above-described conventional configuration, since the filter frame 101 is formed of a normal synthetic resin, there is a problem that dust is easily attached to the filter frame 101 due to charged static electricity and is contaminated.
[0007]
SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object of the present invention is to provide an electric dust collection unit capable of preventing static electricity charged on the intake grill and preventing dust from adhering to the intake grill.
[0008]
[Means for Solving the Problems]
In order to solve the above-described conventional problems, a horizontally long holding unit provided in an air flow path of an air conditioner or the like, a high-pressure applying device provided at one end of the holding unit, and a detachably provided in the holding unit A filter unit, and the filter unit is provided on the leeward side of the discharge needle, with an intake grille having a center bulging forward and a discharge needle electrically connected to the high-voltage applying device. A ventilation ground electrode and a dust collecting filter are provided, and the intake grille includes a conductive rib made of a lattice-like conductive resin on the leeward side and a non-conductive rib made of a lattice-like nonconductive resin on the leeward side. The conductive rib is connected to a ground electrode, and the tip of the discharge needle is surrounded by the conductive rib when viewed from the windward side .
[0009]
The shortest distance between the discharge needle tip and the ground electrode and the shortest distance between the discharge needle tip and the conductive rib of the intake grill are substantially the same.
[0010]
Also, a claw portion is formed at the tip of the conductive rib of the intake grille, a concave engagement portion is provided on the intake grill formed of non-conductive resin, and the claw portion is engaged with the engagement portion so that the conductive rib is engaged. It is set as the structure which attaches.
[0011]
Further, the earth electrode may have a metal frame portion to the outer periphery, connected by a mounting portion projecting into the intake grille side with the frame portion of this, the projection provided on the conductive rib of the intake grill The connecting means is configured to be connected with a non-conductive rib of the intake grill interposed therebetween .
[0012]
Further, a flat auxiliary electrode plate is provided at the shortest position with the discharge needle on the ground electrode provided on the leeward side of the discharge needle.
[0013]
A dust collecting filter housed in the frame portion of the ground electrode; a cutting beam formed on the outer side of the frame portion; and a filter unit frame that surrounds the gap between the frame portion of the ground electrode, The height of the frame wall of the filter unit frame with respect to the ground electrode is made larger than the height of the frame portion of the ground electrode, and the thickness dimension of the dust collecting filter is set to the height of the frame wall of the frame portion of the ground electrode. Greater than that.
[0014]
And a filter unit provided with a non-deformable dust collecting filter housed in the ground electrode and a grid-like filter frame that holds the opening side of the dust collecting filter, and the dust collecting filter side of the filter frame grid Are provided with minute protrusions protruding toward the surface.
[0015]
Also, a storage groove formed in a horizontally long shape on the front surface of the intake grille, a needle electrode unit in which a plurality of discharge needles are connected in a shape stored in the storage groove, and a high voltage receiving terminal of the needle electrode unit An L-shaped bent piece that fits into the slide protrusion at the end of the filter unit; and a needle-like electrode cover that covers the needle-like electrode unit that fits into the storage groove; and a presser rib on the needle-like electrode cover And is configured to contact and be fixed to a recess provided in the needle electrode unit.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 is a horizontally long holding unit provided in an air flow path of an air conditioner or the like, a high voltage applying device provided at one end of the holding unit, and a filter provided detachably on the holding unit. The filter unit includes a discharge needle electrically connected to the high-voltage applying device, and an intake grille having a shape in which the center bulges forward, and ventilation is provided on the leeward side of the discharge needle. A grounding electrode and a dust collecting filter are provided, and the intake grille has a conductive rib made of a lattice-like conductive resin on the leeward side and a non-conductive rib made of a lattice-like nonconductive resin on the leeward side. formed by setting, to connect the conductive rib to the ground electrode by the tip of the discharge needle to surround windward side viewed from conductive ribs, it is possible to release the static electricity charged to the inlet grille , To prevent adhesion of dust to the intake grille, as well as easy to wash difficult stains, it is possible to prevent electric shock to the human body.
[0017]
In addition, since the shortest distance from the tip of the discharge needle to the ground electrode and the shortest distance from the tip of the discharge needle to the conductive rib of the intake grill are substantially the same, the discharge from the discharge needle to the ground electrode and conductive rib The balance of the amount can be maintained, the dust collection efficiency can be stabilized, and the uneven distribution of the earth side member caused by the discharge imbalance and the deterioration due to the contamination can be prevented.
[0018]
Also, a claw portion is formed at the front end of the conductive rib of the intake grille, a concave engagement portion is provided on the intake grill formed of non-conductive resin, and the claw portion is engaged with the engagement portion to connect the conductive rib. By attaching the, it is possible to prevent arc discharge between the discharge needle and the tip of the conductive rib to maintain safety, to ensure the positioning of the conductive rib, and to easily perform the assembly work.
[0019]
Further, the earth electrode may have a metal frame portion to the outer periphery, connected by a mounting portion projecting into the intake grille side with the frame portion of this, the projection provided on the conductive rib of the intake grill The connecting means is connected with the non-conductive rib of the intake grille sandwiched therebetween, so that a connecting part such as a screw is not used to connect to the ground electrode and connect the ground of the conductive rib. As a sandwich structure that facilitates assembly work and sandwiches non-conductive ribs, after assembly, the ground electrode of the frame structure and the intake grill can be integrated to form a rigid filter unit, which can be attached to and detached from the holding unit. Strength to withstand can be obtained, and generation of vibration noise due to resonance during operation can be prevented.
[0020]
Further, by providing a flat auxiliary electrode plate at the shortest position with the discharge needle on the ground electrode provided on the leeward side of the discharge needle, a corona discharge is locally generated at the edge of the lath mesh portion forming the ground electrode. Thus, it is possible to prevent the phenomenon that dust is locally attached to the lath net and deteriorate, and the dust collection efficiency can be improved by expanding the range of the corona discharge to the ground electrode.
[0021]
A dust collecting filter housed in the frame portion of the ground electrode; a cutting beam formed on an outer side of the frame portion; and a filter unit frame surrounded by a gap between the frame portion of the ground electrode. The height of the frame wall of the filter unit frame with respect to the ground electrode as a reference plane is made larger than the height of the frame portion of the ground electrode, and the thickness dimension of the dust collecting filter is set to the frame wall of the frame portion of the ground electrode. By making it larger than the height, the frame wall height of the filter unit frame and the thickness of the dust collection filter are higher than the cutting beam generated when cutting the metal part formed on the outer side of the frame part of the ground electrode. As a result, the cutting beam need not be removed by deburring, and the number of processing steps can be reduced and the cost can be reduced.
[0022]
A filter unit provided with a non-deformable dust collection filter housed in the ground electrode and a grid-like filter frame that holds the opening side of the dust collection filter; By providing the minute projections projecting toward, a minute space is formed between the dust collection filter and the filter frame, and the entire dust collection filter can be ventilated to improve the dust collection performance.
[0023]
Also, a storage groove formed in a horizontally long shape on the front surface of the intake grille, a needle electrode unit in which a plurality of discharge needles are connected in a shape stored in the storage groove, and a high voltage receiving terminal of the needle electrode unit An L-shaped bent piece that fits into the slide protrusion at the end of the filter unit; and a needle-like electrode cover that covers the needle-like electrode unit that fits into the storage groove; The discharge needle can be fixed with high accuracy by a simple mounting operation without using screws or the like at a predetermined position of the filter unit. It is possible to prevent the dust collection performance from being lowered due to variations in the mounting work.
[0024]
Embodiments of the present invention will be described below with reference to the drawings.
[0025]
【Example】
Example 1
As shown in FIGS. 1 to 15, a high-pressure applying device 2 is provided at one end of a horizontally long holding unit 1 provided in an air flow path of an air conditioner (not shown) or the like, and the holding unit 1 has a filter unit 7. Is detachably provided. The filter unit 7 includes a discharge needle 3 that is electrically connected to the high-voltage applying device 2, an intake grill 4 having a shape in which the center bulges forward, a ground electrode 5 provided on the leeward side of the discharge needle 3, and dust collection. A filter 6 is provided.
[0026]
A non-conductive rib 8 made of a non-conductive resin and a conductive rib 9 made of a conductive resin are arranged in a lattice pattern on the intake grill 4 so that the tip of the discharge needle 3 is surrounded by the conductive rib 9 when viewed from the projection surface. The intake grill 4 is formed with a handle 10.
[0027]
In addition, the conductive rib 9 has a claw portion 11 formed at the tip, and a concave engagement portion 12 is provided on the intake grill 4 formed of a non-conductive resin, and the claw portion 11 is engaged with the engagement portion 12 to conduct electricity. Ribs 9 are attached.
[0028]
An insulator-like cutout hole 14a having a narrow entrance and a circular hole in the back of the frame 13 of the ground electrode 5 having a metal frame 13 on the outer periphery and a lath net 5a having ventilation inside. Are provided at a plurality of positions, and the conductive rib 9 is provided with a lever-like protrusion 9a, and is fitted into the notch hole 14a provided in the mounting portion 14b of the ground electrode 5, so that the conductive rib 9 and the ground electrode 5 are fitted. Is formed so as to sandwich the non-conductive rib 8 of the intake grille 4 by the connecting means 14, and the conductive rib 9 is connected to the ground electrode 5.
[0029]
Further, the shortest distance (a) between the tip of the discharge needle 3 and the ground electrode 5 shown in FIG. 1 and the shortest distance (b) between the tip of the discharge needle 3 and the conductive rib 9 of the intake grill 4 shown in FIG. The circular and flat auxiliary electrode plate 15 is provided at the shortest position from the ground electrode 5.
[0030]
Further, a clearance 17 between the dust collecting filter 6 housed in the frame portion 13 of the ground electrode 5, a cutting beam 16 formed at the time of cutting formed on the outer side of the frame portion 13, and the frame portion 13 of the ground electrode 5 is formed. And the filter unit frame 18 with the ground electrode 5 as a reference plane. The height of the frame wall of the filter unit frame 18 with respect to the ground electrode 5 is set to be larger than the height of the frame portion 13 on which the cutting beam 16 of the ground electrode 5 is formed. At the same time, the thickness dimension of the dust collecting filter 6 is formed to be larger than the frame wall height of the frame portion 13 of the ground electrode 5.
[0031]
In addition, a lattice-like filter frame 19 that holds the opening side of the non-deformable dust collection filter 6 housed in the ground electrode 5 is provided on the intake grill 4 so as to be openable and closable. A minute protrusion 20 is provided to protrude toward the side.
[0032]
Further, a storage groove 21 formed in a horizontally long shape is provided on the front surface of the intake grill 4, and a needle electrode unit 22 in which a plurality of discharge needles 3 are connected in a shape stored in the storage groove 21 is provided, and the needle electrode unit A needle-shaped electrode cover 25 having a shape that covers the needle-shaped electrode unit 22 that is fitted in the storage groove 21 and the bent piece 24 that fits into the slide projection 23 at the end of the filter unit 7. The presser rib 26 is provided on the needle electrode cover 25, and the needle electrode unit 22 is fixed by coming into contact with the recess 27 provided on the needle electrode unit 22.
[0033]
In the above configuration, when air flows through the filter unit 7 attached to the air flow path of an air conditioner or the like via the holding unit, the negative pressure applied from the high-pressure applying device 12 to the discharge needle 3 provided on the intake grill 4 A large electric field is formed near the discharge needle 3 by the high voltage and the ground electrode 5, and the electrons in the air molecules are separated, or the separated electrons are combined with another air molecule to ionize the air molecules. Air ions are diffused by the force of the electric field and adhere to the dust to charge the dust. The charged dust particles prevent the particles from being buffered and are adsorbed by the dust collecting filter 6 provided on the leeward side of the ground electrode 5. And collected.
[0034]
As described above, according to the electric dust collection unit of Embodiment 1 of the present invention, the high-pressure applying device 2 is provided at one end of the horizontally long holding unit 1 provided in the air flow path of the air conditioner or the like. The filter unit 7 is detachably provided. The filter unit 7 has a discharge needle 3 electrically connected to the high-voltage applying device 2, an intake grill 4 having a shape in which the center bulges forward, and the discharge needle 3. An air-permeable ground electrode 5 and a dust collecting filter 6 provided on the leeward side are provided, a filter unit 7 provided detachably on the holding unit 1 is provided, and the intake grill 4 is made of a non-conductive rib 8 made of a non-conductive resin. Then, the conductive ribs 9 made of a conductive material are arranged in a grid pattern, and the conductive ribs 9 are connected to the ground electrode 5 so that static electricity charged in the intake grill 4 can be released. What To prevent adhesion of dust, it becomes easier to wash difficult stains, it is possible to prevent electric shock to the human body.
[0035]
Further, since the intake grill 4 is formed so that the tip of the discharge needle 3 is seen by the projection surface and surrounded by the conductive rib 9, corona discharge from the discharge needle 3 is caused in the conductive rib 9 of the intake grill 4 other than the ground electrode 5. In addition, the discharge region of negative ions can be expanded three-dimensionally to promote negative ionization into dust and improve dust collection efficiency, and local contamination of the intake grill 4 can be prevented.
[0036]
Further, the shortest distance (a) between the tip of the discharge needle 3 and the ground electrode 5 and the shortest distance (b) between the tip of the discharge needle 3 and the conductive rib 9 of the intake grill 4 are made substantially the same, so that the discharge needle. 3 can maintain the balance of the amount of discharge from the ground electrode 5 to the conductive rib 9, stabilize the dust collection efficiency, and prevent the earth-side member from being unbalanced and deteriorating due to the discharge unbalance. Can be prevented.
[0037]
Further, a claw portion 11 is formed at the tip of the conductive rib 9 of the intake grill 4, a concave engagement portion 12 is provided on the intake grill 4 formed of a non-conductive resin, and the claw portion 11 is made into the engagement portion 12. By engaging and attaching the conductive rib 9, the ground discharge between the discharge needle 3 and the tip of the conductive rib 9 can be prevented, safety can be maintained, positioning of the conductive rib 9 can be ensured, and assembly work can be performed easily. it can.
[0038]
Further, a ground electrode 5 having a metal frame portion 13 on the outer periphery, and a connecting means 14 for connecting the frame portion 13 of the ground electrode 5 and the conductive rib 9 of the intake grill 4 at a plurality of locations are provided. By sandwiching the non-conductive rib 8 of the intake grille 4, it is easy to assemble without connecting parts such as screws to connect to the ground electrode 5 and connect the conductive rib 9 to the ground. As a sandwich structure in which the rib 8 is sandwiched, after assembly, the frame-structured ground electrode 5 and the intake grill 4 can be integrated to form a rigid filter unit 7, which is strong enough to withstand attachment / detachment to the holding unit 1. Thus, it is possible to prevent noise due to resonance during operation.
[0039]
In addition, by providing the flat auxiliary electrode 15 at the shortest position with the discharge needle 3 on the ground electrode 5 provided on the leeward side of the discharge needle 3, the edge of the lath mesh 5 a forming the ground electrode 5 is locally present. In addition, it is possible to prevent the phenomenon that dust is locally attached to the lath net 5a and deteriorate due to corona discharge, and the range of the corona discharge to the ground electrode 5 can be expanded to improve the dust collection efficiency.
[0040]
Further, the dust collecting filter 6 housed in the frame portion 13 of the earth electrode 5, the cutting beam 16 formed on the outer side of the frame portion 13, and the gap 17 between the frame portion 13 of the earth electrode 5 are enclosed. And the filter unit frame 18 with the ground electrode 5 as a reference plane is made higher than the height of the frame portion 13 of the ground electrode 5 and the thickness dimension of the dust collecting filter 6 is provided. Is made larger than the frame wall height of the frame portion 13 of the ground electrode 5, the height of the frame wall of the filter unit frame 18 and the thickness dimension of the dust collecting filter 6 are It becomes higher than the cutting beam 16 generated when the metal part formed on the outer side is cut, and even if the cutting beam 16 is not removed by the deburring process, the cutting beam 16 does not get in the way and the processing man-hour is reduced. Kos It can be achieved down.
[0041]
The filter unit 7 includes a non-deformable dust collection filter 6 housed in the ground electrode 5 and a grid-like filter frame 19 that holds the opening side of the dust collection filter 6. By providing the minute projections 20 projecting toward the dust collection filter 6 side, a minute space is formed between the dust collection filter 6 and the filter frame 19 so that the entire dust collection filter 6 can be ventilated. Dust performance can be improved.
[0042]
Also, a storage groove 21 formed in a horizontally long shape on the front surface of the intake grill 4, a needle electrode unit 22 in which a plurality of discharge needles 3 are connected in a shape stored in the storage groove 21, and the high pressure of the needle electrode unit 22. It is provided with a bent piece 24 that fits into the slide projection 23 at the end of the filter unit 7 in an L shape that serves as a receiving terminal, and a needle-like electrode cover 25 that covers the needle-like electrode unit 22 that fits into the storage groove 21. Since the presser rib 26 is provided on the needle electrode cover 25 and is fixed in contact with the concave portion 27 provided on the needle electrode unit 22, the filter unit 7 can be easily fixed at a predetermined position without using a screw or the like. Thus, the discharge needle 3 can be fixed with high accuracy and the dust collection performance can be prevented from being deteriorated due to variations in the mounting operation.
[0043]
【The invention's effect】
As is clear from the above embodiments, according to the present invention, a horizontally long holding unit provided in an air flow path of an air conditioner, etc., a high-pressure applying device provided at one end of the holding unit, and the holding unit An intake grille having a discharge unit electrically connected to the high-voltage applying device and having a center bulging forward and a leeward side of the discharge needle. A grounding electrode capable of ventilating and a dust collecting filter are provided, and a filter unit is provided detachably on the holding unit, and the intake grill is provided with a nonconductive rib made of a nonconductive resin and a conductive rib made of a conductive material. Since it has been formed in a lattice shape and has a structure in which the conductive rib is connected to the ground electrode, it prevents dust from adhering to the intake grille, makes it difficult to get dirty and easy to clean. It can provide an electric dust collecting unit that can reduce the risk of electric shock to the human body.
[0044]
Further, since the intake grille is formed so that the tip of the discharge needle is seen by the projection plane and surrounded by the conductive rib, it is possible to improve the dust collection efficiency and prevent local dirt on the intake grille.
[0045]
In addition, since the shortest distance between the tip of the discharge needle and the ground electrode and the shortest distance between the tip of the discharge needle and the conductive rib of the intake grill are substantially the same, the dust collection efficiency can be stabilized and the ground It is possible to prevent the side member from being unevenly distributed or deteriorated due to the contamination.
[0046]
Also, a claw portion is formed at the front end of the conductive rib of the intake grille, a concave engagement portion is provided on the intake grill formed of non-conductive resin, and the claw portion is engaged with the engagement portion to connect the conductive rib. Therefore, it is possible to prevent arc discharge, maintain safety, ensure the positioning of the conductive rib, and easily perform the assembling work.
[0047]
And a ground electrode having a metal frame portion on the outer periphery, and a connecting means for connecting the frame portion of the ground electrode and the conductive rib of the intake grill at a plurality of locations, the non-conductive rib of the intake grill being provided by the connecting means. Therefore, the assembling work is easy and a rigid filter unit can be formed, and the generation of vibration noise due to resonance can be prevented.
[0048]
Further, since the flat auxiliary electrode plate is provided at the shortest position with the discharge needle on the ground electrode provided on the leeward side of the discharge needle, it is possible to prevent the phenomenon that dust is locally attached to the lath net and deteriorated. At the same time, dust collection efficiency can be improved.
[0049]
A dust collecting filter housed in the frame portion of the ground electrode; a cutting beam formed on an outer side of the frame portion; and a filter unit frame surrounded by a gap between the frame portion of the ground electrode. The height of the frame wall of the filter unit frame with respect to the ground electrode as a reference plane is made larger than the height of the frame portion of the ground electrode, and the thickness dimension of the dust collecting filter is set to the frame wall of the frame portion of the ground electrode. Since it is larger than the height, even if the cutting burr is not removed by deburring, the cutting burr does not get in the way and safety is maintained, the number of processing steps can be reduced, and the cost can be reduced.
[0050]
And a filter unit provided with a non-deformable dust collecting filter housed in the ground electrode and a grid-like filter frame that holds the opening side of the dust collecting filter, and the dust collecting filter side of the filter frame grid Since the minute projections projecting toward are provided, the entire dust collection filter can be ventilated and the dust collection performance can be improved.
[0051]
Also, a storage groove formed in a horizontally long shape on the front surface of the intake grille, a needle electrode unit in which a plurality of discharge needles are connected in a shape stored in the storage groove, and a high voltage receiving terminal of the needle electrode unit An L-shaped bent piece that fits into the slide protrusion at the end of the filter unit; and a needle-like electrode cover that covers the needle-like electrode unit that fits into the storage groove; The discharge needle can be fixed with high accuracy without using a screw or the like at a predetermined position of the filter unit. Defects in dust collection performance due to variations can be prevented.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a filter unit of an electric dust collection unit according to a first embodiment of the present invention. FIG. 2 is a front view of a holding unit of the electric dust collection unit. Front view [FIG. 4] An external perspective view showing an engaging portion for engaging a conductive rib of the same electric dust collecting unit. [FIG. 5] A perspective view of a principal part showing an engaged state of the conductive rib of the same electric dust collecting unit. FIG. 6 is a perspective view of the ground electrode of the electric dust collection unit. FIG. 7 is a perspective view showing a coupling state of the ground electrode and the conductive rib of the electric dust collection unit. Fig. 9 is a front view of the main part showing the relationship with the conductive rib. Fig. 9 is a front view of the main part showing the auxiliary electrode plate of the electric dust collection unit. Fig. 10 is a diagram showing the relationship between the filter unit frame of the electric dust collection unit and the ground electrode. Sectional view [Fig. 11] FIG. 12 is a side view showing the relationship between the intake grill of the electric dust collection unit and the filter frame. FIG. 13 is an exploded perspective view showing a state when the dust collection filter of the electric dust collection unit is attached. FIG. 14 is an exploded perspective view showing the relationship between the intake grille of the electric dust collection unit, the needle unit, and the needle electrode cover. FIG. 15 is an exploded view of the intake grille, needle unit, and needle electrode cover of the electric dust collection unit. FIG. 16 is a cross-sectional view showing the configuration of a conventional filter device of the electrostatic dust collection unit. FIG. 17 is a rear view of the filter frame of the electrostatic dust collection unit. Front view of the filter device [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Holding unit 2 High voltage application apparatus 3 Discharge needle 4 Intake grill 5 Ground electrode 6 Dust collection filter 7 Filter unit 8 Non-conductive rib 9 Conductive rib 11 Claw part 12 Engagement part 13 Frame part 14 Connection means 15 Auxiliary electrode plate 16 Cutting beam 17 Gap 18 Filter unit frame 19 Filter frame 19a Lattice 20 Minute protrusion 21 Storage groove 22 Needle electrode knit 23 Slide protrusion 24 Bending piece 25 Needle electrode cover 26 Pressing rib 27 Recess

Claims

A horizontally long holding unit provided in an air flow path such as an air conditioner;
A high-voltage applying device provided at one end of the holding unit;
A filter unit detachably provided on the holding unit;
This filter unit has an intake grille having a shape in which a center bulges forward and includes a discharge needle electrically connected to the high-voltage applying device,
A grounding electrode and a dust collecting filter provided on the leeward side of the discharge needle are provided,
The intake grill is formed by disposing conductive ribs made of lattice-like conductive resin on the leeward side and non-conductive ribs made of lattice-like nonconductive resin on the leeward side,
Connecting the conductive rib to a ground electrode;
An electric dust collection unit in which the tip of the discharge needle is surrounded by a conductive rib when viewed from the windward side.

The electric dust collection unit according to claim 1, wherein the shortest distance between the discharge needle tip and the ground electrode and the shortest distance between the discharge needle tip and the conductive rib of the intake grill are substantially the same.

A claw portion is formed at the tip of the conductive rib of the intake grill, a concave engagement portion is provided on the intake grill formed of non-conductive resin, and the conductive rib is attached by engaging the claw portion with the engagement portion. The electric dust collection unit according to claim 1, which is configured.

The ground electrode may have a metal frame portion to the outer periphery,
Constitutes a mounting portion projecting into the intake grille side with the frame portion of this, the connecting means between the projections provided on the guide ionization blanking of the intake grille,
2. The electric dust collecting unit according to claim 1 , wherein the connecting means is connected via a non-conductive rib of the intake grill .

2. The electrostatic precipitator unit according to claim 1, wherein a flat auxiliary electrode plate is provided at a position closest to the discharge needle on the ground electrode provided on the leeward side of the discharge needle.

A dust collecting filter housed in a frame portion of the ground electrode, a cutting beam formed on an outer side of the frame portion, and a filter unit frame surrounded by a gap between the frame portion of the ground electrode, The height of the frame wall of the filter unit frame with respect to the ground electrode as a reference plane is made larger than the height of the frame portion of the ground electrode, and the thickness dimension of the dust collecting filter is made larger than the height of the frame wall of the frame portion of the ground electrode. The electric dust collection unit according to claim 1, wherein the electric dust collection unit is large.

A filter unit including a non-deformable dust collection filter housed in a ground electrode and a grid-like filter frame that holds the opening side of the dust collection filter is provided, and the filter frame grid faces the dust collection filter side. The electric dust collection unit according to claim 1, further comprising a protruding microprojection.

A storage groove formed in a horizontally long shape on the front surface of the intake grille, a needle electrode unit in which a plurality of discharge needles are connected in a shape stored in the storage groove, and an L-shape serving as a high-voltage receiving terminal of the needle electrode unit A bent piece that fits into the slide protrusion at the end of the filter unit and a needle-like electrode cover that covers the needle-like electrode unit that fits into the storage groove, and a presser rib is provided on the needle-like electrode cover The electric dust collection unit according to claim 1, wherein the electrostatic dust collection unit is configured to contact and be fixed to a recess provided in the needle electrode unit.