JP3591723B2 - Discharge device - Google Patents

Discharge device Download PDF

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Publication number
JP3591723B2
JP3591723B2 JP2001274660A JP2001274660A JP3591723B2 JP 3591723 B2 JP3591723 B2 JP 3591723B2 JP 2001274660 A JP2001274660 A JP 2001274660A JP 2001274660 A JP2001274660 A JP 2001274660A JP 3591723 B2 JP3591723 B2 JP 3591723B2
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Prior art keywords
electrode
discharge
dielectric
counter electrode
cylinder
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JP2003086330A (en
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謙治 遠藤
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Kyushu Hitachi Maxell Ltd
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Kyushu Hitachi Maxell Ltd
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01TSPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T19/00Devices providing for corona discharge
    • H01T19/04Devices providing for corona discharge having pointed electrodes
    • AHUMAN NECESSITIES
    • A45HAND OR TRAVELLING ARTICLES
    • A45DHAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D20/00Hair drying devices; Accessories therefor
    • A45D20/04Hot-air producers
    • A45D20/08Hot-air producers heated electrically
    • A45D20/10Hand-held drying devices, e.g. air douches
    • A45D20/12Details thereof or accessories therefor, e.g. nozzles, stands
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01TSPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T23/00Apparatus for generating ions to be introduced into non-enclosed gases, e.g. into the atmosphere
    • AHUMAN NECESSITIES
    • A45HAND OR TRAVELLING ARTICLES
    • A45DHAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D2200/00Details not otherwise provided for in A45D
    • A45D2200/20Additional enhancing means
    • A45D2200/202Ionisation

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Cleaning And Drying Hair (AREA)
  • Electrostatic Separation (AREA)
  • Oxygen, Ozone, And Oxides In General (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、マイナスイオン、プラスイオン、およびオゾンを生成するための放電装置、なかでも尖端放電方式の放電装置に関する。
【0002】
【従来の技術】
マイナスイオンやオゾンを生成するための放電装置には、例えば特開平11−60209号公報にみられる沿面放電方式と、特許第3017146号公報にみられる尖端放電方式等が知られている。後者においては、両端が開口する筒状の対向電極と、対向電極の開口部の外側に配置した中央電極と、両電極を位置保持する電極取付部材とで放電装置を構成している。実用新案登録第3061585号公報には、筒状の誘電体の外面に対向電極を、筒内面に複数の放電電極を配置した放電装置が開示されている。
【0003】
【発明が解決しようとする課題】
上記のように、筒状の対向電極と、対向電極の開口部の外側に配置した中央電極とで構成した放電装置によれば、生成したオゾンやマイナスイオンを、電動ファンを用いる必要もなく対向電極の筒軸芯に沿って送給できる。しかし、電極取付部材に固定した片持ち梁状の腕と、腕の尖端に固定される電極ホルダーとで、中央電極を対向電極の中心軸上に位置保持するので、長期使用時に中央電極の尖端が対向電極の中心軸線からずれやすい。このように対向電極の開口縁と中央電極の尖端との距離が不均等になると、電界が局部的に集中し不整放電(火花放電)を生じ、不整放電を生じた部分が放電時の熱で溶けたり、誘電体が過熱されて劣化するおそれがある。周辺空気を取り込んでマイナスイオンを生成する場合には、空気と共に取り込まれた塵埃が対向電極や誘電筒に付着し、長期使用時に堆積した塵埃塊に電界が集中して火花放電を生じることもある。
【0004】
生成したオゾンやマイナスイオンをオゾン風やイオン風の自己送給作用のみで送り出す放電装置は、集塵装置として、あるいは生成したオゾンによる食品等の殺菌、脱色、脱臭などの用途に適用するのには問題ないが、マイナスイオンを遠方にまで到達させる用途には適さない。放電装置を組み込んだヘアードライヤーにおいては、例えばマイナスイオンをファンで生起した空気流と共に毛髪に吹き付けるが、自己送給作用のみでマイナスイオンを送り出す放電装置を適用した場合、マイナスイオンが送給経路の途中において空気流の中に薄く拡散しあるいは減耗するため、マイナスイオンを分布密度が高い状態で効果的に送給できないのである。
【0005】
本発明の目的は、中央電極と対向電極との相対的な位置関係を常に適正に保持でき、従って電界が局部的に集中して不整放電が生じるのを解消し、長期使用時にも常に効果的にマイナスイオンやオゾン等を生成することができる放電装置を提供することにある。本発明の目的は、空気中に含まれる塵埃の堆積や付着に伴う不整放電やトラッキング現象を防止できる放電装置を提供することにある。本発明の目的は、両電極を絶縁遮断する誘電体がオゾンや熱によって劣化するのを解消でき、耐久性に優れた放電装置を提供することにある。本発明の目的は、生成したイオンやオゾンを送風装置で生起した空気流に乗せて遠くまで送ることができ、しかもイオンが送給経路の途中において空気流の中に薄く拡散しあるいは減耗するのを防止でき、イオンを分布密度が高い状態で遠方まで効果的に送給できる、ヘアードライヤー等の温風供給機に適用して好適な放電装置を提供することにある。
【0006】
【課題を解決するための手段】
本発明の放電装置は、図1および図2に示すごとく、中央電極30と、中央電極30の周りを囲む対向電極31と、中央電極30と対向電極31との間を絶縁遮断する誘電体部32と、絶縁性のプラスチック材で成形された電極ホルダー29とを備えている。電極ホルダー29の一側に、中央電極支持部38と筒壁35とを形成する。中央電極支持部38に固定した中央電極30と、誘電体部32と、筒壁35に固定した対向電極31とを、中央電極30を中心にして同心円状に配置する。
【0007】
誘電体部32は、図1に示すごとく、中央電極30の前端の放電部42より前方へ大きく突出するように設けることができる。
【0008】
誘電体部32は、中央電極30と対向電極31との間を絶縁遮断する誘電筒体46と、対向電極31を支持する筒壁35とで構成する。
【0009】
誘電筒体46は、雲母、ガラス、セラミックス等の無機質絶縁体で筒状に形成する。誘電筒体46は筒壁35の内面に固定する。
【0010】
中央電極30と対向電極31とは、それぞれ電極ホルダー29の一側において給電用のリード線47に接続されており、中央電極30とリード線47との接続部分が、電極ホルダー29に設けた逃げ凹部36に収容されて、逃げ凹部36に充填したシール材48で封止されている。
【0011】
中央電極30と対向電極31との間のコロナ放電で生成したイオンないしオゾンを、電極ホルダー29の一方から他方へ向かって強制的に送給するイオン送給手段を備えており、このイオン送給手段が、空気流を生起する送風装置6を含んでいる。
【0012】
イオン送給手段は、送風装置6と、誘電体部32および対向電極31の外面を覆う導風筒23とからなり、導風筒23は前後端が開口していて、送風装置6で生起した空気流を誘電体部32および対向電極31の後方から前方へ向かって強制的に流動案内できる。
【0013】
また、誘電体部32で囲まれる放電空間S内に中央電極30を設け、電極ホルダー29には、図10に示すごとく、送風装置6で生起した空気流を放電空間Sへ導入案内する導風通路56を形成しておくことができる。
【0014】
導風筒23は、誘電体部32および対向電極31の周囲を囲む第1筒部24を備えている。誘電体部32と第1筒部24との間にオリフィス部Rを形成する。
【0015】
導風筒23は、誘電体部32および対向電極31の周囲を囲む第1筒部24と、第1筒部24に連続して前方へ突出する第2筒部25とで構成する。
【0016】
【発明の作用効果】
本発明の放電装置においては、絶縁性のプラスチック材で成形した電極ホルダー29に筒壁35と中央電極支持部38を設け、中央電極支持部38に固定した中央電極30と、誘電体部32と、筒壁35に固定した対向電極31の三者を、中央電極30を中心にして同心円状に配置するので、放電装置16の構成部品点数を最小限化しながらその構造強度を向上でき、中央電極30と誘電体部32と対向電極31との三者の位置関係を長期に亘って適正に位置決めできる。従って電界が局部的に集中して不整放電が生じるのを確実に解消できる。長期使用時にも中央電極30の位置ずれをよく防止するので、常に効果的にマイナスイオンやオゾン等を生成できる。また、両電極30・31および誘電体部32を、電極ホルダー29と一体化することにより、放電装置16を1個のユニット部品として取り扱うことができ、各電極30・31の電極ホルダー29に対する組み付けが正確にしかも容易に行える。
【0017】
誘電体部32が中央電極30の前端の放電部42より前方へ大きく突出していると、放電部42の周囲を誘電体部32で覆って、空気中に浮遊する塵埃が放電部42に付着して堆積するのを確実に防止できる。従って、長期にわたって放電装置16を使用する場合に、堆積したほこりを介して電界が歪み、不整放電が生じるのを防止でき、従来のこの種放電装置に比べて信頼性を向上できる。
【0018】
誘電体部32を誘電筒体46と筒壁35とで構成すると、中央電極30と対向電極31との間を誘電筒体46と筒壁35とで2重に絶縁できるので、両電極30・31の位置関係に僅かなずれが生じて電界が歪む場合にも、火花放電が生じるのを確実に防止してイオンおよびオゾンを効果的に生成できる。誘電筒体46で放電部42の周囲を覆って、塵埃等が放電部42に付着して堆積するのを防止でき、例えばマイナスイオンが対向電極31側に引き寄せられるのも確実に防止できる。
【0019】
雲母、ガラス、セラミックス等の無機質絶縁体で誘電筒体46を筒状に形成すると、耐熱性、耐オゾン性に優れた誘電筒体46が得られ、長期使用時にも誘電筒耐46の劣化を防止して、劣化に伴う絶縁破壊を解消できる。とくに、前方に突出した誘電筒体46が無機質絶縁体で構成されるので、万一トラッキング現象が起きたとしても、耐熱性に優れるので、誘電体部32の破損を防止することができる。
【0020】
中央電極30とリード線47との接続部分を電極ホルダー29の逃げ凹部36に収容し、逃げ凹部36に充填したシール材48で接続部分を封止して絶縁してあると、中央電極30および対向電極31のリード線47との接続部の側で、火花放電が生じるのを防止できる。
【0021】
生成したイオンないしオゾンが、空気流を生起する送風装置6で一方向へ強制的に送給されるイオン送給手段を備えた放電装置16によれば、イオン風やオゾン風の自己送給作用のみで送り出す場合に比べて、イオンないしオゾンを空気流に乗せた状態でより遠くまで確実に送給でき、空気流と共に送給されたイオンやオゾンの分布密度を向上できる。
【0022】
誘電体部32および対向電極31の外面を覆う導風筒23と送風装置6とで構成したイオン送給手段によれば、生成したイオンないしオゾンを導風筒23によって隔離案内できるので、イオンやオゾンが空気中に広く拡散し、分布密度が低下するの防止できるとともに、イオンが導風筒23の周辺の部品表面等に接触して電気的に中和するのを確実に防止できる。イオンやオゾンは導風筒23を通過する空気流に乗せた状態で、誘電体部32および対向電極31の後方から前方へ向かって強制的に流動させるので、開放された空気流で移送する場合に比べて、イオンやオゾンの到達距離を大きくできる。例えば、放電装置をヘアードライヤーに適用するような場合には、イオンが送風経路で減耗し、あるいは毛髪と接触できないまま無駄に放出されてしまうのを解消して、効果的にマイナスイオンを毛髪へ吹き付けることができる。
【0023】
図10に示すごとく電極ホルダー29に導風通路56を形成し、送風装置6で生起した空気流を導風通路56を介して放電空間Sへ直接に導入案内できるようにした放電装置によれば、放電空間Sに浮遊するイオンやオゾンを、空気流に乗せて放電空間Sの外へ強制的に排出できるので、中央電極30の近傍に浮遊するイオンやオゾンが対向電極31あるいは中央電極30に吸着されて中和消滅するのを確実に防止できる。また、微少水滴等を含んだ新鮮な空気を積極的に導入できるので、イオン量の低下を可及的に防止できる。
【0024】
誘電体部32の筒端を第1筒部24に臨ませて、誘電体部32と第1筒部24との間にオリフィス部Rを形成した導風筒23によれば、オリフィス部Rを通過する空気流の流速が他の部位より増加し、生成したイオンやオゾンを、流速は高いが圧力は低い空気流に吸い込んで速やかに下流側へ送給できる。とくに、誘電筒体28の先端近傍を浮遊し対向電極31に向かおうとするイオンが早い流速によって押し戻されるので、対向電極31に吸着されて中和消滅されるのを確実に防止でき、イオンを分布密度が高い状態のままで効果的に送給することができる。
【0025】
第1筒部24に連続して前方へ突出する第2筒部25を設けた導風筒23によれば、イオンやオゾンをオリフィス部Rを通過した後も移行案内できるので、その分だけ空気流の到達距離が更に大きくなる。
【0026】
【実施例】
図1ないし図5は本発明の放電装置をヘアードライヤーに適用した実施例を示す。図2においてヘアードライヤーは、横長筒状の本体ケース1と、その下面一側に設けたハンドル2とを有し、これらの内部に送風ユニットや、制御用の電気部品等を収容してなる。本体ケース1の前端側には、ファン6(送風装置)で生起した空気流を流動案内する風導体1Aが装着してある。ハンドル2の前面および後面には、風量制御とヒータスイッチを兼ねる電源スイッチノブ3と、イオン発生部への通電をオン・オフするイオンスイッチノブ4が設けてある。ハンドル2の内部には、先のスイッチノブ3・4で切り換え操作されるスイッチが収容してある。想像線で示すように、ハンドル2は本体ケース1に対して折り畳み可能に連結してある。
【0027】
本体ケース1内において送風ユニットは、モーターケース5と、モーターケース5に組み付けられるモーター7およびファン6と、十文字状に組まれた絶縁枠8に螺旋状に巻き付けられるヒーター9とを含む。ファン6は一方向へ回転駆動されて、本体ケース1の後端の吸込み口10から吸い込んだ空気を加圧して、前端の風導体1Aの吹出し口11から吹き出す。後述するように、ファン6はイオン生成手段で生成したイオンを吹出し口11からできるだけ遠くまで送り出すための送風装置を兼ねる。
【0028】
ファン6で生起した空気流と共にマイナスイオンを毛髪に吹き付けるために、イオン生成手段が本体ケース1内に組み込まれている。図3においてイオン生成手段は、商用電源(100V)からの電流を半波整流する整流回路13と、整流した後の電流をパルス電流に変換するパルス発生回路14と、パルス電流を例えば4kVの高電圧に昇圧するトランス15と、放電装置16と、トランス15と放電装置16との間に設けられるダイオード17などで構成してある。整流回路13とパルス発生回路14とは回路基板18に実装されており、回路基板18と昇圧用のトランス15は、ヒーター9用の絶縁枠8を切り欠いて形成した空間に配置され、放電装置16は風導体1Aの内部に組み込んである。
【0029】
図4ないし図6において風導体1Aの内部には、整流筒20と吹出しグリル21とが組み込んであり、先の放電装置16を整流筒20で支持して、ファン6で生起した空気流のほぼ中央に放電装置16を保持している。整流筒20は、断面円形の筒壁を有し、その内部前端に放射状に設けた整流翼22と、筒壁の中央に設けた導風筒23とを一体に形成したプラスチック成形品からなる。吹出しグリル21を風導体1Aの内部に嵌め込んだ後、整流筒20を風導体1Aに内嵌固定することにより、これら三者が1個のユニット部品として取り扱えるようになっている。整流翼22は、ファン6で生起された旋回する空気流を直線状の空気流に整流する。
【0030】
図1において導風筒23は、先すぼまりテーパー状の第1筒部24と第1筒部24の前側の小径端に連続して前方へ突出する第2筒部25とで形成してあり、第1筒部24の内部に放電装置16を組み込んである。第2筒部25の前端は、風導体1Aの吹出し口11の中央に位置する状態で、吹出しグリル21および吹出し口11の開口面より外側へ突出している。符号26は導風筒23の後ろ側の入り口、27は導風筒23の前側の出口である。
【0031】
図1において放電装置16は、電極ホルダー29と、電極ホルダー29の前側中央部に固定される中央電極30、および中央電極30の周りを囲む対向電極31と、中央電極30と対向電極31との間の空間を絶縁遮断する誘電体部32とで構成する。電極ホルダー29は、多段軸状のボス部33と、ボス部33の外周に設けた放射状の保持腕34と、リング状の対向電極31を密着状に嵌合するための円筒状の筒壁35と、先端がとがった棒状の中央電極30を周囲から固定支持するための中央電極支持部38とを一体成形したプラスチック成形品からなる。電極ホルダー29の成形材料としては、導電性プラスチックではない絶縁性プラスチック材を使用できるが、筒壁35の誘電特性を鑑みれば、誘電特性に優れ、耐オゾン性、耐熱性を有するプラスチック材、例えばポリフェニレンサルファイド(PPS)、ポリブチレンテレフタレート(PBT)、ポリエチレン(PE)などが好ましい。ボス部33の前側には対向電極31を支持する筒壁35を形成し、後ろ側には逃げ凹部36が形成してある。保持腕34を第1筒部24の内面に設けた凹部37に嵌め込み固定することにより、電極ホルダー29を整流筒20に位置決め固定できる。
【0032】
中央電極30は放電抵抗が小さなタングステンで形成した放電針40と、放電針40の後端に圧入固定した位置決めボス41とで構成してあり、放電針40の前端を尖らせて放電部42としている。中央電極30は電極ホルダー29の中心の取付孔に差し込み或いは圧入装着(いずれも放電針40は取付孔に対して密着)されるが、その位置決めボス41を取付穴に嵌め込むことにより、放電針40が電極ホルダー29の中心軸上に位置決めされた状態で、しっかりと固定できる。放電針40の固定部としては、中央電極支持部38に形成された取付孔の中途部分とボス41で固定された放電針40の後端部分であり、固定部前端から突出する自由端側(放電部42側)の長さより充分長く構成している。従って、中央電極30のぐらつき防止効果が高く、中央電極30と誘電体32と対向電極31との三者の位置関係を適正に位置決めできる。特に、放電針40の中途が、誘電体部兼用の対向電極31の支持部である筒壁35と一体成形で構成された中央電極支持部38に固定支持されてあるので、従来のような組み付け時の誤差が少なく、さらに適正な位置決めが可能である。図5において対向電極31は、銅または鉄製の薄板を素材にして形成したプレス金具からなり、周面の一箇所が分断されたリング状の電極部43と、電極部43の後縁から後ろ向きに延びる4個の取付脚44とを一体に備えている。電極部43を電極ホルダー29の断面円形の筒壁35に外嵌し、その取付脚44を電極ホルダー29の周面段部に折り曲げて固定することにより、電極部43を中央電極30に対して同心円状に位置決めした状態で固定できる。この取り付け状態において、両電極30・31の前端は、同一平面状に位置している。詳しくは、中央電極30の前端の放電部42と、対向電極31の前端の放電縁面45とが、筒壁35の前側開口面を含んで中央電極30の中心軸線と直交する平面上に位置している(図1参照)。
【0033】
誘電体部32は、中央電極30と対向電極31との間で火花放電が発生しないよう絶縁遮断する誘電筒体46と、円筒状の対向電極31を外嵌支持する円筒状の筒壁35とで構成されている。誘電筒体46は雲母、ガラス、セラミックスなどの高度の絶縁特性・耐熱性を備えた無機質の絶縁(誘電)素材で円筒状に形成する。因みに雲母を素材とする場合には、天然雲母を粉状にし、円筒状に成形したものを用いる。また、ガラスとしては、耐熱性に優れた結晶化ガラス、石英ガラス、硼珪酸ガラス等が好ましい。セラミックスを素材とする場合には、ケイ酸塩、アルミナ、ジルコニア、ステアタイト、チタン酸バリウム等を主原料とする粉末を焼成して円筒状に形成したものを用いる。誘電筒体46としてセラミックスを用いれば、電子の移動を阻止する絶縁遮断効果に加え、ドライヤー等温風装置に適用した場合に、遠赤外線が放射されるので、毛髪の乾燥向上効果が期待でき、また身体の治療効果も期待できる。
【0034】
誘電筒体46は、その後端を筒壁35の内面に嵌め込み固定して電極ホルダー29と一体化されており、この固定状態において対向電極31と誘電筒体46とは、中央電極30を中心とする同心円の関係にあり、誘電筒体46の前部筒端は、第1筒部24の前端寄り部に臨んで誘電筒体46と第1筒部24との間にオリフィス部Rを形成している。中央電極30と対向電極31との間で不整放電が生じるのを防いで、効果的にマイナスイオンを生成するために、誘電筒体46は中央電極30の放電部42より前方へ大きく突出している。図1に示すように中央電極30とトランス15および対向電極31とトランス15とは、それぞれリード線47で接続するが、リード線47が半田付けされた個所の間でスパークが生じるのを防ぐために、中央電極30とリード線47とは、ボス部33の後ろ側の逃げ凹部36内に収容し、該凹部36に充填した絶縁性のシール材48で封止してある。シール材としてはシリコン等の絶縁性の接着剤を用いることができる。
【0035】
上記構成の放電装置16によれば、トランス15で昇圧した高電圧のうち、ダイオード17を通過したマイナス電流のみを中央電極30に印加することにより、中央電極30から対向電極31に向けて電子を放出し、空気中の酸素、微少水滴、塵等をマイナスに帯電させてマイナスイオン化できる。放電装置16で生成されたマイナスイオンは、導風筒23内に導入された空気流によって、第2筒部25を経由してその出口27から前方へ吹き出る。このとき、導風筒23内に導入された空気流は、通路断面積が他より小さなオリフィス部Rを通過する時に流速が増加し圧力が低下する。そのため、両電極30・31の周辺に浮遊するマイナスイオンやオゾンは、オリフィス部Rを通過する空気流に吸引されて速やかに第2筒部25へと送り込まれる。従って、誘電筒体28の先端近傍に浮遊し、対向電極31に向かおうとするイオンが対向電極31に吸着されて中和消滅するのを防止して、分布密度が高い状態のイオン流を形成できる。
【0036】
マイナスイオンを導風筒23内に封じ込んだ状態で吹出し口11まで供給できるので、マイナスイオンが放電装置16と吹出し口11との間の風導部を通過する主たる空気流の中に拡散して、その分布密度が低下するの防止できるうえ、マイナスイオンが風導部内に組み込まれたケースや吹出しグリル21などの部品の表面と接触して電気的に中和するのを確実に防止できる。さらに、導風筒23の出口27は、吹出し口11の中央に位置して、吹出し口11の開口面より前方に突出しているので、導風筒23の出口27から放出されたマイナスイオンは、吹出し口11から吹出される空気流の中心に包まれた状態で確実に毛髪へ到達できる。吹出し口11の直前に整流翼22を設けて、吹出し口11から吹き出される主たる空気の流れが旋回するのを抑止できるので、導風筒23から出たマイナスイオンが主たる空気流の中に拡散するのをよく防止でき、この点でもマイナスイオンの毛髪への到達量を向上できる。
【0037】
ヘアードライヤーでは、図8に示すように、必要に応じて風導体1Aの吹出し口11に先すぼまり円筒状のノズル50を付加して使用することがある。そのノズル50の内面には内筒51を固定してある。内筒50の内面には、木の葉形の整流翼52(図9参照)を設け、その中央部に前後向きの保持ボス53が一体に形成されている。保持ボス53には通路筒54を内嵌装着してあり、ノズル50を風導体1Aの吹出し口11に装着した状態においては、通路筒54が導風筒23の出口27に隣接して、導風筒23から出たマイナスイオンをノズル50の吹出し口55の開口面の中央へ移行案内する。このように、ノズル50側に設けた通路筒54でマイナスイオンを吹出し口55の開口面へ移行案内すると、マイナスイオンがノズル内部を通過する主たる空気流の中に拡散するのを防止して、マイナスイオンを毛髪に対して分布密度が高い状態で効果的に送給することができる。
【0038】
図10は放電装置の別実施例を示す。そこでは、電極ホルダー29のボス部33に、これの後端から誘電筒体46で囲まれる放電空間S内へ向かって導風通路56を形成し、ファン6で生起した空気流を導風通路56を介して放電空間Sへ直接に導入できるようにした。この場合には、図10の想像線で示すように、電極ホルダー29の後部に前すぼまりテーパー状のガイド筒57を設けて、ファン6で生起した空気流の一部を放電空間Sへ効率よく導入することができる。このように、ファン6で生起した空気流は導風通路56を介して放電空間Sへ直接導入すると、放電空間Sに浮遊するイオンやオゾンを、空気流に乗せて放電空間Sの外へ強制的に排出でき、放電空間Sの近傍に浮遊するイオンやオゾンが対向電極31あるいは中央電極30に吸着されて中和消滅するのを防止できる。
【0039】
図11は中央電極30の固定構造の別の実施例を示す。図11(a)では、中央電極30を放電針40のみで形成し、放電針40を中央電極支持部38に設けた装着穴に圧入し、さらに針後端を逃げ凹部36に充填したシール材48で固めて、放電針40を電極ホルダー29に対して位置決めした状態の許で強固に固定できるようにした。ここでも、先の実施例と同様に、放電針40の固定部の長さを、固定部前端から突出する自由端側(放電部42側)の長さより充分長く構成しているので、放電針40のぐらつきを確実に防止でき、中央電極30と誘電体32と対向電極31との三者の位置関係を適正に位置決めできる。しかも、中央電極支持部38は、誘電体部兼用の対向電極31の支持部である筒壁35と一体成形で構成されてあるので、組み付け時の誤差が少なく、さらに適正な位置決めが可能である。なお、放電針40は、電極ホルダーに対しインサート成形されたものであってもよい。図11(b)では、先の実施例と同様に、中央電極30を放電針40と、放電針40の後端に固定した位置決めボス41とで構成するが、中央電極支持部38に設けられる通口を放電針40の直径より大きく形成して、位置決めボス41を取付穴に嵌め込むことによって、中央電極30の位置決めと固定を行うようにした。
【0040】
図12は放電装置の別実施例を示す。そこでは、導風筒23を直線筒で形成し、誘電筒体46の前部を前拡がりテーパー筒状に形成して、誘電筒体46の突端と導風筒23との間にオリフィス部Rを形成した。このように、オリフィス部Rは導風筒23と誘電筒体46との間に形成してあればよく、必要があれば導風筒23の内面、あるいは誘電筒体46の外面に別ピースを組み付けてオリフィス部Rを形成することができる。
【0041】
上記の実施例以外に、中央電極30は針状である必要はなく、細い筒状に形成されていてもよく、その場合には、筒の先端縁を鋸歯状に尖らせて複数の放電部42を形成することができる。放電部42は、その先端を筒壁35の開口面より前方へ突出させておくことができる。中央電極30の前端の放電部42と、対向電極31の前端の放電縁面45とは、必ずしも中央電極30の中心軸線と直交する平面上に位置させる必要はない。例えば、放電部42を筒壁35の開口面より後側に位置させることができる。
【0042】
電装置は、マイナスイオン以外に、プラスイオンやオゾンを生成するために使用でき、必要があればマイナスイオンとプラスイオンとを交互に生成するために使用することができる。本発明の放電装置は、ハンドドライヤー、ヘアブロッサー、足乾燥機等の温風供給機、あるいは扇風機等にも組み込むことができ、クリーンルーム内に適用して集塵機として使用することができる。
【図面の簡単な説明】
【図1】放電装置の縦断面図である。
【図2】ヘアードライヤーの全体の縦断側面図である。
【図3】イオン発生手段の概略を示す説明する概念図である。
【図4】ヘアードライヤーにおけるイオン発生部の縦断面図である。
【図5】整流筒とイオン発生部との関係構造を示す分解斜視図である。
【図6】風導体およびノズルの分解斜視図である。
【図7】図4におけるA−A線断面図である。
【図8】ノズルの使用状態を示す縦断側面図である。
【図9】ノズルの正面図である。
【図10】放電装置の別実施例を示す断面図である。
【図11】中央電極の固定構造の別実施例を示す断面図である。
【図12】放電装置のさらに別の実施例を示す断面図である。
【符号の説明】
1 本体ケース
6 ファン
16 放電装置
23 導風筒
24 導風筒の第1筒部
25 導風筒の第2筒部
29 電極ホルダー
30 中央電極
31 対向電極
32 誘電体部
35 電極ホルダーの筒壁
36 逃げ凹部
38 中央電極支持部
42 中央電極の放電部
45 対向電極の放電縁面
46 誘電筒体
47 リード線
48 シール材
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a discharge device for generating negative ions, positive ions, and ozone, and more particularly to a discharge device of a point discharge type.
[0002]
[Prior art]
As a discharge device for generating negative ions and ozone, for example, a creeping discharge method disclosed in Japanese Patent Application Laid-Open No. H11-60209 and a point discharge method disclosed in Japanese Patent No. 3017146 are known. In the latter, a discharge device is constituted by a cylindrical counter electrode having both ends open, a center electrode arranged outside the opening of the counter electrode, and an electrode mounting member for holding the positions of both electrodes. Japanese Utility Model Registration No. 3061585 discloses a discharge device in which a counter electrode is disposed on an outer surface of a cylindrical dielectric and a plurality of discharge electrodes are disposed on an inner surface of the cylinder.
[0003]
[Problems to be solved by the invention]
As described above, according to the discharge device including the cylindrical counter electrode and the center electrode disposed outside the opening of the counter electrode, the generated ozone and negative ions can be opposed without using an electric fan. It can be fed along the cylindrical axis of the electrode. However, since the center electrode is held on the center axis of the counter electrode by the cantilever arm fixed to the electrode mounting member and the electrode holder fixed to the tip of the arm, the tip of the Are easily shifted from the center axis of the counter electrode. When the distance between the opening edge of the counter electrode and the tip of the center electrode becomes uneven, the electric field is locally concentrated and irregular discharge (spark discharge) is generated. There is a possibility that the dielectric may be melted or deteriorated due to overheating. When the surrounding air is taken in and negative ions are generated, dust taken in with the air adheres to the counter electrode and the dielectric cylinder, and the electric field concentrates on the dust mass accumulated during long-term use, which may cause a spark discharge. .
[0004]
A discharge device that sends out the generated ozone or negative ions only by the self-feeding action of the ozone wind or the ion wind can be used as a dust collector or for applications such as sterilization, decolorization, and deodorization of foods and the like by the generated ozone. Is not a problem, but is not suitable for applications where negative ions reach far away. In a hair dryer incorporating a discharge device, for example, negative ions are blown to the hair together with an air flow generated by a fan.However, when a discharge device that sends out negative ions only by a self-feeding action is applied, the negative ions pass through the supply path. Since it is diffused or depleted thinly in the air flow on the way, the negative ions cannot be effectively fed in a state of high distribution density.
[0005]
An object of the present invention is to always appropriately maintain the relative positional relationship between the center electrode and the counter electrode, thereby eliminating the local concentration of the electric field and the occurrence of irregular discharge, and always effective even during long-term use. Another object of the present invention is to provide a discharge device capable of generating negative ions, ozone, and the like. An object of the present invention is to provide a discharge device that can prevent irregular discharge and tracking phenomenon caused by accumulation and adhesion of dust contained in air. SUMMARY OF THE INVENTION An object of the present invention is to provide a discharge device excellent in durability, which can prevent a dielectric that insulates and shields both electrodes from being deteriorated by ozone and heat. It is an object of the present invention that the generated ions or ozone can be sent far along with the air flow generated by the air blower, and that the ions are diffused or depleted in the air flow in the middle of the feed path. It is an object of the present invention to provide a discharge device suitable for a hot air supply device such as a hair dryer which can prevent the occurrence of ions and can effectively send ions to a distant place with a high distribution density.
[0006]
[Means for Solving the Problems]
As shown in FIGS. 1 and 2, the discharge device of the present invention includes a center electrode 30, a counter electrode 31 surrounding the center electrode 30, and a dielectric portion for insulating and insulating between the center electrode 30 and the counter electrode 31. 32, and an electrode holder 29 formed of an insulating plastic material. On one side of the electrode holder 29, a central electrode support portion 38 and a cylindrical wall 35 are formed. The central electrode 30 fixed to the central electrode support portion 38, the dielectric portion 32, and the counter electrode 31 fixed to the cylindrical wall 35 are arranged concentrically around the central electrode 30.
[0007]
As shown in FIG. 1, the dielectric part 32 can be provided so as to protrude largely forward from the discharge part 42 at the front end of the center electrode 30.
[0008]
The dielectric portion 32 is composed of a dielectric cylinder 46 for insulating and insulating between the center electrode 30 and the counter electrode 31, and a cylinder wall 35 for supporting the counter electrode 31.
[0009]
The dielectric cylinder 46 is formed in a cylindrical shape from an inorganic insulator such as mica, glass, and ceramics. The dielectric cylinder 46 is fixed to the inner surface of the cylinder wall 35.
[0010]
The center electrode 30 and the counter electrode 31 are respectively connected to a power supply lead wire 47 on one side of the electrode holder 29, and a connection portion between the center electrode 30 and the lead wire 47 is provided on the electrode holder 29. It is accommodated in the concave portion 36 and is sealed with the sealing material 48 filling the escape concave portion 36.
[0011]
There is provided ion supply means for forcibly supplying ions or ozone generated by corona discharge between the center electrode 30 and the counter electrode 31 from one side of the electrode holder 29 to the other side. The means include a blower 6 for generating an air flow.
[0012]
The ion supply means includes a blower 6 and a baffle tube 23 that covers the outer surfaces of the dielectric portion 32 and the counter electrode 31. The baffle tube 23 has an open front and rear end, and is generated by the blower 6. The air flow can be forcibly guided to flow from the rear of the dielectric portion 32 and the counter electrode 31 to the front.
[0013]
Further, a central electrode 30 is provided in a discharge space S surrounded by a dielectric portion 32, and a wind guide for introducing and guiding an air flow generated by the blower 6 into the discharge space S as shown in FIG. A passage 56 can be formed.
[0014]
The air guide tube 23 includes a first tube portion 24 surrounding the dielectric portion 32 and the counter electrode 31. An orifice portion R is formed between the dielectric portion 32 and the first cylindrical portion 24.
[0015]
The air guide tube 23 includes a first tube portion 24 surrounding the periphery of the dielectric portion 32 and the counter electrode 31, and a second tube portion 25 continuously projecting forward from the first tube portion 24.
[0016]
Operation and Effect of the Invention
In the discharge device of the present invention, a cylindrical wall 35 and a central electrode support portion 38 are provided on an electrode holder 29 formed of an insulating plastic material, and a central electrode 30 fixed to the central electrode support portion 38, a dielectric portion 32, Since the three counter electrodes 31 fixed to the cylindrical wall 35 are arranged concentrically around the center electrode 30, the structural strength of the discharge device 16 can be improved while minimizing the number of components, and the center electrode can be improved. The positional relationship among the three members 30, the dielectric portion 32, and the counter electrode 31 can be properly determined over a long period of time. Therefore, it is possible to reliably prevent the electric field from being locally concentrated and the irregular discharge from occurring. Since the center electrode 30 is well prevented from displacing even during long-term use, negative ions, ozone, and the like can always be effectively generated. Further, by integrating the electrodes 30 and 31 and the dielectric portion 32 with the electrode holder 29, the discharge device 16 can be handled as one unit component, and the electrodes 30 and 31 are assembled to the electrode holder 29. Can be performed accurately and easily.
[0017]
If the dielectric portion 32 protrudes farther forward than the discharge portion 42 at the front end of the center electrode 30, dust surrounding the discharge portion 42 is covered with the dielectric portion 32, and dust floating in the air adheres to the discharge portion 42. Deposition can be reliably prevented. Therefore, when the discharge device 16 is used for a long period of time, the electric field is prevented from being distorted due to the accumulated dust, and irregular discharge can be prevented, and the reliability can be improved as compared with the conventional discharge device of this kind.
[0018]
When the dielectric portion 32 is composed of the dielectric cylinder 46 and the cylinder wall 35, the central electrode 30 and the counter electrode 31 can be insulated twice by the dielectric cylinder 46 and the cylinder wall 35. Even in the case where the electric field is distorted due to a slight shift in the positional relationship of the position 31, spark and discharge can be reliably prevented and ions and ozone can be effectively generated. The dielectric cylinder 46 covers the periphery of the discharge unit 42, and dust and the like can be prevented from adhering and accumulating on the discharge unit 42. For example, negative ions can be reliably prevented from being attracted to the counter electrode 31 side.
[0019]
When the dielectric cylinder 46 is formed in a cylindrical shape with an inorganic insulator such as mica, glass, ceramics, etc., the dielectric cylinder 46 having excellent heat resistance and ozone resistance can be obtained. By doing so, dielectric breakdown due to deterioration can be eliminated. In particular, since the dielectric cylinder 46 projecting forward is made of an inorganic insulator, even if a tracking phenomenon occurs, the dielectric cylinder 32 is excellent in heat resistance, so that the dielectric portion 32 can be prevented from being damaged.
[0020]
When the connection between the center electrode 30 and the lead wire 47 is accommodated in the escape recess 36 of the electrode holder 29 and the connection is sealed and insulated by the sealing material 48 filled in the escape recess 36, the center electrode 30 and Spark discharge can be prevented from occurring on the side of the connection between the counter electrode 31 and the lead wire 47.
[0021]
According to the discharge device 16 provided with the ion feeding means in which the generated ions or ozone is forcibly fed in one direction by the blowing device 6 for generating an air flow, the self-feeding action of the ion wind or the ozone wind is achieved. As compared with the case where only air is sent out, ions or ozone can be surely sent farther in a state of being put on the air flow, and the distribution density of ions or ozone sent together with the air flow can be improved.
[0022]
According to the ion feeding means constituted by the air guide device 23 and the air blower 6 covering the outer surfaces of the dielectric portion 32 and the counter electrode 31, the generated ions or ozone can be isolated and guided by the air guide tube 23. It is possible to prevent ozone from being widely diffused into the air and to reduce the distribution density, and it is possible to reliably prevent ions from being in contact with the surface of components around the air guide tube 23 and electrically neutralized. The ions and ozone are forced to flow from the rear of the dielectric portion 32 and the counter electrode 31 to the front in a state where the ions and ozone are put on the airflow passing through the air guide tube 23. As compared with, the reach of ions and ozone can be increased. For example, when the discharge device is applied to a hair dryer, ions can be effectively consumed by eliminating negative ions from the air supply route by eliminating the exhaustion of the ions in the air passage or the unnecessary discharge of the ions without contacting the hair. Can be sprayed.
[0023]
According to the discharge device in which the air guide passage 56 is formed in the electrode holder 29 as shown in FIG. 10 and the air flow generated in the blower 6 can be directly introduced and guided into the discharge space S through the wind guide passage 56. Since the ions and ozone floating in the discharge space S can be forcibly discharged to the outside of the discharge space S by being put in the airflow, the ions and ozone floating near the central electrode 30 are applied to the counter electrode 31 or the central electrode 30. Adsorption and neutralization can be reliably prevented from disappearing. In addition, since fresh air containing minute water droplets and the like can be positively introduced, a decrease in the amount of ions can be prevented as much as possible.
[0024]
According to the baffle tube 23 in which the orifice portion R is formed between the dielectric portion 32 and the first cylinder portion 24 with the cylinder end of the dielectric portion 32 facing the first cylinder portion 24, the orifice portion R is formed. The flow velocity of the passing air flow is increased from other parts, and the generated ions and ozone can be sucked into an air flow having a high flow velocity but a low pressure and can be quickly sent to the downstream side. In particular, since the ions floating near the tip of the dielectric cylinder 28 and going to the counter electrode 31 are pushed back by the high flow velocity, the ions can be reliably prevented from being adsorbed to the counter electrode 31 and neutralized and disappeared. Feeding can be performed effectively while the distribution density is high.
[0025]
According to the air guide tube 23 provided with the second tube portion 25 continuously projecting forward from the first tube portion 24, ions and ozone can be transferred and guided even after passing through the orifice portion R. The reach of the flow is further increased.
[0026]
【Example】
1 to 5 show an embodiment in which the discharge device of the present invention is applied to a hair dryer. In FIG. 2, the hair dryer has a horizontally long tubular main body case 1 and a handle 2 provided on one side of the lower surface thereof, and a blower unit, control electric parts and the like are housed inside these. On the front end side of the main body case 1, an air conductor 1A for guiding the flow of air generated by the fan 6 (blower) is mounted. On the front and rear surfaces of the handle 2, there are provided a power switch knob 3 which serves both as an air volume control and a heater switch, and an ion switch knob 4 which turns on and off the power supply to the ion generator. A switch that is operated by the switch knobs 3 and 4 is accommodated inside the handle 2. As shown by the imaginary line, the handle 2 is foldably connected to the main body case 1.
[0027]
The blower unit in the main body case 1 includes a motor case 5, a motor 7 and a fan 6 assembled to the motor case 5, and a heater 9 spirally wound around an insulating frame 8 assembled in a cross shape. The fan 6 is driven to rotate in one direction, pressurizes the air sucked from the suction port 10 at the rear end of the main body case 1, and blows out the air port 11 of the wind conductor 1A at the front end. As will be described later, the fan 6 also serves as a blower for sending out the ions generated by the ion generating means as far as possible from the outlet 11.
[0028]
In order to blow negative ions along with the air flow generated by the fan 6 on the hair, ion generating means is incorporated in the main body case 1. In FIG. 3, the ion generating means includes a rectifier circuit 13 for half-wave rectifying a current from a commercial power supply (100 V), a pulse generating circuit 14 for converting the rectified current into a pulse current, and a pulse current of, for example, 4 kV. It comprises a transformer 15 for boosting the voltage, a discharge device 16, a diode 17 provided between the transformer 15 and the discharge device 16, and the like. The rectifier circuit 13 and the pulse generation circuit 14 are mounted on a circuit board 18, and the circuit board 18 and the step-up transformer 15 are arranged in a space formed by cutting out the insulating frame 8 for the heater 9, and Reference numeral 16 is incorporated in the wind conductor 1A.
[0029]
In FIGS. 4 to 6, a rectifying tube 20 and a blowout grill 21 are incorporated inside the wind conductor 1 </ b> A, and the discharge device 16 is supported by the rectifying tube 20 so that the air flow generated by the fan 6 is substantially reduced. The discharge device 16 is held at the center. The rectifying cylinder 20 has a cylindrical wall having a circular cross section, and is formed of a plastic molded product in which a rectifying wing 22 radially provided at an inner front end thereof and an air guide cylinder 23 provided at the center of the cylindrical wall are integrally formed. After the outlet grill 21 is fitted inside the wind conductor 1A, the rectifying cylinder 20 is fixed inside the wind conductor 1A, so that these three members can be handled as one unit component. The rectifying vanes 22 rectify the swirling airflow generated by the fan 6 into a linear airflow.
[0030]
In FIG. 1, the baffle tube 23 is formed by a tapered first cylindrical portion 24 and a second cylindrical portion 25 that continuously projects forward from a small-diameter end on the front side of the first cylindrical portion 24. In addition, the discharge device 16 is incorporated in the first cylindrical portion 24. The front end of the second cylindrical portion 25 projects outward from the opening surfaces of the outlet grille 21 and the outlet 11 in a state where the front end is located at the center of the outlet 11 of the wind conductor 1A. Reference numeral 26 denotes an inlet on the rear side of the baffle 23, and 27 denotes an outlet on the front side of the baffle 23.
[0031]
In FIG. 1, the discharge device 16 includes an electrode holder 29, a center electrode 30 fixed to a front center portion of the electrode holder 29, a counter electrode 31 surrounding the center electrode 30, and a central electrode 30 and a counter electrode 31. And a dielectric part 32 that insulates and blocks the space between them. The electrode holder 29 has a multi-stage shaft-shaped boss portion 33, a radial holding arm 34 provided on the outer periphery of the boss portion 33, and a cylindrical tube wall 35 for tightly fitting the ring-shaped counter electrode 31. And a central electrode support portion 38 for fixing and supporting the rod-shaped central electrode 30 having a sharp tip from the periphery. As a molding material for the electrode holder 29, an insulating plastic material which is not a conductive plastic can be used. However, in view of the dielectric properties of the cylindrical wall 35, a plastic material having excellent dielectric properties, and having ozone resistance and heat resistance, for example, Polyphenylene sulfide (PPS), polybutylene terephthalate (PBT), polyethylene (PE) and the like are preferable. A cylindrical wall 35 for supporting the counter electrode 31 is formed on the front side of the boss 33, and an escape recess 36 is formed on the rear side. The electrode holder 29 can be positioned and fixed to the rectifying cylinder 20 by fitting and fixing the holding arm 34 into the concave portion 37 provided on the inner surface of the first cylindrical section 24.
[0032]
The center electrode 30 is composed of a discharge needle 40 formed of tungsten having a small discharge resistance and a positioning boss 41 press-fitted and fixed to the rear end of the discharge needle 40. I have. The center electrode 30 is inserted or press-fitted into a mounting hole at the center of the electrode holder 29 (in any case, the discharge needle 40 is in close contact with the mounting hole). In a state in which 40 is positioned on the central axis of the electrode holder 29, it can be fixed firmly. The fixing portion of the discharge needle 40 is a middle portion of a mounting hole formed in the center electrode support portion 38 and a rear end portion of the discharge needle 40 fixed by the boss 41, and a free end side protruding from a front end of the fixing portion ( It is configured to be sufficiently longer than the length of the discharge section 42). Therefore, the effect of preventing the center electrode 30 from wobbling is high, and the three-dimensional positional relationship among the center electrode 30, the dielectric 32, and the counter electrode 31 can be properly determined. In particular, since the middle of the discharge needle 40 is fixedly supported by the central electrode support 38 integrally formed with the cylindrical wall 35 which is the support for the counter electrode 31 also serving as the dielectric, the conventional assembly is achieved. Time error is small, and proper positioning is possible. In FIG. 5, the counter electrode 31 is formed of a press fitting made of a thin plate made of copper or iron, and has a ring-shaped electrode portion 43 having one part of a peripheral surface cut off, and a rearward direction from a rear edge of the electrode portion 43. Four extending mounting legs 44 are integrally provided. The electrode portion 43 is externally fitted to the cylindrical wall 35 having a circular cross section of the electrode holder 29, and the mounting leg 44 is bent and fixed to the peripheral step of the electrode holder 29, so that the electrode portion 43 is fixed to the center electrode 30. It can be fixed in a state of being positioned concentrically. In this mounting state, the front ends of both electrodes 30 and 31 are located on the same plane. Specifically, the discharge portion 42 at the front end of the center electrode 30 and the discharge edge surface 45 at the front end of the counter electrode 31 are located on a plane including the front opening surface of the cylindrical wall 35 and orthogonal to the center axis of the center electrode 30. (See FIG. 1).
[0033]
The dielectric portion 32 includes a dielectric cylinder 46 that insulates and blocks the spark discharge between the center electrode 30 and the counter electrode 31 so as not to occur, and a cylindrical cylinder wall 35 that externally supports the cylindrical counter electrode 31. It is composed of The dielectric cylinder 46 is formed of an inorganic insulating (dielectric) material having high insulation properties and heat resistance, such as mica, glass, and ceramics, and is formed in a cylindrical shape. When mica is used as a material, natural mica is used in the form of powder and molded into a cylindrical shape. As the glass, crystallized glass, quartz glass, borosilicate glass, or the like having excellent heat resistance is preferable. When ceramics are used as the material, a material obtained by firing a powder containing silicate, alumina, zirconia, steatite, barium titanate or the like as a main raw material to form a cylinder is used. If ceramics is used as the dielectric cylinder 46, in addition to an insulation blocking effect of preventing movement of electrons, far infrared rays are radiated when applied to a hot air device such as a dryer, so that an effect of improving hair drying can be expected, and A therapeutic effect on the body can also be expected.
[0034]
The rear end of the dielectric cylinder 46 is fitted and fixed to the inner surface of the cylinder wall 35 to be integrated with the electrode holder 29. In this fixed state, the counter electrode 31 and the dielectric cylinder 46 are centered on the center electrode 30. The front cylinder end of the dielectric cylinder 46 faces the front end portion of the first cylinder 24 and forms an orifice portion R between the dielectric cylinder 46 and the first cylinder 24. ing. In order to prevent irregular discharge from occurring between the center electrode 30 and the counter electrode 31 and to effectively generate negative ions, the dielectric cylinder 46 protrudes largely forward from the discharge portion 42 of the center electrode 30. . As shown in FIG. 1, the center electrode 30 and the transformer 15 and the counter electrode 31 and the transformer 15 are respectively connected by lead wires 47. In order to prevent a spark from being generated between the portions where the lead wires 47 are soldered. The central electrode 30 and the lead wire 47 are housed in the escape recess 36 behind the boss 33 and are sealed with an insulating sealing material 48 filling the recess 36. As a sealing material, an insulating adhesive such as silicon can be used.
[0035]
According to the discharge device 16 having the above configuration, of the high voltage boosted by the transformer 15, only the negative current passing through the diode 17 is applied to the center electrode 30, so that electrons are emitted from the center electrode 30 to the counter electrode 31. It discharges oxygen, minute water droplets, dust and the like in the air to make it negatively charged and negatively ionized. The negative ions generated by the discharge device 16 are blown forward from the outlet 27 through the second tube portion 25 by the airflow introduced into the air guide tube 23. At this time, when the air flow introduced into the air guide tube 23 passes through the orifice portion R having a smaller passage cross-sectional area, the flow velocity increases and the pressure decreases. Therefore, the negative ions and ozone floating around the electrodes 30 and 31 are sucked by the airflow passing through the orifice portion R and quickly sent to the second cylindrical portion 25. Therefore, ions floating near the tip of the dielectric cylinder 28 and going to the counter electrode 31 are prevented from being adsorbed by the counter electrode 31 and neutralized and disappear, thereby forming an ion stream with a high distribution density. it can.
[0036]
Since the negative ions can be supplied to the outlet 11 in a state of being sealed in the air guide tube 23, the negative ions diffuse into the main airflow passing through the wind guide between the discharge device 16 and the outlet 11. In addition, the distribution density can be prevented from lowering, and the negative ions can be reliably prevented from contacting the surface of components such as the case and the blowout grill 21 incorporated in the air guide portion and electrically neutralizing them. Further, since the outlet 27 of the air guide tube 23 is located at the center of the outlet 11 and projects forward from the opening surface of the outlet 11, the negative ions emitted from the outlet 27 of the air guide tube 23 are: The hair can reliably reach the hair while being wrapped in the center of the airflow blown out from the blowout opening 11. A straightening vane 22 is provided immediately before the outlet 11 to prevent the main flow of air blown from the outlet 11 from turning, so that negative ions from the air guide tube 23 diffuse into the main airflow. And the amount of negative ions reaching the hair can be improved.
[0037]
In the hair dryer, as shown in FIG. 8, a cylindrical nozzle 50 may be added to the outlet 11 of the wind conductor 1 </ b> A, as needed, so as to be tapered. An inner cylinder 51 is fixed to the inner surface of the nozzle 50. A leaf-shaped straightening vane 52 (see FIG. 9) is provided on the inner surface of the inner cylinder 50, and a holding boss 53 facing forward and backward is integrally formed at a central portion thereof. A passage tube 54 is fitted inside the holding boss 53, and when the nozzle 50 is attached to the outlet 11 of the wind conductor 1 </ b> A, the passage tube 54 is adjacent to the outlet 27 of the The negative ions coming out of the wind cylinder 23 are guided to move to the center of the opening surface of the outlet 55 of the nozzle 50. As described above, when the negative ions are transferred and guided to the opening surface of the outlet 55 by the passage cylinder 54 provided on the nozzle 50 side, the negative ions are prevented from diffusing into the main airflow passing through the inside of the nozzle, The negative ions can be effectively delivered to the hair in a state where the distribution density is high.
[0038]
FIG. 10 shows another embodiment of the discharge device. In the boss portion 33 of the electrode holder 29, a wind guide passage 56 is formed from the rear end of the boss portion 33 toward the inside of the discharge space S surrounded by the dielectric cylinder 46, and the air flow generated by the fan 6 is passed through the wind guide passage. It can be directly introduced into the discharge space S via 56. In this case, as shown by the imaginary line in FIG. 10, a tapered guide cylinder 57 is provided at the rear of the electrode holder 29 so that a part of the air flow generated by the fan 6 is discharged to the discharge space S. It can be introduced efficiently. As described above, when the air flow generated by the fan 6 is directly introduced into the discharge space S through the wind guide passage 56, ions and ozone floating in the discharge space S are forced out of the discharge space S by being carried on the air flow. And ozone floating near the discharge space S can be prevented from being neutralized and eliminated by being adsorbed to the counter electrode 31 or the center electrode 30.
[0039]
FIG. 11 shows another embodiment of the fixing structure of the center electrode 30. In FIG. 11A, a sealing material in which the central electrode 30 is formed only by the discharge needles 40, the discharge needles 40 are press-fitted into mounting holes provided in the central electrode support portion 38, and the rear end of the needles escapes to fill the concave portions 36. By solidifying at 48, the discharge needles 40 can be firmly fixed as long as they are positioned with respect to the electrode holder 29. Also in this case, similarly to the previous embodiment, the length of the fixed portion of the discharge needle 40 is configured to be sufficiently longer than the length of the free end side (discharge portion 42 side) protruding from the front end of the fixed portion. It is possible to reliably prevent the wobble of 40, and to properly position the three members of the center electrode 30, the dielectric 32, and the counter electrode 31. In addition, since the center electrode support 38 is formed integrally with the cylindrical wall 35, which is a support for the counter electrode 31 also serving as the dielectric, there is little error during assembly, and proper positioning is possible. . In addition, the discharge needle 40 may be insert-molded in the electrode holder. In FIG. 11B, the center electrode 30 is composed of the discharge needle 40 and the positioning boss 41 fixed to the rear end of the discharge needle 40 as in the previous embodiment. The through hole is formed larger than the diameter of the discharge needle 40, and the positioning and the fixing of the center electrode 30 are performed by fitting the positioning boss 41 into the mounting hole.
[0040]
FIG. 12 shows another embodiment of the discharge device. In this case, the air guide tube 23 is formed as a straight tube, the front portion of the dielectric tube 46 is formed to have a tapered cylindrical shape that expands forward, and an orifice portion R is provided between the tip of the dielectric tube 46 and the air guide tube 23. Was formed. As described above, the orifice portion R may be formed between the air guide tube 23 and the dielectric tube 46, and if necessary, another piece may be provided on the inner surface of the air guide tube 23 or the outer surface of the dielectric tube 46. The orifice portion R can be formed by assembling.
[0041]
In addition to the above-described embodiment, the center electrode 30 does not need to be needle-shaped, and may be formed in a thin cylindrical shape. 42 can be formed. The distal end of the discharge unit 42 can be projected forward from the opening surface of the cylindrical wall 35. . During ~ The discharge portion 42 at the front end of the center electrode 30 and the discharge edge surface 45 at the front end of the counter electrode 31 need not necessarily be located on a plane orthogonal to the center axis of the center electrode 30. For example, the discharge part 42 can be located behind the opening surface of the cylindrical wall 35.
[0042]
Release The electric device can be used to generate positive ions and ozone in addition to negative ions, and can be used to generate negative and positive ions alternately if necessary. The discharge device of the present invention can be incorporated in a hot air supply device such as a hand dryer, a hair blower, a foot dryer, or a fan, and can be used in a clean room to be used as a dust collector.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a discharge device.
FIG. 2 is an overall vertical side view of the hair dryer.
FIG. 3 is a conceptual diagram illustrating an outline of an ion generating means.
FIG. 4 is a longitudinal sectional view of an ion generating section in the hair dryer.
FIG. 5 is an exploded perspective view illustrating a relational structure between a rectifying cylinder and an ion generating unit.
FIG. 6 is an exploded perspective view of a wind conductor and a nozzle.
FIG. 7 is a sectional view taken along line AA in FIG.
FIG. 8 is a vertical sectional side view showing a use state of a nozzle.
FIG. 9 is a front view of a nozzle.
FIG. 10 is a sectional view showing another embodiment of the discharge device.
FIG. 11 is a sectional view showing another embodiment of the fixing structure of the center electrode.
FIG. 12 is a sectional view showing still another embodiment of the discharge device.
[Explanation of symbols]
1 Body case
6 fans
16 Discharge device
23 Wind guide tube
24 1st tube part of wind guide tube
25 Second tube part of air guide tube
29 Electrode holder
30 center electrode
31 Counter electrode
32 dielectric part
35 Electrode holder tube wall
36 Escape recess
38 Central electrode support
42 Discharge part of center electrode
45 Discharge edge of counter electrode
46 Dielectric cylinder
47 Lead wire
48 Sealing material

Claims (5)

電極ホルダー29と、電極ホルダー29の前側中央に固定される中央電極30と、中央電極30の周りを囲む円筒状の対向電極31と、中央電極30と対向電極31との間を絶縁遮断する誘電筒体46とを備えており、
電極ホルダー29は、ボス部33と、ボス部33の外周に設けた放射状の保持腕34と、ボス部33の前側に形成されて対向電極31が外嵌支持される円筒状の筒壁35と、中央電極30が位置決め支持される中央電極支持部38とを一体に成形した絶縁性プラスチック成形品であり、
対向電極31は、リング状の電極部43と、電極部43の後縁から後ろ向きに延びる取付脚44とを含み、電極部43を前記筒壁35に外嵌し、取付脚44を電極ホルダー29の周面段部に折り曲げて固定してあり、
誘電筒体46は、雲母、ガラス、セラミックスから選ばれる無機質絶縁素材で円筒状に形成されて、中央電極30の前端の放電部42より前方へ突出するよう、誘電筒体46の後端が筒壁35の内面に嵌め込み固定されており、
中央電極30と、誘電筒体46と、対向電極31とが、中央電極30を中心にして同心円状に配置してあり、
中央電極30と対向電極31との間の高電圧印加による放電で生成したイオンないしオゾンを、電極ホルダー29の後方から前方へ向かって強制的に送給するイオン送給手段を備えており、
イオン送給手段が、空気流を生起する送風装置6を含んでいることを特徴とする放電装置。
An electrode holder 29, a center electrode 30 fixed to the center of the front side of the electrode holder 29, a cylindrical counter electrode 31 surrounding the center electrode 30, and a dielectric for insulating and insulating between the center electrode 30 and the counter electrode 31. and a cylindrical body 46,
The electrode holder 29 includes a boss 33, a radial holding arm 34 provided on the outer periphery of the boss 33, a cylindrical tube wall 35 formed on the front side of the boss 33 and on which the counter electrode 31 is externally fitted and supported. An insulating plastic molded article integrally formed with a central electrode support portion 38 on which the central electrode 30 is positioned and supported;
The counter electrode 31 includes a ring-shaped electrode portion 43 and a mounting leg 44 extending rearward from a rear edge of the electrode portion 43. The electrode portion 43 is fitted to the cylindrical wall 35, and the mounting leg 44 is attached to the electrode holder 29. It is bent and fixed to the peripheral step of
Dielectric cylinder 46, mica, glass, with inorganic insulating material selected from ceramic is formed into a cylindrical shape, so as to output collision than the discharge portion 42 of the front end of the center electrode 30 to the front, the rear end of the dielectric cylinder 46 It is fitted and fixed to the inner surface of the cylindrical wall 35,
The center electrode 30, the dielectric cylinder 46, and the counter electrode 31 are arranged concentrically around the center electrode 30,
Ion supply means for forcibly supplying ions or ozone generated by discharge between the central electrode 30 and the counter electrode 31 by applying a high voltage from the rear to the front of the electrode holder 29;
A discharge device, wherein the ion supply means includes a blower 6 for generating an air flow.
イオン送給手段が、送風装置6と、誘電筒体46および対向電極31の外面を覆う導風筒23とからなり、
導風筒23は、前後端が開口していて、送風装置6で生起した空気流を誘電筒体46および対向電極31の後方から前方へ向かって強制的に流動案内できる請求項1記載の放電装置。
The ion supply means includes the blower 6 and the air guide tube 23 that covers the outer surfaces of the dielectric cylinder 46 and the counter electrode 31,
The discharge according to claim 1, wherein the air guide tube (23) is open at the front and rear ends, and can force the air flow generated by the blower (6) from the rear to the front of the dielectric cylinder (46) and the counter electrode (31). apparatus.
誘電筒体46で囲まれる放電空間S内に、中央電極30が設けられており、
電極ホルダー29に、送風装置6で生起した空気流を放電空間Sへ導入案内する導風通路56が形成してある請求項1記載の放電装置。
A central electrode 30 is provided in the discharge space S surrounded by the dielectric cylinder 46,
2. The discharge device according to claim 1, wherein a wind guide path is formed in the electrode holder to guide the air flow generated by the blower into the discharge space. 3.
導風筒23が、誘電筒体46および対向電極31の周囲を囲む第1筒部24を備えており、
誘電筒体46と第1筒部24との間にオリフィス部Rが形成してある請求項2記載の放電装置。
The wind guide cylinder 23 includes a first cylindrical portion 24 surrounding the dielectric cylinder 46 and the counter electrode 31,
The discharge device according to claim 2, wherein an orifice part (R) is formed between the dielectric cylinder (46) and the first cylinder part (24).
導風筒23が、誘電筒体46および対向電極31の周囲を囲む第1筒部24と、第1筒部24に連続して前方へ突出する第2筒部25とで構成してある請求項4記載の放電装置。The air guide tube (23) comprises a first tube portion (24) surrounding the dielectric tube (46) and the counter electrode (31), and a second tube portion (25) projecting forward from the first tube portion (24). Item 5. The discharge device according to Item 4.
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