JP5221942B2 - Electrostatic atomizer and dryer - Google Patents

Electrostatic atomizer and dryer Download PDF

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JP5221942B2
JP5221942B2 JP2007307785A JP2007307785A JP5221942B2 JP 5221942 B2 JP5221942 B2 JP 5221942B2 JP 2007307785 A JP2007307785 A JP 2007307785A JP 2007307785 A JP2007307785 A JP 2007307785A JP 5221942 B2 JP5221942 B2 JP 5221942B2
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conductor
electrode
electrostatic atomizer
counter electrode
peltier element
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JP2009131734A (en
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徹也 小澤
健一 田中
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Maxell Izumi Co Ltd
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Izumi Products Co
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Description

この発明は、電界によって水滴を微細化する静電霧化装置と、これを用いたドライヤーとに関するものである。   The present invention relates to an electrostatic atomizer that refines water droplets by an electric field and a dryer using the electrostatic atomizer.

液体を毛細構造体の先端に毛細管現象により吸い上げ、この液体に静電荷を付与し、この静電荷を持った液滴を毛細構造体先端から対向電極に向かって霧化させ、ナノサイズで強い電荷を持ったミストであるナノイオンを発生させる静電霧化現象が公知である(特許文献1,2)。特許文献1には、液体を入れるカートリッジ(タンク)に毛細構造体の下部を浸漬し、この毛細構造体の上端に液を吸い上げる一方、カートリッジ内に入れた毛細構造体の下端付近に高電圧を付与し、毛細構造体自身を電極(以下放電電極ともいう)とするものが示されている。この場合接地電位にある部屋の壁、天井、床を対向電極としてここに液滴を飛跳させる方法と、環状の対向電極を設ける方法とが記載されている。   The liquid is sucked up at the tip of the capillary structure by capillary action, and an electrostatic charge is imparted to the liquid, and droplets with this electrostatic charge are atomized from the tip of the capillary structure toward the counter electrode, resulting in a strong charge in nano size. An electrostatic atomization phenomenon that generates nano ions, which are mists having a mist, is known (Patent Documents 1 and 2). In Patent Document 1, a lower part of a capillary structure is immersed in a cartridge (tank) for storing liquid, and liquid is sucked up at the upper end of the capillary structure, while a high voltage is applied near the lower end of the capillary structure stored in the cartridge. It is shown that the capillary structure itself is used as an electrode (hereinafter also referred to as a discharge electrode). In this case, there are described a method of causing a droplet to jump here using a wall, ceiling, and floor of a room at ground potential as a counter electrode, and a method of providing an annular counter electrode.

特許文献2には、放電電極となる毛細構造体(水搬送部)に水を供給する水タンクに代えてペルチェ素子を用いることが示されている。すなわちペルチェ素子により冷却される水供給部に空気中の水分(水蒸気)を結露させ、この結露した水を毛細構造体の先端に搬送するものである。なお毛細構造体(放電電極)には高電圧を付与する一方、ペルチェ素子にも電流を供給する必要があるため、ペルチェ素子と毛細構造体との間を電気的に絶縁することを考慮する必要がある。特に毛細構造体には水分が付与されるため、高電圧の毛細構造体の周辺部とペルチェ素子との電気絶縁性を確実に保つため防水性を高める必要がある。   Patent Document 2 discloses that a Peltier element is used instead of a water tank that supplies water to a capillary structure (water transport unit) serving as a discharge electrode. That is, moisture (water vapor) in the air is condensed on the water supply part cooled by the Peltier element, and the condensed water is conveyed to the tip of the capillary structure. In addition, since it is necessary to supply a current to the Peltier element while applying a high voltage to the capillary structure (discharge electrode), it is necessary to consider electrical insulation between the Peltier element and the capillary structure. There is. In particular, since moisture is imparted to the capillary structure, it is necessary to improve waterproofness in order to reliably maintain the electrical insulation between the peripheral portion of the high-voltage capillary structure and the Peltier element.

特許文献3には、このようなペルチェ素子の防水を図り、また熱応力によるペルチェ素子の破損防止のため、ペルチェ素子の周囲をポッティング樹脂で封止することが記載されている。   Patent Document 3 describes that such a Peltier element is waterproofed and the periphery of the Peltier element is sealed with a potting resin in order to prevent damage to the Peltier element due to thermal stress.

特許第3260150号Japanese Patent No. 3260150 特開2005−131549号公報JP 2005-131549 A 特開2007−21371号公報JP 2007-21371 A

特許文献1〜3に示されたものは一方の電極(放電電極)の先端に水滴を毛細管現象により吸い上げるものであるため、この電極の構造を毛細構造体とし、その下端を水滴供給手段(液タンク、ペルチェ素子)につなぐことが必要である。このためこの放電電極の設計自由度や、水滴供給手段の配置自由度が減るという問題があった。   Since those disclosed in Patent Documents 1 to 3 suck water droplets at the tip of one electrode (discharge electrode) by capillary action, the structure of this electrode is a capillary structure, and its lower end is a water droplet supply means (liquid Tank, Peltier element). For this reason, there has been a problem that the degree of freedom of design of the discharge electrode and the degree of freedom of arrangement of the water droplet supply means are reduced.

また特許文献3に示されたポッティング樹脂でペルチェ素子を封止するものでは、ポッティング樹脂の注入圧によりペルチェ素子の給電用配線が短絡したり破断するおそれがあり、ポッティング樹脂の漏出を防ぐために構造が複雑になるという問題があった。さらに高電圧が加わる毛細構造体(放電電極)とペルチェ素子の吸熱面との間に電気絶縁材を挟む必要があり、この電気絶縁材は毛細構造体とペルチェ素子との間の熱伝達を悪くするという問題もある。   Further, in the case where the Peltier element is sealed with the potting resin disclosed in Patent Document 3, there is a possibility that the power supply wiring of the Peltier element may be short-circuited or broken due to the injection pressure of the potting resin, and the structure for preventing leakage of the potting resin There was a problem that became complicated. Furthermore, it is necessary to sandwich an electrical insulating material between the capillary structure (discharge electrode) to which a high voltage is applied and the heat absorbing surface of the Peltier element. This electrical insulating material deteriorates heat transfer between the capillary structure and the Peltier element. There is also the problem of doing.

この発明はこのような事情に鑑みなされたものであり、水滴供給手段に高電圧を印加する必要をなくして、防水処理を簡単にすることができ、水滴供給手段と放電電極との間の電気絶縁処理が不要になり、放電電極の設計自由度や水滴供給手段の配置自由度が大きくなり、効率良く水を霧化させることができる静電霧化装置を提供することを第1の目的とする。またこの静電霧化装置を用いたドライヤーを提供することを第2の目的とする。   The present invention has been made in view of such circumstances, eliminates the need to apply a high voltage to the water droplet supply means, can simplify the waterproofing process, and provides an electrical connection between the water droplet supply means and the discharge electrode. It is a first object to provide an electrostatic atomizer capable of nebulizing water efficiently because insulation treatment is not required, the degree of freedom in design of the discharge electrode and the degree of freedom in arrangement of the water droplet supply means is increased. To do. A second object is to provide a dryer using the electrostatic atomizer.

この発明によれば第1の目的は、高電圧が印加される電極間に形成される電界により水滴を微細化する静電霧化装置であって、各電極から絶縁されかつ一方の電極との間隔が狭い位置に配設された導電体と、この導電体に水滴を供給する水滴供給手段とを備えることを特徴とする静電霧化装置、により達成される。 According to the present invention, a first object is an electrostatic atomizer that refines water droplets by an electric field formed between electrodes to which a high voltage is applied, and is insulated from each electrode and connected to one electrode. This is achieved by an electrostatic atomizer comprising a conductor disposed at a position where the interval is narrow and a water droplet supply means for supplying water droplets to the conductor .

また第2の目的は請求項1〜のいずれかの静電霧化装置を備えたことを特徴とするドライヤー、により達成される。 The second object is achieved by a dryer comprising the electrostatic atomizer according to any one of claims 1 to 9 .

水滴供給手段とこれに近い一方の電極(放電電極)とを別々に分けたので水滴供給手段に高電圧を印加する必要が無くなる。このため放電電極の防水、絶縁処理が簡単になる。また放電電極は毛細構造体とする必要が無いのでその設計自由度が大きくなり、水滴供給手段の配置自由度が大きくなる。水滴供給手段にペルチェ素子を用いる場合にはペルチェ素子を放電電極から絶縁するための処理が不要であり、ペルチェ素子による吸熱作用を有効利用して水滴を効率良く結露させることができる。   Since the water drop supply means and one electrode (discharge electrode) close thereto are separately provided, it is not necessary to apply a high voltage to the water drop supply means. This simplifies waterproofing and insulation treatment of the discharge electrode. In addition, since the discharge electrode does not need to be a capillary structure, the degree of freedom in design increases, and the degree of freedom in arrangement of the water droplet supply means increases. When a Peltier element is used as the water droplet supply means, a process for insulating the Peltier element from the discharge electrode is unnecessary, and the water droplets can be efficiently condensed by effectively utilizing the heat absorbing action of the Peltier element.

両電極の間に導電体を配設し、この導電体に水滴を供給するので設計自由度はさらに増大する。 A conductor disposed between the electrodes, the design flexibility since supplying water droplets to the conductor is further increased.

この発明によれば、例えば次のようにして霧化されかつイオン化されると考えられる。一方の電極(放電電極)に近い位置に配設された導電体に供給される水滴は両電極間に形成される強い電界による誘導電荷により、水滴内の電荷の分布が不均一になり、水滴は両端が両電極に引っ張られる。この時の引っ張り力Fは電荷と電界強度の積に比例し、この力Fが水滴の表面張力より大になることにより水滴は分裂する(レーリー分裂、静電霧化)。従って放電電極と逆極性にイオン化された微細水滴は放電電極に吸着される。一方対向電極に吸引される極性にイオン化された微細水滴は対向電極に向かって飛跳する。この対向電極が環状電極であればこの環状電極を通過して外へ放出される。 According to this invention, it is thought that it is atomized and ionized as follows, for example. Water droplets supplied to a conductor disposed near one electrode (discharge electrode) are non-uniformly distributed in the water droplets due to the induced charges caused by the strong electric field formed between the two electrodes. Both ends are pulled by both electrodes. The pulling force F at this time is proportional to the product of the electric charge and the electric field strength, and when this force F becomes larger than the surface tension of the water droplet, the water droplet is split (Rayleigh splitting, electrostatic atomization). Therefore, fine water droplets ionized in the opposite polarity to the discharge electrode are adsorbed on the discharge electrode. On the other hand, fine water droplets ionized to the polarity attracted by the counter electrode jump toward the counter electrode. If this counter electrode is a ring electrode, it passes through this ring electrode and is emitted to the outside.

両電極間に導電体を介在させたので、導電体とこれに接近した放電電極との間で放電(コロナ放電)が発生し、導電体の他端と対向電極との間に発生する強い電界により、導電体に供給された水滴はレーリー分裂し、微細化される。このため対向電極と逆極性に帯電した(イオン化した)微細水滴が外へ放出される。 Since was interposed a conductor between the electrodes, generated discharge (corona discharge) between the conductor and the discharge electrode in close proximity thereto, a strong electric field generated between the other end and the counter electrode conductor As a result, the water droplets supplied to the conductor are Rayleigh-divided and miniaturized. For this reason, fine water droplets charged (ionized) with a polarity opposite to that of the counter electrode are discharged to the outside .

両電極間に導電体を介在させたので、その一端に近接する針状の放電電極との間の電界強度が大となり放電し易くなる。このため高電圧が導電体の他端と対向電極との間に加わり、この強い電界により水滴は微細化されかつ効率良くイオン化される(請求項)。 Since the conductor is interposed between the electrodes, the electric field strength tends to atmospheric next discharge between the needle-like discharge electrodes close to one end thereof. For this reason, a high voltage is applied between the other end of the conductor and the counter electrode, and the water droplets are refined and ionized efficiently by this strong electric field (claim 2 ).

環状の対向電極は、開口部を形成した導体平板で形成し、導電体を棒状としてその先端付近をこの対向電極の開口部の中央付近に臨ませることができる(請求項)。この場合導電体の長さや配置を変えることにより対向電極の配置を変えることができ、設計自由度が増大する。 Counter electrode of the cyclic forms a conductor flat plate forming the opening, the distal end near a conductor as rod-shaped can face the vicinity of the center of the opening of the counter electrode (claim 3). In this case, the arrangement of the counter electrode can be changed by changing the length and arrangement of the conductor, and the degree of freedom in design increases.

棒状の導電体はその先端以外を針状の放電電極に対向させ、その先端を環状の対向電極の中央付近に臨ませることにより、放電電極先端との間で放電し易くし、対向電極側で水滴の微細化およびイオン化をし易くでき、また各電極および導電体の配置や設計の自由度を増大させることができる(請求項)。この場合に、棒状導電体を放電電極に交叉させ、対向電極となる対向電極を導電体に対して傾斜させることにより同様な効果が得られる(請求項)。 The rod-shaped conductor is opposed to the needle-shaped discharge electrode except for its tip, and the tip faces the vicinity of the center of the annular counter electrode, thereby facilitating discharge between the tip of the discharge electrode and on the counter electrode side. Water droplets can be easily refined and ionized, and the degree of freedom of arrangement and design of each electrode and conductor can be increased (claim 4 ). In this case, to cross the rod-shaped conductor to the discharge electrodes, the same effect can be obtained by tilting the counter electrode serving as a counter electrode with respect to the conductor (claim 5).

また針状の放電電極側から対向電極に向かう空気流を形成するファンを設ければ、対向電極を通過したイオン化した微細水滴を効率良く外へ排出させることができる(請求項)。 Further, if a fan that forms an air flow from the needle-shaped discharge electrode side toward the counter electrode is provided, ionized fine water droplets that have passed through the counter electrode can be efficiently discharged outside (claim 6 ).

水滴供給手段はペルチェ素子で形成することができる。この場合は導電体はこのペルチェ素子の吸熱面に固定された起立棒とし、この起立棒を冷却することによりここに空気中の水蒸気を結露させることができる(請求項)。この起立棒は先端を下向きに配置すれば、ここに結露する水滴を重力により下端(先端)に円滑に流下させ、この下端が臨む環状の対向電極との間で水滴を効率良く微細化しかつイオン化することができる(請求項)。なお起立棒を上向きあるいは横向きに起立させてもよい。この場合は起立棒に結露した水滴は、水滴に作用する引っ張り力Fによって電界強度が大きい先端に運ばれ、ここで静電霧化すると考えられる。 The water droplet supply means can be formed of a Peltier element. In this case the conductor is a standing rod fixed to the heat absorbing surface of the Peltier element, it is possible here to condense water vapor in the air by cooling the upright rod (claim 7). If this upright bar is placed with its tip facing downward, water droplets that condense here will flow smoothly to the lower end (tip) due to gravity, and the water droplets will be efficiently refined and ionized with the annular counter electrode facing this lower end. (Claim 8 ). Note that the upright bar may be erected upward or sideways. In this case, it is considered that the water droplets condensed on the upright rod are carried to the tip having a large electric field strength by the pulling force F acting on the water droplets, and are electrostatically atomized here.

水滴供給手段はペルチェ素子に限らず、他の方法で水滴を供給するものであってもよい。例えば毛細管現象によって水滴を電極間の所定の位置に供給するものが可能である(請求項)。この場合水タンクから毛細構造体により水を吸い上げ、その先端を放電電極に近い所定位置に臨ませる。 The water droplet supply means is not limited to the Peltier element, and may be one that supplies water droplets by other methods. For example, it is possible to supply water droplets to a predetermined position between the electrodes by capillary action (claim 9 ). In this case, water is sucked up from the water tank by the capillary structure, and the tip thereof is made to face a predetermined position close to the discharge electrode.

この発明の静電霧化装置は種々の医療機器や美容機器などに適用できる。例えばドライヤーに適用できる(請求項10)。この場合放電電極を陰極とし対向電極を陽極とすることによりマイナスにイオン化した微細水滴を放出させ、この微細水滴を頭髪に当てて整髪効果を向上させることができる。なお放電電極と対向電極の極性を上記と逆にすればプラスにイオン化した微細水滴を放出させることができ、利用目的に応じて望みの極性にイオン化した微細水滴を使い分ければよい。 The electrostatic atomizer of the present invention can be applied to various medical devices and beauty devices. For example, it can be applied to a dryer (claim 10 ). In this case, by using the discharge electrode as the cathode and the counter electrode as the anode, negatively ionized fine water droplets can be discharged, and the fine hair droplets can be applied to the hair to improve the hair styling effect. Note that if the polarities of the discharge electrode and the counter electrode are reversed, positively ionized fine water droplets can be discharged, and the fine water droplets ionized to the desired polarity may be used depending on the purpose of use.

図1は本発明の一実施例であるドライヤーの平面図、図2は同じく図1におけるII-II線断面図、図3はその静電霧化装置だけを抜き出して示す平面図、図4は同じくIV-IV線断面図、図5は同じく底面図である。また図6は要部を拡大した側断面図、図7は図6におけるVII矢視図である。   1 is a plan view of a dryer according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line II-II in FIG. 1, FIG. 3 is a plan view showing only the electrostatic atomizer, and FIG. Similarly, a sectional view taken along line IV-IV, and FIG. 5 is a bottom view. 6 is a side sectional view showing an enlarged main part, and FIG. 7 is a view taken along arrow VII in FIG.

図1、2に示すようにこのドライヤー2では、略円筒状のハウジング4の下部にグリップ6が折り畳み可能に取付けられ、ハウジング4の後端に外気の主吸入口8が形成され、ハウジング4の前端に加熱した空気の主吐出口10が形成されている。この結果ハウジング4内に主空気通路12が形成される。またハウジング4の上部は上方に膨出し、この膨出部14の内部に後記する静電霧化装置16が収容されている。   As shown in FIGS. 1 and 2, in this dryer 2, a grip 6 is foldably attached to a lower portion of a substantially cylindrical housing 4, and a main inlet 8 for outside air is formed at the rear end of the housing 4. A heated main air discharge port 10 is formed at the front end. As a result, a main air passage 12 is formed in the housing 4. The upper portion of the housing 4 bulges upward, and an electrostatic atomizer 16 (described later) is accommodated in the bulged portion 14.

ハウジング4の内部には、外気を主吸入口8からハウジング4内に吸入する主ファン18、モータ収容部20に収容されこの主ファン18を回転駆動する主モータ(図示せず)、主ファンの下流側にあって空気を加熱するヒータ22などが収容されている。   Inside the housing 4, a main fan 18 that sucks outside air into the housing 4 from the main suction port 8, a main motor (not shown) that is housed in the motor housing portion 20 and rotates and drives the main fan 18, The heater 22 etc. which are in the downstream and heat air are accommodated.

膨出部14の内部にはハウジング4内の主空気通路12と平行な副空気流路24が形成され、その一端(後端)は副吸入口26となり、その他端(前端)は副吐出口28となっている。この副空気通路24内には、外気を副吸入口26から吸入する副ファン30とこの副ファン30を駆動する副モータ33とを一体化したファンユニット34、副ファン30の下流側にあってイオン化した微細水滴(ナノイオン水滴)を発生する静電霧化ユニット36が収容されている。   A sub air flow path 24 parallel to the main air passage 12 in the housing 4 is formed inside the bulging portion 14, one end (rear end) thereof is a sub suction port 26, and the other end (front end) is a sub discharge port. 28. In the auxiliary air passage 24, there is a fan unit 34 in which an auxiliary fan 30 for sucking outside air from the auxiliary inlet 26 and an auxiliary motor 33 for driving the auxiliary fan 30 are integrated, and downstream of the auxiliary fan 30. An electrostatic atomizing unit 36 that generates ionized fine water droplets (nanoionic water droplets) is accommodated.

この実施例は静電霧化装置16はファンユニット34と静電霧化ユニット36とで形成される。静電霧化ユニット36は、副空気通路24の内壁に保持される水平な基板38に組付けられている。この基板38にはファンユニット34寄りに設けた四角の開口40と、これより空気の下流側に設けたペルチェ素子取付座42(図6)が形成されている。開口40には放電電極44を保持するホルダー46が下方から嵌合され固定される。このホルダー46にはクランク状に折曲した針状の放電電極44が固定されている。   In this embodiment, the electrostatic atomizer 16 is formed by a fan unit 34 and an electrostatic atomizer unit 36. The electrostatic atomizing unit 36 is assembled to a horizontal substrate 38 held on the inner wall of the sub air passage 24. A square opening 40 provided near the fan unit 34 and a Peltier element mounting seat 42 (FIG. 6) provided downstream of the air are formed on the substrate 38. A holder 46 for holding the discharge electrode 44 is fitted and fixed to the opening 40 from below. A needle-like discharge electrode 44 bent in a crank shape is fixed to the holder 46.

ホルダー46を基板38に固定した状態で放電電極44は基板38の下面に沿って空気の下流方向に延び、他端が基板38の上面にのびて高圧配線が接続可能になっている。ペルチェ素子取付座42は基板38の上面に起立する複数の立壁48で囲まれ、この取付座42に装着するペルチェ素子50はこれらの立壁48により位置決めされて固定される。このペルチェ素子50は、空気中の水蒸気を結露させて水滴を供給する水滴供給手段となる。   With the holder 46 fixed to the substrate 38, the discharge electrode 44 extends in the downstream direction of the air along the lower surface of the substrate 38, and the other end extends to the upper surface of the substrate 38 so that high voltage wiring can be connected. The Peltier element mounting seat 42 is surrounded by a plurality of standing walls 48 standing on the upper surface of the substrate 38, and the Peltier element 50 mounted on the mounting seat 42 is positioned and fixed by these standing walls 48. The Peltier element 50 serves as a water droplet supply unit that condenses water vapor in the air and supplies water droplets.

なおペルチェ素子50は放熱面となる上面に放熱板52を持ち、吸熱面となる下面中央には金属製の棒状の導電体54が下向きに起立している。この棒状の導電体54は基板38に設けた窓56(図6)を通って下方へ突出している。前記針状の放電電極44の先端はこの導電体54の先端以外の位置、この実施例では図6などに示すように、導電体54の中央付近に水平方向から近接している。   The Peltier element 50 has a heat radiating plate 52 on the upper surface serving as a heat radiating surface, and a metal bar-like conductor 54 stands downward at the center of the lower surface serving as the heat absorbing surface. The rod-shaped conductor 54 protrudes downward through a window 56 (FIG. 6) provided in the substrate 38. The tip of the needle-shaped discharge electrode 44 is close to the position other than the tip of the conductor 54, in this embodiment, near the center of the conductor 54, as shown in FIG.

図6で58は対向電極となる金属製の導体平板であり、導体平板58を基板38の下面に約45°に傾斜して配置し、この導体平板58に設けた円形の開口部60の内周縁を環状としたものである。前記導電体54の下端はこの環状電極の中央付近に上方から下向きに臨んでいる(図6,7参照)。   In FIG. 6, reference numeral 58 denotes a metal conductor flat plate serving as a counter electrode. The conductor flat plate 58 is disposed on the lower surface of the substrate 38 at an angle of about 45 °, and the inside of the circular opening 60 provided in the conductor flat plate 58. The periphery is annular. The lower end of the conductor 54 faces downward near the center of the annular electrode (see FIGS. 6 and 7).

なおこの対向電極58は図6に示すホルダー62に固定され、このホルダー62を基板38の下面に突設した係合爪64(図5)に係合させることにより取付けられる。ここにホルダー62は導体平板58を斜めに保持しかつ空気の流動方向に開き、開口部60を通る空気がこのホルダー62を通過できるようにしている。   The counter electrode 58 is fixed to a holder 62 shown in FIG. 6, and is attached by engaging the holder 62 with an engaging claw 64 (FIG. 5) protruding from the lower surface of the substrate 38. Here, the holder 62 holds the conductor flat plate 58 obliquely and opens in the air flow direction so that air passing through the opening 60 can pass through the holder 62.

図3で66はペルチェ素子50の電源であり、ペルチェ素子50から導出され基板38の上面に固定された電気配線62、62に接続されている。図4で70は高電圧電源であり、陰極を針状の放電電極44に接続し、陽極を対向電極となる導体平板60に接続している。   In FIG. 3, reference numeral 66 denotes a power source for the Peltier element 50, which is connected to electrical wirings 62 and 62 that are led out from the Peltier element 50 and fixed to the upper surface of the substrate 38. In FIG. 4, reference numeral 70 denotes a high-voltage power supply, in which the cathode is connected to the needle-like discharge electrode 44 and the anode is connected to the conductor flat plate 60 serving as the counter electrode.

次にこの実施例の動作を説明する。ハンドル6に設けたスイッチにより電源をオンにすると、主モータと主ヒータ22が作動し、外気が主空気通路12に導入され、ヒータ22で加熱されて主吐出口10から吐出される。また副空気通路24内のファンユニット34の作動により、外気が副空気通路24に流入し、静電霧化ユニット36の基板38の上下面に沿って流れる。基板38の上面に流れる空気はペルチェ素子50の放熱板52を冷却して副吐出口28から外へ流出する。   Next, the operation of this embodiment will be described. When the power is turned on by a switch provided on the handle 6, the main motor and the main heater 22 are activated, and the outside air is introduced into the main air passage 12, heated by the heater 22, and discharged from the main discharge port 10. Also, by the operation of the fan unit 34 in the sub air passage 24, outside air flows into the sub air passage 24 and flows along the upper and lower surfaces of the substrate 38 of the electrostatic atomization unit 36. The air flowing on the upper surface of the substrate 38 cools the heat dissipation plate 52 of the Peltier element 50 and flows out from the sub discharge port 28.

基板38の下面に沿って流れる空気は、放電電極44からペルチェ素子50で冷却された棒状の導電体54、対向電極58の開口部60に流れ、副吐出口28に流れる。外から流入した空気に含まれる水蒸気は、冷却された導電体54に接触して凝結し、表面に結露する。この結露した水(結露水)は重力により下降し、導電体54の下端に向かう。   The air flowing along the lower surface of the substrate 38 flows from the discharge electrode 44 to the rod-shaped conductor 54 cooled by the Peltier element 50 and the opening 60 of the counter electrode 58, and then flows to the sub discharge port 28. The water vapor contained in the air flowing in from the outside is condensed by contacting the cooled conductor 54 and is condensed on the surface. This condensed water (condensed water) descends due to gravity and moves toward the lower end of the conductor 54.

一方放電電極44と対向電極58との間には高電圧が印加されているから、放電電極44の先端と対向電極58との間に設けた狭い間隙に強電界ができる。この電界内にある導電体54には、放電電極44が対向する位置と対向電極58に対向する先端との間に誘導電荷が発生し、狭い間隙で対向する放電電極44と導電体54との間で放電(コロナ放電)が発生する。このため広い間隙をもって対向する導電体54の先端と、対向電極58の開口部60の内周縁との間に強い電界ができる。この電界は導電体56の先端で集中し電界密度(電界強度)が著しく高くなる。   On the other hand, since a high voltage is applied between the discharge electrode 44 and the counter electrode 58, a strong electric field is generated in a narrow gap provided between the tip of the discharge electrode 44 and the counter electrode 58. In the conductor 54 in this electric field, an induced charge is generated between the position where the discharge electrode 44 faces and the tip which faces the counter electrode 58, and the discharge electrode 44 and the conductor 54 facing each other with a narrow gap are generated. Discharge (corona discharge) occurs between them. Therefore, a strong electric field is generated between the tip of the conductor 54 facing with a wide gap and the inner peripheral edge of the opening 60 of the counter electrode 58. This electric field is concentrated at the tip of the conductor 56, and the electric field density (electric field strength) is remarkably increased.

この結果導電体54の下端に存在する水滴が霧化し、マイナスに帯電(イオン化)した微細水滴が対向電極58の開口60に向かって飛跳する。ファンユニット34による風がこのイオン化した微細水滴を副吐出口28から外へ運び、主吐出口10から吐出される温風と共に吐出される。なお分裂した他のプラスに帯電した微細水滴は導電体54の先端に付着して中和し、再び静電霧化する。   As a result, water droplets present at the lower end of the conductor 54 are atomized, and fine water droplets that are negatively charged (ionized) jump toward the opening 60 of the counter electrode 58. The wind generated by the fan unit 34 carries the ionized fine water droplets from the sub discharge port 28 and is discharged together with the warm air discharged from the main discharge port 10. The other positively charged fine water droplets that have been split adhere to the tip of the conductor 54 and are neutralized, and are electrostatically atomized again.

本発明の一実施例であるドライヤーの平面図The top view of the dryer which is one Example of this invention 同じく図1におけるII-II線断面図Similarly, a cross-sectional view taken along line II-II in FIG. 同じくIV-IV線断面図Similarly IV-IV sectional view 同じく背面斜視図Similarly rear perspective view 同じく底面図Similarly bottom view 要部を拡大した側断面図Side sectional view with enlarged main part 図6におけるVII矢視図 VII arrow view in FIG.

16 静電霧化装置
24 副空気通路
34 ファンユニット
36 静電霧化ユニット
38 基板
44 針状放電電極
50 ペルチェ素子(水滴供給手段)
54 導電体
58 対向電極(導体平板)
60 開口部
16 Electrostatic atomizer 24 Secondary air passage
34 fan units
36 Electrostatic atomization unit 38 Substrate
44 needle-shaped discharge electrode 50 Peltier element (water droplet supply means)
54 Conductor
58 counter electrode (conductor flat plate)
60 opening

Claims (10)

高電圧が印加される電極間に形成される電界により水滴を微細化する静電霧化装置であって、
各電極から絶縁されかつ一方の電極との間隔が狭い位置に配設された導電体と、この導電体に水滴を供給する水滴供給手段とを備えることを特徴とする静電霧化装置。
An electrostatic atomizer that refines water droplets by an electric field formed between electrodes to which a high voltage is applied,
An electrostatic atomizer comprising: a conductor insulated from each electrode and disposed at a position where the distance from one electrode is narrow; and water droplet supply means for supplying water droplets to the conductor .
導電体に近い一方の電極は先端が尖った針状の放電電極であり、導電体から遠い他方の電極環状の開口を有する対向電極である請求項の静電霧化装置。 One electrode close to the conductor is a tip pointed needle-like discharge electrodes, distant other electrode a conductor electrostatic atomizer of claim 1 which is a counter electrode having an annular opening. 環状の対向電極は開口部を形成した導体平板で形成され、導電体は略棒状であってその先端付近が対向電極となる導体平板の開口部の中央付近に臨む請求項2の静電霧化装置。 3. The electrostatic atomization according to claim 2 , wherein the annular counter electrode is formed of a conductive flat plate having an opening, and the conductor is substantially rod-shaped, and the vicinity of the tip faces the center of the opening of the conductive flat plate serving as the counter electrode. apparatus. 棒状の導電体はその先端以外が針状の放電電極の先端に対向している請求項3の静電霧化装置。 The electrostatic atomizer according to claim 3 , wherein the rod-like conductor is opposed to the tip of the acicular discharge electrode except for the tip . 棒状の導電体は針状の放電電極に対して交叉するように配設され、対向電極となる導体平板は棒状の導電体に対して傾斜している請求項4の静電霧化装置。 The electrostatic atomizer according to claim 4 , wherein the rod-shaped conductor is disposed so as to cross the needle-shaped discharge electrode, and the conductive flat plate serving as the counter electrode is inclined with respect to the rod-shaped conductor . 放電電極から対向電極に向かう空気流を形成するファンを備える請求項2〜5のいずれかの静電霧化装置。 The electrostatic atomizer in any one of Claims 2-5 provided with the fan which forms the air flow which goes to a counter electrode from a discharge electrode . 水滴供給手段はベルチェ素子で形成され、棒状の導電体がこのペルチェ素子の吸熱面に固定されている請求項1〜6のいずれかの静電霧化装置。 The electrostatic atomizer according to any one of claims 1 to 6, wherein the water droplet supply means is formed of a Bertier element, and a rod-like conductor is fixed to the heat absorbing surface of the Peltier element . ペルチェ素子の棒状の導電体は下向きに起立し、その先端以外が略水平な針状の放電電極に近接し、その先端が傾斜配置された導体平板からなる環状の対向電極の中央付近に臨んでいる請求項7の静電霧化装置。 The rod-shaped conductor of the Peltier element stands downward, the other end of the Peltier element is close to the substantially horizontal needle-like discharge electrode, and the tip of the Peltier element faces the vicinity of the center of the annular counter electrode made of a conductive flat plate that is inclined. The electrostatic atomizer according to claim 7 . 水滴供給手段は毛細管現象によって水滴を供給する請求項1〜6のいずれかの静電霧化装置。 The electrostatic atomizer according to claim 1, wherein the water droplet supply means supplies water droplets by capillary action. 請求項1〜9のいずれかの静電霧化装置を備えたことを特徴とするドライヤー A dryer comprising the electrostatic atomizer according to claim 1 .
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