JP2018012068A - Electrostatic atomization generator - Google Patents

Electrostatic atomization generator Download PDF

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Publication number
JP2018012068A
JP2018012068A JP2016143136A JP2016143136A JP2018012068A JP 2018012068 A JP2018012068 A JP 2018012068A JP 2016143136 A JP2016143136 A JP 2016143136A JP 2016143136 A JP2016143136 A JP 2016143136A JP 2018012068 A JP2018012068 A JP 2018012068A
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liquid
electrode
flow
electrostatic spray
gas
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JP6637851B2 (en
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利秀 辻
Toshihide Tsuji
利秀 辻
吉田　哲雄
Tetsuo Yoshida
哲雄 吉田
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Hochiki Corp
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Hochiki Corp
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Priority to JP2016143136A priority Critical patent/JP6637851B2/en
Priority to TW106122508A priority patent/TWI634951B/en
Priority to CN201780044316.2A priority patent/CN109475883B/en
Priority to EP17830858.1A priority patent/EP3488936B1/en
Priority to PCT/JP2017/024799 priority patent/WO2018016338A1/en
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Priority to US16/247,889 priority patent/US11059059B2/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/54—Free-cooling systems

Abstract

PROBLEM TO BE SOLVED: To provide an electrostatic atomization generator which charges fine particles with an average particle diameter of several microns or less and can discharge the fine particles.SOLUTION: An electrostatic atomization generator 10 has a liquid nozzle section 20 which discharges a liquid column 38 to a release space and is formed of an insulator material, a liquid conduit section 18 which guides a pressurized liquid to the liquid nozzle section and is formed of the insulator material, a liquid side electrode 16 which is arranged inside of the liquid conduit section and is brought into contact with the liquid, and a gas nozzle section 24 arranged in the periphery of the liquid nozzle portion. The electrostatic atomization generator further includes a gas conduit section 36 which acts a gas flow from the gas nozzle section at an atomization point P of the liquid column discharged to the release space from the liquid nozzle section to atomize the liquid column and produce an atomized flow 40 being a flow of a gas flow containing fine particle and is formed of the insulator material, and an induction electrode 26 which is arranged so as to surround the atomization point positioned in the release space and has such a ring shape that an electrode conductor 28 formed of the conductor material is covered with the insulator material; and applies a predetermined voltage between the electrode on the liquid side and the induction electrode from a power source section 54 to discharge the atomized flow of the charged fine particles.SELECTED DRAWING: Figure 1

Description

本発明は、水、海水、薬液等の液体の微粒子に帯電して放出させる静電噴霧発生装置に関する。   The present invention relates to an electrostatic spray generator that charges and discharges liquid fine particles such as water, seawater, and chemicals.

従来、水等の液体の微粒子を帯電して放出させる静電噴霧発生装置にあっては、噴射ノズルの噴射空間側に配置した誘導電極部と、噴射ノズルの内部に配置されて水系の消火剤に接触する水側電極部とを備え、電源により誘導電極部と水側電極部との間に電圧を加えることにより生じる外部電界を、噴射ノズルにより噴射過程にある水系の消火剤に印加して、噴射粒子を帯電させるようにしている。   Conventionally, in an electrostatic spray generator for discharging fine particles of liquid such as water by charging, an induction electrode portion disposed on the ejection space side of the ejection nozzle and an aqueous fire extinguishing agent disposed inside the ejection nozzle An external electric field generated by applying a voltage between the induction electrode portion and the water electrode portion by a power source to a water-based fire extinguisher in the spraying process. The jetting particles are charged.

このような静電噴霧発生装置によれば、平均粒子径が２０〜２００μｍの微粒子を放出させることができ、例えばウォーターミスト消火設備に使用した場合には、帯電散布ヘッドから散布する水粒子を帯電させることにより、クーロン力により高温燃焼面への水粒子の付着はもとより、燃焼材のあらゆる面への水粒子の付着がおこり、帯電していない通常の水粒子と比較して、濡らし効果が大幅に増大して消火力を高めることができる。   According to such an electrostatic spray generator, fine particles having an average particle diameter of 20 to 200 μm can be discharged. For example, when used in a water mist fire extinguishing facility, the water particles sprayed from the charging spray head are charged. As a result, water particles adhere not only to the high-temperature combustion surface due to Coulomb force, but also to all surfaces of the combustion material, so that the wetting effect is significantly higher than normal water particles that are not charged. To increase the fire extinguishing power.

また、水噴霧冷房設備に使用した場合には、噴霧水に帯電させることにより、クーロン力により人の皮膚に対する付着量が増加し、清涼感を高めることができる。   Moreover, when used for water spray cooling equipment, by charging the spray water, the amount of adhesion to human skin is increased by the Coulomb force, and the refreshing feeling can be enhanced.

特開２００９−１０６４０５号公報JP 2009-106405 A 特開２００９−１０３３３５号公報JP 2009-103335 A

しかしながら、従来の静電噴霧発生装置にあっては、平均粒子径が２０〜２００μｍといった微粒子を帯電して放出させているが、平均粒子径を数ミクロン以下とする用途があり、従来の静電噴霧発生装置では、平均粒子径を数ミクロン以下とする微粒子を帯電して放出することは困難であり、この点が解決課題として残されている。   However, in the conventional electrostatic spray generator, fine particles having an average particle diameter of 20 to 200 μm are charged and released, but there are applications in which the average particle diameter is several microns or less. In the spray generator, it is difficult to charge and release fine particles having an average particle diameter of several microns or less, and this point remains as a problem to be solved.

本発明は、平均粒子径を数ミクロン以下とする微粒子を帯電して放出可能とする静電噴霧発生装置を提供することを目的とする。   An object of the present invention is to provide an electrostatic spray generator that can discharge and discharge fine particles having an average particle diameter of several microns or less.

（静電噴霧発生装置）
本発明は、静電噴霧発生装置に於いて、
液体柱を解放空間に放出する絶縁体材質で作られた液体ノズル部と、
加圧された液体を液体ノズル部に導く絶縁体材質で作られた液体導管部と、
液体導管部の内部に配置されるか、又は、液体導管部の一部分を導体材質とすることで構成される、液体と接触する液体側電極と、
液体ノズル部の周囲に配置される気体ノズル部を有し、液体ノズル部から開放空間に放出される液体柱の所定位置である噴霧化点において、気体ノズル部からの気体流を作用させることにより液体柱を微粒子化して微粒子を含んだ気流の流れである噴霧流を生成する絶縁体材質で作られた気体導管部と、
解放空間に位置する噴霧化点を囲んで配置され、導体材質で作られた電極導体を絶縁体材質により被覆した略リング形状を持つ誘導電極と、
を備え、
電源部から液体側電極と誘導電極間に所定の電圧を与えることで帯電した微粒子の噴霧流を放出させることを特徴とする。 (Electrostatic spray generator)
The present invention relates to an electrostatic spray generator,
A liquid nozzle made of an insulating material that discharges the liquid column into the open space;
A liquid conduit made of an insulating material that guides the pressurized liquid to the liquid nozzle,
A liquid-side electrode in contact with the liquid, which is arranged inside the liquid conduit part or configured by using a part of the liquid conduit part as a conductor material;
By having a gas nozzle portion arranged around the liquid nozzle portion, and by causing a gas flow from the gas nozzle portion to act at a nebulization point that is a predetermined position of the liquid column discharged from the liquid nozzle portion to the open space. A gas conduit made of an insulating material that atomizes a liquid column and generates a spray flow that is a flow of airflow containing fine particles;
An induction electrode having a substantially ring shape, which is disposed around an atomization point located in an open space, and an electrode conductor made of a conductor material is covered with an insulator material;
With
The spray flow of charged fine particles is discharged by applying a predetermined voltage between the liquid side electrode and the induction electrode from the power supply unit.

（誘導電極の配置位置）
誘導電極は、解放空間中であって、リング中心が液体ノズル部の噴霧化点の同軸上の解放空間側に位置すると共にリング部分が円錐状に広がる噴霧流の外側に位置し、更に、気体ノズル部からの気体流の噴出に伴い周囲から外気が流入される隙間を設けて保持される。 (Induction electrode location)
The induction electrode is located in the open space, the ring center is located on the open space side coaxial with the atomization point of the liquid nozzle portion, the ring portion is located outside the spray flow spreading in a conical shape, and further the gas As the gas flow is ejected from the nozzle portion, a gap is provided to allow outside air to flow in from the surroundings.

（液体圧力減衰部）
静電噴霧発生装置は、更に、液体導管部の液体供給側に、供給された液体の圧力を低下させ、かつ、均一な流速に変換させることにより、液体ノズル部から解放空間に放出される液体柱の形成状態と流速を、供給される液体の圧力調整により管理させる液体圧力減衰部が設けられる。 (Liquid pressure attenuation part)
The electrostatic spray generator further reduces the pressure of the supplied liquid to the liquid supply side of the liquid conduit part and converts it to a uniform flow rate, thereby discharging the liquid from the liquid nozzle part into the release space. A liquid pressure attenuating section is provided for managing the column formation state and flow velocity by adjusting the pressure of the supplied liquid.

（オリフィス部とレフレクタ部）
液体圧力減衰部は、供給された液体の流量を絞るオリフィス部と、オリフィス部の流出側に配置されて流体の圧力を低下させ、かつ、均一な流速に変換させるレフレクタ部を備える。 (Orifice and reflector)
The liquid pressure attenuating unit includes an orifice unit that restricts the flow rate of the supplied liquid, and a reflector unit that is arranged on the outflow side of the orifice unit to reduce the pressure of the fluid and convert it to a uniform flow rate.

（電極供給電圧）
電源から液体側電極と誘導電極間に印加する電圧を±０．５ｋＶ〜±２０ｋＶの範囲（＋０．５ｋＶ〜＋２０ｋＶ又は−０．５ｋＶ〜−２０ｋＶの範囲）にする。 (Electrode supply voltage)
The voltage applied between the liquid side electrode and the induction electrode from the power source is set to a range of ± 0.5 kV to ± 20 kV (a range of +0.5 kV to +20 kV or −0.5 kV to −20 kV).

（アースケーブルの非接地）
電源部から誘導電極に電圧印加ケーブルを接続すると共に液体側電極にアースケーブルを接続し、アースケーブルを接地せずに、グランド電位に対しフローティング電位とする。 (Non-grounding of the ground cable)
A voltage application cable is connected from the power supply unit to the induction electrode, and an earth cable is connected to the liquid side electrode. The earth cable is not grounded and is set to a floating potential with respect to the ground potential.

（基本的な効果）
本発明の静電噴霧発生装置によれば、液体柱を解放空間に放出する絶縁体材質で作られた液体ノズル部と、加圧された液体を液体ノズル部に導く絶縁体材質で作られた液体導管部と、液体導管部の内部に配置されるか、又は、液体導管部の一部分を導体材質とすることで構成される、液体と接触する液体側電極と、液体ノズル部の周囲に配置される気体ノズル部を有し、液体ノズル部から開放空間に放出される液体柱の所定位置である噴霧化点において、気体ノズル部からの気体流を作用させることにより液体柱を微粒子化して微粒子を含んだ気流の流れである噴霧流を生成する絶縁体材質で作られた気体導管部と、解放空間に位置する噴霧化点を囲んで配置され、導体材質で作られた電極導体を絶縁体材質により被覆した略リング形状を持つ誘導電極とを備え、電源から液体側電極と誘導電極間に所定の電圧を与えることで帯電した微粒子の噴霧流を放出させるようにしたため、気体ノズル部による気体流を液体ノズル部から放出される液体柱に作用させることで、液体柱を微粒子化して平均粒子径が数ミクロン以下となる微粒子を含んだ気流の流れとなる噴霧流を生成し、液体側電極と誘導電極間に所定の電圧を与えることで噴霧流の微粒子に帯電させて放出させることができ、水、薬液等の液体から平均粒子径が数ミクロン以下となる帯電した微粒子は、クーロン力により適宜の対象物へ効率良く付着し微粒子の付着に伴う例えば消火や冷却といった効果を大幅に増大することができ、噴霧空間における粉じん又は臭気原因物質の吸着量を増大することができる。 (Basic effect)
According to the electrostatic spray generating apparatus of the present invention, the liquid nozzle part made of an insulator material that discharges the liquid column to the open space and the insulator material that guides the pressurized liquid to the liquid nozzle part are made. A liquid conduit part, a liquid side electrode which is arranged inside the liquid conduit part or is made by using a part of the liquid conduit part as a conductor material, and arranged around the liquid nozzle part The liquid column is made into fine particles by causing the gas flow from the gas nozzle part to act at the atomization point which is a predetermined position of the liquid column discharged from the liquid nozzle unit to the open space. A gas conduit made of an insulator material that generates a spray flow that is a flow of air that contains air, and an electrode conductor made of a conductor material that is placed around the atomization point located in the open space and is an insulator It has a substantially ring shape covered with material. An inductive electrode is provided, and a spray flow of charged fine particles is released by applying a predetermined voltage between the liquid side electrode and the inductive electrode from the power source, so that the gas flow by the gas nozzle part is released from the liquid nozzle part. By acting on the liquid column, the liquid column is atomized to generate a spray flow that is a flow of air containing fine particles with an average particle size of several microns or less, and a predetermined voltage is applied between the liquid side electrode and the induction electrode. The sprayed particles can be charged and discharged, and charged particles with an average particle size of several microns or less from liquids such as water and chemicals can be efficiently attached to appropriate objects by Coulomb force. The effects such as fire extinguishing and cooling accompanying the adhesion of fine particles can be greatly increased, and the amount of dust or odor-causing substances adsorbed in the spray space can be increased.

（誘導電極の配置位置による効果）
また、誘導電極は、解放空間中であって、リング中心が液体ノズル部の噴霧化点の同軸上の解放空間側に位置すると共にリング部分が円錐状に広がる噴霧流の外側に位置し、更に、気体ノズル部からの気体流の噴出に伴い周囲から外気が流入される隙間を設けて保持されるようにしたため、この誘導電極の配置によって、生成される帯電した微粒子の比電荷が１．０ｍＣ／Ｋｇ以上となり、この大きな比電荷で数ミクロン以下となる帯電した微粒子を確実に生成できることが確認されている。 (Effects due to the position of the induction electrode)
The induction electrode is located in the open space, the ring center is located on the open space side coaxial with the atomization point of the liquid nozzle portion, and the ring portion is located outside the spray flow spreading conically, In addition, since a gap through which the outside air flows from the surroundings is provided with the gas flow ejected from the gas nozzle part, the specific charge of the charged fine particles generated is 1.0 mC by the arrangement of the induction electrode. It has been confirmed that it is possible to reliably generate charged fine particles that have a large specific charge of several microns or less with a large specific charge.

（液体圧力減衰部による効果）
また、静電噴霧発生装置は、更に、液体導管部の液体供給側に、供給された液体の圧力を低下させ、かつ、均一な流速に変換させることにより、液体ノズル部から解放空間に放出される液体柱の形成状態と流速を、供給される液体の圧力調整により管理させる液体圧力減衰部が設けられ、液体圧力減衰部は、供給された液体の流量を絞るオリフィス部と、オリフィス部の流出側に配置されて流体の圧力を低下させ、かつ、均一な流速に変換させるレフレクタ部を備えるようにしたため、液体ノズル部から安定して連続的に流体柱が放出され、これに気体ノズル部からの気体流を当てて確実に数ミクロン以下の微粒子を生成すると共に帯電させて放出できる。 (Effects of liquid pressure attenuation part)
In addition, the electrostatic spray generator is further released from the liquid nozzle portion to the release space by reducing the pressure of the supplied liquid to the liquid supply side of the liquid conduit portion and converting it to a uniform flow rate. A liquid pressure attenuating part is provided for controlling the formation state and flow velocity of the liquid column by adjusting the pressure of the supplied liquid. The liquid pressure attenuating part includes an orifice part for reducing the flow rate of the supplied liquid, The reflector is arranged on the side to reduce the pressure of the fluid and convert it to a uniform flow velocity, so that the fluid column is stably and continuously discharged from the liquid nozzle, and from this to the gas nozzle It is possible to reliably generate fine particles of several microns or less by applying the gas flow and to discharge them by charging.

また、液体導管部に供給する液体の圧力を調整することで、帯電した微粒子の噴霧量を必要に応じて適宜に調整可能とする。   Further, by adjusting the pressure of the liquid supplied to the liquid conduit portion, the amount of sprayed charged fine particles can be adjusted as necessary.

（電極供給電圧による効果）
また、電源から液体側電極と誘導電極間に印加する電圧を＋０．５ｋＶ〜＋２０ｋＶ又は−０．５ｋＶ〜−２０ｋＶの範囲にすることで、火花放電の発生を防止できる。 (Effects of electrode supply voltage)
Moreover, generation | occurrence | production of a spark discharge can be prevented by making the voltage applied between a liquid side electrode and an induction | guidance | derivation electrode from a power supply into the range of +0.5 kV- + 20 kV or -0.5 kV--20 kV.

（アースケーブルの非接地による効果）
また、電源部から誘導電極に電圧印加ケーブルを接続すると共に液体側電極にアースケーブルを接続し、アースケーブルを接地せずに、グランド電位に対しフローティング電位としたため、電源部から高圧電圧を印加していても、利用者が誘導電極と液体側電極の両方を同時に触れない限り短絡電流が流れることがなく、誘導電極と液体側電極の両方を同時に触れれるような状況はほとんど想定できず、その結果、アースケーブルを接地してグランド電位とした場合に比べ、より高い安全性が確保可能となる。 (Effect of non-grounding the earth cable)
In addition, a voltage application cable is connected from the power supply unit to the induction electrode, and an earth cable is connected to the liquid side electrode. However, unless the user touches both the induction electrode and the liquid side electrode at the same time, no short-circuit current flows, and it is almost impossible to assume a situation where both the induction electrode and the liquid side electrode can be touched at the same time. As a result, it is possible to ensure higher safety as compared to the case where the ground cable is grounded to have a ground potential.

本発明による静電噴霧発生装置の実施形態を断面で示した説明図Explanatory drawing which showed embodiment of the electrostatic spray generator by this invention in the cross section 図１の静電噴霧発生装置を放出側から見て示した平面図The top view which showed the electrostatic spray generator of FIG. 1 seeing from the discharge | release side 図１の静電噴霧発生装置に設けられた液体導管部の気体ノズル部側を取り出して示した説明図Explanatory drawing which took out and showed the gas nozzle part side of the liquid conduit | pipe part provided in the electrostatic spray generator of FIG.

［静電噴霧発生装置の構造］
図１は本発明による静電噴霧発生装置の実施形態を断面で示した説明図、図２は図１の静電噴霧発生装置を放出側から見て示した平面図、 図３は図１の静電噴霧発生装置に設けられた液体導管部の気体ノズル部側を取り出して示した説明図であり、図３（Ａ）にノズル開口側から見た平面を示し、図３（Ｂ）に軸穂方向の断面を示す。 [Structure of electrostatic spray generator]
1 is an explanatory view showing an embodiment of an electrostatic spray generator according to the present invention in cross section, FIG. 2 is a plan view showing the electrostatic spray generator of FIG. 1 as viewed from the discharge side, and FIG. It is explanatory drawing which took out and showed the gas nozzle part side of the liquid conduit | pipe part provided in the electrostatic spray generator, FIG. 3 (A) shows the plane seen from the nozzle opening side, and FIG. 3 (B) shows the axis. A cross section in the panicle direction is shown.

図１に示すように、静電噴霧発生装置１０は、液体供給部材１２、装置本体１４、ノズル部材２２で構成され、液体供給部材１２、装置本体１４、ノズル部材２２は絶縁材質で作られている。液体供給部材１２、装置本体１４、ノズル部材２２の絶縁材質としては、ポリ塩化ビニル樹脂、ポリフェニレンサルファイド樹脂、ウレタン樹脂、ポリテトラフルオロエチレン樹脂、ポリクロロトリフルオロエチレン樹脂、セラミックス（アルミナセラミックス）、ガラス琺瑯の少なくとも１種を絶縁材質に用いて形成されている。   As shown in FIG. 1, the electrostatic spray generating apparatus 10 includes a liquid supply member 12, an apparatus main body 14, and a nozzle member 22, and the liquid supply member 12, the apparatus main body 14, and the nozzle member 22 are made of an insulating material. Yes. Insulating materials of the liquid supply member 12, the apparatus main body 14, and the nozzle member 22 include polyvinyl chloride resin, polyphenylene sulfide resin, urethane resin, polytetrafluoroethylene resin, polychlorotrifluoroethylene resin, ceramics (alumina ceramics), glass It is formed using at least one kind of scissors as an insulating material.

液体供給部材１２の端部には配管取付ねじ部１５ａが形成され、軸方向に液体供給穴１５が形成され、外部のポンプ等で加圧された水や薬剤等の加圧された液体が供給される。液体供給部材１２に供給される液体の圧力は例えば０．１〜１．０ＭＰａの範囲で調整される。   A pipe mounting screw portion 15a is formed at the end of the liquid supply member 12, and a liquid supply hole 15 is formed in the axial direction to supply pressurized liquid such as water or medicine pressurized by an external pump or the like. Is done. The pressure of the liquid supplied to the liquid supply member 12 is adjusted in the range of 0.1 to 1.0 MPa, for example.

液体供給穴１５が連通した内部流路には液体圧力減衰部４６が設けられる。液体圧力減衰部４６には、流入側からストレーナ４８、オリフィス５０及びレフレクタ部５２が配置されている。   A liquid pressure attenuating portion 46 is provided in the internal flow path that communicates with the liquid supply hole 15. In the liquid pressure attenuating portion 46, a strainer 48, an orifice 50, and a reflector portion 52 are arranged from the inflow side.

液体供給部材１２に続いて設けられた装置本体１４の内部には軸方向に流路が形成された液体側電極１６が組み込まれている。液体側電極１６は金属の導電剤材質で作られている。液体側電極１６の導電剤材質は、金属以外に、導電性を有する樹脂、繊維束、ゴムなどを用いて形成されていてもよく、また、これらを組み合わせた複合体を用いて形成されていてもよい。   A liquid-side electrode 16 having a channel formed in the axial direction is incorporated in an apparatus main body 14 provided following the liquid supply member 12. The liquid side electrode 16 is made of a metal conductive material. The conductive agent material of the liquid side electrode 16 may be formed using a conductive resin, fiber bundle, rubber or the like in addition to a metal, or may be formed using a composite that combines these. Also good.

液体側電極１６には装置本体１４の横方向の取付穴に対し防水電極端子４２がねじ込み固定され、防水電極端子４２の先端が電気的に接触固定されている。   A waterproof electrode terminal 42 is screwed and fixed to the lateral mounting hole of the apparatus main body 14 on the liquid side electrode 16, and the tip of the waterproof electrode terminal 42 is electrically contact-fixed.

装置本体１４の先端側は円錐形の絞り部に続いて軸部が形成され、内部の軸方向に液体導管部１８が形成され、液体導管部１８の先端に液体ノズル部２０が開口されている。   On the distal end side of the apparatus main body 14, a shaft portion is formed following the conical throttling portion, a liquid conduit portion 18 is formed in the inner axial direction, and a liquid nozzle portion 20 is opened at the distal end of the liquid conduit portion 18. .

装置本体１４の先端外側に配置されたノズル部材２２は内部に気体導管部３６が形成され、気体導管部３６に対し右側から空気供給管３４が連結固定され、空気供給管３４によりコンプレッサー等から例えば０．６〜０．７ＭＰａ程度に圧縮された空気が供給される。   The nozzle member 22 disposed outside the tip end of the apparatus main body 14 has a gas conduit portion 36 formed therein, and an air supply pipe 34 is connected and fixed to the gas conduit portion 36 from the right side. Air compressed to about 0.6 to 0.7 MPa is supplied.

ノズル部材２２と装置本体１４の先端には気体ノズル部２４が形成されている。気体ノズル部２４は、図３に示す装置本体１４の先端に開口した液体ノズル部２０の外周テーパ面のスパイラル方向に複数本の導気溝部６０が形成されており、導気溝部６０の外側に、図１に示すように、ノズル部材２２の先端のテーパ穴が位置することで、気体ノズル部２４が形成されている。   A gas nozzle portion 24 is formed at the tip of the nozzle member 22 and the apparatus main body 14. In the gas nozzle portion 24, a plurality of air guide groove portions 60 are formed in the spiral direction of the outer peripheral tapered surface of the liquid nozzle portion 20 opened at the tip of the apparatus main body 14 shown in FIG. 3, and outside the air guide groove portion 60. As shown in FIG. 1, the gas nozzle portion 24 is formed by positioning the tapered hole at the tip of the nozzle member 22.

気体ノズル部２４は液体ノズル部２０から放出される液体柱３８に対し、導気溝部６０を介して圧縮された空気をスパイラル状に噴出し、液体ノズル部２０から開放空間に放出される液体柱３８の所定位置である噴霧化点Ｐにおいて、気体ノズル部２４からの気体流を作用させることにより液体柱３８を微粒子化して微粒子を含んだ気流の流れである噴霧流４０を生成させる。   The gas nozzle unit 24 ejects compressed air spirally through the air guide groove 60 to the liquid column 38 discharged from the liquid nozzle unit 20, and the liquid column discharged from the liquid nozzle unit 20 to the open space. At the atomization point P, which is a predetermined position 38, the gas flow from the gas nozzle portion 24 is acted to make the liquid column 38 into fine particles, thereby generating an atomized flow 40 which is a flow of air flow containing fine particles.

液体ノズル部２０及び気体ノズル部２４の先端側の解放空間には誘導電極２６が配置される。誘導電極２６は先端のリング部を解放空間に位置する噴霧化点Ｐを囲んで配置され、導体材質で作られた電極導体２８を絶縁体材質で作られた絶縁被覆３０で覆っており、リング部は図２に示すように、放射状に配置された３本の電極保持アーム３２によりノズル部材２２に対し支持固定されている。   An induction electrode 26 is disposed in the open space on the tip side of the liquid nozzle unit 20 and the gas nozzle unit 24. The induction electrode 26 is disposed so that the ring portion at the tip surrounds the atomization point P located in the open space, and the electrode conductor 28 made of a conductor material is covered with an insulating coating 30 made of an insulator material. As shown in FIG. 2, the portion is supported and fixed to the nozzle member 22 by three electrode holding arms 32 arranged radially.

ここで、誘導電極２６のリング部は、ノズル部材２２の先端側の解放空間中であって、リング中心Ｑが液体柱３８の噴霧化点Ｐの同軸上の解放空間側（外側）に位置すると共に円錐状に広がる噴霧流４０の外側に位置し、更に、気体ノズル部２４からの気体流の噴出に伴い周囲から外気が流入される外気流入空間３５が形成される隙間を設けて保持される。   Here, the ring portion of the induction electrode 26 is in the release space on the tip side of the nozzle member 22, and the ring center Q is located on the release space side (outside) on the same axis as the atomization point P of the liquid column 38. In addition, it is positioned outside the spray flow 40 spreading in a conical shape, and is further provided with a gap in which an outside air inflow space 35 is formed in which outside air flows in from the surroundings as the gas flow is ejected from the gas nozzle portion 24. .

誘導電極２６における電極導体２８は導電性をもつ金属であり、金属以外に、導電性を有する樹脂、繊維束、ゴムなどを用いて形成されていてもよく、また、これらを組み合わせた複合体を用いて形成されていてもよい。   The electrode conductor 28 in the induction electrode 26 is a conductive metal, and may be formed using a conductive resin, fiber bundle, rubber or the like in addition to the metal, and a composite that combines these may be used. It may be formed using.

また、誘導電極２６における絶縁被覆３０の絶縁材質としては、ポリ塩化ビニル樹脂、ポリフェニレンサルファイド樹脂、ウレタン樹脂、ポリテトラフルオロエチレン樹脂、ポリクロロトリフルオロエチレン樹脂、セラミックス（アルミナセラミックス）、ガラス琺瑯の少なくとも１種を絶縁材質に用いて形成されている。   Further, as the insulating material of the insulating coating 30 in the induction electrode 26, at least polyvinyl chloride resin, polyphenylene sulfide resin, urethane resin, polytetrafluoroethylene resin, polychlorotrifluoroethylene resin, ceramics (alumina ceramics), and glass bottles are used. One type is formed using an insulating material.

液体側電極１６と誘導電極２６に対しては電源部５４からの電圧印加ケーブル５６とアースケーブル５８が接続され、液体側電極１６に対するアースケーブル５８は本実施形態では接地されている。電源部５４は、液体側電極１６と誘導電極２６の間に＋０．５ｋＶ〜＋２０ｋＶ又は−０．５ｋＶ〜−２０ｋＶの範囲の直流（交流またはパルス状）の所定の電圧を印加すると、誘導電極２６のリング部の周囲に所定の外部電界が形成され、噴霧化点Ｐで生成された微粒子に帯電させ、帯電された微粒子の噴霧流４０を放出させる。   A voltage application cable 56 and a ground cable 58 from the power supply unit 54 are connected to the liquid side electrode 16 and the induction electrode 26, and the ground cable 58 for the liquid side electrode 16 is grounded in this embodiment. When the power supply unit 54 applies a predetermined direct current (alternating current or pulsed) voltage in the range of +0.5 kV to +20 kV or −0.5 kV to −20 kV between the liquid side electrode 16 and the induction electrode 26, the induction electrode 26. A predetermined external electric field is formed around the ring portion, and the fine particles generated at the atomization point P are charged, and the spray flow 40 of the charged fine particles is discharged.

例えば、誘導電極２６に直流電圧を印加した場合には、誘導電極２６の極性に応じて、正電荷と負電荷のいずれか一方の電荷で帯電した微粒子が生成される。また、交流、パルス状で電圧を印加すると、交互に切り替わる誘導電極２６の極性に応じ、選択的に正電荷あるいは負電荷で帯電した微粒子が生成される。   For example, when a DC voltage is applied to the induction electrode 26, fine particles charged with one of a positive charge and a negative charge are generated according to the polarity of the induction electrode 26. Further, when a voltage is applied in an alternating current or pulse form, fine particles selectively charged with a positive charge or a negative charge are generated according to the polarity of the induction electrode 26 that is alternately switched.

また、電源部５４は誘導電極２６に印加する電圧を、−５ｋＶ〜２０ｋＶの範囲の所定の一定電圧としてもよいし、±５ｋＶ〜±２０ｋＶの範囲で変動させてもよい。そして、このように印加電圧を±５ｋＶ〜±２０ｋＶの範囲にすると、火花放電の発生が防止され、安全を確保しながら帯電した微粒子の噴霧流４０が生成される。   The power supply unit 54 may set the voltage applied to the induction electrode 26 to a predetermined constant voltage in the range of −5 kV to 20 kV or may vary in the range of ± 5 kV to ± 20 kV. When the applied voltage is in the range of ± 5 kV to ± 20 kV in this way, the occurrence of spark discharge is prevented, and a spray flow 40 of charged fine particles is generated while ensuring safety.

［静電噴霧装置の動作］
図１に示す静電噴霧装置１０を使用する場合には、ポンプ等で加圧された液体を配管取付ねじ部１５ａに連結した配管により供給させ、また、空気供給管３４によりコンプレッサ等からの圧縮空気を供給させ、更に、電源部５４により液体側電極１６と誘導電極２６の間に±５ｋＶ〜±２０ｋＶの範囲の所定の電圧を印加させる。 [Operation of electrostatic spraying device]
When the electrostatic spraying device 10 shown in FIG. 1 is used, liquid pressurized by a pump or the like is supplied by a pipe connected to the pipe mounting screw portion 15a, and compressed from a compressor or the like by an air supply pipe 34. Air is supplied, and a predetermined voltage in the range of ± 5 kV to ± 20 kV is applied between the liquid-side electrode 16 and the induction electrode 26 by the power supply unit 54.

液体供給穴１５から供給された加圧液体は、液体圧力減衰部４６のストレーナ４８からオリフィス５２で絞られてレフレクタ部５２に入り、オリフィス５２通る際に減圧され、レフレクタ部５２を通る際に均一な流速に変換され、液体導管部１８を通って先端の液体ノズル部２０に送られ、液体ノズル部２０から解放空間に柱状の形態を保った液体柱３８を放出させる。   The pressurized liquid supplied from the liquid supply hole 15 is squeezed by the orifice 52 from the strainer 48 of the liquid pressure attenuating unit 46 and enters the reflector unit 52. The pressure is reduced when passing through the orifice 52, and uniform when passing through the reflector unit 52. The flow rate is converted to a low flow rate and sent to the liquid nozzle part 20 at the tip through the liquid conduit part 18, and the liquid column 38 having a columnar shape is released from the liquid nozzle part 20 into the release space.

ここで、液体供給穴１５に供給される加圧液体の圧力を調整することで、液体ノズル部２０から放出される液体柱３８の形成状態と流速（放出量）を調整して管理することができる。   Here, by adjusting the pressure of the pressurized liquid supplied to the liquid supply hole 15, the formation state and flow velocity (discharge amount) of the liquid column 38 discharged from the liquid nozzle unit 20 can be adjusted and managed. it can.

空気供給管３４から供給される圧縮空気は気体導管部３６から気体ノズル部２４に送られ、図２及び図３に示したスパイラル配置された導気溝部６０から開放空間に放出され、所定位置となる噴霧化点Ｐで液体ノズル部２０から放出される液体柱３８に当たって作用することで、液体柱３８を微粒子化して平均粒子径が数ミクロン以下の微粒子を含んだ気体の流れである噴霧流４０が生成される。   The compressed air supplied from the air supply pipe 34 is sent to the gas nozzle part 24 from the gas conduit part 36, and is discharged into the open space from the spirally arranged air guide groove part 60 shown in FIGS. By acting on the liquid column 38 discharged from the liquid nozzle unit 20 at the atomization point P, the atomized flow 40 is a gas flow containing a fine particle having an average particle size of several microns or less by atomizing the liquid column 38. Is generated.

噴霧化点Ｐで生成される噴霧流４０の微粒子は、一定電圧が印加された誘導電極２６のリング部にて形成される外部電界により誘導帯電され、帯電した微粒子群の噴霧流４０が放出される。   The fine particles of the spray flow 40 generated at the atomization point P are inductively charged by an external electric field formed at the ring portion of the induction electrode 26 to which a constant voltage is applied, and the spray flow 40 of the charged fine particle group is released. The

このように空気流の作用で液体柱３８を噴霧化させる噴霧化点Ｐと誘導電極２６のリング中心Ｑとの位置関係として、微噴霧化点Ｐの同軸上の解放空間側にリング中心Ｑを位置させたことで、誘導電極２６の誘導電解により帯電された微粒子の比電荷は１．０〜２０ｍＣ／ｋｇとなっており、この大きな比電荷で確実に帯電した微粒子を生成できることが確認されている。   As described above, as a positional relationship between the atomization point P for atomizing the liquid column 38 by the action of the air flow and the ring center Q of the induction electrode 26, the ring center Q is disposed on the coaxial open space side of the fine atomization point P. By being positioned, the specific charge of the fine particles charged by induction electrolysis of the induction electrode 26 is 1.0 to 20 mC / kg, and it is confirmed that the charged fine particles can be reliably generated with this large specific charge. Yes.

［本発明の変形例］
（液体側電極）
上記の実施形態は、液体導管部の内部に導体材質で作られた液体側電極を配置しているが、絶縁体材質で作られた液体導管部の一部分を導体材質とすることで液体側電極を構成しても良い。 [Modification of the present invention]
(Liquid side electrode)
In the above embodiment, the liquid side electrode made of a conductor material is arranged inside the liquid conduit portion. However, the liquid side electrode can be formed by using a part of the liquid conduit portion made of an insulator material as the conductor material. May be configured.

（アースケーブルの非接地）
また、上記の実施形態は、液体側電極に接続するアースケーブルをグランドに接地しているが、アースケーブルをグランドに接地せずに、グランドから浮いたフローティング電位としてもよい。このようにアースケーブルをグランドに接地せずにフローティング電位とすることで、利用者が誘導電極と液体側電極の両方を同時に触れない限り短絡電流が流れることがなく、誘導電極と液体側電極の両方を同時に触れるような状況はほとんど想定できず、その結果、アースケーブルを接地してグランド電位とした場合に比べ、より高い安全性が確保可能となる。 (Non-grounding of the ground cable)
In the above embodiment, the earth cable connected to the liquid side electrode is grounded. However, the earth cable may be a floating potential floating from the ground without grounding the earth cable to the ground. In this way, by setting the grounding cable to the floating potential without grounding, the short-circuit current does not flow unless the user touches both the induction electrode and the liquid side electrode at the same time. A situation where both of them are touched at the same time can hardly be assumed, and as a result, higher safety can be ensured compared to the case where the ground cable is grounded to the ground potential.

（その他）
また本発明はその目的と利点を損なうことのない適宜の変形を含み、更に上記の実施形態に示した数値による限定は受けない。 (Other)
The present invention includes appropriate modifications that do not impair the objects and advantages thereof, and is not limited by the numerical values shown in the above embodiments.

１０：静電噴霧発生装置
１２：液体供給部材
１４：装置本体
１５：液体供給穴
１６：液体側電極
１８：液体導管部
２０：液体ノズル部
２２：ノズル部材
２４：気体ノズル部
２６：誘導電極
２８：電極導体
３０：絶縁被覆
３２：電極保持アーム
３４：空気供給管
３６：気体導管部
３８：液体柱
４０：噴霧流
４２：防水電極端子
４６：液体圧力減衰部
４８：ストレーナ
５０：オリフィス
５２：レフレクタ部
５４：電源部
５６：電圧印加ケーブル
５８：アースケーブル
６０：導気溝部 10: Electrostatic spray generator 12: Liquid supply member 14: Device main body 15: Liquid supply hole 16: Liquid side electrode 18: Liquid conduit part 20: Liquid nozzle part 22: Nozzle member 24: Gas nozzle part 26: Induction electrode 28 : Electrode conductor 30: Insulation coating 32: Electrode holding arm 34: Air supply pipe 36: Gas conduit part 38: Liquid column 40: Spray flow 42: Waterproof electrode terminal 46: Liquid pressure attenuation part 48: Strainer 50: Orifice 52: Reflector Unit 54: Power supply unit 56: Voltage application cable 58: Earth cable 60: Air guide groove

Claims (6)

液体柱を解放空間に放出する絶縁体材質で作られた液体ノズル部と、
加圧された液体を前記液体ノズル部に導く絶縁体材質で作られた液体導管部と、
前記液体導管部の内部に配置されるか、又は、前記液体導管部の一部分を導体材質とすることで構成される、前記液体と接触する液体側電極と、
前記液体ノズル部の周囲に配置される気体ノズル部を有し、前記液体ノズル部から開放空間に放出される液体柱の所定位置である噴霧化点において、前記気体ノズル部からの気体流を作用させることにより前記液体柱を微粒子化して微粒子を含んだ気流の流れである噴霧流を生成する絶縁体材質で作られた気体導管部と、
前記解放空間に位置する前記噴霧化点を囲んで配置され、導体材質で作られた電極導体を絶縁体材質により被覆した略リング形状を持つ誘導電極と、
を備え、
電源から前記液体側電極と前記誘導電極間に所定の電圧を与えることで帯電した微粒子の前記噴霧流を放出させることを特徴とする静電噴霧発生装置。
A liquid nozzle made of an insulating material that discharges the liquid column into the open space;
A liquid conduit portion made of an insulating material that guides pressurized liquid to the liquid nozzle portion;
A liquid-side electrode in contact with the liquid, which is disposed inside the liquid conduit part or configured by using a part of the liquid conduit part as a conductor material;
A gas nozzle portion is disposed around the liquid nozzle portion, and a gas flow from the gas nozzle portion acts at a nebulization point that is a predetermined position of a liquid column discharged from the liquid nozzle portion to an open space. A gas conduit portion made of an insulating material that atomizes the liquid column to generate a spray flow that is a flow of airflow containing fine particles,
An induction electrode having a substantially ring shape, which is disposed around the atomization point located in the open space and in which an electrode conductor made of a conductor material is covered with an insulator material;
With
An electrostatic spray generating apparatus that discharges the spray flow of charged fine particles by applying a predetermined voltage between the liquid side electrode and the induction electrode from a power source.
請求項１記載の静電噴霧発生装置に於いて、
前記誘導電極は、前記解放空間中であって、リング中心が前記液体ノズル部の前記噴霧化点の同軸上の解放空間側に位置すると共にリング部分が円錐状に広がる前記噴霧流の外側に位置し、更に、前記気体ノズル部からの前記気体流の噴出に伴い周囲から外気が流入される隙間を設けて保持されたことを特徴とする静電噴霧発生装置。
In the electrostatic spray generator according to claim 1,
The induction electrode is located in the open space, the ring center being located on the open space side coaxial with the atomization point of the liquid nozzle portion, and the ring portion being located outside the spray flow spreading conically. Further, the electrostatic spray generating device is provided with a gap through which outside air flows in from the surroundings as the gas flow is ejected from the gas nozzle portion.
請求項１記載の静電噴霧発生装置に於いて、更に、前記液体導管部の液体供給側に、供給された液体の圧力を低下させ、かつ、均一な流速に変換させることにより、前記液体ノズル部から解放空間に放出される前記液体柱の形成状態と流速を、前記供給される液体の圧力調整により管理させる液体圧力減衰部が設けられたことを特徴とする静電噴霧発生装置。
2. The electrostatic spray generator according to claim 1, wherein the liquid nozzle further reduces the pressure of the supplied liquid and converts it to a uniform flow velocity on the liquid supply side of the liquid conduit section. An electrostatic spray generating apparatus, comprising: a liquid pressure attenuating unit configured to manage the formation state and flow velocity of the liquid column discharged from the unit to the release space by adjusting the pressure of the supplied liquid.
請求項３記載の静電噴霧発生装置に於いて、前記液体圧力減衰部は、供給された液体の流量を絞るオリフィス部と、前記オリフィス部の流出側に配置されて前記流体の圧力を低下させ、かつ、均一な流速に変換させるレフレクタ部を備えたことを特徴とする静電噴霧発生装置。
4. The electrostatic spray generating device according to claim 3, wherein the liquid pressure attenuating unit is disposed on an outlet for restricting a flow rate of the supplied liquid and on an outlet side of the orifice to reduce the pressure of the fluid. And the electrostatic spray generator characterized by having the reflector part converted into uniform flow velocity.
請求項１記載の静電噴霧発生装置に於いて、前記電源部から前記液体側電極と前記誘導電極間に印加する電圧を＋０．５ｋＶ〜＋２０ｋＶ又は−０．５ｋＶ〜−２０ｋＶの範囲にしたことを特徴とする静電噴霧発生装置。
The electrostatic spray generator according to claim 1, wherein a voltage applied between the liquid side electrode and the induction electrode from the power source is in a range of +0.5 kV to +20 kV or -0.5 kV to -20 kV. An electrostatic spray generator characterized by the above.
請求項１記載の静電噴霧発生装置に於いて、前記電源部から前記誘導電極に電圧印加ケーブルを接続すると共に前記液体側電極にアースケーブルを接続し、前記アースケーブルを接地せずに、グランド電位に対しフローティング電位としたことを特徴とする
静電噴霧発生装置。 2. The electrostatic spray generating device according to claim 1, wherein a voltage application cable is connected from the power supply unit to the induction electrode and an earth cable is connected to the liquid side electrode, and the earth cable is not grounded, and is grounded. An electrostatic spray generator characterized by a floating potential with respect to a potential.
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JP2016143136A JP6637851B2 (en) 2016-07-21 2016-07-21 Electrostatic spray generator
TW106122508A TWI634951B (en) 2016-07-21 2017-07-05 Electrostatic spray generating device and charged water particle dispersing device
EP17830858.1A EP3488936B1 (en) 2016-07-21 2017-07-06 Electrostatic spray generation apparatus and charged aqueous particle spraying apparatus
PCT/JP2017/024799 WO2018016338A1 (en) 2016-07-21 2017-07-06 Electrostatic spray generation apparatus and charged aqueous particle spraying apparatus
CN201780044316.2A CN109475883B (en) 2016-07-21 2017-07-06 Electrostatic spray generating device and charged water particle spraying device
US16/247,889 US11059059B2 (en) 2016-07-21 2019-01-15 Electrostatic atomizing apparatus and electrically-charged water particle spraying apparatus
US17/342,784 US11911785B2 (en) 2016-07-21 2021-06-09 Electrostatic atomizing apparatus and electrically-charged water particle spraying apparatus

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190046908A (en) * 2016-10-18 2019-05-07 차이나 타바코 윈난 인더스트리얼 컴퍼니 리미티드 Compression type charging device
CN112013490A (en) * 2020-09-11 2020-12-01 杨秀波 Air purifier formula fire control unit
CN115382323A (en) * 2022-08-31 2022-11-25 中国矿业大学 Intelligent induction type electrostatic spraying dust settling system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190046908A (en) * 2016-10-18 2019-05-07 차이나 타바코 윈난 인더스트리얼 컴퍼니 리미티드 Compression type charging device
KR102228077B1 (en) 2016-10-18 2021-03-16 차이나 타바코 윈난 인더스트리얼 컴퍼니 리미티드 Compression charging device
CN112013490A (en) * 2020-09-11 2020-12-01 杨秀波 Air purifier formula fire control unit
CN115382323A (en) * 2022-08-31 2022-11-25 中国矿业大学 Intelligent induction type electrostatic spraying dust settling system

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