JP2022147333A

JP2022147333A - Charging apparatus and air cleaner

Info

Publication number: JP2022147333A
Application number: JP2021048529A
Authority: JP
Inventors: 芳浩田中; Yoshihiro Tanaka; 真也内田; Shinya Uchida; 優治巻嶋; Yuuji Makishima
Original assignee: Amano Corp
Current assignee: Amano Corp
Priority date: 2021-03-23
Filing date: 2021-03-23
Publication date: 2022-10-06

Abstract

To charge dust, fine particles, and viruses efficiently, improve charging efficiency, and clean air easily.SOLUTION: A charging apparatus 8 applies voltage to a discharge electrode 35 arranged in a distribution passage of an air flow and generates corona discharge between ground-connected counter electrodes 31 and 32, and itself. The counter electrodes 31 and 32 are disposed so as to block the distribution passage of the air flow, and formed in a flat plate shape having a plurality of openings 45 and 46. The discharge electrodes 35 are a discharge brush 48 bundling a large number of wires, and disposed plurally corresponding to the plurality of openings 45 and 46. The tip part of the discharge electrode 35 is disposed separately from the openings 45 and 46 without penetrating the openings 45 and 46 on the center line of the openings 45 and 46.SELECTED DRAWING: Figure 6

Description

特許法第３０条第２項適用申請有り令和２年８月２４日付にて株式会社イプロスがウェブサイトで公開令和２年９月２９日付にて株式会社日本経済新聞社がウェブサイトで公開令和２年９月３０日付にて株式会社日本経済新聞社が新聞で公開令和２年９月３０日付にてアマノ株式会社の自社ウェブサイトで公開令和２年１０月１４日から令和２年１０月１６日開催の第３回介護＆看護ＥＸＰＯで公開Applied for the application of Article 30, Paragraph 2 of the Patent Law Published on August 24, 2020 by Ipros Co., Ltd. Published on the website by Nikkei Inc. on September 29, 2020 Published in a newspaper by Nikkei Inc. on September 30, 2020 Published on Amano Corporation's own website on September 30, 2020 From October 14, 2020 Released at the 3rd Nursing Care & Nursing EXPO held on October 16, 2020

本発明は、コロナ放電により含塵空気中の塵埃等に荷電を行う荷電装置および該荷電装置を備えた空気清浄機に関する。 TECHNICAL FIELD The present invention relates to a charging device that charges dust and the like in dust-containing air by corona discharge, and an air cleaner provided with the charging device.

従来、家庭用や業務用の空気清浄機や産業用の電気集塵機において、高電圧の印加によって発生するコロナ放電により含塵空気中の微粉塵やミスト等の粒子を帯電させる荷電装置が利用されている。 Conventionally, charging devices that charge particles such as fine dust and mist in dust-containing air by corona discharge generated by the application of high voltage have been used in household and commercial air cleaners and industrial electrostatic precipitators. there is

例えば、特許文献１に開示されているように、第１放電電極と第１対向電極を備えた衝突荷電方式の第１荷電部の下流側に、第２放電電極と第２対向電極を備えた拡散荷電方式の第２荷電部が配置された荷電装置が知られている。 For example, as disclosed in Patent Document 1, a second discharge electrode and a second counter electrode are provided on the downstream side of a collision charging type first charging section including a first discharge electrode and a first counter electrode. A charging device is known in which a diffusion charging type second charging unit is arranged.

また、特許文献２に開示されているように、室内の空気の浄化、殺菌または消臭等を行なう空気清浄機に利用されている放電装置では、例えば、高電圧が印加された放電電極の放電部と誘導電極との間でコロナ放電が発生することにより、電子、イオン、オゾン、ラジカル、活性種など、エネルギー状態の高い粒子が空気から生成され、生成された粒子は、空気清浄機内にて送風される空気によって送風方向に運ばれ、外部に放出されるものが知られている。 In addition, as disclosed in Patent Document 2, in a discharge device used in an air purifier that purifies, sterilizes, or deodorizes indoor air, discharge of a discharge electrode to which a high voltage is applied, for example, By generating a corona discharge between the part and the induction electrode, particles with a high energy state such as electrons, ions, ozone, radicals, and active species are generated from the air, and the generated particles are discharged into the air purifier. It is known that the particles are carried in the blowing direction by the blown air and released to the outside.

また、放電電極としては、特許文献１に記載されている針状の放電電極や、特許文献２に記載されている複数の繊維状の導電体の根元を束ねたブラシ状の放電電極などが知られている。 As the discharge electrode, a needle-like discharge electrode described in Patent Document 1, a brush-like discharge electrode in which a plurality of fibrous conductors are bundled together as described in Patent Document 2, and the like are known. It is

特開２００９－１３１８３０号公報JP 2009-131830 A ＷＯ２０１８／０５５７８４Ａ１WO2018/055784A1

しかしながら、上記した特許文献１に開示された荷電装置では、加工機から発生する微粒子が、吸引条件により高濃度になったり、稼働時間の経過に伴う第１荷電部の荷電性能低下により第１荷電部で十分に帯電させることができなかったりした場合、第２荷電部で確実に帯電させることはできない。具体的には、第２荷電部は第２放電電極から放出されたイオンが空気中に拡散して浮遊している空間を微粒子が通過することで帯電される仕組みであるが、微粒子は、必ずしも放出されたイオンの近傍を通過するとは限らないので、結果的に、すべての微粒子を確実に帯電させることはできない。したがって、荷電部の下流側に配置された集塵部では、帯電されていない粒子を集塵（捕集）することができないため、高濃度の微粒子を吸引する場合等には、集塵効率が低くなり、排気口から微粉塵が漏れてしまうといった問題が発生する。 However, in the charging device disclosed in the above-mentioned Patent Document 1, the concentration of fine particles generated from the processing machine increases depending on the suction conditions, and the charging performance of the first charging unit deteriorates with the lapse of operating time. If the second charging section fails to charge sufficiently, the second charging section cannot reliably charge the second charging section. Specifically, the second charging section is charged by fine particles passing through a space in which ions emitted from the second discharge electrode are dispersed and suspended in the air. As a result, not all microparticles can be reliably charged because they do not always pass near the ejected ions. Therefore, in the dust collecting section arranged downstream of the charging section, uncharged particles cannot be collected (captured). As a result, there arises a problem that fine dust leaks from the exhaust port.

また、上記した特許文献２に開示された荷電装置では、複数の繊維状の導電体の根元を束ねたブラシ状の放電電極を用いてイオンを発生させているが、放電性能の維持のために保護部材で気流を効率よく放電電極の周辺に流通させていないため、空気中の微粒子に対する帯電性能を向上させることができないという問題がある。 In addition, in the charging device disclosed in Patent Document 2, ions are generated using a brush-like discharge electrode in which the roots of a plurality of fibrous conductors are bundled. Since the protective member does not allow the airflow to flow efficiently around the discharge electrode, there is a problem that the charging performance for fine particles in the air cannot be improved.

本発明は、上記した課題を解決すべくなされたものであり、塵埃・微粒子・ウィルスを効率良く荷電して帯電効率を向上させ、空気を容易に清浄化させることのできる荷電装置及び空気清浄機を提供することを目的とするものである。 SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. It is intended to provide

上記した課題を解決するため、本発明の第１の荷電装置は、気流の流通路に配置された放電極に電圧を印加してアース接続された対向電極との間にコロナ放電を発生させる荷電装置において、前記対向電極は、前記気流の流通路を遮るように配置され、複数の開口部を有する平板状に形成され、前記放電極は、多数の線材を束ねた放電ブラシであり、前記複数の開口部に対応して複数配置され、前記放電極の前記放電ブラシの束の中心の先端部は、前記開口部の中心線上において、該開口部を貫通することなく該開口部から離間して配置されていることを特徴とする。 In order to solve the above-described problems, a first charging device of the present invention applies a voltage to a discharge electrode disposed in an air flow passage to generate corona discharge between a counter electrode connected to a ground. In the apparatus, the counter electrode is disposed so as to block the flow path of the airflow and is formed in a flat plate shape having a plurality of openings, the discharge electrode is a discharge brush in which a large number of wires are bundled, and the plurality of and the center tip of the bundle of the discharge brushes of the discharge electrode is spaced apart from the opening on the center line of the opening without penetrating the opening. It is characterized by being arranged.

本発明の第２の荷電装置では、前記対向電極は、前記放電極を挟んで前記気流の流通方向の上流側及び下流側にそれぞれ配置され、前記放電極は、前記気流の流通方向の上流側を向いた上流側放電極と下流側を向いた下流側放電極とを備えることを特徴とする。 In the second charging device of the present invention, the counter electrodes are arranged on the upstream side and the downstream side in the direction of circulation of the air current, respectively, with the discharge electrode interposed therebetween, and the discharge electrode is arranged on the upstream side in the direction of circulation of the air current. and a downstream discharge electrode facing downstream.

本発明の第３の荷電装置では、前記上流側放電極と前記下流側放電極は、前記上流側及び下流側の対向電極の前記開口部にそれぞれ対応して複数設けられていることを特徴とする。 In the third charging device of the present invention, a plurality of the upstream discharge electrodes and the downstream discharge electrodes are provided corresponding to the openings of the upstream and downstream counter electrodes, respectively. do.

本発明の第４の荷電装置では、前記上流側及び下流側の対向電極の前記開口部は、それぞれ同数ずつ設けられ、且つそれぞれ同一の開口面積を有していることを特徴とする。 The fourth charging device of the present invention is characterized in that the openings of the upstream and downstream counter electrodes are provided in the same number and have the same opening area.

本発明の第５の荷電装置では、前記放電ブラシを保持する複数の保持部が形成された複数の支持部材を備え、該支持部材は前記流通路内に等間隔で並設されていることを特徴とする。 In the fifth charging device of the present invention, a plurality of support members having a plurality of holding portions for holding the discharge brush are provided, and the support members are arranged in parallel at equal intervals in the flow path. Characterized by

本発明の第６の荷電装置では、前記支持部材は、金属製の長尺板状の導体であり、前記保持部が一体に形成されていることを特徴とする。 A sixth charging device of the present invention is characterized in that the support member is a long metal plate-shaped conductor, and the holding portion is integrally formed.

本発明の第７の荷電装置では、予め金属箔帯状態に一定間隔でブラシが取り付けられたブラシユニットが前記支持部材に接合され、前記放電ブラシの根元は前記保持部にカシメられて保持されていることを特徴とする。 In the seventh charging device of the present invention, a brush unit in which brushes are attached in advance in a metal foil band state at regular intervals is joined to the support member, and the base of the discharge brush is crimped and held by the holding portion. It is characterized by

本発明の第８の荷電装置では、前記支持部材は、プラスチック製の長尺体であり、予め金属箔帯状体に一定間隔でブラシが取り付けられたブラシユニットと、前記放電ブラシの根元を保持する保持部と、がインサート成型で一体的に形成されていることを特徴とする。 In the eighth charging device of the present invention, the support member is an elongated body made of plastic, and holds a brush unit in which brushes are attached in advance to a metal foil strip at regular intervals, and the roots of the discharge brushes. The holding portion and and are integrally formed by insert molding.

本発明の第９の荷電装置では、前記支持部材は、長手方向に直交する方向の形状が、該支持部材の周囲を流通する気流に渦流及び／又は乱流を発生させる流動性形状を有していることを特徴とする。 In the ninth charging device of the present invention, the support member has a flowable shape in which the shape in the direction perpendicular to the longitudinal direction generates vortex and/or turbulence in the airflow flowing around the support member. It is characterized by

本発明の第１０の荷電装置では、前記支持部材は、二酸化チタンを含有しており、光触媒による抗菌・防汚機能を有することを特徴とする。 A tenth charging device of the present invention is characterized in that the support member contains titanium dioxide and has an antibacterial and antifouling function due to a photocatalyst.

本発明の空気清浄機は、上記した荷電装置を備えた空気清浄機において、吸気口と、排気口と、送風手段と、前記荷電装置の下流側に配置される集塵装置と、を備え、前記送風手段によって前記吸気口から吸い込まれた空気中に含まれる塵埃・微粒子・ウィルスを、前記荷電装置が荷電した後に前記集塵装置が吸着し、前記排気口から清浄空気が排出されることを特徴とする。 An air cleaner according to the present invention is an air cleaner comprising the charging device described above, comprising an intake port, an exhaust port, a blower, and a dust collector arranged downstream of the charging device, The dust, fine particles, and viruses contained in the air sucked from the intake port by the air blowing means are charged by the charging device, and then the dust collecting device adsorbs them, and clean air is discharged from the exhaust port. Characterized by

本発明によれば、、塵埃・微粒子・ウィルスを効率よく荷電して帯電効率を向上させ、空気を容易に清浄化させることができる等、種々の優れた効果を得ることができる。 According to the present invention, it is possible to obtain various excellent effects, such as being able to efficiently charge dust, fine particles, and viruses, improve the charging efficiency, and easily purify the air.

本発明の実施形態に係る空気清浄機の全体構成を示す斜視図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows the whole structure of the air cleaner which concerns on embodiment of this invention. 本発明の実施形態に係る空気清浄機の全体構成を示すブロック図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the whole air cleaner structure which concerns on embodiment of this invention. 本発明の実施形態に係る荷電装置を示す斜視図である。1 is a perspective view showing a charging device according to an embodiment of the invention; FIG. 本発明の実施形態に係る荷電装置を示す斜視図である。1 is a perspective view showing a charging device according to an embodiment of the invention; FIG. 本発明の実施形態に係る荷電装置を部分的に拡大して示す斜視図である。1 is a partially enlarged perspective view of a charging device according to an embodiment of the present invention; FIG. 本発明の実施形態に係る荷電装置を部分的に拡大して示す平断面図である。1 is a plan sectional view showing a partially enlarged charging device according to an embodiment of the present invention; FIG. 図６のＡ矢視図である。FIG. 7 is a view in the direction of arrow A in FIG. 6; 本発明の実施形態に係る荷電装置における放電極部材の製造工程を示す説明図である。FIG. 4 is an explanatory diagram showing a manufacturing process of the discharge electrode member in the charging device according to the embodiment of the present invention; 本発明の実施形態に係る荷電装置における第２の実施例の放電極部材の製造工程を示す説明図である。FIG. 8 is an explanatory diagram showing a manufacturing process of the discharge electrode member of the second example in the charging device according to the embodiment of the present invention; 本発明の実施形態に係る荷電装置における第３の実施例の放電極部材の製造工程を示す説明図である。FIG. 10 is an explanatory view showing a manufacturing process of the discharge electrode member of the third example in the charging device according to the embodiment of the present invention; 本発明の他の実施形態に係る荷電装置を部分的に拡大して示す平断面図である。FIG. 6 is a plan sectional view showing a partially enlarged charging device according to another embodiment of the present invention; 図１１のＢ矢視図である。11. It is a B arrow directional view of FIG. 本発明の他の実施形態に係る荷電装置における放電極部材の変形例を示す平面図である。FIG. 5 is a plan view showing a modification of a discharge electrode member in a charging device according to another embodiment of the present invention;

以下、図面を参照しつつ、本発明の実施形態について説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

先ず、図１及び図２を参照しつつ、本発明の実施形態に係る空気清浄機について説明する。ここで、図１は本実施形態に係る空気清浄機の全体構成を気流の上流側から示す斜視図、図２は本実施形態に係る空気清浄機の全体構成を示すブロック図である。 First, an air cleaner according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. Here, FIG. 1 is a perspective view showing the overall configuration of the air cleaner according to this embodiment from the upstream side of the airflow, and FIG. 2 is a block diagram showing the overall configuration of the air cleaner according to this embodiment.

図１に示されているように、本実施形態に係る空気清浄機は、略直方体形状の筐体１を備えており、筐体１の左側（図１の左手前側）に吸気室２が設けられ、筐体１の右側（図１の右奥側）に排気室３が設けられている。吸気室２は、扁平な箱状に形成され、その正面側（図１の右手前側）と背面（図１の左奥側）と上面にそれぞれ吸気口４が開口されている。排気室３は、下方が面取りされた傾斜面を有する箱状に形成され、その上面に排気口５が開口されている。また、筐体１の正面には開閉扉を兼ねる高圧電源部２３が開閉可能に取り付けられている。なお、図１では、空気清浄機の内部の状態が視認できるように、便宜上、筐体１等を二点鎖線で示している。 As shown in FIG. 1, the air purifier according to this embodiment includes a substantially rectangular parallelepiped housing 1, and an air intake chamber 2 is provided on the left side of the housing 1 (left front side in FIG. 1). An exhaust chamber 3 is provided on the right side of the housing 1 (on the far right side in FIG. 1). The air intake chamber 2 is formed in a flat box shape, and air intake ports 4 are opened in the front side (the right front side in FIG. 1), the rear side (the left rear side in FIG. 1), and the upper surface, respectively. The exhaust chamber 3 is formed in a box shape having an inclined surface with a chamfered bottom, and an exhaust port 5 is opened in the upper surface thereof. A high-voltage power supply unit 23 that also serves as an opening/closing door is attached to the front surface of the housing 1 so as to be able to be opened and closed. In addition, in FIG. 1, the housing 1 and the like are indicated by two-dot chain lines for the sake of convenience so that the state inside the air cleaner can be visually recognized.

筐体１の内部には、プレフィルタ７と、荷電装置８と、集塵装置９と、消臭ユニット１０と、吸引ファン１１と、が含塵空気の流通方向（図１中の矢印方向）に沿って順に直列に配置されている。 Inside the housing 1, a pre-filter 7, a charging device 8, a dust collector 9, a deodorizing unit 10, and a suction fan 11 are arranged in the direction of flow of dust-containing air (the arrow direction in FIG. 1). are arranged in series along the

プレフィルタ７は、略四角形状の粗取りフィルタ（図示省略）であり、消臭ユニット１０は、含塵空気の流通方向に沿って多数の微細な空気流通孔を有するハニカム状の基材の表面に、臭気成分を吸着するゼオライトなどの吸着剤の微粉末が担持された略四角形状のフィルタである。集塵装置９は、集塵用の直流高圧電源が接続された電極板とアース接続された接地板とが等間隔で交互に配置されたものであるが、簡易的には、帯電フィルタを備えた集塵装置であってもよい。なお、荷電装置８の詳細については後述する。 The pre-filter 7 is a roughly rectangular rough filter (not shown), and the deodorizing unit 10 has a surface of a honeycomb-shaped base material having a large number of fine air circulation holes along the direction of circulation of the dust-containing air. It is a substantially rectangular filter carrying fine powder of an adsorbent such as zeolite that adsorbs odorous components. The dust collector 9 has electrode plates connected to a DC high voltage power supply for collecting dust and ground plates connected to the ground alternately arranged at regular intervals. It may be a dust collector. Details of the charging device 8 will be described later.

図２に示されているように、本実施形態の空気清浄機は、メモリ１２とＣＰＵ１３を有する制御部に各装置がインターフェイス１４を介して接続され、該各装置はＣＰＵ１３の制御により動作する。表示部１５は操作状態を表示し、操作部１６は入力キー等を有し、ＵＶ照射部１７は筐体1内部に備えたＵＶランプ２４（図１参照）を照射する。 As shown in FIG. 2, in the air cleaner of this embodiment, each device is connected via an interface 14 to a control unit having a memory 12 and a CPU 13, and each device operates under the control of the CPU 13. FIG. A display unit 15 displays an operation state, an operation unit 16 has input keys and the like, and a UV irradiation unit 17 irradiates a UV lamp 24 (see FIG. 1) provided inside the housing 1 .

検知部１８は、扉の開状態を検知して高電圧やファンモータの動作を切るための安全装置等として機能する。ソレノイド駆動部１９は非稼働時に吸気および排気流路を遮蔽するシャッター２０を駆動する。モータ駆動部２１はファンモータ２２を制御する。高圧電源部２３は、交流の元電源を高圧トランスで昇圧した後、倍圧部で交流電流を直流に変換すると共にさらに昇圧して数ＫＶの高電圧を生成できるように構成されている。また、高圧電源部２３は、荷電装置８及び集塵装置９に印加する高電圧の出力を制御するための出力制御部としても機能する。 The detector 18 functions as a safety device or the like for detecting the open state of the door and cutting off the operation of the high voltage and the fan motor. A solenoid drive unit 19 drives a shutter 20 that shields the intake and exhaust passages when not in operation. A motor drive unit 21 controls a fan motor 22 . The high-voltage power supply unit 23 is configured so as to generate a high voltage of several kilovolts by boosting an AC source power supply by a high-voltage transformer, converting the alternating current into a direct current by a voltage doubler, and further boosting the voltage. The high-voltage power supply section 23 also functions as an output control section for controlling the output of the high voltage applied to the charging device 8 and the dust collector 9 .

次に、図３～図８を参照しつつ、本発明の実施形態に係る空気清浄機の荷電装置８について詳細に説明する。ここで、図３は荷電装置８を気流の上流側から示す斜視図、図４は荷電装置８を気流の下流側から示す斜視図、図５は荷電装置８を部分的に拡大して示す斜視図、図６は荷電装置８を部分的に拡大して示す平断面図、図７は図６のＡ矢視図、図８は荷電装置８の放電極部材の製造工程を示す説明図である。 Next, the charging device 8 of the air cleaner according to the embodiment of the present invention will be described in detail with reference to FIGS. 3 to 8. FIG. 3 is a perspective view showing the charging device 8 from the upstream side of the airflow, FIG. 4 is a perspective view showing the charging device 8 from the downstream side of the airflow, and FIG. 5 is a perspective view showing the charging device 8 partially enlarged. 6 is a plan sectional view showing a partially enlarged charge device 8, FIG. 7 is a view from the arrow A in FIG. 6, and FIG. .

荷電装置８は、含塵空気の流通方向から見て略四角形状の枠体３０と、枠体３０の内部において含塵空気の流通方向上流側に配置される対向電極としての上流側接地電極板３１と、枠体３０の内部において上流側接地電極板３１より含塵空気の流通方向の下流側で上流側接地電極板３１に平行に配置される対向電極としての下流側接地電極板３２と、上流側接地電極板３１と下流側接地電極板３２との間に配置される放電極部材３３と、を備えている。上流側接地電極板３１及び下流側接地電極板３２はアース接続されている。放電極部材３３は、支持部材としての支持基板３４と、支持基板３４に保持される放電極３５と、を備えて構成されている。 The charging device 8 includes a substantially rectangular frame 30 when viewed from the direction of circulation of the dust-containing air, and an upstream ground electrode plate serving as a counter electrode disposed upstream in the direction of circulation of the dust-containing air inside the frame 30. 31, a downstream ground electrode plate 32 as a counter electrode arranged parallel to the upstream ground electrode plate 31 on the downstream side of the upstream ground electrode plate 31 in the flow direction of dust-containing air inside the frame 30; and a discharge electrode member 33 arranged between the upstream ground electrode plate 31 and the downstream ground electrode plate 32 . The upstream ground electrode plate 31 and the downstream ground electrode plate 32 are grounded. The discharge electrode member 33 includes a support substrate 34 as a support member and a discharge electrode 35 held by the support substrate 34 .

枠体３０は、互いに対向するように立設される左右の支柱３６，３７と、各支柱３６，３７の上端部間に渡設される上連結部材３８と、各支柱３６，３７の下端部間に渡設される下連結部材３９と、を備えて構成されている。左右の支柱３６，３７の各上端部には、上連結部材３８の下方に上取付部材４０が絶縁碍子４１を介して横架され、左右の支柱３６，３７の各下端部には、下取付部材４２が絶縁碍子４３を介して横架されている。これにより、上取付部材４０及び下取付部材４２は枠体３０に絶縁された状態で支持される。 The frame body 30 includes left and right struts 36 and 37 erected to face each other, an upper connecting member 38 bridging between upper ends of the struts 36 and 37, and lower ends of the struts 36 and 37. and a lower connecting member 39 provided between them. An upper mounting member 40 is horizontally mounted below the upper connecting member 38 at the upper end of each of the left and right struts 36 and 37 via an insulator 41. A member 42 is horizontally suspended via an insulator 43 . As a result, the upper mounting member 40 and the lower mounting member 42 are supported by the frame 30 in an insulated state.

下取付部材４２には、所定間隔で複数の切欠部（図示省略）が上下スリット状に形成されている。また、上取付部材４０の右端部には給電部材４４が取り付けられており、給電部材４４に高圧電源部２３が接続される。高圧電源部２３より供給される数ｋＶの高電圧は、給電部材４４、上取付部材４０、支持基板３４、放電極３５に印加されて、後述する図６に示すように、放電極３５の先端部（ブラシ先端部）と開口部４５，４６との間にコロナ放電による略円錐形状の帯電エリアＥＡ１，ＥＡ２を形成する。なお、空気中の塵埃の濃度や各部材の構成にもよるが、供給される高電圧は好適には５ｋＶ程度が良い。 A plurality of notches (not shown) are formed in the shape of upper and lower slits in the lower mounting member 42 at predetermined intervals. A power supply member 44 is attached to the right end portion of the upper mounting member 40 , and the high voltage power supply section 23 is connected to the power supply member 44 . A high voltage of several kV supplied from the high-voltage power supply unit 23 is applied to the power supply member 44, the upper mounting member 40, the support substrate 34, and the discharge electrode 35, and as shown in FIG. Approximately conical charging areas EA1 and EA2 are formed by corona discharge between the portion (brush tip portion) and the openings 45 and 46. As shown in FIG. Although it depends on the concentration of dust in the air and the structure of each member, the high voltage to be supplied is preferably about 5 kV.

上流側接地電極板３１は、図３に良く示されているように、丸孔形状の上流側開口部４５が多数形成された１枚の四角形状の導電性を有する金属（本実施形態では、ステンレス）により平板状に形成されており、含塵空気の流通を遮る向き（含塵空気の流通方向に対して直交する向き）で枠体３０に取付けられている。上流側開口部４５は、上下に複数個連設されると共に複数列に亘って（本実施形態では、１４個×１４列＝１９６個）形成されており、左右に隣接する列間で上流側開口部４５の半個分上下に互い違いにずれるように千鳥状に一定間隔で配列されている。 As best shown in FIG. 3, the upstream ground electrode plate 31 is made of a sheet of rectangular conductive metal (in this embodiment, the It is formed in a flat plate shape from stainless steel) and attached to the frame 30 in a direction that blocks the flow of dust-containing air (a direction perpendicular to the flow direction of the dust-containing air). A plurality of upstream openings 45 are provided continuously in the vertical direction and are formed over a plurality of rows (14×14 rows=196 in this embodiment). They are arranged in a staggered manner at regular intervals so as to alternately shift up and down by half of the openings 45 .

下流側接地電極板３２は、図４に良く示されているように、丸孔形状の下流側開口部４６が多数形成された１枚の四角形状の導電性を有する金属（本実施形態では、ステンレス）により平板状に形成されており、含塵空気の流通を遮る向き（含塵空気の流通方向に対して直交する向き）で枠体３０に取付けられている。下流側接地電極板３２の下流側開口部４６は、上下に複数個連設されると共に複数列に亘って（本実施形態では、７個×７列＝４９個）形成され、一定間隔で整列配置されている。下流側接地電極板３２の下流側開口部４６の単体面積及び合計面積は、いずれも、上流側接地電極板３１の上流側開口部４５より大きくなっている。 As best shown in FIG. 4, the downstream ground electrode plate 32 is a sheet of rectangular conductive metal (in the present embodiment, the It is formed in a flat plate shape from stainless steel) and attached to the frame 30 in a direction that blocks the flow of dust-containing air (a direction perpendicular to the flow direction of the dust-containing air). A plurality of downstream openings 46 of the downstream ground electrode plate 32 are arranged in series in the vertical direction and are formed in a plurality of rows (in this embodiment, 7 pieces×7 rows=49 pieces) and are aligned at regular intervals. are placed. Both the single area and the total area of the downstream opening 46 of the downstream ground electrode plate 32 are larger than the upstream opening 45 of the upstream ground electrode plate 31 .

図５～図７に示されているように、支持基板３４は、金属製で長尺板状の導体により構成されている。支持基板３４は、上流側接地電極板３１の左右に隣接する上流側開口部４５の列間において１つ置きに設けられ、下流側接地電極板３２の下流側開口部４６の中心に合致するように配置されており、本実施形態では、７個設けられている。これにより、支持基板３４は、含塵空気の流通方向から見て、上流側接地電極板３１の上流側開口部４５に干渉しないように配置されると共に、支持基板３４同士の間隔は、異常放電が発生しない程度に維持される。なお、本実施形態において、支持基板３４は、含塵空気の流通方向と平行で、且つ上流側接地電極板３１及び下流側接地電極板３２に対して直交する向きで配置されている。 As shown in FIGS. 5 to 7, the support substrate 34 is made of metal and is composed of a long plate-shaped conductor. The support substrates 34 are provided alternately between the rows of the upstream openings 45 adjacent to the left and right of the upstream ground electrode plate 31 so as to match the centers of the downstream openings 46 of the downstream ground electrode plate 32 . , and seven are provided in this embodiment. As a result, the support substrate 34 is arranged so as not to interfere with the upstream opening 45 of the upstream ground electrode plate 31 when viewed from the flow direction of the dust-containing air, and the distance between the support substrates 34 is reduced to prevent abnormal discharge. is maintained to the extent that it does not occur. In this embodiment, the support substrate 34 is arranged in a direction parallel to the flow direction of dust-containing air and perpendicular to the upstream ground electrode plate 31 and the downstream ground electrode plate 32 .

支持基板３４の上端部は、該上端部に形成されたフック穴（図示省略）と上取付部材４０との間に介装されたスプリング（図示省略）によって上取付部材４０に支持される。また、支持基板３４の下端部は、フック状に形成され、前記切欠部に掛止されることにより下取付部材４２に支持される。 The upper end portion of the support substrate 34 is supported by the upper mounting member 40 by a spring (not shown) interposed between a hook hole (not shown) formed in the upper end portion and the upper mounting member 40 . A lower end portion of the support substrate 34 is formed in a hook shape, and is supported by the lower mounting member 42 by engaging with the notch portion.

支持基板３４には、保持部としてのカシメ部４７が一体に形成されており、カシメ部４７は、上流側開口部４５側に延出する上流側カシメ部４７ａと下流側開口部４６側に延出する下流側カシメ部４７ｂとを備えて構成されている。上流側カシメ部４７ａは、隣接する２列分の上流側開口部４５の数（本実施形態では、１４個×２列＝２８個）に対応する数分形成されており、下流側カシメ部４７ｂは、１列分の下流側開口部４６の数（本実施形態では、７個）に対応する数分形成されている。なお、支持基板３４は、導電性を有する材料であれば良いが、伸展性が必要なカシメ加工の作業性を鑑みて、銅板又はアルミ板で形成されるのが良い。 A crimped portion 47 as a holding portion is formed integrally with the support substrate 34, and the crimped portion 47 extends toward the upstream opening portion 45 side and the downstream opening portion 46 side. and a downstream side caulking portion 47b. The upstream crimped portions 47a are formed in a number corresponding to the number of adjacent two rows of upstream openings 45 (14×2 rows=28 in this embodiment), and the downstream crimped portions 47b are formed. are formed in a number corresponding to the number of downstream openings 46 in one row (seven in this embodiment). The support substrate 34 may be made of a conductive material, but is preferably made of a copper plate or an aluminum plate in view of the workability of caulking that requires extensibility.

放電極３５は、多数の線材を束ねた放電ブラシ４８であり、支持基板３４から上流側接地電極板３１側に延出するように上流側カシメ部４７ａに保持されて各上流側開口部４５に対応して配置される上流側放電極３５ａと、支持基板３４から下流側接地電極板３２側に延出するように下流側カシメ部４７ｂに保持されて各下流側開口部４６に対応して配置される下流側放電極３５ｂと、を備えて構成されている。 The discharge electrode 35 is a discharge brush 48 formed by bundling a large number of wires, and is held by an upstream crimped portion 47 a so as to extend from the support substrate 34 toward the upstream ground electrode plate 31 side, and is attached to each upstream opening 45 . Corresponding upstream discharge electrodes 35a are held by downstream crimped portions 47b so as to extend from the supporting substrate 34 toward the downstream ground electrode plate 32 and are disposed corresponding to the respective downstream openings 46. and a downstream discharge electrode 35b.

上流側放電極３５ａは、各段の上流側カシメ部４７ａから上流側接地電極板３１の方向（すなわち、支持基板３４より含塵空気の流通方向上流側）にそれぞれ延出して互い違いに屈曲形成されている。上流側放電極３５ａの放電ブラシ４８の束の中心の先端部は、支持基板３４の左右両側に隣接する上流側開口部４５の中心線上において、該上流側開口部４５を貫通することなく該開口部４５から離間して配置されている。これにより、図６に示すように、上流側放電極３５ａの放電ブラシ４８の先端部と上流側接地電極板３１の上流側開口部４５の周縁部とがほぼ一定の放電ギャップＧ１を維持し、上流側放電極３５ａと上流側開口部４５との間にコロナ放電により形成される帯電エリアＥＡ１が略円錐形状を成すため、均一で安定的な放電状態を形成することができる。 The upstream discharge electrodes 35a extend from the upstream caulked portions 47a of each stage toward the upstream ground electrode plate 31 (that is, upstream from the support substrate 34 in the direction of flow of the dust-containing air) and are bent alternately. ing. The central tip of the bundle of the discharge brushes 48 of the upstream discharge electrode 35a is located on the center line of the upstream opening 45 adjacent to the left and right sides of the support substrate 34 without passing through the upstream opening 45. It is arranged apart from the portion 45 . As a result, as shown in FIG. 6, a substantially constant discharge gap G1 is maintained between the tip of the discharge brush 48 of the upstream discharge electrode 35a and the peripheral edge of the upstream opening 45 of the upstream ground electrode plate 31. Since the charged area EA1 formed by corona discharge between the upstream discharge electrode 35a and the upstream opening 45 has a substantially conical shape, a uniform and stable discharge state can be formed.

下流側放電極３５ｂは、各段の下流側カシメ部４７ｂから下流側接地電極板３２の方向（すなわち、支持基板より含塵空気の流通方向下流側）に水平直線状に延出し、下流側放電極３５ｂの放電ブラシ４８の先端部は下流側開口部４６の中心線上において、該下流側開口部４６を貫通することなく該開口部４６から離間して配置されている。これにより、図６に示すように、下流側放電極３５ｂの放電ブラシ４８の先端部と下流側開口部４６の周縁部とがほぼ一定の放電ギャップＧ２を維持し、下流側放電極３５ｂと下流側開口部４６との間にコロナ放電により形成される帯電エリアＥＡ２が上流側とは逆向きの略円錐状を成すため、均一で安定的な放電状態を形成することができる。 The downstream discharge electrode 35b extends horizontally and linearly from the downstream crimped portion 47b of each stage toward the downstream ground electrode plate 32 (that is, downstream of the support substrate in the direction of flow of the dust-containing air). The tip of the discharge brush 48 of the electrode 35b is arranged on the center line of the downstream opening 46 and is spaced apart from the opening 46 without penetrating the downstream opening 46 . As a result, as shown in FIG. 6, the tip of the discharge brush 48 of the downstream discharge electrode 35b and the peripheral edge of the downstream opening 46 maintain a substantially constant discharge gap G2, and the downstream discharge electrode 35b and the downstream discharge electrode 35b maintain a substantially constant discharge gap G2. Since the charged area EA2 formed by corona discharge between the side opening 46 and the side opening 46 has a substantially conical shape facing the opposite direction to the upstream side, a uniform and stable discharge state can be formed.

放電極３５の放電ブラシ４８は、繊維状の線材を多数束ねてブラシ状に形成された束状部を有している。線材は、直径１２μｍの非磁性のステンレス繊維で形成されており、ステンレスは、流通性と経済性と耐食性に優れた、１８％のＣｒと８％のＮｉを含むＳＵＳ３０４を使用している。なお、線材は、非磁性のステンレスであれば好適で、例えば、１８％のＣｒと１２％のＮｉにモリブデン（Ｍｏ）を添加したＳＵＳ３１６等、他の材質を使用しても良い。 The discharge brush 48 of the discharge electrode 35 has a bundled portion formed in a brush shape by bundling a large number of fibrous wires. The wire is made of non-magnetic stainless fiber with a diameter of 12 μm, and the stainless steel used is SUS304 containing 18% Cr and 8% Ni, which is excellent in flowability, economy and corrosion resistance. The wire material is preferably non-magnetic stainless steel, and other materials such as SUS316, which is 18% Cr, 12% Ni, and molybdenum (Mo) added, may be used.

１つの放電極３５は、例えば、約１００本の線材が束ねられることで形成されている。なお、放電極３５は、直径５～２５μｍの線材を１０～２００本束ねて形成されていても良い。複数の放電極３５は、支持基板３４から流通方向の上流側と下流側に向かって延びた状態で設けられており、放電極３５に高電圧が印加されると、線材同士の反発に加えて、流通する空気が線材の先端に直接的に当たるので、線材が束状部から離間する作用が高まり、強電界にコロナ放電を発生させることができる。線材のカシメ部からの突出長は、前述の束線数や線径では、５ｍｍ程度が好適である。なお、図５では、放電極３５の線材の先端側が開いた状態で示されているが、これは高電圧が印加された使用状態を示している。高電圧が印加されることで、各線材にはそれぞれ高電圧の極性に応じた電荷が蓄積されて各線材同士が反発し合うためである。 One discharge electrode 35 is formed by bundling about 100 wires, for example. The discharge electrode 35 may be formed by bundling 10 to 200 wire rods with a diameter of 5 to 25 μm. The plurality of discharge electrodes 35 are provided in a state of extending from the support substrate 34 toward the upstream side and the downstream side in the flow direction. Since the circulating air hits the tip of the wire directly, the effect of separating the wire from the bundle increases, and corona discharge can be generated in a strong electric field. The protruding length of the wire rod from the crimped portion is preferably about 5 mm for the above-described number of bundled wires and wire diameter. In FIG. 5, the tip side of the wire rod of the discharge electrode 35 is shown in an open state, which indicates a use state in which a high voltage is applied. This is because when a high voltage is applied, electric charges corresponding to the polarity of the high voltage are accumulated in each wire and the wires repel each other.

また、実際にコロナ放電が発生するのは、多数の線材のうちの一部であり、それが刻々と他の線材に交代しながらコロナ放電するため、帯電エリアＥＡ１およびＥＡ２の略円錐形状は、若干であるが刻々と変化する。 In addition, the corona discharge actually occurs in a part of a large number of wire rods, and the corona discharge occurs while it is replaced by other wire rods moment by moment. It's a little bit, but it changes every second.

上述したように、上流側放電極３５ａ、下流側放電極３５ｂの放電ブラシ４８は、高電圧が印加されない状態では、ほぼ直線状の束となっていて、放電ブラシ４８の中心はブラシの束の中心である。厳密に言うと、高電圧を印加した状態では、放電ブラシ４８の束の中心は刻々と変化するが、ここでは、簡略化のため、その点については考慮していない。 As described above, the discharge brushes 48 of the upstream discharge electrode 35a and the downstream discharge electrode 35b form a substantially linear bundle when no high voltage is applied, and the center of the discharge brush 48 is the brush bundle. Central. Strictly speaking, when a high voltage is applied, the center of the bundle of the discharge brush 48 changes moment by moment, but for the sake of simplification, this point is not considered here.

また、上述した線材のカシメ部からの突出長、線径では、高電圧を印加しない状態で支持基板３４が如何なる姿勢で利用されたとしても、線材の自重で放電ブラシ４８の先端が垂れ下がってしまうようなことが無いので、上流側開口部４５や下流側開口部４６の周縁部との距離が安定して維持され、高電圧を印加した時に適正にコロナ放電を開始することができる。同様に、高電圧を印加して放電ブラシ４８の多数の線材の先端部が互いに反発し合って離間した際に、適度な開き具合に収めることができる。すなわち、上流側開口部４５や下流側開口部４６を図６に示すＡ方向から見て、放電ブラシ４８の先端部が対応する開口部の径の範囲に収まっているので、コロナ放電が発生する多数の線材が刻々と切り替わったとしても常に安定した帯電エリアＥＡ１、ＥＡ２が生成される。 In addition, with the length and diameter of the wire protruding from the caulked portion described above, the tip of the discharge brush 48 hangs down due to the weight of the wire even if the support substrate 34 is used in any posture without applying a high voltage. Therefore, the distance from the periphery of the upstream opening 45 and the downstream opening 46 can be stably maintained, and corona discharge can be appropriately started when a high voltage is applied. Similarly, when a high voltage is applied and the ends of the many wires of the discharge brush 48 repel each other and are separated from each other, they can be accommodated in an appropriate degree of opening. That is, when the upstream side opening 45 and the downstream side opening 46 are viewed from the direction A shown in FIG. 6, the tip of the discharge brush 48 is within the range of the diameter of the corresponding opening, so corona discharge is generated. Even if a large number of wire rods are constantly switched, stable charged areas EA1 and EA2 are always generated.

次に、上記した構成を備えた本発明の実施形態に係る空気清浄機の作用について説明する。 Next, the operation of the air purifier according to the embodiment of the present invention having the configuration described above will be described.

図１に示すように、吸引ファン１１の駆動により吸気口４から筐体１内に流入した含塵空気は、プレフィルタ７で濾過された後、荷電装置８に流入する。 As shown in FIG. 1 , dust-laden air that has flowed into the housing 1 from the intake port 4 by driving the suction fan 11 is filtered by the prefilter 7 and then flows into the charging device 8 .

図３～図６に示すように、荷電装置８において、含塵空気は、上流側接地電極板３１の上流側開口部４５を通過した後、下流側接地電極板３２の下流側開口部４６を通過する。このように上流側接地電極板３１の上流側開口部４５及び下流側接地電極板３２の下流側開口部４６を通過する際、含塵空気中の微粉塵又はミスト等の粒子や微細なウィルス等は帯電され、集塵装置９において捕集された後、消臭ユニット１０を通過する。これにより、含塵空気は濾過されて清浄空気となり、排気口５から空気清浄機の外へ排出される。 As shown in FIGS. 3 to 6, in the charging device 8, the dust-laden air passes through the upstream opening 45 of the upstream ground electrode plate 31 and then flows through the downstream opening 46 of the downstream ground electrode plate 32. pass. When passing through the upstream opening 45 of the upstream ground electrode plate 31 and the downstream opening 46 of the downstream ground electrode plate 32 in this way, particles such as fine dust or mist in the dust-containing air, fine viruses, etc. is charged and collected in the dust collector 9, and then passes through the deodorizing unit 10. As a result, the dust-containing air is filtered to become clean air, which is discharged from the air outlet 5 to the outside of the air purifier.

このように上記した本発明の実施形態に係る空気清浄機によれば、上流側放電極３５ａと上流側開口部４５との間、及び下流側放電極３５ｂと下流側開口部４６との間には、コロナ放電により均一で安定的な放電エリアがそれぞれ形成されるため、含塵空気中の微粉塵やミストやウィルス等を均一に帯電することができる。 As described above, according to the air cleaner according to the embodiment of the present invention, between the upstream discharge electrode 35a and the upstream opening 45 and between the downstream discharge electrode 35b and the downstream opening 46 Since uniform and stable discharge areas are formed by corona discharge, fine dust, mist, viruses, etc. in dust-containing air can be uniformly charged.

また、放電極３５に放電ブラシ４８を採用したことで、多数の放電ブラシ４８の先端部が交代で放電されるため、先端部が汚れ難く、長期間安定した放電を行うことができ、耐久性の向上を図ることができる。 In addition, since the discharge brushes 48 are used as the discharge electrode 35, the tips of the many discharge brushes 48 are alternately discharged, so that the tips are less likely to get dirty, stable discharge can be performed for a long period of time, and durability is ensured. can be improved.

また、含塵空気の流通方向に対して直交する向きに上流側接地電極板３１及び下流側接地電極板３２が配置され、上流側接地電極板３１及び下流側接地電極板３２に多数の開口部４５，４６が形成されることにより、上流側接地電極板３１及び下流側接地電極板３２は、荷電装置８のアース板の機能を有すると共に、含塵空気を整流する機能を有するため、別途整流板を設ける必要がなく、その分コストの低減化を図ることができる。 Further, the upstream ground electrode plate 31 and the downstream ground electrode plate 32 are arranged in a direction perpendicular to the direction of flow of the dust-containing air, and the upstream ground electrode plate 31 and the downstream ground electrode plate 32 have a large number of openings. By forming 45 and 46, the upstream ground electrode plate 31 and the downstream ground electrode plate 32 have the function of the ground plate of the charging device 8 and the function of rectifying dust-containing air. Since there is no need to provide a plate, the cost can be reduced accordingly.

さらに、支持基板３４には、端部から延出した保持部４７としてカシメ部が形成されているため、保持された放電極３５が支持基板３４の端部からの距離が遠ざかるため、不平等電界が生成され易くなり、放電性能を向上させることができる。 Furthermore, since the support substrate 34 is formed with a crimped portion as the holding portion 47 extending from the end portion, the held discharge electrode 35 becomes farther from the end portion of the support substrate 34, and an uneven electric field is generated. is easily generated, and discharge performance can be improved.

次に、図８を参照しつつ、本発明の実施形態における放電極部材３３の製造工程について説明する。ここで、図８（１）、（２）、（３）は本発明の実施形態における放電極部材３３の製造工程を順番に示す説明図である。なお、図８では、線材に高電圧が印加されていない状態を示しているため、線材の束の先端は、図５のように開いてはいない。 Next, a manufacturing process of the discharge electrode member 33 according to the embodiment of the present invention will be described with reference to FIG. Here, FIGS. 8(1), (2), and (3) are explanatory diagrams sequentially showing the steps of manufacturing the discharge electrode member 33 according to the embodiment of the present invention. Note that FIG. 8 shows a state in which no high voltage is applied to the wires, so the ends of the wire bundles are not open as in FIG.

まず、図８（１）に示すように、金属製の薄板に対してプレスで抜き加工を行い、上流側カシメ部４７ａ及び下流側カシメ部４７ｂを一体に形成した後、各カシメ部４７ａ，４７ｂをＶ字形状に曲げ起こすことで、支持基板３４を製造する。なお、この場合、Ｖ字形状に代えてＵ字形状でもよい。一方、繊維状の線材を所定本数束ねてブラシ状に形成された放電ブラシ４８を各カシメ部４７ａ，４７ｂに供給する。 First, as shown in FIG. 8(1), a thin metal plate is punched by a press to integrally form an upstream crimped portion 47a and a downstream crimped portion 47b. is bent into a V shape to manufacture the support substrate 34 . In this case, a U-shape may be used instead of the V-shape. On the other hand, a discharge brush 48 formed in a brush shape by bundling a predetermined number of fibrous wires is supplied to each of the crimped portions 47a and 47b.

次に、図８（２）に示すように、各カシメ部４７ａ，４７ｂに供給された放電ブラシ４８を、カシメ部４７ａ，４７ｂと共にカシメて各カシメ部４７ａ，４７ｂに保持させた後、カシメ部４７ａ，４７ｂから放電ブラシ４８の先端が所定長突出した状態にカットする。そして、この作業を、各段の上流側と下流側のそれぞれのカシメ部４７ａ，４７ｂにおいて順次行う。 Next, as shown in FIG. 8B, the discharge brush 48 supplied to each of the crimped portions 47a and 47b is crimped together with the crimped portions 47a and 47b to be held by the crimped portions 47a and 47b. The tip of the discharge brush 48 is cut so as to protrude from 47a and 47b by a predetermined length. Then, this work is sequentially performed at the crimped portions 47a and 47b on the upstream side and the downstream side of each stage.

最後に、図８（３）に示すように、上流側カシメ部４７ａの根元部をそれぞれａ方向とｂ方向に交互に曲げ加工を行った後、補強のため、金属製の保護板４９を支持基板３４の表面に接合する。 Finally, as shown in FIG. 8(3), the base portion of the upstream caulked portion 47a is bent alternately in directions a and b, and then a metal protective plate 49 is supported for reinforcement. It is bonded to the surface of substrate 34 .

以上により、支持基板３４に放電極３５を備えた放電極部材３３を容易且つ安価に製造することができる。 As described above, the discharge electrode member 33 having the discharge electrode 35 on the support substrate 34 can be manufactured easily and inexpensively.

なお、カシメ加工の作業性を考慮して支持基板３４の板厚を設定しても、強度（使用時の気流に対抗する曲げ強度や、洗浄時の取り扱い時に変形しない程度の強度）が十分であれば、保護板４９を取り付けなくても構わない。 Even if the thickness of the support substrate 34 is set in consideration of the workability of the caulking process, the strength (bending strength against air currents during use and strength to the extent that it does not deform during handling during cleaning) is not sufficient. If so, the protective plate 49 may not be attached.

次に、図９を参照しつつ、本発明の実施形態における第２の実施例の放電極部材３３の製造工程について説明する。ここで、図９（１）、（２）、（３）は本発明の実施形態における第２の実施例の放電極部材３３の製造工程を順番に示す説明図である。なお、図９では、線材に高電圧が印加されていない状態を示しているため、線材の先端は、図５のように開いてはいない。 Next, the manufacturing process of the discharge electrode member 33 of the second example of the embodiment of the present invention will be described with reference to FIG. Here, FIGS. 9(1), (2), and (3) are explanatory diagrams sequentially showing the steps of manufacturing the discharge electrode member 33 of the second example of the embodiment of the present invention. Since FIG. 9 shows a state in which no high voltage is applied to the wire, the tip of the wire is not open as shown in FIG.

まず、図９（１）に示すように、金属製の薄板に対してプレスで抜き加工を行い、上流側カシメ部４７ａ及び下流側カシメ部４７ｂを一体に形成した後、各カシメ部４７ａ，４７ｂをＶ字形状に曲げ起こすことで、支持基板３４を製造する。一方、予めアルミテープ製の金属箔帯状体５１から上流側及び下流側にそれぞれ所定長突出するように所定間隔で所定本数の放電ブラシ４８を取り付けたブラシユニットとしてのアルミテープ型ブラシ５０を用意し、支持基板３４の表面に貼り付け、放電ブラシ４８を各カシメ部４７ａ，４７ｂに供給する。 First, as shown in FIG. 9(1), a thin metal plate is punched by a press to integrally form the upstream crimped portion 47a and the downstream crimped portion 47b, and then the crimped portions 47a and 47b are formed integrally. is bent into a V shape to manufacture the support substrate 34 . On the other hand, an aluminum tape-type brush 50 is prepared in advance as a brush unit in which a predetermined number of discharge brushes 48 are attached at predetermined intervals so as to protrude upstream and downstream from a metal foil strip 51 made of aluminum tape by predetermined lengths. , is attached to the surface of the support substrate 34, and the discharge brush 48 is supplied to each of the crimped portions 47a and 47b.

次に、図９（２）に示すように、各カシメ部４７ａ，４７ｂに供給された放電ブラシ４８を、カシメ部４７ａ，４７ｂと共にカシメて各カシメ部４７ａ，４７ｂに保持させる。この作業を、各段の上流側と下流側のそれぞれのカシメ部４７ａ，４７ｂにおいて順次行う。 Next, as shown in FIG. 9B, the discharge brush 48 supplied to each of the crimped portions 47a and 47b is crimped together with the crimped portions 47a and 47b to be held by each of the crimped portions 47a and 47b. This operation is sequentially performed at the crimped portions 47a and 47b on the upstream side and the downstream side of each stage.

最後に、図９（３）に示すように、上流側カシメ部４７ａの根元部をそれぞれａ方向とｂ方向に交互に曲げ加工を行った後、補強のため、金属製の保護板４９を支持基板３４の表面のアルミテープの金属箔帯状体５１上に接合する。 Finally, as shown in FIG. 9(3), after alternately bending the base portion of the upstream crimped portion 47a in directions a and b, a metal protective plate 49 is supported for reinforcement. It is bonded onto the metal foil strip 51 of the aluminum tape on the surface of the substrate 34 .

以上により、支持基板３４に放電極３５を備えた放電極部材３３が製造される。この場合、除電目的の部材として市販に広く流通しているアルミテープ型ブラシ５０を利用しているため、放電極部材３３の製造工程において、放電ブラシ４８を供給する製造設備等を用意する必要がなくなるため、イニシャルコストを低減させることができる。したがって、放電極部材３３をより容易且つより安価に製造することができる。 As described above, the discharge electrode member 33 having the discharge electrode 35 on the support substrate 34 is manufactured. In this case, since the aluminum tape type brush 50 which is widely distributed on the market is used as a member for the static elimination purpose, it is necessary to prepare manufacturing equipment for supplying the discharge brush 48 in the manufacturing process of the discharge electrode member 33 . Therefore, the initial cost can be reduced. Therefore, the discharge electrode member 33 can be manufactured more easily and at a lower cost.

次に、図１０を参照しつつ、本発明の実施形態における第３の実施例の放電極部材３３の製造工程について説明する。ここで、図１０は本発明の実施形態における第３の実施例の放電極部材３３の製造工程を示す説明図である。なお、図１０では、線材に高電圧が印加されていない状態を示しているため、線材の先端は、図５のように開いてはいない。 Next, referring to FIG. 10, the manufacturing process of the discharge electrode member 33 of the third embodiment of the present invention will be described. Here, FIG. 10 is an explanatory diagram showing the manufacturing process of the discharge electrode member 33 of the third example in the embodiment of the present invention. Since FIG. 10 shows a state in which no high voltage is applied to the wire, the tip of the wire is not open as shown in FIG.

本実施例の放電極部材３３の製造工程においても、上記した第２の実施例と同様に、市販のアルミテープ型ブラシ５０が使用される。また、支持基板３４の基材として樹脂材が使用され、アルミテープ型ブラシ５０と、放電ブラシ４８の根元を保持する保持部５２とを、インサート成型することで支持基板３４を一体的に形成させる。 Also in the manufacturing process of the discharge electrode member 33 of this embodiment, a commercially available aluminum tape-type brush 50 is used as in the above-described second embodiment. A resin material is used as the base material of the support substrate 34, and the support substrate 34 is integrally formed by insert-molding the aluminum tape-type brush 50 and the holding portion 52 that holds the base of the discharge brush 48. .

このようにアルミテープ製の金属箔帯状体５１を利用することで放電ブラシ４８の導通性を保つことができる。また、全体の構造と放電ブラシ４８の方向性の維持と強度は、樹脂の成型性を利用して複雑な形状を金型製作することにより実現することができ、大量生産時には部材コストの低減化を図ることができる。 By using the metal foil strip 51 made of aluminum tape in this manner, the electrical conductivity of the discharge brush 48 can be maintained. Further, the directionality and strength of the entire structure and the discharge brush 48 can be maintained by manufacturing a mold with a complicated shape using the moldability of the resin, and the cost of parts can be reduced during mass production. can be achieved.

また、樹脂の金型形状により、支持基板３４の断面形状を、図１０に示すように流線形にしたり、或いは表面に凹凸や模様を施したりすることにより、支持基板３４の周囲を流通する気流に渦流又は／及び乱流を発生させる流動性形状として気流を制御することが可能となる。 In addition, by making the cross-sectional shape of the support substrate 34 streamlined as shown in FIG. 10 by the shape of the resin mold, or by giving unevenness or patterns to the surface, air currents circulating around the support substrate 34 can be controlled. It is possible to control the airflow as a flowable shape that generates swirl and/or turbulence in the air.

また、支持基板３４の端面を尖らせたり、曲面で構成したりすることで、気流に含まれる塵埃の堆積・滞留を防止することができ、容易に洗浄することができるため、メンテナンス時の洗浄性を向上させることができる。 In addition, by sharpening the end face of the support substrate 34 or forming it with a curved surface, it is possible to prevent the accumulation and retention of dust contained in the airflow, and it is possible to clean the substrate easily. can improve sexuality.

さらに、支持基板３４は、樹脂の各種材料を採用することも可能であり、例えば、光触媒を練り込んだ材料を使用して、ＵＶ照射ランプにより消臭機能や抗ウィルス機能を発揮させることができる。したがって、感染症対策として空気清浄機を利用することも可能となる。具体的には、二酸化チタンを含有して光触媒による抗菌・防汚機能を有する樹脂材料が既に実用されており、このような材料を支持基板３４に利用するのが好適である（例えば、https://pr.fujitsu.com/jp/news/2004/04/6.html を参照）。 Furthermore, the support substrate 34 can also be made of various resin materials. For example, a material into which a photocatalyst is kneaded can be used to exhibit a deodorizing function and an antiviral function by means of a UV irradiation lamp. . Therefore, it becomes possible to use an air purifier as a countermeasure against infectious diseases. Specifically, resin materials containing titanium dioxide and having photocatalytic antibacterial and antifouling functions are already in practical use, and it is preferable to use such materials for the support substrate 34 (for example, https: http://pr.fujitsu.com/jp/news/2004/04/6.html).

次に、図１１及び図１２を参照しつつ、本発明の他の実施形態に係る荷電装置６０について説明する。ここで、図１１は本発明の他の実施形態に係る荷電装置６０を部分的に拡大して示す平断面図、図１２は図１１のＢ矢視図である。なお、以下の説明では、説明の簡略化のため、上記した実施形態における荷電装置８と同等の構成については、詳細な説明を省略する。 Next, a charging device 60 according to another embodiment of the present invention will be described with reference to FIGS. 11 and 12. FIG. Here, FIG. 11 is a partially enlarged plan sectional view showing a charging device 60 according to another embodiment of the present invention, and FIG. 12 is a view taken from arrow B in FIG. In the following description, for simplification of description, detailed description of the configuration equivalent to that of the charging device 8 in the above-described embodiment will be omitted.

本実施形態の荷電装置６０は、上流側接地電極板６１と、下流側接地電極板６２とが平行に配置され、上流側接地電極板６１と下流側接地電極板６２との間に放電極部材６３が配置されている。 In the charging device 60 of the present embodiment, an upstream ground electrode plate 61 and a downstream ground electrode plate 62 are arranged in parallel, and a discharge electrode member is disposed between the upstream ground electrode plate 61 and the downstream ground electrode plate 62. 63 are arranged.

上流側接地電極板６１及び下流側接地電極板６２にはそれぞれ複数の上流側開口部６４及び下流側開口部６５が形成されている。上流側開口部６４及び下流側開口部６５は、いずれも千鳥状に配置され、且つ、図１２に示されているように立面視で互い違いとなるように配置されている。上流側開口部６４と下流側開口部６５は、同一数形成され、その単体面積及び合計面積も同一となるように形成されている。 A plurality of upstream openings 64 and downstream openings 65 are formed in the upstream ground electrode plate 61 and the downstream ground electrode plate 62, respectively. The upstream openings 64 and the downstream openings 65 are both arranged in a zigzag pattern, and are arranged alternately in a vertical view as shown in FIG. The same number of upstream openings 64 and downstream openings 65 are formed, and the single area and the total area are also the same.

放電極部材６３は、支持部材としての支持基板６６と、支持基板６６に保持される放電極６７と、を備えて構成されている。放電極６７は、上流側カシメ部６８ａに保持されて各上流側開口部６４に対応して配置される上流側放電極６７ａと、下流側カシメ部６８ｂに保持されて各下流側開口部６５に対応して配置される下流側放電極６７ｂと、を備えている。 The discharge electrode member 63 includes a support substrate 66 as a support member and a discharge electrode 67 held by the support substrate 66 . The discharge electrode 67 includes an upstream discharge electrode 67a held by an upstream crimped portion 68a and arranged corresponding to each upstream opening 64, and a downstream discharge electrode 67a held by a downstream crimped portion 68b and arranged at each downstream opening 65. and a correspondingly disposed downstream discharge electrode 67b.

上流側放電極６７ａは、上流側接地電極板６１の方向（すなわち、支持基板６６より含塵空気の流通方向上流側）にそれぞれ延出して互い違いに屈曲形成されている。上流側放電極６７ａの放電ブラシ６９の束の中心の先端部は、支持基板６６の左右両側に隣接する上流側開口部６４の中心線上において、該上流側開口部６４を貫通することなく該開口部６４から離間して配置されている。これにより、図１１に示すように、上流側放電極６７ａの放電ブラシ６９の先端部と上流側開口部６４の周縁部とが一定の放電ギャップＧ３を維持し、上流側放電極６７ａと上流側開口部６４との間にコロナ放電により形成される帯電エリアＥＡ３が略円錐形状を成すため、均一で安定的な放電状態を形成することができる。 The upstream discharge electrodes 67a are bent alternately so as to extend in the direction of the upstream ground electrode plate 61 (that is, upstream from the support substrate 66 in the flow direction of dust-containing air). The central tip of the bundle of the discharge brushes 69 of the upstream discharge electrode 67a is located on the center line of the upstream opening 64 adjacent to the left and right sides of the supporting substrate 66 without passing through the upstream opening 64. It is spaced apart from the portion 64 . As a result, as shown in FIG. 11, the tip of the discharge brush 69 of the upstream discharge electrode 67a and the peripheral edge of the upstream opening 64 maintain a constant discharge gap G3, and the upstream discharge electrode 67a and the upstream discharge electrode 67a maintain a constant discharge gap G3. Since the charging area EA3 formed by corona discharge between the opening 64 and the charging area EA3 has a substantially conical shape, a uniform and stable discharge state can be formed.

下流側放電極６７ｂは、下流側接地電極板６２の方向（すなわち、支持基板６６より含塵空気の流通方向上流側）にそれぞれ延出して互い違いに屈曲形成されている。下流側放電極６７ｂの放電ブラシ６９の束の中心の先端部は、支持基板６６の左右両側に隣接する下流側開口部６５の中心線上において、該下流側開口部６５を貫通することなく該開口部６５から離間して配置されている。これにより、図１１に示すように、下流側放電極６７ｂの放電ブラシ６９の先端部と下流側開口部６５の周縁部とが一定の放電ギャップＧ３を維持し、下流側放電極６７ｂ放電ブラシ６９の先端部と下流側開口部６５との間にコロナ放電により形成される帯電エリアＥＡ３が略円錐形状を成すため、均一で安定的な放電状態を形成することができる。 The downstream discharge electrodes 67b are bent alternately so as to extend in the direction of the downstream ground electrode plate 62 (that is, upstream from the support substrate 66 in the flow direction of dust-containing air). The central tip of the bundle of the discharge brushes 69 of the downstream discharge electrode 67b is located on the center line of the downstream opening 65 adjacent to the left and right sides of the support substrate 66 without passing through the downstream opening 65. It is arranged apart from the portion 65 . As a result, as shown in FIG. 11, the tip of the discharge brush 69 of the downstream discharge electrode 67b and the peripheral edge of the downstream opening 65 maintain a constant discharge gap G3, and the discharge brush 69 of the downstream discharge electrode 67b maintains a constant discharge gap G3. Since the charged area EA3 formed by the corona discharge between the tip of the charge and the downstream opening 65 has a substantially conical shape, a uniform and stable discharge state can be formed.

このように上記した本実施形態に係る空気清浄機によれば、支持基板６６から上流側開口部６４と下流側開口部６５にそれぞれ同じ段の上流側放電極６７ａと下流側放電極６７ｂが互いに曲げ方向と突出方向を異ならせながら配置されることで、下流側放電極６７ｂの配置数が上記した実施形態における荷電装置８と比べて２倍になるため、帯電効率をさらに向上させることができる。 As described above, according to the air purifier according to the present embodiment, the upstream side discharge electrode 67a and the downstream side discharge electrode 67b on the same stage from the support substrate 66 to the upstream side opening 64 and the downstream side opening 65 are connected to each other. By arranging the downstream discharge electrodes 67b with different bending directions and projecting directions, the number of downstream discharge electrodes 67b arranged is doubled compared to the charging device 8 in the above-described embodiment, so that the charging efficiency can be further improved. .

また、上流側開口部６４と下流側開口部６５とが、図１２に示されているように立面視で互い干渉する配置になっているため、この間を流通する気流が直進せずに必ず回流して流速が低下する。これにより、気流が上下の放電エリアに流通しやすくなり、帯電効率をさらに向上させることができる。 In addition, since the upstream opening 64 and the downstream opening 65 are arranged to interfere with each other in a vertical view as shown in FIG. It circulates and the flow velocity decreases. This makes it easier for the airflow to flow through the upper and lower discharge areas, thereby further improving the charging efficiency.

なお、支持基板３４，６６の平面形状は、上記したように図６に示すＹ字形状や、図１１に示すＸ字形状に限らず、例えば、図１３に示すようなＫ字形状であっても良い。その場合、金属製の支持基板３４，６６にアルミテープ型ブラシ５０を貼り付けてカシメ部を曲げ加工する場合には、カシメる際に金属が覆いかぶさる方向に曲げ加工するのが良い。これは、カシメ部をその反対側に曲げ加工すると、アルミテープ型ブラシの金属箔帯状体５１から一体的に延びる放電ブラシ４８，６９の中間部分に引っ張り応力が加わり、線材の破断や抜け落ちが発生し易くなるのに対して、カシメる際に金属が覆いかぶさる方向に曲げ加工することにより、アルミテープ型ブラシ５０の金属箔帯状体５１から一体的に延びる放電ブラシ４８，６９の中間部分にほとんど応力が加わらないため、放電ブラシ４８，６９の破断や抜け落ちの発生を抑制することができ、耐久性を向上させることができるからである。また、上流側開口部と下流側開口部の数が２対１の関係の場合には、特に図示しないが、支持基板３４，６６の平面形状として、小文字のｙ字形状が好適であると言え、さらにこれを組み合わせてそれぞれに良いところを利用する形状も考えられる。 The planar shape of the supporting substrates 34 and 66 is not limited to the Y shape shown in FIG. 6 or the X shape shown in FIG. Also good. In this case, when the aluminum tape-type brush 50 is attached to the metal support substrates 34 and 66 and the crimped portion is bent, it is preferable to bend the metal in the direction in which it overlaps during crimping. This is because when the crimped portion is bent to the opposite side, a tensile stress is applied to the intermediate portions of the discharge brushes 48 and 69 integrally extending from the metal foil strip 51 of the aluminum tape-type brush, causing the wire to break or come off. On the other hand, by bending in the direction in which the metal is overlaid during crimping, the intermediate portions of the discharge brushes 48 and 69 integrally extending from the metal foil strip 51 of the aluminum tape-type brush 50 are mostly bent. This is because no stress is applied to the discharge brushes 48 and 69, so that the discharge brushes 48 and 69 can be prevented from breaking or coming off, and the durability can be improved. In addition, when the number of upstream openings and downstream openings is in a two-to-one relationship, it can be said that a small letter y shape is preferable as the planar shape of the support substrates 34 and 66, although not shown. , and further combinations of these to utilize the advantages of each.

上記したように本発明に係る荷電装置及び空気清浄機によれば、塵埃・微粒子・ウィルスを効率よく荷電し、帯電効率を向上させることができ、空気を容易に清浄化させることができる。 As described above, according to the charging device and the air cleaner according to the present invention, dust, fine particles, and viruses can be efficiently charged, the charging efficiency can be improved, and the air can be easily cleaned.

また、上記したように本発明に係る荷電装置及び空気清浄機によれば、支持基板の製造方法や構造についても各種変更が考えられ、イニシャルコストや部材コストなど、ロット数や製造設備の投資の状態に応じて、最適な状態を提供することができる。 Further, as described above, according to the charging device and the air purifier according to the present invention, various changes can be considered in the manufacturing method and structure of the support substrate, and the initial cost, member cost, etc., and the number of lots and investment in manufacturing equipment can be reduced. Optimal conditions can be provided depending on the conditions.

なお、上記した本発明の実施形態の説明は、本発明に係る荷電装置や空気清浄機における好適な実施形態例を説明しているもので、技術的に好ましい種々の限定を付している場合もあるが、本発明の技術範囲は、特に本発明を限定する記載がない限り、これらの態様に限定されるものではない。すなわち、上記した本発明の実施形態における構成要素は適宜、既存の構成要素等との置き換えが可能であり、且つ、他の既存の構成要素との組合せを含む様々なバリエーションが可能であり、上記した本発明の実施形態の記載をもって、特許請求の範囲に記載された発明の内容を限定するものではない。 It should be noted that the above description of the embodiments of the present invention describes preferred embodiments of the charging device and the air purifier according to the present invention, and various technically preferable limitations are given. However, the technical scope of the present invention is not limited to these embodiments unless there is a description that specifically limits the present invention. That is, the constituent elements in the embodiments of the present invention described above can be appropriately replaced with existing constituent elements and the like, and various variations including combinations with other existing constituent elements are possible. The description of the embodiments of the present invention is not intended to limit the content of the invention described in the claims.

本発明の技術は、家庭用や業務用の空気清浄機において利用されることが見込まれるとともに、加工工場等で発生する粉塵やオイルミストを吸引して捕集する電気集塵機で利用されることが見込まれるものである。 INDUSTRIAL APPLICABILITY The technology of the present invention is expected to be used in household and commercial air purifiers, and is also expected to be used in electric dust collectors that absorb and collect dust and oil mist generated in processing factories and the like. It is expected.

４吸気口
５排気口
８荷電装置
９集塵装置
１１吸引ファン（送風手段）
３１上流側接地電極板（対向電極）
３２下流側接地電極板（対向電極）
３４支持基板（支持部材）
３５放電極
３５ａ上流側放電極
３５ｂ下流側放電極
４５上流側開口部
４６下流側開口部
４７カシメ部（保持部）
４８放電ブラシ
５０アルミテープ型ブラシ（ブラシユニット）
５１金属箔帯状体
６０荷電装置
６１上流側接地電極板
６２下流側接地電極板
６４上流側開口部
６５下流側開口部
６６支持基板（支持部材）
６７放電極
６７ａ上流側放電極
６７ｂ下流側放電極
６４上流側開口部
６５下流側開口部
６９放電ブラシ 4 intake port 5 exhaust port 8 charging device 9 dust collecting device 11 suction fan (blowing means)
31 upstream ground electrode plate (counter electrode)
32 downstream ground electrode plate (counter electrode)
34 support substrate (support member)
35 discharge electrode 35a upstream discharge electrode 35b downstream discharge electrode 45 upstream opening 46 downstream opening 47 crimped portion (holding portion)
48 discharge brush 50 aluminum tape type brush (brush unit)
51 Metal foil strip 60 Charging device 61 Upstream ground electrode plate 62 Downstream ground electrode plate 64 Upstream opening 65 Downstream opening 66 Support substrate (support member)
67 discharge electrode 67a upstream discharge electrode 67b downstream discharge electrode 64 upstream opening 65 downstream opening 69 discharge brush

Claims

In a charging device that applies a voltage to a discharge electrode arranged in an airflow passage to generate a corona discharge between it and a counter electrode that is grounded,
The counter electrode is arranged so as to block the flow path of the airflow and is formed in a flat plate shape having a plurality of openings,
The discharge electrode is a discharge brush in which a large number of wires are bundled, and a plurality of discharge electrodes are arranged corresponding to the plurality of openings,
A charging device, wherein a center tip portion of the bundle of the discharge brushes of the discharge electrode is arranged on a center line of the opening and is spaced apart from the opening without penetrating the opening. .

The counter electrodes are arranged on the upstream side and the downstream side in the direction of flow of the airflow, respectively, with the discharge electrode interposed therebetween,
2. The charging device according to claim 1, wherein the discharge electrodes include an upstream discharge electrode facing upstream in the flow direction of the airflow and a downstream discharge electrode facing downstream.

3. The charging device according to claim 2, wherein a plurality of said upstream discharge electrodes and said downstream discharge electrodes are provided corresponding to said openings of said upstream and downstream counter electrodes, respectively.

4. The charging device according to claim 3, wherein the openings of the upstream and downstream counter electrodes are provided in the same number and have the same opening area.

5. The apparatus according to any one of claims 1 to 4, further comprising a plurality of support members each having a plurality of holding portions for holding said discharge brush, said support members being arranged in parallel at equal intervals in said flow path. A charging device as claimed in any preceding claim.

6. The charging device according to claim 5, wherein the supporting member is a long plate-like conductor made of metal, and the holding portion is integrally formed.

A brush unit in which brushes are attached at regular intervals in a metal foil strip state in advance is joined to the support member, and the base of the discharge brush is crimped and held by the holding portion. Charging device as described.

The support member is an elongated body made of plastic, and a brush unit in which brushes are attached in advance to a metal foil strip at regular intervals, and a holding portion for holding the base of the discharge brush are integrally formed by insert molding. 6. The charging device according to claim 5, wherein the charging device is formed in a .

8. The support member has a flowable shape in a direction orthogonal to the longitudinal direction that generates eddy currents and/or turbulence in air currents flowing around the support member. The charging device according to .

10. The charging device according to claim 9, wherein the support member contains titanium dioxide and has an antibacterial/antifouling function due to a photocatalyst.

In an air cleaner equipped with the charging device according to any one of claims 1 to 10,
An inlet, an outlet, an air blower, and a dust collector arranged downstream of the charging device,
The dust, fine particles, and viruses contained in the air sucked from the intake port by the air blowing means are charged by the charging device, and then the dust collecting device adsorbs them, and clean air is discharged from the exhaust port. Characteristic air purifier.