JP6812846B2 - Electrostatic precipitator - Google Patents

Electrostatic precipitator Download PDF

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JP6812846B2
JP6812846B2 JP2017035728A JP2017035728A JP6812846B2 JP 6812846 B2 JP6812846 B2 JP 6812846B2 JP 2017035728 A JP2017035728 A JP 2017035728A JP 2017035728 A JP2017035728 A JP 2017035728A JP 6812846 B2 JP6812846 B2 JP 6812846B2
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sheet
electrode plate
rib
gnd
notch
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JP2018140346A (en
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健太郎 永吉
健太郎 永吉
加奈絵 栗田
加奈絵 栗田
喜内　一彰
一彰 喜内
佐藤　拓也
拓也 佐藤
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Fujitsu General Ltd
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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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust

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Description

本発明は、電気集塵装置、特に空気調和機又は空気清浄機に用いられる電気集塵装置に関する。 The present invention relates to an electrostatic precipitator, particularly an electrostatic precipitator used in an air conditioner or an air purifier.

従来、空気調和機又は空気清浄機においては、塵や埃などを帯電させる荷電部と、帯電した塵や埃などを集塵する集塵部を備えた電気集塵装置が設けられている。通常、集塵部には長方形に形成されたシート状の電極が複数向い合せに配置されており、この配置により、電極間に静電界を形成して、塵や埃などを集塵している。集塵部の筐体には、電極を挟んで固定するリブが設けられており、このリブは高電圧側の電極とグランド側の電極のうち一方を固定している。そして、電極には、極性の異なる電極間の絶縁を確保するために、リブと接触しないように切欠きが設けられている。 Conventionally, in an air conditioner or an air purifier, an electrostatic precipitator provided with a charged unit for charging dust and dirt and a dust collecting unit for collecting the charged dust and dirt is provided. Normally, a plurality of rectangular sheet-shaped electrodes are arranged facing each other in the dust collecting portion, and by this arrangement, an electrostatic field is formed between the electrodes to collect dust and dirt. .. The housing of the dust collector is provided with ribs that sandwich and fix the electrodes, and these ribs fix one of the electrodes on the high voltage side and the electrodes on the ground side. The electrodes are provided with notches so as not to come into contact with the ribs in order to ensure insulation between electrodes having different polarities.

しかし、切欠きの角部は尖っているため、角部に電界が集中し、リブに対し余分な放電をすることで電極の電位が下がり、集塵性能が下がるという問題があった。 However, since the corners of the notch are sharp, there is a problem that the electric field is concentrated on the corners and the potential of the electrode is lowered due to the extra discharge to the ribs, and the dust collection performance is lowered.

この問題を解消するため、例えば、電極の角部を曲線状に形成し、角部への電界の集中を抑制して放電し難いように構成した技術が開示されている（例えば、特許文献１参照）。 In order to solve this problem, for example, a technique is disclosed in which the corners of the electrode are formed in a curved shape to suppress the concentration of the electric field on the corners so that the discharge is difficult (for example, Patent Document 1). reference).

しかしながら、切り欠かれた電極の両端を曲線形状にすると、空気は電極の表面に沿って流れるため、電極上を流れる空気の割合が少なくなるという問題があった。 However, when both ends of the notched electrode are curved, air flows along the surface of the electrode, so that there is a problem that the proportion of air flowing on the electrode is reduced.

特開平５−３２９３９８号公報Japanese Unexamined Patent Publication No. 5-329398

本発明は、上記の問題点に鑑みなされたものであって、絶縁性を確保するとともに、空気が通過する電極の表面の面積を多くするようにした電気集塵装置を提供することを目的とする。 The present invention has been made in view of the above problems, and an object of the present invention is to provide an electrostatic precipitator in which insulation is ensured and the surface area of an electrode through which air passes is increased. To do.

本発明は、上記目的を達成するために、以下の構成によって把握される。
（１）本発明の第１の観点は、電気集塵装置であって、空気中に含まれる塵埃を帯電させる荷電部と、前記荷電部により帯電された塵埃を捕集する集塵部と、を備え、前記集塵部は、板状の高圧電極板と、板状の捕集電極板と、高圧電極板用リブと、捕集電極板用リブと、を備え、前記高圧電極板の面と前記捕集電極板の面が向き合った状態で交互に平行に配置され、前記高圧電極板は前記高圧電極板用リブに固定されるとともに、前記捕集電極板用リブとの接触を避けるための第１の切欠き部を有し、前記捕集電極板が前記捕集電極板用リブに固定されるとともに、前記高圧電極板用リブとの接触を避けるための第２の切欠き部を有し、前記第１の切欠き部及び前記第２の切欠き部の少なくとも一方の開口側のコーナー部がアール形状に形成され、対応する前記捕集電極板用リブと前記高圧電極板用リブの少なくとも一方が前記コーナー部のアール形状に沿うように形成されていることを特徴とする。 The present invention is grasped by the following configuration in order to achieve the above object.
(1) The first aspect of the present invention is an electrostatic precipitator, which comprises a charged portion that charges dust contained in the air, a dust collecting portion that collects dust charged by the charged portion, and the like. The dust collecting portion includes a plate-shaped high-pressure electrode plate, a plate-shaped collecting electrode plate, a rib for a high-pressure electrode plate, and a rib for a collecting electrode plate, and the surface of the high-pressure electrode plate. The high-pressure electrode plates are alternately arranged in parallel with the surfaces of the collection electrode plates facing each other, and the high-pressure electrode plates are fixed to the ribs for the high-pressure electrode plates and to avoid contact with the ribs for the collection electrode plates. The second notch is provided so that the collection electrode plate is fixed to the rib for the collection electrode plate and the second notch is for avoiding contact with the rib for the high pressure electrode plate. The first cutout portion and the corner portion on the opening side of at least one of the second cutout portions are formed in a rounded shape, and the corresponding ribs for the collecting electrode plate and the ribs for the high pressure electrode plate are formed. At least one of the corner portions is formed so as to follow the rounded shape of the corner portion.

本発明によれば、集塵部の電極が放電を起こさずに、空気がリブに沿って流れることで、電極の表面上を流れる時間を長くし、塵埃を出来るだけ捕集できるようにした電気集塵装置を提供することができる。 According to the present invention, air flows along the ribs without causing an electric discharge in the electrode of the dust collecting part, so that the time flowing on the surface of the electrode is lengthened and the dust can be collected as much as possible. A dust collector can be provided.

本発明の実施形態に係る電気集塵装置を分解して示す斜視図である。It is a perspective view which shows disassembled the electrostatic precipitator which concerns on embodiment of this invention. 本発明の実施形態に係る集塵部の外観を示す斜視図である。It is a perspective view which shows the appearance of the dust collecting part which concerns on embodiment of this invention. 本発明の実施形態に係る集塵部の内部構造を示す斜視図である。It is a perspective view which shows the internal structure of the dust collecting part which concerns on embodiment of this invention. 本発明の実施形態に係る集塵部のコレクタシートとリブとの関係を示す断面図であって、（ａ）はコレクタシート（高圧電極板）と高圧電極板用リブとの関係を、（ｂ）はコレクタシート（捕集電極板）と捕集電極板用リブとの関係を示す。It is sectional drawing which shows the relationship between the collector sheet and the rib of the dust collecting part which concerns on embodiment of this invention, (a) is the relationship between a collector sheet (high-voltage electrode plate) and a rib for a high-voltage electrode plate, (b). ) Indicates the relationship between the collector sheet (collection electrode plate) and the rib for the collection electrode plate. 従来の電気集塵装置に係る集塵部のコレクタシート（高圧電極板）を示す平面図である。It is a top view which shows the collector sheet (high voltage electrode plate) of the dust collecting part which concerns on the conventional electrostatic precipitator. 本発明の実施形態に係る集塵部のコレクタシート（高圧電極板）を示す平面図である。It is a top view which shows the collector sheet (high voltage electrode plate) of the dust collecting part which concerns on embodiment of this invention. 本発明の実施形態に係る電気集塵装置における集塵部のコレクタシート（高圧電極板）について、放電特性を説明するグラフである。It is a graph explaining the discharge characteristic about the collector sheet (high voltage electrode plate) of the dust collecting part in the electrostatic precipitator which concerns on embodiment of this invention. 本発明の実施形態に係る電気集塵装置におけるリブを説明する図であって、（ａ）はコレクタシートの切欠きと従来のリブの間の隙間を説明する図、（ｂ）はコレクタシートの切欠きとの間の隙間を解消したリブを説明する図である。It is a figure explaining the rib in the electrostatic precipitator which concerns on embodiment of this invention, (a) is the figure explaining the gap between the notch of the collector sheet and the conventional rib, (b) is the figure of the collector sheet. It is a figure explaining the rib which eliminated the gap with the notch.

以下、本発明を実施するための形態（以下、「実施形態」という）を、添付図面に基づいて詳細に説明する。なお、実施形態の説明の全体を通して同じ要素には同じ番号を付している。 Hereinafter, embodiments for carrying out the present invention (hereinafter, referred to as “embodiments”) will be described in detail with reference to the accompanying drawings. The same elements are numbered the same throughout the description of the embodiment.

（電気集塵装置の全体構成）
まず、図１を参照しつつ、電気集塵装置１の全体構成について、説明する。図１に示すように、外部ケース前面部２と外部ケース背面部３は接合されており、その内部には、内部ケース前面部５を挟んで、荷電部１ＡとしてのＧＮＤプレート４とＨＶプレート６が配置されている。なお、図１では外部ケース前面部２と外部ケース背面部３の内部にあるはずの部品、荷電部１Ａ、集塵部１Ｂを説明の便宜上、外部ケース前面部２と外部ケース背面部３の外に出して分解しているが、実際は外部ケース前面部２と外部ケース背面部３の内部に収容されている。 (Overall configuration of electrostatic precipitator)
First, the overall configuration of the electrostatic precipitator 1 will be described with reference to FIG. As shown in FIG. 1, the outer case front portion 2 and the outer case back portion 3 are joined to each other, and the GND plate 4 and the HV plate 6 as the charged portion 1A sandwich the inner case front portion 5 inside. Is placed. In FIG. 1, for convenience of explanation, the parts, the charged portion 1A, and the dust collecting portion 1B that should be inside the outer case front portion 2 and the outer case back portion 3 are outside the outer case front portion 2 and the outer case back portion 3. Although it is disassembled, it is actually housed inside the outer case front portion 2 and the outer case back portion 3.

内部ケース背面部７にはリブ１４が縦方向に延在して設けられており、集塵部１ＢとしてのコレクタシートであるＨＶ（Hi Voltage）シート８（高圧電極板）が高圧電極板用リブ１４ａに固定され、ＧＮＤシート１１（捕集電極板）が捕集電極板用リブ１４ｂに固定されている。ＨＶシート８の図中右側にはＨＶ電極９及びＨＶ電極カバー１０が設けられている。ＧＮＤシート１１の図中左側にはＧＮＤ電極１２及びＧＮＤ電極カバー１３が設けられている。なお、以下では、リブについて説明するときはリブ１４と、個別に説明するときは高圧電極板用リブ１４ａ及び捕集電極板用リブ１４ｂと表示する。なお、ＨＶシート８とＧＮＤシート１１の間に電圧を印加することで、ＨＶシート８とＧＮＤシート１１の間には静電力が形成される。コレクタシートは板状に形成されている。 Ribs 14 are provided on the back surface portion 7 of the inner case so as to extend in the vertical direction, and the HV (Hi Voltage) sheet 8 (high voltage electrode plate), which is a collector sheet as the dust collecting portion 1B, is a rib for the high voltage electrode plate. It is fixed to 14a, and the GND sheet 11 (collection electrode plate) is fixed to the collection electrode plate rib 14b. The HV electrode 9 and the HV electrode cover 10 are provided on the right side of the HV sheet 8 in the drawing. A GND electrode 12 and a GND electrode cover 13 are provided on the left side of the GND sheet 11 in the drawing. In the following description, the ribs will be referred to as ribs 14, and the ribs will be referred to as high-voltage electrode plate ribs 14a and collection electrode plate ribs 14b when individually described. By applying a voltage between the HV sheet 8 and the GND sheet 11, an electrostatic force is formed between the HV sheet 8 and the GND sheet 11. The collector sheet is formed in a plate shape.

通風方向は、外部ケース前面部２から、外部ケース背面部３への向きである。電気集塵装置１に流入した空気に含まれている粉塵等の粒子は、荷電部１Ａに配置されているＧＮＤプレート４とＨＶプレート６間の放電によって帯電する。そして、集塵部１Ｂに配置されているＨＶシート８及びＧＮＤシート１１の間に形成された静電力によって、荷電部１Ａで荷電された粒子はＧＮＤシート１１に捕集される。 The ventilation direction is from the front surface portion 2 of the outer case to the back surface portion 3 of the outer case. Particles such as dust contained in the air flowing into the electrostatic precipitator 1 are charged by the electric discharge between the GND plate 4 and the HV plate 6 arranged in the charging unit 1A. Then, the particles charged by the charged portion 1A are collected by the GND sheet 11 due to the electrostatic force formed between the HV sheet 8 and the GND sheet 11 arranged in the dust collecting portion 1B.

集塵部１Ｂについて、図２、図３及び図４を参照して、さらに説明する。図２は、電気集塵装置１の集塵部１Ｂの外観を、図３は集塵部１Ｂの内部構造を示している。図２に示すように、集塵部１Ｂは、外部ケース背面部３にＨＶシート８とＧＮＤシート１１が図中左右方向にそれぞれの長手方向がくるように配置され、図中上下方向にＨＶシート８の面８ｂとＧＮＤシート１１の面１１ａ、およびＨＶシート８の面８ａとＧＮＤシート１１の面１１ｂのそれぞれが向き合うように交互に積層されて配置されている。外部ケース背面部３を外すと、図３に示すように、その内部には、内部ケース背面部７から図中前側に突出するようにリブ１４が設けられている。 The dust collecting unit 1B will be further described with reference to FIGS. 2, 3 and 4. FIG. 2 shows the appearance of the dust collecting unit 1B of the electrostatic precipitator 1, and FIG. 3 shows the internal structure of the dust collecting unit 1B. As shown in FIG. 2, in the dust collecting portion 1B, the HV sheet 8 and the GND sheet 11 are arranged on the back surface portion 3 of the outer case so that their respective longitudinal directions are in the left-right direction in the drawing, and the HV sheet is arranged in the vertical direction in the drawing. The surface 8b of 8 and the surface 11a of the GND sheet 11 and the surface 8a of the HV sheet 8 and the surface 11b of the GND sheet 11 are alternately laminated and arranged so as to face each other. When the outer case back surface 3 is removed, as shown in FIG. 3, ribs 14 are provided inside the outer case so as to project from the inner case back surface 7 toward the front side in the drawing.

リブ１４は、ＨＶシート８を固定する高圧電極板用リブ１４ａと、ＧＮＤシート１１を固定する捕集電極板用リブ１４ｂとが交互に配置されており、ここでは、高圧電極板用リブ１４ａが３つ、捕集電極板用リブ１４ｂが４つ設けられた例を示している。ＨＶシート８の図中右側の端部にはＨＶ電極９が、ＧＮＤシート１１の図中左側の端部にはＧＮＤ電極１２が当接している。 In the rib 14, the rib 14a for the high-voltage electrode plate for fixing the HV sheet 8 and the rib 14b for the collecting electrode plate for fixing the GND sheet 11 are alternately arranged, and here, the rib 14a for the high-voltage electrode plate is arranged. An example is shown in which three ribs 14b for collecting electrode plates are provided. The HV electrode 9 is in contact with the right end of the HV sheet 8 in the drawing, and the GND electrode 12 is in contact with the left end of the GND sheet 11 in the drawing.

ここで、ＨＶシート８及びＧＮＤシート１１と、高圧電極板用リブ１４ａ及び捕集電極板用リブ１４ｂとの固定の関係について、図４を用いて説明する。図４（ａ）は、ＨＶシート８を固定する高圧電極板用リブ１４ａを上下方向で切断し左右方向から見た時の断面図である。図４（ｂ）は、ＧＮＤシート１１を固定する捕集電極板用リブ１４ｂを上下方向で切断し左右方向から見た時の断面図である。図４（ａ）に示すように、ＨＶシート８が高圧電極板用リブ１４ａのスリット１４ａ１に挿し込まれることで固定されており（図中、実線表示）、ＧＮＤシート１１は第２の切欠き部Ｃｂによってリブ１４ａと接しないため高圧電極板用リブ１４ａに固定されない（図中、破線表示）ようになっている。他方、図４（ｂ）に示すように、ＧＮＤシート１１が捕集電極板用リブ１４ｂのスリット１４ｂ１に挿し込まれることで固定されており（図中、実線表示）、ＨＶシート８は第１の切欠き部Ｃａによってリブ１４ｂと接しないため捕集電極板用リブ１４ｂに固定されない（図中、破線表示）ようになっている。各シートが電位の極性の異なるリブ１４によって固定されない構造については後述する。 Here, the fixing relationship between the HV sheet 8 and the GND sheet 11 and the ribs 14a for the high-voltage electrode plate and the ribs 14b for the collection electrode plate will be described with reference to FIG. FIG. 4A is a cross-sectional view of the rib 14a for the high-voltage electrode plate fixing the HV sheet 8 when cut in the vertical direction and viewed from the horizontal direction. FIG. 4B is a cross-sectional view of the collecting electrode plate rib 14b fixing the GND sheet 11 when cut in the vertical direction and viewed from the horizontal direction. As shown in FIG. 4A, the HV sheet 8 is fixed by being inserted into the slit 14a1 of the rib 14a for the high-voltage electrode plate (solid line in the figure), and the GND sheet 11 has a second notch. Since the portion Cb does not come into contact with the rib 14a, it is not fixed to the rib 14a for the high-voltage electrode plate (indicated by a broken line in the figure). On the other hand, as shown in FIG. 4 (b), the GND sheet 11 is fixed by being inserted into the slit 14b1 of the collection electrode plate rib 14b (solid line in the figure), and the HV sheet 8 is the first. Since it does not come into contact with the rib 14b due to the notch Ca of the above, it is not fixed to the rib 14b for the collecting electrode plate (indicated by a broken line in the figure). The structure in which each sheet is not fixed by the ribs 14 having different potential polarities will be described later.

（コレクタシート）
次に、コレクタシート２０について、詳しく説明する。コレクタシート２０は、ＨＶシート８（高圧電極板）と、ＧＮＤシート１１（捕集電極板）の一対となっている。なお、ＨＶシート８とＧＮＤシート１１は共に左右非対称となっている。両者の形状や大きさは同一であり、左右を逆にした後に反転させた形で対向するように配置される。なお、以下では、各シートをまとめて説明する際は「コレクタシート」と呼び、個別に説明する際は「ＨＶシート」又は「ＧＮＤシート」と呼ぶ。 (Collector sheet)
Next, the collector sheet 20 will be described in detail. The collector sheet 20 is a pair of an HV sheet 8 (high voltage electrode plate) and a GND sheet 11 (collection electrode plate). Both the HV sheet 8 and the GND sheet 11 are asymmetrical. Both have the same shape and size, and are arranged so as to face each other in an inverted form after the left and right sides are reversed. In the following, when each sheet is described collectively, it is referred to as a "collector sheet", and when it is described individually, it is referred to as an "HV sheet" or a "GND sheet".

図５は、従来のコレクタシート２０を示している。このコレクタシート２０は矩形状のシートより形成されており、シートの短手方向両側には電気集塵装置１に取り付ける際に極性の異なるリブ１４との接触を避けるための切欠き部Ｃが設けられている。ここでは、短手方向の一側に４か所、他側に３か所の切欠き部Ｃを設けた例を示している。塵や埃が多く付着する付着部（長さＬ２で表示する部分）の両端には、端部（長さＬ３で表示する部分）が設けられており、図中下側の端部には電極が貼り付けられる。 FIG. 5 shows a conventional collector sheet 20. The collector sheet 20 is formed of a rectangular sheet, and notches C are provided on both sides of the sheet in the lateral direction to avoid contact with ribs 14 having different polarities when attached to the electrostatic precipitator 1. Has been done. Here, an example is shown in which notches C are provided at four locations on one side in the lateral direction and at three locations on the other side. Ends (parts indicated by length L3) are provided at both ends of the attachment portion (part indicated by length L2) to which a large amount of dust or dust adheres, and electrodes are provided at the lower end in the figure. Is pasted.

ここで、前述したように、２段式の電気集塵装置１の集塵部１Ｂのコレクタシート２０は、静電界を形成して集塵するものであるが、コレクタシート２０の切欠き部Ｃの角部からリブ１４に対して放電が発生すると、放電電流によりシート電位が低下し、所定の電界強度が得られず、集塵性能が低下してしまうという問題があった。これに対して、図６のように放電を回避するために、コレクタシート２０の電界が集中する部分をＲ形状（円弧状）に形成するという技術があり、コレクタシート２０のコーナー部２１をＲ形状（円弧状）化することが行われていた。 Here, as described above, the collector sheet 20 of the dust collecting portion 1B of the two-stage electrostatic precipitator 1 forms an electrostatic field to collect dust, but the notch portion C of the collector sheet 20 is used. When a discharge is generated from the corner portion of the rib 14 to the rib 14, the sheet potential is lowered due to the discharge current, a predetermined electric field strength cannot be obtained, and there is a problem that the dust collecting performance is lowered. On the other hand, as shown in FIG. 6, in order to avoid electric discharge, there is a technique of forming a portion of the collector sheet 20 where the electric field is concentrated into an R shape (arc shape), and the corner portion 21 of the collector sheet 20 is rounded. It was made into a shape (arc shape).

一方で、ＨＶシート８とＧＮＤシートと１１の間の絶縁を確保するために、両シートに切欠きＣ（第１の切欠き部Ｃａと第２の切欠き部Ｃｂ）を設けている。ＨＶシート８は高圧電極板用リブ１４ａに固定され、ＧＮＤシート１１は捕集電極板用リブ１４ｂに固定されている。通常、この高圧電極板用リブ１４ａと捕集電極板用リブ１４ｂのそれぞれの断面形状は、略長方形となっている。 On the other hand, in order to secure the insulation between the HV sheet 8 and the GND sheet and 11, both sheets are provided with notches C (first notch Ca and second notch Cb). The HV sheet 8 is fixed to the rib 14a for the high-voltage electrode plate, and the GND sheet 11 is fixed to the rib 14b for the collection electrode plate. Normally, the cross-sectional shapes of the high-voltage electrode plate rib 14a and the collection electrode plate rib 14b are substantially rectangular.

切欠きＣのコーナー部２１のＲ形状は、その曲率が大きければ大きいほど放電しにくくなるが、他方でコレクタシート２０の面積が小さくなり、ＨＶシート８とＧＮＤシート１１との間に電界を形成する面積が小さくなる。 The larger the curvature of the corner portion 21 of the notch C, the more difficult it is to discharge, but on the other hand, the area of the collector sheet 20 becomes smaller and an electric field is formed between the HV sheet 8 and the GND sheet 11. The area to be discharged becomes smaller.

しかし、Ｒ形状を大きくすると電気集塵装置１の大型化を招いてしまうとともに、切欠きＣとリブ１４との隙間も大きくなる。これにより、ＨＶシート８とＧＮＤシート１１との間を通過する空気のうち、電界が生じない切欠きＣの上方と下方のそれぞれの空間を通過する割合が大きくなるという理由から、かえって集塵性能の低下を招いてしまう。そこで、本実施形態では、図６に示すように、コレクタシート２０の切欠き部Ｃの開口部のＲ形状を大きくするとともに、図８に示すように、コレクタシート２０を固定するリブ１４の断面形状を、コレクタシート２０の切欠き部Ｃの開口部のＲ形状に沿った形にすることで、上述した電界のない部分を通過する割合が大きくなることによる集塵性能の低下を来さないようにするものである。 However, if the R shape is increased, the size of the electrostatic precipitator 1 is increased, and the gap between the notch C and the rib 14 is also increased. As a result, of the air passing between the HV sheet 8 and the GND sheet 11, the proportion of the air passing through the spaces above and below the notch C where the electric field is not generated becomes large, so that the dust collection performance is rather large. Will lead to a decrease in. Therefore, in the present embodiment, as shown in FIG. 6, the R shape of the opening of the notch C of the collector sheet 20 is increased, and as shown in FIG. 8, the cross section of the rib 14 for fixing the collector sheet 20 is increased. By making the shape follow the R shape of the opening of the notch C of the collector sheet 20, the dust collection performance does not deteriorate due to the increase in the ratio of passing through the above-mentioned portion without an electric field. It is something to do.

まず、図７を参照して、切欠きＣの開口部のＲの大きさが集塵性能に影響するリブ１４に対する放電時に流れる放電電流をどのように変化させるかについて、説明する。 First, with reference to FIG. 7, how the size of R of the opening of the notch C changes the discharge current flowing during discharge with respect to the rib 14 which affects the dust collection performance will be described.

切欠きＣの開口部のＲの大きさの影響について、次のとおり試験を行った。試験に供したコレクタシート２０は、次のようなものである。ＨＶシート８としては、体積低効率ρｖ＝３＊１０の９乗Ωｃｍにより構成されたシートを用意した。ＨＶシート８の形状は、矩形状（長辺８４ｍｍ、短辺３４ｍｍ、厚み０．４ｍｍ）とし、その四隅のうち一隅に電極を貼り付ける突起部を設けた。そして、突起部からみて短辺側の反対の一隅には試験対象のコーナーを設け、突起部及びコーナーからみて長辺側の反対の短辺には、その二隅を覆うように、絶縁体としてビニルテープを貼り付けた。 The influence of the size of R of the opening of the notch C was tested as follows. The collector sheet 20 used for the test is as follows. As the HV sheet 8, a sheet composed of a volume low efficiency ρv = 3 * 10 9th power Ωcm was prepared. The shape of the HV sheet 8 is rectangular (long side 84 mm, short side 34 mm, thickness 0.4 mm), and protrusions for attaching electrodes are provided at one of the four corners. Then, a corner to be tested is provided in the opposite corner on the short side when viewed from the protrusion, and as an insulator so as to cover the two corners on the opposite short side on the long side when viewed from the protrusion and the corner. A vinyl tape was attached.

これに対し、ＧＮＤシート１１としては、体積低効率ρｖ＝２００Ωｃｍにより構成されたシートを用意した。ＧＮＤシート１１の形状は、同じく矩形状（長辺２１６ｍｍ、短辺３４ｍｍ、厚み０．４ｍｍ）とし、その四隅のうちＨＶシート８とは長辺側の反対の一隅に電極を貼り付ける突起部を設けた。ＧＮＤシート１１は加工せずに、コーナーを設けないでそのまま使用した。 On the other hand, as the GND sheet 11, a sheet having a volume low efficiency ρv = 200Ωcm was prepared. The shape of the GND sheet 11 is also rectangular (long side 216 mm, short side 34 mm, thickness 0.4 mm), and a protrusion for attaching an electrode is provided at one of the four corners opposite to the HV sheet 8 on the long side. Provided. The GND sheet 11 was used as it was without processing and without providing corners.

以上のように用意したＨＶシート８とＧＮＤシート１１を用い、以下の手順で試験を行った。
（１）ＨＶシート８のコーナー２１がＧＮＤシート１１の長辺と距離２ｍｍで対向するように、配置する。この際、ＨＶシート８のビニルテープはＧＮＤシート１１に面している。
（２）ＨＶシート８及びＧＮＤシート１１のそれぞれの突起部に電極を貼りつけ、両シート間に高圧電源により、電圧を印加する。
（３）ＧＮＤシート１１からの戻りの電流を、絶縁抵抗計の電流測定モードで測定する。
（４）放電により大きく電流が変化する際の印加電圧を求める。 Using the HV sheet 8 and the GND sheet 11 prepared as described above, the test was conducted according to the following procedure.
(1) The corner 21 of the HV sheet 8 is arranged so as to face the long side of the GND sheet 11 at a distance of 2 mm. At this time, the vinyl tape of the HV sheet 8 faces the GND sheet 11.
(2) Electrodes are attached to the protrusions of the HV sheet 8 and the GND sheet 11, and a voltage is applied between the two sheets by a high-voltage power supply.
(3) The return current from the GND sheet 11 is measured in the current measurement mode of the insulation resistance tester.
(4) Obtain the applied voltage when the current changes significantly due to discharge.

測定器は、以下のものを用いた。
・高圧電源：松定プレシジョン製（６ｋＶ／０．５ｍＡ ｍａｘ），正極、Ｖｍｏｎｉｔｏｒ、Ｉｍｏｎｉｔｏｒ付入力２４ＶＤＣ
・オシロスコープ：テクシオテクノロジー製ＤＣＳ一２２０４Ｅ
・電流測定：ＹＨＰ製絶縁抵抗計ハイレジスタンスメータ４３２９Ａ The following measuring instruments were used.
・ High-voltage power supply: Made by Matsusada Precision (6kV / 0.5mA max), positive electrode, Vunitor, input 24VDC with Immunotor
-Oscilloscope: Texio Technology DCS 12204E
-Current measurement: YHP insulation resistance tester high resistance meter 4329A

以上の準備をもとに、ＨＶシート８に設けたコーナー２１のＲを１〜１５ｍｍの範囲で変化させて、放電電流ｉが５０ｎＡとなる印加電圧Ｖｉの変化を測定した。結果は、図７に示すとおりである。なお、試験した際の条件は、温度２６℃、湿度５０％である。 Based on the above preparation, the R of the corner 21 provided on the HV sheet 8 was changed in the range of 1 to 15 mm, and the change in the applied voltage Vi at which the discharge current i was 50 nA was measured. The results are shown in FIG. The conditions at the time of the test were a temperature of 26 ° C. and a humidity of 50%.

図７に示すように、Ｒが大きくなるにつれて、リブ１４に対し放電を開始する印加電圧Ｖｉは上昇していき、Ｒが１ｍｍのときと比較し、Ｒが７ｍｍになると印加電圧Ｖｉを約１ｋＶ上昇させることができる。そして、Ｒが１０ｍｍを超えると印加電圧Ｖｉはほぼ一定となる。このように、印加電圧Ｖｉを上昇させる効果はＲが１ｍｍの場合より順次得られるが、約１ｋＶ上昇させるという顕著な効果を得る観点からは、Ｒは７ｍｍから１０ｍｍの範囲とすることが好ましい。 As shown in FIG. 7, as R increases, the applied voltage Vi that starts discharging to the rib 14 increases, and when R becomes 7 mm, the applied voltage Vi increases by about 1 kV as compared with the case where R is 1 mm. Can be raised. When R exceeds 10 mm, the applied voltage Vi becomes almost constant. As described above, the effect of increasing the applied voltage Vi is sequentially obtained from the case where R is 1 mm, but from the viewpoint of obtaining a remarkable effect of increasing R by about 1 kV, R is preferably in the range of 7 mm to 10 mm.

次に、図８並びに適宜図５及び図６を参照して、コレクタシート２０を固定するリブの断面形状について、説明する。 Next, the cross-sectional shape of the rib for fixing the collector sheet 20 will be described with reference to FIG. 8 and FIGS. 5 and 6 as appropriate.

図５又は図６に示したコレクタシート２０の主な諸元は、例えば次のとおりである。もちろん、本実施形態は、これらの諸元に限られるものではない。
・全体長さＬ１：１８８ｍｍ
・矩形部分の長さＬ２：１６２ｍｍ
・両端部分の長さＬ３：１３ｍｍ
・幅Ｗ１：１８．５ｍｍ
・切欠き間のピッチＰ：２３ｍｍ（×６ピッチ＝１３８ｍｍ）
・切欠きの幅Ｃｌ：６ｍｍ
・切欠きの深さＣｗ：７ｍｍ The main specifications of the collector sheet 20 shown in FIG. 5 or FIG. 6 are as follows, for example. Of course, this embodiment is not limited to these specifications.
・ Overall length L1: 188 mm
・ Length of rectangular part L2: 162mm
・ Length of both ends L3: 13mm
・ Width W1: 18.5 mm
・ Pitch between notches P: 23 mm (× 6 pitch = 138 mm)
・ Notch width Cl: 6 mm
・ Depth of notch Cw: 7mm

コレクタシート２０を上記の諸元で設定して、コレクタシート２０の切欠き部Ｃの開口部のＲを例えば７ｍｍとし、リブ１４の断面形状を長方形のままとしたとき、図８（ａ）でハッチングした切欠きＣとリブ１４の間の片側の隙間の面積は、１０．５ｍｍ２となる。これをコレクタシート２０全体でみると、１０．５ｍｍ２×２（リブの両側）×７（切欠きの総数）×２（ＨＶシート８とＧＮＤシート１１の一対）ということで、コレクタシート１組の隙間の総面積は、２９４ｍｍ２となる。コレクタシート２０の全有効シート面積は、２４０９ｍｍ２であるので、隙間の総面積は１２．２％に相当する。 When the collector sheet 20 is set according to the above specifications, the radius of the opening of the notch C of the collector sheet 20 is set to, for example, 7 mm, and the cross-sectional shape of the rib 14 remains rectangular, FIG. 8 (a) shows. The area of the gap on one side between the hatched notch C and the rib 14 is 10.5 mm 2 . Looking at this for the entire collector sheet 20, 10.5 mm 2 x 2 (both sides of the rib) x 7 (total number of notches) x 2 (a pair of HV sheet 8 and GND sheet 11), so one set of collector sheets The total area of the gap is 294 mm 2 . Since the total effective sheet area of the collector sheet 20 is 2409 mm 2 , the total area of the gap corresponds to 12.2%.

ここで、図８（ｂ）に示すように、リブ１４の断面形状を切欠きＣのＲ７ｍｍの形状に沿った形に形成すれば、電界がない部分を通過していた空気が、リブ１４によって電界のあるコレクタシート２０上に強制的に誘導されるため、集塵性能を上昇させることができる。 Here, as shown in FIG. 8B, if the cross-sectional shape of the rib 14 is formed to follow the shape of R7 mm of the notch C, the air passing through the portion where there is no electric field is removed by the rib 14. Since it is forcibly guided on the collector sheet 20 having an electric field, the dust collection performance can be improved.

なお、リブ１４の断面が大きくなることからリブ１４の剛性が高まる共に、リブ同士を連結することで強度を保つ場合に生じるリーク電流を抑制することも可能となる。 Since the cross section of the rib 14 is increased, the rigidity of the rib 14 is increased, and it is also possible to suppress the leakage current generated when the strength is maintained by connecting the ribs to each other.

以上、本発明の好ましい実施形態について詳述したが、本発明は上述した実施形態に限定されるものではなく、特許請求の範囲に記載された本発明の要旨の範囲内において、種々の変形、変更が可能である。 Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications and modifications are made within the scope of the gist of the present invention described in the claims. It can be changed.

１…電気集塵装置
１Ａ…荷電部
１Ｂ…集塵部
２…外部ケース前面部
３…外部ケース背面部
４…ＧＮＤプレート（荷電部）
５…内部ケース前面部
６…ＨＶプレート（荷電部）
７…内部ケース背面部
８…ＨＶシート（コレクタシート。集塵部の高圧電極板）
９…ＨＶ電極
１０…ＨＶ電極カバー
１１…ＧＮＤシート（コレクタシート。集塵部の捕集電極板）
１２…ＧＮＤ電極
１３…ＧＮＤ電極カバー
１４…リブ
１４ａ…高圧電極板用リブ
１４ｂ…捕集電極板用リブ
Ｃ…切欠き
Ｃｌ…切欠きの幅
Ｃｗ…切欠きの深さ
Ｒ１…Ｒ形状（１ｍｍ）
Ｒ７…Ｒ形状（７ｍｍ） 1 ... Electrostatic precipitator 1A ... Charged part 1B ... Dust collecting part 2 ... External case front part 3 ... External case back part 4 ... GND plate (charged part)
5 ... Inner case front part 6 ... HV plate (charged part)
7 ... Inner case back surface 8 ... HV sheet (collector sheet. High-pressure electrode plate for dust collecting part)
9 ... HV electrode 10 ... HV electrode cover 11 ... GND sheet (collector sheet. Dust collecting electrode plate)
12 ... GND electrode 13 ... GND electrode cover 14 ... Rib 14a ... Rib 14b for high-voltage electrode plate ... Rib C for collection electrode plate C ... Notch Cl ... Notch width Cw ... Notch depth R1 ... R shape (1 mm) )
R7 ... R shape (7 mm)

Claims (1)

空気中に含まれる塵埃を帯電させる荷電部と、
前記荷電部により帯電された塵埃を捕集する集塵部と、を備え、
前記集塵部は、板状の高圧電極板と、板状の捕集電極板と、高圧電極板用リブと、捕集電極板用リブと、を備え、
前記高圧電極板の面と前記捕集電極板の面が向き合った状態で交互に平行に配置され、
前記高圧電極板は前記高圧電極板用リブに固定されるとともに、前記捕集電極板用リブとの接触を避けるための第１の切欠き部を有し、
前記捕集電極板が前記捕集電極板用リブに固定されるとともに、前記高圧電極板用リブとの接触を避けるための第２の切欠き部を有し、
前記第１の切欠き部及び前記第２の切欠き部の少なくとも一方の開口側のコーナー部がアール形状に形成され、対応する前記捕集電極板用リブと前記高圧電極板用リブの少なくとも一方が前記コーナー部のアール形状に沿うように形成されていることを特徴とする電気集塵装置。 A charged part that charges the dust contained in the air,
A dust collecting unit for collecting dust charged by the charged unit is provided.
The dust collecting portion includes a plate-shaped high-voltage electrode plate, a plate-shaped collecting electrode plate, a rib for a high-voltage electrode plate, and a rib for a collecting electrode plate.
The surfaces of the high-voltage electrode plate and the surface of the collection electrode plate are alternately arranged in parallel with each other facing each other.
The high-voltage electrode plate is fixed to the rib for the high-voltage electrode plate and has a first notch portion for avoiding contact with the rib for the collection electrode plate.
The collection electrode plate is fixed to the collection electrode plate rib and has a second notch portion for avoiding contact with the high voltage electrode plate rib.
A corner portion on the opening side of at least one of the first notch and the second notch is formed in a rounded shape, and at least one of the corresponding rib for the collecting electrode plate and the rib for the high voltage electrode plate. Is formed so as to follow the rounded shape of the corner portion.
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