JP2009045604A - Dust collector - Google Patents

Dust collector Download PDF

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JP2009045604A
JP2009045604A JP2007216747A JP2007216747A JP2009045604A JP 2009045604 A JP2009045604 A JP 2009045604A JP 2007216747 A JP2007216747 A JP 2007216747A JP 2007216747 A JP2007216747 A JP 2007216747A JP 2009045604 A JP2009045604 A JP 2009045604A
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corner
electrode
vent hole
wall surface
dust
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JP4941173B2 (en
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Toshio Tanaka
利夫 田中
Ryuji Akiyama
竜司 秋山
Kanji Mogi
完治 茂木
Toshiharu Haruna
俊治 春名
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Daikin Industries Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/50Improvements relating to the production of bulk chemicals
    • Y02P20/52Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts

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Abstract

<P>PROBLEM TO BE SOLVED: To make uniform the intensity of an electric field formed between a dust collecting electrode and a counter electrode in a dust collector in which dust collection is performed by applying a potential difference between the dust collecting electrode and the counter electrode. <P>SOLUTION: The dust collecting electrode (40) is formed in a lattice form having many vent holes (46). A protruded member (52) as a high-voltage electrode (50) is inserted into each vent hole (46). The corner of the inside wall surface of the vent hole (46) has an arc surface with a center of curvature coinciding with the corner of the protruded member (52). The distance between the inside wall surface of each vent hole (46) and the corresponding protruded member (52) has a constant value d along the entire vent hole (46). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、集塵装置に関し、特に、集塵用の電極の構造に係るものである。   The present invention relates to a dust collector, and particularly relates to a structure of a dust collecting electrode.

従来より、電気的な引力を利用して空気等に含まれる粉塵を捕集する電気式の集塵装置が知られている。例えば、特許文献1には、矩形断面の通気孔が多数形成された格子状の集塵電極と、集塵電極の通気孔へ1つずつ挿入される突起部が形成された対向電極とを備える集塵装置が開示されている。この集塵装置において、対向極の突起部は、その断面形状が矩形状となっており、その側面が通気孔の内壁面と向かい合っている。集塵電極と対向電極の間に電位差を付与すると、通気孔の内壁面と突起部の表面との間の空間に電界が形成される。そのため、通気孔を流れる気体中の粒子は、通気孔の内壁に引き寄せられて捕捉される。
登録実用新案第3033859号公報
2. Description of the Related Art Conventionally, an electric dust collector that collects dust contained in air or the like using an electric attractive force is known. For example, Patent Document 1 includes a grid-shaped dust collection electrode in which a large number of rectangular cross-sectional ventilation holes are formed, and a counter electrode in which protrusions that are inserted one by one into the ventilation holes of the dust collection electrode are formed. A dust collector is disclosed. In this dust collector, the protruding portion of the counter electrode has a rectangular cross-sectional shape, and its side surface faces the inner wall surface of the vent hole. When a potential difference is applied between the dust collection electrode and the counter electrode, an electric field is formed in the space between the inner wall surface of the vent hole and the surface of the protrusion. Therefore, the particles in the gas flowing through the vent hole are attracted to the inner wall of the vent hole and captured.
Registered Utility Model No. 3033859

ところが、上記従来の集塵装置では、通気孔の内壁面と突起部の表面との間の空間に形成される電界強度が均一でなく、そのため通気孔の内壁面に捕捉される塵埃の量が場所によって相違するという問題があった。ここでは、この問題点について、図17を参照しながら説明する。   However, in the above conventional dust collector, the electric field strength formed in the space between the inner wall surface of the vent hole and the surface of the protrusion is not uniform, so the amount of dust trapped on the inner wall surface of the vent hole is small. There was a problem of differences depending on the location. Here, this problem will be described with reference to FIG.

突起部(102)の側面と、通気孔(101)の内壁面のうち突起部(102)の側面と向かい合った部分である対面部(103)との距離は、一定の値Lとなっている。そのため、この対面部(103)と突起部(102)との間に形成される電界の強度は一様となり、各対面部(103)では単位面積当たりに付着する塵埃の量が概ね一定となる。   The distance between the side surface of the projecting portion (102) and the facing portion (103) that is the portion of the inner wall surface of the vent hole (101) facing the side surface of the projecting portion (102) is a constant value L. . Therefore, the intensity of the electric field formed between the facing portion (103) and the protruding portion (102) is uniform, and the amount of dust adhering per unit area is substantially constant at each facing portion (103). .

ところが、通気孔(101)の内壁面のうち突起部(102)と対面しない非対面部(104)(即ち、図17においてハッチングを付した部分)と突起部(102)との距離L'は、対面部(103)と突起部(102)との距離Lよりも長くなる。このため、非対面部(104)と突起部(102)の間に形成される電界の強度は、対面部(103)と突起部(102)の間に形成される電界の強度に比べて弱くなる。従って、この非対面部(104)では、突起部(102)から離れた部分ほど付着する塵埃の量が少なくなる。そして、非対面部(104)における単位面積当たりの塵埃の付着量は、対面部(103)における単位面積当たりの塵埃の付着量に比べて少なくなる。その結果、通気孔(101)の内壁面の全体を有効に利用して塵埃を捕集することができなくなり、集塵装置の性能を充分に発揮させることができなかった。   However, the distance L ′ between the protrusion (102) and the non-facing portion (104) that does not face the protrusion (102) on the inner wall surface of the vent hole (101) and the protrusion (102) is It becomes longer than the distance L between the facing portion (103) and the protruding portion (102). For this reason, the strength of the electric field formed between the non-facing portion (104) and the protruding portion (102) is weaker than the strength of the electric field formed between the facing portion (103) and the protruding portion (102). Become. Therefore, in the non-facing portion (104), the amount of dust adhering to the portion farther from the protrusion (102) becomes smaller. Further, the amount of dust attached per unit area on the non-facing portion (104) is smaller than the amount of dust attached per unit area on the facing portion (103). As a result, dust cannot be collected by effectively using the entire inner wall surface of the vent hole (101), and the performance of the dust collector could not be fully exhibited.

本発明は、かかる点に鑑みてなされたものであり、その目的は、集塵電極と対向電極の間に形成される電界の強度を平均化することによって、集塵装置の性能を充分に発揮させることにある。   The present invention has been made in view of such a point, and the object thereof is to fully demonstrate the performance of the dust collector by averaging the strength of the electric field formed between the dust collecting electrode and the counter electrode. There is to make it.

第1の発明は、被処理気体を流すための通気孔(46)が形成された集塵電極(40)と、該集塵電極(40)の通気孔(46)に挿通される突起部(52)が形成された対向電極(50)とを備え、上記集塵電極(40)と対向電極(50)の間に電位差を与えることによって、被処理気体中の帯電した塵埃を上記通気孔(46)の壁面に付着させて捕集する集塵装置を対象とする。そして、上記集塵電極(40)の通気孔(46)は、その断面形状が多角形状となり、上記対向電極(50)の突起部(52)は、その断面形状が上記通気孔(46)の断面形状と同数の頂点を有する多角形状となり、該突起部(52)の角部が上記通気孔(46)の隅部と対向するように配置され、上記集塵電極(40)では、上記通気孔(46)の隅部の壁面が、該隅部に対向する突起部(52)の角部へ向かって膨出しているものである。   The first invention is a dust collection electrode (40) in which a vent hole (46) for flowing a gas to be treated is formed, and a protrusion (42) inserted through the vent hole (46) of the dust collection electrode (40). 52) having a counter electrode (50) formed thereon, and by applying a potential difference between the dust collecting electrode (40) and the counter electrode (50), the charged dust in the gas to be treated 46) The dust collector that collects by adhering to the wall surface. And, the vent hole (46) of the dust collecting electrode (40) has a polygonal cross-sectional shape, and the protrusion (52) of the counter electrode (50) has a cross-sectional shape of the vent hole (46). The polygonal shape has the same number of vertices as the cross-sectional shape, and the corners of the protrusions (52) are arranged to face the corners of the vent hole (46). The wall surface at the corner of the pore (46) bulges toward the corner of the protrusion (52) facing the corner.

第1の発明では、集塵電極(40)の通気孔(46)に対向電極(50)の突起部(52)が挿通される。集塵電極(40)と対向電極(50)の間に電位差を付与すると、通気孔(46)の壁面と突起部(52)との間の空間に電界が形成され、帯電した塵埃が電気的な引力によって通気孔(46)の壁面に引き寄せられる。この発明では、通気孔(46)の断面形状と突起部(52)の断面形状とが互いに同数の角を有する多角形状となっており、通気孔(46)の壁面の隅部と突起部(52)の角部とが互いに向かい合っている。集塵電極(40)において、通気孔(46)の隅部の壁面は、その隅部と向かい合う突起部(52)の角部に向かって膨出している。このため、通気孔(46)の隅部の壁面が膨出していない場合に比べ、通気孔(46)の隅部の壁面と突起部(52)との距離が短縮される。そして、通気孔(46)の壁面と突起部(52)の間に形成される空間では、通気孔(46)の隅部の壁面と突起部(52)との間の部分に形成される電界の強度と、それ以外の部分に形成される電界の強度との差が小さくなる。   In the first invention, the protrusion (52) of the counter electrode (50) is inserted into the vent hole (46) of the dust collecting electrode (40). When a potential difference is applied between the dust collection electrode (40) and the counter electrode (50), an electric field is formed in the space between the wall surface of the vent hole (46) and the protrusion (52), and the charged dust is electrically Is attracted to the wall surface of the vent hole (46) by a strong attractive force. In the present invention, the cross-sectional shape of the vent hole (46) and the cross-sectional shape of the protrusion (52) are polygonal shapes having the same number of corners, and the corners of the wall surface of the vent hole (46) and the protrusion ( 52) are facing each other. In the dust collecting electrode (40), the wall surface at the corner of the vent hole (46) bulges toward the corner of the projection (52) facing the corner. For this reason, compared with the case where the wall surface of the corner of the vent hole (46) is not bulged, the distance between the wall surface of the corner of the vent hole (46) and the protrusion (52) is shortened. Then, in the space formed between the wall surface of the vent hole (46) and the protrusion portion (52), the electric field formed at the portion between the wall surface of the corner portion of the vent hole (46) and the protrusion portion (52). And the difference between the strength of the electric field formed in the other portion and the strength of the other portion become small.

第2の発明は、上記第1の発明において、上記通気孔(46)の隅部の壁面は、その断面形状が内向きに湾曲した円弧となっているものである。   According to a second invention, in the first invention, the wall surface at the corner of the vent hole (46) is an arc whose cross-sectional shape is curved inward.

第2の発明の集塵電極(40)において、突起部(52)の角部へ向かって膨出する通気孔(46)の隅部の壁面は、その断面形状が内向きに湾曲した円弧となっている。つまり、この発明の通気孔(46)は、その断面形状が、角の丸まった多角形状になっている。   In the dust collecting electrode (40) of the second invention, the wall surface at the corner of the vent hole (46) that bulges toward the corner of the protrusion (52) has an arc whose cross-sectional shape is curved inward. It has become. That is, the vent hole (46) of the present invention has a polygonal shape with rounded corners.

第3の発明は、上記第2の発明において、上記通気孔(46)の隅部の壁面の断面形状は、円弧部分の端部における接線が該円弧部分の端部に連続する直線部分と重なる形状となっているものである。   In a third aspect based on the second aspect, the cross-sectional shape of the wall surface at the corner of the vent hole (46) overlaps with a straight line portion where the tangent at the end of the arc portion is continuous with the end of the arc portion. It is a shape.

第3の発明において、多角形状となった通気孔(46)の断面形状では、円弧となった隅部(即ち、円弧部分)の端部に連続して直線部分が形成されている。この発明の通気孔(46)の断面形状では、円弧部分の端部における接線が、その端部に連続する直線部分と重なっている。つまり、この通気孔(46)の断面形状では、円弧部分と直線部分が滑らかに連続しており、円弧部分と直線部分の間に角(かど)は形成されない。   In the third invention, in the cross-sectional shape of the polygonal vent hole (46), a straight line portion is formed continuously at the end of the arc corner (that is, the arc portion). In the cross-sectional shape of the vent hole (46) of the present invention, the tangent line at the end of the arc portion overlaps with the straight line portion continuing to the end portion. That is, in the cross-sectional shape of the vent hole (46), the circular arc portion and the straight line portion are smoothly continuous, and no corner is formed between the circular arc portion and the straight line portion.

第4の発明は、上記第2の発明において、上記通気孔(46)の隅部の壁面の断面形状は、該隅部と対向する突起部(52)の角部を曲率中心とする円弧となっているものである。   In a fourth aspect based on the second aspect, the cross-sectional shape of the wall surface of the corner portion of the vent hole (46) is an arc whose center of curvature is the corner portion of the protrusion (52) facing the corner portion. It is what has become.

第4の発明において、通気孔(46)の隅部の壁面の断面形状は、その隅部と対向する突起部(52)の角部を曲率中心とする円弧となっている。このため、隅部の壁面と突起部(52)との距離は、隅部の全体に亘って一定となり、更には通気孔(46)の壁面と突起部(52)の間の空間の全域に亘って一定となる。   In the fourth invention, the cross-sectional shape of the wall surface at the corner of the vent hole (46) is an arc whose center of curvature is the corner of the protrusion (52) facing the corner. For this reason, the distance between the wall surface of the corner and the protrusion (52) is constant over the entire corner, and further over the entire space between the wall of the vent hole (46) and the protrusion (52). It becomes constant over time.

第5の発明は、上記第1の発明において、上記通気孔(46)の隅部の壁面は、その断面形状が複数の頂点を有する折れ線状となっているものである。   According to a fifth aspect, in the first aspect, the wall surface at the corner of the vent hole (46) is a polygonal line having a plurality of vertices in cross-sectional shape.

第5の発明の集塵電極(40)において、突起部(52)の角部へ向かって膨出する通気孔(46)の隅部の壁面は、その断面形状が折れ線状となっている。つまり、この発明において、通気孔(46)の断面形状は、多角形の角に面取りを施したような形状になっている。   In the dust collecting electrode (40) of the fifth invention, the cross-sectional shape of the wall surface at the corner of the vent hole (46) that bulges toward the corner of the projection (52) is a polygonal line. In other words, in the present invention, the cross-sectional shape of the vent hole (46) is such that the corners of the polygon are chamfered.

第6の発明は、上記第1〜第5の何れか1つの発明において、上記対向電極(50)の突起部(52)の角部に面取りが施されているものである。   According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the corner portion of the protrusion (52) of the counter electrode (50) is chamfered.

第6の発明において、対向電極(50)の突起部(52)の断面形状は、その頂点付近が削り取られた形状となっている。この突起部(52)の角部の断面形状は、円弧状であってもよいし、折れ線状であってもよい。   In the sixth aspect of the invention, the cross-sectional shape of the protrusion (52) of the counter electrode (50) is a shape in which the vicinity of the apex is cut off. The cross-sectional shape of the corner of the protrusion (52) may be an arc or a polygonal line.

第7の発明は、上記第1〜第6の何れか1つの発明において、上記集塵電極(40)の材質が導電性樹脂となっているものである。   According to a seventh invention, in any one of the first to sixth inventions, the material of the dust collection electrode (40) is a conductive resin.

第7の発明において、少なくとも集塵電極(40)は、その材質が導電性樹脂となっている。導電性樹脂からなる集塵電極(40)は、例えば射出成形等の手法を用いて成形される。   In the seventh invention, at least the dust collecting electrode (40) is made of a conductive resin. The dust collecting electrode (40) made of a conductive resin is molded using a technique such as injection molding.

本発明の集塵電極(40)では、通気孔(46)の隅部の壁面が、その隅部と向かい合う突起部(52)の角部に向かって膨出している。このため、通気孔(46)の壁面と突起部(52)の間に形成される空間では、通気孔(46)の壁面と突起部(52)との距離のバラツキが小さくなり、その空間に形成される電界の強度のバラツキも小さくなる。従って、本発明によれば、通気孔(46)の壁面の各部分における単位面積当たりの塵埃の付着量の相違を小さくすることができる。その結果、通気孔(46)の壁面の全体を有効に利用して塵埃を捕集することができ、集塵装置の能力を充分に発揮させることが可能となる。   In the dust collection electrode (40) of the present invention, the wall surface at the corner of the vent hole (46) bulges toward the corner of the projection (52) facing the corner. For this reason, in the space formed between the wall surface of the vent hole (46) and the projecting portion (52), the variation in the distance between the wall surface of the vent hole (46) and the projecting portion (52) is reduced. The variation in the strength of the electric field formed is also reduced. Therefore, according to the present invention, it is possible to reduce the difference in the amount of dust attached per unit area in each portion of the wall surface of the vent hole (46). As a result, dust can be collected by effectively using the entire wall surface of the vent hole (46), and the capability of the dust collecting device can be fully exhibited.

上記第2〜第4の各発明では、通気孔(46)の隅部の壁面の断面形状が円弧となっている。特に、第4の発明において、通気孔(46)の隅部の壁面の断面形状は、その隅部と対向する突起部(52)の角部を曲率中心とする円弧となっている。このため、隅部の壁面と突起部(52)との距離が、通気孔(46)の壁面と突起部(52)の間の空間の全域に亘って一定となる。従って、この第4の発明によれば、通気孔(46)の壁面と突起部(52)の間の空間の全域に亘って電界の強度を平均化することができ、通気孔(46)の壁面の全体に亘って単位面積当たりに付着する塵埃の量を平均化できる。   In each of the second to fourth inventions, the cross-sectional shape of the wall surface at the corner of the vent hole (46) is an arc. In particular, in the fourth invention, the cross-sectional shape of the wall surface at the corner of the vent hole (46) is an arc whose center of curvature is at the corner of the protrusion (52) facing the corner. For this reason, the distance between the wall surface of the corner and the protrusion (52) is constant over the entire space between the wall surface of the vent hole (46) and the protrusion (52). Therefore, according to the fourth aspect of the invention, the strength of the electric field can be averaged over the entire space between the wall surface of the vent hole (46) and the protrusion (52), and the vent hole (46) It is possible to average the amount of dust adhering per unit area over the entire wall surface.

上記第6の発明では、対向電極(50)の突起部(52)の角部に面取りが施されている。このため、突起部(52)の角部への電界の集中が緩和される。従って、この発明によれば、通気孔(46)の壁面と突起部(52)の間の空間に形成される電界の強度を、その空間の全域に亘って一層確実に平均化することができる。   In the sixth aspect of the invention, the corners of the protrusions (52) of the counter electrode (50) are chamfered. For this reason, the concentration of the electric field on the corner of the protrusion (52) is alleviated. Therefore, according to the present invention, the strength of the electric field formed in the space between the wall surface of the vent hole (46) and the protrusion (52) can be more reliably averaged over the entire space. .

上記第7の発明では、通気孔(46)が形成された集塵電極(40)の材質が導電性樹脂となっている。この発明の集塵電極(40)は、通気孔(46)の隅部の壁面が膨出したやや複雑な形状となっている。一方、導電性樹脂からなる集塵電極(40)は、射出成形等の手法を用いて容易に大量生産できる。従って、この発明によれば、やや複雑な形状の集塵電極(40)を、容易に低コストで大量に製造することが可能となる。   In the seventh invention, the material of the dust collecting electrode (40) in which the vent hole (46) is formed is a conductive resin. The dust collecting electrode (40) of the present invention has a slightly complicated shape in which the wall surface at the corner of the vent hole (46) bulges. On the other hand, the dust collection electrode (40) made of a conductive resin can be easily mass-produced using a technique such as injection molding. Therefore, according to the present invention, it is possible to easily manufacture a large amount of dust collecting electrodes (40) having a slightly complicated shape at a low cost.

以下、本発明の実施形態を図面に基づいて詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

《発明の実施形態1》
本発明の実施形態1について説明する。本実施形態の空気清浄機(10)は、一般家庭や小規模店舗などで用いられる民生用の空気浄化装置であって、本発明の集塵装置を構成している。
Embodiment 1 of the Invention
A first embodiment of the present invention will be described. The air cleaner (10) of the present embodiment is a consumer air purification device used in ordinary households and small stores, and constitutes the dust collector of the present invention.

〈空気清浄機の全体構成〉
図1及び図2に示すように、空気清浄機(10)は、ケーシング(20)を備えると共に、該ケーシング(20)の内部に収納されたプレフィルタ(11)と荷電部(12)と集塵部(30)と触媒フィルタ(13)と送風機(14)とを備えている。
<Overall configuration of the air purifier>
As shown in FIGS. 1 and 2, the air cleaner (10) includes a casing (20), and a prefilter (11), a charging unit (12), and a collection unit housed in the casing (20). A dust part (30), a catalyst filter (13), and a blower (14) are provided.

ケーシング(20)は、例えば、矩形体状の横長の容器に形成され、前面が空気の吸込口(21)に形成され、背面が空気の吹出口(22)に形成され、内部が空気通路(23)に形成されている。そして、プレフィルタ(11)と荷電部(12)と集塵部(30)と触媒フィルタ(13)と送風機(14)とが吸込口(21)から吹出口(22)に向かって順に配置されている。   The casing (20) is formed in, for example, a rectangular horizontally long container, the front surface is formed in an air suction port (21), the back surface is formed in an air outlet (22), and the inside is an air passage ( 23) is formed. The prefilter (11), the charging part (12), the dust collecting part (30), the catalyst filter (13), and the blower (14) are arranged in order from the suction port (21) toward the blowout port (22). ing.

プレフィルタ(11)は、吸込口(21)からケーシング(20)内に吸込まれた空気に含まれる比較的大きな塵埃を捕集するためのフィルタを構成している。   The prefilter (11) constitutes a filter for collecting relatively large dust contained in the air sucked into the casing (20) from the suction port (21).

荷電部(12)は、イオン化部を構成し、プレフィルタ(11)を通過した比較的小さな塵埃を帯電させるものである。荷電部(12)は、図示しないが、例えば、複数のイオン化線と、複数の対向電極から構成され、該イオン化線と対向電極との間に直流電圧が印加されるように構成されている。イオン化線は、荷電部(12)の上端から下端に亘って設けられ、対向電極はイオン化線の間に配置されている。   The charging unit (12) constitutes an ionization unit and charges relatively small dust that has passed through the prefilter (11). Although not shown, the charging unit (12) includes, for example, a plurality of ionization lines and a plurality of counter electrodes, and is configured such that a DC voltage is applied between the ionization lines and the counter electrodes. The ionization line is provided from the upper end to the lower end of the charging unit (12), and the counter electrode is disposed between the ionization lines.

集塵部(30)は、荷電部(12)で帯電した塵埃を吸着して捕集するものである。この集塵部(30)については、後述する。   The dust collection part (30) adsorbs and collects the dust charged by the charging part (12). The dust collection part (30) will be described later.

触媒フィルタ(13)は、図示しないが、例えばハニカム構造の基材の表面に触媒が担持されて構成されている。該触媒は、例えば、マンガン系触媒や貴金属触媒などが適用され、集塵部(30)を通過して塵埃が除去された空気中の有害成分や臭気成分を分解する。   Although not shown, the catalyst filter (13) is configured, for example, by supporting a catalyst on the surface of a substrate having a honeycomb structure. As the catalyst, for example, a manganese-based catalyst, a noble metal catalyst, or the like is applied, and decomposes harmful components and odor components in the air from which dust has been removed after passing through the dust collecting section (30).

送風機(14)は、ケーシング(20)内の空気通路(23)において最下流側に配置されている。この送風機(14)は、室内空気をケーシング(20)内に吸い込み、清浄空気を室内に吹き出すためのものである。   The blower (14) is disposed on the most downstream side in the air passage (23) in the casing (20). The blower (14) is for sucking room air into the casing (20) and blowing out clean air into the room.

〈集塵部の構成〉
集塵部(30)について、詳細に説明する。
<Configuration of the dust collector>
The dust collection part (30) will be described in detail.

図3〜図5に示すように、集塵部(30)は、アース電極である集塵電極(40)と対向電極である高圧電極(50)とを備えている。該集塵電極(40)と高圧電極(50)とは、何れか一方が第1電極を構成し、他方が第2電極を構成している。   As shown in FIGS. 3-5, the dust collection part (30) is provided with the dust collection electrode (40) which is a ground electrode, and the high voltage electrode (50) which is a counter electrode. One of the dust collection electrode (40) and the high voltage electrode (50) constitutes a first electrode, and the other constitutes a second electrode.

集塵電極(40)と高圧電極(50)とは、それぞれの材質が導電性樹脂となっており、例えば射出成形等の手法を用いて成形されている。集塵電極(40)及び高圧電極(50)の材質は、微導電性樹脂が好ましく、特に体積抵抗率が10Ωcm以上1013Ωcm以下の樹脂であることが好ましい。また、集塵電極(40)と高圧電極(50)とは、基本的にほぼ同一の形状に形成され、一部が相互に挿入自在な差し込み構造に構成されている。 The dust collection electrode (40) and the high voltage electrode (50) are each made of a conductive resin, and are formed using a technique such as injection molding. The material of the dust collection electrode (40) and the high voltage electrode (50) is preferably a slightly conductive resin, and particularly preferably a resin having a volume resistivity of 10 8 Ωcm to 10 13 Ωcm. The dust collection electrode (40) and the high-voltage electrode (50) are basically formed in substantially the same shape, and a part of the dust collection electrode (40) and the high-voltage electrode (50) are configured to be inserted into each other.

集塵電極(40)と高圧電極(50)のそれぞれは、矩形状に形成されており、1つの基台部材(41,51)と、基台部材(41,51)から突出する多数の突起部材(42,52)とを備えている。突起部材(42,52)は、突起部を構成している。基台部材(41,51)は、枠体(43,53)と、該枠体(43,53)の内部に設けられた複数の縦仕切部材(44,54)及び複数の横仕切部材(45,55)とを備えている。集塵電極(40)及び高圧電極(50)では、基台部材(41,51)の枠体(43,53)と縦仕切部材(44,54)と横仕切部材(45,55)とが一体に形成され、更には基台部材(41,51)と突起部材(42,52)とが一体に形成される。   Each of the dust collection electrode (40) and the high voltage electrode (50) is formed in a rectangular shape, and includes one base member (41, 51) and a number of protrusions protruding from the base member (41, 51). And members (42, 52). The protruding member (42, 52) constitutes a protruding portion. The base member (41, 51) includes a frame (43, 53), a plurality of vertical partition members (44, 54) and a plurality of horizontal partition members (43, 53) provided inside the frame (43, 53). 45, 55). In the dust collection electrode (40) and the high voltage electrode (50), the frame (43,53), vertical partition member (44,54) and horizontal partition member (45,55) of the base member (41,51) The base member (41, 51) and the protruding member (42, 52) are integrally formed.

枠体(43,53)は、矩形状に形成されている。集塵電極(40)の枠体(43)は、高圧電極(50)の枠体(53)よりも厚くなっている。高圧電極(50)の枠体(53)では、4つの隅角部に薄肉部(4a)が形成されると共に、各薄肉部(4a)に固定孔(4b)を有する固定脚(4c)が立設されている。高圧電極(50)の枠体(53)では、4つの隅角部に薄肉部(5a)が形成されると共に、各薄肉部(5a)に固定孔(5b)が形成されている。集塵電極(40)の枠体(43)と高圧電極(50)の枠体(53)とは、四隅の薄肉部(4a,5a)において、固定脚(4c)を介して互いに固定され、集塵電極(40)の基台部材(41)と高圧電極(50)の基台部材(51)とが相対向して配置されている。また、集塵電極(40)と高圧電極(50)の基台部材(41,51)は、空気通路(23)において、空気流れと直交する方向に配置されている。   The frame (43, 53) is formed in a rectangular shape. The frame body (43) of the dust collection electrode (40) is thicker than the frame body (53) of the high voltage electrode (50). In the frame (53) of the high-voltage electrode (50), the thin-walled portion (4a) is formed at the four corners, and the fixed leg (4c) having the fixed hole (4b) in each thin-walled portion (4a) It is erected. In the frame (53) of the high-voltage electrode (50), the thin wall portions (5a) are formed at the four corner portions, and the fixing holes (5b) are formed at the respective thin wall portions (5a). The frame body (43) of the dust collecting electrode (40) and the frame body (53) of the high voltage electrode (50) are fixed to each other via the fixed legs (4c) in the thin wall portions (4a, 5a) at the four corners, The base member (41) of the dust collecting electrode (40) and the base member (51) of the high-voltage electrode (50) are arranged to face each other. Further, the base members (41, 51) of the dust collecting electrode (40) and the high voltage electrode (50) are arranged in a direction orthogonal to the air flow in the air passage (23).

集塵電極(40)及び高圧電極(50)では、縦仕切部材(44,54)と横仕切部材(45,55)とが縦横に交叉するように配列されている。集塵電極(40)及び高圧電極(50)は、それぞれの縦仕切部材(44,54)がケーシング(20)の上下方向に延び、それぞれの横仕切部材(45,55)がケーシング(20)の幅方向に延びる姿勢で配置されている。基台部材(41,51)には、枠体(43,53)と縦仕切部材(44,54)と横仕切部材(45,55)とによって囲まれる多数の通風孔(46,56)が形成されている。これら通風孔(46,56)は、被処理気体としての空気が流れる通気孔を構成している。つまり、基台部材(41,51)は、縦仕切部材(44,54)と横仕切部材(45,55)とによって長方形の四角格子構造に形成されている。   In the dust collection electrode (40) and the high voltage electrode (50), the vertical partition members (44, 54) and the horizontal partition members (45, 55) are arranged so as to cross vertically and horizontally. In the dust collecting electrode (40) and the high voltage electrode (50), the vertical partition members (44, 54) extend in the vertical direction of the casing (20), and the respective horizontal partition members (45, 55) are the casing (20). It is arrange | positioned with the attitude | position extended in the width direction. The base member (41, 51) has a number of ventilation holes (46, 56) surrounded by the frame (43, 53), the vertical partition member (44, 54), and the horizontal partition member (45, 55). Is formed. These ventilation holes (46, 56) constitute a ventilation hole through which air as a gas to be treated flows. That is, the base member (41, 51) is formed in a rectangular square lattice structure by the vertical partition members (44, 54) and the horizontal partition members (45, 55).

集塵電極(40)と高圧電極(50)の縦仕切部材(44,54)は、集塵電極(40)の基台部材(41)と高圧電極(50)の基台部材(51)とを固定した組み立て状態において、同一平面上に位置するように形成されている。また、集塵電極(40)と高圧電極(50)の横仕切部材(45,55)は、集塵電極(40)の基台部材(41)と高圧電極(50)の基台部材(51)とを固定した組み立て状態において、図5の上下方向に、千鳥状に位置するように形成されている。つまり、集塵電極(40)の横仕切部材(45)は、高圧電極(50)の通風孔(56)の中央部に位置し、高圧電極(50)の横仕切部材(55)は、集塵電極(40)の通風孔(46)の中央部に位置している。   The vertical partition members (44, 54) of the dust collection electrode (40) and the high voltage electrode (50) are composed of a base member (41) of the dust collection electrode (40) and a base member (51) of the high voltage electrode (50). Are assembled so as to be positioned on the same plane. Further, the horizontal partition members (45, 55) of the dust collection electrode (40) and the high voltage electrode (50) are divided into the base member (41) of the dust collection electrode (40) and the base member (51 of the high voltage electrode (50)). ) Are fixed so as to be positioned in a staggered manner in the vertical direction of FIG. That is, the horizontal partition member (45) of the dust collection electrode (40) is located at the center of the ventilation hole (56) of the high voltage electrode (50), and the horizontal partition member (55) of the high voltage electrode (50) is It is located in the center of the ventilation hole (46) of the dust electrode (40).

突起部材(42,52)は、横仕切部材(45,55)に一体形成されて該横仕切部材(45,55)より突出している。該突起部材(42,52)は、横仕切部材(45,55)と同一厚さの平板状の突出片に形成され、相対する電極(50,40)の通風孔(56,46)の内部に延びている。そして、突起部材(42,52)の横方向の隙間には、相対する電極(50,40)の縦仕切部材(54,44)が位置するように突起部材(42,52)が形成されている。   The protruding members (42, 52) are integrally formed with the horizontal partition members (45, 55) and protrude from the horizontal partition members (45, 55). The projecting member (42, 52) is formed in a flat plate-like projecting piece having the same thickness as the horizontal partition member (45, 55), and is located inside the vent hole (56, 46) of the opposing electrode (50, 40). It extends to. The projecting members (42, 52) are formed in the lateral gaps of the projecting members (42, 52) so that the vertical partition members (54, 44) of the opposing electrodes (50, 40) are positioned. Yes.

図6に示すように、 高圧電極(50)の突起部材(52)は、その中心軸が集塵電極(40)の通風孔(46)の中心軸と一致する姿勢で設置されている。この突起部材(52)は、その中心軸と直交する断面の形状が扁平な長方形状となっている。突起部材(52)の角部は、2つの平面が直交する稜線(即ち、面取りが施されていない形状)となっている。   As shown in FIG. 6, the projecting member (52) of the high-voltage electrode (50) is installed in such a posture that its central axis coincides with the central axis of the ventilation hole (46) of the dust collecting electrode (40). The protruding member (52) has a rectangular shape with a flat cross-sectional shape perpendicular to the central axis. The corner of the protruding member (52) is a ridge line (that is, a shape that is not chamfered) where two planes are orthogonal.

集塵電極(40)の枠体(43)では、通風孔(46)の断面形状が、扁平な四角形状となっている。つまり、通風孔(46)は、その中心軸と直交する断面の形状が、突起部材(52)の断面形状と同数の頂点を有する凸多角形(即ち、4つの頂点を有する四角形)となっている。通風孔(46)の内壁面では、突起部材(52)の側面の投影面となる部分が投影部(60)を構成し、突起部材(52)の側面の投影面とならない部分(図6においてハッチングを付した部分)が非投影部(61)を構成している。   In the frame (43) of the dust collecting electrode (40), the cross-sectional shape of the ventilation hole (46) is a flat quadrangular shape. That is, the vent hole (46) is a convex polygon having a cross-sectional shape orthogonal to the central axis thereof having the same number of vertices as the cross-sectional shape of the protruding member (52) (that is, a quadrilateral having four vertices). Yes. On the inner wall surface of the vent hole (46), the portion that becomes the projection surface on the side surface of the projection member (52) constitutes the projection portion (60), and the portion that does not become the projection surface on the side surface of the projection member (52) (in FIG. The hatched part) constitutes the non-projection part (61).

突起部材(52)の上下側面及び左右側面とそれぞれに対面する通風孔(46)の内壁面の投影部(60)との距離は、何れも同じ値dとなっている(図6を参照)。この突起部材(52)の側面と投影部(60)との間隔dは、1.0mm以上2.0mm以下に設定するのが望ましく、1.2mmに設定するのが特に好ましい。   The distance between the upper and lower side surfaces and the left and right side surfaces of the projecting member (52) and the projection portion (60) of the inner wall surface of the ventilation hole (46) facing each other has the same value d (see FIG. 6). . The distance d between the side surface of the projecting member (52) and the projection part (60) is preferably set to 1.0 mm or more and 2.0 mm or less, particularly preferably set to 1.2 mm.

図7にも示すように、通風孔(46)の中心軸に直交する断面において、投影部(60)の形状は直線となる一方、非投影部(61)の形状は1/4円弧(中心角が90°の円弧)となっている。また、この断面において、1/4円弧に形成された非投影部(61)は、その曲率中心Pが非投影部(61)に対向する突起部材(52)の角部と一致すると共に、その曲率半径rが突起部材(52)の側面と投影部(60)との間隔dと等しくなっている。つまり、通風孔(46)の内壁面では、非投影部(61)の全体が内側へ湾曲した円弧面(62)となっている。   As shown in FIG. 7, in the cross section orthogonal to the central axis of the vent hole (46), the shape of the projection part (60) is a straight line, while the shape of the non-projection part (61) is a 1/4 arc (center). An arc having a 90 ° angle). Further, in this cross section, the non-projection part (61) formed in the ¼ arc has a center of curvature P that coincides with the corner of the projecting member (52) facing the non-projection part (61), and The radius of curvature r is equal to the distance d between the side surface of the protruding member (52) and the projection part (60). That is, on the inner wall surface of the ventilation hole (46), the entire non-projection portion (61) is an arc surface (62) curved inward.

また、通風孔(46)の中心軸に直交する断面において、円弧部分となった非投影部(61)の両端における接線は、非投影部(61)に隣接する直線部分である投影部(60)と重なっている。つまり、通風孔(46)の内壁面では、投影部(60)と非投影部(61)が滑らかに連続している。   In addition, in the cross section orthogonal to the central axis of the ventilation hole (46), the tangent at both ends of the non-projection part (61) that is an arc part is a projection part (60 that is a straight line part adjacent to the non-projection part (61). ). That is, the projection part (60) and the non-projection part (61) are smoothly continuous on the inner wall surface of the ventilation hole (46).

このように、集塵電極(40)の基台部材(41)において、通風孔(46)の内壁面の4つの隅部は、それぞれが内側に湾曲した円弧面(62)となっている。つまり、通風孔(46)の中心軸に直交する断面において、通風孔(46)の隅部の壁面は、通風孔(46)の内壁面が突起部材(52)の側面と平行な平面のみで構成される場合の形状(図6,図7に二点鎖線で示す形状)に比べて、内側へ膨出している。このため、本実施形態の集塵部(30)では、通風孔(46)の隅部の壁面と高圧電極(50)の突起部材(52)との距離が、従来に比べて短くなっている。   Thus, in the base member (41) of the dust collecting electrode (40), the four corners of the inner wall surface of the ventilation hole (46) are arcuate surfaces (62) that are curved inward. That is, in the cross section orthogonal to the central axis of the vent hole (46), the wall surface at the corner of the vent hole (46) is only a plane in which the inner wall surface of the vent hole (46) is parallel to the side surface of the projection member (52). Compared to the shape of the configuration (the shape indicated by the two-dot chain line in FIGS. 6 and 7), it bulges inward. For this reason, in the dust collection part (30) of this embodiment, the distance of the wall surface of the corner part of a ventilation hole (46) and the projection member (52) of a high voltage electrode (50) is shorter than before. .

その点について、図7を参照しながら詳しく説明する。従来のように通風孔(46)の内壁面が突起部材(52)の側面と平行な平面のみで構成される場合において、同図に二点鎖線で示す通風孔(46)の隅部の内壁面と突起部材(52)の角部との距離は、最大でd'となる。一方、本実施形態の集塵電極(40)では、通風孔(46)の隅部の内壁面を含む非投影部(61)が円弧面(62)となっており、非投影部(61)と突起部材(52)の角部との距離は、非投影部(61)の全体に亘ってdとなる。非投影部(61)と突起部材(52)の角部との距離dは、距離d'よりも短くなっている(d<d')。なお、非投影部(61)と突起部材(52)の角部との距離dは、突起部材(52)の側面と投影部(60)との間隔dと等しく(d=d)、円弧面(62)である非投影部(61)の曲率半径rとも等しい(d=r)。 This point will be described in detail with reference to FIG. In the case where the inner wall surface of the vent hole (46) is configured only by a plane parallel to the side surface of the projecting member (52) as in the prior art, the inside of the corner portion of the vent hole (46) indicated by a two-dot chain line in FIG. The maximum distance between the wall surface and the corner of the protruding member (52) is d ′. On the other hand, in the dust collection electrode (40) of this embodiment, the non-projection part (61) including the inner wall surface at the corner of the ventilation hole (46) is an arc surface (62), and the non-projection part (61) the distance between the corner portion of the projection member (52) is a d c over the entire non-projection unit (61). The distance d c of the non-projecting portion (61) and the corner portion of the projection member (52), the distance d 'is shorter than (d c <d'). The distance d c between the non-projection part (61) and the corner of the projection member (52) is equal to the distance d between the side surface of the projection member (52) and the projection part (60) (d c = d), unprojected portion is an arc surface (62) is also equal to the radius of curvature r of (61) (d c = r).

−運転動作−
次に、空気清浄機(10)の空気清浄動作について説明する。
-Driving action-
Next, the air cleaning operation of the air cleaner (10) will be described.

図1及び図2に示すように、送風機(14)を駆動すると、空気清浄機(10)では、被処理気体である室内空気がケーシング(20)の空気通路(23)に吸引され、該空気通路(23)を流れる。また、空気清浄機(10)では、荷電部(12)のイオン化線と対向電極と間に直流電圧が印加され、集塵部(30)の集塵電極(40)と高圧電極(50)との間に直流電圧が印加される。   As shown in FIGS. 1 and 2, when the blower (14) is driven, the air cleaner (10) sucks indoor air, which is a gas to be treated, into the air passage (23) of the casing (20). Flow through passage (23). In the air cleaner (10), a DC voltage is applied between the ionization line of the charging part (12) and the counter electrode, and the dust collecting electrode (40) and the high voltage electrode (50) of the dust collecting part (30) A DC voltage is applied during

ケーシング(20)の空気通路(23)に吸引された室内空気は、先ずプレフィルタ(11)を通過する。プレフィルタ(11)は、室内空気に含まれる比較的大きな塵埃を捕集する。   The room air sucked into the air passage (23) of the casing (20) first passes through the prefilter (11). The prefilter (11) collects relatively large dust contained in the room air.

プレフィルタ(11)を通過した室内空気は、荷電部(12)に流れる。この荷電部(12)では、プレフィルタ(11)を通過した比較的小さな塵埃が正極に帯電し、この帯電した塵埃が下流側に流れることになる。   The room air that has passed through the prefilter (11) flows to the charging section (12). In the charging unit (12), relatively small dust that has passed through the prefilter (11) is charged to the positive electrode, and the charged dust flows downstream.

続いて、帯電した塵埃は、室内空気と共に集塵部(30)に流れ込み、集塵電極(40)と高圧電極(50)における基台部材(41,51)の通風孔(46,56)を通過する。つまり、集塵電極(40)と高圧電極(50)の基台部材(41,51)における枠体(43,53)と縦仕切部材(44,54)と横仕切部材(45,55)とで形成される通風孔(46,56)を室内空気が流れ、集塵電極(40)と高圧電極(50)の突起部材(42,52)の周囲を室内空気が流れる。   Subsequently, the charged dust flows into the dust collecting part (30) together with the room air, and passes through the ventilation holes (46, 56) of the base member (41, 51) in the dust collecting electrode (40) and the high voltage electrode (50). pass. That is, the frame body (43, 53), the vertical partition member (44, 54) and the horizontal partition member (45, 55) in the base member (41, 51) of the dust collection electrode (40) and the high voltage electrode (50) The room air flows through the ventilation holes (46, 56) formed in the above, and the room air flows around the protrusions (42, 52) of the dust collection electrode (40) and the high voltage electrode (50).

その際、集塵電極(40)は、負極に設定されている。そのため、正極に帯電した塵埃は、電気的な引力によって集塵電極(40)に引き寄せられる。そして、塵埃は、集塵電極(40)の通風孔(46)の内壁面や突起部材(42)の表面に付着する。   In that case, the dust collection electrode (40) is set to the negative electrode. Therefore, the dust charged on the positive electrode is attracted to the dust collection electrode (40) by electrical attraction. The dust adheres to the inner wall surface of the ventilation hole (46) of the dust collecting electrode (40) and the surface of the protruding member (42).

その後、塵埃が除去された室内空気は、触媒フィルタ(13)を流れ、空気中の有害物質や臭気物質が分解除去され、清浄空気となる。この清浄空気は、送風機(14)を通り、空気通路(23)から室内に吹き出される。空気清浄機(10)は、このような動作を行うことで、室内空気を清浄化する。   Thereafter, the room air from which the dust has been removed flows through the catalyst filter (13), and harmful substances and odorous substances in the air are decomposed and removed to become clean air. This clean air passes through the blower (14) and is blown into the room from the air passage (23). The air cleaner (10) cleans room air by performing such an operation.

ここで、本実施形態の集塵電極(40)では、通風孔(46)の内壁面の非投影部(61)が全体に亘って円弧面(62)となっている。そして、この非投影部(61)と高圧電極(50)の突起部材(52)の角部との距離dは、非投影部(61)の全体に亘って、投影部(60)と突起部材(52)の角部との距離dと等しくなっている。一方、通風孔(46)の内壁面と突起部材(52)の間の空間に形成される電界の強度は、両者間の距離に相関する。このため、通風孔(46)の内壁面と突起部材(52)の間の空間に形成される電界の強度は、その空間の全体に亘って概ね一様となる。その結果、通風孔(46)の内壁面の単位面積当たりに付着する塵埃の量は、投影部(60)における値と非投影部(61)における値とが概ね等しくなる。 Here, in the dust collection electrode (40) of this embodiment, the non-projection part (61) of the inner wall surface of the ventilation hole (46) is a circular arc surface (62) over the whole. Then, the distance d c between the corner portion of the projection member (52) of the non-projecting portion (61) and the high-voltage electrode (50), throughout the non-projection unit (61), the projection portion (60) protruding It is equal to distance d with the corner | angular part of a member (52). On the other hand, the strength of the electric field formed in the space between the inner wall surface of the ventilation hole (46) and the protruding member (52) correlates with the distance between the two. For this reason, the strength of the electric field formed in the space between the inner wall surface of the ventilation hole (46) and the protruding member (52) is substantially uniform over the entire space. As a result, the amount of dust attached per unit area of the inner wall surface of the ventilation hole (46) is approximately equal to the value in the projection unit (60) and the value in the non-projection unit (61).

−実施形態1の効果−
本実施形態の集塵電極(40)では、通風孔(46)の非投影部(61)の壁面が、その非投影部(61)と向かい合う突起部(42)の角部に向かって膨出している。このため、通風孔(46)の壁面と突起部(42)の間に形成される空間では、通風孔(46)の壁面と突起部(42)との距離のバラツキが小さくなり、その空間に形成される電界の強度のバラツキも小さくなる。従って、本実施形態によれば、通風孔(46)の内壁面の各部分における単位面積当たりの塵埃の付着量の相違を小さくすることができる。
-Effect of Embodiment 1-
In the dust collection electrode (40) of this embodiment, the wall surface of the non-projection part (61) of the ventilation hole (46) bulges toward the corner of the projection part (42) facing the non-projection part (61). ing. For this reason, in the space formed between the wall surface of the ventilation hole (46) and the projection (42), the variation in the distance between the wall surface of the ventilation hole (46) and the projection (42) becomes small, and the space The variation in the strength of the electric field formed is also reduced. Therefore, according to the present embodiment, it is possible to reduce the difference in the amount of dust attached per unit area in each portion of the inner wall surface of the ventilation hole (46).

ここで、通風孔(46)の奥行き(図7の紙面に垂直な方向の長さ)をDとする。非投影部(61)の全体が円弧面となる本実施形態の集塵電極(40)において、通風孔(46)の内壁面の1つの非投影部(61)の面積Aは、A=2πr/4×D=(πr×D)/2となる。また、通風孔(46)の内壁面が突起部材(52)の側面と平行な平面のみで構成される従来の集塵電極では、通風孔(46)の隅部が図7に二点鎖線で示す形状となるため、非投影部(61)に相当する部分の面積A'は、A'=2d×Dとなる。   Here, D is the depth of the ventilation hole (46) (the length in the direction perpendicular to the paper surface of FIG. 7). In the dust collection electrode (40) of the present embodiment in which the entire non-projection part (61) is an arc surface, the area A of one non-projection part (61) on the inner wall surface of the ventilation hole (46) is A = 2πr. / 4 × D = (πr × D) / 2. Further, in the conventional dust collecting electrode in which the inner wall surface of the ventilation hole (46) is composed only of a plane parallel to the side surface of the protruding member (52), the corner of the ventilation hole (46) is shown by a two-dot chain line in FIG. Therefore, the area A ′ of the portion corresponding to the non-projection part (61) is A ′ = 2d × D.

一方、本実施形態の集塵電極(40)において、通風孔(46)の内壁面の単位面積当たりの塵埃の付着量Gは、投影部(60)と非投影部(61)とで同じ値となる。それに対し、従来の集塵電極において、非投影部(61)に相当する部分における単位面積当たりの塵埃の付着量G'は、それ以外の部分における単位面積当たりの塵埃の付着量Gの60%程度となる。   On the other hand, in the dust collection electrode (40) of the present embodiment, the amount of dust adhesion G per unit area of the inner wall surface of the vent hole (46) is the same value in the projection part (60) and the non-projection part (61). It becomes. On the other hand, in the conventional dust collecting electrode, the dust adhesion amount G ′ per unit area in the portion corresponding to the non-projection part (61) is 60% of the dust adhesion amount G per unit area in the other portions. It will be about.

このため、通風孔(46)の1つの隅部に付着する塵埃の量は、本実施形態の集塵電極(40)ではM=G×A=G(πr×D)/2≒1.57G×r×Dとなるのに対し、従来の集塵電極ではM'=G'×A'=0.6G×2d×D=1.2G×d×Dとなる。そして、r=dであるため、M>M'となる。従って、本実施形態によれば、通風孔(46)の内壁面の全体を有効に利用して塵埃を捕集することが可能となり、集塵部(30)が付着し得る塵埃の量を増大させることができる。   Therefore, the amount of dust adhering to one corner of the ventilation hole (46) is M = G × A = G (πr × D) /2≈1.57G in the dust collection electrode (40) of the present embodiment. In contrast to × r × D, in the conventional dust collecting electrode, M ′ = G ′ × A ′ = 0.6 G × 2d × D = 1.2 G × d × D. Since r = d, M> M ′. Therefore, according to the present embodiment, it becomes possible to collect dust by effectively using the entire inner wall surface of the ventilation hole (46), and the amount of dust that can be attached to the dust collecting part (30) is increased. Can be made.

特に、本実施形態の集塵電極(40)において、通風孔(46)の非投影部(61)の壁面は、その非投影部(61)と対向する突起部(42)の角部を曲率中心とする円弧面(62)となっている。このため、非投影部(61)の壁面と突起部(42)との距離は、通風孔(46)の壁面と突起部(42)の間の空間の全域に亘って一定となる。従って、本実施形態によれば、通風孔(46)の内壁面と突起部(42)の間の空間の全域に亘って電界の強度を均一化することができ、通風孔(46)の壁面の全体に亘って単位面積当たりに付着する塵埃の量を平均化できる。   In particular, in the dust collection electrode (40) of the present embodiment, the wall surface of the non-projection part (61) of the ventilation hole (46) has a curvature at the corner of the projection part (42) facing the non-projection part (61). The arc surface (62) is the center. For this reason, the distance between the wall surface of the non-projection part (61) and the projection part (42) is constant over the entire space between the wall surface of the ventilation hole (46) and the projection part (42). Therefore, according to this embodiment, the strength of the electric field can be made uniform over the entire space between the inner wall surface of the ventilation hole (46) and the protrusion (42), and the wall surface of the ventilation hole (46). The amount of dust adhering per unit area can be averaged over the entire area.

また、本実施形態では、集塵電極(40)の材質が導電性樹脂となっている。この集塵電極(40)は、通風孔(46)の隅部の壁面が膨出したやや複雑な形状となっている。一方、導電性樹脂からなる集塵電極(40)は、射出成形等の手法を用いて容易に大量生産できる。従って、本実施形態によれば、やや複雑な形状の集塵電極(40)を、容易に低コストで大量に製造することが可能となる。   In the present embodiment, the material of the dust collection electrode (40) is a conductive resin. The dust collecting electrode (40) has a slightly complicated shape in which the wall surface at the corner of the ventilation hole (46) bulges. On the other hand, the dust collection electrode (40) made of a conductive resin can be easily mass-produced using a technique such as injection molding. Therefore, according to the present embodiment, it is possible to easily manufacture a large amount of dust collecting electrodes (40) having a slightly complicated shape at a low cost.

−実施形態1の変形例1−
本実施形態の集塵電極(40)では、通風孔(46)の内壁面の非投影部(61)が円弧面(62)と平面(63)とで構成されていてもよい。
-Modification 1 of Embodiment 1-
In the dust collection electrode (40) of this embodiment, the non-projection part (61) of the inner wall surface of the ventilation hole (46) may be comprised by the circular arc surface (62) and the plane (63).

図8に示すように、通風孔(46)の中心軸に直交する断面において、非投影部(61)の形状は、1/4円弧(中心角が90°の円弧)と、その両端から接線方向へ延びる直線とで構成されている。また、この断面において、非投影部(61)のうち1/4円弧に形成された部分は、その曲率中心Pが非投影部(61)に対向する突起部材(52)の角部の外側に位置すると共に、その曲率半径rが突起部材(52)の側面と投影部(60)との間隔dよりも短くなっている(r<d)。つまり、通風孔(46)の内壁面では、非投影部(61)の一部が内側へ湾曲した円弧面(62)となっており、円弧面(62)の両側の部分が平面(63)となっている。   As shown in FIG. 8, in the cross section orthogonal to the central axis of the ventilation hole (46), the shape of the non-projection part (61) is ¼ arc (arc having a central angle of 90 °) and tangent from both ends thereof. And a straight line extending in the direction. Further, in this cross section, a portion of the non-projection portion (61) formed in the ¼ arc is located outside the corner portion of the projection member (52) whose curvature center P faces the non-projection portion (61). In addition to being positioned, the radius of curvature r is shorter than the distance d between the side surface of the projecting member (52) and the projection part (60) (r <d). In other words, on the inner wall surface of the ventilation hole (46), a part of the non-projection part (61) is an arc surface (62) curved inward, and portions on both sides of the arc surface (62) are flat surfaces (63). It has become.

本変形例の集塵電極(40)では、通風孔(46)の内壁面の非投影部(61)の一部が円弧面(62)となっており、非投影部(61)と突起部材(52)の角部との距離は、最大でdとなる。そして、非投影部(61)と突起部材(52)の角部との距離dは、距離d'よりも短くなっている(d<d')。なお、非投影部(61)と突起部材(52)の角部との距離dは、突起部材(52)の側面と投影部(60)との間隔dよりも長くなっている(d>d)。 In the dust collecting electrode (40) of this modification, a part of the non-projection part (61) on the inner wall surface of the ventilation hole (46) is an arc surface (62), and the non-projection part (61) and the protruding member the distance between the corner portion (52) is a d c at the maximum. The distance d c of the non-projecting portion (61) and the corner portion of the projection member (52), the distance d 'is shorter than (d c <d'). The distance d c of the non-projecting portion (61) and the corner portion of the projection member (52) is longer than the distance d between the side surface and the projecting portion of the projecting member (52) (60) (d c > D).

−実施形態1の変形例2−
本実施形態の集塵電極(40)では、通風孔(46)の内壁面の非投影部(61)が円弧面(62)と平面(63)とで構成され、更には非投影部(61)を構成する円弧面(62)と平面(63)が滑らかに連続していなくてもよい。
-Modification 2 of Embodiment 1
In the dust collection electrode (40) of the present embodiment, the non-projection part (61) on the inner wall surface of the ventilation hole (46) is constituted by an arc surface (62) and a flat surface (63), and further, the non-projection part (61 ) Forming the arc surface (62) and the flat surface (63) may not be smoothly continuous.

図9に示すように、通風孔(46)の中心軸に直交する断面において、非投影部(61)の形状は、中心角が90°未満の円弧と、その両端に連続する直線とで構成されている。また、この断面において、非投影部(61)のうち円弧に形成された部分は、その曲率中心Pが非投影部(61)に対向する突起部材(52)の角部の内側に位置すると共に、その曲率半径rが突起部材(52)の側面と投影部(60)との間隔dよりも長くなっている(r>d)。つまり、通風孔(46)の内壁面では、非投影部(61)の一部が内側へ湾曲した円弧面(62)となっており、円弧面(62)の両側の部分が平面(63)となっている。   As shown in FIG. 9, in the cross section orthogonal to the central axis of the ventilation hole (46), the shape of the non-projection part (61) is composed of an arc having a central angle of less than 90 ° and straight lines continuous at both ends thereof. Has been. Further, in this cross section, the portion of the non-projection portion (61) formed in the circular arc has a center of curvature P located inside the corner portion of the projecting member (52) facing the non-projection portion (61). The curvature radius r is longer than the distance d between the side surface of the projection member (52) and the projection part (60) (r> d). In other words, on the inner wall surface of the ventilation hole (46), a part of the non-projection part (61) is an arc surface (62) curved inward, and portions on both sides of the arc surface (62) are flat surfaces (63). It has become.

本変形例の集塵電極(40)では、通風孔(46)の内壁面の非投影部(61)の一部が円弧面(62)となっており、非投影部(61)と突起部材(52)の角部との距離は、最大でdとなる。そして、非投影部(61)と突起部材(52)の角部との距離dは、距離d'よりも短くなっている(d<d')。なお、非投影部(61)と突起部材(52)の角部との距離dについては、突起部材(52)の側面と投影部(60)との間隔d以上に設定することもできるし(d≧d)、間隔d以下に設定することもできる(d≦d)。 In the dust collecting electrode (40) of this modification, a part of the non-projection part (61) on the inner wall surface of the ventilation hole (46) is an arc surface (62), and the non-projection part (61) and the protruding member the distance between the corner portion (52) is a d c at the maximum. The distance d c of the non-projecting portion (61) and the corner portion of the projection member (52), the distance d 'is shorter than (d c <d'). Note that the distance d c of the non-projecting portion (61) and the corner portion of the projection member (52), may be set to a higher distance d between the side and the projection portion of the projection member (52) (60) (D c ≧ d) and the interval d or less can also be set (d c ≦ d).

《発明の実施形態2》
本発明の実施形態2について説明する。本実施形態は、上記実施形態1において、集塵電極(40)の形状を変更したものである。具体的に、本実施形態の集塵電極(40)では、通風孔(46)の内壁面の形状が、上記実施形態1と相違している。ここでは、本実施形態の集塵電極(40)について、上記実施形態1と相違する点を説明する。
<< Embodiment 2 of the Invention >>
A second embodiment of the present invention will be described. In this embodiment, the shape of the dust collection electrode (40) is changed in the first embodiment. Specifically, in the dust collection electrode (40) of the present embodiment, the shape of the inner wall surface of the ventilation hole (46) is different from that of the first embodiment. Here, the difference between the dust collecting electrode (40) of the present embodiment and the first embodiment will be described.

図10に示すように、本実施形態の集塵電極(40)では、通風孔(46)の内壁面の各非投影部(61)が、3つの平面で構成されている。具体的に、通風孔(46)の内壁面の非投影部(61)は、非投影部(61)の両隣の投影部(60)から延びる一対の平坦面(64)と、一対の平坦面(64)の一方から他方へ延びる1つの傾斜面(65)とで構成されている。つまり、通風孔(46)の中心軸に直交する断面において、非投影部(61)の形状は、2箇所で折れ曲がった折れ線状となっている。また、非投影部(61)を形成する傾斜面(65)は、隣接する平坦面(64)となす角度が45°となっている。   As shown in FIG. 10, in the dust collection electrode (40) of this embodiment, each non-projection part (61) of the inner wall face of a ventilation hole (46) is comprised by three planes. Specifically, the non-projection part (61) on the inner wall surface of the ventilation hole (46) includes a pair of flat surfaces (64) extending from the projection parts (60) adjacent to the non-projection part (61) and a pair of flat surfaces. (64) and one inclined surface (65) extending from one to the other. That is, in the cross section orthogonal to the central axis of the ventilation hole (46), the shape of the non-projection part (61) is a polygonal line bent at two places. The inclined surface (65) forming the non-projection part (61) has an angle of 45 ° with the adjacent flat surface (64).

本実施形態の集塵電極(40)では、通風孔(46)の内壁面の非投影部(61)の一部が傾斜面(65)となっており、通風孔(46)の隅部の内壁面が内側へ膨出している。このため、非投影部(61)の傾斜面(65)と突起部材(52)の角部との距離dは、距離d'よりも短くなっている(d<d')。なお、非投影部(61)の傾斜面(65)と突起部材(52)の角部との距離dについては、突起部材(52)の側面と投影部(60)との間隔d以上に設定することもできるし(d≧d)、間隔d以下に設定することもできる(d≦d)。 In the dust collection electrode (40) of this embodiment, a part of the non-projection part (61) on the inner wall surface of the ventilation hole (46) is an inclined surface (65), and the corner of the ventilation hole (46) The inner wall surface bulges inward. Therefore, the distance d c between the corner portion of the protrusion member inclined surface of the non-projection unit (61) (65) (52), the distance d 'is shorter than (d c <d'). Note that the distance d c between the corner portion of the protrusion member inclined surface of the non-projection unit (61) (65) (52), the above distance d between the side and the projection portion of the projection member (52) (60) It can be set (d c ≧ d), or can be set to be equal to or less than the interval d (d c ≦ d).

−実施形態2の変形例−
本実施形態の集塵電極(40)では、通風孔(46)の内壁面の非投影部(61)が4つ以上の平面で構成されていてもよい。ここでは、通風孔(46)の内壁面の非投影部(61)が4つの平面で構成される場合について、図11を参照しながら説明する。
-Modification of Embodiment 2-
In the dust collection electrode (40) of this embodiment, the non-projection part (61) of the inner wall surface of the ventilation hole (46) may be comprised by four or more planes. Here, the case where the non-projection part (61) of the inner wall surface of the ventilation hole (46) is constituted by four planes will be described with reference to FIG.

本変形例において、通風孔(46)の内壁面の非投影部(61)は、非投影部(61)の両隣の投影部(60)から延びる一対の平坦面(64)と、各平坦面(64)から斜め方向へ延びる一対の傾斜面(65)とで構成されている。つまり、通風孔(46)の中心軸に直交する断面において、非投影部(61)の形状は、3箇所で折れ曲がった折れ線状となっている。また、非投影部(61)を形成する傾斜面(65)は、隣接する平坦面(64)となす角度が45°未満となっている。   In this modification, the non-projection part (61) on the inner wall surface of the vent hole (46) includes a pair of flat surfaces (64) extending from the projection parts (60) adjacent to the non-projection part (61), and each flat surface. (64) and a pair of inclined surfaces (65) extending diagonally. That is, in the cross section orthogonal to the central axis of the ventilation hole (46), the shape of the non-projection part (61) is a polygonal line bent at three locations. Further, the inclined surface (65) forming the non-projection part (61) has an angle of less than 45 ° with the adjacent flat surface (64).

本実施形態の集塵電極(40)では、通風孔(46)の内壁面の非投影部(61)の一部が傾斜面(65)となっており、非投影部(61)と突起部材(52)の角部との距離は、最大でdとなる。この距離はd、距離d'よりも短くなっている(d<d')。なお、距離dについては、突起部材(52)の側面と投影部(60)との間隔d以上に設定することもできるし(d≧d)、間隔d以下に設定することもできる(d≦d)。 In the dust collection electrode (40) of this embodiment, a part of the non-projection part (61) on the inner wall surface of the ventilation hole (46) is an inclined surface (65), and the non-projection part (61) and the protruding member the distance between the corner portion (52) is a d c at the maximum. This distance is shorter than d c and distance d ′ (d c <d ′). Note that the distance d c, may be set to a higher distance d between the side and the projection portion of the projection member (52) (60) (d c ≧ d), it may be set below the interval d ( d c ≦ d).

《発明の実施形態3》
本発明の実施形態3について説明する。本実施形態は、上記実施形態1において、高圧電極(50)及び集塵電極(40)の形状を変更したものである。具体的に、本実施形態の集塵部(30)では、高圧電極(50)における突起部材(52)の角部の形状と、集塵電極(40)における通風孔(46)の内壁面の形状とが、上記実施形態1と相違している。ここでは、本実施形態の高圧電極(50)及び集塵電極(40)について、上記実施形態1と相違する点を説明する。
<< Embodiment 3 of the Invention >>
Embodiment 3 of the present invention will be described. This embodiment is obtained by changing the shapes of the high-voltage electrode (50) and the dust collecting electrode (40) in the first embodiment. Specifically, in the dust collecting portion (30) of the present embodiment, the shape of the corner of the protruding member (52) in the high voltage electrode (50) and the inner wall surface of the ventilation hole (46) in the dust collecting electrode (40) The shape is different from that of the first embodiment. Here, the difference between the high voltage electrode (50) and the dust collecting electrode (40) of the present embodiment from the first embodiment will be described.

図12に示すように、本実施形態の高圧電極(50)では、突起部材(52)の角部に面取りが施されている。この突起部材(52)の4つの角部は、それぞれの外側面が円弧面(66)となっている。具体的に、突起部材(52)の軸方向と直交する断面(即ち、通風孔(46)の中心軸に直交する断面)において、突起部材(52)の角部の形状は、1/4円弧となっている。   As shown in FIG. 12, in the high-voltage electrode (50) of the present embodiment, the corners of the protruding member (52) are chamfered. Each of the four corners of the projecting member (52) has an arcuate surface (66) on the outer surface. Specifically, in the cross section orthogonal to the axial direction of the protrusion member (52) (that is, the cross section orthogonal to the central axis of the vent hole (46)), the shape of the corner of the protrusion member (52) is 1/4 arc It has become.

本実施形態の集塵電極(40)において、通風孔(46)の隅部の内壁面は、円弧面となっている。通風孔(46)の中心軸に直交する断面において、通風孔(46)の隅部の内壁面の形状は、1/4円弧と、その両端から接線方向へ延びる直線とで構成されている。また、この断面において、通風孔(46)の隅部のうち1/4円弧に形成された部分の曲率中心Pは、この隅部に対向する突起部材(52)の角部の曲率中心Pと一致している。更に、通風孔(46)の隅部の円弧面(62)の曲率半径rと、突起部材(52)の角部の円弧面(66)の曲率半径rとの差は、通風孔(46)の内壁面のうち平坦な部分と突起部材(52)の側面のうち平坦な部分との間隔dと等しくなっている(r−r=d)。 In the dust collection electrode (40) of the present embodiment, the inner wall surface at the corner of the ventilation hole (46) is an arc surface. In the cross section orthogonal to the central axis of the vent hole (46), the shape of the inner wall surface at the corner of the vent hole (46) is composed of a quarter arc and a straight line extending tangentially from both ends thereof. Further, in this cross section, the center of curvature P of the corner portion of the vent hole (46) formed in the ¼ arc is the curvature center P of the corner portion of the projecting member (52) facing this corner portion. Match. Furthermore, the curvature radius r o of the circular arc surface of the corner portion of the vent hole (46) (62), the difference between the radius of curvature r i of the arc surface of the corner portion of the projection member (52) (66), ventilation holes ( a flat portion of the inner wall surface 46) is equal to the distance d between the flat portion of the side surface of the projecting member (52) (r o -r i = d).

本実施形態では、高圧電極(50)の突起部材(52)の角部に面取りが施されているため、突起部材(52)の角部への電界の集中が緩和される。このため、通風孔(46)の壁面と突起部材(52)の側面との間隔を平均化することによってだけでなく、突起部材(52)の角部への電界の集中を緩和することによっても、通風孔(46)の壁面と突起部材(52)の間に形成される電界の強度を均一化することができる。従って、本実施形態によれば、通風孔(46)の壁面と突起部材(52)の間に形成される電界の強度を、より一層均一化することができる。   In the present embodiment, since the chamfer is applied to the corner of the protruding member (52) of the high-voltage electrode (50), the concentration of the electric field on the corner of the protruding member (52) is reduced. For this reason, not only by averaging the distance between the wall surface of the vent hole (46) and the side surface of the projection member (52), but also by reducing the concentration of the electric field on the corner of the projection member (52). The strength of the electric field formed between the wall surface of the ventilation hole (46) and the protruding member (52) can be made uniform. Therefore, according to the present embodiment, the strength of the electric field formed between the wall surface of the ventilation hole (46) and the protruding member (52) can be made more uniform.

−実施形態3の変形例−
本実施形態の集塵電極(40)では、図13に示すように、突起部材(52)の角部の外側面が1つの傾斜面(67)で構成されていてもよい。この傾斜面(67)は、突起部材(52)の側面のうち通風孔(46)の内壁面と平行な部分に対して45°の角度をなしている。
-Modification of Embodiment 3-
In the dust collection electrode (40) of this embodiment, as shown in FIG. 13, the outer surface of the corner | angular part of a projection member (52) may be comprised by one inclined surface (67). The inclined surface (67) forms an angle of 45 ° with respect to a portion of the side surface of the projecting member (52) parallel to the inner wall surface of the ventilation hole (46).

《その他の実施形態》
上記の各実施形態の空気清浄機(10)では、集塵部(30)を以下で説明するように構成してもよい。
<< Other Embodiments >>
In the air cleaner (10) of each of the embodiments described above, the dust collection unit (30) may be configured as described below.

−第1変形例−
上記各実施形態の集塵部(30)において、集塵電極(40)の通風孔(46)の断面形状と、高圧電極(50)の突起部材(52)の断面形状とは、四角形以外の多角形(例えば、三角形や五角形など)であってもよい。ここでは、上記実施形態1の集塵部(30)において、通風孔(46)及び突起部材(52)の断面形状を正六角形状とした場合について説明する。
-First modification-
In the dust collecting part (30) of each of the embodiments described above, the cross-sectional shape of the ventilation hole (46) of the dust collecting electrode (40) and the cross-sectional shape of the protruding member (52) of the high-voltage electrode (50) are other than a quadrangle. It may be a polygon (for example, a triangle or a pentagon). Here, the case where the cross-sectional shape of the ventilation hole (46) and the protruding member (52) is a regular hexagonal shape in the dust collecting part (30) of the first embodiment will be described.

図14に示すように、本変形例の集塵電極(40)は、全体形状がいわゆるハニカム状となっている。そして、この集塵電極(40)に形成された多数の通風孔(46)は、それぞれの断面が正六角形状となっている。また、本変形例の高圧電極(50)では、突起部材(52)の断面形状が正六角形状となっている。この突起部材(52)は、各側面が通風孔(46)の内壁面と平行になる姿勢で、通風孔(46)と同軸上に配置されている。   As shown in FIG. 14, the dust collection electrode (40) of the present modification has a so-called honeycomb shape as a whole. The numerous ventilation holes (46) formed in the dust collection electrode (40) have a regular hexagonal cross section. Moreover, in the high voltage electrode (50) of this modification, the cross-sectional shape of the protruding member (52) is a regular hexagon. The projecting member (52) is arranged coaxially with the vent hole (46) so that each side surface is parallel to the inner wall surface of the vent hole (46).

通風孔(46)の内壁面では、突起部材(52)の側面の投影面となる部分が投影部(60)を構成し、突起部材(52)の側面の投影面とならない部分(図14においてハッチングを付した部分)が非投影部(61)を構成している。通風孔(46)の中心軸に直交する断面において、投影部(60)の形状は直線となる一方、非投影部(61)の形状は中心角が60°の円弧となっている。また、この断面において、円弧となった非投影部(61)は、その曲率中心Pが非投影部(61)に対面する突起部材(52)の角部と一致すると共に、その曲率半径rが突起部材(52)の側面と投影部(60)との間隔dと等しくなっている。つまり、通風孔(46)の内壁面では、非投影部(61)の全体が内側へ湾曲した円弧面(62)となっている。   On the inner wall surface of the ventilation hole (46), the portion that becomes the projection surface on the side surface of the projection member (52) constitutes the projection portion (60), and the portion that does not become the projection surface on the side surface of the projection member (52) (in FIG. The hatched part) constitutes the non-projection part (61). In the cross section perpendicular to the central axis of the ventilation hole (46), the shape of the projection part (60) is a straight line, while the shape of the non-projection part (61) is an arc having a central angle of 60 °. In addition, in this cross section, the non-projection part (61) that is an arc has a center of curvature P that coincides with a corner of the protruding member (52) facing the non-projection part (61), and a radius of curvature r thereof. It is equal to the distance d between the side surface of the projecting member (52) and the projection part (60). That is, on the inner wall surface of the ventilation hole (46), the entire non-projection portion (61) is an arc surface (62) curved inward.

従来のように通風孔(46)の内壁面が突起部材(52)の側面と平行な平面のみで構成される場合において、図14に二点鎖線で示す通風孔(46)の隅部の内壁面と突起部材(52)の角部との距離は、最大でd'となる。一方、本変形例の集塵電極(40)では、通風孔(46)の隅部の内壁面を含む非投影部(61)が円弧面(62)となっており、非投影部(61)と突起部材(52)の角部との距離は、非投影部(61)の全体に亘ってdとなる。そして、非投影部(61)と突起部材(52)の角部との距離dは、距離d'よりも短くなっている(d<d')。なお、非投影部(61)と突起部材(52)の角部との距離dは、円弧面(62)である非投影部(61)の曲率半径rと等しい(d=r)。 In the case where the inner wall surface of the vent hole (46) is configured only by a plane parallel to the side surface of the projecting member (52) as in the prior art, the inside of the corner of the vent hole (46) shown by the two-dot chain line in FIG. The maximum distance between the wall surface and the corner of the protruding member (52) is d ′. On the other hand, in the dust collection electrode (40) of this modification, the non-projection part (61) including the inner wall surface at the corner of the ventilation hole (46) is an arc surface (62), and the non-projection part (61) the distance between the corner portion of the projection member (52) is a d c over the entire non-projection unit (61). The distance d c of the non-projecting portion (61) and the corner portion of the projection member (52), the distance d 'is shorter than (d c <d'). The distance d c of the non-projecting portion (61) and the corner portion of the projection member (52) is equal to the radius of curvature r of the non-projecting portion is arcuate surface (62) (61) (d c = r).

−第2変形例−
上記各実施形態の集塵部(30)は、集塵電極(40)と高圧電極(50)を互いに嵌り込む構造となっていたが、これに代えて、高圧電極(50)のみが集塵電極(40)に嵌り込む構造としてもよい。ここでは、本変形例を上記実施形態1の集塵電極(40)及び高圧電極(50)に適用したものについて、図15,図16を参照しながら説明する。
-Second modification-
The dust collecting part (30) of each of the above embodiments has a structure in which the dust collecting electrode (40) and the high voltage electrode (50) are fitted to each other, but instead, only the high voltage electrode (50) is dust collecting. It is good also as a structure fitted in an electrode (40). Here, what applied this modification to the dust collection electrode (40) and high voltage electrode (50) of the said Embodiment 1 is demonstrated, referring FIG. 15, FIG.

本変形例の集塵電極(40)は、全体として直方体状ないし厚板状に形成された1つの基台部材(41)を備えている。基台部材(41)は、枠体(43)と複数の縦仕切部材(44)及び複数の横仕切部材(45)とを備えている。つまり、本変形例の集塵電極(40)は、上記実施形態1の多数の突起部材(42)を備えておらず、単なる格子状に形成されている。   The dust collecting electrode (40) of the present modification includes one base member (41) formed in a rectangular parallelepiped shape or a thick plate shape as a whole. The base member (41) includes a frame (43), a plurality of vertical partition members (44), and a plurality of horizontal partition members (45). That is, the dust collection electrode (40) of this modification is not provided with the large number of projecting members (42) of the first embodiment, and is formed in a simple lattice shape.

一方、本変形例の高圧電極(50)は、上記実施形態1と同様に、全体として矩形板状に形成された1つの基台部材(51)と、基台部材(51)に突設された多数の突起部材(52)とを備えている。この高圧電極(50)の基台部材(51)は、空気の流れ方向の厚さが実施形態1のものに比べて薄くなっている。具体的に、基台部材(51)は、枠体(53)と複数の縦仕切部材(54)及び複数の横仕切部材(55)とを備えているものの、空気の流れ方向の厚さが薄く形成されている。つまり、本変形例の集塵電極(40)には突起部材が設けられていないため、高圧電極(50)の枠体(53)、縦仕切部材(54)及び横仕切部材(55)は、多数の突起部材(52)を保持し得る程度の厚さに形成されている。   On the other hand, the high-voltage electrode (50) of the present modified example projects from one base member (51) formed as a rectangular plate as a whole and the base member (51), as in the first embodiment. And a large number of protruding members (52). The base member (51) of the high-voltage electrode (50) has a smaller thickness in the air flow direction than that of the first embodiment. Specifically, although the base member (51) includes a frame (53), a plurality of vertical partition members (54), and a plurality of horizontal partition members (55), the thickness in the air flow direction is Thinly formed. That is, since the dust collecting electrode (40) of this modification is not provided with a protruding member, the frame (53), the vertical partition member (54) and the horizontal partition member (55) of the high-voltage electrode (50) It is formed to a thickness that can hold a large number of protruding members (52).

従って、本変形例の集塵部(30)では、高圧電極(50)の突起部材(52)のみが集塵電極(40)の通風孔(46)の内部に延びている。その他、集塵電極(40)及び高圧電極(50)が共に導電性樹脂で形成されている点などは、実施形態1と同様である。   Therefore, in the dust collection part (30) of this modification, only the protruding member (52) of the high-voltage electrode (50) extends into the ventilation hole (46) of the dust collection electrode (40). In addition, the point that the dust collection electrode (40) and the high voltage electrode (50) are both formed of a conductive resin is the same as that of the first embodiment.

なお、以上の実施形態は、本質的に好ましい例示であって、本発明、その適用物、あるいはその用途の範囲を制限することを意図するものではない。   In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or its use.

以上説明したように、本発明は、帯電した塵埃を捕集する集塵装置について有用である。   As described above, the present invention is useful for a dust collector that collects charged dust.

実施形態1の空気清浄機の全体構成を示す概略斜視図である。It is a schematic perspective view which shows the whole structure of the air cleaner of Embodiment 1. FIG. 実施形態1の空気清浄機の全体構成を示す概略側面図である。It is a schematic side view which shows the whole structure of the air cleaner of Embodiment 1. 実施形態1の集塵部を示す斜視図である。FIG. 3 is a perspective view showing a dust collection unit according to the first embodiment. 実施形態1の集塵部の一部を拡大して示す斜視図である。It is a perspective view which expands and shows a part of dust collection part of Embodiment 1. FIG. 実施形態1の集塵部の一部を拡大して示す断面側面図である。It is a cross-sectional side view which expands and shows a part of dust collection part of Embodiment 1. FIG. 実施形態1の集塵部の一部を拡大して示す正面図である。It is a front view which expands and shows a part of dust collection part of Embodiment 1. FIG. 実施形態1の集塵部の一部を拡大して示す正面図である。It is a front view which expands and shows a part of dust collection part of Embodiment 1. FIG. 実施形態1の変形例1の集塵部の一部を拡大して示す正面図である。It is a front view which expands and shows a part of dust collection part of the modification 1 of Embodiment 1. FIG. 実施形態1の変形例2の集塵部の一部を拡大して示す正面図である。It is a front view which expands and shows a part of dust collection part of the modification 2 of Embodiment 1. FIG. 実施形態2の集塵部の一部を拡大して示す正面図である。It is a front view which expands and shows a part of dust collection part of Embodiment 2. FIG. 実施形態2の変形例の集塵部の一部を拡大して示す正面図である。It is a front view which expands and shows a part of dust collection part of the modification of Embodiment 2. FIG. 実施形態3の集塵部の一部を拡大して示す正面図である。It is a front view which expands and shows a part of dust collection part of Embodiment 3. 実施形態3の変形例の集塵部の一部を拡大して示す正面図である。It is a front view which expands and shows a part of dust collection part of the modification of Embodiment 3. その他の実施形態の第1変形例の集塵部の一部を拡大して示す正面図である。It is a front view which expands and shows a part of dust collection part of the 1st modification of other embodiment. その他の実施形態の第2変形例の集塵部の一部を拡大して示す斜視図である。It is a perspective view which expands and shows a part of dust collection part of the 2nd modification of other embodiment. その他の実施形態の第2変形例の集塵部の一部を拡大して示す断面側面図である。It is a section side view expanding and showing a part of dust collection part of the 2nd modification of other embodiments. 従来の集塵装置の一部を拡大して示す正面図である。It is a front view which expands and shows a part of conventional dust collector.

符号の説明Explanation of symbols

40 集塵電極
46 通風孔(通気孔)
50 対向電極
52 突起部材(突起部)
40 Dust collection electrode
46 Ventilation holes
50 Counter electrode
52 Protruding member (protruding part)

Claims (7)

被処理気体を流すための通気孔(46)が形成された集塵電極(40)と、該集塵電極(40)の通気孔(46)に挿通される突起部(52)が形成された対向電極(50)とを備え、上記集塵電極(40)と対向電極(50)の間に電位差を与えることによって、被処理気体中の帯電した塵埃を上記通気孔(46)の壁面に付着させて捕集する集塵装置であって、
上記集塵電極(40)の通気孔(46)は、その断面形状が多角形状となり、
上記対向電極(50)の突起部(52)は、その断面形状が上記通気孔(46)の断面形状と同数の頂点を有する多角形状となり、該突起部(52)の角部が上記通気孔(46)の隅部と対向するように配置され、
上記集塵電極(40)では、上記通気孔(46)の隅部の壁面が、該隅部に対向する突起部(52)の角部へ向かって膨出している
ことを特徴とする集塵装置。
A dust collecting electrode (40) having a vent hole (46) for flowing the gas to be treated and a projection (52) inserted through the vent hole (46) of the dust collecting electrode (40) were formed. A counter electrode (50) is provided, and by applying a potential difference between the dust collection electrode (40) and the counter electrode (50), charged dust in the gas to be treated is attached to the wall surface of the vent hole (46). A dust collector that collects
The ventilation hole (46) of the dust collection electrode (40) has a polygonal cross-sectional shape,
The projecting portion (52) of the counter electrode (50) has a polygonal shape with a cross-sectional shape having the same number of vertices as the cross-sectional shape of the vent hole (46), and the corner portion of the projecting portion (52) is the vent hole. (46) is arranged to face the corner,
In the dust collection electrode (40), the wall surface at the corner of the vent hole (46) bulges toward the corner of the projection (52) facing the corner. apparatus.
請求項1において、
上記通気孔(46)の隅部の壁面は、その断面形状が内向きに湾曲した円弧となっている
ことを特徴とする集塵装置。
In claim 1,
The dust collector according to claim 1, wherein a wall surface at a corner of the vent hole (46) is an arc whose cross-sectional shape is curved inward.
請求項2において、
上記通気孔(46)の隅部の壁面の断面形状は、円弧部分の端部における接線が該円弧部分の端部に連続する直線部分と重なる形状となっている
ことを特徴とする集塵装置。
In claim 2,
The cross-sectional shape of the wall surface at the corner of the vent hole (46) is such that the tangent at the end of the arc portion overlaps with the straight portion continuing to the end of the arc portion. .
請求項2において、
上記通気孔(46)の隅部の壁面の断面形状は、該隅部と対向する突起部(52)の角部を曲率中心とする円弧となっている
ことを特徴とする集塵装置。
In claim 2,
The dust collector according to claim 1, wherein the cross-sectional shape of the wall surface at the corner of the vent hole (46) is an arc centering on the corner of the protrusion (52) facing the corner.
請求項1において、
上記通気孔(46)の隅部の壁面は、その断面形状が複数の頂点を有する折れ線状となっている
ことを特徴とする集塵装置。
In claim 1,
The dust collector according to claim 1, wherein the wall surface at the corner of the vent hole (46) has a polygonal line shape having a plurality of vertices in cross section.
請求項1乃至5の何れか1つにおいて、
上記対向電極(50)の突起部(52)の角部に面取りが施されている
ことを特徴とする集塵装置。
In any one of claims 1 to 5,
A dust collector, wherein a chamfer is applied to a corner of the protrusion (52) of the counter electrode (50).
請求項1乃至6の何れか1つにおいて、
上記集塵電極(40)の材質が導電性樹脂となっている
ことを特徴とする集塵装置。
In any one of Claims 1 thru | or 6,
A dust collector, wherein the dust collecting electrode (40) is made of a conductive resin.
JP2007216747A 2007-08-23 2007-08-23 Dust collector Expired - Fee Related JP4941173B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8707761B2 (en) 2010-10-28 2014-04-29 Denso Corporation Particulate matter detection element
JPWO2017085791A1 (en) * 2015-11-17 2017-11-16 富士電機株式会社 Electric dust collector and exhaust gas purification system
JP2018140346A (en) * 2017-02-28 2018-09-13 株式会社富士通ゼネラル Electric dust collector

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57127460A (en) * 1981-01-29 1982-08-07 Nippon Kokan Kk <Nkk> Electric dust collector
JP2001121033A (en) * 1999-10-27 2001-05-08 Mitsubishi Electric Corp Electric precipitator
JP2005307831A (en) * 2004-04-20 2005-11-04 Toyota Motor Corp Exhaust gas purifying device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57127460A (en) * 1981-01-29 1982-08-07 Nippon Kokan Kk <Nkk> Electric dust collector
JP2001121033A (en) * 1999-10-27 2001-05-08 Mitsubishi Electric Corp Electric precipitator
JP2005307831A (en) * 2004-04-20 2005-11-04 Toyota Motor Corp Exhaust gas purifying device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8707761B2 (en) 2010-10-28 2014-04-29 Denso Corporation Particulate matter detection element
JPWO2017085791A1 (en) * 2015-11-17 2017-11-16 富士電機株式会社 Electric dust collector and exhaust gas purification system
JP2018140346A (en) * 2017-02-28 2018-09-13 株式会社富士通ゼネラル Electric dust collector

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