JP3746253B2 - Fan filter unit - Google Patents

Fan filter unit Download PDF

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Publication number
JP3746253B2
JP3746253B2 JP2002209068A JP2002209068A JP3746253B2 JP 3746253 B2 JP3746253 B2 JP 3746253B2 JP 2002209068 A JP2002209068 A JP 2002209068A JP 2002209068 A JP2002209068 A JP 2002209068A JP 3746253 B2 JP3746253 B2 JP 3746253B2
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JP
Japan
Prior art keywords
blade
centrifugal fan
fan
plate side
filter unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2002209068A
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Japanese (ja)
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JP2004052615A (en
Inventor
和郎 荻野
和也 大森
Original Assignee
松下エコシステムズ株式会社
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Priority to JP2002209068A priority Critical patent/JP3746253B2/en
Publication of JP2004052615A publication Critical patent/JP2004052615A/en
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Description

【0001】
【発明の属する技術分野】
本発明は、主としてクリーンルーム内で建物の集塵用に使用されるファンフィルタユニットに関する。
【0002】
【従来の技術】
従来、この種の遠心ファン104は、一例として図4または図5に示すように、ベルマウス吸込口100を持つ側板101と、主板102を有し、側板101と主板102で挟まれたブレード103を有している。また吸込側にインデューサ105を持つ場合もある。吸込口より空気を吸引し、ブレード103により昇圧される構造となっている。通常、ブレード103の出口角は軸方向に同一になっているが、出口流れ軸方向に均一ではない。また、このような遠心ファン104を用いたファンフィルタユニットは、一例として図6に示すように、吸込口107にガード108を有し、電動機109で駆動される遠心ファン104より空気を吸引し、その周囲にファンフィルタユニットの吐出口106が開口した箱状の本体110を有し、遠心ファン104の下流に集塵フィルタ111を有し、室内に均一に空気を吐出する構造となっている。
【0003】
【発明が解決しようとする課題】
このようなファンフィルタユニットは、クリーンルームの天井のみでなく、装置に組み入れられて用いられることが多く、作業者の近くにあり騒音が大きいという課題があり、商品が低騒音であることが要求されている。
【0004】
本発明はこのような課題を解決するものであり、騒音が少ないファンフィルタユニットを提供することを目的とする。
【0005】
【課題を解決するための手段】
本発明のファンフィルタユニットは上記目的を達成するために、かつブレード入り口部にブレードと共に回転するインデューサを有し、ブレードの出口が回転方向に対し後向きで、かつブレードの内径部または内径部より外径側の間の点より外径部までが、軸方向の断面が同一でなく、主板側に空気が多く流れ昇圧されるように主板側から側板側までのブレードの出口角の差を5度から30度の間で出口角度が主板側より側板側に向かって順次小さくなるよう、外周部に向かって捻られた形状を有する遠心ファンとしたものである。
【0006】
本発明によれば、風量を低減することなく低騒音な遠心ファンを提供することができる。
【0007】
また他の手段は、ブレードの出口が回転方向に対し後向きで、かつブレード入り口部にブレードと共に回転するインデューサを有し、かつブレードの内径部または内径部より外径側の間の点より外径部までが、軸方向の断面が同一でなく、出口角度が主板側より側板側に向かって順次小さくなるよう、外周部に向かって捻られた形状を有する遠心ファンを有し、周囲に箱状の本体を有し、さらに吐出口に集塵フィルタを有したファンフィルタユニットとした構成としたものである。
【0008】
本発明によれば、風量を低減することなく低騒音な空気清浄効果を持つファンフィルタユニットを提供することができる。
【0009】
【発明の実施の形態】
本発明は、ブレードの出口が回転方向に対し後向きで、かつブレード入り口部にブレードと共に回転するインデューサを有し、かつブレードの内径部または内径部より外径側の間の点より外径部までが、軸方向の断面が同一でなく、主板側に空気が多く流れ昇圧されるように主板側から側板側までのブレードの出口角の差を5度から30度の間で出口角度が主板側より側板側に向かって順次小さくなるよう、外周部に向かって捻られた形状を有する遠心ファンとしたものであり、空気の流れに抵抗なく送風昇圧作用を行うので風量を低減することなく、また乱流渦の発生は小さいので低騒音な遠心ファンを提供することができる。
【0010】
また他の手段は、ブレードの出口が回転方向に対し後向きで、かつブレード入り口部にブレードと共に回転するインデューサを有し、かつブレードの内径部または内径部より外径側の間の点より外径部までが、軸方向の断面が同一でなく、出口角度が主板側より側板側に向かって順次小さくなるよう、外周部に向かって捻られた形状を有する遠心ファンを有し、周囲に箱状の本体を有し、さらに吐出口に集塵フィルタを有したファンフィルタユニットとした構成としたものであり、ファン内部の空気の流れに抵抗なく送風昇圧作用を行い、風量を低減することなく乱流渦が小さくなり低騒音となるのみでなく、ファン出口の流れも吸込側に行きフィルタに直接当たることなく衝突時の剥離音が小さくファンフィルタユニットとしても低騒音の商品を提供することができる。
【0011】
以下、本発明の実施例について図面を参照しながら説明する。
【0012】
【実施例】
(実施例1)
図1および図2に示すように、遠心ファン1は、出口角が90度より小さい後向きブレード2と吸込ベルマウス9を有する側板3と主板4より構成され、ブレード2は側板3と主板4とで挟まれるように固定されている。またブレード2の入り口部にはインデューサ5がブレードに取り付けられている。羽根車1が回転すると吸込口10から吸い込まれた空気はインデューサ5によって誘引昇圧されブレード2に沿って外周側に流れブレード出口から遠心ファン1の外に吐出される。このとき、ブレード2は、内径部または内径部より外径側の間の点より外径部までが、軸方向に断面が同一でなく、主板側出口角Aより側板側出口角Bが側板3に向かって順次小さくなるよう、外周部に向かって捻られた形状を有する遠心ファンとしているので、通常主板側に空気が多く流れ昇圧される状態に合わせて出口角度を主板側を大きく側板側を小さくしている。このように空気の流れに抵抗なく送風昇圧作用を行うので風量を低減することなく、また乱流渦の発生は小さいので低騒音な遠心ファンを提供できる。この捻りの程度つまり主板側から側板側までのブレードの出口角の差は5度から30度の間が性能上最適である。また、インデューサ5によって主板側への送風作用が強くなり、ブレード出口角の捻り効果は、インデューサ付遠心ファンの方が大きくなるが、インデューサがなくても効果はある。
【0013】
(実施例2)
また、図3に示すように、電動機8によって駆動される遠心ファン1を有し、その遠心ファン1のブレード2の出口は回転方向に対し後向きで、かつブレード2の入口部にブレード2と共に回転するインデューサ5を有し、かつブレード2の内径部または内径部より外径側の間の点より外径部までが、軸方向の断面が同一でなく、出口角度が主板側より側板側に向かって順次小さくなるよう、外周部に向かって捻られた形状で構成され、上記遠心ファン1の周囲に、箱状の本体6を有し、さらに本体1の吐出口に集塵フィルタ7を有したファンフィルタユニットとした構成としたものであり、遠心ファン1の吸込空気の流れに抵抗なく送風昇圧作用を行い、風量を低減することなく乱流渦が小さくなり低騒音となるのみでなく、ファン出口の流れも集塵フィルタ7に直接当たることなく、一旦本体1の内部の吸込側に向かい、本体1の内部で均一化され、その後、集塵フィルタ7に均一化された空気を当てることとなり、衝突時の剥離音が小さくファンフィルタユニットとしても低騒音の商品を提供することができる。
【0014】
【発明の効果】
以上の実施例から明かなように本発明によれば、遠心ファンのブレードの出口が回転方向に対し後向きで、かつブレードの内径部または内径部より外径側の間の点より外径部までが、軸方向の断面が同一でなく、主板側に空気が多く流れ昇圧されるように主板側から側板側までのブレードの出口角の差を5度から30度の間で出口角度が主板側より側板側に向かって順次小さくなるよう、外周部に向かって捻られた形状を有するので、また電動機で駆動される上記遠心ファンの周囲に箱状の本体を有し、さらに吐出口に集塵フィルタを有したファンフィルタユニット羽根車で送風作用と集塵作用を兼ねる作用を行うので、風量を減じることなく低騒音なファンまたはファンフィルタユニットを提供できる。
【図面の簡単な説明】
【図1】本発明の実施例1の遠心ファンの斜視図
【図2】本発明の実施例1の遠心ファンの正面図
【図3】本発明の実施例2のファンフィルタユニットの側断面図
【図4】従来の遠心ファンの正面図
【図5】従来の遠心ファンの斜視図
【図6】従来のファンフィルタユニットの側断面図
【符号の説明】
1 遠心ファン
2 ブレード
3 側板
4 主板
5 インデューサ
6 本体
7 集塵フィルタ
100 吸込口
101 側板
102 主板
103 ブレード
104 遠心ファン
105 インデューサ
106 吐出口
107 吸込口
108 ガード
109 電動機
110 本体
111 集塵フィルタ
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fan filter unit mainly used for dust collection in a clean room.
[0002]
[Prior art]
Conventionally, this type of centrifugal fan 104 has a side plate 101 having a bell mouth suction port 100 and a main plate 102 as shown in FIG. 4 or 5 as an example, and a blade 103 sandwiched between the side plate 101 and the main plate 102. have. There may also be an inducer 105 on the suction side. Air is sucked from the suction port, and the pressure is increased by the blade 103. Normally, the exit angle of the blade 103 is the same in the axial direction, but is not uniform in the outlet flow axial direction. In addition, as shown in FIG. 6 as an example, the fan filter unit using the centrifugal fan 104 has a guard 108 at the suction port 107 and sucks air from the centrifugal fan 104 driven by the electric motor 109. A box-shaped main body 110 having a discharge port 106 of the fan filter unit opened around it and a dust collecting filter 111 downstream of the centrifugal fan 104 are configured to discharge air uniformly into the room.
[0003]
[Problems to be solved by the invention]
Such a fan filter unit is often used not only in the ceiling of a clean room but also in a device, and there is a problem that the noise is close to the worker and the product is required to be low in noise. ing.
[0004]
The present invention solves such problems, and an object thereof is to provide a fan filter unit with low noise.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the fan filter unit of the present invention has an inducer that rotates together with the blade at the blade inlet portion, the outlet of the blade is rearward with respect to the rotation direction, and the inner diameter portion or inner diameter portion of the blade. The cross section in the axial direction is not the same from the point between the outer diameter sides to the outer diameter portion, and the difference in the exit angle of the blade from the main plate side to the side plate side is increased by 5 so that a large amount of air flows to the main plate side and the pressure is increased. The centrifugal fan has a shape twisted toward the outer peripheral portion so that the exit angle gradually decreases from the main plate side toward the side plate side between 30 degrees and 30 degrees .
[0006]
According to the present invention, a low-noise centrifugal fan can be provided without reducing the air volume.
[0007]
Another means is that the outlet of the blade is rearward with respect to the rotation direction and has an inducer that rotates together with the blade at the blade inlet, and is outside the inner diameter portion of the blade or a point between the inner diameter portion and the outer diameter side. A centrifugal fan having a shape that is twisted toward the outer periphery so that the cross section in the axial direction is not the same up to the diameter, and the exit angle gradually decreases from the main plate side toward the side plate side. The fan filter unit has a cylindrical main body and further has a dust collection filter at the discharge port.
[0008]
According to the present invention, it is possible to provide a fan filter unit having a low-noise air cleaning effect without reducing the air volume.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The present invention has an inducer in which the exit of the blade is rearward with respect to the rotation direction and rotates together with the blade at the blade entrance portion, and the outer diameter portion from the inner diameter portion of the blade or a point between the inner diameter portion and the outer diameter side. However, the difference in the exit angle of the blade from the main plate side to the side plate side is between 5 degrees and 30 degrees so that the air flow is increased and pressure is increased on the main plate side. It is a centrifugal fan having a shape twisted toward the outer peripheral part so that it gradually decreases from the side toward the side plate side, and without blowing the air flow without resistance to the air flow, without reducing the air volume, Moreover, since the generation of turbulent vortices is small, a low noise centrifugal fan can be provided.
[0010]
Another means is that the outlet of the blade is rearward with respect to the rotation direction and has an inducer that rotates together with the blade at the blade inlet, and is outside the inner diameter portion of the blade or a point between the inner diameter portion and the outer diameter side. A centrifugal fan having a shape that is twisted toward the outer periphery so that the cross section in the axial direction is not the same up to the diameter, and the exit angle gradually decreases from the main plate side toward the side plate side. The fan filter unit has a cylindrical main body and a dust collection filter at the discharge port, and performs air pressure boosting without resistance to the air flow inside the fan, without reducing the air volume. Not only does the turbulent vortex become smaller and the noise becomes lower, but the fan outlet flow also goes to the suction side and does not directly hit the filter. It is possible to provide the goods.
[0011]
Embodiments of the present invention will be described below with reference to the drawings.
[0012]
【Example】
Example 1
As shown in FIGS. 1 and 2, the centrifugal fan 1 is composed of a rear plate 2 having an outlet angle smaller than 90 degrees, a side plate 3 having a suction bell mouth 9, and a main plate 4, and the blade 2 includes the side plate 3 and the main plate 4. It is fixed so as to be sandwiched between. An inducer 5 is attached to the blade at the entrance of the blade 2. When the impeller 1 rotates, the air sucked from the suction port 10 is attracted and boosted by the inducer 5, flows to the outer peripheral side along the blade 2, and is discharged out of the centrifugal fan 1 from the blade outlet. At this time, in the blade 2, the cross section in the axial direction from the inner diameter portion or a point between the inner diameter portion and the outer diameter side is not the same in the axial direction, and the side plate side outlet angle B is larger than the main plate side outlet angle A. The centrifugal fan has a shape that is twisted toward the outer periphery so that the outlet angle is gradually increased toward the outer periphery. It is small. Thus, since the air pressure boosting action is performed without resistance to the air flow, it is possible to provide a low-noise centrifugal fan without reducing the air volume and since the generation of turbulent vortices is small. The degree of twist, that is, the difference in the exit angle of the blade from the main plate side to the side plate side, is optimal in terms of performance between 5 and 30 degrees. The inducer 5 strengthens the air blowing action toward the main plate, and the twisting effect of the blade exit angle is greater in the centrifugal fan with an inducer, but it is effective even without an inducer.
[0013]
(Example 2)
Further, as shown in FIG. 3, the centrifugal fan 1 is driven by an electric motor 8, the outlet of the blade 2 of the centrifugal fan 1 is rearward with respect to the rotation direction, and rotates together with the blade 2 at the inlet portion of the blade 2. The cross section in the axial direction is not the same from the inner diameter part of the blade 2 or the point between the inner diameter part and the outer diameter side to the outer diameter part, and the outlet angle is from the main plate side to the side plate side. It is configured in a shape twisted toward the outer periphery so as to gradually decrease toward the outer periphery, and has a box-shaped main body 6 around the centrifugal fan 1, and a dust collection filter 7 at the discharge port of the main body 1. The fan filter unit is configured to perform the air pressure boosting operation without resistance to the flow of the suction air of the centrifugal fan 1, and not only reduces the turbulent flow vortex without reducing the air volume but also reduces the noise. Fan exit Without directly hitting the dust collection filter 7, it goes to the suction side inside the main body 1 and is made uniform inside the main body 1, and then the uniformed air is applied to the dust collection filter 7. A product with low noise at the time and low noise can be provided as a fan filter unit.
[0014]
【The invention's effect】
As is apparent from the above embodiments, according to the present invention, the outlet of the blade of the centrifugal fan is rearward with respect to the rotational direction and from the inner diameter part of the blade or a point between the inner diameter part and the outer diameter side to the outer diameter part. However, the difference in the exit angle of the blade from the main plate side to the side plate side is between 5 degrees and 30 degrees so that the air flow is increased and pressure is increased on the main plate side, and the exit angle is on the main plate side. Since it has a shape twisted toward the outer periphery so that it gradually becomes smaller toward the side plate, it also has a box-shaped body around the centrifugal fan driven by an electric motor, and further collects dust at the discharge port. Since the fan filter unit impeller having a filter performs both the air blowing action and the dust collecting action, a low noise fan or fan filter unit can be provided without reducing the air volume.
[Brief description of the drawings]
FIG. 1 is a perspective view of a centrifugal fan according to a first embodiment of the present invention. FIG. 2 is a front view of the centrifugal fan according to the first embodiment of the present invention. FIG. 4 is a front view of a conventional centrifugal fan. FIG. 5 is a perspective view of a conventional centrifugal fan. FIG. 6 is a side sectional view of a conventional fan filter unit.
DESCRIPTION OF SYMBOLS 1 Centrifugal fan 2 Blade 3 Side plate 4 Main plate 5 Inducer 6 Main body 7 Dust collection filter 100 Suction port 101 Side plate 102 Main plate 103 Blade 104 Centrifugal fan 105 Inducer 106 Discharge port 107 Suction port 108 Guard 109 Motor 110 Main body 111 Dust collection filter

Claims (2)

ブレードの出口が回転方向に対し後向きで、かつブレード入り口部にブレードと共に回転するインデューサを有し、かつブレードの内径部または内径部より外径側の間の点より外径部までが、軸方向の断面が同一でなく、主板側に空気が多く流れ昇圧されるように主板側から側板側までのブレードの出口角の差を5度から30度の間で出口角度が主板側より側板側に向かって順次小さくなるよう、外周部に向かって捻られた形状を有する遠心ファン。The blade outlet is rearward with respect to the rotation direction, and the blade inlet has an inducer that rotates together with the blade. The inner diameter portion of the blade or a point between the inner diameter portion and the outer diameter side to the outer diameter portion is a shaft. The cross sections in the directions are not the same, and the difference in the exit angle of the blade from the main plate side to the side plate side is between 5 degrees and 30 degrees so that the air flows and pressure is increased on the main plate side. A centrifugal fan having a shape twisted toward the outer peripheral portion so as to gradually decrease toward the outer periphery. 電動機で駆動される上記請求項1記載の遠心ファンの周囲に箱状の本体を有し、さらに吐出口に集塵フィルタを有したファンフィルタユニット。  The fan filter unit which has a box-shaped main body around the centrifugal fan of the said Claim 1 driven with an electric motor, and also has a dust collection filter in the discharge outlet.
JP2002209068A 2002-07-18 2002-07-18 Fan filter unit Expired - Fee Related JP3746253B2 (en)

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Application Number Priority Date Filing Date Title
JP2002209068A JP3746253B2 (en) 2002-07-18 2002-07-18 Fan filter unit

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Publication Number Publication Date
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JP3746253B2 true JP3746253B2 (en) 2006-02-15

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007100559A (en) * 2005-10-03 2007-04-19 Matsushita Electric Ind Co Ltd Fan filter unit
KR101335662B1 (en) * 2012-04-03 2013-12-03 주식회사트라이애드 Exhaust system with built-in rotation body
CN103174674A (en) * 2013-04-02 2013-06-26 宁波朗迪叶轮机械有限公司 Oblique flow centrifugal impeller for air conditioner
CN103967838B (en) * 2014-05-14 2019-03-19 珠海格力电器股份有限公司 Centrifugation blade
JP2019203451A (en) * 2018-05-24 2019-11-28 株式会社日立産機システム Fan filter unit, semiconductor manufacturing device using the same, aseptic work device and air shower device

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