JP2001263295A - Centrifugal air blower - Google Patents

Centrifugal air blower

Info

Publication number
JP2001263295A
JP2001263295A JP2000075386A JP2000075386A JP2001263295A JP 2001263295 A JP2001263295 A JP 2001263295A JP 2000075386 A JP2000075386 A JP 2000075386A JP 2000075386 A JP2000075386 A JP 2000075386A JP 2001263295 A JP2001263295 A JP 2001263295A
Authority
JP
Japan
Prior art keywords
hub
blower
shroud
air
impeller
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.)
Pending
Application number
JP2000075386A
Other languages
Japanese (ja)
Inventor
Tomohito Takada
智仁 高田
Michihiro Kurokawa
通弘 黒河
Katsuyoshi Oki
勝慶 隠岐
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP2000075386A priority Critical patent/JP2001263295A/en
Publication of JP2001263295A publication Critical patent/JP2001263295A/en
Pending legal-status Critical Current

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  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

PROBLEM TO BE SOLVED: To reduce broadband noise of a centrifugal air blower used for an air conditioner facility apparatus. SOLUTION: In the centrifugal air blower using an impeller 10 provided with a hub 11 for transmitting rotary driving force to a center part and whose flat surface is formed in a circular shape, a shroud 12 disposed in such a way that an air taking-in port 12a is opened to a center part, a flat surface is formed in a ring shape, and the shroud 12 is opposed to the hub at prescribed clearances, and a plurality of air supplying blades 13 disposed in a circumferential direction at prescribed clearances between outer peripheral parts of the hub and the shroud; a projection having a prescribed shape is disposed on a positive pressure surface side of each air supplying blade. It is thus possible to prevent large and independent vortex generated backward the air supplying blades and thereby, it is possible to suppress broadband noise.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、空調設備用に用い
られる遠心送風機に係り、特に、広帯域周波数騒音の低
減を図った遠心送風機に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centrifugal blower used for air conditioning equipment, and more particularly to a centrifugal blower for reducing broadband frequency noise.

【0002】[0002]

【従来の技術】空調設備等において熱交換器等に空気を
送風するのに様々な送風機が使用されており、このよう
な送風機の一つとして、図1及び図2に示すような羽根
車10を使用した遠心送風機が用いられている。
2. Description of the Related Art In an air conditioner or the like, various blowers are used to blow air to a heat exchanger or the like. One of such blowers is an impeller 10 as shown in FIGS. A centrifugal blower using is used.

【0003】ここで、この遠心送風機においては、図1
及び図2に示すように、中心部に回転駆動力が伝達され
る平面形状が円形状で中央部が膨出したハブ11と、中
央部に空気取り入れ口12aが開口された平面形状がリ
ング状で前記のハブ11と所要間隔を介して対向するよ
うに配置されたシュラウド12と、前記のハブ11とシ
ュラウド12との外周部間において周方向に所要間隔を
介して複数の送風羽根13が設けられた羽根車10を用
い、前記のハブ11を介してこの羽根車10を回転さ
せ、シュラウド12に設けられた空気取り入れ口12a
から羽根車10内に空気を取り入れ、この空気を回転す
る各送風羽根13によってハブ11とシュラウド12の
間から羽根車10の外周側に送り出すようになってい
る。
[0003] In this centrifugal blower, FIG.
As shown in FIG. 2, the hub 11 has a circular shape in a plane where the rotational driving force is transmitted to the center and a bulged center, and a ring-shaped plane in which an air intake 12a is opened in the center. A shroud 12 is disposed so as to face the hub 11 with a required space therebetween, and a plurality of blower blades 13 are provided between the outer peripheral portion of the hub 11 and the shroud 12 with a required space in the circumferential direction. The impeller 10 is rotated through the hub 11 by using the impeller 10 provided, and an air intake port 12 a provided in the shroud 12 is provided.
Then, air is taken into the impeller 10 and the air is sent to the outer peripheral side of the impeller 10 from between the hub 11 and the shroud 12 by each of the blowing blades 13 that rotates the air.

【0004】このような遠心送風機の羽根車において
は、特に空調設備の室内機に用いられることが多く、そ
の低騒音化が望まれている。また、遠心送風機の羽根車
において発生する騒音は、広帯域周波数騒音が支配的で
ある。
[0004] Such an impeller of a centrifugal blower is often used particularly for an indoor unit of an air conditioner, and its noise reduction is desired. Further, the noise generated in the impeller of the centrifugal blower is dominated by broadband frequency noise.

【0005】この広帯域周波数騒音は、送風羽根の表面
からの気流の剥離、送風羽根面上の圧力変動等によって
発生するものである。この問題点を解消することを目的
とした従来の技術として、送風羽根の表面加工、送風羽
根の断面形状の翼形化など、羽根車の最適設計がなされ
ている。
[0005] The broadband frequency noise is generated due to separation of an air current from the surface of the blower blade, pressure fluctuation on the blower blade surface, and the like. As a conventional technique for solving this problem, an optimal design of an impeller has been made, such as surface processing of a blower blade and formation of a blade-shaped cross-sectional shape of the blower blade.

【0006】また、特開平5−126093号公報に
は、遠心送風機の羽根車の回転時に風があたる送風羽根
の表面に、送風羽根の幅方向に延びる凸部を立体的に設
けることにより、送風羽根外縁の表面および裏面のそれ
ぞれに沿って放出される空気の合流を防ぐことにより騒
音を抑制する技術が開示されている。
Japanese Patent Application Laid-Open No. 5-126093 discloses an air blower having a three-dimensionally provided convex portion extending in the width direction of the blower blade on the surface of the blower blade to which the wind is applied when the impeller of the centrifugal blower rotates. There is disclosed a technique for suppressing noise by preventing the air discharged along each of the front surface and the rear surface of the blade outer edge from joining.

【0007】[0007]

【発明が解決しようとする課題】以上述べたように、空
調設備機器に用いられる遠心送風機の低騒音化が進めら
れているが、その低騒音化に対する要求はさらに高まっ
ている。特に広帯域周波数騒音においては依然問題とな
っており、一層の低騒音化を図ることが課題となってい
る。
As described above, the noise reduction of centrifugal blowers used in air conditioning equipment has been promoted, but the demand for the noise reduction has further increased. In particular, there is still a problem with broadband frequency noise, and it is an issue to further reduce noise.

【0008】上記従来の問題点に鑑み、本発明は、広帯
域周波数騒音の低減を図ることによって、遠心送風機の
低騒音化をさらに向上させることを目的とする。
[0008] In view of the above-mentioned conventional problems, an object of the present invention is to further improve the noise reduction of a centrifugal blower by reducing broadband frequency noise.

【0009】[0009]

【課題を解決する為の手段】上記目的を達成するため本
発明の遠心送風機は、中心部に回転駆動力が伝達される
平面形状が円形状のハブと、中央部に空気取り入れ口が
開口された平面形状がリング状で前記のハブと所要間隔
を介して対向するように配置されたシュラウドと、前記
のハブとシュラウドの外周部間において周方向に所要間
隔を介して配列された複数の送風羽根とを有する羽根車
を用いた遠心送風機において、送風羽根の正圧面側に回
転軸と略平行に突起を設けた遠心送風機であることを特
徴とする。
In order to achieve the above object, a centrifugal blower according to the present invention comprises a hub having a circular shape in a plane where a rotational driving force is transmitted to a center portion, and an air intake opening in a center portion. A shroud arranged in a ring shape and facing the hub with a required interval therebetween, and a plurality of blowers arranged at a required interval in the circumferential direction between the hub and the outer peripheral portion of the shroud. A centrifugal blower using an impeller having blades is characterized in that it is a centrifugal blower provided with a projection substantially parallel to the rotation axis on the pressure side of the blower blade.

【0010】上記の構成であれば、突起後方で微小な剥
離渦を多数発生させることにより、正圧面側の送風羽根
表面からの大きな剥離を抑制することができ、広帯域周
波数騒音を低下させることができる。
With the above configuration, a large number of minute separation vortices are generated behind the projection, so that large separation from the surface of the blowing blade on the pressure side can be suppressed, and broadband frequency noise can be reduced. it can.

【0011】また、前記遠心送風機の羽根車において、
送風羽根の正圧面側に設ける突起の形状を略V字型にし
てもよい。
In the impeller of the centrifugal blower,
The shape of the projection provided on the pressure side of the blower blade may be substantially V-shaped.

【0012】上記の構成であれば、突起後方で微小な剥
離渦を多数発生させることにより、正圧面側の送風羽根
表面からの大きな剥離を抑制することができ、さらに、
送風羽根表面の回転軸方向の乱れを抑制し、送風羽根面
上の圧力変動を低下させることができる。これらにより
広帯域周波数騒音を低下させることができる。
According to the above configuration, a large number of minute peeling vortices are generated behind the projection, so that large peeling from the surface of the blowing blade on the pressure side can be suppressed.
Disturbance of the surface of the blower blade in the rotation axis direction can be suppressed, and pressure fluctuation on the blower blade surface can be reduced. With these, broadband frequency noise can be reduced.

【0013】[0013]

【発明の実施の形態】以下、本発明による遠心送風機の
実施の形態について、図面を参照しながら説明する。本
発明が適用される遠心送風機の羽根車の基本構造につい
ては、図1および図2の従来例と特に変わるところはな
いので、その詳細な説明を省略する。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. The basic structure of the impeller of the centrifugal blower to which the present invention is applied is not particularly different from the conventional example shown in FIGS. 1 and 2, and therefore a detailed description thereof is omitted.

【0014】図3および図4は、第1の実施形態の、遠
心送風機の送風羽根30の斜視図およびその断面図であ
る。突起31が送風羽根30の正圧面側の表面30a
に、回転軸と略平行に配置されている。遠心送風機の羽
根車が回転している時、送風羽根30の表面を気流32
が流れている。気流32は突起31を回り込むように流
れ、この時突起後方に微小な剥離渦流れ33が発生す
る。この渦流れは多数発生するが、単独の大きな剥離渦
の発生を防ぐことができ、広帯域周波数騒音を低下させ
ることができる。
FIGS. 3 and 4 are a perspective view and a sectional view of a blower blade 30 of the centrifugal blower according to the first embodiment. The protrusion 31 is a surface 30 a on the pressure side of the blower blade 30.
Are arranged substantially parallel to the rotation axis. When the impeller of the centrifugal blower is rotating, the airflow 32
Is flowing. The air current 32 flows so as to go around the protrusion 31, and at this time, a minute separation vortex flow 33 is generated behind the protrusion. Although many vortex flows are generated, generation of a single large separation vortex can be prevented, and broadband frequency noise can be reduced.

【0015】図5は、第2の実施形態の、遠心送風機の
送風羽根40の斜視図である。略V字型の形状の突起4
1が、送風羽根40の正圧面側の表面に回転軸と略平行
になるよう複数個配置されている。遠心送風機の羽根車
が回転している時、送風羽根40の表面を気流が流れて
いる。気流は突起41を回り込むように流れ、この時突
起後方に微小な剥離渦流れが発生する。この渦流れは多
数発生するが、単独の大きな剥離渦の発生を防ぐことが
できる。さらに、突起41の形状が略V字型であること
により、送風羽根表面の回転軸方向の乱れを抑制し、送
風羽根面上の圧力変動を低下させることができる。これ
らにより、広帯域周波数騒音を低下させることができ
る。
FIG. 5 is a perspective view of a blower blade 40 of a centrifugal blower according to a second embodiment. A substantially V-shaped projection 4
1 are arranged on the surface on the pressure side of the blower blade 40 so as to be substantially parallel to the rotation axis. When the impeller of the centrifugal blower is rotating, airflow is flowing on the surface of the blower blade 40. The air flow flows around the protrusion 41, and at this time, a minute separation vortex flow occurs behind the protrusion. Although many vortex flows occur, generation of a single large separation vortex can be prevented. Further, since the shape of the projection 41 is substantially V-shaped, disturbance in the direction of the rotation axis on the surface of the blower blade can be suppressed, and pressure fluctuation on the blower blade surface can be reduced. As a result, broadband frequency noise can be reduced.

【0016】以上の各実施例において、突起の形状につ
いては、その断面が部分円形であることが好ましい。断
面形状が部分円形であれば、気流が突起を回り込む際
に、気流はその突起表面に沿って流れるために、気流を
阻害しにくいからである。
In each of the embodiments described above, the shape of the projection is preferably partially circular in cross section. This is because, if the cross-sectional shape is a partial circular shape, when the airflow goes around the projection, the airflow flows along the surface of the projection, so that the airflow is hardly obstructed.

【0017】また、突起の高さについては、0.5mm
以上1mm以下であることが好ましい。突起が高すぎる
と、気流を阻害する上に、その後方での渦流れが大きな
ものとなってしまうからである。
The height of the projection is 0.5 mm
It is preferably at least 1 mm. If the projections are too high, the airflow is obstructed, and the vortex flow behind the projections becomes large.

【0018】[0018]

【発明の効果】以上説明したように本発明によれば、送
風羽根の正圧面側に突起を配置することにより、送風羽
根後方の大きな単独の渦流れの発生を防ぐことができ、
その結果広帯域周波数が抑制され、大幅に低騒音化が図
られるため、空調設備機器の室内機用などに適した遠心
送風機を提供することができる。
As described above, according to the present invention, a large single vortex flow behind the blower blade can be prevented by disposing the protrusion on the pressure side of the blower blade.
As a result, the broadband frequency is suppressed and the noise is significantly reduced, so that a centrifugal blower suitable for an indoor unit of an air conditioner or the like can be provided.

【図面の簡単な説明】[Brief description of the drawings]

【図1】従来の遠心送風機に使用する羽根車の概略平面
図である。
FIG. 1 is a schematic plan view of an impeller used for a conventional centrifugal blower.

【図2】従来の遠心送風機に使用する羽根車の概略断面
図である。
FIG. 2 is a schematic sectional view of an impeller used for a conventional centrifugal blower.

【図3】本発明の第1の実施の形態における、遠心送風
機の羽根車の送風羽根の斜視図である。
FIG. 3 is a perspective view of a blower blade of an impeller of the centrifugal blower according to the first embodiment of the present invention.

【図4】本発明の第1の実施の形態における、遠心送風
機の羽根車の送風羽根の断面図である。
FIG. 4 is a sectional view of a blower blade of an impeller of a centrifugal blower according to the first embodiment of the present invention.

【図5】本発明の第2の実施の形態における、遠心送風
機の羽根車の送風羽根の斜視図である。
FIG. 5 is a perspective view of a blower blade of an impeller of a centrifugal blower according to a second embodiment of the present invention.

【符号の説明】[Explanation of symbols]

10 羽根車 11 ハブ 12 シュラウド 12a 空気取り入れ口 13 送風羽根 30 送風羽根 30a 送風羽根30の正圧面側の表面 31 突起 32 送風羽根表面の気流 33 突起後方の渦流れ 40 送風羽根 41 突起 DESCRIPTION OF SYMBOLS 10 Impeller 11 Hub 12 Shroud 12a Air intake 13 Blower blade 30 Blower blade 30a Surface on the pressure side of blower blade 31 Projection 32 Airflow on blower blade surface 33 Vortex flow behind protrusion 40 Blower blade 41 Projection

───────────────────────────────────────────────────── フロントページの続き (72)発明者 隠岐 勝慶 大阪府守口市京阪本通2丁目5番5号 三 洋電機株式会社内 Fターム(参考) 3H033 AA02 AA18 BB02 BB06 CC02 DD05 EE06  ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Katsuyoshi Oki 2-5-5 Keihanhondori, Moriguchi-shi, Osaka F-term in Sanyo Electric Co., Ltd. 3H033 AA02 AA18 BB02 BB06 CC02 DD05 EE06

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 中心部に回転駆動力が伝達される平面形
状が円形状のハブと、中央部に空気取り入れ口が開口さ
れた平面形状がリング状で前記のハブと所要間隔を介し
て対向するように配置されたシュラウドと、前記のハブ
とシュラウドの外周部間において周方向に所要間隔を介
して配列された複数の送風羽根とを有する羽根車を用い
た遠心送風機において、送風羽根の正圧面側に回転軸と
略平行に突起を配置した遠心送風機。
1. A hub having a circular shape in a plane where a rotational driving force is transmitted to a center portion, and a ring shape in a plane shape having an air intake opening in a center portion facing the hub at a required interval. Centrifugal blower using an impeller having a shroud arranged so as to be disposed and a plurality of blower blades arranged at required intervals in the circumferential direction between the hub and the outer peripheral portion of the shroud, A centrifugal blower with protrusions arranged on the pressure side substantially parallel to the rotation axis
【請求項2】 送風羽根の正圧面側に設けた突起の形状
を略V字型にした、請求項1に記載の遠心送風機。
2. The centrifugal blower according to claim 1, wherein the shape of the projection provided on the pressure side of the blower blade is substantially V-shaped.
JP2000075386A 2000-03-17 2000-03-17 Centrifugal air blower Pending JP2001263295A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000075386A JP2001263295A (en) 2000-03-17 2000-03-17 Centrifugal air blower

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000075386A JP2001263295A (en) 2000-03-17 2000-03-17 Centrifugal air blower

Publications (1)

Publication Number Publication Date
JP2001263295A true JP2001263295A (en) 2001-09-26

Family

ID=18593294

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000075386A Pending JP2001263295A (en) 2000-03-17 2000-03-17 Centrifugal air blower

Country Status (1)

Country Link
JP (1) JP2001263295A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002168194A (en) * 2000-12-04 2002-06-14 Mitsubishi Heavy Ind Ltd Multiblade blower
KR100658868B1 (en) 2005-07-08 2006-12-15 르쑨 익스팬스 코포레이션 Airflow generating structure and the apparatus thereof
JP2008069709A (en) * 2006-09-14 2008-03-27 Topre Corp Impeller for centrifugal fan
JP2014074352A (en) * 2012-10-03 2014-04-24 Minebea Co Ltd Centrifugal fan
EP2410186A4 (en) * 2009-07-13 2015-05-06 Mitsubishi Heavy Ind Ltd Impeller and rotary machine
CN106286387A (en) * 2016-09-30 2017-01-04 中国科学院光电研究院 A kind of excimer laser cross flow blower impeller of effective reduction noise

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002168194A (en) * 2000-12-04 2002-06-14 Mitsubishi Heavy Ind Ltd Multiblade blower
JP4698818B2 (en) * 2000-12-04 2011-06-08 三菱重工業株式会社 Multi-blade blower
KR100658868B1 (en) 2005-07-08 2006-12-15 르쑨 익스팬스 코포레이션 Airflow generating structure and the apparatus thereof
JP2008069709A (en) * 2006-09-14 2008-03-27 Topre Corp Impeller for centrifugal fan
EP2410186A4 (en) * 2009-07-13 2015-05-06 Mitsubishi Heavy Ind Ltd Impeller and rotary machine
US9404506B2 (en) 2009-07-13 2016-08-02 Mitsubishi Heavy Industries, Ltd. Impeller and rotary machine
JP2014074352A (en) * 2012-10-03 2014-04-24 Minebea Co Ltd Centrifugal fan
US9709073B2 (en) 2012-10-03 2017-07-18 Minebea Co., Ltd. Centrifugal fan
CN106286387A (en) * 2016-09-30 2017-01-04 中国科学院光电研究院 A kind of excimer laser cross flow blower impeller of effective reduction noise

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