JP4368115B2 - Centrifugal fan - Google Patents
Centrifugal fan Download PDFInfo
- Publication number
- JP4368115B2 JP4368115B2 JP2003030172A JP2003030172A JP4368115B2 JP 4368115 B2 JP4368115 B2 JP 4368115B2 JP 2003030172 A JP2003030172 A JP 2003030172A JP 2003030172 A JP2003030172 A JP 2003030172A JP 4368115 B2 JP4368115 B2 JP 4368115B2
- Authority
- JP
- Japan
- Prior art keywords
- impeller
- centrifugal fan
- casing
- drive motor
- blade
- 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
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- Structures Of Non-Positive Displacement Pumps (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Description
【0001】
【発明の属する技術分野】
本発明は、遠心ファン、特に薄型の遠心ファンの静穏化改良に関する。
【0002】
【従来の技術】
【特許文献1】
発明の名称; 遠心ファン
特開平10−037894号公報
【特許文献2】
発明の名称; 遠心ファンの羽根車
特開平11−013690号公報
【0003】
遠心ファンの静穏化に係る改良は、小型化・薄型化を伴う用途の拡大で多様を極め、上術先願公知文献だけでなく、多くの策が提案されているが、その過半は回転動作に伴う騒音発生源である多翼羽根車に係る改良で、流体力学に基づくブレード形状の設定や、ブレード配置を対象とするものが多いのが実態であった。
【0004】
そして、多翼羽根車の構成としては、円筒状に並ぶ多数の翼を回転体として保持するために、軸に連係するインペラボスが設けられるが、周知構成として見られるインペラボスは、例えば図5に見るように、その内部に駆動電動機を収納するためにカップ状に形成され、平坦なその頭部が遠心ファンの吸気口に対向することから、図に矢示するように、流入空気の流れは、中心部の一部が該インペラボス頭部に鋭角状に衝突する。
【0005】
遠心ファンの動作音としては、上述の通り羽根車のインペラに起因するものと共に、該吸気の乱れでのインペラボスに関わるノイズも加わり、該インペラボス周りからのノイズ伝播も改善課題であることに変わりが無く、インペラボスの剛性のアップも検討課題である他、上述し図示のようなインペラボス形状によるノイズ放散が、図6に示すようにその向きを一にすることも、改善すべき点であることが浮上してきた。
【0006】
【発明が解決しようとする課題】
上述の如き従来の構成は、それ相応の効果を実現して来てはいるが、実用上の改善へのニーズは止まること無く、小さな改善でも、その積み上げによる更なる静穏化の実現が望まれていることに変わりが無いのが実態であった。
【0007】
【課題を解決するための手段】
本発明に成る遠心ファンは、ケーシングと、該ケーシングの内部に回転自在に軸支される多翼羽根車と、該多翼羽根車の内側でケーシングの吸込口中央部に対向するインペラボスと、該インペラボスに内装される駆動電動機もしくはインペラボスを回転子ハブとする外転型電動機とを有し、前記ケーシングの吸込口から外気を吸入し、前記多翼羽根車の回転に拠り吸入空気に遠心力を与え、ケーシング外周面の一部に形成された吐出口から高圧空気を吐出するもので、前記インペラボスはその頭部が球状面を備え、中央部に径がインペラボス径の1/4を超える大きさの球状面とこれに連通する平坦面とより成るように形成されている。
【0008】
【実施例】
以下図面によって本発明の実施例を説明する。
【0009】
図1は、本願発明に成る遠心ファンを説明するための参考例を示す断面図で、駆動電動機は、インペラボスを回転子ハブとする外転型駆動電動機を使用している。該外転型駆動電動機を使用した遠心ファンの全体構造については、周知技術であるので説明を省略する。
【0010】
該例は、インペラボスが吸気口に対向する頭部全体が球状面を有するもので、従来技術を示す上述図5と対比して明らかなように、インペラボスの頭部形状に特徴を有するものである。
【0011】
図1に示す例では、インペラボス頭部が球状面として形成されていることから、吸気の流れが、図に矢示するように円滑になることは言うまでも無い。
【0012】
そして該構成では、図2に示すようにインペラボスが吸気の流れに曝されて生じる振動や、内装される電動機の回転動作に拠るノイズの放散が八方に分散されることになって、騒音抑制に繋がっている。
【0013】
図3は本願発明による遠心ファンの実施例を示す要部断面図で、インペラボス頭部形状を、中心部の球状面とこれに連通する周縁の平坦面として形成されているものである。
【0014】
本実施例では、上述従来技術を示す図5と対比して明らかなように、吸気の流れの円滑性は確保され、図4に示すように、インペラボスからのノイズ放散が分散される効果は、図1の参考例の場合と同様に得られるものである。
【0015】
本実施例では、インペラボス頭部が、中央の球状面とその周縁に連通する平坦面とを有し、該球状面の径がインペラボス径の1/4より大きいものが効果的であることが確認されている。
【0017】
また上述実施例では、駆動電動機を回転子ハブがインペラボスを兼ね、該インペラボスの内部に回転子本体が固定保持されている外転型電動機であるものとしているが、該例も含め周知技術の範疇として、インペラボスとは別体を成す駆動電動機が、当該インペラボスに内装される構成にも適用されることは言うまでも無い。
【0018】
【発明の効果】
本発明に成る遠心ファンは、上述の如き構成により、吸気から排気に至る空気の流れの円滑化や、これに関連するインペラボスのノイズ放散の分散化による騒音抑制を実現している。
【図面の簡単な説明】
【図1】 遠心ファンの参考例を示す一部断面図である。
【図2】 図1の例のノイズ放散の分散を説明する図である。
【図3】 本発明に成る遠心ファンの実施例を示す要部断面図である。
【図4】 図3の例のノイズ放散の分散を説明する図である。
【図5】 従来技術に成る遠心ファンの例を示す一部断面図である。
【図6】 図5の例のノイズ放散を説明する図である。
【符号の説明】
1 ケーシング
1−1 吸気口
2 多翼羽根車
2−1 インペラボス
2−11 頭部
2−111 球状面
2−112 平坦面
2−113 周縁部
3 駆動電動機[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in quietness of a centrifugal fan, particularly a thin centrifugal fan.
[0002]
[Prior art]
[Patent Document 1]
Title of invention; Centrifugal fan Japanese Patent Laid-Open No. 10-037894 [Patent Document 2]
Title of the invention: Centrifugal fan impeller JP 11-013690 A
Improvements related to the quietness of centrifugal fans have been diversified with the expansion of applications involving downsizing and thinning, and many measures have been proposed in addition to the well-known prior art documents. In many cases, improvements related to the multi-blade impeller, which is a noise generation source, are targeted for setting the blade shape based on fluid dynamics and for the blade arrangement.
[0004]
As a configuration of the multi-blade impeller, impellers linked to the shaft are provided to hold a large number of cylindrically arranged blades as a rotating body. The impellers seen as a well-known configuration are shown in FIG. As shown in the figure, the flow of the inflowing air is formed in a cup shape to house the drive motor in its interior, and its flat head faces the inlet of the centrifugal fan. A part of the center collides with the impeller boss head at an acute angle.
[0005]
As described above, the operation sound of the centrifugal fan is caused by the impeller of the impeller, and noise related to the impellers due to the disturbance of the intake air is added, and the noise propagation from around the impellers is also an improvement issue. In addition to improving the rigidity of the impellerbos, it is also a point to be improved as the noise dissipation due to the impellerbos shape as described above and illustrated in FIG. Has surfaced.
[0006]
[Problems to be solved by the invention]
Although the conventional configuration as described above has achieved the corresponding effect, the need for practical improvement does not stop, and even with small improvements, it is desirable to realize further calming by accumulation. The fact is that there is no change in being.
[0007]
[Means for Solving the Problems]
A centrifugal fan according to the present invention includes a casing, a multi-blade impeller rotatably supported inside the casing, an impeller boss facing the suction inlet central portion of the casing inside the multi-blade impeller, a drive motor or an Inperabosu is furnished to Inperabosu and an epicycloidal motor to a rotor hub, to draw in cool air from the suction port of the casing, a centrifugal force to the intake air more rotation of the multiblade impeller given, but for discharging high pressure air from the discharge port formed in a part of the casing outer peripheral surface, the Inperabosu comprises its head a spherical surface, the size diameter Chuo unit exceeds 1/4 of Inperabosu diameter It is formed to be more flat surface that communicated with the the spherical surface.
[0008]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0009]
FIG. 1 is a cross-sectional view showing a reference example for explaining a centrifugal fan according to the present invention. As the drive motor, an abduction type drive motor having Impellers as a rotor hub is used. Since the entire structure of the centrifugal fan using the abduction drive motor is a well-known technique, the description thereof is omitted.
[0010]
In this example, the entire head of the impeller boss facing the air inlet has a spherical surface, and as is apparent in comparison with FIG. 5 showing the prior art, the impeller boss has a characteristic head shape. .
[0011]
In the example shown in FIG. 1, since the impeller boss head is formed as a spherical surface, it goes without saying that the flow of the intake air becomes smooth as shown by the arrows in the figure.
[0012]
In this configuration, as shown in FIG. 2, the vibration caused by the impellers being exposed to the flow of intake air and the noise radiated due to the rotating operation of the internal motor are dispersed in all directions, thereby suppressing noise. It is connected.
[0013]
FIG. 3 is a cross-sectional view of an essential part showing an embodiment of the centrifugal fan according to the present invention . The impeller boss head shape is formed as a spherical surface at the center and a flat surface at the periphery communicating therewith.
[0014]
In the present embodiment, as apparent from the comparison with FIG. 5 showing the above-described prior art, the smoothness of the intake air flow is ensured, and as shown in FIG. This is the same as in the case of the reference example of FIG.
[0015]
In this example, it is confirmed that the impeller boss head has a central spherical surface and a flat surface communicating with the periphery thereof, and that the diameter of the spherical surface is larger than ¼ of the impeller boss diameter is effective. Has been.
[0017]
In the above-described embodiment, the drive motor is an abduction type motor in which the rotor hub also serves as the impeller boss, and the rotor main body is fixedly held inside the impeller boss. As a matter of course, the drive motor that is separate from the Impellers is also applied to a configuration in which the Impellers are installed.
[0018]
【The invention's effect】
The centrifugal fan according to the present invention achieves the noise suppression by the smoothing of the air flow from the intake air to the exhaust air and the dispersion of the impellers' noise dispersion related to the above-described configuration.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional view showing a reference example of a centrifugal fan .
FIG. 2 is a diagram for explaining dispersion of noise dissipation in the example of FIG. 1;
FIG. 3 is a cross-sectional view of an essential part showing an embodiment of a centrifugal fan according to the present invention.
4 is a diagram for explaining dispersion of noise dissipation in the example of FIG. 3; FIG.
FIG. 5 is a partial cross-sectional view showing an example of a centrifugal fan according to the prior art.
6 is a diagram for explaining noise dissipation in the example of FIG. 5; FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Casing 1-1
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP2003030172A JP4368115B2 (en) | 2003-02-07 | 2003-02-07 | Centrifugal fan |
Applications Claiming Priority (1)
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JP2003030172A JP4368115B2 (en) | 2003-02-07 | 2003-02-07 | Centrifugal fan |
Publications (2)
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JP2004239188A JP2004239188A (en) | 2004-08-26 |
JP4368115B2 true JP4368115B2 (en) | 2009-11-18 |
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JP2003030172A Expired - Fee Related JP4368115B2 (en) | 2003-02-07 | 2003-02-07 | Centrifugal fan |
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Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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KR100917197B1 (en) * | 2007-09-06 | 2009-09-15 | 엘지전자 주식회사 | Fan Motor |
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2003
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JP2004239188A (en) | 2004-08-26 |
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