JP4362164B2 - Axial fan - Google Patents
Axial fan Download PDFInfo
- Publication number
- JP4362164B2 JP4362164B2 JP14353699A JP14353699A JP4362164B2 JP 4362164 B2 JP4362164 B2 JP 4362164B2 JP 14353699 A JP14353699 A JP 14353699A JP 14353699 A JP14353699 A JP 14353699A JP 4362164 B2 JP4362164 B2 JP 4362164B2
- Authority
- JP
- Japan
- Prior art keywords
- port side
- suction port
- wind tunnel
- axial fan
- cross
- 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
Links
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000001914 calming effect Effects 0.000 description 4
- 238000007664 blowing Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000011835 investigation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Description
【０００１】
【産業上の利用分野】
本発明は、軸流ファン、特に静穏化を求められる軸流ファンに関する。
【０００２】
【従来の技術】
電子部品の小型化、電子機器小型化の流れの中で、発熱部材冷却の重要度が高まり、軸流ファンの小型化とこの小型化に背反的な冷却能力の維持・向上や、設置場所の静穏化に伴い冷却手段である軸流ファンそのものへの静穏化の要求は益々高まってきている。
【０００３】
上述のようなニーズの高まりに伴って種々の改善が成されてきており、その一環として、図示も詳細も示さないが、本願出願人も特願平１−１４４０６２による風洞端部形状の円弧状形成等の提案をしている。
【０００４】
【発明が解決しようとする課題】
上述の如き従来の構成は、送風機能の維持と静穏化の面でのレベルアップは実現しているが、ニーズの高まりとの並走の形で更なる改善が必要となっているのが実態であった。
【０００５】
【課題を解決するための手段】
本発明に成る軸流ファンは、前記羽根車を形成するブレードの、吸込口側端部の外周縁径をＤ、前記断面円弧状を成す円筒状風洞部の吸込口側端部断面円弧半径をＲ、前記ブレードの吸込口側端部外周縁と、これと放射方向に対向する前記風洞部円弧面部位との隙間をΔとしたとき、ＲとΔが夫々
Ｒ／Ｄ が ０．１７３〜０．２４２
Δ／Ｄ が ０．０２４〜０．０３８
の範囲となるように形成され、
【０００６】
また前記風洞部内周面は、少なくとも吸込口側の一部が吐出口側に向って縮小する勾配を持つ円錐状を成し、前記吸込口側端部の断面円弧部が該円錐状内周面に連通すると共に吸込口側取付け面にも連通するように形成されている。
【０００７】
【実施例】
以下図面によって本発明の実施例を説明する。
【０００８】
全体断面を示す図２を参照して、図１は、本発明に係る吸込口側端部の部分拡大図として示すものである。ベンチュリケース１の風洞部内面に駆動用モータ３で回転する羽根車２が設けられている。風量確保、静穏化を目的としたブレード２−１の表面形状やその端面形状、風洞端部の円弧状形成等については、既に多くの提案も見られるもので、本願発明の背景技術となるものであるから詳細は省略する。なお本発明に係る部位符号として、ベンチュリケース端部円弧形成部１−１１、同じくベンチュリケース吸込口側取付け面１−１２、ブレードの吸込口側外径端部２−１１を併記してある。
【０００９】
中断することの無い静穏化レベルのニーズ向上に対応するため、形状特定に関し種々検討を重ねた結果、本願発明者は、送風機能を損なうこと無しに静穏化のレベルアップを実現する条件を発見した。
【００１０】
図３は、円筒状風洞部の吸込口側端部１−１１を円弧状とし、その円弧半径 Ｒと、動作騒音レベル ｄＢの相関を示している。
【００１１】
また図４は、前記ブレードの吸込口側端部外周縁２−１１と、これと放射方向で対向する前記風洞部円弧面部位１−１３との隙間 Δと、動作騒音レベル ｄＢの相関を示している。
【００１２】
上述の検討結果に基き騒音レベルを小さくする構造上の形態として、静穏化に適した寸法相関の範囲を、ブレードの吸込口側端部外径を Ｄ としたとき、
Ｒ／Ｄ が ０．１７３〜０．２４２
Δ／Ｄ が ０．０２４〜０．０３８
として選択する事が有効であることを確認したものである。
【００１３】
なお、円筒状風洞部の内周面と端部円弧状形成部１−１１の連通、該端部円弧状形成部１−１１とベンチュリケースの吸込口側取付け面１−１２との連通については、夫々の連通形成は従前公知のもので、連通そのものだけに新規性を求めるものではないので図示と詳細の説明を省略する。
【００１４】
【発明の効果】
本発明に成る軸流ファンは、送風機能を損なうこと無しに静穏化を実現する効果をもたらす。
【図面の簡単な説明】
【図１】本発明に成る例の要部拡大説明図である。
【図２】図１の例の全体構成を示す断面図である。
【図３】断面円弧状を成す円筒状風洞部端部の円弧径と騒音レベルとの相関を示すグラフである。
【図４】ブレードの吸込口側端部外周縁と、これと放射方向に対向する前記風洞部円弧面部位との隙間 Δ と騒音レベルとの相関を示すグラフである。
【符号の説明】
１ ベンチュリケース
１−１１ 端部円弧形成部
１−１２ 吸込口側取付面
１−１３ 吸込口側端部外周縁と放射方向で対向する風洞部円弧面部位
２ 羽根車
２−１ ブレード
２−１１ 吸込口側外径端部
３ モータ[0001]
[Industrial application fields]
The present invention relates to an axial fan, particularly an axial fan that is required to be quiet.
[0002]
[Prior art]
In the trend of electronic component miniaturization and electronic equipment miniaturization, the importance of cooling heat-generating members has increased, and the axial fan has been downsized and its cooling capacity has been maintained and improved against this miniaturization. Along with the calming, the demand for calming the axial fan itself, which is a cooling means, is increasing.
[0003]
Various improvements have been made with the increasing needs as described above, and as a part thereof, neither the illustration nor the details are shown, but the applicant of the present application also has the arc shape of the wind tunnel end shape according to Japanese Patent Application No. 1-144062. Proposals for formation etc.
[0004]
[Problems to be solved by the invention]
Although the conventional configuration as described above has improved the level of maintenance and quietness of the air blowing function, it is actually necessary to improve further in the form of parallel running with increasing needs. Met.
[0005]
[Means for Solving the Problems]
The axial fan according to the present invention is configured such that the outer peripheral diameter of the suction port side end of the blade forming the impeller is D, and the suction port side end cross sectional arc radius of the cylindrical wind tunnel portion forming the circular arc shape of the cross section. R, where R and Δ are R / D of 0.173 to 0, where Δ is the clearance between the outer peripheral edge of the suction port side end of the blade and the arcuate surface portion of the wind tunnel portion facing the radial direction. .242
Δ / D is 0.024 to 0.038
Formed to be in the range of
[0006]
Further, the inner peripheral surface of the wind tunnel portion has a conical shape having a gradient in which at least a part on the suction port side is reduced toward the discharge port side, and a cross-sectional arc portion of the end portion on the suction port side is the conical inner peripheral surface. And also communicates with the suction side mounting surface.
[0007]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0008]
Referring to FIG. 2 showing the entire cross section, FIG. 1 is a partially enlarged view of the suction port side end portion according to the present invention. An
[0009]
As a result of various investigations regarding shape specification in order to respond to the need for an uninterrupted calming level, the inventor of the present application has found a condition for realizing a level of calming without impairing the air blowing function. .
[0010]
FIG. 3 shows the correlation between the arc radius R and the operating noise level dB in the suction port side end portion 1-11 of the cylindrical wind tunnel portion having an arc shape.
[0011]
FIG. 4 shows a correlation between the clearance Δ between the suction port side end outer peripheral edge 2-11 of the blade and the wind tunnel arcuate surface portion 1-13 facing the radial direction and the operating noise level dB. ing.
[0012]
As a structural form to reduce the noise level based on the above-mentioned examination results, when the range of the dimensional correlation suitable for quieting is D, the outer diameter of the suction inlet side of the blade,
R / D is 0.173 to 0.242
Δ / D is 0.024 to 0.038
It is confirmed that it is effective to select as
[0013]
Regarding the communication between the inner peripheral surface of the cylindrical wind tunnel portion and the end arc-shaped forming portion 1-11, and the communication between the end arc-shaped forming portion 1-11 and the suction port side mounting surface 1-12 of the venturi case. Each communication formation is conventionally known and does not require novelty only in the communication itself, so illustration and detailed description are omitted.
[0014]
【The invention's effect】
The axial fan according to the present invention provides an effect of realizing quietness without impairing the air blowing function.
[Brief description of the drawings]
FIG. 1 is a main part enlarged explanatory view of an example according to the present invention.
FIG. 2 is a cross-sectional view showing the overall configuration of the example of FIG.
FIG. 3 is a graph showing a correlation between an arc diameter of a cylindrical wind tunnel end portion having an arc shape in cross section and a noise level.
FIG. 4 is a graph showing a correlation between a clearance Δ between the outer peripheral edge of the suction inlet side end portion of the blade and the arc surface portion of the wind tunnel portion facing the radial direction and the noise level.
[Explanation of symbols]
DESCRIPTION OF
Claims (3)
断面円弧状を成す、前記円筒状風洞部の吸込口側端部断面円弧半径をＲ、
前記ブレードの吸込口側端部外周縁と、これと放射方向に対向する前記風洞部円弧面部位との隙間をΔとしたとき、ＲとΔが夫々
Ｒ／Ｄ が ０．１７３〜０．２４２
Δ／Ｄ が ０．０２４〜０．０３８
の範囲にあること、を特徴とする軸流ファン。A venturi case having a cylindrical wind tunnel portion, a small diameter cylindrical portion connected by a plurality of legs provided at one end of the wind tunnel portion to form a bearing box, and an electric motor support portion integrated with the small diameter cylindrical portion; In an axial fan including an impeller opposed to a peripheral surface through a small gap and rotatably supported, and an electric motor for driving the impeller, a suction port side end of a blade forming the impeller The outer peripheral diameter is D,
The cross-sectional arc radius of the cylindrical wind tunnel portion that forms a circular arc cross-section is R,
When the clearance between the outer peripheral edge of the blade inlet side end of the blade and the arcuate surface portion of the wind tunnel portion facing the radial direction is Δ, R and Δ are R / D 0.173 to 0.242, respectively.
Δ / D is 0.024 to 0.038
An axial fan characterized by being in the range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14353699A JP4362164B2 (en) | 1999-05-24 | 1999-05-24 | Axial fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14353699A JP4362164B2 (en) | 1999-05-24 | 1999-05-24 | Axial fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000337297A JP2000337297A (en) | 2000-12-05 |
| JP4362164B2 true JP4362164B2 (en) | 2009-11-11 |
Family
ID=15341039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14353699A Expired - Fee Related JP4362164B2 (en) | 1999-05-24 | 1999-05-24 | Axial fan |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4362164B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002089496A (en) * | 2000-09-14 | 2002-03-27 | Japan Servo Co Ltd | Axial flow fan |
| JP6658037B2 (en) * | 2016-02-08 | 2020-03-04 | 日本電産株式会社 | Fan motor |
-
1999
- 1999-05-24 JP JP14353699A patent/JP4362164B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000337297A (en) | 2000-12-05 |
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