JP2008248739A - Side cut fan - Google Patents

Side cut fan Download PDF

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JP2008248739A
JP2008248739A JP2007088806A JP2007088806A JP2008248739A JP 2008248739 A JP2008248739 A JP 2008248739A JP 2007088806 A JP2007088806 A JP 2007088806A JP 2007088806 A JP2007088806 A JP 2007088806A JP 2008248739 A JP2008248739 A JP 2008248739A
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arc passage
arc diameter
initial
cut
venturi
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JP2007088806A
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JP4611333B2 (en
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Motoi Jin
基 神
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Nidec Advanced Motor Corp
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Nidec Servo Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To suppress influence of pressure fluctuation caused by forming an arc passage of an inner circumference surface corresponding to a side cut part in a side cut fan in a curvature different from initial arc passage forming an air duct. <P>SOLUTION: This side cut fan has the initial arc passage and an arc passage communication part communicating with an arc passage different from the initial arc passage formed on an inner surface of a section corresponding to a predetermined cut off part of a venturi outer circumference surface, and is provided with the initial arc passage and a respective additional arc passage communication part communicating with the arc passage different from the initial arc passage at a section displaced in a circumference direction. Preferably, the additional arc passage communication parts are provided at separate two sections displacing by 90 degrees in respect to initial two cut off part forming section. Any respect arc passage communicating to the initial arc passage on the venturi inner circumference surface is formed as same arc passage. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、軸流ファン、特にサイドカットファンでの、ベンチュリの風洞部形状に関する。   The present invention relates to a venturi wind tunnel shape of an axial fan, particularly a side cut fan.

特開２００４−３５３５８５号公報）JP 2004-353585 A)

上述特許文献にも見られる通り送風性能の向上と静穏化という相反する要素に対応するため、ベンチュリの風洞部形状については種々の検討が試みられ実用化されており、本願発明に係る、実装スペース抑制を意図した所謂サイドカットファンも、その適用範囲であることに変わりはない。 As seen in the above-mentioned patent document, in order to cope with the conflicting elements of improvement in air blowing performance and quietness, various studies have been tried on the venturi shape of the venturi, and it has been put into practical use. The so-called side cut fan intended to be suppressed is still in the applicable range.

そして、サイドカットファン自体でも、切除部形成に伴うベンチュリの薄肉化対応として剛性を保持する目的もあって、風洞を形成するベンチュリ内周面には、当該切除部で、初期の風洞外側円弧面の円弧径とは異なる曲率径として、プロペラの転回外周円弧面との空隙の変化を少なくして連通するように形成されていることも周知の通りである。 The side cut fan itself also has the purpose of maintaining rigidity as a countermeasure for thinning the venturi accompanying the formation of the cut portion, and the venturi inner peripheral surface forming the wind tunnel has an initial wind tunnel outer arc surface at the cut portion. As is well known, it is formed so as to have a curvature diameter different from the arc diameter of the propeller so as to communicate with the rotating outer peripheral arc surface of the propeller with less change in the gap.

しかし、サイドカットファンでは、上述のように、従来技術に成る改善効果に加えて、サイドカット部に対応するベンチュリの内周面の円弧径が、当初の風洞外側円弧面を形成する初期円弧径とは異なる円弧径として形成されることによる、圧力変動の影響対策が求められて来ている。 However, in the side cut fan, as described above, in addition to the improvement effect of the prior art, the arc diameter of the inner peripheral surface of the venturi corresponding to the side cut portion is the initial arc diameter that forms the original wind tunnel outer arc surface. There is a demand for countermeasures against the influence of pressure fluctuations by forming the arc diameter different from that of the arc.

本発明に成るサイドカットファンは、ベンチュリ外周面の所定の切除部に対応する部位の内面に、初期円弧径とこれと異なる円弧径で連通する円弧径連通部が形成されると共に、周方向で変移した部位にも初期円弧径とこれと異なる円弧径で連通する別の追加円弧径連通部を備え、好ましくは、 In the side cut fan according to the present invention, an arc diameter communicating portion communicating with an initial arc diameter and a different arc diameter is formed on an inner surface of a portion corresponding to a predetermined cut portion on the outer peripheral surface of the venturi, and in the circumferential direction. The displaced part also includes another additional arc diameter communicating portion that communicates with the initial arc diameter and a different arc diameter,

前記追加円弧径連通部が、当初の２箇所の切除部形成部位に対し９０度変移する部位の、別の２箇所に設けられ、また、 The additional arc diameter communicating portion is provided at another two locations of the portion shifted 90 degrees with respect to the initial two excised portion forming portions,

前記ベンチュリ内周面で初期円弧径に連通する異なる円弧径が、いずれも同一円弧径として形成されている。 Different arc diameters communicating with the initial arc diameter on the inner peripheral surface of the venturi are all formed as the same arc diameter.

本発明に成るサイドカットファンは、当該サイドカットファンでの特異な課題である、ベンチュリ外周面の切除による、風洞外側内周面の円弧径変化に伴うプロペラの転回外周円弧面との空隙変化での、プロペラと風洞外側内周面との圧力干渉の影響を抑制する効果を実現している。 The side-cut fan according to the present invention is a unique problem in the side-cut fan. The effect of suppressing the influence of pressure interference between the propeller and the outer peripheral surface of the wind tunnel is realized.

以下図面により本発明の実施例を説明する。 Embodiments of the present invention will be described below with reference to the drawings.

図１は、本発明の第１の実施例を示す正面図であり、図２は、従来技術の実施例を示す正面図である。図２に示す２面を切除した従来周知のサイドカットファン１に対し、図１では、サイドカット部２−１の風洞外側円弧面に形成された円弧径連通部３−１と共に、９０度変移した部位の風洞外側円弧面に追加円弧径連通部３−４を設け、初期の真円状風洞外側円弧面３−２に対し大きな曲率径とした円弧径連通部を追加形成することで、プロペラ転回での空隙の変化を極力抑制するようにして、静穏化効果を高めている。 FIG. 1 is a front view showing a first embodiment of the present invention, and FIG. 2 is a front view showing an embodiment of the prior art. In contrast to the conventionally known side-cut fan 1 with the two surfaces shown in FIG. 2 cut away, in FIG. 1, a 90-degree change is made together with the arc-diameter communicating portion 3-1 formed on the arc-shaped outer arc surface of the side-cut portion 2-1. An additional arc diameter communicating portion 3-4 is provided on the outer arc surface of the wind tunnel at the portion, and an arc diameter communicating portion having a large curvature diameter with respect to the initial perfect circular wind tunnel outer arc surface 3-2 is additionally formed. The effect of calming is enhanced by minimizing the change of voids during turning.

上述図１は、ベンチュリー２の外周面での形状は、図２のものと類似しているが、上述の通り、サイドカット部２−１と９０度変移した部位のベンチュリ２の内周面に、追加円弧径連通部３−４を追加形成する例として示している。 1 is similar to that of FIG. 2 on the outer peripheral surface of the venturi 2, but as described above, on the inner peripheral surface of the venturi 2 at a position shifted 90 degrees from the side cut portion 2-1. The additional arc diameter communicating portion 3-4 is additionally shown as an example.

なお、通常、サイドカットファン１としての２面のサイドカット部２−１は、１８０度の変移で対向する部位に設けられる例が多く、対応する、追加される異なる曲率径の円弧径連通部を前記２面のサイドカット部２−１と９０度変異させることが一般的と言える。 In general, the two side cut portions 2-1 as the side cut fan 1 are often provided at opposing portions with a shift of 180 degrees, and a corresponding arc diameter communication portion having a different curvature diameter is added. It can be said that it is common to make a 90-degree mutation with the two side-cut portions 2-1.

図３と図４は、上述図１、図２に例示するサイドカット部２−１が１８０度偏移したサイドカットファン１の構成に係る、図２に示す従来構造と図１に示す２個の追加円弧径連通部３−４を付加した構成での、風量性能と騒音のオーバーオール値での比較データ、及び、両者の騒音を周波数分析として示す比較データである。 FIGS. 3 and 4 show the conventional structure shown in FIG. 2 and the two shown in FIG. 1 according to the configuration of the side cut fan 1 in which the side cut part 2-1 illustrated in FIGS. FIG. 6 is a comparison data showing the air flow performance and the overall noise value in the configuration to which the additional arc diameter communication part 3-4 is added, and the comparison data showing both noises as frequency analysis.

上述図１に示す本願発明構成の実施例では、図３に見る騒音のオーバーオール値で高風量領域での騒音レベルの顕著な低減効果を確認でき、図４の周波数分析のデータからは、ほぼ４００Ｈzのサイクルで発生する騒音ピーク値のうち、特に最大値を示す８００Ｈzでの低減効果が確認され、上記オーバーオール値での低減に寄与している。 In the embodiment of the present invention configuration shown in FIG. 1 described above, a significant reduction effect of the noise level in the high air volume region can be confirmed by the overall noise value shown in FIG. 3, and the frequency analysis data of FIG. Among the noise peak values generated in this cycle, a reduction effect at 800 Hz, which indicates the maximum value, has been confirmed, which contributes to the reduction in the overall value.

本発明に成るサイドカットファンは、実装スペースの拡大を派生することなしに、プロペラ転回時の外周円弧面と、風洞外側円弧面との空隙の変化での、圧力干渉の影響による騒音を抑制することができるので、省スペース用軸流ファンとしてのサイドカットファンの用途を拡大することを可能とする。 The side cut fan according to the present invention suppresses noise due to the influence of pressure interference caused by the change in the gap between the outer peripheral arc surface and the wind tunnel outer arc surface during propeller rotation without deriving an increase in mounting space. Therefore, it is possible to expand the application of the side cut fan as a space-saving axial fan.

本発明に成るサイドカットファンの例のベンチュリ正面を見る説明図である。It is explanatory drawing which looks at the venturi front of the example of the side cut fan which concerns on this invention. 従来技術に成るサイドカットファンの例のベンチュリ正面を見る説明図である。It is explanatory drawing which looks at the venturi front of the example of the side cut fan used as a prior art. 図１の例と図２の例における騒音のオーバーオールでの比較データである。It is the comparison data in the overall of the noise in the example of FIG. 1 and the example of FIG. 図３の例のデータでの周波数分析結果を示す比較データである。FIG. 4 is comparison data showing a frequency analysis result in the data of the example of FIG. 3.

符号の説明Explanation of symbols

１ サイドカットファン
２ ベンチュリ
２−１ サイドカット部
３ 風洞
３−１ サイドカット部内面の円弧径連通部
３−２ 初期風洞外側円弧面
３−３ 風洞内側円弧面 DESCRIPTION OF SYMBOLS 1 Side cut fan 2 Venturi 2-1 Side cut part 3 Wind tunnel 3-1 Arc diameter communicating part of side cut part inner surface 3-2 Initial wind tunnel outer side arc surface 3-3 Wind tunnel inner side arc surface

Claims (3)

ベンチュリとプロペラを有する軸流ファンで、実装スペースの制約上、ベンチュリ外周面の一部に所定の切除部が設けられ、風洞外側円弧面の一部を成す前記切除部の内周面が、ベンチュリの初期円弧径と異なる円弧径で連通するように形成されている所謂サイドカットファンにおいて、前記切除部に対し周方向で変移した部位にも、前記初期円弧径と異なる別の追加円弧径連通部が形成されていること、を特徴とするサイドカットファン。 The axial fan having a venturi and a propeller is provided with a predetermined cutout portion on a part of the venturi outer peripheral surface due to restrictions on the mounting space, and the inner peripheral surface of the cutout portion forming a part of the wind tunnel outer arc surface is a venturi In the so-called side cut fan formed so as to communicate with an arc diameter different from the initial arc diameter, another additional arc diameter communicating portion different from the initial arc diameter is also present in a portion shifted in the circumferential direction with respect to the cut portion. A side-cut fan characterized in that is formed. 前記所定の切除部が、互いに１８０度で対向する２箇所の切除部であって、前記追加円弧径連通部が、前記所定の切除部に対し、周方向９０度変移する部位に形成されていること、を特徴とする請求項１に記載のサイドカットファン。 The predetermined excision part is two excision parts facing each other at 180 degrees, and the additional arc diameter communication part is formed at a site that is shifted by 90 degrees in the circumferential direction with respect to the predetermined excision part. The side-cut fan according to claim 1. 前記所定の切除部内周面の円弧径連通部と、追加前記追加円弧径連通部が、いずれも同一円弧径をもって形成され、隣接する初期円弧径に連通していること、を特徴とする請求項２又は３に記載のサイドカットファン。 The arc diameter communicating portion on the inner peripheral surface of the predetermined cut portion and the additional arc diameter communicating portion are both formed with the same arc diameter and communicated with the adjacent initial arc diameter. The side cut fan according to 2 or 3.
JP2007088806A 2007-03-29 2007-03-29 Side cut fan Active JP4611333B2 (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60107391U (en) * 1983-12-22 1985-07-22 日本サ−ボ株式会社 fan motor
JPH0389997U (en) * 1989-12-28 1991-09-12
JPH0630499U (en) * 1992-09-22 1994-04-22 日本サーボ株式会社 Axial fan
JPH11223196A (en) * 1998-02-05 1999-08-17 Japan Servo Co Ltd Rotor of axial fan
JP2001349299A (en) * 2000-06-06 2001-12-21 Hisashi Akaishi Axial blower
JP2005076473A (en) * 2003-08-28 2005-03-24 Japan Servo Co Ltd Fan motor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60107391U (en) * 1983-12-22 1985-07-22 日本サ−ボ株式会社 fan motor
JPH0389997U (en) * 1989-12-28 1991-09-12
JPH0630499U (en) * 1992-09-22 1994-04-22 日本サーボ株式会社 Axial fan
JPH11223196A (en) * 1998-02-05 1999-08-17 Japan Servo Co Ltd Rotor of axial fan
JP2001349299A (en) * 2000-06-06 2001-12-21 Hisashi Akaishi Axial blower
JP2005076473A (en) * 2003-08-28 2005-03-24 Japan Servo Co Ltd Fan motor

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