JP2006077619A

JP2006077619A - Axial fan

Info

Publication number: JP2006077619A
Application number: JP2004260683A
Authority: JP
Inventors: Junichi Ikeda; 池田純一
Original assignee: Japan Servo Corp
Current assignee: Nidec Advanced Motor Corp
Priority date: 2004-09-08
Filing date: 2004-09-08
Publication date: 2006-03-23

Abstract

<P>PROBLEM TO BE SOLVED: To provide an axial fan capable of providing the cooling effect of reducing a variation regardless of a load, by particularly improving the performance deterioration in a high pressure area up to reaching a large air volume area from the high pressure area. <P>SOLUTION: This axial fan has a venturi case, an electric motor connected and held by a leg formed integrally with the venturi case, and an impeller formed integrally with a rotor of the electric motor and having a blade freely rotatable in an air tunnel part of the venturi case; and is constituted so that the leg integral with the venturi case is arranged on the suction port side, and a distance between the suction port side edge of the blade and the suction port side edge of the venturi case, is set as much as 1/3 or more of the whole width of the venturi case. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、被冷却側の実装密度の高まりで、冷却ファンが高圧領域で使用されるケースが多くなっていることから、高圧領域での実用に適した軸流ファンへのニーズが高まっている。 In the present invention, as the mounting density on the cooled side increases, the number of cases in which the cooling fan is used in the high pressure region has increased, and thus there is an increasing need for an axial fan suitable for practical use in the high pressure region. .

従来汎用されている軸流ファンは、図２に見るように、ベンチュリケースと一体を成す脚は吐出口側に設けられ、該固定された脚部が羽根車の回転で送り出される空気の流れの妨げとなって、いわゆるサージングポイントの発生に係る性能劣化や騒音の増加を余儀なくされるほか、翼の端縁が吸込口に近接して配置されている事から、圧力側での流入する空気の流れに乱れが生じるための性能低下も改善の目標となっていた。 As shown in FIG. 2, the conventional axial fan has a leg integrated with the venturi case on the discharge port side, and the fixed leg of the flow of air sent out by the rotation of the impeller. In addition to obstructing performance degradation and noise increase related to the occurrence of so-called surging points, the blade edge is located close to the suction port, so the inflow of air on the pressure side Performance degradation due to turbulence in the flow was also a goal of improvement.

上述実働の際の問題点に対応する為、多くの改良の提案が成され実開平０１−０９５５９６号や実開平０３−０４７４９９号も、その一例であるが、詳細は省く。 In order to deal with the above-mentioned problems in actual operation, many proposals for improvement have been made, and Japanese Utility Model Laid-Open Nos. 01-095596 and 03-047499 are examples, but the details are omitted.

実開平０１−０９５５９６号公報Japanese Utility Model Publication No. 01-095596 実開平０３−０４７４９９号公報Japanese Utility Model Publication No. 03-047499

上述のような従来技術に成る軸流ファンの解決すべき課題は、高圧領域から大風量領域に至る間、特に高圧領域での性能劣化を改善し、負荷の如何に拘わらず変動の少ない冷却効果を得ることが課題となっている。 The problems to be solved by the conventional axial fan as described above are to improve the performance deterioration in the high pressure region from the high pressure region, especially in the high pressure region, and the cooling effect with little fluctuation regardless of the load. It has become a problem to obtain.

本発明に成る軸流ファンは、ベンチュリケースと、該ベンチュリケースと一体を成す脚で連結保持された電動機と、該電動機の回転子と一体を成し前記ベンチュリケースの風洞部内を回転自在の翼を備える羽根車とを備え、前記ベンチュリケースと一体の脚が、吸込口側に設けられると共に、前記翼の吸込口側端縁とベンチュリケースの吸込口側端縁との距離が、ベンチュリケースの全幅の１／３以上となるように形成されている。 An axial fan according to the present invention includes a venturi case, an electric motor connected and held by a leg that is integrated with the venturi case, and a blade that is integrated with a rotor of the electric motor and is rotatable in a wind tunnel portion of the venturi case. And a leg integral with the venturi case is provided on the suction port side, and the distance between the suction port side edge of the wing and the suction port side edge of the venturi case is the same as that of the venturi case. It is formed to be 1/3 or more of the entire width.

本発明に成る軸流ファンは、高圧領域から大風量領域に至る間、特に高圧領域でのいわゆるサージングポイントの発生を抑制して、性能劣化を改善し負荷の如何に拘わらず変動の少ない冷却効果を得ることを可能としている。 The axial fan according to the present invention suppresses the occurrence of so-called surging points in the high-pressure region from the high-pressure region, particularly in the high-pressure region, thereby improving the performance deterioration and reducing the cooling effect regardless of the load. It is possible to get.

図１は本発明に成る軸流ファンの例の断面図、図３は、その性能改善の様子を示す説明図である。 FIG. 1 is a cross-sectional view of an example of an axial fan according to the present invention, and FIG. 3 is an explanatory view showing the performance improvement.

図１に見るように、本願発明の軸流ファンは、ベンチュリケースと一体を成す脚が、図左方の吸込口側に位置し、右方の吐出口側には、風洞部を通る空気の流れを妨げるものは排除されている。 As shown in FIG. 1, the axial fan according to the present invention has a leg that is integral with the venturi case, located on the suction port side on the left side of the figure, and on the right discharge port side, air that passes through the wind tunnel portion. Those that obstruct the flow are excluded.

羽根車の回転により翼で圧送される空気の流れは、風洞から円滑に送り出されるので、圧力側の性能の低下も無く、空気の流れの乱れも減少するので騒音の発生も低減する。 Since the air flow pumped by the blades by the rotation of the impeller is smoothly sent out from the wind tunnel, the performance on the pressure side is not deteriorated, and the disturbance of the air flow is reduced, so that the generation of noise is reduced.

図４は、従来技術に成る軸流ファンで問題視されている、いわゆるサージングポイントの存在を示す特性曲線で、図３に、該図４の特性と本願発明に成る軸流ファンでの特性との有意差を例示している。 FIG. 4 is a characteristic curve showing the existence of a so-called surging point, which is considered a problem in the axial fan according to the prior art. FIG. 3 shows the characteristics of FIG. 4 and the characteristics of the axial fan according to the present invention. The significant difference is illustrated.

そして、上記特性改善に適った条件として、翼の吸込口側端縁とベンチュリケースの吸込口側端縁との距離が、ベンチュリケースの全幅の１／３以上とすることが、より効果的であることを確認している。 As a condition suitable for the above characteristic improvement, it is more effective that the distance between the suction port side edge of the blade and the suction port side edge of the venturi case is 1/3 or more of the entire width of the venturi case. Confirm that there is.

本発明に成る軸流ファンは、高圧領域から大風量領域に至る間、特に高圧領域での性能劣化を改善することで、負荷の如何に拘わらず変動の少ない冷却効果を得ることを可能とし、益々実装密度の高まる被冷却部材への適用を拡張することを可能としている。 The axial fan according to the present invention improves the performance deterioration in the high pressure region from the high pressure region to the large air flow region, and can obtain a cooling effect with little fluctuation regardless of the load. This makes it possible to expand the application to a member to be cooled that has a higher mounting density.

本発明に成る軸流ファンの例を説明する断面図である。It is sectional drawing explaining the example of the axial fan which concerns on this invention. 従来技術に成る軸流ファンの例を説明する断面図である。It is sectional drawing explaining the example of the axial fan used as a prior art. 本願発明技術と従来汎用技術による性能の一例を比較する特性図である。It is a characteristic view which compares an example of the performance by this invention technology and conventional general purpose technology. 従来技術に成る軸流ファンで生じるサージングポイントを説明する特性図である。It is a characteristic view explaining the surging point which arises with the axial fan used as a prior art.

Explanation of symbols

１ベンチュリケース
１−１脚（支柱）
１−２風洞部
２羽根車
２−１翼
３電動機 1 Venturi case 1-1 Leg (support)
1-2 Wind tunnel part 2 Impeller 2-1 Wing 3 Electric motor

Claims

An axial flow comprising a venturi case, an electric motor connected and held by a leg that is integral with the venturi case, and an impeller that is integral with a rotor of the electric motor and includes a blade that is rotatable in the wind tunnel portion of the venturi case In the fan, legs integrated with the venturi case are provided on the suction port side, and the distance between the suction port side edge of the blade and the suction port side edge of the venturi case is 1/3 of the entire width of the venturi case. An axial fan characterized by being formed as described above.