JP2011174403A - Blower fan - Google Patents

Blower fan Download PDF

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JP2011174403A
JP2011174403A JP2010038429A JP2010038429A JP2011174403A JP 2011174403 A JP2011174403 A JP 2011174403A JP 2010038429 A JP2010038429 A JP 2010038429A JP 2010038429 A JP2010038429 A JP 2010038429A JP 2011174403 A JP2011174403 A JP 2011174403A
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blade
blades
housing
blower fan
connecting portion
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JP5534417B2 (en
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Katsunobu Hanetani
勝伸 羽谷
Osamu Sekiguchi
治 関口
Taro Tanno
太郎 旦野
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Nidec Advanced Motor Corp
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Nidec Servo Corp
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00Pumping installations or systems
    • F04D25/02Units comprising pumps and their driving means
    • F04D25/06Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F04D25/0613Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/40Casings; Connections of working fluid
    • F04D29/52Casings; Connections of working fluid for axial pumps
    • F04D29/522Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
    • F04D29/526Details of the casing section radially opposing blade tips

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blower fan suppressing the degradation of impeller characteristics due to the interference of an air flow generated by the rotation of blades with the connection part, exerting cooling effects in the peripheral direction while maintaining cooling effects in the axial direction. <P>SOLUTION: The blower fan 2 includes an approximately cylindrical cup part 10, the plurality of blades 11 to be rotated together with the cup part 10, a motor for rotating the plurality of blades 11, and a housing 30 storing the plurality of blades 11 and others. The plurality of blades 11 are connected to one another via the approximately annular connection part 12, and partitioned into radially inside portions 11A and radially outside portions 11B with the connection part 12. The connection part 12 is formed 70-90% of the blade length along the radial direction of each blade 11, distant from the root of the blade 11 on the outer peripheral face of the cup part 10. On the side of the housing 30, an opening portion 30a is formed in communication with the inside of the housing 30. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、中心軸に沿った空気流を発生させるインペラを備えた送風ファンに関する。   The present invention relates to a blower fan provided with an impeller that generates an air flow along a central axis.

従来のいわゆる軸流ファン(送風ファン)に用いられるインペラは、円筒状のインペラカップの外周面に固定された複数の翼が中心軸を中心に回転することによって、中心軸の方向に沿った空気流を発生させる。   An impeller used in a conventional so-called axial fan (air blower fan) is configured such that a plurality of blades fixed to the outer peripheral surface of a cylindrical impeller cup rotate around the central axis, thereby causing air along the direction of the central axis. Generate a flow.

ここで、インペラが回転する際、翼には径方向の遠心力が働く。この遠心力による影響は、インペラを高速で回転させるほど顕著になる。また、前進度合が大きい翼の場合、翼の径方向外端が、翼の付け根よりも回転方向前方に位置するため、翼の各部位において発生する遠心力によって、翼の付け根に大きなモーメントが発生する。従って、インペラは、このような遠心力による影響を考慮した強度設計が要求される。   Here, when the impeller rotates, a radial centrifugal force acts on the blade. The effect of this centrifugal force becomes more pronounced as the impeller rotates at a higher speed. In the case of a wing with a high degree of advancement, the radial outer end of the wing is positioned forward in the rotational direction of the wing root, so a large moment is generated at the wing root due to the centrifugal force generated at each part of the wing. To do. Therefore, the impeller is required to have a strength design that considers the influence of such centrifugal force.

この遠心力の影響を低減するために、複数の翼を環状の連結部で互いに連結することによって、遠心力に対する翼の強度を高める技術が、米国特許出願公開第2008/0056899号明細書、米国特許第6554574号明細書、米国特許第6241474号明細書等に記載されている。   In order to reduce the influence of this centrifugal force, a technique for increasing the strength of a blade against centrifugal force by connecting a plurality of blades to each other with an annular connecting portion is disclosed in US Patent Application Publication No. 2008/0056899, US It is described in Japanese Patent No. 6554574, US Pat. No. 6,241,474, and the like.

一方、送風ファンを、電子機器内の発熱体を冷却するのに用いる場合、送風ファンの冷却効果を高めるために風量特性を向上させることに加え、送風ファンの動作に伴う騒音を低減させることが要求される。   On the other hand, when the blower fan is used to cool the heating element in the electronic device, in addition to improving the air flow characteristic in order to enhance the cooling effect of the blower fan, it is possible to reduce the noise accompanying the operation of the blower fan. Required.

送風ファンの動作に伴う騒音を低減するために、インペラを収容するハウジングの側部に開口部を設け、この開口部を介して、ハウジング外からハウジング内に空気を取り込むことによって、騒音の原因となる乱流を整流して、騒音を低減する技術が、特開2008−267176号公報、特開平4−183998号公報等に記載されている。また、米国特許出願公開第2005/0180849号明細書には、側部に開口部が設けられたハウジングに、複数の翼が環状の連結部で連結されたインペラを収容した軸流ファンが記載されている。
米国特許出願公開第2008/0056899号明細書 米国特許第6554574号明細書 米国特許第6241474号明細書 特開2008−267176号公報 特開平4−183998号公報 米国特許出願公開第2005/0180849号明細書
In order to reduce the noise caused by the operation of the blower fan, an opening is provided on the side of the housing that houses the impeller, and air is taken into the housing from the outside of the housing through this opening. Japanese Patent Application Laid-Open No. 2008-267176, Japanese Patent Application Laid-Open No. 4-183998, and the like describe techniques for rectifying the turbulent flow to reduce noise. In addition, US Patent Application Publication No. 2005/0180849 describes an axial fan in which an impeller in which a plurality of blades are connected by an annular connecting portion is housed in a housing having an opening at a side portion. ing.
US Patent Application Publication No. 2008/0056899 US Pat. No. 6,554,574 US Pat. No. 6,241,474 JP 2008-267176 A JP-A-4-183998 US Patent Application Publication No. 2005/0180849

しかしながら、上記特許文献1〜3には、翼の回転によって発生する空気流と連結部との干渉によるインペラ特性の影響は考慮されていない。   However, the above Patent Documents 1 to 3 do not consider the influence of the impeller characteristics due to the interference between the air flow generated by the rotation of the blades and the connecting portion.

また、上記特許文献4〜6は、ハウジングの側部に設けられた開口部を介して、ハウジング外からハウジング内に空気を取り込むことによって騒音を低減するもので、軸流ファンの周方向における冷却効果については全く考慮されていない。   In addition, Patent Documents 4 to 6 reduce noise by taking air into the housing from the outside of the housing through an opening provided on the side of the housing, and cooling the axial fan in the circumferential direction. The effect is not considered at all.

本発明は、翼の回転によって発生する空気流と連結部との干渉によるインペラ特性の低下を抑制したインペラを備え、かつ、軸方向の冷却効果を維持しつつ、周方向の冷却効果を発揮する送風ファンを提供することにある。   The present invention includes an impeller that suppresses a decrease in impeller characteristics due to interference between an air flow generated by rotation of a blade and a coupling portion, and exhibits a circumferential cooling effect while maintaining an axial cooling effect. It is to provide a blower fan.

上記課題を解決するために、本発明は、複数の翼を互いに連結する環状の連結部を備えたインペラにおいて、複数の翼を、連結部によって、径方向内側の部位と径方向外側の部位とに区画し、かつ、複数の翼を収容するハウジングの側部に、ハウジング内に連通する開口部を形成した構成を採用する。   In order to solve the above-described problems, the present invention provides an impeller having an annular coupling portion that couples a plurality of blades to each other, and the plurality of blades are connected to a radially inner portion and a radially outer portion by the coupling portion. A configuration is adopted in which an opening communicating with the inside of the housing is formed in a side portion of the housing which is partitioned into two and accommodates a plurality of blades.

すなわち、本発明の一側面における送風ファンは、中心軸を中心に回転する略円筒状のカップ部と、カップ部の外周面に固定され、カップ部と共に回転することにより、軸方向の一方から吸気し、軸方向の他方に排気する複数の翼と、複数の翼をカップ部と共に回転させるモータと、カップ部と複数の翼とモータとを収容するハウジングとを備え、複数の翼は、略環状の連結部で互いに連結されると共に、連結部によって、径方向内側の部位と、径方向外側の部位とに区画されており、連結部は、翼の径方向に沿った翼長に対して、翼のカップ部外周面における付け根から、翼長の70%〜90%の位置に、略円筒形状に形成されており、ハウジングの側部に、ハウジング内に連通する開口部が形成されていることを特徴とする。   That is, the blower fan according to one aspect of the present invention is fixed to the substantially cylindrical cup portion that rotates about the central axis and the outer peripheral surface of the cup portion, and rotates together with the cup portion, thereby sucking air from one side in the axial direction. And a plurality of blades for exhausting in the other axial direction, a motor for rotating the blades together with the cup portion, and a housing for housing the cup portion, the plurality of blades, and the motor. Are connected to each other by a connecting portion, and are divided into a radially inner portion and a radially outer portion by the connecting portion, and the connecting portion is relative to the blade length along the radial direction of the blade, It is formed in a substantially cylindrical shape at a position of 70% to 90% of the blade length from the base of the outer peripheral surface of the cup portion of the blade, and an opening communicating with the inside of the housing is formed on the side portion of the housing. It is characterized by.

送風ファンをこのように構成することによって、連結部によって区画された径方向内側の部位における翼の回転によって、軸方向の一方から吸気された空気は、軸方向の他方に排気され、連結部によって区画された径方向外側の部位における翼の回転によって、軸方向の一方から吸気された空気の一部は、開口部を介して、ハウジング側部において径方向外方に排気される。   By configuring the blower fan in this way, the air sucked from one of the axial directions is exhausted to the other axial direction by the rotation of the blades at the radially inner portion partitioned by the connecting portion, and the connecting portion A part of the air sucked from one of the axial directions is exhausted radially outward at the housing side portion through the opening due to the rotation of the blades at the partitioned radially outer portion.

本発明によれば、複数の翼を互いに連結する環状の連結部を備えたインペラにおいて、連結部を、翼の径方向に沿った翼長に対して、翼の付け根から翼長の70%〜90%の位置に形成することによって、空気流と連結部との干渉による騒音の増加が抑制できると共に、複数の翼を収容するハウジングの側部に開口部を形成することによって、軸方向の冷却効果を維持しつつ、周方向の冷却効果を発揮する送風ファンを実現できる。   According to the present invention, in the impeller having an annular coupling portion that couples a plurality of blades to each other, the coupling portion is 70% to the blade length from the root of the blade to the blade length along the radial direction of the blade. By forming it at the 90% position, an increase in noise due to interference between the air flow and the connecting portion can be suppressed, and by forming an opening in the side portion of the housing that accommodates the plurality of blades, axial cooling is achieved. A blower fan that exhibits a cooling effect in the circumferential direction while maintaining the effect can be realized.

本発明の一実施形態におけるインペラの中心軸方向吸気側から見た平面図である。It is the top view seen from the central-axis direction intake side of the impeller in one Embodiment of this invention. 図1のインペラの側面図である。It is a side view of the impeller of FIG. 異なる位置に連結部が形成されたインペラの複数のサンプルについて、各インペラの静圧特性及び騒音特性を示したグラフである。It is the graph which showed the static pressure characteristic and noise characteristic of each impeller about the some sample of the impeller in which the connection part was formed in a different position. 本発明の一実施形態における送風ファンの構成を示した断面図である。It is sectional drawing which showed the structure of the ventilation fan in one Embodiment of this invention. 本発明の一実施形態における送風ファンの空気流を模式的に示した断面図である。It is sectional drawing which showed typically the airflow of the ventilation fan in one Embodiment of this invention. 本発明の一実施形態における送風ファンの静圧−風量特性の一例を示したグラフである。It is the graph which showed an example of the static pressure-air volume characteristic of the ventilation fan in one Embodiment of this invention. 本発明の一実施形態における一体成形されたハウジング、ベース部、軸受保持部、及び静翼の構成を示した斜視図である。It is the perspective view which showed the structure of the housing integrally molded in one Embodiment of this invention, a base part, a bearing holding | maintenance part, and a stationary blade.

以下、本発明の実施形態を図面に基づいて詳細に説明する。なお、本実施形態における説明では、中心軸に平行な方向を「軸方向」とし、中心軸を中心とする半径方向を「径方向」としている。なお、本発明は、以下の実施形態に限定されるものではない。また、本発明の効果を奏する範囲を逸脱しない範囲で、適宜変更は可能である。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the description of the present embodiment, a direction parallel to the central axis is referred to as “axial direction”, and a radial direction centered on the central axis is referred to as “radial direction”. In addition, this invention is not limited to the following embodiment. Moreover, it can change suitably in the range which does not deviate from the range which has the effect of this invention.

図1は、本発明の一実施形態におけるインペラ1の中心軸方向吸気側から見た平面図で、図2は、図1のインペラ1の側面図である。   FIG. 1 is a plan view of an impeller 1 according to an embodiment of the present invention as viewed from the intake side in the central axis direction, and FIG. 2 is a side view of the impeller 1 of FIG.

本実施形態におけるインペラ1は、図1及び図2に示すように、中心軸Jを中心に回転する略円筒状のカップ部10と、カップ部10の外周面10aに固定され、カップ部10と共に回転することにより、軸方向の一方から吸気し、軸方向の他方に排気する複数の翼11と、複数の翼11を互いに連結する略環状の連結部12とを備えている。ここで、連結部12は、中心軸Jを中心とした任意の円に沿って周方向に、略円筒形状に形成されている。   As shown in FIGS. 1 and 2, the impeller 1 in the present embodiment is fixed to a substantially cylindrical cup portion 10 that rotates about a central axis J and an outer peripheral surface 10 a of the cup portion 10. By rotating, a plurality of blades 11 that intake air from one side in the axial direction and exhaust air to the other side in the axial direction, and a substantially annular connecting portion 12 that connects the plurality of blades 11 to each other are provided. Here, the connection part 12 is formed in the substantially cylindrical shape in the circumferential direction along the arbitrary circle centering on the central axis J. As shown in FIG.

本願発明者等は、翼11の回転によって発生する空気流と連結部12との干渉によるインペラ特性の影響を検討した結果、翼11の径方向における連結部12の形成位置に関して重要な知見を得た。   The inventors of the present application have studied the influence of the impeller characteristics due to the interference between the air flow generated by the rotation of the blade 11 and the connecting portion 12, and as a result, obtained important knowledge regarding the formation position of the connecting portion 12 in the radial direction of the blade 11. It was.

図3は、翼11の径方向に対して異なる位置に連結部12が形成されたインペラ1の複数のサンプルA〜Eについて、インペラ1の静圧特性及び騒音特性をそれぞれ示したグラフである。ここで、サンプルA〜Eは、図1に示すように、連結部12を、翼11の径方向に沿った翼長Laに対して、翼11のカップ部外周面10aにおける付け根から連結部12までの距離Lbが、翼長Laの50%、70%、80%、90%、100%になる位置にそれぞれ形成したものである。図中の曲線G1b〜G5bは、サンプルA〜Eの風量と静圧との関係を、また、曲線G1a〜G5aは、サンプルA〜Eの風量と騒音との関係を、それぞれ測定した結果を示したものである。   FIG. 3 is a graph showing the static pressure characteristics and noise characteristics of the impeller 1 for a plurality of samples A to E of the impeller 1 in which the connecting portions 12 are formed at different positions with respect to the radial direction of the blade 11. Here, in the samples A to E, as shown in FIG. 1, the connecting portion 12 is connected to the blade length La along the radial direction of the blade 11 from the root of the cup outer peripheral surface 10 a of the blade 11. Are formed at positions where the distance Lb is 50%, 70%, 80%, 90%, and 100% of the blade length La. Curves G1b to G5b in the figure show the results of measuring the relationship between the air volume and static pressure of samples A to E, and curves G1a to G5a show the results of measuring the relationship between the air volume and noise of samples A to E, respectively. It is a thing.

図3に示すように、連結部12の位置が50%、100%に対応するサンプルA、E(曲線G1a、G5a)では、連結部12の位置が70%、80%、90%に対応するサンプルB、C、D(曲線G2a、G3a、G4a)に比べて騒音が増大しているのが分かる。サンプルAで騒音が増大するのは、翼11の径方向の中央部は、空気流生成の寄与度が大きいため、空気流と連結部12との干渉が大きくなるためと考えられる。また、サンプルEで騒音が増大するのは、連結部12を翼11の径方向外端11bに設けると、連結部12とハウジングの側壁との隙間に、逆方向の空気流が発生するためと考えられる。   As shown in FIG. 3, in the samples A and E (curves G1a and G5a) where the position of the connecting portion 12 corresponds to 50% and 100%, the positions of the connecting portion 12 correspond to 70%, 80% and 90%. It can be seen that the noise increases compared to samples B, C, and D (curves G2a, G3a, and G4a). The reason for the increase in noise in sample A is considered to be that interference between the air flow and the connecting portion 12 becomes large in the central portion in the radial direction of the blade 11 because the contribution of air flow generation is large. Further, the noise increases in the sample E because the air flow in the reverse direction is generated in the gap between the connecting portion 12 and the side wall of the housing when the connecting portion 12 is provided at the radially outer end 11b of the blade 11. Conceivable.

従って、連結部12を、翼11の径方向に沿った翼長Laに対して、翼11の付け根から、翼長Laの70%〜90%の位置に形成することによって、連結部12の付与に起因した騒音の増加を抑制することができる。   Therefore, the connecting portion 12 is formed at a position 70% to 90% of the blade length La from the root of the blade 11 with respect to the blade length La along the radial direction of the blade 11. The increase in noise due to the noise can be suppressed.

また、連結部12は、翼11の径方向外端11bよりも径方向内方側に配置されるため、連結部12よりも径方向内方に位置する翼11の部位11Aにおいては、連結部12の内側面がハウジングの内側面の役目を担うことになる。すなわち、仮想的なハウジングの内側面(連結部12の内側面)と連結部12よりも径方向内方に位置する翼11の部位11Aとの間にはギャップがない。そのため、連結部12よりも径方向内方に位置する翼11の部位11Aにおいて、空気流の逆流が発生しにくくなり、逆流する空気流の大半は、連結部12よりも径方向外方に位置する翼11の部位11Bを通過することになる。その結果、連結部12よりも径方向外方に位置する翼11の部位11Bは、専ら空気流の逆流防止のために機能させることができる。これにより、連結部12よりも径方向内方に位置する翼11の部位11Aにおいてインペラ1の風量特性を確保しつつ、低風量側での静圧特性の改善を図ることができる。   In addition, since the connecting portion 12 is disposed on the radially inner side with respect to the radially outer end 11b of the blade 11, the connecting portion 12A is located at the portion 11A of the blade 11 positioned radially inward of the connecting portion 12. The inner surface of 12 serves as the inner surface of the housing. That is, there is no gap between the inner surface of the virtual housing (the inner surface of the connecting portion 12) and the portion 11 </ b> A of the wing 11 positioned radially inward of the connecting portion 12. Therefore, in the portion 11A of the blade 11 that is located radially inward of the connecting portion 12, it is difficult for the backflow of airflow to occur, and most of the backflowing airflow is located radially outward of the connecting portion 12. It will pass through the part 11B of the wing 11 to be performed. As a result, the portion 11B of the blade 11 positioned radially outward from the connecting portion 12 can function exclusively for preventing the backflow of airflow. Accordingly, it is possible to improve the static pressure characteristics on the low air volume side while securing the air volume characteristics of the impeller 1 at the portion 11A of the blade 11 positioned radially inward from the connecting portion 12.

なお、複数の翼11を連結部12で互いに連結することによって、遠心力に対する翼11の強度が高められるが、翼11が前進翼として構成されている場合、特にその効果が発揮される。ここで、前進翼とは、図1に示すように、翼11の回転方向Rの最前方に位置する前縁11aと、翼11の径方向外端に位置する翼端11bとの交点P1が、前縁11aとカップ部10の外周面10aとの交点P2よりも回転方向Rの前方側に位置するものをいう。また、前進度合が極端に大きい場合、すなわち、図1に示すように、翼11の回転方向Rの後方に位置する後縁11cと、翼11の径方向外端に位置する翼端11bとの交点P3が、翼11の回転方向Rの前方に位置する前縁11aと、カップ部10の外周面10aとの交点P2よりも回転方向Rの前方側に位置している場合に、さらにその効果が発揮し得る。   In addition, although the intensity | strength of the wing | blade 11 with respect to a centrifugal force is improved by mutually connecting the several wing | blade 11 with the connection part 12, when the wing | blade 11 is comprised as a forward wing | blade, the effect is exhibited. Here, as shown in FIG. 1, the forward wing is an intersection P1 between a leading edge 11a located at the forefront in the rotational direction R of the wing 11 and a wing tip 11b located at the radially outer end of the wing 11. In this case, the front edge 11a and the outer peripheral surface 10a of the cup portion 10 are located on the front side in the rotational direction R with respect to the intersection P2. Further, when the degree of advancement is extremely large, that is, as shown in FIG. 1, the trailing edge 11 c located rearward in the rotational direction R of the blade 11 and the blade tip 11 b located at the radially outer end of the blade 11. The effect is further obtained when the intersection point P3 is located on the front side in the rotation direction R from the intersection point P2 between the front edge 11a located in front of the blade 11 in the rotation direction R and the outer peripheral surface 10a of the cup portion 10. Can be demonstrated.

ところで、いわゆる軸流ファン(送風ファン)は、カップ部10の外周面に固定された複数の翼11を中心軸Jを中心に回転させることによって、中心軸Jの方向に沿った空気流を発生させて、排気側にある電子部品等の発熱体を冷却する。   By the way, a so-called axial fan (blower fan) generates an air flow along the direction of the central axis J by rotating a plurality of blades 11 fixed to the outer peripheral surface of the cup portion 10 about the central axis J. Then, a heating element such as an electronic component on the exhaust side is cooled.

しかしながら、電子機器内に搭載される電子部品等の高密度化により、電子機器内での発熱量が増加するに伴い、送風ファンの冷却効率の向上が要求されている。そうした中、軸方向排気側にある発熱体を冷却するだけでなく、ハウジングの側方にある発熱体も冷却できる送風ファンが実現できれば、冷却効率の向上が期待できる。   However, as the amount of heat generated in the electronic device increases as the density of electronic components and the like mounted in the electronic device increases, it is required to improve the cooling efficiency of the blower fan. Under such circumstances, if a blower fan capable of cooling not only the heating element on the axial exhaust side but also the heating element on the side of the housing can be realized, an improvement in cooling efficiency can be expected.

従来、インペラを収容するハウジングの側部に開口部を設けた送風ファンが提案されているが(特許文献4〜6を参照)、これらは全て、開口部を介してハウジング外からハウジング内に空気を取り込むことによって、騒音の原因となる乱流を整流し、あるいは、吸気効率を向上させて、騒音の低減やサージング現象の抑制を企図したものである。   Conventionally, a blower fan in which an opening is provided in a side portion of a housing that accommodates an impeller has been proposed (see Patent Documents 4 to 6), and all of these air flows into the housing from the outside of the housing through the opening. This is intended to rectify turbulent flow that causes noise or to improve intake efficiency to reduce noise and suppress surging.

すなわち、インペラを収容するハウジング内は、インペラの回転により生じる軸方向の空気流によって負圧になっている。従って、ハウジングの側部に開口部を設けた場合、必然的に、開口部を介してハウジング外からハウジング内に空気が取り込まれることになる。   That is, the inside of the housing that houses the impeller has a negative pressure due to the axial airflow generated by the rotation of the impeller. Therefore, when an opening is provided on the side of the housing, air is inevitably taken into the housing from outside the housing through the opening.

一方、上述したように、複数の翼11を環状の連結部12で互いに連結したインペラは、連結部12が仮想的なハウジングの内側面の役目を担うことにより、連結部12によって区画された径方向内側の部位11Aでは、専ら、軸方向に沿った空気流が生じ、径方向外側の部位11Bでは、専ら、逆流する空気流が生じる。従って、ハウジング内において、径方向内側の部位11Aの領域では負圧が大きく、径方向外方の部位11Bの領域では負圧が小さいことが考えられる。   On the other hand, as described above, the impeller in which the plurality of blades 11 are connected to each other by the annular connecting portion 12 has a diameter defined by the connecting portion 12 because the connecting portion 12 serves as an inner side surface of the virtual housing. In the region 11A on the inner side in the direction, an air flow is generated exclusively along the axial direction, and in the region 11B on the outer side in the radial direction, an air flow that flows backward is generated exclusively. Therefore, in the housing, it is conceivable that the negative pressure is large in the region 11A on the radially inner side, and the negative pressure is small in the region 11B on the radially outer side.

そこで、本願発明者等は、複数の翼11を環状の連結部12で互いに連結したインペラを、側部のほぼ全周に亘って開口部を設けたハウジングに収容して、インペラの風量特性を測定したところ、軸方向においては、開口部を設けていないハウジングに収容したインペラと同程度の風量特性が得られたともに、ハウジングの側部においても、径方向外方に向く空気流が観測できた。   Therefore, the inventors of the present application accommodate an impeller in which a plurality of blades 11 are connected to each other by an annular connecting portion 12 in a housing provided with an opening over substantially the entire circumference of the side portion, and thereby the airflow characteristics of the impeller. As a result of the measurement, in the axial direction, the same airflow characteristics as the impeller accommodated in the housing without the opening were obtained, and the air flow toward the radially outward direction was also observed at the side of the housing. It was.

これは、ハウジング内でも、径方向外方の部位11Bの領域では負圧が小さいため、径方向外方へ広がる遠心方向成分の空気流が、負圧に勝って、ハウジングの側部の開口部を介して、径方向外方に向く空気流が発生したものと考えられる。   This is because even in the housing, since the negative pressure is small in the region of the radially outer portion 11B, the air flow of the centrifugal component spreading radially outward overcomes the negative pressure, and the opening on the side portion of the housing It is considered that an air flow directed outward in the radial direction was generated through the.

本発明は、かかる知見に基づきなされたもので、複数の翼11を互いに連結する環状の連結部12を備えたインペラ1において、複数の翼11を、連結部12によって、径方向内側の部位11Aと径方向外側の部位11Bとに区画し、複数の翼11を収容するハウジングの側部に、ハウジング内に連通する開口部を形成した構成を採用する。   The present invention has been made on the basis of such knowledge, and in the impeller 1 including the annular coupling portion 12 that couples the plurality of blades 11 to each other, the plurality of blades 11 are connected to the radially inner portion 11A by the coupling portion 12. And a radially outer portion 11 </ b> B, and an opening that communicates with the inside of the housing is formed on the side of the housing that houses the plurality of blades 11.

図4は、本実施形態における送風ファン2の構成を模式的に示した断面図である。図4に示すように、送風ファン2は、中心軸Jを中心に回転する略円筒状のカップ部10と、カップ部10の外周面に固定され、カップ部10と共に回転することにより、軸方向の一方から吸気し、軸方向の他方に排気する複数の翼11と、複数の翼11をカップ部10と共に回転させるモータと、カップ部10と複数の翼11とモータとを収容するハウジング30とを備え、ハウジング30とベース部24とは静翼31で連結されている。   FIG. 4 is a cross-sectional view schematically showing the configuration of the blower fan 2 in the present embodiment. As shown in FIG. 4, the blower fan 2 is fixed to the substantially cylindrical cup portion 10 that rotates about the central axis J, and the outer peripheral surface of the cup portion 10. A plurality of blades 11 that take in air from one of them and exhaust it in the other axial direction, a motor that rotates the plurality of blades 11 together with the cup portion 10, and a housing 30 that houses the cup portion 10, the plurality of blades 11, and the motor, The housing 30 and the base portion 24 are connected by a stationary blade 31.

モータは、カップ部10の内周面に取り付けられたロータホルダ22及びロータマグネット23と、ステータコアにコイルを巻装してなるステータ26と、軸受保持部25の内側に固定されたスリーブ軸受21とを備えている。カップ部10の中心部に固定されたシャフト20は、スリーブ軸受21に挿入されて回転可能に支持されている。   The motor includes a rotor holder 22 and a rotor magnet 23 attached to the inner peripheral surface of the cup portion 10, a stator 26 in which a coil is wound around a stator core, and a sleeve bearing 21 fixed inside the bearing holding portion 25. I have. The shaft 20 fixed to the center portion of the cup portion 10 is inserted into a sleeve bearing 21 and is rotatably supported.

このように構成された送風ファン2は、ステータ26のコイルに駆動電流を供給することによって、ステータ26とロータマグネット23との間で回転トルクを発生させ、これにより、カップ部10の外周面10aに固定された複数の翼11が中心軸Jを中心に回転する。   The blower fan 2 configured in this manner generates a rotational torque between the stator 26 and the rotor magnet 23 by supplying a drive current to the coil of the stator 26, and thereby the outer peripheral surface 10 a of the cup portion 10. The plurality of wings 11 fixed to the center of the wing 11 rotate about the central axis J.

本発明において、送風ファン2は、連結部12が、翼11の径方向に沿った翼長に対して、翼11のカップ部10外周面における付け根から、翼長の70%〜90%の位置に形成されるとともに、ハウジング30の側部に、ハウジング30内に連通する開口部30aが形成されている。   In the present invention, in the blower fan 2, the connecting portion 12 is positioned 70% to 90% of the blade length from the root of the outer peripheral surface of the cup portion 10 of the blade 11 with respect to the blade length along the radial direction of the blade 11. In addition, an opening 30 a communicating with the inside of the housing 30 is formed on the side of the housing 30.

このように構成された送風ファン2は、図5に示すように、連結部12によって区画された径方向内側の部位11Aにおける翼11の回転によって、軸方向の一方(吸気側)から吸気された空気は、軸方向の他方(排気側)に排気され、また、連結部12によって区画された径方向外側の部位11Bにおける翼11の回転によって、軸方向の一方から吸気された空気の一部は、開口部30aを介して、ハウジング30側部において径方向外方に排気される。   As shown in FIG. 5, the blower fan 2 configured as described above was sucked from one side (the intake side) in the axial direction by the rotation of the blade 11 in the radially inner portion 11 </ b> A defined by the connecting portion 12. The air is exhausted to the other side (exhaust side) in the axial direction, and part of the air sucked from one side in the axial direction is caused by the rotation of the blades 11 in the radially outer portion 11B defined by the connecting portion 12. The air is exhausted radially outward at the side of the housing 30 through the opening 30a.

このように、軸方向の吸気側から吸気された空気を、軸方向の排気側に排出される空気流と、ハウジング30側部において径方向外方に排気される空気流とに仕分けすることによって、軸方向排気側にある発熱体を冷却するだけでなく、ハウジング30の側方にある発熱体を冷却することができる。これにより、冷却効率の高い送風ファンが実現できる。   In this way, the air sucked from the axial intake side is classified into an air flow exhausted to the axial exhaust side and an air flow exhausted radially outward at the side of the housing 30. In addition to cooling the heating element on the axial exhaust side, the heating element on the side of the housing 30 can be cooled. Thereby, the ventilation fan with high cooling efficiency is realizable.

なお、本発明において、径方向内側の部位11A、及び径方向外側の部位11Bにおける翼11の回転によって、軸方向の排気側に排出される空気流と、ハウジング30側部において径方向外方に排気される空気流とが完全に仕分けされる必要はなく、例えば、径方向外側の部位11Bにおける翼11の回転によって、軸方向の排気側に排出される空気流が生じていても構わない。   In the present invention, the air flow discharged to the exhaust side in the axial direction by the rotation of the blades 11 in the radially inner portion 11A and the radially outer portion 11B, and radially outward in the housing 30 side portion. The exhausted air flow need not be completely sorted. For example, the air flow discharged to the exhaust side in the axial direction may be generated by the rotation of the blades 11 in the radially outer portion 11B.

図6は、本実施形態における送風ファン2の静圧−風量特性の一例を示したグラフである。このグラフに示した風量は、軸方向排気側に排気される空気流の風量であるが、ハウジング30の側部に開口部30aを設けない送風ファンにおける風量と、それほど差はない。これは、連結部12によって区画された径方向外側の部位11Bでは、専ら、逆流する空気流が生じ、軸方向の空気流にはそれほど寄与せず、軸方向の空気流は、専ら、連結部12によって区画された径方向内側の部位11Aによって発生しているためである。   FIG. 6 is a graph showing an example of the static pressure-air volume characteristic of the blower fan 2 in the present embodiment. The air flow shown in this graph is the air flow of the air flow exhausted to the axial exhaust side, but is not so different from the air flow in the blower fan in which the opening 30a is not provided on the side of the housing 30. This is because, in the portion 11B on the radially outer side defined by the connecting portion 12, a backflowing air flow is generated and does not contribute much to the axial air flow, and the axial air flow is exclusively used by the connecting portion. This is because it is generated by the radially inner portion 11 </ b> A partitioned by 12.

図7は、ハウジング30、ベース部24、軸受保持部25、及び静翼31が、射出成形により一体的に形成された構成体を示した斜視図である。図7に示すように、開口部30aは、ハウジング30の側部のほぼ全面に亘って形成されていることが好ましい。これにより、開口部30aを介して、ハウジング30側部において径方向外方に排気される空気流の風量を多くできる。なお、開口部30aの大きさや、形状等は特に制限されず、ハウジング30の強度や、送風ファンの使用状況等を考慮して適宜定めればよい。   FIG. 7 is a perspective view showing a structure in which the housing 30, the base portion 24, the bearing holding portion 25, and the stationary blade 31 are integrally formed by injection molding. As shown in FIG. 7, the opening 30 a is preferably formed over almost the entire side of the housing 30. Thereby, the air volume of the air flow exhausted radially outward at the side portion of the housing 30 through the opening 30a can be increased. The size, shape, and the like of the opening 30a are not particularly limited, and may be appropriately determined in consideration of the strength of the housing 30 and the usage status of the blower fan.

1 インペラ
2 送風ファン
10 カップ部
10a カップ部外周面
11 翼
11A 翼の径方向内側の部位
11B 翼の径方向外側の部位
11a 翼の前縁
11b 翼の径方向外端
11c 翼の後縁
12 連結部
20 シャフト
21 スリーブ軸受
22 ロータホルダ
23 ロータマグネット
24 ベース部
25 軸受保持部
26 ステータ
30 ハウジング
30a 開口部
31 静翼
1 impeller
2 Blower fans
10 Cup part
10a Cup outer peripheral surface
11 Wings
11A Radial inner part of the wing
11B Radial outer part of the wing
11a Leading edge of the wing
11b Radial outer end of wing 11c Trailing edge of wing
12 Connecting part
20 shaft
21 Sleeve bearing
22 Rotor holder
23 Rotor magnet
24 Base part
25 Bearing holding part
26 Stator
30 Housing
30a opening
31

Claims (5)

中心軸を中心に回転する略円筒状のカップ部と、
前記カップ部の外周面に固定され、該カップ部と共に回転することにより、軸方向の一方から吸気し、軸方向の他方に排気する複数の翼と、
前記複数の翼を前記カップ部と共に回転させるモータと、
前記カップ部と前記複数の翼と前記モータとを収容するハウジングと、
を備え、
前記複数の翼は、略環状の連結部で互いに連結されると共に、該連結部によって、径方向内側の部位と、径方向外側の部位とに区画されており、
前記連結部は、前記翼の径方向に沿った翼長に対して、前記翼の前記カップ部外周面における付け根から、該翼長の70%〜90%の位置に、略円筒形状に形成されており、
前記ハウジングの側部に、該ハウジング内に連通する開口部が形成されている、送風ファン。
A substantially cylindrical cup portion that rotates about a central axis;
A plurality of blades that are fixed to the outer peripheral surface of the cup portion and rotate together with the cup portion, thereby sucking air from one axial direction and exhausting the other axial direction;
A motor for rotating the plurality of blades together with the cup portion;
A housing that houses the cup portion, the plurality of blades, and the motor;
With
The plurality of wings are connected to each other by a substantially annular connecting portion, and are divided into a radially inner portion and a radially outer portion by the connecting portion,
The connecting portion is formed in a substantially cylindrical shape at a position of 70% to 90% of the blade length from the root on the outer peripheral surface of the cup portion of the blade with respect to the blade length along the radial direction of the blade. And
A blower fan in which an opening communicating with the inside of the housing is formed in a side portion of the housing.
請求項1に記載の送風ファンにおいて、
前記複数の翼は、前進翼として構成されている、送風ファン。
The blower fan according to claim 1,
The plurality of blades is a blower fan configured as a forward blade.
請求項1に記載の送風ファンにおいて、
前記連結部によって区画された径方向内側の部位における翼の回転によって、軸方向の一方から吸気された空気は、軸方向の他方に排気され、
前記連結部によって区画された径方向外側の部位における翼の回転によって、軸方向の一方から吸気された空気の一部は、前記開口部を介して、前記ハウジング側部において径方向外方に排気される、送風ファン。
The blower fan according to claim 1,
By the rotation of the blades at the radially inner portion defined by the connecting portion, the air sucked from one of the axial directions is exhausted to the other of the axial directions,
A part of the air sucked from one of the axial directions by the rotation of the blades at the radially outer portion defined by the connecting portion is exhausted radially outward at the housing side portion through the opening. Be blown fan.
請求項1に記載の送風ファンにおいて、
前記開口部は、前記ハウジングの側部のほぼ全周に亘って形成されている、送風ファン。
The blower fan according to claim 1,
The said opening part is a ventilation fan currently formed over the perimeter of the side part of the said housing.
請求項1に記載の送風ファンにおいて、
前記翼の回転方向後方に位置する後縁と、前記翼の径方向外端に位置する翼端との交点は、前記翼の回転方向前方に位置する前縁と、前記カップ部外周面との交点よりも、回転方向前方側に位置している、送風ファン。
The blower fan according to claim 1,
The intersection of the trailing edge located at the rear of the blade in the rotational direction and the blade tip located at the radially outer end of the blade is defined by the front edge located at the forward direction of the blade and the outer peripheral surface of the cup part. A blower fan located on the front side in the rotational direction from the intersection.
JP2010038429A 2010-02-24 2010-02-24 Blower fan Expired - Fee Related JP5534417B2 (en)

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Publication number Priority date Publication date Assignee Title
JP2019504958A (en) * 2016-01-27 2019-02-21 広東美的環境電器制造有限公司 Fans and home appliances
JP2021060040A (en) * 2016-01-27 2021-04-15 広東美的環境電器制造有限公司Gd Midea Environment Appliances Mfg Co.,Ltd. Fan and consumer electronics

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