JP4935048B2 - Centrifugal fan - Google Patents

Centrifugal fan Download PDF

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JP4935048B2
JP4935048B2 JP2005312448A JP2005312448A JP4935048B2 JP 4935048 B2 JP4935048 B2 JP 4935048B2 JP 2005312448 A JP2005312448 A JP 2005312448A JP 2005312448 A JP2005312448 A JP 2005312448A JP 4935048 B2 JP4935048 B2 JP 4935048B2
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cup
impeller
wings
central axis
centrifugal fan
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JP2007120378A (en
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秀規 永松
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Nidec America Corp
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Nidec Corp
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Priority to CNB2006101374750A priority patent/CN100480516C/en
Priority to US11/588,397 priority patent/US20070098571A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F04D25/0613—Units 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/30—Vanes

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

Description

本発明は、送風に用いられる電動式の遠心ファンに関する。   The present invention relates to an electric centrifugal fan used for blowing air.

従来より、軸方向に吸気して径方向に排気する遠心ファンでは、回転軸を中心とする周方向に配列された複数の翼を有するインペラが設けられ、遠心ファンの静音化、風量特性の改善、および、モータの温度上昇に伴う性能低下を抑制するために、インペラに対して様々な工夫がなされている。   Conventionally, centrifugal fans that intake in the axial direction and exhaust in the radial direction are provided with an impeller having a plurality of blades arranged in the circumferential direction around the rotating shaft, making the centrifugal fan quieter and improving airflow characteristics And in order to suppress the performance fall accompanying the temperature rise of a motor, various devices are made | formed with respect to the impeller.

例えば、特許文献１では、ブレードの内側にインデューサ部を連結した多翼ファンが開示されており、吸い込み口から流入した気流をインデューサ部により乱流の発生を抑制しながらブレードまで導いて、騒音の低減とファンの効率を向上する技術が開示されており、特許文献２では、翼の形状をターボファンとシロッコファンとを組み合わせた形状とすることで、同サイズの一般的な形状のシロッコファンよりもファン効率を向上することができるインペラが開示されている。   For example, Patent Document 1 discloses a multiblade fan in which an inducer is connected to the inside of a blade, and guides an airflow flowing in from a suction port to the blade while suppressing the occurrence of turbulence by the inducer. A technique for reducing noise and improving fan efficiency is disclosed. Patent Document 2 discloses a sirocco having a general shape of the same size by combining the shape of a blade with a turbo fan and a sirocco fan. An impeller that can improve fan efficiency over a fan is disclosed.

また、特許文献３では、インペラ構造が、翼の内側に回転軸に垂直な板状の気流案内手段を備え、気流案内手段が気流の進行パス上に設けられて気流のパターンが変化することにより、騒音を低減させる技術が開示されており、特許文献４では、インペラ下部に翼間の風穴に連通する開口が設けられ、インペラが回転するときの騒音や電流値を低減することができる技術が開示されている。   Further, in Patent Document 3, the impeller structure includes a plate-shaped airflow guide means that is perpendicular to the rotation axis inside the blade, and the airflow guide means is provided on the traveling path of the airflow to change the airflow pattern. A technique for reducing noise is disclosed, and Patent Document 4 discloses a technique in which an opening communicating with an air hole between blades is provided at the lower part of an impeller, and noise and current values when the impeller rotates can be reduced. It is disclosed.

さらに、特許文献５では、インペラの中央のカップ部の途中から翼を支持するステーを設け、ロータハブがインペラのカップ部にて覆われないようにすることにより、小型シロッコファンにおいてエアの吸い込み口の面積減少に伴う風量特性の劣化やモータの回転数増大による騒音の増加を抑えることができる技術が開示されており、特許文献６では、シロッコファンの翼を連結する側板に貫通孔を設けることにより、この貫通孔が通風路となって内部に収納されるアウターロータモータの電機子へエアを供給し、電機子を冷却する技術が開示されている。
特開２００２−７０７９３号公報 特開２００５−６９１８３号公報 実用新案登録第３０２９２８７号公報 実用新案登録第３１０１６６０号公報 特開平７−１１１７５６号公報 実開昭５０−１３３５１１号公報 Further, in Patent Document 5, a stay that supports the blades is provided from the middle of the cup portion at the center of the impeller so that the rotor hub is not covered with the cup portion of the impeller, so that the air suction port of the small sirocco fan is provided. A technique that can suppress an increase in noise due to a decrease in air flow characteristics due to a decrease in area and an increase in the number of revolutions of a motor is disclosed. A technique for cooling the armature by supplying air to the armature of the outer rotor motor housed in the through hole as an air passage is disclosed.
JP 2002-70793 A JP 2005-69183 A Utility Model Registration No. 3029287 Utility Model Registration No. 3101660 Japanese Patent Laid-Open No. 7-111756 Japanese Utility Model Publication No. 50-133511

ところで、中央部にモータを収納するためのカップ部を有するインペラが用いられる遠心ファンではカップ部の外側面付近でエアの乱流が発生しやすく、その乱流がカップ部から外側に離れて周方向に配列される翼に流れ込むと遠心ファンの騒音が高くなってしまう。また、カップ部の内部にエアが供給がされにくいため、カップ部内に収納される電機子で発生した熱がこもり、電機子の温度上昇を抑えることも重要となる。   By the way, in a centrifugal fan in which an impeller having a cup portion for housing a motor in the center portion is used, air turbulence tends to occur near the outer surface of the cup portion, and the turbulence flows away from the cup portion to the outside. If it flows into the blades arranged in the direction, the noise of the centrifugal fan will increase. In addition, since air is not easily supplied to the inside of the cup portion, heat generated by the armature stored in the cup portion is accumulated, and it is important to suppress the temperature rise of the armature.

本発明は、上記課題に鑑みなされたものであり、電機子を収納するカップ部を中央に有する遠心ファンにおいて低騒音化を図ることを主たる目的としており、さらに、電機子にエアを効率よく供給して電機子の温度上昇を抑えることも目的としている。   The present invention has been made in view of the above problems, and has as its main purpose to reduce noise in a centrifugal fan having a cup portion in the center for housing an armature, and further efficiently supplies air to the armature. The purpose is to suppress the temperature rise of the armature.

請求項１に記載の発明は、遠心ファンであって、所定の中心軸を中心とする円筒状のヨーク部を有する略有底円筒状のカップ部と、前記カップ部の内側面に固定された界磁用磁石と、前記カップ部に接続されて前記カップ部の外側の環状の領域に放射状に配置された翼集合体を有し、前記カップ部と共に回転することにより前記カップ部の底部側からエアを取り込んで前記中心軸から離れる方向に前記エアを排出するインペラ部と、前記インペラ部の外周を覆う側壁部、前記カップ部の開口部側を覆うベース部、および、前記カップ部の前記底部に対向する吸気口が形成されたカバー部を有し、前記側壁部と前記インペラ部との間の流路の幅が排気口に向かって漸次広がるハウジングと、前記中心軸を中心に前記カップ部を前記ベース部に対して回転可能に支持する軸受機構と、前記ベース部に固定されて少なくとも一部が前記カップ部内に位置し、前記界磁用磁石との間で前記中心軸を中心とするトルクを発生する電機子とを備え、前記翼集合体が、前記インペラ部の外周に沿って配列された複数の主翼と、前記カップ部の外側面と前記複数の主翼との間において、前記カップ部の前記外側面に接続されるとともに前記ベース部側にて前記複数の主翼と直接または間接的に接続される複数の補助翼とを備え、前記複数の補助翼の前記ベース部とは反対側のエッジが外側へと伸びつつ前記ベース部に向かって傾斜しており、前記複数の主翼と前記複数の補助翼との間における前記インペラ部の前記中心軸方向の幅が前記複数の主翼の前記中心軸方向の長さの１／３以下である。 The invention according to claim 1 is a centrifugal fan, which is fixed to a substantially bottomed cylindrical cup portion having a cylindrical yoke portion centering on a predetermined central axis, and an inner surface of the cup portion. A field magnet and a blade assembly connected to the cup portion and radially disposed in an annular region outside the cup portion, and rotating from the bottom side of the cup portion by rotating together with the cup portion An impeller part for taking in air and discharging the air in a direction away from the central axis; a side wall part covering the outer periphery of the impeller part; a base part covering the opening part side of the cup part; and the bottom part of the cup part A housing having a cover portion formed with an air inlet facing the housing, wherein a width of a flow path between the side wall portion and the impeller portion gradually widens toward the exhaust port, and the cup portion around the central axis To the base An armature that generates torque centered on the central axis between the bearing mechanism that is rotatably supported and at least a part of the bearing mechanism that is fixed to the base portion and is located in the cup portion. The blade assembly is disposed on the outer surface of the cup portion between the plurality of main wings arranged along the outer periphery of the impeller portion, and the outer surface of the cup portion and the plurality of main wings. A plurality of auxiliary wings that are connected and connected directly or indirectly to the plurality of main wings on the base portion side, and the edges of the plurality of auxiliary wings opposite to the base portion are outward. the length of the elongation while being inclined toward the base portion, the central axis direction of the central axis direction of width of the plurality of wings of the impeller portion in between said plurality of auxiliary blades and the plurality of wing 1/3 or less.

請求項２に記載の発明は、請求項１に記載の遠心ファンであって、前記インペラ部が、前記複数の補助翼の間において前記中心軸方向に関して貫通する複数の開口を有する。   The invention according to claim 2 is the centrifugal fan according to claim 1, wherein the impeller portion has a plurality of openings penetrating in the direction of the central axis between the plurality of auxiliary blades.

請求項３に記載の発明は、請求項２に記載の遠心ファンであって、前記複数の補助翼の前記ベース部側のエッジが、前記カップ部の前記開口部から外側へと伸びつつ前記ベース部に向かって傾斜しており、前記複数の開口の前記ベース部側の開口端が前記エッジを含み、前記開口端の前記複数の主翼側の部位が前記中心軸側の部位よりも前記ベース部に近い。   The invention according to claim 3 is the centrifugal fan according to claim 2, wherein the base part side edges of the plurality of auxiliary blades extend outward from the opening of the cup part. The plurality of openings includes an opening end on the base portion side, and the plurality of main wing side portions of the opening end are located on the base portion side relative to the portion on the central axis side. Close to.

請求項４に記載の発明は、請求項１ないし３のいずれかに記載の遠心ファンであって、前記中心軸を中心とする環状板により前記複数の主翼の前記ベース部側の端部が連結されており、前記複数の補助翼の最も外側の部位が前記環状板の内側の部位と接続される。 A fourth aspect of the present invention is the centrifugal fan according to any one of the first to third aspects, wherein ends of the plurality of main wings on the base portion side are connected by an annular plate centering on the central axis. The outermost part of the plurality of auxiliary wings is connected to the inner part of the annular plate.

請求項５に記載の発明は、請求項１ないし４のいずれかに記載の遠心ファンであって、前記複数の補助翼のそれぞれが、前記複数の主翼のいずれかと連続している。 A fifth aspect of the present invention is the centrifugal fan according to any one of the first to fourth aspects, wherein each of the plurality of auxiliary wings is continuous with one of the plurality of main wings.

本発明では、補助翼によりカップ部の外側面近くを流れるエアによる乱流を抑制して遠心ファンの低騒音化を図ることができる。請求項２の発明では、補助翼およびこれらの間の開口により電機子にエアを供給し、電機子の温度上昇を抑えることができ、請求項３の発明では、電機子に向かって流れるエアの供給効率を向上することができる。請求項４の発明では効率よく乱流の発生を抑制することができる。また、請求項６の発明では、インペラ部の剛性を向上することができる。   In the present invention, it is possible to reduce the noise of the centrifugal fan by suppressing the turbulent flow caused by the air flowing near the outer surface of the cup portion by the auxiliary blade. According to the second aspect of the present invention, air can be supplied to the armature by the auxiliary wing and the opening between them, and the temperature rise of the armature can be suppressed. In the third aspect of the invention, the air flowing toward the armature can be suppressed. Supply efficiency can be improved. In the invention of claim 4, the generation of turbulent flow can be efficiently suppressed. In the invention of claim 6, the rigidity of the impeller portion can be improved.

図１は、本発明の一の実施の形態に係る遠心ファン１の構成を示す図であり、中心軸Ｊ１を含む平面で切断した縦断面を示す。図２は、遠心ファン１を示す平面図である。ただし、図１では左右両側にてハウジング１０の端の部分の図示が省略されており、図２ではハウジング１０上面のカバー部（図１中にて符号１１１を付す。）を外した状態を示している。図１および図２に示すように、遠心ファン１は、回転することによりエアの流れを発生するインペラ部２、および、インペラ部２に接続されてインペラ部２を所定の中心軸Ｊ１回りに回転するモータ３を備え、インペラ部２およびモータ３がハウジング１０に収納される。遠心ファン１は、例えば、電気製品や電子機器を空冷するための電動ファンとして用いられる。   FIG. 1 is a diagram showing a configuration of a centrifugal fan 1 according to an embodiment of the present invention, and shows a longitudinal section cut along a plane including a central axis J1. FIG. 2 is a plan view showing the centrifugal fan 1. However, in FIG. 1, illustration of the edge part of the housing 10 is abbreviate | omitted on both right and left sides, and FIG. 2 shows the state which removed the cover part (it is attached | subjected the code | symbol 111 in FIG. 1) of the housing 10 upper surface. ing. As shown in FIGS. 1 and 2, the centrifugal fan 1 is connected to the impeller unit 2 that generates an air flow by rotating, and the impeller unit 2 rotates around the predetermined central axis J <b> 1. The impeller unit 2 and the motor 3 are housed in the housing 10. The centrifugal fan 1 is used, for example, as an electric fan for air-cooling electrical products and electronic devices.

図１に示すように、ハウジング１０は、エアの取り込み口となる吸気口１２が形成されたカバー部１１１、および、後述するステータ部３１が取り付けられるベース部１１２を備え、さらに、図２に示すようにインペラ部２の外周を覆う側壁部１１３を備える。ハウジング１０は、カバー部１１１が、図２に示すベース部１１２および側壁部１１３を備えるハウジング本体１１に取り付けられることにより組み立てられ、ハウジング１０がインペラ部２を取り囲むことによりエアの流路が形成される（すなわち、インペラ部２の回転により発生したエアの流れがハウジング１０により整えられて送出される。）。側壁部１１３とインペラ部２との間の流路の幅は排気口１３（図２参照）に向かって漸次広がる形状とされ、ハウジング１０においてベース部１１２と側壁部１１３との間は閉塞されている。   As shown in FIG. 1, the housing 10 includes a cover portion 111 in which an intake port 12 serving as an air intake port is formed, and a base portion 112 to which a stator portion 31 to be described later is attached. Thus, the side wall part 113 which covers the outer periphery of the impeller part 2 is provided. The housing 10 is assembled by attaching the cover portion 111 to the housing main body 11 including the base portion 112 and the side wall portion 113 shown in FIG. 2, and an air flow path is formed by the housing 10 surrounding the impeller portion 2. (That is, the flow of air generated by the rotation of the impeller portion 2 is adjusted by the housing 10 and sent out). The width of the flow path between the side wall portion 113 and the impeller portion 2 is formed so as to gradually widen toward the exhaust port 13 (see FIG. 2), and the base 10 and the side wall portion 113 are blocked in the housing 10. Yes.

モータ３は、図１に示すように、アウターロータ型のモータであり、固定組立体であるステータ部３１、および、回転組立体であるロータ部３２を備え、ロータ部３２は、後述する軸受機構により中心軸Ｊ１を中心にステータ部３１に対して回転可能に支持される。以下の説明では、便宜上、中心軸Ｊ１に沿ってロータ部３２側を上側、ステータ部３１側を下側として説明するが、中心軸Ｊ１は必ずしも重力方向と一致する必要はない。   As shown in FIG. 1, the motor 3 is an outer rotor type motor, and includes a stator portion 31 that is a fixed assembly and a rotor portion 32 that is a rotating assembly. The rotor portion 32 includes a bearing mechanism described later. Thus, the stator part 31 is supported so as to be rotatable about the central axis J1. In the following description, for convenience, the rotor part 32 side is described as the upper side and the stator part 31 side is the lower side along the central axis J1, but the central axis J1 does not necessarily coincide with the direction of gravity.

ステータ部３１は、ハウジング１０の下面であるベース部１１２に固定され、ベース部１１２の中央部に形成された円筒状の部位には、中心軸Ｊ１を中心とする略円筒状であってベース部１１２から上側（すなわち、ロータ部３２側）に突出する軸受保持部３１１が取り付けられる。軸受保持部３１１の内側には、軸受機構となる玉軸受３１２，３１３が中心軸Ｊ１方向の上部および下部に設けられ、玉軸受３１３の下側には予圧用のバネ３１４が設けられる。   The stator portion 31 is fixed to the base portion 112 which is the lower surface of the housing 10, and a cylindrical portion formed in the central portion of the base portion 112 has a substantially cylindrical shape centered on the central axis J <b> 1. A bearing holding portion 311 that protrudes upward from 112 (that is, the rotor portion 32 side) is attached. Ball bearings 312 and 313 serving as a bearing mechanism are provided at the upper and lower portions in the direction of the central axis J1 inside the bearing holding portion 311, and a preload spring 314 is provided below the ball bearing 313.

ステータ部３１は、また、軸受保持部３１１の外周に固定される（すなわち、軸受保持部３１１の周囲にてベース部１１２に固定される）電機子３１５、および、電機子３１５とベース部１１２との間で電機子３１５に電気的に接続されるとともに電機子３１５への電流制御用の電子部品が実装された回路基板３１６をさらに備える。   The stator portion 31 is also fixed to the outer periphery of the bearing holding portion 311 (that is, fixed to the base portion 112 around the bearing holding portion 311), and the armature 315 and the base portion 112. And a circuit board 316 on which electronic components for current control to the armature 315 are mounted.

ロータ部３２は、中心軸Ｊ１を中心とする略有底円筒状であって開口部３２１１が下側を向く（すなわち、開口部３２１１がベース部１１２に対向する）カップ部３２１、カップ部３２１の内側面に固定されて電機子３１５と対向する略円筒状の界磁用磁石３２２、および、カップ部３２１の底部（すなわち、カップ部３２１の上端の略円板状の部位）から下側に突出するシャフト３２３を備える。   The rotor portion 32 has a substantially bottomed cylindrical shape centered on the central axis J1, and the opening portion 3211 faces downward (that is, the opening portion 3211 faces the base portion 112). A substantially cylindrical field magnet 322 that is fixed to the inner surface and faces the armature 315, and protrudes downward from the bottom of the cup portion 321 (that is, a substantially disc-shaped portion at the upper end of the cup portion 321). A shaft 323 is provided.

シャフト３２３は、カップ部３２１の底部に固定されたブッシュ３２４に圧入固定されることによりカップ部３２１に取り付けられており、軸受保持部３１１に挿入されて玉軸受３１２，３１３により回転可能に支持される。シャフト３２３の下端近傍にはバネ３１４を係止するための係止部材３２３１が取り付けられ、バネ３１４にて玉軸受３１３に予圧が与えられることにより、シャフト３２３および玉軸受３１２，３１３が適正な位置に保持される。   The shaft 323 is attached to the cup portion 321 by being press-fitted and fixed to a bush 324 fixed to the bottom portion of the cup portion 321, inserted into the bearing holding portion 311, and rotatably supported by ball bearings 312 and 313. The A locking member 3231 for locking the spring 314 is attached in the vicinity of the lower end of the shaft 323. Preload is applied to the ball bearing 313 by the spring 314, so that the shaft 323 and the ball bearings 312 and 313 are positioned at appropriate positions. Retained.

遠心ファン１では、玉軸受３１２，３１３が、中心軸Ｊ１を中心にカップ部３２１をベース部１１２に対して回転可能に支持する軸受機構の役割を果たし、回路基板３１６を介して電機子３１５に供給される駆動電流が制御されて電機子３１５と界磁用磁石３２２との間で中心軸Ｊ１を中心とするトルク（すなわち、回転力）が発生することにより、カップ部３２１と共にシャフト３２３、および、カップ部３２１に接続された翼集合体２２を有するインペラ部２が中心軸Ｊ１を中心として回転する。なお、シャフト３２３はブッシュ３２４を介さず、カップ部３２１に直接取り付けられてもよい。   In the centrifugal fan 1, the ball bearings 312 and 313 serve as a bearing mechanism that rotatably supports the cup portion 321 with respect to the base portion 112 around the central axis J 1, and the armature 315 is provided via the circuit board 316. The supplied drive current is controlled to generate torque (that is, rotational force) about the central axis J1 between the armature 315 and the field magnet 322, so that the shaft 323 together with the cup portion 321 and The impeller part 2 having the blade assembly 22 connected to the cup part 321 rotates around the central axis J1. The shaft 323 may be directly attached to the cup portion 321 without using the bush 324.

遠心ファン１では、カップ部３２１の開口部３２１１側はベース部１１２により覆われ、カップ部３２１の内側は中心軸Ｊ１を中心とする円筒状のヨーク部３２１ａを含む略有底円筒状のヨーク部材３２１２となっている。ヨーク部材３２１２は磁性を有する金属にて形成され、ヨーク部３２１ａの内側面に界磁用磁石３２２が取付られ、その底部の中央にブッシュ３２４が取り付けられる。カップ部３２１の外側は樹脂による略有底円筒状の外側カップ部３２１３となっており、インペラ部２の全体と一体的に成型され、ヨーク部材３２１２が圧入固定されている。カップ部３２１の構造は図１の構造には限定されず、例えば、ヨーク部材３２１２は円筒状とされ、その外側カップ部３２１３がシャフト３２３またはブッシュ３２４に接続されてもよく、あるいは、外側カップ部３２１３が省略されてインペラ部２が直接ヨーク部材３２１２の開口部に接続されてもよい。   In the centrifugal fan 1, the opening 3211 side of the cup portion 321 is covered by the base portion 112, and the inside of the cup portion 321 includes a cylindrical yoke portion 321a having a central axis J1 as a center, and a substantially bottomed cylindrical yoke member. 3212. The yoke member 3212 is made of a magnetic metal, and a field magnet 322 is attached to the inner surface of the yoke portion 321a, and a bush 324 is attached to the center of the bottom thereof. The outer side of the cup part 321 is a substantially bottomed cylindrical outer cup part 3213 made of resin, and is molded integrally with the entire impeller part 2, and the yoke member 3212 is press-fitted and fixed. The structure of the cup part 321 is not limited to the structure of FIG. 1. For example, the yoke member 3212 may be cylindrical, and the outer cup part 3213 may be connected to the shaft 323 or the bush 324. 3213 may be omitted and the impeller portion 2 may be directly connected to the opening of the yoke member 3212.

図３は、インペラ部２およびインペラ部２と一体的に成形される外側カップ部３２１３を示す斜視図である。インペラ部２は、図１ないし図３に示すように、カップ部３２１の外側の（中心軸Ｊ１を中心とする）環状の領域に放射状に配置された翼集合体２２を有する。遠心ファン１では、インペラ部２がカップ部３２１と共に回転することにより、インペラ部２の上側（すなわち、カップ部３２１の底部側）に対向する吸気口１２からエアが取り込まれて中心軸Ｊ１から離れる方向にエアが排出され、既述のようにエアが側壁部１１３に沿って排気口１３へと導かれる。   FIG. 3 is a perspective view showing the impeller portion 2 and the outer cup portion 3213 formed integrally with the impeller portion 2. As shown in FIGS. 1 to 3, the impeller portion 2 includes blade assemblies 22 arranged radially in an annular region (centered on the central axis J <b> 1) outside the cup portion 321. In the centrifugal fan 1, when the impeller portion 2 rotates together with the cup portion 321, air is taken in from the intake port 12 facing the upper side of the impeller portion 2 (that is, the bottom side of the cup portion 321) and leaves the central axis J <b> 1. The air is discharged in the direction, and the air is guided to the exhaust port 13 along the side wall portion 113 as described above.

翼集合体２２は、カップ部３２１（の外側カップ部３２１３）の外側面３２１ｂと間隔を開けつつインペラ部２の外周に沿って配列された複数の主翼２２１、および、カップ部３２１の外側面３２１ｂに沿ってカップ部３２１と複数の主翼２２１との間に配列された複数の補助翼２２２を備える。図２では主翼２２１の先端が一部を除いて隠れているが、複数の主翼２２１のそれぞれは、外側へと向かいつつインペラ部２の回転方向５１へと傾く前進翼となっている。複数の主翼２２１は、ベース部１１２側の下端部が中心軸Ｊ１に垂直であって中心軸Ｊ１を中心とする環状板２３により連結されるとともに上端部が環状の連結部２４により連結され、一体的に成形されている。なお、図２では主翼２２１の形状を示すために連結部２４の一部を削除している（図４〜図７においても同様）。   The wing assembly 22 includes a plurality of main wings 221 arranged along the outer periphery of the impeller portion 2 while being spaced from the outer surface 321b of the cup portion 321 (the outer cup portion 3213), and the outer surface 321b of the cup portion 321. And a plurality of auxiliary wings 222 arranged between the cup portion 321 and the plurality of main wings 221. In FIG. 2, the tip of the main wing 221 is hidden except for a part, but each of the plurality of main wings 221 is a forward wing inclined toward the rotation direction 51 of the impeller 2 while moving outward. The plurality of main wings 221 are connected by an annular plate 23 having a lower end on the base portion 112 side perpendicular to the central axis J1 and centering on the central axis J1, and an upper end connected by an annular connecting portion 24. Molded. In FIG. 2, a part of the connecting portion 24 is deleted to show the shape of the main wing 221 (the same applies to FIGS. 4 to 7).

複数の補助翼２２２のそれぞれは、図２に示すように外側へと向かいつつインペラ部２の回転方向５１とは反対側に傾く後進翼となっており、カップ部３２１の外側カップ部３２１３の外側面３２１ｂに接続されるとともに、補助翼２２２の最も外側の部位は環状板２３の内側の部位と接続される。また、補助翼２２２は、図１および図２に示すように、ベース部１１２側にて２枚の主翼２２１毎に１枚の主翼２２１と直接接続され、複数の補助翼２２２のそれぞれが複数の主翼２２１のいずれかと連続している。これにより、主翼２２１と補助翼２２２との間の部位がリブとして機能し、さらに補助翼２２２自体もリブとして機能し、インペラ部２の剛性が向上される。   As shown in FIG. 2, each of the plurality of auxiliary wings 222 is a reverse wing that faces outward and is inclined to the opposite side to the rotation direction 51 of the impeller portion 2, and is outside the outer cup portion 3213 of the cup portion 321. While being connected to the side surface 321 b, the outermost part of the auxiliary wing 222 is connected to the inner part of the annular plate 23. As shown in FIGS. 1 and 2, the auxiliary wings 222 are directly connected to one main wing 221 every two main wings 221 on the base portion 112 side, and each of the plurality of auxiliary wings 222 includes a plurality of auxiliary wings 222. It is continuous with one of the main wings 221. Thereby, the site | part between the main wing | blade 221 and the auxiliary wings 222 functions as a rib, and also the auxiliary wings 222 themselves function as a rib, and the rigidity of the impeller part 2 is improved.

特に、インペラ部２が樹脂により成形される場合には、ベース部１１２側にて環状板２３を用いつつ主翼２２１と補助翼２２２とを接続することにより、インペラ部２の成形（樹脂注入や金型からの取り出し等）を容易とすることができる。もちろん、インペラ部２の剛性や成形に問題が生じないのであれば、主翼２２１と補助翼２２２とを分離して環状板２３を介して複数の補助翼２２２が複数の主翼２２１と間接的に接続されてもよい。また、補助翼２２２は、インサート成形等によりヨーク部材３２１２（図１参照）の外側面に接続されてもよい。   In particular, when the impeller portion 2 is molded from resin, the main wing 221 and the auxiliary wing 222 are connected to each other while using the annular plate 23 on the base portion 112 side to form the impeller portion 2 (resin injection or gold And the like can be easily removed from the mold. Of course, if there is no problem in the rigidity and molding of the impeller portion 2, the main wing 221 and the auxiliary wing 222 are separated and the plurality of auxiliary wings 222 are indirectly connected to the plurality of main wings 221 via the annular plate 23. May be. The auxiliary blade 222 may be connected to the outer surface of the yoke member 3212 (see FIG. 1) by insert molding or the like.

ところで、翼集合体２２では、補助翼２２２から主翼２２１へエアを円滑に流れ込ませるという観点からは、主翼２２１と補助翼２２２とが連続していることが好ましい。その一方で、カップ部３２１と主翼２２１との間には障害物が存在しない方が主翼２２１へのエアの流入効率を向上することができる。そこで、遠心ファン１では主翼２２１と補助翼２２２とを連続させるとともに主翼２２１と補助翼２２２との間（すなわち、境界）におけるインペラ部２の中心軸Ｊ１方向の幅が小さくなるように設計されており、これにより、補助翼２２２による乱流抑制効果を得つつ主翼２２１にて発生する気流による遠心ファン１の特性（例えば、静圧−風量特性）に補助翼２２２が与える影響を低減することができる。具体的な好ましい設計条件としては、複数の主翼２２１と複数の補助翼２２２との間におけるインペラ部２の中心軸Ｊ１方向の幅（図１中に符号Ｗを付す。）は、複数の主翼２２１の中心軸Ｊ１方向の長さ（符号Ｌを付す。）の１／３以下とされる。また、カップ部３２１の外側面を流れるエアにより外側面の下部近傍にて乱流域が広くなることから、遠心ファン１では図１に示すように、補助翼２２２のベース部１１２とは反対側のエッジ２２２２は、カップ部３２１の外側面３２１ｂから外側へと伸びつつベース部１１２に向かって傾斜しており、中心軸Ｊ１方向に関する補助翼２２２の幅が、インペラ部２の外周側からカップ部３２１に向かって漸次大きくされる。その結果、ファン特性を低下させることなく効率よく乱流の発生が抑制される。   By the way, in the blade assembly 22, it is preferable that the main wing 221 and the auxiliary wing 222 are continuous from the viewpoint of smoothly flowing air from the auxiliary wing 222 to the main wing 221. On the other hand, the air inflow efficiency into the main wing 221 can be improved when there is no obstacle between the cup portion 321 and the main wing 221. Therefore, the centrifugal fan 1 is designed such that the main wing 221 and the auxiliary wing 222 are made continuous and the width of the impeller portion 2 in the direction of the central axis J1 between the main wing 221 and the auxiliary wing 222 is small. Thus, it is possible to reduce the influence of the auxiliary blades 222 on the characteristics (for example, static pressure-air volume characteristics) of the centrifugal fan 1 due to the airflow generated in the main blades 221 while obtaining the turbulent flow suppressing effect of the auxiliary blades 222. it can. As a specific preferable design condition, the width in the direction of the central axis J1 of the impeller portion 2 between the plurality of main wings 221 and the plurality of auxiliary wings 222 (indicated by a symbol W in FIG. 1) is the plurality of main wings 221. 1/3 or less of the length in the direction of the central axis J1 (labeled L). Further, since the turbulent flow area is widened near the lower portion of the outer surface by the air flowing on the outer surface of the cup portion 321, in the centrifugal fan 1, as shown in FIG. The edge 2222 is inclined toward the base portion 112 while extending outward from the outer surface 321b of the cup portion 321, and the width of the auxiliary wing 222 in the direction of the central axis J1 is such that the cup portion 321 extends from the outer peripheral side of the impeller portion 2. It is gradually increased toward. As a result, generation of turbulent flow is efficiently suppressed without deteriorating fan characteristics.

なお、主翼２２１と補助翼２２２との間におけるインペラ部２の中心軸Ｊ１方向の幅とは、主翼２２１と補助翼２２２とが直接接続される場合は、１つの主翼２２１と１つの補助翼２２２との間の上下方向の最小幅であり（すなわち、複数の主翼２２１と複数の補助翼２２２との間の中心軸Ｊ１を中心とする環状の略凹状の領域に限定して注目した場合は、この環状領域におけるリブ状の部位の上下方向の幅となる。）、主翼２２１と補助翼２２２とが環状板２３を介して間接的に接続される場合は、環状板２３の厚さとなる。   The width of the impeller portion 2 between the main wing 221 and the auxiliary wing 222 in the direction of the central axis J1 is one main wing 221 and one auxiliary wing 222 when the main wing 221 and the auxiliary wing 222 are directly connected. (That is, when attention is limited to an annular substantially concave region centered on the central axis J1 between the plurality of main wings 221 and the plurality of auxiliary wings 222, This is the vertical width of the rib-like portion in the annular region.) When the main wing 221 and the auxiliary wing 222 are indirectly connected via the annular plate 23, the thickness of the annular plate 23 is obtained.

インペラ部２ではさらに、図１ないし図３に示すように、複数の補助翼２２２の間において中心軸Ｊ１方向に関して貫通する複数の開口２５が設けられる。図１に示すように、複数の開口２５のベース部１１２側の開口端は複数の補助翼２２２のベース部１１２側のエッジ２２２１を含み、開口端の複数の主翼２２１側の部位２５１（すなわち、環状板２３の内側の部位）が中心軸Ｊ１側の部位２５２（すなわち、カップ部３２１の開口部３２１１側の部位）よりもベース部１１２に近くされる。これにより、開口端が電機子３１５と回路基板３１６との間の隙間に向かって傾斜する。なお、開口端を傾斜させるために、補助翼２２２のベース部１１２側のエッジ２２２１は、カップ部３２１の開口部３２１１から外側へと伸びつつベース部１１２に向かって傾斜している。   Further, as shown in FIGS. 1 to 3, the impeller portion 2 is provided with a plurality of openings 25 penetrating in the direction of the central axis J <b> 1 between the plurality of auxiliary blades 222. As shown in FIG. 1, the opening ends on the base portion 112 side of the plurality of openings 25 include the edges 2221 on the base portion 112 side of the plurality of auxiliary wings 222, and the portions 251 on the plurality of main wings 221 side of the opening ends (that is, A portion on the inner side of the annular plate 23) is closer to the base portion 112 than a portion 252 on the central axis J1 side (that is, a portion on the opening 3211 side of the cup portion 321). As a result, the open end is inclined toward the gap between the armature 315 and the circuit board 316. In order to incline the opening end, the edge 2221 of the auxiliary wing 222 on the base portion 112 side is inclined toward the base portion 112 while extending outward from the opening portion 3211 of the cup portion 321.

以上、遠心ファン１の構造について説明したが、遠心ファン１では、カップ部３２１の外側面３２１ｂと主翼２２１との間において、外側面３２１ｂに接続されるとともにベース部１１２側にて主翼２２１と直接接続される複数の補助翼が設けられるため（環状板２３を介して間接的に接続されてもよい。）、カップ部３２１の外側面３２１ｂの近くを流れるエアは補助翼２２２によって掻き込まれるため、エアが淀まず滑らかに主翼２２１へと導くことができる。その結果、カップ部３２１の外側面３２１ｂ近傍での乱流の発生を抑制でき、主翼２２１へ円滑にエアが流れ、遠心ファン１の低騒音化を図ることができる。   While the structure of the centrifugal fan 1 has been described above, the centrifugal fan 1 is connected to the outer surface 321b between the outer surface 321b of the cup portion 321 and the main wing 221 and directly connected to the main wing 221 on the base portion 112 side. Since a plurality of auxiliary wings to be connected are provided (may be indirectly connected via the annular plate 23), the air flowing near the outer surface 321b of the cup portion 321 is swept by the auxiliary wings 222. The air can be smoothly and smoothly guided to the main wing 221. As a result, the occurrence of turbulent flow in the vicinity of the outer surface 321b of the cup portion 321 can be suppressed, air can smoothly flow to the main wing 221 and the noise of the centrifugal fan 1 can be reduced.

また、遠心ファン１では、電機子３１５の少なくとも一部がカップ部３２１内に位置するためモータ３が回転するときに電機子３１５で発生する熱がこもり易くなるが、隣接する２つの補助翼２２２の間に中心軸Ｊ１方向に関して貫通する開口２５が設けられるため、カップ部３２１の外側面３２１ｂに沿って流れるエアの一部がカップ部３２１の内部にも流れ込み（カップ部３２１からエアが流れ出す領域もおよそ排気口１３側に生じる。）、加えて、補助翼２２２により開口２５近傍にて気流が発生することにより、効率よくエアをカップ部３２１内に送ることができ、これにより、電機子３１５にエアを供給して電機子３１５の温度上昇を抑えることができる。設計条件にもよるが、開口２５を設けないインペラ部では電機子３１５の温度が約１１５℃となる場合に、開口２５を設けることにより、約４７℃まで低下することが確認されている。   Further, in the centrifugal fan 1, since at least a part of the armature 315 is located in the cup portion 321, heat generated in the armature 315 is easily trapped when the motor 3 rotates. Since an opening 25 penetrating in the direction of the central axis J1 is provided between the two, a part of the air flowing along the outer side surface 321b of the cup part 321 also flows into the cup part 321 (a region where air flows out from the cup part 321) In addition, the air flow is generated in the vicinity of the opening 25 by the auxiliary blade 222, so that the air can be efficiently sent into the cup portion 321. Air can be supplied to the armature 315 to suppress the temperature rise. Although depending on the design conditions, it has been confirmed that in the impeller portion where the opening 25 is not provided, when the temperature of the armature 315 is about 115 ° C., the opening 25 is reduced to about 47 ° C.

さらに、複数の開口２５のベース部１１２側の開口端が電機子３１５や回路基板３１６に向かって（特に、電機子３１５と回路基板３１６との間の隙間に向かって）傾斜することにより、電機子３１５に向かって流れるエアの供給効率を向上することができ、かつ、回路基板３１６の冷却も行うことができる。   Further, the opening ends on the base portion 112 side of the plurality of openings 25 are inclined toward the armature 315 and the circuit board 316 (particularly, toward the gap between the armature 315 and the circuit board 316), so that the electric machine The supply efficiency of the air flowing toward the child 315 can be improved, and the circuit board 316 can be cooled.

次に、インペラ部２の主翼２２１および補助翼２２２の他の様々な形状について説明する。図４ないし図９は、インペラ部の他の例を示す図である。図２に示すインペラ部２では、各補助翼２２２が後進翼とされるが、補助翼の形状は後進翼に限定されるものではなく、例えば、図４に示すインペラ部２ａでは、各補助翼２２２ａが前進翼とされ、図５に示すインペラ部２ｂの各補助翼２２２ｂはカップ部３２１から径方向へと直線状に伸びる径方向翼とされる。インペラ部２ａおよびインペラ部２ｂの主翼２２１は、インペラ部２と同様に前進翼とされる。   Next, various other shapes of the main wing 221 and the auxiliary wing 222 of the impeller portion 2 will be described. 4 to 9 are diagrams showing other examples of the impeller portion. In the impeller portion 2 shown in FIG. 2, each auxiliary wing 222 is a reverse wing, but the shape of the auxiliary wing is not limited to the reverse wing. For example, in the impeller portion 2a shown in FIG. 222a is a forward wing, and each auxiliary wing 222b of the impeller portion 2b shown in FIG. 5 is a radial wing extending linearly from the cup portion 321 in the radial direction. The main wings 221 of the impeller portion 2a and the impeller portion 2b are forward wings, similar to the impeller portion 2.

インペラ部２，２ａ，２ｂ、および、主翼２２１のみのインペラ部（図示省略）の騒音値の比較実験を行ったところ、それぞれ５４．１ｄＢ（Ａ）、５５．２ｄＢ（Ａ）、５４．８ｄＢ（Ａ）、および、５５．８ｄＢ（Ａ）となった。このことから、ファンの静圧を高めるために主翼２２１を前進翼とする場合は、補助翼２２２を後進翼とすることにより騒音値を最も低減することができることが分かる。なお、補助翼が後進翼でない場合であっても補助翼を設けることにより騒音が低減されるといえる。   When a comparative experiment of the noise values of the impeller portions 2, 2a, 2b and the impeller portion (not shown) of only the main wing 221 was performed, 54.1 dB (A), 55.2 dB (A), 54.8 dB ( A) and 55.8 dB (A). From this, it can be seen that when the main wing 221 is a forward blade in order to increase the static pressure of the fan, the noise value can be most reduced by using the auxiliary wing 222 as a backward blade. Even if the auxiliary wing is not a reverse wing, it can be said that noise is reduced by providing the auxiliary wing.

一方、主翼についても、図２のインペラ部２のように前進翼に限定されるものではなく、例えば、図６に示すインペラ部２ｃのように径方向翼である主翼２２１ａとされてもよく、図７に示すインペラ部２ｄのように後進翼である主翼２２１ｂとされてもよい。   On the other hand, the main wing is not limited to the forward wing as in the impeller portion 2 of FIG. 2, and may be, for example, a main wing 221a that is a radial wing like the impeller portion 2c shown in FIG. A main wing 221b that is a reverse wing may be used as in the impeller portion 2d shown in FIG.

また、インペラ部２の翼集合体２２では、３枚以上の主翼２２１毎に１つの主翼２２１と１つの補助翼２２２とが接続されてもよく、図８に示すインペラ部２ｅのように、全ての主翼２２１に補助翼２２２が連続して形成されてもよい。また、補助翼の形状は平板状には限定されず、図９に示すように、インペラ部２ｆを上側から見たときに、各補助翼２２２ｃがカップ部３２１からインペラ部２ｆの外周側へと伸びつつ湾曲してもよい。   Further, in the blade assembly 22 of the impeller portion 2, one main wing 221 and one auxiliary wing 222 may be connected for every three or more main wings 221, and as in the impeller portion 2e shown in FIG. The auxiliary wings 222 may be continuously formed on the main wings 221. Further, the shape of the auxiliary wings is not limited to a flat plate shape, and as shown in FIG. 9, when the impeller portion 2 f is viewed from the upper side, each auxiliary wing 222 c moves from the cup portion 321 to the outer peripheral side of the impeller portion 2 f. It may be curved while stretched.

さらに、補助翼２２２とカップ部３２１との接続範囲は、図１に示すように、中心軸Ｊ１方向に関してカップ部３２１の外側面３２１ｂの途中から下端までの範囲だけでなく、図１０に示すようにカップ部３２１の上端から下端までの範囲、図１１に示すように中心軸Ｊ１方向に関して外側面３２１ｂの途中から途中までの範囲、図１２に示すようにカップ部３２１の上端から下端より下までの範囲とされてもよい。また、補助翼２２２の下側および上側のエッジ２２２１，２２２２についても図１３に示すように湾曲してもよく、図１４および図１５に示すように上側のエッジ２２２２と中心軸Ｊ１に平行なエッジ２２２３とが連続していてもよい。   Further, as shown in FIG. 1, the connection range between the auxiliary wing 222 and the cup portion 321 is not only the range from the middle to the lower end of the outer surface 321b of the cup portion 321 in the direction of the central axis J1, but also as shown in FIG. The range from the upper end to the lower end of the cup portion 321, as shown in FIG. 11, the range from the middle to the middle of the outer surface 321 b in the direction of the central axis J <b> 1, from the upper end to the lower end of the cup portion 321 as shown in FIG. 12. It may be made the range. Further, the lower and upper edges 2221, 2222 of the auxiliary wing 222 may be curved as shown in FIG. 13, and the edges parallel to the upper edge 2222 and the central axis J1 as shown in FIGS. 2223 may be continuous.

以上のように、翼の形状、数、および、大きさは様々に変更されてよく、遠心ファン１が搭載される機器や、必要とされる風量特性等に基づいて主翼２２１および補助翼２２２の形状等が決定される。いずれの主翼２２１および補助翼２２２の場合においてもカップ部３２１の外側面３２１ｂ付近の乱流の発生を抑制して騒音を低減することができる。   As described above, the shape, number, and size of the blades may be variously changed, and the main wing 221 and the auxiliary wing 222 may be changed based on the equipment on which the centrifugal fan 1 is mounted, the required airflow characteristics, and the like. The shape and the like are determined. In any of the main wings 221 and the auxiliary wings 222, generation of turbulent flow in the vicinity of the outer surface 321b of the cup portion 321 can be suppressed to reduce noise.

以上、本発明の実施の形態について説明してきたが、本発明は上記実施の形態に限定されるものではなく、様々な変更が可能である。   As mentioned above, although embodiment of this invention has been described, this invention is not limited to the said embodiment, A various change is possible.

例えば、補助翼２２２の上側のエッジ２２２２の形状は、図１６に示すように途中に段差が設けられる形状であってもよい。また、図１７に示すように、複数の補助翼２２２ｄのエッジ２２２１がカップ部３２１の開口部３２１１から外側へ水平に伸びて複数の補助翼２２２ｄの形状が略三角形とされ、複数の補助翼２２２ｄの最も外側の部位が環状板２３の内側の部位のみと接続されてもよい。この場合にもカップ部３２１の外側面３２１ｂにおける乱流の発生を抑制して低騒音化を図ることができ、隣接する２つの補助翼２２２ｄの間に開口２５が設けられ、補助翼２２２ｄおよび開口２５の作用によりカップ部３２１の内部にエアが供給されることにより電機子３１５の温度上昇を抑えることができる。   For example, the shape of the upper edge 2222 of the auxiliary wing 222 may be a shape in which a step is provided in the middle as shown in FIG. Further, as shown in FIG. 17, the edges 2221 of the plurality of auxiliary wings 222d extend horizontally from the opening 3211 of the cup portion 321 to the outside, so that the shapes of the plurality of auxiliary wings 222d are substantially triangular, and the plurality of auxiliary wings 222d The outermost part may be connected only to the inner part of the annular plate 23. Also in this case, generation of turbulent flow on the outer side surface 321b of the cup portion 321 can be suppressed to reduce noise, and an opening 25 is provided between two adjacent auxiliary blades 222d. By supplying air into the cup part 321 by the action of 25, the temperature rise of the armature 315 can be suppressed.

上記実施の形態では電機子３１５のほぼ全体がカップ部３２１内に収納されるが、ベース部１１２の中心軸Ｊ１の周りに形成された凹部に電機子３１５が配置される場合は、電機子３１５の一部だけがカップ部３２１内に位置してもよい。また、軸受機構も玉軸受以外にスリーブ軸受等が用いられてもよい。   In the embodiment described above, almost the entire armature 315 is accommodated in the cup portion 321. However, when the armature 315 is disposed in a recess formed around the central axis J1 of the base portion 112, the armature 315 is disposed. May be located in the cup portion 321. In addition to the ball bearing, a sleeve bearing or the like may be used as the bearing mechanism.

環状板２３は中心軸Ｊ１に垂直な板である必要はなく、例えば、円錐台状の傾斜面のように、中心軸Ｊ１を含む面による断面が中心軸Ｊ１に垂直な方向から傾斜していてもよい。また、上記実施の形態では開口２５から電機子３１５へとエアが供給されるが、電機子３１５の温度上昇が許容範囲に収まるなどの理由で開口２５を設ける必要がない場合は、開口２５は設けられなくてもよい。   The annular plate 23 does not need to be a plate perpendicular to the central axis J1, and for example, a cross section by a plane including the central axis J1 is inclined from a direction perpendicular to the central axis J1, such as a truncated cone-shaped inclined surface. Also good. In the above embodiment, air is supplied from the opening 25 to the armature 315. However, if the opening 25 does not need to be provided because the temperature rise of the armature 315 is within an allowable range, the opening 25 is It may not be provided.

本発明の一の実施の形態に係る遠心ファンの構成を示す断面図である。It is sectional drawing which shows the structure of the centrifugal fan which concerns on one embodiment of this invention. 遠心ファンを示す平面図である。It is a top view which shows a centrifugal fan. インペラ部を示す斜視図である。It is a perspective view which shows an impeller part. インペラ部の他の例を示す平面図である。It is a top view which shows the other example of an impeller part. インペラ部の他の例を示す平面図である。It is a top view which shows the other example of an impeller part. インペラ部の他の例を示す断面図である。It is sectional drawing which shows the other example of an impeller part. インペラ部の他の例を示す断面図である。It is sectional drawing which shows the other example of an impeller part. インペラ部の他の例を示す平面図である。It is a top view which shows the other example of an impeller part. インペラ部の他の例を示す平面図である。It is a top view which shows the other example of an impeller part. 補助翼の他の例を示す断面図である。It is sectional drawing which shows the other example of an auxiliary wing. 補助翼の他の例を示す断面図である。It is sectional drawing which shows the other example of an auxiliary wing. 補助翼の他の例を示す断面図である。It is sectional drawing which shows the other example of an auxiliary wing. 補助翼の他の例を示す断面図である。It is sectional drawing which shows the other example of an auxiliary wing. 補助翼の他の例を示す断面図である。It is sectional drawing which shows the other example of an auxiliary wing. 補助翼の他の例を示す断面図である。It is sectional drawing which shows the other example of an auxiliary wing. 補助翼の他の例を示す断面図である。It is sectional drawing which shows the other example of an auxiliary wing. 補助翼の他の例を示す断面図である。It is sectional drawing which shows the other example of an auxiliary wing.

符号の説明Explanation of symbols

１ 遠心ファン
２，２ａ，２ｂ，２ｃ，２ｄ，２ｅ，２ｆ インペラ部
１０ ハウジング
１２ 吸気口
１３ 排気口
２２ 翼集合体
２３ 環状板
２５ 開口
５１ 回転方向
１１１ カバー部
１１２ ベース部
１１３ 側壁部
２２１，２２１ａ，２２１ｂ 主翼
２２２，２２２ａ，２２２ｂ，２２２ｃ，２２２ｄ 補助翼
３１２，３１３ 玉軸受
３１５ 電機子
３２１ カップ部
３２１ａ ヨーク部
３２１ｂ 外側面
３２２ 界磁用磁石
２２２１，２２２２ エッジ
３２１１ 開口部
Ｊ１ 中心軸 DESCRIPTION OF SYMBOLS 1 Centrifugal fan 2,2a, 2b, 2c, 2d, 2e, 2f Impeller part 10 Housing 12 Intake port 13 Exhaust port 22 Blade assembly 23 Annular plate 25 Opening 51 Rotation direction 111 Cover part 112 Base part 113 Side wall part 221,221a , 221b Main wings 222, 222a, 222b, 222c, 222d Auxiliary wings 312 and 313 Ball bearings 315 Armature 321 Cup part 321a Yoke part 321b Outer side face 322 Field magnet 2221, 2222 Edge 3211 Opening part J1 Central axis

Claims (5)

遠心ファンであって、
所定の中心軸を中心とする円筒状のヨーク部を有する略有底円筒状のカップ部と、
前記カップ部の内側面に固定された界磁用磁石と、
前記カップ部に接続されて前記カップ部の外側の環状の領域に放射状に配置された翼集合体を有し、前記カップ部と共に回転することにより前記カップ部の底部側からエアを取り込んで前記中心軸から離れる方向に前記エアを排出するインペラ部と、
前記インペラ部の外周を覆う側壁部、前記カップ部の開口部側を覆うベース部、および、前記カップ部の前記底部に対向する吸気口が形成されたカバー部を有し、前記側壁部と前記インペラ部との間の流路の幅が排気口に向かって漸次広がるハウジングと、
前記中心軸を中心に前記カップ部を前記ベース部に対して回転可能に支持する軸受機構と、
前記ベース部に固定されて少なくとも一部が前記カップ部内に位置し、前記界磁用磁石との間で前記中心軸を中心とするトルクを発生する電機子と、
を備え、
前記翼集合体が、
前記インペラ部の外周に沿って配列された複数の主翼と、
前記カップ部の外側面と前記複数の主翼との間において、前記カップ部の前記外側面に接続されるとともに前記ベース部側にて前記複数の主翼と直接または間接的に接続される複数の補助翼と、
を備え、
前記複数の補助翼の前記ベース部とは反対側のエッジが外側へと伸びつつ前記ベース部に向かって傾斜しており、前記複数の主翼と前記複数の補助翼との間における前記インペラ部の前記中心軸方向の幅が前記複数の主翼の前記中心軸方向の長さの１／３以下であることを特徴とする遠心ファン。 A centrifugal fan,
A substantially bottomed cylindrical cup portion having a cylindrical yoke portion centered on a predetermined central axis;
A field magnet fixed to the inner surface of the cup part;
The wing assembly is connected to the cup portion and radially arranged in an annular region outside the cup portion, and the center is formed by taking air from the bottom side of the cup portion by rotating together with the cup portion. An impeller for discharging the air in a direction away from the shaft;
A side wall portion covering the outer periphery of the impeller portion, a base portion covering the opening side of the cup portion, and a cover portion formed with an air inlet that faces the bottom portion of the cup portion; A housing in which the width of the flow path between the impeller portion gradually widens toward the exhaust port,
A bearing mechanism that rotatably supports the cup portion with respect to the base portion around the central axis;
An armature that is fixed to the base portion and at least a portion thereof is located in the cup portion and generates torque centered on the central axis with the field magnet;
With
The wing assembly is
A plurality of main wings arranged along the outer periphery of the impeller portion;
Between the outer surface of the cup portion and the plurality of main wings, a plurality of auxiliary members connected to the outer surface of the cup portion and connected directly or indirectly to the plurality of main wings on the base portion side With wings,
With
Edges of the plurality of auxiliary wings opposite to the base portion extend outward and are inclined toward the base portion, and the impeller portion between the plurality of main wings and the plurality of auxiliary wings The centrifugal fan, wherein a width in the central axis direction is 1/3 or less of a length in the central axis direction of the plurality of main wings. 請求項１に記載の遠心ファンであって、
前記インペラ部が、前記複数の補助翼の間において前記中心軸方向に関して貫通する複数の開口を有することを特徴とする遠心ファン。 The centrifugal fan according to claim 1,
The centrifugal fan, wherein the impeller portion has a plurality of openings penetrating in the direction of the central axis between the plurality of auxiliary blades. 請求項２に記載の遠心ファンであって、
前記複数の補助翼の前記ベース部側のエッジが、前記カップ部の前記開口部から外側へと伸びつつ前記ベース部に向かって傾斜しており、前記複数の開口の前記ベース部側の開口端が前記エッジを含み、前記開口端の前記複数の主翼側の部位が前記中心軸側の部位よりも前記ベース部に近いことを特徴とする遠心ファン。 The centrifugal fan according to claim 2,
Edges on the base part side of the plurality of auxiliary wings are inclined toward the base part while extending outward from the opening part of the cup part, and opening ends on the base part side of the plurality of openings The centrifugal fan including the edge, wherein the plurality of main wing side portions of the open end are closer to the base portion than the central axis side portion. 請求項１ないし３のいずれかに記載の遠心ファンであって、The centrifugal fan according to any one of claims 1 to 3,
前記中心軸を中心とする環状板により前記複数の主翼の前記ベース部側の端部が連結されており、前記複数の補助翼の最も外側の部位が前記環状板の内側の部位と接続されることを特徴とする遠心ファン。End portions on the base portion side of the plurality of main wings are connected by an annular plate centering on the central axis, and the outermost portion of the plurality of auxiliary wings is connected to the inner portion of the annular plate. A centrifugal fan characterized by that. 請求項１ないし４のいずれかに記載の遠心ファンであって、The centrifugal fan according to any one of claims 1 to 4,
前記複数の補助翼のそれぞれが、前記複数の主翼のいずれかと連続していることを特徴とする遠心ファン。Each of the plurality of auxiliary wings is continuous with any one of the plurality of main wings.
JP2005312448A 2005-10-27 2005-10-27 Centrifugal fan Expired - Fee Related JP4935048B2 (en)

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