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JP2005307985A - Electric blower for vacuum cleaner and vacuum cleaner using same - Google Patents

Electric blower for vacuum cleaner and vacuum cleaner using same Download PDF

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Publication number
JP2005307985A
JP2005307985A JP2005177255A JP2005177255A JP2005307985A JP 2005307985 A JP2005307985 A JP 2005307985A JP 2005177255 A JP2005177255 A JP 2005177255A JP 2005177255 A JP2005177255 A JP 2005177255A JP 2005307985 A JP2005307985 A JP 2005307985A
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Japan
Prior art keywords
impeller
vacuum cleaner
electric blower
air guide
blade
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JP2005177255A
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Japanese (ja)
Inventor
Toru Hirose
徹 広瀬
Hiroyuki Kayama
博之 香山
Tomoyuki Kikukawa
智之 菊川
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Priority to JP2005177255A priority Critical patent/JP2005307985A/en
Publication of JP2005307985A publication Critical patent/JP2005307985A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a small size light weight efficient electric blower for a vacuum cleaner and obtain a small size efficient vacuum cleaner. <P>SOLUTION: The electric blower for the vacuum cleaner 11 is composed of an impeller including a mixed flow type blade 22 having the outer circumference end of the lower end long side of the blade 22 which is a quadrilateral curved surface inclined in relation to a rotation surface and having a suction air flow flowing in from an inlet of the impeller 14 in an axial direction and flowing along the blade 2 flow out from an outlet at angles between a radial direction and the axial direction, an air guide 16 arranged on the downstream side of the impeller 14 and a electric motor 13 having the impeller 14 fixed on the shaft end and driving and rotating the same. Consequently, the small size light weight efficient electric blower can be provided and the small size efficient vacuum cleaner can be obtained. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、電気掃除機用電動送風機およびこれを用いた電気掃除機に関するものである。   The present invention relates to an electric blower for a vacuum cleaner and a vacuum cleaner using the same.

図１５を用いて従来の電気掃除機用電動送風機の構成を説明する。   The structure of the conventional electric fan for vacuum cleaners is demonstrated using FIG.

図１５において、１はインペラであり、シュラウド前２、シュラウド後３によって挟持された複数枚のブレード４によって構成されている。５はインペラ１の周囲に配置された複数の静翼５ａからなるエアガイドを示す。６は前記インペラ１を回転駆動する電動機であり、回転軸６ａにインペラ１が固着されている。電動機６のブラケット６ｂに前記エアガイド１５が載置されている。７はインペラ１、エアガイド５を内包し、ブラケット６ｂ外周に圧入固定されたファンケースを示す。１ａはインペラへの気流の入口を、７ａはファンケースの吸気口を示す。   In FIG. 15, reference numeral 1 denotes an impeller, which is composed of a plurality of blades 4 sandwiched between a front shroud 2 and a rear shroud 3. Reference numeral 5 denotes an air guide composed of a plurality of stationary blades 5 a arranged around the impeller 1. Reference numeral 6 denotes an electric motor that rotationally drives the impeller 1, and the impeller 1 is fixed to a rotating shaft 6a. The air guide 15 is placed on the bracket 6 b of the electric motor 6. A fan case 7 includes the impeller 1 and the air guide 5 and is press-fitted and fixed to the outer periphery of the bracket 6b. Reference numeral 1a denotes an air flow inlet to the impeller, and 7a denotes an air inlet of the fan case.

次にこの電動送風機の動作について述べる。インペラを電動機で回転駆動すると遠心力によって矢印８に示す気流が生じる。気流は回転軸６ａ方向からファンケースの吸気口７ａ、インペラ１の入口１ａへ流入し、遠心力によってエネルギを与えられブレード４に沿って直角に曲がり、半径方向すなわちインペラ外周側から流出する。インペラ１から出た気流は、エアガイド５により減速され圧力回復しながら電動機６の内部を通過し、電動機６の排気口６ｃより流出する。この電動送風機は掃除機に組み込まれ、電動送風機が発生する吸引力によって吸引集塵を行なっている。   Next, the operation of this electric blower will be described. When the impeller is rotationally driven by an electric motor, an air flow indicated by an arrow 8 is generated by centrifugal force. The airflow flows from the direction of the rotating shaft 6a into the air inlet 7a of the fan case and the inlet 1a of the impeller 1, is energized by centrifugal force, bends at right angles along the blade 4, and flows out from the radial direction, that is, from the outer periphery of the impeller. The airflow coming out of the impeller 1 is decelerated by the air guide 5, passes through the inside of the electric motor 6 while recovering the pressure, and flows out from the exhaust port 6 c of the electric motor 6. This electric blower is incorporated in a vacuum cleaner and performs suction dust collection by the suction force generated by the electric blower.

しかし、上記従来の構成では、インペラの遠心力を利用するため、必要な流量、吸引力を得るには、インペラの入口１ａの径に比べ十分に大きなインペラ外径が必要であり、又インペラ１の外周側にエアガイド５を配置する必要があり、結果として小型が難しい。又インペラ１の内部で気流が直角に曲がるため大流量では損失が大きくなる欠点、課題を有している。   However, in the above-described conventional configuration, since the centrifugal force of the impeller is used, in order to obtain the necessary flow rate and suction force, the outer diameter of the impeller that is sufficiently larger than the diameter of the impeller inlet 1a is required. It is necessary to arrange the air guide 5 on the outer peripheral side of the lens, and as a result it is difficult to reduce the size. Further, since the airflow bends at right angles inside the impeller 1, there is a disadvantage that the loss increases at a large flow rate.

本発明は、上記課題を解決するもので、径方向かつ軸方向に短い小型、軽量でしかも大流量時に効率の良い電気掃除機用の電動送風機を提供することを目的とする。   An object of the present invention is to solve the above-described problems, and to provide an electric blower for a vacuum cleaner that is small in size and light in the radial direction and in the axial direction and that is efficient at a large flow rate.

上記目的を達成するために本発明は、軸方向に流入した気流が半径方向より軸方向に傾斜した方向に流出する斜流型ブレードをインペラに用いることにより、半径方向に小型すなわち軽量でしかも大風量時に効率の良い電気掃除機用電動送風機を実現できる。   In order to achieve the above-mentioned object, the present invention uses a mixed flow type blade in which an airflow flowing in an axial direction flows out in a direction inclined in an axial direction from the radial direction in the impeller, thereby reducing the size in the radial direction. An electric blower for a vacuum cleaner that is efficient at the time of air flow can be realized.

以上のように、請求項１〜８記載の発明によれば、径方向かつ軸方向に小型、軽量でしかも大流量時に効率の良い電気掃除機用の電動送風機を実現することができる。また、小型でかつ効率に優れた電気掃除機を実現することができる。   As described above, according to the first to eighth aspects of the invention, it is possible to realize an electric blower for a vacuum cleaner that is small in size and light in the radial direction and in the axial direction and that is efficient at a large flow rate. Moreover, a small and efficient vacuum cleaner can be realized.

本発明の請求項１に記載の発明は、４辺形の曲面であるブレードの下端側長辺の外周端部が回転面に対し傾斜し、インペラの入口から軸方向に流入しブレードに沿って流れる吸引気流が径方向と軸方向の間の角度で出口から流出する、斜流型ブレードを有したインペラと、インペラの下流側に配置したエアガイドと、軸端に上記インペラを固着し回転駆動する電動機とからなり、前記電動機の軸受けの一部がインペラのハブ内に位置する電気掃除機用電動送風機とすることにより、インペラ、及びエアガイドを径方向に小さくかつ軸方向にも短くでき、また圧損の低減がはかれ小型で、かつ効率に優れた電気掃除機用の電動送風機を実現できる。   According to the first aspect of the present invention, the outer peripheral end of the lower side of the blade, which is a quadrilateral curved surface, is inclined with respect to the rotation surface, flows in the axial direction from the inlet of the impeller, and runs along the blade. An impeller with a mixed flow type blade, in which a flowing suction airflow flows out from the outlet at an angle between the radial direction and the axial direction, an air guide disposed on the downstream side of the impeller, and the impeller is fixed to the shaft end to rotate. An electric blower for a vacuum cleaner in which a part of the bearing of the electric motor is located in the hub of the impeller, the impeller and the air guide can be reduced in the radial direction and in the axial direction, Moreover, the electric blower for a vacuum cleaner which is reduced in pressure loss and is small in size and excellent in efficiency can be realized.

本発明の請求項２に記載の発明は、特に、請求項１に記載のインペラのブレードの入口側短辺がほぼ回転面上にあり、入口端部でブレード面が回転面に対し傾斜した構成とすることにより、軸方向の推進力が更に大きくなり、より小型で高効率化できる。   The invention described in claim 2 of the present invention is particularly configured such that the inlet side short side of the blade of the impeller according to claim 1 is substantially on the rotation surface, and the blade surface is inclined with respect to the rotation surface at the inlet end. As a result, the axial propulsive force is further increased, and the size and efficiency can be further reduced.

本発明の請求項３に記載の発明は、特に、請求項１または２に記載のインペラから流出した気流が、電動機のフレーム内部を通過する構成とすることにより、さらに小型化が図れる。   The invention according to claim 3 of the present invention can be further reduced in size by adopting a configuration in which the airflow flowing out from the impeller according to claim 1 or 2 passes through the inside of the frame of the electric motor.

本発明の請求項４に記載の発明は、特に、請求項１または２に記載のインペラから流出した気流が、電動機のフレーム外部を通過する構成とすることにより、より信頼性の高い電気掃除機用の電動送風機を実現できる。   According to the fourth aspect of the present invention, in particular, the airflow flowing out from the impeller according to the first or second aspect passes through the outside of the frame of the electric motor, whereby a more reliable vacuum cleaner. An electric blower can be realized.

本発明の請求項５に記載の発明は、特に、請求項１〜４のいずれか１項に記載のエアガイドの外径が電動機フレームの外径と同じあるいは小さな構成とすることにより、さらに小型化ができる。   The invention according to claim 5 of the present invention is particularly small by making the outer diameter of the air guide according to any one of claims 1 to 4 the same as or smaller than the outer diameter of the motor frame. Can be made.

本発明の請求項６に記載の発明は、特に、請求項１〜５のいずれか１項に記載のインペラ外径よりエアガイドの外径が小さい構成とすることにより、さらに小型化が図れる。   The invention described in claim 6 of the present invention can be further reduced in size by making the outer diameter of the air guide smaller than the outer diameter of the impeller described in any one of claims 1 to 5.

本発明の請求項７に記載の発明は、特に、請求項１〜６のいずれか１項に記載のファンケースの入口側にエアガイドを有した構成とすることにより、更に高効率化が図れる。   In the invention according to claim 7 of the present invention, in particular, the air guide is provided on the inlet side of the fan case according to any one of claims 1 to 6, so that further improvement in efficiency can be achieved. .

本発明の請求項８記載の発明は、特に、請求項１〜７のいずれか１項に記載の電気掃除機用電動送風機を内蔵し、かつ電源として内蔵された電池を用いるコードレス型とすることにより、小型で高効率なより長寿命で使い勝手の良い電気掃除機を実現できる。   The invention according to claim 8 of the present invention is particularly a cordless type that incorporates the electric blower for a vacuum cleaner according to any one of claims 1 to 7 and uses a battery incorporated as a power source. Thus, it is possible to realize a compact, high-efficiency, longer-life and user-friendly vacuum cleaner.

以下本発明の実施例について、図面を参照しながら説明する。   Embodiments of the present invention will be described below with reference to the drawings.

（実施例１）
図１に、本発明の第一の実施例における電気掃除機用電動送風機の要部断面図を示す。図１において、１１は電動送風機を示し、ファン部１２及び電動機１３により構成されている。ファン部１２は、電動機１３の回転軸１３ａに固着されたインペラ１４、及びインペラ１４の外周側に配置された複数の静翼１５を有し電動機１３のブラケット１３ｂに載置固定されたエアガイド１６とこれらを内包するファンケース１７により構成されている。ファンケース１７は電動機１３のブラケット１３ｂの外周に圧入固定され、インペラ１４の入口孔１４ａと対峙し吸気口１７ａが設けられている。電動機１３のブラケット１３ｂには連通口２０が設けられ、電動機１３のフレーム１３ｃには排気口２１が設置されている。 (Example 1)
In FIG. 1, the principal part sectional drawing of the electric blower for vacuum cleaners in the 1st Example of this invention is shown. In FIG. 1, reference numeral 11 denotes an electric blower, which includes a fan unit 12 and an electric motor 13. The fan unit 12 includes an impeller 14 fixed to the rotating shaft 13 a of the electric motor 13, and a plurality of stationary blades 15 disposed on the outer peripheral side of the impeller 14. The air guide 16 is mounted and fixed on a bracket 13 b of the electric motor 13. And a fan case 17 containing them. The fan case 17 is press-fitted and fixed to the outer periphery of the bracket 13 b of the electric motor 13, and is provided with an intake port 17 a that faces the inlet hole 14 a of the impeller 14. A communication port 20 is provided in the bracket 13 b of the electric motor 13, and an exhaust port 21 is provided in the frame 13 c of the electric motor 13.

インペラ１４は図２、図３で示すように、４辺形の曲面で構成された複数のブレード２２が山形のハブ２３を有した基板２４とシュラウド２５に挟持固定され構成されている。ブレード２２の長辺２７の下端側すなわち下流側２７ａは、図２、図５で示すように外周端部２９が２点鎖線で示した回転面２６に対し角度３０を有し傾斜している。又本実施例ではブレード２２の入口側短辺２９ａがほぼ回転面２６上にあり、ブレード面の入口端部３２が回転面２６に対して角度３１を有し傾斜している。図３、図５はシュラウドを分離した状態、図４はインペラ１４を上面から見た図を示す。   As shown in FIGS. 2 and 3, the impeller 14 is configured such that a plurality of blades 22 each having a quadrilateral curved surface are sandwiched and fixed between a substrate 24 having a mountain-shaped hub 23 and a shroud 25. The lower end side, that is, the downstream side 27a of the long side 27 of the blade 22 is inclined with an angle 30 with respect to the rotation surface 26 indicated by the two-dot chain line, as shown in FIGS. In this embodiment, the inlet side short side 29 a of the blade 22 is substantially on the rotating surface 26, and the inlet end 32 of the blade surface is inclined with an angle 31 with respect to the rotating surface 26. 3 and 5 show a state where the shroud is separated, and FIG. 4 shows the impeller 14 as seen from above.

エアガイド１６は図６で示すように、エアガイド基板１６ｃの外側に放射線状に配置された複数枚の静翼１５を配置し、その外周にエアガイド外筒１６ｄを取り付けることによりなり、各静翼間に空気通路３５を構成している。図６（ｄ）、（ｅ）で示すように静翼１５の先端はインペラからの流出した気流に沿うように傾斜している。   As shown in FIG. 6, the air guide 16 includes a plurality of stationary blades 15 arranged radially on the outside of the air guide substrate 16c, and an air guide outer cylinder 16d attached to the outer periphery thereof. An air passage 35 is formed between the blades. As shown in FIGS. 6D and 6E, the tip of the stationary blade 15 is inclined so as to follow the airflow flowing out from the impeller.

電動機１３は回転軸１３ａに固着した回転子３６と、フレーム１３ｃの内周に固定され、内側に回転子３６を空隙３８を隔てて配置する円筒形の固定子３７により構成されている。回転子３６は両側の軸受け３９を介して、フレーム１３ｃのハウジング部４０、及びフレームに固定される傘型をしたブラケット１３ｂのハウジング部４０ａに回転支持されている。本例では固定子３７が圧入固定されるフレーム１３ｃの外径とファンケース１７が圧入固定されるブラケット１３ｂの外径はほぼ等しくなっており、又電動機１３は回転子３６に永久磁石（図示せず）を配したＤＣブラシレス電動機の形態を有している。   The electric motor 13 includes a rotor 36 fixed to the rotary shaft 13a and a cylindrical stator 37 that is fixed to the inner periphery of the frame 13c and that has the rotor 36 disposed inside with a gap 38 therebetween. The rotor 36 is rotatably supported by the housing part 40 of the frame 13c and the housing part 40a of the umbrella-shaped bracket 13b fixed to the frame via bearings 39 on both sides. In this example, the outer diameter of the frame 13c to which the stator 37 is press-fitted and fixed is substantially equal to the outer diameter of the bracket 13b to which the fan case 17 is press-fitted and fixed, and the motor 13 has a permanent magnet (not shown) on the rotor 36. A DC brushless electric motor with a

前記エアガイド１６はブラケット１３ｂに載置固定されている。ブラケット１３ｂには図１、７で示すような連通口２０が設けられている。エアガイド１６の入口はインペラ１４の出口１４ｂと対峙し、エアガイド出口１６ｂはブラケット１３ｂの連通口２０に開口し、電動機のフレーム１３ｃと固定子３７の間の電動機内部通路３４に連通し、排気口２１へつながっている。エアガイド１６の出口１６ｂの径はフレーム１３ｃの内径とほぼ同一であり、エアガイド１６の外径はフレーム１３ｃ外径、ブラケット１３ｂ外径にほぼ等しい。そしてフレーム１３ｃ外径とほぼ等しい内径を有したファンケース１７内にエアガイド１６を収め、ブラケット１３ｂの外周にファンケース１７を圧入固定することができる。   The air guide 16 is mounted and fixed to the bracket 13b. The bracket 13b is provided with a communication port 20 as shown in FIGS. The inlet of the air guide 16 faces the outlet 14b of the impeller 14, and the air guide outlet 16b opens to the communication port 20 of the bracket 13b, communicates with the motor internal passage 34 between the motor frame 13c and the stator 37, and exhausts. Connected to mouth 21. The diameter of the outlet 16b of the air guide 16 is substantially the same as the inner diameter of the frame 13c, and the outer diameter of the air guide 16 is substantially equal to the outer diameter of the frame 13c and the bracket 13b. The air guide 16 can be housed in a fan case 17 having an inner diameter substantially equal to the outer diameter of the frame 13c, and the fan case 17 can be press-fitted and fixed to the outer periphery of the bracket 13b.

図７は電動機１３の部分を示す図であり、図７（ａ）にブラケット側の側面図、図７（ｃ）にフレーム側の側面図を示す。２１はフレーム１３ｃに設置された排気口を示す。ブラケット１３ｂとフレーム１３ｃは３本の通しボルト４２で固定されている。図１で示すようにインペラ１４は回転軸１３ａの先端に圧入固定されている。ブラケット１３ｂ側のハウジング４０ａはインペラ１４の基板２４の底部に設けた凹部４３に入り込んでいる。すなわち、軸受け３９の一部がハブ２３内に位置している。   FIG. 7 is a view showing a portion of the electric motor 13. FIG. 7A shows a side view on the bracket side, and FIG. 7C shows a side view on the frame side. Reference numeral 21 denotes an exhaust port installed in the frame 13c. The bracket 13b and the frame 13c are fixed by three through bolts 42. As shown in FIG. 1, the impeller 14 is press-fitted and fixed to the tip of the rotating shaft 13a. The housing 40a on the bracket 13b side enters a recess 43 provided at the bottom of the substrate 24 of the impeller 14. That is, a part of the bearing 39 is located in the hub 23.

次に動作について述べる。電動機１３を駆動しインペラ１４を回転させると、本実施例の３次元的な曲面を有したブレード２２は空気に遠心力と軸方向の推進力を同時に与え、結果として気流は矢印４５のように流れ、インペラ１４の出口１４ｂでは回転面２６に対し斜めに流れる。出口１４ｂから出た気流はエアガイド１６に入り、静翼１５で囲まれた空気通路３５で圧力回復される。エアガイド１６からでた気流は電動機１３のブラケット１３ｂに設けられた連通口２０から電動機の内部に入り、通過してフレーム１３ｃの排気口２１から流出する。このように本実施例の電動送風機は、吸気口１７ａから吸引された気流が、従来の遠心送風機のように径方向に大きく曲がることが無く、ほぼ軸方向に流れるためエアガイド１６の空気通路３５、電動機内の流路を含め全体の空気の流れが軸方向に一様に配置できるため径方向にコンパクトな構成が可能になる。すなわちエアガイド１６外径とインペラ外径の比は即ち、インペラ１４の外径をエアガイド１６外径で除した値は従来の遠心型送風機に比べ大きく、又本実施例のような斜流型のインペラは遠心力の負荷の他に推進力の負荷も加わるため、インペラ１４の外径に対するトルク即ち出力も大きくなる。これらの理由により、エアガイド１６の外径をフレーム１３ｃの外径よりも小さくすることができ、圧入固定されるファンケース１７の厚みを無視すれば、フレーム１３ｃの外径がほぼ最大径の電動送風機１１を得ることができる。又大風量時での通路損失が低減されるため、電気掃除機に組み込んだ際の効率が良くなる。   Next, the operation will be described. When the motor 13 is driven and the impeller 14 is rotated, the blade 22 having a three-dimensional curved surface in this embodiment simultaneously applies centrifugal force and axial propulsive force to the air, and as a result, the airflow is as indicated by an arrow 45. It flows obliquely with respect to the rotation surface 26 at the outlet 14 b of the impeller 14. The airflow exiting from the outlet 14 b enters the air guide 16, and pressure is recovered in the air passage 35 surrounded by the stationary blade 15. The airflow from the air guide 16 enters the motor through the communication port 20 provided in the bracket 13b of the motor 13, passes through, and flows out from the exhaust port 21 of the frame 13c. Thus, in the electric blower of the present embodiment, the air flow sucked from the intake port 17a does not bend greatly in the radial direction unlike the conventional centrifugal blower, and flows almost in the axial direction. Since the entire air flow including the flow path in the electric motor can be arranged uniformly in the axial direction, a compact configuration in the radial direction is possible. That is, the ratio between the outer diameter of the air guide 16 and the outer diameter of the impeller, that is, the value obtained by dividing the outer diameter of the impeller 14 by the outer diameter of the air guide 16 is larger than that of the conventional centrifugal blower. Since the impeller receives not only a centrifugal load but also a propulsion load, the torque, that is, the output with respect to the outer diameter of the impeller 14 also increases. For these reasons, the outer diameter of the air guide 16 can be made smaller than the outer diameter of the frame 13c. The blower 11 can be obtained. Moreover, since the passage loss at the time of a large air volume is reduced, the efficiency when incorporated in a vacuum cleaner is improved.

なお、本発明のインペラ１４に関してはファンケース１７とインペラ１４の組み立て精度を高めれば、シュラウド２５が無い構成も可能であり、樹脂一体成形による製造も可能である。   In addition, regarding the impeller 14 of this invention, if the assembly precision of the fan case 17 and the impeller 14 is raised, the structure without the shroud 25 is also possible and the manufacture by resin integral molding is also possible.

（実施例２）
次に、本発明の第２の実施例を説明する。図８は実施例２におけるエアガイドの外径がインペラの外径よりも小さい電動送風機の要部断面図である。尚、実施例１と同一の部分には同一符号を付してその詳細な説明を省略する。 (Example 2)
Next, a second embodiment of the present invention will be described. FIG. 8 is a cross-sectional view of a main part of the electric blower in which the outer diameter of the air guide in the second embodiment is smaller than the outer diameter of the impeller. In addition, the same code | symbol is attached | subjected to the part same as Example 1, and the detailed description is abbreviate | omitted.

５１はエアガイドであり、電動機５２の内部に配置されている。エアガイド５１は図で示すように基板筒５５の外周に複数枚の静翼５３を配置することにより構成されている。５９は静翼５３で囲まれた空気通路を示す。図９（ａ）はブラケット５２ｂを、図９（ｂ）はエアガイド５１を示し、エアガイド５１の入口５１ａに対応した連通口５４を有している。インペラ１４を内蔵したファンケース１７はブラケット５２ｂの外周に圧入固定されている。ブラケット５２ｂとフレーム５２ｃは同一外径であり、エアガイド５１の外径はインペラ１４の外径よりも小さい。   Reference numeral 51 denotes an air guide, which is disposed inside the electric motor 52. The air guide 51 is configured by arranging a plurality of stationary blades 53 on the outer periphery of the substrate cylinder 55 as shown in the figure. Reference numeral 59 denotes an air passage surrounded by the stationary blade 53. 9A shows the bracket 52b, and FIG. 9B shows the air guide 51. The air guide 51 has a communication port 54 corresponding to the inlet 51a. The fan case 17 incorporating the impeller 14 is press-fitted and fixed to the outer periphery of the bracket 52b. The bracket 52 b and the frame 52 c have the same outer diameter, and the outer diameter of the air guide 51 is smaller than the outer diameter of the impeller 14.

インペラ１４から出た気流が軸方向側に傾斜しているため、多少性能は劣るが、インペラの外径よりも小さなエアガイドでも圧力回復効果が得られ、非常にコンパクトな電動送風機を実現できる。なおエアガイド５１がブラケット５２ｂの外側に取り付く実施例１のような方式でも、インペラ１４径よりも小さなエアガイド径を実現できることは自明である。   Since the airflow from the impeller 14 is inclined in the axial direction, the performance is somewhat inferior, but a pressure recovery effect can be obtained even with an air guide smaller than the outer diameter of the impeller, and a very compact electric blower can be realized. It is obvious that the air guide diameter smaller than the diameter of the impeller 14 can be realized even in the system as in the first embodiment in which the air guide 51 is attached to the outside of the bracket 52b.

電動機内にエアガイドを収納する他の実施例として、図１０はブラケット５２ｂとエアガイド５１が一体になった例であり、板金で作られたブラケット５２ｂの連通口５４を板金を切り起こして作り、切り起こした板金を静翼５３とした構成である。もちろんブラケット５２ｂを樹脂で成形し、静翼を同時に構成する方法もある。   FIG. 10 shows another example in which the air guide is housed in the electric motor. FIG. 10 shows an example in which the bracket 52b and the air guide 51 are integrated, and the communication port 54 of the bracket 52b made of sheet metal is made by cutting and raising the sheet metal. The cut and raised sheet metal is used as a stationary blade 53. Of course, there is a method in which the bracket 52b is formed of resin and the stationary blades are formed at the same time.

このように、回転軸５２ａ方向に傾斜して流れる気流を前提としたエアガイド５１の構成であれば、電動機５２内にエアガイド５１を収納することも容易である。ブラケット５２ｂが金属製であるとき、絶縁物で構成されたエアガイド５１を電動機５２内に設置すれば、電動機５２のコイル５２ｄに接近してエアガイドを配置でき、エアガイド５１をブラケット５２ｂに載置した構成に比べ、絶縁距離の関係で電動送風機の全長を短く構成することが可能である。エアガイド５１全体が電動機内に収納されず、構成上必要な一部分が電動機内に収容できれば、同様な理由で電動送風機の全長を短くすることが可能である。   As described above, the air guide 51 can be easily accommodated in the electric motor 52 as long as the air guide 51 has a configuration in which airflow is inclined and flowing in the direction of the rotation shaft 52a. When the bracket 52b is made of metal, if the air guide 51 made of an insulator is installed in the electric motor 52, the air guide can be placed close to the coil 52d of the electric motor 52, and the air guide 51 is mounted on the bracket 52b. Compared with the installed configuration, the total length of the electric blower can be shortened due to the insulation distance. If the entire air guide 51 is not accommodated in the electric motor and a part necessary for the structure can be accommodated in the electric motor, the entire length of the electric blower can be shortened for the same reason.

（実施例３）
次に、図１１を用いて本発明の第３の実施例を説明する。図１１（ｂ）は排気側より見た図を示す。実施例１との主たる相違はエアガイド６１から流出した気流の流れる通路の部分である。尚、実施例１と同一の部分は同一符号を付してその詳細な説明を省略する。 (Example 3)
Next, a third embodiment of the present invention will be described with reference to FIG. FIG.11 (b) shows the figure seen from the exhaust side. The main difference from the first embodiment is the portion of the passage through which the airflow flowing out from the air guide 61 flows. In addition, the same part as Example 1 attaches | subjects the same code | symbol, and abbreviate | omits the detailed description.

６１は本実施例におけるエアガイドであり、複数枚の静翼６３を円筒状の基板筒６５外周に放射線状に取り付けることにより構成している。６２は電動機であり、ブラケット６２ｂ、及びフレーム６２ｃには空気の通過する孔が無く全閉型の電動機である。エアガイド６１の基板筒６５は電動機６２のブラケット６２ｂ外周に取り付けられ、その外周にはファンケース６７と一体になった外筒６８が設置されている。そして静翼６３、基板筒６５、外筒６８で仕切られた圧力回復用の空気通路６９が形成されている。   Reference numeral 61 denotes an air guide in the present embodiment, which is configured by attaching a plurality of stationary blades 63 radially to the outer periphery of a cylindrical substrate cylinder 65. Reference numeral 62 denotes an electric motor, and the bracket 62b and the frame 62c have no holes through which air passes and are fully closed electric motors. The substrate cylinder 65 of the air guide 61 is attached to the outer periphery of the bracket 62b of the electric motor 62, and the outer cylinder 68 integrated with the fan case 67 is installed on the outer periphery thereof. An air passage 69 for pressure recovery partitioned by the stationary blade 63, the substrate cylinder 65, and the outer cylinder 68 is formed.

エアガイド６１の入口６１ａはインペラの出口１４ｂと対峙し、エアガイド６１の出口６１ｂは、電動機６２のフレーム６２ｃと外筒６８の間の排気通路７０に開口している。   The inlet 61 a of the air guide 61 faces the outlet 14 b of the impeller, and the outlet 61 b of the air guide 61 opens into the exhaust passage 70 between the frame 62 c of the electric motor 62 and the outer cylinder 68.

以上の構成であれば、フレーム６２ｃの外側にエアガイドを配置できるため、ブラケット６２ｂに連通口が、フレーム６２ｃに排気口が必要でなくなり、連通口、排気口での通過圧損が低減でき、又ブラケット６２ｂ、フレーム６２ｃの機械的強度を大きくすることができ、より高速な運転が可能になる。又騒音も低減できる。   With the above configuration, since the air guide can be disposed outside the frame 62c, a communication port is not required for the bracket 62b and an exhaust port is not required for the frame 62c, and passage pressure loss at the communication port and the exhaust port can be reduced. The mechanical strength of the bracket 62b and the frame 62c can be increased, and higher speed operation is possible. Noise can also be reduced.

（実施例４）
次に、図１２を用いて本発明の第４の実施例について説明する。図１２は、本発明の電動送風機１１を掃除機本体７５に組み込む際の構成であり、電動送風機１１は掃除機本体７５に防振ゴム前７６、及び防振ゴム後７７で防振支持されている。防振ゴム前７６は、ファンケース１７の前部に設けたリング状のツバ部７８の外周に、防振ゴム前７６の内周部の溝Ａ７６ａを勘合させ取り付けている。７９は入り口エアガイドであり図１２（ｂ）、図１２（ｃ）で示すように複数枚の静翼７９ａを放射状に配置することに構成し、防振ゴム前７６の内周の溝Ｂ７６ｂに嵌合させて取り付けている。静翼７９ａは、掃除機本体７５及び電動送風機１１とは直接接触していない。このような軸方向の移動の規制手段を軸心に近い位置に設けることにより、防振ゴム自身の硬度は小さくすることが可能になり、防振性に優れた低騒音な電気掃除機を実現できる。図１３は防振ゴム前を示している。 Example 4
Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 12 shows a configuration when the electric blower 11 according to the present invention is incorporated in the cleaner body 75, and the electric blower 11 is supported by the cleaner body 75 on the anti-vibration rubber front 76 and the anti-vibration rubber post 77 on the anti-vibration basis. Yes. The anti-vibration rubber front 76 is attached to the outer periphery of a ring-shaped flange portion 78 provided at the front portion of the fan case 17 by fitting the groove A 76a in the inner peripheral portion of the anti-vibration rubber front 76. Reference numeral 79 denotes an inlet air guide, which is configured to radially arrange a plurality of stationary blades 79a as shown in FIGS. 12B and 12C, and is formed in a groove B76b on the inner periphery of the anti-vibration rubber front 76. It is fitted and attached. The stationary blade 79 a is not in direct contact with the cleaner body 75 and the electric blower 11. By providing such axial movement restricting means at a position close to the shaft center, it is possible to reduce the hardness of the anti-vibration rubber itself, realizing a low-noise vacuum cleaner with excellent anti-vibration properties. it can. FIG. 13 shows the front of the anti-vibration rubber.

防振ゴム前７６は掃除機本体７５の集塵室連通口７５ａの周囲に配置され、吸気と排気の間のシールを兼ねているため、電動送風機１１を運転すると吸引力のため電動送風機１１は前方、すなわち上流側に吸引される。この吸引力を支持し、電動送風機１１の過度な軸方向への移動を防止するため、ファンケース１７の前部にツバ部７８を構成し、吸引力を支持する端面７８ａを構成している。   The anti-vibration rubber front 76 is disposed around the dust collection chamber communication port 75a of the vacuum cleaner main body 75 and also serves as a seal between the intake air and the exhaust air. It is sucked forward, that is, upstream. In order to support this suction force and prevent the electric blower 11 from moving excessively in the axial direction, a flange portion 78 is formed at the front portion of the fan case 17 and an end surface 78a that supports the suction force is formed.

防振ゴム前７６の内周部に設けた入り口エアガイド７９は、電動送風機１１に流入する気流の旋回成分が増大する事を抑制し、損失の低減を図っている。   The inlet air guide 79 provided in the inner peripheral portion of the vibration isolating rubber front 76 suppresses an increase in the swirling component of the airflow flowing into the electric blower 11 to reduce loss.

又、この入り口エアガイド７９ａをファンケース１７側に取り付ける事も可能である。   It is also possible to attach this inlet air guide 79a to the fan case 17 side.

（実施例５）
次に、図１４を用いて本発明の第５の実施例について説明する。図１４は、本発明の電動送風機を電気掃除機本体７５に組み込んだ際の要部断面図を示す。本実施例での掃除機本体構成は、ホース、延長管が無い、アップライト構成である。 (Example 5)
Next, a fifth embodiment of the present invention will be described with reference to FIG. FIG. 14: shows principal part sectional drawing at the time of incorporating the electric blower of this invention in the vacuum cleaner main body 75. FIG. The cleaner body configuration in the present embodiment is an upright configuration without a hose and an extension tube.

１１は電動送風機であり、実施例４で述べたように掃除機本体７５に防振支持されている。８１は電池であり、電動送風機１１を駆動する電源である。すなわち本実施例では、商用交流電源を使用しないコードレス型の構成を有している。８２は集塵部であり、サイクロン型の遠心分離機構を有している。８３は円筒型の集塵箱８４内に設けた軸流型の固定羽根であり、円柱状の中央ハブ８５部分に固定されている。８６は吸い込みノズル８７からの気流を導く入り口ガイドであり、８８は出口ガイドを示す。   Reference numeral 11 denotes an electric blower which is supported by the cleaner main body 75 in an anti-vibration manner as described in the fourth embodiment. A battery 81 is a power source for driving the electric blower 11. That is, this embodiment has a cordless configuration that does not use a commercial AC power supply. A dust collecting unit 82 has a cyclone type centrifugal separation mechanism. Reference numeral 83 denotes an axial flow type fixed blade provided in a cylindrical dust collection box 84, which is fixed to a cylindrical central hub 85 portion. Reference numeral 86 denotes an inlet guide that guides the airflow from the suction nozzle 87, and 88 denotes an outlet guide.

本実施例の電気掃除機を駆動すると、床面８９の上に置かれた吸い込みノズル８７から塵埃が吸引される。塵埃を含んだ気流は入口ガイド８６に導かれながら固定羽根８３を通過し、矢印９０で示す強い旋回流となる、旋回する気流に含まれた塵埃は遠心力のため外周側に移動し、集塵箱の外周に押しつけられる。塵埃が分離した清浄な気流は矢印９０ａのように出口ガイド８８と中央ハブ８５の間を通過して電動送風機１１へ吸引され、掃除機本体７５の排気口７５ａから排気される。外側に移動した塵埃９２は出口ガイド８８の外側に集まり、重力により徐々に落下し、入口ガイドと集塵箱側壁８４ａの間の空間９１に貯められる。   When the vacuum cleaner of the present embodiment is driven, dust is sucked from the suction nozzle 87 placed on the floor surface 89. The air flow including dust passes through the fixed blade 83 while being guided to the inlet guide 86, and becomes a strong swirl flow indicated by an arrow 90. The dust contained in the swirling air flow moves to the outer peripheral side due to centrifugal force, and is collected. Pressed against the outer periphery of the dust box. The clean airflow from which the dust is separated passes between the outlet guide 88 and the central hub 85 as indicated by an arrow 90a and is sucked into the electric blower 11 and exhausted from the exhaust port 75a of the cleaner body 75. The dust 92 moved to the outside gathers outside the outlet guide 88, gradually falls due to gravity, and is stored in the space 91 between the inlet guide and the dust box side wall 84a.

本発明の電動送風機は、斜流型インペラを用いているため、径方向に小型でかつ高風量時の高効率運転ができる。そのため掃除機本体としては径の小さなアップライト型の掃除機が実現できる。又、塵埃の主たる分離手段として集塵部に紙袋などの通過型フィルタを用いず、遠心分離型集塵方式を用いれば、塵埃の目詰りによる圧損の増加は無く、常に低圧、高風量の運転が可能になり、本発明の電動送風機を用いれば、より高効率な運転が可能になる。又コードレス式の電気掃除機に、本発明の電送送風機を用いる、あるいは上述した構成を用いれば従来の電気掃除機に比べ効率が改善され、長時間の連続運転が可能になる。   Since the electric blower of the present invention uses a mixed flow type impeller, the electric blower is small in the radial direction and can perform high-efficiency operation at a high air volume. Therefore, an upright vacuum cleaner with a small diameter can be realized as the vacuum cleaner body. In addition, if a centrifugal filter is used instead of a paper bag or other pass filter as the main dust separating means, pressure loss due to dust clogging will not increase, and operation at low pressure and high airflow will always be possible. If the electric blower of the present invention is used, a more efficient operation is possible. Further, if the electric blower of the present invention is used for the cordless type vacuum cleaner or the above-described configuration is used, the efficiency is improved as compared with the conventional vacuum cleaner, and a continuous operation for a long time becomes possible.

本発明の実施例１における電気掃除機用電動送風機の部分断面図Partial sectional drawing of the electric blower for vacuum cleaners in Example 1 of the present invention 同、インペラの斜視図Same perspective view of impeller 同、シュラウドを分離した斜視図The perspective view which separated the shroud （ａ）同、平面図（ｂ）同、シュラウドが無い場合の平面図(A) The same plan view (b) The same plan view without the shroud 同、シュラウドを分離した正面図Front view with shroud separated （ａ）同エアガイドの上流側側面図（ｂ）同正面図（ｃ）同下流側側面図（ｄ）同静翼の断面図（ｅ）同静翼の断面図(A) Upstream side view of the air guide (b) Front view (c) Downstream side view (d) Cross section of the stationary blade (e) Cross section of the stationary blade （ａ）同電動機のブラケット側から見た図（ｂ）同電動機の一部断面図（ｃ）同フレーム側からみた図(A) View from the bracket side of the electric motor (b) Partial sectional view of the electric motor (c) View from the frame side 本発明の実施例２における電気掃除機用電動送風機の一部断面図Partial sectional drawing of the electric blower for vacuum cleaners in Example 2 of this invention （ａ）同、ブラケットの形状を示す図（ｂ）同、エアガイドの形状を示す図（ｃ）同、静翼の断面図(A) The figure which shows the shape of a bracket, (b) The figure which shows the shape of an air guide (c) The same, The sectional view of a stationary blade （ａ）同、他の実施例を示す電気掃除機用電動送風機の一部断面図（ｂ）同、連通口の一部欠載要部断面図（ｃ）同、ブラケット部の形状を示す図(A) Partial sectional view of an electric blower for a vacuum cleaner according to another embodiment, (b) Partial sectional view of main part of the communication port, (c) FIG. （ａ）本発明の実施例３における電気掃除機用電動送風機の一部断面図（ｂ）同フレーム側からみた側面図(A) Partial sectional view of an electric blower for a vacuum cleaner in Example 3 of the present invention (b) Side view seen from the frame side （ａ）本発明の実施例４における電気掃除機用電動送風機を掃除機本体に組み込んだ状態の一部断面図（ｂ）同静翼の断面図（ｃ）同エアガイドの形状を示す図(A) Partial cross-sectional view of a state in which the electric blower for a vacuum cleaner in Embodiment 4 of the present invention is incorporated in the main body of the vacuum cleaner (b) Cross-sectional view of the stationary blade (c) Diagram showing the shape of the air guide （ａ）同防振ゴム前の正面図（ｂ）同防振ゴム前の側面断面図(A) Front view before the anti-vibration rubber (b) Side sectional view before the anti-vibration rubber 本発明の実施例５における電気掃除機用電動送風機を掃除機本体に組み込んだ状態の一部断面図Partial sectional drawing of the state which incorporated the electric blower for vacuum cleaners in Example 5 of this invention in the vacuum cleaner main body. （ａ）従来の電気掃除機用電動送風機のファンケースを外した場合の平面図（ｂ）同正面一部断面図(A) The top view at the time of removing the fan case of the electric blower for conventional vacuum cleaners (b) The front partial sectional view

符号の説明Explanation of symbols

１１ 電動送風機
１３、５２ 電動機
１３ｂ ブラケット
１３ｃ、５２ｃ、６２ｃ フレーム
１４ インペラ
１６、５１、６１ エアガイド
１７ ファンケース
２２ ブレード
２３ ハブ
２６ 回転面
２７ａ 長辺
２９ａ 短辺
３２ ブレード面
３９ 軸受け
５２ｂ、６２ｂ ブラケット
７５ 掃除機本体
７６ 防振ゴム前
７８ａ 端面
７９ 入口エアガイド
８１ 電池
８２ 集塵部 DESCRIPTION OF SYMBOLS 11 Electric blower 13, 52 Electric motor 13b Bracket 13c, 52c, 62c Frame 14 Impeller 16, 51, 61 Air guide 17 Fan case 22 Blade 23 Hub 26 Rotating surface 27a Long side 29a Short side 32 Blade surface 39 Bearing 52b, 62b Bracket 75 Vacuum cleaner body 76 Anti-vibration rubber front 78a End face 79 Inlet air guide 81 Battery 82 Dust collector

Claims (8)

４辺形の曲面であるブレードの下端側長辺の外周端部が回転面に対し傾斜し、インペラの入口から軸方向に流入しブレードに沿って流れる吸引気流が径方向と軸方向の間の角度で出口から流出する、斜流型ブレードを有したインペラと、インペラの下流側に配置したエアガイドと、軸端に上記インペラを固着し回転駆動する電動機とからなり、前記電動機の軸受けの一部がインペラのハブ内に位置する電気掃除機用電動送風機。 The outer peripheral end of the long side of the lower end side of the blade, which is a quadrilateral curved surface, is inclined with respect to the rotation surface, and the suction airflow that flows in the axial direction from the impeller inlet and flows along the blade is between the radial direction and the axial direction. An impeller having a mixed flow type blade that flows out from an outlet at an angle, an air guide disposed on the downstream side of the impeller, and an electric motor that rotates and drives the impeller fixed to the shaft end. An electric blower for a vacuum cleaner whose part is located in the hub of the impeller. ブレードの入口側短辺がほぼ回転面上にあり、入口端部でブレード面が回転面に対し傾斜した請求項１記載の電気掃除機用電動送風機。 The electric blower for a vacuum cleaner according to claim 1, wherein the short side of the inlet side of the blade is substantially on the rotating surface, and the blade surface is inclined with respect to the rotating surface at the inlet end. インペラから流出した気流が、電動機のフレーム内部を通過する請求項１または２記載の電気掃除機用電動送風機。 The electric blower for a vacuum cleaner according to claim 1 or 2, wherein the airflow flowing out from the impeller passes through the inside of the frame of the electric motor. インペラから流出した気流が、電動機のフレーム外部を通過する請求項１または２記載の電気掃除機用電動送風機。 The electric blower for a vacuum cleaner according to claim 1 or 2, wherein the airflow flowing out of the impeller passes through the outside of the frame of the electric motor. エアガイド外径が電動機フレームの外径と同じあるいは小さな請求項１〜４のいずれか１項に記載の電気掃除機用電動送風機。 The electric blower for a vacuum cleaner according to any one of claims 1 to 4, wherein an outer diameter of the air guide is the same as or smaller than an outer diameter of the electric motor frame. インペラ外径よりエアガイドの外径が小さい請求項１〜５のいずれか１項に記載の電気掃除機用電動送風機。 The electric blower for a vacuum cleaner according to any one of claims 1 to 5, wherein the outer diameter of the air guide is smaller than the outer diameter of the impeller. ファンケースの入口側にエアガイドを有した請求項１〜６のいずれか１項に記載の電気掃除機用電動送風機。 The electric blower for a vacuum cleaner according to any one of claims 1 to 6, further comprising an air guide on an inlet side of the fan case. 請求項１〜７のいずれか１項に記載の電気掃除機用電動送風機を内蔵し、かつ電源として内蔵された電池を用いるコードレス型の電気掃除機。 The cordless type vacuum cleaner which uses the battery which incorporated the electric blower for vacuum cleaners of any one of Claims 1-7, and was incorporated as a power supply.
JP2005177255A 2005-06-17 2005-06-17 Electric blower for vacuum cleaner and vacuum cleaner using same Pending JP2005307985A (en)

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