JP2010261392A - Electric blower and vacuum cleaner using the same - Google Patents

Electric blower and vacuum cleaner using the same Download PDF

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JP2010261392A
JP2010261392A JP2009113716A JP2009113716A JP2010261392A JP 2010261392 A JP2010261392 A JP 2010261392A JP 2009113716 A JP2009113716 A JP 2009113716A JP 2009113716 A JP2009113716 A JP 2009113716A JP 2010261392 A JP2010261392 A JP 2010261392A
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fan
rotating
side plate
electric blower
rotary
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Japanese (ja)
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Yasuaki Kato
康明 加藤
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Priority to JP2009113716A priority Critical patent/JP2010261392A/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
    • F04D29/30—Vanes
    • 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
    • F04D29/08—Sealings
    • F04D29/16—Sealings between pressure and suction sides
    • F04D29/161—Sealings between pressure and suction sides especially adapted for elastic fluid pumps
    • F04D29/162—Sealings between pressure and suction sides especially adapted for elastic fluid pumps of a centrifugal flow wheel
    • 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
    • F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis

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

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric blower improved in blowing efficiency and capable of maintaining the high blowing efficiency for a long time by restricting leakage circulation of an air flow, which is discharged from a rotary fan, returning to an intake opening through a clearance between the rotary fan and a fan cover. <P>SOLUTION: A plurality of auxiliary blades 8 shorter than a rotary blade 1c in chord length are arranged between a rotating side plate 1b and a fan cover 7 so as to be rotated with a rotary fan 1. A flow opposing to a leakage circulation flow is generated by the pressure raising operation (blowing operation) of the auxiliary blades 8 to reduce the leakage circulation flow. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、送風効率を向上させ得る電動送風機と、この電動送風機を用いた電気掃除機に関する。   The present invention relates to an electric blower that can improve the blowing efficiency and a vacuum cleaner using the electric blower.

電気掃除機に使用される電動送風機は、高静圧、小風量の運転を行えるようになっている。したがって、回転ファンの排気がファンカバーと回転側板との間を通って回転ファンの給気口に戻る漏れ循環流れがあると、送風効率が悪くなる。このため、従来から漏れ循環流れを低減させて、送風効率を向上させるようにしたものが種々提案されている。   The electric blower used for the vacuum cleaner can be operated with a high static pressure and a small air volume. Therefore, if there is a leakage circulation flow in which the exhaust of the rotary fan passes between the fan cover and the rotary side plate and returns to the air supply port of the rotary fan, the blowing efficiency is deteriorated. For this reason, various proposals have been conventionally made in which the leakage circulation flow is reduced to improve the blowing efficiency.

例えば、樹脂製のファンカバースペーサーを板金製のファンカバーへ吸気上流側から挿入し、固定するとともに、ファンカバースペーサーを回転ファンの吸気口に当接させた後、当接したシーリング部を回転ファンの回転により切削することで、シーリング部を形成し、このシーリング部とこれに対向する回転ファンの吸込口との間の半径方向におけるラビリンス隙間を小さくするようにしたものがある（例えば、特許文献１参照）。   For example, a resin fan cover spacer is inserted into and fixed to a sheet metal fan cover from the upstream side of the intake air, and the fan cover spacer is brought into contact with the intake port of the rotary fan, and then the contacted sealing portion is moved to the rotary fan. There is a structure in which a sealing portion is formed by cutting by rotation of the rotating portion, and the labyrinth gap in the radial direction between the sealing portion and the suction port of the rotating fan facing the sealing portion is reduced (for example, Patent Documents) 1).

特開平５−７６１５３号公報（図１、図２）Japanese Patent Laid-Open No. 5-76153 (FIGS. 1 and 2)

しかしながら、ファンカバースペーサーを回転ファンの吸気口に当接させた後、当接したシーリング部を回転ファンの回転により切削することで、シーリング部を形成するようにしたものにあっては、電動送風機の運転が継続されるに伴ない、ファンカバースペーサーの接触部の磨耗が進み、漏れ循環流れの抑制効果が薄れていくという難点があった。   However, in the case where the sealing part is formed by cutting the contacted sealing part by the rotation of the rotating fan after the fan cover spacer is brought into contact with the inlet of the rotating fan, the electric blower As the operation continued, the wear of the contact portion of the fan cover spacer progressed, and the effect of suppressing the leakage circulation flow was reduced.

本発明の技術的課題は、回転ファンから吐出された気流が、回転ファンとファンカバーの間の間隙を通って給気口に戻る漏れ循環流れを抑制して、送風効率を向上させ、かつこの高い送風効率を長期間維持できるようにすることにある。   The technical problem of the present invention is to improve the blowing efficiency by suppressing the leakage circulation flow in which the airflow discharged from the rotary fan returns to the air supply port through the gap between the rotary fan and the fan cover. The purpose is to maintain a high blowing efficiency for a long period of time.

本発明に係る電動送風機は、中央部にファン吸気口を有する回転側板、この回転側板に対向する平板状の回転主板、及びこれら回転側板と回転主板との間に設けられた複数枚の回転翼、を有する回転ファンと、回転ファンがシャフトに固定されたモーターと、回転ファンが吐出した気流を減速、静圧回復させるディフューザー部と、回転ファンとディフューザー部を内包し中央部にファン吸気口と僅かな隙間を介してこのファン吸気口の内側に入り込んだファンカバー吸気口を有するファンカバーと、回転側板とファンカバーとの間に配置されて回転ファンと共に回転し、弦長が回転翼よりも短い複数の補助翼と、を備えるものである。   An electric blower according to the present invention includes a rotating side plate having a fan air inlet at the center, a flat plate-like rotating main plate facing the rotating side plate, and a plurality of rotating blades provided between the rotating side plate and the rotating main plate. A rotating fan having a shaft, a motor with the rotating fan fixed to the shaft, a diffuser section that decelerates and recovers static airflow discharged from the rotating fan, a fan intake opening that includes the rotating fan and the diffuser section, A fan cover that has a fan cover intake port that enters the inside of this fan intake port through a slight gap, and is arranged between the rotating side plate and the fan cover and rotates together with the rotating fan. A plurality of short auxiliary wings.

本発明に係る電動送風機においては、ファンカバーと回転側板との間の補助翼の昇圧作用（送風作用）により、回転ファンの吐出気流がファンカバーと回転側板との間を通って、ファン吸気口に戻る漏れ循環流れに対向する流れを発生させることができる。このため、漏れ循環流れを低減させることができ、電動送風機の送風効率を向上させることができる。また、補助翼は、ファンカバーと接触する構造ではないので、磨耗することがなく、高い送風効率の効果を長期間維持することができる。   In the electric blower according to the present invention, the discharge airflow of the rotating fan passes between the fan cover and the rotating side plate by the pressure increasing action (air blowing action) of the auxiliary blade between the fan cover and the rotating side plate, and the fan intake port A flow can be generated that opposes the leakage circulation flow back to. For this reason, a leakage circulation flow can be reduced and the ventilation efficiency of an electric blower can be improved. In addition, since the auxiliary wing is not structured to come into contact with the fan cover, it is not worn and the effect of high air blowing efficiency can be maintained for a long time.

本発明の実施の形態１に係る電動送風機の構成を示す縦断面図である。It is a longitudinal cross-sectional view which shows the structure of the electric blower which concerns on Embodiment 1 of this invention. 図１の要部拡大図である。It is a principal part enlarged view of FIG. 本発明の実施の形態１に係る電動送風機の回転ファンと補助翼の関係を示す上面図である。It is a top view which shows the relationship between the rotary fan and auxiliary blade of the electric blower which concerns on Embodiment 1 of this invention. 図３の要部拡大図である。It is a principal part enlarged view of FIG. 図３のＡ−Ａ線に沿う断面をファンカバーも加えて外周側から見た展開図である。It is the expanded view which looked at the cross section which followed the AA line of FIG. 3 from the outer peripheral side also adding the fan cover. 本発明の実施の形態２に係る電動送風機の回転ファンと補助翼の関係を示す上面図である。It is a top view which shows the relationship between the rotary fan and auxiliary blade of the electric blower which concerns on Embodiment 2 of this invention. 本発明の実施の形態３に係る電動送風機の要部断面図である。It is principal part sectional drawing of the electric blower which concerns on Embodiment 3 of this invention. 本発明の電動送風機を用いた電気掃除機の概略構成図である。It is a schematic block diagram of the vacuum cleaner using the electric blower of this invention.

実施の形態１．
図１は本発明の実施の形態１に係る電動送風機の全体構成を示す縦断面図、図２はその要部拡大図、図３はその回転ファンと補助翼の関係を示す上面図、図４は図３の要部拡大図、図５は図３のＡ−Ａ線に沿う断面をファンカバーも加えて外周側から見た展開図である。 Embodiment 1 FIG.
1 is a longitudinal sectional view showing an overall configuration of an electric blower according to Embodiment 1 of the present invention, FIG. 2 is an enlarged view of a main part thereof, FIG. 3 is a top view showing a relationship between the rotating fan and auxiliary blades, and FIG. Fig. 5 is an enlarged view of a main part of Fig. 3, and Fig. 5 is a developed view of the cross section taken along the line A-A in Fig. 3 as seen from the outer periphery side with a fan cover added.

本実施の形態の電動送風機１５は、図１及び図２のように回転ファン１と、回転ファン１をシャフト３に固定したモーター２とを備えている。   The electric blower 15 of the present embodiment includes a rotating fan 1 and a motor 2 that fixes the rotating fan 1 to a shaft 3 as shown in FIGS. 1 and 2.

回転ファン１は、平板状の回転主板１ａと、回転主板１ａの上部に配置されて対向し、中央部に円状のファン吸気口１ｄを有し、流出側になるに従って下方に傾斜して回転主板１ａとの距離が小さくなるように形成された傘状の回転側板１ｂと、回転主板１ａと回転側板１ｂとの間に挟持された複数枚の回転翼１ｃとで構成され、モーター２のシャフト３に固定されている。   The rotating fan 1 is disposed opposite to the flat rotating main plate 1a and the upper portion of the rotating main plate 1a. The rotating fan 1 has a circular fan inlet 1d at the center, and is inclined downward and rotated toward the outflow side. The shaft of the motor 2 is composed of an umbrella-shaped rotating side plate 1b formed so that the distance from the main plate 1a is small, and a plurality of rotating blades 1c sandwiched between the rotating main plate 1a and the rotating side plate 1b. 3 is fixed.

回転ファン１の外周には、複数枚の静翼５を有し、回転ファン１が吐出した気流を減速、静圧回復させるディフューザー部４が設けられ、気流をモーター２内に導く戻り風路６に連通接続されている。   On the outer periphery of the rotary fan 1, there is provided a diffuser portion 4 that has a plurality of stationary blades 5, decelerates the airflow discharged from the rotary fan 1, and recovers static pressure, and a return air passage 6 that guides the airflow into the motor 2. It is connected in communication.

また、回転ファン１とディフューザー部４を内包するとともに上部中央部にベルマウス状のファンカバー吸気口７ａを有するファンカバー７が設けられている。ファンカバー吸気口７ａは、ファン吸気口１ｄの内周に回転側板１ｂと僅かな隙間を介して入り込むように形成されている。   In addition, a fan cover 7 that includes the rotary fan 1 and the diffuser portion 4 and has a bell mouth-shaped fan cover intake port 7a is provided in the upper central portion. The fan cover air inlet 7a is formed so as to enter the inner periphery of the fan air inlet 1d through a slight gap with the rotating side plate 1b.

また、回転側板１ｂとファンカバー７との間、つまり回転側板１ｂの周縁部の上面に、回転ファン１と共に回転する複数の補助翼８が設けられている。   A plurality of auxiliary blades 8 that rotate together with the rotary fan 1 are provided between the rotary side plate 1b and the fan cover 7, that is, on the upper surface of the peripheral edge of the rotary side plate 1b.

これを回転ファン１と補助翼８の関係を回転ファン軸線方向から示す図３の上面図に基づき更に詳述する。図３において、回転側板１ｂの奥側にある回転翼１ｃは破線で示し、手前側にある補助翼８は実線で示している。白抜き矢印は回転ファン１、補助翼８の回転方向を示している。補助翼８は、弦長が回転翼１ｃよりも短く、その外周端のファン中心からの距離、つまりモーター２のシャフト３を中心として、この中心から補助翼外周端までの距離が、回転翼１ｃのそれと同程度の径（距離）位置となるように、回転側板１ｂの周縁部に配置されている。   This will be described in more detail based on the top view of FIG. 3 showing the relationship between the rotary fan 1 and the auxiliary blade 8 from the axial direction of the rotary fan. In FIG. 3, the rotary blade 1c on the back side of the rotary side plate 1b is indicated by a broken line, and the auxiliary blade 8 on the near side is indicated by a solid line. The white arrow indicates the rotation direction of the rotary fan 1 and the auxiliary blade 8. The auxiliary blade 8 has a chord length shorter than that of the rotor blade 1c, and the distance from the outer peripheral end of the fan center, that is, the distance from the center to the outer peripheral edge of the auxiliary blade centering on the shaft 3 of the motor 2 is the rotor blade 1c. It is arrange | positioned at the peripheral part of the rotation side board 1b so that it may become a diameter (distance) position comparable as that of this.

また、補助翼８は、回転ファン軸線方向から見た外周端の位置、つまり図３の上面図で見て外周端の位置が、回転翼１ｃの外周端近傍の回転方向後方にずれて位置するように配置されている。翼は内周から外周に向かい回転方向の後方に向かう向きに反る後向き羽根に構成されている。   Further, the auxiliary blade 8 is positioned such that the position of the outer peripheral edge viewed from the rotational fan axial direction, that is, the position of the outer peripheral edge viewed from the top view of FIG. 3 is shifted backward in the rotation direction near the outer peripheral edge of the rotary blade 1c. Are arranged as follows. The wing is configured as a backward-facing blade that warps in the direction from the inner periphery toward the outer periphery toward the rear in the rotational direction.

次に、本実施の形態の電動送風機１５の動作について説明する。
モーター２を駆動するとシャフト３に取り付けられた回転ファン１が回転し、回転翼１ｃの仕事により、圧力は、ファン吸気口１ｄでは相対的に低く、回転ファン１の外周では相対的に高くなる。ファン吸気口１ｄから流入する空気は、図１、図２中の矢印のように軸方向から径方向に転向する。ファンカバー７とファン吸気口１ｄとの間、ファンカバー７と回転側板１ｂの外周端との間には隙間があるので、前述の圧力差により、ファンカバー７と回転側板１ｂの間をファン吸気口１ｄに向かって流れる漏れ循環流れが生じる。 Next, operation | movement of the electric blower 15 of this Embodiment is demonstrated.
When the motor 2 is driven, the rotary fan 1 attached to the shaft 3 rotates, and due to the work of the rotary blade 1c, the pressure is relatively low at the fan intake port 1d and relatively high at the outer periphery of the rotary fan 1. The air flowing in from the fan intake port 1d turns from the axial direction to the radial direction as indicated by arrows in FIGS. Since there is a gap between the fan cover 7 and the fan intake port 1d and between the fan cover 7 and the outer peripheral end of the rotation side plate 1b, the fan intake between the fan cover 7 and the rotation side plate 1b is caused by the pressure difference described above. A leakage circulation flow that flows toward the port 1d is generated.

補助翼８は、回転ファン１と共に回転することにより、回転翼１ｃと同様に気流を内周から外周に向ける送風機能を発現する。この流れの向きは、ファンカバー７と回転側板１ｂの間の漏れ循環流れとは逆向きであり、漏れ循環流れにとっては抵抗となるため、漏れ循環流れを低減する効果を生じる。つまり、電動送風機１５の効率を高めることができる。   By rotating together with the rotary fan 1, the auxiliary blade 8 develops an air blowing function that directs the airflow from the inner periphery to the outer periphery in the same manner as the rotary blade 1c. The direction of the flow is opposite to the leakage circulation flow between the fan cover 7 and the rotating side plate 1b, and is resistant to the leakage circulation flow, thereby producing an effect of reducing the leakage circulation flow. That is, the efficiency of the electric blower 15 can be increased.

図４は図３の要部を更に拡大したものである。回転翼１ｃの回転方向に向いた面を回転翼圧力面１ｃａ、対抗する面を回転翼負圧面１ｃｂと呼ぶ。また、補助翼８の回転方向に向いた面を補助翼圧力面８ａ、対抗する面を補助翼負圧面８ｂと呼ぶ。回転翼圧力面１ｃａと隣接する回転翼１ｃの回転翼負圧面１ｃｂとの間の空間である回転ファン１内部の流路では、流れは回転翼圧力面１ｃａ側に偏る。矢印Ｂは回転翼圧力面１ｃａ側から流出する流れを回転場を基準とした相対場で表している。つまり、回転ファン１からの流出は、回転翼圧力面１ｃａに沿うために、回転方向の逆方向に傾いている。そのため、回転側板１ｂとファンカバー７の間の隙間に流れ込む際の周方向位置は、必然的に回転翼１ｃの外周端よりも回転方向後方となる。   FIG. 4 is a further enlarged view of the main part of FIG. The surface of the rotor blade 1c facing the rotation direction is called the rotor blade pressure surface 1ca, and the opposing surface is called the rotor blade negative pressure surface 1cb. Further, the surface facing the rotation direction of the auxiliary blade 8 is referred to as an auxiliary blade pressure surface 8a, and the opposing surface is referred to as an auxiliary blade negative pressure surface 8b. In the flow path inside the rotary fan 1, which is a space between the rotary blade pressure surface 1ca and the rotary blade negative pressure surface 1cb of the adjacent rotary blade 1c, the flow is biased toward the rotary blade pressure surface 1ca. An arrow B represents the flow flowing out from the rotor blade pressure surface 1ca side as a relative field based on the rotation field. That is, the outflow from the rotary fan 1 is inclined in the direction opposite to the rotation direction in order to follow the rotary blade pressure surface 1ca. Therefore, the circumferential position when flowing into the gap between the rotating side plate 1b and the fan cover 7 is inevitably behind the outer peripheral end of the rotary blade 1c in the rotational direction.

本実施の形態では、補助翼８を回転側板１ｂの周縁部の上面に配置するとともに、補助翼８の外周端の位置を、図３の上面図で見て回転翼１ｃの外周端近傍の回転方向後方にずれて位置するように配置している。このため、回転翼１ｃの回転翼圧力面１ｃａに沿って流出した流れが漏れ入るこの位置は、補助翼８の補助翼圧力面８ａとなる。このため、回転側板１ｂとファンカバー７との間の隙間に漏れ入る流れを効果的に低減することができる。   In the present embodiment, the auxiliary blade 8 is arranged on the upper surface of the peripheral edge of the rotating side plate 1b, and the position of the outer peripheral end of the auxiliary blade 8 is rotated in the vicinity of the outer peripheral end of the rotary blade 1c as seen from the top view of FIG. It arrange | positions so that it may shift | deviate and shift to the direction back. For this reason, this position where the flow that flows out along the rotor blade pressure surface 1 ca of the rotor blade 1 c leaks becomes the auxiliary blade pressure surface 8 a of the auxiliary blade 8. For this reason, the flow which leaks into the clearance gap between the rotation side plate 1b and the fan cover 7 can be reduced effectively.

また、図３のＡ−Ａ線に沿う断面をファンカバー７も加えて外周側から見た展開図で示す図５のように、回転側板１ｂからファンカバー７に向かって延出する補助翼８は、回転方向前方に傾けても良い。補助翼８とファンカバー７との間には隙間があり、補助翼圧力面８ａから補助翼負圧面８ｂ側への回りこみ流れが発生する。補助翼８を傾けることにより、回り込み流れを低減し、空力仕事を高めることができる。その結果、補助翼８が循環漏れ流れを低減する効果をより高めることができ、送風効率が向上する。   Further, as shown in FIG. 5 which is a developed view of the section taken along the line A-A in FIG. 3 as viewed from the outer periphery side including the fan cover 7, the auxiliary blade 8 extending from the rotating side plate 1 b toward the fan cover 7. May be tilted forward in the rotational direction. There is a gap between the auxiliary blade 8 and the fan cover 7, and a sneak flow from the auxiliary blade pressure surface 8a to the auxiliary blade negative pressure surface 8b side occurs. By tilting the auxiliary blade 8, the flow around can be reduced and the aerodynamic work can be increased. As a result, the effect of the auxiliary blade 8 reducing the circulation leakage flow can be further enhanced, and the blowing efficiency is improved.

図１、図２ではディフューザー部４を通過した気流が全て戻り風路６を通って内周側へ向きを変える形状を示しているが、静翼５の更に外周側のファンカバーに穴を設けて、モーター２の冷却に必要な流量を越える気流の一部をファンカバーの外へ逃がしても良い。この場合も、補助翼８が漏れ循環流れを低減する効果は変わらず得られる。また、流れを戻り風路６で曲げる際の損失が低減できるので、電動送風機の効率を更に向上させることができる。   1 and 2 show a shape in which all the airflow that has passed through the diffuser portion 4 changes its direction toward the inner peripheral side through the return air passage 6, but a hole is provided in the fan cover on the outer peripheral side of the stationary blade 5. Thus, a part of the airflow exceeding the flow rate necessary for cooling the motor 2 may be released to the outside of the fan cover. Also in this case, the effect of the auxiliary blades 8 reducing the leakage circulation flow can be obtained without change. Moreover, since the loss at the time of bending a flow in the return air path 6 can be reduced, the efficiency of the electric blower can be further improved.

付随して得られる効果について述べる。回転ファン１からの流出は、回転側板１ｂとファンカバー７との間への流入を一要因として、回転主板１ａ側よりも回転側板１ｂ側の方へ偏る。漏れ循環流れを低減することにより、回転ファン１からの流出の回転側板１ｂ側と回転主板１ａ側との間の偏りを抑制することができ、回転ファン１の外周にある静翼５への最大流入速度を低減することができる。その結果、静翼５への衝突損失が低くなり、このことからも電動送風機の効率を高めることができる。   The accompanying effect will be described. The outflow from the rotating fan 1 is biased toward the rotating side plate 1b rather than the rotating main plate 1a due to the inflow between the rotating side plate 1b and the fan cover 7 as one factor. By reducing the leakage circulation flow, the deviation between the rotating side plate 1b side and the rotating main plate 1a side of the outflow from the rotating fan 1 can be suppressed, and the maximum to the stationary blade 5 on the outer periphery of the rotating fan 1 can be suppressed. The inflow speed can be reduced. As a result, the collision loss to the stationary blade 5 is reduced, and the efficiency of the electric blower can be increased from this.

従って、本実施の形態の電動送風機１５によれば、回転ファン１から流出し、回転側板１ｂとファンカバー７との間を通ってファン吸気口１ｄに戻る漏れ循環流れを効果的に低減することができるので、所要動力を低減でき、効率が高い電動送風機を得ることができる。また、補助翼８は、ファンカバー７と接触する構造ではないので、磨耗することがなく、高効率の効果を長期間持続して得ることができる。   Therefore, according to the electric blower 15 of the present embodiment, the leakage circulation flow that flows out of the rotary fan 1 and passes between the rotary side plate 1b and the fan cover 7 and returns to the fan intake port 1d is effectively reduced. Therefore, the required power can be reduced and an electric blower with high efficiency can be obtained. Further, since the auxiliary wing 8 is not structured to come into contact with the fan cover 7, the auxiliary wing 8 is not worn, and a high-efficiency effect can be obtained for a long time.

実施の形態２．
図６は本発明の実施の形態２に係る電動送風機の回転ファンと補助翼の関係を示す上面図であり、図中、前述の実施の形態１のものと同一機能部分には同一符号を付してある。なお、説明にあたっては前述の図１，図４及び図５を参照するものとする。 Embodiment 2. FIG.
FIG. 6 is a top view showing the relationship between the rotating fan and the auxiliary blades of the electric blower according to the second embodiment of the present invention. In the figure, the same reference numerals are given to the same functional parts as those of the first embodiment. It is. In the description, reference is made to FIG. 1, FIG. 4 and FIG.

本実施の形態の電動送風機は、回転翼１ｃの枚数よりも補助翼８の枚数を多くして（ここでは回転翼１ｃの２倍の枚数）、補助翼８が回転側板１ｂとファンカバー７との間の気流を内周から外周に向ける作用を周方向全体に亘って得られるようにした点に特徴を有し、それ以外の構成は前述の実施の形態１のものと同一であり、実施の形態１のもつ機能を全て備えているものである。   In the electric blower of the present embodiment, the number of auxiliary blades 8 is larger than the number of rotating blades 1c (here, twice the number of rotating blades 1c), and the auxiliary blades 8 are connected to the rotary side plate 1b, the fan cover 7, and the like. It is characterized in that the action of directing the air flow between the inner circumference and the outer circumference is obtained over the entire circumferential direction, and the other configuration is the same as that of the first embodiment described above, and It has all the functions of Form 1.

本実施の形態の電動送風機においては、回転ファン１から流出し回転側板１ｂとファンカバー７との間を通ってファン吸気口１ｄに戻る漏れ循環流れをより効果的に低減することができるので、所要動力を更に低減でき、効率が高い電動送風機を得ることができる。また、ここでも補助翼８は、ファンカバー７と接触する構造ではないので、磨耗することがなく、高効率の効果を長期間持続して得ることができる。   In the electric blower of the present embodiment, the leakage circulation flow that flows out from the rotary fan 1 and passes between the rotary side plate 1b and the fan cover 7 and returns to the fan intake port 1d can be reduced more effectively. The required power can be further reduced, and an electric blower with high efficiency can be obtained. Also here, since the auxiliary wing 8 is not structured to contact the fan cover 7, it is not worn and a highly efficient effect can be obtained for a long time.

実施の形態３．
図７は本発明の実施の形態３に係る電動送風機を示す要部断面図であり、図中、前述の実施の形態１のものと同一機能部分には同一符号を付してある。なお、説明にあたっては、ここでも前述の図１，図４及び図５を参照するものとする。 Embodiment 3 FIG.
FIG. 7 is a cross-sectional view of a main part showing an electric blower according to Embodiment 3 of the present invention. In the figure, the same reference numerals are given to the same functional parts as those of Embodiment 1 described above. In the description, reference is also made to FIGS. 1, 4 and 5 described above.

本実施の形態の電動送風機は、ファンカバー７の中央の穴にファンカバースペーサー９を取り付けたものである。   In the electric blower of the present embodiment, a fan cover spacer 9 is attached to the central hole of the fan cover 7.

これを更に詳述すると、ファンカバー７は、回転ファン１とディフューザー部４を内包し、上部中央部に円状に穴が開いており、この円状の穴にファンカバースペーサー９を周方向全体にわたって隙間なく固定保持している。ファンカバースペーサー９の中央には、ベルマウス状にファン吸気口１ｄの内周に回転側板１ｂと僅かな隙間を介して入り込んだスペーサー吸気口９ａが設けられている。ファンカバースペーサー９は、樹脂製であり、ベルマウスを形成する端部の断面を丸くするなどの加工が容易であるために、流入する気流が軸方向から径方向に転向する際の、はく離を抑制し、はく離による損失を低減して、電動送風機１５の効率を高めることができる。それ以外の補助翼８を含む構成は前述の実施の形態１のものと同一であり、実施の形態１のもつ機能を全て備えているものである。   More specifically, the fan cover 7 encloses the rotary fan 1 and the diffuser portion 4 and has a circular hole in the upper central portion. The fan cover spacer 9 is inserted in the circular hole in the entire circumferential direction. It is fixed and held without any gaps. At the center of the fan cover spacer 9, there is provided a spacer air inlet 9a that is in the shape of a bell mouth and enters the inner periphery of the fan air inlet 1d through a slight gap with the rotating side plate 1b. Since the fan cover spacer 9 is made of resin and is easy to process such as rounding the cross section of the end portion forming the bell mouth, the fan cover spacer 9 can be peeled off when the inflowing airflow turns from the axial direction to the radial direction. It can suppress, the loss by peeling can be reduced, and the efficiency of the electric blower 15 can be improved. The other configuration including the auxiliary wing 8 is the same as that of the first embodiment described above, and has all the functions of the first embodiment.

したがって、本実施の形態の電動送風機においても、回転ファン１から流出し回転側板１ｂとファンカバー７との間を通ってファン吸気口１ｄに戻る漏れ循環流れを効果的に低減することができるので、所要動力を低減でき、効率が高い電動送風機１５を得ることができる。また、ここでも補助翼８は、ファンカバー７と接触する構造ではないので、磨耗することがなく、高効率の効果を長期間持続して得ることができる。   Therefore, also in the electric blower of the present embodiment, the leakage circulation flow that flows out from the rotary fan 1 and passes between the rotary side plate 1b and the fan cover 7 and returns to the fan intake port 1d can be effectively reduced. The required power can be reduced, and the electric blower 15 with high efficiency can be obtained. Also here, since the auxiliary blade 8 is not structured to contact the fan cover 7, it is not worn, and a high-efficiency effect can be obtained for a long time.

実施の形態４．
図８は本発明の電動送風機を用いた実施の形態４に係る電気掃除機を示す概略構成図である。なお、説明にあたっては、前述の図１を参照するものとする。 Embodiment 4 FIG.
FIG. 8: is a schematic block diagram which shows the vacuum cleaner which concerns on Embodiment 4 using the electric blower of this invention. In the description, reference is made to FIG.

本実施の形態の電気掃除機は、掃除機本体１０内に、前述の実施の形態１〜３のいずれかの電動送風機１５を備えており、吸引口１１から延長パイプ１２、蛇腹ホース１３を介して気流と共に塵埃を吸引し、吸引した塵埃を集塵ボックス１４内の紙パック内に空気から分離して溜めるものである。
電動送風機１５は、回転ファン１から流出し回転側板１ｂとファンカバーとの間を通ってファン吸気口１ｄに戻る漏れ循環流れを低減した効率が高いものである。
よって本実施の形態の掃除機では、効率が高い掃除機を実現できる。 The electric vacuum cleaner of the present embodiment includes the electric blower 15 of any of the first to third embodiments described above in the vacuum cleaner body 10, and extends from the suction port 11 through the extension pipe 12 and the bellows hose 13. Thus, dust is sucked together with the air flow, and the sucked dust is separated from the air and stored in a paper pack in the dust collection box 14.
The electric blower 15 has high efficiency with reduced leakage circulation flow that flows out from the rotary fan 1 and passes between the rotary side plate 1b and the fan cover and returns to the fan intake port 1d.
Therefore, in the cleaner of this embodiment, a highly efficient cleaner can be realized.

本実施の形態の電気掃除機は、前述の補助翼８を有する電動送風機１５を用いているので、回転ファン１から流出し回転側板１ｂとファンカバー７との間を通ってファン吸気口１ｄに戻る漏れ循環流れをより効果的に低減することができる。このため、送風効率が向上し、高い送風効率を長期間維持することのできる電気掃除機が得られる。   Since the electric vacuum cleaner of the present embodiment uses the electric blower 15 having the auxiliary blades 8 described above, it flows out of the rotating fan 1 and passes between the rotating side plate 1b and the fan cover 7 to the fan intake port 1d. The returning leakage circulation flow can be reduced more effectively. For this reason, ventilation efficiency improves and the vacuum cleaner which can maintain high ventilation efficiency for a long period of time is obtained.

本発明の活用例として、電動送風機としては電気掃除機などの家庭用電化機器はもちろんのこと、液体用ポンプなど産業機器にも適用できる。また電気掃除機としては家庭用、業務用を問わず消費エネルギーを抑えた実用的なものが提供できる。   As an application example of the present invention, the electric blower can be applied not only to household appliances such as a vacuum cleaner but also to industrial equipment such as a liquid pump. Moreover, as a vacuum cleaner, a practical one with reduced energy consumption can be provided for both home use and business use.

１ 回転ファン、１ａ 回転主板、１ｂ 回転側板、１ｃ 回転翼、１ｃａ 回転翼圧力面、１ｃｂ 回転翼負圧面、１ｄ ファン吸気口、２ モーター、３ シャフト、４ ディフューザー部、５ 静翼、６ 戻り風路、７ ファンカバー、７ａ ファンカバー吸気口、８ 補助翼、８ａ 補助翼圧力面、８ｂ 補助翼負圧面、９ ファンカバースペーサー、９ａ スペーサー吸気口、１０ 掃除機本体、１１ 吸引口、１２ 延長パイプ、１３ 蛇腹ホース、１４ 集塵ボックス、１５ 電動送風機。   1 Rotating fan, 1a Rotating main plate, 1b Rotating side plate, 1c Rotating blade, 1ca Rotating blade pressure surface, 1cb Rotating blade negative pressure surface, 1d Fan intake port, 2 Motor, 3 Shaft, 4 Diffuser section, 5 Stator blade, 6 Return air Road, 7 Fan cover, 7a Fan cover intake port, 8 Auxiliary wing, 8a Auxiliary blade pressure surface, 8b Auxiliary blade negative pressure surface, 9 Fan cover spacer, 9a Spacer intake port, 10 Vacuum cleaner body, 11 Suction port, 12 Extension pipe , 13 bellows hose, 14 dust collection box, 15 electric blower.

Claims (7)

中央部にファン吸気口を有する回転側板、この回転側板に対向する平板状の回転主板、及びこれら回転側板と回転主板との間に設けられた複数枚の回転翼、を有する回転ファンと、
前記回転ファンがシャフトに固定されたモーターと、
前記回転ファンが吐出した気流を減速、静圧回復させるディフューザー部と、
前記回転ファンと前記ディフューザー部を内包し中央部に前記ファン吸気口と僅かな隙間を介して該ファン吸気口の内側に入り込んだファンカバー吸気口を有するファンカバーと、
前記回転側板と前記ファンカバーとの間に配置されて前記回転ファンと共に回転し、弦長が前記回転翼よりも短い複数の補助翼と、
を備えることを特徴とする電動送風機。 A rotating fan having a rotating side plate having a fan inlet in the center, a flat rotating main plate facing the rotating side plate, and a plurality of rotating blades provided between the rotating side plate and the rotating main plate;
A motor in which the rotating fan is fixed to a shaft;
A diffuser section for decelerating and restoring static pressure of the air flow discharged by the rotary fan;
A fan cover having a fan cover intake opening that encloses the rotating fan and the diffuser portion and enters the inside of the fan intake opening through a slight gap with the fan intake opening in the center portion;
A plurality of auxiliary blades disposed between the rotating side plate and the fan cover and rotating together with the rotating fan, and having a chord length shorter than the rotating blades;
An electric blower comprising: 中央部にファン吸気口を有する回転側板、この回転側板と対向する平板状の回転主板、及びこれら回転側板と回転主板との間に設けられた複数枚の回転翼、を有する回転ファンと、
前記回転ファンがシャフトに固定されたモーターと、
前記回転ファンが吐出した気流を減速、静圧回復させるディフューザー部と、
前記回転ファンと前記ディフューザー部を内包し、中央に穴が開いたファンカバーと、
前記ファンカバーの中央の穴に全周にわたり隙間なく固定保持され、中央部に前記ファン吸気口と僅かな隙間を介して該ファン吸気口の内側に入り込んだスペーサー吸気口を有する樹脂製のファンカバースペーサーと、
前記回転側板と前記ファンカバーとの間に配置されて前記回転ファンと共に回転し、弦長が前記回転翼よりも短い複数の補助翼と、
を備えることを特徴とする電動送風機。 A rotating fan having a rotating side plate having a fan inlet in the center, a flat rotating main plate facing the rotating side plate, and a plurality of rotating blades provided between the rotating side plate and the rotating main plate;
A motor in which the rotating fan is fixed to a shaft;
A diffuser section for decelerating and restoring static pressure of the air flow discharged by the rotary fan;
A fan cover including the rotary fan and the diffuser, and having a hole in the center;
A resin fan cover having a spacer air inlet that is fixedly held in the central hole of the fan cover over the entire circumference without any gap, and that enters the inside of the fan air inlet through the slight gap with the fan air inlet. Spacers,
A plurality of auxiliary blades disposed between the rotating side plate and the fan cover and rotating together with the rotating fan, and having a chord length shorter than the rotating blades;
An electric blower comprising: 前記補助翼は、その回転ファン軸線方向から見た外周端のファン中心からの距離が、前記回転翼の外周端のファン中心からの距離と略一致するように、前記回転側板の周縁部に配置されていることを特徴とする請求項１又は請求項２記載の電動送風機。   The auxiliary blades are arranged on the peripheral portion of the rotary side plate so that the distance from the fan center at the outer peripheral end of the auxiliary blade viewed from the axial direction of the rotary fan substantially coincides with the distance from the fan center at the outer peripheral end of the rotary blade. The electric blower according to claim 1, wherein the electric blower is provided. 前記補助翼は、その枚数が、前記回転翼の枚数よりも多いことを特徴とする請求項１乃至請求項３のいずれかに記載の電動送風機。   The electric blower according to any one of claims 1 to 3, wherein the number of the auxiliary blades is larger than the number of the rotary blades. 前記補助翼は、その回転ファン軸線方向から見た外周端の位置が、前記回転翼の外周端近傍の回転方向後方に位置するように配置されていることを特徴とする請求項１乃至請求項４のいずれかに記載の電動送風機。   2. The auxiliary blade is arranged such that a position of an outer peripheral end thereof viewed from an axial direction of the rotating fan is positioned rearward in the rotation direction near the outer peripheral end of the rotating blade. The electric blower according to any one of 4. 前記補助翼は、前記回転側板から前記ファンカバーに向かって延出し、かつ回転方向前方に傾斜していることを特徴とする請求項１乃至請求項５のいずれかに記載の電動送風機。   The electric blower according to any one of claims 1 to 5, wherein the auxiliary wing extends from the rotating side plate toward the fan cover and is inclined forward in the rotating direction. 請求項１乃至請求項６のいずれかに記載の電動送風機を用いた電気掃除機。   The vacuum cleaner using the electric blower in any one of Claims 1 thru | or 6.
JP2009113716A 2009-05-08 2009-05-08 Electric blower and vacuum cleaner using the same Pending JP2010261392A (en)

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN112032103A (en) * 2019-06-03 2020-12-04 日本电产株式会社 Impeller, air supply device and dust collector
CN112594212A (en) * 2020-12-09 2021-04-02 江苏美的清洁电器股份有限公司 Impeller, fan and dust catcher

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JP2005113765A (en) * 2003-10-07 2005-04-28 Matsushita Electric Ind Co Ltd Electrical blower and electrical vacuum cleaner using the same
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JPH04179899A (en) * 1990-11-14 1992-06-26 Matsushita Electric Ind Co Ltd Electric blower
JPH05332293A (en) * 1992-06-03 1993-12-14 Nippondenso Co Ltd Multi-blade blower
JPH0979189A (en) * 1995-09-14 1997-03-25 Matsushita Electric Ind Co Ltd Motor-driven air blower
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112032103A (en) * 2019-06-03 2020-12-04 日本电产株式会社 Impeller, air supply device and dust collector
CN112594212A (en) * 2020-12-09 2021-04-02 江苏美的清洁电器股份有限公司 Impeller, fan and dust catcher

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