JP2008303793A - Electric air blower and vacuum cleaner using this electric air blower - Google Patents

Electric air blower and vacuum cleaner using this electric air blower Download PDF

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Publication number
JP2008303793A
JP2008303793A JP2007151937A JP2007151937A JP2008303793A JP 2008303793 A JP2008303793 A JP 2008303793A JP 2007151937 A JP2007151937 A JP 2007151937A JP 2007151937 A JP2007151937 A JP 2007151937A JP 2008303793 A JP2008303793 A JP 2008303793A
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Japan
Prior art keywords
fan
electric blower
noise
vacuum cleaner
air blower
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Pending
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JP2007151937A
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Japanese (ja)
Inventor
Takeshi Oshikiri
剛 押切
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Toshiba Corp
Toshiba Lifestyle Products and Services Corp
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Toshiba Corp
Toshiba Consumer Electronics Holdings Corp
Toshiba Home Appliances Corp
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Application filed by Toshiba Corp, Toshiba Consumer Electronics Holdings Corp, Toshiba Home Appliances Corp filed Critical Toshiba Corp
Priority to JP2007151937A priority Critical patent/JP2008303793A/en
Priority to KR1020080052572A priority patent/KR20080108021A/en
Priority to EP08251979A priority patent/EP2000070B1/en
Priority to CNA2008101083063A priority patent/CN101319682A/en
Priority to RU2008122877/12A priority patent/RU2388400C2/en
Publication of JP2008303793A publication Critical patent/JP2008303793A/en
Pending legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/22—Mountings for motor fan assemblies
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/0081—Means for exhaust-air diffusion; Means for sound or vibration damping
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • 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
    • 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
    • F04D29/288—Part of the wheel having an ejecting effect, e.g. being bladeless diffuser
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes

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

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric air blower and a vacuum cleaner capable of restraining or reducing an abnormal sound in a low air volume and high vacuum area. <P>SOLUTION: This electric air blower has a centrifugal fan installed on a rotary shaft of an electric motor and having a plurality of fan blades, and a diffuser having a plurality of diffuser blades positioned on the outer periphery of the centrifugal fan oppositely to a delivery port formed on a peripheral surface of this centrifugal fan. In this electric air blower, the tip of the fan blades is inclined in a substantially straight line shape toward the other side end from one side end. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は電動送風機及びこれを用いた電気掃除機に係り、特にファンブレードの形状を改良した電動送風機及びこれを用いた電気掃除機に関する。   The present invention relates to an electric blower and an electric vacuum cleaner using the electric blower, and more particularly to an electric blower having an improved fan blade shape and an electric vacuum cleaner using the electric blower.

一般に電気掃除機は、掃除機本体内に電動送風機及び集塵手段を有し、電動送風機の吸引力により被掃除面から塵埃を空気と共に吸引し、集塵手段で塵埃と空気とを分離して塵埃を集塵手段内に蓄積し、塵埃が分離された清浄な空気を掃除機本体外部に排気する。   Generally, an electric vacuum cleaner has an electric blower and dust collecting means in the main body of the vacuum cleaner, and sucks dust together with air from the surface to be cleaned by the suction force of the electric blower and separates the dust and air by the dust collecting means. Dust is accumulated in the dust collecting means, and clean air from which the dust is separated is exhausted to the outside of the cleaner body.

電動送風機は、モータとこのモータにより回転されるファンからなり、ファンには、遠心型が用いられ、遠心ファンから排出された空気を整流するディフューザを備える。   The electric blower includes a motor and a fan rotated by the motor. The fan is a centrifugal type and includes a diffuser that rectifies air discharged from the centrifugal fan.

電気掃除機に用いる電動送風機には、特に騒音の低減が求められる。   The electric blower used for the vacuum cleaner is particularly required to reduce noise.

この低音対策として、図１１に示すように、ファンブレード５２の外径がファンプレート５３の外径よりも小さい遠心ファン５１が提案されている。しかしながら、この遠心ファン５１は通常の運転において、ファンブレードの外径とファンプレートの外径が等しい一般的な遠心ファンに比べて、聴感に優れるが、低風量かつ高真空域において異音を発生することがあった。   As a measure against this low sound, as shown in FIG. 11, a centrifugal fan 51 is proposed in which the outer diameter of the fan blade 52 is smaller than the outer diameter of the fan plate 53. However, this centrifugal fan 51 is more audible than normal centrifugal fans in which the outer diameter of the fan blade is equal to the outer diameter of the fan plate in normal operation, but generates abnormal noise in a low air volume and high vacuum range. There was something to do.

なお、遠心ファンから発生する高周波音を抑制するために、外周方向に傾斜するディフューザを設けた電動送風機が提案されている（例えば、特許文献１参照）。
特開２００２−１１５６９８号公報 In addition, in order to suppress the high frequency sound which generate | occur | produces from a centrifugal fan, the electric blower provided with the diffuser inclined in the outer peripheral direction is proposed (for example, refer patent document 1).
JP 2002-115698 A

本発明は上述した事情を考慮してなされたもので、低風量かつ高真空域において異音の発生を抑制あるいは異音を低減できる電動送風機及びこれを用いた電気掃除機を提供することを目的とする。   The present invention has been made in consideration of the above-described circumstances, and an object thereof is to provide an electric blower capable of suppressing or reducing abnormal noise in a low air volume and high vacuum range, and an electric vacuum cleaner using the same. And

上述した目的を達成するため、本発明に係る電動送風機は、電動機の回転軸に取付けられ、複数枚のファンブレードを有する遠心ファンと、この遠心ファンの周面に形成された吐出口に対向して前記遠心ファンの外周に位置する複数枚のディフューザブレードを有するディフューザを備えた電動送風機において、前記ファンブレードの先端は一側端から他側端に向かってほぼ直線状に傾斜することを特徴とする。   In order to achieve the above-described object, an electric blower according to the present invention is mounted on a rotating shaft of an electric motor and faces a centrifugal fan having a plurality of fan blades and a discharge port formed on the peripheral surface of the centrifugal fan. In the electric blower provided with a diffuser having a plurality of diffuser blades located on the outer periphery of the centrifugal fan, the tip of the fan blade is inclined substantially linearly from one end to the other end. To do.

また、本発明に係る電気掃除機は、本体内に上記電動送風機を収容したことを特徴とする。   The electric vacuum cleaner according to the present invention is characterized in that the electric blower is accommodated in the main body.

本発明に係る電動送風機によれば、低風量かつ高真空域において異音の発生を抑制あるいは異音を低減できる電動送風機を提供することができる。   According to the electric blower according to the present invention, it is possible to provide an electric blower that can suppress the generation of abnormal noise or reduce the abnormal noise in a low air volume and high vacuum range.

また、本発明に係る電気掃除機によれば、低風量かつ高真空域において異音の発生を抑制あるいは異音を低減できる電気掃除機を提供することができる。   Moreover, according to the vacuum cleaner which concerns on this invention, the vacuum cleaner which can suppress generation | occurrence | production of unusual noise in a low air volume and a high vacuum area, or can reduce unusual noise can be provided.

本発明の一実施形態に係る電動送風機を図面を参照して説明する。   An electric blower according to an embodiment of the present invention will be described with reference to the drawings.

図１は本発明の一実施形態の電動送風機の構成を一部切り欠いて示す側面図である。   FIG. 1 is a side view showing a partially cutaway configuration of an electric blower according to an embodiment of the present invention.

図１に示すように、電動送風機１は、金属製の遠心ファン２と、この遠心ファン２を回転軸３を介して回転させるモータ４と、これらを収納するケース５とで構成される。   As shown in FIG. 1, the electric blower 1 includes a metal centrifugal fan 2, a motor 4 that rotates the centrifugal fan 2 via a rotating shaft 3, and a case 5 that houses them.

このケース５は、遠心ファン２を覆うファンカバー６と、モータ４を収納するモータケース７とから構成される。   The case 5 includes a fan cover 6 that covers the centrifugal fan 2 and a motor case 7 that houses the motor 4.

モータ４は例えば、ブラシ付きモータを用い、モータケース７は、後板部１１による有底状構造でファンカバー６側が開口部１２として開口し、モータ４を収納する。   For example, a motor with a brush is used as the motor 4, and the motor case 7 has a bottomed structure formed by the rear plate portion 11, and the fan cover 6 side is opened as the opening portion 12 to store the motor 4.

また、モータケース７の軸方向の後面側の後板部１１の中央部が後方に向けて略円筒状に突出し、内側にベアリング１２ａを収容するベアリング収納部１２ｂが設けられる。   Further, the central portion of the rear plate portion 11 on the rear side in the axial direction of the motor case 7 protrudes rearward in a substantially cylindrical shape, and a bearing housing portion 12b for housing the bearing 12a is provided inside.

このモータケース７の開口部１２側を閉塞するように、フレーム８がモータケース７に、回転軸３に垂直になるように、ネジ等により取り付けられる。   The frame 8 is attached to the motor case 7 with screws or the like so as to be perpendicular to the rotating shaft 3 so as to close the opening 12 side of the motor case 7.

このフレーム８は、モータケース７よりも外周が小さいブリッジ形状である。ファンカバー６の内周側下端部が一体化され、電動送風機１のケース５が形成される。   The frame 8 has a bridge shape whose outer periphery is smaller than that of the motor case 7. The lower end portion on the inner peripheral side of the fan cover 6 is integrated, and the case 5 of the electric blower 1 is formed.

なお、モータケース７、フレーム８およびファンカバー６の内周の大きさは、同じであってもよい。このフレーム８の略中央には、前方に向けて略円筒状に突出し、回転軸３用の貫通孔（図示しない）が開口形成されたベアリング収納部１３ｂが設けられている。このベアリング収納部１３ｂにベアリング１３ａが収納される。   The sizes of the inner circumferences of the motor case 7, the frame 8, and the fan cover 6 may be the same. Near the center of the frame 8 is provided a bearing housing portion 13b that protrudes forward in a substantially cylindrical shape and has a through hole (not shown) for the rotating shaft 3 formed therein. The bearing 13a is stored in the bearing storage portion 13b.

さらに、ファンカバー６により遠心ファン２やディフューザ２１が覆われている。このファンカバー６は、前面の中央部に遠心ファン２の空気吸込口３１に対向する吸込開口部６ａを有するとともに、後面の全面に後部開口部（図示せず）が形成され、全体では略円筒状に形成されている。   Further, the centrifugal fan 2 and the diffuser 21 are covered by the fan cover 6. The fan cover 6 has a suction opening 6a facing the air suction port 31 of the centrifugal fan 2 at the center of the front surface, and a rear opening (not shown) is formed on the entire rear surface. It is formed in a shape.

一方、モータ４は、モータケース７に固定されたステータ１５と、このステータ１５の内側に配置されたロータ１６とにより構成されている。このロータ１６の中心の回転軸３の両端部がベアリング１２ａ、１３ａにより回転自在に軸支されている。さらに、モータケース７の後面近傍の周面には、略径方向に位置させて排気口としての吹出口（図示せず）が開口形成されている。   On the other hand, the motor 4 includes a stator 15 fixed to the motor case 7 and a rotor 16 disposed inside the stator 15. Both ends of the rotation shaft 3 at the center of the rotor 16 are rotatably supported by bearings 12a and 13a. Further, an air outlet (not shown) as an exhaust port is formed in the peripheral surface near the rear surface of the motor case 7 so as to be positioned substantially in the radial direction.

また、フレーム８の吸込前方側には、ディフューザ２１が固定される。   Further, the diffuser 21 is fixed to the suction front side of the frame 8.

図２（ａ）に示すように、ディフューザ２１は、略円板上の円板部２２と、この円板部２２の略中心に形成されて回転軸３が貫通する貫通孔２３と、フレーム８にネジで固定するためのネジ孔２４ａ、２４ｂと、ファン２の外周部に位置するようにディフューザ２１の外周縁部寄りに立設された複数の円弧状ブレード２５と、図２（ｂ）に示すように円板部２２の他面側である裏面に渦巻状に立設された複数の円弧状ブレード２６とを備えている。   As shown in FIG. 2A, the diffuser 21 includes a disk part 22 on a substantially disk, a through hole 23 formed at a substantially center of the disk part 22 through which the rotary shaft 3 passes, and a frame 8. Screw holes 24a and 24b for fixing to the outer periphery of the fan 2, a plurality of arcuate blades 25 erected near the outer peripheral edge of the diffuser 21 so as to be positioned on the outer periphery of the fan 2, and FIG. As shown, a plurality of arcuate blades 26 erected in a spiral shape are provided on the back surface which is the other surface side of the disk portion 22.

そして、ディフューザ２１は、フレーム８に対向してこのフレーム８のベアリング収納部１２ｂの外周に嵌挿され、フレーム８にネジで固定される。   The diffuser 21 is fitted into the outer periphery of the bearing housing portion 12b of the frame 8 so as to face the frame 8, and is fixed to the frame 8 with screws.

図３〜図５に示すように、遠心ファン２は空気吸込口３１側の前側プレート３２と、この前側プレート３２と同一直径を有し、これに対向して設けた後側プレート３３間に設けられる複数のファンブレード３４から構成される。   As shown in FIGS. 3 to 5, the centrifugal fan 2 has a front plate 32 on the side of the air suction port 31 and a rear plate 33 having the same diameter as the front plate 32 and provided opposite thereto. And a plurality of fan blades 34.

ファンブレード３４には複数の取付突部３４ａが設けられ、この取付突部３４ａを、前側プレート３２と後側プレート３３に設けられた取付孔３２ａ、３３ａに嵌合しカシメられ、ファンブレード３４が、前側プレート３２と後側プレート３３でサンドイッチされた状態でそれぞれが固定される。   The fan blade 34 is provided with a plurality of mounting protrusions 34a. The mounting protrusions 34a are fitted into the mounting holes 32a and 33a provided in the front side plate 32 and the rear side plate 33 and crimped. The front plate 32 and the rear plate 33 are fixed in a sandwiched state.

空気吸込口３１は、前側プレート３２の中央に形成され、吐出口３５は、前側プレート３２と後側プレート３３の外周端３２ｂ、３３ｂ間に形成される。   The air suction port 31 is formed at the center of the front plate 32, and the discharge port 35 is formed between the outer peripheral ends 32 b and 33 b of the front plate 32 and the rear plate 33.

ファンブレード３４の先端３４ｂは、一側端３４ｂ１が前側プレート３２の外周端３２ａの内側（ファン軸芯側）に位置し、他側端３４ｂ２が後側プレート３３の外周端３３ｂの内側に位置し、他側端３４ｂ２が一側端３４ｂ１よりもファン軸芯側に位置するように、一側端３４ｂ１から他側端３４ｂ２に向かって直線状に傾斜している。 The front end 34 b of the fan blade 34 has one side end 34 b 1 positioned on the inner side (fan axis side) of the outer peripheral end 32 a of the front plate 32, and the other side end 34 b 2 positioned on the inner side of the outer peripheral end 33 b of the rear plate 33. position and, as the other end 34b 2 is located to the fan axis side than the one side edge 34b 1, are inclined linearly toward the one side end 34b 1 to the other end 34b 2.

従って、図４に示すように、前側プレート３２の直径ｄ１、後側プレート３３の直径ｄ２、一側端３４ｂ１が位置する円の直径ｄ３、他側端３４ｂ２が位置する円の直径ｄ４とすると、ｄ１＝ｄ２、ｄ１＞ｄ３、ｄ３＞ｄ４となる。 Accordingly, as shown in FIG. 4, the diameter d2 of the diameter d1, the rear plate 33 of the front plate 32, a circle of diameter d3 which one end 34b 1 is located, the diameter d4 of a circle other end 34b 2 are located Then, d1 = d2, d1> d3, and d3> d4.

なお、先端は本実施形態のように直線状に限らず、曲線状あるいは曲線と直線の組み合わせ、直線と直線との組み合わせによりほぼ直線状になっていればよい。   Note that the tip is not limited to a straight line as in the present embodiment, but may be a straight line by a curved line, a combination of a curved line and a straight line, or a combination of a straight line and a straight line.

上記構成において、電動送風機１は回転軸３が回転すると、この回転に伴って遠心ファン２が回転し、この回転によって空気が吸引される。この空気は、ファンカバー６の前面側に形成された吸込開口部６ａから遠心ファン２を通り、吐出口３５から吹き出される。そして、この空気は、ファンカバー６の内周面に沿って円弧状ブレード２５の間を、軸方向に広がるように流れる。さらに、この空気は、円板部２２裏面において、円弧状ブレード２６の間を渦巻状にディフューザ２１の中心に向けて流れる。このようにして、ディフューザ２１は、遠心ファン２の吐出口３５から吹き出される空気を、一様に整流させ、モータ４へと導く。モータ４に導かれた空気はモータ４を冷却した後、モータケース７外に排出される。   In the above configuration, when the rotating shaft 3 rotates in the electric blower 1, the centrifugal fan 2 rotates along with this rotation, and air is sucked by this rotation. This air passes through the centrifugal fan 2 from the suction opening 6 a formed on the front surface side of the fan cover 6 and is blown out from the discharge port 35. The air flows so as to spread in the axial direction between the arc-shaped blades 25 along the inner peripheral surface of the fan cover 6. Further, the air flows spirally between the arc-shaped blades 26 toward the center of the diffuser 21 on the back surface of the disk portion 22. In this way, the diffuser 21 uniformly rectifies the air blown from the discharge port 35 of the centrifugal fan 2 and guides it to the motor 4. The air guided to the motor 4 is discharged outside the motor case 7 after cooling the motor 4.

本電動送風機は本発明者らが行った試験によれば、騒音がファンブレードとファンプレートの外径が等しい一般的なファンの電動送風機に比べて小さく、静かであり、また、回転数を変化させるために電圧を変化させても、騒音がファンブレードとファンプレートの外径が等しい一般的なファンに比べて小さく、静かである。また、ファンブレード３４の先端３４ｂを一側端３４ｂ１から他側端３４ｂ２に向かって直線状に傾斜させることで、低風量かつ高真空域で異音の低減を図ることができるので安価で量産性に適する。 According to the tests conducted by the present inventors, the electric blower is smaller and quieter than a general fan electric blower in which the outer diameters of the fan blade and the fan plate are equal, and the rotational speed is changed. Even if the voltage is changed, the noise is smaller and quieter than that of a general fan having the same fan blade and fan plate outer diameters. Further, by inclining linearly toward the distal end 34b of the fan blades 34 from one side edge 34b 1 to the other end 34b 2, inexpensive since it is possible to abnormal noise reduction at low air volume and high vacuum region Suitable for mass production.

本実施形態の電動送風機によれば、低風量かつ高真空域において異音の発生を抑制あるいは異音を低減できる電動送風機が実現する。   According to the electric blower of the present embodiment, an electric blower that can suppress the generation of abnormal noise or reduce the abnormal noise in a low air volume and high vacuum range is realized.

図６に示すように、本発明の電動送風機１は、電気掃除機４１の掃除機本体４２に組み込まれ、電動送風機１の風上側には遠心分離方式の集塵部４３ａとプリーツ状の集塵フィルタ４３ｂからなる集塵手段４３が配される。掃除機本体４２の集塵手段４３の風上側にはホース４４、延長管４５、ノズル４６が接続される。   As shown in FIG. 6, the electric blower 1 of the present invention is incorporated in the vacuum cleaner body 42 of the electric vacuum cleaner 41, and a centrifugal dust collection portion 43 a and a pleated dust collection are provided on the windward side of the electric blower 1. A dust collecting means 43 comprising a filter 43b is arranged. A hose 44, an extension pipe 45, and a nozzle 46 are connected to the windward side of the dust collecting means 43 of the cleaner body 42.

本発明の電動送風機１を組み込んだ電気掃除機４１は、低風量かつ高真空域すなわち集塵手段４３に溜まる塵埃により、通風流路の面積が狭められても、異音の発生を抑制あるいは異音を低減できて静かであり、また、電圧を変化させても静かである。   The vacuum cleaner 41 incorporating the electric blower 1 of the present invention suppresses generation or generation of abnormal noise even when the area of the ventilation passage is narrowed by dust that accumulates in the low air volume and high vacuum region, that is, the dust collecting means 43. The sound can be reduced and it is quiet, and even if the voltage is changed, it is quiet.

また、本発明に係る電気掃除機によれば、低風量かつ高真空域において異音の発生を抑制あるいは異音を低減できる電気掃除機が実現する。   Moreover, according to the vacuum cleaner which concerns on this invention, the vacuum cleaner which can suppress generation | occurrence | production of unusual noise in a low air volume and a high vacuum area, or can reduce unusual noise is implement | achieved.

図１に示す本発明の電動送風機（実施例）を用いて、低風量時及び最大風量時の騒音を測定し、図１１に示す従来の電動送風機（比較例）と比較する。   Using the electric blower (Example) of the present invention shown in FIG. 1, the noise at the time of low air flow and the maximum air flow is measured and compared with the conventional electric blower (Comparative Example) shown in FIG.

（１）試験条件
１）風量：低風量実現状態（真空度：大）、最大風量実現状態（真空度：小）
２）測定方法：最大風量実現状態ではモータをウレタンの上にカーボンが水平になるように置く。
低風量時ではモータをラッパ管にカーボンが水平になるようにセットする。
マイクはモータ全長の中心の真上１ｍのところにセットする。電圧１００ＶのときにＱ＝１．３ｍ３／ｍｉｎになるように弁角度を低風量実現状態に調整し、その角度のまま騒音測定を行う。
真空度の測定はファンの上流部分で行う。 (1) Test conditions 1) Airflow: Low airflow realization state (vacuum degree: large), Maximum airflow realization state (vacuum degree: small)
2) Measuring method: When the maximum airflow is achieved, place the motor on the urethane so that the carbon is horizontal.
When the air volume is low, set the motor on the trumpet so that the carbon is horizontal.
Set the microphone 1m right above the center of the motor. The valve angle is adjusted to a low air volume realization state so that Q = 1.3 m 3 / min when the voltage is 100 V, and noise measurement is performed with that angle.
The vacuum is measured at the upstream part of the fan.

３）測定環境：気温２４℃、湿度４８％、気圧７２９ｍｍＨｇ   3) Measurement environment: temperature 24 ° C, humidity 48%, atmospheric pressure 729mmHg

（２）結果
１）低風量実現状態：表１及び図７に示す。

Figure 2008303793
(2) Results 1) Low airflow realization state: as shown in Table 1 and FIG.
Figure 2008303793

表１からもわかるように、低風量実現状態の電圧４０、Ｑ＝０．７６ｍ３／ｍｉｎでは実施例の騒音が８１．１ｄＢ（Ａ）であるのに対して、比較例は８３．４ｄＢ（Ａ）であり、電圧６０、Ｑ＝０．９９ｍ３／ｍｉｎでは実施例の騒音が８９．５ｄＢ（Ａ）であるのに対して、比較例は９１．８ｄＢ（Ａ）であり、電圧８０、Ｑ＝１．１６ｍ３／ｍｉｎでは実施例の騒音が８８．３ｄＢ（Ａ）であるのに対して、比較例は９０．８ｄＢ（Ａ）であり、電圧１００、Ｑ＝１．３ｍ３／ｍｉｎでは実施例の騒音が９６．１ｄＢ（Ａ）であるのに対して、比較例は９４．５ｄＢ（Ａ）であり、低風量実現状態（Ｑ＝０．７６−１．３ｍ３／ｍｉｎ）では、実施例が比較例に比べて騒音値が小さく静かであることがわかった。 As can be seen from Table 1, the noise of the example is 81.1 dB (A) at a voltage 40 and Q = 0.76 m 3 / min in the low air volume realization state, whereas the comparative example is 83.4 dB ( A), the noise of the example is 89.5 dB (A) at a voltage of 60 and Q = 0.99 m 3 / min, whereas the comparative example is 91.8 dB (A), and the voltage of 80, At Q = 1.16 m 3 / min, the noise of the example is 88.3 dB (A), whereas the comparative example is 90.8 dB (A), voltage 100, Q = 1.3 m 3 / min. Then, while the noise of the example is 96.1 dB (A), the comparative example is 94.5 dB (A), and in the low air volume realization state (Q = 0.76-1.3 m 3 / min). It was found that the noise level of the example was smaller and quieter than that of the comparative example.

また、図７からもわかるように、低風量実現状態において、回転数を変化させるために電圧を変化させても、実施例が比較例に比べてほぼ全域に渡って騒音値が小さく静かであることがわかった。   Further, as can be seen from FIG. 7, even when the voltage is changed in order to change the rotation speed in the low air volume realization state, the noise level is small and quiet over almost the whole area as compared with the comparative example. I understood it.

さらに、図８に示すように、低風量実現状態での電圧６０Ｖにおける騒音の周波数と騒音値の相関測定では、ほぼ全周波数に渡って、騒音は実施例が比較例に比べて小さいことがわかった。   Furthermore, as shown in FIG. 8, in the measurement of the correlation between the noise frequency and the noise value at a voltage of 60 V in the low air volume realization state, it is found that the noise is smaller in the embodiment than in the comparative example over almost all frequencies. It was.

特に１０ＫＨｚ以上のピークのでている周波数において、騒音値は実施例が比較例に比べて明らかに小さいので、異音の発生あるいは異音の低減がなされていることがわかる。   In particular, at a frequency having a peak of 10 KHz or more, the noise value is clearly smaller in the example than in the comparative example, so that it can be seen that abnormal noise is generated or reduced.

２）最大風量実現状態：表２及び図９に示す。

Figure 2008303793
2) Maximum air volume realization state: as shown in Table 2 and FIG.
Figure 2008303793

表２からもわかるように、最大風量実現状態の電圧４０、Ｑ＝１．６８ｍ３／ｍｉｎでは実施例の騒音が８２．１ｄＢ（Ａ）であるのに対して、比較例は８１．６ｄＢ（Ａ）であり、電圧６０、Ｑ＝２．１８ｍ３／ｍｉｎでは実施例の騒音が８７．６ｄＢ（Ａ）であるのに対して、比較例は８８．２ｄＢ（Ａ）であり、電圧８０、Ｑ＝２．６２ｍ３／ｍｉｎでは実施例の騒音が８９．６ｄＢ（Ａ）であるのに対して、比較例は８９．６ｄＢ（Ａ）であり、電圧１００、最大風量Ｑ＝３．００ｍ３／ｍｉｎでは実施例の騒音が９２．０ｄＢ（Ａ）であるのに対して、比較例は９１．６ｄＢ（Ａ）であり、最大風量実現状態（Ｑ＝１．６８−３．００ｍ３／ｍｉｎ）では、回転数を変化させるために電圧を変化させても、実施例と比較例の騒音値は大差がない。 As can be seen from Table 2, the noise of the example is 82.1 dB (A) at the voltage 40 and Q = 1.68 m 3 / min in the maximum air volume realization state, whereas the comparative example is 81.6 dB ( A), and at a voltage of 60 and Q = 2.18 m 3 / min, the noise of the example is 87.6 dB (A), whereas the comparative example is 88.2 dB (A), and the voltage of 80, At Q = 2.62 m 3 / min, the noise of the example is 89.6 dB (A), whereas the comparative example is 89.6 dB (A), and the voltage is 100 and the maximum air volume Q is 3.00 m 3. The noise of the example is 92.0 dB (A) at / min, whereas the comparative example is 91.6 dB (A), and the maximum air volume realization state (Q = 1.68−3.00 m 3 / min). ), Even if the voltage is changed to change the rotational speed, There is no big difference in noise level.

また、図９からもわかるように、最大風量実現状態の全域において、実施例と比較例の騒音値は大差がない。   In addition, as can be seen from FIG. 9, the noise values of the example and the comparative example are not significantly different in the entire range of the maximum air volume realization state.

さらに、図１０に示すように、最大風量実現状態の電圧６０Ｖにおける騒音の周波数と騒音値の相関測定では、ほぼ全周波数に渡って、騒音は実施例と比較例で大差がない。   Furthermore, as shown in FIG. 10, in the correlation measurement between the noise frequency and the noise value at the voltage of 60 V in the maximum air volume realization state, the noise is not greatly different between the example and the comparative example over almost all frequencies.

本発明の一実施形態の電動送風機の構成を一部切り欠いて示す側面図。The side view which cuts and shows a part of structure of the electric blower of one Embodiment of this invention. 本発明の一実施形態の電動送風機に用いるディフューザの構成例を示し、（ａ）は平面図、（ｂ）は底面図。The structural example of the diffuser used for the electric blower of one Embodiment of this invention is shown, (a) is a top view, (b) is a bottom view. 本発明の一実施形態の電動送風機に用いる遠心ファンの概念図。The conceptual diagram of the centrifugal fan used for the electric blower of one Embodiment of this invention. 本発明の一実施形態の電動送風機に用いる遠心ファンの縦断面図。The longitudinal cross-sectional view of the centrifugal fan used for the electric blower of one Embodiment of this invention. 本発明の一実施形態の電動送風機に用いる遠心ファンのファンブレードの平面図。The top view of the fan blade of the centrifugal fan used for the electric blower of one Embodiment of this invention. 本発明の一実施形態の電気掃除機の概念図。The conceptual diagram of the vacuum cleaner of one Embodiment of this invention. 本発明の一実施形態の電動送風機を用いた騒音試験結果の電圧−騒音レベル線図（低風量実現状態）。The voltage-noise level diagram (low airflow realization state) of the noise test result using the electric blower of one Embodiment of this invention. 本発明の一実施形態の電動送風機を用いた騒音試験結果の周波数−騒音値線図（低風量実現状態）。The frequency-noise value diagram of the noise test result using the electric blower of one embodiment of the present invention (low air volume realization state). 本発明の一実施形態の電動送風機を用いた騒音試験結果の電圧−騒音レベル線図（最大風量実現状態）。The voltage-noise level diagram of the noise test result using the electric blower of one embodiment of the present invention (maximum air volume realization state). 本発明の一実施形態の電動送風機を用いた騒音試験結果の周波数−騒音値線図（最大風量実現状態）。The frequency-noise value diagram of the noise test result using the electric blower of one embodiment of the present invention (maximum air volume realization state). 従来の電動送風機に用いる遠心ファンの縦断面図。The longitudinal cross-sectional view of the centrifugal fan used for the conventional electric blower.

符号の説明Explanation of symbols

１ 電動送風機
２ 遠心ファン
３ 回転軸
４ モータ
５ ケース
６ ファンカバー
６ａ 吸込開口部
７ モータケース
８ フレーム
２１ ディフューザ
２５ 円弧状ブレード
２６ 円弧状ブレード
３１ 空気吸込口
３２ 前側プレート
３２ｂ 外周端
３３ 後側プレート
３３ｂ 外周端
３４ ファンブレード
３４ｂ 先端
３４ｂ１ 一側端
３４ｂ２ 他側端
３５ 吐出口 DESCRIPTION OF SYMBOLS 1 Electric blower 2 Centrifugal fan 3 Rotating shaft 4 Motor 5 Case 6 Fan cover 6a Suction opening 7 Motor case 8 Frame 21 Diffuser 25 Arc-shaped blade 26 Arc-shaped blade 31 Air inlet 32 Front plate 32b Outer end 33 Rear plate 33b Outer peripheral end 34 Fan blade 34b Front end 34b 1 One end 34b 2 Other end 35 Discharge port

Claims (3)

電動機の回転軸に取付けられ、複数枚のファンブレードを有する遠心ファンと、
この遠心ファンの周面に形成された吐出口に対向して前記遠心ファンの外周に位置する複数枚のディフューザブレードを有するディフューザを備えた電動送風機において、前記ファンブレードの先端は一側端から他側端に向かってほぼ直線状に傾斜することを特徴とする電動送風機。 A centrifugal fan attached to a rotating shaft of an electric motor and having a plurality of fan blades;
In the electric blower provided with a diffuser having a plurality of diffuser blades positioned on the outer periphery of the centrifugal fan so as to face the discharge port formed on the peripheral surface of the centrifugal fan, the tip of the fan blade extends from one end to the other. An electric blower that is inclined substantially linearly toward a side end. 前記ファンブレードは空気吸込口側の前側プレートと、この前側プレートと同一直径を有しこの前側プレートに対向する後側プレート間に設けられ、前記ファンブレードの先端の一側端は前記前側プレートの外周端よりファン軸芯側に位置し、他側端は前記前側プレートの一側端よりもファン軸芯側に位置することを特徴とする請求項１に記載の電動送風機。 The fan blade is provided between a front plate on the air suction port side and a rear plate having the same diameter as the front plate and facing the front plate, and one end of the front end of the fan blade is located on the front plate. 2. The electric blower according to claim 1, wherein the electric blower is located closer to the fan shaft core than the outer peripheral end, and the other end is located closer to the fan shaft core than one side end of the front plate. 掃除機本体内に請求項１または２に記載の電動送風機を収容したことを特徴とする電気掃除機。 An electric vacuum cleaner characterized in that the electric blower according to claim 1 or 2 is housed in a vacuum cleaner body.
JP2007151937A 2007-06-07 2007-06-07 Electric air blower and vacuum cleaner using this electric air blower Pending JP2008303793A (en)

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KR1020080052572A KR20080108021A (en) 2007-06-07 2008-06-04 Electric fan and electric cleaner using the same
EP08251979A EP2000070B1 (en) 2007-06-07 2008-06-06 Motor blower and electric vacuum cleaner using same
CNA2008101083063A CN101319682A (en) 2007-06-07 2008-06-06 Motor blower and electric vacuum cleaner using same
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PL442240A1 (en) * 2022-09-09 2024-03-11 Wróblewski Andrzej Przedsiębiorstwo Techniczno-Handlowe Energowent Radial fan

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RU2388400C2 (en) 2010-05-10
EP2000070A3 (en) 2009-10-14
CN101319682A (en) 2008-12-10
EP2000070B1 (en) 2012-02-01
KR20080108021A (en) 2008-12-11
RU2008122877A (en) 2009-12-20

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