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JP3752870B2 - Electric blower - Google Patents
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JP3752870B2 - Electric blower - Google Patents

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Publication number
JP3752870B2
JP3752870B2 JP35751198A JP35751198A JP3752870B2 JP 3752870 B2 JP3752870 B2 JP 3752870B2 JP 35751198 A JP35751198 A JP 35751198A JP 35751198 A JP35751198 A JP 35751198A JP 3752870 B2 JP3752870 B2 JP 3752870B2
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JP
Japan
Prior art keywords
air guide
impeller
stationary blade
blade
electric motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
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JP35751198A
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Japanese (ja)
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JP2000179494A (en
Inventor
博之 香山
徹 広瀬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Corp
Panasonic Holdings Corp
Original Assignee
Panasonic Corp
Matsushita Electric Industrial Co Ltd
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Priority to JP35751198A priority Critical patent/JP3752870B2/en
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Description

【0001】
【発明の属する技術分野】
本発明は、塵埃を吸引する電気掃除機等に使用される電動送風機に関する。
【0002】
【従来の技術】
近年、電気掃除機は、じゅうたん掃除などを効果的に行うため、電動送風機を高出力化する傾向にある。また高出力化に伴う騒音の増大を低減する傾向にある。
【0003】
以下に従来の電動送風機について、図7及び図8に基づいて説明する。
【0004】
図7はインペラ、ファンケース及びモータからなる電動送風機の一部欠載側面図で、図8(a)はインペラの一部欠載及びエアガイドの平面図で、同図(b)は静翼部J−J箇所の略断面である。
【0005】
図7及び図8において、1はインペラ本体で、1aはその吸気口である。2はは板金製前面シュラウドで、3はこれに対向する同じく板金製後面シュラウドである。4はこの1対のシュラウド内に設けた複数枚の板金製ブレードで、各板金製ブレード4と対向するシュラウド2・3はかしめ加工により結合されている。
【0006】
5はインペラ本体1を回転駆動するモータで、6はエアガイド本体で、エアガイド基板7上に静翼8を垂直に配置している。9はインペラ本体1及びエアガイド本体6を内包しモータ5の外周に気密に取り付けたファンケースで、その中央部に吸気口を有する。10はエアガイド基板7表面、静翼8、ファンケース9内壁で囲まれるディフューザ通路である。
【0007】
以上の構成における動作について説明すると、インペラ本体1が高速回転して、この吸気口1aから空気流を吸い込み、前面及び後面シュラウド2・3とブレード4とで囲まれる内部通路を通過し、インペラ本体1外周端から排出する。さらにインペラ本体1から排出された空気流は、エアガイド基板7表面、静翼8、ファンケース9内壁で囲まれるディフューザ通路10を通過し圧力回復が行われ、エアガイド基板7裏面を経てモータ5内部へと排出される。
【0008】
【発明が解決しようとする課題】
上記電動送風機では、空気流の高い圧力のためエアガイド基板7表面、静翼8、ファンケース9内壁で囲まれるディフューザ通路10において、静翼8とファンケース9内壁の接触部で気流が漏れてしまい圧力回復量の低減、内部流れが乱れ損失が発生する。またインペラ本体1のブレード4の翼高さ方向でほぼ均一に排出される空気流が、静翼8の翼高さ方向で同時に衝突するため衝突音などの騒音・振動を発生させるという課題を有していた。
【0009】
本発明は、空気流の漏れを防ぎ、さらに衝突音などの騒音を低減した電動送風機を提供することを目的とする。
【0010】
【課題を解決するための手段】
上記目的を達成するために本発明は、静翼がエアガイド基板表面に対して根本から上端に向けて傾斜を有したので、空気流がエアガイド基板表面、静翼、ファンケース内壁で囲まれるディフューザ通路を通過する際、エアガイド基板表面側に押し付けられ、静翼−ファンケース内壁間での漏れによる圧力回復の低減及び流れの乱れによる損失を抑えることができる。
【0011】
【発明の実施の形態】
本発明の請求項1記載の発明は、電動機と、この電動機による回転する遠心型インペラと、前記インペラ外周に配置されたエアガイドと、前記インペラ及びエアガイドを覆うファンケースを備え、前記エアガイド上に配置された複数枚の静翼が、エアガイド基板表面に対して根本から上端に向けて片面のみ傾斜を有し、対となる面はエアガイド基板表面に対して垂直、もしくは微少の傾斜角を有したもので、空気流がエアガイド基板表面、静翼、ファンケース内壁で囲まれるディフューザ通路を通過する際、エアガイド基板表面側に押し付けられ、静翼−ファンケース内壁間での漏れによる圧力回復の低減及び流れの乱れによる損失を抑えることができる。さらにインペラ本体のブレードの翼高さ方向でほぼ均一に排出される空気流が、静翼の翼高さ方向で同時に衝突するために生ずる衝突音などの騒音・振動を低減することができる。また、成型加工により簡易に形状を製作することができ、さらに静翼が厚肉となるため熱による変形を抑えることができる。
【0012】
本発明の請求項2記載の発明は、電動機と、この電動機による回転する遠心型インペラと、前記インペラ外周に配置されたエアガイドと、前記インペラ及びエアガイドを覆うファンケースを備え、前記エアガイド上に配置された複数枚の静翼が、エアガイド基板表面に対して根本から上端に向けて傾斜を有し、前記静翼はエアガイド基板表面と一体となった片面のみ傾斜した基板部静翼と、前記基板部静翼の非傾斜側である垂直部と結合しかつ基板部静翼傾斜面と略平行となる傾斜面を有する付加静翼部を設けたもので、静翼を2部品から構成することにより、それぞれの形状を簡易に、かつ精細に製作することができる。さらに付加静翼部とファンケースの接触面積を増大することが可能で、この箇所での漏れを防ぐことができる。
【0013】
本発明の請求項3記載の発明は、特に第2の発明において複数枚の付加静翼部を均等に列した円環状の天板を設けたもので、静翼と天板が一体となっており、隣り合ったデュフューザ通路同士で空気流の漏れが生じないため圧力回復がスムーズに行われる。さらに複数の付加静翼部が天板と一部品となっているため、組立を容易に行うことができる。
【0014】
本発明の請求項4記載の発明は、電動機と、この電動機による回転する遠心型インペラと、前記インペラ外周に配置されたエアガイドと、前記インペラ及びエアガイドを覆うファンケースを備え、前記エアガイド上に配置された複数枚の静翼が、エアガイド基板表面に対して根本から上端に向けて傾斜を有し、前記静翼の傾斜角を、エアガイドの内周側から外周側へと徐々に変化させたもので、ディフューザ通路断面形状を、静翼の曲率や翼長を変更せずに調整することが可能となりスムーズに圧力回復を行うことができる。
【0015】
本発明の請求項5記載の発明は、電動機と、この電動機による回転する複数枚のブレードを有した遠心型インペラと、前記インペラ外周に配置されたエアガイドと、前記インペラ及びエアガイドを覆うファンケースを備え、前記ブレードのインペラ外周端は回転方向に倒れ込む形状とし、前記エアガイド上に配置された複数枚の静翼が、エアガイド基板表面に対して根本から上端に向けて前記ブレードの傾斜方向とは逆方向に傾斜を有したもので、インペラ本体外周端の後面シュラウド側で高められた空気流の圧力が、スムーズにエアガイド基板側に送り込まれ、さらにブレードと静翼の交差する時間が長くなるため、衝突音などの騒音・振動がより低減することができる。
【0016】
【実施例】
以下、本発明の実施例について、図1から図6を用いて説明する。
【0017】
(実施例1)
本発明の第1の実施例を図1により説明する。なお、インペラとモータとの取付構成及びエアガイドとの配置関係は従来の構成と同等なので、その詳細な説明を省略する。本実施例の特徴はエアガイド本体にあるので、以下それを詳細に説明する。
【0018】
図1(a)はインペラ本体21の一部欠載図及びエアガイド本体25の平面図で、同図(b)は同図(a)のA−A箇所の略断面図である。
【0019】
図1において、21はインペラ本体で、22及び23は板金製の対向する前面及び後面シュラウドであり、24はその内部にかしめ加工された複数枚の板金製ブレードである。25はエアガイド本体で、26はエアガイド基板であり、この表面には静翼27がインペラ本体21の回転方向とは逆方向に倒れ込むように傾斜して設けられている。
【0020】
28はファンケースの一部略断面であり、静翼27の一端と接触している。29はエアガイド基板26表面、静翼27、ファンケース28内壁で囲まれるディフューザ通路である。
【0021】
以上の構成における動作について説明すると、インペラ本体21が高速回転して外周端より空気流が排出される。この空気流はエアガイド基板26表面、静翼27、ファンケース28内壁で囲まれるディフューザ通路29に突入するが、このとき空気流は傾斜した静翼27に沿って下方のエアガイド基板26側に押し当てられる。そのため静翼27とファンケース28との接触部での漏れによる圧力回復の低減が抑えられ、また漏れた空気流が隣接するディフューザ通路29と混合するために生じる乱れによる損失も低減することができる。
【0022】
さらにインペラ本体21のブレード24の翼高さ方向でほぼ均一に排出される空気流が、静翼27の翼高さ方向で時間差をおいて衝突し、衝突音などの騒音振動を低減する。
【0023】
以上のように本実施例の電動送風機によれば、静翼27がエアガイド基板26表面に対して根本から上端に向けて傾斜を有したので、空気流がエアガイド基板26表面、静翼27、ファンケース28内壁で囲まれるディフューザ通路29を通過する際、エアガイド基板26表面側に押し付けられ、静翼27−ファンケース28内壁間での漏れによる圧力回復の低減及び流れの乱れによる損失を抑えて高い吸い込み性能を得ることができる。
【0024】
さらにインペラ本体21から排出された空気流が時間差をおいて静翼27内周先端部に衝突するため、衝突音などの騒音や衝撃による振動の発生を抑えることができる。
【0025】
(実施例2)
本発明の第2の実施例を図2により説明する。なお、インペラ本体21及びエアガイド本体25の基本構成は上記第1の実施例と同等であるので、同一構成部品には同一符号を付しその詳細な説明を省略するとともに、本実施例の特徴部分であるエアガイド静翼近傍につき、以下それを詳細に説明する。
【0026】
図2(a)はインペラ本体21の一部欠載図及びエアガイド本体25の平面図で、同図(b)は同図(a)のB−B箇所の略断面図である。
【0027】
図2において、静翼37はインペラ本体21の回転方向に対して前方に直立面37a、後方に傾斜面37bを有しており、ファンケース28側が先細っている。なお直立面37aは成型加工で必要とされる抜きテーパ用に微少な傾斜となっていても構わない。
【0028】
このことから空気流が傾斜面37bに沿ってエアガイド基板26側に押し当てられ漏れによる損失を低減できる上に、本形状を成型加工により簡易に実現することができる。また静翼27根本付近の板厚が増すため、モータからの熱伝導に温度が上昇しても静翼27自身及びエアガイド本体21の変形を抑えることができる。
【0029】
(実施例3)
本発明の第3の実施例を図3により説明する。なお、インペラ本体21及びエアガイド本体25の基本構成は上記第1の実施例と同等であるので、同一構成部品には同一符号を付しその詳細な説明を省略するとともに、本実施例の特徴部分であるエアガイド静翼近傍につき、以下それを詳細に説明する。
【0030】
図3(a)はインペラ本体21の一部欠載図及びエアガイド本体25の平面図で、同図(b)は同図(a)のC−C箇所の略断面図である。
【0031】
図3において、静翼47はインペラ本体21の回転方向に対して前方に直立面47a、後方に傾斜面47bを有しており、ファンケース28側が先細っている。48は複数部品の付加静翼部であり、エアガイド本体25に流入する空気流がこの付加静翼部48の傾斜に沿ってエアガイド基板26へと押し当てられ、ファンケース28側への流れが減少する。また付加静翼部48は、傾斜面47bと略平行となる付加静翼部傾斜面48aを有し、裏面である付加静翼部直立面48bで直立面47aと接合している。
【0032】
このことから空気流が付加静翼部傾斜面48a及び傾斜面47bに沿ってエアガイド基板26側に押し当てられ漏れによる損失を低減できて高い吸い込み性能を実現できる上に、本形状を成型加工をして接合するだけの単純な工法で簡易に実現することができる。
【0033】
(実施例4)
本発明の第4の実施例を図4により説明する。なお、インペラ本体21及びエアガイド本体25の基本構成は上記第3の実施例と同等であるので、同一構成部品には同一符号を付しその詳細な説明を省略するとともに、本実施例の特徴部分であるエアガイド本体25の静翼近傍につき、以下それを詳細に説明する。
【0034】
図4(a)はインペラ本体21の一部欠載図及びエアガイド本体25の平面図で、同図(b)は同図(a)のD−D箇所の略断面図である。
【0035】
図4において、49は複数部品である付加静翼部47と一体となった円環状の天板であり、天板下面49aがファンケース28内壁に代わりディフューザ通路29を形成し、天板上面49bがファンケース28内壁と接合している。
【0036】
このことから空気流が付加静翼部傾斜面48a及び傾斜面47bに沿ってエアガイド基板26側に押し当てられ漏れによる損失を低減でき、さらに天板49を有する箇所では漏れそのものが発生しないため高い吸い込み性能を実現できる。加えて本形状を2部品のみの成型加工をして接合するだけの単純な工法で簡易に実現することができる
(実施例5)
本発明の第5の実施例を図5により説明する。なお、インペラ本体21及びエアガイド本体25の基本構成は上記第1の実施例と同等であるので、同一構成部品には同一符号を付しその詳細な説明を省略するとともに、本実施例の特徴部分であるエアガイド本体25の静翼近傍につき、以下それを詳細に説明する。
【0037】
図5(a)はインペラ本体21の一部欠載図及びエアガイド本体25の平面図で、同図(b)、(c)、(d)はそれぞれ同図(a)のE−E、F−F、G−G箇所の略断面図である。
【0038】
図5において、静翼27の傾斜角度がE−E箇所からF−F箇所を経てG−G箇所へと徐々に少量となっている。
【0039】
このことから圧力の高い静翼内周側E−E箇所付近では漏れによる損失を低減するために静翼27の傾斜角度を大きくして、逆に圧力が低い静翼外周側G−G箇所付近では損失の少ない正方形に近づけるため傾斜角度を小さくしてスムーズに圧力回復が行われ高い吸い込み性能を得ることができる。
【0040】
(実施例6)
本発明の第6の実施例を図6により説明する。なお、インペラ本体21及びエアガイド本体25の基本構成は上記第1の実施例と同等であるので、同一構成部品には同一符号を付しその詳細な説明を省略するとともに、本実施例の特徴部分であるエアガイド本体25の静翼近傍につき、以下それを詳細に説明する。
【0041】
図6(a)はインペラ本体21の一部欠載図及びエアガイド本体25の平面図で、同図(b)、(c)はそれぞれ同図(a)のH−H箇所及びI−I箇所の略断面図である。
【0042】
図6において、板金製ブレード24のインペラ本体21外周端は回転方向に対して板金製前方シュラウド22側が前方に傾斜しており、逆に静翼27は後方に傾斜している。
【0043】
このことからインペラ本体21外周端の板金製後面シュラウド23側で高められた空気流の圧力が、スムーズにエアガイド基板26側に送り込まれるため高い吸い込み性能を実現することができる。さらに板金製ブレード24と静翼27の交差する時間が長くなるため、衝突音などの騒音・振動がより低減することができる。
【0044】
【発明の効果】
本発明の請求項1記載の発明は、静翼が、エアガイド基板表面に対して根本から上端に向けて片面のみ傾斜を有し、対となる面はエアガイド基板表面に対して垂直、もしくは微少の傾斜角を有したので、空気流がエアガイド基板表面、静翼、ファンケース内壁で囲まれるディフューザ通路を通過する際、エアガイド基板表面側に押し付けられ、静翼−ファンケース内壁間での漏れによる圧力回復の低減及び流れの乱れによる損失を抑えて高い吸い込み性能を得ることができる。さらにインペラ本体から排出された空気流が時間差をおいて静翼内周先端部に衝突するため、衝突音などの騒音や衝撃による振動の発生を抑えることができる。また、静翼はインペラ本体の回転方向に対して前方に直立面、後方に傾斜面を有しており、ファンケース側が先細っているので、傾斜面に沿ってエアガイド基板側に押し当てられ漏れによる損失を低減できる上に、本形状を成型加工により簡易に実現することができる。また静翼根本付近の板厚が増すため、モータからの熱伝導に温度が上昇しても静翼自身及びエアガイド本体の変形を抑えることができる。
【0045】
本発明の請求項2記載の発明は、静翼はインペラ本体の回転方向に対して前方に直立面、後方に傾斜面を有しており、ファンケース側が先細っている。さらに複数部品である付加静翼部は、傾斜面と略平行となる付加静翼部傾斜面を有し、裏面である付加静翼部直立面で直立面と接合しているので、空気流が付加静翼部傾斜面及び傾斜面に沿ってエアガイド基板側に押し当てられ漏れによる損失を低減できて高い吸い込み性能を実現できる上に、本形状を成型加工をして接合するだけの単純な工法で簡易に実現することができる。
【0046】
本発明の請求項3記載の発明は、複数部品である付加静翼部と一体となった円環状の天板と、天板下面がファンケース内壁に代わりディフューザ通路を形成し、天板上面がファンケース内壁と接合しているので、空気流が付加静翼部傾斜面及び傾斜面に沿ってエアガイド基板側に押し当てられ漏れによる損失を低減でき、さらに天板を有する箇所では漏れそのものが発生しないため高い吸い込み性能を実現できる。加えて本形状を2部品のみの成型加工をして接合するだけの単純な工法で簡易に実現することができる。
【0047】
本発明の請求項4記載の発明は、圧力の高い静翼内周側付近では漏れによる損失を低減するために静翼の傾斜角度を大きくし、逆に圧力が低い静翼外周側付近では流れの損失の少ない正方形に近づけるため傾斜角度を小さくしてスムーズに圧力回復が行われ高い吸い込み性能を得ることができる。
【0048】
本発明の請求項5記載の発明は、板金製ブレードのインペラ本体外周端は回転方向に対して板金製前方シュラウド側が前方に傾斜しており、逆に静翼は後方に傾斜しているので、インペラ本体外周端の板金製後面シュラウド側で高められた空気流の圧力が、スムーズにエアガイド基板側に送り込まれるため高い吸い込み性能を実現することができる。さらに板金製ブレードと静翼の交差する時間が長くなるため、衝突音などの騒音・振動がより低減することができる。
【図面の簡単な説明】
【図1】 (a)本発明の第1の実施の形態による電動送風機のインペラ本体及びエアガイド本体の平面図
(b)図1(a)のA−A略断面図
【図2】 (a)本発明の第2の実施の形態による電動送風機のインペラ本体及びエアガイド本体の平面図
(b)図2(a)のB−B略断面図
【図3】 (a)本発明の第3の実施の形態による電動送風機のインペラ本体及びエアガイド本体の平面図
(b)図3(a)のC−C略断面図
【図4】 (a)本発明の第4の実施の形態による電動送風機のインペラ及びエアガイドの平面図
(b)図4(a)のD−D略断面図
【図5】 (a)本発明の第5の実施の形態による電動送風機のインペラ本体及びエアガイド本体の平面図
(b)図5(a)のE−E略断面図
(c)図5(a)のF−F略断面図
(d)図5(a)のG−G略断面図
【図6】 (a)本発明の第6の実施の形態による電動送風機のインペラ本体及びエアガイド本体の平面図
(b)図6(a)のH−H略断面図
(c)図6(a)のI−I略断面図
【図7】 従来の電動送風機の一部欠載側面図
【図8】 (a)従来の電動送風機のインペラ及びエアガイドの平面図
(b)図8(a)のJ−J略断面図
【符号の説明】
21 インペラ本体
22 板金製前面シュラウド
23 板金製後面シュラウド
24 板金製ブレード
25 エアガイド本体
26 エアガイド基板
27・37・47 静翼
28 ファンケース
29 ディフューザ通路
37a・47a 直立面
37b・47b 傾斜面
48 付加静翼部
48a 付加静翼部傾斜面
48b 付加静翼部直立面
49 天板
49a 天板下面
49b 天板上面
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electric blower used for a vacuum cleaner or the like that sucks dust.
[0002]
[Prior art]
In recent years, electric vacuum cleaners tend to increase the output of electric blowers in order to perform carpet cleaning and the like effectively. In addition, there is a tendency to reduce the increase in noise associated with higher output.
[0003]
Hereinafter, a conventional electric blower will be described with reference to FIGS.
[0004]
FIG. 7 is a partially cutaway side view of an electric blower comprising an impeller, a fan case, and a motor, FIG. 8A is a partially cutaway view of an impeller and a plan view of an air guide, and FIG. It is a general | schematic cross section of a part JJ place.
[0005]
7 and 8, reference numeral 1 denotes an impeller body, and 1a denotes an intake port thereof. 2 is a sheet metal front shroud, and 3 is a sheet metal rear shroud facing the same. Reference numeral 4 denotes a plurality of sheet metal blades provided in the pair of shrouds, and the shrouds 2 and 3 facing each of the sheet metal blades 4 are joined by caulking.
[0006]
Reference numeral 5 denotes a motor that rotationally drives the impeller body 1, and reference numeral 6 denotes an air guide body. A stationary blade 8 is vertically arranged on the air guide substrate 7. A fan case 9 includes the impeller body 1 and the air guide body 6 and is airtightly attached to the outer periphery of the motor 5. The fan case 9 has an air inlet at the center thereof. Reference numeral 10 denotes a diffuser passage surrounded by the surface of the air guide substrate 7, the stationary blade 8 and the inner wall of the fan case 9.
[0007]
The operation in the above configuration will be described. The impeller body 1 rotates at high speed, sucks an air flow from the intake port 1a, passes through an internal passage surrounded by the front and rear shrouds 2 and 3 and the blade 4, and the impeller body 1 Discharge from the outer edge. Further, the air flow discharged from the impeller body 1 passes through a diffuser passage 10 surrounded by the surface of the air guide substrate 7, the stationary blade 8, and the inner wall of the fan case 9, pressure recovery is performed, and the motor 5 passes through the back surface of the air guide substrate 7. It is discharged inside.
[0008]
[Problems to be solved by the invention]
In the electric blower, airflow leaks at the contact portion between the stationary blade 8 and the inner wall of the fan case 9 in the diffuser passage 10 surrounded by the surface of the air guide substrate 7, the stationary blade 8, and the inner wall of the fan case 9 due to the high pressure of the airflow. As a result, the pressure recovery amount is reduced, the internal flow is disturbed, and loss occurs. Further, since the air flow discharged almost uniformly in the blade height direction of the blade 4 of the impeller body 1 collides simultaneously in the blade height direction of the stationary blade 8, there is a problem that noise and vibration such as a collision sound are generated. Was.
[0009]
An object of the present invention is to provide an electric blower that prevents airflow leakage and further reduces noise such as collision noise.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, since the stationary blade has an inclination from the root to the upper end with respect to the air guide substrate surface, the air flow is surrounded by the air guide substrate surface, the stationary blade, and the fan case inner wall. When passing through the diffuser passage, it is pressed against the surface side of the air guide substrate, reducing pressure recovery due to leakage between the stationary blade and the inner wall of the fan case, and suppressing loss due to flow disturbance.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 of the present invention includes an electric motor, a centrifugal impeller rotated by the electric motor, an air guide disposed on the outer periphery of the impeller, and a fan case that covers the impeller and the air guide. The plurality of stationary blades arranged on the upper surface of the air guide substrate has an inclination from one side to the upper end with respect to the air guide substrate surface, and the paired surfaces are perpendicular to the air guide substrate surface or slightly inclined. When the air flow passes through the diffuser passage surrounded by the air guide board surface, the stationary blade, and the fan case inner wall, the air flow is pressed against the air guide board surface side, and leakage between the stationary blade and the fan case inner wall occurs. It is possible to reduce the pressure recovery due to the pressure and the loss due to the flow disturbance. Furthermore, it is possible to reduce noises and vibrations such as a collision sound generated when the air flow substantially uniformly discharged in the blade height direction of the blade of the impeller body collides simultaneously in the blade height direction of the stationary blade. In addition, the shape can be easily manufactured by molding, and the stator blade is thick, so that deformation due to heat can be suppressed.
[0012]
The invention according to claim 2 of the present invention includes an electric motor, a centrifugal impeller rotated by the electric motor, an air guide disposed on the outer periphery of the impeller, and a fan case that covers the impeller and the air guide. The plurality of stationary blades arranged on the top have an inclination from the root to the upper end with respect to the air guide substrate surface, and the stationary blade is inclined only on one side integrated with the air guide substrate surface. and wings, which was provided with a non-inclined side is combined with the vertical portion and the additional stationary blade portions having an inclined surface which is substantially parallel to the substrate portion vane inclined surface of the substrate section vane, 2 parts of stator blades Each configuration can be easily and finely manufactured. Further, the contact area between the additional stationary blade portion and the fan case can be increased, and leakage at this location can be prevented.
[0013]
The invention according to claim 3 of the present invention is an annular top plate in which a plurality of additional stationary blade portions are evenly arranged in the second invention, and the stationary blade and the top plate are integrated. In addition, since the air flow does not leak between adjacent diffuser passages, pressure recovery is performed smoothly. Further, since the plurality of additional stationary blade portions are formed as one part with the top plate, the assembly can be easily performed.
[0014]
The invention according to claim 4 of the present invention includes an electric motor, a centrifugal impeller rotated by the electric motor, an air guide disposed on the outer periphery of the impeller, and a fan case covering the impeller and the air guide. The plurality of stationary blades arranged on the top has an inclination from the root to the upper end with respect to the air guide substrate surface, and the inclination angle of the stationary blade is gradually increased from the inner peripheral side to the outer peripheral side of the air guide. which was varied in the diffuser passage cross section, it is possible to perform the pressure recovery smoothly it is possible to adjust without changing the curvature or the blade length of the vane.
[0015]
According to a fifth aspect of the present invention, an electric motor, a centrifugal impeller having a plurality of blades rotated by the electric motor, an air guide disposed on the outer periphery of the impeller, and a fan covering the impeller and the air guide A blade having an impeller outer peripheral end falling in a rotational direction, and a plurality of stationary blades disposed on the air guide are inclined from the root toward the upper end with respect to the air guide substrate surface. The airflow pressure increased on the rear shroud side of the outer periphery of the impeller body is smoothly sent to the air guide board side, and the time when the blade and the stationary blade cross each other Therefore, noise and vibration such as collision noise can be further reduced.
[0016]
【Example】
Embodiments of the present invention will be described below with reference to FIGS.
[0017]
Example 1
A first embodiment of the present invention will be described with reference to FIG. Note that the mounting configuration of the impeller and the motor and the positional relationship between the air guide and the conventional configuration are the same as those of the conventional configuration, and thus detailed description thereof is omitted. Since the feature of this embodiment resides in the air guide body, it will be described in detail below.
[0018]
1A is a partially omitted view of the impeller body 21 and a plan view of the air guide body 25, and FIG. 1B is a schematic cross-sectional view taken along the line AA in FIG.
[0019]
In FIG. 1, 21 is an impeller body, 22 and 23 are opposed front and rear shrouds made of sheet metal, and 24 is a plurality of sheet metal blades caulked inside. Reference numeral 25 denotes an air guide body, and 26 denotes an air guide substrate, and a stationary blade 27 is inclined on the surface so as to fall in a direction opposite to the rotation direction of the impeller body 21.
[0020]
Reference numeral 28 denotes a partial cross section of the fan case, which is in contact with one end of the stationary blade 27. A diffuser passage 29 is surrounded by the surface of the air guide substrate 26, the stationary blade 27, and the inner wall of the fan case 28.
[0021]
The operation in the above configuration will be described. The impeller body 21 rotates at a high speed and the air flow is discharged from the outer peripheral end. This air flow enters the diffuser passage 29 surrounded by the surface of the air guide substrate 26, the stationary blade 27, and the inner wall of the fan case 28. At this time, the air flow is directed toward the lower air guide substrate 26 along the inclined stationary blade 27. Pressed. Therefore, reduction in pressure recovery due to leakage at the contact portion between the stationary blade 27 and the fan case 28 can be suppressed, and loss due to turbulence caused by mixing the leaked air flow with the adjacent diffuser passage 29 can be reduced. .
[0022]
Further, the air flow discharged substantially uniformly in the blade height direction of the blade 24 of the impeller body 21 collides with a time difference in the blade height direction of the stationary blade 27, and noise vibration such as a collision sound is reduced.
[0023]
As described above, according to the electric blower of the present embodiment, since the stationary blade 27 has an inclination from the root toward the upper end with respect to the surface of the air guide substrate 26, the air flow is on the surface of the air guide substrate 26 and the stationary blade 27. When passing through the diffuser passage 29 surrounded by the inner wall of the fan case 28, it is pressed against the surface of the air guide substrate 26, reducing pressure recovery due to leakage between the stationary blade 27 and the inner wall of the fan case 28, and loss due to flow turbulence. High suction performance can be obtained by suppressing.
[0024]
Furthermore, since the air flow discharged from the impeller body 21 collides with the inner peripheral tip portion of the stationary blade 27 with a time difference, it is possible to suppress the occurrence of noise such as collision noise and vibration due to impact.
[0025]
(Example 2)
A second embodiment of the present invention will be described with reference to FIG. The basic configurations of the impeller body 21 and the air guide body 25 are the same as those of the first embodiment. Therefore, the same components are denoted by the same reference numerals and detailed description thereof is omitted, and the features of the present embodiment are also described. The vicinity of the air guide vane, which is a part, will be described in detail below.
[0026]
2A is a partially omitted view of the impeller body 21 and a plan view of the air guide body 25, and FIG. 2B is a schematic cross-sectional view taken along the line BB in FIG. 2A.
[0027]
In FIG. 2, the stationary blade 37 has an upright surface 37 a on the front side and an inclined surface 37 b on the rear side with respect to the rotation direction of the impeller body 21, and the fan case 28 side is tapered. The upright surface 37a may have a slight inclination for a punch taper required for molding.
[0028]
From this, the air flow is pressed against the air guide substrate 26 along the inclined surface 37b and loss due to leakage can be reduced, and the present shape can be easily realized by molding. Further, since the plate thickness near the root of the stationary blade 27 is increased, the deformation of the stationary blade 27 itself and the air guide body 21 can be suppressed even if the temperature rises due to heat conduction from the motor.
[0029]
Example 3
A third embodiment of the present invention will be described with reference to FIG. The basic configurations of the impeller body 21 and the air guide body 25 are the same as those of the first embodiment. Therefore, the same components are denoted by the same reference numerals and detailed description thereof is omitted, and the features of the present embodiment are also described. The vicinity of the air guide vane, which is a part, will be described in detail below.
[0030]
FIG. 3A is a partially omitted view of the impeller body 21 and a plan view of the air guide body 25, and FIG. 3B is a schematic cross-sectional view taken along the line CC in FIG.
[0031]
In FIG. 3, the stationary blade 47 has an upright surface 47 a on the front side and an inclined surface 47 b on the rear side with respect to the rotation direction of the impeller body 21, and the fan case 28 side is tapered. Reference numeral 48 denotes a plurality of additional vane portions, and an air flow flowing into the air guide main body 25 is pressed against the air guide substrate 26 along the inclination of the additional vane portion 48 to flow toward the fan case 28. Decrease. The additional stationary blade portion 48 has an additional stationary blade portion inclined surface 48a substantially parallel to the inclined surface 47b, and is joined to the upright surface 47a by the additional stationary blade portion upstanding surface 48b which is the back surface.
[0032]
As a result, the air flow is pressed against the air guide substrate 26 side along the inclined surface 48a and the inclined surface 47b of the additional stationary blade portion, so that the loss due to leakage can be reduced and high suction performance can be realized. It can be easily realized by a simple construction method that only involves joining.
[0033]
(Example 4)
A fourth embodiment of the present invention will be described with reference to FIG. The basic configuration of the impeller main body 21 and the air guide main body 25 is the same as that of the third embodiment. Therefore, the same components are denoted by the same reference numerals and detailed description thereof is omitted, and the features of the present embodiment are also described. The portion of the air guide body 25 that is a portion in the vicinity of the stationary blade will be described in detail below.
[0034]
4A is a partially omitted view of the impeller main body 21 and a plan view of the air guide main body 25, and FIG. 4B is a schematic cross-sectional view taken along the line DD in FIG. 4A.
[0035]
In FIG. 4, reference numeral 49 denotes an annular top plate integrated with a plurality of additional stationary blade portions 47. The top plate lower surface 49a forms a diffuser passage 29 in place of the inner wall of the fan case 28, and the top plate upper surface 49b. Is joined to the inner wall of the fan case 28.
[0036]
Therefore, the air flow is pressed against the air guide substrate 26 side along the inclined surface 48a and the inclined surface 47b of the additional stationary blade portion, so that the loss due to the leakage can be reduced, and further, the leakage itself does not occur at the portion having the top plate 49. High suction performance can be realized. In addition, this shape can be easily realized by a simple construction method in which only two parts are molded and joined (Example 5).
A fifth embodiment of the present invention will be described with reference to FIG. The basic configurations of the impeller body 21 and the air guide body 25 are the same as those of the first embodiment. Therefore, the same components are denoted by the same reference numerals and detailed description thereof is omitted, and the features of the present embodiment are also described. The portion of the air guide body 25 that is a portion in the vicinity of the stationary blade will be described in detail below.
[0037]
FIG. 5 (a) is a partially omitted view of the impeller body 21 and a plan view of the air guide body 25. FIGS. 5 (b), (c), and (d) are EE of FIG. It is a schematic sectional drawing of FF and GG location.
[0038]
In FIG. 5, the inclination angle of the stationary blade 27 gradually decreases from the EE point to the GG point through the FF point.
[0039]
For this reason, in order to reduce the loss due to leakage in the vicinity of the high pressure stationary vane inner circumferential side EE, the inclination angle of the stationary blade 27 is increased in order to reduce the loss due to leakage. Then, since it approaches a square with little loss, the inclination angle is reduced, pressure recovery is performed smoothly, and high suction performance can be obtained.
[0040]
(Example 6)
A sixth embodiment of the present invention will be described with reference to FIG. The basic configurations of the impeller body 21 and the air guide body 25 are the same as those of the first embodiment. Therefore, the same components are denoted by the same reference numerals and detailed description thereof is omitted, and the features of the present embodiment are also described. The portion of the air guide body 25 that is a portion in the vicinity of the stationary blade will be described in detail below.
[0041]
6A is a partially omitted view of the impeller main body 21 and a plan view of the air guide main body 25. FIGS. 6B and 6C are respectively the HH position and II of FIG. It is a schematic sectional drawing of a location.
[0042]
In FIG. 6, the outer peripheral end of the impeller body 21 of the sheet metal blade 24 is inclined forward on the sheet metal front shroud 22 side with respect to the rotation direction, and the stationary blade 27 is inclined backward.
[0043]
From this, since the pressure of the air flow raised on the sheet metal rear surface shroud 23 side at the outer peripheral end of the impeller body 21 is smoothly fed to the air guide substrate 26 side, high suction performance can be realized. Furthermore, since the time for the sheet metal blade 24 and the stationary blade 27 to intersect with each other becomes longer, noise and vibration such as collision noise can be further reduced.
[0044]
【The invention's effect】
According to the first aspect of the present invention, the stationary blade has an inclination only on one side from the root to the upper end with respect to the air guide substrate surface, and the paired surfaces are perpendicular to the air guide substrate surface, or Because it has a slight inclination angle , when the air flow passes through the diffuser passage surrounded by the air guide board surface, the stationary blade, and the fan case inner wall, it is pressed against the air guide board surface side and between the stationary blade and the fan case inner wall. It is possible to obtain a high suction performance by reducing pressure recovery due to leakage and suppressing loss due to flow disturbance. Furthermore, since the air flow discharged from the impeller body collides with the inner peripheral tip of the stationary blade with a time difference, it is possible to suppress the occurrence of noise such as collision noise and vibration due to impact. In addition, the stationary blade has an upright front surface and an inclined rear surface with respect to the rotation direction of the impeller body, and the fan case side is tapered, so that it is pressed against the air guide substrate side along the inclined surface. The loss due to leakage can be reduced and the shape can be easily realized by molding. Further, since the plate thickness near the root of the stationary blade is increased, deformation of the stationary blade itself and the air guide body can be suppressed even if the temperature rises due to heat conduction from the motor.
[0045]
According to a second aspect of the present invention, the stationary blade has an upright surface at the front and an inclined surface at the rear with respect to the rotation direction of the impeller body, and the fan case side is tapered. Furthermore, the additional stator blade part which is a plurality of parts has an additional stator blade part inclined surface which is substantially parallel to the inclined surface, and is joined to the upright surface by the additional stator blade part upright surface which is the back surface. The additional vane section is pressed against the air guide board along the inclined surface and the inclined surface, reducing the loss due to leakage and realizing high suction performance. In addition, the shape can be simply molded and joined. It can be easily realized by the construction method.
[0046]
According to a third aspect of the present invention, an annular top plate integrated with a plurality of additional stator blade portions, a top plate lower surface forms a diffuser passage instead of a fan case inner wall, and a top plate upper surface is Since it is joined to the inner wall of the fan case, the air flow is pressed against the air guide board side along the inclined surface and the inclined surface of the additional stator blade, reducing the loss due to leakage. Since it does not occur, high suction performance can be realized. In addition, this shape can be easily realized by a simple construction method in which only two parts are molded and joined.
[0047]
In the invention according to claim 4 of the present invention, the inclination angle of the stationary blade is increased near the inner peripheral side of the high pressure blade to reduce the loss due to leakage, and conversely, the flow is generated near the outer peripheral side of the stationary blade where the pressure is low. Since it is close to a square with little loss, the inclination angle is reduced to smoothly recover the pressure, and high suction performance can be obtained.
[0048]
In the invention according to claim 5 of the present invention, the outer peripheral end of the impeller body of the sheet metal blade is inclined forward on the sheet metal front shroud side with respect to the rotation direction, and the stationary blade is inclined backward, Since the pressure of the air flow increased on the sheet metal rear shroud side at the outer peripheral end of the impeller body is smoothly sent to the air guide substrate side, high suction performance can be realized. Furthermore, since the time for the sheet metal blade and the stationary blade to cross each other becomes longer, noise and vibration such as collision noise can be further reduced.
[Brief description of the drawings]
FIG. 1A is a plan view of an impeller body and an air guide body of an electric blower according to a first embodiment of the present invention. FIG. 1B is a schematic cross-sectional view taken along line AA in FIG. ) Plan view of impeller body and air guide body of electric blower according to second embodiment of the present invention (b) BB schematic cross-sectional view of FIG. 2 (a) [FIG. 3] (a) Third of the present invention FIG. 4B is a schematic cross-sectional view of the impeller body and the air guide body of the electric blower according to the embodiment of FIG. 3B. FIG. 4A is a schematic cross-sectional view of FIG. Plan view of impeller and air guide of blower (b) DD schematic cross-sectional view of Fig. 4 (a) Fig. 5 (a) Impeller body and air guide body of electric blower according to fifth embodiment of the present invention (B) EE schematic cross-sectional view of FIG. 5 (a) (c) FF schematic cross-sectional view of FIG. 5 (a) (d) GG schematic cross-sectional view of FIG. 5A. FIG. 6A is a plan view of an impeller body and an air guide body of an electric blower according to a sixth embodiment of the present invention. FIG. 6B is a plan view of FIG. H-H schematic cross-sectional view (c) II schematic cross-sectional view of FIG. 6 (a) [FIG. 7] Partially cut-away side view of a conventional electric blower [FIG. 8] (a) Impeller of conventional electric blower Plan view of air guide (b) JJ schematic cross-sectional view of FIG. 8 (a) [Explanation of symbols]
DESCRIPTION OF SYMBOLS 21 Impeller main body 22 Sheet metal front surface shroud 23 Sheet metal rear surface shroud 24 Sheet metal blade 25 Air guide main body 26 Air guide board 27/37/47 Stator blade 28 Fan case 29 Diffuser passage 37a / 47a Upright surface 37b / 47b Inclined surface 48 Stator blade portion 48a Additional stator blade portion inclined surface 48b Additional stator blade portion upright surface 49 Top plate 49a Top plate lower surface 49b Top plate upper surface

Claims (5)

電動機と、この電動機による回転する遠心型インペラと、前記インペラ外周に配置されたエアガイドと、前記インペラ及びエアガイドを覆うファンケースを備え、前記エアガイド上に配置された複数枚の静翼が、エアガイド基板表面に対して根本から上端に向けて片面のみ傾斜を有し、対となる面はエアガイド基板表面に対して垂直、もしくは微少の傾斜角を有した電動送風機。An electric motor, a centrifugal impeller rotated by the electric motor, an air guide disposed on the outer periphery of the impeller, and a fan case covering the impeller and the air guide, and a plurality of stationary blades disposed on the air guide include An electric blower having only one side inclined from the root to the upper end with respect to the air guide substrate surface, and the paired surfaces are perpendicular to the air guide substrate surface or have a slight inclination angle . 電動機と、この電動機による回転する遠心型インペラと、前記インペラ外周に配置されたエアガイドと、前記インペラ及びエアガイドを覆うファンケースを備え、前記エアガイド上に配置された複数枚の静翼が、エアガイド基板表面に対して根本から上端に向けて傾斜を有し、前記静翼はエアガイド基板表面と一体となった片面のみ傾斜した基板部静翼と、前記基板部静翼の非傾斜側である垂直部と結合しかつ基板部静翼傾斜面と略平行となる傾斜面を有する付加静翼部を設けた電動送風機。 An electric motor, a centrifugal impeller rotated by the electric motor, an air guide disposed on the outer periphery of the impeller, and a fan case covering the impeller and the air guide, and a plurality of stationary blades disposed on the air guide include The air guide substrate surface has an inclination from the root toward the upper end, and the stationary blade is inclined only on one side integrated with the air guide substrate surface, and the substrate portion stationary blade is not inclined. An electric blower provided with an additional stationary blade portion having an inclined surface that is coupled to a vertical portion that is a side and is substantially parallel to the inclined surface of the stationary blade portion of the substrate portion . 複数枚の付加静翼部を均等に列した円環状の天板を設けた請求項2記載の電動送風機。The electric blower according to claim 2, further comprising an annular top plate in which a plurality of additional stationary blade portions are evenly arranged . 電動機と、この電動機による回転する遠心型インペラと、前記インペラ外周に配置されたエアガイドと、前記インペラ及びエアガイドを覆うファンケースを備え、前記エアガイド上に配置された複数枚の静翼が、エアガイド基板表面に対して根本から上端に向けて傾斜を有し、前記静翼の傾斜角を、エアガイドの内周側から外周側へと徐々に変化させた電動送風機。 An electric motor, a centrifugal impeller rotated by the electric motor, an air guide disposed on the outer periphery of the impeller, and a fan case covering the impeller and the air guide, and a plurality of stationary blades disposed on the air guide include An electric blower having an inclination from the root to the upper end with respect to the air guide substrate surface and gradually changing the inclination angle of the stationary blade from the inner peripheral side to the outer peripheral side of the air guide . 電動機と、この電動機による回転する複数枚のブレードを有した遠心型インペラと、前記インペラ外周に配置されたエアガイドと、前記インペラ及びエアガイドを覆うファンケースを備え、前記ブレードのインペラ外周端は回転方向に倒れ込む形状とし、前記エアガイド上に配置された複数枚の静翼が、エアガイド基板表面に対して根本から上端に向けて前記ブレードの傾斜方向とは逆方向に傾斜を有した電動送風機。 An electric motor, a centrifugal impeller having a plurality of blades rotated by the electric motor, an air guide disposed on the outer periphery of the impeller, and a fan case covering the impeller and the air guide, and an impeller outer peripheral end of the blade is The electric blade has a shape that falls in the rotational direction, and a plurality of stationary blades arranged on the air guide have an inclination in a direction opposite to the inclination direction of the blade from the root to the upper end with respect to the air guide substrate surface. Blower.
JP35751198A 1998-12-16 1998-12-16 Electric blower Expired - Fee Related JP3752870B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP35751198A JP3752870B2 (en) 1998-12-16 1998-12-16 Electric blower

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP35751198A JP3752870B2 (en) 1998-12-16 1998-12-16 Electric blower

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JP2000179494A JP2000179494A (en) 2000-06-27
JP3752870B2 true JP3752870B2 (en) 2006-03-08

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Application Number Title Priority Date Filing Date
JP35751198A Expired - Fee Related JP3752870B2 (en) 1998-12-16 1998-12-16 Electric blower

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JP (1) JP3752870B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7516193B2 (en) * 2020-09-30 2024-07-16 日立グローバルライフソリューションズ株式会社 Blower and washing machine equipped with same
CN112797008B (en) * 2021-01-26 2023-04-18 浙江明新风机有限公司 Explosion-proof fan
CN117146436B (en) * 2023-10-13 2024-04-09 安徽自然使者环保科技有限公司 Pneumatic booster heat-generating air heater

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