JPH0318699A - Electro-motive air blower - Google Patents
Electro-motive air blowerInfo
- Publication number
- JPH0318699A JPH0318699A JP15115889A JP15115889A JPH0318699A JP H0318699 A JPH0318699 A JP H0318699A JP 15115889 A JP15115889 A JP 15115889A JP 15115889 A JP15115889 A JP 15115889A JP H0318699 A JPH0318699 A JP H0318699A
- Authority
- JP
- Japan
- Prior art keywords
- air
- inclination
- motor
- diffuser
- fan
- 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.)
- Granted
Links
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 230000003068 static effect Effects 0.000 abstract description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 240000003473 Grevillea banksii Species 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【発明の詳細な説明】
(イ)産業−ヒの利用分野
+q明は水分を含んだ空気を吸引することのできる、所
謂ウエット型の電動送風機に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Industry - Field of Application +q The present invention relates to a so-called wet type electric blower capable of sucking air containing moisture.
(ロ)従来の技術
此種ウエット型の電動送風機は、例えば実開昭5 +i
− 6 ;{ 5 2号公報に示されるようにファン
力バーの側面から水分を含んだ空気を排気するように[
されている。そのため、例えば第4図に示すように従来
の電動送風機(60)は、ファン力バー(50}の側面
に排気口(51)・・・を設け、遠心ファン(52)か
ら排出された空気流がディフューザー(53〉の外周部
を通過して排気口(51)・・・から排出されるように
なっており、ディフューザー(53)は外周部から中心
部へと向う整流翼がなく、枚射状の平板となって、遠心
ファン(52)から排出された空気流は、ディフューザ
ー(53)で殆んど動圧から静圧に変換されないままフ
ァン力バー(50)外部に排出され、従って水分を含ま
ない空気を吸引する所謂ドライ型の電動送風機に比較し
て大幅に吸込効率が悪化する欠点があった。(b) Conventional technology This kind of wet type electric blower is, for example,
- 6 ;{ 5 As shown in Publication No. 2, air containing moisture is exhausted from the side of the fan power bar [
has been done. Therefore, for example, as shown in Fig. 4, the conventional electric blower (60) is provided with an exhaust port (51) on the side of the fan power bar (50), and the air flow discharged from the centrifugal fan (52) is The diffuser (53) passes through the outer periphery of the diffuser (53) and is discharged from the exhaust port (51). The air flow discharged from the centrifugal fan (52) is discharged to the outside of the fan power bar (50) with almost no conversion from dynamic pressure to static pressure in the diffuser (53), and therefore moisture is removed. Compared to so-called dry-type electric blowers that suck in air that does not contain air, they have the disadvantage of significantly lower suction efficiency.
(ハ)発明が解決しようとする課題
本発明は、水分を含んだ空気を吸引することのできるウ
ェ7ト型の電動送風機において、簡単な構代で空気流を
v1圧から静圧に変換して大幅な吸込効率の改善を実現
することを目的としている。(c) Problems to be Solved by the Invention The present invention is a wet type electric blower that can suck air containing moisture, and converts air flow from v1 pressure to static pressure with a simple structure. The aim is to achieve a significant improvement in suction efficiency.
(二)課題を解決するための手段
本発明の電動送風機はモーターと、該モーターの回転軸
に固着された遠心ファンと、該遠心ファンと前記モータ
ーとの間に配設されたディフューザーと,中央に吸気口
を、側面に複数の排気口を夫々有し、前記遠心ファン及
び前記ディフューザーを覆って前記モーターのモーター
フレームに取り付けられるファン力バーとを備え、前記
モーターフレームは前記ディ7ユーザーの当り面と前記
ファンカバーの側面を圧入する外周面との間に、前記当
り面と前記外周面とを鈍角状に連続する傾斜面を周設し
たことを特徴としている。(2) Means for Solving the Problems The electric blower of the present invention includes a motor, a centrifugal fan fixed to the rotating shaft of the motor, a diffuser disposed between the centrifugal fan and the motor, and a central a fan power bar that covers the centrifugal fan and the diffuser and is attached to the motor frame of the motor; The fan cover is characterized in that an inclined surface that continues the contact surface and the outer peripheral surface at an obtuse angle is provided between the surface and the outer peripheral surface into which the side surface of the fan cover is press-fitted.
さらに、前記電動送風機において、前記ディフューザー
は外周部分に一側面側からfa側面側に向かって傾斜し
た複数の傾斜翼部を所定間隔をおいて形成すると共に隣
りbう傾斜翼部の間に前記排六口に連らなる傾斜遍路を
形或し、前記傾斜翼部は,前記モーターフレームの傾斜
面に沿う形状のフレーム対向端を有したことを特徴とす
るIII或を有している。Furthermore, in the electric blower, the diffuser has a plurality of inclined blade parts inclined from one side toward the fa side at a predetermined interval on the outer circumferential portion, and the exhaust gas is formed between adjacent inclined blade parts. The motor frame has a shape of an inclined path connected to six ends, and the inclined wing portion has a frame-opposed end having a shape along the inclined surface of the motor frame.
(ホ)作 用
上記の横戊により、モータの駆動により遠心ファンが高
遠回転し、ファン力バーの吸気口から空気を吸い込み、
遠心ファンの外周部から放射方向に排出された空気流は
、モーターフレームとディフューザーとファン力バーで
溝戒される通路を介して排気口から排気される。(E) Effect Due to the above horizontal operation, the motor drives the centrifugal fan to rotate at a high distance, sucking air from the intake port of the fan power bar,
The airflow radially discharged from the outer circumference of the centrifugal fan is exhausted from the exhaust port through a passage defined by the motor frame, diffuser, and fan power bar.
このとき,前記モーターフレームにはディフューザーの
当り面の外周部分に傾斜面を周設しているので、空気は
抵抗を受けることなくスムーズに排気口から排出される
と共に、傾斜面のために前記通路が長くなるので、空気
は動圧から静圧への変換が行なわれた後に排気口から排
気される。At this time, since the motor frame is provided with an inclined surface around the outer periphery of the diffuser contact surface, the air is smoothly discharged from the exhaust port without receiving resistance, and the inclined surface allows the air to flow through the air passage. , the air is exhausted from the exhaust port after the dynamic pressure is converted to static pressure.
さらに前記通路となる傾斜通路は、傾斜翼部の7レ・−
ム吋向端が、前記傾斜面まで延長しているので、その分
だけ通路長さが長くなり、従って排出される空気の動圧
から静圧への変換がよりよく行なわtt.a.+込効率
が向上する。Further, the inclined passage serving as the passage is formed by the 7th ray of the inclined wing portion.
Since the inward end of the tt. a. + Including efficiency is improved.
(へ)実施例
以ド、本発明電動送風機の構戊を第1図〜13図に示す
実施例に従って説明する。(f) Embodiments The structure of the electric blower of the present invention will now be explained according to embodiments shown in FIGS. 1 to 13.
(1)は水分を含む空気を吸引することのできるウエッ
ト型の電動送風機で、後部にモーター(2)を備えてい
る。前記モーター(2)は後ケース(3)と該後ケース
(3)の前方開口を閉塞するモーターフレーム(4)か
ら購戒されたモーターケース(5)内に、ロータやステ
ータを内装し、後ケース(3)から後方に突出した後方
回転帖(6)に冷却用ファン(7)を軸着してある。前
記後ケース(3)の底面には前記冷却用ファン(7)に
対向して冷却空気入口(8)が、側面には冷却空気出口
(9)が形成され、前記冷却用ファン(7)の回転によ
り冷却用空気がモーターケース(5)内を通過するよう
になっている。(1) is a wet-type electric blower that can suck air containing moisture, and is equipped with a motor (2) at the rear. The motor (2) has a rotor and a stator installed inside a motor case (5) that is connected to a rear case (3) and a motor frame (4) that closes the front opening of the rear case (3). A cooling fan (7) is pivotally attached to a rear rotating shaft (6) that protrudes rearward from the case (3). A cooling air inlet (8) is formed on the bottom surface of the rear case (3) facing the cooling fan (7), and a cooling air outlet (9) is formed on the side surface of the rear case (3). The rotation causes cooling air to pass through the motor case (5).
ijj記モーターフレーム(4)は第2図に示すように
、円it形状であって、中央にモーターの前方回転軸(
1 i))の軸受保持筒(11)を形成したデイフユ
ーザー当り面(12)と、周縁部に鍔状に形或した環状
係合用外周面(l3)とを有し、さらに前記当り面(l
2)と前記外周面(l3)との間に,前記当り面(l2
)ヒ前記外周面(l3)とを鈍角状に連続する後向きの
#i斜面(14)を環状に周設している。As shown in Figure 2, the motor frame (4) has a circular shape, with the motor's front rotation axis (4) in the center.
It has a differential user contact surface (12) forming the bearing holding cylinder (11) of 1 i)), and an annular engagement outer peripheral surface (13) shaped like a brim at the peripheral edge, and further includes the contact surface (l
2) and the outer peripheral surface (l3), the contact surface (l2)
) A rearward facing #i slope (14) continuous with the outer circumferential surface (13) at an obtuse angle is provided in an annular manner.
(15)は荊記前方回転軸(10)先端に固着される遠
心ファンで、高遠回転により中央開口(l6)から空気
を吸い込み闇囲開口(17)から空気を放射方向に排出
する。(15) is a centrifugal fan fixed to the tip of the front rotating shaft (10), which rotates at a high distance to suck in air through the central opening (16) and discharge air radially through the dark opening (17).
(l8)は前記モーターフレーム(4)のデfフユー廿
一チり面(l2)に締付螺子で締付固定されて前記遠・
C・ファン(l5)と前記モーター(2)との間に配設
される円盤状の合戊樹脂襞デイフユーザーである。(l8) is tightened and fixed to the differential face (l2) of the motor frame (4) with a tightening screw.
C. This is a disc-shaped plastic fold diff user disposed between the fan (15) and the motor (2).
(19)は前記遠心ファン(l5)及び前記デイフユー
ザー(18)を覆って前記モーターフレーム(4)に取
り付けられる金属製ファン力バーで、中央に畷気口(2
(1)を有すると共に周側面(21)に複数個の排気口
(22)・・・を所定間隔毎に有し、前記周側面(21
)の後部係合縁(23〉を前記外周面(13)に圧入し
て固定するようになっている。(19) is a metal fan power bar that is attached to the motor frame (4) over the centrifugal fan (15) and the differential user (18), and has an air vent (2) in the center.
(1) and has a plurality of exhaust ports (22) on the circumferential side (21) at predetermined intervals, and the circumferential side (21)
) is press-fitted into the outer circumferential surface (13) and fixed.
前記ディフューザー(18)において、該ディフューザ
ー(18)の前記遠心ファン(15)に対向する表面側
の−側面(24)は平板状に形威され、中・ひ部には前
記軸受保持筒(11)を遊貫する軸受孔(25)が穿設
されている。またこのディフューザー(18)の外周部
分には所定間隔をおいて該外周部分に沿って垂直状に−
fllfl面(24〉側から他側面(26)側に向がっ
て複数の外rEI縁(27)・・・が連続して形或され
、これらの外周縁(27)・・・の外面には一側面(2
4)fllがら他測面(26)側に向かって傾斜した複
数の傾斜翼部(28)・・・が形成され、これらの隣り
合う傾斜翼部(28)(28)の間に、前記外周縁(2
7)と前記ファン力バー(19)の周側面(21)との
間で囲まれる傾斜通路(2q)・・・を夫々形威してい
る。In the diffuser (18), the - side surface (24) on the surface side facing the centrifugal fan (15) of the diffuser (18) is shaped like a flat plate, and the bearing holding cylinder (11 ) is bored through the bearing hole (25). Further, along the outer circumferential portion of the diffuser (18), vertical lines are formed at predetermined intervals.
A plurality of outer rEI edges (27) are continuously formed from the fllfl surface (24> side to the other side surface (26) side, and on the outer surface of these outer peripheral edges (27)... is one side (2
4) A plurality of inclined wing portions (28) are formed which are inclined towards the other measurement surface (26) side from the full, and between these adjacent inclined wing portions (28), the outer Periphery (2
7) and the peripheral side surface (21) of the fan power bar (19).
前記傾斜翼部(28)・・・は前記他側面(26)側に
前記モーターフレーム(4)の傾斜面(14)に10う
形状のフレーム対向端(30)を有しており、これによ
り傾斜翼部(28)はモーターフレーム(4)の#i斜
面(14)の内側端(14a)から外側@(14b)ま
で延長して覆っている。The inclined wing portion (28)... has a frame-opposed end (30) having a shape of 10 mm on the inclined surface (14) of the motor frame (4) on the other side surface (26) side. The inclined wing portion (28) extends and covers the #i inclined surface (14) of the motor frame (4) from the inner end (14a) to the outer side (14b).
さらに前記傾斜翼部(28)の前記一側面(24)側に
;よ一側面(24)周縁に沿う平板状の天板部(31)
を形成しており、前記天板部(31)で始端側の一部を
覆われた前記傾斜通路(29)がポリュート室を形威し
ている。そして前記モーターフレーム(4)の傾斜面(
14)の外側端(14b)が、前記俳気口(22)のモ
ーター側開口縁に対向することで、前記傾斜通路(29
)の夫々が前記俳気口(22)に連通している。Furthermore, on the one side surface (24) side of the inclined wing portion (28); a flat top plate portion (31) along the periphery of the other side surface (24);
The inclined passage (29) whose starting end side is partially covered by the top plate (31) forms a porlute chamber. And the inclined surface of the motor frame (4) (
The outer end (14b) of the slant passageway (29) faces the motor-side opening edge of the air intake port (22).
) are in communication with the haiku port (22).
1向して電動送風機(1)を駆動すると、遠心ファン(
15)が高速回転して水分を含んだ空気をファン力バー
(21)の吸気口(20)から吸い込み、遠心ファン(
15〉の周囲開口(17〉から空気を放射方向に排出す
る。この排出された空気流は、ディフューザー(18)
の一側面(24〉からボリュート室を溝戒する傾斜通路
(29)・・・を介して排気口(22)から排気され9
o
このとき、前記モーターフレーム(4)にはディフユー
什−(18)の当り面(l2)の外周部分に傾斜面(1
4)を間設しているので,空気は抵抗を受けることなく
スムーズに排気口(22)から排出されると共に、傾斜
面(14)のために前記傾斜通路(29)が長くζ・り
、空気の動圧から静圧への変換が行なわれる。さらに傾
斜翼部(28)のフレーム対向端(30)が前記傾斜面
(l4)まで延長しているので、その分だけ前記傾斜通
路(29)が円滑に長くなり,従って空気(ま削記傾斜
通路(29)内で動圧から静圧への変換が十分に行なわ
れた後に排気口(22)から排気され、それに伴ない吸
込効率も大幅に向上する。When the electric blower (1) is driven in one direction, the centrifugal fan (
The centrifugal fan (15) rotates at high speed and sucks air containing moisture through the intake port (20) of the fan power bar (21).
Air is discharged radially through the peripheral opening (17) of the
Air is exhausted from the exhaust port (22) through an inclined passageway (29) that grooves the volute chamber from one side (24).
o At this time, the motor frame (4) has an inclined surface (1
4), the air is smoothly discharged from the exhaust port (22) without any resistance, and the inclined passageway (29) is long due to the inclined surface (14). Conversion from dynamic air pressure to static pressure takes place. Furthermore, since the end (30) of the inclined wing section (28) facing the frame extends to the inclined surface (l4), the inclined passageway (29) is smoothly lengthened by that amount, and therefore the air (machining slope After the dynamic pressure is sufficiently converted into static pressure within the passageway (29), the air is exhausted from the exhaust port (22), and the suction efficiency is also significantly improved.
また、前記モーターフレーム(4)の傾斜面(14)に
より前記傾斜通路(29)を通過する空気の排気方向が
前記排気口(22)に対して鋭角になるので、徘g+−
+(zz)の面積が小さくなっても影響が小さく、従っ
て排気口(22)を小さくすることができる。Further, since the direction of exhaust of air passing through the inclined passageway (29) is at an acute angle with respect to the exhaust port (22) due to the inclined surface (14) of the motor frame (4), the wandering g+-
Even if the area of +(zz) becomes smaller, the influence is small, and therefore the exhaust port (22) can be made smaller.
(ト)発明の効果
本発明の電動送風機は、以上の如く溝戊しており、特に
モーターフレームに形或した傾斜面によ冫、遠心ファン
から排出された空気は、モーターフレームとデイフユー
ザーとファン力バーで構戊される通路を抵抗なく流れ、
且つ動圧を静圧に変換されて排気口から排気されるので
、簡単な購或で、吸込効率を向上させることができる。(G) Effects of the Invention The electric blower of the present invention has a groove as described above, and in particular, the air discharged from the centrifugal fan is distributed between the motor frame and the differential fan by the inclined surface formed on the motor frame. Flows without resistance through the passage defined by the fan power bar,
In addition, since dynamic pressure is converted into static pressure and exhausted from the exhaust port, suction efficiency can be improved with simple purchase.
さらに、通路となる傾斜通路は、傾斜翼部のフレーム対
向端が前記傾斜面まで延長しているので、その分だけ通
路長さが長くなり、1足って前記傾斜通路内における空
気流の動圧から静圧への変換がよりよく行なわれ、従っ
て吸込効率を大幅に向上させたウェット型の電動送風機
を得ることができる。Furthermore, since the end of the inclined wing portion facing the frame extends to the inclined surface, the inclined passageway becomes longer by that amount, and the movement of the air flow within the inclined passageway increases by that amount. It is possible to obtain a wet-type electric blower in which the conversion from pressure to static pressure is better performed, and therefore the suction efficiency is significantly improved.
第l図〜第3図は本発明電動送風機の実施例に関し、第
1図は一部切欠側面図、第2図はモーターフレームの断
面図、第3図はディフューザーの図で(イ)は正面図,
(口)は背面図、(ハ)は一部It面側面図である。ま
た第4図は従来例の一部切欠側面図である。
(2)・・・モーター (4)・・・モーターフレーム
、(12)・・・デf7ユーザー当り面、(l3)・・
・外周而、(14)・・・傾斜面、(15)・・・遠心
ファン、(16)・・・吸気口, (18)・・・ディ
フューザー、(l9)・・・ファン力バー、(22)・
・・・・・排気口、(28)・・・・・・傾斜翼部、(
29)・・・傾斜通路、(30)・・・フレーム対向端
。Figures 1 to 3 relate to an embodiment of the electric blower of the present invention, in which Figure 1 is a partially cutaway side view, Figure 2 is a sectional view of the motor frame, Figure 3 is a view of the diffuser, and (A) is a front view. figure,
(opening) is a rear view, and (c) is a partial side view of the It plane. FIG. 4 is a partially cutaway side view of a conventional example. (2)...Motor (4)...Motor frame, (12)...De f7 user surface, (l3)...
・Outer periphery, (14)...Slanted surface, (15)...Centrifugal fan, (16)...Intake port, (18)...Diffuser, (l9)...Fan power bar, ( 22)・
...exhaust port, (28) ...slanted wing section, (
29)... Slanted passage, (30)... Frame opposing end.
Claims (2)
心ファンと、該遠心ファンと前記モーターとの間に配設
されたディフューザーと、中央に吸気口を、側面に複数
の排気口を夫々有し、前記遠心ファン及び前記ディフュ
ーザーを覆って前記モーターのモーターフレームに取り
付けられるファンカバーとを備え、前記モーターフレー
ムは前記ディフューザーの当り面と前記ファンカバーの
側面を圧入する外周面との間に、前記当り面と前記外周
面とを鈍角状に連続する傾斜面を周設したことを特徴と
する電動送風機。(1) A motor, a centrifugal fan fixed to the rotating shaft of the motor, a diffuser disposed between the centrifugal fan and the motor, each having an intake port in the center and a plurality of exhaust ports on the sides. a fan cover that covers the centrifugal fan and the diffuser and is attached to the motor frame of the motor, the motor frame being between the contact surface of the diffuser and the outer peripheral surface into which the side surface of the fan cover is press-fitted. An electric blower characterized in that an inclined surface is provided around the contact surface and the outer circumferential surface in an obtuse-angled manner.
側面側に向かって傾斜した複数の傾斜翼部を所定間隔を
おいて形成すると共に隣り合う傾斜翼部の間に前記排気
口に連らなる傾斜通路を形成し、前記傾斜翼部は、前記
モーターフレームの傾斜面に沿う形状のフレーム対向端
を有したことを特徴とする請求項1記載の電動送風機。(2) The diffuser has a plurality of slanted wing parts that are slanted from one side toward the other side formed at a predetermined interval on the outer circumference, and the adjacent slanted wing parts are connected to the exhaust port. 2. The electric blower according to claim 1, wherein an inclined passage is formed, and the inclined blade portion has a frame-opposed end having a shape along the inclined surface of the motor frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1151158A JP2792915B2 (en) | 1989-06-14 | 1989-06-14 | Electric blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1151158A JP2792915B2 (en) | 1989-06-14 | 1989-06-14 | Electric blower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0318699A true JPH0318699A (en) | 1991-01-28 |
| JP2792915B2 JP2792915B2 (en) | 1998-09-03 |
Family
ID=15512619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1151158A Expired - Lifetime JP2792915B2 (en) | 1989-06-14 | 1989-06-14 | Electric blower |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2792915B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04311700A (en) * | 1991-04-09 | 1992-11-04 | Mitsubishi Electric Corp | Motor fan |
| US6166462A (en) * | 1998-05-04 | 2000-12-26 | Ametek, Inc. | Bypass motor/fan assembly having separate working air passages |
| US6695580B2 (en) | 2000-11-16 | 2004-02-24 | Ametek, Inc. | Motor/fan assembly having a radial diffuser bypass |
| EP1731767A2 (en) | 2002-09-20 | 2006-12-13 | Matsushita Electric Industrial Co., Ltd. | Electric blower and vacuum cleaner using the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62291500A (en) * | 1986-06-11 | 1987-12-18 | Matsushita Electric Ind Co Ltd | electric blower |
-
1989
- 1989-06-14 JP JP1151158A patent/JP2792915B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62291500A (en) * | 1986-06-11 | 1987-12-18 | Matsushita Electric Ind Co Ltd | electric blower |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04311700A (en) * | 1991-04-09 | 1992-11-04 | Mitsubishi Electric Corp | Motor fan |
| US6166462A (en) * | 1998-05-04 | 2000-12-26 | Ametek, Inc. | Bypass motor/fan assembly having separate working air passages |
| US6695580B2 (en) | 2000-11-16 | 2004-02-24 | Ametek, Inc. | Motor/fan assembly having a radial diffuser bypass |
| EP1731767A2 (en) | 2002-09-20 | 2006-12-13 | Matsushita Electric Industrial Co., Ltd. | Electric blower and vacuum cleaner using the same |
| EP1731767A3 (en) * | 2002-09-20 | 2007-01-03 | Matsushita Electric Industrial Co., Ltd. | Electric blower and vacuum cleaner using the same |
| US7416384B2 (en) | 2002-09-20 | 2008-08-26 | Matsushita Electric Industrial Co., Ltd. | Electric blower and vacuum cleaner using same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2792915B2 (en) | 1998-09-03 |
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