JPH02153298A - Electric blower - Google Patents
Electric blowerInfo
- Publication number
- JPH02153298A JPH02153298A JP63308016A JP30801688A JPH02153298A JP H02153298 A JPH02153298 A JP H02153298A JP 63308016 A JP63308016 A JP 63308016A JP 30801688 A JP30801688 A JP 30801688A JP H02153298 A JPH02153298 A JP H02153298A
- Authority
- JP
- Japan
- Prior art keywords
- blades
- fan
- blade
- air
- short
- 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 abstract description 4
- 239000011295 pitch Substances 0.000 description 7
- 230000003247 decreasing effect Effects 0.000 description 4
- 238000007664 blowing Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 210000003746 feather Anatomy 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は電気掃除機などに使用する電動送風機に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electric blower used in a vacuum cleaner or the like.
従来の技術
従来、この種の電動送風機は特公昭５２−３８２４６号
公報に示すような構成が一般的であった。以下その構成
について図面を参照しながら説明する。BACKGROUND ART Conventionally, this type of electric blower has generally had a configuration as shown in Japanese Patent Publication No. 52-38246. The configuration will be explained below with reference to the drawings.
第５図〜６図において、モータ１の一方にエアガイド２
が設けられ、モータ１のシャフト３にはファン４が固着
されてエアガイド２の内側へおさまっている。その上方
はファンケース６で覆われ、中央部に開口５ａが設けら
れている。開口５ａに対向してファン４も吸気口４ａが
開口し、その外側に羽根４ｂが設けである。羽根４ｂの
上方と下方はプレート４Ｃと４ｄが設けられ、ファン４
の外周に排気口４ｅが形成されている。エアガイド２に
は案内羽根（固定羽根）２ａがファン４の外周に近接し
て設けられ、ファン４からの空気流をエアガイド２の下
方へ通じる連通路２ｂへ導びくべく設けられ、連通路２
ｂはエアガイド２の上方から、下方、モータ１の開口１
ａへつづいている。In Figures 5 and 6, air guide 2 is attached to one side of motor 1.
A fan 4 is fixed to the shaft 3 of the motor 1 and is housed inside the air guide 2. The upper part thereof is covered with a fan case 6, and an opening 5a is provided in the center. The fan 4 also has an air intake port 4a opening opposite to the opening 5a, and blades 4b are provided on the outside thereof. Plates 4C and 4d are provided above and below the blade 4b, and the fan 4
An exhaust port 4e is formed on the outer periphery of the exhaust port 4e. Guide vanes (fixed vanes) 2a are provided in the air guide 2 in close proximity to the outer periphery of the fan 4, and are provided to guide the air flow from the fan 4 to a communication path 2b leading downward from the air guide 2. 2
b is from the top of the air guide 2 to the bottom, the opening 1 of the motor 1
It continues to a.
発明が解決しようとする課題
このような電動送風機は、ファン４の回転により、空気
がファンケースの開口５ａから吸気口４ａ、ファン４内
部へと吸い込まれ、羽根４ｂに押されて、排気口４ｅか
らエアガイド２ヘ エアガイド２では案内羽根２ａによ
り、連通路２ｂへ導びが３ ・＼−７
れ、エアガイド２の裏側へ回シ込みモータ１の開口１ａ
へ流れていく。Problems to be Solved by the Invention In such an electric blower, as the fan 4 rotates, air is sucked from the opening 5a of the fan case through the intake port 4a and into the fan 4, is pushed by the blades 4b, and is drawn into the exhaust port 4e. From the air guide 2 to the air guide 2, the guide vane 2a guides the air to the communication path 2b, and the air guide 2 is guided to the back side of the air guide 2 through the opening 1a of the motor
flowing to.
電気掃除機などに用いる電動送風機は、小形で強い吸込
力が必要なため、高速でファン４を回転させる。このた
め、羽根４ｂに押された空気は非常な高速でファン４か
ら排出され、それが案内羽根２ａの先端へぶつかる。従
来の場合、ファン４の直径は約１１０ｆｆｌｆｆ、回転
数は約３万回転毎分であシ、ファン４の外周スピードは
約６２２ Ｋｍ毎時という高いスピードになる。これだ
けの高いスピードで羽根４ｂにより、空気が案内羽根２
ａに次々とぶつかってくるため、案内羽根２ａでは、羽
根４ｂの枚数Ｚ×ファン４の回転数Ｎ−ＮＺの周波数で
騒音が発生する。従来の場合羽根４ｂの枚数は６枚であ
り、Ｚ−６として、ＮＺ＝６Ｘ３万回転毎分＝１８万毎
分−３■の騒音が発生する。An electric blower used in a vacuum cleaner or the like is small and requires a strong suction force, so the fan 4 is rotated at high speed. Therefore, the air pushed by the blades 4b is discharged from the fan 4 at a very high speed and hits the tip of the guide blade 2a. In the conventional case, the diameter of the fan 4 is about 110 fflff, the rotation speed is about 30,000 revolutions per minute, and the outer peripheral speed of the fan 4 is as high as about 622 km/hour. At such a high speed, the air is moved to the guide vane 2 by the vane 4b.
Since the guide blades 2a collide with the guide blades 2a one after another, noise is generated at a frequency equal to the number Z of the blades 4b x the number of rotations N-NZ of the fan 4. In the conventional case, the number of blades 4b is 6, and as Z-6, a noise of NZ = 6 x 30,000 revolutions per minute = 180,000 revolutions per minute -3 is generated.
３曲の周波数は、人間の耳には聞こえやすい音であり、
うるさいという欠点があった。The frequencies of the three songs are sounds that are easy for the human ear to hear,
It had the drawback of being noisy.
これを解決するため、第７図に示すように、羽根４ｂの
枚数を増しく９枚）、さらに１羽根４ｂの中間に、短か
い羽根４ｆを設けて、ファン４外周での羽根枚数Ｚを多
くしたものも考えられている。この場合ＮＺは、回転数
Ｎを３万回転毎分、Ｚを９枚Ｘ２＝１８枚とすると、Ｎ
Ｚ＝１８Ｘ３万回転毎分＝５４万毎分＝９曲となり、人
の耳には聞こえにくくなるとともに、羽根４ｂ、４ｆで
空気をこきざみに排出するため、案内羽根２ｄへ羽根４
ｂと４ｆからの空気のぶつかる衝撃の変化（羽根の表側
では、羽根に押され圧縮された空気が、羽根の裏側では
、すこし薄めの空気が案内羽根２ａにぶつかってくるが
、その空気圧の変化）が小さくなシ、音圧が低下するた
め、騒音値が低下する。さらには、モータ１から排出後
、掃除機内部で吸音材にて、消音する場合、低周波音よ
り、高周波音の方が一般的に吸音しやすいため、静かな
電気掃除機を得ることができる。In order to solve this problem, as shown in FIG. 7, the number of blades 4b is increased (9 blades), and a short blade 4f is provided in the middle of each blade 4b to reduce the number Z of blades on the outer periphery of the fan 4. A larger number is also being considered. In this case, NZ is N if the number of revolutions N is 30,000 revolutions per minute and Z is 9 sheets x 2 = 18 sheets.
Z =18
Changes in the impact of air colliding with air from b and 4f (on the front side of the blade, the air pushed and compressed by the blade hits the guide blade 2a, and on the back side of the blade, slightly thinner air hits the guide blade 2a, but the air pressure changes) ) is small, the sound pressure decreases, so the noise value decreases. Furthermore, if the sound is muffled with sound-absorbing material inside the vacuum cleaner after it is discharged from the motor 1, high-frequency sounds are generally more easily absorbed than low-frequency sounds, making it possible to obtain a quiet vacuum cleaner. .
ところが、これを実際に測定してみると、第８図に示す
ように、（横軸は周波数（ｋｌ（Ｚ）、縦軸は音圧レベ
ル）ＮＺ音以外に、ＮＺｘ％の騒音（約４．５ｋＨｚ）
が発生しておシ、しかも、そのレベルは５Ｉ＼−／
ＮＺ音（約９ｋｌ（Ｚ）よシも高く、耳によく聞こえる
騒音である。However, when this was actually measured, as shown in Figure 8, in addition to the NZ sound (the horizontal axis is the frequency (kl(Z), the vertical axis is the sound pressure level), there was a noise of NZx% (approximately 4 .5kHz)
Moreover, the level of the noise is as high as 5I\-/NZ sound (approximately 9kL (Z)), and it is a noise that can be easily heard.
このように、従来の電気掃除機用電動送風機は、人の耳
によく聞える周波数のファン騒音が発生し、静かな掃除
機を得るためには、防音、消音にコストをかけねばなら
ないという欠点があった。As described above, conventional electric blowers for vacuum cleaners generate fan noise at a frequency that is easily audible to the human ear, and in order to obtain a quiet vacuum cleaner, the disadvantage is that it is necessary to spend money on soundproofing and silencing. there were.
本発明は、上記従来の課題を解決するものであり、静か
な電動送風機を提供することを目的とするものである。The present invention solves the above-mentioned conventional problems, and aims to provide a quiet electric blower.
課題を解決するだめの手段
上記問題点を解決するため本発明は、ファンの長い羽根
の間の外周部に短かい羽根を設け、この短かい羽根の外
周ピッチは長い羽根と同一にし、短かい羽根の内側ピッ
チを長い羽根の表側へ近寄らせたものである。Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides short blades on the outer periphery between the long blades of the fan. The inner pitch of the blades is brought closer to the front side of the long blades.
作 用
上記構成により、ファン外周では、短かい羽根からも、
長い羽根からも同一の空気密度で、同一ピッチで空気が
排出されるため、案内羽根で発生する騒音はＮＺ音だけ
になる。従来のようなＮＺＸ％音がなくなシ、高周波音
だけのため、人の耳には聞こえにりく、かつ、消音しや
すい周波数のため、静かな機器を提供することができる
。Function: With the above configuration, on the outer periphery of the fan, even from short blades,
Since air is discharged from the long blades at the same air density and at the same pitch, the only noise generated by the guide blades is the NZ sound. There is no NZX% sound like in the past, and only high-frequency sounds are used, making it difficult for the human ear to hear and having frequencies that are easy to muffle, making it possible to provide a quiet device.
実施例 以下、本発明の一実施例を図面に基づいて説明する。Example Hereinafter, one embodiment of the present invention will be described based on the drawings.
第１図〜２図において、モータ１１の・一方にエアガイ
ド１２が設けられ、モータ１１のシャフト１３にはファ
ン１４が固着されてエアガイド１２の内側におさまって
いる。、その上方はファンケス１５で覆われ、中央部に
開口１５ａが設けである。開口１５ａに対向して、ファ
ン１４には吸気口１４ａが開口し、その外側に艮い羽根
１４ｂが設けである。長い羽根１４ｂの上、下には前プ
レート（中央に吸気口１４ａを開口）１４ｃと後グレー
ト１４ｄが設けられ、ファン１４の外周に排気口１４ｅ
を形成している。艮い羽根１４ｂの間に短い羽根１４ｆ
が設けられ、そのピッチは、外周部で長い羽根１４ｂの
中間に、内側で長い羽根１４ｂの中間（細線で図示）よ
シも、羽根１４ｂ７”−７
の表面側（回転時、羽根によって空気を押し付ける側）
へ近寄せである。エアガイド１２には案内羽根１２＆が
ファン１４の外周に近接して設けられ、ファン１４から
の空気流をエアガイド１２の下方へ通じる連通路１２ｂ
へ導びくべく設けられ、連通路１２ｂはエアガイド１２
の上方（ファン１４側）から、下方、モータ１１の開口
１１ａへつづいている。1 and 2, an air guide 12 is provided on one side of the motor 11, and a fan 14 is fixed to the shaft 13 of the motor 11 and is housed inside the air guide 12. The upper part thereof is covered with a fan case 15, and an opening 15a is provided in the center. Opposed to the opening 15a, the fan 14 has an air intake port 14a, and a blade 14b is provided on the outside of the air intake port 14a. A front plate 14c (with an intake port 14a in the center) and a rear grate 14d are provided above and below the long blade 14b, and an exhaust port 14e is provided on the outer periphery of the fan 14.
is formed. A short blade 14f is inserted between the long blades 14b.
are provided at the pitch between the long blades 14b on the outer periphery, in the middle of the long blades 14b on the inside (illustrated with a thin line), and on the surface side of the blades 14b7''-7 (during rotation, air is pumped by the blades). pressing side)
It's getting closer. The air guide 12 is provided with guide vanes 12& close to the outer periphery of the fan 14, and a communication path 12b that communicates the air flow from the fan 14 to the lower part of the air guide 12.
The communication path 12b is provided to guide the air guide 12.
The opening 11a of the motor 11 continues from the top (fan 14 side) to the bottom.
上記構成により、モータ１１の運転により、シャフト１
３とともにファン１４が回転する。空気はファンケース
１５の開口１５ａから、ファン１４の吸気口１４ａに吸
い込まれ、ファン１４の内部を通って外周の排気口１４
ｅよ砂排出される。エアガイド１２では案内羽根１２ａ
に導びかれ、連通路１２ｂよシェアガイド１２の下方、
モータ１１の開口１１ａへ流れる。With the above configuration, the operation of the motor 11 causes the shaft 1 to
3 and the fan 14 rotates. Air is sucked into the intake port 14a of the fan 14 from the opening 15a of the fan case 15, passes through the inside of the fan 14, and exits to the exhaust port 14 on the outer periphery.
e, the sand is discharged. In the air guide 12, the guide vane 12a
guided by the communication path 12b, below the shear guide 12,
It flows to the opening 11a of the motor 11.
第３図でファン１４内部の空気の流れを説明すると、フ
ァン１４の回転により（反時計回、！１ｌｌ）、長い羽
根１４ｂ、短い羽根１４ｆが空気を押して、その羽根の
表面に沿って空気を外周方向へ押し出してゆく。つまり
、空気は羽根の表面（羽根の回転方向側の面）で押され
、裏側は空気から逃げてゆく運動となる。このため、空
気の密度を点にて表現すると、ファン１４の吸気口付近
では全体に均一だが、外周へ向かうほどファン１４の回
転による加速度で、長い羽根１４ｂの表面の密度が犬と
なる。短い羽根１４ｆの内周部では、空気は長い羽根１
４ｂの表面で少し濃く、裏側で少し薄くなっている。こ
れを細線で示した長い羽根１４ｂと等ピッチで分割する
と、短い羽根の表面側へは少し薄い空気が流れ込み、裏
側へは少し濃い空気が流れ込んで、ファン１４の外周か
ら排出される空気密度が短い羽根１４ｆの表面側と裏側
では異なってしまう。これがＮＺｘ％の原因であり、本
実施例はこれを防止するため、短い羽根１４ｆの内周（
入口部）を、長い羽根１４ｂの表面側へ近寄せである。To explain the flow of air inside the fan 14 with reference to FIG. 3, as the fan 14 rotates (counterclockwise, !1ll), the long blades 14b and short blades 14f push the air, and the air flows along the surfaces of the blades. Push it out towards the outer periphery. In other words, the air is pushed by the surface of the blade (the surface facing the blade in the direction of rotation), and the back side moves away from the air. Therefore, if the density of the air is expressed as a point, it is uniform throughout near the intake port of the fan 14, but as it moves toward the outer periphery, the density on the surface of the long blade 14b becomes dog-like due to the acceleration caused by the rotation of the fan 14. At the inner circumference of the short blade 14f, the air flows through the long blade 1.
It is a little darker on the surface of 4b and a little lighter on the back. If this is divided into equal pitches with the long blades 14b shown by thin lines, slightly thinner air will flow into the front side of the short blades, and slightly denser air will flow into the back side of the short blades, and the density of the air discharged from the outer periphery of the fan 14 will decrease. The front side and the back side of the short blade 14f are different. This is the cause of NZx%, and in order to prevent this in this embodiment, the inner periphery of the short blade 14f (
The inlet portion) is brought closer to the surface side of the long blade 14b.
このため、短い羽根１４ｆの表面側の少し薄い空気は多
くと９込み、裏側の少し濃い空気は少なくとシ込んで、
表側と裏側の取り込み空気量を同一にしている。これが
ファン外周へ行９”−／
くと、長い羽根１４ｂの表面で濃い、短い羽根１４ｆの
裏側で薄い、短い羽根１４ｆの表面で濃い、長い羽根１
４ｂの裏側で薄い、と同一の変化パターンとなシ、しか
も、排気口１４ｅでの羽根１４ｂ、１４ｆのピッチが同
一なため、案内羽根１２ａではＮＺ音しか発生しない。For this reason, the slightly thinner air on the front side of the short blade 14f is packed in at most 9, and the slightly denser air on the back side is squeezed in at least 9.
The amount of air taken in on the front and back sides is the same. When this goes to the outer circumference of the fan 9"-/, the surface of the long blade 14b is dark, the back side of the short blade 14f is thin, the surface of the short blade 14f is dark, and the long blade 1
Since the change pattern is the same as that of the guide blade 12a, and the pitch of the blades 14b and 14f at the exhaust port 14e is the same, only NZ sound is generated in the guide blade 12a.
実験によれば、ファン外径を１０９朋、回転数を３万２
千回転毎分にし、羽根枚数を長い羽根９枚、短い羽根９
枚、短い羽根の長さを長い羽根の約半分にしだ所、短い
羽根の入口の表面と裏側の面積比を１．２ ： １にす
ると、第４図に示すように、ＮＺＸ３Ａ騒音はほとんど
なくなった。面積比が１．１：１以下の場合は、ＮＺｘ
Ａ音はほとんど低下せず、また、１．４ ： １以上の
場合は、全体の風量が低下して、送風効率が大きく低下
した。また、短かい羽根を長くして、長い羽根と同一長
さにすればＮＺ音しか発生しないが、吸気口部のせまい
所に、多数の羽根が並ぶため、通気抵抗が大きくなり、
送風効率が低下した。According to experiments, the outer diameter of the fan was 109mm and the rotation speed was 32,000mm.
1,000 revolutions per minute, and the number of blades is 9 long blades and 9 short blades.
When the length of the short blades is reduced to about half that of the long blades, and the area ratio between the front and back sides of the inlet of the short blades is set to 1.2:1, the NZX3A noise almost disappears, as shown in Figure 4. Ta. If the area ratio is 1.1:1 or less, NZx
The A sound hardly decreased, and when the ratio was 1.4:1 or more, the overall air volume decreased and the air blowing efficiency decreased significantly. Also, if you make the short blades longer and make them the same length as the long blades, only NZ noise will be generated, but since there are many blades lined up in the narrow area of the intake port, ventilation resistance will increase.
Air blowing efficiency has decreased.
なお、説明よシ明らかなように、短かい羽根が、さらに
短かい場合は、ファンの排気口での空気量を均一にする
ため、短い羽根の入口部をもつと長い羽根の表面へ近づ
ける必要があり、面積比をもっと大きくしなければなら
ない。面積比をあまり大きくすると、先に述べたように
、空気流のじゃまになシ、送風効率が低下する。実験に
よれば。As is clear from the explanation, if the short blades are even shorter, the inlet of the short blade needs to be brought closer to the surface of the long blade in order to equalize the amount of air at the fan's exhaust port. Therefore, the area ratio must be made larger. If the area ratio is too large, the air flow will be hindered and the air blowing efficiency will be reduced, as mentioned above. According to experiments.
短い羽根を長い羽根の３分の１程度まで短かくしても、
騒音の発生と、効率は良好に保たれた。Even if the short feathers are shortened to about one-third of the long feathers,
Noise generation and efficiency were maintained well.
また逆に、短かい羽根がさらに長い（長い羽根よシは短
かいが）場合は、面積比はもっと小さくても、ＮＺｘ％
騒音を低下させることができる。Conversely, if the short blade is even longer (although the long blade is shorter), even if the area ratio is smaller, the NZx%
Noise can be reduced.
従来の短い羽根のあるファンにくらべ ＮＺｘ％を低下
させることができるとともに、短い羽根のないファンと
くらべると、周波数を高くして、耳に聞こえにくくシ、
かつ消音をやり易くするとともに、短い羽根のないファ
ンでは、羽根と羽根のピッチが太きいため、空気の濃い
、薄いの差が大きくなって高い騒音になっていたが、本
願は小きざみに空気を送るため濃い、薄いの差が小さく
でき、音圧レベルも低下させられる。Compared to conventional fans with short blades, it can lower NZx%, and compared to fans without short blades, it can raise the frequency and make it harder to hear.
In addition to making it easier to muffle noise, fans without short blades have a wide pitch between the blades, which increases the difference between dense and thin air, resulting in high noise. Since the sound is transmitted, the difference between dark and light can be reduced, and the sound pressure level can also be lowered.
１１’−−’
発明の効果
以上のように、本発明によれば、電動送風機のファンの
羽根を長い羽根と、その長い羽根の間ファン外周に設け
た短かい羽根で構成し、短かい羽根の外周は長い羽根と
同一形状、同一ピッチとし、その内周を長い羽根の回転
方向面へ近寄せて配置することにより、電動送風機の騒
音を低下させることができ、しかも防音、吸音仕様が簡
単にできるため、低コストな電気掃除機などの機器を実
現することができるものである。11'--' Effects of the Invention As described above, according to the present invention, the blades of the fan of an electric blower are composed of long blades and short blades provided on the outer periphery of the fan between the long blades. The outer periphery of the fan has the same shape and pitch as the long blade, and by placing the inner periphery close to the rotating direction of the long blade, the noise of the electric blower can be reduced, and soundproofing and sound absorption specifications can be easily achieved. This makes it possible to realize low-cost equipment such as vacuum cleaners.
第１図は本発明の実施例を示す電動送風機の部分欠截断
面図、第２図は同ファン部の上面図、第３図は同ファン
の部分拡大図、第４図は同騒音の・スペクトル図、第６
図は従来例を示す電動送風機の部分欠截断面図、第６図
は同ファンの上面図、第７図は従来の他の例を示すファ
ンの上面図、第８図は同騒音のスペクトル図である。
１１・・・・・・モータ、１４・・・・・ファン、１４
ｂ・・・・・・長い羽根、１４Ｇ・・・・・・前プレー
ト、１４ｄ・・・・・・後プレート、１４ｆ・・・・・
・短い羽根。
代理人の氏名 弁理士 粟 野 重 孝 はが１名第
図
第
図
ｂ
第
図Fig. 1 is a partially cutaway sectional view of an electric blower showing an embodiment of the present invention, Fig. 2 is a top view of the fan section, Fig. 3 is a partially enlarged view of the fan, and Fig. 4 is a noise-emitting device of the same type. Spectrum diagram, 6th
The figure is a partially cutaway sectional view of a conventional electric blower, Figure 6 is a top view of the same fan, Figure 7 is a top view of another conventional fan, and Figure 8 is a spectrum diagram of the same noise. It is. 11...Motor, 14...Fan, 14
b...Long blade, 14G...Front plate, 14d...Rear plate, 14f...
・Short feathers. Name of agent: Patent attorney Shigetaka Awano (1 person) Fig. Fig. b Fig.
Claims (1)
ファンは前・後プレート間に複数の羽根を配設して構成
され、かつこれら羽根は複数の長い羽根と、その間の外
周側に設けられた短かい羽根とからなり、さらに短い羽
根の外周は長い羽根と同一形状、同一ピッチにし、しか
も短い羽根の内周は、長い羽根の回転方向面へ近寄せて
配設した電動送風機。The fan is equipped with a centrifugal fan driven by a motor, and the fan is composed of a plurality of blades arranged between front and rear plates, and these blades are provided with a plurality of long blades and an outer peripheral side between them. An electric blower consists of two short blades, the outer periphery of the shorter blades is the same shape and the same pitch as the long blades, and the inner periphery of the short blades is placed close to the rotational direction of the long blades.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63308016A JPH0759957B2 (en) | 1988-12-06 | 1988-12-06 | Electric blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63308016A JPH0759957B2 (en) | 1988-12-06 | 1988-12-06 | Electric blower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02153298A true JPH02153298A (en) | 1990-06-12 |
| JPH0759957B2 JPH0759957B2 (en) | 1995-06-28 |
Family
ID=17975873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63308016A Expired - Fee Related JPH0759957B2 (en) | 1988-12-06 | 1988-12-06 | Electric blower |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0759957B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009275562A (en) * | 2008-05-13 | 2009-11-26 | National Institute Of Advanced Industrial & Technology | Gas pump |
| JP4670175B2 (en) * | 2001-05-11 | 2011-04-13 | 株式会社豊田中央研究所 | Centrifugal compressor impeller |
| JP2011202560A (en) * | 2010-03-25 | 2011-10-13 | Panasonic Corp | Electric blower and electric vacuum cleaner using the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6218397U (en) * | 1985-07-19 | 1987-02-03 |
-
1988
- 1988-12-06 JP JP63308016A patent/JPH0759957B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6218397U (en) * | 1985-07-19 | 1987-02-03 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4670175B2 (en) * | 2001-05-11 | 2011-04-13 | 株式会社豊田中央研究所 | Centrifugal compressor impeller |
| JP2009275562A (en) * | 2008-05-13 | 2009-11-26 | National Institute Of Advanced Industrial & Technology | Gas pump |
| JP2011202560A (en) * | 2010-03-25 | 2011-10-13 | Panasonic Corp | Electric blower and electric vacuum cleaner using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0759957B2 (en) | 1995-06-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |