JP2568573B2 - Fan - Google Patents
FanInfo
- Publication number
- JP2568573B2 JP2568573B2 JP62210516A JP21051687A JP2568573B2 JP 2568573 B2 JP2568573 B2 JP 2568573B2 JP 62210516 A JP62210516 A JP 62210516A JP 21051687 A JP21051687 A JP 21051687A JP 2568573 B2 JP2568573 B2 JP 2568573B2
- Authority
- JP
- Japan
- Prior art keywords
- guard
- impeller
- side guard
- discharge
- blade
- 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 - Lifetime
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06D—MEANS FOR GENERATING SMOKE OR MIST; GAS-ATTACK COMPOSITIONS; GENERATION OF GAS FOR BLASTING OR PROPULSION (CHEMICAL PART)
- C06D5/00—Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets
- C06D5/06—Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets by reaction of two or more solids
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Organic Chemistry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、家庭用の扇風機に関するものである。Description: TECHNICAL FIELD The present invention relates to a domestic fan.
従来の技術 従来、この種の扇風機は軸方向の厚みが大きく製品の
薄型化が要望されていた。そのため従来の扇風機では、
第６図および第７図に示すように、電動機１と、上記電
動機１で駆動される羽根車２と、上記電動機１に取付け
られた吸込側ガード３と、上記吸込側ガード３に取付け
られた吐出側ガード４を、おのおの薄くし、製品厚みを
薄くしようとするものであった。2. Description of the Related Art Conventionally, this type of electric fan has a large thickness in the axial direction, and there has been a demand for a thin product. Therefore, with conventional fans,
As shown in FIGS. 6 and 7, an electric motor 1, an impeller 2 driven by the electric motor 1, a suction-side guard 3 attached to the electric motor 1, and an attachment to the suction-side guard 3 are provided. Each of the discharge side guards 4 is intended to be thinner to reduce the product thickness.
発明が解決しようとする問題点 従来の扇風機では、羽根車２と吸込側ガード３および
吐出側ガード４との間隙が小さいため騒音が大きくなる
という問題点を有していた。また、騒音をできるだけ低
く抑えるために、上記羽根車２のブレード５の取付角を
大きくし低回転で運転しているため羽根車の軸方向厚み
が増加し、吐出流れの回転方向への旋回が大きく、吐出
側の風速が劣り吐出流れの到達距離が小さくなる問題が
あった。Problems to be Solved by the Invention The conventional fan has a problem that noise is increased because the gap between the impeller 2 and the suction-side guard 3 and the discharge-side guard 4 is small. In addition, in order to keep the noise as low as possible, the mounting angle of the blade 5 of the impeller 2 is increased, and the blade is operated at a low rotation speed. However, there is a problem that the wind speed on the discharge side is inferior and the reach of the discharge flow is short.
本発明は、このような問題点を解決するもので、騒音
を低下させるとともに羽根車の軸方向厚みを薄くし、吐
出風速を大きくした扇風機を提供することを目的とす
る。An object of the present invention is to solve such a problem, and an object of the present invention is to provide a fan that reduces noise, reduces the axial thickness of an impeller, and increases the discharge air velocity.
問題点を解決するための手段 この問題点を解決するために本発明は、扇風機の軸流
型の羽根車の前後に、略放射状のガード片を有する吸込
側ガードおよび吐出側ガードを取り付け、前記吸込側ガ
ードのガード片は、上記羽根車のブレードの吸込側端面
と15°以上の交差角を有し、かつ、上記羽根車の回転方
向と逆に軸方向に５°〜30°の傾斜角を有し、また上記
吐出側ガードのガード片は、上記羽根車のブレードの吐
出側端面と15°〜165°の交差角を有し、かつ、上記吐
出側ガードの軸方向幅は5mm以上あり、かつ、ガード間
隔に対する比を0.3以上としたものである。Means for Solving the Problems In order to solve this problem, the present invention attaches a suction side guard and a discharge side guard having substantially radial guard pieces before and after an axial impeller of a fan, The guard piece of the suction side guard has an intersection angle of 15 ° or more with the suction side end face of the blade of the impeller, and a tilt angle of 5 ° to 30 ° in the axial direction opposite to the rotation direction of the impeller. The guard piece of the discharge side guard has an intersection angle of 15 ° to 165 ° with the discharge side end face of the blade of the impeller, and the axial width of the discharge side guard is 5 mm or more. In addition, the ratio to the guard interval is set to 0.3 or more.
作用 この構成により、ガードに交差角を設けているため、
吸込側より吸引された空気は、ブレードと吸込側ガード
とで音の位相がずれて吸引され、また羽根車より吐出さ
れた空気は、音の位相がずれるとともに、吐出側ガード
により中心方向へ導かれながら吐出される。また吸引空
気は回転方向と逆に旋回して羽根車に入ってくる。Action With this configuration, the guard has a crossing angle,
The air sucked in from the suction side is sucked out of phase with the sound between the blade and the suction side guard, and the air discharged from the impeller is out of phase with the sound and guided toward the center by the discharge side guard. It is discharged while being cut. The suction air turns in the opposite direction to the rotation direction and enters the impeller.
実施例 以下、本発明の一実施例を第１図〜第３図にもとづき
説明するが、従来例と同一箇所には同一番号を付し、詳
細な説明は省略する。図において、１はスタンド６に取
付けられた電動機で、軸流型の羽根車２を回転させる。
３は上記羽根車２の後方を覆うように、上記電動機１に
取付けられた吸込側ガード、４は上記吸込側ガードに、
上記羽根車２の前方を覆うように取付けられた吐出側ガ
ードである。上記羽根車２は通常、羽根ボス10に対しブ
レード５が取付角θで取付けられており、吸込側端面よ
り空気を吸引し、吐出側端面より空気を吐出する。上記
吸込側ガード３および吐出側ガード４は、第１図に示す
ように、円環８とマーク９との間を、多数のガード片７
で連結されて構成されているが、上記吸込側ガード３の
ガード片７は、上記ブレード５の吸込側端面上のどの位
置でも、15°〜165°の交差角αを持つように、また上
記吐出側ガード４のガード片７も、上記ブレード５の吐
出側端面上のどの位置でも、15°〜165°の交差角βを
持つように構成されている。また、上記吸込側ガード
は、（第２図a,b）に示すように、5mm以上の軸方向幅ａ
を有し、上記羽根車の回転方向とは逆に、軸方向に５°
〜30°の傾斜角γを設けてある。Embodiment Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3. The same parts as those in the conventional example will be denoted by the same reference numerals, and detailed description will be omitted. In the figure, reference numeral 1 denotes an electric motor mounted on a stand 6 for rotating an axial impeller 2.
3 is a suction side guard attached to the electric motor 1 so as to cover the rear of the impeller 2, 4 is a suction side guard,
It is a discharge side guard attached so as to cover the front of the impeller 2. In the impeller 2, the blade 5 is usually attached to the blade boss 10 at an attachment angle θ, and sucks air from the suction side end face and discharges air from the discharge side end face. As shown in FIG. 1, the suction side guard 3 and the discharge side guard 4 divide a large number of guard pieces 7 between the ring 8 and the mark 9.
The guard piece 7 of the suction side guard 3 has a crossing angle α of 15 ° to 165 ° at any position on the suction side end face of the blade 5, and The guard piece 7 of the discharge side guard 4 is also configured to have an intersection angle β of 15 ° to 165 ° at any position on the discharge side end face of the blade 5. The suction side guard has an axial width a of 5 mm or more, as shown in FIGS.
5 ° in the axial direction, opposite to the rotation direction of the impeller
An inclination angle γ of up to 30 ° is provided.
上記構成において、電動機１によって羽根車２が回転
すると、吸込側ガード３より吸引された空気は、上記羽
根車２のブレード５の吸込側端面と吸込側ガードとの間
隙ａで圧縮され、通常回転音と呼ばれる特定周波数の音
が発生するが、上記吸込側ガード３とブレード５の端面
との交差角αが15°以上あるので回転音に時間的な遅れ
を生じ軽減される。また羽根車を通ったあとの吐出流れ
は、上記ブレード５の吐出側端面と吐出側ガードとの間
隙ｂで圧縮され、同様に回転音が発生するが、上記吐出
側ガード４と上記ブレード５の吐出側端面との交差角β
も15°以上あるので回転音が軽減される。In the above configuration, when the impeller 2 is rotated by the electric motor 1, the air sucked from the suction-side guard 3 is compressed in the gap a between the suction-side end face of the blade 5 of the impeller 2 and the suction-side guard, and is normally rotated. Although a sound of a specific frequency called a sound is generated, since the intersection angle α between the suction side guard 3 and the end face of the blade 5 is 15 ° or more, a time delay is generated in the rotation sound and the rotation sound is reduced. The discharge flow after passing through the impeller is compressed by the gap b between the discharge-side end face of the blade 5 and the discharge-side guard, and a similar rotation noise is generated. Intersection angle β with discharge side end face
Is more than 15 °, so the rotation noise is reduced.
一般に、軸流型羽根車の吐出流れは、通常旋回成分を
持つが、この旋回成分は小さい程望ましい。そのため、
吸込側ガードを、上記羽根車の回転方向と逆に、軸方向
に５°〜30°の傾斜角γを設けてあるので、上記羽根車
を通ったあとの吐出流れは、旋回成分は小さくなる。ま
た上記吐出側ガード４は軸方向に5mm以上の長さｌを有
し、ガードの一片７の間隔ｔに対する比を0.3以上とし
ているので、第４図に示すように十分な風速を得ること
ができ、また、若干の旋回成分を有する吐出流れは、上
記ガードの一片７にぶつかり軸方向に誘導される。また
上記吐出側ガードは、単に放射状でなく回転方向と逆に
ひねられているので、上記ガードの一片７にぶつかった
吐出流れは、中心方向成分Ｃを持ち中心方向にも誘導さ
れる。この結果、扇風機の吐出側の羽根径の３倍位置
（JIS測定）で計測した風速分布は第５図のような風速
型となる。Generally, the discharge flow of the axial flow impeller usually has a swirl component, and the smaller the swirl component, the better. for that reason,
Since the suction side guard is provided with an inclination angle γ of 5 ° to 30 ° in the axial direction opposite to the rotation direction of the impeller, the discharge flow after passing through the impeller has a small swirling component. . In addition, since the discharge side guard 4 has a length 1 of 5 mm or more in the axial direction and a ratio of the guard piece 7 to the interval t of 0.3 or more, a sufficient wind speed can be obtained as shown in FIG. The discharge flow which can be generated and has a slight swirl component strikes the guard piece 7 and is guided in the axial direction. Further, since the discharge side guard is not merely radial but twisted in the direction opposite to the rotation direction, the discharge flow hitting the piece 7 of the guard has a central component C and is guided in the central direction. As a result, the wind speed distribution measured at a position (JIS measurement) three times the diameter of the blade on the discharge side of the electric fan becomes a wind speed type as shown in FIG.
発明の効果 以上のように本発明によれば、扇風機の薄型化を行う
ために羽根車とガードとの間隙を近づけても、騒音が上
昇せず、出口の風速が上昇し、到達距離の長い風速とな
る効果が得られる。Effects of the Invention As described above, according to the present invention, even when the gap between the impeller and the guard is reduced in order to reduce the thickness of the fan, the noise does not increase, the wind speed at the outlet increases, and the reaching distance is long The effect of the wind speed is obtained.
第１図ａは本発明の一実施例による扇風機を示す吐出側
正面図、第１図ｂは同扇風機を示す吸込側正面図、第２
図ａは同扇風機を示す側断面図、第２図ｂは同扇風機の
吸込側ガードの傾斜を示す図、第３図は同扇風機の吐出
側ガードでの流れを示す図、第４図は吐出側のガード間
隔と最大風速の関係を示す図、第５図は本発明の従来例
との風速曲線の比較図、第６図は従来の扇風機の正面
図、第７図は同扇風機の側断面図である。 ２……羽根車、３……吸込側ガード、４……吐出側ガー
ド、５……ブレード。1a is a front view of a discharge side showing a fan according to an embodiment of the present invention, FIG. 1b is a front view of a suction side showing the same fan, FIG.
Fig. A is a side sectional view showing the fan, Fig. 2b is a diagram showing the inclination of the suction side guard of the fan, Fig. 3 is a diagram showing the flow at the discharge side guard of the fan, and Fig. 4 is the discharge. FIG. 5 is a diagram showing the relationship between the guard interval on the side and the maximum wind speed, FIG. 5 is a comparison diagram of a wind speed curve with the conventional example of the present invention, FIG. FIG. 2 ... impeller, 3 ... suction side guard, 4 ... discharge side guard, 5 ... blade.
Claims (1)
ド片を有する吸込側ガードおよび吐出側ガードを取り付
け、上記吸込側ガードのガード片は5mm以上の軸方向幅
を有し、上記羽根車のブレードの吸込側端面と15°以上
の交差角を設け、かつ、上記羽根車の回転方向と逆に軸
方向に５°〜30°の傾斜角を設け、また上記吐出側ガー
ドのガード片は上記羽根車のブレードの吐出側端面と15
°〜165°の交差角を設け、かつ上記吐出側ガードの軸
方向幅は5mm以上とし、かつ、ガード間隔に対する比を
0.3以上とした扇風機。1. A suction side guard and a discharge side guard having substantially radial guard pieces are attached before and after an axial flow impeller, and the guard piece of the suction side guard has an axial width of 5 mm or more, Provide an intersection angle of 15 ° or more with the suction side end face of the blade of the impeller, and provide an inclination angle of 5 ° to 30 ° in the axial direction opposite to the rotation direction of the impeller, and The guard piece is in contact with the discharge side end face of the impeller blade.
A crossing angle of ° to 165 ° is provided, and the axial width of the discharge side guard is 5 mm or more, and the ratio to the guard interval is
Electric fan with 0.3 or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62210516A JP2568573B2 (en) | 1987-08-25 | 1987-08-25 | Fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62210516A JP2568573B2 (en) | 1987-08-25 | 1987-08-25 | Fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6453093A JPS6453093A (en) | 1989-03-01 |
| JP2568573B2 true JP2568573B2 (en) | 1997-01-08 |
Family
ID=16590663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62210516A Expired - Lifetime JP2568573B2 (en) | 1987-08-25 | 1987-08-25 | Fan |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2568573B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5877923B1 (en) * | 2015-08-13 | 2016-03-08 | 株式会社Ｃｍｃ | Fan |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4845953U (en) * | 1971-09-29 | 1973-06-15 | ||
| JPS57198394A (en) * | 1981-04-22 | 1982-12-04 | Hitachi Ltd | Air blower guard |
| JPS57186091A (en) * | 1981-05-12 | 1982-11-16 | Hitachi Ltd | Rear guard for fan |
| JPS57186098A (en) * | 1981-05-13 | 1982-11-16 | Hitachi Ltd | Axial-flow fan |
| JPS63272995A (en) * | 1987-04-30 | 1988-11-10 | Matsushita Seiko Co Ltd | Fan |
-
1987
- 1987-08-25 JP JP62210516A patent/JP2568573B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6453093A (en) | 1989-03-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |