JPH03233196A - Multiblade fan - Google Patents
Multiblade fanInfo
- Publication number
- JPH03233196A JPH03233196A JP2781790A JP2781790A JPH03233196A JP H03233196 A JPH03233196 A JP H03233196A JP 2781790 A JP2781790 A JP 2781790A JP 2781790 A JP2781790 A JP 2781790A JP H03233196 A JPH03233196 A JP H03233196A
- Authority
- JP
- Japan
- Prior art keywords
- blade
- outer diameter
- time
- generated
- outside edge
- 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.)
- Pending
Links
- 238000000926 separation method Methods 0.000 claims abstract description 6
- 238000009434 installation Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 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）
本発明はレンジフード等に用いられる多翼送風機（シロ
ッコファン）の改良に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to improvements in multi-blade blowers (sirocco fans) used in range hoods and the like.
（従来の技術）
レンジフードの送風機ユニットに使用されている多翼送
風機は、羽根の外側縁が一直線をなし、羽根の幅は上端
から下端まで同じ寸法を有している。(Prior Art) In a multi-blade blower used in a blower unit of a range hood, the outer edges of the blades are in a straight line, and the width of the blades is the same from the upper end to the lower end.
（発明が解決しようとする課題）
上記した構造の多翼送風機を回転させた場合、羽根の外
側縁における空気の剥離現象は該羽根の全長区間で一度
に生じ、それによって騒音値が高くなるといった問題を
有する。(Problem to be Solved by the Invention) When a multi-blade blower having the above-described structure is rotated, the air separation phenomenon at the outer edge of the blade occurs at once over the entire length of the blade, which increases the noise level. have a problem
本発明は上述した従来の技術の有する問題点に鑑みてな
されたもので、その目的とする処は、風量の低下をきた
すことなく騒音値のみを低下させることが出来る多翼送
風機を提供することにある。The present invention has been made in view of the problems of the prior art described above, and its purpose is to provide a multi-blade blower that can reduce only the noise level without reducing the air volume. It is in.
（課題を解決するための手段）
上記目的を達成するために、本発明における多翼送風機
は、上下板間に取付ける羽根の外側縁に外径寸法の大小
を付与したことを特徴とする。(Means for Solving the Problems) In order to achieve the above object, the multi-blade blower according to the present invention is characterized in that the outer edges of the blades attached between the upper and lower plates are given a size of outer diameter.
羽根の外側縁に付与する外径寸法の大小の形態としては
、山形形状を複数又は１個形成したり、上端から下端又
はその逆方向に向けて直線的に傾斜させたり、前述の山
形形状を曲線で形成する等が挙げられる。The size of the outer diameter dimension given to the outer edge of the blade may be formed by forming a plurality or one chevron shape, by sloping it linearly from the upper end to the lower end or vice versa, or by forming the above-mentioned chevron shape. For example, it may be formed with a curved line.
又、上下板間に取付ける多数の羽根は同一形状のものを
取付けてもよい。羽根における山形の凸部の位置が羽根
の長さ方向に少しづつズクして形成されたものを取付け
て山形の凸部が螺旋状になるようにしたり、更に羽根に
形成した山形の凸部と凹部が周方向に互い違いに位置さ
せるなど任意である。Further, the large number of blades installed between the upper and lower plates may have the same shape. The position of the chevron-shaped protrusions on the blade may be slightly staggered in the length direction of the blade, so that the chevron-shaped protrusion becomes a spiral, or the chevron-shaped protrusion formed on the blade may be The recesses may be arranged alternately in the circumferential direction.
（作用）
上記手段によれば、上下板間に取付けられる羽根の外側
縁が外径寸法の大小によって凹凸になっているため、回
転時に羽根の外側縁に生じる空気の剥離は羽根の全長区
間で時間的なズレを有して生じる。(Function) According to the above means, since the outer edge of the blade attached between the upper and lower plates is uneven depending on the size of the outer diameter, the separation of air that occurs on the outer edge of the blade during rotation occurs over the entire length of the blade. Occurs with a time lag.
（発明の効果）
本発明の多翼送風機は以上詳述−したように、羽根の外
側縁に外径寸法の大小を付与して凹凸を付けたため、回
転時に羽根の外側縁に生じる空気の剥離現象は、羽根の
全長区間が一度に生ぜずに、時間的なズレをもって発生
する。従って、騒音値を従来品に比較して低下させるこ
とができる。(Effects of the Invention) As detailed above, in the multi-blade blower of the present invention, since the outer edges of the blades are given irregularities by varying the outer diameter, air separation occurs on the outer edges of the blades during rotation. The phenomenon does not occur over the entire length of the blade at once, but occurs with a time lag. Therefore, the noise level can be lowered compared to conventional products.
又、従来の羽根の面積と同じ面積に凹凸を付与した場合
は、当然のことながら風量の低下をきたすことなく騒音
値のみを低下させることができるものである。Furthermore, if the unevenness is provided in the same area as the conventional blade, it is possible to reduce only the noise value without reducing the air volume.
（実施例）
以下、本発明の実施例を図面に基づいて説明すると、図
中１はリング形状の上板、２は上板１と同径で且つ中央
部にモータの回転軸に取付けるためのボス部４を固着し
た下板、３は弯曲した羽根であり、該羽根３は上板１と
下板とにカシメによって固着されている。(Embodiment) Hereinafter, embodiments of the present invention will be described based on the drawings. In the figure, 1 is a ring-shaped upper plate, and 2 is a ring-shaped upper plate, which has the same diameter as the upper plate 1 and has a central part for attaching to the rotating shaft of the motor. The lower plate 3 to which the boss portion 4 is fixed is a curved blade, and the blade 3 is fixed to the upper plate 1 and the lower plate by caulking.
上記羽根３は略矩形状に形成され、その外側縁は外径寸
法の大小を付与して凹凸に形成されている。The blade 3 is formed into a substantially rectangular shape, and its outer edge is formed into an uneven shape with a different outer diameter.
その外側縁の凹凸形状は、第１図に示すように直線によ
って山形の凸部３ａを羽根の長さ（高さ）範囲内に複数
個設けたものに限定されず、第３図の如く羽根の上端か
ら下端に向って直線的に傾斜させたもの、第４図の如く
羽根の長さ方向中央部から上下端部に向って幅狭くなる
ように傾斜させたもの（山形の凸部が１個）、或いは第
５図の如く曲線によって複数個の山形状凸部３ａを形成
したもの等が挙げられる。The uneven shape of the outer edge is not limited to a straight line with a plurality of chevron-shaped protrusions 3a provided within the length (height) range of the blade as shown in FIG. The blade is sloped linearly from the upper end to the lower end, and the blade is sloped so that the width becomes narrower from the central part in the longitudinal direction toward the upper and lower ends as shown in Fig. 4. ), or one in which a plurality of mountain-shaped protrusions 3a are formed by a curved line as shown in FIG.
又、上下板間に取付けられる多数枚の羽根は上述した羽
根のうちから１種を選択し、全て同じものを取付は形態
に限られるものではなく、羽根３に形成された凸部の位
置を該羽根の長さ方向に少しづつズラして形成し、それ
らを上下板間に順次配置して凸部の位置が全体として螺
旋状を描くようにしたり、羽根における凸部と凹部を互
い違いに形成した２種類の羽根を周方向に交互に配置す
るなど適宜組合せることも良いものである。In addition, for the large number of blades to be installed between the upper and lower plates, one type of blade is selected from among the blades mentioned above, and the installation is not limited to the form, but the position of the convex portion formed on the blade 3. The blades are formed by being slightly shifted in the length direction of the blade, and they are arranged sequentially between the upper and lower plates so that the position of the convex portions forms a spiral as a whole, or the convex portions and concave portions of the blade are alternately formed. It is also good to combine the two types of blades as appropriate, such as alternately arranging them in the circumferential direction.
次に、本発明に係る多翼送風機と従来品との実験結果に
ついて説明する。Next, experimental results of the multi-blade blower according to the present invention and a conventional product will be explained.
〈本発明品〉
外径 １８０ｍｍ
羽根の外側縁形状；第１図のもの
〈従来品〉
外径、羽根長さ及び枚数は本発明品と同じで、羽根の外
側縁は直線（同一幅）
〈測定条件〉
同一風量（５３０ｍ３／ｈ）時の騒音値（ｄＢ）、及び
回転数を測定
〈測定結果〉
騒音値（ｄＢ） 回転数（ｒｐｍ）本発明品
４５ ７７８従来品 ４６ ８
０６<Product of the present invention> Outer diameter: 180 mm Shape of the outer edge of the blade; as shown in Figure 1 <Conventional product> The outer diameter, length and number of blades are the same as the product of the present invention, and the outer edge of the blade is straight (same width). Measurement conditions> Measure the noise value (dB) and rotation speed at the same air volume (530 m3/h) <Measurement results> Noise value (dB) Rotation speed (rpm) Invention product
45 778 Conventional product 46 8
06
図面は本発明の実施例を示し、第１図は縦断正面図、第
２図は一部切欠平面図、第３図乃至第５図は羽根形状の
他の例を示す正面図である。
図中、１：上板
２：下板
３：羽根The drawings show an embodiment of the present invention; FIG. 1 is a longitudinal sectional front view, FIG. 2 is a partially cutaway plan view, and FIGS. 3 to 5 are front views showing other examples of the blade shape. In the diagram, 1: Upper plate 2: Lower plate 3: Blade
Claims (1)
送風機において、該羽根の外側縁に外径寸法の大小を付
与して空気の剥離が一度に生じないようにしたことを特
徴とする多翼送風機。In a multi-blade blower in which a large number of forward-facing blades are provided between an upper plate and a lower plate, the outside edges of the blades are given a size of outer diameter to prevent air separation from occurring all at once. Features a multi-blade blower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2781790A JPH03233196A (en) | 1990-02-06 | 1990-02-06 | Multiblade fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2781790A JPH03233196A (en) | 1990-02-06 | 1990-02-06 | Multiblade fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03233196A true JPH03233196A (en) | 1991-10-17 |
Family
ID=12231516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2781790A Pending JPH03233196A (en) | 1990-02-06 | 1990-02-06 | Multiblade fan |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03233196A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5611667A (en) * | 1994-08-09 | 1997-03-18 | Kabushiki Kaisha Toshiba | Transverse fan |
| US5964576A (en) * | 1996-07-26 | 1999-10-12 | Japan Servo Co., Ltd. | Impeller of centrifugal fan |
| JP2005233169A (en) * | 2004-02-17 | 2005-09-02 | Atago Seisakusho:Kk | Impeller of multi-blade fan |
| US6942459B2 (en) * | 2003-08-29 | 2005-09-13 | Datech Technology Co., Ltd. | Modified centrifugal fan wheel |
| JP2015135118A (en) * | 2015-03-16 | 2015-07-27 | 東芝ホームテクノ株式会社 | blower |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63289295A (en) * | 1987-05-21 | 1988-11-25 | Matsushita Electric Ind Co Ltd | Blower |
-
1990
- 1990-02-06 JP JP2781790A patent/JPH03233196A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63289295A (en) * | 1987-05-21 | 1988-11-25 | Matsushita Electric Ind Co Ltd | Blower |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5611667A (en) * | 1994-08-09 | 1997-03-18 | Kabushiki Kaisha Toshiba | Transverse fan |
| US5964576A (en) * | 1996-07-26 | 1999-10-12 | Japan Servo Co., Ltd. | Impeller of centrifugal fan |
| US6942459B2 (en) * | 2003-08-29 | 2005-09-13 | Datech Technology Co., Ltd. | Modified centrifugal fan wheel |
| JP2005233169A (en) * | 2004-02-17 | 2005-09-02 | Atago Seisakusho:Kk | Impeller of multi-blade fan |
| JP2015135118A (en) * | 2015-03-16 | 2015-07-27 | 東芝ホームテクノ株式会社 | blower |
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