JP2770677B2 - Cross flow fan - Google Patents
Cross flow fanInfo
- Publication number
- JP2770677B2 JP2770677B2 JP4275818A JP27581892A JP2770677B2 JP 2770677 B2 JP2770677 B2 JP 2770677B2 JP 4275818 A JP4275818 A JP 4275818A JP 27581892 A JP27581892 A JP 27581892A JP 2770677 B2 JP2770677 B2 JP 2770677B2
- Authority
- JP
- Japan
- Prior art keywords
- sound
- flow fan
- cross flow
- pressure level
- impeller
- 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
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、空気調和機等に用いら
れる横流ファンに関し、特に、騒音レベルを低減できる
横流ファンに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross flow fan used for an air conditioner or the like, and more particularly to a cross flow fan capable of reducing a noise level.
【０００２】[0002]
【従来の技術】従来、この種の横流ファンとしては、図
３に示すように、羽根車３０の円弧翼３１,３１…を等
しいピッチ角β,β…で配列し、かつ、図４に示すよう
に、羽根車３０を回転軸方向に複数個千鳥配列して、回
転軸方向の１つ置きの羽根車３０の円弧翼３１の周方向
の位相が同一になるようにしたものがある。2. Description of the Related Art Conventionally, as a cross flow fan of this type, as shown in FIG. 3, arc blades 31, 31,... Of an impeller 30 are arranged at equal pitch angles β, β, and shown in FIG. As described above, a plurality of impellers 30 are arranged in a staggered manner in the rotation axis direction so that the circumferential phases of the arc-shaped blades 31 of every other impeller 30 in the rotation axis direction are the same.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記従
来の横流ファンでは、１秒当たりのファン回転数Ｎと円
弧翼の枚数Ｚとの積ＮＺの周波数の音であるＮＺ音や、
上記積ＮＺの２倍の２ＮＺの周波数の音である２ＮＺ音
とが、他の周波数の音に比べて顕著に大きくなり、聴感
上耳ざわりな騒音を発生するという問題がある。この現
象の一例を、図７の音周波数スペクトラムに示す。さら
に、上記現象が、総合音としてのＡスケール音を大きく
する要因になるという問題がある。However, in the above-mentioned conventional cross flow fan, an NZ sound which is a sound having a frequency of a product NZ of a fan rotation speed N per second and the number Z of arc blades,
There is a problem that the 2NZ sound, which is a sound having a frequency of 2NZ twice as large as the product NZ, is significantly louder than sounds of other frequencies, and generates noise that is unpleasant in audibility. An example of this phenomenon is shown in the sound frequency spectrum of FIG. Further, there is a problem that the above phenomenon becomes a factor for increasing the A-scale sound as the overall sound.
【０００４】そこで、本発明の目的は、騒音レベルを低
減できる横流ファンを提供することにある。Accordingly, an object of the present invention is to provide a cross flow fan that can reduce the noise level.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するた
め、この発明の横流ファンは、複数の前向きに湾曲した
円弧翼を有する羽根車を備える横流ファンにおいて、上
記羽根車の円弧翼をランダムなピッチ角で周方向に配列
し、かつ、上記羽根車を回転軸方向に複数個配列し、か
つ、上記複数の羽根車を周方向に１°乃至４°ずつ位置
ずれさせたことを特徴としている。In order to achieve the above object, a cross flow fan according to the present invention is a cross flow fan including an impeller having a plurality of forwardly curved arc blades. A plurality of the impellers are arranged in a circumferential direction at a pitch angle, a plurality of the impellers are arranged in a rotation axis direction, and the plurality of impellers are displaced by 1 ° to 4 ° in a circumferential direction. .
【０００６】[0006]
【作用】上記構成によれば、風量を横軸にとりＮＺ音お
よび２ＮＺ音の音圧レベルを縦軸にとった図５(Ａ)に示
すように、同一の送風量であれば、△印を破線でつない
だ特性(あ)が示す従来例の２ＮＺ音の音圧レベルに比べ
て、〇印を破線でつないだ特性(い)が示す本発明の横流
ファンの２ＮＺ音の音圧レベルが大幅に減少した。According to the above arrangement, as shown in FIG. 5A in which the air volume is plotted on the horizontal axis and the sound pressure levels of the NZ sound and the 2NZ sound are plotted on the vertical axis, if the air volume is the same, a triangle is indicated. Compared with the sound pressure level of the conventional 2NZ sound indicated by the characteristic (a) connected by the broken line, the sound pressure level of the 2NZ sound of the cross flow fan of the present invention indicated by the characteristic (i) indicated by the broken line is significantly larger than that of the conventional example. Decreased to.
【０００７】また、同じく図５(Ａ)に示すように、△印
を実線でつないだ特性(う)が示す従来例のＮＺ音の音圧
レベルに比べて、〇印を実線でつないだ特性(え)が示す
本発明の横流ファンのＮＺ音の音圧レベルが減少した。Also, as shown in FIG. 5A, the characteristic in which a triangle is connected by a solid line is different from the sound pressure level of a conventional NZ sound indicated by a characteristic in which a triangle is connected by a solid line. (E) shows that the sound pressure level of the NZ sound of the cross flow fan of the present invention is reduced.
【０００８】また、図５(Ｂ)に示すように、△印と実線
が表す特性(お)が示す従来例の送風音の音圧レベルに比
べて、〇印と実線が表す特性(か)が示す本発明の横流フ
ァンの送風音の音圧レベルが減少した。Further, as shown in FIG. 5B, the characteristic (?) Indicated by the solid triangle and the solid line is smaller than the sound pressure level of the blown sound of the conventional example indicated by the characteristic (O) indicated by the solid triangle and the solid line. The sound pressure level of the blowing noise of the cross flow fan according to the present invention, which is indicated by, is reduced.
【０００９】また、羽根車の円弧翼間のピッチ角をラン
ダムに配列した場合でも、複数の羽根車を周方向に１°
乃至４°ずつ位置ずれさせずに、周方向に３４°ずつ位
置ずれさせたスキュー角３４°の横流ファンでは、図８
(Ｂ)の音周波数スペクトラムに示すようにピーク音が発
生する。また、複数の羽根車を周方向に３６°ずつ位置
ずれさせたスキュー角３６°の横流ファンでは、図８
(Ｃ)に示すように、多くのピーク音が発生した。さら
に、図には示さないが、スキュー角５°の横流ファンに
おいても２ＮＺ音のピーク音が発生した。Further, even when the pitch angles between the arc-shaped blades of the impeller are randomly arranged, a plurality of impellers can be rotated by 1 ° in the circumferential direction.
In a cross flow fan having a skew angle of 34 °, which is displaced by 34 ° in the circumferential direction without being displaced by 4 ° to 4 °, FIG.
A peak sound is generated as shown in the sound frequency spectrum of FIG. In a cross flow fan with a skew angle of 36 ° in which a plurality of impellers are displaced in the circumferential direction by 36 °, FIG.
As shown in (C), many peak sounds were generated. Further, although not shown in the figure, a peak sound of 2NZ sound was also generated in the cross flow fan having a skew angle of 5 °.
【００１０】これに対し、複数の羽根車を周方向に２°
ずつ位置ずれさせた本発明のスキュー角２°の横流ファ
ンによれば、図８(Ａ)に示すように、図８(Ｂ)や図８
(Ｃ)に示したピーク音を解消することができた。On the other hand, a plurality of impellers are set at 2 ° in the circumferential direction.
According to the cross flow fan having a skew angle of 2 ° according to the present invention, the position of which is shifted by one at a time, as shown in FIG.
The peak sound shown in (C) could be eliminated.
【００１１】[0011]
【実施例】以下、本発明を図示の実施例により詳細に説
明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments.
【００１２】図１に示すように、この実施例の横流ファ
ンは、複数の前向きに湾曲した円弧翼１,１…を有する
羽根車２を備え、上記羽根車２の円弧翼１を、ランダム
なピッチ角α１,α２,α３…で周方向に配列している。As shown in FIG. 1, the cross flow fan of this embodiment includes an impeller 2 having a plurality of forwardly curved arc blades 1, 1... Are arranged in the circumferential direction at pitch angles α1, α2, α3.
【００１３】また、図２に示すように、上記羽根車２を
回転軸方向に複数個配列し、かつ、上記複数の羽根車
２,２…を周方向に１°乃至４°ずつ位置ずれさせてい
る。As shown in FIG. 2, a plurality of the impellers 2 are arranged in the direction of the rotation axis, and the plurality of impellers 2, 2,... Are displaced by 1 ° to 4 ° in the circumferential direction. ing.
【００１４】上記実施例と従来例との比較騒音テストの
結果を図５に示す。FIG. 5 shows the results of a comparative noise test between the above embodiment and the conventional example.
【００１５】まず、風量を横軸にとりＮＺ音および２Ｎ
Ｚ音の音圧レベルを縦軸にとった図５(Ａ)に示すよう
に、同一の送風量であれば、△印を破線でつないだ特性
(あ)が示す従来例の２ＮＺ音の音圧レベルに比べて、〇
印を破線でつないだ特性(い)が示す本発明の横流ファン
の２ＮＺ音の音圧レベルが大幅に減少した(最大８dＢ減
少)。First, the NZ sound and the 2N
As shown in FIG. 5 (A) in which the sound pressure level of the Z sound is plotted on the vertical axis, when the air volume is the same, the characteristic is indicated by connecting the dashes with broken lines.
Compared with the sound pressure level of the conventional 2NZ sound shown by (a), the sound pressure level of the 2NZ sound of the cross flow fan of the present invention shown by the characteristic (i) in which the mark is connected by a broken line is greatly reduced (maximum). 8 dB).
【００１６】また、同じく図５(Ａ)に示すように、△印
を実線でつないだ特性(う)が示す従来例のＮＺ音の音圧
レベルに比べて、〇印を実線でつないだ特性(え)が示す
本発明の横流ファンのＮＺ音の音圧レベルが減少した。Also, as shown in FIG. 5A, compared with the sound pressure level of the NZ sound of the conventional example indicated by the characteristic (△) connected by a solid line, the characteristic connected by a solid line (E) shows that the sound pressure level of the NZ sound of the cross flow fan of the present invention is reduced.
【００１７】また、図５(Ｂ)に示すように、△印と実線
が表す特性(お)が示す従来例の送風音の音圧レベルに比
べて、〇印と実線が表す特性(か)が示す本発明の横流フ
ァンの送風音の音圧レベルが約２dＢ減少した。As shown in FIG. 5 (B), the characteristic (?) Indicated by the solid triangle and the solid line is smaller than the sound pressure level of the conventional blown sound indicated by the characteristic (△) indicated by the solid line and the solid line. Indicates that the sound pressure level of the blowing noise of the cross flow fan of the present invention is reduced by about 2 dB.
【００１８】また、図６に示す上記実施例の音圧レベル
の周波数特性を、図７に示す従来例の周波数特性と比較
すればわかるように、周波数２ＮＺにおける音圧レベル
の突出を略完全に解消することができた。Further, as can be seen by comparing the frequency characteristics of the sound pressure level of the above embodiment shown in FIG. 6 with the frequency characteristics of the conventional example shown in FIG. 7, the protrusion of the sound pressure level at the frequency 2NZ is almost completely eliminated. I was able to eliminate it.
【００１９】このように、上記実施例によれば、送風特
性を劣化させることなく、ピーク音を低減できるので、
大幅な低騒音化を実現できる。As described above, according to the above embodiment, the peak sound can be reduced without deteriorating the air blowing characteristics.
Significant noise reduction can be realized.
【００２０】[0020]
【発明の効果】以上より明らかなように、本発明の横流
ファンは、羽根車の円弧翼をランダムなピッチ角で周方
向に配列し、かつ、上記羽根車を回転軸方向に複数個配
列し、かつ、上記複数の羽根車を周方向に１°乃至４°
ずつ位置ずれさせたので、上記ピッチ角が等しい従来例
や、上記羽根車を周方向に４°を越えて位置ずれさせた
ものに比べて、ピーク音を低減でき、大幅な低騒音化を
実現できる。As is apparent from the above description, the cross flow fan of the present invention has circular arc blades of an impeller arranged at random pitch angles in the circumferential direction, and a plurality of the impellers arranged in the rotation axis direction. And the plurality of impellers are arranged at a circumferential angle of 1 ° to 4 °.
The peak noise can be reduced compared to the conventional example where the pitch angle is equal, and the impeller is shifted more than 4 ° in the circumferential direction, resulting in significant noise reduction. it can.
【図１】 本発明の横流ファンの実施例の円弧翼の配列
を示す図である。FIG. 1 is a view showing an arrangement of arc blades of an embodiment of a cross flow fan of the present invention.
【図２】 上記実施例の構造を簡単に示す斜視図であ
る。FIG. 2 is a perspective view schematically showing the structure of the embodiment.
【図３】 従来例の横流ファンの円弧翼の配列を示す図
である。FIG. 3 is a view showing an arrangement of arc-shaped blades of a conventional cross flow fan.
【図４】 上記従来例の構造を簡単に示す斜視図であ
る。FIG. 4 is a perspective view schematically showing the structure of the conventional example.
【図５】 上記実施例と従来例の騒音特性を示す図であ
る。FIG. 5 is a diagram showing noise characteristics of the embodiment and the conventional example.
【図６】 上記実施例の音圧レベルの周波数スペクトル
を示す図である。FIG. 6 is a diagram showing a frequency spectrum of a sound pressure level in the embodiment.
【図７】 上記従来例の音圧レベルの周波数スペクトル
を示す図である。FIG. 7 is a diagram showing a frequency spectrum of a sound pressure level in the conventional example.
【図８】 羽根車のスキュー角を２°,３４°,３６°に
した場合の音圧レベルの周波数スペクトルを示す図であ
る。FIG. 8 is a diagram illustrating a frequency spectrum of a sound pressure level when the skew angles of the impeller are set to 2 °, 34 °, and 36 °.
【符号の説明】 １…円弧翼、２…羽根車。[Description of Signs] 1 ... arc blade, 2 ... impeller.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) F04D 17/04 F04D 29/30 101 F04D 29/66──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) F04D 17/04 F04D 29/30 101 F04D 29/66
Claims (1)
羽根車を備える横流ファンにおいて、 上記羽根車の円弧翼をランダムなピッチ角で周方向に配
列し、かつ、上記羽根車を回転軸方向に複数個配列し、
かつ、上記複数の羽根車を周方向に１°乃至４°ずつ位
置ずれさせたことを特徴とする横流ファン。1. A cross flow fan comprising an impeller having a plurality of forwardly curved arc blades, wherein the arc blades of the impeller are arranged in a circumferential direction at a random pitch angle, and the impeller is rotated in a rotation axis direction. Are arranged in multiple,
A cross flow fan wherein the plurality of impellers are displaced by 1 ° to 4 ° in the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4275818A JP2770677B2 (en) | 1992-10-14 | 1992-10-14 | Cross flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4275818A JP2770677B2 (en) | 1992-10-14 | 1992-10-14 | Cross flow fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06129387A JPH06129387A (en) | 1994-05-10 |
| JP2770677B2 true JP2770677B2 (en) | 1998-07-02 |
Family
ID=17560855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4275818A Expired - Lifetime JP2770677B2 (en) | 1992-10-14 | 1992-10-14 | Cross flow fan |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2770677B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3450764A1 (en) | 2017-08-03 | 2019-03-06 | Mitsubishi Heavy Industries Thermal Systems, Ltd. | Tangential fan and air conditioner |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3107711B2 (en) * | 1994-08-09 | 2000-11-13 | 株式会社東芝 | Cross flow fan |
| KR20000032976A (en) * | 1998-11-18 | 2000-06-15 | 윤종용 | Cross flow fan for air conditioner |
| JP4109936B2 (en) * | 2002-09-13 | 2008-07-02 | 日立アプライアンス株式会社 | Air conditioner |
| JP2007255426A (en) * | 2007-05-14 | 2007-10-04 | Hitachi Appliances Inc | Air conditioner |
| JP5030115B2 (en) * | 2010-02-16 | 2012-09-19 | シャープ株式会社 | Cross-flow fan, blower and impeller molding machine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5968198U (en) * | 1982-10-29 | 1984-05-09 | 株式会社東芝 | crossflow fan |
| JPS59167990U (en) * | 1983-04-26 | 1984-11-10 | 株式会社東芝 | Juan |
| JPS6017296A (en) * | 1983-07-08 | 1985-01-29 | Matsushita Electric Ind Co Ltd | Vane wheel of crossing current blower |
-
1992
- 1992-10-14 JP JP4275818A patent/JP2770677B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3450764A1 (en) | 2017-08-03 | 2019-03-06 | Mitsubishi Heavy Industries Thermal Systems, Ltd. | Tangential fan and air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06129387A (en) | 1994-05-10 |
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