JPH01100399A - Sirocco fan - Google Patents
Sirocco fanInfo
- Publication number
- JPH01100399A JPH01100399A JP25754287A JP25754287A JPH01100399A JP H01100399 A JPH01100399 A JP H01100399A JP 25754287 A JP25754287 A JP 25754287A JP 25754287 A JP25754287 A JP 25754287A JP H01100399 A JPH01100399 A JP H01100399A
- Authority
- JP
- Japan
- Prior art keywords
- impeller
- casing
- outlet
- sirocco fan
- discharge duct
- 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
- 230000002093 peripheral effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、ガス燃焼装置等の給気装置として利用され
るシロッコファンに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sirocco fan used as an air supply device for a gas combustion device or the like.
［従来技術］
従来、この種のシロッコファンとしては、第５図に示し
たガス湯沸器に採用されているもののように、多数の翼
をそれぞれ間隔を付与して円周に沿って配列した羽根車
と、この羽根車を収納して同羽根車の軸芯部に空気の吸
入口を開口し同羽根車の外周、から羽根車の回転方向に
従い羽根車の外周との隙間が徐々に広がるような蝸牛殻
状をなす本体及びこの蝸牛殻状の本体の出口部から略接
線方向に向けて延出した吐出ダクト・を有したケーシン
グとから構成されて、前記羽根車の回転に応じ生じる遠
心力により前記ケージングの吸入口から吸入した空気を
ケーシングの外周面に沿って送り、その出口部から吐出
ダクトを介してガス湯沸器の燃焼室に向けて吹き出すよ
うにしたものがある。[Prior Art] Conventionally, this type of sirocco fan has a large number of blades arranged along the circumference at intervals, such as the one used in the gas water heater shown in Figure 5. The impeller is housed, an air inlet is opened in the shaft core of the impeller, and the gap between the outer periphery of the impeller and the outer periphery of the impeller gradually widens in accordance with the direction of rotation of the impeller. It is composed of a cochlear-shaped main body and a casing having a discharge duct extending substantially tangentially from the outlet of the cochlear-shaped main body, and the centrifugal flow generated in response to the rotation of the impeller. There is a system in which the air sucked in from the inlet of the casing is sent along the outer peripheral surface of the casing by force, and is blown out from the outlet through a discharge duct toward the combustion chamber of the gas water heater.
［発明が解決しようとす・る問題点］
しかしながら、このような構成においては、ケーシング
出口部において羽根車の回転方向端縁は、羽根車の各翼
に対して下行になるように構成されている。また、この
回転方向端縁は、前記羽根車に対し出来るだけ近接させ
たほうが、その送風効率が良いことが実験により確かめ
られている。かかる場合、前記羽根車の回転により、各
翼が前記回転方向端縁を通過すると、その瞬間、空気圧
に大きな変動が発生し、これが羽根車の回転速度及び各
翼の間隔に基づく周波数による空気振動（第６図点線参
照）となり、騒音の原因となっていた。[Problems to be Solved by the Invention] However, in such a configuration, the rotational direction edge of the impeller is configured to be downward relative to each blade of the impeller at the casing outlet portion. There is. Moreover, it has been confirmed through experiments that the air blowing efficiency is better when the edge in the rotation direction is placed as close as possible to the impeller. In such a case, when each blade passes the edge in the rotational direction due to the rotation of the impeller, a large fluctuation occurs in air pressure at that moment, and this causes air vibration due to the frequency based on the rotational speed of the impeller and the spacing between each blade. (See the dotted line in Figure 6), which caused noise.
そこで、本発明は、このようなことに対処すべく、上述
のような原因で発生する騒音を減少するようにしたシロ
ッコファンを提供しようとするものである。Therefore, in order to cope with this problem, the present invention aims to provide a sirocco fan that reduces the noise generated due to the above-mentioned causes.
［問題点を解決す゛るための手段］
このような問題を解決するなめに、本発明は、多数の翼
をそれぞれ間隔を付与して円周に沿って配列した羽根車
と、この羽根車を収納して同羽根車の軸芯部に空気の吸
入口を開口し同羽根車の外周から羽根車の回転方向に従
い羽根車の外周との隙間が徐々に広がるような堝牛殻状
をなす本体及びこの堝牛殻状の本体の出口部から略接線
方向に向けて延出した吐出ダクトを有したケーシングと
からなるシロッコファンにおいて、前記ケーシング本体
出口部の羽根車回転方向端縁に同羽根車の外周に沿い同
羽根車の翼と斜方向に交差して覆う調整部を設けたこと
を特徴とする。[Means for Solving the Problems] In order to solve these problems, the present invention provides an impeller in which a large number of blades are arranged along the circumference at intervals, and an impeller in which the impeller is housed. and an air intake port is opened in the shaft core of the impeller, and the main body is shaped like a cow-shell and has a gap gradually widening from the outer periphery of the impeller to the outer periphery of the impeller in accordance with the direction of rotation of the impeller. In this sirocco fan comprising a casing having a discharge duct extending substantially tangentially from the outlet portion of the casing body, the impeller is attached to the end edge of the impeller rotation direction of the outlet portion of the casing body. The present invention is characterized in that an adjustment portion is provided along the outer periphery and obliquely intersects with and covers the blades of the same impeller.
［作用効果］
以上のように本発明を構成したことにより、前記羽根車
が回転して、翼の一つが前記ケーシング本体出口部の回
転方向端縁に到達しても、この翼が、前記調整部との斜
方向の交差に基づき、その幅方向に順次調整部を通過す
るので、空気圧の変動が徐々に行われることになる。こ
のため、前記周波数による空気圧の変動が緩やかなもの
になり（第６図実線参照〉、騒音の発生が抑制され得る
。[Operation and Effect] By configuring the present invention as described above, even when the impeller rotates and one of the blades reaches the edge in the rotational direction of the casing main body outlet, this blade does not perform the adjustment. Based on the diagonal intersection with the adjustment section, the adjustment section is sequentially passed in the width direction, so that the air pressure is gradually varied. Therefore, fluctuations in air pressure due to the frequency become gentle (see solid line in FIG. 6), and the generation of noise can be suppressed.
［実施例］
以下、本発明の第１の実施例を、図面により説明すると
、第１図は、本発明に係るシロッコファンの断面図であ
り、第２図は第１図に図示した■−■線による断面図（
一部破断）である。このシロッコファンは、羽根車１０
とケーシング２０及びモータ３０とを備えており、羽根
車１０は、平行に並べた一対の円形側板１１．１２の間
にその円周に沿い多数の翼１３〜１３を等間隔に配列し
て構成されている。また、円形側板１１の中心部は、空
気の吸入口として円形に開口しており、−方、円形側板
１２の中心部には後述するモータ３０の出力軸３１が固
着されている。ケーシング２０は、羽根車１０の外周か
ら羽根車１０の回転方向に従い羽根車１０の外周との隙
間が一徐りに広がるような堝生殻状の本体２１を有し、
この蝸牛殼状の本体２１出口部から略接線方向に向けて
吐出ダクト２２を延出している。また、ケーシング２０
は、その内部に内蔵した羽根車１０の側板１１の開口に
対応する位置に空気吸入口２３を開口している。モータ
３０は、ケーシング２０の吸入口２３の対面外側に、そ
の出力軸３１をケーシング２０の内方に延出して固着さ
れており、前記のごとく、その出力軸３１を羽根車１０
の側板１２の中心に固着している。しかして、モータ３
０は羽根車１０を、第１図にて図示逆時計回転方向に回
転させる。[Example] Hereinafter, a first example of the present invention will be explained with reference to the drawings. Fig. 1 is a cross-sectional view of the sirocco fan according to the present invention, and Fig. 2 is a cross-sectional view of the sirocco fan shown in Fig. 1. ■Cross-sectional view by line (
(partially broken). This sirocco fan has 10 impellers.
, a casing 20 and a motor 30, and the impeller 10 is constructed by arranging a large number of blades 13 to 13 at equal intervals along the circumference between a pair of circular side plates 11 and 12 arranged in parallel. has been done. Further, the center of the circular side plate 11 has a circular opening as an air intake port, and an output shaft 31 of a motor 30, which will be described later, is fixed to the center of the circular side plate 12 on the negative side. The casing 20 has a shell-like main body 21 in which the gap between the outer periphery of the impeller 10 and the outer periphery of the impeller 10 gradually widens in accordance with the rotational direction of the impeller 10,
A discharge duct 22 extends substantially tangentially from the outlet of the cochlea-shaped main body 21. In addition, casing 20
has an air intake port 23 opened at a position corresponding to the opening of the side plate 11 of the impeller 10 built therein. The motor 30 is fixed to the outside facing the suction port 23 of the casing 20 with its output shaft 31 extending inward of the casing 20, and as described above, the output shaft 31 is connected to the impeller 10.
It is fixed to the center of the side plate 12 of. However, motor 3
0 rotates the impeller 10 in the counterclockwise rotation direction shown in FIG.
また、このシロッコファンは、断面略し字状の調整板４
０を有しており、この調整板４０は、その風切部４１を
、ケーシング２０の蝸牛殼状の本体２１の出口部の羽根
車回転方向端縁にて羽根車１０の回転周面に沿う状態に
、その取付部４２にて吐出ダクト・２２の内周面にビス
止めされている。In addition, this sirocco fan has an adjustment plate 4 having an oval-shaped cross section.
0, and this adjustment plate 40 has its wind section 41 aligned along the rotating circumferential surface of the impeller 10 at the end of the outlet section of the cochlear shell-shaped main body 21 of the casing 20 in the impeller rotation direction. In this state, the mounting portion 42 is screwed to the inner peripheral surface of the discharge duct 22.
この風切部４１は、第２図にて図示の如く一側から他側
に向けてその幅が広くなるように形成されている。また
、取付部４２のビス穴は、調整板４０の取付位置が上下
方向に調節可能となるような長穴になっている。The wind section 41 is formed so that its width increases from one side to the other side as shown in FIG. 2. Further, the screw holes of the mounting portion 42 are elongated holes so that the mounting position of the adjustment plate 40 can be adjusted in the vertical direction.
以上のように構成した本実施例において、モータ３０に
電圧を印加して、羽根車１０を回転状態にすると、ケー
シング２０の吸入口２３及び側板１１の吸入口から吸入
された空気は、遠心力により羽根車１０の周方向に吹き
出され、ケーシング２０の内周面に沿って逆時計回転方
向に送られ、吐出ダクト２２から吐出される。かかる場
合、羽恨事１０の各翼１３〜１３は、調整板４０の風切
部４１にて、その回転に応じ、第２図にて図示下方から
徐々に覆われることとなり、羽根車１０が調整板４０を
通過するときに発生する空気圧の変動が緩やかなものに
なる（第６図実線参照）。このため、羽根車１０の回転
速度と各翼１３〜１３の間隔に基づく周波数による騒音
を有効に低減することができる。さらに、当該シロッコ
ファンにおいては、調整板４０を上下方向に調整可能と
するようにしたので、ケーシング２０内における羽根車
１０の組み付は精度が高くなくても、調整板４０により
羽根車１０との隙間を最適値に合わせ込むことができる
。In this embodiment configured as described above, when voltage is applied to the motor 30 and the impeller 10 is rotated, the air sucked from the suction port 23 of the casing 20 and the suction port of the side plate 11 is caused by centrifugal force. The air is blown out in the circumferential direction of the impeller 10, sent in a counterclockwise direction along the inner peripheral surface of the casing 20, and discharged from the discharge duct 22. In such a case, each of the blades 13 to 13 of the impeller 10 will be gradually covered by the wind section 41 of the adjustment plate 40 from the lower side as shown in FIG. Fluctuations in the air pressure that occur when the air passes through the plate 40 become gentle (see the solid line in FIG. 6). Therefore, noise due to the frequency based on the rotational speed of the impeller 10 and the spacing between the blades 13 to 13 can be effectively reduced. Furthermore, in the sirocco fan, the adjustment plate 40 is adjustable in the vertical direction, so even if the impeller 10 is not assembled with high accuracy in the casing 20, the adjustment plate 40 allows the impeller 10 to be assembled with the adjustment plate 40. The gap can be adjusted to the optimum value.
次に、本発明の第２の実施例を図面により説明すると、
第３図は、本発明に係るシロッコファンの断面図であり
、第４図は第３図に図示した■−八へ線による断面図（
一部破断）である。このシロッコファンのケーシング２
０．Ａは、その出口部の羽根車回転方向端縁、即ち、吐
出ダクト２２Ａの取り付は部下縁４１Ａを、第４図に示
すように、羽根車１０の回転方向に向けて７字形に形成
することを特徴としている。その他の構成については、
第１の実施例と同一である。Next, a second embodiment of the present invention will be explained with reference to the drawings.
FIG. 3 is a cross-sectional view of the sirocco fan according to the present invention, and FIG. 4 is a cross-sectional view taken along line ■--8 shown in FIG.
(partially broken). Casing 2 of this sirocco fan
0. A indicates the end edge of the outlet portion in the rotational direction of the impeller, that is, the lower edge 41A of the outlet duct 22A is formed into a figure 7 shape facing the rotational direction of the impeller 10, as shown in FIG. It is characterized by For other configurations,
This is the same as the first embodiment.
このように第２の実施例を構成したことにより、前記の
場合と同様に、モータ３０に電圧を付与して、羽根車１
０を回転状態にすると、ケーシング２ＯＡの開口部及び
側板１１の開口部から吸入された空気は、遠心力により
、吐出ダクト２２Ａから吐出される。かかる場合、羽根
車１０の翼１３は、吐出ダクト２２ＡのＶ字形部分にて
、その回転に応じ、翼１３の両端部から徐々に覆われる
こととなり、羽根車１０とケーシング２ＯＡの回転方向
端縁の間に発生する空気圧の変動が緩やかなものになる
。このため、羽根車１０の回転速度と各翼１３〜１３の
間隔に基づく周波数による騒音を有効に低減することが
できる。By configuring the second embodiment in this way, voltage is applied to the motor 30 and the impeller 1 is
0 is in a rotating state, air sucked in through the opening of the casing 2OA and the opening of the side plate 11 is discharged from the discharge duct 22A due to centrifugal force. In such a case, the blades 13 of the impeller 10 are gradually covered from both ends of the blades 13 by the V-shaped portion of the discharge duct 22A as the blades 13 rotate, and the edges of the impeller 10 and the casing 2OA in the rotational direction are gradually covered. The fluctuations in air pressure that occur during this period become more gradual. Therefore, noise due to the frequency based on the rotational speed of the impeller 10 and the spacing between the blades 13 to 13 can be effectively reduced.
第１図は本発明の第１の実施例であるシロッコファンの
全体図、第２図は第１図における■−■断面図、第３図
は本発明の第２の実施例であるシロッコファンの全体図
、第４図は第３図における■−■断面図、第５図は従来
のシロッコファンを備えたガス湯沸器の断面図、第６図
はシロ・ンコファンの出口部に生ずる空気圧変動の振幅
のグラフで従来技術と本発明とを対比したものである。
符号の説明
１０・・・羽根車、１３〜１３・・・翼、２０゜２ＯＡ
・・・ケーシング、２１，２１Ａ・・・本体、２２，２
２Ａ・・・吐出ダクト、３０・・・モータ、４０・・・
調整板、４１．４１Ａ・・・調整部（風切部）、４２・
・・取付部。Fig. 1 is an overall view of a sirocco fan which is a first embodiment of the present invention, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is a sirocco fan which is a second embodiment of the present invention. Figure 4 is a cross-sectional view taken from ■-■ in Figure 3, Figure 5 is a cross-sectional view of a gas water heater equipped with a conventional sirocco fan, and Figure 6 is the air pressure generated at the outlet of the sirocco fan. A graph of the amplitude of fluctuations compares the prior art and the present invention. Explanation of symbols 10... Impeller, 13-13... Wings, 20°2OA
...Casing, 21,21A...Body, 22,2
2A...Discharge duct, 30...Motor, 40...
Adjustment plate, 41.41A...adjustment section (wind section), 42.
...Mounting part.
Claims (1)
した羽根車と、この羽根車を収納して同羽根車の軸芯部
に空気の吸入口を開口し同羽根車の外周から羽根車の回
転方向に従い羽根車の外周との隙間が徐々に広がるよう
な蝸牛殼状をなす本体及びこの蝸牛殻状の本体の出口部
から略接線方向に向けて延出した吐出ダクトを有したケ
ーシングとからなるシロッコファンにおいて、前記ケー
シング本体出口部の羽根車回転方向端縁に同羽根車の外
周に沿い同羽根車の翼と斜方向に交差して覆う調整部を
設けたことを特徴とするシロッコファン。An impeller has a large number of blades arranged along the circumference with intervals between each impeller, and the impeller is housed and an air inlet is opened in the shaft core of the impeller, and the impeller is drawn from the outer periphery of the impeller. A casing having a cochlea-shaped main body whose gap with the outer periphery of the impeller gradually widens in accordance with the rotational direction of the car, and a discharge duct extending approximately tangentially from the outlet of the cochlear-shaped main body. The scirocco fan is characterized in that an adjustment part is provided at the edge of the casing main body outlet in the impeller rotation direction along the outer periphery of the impeller, intersecting obliquely with the blades of the impeller. Sirocco fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25754287A JPH01100399A (en) | 1987-10-13 | 1987-10-13 | Sirocco fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25754287A JPH01100399A (en) | 1987-10-13 | 1987-10-13 | Sirocco fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01100399A true JPH01100399A (en) | 1989-04-18 |
Family
ID=17307729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25754287A Pending JPH01100399A (en) | 1987-10-13 | 1987-10-13 | Sirocco fan |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01100399A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6254336B1 (en) * | 1998-01-20 | 2001-07-03 | Lg Electronics, Inc. | Sirocco fan having an inclined cutoff |
| US6821088B2 (en) * | 2001-03-16 | 2004-11-23 | Denso Corporation | Centrifugal blower having noise-reduction structure |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS549006A (en) * | 1977-06-23 | 1979-01-23 | Matsushita Electric Ind Co Ltd | Blower |
-
1987
- 1987-10-13 JP JP25754287A patent/JPH01100399A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS549006A (en) * | 1977-06-23 | 1979-01-23 | Matsushita Electric Ind Co Ltd | Blower |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6254336B1 (en) * | 1998-01-20 | 2001-07-03 | Lg Electronics, Inc. | Sirocco fan having an inclined cutoff |
| US6821088B2 (en) * | 2001-03-16 | 2004-11-23 | Denso Corporation | Centrifugal blower having noise-reduction structure |
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