JPH06330894A - Centrifugal blower - Google Patents
Centrifugal blowerInfo
- Publication number
- JPH06330894A JPH06330894A JP11820293A JP11820293A JPH06330894A JP H06330894 A JPH06330894 A JP H06330894A JP 11820293 A JP11820293 A JP 11820293A JP 11820293 A JP11820293 A JP 11820293A JP H06330894 A JPH06330894 A JP H06330894A
- Authority
- JP
- Japan
- Prior art keywords
- side plate
- impeller
- flow
- outlet end
- suction ring
- 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
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、空気調和機などに用い
られる低騒音化を図った遠心送風機に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centrifugal blower which is used in an air conditioner or the like and has reduced noise.
【０００２】[0002]
【従来の技術】従来より、遠心送風機は空気調和機など
の送風機として幅広く使用されており、近年は特に低騒
音化に対する要請が非常に強くなっている。2. Description of the Related Art Conventionally, centrifugal blowers have been widely used as blowers for air conditioners and the like, and in recent years, there has been a particularly strong demand for noise reduction.
【０００３】以下、図面を参照しながら、実開昭５９−
８１８００号公報などで提案されている従来の遠心送風
機について説明する。Below, with reference to the drawings,
A conventional centrifugal blower proposed in Japanese Patent No. 81800 will be described.
【０００４】図５は従来の遠心送風機の構造を示すもの
である。図５において１は羽根車であり、複数の羽根板
２と、前記羽根板２を固定した主板３と、前記羽根板２
の反主板側端面に固定し吸込部端部４ａを略円筒形に形
成した側板４より構成されている。５は羽根車１に直結
したモ−タであり、羽根車１とモ−タ５を収納するケー
シング６に固定されている。７は入口端部７ａから出口
端部７ｂにかけて湾曲しかつ出口端部７ｂの内径を吸込
部最小径より大とした吸込リングでありケーシング６に
固定されている。また、吸込リング７の出口端部７ｂは
羽根車１の側板４の略円筒形に形成された吸込部端部４
ａの近傍に挿入されている。FIG. 5 shows the structure of a conventional centrifugal blower. In FIG. 5, reference numeral 1 denotes an impeller, a plurality of vanes 2, a main plate 3 to which the vanes 2 are fixed, and the vanes 2
Of the side plate 4 which is fixed to the end surface of the opposite side of the main plate, and the suction end 4a is formed in a substantially cylindrical shape. A motor 5 is directly connected to the impeller 1, and is fixed to a casing 6 that houses the impeller 1 and the motor 5. Reference numeral 7 denotes a suction ring that is curved from the inlet end 7a to the outlet end 7b and has an inner diameter of the outlet end 7b larger than the minimum diameter of the suction portion, and is fixed to the casing 6. Further, the outlet end 7 b of the suction ring 7 is formed in a substantially cylindrical shape of the side plate 4 of the impeller 1 and the suction end 4 is formed.
It is inserted near a.
【０００５】以上のように構成された遠心送風機につい
て、以下その動作について説明する。The operation of the centrifugal blower configured as described above will be described below.
【０００６】まず、モ−タ５の駆動力によって羽根車１
が回転すると、吸込リング７を介して空気が羽根車１内
に導入され、複数の羽根板２間を通過する際に静圧と動
圧を付加され羽根車１からケーシング６内に吐出され
る。その後、ケーシング６内で動圧の一部は静圧に変換
されてケーシング６外に吐出され送風作用を為す。ここ
で吸込リング７に沿って羽根車１内に流入する気流は、
その出口端部７ｂから羽根車１内に流入する際に、側板
４の吸込部端部４ａに一端付着して流入するため側板４
の壁面に沿って流れ、羽根車１内の流速分布の主板３の
方向への片寄りを防ぎ、送風効率を向上させる。First, the impeller 1 is driven by the driving force of the motor 5.
When is rotated, air is introduced into the impeller 1 through the suction ring 7, static pressure and dynamic pressure are added when passing between the plurality of blade plates 2, and the air is discharged from the impeller 1 into the casing 6. . After that, a part of the dynamic pressure in the casing 6 is converted into static pressure and is discharged to the outside of the casing 6 to perform an air blowing action. Here, the airflow flowing into the impeller 1 along the suction ring 7 is
When flowing into the impeller 1 from the outlet end portion 7b, one end adheres to the suction portion end portion 4a of the side plate 4 and flows in.
To prevent the flow velocity distribution in the impeller 1 from deviating in the direction of the main plate 3 and improve the blowing efficiency.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら上記のよ
うな構成では、吸込リング７の内面に沿って流入する気
流Ｅは出口端部７ｂから一旦は側板４の先端部４ａ内面
に付着するが、遠心送風機にかかる静圧が大きい場合に
は羽根車１内の圧力とケ−シング６内の圧力差が大きい
ためケ−シング６内から羽根車１内に還流する気流Ｆが
無視できないほど増加し、この還流する気流Ｆは側板４
の先端部４ａで急激な流動方向変化により剥離するた
め、吸込リング７の外面に沿って出口端部７ｂから流出
する気流は乱れた流れとなる。従って、側板４の壁面近
傍の流れは、壁面表面の流れが乱れているため下流に向
かう段階で剥離する。従って、羽根車１の吐出側では側
板４近傍の流れが全体に乱れ、送風性能が劣化し騒音が
増加するという問題があった。However, in the above structure, the air flow E flowing along the inner surface of the suction ring 7 temporarily adheres to the inner surface of the tip portion 4a of the side plate 4 from the outlet end portion 7b, but it is centrifugal. When the static pressure applied to the blower is large, the pressure difference in the impeller 1 and the pressure in the casing 6 are large, so that the air flow F flowing back from the casing 6 into the impeller 1 increases to a non-negligible level. This recirculating airflow F is applied to the side plate 4
Since it separates at the tip 4a due to a sudden change in the flow direction, the airflow flowing from the outlet end 7b along the outer surface of the suction ring 7 becomes a turbulent flow. Therefore, the flow in the vicinity of the wall surface of the side plate 4 is separated at the stage toward the downstream because the flow on the wall surface is disturbed. Therefore, on the discharge side of the impeller 1, there is a problem that the flow in the vicinity of the side plate 4 is totally disturbed, the blowing performance is deteriorated, and noise is increased.
【０００８】本発明は上記課題に鑑み、遠心送風機にか
かる静圧が高く、ケ−シング内から羽根車内に還流する
気流が増大する場合でも、吸込リングの外面に沿って出
口端部から流出する還流の剥離と乱れを防止し、側板壁
面近傍の流れの乱れと後流での剥離による送風性能の劣
化と騒音の増加を防止することのできる遠心送風機を提
供するものである。In view of the above-mentioned problems, the present invention has a high static pressure applied to the centrifugal blower, and even if the air flow returning from the casing to the impeller increases, it flows out from the outlet end along the outer surface of the suction ring. (EN) Provided is a centrifugal blower capable of preventing separation and turbulence of reflux, and preventing deterioration of blast performance and increase of noise due to turbulence of flow near a side wall surface and separation in the wake.
【０００９】[0009]
【課題を解決するための手段】上記課題を解決するため
に本発明の遠心送風機は、主板と複数の羽根板と入口部
内面をラッパ状に形成した側板から成る羽根車と、前記
羽根車を収納するケ−シングと、入り口端部から出口端
部にかけて湾曲しかつ出口端部の内径を吸込み部最小径
より大とした吸込みリングとで構成し、前記吸い込みリ
ングの出口端部を前記羽根車の側板の最小内径位置の近
傍に設定した構成を備えるものである。In order to solve the above-mentioned problems, a centrifugal fan according to the present invention includes an impeller including a main plate, a plurality of vanes, and a side plate having a trumpet-shaped inner surface of an inlet portion, and the impeller. The casing includes a casing and a suction ring that is curved from the inlet end to the outlet end and has an inner diameter of the outlet end larger than the minimum diameter of the suction portion. The outlet end of the suction ring is the impeller. The side plate has a configuration set near the minimum inner diameter position.
【００１０】また他の遠心送風機は、前記側板の内面全
面に多数の小径の略半球状ディンプルを設けた構成を備
えるものである。Another centrifugal blower has a structure in which a large number of small-diameter, substantially hemispherical dimples are provided on the entire inner surface of the side plate.
【００１１】[0011]
【作用】本発明では、側板の先端部がラッパ状に形成し
てあるためケ−シング内から羽根車内に還流する流れは
吸込リングの外面に沿って流れ、吸込リング先端から側
板壁面に付着する。また、ケ−シング外から羽根車内に
流入する気流は吸込みリングの内面に沿って流れ、かつ
吸込リング先端の内径が拡大してあるため側板内面に沿
って流れる。従って、吸込リング先端から流入する流れ
は外面の流れと外面の流れが共に側板内面に沿って付着
して流れる。従って、下流域の側板近傍の流れの乱れを
低減し、送風性能の劣化と騒音の増大を防止する。In the present invention, since the tip of the side plate is formed in a trumpet shape, the flow returning from the inside of the casing to the inside of the impeller flows along the outer surface of the suction ring and adheres to the wall surface of the side plate from the tip of the suction ring. . Further, the airflow flowing from the outside of the casing into the impeller flows along the inner surface of the suction ring, and also flows along the inner surface of the side plate because the inner diameter of the tip of the suction ring is enlarged. Therefore, the flow flowing in from the tip of the suction ring is such that the flow on the outer surface and the flow on the outer surface both adhere and flow along the inner surface of the side plate. Therefore, the turbulence of the flow near the side plate in the downstream region is reduced, and the deterioration of the blowing performance and the increase of noise are prevented.
【００１２】また、側板の内面全面に設けた多数の小径
の略半球状ディンプルの内部が負圧になり側板表面の気
流を吸引するため、側板近傍の流れは側板の湾曲した形
状に追従して流れ、また乱流境界層の発達を抑制するの
で境界層の剥離による気流の乱れ増加を防止し、かつ側
板表面の気流の流動損失を低減する。従って、羽根車内
部の主流の領域を広げ送風機内部の流れの乱れを防止
し、送風性能の向上と騒音の低減を実現することができ
る。Further, since a large number of small-diameter hemispherical dimples provided on the entire inner surface of the side plate become negative pressure to suck the air flow on the side plate surface, the flow near the side plate follows the curved shape of the side plate. Since the flow and the development of the turbulent boundary layer are suppressed, the increase of the turbulence of the airflow due to the separation of the boundary layer is prevented and the flow loss of the airflow on the side plate surface is reduced. Therefore, it is possible to expand the mainstream region inside the impeller, prevent turbulence of the flow inside the blower, and improve the blowing performance and reduce noise.
【００１３】[0013]
【実施例】以下、本発明による第１の実施例について、
図面を参照しながら説明する。尚、従来例と同一部分に
ついては重複を避けるため、同一の符号を付けて説明を
省略する。EXAMPLE A first example according to the present invention will be described below.
A description will be given with reference to the drawings. In order to avoid duplication, the same parts as those of the conventional example are denoted by the same reference numerals and the description thereof will be omitted.
【００１４】図１は、本発明の一実施例における遠心送
風機の構造を示すものである。図において８は羽根車で
あり、複数の羽根板９と、羽根板９を固定した主板１０
と、入口部１１ａの内面をラッパ状に形成した側板１１
から成る。また、吸込みリング７の出口端部７ｂは羽根
車８の側板１１の最小内径位置の近傍に設定してある。FIG. 1 shows the structure of a centrifugal blower according to an embodiment of the present invention. In the figure, reference numeral 8 denotes an impeller, and a plurality of vanes 9 and a main plate 10 to which the vanes 9 are fixed.
And a side plate 11 in which the inner surface of the inlet portion 11a is formed in a trumpet shape.
Consists of. The outlet end 7b of the suction ring 7 is set near the minimum inner diameter position of the side plate 11 of the impeller 8.
【００１５】以上のように構成された遠心送風機につい
て、以下その動作について説明する。The operation of the centrifugal blower configured as above will be described below.
【００１６】まず、モ−タ５の駆動力によって羽根車８
が回転すると、吸込リング７を介して空気が羽根車８内
に導入され、羽根板９間を通過する際に静圧と動圧を付
加され羽根車８からケーシング６内に吐出される。その
後、ケーシング６内で動圧の一部は静圧に変換されてケ
ーシング６外に吐出され送風作用を為す。First, the impeller 8 is driven by the driving force of the motor 5.
When is rotated, air is introduced into the impeller 8 through the suction ring 7, static pressure and dynamic pressure are added when passing between the blade plates 9, and the air is discharged from the impeller 8 into the casing 6. After that, a part of the dynamic pressure in the casing 6 is converted into static pressure and is discharged to the outside of the casing 6 to perform an air blowing action.
【００１７】図２は側板近傍の流れを示す模式図であ
り、側板１１の先端部１１ａがラッパ状に形成してある
ためケ−シング６内から羽根車１内に還流する流れＧは
吸込リング７の外面に沿って付着して流れ、吸込リング
先端７ｂから側板１１の壁面に付着する。また、ケ−シ
ング６外から羽根車１内に流入する気流Ｈは吸込みリン
グ７の内面に沿って付着して流れ、かつ吸込リング先端
７ｂの内径は拡大してあるため側板１１に沿って流れ
る。すなわち、吸込リング先端７ｂから羽根車８内部に
流入する流れは内面の流れＨと外面の流れＧが共に側板
１１の内面に沿って付着して流れ、側板１１表面からの
気流の剥離点を後流に移動させるる。従って、羽根車８
の側板１１近傍の流れの乱れが低減し、送風性能の劣化
と騒音の増加が防止される。FIG. 2 is a schematic view showing the flow in the vicinity of the side plate. Since the tip portion 11a of the side plate 11 is formed in a trumpet shape, the flow G flowing back from the casing 6 into the impeller 1 is a suction ring. It adheres and flows along the outer surface of 7, and adheres to the wall surface of the side plate 11 from the suction ring tip 7b. Further, the airflow H flowing from the outside of the casing 6 into the impeller 1 adheres and flows along the inner surface of the suction ring 7, and flows along the side plate 11 because the inner diameter of the suction ring tip 7b is enlarged. . That is, in the flow that flows from the suction ring tip 7b into the impeller 8, both the flow H on the inner surface and the flow G on the outer surface adhere and flow along the inner surface of the side plate 11, leaving behind the separation point of the air flow from the surface of the side plate 11. Move to the flow. Therefore, the impeller 8
The turbulence of the flow in the vicinity of the side plate 11 is reduced, and the deterioration of the blowing performance and the increase of noise are prevented.
【００１８】以上のように本実施例の遠心式送風機は、
複数の羽根板９と、羽根板９を固定した主板１０と、入
口部１１ａの内面をラッパ状に形成した側板１１から羽
根車を構成し、吸込みリング７の出口端部７ｂを羽根車
８の側板１１の最小内径位置の近傍に設定してあるた
め、吸込リング出口端部７ｂから羽根車８内部に流入す
る流れは、内面に沿って流れる気流Ｈと外面に沿って流
れる気流Ｇが共に側板１１の内面に沿って付着して流れ
るため、羽根車８の側板１１近傍の流れの乱れが低減
し、送風性能の劣化と騒音の増加を防止することができ
る。As described above, the centrifugal blower of this embodiment is
A plurality of blade plates 9, a main plate 10 to which the blade plate 9 is fixed, and a side plate 11 in which the inner surface of the inlet portion 11a is formed into a trumpet shape constitute an impeller, and the outlet end portion 7b of the suction ring 7 is connected to the impeller 8 of the impeller wheel 8. Since it is set in the vicinity of the minimum inner diameter position of the side plate 11, the flow that flows into the impeller 8 from the suction ring outlet end portion 7b is the side plate having both the air flow H flowing along the inner surface and the air flow G flowing along the outer surface. Since it adheres and flows along the inner surface of 11, the turbulence of the flow in the vicinity of the side plate 11 of the impeller 8 is reduced, and the deterioration of the blowing performance and the increase of noise can be prevented.
【００１９】次に、本発明による遠心式送風機の第２の
実施例について図面を参照しながら説明する。Next, a second embodiment of the centrifugal blower according to the present invention will be described with reference to the drawings.
【００２０】図３は、本発明の第２の実施例による遠心
送風機の断面を示すものである。第１の実施例と異なる
のは、羽根車８の側板１１の内面全面に多数の小径の略
半球状のディンプル１２を設けた構成を備えた点にあ
る。FIG. 3 shows a cross section of a centrifugal fan according to a second embodiment of the present invention. The difference from the first embodiment is that a large number of small-diameter, substantially hemispherical dimples 12 are provided on the entire inner surface of the side plate 11 of the impeller 8.
【００２１】以上のように構成された遠心送風機につい
て以下、その動作を説明する。図４は側板近傍の流れを
示す要部断面の模式図である。吸込リング先端７ｂから
羽根車８内部に流入する気流は内面の流れＪと外面の流
れＩが共に側板１１の内面に沿って付着して流れる。側
板１１に付着した流れは、側板１１の内面全面に設けた
多数の小径の略半球状ディンプル１２の内部に発生する
負圧の作用で吸引されるため、側板１１の湾曲した形状
に追従して流れ、側板１１の表面に形成される乱流境界
層の発達が抑制され乱流境界層の剥離が抑制される。ま
た、乱流境界層の剥離の抑制により気流の乱れが抑制さ
れ、かつ側板１１表面の気流の流動損失が低下する。従
って、羽根車８内部の主流の領域が広がり、送風機内部
の流れの乱れが低減され、送風性能が向上し乱流騒音が
低減する。The operation of the centrifugal blower configured as described above will be described below. FIG. 4 is a schematic view of a cross section of a main part showing a flow near the side plate. The airflow flowing from the suction ring tip 7b into the impeller 8 is such that the flow J on the inner surface and the flow I on the outer surface both adhere and flow along the inner surface of the side plate 11. The flow adhering to the side plate 11 is sucked by the action of the negative pressure generated inside the large number of small-diameter substantially hemispherical dimples 12 provided on the entire inner surface of the side plate 11, and therefore follows the curved shape of the side plate 11. The flow suppresses the development of the turbulent boundary layer formed on the surface of the side plate 11 and suppresses the separation of the turbulent boundary layer. Further, the turbulence of the air flow is suppressed by suppressing the separation of the turbulent boundary layer, and the flow loss of the air flow on the surface of the side plate 11 is reduced. Therefore, the region of the main flow inside the impeller 8 is expanded, the turbulence of the flow inside the blower is reduced, the blowing performance is improved, and the turbulent noise is reduced.
【００２２】以上のように、本実施例の遠心送風機は複
数の羽根板９と、羽根板９を固定した主板１０と、入口
部１１ａの内面をラッパ状に形成した側板１１から羽根
車を構成し、吸込みリング７の出口端部７ｂを羽根車８
の側板１１の最小内径位置の近傍に設定し、羽根車８の
側板１１の内面全面に多数の小径の略半球状ディンプル
１２を設けた構成となっているので、側板１１に付着し
た流れは、側板１１の内面全面に設けた多数の小径の略
半球状ディンプル１２の内部に発生する負圧の作用で吸
引されるため、側板１１の表面に形成される乱流境界層
の発達が抑制され乱流境界層の剥離が抑制され、羽根車
８内の気流の乱れが低減され、かつ側板１１表面の気流
の流動損失が低下する。従って、羽根車８内部の主流の
領域を広げ、送風機内部の流れの乱れを低減し、送風性
能の向上と乱流騒音を低減することができる。As described above, the centrifugal blower of the present embodiment is composed of a plurality of blade plates 9, a main plate 10 to which the blade plates 9 are fixed, and a side plate 11 in which the inner surface of the inlet portion 11a is formed into a trumpet shape. The outlet end 7b of the suction ring 7 to the impeller 8
Since it is set near the minimum inner diameter position of the side plate 11 and a large number of small-diameter hemispherical dimples 12 are provided on the entire inner surface of the side plate 11 of the impeller 8, the flow adhering to the side plate 11 is Since the negative pressure generated inside a large number of small-diameter hemispherical dimples 12 provided on the entire inner surface of the side plate 11 is sucked, the turbulent boundary layer formed on the surface of the side plate 11 is suppressed from developing. The separation of the flow boundary layer is suppressed, the turbulence of the air flow in the impeller 8 is reduced, and the flow loss of the air flow on the surface of the side plate 11 is reduced. Therefore, it is possible to widen the region of the main flow inside the impeller 8, reduce the turbulence of the flow inside the blower, improve the blowing performance and reduce the turbulent noise.
【００２３】また、側板１１近傍の流れは略半球状ディ
ンプル１２の作用で壁面方向へ吸引されるので、側板１
１の湾曲の曲率を大きくしても側板１１から流れが剥離
することはない。したがって、羽根車８の全体の高さを
大きくすることなく、側板１１の湾曲の曲率を挙げて吐
出部幅を広げ、送風能力を増すことができる。Since the flow near the side plate 11 is sucked toward the wall surface by the action of the substantially hemispherical dimple 12, the side plate 1
Even if the curvature of the curve 1 is increased, the flow is not separated from the side plate 11. Therefore, without increasing the overall height of the impeller 8, it is possible to increase the discharge portion width by increasing the curved curvature of the side plate 11 and increase the blowing capacity.
【００２４】[0024]
【発明の効果】以上説明したように本発明は、主板と複
数の羽根板と入口部内面をラッパ状に形成した側板から
成る羽根車と、前記羽根車を収納するケ−シングと、入
り口端部から出口端部にかけて湾曲しかつ出口端部の内
径を吸込み部最小径より大とした吸込みリングとから成
り、前記吸い込みリングの出口端部を前記羽根車の側板
の最小内径位置の近傍に設定した構成の遠心式送風機で
あるから、羽根車の側板近傍の流れの乱れが低減し、送
風性能の劣化と乱流騒音の増加を防止することができ
る。As described above, according to the present invention, an impeller including a main plate, a plurality of vanes, and a side plate having a trumpet-shaped inner surface of the entrance, a casing for housing the impeller, and an entrance end. Portion of the suction ring, which is curved from the portion to the outlet end and has an inner diameter of the outlet end larger than the minimum diameter of the suction portion, and the outlet end of the suction ring is set near the minimum inner diameter position of the side plate of the impeller. Since the centrifugal blower has the above configuration, the turbulence of the flow near the side plate of the impeller can be reduced, and the deterioration of the blowing performance and the increase of turbulent noise can be prevented.
【００２５】さらに、羽根車の側板の内面全面に多数の
小径の略半球状ディンプルを備えることにより、羽根車
内部の主流の領域を広げ、送風機内部の流れの乱れを低
減し、送風性能を向上し、かつ乱流騒音を低減すること
ができる。Further, by providing a large number of small-diameter, substantially hemispherical dimples on the entire inner surface of the side plate of the impeller, the mainstream region inside the impeller is expanded, the turbulence of the flow inside the blower is reduced, and the blowing performance is improved. In addition, turbulent noise can be reduced.
【図１】本発明の第１の実施例の遠心送風機の断面図FIG. 1 is a sectional view of a centrifugal fan according to a first embodiment of the present invention.
【図２】同実施例の遠心送風機の側板近傍の流れを示す
模式図FIG. 2 is a schematic diagram showing a flow in the vicinity of a side plate of the centrifugal blower of the embodiment.
【図３】本発明の第２の実施例の遠心送風機の断面図FIG. 3 is a sectional view of a centrifugal fan according to a second embodiment of the present invention.
【図４】同実施例の遠心送風機の側板近傍の流れを示す
模式図FIG. 4 is a schematic diagram showing a flow in the vicinity of a side plate of the centrifugal blower of the embodiment.
【図５】従来の遠心送風機の断面図FIG. 5 is a sectional view of a conventional centrifugal blower.
【図６】従来の遠心送風機の側板近傍の流れを示す模式
図FIG. 6 is a schematic diagram showing a flow in the vicinity of a side plate of a conventional centrifugal blower.
７ 吸込リング ７ａ 吸込リングの出口部 ８ 羽根車 ９ 羽根板 １０ 主板 １１ 側板 １１ａ 側板の入口部 １１ｂ 側板の出口部 １２ ディンプル 7 Suction ring 7a Suction ring outlet 8 Impeller 9 Blade 10 Main plate 11 Side plate 11a Side plate inlet 11b Side plate outlet 12 Dimple
Claims (2)
パ状に形成した側板から成る羽根車と、前記羽根車を収
納するケ−シングと、入口端部から出口端部にかけて湾
曲しかつ出口端部の内径を吸込部最小径より大とした吸
込リングとで構成し、前記吸込リングの出口端部を前記
羽根車の側板の最小内径位置の近傍に設定した遠心送風
機。1. An impeller comprising a main plate, a plurality of vanes, and a side plate having a trumpet-shaped inner surface on the inlet side, a casing for accommodating the impeller, and a curve from the inlet end to the outlet end. A centrifugal blower, comprising a suction ring having an inner diameter of an outlet end portion larger than a minimum diameter of a suction portion, and an outlet end portion of the suction ring being set near a minimum inner diameter position of a side plate of the impeller.
ディンプルを設けた請求項１記載の遠心送風機。2. The centrifugal blower according to claim 1, wherein a large number of small-diameter hemispherical dimples are provided on the entire inner surface of the side plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11820293A JPH06330894A (en) | 1993-05-20 | 1993-05-20 | Centrifugal blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11820293A JPH06330894A (en) | 1993-05-20 | 1993-05-20 | Centrifugal blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06330894A true JPH06330894A (en) | 1994-11-29 |
Family
ID=14730720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11820293A Pending JPH06330894A (en) | 1993-05-20 | 1993-05-20 | Centrifugal blower |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06330894A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100400472B1 (en) * | 2001-07-26 | 2003-10-01 | 엘지전자 주식회사 | a turbo-fan |
| JP2008138536A (en) * | 2006-11-30 | 2008-06-19 | Matsushita Electric Ind Co Ltd | Centrifugal blower |
| JP2019082129A (en) * | 2017-10-30 | 2019-05-30 | 株式会社デンソー | Blower |
| JP2021080851A (en) * | 2019-11-15 | 2021-05-27 | 株式会社マキタ | Blower |
| DE112020002080T5 (en) | 2019-04-25 | 2022-01-27 | Denso Corporation | Centrifugal fan and blower equipped with the centrifugal fan |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6035199A (en) * | 1983-08-04 | 1985-02-22 | Matsushita Electric Ind Co Ltd | Impeller of blower |
-
1993
- 1993-05-20 JP JP11820293A patent/JPH06330894A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6035199A (en) * | 1983-08-04 | 1985-02-22 | Matsushita Electric Ind Co Ltd | Impeller of blower |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100400472B1 (en) * | 2001-07-26 | 2003-10-01 | 엘지전자 주식회사 | a turbo-fan |
| JP2008138536A (en) * | 2006-11-30 | 2008-06-19 | Matsushita Electric Ind Co Ltd | Centrifugal blower |
| JP2019082129A (en) * | 2017-10-30 | 2019-05-30 | 株式会社デンソー | Blower |
| DE112020002080T5 (en) | 2019-04-25 | 2022-01-27 | Denso Corporation | Centrifugal fan and blower equipped with the centrifugal fan |
| US11761456B2 (en) | 2019-04-25 | 2023-09-19 | Denso Corporation | Centrifugal fan and blower equipped with the centrifugal fan |
| JP2021080851A (en) * | 2019-11-15 | 2021-05-27 | 株式会社マキタ | Blower |
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