JP2001073995A - Impeller for blower - Google Patents
Impeller for blowerInfo
- Publication number
- JP2001073995A JP2001073995A JP25013599A JP25013599A JP2001073995A JP 2001073995 A JP2001073995 A JP 2001073995A JP 25013599 A JP25013599 A JP 25013599A JP 25013599 A JP25013599 A JP 25013599A JP 2001073995 A JP2001073995 A JP 2001073995A
- Authority
- JP
- Japan
- Prior art keywords
- blade
- blower
- impeller
- blades
- serration
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
- F04D29/384—Blades characterised by form
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/20—Rotors
- F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
- F05D2240/304—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the trailing edge of a rotor blade
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本願発明は、送風機用の羽根
車の構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an impeller for a blower.
【０００２】[0002]
【従来の技術】一般に軸流ファン又は斜流ファン等の送
風機用の羽根車は、モータの駆動軸に固定されるハブの
外周面に複数枚の羽根を所定の角度で一体化して構成さ
れているが、最近では該送風機用の羽根車の騒音低減対
策に対する要求が厳しくなっている。2. Description of the Related Art Generally, an impeller for a blower such as an axial flow fan or a mixed flow fan is constructed by integrating a plurality of blades at a predetermined angle on an outer peripheral surface of a hub fixed to a drive shaft of a motor. However, recently, there has been an increasing demand for noise reduction measures for the impeller for the blower.
【０００３】送風機の羽根車からの発生騒音は、一般に
広帯域騒音と離散周波数騒音とに分けられるが、例えば
空調機用などの低圧送風機では前者の方が支配的であ
る。この広帯域騒音は、上流乱れ、羽根面上の圧力変動
及び羽根の後縁から放出される渦などにより発生する。
従って、この広帯域騒音を低減するには、できるだけ羽
根の翼弦長を長くして翼負荷の低減・分散を図るのがよ
く、また前傾化して後縁における境界層の集積を少なく
するのがよい。これらの方法は、古くから採用されてい
る。[0003] Noise generated from an impeller of a blower is generally divided into broadband noise and discrete frequency noise. For example, in a low-pressure blower for an air conditioner or the like, the former is dominant. This broadband noise is generated by upstream turbulence, pressure fluctuation on the blade surface, and vortex emitted from the trailing edge of the blade.
Therefore, in order to reduce this broadband noise, it is preferable to reduce and disperse the blade load by increasing the chord length of the blade as much as possible, and to reduce the accumulation of the boundary layer at the trailing edge by leading the blade forward. Good. These methods have been adopted for a long time.
【０００４】ところが、最近のように低騒音化に対する
要求レベルが高くなってくると、そのような方法による
対応だけでは不十分であり、より一層の低騒音化を図る
ための対策が必要となってきている。However, when the required level of noise reduction has recently become high, it is not sufficient to respond only by such a method, and it is necessary to take measures for further noise reduction. Is coming.
【０００５】そこで、これに対する１つの対策として、
広帯域騒音発生の主原因である前述の（ａ）上流乱れ、
（ｂ）後流渦、（ｃ）羽根面上の圧力変動のうち、
（ａ）の上流乱れが小さい場合には、（ｂ）の後流渦が
騒音に大きく寄与することに着目し、例えば図７および
図８に示すように、羽根３の後縁部３ｂに凹部１０ａ，
１０ａ・・・と凸部１０ｂ，１０ｂ・・・よりなるノコ
ギリ歯状のセレーション部１０を設け、羽根３の負圧面
３ｄ側の気流と圧力面３ｃ側の気流との後縁部３ｂ側で
の合流が徐々に起こって、両者の流れの合流（混合）が
スムーズに行われるようにしたものが提案されている
（特開平８−１８９４９７号公報参照）。このような構
成によると、上記合流によって後縁部３ｂ側で発生する
後流渦が分割されて細かくなり、かつ後流の速度欠損が
小さくなって、それらにより発生していた騒音が低下す
るとともに、ファン効率が向上する。Therefore, as one countermeasure against this,
(A) upstream turbulence, which is the main cause of broadband noise generation,
(B) wake vortex, (c) pressure fluctuation on the blade surface,
When the upstream turbulence in (a) is small, attention is paid to the fact that the wake vortex (b) greatly contributes to noise. For example, as shown in FIGS. 10a,
Are provided at the trailing edge 3b side of the airflow on the negative pressure surface 3d side and the airflow on the pressure surface 3c side of the blade 3. There has been proposed a device in which the merging gradually occurs so that the merging (mixing) of the two flows is performed smoothly (see Japanese Patent Application Laid-Open No. 8-189497). According to such a configuration, the wake vortex generated on the side of the trailing edge 3b due to the merging is divided and finely divided, and the velocity loss of the wake is reduced, so that the noise generated thereby is reduced. , Fan efficiency is improved.
【０００６】[0006]
【発明が解決しようとする課題】しかし、上記セレーシ
ョン構造の場合、薄翼構造の羽根の場合に限らず、図示
のような厚翼構造の羽根の場合にも、必要な羽根後縁部
３ｂの強度（剛性）を維持するために、同部分を所定レ
ベルの厚さに形成する必要があり、セレーション部１０
を設けない場合に比べて必然的に肉厚が厚くなる。However, in the case of the above-mentioned serrated structure, not only the case of the blade having the thin blade structure, but also the case of the blade having the thick blade structure as shown in FIG. In order to maintain strength (rigidity), it is necessary to form the same portion at a predetermined level of thickness.
Inevitably, the wall thickness is increased as compared with the case where no is provided.
【０００７】そのため、例えば図９に示すように、上記
羽根両面側の空気の流れがセレーション部１０の凹溝部
１０ａ，１０ａ・・・を十分に通過しなくなるので、後
流渦の分割細分化ができにくくなり、上述したセレーシ
ョン部による消音作用が低減される問題がある。For this reason, as shown in FIG. 9, for example, the air flow on both sides of the blades does not sufficiently pass through the concave grooves 10a, 10a,. There is a problem in that it is difficult to perform the operation, and the silencing effect of the serration portion described above is reduced.
【０００８】本願各発明は、この問題を解決するために
なされたもので、上記セレーション部の凸部を羽根正圧
面側に所定の角度だけ傾斜させて設けることにより、特
に正圧面側の流れが凹部を通りやすくなるようにするこ
とによって後流渦の細分化を容易にして、セレーション
部の消音作用を有効に向上させた送風機用羽根車を提供
することを目的とするものである。The inventions of the present application have been made in order to solve this problem. By providing the projections of the serrations at a predetermined angle on the blade pressure side, the flow on the pressure side is particularly reduced. An object of the present invention is to provide an impeller for a blower in which a wake vortex is easily divided by making it easy to pass through a concave portion, and a silencing effect of a serration portion is effectively improved.
【０００９】[0009]
【課題を解決するための手段】本願各発明は、上記の目
的を達成するために、それぞれ次のような課題解決手段
を備えて構成されている。Means for Solving the Problems In order to achieve the above objects, the present invention has the following means for solving the problems.
【００１０】（１） 請求項１の発明 この発明の送風機用羽根車は、モータの駆動軸に固定さ
れるハブ２の外周面に複数枚の羽根３，３・・・を所定
の角度で一体化してなる送風機用羽根車において、上記
羽根３，３・・・の後縁部３ｂ，３ｂ・・・にセレーシ
ョン部４を設けるとともに、該セレーション部４の凸部
４ｂ，４ｂ・・・を正圧面３ｃ，３ｃ・・・側に傾斜さ
せたことを特徴としている。(1) In the impeller for a blower according to the present invention, a plurality of blades 3, 3... Are integrally formed at a predetermined angle on an outer peripheral surface of a hub 2 fixed to a drive shaft of a motor. In the blower impeller, the serrations 4 are provided at the trailing edges 3b, 3b,... Of the blades 3, 3,. It is characterized by being inclined to the pressing surfaces 3c, 3c.
【００１１】このように、羽根３，３・・・の後縁部３
ｂ，３ｂ・・・に設けたセレーション部４の凸部４ｂ，
４ｂ・・・を羽根３，３・・・の正圧面３ｃ，３ｃ・・
・側に所定の角度だけ傾斜させて設けると、羽根正圧面
３ｃ，３ｃ・・・側の流れがセレーション部４の凸部４
ｂ，４ｂ・・・間の凹部４ａ，４ａ・・・を有効に通過
して後流渦を分割細分化するようになり、セレーション
部４の消音作用を有効に向上させることが可能となる。As described above, the trailing edge 3 of the blades 3, 3,...
The projections 4b of the serrations 4 provided at b, 3b,.
4b are connected to the pressure surfaces 3c of the blades 3, 3.
.., The flow on the blade pressure surfaces 3 c, 3 c.
b, 4b... between the recesses 4a, 4a..., and the wake vortex is divided and subdivided, so that the silencing effect of the serration portion 4 can be effectively improved.
【００１２】（２） 請求項２の発明 この発明の送風機用羽根車は、上記請求項１の発明の構
成における羽根３，３・・・が、薄翼構造の羽根よりな
ることを特徴としている。(2) Invention of Claim 2 The impeller for a blower according to the present invention is characterized in that the blades 3, 3,... In the configuration of the invention of claim 1 are blades having a thin blade structure. .
【００１３】該構成のような薄翼構造の羽根の場合、厚
翼構造の羽根の場合に比べて、全体としての騒音低減機
能が低いので、上記請求項１の発明のセレーション部４
による消音作用が特に有効となる。The serrated portion 4 according to the first aspect of the present invention has a lower noise reduction function as a whole in the case of a blade having a thin blade structure as described above than in the case of a blade having a thick blade structure.
In particular, the silencing effect due to is effective.
【００１４】（３） 請求項３の発明 この発明の送風機用羽根車は、上記請求項１の発明の構
成における羽根３，３・・・が、厚翼構造の羽根よりな
ることを特徴としている。(3) Invention of Claim 3 The impeller for a blower according to the present invention is characterized in that the blades 3, 3... In the configuration of the invention of claim 1 are composed of thick blades. .
【００１５】この発明の構成のように、厚翼構造の羽根
に上記請求項１の発明のセレーション構造が採用される
と、該羽根の前縁部３ａで負圧面側へのコアンダ効果が
生じ、羽根両面上の流れの変動（圧力変動）をなくして
騒音を低減できることに加え、さらに、後縁部３ｂのセ
レーション部４により後縁部３ｂからの放出渦を有効に
低減して騒音を低減することができるので、一層消音効
果が向上する。When the serration structure according to the first aspect of the present invention is applied to the blade having the thick wing structure as in the configuration of the present invention, a Coanda effect on the negative pressure surface side is generated at the leading edge 3a of the blade. In addition to reducing the noise by eliminating the flow fluctuation (pressure fluctuation) on both surfaces of the blade, the serrations 4 of the trailing edge 3b effectively reduce the vortex emitted from the trailing edge 3b to reduce the noise. Therefore, the noise reduction effect is further improved.
【００１６】（４） 請求項４の発明 この発明の送風機用羽根車は、上記請求項３の発明の構
成における厚翼構造の羽根３，３・・・が、中実体より
なることを特徴としている。(4) A fourth aspect of the present invention is an impeller for a blower according to the third aspect of the present invention, wherein the blades 3, 3... I have.
【００１７】このように上記請求項３の発明の厚翼構造
の羽根３，３・・・が、中実体によれ形成されている
と、さらに羽根３，３，・・・の強度（剛性）が高くな
る。As described above, when the blades 3, 3... Having the thick wing structure according to the third aspect of the present invention are formed by solid bodies, the strength (rigidity) of the blades 3, 3,. Will be higher.
【００１８】（５） 請求項５の発明 この発明の送風機用羽根車は、上記請求項３の発明の構
成における厚翼構造の羽根３，３・・・が、中空体より
なることを特徴としている。(5) Invention of Claim 5 The impeller for a blower according to the present invention is characterized in that the blades 3, 3,... I have.
【００１９】このように上記請求項３の発明の厚翼構造
の羽根３，３・・・が、中空体によれ形成されている
と、さらに羽根３，３・・・の材料コストを節減できる
とともに、羽根３，３・・・自体の軽量化が可能とな
る。If the blades 3, 3,... Having the thick wing structure according to the third aspect of the present invention are formed by hollow bodies, the material cost of the blades 3, 3,. At the same time, the weight of the blades 3, 3,... Itself can be reduced.
【００２０】（６） 請求項６の発明 この発明の送風機用羽根車は、上記請求項１，２，３，
４又は５の発明の構成における送風機が、軸流送風機よ
りなることを特徴としている。(6) The invention according to claim 6 The impeller for a blower according to the present invention is the above-described claim 1, 2, 3, 3.
The blower according to the fourth or fifth aspect of the invention is characterized in that the blower is an axial blower.
【００２１】したがって、この発明の構成では、送風機
として、例えばプロペラファン等の軸流送風機を採用し
た場合に、上記請求項１，２，３，４又は５の発明と同
様の作用を有効に得ることができる。Therefore, according to the structure of the present invention, when an axial blower such as a propeller fan is employed as the blower, the same operation as the above-mentioned inventions of claims 1, 2, 3, 4 and 5 can be effectively obtained. be able to.
【００２２】（７） 請求項７の発明 この発明の送風機用羽根車は、上記請求項１，２，３，
４又は５の発明の構成における送風機が、斜流型の送風
機よりなることを特徴としている。(7) The invention of claim 7 The impeller for a blower according to the present invention provides the above-described claims 1, 2, 3, and 3.
The blower according to the fourth or fifth aspect of the invention is characterized in that the blower is a mixed flow blower.
【００２３】したがって、この発明の構成では、送風機
として、例えば斜流送風機を採用した場合に、上記請求
項１，２，３，４又は５の発明と同様の作用を有効に得
ることができる。Therefore, according to the configuration of the present invention, when a blower, for example, is used as the blower, the same operation as the above-mentioned inventions of claims 1, 2, 3, 4 or 5 can be effectively obtained.
【００２４】[0024]
【発明の効果】以上の結果、本願各発明の送風機用羽根
車によると、羽根後縁部のセレーション部による騒音低
減効果が、さらに向上することになり、より静粛性の高
い送風機をコスト増大を招くことなく提供することが可
能となる。As described above, according to the impeller for a blower according to the present invention, the noise reduction effect by the serration portion at the trailing edge of the blade is further improved, and the cost of a more silent blower can be increased. It can be provided without inviting.
【００２５】[0025]
【発明の実施の形態】（実施の形態１）図１〜図５は、
本願発明の実施の形態１に係る送風機用羽根車およびそ
の羽根部の構成と作用並びに効果を示している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) FIGS.
1 shows the configuration, operation, and effects of an impeller for a blower and a blade portion according to Embodiment 1 of the present invention.
【００２６】図１は、送風機として例えばプロペラファ
ン等の軸流型送風機を採用した場合の羽根車１部分の全
体的な構成を示している。図１中、符号２はハブ、３は
羽根、３ａは羽根３の前縁部、３ｂは羽根３の後縁部で
あり、羽根車１は、モータの駆動軸に固定されるハブ２
の外周面に上記複数枚の羽根３，３・・・を所定の角度
で一体化して構成されている。FIG. 1 shows the overall configuration of the impeller 1 when an axial flow type blower such as a propeller fan is employed as a blower. In FIG. 1, reference numeral 2 denotes a hub, 3 denotes a blade, 3a denotes a front edge of the blade 3, 3b denotes a rear edge of the blade 3, and an impeller 1 is a hub 2 fixed to a drive shaft of a motor.
Are integrally formed at a predetermined angle on the outer peripheral surface of the blade.
【００２７】そして、各羽根３は、例えば図２のような
中実体よりなる厚翼構造（エアフォイル構造）を有して
構成されている。そして、その後縁部３ｂ，３ｂ・・・
には、図３に詳細に示すように、凹部４ａ，４ａ・・・
と凸部４ｂ，４ｂ・・・とよりなるノコギリ歯のセレー
ション部４が、当該羽根３の正圧面３ｃ側に所定角θ 1
傾斜させて設けられている。なお、符号３ｄは同羽根３
の負圧面である。Each blade 3 is, for example, as shown in FIG.
With a thick wing structure (airfoil structure) consisting of a solid body
It is configured. And then the edges 3b, 3b ...
As shown in detail in FIG. 3, the recesses 4a, 4a.
Of the saw-tooth consisting of the projections 4b, 4b,...
Of the blade 3 on the pressure side 3c side by a predetermined angle θ. 1
It is provided to be inclined. Reference numeral 3d denotes the blade 3
Is the negative pressure surface.
【００２８】すなわち、該構成の羽根３の場合には、所
定肉厚の厚翼構造をなし、その前縁部３ａには所定曲率
半径の円弧面が形成されることになることから、同羽根
３の前縁部３ａで上記正圧面３ｃおよび負圧面３ｄ両面
側へのコアンダ効果が生じ、羽根３の両面上の流れの変
動（圧力変動）をなくして騒音を低減することができ
る。しかも、該構成の場合には、上記図３に詳細に示す
ように、羽根３の後縁部３ｂにノコギリ歯状のセレーシ
ョン部４を設けて、羽根３の負圧面３ｄ側の気流と正圧
面３ｃ側の気流との後縁部３ｂ側での合流を徐々に起さ
せて、両者の流れの合流（混合）がスムーズに行われる
ようにする一方、同セレーション部４の凸部４ｂ，４ｂ
・・・を特に羽根３，３・・・の正圧面３ｃ，３ｃ・・
・側に所定の角度θ1だけ傾斜させて設けているので
（θ2＜１８０°）、図４に示すように、羽根正圧面３
ｃ，３ｃ・・・側の流れがセレーション部４の凸部４
ｂ，４ｂ・・・間の凹部４ａ，４ａ・・・を有効に通過
して後流渦を分割細分化する。That is, in the case of the blade 3 having the above-mentioned structure, the blade 3 has a thick wing structure with a predetermined thickness, and an arc surface having a predetermined radius of curvature is formed at the front edge 3a. The Coanda effect on both sides of the positive pressure surface 3c and the negative pressure surface 3d occurs at the leading edge 3a of the blade 3, and fluctuations (pressure fluctuations) of the flow on both surfaces of the blade 3 can be eliminated to reduce noise. In addition, in the case of this configuration, as shown in detail in FIG. 3, a serration portion 4 having a saw-tooth shape is provided on the trailing edge 3b of the blade 3, so that the air flow on the negative pressure surface 3d side of the blade 3 and the positive pressure surface The airflow on the trailing edge 3b side is gradually caused to merge with the airflow on the 3c side, so that the merging (mixing) of the two flows is performed smoothly, while the convex portions 4b, 4b of the serration portion 4 are formed.
, In particular, the pressure surfaces 3c, 3c,.
-Since it is provided at a side inclined at a predetermined angle θ 1 (θ 2 <180 °), as shown in FIG.
The flow on the side of c, 3c...
b, 4b,... effectively pass through the recesses 4a, 4a,.
【００２９】したがって、上記後縁部３ｂ側で発生する
後流渦が効果的に分割されて細かくなり、かつ後流の速
度欠損が小さくなって、それらにより発生していた騒音
が一層有効に低下するようになるとともに、さらにファ
ン効率が向上する。Accordingly, the wake vortex generated on the trailing edge 3b side is effectively divided and finely divided, and the velocity loss of the wake is reduced, so that the noise generated thereby is more effectively reduced. And the fan efficiency is further improved.
【００３０】したがって、上記のようなセレーション構
造を採用した場合、本例のような後縁部３ｂの肉厚が大
きな厚翼構造の場合にも、後縁部３ｂのセレーション部
４により後縁部３ｂからの放出渦を有効に低減して効率
良く騒音を低減することができるようになるので、従来
のセレーション構造の場合に比べて一層消音効果が向上
する（図５のグラフを参照）。Therefore, when the above-mentioned serration structure is employed, even in the case of a thick wing structure having a large thickness of the trailing edge portion 3b as in the present embodiment, the trailing edge portion 4b of the trailing edge portion 3b forms the trailing edge portion. Since the noises can be efficiently reduced by effectively reducing the vortex emitted from 3b, the noise reduction effect is further improved as compared with the conventional serration structure (see the graph of FIG. 5).
【００３１】（実施の形態２）次に図６は、本願発明の
実施の形態２に係る送風機用羽根車の羽根部の断面構成
を示している。(Embodiment 2) Next, FIG. 6 shows a sectional configuration of a blade portion of an impeller for a blower according to Embodiment 2 of the present invention.
【００３２】この実施の形態のものは、例えば図６に示
すように、上記実施の形態１における厚翼構造の羽根
３，３・・・として、羽根３本体の内部を全体として必
要な剛性が得られる可及的に広い範囲で中空部５に形成
し、可及的な軽量化を図った中空厚翼羽根を採用したこ
とを特徴としている。In this embodiment, as shown in FIG. 6, for example, the blades 3, 3... Of the thick wing structure in the first embodiment have the necessary rigidity as a whole inside the main body of the blade 3. It is characterized by adopting hollow thick blades formed in the hollow portion 5 in the widest possible range to obtain the lightest possible weight.
【００３３】このような中空体よりなる厚翼羽根の場合
には、上記実施の形態１自体の作用効果に加えて、さら
に羽根材料を節減することができ、より軽量化すること
が可能であるため、モータの駆動力が小さくて済み、電
力消費量を節減することができメリットを生じる。In the case of such a thick blade made of a hollow body, in addition to the operation and effect of the first embodiment itself, the blade material can be further reduced and the weight can be further reduced. Therefore, the driving force of the motor can be reduced, and the power consumption can be reduced, which is advantageous.
【００３４】（実施の形態３）以上のように、本願発明
のセレーション構造は、全体の肉厚が厚く、セレーショ
ン部の肉厚も厚くなりやすい厚翼構造の羽根の場合に特
に有効である。(Embodiment 3) As described above, the serration structure of the present invention is particularly effective in the case of a blade having a thick wing structure in which the entire thickness is large and the thickness of the serration portion is likely to be large.
【００３５】しかし、上記セレーション構造による騒音
低減作用は、上述のような前縁部でのコアンダ効果を有
しない薄翼構造の羽根の場合にも必要性が高く、その意
義は大きい。そして、該薄翼構造の羽根にセレーション
部を設けようとすると、必要な羽根後縁部の強度（剛
性）を維持するために、同部分を所定レベルの厚さに形
成する必要があり、セレーション部の肉厚も厚くなるの
で、上記厚翼構造の羽根の場合と同様の問題を生じる。However, the noise reduction effect of the serration structure is highly necessary even in the case of a blade having a thin wing structure having no Coanda effect at the leading edge as described above, and its significance is great. In order to provide a serrated portion on the blade of the thin blade structure, it is necessary to form the serrated portion to a predetermined level in order to maintain the required strength (rigidity) of the trailing edge of the blade. Since the thickness of the portion is also increased, the same problem as in the case of the blade having the thick wing structure occurs.
【００３６】したがって、該薄翼構造の羽根の場合に
も、上述のような正圧面側に所定角傾斜させた本願発明
のセレーション構造は有効となる。Therefore, even in the case of the blade having the thin blade structure, the serration structure of the present invention in which the blade is inclined at a predetermined angle toward the pressure side as described above is effective.
【００３７】（他の実施の形態）なお、以上の実施の形
態では、本願発明をプロペラファン等軸流送風機の羽根
車に適用した場合について説明したが、本願発明は斜流
ファン等斜流型送風機の羽根車に対して適用した場合に
も全く同様の作用効果を得ることができる。(Other Embodiments) In the above embodiments, the case where the present invention is applied to an impeller of an axial flow blower such as a propeller fan has been described. When applied to an impeller of a blower, exactly the same operation and effect can be obtained.
【図１】本願発明の実施の形態１に係る送風機用羽根車
の構成を示す正面図である。FIG. 1 is a front view showing a configuration of an impeller for a blower according to Embodiment 1 of the present invention.
【図２】同羽根車の羽根部の断面図（図１のＡ−Ａ）で
ある。FIG. 2 is a cross-sectional view (AA in FIG. 1) of a blade portion of the impeller.
【図３】同羽根部のセレーション部分の斜視図である。FIG. 3 is a perspective view of a serration portion of the blade portion.
【図４】同羽根部のセレーション部分の作用を示す説明
図である。FIG. 4 is an explanatory diagram showing an operation of a serration portion of the blade portion.
【図５】同羽根部のセレーション部分の効果を従来構造
のものと対比して示すグラフである。FIG. 5 is a graph showing the effect of a serrated portion of the blade in comparison with that of a conventional structure.
【図６】本願発明の実施の形態２に係る送風機用羽根車
の羽根部の構成を示す断面図である。FIG. 6 is a cross-sectional view showing a configuration of a blade portion of an impeller for a blower according to Embodiment 2 of the present invention.
【図７】従来の送風機用羽根車の羽根部の構成を示す断
面図である。FIG. 7 is a cross-sectional view showing a configuration of a blade portion of a conventional impeller for a blower.
【図８】同従来の羽根車の羽根前縁部に設けられたセレ
ーション部の構成を示す斜視図である。FIG. 8 is a perspective view showing a configuration of a serration provided on a blade front edge of the conventional impeller.
【図９】同従来のセレーション部の作用上の問題点を示
す説明図である。FIG. 9 is an explanatory view showing a problem in operation of the conventional serration section.
１は送風機用羽根車、２はハブ、３は羽根、３ａは前縁
部、３ｂは後縁部、３ｃは正圧面、３ｄは負圧面、４は
セレーション部、４ａは凹部、４ｂは凸部、５は中空部
である。1 is an impeller for a blower, 2 is a hub, 3 is a blade, 3a is a leading edge, 3b is a trailing edge, 3c is a positive pressure surface, 3d is a negative pressure surface, 4 is a serration portion, 4a is a concave portion, and 4b is a convex portion. Reference numeral 5 denotes a hollow portion.
Claims (7)
の外周面に複数枚の羽根（３），（３）・・・を所定の
角度で一体化してなる送風機用羽根車において、上記羽
根（３），（３）・・・の後縁部（３ｂ），（３ｂ）・
・・にセレーション部（４）を設けるとともに、該セレ
ーション部（４）の凸部（４ｂ），（４ｂ）・・・を正
圧面（３ｃ），（３ｃ）・・・側に傾斜させたことを特
徴とする送風機用羽根車。1. A hub fixed to a drive shaft of a motor.
Are integrated with a plurality of blades (3), (3)... At a predetermined angle on the outer peripheral surface of the blade (3), (3). 3b), (3b)
.. the serrations (4) being provided at the same time, and the projections (4b), (4b)... Of the serrations (4) being inclined toward the positive pressure surfaces (3c), (3c). An impeller for a blower.
の羽根よりなることを特徴とする請求項１記載の送風機
用羽根車。2. The impeller for a blower according to claim 1, wherein each of the blades (3) comprises a blade having a thin blade structure.
の羽根よりなることを特徴とする請求項１記載の送風機
用羽根車。3. The impeller for a blower according to claim 1, wherein the blades (3), (3)... Are blades having a thick blade structure.
が、中実体よりなることを特徴とする請求項３記載の送
風機用羽根車。4. A blade having a thick wing structure (3).
4. An impeller for a blower according to claim 3, wherein the impeller is a solid body.
が、中空体よりなることを特徴とする請求項３記載の送
風機用羽根車。5. A blade having a thick wing structure (3).
4. The impeller for a blower according to claim 3, wherein the member comprises a hollow body.
とする請求項１，２，３，４又は５記載の送風機用羽根
車。6. The impeller according to claim 1, wherein the blower is an axial blower.
とする請求項１，２，３，４又は５記載の送風機用羽根
車。7. The impeller for a blower according to claim 1, wherein the blower is a mixed flow blower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25013599A JP3598900B2 (en) | 1999-09-03 | 1999-09-03 | Impeller for blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25013599A JP3598900B2 (en) | 1999-09-03 | 1999-09-03 | Impeller for blower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001073995A true JP2001073995A (en) | 2001-03-21 |
| JP3598900B2 JP3598900B2 (en) | 2004-12-08 |
Family
ID=17203356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25013599A Expired - Fee Related JP3598900B2 (en) | 1999-09-03 | 1999-09-03 | Impeller for blower |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3598900B2 (en) |
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|---|---|---|---|---|
| JP2007002790A (en) * | 2005-06-24 | 2007-01-11 | Mitsubishi Electric Corp | Impeller for cross flow fan |
| JP2007040202A (en) * | 2005-08-03 | 2007-02-15 | Mitsubishi Heavy Ind Ltd | Impeller and propeller fan |
| US7815418B2 (en) | 2005-08-03 | 2010-10-19 | Mitsubishi Heavy Industries, Ltd. | Shroud and rotary vane wheel of propeller fan and propeller fan |
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| CN102588337A (en) * | 2012-02-29 | 2012-07-18 | Tcl空调器(中山)有限公司 | Axial wind wheel structure and axial fan |
| CN102661290A (en) * | 2012-05-02 | 2012-09-12 | 苏州欧比特机械有限公司 | Fan blade for industrial fan |
| CN102865237A (en) * | 2012-09-27 | 2013-01-09 | 宁波狮球通风机电有限公司 | Axial flow fan |
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| WO2018003120A1 (en) * | 2016-07-01 | 2018-01-04 | 三菱電機株式会社 | Propeller fan |
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| CN102588337A (en) * | 2012-02-29 | 2012-07-18 | Tcl空调器(中山)有限公司 | Axial wind wheel structure and axial fan |
| CN102661290A (en) * | 2012-05-02 | 2012-09-12 | 苏州欧比特机械有限公司 | Fan blade for industrial fan |
| CN102865237A (en) * | 2012-09-27 | 2013-01-09 | 宁波狮球通风机电有限公司 | Axial flow fan |
| WO2014050146A1 (en) * | 2012-09-28 | 2014-04-03 | ダイキン工業株式会社 | Propeller fan and air conditioner equipped with same |
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