JPH09250493A - Cross flow fan - Google Patents
Cross flow fanInfo
- Publication number
- JPH09250493A JPH09250493A JP5466396A JP5466396A JPH09250493A JP H09250493 A JPH09250493 A JP H09250493A JP 5466396 A JP5466396 A JP 5466396A JP 5466396 A JP5466396 A JP 5466396A JP H09250493 A JPH09250493 A JP H09250493A
- Authority
- JP
- Japan
- Prior art keywords
- blade
- cross
- longitudinal direction
- phase change
- outer diameter
- 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
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、貫流ファンに係
り、回転音2次および羽根保持板部における左右干渉音
を低減した、音質が良く、風量の多い貫流ファンに関す
るもので、ルームエアコン、除湿機、エアカーテン等に
利用される。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross-flow fan, and relates to a cross-flow fan having a good sound quality and a large air volume, in which secondary sound of rotation and left-right interference noise in a blade holding plate are reduced. Used for machines, air curtains, etc.
【0002】[0002]
【従来の技術】従来の貫流ファンとしては、例えば、図
7に示すような、実開昭61−144294号公報記載
のものが知られている。図7は、従来の貫流ファンの一
例を示す斜視図である。図7に示す貫流ファンは、多数
の羽根10の回転軸心からの半径が羽根の長手方向で変
化する構成のものであるが、羽根保持板11の左右の羽
根位置関係の構成が明確に開示されていなかった。2. Description of the Related Art As a conventional cross-flow fan, for example, the one described in Japanese Utility Model Laid-Open No. 61-144294 as shown in FIG. 7 is known. FIG. 7 is a perspective view showing an example of a conventional cross-flow fan. The cross-flow fan shown in FIG. 7 has a configuration in which the radii of the multiple blades 10 from the rotation axis are changed in the longitudinal direction of the blades, but the configuration of the left and right blade positional relationships of the blade holding plate 11 is clearly disclosed. Was not done.
【0003】また、他の従来の貫流ファンとして、実公
平7−40718号公報記載のものが知られている。該
公報記載の貫流ファンは、羽根保持板間で羽根の外周側
端縁を長手方向の一端側に向かって徐々に内側に沈むよ
うに勾配を大にするものであるが、羽根保持板の左右に
おいて、羽根はファン軸(回転軸)の長手方向に一直線
に並ばないようにずらして設けられ、羽根位置が半径方
向に断層状に急激に変わるものであった。As another conventional cross-flow fan, the one described in Japanese Utility Model Publication No. 7-40718 is known. The cross-flow fan described in the publication has a large gradient so that the outer peripheral edge of the blade gradually sinks inward toward one end side in the longitudinal direction between the blade holding plates. The blades are provided so as not to be aligned in a straight line in the longitudinal direction of the fan shaft (rotational axis), and the blade position is rapidly changed in a radial direction in a fault-like manner.
【0004】[0004]
【発明が解決しようとする課題】この種の貫流ファン
は、原理的に横長さに比例して風量が得られることか
ら、横長にするほどその特徴を生かすことができる。し
かし、横長にするには中間の羽根保持板を多く設けなけ
ればならない。羽根保持板部には本来流れがなく、流入
側では乱れを発生させ、流出側では後流渦を発生させ
る。しかるに、羽根保持板部の左右で羽根の位置および
形状が異なると、左右の風の流れ方が違うため、乱れた
渦を流れの強い方に巻き込んで助長するという干渉が生
じ笛吹き状の回転音2次(回転数×左と右の合計羽根数
の周波数音)を高め、同時に乱流音(一般には回転音2
次の周波数近辺から5000Hzの広い周波数帯域の音
であって、シャ シャ シャという感じの音を含む、以
下これを左右干渉音と呼ぶことにする)の発生により、
騒音のレベルを高め、半連続的な音も含めて生じること
から音質を低下させるという問題があった。In this type of once-through fan, since the air volume is obtained in proportion to the lateral length in principle, the more the lateral length, the more the characteristics can be utilized. However, in order to make it horizontally long, it is necessary to provide many intermediate blade holding plates. There is essentially no flow in the blade holding plate, causing turbulence on the inflow side and wake vortices on the outflow side. However, if the position and shape of the blades are different on the left and right sides of the blade holding plate, the flow of the wind on the left and right is different, which causes interference by entraining the turbulent vortex in the direction with stronger flow and causing a whistle-like rotation. Secondary sound (rotational speed x frequency sound of total number of left and right blades) is increased, and at the same time turbulent sound (generally, rotational sound 2
The sound of a wide frequency band of 5000 Hz from the frequency near the next frequency, including a sound that feels shattered, hereinafter referred to as left-right interference sound)
There is a problem that the sound quality is deteriorated because the noise level is raised and the semi-continuous sound is generated.
【0005】上記左右干渉音は、羽根保持板部の左右に
速度差があることにより羽根保持板部で乱れ、流入時に
は弱い方の流れが強い方の流れに誘引されて、送風方向
に対して傾斜することになり、流出時には弱い方の流れ
の羽根後流渦を含む流れが強い方の流れに巻き込まれて
乱れが大きくなることによるものである。また、騒音の
レベルは強い方の流れに大きく影響する。The left-right interference sound is disturbed in the blade holding plate portion due to the speed difference between the left and right sides of the blade holding plate portion, and when flowing in, the weaker flow is attracted to the stronger flow, which is different from the blowing direction. This is because the flow is inclined, and when it flows out, the flow including the vane wake vortex of the weaker flow is entrained in the stronger flow and the turbulence becomes large. Also, the noise level greatly affects the strong flow.
【0006】また、羽根保持板部においては羽根保持板
が存在することの障害、あるいは左右の一方の羽根位置
外径が例えば小となることにより、羽根保持板を境に一
方の風量も少なくなるという問題があった。加えて、羽
根保持板間においても長手方向の一方に羽根位置外径が
変化すると、流出風量と方向が偏るという問題があっ
た。Further, in the blade holding plate portion, the existence of the blade holding plate is obstructed, or the outer diameter of one of the left and right blade positions is reduced, so that the air volume of one of the blade holding plates is reduced. There was a problem. In addition, when the blade position outer diameter changes in one of the longitudinal directions between the blade holding plates, there is a problem that the outflow air amount and the direction are deviated.
【0007】本発明は、上記従来技術の問題点を解決す
るためになされたもので、本発明の目的(課題)は、羽
根保持板部の左右の流れ干渉により助長される回転音2
次と、左右の流れ干渉により生じる左右干渉音(流体
音)を低減し、音質のよい低騒音貫流ファンを提供する
ことにある。また、加えて、羽根保持区間で生じる回転
音1次(回転数×回転方向羽根数)を低減して、上記回
転音2次の助長作用を少なくし、音質がよく、低騒音で
風量の多い貫流ファンを提供することにある。The present invention has been made in order to solve the above-mentioned problems of the prior art, and the object (problem) of the present invention is to enhance the rotational noise 2 promoted by the left and right flow interference of the blade holding plate portion.
Another object is to provide a low-noise once-through fan with good sound quality by reducing the left-right interference sound (fluid sound) caused by the left-right flow interference. In addition, the primary rotational noise (rotational speed × the number of blades in the rotational direction) generated in the blade holding section is reduced to reduce the promoting action of the secondary rotational sound, resulting in good sound quality, low noise, and a large air volume. To provide a once-through fan.
【0008】[0008]
【課題を解決するための手段】上記課題を解決するため
に、本発明に係る貫流ファンの最も基本的な構成は、回
転軸の長手方向に、適宜の間隔で配置した複数の羽根保
持板と、羽根保持板の外周寄り周方向に間隔をおいて設
けた多数の羽根とからなる貫流ファンにおいて、前記羽
根保持板の左右における前記多数の羽根の取付位置と羽
根形状をほぼ同一に合わせるとともに、羽根保持板間に
おける前記多数の羽根の外径側端の長手方向ラインに、
回転方向に前進する位相と後退する位相とを交互に位相
変化させる形状を形成したものである。すなわち、回転
方向の位相変化にあわせて、長手方向に垂直な断面にお
ける羽根位置外径が当該羽根の長手方向に大と小に位相
変化を形成したものである。In order to solve the above-mentioned problems, the most basic structure of the cross-flow fan according to the present invention is to provide a plurality of blade holding plates arranged at appropriate intervals in the longitudinal direction of the rotating shaft. In a cross-flow fan consisting of a large number of blades provided at intervals in the circumferential direction near the outer periphery of the blade holding plate, the mounting positions and blade shapes of the plurality of blades on the left and right of the blade holding plate are adjusted to be substantially the same. In the longitudinal line of the outer diameter side end of the plurality of blades between the blade holding plates,
The shape is such that a phase advancing in the rotational direction and a phase receding in the rotational direction are alternately changed. That is, according to the phase change in the rotation direction, the outer diameter of the blade position in the cross section perpendicular to the longitudinal direction has a large and small phase change in the longitudinal direction of the blade.
【0009】多数の羽根の外径側端の長手方向ラインに
おける位相変化の形状は、回転方向に前進後退前進ある
いは後退前進後退の順で一回または複数回形成されるも
のであり、また、回転方向の位相変化にあわせて、長手
方向に垂直な断面における羽根位置外径が羽根の長手方
向に大小大あるいは小大小の順で一回または複数回変化
させて形成したものである。さらに、位相変化を波状と
するに加え、回転軸の長手方向に定形化されない間隔で
形成され、回転方向および羽根位置外径の位相変化を羽
根断面の寸法形状あるいは位置の変化により構成したも
のである。The shape of the phase change in the longitudinal line at the outer diameter side end of a large number of blades is formed one or more times in the order of forward and backward forward movement or backward and forward forward and backward movement in the rotational direction, and According to the phase change in the direction, the outer diameter of the blade position in the cross section perpendicular to the longitudinal direction is changed in the longitudinal direction of the blade one or more times in the order of large and small or small and large. Furthermore, in addition to making the phase change wavy, it is formed at intervals that are not standardized in the longitudinal direction of the rotation axis, and the phase change of the rotation direction and the blade position outer diameter is configured by the change in the dimension or shape of the blade cross section. is there.
【0010】また、上記課題を解決するために、本発明
に係る貫流ファンのより具体的な構成は、回転軸の長手
方向に、適宜の間隔で配置した複数の羽根保持板と、羽
根保持板の外周寄り周方向に間隔をおいて設けた多数の
羽根とからなる貫流ファンにおいて、前記複数の羽根保
持板は、回転軸周りに多数の羽根用の溝を設けたもので
あり、全ての羽根保持板の多数の羽根の溝の位置と形状
をほぼ同一に合わせ、多数の羽根を溝に挿入して全数の
羽根保持板を貫通するごとき形態に配置し、その後、各
羽根保持板に前記多数の羽根を固定させて横長な籠状羽
根車として構成し、羽根保持板間における前記多数の羽
根の外径側端の長手方向ラインに、回転方向に前進する
位相と後退する位相とを交互に位相変化させる形状を形
成したものである。In order to solve the above-mentioned problems, a more specific structure of the cross-flow fan according to the present invention has a plurality of blade holding plates arranged at appropriate intervals in the longitudinal direction of the rotating shaft, and a blade holding plate. In the cross-flow fan consisting of a large number of blades provided at intervals near the outer periphery of the blade, the plurality of blade holding plates are provided with grooves for a large number of blades around the rotation axis, and all blades Match the positions and shapes of the grooves of the many blades on the holding plate, insert many blades into the grooves, and arrange them so that they penetrate all the blade holding plates. The blades of the blades are fixed to form a horizontally long cage impeller, and a phase advancing in the rotational direction and a phase receding in the rotational direction are alternately arranged on the longitudinal lines of the outer diameter side ends of the plurality of blades between the blade holding plates. It is a shape that changes the phase.
【0011】さらに、回転方向の位相変化が波状であ
り、多数の羽根の長手方向ラインにおける位相変化の形
状は、回転方向に前進後退前進あるいは後退前進後退の
順で一回または複数回形成され、あわせて、長手方向に
垂直な断面における羽根位置外径が当該羽根の長手方向
に大小大あるいは小大小の位相変化に形成され、全ての
羽根保持板部における羽根の断面形状と羽根の取付位置
をほぼ同じにしたものである。Further, the phase change in the rotation direction is wavy, and the shape of the phase change in the longitudinal direction line of a large number of blades is formed once or a plurality of times in the rotation direction in the order of forward / backward forward or backward forward / backward. In addition, the outer diameter of the blade position in the cross section perpendicular to the longitudinal direction is formed in a phase change of large and small or small and large in the longitudinal direction of the blade, and the cross-sectional shape of the blade and the mounting position of the blade in all blade holding plate parts are set. It is almost the same.
【0012】例えば、回転方向の位相変化または羽根位
置外径の位相変化の形態は、羽根の幅方向の内周側の一
端を基準に、長手方向に垂直な断面における弦長の大な
る部分で曲率半径を大にし、弦長の小なる部分では曲率
半径を小にして形成したもの、長手方向に垂直な断面に
おける断面形状をほぼ同一にし、弦と直角な方向に前後
させて形成したもの、羽根の幅方向の内周側の一端を基
準に他端の外周側を回転方向に前進または後退させて形
成したものなどがある。For example, the form of the phase change in the rotation direction or the phase change in the blade position outer diameter is based on one end on the inner peripheral side in the width direction of the blade, and is a portion where the chord length is large in a cross section perpendicular to the longitudinal direction. Those with a large radius of curvature and a small radius of curvature in the part where the chord length is small, those with almost the same cross-sectional shape in the cross section perpendicular to the longitudinal direction, and those that are formed back and forth in the direction perpendicular to the chord, There is a blade formed by advancing or retracting the outer peripheral side of the other end in the rotational direction with one end on the inner peripheral side in the width direction of the blade as a reference.
【0013】また、例えば、羽根を、幅方向の一端を長
手方向に直線とし、他端を前記一端を基準に長手方向に
幅を変化させ、長手方向に垂直な断面は少なくとも一部
をまたは全部を円弧とし、各部所の断面が同一な断面ラ
インに重なるごとくするなどの寸法形状の変化で構成す
るものである。加えて、羽根断面の羽根車外周寄りの円
弧は、弦長が大なる部分ほどその断面円弧半径を大きく
して、風の流入、流出に適する羽根傾斜の向きを得たも
のである。また、羽根は金属材として半径方向から挿入
することにより製作も容易なものとなる。Further, for example, one end of the blade in the width direction is made to be a straight line in the longitudinal direction, and the other end is changed in width in the longitudinal direction with reference to the one end, and a cross section perpendicular to the longitudinal direction is at least a part or all. Is a circular arc, and the cross-section of each part is formed so as to overlap the same cross-section line. In addition, the arc of the blade cross section closer to the outer circumference of the impeller has a larger arc length as the chord length increases to obtain a blade inclination direction suitable for inflow and outflow of wind. Further, the blade can be easily manufactured by inserting it from the radial direction as a metal material.
【0014】[0014]
【発明の実施の形態】以下本発明の各実施の形態を図1
ないし図6を参照して説明する。 〔実施の形態 1〕図1は、本発明の一実施の形態に係
る貫流ファンの要部形状を示す斜視図、図2は、図1の
要部のE−E矢視断面図である。図1において、1は駆
動軸を取り付けるボスである。2は、回転軸の長手方向
に適宜間隔で配置した羽根保持板であり、この羽根保持
板2は、金属製であって、回転軸の長手方向に、ボス寄
りでは短間隔に、中間寄りでは長間隔に複数枚配置した
ものである。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIG.
It will be described with reference to FIGS. [Embodiment 1] FIG. 1 is a perspective view showing the shape of a main part of a cross-flow fan according to an embodiment of the present invention, and FIG. 2 is a sectional view of the main part of FIG. In FIG. 1, reference numeral 1 is a boss to which a drive shaft is attached. Reference numeral 2 denotes a blade holding plate arranged at appropriate intervals in the longitudinal direction of the rotating shaft. The blade holding plate 2 is made of metal, and is arranged in the longitudinal direction of the rotating shaft at short intervals near the boss and at the intermediate position. Multiple sheets are arranged at long intervals.
【0015】各々の羽根保持板2は、リング状のもの
で、回転軸周りの外周寄りに、外周側から周方向に多数
の羽根用の溝3を設けている。これらすべての羽根保持
板2の外径、および羽根用の溝3の位置と形状とは同一
に製作されている。貫流ファンのボス1側と他方端(図
示せず)とはリング状の内方穴を各々ボス部品、軸部品
によって閉鎖されている。なお、羽根保持板は、リング
状のものに限らず円板でも差し支えない。Each of the blade holding plates 2 is ring-shaped, and is provided with a number of blade grooves 3 in the circumferential direction from the outer peripheral side near the outer periphery around the rotation axis. The outer diameters of all of these blade holding plates 2 and the positions and shapes of the blade grooves 3 are made the same. Ring-shaped inner holes are closed at the boss 1 side and the other end (not shown) of the cross-flow fan by boss parts and shaft parts, respectively. The blade holding plate is not limited to the ring-shaped one and may be a disc.
【0016】4は、羽根用の溝3に挿入した金属製の多
数の羽根であって、羽根4は、羽根保持板2に半径方向
から挿入して羽根保持板2を貫通するごとき形態に構成
されて、その後羽根保持板2の外周をロ−ラで潰すこと
により固定される。このようにして、貫流ファンは横長
な籠状羽根車(以下単に羽根車という)に構成されて完
成する。Reference numeral 4 denotes a large number of metallic blades inserted into the blade grooves 3, and the blades 4 are configured to be inserted into the blade holding plate 2 from the radial direction and penetrate the blade holding plate 2. After that, the blade holding plate 2 is fixed by crushing the outer periphery of the blade holding plate 2 with a roller. In this way, the cross-flow fan is formed into a horizontally long cage impeller (hereinafter simply referred to as impeller) and completed.
【0017】羽根4について、さらに詳細に図2を参照
して説明する。羽根4は、羽根車の内周側に位置する羽
根断面の下端4saは長手方向(軸方向)に直線状とな
っている。羽根保持板間すなわち羽根保持区間における
羽根断面の羽根車の外周側に位置する羽根の上端4a,
4bは、羽根の下端4saを基準に羽根断面の幅すなわ
ち弦長Ca,Cbを変化させる。そして、ボス1寄りの
間隔の狭い第一羽根保持区間L1においては、長手方向
に波状に大小大(弦長Ca,Cb,Ca)と変化させ、
次の間隔の広い第二羽根保持区間L2においては、長手
方向に波状に大小大小大(弦長Ca,Cb,Ca,C
b,Ca)と変化させて大小を2回繰り返す形状となっ
ている。The blade 4 will be described in more detail with reference to FIG. In the blade 4, the lower end 4sa of the blade cross section located on the inner peripheral side of the impeller is linear in the longitudinal direction (axial direction). The upper ends 4a of the blades located between the blade holding plates, that is, on the outer peripheral side of the impeller in the blade cross section in the blade holding section,
4b changes the width of the blade cross section, that is, the chord lengths Ca and Cb with reference to the lower end 4sa of the blade. Then, in the first blade holding section L 1 having a narrow interval near the boss 1, the size is changed in a wave shape in the longitudinal direction from large to small (chord length Ca, Cb, Ca),
In the next second blade holding section L 2 with a wide interval, the large-sized large-small-sized (chord length Ca, Cb, Ca, C
(b, Ca) and the shape is repeated twice.
【0018】図1に示すように、羽根保持区間L1,
L2,L3・・・の始まりと終わりでは、羽根断面は大か
ら始まって大で終わる構成となっている。羽根4の大な
る弦長Caの部分(図1の断面A)と小なる弦長Cbの
部分(図1の断面B)との間隔、すなわち図1に示す間
隔l1,l2,l3・・・は定形化しない間隔となってい
る。As shown in FIG. 1, the blade holding section L 1 ,
At the beginning and the end of L 2 , L 3, ..., The blade cross section has a structure starting from large and ending at large. The interval between the large chord length Ca of the blade 4 (section A in FIG. 1) and the small chord length Cb (section B in FIG. 1), that is, the intervals l 1 , l 2 , and l 3 shown in FIG. ... are non-standardized intervals.
【0019】図2は、羽根4の長手方向に垂直な断面の
弦長の大なる部分A(弦長Ca)と小なる部分B(弦長
Cb、ハンチングで示す)の2個所を代表的に示したも
のである。回転軸の長手方向に垂直な断面における羽根
の位置する外径を、本明細書では羽根位置外径という。
一点鎖線Daは羽根位置外径の大なる部分の包絡線、一
点鎖線Dbは羽根位置外径の小なる部分の包絡線、一点
鎖線Dsは羽根位置内径の包絡線である。FIG. 2 typically shows two places, a large chord length portion A (chord length Ca) and a small chord portion B (chord length Cb, indicated by hunting) of a cross section perpendicular to the longitudinal direction of the blade 4. It is shown. The outer diameter at which the blade is located in a cross section perpendicular to the longitudinal direction of the rotation axis is referred to as the blade position outer diameter in this specification.
The dashed-dotted line Da is the envelope of the portion where the blade position outer diameter is large, the dashed-dotted line Db is the envelope of the portion where the blade position outer diameter is small, and the dashed-dotted line Ds is the envelope of the blade position inner diameter.
【0020】羽根4の断面は少なくとも一部を円弧とす
るかまたは全部を円弧として、各部所の断面は長手方向
に見て同一な断面ラインに重なるごとく形成されてい
る。また、断面Bよりも弦長が大になって外方に出る部
分の断面Aの円弧半径Raは断面Bの円弧半径Rbより
も大きく形成されている。羽根保持板2に対応する部分
の各断面の寸法形状は全く同一(図1に示す本実施の形
態では断面A)になっている。At least a part of the blade 4 has a circular arc or the whole of the blade has a circular arc, and the cross sections of the respective portions are formed so as to overlap with the same cross sectional line when viewed in the longitudinal direction. Further, the arc radius Ra of the cross section A, which is a portion having a longer chord length than the cross section B and protruding outward, is formed larger than the arc radius Rb of the cross section B. The dimensional shape of each cross section of the portion corresponding to the blade holding plate 2 is exactly the same (cross section A in the present embodiment shown in FIG. 1).
【0021】上記羽根4を用いた羽根車は横長であり、
羽根4を軸に平行に取り付けるだけで、上記羽根の羽根
保持区間における外径側端の長手方向ラインは、弦長の
大なる部分Aでは回転方向Nに前進する位置となり、弦
長の小なる部分Bでは回転方向Nに後退する位置とな
る。すなわち、前進後退前進あるいは後退前進後退の順
で一回または複数回の波状に位相変化する構成である。
また、回転方向Nの位相変化にあわせて、羽根位置外径
が、前進部では大(Da)、後退部では小(Db)とな
って、長手方向に大小大あるいは小大小の順で一回また
は複数回の波状に位相変化する構成の貫流ファンとなつ
ている。The impeller using the blade 4 is horizontally long,
By simply mounting the blade 4 in parallel with the axis, the longitudinal line of the outer diameter side end of the blade holding section of the blade moves to the position of advancing in the rotation direction N in the portion A where the chord length is large, and the chord length is small. In the portion B, the position is set back in the rotation direction N. That is, the configuration is such that the phase is changed once or a plurality of times in a wavy manner in the order of forward / backward forward or backward / forward / backward.
Further, in accordance with the phase change in the rotation direction N, the outer diameter of the blade position becomes large (Da) in the advancing portion and small (Db) in the retreating portion, and once in the order of large and small or small and large in the longitudinal direction. Alternatively, it is a once-through fan having a structure in which the phase is changed a plurality of times in a wave shape.
【0022】上記のごとく構成した貫流ファンは、羽根
保持板2に羽根4を貫通するごとき形態にしてあるの
で、羽根保持板2の左右では羽根位置が回転方向Nおよ
び半径方向にほぼ一致した位置となり、形状もほぼ一致
したものとなっている。したがって、流入時および流出
時の左右の風の流れ方が同じになつて、羽根保持板2部
による乱れの発生が少なくなり、また、流れの干渉が少
なくなって回転音2次および左右干渉音を低減できる。Since the cross-flow fan constructed as described above has a form in which the blade 4 penetrates the blade holding plate 2, the blade positions on the left and right of the blade holding plate 2 are substantially coincident with the rotational direction N and the radial direction. And the shapes are almost the same. Therefore, the left and right winds flow in the same way at the time of inflow and at the time of outflow, so that the occurrence of turbulence due to the blade holding plate 2 portion is reduced, and the interference of the flow is reduced, so that the rotation sound secondary and the left and right interference sounds are generated. Can be reduced.
【0023】また、羽根保持板2を境とした左右で同一
の風量が得られることになり、加えて、羽根保持区間L
1,L2,L3・・・においては、両端が同一弦長で、回
転方向に同一位相で、羽根位置外径も同一であることに
より、一端側に偏ることが少なく、貫流ファン全長とし
ても本来の軸に垂直な方向に効率良く送風することがで
き、風量を増加できる。Further, the same air volume is obtained on the left and right with the blade holding plate 2 as a boundary, and in addition, the blade holding section L
In 1 , L 2 , L 3, ..., Both ends have the same chord length, the same phase in the rotation direction, and the same blade position outer diameter, so there is little deviation toward one end, and the total length of the cross-flow fan is Can efficiently blow air in the direction perpendicular to the original axis, and can increase the air volume.
【0024】さらに、羽根保持板2寄りの弦長が大きく
て羽根位置外径の大なる部分(弦長Ca、羽根位置外径
Da)においては、羽根の取付角θa(回転中心Oから
外周側端を結ぶ直線と弦の両端を結ぶ直線のなす角度)
が大となる。そこで、隣接羽根との間に形成される羽根
間通路幅が狭くなって流入量を抑制でき能力が抑制され
る。また、弦長が小さくて羽根位置外径の小なる部分に
おいては、羽根の取付角θbが小となる。そこで、羽根
間通路幅が広くなって流入量が増し能力が高められるこ
とになる。Further, in a portion where the chord length near the vane holding plate 2 is large and the vane position outer diameter is large (chord length Ca, vane position outer diameter Da), the blade mounting angle θa (from the rotation center O to the outer peripheral side). (An angle formed by a straight line connecting the ends and a straight line connecting both ends of the string)
Is large. Therefore, the width of the inter-blade passage formed between the adjacent blades is narrowed, the inflow amount can be suppressed, and the capacity is suppressed. Further, in the portion where the chord length is small and the blade position outer diameter is small, the blade mounting angle θb is small. Therefore, the width of the passage between the blades is widened to increase the inflow amount and enhance the performance.
【0025】また、羽根断面の円弧は弦長の大なる部分
ほどその断面円弧半径Raを大きくして、弦長が大きい
部分の外周角βa(回転中心か外周側端を結ぶ直線の接
線と外周側端における羽根円弧の接線とのなす角度)か
ら弦長が小さい部分の外周角βbに至り周速度が小にな
るのに合わせて次第に大きくしている。したがって、羽
根に対する風の流入,流出の仕方を貫流ファン全長に亘
ってほぼ均一化することができる。Further, the arc of the blade cross section is such that the larger the chord length is, the larger the cross section arc radius Ra is, and the outer circumference angle βa (the tangent line of the straight line connecting the center of rotation or the outer circumference side end and the outer circumference) The angle is gradually increased from the angle formed by the tangent line of the blade arc at the side edge) to the outer peripheral angle βb of the portion where the chord length is small and the peripheral speed becomes small. Therefore, it is possible to make the manner of inflow and outflow of air to the blades substantially uniform over the entire length of the cross-flow fan.
【0026】ここで、羽根保持板2が存在することの障
害によるこれまでの羽根保持板近辺の風量減少は、弦長
Caの増加あるいは羽根断面の羽根車外周寄りの円弧半
径Rbが大きめになることによる外周角βaの増加の調
整により改善できる。上記のように、貫流ファン全長に
亘って送風作用を均一化させるように改善することによ
って、回転音2次および左右干渉音を効果的に低減でき
るばかりか、音質を良好にし、騒音レベルの低減あるい
は風量の増加を図ることができる。Here, the decrease in the air volume in the vicinity of the blade holding plate so far due to the obstacle due to the existence of the blade holding plate 2 increases the chord length Ca or increases the arc radius Rb of the blade section near the outer circumference of the impeller. This can be improved by adjusting the increase in the outer peripheral angle βa. As described above, by improving so that the air blowing action is made uniform over the entire length of the cross-flow fan, not only the secondary sound of rotation and the left-right interference sound can be effectively reduced, but also the sound quality is improved and the noise level is reduced. Alternatively, the air volume can be increased.
【0027】回転音1次に関しては、羽根4の羽根車の
外周側に位置する上端を、内周側の他端4saを基準に
して、長手方向に大小大あるいは小大小の順で一回また
は複数回変化させているので、外周側に位置する羽根の
上端4aと4bとを結ぶ長手方向に見えるラインは、回
転軸に対して波状に傾斜を形成することになり、同一羽
根上において、回転方向Nに対して前進後退前進あるい
は後退前進後退の順で一回または複数回の位相変化を形
成し、羽根4に風が流入通過する場合の圧力を時間的お
よび場所的に分散させて、画一的な圧力変動を少なくす
ることができ、騒音を低減することができる。Regarding the primary rotational sound, the upper end of the blade 4 located on the outer peripheral side of the impeller is referenced once with the other end 4sa on the inner peripheral side in the order of large and small or small and large, or Since it is changed a plurality of times, the line seen in the longitudinal direction connecting the upper ends 4a and 4b of the blades located on the outer peripheral side forms a wavy inclination with respect to the rotation axis, and the line is rotated on the same blade. A phase change is formed once or a plurality of times in the order of forward / backward advance or backward / forward / backward with respect to the direction N, and the pressure when the wind flows in and passes through the blades 4 is dispersed temporally and spatially. One-time pressure fluctuation can be reduced, and noise can be reduced.
【0028】本実施の形態では、羽根4について、各部
位の断面は長手方向に見て同一な断面ラインに重なるご
とくして製作し、軸に平行に取り付けるのみで位相変化
を大きく得て圧力変動を分散し、回転音1次を効果的に
低減できる。この場合、弦長が大になって外方に出る部
分の断面Aの円弧半径Raは断面Bの円弧半径Rbより
も大きくしてあるが、この外方に出る部分については直
線状であっても前記位相変化を得ることができる。ま
た、羽根4の断面の他の部分の一部が直線であっても本
発明の主旨から外れることはない。In the present embodiment, the blade 4 is manufactured so that the cross-section of each part overlaps the same cross-section line when viewed in the longitudinal direction, and a large phase change can be obtained by simply mounting the blade 4 in parallel with the axis to achieve pressure fluctuation. Can be dispersed to effectively reduce the primary sound of rotation. In this case, the arc radius Ra of the cross-section A of the portion that extends to the outside due to the increased chord length is made larger than the arc radius Rb of the cross-section B, but the portion that extends to the outside is linear. Can also obtain the phase change. Even if a part of the other part of the cross section of the blade 4 is a straight line, it does not deviate from the gist of the present invention.
【0029】また、上記のように羽根4を製作すること
により、羽根保持区間L1,L2,L3・・・における羽
根位置外径が弦長の大小変化にに伴って長手方向に大小
大の順で波状に一回または複数回変化することになる。
すなわち、半径方向にも位相がずれることになるので、
羽根間寸法および風の取り込み位置、放出位置が長手方
向に少しづつ異なることになり、回転方向に前後する位
相変化と同様な作用となつて、回転音1次を低減する効
果を高めることができる。Further, by manufacturing the blades 4 as described above, the outer diameters of the blade positions in the blade holding sections L 1 , L 2 , L 3 ... Are larger and smaller in the longitudinal direction as the chord length changes. It will change in a wavy manner one or more times in descending order.
In other words, since the phase will also shift in the radial direction,
The inter-blade dimension, the wind intake position, and the wind discharge position are slightly different in the longitudinal direction, and the same effect as the phase change before and after in the rotation direction can be obtained, and the effect of reducing the primary sound of rotation can be enhanced. .
【0030】さらに、羽根保持区間において、相のずれ
た流れの作用が無理なく行われることになるので、羽根
保持部近辺の圧力変動を助長する作用が少なくなる。よ
って、羽根保持部の回転音2次および左右干渉音の低減
作用がスム−ズに行われることにもなる。さらにまた、
回転方向および半径方向の位相ずれを、長手方向に定形
化しない間隔l1,l2,l3・・・で形成したことによ
り、そのずれの勾配も少しづつ異なることから、流れ方
および乱れの一様性を崩す作用を、無理なく一層促進
し、長手方向の共鳴も生じにくくして回転音1次の低減
効果を向上できる。Further, in the blade holding section, the action of the flow having the shifted phases is performed without difficulty, so that the action of promoting the pressure fluctuation in the vicinity of the blade holding portion is reduced. Therefore, the secondary rotation sound of the blade holding portion and the left and right interference sound can be smoothly reduced. Furthermore,
Since the phase shifts in the rotational direction and the radial direction are formed with the intervals l 1 , l 2 , l 3 ... Which are not fixed in the longitudinal direction, the gradients of the shifts are slightly different. The effect of breaking the uniformity can be further facilitated without difficulty, and resonance in the longitudinal direction is less likely to occur, so that the effect of reducing the first-order rotational noise can be improved.
【0031】また、回転音1次の低減としては、上記羽
根車構造に加えて、羽根全体を軸方向に対して傾斜させ
る、あるいは羽根の回転方向の配置を不等間隔にするこ
とにより、低減効果を向上できる。In addition to the above-mentioned impeller structure, the primary rotation noise can be reduced by inclining the entire blade with respect to the axial direction or arranging the blades in the rotational direction at unequal intervals. The effect can be improved.
【0032】羽根の製作に関しては、各羽根保持板2に
関しては羽根用溝3の位置と形状は同じであるので、同
一の型が使用できる。また、羽根4に関しても各部位の
断面は長手方向に見て同一な断面ラインに重なるごとく
してあるので、断面形状が長手方向に同じ型が使用でき
る利点がある。特に、これを金属材としてプレス加工等
で製作することは容易であり、薄板も使用でき、温度変
化に強い貫流ファンを得ることができる。Regarding the manufacture of the blades, since the position and shape of the blade groove 3 are the same for each blade holding plate 2, the same mold can be used. Further, regarding the blade 4, since the cross section of each portion is formed so as to overlap the same cross section line when viewed in the longitudinal direction, there is an advantage that a mold having the same cross sectional shape in the longitudinal direction can be used. In particular, it is easy to manufacture this as a metal material by pressing or the like, a thin plate can be used, and a cross-flow fan resistant to temperature changes can be obtained.
【0033】また、強度に関しても、羽根4を弦長の大
なる部分で保持しているので堅固となり、ねじり強度も
大きい羽根車となる。積み重ね時には羽根保持板2が支
えとなって変形を防止できる。弦長の変化の順序を小大
小として、羽根4を弦長の小(Cb)なる部分で保持し
た場合には羽根保持板2の径を小にでき材料を少なくで
きるというその実施形態特有の効果がある。Further, regarding the strength, since the blade 4 is held by a portion having a large chord length, the blade becomes rigid and the impeller has a large torsional strength. When stacked, the blade holding plate 2 serves as a support to prevent deformation. When the blades 4 are held at a portion where the chord length is small (Cb) by changing the order of the chord length change to small and large, the diameter of the blade holding plate 2 can be made small, and the material can be reduced, which is an effect peculiar to the embodiment. There is.
【0034】なお、羽根4および羽根保持板2は樹脂製
であってもよい。また、製作上に難点があるが、樹脂製
で羽根4と羽根保持板2を周方向に部分的に一体として
これを結合して羽根車を構成しても騒音の改善効果は得
られる。また、前記実施の形態においては、羽根4の羽
根車内周側端は直線状となっているが、長手方向に羽根
位置内径Dsが変化してもよく、例えば、金属加工で製
作する場合には羽根車外周側の変化に合わせることによ
り、回転音1次の低減効果の向上と生産上の板取り向上
とを有効に行うことができる。The blade 4 and the blade holding plate 2 may be made of resin. Further, although there is a problem in manufacturing, the effect of improving noise can be obtained even if the blade 4 and the blade holding plate 2 are made of resin and are partially integrated in the circumferential direction and are combined to form an impeller. Further, in the above embodiment, the inner end of the impeller of the impeller 4 is linear, but the inner diameter Ds of the impeller position may change in the longitudinal direction. By adjusting to the change on the outer peripheral side of the impeller, it is possible to effectively improve the effect of reducing the primary sound of rotation and the improvement of plate cutting in production.
【0035】図3ないし図6は、他の実施の形態であっ
て、羽根について、長手方向から見た断面を同一ライン
に重ねない形態のものである。すなわち、長手方向に沿
って、その垂直断面の羽根の寸法形状あるいは位置を変
化させて、上端を回転方向に前進するものと後退するも
のとを形成したものである。FIGS. 3 to 6 show another embodiment, in which the blades are not overlapped on the same line when viewed in the longitudinal direction. That is, the dimensional shape or position of the blade of the vertical cross section is changed along the longitudinal direction so that the upper end moves forward in the rotational direction and the upper end moves backward.
【0036】〔実施の形態 2〕図3は、本発明の他の
実施の形態に係る貫流ファンの羽根の要部断面図であ
る。図中、図2と同一符号のものは同等部分を示してい
る。図3は、第二の実施の形態を示すもので、回転方向
の位相変化または羽根位置外径の位相変化が、羽根の幅
方向の内周側の一端を基準に、長手方向に、弦長の大な
る部分で曲率半径を大にし、弦長の小なる部分では曲率
半径を小にして形成したものである。[Embodiment 2] FIG. 3 is a cross-sectional view of essential parts of blades of a cross-flow fan according to another embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 2 indicate the same parts. FIG. 3 shows the second embodiment, in which the phase change in the rotation direction or the phase change of the blade position outer diameter has a chord length in the longitudinal direction with reference to one end on the inner peripheral side in the width direction of the blade. Is formed with a large radius of curvature at a large portion of and a small radius of curvature at a portion of small chord length.
【0037】図3に示す形態は、羽根5の下端5sを変
えないで、羽根の弦長を、羽根位置外径の大なる部分で
は羽根位置外径の小なる部分よりも大なる弦長Caにす
るとともに、曲率半径Raを大にし、取付角θaを大に
して羽根の前傾度を強めることにより、羽根位置外径の
大きい分外周角βaを外周角βbより小さくしたもので
ある。すなわち、Ca>Cb、βa<βb、Ra>R
b、θa>θbとなっている。In the embodiment shown in FIG. 3, the lower end 5s of the blade 5 is not changed, and the chord length of the blade is larger in the portion where the outer diameter of the blade position is larger than that in the portion where the outer diameter of the blade position is smaller. In addition, the radius of curvature Ra is increased, the attachment angle θa is increased, and the forward inclination of the blade is strengthened, so that the outer peripheral angle βa is smaller than the outer peripheral angle βb by the larger outer diameter of the blade position. That is, Ca> Cb, βa <βb, Ra> R
b, θa> θb.
【0038】これにより、同一羽根上において、回転方
向と羽根位置外径の位相変化を構成できることになり、
騒音、風量の性能に関して図2に示した第一の実施の形
態と同様な作用効果を得ることができる。特に、本実施
の形態においては、羽根位置外径の大なる部分(Da)
において羽根5aの傾斜が大きいので隣接する羽根との
間の羽根間寸法が小さくなり、長手方向に、羽根間寸法
の変化が得られ、同時に、上記位相変化が大きく得ら
れ、回転音1次を低減できる効果を大きくすることがで
きる。As a result, on the same blade, the phase change between the rotation direction and the blade position outer diameter can be configured.
With regard to the performance of noise and air volume, it is possible to obtain the same operational effects as those of the first embodiment shown in FIG. Particularly, in the present embodiment, the portion where the outer diameter of the blade position is large (Da)
Since the blade 5a has a large inclination, the blade-to-blade dimension between the adjacent blades becomes small, and the blade-to-blade dimension change is obtained in the longitudinal direction. The effect that can be reduced can be increased.
【0039】〔実施の形態 3〕図4は、本発明のさら
に他の実施の形態に係る貫流ファンの羽根の要部断面図
である。図中、図2と同一符号のものは同等部分を示し
ている。図4は、第三の実施の形態を示すものであっ
て、回転方向の位相変化または羽根位置外径の位相変化
が、長手方向に、断面形状をほぼ同一にし、弦と直角な
方向に前後させて形成したものである。[Third Embodiment] FIG. 4 is a cross-sectional view of essential parts of blades of a cross-flow fan according to still another embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 2 indicate the same parts. FIG. 4 shows the third embodiment, in which the phase change in the rotation direction or the phase change in the outer diameter of the blade position makes the cross-sectional shape substantially the same in the longitudinal direction, and the front and rear in the direction perpendicular to the chord. It was formed by doing so.
【0040】図4に示す形態は、羽根6の弦長Ca,C
bと曲率半径Ra,Rbとをともに同じにして、弦と直
角な方向に平行に前後させることにより、羽根位置外径
側と羽根位置内径側に、同一羽根上において、回転方向
に前進するものと後退するものとの位相変化を構成した
ものである。すなわち、Ca=Cb、βa<βb、Ra
=Rb、θa>θbとなっている。The form shown in FIG. 4 is the chord length Ca, C of the blade 6.
b and the radii of curvature Ra and Rb are the same, and are moved back and forth in parallel to the direction perpendicular to the chords so as to move forward in the rotational direction on the same blade at the blade position outer diameter side and the blade position inner diameter side. It constitutes a phase change between the backward and the backward. That is, Ca = Cb, βa <βb, Ra
= Rb, θa> θb.
【0041】これにより、騒音、風量の性能に関して第
一の実施の形態と同様な効果を得ることができる。特
に、本実施の形態においては、羽根の断面形状が同じで
あって、位置が平行に前後するのみであるので、設計製
作が容易であるという利点がある。なお、図4におい
て、回転方向に前進する位置6bの羽根外周角βbは大
になって羽根位置外径Dbの小になる分の性能をカバ−
できて、送風能力を長さ方向に均一にすることができ
る。As a result, the same effects as those of the first embodiment can be obtained with respect to noise and air flow performance. In particular, in the present embodiment, the blades have the same cross-sectional shape and the positions are only forward and backward in parallel, which is advantageous in that the design and manufacture are easy. In FIG. 4, the blade outer peripheral angle βb at the position 6b advancing in the rotational direction becomes large and the blade position outer diameter Db becomes small.
As a result, the blowing capacity can be made uniform in the length direction.
【0042】〔実施の形態 4〕図5は、本発明のさら
に他の実施の形態に係る貫流ファンの羽根の要部断面図
である。図中、図2と同一符号のものは同等部分を示し
ている。図5は、第四の実施の形態を示すものであっ
て、回転方向の位相変化または羽根位置外径の位相変化
が、羽根の幅方向の内周側の一端を基準に他端の外周側
を回転方向に前進または後退させて形成しており、回転
方向に前進する断面では曲率半径を大にし、後退する断
面では曲率半径を小にして形成したものである。[Fourth Embodiment] FIG. 5 is a cross-sectional view of a main part of a blade of a cross-flow fan according to still another embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 2 indicate the same parts. FIG. 5 shows a fourth embodiment in which the phase change in the rotation direction or the phase change in the blade position outer diameter is based on one end on the inner peripheral side in the width direction of the blade and the outer peripheral side on the other end. Is formed by advancing or retracting in the rotational direction, and the radius of curvature is increased in the cross section advancing in the rotational direction, and the radius of curvature is decreased in the receding cross section.
【0043】図5に示す形態は、羽根7の弦長をほぼ同
じにして、下端7saを基準に上端を、回転方向に前進
する7bと後退する7aとし、前進する側の曲率半径R
bを大きくすることにより外周角βbとβaを同じにし
たものであり、同一羽根において、外径側端に回転方向
と羽根位置外径の位相変化を構成したものである。すな
わち、Ca≒Cb、βa=βb、Ra<Rb、θa<θ
bとなっている。In the embodiment shown in FIG. 5, the chord lengths of the blades 7 are set to be substantially the same, and the upper end is referred to the lower end 7sa, and the upper end is set forward 7b and the reverse 7a in the rotational direction.
By increasing b, the outer peripheral angles βb and βa are made the same, and in the same blade, a phase change between the rotation direction and the blade position outer diameter is formed at the outer diameter side end. That is, Ca≈Cb, βa = βb, Ra <Rb, θa <θ
It is b.
【0044】これにより、騒音、風量の性能に関して
は、図2に示した第一の実施の形態と同様な作用効果を
得ることができ、設計製作も図4の実施例と同様に容易
であるという利点がある。なお、外径側端の位相変化は
図4の実施の形態よりも大きく得られる。As a result, with respect to the performance of noise and air volume, it is possible to obtain the same effects as those of the first embodiment shown in FIG. 2, and the design and manufacture are as easy as the embodiment of FIG. There is an advantage. The phase change at the outer diameter side end can be obtained larger than that in the embodiment of FIG.
【0045】〔実施の形態 5〕図6は、本発明のさら
に他の実施の形態に係る貫流ファンの羽根の要部断面図
である。図中、図2と同一符号のものは同等部分を示し
ている。図6は、第五の実施の形態を示すものであっ
て、羽根8の弦長Ca,Cb、曲率半径Ra,Rbを同
じにして、回転角αの位相変化をなすようにして、羽根
位置外径側と羽根位置内径側に、同一羽根上に回転方向
に前後する位相変化を構成したものである。すなわち、
Ca=Cb、βa=βb、Ra=Rb、θa=θbとな
っている。[Fifth Embodiment] FIG. 6 is a cross-sectional view of essential parts of blades of a cross-flow fan according to still another embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 2 indicate the same parts. FIG. 6 shows a fifth embodiment, in which the chord lengths Ca, Cb and the radii of curvature Ra, Rb of the blades 8 are made the same, and the blade position is changed so as to change the phase of the rotation angle α. On the outer diameter side and the blade position inner diameter side, a phase change back and forth in the rotation direction is formed on the same blade. That is,
Ca = Cb, βa = βb, Ra = Rb, and θa = θb.
【0046】これにより、騒音、風量の性能に関して図
2に示した第一の実施の形態と同様な作用効果を得るこ
とができる。特に、本実施の形態では、弦の上端(羽根
の上端)8a,8b、下端8sa,8sbが同じ回転線
上にあり、外周角βbとβaが同じであるので風の流入
流出をスム−ズにし、送風能力が高く得られる利点があ
る。As a result, the same operational effects as those of the first embodiment shown in FIG. 2 can be obtained in terms of noise and air flow performance. Particularly, in the present embodiment, the upper ends (upper ends of the blades) 8a, 8b and the lower ends 8sa, 8sb of the strings are on the same line of rotation, and the outer peripheral angles βb and βa are the same, so that the inflow and outflow of the wind are smoothed. However, there is an advantage that the blowing capacity is high.
【0047】なお、上記各実施の形態において、羽根断
面の弦長の大小大あるいは小大小の順の変化が必ずしも
サインカ−ブのような立派なものでなくてもよく、羽根
保持板部で同一位置、形状であれば、鋸歯状または階段
状部に近く見えるものであってもよい。しかし、この場
合には、羽根保持区間内における変化は、その勾配がお
よそ45°以下に設定するのがよい。本発明では、これ
らを含めて波状と称している。In each of the above-mentioned embodiments, the change in the chord length of the blade cross section in the order of large and small or small and large may not necessarily be a fine one like a sine curve, and is the same in the blade holding plate portion. As long as the position and the shape, it may look like a sawtooth or a stepped portion. However, in this case, the change in the blade holding section is preferably set such that the gradient is about 45 ° or less. In the present invention, these are referred to as wavy.
【0048】上記各実施の形態によれば、羽根保持板2
の左右で羽根4の位置、形状を変えることなく、同一に
して左右の流れの干渉を少なくするので、回転音2次お
よび左右干渉音を低減でき、音質のよい低騒音貫流ファ
ンを提供することができる。また同時に、羽根保持区間
において、各羽根は回転方向に、あるいは半径方向に位
相が変化しているので、羽根保持板部の流れを阻害する
ことなく、回転音1次も低減でき、上記回転音2次の助
長作用を少なくでき、音質がよく、低騒音で、風量の多
い低騒音貫流ファンを提供することができる。According to each of the above embodiments, the blade holding plate 2
Since the left and right blades 4 do not have to be changed in position and shape to be the same to reduce the interference of the left and right flows, it is possible to reduce the secondary sound of rotation and the interference noise of the left and right, and to provide a low noise cross-flow fan with good sound quality. You can At the same time, in the blade holding section, since the phase of each blade changes in the rotation direction or in the radial direction, the rotation sound primary can be reduced without obstructing the flow of the blade holding plate portion. It is possible to provide a low-noise once-through fan that can reduce the secondary promotion effect, have good sound quality, low noise, and a large air volume.
【0049】また、羽根に、回転方向に前進するのと後
退する形態の位相変化を構成し、これを無理のない長手
方向に波状の変化とし、これが同時に半径方向にも位相
変化を構成し、また、長手方向に定形化しない間隔にす
ることにより、一層上記効果の高い貫流ファンを提供す
ることができる。また、羽根保持板2の左右で羽根4の
位置、形状を合わせ、同一羽根上で、回転方向および羽
根位置外径に位相変化を有せしめる構成は、金属加工で
の製作が特に容易である。Further, the blade is provided with a phase change in a manner of advancing and retreating in the rotational direction, and this is made into a wavy change in the longitudinal direction which is natural, and at the same time, a phase change is also made in the radial direction. Further, by providing the intervals that are not standardized in the longitudinal direction, it is possible to provide a cross-flow fan with the above-mentioned effect. Further, the configuration in which the positions and shapes of the blades 4 are aligned on the left and right of the blade holding plate 2 and the phase is changed in the rotation direction and the blade position outer diameter on the same blade is particularly easy to manufacture by metal working.
【0050】[0050]
【発明の効果】以上詳細に説明したように、本発明によ
れば、羽根保持板部の左右の流れ干渉により助長される
回転音2次と、左右の流れ干渉により生じる左右干渉音
(流体音)を低減し、音質のよい低騒音貫流ファンを提
供することができる。また、加えて、羽根保持区間で生
じる回転音1次を低減して、上記回転音2次の助長作用
を少なくし、音質がよく、低騒音で風量の多い貫流ファ
ンを提供することができる。As described above in detail, according to the present invention, the secondary rotational sound promoted by the left and right flow interference of the blade holding plate and the left and right interference sound (fluid noise) generated by the left and right flow interference. ) Is reduced, and a low-noise once-through fan with good sound quality can be provided. In addition, it is possible to provide a cross-flow fan having a good sound quality, a low noise, and a large air volume by reducing the primary effect of the rotational sound generated in the blade holding section to reduce the promoting effect of the secondary rotational sound.
【図1】本発明の一実施の形態に係る貫流ファンの要部
形状を示す斜視図である。FIG. 1 is a perspective view showing a shape of a main part of a cross-flow fan according to an embodiment of the present invention.
【図2】図1の要部のE−E矢視断面図である。FIG. 2 is a sectional view of the main part of FIG. 1 taken along the line EE.
【図3】本発明の他の実施の形態に係る貫流ファンの羽
根の要部断面図である。FIG. 3 is a cross-sectional view of essential parts of blades of a cross-flow fan according to another embodiment of the present invention.
【図4】本発明のさらに他の実施の形態に係る貫流ファ
ンの羽根の要部断面図である。FIG. 4 is a cross-sectional view of essential parts of blades of a cross-flow fan according to still another embodiment of the present invention.
【図5】本発明のさらに他の実施の形態に係る貫流ファ
ンの羽根の要部断面図である。FIG. 5 is a cross-sectional view of essential parts of blades of a cross-flow fan according to still another embodiment of the present invention.
【図6】本発明のさらに他の実施の形態に係る貫流ファ
ンの羽根の要部断面図である。FIG. 6 is a cross-sectional view of essential parts of blades of a cross-flow fan according to still another embodiment of the present invention.
【図7】従来の貫流ファンの一例を示す斜視図である。FIG. 7 is a perspective view showing an example of a conventional cross-flow fan.
1…ボス、2…羽根保持板、3…溝、4…羽根、4a,
4b…羽根の上端、Ca,Cb…弦長、Ra,Rb…円
弧半径、θa,θb…取付角、βa,βb…外周角、L
1,L2,L3…羽根保持区間、l1、l2、l3…間隔、D
a,Db…羽根位置外径、Ds…羽根位置内径、N…回
転方向、O…回転中心。1 ... Boss, 2 ... blade holding plate, 3 ... groove, 4 ... blade, 4a,
4b ... Upper end of blade, Ca, Cb ... Chord length, Ra, Rb ... Arc radius, θa, θb ... Mounting angle, βa, βb ... Outer peripheral angle, L
1 , L 2 , L 3 ... Blade holding section, l 1 , l 2 , l 3 ... Interval, D
a, Db ... blade position outer diameter, Ds ... blade position inner diameter, N ... rotation direction, O ... rotation center.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小筆 裕二 栃木県下都賀郡大平町大字富田800番地 株式会社日立製作所冷熱事業部栃木本部内 (72)発明者 小曽戸 荘一 栃木県下都賀郡大平町大字富田800番地 株式会社日立製作所冷熱事業部栃木本部内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuji Koji 800, Tomita, Ohira-cho, Shimotsuga-gun, Tochigi Pref., Tochigi Headquarters, Hitachi, Ltd. 800 Tomita, Todai, Tochigi Headquarters, Hitachi, Ltd.
Claims (18)
した複数の羽根保持板と、羽根保持板の外周寄り周方向
に間隔をおいて設けた多数の羽根とからなる貫流ファン
において、 前記羽根保持板の左右における前記多数の羽根の取付位
置と羽根形状をほぼ同一に合わせるとともに、 羽根保持板間における前記多数の羽根の外径側端の長手
方向ラインに、回転方向に前進する位相と後退する位相
とを交互に位相変化させる形状を形成したことを特徴と
する貫流ファン。1. A cross-flow fan comprising a plurality of blade holding plates arranged at appropriate intervals in a longitudinal direction of a rotating shaft, and a plurality of blades provided at intervals in a circumferential direction near an outer periphery of the blade holding plate, The positions of attachment of the plurality of blades on the left and right of the blade holding plate and the shape of the blade are set to be substantially the same, and the phase that advances in the rotational direction is aligned with the longitudinal line of the outer diameter side ends of the plurality of blades between the blade holding plates. A cross-flow fan, characterized in that it has a shape in which the phase and the receding phase are alternately changed.
向に垂直な断面における羽根位置外径が当該羽根の長手
方向に大と小に位相変化を形成したことを特徴とする請
求項1記載の貫流ファン。2. The blade position outer diameter in a cross section perpendicular to the longitudinal direction forms a large and small phase change in the longitudinal direction of the blade in accordance with the phase change in the rotation direction. Once-through fan.
における位相変化の形状は、回転方向に前進後退前進あ
るいは後退前進後退の順で一回または複数回形成したも
のであることを特徴とする請求項1記載の貫流ファン。3. The shape of the phase change in the longitudinal direction line of the outer diameter side end of a large number of blades is formed in the rotational direction one or more times in the order of forward / backward advancement or backward / forward / backward movement. The cross-flow fan according to claim 1.
の位相変化が、波状であることを特徴とする請求項1ま
たは2記載のもののいずれかの貫流ファン。4. The cross-flow fan according to claim 1, wherein the phase change in the rotation direction or the phase change in the blade position outer diameter is wavy.
の位相変化が、羽根車の回転軸の長手方向に定形化され
ない間隔で形成されることを特徴とする請求項1または
2記載のもののいずれかの貫流ファン。5. The one according to claim 1, wherein the phase change in the rotational direction or the phase change in the blade position outer diameter is formed at a non-standardized interval in the longitudinal direction of the rotating shaft of the impeller. One-through fan.
の位相変化が、羽根の長手方向に沿って、その垂直断面
の寸法形状あるいは位置の変化により行われたことを特
徴とする請求項1または2記載のもののいずれかの貫流
ファン。6. A phase change in a rotational direction or a phase change of a blade position outer diameter is performed by a change in a dimensional shape or a position of a vertical cross section of the blade along a longitudinal direction of the blade. Alternatively, a cross-flow fan as described in 2 above.
の位相変化が、羽根の弦長あるいは羽根素材幅がほぼ同
一のもので、長手方向に沿って、その垂直断面に位置変
化させて形成されたことを特徴とする請求項1または2
記載のもののいずれかの貫流ファン。7. A phase change in a rotational direction or a phase change in a blade position outer diameter is formed by changing the chord length of the blade or the blade material width substantially, and changing the position in the vertical cross section along the longitudinal direction. Claim 1 or 2 characterized in that
A cross-flow fan of any of the ones listed.
の位相変化が、羽根の弦長変化により行われたことを特
徴とする請求項1または2記載のもののいずれかの貫流
ファン。8. The cross-flow fan according to claim 1, wherein the phase change in the rotation direction or the phase change in the blade position outer diameter is performed by a change in the chord length of the blade.
の位相変化が、羽根の弦長を、内周側に位置する直線状
の他端を基準に長手方向に大小大あるいは小大小の順で
一回または複数回変化させて形成したものであることを
特徴とする請求項1または2記載のもののいずれかの貫
流ファン。9. A phase change in the rotational direction or a phase change in the outer diameter of the blade position changes in the order of the chord length of the blade in the longitudinal direction with respect to the linear other end located on the inner peripheral side in the longitudinal direction. 3. The cross-flow fan according to claim 1, wherein the cross-flow fan is formed by changing it once or a plurality of times.
置した複数の羽根保持板と、羽根保持板の外周寄り周方
向に間隔をおいて設けた多数の羽根とからなる貫流ファ
ンにおいて、 前記複数の羽根保持板は、回転軸周りに多数の羽根用の
溝を設けたものであり、全ての羽根保持板の多数の羽根
の溝の位置と形状をほぼ同一に合わせ、多数の羽根を溝
に挿入して全数の羽根保持板を貫通するごとき形態に配
置し、その後、各羽根保持板に前記多数の羽根を固定さ
せて横長な籠状羽根車として構成し、 羽根保持板間における前記多数の羽根の外径側端の長手
方向ラインに、回転方向に前進する位相と後退する位相
とを交互に位相変化させる形状を形成したことを特徴と
する貫流ファン。10. A cross-flow fan comprising a plurality of blade holding plates arranged at appropriate intervals in a longitudinal direction of a rotating shaft, and a plurality of blades provided at intervals in a circumferential direction near an outer periphery of the blade holding plate, The plurality of blade holding plates are provided with grooves for a large number of blades around the rotation axis, and the positions and shapes of the grooves of the plurality of blades of all the blade holding plates are adjusted to be substantially the same so that a large number of blades are formed. The blades are inserted into the grooves and arranged so as to penetrate all the blade holding plates, and then the large number of blades are fixed to each blade holding plate to form a horizontally long cage impeller. A cross-flow fan having a shape in which a phase advancing in a rotational direction and a phase receding in a rotational direction are alternately changed in a longitudinal direction line at an outer diameter side end of a large number of blades.
数の羽根の長手方向ラインにおける位相変化の形状は、
回転方向に前進後退前進あるいは後退前進後退の順で一
回または複数回形成され、あわせて、長手方向に垂直な
断面における羽根位置外径が当該羽根の長手方向に大小
大あるいは小大小の位相変化に形成され、全ての羽根保
持板部における羽根の断面形状と羽根の取付位置をほぼ
同じにしたことを特徴とする請求項10記載の貫流ファ
ン。11. The phase change in the rotational direction is wavy, and the shape of the phase change in the longitudinal line of the multiple blades is
It is formed once or several times in the order of forward backward backward forward or backward forward backward backward in the rotation direction, and in addition, the blade position outer diameter in the cross section perpendicular to the longitudinal direction changes phase in the longitudinal direction of the blade. 11. The cross-flow fan according to claim 10, wherein the cross-sectional shapes of the blades and the mounting positions of the blades are substantially the same in all the blade holding plate portions.
径の位相変化が、羽根の長手方向に沿って、その垂直断
面の寸法形状あるいは位置の変化により行われたことを
特徴とする請求項10または11記載のもののいずれか
の貫流ファン。12. A phase change in the rotational direction or a phase change in the blade position outer diameter is performed by changing the dimension or shape of the vertical cross section of the blade along the longitudinal direction of the blade. Or a cross-flow fan as described in 11 above.
径の位相変化が、羽根の幅方向の内周側の一端を基準
に、長手方向に垂直な断面における弦長の大なる部分で
曲率半径を大にし、弦長の小なる部分では曲率半径を小
にして形成したものであることを特徴とする請求項10
または11記載のもののいずれかの貫流ファン。13. A phase change in the rotational direction or a change in the blade position outer diameter causes a radius of curvature at a portion having a large chord length in a cross section perpendicular to the longitudinal direction with reference to one end on the inner peripheral side in the width direction of the blade. And a small radius of curvature in a portion having a small chord length.
Or a cross-flow fan as described in 11 above.
径の位相変化が、長手方向に垂直な断面における断面形
状をほぼ同一にし、弦と直角な方向に前後させて形成し
たものであることを特徴とする請求項10または11記
載のもののいずれかの貫流ファン。14. The phase change in the rotational direction or the phase change in the blade position outer diameter is formed by making the cross-sectional shape in a cross section perpendicular to the longitudinal direction substantially the same and moving back and forth in the direction perpendicular to the chord. A cross-flow fan according to any one of claims 10 or 11, characterized.
径の位相変化が、羽根の幅方向の内周側の一端を基準に
他端の外周側を回転方向に前進または後退させて形成し
たものであることを特徴とする請求項10または11記
載のもののいずれかの貫流ファン。15. A change in phase in the rotational direction or a change in outer diameter of a blade position is formed by advancing or retracting the outer peripheral side of the other end in the rotational direction with one end on the inner peripheral side of the width direction of the blade as a reference. A cross-flow fan according to any one of claims 10 or 11, characterized in that
を大にし、後退する断面では曲率半径を小にして形成し
たことを特徴とする請求項15記載の貫流ファン。16. The cross-flow fan according to claim 15, wherein the cross-section fan advancing in the rotational direction has a large radius of curvature and the cross-section receding has a small radius of curvature.
一端を長手方向に直線とし、他端を前記一端を基準に長
手方向に幅を変化させ、長手方向に垂直な断面は少なく
とも一部または全部を円弧とし、各部所の断面が同一な
断面ラインに重なるごとく形成したことを特徴とする請
求項1、請求項10または11記載のもののいずれかの
貫流ファン。17. The blade is made of a metal material, one end in the width direction of the blade is made to be a straight line in the longitudinal direction, the other end is varied in width in the longitudinal direction with reference to the one end, and a cross section perpendicular to the longitudinal direction is at least one. The cross-flow fan according to any one of claims 1, 10 and 11, wherein all or part of the fan is formed into an arc and the cross-section of each part overlaps with the same cross-section line.
とし、他端を前記一端を基準に長手方向に幅を変化さ
せ、長手方向に垂直な断面は少なくとも一部または全部
を円弧とし、各部所の断面が同一な断面ラインに重なる
ごとく形成し、羽根断面の羽根車外周寄りの円弧は弦長
が大なる部分ほどその断面円弧半径を大きく形成したこ
とを特徴とする請求項17記載の貫流ファン。18. One end in the width direction of the blade is linear in the longitudinal direction, the other end is varied in width in the longitudinal direction with reference to the one end, and a cross section perpendicular to the longitudinal direction is an arc at least partially or entirely. The cross section of each part is formed so as to overlap with the same cross section line, and the arc of the cross section of the impeller near the outer circumference of the impeller has a larger arc radius as the chord length increases. Once-through fan.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP08054663A JP3137897B2 (en) | 1996-03-12 | 1996-03-12 | Once-through fan |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP08054663A JP3137897B2 (en) | 1996-03-12 | 1996-03-12 | Once-through fan |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH09250493A true JPH09250493A (en) | 1997-09-22 |
JP3137897B2 JP3137897B2 (en) | 2001-02-26 |
Family
ID=12977036
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP08054663A Expired - Lifetime JP3137897B2 (en) | 1996-03-12 | 1996-03-12 | Once-through fan |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3137897B2 (en) |
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JP2006152886A (en) * | 2004-11-26 | 2006-06-15 | Toshiba Kyaria Kk | Cross-flow fan, and indoor unit of air conditioner |
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