JP3077863B2 - Propeller fan and air conditioner equipped with the same - Google Patents

Propeller fan and air conditioner equipped with the same

Info

Publication number
JP3077863B2
JP3077863B2 JP05099011A JP9901193A JP3077863B2 JP 3077863 B2 JP3077863 B2 JP 3077863B2 JP 05099011 A JP05099011 A JP 05099011A JP 9901193 A JP9901193 A JP 9901193A JP 3077863 B2 JP3077863 B2 JP 3077863B2
Authority
JP
Japan
Prior art keywords
trailing edge
wing
leading edge
blade
propeller fan
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP05099011A
Other languages
Japanese (ja)
Other versions
JPH06307397A (en
Inventor
洋治 関根
隆 早乙女
芳廣 高田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP05099011A priority Critical patent/JP3077863B2/en
Publication of JPH06307397A publication Critical patent/JPH06307397A/en
Application granted granted Critical
Publication of JP3077863B2 publication Critical patent/JP3077863B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Other Air-Conditioning Systems (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【産業上の利用分野】本発明はプロペラファンおよびこ
れを備えた空気調和機に係り、特に低騒音が得られ成形
も容易で、これを用いた製品の省資源化に貢献する構造
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a propeller fan and an air conditioner provided with the same, and more particularly to a structure that can produce low noise, is easy to mold, and contributes to resource saving of products using the same. is there.

【０００２】[0002]

【従来の技術】従来のプロペラファンは、例えば、特公
昭６２−５２１６０号公報記載のように、翼の後縁と隣
接する翼の前縁との間に距離が置かれているもの、ある
いは重合されているものが知られていた。また、例え
ば、実公昭５５−４８７９６号公報記載のように、翼の
マウスリングに対向する部分の径を局部的に小さく形成
する構造が知られていた。2. Description of the Related Art Conventional propeller fans are, for example, those in which a distance is provided between a trailing edge of a blade and a leading edge of an adjacent blade as described in Japanese Patent Publication No. 52160/1987, or a polymerized fan. What was known was. In addition, for example, as described in Japanese Utility Model Publication No. 55-48796, a structure in which the diameter of a portion of a wing facing a mouth ring is locally reduced is known.

【０００３】[0003]

【発明が解決しようとする課題】上記従来技術の前者に
おいては、隣接翼との間に距離がある場合には所定の風
圧を翼の傾斜で稼ぐこととなり、重合している場合には
成形型が複雑になるなど、騒音と成形の両者を配慮する
点が不足していた。また後者は、翼の半径方向にできる
翼端渦とマウスリング間の乱れの発生を防止する点につ
いて充分に配慮されていなかった。In the former of the above prior art, when there is a distance between adjacent wings, a predetermined wind pressure is obtained by the inclination of the wings. However, there was a lack of consideration for both noise and molding, such as the complexity of molding. In the latter, sufficient consideration was not given to preventing the occurrence of turbulence between the wing tip vortex and the mouth ring formed in the radial direction of the wing.

【０００４】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、翼前縁からの風の取り込みを
スムーズにし、所定の圧力を翼幅を重合させない方法で
大きくすることにより低騒音で製造作業性も良いプロペ
ラファンを提供するとともに、前縁先端の平面形状を従
来以上に先細化することにより低騒音をさらに進めるこ
とを第一の目的とするものである。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and is intended to smooth the intake of wind from the leading edge of a blade and to increase a predetermined pressure by a method that does not allow the blade width to overlap. It is a first object of the present invention to provide a propeller fan with low noise and good manufacturing workability, and to further promote low noise by tapering the planar shape of the leading edge more than before.

【０００５】また、本発明の第二の目的は、ファンの取
り扱い性を良くするほか、上記プロペラファンを組込品
として用い、製品の低騒音化とコンパクト化を図り、省
資源に貢献する空気調和機を提供することにある。A second object of the present invention is to improve the handleability of the fan and to reduce noise and size of the product by using the propeller fan as a built-in product, thereby contributing to resource saving. To provide a harmony machine.

【０００６】[0006]

【課題を解決するための手段】上記第一の目的を達成す
るために、本発明に係るプロペラファンの構成は、翼の
前縁の半径方向外方先端部を、回転方向に先行する翼の
後縁に対して回転方向に重合させることなく該後縁の半
径方向外方近傍のラインにほぼ沿わせて該半径方向外方
近傍よりも回転方向に先行する外方に至り、前縁側のフ
ァン外径を後縁側のファン外径よりも次第にあるいは途
中から大きくして、翼を半径方向にずらして翼幅を大に
し、前縁の外径方向外方先端部寄りの平面形状を先細に
したものである。In order to achieve the first object, the structure of the propeller fan according to the present invention is such that the radially outer tip of the leading edge of the blade is attached to the leading edge of the blade in the rotational direction. The fan on the leading edge side extends almost along the line near the radially outer side of the trailing edge without overlapping in the rotating direction with respect to the trailing edge, leading to the outer side preceding the radially outer portion in the rotating direction. The outer diameter was increased gradually or partway from the outer diameter of the fan on the trailing edge, the blades were shifted in the radial direction to increase the blade width, and the flat shape near the outer radial tip of the leading edge was tapered. Things.

【０００７】より詳しくは、翼の後縁部に回転軸に対し
て少なくともほぼ直角な直線的部分を有する最後縁ライ
ンを形成し、その翼の後縁部の最後縁ラインが平面形状
ではほぼ直線部を形成するものである。また、翼車全体
を軸方向から見た平面形状では、隣接翼との重合部分を
無くし、翼間を最小限に近接させて翼面積を大きく形成
したものである。More specifically, a trailing edge line having a linear portion at least substantially perpendicular to the rotation axis is formed at the trailing edge of the wing, and the trailing edge line of the trailing edge of the wing is substantially straight in a planar shape. It forms a part. Further, in the planar shape of the entire impeller viewed from the axial direction, the overlapped portion with the adjacent blades is eliminated, and the blade area is formed to be large by minimizing the space between the blades.

【０００８】また、上記第二の目的を達成するために、
本発明に係る空気調和機の構成は、回転方向に先行する
翼に対して半径方向にずらして翼幅を大にし、前縁の平
面形状を先細に形成したプロペラファンを用い、翼の後
縁寄りの半径方向外方を囲むマウスリング、翼の前縁側
に熱交換器、後縁側にガードを、それぞれ配設したもの
である。In order to achieve the second object,
The configuration of the air conditioner according to the present invention uses a propeller fan in which the width of the blade is increased by shifting in the radial direction with respect to the blade leading in the rotation direction, and the plane shape of the leading edge is tapered, and the trailing edge of the blade is used. It has a mouth ring that surrounds the radially outer side, a heat exchanger on the leading edge side of the wing, and a guard on the trailing edge side.

【０００９】また、回転方向に先行する翼に対して半径
方向にずらして翼幅を大にし、前縁の平面形状を先細に
形成し、翼の後縁部に回転軸に対して少なくともほぼ直
角な直線的部分を有する最後縁ラインを形成したプロペ
ラファンを用い、翼の後縁寄りの半径方向外方を囲むマ
ウスリング、翼の前縁側に熱交換器、後縁側にガード
を、それぞれ配設したものである。さらに、マウスリン
グに収納された部分の後縁側ファン外径に対して前縁側
のファン外径をマウスリングの流入第１開口部径以内に
大きくしたものである。In addition, the blade width which is shifted in the radial direction with respect to the blade leading in the rotation direction is increased, the plane shape of the leading edge is tapered, and the trailing edge of the blade is at least substantially perpendicular to the rotation axis. Using a propeller fan that forms a trailing edge line with a straight line portion, a mouth ring that surrounds the outside in the radial direction near the trailing edge of the wing, a heat exchanger on the leading edge side of the wing, and a guard on the trailing edge side It was done. Furthermore, the outer diameter of the front edge side fan is larger than the outer diameter of the rear edge side fan accommodated in the mouth ring within the diameter of the inflow first opening of the mouth ring.

【００１０】[0010]

【作用】上記各技術的手段による働きは次のとおりであ
る。すなわち、翼幅の増加は、同一傾斜の場合には揚力
がアップするので、本発明では傾斜を小にして揚力係数
を小にできることと、翼面上における前縁から後縁に至
る圧力変化率をゆるやかにできるものである。また、隣
接翼との重合が無いので翼干渉がなくなり翼間通路も広
くとれるばかりか、前縁先端の先細化が従来以上に行な
われることにより、風の流入がスムーズとなり、合わせ
て隣接翼の後縁からの半径方向外方位置にて広くした分
の翼面積増加と、これにより半径方向内側においても翼
面積増加が可能となる。これらのことから騒音の低いプ
ロペラファンが得られる。The function of each of the above technical means is as follows. In other words, the increase in the blade width increases the lift in the case of the same inclination. Therefore, in the present invention, the inclination can be reduced to reduce the lift coefficient, and the pressure change rate from the leading edge to the trailing edge on the blade surface can be reduced. Can be relaxed. In addition, since there is no overlap with the adjacent wings, not only the wing interference does not occur and the passage between the wings can be widened, but also because the leading edge tip is tapered more than before, the flow of wind becomes smoother, The increased blade area at the radially outward position from the trailing edge and the increased radially inner blade area are also possible. From these facts, a low-noise propeller fan can be obtained.

【００１１】また、翼は軸方向から見て重合しない形状
が得られることとなって、樹脂成形も２分割型により容
易に行なえることになる。金属によりプレス製法で行う
場合も同様である。また、後縁に直線的部分を形成して
いるので床置き性が良好になるほか、破損防止にも有効
となる。In addition, the blade has a shape that does not overlap when viewed from the axial direction, so that resin molding can be easily performed by the two-piece mold. The same applies to the case where the pressing is performed using a metal. In addition, since a linear portion is formed at the trailing edge, the floor can be easily placed on the floor, and it is also effective in preventing breakage.

【００１２】さらに、上記プロペラファンを空気調和機
に用いる場合に、前縁のファン外径を大きくしてあるの
で幅広く吸い込み作用が行なわれるほか、前記前縁側の
ファン外径をマウスリングの流入第１開口部径以内で大
きくすることにより、マウスリング開口部縁と熱交換器
あるいはユニットケース間のスペースを有効活用できる
ほか、直線的最後縁ラインをガード面とほぼ平行にする
ことにより翼面積を有効にアップできる。また、風量ア
ップができるので、その分機器のコンパクト化が実現し
省資源化に貢献できる。Furthermore, when the propeller fan is used in an air conditioner, the fan outer diameter at the front edge is enlarged, so that the suction operation is performed widely, and the fan outer diameter at the front edge side is determined by the inlet diameter of the mouth ring. By increasing the diameter within one opening diameter, the space between the mouth ring opening edge and the heat exchanger or unit case can be effectively used, and the wing area can be reduced by making the straight trailing edge line almost parallel to the guard surface. Can be effectively up. In addition, since the air volume can be increased, the size of the equipment can be reduced, which contributes to resource saving.

【００１３】[0013]

【実施例】以下、本発明の各実施例を図１ないし図３を
参照して説明する。まず、プロペラファンの一実施例を
図１，図２を参照して説明する。 〔実施例 １〕図１は、本発明の一実施例に係るプロペ
ラファンの平面図、図２は、図１のプロペラファンの回
転断面図である。図１、図２において、１はハブであっ
て、その外周に同一形状の４枚の翼２が等ピッチに樹脂
製で一体に成形してある。２ａは風の入口側となる前
縁、２ｂは風の出口側となる後縁である。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS. First, an embodiment of a propeller fan will be described with reference to FIGS. [Embodiment 1] FIG. 1 is a plan view of a propeller fan according to an embodiment of the present invention, and FIG. 2 is a rotational sectional view of the propeller fan of FIG. In FIGS. 1 and 2, reference numeral 1 denotes a hub, and four blades 2 of the same shape are integrally formed of resin at an equal pitch on the outer periphery thereof. 2a is a leading edge on the wind inlet side, and 2b is a trailing edge on the wind outlet side.

【００１４】２ｂ2は最後縁ラインであって、平面形状
でほぼ直線部を形成し、かつ回転軸３に対してもほぼ直
角な直線部を形成している。前記前縁２ａの半径方向外
方近傍の先端部２ａ1は、回転方向Ｎに先行する翼の後
縁２ｂに対して回転方向に重合させることなく、該後縁
２ｂの半径方向外方近傍（コーナ部）２ｂ1の曲線にほ
ぼ沿って該半径方向外方近傍２ｂ1よりも回転方向に先
行する外方に至り、前縁２ａ側のファン径Ｄａを後縁側
のファン外径Ｄｂよりも途中から次第に大きくして、先
行する翼に対して半径方向にずらした形に翼幅を大に
し、前縁２ａの半径方向外方寄り（先端部２ａ1寄り）
の平面形状を先細に形成している。Reference numeral 2b 2 denotes a trailing edge line, which forms a substantially straight portion in a planar shape and also forms a straight portion substantially perpendicular to the rotating shaft 3. The tip portion 2a 1 near the radially outer side of the leading edge 2a does not overlap in the rotational direction with the trailing edge 2b of the wing preceding the rotating direction N, and the radially outward portion of the trailing edge 2b ( substantially along the curve of the corner portion) 2b 1 reaches outwardly preceding in the rotational direction than the radially outward vicinity 2b 1, the front edge 2a of the trailing edge of the fan diameter Da fan outer diameter middle than Db gradually increased from the preceding wingspan large to form shifted radially relative to the wing west, radially outward side of the front edge 2a (tip 2a 1 close)
Is formed in a tapered shape.

【００１５】また、翼車全体的には、平面図において、
軸方向から見た場合に隣接翼との重合部分を無くし、か
つ隣接翼間を最小限に近接させて翼面積を大にしてある
ほか、前記最後縁ライン２ｂ2の回転軸３に対するほぼ
直角な直線部の構成は、翼２の半径方向内方の幅（弦
長）が小となるので、傾斜角を大にすることより得てい
る。[0015] In addition, in the overall plan view,
When viewed from the axial direction, the overlapped portion with the adjacent blades is eliminated, and the area between adjacent blades is minimized to increase the blade area, and the trailing edge line 2b 2 is substantially perpendicular to the rotation axis 3. Since the width (chord length) of the blade 2 in the radial direction is small, the straight portion is obtained by increasing the inclination angle.

【００１６】上記の如く構成したプロペラファンにおい
ては、翼幅が大きいので、翼２の傾斜角が同一である場
合には風量，風圧が大となり、一方、騒音は前縁２ａか
ら後縁２ｂまでの広い領域で揚力を稼げばよいことにな
り、負圧面および正圧面の圧力勾配がゆるやかとなって
騒音が低下する。また、風の入口になる前縁２ａが先行
する翼の後縁２ｂと回転方向に重合すること無く、しか
も前縁２ａの半径方向外方先端部２ａ1は先行する後縁
２ａとは半径方向にずれているので、先行する翼による
乱れの干渉を受けること無く効率的に空気を流入させる
ことができ、通常翼の幅を広くする場合に比較して風量
増加による騒音アップを少なくできる。In the propeller fan configured as described above, since the blade width is large, when the inclination angle of the blade 2 is the same, the air volume and the wind pressure are large, while noise is generated from the front edge 2a to the rear edge 2b. In this case, it is only necessary to increase the lift in a wide area, and the pressure gradient on the negative pressure surface and the positive pressure surface becomes gentle and noise is reduced. Also, the leading edge 2a serving as the wind inlet does not overlap with the trailing edge 2b of the preceding wing in the rotational direction, and the radially outer tip 2a 1 of the leading edge 2a is radially different from the leading trailing edge 2a. , The air can efficiently flow in without receiving the interference of the turbulence caused by the preceding blade, and the noise increase due to the increase in the air volume can be reduced as compared with the case where the width of the normal blade is widened.

【００１７】また、前縁２ａ側のファン外径Ｄａを大き
くすることにより、翼部の風の流れは、図１に２点鎖線
で代表部を示すようにａ〜ｂにわたり実質流路距離すな
わち流れに沿う翼幅が大きくなるので、翼面の圧力勾配
が直線状に測定した翼幅増加時以上にゆるやかとなって
騒音が低下する。Further, by increasing the fan outer diameter Da on the leading edge 2a side, the flow of wind at the wing portion is substantially equal to the actual flow path distance, ie, a to b, as shown by a two-dot chain line in FIG. As the blade width along the flow increases, the pressure gradient on the blade surface becomes gentler than when the blade width increases linearly measured, and the noise decreases.

【００１８】また、風の取り込みに関しては、前縁の半
径方向外方先端部２ａ1近傍の平面形状を、前縁側のフ
ァン外径Ｄａの増加により先行する後縁２ｂとは半径方
向外方にずらしてあるので、容易に先細形が得られ、か
つ流入方向に向かう斜め外方向きとなるために、半径方
向からの流入を含め風の流入をスムーズに行い得ること
となり、騒音を低減でき、風量も増加できる。Further, with respect to the wind uptake, before the radially outward tip portion 2a 1 near the planar shape of the edge radially outwardly from the rear edge 2b that preceded by an increase in the front edge of the fan outer diameter Da Since it is shifted, the tapered shape can be easily obtained, and since it becomes obliquely outward toward the inflow direction, it is possible to smoothly flow in the wind including inflow from the radial direction, and it is possible to reduce noise, The air volume can also be increased.

【００１９】さらに、最後縁ライン２ｂ2の回転軸３に
ほぼ直角なほぼ直線部の構成は、ファン単品の床上や作
業台上の取り扱いの際に後縁２ｂ側を下方にして置きや
すくして作業性を良くし、先細なる前縁２ａ側を上方に
して破損や変形させることのないよう充分に配慮された
形状となっている。後述するが組込品として用いる場合
にはユニットを薄形にするなど省資源化に貢献できるも
のである。Further, the configuration of the substantially straight portion substantially perpendicular to the rotation axis 3 of the rear edge line 2b 2 makes it easy to place the rear edge 2b side downward when handling the fan alone on the floor or a work table. The shape is such that workability is improved and the tapered front edge 2a is directed upward so as not to be damaged or deformed. As will be described later, when used as a built-in product, the unit can be made thin to contribute to resource saving.

【００２０】また、このような場合、従来のように、各
翼の外周縁部を同芯上にしたもので前記のような先細な
前縁形状を得るには、先細部形成を、先行する翼の後縁
２ｂをカットするか、後縁２ｂをカットしないで先細部
より内方の前縁２ａをカットして、すなわち翼幅を小に
しなければならなかった。しかし、本実施例において
は、前縁２ａと先行する翼の後縁２ｂの位置をずらして
いるので作業性が向上し、翼２の変形防止効果が得ら
れ、翼幅も有効に増加できるものである。In such a case, as in the prior art, in order to obtain the above-mentioned tapered leading edge shape by forming the outer peripheral edge of each blade concentrically, it is necessary to form the tapered portion first. The trailing edge 2b of the wing must be cut, or the leading edge 2a inside the tapered portion must be cut without cutting the trailing edge 2b, that is, the wing width must be reduced. However, in the present embodiment, since the positions of the leading edge 2a and the trailing edge 2b of the preceding wing are shifted, workability is improved, the effect of preventing deformation of the wing 2 is obtained, and the wing width can be effectively increased. It is.

【００２１】なお、後縁側の外径Ｄｂを拡大したらどう
かとの考えもあるが、この場合には、周囲から縮流形態
で流入された流れを外形Ｄｂの範囲に急激に拡大するこ
とが困難であることと流入空気のスムーズ化が得られな
いため騒音低減の効果は少なく、組込品として用いる場
合には、マウスリングが大きくなり、したがって製品の
外形寸法も大きくなる問題がある。本実施例ではこのよ
うな問題を解決するものである。There is a possibility that the outer diameter Db on the trailing edge side may be increased, but in this case, it is difficult to rapidly expand the flow that has flowed in from the surroundings in the form of a contracted flow into the range of the outer shape Db. In addition, since smoothing of the inflowing air cannot be obtained, the effect of noise reduction is small, and when used as a built-in product, there is a problem that the mouth ring becomes large, and thus the external dimensions of the product also become large. In the present embodiment, such a problem is solved.

【００２２】次に、このようなプロペラファンを空気調
和機に適用した場合の実施例を説明する。 〔実施例 ２〕図３は、図１のプロペラファンをルーム
エアコンの室外ユニットに用いた一実施例を示す空気調
和機の縦断面図である。ここで、ファン形状は回転断面
図を示すものである。図１と同一符号のものは同一部分
を示す。Next, an embodiment in which such a propeller fan is applied to an air conditioner will be described. Embodiment 2 FIG. 3 is a longitudinal sectional view of an air conditioner showing an embodiment in which the propeller fan of FIG. 1 is used for an outdoor unit of a room air conditioner. Here, the fan shape shows a rotation cross-sectional view. 1 have the same reference numerals as in FIG.

【００２３】図３において、４はファンモータであって
ハブ１の中央に直結して翼車を回転可能にしてある。５
はマウスリングで、このマウスリング５は、翼の後縁２
ｂからの半径方向外方周囲をわずかな距離を置いて囲み
圧力仕切り作用をするものであり、ベル状の始点部すな
わち流入第１開口部５ａと始点部の第２開口部５ｂと逆
流防止の第３開口部５ｃとを性能主要部としている。第
３開口部５ｃは第２開口部５ｂに対して口径を大きく
し、吐出方向に長くずらしてある。翼の前縁側の外径Ｄ
ａは上記流入第１開口部５ａの径Ｍ1と同等以内にして
ある。In FIG. 3, reference numeral 4 denotes a fan motor which is directly connected to the center of the hub 1 so as to rotate the impeller. 5
Is a mouth ring, and this mouth ring 5 is a trailing edge 2 of the wing.
The outer periphery in the radial direction from b is separated by a small distance, and acts as a pressure partition. The bell-shaped starting point, that is, the inflow first opening 5a and the second opening 5b at the starting point, are used to prevent backflow. The third opening 5c and the performance main part are used. The third opening 5c has a larger diameter than the second opening 5b and is shifted longer in the ejection direction. Outer diameter D on the leading edge side of the wing
a is set to be equal to or less than the diameter M1 of the first inflow opening 5a.

【００２４】６は熱交換器で、この熱交換器６は、全体
をＬ型に曲げ風をファンの半径方向からも導入可能に
し、前記翼の前縁２ａ側に配設してある。７はガード
で、このガード７は、前記翼の後縁２ｂに対向し、指を
挿入するなどの危険防止のために所定のピッチの丸鋼製
で、ユニットの最外側から翼の最後縁ライン２ｂ2と所
定の距離を確保している。８はユニット、８ａはベー
ス、Ｅ、Ｆ、Ｇは風の代表的な流れ方向を示すものであ
る。Reference numeral 6 denotes a heat exchanger. The heat exchanger 6 is bent in an L-shape so that wind can be introduced from the radial direction of the fan, and is disposed on the leading edge 2a side of the blade. Reference numeral 7 denotes a guard, which is opposed to the trailing edge 2b of the wing. The guard 7 is made of round steel having a predetermined pitch in order to prevent danger such as insertion of a finger. 2b 2 and a predetermined distance are secured. Reference numeral 8 denotes a unit, 8a denotes a base, and E, F, and G indicate typical flow directions of wind.

【００２５】プロペラファンを上記構成の如く配置して
用いることにより、空気調和機としては従来通りプロペ
ラファンを回転させることにより熱交換器６の前面から
空気を吸い込み、熱交換された空気をガード７側から送
り出す。この場合、本実施例においては、翼の前縁２ａ
を半径方向外方に向けて外径Ｄａを大にし、先行する翼
の後縁２ｂに対し、半径方向外方にずらして翼幅を増
し、平面形を先細に形成しているので、プロペラファン
単品の場合に述べたと同様に風量を増加でき騒音も低減
できる。特に空気調和機の場合には、熱交換器６全体か
ら空気を流入させることが重要であるが、この場合に前
縁２ａは熱交換器６の側方６ａ側に向かっているので流
線Ｅのように広い領域から効果的な流入を行なうことが
できて風量が増加するので、熱交換能力の向上と併せて
前縁２ａの流入もスムーズとなり騒音が低減できる効果
がある。By arranging and using a propeller fan as described above, the air conditioner sucks air from the front of the heat exchanger 6 by rotating the propeller fan as in the conventional air conditioner, and protects the heat-exchanged air from the guard 7. Send out from the side. In this case, in this embodiment, the leading edge 2a of the wing
Is made radially outward to increase the outer diameter Da, and is shifted radially outward with respect to the trailing edge 2b of the preceding blade to increase the blade width, so that the flat shape is tapered. As described above, the air volume can be increased and the noise can be reduced as described above. In particular, in the case of an air conditioner, it is important to allow air to flow in from the entire heat exchanger 6, but in this case, since the leading edge 2a faces the side 6a of the heat exchanger 6, the streamline E As described above, the effective inflow can be performed from a wide area and the air volume increases, so that in addition to the improvement of the heat exchange capacity, the inflow of the leading edge 2a becomes smooth and the noise can be reduced.

【００２６】また、前縁側の外径Ｄａを翼の外周から熱
交換機の側方６ａ、あるいは、ユニット８のベース８ａ
までの間のスペースを利用して大きくしてあるので、従
来以上にユニットを大にするようなことは無く、反対に
風量が増加する分の小形化または低速化により騒音低下
量を増すことができる。さらに、直線的部分を有する最
後縁ライン２ｂ2を設け、これを回転軸３にほぼ直角と
なし、ガード７とほぼ平行にすることにより、翼面積を
最大限に確保し翼２とユニット最外側の安全確保距離を
最小限に確保できユニット厚みの薄形に貢献できる。Further, the outer diameter Da of the leading edge side is changed from the outer periphery of the blade to the side 6a of the heat exchanger or the base 8a of the unit 8.
Because the space between them is increased by using the space between them, there is no need to make the unit larger than before, and conversely, the amount of noise reduction can be increased by reducing the size or lowering the speed as the air flow increases it can. Further, the end edge line 2b 2 has a linear portion provided, which without substantially perpendicular to the rotating shaft 3, by substantially parallel to the guard 7, ensuring wing area to maximize blade 2 and the unit outermost The minimum safety distance can be secured and the unit thickness can be reduced.

【００２７】さらに、マウスリングの第２開口部５ｂの
先端と第３開口部５ｃとの間にできる段差空間５ｄは、
ユニット最外側から負圧部の第２開口部５ｂに向かって
逆流して翼外周渦と干渉するのを段差部５ｄで浮かせ再
吐出させて騒音の発生を未然に防止する役割を果たすも
のである。Further, a step space 5d formed between the tip of the second opening 5b of the mouth ring and the third opening 5c is
The backflow from the outermost part of the unit toward the second opening 5b of the negative pressure part interferes with the outer peripheral vortex. The part is floated at the step part 5d and discharged again to prevent noise from occurring. .

【００２８】なお、前縁２ａ側の外径Ｄａはマウスリン
グ５のベル状部始点部となる第１開口部径Ｍ1以内にと
どめるのが適切である。なぜならば、第１開口部径Ｍ1
を越えて大きくなると、外周にできる翼先端渦がマウス
リング７と干渉して騒音アップを招きはじめ、さらに大
きくなると、外周の一部が後縁の役割を果たして吐出し
てしまい、内部におけるショートサーキット現象を生じ
風量低下と共に騒音アップが著しくなってくる。これに
対し、上記適切範囲にすることによりベル状部への流入
をスムーズにすることができて風量増加と騒音低下を同
時に得ることができる。It should be noted, before the outer diameter Da of the edge 2a side is appropriate to keep the first within opening diameter M 1 to be bell-shaped portion starting point of the mouth ring 5. This is because the first opening diameter M 1
When it becomes larger, the wing tip vortex formed on the outer periphery interferes with the mouth ring 7 and starts to increase noise. When it becomes larger, a part of the outer periphery plays a role of a trailing edge and is discharged. A phenomenon occurs, and the noise rises remarkably as the air volume decreases. On the other hand, by setting it in the above-mentioned appropriate range, it is possible to smoothly flow into the bell-shaped portion, and it is possible to simultaneously increase the air volume and reduce the noise.

【００２９】次に、本実施例の効果を実際の例で述べ
る。プロペラファンを外径３４０ｍｍ、翼数４枚とし、
マウスリング５は図３に示した如く段差空間５ｄ付き
で、第１開口部径Ｍ1が３７９ｍｍ、第２開口部径３５
５ｍｍのものを用いた。改良前の翼弦長（この場合は前
縁の先細部前端と後縁から外周への移動点の２点を直線
弦で結んだ長さを翼幅に代表する）を２５５ｍｍ、前縁
側を後縁側のファン外径と同一とし、翼車厚み１１０ｍ
ｍ（２点間の軸方向距離）になるように傾斜させたもの
におけるファン単独性能は、回転数毎分７４０回転で、
最大効率点の風量１９ｍ3／ｍｉｎ、そのときの全圧は
２７Ｐａで、ファン効率６２％、騒音は３５ｄＢであっ
たのに対し、本実施例の如く翼形状を前縁側のファン外
径を３６５ｍｍ、後縁側のファン外径を３４０ｍｍ、翼
弦長を２９０ｍｍ、翼車厚み１１０ｍｍ（厚みは改良前
と同じで翼弦長が大なので取付け傾斜角は小となる。）
にしたものにおいては、回転数は毎分７５５回転と改良
前よりも若干高速にて改良前と同じ風量１９ｍ3／ｍｉ
ｎ点で、そのときの全圧２７Ｐａが得られ、ファン効率
は６６％に、その比６．５％向上し、騒音は３１．５ｄ
Ｂと３．５ｄＢの低減効果を得たことを確認した。Next, the effect of the present embodiment will be described with an actual example. The propeller fan has an outer diameter of 340mm and four blades.
The mouth ring 5 has a stepped space 5d as shown in FIG. 3, the first opening diameter M 1 is 379 mm, and the second opening diameter 35 is 35 mm.
The thing of 5 mm was used. The chord length before improvement (in this case, the length connecting the two points of the leading edge of the leading edge, the leading edge and the moving point from the trailing edge to the outer periphery, represented by a straight chord is 255 mm), and the leading edge side is the rear. The outer diameter of the fan is the same as that of the edge, and the impeller thickness is 110m
m (the axial distance between two points), the fan alone performance was 740 rpm per minute,
The air volume at the maximum efficiency point was 19 m 3 / min, the total pressure at that time was 27 Pa, the fan efficiency was 62%, and the noise was 35 dB. The outer diameter of the fan on the trailing edge side is 340 mm, the chord length is 290 mm, and the impeller thickness is 110 mm (the thickness is the same as before the improvement and the chord length is large, so the mounting inclination angle is small.)
In this case, the number of revolutions is 755 revolutions per minute, which is slightly higher than before the improvement, and the same air volume of 19 m 3 / mi as before the improvement.
At point n, a total pressure of 27 Pa at that time was obtained, the fan efficiency was increased to 66%, a 6.5% improvement, and the noise was 31.5 d.
It was confirmed that B and 3.5 dB reduction effects were obtained.

【００３０】また、これを高さ５７０ｍｍ、幅７００ｍ
ｍ、奥行き２３０ｍｍ、Ｌ形曲げ熱交換器組込のルーム
エアコン用室外ユニットに組み込んで毎分７４０回転で
改良前と比較した結果、同一回転数でも、風量は１９．
５ｍ3／ｍｉｎと２．６％多くなり、騒音は４２ｄＢか
ら３９ｄＢと３ｄＢ低くなることを確認することができ
た。Further, this is 570 mm in height and 700 m in width.
m, depth 230 mm, incorporated in an outdoor unit for a room air conditioner incorporating an L-shaped bending heat exchanger, and compared with before improvement at 740 revolutions per minute.
It was confirmed that the noise was 5 m 3 / min, an increase of 2.6%, and the noise was reduced from 42 dB to 39 dB, that is, 3 dB.

【００３１】本実施例では回転数は改良前と同等もしく
は高めの状況で低騒音になっているが、これは翼幅のア
ップに伴う揚力係数の低下、前縁先細化と後縁との位置
ずれによる翼干渉の減少による流入のスムーズ化の効果
が特徴的に現れたものである。また、同一回転数でも風
量が多くなったのは、吸込側のファン外径が大きく、翼
の前縁が熱交換器の側方に至り広く向いたことにより、
熱交換器部の風速分布が良くなって実質的な通風抵抗を
小さくできたことによるものである。In the present embodiment, the noise is low when the rotation speed is equal to or higher than that before the improvement, but this is because the lift coefficient decreases as the blade width increases, the leading edge becomes narrower, and the position of the trailing edge becomes smaller. The effect of smoothing the inflow due to the reduction of the blade interference due to the displacement is characteristically exhibited. In addition, the reason why the air volume increased even at the same rotation speed was that the outer diameter of the fan on the suction side was large and the leading edge of the blade was widely directed to the side of the heat exchanger,
This is due to the fact that the wind speed distribution of the heat exchanger section was improved and the substantial ventilation resistance could be reduced.

【００３２】[0032]

【発明の効果】以上詳細に説明したように、本発明によ
れば、翼前縁からの風の取り込みをスムーズにし、所定
の圧力を翼幅を重合させない方法で大きくすることによ
り低騒音で製造作業性も良いプロペラファンを提供する
とともに、前縁先端の平面形状を従来以上に先細化する
ことにより低騒音をさらに進めることができる。また、
ファンの取り扱い性を良くするほか、上記プロペラファ
ンを組込品として用い、製品の低騒音化とコンパクト化
を図り、省資源に貢献する空気調和機を提供することが
できる。As described above in detail, according to the present invention, the wind is smoothly taken in from the leading edge of the blade, and the predetermined pressure is increased by a method that does not cause the blade width to overlap. Providing a propeller fan with good workability, and further reducing noise by making the planar shape of the leading edge tip tapered more than before. Also,
In addition to improving the handleability of the fan, it is possible to provide an air conditioner that contributes to resource saving by reducing the noise and size of the product by using the propeller fan as a built-in product.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の一実施例に係るプロペラファンの平面
図である。FIG. 1 is a plan view of a propeller fan according to one embodiment of the present invention.

【図２】図１のプロペラファンの回転断面図である。FIG. 2 is a rotation sectional view of the propeller fan of FIG.

【図３】図１のプロペラファンをルームエアコンの室外
ユニットに用いた一実施例を示す空気調和機の縦断面図
である。FIG. 3 is a longitudinal sectional view of an air conditioner showing an embodiment in which the propeller fan of FIG. 1 is used for an outdoor unit of a room air conditioner.

【符号の説明】[Explanation of symbols]

２ 翼 ２ａ 前縁 ２ａ1 前縁の半径方向外方先端部 ２ｂ 後縁 ２ｂ1 後縁の半径方向外方近傍 ５ マウスリング ５ａ 流入第１開口部 Ｍ1 流入第１開口部径 ６ 熱交換器 Ｄａ 前縁側のファン外径 Ｄｂ 後縁側のファン外径2 blade 2a leading edge 2a 1 leading edge of the radially outer tip 2b rear edge 2b 1 trailing edge radially outward near 5 mice ring 5a flows first opening M 1 flows first opening diameter 6 heat exchanger Da Front fan outer diameter Db Rear fan outer diameter

───────────────────────────────────────────────────── フロントページの続き (72)発明者 高田 芳廣 茨城県土浦市神立町502番地 株式会社 日立製作所機械研究所内 (58)調査した分野(Int.Cl.7，ＤＢ名) F04D 29/38 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Yoshihiro Takada 502, Kandachi-cho, Tsuchiura-shi, Ibaraki Machinery Research Laboratory, Hitachi, Ltd. (58) Field surveyed (Int. Cl. 7 , DB name) F04D 29/38

Claims (8)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 翼の前縁の半径方向外方先端部を、回転
方向に先行する翼の後縁に対して回転方向に重合させる
ことなく該後縁の半径方向外方近傍のラインにほぼ沿わ
せて該半径方向外方近傍よりも回転方向に先行する外方
に至り、前縁側のファン外径を後縁側のファン外径より
も次第にあるいは途中から大きくして、翼を半径方向に
ずらして翼幅を大にし、前縁の外径方向外方先端部寄り
の平面形状を先細にしたことを特徴とするプロペラファ
ン。1. A radially outer tip portion of a leading edge of a wing is substantially aligned with a line near a radially outer portion of a trailing edge of the wing without rotatingly superimposing the trailing edge of the trailing edge on the trailing edge. Along the outer side, which is ahead of the vicinity in the radial direction, in the rotational direction, the outer diameter of the fan on the leading edge side is gradually or larger than the outer diameter of the fan on the trailing edge side, and the blades are shifted in the radial direction. The propeller fan is characterized in that the blade width is increased and the plane shape of the leading edge near the radially outer tip is tapered. 【請求項２】 翼の後縁部に回転軸に対して少なくとも
ほぼ直角な直線的部分を有する最後縁ラインを形成した
ことを特徴とする請求項１記載のプロペラファン。2. The propeller fan according to claim 1, wherein a trailing edge line having a linear portion at least substantially perpendicular to the rotation axis is formed at the trailing edge of the blade. 【請求項３】 翼の後縁部の最後縁ラインが、平面形状
ではほぼ直線部を形成することを特徴とする請求項２記
載のプロペラファン。3. The propeller fan according to claim 2, wherein the trailing edge line of the trailing edge of the wing forms a substantially straight portion in a planar shape. 【請求項４】 翼車全体を軸方向から見た平面形状で
は、隣接翼との重合部分を無くし、翼間を最小限に近接
させて翼面積を大きく形成したものであることを特徴と
する請求項１記載のプロペラファン。4. The planar shape of the entire impeller viewed from the axial direction is characterized in that the overlapped portion with adjacent blades is eliminated, and the blade area is increased by minimizing the distance between the blades. The propeller fan according to claim 1. 【請求項５】 回転方向に先行する翼に対して半径方向
にずらして翼幅を大にし、前縁の平面形状を先細に形成
した請求項１記載のプロペラファンを用い、翼の後縁寄
りの半径方向外方を囲むマウスリング、翼の前縁側に熱
交換器、後縁側にガードを、それぞれ配設したことを特
徴とする空気調和機。5. The propeller fan according to claim 1, wherein the blade width is increased by shifting in the radial direction with respect to the blade leading in the rotation direction, and the plane shape of the leading edge is tapered. An air conditioner characterized by having a mouth ring surrounding the outside in the radial direction, a heat exchanger on the leading edge side of the wing, and a guard on the trailing edge side. 【請求項６】 回転方向に先行する翼に対して半径方向
にずらして翼幅を大にし、前縁の平面形状を先細に形成
し、翼の後縁部に回転軸に対して少なくともほぼ直角な
直線的部分を有する最後縁ラインを形成した請求項１な
いし３記載のいずれかのプロペラファンを用い、翼の後
縁寄りの半径方向外方を囲むマウスリング、翼の前縁側
に熱交換器、後縁側にガードを、それぞれ配設したこと
を特徴とする空気調和機。6. The wing width which is shifted in the radial direction with respect to the wing preceding the rotation direction to increase the wing width, the leading edge has a planar shape that is tapered, and the trailing edge of the wing is at least substantially perpendicular to the rotation axis. 4. A mouth ring which surrounds a radially outer portion near a trailing edge of a wing, using a propeller fan according to any one of claims 1 to 3 having a trailing edge line having a straight portion, and a heat exchanger on a leading edge side of the wing. An air conditioner, wherein a guard is provided on a trailing edge side. 【請求項７】 翼の後縁側のガードは、プロペラファン
の後縁部の最後縁ラインにほぼ平行に配設したことを特
徴とする請求項６記載の空気調和機。7. The air conditioner according to claim 6, wherein the guard on the trailing edge side of the wing is disposed substantially parallel to the trailing edge line of the trailing edge of the propeller fan. 【請求項８】 マウスリングに収納された部分の後縁側
のファン外径に対して、前縁側のファン外径をマウスリ
ングのベル状の始点部である流入第１開口部径以内に大
きくしたことを特徴とする請求項５ないし７記載のいず
れかの空気調和機。8. The outer diameter of the fan on the leading edge side is larger than the outer diameter of the fan on the trailing edge side of the portion accommodated in the mouth ring within the diameter of the inflow first opening which is the bell-shaped starting point of the mouth ring. The air conditioner according to any one of claims 5 to 7, wherein:
JP05099011A 1993-04-26 1993-04-26 Propeller fan and air conditioner equipped with the same Expired - Fee Related JP3077863B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP05099011A JP3077863B2 (en) 1993-04-26 1993-04-26 Propeller fan and air conditioner equipped with the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP05099011A JP3077863B2 (en) 1993-04-26 1993-04-26 Propeller fan and air conditioner equipped with the same

Publications (2)

Publication Number Publication Date
JPH06307397A JPH06307397A (en) 1994-11-01
JP3077863B2 true JP3077863B2 (en) 2000-08-21

Family

ID=14235162

Family Applications (1)

Application Number Title Priority Date Filing Date
JP05099011A Expired - Fee Related JP3077863B2 (en) 1993-04-26 1993-04-26 Propeller fan and air conditioner equipped with the same

Country Status (1)

Country Link
JP (1) JP3077863B2 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100412384C (en) 2001-09-03 2008-08-20 松下电器产业株式会社 Fan device, method of manufacturing fan device, projection type display device, and electronic equipment
JP4508975B2 (en) * 2005-08-03 2010-07-21 三菱重工業株式会社 Propeller fan
JP5434235B2 (en) * 2009-04-27 2014-03-05 三洋電機株式会社 Outdoor unit
JP2011226725A (en) * 2010-04-22 2011-11-10 Panasonic Corp Indoor unit of air conditioner
JP2012107538A (en) * 2010-11-16 2012-06-07 Panasonic Corp Axial-flow fan or diagonal-flow fan, and air conditioner mounted outdoor unit with the same
KR20120076039A (en) * 2010-12-29 2012-07-09 엘지전자 주식회사 Axial flow fan and outdoor unit for air conditioner
CN104405679B (en) 2012-04-10 2017-05-10 夏普株式会社 Propeller fan, fluid sending device, and mold for molding
JP6154990B2 (en) * 2012-04-10 2017-06-28 シャープ株式会社 Propeller fan for electric fan, electric fan equipped with the same, and mold for molding propeller fan for electric fan
CN104145120B (en) 2012-04-10 2017-09-01 夏普株式会社 Electric fan propeller type fan and the electric fan for possessing it and the molding die of electric fan propeller type 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
JP2020012462A (en) * 2018-07-09 2020-01-23 パナソニックＩｐマネジメント株式会社 Axial flow fan and outdoor unit for air conditioning device
CN109209996A (en) * 2018-10-24 2019-01-15 美的集团股份有限公司 Axial-flow windwheel, wind wheel component, air-conditioner outdoor unit and air conditioner

Also Published As

Publication number Publication date
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