JPH0968200A - Propeller fan - Google Patents
Propeller fanInfo
- Publication number
- JPH0968200A JPH0968200A JP22093495A JP22093495A JPH0968200A JP H0968200 A JPH0968200 A JP H0968200A JP 22093495 A JP22093495 A JP 22093495A JP 22093495 A JP22093495 A JP 22093495A JP H0968200 A JPH0968200 A JP H0968200A
- Authority
- JP
- Japan
- Prior art keywords
- blade
- propeller fan
- center
- angle
- circumferential direction
- 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、冷蔵庫の機械室内
のコンプレッサーの冷却用等に用いられるプロペラファ
ン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 used for cooling a compressor in a machine room of a refrigerator.
【０００２】[0002]
【従来の技術】プロペラファンは、モータの出力軸等に
固定されるボスの外周に３〜４枚程度の羽根を放射状に
設けて形成される。そして冷蔵庫の機械室内のコンプレ
ッサーの冷却用等に用いられるプロペラファンにあって
は、冷蔵庫が一般家庭の室内で使用されるために、プロ
ペラファンを回転駆動させる際に羽根から発生する騒音
を出来る限り低くすることが必要とされている。2. Description of the Related Art A propeller fan is formed by radially providing about 3 to 4 blades on the outer periphery of a boss fixed to an output shaft of a motor or the like. In the propeller fan used for cooling the compressor in the machine room of the refrigerator, etc. It needs to be lowered.
【０００３】このために、特公昭５９−２２０８０号公
報、特公昭６１−１６３８号公報、特開平５−７９４９
６号公報等において、羽根の形状等の工夫で騒音を低下
する試みが種々なされている。For this reason, Japanese Patent Publication No. 59-2080, Japanese Patent Publication No. 61-1638, and Japanese Patent Laid-Open No. 5-7949.
In the publication No. 6, etc., various attempts have been made to reduce noise by devising the shape of the blades.
【０００４】[0004]
【発明が解決しようとする課題】しかし、これらの試み
は一定の成果を挙げてはいるものの、まだ十分なものと
はいえず、羽根の形状を改良する余地はまだ多く残って
いる。従って本発明が解決しようとする課題は、回転時
の騒音の発生を低減することができるプロペラファンを
提供することである。However, although these attempts have achieved certain results, they are not yet sufficient, and there is still much room for improving the shape of the blade. Therefore, the problem to be solved by the present invention is to provide a propeller fan capable of reducing the generation of noise during rotation.
【０００５】[0005]
【課題を解決するための手段】本発明に係るプロペラフ
ァンは、複数枚の羽根１を放射状に設けて形成されるプ
ロペラファンにおいて、羽根１の付け根部２の円周方向
での中心をＲ1 とし、羽根１の外周部３の円周方向での
中心をＲ2 とし、羽根１の回転中心をＯとしたときに、
ＯとＲ1 を結んだ線とＯとＲ2 を結んだ線との間のなす
角度が１８〜２２°となり、且つＲ1 とＲ2 を結ぶ線Ｐ
が、Ｒ1 を通る回転軸と垂直な面Ｓに対して吸い込み側
に２２〜２７°の角度で傾斜し、且つ羽根１の円周方向
での断面の形状を、羽根断面内に変曲点４を有し、羽根
１の回転方向の前縁から前記変曲点４までの間を吐出側
が凸面となった凸形になり、前記変曲点４から羽根１の
回転方向の後縁までの間を吐出側が凹面となった凹形に
なるように、羽根１を形成して成ることを特徴とするも
のである。The propeller fan according to the present invention is a propeller fan formed by radially providing a plurality of blades 1. In the propeller fan, the center of the root portion 2 of the blade 1 in the circumferential direction is R 1. When the center of the outer peripheral portion 3 of the blade 1 in the circumferential direction is R 2 and the center of rotation of the blade 1 is O,
The angle between the line connecting O and R 1 and the line connecting O and R 2 is 18 to 22 °, and the line P connecting R 1 and R 2
Is inclined at an angle of 22 to 27 ° toward the suction side with respect to the plane S perpendicular to the rotation axis passing through R 1 , and the shape of the cross section of the blade 1 in the circumferential direction has an inflection point within the blade cross section. 4 has a convex shape in which the discharge side has a convex surface between the front edge of the blade 1 in the rotation direction and the inflection point 4, and the discharge side has a convex surface from the inflection point 4 to the rear edge of the blade 1 in the rotation direction. The blade 1 is formed so as to have a concave shape in which the discharge side has a concave surface.
【０００６】[0006]
【発明の実施の形態】以下、本発明の実施の形態を説明
する。図２及び図３は本発明に係るプロペラファンの一
例を示すものであり、円筒形状のボス５の外周に同形状
の３枚の羽根１を等間隔で放射状に設けて形成してあ
り、例えばＡＢＳ樹脂等の一体成形品として作製してあ
る。勿論、羽根１は複数枚であればよく、その枚数は限
定されるものではない。ボス５の中心にはモータの出力
軸等に結合される軸孔８が設けてある。尚、プロペラフ
ァンはｃ矢印方向に回転駆動されるものであり、プロペ
ラファンの回転に伴って空気はイからロ方向へと流れ、
イ側が吸い込み側に、ロ側が吐出側になる。Embodiments of the present invention will be described below. 2 and 3 show an example of a propeller fan according to the present invention, in which three blades 1 of the same shape are radially provided at equal intervals on the outer periphery of a cylindrical boss 5, and for example, It is manufactured as an integrally molded product such as ABS resin. Of course, the number of blades 1 may be plural, and the number is not limited. At the center of the boss 5, a shaft hole 8 that is coupled to the output shaft of the motor or the like is provided. The propeller fan is driven to rotate in the direction of arrow c, and air flows from a to b along with the rotation of the propeller fan.
B side is the suction side and B side is the discharge side.
【０００７】そして図１（ａ）に示すように、羽根１の
付け根部２の円周方向での中心、すなわち羽根１の付け
根部２において回転方向の前縁２ａから後縁２ｂまでの
円周方向に沿った長さの中心をＲ1 とし、羽根１の外周
部３の円周方向での中心、すなわち羽根１の外周部３に
おいて回転方向の前縁３ａから後縁３ｂまでの円周方向
に沿った長さの中心をＲ2 とし、さらに羽根１の回転中
心、すなわちボス５の軸孔８の中心をＯとすると、Ｏと
Ｒ1 を結んだ線とＯとＲ2 を結んだ線との間のなす角度
θ1 が１８〜２２°となるように、羽根１を形成してあ
る。尚、羽根１の外周部３の上記後縁３ｂは、羽根１の
外周部３をその曲率で延長した延長線と、羽根１の回転
方向の後縁１ｂをその曲率で延長した延長線との交点と
して定義されるものである。As shown in FIG. 1 (a), the center of the root portion 2 of the blade 1 in the circumferential direction, that is, the circumference of the root portion 2 of the blade 1 from the front edge 2a to the rear edge 2b in the rotational direction. The center of the length along the direction is R 1, and the center of the outer peripheral portion 3 of the blade 1 in the circumferential direction, that is, the outer peripheral portion 3 of the blade 1 in the circumferential direction from the leading edge 3 a to the trailing edge 3 b in the rotational direction. Let R 2 be the center of the length along the line, and let O be the center of rotation of the blade 1, that is, the center of the shaft hole 8 of the boss 5, and the line connecting O and R 1 and the line connecting O and R 2 . The blades 1 are formed so that the angle θ 1 formed between the blades 1 and 2 is 18 to 22 °. The trailing edge 3b of the outer peripheral portion 3 of the blade 1 is an extension line obtained by extending the outer circumferential portion 3 of the blade 1 with its curvature, and an extension line obtained by extending the trailing edge 1b of the blade 1 in the rotating direction with its curvature. It is defined as the intersection.
【０００８】また図１（ｂ）に示すように、Ｒ1 とＲ2
を結ぶ線をＰとすると、この線Ｐが、羽根１の回転軸Ｌ
と垂直な面のうち、Ｒ1 を通る面Ｓに対して吸い込み側
に傾斜すると共に、面Ｓと線Ｐのなす角度θ2 （面Ｓと
線Ｐの間の最も小さい角度）が２２〜２７°になるよう
に、羽根１を形成してある。さらに図１（ｃ）に示すよ
うに、羽根１の回転円周方向での断面の形状を、羽根１
の断面内に変曲点４を有する略Ｓ字形にし、そして羽根
１の回転方向の前縁１ａから変曲点４までの間を吐出側
が凸面９となった凸形とし、変曲点４から羽根１の回転
方向の後縁１ｂまでの間を吐出側が凹面１０となった凹
形となるように、羽根１を形成してある。尚、羽根１は
その付け根部２から外周部３に至るまでの全長に亘って
この凸形と凹形が形成されるようにしてある。Further, as shown in FIG. 1B, R 1 and R 2
Let P be the line connecting the lines, and this line P is the rotation axis L of the blade 1.
Of the planes that are perpendicular to the plane S passing through R 1 and inclined toward the suction side, and the angle θ 2 between the plane S and the line P (the smallest angle between the plane S and the line P) is 22 to 27. The vane 1 is formed so that the angle becomes 0 °. Further, as shown in FIG. 1C, the shape of the cross section of the blade 1 in the circumferential direction of rotation is changed to the blade 1
Has a substantially S-shape having an inflection point 4 in its cross section, and a portion between the front edge 1a in the rotational direction of the blade 1 and the inflection point 4 is a convex shape having a convex surface 9 on the discharge side. The blade 1 is formed so as to have a concave shape with the concave surface 10 on the discharge side up to the trailing edge 1b in the rotational direction of the blade 1. The blade 1 is formed to have the convex shape and the concave shape over the entire length from the root portion 2 to the outer peripheral portion 3.
【０００９】上記のように、ＯとＲ1 を結んだ線とＯと
Ｒ2 を結んだ線との間のなす角度が１８〜２２°とな
り、且つＲ1 とＲ2 を結ぶ線Ｐが面Ｓに対して吸い込み
側に２２〜２７°の角度で傾斜し、且つ羽根１の断面形
状が前縁１ａから変曲点４までの間を吐出側が凸面９と
なった凸形に、変曲点４から後縁１ｂまでの間を吐出側
が凹面１０となった凹形になるように、羽根１の形状を
設計し、このような形状の羽根１を設けてプロペラファ
ンを作製することによって、プロペラファンの回転時の
羽根１の回転による騒音を低減することができるのであ
る。ＯとＲ1 を結んだ線とＯとＲ2 を結んだ線との間の
なす角度が１８°未満の場合や２２°を超える場合、面
Ｓに対する線Ｐの傾斜角度が２２°未満の場合や２７°
を超える場合、羽根１の断面形状が変曲点を有しない形
状の場合、凹形と凸形が上記の逆の場合には、いずれも
騒音の低減の効果を高く得ることができない。As described above, the angle formed between the line connecting O and R 1 and the line connecting O and R 2 is 18 to 22 °, and the line P connecting R 1 and R 2 is a plane. The blade 1 is inclined at an angle of 22 to 27 ° with respect to S, and the cross-sectional shape of the blade 1 is convex between the front edge 1a and the inflection point 4 and has a convex surface 9 on the discharge side. By designing the shape of the blade 1 so that the discharge side is a concave surface 10 from 4 to the trailing edge 1b, and providing the propeller fan with the blade 1 having such a shape, the propeller fan is manufactured. The noise due to the rotation of the blades 1 when the fan rotates can be reduced. When the angle between the line connecting O and R 1 and the line connecting O and R 2 is less than 18 ° or exceeds 22 °, and the inclination angle of the line P with respect to the surface S is less than 22 ° Or 27 °
If the cross-sectional shape of the blade 1 does not have an inflection point, or if the concave shape and the convex shape are opposite to the above, the effect of reducing noise cannot be obtained.
【００１０】[0010]
【実施例】次に、本発明を実施例によって例証する。 （実施例１）図３に示す寸法（長さの単位はｍｍ）で３
枚羽根のプロペラファンをＡＢＳ樹脂で作製した。そし
てこのプロペラファンにあって、ＯとＲ1 を結んだ線と
ＯとＲ2 を結んだ線との間のなす角度θ1 は１９．５５
°、線Ｐが面Ｓに対してなす角度θ2 は２５．０°であ
り、さらに羽根１の断面形状は前縁１ａから変曲点４ま
での間を吐出側が凸面９となった凸形、変曲点４から後
縁１ｂまでの間を吐出側が凹面１０となった凹形であっ
た。The invention will now be illustrated by the examples. (Embodiment 1) The size shown in FIG. 3 (unit of length is mm) is 3
A single-blade propeller fan was made of ABS resin. In this propeller fan, the angle θ 1 formed between the line connecting O and R 1 and the line connecting O and R 2 is 19.55.
And the angle θ 2 formed by the line P with respect to the surface S is 25.0 °, and the cross-sectional shape of the blade 1 is a convex shape with a convex surface 9 on the discharge side between the front edge 1a and the inflection point 4. The area between the inflection point 4 and the trailing edge 1b was concave with the concave surface 10 on the discharge side.
【００１１】（実施例２）ＯとＲ1 を結んだ線とＯとＲ
2 を結んだ線との間のなす角度θ1 が１８．０°、線Ｐ
が面Ｓに対してなす角度θ2 が２２．０°となるように
羽根１を形成するようにした他は、実施例１と同様な３
枚羽根のプロペラファンをＡＢＳ樹脂で作製した。(Embodiment 2) A line connecting O and R 1 and O and R
The angle θ 1 between the line connecting the two is 18.0 °, and the line P
Is the same as that of the first embodiment except that the blade 1 is formed so that the angle θ 2 formed by the plane S with respect to the surface S is 22.0 °.
A single-blade propeller fan was made of ABS resin.
【００１２】（実施例３）ＯとＲ1 を結んだ線とＯとＲ
2 を結んだ線との間のなす角度θ1 が２２．０°、線Ｐ
が面Ｓに対してなす角度θ2 が２７．０°となるように
羽根１を形成するようにした他は、実施例１と同様な３
枚羽根のプロペラファンをＡＢＳ樹脂で作製した。(Embodiment 3) A line connecting O and R 1 and O and R
The angle θ 1 between the line connecting 2 is 22.0 °, and the line P
Is the same as that of the first embodiment except that the blade 1 is formed so that the angle θ 2 formed by the plane S with respect to the surface S is 27.0 °.
A single-blade propeller fan was made of ABS resin.
【００１３】（比較例１）図４に示す寸法（長さの単位
はｍｍ）で４枚羽根のプロペラファンをＡＢＳ樹脂で作
製した。そしてこのプロペラファンにあって、ＯとＲ1
を結んだ線とＯとＲ2 を結んだ線との間のなす角度θ1
は１４．６°、線Ｐが面Ｓに対してなす角度θ2 は１
８．０°であり、さらに羽根１の断面形状は変曲点がな
く吐出側が全面に亘って凹面となった凹形であった。COMPARATIVE EXAMPLE 1 A four-blade propeller fan having the dimensions shown in FIG. 4 (unit of length is mm) was made of ABS resin. And in this propeller fan, O and R 1
Angle between the line connecting the lines and the line connecting O and R 2 θ 1
Is 14.6 °, and the angle θ 2 formed by the line P with respect to the surface S is 1
It was 8.0 °, and the cross-sectional shape of the blade 1 was concave with no inflection point, and the discharge side was concave over the entire surface.
【００１４】（比較例２）ＯとＲ1 を結んだ線とＯとＲ
2 を結んだ線との間のなす角度θ1 が２４．０°、線Ｐ
が面Ｓに対してなす角度θ2 が２９．０°となるように
羽根１を形成するようにした他は、比較例１と同様な３
枚羽根のプロペラファンをＡＢＳ樹脂で作製した。(Comparative Example 2) A line connecting O and R 1 and O and R
The angle θ 1 with the line connecting 2 is 24.0 °, and the line P
Is the same as Comparative Example 1 except that the blade 1 is formed such that the angle θ 2 formed by the plane S with respect to the surface S is 29.0 °.
A single-blade propeller fan was made of ABS resin.
【００１５】そして上記実施例１乃至３及び比較例１乃
至２のプロペラファンをモータの出力軸に取り付け、１
３００ｒｐｍで回転させたときの騒音及び冷却能力を測
定した。騒音の測定は、プロペラファンＡを図５の冷蔵
庫１１の機械室のモータ１２に取り付け、図６のように
冷蔵庫１０の１ｍ前にマイク１７を置き、プロペラファ
ンＡの回転時の騒音レベルを検出することによって行な
った。また冷却能力の測定は、プロペラファンＡを図５
の冷蔵庫１１の機械室のモータ１２に取り付け、プロペ
ラファンＡを回転させたときのコンプレッサー１４の放
熱量を測定することによって行なった。図５において１
３はコンデンサー、１４はコンプレッサー、１５は蒸発
皿であり、風量計１６が設けてある。プロペラファンＡ
はモータ１２の出力軸１２ａにボス５を結合して取り付
けるようにしてある。Then, the propeller fans of Examples 1 to 3 and Comparative Examples 1 and 2 are attached to the output shaft of the motor.
The noise and cooling capacity when rotating at 300 rpm were measured. To measure the noise, the propeller fan A is attached to the motor 12 in the machine room of the refrigerator 11 in FIG. 5, the microphone 17 is placed 1 m before the refrigerator 10 as shown in FIG. 6, and the noise level when the propeller fan A is rotating is detected. It was done by doing. In addition, the cooling capacity was measured using the propeller fan A as shown in FIG.
It was carried out by measuring the amount of heat radiated by the compressor 14 when the propeller fan A was rotated and attached to the motor 12 in the machine room of the refrigerator 11. In FIG. 5, 1
3 is a condenser, 14 is a compressor, 15 is an evaporating dish, and an air flow meter 16 is provided. Propeller fan A
The boss 5 is connected to and attached to the output shaft 12a of the motor 12.
【００１６】また実施例１及び比較例１のプロペラファ
ンについては、１１００ｒｐｍで回転させたときの騒音
及び冷却能力についても測定した。これらの測定結果を
表１に示す。The propeller fans of Example 1 and Comparative Example 1 were also measured for noise and cooling capacity when rotated at 1100 rpm. The results of these measurements are shown in Table 1.
【００１７】[0017]
【表１】 [Table 1]
【００１８】表１にみられるように、各実施例のもの
は、騒音値が比較例のものよりも大幅に低くなってお
り、騒音が低減されていることが確認される。また放熱
量については各実施例のものは比較例のものと同等のレ
ベルであり、冷却性能が低下することがないことも確認
される。As can be seen from Table 1, the noise value of each of the examples is much lower than that of the comparative example, and it is confirmed that the noise is reduced. In addition, the heat radiation amount of each example is at the same level as that of the comparative example, and it is confirmed that the cooling performance does not deteriorate.
【００１９】[0019]
【発明の効果】上記のように本発明は、形成羽根の付け
根部の円周方向での中心をＲ1 とし、羽根の外周部の円
周方向での中心をＲ2 とし、羽根の回転中心をＯとした
ときに、ＯとＲ1 を結んだ線とＯとＲ2 を結んだ線との
間のなす角度が１８〜２２°となり、且つＲ1 とＲ2 を
結ぶ線Ｐが、Ｒ1 を通る回転軸と垂直な面Ｓに対して吸
い込み側に２２〜２７°の角度で傾斜し、且つ羽根の円
周方向での断面の形状を、羽根断面内に変曲点を有し、
羽根の回転方向の前縁から前記変曲点までの間を吐出側
が凸面となった凸形になり、前記変曲点から羽根の回転
方向の後縁までの間を吐出側が凹面となった凹形になる
ように、羽根を形成したので、プロペラファンの回転時
の羽根の回転による騒音を低減することができるもので
ある。As described above, according to the present invention, the center of the base of the forming blade in the circumferential direction is R 1 , the center of the outer periphery of the blade is R 2 in the circumferential direction, and the center of rotation of the blade is Is O, the angle between the line connecting O and R 1 and the line connecting O and R 2 is 18 to 22 °, and the line P connecting R 1 and R 2 is R 1 is inclined at an angle of 22 to 27 ° to the suction side with respect to a plane S perpendicular to the rotation axis passing through 1 , and has a shape of a cross section of the blade in the circumferential direction, having an inflection point in the blade cross section,
A concave shape in which the discharge side has a convex surface from the front edge in the rotation direction of the blade to the inflection point, and a concave surface on the discharge side from the inflection point to the trailing edge in the rotation direction of the blade. Since the blades are formed so as to be shaped, the noise due to the rotation of the blades when the propeller fan rotates can be reduced.
【図１】本発明のプロペラファン実施形態の一例を示す
ものであり、（ａ）は正面図、（ｂ）は図３（ｂ）のａ
−ａ線切断端面図、（ｃ）は図１（ａ）のｂ−ｂ線切断
端面図である。1A and 1B show an example of a propeller fan embodiment of the present invention, in which FIG. 1A is a front view and FIG. 1B is a in FIG. 3B.
-A line sectional end view, (c) is the bb line sectional end view of Fig.1 (a).
【図２】同上のプロペラファンの斜視図である。FIG. 2 is a perspective view of the above propeller fan.
【図３】同上のプロペラファンを示すものであり（ａ）
は正面図、（ｂ）は側面図，（ｃ）はボスの断面図であ
る。FIG. 3 shows the same propeller fan as above (a).
Is a front view, (b) is a side view, and (c) is a cross-sectional view of the boss.
【図４】従来から使用されているプロペラファンを示す
ものであり、（ａ）は正面図、（ｂ）は側面図である。4A and 4B are views showing a propeller fan that has been conventionally used, in which FIG. 4A is a front view and FIG. 4B is a side view.
【図５】プロペラファンの冷却能力の測定を示す概略図
である。FIG. 5 is a schematic diagram showing measurement of cooling capacity of a propeller fan.
【図６】プロペラファンの騒音の測定を示す概略図であ
る。FIG. 6 is a schematic diagram showing measurement of noise of a propeller fan.
１ 羽根 ２ 付け根部 ３ 外周部 ４ 変曲点 ５ ボス 1 Blade 2 Base part 3 Peripheral part 4 Inflection point 5 Boss
───────────────────────────────────────────────────── フロントページの続き (72)発明者 野田 俊典 大阪府東大阪市高井田本通４丁目２番５号 松下冷機株式会社内 (72)発明者 鈴木 創三 大阪府東大阪市高井田本通４丁目２番５号 松下冷機株式会社内 (72)発明者 浜野 泰樹 大阪府東大阪市高井田本通４丁目２番５号 松下冷機株式会社内 (72)発明者 窪田 吉孝 大阪府東大阪市高井田本通４丁目２番５号 松下冷機株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshinori Noda 4-5 Takaida Hondori, Higashi-Osaka City, Osaka Prefecture Matsushita Refrigerating Machinery Co., Ltd. (72) Inventor Sozo Suzuki 4 Takaidamoto-dori, Higashi-Osaka City, Osaka Prefecture 2-5 Matsushita Refrigerator Co., Ltd. (72) Inventor Yasuki Hamano 4-2-5 Takaida Hondori, Higashi-Osaka City, Osaka Prefecture (2) In Matsushita Refrigerator Co., Ltd. (72) Yoshitaka Kubota Takaidamoto, East Osaka City, Osaka Prefecture 4-4-5 Tsudori Matsushita Cold Machinery Co., Ltd.
Claims (1)
るプロペラファンにおいて、羽根の付け根部の円周方向
での中心をＲ1 とし、羽根の外周部の円周方向での中心
をＲ2 とし、羽根の回転中心をＯとしたときに、ＯとＲ
1 を結んだ線とＯとＲ2 を結んだ線との間のなす角度が
１８〜２２°となり、且つＲ1 とＲ2を結ぶ線Ｐが、Ｒ
1 を通る回転軸と垂直な面Ｓに対して吸い込み側に２２
〜２７°の角度で傾斜し、且つ羽根の円周方向での断面
の形状を、羽根断面内に変曲点を有し、羽根の回転方向
の前縁から前記変曲点までの間を吐出側が凸面となった
凸形になり、前記変曲点から羽根の回転方向の後縁まで
の間を吐出側が凹面となった凹形になるように、羽根を
形成して成ることを特徴とするプロペラファン。1. In a propeller fan formed by radially providing a plurality of blades, the center of the blade root portion in the circumferential direction is R 1, and the center of the outer peripheral portion of the blade is R in the circumferential direction. 2 and O is the center of rotation of the blade, O and R
The angle between the line connecting 1 and the line connecting O and R 2 is 18 to 22 °, and the line P connecting R 1 and R 2 is R
22 on the suction side with respect to the plane S perpendicular to the rotation axis passing through 1
The blade is inclined at an angle of ~ 27 °, and the shape of the cross section of the blade in the circumferential direction has an inflection point in the blade cross section, and discharge is made from the leading edge in the rotation direction of the blade to the inflection point. It is characterized in that the blade is formed in a convex shape whose side is a convex surface, and has a concave shape in which the discharge side is a concave surface between the inflection point and the trailing edge of the blade in the rotation direction. Propeller fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22093495A JP2902577B2 (en) | 1995-08-29 | 1995-08-29 | Propeller fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22093495A JP2902577B2 (en) | 1995-08-29 | 1995-08-29 | Propeller fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0968200A true JPH0968200A (en) | 1997-03-11 |
| JP2902577B2 JP2902577B2 (en) | 1999-06-07 |
Family
ID=16758853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22093495A Expired - Fee Related JP2902577B2 (en) | 1995-08-29 | 1995-08-29 | Propeller fan |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2902577B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005039253A (en) * | 2003-06-30 | 2005-02-10 | Sanyo Denki Co Ltd | Axial fan equipment and heating element cooling device |
| CN100381707C (en) * | 2000-07-04 | 2008-04-16 | 夏普公司 | Propeller fan, propeller molding mold, and fluid feeding device |
| US7742302B2 (en) | 2003-06-30 | 2010-06-22 | Sanyo Denki Co., Ltd. | Axial-flow fan unit and heat-emitting element cooling |
| JP2010150945A (en) * | 2008-12-24 | 2010-07-08 | Toshiba Carrier Corp | Axial fan and outdoor unit for air conditioner |
| WO2011070691A1 (en) * | 2009-12-07 | 2011-06-16 | パナソニック株式会社 | Air blowing device |
| US9097262B2 (en) | 2011-08-19 | 2015-08-04 | Nidec Corporation | Axial flow fan |
-
1995
- 1995-08-29 JP JP22093495A patent/JP2902577B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100381707C (en) * | 2000-07-04 | 2008-04-16 | 夏普公司 | Propeller fan, propeller molding mold, and fluid feeding device |
| JP2005039253A (en) * | 2003-06-30 | 2005-02-10 | Sanyo Denki Co Ltd | Axial fan equipment and heating element cooling device |
| US7742302B2 (en) | 2003-06-30 | 2010-06-22 | Sanyo Denki Co., Ltd. | Axial-flow fan unit and heat-emitting element cooling |
| JP2010226144A (en) * | 2003-06-30 | 2010-10-07 | Sanyo Denki Co Ltd | Heating element cooling device |
| JP4617104B2 (en) * | 2003-06-30 | 2011-01-19 | 山洋電気株式会社 | Axial fan device |
| JP2010150945A (en) * | 2008-12-24 | 2010-07-08 | Toshiba Carrier Corp | Axial fan and outdoor unit for air conditioner |
| WO2011070691A1 (en) * | 2009-12-07 | 2011-06-16 | パナソニック株式会社 | Air blowing device |
| CN102648353A (en) * | 2009-12-07 | 2012-08-22 | 松下电器产业株式会社 | Air blowing device |
| US9097262B2 (en) | 2011-08-19 | 2015-08-04 | Nidec Corporation | Axial flow fan |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2902577B2 (en) | 1999-06-07 |
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