JP4590923B2 - Turbofan and air conditioner using the same - Google Patents

Turbofan and air conditioner using the same Download PDF

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JP4590923B2
JP4590923B2 JP2004138209A JP2004138209A JP4590923B2 JP 4590923 B2 JP4590923 B2 JP 4590923B2 JP 2004138209 A JP2004138209 A JP 2004138209A JP 2004138209 A JP2004138209 A JP 2004138209A JP 4590923 B2 JP4590923 B2 JP 4590923B2
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blade
cross
main plate
camber line
shape
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JP2005320881A (en
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浩一 酒井
欣公 田積
史郎 大谷
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Panasonic Corp
Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Description

本発明は、ターボファン及びそれを用いた空気調和機に関するものである。   The present invention relates to a turbo fan and an air conditioner using the same.

従来のターボファンのブレード形状について図１９から図２２を用いて説明する。図１９は従来のターボファンを搭載した空気調和機の断面図、図２０は、同ターボファンの羽根車の斜視図を、図２１は、同ターボファンの要部拡大断面図を、図２２は、図２１のＮ−Ｎ断面を示すものである。   A blade shape of a conventional turbofan will be described with reference to FIGS. 19 is a cross-sectional view of an air conditioner equipped with a conventional turbofan, FIG. 20 is a perspective view of the impeller of the turbofan, FIG. 21 is an enlarged cross-sectional view of the main part of the turbofan, and FIG. FIG. 22 shows an NN cross section of FIG. 21.

図において、１０はターボファンであり、複数のブレード１１と、各ブレード１１の一端を固定した主板１２と、ブレード１１の他端面に固定され吸い込み部１３ｂを有するシュラウド１３とで構成されている。電動機５はターボファン１０に直結された電動機であり、熱交換器６はターボファン１０の吹出側に配設した略環状の熱交換器であり、ターボファン１０とともにケーシング７内に収納、固定されている。吸い込みリング８はケーシング７に固定された吸い込みリングであり、吸い込みリング８は入口端部８ａから出口端部８ｂにかけて湾曲し、その出口端部８ｂはターボファン１０のシュラウド１３内に挿入されている。１３ｃは、吹き出し部である。   In the figure, reference numeral 10 denotes a turbo fan, which includes a plurality of blades 11, a main plate 12 to which one end of each blade 11 is fixed, and a shroud 13 that is fixed to the other end surface of the blade 11 and has a suction portion 13b. The electric motor 5 is an electric motor directly connected to the turbofan 10, and the heat exchanger 6 is a substantially annular heat exchanger disposed on the blowout side of the turbofan 10, and is housed and fixed in the casing 7 together with the turbofan 10. ing. The suction ring 8 is a suction ring fixed to the casing 7. The suction ring 8 is curved from the inlet end 8 a to the outlet end 8 b, and the outlet end 8 b is inserted into the shroud 13 of the turbofan 10. . 13c is a blowing part.

また、シュラウド１３の吸込み口径Ｄｓは吸い込みリング８の径Ｄｒより大きく設定されており、さらにまた、ブレード１１の上端部をターボファン１０の回転方向に傾斜させている。   The suction port diameter Ds of the shroud 13 is set to be larger than the diameter Dr of the suction ring 8, and the upper end portion of the blade 11 is inclined in the rotational direction of the turbofan 10.

また、ブレード１１のシュラウド１３における側端１３ａでの羽根入口径Ｄｔをシュラウド１３の吸込み口径Ｄｓより大きくすることにより、流入気流がブレード１１の上端部から流入することになり、吸込み口面積が大きいため吸込み気流の速度が低くなり騒音値が低減され、風量全体は向上する。   Further, by making the blade inlet diameter Dt at the side end 13a of the shroud 13 of the blade 11 larger than the suction port diameter Ds of the shroud 13, the inflow airflow flows from the upper end portion of the blade 11, and the suction port area is large. Therefore, the speed of the suction airflow is reduced, the noise value is reduced, and the entire airflow is improved.

ここで、ブレード１１の上端部をターボファン１０の回転方向に傾斜させているので、ブレード１１の上端部が流入気流Ｐを偏向させ、ブレード１１の上端部を傾斜させた部分の羽根負圧面１１ａに気流を導き、さらに下流側のブレード１１の略垂直部分の羽根負圧面１１ｂに安定した気流を案内するため、ブレード１１の羽根負圧面での気流の剥離を抑制する。これによって、乱流騒音の低減と風量性能の向上が図れる（例えば、特許文献１参照）。
特開平１０−１９６５９１号公報 Here, since the upper end portion of the blade 11 is inclined in the rotational direction of the turbofan 10, the upper end portion of the blade 11 deflects the inflow air flow P, and the blade negative pressure surface 11a of the portion where the upper end portion of the blade 11 is inclined. In order to guide the air current to the blade negative pressure surface 11b in the substantially vertical part of the blade 11 on the downstream side, the air flow separation on the blade negative pressure surface of the blade 11 is suppressed. As a result, turbulence noise can be reduced and air flow performance can be improved (see, for example, Patent Document 1).
JP-A-10-196591

しかしながら、前記従来のターボファンの形状では、ブレード１１上部のブレード断面形状（肉厚分布、キャンバーライン等）が規定されていないため、性能特性が不安定になるという課題があった。また、ブレード１１上部の断面形状が、ある断面で大きく変化するため、その領域での流れの乱れが発生して送風性能が劣化するという課題があった。   However, the shape of the conventional turbofan has a problem in that performance characteristics become unstable because the blade cross-sectional shape (thickness distribution, camber line, etc.) at the top of the blade 11 is not defined. Moreover, since the cross-sectional shape of the upper part of the blade 11 changes greatly in a certain cross-section, there is a problem that the turbulence is deteriorated due to flow disturbance in the region.

本発明は、前記従来の課題を解決するもので、ブレード上部での基本断面形状を正確に規定して、風量性能の向上と騒音の低減を図ったターボファンを提供することを目的とする。   SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object of the present invention is to provide a turbo fan in which the basic cross-sectional shape at the upper part of the blade is accurately defined to improve air flow performance and reduce noise.

前記従来の課題を解決する為に、本発明のターボファンは、電動機を覆うと共に前記電動機のシャフトに固定される主板と、吸い込み部と吹き出し部を有するシュラウドと、前記主板と前記シュラウド間に配された複数のブレードとで構成され、前記ブレードの最上部形状を、ある断面でのキャンバーラインを維持して前記ブレードの前縁先端を中心に前記主板の回転方向に連続的に回転させて形成したもので、このキャンバーラインに同一の肉厚を分布させれば、同じ断面形状のブレードとなり、ブレードの基本特性、特に低騒音を維持しながら、ブレード上部の傾斜した領域の負圧面に流れが誘引されるため風量性能が向上する。   In order to solve the above-described conventional problems, a turbofan according to the present invention includes a main plate that covers an electric motor and is fixed to a shaft of the electric motor, a shroud that has a suction portion and a blowing portion, and is disposed between the main plate and the shroud. The uppermost shape of the blade is formed by continuously rotating in the rotation direction of the main plate around the leading edge tip of the blade while maintaining a camber line in a certain cross section. Therefore, if the same wall thickness is distributed in this camber line, the blade will have the same cross-sectional shape, and the flow will flow on the suction surface in the inclined area above the blade while maintaining the basic characteristics of the blade, particularly low noise. The air flow performance is improved because it is attracted.

また、本発明のターボファンは、電動機を覆うと共に前記電動機のシャフトに固定される主板と、吸い込み部と吹き出し部を規定するシュラウドと、前記主板と前記シュラウド間に配された複数のブレードとで構成され、前記ブレードの最上部形状を、ある断面でのキャンバーラインを基準に、そのキャンバーラインの突出方向に連続的にオフセット移動（略同心円方向移動）させて形成したもので、このキャンバーラインに同一の肉厚を分布させれば、同じ断面形状のブレードとなり、入口角及び出口角も大きな変化がないためブレードの基本特性、特に低騒音を維持しながら、吸込み領域の拡大に伴い送風性能の向上が図れる。   The turbofan of the present invention includes a main plate that covers the electric motor and is fixed to the shaft of the electric motor, a shroud that defines a suction portion and a blowing portion, and a plurality of blades disposed between the main plate and the shroud. The uppermost shape of the blade is formed by continuously offset-moving (substantially concentrically moving) in the protruding direction of the camber line on the basis of the camber line in a certain cross section. If the same wall thickness is distributed, the blades have the same cross-sectional shape, and the inlet and outlet angles do not change significantly. Improvement can be achieved.

本発明の空気調和機は、熱交換器と、請求項１〜４のいずれか１項に記載のターボファンを備えたもので、低騒音で、風量性能、熱交換性能に優れた空気調和機を提供する事ができる。 An air conditioner according to the present invention includes a heat exchanger and the turbo fan according to any one of claims 1 to 4 , and is an air conditioner having low noise and excellent air flow performance and heat exchange performance. Can be provided.

本発明のターボファンは、低騒音で、しかも風量性能に優れている。   The turbofan of the present invention has low noise and excellent air volume performance.

第１の発明は、電動機を覆うと共に前記電動機のシャフトに固定される主板と、吸い込み部と吹き出し部を有するシュラウドと、前記主板と前記シュラウド間に配された複数のブレードとで構成し、前記ブレードの最上部形状を、前記ブレードの吹き出し部の最上部位置の断面でのキャンバーラインを維持して前記ブレードの前縁先端を中心に前記主板の回転方向に連続的に回転させて形成したもので、このキャンバーラインに同一の肉厚を分布させれば、同じ断面形状のブレードとなり、ブレードの基本特性、特に低騒音を維持しながら、ブレード上部の傾斜した領域の負圧面に流れが誘引されるため風量性能が向上する。 The first invention is constituted by a main plate which is fixed to the shaft of the motor to cover the electric motor, and a shroud having a balloon portion suction unit, and the main plate and the plurality disposed between the shroud blade, wherein The shape of the uppermost part of the blade is formed by maintaining the camber line in the cross section of the uppermost position of the blowing part of the blade and continuously rotating it in the rotation direction of the main plate around the leading edge tip of the blade If the same wall thickness is distributed in this camber line, the blades have the same cross-sectional shape, and the flow is attracted to the suction surface of the inclined area above the blade while maintaining the basic characteristics of the blade, particularly low noise. Therefore, the air flow performance is improved.

第２の発明は、電動機を覆うと共に前記電動機のシャフトに固定される主板と、吸い込み部と吹き出し部を有するシュラウドと、前記主板と前記シュラウド間に配された複数のブレードとで構成され、前記ブレードの最上部形状を、前記ブレードの吹き出し部の最上部位置の断面でのキャンバーラインを基準に、そのキャンバーラインの突出方向に連続的にオフセット移動（略同心円方向移動）させて形成したもので、このキャンバーラインに同一の肉厚を分布させれば、同じ断面形状のブレードとなり、入口角及び出口角も大きな変化がないためブレードの基本特性、特に低騒音を維持しながら、吸込み領域の拡大に伴い送風性能の向上が図れる。 The second invention is constituted by a main plate which is fixed to the shaft of the motor to cover the electric motor, and shroud have a a balloon portion suction unit, and the main plate and the plurality disposed between the shroud blade, The shape of the uppermost part of the blade is formed by continuously offset-moving (substantially concentrically moving) in the protruding direction of the camber line with reference to the camber line in the cross-section at the uppermost position of the blowing part of the blade If the same wall thickness is distributed in the camber line, the blades have the same cross-sectional shape, and the inlet angle and the outlet angle do not change greatly. Therefore, while maintaining the basic characteristics of the blade, particularly low noise, With the expansion, the air blowing performance can be improved.

第３の発明は、電動機を覆うと共に前記電動機のシャフトに固定される主板と、吸い込み部と吹き出し部を有するシュラウドと、前記主板と前記シュラウド間に配された複数のブレードとで構成し、前記ブレードの最上部形状を、前記ブレードの吹き出し部の最上部位置の断面でのキャンバーラインの先端を基準に相似縮小して、前記相似縮小した断面を、前記ブレードの前縁先端を中心に前記主板の回転方向に連続的に回転させて形成したもので、ブレード上部の傾斜した領域の負圧面に流れ誘引され、風量性能が向上する。また、前縁の稜線が同じ吸込み径で一致するため、吸込みの流れのパターンが安定して低騒音化を図ることができる。 The third invention comprises a main plate that covers the electric motor and is fixed to the shaft of the electric motor, a shroud having a suction portion and a blowing portion, and a plurality of blades disposed between the main plate and the shroud, The shape of the uppermost portion of the blade is similarly reduced with reference to the tip of the camber line at the uppermost cross section of the blowout portion of the blade, and the reduced cross-section is used as the main plate with the front edge of the blade as the center. It is formed by continuously rotating in the direction of rotation of the blade, and is induced to flow to the suction surface of the inclined area above the blade, thereby improving the air flow performance. Further, since the ridge lines of the leading edge coincide with each other with the same suction diameter, the suction flow pattern can be stabilized and the noise can be reduced.

第４の発明は、特に、第１の発明のブレードの最上部形状を、前記ブレードの吹き出し部の最上部位置の断面でのキャンバーラインを維持して、主板の回転方向に連続的に回転させて形成し、前記最上部形状のキャンバーラインが峰部となるように、前記ブレードの圧力面と負圧面を略円弧状又は略楕円状に接続するもので、ブレード全領域において上部からの吸込み流れを円滑にして、ブレードの前縁からの吸込み流れについても円滑に合流できて、大きな乱れもなく送風性能が向上する。 In particular, the fourth aspect of the invention is such that the uppermost shape of the blade of the first invention is continuously rotated in the rotational direction of the main plate while maintaining the camber line in the cross section of the uppermost position of the blowing portion of the blade. The pressure surface and the suction surface of the blade are connected in a substantially arc shape or a substantially elliptic shape so that the top shape camber line becomes a ridge portion. As a result, the suction flow from the leading edge of the blade can be smoothly merged, and air blowing performance is improved without significant disturbance.

第５の発明は、熱交換器と、請求項１〜４のいずれか１項に記載のターボファンを備えたもので、低騒音で、風量性能、熱交換性能に優れた空気調和機を提供する事ができる。 5th invention is provided with the heat exchanger and the turbo fan of any one of Claims 1-4 , and provides the air conditioner excellent in air volume performance and heat exchange performance with low noise. I can do it.

以下、本発明の実施の形態について、図面を参照しながら説明する。なお、この実施の形態によって本発明が限定されるものではない。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

（実施の形態１）
図１は、本発明の第１の実施の形態におけるターボファンの要部断面図、図２は、図１のＡ−Ａ断面図、図３は、図１のＢ−Ｂ断面図である。なお、従来例と同一部分は、同一符号を付してその説明を省略する。 (Embodiment 1)
FIG. 1 is a cross-sectional view of a main part of a turbofan according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. In addition, the same part as a prior art example attaches the same code | symbol, and abbreviate | omits the description.

図において、ブレード１１は、その前縁先端（リーディング・エッジ）ＬＰを中心に、最上部形状（図３、Ｂ−Ｂ断面図）は、ターボファン１０の回転方向にキャンバーライン（反り線）を回転させた形状となる。すなわち、ブレード１１の形状は、図２（Ａ−Ａ断面、すなわちブレードの吹き出し部の最上部位置の断面）から図３（Ｂ−Ｂ断面）に向けて徐々に変化して最上部の形状を規定して、キャンバーラインの形状を維持するものである。 In the drawing, the blade 11 is centered on the leading edge (leading edge) LP of the blade 11, and the uppermost shape (FIG. 3, BB sectional view) has a camber line (warp line) in the rotation direction of the turbofan 10. The shape is rotated. That is, the shape of the blade 11 gradually changes from FIG. 2 (AA cross section , that is, the cross section of the uppermost position of the blowing portion of the blade ) to FIG. 3 (BB cross section) to change the shape of the uppermost portion. It prescribes and maintains the shape of the camber line.

このキャンバーラインに同一の肉厚を分布させれば、同じ断面形状のブレード１１となる。この形状であればブレード１１の基本特性、特に低騒音を維持しながら、ブレード１１上部の傾斜した領域の負圧面に流れが誘引されるため風量性能が向上する。   If the same wall thickness is distributed in the camber line, the blade 11 has the same cross-sectional shape. With this shape, the air flow performance is improved because the flow is attracted to the suction surface of the inclined region of the upper portion of the blade 11 while maintaining the basic characteristics of the blade 11, particularly low noise.

（実施の形態２）
図４は、本発明の第２の実施の形態におけるターボファンの要部断面図、図５は、図４のＣ−Ｃ断面図、図６は、図４のＤ−Ｄ断面図である。なお、従来例と同一部分は、同一符号を付してその説明を省略する。 (Embodiment 2)
4 is a cross-sectional view of the main part of the turbofan according to the second embodiment of the present invention, FIG. 5 is a cross-sectional view taken along the line CC in FIG. 4, and FIG. 6 is a cross-sectional view taken along the line DD in FIG. In addition, the same part as a prior art example attaches | subjects the same code | symbol, and abbreviate | omits the description.

ブレード１１の上部において、ブレードの吹き出し部の最上部位置の断面であるＣ−Ｃ断面（図５）でのキャンバーラインを基準に、キャンバーラインの突出方向にオフセット移動させてブレード１１の最上部形状として連続して形成してターボファン１０を形成したものである。 In the upper part of the blade 11, the shape of the uppermost part of the blade 11 is offset by moving in the protruding direction of the camber line with reference to the camber line in the CC cross section (FIG. 5) which is a cross section of the uppermost position of the blowing part of the blade . Are formed continuously to form the turbo fan 10.

このキャンバーラインに同一の肉厚を分布させれば、同じ断面形状のブレード１１となり、入口角及び出口角も大きな変化がないためブレードの基本特性、特に低騒音を維持しながら、吸込み領域の拡大に伴う送風性能の向上が図れる。すなわち、ブレード１１の最上部の内径Ｄｕｉは、Ｄ１より大きくなり吸込み領域の拡大に起因する。   If the same wall thickness is distributed in the camber line, the blade 11 has the same cross-sectional shape, and the inlet angle and the outlet angle do not change greatly. Therefore, the basic characteristics of the blade, particularly low noise, are maintained, and the suction area is expanded. The improvement of the ventilation performance accompanying this can be achieved. That is, the inner diameter Dui at the uppermost portion of the blade 11 is larger than D1 and is caused by the expansion of the suction region.

（参考例１）
図７は、本発明の参考例１におけるターボファンの要部断面図、図８は、図７のＥ−Ｅ断面図、図９は、図７のＦ−Ｆ断面図である。なお、従来例と同一部分は、同一符号を付してその説明を省略する。 ( Reference Example 1 )
7 is a cross-sectional view of the main part of the turbofan in Reference Example 1 of the present invention, FIG. 8 is a cross-sectional view taken along line EE in FIG. 7, and FIG. 9 is a cross-sectional view taken along line FF in FIG. In addition, the same part as a prior art example attaches | subjects the same code | symbol, and abbreviate | omits the description.

ブレード１１の上部において、Ｅ−Ｅ断面（図８）でのキャンバーラインの中心ＣＰを基準に相似縮小して、その相似縮小した断面を第１の実施の形態に述べた方法で移動させて、ブレード１１の最上部形状を図９（Ｆ−Ｆ断面図）のようにして連続構成してターボファン１０を形成したものである。   In the upper part of the blade 11, similar reduction is performed on the basis of the center CP of the camber line in the EE cross section (FIG. 8), and the similar reduced cross section is moved by the method described in the first embodiment. The uppermost shape of the blade 11 is continuously configured as shown in FIG. 9 (FF sectional view) to form the turbofan 10.

この方法によりブレード１１の最上部の内径ＤｕｉはＤ１より大きくなり、吸込み面積が大きく拡大され、また、ブレード１１の上部の傾斜した領域の負圧面に流れ誘引され風量性能が向上する。また、基本のブレード形状は相似縮小された形状であるため、騒音性能を同一に保つことができる。   By this method, the inner diameter Dui at the uppermost part of the blade 11 becomes larger than D1, the suction area is greatly enlarged, and the air flow performance is improved by being induced to flow on the suction surface of the inclined area above the blade 11. In addition, since the basic blade shape is a similarly reduced shape, the noise performance can be kept the same.

（実施の形態３）
図１０は、本発明の第３の実施の形態におけるターボファンの要部断面図、図１１は、図１０のＧ−Ｇ断面図、図１２は、図１０のＨ−Ｈ断面図である。なお、従来例と同一部分は、同一符号を付してその説明を省略する。 (Embodiment 3 )
FIG. 10 is a cross-sectional view of a main part of a turbo fan according to a third embodiment of the present invention, FIG. 11 is a cross-sectional view taken along the line GG in FIG. 10, and FIG. In addition, the same part as a prior art example attaches | subjects the same code | symbol, and abbreviate | omits the description.

ブレード１１の上部において、ブレードの吹き出し部の最上部位置の断面であるＧ−Ｇ断面（図１１）でのキャンバーラインの前縁先端ＬＰを基準に相似縮小して、その相似縮小した断面を第１の実施の形態で述べた方法で移動させて、ブレード１１の最上部形状を図１２（Ｇ−Ｇ断面）に示すような形状にして連続構成してターボファン１０を形成したものである。 In the upper part of the blade 11, the similarity is reduced on the basis of the leading edge tip LP of the camber line in the GG cross section (FIG. 11) which is a cross section of the uppermost position of the blowing part of the blade , and the similar reduced cross section is obtained. The turbofan 10 is formed by moving the blade 11 by the method described in the first embodiment so that the uppermost shape of the blade 11 is continuously formed as shown in FIG. 12 (GG cross section).

この方法により、ブレード１１上部の傾斜した領域の負圧面に流れが誘引され、風量性能が向上する。また、ブレード１１の前縁の稜線が同じ吸込み径で一致するため、吸込みの流れのパターンが安定して騒音性能を同一に保つことができる。   By this method, the flow is attracted to the suction surface in the inclined area above the blade 11, and the air flow performance is improved. Moreover, since the ridgeline of the front edge of the blade 11 matches with the same suction diameter, the suction flow pattern can be stabilized and the noise performance can be kept the same.

（参考例２）
図１３は、本発明の参考例２におけるターボファンの要部断面図、図１４は、ターボファンの上面図である。なお、従来例と同一部分は、同一符号を付してその説明を省略する。 ( Reference Example 2 )
FIG. 13 is a cross-sectional view of a main part of a turbo fan according to Reference Example 2 of the present invention, and FIG. 14 is a top view of the turbo fan. In addition, the same part as a prior art example attaches | subjects the same code | symbol, and abbreviate | omits the description.

ブレード１１の最上部形状のキャンバーラインと側板１３との交点を前縁先端ＬＰとして仮想のブレード断面（一点鎖線）を想定して、前縁先端ＬＰから基準（Ｉ−Ｉ）とした断面での前縁先端ＬＰ’を連続接続させてターボファン１０を形成したものである。この方法により、ブレード１１の前縁の上部からの流れによる前縁剥離が抑制されて低騒音化が図ることができる。   Assuming an imaginary blade cross-section (dashed line) with the intersection of the uppermost camber line of the blade 11 and the side plate 13 as the front-edge tip LP, a cross-section with a reference (II) from the front-edge tip LP The turbo fan 10 is formed by continuously connecting the leading edge tips LP ′. By this method, the leading edge peeling due to the flow from the upper part of the leading edge of the blade 11 is suppressed, and the noise can be reduced.

（参考例３）
図１５は、本発明の参考例３におけるターボファンの要部断面図、図１６は、ターボファンの上面図である。なお、従来例と同一部分は、同一符号を付してその説明を省略する。 ( Reference Example 3 )
FIG. 15 is a cross-sectional view of a main part of a turbo fan in Reference Example 3 of the present invention, and FIG. 16 is a top view of the turbo fan. In addition, the same part as a prior art example attaches | subjects the same code | symbol, and abbreviate | omits the description.

ブレード１１の最上部形状の前縁先端ＬＰから基準Ｊ−Ｊとした断面での前縁ＬＰ’を略円弧または略楕円形状で峰部を接続させてターボファン１０を形成するものである。   The turbo fan 10 is formed by connecting the ridges of the leading edge LP 'in the cross section taken as the reference JJ from the leading edge tip LP of the uppermost shape of the blade 11 in a substantially arc shape or a substantially elliptical shape.

この方法により、ブレード１１前縁の上部及び回転方向からの流れによる前縁剥離が抑制されて低騒音化を図ることができる。   By this method, the leading edge peeling due to the flow from the upper portion of the blade 11 and the rotation direction is suppressed, and noise can be reduced.

（実施の形態４）
図１７は、本発明の第４の実施の形態におけるターボファンの要部断面図、図１８は、ターボファンの上面図及び図１７のＫ−Ｋ、Ｌ−Ｌ、Ｍ−Ｍの各断面を示している。なお、従来例と同一部分は、同一符号を付してその説明を省略する。 (Embodiment 4 )
FIG. 17 is a cross-sectional view of an essential part of a turbo fan according to a fourth embodiment of the present invention. FIG. 18 is a top view of the turbo fan and cross sections KK, LL, and MM in FIG. Show. In addition, the same part as a prior art example attaches | subjects the same code | symbol, and abbreviate | omits the description.

ブレード１１で最上部形状が規定された場合に、最上部形状のキャンバーラインが峰部（Ａｔ、Ｂｔ、Ｃｔ…）となるように、ブレード１１の圧力面と負圧面を略円弧または略楕円形状で接続させるようにする。   When the uppermost shape is defined by the blade 11, the pressure surface and the suction surface of the blade 11 are substantially arc-shaped or substantially elliptical so that the camber line of the uppermost shape becomes a peak (At, Bt, Ct...). Connect with.

これにより、ブレード１１全領域において、上部形状が略円弧または略楕円形状となるため、上部からの吸込み流れが円滑になり、ブレード１１の前縁からの吸込み流れとも円滑に合流できて、大きな乱れもなく送風性能が向上する。   As a result, the upper part has a substantially circular arc shape or a substantially elliptical shape in the entire region of the blade 11, so that the suction flow from the upper part is smooth, and the suction flow from the front edge of the blade 11 can be smoothly merged, resulting in large disturbance. The air blowing performance is improved.

以上のように、本発明にかかるターボファン及び空気調和機は、送風性能が向上し、且つ騒音が低減されるので、遠心型送風機やそれを用いた各種機器、装置にも適用できる。   As described above, the turbo fan and the air conditioner according to the present invention can be applied to a centrifugal blower and various devices and apparatuses using the same because air blowing performance is improved and noise is reduced.

本発明の実施の形態１におけるターボファンの要部断面図Sectional drawing of the principal part of the turbo fan in Embodiment 1 of this invention 図１のＡ−Ａ断面図AA sectional view of FIG. 図１のＢ−Ｂ断面図BB sectional view of FIG. 本発明の実施の形態２におけるターボファンの要部断面図Sectional drawing of the principal part of the turbofan in Embodiment 2 of this invention 図４のＣ−Ｃ断面図CC sectional view of FIG. 図４のＤ−Ｄ断面図DD sectional view of FIG. 本発明の参考例１におけるターボファンの要部断面図Sectional drawing of the principal part of the turbofan in the reference example 1 of this invention 図７のＥ−Ｅ断面図EE sectional view of FIG. 図７のＦ−Ｆ断面図FF sectional view of FIG. 本発明の実施の形態３におけるターボファンの要部断面図Sectional drawing of the principal part of the turbofan in Embodiment 3 of this invention 図１０のＧ−Ｇ断面図GG sectional view of FIG. 図１０のＨ−Ｈ断面図HH sectional view of FIG. 本発明の参考例２におけるターボファンの要部断面図Sectional drawing of the principal part of the turbofan in the reference example 2 of this invention 同ターボファンの上面図Top view of the turbofan 本発明の参考例３におけるターボファンの要部断面図Sectional drawing of the principal part of the turbofan in the reference example 3 of this invention 同ターボファンの上面図Top view of the turbofan 本発明の実施の形態４におけるターボファンの要部断面図Sectional drawing of the principal part of the turbofan in Embodiment 4 of this invention 同ターボファンの上面図Top view of the turbofan 従来のターボファンを搭載した空気調和機の断面図Sectional view of an air conditioner equipped with a conventional turbofan 同ターボファンの斜視図Perspective view of the turbofan 同ターボファンの要部拡大断面図An enlarged sectional view of the main part of the turbofan 図２１のＮ−Ｎ断面図NN cross section of FIG.

符号の説明Explanation of symbols

５ 電動機
６ 熱交換器
７ ケーシング
８ 吸込みリング
１０ ターボファン
１１ ブレード
１２ 主板
１３ シュラウド
１３ｂ 吸い込み部
１３ｃ 吹き出し部 DESCRIPTION OF SYMBOLS 5 Electric motor 6 Heat exchanger 7 Casing 8 Suction ring 10 Turbofan 11 Blade 12 Main plate 13 Shroud 13b Suction part 13c Outlet part

Claims (5)

電動機を覆うと共に前記電動機のシャフトに固定される主板と、吸い込み部と吹き出し部を有するシュラウドと、前記主板と前記シュラウド間に配された複数のブレードとで構成し、前記ブレードの最上部形状を、前記ブレードの吹き出し部の最上部位置の断面でのキャンバーラインを維持して前記ブレードの前縁先端を中心に前記主板の回転方向に連続的に回転させるとともに、前記キャンバーラインに同一の肉厚を分布させて形成したことを特徴とするターボファン。 A main plate that covers the electric motor and is fixed to the shaft of the electric motor, a shroud having a suction portion and a blowing portion, and a plurality of blades disposed between the main plate and the shroud, and the uppermost shape of the blade is Maintaining the camber line in the cross section of the uppermost position of the blowing part of the blade and continuously rotating it in the rotation direction of the main plate around the leading edge tip of the blade, and having the same thickness as the camber line Turbofan characterized by being distributed. 電動機を覆うと共に前記電動機のシャフトに固定される主板と、吸い込み部と吹き出し部を有するシュラウドと、前記主板と前記シュラウド間に配された複数のブレードとで構成し、前記ブレードの最上部形状を、前記ブレードの吹き出し部の最上部位置の断面でのキャンバーラインを基準に、そのキャンバーラインの突出方向に連続的にオフセット移動（略同心円方向移動）させるとともに、前記キャンバーラインに同一の肉厚を分布させて形成したことを特徴とするターボファン。 A main plate that covers the electric motor and is fixed to the shaft of the electric motor, a shroud having a suction portion and a blowing portion, and a plurality of blades disposed between the main plate and the shroud, and the uppermost shape of the blade is The camber line is continuously offset in the protruding direction of the camber line (substantially concentrically moved) with reference to the camber line in the cross section of the uppermost position of the blowing part of the blade, and the camber line has the same thickness A turbofan characterized by being distributed. 電動機を覆うと共に前記電動機のシャフトに固定される主板と、吸い込み部と吹き出し部を有するシュラウドと、前記主板と前記シュラウド間に配された複数のブレードとで構成し、前記ブレードの最上部形状を、前記ブレードの吹き出し部の最上部位置の断面でのキャンバーラインの先端を基準に相似縮小して、前記相似縮小した断面を、前記ブレードの前縁先端を中心に前記主板の回転方向に連続的に回転させて形成したことを特徴とするターボファン。 A main plate that covers the electric motor and is fixed to the shaft of the electric motor, a shroud having a suction portion and a blowing portion, and a plurality of blades disposed between the main plate and the shroud, and the uppermost shape of the blade is , By reducing the similarity with respect to the tip of the camber line in the cross section of the uppermost position of the blowing portion of the blade, and continuously reducing the similar reduced cross section in the direction of rotation of the main plate around the tip of the leading edge of the blade features and to filter Bofan that formed is rotated. ブレードの最上部形状を、前記ブレードの吹き出し部の最上部位置の断面でのキャンバーラインを維持して、主板の回転方向に連続的に回転させて形成し、前記最上部形状のキャンバーラインが峰部となるように、前記ブレードの圧力面と負圧面を略円弧状又は略楕円状に接続することを特徴とする請求項１記載のターボファン。 The uppermost shape of the blade is formed by continuously rotating in the rotation direction of the main plate while maintaining the camber line in the cross section of the uppermost position of the blowing portion of the blade. The turbofan according to claim 1, wherein the pressure surface and the suction surface of the blade are connected in a substantially arc shape or a substantially elliptical shape so as to be a part. 熱交換器と、請求項１〜４のいずれか１項に記載のターボファンを備えた空気調和機。 The air conditioner provided with the heat exchanger and the turbo fan of any one of Claims 1-4.
JP2004138209A 2004-05-07 2004-05-07 Turbofan and air conditioner using the same Expired - Fee Related JP4590923B2 (en)

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JPWO2007119532A1 (en) * 2006-03-29 2009-08-27 東芝キヤリア株式会社 Turbo fan and air conditioner
KR20070101642A (en) 2006-04-11 2007-10-17 삼성전자주식회사 Turbo fan

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60156997A (en) * 1984-01-26 1985-08-17 Nippon Denso Co Ltd Centrifugal type blower fan
JPH0270997A (en) * 1988-09-06 1990-03-09 Matsushita Refrig Co Ltd Centrifugal blower
JPH10196591A (en) * 1997-01-06 1998-07-31 Matsushita Refrig Co Ltd Air conditioner
JP2001132687A (en) * 1999-11-10 2001-05-18 Mitsubishi Electric Corp Impeller of centrifugal air blower and air conditioner
JP2003206892A (en) * 2002-01-10 2003-07-25 Mitsubishi Heavy Ind Ltd Turbo fan and air conditioner therewith

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60156997A (en) * 1984-01-26 1985-08-17 Nippon Denso Co Ltd Centrifugal type blower fan
JPH0270997A (en) * 1988-09-06 1990-03-09 Matsushita Refrig Co Ltd Centrifugal blower
JPH10196591A (en) * 1997-01-06 1998-07-31 Matsushita Refrig Co Ltd Air conditioner
JP2001132687A (en) * 1999-11-10 2001-05-18 Mitsubishi Electric Corp Impeller of centrifugal air blower and air conditioner
JP2003206892A (en) * 2002-01-10 2003-07-25 Mitsubishi Heavy Ind Ltd Turbo fan and air conditioner therewith

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