JP2004301451A - Outdoor machine for air conditioner - Google Patents

Outdoor machine for air conditioner Download PDF

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Publication number
JP2004301451A
JP2004301451A JP2003096748A JP2003096748A JP2004301451A JP 2004301451 A JP2004301451 A JP 2004301451A JP 2003096748 A JP2003096748 A JP 2003096748A JP 2003096748 A JP2003096748 A JP 2003096748A JP 2004301451 A JP2004301451 A JP 2004301451A
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JP
Japan
Prior art keywords
trailing edge
axial
blade
air
air conditioner
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.)
Pending
Application number
JP2003096748A
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Japanese (ja)
Inventor
Mitsuyoshi Ishijima
満義 石嶋
Akihiro Takeuchi
章洋 竹内
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.)
Toshiba Carrier Corp
Original Assignee
Toshiba Carrier Corp
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 Toshiba Carrier Corp filed Critical Toshiba Carrier Corp
Priority to JP2003096748A priority Critical patent/JP2004301451A/en
Priority to CNB2004800085038A priority patent/CN100343590C/en
Priority to EP04724144A priority patent/EP1610068B1/en
Priority to ES04724144T priority patent/ES2332591T3/en
Priority to PCT/JP2004/004426 priority patent/WO2004088210A1/en
Priority to CNB2007100057438A priority patent/CN100480591C/en
Priority to KR1020057018293A priority patent/KR100724824B1/en
Publication of JP2004301451A publication Critical patent/JP2004301451A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/40Vibration or noise prevention at outdoor units
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00Axial-flow pumps
    • F04D19/002Axial flow fans
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/26Rotors specially for elastic fluids
    • F04D29/32Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38Blades
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/26Rotors specially for elastic fluids
    • F04D29/32Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38Blades
    • F04D29/384Blades characterised by form
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/38Fan details of outdoor units, e.g. bell-mouth shaped inlets or fan mountings

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

Abstract

<P>PROBLEM TO BE SOLVED: To provide an outdoor machine for air conditioner provided with an axial blower capable of rectifying the air flow at a blade trailing edge part by optimizing the axial positional relationship between the blade trailing edge part and a bell-mouth, and inhibiting the increase of blowing noise. <P>SOLUTION: This outdoor machine for air conditioner is the axial blower 8 having an axial fan 10 formed by arranging the plurality of blades having an outline of the blade trailing edge part 22 recessed in the blade front edge direction, along an outer peripheral face of a hub 10a at specific intervals, and the bell-mouth 9 mounted at an air blowout side of the axial fans 10, and it is constituted so that the bell-mouth 9 and the axial blower 8 are arranged in a state of satisfying that X/L is within a range of 0.2-0.8, when a point recessed most of the outline of the blade trailing edge 22 is G, a distance between the point G and an air outflow face 9a of the bell-mouth 9 is X and the axial length of the bell-mouth 9 is L. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、空気調和機の室外機に使用される軸流送風機の構造に関する。
【0002】
【従来の技術】
従来、空気調和装置の室外機は、吹出し口にベルマウスを設け、このベルマウスの空気流入方向に、回転ハブの外周面に沿って翼を所定の間隔を存して複数配置して形成される軸流ファンが配置されている。
この軸流ファンの回転に伴って空気は軸方向に送風され、翼の前縁部が空気の導入方向となり、翼の後縁部が空気の流出方向となる。
【0003】
近年、送風風量の増加と、電動機負荷の低減するために、翼前縁部と翼外周部が交わる角部が回転方向側に大きく突出する一方で、後縁部の輪郭線が空気入流方向に凹状に形成された軸流ファンが用いられている。(例えば、特許文献1参照)。
上記の軸流ファンにおいては、翼後縁部を略直線状に形成した場合に比べて、翼後縁部後流で生じる渦の発生を低減することができ、送風騒音低減と電動機負荷低減の効果が得られる。
【0004】
【特許文献1】
特開2002−257088号公報
【0005】
【発明が解決しようとする課題】
しかしながら、従来の軸流ファンでは、翼後縁部の輪郭線が、ベルマウスの空気流入面の側周端よりも空気導入方向に位置しているために、翼後縁部より流出する空気が前記ベルマウスの空気流入面の周端部に衝突して渦が発生し、送風騒音が増大していた。
【0006】
本発明は、上記事情を考慮してなされたものであり、その目的は、翼後縁部とベルマウスとの軸方向の位置関係を最適にすることで翼後縁部の整流化を図り、送風騒音の増加を抑えることができる軸流送風機を備えた空気調和装置の室外機を提供することにある。
【0007】
【課題を解決するための手段】
上記課題を解決するため、本発明の請求項1に係る発明は、翼後縁部の輪郭線が翼前縁方向に凹状に形成された翼を、ハブの外周面に沿って所定の間隔を在して複数配置して形成される軸流ファンと、前記軸流ファンによる空気吹出し側に配置されるベルマウスとを有する空気調和装置の室外機であって、前記翼後縁の輪郭線の最も凹んだ点を点Gとし、この点Gと前記ベルマウスの空気流出面との距離をXとし、前記ベルマウスの軸方向長さをLとしたとき、X/Lが0.2〜0.8の範囲となるように前記ベルマウスと前記軸流ファンとを配置した。
【0008】
請求項2に係る発明は、翼後縁部の輪郭線が翼前縁方向に凹状に形成された翼を、ハブの外周面に沿って所定の間隔を在して複数配置して形成される軸流ファンと、前記軸流ファンによる空気吹出し側に配置されるベルマウスとを有する軸流送風機であって、前記翼の円周方向の輪郭線と前記翼後縁部の輪郭線とが交差する点を点Qとし、この点Qと前記ベルマウスの空気流出面との距離をYとし、前記ベルマウスの軸方向長さをLとしたとき、Y/Lが0.3〜0.9の範囲となるように前記ベルマウスと前記軸流ファンとを配置した。
【0009】
請求項3に係る発明は、前記翼後縁部の輪郭線の凹形状を円弧状に形成した。
【0010】
【発明の実施の形態】
以下、本発明に係る実施の形態を図1〜図8に基づいて説明する。
図1は,一般的な空気調和装置の室外ユニットの断面図であり、この図1において、1は空気調和装置の室外ユニットを示している。
この室外ユニット1は図示しない室内ユニットと接続して使用され、室外の床面に配置される底板2と、この底板2上に配置される後述の構成部品と、吹出し口4及びこの吹出し口4を覆うファンガード5を有し、上記構成部品および底板2を覆うように設けられる本体カバー3とで構成されている。
【0011】
室外ユニット1はその内部に、構成部品として、冷凍サイクルに冷媒を循環させる圧縮機6と、冷媒が流れる伝熱管に所定の間隔を有して板状放熱フィンが積層された室外熱交換器7等の冷凍サイクル部品と、室外熱交換器7に室外空気を送る送風機8と、吹出し口4に設けら得たベルマウス9とを有している。
【0012】
上記送風機8は、軸流ファン10と、ファン用モータ11とからなり、室外熱交換器7とベルマウス9との間に設けられている。
上記ファン用モータ11は、底板2に設けられたモータ固定板11aにネジ等の固定具で取り付けられている。
ここで、上記構成部品は、軸流ファン10により生じる空気の流れの上流側から、室外熱交換器7、ファン用モータ11、軸流ファン10、ベルマウス9の順に軸方向に並んで配置される。
【0013】
図2は、本発明の軸流ファン10を翼10bの正圧面側から見たときの全体構成を示す平面図であり,図3は図2の1つの翼10bを拡大して示した図である。
軸流ファン10は、円筒状のハブ10aの外周面側面に、複数枚の翼10bを例えば周方向等分位置にて一体ないし一体的に取り付けており、例えば樹脂モールド成形等により一体に成形される。
ハブ10aには、その中心部にファン用モータ11の回転軸が挿入固定されており、軸流ファン10は、ファン用モータ11により矢印M方向に回転される。
【0014】
上記翼10bのハブ10aと一体に連設される部分を根元部20と呼び、回転前側を翼前縁部21と呼び、回転後側を翼後縁部22と呼び、これら翼前縁部21外周端部と翼後縁22外周端部を結ぶ端部を翼外周部23と呼ぶ。
また、軸流ファン10の回転にともなう翼10b上の空気の流れを基準にすると、上記翼前縁部21が空気の導入方向であり、上記翼後縁部22が空気の流出方向である。
【0015】
上記翼前縁部21は、根元部20から翼外周部23にむけて回転方向へ大きく突出しており、上記翼後縁部22の輪郭線は、空気の流出方向とは反対の導入方向に凹んだ円弧状の凹状に形成されている。
そして、上記翼後縁部22と翼外周部23とで形成される角部は、空気の流出方向に膨出した凸状の膨出部24が形成されている。
【0016】
上記軸流ファン10の回転により、空気は室外機内部に吸込まれ、室外熱交換器7、軸流ファン10、ベルマウス9を順に介してファンガード5から室外機1外部へ排出される。
【0017】
図4は、軸流ファン10とベルマウス9との位置関係を示す図であり、ベルマウス9は、本体カバー3の吹出し口4の周囲に設けられ、その軸方向において軸流ファン10の翼後縁部22と対向している。
ここで、翼10bの翼後縁部22は、ベルマウス9と軸方向に完全にラップするように配置されている。
【0018】
図5は、図4において翼10bの翼後縁部22の最も凹んだ点を点Gとし、この点Gとベルマウス9の空気流出面9bとの距離をXとし、ベルマウス9の軸方向長さをLとしたときの、X/Lと送風騒音との関係を示す線図である。
図5に示されるように、点Gからベルマウス空気流出面9bまでの長さXが、ベルマウス9の軸方向長さLの約20%から80%(0.2L〜0.8L)に至る範囲に軸流ファン10及びベルマウス9を配置することにより、送風騒音が減少し、特に50%付近で送風騒音が最小になり、上記の範囲にXを設定することが送風騒音を低減するために有効であることが実験的に判明した。
これにより、翼後縁部22より流出した空気がベルマウス9の空気流入面9aの周端部と衝突することによって発生する渦を抑制することができ、この渦による送風騒音を低減することができる。
【0019】
次に、本発明に係わる空気調和装置の室外機の第2の実施の形態について説明する。
この第2の実施の形態の各部について、図4の第1の実施の形態の各部と同一部分は同一符号で示し、その説明を省略する。
この第2の実施の形態においては、翼10bの膨出部24がベルマウス9の空気流出面9bから軸方向に突出しないように配置されている。
【0020】
図6は、翼10bの翼外周部23と前記翼後縁部22とが交差する点を点Qとし、この点Qとベルマウス9の空気流出面9aとの距離をYとし、ベルマウス9の軸方向長さをLとしたときの、Y/Lと送風騒音との関係を示す線図である。
図6に示されるように、点Qからベルマウス空気流出面9bまでの長さYが、ベルマウス9の軸方向長さLの約30%から90%(0.3L〜0.9L)に至る範囲に軸流ファン10及びベルマウス9を配置することにより、送風騒音が減少し、特に60%付近で送風騒音が最小になり、上記の範囲にYを設定することが送風騒音を低減するために有効であることが実験的に判明した。
これにより、膨出部24から流出した空気が軸流ファン10の後流側のファンガード5と衝突することによって発生する渦を抑制することができ、この渦による送風騒音を低減することができる。
【0021】
次に、本発明に係わる空気調和装置の室外機の第3の実施の形態について図7を用いて説明する。
この第3の実施の形態の各部について、図3の第1の実施の形態の各部と同一部分は同一符号で示し、その説明を省略する。
本第3の実施の形態は、上記第1の実施の形態に用いられる軸流ファンに翼後縁部の輪郭線が略V字状の凹状に形成された軸流ファンを用いるものである。
図7に示すように、軸流ファン10は、翼後縁部22の輪郭線が、空気の流出方向とは反対の導入方向に凹んだ略V字状の凹状に形成されている。
ここで、V字状の頂点Zが、上記第1の実施の形態における点Gに相当し、V字状の後縁部22と翼外周部23とが交差する点Q1が、上記第1の実施の形態における点Qに相当する。
このような形状においても、上記第1の実施の形態と同等の効果が得られる。
【0022】
次に、本発明に係わる空気調和装置の室外機の第4の実施の形態について図8を用いて説明する。
この第4の実施の形態の各部について、図3の第1の実施の形態の各部と同一部分は同一符号で示し、その説明を省略する。
本第4の実施の形態は、上記第1の実施の形態に用いられる軸流ファンに翼後縁部の輪郭線が台形状の凹状に形成された軸流ファンを用いるものである。
図8に示すように、軸流ファン10は、翼後縁部22の輪郭線が、空気の流出方向とは反対の導入方向に凹んだ台形状の凹状に形成されている。
ここで、台形状の上辺Uが、上記第1の実施の形態における点Gに相当し、台形状の後縁部22と翼外周部23とが交差する点Q2が、上記第1の実施の形態における点Qに相当する。
このような形状においても、上記第1の実施の形態と同等の効果が得られる。
【発明の効果】
以上説明したように、本発明によれば、空気調和装置の室外機において、翼後縁部に発生する渦を抑制して、送風騒音を低減することのできる軸流送風機を備えた空気調和装置の室外機を提供することができる。
【図面の簡単な説明】
【図1】本発明に係る空気調和装置の室外機の断面図。
【図2】本発明に係る軸流ファンを翼の正圧面側から見たときの全体構成を示す平面図。
【図3】図2に示した軸流ファンの一つの翼を拡大して示した図。
【図4】本発明に係る軸流ファンとベルマウスの位置関係を示した図。
【図5】X/Lと送風騒音との関係を示す線図。
【図6】Y/Lと送風騒音との関係を示す線図。
【図7】第3実施形態に係るの軸流ファンを翼の一つの翼を拡大して示した図。
【図8】第4実施形態に係るの軸流ファンを翼の一つの翼を拡大して示した図。
【符号の説明】
9…ベルマウス、10…軸流ファン、10a…ハブ、10b…翼、22…翼後縁部
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a structure of an axial blower used for an outdoor unit of an air conditioner.
[0002]
[Prior art]
Conventionally, an outdoor unit of an air conditioner is formed by providing a bell mouth at an outlet, and arranging a plurality of blades at predetermined intervals along an outer peripheral surface of a rotating hub in an air inflow direction of the bell mouth. Axial fan is arranged.
The air is blown in the axial direction with the rotation of the axial fan, and the leading edge of the blade is in the air introduction direction, and the trailing edge of the blade is in the air outflow direction.
[0003]
In recent years, in order to increase the amount of blown air and reduce the motor load, the corners where the leading edge of the blade and the outer periphery of the blade intersect greatly protrude in the rotation direction, while the contour of the trailing edge extends in the air inflow direction. An axial fan formed in a concave shape is used. (For example, see Patent Document 1).
In the above axial flow fan, the generation of vortices generated in the wake of the trailing edge of the blade can be reduced, as compared with the case where the trailing edge of the blade is formed in a substantially straight line, thereby reducing the blowing noise and the motor load. The effect is obtained.
[0004]
[Patent Document 1]
JP-A-2002-257088
[Problems to be solved by the invention]
However, in the conventional axial flow fan, since the contour of the trailing edge of the blade is located more in the air introduction direction than the side peripheral end of the air inlet surface of the bell mouth, air flowing out of the trailing edge of the blade is reduced. A vortex was generated by colliding with the peripheral end of the air inflow surface of the bell mouth, and the blowing noise increased.
[0006]
The present invention has been made in consideration of the above circumstances, and aims to rectify the wing trailing edge by optimizing the axial positional relationship between the wing trailing edge and the bellmouth, It is an object of the present invention to provide an outdoor unit of an air conditioner including an axial blower capable of suppressing an increase in blowing noise.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 of the present invention provides a wing having a contour of a wing trailing edge formed in a concave shape in a wing leading edge direction at a predetermined interval along an outer peripheral surface of a hub. An outdoor unit of an air conditioner having an axial flow fan formed and arranged in plurality and a bell mouth arranged on an air blowing side by the axial flow fan, wherein the contour line of the trailing edge of the blade is When the most concave point is point G, the distance between this point G and the air outflow surface of the bell mouth is X, and the axial length of the bell mouth is L, X / L is 0.2 to 0. The bell mouth and the axial fan were arranged so as to fall within a range of 0.8.
[0008]
The invention according to claim 2 is formed by arranging a plurality of wings having contours of the wing trailing edge concave in the wing leading edge direction at predetermined intervals along the outer peripheral surface of the hub. An axial blower having an axial fan and a bellmouth disposed on an air blowing side of the axial fan, wherein a circumferential contour of the blade intersects a contour of a trailing edge of the blade. When the distance between the point Q and the air outlet surface of the bell mouth is Y, and the length of the bell mouth in the axial direction is L, Y / L is 0.3 to 0.9. The bell mouth and the axial flow fan were arranged so as to fall within the range.
[0009]
In the invention according to claim 3, the concave shape of the contour line of the trailing edge of the wing is formed in an arc shape.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment according to the present invention will be described with reference to FIGS.
FIG. 1 is a sectional view of an outdoor unit of a general air conditioner. In FIG. 1, reference numeral 1 denotes an outdoor unit of the air conditioner.
The outdoor unit 1 is used in connection with an indoor unit (not shown), and has a bottom plate 2 disposed on an outdoor floor, components to be described later disposed on the bottom plate 2, an outlet 4 and an outlet 4 And a main body cover 3 provided so as to cover the above components and the bottom plate 2.
[0011]
The outdoor unit 1 includes therein a compressor 6 that circulates a refrigerant in a refrigeration cycle and an outdoor heat exchanger 7 in which plate-shaped radiation fins are stacked at predetermined intervals on a heat transfer tube through which the refrigerant flows. And the like, a blower 8 for sending outdoor air to the outdoor heat exchanger 7, and a bell mouth 9 provided at the outlet 4.
[0012]
The blower 8 includes an axial fan 10 and a fan motor 11, and is provided between the outdoor heat exchanger 7 and the bell mouth 9.
The fan motor 11 is attached to a motor fixing plate 11a provided on the bottom plate 2 with a fixing tool such as a screw.
Here, the above components are arranged in the axial direction in the order of the outdoor heat exchanger 7, the fan motor 11, the axial fan 10, and the bell mouth 9 from the upstream side of the flow of air generated by the axial fan 10. You.
[0013]
FIG. 2 is a plan view showing the overall configuration of the axial flow fan 10 of the present invention when viewed from the pressure side of the blade 10b, and FIG. 3 is an enlarged view of one blade 10b of FIG. is there.
In the axial fan 10, a plurality of blades 10b are integrally or integrally attached to a side surface of an outer peripheral surface of a cylindrical hub 10a, for example, at equal positions in a circumferential direction, and are integrally formed by, for example, resin molding. You.
The rotation shaft of the fan motor 11 is inserted and fixed at the center of the hub 10a, and the axial fan 10 is rotated in the direction of arrow M by the fan motor 11.
[0014]
A portion of the wing 10b integrally connected to the hub 10a is referred to as a root portion 20, a front side is referred to as a wing leading edge portion 21, a rear side is referred to as a wing trailing edge portion 22, and these wing leading edges 21 are referred to. An end connecting the outer peripheral end to the outer peripheral end of the wing trailing edge 22 is referred to as a wing outer peripheral part 23.
On the basis of the flow of air on the blade 10b accompanying the rotation of the axial fan 10, the blade leading edge 21 is in the air introduction direction, and the blade trailing edge 22 is in the air outflow direction.
[0015]
The wing leading edge 21 protrudes greatly from the root 20 toward the wing outer peripheral portion 23 in the rotational direction, and the contour of the wing trailing edge 22 is recessed in the introduction direction opposite to the air outflow direction. It is formed in an elliptical concave shape.
The corner formed by the blade trailing edge 22 and the blade outer peripheral portion 23 is formed with a convex bulge 24 bulging in the air outflow direction.
[0016]
By the rotation of the axial fan 10, air is sucked into the outdoor unit, and is discharged from the fan guard 5 to the outside of the outdoor unit 1 via the outdoor heat exchanger 7, the axial fan 10, and the bell mouth 9 in this order.
[0017]
FIG. 4 is a diagram showing a positional relationship between the axial fan 10 and the bell mouth 9. The bell mouth 9 is provided around the outlet 4 of the main body cover 3, and the blade of the axial fan 10 is arranged in the axial direction. It is opposed to the trailing edge 22.
Here, the wing trailing edge portion 22 of the wing 10b is disposed so as to completely wrap the bellmouth 9 in the axial direction.
[0018]
FIG. 5 shows a point G where the most concave point of the wing trailing edge 22 of the wing 10 b in FIG. 4 is X, and a distance between this point G and the air outflow surface 9 b of the bell mouth 9 is X. FIG. 4 is a diagram illustrating a relationship between X / L and blowing noise when a length is L.
As shown in FIG. 5, the length X from the point G to the bellmouth air outflow surface 9 b is about 20% to 80% (0.2 L to 0.8 L) of the axial length L of the bellmouth 9. By arranging the axial flow fan 10 and the bell mouth 9 in the range, the blast noise is reduced, and especially the blast noise is minimized at around 50%, and setting X in the above range reduces the blast noise. Experimentally proved to be effective.
Thereby, it is possible to suppress the vortex generated when the air flowing out from the wing trailing edge portion 22 collides with the peripheral end of the air inflow surface 9a of the bell mouth 9, and it is possible to reduce the blowing noise due to the vortex. it can.
[0019]
Next, a second embodiment of the outdoor unit of the air conditioner according to the present invention will be described.
Regarding each part of the second embodiment, the same parts as those of the first embodiment of FIG. 4 are denoted by the same reference numerals, and the description thereof will be omitted.
In the second embodiment, the bulging portion 24 of the wing 10 b is arranged so as not to protrude axially from the air outflow surface 9 b of the bellmouth 9.
[0020]
FIG. 6 shows a point Q at which a blade outer peripheral portion 23 of the blade 10 b intersects with the trailing edge 22 of the blade, a distance Y between the point Q and the air outflow surface 9 a of the bell mouth 9, FIG. 4 is a diagram showing the relationship between Y / L and blowing noise when the length in the axial direction is L.
As shown in FIG. 6, the length Y from the point Q to the bellmouth air outflow surface 9 b is about 30% to 90% (0.3 L to 0.9 L) of the axial length L of the bellmouth 9. By arranging the axial fan 10 and the bell mouth 9 in the range, the blast noise is reduced, and especially the blast noise is minimized at around 60%. Setting Y in the above range reduces the blast noise. Experimentally proved to be effective.
Thereby, the vortex generated by the air flowing out of the bulging portion 24 colliding with the fan guard 5 on the downstream side of the axial fan 10 can be suppressed, and the blowing noise due to the vortex can be reduced. .
[0021]
Next, a third embodiment of the outdoor unit of the air conditioner according to the present invention will be described with reference to FIG.
Regarding each part of the third embodiment, the same parts as those of the first embodiment of FIG. 3 are denoted by the same reference numerals, and the description thereof will be omitted.
In the third embodiment, the axial fan used in the first embodiment has a contour of a trailing edge of the blade formed in a substantially V-shaped concave shape.
As shown in FIG. 7, in the axial flow fan 10, the contour of the blade trailing edge portion 22 is formed in a substantially V-shaped concave shape that is concave in the introduction direction opposite to the air outflow direction.
Here, the V-shaped apex Z corresponds to the point G in the first embodiment, and the point Q1 at which the V-shaped trailing edge portion 22 and the blade outer peripheral portion 23 intersect is the first Q. This corresponds to point Q in the embodiment.
Even in such a shape, the same effect as in the first embodiment can be obtained.
[0022]
Next, a fourth embodiment of the outdoor unit of the air conditioner according to the present invention will be described with reference to FIG.
Regarding each part of the fourth embodiment, the same parts as those of the first embodiment of FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted.
The fourth embodiment uses an axial fan having a trapezoidal concave contour at the trailing edge of the blade for the axial fan used in the first embodiment.
As shown in FIG. 8, in the axial fan 10, the contour of the blade trailing edge 22 is formed in a trapezoidal concave shape that is concave in the introduction direction opposite to the air outflow direction.
Here, the upper side U of the trapezoid corresponds to the point G in the first embodiment, and the point Q2 at which the trailing edge 22 of the trapezoid intersects with the outer peripheral portion 23 of the blade is the point Q2 of the first embodiment. This corresponds to point Q in the form.
Even in such a shape, the same effect as in the first embodiment can be obtained.
【The invention's effect】
As described above, according to the present invention, in an outdoor unit of an air conditioner, an air conditioner including an axial flow blower capable of suppressing a vortex generated at a trailing edge of a blade and reducing blowing noise. Outdoor unit can be provided.
[Brief description of the drawings]
FIG. 1 is a sectional view of an outdoor unit of an air conditioner according to the present invention.
FIG. 2 is a plan view showing the overall configuration of the axial fan according to the present invention when viewed from the pressure side of the blade.
FIG. 3 is an enlarged view showing one blade of the axial flow fan shown in FIG. 2;
FIG. 4 is a diagram showing a positional relationship between an axial fan and a bell mouth according to the present invention.
FIG. 5 is a diagram showing a relationship between X / L and blowing noise.
FIG. 6 is a diagram showing a relationship between Y / L and blowing noise.
FIG. 7 is an enlarged view of one of the blades of the axial fan according to the third embodiment.
FIG. 8 is an enlarged view of one of the blades of an axial fan according to a fourth embodiment.
[Explanation of symbols]
9: bell mouth, 10: axial fan, 10a: hub, 10b: wing, 22: wing trailing edge

Claims (3)

翼後縁部の輪郭線が翼前縁方向に凹状に形成された翼を、ハブの外周面に沿って所定の間隔を存して複数配置して形成される軸流ファンと、前記軸流ファンによる空気吹出し側に配置されるベルマウスとを有する空気調和装置の室外機であって、前記翼後縁の輪郭線の最も凹んだ点を点Gとし、この点Gと前記ベルマウスの空気流出面との距離をXとし、前記ベルマウスの軸方向長さをLとしたとき、X/Lが0.2〜0.8の範囲となるように前記ベルマウスと前記軸流ファンとを配置したことを特徴とする空気調和装置の室外機。An axial fan formed by arranging a plurality of blades having contours of the blade trailing edge in a concave shape in the direction of the blade leading edge at predetermined intervals along the outer peripheral surface of the hub; An outdoor unit of an air conditioner having a bell mouth disposed on an air outlet side of a fan, wherein a point G of the contour line of the trailing edge of the wing is most depressed, and the point G and the air of the bell mouth are aired. When the distance from the outflow surface is X and the length of the bellmouth in the axial direction is L, the bellmouth and the axial fan are arranged such that X / L is in the range of 0.2 to 0.8. An outdoor unit of an air conditioner, wherein the outdoor unit is arranged. 翼後縁部の輪郭線が翼前縁方向に凹状に形成された翼を、ハブの外周面に沿って所定の間隔を存して複数配置して形成される軸流ファンと、前記軸流ファンによる空気吹出し側に配置されるベルマウスとを有する空気調和装置の室外機であって、前記翼の円周方向の輪郭線と前記翼後縁部の輪郭線とが交差する点を点Qとし、この点Qと前記ベルマウスの空気流出面との距離をYとし、前記ベルマウスの軸方向長さをLとしたとき、Y/Lが0.3〜0.9の範囲となるように前記ベルマウスと前記軸流ファンとを配置したことを特徴とする空気調和装置の室外機。An axial fan formed by arranging a plurality of blades having contours of the blade trailing edge in a concave shape in the direction of the blade leading edge at predetermined intervals along the outer peripheral surface of the hub; An outdoor unit of an air conditioner having a bell mouth disposed on an air blowing side by a fan, wherein a point at which a circumferential contour of the wing intersects with a contour of a trailing edge of the wing intersects a point Q. When the distance between this point Q and the air outflow surface of the bell mouth is Y and the length of the bell mouth in the axial direction is L, Y / L is in the range of 0.3 to 0.9. An outdoor unit of an air conditioner, wherein the bell mouth and the axial fan are arranged in the air conditioner. 前記翼後縁部の輪郭線の凹形状は、円弧状に形成されることを特徴とする請求項1または請求項2に記載の空気調和装置の室外機。The outdoor unit of an air conditioner according to claim 1 or 2, wherein the concave shape of the contour of the trailing edge of the blade is formed in an arc shape.
JP2003096748A 2003-03-31 2003-03-31 Outdoor machine for air conditioner Pending JP2004301451A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP2003096748A JP2004301451A (en) 2003-03-31 2003-03-31 Outdoor machine for air conditioner
CNB2004800085038A CN100343590C (en) 2003-03-31 2004-03-29 Outdoor unit for air conditioner
EP04724144A EP1610068B1 (en) 2003-03-31 2004-03-29 Outdoor unit for air conditioner
ES04724144T ES2332591T3 (en) 2003-03-31 2004-03-29 OUTDOOR UNIT OF AIR CONDITIONER.
PCT/JP2004/004426 WO2004088210A1 (en) 2003-03-31 2004-03-29 Outdoor unit for air conditioner
CNB2007100057438A CN100480591C (en) 2003-03-31 2004-03-29 Outdoor unit for air conditioner
KR1020057018293A KR100724824B1 (en) 2003-03-31 2004-03-29 Outdoor unit for air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003096748A JP2004301451A (en) 2003-03-31 2003-03-31 Outdoor machine for air conditioner

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JP2004301451A true JP2004301451A (en) 2004-10-28

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ID=33127524

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JP2003096748A Pending JP2004301451A (en) 2003-03-31 2003-03-31 Outdoor machine for air conditioner

Country Status (6)

Country Link
EP (1) EP1610068B1 (en)
JP (1) JP2004301451A (en)
KR (1) KR100724824B1 (en)
CN (2) CN100343590C (en)
ES (1) ES2332591T3 (en)
WO (1) WO2004088210A1 (en)

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JP2014077437A (en) * 2012-09-19 2014-05-01 Toshiba Carrier Corp Propeller fan and outdoor air conditioner unit
WO2014128908A1 (en) * 2013-02-22 2014-08-28 日立アプライアンス株式会社 Propeller fan and air conditioner equipped with same

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JP2014077437A (en) * 2012-09-19 2014-05-01 Toshiba Carrier Corp Propeller fan and outdoor air conditioner unit
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JPWO2014128908A1 (en) * 2013-02-22 2017-02-02 日立アプライアンス株式会社 Propeller fan and air conditioner equipped with the same

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Publication number Publication date
KR100724824B1 (en) 2007-06-04
WO2004088210A1 (en) 2004-10-14
KR20050120678A (en) 2005-12-22
ES2332591T3 (en) 2010-02-09
EP1610068B1 (en) 2009-09-16
CN101025281A (en) 2007-08-29
EP1610068A4 (en) 2007-11-21
EP1610068A1 (en) 2005-12-28
CN100343590C (en) 2007-10-17
CN100480591C (en) 2009-04-22
CN1768237A (en) 2006-05-03

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