JP6215296B2 - Propeller fan and air conditioner equipped with the same - Google Patents

Propeller fan and air conditioner equipped with the same Download PDF

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Publication number
JP6215296B2
JP6215296B2 JP2015501179A JP2015501179A JP6215296B2 JP 6215296 B2 JP6215296 B2 JP 6215296B2 JP 2015501179 A JP2015501179 A JP 2015501179A JP 2015501179 A JP2015501179 A JP 2015501179A JP 6215296 B2 JP6215296 B2 JP 6215296B2
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edge portion
propeller fan
curvature
rotation
rotation axis
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JPWO2014128908A1 (en
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岩瀬　拓
拓 岩瀬
岸谷　哲志
哲志 岸谷
篤彦 深澤
篤彦 深澤
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Johnson Controls Hitachi Air Conditioning Technology Hong Kong Ltd
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Johnson Controls Hitachi Air Conditioning Technology Hong Kong Ltd
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    • 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
    • F04D29/386—Skewed blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
    • F24F1/0029—Axial fans
    • 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
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • F04D29/545—Ducts
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/002—Axial flow fans
    • 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
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • 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
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05D2240/304—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the trailing edge of a rotor blade
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/70—Shape
    • F05D2250/71—Shape curved
    • F05D2250/713—Shape curved inflexed

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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)
  • Air-Conditioning Room Units, And Self-Contained Units In General (AREA)

Description

本発明は、プロペラファン及びこれを備えた空気調和機に関する。   The present invention relates to a propeller fan and an air conditioner including the same.

空気調和機などではプロペラファンが多く適用されている。図１３に従来のプロペラファンのプロペラの平面図を示す。図１３はプロペラを吐出し側から見た図である。プロペラはハブの周囲に設けられた複数の翼から構成される。翼は騒音低減を狙いとして、翼を回転方向に前進させる形状（前進翼）が採用されることが多い。前進翼には翼端から流出する翼端渦を小さくする作用があり、騒音を低減する効果がある。   Propeller fans are often used in air conditioners and the like. FIG. 13 shows a plan view of a propeller of a conventional propeller fan. FIG. 13 is a view of the propeller viewed from the discharge side. The propeller is composed of a plurality of wings provided around the hub. In order to reduce noise, the wing often adopts a shape that advances the wing in the rotational direction (forward wing). The forward wing has the effect of reducing the tip vortex flowing out from the tip, and has the effect of reducing noise.

本技術分野の背景技術として、特公平２−２０００（特許文献１）がある。特許文献１には、上述の前進翼における翼の前進の度合いや翼の傾き、翼断面の反りといった形状パラメータを数値限定することによって、大風量化、高静圧化及び騒音の低減ができると記載されている。   As a background art in this technical field, there is Japanese Patent Publication No. 2-2000 (Patent Document 1). In Patent Document 1, it is possible to increase the air volume, increase the static pressure, and reduce noise by numerically limiting the shape parameters such as the degree of blade advancement, blade inclination, and blade section warpage in the above-described forward blade. Have been described.

また、特許第３７４４４８９号（特許文献２）がある。特許文献２には、翼の外周端部を吸込側に反り返らせることによって、翼端渦を小さくすることで騒音を低減することができると記載されている。さらにそのような翼とベルマウスの位置関係を規定することによって、気流とベルマウスとの干渉を抑制して騒音を低減することができると記載されている。   Moreover, there exists patent 3744489 (patent document 2). Patent Document 2 describes that noise can be reduced by reducing the blade tip vortex by causing the outer peripheral end of the blade to warp toward the suction side. Furthermore, it is described that by defining such a positional relationship between the wing and the bell mouth, it is possible to suppress the interference between the airflow and the bell mouth and reduce noise.

更に、特許第４８１８１８４号（特許文献３）がある。特許文献３には、特許文献２とは異なる定義方法で翼を吸込側に反り返らせることによって、翼端渦を翼外周部の内側に移動させ、翼端渦とベルマウスの干渉を防ぎ、騒音低減と高効率化ができると記載されている。   Furthermore, there exists patent 4818184 (patent document 3). In Patent Document 3, the wing tip vortex is moved to the inside of the blade outer periphery by causing the blade to warp to the suction side in a different definition method from Patent Document 2, preventing interference between the blade tip vortex and the bell mouth, It describes that noise reduction and high efficiency can be achieved.

特公平２−２０００JP2000-2000 特許第３７４４４８９号Japanese Patent No. 3744489 特許第４８１８１８４号Japanese Patent No. 4818184

実施例では翼が流れに作用する力を「翼力」と称することとする。図１３には翼が流れに作用する翼力を矢印Ａ’で示す。従来のプロペラファンのプロペラでは、翼が回転方向に前進した形状であるため、翼力は矢印Ａ’のように回転軸６の方向に対して内周方向に向かうように作用する。この内周方向向きの翼力により、流れは内周方向向きの運動量を得るため流れは内周方向向きとなる。   In the embodiment, the force acting on the flow by the blade is referred to as “blade force”. In FIG. 13, the blade force acting on the flow of the blade is indicated by an arrow A '. In the propeller of a conventional propeller fan, since the blade has a shape advanced in the rotation direction, the blade force acts in the inner circumferential direction with respect to the direction of the rotation shaft 6 as indicated by an arrow A '. Due to the blade force in the inner circumferential direction, the flow obtains a momentum in the inner circumferential direction, so that the flow is directed in the inner circumferential direction.

図１４に従来のプロペラファンにおける回転軸６を通る断面に投影した速度ベクトルの模式図を示す。図１４で示すように流れは内周方向向きとなるため、図示していないがプロペラファンの外周を覆うように配置されるベルマウスの近傍には流れが供給されないこととなる。すると、ベルマウス近傍の空気速度が低下する。ベルマウス近傍に流れが供給されないと、翼の出口やベルマウスの出口における速度が不均一となるため、プロペラファンの高効率化においては課題であった。
そこで本発明はプロペラファンの高効率化を図ることを目的とする。FIG. 14 is a schematic diagram of velocity vectors projected on a cross section passing through the rotary shaft 6 in a conventional propeller fan. As shown in FIG. 14, since the flow is directed in the inner circumferential direction, the flow is not supplied in the vicinity of the bell mouth arranged so as to cover the outer periphery of the propeller fan, although not shown. As a result, the air velocity in the vicinity of the bell mouth decreases. If the flow is not supplied in the vicinity of the bell mouth, the speed at the exit of the wing and the exit of the bell mouth becomes non-uniform, which is a problem in improving the efficiency of the propeller fan.
Therefore, an object of the present invention is to improve the efficiency of the propeller fan.

上記課題を解決するために、例えば特許請求の範囲に記載の構成を採用する。
本願は上記課題を解決する手段を複数含んでいるが、その一例を挙げるならば、回転中心となる回転軸と、該回転軸の周囲に設けられた複数の翼と、を備え、前記複数の翼の外周方向外側にベルマウスが配置されるプロペラファンにおいて、前記複数の翼のそれぞれは、回転方向に対して後方に形成される後縁部と、回転方向に対して前方に形成される前縁部と、該後縁部の外周方向の先端部から前縁部の外周方向の先端部に向かって形成される翼端部と、から形成され、前記回転軸を通る平面に回転投影した子午面における前記後縁部は、前記回転軸から前記翼端部に向かって、吸込み側から吐出し側に、第１の曲率により曲がるように形成され、さらに、変曲点を介して、前記第１の曲率よりも小さい第２の曲率により曲がるように形成されることを特徴とする。
In order to solve the above problems, for example, the configuration described in the claims is adopted.
The present application includes a plurality of means for solving the above-described problems. For example, the present application includes a rotation shaft serving as a rotation center and a plurality of blades provided around the rotation shaft, In the propeller fan in which a bell mouth is disposed on the outer circumferential direction of the wing, each of the plurality of wings includes a rear edge portion formed rearward with respect to the rotation direction and a front edge formed with respect to the rotation direction. A meridian formed by rotation and projected onto a plane passing through the rotation axis, and a wing tip formed from an outer edge of the rear edge to an outer edge of the front edge. The trailing edge of the surface is formed to bend with a first curvature from the suction side to the discharge side from the rotating shaft toward the blade tip, and further, through the inflection point, the first Formed to bend with a second curvature smaller than the curvature of 1 Characterized in that it is.

また、上記構成において、前記ベルマウスの前記翼に最も近い端面において、吐出し方向の端部で、かつ、外周方向に角度が変わる位置が、前記変曲点の位置と回転面上からみてほぼ一致することが望ましい。
また、上記構成において、前記回転軸に垂直な平面に投影した前記後縁部は、前記回転軸から前記翼端部に向かって、反回転方向に凸状に形成され、さらに変曲点を介して、直線状もしくは回転方向に凸状に形成されることが望ましい。 Further, in the above configuration, at the end face closest to the wing of the bell mouth, the position at which the angle changes in the discharge direction and in the outer circumferential direction is substantially as seen from the position of the inflection point and the rotation surface. It is desirable to match.
In the above configuration, the trailing edge portion projected onto a plane perpendicular to the rotation axis is formed in a convex shape in the counter-rotation direction from the rotation axis toward the blade tip portion, and further via an inflection point. Thus, it is desirable to form a straight line or a convex shape in the rotational direction.

また、上記構成において、前記複数の翼のそれぞれは、前記後縁部のうちの前記第１の曲率で形成される部位には、前記回転軸方向に対して外周方向に向かうように翼力が作用するとともに、前記後縁部のうちの前記第２の曲率で形成される部位には、前記回転軸方向に対して内周方向に向かうように翼力が作用することが望ましい。
また、上記構成において、前記翼の吐出し側に空気を通すとともに所定の大きさ以上の異物混入を防止し、プロペラとの距離を所定の長さ以上に離れたガードを備えることが望ましい。
さらに、空気の吸込口及び吹出口を有する筐体と、該筐体内に配置された熱交換器と、該熱交換器の上流側または下流側に配置され、筐体外部の空気を前記吸込口より吸い込み、前記吹出口から吹き出すファンと、を備えた空気調和機において、該ファンに、上記した構成のうちの何れかに記載のプロペラファンを用いることが望ましい。

Further, in the above-described configuration, each of the plurality of blades has a blade force at a portion formed by the first curvature in the rear edge portion so as to go in the outer circumferential direction with respect to the rotation axis direction. While acting, it is desirable that a blade force acts on a portion formed by the second curvature of the rear edge portion so as to be directed in an inner circumferential direction with respect to the rotation axis direction.
Further, in the above configuration, it is desirable to provide a guard that allows air to pass through the discharge side of the blade and prevents contamination of foreign matters of a predetermined size or more and that is separated from the propeller by a predetermined length or more.
Further, a housing having an air inlet and an air outlet, a heat exchanger disposed in the housing, and an upstream or downstream side of the heat exchanger, the air outside the housing is drawn into the suction port In an air conditioner provided with a fan that sucks more and blows out from the air outlet, it is desirable to use the propeller fan according to any one of the above-described configurations for the fan.

本発明によれば、プロペラファンの高効率化を実現することができる。   According to the present invention, high efficiency of the propeller fan can be realized.

実施例１のプロペラファンの回転軸を通る平面の断面図Sectional drawing of the plane which passes along the rotating shaft of the propeller fan of Example 1 実施例１のプロペラファンと従来例のプロペラファンにおける翼力の違いを説明する図The figure explaining the difference in the blade force in the propeller fan of Example 1, and the propeller fan of a prior art example 実施例１のプロペラファンにおける回転軸を通る断面に投影した速度ベクトルの模式図Schematic diagram of the velocity vector projected on the cross section passing through the rotation axis in the propeller fan of Example 1 実施例２のプロペラファンの回転軸を通る平面の断面図Sectional drawing of the plane which passes along the rotating shaft of the propeller fan of Example 2 実施例２のプロペラファンにおける回転軸を通る断面に投影した速度ベクトルの模式図Schematic diagram of the velocity vector projected on the cross section passing through the rotation axis in the propeller fan of Example 2 実施例２におけるプロペラファンと従来のプロペラファンの軸動力の比較の一例Example of comparison of shaft power between propeller fan and conventional propeller fan in Example 2 実施例２において図４とは異なる形状のベルマウスとの組み合わせを示す図The figure which shows the combination with the bell mouth of the shape different from FIG. 4 in Example 2. 実施例２において図４とは異なる形状のベルマウスとの組み合わせを示す図The figure which shows the combination with the bell mouth of the shape different from FIG. 4 in Example 2. 実施例３におけるプロペラの平面図である。6 is a plan view of a propeller in Example 3. FIG. 実施例４におけるプロペラファンの図Figure of propeller fan in Example 4 実施例４におけるプロペラファンと従来のプロペラファンの騒音の比較の一例Example of comparison of noise between propeller fan in embodiment 4 and conventional propeller fan 実施例５における空気調和機の断面図Sectional drawing of the air conditioner in Example 5 従来のプロペラファンのプロペラの平面図Top view of conventional propeller fan propeller 従来のプロペラファンにおける回転軸を通る断面に投影した速度ベクトルの模式図Schematic diagram of velocity vector projected on a cross section passing through the rotation axis in a conventional propeller fan

以下、本発明の実施例について図面を用いて説明する。   Embodiments of the present invention will be described below with reference to the drawings.

本発明の実施例１を図１から図３を用いて説明する。
図１は実施例１のプロペラファンの回転軸を通る平面の断面図である。１は翼、２はハブ、３は後縁部、４は前縁部、５は翼端部、６は回転中心となる回転軸、Ｘは空気の流れ方向を示す。後縁部３は翼１の回転方向に対して後方に形成され、前縁部４は翼１の回転方向に対して前方に形成される。翼端部５は後縁部３の該周方向の先端部から前縁部４の該周方向の先端部に形成される。A first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a cross-sectional view of a plane passing through the rotation axis of the propeller fan according to the first embodiment. 1 denotes a blade, 2 denotes a hub, 3 denotes a trailing edge, 4 denotes a leading edge, 5 denotes a blade tip, 6 denotes a rotation axis serving as a rotation center, and X denotes an air flow direction. The trailing edge 3 is formed rearward with respect to the rotation direction of the blade 1, and the leading edge 4 is formed forward with respect to the rotation direction of the blade 1. The blade tip 5 is formed from the circumferential tip of the trailing edge 3 to the circumferential tip of the leading edge 4.

図１において後縁部３は回転軸６を通る平面に回転投影したものを示している。後縁部３は回転軸６から翼端部５に向かって、吸込み側から吐出し側に、第１の曲率αにより曲がるように形成される。さらに変曲点７を介して、第１の曲率αよりも小さい第２の曲率βにより曲がるように形成される。   In FIG. 1, the rear edge portion 3 shows a rotational projection onto a plane passing through the rotation axis 6. The trailing edge 3 is formed from the rotating shaft 6 toward the blade tip 5 so as to bend from the suction side to the discharge side with the first curvature α. Further, it is formed so as to bend with a second curvature β smaller than the first curvature α via the inflection point 7.

図２は実施例１のプロペラファンと従来例のプロペラファンにおける翼力の違いを説明する図である。図２はプロペラファンを吐出し側斜め方向より見た図である。Ａは実施例１のプロペラファンの後縁部３における第２の曲率βの部分３ｂが作用する翼力を示す。Ａ’は従来例のプロペラファンの翼端部５’側の後縁部３ｂ’が作用する翼力を示す。Ｙは翼の回転方向を示す。   FIG. 2 is a diagram for explaining a difference in blade force between the propeller fan of the first embodiment and the propeller fan of the conventional example. FIG. 2 is a view of the propeller fan as viewed from an oblique side. A shows the blade force which the part 3b of the 2nd curvature (beta) in the trailing edge part 3 of the propeller fan of Example 1 acts. A 'represents the blade force acting on the trailing edge 3b' on the blade tip 5 'side of the propeller fan of the conventional example. Y indicates the direction of rotation of the wing.

本実施例のプロペラファンの翼１は、上述の構成となっているため、翼力Ａは回転軸６の方向に対して外周方向に向かうように作用する。そのため後縁部３ｂ付近の流れは部分的に回転軸６の方向に対して外周方向に向かうような運動量を得ることとなる。他方、従来のプロペラファンの翼力Ａ’は回転軸６の方向に対して内周方向に向かうように作用する。そのため翼間の流れは回転軸６の方向に対して内周方向に向かうような運動量を得る。   Since the blade 1 of the propeller fan according to the present embodiment has the above-described configuration, the blade force A acts toward the outer peripheral direction with respect to the direction of the rotating shaft 6. For this reason, the flow in the vicinity of the rear edge 3b partially obtains a momentum that goes in the outer circumferential direction with respect to the direction of the rotation shaft 6. On the other hand, the blade force A ′ of the conventional propeller fan acts in the inner circumferential direction with respect to the direction of the rotating shaft 6. Therefore, the flow between the blades obtains a momentum that goes in the inner circumferential direction with respect to the direction of the rotating shaft 6.

図１４に従来のプロペラファンにおける回転軸を通る断面に投影した速度ベクトルの模式図を示す。図２における回転軸６の方向に対して内周方向に向かう翼力Ａ’により、図１４の流れＴは内周方向に向かう運動量を得るため内周方向向きとなる。したがって、図示していないがプロペラファンの外周方向を覆うように配置されるベルマウスの近傍には流れが供給されず、ベルマウス近傍の速度が低下する。ベルマウス近傍に流れが供給されないことは、すなわち、流れＵのように滞ることになる。するとベルマウス近傍の流れＵと流れＴとで翼の出口側における速度が不均一となるものであり、効率低下の要因となり得る。   FIG. 14 is a schematic diagram of a velocity vector projected on a cross section passing through the rotation axis in a conventional propeller fan. Due to the blade force A 'directed in the inner circumferential direction with respect to the direction of the rotating shaft 6 in FIG. 2, the flow T in FIG. 14 is directed in the inner circumferential direction in order to obtain a momentum in the inner circumferential direction. Accordingly, although not shown, no flow is supplied to the vicinity of the bell mouth arranged so as to cover the outer peripheral direction of the propeller fan, and the speed near the bell mouth is reduced. The fact that no flow is supplied in the vicinity of the bellmouth means that the flow U is stagnant. Then, the flow U and the flow T in the vicinity of the bell mouth become non-uniform in speed on the exit side of the blade, which may cause a reduction in efficiency.

図３に実施例１のプロペラファンにおける回転軸を通る断面に投影した速度ベクトルの模式図を示す。図２における翼力Ａの作用によって、図３の流れＳのように、翼端部５付近の流れが回転軸６に対して外周方向に向かうようになる。すなわち、本実施例の後縁部３の形状によれば後縁部３のうちの第１の曲率αで形成される部位には、回転軸６の方向に対して外周方向に向かうように翼力Ａが作用するとともに、後縁部３のうちの第２の曲率βで形成される部位には、回転軸６の方向に対して内周方向に向かうように翼力が作用するものである。   FIG. 3 is a schematic diagram of velocity vectors projected on a cross section passing through the rotation axis in the propeller fan of the first embodiment. Due to the action of the blade force A in FIG. 2, the flow in the vicinity of the blade tip 5 is directed toward the outer periphery with respect to the rotating shaft 6 as in the flow S in FIG. That is, according to the shape of the trailing edge portion 3 of the present embodiment, a portion of the trailing edge portion 3 formed with the first curvature α is directed to the outer peripheral direction with respect to the direction of the rotating shaft 6. While the force A acts, the blade force acts on the portion formed by the second curvature β in the rear edge portion 3 so as to be directed in the inner circumferential direction with respect to the direction of the rotation shaft 6. .

その結果、従来はベルマウス近傍において図１４に示したように流れが供給されず流れＵのように滞ることがあったのに対し、翼力Ａの作用により従来のような流れＵが生じる事態を抑制することができる。したがって、翼出口付近の速度が均一化されることができ翼後流の混合損失が低減するため、効率を増加することが可能となる。   As a result, in the prior art, the flow was not supplied in the vicinity of the bell mouth as shown in FIG. Can be suppressed. Accordingly, the speed in the vicinity of the blade outlet can be made uniform, and the mixing loss of the blade wake can be reduced, so that the efficiency can be increased.

本実施例では、実施例１を更に高効率化できる実施例について図４から図８を用いて説明する。
図４は実施例２のプロペラファンの回転軸を通る平面の断面図である。８はベルマウス、９は円筒部、１０はベルマウスの端部を示す。円筒部９はベルマウス８の一部分であって、所定のクリアランスを介して、翼１を覆っている。端部１０は円筒部９の吐出し側の端部で、図１においては外周方向に直角に角度が変わる位置とし、端部１０を変曲点７と回転面上からみて一致して配置させる。In the present embodiment, an embodiment that can further improve the efficiency of the first embodiment will be described with reference to FIGS.
FIG. 4 is a cross-sectional view of a plane passing through the rotation axis of the propeller fan according to the second embodiment. 8 indicates a bell mouth, 9 indicates a cylindrical portion, and 10 indicates an end portion of the bell mouth. The cylindrical portion 9 is a part of the bell mouth 8 and covers the wing 1 through a predetermined clearance. The end portion 10 is an end portion on the discharge side of the cylindrical portion 9, and in FIG. 1, the end portion 10 is located at a position where the angle changes at a right angle to the outer circumferential direction, and the end portion 10 is arranged to coincide with the inflection point 7 when viewed from the rotation surface. .

つまりベルマウス８の翼１に最も近い端面において、吐出し方向の端部１０で、かつ、外周方向に角度が変わる位置が、変曲点７の位置と回転面上からみてほぼ一致するようにしている。これによりベルマウス８の翼１に最も近い端面において、吐出し方向の端部１０で、かつ、外周方向に角度が変わる位置が、外向きの翼力Ａを作用する部分と外向きの翼力Ａを作用しない部分の境界となる位置と、回転面上からみてほぼ一致する。   That is, at the end face closest to the wing 1 of the bell mouth 8, the position of the end portion 10 in the discharge direction and the angle changing in the outer peripheral direction is made to substantially coincide with the position of the inflection point 7 when viewed from the rotation surface. ing. As a result, at the end face closest to the wing 1 of the bell mouth 8, the position where the angle changes in the outer circumferential direction at the end portion 10 in the discharge direction is the portion where the outward wing force A acts and the outward wing force. It substantially coincides with the position that becomes the boundary of the portion where A does not act as seen from the surface of rotation.

図５に実施例２のプロペラファンにおける回転軸を通る断面に投影した速度ベクトルの模式図を示す。端部１０と変曲点７をほぼ一致して配置させているため、実施例１における図２で示した矢印Ａ方向の翼力の作用により均一化された速度分布が、円筒部９により流れが拡散されずに保持される。そのため実施例１の作用効果をさらに確実に得ることができ、プロペラファンの効率を増加することができる。   FIG. 5 is a schematic diagram of velocity vectors projected on a cross section passing through the rotation axis in the propeller fan of the second embodiment. Since the end portion 10 and the inflection point 7 are arranged substantially coincident with each other, the velocity distribution made uniform by the action of the blade force in the direction of arrow A shown in FIG. Is retained without being diffused. Therefore, the operational effects of Example 1 can be obtained more reliably, and the efficiency of the propeller fan can be increased.

図６に実施例２におけるプロペラファンと従来のプロペラファンの軸動力の比較結果を示す。動作点付近において、実施例２のプロペラファンの消費電力は、従来のプロペラファンに比べて３．３％の省エネ化すなわち高効率化が得られている。   FIG. 6 shows a comparison result of shaft power between the propeller fan in Example 2 and the conventional propeller fan. In the vicinity of the operating point, the power consumption of the propeller fan of the second embodiment is 3.3% energy saving, that is, higher efficiency than the conventional propeller fan.

図７及び図８に実施例２において図４とは異なる形状のベルマウスとの組み合わせを示す図である。図７のベルマウスは円筒部９の吐出し側は円弧状となっている。この場合、端部１０ａは円筒部９の直線と円弧の接点となる。図８のベルマウスは円筒部９の吐出し側は円錐状のテーパーとなっている。この場合、端部１０ｂは円筒部９の直線と円錐状のテーパーとの接点となる。図示のように端部１０ａ及び１０ｂを変曲点７と回転面上からみて一致して配置させる。本発明で得られる作用効果は、図７及び図８のいずれのベルマウスにおいても図４のベルマウスと同様の効果を得ることができる。   7 and 8 are diagrams showing a combination with a bell mouth having a shape different from that in FIG. 4 in the second embodiment. In the bell mouth of FIG. 7, the discharge side of the cylindrical portion 9 has an arc shape. In this case, the end portion 10a becomes a contact point between the straight line of the cylindrical portion 9 and the circular arc. The bell mouth of FIG. 8 has a conical taper on the discharge side of the cylindrical portion 9. In this case, the end portion 10b serves as a contact point between the straight line of the cylindrical portion 9 and the conical taper. As shown in the drawing, the end portions 10a and 10b are arranged so as to coincide with the inflection point 7 when viewed from the rotation surface. The effects obtained by the present invention can be the same as those of the bell mouse of FIG. 4 in any of the bell mice of FIGS.

本実施例では、実施例１又は実施例２を更に高効率化できる実施例について図９と図１０を用いて説明する。
図９は実施例３におけるプロペラの平面図である。図９はプロペラを吐出し側から見た図である。図９では後縁部３は回転軸に垂直な平面に投影されている。後縁部３は、ハブ２から翼端部５に向かって、反回転方向に凸状に形成され、変曲点１８を介して、回転方向に凸状となるように形成される。Ｂはハブ２側の後縁部３ｈ付近が作用する翼力、Ｃは翼端部５側の後縁部３ｔ付近が作用する翼力を示す。変曲点１８は実施例１及び２で述べた変曲点７と同一の半径とすることが望ましい。In the present embodiment, an embodiment that can further improve the efficiency of the first or second embodiment will be described with reference to FIGS. 9 and 10.
FIG. 9 is a plan view of the propeller according to the third embodiment. FIG. 9 is a view of the propeller viewed from the discharge side. In FIG. 9, the trailing edge 3 is projected on a plane perpendicular to the rotation axis. The trailing edge portion 3 is formed in a convex shape in the counter-rotating direction from the hub 2 toward the blade tip portion 5, and is formed in a convex shape in the rotating direction via the inflection point 18. B represents the blade force acting near the rear edge 3h of the hub 2 side, and C represents the blade force acting near the rear edge 3t on the blade tip 5 side. It is desirable that the inflection point 18 has the same radius as the inflection point 7 described in the first and second embodiments.

変曲点１８を境として、後縁部３ｔの曲率が変化したために、翼力Ｃは翼力Ｂに比べて回転軸６の方向に対して外周方向に向きが変わる。この翼力の向きの変化によって、後縁部３ｔ付近の流れは外周方向向きの運動量を得、翼端部５付近の流れが外周方向向きとなる。その結果、翼出口付近の速度が均一化される。速度の均一化により翼後流の混合損失が低減するため、効率が増加する。   Since the curvature of the trailing edge 3t has changed at the inflection point 18, the blade force C changes its direction in the outer circumferential direction relative to the direction of the rotary shaft 6 compared to the blade force B. Due to this change in the direction of the blade force, the flow in the vicinity of the trailing edge 3t obtains a momentum in the outer circumferential direction, and the flow in the vicinity of the blade tip 5 becomes in the outer circumferential direction. As a result, the speed near the blade outlet is made uniform. The efficiency is increased because the mixing loss of the wake of the blade is reduced by the uniform speed.

なお、図９では後縁部３ｔは回転方向に凸状となるように形成されているが、後縁部３ｔの曲率が、変曲点１８を介して後縁部３ｈに対して大きくなる方向に、さらには直線状に変化させることにより、上記で述べた同様の作用を得ることができる。   In FIG. 9, the trailing edge 3 t is formed to be convex in the rotational direction, but the curvature of the trailing edge 3 t is larger than the trailing edge 3 h via the inflection point 18. Furthermore, the same effect | action mentioned above can be acquired by changing to linear form further.

本実施例では、実施例１から３の高効率化に加えて、低騒音化の効果も得ることができる実施例について、図１０と図１１を用いて説明する。
図１０は実施例４におけるプロペラファンの図である。図１０は実施例１から３のプロペラファンの翼の後流側にガードを配置したものである。このガードは、翼の吐出し側に空気を通すように桟状や網状に形成されるものであり、この桟や網の隙間によって所定の大きさ以上の異物混入を防止するものである。実施例１から３のプロペラファンの翼出口付近の速度は従来のプロペラファンに比べて均一化されている。流れによる騒音は流速の６乗に比例するため、ガード１１から発生する騒音は、速度が局所的に大きい場合には、その部分から発生する騒音が支配的となる。そのため速度が均一化された本実施例３においては、従来のプロペラファンとの組み合わせに比べて騒音が低減する。In the present embodiment, in addition to the high efficiency of the first to third embodiments, an embodiment capable of obtaining the effect of reducing noise will be described with reference to FIGS. 10 and 11.
FIG. 10 is a diagram of the propeller fan in the fourth embodiment. FIG. 10 shows a case where a guard is disposed on the wake side of the blades of the propeller fans of the first to third embodiments. The guard is formed in a cross shape or a net shape so as to allow air to pass through to the discharge side of the wing, and a foreign matter having a predetermined size or more is prevented by the gap between the cross and the net. The speeds near the blade outlets of the propeller fans of Examples 1 to 3 are made uniform as compared with the conventional propeller fan. Since the noise caused by the flow is proportional to the sixth power of the flow velocity, the noise generated from the guard 11 is dominant when the speed is locally high. Therefore, in the third embodiment in which the speed is made uniform, noise is reduced as compared with a combination with a conventional propeller fan.

図１１に実施例３におけるプロペラファンと従来のプロペラファンの騒音の比較の一例を示す。実施例３におけるプロペラファンの騒音は従来のプロペラファンに比べて約１ｄＢ低減することが確認されている。   FIG. 11 shows an example of noise comparison between the propeller fan in the third embodiment and the conventional propeller fan. It has been confirmed that the noise of the propeller fan in Example 3 is reduced by about 1 dB compared to the conventional propeller fan.

なお、このガード１１の桟や網の隙間には大人の指が入らないように所定の大きさ以下にすることが必要である。さらに子供の指がガード１１の隙間に入った場合にもプロペラ１２に触ることがないようにすることが必要である。そこでガード１１の桟や網の端部から後縁３とガード１１が最も近づく位置１９との距離Ｌが所定の長さ以上にすることにより更なる安全性を確保することができる。子供の指の長さは約５０ｍｍと想定されるので、距離Ｌとしては５０ｍｍ以上を確保するのが望ましい。   It should be noted that the guard 11 needs to have a predetermined size or less so that adult fingers do not enter the gaps between the bars and the net. Furthermore, it is necessary to prevent the propeller 12 from being touched even when a child's finger enters the gap of the guard 11. Therefore, further safety can be ensured by setting the distance L between the rear edge 3 and the position 19 closest to the guard 11 from the end of the crosspiece or net of the guard 11 to a predetermined length or more. Since the length of a child's finger is assumed to be about 50 mm, it is desirable to secure a distance L of 50 mm or more.

本実施例では、実施例１〜４のいずれかの要件を備えたプロペラファンを用いた空気調和機について説明する。
図１２は実施例５における空気調和機の断面図である。この空気調和機は室外機で、図１２において、プロペラ１２はモータ１３、モータ支持台１４に固定、支持されて回転する。プロペラ１２の外周にはベルマウス８を配置する。その下流域にはガード１１を配置する。ユニット１５の内部には、プロペラ１２の上流に熱交換器１６が設置されている。ユニット１５の内部には、圧縮機１７が搭載されている。A present Example demonstrates the air conditioner using the propeller fan provided with the requirements in any one of Examples 1-4.
FIG. 12 is a cross-sectional view of the air conditioner according to the fifth embodiment. This air conditioner is an outdoor unit. In FIG. 12, the propeller 12 is fixed and supported by a motor 13 and a motor support base 14 and rotates. A bell mouth 8 is disposed on the outer periphery of the propeller 12. A guard 11 is disposed in the downstream area. Inside the unit 15, a heat exchanger 16 is installed upstream of the propeller 12. A compressor 17 is mounted inside the unit 15.

この空気調和機は、モータ１３でプロペラ１２を回転させることで、空気を熱交換器１６に吸込、冷却又は過熱された後、プロペラ１２とベルマウス８にて昇圧された後、ガード１１から吐き出す。プロペラファン及びベルマウスには実施例１〜４のいずれかに記載のプロペラファンを用いているため、低騒音・高効率な空気調和機を得ることができる。   In this air conditioner, the propeller 12 is rotated by a motor 13 so that air is sucked into the heat exchanger 16, cooled or overheated, then pressurized by the propeller 12 and the bell mouth 8, and then discharged from the guard 11. . Since the propeller fan described in any of Examples 1 to 4 is used for the propeller fan and the bell mouth, an air conditioner with low noise and high efficiency can be obtained.

なお、本実施例では室外機について説明したが、空気調和機は他の型式でも、室内機でも、プロペラファンを用いるものであれば本発明は共通して使用できる技術である。   Although the outdoor unit has been described in the present embodiment, the present invention is a technique that can be used in common as long as the air conditioner uses another type or an indoor unit and uses a propeller fan.

１、１’ 翼
２、２’ ハブ
３、３’、３ｔ、３ｈ 後縁部
４、４’ 前縁部
５、５’ 翼端部
６、６’ 回転中心
７ 変曲点
８ ベルマウス
９ 円筒部
１０、１０ａ、１０ｂ 端部
１１ ガード
１２ プロペラ
１３ モータ
１４ モータ支持台
１５ ユニット
１６ 熱交換器
１７ 圧縮機
１８ 変曲点
１９ ガード１１の桟や網の端部から後縁３とガード１１が最も近づく位置
Ａ、Ａ’ 翼力
Ｂ 翼力
Ｃ 翼力
Ｌ 距離
Ｓ 流れ
Ｔ 流れ
Ｕ 流れ
Ｘ 空気の流れ方向
Ｙ 回転方向
α 第１の曲率
β 第２の曲率1, 1 'wing 2, 2' hub 3, 3 ', 3t, 3h trailing edge 4, 4' leading edge 5, 5 'wing tip 6, 6' rotation center 7 inflection point 8 bellmouth 9 cylinder 10, 10 a, 10 b End 11 Guard 12 Propeller 13 Motor 14 Motor support 15 Unit 16 Heat exchanger 17 Compressor 18 Inflection point 19 The rear edge 3 and the guard 11 are the most from the end of the guard 11 bar or net. Approaching position A, A ′ Blade force B Blade force C Blade force L Distance S Flow T Flow U Flow X Air flow direction Y Rotational direction α First curvature β Second curvature

Claims (6)

回転中心となる回転軸と、
該回転軸の周囲に設けられた複数の翼と、を備え、
前記複数の翼の外周方向外側にベルマウスが配置されるプロペラファンにおいて、
前記複数の翼のそれぞれは、
回転方向に対して後方に形成される後縁部と、回転方向に対して前方に形成される前縁部と、該後縁部の外周方向の先端部から前縁部の外周方向の先端部に向かって形成される翼端部と、から形成され、
前記回転軸を通る平面に回転投影した子午面における前記後縁部は、前記回転軸から前記翼端部に向かって、吸込み側から吐出し側に、第１の曲率により凸状に曲がるように形成され、さらに、変曲点を介して、前記第１の曲率よりも小さい第２の曲率により凸状に曲がるように形成されること、を特徴とするプロペラファン。 A rotation axis as a center of rotation;
A plurality of wings provided around the rotating shaft,
In the propeller fan in which a bell mouth is disposed on the outer periphery side of the plurality of wings,
Each of the plurality of wings is
A rear edge portion formed rearward with respect to the rotation direction, a front edge portion formed forward with respect to the rotation direction, and a front edge portion in the outer peripheral direction of the front edge portion from the front end portion in the outer peripheral direction of the rear edge portion A wing tip formed toward the
The trailing edge portion of the meridional surface that is rotationally projected onto a plane passing through the rotation axis is bent in a convex shape with a first curvature from the suction axis toward the wing tip portion from the suction side to the discharge side. A propeller fan, characterized in that the propeller fan is formed so as to be bent in a convex shape with a second curvature smaller than the first curvature via an inflection point. 回転中心となる回転軸と、
該回転軸の周囲に設けられた複数の翼と、を備え、
前記複数の翼の外周方向外側にベルマウスが配置されるプロペラファンにおいて、
前記複数の翼のそれぞれは、
回転方向に対して後方に形成される後縁部と、回転方向に対して前方に形成される前縁部と、該後縁部の外周方向の先端部から前縁部の外周方向の先端部に向かって形成される翼端部と、から形成され、
前記回転軸を通る平面に回転投影した前記後縁部は、前記回転軸から前記翼端部に向かって、吸込み側から吐出し側に、第１の曲率により曲がるように形成され、さらに、変曲点を介して、前記第１の曲率よりも小さい第２の曲率により曲がるように形成され、
前記ベルマウスの前記翼に最も近い端面において、吐出し方向の端部で、かつ、外周方向に角度が変わる位置が、前記変曲点の位置と回転面上からみてほぼ一致すること、を特徴とするプロペラファン。 A rotation axis as a center of rotation;
A plurality of wings provided around the rotating shaft,
In the propeller fan in which a bell mouth is disposed on the outer periphery side of the plurality of wings,
Each of the plurality of wings is
A rear edge portion formed rearward with respect to the rotation direction, a front edge portion formed forward with respect to the rotation direction, and a front edge portion in the outer peripheral direction of the front edge portion from the front end portion in the outer peripheral direction of the rear edge portion A wing tip formed toward the
The trailing edge portion that is rotationally projected onto a plane passing through the rotating shaft is formed so as to bend with a first curvature from the suction side to the discharge side from the rotating shaft toward the blade tip portion. Formed through a point of curvature with a second curvature smaller than the first curvature,
In the end face closest to the wing of the bell mouth, the position in the discharge direction and the position where the angle changes in the outer peripheral direction substantially coincides with the position of the inflection point when viewed from the rotation surface. Propeller fan. 請求項１において、
前記回転軸に垂直な平面に投影した前記後縁部は、前記回転軸から前記翼端部に向かって、反回転方向に凸状に形成され、さらに変曲点を介して、直線状に形成されること、を特徴とするプロペラファン。 In claim 1,
The trailing edge portion projected onto a plane perpendicular to the rotation axis is formed in a convex shape in the counter-rotation direction from the rotation axis toward the blade tip, and further formed in a straight line via an inflection point. Propeller fan, characterized by 請求項１〜３の何れかにおいて、
前記複数の翼のそれぞれは、
前記後縁部のうちの前記第１の曲率で形成される部位には、前記回転軸方向に対して外周方向に向かうように翼力が作用するとともに、
前記後縁部のうちの前記第２の曲率で形成される部位には、前記回転軸方向に対して内周方向に向かうように翼力が作用することを特徴とするプロペラファン。 In any one of Claims 1-3,
Each of the plurality of wings is
A wing force acts on the portion formed by the first curvature of the rear edge portion so as to go to the outer peripheral direction with respect to the rotation axis direction, and
A propeller fan characterized in that a blade force acts on a portion of the rear edge portion formed by the second curvature so as to be directed in an inner circumferential direction with respect to the rotation axis direction. 請求項１〜４の何れかにおいて、
前記翼の吐出し側に空気を通すとともに所定の大きさ以上の異物混入を防止し、プロペラとの距離を所定の長さ以上に離れたガードを備えることを特徴とするプロペラファン。 In any one of Claims 1-4,
A propeller fan characterized by comprising a guard that allows air to pass through the discharge side of the blades and prevents foreign substances having a predetermined size or more from being mixed, and is separated from the propeller by a predetermined length or more. 空気の吸込口及び吹出口を有する筐体と、
該筐体内に配置された熱交換器と、
該熱交換器の上流側または下流側に配置され、筐体外部の空気を前記吸込口より吸い込み、前記吹出口から吹き出すファンと、を備えた空気調和機において、
該ファンに、請求項１から４の何れかに記載のプロペラファンを用いたことを特徴とする空気調和機。 A housing having an air inlet and an air outlet;
A heat exchanger disposed in the housing;
In an air conditioner comprising: a fan arranged on the upstream side or the downstream side of the heat exchanger, sucking air outside the housing from the suction port, and blowing out from the blowout port,
An air conditioner using the propeller fan according to any one of claims 1 to 4 as the fan.
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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017130273A1 (en) * 2016-01-25 2017-08-03 三菱電機株式会社 Outdoor machine and air conditioner provided with same
JP6849366B2 (en) 2016-09-29 2021-03-24 山洋電気株式会社 Reversible flow fan
JP2018115807A (en) * 2017-01-18 2018-07-26 日立ジョンソンコントロールズ空調株式会社 Outdoor unit for air conditioner
CN110914553B (en) * 2017-08-14 2021-02-19 三菱电机株式会社 Impeller, blower and air conditioner
JP6988397B2 (en) 2017-11-16 2022-01-05 日本電産株式会社 Axial fan
CN111656019B (en) * 2018-02-02 2022-05-17 三菱电机株式会社 Axial flow blower
WO2022249270A1 (en) * 2021-05-25 2022-12-01 日立ジョンソンコントロールズ空調株式会社 Propeller fan and air conditioner

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2212041A (en) * 1939-06-08 1940-08-20 Iig Electric Ventilating Compa Fan wheel
US2578806A (en) * 1949-06-04 1951-12-18 Johnson Lawrence Propeller
US4142844A (en) * 1977-05-31 1979-03-06 Allware Agencies Ltd. Fan blade assemblies for box fans
JPS6165096A (en) 1984-09-05 1986-04-03 Mitsubishi Electric Corp Axial flow blade
US5466120A (en) * 1993-03-30 1995-11-14 Nippondenso Co., Ltd. Blower with bent stays
US5730583A (en) * 1994-09-29 1998-03-24 Valeo Thermique Moteur Axial flow fan blade structure
US5616004A (en) * 1995-04-19 1997-04-01 Valeo Thermique Moteur Axial flow fan
JP2000274912A (en) * 1999-03-25 2000-10-06 Mitsubishi Electric Corp Ventilating device for refrigerator
EP1070849B1 (en) * 1999-07-22 2010-03-24 LG Electronics, Inc. Axial flow fan
JP2002257088A (en) * 2001-03-06 2002-09-11 Toshiba Kyaria Kk Axial flow fan
JP3744489B2 (en) * 2002-12-20 2006-02-08 ダイキン工業株式会社 Blower
JP2004301451A (en) * 2003-03-31 2004-10-28 Toshiba Kyaria Kk Outdoor machine for air conditioner
TWI256444B (en) * 2004-05-06 2006-06-11 Sunonwealth Electr Mach Ind Co Air outlet structure for an axial-flow fan
JP2006002584A (en) * 2004-06-15 2006-01-05 Samsung Electronics Co Ltd Propeller fan and air conditioner using the same
JP4662438B2 (en) * 2004-12-01 2011-03-30 東芝キヤリア株式会社 Axial fan, outdoor unit of air conditioner
JP3912418B2 (en) * 2005-08-01 2007-05-09 ダイキン工業株式会社 Axial fan
JP4818184B2 (en) 2007-04-09 2011-11-16 三菱電機株式会社 Propeller fan
JP5396965B2 (en) * 2009-03-30 2014-01-22 ダイキン工業株式会社 Axial blower, air conditioner and ventilator
JP5079063B2 (en) * 2010-08-25 2012-11-21 三菱電機株式会社 Propeller, blower and heat pump device
JP5418538B2 (en) * 2011-04-28 2014-02-19 三菱電機株式会社 Blower
CN202132272U (en) * 2011-07-11 2012-02-01 珠海格力电器股份有限公司 Induction cooker and radiator fan thereof
IN2014CN03317A (en) * 2011-11-10 2015-07-03 Mitsubishi Electric Corp

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