WO1997033091A1 - Ventilateur a helice et machine d'exterieur utilisant ce ventilateur pour des climatiseurs - Google Patents

Ventilateur a helice et machine d'exterieur utilisant ce ventilateur pour des climatiseurs Download PDF

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Publication number
WO1997033091A1
WO1997033091A1 PCT/JP1996/000540 JP9600540W WO9733091A1 WO 1997033091 A1 WO1997033091 A1 WO 1997033091A1 JP 9600540 W JP9600540 W JP 9600540W WO 9733091 A1 WO9733091 A1 WO 9733091A1
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WO
WIPO (PCT)
Prior art keywords
fan
rib
fan blade
ribs
hub
Prior art date
Application number
PCT/JP1996/000540
Other languages
English (en)
Japanese (ja)
Inventor
Ryoji Satoh
Makoto Nagai
Hiroyasu Yoneyama
Yutaka Mori
Masaaki Mochizuki
Yoshihiko Mochizuki
Toshio Otaguro
Original Assignee
Hitachi, Ltd.
Hitachi Shimizu Engineering Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi, Ltd., Hitachi Shimizu Engineering Co., Ltd. filed Critical Hitachi, Ltd.
Priority to JP53164397A priority Critical patent/JP3468529B2/ja
Priority to PCT/JP1996/000540 priority patent/WO1997033091A1/fr
Priority to MYPI96005533A priority patent/MY123770A/en
Publication of WO1997033091A1 publication Critical patent/WO1997033091A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
    • F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
    • 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

Definitions

  • the present invention relates to a propeller fan for air blowing, and is particularly suitable for a propeller fan mainly used for an air conditioner, which is molded integrally with a thinner plate and a smaller amount of resin.
  • Japanese Patent Application Laid-Open No. 5-21598 discloses an example of an airfoil impeller for a blower in which the amount of resin is reduced and the pressure side of the fan blade is maintained in order to maintain low noise. It is described that a plurality of concave portions are provided in the hologram.
  • the thickness of the fan blade must be reduced to increase the rigidity and the ribs. It is desirable to reinforce with such as.
  • providing a rib or the like has an aerodynamic effect on the fluid performance of the fan, and there is a contradictory problem that noise is increased.
  • the fan blade is good for maintaining the low-noise effect of the airfoil due to the thick wall, but requires higher speed rotation and has a large diameter. If a fan is needed, call for a fan blade. It is not sufficient to reduce the amount of resin material by making it thinner, and to make molding easier and more reliable.
  • An object of the present invention is to solve the above-mentioned problems of the prior art, to improve the rigidity not only in the vicinity of the fan base but also in the axial and radial directions of the fan blade, and in spite of the large diameter. Minimizing the sheet thickness improves moldability, shortens molding time and reduces the use of materials that account for a large proportion of the fan production cost, lowers production costs, and reduces noise. It provides the fan.
  • the present invention provides an outdoor unit of an air conditioner using the above-described propeller fan, which is inexpensive but sufficiently suppresses noise generation. Disclosure of the invention
  • the propeller fan of the present invention has a linear width on the suction side of the fan blade, a plurality of circumferential ribs arranged in the circumferential direction, and a circumferential rib protruding in the suction side.
  • a radial rib having a linear width, arranged in the emission direction, and projecting toward the suction surface is provided.
  • the circumferential ribs increase the rigidity of the fan blade against bending in the circumferential direction, and the radial ribs greatly improve the rigidity of the fan blade against bending in the radial direction.
  • the thickness of the fan blade to be formed can be made smaller, the amount of material can be reduced, and the forming time can be reduced. At the same time, by providing the rib on the suction side that does not become the main flow of the flow into the fan, the effect on the flow is small and the generation of noise can be suppressed to a practical level.
  • the thickness of the fan blade and the width of the root of the rib in contact with the fan blades of the circumferential rib and the radial rib are substantially the same, and the circumferential rib and the radial rib are substantially equal in size.
  • make the tip of the rib smaller than the width of the rib The height of the directional and radial ribs is approximately double the thickness of the fan blade.
  • the height of the circumferential rib is formed so as to gradually decrease from the front edge to the rear edge of the fan blade.
  • the circumferential rib itself forms an airfoil, contributing to noise reduction, and the rigidity of the front edge having low rigidity is increased by increasing the rib.
  • the rear edge which has greater rigidity than the front edge, does not actively reinforce the ribs, allowing for a reasonable material distribution.
  • the height of the circumferential rib is formed so as to gradually increase from the front edge to the rear edge of the fan blade.
  • the tips of the circumferential rib and the radial rib are formed in a saw-tooth shape.
  • the size and number of the saw teeth can be changed in accordance with the turbulence of the flow on the suction side of the fan blade, and the noise can be reduced and the fan performance can be improved.
  • the distal ends of the circumferential rib and the radial rib are formed in a comb shape.
  • the size and number of comb teeth are changed in accordance with the turbulence of the flow on the suction side, noise reduction and fan performance are improved, and the saw teeth are formed.
  • the state of the boundary layer of the flow can be changed up to the root of the rib.
  • the propeller of the present invention is provided on the suction side of the fan blade. With the center of the shaft hole as the approximate origin, a plurality of arcs of different radii arranged in a circular direction, and a circumferential rib protruding toward the suction surface, and the shape of the front edge on the suction surface side of the fan blade.
  • a plurality of radial ribs are formed so as to move at a predetermined angle from the leading edge to the trailing edge, and are protruded toward the negative pressure surface.
  • the propeller fan of the present invention is formed as a part of an arc of a predetermined radius having a starting point at a point on a concentric circle of the shaft hole and a normal to the concentric circle of the starting point.
  • a rib point is set on the concentric circle at a predetermined angle from the leading edge to the trailing edge, and the rib is pointed in the same way as the leading edge.
  • a radial rib formed as a part of an arc of a predetermined radius having an approximate origin on the normal line to the concentric circle of the point and projecting toward the suction surface, and a shaft for the shaft on the suction surface side of the fan blade.
  • the center of the hole is substantially the origin, and a plurality of circular ribs with different radii are arranged and a circumferential rib protruding toward the suction surface is provided.
  • the front edge of the fan blade has a shape with good fluid performance, the radial rib having the same shape as the front edge, and the same shape as the outer periphery from the outer periphery of the fan blade.
  • the circumferential rib With the circumferential rib, the rigidity of the fan blade is improved from the inner circumference to the outermost tip. Therefore, the thickness of the fan blade can be made thinner, the formability of the fan blade can be improved, and distortion due to forming can be reduced despite good fluid performance.
  • the suction surface side By setting the suction surface side not to be the main flow of the flow flowing into the fan, large turbulence is not generated with respect to the flow, so that the aerodynamic performance is not impaired.
  • the hub is formed of a synthetic resin having a shaft hole for inserting the rotating shaft of the present invention and a plurality of fan blades provided radially outward on the outer peripheral surface of the hub.
  • the propeller fan with an outer diameter of 300 to 80 mm is arranged on a fan blade with a plate thickness of 1 to 2 mm and a plurality of fan blades on the negative pressure side of the fan blade.
  • the required fan blade thickness of about 1.6 mm or more can be reduced to about 1.5 mm without deteriorating the overall rigidity of the conventional fan blade. And the moldability is good and the price can be reduced.
  • a plurality of ribs are arranged on the suction side and have a height of 2 to 4 mm, so that noise generation can be suppressed to a practical level.
  • the probe fan according to the present invention has a plurality of ribs arranged on the suction side of the fan blade, protruding from the pressure side to the suction side, and a mold for molding the propeller fan with synthetic resin.
  • the molding pressure is controlled based on the value detected by the in-mold pressure sensor for detecting the internal pressure of the mold and the in-mold pressure sensor.
  • the filling pressure during molding can be maintained at the optimum pressure, so that the cooling rate does not delay from the resin inlet to the tip of the fan, and the sink does not occur.
  • the thickness of the fan blade can be further reduced.
  • the rib protrude from the pressure surface side toward the negative pressure surface, the generation of noise can be sufficiently suppressed.
  • a hub having a shaft hole for inserting the rotating shaft, and a plurality of fan blades radially provided outward on the outer peripheral surface of the hub, and the rotating shaft is arranged in a substantially vertical direction.
  • An outdoor unit of an air conditioner using a propeller fan provided with a plurality of ribs arranged on the suction side of the fan blade and protruding from the pressure side toward the suction side, and the rib is attached to the outdoor unit. It is arranged almost downward so as to face the inside of the unit.
  • the flow direction of the wind is from the bottom to the top, and the refrigeration capacity is large, and the size of the heat exchanger fan is large. Addition can be suppressed.
  • the hub has a shaft hole for inserting the rotating shaft, and a plurality of fan blades radially provided on the outer peripheral surface of the hub toward the outside, and the rotating shaft is arranged in a substantially horizontal direction.
  • a guard provided in the wind outflow direction with respect to the propeller fan and a plurality of fan blades are disposed on the suction side of the fan blades.
  • the rib has a rib projecting from the pressure surface side toward the negative pressure surface, and the guard includes the propeller fan whose surface without the rib faces the rib.
  • the propeller fan according to the present invention has a plurality of fan blades arranged on the suction surface side of the fan blade in a ring shape from the pressure surface side to the suction surface direction and having a height of approximately 2 mm of the thickness of the fan blade. Equivalent to a double, with a protruding circular rib.
  • the propeller fan according to the present invention is arranged such that a plurality of the fan blades are arranged on the suction surface side in a circular manner from the pressure surface side to the suction surface direction, and the width of the ring is the thickness of the fan blade.
  • the first circular rib is substantially the same as the first circular rib, and the second circular rib has a smaller circular radius than the first circular rib. This makes it possible to achieve a propeller fan that can be further optimized, uses less material, and has low noise compared to the above.
  • FIG. 1 is a front view showing an embodiment of the propeller fan of the present invention
  • FIG. 2 is a sectional view taken along line AA in FIG. 1
  • FIG. 3 is a sectional view taken along line B in FIG.
  • Figure 4 is an explanatory diagram of the cascade and the speed vector.
  • FIG. 5 is a perspective view showing an outdoor unit of a top flow unit type
  • FIG. 6 is a perspective view showing an outdoor unit of a side flow unit type.
  • Fig. 7 is a line graph showing the measurement results of the noise level when a synthetic resin probe with ribs is applied to an outdoor unit
  • Fig. 8 is also a frequency analysis result of the noise at the same airflow. Is a line graph showing.
  • FIG. 9 is a block diagram illustrating a method for molding a synthetic oily thin propeller fan with ribs.
  • Fig. 10 is a front view showing an embodiment in which a triangle is formed in the lattice by connecting diagonal lines in one direction of the lattice part of the rib, and
  • Fig. 11 is an implementation of a propeller fan having a circular rib.
  • Fig. 12 is a front view showing an embodiment of a propeller fan composed of large and small circular ribs.
  • Fig. 13 is a front view showing the rib and the front to rear edges. It is a front view which shows how to determine the specific shape of this.
  • Fig. 14 is a perspective view showing an embodiment in which the rib is formed at a constant height from the leading edge to the trailing edge.
  • FIG. 15 is a perspective view of the embodiment in which the height of the circumferential rib is increased from the leading edge to the trailing edge.
  • FIG. 16 is a perspective view showing an embodiment in which a mold is formed.
  • FIG. 16 shows the height of the rib from the front edge to the rear edge.
  • FIG. 17 is a perspective view showing an embodiment in which the radial rib is formed along the streamline direction of the wind.
  • FIG. 18 is a cross-sectional view showing the relationship between the dimension of the rib root and the plate thickness
  • FIG. 19 is a cross-sectional view showing an embodiment in which the tip of the rib is formed in a sawtooth shape, and FIG. FIG.
  • FIG. 21 is a cross-sectional view showing an embodiment in which the tip of the rib is formed in a U-shape.
  • FIG. 21 is a cross-sectional view showing an embodiment in which the tip of the rib is a comb tooth.
  • FIG. It is sectional drawing which shows embodiment formed in inverted U shape.
  • FIG. 1 is a front view showing an embodiment of a propeller fan according to the present invention
  • FIG. 2 is a sectional view taken along line AA
  • FIG. 3 is a sectional view taken along line B of FIG.
  • the thin propeller fan 1 which is mainly made of synthetic resin, has an outer peripheral surface of an annular hub 2 centered on a shaft hole 3 for a motor rotation shaft for inserting a motor rotation shaft for driving. Radially in the radial direction, and obliquely insert a plurality of fan blades 7 with respect to the shaft hole 3 (the angle ⁇ between the shaft hole 3 of the fan blade 7, that is, the axis and the fan blade 7 is 4). Below 0 °, the fan blade 7 is curved as shown in Fig. 2). Further, the annular hub 2 and the pair of fans 1 are integrally injection-molded.
  • reference numerals 4 and 5 denote ribs provided in a circumferential direction and a radial direction. These ribs intersect with each other and are provided in a lattice shape.
  • the rigidity of the fan blade 7 against bending in the front-rear direction and in the radial direction is greatly improved, and the thickness of the fan blade 7 is reduced by an individual grid compared to the conventional fan blade. The thickness can be reduced by the space on the side of the rib formed in the shape.
  • Fig. 4 shows a cascade 10 obtained by cutting a fan 1 as shown in Fig. 1 on a cylindrical surface concentric with a motor shaft shaft hole 3 and developing the cylindrical surface on a two-dimensional plane. Is shown.
  • FIG. 5 is a perspective view showing a top-floor unit-type outdoor unit in which the direction of wind flow is from bottom to top, the refrigeration capacity is large, and the heat exchanger and fan are large.
  • the suction side with the rib of the propeller fan should be placed downward so as to face the inside of the unit 12, that is, the pressure of the fan Surface 8 faces outward with respect to unit By doing so, it is possible to suppress the addition of fan noise due to the ribs due to the directivity of sound and the absorption of sound inside.
  • the girder In the case of an outdoor unit with a side door unit, the girder is opposed to a surface without ribs to suppress the noise generated by the girder and ribs to a practical level. Can be.
  • FIG. Fig. 7 shows the measurement results of the noise level when the synthetic resin propeller with a rib according to the present invention is applied to an outdoor unit, where the horizontal axis represents the rotation speed of the fan and the vertical axis represents the noise. Indicates a level.
  • open circles are synthetic resin propeller fans with ribs according to the present invention, and black circles are those without conventional ribs.
  • Fig. 8 also shows the results of frequency analysis of noise at the same airflow, with the horizontal axis representing frequency and the vertical axis representing noise pressure level at each frequency.
  • the thickness of the fan blade 7 can be reduced, but when molding it, the tip of the fan blade that is far away from the resin injection port is particularly required.
  • the resin becomes difficult to flow due to a delay in the cooling rate of the resin, causing sink marks and the like. Therefore, it is desirable to perform the molding as shown in FIG. 9, and by improving the formability, the thickness of the fan blade can be further reduced and the cost can be reduced. The improvement of the formability will be described below.
  • the negative pressure molding technology is applied, and while measuring the initial pressure during molding in the mold 1 for fan 1 with the in-mold pressure sensor 16, the pressure information is measured by the control device 17.
  • Fill in with synthetic resin while always maintaining the optimum filling pressure. Therefore, the thickness of the fan blade is made thin enough to save the material by providing the rib, and the rib is further reduced from the pressure side. By projecting in the direction of the pressing surface, noise can be sufficiently suppressed, and the fluidity of the resin can be improved.
  • FIG. 10 is a front view showing another embodiment of the propeller fan of FIG. 1, and FIGS. 11, 12, and 13 show still another embodiment. 14, 15, and 16 are detailed perspective views of a rib portion showing still another embodiment.
  • the triangle 23 is formed by connecting diagonal lines in one direction in the grid-shaped rib shown in Fig. 1 with another rib, and the bending rigidity of fan 1 is reduced. It can be significantly improved.
  • Fig. 11 differs from the rib shown in Fig. 1 in that the fan 1 has the same diameter on the entire surface of the fan blade 9 on the suction side 9 and the height is approximately twice the thickness of the fan blade.
  • a plurality of equalized circular ribs 21 are provided.
  • the turbulence of the fluid flowing on the negative pressure side can be controlled by the concave space that is the concave portion in the circular rib 21.
  • the bending rigidity of the fan in the axial center of the fan 1 and in the radial direction is improved, and particularly necessary portions according to the shape of the fan blade surface, for example, the front edge is reinforced and the rear edge is formed. It can be reinforced freely, such as not much.
  • FIG. 12 differs from the first circular rib 21 in which the width of the ring is substantially equal to the thickness of the fan blade and the second circular rib 22 which is smaller than the first circular rib.
  • the turbulence on the suction side of the fan blade and to improve the axial and radial bending stiffness of fan 1 Optimization can be performed including material usage and low noise.
  • Fig. 13 shows how to determine the specific shapes of the rib and the leading edge to the trailing edge.
  • each of the circumferential ribs 4 is arranged with a plurality of circular arcs having different radii with the center of the shaft hole as a substantially origin, and the radius of the circular arc is outside the fan 1.
  • D l it is defined as D l — (n X d), where n is the number of ribs in the circumferential direction and d is the distance between the ribs in the circumferential direction.
  • each radial rib 5 is formed in an arc equal to the curvature R1 of the front edge 19 of the fan 1 so as to be substantially equal to the shape of the front edge, and each arc R1 to
  • a plurality of Rm are arranged as if moving at a predetermined angle from the front edge to the rear edge.
  • the leading edge is formed as a part of an arc of a predetermined radius having a starting point at a point on a concentric circle of the shaft hole and having a substantially origin on a normal to the concentric circle of the starting point.
  • FIG. 14 shows a detailed perspective view of the rib, which is formed at a constant height from the leading edge 19 to the trailing edge 20.
  • Fig. 15 shows that the height of the circumferential rib gradually decreases from the leading edge of Fan 1 to the trailing edge as shown in Fig. 14. It has a tapered shape. Since the circumferential rib itself forms an airfoil, the flow is not disturbed, and the rigidity of the leading edge is strengthened by increasing the height of the rib to increase the strength of the trailing edge. Has the advantage that material distribution is rational in terms of flow and rigidity without actively reinforcing with ribs.
  • Figure 16 shows the height of the ribs gradually increasing from the leading edge 19 to the trailing edge 20.
  • the thickness of fan 1 can be made much thinner than that of the propeller fan without a rib with almost no decrease in fluid performance etc. in any of Figs. 13 to 16 Becomes In Fig. 17, the radial rib 5 is formed so as to follow the streamline direction of the wind (flow from inflow 27 to outflow 28).
  • the flow of the propeller fan is caused by the axial inflow 27 due to the centrifugal force caused by rotation, and the flow 28 during the outflow is bent in the radial direction. The turbulence of the flow is reduced along the line direction.
  • FIG. 18 is a cross-sectional view showing the relationship between the thickness of the fan blade 7 provided with the ribs and the dimensions of the rib bases of the circumferential ribs 4 and the radial ribs 5 and the plate thickness.
  • the thickness of the fan blade is 1.5 mm, and the width of the rib base contacting the fan blades of the circumferential rib and the radial rib is approximately the same, from 1.2 to 1.4 mtn. ⁇ Make the tip of the directional and radial ribs smaller than the width of the rib base, and make the height of the circumferential and radial ribs approximately twice the thickness of the fan blade. mm.
  • the thickness of the fan blade is set to 1 to 2 mm, and the rib protrudes from the pressure side to the negative side.
  • the height should be 2 to 4 mm
  • the width of the rib base where the fan blade contacts the rib should be 1 to 2 mm
  • the width of the rib tip should be 0.6 to 1.6 mm. Is good.
  • the fan blade thickness of the resin-made propeller fan without ribs was required to be about 2.6 mm or more, but without impairing the overall rigidity. It is possible to reduce the thickness to about 5 mm, the material is reduced, the moldability of the fan blade is improved, and resin shrinkage does not occur. It is also desirable from the point of resin molding that the tip of the rib is made smaller than the width of the root of the rib to form a taper. The height of the rib is a value suitable for suppressing the generation of noise to a practical level.
  • FIG. 19 is a cross-sectional view showing the ribs 4 and 5 having the tips formed in a sawtooth shape.
  • the sawtooth 29 allows the turbulence of the fluid flowing on the suction side 9 of the fan blade 7, that is, the boundary layer to be controlled, and responds to the turbulence of the flow on the negative side. By changing the size and number of saw teeth, it is possible to reduce noise and improve fan performance.
  • FIG. 20 shows the saw tooth 29 shown in FIG. 19 in which the tip of the rib is formed by U-shape 30, and FIG. 21 shows that the tip of the rib is formed by the comb tooth 31.
  • the U-shape prevents the fan blades from affecting the flow near the 7th surface, and the comb teeth can be combed according to the turbulence on the suction side.
  • noise can be reduced and fan performance can be improved, and the state of the boundary layer of the flow can be optimized up to the root of the bevel as compared to a saw-toothed one.
  • Fig. 22 shows the tip of a rib formed in an inverted U-shape 32, which makes the flow less turbulent at the tip compared to a rib-shaped rib. Formability can also be improved.
  • the rigidity of the fan blade can be improved by minimizing the effect on the aerodynamic and noise performance, and accordingly, the thickness of the fan blade can be reduced accordingly. It is possible to provide a propeller fan with low production cost and low noise generation, and an outdoor unit of an air conditioner using the same.

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

Abstract

Cette invention se rapporte à un ventilateur à hélice peu bruyant d'un coût de fabrication bas, dans lequel on améliore la rigidité des pales (7) du ventilateur dans les directions axiales et radiales et on réduit l'épaisseur de ces pales autant que possible malgré le grand diamètre du ventilateur, et dans lequel l'aptitude au moulage du matériau du ventilateur est améliorée et le temps de moulage de ce matériau est réduit, et dans lequel on réduit au minimum la quantité utilisée d'un matériau dont le coût entre pour une grande proportion dans le coût de fabrication du ventilateur. Plusieurs arêtes circonférientielles du type plaques (4) s'étendant depuis les faces actives en direction du côté où la pression est négative et plusieurs arêtes radiales (5) s'étendant depuis les faces actives en direction du côté où la pression est négative sont prévues au dos (9) des pales (7) du ventilateur (là où la pression est négative), de sorte que l'épaisseur des pales est réduite, la quantité de matériau utilisée étant ainsi abaissée. Ce faisant, on réduit au minimum l'influence des arêtes sur le flux d'air et on supprime les causes de bruit.
PCT/JP1996/000540 1996-03-06 1996-03-06 Ventilateur a helice et machine d'exterieur utilisant ce ventilateur pour des climatiseurs WO1997033091A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP53164397A JP3468529B2 (ja) 1996-03-06 1996-03-06 プロペラファン
PCT/JP1996/000540 WO1997033091A1 (fr) 1996-03-06 1996-03-06 Ventilateur a helice et machine d'exterieur utilisant ce ventilateur pour des climatiseurs
MYPI96005533A MY123770A (en) 1996-03-06 1996-12-27 Propeller fan and outside unit for air-conditioner using thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1996/000540 WO1997033091A1 (fr) 1996-03-06 1996-03-06 Ventilateur a helice et machine d'exterieur utilisant ce ventilateur pour des climatiseurs

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WO1997033091A1 true WO1997033091A1 (fr) 1997-09-12

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PCT/JP1996/000540 WO1997033091A1 (fr) 1996-03-06 1996-03-06 Ventilateur a helice et machine d'exterieur utilisant ce ventilateur pour des climatiseurs

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JP (1) JP3468529B2 (fr)
MY (1) MY123770A (fr)
WO (1) WO1997033091A1 (fr)

Cited By (5)

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Publication number Priority date Publication date Assignee Title
JP2008223760A (ja) * 2007-02-13 2008-09-25 Daikin Ind Ltd 送風機の羽根車
CN104903584A (zh) * 2012-12-05 2015-09-09 威乐欧洲股份公司 特别是用于废水或污水的离心泵
CN107956716A (zh) * 2017-11-09 2018-04-24 重庆馨艺科技有限公司 一种新型电风扇扇叶
US10539157B2 (en) 2015-04-08 2020-01-21 Horton, Inc. Fan blade surface features
JP2020094549A (ja) * 2018-12-13 2020-06-18 三菱電機株式会社 プロペラファン

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JPS582398U (ja) * 1981-06-30 1983-01-08 日産デイ−ゼル工業株式会社 内燃機関の冷却フアン
JPH0361193U (fr) * 1989-10-18 1991-06-14
JPH03199697A (ja) * 1989-12-28 1991-08-30 Toshiba Corp エアコン用横流ファンおよび横流ファンの製造方法
JPH05340392A (ja) * 1992-06-11 1993-12-21 Matsushita Electric Works Ltd プロペラファン
JPH06108996A (ja) * 1992-09-25 1994-04-19 Toshiba Corp ファン
JPH06137298A (ja) * 1992-10-23 1994-05-17 Aisin Chem Co Ltd ファンのブレード構造
JPH06159297A (ja) * 1992-11-25 1994-06-07 Daikin Ind Ltd 送風機構
JPH06159733A (ja) * 1992-11-18 1994-06-07 Mitsubishi Electric Corp 空気調和機の室外ユニット
JPH06173896A (ja) * 1992-12-04 1994-06-21 Toshiba Corp 送風機および空気調和機の室外ユニット

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Publication number Priority date Publication date Assignee Title
JPS48702U (fr) * 1971-05-24 1973-01-08
JPS582398U (ja) * 1981-06-30 1983-01-08 日産デイ−ゼル工業株式会社 内燃機関の冷却フアン
JPH0361193U (fr) * 1989-10-18 1991-06-14
JPH03199697A (ja) * 1989-12-28 1991-08-30 Toshiba Corp エアコン用横流ファンおよび横流ファンの製造方法
JPH05340392A (ja) * 1992-06-11 1993-12-21 Matsushita Electric Works Ltd プロペラファン
JPH06108996A (ja) * 1992-09-25 1994-04-19 Toshiba Corp ファン
JPH06137298A (ja) * 1992-10-23 1994-05-17 Aisin Chem Co Ltd ファンのブレード構造
JPH06159733A (ja) * 1992-11-18 1994-06-07 Mitsubishi Electric Corp 空気調和機の室外ユニット
JPH06159297A (ja) * 1992-11-25 1994-06-07 Daikin Ind Ltd 送風機構
JPH06173896A (ja) * 1992-12-04 1994-06-21 Toshiba Corp 送風機および空気調和機の室外ユニット

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008223760A (ja) * 2007-02-13 2008-09-25 Daikin Ind Ltd 送風機の羽根車
CN104903584A (zh) * 2012-12-05 2015-09-09 威乐欧洲股份公司 特别是用于废水或污水的离心泵
US10539157B2 (en) 2015-04-08 2020-01-21 Horton, Inc. Fan blade surface features
US10662975B2 (en) 2015-04-08 2020-05-26 Horton, Inc. Fan blade surface features
CN107956716A (zh) * 2017-11-09 2018-04-24 重庆馨艺科技有限公司 一种新型电风扇扇叶
JP2020094549A (ja) * 2018-12-13 2020-06-18 三菱電機株式会社 プロペラファン
JP7122953B2 (ja) 2018-12-13 2022-08-22 三菱電機株式会社 プロペラファン

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