CN104641121B - Propeller type fan and possess the air conditioner of this propeller type fan - Google Patents
Propeller type fan and possess the air conditioner of this propeller type fan Download PDFInfo
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- CN104641121B CN104641121B CN201380048377.8A CN201380048377A CN104641121B CN 104641121 B CN104641121 B CN 104641121B CN 201380048377 A CN201380048377 A CN 201380048377A CN 104641121 B CN104641121 B CN 104641121B
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- blade
- propeller type
- type fan
- radius
- pressure face
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/141—Shape, i.e. outer, aerodynamic form
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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
-
- 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
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
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- 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
- F05D2250/712—Shape curved concave
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
Propeller type fan (4) possesses blade (12), blade (12) is in following shape: have the peak value of the exit angle (θ) of hinder marginal part (15) in the exterior lateral area (12B) being positioned at radial outside compared with representing root mean square radii position (Rr), further, also there is the peak value of the exit angle (θ) of hinder marginal part (15) in the inside region (12A) being positioned at radially inner side compared with representing root mean square radii position (Rr).
Description
Technical field
The present invention relates to a kind of propeller type fan and possess the air conditioner of this propeller type fan.
Background technology
Conventionally, there is known for the propeller type fan of air conditioner etc..If propeller type fan rotates, outside blade
Produce the air stream (leakage current) of the suction surface side low around pressure from the high pressure face side of pressure near perimembranous, because of this air stream,
Peripheral part at blade is formed about eddy current (wingtip vortex).This kind of wingtip vortex becomes the reason of noise.
Propeller type fan disclosed in patent documentation 1, realizes wing tip by arranging bending part at the peripheral part of blade
The stabilisation in whirlpool, it is intended to reduce noise.
But, if patent documentation 1 the most only peripheral part at blade arranges bending part, sometimes might not obtain abundant
Noise reducing effect.
Prior art literature
Patent documentation
Patent documentation 1: Japanese Laid Open Patent spy's table 2003-072948
Summary of the invention
It is an object of the invention to provide a kind of propeller type fan being capable of low noise.
The propeller type fan of the present invention possesses leaf hub and the blade being connected with described leaf hub, and described blade is following shape
Shape: there is the peak of the exit angle of hinder marginal part in the exterior lateral area being positioned at radial outside compared with representing root mean square radii position
Value, and, with described represent root mean square radii position compared be positioned at the inside region of radially inner side also there is going out of hinder marginal part
The peak value of bicker degree, when the exit angle of described hinder marginal part is blade described in circumferentially cutting, edge and pressure face in the rear
Tangent tangent line and be perpendicular to the straight line angulation of rotary shaft of propeller type fan, described represents root mean square radii position
It is to use the following formula represented by the representative radius R of described blade and the representative radius r of described leaf hub to calculate: represent mean square
Root radius position Rr=((R2+r2)/2)0 . 5, in the case of the external diameter of described blade is constant on rotary shaft direction, described leaf
/ 2nd of the external diameter that representative radius R is described blade of sheet, the external diameter of described blade on rotary shaft direction non-constant
In the case of, the representative radius R of described blade is minimum blade radius R1 and the meansigma methods of maximum blade radius R2, at described leaf
In the case of the external diameter of hub is constant on rotary shaft direction, two points of the external diameter that representative radius r is described leaf hub of described leaf hub
One of, in the case of the external diameter of described leaf hub is inconstant on rotary shaft direction, the representative radius r of described leaf hub is lobule
Hub radius r1 and the meansigma methods of maximum leaf hub radius r2, the maximum of the radius of curvature of the pressure face of described inside region is more than institute
State the maximum of the radius of curvature of the pressure face of exterior lateral area.
Accompanying drawing explanation
Fig. 1 is the sectional view of the schematic configuration of the off-premises station representing the air conditioner involved by one embodiment of the present invention.
Fig. 2 is the front view of the propeller type fan involved by the first embodiment representing the present invention.
Fig. 3 is the curve chart of the relation between radial location and the exit angle of the hinder marginal part representing propeller type fan.
(A) of Fig. 4 is to represent in the blade of the propeller type fan of the first embodiment 5 with the curve chart of Fig. 3
The front view of the radial location that radial location A1-A5 is corresponding, (B) is to represent in the blade of the propeller type fan of reference example
Front view with the 5 of the coordinate diagram of Fig. 3 radial location that radial location A1-A5 is corresponding.
Fig. 5 is the figure of the representative root mean square radii position for propeller type fan is described.
Fig. 6 is the sectional view of the circumferential cutting along blade.
(A), (B) of Fig. 7 is the VIIA-VIIA line sectional view of Fig. 4 (A), and (C) is the VIIC-VIIC line section view of Fig. 4 (B)
Figure.
(A) of Fig. 8 is the axonometric chart of the air flowing in the propeller type fan involved by the first embodiment, and (B) is
Roughly represent the figure that its air flows.
(A) of Fig. 9 is the axonometric chart representing the air flowing in the propeller type fan involved by reference example, and (B) is general
Slightly represent the figure of its air flowing.
(A), (B) of Figure 10 is involved by characteristic and the reference example comparing the propeller type fan involved by the first embodiment
And the curve chart of characteristic of propeller type fan.(A) representing the relation of air quantity and air-supply sound, (B) represents air quantity and fan horse
Reach the relation of input.
(A) of Figure 11 is the facing an of part representing the propeller type fan involved by second embodiment of the present invention
Figure, (B) is the XIB-XIB line sectional view of (A).
Detailed description of the invention
<overall structure of air conditioner>
Below, it is described with reference to the propeller type fan involved by embodiments of the present invention and possesses this propeller
The air conditioner of formula fan.Fig. 1 is the schematic configuration of the off-premises station 1 representing the air conditioner involved by one embodiment of the present invention
Sectional view.Air conditioner possesses the indoor set of the off-premises station 1 and Tu Lve shown in Fig. 1.Off-premises station 1 possesses outdoor heat converter 3, spiral
Paddle fan 4, motor 5 and figure compressor etc. slightly, these are housed in shell 2.Described indoor set possesses the swollen of figure summary
Swollen mechanism, indoor heat converter etc..Compressor, outdoor heat converter 3, expansion mechanism, indoor heat converter and connect these
Figure refrigerant piping slightly constitute the refrigerant loop of described air conditioner.
In the off-premises station 1 shown in Fig. 1, the rear side of shell 2 is provided with outdoor heat converter 3, in the front face side of shell 2
It is provided with blow-off outlet 7, but is not limited to this.In off-premises station 1, blow-off outlet 7 such as can also be arranged on the top of shell 2.
The fan guard 7a with cell structure it is provided with at blow-off outlet 7.
Propeller type fan 4 is configured in the inner side of the blow-off outlet 7 of shell 2.Propeller type fan 4 is connected to motor 5
Axle 5a, is rotated centered by rotary shaft A0 by motor 5.In the present embodiment, rotary shaft A0 of propeller type fan 4 towards
Fore-and-aft direction (horizontal direction), but it is not limited to this.Rotary shaft A0 such as can also be towards tilting relative to horizontal direction
Direction.Additionally, be such as arranged at blow-off outlet 7 in the off-premises station 1 on the top of shell 2, rotary shaft A0 of propeller type fan 4 is also
Can be towards above-below direction (vertical).
The bell mouth 6 of the periphery surrounding propeller type fan 4 it is provided with in shell 2.Bell mouth 6 is arranged on region X
Between (inhalation area X) and region Y (blowout region Y), wherein, region X is positioned at the upper of air stream compared with propeller type fan 4
Trip side, region Y is positioned at the downstream of air stream compared with propeller type fan 4.Bell mouth 6 is the week along propeller type fan 4
The circular parts enclosed, will be guided to blow-off outlet 7 by the air of outdoor heat converter 3.Bell mouth 6 with not with propeller type
The mode of fan 4 contact is opened small-gap suture with propeller type fan 4 sky and is configured.
Propeller type fan 4, motor 5 and bell mouth 6 constitute axial flow fan 8.If the motor of this axial flow fan 8
5 drive and propeller type fan 4 rotates, then inhalation area X with blowout region Y produce pressure differential, formed from inhalation area X court
To the air flowing of blowout region Y.
<the first embodiment>
Fig. 2 is the front view of the propeller type fan 4 involved by the first embodiment representing the present invention.Propeller type wind
Fan 4 possesses leaf hub 11 and multiple blade 12.In the present embodiment, propeller type fan 4 possesses 3 blades 12, but does not limit
Due to this, it is also possible to possess the blade 12 of 2 blades 12 or more than 4.In the present embodiment, leaf hub 11 and multiple blade 12
By integrally formed and formed, but it is not limited to this, it is also possible to formed by being engaged by the multiple parts being formed separately.
Leaf hub 11 is generally cylindrical the shape such as shape, truncated cone shape, but is not limited to this.Leaf hub 11 has multiple leaf
The outer peripheral face 11a that sheet 12 connects.Multiple blades 12 along the outer peripheral face 11a of leaf hub 11 to be configured at equal intervals.Such as in cylinder
In the case of the leaf hub 11 of shape, its external diameter constant, and such as in the case of the leaf hub 11 of truncated cone shape, its external diameter with
And become big towards rotary shaft A0 direction or diminish.Additionally, leaf hub 11 can also be such as by cylindrical shape and truncated cone shape
The shape of combination, it is also possible to for other shapes.Rotary shaft A0 of propeller type fan 4 is positioned at the center of leaf hub 11.
Each blade 12 has: is positioned at radially inner side (leaf hub 11 side) and is connected to the inner peripheral portion 13 of leaf hub 11；It is positioned at rotation
The exterior region 14 of the front side of direction D；It is positioned at hinder marginal part 15 and the position of the rear side (opposition side of direction of rotation D) of direction of rotation D
Peripheral part 16 in radial outside.Each blade 12 is in the side being integrally located at inhalation area X with exterior region 14 compared with hinder marginal part 15
Formula twisted shape.It is positioned at the pressure face 21 of blow-off outlet 7 side (blowout Y side, region) additionally, each blade 12 has and is positioned at its phase
Toss about the suction surface 22 (with reference to Fig. 6) of (inhalation area X side).
As in figure 2 it is shown, peripheral part 16 comprises the end bending to suction surface 22 side (inhalation area X side) bending of blade 12
The edge, periphery 18 of the edge of the radial outside of portion 17 and composition blade 12.Peripheral part 16 is to have from edge, bending part 17 to periphery
The region of the width of 18.By arranging bending part 17, it is possible to suppression produces eddy current near the peripheral part 16 of each blade 12.
Bending part 17 extends to hinder marginal part 15 from exterior region 14 (or near exterior region 14).In the present embodiment, periphery
The width (bending part 17 and the distance of edge, periphery 18) in portion 16 is along with becoming big towards hinder marginal part 15, but is not limited to this.
Additionally, bending part 17 also can omit, now, peripheral part 16 is made up of edge, periphery 18.
(exit angle of hinder marginal part)
It follows that the feature of propeller type fan 4 of explanation the first embodiment, i.e., the exit angle θ of hinder marginal part 15.
In the graph of figure 3, solid line represents the hinder marginal part of propeller type fan 4 of the first embodiment shown in Fig. 2 and Fig. 4 (A)
Relation between radial location and the exit angle θ of 15, after dotted line represents the propeller type fan 104 of the reference example of Fig. 4 (B)
Relation between radial location and the exit angle θ of edge 115.
The propeller type fan 104 of simple declaration reference example.The propeller type fan 104 of reference example possesses leaf hub 111 He
Three blades 112.Each blade 112 has inner peripheral portion 113, exterior region 114, hinder marginal part 115 and peripheral part 116 (bending part
117, edge, periphery 118).Additionally, each blade 112 has pressure face 121 and suction surface 122 (with reference to Fig. 7 (C)).
As it is shown on figure 3, the hinder marginal part 15 of each blade 12 of the propeller type fan 4 at the first embodiment, exit angle θ
Peak value exist multiple.Specifically, at the hinder marginal part 15 of each blade 12, the peak value of exit angle θ exists two, one of them
Peak value is arranged on the hinder marginal part 15 of exterior lateral area 12B being positioned at radial outside compared with representing root mean square radii position Rr, another
Peak value is arranged on the hinder marginal part 15 of inside region 12A being positioned at radially inner side compared with representing root mean square radii position Rr.
Additionally, in the present embodiment, peak value is not necessarily referring to the maximum of exit angle.That is, at the curve shown in Fig. 3
In figure, the exit angle on the summit being equivalent to broken line part protruding upward is peak value.Therefore, at the trailing edge of a blade 12
In portion 15, also occasionally there are multiple peak values of mutually different exit angle.
In contrast, the hinder marginal part 15 of each blade 12 at the reference example shown in Fig. 4 (B), the peak value of exit angle θ is only deposited
At one.This peak value is arranged on the hinder marginal part of the exterior lateral area being positioned at radial outside compared with representing root mean square radii position Rr
115.The exit angle θ of the hinder marginal part 115 in this reference example be designed to along with from inner peripheral portion 113 towards peripheral part 116 side
Becoming larger, the peak value of the exit angle θ of hinder marginal part 115 is arranged on compared with representing root mean square radii position Rr and is positioned at radially
The exterior lateral area (the neighbouring position of peripheral part 116) in outside.
Representing root mean square radii position Rr is that the flow path area 2 of propeller type fan 4 (104) is divided into central side (leaf
Hub side) and the radial location of outer circumferential side.Fig. 5 is the representative root mean square radii position Rr for propeller type fan 4 (104) is described
Figure.Representing root mean square radii position Rr is the representative half using the representative radius R by blade 12 (112) and leaf hub 11 (111)
Following formula (1) that footpath r represents and calculate.
Represent root mean square radii position Rr=((R2+r2)/2)0 . 5 ……(1)
The representative radius R of blade obtains as follows.
That is, the representative radius R of blade is the two of this external diameter in the case of the external diameter of blade is constant on rotary shaft direction
/ mono-.
In the case of the external diameter of blade is inconstant on rotary shaft direction, obtain the representative radius R of blade as follows.
That is, the representative radius R of blade is the meansigma methods (R=(R1+R2)/2) of minimum blade radius R1 and maximum blade radius R2.
The representative radius r of leaf hub in the case of the external diameter of leaf hub is constant on rotary shaft direction be this external diameter two/
The value of one.
External diameter inconstant situation on rotary shaft direction at leaf hub situation such leaf hub in such as truncated cone shape
Under, the representative radius r of leaf hub obtains as follows.
That is, the representative radius r of leaf hub is lobule hub radius the r1 and meansigma methods (r=(r1+ of maximum leaf hub radius r2
r2)/2)。
Shown in Fig. 35 radial location A1-A5 is corresponding with radial location A1-A5 shown in Fig. 4 (A), (B).Such as half
Path position A1 is when as shown in Fig. 4 (A), (B), propeller type fan is observed in front, the radius centered by rotary shaft A0
The circle of A1 and the position of blade 12 (112) overlap.Due to the most identical for radial location A2-A5, therefore omit the description.
In Fig. 4 (A), first embodiment of (B) and reference example, radial location A3 with represent root mean square radii position
Rr is consistent, but is not limited to this.Radial location A3 has the minimum exit angle θ 3 between two peak values.Radial location
A1, A2 are positioned at compared with radial location A3 inside region 12A being in leaf hub 11 side.Radial location A4, A5 are positioned at and radius position
Put A3 and compare exterior lateral area 12B being in peripheral part 16 side.
Fig. 6 is the sectional view (sectional view of radial location A3 of such as Fig. 4) of circumferentially cutting blade 12.Shown in Fig. 6
Sectional view in, the exit angle θ of hinder marginal part 15 is at the hinder marginal part 15 tangent line L3 tangent with pressure face 21 and to be perpendicular to spiral
The straight line L4 angulation of rotary shaft A0 of paddle fan 4.
In the first embodiment, as it is shown on figure 3, the peak value of exit angle θ of inside region 12A, i.e. inside region 12A
The maximum of exit angle θ be the exit angle θ 2 of radial location A2 (the first peak).Additionally, exterior lateral area 12B
The maximum of the exit angle θ of the peak value of exit angle θ, i.e. exterior lateral area 12B is radial location A4 (the second peak)
Exit angle θ 4.
The exit angle θ 3 of radial location A3 is less than exit angle θ 2, θ 4.In the present embodiment, between peak
(between radial location A2 and radial location A4), the minima of exit angle θ is to represent root mean square radii position Rr (radial location
A3) exit angle θ 3, but it is not limited to this.The minima of the exit angle θ between peak can also be from representing all
The exit angle of the position of root radial location Rr deviation.
In the present embodiment, the exit angle θ of hinder marginal part 15 becomes larger from inner peripheral portion 13 to radial location A2, from half
Path position A4 tapers into peripheral part 16 (bending part 17).Additionally, the exit angle θ of hinder marginal part 15 is from radial location A2 to half
Path position A3 tapers into, and becomes larger to radial location A4 from radial location A3.That is, the going out of the hinder marginal part 15 of present embodiment
Mouth angle, θ changes with substantially M shape as shown in Figure 3.
Exit angle θ 2, θ 4 for peak enumerate concrete example then with the minima i.e. difference of exit angle θ 3 therebetween
As described below.That is, the difference of exit angle θ 2 and exit angle θ 3 is for example, it can be set to 0.5 degree～the scope of 10 degree or 1 degree～5
The scope of degree.Additionally, the difference of exit angle θ 4 and exit angle θ 3 is for example, it can be set to 0.5 degree～the scope of 10 degree or 1 degree
～the scope of 5 degree.
Additionally, in the example illustrated as embodiment in Fig. 3, the angle of outlet of radial location A2 (the first peak)
Degree θ 2 is identical value with the exit angle θ 4 of radial location A4 (the second peak), but is not limited to this.Exit angle θ 2
Can also be mutually different value with exit angle θ 4.Specifically, exit angle θ 2 can be more than exit angle θ 4, it is also possible to
Less than exit angle θ 4.
(radius of curvature of pressure face)
It follows that the curvature half of explanation other features of propeller type fan 4 of the first embodiment, i.e. pressure face 21
Footpath.Fig. 7 (A), (B) are the VIIA-VIIA line sectional views of Fig. 4 (A).Fig. 7 (A), (B) are the plane cuttings comprising rotary shaft A0
The sectional view during propeller type fan 4 of the first embodiment.Fig. 7 (C) is the VIIC-VIIC line sectional view of Fig. 4 (B).Fig. 7
(C) sectional view when being the propeller type fan 104 of the plane cutting reference example comprising rotary shaft A0.
As shown in Fig. 7 (A), in the propeller type fan 4 of the first embodiment, the pressure face 21A of inside region 12A
(inside pressure face 21A) comprises concave curved surface, and the pressure face 21B (outside pressure face 21B) of exterior lateral area 12B also comprises recessed with described
The concave curved surface that curved surface is different.In the present embodiment, outside pressure face 21B is to represent root mean square radii position Rr and peripheral part 16
Bending part 17 between region.
The concave curved surface of inside pressure face 21A and the concave curved surface of outside pressure face 21B are via representing root mean square radii position Rr
And it is adjacent.In other words, the concave curved surface of inside pressure face 21A and the concave curved surface spread configuration diametrically of outside pressure face 21B.As
Shown in Fig. 7 (A), representative root mean square radii position Rr and its neighbouring pressure face 21C that the two concave curved surface is connected are convex
Curved surface.
The concave curved surface of inside pressure face 21A is circumferentially formed to hinder marginal part 15 from exterior region 14, and outside pressure face 21B's is recessed
Curved surface is the most circumferentially formed to hinder marginal part 15 from exterior region 14.
Inside pressure face its entirety of 21A can be concave curved surface, but is not limited to this.In the present embodiment, interior side pressure
The region of the Rr side, representative root mean square radii position in the 21A of power face is concave curved surface, and the region of inner peripheral portion 13 side be plane or
There is the shape of the general planar close to plane.Additionally, outside pressure face its entirety of 21B can be concave curved surface, but do not limit
In this.In the present embodiment, the most generally concave curved surface of outside pressure face 21B.
Additionally, the degree that suction surface 22 does not changes with the thickness of blade 12 is formed along pressure face 21 the most very much.Therefore,
The suction surface 22 of the rear side being positioned at the concave curved surface of pressure face 21 is convex surface.
The maximum of the maximum of the radius of curvature of the inside pressure face 21A radius of curvature more than outside pressure face 21B.This
Outward, the maximum of the radius of curvature of the suction surface 22A (inner side suction surface 22A) of inside region 12A bearing more than exterior lateral area 12B
The maximum of the radius of curvature of pressure surface 22B (outside suction surface 22B).That is, inside pressure face 21A has and outside pressure face 21B
Compare planar.Smooth shape for inside pressure face 21A also can illustrate as follows.
That is, in the sectional view of Fig. 7 (B), end T1 and the pressure face 21 of inner peripheral portion 13 side connecting pressure face 21 is drawn
Imaginary line L5 with the intersection point T2 representing root mean square radii position Rr.Additionally, draw connect pressure face 21 peripheral part 16 (
For bending part 17 in present embodiment) vacation of the end T3 of side and pressure face 21 and the intersection point T2 representing root mean square radii position Rr
Think straight line L6.In the first embodiment, the maximum D1 of the distance of imaginary line L5 and pressure face 21 (inside pressure face 21A)
Maximum D2 less than imaginary line L6 Yu the distance of pressure face 21 (outside pressure face 21B).
In the sectional view of Fig. 7 (B), become the position on the pressure face 21 of maximum D1 and be arranged on compared with the T1 of end
Position close to intersection point T2.That is, the position become on the pressure face 21 of maximum D1 is not arranged in the 21A of inside pressure face
Inner peripheral portion 13 side, and it is provided in the position being biased against representing Rr side, root mean square radii position.That is, inside region 12A of blade 12
The position of inner peripheral portion 13 side compared with the position of peripheral part 16 side of inside region 12A (representing Rr side, root mean square radii position)
There is smooth shape (shape of bidimensionality).
In contrast, in the propeller type fan of the reference example shown in Fig. 7 (C), the pressure face 121 of each blade 112 interior
The region of the bending part 117 of perimembranous 113 to peripheral part 116 is to be formed by a big concave curved surface.The rear side of this pressure face 121
Suction surface 122 there is the shape corresponding with pressure face 121.That is, the folding of inner peripheral portion 113 to the peripheral part 116 of suction surface 122
The region of turn of bilge 117 is formed by a big convex surface.
As shown in Fig. 7 (C), each blade 112 of reference example has and radially extends and to rotation compared with the first embodiment
The three-dimensionality shape that rotating shaft A0 direction bends larger.Specifically, in the sectional view shown in Fig. 7 (C), draw connection pressure
The end T11 of inner peripheral portion 113 side in power face 121 and the peripheral part 116 (being bending part 117 in this reference example) of pressure face 121
The imaginary line L11 of the end T12 of side.Now, the maximum D11 of the distance of imaginary line L11 and pressure face 121 becomes and the
Maximum D1, D2 of one embodiment compare sizable value.
Therefore, in reference example, compared with the first embodiment, the sectional area of each blade 112 increases, propeller type fan
Overall volume and weight also increase.Therefore, saving resource, reducing existing problems in the viewpoints such as cost.
Additionally, each blade 112 of reference example has above-mentioned three-dimensionality shape, therefore, because propeller type fan rotates
And the stress produced and easy elastic deformation.That is, each blade 112 of reference example is owing to being the starting point with multiple elastic deformation
Three-dimensionality shape, therefore, wants the deformation pattern being deformed into the shape of bidimensionality (to want to be radially oriented outside to extend during rotation
Deformation pattern) in, be susceptible to this kind of elastic deformation.Therefore, each blade 112 of reference example needs to strengthen to suppress
Elastic deformation, its result, there is the problem that weight increases further.
On the other hand, the propeller type fan 4 of the first embodiment shown in Fig. 7 (A), (B) is unlike reference example
One big concave curved surface, but use the structure combined by least two concave curved surface as above.As shown in Fig. 7 (B), in this reality
Executing in mode, two concave curved surfaces are respectively provided with the peak value (maximum D1, D2) of the degree of depth of concave curved surface.Two of first embodiment
Degree of depth D1 of concave curved surface, D2 (maximum D1, D2) are less than the degree of depth (maximum D11) of the concave curved surface of reference example.Additionally, first is real
Execute the radical length of each concave curved surface of mode again smaller than the radical length of the concave curved surface of reference example.
Each blade 12 of the first embodiment with features above is in a ratio of smooth shape with each blade 112 of reference example
Shape (shape of bidimensionality).Use the blade 12 of the first embodiment of this kind of shape, from inner peripheral portion 13 to peripheral part 16
The blade 112 of thickness distribution and reference example under similar circumstances, can make the sectional area of each blade 12 diminish compared with reference example.
Hereby it is possible to reduce the weight of each blade 12, therefore, compared with reference example, it is also possible to reduce the body of propeller type fan 4 entirety
Amass and weight.
Additionally, the blade 112 of each blade 12 of the first embodiment and reference example is in a ratio of smooth shape, therefore, no
The elastic deformation that the stress being susceptible to produce because propeller type fan 4 rotates is caused.That is, each leaf of the first embodiment
Sheet 12 is originally used for the shape of bidimensionality, and therefore, deflection during elastic deformation is little.
It addition, in the present embodiment shown in Fig. 7 (A), use arrow along the quantity of motion such as figure of the air of pressure face 21 flowing
Shown in head, in outside pressure face, 21B can change the most significantly.In contrast, in the reference example shown in Fig. 7 (C), in figure
Shown with arrows, the quantity of motion along the air of pressure face 121 flowing changes on whole pressure face 121.
(recess of hinder marginal part)
It follows that the recess of the explanation other feature of propeller type fan 4 of the first embodiment, i.e. hinder marginal part 15
19.As shown in Fig. 4 (A), the hinder marginal part 15 at each blade 12 of present embodiment is provided with the recess of side, edge 14 depression forward
19.Recess 19 is arranged on and comprises the region representing root mean square radii position Rr.This optional structure of recess 19, it is possible to save
Slightly.The shape of recess 19 can enumerate when facing for example, substantially V-like shape, substantially U-shaped etc., but is not limited to this.
The representative root mean square radii position Rr of the hinder marginal part 15 by easily rising at the pressure of pressure face 21 arranges recess
19, it is possible to the pressure of the representative root mean square radii position Rr reducing hinder marginal part 15 rises.Accordingly, along pressure face 21 from exterior region 14
The air flowing to hinder marginal part 15 side flows to leaf hub 11 near hinder marginal part 15 in the way of avoiding representing root mean square radii position Rr
Side and peripheral part 16 side, therefore, it is possible to improve the effect circumferentially guided by air-flow further.Utilize this recess 19 to circumference
Guiding effect and utilize representing root mean square radii position Rr and be respectively provided with outlet for boundary in leaf hub 11 side and peripheral part 16 side
The guiding effect of the peak value of angle, θ works mutually, it is possible to raising circumferentially guides the effect of air-flow further.
Additionally, in the present embodiment, the bottom 19a of recess 19 (is positioned at the portion of the forefront of direction of rotation D in recess 19
Point) be in and represent root mean square radii position Rr, but it is not limited to this.Root-mean-square half is represented when the bottom 19a of recess 19 is in
During path position Rr, it is possible to improve above-mentioned guiding effect further.
(air flowing during rotation)
It follows that with the air flowing during rotation of the propeller type fan 4 of reference example comparative descriptions the first embodiment.
Fig. 8 (A) is the axonometric chart representing the air flowing in the propeller type fan involved by the first embodiment, and Fig. 8 (B) is outline
Ground represents the figure of this air flowing.Fig. 9 (A) is the solid representing the air flowing in the propeller type fan involved by reference example
Figure, Fig. 9 (B) is roughly to represent the figure that this air flows.
As shown in Fig. 8 (A), (B), in the propeller type fan 4 of the first embodiment, especially empty in inside region 12A
The effect that flow of air is directed to circumference is high, and its result, the flowing to peripheral part 16 side is inhibited.
In contrast, in the reference example shown in Fig. 9 (A), (B), be directed to the effect of circumference in the flowing of inside region air
The lowest, air readily flows to peripheral part 116 side.
Its result, in the first embodiment as shown in Figure 10 (A), compared with reference example, air-supply sound is greatly lowered.And
And, in the first embodiment, in the case of the reducing effect obtaining air-supply sound, with big with the reference example shown in Figure 10 (B)
Cause equal fan motor input and obtain equal air quantity.In the first embodiment, in the situation without sacrificing wind pushing performance
Lower minimizing weight.
<the second embodiment>
Figure 11 (A) is the facing an of part representing the propeller type fan 4 involved by second embodiment of the present invention
Figure, Figure 11 (B) is the XIB-XIB line sectional view of Figure 11 (A).
In the propeller type fan 4 of this second embodiment, each blade 12 has the 3D shape as reference example,
It is different from the first embodiment in this.That is, as shown in Figure 11 (B), in each blade 12 of the second embodiment, pressure
Face 21 is formed by a big concave curved surface from the region of the bending part 17 of inner peripheral portion 13 to peripheral part 16.
But, in this second embodiment, each blade 12 such as has going out as the first embodiment shown in Fig. 3
The feature of mouth angle, θ, is different from reference example in this.I.e., in this second embodiment, each blade 12 in following shape,
That is: there is the angle of outlet of hinder marginal part 15 in exterior lateral area 12B being positioned at radial outside compared with representing root mean square radii position Rr
The peak value of degree θ, and, in the inside region being positioned at radially inner side compared with representing root mean square radii position Rr, also there is hinder marginal part
The peak value of the exit angle θ of 15.
<summary of embodiment>
As described above, the first embodiment and the second embodiment use the flow path area 2 of propeller type fan 4
It is divided into the representative root mean square radii position Rr of radially inner side and radial outside as benchmark, makes to account for outside the half of flow path area
Inside region 12A of side region 12B and the remaining half that accounts for flow path area is respectively provided with the function directing the air to circumference, by
This can be effectively reduced noise.
I.e., in these structures, be there is in exterior lateral area 12B the peak value of the exit angle θ of hinder marginal part 15 by employing
Blade shape is many in the work quantitative change of the fan of the hinder marginal part 15 of exterior lateral area 12B, it is possible to increase by along exterior lateral area 12B
The air of pressure face 21 flowing guides the effect of circumference.And, in these structures, also have in inside region 12A by using
There is the blade shape of the peak value of the exit angle θ of hinder marginal part 15, in the work quantitative change of fan of the hinder marginal part 15 of inside region 12A
Many, it is also possible to improve the air flowed by the pressure face 21 along inside region 12A and guide the effect of circumference.Hereby it is possible to suppression
Air flow direction peripheral part 16 side (wing tip side), therefore, near peripheral part 16 from pressure face 21 side sky around suction surface 22 side
The increase of air-flow (leakage current) is inhibited.Its result, the generation of the wingtip vortex caused because of leakage current is inhibited such that it is able to reduce
Noise.Additionally, by making the increase of leakage current be inhibited, the decline of fan performance is also inhibited.
At the first embodiment, the maximum of the radius of curvature of the pressure face 21 of inside region 12A is more than exterior lateral area 12B
The maximum of radius of curvature of pressure face 21.I.e., in this embodiment, due to inside region 12A and exterior lateral area 12B phase
Less than the maximum of radius of curvature have more smooth shape, therefore, especially can reduce cutting of blade 12 in inside region 12A
Area.Hereby it is possible to realize the lightweight of blade 12, and volume is suppressed to increase.
In the first embodiment, the pressure face 21 of inside region 12A and the pressure face 21 of exterior lateral area 12B comprise recessed
Curved surface.In the structure shown here, the pressure face 21 of inside region 12A and the pressure face 21 of exterior lateral area 12B are respectively provided with concave curved surface, because of
This, can improve the effect that the air flowed along pressure face 21 guides circumference further in respective region.
And, at the first embodiment, the maximum of the pressure face 21 of exterior lateral area 12B is less than the pressure of inside region 12A
The maximum in power face 21, and the pressure face of these regions 12A, 12B all uses the structure comprising concave curved surface.Close to peripheral part 16
The pressure face 21 of exterior lateral area 12B is big with the barometric gradient of suction surface 22, and its radius of curvature is set to little, thereby, it is possible to enter one
Step improves the air flowed by the pressure face 21 along exterior lateral area 12B and guides the effect of circumference.Its result, at whole pressure face 21
Suppress the generation of leakage current further.
In the first embodiment, it is respectively equipped with a concave curved surface in inside region 12A and exterior lateral area 12B, and also
It is respectively present the peak value of an exit angle θ.This kind of relatively simple structure can be utilized to realize low noise, and realize blade
Lightweight and the suppression volume of 12 increase.
In the first embodiment and the second embodiment, at the hinder marginal part 15 of blade 12, represent root-mean-square comprising
The region of radial location Rr is provided with the recess 19 of side, edge 14 depression forward.In these structures, maximum is risen at pressure
The region representing the comprising of hinder marginal part 15 root mean square radii position Rr is provided with recess 19, therefore, pressure near this recess 19
Rise and reduce.Accordingly, the air of hinder marginal part 15 side is flowed near hinder marginal part 15 to avoid representing root-mean-square half from exterior region 14
The mode of path position Rr flows to leaf hub 11 side and peripheral part 16 side, therefore, it is possible to improve the effect that air-flow guides circumference further
Really.
Additionally, in each blade 12 of the first embodiment, according to as in Fig. 2 boost line L1 and position P1 and position P2 it
Between position relationship understand, compared to the position P2 of exterior region 14 with the coupling part of inner peripheral portion 13, exterior region 14 and peripheral part
The position P1 of the coupling part of 16 is positioned at the front side of direction of rotation D.
It addition, according to such as position relationship between boost line L2 and position P3 and position P4 in Fig. 2, this embodiment party
In each blade 12 of formula, compared to the position P4 of hinder marginal part 15 with the coupling part of inner peripheral portion 13, hinder marginal part 15 and peripheral part 16
The position P3 of coupling part be positioned at the rear side of direction of rotation D.
In contrast, in the propeller type fan of the reference example shown in Fig. 4 (B), according to boost line L12 and position P13 and
Position relationship between the P14 of position understands, in each blade 112, compared to the coupling part of hinder marginal part 115 with inner peripheral portion 113
Position P14, the position P13 of hinder marginal part 115 and the coupling part of peripheral part 116 be positioned at the front side of direction of rotation D.
Therefore, in the first embodiment shown in Fig. 2, compared with the reference example shown in Fig. 4 (B), especially at medial area
Territory 12A realizes the miniaturization of size, realizes the lightweight of blade 12 accordingly.
<variation>
It is explained above embodiments of the present invention, but the present invention is not limited to these embodiments, without departing from it
Various change, improvement etc. can be carried out in the range of purport.
In said embodiment, it is used in the situation of the off-premises station 1 of air conditioner exemplified with propeller type fan, but not
It is defined in this.Propeller type fan can also be used for example as the fan of the indoor set of air conditioner, in addition it is also possible to be used as ventilation fan
Deng fan.
At the first embodiment, divide exemplified with the pressure face 21A of inside region 12A and the pressure face 21B of exterior lateral area 12B
Do not contain the situation of concave curved surface, but be not limited to this.The pressure face 21A that can enumerate such as inside region 12A is plane, outside
The face of buckling of region 12B is the structure of flexure plane (concave curved surface or convex surface).In addition, it is possible to enumerate the pressure of inside region 12A
Face 21A is flexure plane (concave curved surface or convex surface), and the face of buckling of exterior lateral area 12B is the structure of plane.
Additionally, summarize above-mentioned embodiment, the most as described below.
(1) propeller type fan of the present invention possesses blade, and described blade is following shape: with represent root mean square radii
The peak value being positioned at the exit angle that the exterior lateral area of radial outside has hinder marginal part is compared in position, and, equal with described representative
Root radial location compares the peak value being positioned at the exit angle that the inside region of radially inner side also has hinder marginal part.
In the structure shown here, the flow path area 2 of propeller type fan is divided into the generation of radially inner side and radial outside by employing
Table root mean square radii position, as benchmark, makes account for the exterior lateral area of the half of flow path area and account for the remaining half of flow path area
Inside region be respectively provided with direct the air to circumference function, it is possible to be effectively reduced noise.Specifically, as follows
Described.
In general, when propeller type fan rotates, because of barometric gradient and the impact of centrifugal force, along pressure face flowing
Air has the tendency readily flowing to peripheral part side (wing tip side).
To this, in the structure shown here, be there is in exterior lateral area the blade-shaped of the peak value of the exit angle of hinder marginal part by employing
Shape, many in the work quantitative change of the fan of the hinder marginal part of exterior lateral area, therefore, it is possible to improve, the pressure face along exterior lateral area is flowed
Air guide circumference effect.And, in the structure shown here, also by using the angle of outlet also with hinder marginal part in inside region
The blade shape of the peak value of degree, many in the work quantitative change of the fan of the hinder marginal part of inside region, will be along interior thus, it is also possible to improve
The air of the pressure face flowing of side region guides the effect of circumference.Hereby it is possible to suppression air flow direction peripheral part side (wing tip side),
Therefore, near peripheral part, from pressure face side, the increase of air stream (leakage current) around suction surface side is inhibited.Its result, because of
The generation of the tip vortex that leakage current causes is inhibited such that it is able to reduce noise.Additionally, by the increase suppressing leakage current, wind
The decline of fan performance is also inhibited.
Additionally, as it has been described above, in the propeller type fan possessing said structure, from the exterior region feed pressure face of blade
The situation of radial outside of air flow peripheral part side (wing tip side) be inhibited, the flowing of circumference prevails.Accordingly,
The height (thickness of the leaf hub on rotary shaft A0 direction) of leaf hub can be reduced, therefore, it is possible to make propeller type fan lightweight.
Specifically, the most as described below.
In propeller type fan, if reducing the height of leaf hub, then in being connected to the blade of outer peripheral face of leaf hub
The perimembranous junction surface of leaf hub (in the blade with) is also required to reduce blade height.Described blade height is described junction surface mean camber line
Difference of height between one end (end of front edge side) and the other end (end of trailing edge side) of (camber line) (rotates axial
Difference of height).If described blade height diminishes, then the workload (rising of blade head) of the blade near described junction surface becomes
Little, air from exterior region feed pressure face is easily towards the big wing tip side (the rising big wing tip side of blade head) of workload
Flow to radial outside.Therefore, if reducing the height of leaf hub in conventional propeller type fan, then the flowing of circumference can not be made
Dominant.Want to obtain the workload (rising of blade head) of the blade near described junction surface, it is contemplated that by making from institute
The expansion stating the junction surface fan-shaped blade towards wing tip becomes big, namely makes the chord length near described junction surface elongated,
Thus make the method that the area of the pressure face near described junction surface becomes big (increase integrated value).But, if using the method,
The weight of blade can increase, it is impossible to makes propeller type fan lightweight.
On the other hand, in the propeller type fan of the present invention, as it has been described above, by using in after exterior lateral area has
The peak value of the exit angle of edge and also there is the blade of shape of peak value of hinder marginal part in inside region, it is possible to make the sky of circumference
Flow of air prevails.Therefore, in the propeller type fan of the present invention, it is possible to prop up maintaining the air making circumference flowing to account for
The aspect ratio making leaf hub in the case of joining the state of status is the least, so that propeller type fan lightweight.
Additionally, in the propeller type fan of the present invention, the exit angle of the peak of described exterior lateral area and described
The exit angle of the peak of inside region can be identical value, it is possible to for different value.In the case of different value, described outside
The exit angle of the peak in region may be greater than the value of the exit angle of the peak of described inside region, it is possible to for little
The value of exit angle in the peak of described inside region.
(2) in described propeller type fan, preferably: the maximum of the radius of curvature of the pressure face of described inside region is big
The maximum of radius of curvature in the pressure face of described exterior lateral area.
In the structure shown here, inside region maximum of radius of curvature compared with exterior lateral area is little and have the most smooth shape
Shape, therefore, particularly can reduce the sectional area of blade in inside region.Hereby it is possible to realize the lightweight of blade, and press down
The increase of volume processed.
(3) in described propeller type fan, preferably: the described pressure face of described inside region and described exterior lateral area
Described pressure face comprise concave curved surface.
In the structure shown here, the pressure face of inside region and the pressure face of exterior lateral area all comprise concave curved surface, therefore, it is possible to
Improve the effect that the air flowed along pressure face in respective region is guided circumference further.
And, in the case of possessing above-mentioned (2) and (3) the two structure, following effect can be obtained.I.e., now, outward
The maximum of the pressure face of side region is less than the maximum of pressure face of inside region, and uses the pressure face in these regions equal
Comprise the structure of concave curved surface.Big with the barometric gradient of suction surface, therefore, by inciting somebody to action close to the pressure face of the exterior lateral area of peripheral part
Its radius of curvature is set to little, it is possible to improve the effect that the air that the pressure face along exterior lateral area flows guides circumference further
Really.Its result, suppresses the generation of leakage current the most further at pressure face.
(4) in described propeller type fan, exemplified with following structure: in described inside region and described exterior lateral area
It is respectively provided with a concave curved surface, and the peak value of described exit angle respectively exists one.
(5) in described propeller type fan, preferably: at the hinder marginal part of described blade, described root-mean-square is represented comprising
The region of radial location is provided with the recess of side, edge depression forward.
In the structure shown here, rise at pressure and represent the region of root mean square radii position and be provided with recessed comprising of maximum hinder marginal part
Portion, therefore, near recess, pressure rises minimizing.Accordingly, from exterior region flow to the air of hinder marginal part side near hinder marginal part with
The mode avoiding representing root mean square radii position flows to leaf hub side and peripheral part side, is led by air-flow therefore, it is possible to improve further
Effect to circumference.
(6) air conditioner of the present invention possesses described propeller type fan.Therefore, in this air conditioner, noise is inhibited.
Symbol description
1 off-premises station
2 shells
3 outdoor heat converters
4 propeller type fans
5 motors
6 bell mouths
7 blow-off outlets
8 axial flow fans
11 leaf hubs
12 blades
12A inside region
12B exterior lateral area
13 inner peripheral portion
14 exterior regions
15 hinder marginal parts
16 peripheral parts
17 bending parts
18 edge, peripheries
19 recesses
Bottom 19a
21 pressure faces
21A inside pressure face
21B outside pressure face
22 suction surfaces
A0 rotary shaft
D direction of rotation
Rr represents root mean square radii position
θ exit angle
Claims (5)
1. a propeller type fan, possesses leaf hub (11) and the blade (12) being connected with described leaf hub (11), it is characterised in that:
Described blade (12) is in following shape: at the LHA being positioned at radial outside compared with representing root mean square radii position (Rr)
Territory (12B) has the peak value of the exit angle (θ) of hinder marginal part (15), and, representing root mean square radii position (Rr) with described
Compare the peak value being positioned at the exit angle (θ) that the inside region (12A) of radially inner side also has hinder marginal part (15),
When the exit angle (θ) of described hinder marginal part (15) is blade (12) described in circumferentially cutting, in the rear edge (15) with
Tangent line (L3) that pressure face (21) is tangent and be perpendicular to straight line (L4) angulation of rotary shaft (A0) of propeller type fan,
The described root mean square radii position (Rr) that represents is to use the representative radius R by described blade (12) and described leaf hub (11)
Represent following formula that radius r represents and calculate:
Represent root mean square radii position Rr=((R2+r2)/2)0 . 5,
In the case of the external diameter of described blade (12) is constant on rotary shaft direction, the representative radius R of described blade (12) is
/ 2nd of the external diameter of described blade (12), in external diameter inconstant situation on rotary shaft direction of described blade (12)
Under, the representative radius R of described blade (12) is minimum blade radius R1 and the meansigma methods of maximum blade radius R2,
In the case of the external diameter of described leaf hub (11) is constant on rotary shaft direction, the representative radius r of described leaf hub (11) is
/ 2nd of the external diameter of described leaf hub (11), in external diameter inconstant situation on rotary shaft direction of described leaf hub (11)
Under, the representative radius r of described leaf hub (11) is lobule hub radius r1 and the meansigma methods of maximum leaf hub radius r2,
The maximum of the radius of curvature of the pressure face (21) of described inside region (12A) is more than the pressure of described exterior lateral area (12B)
The maximum of the radius of curvature in power face (21).
Propeller type fan the most according to claim 1, it is characterised in that:
The described pressure face (21) of described inside region (12A) and described pressure face (21) bag of described exterior lateral area (12B)
Containing concave curved surface.
Propeller type fan the most according to claim 1, it is characterised in that:
It is respectively provided with a concave curved surface, and described exit angle in described inside region (12A) and described exterior lateral area (12B)
(θ) peak value respectively exists one.
Propeller type fan the most according to any one of claim 1 to 3, it is characterised in that:
At the hinder marginal part (15) of described blade (12), arrange oriented comprising the described region representing root mean square radii position (Rr)
The recess (19) of exterior region side depression.
5. an air conditioner, it is characterised in that including:
Propeller type fan (4) as claimed any one in claims 1 to 3.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012217270 | 2012-09-28 | ||
| JP2012-217270 | 2012-09-28 | ||
| PCT/JP2013/005794 WO2014050146A1 (en) | 2012-09-28 | 2013-09-27 | Propeller fan and air conditioner equipped with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104641121A CN104641121A (en) | 2015-05-20 |
| CN104641121B true CN104641121B (en) | 2016-08-31 |
Family
ID=50387577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380048377.8A Active CN104641121B (en) | 2012-09-28 | 2013-09-27 | Propeller type fan and possess the air conditioner of this propeller type fan |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20150240645A1 (en) |
| EP (1) | EP2902639B1 (en) |
| JP (1) | JP5549772B2 (en) |
| CN (1) | CN104641121B (en) |
| AU (1) | AU2013321833B2 (en) |
| BR (1) | BR112015006704B1 (en) |
| WO (1) | WO2014050146A1 (en) |
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| USD289525S (en) * | 1984-10-01 | 1987-04-28 | Industrial Tools, Inc. | Slicing machine for magnetic tape or the like |
| JP6531457B2 (en) * | 2015-03-26 | 2019-06-19 | 株式会社富士通ゼネラル | Propeller fan |
| KR102479815B1 (en) * | 2015-11-30 | 2022-12-23 | 삼성전자주식회사 | Blowing fan and air conditioner having the same |
| JP2017115768A (en) * | 2015-12-25 | 2017-06-29 | 三菱ケミカルインフラテック株式会社 | Blade for blower, and blower |
| CN109477495B (en) * | 2016-07-27 | 2020-10-30 | 夏普株式会社 | Propeller fan and fluid delivery device |
| AU2017206193B2 (en) * | 2016-09-02 | 2023-07-27 | Fujitsu General Limited | Axial fan and outdoor unit |
| CN107355425B (en) * | 2017-07-26 | 2023-04-25 | 奥克斯空调股份有限公司 | High noise cancellation degree axial flow fan blade |
| WO2019035153A1 (en) * | 2017-08-14 | 2019-02-21 | 三菱電機株式会社 | Impeller, fan, and air conditioning device |
| CN108087333A (en) * | 2017-12-08 | 2018-05-29 | 广东美的制冷设备有限公司 | Axial-flow windwheel and air conditioner |
| CN108087302A (en) * | 2017-12-08 | 2018-05-29 | 广东美的制冷设备有限公司 | Axial-flow windwheel and air conditioner |
| CN207795681U (en) * | 2018-01-13 | 2018-08-31 | 广东美的环境电器制造有限公司 | Axial flow fan leaf, axial flow fan blade component, axial flow blower ducting assembly |
| CN112041566B (en) * | 2018-06-22 | 2022-07-26 | 三菱重工发动机和增压器株式会社 | Rotary blade and centrifugal compressor provided with same |
| EP3882470A4 (en) * | 2018-11-22 | 2022-02-23 | GD Midea Air-Conditioning Equipment Co., Ltd. | Axial-flow impeller and air-conditioner having the same |
| JP2020112034A (en) * | 2019-01-08 | 2020-07-27 | パナソニックＩｐマネジメント株式会社 | Axial fan |
| EP3974659A4 (en) * | 2019-05-21 | 2022-05-11 | Mitsubishi Electric Corporation | Axial fan, blower, and refrigeration cycle apparatus |
| JP7289235B2 (en) * | 2019-07-18 | 2023-06-09 | 株式会社コロナ | Propeller fan for outdoor unit of air conditioner |
| JP7173939B2 (en) * | 2019-08-26 | 2022-11-16 | ダイキン工業株式会社 | Blower and heat pump unit |
| WO2022049665A1 (en) * | 2020-09-02 | 2022-03-10 | 三菱電機株式会社 | Axial flow fan, and indoor unit for air conditioner |
| US20240026887A1 (en) * | 2020-10-27 | 2024-01-25 | Mitsubishi Electric Corporation | Axial flow fan, air sending device, and refrigeration cycle apparatus |
| KR102401163B1 (en) | 2020-12-03 | 2022-05-24 | 엘지전자 주식회사 | An axial fan provided in an outdoor unit of an air conditioner |
| JP7093042B1 (en) * | 2021-01-21 | 2022-06-29 | ダイキン工業株式会社 | Propeller fan and air conditioner |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN104641121A (en) | 2015-05-20 |
| JP5549772B2 (en) | 2014-07-16 |
| BR112015006704B1 (en) | 2022-05-10 |
| EP2902639B1 (en) | 2019-06-26 |
| US20150240645A1 (en) | 2015-08-27 |
| AU2013321833B2 (en) | 2015-11-26 |
| EP2902639A4 (en) | 2016-05-25 |
| AU2013321833A1 (en) | 2015-04-02 |
| BR112015006704A2 (en) | 2017-07-04 |
| WO2014050146A1 (en) | 2014-04-03 |
| EP2902639A1 (en) | 2015-08-05 |
| JP2014080970A (en) | 2014-05-08 |
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