CN109915411A - Axial flow blower and air-conditioning with it - Google Patents
Axial flow blower and air-conditioning with it Download PDFInfo
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Abstract
The present invention provides a kind of axial flow blower and the air-conditioning with it, the axis stream includes rounded hub portion and the multiple blades being separately fixed on the outer peripheral surface of hub portion, blade includes adjacent the first vane region and the second vane region, first vane region is set to blade close to one end of hub portion, second vane region is set to the one end of blade far from hub portion, and the first vane region and the second vane region are distributed in using the center of hub portion as on the concentric circles in the center of circle；First vane region includes the first edge and second edge positioned at blade two sides, and the second vane region includes the third edge and the 4th edge for being located at blade two sides, and first edge and third edge are set to the leading edge of leaf, and second edge and the 4th edge are set to the trailing edge of blade；First edge is protruded along a protrusion, third edge is formed radially in diametrically first edge along a recess, second edge is formed radially, and the 4th edge and second edge form one far from one end of hub portion and be recessed, and achievees the purpose that reduce noise of axial flow fan.
Description
Technical field
The present invention relates to blower field more particularly to a kind of axial flow blower and with its air-conditioning.
Background technique
As shown in Figure 1, axial flow blower includes the blade 2 ' of hub portion 1 ' and connection 1 ' outer peripheral surface of hub portion, for blade 2 '
Two sides of hub portion 1 ' are connected, wherein a side is continuous arc-shaped recess, another side is that continuous arc is convex
It rises.In blade rotary course, the position remoter from 1 ' radial direction of hub portion of blade 2 ', local rotation speed is bigger, corresponding
Blade surface pressure oscillation intensity it is stronger, the noise of generation is also bigger.According to noise synthesis mechanism, the noise master of axial flow blower
Want contribution amount from the maximum region of noise on blade 2 ', therefore the noise of axial flow fan in Fig. 1 is mainly distributed on the outer of blade 2 '
Collar region, and since the noise that outer collar region generates is larger, therefore the noise of axial flow blower is also larger.
Summary of the invention
The present invention provides a kind of axial flow blower and the air-conditioning with it.
Specifically, the present invention is achieved through the following technical solutions:
According to the first aspect of the invention, a kind of axial flow blower is provided, comprising:
Hub portion, the hub portion are rounded；And
The multiple blades being separately fixed on the outer peripheral surface of the hub portion, the blade include the first adjacent vane region
With the second vane region, wherein first vane region is set to the blade close to one end of the hub portion, second blade
Area is set to the one end of the blade far from the hub portion, and first vane region and second vane region are distributed in institute
The center for stating hub portion is on the concentric circles in the center of circle；
First vane region includes the first edge and second edge positioned at blade two sides, and second vane region includes
Positioned at the third edge and the 4th edge of blade two sides, the first edge and the third edge are before the blade
Edge, the third edge and the 4th edge are set to the trailing edge of the blade；
Wherein, the first edge is along being formed radially a recess, and the second edge is along being formed radially a protrusion, institute
Third edge is stated in the diametrically first edge protrusion, the 4th edge and the second edge are far from the hub portion
One end formed one recess.
Optionally, the difference of the radius of the radius and hub portion of the corresponding concentric circles in first vane region, with institute
The ratio for stating the difference of the radius of the corresponding concentric circles in the second vane region and the radius of the hub portion is greater than 55% and is less than
85% and/or, the most inner side of the first edge and the line in the center of circle, with the outermost at the third edge and the line in the center of circle
Angle be greater than 10 degree and less than 25 degree；And/or
The outermost of the second edge and the line in the center of circle are big with the angle of the outermost line at the 4th edge
In 5 degree and less than 15 degree.
Optionally, one end by the blade close to one end of the hub portion to the blade far from the hub portion,
The distribution curve of the turning angle of the blade radially is changed to parabolic segment by straightway, wherein the straightway is in incremental
Trend, the parabolic segment is corresponding parabolical opening down, and the parabolic segment includes the parabolical vertex.
Optionally, the parabolical equation are as follows:
Y=A- (X-B)2；
Wherein,
X is the radial position of the blade after normalization；
RiFor the radial position of the blade；
RhFor the radius of the corresponding concentric circles in second vane region；
RsFor the radius of the hub portion；
(A, B) is the parabolical vertex, and wherein A is the maximum deflection angle angle of blade, and B is that maximum deflection angle is corresponding
In the radial position of blade.
Optionally, A is greater than or equal to 23 ° and is less than or equal to 28 °；And/or
B is greater than or equal to 6 and is less than or equal to 8；And/or
C is greater than or equal to 10 ° and is less than or equal to 15 °, and wherein C is the corresponding blade of starting point of the straightway
Deflection angle.
Optionally, at least one of the third edge and the 4th edge include multiple continuous sawtooth.
Optionally, the shape of the sawtooth is sine curve.
Optionally, multiple sawtooth at the third edge such as are at amplitudes or the amplitudes such as non-；And/or
Multiple sawtooth at the 4th edge such as are at amplitudes or the amplitudes such as non-.
Optionally, the sinusoidal formula is as follows:
A′*sin(x/P)；
Wherein, x is the sawtooth in radial position, and A ' is the amplitude of the sawtooth, and P is the first empirical coefficient.
Optionally, for the sawtooth at the third edge, A ' is greater than or equal to 4mm and is less than or equal to 8mm, P be greater than or
Equal to 0.6 and it is less than or equal to 1.2；And/or
For the sawtooth at the 4th edge, A ' is greater than or equal to 2mm and is less than or equal to 6mm, and P is greater than or equal to 0.8
And it is less than or equal to 1.4.
According to the second aspect of the invention, a kind of air-conditioning, including outdoor machine of air-conditioner are provided, wherein the outdoor machine of air-conditioner includes
Drive system and the described in any item axial flow blowers of above-mentioned first aspect, the drive system is for driving the axial flow blower
Rotation.
By the above technical solution provided in an embodiment of the present invention as it can be seen that blade is divided into the first vane region (inner ring) by the present invention
Low turn is improved by the rational design of the blade turning angle of the first vane region and the second vane region with the second vane region (outer ring)
The stress size of first vane region of speed, and the stress size of high-revolving second vane region is accordingly reduced, it in this way can be effective
The pressure pulse strength on entire blade is reduced, to reduce the noise of axial flow blower；Also, blade Internal and external cycle entirety stress
It is unaffected, it can guarantee that axial flow blower total blast volume is constant, the distribution of blade Internal and external cycle pressure is more uniform, to further increase
Axial flow blower efficiency.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
It can the limitation present invention.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention
Example, and be used to explain the principle of the present invention together with specification.
Fig. 1 is the structural schematic diagram of one of the relevant technologies axial flow blower；
Fig. 2 is a kind of structural schematic diagram of axial flow blower shown in an exemplary embodiment of the invention；
Fig. 3 A is a kind of perspective view of axial flow blower shown in an exemplary embodiment of the invention；
Fig. 3 B is a kind of another structural schematic diagram of axial flow blower shown in an exemplary embodiment of the invention；
Fig. 3 C is exploded view of the blade shown in Fig. 3 B in the deflection angle in the face C-C；
Fig. 3 D is the deflection angle of blade shown in Fig. 3 B, right by one end of close hub portion to one end far from hub portion 1
The In The Radial Spreading Curve schematic diagram answered；
Fig. 3 E is a kind of structural schematic diagram of the axial flow blower shown in an exemplary embodiment of the invention in other direction；
Fig. 3 F is the partial enlarged view of Fig. 3 E；
Fig. 4 A is a kind of structural schematic diagram of the axial flow blower shown in an exemplary embodiment of the invention in another direction；
Fig. 4 B is the structural schematic diagram of part A in the axial flow blower of Fig. 3 A illustrated embodiment；
Fig. 4 C is the structural schematic diagram of part B in the axial flow blower of Fig. 3 A illustrated embodiment；
Fig. 5 is a kind of perspective view of axial flow blower shown in an exemplary embodiment of the invention；
Fig. 6 A is the axis stream wind based on Fukano tail whirlpool noise model to axial flow blower of the invention and in the related technology
The prediction result comparison diagram of machine progress noise analysis prediction；
Fig. 6 B is the noise test result and the relevant technologies of a kind of axial flow blower shown in an exemplary embodiment of the invention
In axial flow blower noise test result comparison diagram, disclose corresponding axial flow blower sound pressure level frequency spectrum distribution results figure；
Fig. 6 C is the partial schematic diagram of Fig. 6 B.
Appended drawing reference:
1: hub portion；2: blade；21: the first vane regions；211: first edge；212: second edge；22: the second blades
Area；221: third edge；222: the four edges.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistented with the present invention.On the contrary, they be only with it is such as appended
The example of device and method being described in detail in claims, some aspects of the invention are consistent.
It is only to be not intended to limit the invention merely for for the purpose of describing particular embodiments in terminology used in the present invention.
It is also intended in the present invention and the "an" of singular used in the attached claims, " described " and "the" including majority
Form, unless the context clearly indicates other meaning.It is also understood that term "and/or" used herein refers to and wraps
It may be combined containing one or more associated any or all of project listed.
It will be appreciated that though various information, but this may be described using term first, second, third, etc. in the present invention
A little information should not necessarily be limited by these terms.These terms are only used to for same type of information being distinguished from each other out.For example, not departing from
In the case where the scope of the invention, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as
One information.Depending on context, word as used in this " if " can be construed to " ... when " or " when ...
When " or " in response to determination ".
With reference to the accompanying drawing, it is described in detail to axial flow blower of the invention and with its air-conditioning.What is do not conflicted
In the case of, the feature in following embodiment and embodiment can be combined with each other.
In conjunction with Fig. 2, Fig. 3 A- Fig. 3 B, Fig. 3 E, Fig. 4 A and Fig. 5, the embodiment of the present invention provides a kind of axial flow blower, the axis
Flow fan may include hub portion 1 and multiple blades 2, wherein hub portion 1 is rounded, and multiple blades 2 are separately fixed at hub portion
Multiple blades 2 on 1 outer peripheral surface.The quantity of blade 2 can select as needed, for example, 3,4.It is multiple in the present embodiment
Blade 2 is arranged at intervals on the outer peripheral surface of hub portion 1.
Referring to fig. 2, blade 2 may include the first vane region 21 (i.e. root or blade inner ring) and 22 (i.e. leaf of the second vane region
Piece outer ring), the first vane region 21 and adjacent with the second vane region 22, the first vane region 21 is set to blade 2 close to hub portion 1
One end, the second vane region 22 are set to the one end of blade 2 far from hub portion 1.In the present embodiment, the first vane region 21 and the second blade
It is on the concentric circles in the center of circle with the center of hub portion 1 (i.e. the center of circle of hub portion 1) that area 22, which is distributed in,.Optionally, blade 2 is separate
The outer edge of one end of hub portion 1 is also distributed about on the concentric circles at 22 place of the second vane region.
Further, referring again to Fig. 2, the first vane region 21 may include 211 He of first edge positioned at 2 two sides of blade
Second edge 212, the second vane region 22 include positioned at the third edge 221 and the 4th edge 222 of 2 two sides of blade, first edge
211 and third edge 221 be set to blade 2 leading edge (i.e. the inlet side of blade 2), second edge 212 and the 4th edge 222 are set to
The trailing edge (i.e. the air side of blade 2) of blade 2, that is, on same blade 2, where first edge 211 and third edge 221
Blade side is oppositely arranged with the blade side where second edge 212 and the 4th edge 222.It should be noted that of the invention
In embodiment, 2 two sides of blade refer to two sides being connected on blade 2 with hub portion 1.
In the present embodiment, first edge 211 forms a recess, second edge 212 along radial (i.e. the radial direction of blade 2)
Along a protrusion is formed radially, third edge 221 is protruded in diametrically first edge 211, the 4th edge 222 and second edge
212 one end far from hub portion 1 form a recess.
It is (outer to be divided into the first vane region 21 (inner ring) and the second vane region 22 by the axial flow blower of the embodiment of the present invention for blade 2
Circle), by the rational design of the blade turning angle of the first vane region 21 and the second vane region 22, improve the first blade of the slow-speed of revolution
The stress size in area 21, and accordingly reduce high-revolving second vane region 22 stress size (compared to the axial flow blower in Fig. 1,
The total stress size of the blade 2 of the axial flow blower of the embodiment of the present invention has not been changed or changes smaller), it can be effectively reduced so whole
Pressure pulse strength on a blade, to reduce the noise of axial flow blower；Also, blade Internal and external cycle entirety stress is not by shadow
It rings, can guarantee that axial flow blower total blast volume is constant, the distribution of blade Internal and external cycle pressure is more uniform, effectively reduces entire blade 2
On pressure artery, to further increase axial flow blower efficiency.
The rotation direction (arrow direction in Fig. 2) of the axial flow blower of the present embodiment is the 4th edge 222 of blade 2 to the
The setting direction at three edges 221 namely the rotation direction of axial flow blower along blade 2 the 4th edge 222 to third edge 221
Setting direction；The rotation direction of axial flow blower is the second edge 212 of blade 2 to the setting side of first edge 211 in other words
To namely axial flow blower rotation direction along blade 2 second edge 212 to first edge 211 setting direction.
In certain embodiments, the difference L of the radius of the radius and hub portion 1 of the corresponding concentric circles in the first vane region 211
The difference L of the radius of the radius and hub portion 1 of (as shown in Figure 2) concentric circles corresponding with the second vane region 220(as shown in Figure 2)
Ratio be greater than 55% and less than 85% namely 55% < L1/L0< 85%, e.g., L1/L0Can for 56%, 57%, 58%,
59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%,
74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83% or 84%, can also for other be greater than 55% and
Numerical values recited less than 85%.
In certain embodiments, the line of the most inner side of first edge 211 and the center of circle, the outermost with third edge 221
With the angle theta of the line in the center of circle1It is (as shown in Figure 2) to be greater than 10 degree and less than 25 degree, for example, θ1Can for 11 degree, 12 degree, 13 degree,
14 degree, 15 degree, 16 degree, 17 degree, 18 degree, 19 degree, 20 degree, 21 degree, 22 degree, 23 degree or 24 degree, or other are greater than 10 degree
And the numerical values recited less than 25 degree, it can specifically select according to actual needs.
In certain embodiments, the line of the outermost of second edge 212 and the center of circle, the outermost with the 4th edge 222
Line angle theta2Greater than 5 degree and less than 15 degree, for example, θ2Can for 6 degree, 7 degree, 8 degree, 9 degree, 10 degree, 11 degree, 12 degree,
13 degree or 14 degree, or other are greater than 5 degree and the numerical values recited less than 15 degree, can specifically select according to actual needs.
Optionally, first edge 211 is arc-shaped and/or second edge 212 is arc-shaped, and the edge of arc can further subtract
Small noise.As a kind of feasible implementation, and combine Fig. 2, Fig. 3 A, Fig. 4 A and Fig. 5, first edge 211 and the second side
Edge 212 is arc-shaped.
Further, the blade 2 of the embodiment of the present invention is not generally in same plane.
Specifically, in conjunction with Fig. 3 A to Fig. 3 F, by blade 2 close to one end of hub portion 1 to blade 2 far from hub portion 1 one
End, the distribution curve of the turning angle of blade 2 radially are changed to parabolic segment by straightway.Wherein, straightway is in increasing trend
(such as Fig. 3 F), parabolic segment is corresponding parabolical opening down, and parabolic segment includes parabolical vertex.Optionally, it throws
The corresponding parabola of object line segment is symmetrical structure.
In the embodiment of the present invention, for same circumference C-C, the up-front intersection point of C-C and blade 2 is Le, the tail with blade 2
The intersection point of edge is Te, and Fig. 3 B can be understood as periphery corresponding to C-C and be formed by orthogonal cylindrical plane after orthogonal transformation,
Wherein, the angle β between the end Le and C-CLeAngle β between the end Te and C-CTeThe difference between the two (βLe-βTe), it can be understood as
Deflection angle of the Te with respect to edge Le at the trailing edge in the face C-C of blade 2.It should be noted that the blade of the embodiment of the present invention
Deflection angle of the Te with respect to edge Le at the trailing edge in the face C-C of 2 turning angle Y namely blade 2.It is further to note that
In the embodiment of the present invention, parabolic segment may include and the curved shape of the deviation of parabolic shape smaller (be less than predetermined deviation threshold value)
Shape may also comprise the curve shape of parabolic shape coincidence.
As a kind of feasible implementation, parabolical equation can be following formula:
Y=A- (X-B)2 (1)
In formula (1),
X is the radial position of the blade after normalization；
RiFor the radial position of the blade；
RhFor the radius of the corresponding concentric circles in second vane region；
RsFor the radius of the hub portion；
(A, B) is the parabolical vertex, and wherein A is the maximum deflection angle angle of blade, and B is that maximum deflection angle is corresponding
In the radial position of blade.
Wherein, A is greater than or equal to 23 ° and is less than or equal to 28 ° and/or B more than or equal to 6 and less than or equal to 8, and/
Or C is greater than or equal to 10 ° and is less than or equal to 15 °.
Optionally, in certain embodiments, A is greater than or equal to 23 ° (angular unit, degree) and is less than or equal to 28 °, e.g., A
It can be 23 °, 23.5 °, 24 °, 24.5 °, 25 °, 25.5 °, 26 °, 26.5 °, 27 °, 27.5 °, 28 °.Certainly, A can also be big for other
In 23 ° and less than the degree size between 28 °.
Optionally, in certain embodiments, B is greater than or equal to 6 and is less than or equal to 8, e.g., B can for 6,6.5,7,7.5,
8.Certainly, B can also for other be greater than 6 and less than 8 between numerical values recited.
Optionally, in certain embodiments, C is greater than or equal to 10 ° and is less than or equal to 15 °, and wherein C is the straight line
The deflection angle of the corresponding blade of starting point of section.Such as, C can for 10 °, 10.5 °, 11 °, 11.5 °, 12 °, 12.5 °, 13 °,
13.5 °, 14 °, 14.5 °, 15 ° or other be greater than 10 ° and less than the degree size between 15 °.
It is appreciated that parabolical equation is not limited to above-mentioned formula (1), it can be also the deformation of formula (1) or other throwings
Object line equation.
It please recombine Fig. 2, Fig. 3 A, Fig. 4 A to Fig. 4 B and Fig. 5, in third edge 221 and the 4th edge 222 at least
One includes multiple continuous sawtooth.Optionally, third edge 221 and the 4th edge 222 respectively include multiple continuous saws
Tooth, wherein the sawtooth at third edge 221 can inhibit in 2 rotary course of blade with other static component stator-rotor interactions, for example, axis
Flow fan is applied on air-conditioning, and the sawtooth at third edge 221 can inhibit dynamic with static component in air-conditioning in 2 rotary course of blade
Quiet interference；The sawtooth at the 4th edge 222 can guarantee good sound quality characteristic.
In following embodiments, third edge 221 and the 4th edge 222 respectively include multiple continuous sawtooth.
The shape of sawtooth can design as needed, for example, in some embodiments, as shown in figs. 4 b and 4 c, sawtooth
Shape is sine curve, and the sawtooth of the shape can reduce the stress size of the second vane region 22, to reduce the second vane region 22
Noise.It should be noted that sine curve may include and the deviation of sinusoidal shape is smaller (small in the embodiment of the present invention
In predetermined deviation threshold value) curve shape, may also comprise sine curve coincidence curve shape.
Optionally, multiple sawtooth at third edge 221 are etc. that amplitudes, structure design are simple；Optionally, third edge
221 multiple sawtooth are the amplitudes such as non-, for example, the amplitude for being located at the sawtooth at the both ends at third edge 221, which is less than, is located at third
The amplitude of the sawtooth at the middle part at edge 221 is conducive to inhibit to reduce in 2 rotary course of blade with other static component stator-rotor interactions
The stress size at third edge 221.
Optionally, multiple sawtooth at third edge 221 are etc. that amplitudes, structure design are simple；Optionally, third edge
221 multiple sawtooth are the amplitudes such as non-, for example, the amplitude for being located at the sawtooth at the both ends at the 4th edge 222, which is less than, is located at the 4th
The amplitude of the sawtooth at the middle part at edge 222 is conducive to inhibit to reduce in 2 rotary course of blade with other static component stator-rotor interactions
The stress size at the 4th edge 222.
As a kind of feasible implementation, it is less than positioned at the amplitude of the sawtooth at the both ends at third edge 221 and is located at third
The amplitude of the sawtooth at the middle part at edge 221, and the amplitude for being located at the sawtooth at the both ends at the 4th edge 222 is less than positioned at the 4th edge
The amplitude of the sawtooth at 222 middle part.
Optionally, sinusoidal formula is as follows:
A′*sin(x/P) (2)；
In formula (2), x is sawtooth in radial position, and A ' is the amplitude of sawtooth, and P is the first empirical coefficient.
In certain embodiments, for the sawtooth at third edge 221, A ' is greater than or equal to 4mm and is less than or equal to 8mm, P
More than or equal to 0.6 and be less than or equal to 1.2, for example, A ' may include 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm,
7.5mm, 8mm may also include other greater than 4mm and be less than the numerical value of 8mm；P may include 0.6,0.65,0.7,0.75,0.8,
0.85,0.9,0.95,1,1.05,1.1,1.15,1.2, it may also include other greater than 0.6 and the numerical value less than 1.2.
In certain embodiments, for the sawtooth at the 4th edge 222, A ' is greater than or equal to 2mm and is less than or equal to 6mm, P
More than or equal to 0.8 and be less than or equal to 1.4, such as A ' may include 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm,
5.5mm, 6mm may also include other greater than 2mm and be less than the numerical value of 6mm；P may include 0.8,0.85,0.9,0.95,1,
1.05,1.1,1.15,1.2,1.25,1.3,1.35,1.4, it may also include other greater than 0.8 and the numerical value less than 1.4.
In certain embodiments, for the sawtooth at third edge 221, A ' is greater than or equal to 4mm and is less than or equal to 8mm, P
More than or equal to 0.6 and it is less than or equal to 1.2；And for the sawtooth at the 4th edge 222, A ' be greater than or equal to 2mm and be less than or
It is greater than or equal to 0.8 equal to 6mm, P and is less than or equal to 1.4.
It is appreciated that sine curve is not limited to formula (1), it can also be other, such as the deformation of formula (1).
Certainly, the shape of sawtooth is not limited to sine curve, or other arcs or non-arc.
Fig. 6 A is the axis stream wind based on Fukano tail whirlpool noise model to axial flow blower of the invention and in the related technology
The prediction result comparison diagram of machine (axial flow blower of planform shown in Fig. 1) progress noise analysis prediction；Fig. 6 B is the present invention one
A kind of noise test result (curve 10 in Fig. 6 B) of axial flow blower shown in exemplary embodiment and axis in the related technology
The comparison diagram of the noise test result (curve 10 ' in Fig. 6 B) of flow fan, that is, Fig. 6 B is the noise that actual test determines
Test result comparison diagram；Fig. 6 C is the partial schematic diagram of Fig. 6 B.
Specifically, using the axial flow blower of the Fukano tail whirlpool noise model analysis embodiment of the present invention such as formula (3)
Noise and axial flow blower in the related technology noise, Fukano tail whirlpool noise model is as follows:
In formula (3), E is noise power, unit W；
ρ0For Media density, the corresponding medium of blower of the present invention is air, unit kg/m3；
c0For the velocity of sound, unit m/s；
I is the flabellum quantity of blade 2, and the axial flow blower of the embodiment of the present invention and axial flow blower in the related technology include
3 blades；
R is radius, unit m；
rhFor the radius of 2 first vane region of blade, unit m；
rtFor the radius of 2 second vane region of blade, unit m；
D is tail whirlpool width, unit m；
W is tail whirlpool relative velocity, unit m/s；
L is apart from blower position, unit m；
For the acoustic sound pressure of the blade 2 of the embodiment of the present invention, can be determined according to the first two formula in formula (3)；
p0For acoustic reference acoustic pressure, size 2e-5Pa；
SPL is noise sound size, the i.e. ordinate of Fig. 6 A, unit dB.
For the axial flow blower of axial flow blower and the embodiment of the present invention in the related technology, proceed as follows:
Blade is radially divided into 5 parts, from the outer peripheral surface close to hub portion to the side of the outer peripheral surface far from hub portion
To, respectively the region of Span 0~20%, the region of Span 20~40%, the region of Span 40~60%, Span 60~
80% region and the region of Span 80~100%.
Every part in Fig. 6 A, the noise that the square column in left side is used to indicate axial flow blower corresponding part in the related technology are pre-
It surveys as a result, the square column on right side is used to indicate the noise-predictive result of the axial flow blower corresponding part of the embodiment of the present invention.
By Fig. 6 A it is found that compared to axial flow blower in the related technology, the axial flow blower span40% of the embodiment of the present invention~
80% noise region value suitably increases, and the noise region of span 80%~100% declines to a great extent, axial flow blower different leaves 2
The noise profile at position is more reasonable；Total noise level of axial flow blower in the related technology is 71.7dB, the embodiment of the present invention
Total noise level of axial flow blower be 70.0dB, total noise of the axial flow blower of the embodiment of the present invention declines 1.7dB.
Further, the axial flow blower of axial flow blower and the embodiment of the present invention in the related technology is separately mounted to complete machine
It is tested in (air-conditioning system), test result can be found in Fig. 6 B and Fig. 6 C, wherein curve 10 ' is axis stream in the related technology
The sound pressure level curve of blower (conventional design) at different frequencies, curve 10 be the embodiment of the present invention axial flow blower (mixing is set
Meter) sound pressure level curve at different frequencies, the ordinate of Fig. 6 B and Fig. 6 C are noise sound size SPL, unit dBA；
Abscissa is sound frequency, unit Hz.By Fig. 6 B and Fig. 6 C it is found that the noise of axial flow fan of the embodiment of the present invention is in low frequency model
It is obvious to enclose interior noise reduction.In figure 6 c within the scope of 200~600Hz, sound pressure level size declines 5~10dB at blade passing frequency.Phase
Than the axial flow blower of the relevant technologies, the sound quality of the axial flow blower of the embodiment of the present invention is more preferable, and final total noise of centrifuge decline~
1dBA。
As it can be seen that the axial flow blower of the embodiment of the present invention, passes through the edge shape of the first vane region 21 and the second vane region 22
Rational design, reduce the noise of axial flow blower；Further, it is possible to guarantee that axial flow blower total blast volume is constant, effectively reduce whole
Pressure artery on a blade 2, to improve axial flow blower efficiency.
It is noted that the axial flow blower of the embodiment of the present invention can be applicable on air-conditioning, it is also applicable in other needs
In the equipment of blower.
The embodiment of the present invention also provides a kind of air-conditioning, including outdoor machine of air-conditioner, wherein outdoor machine of air-conditioner include drive system and
The axial flow blower of above-described embodiment, drive system is for driving axial flow blower to rotate.
Optionally, drive system includes motor, and the main shaft of motor and the hub portion 1 of axial flow blower connect, drive shaft stream wind
Machine rotation.Certainly, other dynamical systems also may be selected in drive system, are not limited to motor.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Claims (10)
1. a kind of axial flow blower characterized by comprising
Hub portion, the hub portion are rounded；And
The multiple blades being separately fixed on the outer peripheral surface of the hub portion, the blade include adjacent the first vane region and the
Two vane regions, wherein first vane region is set to the blade close to one end of the hub portion, and second vane region is set
In the one end of the blade far from the hub portion, and first vane region and second vane region are distributed in the wheel
The center of hub is on the concentric circles in the center of circle；
First vane region includes the first edge and second edge positioned at blade two sides, and second vane region includes being located at
The third edge and the 4th edge of blade two sides, the first edge and the third edge are set to the leading edge of the blade, institute
It states second edge and the 4th edge is set to the trailing edge of the blade；
Wherein, the first edge is along being formed radially a recess, and the second edge is along being formed radially a protrusion, and described the
Three edges in diametrically first edge protrusion, the 4th edge and the second edge far from the hub portion one
End forms a recess.
2. axial flow blower according to claim 1, which is characterized in that the radius of the corresponding concentric circles in first vane region
With the difference of the radius of the hub portion, the radius of concentric circles corresponding with second vane region and the radius of the hub portion
The ratio of difference be greater than 55% and less than 85%；And/or
The most inner side of the first edge and the line in the center of circle, the angle with the line of the outermost and center of circle at the third edge
Greater than 10 degree and less than 25 degree；And/or
The outermost of the second edge and the line in the center of circle are greater than 5 with the angle of the outermost line at the 4th edge
It spends and less than 15 degree.
3. axial flow blower according to claim 1, which is characterized in that by the blade close to one end of the hub portion extremely
The one end of the blade far from the hub portion, the distribution curve of the turning angle of the blade radially are changed to throwing by straightway
Object line segment, wherein the straightway is in increasing trend, and the parabolic segment is corresponding parabolical opening down, and the throwing
Object line segment includes the parabolical vertex.
4. axial flow blower according to claim 3, which is characterized in that the parabolical equation are as follows:
Y=A- (X-B)2；
Wherein,
X is the radial position of the blade after normalization；
RiFor the radial position of the blade；
RhFor the radius of the corresponding concentric circles in second vane region；
RsFor the radius of the hub portion；
(A, B) is the parabolical vertex, and wherein A is the maximum deflection angle angle of blade, and B is that maximum deflection angle is corresponding in leaf
The radial position of piece.
5. axial flow blower according to claim 4, which is characterized in that A is greater than or equal to 23 ° and is less than or equal to 28 °；
And/or
B is greater than or equal to 6 and is less than or equal to 8；And/or
C is greater than or equal to 10 ° and is less than or equal to 15 °, and wherein C is the turnover of the corresponding blade of starting point of the straightway
Angle.
6. axial flow blower according to claim 1, which is characterized in that in the third edge and the 4th edge extremely
Few one includes multiple continuous sawtooth.
7. axial flow blower according to claim 6, which is characterized in that the shape of the sawtooth is sine curve.
8. axial flow blower according to claim 7, which is characterized in that the sinusoidal formula is as follows:
A′*sin(x/P)；
Wherein, x is the sawtooth in radial position, and A ' is the amplitude of the sawtooth, and P is the first empirical coefficient.
9. axial flow blower according to claim 8, which is characterized in that for the sawtooth at the third edge, A ' be greater than or
Equal to 4mm and it is less than or equal to 8mm, P is greater than or equal to 0.6 and is less than or equal to 1.2；And/or
For the sawtooth at the 4th edge, A ' is greater than or equal to 2mm and is less than or equal to 6mm, and P is more than or equal to 0.8 and small
In or equal to 1.4.
10. a kind of air-conditioning, which is characterized in that including outdoor machine of air-conditioner, wherein the outdoor machine of air-conditioner includes drive system and right
It is required that 1 to 9 described in any item axial flow blowers, the drive system is for driving the axial flow blower to rotate.
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| CN201910336042.5A CN109915411B (en) | 2019-04-24 | 2019-04-24 | Axial fan and air conditioner with same |
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| CN201910336042.5A CN109915411B (en) | 2019-04-24 | 2019-04-24 | Axial fan and air conditioner with same |
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| CN109915411B CN109915411B (en) | 2024-03-22 |
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| WO2021017153A1 (en) * | 2019-07-31 | 2021-02-04 | 广东美的制冷设备有限公司 | Axial-flow fan blade, axial-flow fan, and air conditioner |
| CN115111193A (en) * | 2021-03-17 | 2022-09-27 | 西罗卡电器有限公司 | Rotary blade fan, fan and circulator |
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| CN208185060U (en) * | 2018-05-04 | 2018-12-04 | 广东美的制冷设备有限公司 | Axial-flow windwheel, air-conditioner outdoor unit and air conditioner |
| CN209892505U (en) * | 2019-04-24 | 2020-01-03 | 特灵空调系统(中国)有限公司 | Axial fan and air conditioner with same |
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| WO2021017153A1 (en) * | 2019-07-31 | 2021-02-04 | 广东美的制冷设备有限公司 | Axial-flow fan blade, axial-flow fan, and air conditioner |
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| Publication number | Publication date |
|---|---|
| CN109915411B (en) | 2024-03-22 |
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