CN109723672B - Axial flow fan blade and axial flow fan - Google Patents
Axial flow fan blade and axial flow fan Download PDFInfo
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Abstract
The invention relates to an axial flow fan blade and an axial flow fan, comprising a hub and blades connected with the side wall of the hub, wherein the hub is provided with a first side wall and a second side wall which are connected with each other along the axial direction of the hub; the first sidewall is inclined inwardly at an angle of 17 ° -23 ° to the hub axis in a direction away from the second sidewall. The side wall of the hub is designed to be partially inclined inwards, so that wind resistance can be effectively reduced, and the fan blades connected with the side wall of the hub extend to the inwards inclined part of the hub, so that the windward area of the fan blades is increased; the wind resistance is reduced, the windward area is increased, the air supply capacity and the air supply quantity are greatly improved, and the angle of 17-23 degrees is convenient for production and can provide relatively large air supply quantity.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to an axial flow fan blade and an axial flow fan.
Background
With the continuous improvement of life quality, the requirements of people on the environment are higher and higher. People pay attention to the safety of the outdoor environment, and meanwhile, the comfort of the indoor environment is also emphasized. For indoor environment adjustment, the most commonly used over air conditioner can adjust indoor temperature, humidity and the like, so that people can enjoy healthy and comfortable temperature and humidity environments all the year round. An air conditioner is generally divided into an outdoor unit and an indoor unit, wherein an axial flow fan is required to supply air and dissipate heat in the outdoor unit, but the axial flow fan has two problems in the operation process, namely high noise and insufficient air supply quantity. While not addressing the two problems described above, many improvements have been made or accomplished. However, the axial flow fans with better noise reduction generally have lower air supply quantity, and are difficult to meet the air supply requirement; the axial flow fan with larger air supply quantity has larger noise and seriously affects the sound environment.
Therefore, it is necessary to provide an axial flow fan blade and an axial flow fan to solve the deficiencies of the prior art.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an axial flow fan blade and an axial flow fan.
The axial flow fan blade comprises a hub and blades connected with the side walls of the hub, wherein the hub is provided with a first side wall and a second side wall which are connected with each other along the axial direction of the hub;
The first sidewall is inclined inwardly at an angle of 17 ° -23 ° to the hub axis in a direction away from the second sidewall.
Further, the ratio of the lengths of the first side wall and the second side wall in the axial direction of the hub is 0.4-0.5.
Further, the hub comprises a hollow cylinder and a hollow round table which are mutually connected along the axial direction of the hub, the side surface of the hollow round table forms the first side wall, and the side surface of the hollow cylinder forms the second side wall.
Further, the first side wall and the second side wall are sequentially arranged along the airflow direction.
Further, the blade is provided with a first side edge and a second side edge which are oppositely arranged, and the first side edge and the second side edge are distributed along the airflow direction;
the second side edge sequentially comprises a first section, a second section, a third section and a fourth section along the direction far away from the axis of the hub, the connection point of the first section and the hub is a first critical point, the connection point of the first section and the second section is a second critical point, the connection point of the second section and the third section is a third critical point, and the connection point of the third section and the fourth section is a fourth critical point;
in the direction away from the axial direction of the hub, the first section extends in the direction away from the first side edge, a plane perpendicular to the axis of the hub is a first plane, and an included angle between a straight line between the first critical point and the second critical point and the first plane is 6-10 degrees;
The first section is in a straight line or an arc line.
Further, the first section is an arc with a radius of 140-165 mm.
Further, the first section is an arc with a radius of 150 mm.
Further, in a direction perpendicular to the axis of the hub, a length of a straight line between the first critical point and the second critical point is a first length, and a length of a straight line between the first critical point and the fourth critical point is a second length;
the ratio of the first length to the second length ranges from 1:2 to 1:4.
Further, the ratio of the first length to the second length is 1:3.
Further, the second section and the third section form a curve recessed toward the first side, and the third critical point is a point closest to the first side in the curve;
the third critical point is in the same first plane as the first critical point.
Further, a distance between the first plane where the second critical point is located and the first plane where the third critical point is located is 15-23mm.
Further, the blade is provided with a third side edge and a fourth side edge which are oppositely arranged, and the first side edge, the third side edge, the second side edge and the fourth side edge are connected end to end in sequence; the third side edge is connected with the side wall of the hub, and the connection point of the fourth section and the fourth side edge is a fifth critical point;
In the direction perpendicular to the axis of the hub, the length of the straight line between the second critical point and the fourth critical point is a third length, and the length of the straight line between the first critical point and the fifth critical point is a fourth length;
the ratio of the third length to the fourth length ranges from 2.5:5 to 3.5:5.
Further, the ratio of the third length to the fourth length is 3:5.
Further, the radius of the circumference where the second critical point is located is 78-85mm;
The radius of the circumference where the third critical point is located is 78-85mm.
Further, the fourth critical point is a point of the second side edge farthest from the first side edge; the fourth section is an arc with the radius of 8-12 mm.
Further, the fourth section is an arc with the radius of 10 mm.
Based on the same thought, the invention also provides an axial flow fan which comprises the axial flow fan blade.
Compared with the closest prior art, the technical scheme of the invention has the following advantages:
According to the axial flow fan blade provided by the technical scheme provided by the invention, the side wall of the hub is designed to be partially inclined inwards, so that the wind resistance can be effectively reduced, and the fan blade connected with the side wall of the hub extends to the inwards inclined part of the hub, so that the windward area of the fan blade is increased; the wind resistance is reduced, the windward area is increased, the air supply capacity and the air supply quantity are greatly improved, and the angle of 17-23 degrees is convenient for production and can provide relatively large air supply quantity.
Drawings
FIG. 1 is a schematic structural view of an axial flow fan blade according to the present invention;
FIG. 2 is a schematic view of another direction of an axial flow fan blade according to the present invention;
FIG. 3 is a front view of a hub of an axial flow fan blade provided by the invention;
fig. 4 is a schematic structural view of a fan blade of the axial flow fan blade provided by the invention.
Wherein 1-a first sidewall; 2-a second sidewall; 3-wheel hubs; 4-leaf blades; 5-a first critical point; 6-a second critical point; 7-a third critical point; 8-fourth critical point; 9-a fifth critical point; 10-a first side; 11-a second side; 12-a third side; 13-fourth side; 14-a hollow cylinder; 15-hollow round table.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 to 4, the present invention provides an axial flow fan blade, comprising a hub 3 and blades 4 connected to the side walls of the hub 3, wherein the hub 3 has a first side wall 1 and a second side wall 2 connected to each other along the axial direction thereof;
in a direction away from the second side wall 2, the first side wall 1 is inclined inwardly at an angle of 17 ° -23 ° to the axis of the hub 3.
By designing the side wall of the hub 3 to be inclined inwards, wind resistance can be effectively reduced, and the blades 4 connected with the side wall of the hub 3 extend to the inwards inclined part of the hub 3, so that the windward area of the blades 4 is increased; the wind resistance is reduced and the windward area is increased, so that the air supply capacity and the air supply capacity are greatly improved, the wind resistance can be effectively reduced by designing the side wall of the hub 3 to be inclined inwards partially, and the blades 4 connected with the side wall of the hub 3 extend to the inwards inclined part of the hub 3, so that the windward area of the blades 4 is increased; the wind resistance is reduced and the windward area is increased, so that the air supply capacity and the air supply quantity are greatly improved; and the angle of 17-23 degrees is convenient for production and can provide relatively large air supply quantity.
In some embodiments of the invention, the ratio of the lengths of the first side wall 1 and the second side wall 2 in the axial direction of the hub 3 is 0.4-0.5.
The first side wall 1 is an inclined side wall, which brings an effect of increasing air supply, the larger the proportion of the first side wall 1 is, the more obvious the increasing effect is, but if the proportion of the first side wall 1 is too large, the hub 3 is unstable to rotate, the production difficulty is large, so that the proportion of the first side wall 1 is controlled within a reasonable range, and within the range of 0.4-0.5, the larger the effect of increasing the air supply can be brought, the stability of the hub 3 in the rotation process can be ensured, and the production is convenient and quick.
In some embodiments of the present invention, the hub 3 includes a hollow cylinder 14 and a hollow circular truncated cone 15 connected to each other along an axial direction thereof, a side surface of the hollow circular truncated cone 15 forms the first sidewall 1, and a side surface of the hollow cylinder 14 forms the second sidewall 2.
The shape of the hub 3 is a shape symmetrical to the axis, which is more common and more convenient to produce, and is prismatic or cylindrical, the prismatic shape is larger than the cylindrical shape, the air resistance in the rotating process is larger, and the smoothness of the air supply flow is influenced to a certain extent, so that the combination of the cylindrical shape and the truncated cone shape is selected.
In some embodiments of the invention, the first side wall 1 and the second side wall 2 are arranged in sequence in the direction of the air flow.
The first side wall 1 is inclined, so that the first side wall is arranged on the air inlet side, the air inlet quantity can be ensured, and the air inlet quantity is further improved.
In some embodiments of the invention, the blade 4 has a first side 10 and a second side 11 arranged opposite to each other, the first side 10 and the second side 11 being distributed along the direction of the air flow;
The second side 11 sequentially comprises a first section, a second section, a third section and a fourth section along the direction far away from the axis of the hub 3, the connection point of the first section and the hub 3 is a first critical point 5, the connection point of the first section and the second section is a second critical point 6, the connection point of the second section and the third section is a third critical point 7, and the connection point of the third section and the fourth section is a fourth critical point 8;
In the direction away from the axial direction of the hub 3, the first section extends away from the first side edge 10, a plane perpendicular to the axis of the hub 3 is a first plane, and an included angle between a straight line between the first critical point 5 and the second critical point 6 and the first plane is 6-10 degrees.
In the prior art, the improvement of increasing the air supply rate is many, but the air supply rate is generally increased along with the increase of noise, but the curve design of the second side 11 in this embodiment can effectively reduce noise, and the angle between the straight line from the first critical point 5 to the second critical point 6 and the first plane is 6-10 degrees, so that the inclination angle of the straight line between the first critical point 5 and the second critical point is described by using the first plane due to the uncertainty of the placement and the installation angle of the hub, and when the hub is placed positively, i.e. the hub axis is perpendicular to the horizontal plane, the first plane is the horizontal plane at this time, and the description about the inclination angles of some straight lines is also described by using the first plane.
In some embodiments of the invention, the first segment is straight or curved. The two shapes of straight line and arc line are convenient to produce, and the first straight line is preferably designed as an arc line for matching with the whole curve shape of the second side edge 11.
In some embodiments of the invention, the first segment is an arc having a radius of 140-165 mm. Compared with a straight line, the arc shape has larger production difficulty, and the difficulty is gradually increased along with the reduction of the radius of the arc, so that the arc can be matched with the curve of the second side 11, the arc is convenient to produce, better construction effect can be brought, and the arc with the radius of 140-165mm is selected.
In some embodiments of the invention, the first segment is an arc having a radius of 150 mm. When the radius of the arc line is 150mm, all aspects have better performance, especially noise reduction.
In some embodiments of the present invention, in a direction perpendicular to the axis of the hub 3, a length of a straight line between the first critical point 5 and the second critical point 6 is a first length, and a length of a straight line between the first critical point 5 and the fourth critical point 8 is a second length;
the ratio of the first length to the second length ranges from 1:2 to 1:4.
The curve of the second side 11 is formed by bending and turning for a plurality of times, the length and the bending degree of each section have influence on the production difficulty and the noise reduction performance, and when the first length and the second length are in the range of 1:2 to 1:4, the production is more convenient and simple, and the noise reduction effect is good.
In some embodiments of the invention, the ratio of the first length to the second length is 1:3.
When the first length and the second length are 1:3, the production convenience and the noise reduction performance are both best.
In some embodiments of the present invention, the second section and the third section form a curve concave toward the first side 10, and the third critical point 7 is a point closest to the first side 10 in the curve.
The combination of the second section and the third section perfectly matches and completes the curve design of the second side 11, and the third critical point 7 at the connection point of the second section and the third section is the lowest and is the vertex of the curve, thereby facilitating the production of the second section and the third section and having excellent noise reduction performance.
In some embodiments of the invention, the third critical point 7 is in the same first plane as the first critical point 5.
The third critical point 7 is the lowest point of the recess, has the same height as the first critical point 5, is convenient to produce, has regular shape and has better noise reduction effect.
In some embodiments of the present invention, the distance between the first plane in which the second critical point 6 is located and the first plane in which the third critical point 7 is located is 15-23mm.
The height of the second critical point 6 and the height of the third critical point 7 characterize the curvature of the second segment and the depth of the recess, with the best noise reduction effect within the above ranges.
In some embodiments of the invention, the blade 4 has a third side 12 and a fourth side 13 arranged opposite to each other, the first side 10, the third side 12, the second side 11 and the fourth side 13 being connected end to end in sequence; the third side edge 12 is connected with the side wall of the hub 3, and the connection point of the fourth section and the fourth side edge 13 is a fifth critical point 9;
in the direction perpendicular to the axis of the hub 3, the length of the straight line between the second critical point 6 and the fourth critical point 8 is a third length, and the length of the straight line between the first critical point 5 and the fifth critical point 9 is a fourth length;
the ratio of the third length to the fourth length ranges from 2.5:5 to 3.5:5.
The distance between the second critical point 6 and the fourth critical point 8 is the length of the concave curve, the proportion of the horizontal length of the whole first side edge 10 affects the difficulty of production and the noise reduction effect, and the length ratio in the range is selected, so that the effects of the two aspects are better.
In some embodiments of the invention, the ratio of the third length to the fourth length is 3:5.
In the length ratio in the range, when the third length and the fourth length are 3:4, the unique balance point is finally determined through comparison, the production difficulty is low, and the noise reduction effect is very good.
In some embodiments of the present invention, the radius of the circumference where the second critical point 6 is located is 78-85mm.
The second critical point 6 is connected with the first section and the second section, the transition points of the first section and the second section are connected with each other, the radius of the circumference of the transition points enables the transition of the first section and the second section to be relaxed and stable, the smoothness of the whole curve is further affected, the smooth curve can be convenient to produce, the noise reduction effect is also affected, and the radius of 78-85mm is selected to meet the first section and the second section and has good effect.
In some embodiments of the present invention, the radius of the circumference of the third critical point 7 is 78-85mm.
The third critical point 7 is connected with the second section and the third section, the transition points of the second section and the third section are connected, the radius of the circumference of the transition points is used for enabling the transition of the second section and the third section to be relaxed and stable, the smoothness of the whole curve is further affected, the smooth curve can be convenient to produce, the noise reduction effect is also affected, and the radius of 78-85mm is selected to be capable of meeting the transition points of the second section and the third section, and the effect is excellent.
In some embodiments of the present invention, the fourth critical point 8 is a point of the second side 11 that is farthest from the first side 10.
The height of the fourth critical point 8 affects the shape of the fourth segment, and also affects the smoothness of the connection between the first side edge 10 and the fourth side edge 13, so as to affect the production difficulty and the noise reduction effect, and the design is designed to be the highest point, so that the transition between the first side edge 10 and the fourth side edge 13 is smooth, and the double-aspect effect of convenient production and good noise reduction is brought.
In some embodiments of the invention, the fourth segment is an arc having a radius of 8-12 mm.
The shape of the fourth segment influences the transition between the first side edge 10 and the fourth side edge 13, and the transition can be gentle by selecting a radius in the range of 8-12 mm.
In some embodiments of the invention, the fourth segment is an arc having a radius of 10 mm.
Of the radii in the above 8-12mm range, 10mm gives optimum results.
For the angle between the first side wall 1 and the axis of the hub 3 and the length ratio between the first side wall 1 and the second side wall 2 in the axial direction of the hub 3, different parameter designs are respectively selected for testing to determine the optimal parameters or parameter ranges.
Firstly, selecting axial flow fans with different axial angles of the first side wall 1 and the hub 3, respectively installing the axial flow fans in the same axial flow fans, wherein the other parts of the axial flow fans are the same except the axial flow fans, respectively operating the different axial flow fans under the same condition, and testing the wind speed aligned with an air outlet, wherein the results are shown in the following table 1:
Table 1: relation table of included angle between first side wall and hub axis and wind speed
It can be seen from the above table that when the included angle is between 5 ° and 17 °, the wind speed increases rapidly as the included angle increases, that is, the wind volume increases correspondingly, but after 17 °, the wind speed increases as the included angle increases, the wind speed increases obviously slowly, the wind speed wanders between 1640 and 1650, and the survival difficulty increases gradually as the included angle increases, so that 17 ° -23 ° is selected from the above data as the most suitable included angle range, thereby not only meeting the larger wind volume, but also having relatively small production difficulty and being easy to produce.
Then after the range of the included angle is determined, 20 degrees are selected as experimental angles, then axial flow fans with different length ratios of the first side wall 1 and the second side wall 2 in the axial direction of the hub 3 are respectively selected and respectively installed in the same axial flow fans, the rest parts of the axial flow fans are the same except that the length ratios of the first side wall 1 and the second side wall 2 in the axial direction of the hub 3 are different, the different axial flow fans are respectively operated under the same condition, and the wind speeds of the aligned air outlets are tested, so that the following table 2 shows the results:
Table 2: relation table of length ratio of first side wall and second side wall in hub axial direction and wind speed
As can be seen from the table, with the increase of the ratio, the wind speed is increased rapidly, namely the air supply quantity is increased correspondingly, but the situation that the hub 3 rotates unstably and supplies air unstably is found in the test process after the ratio is larger than 0.5, so that the situation is combined, and 0.4-0.5 is selected from the data as the most suitable ratio range, so that the large air supply quantity can be met, and the hub 3 rotates stably and supplies air stably.
The second side 11 is curved, so that noise can be effectively reduced, and as the curve is integrally formed, different sections and critical points are mutually influenced and noise is comprehensively reduced, comprehensive measurement is performed on some data on the second side 11, different data are selected for each parameter respectively, then the parameters of different items are comprehensively tested, and the data of each parameter and the optimal combination data among different parameters are determined through noise measurement. The following optimal selection is determined through statistics and analysis of test results:
(1) The included angle between the straight line between the first critical point 5 and the second critical point 6 and the first plane is 6-10 degrees;
(2) The first section is an arc line with the radius of 140-165mm, and the noise reduction effect is optimal when the radius is 150 mm;
(3) The ratio of the first length to the second length ranges from 1:2 to 1:4, and the noise reduction effect is optimal when the ratio is 1:3;
(4) The distance between the first plane where the second critical point 6 is located and the first plane where the third critical point 7 is located is 15-23mm;
(5) The ratio of the third length to the fourth length ranges from 2.5:5 to 3.5:5, and the noise reduction effect is optimal when the ratio is 3:5;
(6) The radius of the circumference where the second critical point 6 is located is 78-85mm;
(7) The radius of the circumference of the third critical point 7 is 78-85mm;
(8) The fourth section is an arc line with the radius of 8-12mm, and the noise reduction effect is optimal when the radius is 10mm.
The blade 4 is produced by integrating the different parameters, and the optimal data points can be selected by setting the parameters in the data ranges of the parameters. The blade 4 is arranged on the hub 3 to form an axial flow fan blade, and then the axial flow fan blade is arranged in the axial flow fan, and then the noise is tested in the ground operation process, and the noise is reduced to 55dB (A)/20.0 uPa, and the minimum noise is reduced to below 50dB (A)/20.0 uPa.
Based on the same inventive concept, the invention also provides an axial flow fan, which comprises the axial flow fan blade.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (14)
1. An axial flow fan blade comprises a hub (3) and blades (4) connected with the side walls of the hub (3), and is characterized in that the hub (3) is provided with a first side wall (1) and a second side wall (2) which are connected with each other along the axial direction of the hub;
-said first side wall (1) is inclined inwards at an angle of 17 ° -23 ° to the axis of said hub (3) in a direction away from said second side wall (2); -the blades (4) are connected to the first side wall (1) and the second side wall (2) of the hub (3);
The ratio of the lengths of the first side wall (1) and the second side wall (2) in the axial direction of the hub (3) is 0.4-0.5;
The blade (4) has a first side (10) and a second side (11) arranged opposite to each other, the first side (10) and the second side (11) being distributed in the direction of the air flow;
The second side edge (11) sequentially comprises a first section, a second section, a third section and a fourth section along the direction far away from the axis of the hub (3), the connection point of the first section and the hub (3) is a first critical point (5), the connection point of the first section and the second section is a second critical point (6), the connection point of the second section and the third section is a third critical point (7), and the connection point of the third section and the fourth section is a fourth critical point (8);
In the direction away from the axial direction of the hub (3), the first section extends in the direction away from the first side edge (10), a plane perpendicular to the axis of the hub (3) is a first plane, and an included angle between a straight line between the first critical point (5) and the second critical point (6) and the first plane is 6-10 degrees;
the first section is in a straight line or an arc line;
In the direction perpendicular to the axis far from the hub (3), the length of a straight line between the first critical point (5) and the second critical point (6) is a first length, and the length of a straight line between the first critical point (5) and the fourth critical point (8) is a second length;
the ratio of the first length to the second length ranges from 1:2 to 1:4.
2. An axial flow fan blade according to claim 1, characterized in that the hub (3) comprises a hollow cylinder (14) and a hollow circular truncated cone (15) connected to each other along its axial direction, the side of the hollow circular truncated cone (15) forming the first side wall (1), the side of the hollow cylinder (14) forming the second side wall (2).
3. An axial flow fan blade according to claim 1, characterized in that the first side wall (1) and the second side wall (2) are arranged in sequence in the direction of the air flow.
4. The axial flow fan blade according to claim 1, wherein the first section is an arc with a radius of 140-165 mm.
5. The axial flow fan blade of claim 4, wherein the first segment is an arc with a radius of 150 mm.
6. The axial flow fan blade of claim 1, wherein the ratio of the first length to the second length is 1:3.
7. An axial flow fan blade according to claim 1, characterized in that the second and third sections form a curve concave towards the first side (10), the third critical point (7) being the point of the curve closest to the first side (10);
The third critical point (7) is in the same first plane as the first critical point (5).
8. An axial flow fan blade according to claim 7, characterized in that the distance between the first plane in which the second critical point (6) is located and the first plane in which the third critical point (7) is located is 15-23mm.
9. An axial flow fan blade according to claim 7, wherein the blade (4) has a third side (12) and a fourth side (13) arranged opposite to each other, and the first side (10), the third side (12), the second side (11) and the fourth side (13) are connected end to end in sequence; the third side edge (12) is connected with the side wall of the hub (3), and the connection point of the fourth section and the fourth side edge (13) is a fifth critical point (9);
in the direction perpendicular to the axis far from the hub (3), the length of a straight line between the second critical point (6) and the fourth critical point (8) is a third length, and the length of a straight line between the first critical point (5) and the fifth critical point (9) is a fourth length;
the ratio of the third length to the fourth length ranges from 2.5:5 to 3.5:5.
10. The axial flow fan blade of claim 9, wherein the ratio of the third length to the fourth length is 3:5.
11. An axial flow fan blade according to claim 7, characterized in that the radius of the circumference of the second critical point (6) is 78-85mm;
the radius of the circumference where the third critical point (7) is located is 78-85mm.
12. An axial flow fan blade according to claim 7, characterized in that the fourth critical point (8) is the point of the second side (11) furthest from the first side (10); the fourth section is an arc with the radius of 8-12 mm.
13. The axial flow fan blade of claim 12, wherein the fourth segment is an arc with a radius of 10 mm.
14. An axial flow fan comprising the axial flow fan blade according to any one of claims 1 to 13.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012087713A (en) * | 2010-10-21 | 2012-05-10 | Panasonic Corp | Blower impeller and blower with the same |
| CN209687799U (en) * | 2019-02-26 | 2019-11-26 | 珠海格力电器股份有限公司 | Axial flow fan blade and axial flow fan |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2012087713A (en) * | 2010-10-21 | 2012-05-10 | Panasonic Corp | Blower impeller and blower with the same |
| CN209687799U (en) * | 2019-02-26 | 2019-11-26 | 珠海格力电器股份有限公司 | Axial flow fan blade and axial flow fan |
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