CN114962325B - High-efficiency fan blade and centrifugal fan - Google Patents
High-efficiency fan blade and centrifugal fan Download PDFInfo
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- CN114962325B CN114962325B CN202210697180.8A CN202210697180A CN114962325B CN 114962325 B CN114962325 B CN 114962325B CN 202210697180 A CN202210697180 A CN 202210697180A CN 114962325 B CN114962325 B CN 114962325B
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 5
- 229920000106 Liquid crystal polymer Polymers 0.000 claims description 8
- 239000004977 Liquid-crystal polymers (LCPs) Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 230000007704 transition Effects 0.000 claims description 6
- 238000001746 injection moulding Methods 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims description 4
- 230000003068 static effect Effects 0.000 abstract description 5
- 239000004033 plastic Substances 0.000 description 4
- 238000005498 polishing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 241000883990 Flabellum Species 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000003913 materials processing Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- 229920005989 resin Polymers 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Classifications
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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
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/02—Selection of particular materials
- F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a high-efficiency fan blade, which comprises a hub and a plurality of blades, wherein the blades extend outwards along the peripheral side of the outer edge of the hub along the radial direction to form the blade, the blades comprise a straight plate section, a first arc section and a second arc section, the second arc section is connected to the hub, the first arc section is positioned between the second arc section and the straight plate section, and the second arc section is connected with the straight plate section; the blade is formed with a fixed end and a free end, and the straight plate section is positioned at the free end. When the first arc-shaped section and the second arc-shaped section are connected with each other to form the high-efficiency blade, the rotating speed, the output air quantity and the static pressure of the blade can be further improved when the blade is operated.
Description
Technical Field
The invention relates to a high-efficiency fan blade.
Background
Along with development of technology, computers are updated faster and faster, and heat generated by heat sources of the computers is also increased, so that requirements on cooling fans inside the computers are also increased.
The existing heat dissipation device generally uses a centrifugal fan, and the existing centrifugal fan blade generally uses metal or plastic to manufacture the fan blade, however, the metal fan blade has heavy weight, the plastic fan blade has light weight, and the fan blade is conventionally formed by using straight plate blades or arc blades, so that the noise of the centrifugal fan is difficult to further reduce, the output air quantity is further improved, and the like, and the air-driving efficiency of the fan is difficult to improve.
Disclosure of Invention
The invention aims to provide a novel high-efficiency fan blade, and aims to solve the problem that the air quantity and static pressure of the conventional centrifugal fan are insufficient.
The technical scheme for solving the technical problems is as follows:
The utility model provides a high-efficiency flabellum, includes wheel hub and a plurality of blade, a plurality of blade is outwards extended along radial direction by wheel hub outer fringe week side and is formed, the blade includes straight board section, first arc section and second arc section, the second arc section is connected on the wheel hub, first arc section is located between second arc section and the straight board section, connects second arc section and straight board section; the blade is formed with a fixed end and a free end, and the straight plate section is positioned at the free end.
Further, the straight plate section and the center of the hub are on the same straight line.
Further, a fixed end of the second arc section is formed with an included angle alpha, and a straight line passing through the fixed end of the second arc section and the center of the hub is defined as B, wherein the included angle alpha is not smaller than 40 degrees and not larger than 60 degrees.
Further, the bending direction of the first arc-shaped section is opposite to that of the second arc-shaped section, and the first arc-shaped section is directly connected with the second arc-shaped section and is in smooth transition at the connecting position.
Further, the bending directions of the first arc-shaped section and the second arc-shaped section are opposite, and the first arc-shaped section and the second arc-shaped section are smoothly transited by the transition section.
Further, the straight line distance from the center of the hub to the free end of the blade is a radius r, and the length of the straight plate section along the radial direction of the hub is l 1, so that 0.08 x r is less than or equal to l1 and less than or equal to 0.11 x r is satisfied.
Further, the arc length of the second arc-shaped section is l 3, and the arc length of the first arc-shaped section is l 2, which satisfies 0.3×l 3≦l2≦0.6*l3.
Further, the thicknesses of the first arc-shaped section, the second arc-shaped section and the straight plate section are the same.
Further, the device also comprises a mute ring, wherein the mute ring integrally connects a plurality of straight plate sections.
Further, along the radial direction of the hub, the two ends of the straight plate section are protruded with mute rings.
Further, the number of the blades is not less than 60 and not more than 100.
Further, the first arc section is an arc section, an end point is formed at one end of the first arc section, which is connected with the straight plate section, and a tangent line of the first arc section at the end point coincides with the straight plate section.
Further, the second arc section is an arc section, a first tangent line is formed at the end point of the connection between the first arc section and the second arc section, a second tangent line is formed at the end point of the connection between the second arc section and the first arc section, and the first tangent line and the second tangent line are overlapped.
Further, the radius range of the second arc-shaped section is 15mm to 30mm, and the radius range of the first arc-shaped section is 5mm to 10mm.
Further, the maximum thickness of each of the blades is not more than 0.5mm.
Further, the curvature of the second arcuate segment is less than the curvature of the first arcuate segment.
Further, the blade is formed by injection molding of a liquid crystal polymer material.
The invention also provides a centrifugal fan which comprises a base and a cover plate, wherein the high-efficiency fan blade is arranged on the base, and the cover plate is positioned above the high-efficiency fan blade.
The invention has the beneficial effects that: the reasonable design layout of the multi-section arc section and the straight plate section blade are combined, so that the overall efficiency of the fan is improved.
Drawings
The invention will be further described with reference to the following drawings and examples.
FIG. 1 is a schematic perspective view of a fan blade according to the present invention.
FIG. 2 is a schematic top view of a fan blade according to the present invention.
FIG. 3 is a schematic view of a blade of the fan blade of the present invention.
Fig. 4 is an enlarged schematic view of C in fig. 2.
Fig. 5 is a schematic view of a blade according to another embodiment of the present invention.
Fig. 6 is a schematic view of a prior art cambered vane.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1 to 4, a first embodiment of a high performance fan blade according to the present application is shown. The high performance fan blade comprises a hub 10 and a plurality of blades (not numbered in the drawing), wherein the hub 10 can be a metal hub 10 or a plastic hub 10 or a combination of the two, and in the application, the blades are plastic blades.
The hub 10 has an outer peripheral side, and the blades are formed by extending outwards along the outer peripheral side of the hub 10 along the radial direction, and the blades comprise a straight plate section 21, a first arc-shaped section 22 and a second arc-shaped section 23. The blade defines a fixed end 11 and a free end 12. The fixed end 11 is fixedly connected to the peripheral side of the outer edge of the hub 10, the straight plate section 21 forms a free end 12 of the blade, and the first arc-shaped section 22 is located between the second arc-shaped section 23 and the straight plate section 21 and connects the second arc-shaped section 23 and the straight plate section 21.
Specifically, the straight plate section 21 and the center of the hub 10 are on the same straight line, the straight line distance from the center of the hub 10 to the free end 12 of the blade is a radius r, the length of the straight plate section 21 along the radial direction of the hub 10 is l 1, and 0.08×r is equal to or less than l 1 is equal to or less than 0.11×r, which is used for improving the efficiency of the fan blade, in this embodiment, l 1 is preferably 1.15mm, and the radius r is preferably 13mm.
In the first embodiment, a tangent line at the fixed end 11 of the second arc-shaped section 23 is defined as a, a straight line passing through the fixed end 11 of the second arc-shaped section 23 and the center of the hub 10 is defined as B, an included angle a is formed between a and B, the included angle a is between 40 degrees and 60 degrees, and the curvature of the second arc-shaped section 23 is smaller than that of the first arc-shaped section 22.
Specifically, the bending directions of the second arc-shaped section 23 and the first arc-shaped section 22 are opposite, and the first arc-shaped section 22 is directly connected with the second arc-shaped section 23 and smoothly transits at the connection position. The arc length of the second arc-shaped section 23 is l 3, the arc length of the first arc-shaped section 22 is l 2, and the requirement of 0.3 x l 3≦l2≦0.6*l3 is satisfied, so that the efficiency of the fan blade is improved. In the present application, the first arc-shaped section 22 is a circular arc-shaped section, the connecting end of the first arc-shaped section 22 and the straight plate section 21 forms a terminal point 221, and the tangent line of the first arc-shaped section 22 at the terminal point 221 coincides with the straight plate section 21. The second arc-shaped section 23 is also an arc-shaped section, a first tangent line is formed at the connecting end point of the first arc-shaped section 22 and the second arc-shaped section 23, a second tangent line is formed at the connecting end point of the second arc-shaped section 23 and the first arc-shaped section 22, and the first tangent line and the second tangent line are mutually overlapped. Specifically, the radius of the second arc-shaped section 23 ranges from 15mm to 30mm, the radius of the first arc-shaped section 22 ranges from 5mm to 10mm, and in the present embodiment, the radius of the second arc-shaped section is preferably 18mm, and the radius of the first arc-shaped section is preferably 7.5mm.
Specifically, the maximum thickness of each blade is not more than 0.5mm. The straight plate section 21 has a thickness t, wherein the thickness t is preferably 0.15mm, and the thicknesses of the first arc section 22 and the second arc section 23 are the same as the thickness t of the straight plate section 21, so that the efficiency of the fan blade is improved, the fan blade has a stable integral structure, is not easy to locally break when the fan blade is demolded after injection molding, and the product yield is improved.
Specifically, in this embodiment, the high-efficiency fan blade further includes a mute ring 30, the mute ring 30 integrally connects the plurality of straight plate segments 21, and two ends of the straight plate segments 21 protrude from the mute ring 30 along the radial direction of the hub 10, so as to achieve the effect of noise reduction, and improve the efficiency of the fan blade.
In the present application, preferably, the number of blades of the high-efficiency fan blade is not less than 60 and not more than 100. In the present embodiment, the number of the blades is 80.
As shown in fig. 5, another embodiment of the blade of the present application is different from the first embodiment in that: the smooth transition between the first arc-shaped section 22 and the second arc-shaped section 23 by the transition section 24 can also achieve the similar effect to the first embodiment.
The performance of the high performance fan blade of the present application is compared with that of the old fan blade, which is composed of an arc-shaped blade (as shown in fig. 6), by experimental data simulation.
Specifically, the efficiency experiment of the conventional arc blade designed in the prior art is compared with that of the centrifugal fan blade in the application, as shown in the following table,
| Noise dB (A) | Rotational speed RPM | Air volume CFM | Static pressure mmH2O | |
| Old fan blade | 38 | 3200 | 7.18 | 10.49 |
| The application relates to a high-efficiency fan blade | 38 | 3300 | 7.92 | 11.77 |
As can be seen from the table, compared with the old fan blade, the high-efficiency fan blade has the advantages that the rotating speed is improved by 0.03%, the air quantity is improved by 10.3%, and the static pressure is improved by 12.2%. This demonstrates that the high efficiency fan blade of the present application can improve the disadvantages of insufficient air volume and static pressure of the arc-shaped blades compared with the prior art.
In this embodiment, the blade and the mute ring are formed by injection molding of a liquid crystal polymer material, and carbon fiber materials can be mixed into the liquid crystal polymer material, so that the structural strength of the centrifugal fan blade is increased. The liquid crystal polymer material is a generic term for thermoplastic aromatic polyesters which exhibit liquid crystallinity when in a molten state. The liquid crystal polymer has a molecular structure which is not easy to bend, and is characterized in that the degree of the entanglement of molecules peculiar to the general polymer substance on the liquid crystal polymer is very light, and the entanglement of the molecular chains is very small unlike the general polymer. The molecular orientation can be caused by small shearing force, so that the flow resistance in injection molding is very small, and the molding fluidity is excellent. And because the molecules maintain the same molecular structure phase as the molecules in a molten state during solidification, the volume change of the molecular rearrangement is small, and high dimensional accuracy can be obtained; according to the characteristics, the liquid crystal polymer material is suitable for manufacturing the thin centrifugal fan blade.
The fluid polishing technology can carry out detail grinding treatment according to various different technical requirements, can also achieve mirror polishing according to different materials and pre-processing treatment, or solves the problem of difficult adhesion of surface treatment. The principle is that soft resin is added with high-fluidity liquid glue and then grinding particles are added according to grinding or polishing requirements. The special soft flowing abrasive is made, has the characteristics of fluidity and coating high-content abrasive powder, passes through the surface of a workpiece in an up-and-down motion mode, and can polish the surface of a die by using special diamond particles and special polishing powder and achieve the effect of a mirror surface.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment contains only one independent technical solution, and that such description is provided for clarity only, and that the technical solutions of the embodiments may be appropriately combined to form other embodiments that will be understood by those skilled in the art.
Claims (17)
1. A high-efficiency fan blade for a centrifugal fan, said fan blade comprising a hub (10) and a plurality of blades, characterized in that,
The plurality of blades are formed by extending the peripheral side of the outer edge of the hub (10) outwards along the radial direction, each blade comprises a straight plate section (21), a first arc section (22) and a second arc section (23), the second arc section (23) is connected to the hub (10), the first arc section (22) is positioned between the second arc section (23) and the straight plate section (21), and the second arc section (23) is connected with the straight plate section (21);
the blade is provided with a fixed end (11) and a free end (12), and the straight plate section (21) is positioned at the free end (12);
The thicknesses of the first arc-shaped section and the second arc-shaped section are the same as the thickness of the straight plate section;
the bending direction of the first arc-shaped section (22) is opposite to that of the second arc-shaped section (23);
-the curvature of the second arc-shaped section (23) is smaller than the curvature of the first arc-shaped section (22);
the arc length of the second arc-shaped section (23) is l 3, the arc length of the first arc-shaped section (22) is l 2, and l 3 is larger than l 2.
2. The high-efficiency fan blade according to claim 1, wherein the center of the straight plate section (21) and the center of the hub (10) are on the same straight line.
3. The high-efficiency fan blade according to claim 2, wherein a tangent line a is formed at the fixed end (11) of the second arc segment (23), a straight line passing through the fixed end (11) of the second arc segment (23) and the center of the hub (10) is defined as B, and an included angle a is formed between a and B, and the included angle a is not less than 40 degrees and not more than 60 degrees.
4. A high efficiency fan blade according to claim 3, wherein the first arcuate section (22) and the second arcuate section (23) are curved in opposite directions, and the first arcuate section (22) and the second arcuate section (23) are directly connected and smoothly transition at the connection.
5. A high efficiency fan blade according to claim 3, wherein the first arcuate section (22) and the second arcuate section (23) are smoothly transitioned by a transition section (24).
6. The high efficiency fan blade according to claim 4 or 5, wherein the straight distance from the center of the hub (10) to the free end (12) of the blade is a radius r, and the length of the straight plate section (21) along the radial direction of the hub (10) is l 1, which satisfies 0.08 x r+.ltoreq.l 1 +.0.11 x r.
7. The high performance fan blade according to any of claims 1 to 5, wherein 0.3 x 3≦l2≦0.6*l3 is satisfied.
8. The high-efficiency fan blade according to claim 7, wherein the first arc-shaped section (22), the second arc-shaped section (23) and the straight plate section (21) have the same thickness.
9. The high efficiency fan blade of any one of claims 1 to 5, further comprising a mute ring (30), the mute ring (30) integrally connecting a plurality of the straight plate segments (21).
10. The high efficiency fan blade of claim 9, wherein: along the radial direction of the hub (10), the two ends of the straight plate section (21) are protruded with mute rings (30).
11. The high performance fan blade according to any of claims 1 to 5, wherein: the number of the blades is not less than 60 and not more than 100.
12. The high efficiency fan blade according to any one of claims 1 to 5, wherein the first arcuate segment (22) is an arcuate segment, an end point (221) is formed at the connection end of the first arcuate segment (22) and the straight segment (21), and a tangent line of the first arcuate segment (22) at the end point (221) coincides with the straight segment (21).
13. The high performance fan blade according to any of claims 1 to 5, wherein: the second arc-shaped section (23) is an arc-shaped section, a first tangent line is formed at the end point of the first arc-shaped section (22) connected with the second arc-shaped section (23), a second tangent line is formed at the end point of the second arc-shaped section (23) connected with the first arc-shaped section (22), and the first tangent line and the second tangent line are overlapped.
14. The high efficiency fan blade of claim 13, wherein: the radius of the second arc-shaped section (23) ranges from 15mm to 30mm, and the radius of the first arc-shaped section (22) ranges from 5mm to 10mm.
15. The high efficiency fan blade of claim 1, wherein: the maximum thickness of each blade is not greater than 0.5mm.
16. The high efficiency fan blade of claim 1, wherein: the blade is formed by injection molding of a liquid crystal polymer material.
17. A centrifugal fan comprising a high efficiency fan blade according to any one of claims 1 to 16, wherein: and also comprises
The high-efficiency fan blade is arranged on the base;
and the cover plate is positioned above the high-efficiency fan blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210697180.8A CN114962325B (en) | 2022-06-20 | 2022-06-20 | High-efficiency fan blade and centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210697180.8A CN114962325B (en) | 2022-06-20 | 2022-06-20 | High-efficiency fan blade and centrifugal fan |
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| Publication Number | Publication Date |
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| CN114962325A CN114962325A (en) | 2022-08-30 |
| CN114962325B true CN114962325B (en) | 2024-08-06 |
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| CN117514902A (en) * | 2023-10-20 | 2024-02-06 | 华为技术有限公司 | Impeller, centrifugal fan and electronic device |
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| EP1669610A1 (en) * | 2004-12-13 | 2006-06-14 | Faz Elektrik Motor Makina Sanayi ve Ticaret A.S. | Axial fan |
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| CN103062112B (en) * | 2013-01-10 | 2016-07-20 | 中联重科股份有限公司 | Road cleaning equipment and centrifugal fan impeller thereof |
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| US10989218B2 (en) * | 2018-05-29 | 2021-04-27 | Asia Vital Components Co., Ltd. | Fan wheel structure |
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| KR102467279B1 (en) * | 2020-12-02 | 2022-11-16 | 엘지전자 주식회사 | Centrifugal fan |
| CN213953989U (en) * | 2020-12-18 | 2021-08-13 | 泛仕达机电股份有限公司 | Axial flow wind wheel and fan applying same |
| CN214465094U (en) * | 2020-12-24 | 2021-10-22 | 无锡绿岛风环保工程有限公司 | High-pressure ventilator impeller that spinning machine used |
| CN214499477U (en) * | 2020-12-29 | 2021-10-26 | 太仓欣华盈电子有限公司 | Mute fan, heat dissipation device and electronic product |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1669610A1 (en) * | 2004-12-13 | 2006-06-14 | Faz Elektrik Motor Makina Sanayi ve Ticaret A.S. | Axial fan |
| CN202165308U (en) * | 2011-07-08 | 2012-03-14 | 重庆神驰机电有限公司 | Fan of generator |
| CN111946665A (en) * | 2020-08-20 | 2020-11-17 | 奇鋐科技股份有限公司 | Centrifugal fan blade structure |
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| CN114962325A (en) | 2022-08-30 |
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