CN203067351U - Fan blade device of heat-radiating fan with noise reduction effect - Google Patents
Fan blade device of heat-radiating fan with noise reduction effect Download PDFInfo
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- CN203067351U CN203067351U CN 201320029622 CN201320029622U CN203067351U CN 203067351 U CN203067351 U CN 203067351U CN 201320029622 CN201320029622 CN 201320029622 CN 201320029622 U CN201320029622 U CN 201320029622U CN 203067351 U CN203067351 U CN 203067351U
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- wheel hub
- air
- blade
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- radiation fan
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Abstract
The utility model discloses a fan blade device of a heat-radiating fan with a noise reduction effect. An air inlet side for air stream to inflow and an air outlet side opposite to the air inlet side and used for the air stream to outflow are defined; the fan blade device comprises a wheel hub and a plurality of blades arranged on the wheel hub at an interval in a surrounding way; each blade is provided with a windward surface facing to the air inlet side, a leeward surface facing to the air outlet side, a bump formed at one end of the windward surface far away from the wheel hub, a plurality of recesses formed on the windward surface at an interval and positioned between the wheel hub and the bump, and a plurality of bosses formed on the leeward surface at an interval and corresponding to the recesses in position respectively. Due to the design of the bump and the recesses on each blade, the air flow disturbance phenomenon can be effectively reduced, and the noise generated when the heat-radiating fan runs is reduced.
Description
Technical field
The utility model relates to a kind of flabellum device, particularly relates to a kind of flabellum device with the radiation fan that reduces noise result.
Background technique
The application area field of radiation fan is extensive, and industrial products, electronic instrument can be seen the extension of radiation fan and use such as.
Consult Fig. 1, existing radiation fan 1 comprises shell block 11, a wheel hub 12 that is hollow shape, and a flabellum group 13.This wheel hub 12 is to be hubbed in this shell block 11 and can be around himself axis rotation, and this flabellum group 13 has the blade 131 on several outer circumferential faces that are arranged at this wheel hub 12 at intervals.
When existing radiation fan 1 turns round, 11 of the outer rim of the described blade that runs up 131 and this shell blocks are easy to generate bigger noise (wind is cut sound) because of air disturbance, if people are under the environment of the noise of having powerful connections for a long time, make the people feel fidgety easily and the shortage quality of life, particularly long-term in the face of being full of the environment of noise, easier in psychology and physiology generation harmful effect.
Consult Fig. 2, in order to address the above problem, just announcing the technology that M395067 patent case " radiation fan rotor pedestal structure-improved " is disclosed just like TaiWan, China, is by changing structure and the shape of the thin footpath supporting bar 21 on this Base body 2, reduces airflow strikes and the noise that produces.Yet the noise that the radiation fan running time produces mainly still comes from air-flow and directly clashes into flabellum surface institute and cause.Therefore, only change structure and the shape of described thin footpath supporting bar 21, still limited to the improvement of noise.
Summary of the invention
The purpose of this utility model is to provide a kind of flabellum device with the radiation fan that reduces noise result that can reduce noise.
The utlity model has the flabellum device of the radiation fan that reduces noise result, the inlet air side that definition has an air feed stream to flow into, reach one in contrast to this inlet air side and the air side that air feed stream flows out, this flabellum device comprises a wheel hub, and several pieces spacer ring windings place the blade on this wheel hub.Each sheet blade have a windward side towards this inlet air side, lee face towards this air side, one be formed at this windward side away from the ridge on one of this wheel hub end, several are formed on this windward side and the depressed part between this wheel hub and this ridge at interval, and several are formed on this lee face at interval and distinguish the bump of the position of corresponding described depressed part.
The purpose of this utility model and solve its technical problem and also can be applied to the following technical measures to achieve further.
Preferably, aforementioned flabellum device with the radiation fan that reduces noise result, wherein each sheet blade also has one towards the first side of this inlet air side, and the second side towards this air side, described depressed part is to arrange at interval along this first side also to extend toward the direction of this second side.
The beneficial effects of the utility model are: the ridge on each blade and the design of depressed part, can effectively reduce the flow-disturbing phenomenon of air-flow, and then the noise that produces when reducing the radiation fan running.
Description of drawings
Fig. 1 is a plan view, and existing radiation fan is described;
Fig. 2 is a three-dimensional exploded view, announces M395067 patent case by TaiWan, China and is disclosed it " radiation fan rotor pedestal structure-improved ";
Fig. 3 is a stereogram, and a preferred embodiment of the flabellum device that the utlity model has the radiation fan that reduces noise result is described;
Fig. 4 is a side view, aid illustration Fig. 3;
Fig. 5 is a worm's eye view, aid illustration Fig. 3; And
Fig. 6 is a partial perspective view, aid illustration Fig. 3.
Embodiment
Below in conjunction with drawings and Examples the utility model is elaborated.
Consult Fig. 3 to 5, preferred embodiment for the flabellum device 3 that the utlity model has the radiation fan that reduces noise result, the inlet air side A that these flabellum device 3 definition have air feed stream to flow into, reach one in contrast to this inlet air side A and the air side B that air feed stream flows out, this flabellum device 3 comprises a wheel hub 31, and several spacer ring windings place the blade 32 on this wheel hub 31.
Each blade 32 has a windward side 321 towards this inlet air side A, one lee face 322 towards this air side B, one first side 323 towards this inlet air side A, one second side 324 towards this air side B, one is formed at this windward side 321 away from the ridge 325 on the end of this wheel hub 31, several are formed on this windward side 321 at interval and are positioned at this wheel hub 31 and the depressed part 326 of 325 of this ridges, and several are formed on this lee face 322 and the bump 327 of the position of corresponding described depressed part 326 respectively at interval, and described depressed part 326 is to arrange at interval along this first side 323 and extend toward the direction of this second side 324.
Boundary layer separation is a kind of phenomenon of fluid, refers to originally be close to the boundary layer disengaging body surface that body surface flows.In aerodynamics, boundary layer separation can make resistance rise, and therefore many fluid dynamic researchs all inquiring into how to design object surfaces and profile, to slow down the separation in boundary layer, make the boundary layer maintain object surfaces as much as possible.
Consult Fig. 3,6, the utility model mainly is to allow this flabellum device 3 imitate the design of whale tail fins, on the windward side 321 of each blade 32, be formed with depressed part 326, and the design of described depressed part 326, can be so that the height of the described depressed part 326 back bounce-backs of airflow strikes, height less than bounce-back behind the windward side 321 of the described blade 32 of airflow strikes, slow down the phenomenon of boundary layer separation, near each blade 32, produce eddy current and can reduce air-flow, and then the noise (wind is cut sound) of reduction radiation fan running generation, reach quiet effect, simultaneously also can avoid eddy current to cause described blade 32 stall and influence the performance of radiation fan.In addition, the design of the ridge 325 of each blade 32 helps to prevent the leakage of air-flow, and the wind that produces in the time of reducing these flabellum device 3 rotations is equally cut sound, further promotes quiet effect.
As shown in Table 1, be the experimental result of actual measurement noise level, experimental group is to use the radiation fan of flabellum device 3 of the present utility model, and the radiation fan of control group then is not to be formed with depressed part 326 and ridge 325 on the blade 32.By the experimental result of table one as can be known, the average noise value of control group is 27.4 decibels, and (decibel, dB), and the average noise value of experimental group is 25.5 decibels.Hence one can see that, is formed with the noise that produces when depressed part 326 can reduce these flabellum device 3 rotations really with ridge 325 on blade 32.
In sum, the utlity model has the flabellum device 3 of the radiation fan that reduces noise result, ridge 325 on each blade 32 and the design of depressed part 326 can effectively reduce the flow-disturbing phenomenon of air-flow, and then the noise that produces when reducing the radiation fan running.
Table one
Claims (2)
1. flabellum device with the radiation fan that reduces noise result, the inlet air side that definition has an air feed stream to flow into, reach one in contrast to this inlet air side and the air side that air feed stream flows out, this flabellum device comprises a wheel hub, and several pieces spacer ring windings place the blade on this wheel hub, each sheet blade has one towards the windward side of this inlet air side, lee face towards this air side, it is characterized in that: each sheet blade also has one and is formed at this windward side away from the ridge on the end of this wheel hub, several be formed on this windward side at interval and be positioned at this wheel hub and this ridge between depressed part, and several are formed on this lee face and the bump of the position of corresponding described depressed part respectively at interval.
2. according to the described flabellum device with the radiation fan that reduces noise result of claim 1, it is characterized in that: each sheet blade also has one towards the first side of this inlet air side, and the second side towards this air side, described depressed part is to arrange at interval along this first side also to extend toward the direction of this second side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320029622 CN203067351U (en) | 2013-01-21 | 2013-01-21 | Fan blade device of heat-radiating fan with noise reduction effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320029622 CN203067351U (en) | 2013-01-21 | 2013-01-21 | Fan blade device of heat-radiating fan with noise reduction effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203067351U true CN203067351U (en) | 2013-07-17 |
Family
ID=48766141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320029622 Expired - Lifetime CN203067351U (en) | 2013-01-21 | 2013-01-21 | Fan blade device of heat-radiating fan with noise reduction effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203067351U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889128A (en) * | 2016-05-25 | 2016-08-24 | 珠海格力电器股份有限公司 | Centrifugal fan blade, outer rotor fan and air conditioner |
| CN109531448A (en) * | 2019-01-14 | 2019-03-29 | 禹州七方超硬材料制品有限公司 | A kind of steel matrix extra hard material grinding wheel |
| TWI658214B (en) * | 2017-08-25 | 2019-05-01 | 宏碁股份有限公司 | Heat dissipation blade and heat dissipation fan |
-
2013
- 2013-01-21 CN CN 201320029622 patent/CN203067351U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889128A (en) * | 2016-05-25 | 2016-08-24 | 珠海格力电器股份有限公司 | Centrifugal fan blade, outer rotor fan and air conditioner |
| TWI658214B (en) * | 2017-08-25 | 2019-05-01 | 宏碁股份有限公司 | Heat dissipation blade and heat dissipation fan |
| US10914313B2 (en) | 2017-08-25 | 2021-02-09 | Acer Incorporated | Heat dissipation blade and heat dissipation fan |
| CN109531448A (en) * | 2019-01-14 | 2019-03-29 | 禹州七方超硬材料制品有限公司 | A kind of steel matrix extra hard material grinding wheel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130717 |
|
| CX01 | Expiry of patent term |