CN202056098U - Low-noise computer fan - Google Patents
Low-noise computer fan Download PDFInfo
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- CN202056098U CN202056098U CN2011201718942U CN201120171894U CN202056098U CN 202056098 U CN202056098 U CN 202056098U CN 2011201718942 U CN2011201718942 U CN 2011201718942U CN 201120171894 U CN201120171894 U CN 201120171894U CN 202056098 U CN202056098 U CN 202056098U
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Abstract
The utility model discloses a low-noise computer fan which comprises a rotor and blades arranged on the rotor. The blades are divided into a first layer of blades and a second layer of blades in the axial direction of the rotor; and the first layer of blades and the second layer of blades are alternately arranged. With the adoption of the structure, the air intake quantity is increased, and the air return quantity at an air outlet is reduced, so that the noise of the fan during the work is reduced.
Description
Technical field
The utility model relates to machine element design and manufacturing technology field, and concrete is a kind of low noise computer fan.
Background technique
At present, computer has become the necessary article in people's work and study life, and equipment such as CPU, hard disk, CD-ROM drive generally all are installed in the computer, and each equipment all can give out heat when work; Therefore, radiation fan is installed all in the computer, can in time discharges the heat that computer-internal produces.But the noise that fan produces has to cause people's attention.Powerful computer generally is furnished with powerful fan and discharges heat, the power of fan is big more, and its noise is also big more, the noise that produces when adding other parts work of computer-internal, the computer user is in the noise pollution for a long time, has a strong impact on computer user's physical and mental health.The noise of computer fan generally is owing to the vibration that produces between the backflow of wind regime and the fan blade produces, when the noise of fan big more, its blade vibration just rises big, this vibration can cause the skew of fan spindle bearing and the loss of lubricant oil, make the lost of life of fan, What is more, and this vibration can be conducted to other parts in the computer, cause resonance, cause the lost of life of computer complete machine.Chinese patent " a kind of elastic shock attenuation low noise computer fan " (patent No.: 200620159359.4) according to this vibration, a kind of computer fan has been proposed, utilize inside and outside spring carrier arm that the vibration that fan produces is balanced out, reach the effect that reduces noise, but, this structure can not reduce noise from the source, just plays the effect that a part of noise is fallen in compensation.
In sum, the deficiency of active computer fan existence is:
(1) noise of fan is big, influences computer user's physical and mental health;
(2) working life of fan has been shortened in the vibration that causes of fan noise, and has influence on the working life of computer complete machine.
The model utility content
In order to address the above problem, the utility model provides a kind of low noise computer fan, allows the air quantity that is back to wind regime reduce, and the interference of return air and fan blade is reduced, reduce the vibration of fan blade, not only make the noise of fan reduce but also prolong the life-span of fan and even computer complete machine.
The technological scheme that the utility model is taked is:
A kind of low noise computer fan comprises rotor and is arranged on epitrochanterian blade, it is characterized in that, described blade described rotor axially on be divided into first layer blade and second layer blade, described first layer blade and second layer blade are staggered.
Further, be arranged on close blade tip place between the described first layer blade and the second layer, a round clasp is set at described round clasp.
Further, described blade is for dialling leaf blade or wheel blade blade.
Further, described blade is provided with airfoil structure for dialling the leaf blade on the top of described group of leaf blade.
Further, upper surface and/or lower surface at described blade are provided with circular groove.
The beneficial effect of the utility model low noise computer fan is:
(1) setting of twi-tier blade increases air output, and the backflow air quantity reduces, and has reduced the noise of fan, has reduced pollution;
(2) vibration of fan blade reduces, and has prolonged the working life of fan and computer.
Description of drawings
Accompanying drawing 1 is group leaf blade structure schematic representation of the utility model low noise computer fan;
Accompanying drawing 2 is blade structure schematic representation that round clasp is set;
Accompanying drawing 3 is blade structure schematic representation that airfoil structure is set;
Accompanying drawing 4 is rotating speed noise correlation curve figure;
Accompanying drawing 5 is airflow pressure correlation curve figure.
Label among the figure is respectively:
1. rotor; 2. blade; 21. first layer blade;
22. second layer blade; 3. airfoil structure; 4. round clasp;
5. rotating speed noise curve; 6. rotating speed noise curve; 7. airflow pressure curve;
8. airflow pressure curve.
Embodiment
Elaborate below in conjunction with the embodiment of accompanying drawing to the utility model low noise computer fan.
Referring to accompanying drawing 1, a kind of low noise computer fan comprises rotor 1 and is arranged on epitrochanterian blade 2, blade 2 rotor 1 axially on be divided into first layer blade 21 and second layer blade 22, first layer blade 21 is staggered with second layer blade 22 and arranges.Fan when rotated, air flows to from intake grill, flows out from exhaust outlet, at this moment intake grill just forms vacuum to a certain degree, and exhaust outlet just forms highpressure, and the high-pressure air of exhaust outlet will be back to exhaust outlet, produce vibration with the blade 2 of rotation, thereby produce noise.After blade 2 is divided into two-layer being staggered, be equivalent to original blade 2 has been divided into two covers, first layer blade 21 and second layer blade 22 are brought air into from intake grill respectively, air quantity is increased, reduce the degree of vacuum of intake grill, the return air amount of exhaust outlet just correspondingly reduces, the collision of blade 2 and return air also reduces thereupon, vibration also reduces, and therefore, fan noise also reduces.First layer blade 21 and second layer blade 22 are arranged alternately this structure, feasible more steady from the intake grill leaked-in air, the noise of fan is reduced, this structure, no matter still dial the fan of leaf blade, can both get good noise reduction for the fan of wheel blade blade.So-called wheel blade blade, the shape camber of blade; So-called leaf blade, the shape approximation strip of blade (referring to the blade of accompanying drawing 1) dialled.To dial leaf leaf type fan is example, and during the air quantity flow velocity of conventional fan per minute 2.6 cubic feet (CFM), its per minute rotating speed is 5310(RPM), the noise of generation is 41.5 decibels; And during the air quantity flow velocity of paging fan per minute 2.6 cubic feet (CFM), its per minute rotating speed is 5390(RPM), the noise of generation is 40.4 decibels.Under the identical air quantity condition, the fan noise of layering blade descends obviously.
Referring to accompanying drawing 2,, be easy to when rotating, produce vibration or cause resonance for the long group leaf blade 2 of length of blade.Therefore, people are provided with the rigidity that a round clasp 3 increases blade 2 at blade 2 near the blade tip place usually.After blade 2 is divided into first layer blade 21 and second layer blade 22, equally also near the blade tip place round clasp 3 is set at first layer blade 21 and second layer blade 22, because first layer blade 21 and second layer blade 22 are staggered, a round clasp 3 can be set on first layer blade 21 and second layer blade 22 separately, better method is that round clasp 3 is arranged between first layer blade 21 and the second layer blade 22, both increase blade 2 rigidity, reduced its weight again.This structure not only reduces fan noise, increases the unit air output simultaneously.To dial the leaf blade fan is example, and under the same rotational speed, the fan noise of normal tape round clasp 3 blades is 36.8 decibels, and the noise of the layering blade fan of band round clasp 3 is 34.8 decibels; Under the same noise, the fan per minute air quantity of normal tape round clasp 3 is 4.89 cubic feet, and the per minute air quantity of the layering blade fan of band round clasp 3 is 5.00 cubic feet, and effect is obvious.
On this basis, the upper surface of blade 2 is provided with the circular groove (not shown), and when exhaust outlet had return air, return air can enter from circular groove, can balance the degree of vacuum of intake grill, reduce the vibration that return air causes the impact of blade 2.Lower surface or upper and lower surface that circular groove also can be arranged on blade 2 according to the shape of blade 2 are provided with simultaneously.
Referring to accompanying drawing 3, on the top of dialling the leaf blade wing-shaped structure 4 is set, airfoil structure 4 is made up of the little tadpole shape structure broad in the middle in two, airfoil structure 4 can make air output smooth transition in blade 2, a part of air quantity of air output is used for the degree of vacuum of balance intake grill, make the return air amount of exhaust outlet reduce, the vibration of blade 2 is reduced.The end that is arranged so that blade 2 of airfoil structure 4 is bigger than root, and like this, the vibration of blade 2 reduces, and therefore, the noise of fan reduces.
Referring to accompanying drawing 4, accompanying drawing 4 is rotating speed noise correlation curve figure, and transverse coordinate axis is represented the per minute rotating speed (RPM) of fan, and the along slope coordinate axle is the noise decibel value, and rotating speed noise curve 5 is generally to dial the rotating speed noise curve that the leaf blade divides two-layer fan; Rotating speed noise curve 6 is the rotating speed noise curves that the leaf blade divides two-layer fan of dialling of band airfoil structure 4, from these two curves as can be seen, uses the noise of fan of the blade 2 with airfoil structure 4 obviously low.
Referring to accompanying drawing 5, accompanying drawing 5 is airflow pressure correlation curve figure, and transverse coordinate axis is represented the air quantity of fan, and unit is cubic foot per minute (CFM), and the along slope coordinate axle is a blast, and unit is column (mmH
2O), airflow pressure curve 7 is generally to dial the airflow pressure curve that the leaf blade divides two-layer fan; Airflow pressure curve 8 is the airflow pressure curves that the leaf blade divides two-layer fan of dialling of band airfoil structure 4; From these two curves as can be seen, use the blast of fan of blade 2 obviously high with airfoil structure 4.
The above only is a preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (5)
1. a low noise computer fan comprises rotor and is arranged on epitrochanterian blade, it is characterized in that: described blade described rotor axially on be divided into first layer blade and second layer blade, described first layer blade and second layer blade are staggered.
2. low noise computer fan according to claim 1 is characterized in that: near top end, a round clasp is set between described first layer blade and second layer blade.
3. low noise computer fan according to claim 1 and 2 is characterized in that: described blade is for dialling leaf blade or wheel blade blade.
4. low noise computer fan according to claim 1 and 2 is characterized in that: described blade is provided with airfoil structure for dialling the leaf blade on the top of described blade.
5. low noise computer fan according to claim 1 and 2 is characterized in that: upper surface and/or lower surface at described blade are provided with circular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201718942U CN202056098U (en) | 2011-05-26 | 2011-05-26 | Low-noise computer fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201718942U CN202056098U (en) | 2011-05-26 | 2011-05-26 | Low-noise computer fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202056098U true CN202056098U (en) | 2011-11-30 |
Family
ID=45016069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201718942U Expired - Fee Related CN202056098U (en) | 2011-05-26 | 2011-05-26 | Low-noise computer fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202056098U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019148468A1 (en) * | 2018-02-02 | 2019-08-08 | 华为技术有限公司 | Fan and mobile terminal |
-
2011
- 2011-05-26 CN CN2011201718942U patent/CN202056098U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019148468A1 (en) * | 2018-02-02 | 2019-08-08 | 华为技术有限公司 | Fan and mobile terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111130 Termination date: 20140526 |