CN109210015A - A kind of method of blower noise reduction - Google Patents
A kind of method of blower noise reduction Download PDFInfo
- Publication number
- CN109210015A CN109210015A CN201811098714.5A CN201811098714A CN109210015A CN 109210015 A CN109210015 A CN 109210015A CN 201811098714 A CN201811098714 A CN 201811098714A CN 109210015 A CN109210015 A CN 109210015A
- Authority
- CN
- China
- Prior art keywords
- tongue
- slot
- noise reduction
- noise
- blower
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000010363 phase shift Effects 0.000 claims abstract description 6
- 239000012071 phase Substances 0.000 claims description 15
- 239000008385 outer phase Substances 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 210000002105 tongue Anatomy 0.000 description 37
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- 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
- F04D29/663—Sound attenuation
- F04D29/665—Sound attenuation by means of resonance chambers or interference
-
- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/422—Discharge tongues
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a kind of method of blower noise reduction, including body, internal body surrounds the rounded distribution of fan blade；Internal body is provided with air outlet, air outlet is located at the side of body, the outside of connection body；Tongue is provided at air outlet, tongue connects body and air outlet, and when rotated, the kinetic energy for driving air-flow to generate generates noise in tongue to fan blade；Tongue is provided with denoising structure, denoising structure is located on tongue, and the kinetic energy that air-flow generates is changed, and reaches the phase shift of audio, phase difference is formed, to reduce the noise of blower.A kind of method of blower noise reduction provided by the invention, using in tongue, denoising structure is set, change kinetic energy of the air-flow when passing through tongue, to influence the phase shift of noise, it is cancelled out each other, so that noise decibel is reduced, under the premise of guaranteeing blower sizes and installation space, noise is reduced, is effectively improved using comfort.
Description
Technical field
The present invention relates to the methods of blower noise reduction, more particularly to noise reduction used in the small-sized fan applied in electronic product
Method.
Background technique
Currently, can all be cooled down using blower in electronic product, in the positions such as CPU and video card, the effect of blower is especially
Obviously, and noise that blower is generated when running at high speed also results in the puzzlement using client, noise effect people at all times
Normal use and usage comfort, while in electronic product space limitation, blower noise reduction is resulted in
Difficulty can not complete noise reduction, therefore always electronic product urgent problem to be solved using traditional sound-silencing measures.
Summary of the invention
The present invention is intended to provide a kind of method of blower noise reduction, using the variation of tongue geometric dimension, for the spy of blower
Frequency noise is levied, the kinetic energy of air-flow is transformed into the kinetic energy of different pressures, to form the effect for reducing noise.
To solve the above problems, a kind of method of blower noise reduction provided by the invention adopts the technical scheme that
A kind of method of blower noise reduction, including body, the internal body surround the rounded distribution of fan blade；Institute
The internal body stated is provided with air outlet, and the air outlet is located at the side of the body, body described in connection it is outer
Side；Tongue, the tongue connection body and air outlet are provided at the air outlet, fan blade is rotating
When, the kinetic energy for driving air-flow to generate generates noise in the tongue；The tongue is provided with denoising structure, the drop
Structure of making an uproar is located on the tongue, and the kinetic energy that air-flow generates is changed, and reaches the phase shift of audio, forms phase
Difference, to reduce the noise of blower.
Further, the denoising structure is set as noise reduction slot, and there are two the noise reduction slot settings, is evenly distributed on
The vertical direction of the tongue, through the tongue, the upper end of tongue described in the noise reduction slot connection of upper end will
The pneumatic noise that fan blade is formed forms phase difference, noise cancellation is carried out, to reduce noise.
Further, the denoising structure is set as noise abatement buffer strip；The noise abatement buffer strip is provided with demotion slot
With raise-position slot；The demotion slot position is distributed in the tongue, the vertical direction along the tongue；The raise-position slot position
In the side of the demotion slot, the vertical direction along the tongue is distributed, parallel with the demotion slot.
Further, the demotion slot is provided with a plurality of, is extended along the tongue outer phase, height and position is gradually
Successively decrease.
Further, the raise-position slot is provided with a plurality of, positioned at the side of the demotion slot, along the demotion slot
A side to the tongue internal stretch, height and position is stepped up relative to the height of the demotion slot.
Further, the denoising structure is set as lateral noise reduction slot, and the lateral noise reduction slot position is in the tongue
The top in portion, is transversely arranged.
Further, the lateral noise reduction slot is provided with multiple, and the vertical direction along the tongue is arranged, same to time delay
Extend to the middle position cut-off of the tongue.
The beneficial effects of the present invention are: a kind of method of blower noise reduction provided by the invention is dropped using being arranged in tongue
It makes an uproar structure, changes kinetic energy of the air-flow when passing through tongue and cancelled out each other to influence the phase shift of noise, to drop
Low noise decibel reduces noise, effectively improves using comfort under the premise of guaranteeing blower sizes and installation space.
Detailed description of the invention
Attached drawing 1 is the schematic diagram of the structure of the preferred embodiment of the present invention.
Attached drawing 2 is a kind of schematic diagram of denoising structure of the preferred embodiment of the present invention.
Attached drawing 3 is a kind of schematic diagram of denoising structure of the preferred embodiment of the present invention.
Attached drawing 4 is a kind of schematic diagram of denoising structure of the preferred embodiment of the present invention.
Attached drawing 5 is the noise reduction phase schematic diagram of the preferred embodiment of the present invention.
Wherein: 1. bodies, 2. air outlets, 3. tongues, 4. denoising structures, 5. noise reduction slots, 6. noise abatement buffer strips, 7. demotion
Slot, 8. raise-position slots, 9. lateral noise reduction slots.
Specific embodiment
In order to better understand technical solution provided by the invention, with reference to the accompanying drawing with specific embodiment to this hair
It is bright to be described further.
As shown in the picture, a kind of method of blower noise reduction, including body 1,1 inside of body are in around fan blade
Circular distribution；It is internally provided with air outlet 2 in the body 1, the air outlet 2 is located at the side of the body 1, connection
Lead to the outside of the body 1；Tongue 3 is provided at the air outlet 2, the tongue 3 connects the body 1 and goes out
Air port 2, when rotated, the kinetic energy for driving air-flow to generate generates noise in the tongue 3 to fan blade；In the tongue 3
It is provided with denoising structure 4, the denoising structure 4 is located on the tongue 3, and the kinetic energy that air-flow generates is changed, is arrived
Up to the phase shift of audio, phase difference is formed, to reduce the noise of blower.
The first embodiment: the denoising structure 4 is set as noise reduction slot 5, and there are two the settings of noise reduction slot 5,
The even vertical direction for being distributed in the tongue 3, through the tongue 3, tongue described in 5 connection of noise reduction slot of upper end
The upper end in portion 3, the pneumatic noise that fan blade is formed form phase difference, noise cancellation are carried out, to reduce noise.
Second of embodiment: the denoising structure 4 is set as noise abatement buffer strip 6；The noise abatement buffer strip 6 is provided with
Demotion slot 7 and raise-position slot 8；The demotion slot 7 is located at the tongue 3, and the vertical direction along the tongue 3 is distributed；Institute
The raise-position slot 8 stated is located at the side of the demotion slot 7, and the vertical direction along the tongue 3 is distributed, with the demotion slot
7 is parallel.
Further, the demotion slot 7 is provided with a plurality of, is extended along the 3 outer phase of tongue, height and position by
Step is successively decreased.
Further, the raise-position slot 8 is provided with a plurality of, positioned at the side of the demotion slot 7, along the demotion
One side of slot 7 is stepped up to 3 internal stretch of tongue, height and position relative to the height of the demotion slot 7.
The third embodiment: the denoising structure 4 is set as lateral noise reduction slot 9, and the lateral noise reduction slot 9 is located at institute
The top for the tongue 3 stated, is transversely arranged.
Further, the lateral noise reduction slot 9 is provided with multiple, and the vertical direction along the tongue 3 is arranged, simultaneously
Extend to the middle position cut-off of the tongue 3.
In use, the noise reduction slot 5 changes its audio frequency phase when air-flow passes through, phase difference is generated, and then offset and make an uproar
Sound audio, to reduce noise；The noise abatement buffer strip 6 changes its audio frequency phase when passing through also in air-flow, using passing
The demotion slot 7 and raise-position slot 8 for subtracting and being incremented by change audio frequency phase, and offset noise audio reaches noise reduction purpose；The lateral drop
Slot 9 of making an uproar transversely is distributed, and in the top half of the tongue 3, is changed the audio frequency phase of a part of air-flow, is formed phase difference,
Phase cancellation is carried out with the original audio of air-flow, reduces noise.
Finally, it should be noted that property technical side the above examples are only used to illustrate the technical scheme of the present invention and are not limiting
Case, those skilled in the art should understand that, modification or equivalent replacement of the technical solution of the present invention are made for those, and
The objective and range for not departing from the technical program, are intended to be within the scope of the claims of the invention.
Claims (7)
1. a kind of method of blower noise reduction, which is characterized in that including body, the internal body is rounded around fan blade
Distribution；The internal body is provided with air outlet, the air outlet is located at the side of the body, described in connection
The outside of body；Tongue, the tongue connection body and air outlet, fan blade are provided at the air outlet
When rotated, the kinetic energy for driving air-flow to generate generates noise in the tongue；The tongue is provided with denoising structure, institute
The denoising structure stated is located on the tongue, and the kinetic energy that air-flow generates is changed, the phase shift of audio is reached, and is formed
Phase difference, to reduce the noise of blower.
2. a kind of method of blower noise reduction according to claim 1, which is characterized in that the denoising structure is set as dropping
It makes an uproar slot, there are two the noise reduction slot settings, it is evenly distributed on the vertical direction of the tongue, through the tongue, on
The upper end of tongue described in the noise reduction slot connection at end, the pneumatic noise that fan blade is formed form phase difference, carry out
Noise cancellation, to reduce noise.
3. a kind of method of blower noise reduction according to claim 1, which is characterized in that the denoising structure is set as subtracting
It makes an uproar buffer strip；The noise abatement buffer strip is provided with demotion slot and raise-position slot；The demotion slot position is in the tongue, along institute
The vertical direction for the tongue stated is distributed；The raise-position slot position is in the side of the demotion slot, along the vertical of the tongue
Directional spreding, it is parallel with the demotion slot.
4. a kind of method of blower noise reduction according to claim 3, which is characterized in that the demotion slot is provided with more
Item extends along the tongue outer phase, and height and position gradually successively decreases.
5. a kind of method of blower noise reduction according to claim 3, which is characterized in that the raise-position slot is provided with more
Item, positioned at the side of the demotion slot, along a side of the demotion slot to the tongue internal stretch, height and position phase
The height of the demotion slot is stepped up.
6. a kind of method of blower noise reduction according to claim 1, which is characterized in that the denoising structure is set as horizontal
To noise reduction slot, the lateral noise reduction slot position is transversely arranged in the top of the tongue.
7. a kind of method of blower noise reduction according to claim 6, which is characterized in that the lateral noise reduction slot is provided with
Multiple, the vertical direction along the tongue is arranged, while extending to the middle position cut-off of the tongue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811098714.5A CN109210015B (en) | 2018-09-20 | 2018-09-20 | Noise reduction method for fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811098714.5A CN109210015B (en) | 2018-09-20 | 2018-09-20 | Noise reduction method for fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109210015A true CN109210015A (en) | 2019-01-15 |
| CN109210015B CN109210015B (en) | 2024-07-23 |
Family
ID=64985346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811098714.5A Active CN109210015B (en) | 2018-09-20 | 2018-09-20 | Noise reduction method for fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109210015B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1496603A (en) * | 1974-08-27 | 1977-12-30 | Gavels Arkitektkontor Ab | Roadside noise-protection screens |
| CA1154044A (en) * | 1980-04-28 | 1983-09-20 | James Blakeley | Self-compensation gasket for grooved end pipe couplings |
| CN1242722A (en) * | 1997-01-02 | 2000-01-26 | 北京清华天同科技有限公司 | Screenless vibrator separator |
| US20060099071A1 (en) * | 2004-11-05 | 2006-05-11 | Ping-Sheng Kao | Centrifugal fan |
| JP2008280939A (en) * | 2007-05-11 | 2008-11-20 | Mitsubishi Heavy Ind Ltd | Centrifugal blower |
| CN106032810A (en) * | 2015-03-21 | 2016-10-19 | 重庆东宏鑫科技有限公司 | Fast denoising blower fan |
| CN106351882A (en) * | 2016-11-10 | 2017-01-25 | 华中科技大学 | Cross flow fan with volute tongue structure |
-
2018
- 2018-09-20 CN CN201811098714.5A patent/CN109210015B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1496603A (en) * | 1974-08-27 | 1977-12-30 | Gavels Arkitektkontor Ab | Roadside noise-protection screens |
| CA1154044A (en) * | 1980-04-28 | 1983-09-20 | James Blakeley | Self-compensation gasket for grooved end pipe couplings |
| CN1242722A (en) * | 1997-01-02 | 2000-01-26 | 北京清华天同科技有限公司 | Screenless vibrator separator |
| US20060099071A1 (en) * | 2004-11-05 | 2006-05-11 | Ping-Sheng Kao | Centrifugal fan |
| JP2008280939A (en) * | 2007-05-11 | 2008-11-20 | Mitsubishi Heavy Ind Ltd | Centrifugal blower |
| CN106032810A (en) * | 2015-03-21 | 2016-10-19 | 重庆东宏鑫科技有限公司 | Fast denoising blower fan |
| CN106351882A (en) * | 2016-11-10 | 2017-01-25 | 华中科技大学 | Cross flow fan with volute tongue structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109210015B (en) | 2024-07-23 |
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