CN203978931U - The axial fan of low preiodic type intake grill - Google Patents
The axial fan of low preiodic type intake grill Download PDFInfo
- Publication number
- CN203978931U CN203978931U CN201420281162.2U CN201420281162U CN203978931U CN 203978931 U CN203978931 U CN 203978931U CN 201420281162 U CN201420281162 U CN 201420281162U CN 203978931 U CN203978931 U CN 203978931U
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- Prior art keywords
- intake grill
- section
- elementary cells
- axial fan
- grill section
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- Expired - Lifetime
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- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The utility model discloses a kind of axial fan of low preiodic type intake grill, include housing and impeller, this housing has a containing space, this impeller is installed in containing space, this containing space has intake grill section and exhaust outlet section, this intake grill section and exhaust outlet section have same central axis, this impeller is right against intake grill section and exhaust outlet section, wherein, described intake grill section comprises centered by above-mentioned central axis, four elementary cells that Yi90°Wei unit divides, have at least two elementary cells different in these four elementary cells.By this, different by four elementary cells of intake grill section being designed to at least two, destroyed the periodicity of housing intake grill section radiated noise, improved the sound quality of fan.
Description
Technical field
The utility model relates to axial fan art, refers in particular to a kind of axial fan of low preiodic type intake grill.
Background technique
Along with developing rapidly of electronic industry, electronic product is pursued high-speedization of operation more, multifunction and miniaturization, derivative heat dissipation problem is more and more serious thus, if heat is not distributed timely and effectively, can greatly affect the service behaviour of electronic component, also can reduce the working life of electronic component simultaneously.Therefore, be conventionally sticked on heat-generating electronic elements radiator adopt axial fan to produce forced draft to accelerate heat radiation to radiator blowing of industry, or directly adopt a fan to carry out wind-cooling heat dissipating to heat-generating electronic elements.
Nowadays also more and more higher for the quiet requirement of fan, especially also more and more higher to the requirement of sound quality, therefore, the noise problem of fan is the problem that industry is needed solution badly always, the noise of fan generally comprises mechanical vibration noise and aerodynamic noise, the latter is called again aerodynamic noise, and aerodynamic noise is divided into wideband noise and narrow frequency band noise.Wherein, wideband noise is air-flow while skimming over body surface, and the viscosity of gas can form turbulent boundary layer at body surface, and in this boundary layer, turbulent flow constantly forms, decays and swings along flow direction, thereby the pressure field that produces a fluctuating, this pressure field is turbulent flow sound source; Narrow frequency band noise is that the air-flow of vane channel periodically strikes on housing, rib and quiet stator, thereby produce the fixedly noise of tone, when leaving blade afterbody, air-flow can produce separated flow or eddy current, these eddy current can produce periodically noise, at fan inlet, the skewness of axial velocity, along with wheel rotation, causes (periodically) pressure jump and produces noise at tip clearance.Conventional axial-flow fan has intake grill section and exhaust outlet section, and when not considering rib or quiet stator, its intake grill section inwall is to be repeated to form for four times by 4 identical elementary cells, and each elementary cell is 90 degree along the shared angle of exhaust outlet section circumference.Therefore can send regular radiated noise, and due to the periodicity of its distribution, their radiated noise will form synergistic effect, produces higher narrow frequency band noise, also just means the sound quality variation of fan integral body.Therefore, the intake grill segment structure of reply axial fan improves, and to solve noise problem, improves its sound quality.
Model utility content
In view of this, the utility model is for the disappearance of prior art existence, its main purpose is to provide a kind of axial fan of low preiodic type intake grill, different by four elementary cells of intake grill section being designed to at least two, destroy the periodicity of fan radiated noise, improved fan sound quality.
For achieving the above object, the utility model adopts following technological scheme:
A kind of axial fan of low preiodic type intake grill, include housing and impeller, this housing has a containing space, this impeller is installed in containing space, this containing space has intake grill section and exhaust outlet section, this intake grill section and exhaust outlet section have same central axis, this impeller is right against intake grill section and exhaust outlet section, wherein, described intake grill section comprises centered by above-mentioned central axis, four elementary cells that Yi90°Wei unit divides, have at least two elementary cells different in these four elementary cells.
As a kind of preferred version: four elementary cells of described intake grill section are different.
As a kind of preferred version: four elementary cells of described intake grill section are identical between two.
As a kind of preferred version: two elementary cells of described intake grill section on diagonal are identical between two.
As a kind of preferred version: described intake grill section is provided with rounding, has at least the rounding of two elementary cells unequal mutually in four elementary cells.
The utility model compared with prior art has obvious advantage and beneficial effect, particularly, as shown from the above technical solution, different by four elementary cells of intake grill section being designed to at least two, no matter what form thus is 2 preiodic type intake grill sections or 1 preiodic type intake grill section, this novel air inlet mouth section can be assigned to the sound wave in 1 frequency range in 2 or more frequency range, thereby, destroy the periodicity of fan radiated noise, weaken the narrow-band peak value that intake grill section produces, promote the sound quality of fan.
For more clearly setting forth structure characteristic of the present utility model and effect, below in conjunction with accompanying drawing and specific embodiment, be described in detail.
Accompanying drawing explanation
Fig. 1 is the axial fan schematic perspective view of the utility model;
Fig. 2 is that the elementary cell of the utility model is divided schematic diagram;
Fig. 3 is the A-A place cross-sectional schematic of existing axial fan;
Fig. 4 is the B-B place cross-sectional schematic of existing axial fan;
Fig. 5 is the 1 preiodic type axial fan A-A place cross-sectional schematic of the utility model;
Fig. 6 is the 1 preiodic type axial fan B-B place cross-sectional schematic of the utility model;
Fig. 7 is the 2 preiodic type axial fan A-A place cross-sectional schematic of the utility model;
Fig. 8 is the 2 preiodic type axial fan B-B place cross-sectional schematic of the utility model.
accompanying drawing identifier declaration:
10, housing 11, containing space
12, intake grill section 121, rounding
13, exhaust outlet section 14, elementary cell
20, impeller 30, central axis.
Embodiment
The utility model as Fig. 1,2 and Fig. 5 to Fig. 8 as shown in, a kind of axial fan of low preiodic type intake grill, includes housing 10 and impeller 20, wherein:
This housing 10 has a containing space 11, above-mentioned impeller 20 is installed in this containing space 11, this containing space 11 has intake grill section 12 and exhaust outlet section 13, this intake grill section 12 and exhaust outlet section 13 have same central axis 30, this impeller 20 is right against intake grill section 12 and exhaust outlet section 13, this intake grill section 12 is rounded, and these intake grill section 12 inwall edges are provided with rounding 121; This intake grill section 12 comprises centered by above-mentioned central axis 30, and four elementary cells 14 that Yi90°Wei unit divides, have at least the rounding 121 of two elementary cells 14 unequal mutually in these four elementary cells 14.Here be divided into two kinds of situations, wherein a kind of is that the rounding 121 of 12 4 elementary cells 14 of intake grill section is different, is respectively R
1, R
2, R
3and R
4(in the situation that not considering rib or quiet stator, 4 90 degree elementary cells 14 are different, and not periodically, the cycle is 1 in other words completely), in any case divide, this intake grill section 12 cannot be by any unit by repeating inferior the obtaining of n (n>1); Another is that the rounding 121 of 12 4 elementary cells 14 of intake grill section is identical between two, is respectively R
1and R
2(in the situation that not considering rib or quiet stator, every 2 90 different degree elementary cells 14 form a new unit, 2 new unit form intake grill section 12, be to be 2 in the cycle, new unit is repeated 2 times, obtain intake grill section 12), can be that the rounding 121 of two elementary cells 14 on diagonal is identical, can be also the rounding 121 of adjacent two elementary cells 14 is identical.And, it should be noted that, four elementary cells 14 of every fan, have 2 or 2 not identical above, be low preiodic type intake grill, specifically this elementary cell 14 is which kind of unit is (such as plain edition, smooth transition type, ruled surface type etc., can be included, but be not limited in this), concrete distributing position and the distribution sequence of each elementary cell 14, all do not do requirement; In addition, intake grill section 12 can be for not waiting fillet, cone angle shape, fillet intake grill section, the taper intake grill section and mix shape intake grill etc. such as not.
The utility model principle is as follows: by 12 4 elementary cells 14 of intake grill section be set to different or identical between two after, reduced the periodicity of intake grill section 12 noises, the phase place of the sound wave of fan generation is offset, destroyed the periodicity of fan noise, its peak value cannot be overlapped completely, be equivalent to the acoustic wave energy in 1 frequency range to assign in a plurality of frequency ranges, weakened the synergistic effect of noise, thereby improved fan sound quality.
Design focal point of the present utility model is, different by four elementary cells of intake grill section being designed to at least two, no matter what form thus is 2 preiodic type intake grill sections or 1 preiodic type intake grill section, this novel air inlet mouth section can be assigned to the sound wave in 1 frequency range in 2 or more frequency range, thereby, destroy the periodicity of fan radiated noise, weaken the narrow-band peak value that intake grill section produces, promote the sound quality of fan.
The above, it is only preferred embodiment of the present utility model, not technical scope of the present utility model is imposed any restrictions, therefore every foundation technical spirit of the present utility model, to any trickle modification made for any of the above embodiments, equivalent variations and modification, all still belongs in the scope of technical solutions of the utility model.
Claims (5)
1. the axial fan of a low preiodic type intake grill, include housing and impeller, this housing has a containing space, this impeller is installed in containing space, this containing space has intake grill section and exhaust outlet section, this intake grill section and exhaust outlet section have same central axis, this impeller is right against intake grill section and exhaust outlet section, it is characterized in that: described intake grill section comprises centered by above-mentioned central axis, four elementary cells that Yi90°Wei unit divides, have at least two elementary cells different in these four elementary cells.
2. the axial fan of low preiodic type intake grill according to claim 1, is characterized in that: four elementary cells of described intake grill section are different.
3. the axial fan of low preiodic type intake grill according to claim 1, is characterized in that: four elementary cells of described intake grill section are identical between two.
4. according to the axial fan of the low preiodic type intake grill under claim 3, it is characterized in that: two elementary cells of described intake grill section on diagonal are identical between two.
5. according to the axial fan of the low preiodic type intake grill under claim 1, it is characterized in that: described intake grill section is provided with rounding in four elementary cells, having at least the rounding of two elementary cells unequal mutually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420281162.2U CN203978931U (en) | 2014-05-29 | 2014-05-29 | The axial fan of low preiodic type intake grill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420281162.2U CN203978931U (en) | 2014-05-29 | 2014-05-29 | The axial fan of low preiodic type intake grill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203978931U true CN203978931U (en) | 2014-12-03 |
Family
ID=51976383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420281162.2U Expired - Lifetime CN203978931U (en) | 2014-05-29 | 2014-05-29 | The axial fan of low preiodic type intake grill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203978931U (en) |
-
2014
- 2014-05-29 CN CN201420281162.2U patent/CN203978931U/en not_active Expired - Lifetime
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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: 20141203 |