CN1782947A - High efficiency porous radiation fin array - Google Patents
High efficiency porous radiation fin array Download PDFInfo
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- CN1782947A CN1782947A CN 200410098007 CN200410098007A CN1782947A CN 1782947 A CN1782947 A CN 1782947A CN 200410098007 CN200410098007 CN 200410098007 CN 200410098007 A CN200410098007 A CN 200410098007A CN 1782947 A CN1782947 A CN 1782947A
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- radiating fin
- flow
- perforate
- air
- fin array
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- 230000005855 radiation Effects 0.000 title description 8
- 239000000758 substrate Substances 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 3
- 238000001228 spectrum Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The porous heat radiating fin array includes several heat radiating fins vertically connected to the base. Each of the heat radiating fins includes at least one raised porous structure in the same or different sides of the fin. The raised porous structure includes two stepped structures with holes in between, with each of the stepped surface being parallel to the inflowing airflow direction. The holes form at most two upwind ends in the single airflow path.
Description
Technical field
The present invention relates to a kind of high efficiency porous type heat radiation array, particularly relate to a kind of high efficiency porous type heat radiation array that is applied in the mobile computer.
Background technology
Along with the market demand of computing machine in response to slimming, mobile computer casing inside can't reserve enough natural convection spaces, for the required space of heat dissipation design.Especially at high-frequency component (for example central processing unit and drawing chip), faced the bottleneck that heat dissipation design is carried out.Therefore, add the rotating speed of big fan, the average convection coefficient (Average convectionco-efficiency) that improves between radiating fin and air has been the primary structure of present mobile computer cooling mechanism.
Figure 1A illustrates a kind of existing radiating fin array synoptic diagram.Existing aluminium extruded type radiating fin array 100 when air-flow 102 is blown over radiating fin, can produce the velocity flow profile 104 as parabolic flow (Poiseuille flow).This specific velocity flow profile 104 can produce the noise spectrum curve 106 as Figure 1B.The high point of spectrum curve 106a is high more to be easy to generate the influence of making us unhappy more.
In case need to improve heat dissipation, certainly will will increase air quantity (wind speed).Yet the increase in flow field will make noise improve, thereby cause the bottleneck that is difficult to accept or reject on noise and the heat radiation subject under discussion.How to solve the challenge that this awkward predicament has become mobile computer manufacturer to be about to face.
Summary of the invention
Therefore the object of the present invention is to provide a kind of high efficiency porous type heat radiation array, in order to the increase radiating efficiency, and noise-decreasing.
According to above-mentioned purpose of the present invention, a kind of porous type radiating fin array is proposed.This radiating fin array comprises that multi-disc uprightly is connected in suprabasil radiating fin.Every radiating fin comprises a floating convex porous structure at least, is positioned at the same one side of radiating fin or not on the coplanar.This floating convex porous structure comprises two notch cuttype structures, and the drop face of adjacent terrace forms perforate, and each terrace is parallel to the airflow direction of inflow.The formed windward side of above-mentioned perforate on the path of single air-flow, is no more than two.
By the invention described above preferred embodiment as can be known, use the present invention and have following advantage: (1) low noise, and the design that has fine qualities; (2) the runner basal area in the radiating fin array is constant, therefore can not improve choked flow; And the optimal design of (3) floating convex porous structure, use the long-pending increase of radiating fin array surface, and effectively increase the quantity of windward side (leading ledge).
Description of drawings
Figure 1A is a kind of existing radiating fin array synoptic diagram;
Figure 1B is the noise spectrum distribution plan that existing radiating fin produced shown in a kind of Figure 1A;
Fig. 2 is a kind of porous type radiating fin of a preferred embodiment of the present invention and the synoptic diagram of air-flow relation;
Fig. 3 is the synoptic diagram of a kind of porous type radiating fin of a preferred embodiment of the present invention and air-flow, temperature relation;
Fig. 4 A is the synoptic diagram of a kind of porous type radiating fin array of a preferred embodiment of the present invention; And
Fig. 4 B is the noise spectrum distribution plan that a kind of porous type radiating fin array that is illustrated as Fig. 4 A is produced.
Embodiment
In order to solve the problem that is difficult to accept or reject on noise and the heat radiation subject under discussion, the present invention proposes a kind of dynamical porous type radiating fin array.This dynamical Fin chip arrays is designed the floating convex porous structure by on every radiating fin in array, not only increases area of dissipation and windward side (leading ledge) quantity, and helps noise-decreasing.
Please refer to Fig. 2, it illustrates according to a kind of porous type radiating fin of a preferred embodiment of the present invention and the synoptic diagram of air-flow relation.The radiating fin 200 of this preferred embodiment has designed floating convex porous structure 201a, 201b and 201c in order to increase area of dissipation and windward side (leading ledge) quantity.Each floating convex porous structure includes two notch cuttype structures, and for example floating convex porous structure 201a has comprised notch cuttype structure 202 and 204.Drop face between the adjacent terrace in the notch cuttype structure all is open-celled structures, and for example adjacent terrace 202e in the notch cuttype structure 202 and the drop face 202a between 202f are exactly a perforate, can allow the air communication mistake.The rest may be inferred, and the drop face 202b between adjacent terrace 202f and 202g also is a perforate, and the drop face 202c between adjacent terrace 202g and 202h also is a perforate phase, and the drop face 202d between adjacent terrace 202h and 202i also is a perforate.Above-mentioned terrace (202e, 202f, 202g, 202h, 202i) with the drop face (202a, 202b, 202c, 202d) orthogonal.In the present embodiment, though the floating convex porous structure is positioned at the same one side of radiating fin, the floating convex porous structure is not limited to the same one side of radiating fin.
The notch cuttype structure that the floating convex porous structure is included is by increasing terrace to increase area of dissipation.For example, terrace 202e, 202f, 202g, 202h and 202i in the notch cuttype structure 202, its purpose all is in order to increase area of dissipation.Terrace in the notch cuttype structure should be parallel to air-flow, to reduce flow resistance.In the present embodiment, though the floating convex porous structure comprises two notch cuttype structures, the floating convex porous structure also can include only a notch cuttype structure.
The notch cuttype structure that the floating convex porous structure is included is by increasing drop face (opening) quantity between adjacent terrace, to increase windward side (leading ledge) quantity.For example, opening 202a, 202b, 202c and the 202d in the notch cuttype structure 202 all is windward side (leading ledge).It should be noted that the drop face (opening) of the present invention on the path of single air-flow though number is The more the better, also restricted, it is main being no more than a given number below answering, preferably two.For example, on the path of passing through of air-flow 102a, perforate (windward side) 202a and 204d have been passed through; On the path of passing through of air-flow 102c, perforate (windward side) 204a and 206d have been passed through; On the path of passing through of air-flow 102b, only passed through perforate (windward side) 204c.Yet the preferable windward side quantity on the single air flow path, and above-mentioned given number still may be had some change because using different radiating fin materials, current rate etc.
With reference to Fig. 3, it illustrates the synoptic diagram according to a kind of porous type radiating fin of a preferred embodiment of the present invention and air-flow, temperature relation.The floating convex porous structure of this preferred embodiment also has the characteristics with the radiating airflow temperature relation.The floating convex porous structure of this preferred embodiment, because the notch cuttype structure Design, the feasible perforate (windward side) that intersperses among on the radiating fin can increase to the quantity that is enough to effectively influence radiating efficiency.And the perforate on the path of single air-flow (windward side) is no more than two.The purpose of above-mentioned design is to make each air-flow by perforate on the radiating fin (windward side), and its temperature can be kept minimum.For example, temperature on the radiating fin 200 is 60 ℃, the temperature of air-flow 102a is 30 ℃, when air-flow 102a has passed through perforate (windward side) 202a temperature be 30 ℃, during by perforate (windward side) 204d temperature be 35 ℃ (because of passed through perforate 202a be heated heat up).On the path of passing through of another air-flow 102b, only passed through perforate (windward side) 204c, so temperature is 30 ℃ when by perforate (windward side) 204c.The perforate of radiating fin (windward side) and the temperature difference of flowing through between air-flow are big more, and radiating efficiency is good more.Therefore, the floating convex porous structure of this preferred embodiment not only increases perforate (windward side) quantity, and makes perforate (windward side) and the temperature difference of flowing through between air-flow is kept maximum, and radiating efficiency is maintained in the best.
With reference to Fig. 4 A, it illustrates the synoptic diagram according to a kind of porous type radiating fin array of a preferred embodiment of the present invention.The radiating fin 200 that above-mentioned multi-disc is identical is fixed between upper and lower substrate 210a and 210b, can obtain a porous type radiating fin array.This porous type radiating fin array can cooperate the contact area of heat pipe increase and air in order to heat radiation.The floating convex porous structure of this radiating fin array compares with the radiating fin of the existing identical size of Fig. 1, and the area of section in the runner is constant, and flow resistance (head loss) also can thereby not improve.In addition, several floating convex porous structures change the fixedly direction of travel of air between windward side, thereby improve evenly heat convection coefficient (HM, Average conventionco-efficieny), to improve heat-sinking capability.This porous type radiating fin array also can the increase and decrease to some extent according to runner length.If flow channel length is shorter, can reduce the floating convex porous structure quantity on the every radiating fin, to avoid the density of perforate (windward side) on the Fin sheet too high, cause flow resistance (head loss) to improve.Otherwise, if flow channel length is longer, can increase the floating convex porous structure quantity on the every radiating fin, to increase radiating efficiency.
With reference to Fig. 4 B, it illustrates the noise spectrum distribution plan that a kind of porous type radiating fin array that is illustrated as Fig. 4 A is produced.The floating convex porous structure, no matter the flow field is laminar flow (Laminar flow) or sinuous flow (Turbulent flow), can upset the velocity flow profile of radiating fin array internal fixation, thereby obtain the noise that wider frequency (Hay-stack) distributes, user thereby feel preferable sound quality.Compare with the noise spectrum curve 106 of Figure 1B, the noise spectrum curve 208 that porous type radiating fin array is produced, its spectrum curve high some 208a and whole noise spectrum curve 208 compare, and noise spectrum curve 106 relaxes many.
In addition, the floating convex porous structure of the invention described above is not defined as convex configuration, can be designed to the concave surface porous structure yet, and the effect that is reached also is the same.
By the invention described above preferred embodiment as can be known, use the present invention and have following advantage: (1) low noise, and the design that has fine qualities; (2) the runner basal area in the radiating fin array is constant, therefore can not improve flow resistance; And the optimal design of (3) floating convex porous structure, making the radiating fin array surface amass increases, and effectively increases the quantity of windward side (leading ledge).
Though disclosed the present invention in conjunction with an above preferred embodiment; yet it is not in order to limiting the present invention, anyly is familiar with this operator, without departing from the spirit and scope of the present invention; can be used for a variety of modifications and variations, so protection scope of the present invention should be with being as the criterion that claim was defined.
Claims (6)
1. porous type radiating fin array comprises at least:
One substrate;
The multi-disc radiating fin is arranged in parallel with each other and uprightly is connected in this substrate, is blown into by an end to take away the heat on this each radiating fin through an air-flow; And at least one floating convex porous structure, be positioned on the same one side of each this each radiating fin, wherein this floating convex porous structure comprises two notch cuttype structures, and this two notch cuttypes structure has a plurality of terraces, between adjacent this each terrace, form a drop face, and each this terrace is parallel to airflow direction.
2. porous type radiating fin array as claimed in claim 1, wherein this drop face forms a perforate, in order to allow this air communication mistake.
3. porous type radiating fin array as claimed in claim 1, wherein the formed windward side of this perforate on the path of single air-flow, is no more than two.
4. porous type radiating fin array comprises at least:
One substrate;
The multi-disc radiating fin is arranged in parallel with each other and uprightly is connected in this substrate, is blown into by an end to take away the heat on this each radiating fin through an air-flow; And
At least one floating convex porous structure, be positioned on the same one side of each this each radiating fin, wherein this floating convex porous structure comprises the single order trapezoidal-structure, and this two notch cuttypes structure has a plurality of terraces, between adjacent this each terrace, form a drop face, and each this terrace is parallel to airflow direction.
5. porous type radiating fin array as claimed in claim 1, wherein this drop face forms a perforate, in order to allow this air communication mistake.
6. porous type radiating fin array as claimed in claim 4, wherein the formed windward side of this perforate on the path of single air-flow, is no more than two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100980078A CN100371855C (en) | 2004-12-01 | 2004-12-01 | High efficiency porous radiation fin array |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100980078A CN100371855C (en) | 2004-12-01 | 2004-12-01 | High efficiency porous radiation fin array |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1782947A true CN1782947A (en) | 2006-06-07 |
| CN100371855C CN100371855C (en) | 2008-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100980078A Expired - Fee Related CN100371855C (en) | 2004-12-01 | 2004-12-01 | High efficiency porous radiation fin array |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102261628A (en) * | 2011-08-11 | 2011-11-30 | 陈俊峰 | Simple efficient heat transmitting and dissipating device |
| CN103547118A (en) * | 2012-07-10 | 2014-01-29 | 三星电机株式会社 | Multi-stage heat sink, cooling system with the same and method for controlling the same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2518144Y (en) * | 2001-10-24 | 2002-10-23 | 华孚科技股份有限公司 | Integrated efficiency radiator |
| CN2588531Y (en) * | 2002-11-14 | 2003-11-26 | 李荣裕 | CPU heat sink |
-
2004
- 2004-12-01 CN CNB2004100980078A patent/CN100371855C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102261628A (en) * | 2011-08-11 | 2011-11-30 | 陈俊峰 | Simple efficient heat transmitting and dissipating device |
| CN103547118A (en) * | 2012-07-10 | 2014-01-29 | 三星电机株式会社 | Multi-stage heat sink, cooling system with the same and method for controlling the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100371855C (en) | 2008-02-27 |
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Granted publication date: 20080227 |