CN104019687B - Heat sink with heights of protrusions decreasing along main fins - Google Patents
Heat sink with heights of protrusions decreasing along main fins Download PDFInfo
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- CN104019687B CN104019687B CN201410253120.2A CN201410253120A CN104019687B CN 104019687 B CN104019687 B CN 104019687B CN 201410253120 A CN201410253120 A CN 201410253120A CN 104019687 B CN104019687 B CN 104019687B
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- 230000003247 decreasing effect Effects 0.000 title 1
- 230000007423 decrease Effects 0.000 abstract description 3
- 238000004134 energy conservation Methods 0.000 abstract 1
- 238000012546 transfer Methods 0.000 description 12
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- 230000008859 change Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
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- 238000000034 method Methods 0.000 description 4
- 230000003416 augmentation Effects 0.000 description 3
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 241001269238 Data Species 0.000 description 1
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- 229910052786 argon Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
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- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 229910052726 zirconium Inorganic materials 0.000 description 1
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Abstract
The invention provides a cylindrical heat sink. The heat sink comprises a cuboid located in the center and a fin set located on the periphery of the cuboid. The cross section of the cuboid is square. The fin set comprises four main fins extending outwards from the opposite angles of four squares, and first auxiliary fins extending outwards from the main fins. Protrusions are arranged on the first auxiliary fins, and the heights of the protrusions on the first auxiliary fins gradually decrease from the fin roots to the fin tops of the main fins. The structure of the heat sink is optimized, so that the heat exchange efficiency of the heat sink is maximized, energy is saved, and the purposes of environment protection and energy conservation are achieved.
Description
Technical field
The invention belongs to field of heat exchangers, particularly relate to a kind of radiator used that dispels the heat, belong to the field of heat exchangers of F28D.
Background technology
In radiator; be suitable for finned tubular radiator widely at present; area of dissipation can be expanded by fin; strengthen heat transfer effect; but the quality of the setting of the fansink-type of finned tube and finned tube parameter all influencer's radiating effect; and at present when energy crisis; urgent need wants economize energy; meet the sustainable development of society; therefore need to develop a kind of new finned tube, need the structure of finned tube to be optimized simultaneously, make it reach maximum heat exchange efficiency; with economize energy, reach the object of environmental protection and energy saving.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of prismatic finned tubular radiator newly.
To achieve these goals, technical scheme of the present invention is as follows:
A kind of column radiator, described radiator comprises the cuboid being positioned at center and the fins set being positioned at cuboid periphery, the cross section of described cuboid is square, described fins set comprises from four outward extending main fins in foursquare diagonal angle with from the outward extending first secondary fin of main fin, described fins set also comprises the outward extending second secondary fin from foursquare four limits, the first secondary fin extended to same direction of described same main fin is parallel to each other, and it is parallel to each other with the second secondary fin extended to same direction, the end that described main fin and secondary fin extend forms equilateral octagon.
First and/or second secondary fin arranges projection, and on same secondary fin, from the wing root of the connecting portion of cuboid to wing top, protruding density constantly reduces.
Angle between described first secondary fin and main fin is 45 °, and the distance of described adjacent secondary fin is L1, and the described foursquare length of side is L0, and the height of described main fin is L2, and the relation of above-mentioned three meets following formula:
L1/L0=a*ln (L2/L0)+b, wherein ln is logarithmic function, 0.22<a<0.24,0.20<b<0.23,
40mm<＝L0<＝60mm,10mm<＝L1<＝25mm,55mm<＝L2<＝85mm；
0.2<L1/L0<0.42,1.2<L2/L0<2.0；
The height of radiator is H, 100mm<H<300mm.
Preferred a=0.24, b=0.22
Compared with prior art, radiating appliance of the present invention has following advantage:
1) the invention provides a kind of new radiator, and because radiator can arrange more radiating fin, therefore there is good radiating effect.
2) the present invention is by test of many times, obtains an optimum radiator optimum results, and is verified by test, thus demonstrate the accuracy of result.
3) boundary member formed by fin is octagon, can make can combine mutually in any position between same row's fin, while raising heat-transfer effect, forms the effect of overall appearance.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of an embodiment;
Fig. 2 is the plan structure schematic diagram of an embodiment;
Fig. 3 is the close-up schematic view of Fig. 2;
Fig. 4 is 1/8 structural representation of an embodiment;
Fig. 5 is the sectional drawing arranging protruding fin;
Fig. 6 is the front elevation arranging protruding fin;
Fig. 7 is the schematic diagram of protruding stagger arrangement.
Reference numeral is as follows:
1. cuboid, 2. fins set, 3. main fin, 4 second secondary fins, 5 first secondary fins, 6 is protruding.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Herein, if do not have specified otherwise, relate to formula, "/" represents division, "×", " * " represent multiplication.
A kind of column radiator, described radiator comprises the cuboid 1 being positioned at center and the fins set 2 being positioned at cuboid periphery, the cross section of described cuboid 1 is square, from cross section, described fins set 2 comprises from four outward extending main fins 3 in foursquare diagonal angle with from the outward extending first secondary fin 5 of main fin 3, described fins set 2 also comprises the outward extending second secondary fin 4 from foursquare four limits, extend to same direction first secondary fin 5 of described same main fin 3 is parallel to each other, and it is parallel to each other with the extend to same direction second secondary fin 4, described main fin 3 and secondary fin 4, 5 ends extended form equilateral octagon.
Preferably, as shown in Figure 2, the plane specular that radiator is formed along square diagonal, the plane simultaneously formed along the line at the mid point place of foursquare two opposite side is also specular.
Preferably, as shown in Figure 2, the center line of main fin 3 is vertical with an equilateral octagonal limit and be positioned at the mid point on equilateral octagonal limit with equilateral octagonal tie point.
As shown in Figure 2, preferably, the second secondary fin 2 ", the 2 ' position being arranged on foursquare diagonal angle.
As Figure 2-3,1 ', 2 ', 1 ", 2 " the secondary fin of indication is the second secondary fin, 3 ', 4 ', 5 ', 3 ", 4 ", 5 " the secondary fin of indication is the first secondary fin.
The length of the first secondary fin is along with shorter and shorter apart from the distance at main fin diagonal angle.
When the length on foursquare limit is certain, main fin and secondary fin longer, then heat transfer effect is better in theory, find in process of the test, when main fin and secondary fin reach certain length time, then heat transfer effect just increases very not obvious, main because along with main fin and the increase of secondary finned length, also more and more lower in the temperature of flight tip, along with temperature is reduced to a certain degree, heat transfer effect then can be caused not obvious, also add the cost of material on the contrary, simultaneously, in heat transfer process, if radiator height is too high or spacing between secondary fin is too little, also the deterioration of heat transfer effect is easily caused, because along with the increase of height, boundary layer is thickening, boundary layer between adjacent fins is caused to overlap mutually, worsen heat transfer, spacing between the too low or secondary fin of radiator height causes too greatly heat exchange area to reduce, have impact on the transmission of heat, therefore in the distance of adjacent secondary fin, the foursquare length of side, an optimized size relationship is met between the length of main fin and the height of radiator.
Therefore, the present invention is the dimensionally-optimised relation of the radiator of the best summed up by thousands of test datas of the radiator of multiple different size.
Angle between described first secondary fin and main fin is 45 °, and the distance of described adjacent secondary fin is L1, and the described foursquare length of side is L0, and the height of described main fin is L2, and the relation of above-mentioned three meets following formula:
L1/L0=a*ln (L2/L0)+b, wherein ln is logarithmic function, 0.22<a<0.24,0.20<b<0.23,
40mm<＝L0<＝60mm,10mm<＝L1<＝25mm,55mm<＝L2<＝80mm；
0.2<L1/L0<0.42,1.2<L2/L0<2.0；0.03<L1/H<＝0.15。
The height of radiator is H, 100mm<H<300mm.Preferred 150-220mm.
Preferred a=0.24, b=0.22,10mm<=L1<=14mm.
It should be noted that, the distance L1 of adjacent pair fin is the distance counted from the center of secondary fin.
By testing after result of calculation, by the numerical value of computation bound and median, the result of gained matches with formula substantially, and error is substantially within 3%, and maximum relative error is no more than 5%, and mean error is 1.8% again.
Preferably, the distance of described adjacent secondary fin is identical.Angle wherein between the first secondary fin 5 and main fin 4 is 45 ° and means the limit of secondary fin 5 perpendicular to main fin diagonal angle, simultaneously because secondary fin is parallel to each other, makes the foursquare limit that the second secondary fin extends perpendicular to it.Mainly fully dispel the heat for reducing flow dead, the fin design around prismatic radiator becomes the form vertical respectively with four limits of middle cuboid.
As preferably, the width of main fin is greater than the width of secondary fin.
Preferably, the width of main fin is b4, and the width of secondary fin is b2, wherein 2.5*b2<b4<3.5*b2;
As preferably, the width of main fin and the length relation on foursquare limit are 0.06*L0<b4<0.10*L0.
As preferably, described cuboid 1 is solid conductive structure.Adopt solid construction, then the cuboid 1 of radiator is mainly used in heat conduction, by heat from the bottom conductive of cuboid 1 to whole cuboid 1, then by the outside heat loss through convection of fin.Such as may be used for high-power LED radiator, be particularly a kind ofly applied to room lighting, road lighting, industrial and mineral illumination and the LED radiator of furnishing fields.
Preferably, the heat dissipation capacity of LED radiator is 65-140W.Now the size relationship of above-mentioned optimum can obtain optimum realization.
As preferably, the material of radiator is aluminium alloy, and the mass percent of the component of described aluminium alloy is as follows: 15.3%Cu, 1.9%Mg, 1.6%Ag, 0.6%Mn, 0.25%Zr, 5.78%Ce, 0.23%Ti, 0.38%Si, and all the other are Al.
The manufacture method of aluminium alloy is: adopt vacuum metallurgy melting, and argon for protecting pouring becomes circle base, through 623 DEG C of Homogenization Treatments, at 412 DEG C, adopts and is hot extruded into bar, and then after 560 DEG C of solution hardening, carry out artificial aging process at 210 DEG C.Thermal conductivity factor is for being greater than 270W/ (m*k).
Compared with former research, by strengthening Cu and Ce content, the corrosion resistance of aluminum alloy materials can be optimized greatly, also there is high thermal conductivity factor simultaneously.
As preferably, there is certain tapering between the wing top of secondary fin and wing root, namely the thickness of secondary fin changes according to certain tapering, and the computing formula of its tapering is:
B＝(b1-b2)/L3
Wherein, b1 is the thickness on wing top, and mm, b2 are the thickness of wing root, and mm, L3 are the length of secondary fin, mm;
0.9mm<＝b1<＝1mm,1.25mm<＝b2<＝1.5mm。
For tapering secondary fin between distance, adopt the distance of the center line between adjacent pair fin to calculate, identical with calculating above.
Preferably, main fin thickness also changes according to certain tapering:
B1＝(b3-b4)/L4,
Wherein, a b3 mistake! Do not find Reference source.For supporting the thickness on wing top, mm, b4 are the thickness supporting wing root, mm.L4 is the length of main fin, and unit is mm.
2.3mm<＝b3<＝2.5mm,4.8mm<＝b4<＝5.5mm。
Preferably, be change according to certain rule for the distance between secondary fin, concrete rule is from the mid point on foursquare limit, to the two ends on limit the secondary fin vertical with foursquare described limit between distance more and more less.
Such as shown in Figure 2, adjacent two secondary fins (be numbered 1 ', the 1 ") spacing being positioned at the mid point both sides on cuboid limit is m, and other secondary spacings of fin diminish greatly and gradually along with the distance of the mid point apart from limit becomes.
Preferably, the amplitude of adjacent fins spacing reduction is identical.Such as fin 1 ', 1 " distance be m, 1 ", 2 " between distance m-n, 2 ", 3 " between distance m-2n, 3 ", 4 " between distance m-3n, the like.
The unit of n, m is above mm.
Under the condition meeting optimization formula above, n preferably distance is 0.5mm.
It is little that spacing of fin presents two broad in the middle, increases again the heat exchange area of fin while that its main purpose being the flow field optimizing this panel region fin as far as possible.Namely under the prerequisite reducing the coefficient of heat transfer not too much, heat exchange area is increased as far as possible to reduce junction temperature as far as possible.
Preferably, as illustrated in figs. 5-7, the first and/or second secondary fin arranges protruding 6, for breakable layer laminar sublayer.Main cause is that secondary fin carries out heat exchange mainly through the convection current of air, air upwards carries out the flowing of free convection bottom the bottom of secondary fin, in the process of air flows upwards, the thickness in boundary layer constantly becomes large, even finally cause the boundary layer between adjacent pair fin to overlap, this kind of situation can cause the deterioration of heat exchange.Therefore boundary layer can be destroyed by arranging protruding 6, thus augmentation of heat transfer.
Preferably, the shape of protruding 6 is semicircle or circular arc.
Preferably, multiple row projection is set, in staggered arrangement between projection, as shown in Figure 7.
As one preferably, along the direction of the flowing of air, the top namely from the bottom of radiator to radiator, the height of protruding 6 constantly raises.Main cause is the direction of the flowing along air, and the thickness in boundary layer constantly increases, and therefore by arranging the projection 6 constantly raised, can make constantly to increase the destructiveness in boundary layer, thus augmentation of heat transfer.
Preferably, protruding 6 the highest height be the 1.15-1.2 of minimum height doubly, preferably 1.17 times.
As one preferably, along the direction of the flowing of air, the top namely from the bottom of radiator to radiator, the density (i.e. quantity) of protruding 6 constantly increases.Main cause is the direction of the flowing along air, and the thickness in boundary layer constantly increases, and therefore by arranging the ever-increasing density of protruding 6, can make constantly to increase the destructiveness in boundary layer, thus augmentation of heat transfer.
Preferably, the density in the place that projection 6 is the closeest is 1.18-1.22 times of the density in the thinnest place, preferably 1.2 times.
As one preferably, on same secondary fin, from wing root (namely and the connecting portion of cuboid) to wing top, the height of protruding 6 constantly reduces.Main cause is from wing root to wing top, and the temperature of fin constantly declines, and therefore the thickness in boundary layer constantly reduces, and by arranging the height of the projection 6 of change, can realize the thickness of the diverse location destroying boundary layer, thus save material.
Preferably, the change relation routine with the PTAT on fin of height of protruding 6.
As one preferably, on same secondary fin, from wing root (namely and the connecting portion of cuboid) to wing top, the density of protruding 6 constantly reduces.Main cause is from wing root to wing top, and the temperature of fin constantly declines, and therefore the thickness in boundary layer constantly reduces, and by arranging the density of the projection 6 of change, can realize the thickness of the diverse location destroying boundary layer, thus save material.
Preferably, the change relation routine with the PTAT on fin of density of protruding 6.
As one preferably, the first secondary fin arranges protruding 6, from the wing root of the main fin connecting portion of cuboid (namely with), to wing top, the height of the projection on the first secondary fin constantly reduces.Such as shown in Fig. 2,3, the height of the projection on the first secondary fin 3 ', 4 ', 5 ' constantly reduces, the height of projection of the first secondary fin 3 ' higher than the height of projection of the secondary fin 4 ' of the first secondary fin 4 ', the first higher than the first secondary fin 5 '.Main cause is from wing root to wing top, and the temperature of main fin constantly declines, thus causes the temperature of secondary fin constantly to decline, therefore the thickness in boundary layer constantly reduces, by arranging the height of the projection 6 of change, the thickness of the diverse location destroying boundary layer can be realized, thus save material.
As one preferably, the first secondary fin arranges protruding 6, from the wing root of the main fin connecting portion of cuboid (namely with), to wing top, the density of the projection on the first secondary fin constantly reduces.Such as shown in Fig. 2,3, the density of the projection on the first secondary fin 3 ', 4 ', 5 ' constantly reduces, the density of protrusions of the first secondary fin 3 ' higher than the density of protrusions of the secondary fin 4 ' of the first secondary fin 4 ', the first higher than the first secondary fin 5 '.Main cause is from wing root to wing top, and the temperature of main fin constantly declines, thus causes the temperature of secondary fin constantly to decline, therefore the thickness in boundary layer constantly reduces, by arranging the density of the projection 6 of change, the thickness of the diverse location destroying boundary layer can be realized, thus save material.
Certainly, the most preferably, also can be the combination of at least two kinds of above-mentioned various ways.
Although the present invention discloses as above with preferred embodiment, the present invention is not defined in this.Any those skilled in the art, without departing from the spirit and scope of the present invention, all can make various changes or modifications, and therefore protection scope of the present invention should be as the criterion with claim limited range.
Claims (2)
1. a column radiator, described radiator comprises the cuboid being positioned at center and the fins set being positioned at cuboid periphery, the cross section of described cuboid is square, described fins set comprises secondary fin and from four outward extending main fins in foursquare diagonal angle, described secondary fin comprise from the outward extending first secondary fin of main fin and from foursquare four limits outward extending second secondary fin, first secondary fin arranges projection, from the wing root of main fin to wing top, the height of the projection on the first secondary fin constantly reduces;
The end that described main fin and secondary fin extend forms equilateral octagon, angle between described first secondary fin and main fin is 45 °, and the distance of adjacent secondary fin is L1, and the described foursquare length of side is L0, the height of described main fin is L2, meets following formula:
L1/L0=a*ln (L2/L0)+b, wherein ln is logarithmic function,
0.22<a<0.24,0.20<b<0.23，
40mm<=L0<=60mm,
10mm<=L1<=25mm,
55mm<=L2<=85mm;
0.2<L1/L0<0.42,
1.2<L2/L0<2.0;
The height of radiator is H, 0.03<L1/H<=0.15;
100mm<H<300mm。
2. radiator as claimed in claim 1, is characterized in that a=0.24, b=0.22.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410253120.2A CN104019687B (en) | 2014-06-09 | 2014-06-09 | Heat sink with heights of protrusions decreasing along main fins |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410253120.2A CN104019687B (en) | 2014-06-09 | 2014-06-09 | Heat sink with heights of protrusions decreasing along main fins |
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| CN104019687A CN104019687A (en) | 2014-09-03 |
| CN104019687B true CN104019687B (en) | 2015-05-06 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2478063Y (en) * | 2001-01-06 | 2002-02-20 | 营口港信铝材有限公司 | Fin hollowed aluminium alloy energy saving radiator |
| CN1391080A (en) * | 2001-06-12 | 2003-01-15 | 株式会社神户制钢所 | Heat transferring tube for downward flow fluid membrane distiller |
| CN102301197A (en) * | 2009-02-05 | 2011-12-28 | 松下电器产业株式会社 | Heat exchanger |
-
2014
- 2014-06-09 CN CN201410253120.2A patent/CN104019687B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2478063Y (en) * | 2001-01-06 | 2002-02-20 | 营口港信铝材有限公司 | Fin hollowed aluminium alloy energy saving radiator |
| CN1391080A (en) * | 2001-06-12 | 2003-01-15 | 株式会社神户制钢所 | Heat transferring tube for downward flow fluid membrane distiller |
| CN102301197A (en) * | 2009-02-05 | 2011-12-28 | 松下电器产业株式会社 | Heat exchanger |
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| CN104019687A (en) | 2014-09-03 |
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