CN1851909A - Aluminium-alloy high-power semi-conductor radiator and preparing method - Google Patents
Aluminium-alloy high-power semi-conductor radiator and preparing method Download PDFInfo
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- CN1851909A CN1851909A CN 200610027289 CN200610027289A CN1851909A CN 1851909 A CN1851909 A CN 1851909A CN 200610027289 CN200610027289 CN 200610027289 CN 200610027289 A CN200610027289 A CN 200610027289A CN 1851909 A CN1851909 A CN 1851909A
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Abstract
This invention relates to a large power semiconductor radiator including a radiating fin set composed of a core and several radiating fins, in which, the center of every fin is opened with a round hole in the same diameter with the core, flanged fins are set around the hole, several pivots are fixed between every two radiating fins, several through holes are opened at both sides of the hole on each radiating fin, after the fins are assembled, the ventilation holes on the adjacent two fins are staggered for a position to form a turbulent ventilation channel on the radiator, which designs several ventilation channels vertical to the interlamination to increase the ventilation ability and increase radiation result.
Description
Technical field:
The present invention relates to a kind of radiator and preparation method thereof, particularly a kind of aluminium-alloy high-power semi-conductor device radiator and preparation method thereof.
Background technology:
The radiator of Xiao Shouing all is to cast heat radiator dedicatedly with aluminium in the market, is installed on the semiconductor device then semiconductor device is dispelled the heat.And the quality of heat radiation, major decision radiator material quality.If it is the material conductive coefficient of radiator is poor, also just poor to the device heat radiation.
For heat radiation reaches requirement to device, just must increase the area of dissipation of radiator, or adopt good material to reach the heat radiation requirement.As the Chinese patent Granted publication number is that CN2465324Y disclosed " large power semiconductor device radiator " is exactly good with material, the good T2 red copper of radiating condition sheet material is done fin, copper sheet has carried out the bright nickel plating processing again after polishing simultaneously, make copper sheet maintain light and non-oxidation affects fin heat sinking function, adopting wind speed simultaneously is that 4m/s wind carries out forced air cooling to radiator, make the radiating condition of fin reach best, the case temperature that guarantees silicon controlled crystal brake pipe must be lower than 70 ℃, makes brake tube energy operate as normal.The fin of this radiator is a square, on diagonal, be provided with 4 long be that 25 * height is 2.8 * 45 ° of slope air courses.But also there are many problems in this radiator, that is exactly the interflow that radiating airflow can only be between fin, and laminar condition is become turbulent condition, though can improve the heat-sinking capability of the higher center of circle portion of temperature, but because hot-air can not promptly distribute between the fin, it is not very good causing the entire radiator radiating effect, and red copper costs an arm and a leg very difficult extensive the use.
Summary of the invention:
An object of the present invention is to provide and a kind of hot-air between the fin is distributed rapidly, replenish into rapidly, thereby improve the aluminium-alloy high-power semi-conductor device radiator of radiator integral radiating effect in order to cold air.
Another object of the present invention provides the preparation method of a kind of aluminium-alloy high-power semi-conductor device with radiator.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of large power semiconductor device radiator as first aspect present invention, the groups of fins that comprises two groups of multi-disc assemblings that are installed in brake tube housing both sides, brake tube outwards dispels the heat from the groups of fins on housing both sides, and described groups of fins is made up of aluminum alloy round core and some aluminum alloy heat sinks; The center of described every fin all has and the onesize circle center hole of circle core diameter, and the periphery of circle center hole has the fin flange, and the fin flange is welded on the round core by the high temperature soldering; Between per two fin, be fixed with some fulcrums; It is characterized in that: on every fin, the both sides up and down that are positioned at circle center hole have some ventilation holes, and after the assembling of some fin, the position of staggering mutually of the ventilation hole on adjacent two fin is to constitute Turbulent Flow Type vent passages on the radiator.
In order to strengthen the axial ventilation ability of groups of fins, be positioned at every fin on the left and right sides of circle center hole.Respectively have an axial ventilation hole of parallel axes with the circle core.
Every fin of the present invention is square, in order to produce the wind-force swirling action at four angles of radiator, improve radiating effect, the hot-air between the fin is distributed, adopt circular arc to carry out corner cut at four angles of every fin and make it to become the circular arc corner cut.
As a kind of aluminium-alloy high-power semi-conductor device of the second aspect present invention preparation method with radiator, it comprises the steps:
1, select for use aluminium alloy sheet punch forming up to specification to form the fin of all size of groups of fins;
2, aluminium alloy bar truck is made the round core that meets dimensional requirement;
3, on each fin and circle wicking surface copper facing or zinc-plated processing;
4, the fin that will electroplate good different size is enclosed within on the round core and staggered successively being superimposed as requested successively;
5, adopt the high temperature soldering that some fin and circle core are welded into groups of fins;
6, to the groups of fins surface oxidation treatment.
All fin of the present invention and circle core all adopt high-quality, light weight, aluminum alloy materials that radiating condition is good to make, simultaneously on groups of fins, particular design some Turbulent Flow Type vent passages, so just can fully ventilate by laminar flow the raising radiating effect.In addition, also design axial ventilation hole on the groups of fins, more strengthened axial ventilation and heat ability, and four angles of some fin are the circular arc corner cut, the wind-force swirling action is just played at such four angles, and the hot-air between the fin is distributed, and has improved radiating effect.
The present invention has not only alleviated the weight of radiator owing to used aluminum alloy thin sheet material and bar, has also reduced the cost of radiator.
Description of drawings:
Further specify the present invention below in conjunction with the drawings and specific embodiments.
Fig. 1 is the structure chart of facing of the present invention.
Fig. 2 is left TV structure figure of the present invention.
Fig. 3 is the A-A cutaway view of Fig. 1.
Fig. 4 is the B-B cutaway view of Fig. 1.
Fig. 5 is the planar structure schematic diagram of first fin described in the specific embodiment of the invention.
Fig. 6 is the A-A cutaway view of Fig. 5.
Fig. 7 is the planar structure schematic diagram of second fin described in the specific embodiment of the invention.
Fig. 8 is the A-A cutaway view of Fig. 7.
Fig. 9 is the planar structure schematic diagram of the 3rd fin described in the specific embodiment of the invention.
Figure 10 is the A-A cutaway view of Fig. 9.
Figure 11 is the scatter planar structure schematic diagram of backing of the described in the specific embodiment of the invention.
Figure 12 is the A-A cutaway view of Figure 11.
Figure 13 is the planar structure schematic diagram of the 5th fin described in the specific embodiment of the invention.
Figure 14 is the A-A cutaway view of Figure 13.
Figure 15 is the planar structure schematic diagram of the 6th fin described in the specific embodiment of the invention.
Figure 16 is the A-A cutaway view of Figure 15.
Figure 17 is the planar structure schematic diagram of the intermediate plate described in the specific embodiment of the invention.
Figure 18 is 17 A-A cutaway view.
Embodiment:
Further specify the present invention below in conjunction with the drawings and specific embodiments.
A kind of aluminium-alloy high-power semi-conductor device radiator comprises the groups of fins 1 of the two groups of multi-discs assembling that is installed in brake tube housing both sides, and brake tube outwards dispels the heat from the groups of fins 1 on housing both sides.
Referring to Fig. 1 and Fig. 2, groups of fins 1 is made up of circle core 11 and some fin; Circle core 11 adopts Φ 110 aluminium alloy bars finish turnings to Φ 108mm, and copper coating or zinc-plated processing are standby.
Some fin are stamped to form with aluminium alloy sheet according to its design specification with 0.8-1.0mm, and copper facing of punch forming rear surface or zinc-plated processing are standby.Intermediate plate 10 adopts the thick aluminum alloy plate materials punching molding of 2mm to form copper coating or zinc-plated processing
Be enclosed within fin, the intermediate plate 18 of electroplating good different size on the round core 11 as requested successively and staggered successively being superimposed, adopt the high temperature soldering that some fin and circle core 11 are welded into groups of fins; Welding is spent scolding tin with 60, and welding temperature is 250～300 degrees centigrade, behind the welding fabrication, to the groups of fins surface oxidation treatment.
Concrete assembling mode is as follows:
Referring to Fig. 2, Fig. 3, Fig. 4, some fin comprise first fin 12 in radiator left side, second fin 13 on the radiator right side, seven the 3rd fin 14 between first fin 12 and second fin 13 and seven pieces the scatter backing 15, three the 5th fin 16 and three the 6th fin 17 and five intermediate plates 18.
Referring to Fig. 5 and Fig. 6, first fin 12 is a square, the center has and the onesize Φ 108mm circle center hole 121 of circle core 11 diameters, the peripheral oriented fin 12 positive outstanding fin flange 122 of circle center hole 121, the height of fin flange 122 is 2.8mm, and 12 4 angles of first fin are adopted circular arc to carry out corner cut and made it to become circular arc corner cut 123; The left and right sides that is positioned at circle center hole 121 has the axial ventilation hole 124 of two Φ 20mm; Circle center hole on the plate face of first fin 12 about in the of 121 the both sides punching out have six to the outstanding fulcrums 125 of fin 12 reverse side, six fulcrums 125 are divided into two parts up and down, be arranged on the periphery of fin 12 upper and lower plates faces, the thickness of fulcrum 125 is sheet metal thickness, highly be 2.8mm, width is 6mm, and the Width of its central bearing point 125 extends along the laminar flow direction; Behind six fulcrum 125 punch formings, form the fulcrum hole 126 of six 6 * 2.5mm on the plate face of first fin 12, these six fulcrum holes 126 are exactly the ventilation hole that plays draught effect.
Referring to Fig. 7 and Fig. 8, second fin 13 is the square identical with first fin 12, the center has and the onesize Φ 108mm circle center hole 131 of circle core 11 diameters, the peripheral oriented fin 13 positive outstanding fin flange 132 of circle center hole 131, the height of fin flange 132 is 2.8mm, and 13 4 angles of first fin are adopted circular arc to carry out corner cut and made it to become circular arc corner cut 133; The left and right sides that is positioned at circle center hole 131 has the axial ventilation hole 134 of two Φ 20mm; The circle center hole of the plate face of first fin 13 about in the of 131 the both sides punching out fulcrum hole 136 of six 6 * 2.3mm is arranged, six fulcrum holes 136 are divided into two parts up and down, be arranged on the periphery of fin 12 upper and lower plates faces, these six fulcrum holes 136 just play the ventilation hole of draught effect.
The shape of six fulcrum holes 126 on six fulcrum holes 136 on second fin 13 and first fin 12 is identical, the 10mm but stagger in the position.The axial ventilation hole 134 of two Φ 20mm is also identical with the position of two axial ventilation holes 124 on first fin 12, and circular arc corner cut 123 shapes on 12 4 angles of the circular arc corner cut 133 and first fin on four angles are identical with the position.
Referring to Fig. 9 and Figure 10, the 3rd fin 14 is the square identical with first fin 12, the center has and the onesize Φ 108mm circle center hole 141 of circle core 11 diameters, the peripheral oriented fin 14 positive outstanding fin flange 142 of circle center hole 141, the height of fin flange 142 is 2.8mm, and 14 4 angles of the 3rd fin are adopted circular arc to carry out corner cut and made it to become circular arc corner cut 143; The left and right sides that is positioned at circle center hole 141 has the ventilation hole 144 of two Φ 20; The circle center hole of the plate face of the 3rd fin 14 about in the of 141 the both sides punching out have six to the outstanding fulcrums 145 of fin 14 reverse side, six fulcrums 145 are divided into two parts up and down, be arranged on the periphery of fin 14 upper and lower plates faces, the thickness of fulcrum 145 is sheet metal thickness, highly be 2.8mm, width is 6mm, and the Width of its central bearing point 145 extends along the laminar flow direction; Behind six fulcrum 145 punch formings, form the fulcrum hole 146 of six 6 * 2.3mm on the plate face of the 3rd fin 14, these six fulcrum holes 146 also can play the ventilation hole of draught effect.The position and the shape of six fulcrum holes 126 on six fulcrum holes 146 on the 3rd fin 14 and first fin 12 are all identical.The position of two axial ventilation holes 124 on the ventilation hole 144 of two Φ 20mm and first fin 12 is identical, and circular arc corner cut 123 shapes on 12 4 angles of the circular arc corner cut 143 and first fin on four angles are identical with the position.
Referring to Figure 11 and Figure 12, the backing 15 that scatters is the square identical with first fin 12, the center has and the onesize Φ 108mm circle center hole 151 of circle core 11 diameters, the peripheral oriented fin 15 positive outstanding fin flange 152 of circle center hole 151, the height of fin flange 152 is 2.8mm, and the 15 4 angles of backing that scatter adopt circular arc to carry out corner cut to make it to become circular arc corner cut 153; The left and right sides that is positioned at circle center hole 151 has the ventilation hole 154 of two Φ 20mm; The scatter the circle center hole of plate face of backing 15 about in the of 151 the both sides punching out have six to the outstanding fulcrums 155 of fin 15 reverse side, six fulcrums 155 are divided into two parts up and down, be arranged on the periphery of fin 15 upper and lower plates faces, the thickness of fulcrum 155 is sheet metal thickness, highly be 2.8mm, width is 6mm, and the Width of its central bearing point 155 extends along the laminar flow direction; Behind six fulcrum 155 punch formings, form the fulcrum hole 156 of six 6 * 2.3mm on the plate face of the 3rd fin 15, these six fulcrum holes 156 just can play the ventilation hole of draught effect.The shape of six fulcrum holes 126 on six fulcrum holes 156 and first fin 12 that scatters on the backing 15 is identical, the 10mm but stagger in the position.The axial ventilation hole 154 of two Φ 20mm is also identical with the position of two axial ventilation holes 124 on first fin 12, and circular arc corner cut 123 shapes on 12 4 angles of the circular arc corner cut 153 and first fin on four angles are identical with the position.
Referring to Figure 13 and Figure 14, the 5th fin 16 is made of square identical with first fin 12 and the long limit 167 that is positioned at the square upper left corner, adopts same aluminum alloy thin punch forming.Also have the installing hole 168 of two Φ 13mm on the top on long limit 167; Tetragonal center has and the onesize Φ 108mm circle center hole 161 of circle core 11 diameters, the peripheral oriented fin 16 positive outstanding fin flange 162 of circle center hole 161, the height of fin flange 162 is 2.8mm, and four angles of the 5th fin 16 squares are adopted circular arc to carry out corner cut and made it to become circular arc corner cut 163; The left and right sides that is positioned at circle center hole 161 has the ventilation hole 164 of two Φ 20mm; The circle center hole of the plate face of the 5th fin 16 about in the of 161 the both sides punching out have six to the outstanding fulcrums 165 of fin 16 reverse side, six points 165 are divided into two parts up and down, be arranged on the periphery of fin 16 square upper and lower plates faces, the thickness of fulcrum 165 is sheet metal thickness, highly be 2.8mm, width is 6mm, and the Width of its central bearing point 165 extends along the laminar flow direction; Behind six fulcrum 165 punch formings, form the fulcrum hole 166 of six 6 * 2.5mm on the tetragonal plate face of the 5th fin 16, these six fulcrum holes 166 just can play the ventilation hole of draught effect.The shape of six fulcrum holes 126 on six fulcrum holes 166 on the 5th fin 16 and first fin 12 is identical, the 10mm but stagger in the position.The position of two ventilation holes 124 on the ventilation hole 164 of two Φ 20mm and first fin 12 is identical, and circular arc corner cut 123 shapes on 12 4 angles of the circular arc corner cut 163 and first fin on four angles are identical with the position.
Referring to Figure 15 and Figure 16, the 6th fin 17 is made of square identical with first fin 12 and the long limit 177 that is positioned at the square upper left corner, adopts same aluminium alloy plate punch forming.Also have the installing hole 178 of two Φ 13mm on the top on long limit 177.Two installing hole 168 position consistency on installing hole 178 and the 5th fin 16.Tetragonal center has and the onesize Φ 180mm circle center hole 171 of circle core 11 diameters, the peripheral oriented fin 17 positive outstanding fin flange 172 of circle center hole 171, the height of fin flange 172 is 2.8rnm, and four angles of the 5th fin 17 squares are adopted circular arc to carry out corner cut and made it to become circular arc corner cut 173; The left and right sides that is positioned at circle center hole 171 has the ventilation hole 174 of two Φ 20mm; Plate face upper punch at the 5th fin 17 is shaped on six to the outstanding fulcrum 175 of fin 17 reverse side, six fulcrums 175 are divided into two parts up and down, be arranged on the periphery of fin 17 square upper and lower plates faces, the thickness of fulcrum 175 is sheet metal thickness, highly be 2.8mm, width is 6mm, and the Width of its central bearing point 175 extends along the laminar flow direction; Behind six fulcrum 175 punch formings, form the fulcrum hole 176 of six 6 * 2.3mm on the tetragonal plate face of the 6th fin 17, these six fulcrum holes 176 can play draught effect.The shape of six fulcrum holes 126 on six fulcrum holes 176 on the 6th fin 17 and first fin 12 is identical, the 10mm but stagger in the position.The position is to lopsidedness 10mm.The ventilation hole 174 of two Φ 20mm is also identical with the position of two ventilation holes 124 on first fin 12, and circular arc corner cut 123 shapes on 12 4 angles of the circular arc corner cut 173 and first fin on four angles are identical with the position.The width of minor face 167 equates that two corners employing R2 transition on its top is not to hinder hand when being installed in radiator on the width on long limit 177 and the 5th fin 16.
Referring to Figure 17 and Figure 18, intermediate plate 18 is a square, and the width on long limit 167 equates that its thickness is 2mm on its width and the 5th fin 16.The top of intermediate plate 18 have with the 6th fin 17 on long limit 177 on identical Φ 13 installing holes 188 in installing hole 178 positions.
Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, during groups of fins 1 assembling, first fin 12, one are enclosed within on the round core 11 at scatter backing 15, three the 5th fin 16 and three the 6th fin 17 of second fin 13 in radiator left side, seven the 3rd fin 14 between first fin 12 and second fin 13 and seven pieces the, position relation between them is: first fin 12 is positioned at the leftmost side of groups of fins 1, fin flange 122 on it is towards a left side, and fulcrum 125 is towards the right side; Be inserted in fin flange 142 on one the 3rd fin, 14, the three fin 14 towards a left side from the right side of circle core 11 then, fulcrum 145 is towards the right side; Be inserted in one backing 15, that scatters again and scatter fin flange 152 on the backing 15 towards a left side, fulcrum 155 is towards the right side.
After alternately being inserted in three the 3rd fin 14 and two backings 15 that scatter so successively again, be inserted in fin flange 172 on one the 6th fin, 17, the six fin 17 again towards a left side, fulcrum 175 is towards the right side; Be inserted in fin flange 162 on one the 5th fin, 16, the five fin 16 again towards a left side, fulcrum 165 is towards the right side.
After alternately being inserted in two the 6th fin 17 and two the 5th fin 16 so successively again, being inserted in one backing 15, that scatters again and scattering fin flange 152 on the backing 15 towards a left side, fulcrum 155 is towards the right side; Be inserted in fin flange 142 on one the 3rd fin, 14, the three fin 14 again towards a left side, fulcrum 145 is towards the right side.
After alternately being inserted in three scatter backing 15 and two the 3rd fin 14 so successively again, be inserted in fin flange 132 on second fin, 13, the second fin 13 at last towards a left side.
All fin 12,13,14,15,16,17 usefulness high temperature solderings (220～300 ℃) weld together with circle core 11, and evenly welding mutually.
Inserting intermediate plate 18 usefulness high temperature solderings (220～300 ℃) then between three the 5th fin 16 and the 6th fin 17 welds together.
Entire heat dissipation sheet group 1 polishing and surface oxidation treatment with anti-oxidation, influences heat-sinking capability.Ventilation hole on the adjacent two fin position of staggering mutually is to constitute Turbulent Flow Type vent passages on the radiator.
After assembling, the ventilation hole 124,144,164 on the fin 12,14,16, all coincidences, four circular arc corner cuts 123,143,163 also all overlap, and six fulcrum holes 126,146,166 also overlap respectively.Ventilation hole on the fin 13,15,17 is compared the 10mm position of then staggering mutually with the ventilation hole on the fin 12,14,16, and the air that enters forms turbulent flow, with abundant crystals cooled pipe; Ventilation hole 134,154,174 on the fin 13,15,17, all coincidences, four circular arc corner cuts 133,153,173 also all overlap, and six fulcrum holes 126,146,166 also overlap respectively.Two installing holes 178 on the fin 17 overlap with two installing holes 188 on the intermediate plate 18.
After assembling, thermal resistance RSA of the present invention≤0.054 (6 meter per second wind speed).Misplacing mutually mainly due to adjacent fin ventilation hole, is that the wind that enters forms turbulent flow, and system is fully cooled off, and improves radiating effect.
Certainly,, do not spend performing creative labour, on the basis of the foregoing description, can do multiple variation, can realize purpose of the present invention equally for one of ordinary skill in the art.But this variation obviously should be in the protection range of claims of the present invention.
Claims (4)
1, a kind of large power semiconductor device radiator comprises the groups of fins of the two groups of multi-discs assembling that is installed in brake tube housing both sides, and brake tube outwards dispels the heat from the groups of fins on housing both sides, and described groups of fins is made up of aluminum alloy round core and some aluminum alloy heat sinks; The center of described every fin all has and the onesize circle center hole of circle core diameter, and the periphery of circle center hole has the fin flange, and the fin flange is welded on the round core by the high temperature soldering; Between per two fin, be fixed with some fulcrums; It is characterized in that: on every fin, the both sides up and down that are positioned at circle center hole have some ventilation holes, and after the assembling of some fin, the position of staggering mutually of the ventilation hole on adjacent two fin is to constitute Turbulent Flow Type vent passages on the radiator.
2, a kind of large power semiconductor device radiator according to claim 1 is characterized in that, is positioned at every fin to have an axial ventilation hole with the parallel axes of circle core on the left and right sides of circle center hole.
3, a kind of large power semiconductor device radiator according to claim 1 is characterized in that, every fin of the present invention is square, adopts circular arc to carry out corner cut at four angles of every fin and makes it to become the circular arc corner cut.
4, a kind of aluminium-alloy high-power semi-conductor device is characterized in that with the preparation method of radiator it comprises the steps:
1), select for use aluminium alloy sheet punch forming up to specification to form the fin of all size of groups of fins;
2), aluminium alloy bar truck is made the round core that meets dimensional requirement;
3), on each fin and circle wicking surface copper facing or zinc-plated processing;
4), the fin that will electroplate good different size is enclosed within on the round core and staggered successively being superimposed as requested successively;
5), adopt the high temperature soldering that some fin and circle core are welded into groups of fins;
6), to the groups of fins surface oxidation treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100272891A CN100490133C (en) | 2006-06-05 | 2006-06-05 | Aluminium-alloy high-power semi-conductor radiator and preparing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100272891A CN100490133C (en) | 2006-06-05 | 2006-06-05 | Aluminium-alloy high-power semi-conductor radiator and preparing method |
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| Publication Number | Publication Date |
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| CN1851909A true CN1851909A (en) | 2006-10-25 |
| CN100490133C CN100490133C (en) | 2009-05-20 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102017825A (en) * | 2008-05-02 | 2011-04-13 | 丹福斯矽电有限责任公司 | Cooling device for a plurality of power modules |
| CN103153031A (en) * | 2013-03-15 | 2013-06-12 | 宗鸿电子科技（昆山）有限公司 | Heat radiating device for car audio |
| CN108243598A (en) * | 2018-02-02 | 2018-07-03 | 武汉天马微电子有限公司 | Shell, preparation method and the electronic equipment of a kind of electronic equipment |
| CN108323114A (en) * | 2018-02-14 | 2018-07-24 | 北京比特大陆科技有限公司 | Circuit board with effect of symmetrical heat radiation structure and computing device |
| CN110269283A (en) * | 2019-07-29 | 2019-09-24 | 深圳小辣椒科技有限责任公司 | It is a kind of to heat the electronic cigarette that do not burn |
-
2006
- 2006-06-05 CN CNB2006100272891A patent/CN100490133C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102017825A (en) * | 2008-05-02 | 2011-04-13 | 丹福斯矽电有限责任公司 | Cooling device for a plurality of power modules |
| CN102017825B (en) * | 2008-05-02 | 2013-09-04 | 丹福斯矽电有限责任公司 | Cooling device for a plurality of power modules |
| CN103153031A (en) * | 2013-03-15 | 2013-06-12 | 宗鸿电子科技（昆山）有限公司 | Heat radiating device for car audio |
| CN108243598A (en) * | 2018-02-02 | 2018-07-03 | 武汉天马微电子有限公司 | Shell, preparation method and the electronic equipment of a kind of electronic equipment |
| CN108323114A (en) * | 2018-02-14 | 2018-07-24 | 北京比特大陆科技有限公司 | Circuit board with effect of symmetrical heat radiation structure and computing device |
| CN110269283A (en) * | 2019-07-29 | 2019-09-24 | 深圳小辣椒科技有限责任公司 | It is a kind of to heat the electronic cigarette that do not burn |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100490133C (en) | 2009-05-20 |
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Granted publication date: 20090520 Termination date: 20130605 |