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CN108010893A - Minitype radiator and its manufacture method based on lotus leaf microcosmic surface - Google Patents

Minitype radiator and its manufacture method based on lotus leaf microcosmic surface Download PDF

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Publication number
CN108010893A
CN108010893A CN201810007121.7A CN201810007121A CN108010893A CN 108010893 A CN108010893 A CN 108010893A CN 201810007121 A CN201810007121 A CN 201810007121A CN 108010893 A CN108010893 A CN 108010893A
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CN
China
Prior art keywords
heat
lotus leaf
heat sink
dissipating frame
minitype radiator
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.)
Pending
Application number
CN201810007121.7A
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Chinese (zh)
Inventor
周建阳
杨祖江
潘宇晨
钟家勤
薛斌
吴宇
范承广
张培
黄乾添
覃泽宇
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Qinzhou University
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Qinzhou University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Qinzhou University filed Critical Qinzhou University
Priority to CN201810007121.7A priority Critical patent/CN108010893A/en
Publication of CN108010893A publication Critical patent/CN108010893A/en
Pending legal-status Critical Current

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00Details of semiconductor or other solid state devices
    • H01L23/34Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/36Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
    • H01L23/367Cooling facilitated by shape of device
    • H01L23/3672Foil-like cooling fins or heat sinks
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00Details of semiconductor or other solid state devices
    • H01L23/34Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/36Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
    • H01L23/367Cooling facilitated by shape of device
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00Details of semiconductor or other solid state devices
    • H01L23/34Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/36Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
    • H01L23/373Cooling facilitated by selection of materials for the device or materials for thermal expansion adaptation, e.g. carbon
    • H01L23/3736Metallic materials
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00Details of semiconductor or other solid state devices
    • H01L23/34Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/46Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids
    • H01L23/467Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids by flowing gases, e.g. air

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

The present invention disclose a kind of minitype radiator and its manufacture method based on lotus leaf microcosmic surface, the heat sink of lotus leaf surface microstructure microelectronics radiator is prepared using 3D printing technique, can effective one-pass molding, especially closing space shaping complexity micro-structure.The fin surface manufactured by this method has the stronger coefficient of heat transfer, realizes that the heat sink prepared compared with classical production process has stronger heat exchange property.Manufacture method is simple, is suitable for the production of bionic surface structure product, according to the requirement of patent, first has to the microstructure data using Reverse Engineering Technology extraction lotus leaf surface, the data extracted is carried out three-dimensional modeling, input 3D printer carries out finished product printing.According to lotus leaf microscale surface features, lotus leaf appearance shape is designed on minitype radiator heat sink, adds radiating efficiency on unit heat dissipation area, there is obvious humidification to the heat dissipation performance of heat sink.

Description

Minitype radiator and its manufacture method based on lotus leaf microcosmic surface
Technical field
The present invention relates to heat transfer enhancement technology field, and in particular to a kind of minitype radiator based on lotus leaf microcosmic surface and Its manufacture method.
Background technology
At present, electronics industry rapid development so that PCB circuit board on integrated component highly dense, complex circuit Change, packaging density centralization, and then increase the heat flow density of the element in PCB circuit board, temperature rises.In addition, PCB circuits The scantling and shape of element on plate constantly reduce, and also make the increase of its temperature even more serious.Particularly in PCB circuit board CPU processor, its temperature can be with the continuous rise of the calculating speed of its handled data, heat release increases, if CPU processor exists The heat produced in work cannot solve, and can not only allow the speed of service of CPU processor to become slow, but also can accelerate old Change, can also CPU is failed when situation is serious, What is more can burn chip.Therefore the design of cpu heat just seems with manufacture It is particularly important that.And with the continuous renewal of technology, common cpu heat is not enough to solve CPU heat dissipation problems now, so It is urgent problem now to design new cpu heat or existing cpu heat is optimized.
At present, the reinforcing in the world to enhanced heat exchange surface is prepared growing, and many researchers study various one after another Physics and chemistry manufacture, and such as photoetching process, interferometric method, fold method and electrical spinning method change original smooth surface.But these In method there is stress variation involved in manufacturing process, being aligned of mould, standby maintenance expense is high the shortcomings of, and there are a pass The factor of key is the requirement that required precision cannot reach biological surface microstructure, when preparing biological microcosmic surface, to biology The size class on surface is high, and microscopic surface texture is prepared bionical there are reasons such as irregular shapes with these traditional methods Surface.The feature of biosurface structure is not embodied preferably, thus, prepared product cannot show bionical well Function.
The content of the invention
The present invention provides a kind of minitype radiator and its manufacture method based on lotus leaf microcosmic surface, it can not only increase scattered The heat transfer area of hot device, reaches the effect of augmentation of heat transfer, and can reduce the volume and manufacture cost of radiator.
To solve the above problems, the present invention is achieved by the following technical solutions:
Based on the minitype radiator of lotus leaf microcosmic surface, including heat-dissipating frame and be arranged in heat-dissipating frame more than 2 Heat sink;Above-mentioned heat-dissipating frame is hollow rectangular cavities, opens on front and rear 2 opposite flanks of its heat-dissipating frame and sets respectively There is heat emission hole;All heat sinks are vertically arranged in the internal cavities of heat-dissipating frame;These heat sinks are spaced and parallel Set;Gap between every 2 heat sinks forms heat exchanger channels, and the both ends of the heat exchanger channels are communicated with heat emission hole respectively, exchanges heat Medium is flowed into from the side heat emission hole of heat-dissipating frame, and after flowing through the heat exchanger channels between 2 heat sinks, from the another of heat-dissipating frame Side heat emission hole outflow;Every heat sink is sheet, several convex columnar heat radiation points are provided with the surface of heat sink, And these heat radiation points are in aligned transfer on the surface of heat sink.
In such scheme, heat transferring medium is air.
In such scheme, heat radiation point is cylinder.
In such scheme, all heat radiation points arrange on the surface of heat sink in regular matrix.
In such scheme, heat-dissipating frame, heat sink and heat radiation point are made by albronze.
The manufacture method of minitype radiator based on lotus leaf microcosmic surface, includes the manufacture of heat sink, the heat sink It is as follows that manufacture specifically includes step:
Step 1, with reverse engineering software to lotus leaf microcosmic surface carry out 3-D scanning handle, therefrom extract lotus leaf The characteristic point cloud of microscopic surface texture;
The characteristic point cloud of the lotus leaf microscopic surface texture extracted, is embedded into given design space coordinate by step 2 In, obtain vector parameter set;
Step 3, from vector parameter set randomly select indicatrix to build bionic curved surface;
Step 4, carry out slickness, continuity and error-detecting to bionic curved surface;When the testing result of bionic curved surface meets It is required that when, then create heat sink threedimensional model;Otherwise, return to step 3;
Step 5, import the threedimensional model for creating heat sink in 3D printer system, and generates the stl file of heat sink;
Step 6, generate control print parameters according to the stl file of heat sink, and completes to be based on lotus leaf microcosmic surface accordingly Minitype radiator heat sink printing.
Compared with prior art, the bionical air-cooled minitype radiator of the invention based on lotus leaf microcosmic surface, according to lotus leaf Microscale surface features, lotus leaf appearance shape is designed on minitype radiator heat sink, this bionical microcosmic compared to smooth surface Surface texture increases heat dissipation area 25%-50%, radiating efficiency on unit heat dissipation area is added, to the heat dissipation performance of heat sink With obvious humidification, this bionical air-cooled minitype radiator based on lotus leaf microcosmic surface can be widely used for microelectronics The fields such as chip, high-capacity LED.In addition, the present invention is based on bionics principle, by bionics principle, pass through reverse work Journey technology applies to nature animals and plants microscopic surface texture on minitype radiator, and lotus leaf table is prepared using 3D printing technique The heat sink of face microstructure microelectronics radiator, can effective one-pass molding, especially in the complicated small knot of the space of closing shaping Structure.The fin surface manufactured by this method has the stronger coefficient of heat transfer, realizes and is dissipated compared with prepared by classical production process Backing has stronger heat exchange property.Manufacture method is simple, is suitable for the production of bionic surface structure product, according to wanting for patent Ask, first have to the microstructure data using Reverse Engineering Technology extraction lotus leaf surface, the data extracted are carried out three-dimensional Modeling, preserves STL forms, inputs 3D printer, carries out finished product printing.
Brief description of the drawings
Fig. 1 is the dimensional structure diagram of the minitype radiator based on lotus leaf microcosmic surface.
Fig. 2 is the main view enlarged drawing of heat sink.
Fig. 3 is the left view enlarged drawing of heat sink.
Fig. 4 is the manufacture method flow chart of the minitype radiator based on lotus leaf microcosmic surface.
Figure label:1st, heat-dissipating frame;2nd, heat sink;3rd, heat radiation point;4、CPU
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with instantiation, and with reference to attached Figure, the present invention is described in more detail.It should be noted that the direction term mentioned in example, such as " on ", " under ", " in ", " left side " " right side ", "front", "rear" etc., be only refer to the attached drawing direction.Therefore, the direction used is intended merely to explanation For limiting the scope of the invention.
A kind of minitype radiator based on lotus leaf microcosmic surface, as shown in Figs. 1-3, including heat-dissipating frame 1 and be arranged on it is scattered The heat sink 2 of more than 2 in hot frame 1.
Above-mentioned heat-dissipating frame 1 is hollow rectangular cavities, its overall dimension is 51mm × 50mm × 15mm.The heat-dissipating frame Opened on 1 front and rear 2 opposite flanks and be respectively equipped with heat emission hole.The inside that all heat sinks 2 are vertically arranged in heat-dissipating frame 1 is empty In chamber.These heat sinks 2 are spaced and are arranged in parallel.Gap between every 2 heat sinks 2 forms heat exchanger channels, the heat exchange The both ends of passage are communicated with heat emission hole respectively, and heat transferring medium is flowed into from the side heat emission hole of heat-dissipating frame 1, and flows through 2 heat dissipations After heat exchanger channels between piece 2, flowed out from the opposite side heat emission hole of heat-dissipating frame 1.In the present invention, heat transferring medium is according to reality Application environment is selected, and such as can be refrigerant or air, in a preferred embodiment of the invention, the selected heat exchange changed is situated between Matter is air.
Every heat sink 2 is sheet.The heat sink 2 is that have imitative lotus leaf microscale surface features, the i.e. table of heat sink 2 Several convex columnar heat radiation points 3 are provided with face, these heat radiation points 3 can be prism-shaped, or cylindric.At this In invention preferred embodiment, all heat radiation points 3 are cylinder, its a diameter of 1mm, a height of 1mm.With on a piece of heat sink 2 All heat radiation points 3 are in aligned transfer on the surface of heat sink 2.In order to preferably drain and radiate, in the preferred embodiment of the present invention In, all heat radiation points 3 arrange on the surface of heat sink 2 in regular matrix, and line-spacing and 2 row heat radiation points between 2 row heat radiation points 3 Row between 3 are 1mm away from equal.
In the present invention, heat-dissipating frame 1, heat sink 2 and heat radiation point 3 are made from a material that be thermally conductive.It is preferable to carry out in the present invention In example, heat-dissipating frame 1, heat sink 2 and heat radiation point 3 are made by albronze, it is with enough hardness, cheap, weight The advantages that amount is gently and heat conductivility is good.
The present invention is applied in air-cooled CPU4 radiators, in use, CPU4 to be arranged on to the upper surface of heat-dissipating frame 1. When CPU4 works, substantial amounts of heat is produced with the continuous improvement of arithmetic speed, passes through the bottom of air-cooled CPU4 radiators Face contacts with CPU4 and conducts heat on bottom surface, then is contacted by bottom surface with imitative lotus leaf microcosmic surface fan-cooled radiator heat sink 2 Heat transfer, the heat being transmitted to by bottom surface on heat sink 2 by exchanging heat again by the heat exchanger channels wall of heat sink 2, being finally situated between again Mass flow is moved, and heat is seen off.And based on imitative lotus leaf microscopic surface texture design, compared to smooth surface, this bionical microcosmic surface Structure increases heat dissipation area 25%-50%, adds radiating efficiency on unit heat dissipation area.The imitative lotus leaf microcosmic surface of the present invention Air-cooled CPU4 radiator fins 2 are made by albronze, possess enough hardness, cheap, light-weight, thermal conductivity Can be also not poor, there is provided economical and practical raw material, improve practicality.
Required in view of the size of the lotus leaf surface microstructure in 1mm.It is and same in lotus leaf surface microstructure The anisotropy requirement large scale cylinder meets the hydrophobicity of lotus leaf surface in high 1mm or so, wide 1mm or so, its structure. In order to reach this required precision, and the heat sink 2 that preferably imitative lotus leaf surface is microcosmic is prepared with this realize, enhancing is micro- The heat exchange property of electronic heat sink, the present invention devise a kind of manufacture method of the minitype radiator based on lotus leaf microcosmic surface, Include the manufacture of heat sink 2, as shown in figure 4, to specifically include step as follows for the manufacture of its heat sink 2:
Step 1, with reverse engineering software to lotus leaf microcosmic surface carry out 3-D scanning handle, therefrom extract lotus leaf The characteristic point cloud of microscopic surface texture;
The characteristic point cloud of the lotus leaf microscopic surface texture extracted, is embedded into given design space coordinate by step 2 In, obtain vector parameter set;
Step 3, from vector parameter set randomly select indicatrix to build bionic curved surface;
Step 4, carry out slickness, continuity and error-detecting to bionic curved surface;When the testing result of bionic curved surface meets It is required that when, then create heat sink 2 threedimensional model;Otherwise, return to step 3;
Step 5, by create heat sink 2 threedimensional model import 3D printer system in, and generate heat sink 2 STL text Part;
Step 6, generate control print parameters according to the stl file of heat sink 2, and completes to be based on lotus leaf microcosmic surface accordingly The heat sink 2 of minitype radiator print.
2 model of heat sink for a kind of lotus leaf surface structure microelectronics radiator established before manufacture, the surface of the model Data it is identical with the lotus leaf surface data that extraction acquires, which is preserved and is saved in into STL forms and is input to 3D printing In machine, designed parameter value should reach the manufacture method required precision.After importing model, the parameter that need to be printed Value, is 0.2mm by the precision setting of printing, and then heat sink 2 carries out slicing treatment, sets level filling rate, the support of printing Frame, floor height etc., the speed and temperature of nozzle will also be carried out afterwards by completing these.The design of these parameters influences whether shaping matter Amount, is even more important for the surface quality of heat sink 2.3D printing can prepare the heat sink of radiator using PLA as raw material 2。
Contrast verification surface, by measuring instrument after amplification, whether the surface quality for contrasting finished product meets what is designed at first Data, if do not met, it is necessary to readjusting parameter carries out printing verification, also need to contact water droplet on its surface after structure verification Whether angle size and wetability are with being tested as lotus leaf surface, the final heat sink 2 for obtaining biomimetic features.
It should be noted that although embodiment of the present invention is illustrative above, but it is to the present invention that this, which is not, Limitation, therefore the invention is not limited in above-mentioned embodiment.Without departing from the principles of the present invention, it is every The other embodiment that those skilled in the art obtain under the enlightenment of the present invention, is accordingly to be regarded as within the protection of the present invention.

Claims (6)

1. based on the minitype radiator of lotus leaf microcosmic surface, it is characterized in that, including heat-dissipating frame (1) and it is arranged on heat-dissipating frame (1) heat sink (2) of more than 2 in;
Above-mentioned heat-dissipating frame (1) is hollow rectangular cavities, and difference is opened on front and rear 2 opposite flanks of its heat-dissipating frame (1) Equipped with heat emission hole;All heat sinks (2) are vertically arranged in the internal cavities of heat-dissipating frame (1);These heat sinks (2) are mutual Spaced, parallel is set;Gap between every 2 heat sinks (2) forms heat exchanger channels, and the both ends of the heat exchanger channels are respectively with dissipating Hot hole communicates, and heat transferring medium is flowed into from the side heat emission hole of heat-dissipating frame (1), and the heat exchange flowed through between 2 heat sinks (2) is led to Behind road, flowed out from the opposite side heat emission hole of heat-dissipating frame (1);
Every heat sink (2) is sheet, several convex columnar heat radiation points (3) are provided with the surface of heat sink (2), and These heat radiation points (3) are in aligned transfer on the surface of heat sink (2).
2. the minitype radiator according to claim 1 based on lotus leaf microcosmic surface, it is characterized in that, heat transferring medium is sky Gas.
3. the minitype radiator according to claim 1 based on lotus leaf microcosmic surface, it is characterized in that, heat radiation point (3) is circle Cylindricality.
4. the minitype radiator according to claim 1 based on lotus leaf microcosmic surface, it is characterized in that, all heat radiation points (3) Arranged on the surface of heat sink (2) in regular matrix.
5. the minitype radiator according to claim 1 based on lotus leaf microcosmic surface, it is characterized in that, heat-dissipating frame (1), dissipate Backing (2) and heat radiation point (3) are made by albronze.
6. the manufacture method of the minitype radiator based on lotus leaf microcosmic surface described in claim 1, includes the system of heat sink (2) Make, it is characterised in that:It is as follows that the manufacture of the heat sink (2) specifically includes step:
Step 1, with reverse engineering software to lotus leaf microcosmic surface carry out 3-D scanning handle, therefrom extract lotus leaf it is microcosmic The characteristic point cloud of surface texture;
The characteristic point cloud of the lotus leaf microscopic surface texture extracted, be embedded into given design space coordinate by step 2, obtains To vector parameter set;
Step 3, from vector parameter set randomly select indicatrix to build bionic curved surface;
Step 4, carry out slickness, continuity and error-detecting to bionic curved surface;When the testing result of bionic curved surface meets the requirements When, then create heat sink (2) threedimensional model;Otherwise, return to step 3;
Step 5, will create heat sink (2) threedimensional model import 3D printer system in, and generate heat sink (2) STL text Part;
Step 6, generate control print parameters according to the stl file of heat sink (2), and completes accordingly based on lotus leaf microcosmic surface Heat sink (2) printing of minitype radiator.
CN201810007121.7A 2018-01-04 2018-01-04 Minitype radiator and its manufacture method based on lotus leaf microcosmic surface Pending CN108010893A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810007121.7A CN108010893A (en) 2018-01-04 2018-01-04 Minitype radiator and its manufacture method based on lotus leaf microcosmic surface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810007121.7A CN108010893A (en) 2018-01-04 2018-01-04 Minitype radiator and its manufacture method based on lotus leaf microcosmic surface

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112687641A (en) * 2020-12-19 2021-04-20 复旦大学 Method for preparing semiconductor power module heat dissipation water channel through 3D printing
CN114433874A (en) * 2021-12-22 2022-05-06 首都航天机械有限公司 Design and manufacturing method of leaf-tissue-imitated porous radiator

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1423838A (en) * 2000-02-18 2003-06-11 英特尔公司 Parallel-plate/pin-fin hybrid copper heat sink for coding high-powered microprocessor
US20090065174A1 (en) * 2007-09-10 2009-03-12 Yu-Jen Lai Heat sink for an electrical device and method of manufacturing the same
CN201589547U (en) * 2009-08-09 2010-09-22 隋秀华 Novel air cooler
WO2013153486A1 (en) * 2012-04-10 2013-10-17 Koninklijke Philips N.V. Heat sink
CN105877875A (en) * 2016-05-27 2016-08-24 华南理工大学 Personalized thyroid cartilage prosthesis and production method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1423838A (en) * 2000-02-18 2003-06-11 英特尔公司 Parallel-plate/pin-fin hybrid copper heat sink for coding high-powered microprocessor
US20090065174A1 (en) * 2007-09-10 2009-03-12 Yu-Jen Lai Heat sink for an electrical device and method of manufacturing the same
CN201589547U (en) * 2009-08-09 2010-09-22 隋秀华 Novel air cooler
WO2013153486A1 (en) * 2012-04-10 2013-10-17 Koninklijke Philips N.V. Heat sink
CN105877875A (en) * 2016-05-27 2016-08-24 华南理工大学 Personalized thyroid cartilage prosthesis and production method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112687641A (en) * 2020-12-19 2021-04-20 复旦大学 Method for preparing semiconductor power module heat dissipation water channel through 3D printing
CN112687641B (en) * 2020-12-19 2022-09-27 复旦大学 Method for preparing semiconductor power module heat dissipation water channel through 3D printing
CN114433874A (en) * 2021-12-22 2022-05-06 首都航天机械有限公司 Design and manufacturing method of leaf-tissue-imitated porous radiator
CN114433874B (en) * 2021-12-22 2023-08-29 首都航天机械有限公司 Design and manufacturing method of leaf-like tissue porous radiator

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Application publication date: 20180508