CN109714932A - Network base station radiating cabinet - Google Patents
Network base station radiating cabinet Download PDFInfo
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- CN109714932A CN109714932A CN201811521649.2A CN201811521649A CN109714932A CN 109714932 A CN109714932 A CN 109714932A CN 201811521649 A CN201811521649 A CN 201811521649A CN 109714932 A CN109714932 A CN 109714932A
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Abstract
The present invention provides a kind of network base station radiating cabinet, including cabinet body, and the accommodating chamber for accommodating base station equipment is formed in cabinet body；Cabinet body includes multiple sidings, at least one siding is cold plate, cold plate includes the first face close to accommodating chamber and the second face far from accommodating chamber, it is tightly connected between first face and the second face to form seal cavity, it include the first capillary structure layer in seal cavity, second capillary structure layer and multiple capillary support columns, first capillary structure layer is arranged on the first face, working solution is adsorbed in first capillary structure layer, second capillary structure layer is arranged on the second surface, multiple capillary support columns are arranged between the first capillary structure layer and the second capillary structure layer, two adjacent capillary support columns and the first capillary structure layer and the second capillary structure layer surround a vapor chamber jointly.The present invention can rapidly distribute the heat of interior of the cabinet into external environment, and base station equipment is made to keep good working order.
Description
Technical field
The present invention relates to heat dissipation technology more particularly to a kind of network base station radiating cabinets.
Background technique
In order to make the network base station damage of communication equipment, network base station is usually mounted on corresponding cabinet by industry
In.As communication system gradually develops to 4G, 5G from 2G, 3G, network base station equipment is also increasingly to large capacity, high-power, high
Integrated level direction is developed, and the heat that network base station generates during the work time is also continuously increased, and environment temperature is to influence network
One of an important factor for base station performance and reliability, how to control the temperature in cabinet is asking for equipment supplier's urgent need to resolve
Topic.
At work, output power only accounts for a part of equipment input power to network base station, and power loss is generally all
It is to be come out in the form of thermal energy.A kind of mode in the prior art is using passively free convection and finned
Mode radiate, but use such mode base station noise at runtime larger, when base station is arranged close to residential block
Place when significant discomfort use.
Another way in the prior art be in cabinet body install additional active refrigeration equipment (such as air-conditioning, fan) carry out it is scattered
Heat, although its effect is preferable compared to the effect of passive heat radiation, its energy consumption is higher, and poor reliability.
Summary of the invention
In order to overcome the drawbacks described above under the prior art, the purpose of the present invention is to provide a kind of network base station radiating cabinet,
Radiating cabinet good heat dispersion performance of the invention, and energy consumption is lower, good reliability.
One embodiment of the invention provides a kind of network base station radiating cabinet, including cabinet body, is formed in the cabinet body for holding
Receive the accommodating chamber of base station equipment；The cabinet body includes multiple sidings, at least one described siding is cold plate, the cold plate packet
The first face close to the accommodating chamber and the second face far from the accommodating chamber are included, seals and connects between first face and the second face
It connects to form seal cavity, includes the first capillary structure layer, the second capillary structure layer and multiple capillary branch in the seal cavity
Dagger, first capillary structure layer are arranged on first face, are adsorbed with working solution in first capillary structure layer, institute
It states the second capillary structure layer to be arranged on second face, multiple capillary support columns are arranged in first capillary structure layer
And second between capillary structure layer, the capillary support column of adjacent two and first capillary structure layer and the second capillary knot
Structure layer surrounds a vapor chamber jointly.
The present invention, which passes through, is arranged to cold plate at least one of the multiple sidings for forming cabinet body, and cold plate includes close holds
Receive chamber the first face and far from accommodating chamber the second face, be tightly connected between the first face and the second face, the first capillary structure layer is set
Set on the first face, be adsorbed with working solution in the first capillary structure layer, the second capillary structure layer is arranged on the second surface, the two it
Between be equipped with multiple capillary support columns, adjacent capillary support column is separated out multiple vapor chambers.In use, the heat that base station equipment generates
Amount is transferred to the first capillary structure layer by the first face, the heated steam raising of the working solution being adsorbed in the first capillary structure layer；
Gaseous working solution reaches the second capillary structure layer by vapor chamber, and liquefaction is pre-chilled in the second capillary structure layer；The work of liquid
Make liquid and be back to the first capillary structure layer by multiple capillary support columns, to complete one cycle.It works in cyclic process
Liquid phase can absorb and release a large amount of heat during becoming, to rapidly distribute the heat of interior of the cabinet to external environment
In, so that base station equipment is kept good working order.
Network base station radiating cabinet as described above, optionally, first capillary structure layer, the second capillary structure layer and more
A capillary support column is integrally formed.
Manufacture craft can be simplified using integrally formed structure, save the time, improve production efficiency.
Network base station radiating cabinet as described above, optionally, first capillary structure layer, the second capillary structure layer and more
A capillary support column is sintered by least one of copper powder, aluminium powder, nickel powder or carbon nanopowder.
Network base station radiating cabinet as described above, optionally, multiple capillary support columns are evenly distributed on described first
Between capillary structure layer and the second capillary structure layer.
Multiple capillary support columns are evenly distributed between the first capillary structure layer and the second capillary structure layer can make it is more
A vapor chamber is uniformly distributed, to keep radiating rate everywhere almost the same.
Network base station radiating cabinet as described above, optionally, the cold plate are the roof of the cabinet body.
Network base station radiating cabinet as described above, optionally, the siding includes first shell and is set in described first
The second shell of hull outside forms vacuum chamber between the first shell and second shell.
The siding for forming cabinet body is arranged to include first shell and second shell structure, and by first shell and second
Vacuum chamber is set as between shell, noise when vacuum chamber effectively can prevent base station equipment from running is transferred to external environment
In, so that the scope of application of the application is wider.
Network base station radiating cabinet as described above, optionally, the first shell constitutes the seal cavity.
Network base station radiating cabinet as described above, optionally, the side of the siding towards external environment is additionally provided with heat dissipation
Coating.
It can speed up the radiating efficiency of cabinet body by the way that thermal dispersant coatings are arranged, further protect the normal operation of base station equipment.
Network base station radiating cabinet as described above, optionally, the thermal dispersant coatings are graphite ene coatings.
Graphite ene coatings can be made of graphene coating, and the modified colloidal particle which crosses through high-temperature process (is less than
100 nanometers) Coagulating binding film forming occurs.It is in fish scale-like structure after coating film forming, is conducive to radiation of heat, and with higher
The properties such as visible light and near infrared light reflectivity, higher thermal infrared emissivity and stability.
Network base station radiating cabinet as described above further includes optionally spinel metal oxide in the thermal dispersant coatings
And rare earth oxide.
Spinel metal oxide pyroconductivity with higher and infrared emission, after mixing spinel metal oxide
The bright and clean and microcosmic wavy irradiation structure unit of macroscopic view is presented after coating can be made to form a film, such construction can greatly increase scattered
Heat area and pyroconductivity are obviously improved the effect of heat exchange.Increased simultaneously by the spinel metal oxide of electron transition
Add electron energy level, improved object infrared radiation coefficient, and maintains corresponding thermal stability, heat resistance, high intensity, corrosion resistant
The excellent properties such as corrosion, wearability.
Integral strength, ageing resistance and the thermal stability of coating can be improved in incorporation rare earth oxide, improves coating
Overall activity, optimize the various parameters performance of coating.
Network base station radiating cabinet provided by the invention, by being arranged at least one of the multiple sidings for forming cabinet body
Cold plate, cold plate include the first face of nearly accommodating chamber and the second face far from accommodating chamber, are sealed between the first face and the second face
Connection, the first capillary structure layer are arranged on the first face, and working solution, the second capillary structure layer are adsorbed in the first capillary structure layer
Setting on the second surface, is equipped with therebetween multiple capillary support columns, and adjacent capillary support column is separated out multiple vapor chambers.Make
Used time, the heat that base station equipment generates are transferred to the first capillary structure layer by the first face, are adsorbed in the first capillary structure layer
Working solution be heated steam raising；Gaseous working solution reaches the second capillary structure layer by vapor chamber, in the second capillary structure
Liquefaction is pre-chilled in layer；The working solution of liquid is back to the first capillary structure layer by multiple capillary support columns, to complete primary
Circulation.A large amount of heat can be absorbed and released in working solution phase transition process in cyclic process, thus rapidly by interior of the cabinet
Heat distribute into external environment, make base station equipment keep good working order.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structure diagram for the network base station radiating cabinet that one embodiment of the invention provides；
Fig. 2 is the structure diagram for the siding that one embodiment of the invention provides；
Fig. 3 is the sectional view for the siding that one embodiment of the invention provides.
Appended drawing reference:
100- cabinet body；
101- first shell；
102- second shell；
110- cabinet door；
120- partition；
200- cold plate；
The first capillary structure layer of 210-；
The second capillary structure layer of 220-；
230- capillary support column；
240- vapor chamber；
300- thermal dispersant coatings；
1000- base station equipment.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.
Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.In the absence of conflict, following embodiment and implementation
Feature in example can be combined with each other.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be direct phase
Even, can also indirectly connected through an intermediary, it can be with
It is the interaction relationship of the connection or two elements inside two elements.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
It should be noted that in the description of the present invention, term " first ", " second ", which are only used for facilitating, describes different portions
Part is not understood to indicate or imply ordinal relation, relative importance or the number for implicitly indicating indicated technical characteristic
Amount." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one of the features.
In order to make the network base station damage of communication equipment, network base station is usually mounted on corresponding cabinet by industry
In.As communication system gradually develops to 4G, 5G from 2G, 3G, network base station equipment is also increasingly to large capacity, high-power, high
Integrated level direction is developed, and the heat that network base station generates during the work time is also continuously increased, and environment temperature is to influence network
One of an important factor for base station performance and reliability, how to control the temperature in cabinet is asking for equipment supplier's urgent need to resolve
Topic.
At work, output power only accounts for a part of equipment input power to network base station, and power loss is generally all
It is to be come out in the form of thermal energy.A kind of mode in the prior art is using passively free convection and finned
Mode radiate, but use such mode base station noise at runtime larger, when base station is arranged close to residential block
Place when significant discomfort use.
Another way in the prior art be in cabinet body install additional active refrigeration equipment (such as air-conditioning, fan) carry out it is scattered
Heat, although its effect is preferable compared to the effect of passive heat radiation, its energy consumption is higher, and poor reliability.
In order to overcome the drawbacks described above under the prior art, the purpose of the present invention is to provide a kind of network base station radiating cabinet,
Radiating cabinet good heat dispersion performance of the invention, and energy consumption is lower, good reliability.
The contents of the present invention are described below in conjunction with attached drawing is detailed, so that those skilled in the art can be more
The detailed understanding contents of the present invention.
Fig. 1 is the structure diagram for the network base station radiating cabinet that one embodiment of the invention provides；Fig. 2 is one embodiment of the invention
The structure diagram of the siding of offer；Fig. 3 is the sectional view for the siding that one embodiment of the invention provides；Please refer to Fig. 1-Fig. 3.This reality
It applies example and a kind of network base station radiating cabinet, including cabinet body 100 is provided, be formed in cabinet body 100 for accommodating base station equipment 1000
Accommodating chamber；Cabinet body 100 includes multiple sidings, at least one siding is cold plate 200, and cold plate 200 includes close to accommodating chamber
Second face in the first face and separate accommodating chamber, is tightly connected between the first face and the second face to form seal cavity, seal cavity
It inside include the first capillary structure layer 210, the second capillary structure layer 220 and multiple capillary support columns 230, the first capillary structure layer
210 settings on the first face, are adsorbed with working solution in the first capillary structure layer 210, the second capillary structure layer 220 is arranged second
On face, multiple capillary support columns 230 are arranged between the first capillary structure layer 210 and the second capillary structure layer 220, and adjacent two
A capillary support column 230 and the first capillary structure layer 210 and the second capillary structure layer 220 surround a vapor chamber 240 jointly.
Specifically, the shape of the present embodiment cabinet body 100 can according to need and be configured, such as it can be cylindrical, rib
The shape of any suitables such as cylindricality or cone.The present embodiment is illustrated by taking rectangle cabinet body 100 as an example, and the one of cabinet body 100
A side is equipped with opening, and opening is hingedly connected with cabinet door 110, can specifically be cut with scissors cabinet door 110 and cabinet body 100 by hinge
It connects in succession.Multiple partitions 120 are equipped in accommodating chamber inside cabinet body 100, partition 120 is parallel to ground, inside cabinet body 100
It is divided into multiple spaces, the height of adjacent separator 120 can be arranged according to the mounting height of base station equipment 1000, in order to mounted base station
Equipment 1000.
Forming at least one in multiple sidings of cabinet body 100 is cold plate 200, and cold plate 200 has close to accommodating chamber
The first face and far from accommodating chamber the second face, between the first face and the second face be tightly connected to form seal cavity, seal chamber
It in vivo include the first capillary structure layer 210, the second capillary structure layer 220 and multiple capillary support columns 230, the first capillary structure layer
210 can be arranged on the first face by modes such as bondings, be adsorbed with working solution in the first capillary structure layer 210, working solution is optional
Select any one of water, ammonium hydroxide, fluoroether refrigerant；Second capillary structure layer 220 can be arranged in second by modes such as bondings
On face.Multiple capillary support columns 230 are arranged between the first capillary structure layer 210 and the second capillary structure layer 220, capillary support
Column 230 undertakes the effect in support the first face and the second face, two adjacent capillary support columns 230 and the first capillary structure layer simultaneously
210 and second capillary structure layer 220 surround a vapor chamber 240 jointly.
For the circulation for accelerating heat in cabinet body 100, can also blower and/or water-cooling wall be set in cabinet body 100 to assist
Heat dissipation.Its specific installation form belongs to the prior art, and the present embodiment does not further limit this.
The present embodiment, which passes through, is arranged to cold plate 200, cold plate at least one of the multiple sidings for forming cabinet body 100
200 include the first face of nearly accommodating chamber and the second face far from accommodating chamber, is tightly connected between the first face and the second face, first mao
Fine texture layer 210 is arranged on the first face, working solution is adsorbed in the first capillary structure layer 210, the second capillary structure layer 220 is set
It sets on the second surface, is equipped with multiple capillary support columns 230 therebetween, adjacent capillary support column 230 is separated out multiple steam
Chamber 240.In use, the heat that base station equipment 1000 generates is transferred to the first capillary structure layer 210 by the first face, it is adsorbed on the
The heated steam raising of working solution in one capillary structure layer 210；Gaseous working solution reaches the second capillary knot by vapor chamber 240
Liquefaction is pre-chilled in structure layer 220 in the second capillary structure layer 220；The working solution of liquid is back to by multiple capillary support columns 230
First capillary structure layer 210, to complete one cycle.It can be absorbed and released in working solution phase transition process in cyclic process big
The heat of amount makes base station equipment keep good work to rapidly distribute the heat of interior of the cabinet into external environment
State.
Further, in this embodiment the first capillary structure layer 210, the second capillary structure layer 220 and the support of multiple capillarys
Column 230 is integrally formed.
Manufacture craft can be simplified using integrally formed structure, save the time, improve production efficiency.
Specifically, first capillary structure layer 210 of the present embodiment, the second capillary structure layer 220 and multiple capillary support columns
230 are sintered by least one of copper powder, aluminium powder, nickel powder or carbon nanopowder, can be disposably made using sintering process
Above structure simplifies technique, improves efficiency.
Further, multiple capillary support columns 230 are evenly distributed on the first capillary structure layer 210 and the second capillary structure layer
Between 220.
Multiple capillary support columns 230 are evenly distributed between the first capillary structure layer 210 and the second capillary structure layer 220
Multiple vapor chambers 240 can be made to be uniformly distributed, to keep radiating rate everywhere almost the same.
Further, the cold plate 200 of the present embodiment is preferably the roof of cabinet body 100, so as to utilize the work of gravity
The first capillary structure layer 210 is back to from the second capillary structure layer 220 with the working solution of acceleration liquid.
Further, the siding of the present embodiment includes first shell 101 and the second shell for being set in 101 outside of first shell
Body 102 forms vacuum chamber between first shell 101 and second shell 102.
The siding for forming cabinet body 100 is arranged to include first shell 101 and second shell 102 structure, and by first
Vacuum chamber is set as between shell 101 and second shell 102, when vacuum chamber can effectively prevent base station equipment 1000 from running
Noise is transferred in external environment, and when use is quieter, so that the network base station radiating cabinet of the present embodiment can be applicable in
In city (such as residential block or market etc.), the scope of application is wider.
Further, said first shell 101 constitutes the seal cavity in cold plate 200.
Further, the present embodiment is additionally provided with thermal dispersant coatings 300 in the side of siding towards external environment.
It can speed up the radiating efficiency of cabinet body 100 by the way that thermal dispersant coatings 300 are arranged, further protect base station equipment 1000
It operates normally.
Optionally, thermal dispersant coatings 300 can be graphene coating.
Graphite ene coatings can be made of graphene coating, and the modified colloidal particle which crosses through high-temperature process (is less than
100 nanometers) Coagulating binding film forming occurs.It is in fish scale-like structure after coating film forming, is conducive to radiation of heat, and with higher
The properties such as visible light and near infrared light reflectivity, higher thermal infrared emissivity and stability.
It further, further include spinel metal oxide and rare earth oxide in thermal dispersant coatings 300.
Spinel metal oxide pyroconductivity with higher and infrared emission, after mixing spinel metal oxide
The bright and clean and microcosmic wavy irradiation structure unit of macroscopic view is presented after coating can be made to form a film, such construction can greatly increase scattered
Heat area and pyroconductivity are obviously improved the effect of heat exchange.Increased simultaneously by the spinel metal oxide of electron transition
Add electron energy level, improved object infrared radiation coefficient, and maintains corresponding thermal stability, heat resistance, high intensity, corrosion resistant
The excellent properties such as corrosion, wearability.
Integral strength, ageing resistance and the thermal stability of coating can be improved in incorporation rare earth oxide, improves coating
Overall activity, optimize the various parameters performance of coating.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of network base station radiating cabinet, which is characterized in that including cabinet body, be formed in the cabinet body for accommodating base station equipment
Accommodating chamber；The cabinet body includes multiple sidings, at least one described siding is cold plate, and the cold plate includes close to described
Second face in the first face of accommodating chamber and the separate accommodating chamber is tightly connected close to be formed between first face and the second face
Cavity is sealed, includes the first capillary structure layer, the second capillary structure layer and multiple capillary support columns in the seal cavity, described the
One capillary structure layer is arranged on first face, and working solution, second capillary are adsorbed in first capillary structure layer
Structure sheaf is arranged on second face, and multiple capillary support columns are arranged in first capillary structure layer and the second capillary
Between structure sheaf, the capillary support column of adjacent two encloses jointly with first capillary structure layer and the second capillary structure layer
At a vapor chamber.
2. network base station radiating cabinet according to claim 1, which is characterized in that first capillary structure layer, second mao
Fine texture layer and multiple capillary support columns are integrally formed.
3. network base station radiating cabinet according to claim 2, which is characterized in that first capillary structure layer, second mao
Fine texture layer and multiple capillary support columns are sintered by least one of copper powder, aluminium powder, nickel powder or carbon nanopowder.
4. network base station radiating cabinet according to claim 1, which is characterized in that multiple capillary support columns are uniformly distributed
Between first capillary structure layer and the second capillary structure layer.
5. network base station radiating cabinet according to claim 1, which is characterized in that the cold plate is the top of the cabinet body
Wall.
6. any network base station radiating cabinet in -5 according to claim 1, which is characterized in that the siding includes first shell
Body and the second shell being set on the outside of the first shell, form vacuum chamber between the first shell and second shell.
7. network base station radiating cabinet according to claim 6, which is characterized in that the first shell constitutes the seal chamber
Body.
8. any network base station radiating cabinet in -5 according to claim 1, which is characterized in that the siding is towards extraneous ring
The side in border is additionally provided with thermal dispersant coatings.
9. network base station radiating cabinet according to claim 8, which is characterized in that the thermal dispersant coatings are graphite ene coatings.
10. network base station radiating cabinet according to claim 9, which is characterized in that further include sharp brilliant in the thermal dispersant coatings
Stone metal oxide and rare earth oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811521649.2A CN109714932A (en) | 2018-12-13 | 2018-12-13 | Network base station radiating cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811521649.2A CN109714932A (en) | 2018-12-13 | 2018-12-13 | Network base station radiating cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109714932A true CN109714932A (en) | 2019-05-03 |
Family
ID=66255745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811521649.2A Pending CN109714932A (en) | 2018-12-13 | 2018-12-13 | Network base station radiating cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109714932A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114096108A (en) * | 2020-08-24 | 2022-02-25 | 华为技术有限公司 | Heat sink and method for manufacturing the same |
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| CN102318457A (en) * | 2011-07-26 | 2012-01-11 | 华为技术有限公司 | Radiating bin for communication device |
| CN107197612A (en) * | 2017-07-10 | 2017-09-22 | 广州华钻电子科技有限公司 | A kind of Superhydrophilic soaking plate |
| CN108471693A (en) * | 2018-03-20 | 2018-08-31 | 联想(北京)有限公司 | A kind of vaporation-type cooling system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006058341A2 (en) * | 2004-11-29 | 2006-06-01 | Sanmina-Sci Corporation | System and method for base station heat dissipation using chimneys |
| CN201892459U (en) * | 2009-11-27 | 2011-07-06 | 周业勋 | Thermal conducting device with capillary microstructure |
| CN102318457A (en) * | 2011-07-26 | 2012-01-11 | 华为技术有限公司 | Radiating bin for communication device |
| CN107197612A (en) * | 2017-07-10 | 2017-09-22 | 广州华钻电子科技有限公司 | A kind of Superhydrophilic soaking plate |
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| CN114096108A (en) * | 2020-08-24 | 2022-02-25 | 华为技术有限公司 | Heat sink and method for manufacturing the same |
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Application publication date: 20190503 |