CN217183688U - Ultrahigh heat flow density carbon-aluminum composite temperature-equalizing plate and heat radiating device - Google Patents
Ultrahigh heat flow density carbon-aluminum composite temperature-equalizing plate and heat radiating device Download PDFInfo
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- CN217183688U CN217183688U CN202220369746.XU CN202220369746U CN217183688U CN 217183688 U CN217183688 U CN 217183688U CN 202220369746 U CN202220369746 U CN 202220369746U CN 217183688 U CN217183688 U CN 217183688U
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Abstract
The utility model particularly relates to a compound temperature equalization board of super high heat flux density carbon aluminium and heat abstractor for solve the current short and unable instantaneous super high heat flux density's that satisfies the repetition frequency output problem of enduring the life-span of passive form heat abstractor. The utility model comprises a bottom plate and a cover plate, wherein a graphite heat transfer plate is embedded on the lower surface of the bottom plate, the upper surface of the bottom plate is connected with the lower surface of the cover plate, and a cavity is formed between the upper surface of the bottom plate and the lower surface of the cover plate; the cavity is in a vacuum state, a supporting structure is arranged in the cavity, one end of the supporting structure is connected with the upper surface of the bottom plate, and the other end of the supporting structure is connected with the upper surface of the cover plate; a plurality of capillary structures are arranged in the cavity, and the capillary structures are tightly attached to the bottom plate, the cover plate and the supporting structure; the cavity is also filled with flowing liquid cooling working medium. The utility model discloses utilize high heat conduction graphite material to open up the flat to the energy of super high heat flux density, utilize high heat conduction temperature-uniforming plate structure to effluvium rapidly with the heat of transmission, solve the instantaneous super high heat flux density heat dissipation problem that space high power equipment repetition frequency exported.
Description
Technical Field
The utility model relates to a heat abstractor, concretely relates to compound samming board of super high heat flux density carbon aluminium and heat abstractor.
Background
With the development of high power devices in space, the devices generate high heat in some electronic devices and related devices inside the system while triggering high energy output, such as phased array and TR components of high power radar, gain medium disks of high power lasers, and the like. The heat dissipation area of the heat generating component is usually small due to the compact structure of the equipment, so that the heat dissipation area can reach 500W cm instantly -2 The above ultra-high heat flux density provides challenges to passively dissipating heat from electronic components.
The heat dissipation has the typical characteristics of ultrahigh heat flux density and heavy frequency output facing the current high-power equipment. The high thermal conductivity materials such as the annealed pyrolytic graphite with ultrahigh thermal conductivity, which are provided by the Chinese invention patent with the publication number of CN108793152A, have the endurance life which is difficult to meet the requirements. The high heat-conducting carbon-aluminum composite soaking plate and other radial heat pipes provided by the Chinese utility model with the publication number of CN 212013418U, the high heat-conducting carbon-aluminum composite soaking plate provided by the Chinese utility model with the publication number of CN209230376U can not meet the design requirement of bearing the instantaneous ultrahigh heat flux density of the repeated frequency output. Therefore, the requirement of space high-power equipment for further improving output energy is restricted, and a passive heat dissipation structure device resistant to high heat flow density is needed.
SUMMERY OF THE UTILITY MODEL
The utility model provides a compound temperature-uniforming plate of super high heat flux density carbon aluminium for solve the problem that the passive form heat abstractor of current super high heat flux density tolerates the life-span short and can't satisfy the instantaneous super high heat flux density that bears the repetition frequency output.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
the carbon-aluminum composite temperature-equalizing plate with ultrahigh heat flow density is characterized in that: comprises a bottom plate and a cover plate;
the lower surface of the bottom plate is embedded with a graphite heat transfer plate, and the graphite heat transfer plate is used for being in contact with a heat source to be radiated;
the upper end surface of the bottom plate is provided with an inwards concave containing cavity, the cover plate is fixedly connected with the upper end surface of the bottom plate, and a closed vacuum cavity is formed between the cover plate and the bottom plate;
at least one support structure is arranged in the cavity;
one end of the supporting structure is connected with the bottom surface of the cavity, and the other end of the supporting structure is connected with the top surface of the cavity;
capillary structures are arranged on the side wall of the cavity and the side surface of the supporting structure;
and the cavity is filled with flowing cooling working medium.
Furthermore, the graphite heat transfer plate is fixed on the lower surface of the bottom plate through a plurality of cylindrical fixing columns, and the fixing columns are located on the periphery of the graphite heat transfer plate.
Further, the support structure is a 3 × 3 matrix-type distribution cylinder.
Further, the capillary structure is three-dimensional reticular foamed nickel and the thickness is 1 mm.
Further, the cooling working medium is acetone.
Further, the graphite heat transfer plate has a radial thermal conductivity of at least 1600W/(m.K).
A heat dissipation device with ultrahigh heat flow density is characterized in that: the ultrahigh heat flow density carbon-aluminum composite temperature-uniforming plate comprises a condensing device arranged on the upper surface of a cover plate.
Compared with the prior art, the beneficial effects of the utility model are specifically as follows:
the utility model discloses a graphite heat transfer plate and temperature-uniforming plate composite construction rely on the high thermal conductivity graphite material of high performance thermal shock resistance to flatten the energy of super high heat flux density, reach the purpose of alleviating high power repetition frequency equipment monocycle internal average heat flux density, then through the heat effluvium rapidly of high heat conduction temperature-uniforming plate with the transmission, satisfied the tolerance life-span and high-efficient radiating requirement simultaneously.
Drawings
FIG. 1 is a bottom view of the composite vapor chamber;
FIG. 2 is a radial cross-sectional view of the composite vapor chamber;
fig. 3 is an axial sectional view of the composite vapor chamber.
Wherein the reference numerals are as follows:
1-bottom plate, 2-cover plate, 3-graphite heat transfer plate, 4-fixed column, 5-support structure, 6-steam channel, 7-capillary structure, 8-heat source and 9-condensing device.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides a compound temperature uniforming plate of super high heat flow density carbon aluminium, as shown in fig. 1 to 3, including bottom plate 1 and apron 2, the diffusion welding of depressed part has graphite heat transfer plate 3 in the middle of the 1 lower surface of bottom plate to fix graphite heat transfer plate 3 at 1 lower surface of bottom plate through fixed column 4 of round platform form, fixed column 4 is located graphite heat transfer plate 3 all around along, can reduce its influence to heat source energy at the radial heat transfer of graphite heat transfer plate 3. The graphite heat transfer plate 3 is in contact with an electronic device heat source 8 that generates heat.
The graphite heat transfer plate 3 is prepared from annealed pyrolytic graphite, the radial heat conductivity needs to reach more than 1600W/(m.K), and the contact surface of the graphite heat transfer plate 3 and a heat source is a smooth contact surface for forming smaller contact thermal resistance.
The upper surface of the base plate 1 is connected with the lower surface of the cover plate 2, a cavity is formed between the upper surface and the lower surface, and the cavity is processed into a vacuum state. Be provided with the cylindrical bearing structure 5 that 3 x 3 matrix distributes in the cavity and be used for preventing that the cavity warp, bearing structure 5 one end is connected with bottom plate 1, and the other end is connected with apron 2.
Evenly be provided with four capillary structure 7 in the cavity, capillary structure 7 is three-dimensional netted foam nickel, hugs closely in bottom plate 1, apron 2 and bearing structure 5, and every layer thickness is 1mm, still packs in the cavity and has flowed cooling medium, has reduced the boiling point of cooling medium so that the evaporation of cooling medium operates in the vacuum environment, adopts acetone as cooling medium.
The upper surface of the cover plate 2 is connected with a condensing device 9 which can solidify gaseous cooling working media into liquid.
When the composite temperature-uniforming plate works, cooling working medium acetone positioned in three-dimensional reticular foam nickel on one side of a heat source 8 absorbs heat and is converted into a gas state from a liquid state, the gas state acetone moves in the cavity in the direction of the condensing device 9 and is converted into a liquid state in the three-dimensional reticular foam nickel on one side of the condensing device 9, and the liquid state acetone flows back to one side of the heat source 8 under the action of capillary force of the three-dimensional reticular foam nickel, so that the composite temperature-uniforming plate forms a complete condensing loop.
The utility model provides a pair of compound temperature-uniforming plate of super high heat flow density carbon aluminium's preparation step is as follows:
step 1: adding a solder between contact surfaces of the annealed pyrolytic graphite plate and the aluminum plate, assembling, welding by vacuum brazing and finishing outer surface treatment to manufacture a carbon-aluminum composite material as a bottom plate 1;
step 2: the carbon-aluminum composite material is punched or etched to form an inner groove step and a support structure 5, and the inner groove step is used for forming a cavity subsequently;
and step 3: an aluminum plate is adopted, an inner groove step of the cover plate is formed by stamping or etching to serve as the cover plate 2, and the inner groove step of the cover plate is used for forming a cavity in the follow-up process;
and 4, step 4: cutting a liquid absorption core material into uniform and conformal film layers, filling the film layers in the cavity, tightly attaching the film layers to the bottom plate 1 and the cover plate 2 through pressing, and bonding the film layers to the side surfaces of the supporting structure 5 through resistance welding;
and 5: forming a sealed cavity between the cover plate 2 and the bottom plate 1 by brazing;
step 6: the graphite heat transfer plate 3 is exposed by cutting the lower surface of the bottom plate 1;
and 7: acetone is injected into the cavity, and vacuum is pumped, so that the cooling liquid is evaporated.
The composite temperature-uniforming plate manufactured by adopting the mode has the tolerance to ultrahigh heat flow density improved to 500W-cm -2 The above.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a compound temperature-uniforming plate of super high heat flow density carbon aluminium which characterized in that: comprises a bottom plate (1) and a cover plate (2);
the lower surface of the bottom plate (1) is embedded with a graphite heat transfer plate (3), and the graphite heat transfer plate (3) is used for being in contact with a heat source (8) to be radiated;
the upper end surface of the bottom plate (1) is provided with an inwards concave containing cavity, the cover plate (2) is fixedly connected with the upper end surface of the bottom plate (1), and a closed vacuum cavity is formed between the cover plate and the bottom plate;
at least one support structure (5) is arranged in the cavity;
one end of the supporting structure (5) is connected with the bottom surface of the cavity, and the other end of the supporting structure is connected with the top surface of the cavity;
capillary structures (7) are arranged on the side wall of the cavity and the side surface of the supporting structure (5);
and the cavity is filled with flowing cooling working medium.
2. The ultra-high heat flow density carbon-aluminum composite temperature-uniforming plate of claim 1, wherein:
the graphite heat transfer plate (3) is fixed on the lower surface of the bottom plate (1) through a plurality of cylindrical fixing columns (4), and the fixing columns are located on the periphery of the graphite heat transfer plate (3).
3. The ultra-high heat flow density carbon-aluminum composite temperature-equalizing plate of claim 1 or 2, wherein:
the supporting structures (5) are cylinders distributed in a 3 x 3 matrix manner.
4. The ultra-high heat flow density carbon-aluminum composite temperature-uniforming plate of claim 3, wherein:
the capillary structure (7) is three-dimensional reticular foam nickel with the thickness of 1 mm.
5. The ultra-high heat flow density carbon-aluminum composite temperature-uniforming plate of claim 4, wherein:
the cooling working medium is acetone.
6. The ultra-high heat flow density carbon-aluminum composite temperature-uniforming plate of claim 5, wherein:
the graphite heat transfer plate (3) has a radial thermal conductivity of at least 1600W/(m.K).
7. A heat dissipation device with ultrahigh heat flux density is characterized in that: the ultra-high heat flow density carbon-aluminum composite temperature-equalizing plate comprises the ultra-high heat flow density carbon-aluminum composite temperature-equalizing plate as claimed in any one of claims 1 to 6, wherein the upper surface of the cover plate (2) is provided with a condensing device (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220369746.XU CN217183688U (en) | 2022-02-23 | 2022-02-23 | Ultrahigh heat flow density carbon-aluminum composite temperature-equalizing plate and heat radiating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220369746.XU CN217183688U (en) | 2022-02-23 | 2022-02-23 | Ultrahigh heat flow density carbon-aluminum composite temperature-equalizing plate and heat radiating device |
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| CN217183688U true CN217183688U (en) | 2022-08-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116038166A (en) * | 2023-03-31 | 2023-05-02 | 河北宇天材料科技有限公司 | Composite uniform-temperature water cooling structure based on welding and manufacturing method thereof |
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2022
- 2022-02-23 CN CN202220369746.XU patent/CN217183688U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116038166A (en) * | 2023-03-31 | 2023-05-02 | 河北宇天材料科技有限公司 | Composite uniform-temperature water cooling structure based on welding and manufacturing method thereof |
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