Graphite aluminum-based radiator
By embedding graphite particles on the aluminum alloy substrate to form graphite aluminum sheets and wrapping them with an aluminum frame, the high cost and vulnerability of graphite radiators are solved, and efficient heat dissipation and durability are improved.
Patent Information
- Application Number
- CN202421719209.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-07-19
AI Technical Summary
The existing graphite radiators have high production costs, high processing difficulty and are prone to collision and damage, which affect their usefulness.
A graphite aluminum-based structure is adopted, and graphite aluminum sheets with an aluminum alloy structure are formed by embedded graphite particles on the aluminum alloy substrate, and wrapped with peripheral aluminum frames. They are connected with friction welding and thermally conductive glue to form a fin structure.
It realizes efficient heat dissipation, reduces production costs and processing difficulty, and at the same time improves the durability of the radiator, avoids damage caused by slight bumps, and improves practicality.
Smart Images
Figure CN223080335U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of radiators, in particular to a graphite-aluminum-based radiator. Background Art
[0002] Traditional radiators are usually made of aluminum alloy or copper alloy. Radiators of these two materials have high thermal conductivity, which is a decisive factor for maintaining good heat dissipation function and an ideal medium for heat energy conversion. Compared with copper alloy materials, although the heat dissipation performance of aluminum alloy radiators is relatively poor, they have the characteristics of light weight, low cost, and high metal thermal strength, which makes aluminum alloy the most widely used material in radiators.
[0003] With the development of technology, the prior art has proposed radiators made of graphite. Such graphite radiators utilize the high thermal conductivity of graphite to improve the overall heat dissipation effect of the radiator. However, the existing graphite radiators have the following drawbacks: on the one hand, the production cost of pure graphite sheets is high and the processing difficulty is large, which is not conducive to mass production; on the other hand, graphite radiators are relatively fragile and are easily damaged by accidental bumps.
[0004] Therefore, how to design a graphite-aluminum-based radiator that can reduce production costs and processing difficulties while achieving high-efficiency heat dissipation, and at the same time improve its durability to avoid being damaged by minor bumps, so as to improve its practicability. Summary of the Utility Model
[0005] In view of the deficiencies of the prior art, the utility model provides a graphite-aluminum-based radiator, which can reduce production costs and processing difficulties while achieving high-efficiency heat dissipation, and at the same time improve its durability to avoid being damaged by minor bumps, so as to improve its practicability.
[0006] The purpose of the utility model is achieved through the following technical solutions:
[0007] A graphite-aluminum-based radiator includes a base plate and a plurality of fins. The plurality of fins are evenly arranged on the base plate, and a heat dissipation gap is formed between two adjacent fins.
[0008] Each fin includes an outer aluminum frame and a graphite-aluminum sheet. The graphite-aluminum sheet is arranged inside the outer aluminum frame, and the four edges of the graphite-aluminum sheet are in contact and fit with the outer aluminum frame.
[0009] The graphite-aluminum sheet is an aluminum-based alloy structure doped with graphite particles.
[0010] Both the base plate and the outer aluminum frame are made of aluminum alloy.
[0011] In one embodiment, the graphite-aluminum sheet is connected to the peripheral aluminum frame by friction welding.
[0012] In one embodiment, the thickness of the graphite-aluminum sheet is L1, the thickness of the peripheral aluminum frame is L2, and L1 = L2; the width of the heat dissipation gap is L3, and L3 > L1.
[0013] In one embodiment, the thickness of the graphite-aluminum sheet is 1.0 - 1.5 mm, that is, 1.0 mm ≤ L1 ≤ 1.5 mm, and the width of the heat dissipation gap is 10 - 12 times the thickness of the graphite-aluminum sheet.
[0014] In one embodiment, the bottom edge of the peripheral aluminum frame is welded to the substrate.
[0015] In one embodiment, the peripheral aluminum frame is provided with a bent bottom edge, and the peripheral aluminum frame is riveted to the substrate through the bent bottom edge.
[0016] In one embodiment, the substrate is provided with a plurality of integrally formed convex rib strips. Among them, every two convex rib strips form a plug-in groove. The peripheral aluminum frame is provided with a curled edge, and the curled edge is received in the plug-in groove, and the two sides of the convex rib strips clamp the curled edge.
[0017] In one embodiment, a thermal conductive adhesive is provided between the plug-in groove and the curled edge.
[0018] In summary, the graphite-aluminum-based radiator of the present invention can reduce production costs and processing difficulties while achieving efficient heat dissipation, and at the same time improve its durability, avoiding damage when it is slightly knocked, thereby improving its practicability. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required in the embodiments.
[0020] Figure 1 is a schematic structural diagram of the graphite-aluminum-based radiator of the present invention;
[0021] Figure 2 is Figure 1 an exploded schematic diagram of the graphite-aluminum-based radiator shown;
[0022] Figure 3 is Figure 1 a schematic plan view of the graphite-aluminum-based radiator shown;
[0023] Figure 4 is Figure 2 an exploded structural diagram of the fin shown;
[0024] Figure 5 is Figure 2 a schematic plan view of the fin shown;
[0025] Figure 6 is Figure 2 a schematic partial structure view of the substrate shown;
[0026] Figure 7 is a schematic view of the mating state of the fin and the substrate of another embodiment. Detailed implementation manners
[0027] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model. Therefore, they do not have a substantial technical meaning. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right" and "middle" used in this specification are only for the convenience of clear narration, and are not used to limit the scope for the implementation of the present utility model. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope in which the present utility model can be implemented.
[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the specification of the present utility model herein are only for the purpose of describing specific implementation manners, and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.
[0029] The present utility model provides a graphite-aluminum-based radiator 100, as Figure 1 and Figure 2 shown, which includes a substrate 110 and a plurality of fins 120. The plurality of fins 120 are evenly arranged on the substrate 110, and a heat dissipation gap 130 is formed between two adjacent fins 120 (as Figure 3 shown).
[0030] Among them, as Figure 4As shown in the figure, each fin 120 includes an outer aluminum frame 121 and a graphite aluminum sheet 122. The graphite aluminum sheet 122 is disposed inside the outer aluminum frame 121, and the four peripheral edges of the graphite aluminum sheet 122 are in contact and fit with the outer aluminum frame 121. The graphite aluminum sheet 122 is an aluminum-based alloy structure doped with graphite particles, and the substrate 110 and the outer aluminum frame 121 are both aluminum alloy structures.
[0031] During use, the graphite aluminum-based radiator 100 is attached to the electronic chip or device that needs to be cooled, and the bottom of the substrate 110 is in contact with the electronic chip or device. During heat dissipation, the heat generated by the electronic chip or device will be sequentially transferred to the substrate 110 and the fins 120, and dissipated into the air by the fins 120. Generally, in order to accelerate heat dissipation, a fan is added to accelerate the gas flow rate in the heat dissipation gap 130 and improve the heat exchange efficiency of the fins 120.
[0032] Compared with the prior art, the fin 120 of the present utility model includes an outer aluminum frame 121 and a graphite aluminum sheet 122. The graphite aluminum sheet 122 has a higher thermal conductivity than the traditional aluminum sheet, which means that the heat exchange efficiency of the graphite aluminum sheet 122 is higher than that of the traditional aluminum sheet. The graphite aluminum sheet 122 can dissipate heat into the air more quickly, thereby improving the overall heat dissipation performance of the graphite aluminum-based radiator 100.
[0033] The graphite aluminum sheet 122 of the present utility model is an aluminum-based alloy structure doped with graphite particles. The reason for using this material is as follows: the thermal conductivity of the traditional aluminum sheet is at most 237 W / m·K, while the thermal conductivity of the high-purity graphite sheet can reach 600 - 2000 W / m·K, which is much greater than that of the traditional aluminum sheet. However, the production cost of the high-purity graphite sheet is high, the processing difficulty is large, and it is not easy to connect with the substrate 110 when processed into thin fins. To overcome the above drawbacks, graphite particles are doped into the aluminum sheet in the present utility model to obtain the graphite aluminum sheet 122, and then the outer aluminum frame 121 made of aluminum alloy is sleeved around the graphite aluminum sheet 122 to obtain the fin 120. The thermal conductivity of the fin 120 can reach about 534 W / m·K, and it has better heat dissipation performance than the traditional aluminum sheet.
[0034] The graphite aluminum sheet 122 of the present utility model can be produced and manufactured by the prior art. Its main production process is as follows: select high-purity graphite powder, crush and grind it into graphite particles with a diameter of 1 - 10 μm; then heat the aluminum to the molten state, add the graphite particles and the coupling agent into the molten aluminum liquid and stir and mix them, and then extrude and form them through an aluminum extrusion machine; finally, cut the formed graphite aluminum plate to obtain the graphite aluminum sheet 122 with appropriate dimensions.
[0035] The graphite aluminum sheet 122 used in the present utility model has the following advantages: on the one hand, the melting point of graphite is 3850 ± 50 °C, and the melting point of aluminum is 660 ± 50 °C. The temperature of aluminum extrusion is about 1000 °C. When aluminum is in a molten state, graphite particles can be better stirred evenly with the molten aluminum. Therefore, the thermal conductivity of the graphite aluminum sheet 122 is ensured to be stable in any area; on the other hand, the density of graphite is 2.09 - 2.33 g / cm 3 , and the density of aluminum is 2.7 g / cm 3 . After the graphite aluminum sheet 122 is made, while its thermal conductivity is improved, its overall weight will also be reduced. Therefore, it has an advantage in weight compared with aluminum or copper radiators.
[0036] In the present utility model, the structure of using the peripheral aluminum frame 121 to wrap the graphite aluminum sheet 122 can provide good protection for the graphite aluminum sheet 122, thereby avoiding damage caused by slight bumps of the graphite aluminum sheet 122 and improving its durability.
[0037] In this embodiment, the thickness of the graphite aluminum sheet 122 is L1, and the thickness of the peripheral aluminum frame 121 is L2, and L1 = L2. When the graphite aluminum sheet 122 and the peripheral aluminum frame 121 cooperate with each other, the graphite aluminum sheet 122 can be completely embedded inside the peripheral aluminum frame 121, so that the graphite aluminum sheet 122 is flush with the peripheral aluminum frame 121. The graphite aluminum sheet 122 can directly contact the air on both sides of the fin 120, so that the graphite aluminum sheet 122 can fully dissipate heat. Among them, the thickness of the graphite aluminum sheet is 1.0 - 1.5 mm, that is, 1.0 mm ≤ L1 ≤ 1.5 mm. Preferably, L1 = 1.2 mm.
[0038] The width of the heat dissipation gap 130 is L3, and L3 > L1. Preferably, the width of the heat dissipation gap 130 is 10 - 12 times the thickness of the graphite aluminum sheet 122, which can ensure that two adjacent fins 120 are not too close to each other, avoid mutual influence during heat dissipation, and ensure the heat dissipation efficiency.
[0039] Preferably, the graphite aluminum sheet 122 and the peripheral aluminum frame 121 are connected by friction welding. Compared with traditional welding methods, the friction welding method can make the effective contact area between the graphite aluminum sheet 122 and the peripheral aluminum frame 121 larger, which can make heat transfer better from the peripheral aluminum frame 121 to the graphite aluminum sheet 122.
[0040] Furthermore, in order to enable the peripheral aluminum frame 121 to be stably installed on the substrate 110, in this embodiment, the substrate 110 and the peripheral aluminum frame 121 are both specially designed. Specifically, as Figure 5 and Figure 6As shown, several integrally formed rib strips 111 are provided on the substrate 110. Among them, every two rib strips 111 jointly form a socket groove 112. And a curled edge 123 is provided on the peripheral aluminum frame 121, and the curled edge 123 is received in the socket groove 112 (as Figure 3 shown), and after installation, the rib strips 111 on both sides clamp the curled edge 123.
[0041] Preferably, a thermal conductive adhesive is provided between the socket groove 112 and the curled edge 123. The thermal conductive adhesive can not only provide an adhesive effect but also improve the heat conduction efficiency between the two.
[0042] It should be noted that the curled edge 123 is formed by folding the bottom edge of the peripheral aluminum frame 121 multiple times. Such a design can obtain the following benefits: First, compared with the way that the bottom edge of the peripheral aluminum frame 121 directly contacts the substrate 110, by using the cooperation of the curled edge 123 and the socket groove 112, the contact area between the two can be greatly increased, which is beneficial to improving the heat conduction efficiency; Second, the curled edge 123 and the socket groove 112 are connected by cooperation instead of using a welding connection method, which can simplify the processing process and thus improve the production efficiency; Third, the curled edge 123 is formed by folding multiple times, which enables the peripheral aluminum frame 121 to be processed only by stamping, thus reducing the production and processing difficulty.
[0043] In another embodiment, as Figure 7 shown, a bent bottom edge 124 is provided on the peripheral aluminum frame 121, and the peripheral aluminum frame 121 is riveted to the substrate 110 through the bent bottom edge 124. The setting of the bent bottom edge 124 is also to increase the contact area with the substrate 110, so as to achieve better heat conduction efficiency. Of course, in other embodiments, the bottom edge of the peripheral aluminum frame 121 can also be directly welded to the substrate 110, which can also achieve the installation of the fin 120 on the substrate 110.
[0044] In summary, the graphite aluminum-based radiator 100 of the present invention can reduce the production cost and processing difficulty on the basis of realizing efficient heat dissipation, while improving its durability and avoiding damage when it is slightly bumped, thereby improving its practicability.
[0045] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.
Claims
1. A graphite-aluminum-based radiator, characterized in that, It includes a substrate and a plurality of fins. The plurality of fins are evenly arranged on the substrate, and a heat dissipation gap is formed between two adjacent fins; Each fin includes an outer aluminum frame and a graphite aluminum sheet. The graphite aluminum sheet is disposed inside the outer aluminum frame, and the four peripheral edges of the graphite aluminum sheet are in contact and fit with the outer aluminum frame; The graphite aluminum sheet is an aluminum-based alloy structure doped with graphite particles, Both the substrate and the outer aluminum frame are aluminum alloy structures.
2. The graphite aluminum-based radiator according to claim 1, wherein, The graphite aluminum sheet and the outer aluminum frame are connected by friction welding.
3. The graphite aluminum-based radiator according to claim 1, characterized in that, The thickness of the graphite aluminum sheet is L1, the thickness of the outer aluminum frame is L2, and L1 = L2; the width of the heat dissipation gap is L3, and L3 > L1.
4. The graphite-aluminum-based radiator according to claim 3, wherein, The thickness of the graphite aluminum sheet is 1.0 - 1.5 mm, that is, 1.0 mm ≤ L1 ≤ 1.5 mm, and the width of the heat dissipation gap is 10 - 12 times the thickness of the graphite aluminum sheet.
5. The graphite-aluminum-based radiator according to claim 1, wherein The bottom edge of the outer aluminum frame is welded to the substrate.
6. The graphite-aluminum-based radiator according to claim 1, wherein, The outer aluminum frame is provided with a bent bottom edge, and the outer aluminum frame is riveted to the substrate through the bent bottom edge.
7. The graphite aluminum-based radiator according to claim 1, wherein The substrate is provided with a number of integrally formed convex rib strips. Among them, every two convex rib strips form a plug-in groove. The outer aluminum frame is provided with a curled edge, and the curled edge is received in the plug-in groove, and the two side convex rib strips clamp the curled edge.
8. The graphite-aluminum-based radiator according to claim 7, wherein There is a thermal conductive adhesive between the plug-in groove and the curled edge.