TWM547820U - Heat dissipating device - Google Patents

Description

heat sink

This creation is about a heat sink, especially a heat sink that uses the smallest volume to maximize heat dissipation.

Many of the electronic or mechanical components or components known to date generate heat during their operation. In order to prevent them from degrading their performance or causing damage due to heat during operation, heat is added to the manufacturing or design. The heat sink or the heat dissipating component is dissipated from the electronic component or the mechanical component by heat conduction or the heat dissipating component, and then the heat generated by the electronic component or the mechanical component is removed from the working environment by using the circulating fluid for heat exchange. In turn, the temperature is lowered to improve the working efficiency of the component and avoid damage. The most common heat sink for electronic components is an aluminum extruded heat sink, which is widely used in various electronic components or thermal conductive components, such as conventional heat pipes, central processing unit (CPU) chips, and individuals. The heat sink of the substrate of the computer, the heat sink of the IC chip or the heat sink fin of the LED lamp holder, or the heat conductive member such as the outer casing and the heat sink (such as the sound amplifier casing). Generally, the structure of the aluminum extruded heat sink is as shown in FIG. 9. A plurality of parallel long ribs 51 are formed on the front surface of the plate-shaped heat sink body 50, and the back surface is a flat surface 52, and the flat surface 52 is thermally conductive. The glue is closely attached to the electronic component to absorb the heat generated by the electronic component, and the heat is transmitted to the plurality of long ribs 51 via the body 50, and the surface of the plurality of long ribs 51 dissipates heat to the outside, thereby achieving heat dissipation. purpose. However, the aforementioned conventional radiator is utilized, because It is necessary to increase the heat dissipation area by the plurality of long ribs 51, and in order to maintain a sufficient heat dissipation volume (the total volume of the body 50 to lengthen the ridges 51 is sufficient), it must be formed by extrusion processing technology, and thus will be described later. Many of the missing: 1. Only the long parallel strip 51 heat dissipation structure can be formed, and various shapes can not be formed as needed, such as densely protruding round pillars or radiating separate ridges, etc., thus having insufficient applicability. Missing; 2. Extrusion processing materials are limited by soft metals, mainly aluminum, for some hard metal or alloy, it is not applicable, so there is a limited lack of material selection; 3. After extrusion molding The burr is generated, and the burr must be processed, so that the processing cost is increased. 4. The heat sink body 50 has a flat surface 52. The heat conductive adhesive and the component are closely attached, and the air heat conduction function is not long. The surface of the ridge 51 is used for heat dissipation, and the heat dissipation performance is not good. Therefore, the conventional product has to be bulky in order to improve heat dissipation, and the large volume not only greatly increases the cost, but also gradually reduces the size of the current electronic products. On request, there does not meet the real needs of the missing.

Furthermore, Taiwan's new M292731 "heat dissipation structure" is based on a mesh-shaped heat sink fin on the heat sink base. Although the heat dissipation area can be increased by increasing the heat dissipation area, the mesh fins are not cooled. The planes of the pedestals are parallel, and the respective mesh fins are not arranged in a spaced manner, but are connected to each other at a specific angle, so that there is a large volume, a large space, and a limited application range.

Taiwan's new M352636 "heat sink", which is covered by a mesh heat sink on the front side of the LED light-emitting component, although the mesh heat sink can not only conduct the thermal energy of the LED light-emitting component, but also allow the light source to be worn by the mesh region. Shooting out, but the mesh area still blocks the transmittance of the light source, which affects the luminous efficacy of the LED light-emitting element. In addition, the mesh heat-dissipating device has a monolithic structure, and the heat-dissipating area is still insufficient, thereby affecting the overall Cooling performance.

Taiwan Invention No. I310298 "Radiator and its manufacturing method", which is formed by rolling a micro-concave structure on a sheet metal plate, and then forming a heat-dissipating fin of a concave-convex structure by a press working technique, and then using a heat-dissipating fin and a substrate The combination is to get the desired heat sink. Although the patent has the heat-dissipating heat-dissipating effect, the metal plate belongs to the structural form of the sheet, so that the specific surface area of the heat-dissipation is affected by the insufficient volume; in addition, the heat-dissipating heat sink of the patent must be subjected to the process of removing the burrs. Therefore, the complexity of the manufacturing process is increased; not only that, the error rate between the volume of the convex portion and the volume of the recess on the heat-dissipating fin of the patent is greater than 10%, and the error rate between the outer diameter of the convex portion and the inner diameter of the concave portion is greater than 10%. That is, the volume of the convex portion is greater than about 10% of the volume of the concave portion, and the outer diameter of the convex portion is greater than about 10% of the inner diameter of the concave portion; compared with the volume of each convex portion of the present invention, the volume of each concave portion is almost equal to the volume of each concave portion, The outer diameter of the convex portion is almost equal to the inner diameter of each concave portion, so that there are significant technical differences between the two. Of course, the invention No. I310298 limits the specific surface area of heat dissipation due to the small volume factor, thereby affecting the overall heat dissipation efficiency.

The reason is that although the technical features of forming the heat dissipating fins by the press working technique have been disclosed; however, until now, it has not been found that the heat sink of the convex portion volume is almost equal to the concave portion volume and the outer diameter of the convex portion is almost equal to the inner diameter of the concave portion. The patent or the thesis was put forward. Therefore, the creator of this novel is actively researching and researching, and after diligent development, finally developed a new type of utility that is more practical and more effective.

The first object of the present invention is to provide a heat sink. In addition to minimizing the volume to achieve maximum heat dissipation performance, since the volume of the convex portion is almost equal to the volume of the concave portion, the specific surface area of the heat dissipation can be effectively increased to enhance heat and air. Exchange efficiency. The technical means adopted for achieving the first purpose of the novel is to press the metal sheet to form a radiator sheet. The body is such that the heat sink sheet body includes opposite first and second faces. The first surface has a plurality of concave portions for heat conduction and heat dissipation, and the second surface has a plurality of convex portions for heat conduction and heat dissipation at positions of the respective concave portions. The error rate between the volume of each convex portion and the volume of each concave portion is less than 5%, and the error rate between the outer diameter of each convex portion and the inner diameter of each concave portion is less than 5%.

The second object of the present invention is to provide a heat sink which can further improve the heat dissipation performance, and can mainly easily increase the heat dissipation surface area, especially the concave step structure, so that the components required for heat dissipation are assisted by air conduction. The heat is quickly transferred to the convex portion and then dispersed to the outside by the surface of the convex portion. The technical means adopted for achieving the second object of the present invention is to press the metal sheet into a heat sink sheet body, so that the heat sink sheet body includes opposite first and second faces. The first surface of the metal plate has a plurality of concave portions for heat conduction and heat dissipation, and the second surface has a plurality of convex portions for heat conduction and heat dissipation at positions corresponding to the respective concave portions. The error rate between the volume of each convex portion and the volume of each concave portion is less than 5%, and the error rate between the outer diameter of each convex portion and the inner diameter of each concave portion is less than 5%, wherein the at least one convex portion and the At least one of the recesses has a stepped structure.

10‧‧‧Metal sheet

100‧‧‧ Radiator sheet body

11‧‧‧ first side

12‧‧‧ second side

110‧‧‧ recess

120‧‧‧ convex

20‧‧‧heating materials

T1‧‧‧ volume

T2‧‧‧ volume

30‧‧‧Pressing die

40‧‧‧Cropping device

50‧‧‧ radiator body

51‧‧‧ long ribs

52‧‧‧ Flat surface

1 is a schematic view showing the implementation of the second side of the first embodiment of the present invention.

Figure 2 is a top plan view of the first embodiment of the present invention.

Figure 3 is a cross-sectional view showing the first embodiment of the present invention.

4 is a schematic view showing the second embodiment of the second embodiment of the present invention;

Figure 5 is a top plan view of a second embodiment of the present invention.

Figure 6 is a schematic cross-sectional view showing a second embodiment of the present invention.

Figure 7 is a partial cross-sectional view showing a third embodiment of the present invention.

Figure 8 is a schematic view of the continuous implementation of the stamping process of the present invention.

Figure 9 is a schematic view of a conventional aluminum extruded heat sink.

In order to allow your review committee to further understand the technical features of the new model and the technical means to achieve the new purpose, it will be described in detail with specific examples and drawings: please refer to Figure 1~3 for the implementation of this new type. In a first embodiment of the present invention, the metal sheet 10 is press formed into a heat sink sheet body 100, and the metal sheet 10 includes opposite first faces 11 and second faces 12. The heat sink sheet body 100 has the same first surface 11 and second surface 12 of the metal sheet 10, so that the first surface 11 has a plurality of recesses 110 for heat conduction, and the second surface 12 is opposite to each recess. The position of 110 has a plurality of protrusions 120 for heat conduction. The error rate ((T2-T1)/T2) between the volume T1 of each convex portion 120 and the volume T2 of each concave portion 110 is less than 5%, preferably the volume T1 of each convex portion 120 and the volume T2 of each concave portion 110. The error rate between the two approaches is zero, that is, the volume T1 of each convex portion 120 is almost equal to the volume T2 of each concave portion 110; and the error ratio between the outer diameter of each convex portion 120 and the inner diameter of each concave portion 110 ( The inner diameter of the concave portion 110 minus the outer diameter of the convex portion 120 is divided by the inner diameter of the concave portion 110 is less than 5%, and preferably the error ratio between the outer diameter of each convex portion 120 and the inner diameter of each concave portion 110 approaches zero. That is, the outer diameter of each convex portion 120 is almost equal to the inner diameter of each concave portion 110. Moreover, the thickness of the heat-generating sheet-like body 100 is greater than the height of the convex portion 120. Preferably, the thickness of the heat-dissipating sheet-like body 100 is reduced by the height of the convex portion 120, and then the thickness of the heat-dissipating sheet-like body 100 is between 10 and 50. %, this can ensure that the convex portion 120 is formed by the displacement of the material of the heat-generating sheet-like body 100 originally located at the concave portion 110, and can ensure that the heat-generating sheet-like body 100 still retains its desired thickness volume.

Please refer to FIG. 1 to FIG. 3 and FIG. 7 for the second embodiment of the second object of the present invention. The metal sheet 10 is stamped and formed into a heat sink sheet body 100, gold. The slab 10 includes opposing first and second faces 11 and 12. The heat sink sheet body 100 has the same first surface 11 and second surface 12 of the metal sheet 10, so that the first surface 11 has a plurality of recesses 110 for heat conduction, and the second surface 12 is opposite to each recess. The position of 110 has a plurality of convex portions 120 for heat conduction. The error rate between the volume T1 of each convex portion 120 and the volume T2 of each concave portion 110 is less than 5%, and the error rate between the outer diameter of each convex portion 120 and the inner diameter of each concave portion 110 is less than 5%. The error rate between the volume T1 of the convex portion 120 and the volume T2 of each concave portion 110 approaches zero, that is, the volume T1 of each convex portion 120 is almost equal to the volume T2 of each concave portion 110; and the outer portions of the convex portions 120 are The error rate between the diameter and the inner diameter of each recess 110 (less than 5%, preferably the error ratio between the outer diameter of each convex portion 120 and the inner diameter of each concave portion 110 approaches zero, that is, each convex The outer diameter of the portion 120 is almost equal to the inner diameter of each recess 110. Referring to FIG. 7 again, each convex portion 120 and each concave portion 110 have a stepped structure, that is, the bottom portion of the concave portion 110 is further recessed with the small concave portion 111, and The top of the convex portion 120 of the concave portion 110 protrudes from the top portion of the concave portion 111 with respect to the small concave portion 111. Here, the overall heat dissipation surface area can be increased. Further, as shown in FIG. 3, the surface of the metal plate material 10 is coated. At least one layer of heat dissipating material 20.

Specifically, in the embodiment shown in FIGS. 1 to 3, the area ratio of all the concave portions 110 and the first surface 11 projected on a plane is 1:10 to 9:10. In contrast, the area ratio of all the convex portions 120 and the first surface 11 projected on a plane is 1:10 to 9:10. The foregoing design can be designed according to the thermal efficiency requirements of each component that needs to be dissipated, and in any case such a range of ratios can ensure sufficient heat dissipation performance.

Referring to the embodiment shown in FIG. 1 to FIG. 3, each of the recesses 110 and the protrusions 120 may be cylindrical; or a long column or a polygonal column; or as shown in FIG. It is a plurality of L-shaped symmetrical left and right. The shape of the concave portion 110 and the convex portion 120 or the state of the distribution can be designed by stamping a die according to actual needs.

Referring to the embodiment shown in FIG. 1 to FIG. 3, the metal sheet 10 is thicker than the first invention No. I310298, and the sheet metal sheet 10 may be made of aluminum, copper or It is made of metal alloy.

Referring to the embodiment shown in FIG. 8 , the metal sheet 10 is wound in a strip shape, and the wound strip metal sheet 10 is formed by punching through the stamping die 30 to form a plurality of continuous heat sinks. Then, the plurality of heat sinks that are continuously connected are respectively cut into a plurality of single radiators by the cutting device 40. In another embodiment, the wound strip metal sheet 10 can be pre-cut into a single piece of sheet metal 10 of a predetermined size through the cutting device 40, and then the single sheet metal sheet 10 is stamped through the stamping die 30. Here, the single piece of metal sheet 10 can be stamped into a heat sink having a plurality of convex portions 120 and a plurality of concave portions 110.

In addition, it must be noted that the air inside each recess 110 has the effect of assisting heat conduction, except that the heat sink sheet body 100 retains a sufficient heat dissipating volume and a sufficient contact area between the second surface 12 and the electronic component, due to the recess 120 has the auxiliary heat conduction function of air, so it can really improve the heat dissipation performance.

The advantages of the creation: 1. The stamping dislocation is integrally formed, so that the heat sink sheet body 100 having a sufficient thickness and volume has a better heat conduction performance, and the heat dissipation structure of the convex portion 120 formed by the integral stamping dislocation increases the heat dissipation again. The surface area is such that the optimal heat dissipation performance can be achieved under the principle of optimally miniaturized volume; 2. The convex portion 120 is formed by the stamping of the raw material of the heat sink sheet body 100 at the position of the concave portion 110, and the inner wall of the concave portion 110 is heated. The conductive area and the internal air have auxiliary thermal conductivity, which can also increase the heat dissipation performance of the created heat sink. 3. The convex portion 120 and the concave portion 110 respectively form a corresponding stepped structure, and the heat dissipation surface area can be greatly increased. In particular, the recessed portion 110 has a stepped structure, so that the heat-dissipating component is quickly transferred to the convex portion 120 by air-assisted conduction, and then dispersed to the outside by the surface of the convex portion 120; Jia San Heat can be applied to today's electronic products that emphasize downsizing, in line with the trend of the times; 5, one-time stamping, no need to remove the burrs, simplify the process, reduce costs; 6, according to the shape requirements of the product to be cooled, Shapes of protrusions of different shapes, such as cylindrical distribution, strip-shaped radiation distribution or L-shaped distribution, greatly improve the applicability of the product; 7. Available for strip-shaped metal sheets with multiple sets of heat sink-shaped molds, one-time stamping Forming multiple sets of heat dissipation, rapid transfer, stamping and cutting can produce a large number of original heat sinks, which can greatly reduce the cost.

The above description is only one of the possible embodiments of the present invention, and is not intended to limit the scope of the patents of the present invention, and the equivalent implementations of other changes according to the contents, features and spirits of the following claims are It should be included in the scope of this new patent. The new type is specifically defined in the structural features of the request item, is not found in the same kind of articles, and has practicality and progress. It has already met the requirements for the creation of patents, and has applied for it according to law. I would like to ask the bureau to approve the patent according to law. The legal rights of the applicant.

10‧‧‧Metal sheet

100‧‧‧ Radiator sheet body

11‧‧‧ first side

12‧‧‧ second side

120‧‧‧ convex

Claims (8)

A heat sink comprising a heat sink sheet body stamped by a stamping process, the heat sink sheet body comprising an opposite first side and a second side, the heat sink sheet body The first surface has at least one concave portion for heat conduction, and the second surface has at least one convex portion for heat conduction and heat dissipation at a position relative to the at least one concave portion, and the volume of the at least one convex portion The error rate between the volume of the at least one recess is less than 5%, and the error rate between the outer diameter of the at least one protrusion and the inner diameter of the at least one recess is less than 5%. The heat sink method of claim 1, wherein an area ratio of the at least one concave portion to the first surface projected on a plane is 1:10 to 9:10. The heat sink of claim 1, wherein the at least one recess and the at least one protrusion are respectively plural, and each of the recesses and each of the protrusions are respectively cylindrical, elongated or polygonal. The heat sink according to claim 1, wherein the metal plate is in the form of a sheet, and the metal sheet is made of aluminum, copper or a metal alloy. The heat sink according to claim 1, wherein the at least one convex portion and the at least one concave portion respectively have a stepped structure. The heat sink of claim 1, wherein the metal sheet surface is coated with at least one layer of heat dissipating material. The heat sink of claim 1, wherein the thickness of the heat exchanger sheet body is greater than the height of the convex portion. The heat sink according to claim 1, wherein the thickness of the heat sink sheet body is less than the height of the protrusion portion and then the thickness of the heat exchanger sheet body is between 10 and 50%.