CN1125390C - Heat radiator and its assembly mode - Google Patents

Abstract

A heat dissipation device and its assembly method, including the steps of first forming, punching, second forming, combining and cutting, relying on the first forming to integrally produce a raw material strip with a heat dissipation base and rows of blades, and then in each Several assembly holes are punched out at the bottom of the groove between the blades, and rows of sub-blades corresponding to the assembly holes of the raw material strips are produced through the second molding. The sub-blades are successively interference-fitted on the assembly holes and properly extended between the blades. Finally, the finished product is made by cutting. Because the heat dissipation area is increased, the heat dissipation performance is better.

Description

A cooling device and its assembly method

The invention relates to a cooling device and its assembly method, in particular to a cooling device assembly method in which several rows of sub-blades are directly added between the blades of the cooling device to double the cooling surface area and cooling efficiency.

With the rapid development of the computer industry, in order to process increasingly large databases, pictures and images at a faster speed, it is necessary to continuously increase the computing speed of the computer's central processing unit chip. However, with the acceleration of the calculation speed of the central processing unit chip, it will inevitably generate quite high heat, and some chips can even generate more than 40 watts of heat. Such heat generation will be very detrimental to the stability and quality of telecommunication transmission. Therefore, it is necessary to design a cooling device with fast heat transfer and cooling speed to cooperate with the use of fans to assist the central processing unit to dissipate unnecessary heat. For the structure of the existing heat dissipation device, reference may be made to US Patent Nos. 4,712,159, 4,879,891, and Chinese Taiwan Patents No. 84212747, 85200861, and 85206293. The cooling devices of these patents are mainly provided with a cooling panel with an area approximately equal to the upper surface of the central processing unit, and are integrally provided with rows of blades on one side of the cooling panel, so that the heat dissipation of the central processing unit can be transferred to the central processing unit by means of the cooling panel. out, and then dissipate its heat into the air through the blades. However, the above design not only fails to effectively meet the actual heat dissipation needs of the current central processing unit, but also often generates many problems during manufacture. The biggest problem comes from how to effectively expand the heat dissipation surface area of the heat sink. Generally speaking, the more blades are set, the more When the relative ratio of its extension height to width is larger (that is, the blade is thinner and higher), the overall heat dissipation surface area of the heat sink can be appropriately increased. However, under the technical limitation of extrusion molding, the width of the blade is not It may be too thin, that is, the number of blades cannot be increased, thus limiting the heat dissipation capability of the heat sink.

In order to solve the above problems, U.S. Nos. 4,890,196, 5,038,858 and Taiwan Patent No. 83212791 propose the concept of separately manufacturing the heat dissipation panel and the blades of the heat dissipation device and then assembling them into one body, as shown in Fig. 8A and Fig. 8B, which is U.S. No. 5,038,858 Patented structure, it is mainly provided with a number of assembly grooves 711 on the heat dissipation panel 71 of the heat dissipation device 7, and buckle edges 712 are formed on the groove side walls of these assembly grooves 711, and the blades 72 are inserted on the bottom side. A plurality of protruding blocks 721 are correspondingly provided near the connecting edge, and then when the blade 72 is inserted into the assembling groove 711 , these protruding blocks 721 are fitted on the buckle edge 712 to be fixed. As shown in FIG. 9 , the fins 82 are sequentially joined to the heat dissipation panel 81 by welding to form the heat dissipation device 8 . Although the existing method can assemble more blades on the heat dissipation panel, and change the ratio of width and height of the blades to increase its surface area, it must be assembled on the heat dissipation panel one by one during manufacture, and a suitable medium is required. Fixing the two together (such as using solder or bumps) complicates the manufacturing process and takes a lot of time and cost, which is not conducive to mass production. At the same time, the heat dissipation surface area that can be increased is still quite limited.

The main purpose of the present invention is to provide a heat dissipation device and its assembly method which can increase the heat dissipation area several times.

Another object is to manufacture the heat sink with low cost and simplified procedures.

The purpose of the present invention is achieved by providing a heat dissipation device, comprising: a heat dissipation base placed on the central processing unit; an assembly hole provided through the heat dissipation base; The sub-blades stamped by the material strip can be interference-fitted in the joint hole after being fully inserted into the corresponding joint hole, so as to extend and protrude on the other side of the heat dissipation base that is not abutted against the central processing unit and increase the The overall heat dissipation surface area of a heat sink. The assembly method includes the steps of first forming, punching, second forming, bonding, and cutting. The first forming step is used to integrally produce a raw material strip with a heat dissipation base and rows of blades, and then the grooves between the blades After setting several joint holes in the bottom punch, the rows of sub-blades produced in the second molding step can be sequentially interference-fitted on the corresponding joint holes and properly extended between the blades of the heat sink, and then cut Cutting operations to produce finished products.

Compared with the prior art, the present invention has the following advantages: 1. Effectively improve the heat dissipation efficiency of the heat dissipation device and maintain the normal operation of the central processing unit. 2. Suitable for mass production. 3. The heat dissipation performance of the original heat dissipation device can be improved while saving costs and reducing process steps.

Below in conjunction with embodiment, the utility model is further described with reference to accompanying drawing:

FIG. 1A is an exploded perspective view of the combination relationship between the heat sink and sub-blades of the present invention.

FIG. 1B is a top view of the assembled sub-blades of the heat sink of the present invention.

Fig. 1C is a schematic partial top view of two rows of sub-blades simultaneously produced on the tape according to the present invention.

Fig. 2 is a flow chart of manufacturing and assembling the heat sink of the present invention.

FIG. 3 is an exploded perspective view of the second embodiment of the heat sink of the present invention.

Fig. 4 is a flow chart of manufacturing and assembling the second embodiment of the heat sink of the present invention. FIG. 5 is an exploded perspective view of a third embodiment of the heat sink of the present invention.

FIG. 6 is a schematic diagram of the implementation of the assembly method of the present invention applied to an existing heat dissipation device.

FIG. 7 is a schematic diagram of the implementation of the assembly method of the present invention applied to another existing heat dissipation device.

Fig. 8A is a schematic cross-sectional detailed view of a plug-in assembly blade in a conventional structure.

Fig. 8B is a partial cross-sectional detailed view near the joint groove of the existing structure.

Fig. 9 is a schematic cross-sectional detailed view of blades assembled by means of welding in an existing structure.

As shown in Figures 1A and 1B, the main structure of the cooling device 1 includes a cooling base 11 placed on the central processing unit (not shown) to absorb and conduct the heat generated by the processor, from the side surface of the cooling base 11 The rows of blades 12 that are integrally extended form grooves 13 between the blades 12 to provide air circulation space, so the heat generated by the central processing unit can be conducted to each blade 12 through the heat dissipation base 11, and rely on the blades. The two side surfaces of 12 are in contact with the air in the groove 13 so that the heat is transferred to the air, and then the heat is dissipated by air convection. Rows of assembly holes 14 are provided on the heat dissipation base 11 at the bottom of each groove 13 , and each row of assembly holes 14 can be correspondingly assembled with a group of sub-blades 22 . These sub-blades 22 are made by stamping the material strip 2 (as shown in Figure 1C), they are evenly distributed on the central part of the material strip 2, and are arranged in a staggered manner and integrally connected to the both sides of the material strip 2. On the guide belt 21 with guiding effect. The width of the bottom section of each sub-blade 22 close to the guide belt 21 is slightly wider than the diameter of the assembly hole 14, so the two sets of sub-blades 22 staggered on the strip 2 together with the opposite guide belt 21 are broken and separated. And when correspondingly plugged in each row of group joint holes 14, it can be fixed in the group joint holes 14 by virtue of the interference fit of its wider bottom section. At the same time, after the assembly is completed, the guide strip 21 is broken and removed from the bottom section of the sub-blades 22, so that a row of sub-blades 22 can be added in each groove 13 of the heat sink 1 to effectively increase the heat dissipation area of the original blades 12. , so that the cooling effect of the cooling device is better.

Referring to Fig. 2, the flow process of the present invention to manufacture the above-mentioned heat sink includes the following steps:

1. The first molding step 30:

Firstly, aluminum ingot raw materials (or other materials with good heat conduction) are used to form a raw material bar (not shown) including the heat dissipation base 11 and the rows of blades 12 directly by means of extrusion molding.

2. Punching step 31:

After making the raw material strip comprising the cooling base 11 and the rows of blades 12, rows of assembly holes 14 can be punched out on the cooling base 11 at the bottom of the groove 13 between the blades 12 by means of punching.

3. The second molding step (Molding) 32:

While manufacturing the heat dissipation base 11 and blades 12, a number of sub-blades 22 are produced on the long strip 2 by means of stamping. For the convenience of assembly and material saving, the sub-blades 22 can be staggered and connected in advance. On the guide belts 21 provided on both sides of the aforementioned material strip 2 .

4. Combining step 33:

The rows of sub-blades 22 connected on the guide belt 21 are respectively guided and aligned with the rows of assembly holes 14 punched at the bottom of the groove 13 of the raw material strip, and then each sub-blade 22 is separated from the heat dissipation base 11. The bottom sides are inserted into the assembly hole 14 one by one and protrude in the groove 13 , and are fixed by the interference fit of the wider bottom section of each sub-blade 22 in the assembly hole 14 .

Five. Cutting step 34:

After the combination of the raw material strip and each sub-blade 22 is completed, the redundant guide belt 21 connected to the bottom side of the sub-blade 22 can be broken off and removed, and then cut at the appropriate position of the raw material strip according to the specifications and sizes required by the cooling device 1. cut homework.

Six. Finished product 35:

The finished product of the heat sink 1 can be obtained by cutting the raw material strip at appropriate lengths.

As mentioned above, the present invention can effectively increase the heat dissipation surface area of the cooling device 1 (i.e. the surface area of the sub-blades) in the most time-saving and cost-effective situation, so that the heat dissipation effect of these cooling devices 1 is good, so as to solve the heat dissipation problem of the current central processing unit. question.

Referring to Fig. 3, the present invention relies on arranging sub-blades to increase the heat dissipation surface area, which can be further applied to a heat dissipation device 1' with split groove blades 12', wherein the heat dissipation device is mainly provided with a central processing unit. The heat dissipation base 11' and the rows of blades 12' protruding from the other side of the heat dissipation base 11', and the bottom of the groove 13' formed between the blades 12' are also punched with several assembly holes. 14' to be combined with the corresponding subblades 22. In addition, a number of grooves 16' perpendicular to the direction of the groove 13' are cut on each blade 12', and the grooves 16' are set to cooperate with the sub-blades 22 to further increase the original surface area of the blades 12', so that the cooling device 1' The overall cooling effect is better. And at least one of the grooves 16' provided on each blade 12' has a width wider than the others to form a fixed groove 15', the fixed groove 15' is for assembly (not shown) The cooling device 1' and the central processing unit (not shown) are accommodated therein and assembled into a module.

Referring to Fig. 4, the present invention manufactures the cooling device as shown in Fig. 3 according to the following steps:

1. The first molding step 40:

Firstly, aluminum ingot raw materials (or other materials with good heat conduction) are used to form a raw material strip including the heat dissipation base 11' and the rows of blades 12' directly by means of extrusion molding.

2. Trench step 41:

After the raw material strip comprising the heat dissipation base 11' and the rows of blades 12' is produced, a suitable clamping mechanism (not shown) can be used to cut several grooves 16' and At least one fastening channel 15'.

3. Punching step 42:

After the trenching is completed, rows of connection holes 14' are respectively punched out on the heat dissipation base 11' at the bottom of the groove 13' between the blades 12' by means of punching.

Four. The second molding step 43:

While manufacturing the heat dissipation base 11 ′ and the vanes 12 ′, the sub-vanes 22 connected to the guide belt 21 can also be produced on the long strip 2 by stamping.

Five. Combining step 44:

The sub-blades 22 connected on the guide belt 21 are respectively guided and aligned with the rows of joint holes 14' at the bottom of the raw material strip groove 13', and then the sub-blades 22 are moved from the bottom side of the heat dissipation base 11' one by one. It is inserted into the assembly hole 14' and exposed in the groove 13', and is fixed by the interference fit of the wider bottom section of each sub-blade 22 in the assembly hole 14'.

Six. Cutting step 45:

After the combination of the raw material strip and the sub-blade 22 is completed, the redundant guide belt 21 connected to the bottom side of the sub-blade 22 can be broken off and removed, and then cut at the appropriate position of the raw material strip according to the required size of the cooling device 1′. cut processing.

Seven. Finished product 46:

The finished product of the cooling device 1' can be obtained by cutting the raw material strip at appropriate lengths.

Referring to Fig. 5, it is the third embodiment of the present invention. It can rely on the extrusion molding method to produce a flat plate heat dissipation base 11 ", and the positions where the blades should be arranged on the heat dissipation base 11 " and the gaps between these positions are respectively Punch out a row of connecting holes 14 ", according to the above-mentioned assembly method, sequentially plug in each row of connecting holes 14 " and interference fit the sub-blades 22 , so that the same heat dissipation performance as the second embodiment can also be produced Heat sink 1″.

As shown in Fig. 6, the blade assembly method of the present invention is used in conjunction with the existing heat sink 5. The heat sink is provided with a heat dissipation base 51 and several blades 52, and on the surface of one side of the heat dissipation base 51, a number of combined The groove 511 , each blade 52 relies on the projection 521 provided on the bottom side thereof to match with the buckle edge 512 correspondingly provided in the combination groove 511 to combine with the heat dissipation base 51 to form the heat dissipation device 5 . When applying the assembling method of the present invention on this existing heat dissipation device 5, the assembly holes 53 in rows can be respectively punched out on the heat dissipation base 51 between the two blades 52, and then the sub-blades made of the strip 2 can be punched out. 22 is inserted and fixed on the group connection holes 53 by being guided by the guide belt 21, so that several rows of sub-blades 22 can be added between each blade 52 to effectively increase the heat dissipation performance of the existing heat dissipation device 5.

Referring to Fig. 6, the blade assembly method of the present invention is used in conjunction with another conventional heat sink 6. As shown in the figure, the heat sink 6 is mainly provided with a heat dissipation base 61, and on the side surface of the heat dissipation base 61, an appropriate assembly is used. The connecting mechanism is assembled with several rows of blades 62 folded and extruded by sheet metal. Therefore, the connecting holes 63 are respectively punched out at the gap positions of each row of blades, and then the materials are inserted into the connecting holes 63. With the sub-blades 22 produced by the belt 2, several rows of sub-blades 22 can be added on the cooling device 6 to effectively improve the original heat dissipation performance.

Claims (11)

1. A cooling device, which is used to be assembled on the central processing unit to conduct and dissipate the heat generated by the central processing unit, comprising: a heat dissipation base resting on the central processing unit, on which several blades are arranged; The assembly holes arranged on the heat dissipation base; it is characterized in that: on the bottom of the groove between the blades of the heat dissipation base, there are rows of assembly holes, and sub-blades are arranged corresponding to the assembly holes of the heat dissipation base, and the sub-blades The interference fits in the corresponding assembly hole, and extends and protrudes on the other side of the heat dissipation base that is not abutted against the central processing unit. 2 . The heat dissipation device according to claim 1 , wherein a plurality of rows of blades can be integrally protruded on the side surface of the heat dissipation base of the heat dissipation device that is not placed against the central processing unit. 3 . 3. The heat dissipation device according to claim 1 or 2, wherein the width of one end of the sub-blade is wider than the hole diameter of the assembly hole, and can form an interference fit with it when inserted into the assembly hole. 4. The heat dissipation device according to claim 3, wherein several grooves can be further cut on the blades of the heat dissipation device. 5 . The heat dissipation device according to claim 4 , wherein the grooves cut on each blade further include at least one fixed groove, and the fixed groove has a larger groove width than other grooves. 6 . 6. An assembly method of a heat sink, used to manufacture a heat sink, is characterized in that: the assembly method at least includes, the first forming step is to use a heat conducting material to make a raw material strip at least including a heat dissipation base; punching step , is to punch out a row of assembly holes on the heat dissipation base of the raw material strip and run through the heat dissipation base; the second forming step is to stamp and form a number of sub-blades on the long strip formed by the heat-conducting material, and The sub-blades are integrally connected to the guide belt on the side of the material belt to facilitate the guiding and assembly; the combining step is to guide the rows of sub-blades so that they are sequentially connected to the side of the central processing unit from the heat dissipation base and plugged in In the corresponding assembly holes, and relying on the interference fit of the last inserted part of the sub-blade in these assembly holes, so that the earlier inserted part protrudes and extends on the surface of the heat dissipation base; the cutting step is in the assembly The raw material strip connected with the sub-blades is cut at an appropriate position to produce a cooling device of a certain size. 7 . The assembly method of the heat sink as claimed in claim 6 , wherein the thermally conductive material used for extrusion molding to form the raw material bar is aluminum or other materials that are easy to process and have good thermal conductivity. 8 . 8. The method for assembling blades of a cooling device according to claim 7, wherein, while extruding the heat dissipation base of the raw material strip in the first molding step, the heat dissipation base can be further formed when the heat dissipation base is not in contact with the central processing unit. Several rows of blades are integrally protruded on one side. 9 . The method of assembling blades of a heat sink according to claim 8 , wherein the assembly holes punched out on the heat dissipation base of the raw material strips are located at the bottom of grooves formed between the blades. 10 . 10. The method for assembling blades of a heat sink according to claim 6 or 9, wherein the second forming step is to integrally connect the bottom sections of each sub-blade to the On the guide belt that is punched out on both sides of the strip. 11. The method for assembling blades of a heat sink according to claim 10, wherein a step of cutting grooves can be further carried out between the first forming step and the punching step, the step is to cut the blades at the proper position of the raw material strip Cut through several grooves.

Images