TWI426859B - Heat dissipation module, flat heat column thereof and manufacturing method for flat heat column - Google Patents

Description

Heat dissipation module, temperature equalizing element and manufacturing method of temperature equalizing element

The invention relates to a heat dissipation module, in particular to a heat dissipation module with a capillary structure and a flow guiding element disposed inside the hollow body.

With the development of technology, the number of transistors per unit area of electronic components is increasing, causing an increase in the amount of heat generated during use. Since the heat pipe is a simple but extremely effective heat sink, it has been widely used in various electronic heat sink products. The working principle is to transfer energy by the latent heat of the phase change between the working fluid gas and the liquid phase. In the evaporation section, the working fluid takes a large amount of heat energy from the heat source by the latent heat of evaporation and condenses in the condensation section. The liquid releases heat, and the working fluid flows back to the evaporation section by the capillary force provided by the wick to perform a phase change cycle, continuously transferring the heat energy from the heat source to the distant place.

The temperature equalizing plate is a kind of heat pipe. Since the traditional temperature equalizing plate is mainly welded by the upper and lower plates, not only the welding path is long, but the welding reliability is low, and the capillary structure of the upper and lower plates cannot be continuous, and the contact can only be achieved. The way to connect, causing the capillary force to drop when the working fluid passes, hinders the reflow speed and affects the heat transfer efficiency.

In addition, the traditional method of welding the upper and lower plates is also costly due to the high number of parts and the high degree of mold fixture technology. Due to the limitation of geometry, the capillary structure of the upper and lower plates needs to be individually sintered. A single step is done at the same time. Furthermore, with different lengths of uniform temperature The demand for the board also requires the use of different forming dies and related tools, resulting in a significant increase in equipment costs.

In view of the above problems, an object of the present invention is to provide a temperature equalizing element which is improved in reliability, low in cost, and excellent in heat transfer efficiency, and a method of manufacturing the same.

In order to achieve the above object, the present invention provides a method for manufacturing a temperature equalizing element, comprising the steps of: providing a flat hollow tube body having an inner wall surface covered with a continuous first capillary structure; providing at least one flow guiding An element disposed in the flat hollow tube body and having a second capillary structure on the surface of the flow guiding element; connecting the first capillary structure and the second capillary structure to form a continuous capillary structure; and filling a working fluid and The two ends of the flat hollow tube are sealed.

In order to achieve the above object, the present invention provides a temperature equalizing element comprising a flat hollow tube body, the tube body being integrally formed, and having a continuous first capillary structure on the inner wall surface; at least one diversion flow An element disposed in the flat hollow tube body and having a second capillary structure on the surface of the flow guiding element; and a working fluid disposed inside the sealed flat hollow tube body; wherein the first capillary structure Forming a continuous capillary structure with the second capillary structure.

In order to achieve the above object, the present invention provides a heat dissipation module

According to the manufacturing method of the temperature equalizing element of the present invention, the conventional upper and lower plate method can be replaced by the integral molding method, and not only the bead path is less, the reliability is increased, and the flow guiding element can be disposed at any position and can be combined with the condensation end and the evaporation end. The capillary structure forms a continuous capillary structure that helps the working fluid The capillary force from the condensation end to the evaporation end by the flow guiding element is not interrupted, thereby accelerating the circulating flow of the working fluid, thereby effectively increasing the heat dissipation efficiency, compared with the conventionally having a discontinuous area of capillary structure. The warm plate, according to the structure and manufacturing method of the temperature equalizing element of the invention, can provide a better capillary structure to enable the working fluid to circulate rapidly and increase the heat transfer efficiency.

Moreover, the method for manufacturing the temperature equalizing element of the present invention is to form the outer wall of the temperature equalizing plate by pipe stamping, without complicated forming or expensive materials, and can adjust the length of the temperature equalizing element according to individual needs of different users. Moreover, the mold is cheap and can be shared, and the advantages of the process steps can be simplified. Overall, the method for manufacturing the temperature-sensing element of the present invention has the advantages of easy geometric change and low cost.

The above and other objects, features, and advantages of the present invention will become more apparent and understood.

Hereinafter, the manufacturing method of the temperature equalizing element of the present invention will be described in detail. Please refer to FIG. 1A and FIG. 1B simultaneously. FIGS. 1A and 1B are process diagrams of two kinds of temperature equalizing elements according to the present invention. First, a flat hollow tubular body 2 is provided. For example, the flat hollow tubular body 2 is formed by pressing a circular tubular material 1. The cross-sectional shape of the flat hollow tubular body 2 is polygonal and long. The shape of the tube is, for example, aluminum, copper, titanium, molybdenum or other metal having a high thermal conductivity. Here, it must be noted that the flat hollow body 2 is in addition to the round tube 1 The flat-type hollow tubular body 2 can be directly formed by a press method in addition to being formed by a press method.

The inside of the flat hollow tubular body 2 is sintered, and one continuous first capillary structure 4 is formed on the inner wall of the flat hollow tubular body 2, wherein the first capillary structure 4 is a metal spring shape. A grooved, columnar, mesh or porous structure formed of metal powder. Then, according to the requirements of the actual product, a boss 3 can be formed on one side of the flat hollow tube body 2 by stamping (as shown in FIG. 1B), and the surface of the boss 3 is a temperature equalizing element. The bottom surface is used to contact the heat source. Alternatively, the flat hollow body may be provided without contacting the boss 3 as shown in FIG. 1A.

Next, at least one flow guiding member 5 is provided, a second capillary structure 6 is formed on the surface thereof by a sintering method, and the sintered flow guiding member 5 is placed in the flat hollow tubular body 2 for the second sintering. The first capillary structure 4 is coupled with the second capillary structure 6 on the flow guiding element 5 to form a continuous capillary structure; after that, the water injection pipe 7 is inserted into the side wall of the flat pipe body, and then the flat hollow pipe body 2 is The ends and the water injection pipe 7 are sealed at the joint of the flat hollow pipe body 2, and the sealing method is sealed by welding, welding or the like. After sealing, a working fluid is filled in the flat hollow tubular body 2 from the water injection pipe 7, and the working fluid is, for example, an inorganic compound, water, an alkane, an alcohol, a liquid metal, a ketone, a cold coal or an organic compound. Finally, the flat-type hollow pipe body 7 is evacuated from the water injection pipe 7 to remove non-condensable gas (NCG), and the water injection pipe 7 is sealed, so that the production of the temperature equalizing elements 11A, 11B of the present invention can be completed.

Figure 2 is an A-A' section of the first temperature diagram in which the temperature equalizing element is inverted. schematic diagram. The same or equivalent elements in the various embodiments are denoted by the same reference numerals. Referring to FIGS. 1A and 2 simultaneously, the temperature equalizing element 11A includes a flat hollow body 2, at least one flow guiding element 5, and a working fluid W. The tubular body of the flat hollow tubular body 2 is integrally formed, and a continuous first capillary structure 4 is covered on the inner wall surface. The flow guiding element 5 is disposed in the flat hollow tubular body 2 and has a second capillary structure 6 on the surface of the flow guiding element 5. The working fluid W is disposed inside the sealed flat hollow body 2 . Wherein, the first capillary structure 4 and the second capillary structure 6 form a continuous capillary structure. In addition to supporting the two flat plates of the temperature equalizing element 11A up and down, the flow guiding element 5 can increase the reflow rate of the working fluid W and improve the heat dissipation efficiency. For the components with the same reference numerals, the remaining features or detailed descriptions have been described in detail above, and therefore will not be further described herein.

It must be particularly noted here that the flow guiding element 5 can be a solid cylinder and the second capillary structure is coated on the surface of the solid cylinder, as shown in FIG. 1A. Alternatively, the flow guiding member 5 and the second capillary structure 6 may be integrally formed of the same material, for example, a metal spring shape, a mesh shape, or a porous structure formed of metal powder particles, as shown in FIG.

Fig. 3 is a schematic cross-sectional view of the B-B' after the temperature equalizing element is inverted in Fig. 1B. Fig. 4 is a schematic cross-sectional view showing the C-C' of the inverted temperature element in Fig. 1B. The same or equivalent elements in the various embodiments are denoted by the same reference numerals. Referring to FIG. 1B, FIG. 3 and FIG. 4 simultaneously, the temperature equalizing element 11B includes a flat hollow body 2, at least one flow guiding element 5, and a working fluid W. The flat hollow tube body 2 has at least one boss 3, and the flat hollow tube body 2 is integrally formed, and a continuous first capillary structure 4 is covered on the inner wall surface. The flow guiding element 5 is arranged on the flat plate The hollow tube body 2 has a second capillary structure 6 on the surface of the flow guiding element 5. The working fluid W is disposed inside the sealed flat hollow body 2 . Wherein, the first capillary structure 4 and the second capillary structure 6 form a continuous capillary structure. In addition to supporting the two flat plates of the temperature equalizing element 11B up and down, the flow guiding element 5 can increase the reflow rate of the working fluid W and improve the heat dissipation efficiency. For the components with the same reference numerals, the remaining features or detailed descriptions have been described in detail above, and therefore will not be further described herein.

It must be particularly noted here that the flow guiding element 5 can be a solid cylinder and the second capillary structure is coated on the surface of the solid cylinder, as shown in FIG. 1B. Alternatively, the flow guiding element 5 and the second capillary structure 6 may be integrally formed of the same material, for example, a metal spring shape, a mesh shape or a porous structure formed of metal powder particles, as shown in FIGS. 3 and 4 . In addition, referring to FIG. 4, the inner side of the edge seal 13 of the flat hollow tubular body 2 may further include at least one support member 24 (for example, a high thermal conductive bar or sintered from copper powder). The support member) enables the flat hollow tubular body 2 to be kept flat when sealed at both ends.

Please refer to Figures 5A and 5C again. As shown in FIG. 5A, the heat dissipation module 10 includes a heat dissipation fin 40, a temperature equalizing element 11 and a fixing plate 50. The temperature equalizing element 11 is exemplified by the temperature equalizing element 11B in FIG. The fixing plate 50 includes a bottom plate 51, at least two side plates 52, and at least two connecting plates 53. The bottom plate 51 and the side plates 52 form an accommodating space 55 for accommodating the temperature grading component 11 and the fixing plate The bottom plate 51 of the 50 has an opening 54 for receiving the boss 3 as shown in FIG. 6B; or the opening 54 can accommodate a portion of the temperature equalizing element 11 and the boss 22, as shown in FIG. Show. The heat dissipation fin 40 is connected to the temperature equalization The opposite side of the boss 22 of the component 11 is fixed to the connecting plate 53, so that the temperature equalizing element is stabilized by the holding of the heat radiating fin and the fixing plate.

Referring to FIG. 6 again, the heat dissipation module 10 includes a heat dissipation fin 40, a temperature equalizing element 11 and a fixing plate 50. The temperature equalizing element 11 is a sealed flat hollow tube body and is filled with a working fluid. The temperature equalizing element 11 has at least one flow guiding element formed therein and connected to the opposite inner wall surface, so that the working fluid can be recirculated by the flow guiding element. At least two fixing plates 60 having a bottom plate 61 and a side plate 62, the two fixing plates 60 are oppositely disposed on both sides of the temperature equalizing element 11, and the side plates 62 abut against and clamp the temperature equalizing element 11; A heat dissipation fin 40 is connected to the opposite side of the boss 22 of the temperature equalizing element 11 and is fixed to the bottom plate 61.

According to the manufacturing method of the temperature equalizing element of the present invention, the conventional upper and lower plate method can be replaced by the integral molding method, and not only the bead path is less, the reliability is increased, and the flow guiding element can be disposed at any position and can be combined with the condensation end and the evaporation end. The capillary structure forms a continuous capillary structure, which helps the working fluid to flow back from the condensation end by the flow guiding element to the evaporation end without interrupting, thereby accelerating the circulating flow of the working fluid, thereby effectively increasing the heat dissipation efficiency. It is known that a temperature equalizing plate having a discontinuous region of capillary structure, according to the structure and manufacturing method of the temperature equalizing element of the present invention, can provide a better capillary structure for rapid circulation of the working fluid and increase heat transfer efficiency.

Moreover, the method for manufacturing the temperature equalizing element of the present invention is to form the outer wall of the temperature equalizing plate by pipe punching, without complicated forming method or expensive material, and can adjust the temperature equalizing element according to individual needs of different users. Length, and the mold is cheap and can be shared, which can simplify the process steps Advantages As a whole, the method for manufacturing a temperature-sensing element of the present invention has the advantages of easy change in geometry and low cost.

The above is only the preferred embodiment of the present invention, and the above-described embodiments are intended to be illustrative only and not to limit the scope of the invention, which is defined by the following claims. Variations and modifications made within the scope of the invention as claimed should be within the scope of the invention.

1‧‧‧round pipe

10‧‧‧ Thermal Module

11, 11A, 11B‧‧‧ equal temperature cavity

2‧‧‧ Flat hollow body

24‧‧‧Support

3‧‧‧Boss

4‧‧‧First capillary structure

40‧‧‧ Heat sink fins

5‧‧‧Flow elements

50, 60‧‧‧ fixed plate

51, 61‧‧‧ bottom plate

52, 62‧‧‧ side panels

53‧‧‧Connecting plate

54‧‧‧Opening

55‧‧‧ accommodating space

6‧‧‧Second capillary structure

7‧‧‧Water injection pipe

1A and 1B are process diagrams of two temperature equalizing elements in accordance with the present invention.

Fig. 2 is a schematic cross-sectional view showing the A-A' after the temperature equalizing element is inverted in Fig. 1A.

Fig. 3 is a schematic cross-sectional view of the B-B' after the temperature equalizing element is inverted in Fig. 1B.

Fig. 4 is a schematic cross-sectional view showing the C-C' of the inverted temperature element in Fig. 1B.

Figure 5A is an exploded view of the heat dissipation module of the present invention.

FIG. 5B is a schematic view of the first embodiment of the heat dissipation module of the present invention.

Figure 5C is a schematic view of a second embodiment of the heat dissipation module of the present invention.

Figure 6 is a schematic view showing a third embodiment of the heat dissipation module of the present invention.

1‧‧‧round pipe

2‧‧‧ Flat hollow body

3‧‧‧Boss

4‧‧‧First capillary structure

5‧‧‧Flow elements

6‧‧‧Second capillary structure

7‧‧‧Water injection pipe

Claims (50)

A method for manufacturing a temperature equalizing element, comprising: providing a flat hollow tube body, wherein an inner wall surface is covered with a continuous first capillary structure; at least one flow guiding member is disposed, and the flat hollow tube is disposed The surface of the flow guiding element has a second capillary structure, wherein the flow guiding element is a solid cylinder, and the second capillary structure is coated on the surface of the solid cylinder; connecting the first capillary structure and the first The second capillary structure forms a continuous capillary structure; and a working fluid is filled and the two ends of the flat hollow body are sealed. A method for manufacturing a temperature equalizing element, comprising: providing a flat hollow tube body, wherein an inner wall surface is covered with a continuous first capillary structure; at least one flow guiding member is disposed, and the flat hollow tube is disposed The surface of the flow guiding element has a second capillary structure, wherein the flow guiding element and the second capillary structure are integrally formed of the same material; the first capillary structure and the second capillary structure are connected to form a continuous capillary structure; And filling a working fluid and sealing the two ends of the flat hollow tube. The method for producing a temperature equalizing element according to claim 1 or 2, wherein the flat hollow tube system is formed by integrally forming one of the tubes by pressing. The method of manufacturing a temperature equalizing element according to claim 3, wherein the pipe is a circular pipe. The method for producing a temperature equalizing element according to claim 1 or 2, wherein the flat hollow tube system is directly formed by stamping. The manufacturing method of the temperature equalizing element according to claim 1 or 2, wherein at least one boss is formed on one side of the flat hollow tube. The method of manufacturing a temperature equalizing element according to claim 1 or 2, wherein the continuous capillary structure connects the first capillary structure and the second capillary structure by a sintering method. The method for producing a temperature equalizing element according to claim 1 or 2, wherein the first capillary structure is a metal spring shape, a mesh shape or a porous structure formed of metal powder particles. The method for manufacturing a temperature equalizing element according to claim 2, wherein the flow guiding element and the second capillary structure are a metal spring shape, a mesh shape or a porous structure formed of metal powder particles. The method for manufacturing a temperature equalizing element according to claim 1 or 2, wherein the flat hollow tube is made of aluminum, copper, titanium, molybdenum or other metal having a high thermal conductivity. The manufacturing method of the temperature equalizing element according to the first or second aspect of the invention, wherein the flat hollow tubular body has a polygonal cross section, a long elliptical shape or a long circular arc shape. The method for manufacturing a temperature equalizing element according to claim 1 or 2, wherein a side of the flat hollow body is further inserted with a note The water pipe is such that the workflow system is filled into the interior of the temperature equalizing element by the water injection pipe. The method for producing a temperature equalizing element according to claim 1 or 2, wherein the working fluid is an inorganic compound, water, an alkane, an alcohol, a liquid metal, a ketone, a cold coal or an organic compound. The method for producing a temperature equalizing element according to claim 1 or 2, wherein the flat end of the flat hollow tube is sealed by welding, welding or the like. The method for manufacturing a temperature equalizing element according to claim 1 or 2, wherein at least one support member is further disposed inside the flat hollow tube body, so that the flat hollow tube body is sealed at both ends It can be kept flat. The method for manufacturing a temperature equalizing element according to claim 15, wherein the support member is a high thermal conductivity bar or sintered from copper powder. A temperature equalizing element comprises: a flat hollow tube body, wherein the tube body is integrally formed, and the inner wall surface is covered with a continuous first capillary structure; at least one flow guiding element is disposed on the flat hollow The inside of the tube body and having a second capillary structure on the surface of the flow guiding element, wherein the flow guiding element is a solid cylinder, and the second capillary structure is coated on the surface of the solid cylinder; and a working fluid is disposed on the The inside of the flat hollow body after sealing; wherein the first capillary structure and the second capillary structure form a continuous capillary structure. A temperature equalizing element comprises: a flat hollow tube body, wherein the tube body is integrally formed, and the inner wall surface is covered with a continuous first capillary structure; at least one flow guiding element is disposed on the flat hollow The inside of the tube body and the surface of the flow guiding element has a second capillary structure, wherein the flow guiding element and the second capillary structure are integrally formed of the same material; and a working fluid is disposed inside the flat hollow body after sealing Wherein the first capillary structure and the second capillary structure form a continuous capillary structure. The temperature equalizing element according to claim 17 or 18, wherein the flat hollow tube system is formed by integrally forming one of the tubes by stamping. The temperature equalizing element according to claim 19, wherein the pipe is a circular pipe. The temperature equalizing element of claim 17 or 18, wherein the flat hollow tube system is directly formed by stamping. The temperature equalizing element according to claim 17 or 18, wherein one side of the flat hollow body is further formed with at least one boss. The temperature equalizing element according to claim 17 or 18, wherein the continuous capillary structure connects the first capillary structure and the second capillary structure by means of sintering. The temperature equalizing element according to claim 17 or 18, wherein the first capillary structure is a metal spring shape, a mesh shape or a porous structure formed of metal powder particles. The temperature equalizing element according to claim 18, wherein the flow guiding element and the second capillary structure are a metal spring shape, a mesh shape or a porous structure formed of metal powder particles. The temperature equalizing element according to claim 17 or 18, wherein the flat hollow body is made of aluminum, copper, titanium, molybdenum or other metal having a high thermal conductivity. The temperature equalizing element according to claim 17 or 18, wherein the flat hollow tubular body has a polygonal shape, a long elliptical shape or a long circular arc shape. The temperature equalizing element according to claim 17 or 18, wherein a water injection pipe is further inserted into a side wall of the flat hollow pipe body, so that the working flow system is filled to the temperature equalizing element by the water injection pipe. internal. The temperature equalizing element according to claim 17 or 18, wherein the working fluid is an inorganic compound, water, an alkane, an alcohol, a liquid metal, a ketone, a cold coal or an organic compound. The temperature equalizing element according to claim 17 or 18, wherein the flat hollow body is sealed at both ends by welding, welding or the like. The temperature equalizing element according to claim 17 or 18, wherein at least one supporting member is further disposed inside the flat hollow tube body, so that the flat hollow tube body can be kept at the both ends when sealed smooth. The temperature equalizing element according to claim 31, wherein the supporting member is a high thermal conductivity bar or sintered from copper powder. A heat dissipation module comprising: a temperature equalizing element, comprising: a flat hollow tube body, wherein the tube body is integrally formed, and the inner wall surface is covered with a continuous first capillary structure; at least one flow guiding element, And the working fluid is disposed inside the sealed hollow tubular body; wherein the first capillary structure and the The second capillary structure forms a continuous capillary structure; a fixed plate has a bottom plate, at least two side plates and at least two connecting plates, and the bottom plate and the side plates form an accommodating space for accommodating the temperature grading component, The bottom plate has an opening for receiving the boss; and a heat dissipating fin connected to the opposite side of the boss of the temperature equalizing element and fixed to the connecting plate. A heat dissipation module comprising: a temperature equalizing element comprising: a flat hollow tube body, wherein the tube body is integrally formed, and the inner wall surface is covered with a continuous first capillary structure; at least one diversion flow An element disposed in the flat hollow tube body and having a second capillary structure on the surface of the flow guiding element; and a working fluid disposed inside the sealed flat hollow tube body; wherein the first capillary structure Forming a continuous capillary structure with the second capillary structure; at least two fixing plates, the fixing plate has a bottom plate and a side plate, and the two fixing plates are oppositely disposed on both sides of the temperature equalizing element, and the side plates abut and clamp The temperature equalizing element; and a heat dissipating fin connected to the opposite side of the boss of the temperature equalizing element and fixed to the bottom plate. The heat dissipation module of claim 33, wherein the flat hollow tube system is formed by integrally forming one of the tubes by stamping. The heat dissipation module of claim 35, wherein the pipe is a circular pipe. The heat dissipation module of claim 33, wherein the one side of the flat hollow body is further formed with at least one boss. The heat dissipation module of claim 33, wherein the flat hollow tube system is directly formed by stamping. The heat dissipation module of claim 33, wherein the continuous capillary structure connects the first capillary structure and the second capillary structure by sintering. The heat dissipation module according to claim 33, wherein the first capillary structure is a metal spring shape, a mesh shape or a porous structure formed of metal powder particles. The heat dissipation module of claim 33, wherein the flow guiding element is a solid cylinder, and the second capillary structure is coated on the surface of the solid cylinder. The heat dissipation module of claim 33, wherein the flow guiding element and the second capillary structure are integrally formed of the same material. The heat dissipation module according to claim 41, wherein the The flow guiding element and the second capillary structure are a metal spring shape, a mesh shape or a porous structure formed of metal powder particles. The heat dissipation module of claim 33, wherein the flat hollow body is made of aluminum, copper, titanium, molybdenum or other metal having a high thermal conductivity. The heat dissipation module of claim 33, wherein the flat hollow tube has a polygonal shape, a long elliptical shape or a long circular arc shape. The heat dissipation module of claim 33, wherein a water injection pipe is further inserted into a sidewall of the flat hollow pipe body, so that the workflow system is filled to the temperature equalization component by the water injection pipe. internal. The heat dissipation module according to claim 33, wherein the working fluid is an inorganic compound, water, an alkane, an alcohol, a liquid metal, a ketone, a cold coal or an organic compound. The heat dissipation module of claim 33, wherein the flat end of the flat hollow body is sealed by welding, welding or the like. The heat dissipation module of claim 33, wherein the flat hollow tube body is further provided with at least one support member, so that the flat hollow tube body can be kept at the both ends when sealed. smooth. The heat dissipation module of claim 49, wherein the support member is a high thermal conductivity bar or sintered from copper powder.