TWM629434U - Structure of heat-dissipating module - Google Patents

Abstract

A heat dissipation module structure includes an aluminum base with an upper side and a lower side, at least one L-shaped copper heat pipe, a first aluminum fin group, a second aluminum fin group, and at least one a copper intercalation layer; wherein the copper heat pipe has a heat absorption part and a heat dissipation part, the heat absorption part is combined with the aluminum base, and the heat dissipation part is combined with the second aluminum fin set, and the aluminum The upper side of the base is provided with a junction where the first aluminum fin group and the heat absorbing portion of the copper heat pipe are combined and a junction where the first aluminum fin group is used to combine with the aluminum base. With the copper insertion layer, the aluminum base, the first aluminum fin group and the copper heat pipe can be directly welded and combined without nickel treatment.

Description

Heat dissipation module structure

This creation is about a heat dissipation module structure, especially a copper embedded layer is arranged on the part to be combined with the aluminum base, so that the aluminum base is respectively connected with a copper heat pipe of different metals and the same material. The first aluminum fin group does not need to go through a nickel treatment process, and the heat dissipation module structure can be directly welded and combined. cooling device.

Conventional radiators or heat sinks are generally made of a combination of copper and aluminum. Since copper has the characteristics of high heat conduction efficiency, conventional radiators or heat sinks are usually made of copper as the heat dissipation base, which is regarded as a solution. The heat generated by the execution unit (central processing unit, graphics card chip or other crystal or heat source) is exchanged for heat; however, if the heat sink or heat sink is made of copper, its weight is extremely heavy and the cost is high; therefore, the current method adopted The parts that are in direct contact with the heat source and will be absorbed into the heat source (such as conduction units (pieces, bodies, seats), copper plates, heat pipes, temperature equalization plates, etc.) The radiator and heat sink) are made of aluminum material with relatively light weight and low cost, so as to reduce weight and cost.

For example, the current general heat dissipation device usually includes an aluminum base, a plurality of copper heat pipes, a snap-fit aluminum fin set and a metal copper plate. The aluminum snap-fit fin set is composed of a plurality of fins. It is composed of buckles, and each fin has two folded edges, each folded edge has a buckle portion protruding outward, and the buckle portions of the fins are mutually buckled so that the two folded edges form the aluminum buckle type fin The top surface and the bottom surface of the chip set, and the bottom surface of the aluminum snap-fit fins are arranged on the top side of the aluminum base, and one of the heat-absorbing ends of the copper heat pipes is connected to the Set in a recessed groove on the bottom surface of the aluminum base, a heat dissipation end of the copper heat pipe extends outward from the heat absorption end and is connected with another aluminum snap-fit fin set, and finally matched with the metal A copper plate covers the bottom surface of the aluminum base for contacting the heat source.

However, since the aluminum surface of the aluminum base is easily oxidized, and the high melting point oxide (Al2O3) will be formed during the welding process, it will directly hinder the fusion with the copper metal and bring difficulties to the welding, because if the copper metal and the aluminum When the metal is directly welded, the directly welded part of the two copper-aluminum materials will be prone to cracks due to brittleness after welding; It is easy to form a eutectic of cuAl2, and eutectic such as cuAl2 will be distributed near the grain boundary, which is prone to fatigue or cracks between the grain boundaries. Moreover, the melting point and eutectic temperature of copper and aluminum are quite different, so when the surface of the aluminum is completely melted in the fusion welding operation, the copper is still in a solid state; on the contrary, when the copper is melted, the aluminum has already melted a lot and It is impossible to coexist in a eutectic or eutectic state, which greatly increases the difficulty of welding copper metal and aluminum metal. In addition, because the welding seam is prone to pores, and the thermal conductivity of copper metal and aluminum metal is very good, the molten pool metal crystallizes quickly during welding, so that the metallurgical reaction gas at high temperature cannot escape, so pores are easily generated. Based on the above problems, it is the reason why the contact surface between the aluminum base and the copper heat pipe and/or the metal copper plate cannot be directly welded.

Therefore, in order to solve the above-mentioned problems that the conventional aluminum-copper metal cannot be directly welded and the above-mentioned extension, the method adopted by the industry is to perform surface treatment on the combined surface of the aluminum base, the copper heat pipe and/or the metal copper plate. After modification, it is convenient for dissimilar metal welding, that is, an electroless nickel layer should be formed on the bottom surface of the aluminum base and the inner side of the groove or its opposite joint contact surface. Dissimilar metals (the two dissimilar metals are aluminum and copper) are welded. Those who are currently familiar with the art are the use of electroless nickel plating as a metal surface modification technique, which provides unique deposit properties, including deposit uniformity in deep depressions, holes and blind holes; among which electroless plating Nickel is also known as electroless nickel Deposition) or autocatalytic plating (Autocatalytic Plating) and it is classified into three types according to phosphorus content: low phosphorus, medium phosphorus and high phosphorus. The biggest difference between electroless nickel plating and electroplating is that the working environment is under the condition of no current, the metal ions are reduced by the reducing agent in the solution, and the surface of the test piece must be catalyzed before electroless nickel plating.

However, although the above method can solve the welding problem of the aluminum base, the copper heat pipe and the metal copper plate, it also leads to environmental protection and other problems, because a large amount of chemical reaction liquid needs to be used in the electroless nickel plating process, and After the electroless nickel plating process, a large amount of industrial waste liquid containing heavy metals or chemical substances will be produced, and a large amount of waste water containing yellow phosphorus and other toxic substances will be produced in the industrial waste liquid. Yellow phosphorus sewage contains yellow phosphorus with a concentration of 50~390mg/L. Yellow phosphorus is a highly toxic substance, which is extremely harmful to the liver and other organs when it enters the human body. Long-term drinking of phosphorus-containing water can cause osteoporosis and other diseases such as mandibular necrosis. Therefore, the current environmental awareness in various countries has begun to pay attention to and banned this electroless nickel plating related process, so efforts are made to promote non-toxic processes to protect the environment. In addition, the recent instability and severe shortage of nickel raw materials in electroless nickel plating in the global supply chain will also lead to higher overall costs.

Accordingly, how to weld and combine two dissimilar metals without using surface modification treatment is a problem that needs to be overcome urgently at present.

One of the objectives of the present invention is to provide a copper embedded layer on the part to be combined with the aluminum base, so that the copper heat pipes and/or copper base plates of different metals and the homogeneous heat dissipation fin sets do not need to be Surface modification can be directly welded, so as to effectively achieve a heat dissipation module structure that reduces costs and protects the environment.

In order to achieve the above-mentioned purpose, the present invention provides a heat dissipation module structure, comprising: an aluminum base having an upper side surface, a lower side surface and at least one joint portion; at least one copper heat pipe having a horizontal heat absorbing portion and a vertical The heat-dissipating portion of the segment and a middle portion connecting the heat-absorbing portion and the heat-dissipating portion form an L-shaped heat pipe, and The heat absorbing part is combined with the joint part of the aluminum base; a first aluminum fin group including a plurality of first fins is formed or combined on the upper side of the aluminum base, and every two first fins A first airflow channel is defined between the fins, which is perpendicular to the upper side of the aluminum base; a second aluminum fin group is formed by a plurality of second fins connected to each other, and each second fin is provided with at least one A through hole passing through the second fin is penetrated in the heat dissipation part of the copper heat pipe, and a second airflow channel is defined between every two second fins parallel to the upper side of the aluminum base and connected to the The first airflow channel is arranged with orthogonal airflow; at least one copper embedded layer is respectively arranged on the upper side and the joint part of the aluminum base and the bottom surface of the first aluminum fin group, so that the The upper side surface of the aluminum base is combined with the bottom surface of the first aluminum fin group through the copper insertion layer, and the joint part of the aluminum base and the heat absorption part of the copper heat pipe are connected through The copper intercalation layer is combined.

According to the present invention, the copper embedded layer is disposed at the desired joint portion of the aluminum base and the first aluminum fin group, so that the aluminum base can be directly connected to copper heat pipes and/or copper heat pipes of dissimilar metals. The copper heat conduction element and the first aluminum fin group of the same material can be directly welded without nickel treatment, thereby effectively reducing the cost and the effect of environmental protection.

1: heat dissipation module structure

111, 112: The first and second aluminum fin groups

1110, 1120: The first and second fins

1111: Top surface

1112: Bottom

1113, 1123: The first fold

1114, 1124: Second hemming

1115, 1125: Buckle part

1126: Through hole

1127: Flange

1128: Flange inner side

1129: Thermal clearance

114, 115: The first and second airflow channels

12: Aluminum base

121: upper side

122: lower side

123: Joint

13: Copper Insertion Layer

131: In-depth face

132: Contact Surface

14: Copper heat pipe

141: heat sink

1411: Heat pipe contact surface

1412: Heat pipe joint surface

142: heat dissipation department

143: Middle part

144: capillary structure

145: Heat Pipe Chamber

16: Copper heat conduction element

161: Heat transfer surface

162: Endothermic Surface

Figure 1A is a three-dimensional exploded schematic diagram of the creation.

Figure 1B is a schematic diagram of another perspective of the three-dimensional decomposition of the creation.

Figure 2A is a schematic diagram of the three-dimensional composition of the creation.

FIG. 2B is a schematic cross-sectional view of FIG. 2A of the creation.

The above-mentioned purpose of the present invention and its structural and functional characteristics will be described with reference to the preferred embodiments of the accompanying drawings.

The present invention provides a heat dissipation module structure 1, please refer to Figures 1A, 1B, 2A, 2B, the heat dissipation module structure 1 includes an aluminum base 12, at least one copper heat pipe 14, at least one copper heat conduction element 16 , a first aluminum fin group 111 and a second aluminum fin group 112; wherein, the first aluminum fin group 111 can be directly generated by an upper side surface 121 of the aluminum base 12, In the embodiment of this case, a plurality of first fins 1110 are horizontally fastened to each other, and the second aluminum fin group 112 is formed of a plurality of second fins 1120 to be vertically fastened to each other, and each of the first fins The sheet 1110 and the second fin 1120 each have a first folded edge 1113, 1123 and a second folded edge 1114, 1124 protruding and aligned with the other adjacent fins (ie the first fin 1110 and the second fin 1120). ) of the first folded edges 1113, 1123 and the second folded edges 1114, 1124, and the first folded edges 1113, 1123 and the second folded edges 1113, 1123 and the second folded edges 1114, 1124 are respectively provided with a buckling portion 1115, 1125, the first and second folded edges 1115, 1125 Although the buckling parts 1115 and 1125 of the fins 1110 and 1120 show the structure of concave-convex matching in this figure, it is not limited to this, and also includes currently known technical means.

Each of the first fins 1110 is combined with the buckling portion 1115 and the buckling portion 1115 of the adjacent first fins 1110 in a horizontal buckling (buckling or overlapping) manner to form a fin type of the first aluminum fin group 111, the first folded edge 1113 and the second folded edge 1114 of the first fins 1110 are arranged in this way to form a top surface 1111 of the first aluminum fin group 111 respectively. and a bottom surface 1112. And a first airflow channel 114 is defined between every two first fins 1110 of the first aluminum fin group 111 for providing an external airflow to pass through to take away the heat on the first fins 1110 .

In addition, each second fin 1120 of the second aluminum fin group 112 is perpendicular to each other (buckled or overlapped) through the buckling portion 1125 and the buckling portion 1125 of the adjacent second fin 1120 Combined with the second aluminum fin group 112 in the form of a fin, the first folded edge 1123 and the second folded edge 1124 of the second fins 1120 respectively form the second aluminum fin together A left side and a right side of the fin group 112, and the second fins 1120 on the top and bottom of the second aluminum fin group 112 respectively constitute the second aluminum fin group 112 a top and a bottom. A second airflow channel 115 is defined between every two second fins 1120 , the second airflow channel 115 is arranged in an orthogonal airflow direction with the first airflow channel 114 , and the second airflow channel 115 is used to provide External airflow passes to remove heat from the second fins 1120 . In addition, in some embodiments, the fins of the second aluminum fin group 112 and the first aluminum fin group 111 (ie, the first fins 1110 and the second fins 1120 ) correspond to the airflow channels (ie, the first fins 1110 and 1120 ). One or two airflow channels 114, 115) can optionally be provided with at least one fan (eg, an axial flow fan) through which external airflow is generated to the respective fins (ie, the first fins 1110 and the second fins 1120 ). ) forced cooling.

Each second fin 1120 of the second aluminum fin group 112 is provided with at least one through hole 1126 , and the through hole 1126 penetrates through the fins 1120 of the second aluminum fin group 112 . The through holes The 1126 are aligned with each other, and the through holes 1126 are used for a heat dissipation portion 142 of the copper heat pipe 14 to pass through and combine. And the through hole 1126 has a flange 1127 ringed around an edge of the through hole 1126 protruding from one side of the second fin 1120 (the lower side of the second fin 1120 is shown in the figure) and defines a Flange inner side 1128. In addition, an inverted fin (ie, the first fin 1110 and the second fin 1120 ) is respectively provided on the outermost side of the first and second fin groups 111 and 112 to prevent the two edges (ie, the first fin 1110 and the second fin 1120 ) from being folded. , two folded edges 1113, 1123, 1114, 1124) to scratch other parts or accidentally injure the user (as shown in Figure 1A).

The aluminum base 12 has the upper side surface 121, the lower side surface 122 and at least one joint 123. The upper side surface 121 of the aluminum base 12 is combined with the bottom surface 1112 of the first aluminum fin group 111. But not limited to this, a plurality of aluminum extruded fins (ie, the first aluminum fin group 111 ) may be integrally formed (generated) on the upper side surface 121 of the aluminum base 12 . And the first airflow channel 114 of the first aluminum fin group 111 and the second airflow channel 115 of the second aluminum fin group 112 are respectively perpendicular to and parallel to the upper side surface 121 of the aluminum base 12, and the aluminum A heat sink is formed between the upper side surface 121 of the base 12 and the bottom end corresponding to the second aluminum fin group 112 . The gap 1129 (space), but not limited thereto, the bottom end of the second aluminum fin group 112 can be combined and disposed on the upper side surface 121 corresponding to the aluminum base 12 .

The joint portion 123 can be a groove or a through hole, and is selected to be located on the upper side surface 121 or the lower side surface 122 or between the two. In this embodiment, the joint portion 123 is a groove arranged on the aluminum base. The lower side surface 122 of the base 12 is described, but not limited thereto, the joint portion 123 may also be a hole penetrating through the position between the upper and lower side surfaces 121 and 122 of the aluminum base 12 . The bonding portion 123 of the aluminum base 12 is used for bonding with a heat absorbing portion 141 opposite to the copper heat pipes 14 . In addition, in the specific implementation, the shape of the joint portion 123 is matched with the shape of the heat absorption portion 141 of the copper heat pipe 14 , such as a flat shape, a circular shape, or a D shape.

Continuing to refer to FIGS. 1A, 1B, and 2B, the upper and lower side surfaces 121, 122 of the aluminum base 12 corresponding to the joint portion 123 and the bottom surface 1112 of the first aluminum fin group 111 can be respectively provided with a copper insert Layer (copper embedding layer) 13, the copper embedding layer 13 has a deep surface 131 and a contact surface 132, the contact surface 132 is used as the exposed surface of the copper embedding layer 13 and the first aluminum fin The bottom surface 1112 of the group 111 is combined with the upper and lower side surfaces 121 and 122 of the aluminum base 12 and the joint 123 , and the deep surface 131 is combined with the bottom surface 1112 of the first aluminum fin group 111 and the upper and lower side surfaces 121 and 122 of the aluminum base 12 and the joint portion 123 . The copper intercalation layer 13 can be copper powder or copper foil or copper sheet or liquid copper through mechanical processing (such as air pressure, hydraulic pressure, stamping or hydraulic extrusion) or surface treatment process (such as spraying, printing, etc.) ) or chemical processing (such as electroplating, anodizing) is formed on the bottom surface 1112 of the first aluminum fin group 111 and the upper and lower side surfaces 121, 122 of the aluminum base 12 and the bonding portion 123, And part of the copper intercalation layer 13 will directly bite or embed or embed or penetrate into the bottom surface 1112 of the first aluminum fin group 111 and the upper and lower sides of the aluminum base 12 during the bonding formation process. 121 , 122 and the joint portion 123 are deposited to form the deep surface 131 . In this way, the copper intercalation layer 13 is not only bonded to the bottom surface 1112, the upper and lower side surfaces 121, 122 and the bonding portion 123, but also the deep surface 131 can be engaged or embedded or embedded. Buried or deep into the bottom surface 1112 , the upper and lower sides 121 , 122 and the bonding portion 123 to deposit as the foundation of the copper intercalation layer 13 to strengthen the bonding force (bonding strength of the copper intercalation layer 13 ) ), so as to prevent the copper embedded layer 13 from peeling off (separating) from the bottom surface 1112 of the first aluminum fin group 111 and the upper and lower side surfaces 121 and 122 of the aluminum base 12 and the joint portion 123 ). With the above arrangement, the upper and lower side surfaces 121 and 122 of the aluminum base 12 are respectively connected to the bottom surface 1112 of the first aluminum fin group 111 and the copper heat conduction element 16 through the copper intercalation layer 13 . In combination, the heat absorbing portion 141 of the copper heat pipe 14 is combined with the copper insert 13 of the joint portion 123 of the aluminum base 12 (eg, welded).

In addition, the copper heat pipes 14 and the aluminum base 12 and the aluminum fin group 111 are respectively made of different metal materials, and each copper heat pipe 14 has a heat pipe chamber 145 filled with a working fluid (eg pure water), the inner wall of the heat pipe chamber 145 is provided with a capillary structure 144 (such as a sintered powder body, a groove, a grid body, a fiber, a sliver body or any combination of the foregoing).

The copper heat pipe 14 has a horizontal heat absorbing portion 141, a vertical heat radiating portion 142, and a right-angled middle portion 143. Both ends of the middle portion 143 are respectively connected to the heat absorbing portion 141 and the heat radiating portion 142 to form a structure. An L-shaped heat pipe, the heat absorbing part 141 is connected to the connecting part 123 of the aluminum base 12, the heat absorbing part 141 transmits the heat absorbed by the heat source to the heat dissipation part 142 at the far end and then passes through the second heat dissipation part 142. The aluminum fin group 112 dissipates heat to the outside. The heat absorption part 141 has a heat pipe contact surface 1411 and a heat pipe joint surface 1412 , the heat pipe contact surface 1411 of the heat absorption part 141 is flush with the lower side surface 122 of the aluminum base 1214 , and the heat pipe joint surface 1412 of the heat absorption part 141 The heat dissipation portion 142 passes through the through holes 1126 of the second fins 1120 and fits tightly with the flange inner side surface 1128 of the flange 1127 combined, but not limited to. In another alternative implementation, the heat dissipation portion 142 of the copper heat pipe 14 and the flange 1127 of the through hole 1126 are loosely coupled, and the copper insertion layer 13 and the copper heat pipe are disposed on the inner side surface 1128 of the flange. The heat sink 142 of 14 is bonded (eg, welded).

Furthermore, although the cross section of the heat dissipation portion 142 of the copper heat pipe 14 is shown as a circle in the figure, the heat pipe contact surface 1411 of the heat absorption portion 141 is a plane, and is flush with the lower side surface 122 of the aluminum base 12, The cross section of the heat absorbing portion 141 is D-shaped (or flat). However, it is not limited to this, and in other alternative implementations, the cross-sections of the heat absorbing portion 141 and the heat dissipating portion 142 may both be circular, flat or D-shaped.

Referring to Figures 1B and 2B again, the copper heat conduction element 16 is a copper plate body (such as a copper base plate), and in this embodiment, the copper heat conduction element 16 and the aluminum base 12 are made of different metal materials, but It is made of the same metal material as the copper heat pipe 14 . And the copper heat conduction element 16 has a heat transfer surface 161 and a heat absorption surface 162, the heat transfer surface 161 is respectively connected with the copper embedded layer 13 of the lower side surface 122 of the aluminum base 12 and the copper heat pipe The heat pipe contact surfaces 1411 of 14 are joined (eg welded joints).

The heat-absorbing surface 162 of the copper heat-conducting element 16 is attached to a heating element (such as a central processing unit or a graphics processor; not shown in the figure), and the heat-absorbing surface 162 is used to conduct the heat generated by adsorbing the heating element. On the heat transfer surface 161, the heat pipe contact surface 1411 of the heat absorption portion 141 of the copper heat pipe 14 absorbs the heat of the heat transfer surface 161, and conducts the heat to the heat dissipation portion 142 at the far end, and then passes through the second aluminum heat pipe. The fin group 112 discharges the heat on the heat dissipation portion 142 to the outside for heat dissipation.

At the same time, part of the heat on the heat transfer surface 161 will be absorbed by the copper embedded layer 13 on the lower side surface 122 of the aluminum base 12 and pass through the aluminum base 12 and the first set of aluminum fins thereon. 111 conducts heat exchange and heat dissipation to the outside.

Therefore, the copper intercalation layer 13 is provided at the position where the aluminum base 12 and the first aluminum fin group 111 are to be combined according to the present invention, so that the aluminum base 12 can be directly connected with the dissimilar metals. The copper heat pipe 14 and/or the copper heat conduction element 16 and the first aluminum fin group 111 can be directly welded without nickel treatment, thereby not only effectively reducing costs, but also achieving environmental protection and solving conventional The shortage of nickel and phosphorus raw materials.

The creation has been described in detail above, but the above is only a preferred embodiment of the creation, and should not limit the scope of implementation of the creation. That is, all equivalent changes and modifications made in accordance with the scope of the application of this creation shall still fall within the scope of the patent of this creation.

1: heat dissipation module structure

111, 112: The first and second aluminum fin groups

1110, 1120: The first and second fins

1111: Top surface

1112: Bottom

1113, 1123: The first fold

1114, 1124: Second hemming

1115, 1125: Buckle part

1126: Through hole

114, 115: The first and second airflow channels

12: Aluminum base

121: upper side

122: lower side

123: Joint

14: Copper heat pipe

141: heat sink

1411: Heat pipe contact surface

1412: Heat pipe joint surface

142: heat dissipation department

143: Middle part

13: Copper Insertion Layer

132: Contact Surface

16: Copper heat conduction element

161: Heat transfer surface

162: Endothermic Surface

Claims (7)

A heat dissipation module structure, comprising: an aluminum base with an upper side surface, a lower side surface and at least one joint part; at least one copper heat pipe with a heat absorption part in a horizontal section and a heat dissipation part in a vertical section and a separate The middle part of the right angle section between the heat absorption part and the heat dissipation part is connected to form an L-shaped heat pipe, and the heat absorption part is combined with the joint part of the aluminum base; a first aluminum fin group, including A plurality of first fins are arranged on the upper side of the aluminum base, and a first airflow channel is defined between every two first fins, and the first airflow channel is perpendicular to the upper surface of the aluminum base Side; a second aluminum fin group, which is formed by a plurality of second fins buckled with each other, each second fin is provided with at least one through hole passing through the second fin and is penetrated in the copper heat pipe the heat dissipation part, and a second airflow channel is defined between every two second fins, which is parallel to the upper side of the aluminum base and is orthogonal to the first airflow channel; and at least one copper An entry layer is respectively arranged on the upper side surface of the aluminum base and the joint portion and a bottom surface of the first aluminum fin group, so that the upper side surface of the aluminum base and the first aluminum fin The bottom surface of the group is combined through the copper insertion layer, and the joint part of the aluminum base and the heat absorption part of the copper heat pipe are combined through the copper insertion layer. The heat dissipation module structure described in claim 1, wherein the joint portion is a groove or a through hole, and is selected to be located on the upper side surface or the lower side surface of the aluminum base or between the two. The heat dissipation module structure described in claim 1 further comprises a copper heat conduction element with a heat transfer surface, and the lower side surface of the aluminum base is provided with the copper insertion layer and the copper The heat transfer surfaces of the heat conducting elements are combined. The heat dissipation module structure described in claim 1, wherein the copper intercalation layer is formed on the bottom surface of the first aluminum fin group and the on the lower side surface of the aluminum base and the joint portion. The heat dissipation module structure described in claim 1, wherein the copper intercalation layer has a deep surface and a contact surface, and the contact surface is combined with the bottom surface of the first aluminum fin set and the On the upper side surface of the aluminum base and the joint portion, the deep surface is combined in the bottom surface of the first aluminum fin group and the upper side surface of the aluminum base and the joint portion. The heat dissipation module structure as described in claim 1, wherein the through hole of each second fin has a flange protruding from one side of the second fin and defines an inner side surface of the flange, the protruding The inner side of the edge is provided with the copper embedded layer to be combined with the heat dissipation portion. The heat dissipation module structure as described in claim 1, wherein the first aluminum fin set is directly formed by the upper side surface of the aluminum base or formed by the plurality of first fins being fastened to each other. Combined on the top side of the aluminum base.

Images