TW201715939A - Heat dissipation unit and manufacturing method thereof improving the flatness of a plane contacting a heat source - Google Patents

Abstract

A heat dissipation unit and a manufacturing method thereof are provided. The heat dissipation unit comprises a heat pipe and a base. The base has a first side and a second side. The second side is opened with a groove and a plurality of through holes communicating the first side and the second side. The heat pipe has a heat absorption area and a conduction area. The conduction is formed by extending from the heat absorption area toward at least one end opposite to the heat absorption area. The heat pipe corresponds to the portion of the through holes for being received in the through holes, and is aligned with the first side of the base at the same time. Through the heat dissipation unit and the manufacturing method thereof of the present invention, the drawback of the prior art that it is not easy to control precision in aligning protrusions of the heat pipe and the base with two planes of the heat pipe can be eliminated.

Description

Heat dissipation unit and manufacturing method thereof

A heat dissipating unit and a manufacturing method thereof, in particular, a heat dissipating unit having a preferred thermal contact plane and a manufacturing method thereof.

The current electronic device has a central processing unit and other computing chips, and generates heat when performing calculations. Therefore, the heat dissipating component is required to increase the heat dissipation efficiency to achieve the purpose of deheating, and the most commonly used heat dissipating components such as heat pipes and temperature are used. Components such as boards, heat sinks, and heat sink fins are mainly used to increase the heat transfer speed or to conduct heat to the far end for heat dissipation at the far end, or to increase the heat dissipation area to improve heat dissipation performance. Generally, the central processing unit mainly transmits and The heat sink is in contact with the heat transfer, and the heat sink is an effect of increasing the heat dissipation area. In order to make the heat transfer speed faster, the heat pipe is combined with the heat sink, and the heat sink is connected to the central processor to open the hole. Or a recess is formed so that the heat pipe can directly expose the heat conduction to the central processor to transmit heat to the heat sink having a large heat dissipation area, and the heat dissipating component combined with the heat pipe and the heat sink is often used. The heat dissipating component still has a defect that cannot be improved, and the missing is to be placed on the side of the heat sink. In the groove of the tube, the heat pipe is fixed in the groove by way of laying or vertical placement, but the heat pipe still has a partial portion protruding from the portion of the heat sink that is in contact with the central processing unit, and the flatness is not It is good to generate a thermal resistance phenomenon. Generally, the portion is removed by milling the protruding portion, and since the portion of the heat pipe protruding from the groove of the heat sink is not all of the same height, and the heat pipe itself is The wall also has a different thickness. When milling, it is quite easy to over-cut and destroy the heat pipe wall, which makes the heat pipe lose its effect. Therefore, how to improve the lack of knowledge is the first priority.

Accordingly, in order to solve the above-mentioned shortcomings of the prior art, the main object of the present invention is to provide a heat dissipating unit capable of improving the flatness of the plane in which the heat radiating unit is in contact with the heat source.

Another object of the present invention is to provide a method of manufacturing a heat dissipating unit that improves the leveling accuracy of a plane in which a heat radiating unit is in contact with a heat source.

The present invention provides a heat dissipating unit, comprising: a heat pipe and a base; the base has a first side and a second side, the second side defines a groove and the plurality of wires are connected a through hole of the first and second sides; the heat pipe has a heat absorption zone and a conduction zone, and the conduction zone is configured by extending from the heat absorption zone to at least one end opposite to the heat absorption zone, and the heat pipe corresponds to the through hole The portion is received in the through holes and simultaneously aligned with the first side of the base.

In order to achieve the above object, the present invention provides a method for manufacturing a heat dissipating unit, which comprises the following steps:

Providing a base and a heat pipe;

Forming a groove and a plurality of through holes on the upper side of the base;

Inserting the heat pipe into the groove and machining the upper side of the base, and forcing the heat pipe into the groove and the through hole;

The lower side of the base is machined, and the portion of the heat pipe protruding from the through hole is pressed into the through hole to be aligned with the lower side of the base.

The heat dissipating unit and the manufacturing method thereof of the present invention can improve the problem that the heat dissipating unit composed of the heat dissipating substrate and the heat pipe in the prior art is difficult to control the precision of the portion where the heat pipe and the heat dissipating substrate are in contact with the heat source during assembly.

1‧‧‧heating unit

11‧‧‧ Heat pipe

111‧‧‧heat absorption zone

112‧‧‧Transmission zone

12‧‧‧ Pedestal

121‧‧‧ first side

122‧‧‧ second side

123‧‧‧ trench

124‧‧‧through holes

2‧‧‧heat source

1 is an exploded perspective view of a first embodiment of a heat dissipation unit of the present invention;

Figure 2 is a perspective assembled view of the first embodiment of the heat dissipation unit of the present invention;

Figure 3 is a sectional view showing the combination of the first embodiment of the heat dissipating unit of the present invention;

Figure 4 is a perspective exploded view of a second embodiment of the heat dissipation unit of the present invention;

Figure 5 is a schematic view showing the processing method of the heat dissipation unit of the present invention;

Figure 6 is a schematic view showing the processing method of the heat dissipation unit of the present invention;

Figure 7 is a flow chart showing the steps of the first embodiment of the method for manufacturing the heat dissipation unit of the present invention;

Figure 8 is a flow chart showing the steps of the second embodiment of the method for manufacturing the heat dissipation unit of the present invention.

The above object of the present invention, as well as its structural and functional features, will be described in accordance with the preferred embodiments of the drawings.

Referring to the first, second, and third embodiments, the first embodiment of the heat dissipating unit of the present invention is a perspective exploded view and a combination and a cross-sectional view. As shown, the heat dissipating unit 1 includes a heat pipe 11 and a pedestal 12. ;

The heat pipe 11 has a heat absorption zone 111 and a conduction zone 112, and the conduction zone 112 is configured by extending from the heat absorption zone 111 to at least one end opposite to the heat absorption zone 111. The heat pipe 11 is a flat heat pipe. Either the D-type heat pipe or the round pipe can be used in combination with each other.

The base 12 has a first side 121 and a second side 122. The first and second sides 121 and 122 are correspondingly disposed on the upper and lower sides of the base 12, and the second side 122 defines a groove. a groove 123 and a plurality of through holes 124 communicating with the first and second sides 121 and 122. The heat pipe 11 is received in the groove 123, and the heat pipe 11 is correspondingly received at the through holes 124. The extension is disposed in the through hole 124 and is aligned with the first side 121 of the base 12 .

The susceptor 12 is disposed at the through hole 124 to directly contact the at least one heat source 2 to conduct heat.

It can be seen from FIG. 3 that the heat pipe 11 protrudes (partially) corresponding to the through hole 124 of the base 12 and is received in the through hole 124 and the first side of the base 12 121 is phase-cut, and the rest of the heat pipe 11 is received in the groove 123 of the base 12 and is aligned with the second side 122 of the base 12.

4 is a perspective exploded view of a second embodiment of the heat dissipating unit of the present invention. The present embodiment is described by combining a circular heat pipe 11 and a base 12, and the circular heat pipe 11 is placed in the base. When the groove 123 of the seat 12 (the groove shape of the embodiment is a circular arc shape), the heat pipe 11 partially protrudes from the groove 123 of the base 12, and can be machined (stamped, rolled) The portion of the heat pipe 11 that protrudes from the groove 123 is forced into the groove 123 and simultaneously filled into the through hole 124, so that the heat pipe 11 is shaped in the groove 123 and the through hole 124 to be tightly coupled thereto. After the mechanical compression and compression, the heat pipe 11 also has a portion of the first side 121 of the base 12 protruding from the through hole 124, and the portion can be pressed back into the through hole 124 by mechanical machining. And the first side 121 of the base 12 is aligned, so that the two sides of the heat pipe 11 are aligned with the first and second sides 121 and 122 of the base 12, and the embodiment is stamped. 5 is shown as an illustration, but not limited to, and can also be rolled (as shown in Figure 6).

Please refer to FIG. 7 , which is a flow chart of the steps of the first embodiment of the manufacturing method of the heat dissipating unit of the present invention, and together with the processing diagrams of FIGS. 1 to 4 and 5 and 6 , as shown in the figure. The manufacturing method of the heat dissipation unit includes the following steps:

S1: providing a base and a heat pipe;

A susceptor 12 and a heat pipe 11 are provided. The susceptor 12 can be selected from any one of copper and aluminum materials or alloys thereof. The heat pipe 11 is a flat heat pipe or a D-type heat pipe or a pipe. One.

S2: forming a groove and a plurality of through holes on the upper side of the base;

A groove 123 is formed on the upper side (the second side 122) of the susceptor 12 by a material removal process, and a plurality of through holes 124 are formed in the groove 123 disposed near the center of the susceptor 12, and the through holes 124 are The susceptor 12 is also connected to the plane of the lower side (first side 121) of the susceptor 12.

S3: placing the heat pipe into the groove and machining the upper side of the base, and forcing the heat pipe into the groove and the through hole;

The heat pipe 11 is correspondingly placed into the groove 123 of the susceptor 12, and the heat pipe is subjected to mechanical processing to force the heat pipe into the groove and the portion of the heat pipe corresponding to the through hole is simultaneously forced into the through hole. The machining is any one of stamping or rolling or forging, and the machining may be one-time processing (pressing processing as shown in Fig. 5) or repeating multiple processing (forging processing, such as Figure 6 shows the rolling process as shown in Figure 7.

S4: machining the lower side of the base, and pressing the portion of the heat pipe protruding from the through hole into the through hole to be aligned with the lower side of the base.

The heat pipe 11 corresponds to the through holes 124 of the base 12, is mechanically forced into the through hole 124, and partially protrudes from the through hole 124 to the lower side of the base 12 (the first side 121) The portion of the heat pipe 11 on the surface is mechanically processed to expose the portion of the heat pipe 11 that protrudes through the through holes 124 of the base 12 into the through hole 124 of the base 12, so that the heat pipes 11 protrude. The portion of the through hole 124 is aligned with the surface of the lower side (first side 121) of the susceptor 12.

Please refer to FIG. 8 , which is a flow chart of the second embodiment of the manufacturing method of the heat dissipation unit of the present invention. The embodiment includes the following steps:

S1: providing a base and a heat pipe;

S2: forming a groove and a plurality of through holes on the upper side of the base;

S3: placing the heat pipe into the groove and machining the upper side of the base, and forcing the heat pipe into the groove and the through hole;

S4: machining the lower side of the base, and pressing the portion of the heat pipe protruding from the through hole into the through hole to be aligned with the lower side of the base.

However, this embodiment is the same as that of the foregoing first embodiment, and therefore will not be described again herein. The difference between the present embodiment and the foregoing first embodiment is that there is a step S5: the pedestal is processed through the cutting process. Finishing is performed at the boss to improve the surface flatness of the boss.

The surface of the pedestal 12 and the heat pipe 11 after machining is once again subjected to a cutting process to improve the accuracy of the surface, and the cutting process can be any one of milling or planing or grinding.

Through the manufacturing method of the present invention, the lack of precision control of the conventional heat pipe and the pedestal can be greatly improved, and the loss of the thermal resistance phenomenon caused by the combination of the conventional heat pipe and the susceptor is not improved.

1‧‧‧heating unit

11‧‧‧ Heat pipe

111‧‧‧heat absorption zone

112‧‧‧Transmission zone

12‧‧‧ Pedestal

121‧‧‧ first side

122‧‧‧ second side

123‧‧‧ trench

124‧‧‧through holes

2‧‧‧heat source

Claims (9)

A heat dissipation unit comprising:
a pedestal having a first side and a second side, the second side defines a groove and a plurality of through holes communicating with the first and second sides;
a heat pipe having a heat absorbing zone and a conducting zone, wherein the heat conducting zone is configured to extend from at least one end of the heat absorbing zone toward the opposite heat absorbing zone, and the heat pipe corresponds to a portion of the through hole Within the through holes and simultaneously with the first side of the base. The heat dissipating unit according to claim 1, wherein the heat pipe is any one of a flat heat pipe or a D heat pipe. The heat dissipating unit of claim 1, wherein the first side and the second side are correspondingly disposed under the base and on the upper side. The heat dissipating unit of claim 1, wherein the base is disposed in contact with the at least one heat source to directly conduct heat. A method for manufacturing a heat dissipation unit includes the following steps:
Providing a base and a heat pipe;
Forming a groove and a plurality of through holes on the upper side of the base;
Inserting the heat pipe into the groove and machining the upper side of the base, and forcing the heat pipe into the groove and the through hole;
The lower side of the base is machined, and the portion of the heat pipe protruding from the through hole is pressed into the through hole to be aligned with the lower side of the base. The method for manufacturing a heat dissipating unit according to claim 5, wherein the through holes are disposed in a groove near the center of the base. The method for manufacturing a heat dissipating unit according to claim 5, wherein the machining is any one of press working or rolling or forging. The method for manufacturing a heat dissipating unit according to claim 5, wherein the lower side of the base is machined, and a portion of the heat pipe protruding from the through hole is pressed into the through hole to be placed under the base After the side is cut in this step, there is a further step: finishing the boss of the base through the cutting process, thereby improving the surface flatness of the boss. The method for manufacturing a heat dissipating unit according to claim 5, wherein the heat pipe is any one of a flat heat pipe or a D heat pipe or a circular heat pipe.