TWI524173B - Radiating fin structure and thermal module thereof - Google Patents

Description

Heat sink fin structure and heat sink

The invention relates to a heat dissipating fin structure and a heat sink thereof, in particular to a structure in which a heat dissipating fin is combined with a heat pipe.

According to the industry, the continuous development of the industry, cooling or heat removal has always been a major obstacle to the development of the electronics industry. With the demand for high performance, the improvement of integration and the application of multi-function, the requirements for heat dissipation are also extremely challenging. Therefore, the research and development of heat transfer efficiency has become a major issue in the electronics industry.

Heat sinks are commonly used to dissipate heat from components or systems into the atmosphere; in the case of lower thermal resistance, the fins are shown to have higher heat dissipation efficiency. Generally speaking, the thermal resistance is composed of the diffusion thermal resistance inside the heat sink and the convective thermal resistance between the surface of the heat sink and the atmosphere; in application, high conductivity materials such as copper and aluminum are often used. Heat sinks are fabricated to reduce the thermal resistance of the diffusion; however, the convective thermal resistance limits the efficiency of the heat sink, making it impossible to meet the thermal requirements of next-generation electronic components.

At present, the market is focused on a more efficient heat dissipation mechanism, and a heat pipe with high thermal conductivity is proposed in combination with a heat sink fin to effectively solve the current heat dissipation problem.

At present, there are several ways to combine the heat pipe and the heat sink. One of them is the tight connection of the heat pipe and the through hole on the heat sink fin. However, this combination means that the heat pipe and the fin are easily caused when the heat pipe penetrates the through hole. The pulling of the heat pipe causes the surface of the heat pipe to be scratched or the fin is deformed, and in severe cases, the through hole is broken, so the manufacturing yield of such a film is low.

The second is that the through holes in the heat pipe and the heat dissipating fins are combined in a loose fit manner, and the gap between the heat pipe and the heat dissipating fins is filled with a thermal conductive adhesive or a solder paste. In this way, a groove connection is required on the heat radiating fins. Through hole, and fill the trench with thermal grease or solder paste, first pass the heat pipe through the through hole Then, the heat conductive glue or the solder paste is melted into a liquid state and then cooled to a solid shape, and then set in the heat pipe and the heat dissipation fins. However, the bonding method has many manufacturing steps, and the excess thermal conductive glue or solder paste is easily exposed. The fins cause poor visual aesthetics and increase in thermal resistance, and the time from manufacture to completion is long, so the manufacturing efficiency is not high.

The reason is that, in view of the shortcomings derived from the above-mentioned products, the inventor of this case exhausted his mind, devoted himself to research and innovation, and finally successfully developed the "heat sink fin structure and its radiator and manufacturing method". It is actually an effect-enhancing creation.

Accordingly, in order to solve the above disadvantages of the prior art, the main object of the present invention is to provide an extension of a heat dissipating fin body to form a continuous ring having a corrugated structure having a plurality of corrugated structures The continuous undulating recesses and projections interfere with the outer surface of the heat pipe and are thus tightly bound to the outer surface of the heat pipe to tightly bond the body to the heat pipe.

Another object of the present invention is to provide an extension of a body of each of the plurality of fins to form a continuous ring having a corrugated structure having a plurality of continuous undulating recesses and protrusions The outer surface of the heat pipe forms an interference, and is thus tightly bound to the outer surface of the heat pipe, so that the body and the heat pipe are tightly coupled together with the heat sink.

Another object of the present invention is to provide a plurality of convex portions and concave portions by pressing an extension portion of the heat pipe through a heat dissipation fin body, thereby causing the convex portion and the concave portion to interfere with the outer surface of the heat pipe. And tightly bound to the outer side surface of the heat pipe to make the body and the heat pipe tightly coupled together.

In order to achieve the above object, the present invention provides a heat dissipation fin structure, comprising: a body having a first side, a second side, and at least one through hole, the first side being opposite to the second side, The through hole is disposed on the body and extends through the first side and the second side for a heat pipe to be inserted therein, and at least one extension system is disposed on either side of the first side and the second side, and The outer edge of the through hole protrudes toward the opposite body, and the extension body forms a continuous ring having a corrugated structure having a plurality of protrusions and recesses opposite to the heat pipe for tightly binding to the heat pipe Outside surface.

The convex portion is in close proximity to the concave portion, and the convex portion and the concave portion interfere with an outer surface of the heat pipe. The width of the aforementioned convex portion is greater than or equal to the width of the concave portion.

The present invention provides a heat dissipation fin manufacturing method, including: a through hole penetrating through a body; an extension body is formed to protrude from the outer edge of the through hole along the through direction; a through hole, and the outer surface of the heat pipe corresponds to an extension; a beam device is provided with a plurality of plates, each of the plates having at least one groove, the groove is formed with a plurality of teeth arranged at intervals Having a space between the teeth; placing the plurality of plates on at least two outer sides of the extension body, so that the plates are tightly pressed toward the extending body, and the teeth and the space of the groove are pressed together The extension body is deformed by pressure, and a plurality of convex portions and concave portions are formed to be closely bound to the outer surface of the heat pipe.

The plurality of plates have a first plate body and a second plate body, the first plate body having at least one first groove being semi-circular, and the second plate body having at least one second groove being semi-circular . The aforementioned convex portion corresponds to a space, and the concave portion corresponds to the tooth portion.

For a further understanding of the features and technical aspects of the present invention, reference should be made

10‧‧‧ radiator

11‧‧‧Ontology

112‧‧‧ first side

113‧‧‧ second side

114‧‧‧through hole

115‧‧‧Extensions

1151‧‧‧ convex

1152‧‧‧ recess

117‧‧‧ flow path

12‧‧‧ Heat pipe

121‧‧‧ outside surface

30‧‧‧Bundle device

31‧‧‧ first board

311‧‧‧First groove

312‧‧‧First tooth

313‧‧‧First space

32‧‧‧Second plate

321‧‧‧second groove

322‧‧‧second tooth

323‧‧‧Second space

1 is a schematic perspective view of a heat sink fin body and a heat pipe according to the present invention; FIG. 2 is a perspective view of a heat sink fin body and a heat pipe according to the present invention; FIG. 3 is a front view of the heat sink fin body and heat pipe combination of the present invention; Figure 4 is a schematic view of a first type of the extension of the present invention; Figure 5 is a schematic view of a second type of the extension of the present invention; Figure 6 is a schematic view of a third type of the extension of the present invention; 3 is a schematic exploded perspective view of a heat sink according to the present invention; FIG. 8 is a schematic view showing a manufacturing process of the heat sink of the present invention; FIG. 10 is a schematic view showing a manufacturing process of the beam forming device of the present invention; 11 is a schematic view of the beam mouth device of the present invention when the extension body is pressed; FIG. 11A is a partially enlarged schematic view showing the first two grooves of the extension body and the beam mouth device of the present invention.

The present invention provides a heat dissipating fin structure and a heat sink thereof. The drawing is a preferred embodiment of the present invention. Please refer to the heat dissipating fin structure shown in FIGS. 1 and 2 and 3 including a body 11 having at least one through. The holes 114 and at least one heat pipe 12 are respectively inserted into the through holes 114.

As shown in FIG. 1 , the body 11 has a first side 112 and a second side 113 . The first side 112 is opposite to the second side 113 . The through hole 114 extends through the first side 112 and the second side. 113, which is represented by two through holes 114 in the figure, but is not limited thereto, and the body 11 may also have more than one through hole 114 (not limited thereto).

The outer edge of each of the through holes 114 is provided with an extension body 115 protruding toward the opposite body 11 , and the extension bodies 115 form a continuous ring having a corrugated structure, and the extensions 115 are The first side 112 or the second side 113 may be disposed, and in the figure, the extension 115 is disposed on the first side 112.

As shown in Figures 2 and 3 and 4, the heat pipe 12 is disposed in the through hole 114 (as shown in Fig. 1), and the body 11 is sleeved on the heat pipe 12, and the extension body 115 corresponds to the heat pipe. The outer surface 121 of the extension body 115, the corrugated structure of the extension body 115 has a plurality of continuous high and low undulations, and the concave portion 1152 is staggered around the radial direction of the extension body 115. The convex portion 1151 is adjacent to the concave portion 1152, and the convex portion 1151 is adjacent to the concave portion 1152. The convex portion 1151 and the concave portion 1152 are tightly bound to the outer surface 121 of the heat pipe 12, and are radially pressed in the direction of the heat pipe 12 to deform the outer surface 121 of the heat pipe 12, thereby forming interference with the outer surface 121. The body 11 is firmly and tightly coupled to the heat pipe 12.

As shown in FIG. 4, the width of the convex portion 1151 is smaller than the width of the concave portion 1152. However, the width of the convex portion 1151 may be larger than the width of the concave portion 1152 as shown in FIG. 5, or The width of the convex portion 1151 shown in Fig. 6 is equal to the width of the concave portion 1152.

In the seventh and eighth embodiments, the plurality of heat dissipating fins are sequentially connected in series to the heat pipe 12 to form a heat sink 10. The positions of the through holes 114 in the body 11 of each of the plurality of heat dissipating fins are the same. And the main body 11 is spaced apart, and the first-class channel 117 is disposed between each of the two bodies 11. After each body 11 is sleeved with the heat pipe 12, the extension body 115 has a plurality of continuous high and low undulating convex portions 1151 and recesses 1152. Staggered around the radial direction of the extension body 115, the convex portions 1511 The heat pipe 12 is opposite to the heat pipe 12, and is tightly bound to the outer surface 121 of the heat pipe 12, and is radially pressed in the direction of the heat pipe 12 to deform the outer surface 121 of the heat pipe 12, thereby forming the outer surface 121. Interference, the body 11 and the heat pipe 12 are firmly and tightly coupled, the overall structure of the heat sink 10 is stabilized, and the body 11 is not shaken relative to the heat pipe 12.

Furthermore, as shown in FIG. 9 and referring to the first and second figures, the heat dissipation fin structure is completed by the following steps, which include:

Step 1 (sp1): at least one through hole 114 is penetrated in a body 11 (as shown in FIG. 1).

Step 2 (sp2): an extension body 115 is formed to protrude from the outer edge of the through hole 114 in the through direction (as shown in FIG. 1).

Step 3 (sp3): a heat pipe 12 is inserted through the through hole 114, and the outer surface 121 of the heat pipe 12 corresponds to the extension body 115.

Step 4 (sp4): applying a beam device 30 to the extension body 115, the extension body 115 is pressed to form a plurality of convex portions 1511 and the recess portion 1512 is tightly bound to the outer surface 121 of the heat pipe 12 (eg, 10th and Figure 11 shows).

The aforementioned steps 1 (sp1) and 2 (sp2) are preferably made by general press forming.

The first beam body 31 has at least one first groove 311 which is semicircular and has a plurality of first tooth portions 312 disposed at intervals. Each of the first first tooth portions 312 has a first space 313; and a second plate body 32 has at least one second groove 321 which is semi-circular, and is formed with a plurality of second teeth portions 322 disposed at intervals. There is a second space 323 between every two second tooth portions 322.

The first plate body 31 and the second plate body 32 are respectively disposed on at least two outer sides of the extension body 115, and the first plate body 31 and the second plate body 32 are tightly pressed toward the extension body 115, the first The groove 311 and the second groove 321 are pressed against the extension body 115, and the convex portion 1151 and the recess 1152 are formed along with the outer surface 1151 of the extension body 115.

Continued as shown in FIG. 11A, the convex portion 1151 is formed corresponding to the first and second spaces 313, 323, and the concave portion 1152 is formed corresponding to the first tooth portion 312 and the second tooth portion 322, and the extension is performed by the above steps. The body 115 forms an interference with the outer side surface 121 of the heat pipe 12 and is tightly bound to the heat The outer side surface 121 of the tube 12. By the above structure and method, the present invention is improved as compared with the prior art:

1. The protrusion 1151 and the recess 1152 having a plurality of consecutive high and low undulations are staggered around the radial direction of the extension 115 by the extension portion 115 on the body 11 of the heat dissipation fin, and are radially directed to the heat pipe 12. Extrusion, the outer surface 121 of the heat pipe 12 is deformed to interfere with the outer surface 121 of the heat pipe 12, and is tightly bound to the outer surface 121 of the heat pipe 12 to make the body 11 and the heat pipe 12 Tightly combined.

2. The protrusions 1151 and the recesses 1152 having a plurality of consecutive high and low undulations are arranged in a staggered manner around the radial direction of the extension body 115 in the extension portion 115 of the body 11 of each of the plurality of heat dissipation fins, and the direction of the heat pipe 12 is Squeezing, deforming the outer surface 121 of the heat pipe 12 to cause the extension portion 115 to interfere with the outer surface 121 of the heat pipe 12, thereby being tightly bound to the outer surface 121 of the heat pipe 12, so that the body 11 and the heat pipe The 12 are tightly joined together and form a stable heat sink 10.

3. After a heat pipe 12 is inserted through the body 11 of a heat dissipation fin, the corrugated structure of the extension portion 115 on the body 11 is pressed to form a plurality of convex portions 1151 and a recess 1152, and the convex portion 1151 and the concave portion 1152 are further formed. A manufacturing method that interferes with the outer side surface 121 of the heat pipe 12 and is tightly bound to the outer side surface 121 of the heat pipe 12 to closely bond the body 11 and the heat pipe 12.

While the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and the scope of the present invention can be varied and modified without departing from the spirit and scope of the invention. The scope of the patent application is subject to the provisions of the attached patent application.

11‧‧‧Ontology

112‧‧‧ first side

113‧‧‧ second side

115‧‧‧Extensions

1151‧‧‧ convex

1152‧‧‧ recess

12‧‧‧ Heat pipe

121‧‧‧ outside surface

Claims (8)

A heat dissipation fin structure includes: a body having a first side, a second side, and at least one through hole, wherein the first side is opposite to the second side, and the through hole is disposed on the body and penetrates the first And a second side of the second side for inserting a heat pipe therein, the at least one extension forming a continuous ring on either side of the first side and the second side, and from the outer edge of the through hole toward the opposite body The direction of the protrusion, the ring of the extension has a corrugated structure, the corrugated structure has a plurality of continuous high and low undulations, and the concave portion is staggered around the radial direction of the extension body, wherein the convex portion and the concave portion are The heat pipe is radially extruded to deform the outer surface of the heat pipe such that the corrugated structure of the ring of the extension interferes with the outer surface of the heat pipe such that the extension is tightly bound to the outer surface of the heat pipe. The heat dissipation fin structure of claim 1, wherein the width of the convex portion is greater than the width of the concave portion. The heat dissipation fin structure of claim 1, wherein the width of the convex portion is smaller than the width of the concave portion. The heat dissipation fin structure of claim 1, wherein the width of the convex portion is equal to the width of the concave portion. A heat sink includes: at least one heat pipe; a plurality of heat dissipation fins, each heat dissipation fin comprising: a body having a first side, a second side, and at least one through hole, the first side opposite the second The through hole is disposed on the body and extends through the first side and the second side for a heat pipe to be inserted therein, and the at least one extension body forms a continuous ring on the first side and the second side Elongating from the outer edge of the through hole toward the opposite body, the ring of the extending body has a corrugated structure having a plurality of continuous high and low undulating convex portions and concave portions staggered therein a radial periphery of the extension body, wherein the protrusions and recesses are toward the heat pipe diameter The outer surface of the heat pipe is deformed so as to cause the corrugated structure of the extension to interfere with the outer surface of the heat pipe so that the extension body is tightly bound to the outer surface of the heat pipe. The heat sink of claim 5, wherein the width of the protrusion is greater than the width of the recess. The heat sink of claim 5, wherein the width of the convex portion is smaller than the width of the concave portion. A heat sink according to claim 5, wherein the width of the convex portion is equal to the width of the concave portion.