JP5564376B2 - Radiation fin structure and radiator using the same - Google Patents

Description

  The present invention relates to a structure of a radiating fin and a radiator using the same, and more particularly to a structure of a radiating fin in which a radiating fin and a heat pipe are coupled, and a radiator using the same.

  While the electronics industry continues to evolve, problems with cooling or heat removal are a major obstacle. As electronic devices are required to have higher functions, the degree of integration has increased, and as many functions have been applied, the demand for heat dissipation has become extremely high. Therefore, research on heat transfer efficiency has become a major challenge in the electronics industry.

  Generally, heat sinks are used to release the heat of a member or system into the atmosphere. The low heat resistance of the heat dissipating fin indicates that the heat dissipating efficiency of the heat dissipating fin is high. In general, the thermal resistance is composed of spreading resistance inside the radiating fin and contact thermal resistance between the surface of the radiating fin and the atmosphere. In application, the radiating fin is manufactured from a material having high thermal conductivity such as copper and aluminum, so that spreading resistance is reduced. However, since the function of the heat radiation fin is limited by the contact thermal resistance, it has not been possible to satisfy the heat radiation requirement from the electronic device in a new era.

  Currently, the market is paying attention to highly efficient heat dissipation mechanism, and a structure that combines heat pipes with high heat conduction effect and heat dissipation fins has been developed one after another, effectively solving the heat dissipation problem at the present stage doing.

  There are several types of conventional coupling methods between heat pipes and radiators. The first is a system in which the heat pipe is tightly connected to the through hole on the radiating fin. However, in this coupling method, when the heat pipe is passed through the through hole, the surface of the heat pipe is easily scratched or the radiating fin is easily deformed, and if it is severe, the through hole is damaged. Therefore, the product manufactured by this coupling method has a low non-defective rate.

  The second is a method in which a heat pipe is loosely inserted into a through hole on a heat radiating fin, and then a heat conductive adhesive or solder paste is filled in a gap between the heat pipe and the heat radiating fin. When this method is adopted, it is necessary to open a groove portion communicating with the through hole on the heat radiating fin, and to fill the groove portion with a heat conductive adhesive or a solder paste. That is, after the heat pipe is penetrated into the through hole, the heat conductive adhesive or solder paste that is heated to be liquid is filled between the heat pipe and the through hole of the heat radiation fin. Then, it cools and a heat conductive adhesive or a solder paste is solidified. However, this coupling method has many manufacturing processes, and excess heat conductive adhesive or solder paste is spilled on the heat radiating fins, resulting in a decrease in aesthetics and an increase in thermal resistance. In addition, the manufacturing efficiency is low because the time required for the manufacturing is long.

As a prior art which couple | bonds the above heat pipes and a radiation fin, there exist some which are disclosed by patent document 1 and patent document 2, for example. Patent Document 1 discloses a cooling module in which an insertion hole is provided in a heat dissipating fin, a plurality of cuts are formed in a hole edge, and a heat pipe is press-fitted into the insertion hole in [0026] and FIG. Further, in Patent Document 2, in [0023] and FIG. 1, a large number of fins are attached to both sides of the heat dissipation board to form a heat dissipation body, and a heat pipe mounting hole is provided in the center of the heat dissipation board in the thickness direction. A cooling device for press-fitting a heat pipe is disclosed.
However, since these two prior arts press-fit the heat pipe into the insertion hole or the mounting hole, the same problem as the above-mentioned 1 is likely to occur.

  Accordingly, the inventors of the present invention have conducted research and improvement in view of the above-mentioned drawbacks of the prior art, and finally devised the “structure of heat radiation fins, heat radiators using the same and methods for producing them” of the present invention. I put it out.

JP 2002-280505 A JP 2008-147319 A

  The first object of the present invention is to form a plurality of recesses and protrusions on the extended body on the main body of the heat dissipating fin, thereby forming an interference portion with the outer surface of the heat pipe. The main body and the heat pipe are tightly coupled to each other by being firmly fixed to the outer surface.

  The second object of the present invention is to form an interference portion between the outer surface of the heat pipe by forming a plurality of recesses and projections on the extended body on the main body of each radiation fin in the plurality of radiation fins. And it is providing the heat radiator which can couple | bond a main body and a heat pipe tightly by fixing an extending | stretching body tightly to the outer surface of a heat pipe.

  The third object of the present invention is to pierce the heat pipe through the main body of the heat dissipating fin, and then pressurize and form the plurality of convex portions and concave portions on the elongated body, thereby forming the plurality of concave portions and convex portions and the heat pipe. An interference portion is formed between the outer surface of the heat pipe and the stretched body is tightly fixed to the outer surface of the heat pipe to provide a structure of a heat radiating fin capable of tightly coupling the main body and the heat pipe. is there.

The structure of the heat dissipating fin according to one aspect of the present invention is that a through hole is drilled on the main body, an elongated body is formed by projecting in the penetrating direction from an outer edge of the through hole, and a heat pipe is passed through the through hole. The outer surface of the heat pipe is made to correspond to the stretched body, and the top of the stretched body is pressed by a press device to form a plurality of protrusions and recesses on the stretched body, and the stretched body is in close contact with the outer surface of the heat pipe The pressing device has at least a first plate and a second plate, and the first plate has at least one first groove. In the first concave groove, first tooth portions are formed with a space therebetween, each first tooth portion has a first space, and the second plate body is And at least one second groove, and the second tooth is spaced from the second groove. Is formed, between each second tooth portion has a second space.

  The convex portion is adjacent to the concave portion, and an interference portion is formed between the convex portion and the concave portion and the outer surface of the heat pipe. The width of the convex portion is greater than, equal to, or smaller than the width of the concave portion. The convex portion and the concave portion each have an arcuate end or a pointed end.

A radiator according to another aspect of the present invention includes at least one heat pipe and a plurality of radiating fins, and each radiating fin in the plurality of radiating fins has a through hole formed on a main body, and extends through the elongated body. It is formed by projecting in the penetration direction from the outer edge of the hole, the heat pipe is penetrated through the through hole, the outer surface of the heat pipe is made to correspond to the stretched body, the top of the stretched body is pressed by a press device, and the stretching A plurality of protrusions and recesses formed on a body, and a structure of a heat dissipating fin for tightly fixing the stretched body to an outer surface of the heat pipe, wherein the pressing device includes at least a first plate and a second plate The first plate body has at least one first groove, and first teeth are formed at intervals in the first groove, each of the first grooves A space between the first teeth has a first space, and the first tooth The plate body has at least one second concave groove, and second tooth portions are formed in the second concave groove with an interval between each second tooth portion. It has 2 spaces.

  The plurality of plate bodies include a first plate body and a second plate body. The first plate has at least one first groove that is semicircular. The second plate has at least one second concave groove that is semicircular. The convex part of the stretched body is formed corresponding to the space, and the concave part of the stretched body is formed corresponding to the tooth part.

  By forming a plurality of convex portions and concave portions on the elongated body on the main body of the heat radiating fin, an interference portion is formed between the outer surface of the heat pipe. Thereby, since an extending | stretching body is closely fixed to the outer surface of a heat pipe, a main body and a heat pipe can be couple | bonded closely.

It is a disassembled perspective view which shows the main body and heat pipe of the radiation fin by one Embodiment of this invention. It is a perspective view which shows the main body and heat pipe of the radiation fin by one Embodiment of this invention. It is a front view of the partial cross section which shows the main body and heat pipe of the radiation fin by one Embodiment of this invention. It is sectional drawing which shows 1st Embodiment of the extending | stretching body of the radiation fin by one Embodiment of this invention. It is sectional drawing which shows 2nd Embodiment of the extending | stretching body of the radiation fin by one Embodiment of this invention. It is sectional drawing which shows 3rd Embodiment of the extending | stretching body of the radiation fin by one Embodiment of this invention. It is a disassembled perspective view which shows the heat radiator by one Embodiment of this invention. It is a perspective view which shows the heat radiator by one Embodiment of this invention. It is a flowchart which shows the manufacturing process of the radiation fin by one Embodiment of this invention. It is sectional drawing which shows the state before the press apparatus by one Embodiment of this invention presses an extending | stretching body. It is sectional drawing which shows a state when the press apparatus by one Embodiment of this invention presses an extending | stretching body. It is an expanded sectional view showing the extension object by the 1 embodiment of the present invention, the 1st ditch, and the 2nd ditch of a press device.

  DESCRIPTION OF EMBODIMENTS Embodiments showing the objects, features, and effects of the present invention will be described in detail with reference to the drawings.

  The present invention provides a structure of a radiating fin, a radiator using the radiating fin, and a manufacturing method thereof. The drawings show preferred embodiments of the invention. Please refer to FIG. As shown in FIGS. 1 to 3, the structure of the radiation fin according to the present embodiment includes a main body 11 in which at least one through hole 114 is opened. In addition, at least one heat pipe 12 is inserted into the through hole 114.

  As shown in FIG. 1, the main body 11 has a first side surface 112 and a second side surface 113 that are in a front-back relationship. The through hole 114 passes through the first side surface 112 and the second side surface 113. In FIG. 1, the number of through holes 114 is two. However, the number is not limited thereto, and one or more through holes 114 can be formed in the main body 11.

  At the outer edge of each through-hole 114, a stretched body 115 that protrudes in a direction away from the main body 11, that is, in the through direction is provided. The plurality of stretched bodies 115 can be provided on the first side surface 112 or the second side surface 113. In FIG. 1, the stretched body 115 is provided on the first side surface 112.

  Please refer to FIG. The heat pipe 12 is penetrated by the several through-hole 114 (refer FIG. 1). The stretched body 115 corresponds to the outer surface 121 of the heat pipe 12, and a plurality of convex portions 1151 and concave portions 1152 are formed. The convex portion 1151 is formed next to the concave portion 1152. The stretched body 115 is closely fixed to the outer surface 121 of the heat pipe 12 by forming the convex portion 1151 and the concave portion 1152. That is, by forming an interference portion that interferes with each other between the stretched body 115 and the outer surface 121, the main body 11 and the heat pipe 12 are stably and tightly coupled.

  Please refer to FIG. As shown in FIG. 4, the width of the protrusion 1151 is smaller than the width of the recess 1152. However, the present invention is not limited to this. As shown in FIG. 5, the width of the convex portion 1151 is made larger than the width of the concave portion 1152, or the width of the convex portion 1151 and the width of the concave portion 1152, as shown in FIG. Can be the same.

Please refer to FIG. 7 and FIG. The radiator 10 is formed by connecting the plurality of main bodies 11 in series on the heat pipe 12 in order. The positions of the through holes 114 on each main body 11 are the same. Further, the plurality of main bodies 11 are arranged at intervals, whereby a flow path 117 is formed between the main bodies 11. After fitting each main body 11 to the heat pipe 12, a plurality of convex portions 1151 and concave portions 1152 are formed in the stretched body 115. The stretched body 115 is tightly fixed to the outer surface 121 of the heat pipe 12 by forming a plurality of convex portions 1151 and concave portions 1152. That is, by forming an interference portion between the stretched body 115 and the outer surface 121, the main body 11 and the heat pipe 12 can be stably and tightly coupled, and the structure of the entire radiator 10 can be stabilized. The main body 11 does not swing on the heat pipe 12.
Please refer to FIG. 1, FIG. 2 and FIG. 9 simultaneously. The structure of the above-described radiating fin is completed by the following steps.

  Step 1 (sp1): At least one through hole 114 is drilled on the main body 11 (see FIG. 1).

  Step 2 (sp2): The stretched body 115 is formed in the penetrating direction from the outer edge of the through hole 114 (see FIG. 1).

  Step 3 (sp3): The heat pipe 12 is passed through the through hole 114, and the outer surface 121 of the heat pipe 12 is made to correspond to the stretched body 115.

  Step 4 (sp4): Pressing the stretched body 115 using the press device 30 to form a plurality of convex portions 1151 and concave portions 1152 on the stretched body 115, thereby extending the stretched body 115 to the outer surface of the heat pipe 12. It is firmly fixed to 121 (see FIGS. 10 and 11).

  Step 1 (sp1) and step 2 (sp2) are preferably performed by general press molding.

  Please refer to FIG. 10 and FIG. As shown in FIGS. 10 and 11, the press device 30 includes at least a first plate body 31 and a second plate body 32. The first plate body 31 has at least one semicircular first concave groove 311, and first tooth portions 312 are formed in the first concave groove 311 at intervals, and each first Between the tooth portions 312, there is a first space 313. The second plate body 32 has at least one second concave groove 321 that is semicircular, and second tooth portions 322 are formed in the second concave groove 321 at intervals, and each second A second space 323 is provided between the tooth portions 322.

  The first plate body 31 and the second plate body 32 are respectively disposed at least on both outer sides of the stretched body 115, and the first plate body 31 and the second plate body 32 are closely connected in the direction of the stretched body 115. By pressing and pressing the first concave groove 311 and the second concave groove 321 onto the stretched body 115, a plurality of convex portions 1151 and concave portions 1152 are formed on the outer surface of the stretched body 115.

  Please refer to FIG. Reference numeral 11A in FIG. 12 indicates that it corresponds to the portion 11A in FIG. As shown in FIG. 12, the convex portion 1151 is formed corresponding to the first space 313 and the second space 323, and the concave portion 1152 corresponds to the first tooth portion 312 and the second tooth portion 322. To be molded. Through the above-described steps, an interference portion is formed between the stretched body 115 and the outer surface 121 of the heat pipe 12, and the stretched body 115 is tightly fixed to the outer surface 121 of the heat pipe 12.

  The point that the present invention improves the prior art by the above-described structure and manufacturing method will be described below.

  1. By forming a plurality of convex portions 1151 and concave portions 1152 on the elongated body 115 on the main body 11 of the heat radiating fin, an interference portion is formed between the outer surface 121 of the heat pipe 12. Thereby, since the extending body 115 is tightly fixed to the outer surface 121 of the heat pipe 12, the main body 11 and the heat pipe 12 can be tightly coupled.

  2. By forming a plurality of convex portions 1151 and concave portions 1152 on the elongated body 115 on the main body 11 of each heat radiating fin, an interference portion is formed between the outer surface 121 of the heat pipe 12. Thereby, since the extending | stretching body 115 is closely fixed to the outer surface 121 of the heat pipe 12, the main body 11 and the heat pipe 12 can be couple | bonded closely, and the heat radiator 10 with high stability can be comprised. it can.

  3. After passing the heat pipe 12 through the main body 11 of the heat radiating fin, the outer surface 121 of the heat pipe 12 is formed by pressurizing the elongated body 115 on the main body 11 of the heat radiating fin to form a plurality of convex portions 1151 and concave portions 1152. An interference part is formed between the two. Thereby, since the extending | stretching body 115 is closely fixed to the outer surface 121 of the heat pipe 12, the method which can couple | bond the main body 11 and the heat pipe 12 closely can be provided.

  The above description shows the embodiment of the present invention and does not limit the present invention. Accordingly, those skilled in the art can make various changes and modifications without departing from the spirit of the present invention, and the protection scope of the present invention is based on the contents described in the claims.

DESCRIPTION OF SYMBOLS 10 Radiator 11 Main body 112 1st side surface 113 2nd side surface 114 Through-hole 115 Extended body 1151 Convex part 1152 Concave part 117 Flow path 12 Heat pipe 121 Outer surface 30 Press apparatus 31 1st plate body 311 1st ditch | groove 312 1st tooth part 313 1st space 32 2nd plate body 321 2nd ditch | groove 322 2nd tooth part 323 2nd space

Claims (8)

A through hole is drilled on the main body, an elongated body is formed by protruding from the outer edge of the through hole in the penetrating direction, a heat pipe is passed through the through hole, and an outer surface of the heat pipe is made to correspond to the elongated body. A structure of a radiating fin that presses on the stretched body by a pressing device, forms a plurality of convex portions and recesses in the stretched body, and tightly fixes the stretched body to the outer surface of the heat pipe,
The pressing device has at least a first plate and a second plate,
The first plate body has at least one first concave groove, and first tooth portions are formed in the first concave groove with a space between each first tooth portion. Has a first space,
The second plate body has at least one second concave groove, and second tooth portions are formed in the second concave groove with a space between each second tooth portion. Has a second space . A structure of a heat radiating fin. The first plate body and the second plate body are arranged at least on both outer sides of the stretched body, and the first plate body and the second plate body are pressed tightly in the direction of the stretched body, The structure of the radiation fin according to claim 1 , further comprising a step of pressing the first concave groove and the second concave groove onto the elongated body . The heat dissipation fin structure according to claim 1 or 2, wherein the first concave groove and the second concave groove are semicircular. The structure of a heat radiating fin according to claim 1, wherein the convex portion is adjacent to the concave portion, and an interference portion is formed between the convex portion and the concave portion and the heat pipe. Comprising at least one heat pipe and a plurality of radiating fins;
Each of the heat dissipating fins in the plurality of heat dissipating fins has a through hole formed on the main body, and an elongated body is formed by protruding from the outer edge of the through hole in the penetrating direction, and a heat pipe is passed through the through hole. The outer surface of the heat pipe is made to correspond to the stretched body, and the top of the stretched body is pressed by a press device to form a plurality of protrusions and recesses on the stretched body, and the stretched body is in close contact with the outer surface of the heat pipe A radiator that is fixed to
The pressing device has at least a first plate and a second plate,
The first plate body has at least one first concave groove, and first tooth portions are formed in the first concave groove with a space between each first tooth portion. Has a first space,
The second plate body has at least one second concave groove, and second tooth portions are formed in the second concave groove with a space between each second tooth portion. Has a second space. The first plate body and the second plate body are arranged at least on both outer sides of the stretched body, and the first plate body and the second plate body are pressed tightly in the direction of the stretched body, 6. The radiator according to claim 5, further comprising a step of pressing the first concave groove and the second concave groove on the elongated body. The radiator according to claim 5 or 6, wherein the first concave groove and the second concave groove are semicircular. The radiator according to claim 5, wherein the convex portion is adjacent to the concave portion, and an interference portion is formed between the convex portion and the concave portion and the heat pipe.

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