JP3185306U - Caulking heat sink - Google Patents

Abstract

The present invention provides a caulking type heat sink with greatly improved heat dissipation efficiency.
A plurality of fin plates (221) are caulked and coupled to a base body (21) at intervals, and a flow path (214) for passing a working fluid (L) is formed inside the base body (21). The base body 21 has a contact surface 211 that contacts the heat dissipation object 8 and absorbs heat therefrom, and an installation surface 212 that is the opposite surface of the contact surface 211. A plurality of fixing portions 213 protrude from the installation surface 212 at intervals, and the fin plates 221 are caulked and coupled to the fixing portions 213.
[Selection] Figure 1

Description

  The present invention relates to a heat sink, and more particularly to a heat sink in which a fin plate is caulked to a base.

  As a heat sink for radiating heat generated during operation of an electronic device or the like, generally, an integrally formed type in which a main body portion and a fin portion are integrally formed by aluminum extrusion molding, and a main body portion and a fin portion are combined. For example, a caulking type is used in which one end of the fin portion is fitted into a flange-like groove provided separately and provided integrally with the main body portion. Among these, the caulking type has an advantage that the manufacturing cost is relatively low as compared with the integral molding type.

  FIG. 4 shows a caulking heat sink disclosed in Patent Document 1 (Taiwan Registered Utility Model M419386). The heat sink 1 includes a base 11 and a plurality of fin plates 12, and a fixing portion 111 that is shaped like a ridge from a pair of protrusions protruding on a surface of the base 11 at a predetermined interval. However, a plurality of fin plates 12 are provided at intervals, and one end of the fin plate 12 is closely fitted in a groove formed between a pair of protrusions of each fixing portion 111, and then the fixing portion 111 is further finned. The base plate 11 is caulked and joined by pressing the plate 12 so as to sandwich the plate 12 or by crushing one end of the fin plate 12 that is closely fitted.

  In use, when the surface of the base 11 of the heat sink 1 on the side where the fin plate 12 is not provided is brought into contact with the electronic element 9 that generates heat, the heat generated by the electronic element 9 is converted to the base 11. , The heat can be transmitted to the fin plate 12 and diffused to the outside by heat exchange between the fin plate 12 and external air. Such a heat dissipation method is called an air cooling method.

Taiwan registered utility model M419386

  However, in the air cooling using the heat sink as described above, the heat radiation depends only on the heat exchange between the fin plate and the air. For example, when the electronic element generates a large amount of heat, there is a problem that the heat radiation is delayed. In the case of the caulking type, the fin plate and the base are in close contact with each other but are not integrally connected, so that the heat conduction can be somewhat slower than that of the integral type.

  The present invention has been made in view of these problems, and an object thereof is to provide a caulking type heat sink in which the heat radiation efficiency is greatly improved.

In order to achieve the above object, the present invention provides the following means. That is,
Provided is a heat sink characterized in that a plurality of fin plates are caulked and joined to a base body at intervals, and a flow path for passing a working fluid is formed inside the base body.

  The base body may have a contact surface that contacts the heat dissipation object and absorbs heat from the heat dissipation object, and an installation surface that is the opposite surface of the contact surface. It is preferable that a plurality of fixing portions to which the fin plates are caulked and coupled are protruded at intervals.

  In addition, the base body connects a pair of contact portions each having a contact surface that contacts the heat dissipation target and absorbs heat from the heat dissipation target, and opposite surfaces of the contact surfaces of the pair of contact portions. At least one surface of which is an installation surface, and a plurality of fixing portions projecting from the installation surface at intervals, and each of the fin plates is fixed to each of the fixing plates. You may comprise so that it may be crimped | bonded by the part.

  Moreover, it is preferable that the flow path is formed inside the connection part, and it is more preferable that the flow path is also formed inside each contact part.

  Incidentally, the working fluid refers to a fluid that can be circulated in the flow path by the action of heat absorption from the heat radiation target and heat radiation to the fin plate, for example, a refrigerant. In addition, when the compressed liquid refrigerant is injected into the flow path as a working fluid, it is preferable that the liquid and the gas obtained by evaporating the liquid are present without completely filling the flow path. If it does so, a phase change will be performed continuously between a liquid phase and a gaseous phase, the whole working fluid will be circulated, and the effect | action of the said heat absorption and the said heat radiation can be accelerated | stimulated further. Note that the liquid phase and the gas phase may both be in the same flow path or in different flow paths.

  According to the above configuration, since the flow path is formed inside the base body, the working fluid can be put into this flow path so as to flow and recirculate in the flow path. The heat dissipation effect from the base body to the outside is greatly improved.

It is a longitudinal section showing a 1st embodiment of a heat sink concerning the present invention. It is a longitudinal cross-sectional view which shows 2nd Embodiment of the heat sink which concerns on this invention. It is a longitudinal cross-sectional view which shows 3rd Embodiment of the heat sink which concerns on this invention. It is a longitudinal cross-sectional view which shows the conventional crimping type heat sink.

  Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, constituent elements that are common to the embodiments and have substantially the same functions and configurations are denoted by the same reference numerals, and redundant description is provided only when necessary.

(First embodiment)
FIG. 1 shows a first embodiment of a heat sink according to the present invention. The heat sink 2 is caulked and coupled to a base body 21 made of metal and formed in a plate shape so as to be in contact with the heat dissipation object 8, and a surface of the base body 21 opposite to the side in contact with the heat dissipation object 8. A plurality of fin plates 221.

  The base body 21 has a contact surface 211 that contacts the heat dissipation object 8 and absorbs heat therefrom, and an installation surface 212 that is the opposite surface of the contact surface 211. A plurality of fixing portions 213 protrude from the installation surface 212 at intervals, and the fin plates 221 are caulked and coupled to the fixing portions 213. Specifically, each fixing portion 213 is formed in a bowl shape by a pair of substantially parallel protrusions protruding at a predetermined interval, and each fin plate 221 is interposed between the pair of protrusions. It is caulked and joined by tightly fitting one end. Note that, as the caulking and bonding mentioned here, for example, rivets may be used.

  A plurality of flow paths 214 for passing the working fluid L (see FIG. 1) are formed inside the base body 21. During use, the heat generated by the heat dissipation object 8 is transmitted through the contact surface 211 and accumulated in the base body 21. At this time, the working fluid L in the flow path 214 absorbs the heat and flows. Heat accumulated in the base body 21 can be conducted in a large amount and quickly. The heat of the heat radiating object 8 is conducted by the working fluid L, but is also conducted from the contact surface 211 side to the installation surface 212 side by the metal forming the base body 21, and further released to the outside air through the fin plate 221. be able to.

  In addition, when using a refrigerant | coolant as the working fluid L, each flow path 214 may be formed so that the one end may be opened outside. By comprising in this way, each flow path 214 can be connected with a cooling pipe (not shown), and also these cooling pipes can be connected with a cooling device (not shown). As a result, the work fluid L can be recirculated in such a manner as to repeatedly absorb and evaporate the heat in each flow path 214 and to be liquefied by being cooled in the cooling pipe. The effect can be greatly increased.

  The circuit design of the cooling device and the cooling pipe as described above can be freely adjusted according to the type and size of the heat dissipation object 8, for example, when the heat dissipation object 8 is a machine or a CPU in a computer. Can also be adapted accordingly.

With the above configuration, the heat sink according to the present embodiment has the following advantages.
(1) Significant improvement in heat dissipation effect Since the flow path 214 is formed in the base 21, the heat transmitted to the base body 21 is quickly squeezed by the flow of the working fluid L in the flow path 214. Since it can be transmitted to 221 or transmitted to the cooling pipe, it is possible to keep the temperature of the base body 21 at a temperature lower than that of the heat dissipation object 8 and prevent heat dissipation from being delayed.
(2) The manufacturing cost can be reduced. For example, in the conventional caulking type heat sink 1 as shown in FIG. 4, when using a working fluid as a refrigerant in order to increase the heat dissipation effect, In order to store the working fluid, it is necessary to attach a heat radiating member provided separately from the base 11. As described above, the number of necessary members increases and the manufacturing cost increases, and a gap formed between the members adversely affects heat conduction. On the other hand, according to the caulking heat sink 2 according to the present invention, since the flow path 214 for flowing the working fluid L is formed inside the base body 21 itself, it is necessary to separately provide a heat dissipation member having the flow path. As a result, manufacturing costs are reduced.

(Second Embodiment)
FIG. 2 shows a second embodiment of a heat sink according to the present invention. Also in the present embodiment, the heat sink 2 includes a base body 21 and a plurality of fin plates 221 that are caulked and coupled to the base body 21 as in the first embodiment, but differs from the first embodiment. Is that the base body 21 is formed in an H-shape. Hereinafter, a configuration different from the first embodiment will be described in detail.

  The base body 21 is disposed substantially parallel to each other, and has a pair of flat plate-like contact portions 216 and 216 each having the above-described contact surface 211 facing away from each other, and the pair of contact portions 216, 216 is configured by a flat connecting portion 215 that connects opposite surfaces of the contact surfaces 211, that is, inwardly facing surfaces. Further, both sides of the connecting portion 215 are the installation surfaces 212 described above. That is, the fixing part 213 and the fin plate 221 are provided on both surfaces of the connecting part 215. In addition, the installation surface 212 may be provided only on one surface instead of both surfaces of the connection part 215 as illustrated.

  In the present embodiment, the above-described flow path 214 is formed inside the connecting portion 215 in the base body 21.

  With the above configuration, the heat sink 2 according to the present embodiment has two contact surfaces 211, so that it can be used simultaneously for two heat dissipation objects 8 as shown in FIG. The heat of each heat radiation object 8 is transmitted to the connection part 215 connected to these through both the contact parts 216 and 216. At this time, as described above in the first embodiment, the work fluid L (FIG. 1) in the flow path 214 is repeatedly refluxed, so that the heat transferred to the connecting portion 215 is quickly transferred to the fin plate 221. Since the heat is exhausted to the outside air by air cooling, the heat dissipation effect is greatly improved.

  In addition, in this embodiment, although the structure of the base body 21 was made into an H shape like illustration by connecting each middle of each contact part 216 with the connection part 215, the lower end of each contact part 216 is connected. It is also possible to configure a U-shape by connecting with the part 215.

(Third embodiment)
FIG. 3 shows a third embodiment of a heat sink according to the present invention. Also in this embodiment, the heat sink 2 includes a base body 21 formed in an H shape and a plurality of fin plates 221 caulked to the base body 21 as in the second embodiment. The difference from the second embodiment is that the channel 214 is formed not only inside the connecting portion 215 but also inside each contact portion 216. Thereby, since the total amount of the working fluid flowing through the flow path 214 can be increased, heat conduction is further improved.

Also in the present embodiment, similarly to the second embodiment, the shape of the base body 21 may be U-shaped as well as H-shaped.
In summary, according to the heat sink 2 according to the present invention, since the flow path 214 is formed inside the base body 21, the work fluid L flows and recirculates in the flow path 21 4 so that heat can be quickly generated. This can be transmitted to the fin plate 221, thereby greatly improving the heat dissipation effect.

  As mentioned above, although preferred embodiment of this invention was described, this invention is not limited to this, It cannot be overemphasized that it can change variously in the range which does not deviate from the summary.

2 heat sink 21 base body 211 contact surface 212 installation surface 213 fixing portion 214 flow path 215 connection portion 216 contact portion 221 fin plate 8 heat radiation target L working fluid

Claims (6)

A plurality of fin plates are caulked and joined to the base body at intervals,
A heat sink characterized in that a flow path for passing a working fluid is formed inside the base body. The base body has a contact surface that contacts the heat dissipation object and absorbs heat from the heat dissipation object, and an installation surface that is the opposite surface of the contact surface,
2. The heat sink according to claim 1, wherein a plurality of fixing portions protrude from the installation surface at intervals, and the fin plates are caulked and coupled to the fixing portions. . The base body connects a pair of contact portions each having a contact surface that contacts the heat dissipation target and absorbs heat from the heat dissipation target, and connects the opposite surfaces of the contact surfaces of the pair of contact portions, at least And one side of the connecting part is an installation surface,
2. The heat sink according to claim 1, wherein a plurality of fixing portions protrude from the installation surface at intervals, and the fin plates are caulked and coupled to the fixing portions. . The heat sink according to claim 3, wherein the flow path is formed inside the connecting portion. The heat sink according to claim 4, wherein the flow path is also formed inside each of the contact portions. The pair of contact portions are arranged substantially in parallel so that the contact surfaces face each other,
The heat sink according to any one of claims 3 to 5, wherein both sides of the connecting portion serve as the installation surface.

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