TW201400714A - Heat dissipation device - Google Patents

Abstract

A heat dissipation device includes a heat sink, a cover plate fixed on the heat sink and a centrifugal fan connected to the cover plate. The centrifugal fan includes a fan frame and an impeller mounted in the frame. The fan frame includes a base plate and a side wall extending downwardly from the base plate. An air outlet is defined between the side wall. The heat sink is located correspondingly besides the air outlet. At least a convex portion is formed on the side wall or the cover plate, and at least a baffle portion for receiving the convex portion is formed on the cover plate or the side wall corresponding to the convex portion. The convex portion is connected to the baffle portion in a sliding manner, along a direction perpendicular to an axis of the centrifugal fan.

Description

Heat sink

The present invention relates to a heat sink, and more particularly to a heat sink for dissipating heat from an electronic component.

With the development of the electronics industry, the computing speed of electronic components such as central processing units has been greatly increased, and the heat generated by them has also increased dramatically. In order to ensure the normal operation of electronic components, a heat sink is usually mounted thereon to The heat of the component is dissipated.

A conventional heat sink generally includes a centrifugal fan, a heat dissipating fin set disposed at an air outlet of the centrifugal fan, a heat equalizing plate fixed to the electronic component, and a heat pipe connecting the heat equalizing plate and the heat dissipating fin set. When the electronic component is dissipated, the soaking plate absorbs the heat generated by the electronic component, and the heat absorbed by the soaking plate is transferred to the fin group by the heat pipe, and the centrifugal fan operates to generate airflow and blows to the fin group, which will be transmitted. The heat to the heat sink fin group is taken away.

In order to stably install the centrifugal fan on the heat sink, a plurality of screws are usually screwed to fix the centrifugal fan. However, this fixing method is prone to the phenomenon that the sliding teeth and the screw holes are not easily aligned during the process of installing the centrifugal fan. The process of disassembling the centrifugal fan is also cumbersome.

In view of this, it is necessary to provide a heat sink that is easy to install and disassemble.

A heat dissipating device includes a heat dissipating fin set, a cover body fixedly connected to the heat dissipating fin set, and a centrifugal fan disposed on the cover body, the air outlet of the centrifugal fan is opposite to the heat dissipating fin set, and the centrifugal fan includes a a fan frame and a fan wheel set housed in the fan frame, the fan frame includes a bottom plate and a side wall extending from the bottom plate, and at least one protruding portion is disposed on one of the side wall of the centrifugal fan and the cover body The other side of the side wall of the centrifugal fan and the cover body is provided with a limiting portion that cooperates with the protruding portion, and the protruding portion slides relative to the limiting portion in a direction perpendicular to the axial direction of the centrifugal fan and is received in the limit. The cover is positioned relative to the centrifugal fan within the seat.

The protruding portion of the heat dissipating device of the present invention is slidably received in the limiting portion, which can effectively reduce the number of screws used, and the installation and disassembly of the centrifugal fan, as compared with the conventional method of fixing the centrifugal fan by means of a plurality of screws. More convenient.

The invention will now be further described with reference to specific embodiments with reference to the accompanying drawings.

Referring to FIG. 1 to FIG. 3 , the heat dissipation device of the first embodiment of the present invention includes a heat dissipation fin assembly 20 , a cover 30 fixedly connected to the heat dissipation fin assembly 20 , and the heat dissipation fin assembly. The two heat pipes 50 of 20 and a centrifugal fan 10 disposed on the cover body 30.

The centrifugal fan 10 includes a frame 15 and a wheel set 12 housed in the frame 15 . The frame 15 includes a bottom plate 13 and a side wall 14 extending downward from the periphery of the bottom plate 13. The bottom plate 13 is a flat plate having a U-shaped outer contour. The side wall 14 is disposed perpendicular to the bottom plate 13. A circular air inlet 131 is provided in the center of the bottom plate 13. A bracket 132 extends from the periphery of the circular air inlet 131 toward the center of the circular air inlet 131. The fan wheel set 12 is fixed to the bracket 132.

The side wall 14 is a semi-closed structure. The side wall 14 includes an arcuate body 142 and a first side panel 141 and a second side panel 143 extending outwardly from both ends of the body 142. The first side plate 141 and the second side plate 143 are both linear and parallel to each other. An unvented end of the side wall 14 defines a rectangular air outlet 144 between the first side plate 141 and the second side plate 143. A mounting portion 1421 protrudes outwardly from the curved body 142 of the side wall 14. In this embodiment, the mounting portion 1421 is a cylindrical boss. The mounting portion 1421 is provided with a fixing hole (not shown).

The first side plate 141 and the second side plate 143 respectively protrude horizontally outward to form a first protruding portion 60 and a second protruding portion 61. Specifically, the first protruding portion 60 and the second protruding portion 61 are respectively disposed on a side of the first side plate 141 and the second side plate 143 away from the bottom plate 13 . In the embodiment, the first protruding portion 60 and the second protruding portion 61 are protruding ribs. One end of the first protruding portion 60 facing the air outlet 144 of the centrifugal fan 10 is flush with the periphery of the air outlet 144 of the centrifugal fan 10. In order to avoid interference with the heat pipe 50, the second projection 61 is kept at a certain distance from the air outlet 144 of the centrifugal fan 10 toward one end of the air outlet 144 of the centrifugal fan 10.

The cover 30 is a plate body having a U-shaped outer contour. The center of the cover 30 is provided with a circular air inlet 31 corresponding to the air inlet 131 on the bottom plate 13. A lug 32 is disposed on the peripheral edge of the cover 30 corresponding to the mounting portion 1421 on the side wall 14. The lug 32 is provided with a screw hole 321 corresponding to a fixing hole (not shown) of the mounting portion 1421. A first limiting portion 33 and a second limiting portion 34 are respectively disposed on the periphery of the cover body 30 corresponding to the first protruding portion 60 and the second protruding portion 61. Specifically, the first limiting portion 33 and the second limiting portion 34 are respectively disposed on two parallel sides of the cover 30. The center of the first limiting portion 33, the second limiting portion 34, and the lug 32 form an acute triangle to facilitate the sufficient fixation of the cover 30 and the frame 15.

Referring to FIG. 4 , the first limiting portion 33 is a U-shaped limiting slot. The first limiting portion 33 includes a first extending portion 331 extending horizontally outward from a side of the cover 30 and a step portion 332 bent inwardly from an end of the first extending portion 331. The step portion 332 includes a second second extending portion 3321 extending from a distal end of the first extending portion 331 in a direction perpendicular to the first extending portion 331 and extending horizontally inwardly from an end of the second extending portion 3321. A straight third extension 3322 emerges. The first extension portion 331 and the third extension portion 3322 are disposed in parallel to the cover body 30. The second extension portion 3321 is disposed perpendicular to the cover 30. The first extending portion 331 and the step portion 332 together define a receiving groove 333 for receiving the first protruding portion 60.

In this embodiment, the second limiting portion 34 is identical in structure to the first limiting portion 33. The second limiting portion 34 is also provided with a receiving slot 343 (FIG. 2) for receiving the second protruding portion. 61. Here, the structure of the second limiting portion 34 will not be described again.

Referring to FIG. 2 again, a recess 21 is defined in the sidewall of the heat dissipation fin assembly 20 . The groove 21 divides the heat dissipation fin group 20 into a first cavity 22, a second cavity 23 parallel to the first cavity 22, and a connecting member 24 connecting the first cavity 22 and the second cavity 23. . The first cavity 22 and the second cavity 23 are arranged in parallel with a plurality of heat dissipation fins (not labeled) extending through the first cavity 22 and the second cavity 23, and air channels are formed between the adjacent heat dissipation fins. (not marked). One end of the cover 30 is fixed to the second cavity 23 of the heat dissipation fin set 20 .

One end of the two heat pipes 50 of the heat dissipation module is embedded in the groove 21 of the heat dissipation fin group 20, and the other ends of the heat pipes 50 are respectively thermally connected to electronic components (not shown).

When the centrifugal fan 10 is mounted on the heat dissipating device, one end of the cover body 30 is fixed to the second cavity 23 of the heat dissipating fin group 20 by thermal conductive adhesive bonding or soldering. One end of the two heat pipes 50 is inserted and fixed side by side in the groove 21 of the heat dissipation fin group 20. One end of the air outlet 144 of the centrifugal fan 10 is placed on the cover 30, and an external force is applied to the centrifugal fan 10, and the centrifugal fan 10 moves relative to the heat dissipation fin group 20. The first protruding portion 60 and the second protruding portion 61 on the side wall 14 of the centrifugal fan 10 are perpendicular to the axial direction of the centrifugal fan 10 with respect to the first limiting portion 33 and the second limiting portion 34 on the cover body 30. The direction is slid and received in the receiving groove 333 of the first limiting portion 33 and the receiving groove 343 of the second limiting portion 34 to position the cover 30 relative to the centrifugal fan 10.

The outer surfaces of the first protruding portion 60 and the second protruding portion 61 are closely attached to the inner surfaces of the first limiting portion 33 and the second limiting portion 34 to prevent the centrifugal fan 10 from being horizontal with respect to the cover 30 Move in the direction. The air outlet 144 of the centrifugal fan 10 is in contact with the heat dissipation fin group 20. A screw (not shown) is screwed into the fixing hole (not shown) of the mounting portion 1421 of the centrifugal fan 10 through the screw hole 321 of the lug 32 of the cover 30 to lock the centrifugal fan 10 to the cover. 30 on.

When the centrifugal fan 10 is detached from the heat sink, the screw (not shown) for fixing the centrifugal fan 10 is removed, and an external force is applied to the centrifugal fan 10, and the centrifugal fan 10 moves away from the heat radiating fin group 20. The first protruding portion 60 and the second protruding portion 61 of the centrifugal fan 10 are respectively slid out from the receiving groove 333 of the first limiting portion 33 of the cover 30 and the receiving groove 343 of the second limiting portion 34.

When heat is dissipated to the electronic component (not shown), the heat generated by the electronic component is transferred to the heat sink fin set 20 by the two heat pipes 50. The centrifugal fan 10 draws airflow from the air inlet 131 and the air inlet 31 provided on both sides of the fan wheel set 12 and blows the airflow from the air outlet 144 of the centrifugal fan 10 toward the heat dissipation fin group 20, and heats the heat dissipation fin group 20. take away.

Referring to FIG. 5 to FIG. 8 simultaneously, a heat sink according to a second embodiment of the present invention is shown. The difference from the first embodiment of the present invention is that a first projection 60a and a second projection 61a provided on the side wall 14 of the centrifugal fan 10a in the second embodiment are half-cylindrical ribs. The edge of the cover 30 is provided with a first limiting portion 33a and a second limiting portion 34a corresponding to the first protruding portion 60a and the second protruding portion 61a, respectively. The first limiting portion 33a and the second limiting portion 34a are C-shaped limiting slots. The first limiting portion 33a and the second limiting portion 34a extend horizontally outward from the side edges of the cover 30 and are bent inward to form a C-shaped limiting slot. The side wall 14 of the centrifugal fan 10a protrudes outward to form two mounting portions 1421a. The peripheral edge of the cover 30 is provided with two lugs 32a corresponding to the two mounting portions 1421a.

In the present invention, the first protruding portions 60, 60a and the second protruding portions 61, 61a are made of a metal material or a plastic material and are integrally formed with the fan frame 15. The first limiting portions 33, 33a and the second limiting portions 34, 34a are made of a metal material or a plastic material and are integrally formed with the lid body 30.

In the present invention, the shape of the first projections 60, 60a and the second projections 61, 61a is not limited, for example, the first projections 60 are square steps, triangular ribs or wavy ribs. The first limiting portion 33 of the cover body 30 is correspondingly changed according to the cross-sectional shape of the first protruding portion 60 for receiving the first protruding portion 60.

It can be understood that, in the present invention, the first protruding portion 60 and the second protruding portion 61 may also be respectively disposed on two parallel sides of the cover 30, and the first limiting portion 33 and the second limiting portion 34 are respectively disposed. Correspondingly, it is disposed on the side wall 14 of the centrifugal fan 10.

In addition, various other corresponding changes and modifications may be made by those skilled in the art according to the technical concept of the present invention. For example, the first protrusion 60 and the second protrusion 61 may be respectively disposed on the centrifugal fan. The first side plate 141 of the side wall 14 of the first side plate 141 and the inner side wall of the second side plate 143, the upper surface of the cover body 30 is spaced apart from the first protrusion portion 60 and the second protrusion portion 61 by a first limiting portion 33 and The second limiting portion 34, and all such changes and modifications are intended to fall within the scope of the appended claims.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be included in the following claims.

10, 10a. . . Centrifugal fan

12. . . Fan wheel set

13. . . Bottom plate

131, 31. . . Air inlet

132. . . support

14. . . Side wall

141. . . First side panel

142. . . Ontology

1421, 1421a. . . Installation department

143. . . Second side panel

144. . . Air outlet

15. . . Fan frame

20. . . Heat sink fin set

twenty one. . . Groove

twenty two. . . First cavity

twenty three. . . Second cavity

twenty four. . . Connector

30. . . Cover

32, 32a. . . Lug

321. . . Screw hole

33, 33a. . . First limit

34, 34a. . . Second limit

331. . . First extension

332. . . Step

3321. . . Second extension

3322. . . Third extension

333, 343. . . Storage slot

50. . . Heat pipe

60, 60a. . . First projection

61, 61a. . . Second projection

1 is a perspective assembled view of a heat sink according to a first embodiment of the present invention.

2 is a perspective exploded view of the heat sink shown in FIG. 1.

3 is a perspective exploded view of another perspective view of the heat sink shown in FIG. 1.

Figure 4 is an enlarged view of a portion IV of the heat sink shown in Figure 2.

Fig. 5 is a perspective assembled view of a heat sink according to a second embodiment of the present invention.

6 is a perspective exploded view of the heat sink shown in FIG. 5.

FIG. 7 is a perspective exploded view of another perspective view of the heat sink of FIG. 5. FIG.

Figure 8 is an enlarged view of a portion VIII of the heat sink shown in Figure 6.

12. . . Fan wheel set

13. . . Bottom plate

131, 31. . . Air inlet

132. . . support

141. . . First side panel

142. . . Ontology

1421. . . Installation department

144. . . Air outlet

20. . . Heat sink fin set

twenty one. . . Groove

twenty two. . . First cavity

twenty three. . . Second cavity

30. . . Cover

32. . . Lug

321. . . Screw hole

33. . . First limit

34. . . Second limit

333, 343. . . Storage slot

50. . . Heat pipe

60. . . First projection

Claims (10)

A heat dissipating device includes a heat dissipating fin set, a cover body fixedly connected to the heat dissipating fin set, and a centrifugal fan disposed on the cover body, wherein an air outlet of the centrifugal fan is facing the heat dissipating fin set, and the centrifugal fan includes a frame and a fan wheel set housed in the frame, the frame includes a bottom plate and a side wall extending from the bottom plate, and the improvement is: the side wall of the centrifugal fan and one of the cover bodies are disposed At least one protruding portion, the side wall of the centrifugal fan and the other of the cover body are provided with a limiting portion that cooperates with the protruding portion, and the protruding portion is perpendicular to the axial direction of the centrifugal fan along the limiting portion Sliding and receiving in the limiting portion to position the cover relative to the centrifugal fan. The heat dissipating device of claim 1, wherein the side wall comprises an arc-shaped body and a first side plate and a second side plate respectively extending from the two ends of the body, the protruding portion being disposed on the side wall One of the first side plate and the second side plate. The heat dissipating device of claim 2, wherein the protruding portion is disposed at an end of the first side plate away from the bottom plate, and the protruding portion faces an end of the centrifugal fan air outlet and an air outlet of the centrifugal fan Flush. The heat dissipating device of claim 2, wherein the protruding portion is disposed at an end of the second side plate away from the bottom plate, and the protruding portion faces an end of the centrifugal fan air outlet and an air outlet of the centrifugal fan Keep a distance. The heat dissipating device according to any one of claims 2 to 4, wherein the limiting portion is disposed on a side of the cover corresponding to the protruding portion. The heat dissipating device of claim 5, wherein the protruding portion is a rib, the limiting portion is a limiting groove, and the limiting portion comprises a first extension extending horizontally outward from a side edge of the cover body. a portion and a step portion bent inward by the end of the first extension portion. The heat dissipating device of claim 6, wherein the step portion includes a straight second extending portion extending from a distal end of the first extending portion in a direction perpendicular to the first extending portion, and the a flat third extension extending horizontally inwardly from the end of the extension portion, the first extension portion and the third extension portion being parallel to the cover body, the second extension portion being perpendicular to the cover body. The heat dissipating device of claim 7, wherein the first extending portion and the step portion of the limiting portion enclose a receiving groove, and the protruding portion is received in the receiving groove of the limiting portion. The heat dissipating device of claim 2, wherein the side wall of the centrifugal fan is provided with a mounting portion, the cover body is provided with a lug, and the lug is provided with a screw hole through which the screw passes The screw hole is screwed onto the mounting portion. The heat dissipating device of claim 2, wherein the protruding portion comprises a first protruding portion disposed on the first side plate and a second protruding portion disposed on the second side plate, the limiting portion The first limiting portion and the second limiting portion are respectively disposed on the two parallel sides of the cover body corresponding to the first protruding portion and the second protruding portion.