CN107734937B

CN107734937B - Heat sink device

Info

Publication number: CN107734937B
Application number: CN201711122226.9A
Authority: CN
Inventors: 不公告发明人
Original assignee: Linyi Kangtai Shoe Factory
Current assignee: Linyi Kangtai Shoe Factory
Priority date: 2012-06-18
Filing date: 2012-06-18
Publication date: 2021-09-14
Anticipated expiration: 2032-06-18
Also published as: TW201400714A; CN108135117B; CN103517610B; CN103517610A; TWI546456B; CN108135117A; CN107734937A

Abstract

A heat dissipation device comprises a heat dissipation fin group, a cover body fixedly connected with the heat dissipation fin group and a centrifugal fan arranged on the cover body, wherein an air outlet of the centrifugal fan is opposite to the heat dissipation fin group, the centrifugal fan comprises a fan frame and an impeller group contained in the fan frame, the fan frame comprises a bottom plate and a side wall extending out of the bottom plate, at least one protruding portion is arranged on one of the side wall of the centrifugal fan and the cover body, a limiting portion matched with the protruding portion is arranged on the other one of the side wall of the centrifugal fan and the cover body, and the protruding portion slides in the axial direction of the centrifugal fan relative to the limiting portion and is contained in the limiting portion to position the cover body relative to the centrifugal fan. In the invention, the convex part and the limiting part matched with the convex part are jointed in a sliding accommodating mode, so that the use number of screws can be reduced, and the centrifugal fan is more convenient to mount and dismount.

Description

Heat sink device

The application is a divisional application of a patent with the application number of 2012102007650 and the application date of 2012, 06 and 18, and the invention creates a name of a heat dissipation device.

Technical Field

The present invention relates to heat dissipation devices, and particularly to a heat dissipation device for dissipating heat generated by an electronic component.

Background

With the development of the electronic industry, the operation speed of electronic components such as a central processing unit (cpu) is greatly increased, and the amount of heat generated by the electronic components is also increased.

The conventional heat dissipation device generally includes a centrifugal fan, a heat dissipation fin set disposed at an air outlet of the centrifugal fan, a vapor chamber fixed to the electronic component, and a heat pipe connecting the vapor chamber and the heat dissipation fin set. When the electronic element is radiated, the soaking plate absorbs the heat generated by the electronic element, the heat absorbed by the soaking plate is transferred to the radiating fin group through the heat pipe, and the centrifugal fan operates to generate airflow and blow the airflow to the radiating fin group and take away the heat transferred to the radiating fin group.

In order to stably mount the centrifugal fan on the heat dissipation device, the centrifugal fan is usually fixed by locking a plurality of screws, however, the phenomenon that the sliding teeth and the screw holes are not easily aligned is easily generated in the process of mounting the centrifugal fan, and the process of dismounting the centrifugal fan is complicated.

Disclosure of Invention

In view of the above, it is desirable to provide a heat dissipation device that is easy to assemble and disassemble.

A heat dissipation device comprises a heat dissipation fin group, a cover body fixedly connected with the heat dissipation fin group and a centrifugal fan arranged on the cover body, wherein an air outlet of the centrifugal fan is opposite to the heat dissipation fin group, the centrifugal fan comprises a fan frame and an impeller group contained in the fan frame, the fan frame comprises a bottom plate and a side wall extending out of the bottom plate, at least one protruding portion is arranged on one of the side wall of the centrifugal fan and the cover body, a limiting portion matched with the protruding portion is arranged on the other one of the side wall of the centrifugal fan and the cover body, and the protruding portion slides in the axial direction of the centrifugal fan relative to the limiting portion and is contained in the limiting portion to position the cover body relative to the centrifugal fan.

Compared with the traditional locking mode of a plurality of screws, the heat dissipation device has the advantages that the protruding parts and the limiting parts matched with the protruding parts are connected in a sliding accommodating mode, so that the number of the screws can be effectively reduced, and the centrifugal fan is more convenient to mount and dismount.

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

Drawings

Fig. 1 is a perspective assembly view of a heat dissipating device according to a first embodiment of the present invention.

Fig. 2 is an exploded perspective view of the heat sink shown in fig. 1.

Fig. 3 is an exploded perspective view of the heat dissipation device shown in fig. 1 from another perspective.

Fig. 4 is an enlarged view of a portion IV of the heat dissipating device shown in fig. 2.

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

Fig. 6 is an exploded perspective view of the heat sink shown in fig. 5.

Fig. 7 is an exploded perspective view of the heat sink of fig. 5 from another perspective.

Fig. 8 is an enlarged view of a portion VIII of the heat dissipating device shown in fig. 6.

Description of the main elements

Centrifugal fan

10, 10a

Fan wheel set 12

Base plate 13

Air inlets

131, 31

Bracket 132

Side wall 14

First side plate 141

Body 142

Mounting parts

1421, 1421a

Second side plate 143

Air outlet 144

Fan frame 15

Heat radiating fin set 20

Groove 21

First cavity 22

Second chamber 23

Connecting piece 24

Cover 30

Lugs

32, 32a

Screw hole 321

First position-

limiting parts

33, 33a

Second stopper portions 34, 34a

First extension 331

Step 332

Second extension 3321

Third extension 3322

Receiving

grooves

333, 343

Heat pipe 50

First projecting

portion

60, 60a

Second projecting

portion

61, 61a

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

Referring to fig. 1 to fig. 3, the heat dissipating device of the first embodiment of the present invention includes a heat dissipating fin set 20, a cover 30 fixedly connected to the heat dissipating fin set 20, two heat pipes 50 embedded in the heat dissipating fin set 20, and a centrifugal fan 10 disposed on the cover 30.

The centrifugal fan 10 includes a fan frame 15 and a fan set 12 accommodated in the fan frame 15. The fan frame 15 includes a bottom plate 13 and a sidewall 14 extending downward from the periphery of the bottom plate 13. The bottom plate 13 is a flat plate with a U-shaped outer contour. The side walls 14 are arranged perpendicular to the bottom plate 13. A circular air inlet 131 is formed at 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 assembly 12 is fixed to the bracket 132.

The side wall 14 is a semi-enclosed structure. The side wall 14 includes an arc-shaped body 142, and a first side plate 141 and a second side plate 143 extending from two ends of the body 142. The first side plate 141 and the second side plate 143 are both linear and parallel to each other. A rectangular air outlet 144 is disposed between the first side plate 141 and the second side plate 143 at the non-closed end of the side wall 14. A mounting portion 1421 protrudes outwardly from the arc-shaped body 142 of the sidewall 14. In this embodiment, the mounting portion 1421 is a cylindrical boss. The mounting portion 1421 is formed 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 protrusion 60 and a second protrusion 61. Specifically, the first protrusion 60 and the second protrusion 61 are respectively disposed at one ends of the first side plate 141 and the second side plate 143 away from the bottom plate 13. In the present embodiment, the first projection 60 and the second projection 61 are each a projection rib. The end of the first protrusion 60 facing the air outlet 144 of the centrifugal fan 10 is flush with the air outlet 144 of the centrifugal fan 10. In order to avoid interference with the heat pipe 50, an end of the second protrusion 61 facing the air outlet 144 of the centrifugal fan 10 is spaced from the air outlet 144 of the centrifugal fan 10.

The cover 30 is a cover plate with a U-shaped outer contour. The cover 30 has a circular air inlet 31 at the center corresponding to the air inlet 131 on the bottom plate 13. The cover 30 has a protrusion 32 formed on its periphery corresponding to the mounting portion 1421 of the sidewall 14. The lug 32 is provided with a screw hole 321 corresponding to a fixing hole (not labeled) of the mounting part 1421. The cover 30 has a first limiting portion 33 and a second limiting portion 34 disposed on its periphery corresponding to the first protrusion 60 and the second protrusion 61, respectively. Specifically, the first position-limiting portion 33 and the second position-limiting portion 34 are respectively disposed on two parallel sides of the cover 30. The connecting line of the centers of the first position-limiting portion 33, the second position-limiting portion 34 and the protruding lug 32 forms an acute triangle, so as to facilitate the sufficient fixation of the cover 30 and the fan frame 15.

Referring to fig. 4, the first position-limiting portion 33 is a substantially U-shaped position-limiting groove. The first position-limiting portion 33 includes a first extending portion 331 extending horizontally outward from the side of the cover 30 and a step portion 332 bent inward from the end of the first extending portion 331. The step portion 332 includes a second extension portion 3321 extending from the end of the first extension portion 331 in a direction perpendicular to the first extension portion 331 and a third extension portion 3322 extending from the end of the second extension portion 3321 horizontally and inwardly. The first extension 331 and the third extension 3322 are disposed parallel to the cover 30. The second extending portion 3321 is disposed perpendicular to the cover 30. The first extension 331 and the step 332 together define a receiving slot 333 for receiving the first protrusion 60.

In the embodiment, the second position-limiting portion 34 has the same structure as the first position-limiting portion 33, and the second position-limiting portion 34 is also provided with an accommodating groove 343 (fig. 2) for accommodating the second protrusion 61, and the structure of the second position-limiting portion 34 will not be described herein again.

Referring to fig. 2 again, a groove 21 is formed on a sidewall of the heat dissipating fin set 20. The groove 21 divides the heat sink fin assembly 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. A plurality of heat dissipation fins (not labeled) penetrating through the first cavity 22 and the second cavity 23 are arranged in the first cavity 22 and the second cavity 23 in parallel at intervals, and an air duct (not labeled) is formed between adjacent heat dissipation fins. One end of the cover 30 is fixed on the second cavity 23 of the heat sink fin set 20.

One end of each of the two heat pipes 50 of the heat dissipation module is embedded in the corresponding groove 21 of the heat dissipation fin set 20, and the other end of each of the two heat pipes 50 is thermally connected to an electronic component (not shown).

When the centrifugal fan 10 is installed in the heat dissipation device, one end of the cover 30 is fixed on the second cavity 23 of the heat dissipation fin set 20 by means of heat conduction adhesive bonding or soldering. One end of the two heat pipes 50 are embedded and fixed in the groove 21 of the heat dissipating fin set 20 side by side. One end of the air outlet 144 of the centrifugal fan 10 is disposed on the cover 30, and an external force is applied to the centrifugal fan 10, so that the centrifugal fan 10 moves relative to the heat dissipating fin set 20. The first protrusion 60 and the second protrusion 61 on the sidewall 14 of the centrifugal fan 10 slide relative to the first limiting portion 33 and the second limiting portion 34 on the cover 30 along the direction perpendicular to the axial direction of the centrifugal fan 10, and are accommodated in the accommodating groove 333 of the first limiting portion 33 and the accommodating groove 343 of the second limiting portion 34, so as to position the cover 30 relative to the centrifugal fan 10.

The outer surfaces of the first protrusion 60 and the second protrusion 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 moving in the horizontal direction relative to the cover 30. The air outlet 144 of the centrifugal fan 10 abuts against the heat dissipating fin set 20. Screws (not shown) are screwed into fixing holes (not shown) on the mounting part 1421 of the centrifugal fan 10 through the screw holes 321 of the lugs 32 of the cover 30 to lock the centrifugal fan 10 to the cover 30.

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, so that the centrifugal fan 10 moves away from the heat sink fin set 20. The first protrusion 60 and the second protrusion 61 of the centrifugal fan 10 slide out of the receiving groove 333 of the first limiting portion 33 and the receiving groove 343 of the second limiting portion 34 of the cover 30, respectively.

When an electronic component (not shown) is cooled, heat generated by the electronic component is transferred to the cooling fin set 20 through the two heat pipes 50. The centrifugal fan 10 sucks the air flow from the air inlet 131 and the air inlet 31 disposed at both sides of the fan set 12, blows the air flow from the air outlet 144 of the centrifugal fan 10 to the heat dissipating fin set 20, and takes away the heat of the heat dissipating fin set 20.

Fig. 5 to 8 show a heat dissipation device according to a second embodiment of the present invention. Unlike the first embodiment, the centrifugal fan 10a of the second embodiment has a semi-cylindrical rib formed on each of the first and

second protrusions

60a and 61a of the sidewall 14. The edge of the cover 30 is provided with a first limiting portion 33a and a second limiting portion 34a corresponding to the first protrusion 60a and the second protrusion 61a, respectively. The first and second stopper portions 33a and 34a are each a C-shaped stopper groove. The first and second position-limiting portions 33a and 34a extend horizontally outward from the side edges of the cover 30 and are bent inward to form a C-shaped position-limiting groove. The sidewall 14 of the centrifugal fan 10a protrudes outward to form two mounting portions 1421 a. The cover 30 has two lugs 32a disposed on its periphery corresponding to the two mounting portions 1421 a.

In the present invention, the

first protrusion

60, 60a and the

second protrusion

61, 61a are made of metal or plastic and are integrally formed with the fan frame 15. The first position-limiting

portions

33, 33a and the second position-limiting portions 34, 34a are made of metal or plastic and are integrally formed with the cover 30.

In the present invention, there is no limitation in the shape of the first and

second protrusions

60, 60a and 61, 61a, such as the first protrusion 60 being a square step, a triangular rib, or a wavy rib. The first position-limiting portion 33 of the cover 30 is correspondingly changed according to the cross-sectional shape of the first protrusion 60 to accommodate the first protrusion 60.

It is understood that the first protrusion 60 and the second protrusion 61 can be disposed on two parallel sides of the cover 30, and the first limiting portion 33 and the second limiting portion 34 are disposed on the side wall 14 of the centrifugal fan 10.

It is also understood that various other modifications and variations can 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 can be respectively disposed on the inner wall surfaces of the first side plate 141 and the second side plate 143 of the side wall 14 of the centrifugal fan 10, the first limiting portion 33 and the second limiting portion 34 are disposed on the upper surface of the cover 30 at intervals corresponding to the first protrusion 60 and the second protrusion 61, and all such modifications and variations are within the scope of the present invention.

Claims

1. The utility model provides a heat abstractor, including the radiating fin group, with radiating fin group fixed connection's lid and set up in centrifugal fan on the lid, centrifugal fan's air outlet is just right radiating fin group, centrifugal fan include a fan frame and accept in the impeller assembly in the fan frame, the fan frame include a bottom plate and by the lateral wall that the bottom plate extends out, its characterized in that: the centrifugal fan comprises a centrifugal fan body, a cover body and a side wall, wherein the side wall of the centrifugal fan body is provided with at least one protruding part, the other side of the side wall of the centrifugal fan body and the cover body is provided with a limiting part matched with the protruding part, the protruding part slides relative to the limiting part along the axial vertical direction of the centrifugal fan and is contained in the limiting part to position the cover body relative to the centrifugal fan, the side wall comprises an arc-shaped body and a first side plate and a second side plate, the first side plate and the second side plate extend from two tail ends of the body respectively, the protruding part is arranged on one of the first side plate and the second side plate of the side wall, the protruding part is arranged at one end, far away from a bottom plate, of the second side plate, of the protruding part, facing the air outlet of the centrifugal fan, keeps a distance from the air outlet of the centrifugal fan, the side wall of the radiating fin group is provided with a groove, and the groove divides the radiating fin group into a first cavity, The heat dissipation structure comprises a first cavity and a second cavity, wherein the first cavity is parallel to the first cavity, and a connecting piece is connected with the first cavity and the second cavity; the protruding part is a convex rib, the limiting part is a limiting groove, and the limiting part comprises a first extending part horizontally extending outwards from the side edge of the cover body and a step part bent inwards from the tail end of the first extending part; the stepped portion comprises a flat second extension portion extending from the tail end of the first extension portion along the direction perpendicular to the first extension portion and a flat third extension portion extending from the tail end of the second extension portion horizontally inwards, the first extension portion and the third extension portion are parallel to the cover body, and the second extension portion is perpendicular to the cover body.

2. The heat dissipating device of claim 1, wherein: the limiting part is arranged on the side edge of the cover body corresponding to the protruding part.

3. The heat dissipating device of claim 1, wherein: the first extending part and the step part of the limiting part enclose an accommodating groove, and the protruding part is accommodated in the accommodating groove of the limiting part.

4. The heat dissipating device of claim 1, wherein: the centrifugal fan is characterized in that an installation part is arranged on the side wall of the centrifugal fan, a lug is arranged on the cover body, a screw hole is formed in the lug, and a screw penetrates through the screw hole of the lug to be screwed on the installation part.

5. The heat dissipating device of claim 1, wherein: the protruding part comprises a first protruding part arranged on the first side plate and a second protruding part arranged on the second side plate, and the limiting part comprises a first limiting part and a second limiting part which correspond to the first protruding part and the second protruding part and are respectively arranged on two parallel sides of the cover body.