TWI508650B - Heat sink - Google Patents

Description

Heat sink

The invention relates to a heat dissipating device, in particular to a heat dissipating device having a dust removing structure.

In recent years, with the development of the electronics industry, the performance of electronic components has been continuously improved, and the amount of heat generated has also increased. Therefore, it is necessary to dissipate heat from electronic components. When the conventional heat sink dissipates heat, the heat sink fan draws dust and dust from the air to the heat sink group. With the long-term use of the heat sink, the dust and dust will accumulate on the heat sink group, causing the fan to blow the wind into the heat sink group, which affects the heat dissipation performance of the heat sink.

Therefore, it is necessary to provide a heat sink that can effectively prevent dust from collecting from the heat sink.

A heat dissipating device includes a heat sink group, a fan, and a casing for fixing the heat sink group and the fan, wherein the heat sink group is composed of a first heat sink and a second heat sink which are alternately arranged, and the adjacent first heat sink and the second heat sink An air flow passage is formed between the sheets, and the heat sink group includes an air inlet. The airflow generated by the rotation of the fan is blown into the heat sink group by the air inlet of the heat sink group, wherein the second heat sink is opened at a position close to the air inlet. The slot, the slotted opening faces the air inlet, and the adjacent airflow passage communicates through the slot at the air inlet to increase the aperture.

Since the airflow passage aperture at the air inlet is widened, when the airflow carries the dust and dust to the heat sink group, no blockage occurs, and the dust and dust can smoothly enter the heat dissipation. The sheet group can flow along the airflow within the heat sink group and out of the heat sink group. Slotting also helps the dander and dust to flow out of the heat sink set more easily.

10‧‧‧heating device

20‧‧‧ Heat sink set

201‧‧‧Air inlet

202‧‧‧ Groove

21‧‧‧First heat sink

210, 220‧‧‧ ontology

211, 221‧‧‧ lower folding board

212, 222‧‧‧Upper folding board

2123‧‧‧ third upper folding board

2122, 2222‧‧‧ second upper folding board

2121, 2221‧‧‧ first upper folding board

22‧‧‧second heat sink

2201‧‧‧ slotting

2202‧‧‧ hook groove

30‧‧‧heat pipe

40‧‧‧Fan

50‧‧‧ Shell

501‧‧‧floor

502‧‧‧ side panels

51‧‧‧ screw holes

52‧‧‧Fixed Department

53‧‧‧ buckle

54‧‧‧ 扣板

Figure 1 shows a perspective view of a heat sink of the present invention.

2 is an enlarged view of a heat sink group of the heat sink of FIG. 1.

Figure 3 is a partial exploded view of the heat sink assembly of Figure 2.

Figure 4 is an enlarged view of one of the fins of the heat sink group of Figure 2.

Fig. 5 is an enlarged view showing another heat sink of the heat sink group of Fig. 2.

Referring to FIG. 1, a perspective view of a heat sink 10 of the present invention is shown, including a heat sink assembly 20, a plurality of heat pipes 30, a fan 40, and a housing 50 for securing the heat sink assembly 20 and the fan 40. The condensation section of the heat pipe 30 is mounted on the fin group 20. The side of the heat sink set 20 adjacent to the fan 40 has an air inlet 201. The outer casing 50 includes a bottom plate 501, a side edge 502, and a top plate (not shown). The bottom plate 501 and the side edges 502 are integrally formed or welded together. The fan 40 is mounted within the outer casing 50. The outer casing 50 has a substantially circular arc and is flared. The fan 40 is mounted on a circular arc portion of the outer casing 50, and the radius of the circular arc of the outer casing 50 is larger than the radius of the fan 40. The front end of the outer arc of the casing extends toward the foremost fin of the fin group 20, and the rear end of the arc of the outer casing extends toward the last fin of the fin group 20. The opening of the outer casing 50 toward the fin group 20 just matches the air inlet 201. The bottom plate 501 is connected to the bottom surface of the heat sink group 20, and the two ends of the side edge 502 are respectively connected to the frontmost one and the last heat sink of the heat sink group 20, so that the heat sink group 20 and the outer casing 50 are integrally fixed. The fan 40 is fixed to the bottom plate 501, and the wind generated by the fan 40 is blown into the inside of the fin group 20 from the air inlet 201. The side 502 includes a plurality of screw holes 51 for the top A plate (not shown) is secured to the side 502. The side 502 further includes a plurality of fixing portions 52, a buckle 53, and a gusset 54 for engaging the heat sink 10 with other components. When the fan 40 is energized and rotated, wind is generated. Since the outer casing 50 only has an opening facing the fin group 20, the wind generated by the fan 40 is blown into the fin group 20 by the air inlet 201.

Referring again to FIGS. 2-3, an enlarged view and a partially disassembled view of the heat sink assembly 20 of the heat sink 10 of FIG. 1 are illustrated. The heat sink group 20 is formed by arranging a plurality of first heat sinks 21 and a plurality of second heat sinks 22 apart. A groove 202 is formed on the top surface of the heat sink group 20, and the condensation section of the heat pipe 30 is mounted in the groove 202. In the present embodiment, the heat sink 10 includes three heat pipes 30. The width of the groove 202 is larger than the total width of the three heat pipes 30. The first heat sink 21 and the second heat sink 22 are both metal sheet metal stampings, and the two are fastened together to form the heat sink group 20 .

Referring to FIG. 4 again, an enlarged view of the first heat sink 21 of the heat sink group 20 of FIG. 2 is shown. The first heat sink 21 includes a body 210, a lower flap 211 away from the top surface, and an upper flap 212 adjacent to the top surface. In the present embodiment, the body 210 has a thickness of 0.2 mm and the lower flap 211 has a width of 1.2 mm. The left side of the body 210 is a bevel extending from a top to a bottom away from the right side, and a rounded corner is formed near the lower boundary (not shown). The right boundary of the body 210 is perpendicular to the lower boundary, and the upper boundary has a curved shape with an intermediate depression corresponding to the groove 202 of the heat sink group 20. The lower flap 211 extends horizontally from the lower boundary of the body 210 to the vertical body 210. The upper folding plate 212 is divided into a first upper folding plate 2121, a second upper folding plate 2122, and a third upper folding plate 2123 from left to right. The first upper folding plate 2121, the second upper folding plate 2122, and the third upper folding plate 2123 all extend perpendicular to the body 210. The width of the first upper folding plate 2121 and the second upper folding plate 2122 is equal to the width of the lower folding plate 211. The width of the upper upper flap 2123 is equal to twice the width of the lower flap 211. The first upper flap 2121 is parallel to the lower flap 211, than the second upper flap 2122 and the third upper flap 2123 is slightly higher. The second upper flap 2122 is located at a recess of the upper boundary of the body 210 and extends perpendicular to the body 210 along the shape of the recess. The second upper folding plate 2122 is adjacent to the left end of the first upper folding plate 2121 and extends smoothly upwardly with a rounded corner. The second upper folding plate 2122 is adjacent to the right end of the first upper folding plate 2121, but the two are not in contact with each other, that is, the left end of the second upper folding plate 2122 is smaller than the first end. The upper flap 2121 is slightly shorter. The middle and right ends of the second upper flap 2122 extend horizontally along the recess of the body 210. The right upper end of the second upper folding plate 2122 is connected to the third upper folding plate 2123. The left end of the third upper folding plate 2123 is horizontally connected to the second upper folding plate 2122, and the middle portion and the right end thereof extend obliquely upward to the right boundary. The right end of the third upper folding plate 2123 is equal to the height of the first upper folding plate 2121, that is, the left and right ends of the upper folding plate 212 are at the same height, and are recessed in the middle. The first fin 21 is entirely recessed in a central position, and the right end is enlarged in shape.

Referring again to FIG. 5, an enlarged view of the second heat sink 22 of the heat sink assembly 20 of FIG. 2 is shown. The second heat sink 22 includes a body 220, a lower flap 221 away from the top surface, and an upper flap 222 adjacent the top surface. The body 220 has a thickness of 0.2 mm, and the lower flap 221 and the upper flap 222 have a width of 1.2 mm. The left end of the body 220 has the same shape as the body 210 of the first fin 21, and the left side is also a bevel extending from the top to the bottom in a direction away from the right side. The lower flap 221 of the second fin 22 has the same shape as the lower flap 211 of the first fin 21. The upper flap 222 of the second fin 22 includes only the first upper flap 2221 and the second upper flap 2222, and has the same shape and structure, as compared with the upper flap 212 of the first fin 21 . The body 220 has a slot 2201 opening to the right. The side of the slot 2201 has a key shape. The opening of the slot 2201 is enlarged to the right and terminates at the upper flap 222 and the lower flap 221 . The upper end of the opening of the slot 2201 of the body 220 of the second heat sink 22 terminates at a position where the second upper flap 2122 of the first heat sink 21 is connected to the third upper flap 2123. The lower end of the opening of the slot 2201 is at the right end of the lower boundary 221 to the right of the upper end. The slot 2201 has a hook-shaped slot 2202 protruding downwardly from the flap 221.

When the first heat sink 21 is combined with the second heat sink 22, the first heat sink 21 is located behind the second heat sink 22, that is, the opposite direction in which the upper flap 221 and the lower flap 222 are bent and extended. An air flow passage having a width of 1.0 mm is formed between each of the first fins 21 and the adjacent second fins 22. Since the width of the third upper flap 2123 of the first fin 21 extends twice the width of the lower flap 211, the second upper flap 2222 of the combined second fin 22 just snaps into the first fin 21 The left end portion of the third upper flap 2123 collectively forms a groove 202. The first heat sink 21 and the second heat sink 22 are separated from each other to form a heat sink group 20 . The distance between each fin of the heat sink group 20 is 1.0 mm. Since the opening of the slot 2201 is expanded to the right to the upper and lower flaps 222 and 221, the adjacent airflow passages at the position of the air inlet 201 of the heat sink group 20 are connected. Increase the total width to 2.2mm. Since the airflow passage of the air inlet 201 has a large aperture, when the airflow drives the dust and dust through the air inlet 201 of the heat sink group 20, no blocking occurs, and the dust and dust can smoothly enter the heat sink group 20 and The flow in the fin group 20 along the airflow flows out of the fin group 20. The slot 2201 helps the dander and dust to flow out of the heat sink set 20 more easily.

Since the dust and dust generated by the airflow generated by the fan 40 can smoothly enter and flow out of the heat sink group 20, the heat sink group 20 of such design does not cause the accumulation of dust and dust at the air inlet 201, and the heat sink 10 The heat dissipation performance is effectively maintained.

201‧‧‧Air inlet

202‧‧‧ Groove

21‧‧‧First heat sink

22‧‧‧second heat sink

Claims (9)

A heat dissipating device includes a heat sink group, a fan, and a casing for fixing the heat sink group and the fan, wherein the heat sink group is composed of a first heat sink and a second heat sink which are alternately arranged, and the adjacent first heat sink and the second heat sink An air flow passage is formed between the sheets, and the heat sink group includes an air inlet. The air flow generated by the rotation of the fan is blown into the heat sink group by the air inlet of the heat sink group. The improvement is that the second heat sink is opened near the air inlet. Slotted, the slotted opening faces the air inlet, and the adjacent airflow passage is connected by the slot at the air inlet to increase the aperture. The heat sink group has a top surface, and the top surface has a groove, the first heat sink And the second fins respectively include a body, a lower flap away from the top surface, and an upper flap adjacent to the top surface, the lower flap and the upper flap extending perpendicularly to the body. The heat dissipating device of claim 1, wherein: the upper flap of the first fin comprises a first upper flap, a second upper flap and a third upper flap, the first upper flap being parallel to the lower The folding plate extends along the groove, and the third upper folding plate connects the second upper folding plate and extends obliquely upward to the height of the first upper folding plate. The heat dissipating device of claim 2, wherein: the upper flap of the second fin comprises a first upper flap and a second upper flap, the first upper flap being parallel to the lower flap, the second upper The flap extends along the groove. The heat dissipating device of claim 3, wherein the first fin and the second fin have the same body thickness, and the lower flap has the same width. The heat dissipating device of claim 4, wherein the first upper flap and the second upper flap have a width equal to a width of the lower flap. The heat sink of claim 4, wherein the width of the upper flap of the second fin is equal to the width of the lower flap. The heat dissipating device of claim 5, wherein: the third upper flap of the first fin extends beyond the first upper flap of the first fin, and the width of the third upper flap of the first fin It is twice the second upper flap of the second heat sink. The heat dissipating device of claim 7, wherein the second upper flap of the second fin abuts the third upper flap of the first fin and extends beyond the second upper flap of the first fin part. The heat dissipating device of claim 1, wherein the heat pipe further comprises a heat pipe, and the condensation section of the heat pipe is mounted in the groove of the heat sink group.