TWI489077B - Heat sink - Google Patents

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 continuous development of the electronics industry and information technology, the information processing capabilities of electronic devices are becoming stronger and stronger, the integration of electronic components is becoming higher and higher, and the amount of heat generated by them is increasing. Therefore, an efficient heat dissipation device is required. Allows heat to diverge quickly and evenly, ensuring that the electronics are functioning properly.

The heat sink is generally used in the industry to dissipate electronic components. Please refer to FIG. 1 as a conventional heat sink 110. The heat sink 110 includes a plurality of parallel fins 20, and the fins are arranged in a straight line. Each heat sink 20 includes a body 22 and a two-folded edge 24 extending in the same direction along opposite sides of the body 22. A fastening member 242 having a receiving hole 244 is formed on each of the opposite sides of each of the flanges 24. When the heat sink 110 is assembled, the heat sinks 20 are arranged side by side, and the fastening member 242 of the rear heat sink 20 is engaged with the receiving hole 244 of the preceding heat sink adjacent thereto, thereby assembling the same. Heat sink 110. At this time, the main bodies 22 of the fins 20 are arranged in parallel so that an air flow passage is formed between the adjacent two main bodies 22, and the folded edges 24 on opposite sides of the main body 22 abut against each other to form two opposite planes.

When the heat sink 110 is used, a fan (not shown) is usually placed on the side of the heat sink having the air flow passage, so that the generated airflow passes through the air flow passage to the heat sink. 20 of the heat is taken away. When the airflow is operated along the airflow passage, since it has absorbed a part of the heat of the fins 20 located in the front portion of the airflow passage, the temperature thereof has risen, and the heat dissipation in the rear portion of the airflow passage is not increased in the case where the airflow intensity is not increased. The heat exchange of the sheet 20 is reduced, so that the temperature of the portion of the fins 20 cannot be effectively taken away. Thereby, it is easy to form a hot spot on the heat sink 110 to cause the electronic component to burn.

In view of this, it is necessary to provide a heat sink that can enhance heat dissipation efficiency.

A heat sink includes a plurality of stacked heat sinks, and an air flow passage for airflow is formed between two adjacent heat sinks. Each heat sink includes a first body and a second body in a direction of airflow. The body is offset from the second body by a distance in the stacking direction, and the first body and the second body are provided with an opening, and each of the fins includes two folds formed by bending from the upper and lower sides thereof. The hem includes a first connecting portion connected to the first body, a second connecting portion connected to the second body portion, and a transition portion connecting the first connecting portion and the second connecting portion, the first connecting portion of each hem The second connecting portion and the transition portion extend in the same direction. The first connecting portion and the second connecting portion are disposed in parallel on the same plane and are coplanar with the transition portion. The edge of the transition portion, the first connecting portion and the first portion The two connecting portions collectively enclose the opening.

Compared with the prior art, the present invention realizes that the heat sinks are staggered by folding the heat sink into a line shape, thereby forcibly increasing the air interference flow at the staggered portion, breaking the boundary layer, and increasing the heat dissipation efficiency.

110‧‧‧ radiator

20‧‧‧ Heat sink

22‧‧‧Ontology

24‧‧‧Folding

242‧‧‧ Fasteners

244‧‧‧ receiving holes

100‧‧‧heatsink

10‧‧‧ Heat sink

12‧‧‧Ontology

14‧‧‧Folding

122‧‧‧First Ontology

124‧‧‧Second ontology

141‧‧‧First connection

143‧‧‧Second connection

145‧‧‧Transition Department

142‧‧‧Fittings

144‧‧‧ receiving hole

146‧‧‧stops

1442‧‧‧first groove

1444‧‧‧second groove

1422‧‧‧First bulge

1424‧‧‧second bulge

16‧‧‧ openings

30‧‧‧First runner

40‧‧‧Second runner

1 is an assembled, isometric view of a conventional heat sink.

2 is a perspective assembled view of a heat sink according to an embodiment of the present invention.

3 is a perspective view of the adjacent two heat sinks of FIG. 2 separated.

4 is a schematic illustration of airflow through the heat sink of FIG. 2.

Referring to FIG. 2 and FIG. 3 together, the heat sink 100 in one embodiment of the present invention is shown. The heat sink 100 is formed by stacking and bonding a plurality of heat sinks 10 by snapping. The heat sink 10 is made of a material having good thermal conductivity, such as copper, aluminum or the like, and includes a body 12 and two folded edges 14 extending perpendicularly from the opposite sides of the body 12 in the same direction. In the embodiment, the heat sink 10 is integrally stamped and bent.

Each of the flanges 14 includes a first connecting portion 141 having a rectangular shape, a second connecting portion 143 having a rectangular shape, and a transition portion 145 connecting the first connecting portion 141 and the second connecting portion 143. The first connecting portion 141 and the second connecting portion 143 are disposed in parallel on the same plane and are coplanar with the transition portion 145 . The widths of the first connecting portion 141 and the second connecting portion 143 are equivalent. The width at which the first connecting portion 141 and the second connecting portion 143 are displaced is smaller than the width of the first connecting portion 141. The transition portion 145 of the heat sink 10 and the transition portion 145 of the adjacent heat sink 10 have a structure that is integrated with each other. In the present embodiment, the transition portion 145 has a parallelogram shape, and a pair of sides connected to the first connection portion 141 and the second connection portion 143 are equal in width to the first connection portion 141 and the second connection portion 143. A fastening member 142 protrudes from the central portion of the first connecting portion 141 and the second connecting portion 143 in the same direction. A receiving hole 144 is defined in each of the first connecting portion 141 and the second connecting portion 143 . The receiving hole 144 is disposed corresponding to the fastening member 142. In this embodiment, the fastening member 142 includes a rectangular first protrusion 1422 extending from a side of the flange 14 away from the body 12 and extending coplanar from the middle of the first protrusion 1422. A second protrusion 1424 having a rectangular shape. The first protrusions 1422 and the second protrusions 1424 together form a structure having a "convex" shape. The receiving hole 144 and the fastening component 142 Correspondingly, a rectangular first groove 1442 disposed on the flange 14 and a rectangular second groove 1444 disposed in the middle of the first protrusion 1422 are included. The first recess 1442 is in communication with the second recess 1444 and houses the first protrusion 1422 and the second protrusion 1424 therein, respectively. The second stopping portion 146 extends in parallel from the first connecting portion 141 and the second connecting portion 143 and passes through the second recess 1444 of the corresponding receiving hole 144 . The stop portion 146 is a square piece and its top end is coplanar with the flange 14. It can be understood that, in other embodiments, the receiving hole 144 and the fastening member 142 can be in any other shape as long as the corresponding fastening component can be received in the corresponding receiving hole 144, so that the adjacent heat sink can be stabilized. Just combine.

The body 12 includes an elongated first body 122 and an elongated second body 124 spaced apart from the first body 122 in sequence in the airflow direction. The first body 122 and the second body 124 are offset by a distance in the stacking direction of the fins. In this embodiment, they are different in plane and parallel. It can be understood that the first body 122 and the second body 124 are not limited to a flat shape, and may also have other suitable shapes such as an arc shape. A first flow channel 30 is formed between the two adjacent first bodies 122, and a second flow channel 40 is formed between the two adjacent second bodies 124. The first flow channel 30 is located at one end of the second flow channel 40. The two are connected in a staggered setting. The opposite sides of the first body 122 are perpendicularly connected to the sides of the two first connecting portions 141 of the two folded edges 14. The opposite sides of the second body 124 are perpendicularly connected to the sides of the two second connecting portions 143 of the two folded edges 14. An opening 16 is formed in the connection between the first body 122 and the second body 124 for airflow. The opening 16 extends through the entire height of the first body 122 and the second body 124 in this embodiment. The first body 122 and the second body 124 are connected only by the flanges 14.

When assembling the heat sink 100, the fastening piece 142 of one heat sink 10 is first aligned with the corresponding receiving hole 144 of the adjacent heat sink 10, and the fastening component 142 is received in the receiving hole 142. The first protrusion 1422 of the heat sink 10 is received in the first groove 1442 corresponding to the adjacent front heat sink 10; the second protrusion 1424 of the heat sink 10 is received in the hole 144. The second recess 1444 corresponding to the adjacent one of the heat sinks 10; the blocking portion 146 of the front heat sink 10 is also received in the first recess of the corresponding receiving hole 144 of the adjacent heat sink 10 In the slot 1442, the heat sink 10 is blocked from coming out of the front heat sink 10. Thereby, the fastening of the heat sink 10 and the adjacent heat sink 10 adjacent thereto can be completed. The rear is assembled accordingly, and the number of the heat sinks 10 is not limited, and may be arranged according to specific conditions.

Please refer to FIG. 4 , the heat sink 100 is assembled, the first body 122 of the heat sink 10 is arranged in parallel and the spacing is equal, and the second body 124 is also parallel and equidistantly disposed, and the adjacent first body 122 and adjacent The spacing between the second bodies 124 is the width of the first connecting portion 141 and the second connecting portion 143 of the flange 14. Since the first connecting portion 141 and the second connecting portion 143 are disposed in parallel on the same plane and the width of the misalignment is smaller than the width of the first connecting portion 141, the first connecting portion 141 and the second connecting portion 143 are on the same side as the first connecting portion 141 and the second connecting portion 143. The first body 122 and the second body 124, which are vertically connected, are alternately staggered, that is, the adjacent two first bodies 122 extend toward the middle of the opposite second flow channels 40 opposite thereto.

Since the first body 122 and the second body 124 are adjacent to each other to form an elongated opening 16, the adjacent two first flow channels 30 are in communication, and the adjacent two second flow channels 40 are also connected. The first-class road 30 is also connected to the second flow path 40.

Referring to FIG. 4 again, when the heat sink 100 is in use, a fan (not shown) is usually placed on one side of the second flow path 40 of the heat sink 100, so that the generated forced airflow flows from the second flow path 40. The first flow path 30. When the airflow from the second flow path 40 passes through the opening 16, since the left and right sides are not blocked, part of the airflow is transported toward the first flow path 30. At the same time as the movement, another part of the airflow diffuses toward the opposite sides of the second flow path 40. Since another portion of the airflow flowing out from the adjacent second flow path 40 impacts each other and is respectively interfered by the corresponding first body 122, the two air flows respectively pass through the first flow path 30 of the corresponding heat sink 10 and the adjacent ones. The first flow path 30 of a heat sink 10 finally flows out of the heat sink 100.

In the present invention, since the first flow path 30 and the second flow path 40 are staggered and the opening 16 is disposed therebetween, a disturbance is generated in the process of flowing the air flow to the first flow path 30 after flowing through the second flow path 40, thereby enhancing the The area in contact with the first body 122 is such that, compared with the conventional heat sink, it can take away more heat of the first body 122, breaking the conventional heat sink when the straight line is normally arranged, and the rear part of the air flow channel is partly The heat exchange is reduced and the heat dissipation performance is reduced.

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.

100‧‧‧heatsink

10‧‧‧ Heat sink

14‧‧‧Folding

16‧‧‧ openings

12‧‧‧Ontology

122‧‧‧First Ontology

124‧‧‧Second ontology

Claims (7)

A heat sink includes a plurality of heat sinks arranged in a stack, and an air flow passage for airflow is formed between two adjacent heat sinks. The improvement is that each heat sink includes a first body and a second body in a traveling direction of the air flow. The first body is offset from the second body by a distance in the stacking direction, and the first body and the second body are connected with an opening, and each fin includes two folds formed by bending from the upper and lower sides thereof. Each of the hem includes a first connecting portion connected to the first body, a second connecting portion connected to the second body portion, and a transition portion connecting the first connecting portion and the second connecting portion, each hem The first connecting portion, the second connecting portion and the transition portion extend in the same direction, and the first connecting portion and the second connecting portion are disposed in parallel on the same plane and are coplanar with the transition portion, and the edge of the transition portion is first The connecting portion and the second connecting portion collectively form the opening. The heat sink according to claim 1, wherein a first flow path is formed between the first bodies of the adjacent two heat sinks, and a second flow path is formed between the second bodies of the adjacent two heat sinks. The first flow path is located. One end of the second flow path and the first flow path and the second flow path are connected in a staggered manner, and the air flow flowing from the first flow path flows to different second flow paths. The heat sink of claim 1, wherein the opening extends through the entire height of the first and second bodies, and the first and second bodies are connected by the fold. The heat sink according to claim 1, wherein the first connecting portion and the second connecting portion have a rectangular shape and are disposed in parallel on the same plane and are coplanar with the transition portion. The heat sink according to claim 4, wherein the first connecting portion and the second connecting portion have a width corresponding to each other. The heat sink according to claim 5, wherein the transition portion of the flange and the transition portion of the adjacent flange are mutually integrated into a single structure. In the heat sink of the sixth aspect of the invention, the first connecting portion and the second connecting portion are further provided with at least one fastening component and at least one receiving hole, and the fastening component and the receiving hole have mutual mutual The structure of the buckle.