Heat dissipation fins and heat dissipation module

Abstract

The present invention provides a heat dissipation fin and a heat dissipation module. The heat dissipation fin includes a body and a flow guiding structure. The body has a first surface, a second surface opposite to each other, and an air flow hole penetrating through the first surface and the second surface. The flow guiding structure is inclinedly disposed on the first surface of the body. The flow guiding structure is inclinedly lapped on the first surface of the body and covers a part of the air flow hole. There is an air flow channel between the flow guiding structure and the first surface, wherein part of the air flow is adapted to flow along the first surface through the air flow channel, and part of the air flow flows through the air flow hole from the direction of the second surface.

Description

Technical Field

[0001] The present invention relates to a heat dissipation fin and a heat dissipation module, and particularly to a heat dissipation fin and a heat dissipation module with better heat dissipation efficiency. Background Art

[0002] It is quite common to use heat dissipation fins in combination with a fan for heat dissipation. In a known heat dissipation structure, the airflow blown by the fan flows through the heat dissipation fins, taking away the heat energy of the heat dissipation fins. The gaps between these heat dissipation fins form the flow channels of the airflow, and the flow channels of the airflow will be the height of the entire fin. Since the airflow will quickly heat up after flowing through the heat pipes passing through the heat dissipation fins. The high-temperature airflow still needs to pass through this flow channel to be discharged, and heat energy is easily accumulated in the flow channel, affecting the heat dissipation efficiency. Summary of the Invention

[0003] One object of the present invention is to provide a heat dissipation fin with better heat dissipation efficiency.

[0004] Another object of the present invention is to provide a heat dissipation module with the above-mentioned heat dissipation fin.

[0005] A heat dissipation fin of the present invention includes a body and a flow guiding structure. The body has a first surface, a second surface opposite to each other, and an air flow hole penetrating the first surface and the second surface. The flow guiding structure is obliquely lapped on the first surface of the body and covers a part of the air flow hole. There is an air flow channel between the flow guiding structure and the first surface, and part of the air flow is adapted to flow along the first surface through the air flow channel, while part of the air flow flows through the air flow hole from the direction of the second surface.

[0006] In an embodiment of the present invention, the extending direction of the above-mentioned air flow channel is perpendicular to the axial direction of the air flow hole.

[0007] In an embodiment of the present invention, the two ends of the above-mentioned flow guiding structure are respectively lapped on the first surfaces on both sides of the air flow hole. The flow guiding structure further includes at least one first inclined surface inclined relative to the body. The flow guiding structure has a first opening and a second opening opposite to each other. The air flow channel communicates with the first opening and the second opening, and the second opening is larger than the first opening. Part of the air flow is adapted to flow along the first surface through the first opening, through the air flow channel, and flow out from the second opening.

[0008] In an embodiment of the present invention, the above-mentioned flow guiding structure has at least one second inclined surface inclined relative to the body, and at least one second inclined surface is respectively located between the body and at least one first inclined surface. The inclination angle of at least one second inclined surface relative to the body is different from the inclination angle of at least one first inclined surface relative to the body.

[0009] In an embodiment of the present invention, the inclination angle of at least one of the second inclined surfaces relative to the body is greater than the inclination angle of at least one of the first inclined surfaces relative to the body.

[0010] In an embodiment of the present invention, at least one of the first inclined surfaces includes two first inclined surfaces, and at least one of the second inclined surfaces includes two second inclined surfaces. The two first inclined surfaces are adjacent to each other, and a ridge line is formed at the junction of the two first inclined surfaces. The two second inclined surfaces are respectively located between the body and the two first inclined surfaces and respectively overlap on the first surfaces on both sides of the air flow holes.

[0011] In an embodiment of the present invention, the body includes a plurality of heat pipe perforations, and these heat pipe perforations are arranged in two staggered rows up and down. The air flow holes and the flow guiding structure are located below at least one of the heat pipe perforations in the upper row.

[0012] In an embodiment of the present invention, the flow guiding structure and the body are integrated.

[0013] In an embodiment of the present invention, a plurality of heat pipes are adapted to be arranged in these heat pipe perforations and arranged in a first row located above and a second row located below. Part of the air flow is adapted to flow from beside the heat pipes in the first row along at least one of the second inclined surfaces to the heat pipes in the second row.

[0014] A heat dissipation module of the present invention includes a plurality of the above-mentioned heat dissipation fins arranged side by side, wherein the air flow holes of one of these heat dissipation fins correspond to the air flow holes of another of these heat dissipation fins. Among any two adjacent ones of these heat dissipation fins, the two heat dissipation fins can be divided into a first fin and a second fin. The flow guiding structure of the second fin is located between the second surface of the first fin and the first surface of the second fin. Part of the air flow located between the first fin and the second fin is adapted to flow along the first surface of the second fin through the air flow channel of the flow guiding structure of the second fin, and part of the air flow flows through the air flow hole of the first fin from the direction of the second surface of the first fin.

[0015] In an embodiment of the present invention, the flow guiding structure of the second fin extends into the air flow hole of the first fin.

[0016] Based on the above, compared with the known heat dissipation structure, the high-temperature air flow heated by the heat pipe still needs to flow through the gaps between the fins to be discharged from the ends of the fins, resulting in a long flow path and affecting the heat dissipation efficiency. The body of the heat dissipation fin of the present invention has air flow holes, allowing the air flow to directly leave through the air flow holes, greatly reducing the flow path length and improving the heat dissipation efficiency. In addition, since the guiding structure is obliquely lapped on the body and covers some of the air flow holes, and the design of the guiding structure in combination with the air flow channel and the air flow holes enables the air flow to be guided by the guiding structure and flow away from the fin, by dispersing the air flow direction, better heat dissipation efficiency is achieved. Similarly, in the heat dissipation module of the present invention, a part of the air flow between the first fin and the second fin is adapted to flow along the air flow channel of the guiding structure of the second fin, and a part of the air flow flows out from the second surface direction of the first fin through the air flow holes of the first fin in the direction away from the first surface of the first fin, and the air flow can be directly discharged from the side, increasing the heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is a schematic diagram of a heat dissipation module according to an embodiment of the present invention.

[0018] Figure 2 is Figure 1 a partial enlarged view of.

[0019] Figure 3 is along Figure 1 a partial cross-sectional schematic diagram of the A-A line segment of.

[0020] Figure 4 is Figure 1 a partial schematic diagram of the heat dissipation fin of the heat dissipation module of.

[0021] Figure 5 FIG. is a schematic diagram of a heat dissipation fin according to another embodiment of the present invention.

[0022] The reference numerals are as follows:

[0023] D1, D2: Extension directions

[0024] F1, F2: Air flows

[0025] 10: Heat dissipation module

[0026] 12: Heat pipe

[0027] 14: First row

[0028] 16: Second row

[0029] 100: Heat dissipation fin

[0030] 101: First fin

[0031] 102: Second fin

[0032] 110: Body

[0033] 112: First surface

[0034] 114: Second surface

[0035] 116: Airflow hole

[0036] 118: Heat pipe perforation

[0037] 120: Flow guiding structure

[0038] 122: First opening

[0039] 124: Second opening

[0040] 125: Airflow channel

[0041] 126: First inclined surface

[0042] 128: Second inclined surface

[0043] 129: Ridge line

[0044] 130: Arc-shaped body Detailed implementation manner

[0045] Figure 1 is a schematic diagram of a heat dissipation module according to an embodiment of the present invention. Figure 2 is Figure 1 a partial enlarged view. Figure 3 is along Figure 1 a partial cross-sectional schematic diagram of the A-A line segment of Figure 4 is Figure 1 a partial schematic diagram of the heat dissipation fins of the heat dissipation module of

[0046] Please refer to Figures 1 to 4 , in this embodiment, the heat dissipation module 10 includes a plurality of heat dissipation fins 100 and a plurality of heat pipes 12. These heat dissipation fins 100 are arranged side by side, and these heat pipes 12 are penetrated through these heat dissipation fins 100. In this embodiment, the heat dissipation fins 100 have a special design and have the effect of quickly dissipating heat, which will be described below.

[0047] In this embodiment, the heat dissipation fin 100 includes a body 110 and a flow guiding structure 120. As Figure 3 shown, the body 110 has opposite first surface 112, second surface 114 and an airflow hole 116 penetrating the first surface 112 and the second surface 114.

[0048] As Figure 4As shown, the flow guiding structure 120 is obliquely lapped on the first surface 112 of the body 110. In this embodiment, the flow guiding structure 120 is lapped on the first surface 112 of the body 110 on both sides of the air flow holes 116.

[0049] The flow guiding structure 120 covers a part of the air flow holes 116. In this embodiment, the flow guiding structure 120 covers, for example, more than half of the area of the air flow holes 116. For example, the flow guiding structure 120 covers 40% to 80% of the air flow holes 116. Through testing, such a design has good performance.

[0050] In addition, as Figure 3 shown, there is an air flow channel 125 between the flow guiding structure 120 and the first surface 112. The flow guiding structure 120 has opposite first opening 122 and second opening 124. The air flow channel 125 communicates with the first opening 122 and the second opening 124. The first opening 122 is, for example, an upper opening, closer to the position where the air flow enters. The second opening 124 is, for example, a lower opening, closer to the position where the air flow leaves, but the relative positions of the first opening 122 and the second opening 124 are not limited thereto. In addition, the axial direction D1 of the air flow holes 116 is perpendicular to the extending direction D2 of the air flow channel 125.

[0051] In addition, as Figure 3 shown, the flow guiding structure 120 further includes at least one first inclined surface 126 that is inclined with respect to the body 110. In this embodiment, the first inclined surface 126 is inclined downward, such that the second opening 124 is larger than the first opening 122. The first inclined surface 126 can be used to guide the flow direction of part of the air flow, so that part of the air flow can flow downward along the first inclined surface 126 and away from the first surface 112.

[0052] As Figure 4 shown, in this embodiment, the flow guiding structure 120 further has at least one second inclined surface 128 that is inclined with respect to the body 110. The at least one second inclined surface 128 is respectively located between the body 110 and the at least one first inclined surface 126. The inclination angle of the at least one second inclined surface 128 with respect to the body 110 is different from the inclination angle of the at least one first inclined surface 126 with respect to the body 110. Specifically, in this embodiment, the inclination angle of the second inclined surface 128 with respect to the body 110 is greater than the inclination angle of the first inclined surface 126 with respect to the body 110. In this embodiment, the second inclined surface 128 has a larger slope, so that the flow guiding structure 120 can protrude more from the first surface 112 of the body 110, so that there can be a larger space between the flow guiding structure 120 and the body 110 for the air flow to pass through.

[0053] In this embodiment, the air guide structure 120 is V-shaped. The at least one first inclined surface 126 includes two first inclined surfaces 126, and the at least one second inclined surface 128 includes two second inclined surfaces 128, wherein the two first inclined surfaces 126 are adjacent to each other, and an edge line 129 is formed at the intersection of the two first inclined surfaces 126, and the two second inclined surfaces 128 are respectively located between the body 110 and the two first inclined surfaces 126 and overlap the first surface 112 on both sides of the air flow hole 116. Of course, the form and shape of the air guide structure 120 are not limited to this.

[0054] It should be noted that, in the present embodiment, the first inclined surface 126 and the second inclined surface 128 are both inclined planes, but in other embodiments, the inclined surface of the air guide structure 120 may also be a curved surface, which is not limited to the drawings.

[0055] In this embodiment, the guide structure 120 is integrated with the body 110. The manufacturer can simultaneously produce the guide structure 120 and the air flow holes 116 by stamping. Of course, in other embodiments, the guide structure 120 and the body 110 can also be two components produced separately and then assembled together.

[0056] Please go back Figure 1 The body 110 of each heat sink fin 100 includes a plurality of heat pipe through holes 118, and the heat pipes 12 are disposed in the heat pipe through holes 118. The heat pipe through holes 118 are arranged in two rows in an alternating manner, namely, a first row 14 located relatively at the top and a second row 16 located relatively at the bottom. In this embodiment, the air flow holes 116 and the guide structure 120 are located below the first row 14 of heat pipe through holes 118.

[0057] In addition, by Figure 2 Matching Figure 4 It can be seen that the two outer contours of the two second inclined surfaces 128 are inclined to the left and right respectively, and can guide part of the airflow F1 to move from the heat pipes 12 located in the first row 14 along the outer contours of the two second inclined surfaces 128 to the lower left and lower right, and flow to the heat pipes 12 in the second row 16 to cool the heat pipes 12 in the second row 16.

[0058] The heat dissipation module 10 of this embodiment can be disposed on a heat source (such as a central processing unit or a display chip, not shown), wherein the heat pipe 12 is thermally coupled to the heat source. Therefore, the heat energy emitted by the heat source will be conducted to the heat pipe 12, and then to the heat dissipation fins 100. A fan can be disposed above the heat dissipation fins 100, and the airflow blown by the fan will flow between these heat dissipation fins 100 to take away the heat energy of the heat dissipation fins 100.

[0059] Therefore, in the heat dissipation module 10, the temperature of the heat pipe 12 is the highest, and the temperature of the part of the heat dissipation fins 100 close to the heat pipe 12 is higher. When the air flow blows from top to bottom, the relatively low-temperature air flow will quickly heat up after flowing through the heat pipe 12. In the known structure, the high-temperature air flow still needs to pass through the gaps between these fins before it can be discharged from the end (e.g., the lower end) of the fins, with a relatively long flow path, which affects the heat dissipation efficiency.

[0060] From Figure 2 With Figure 4 It can be seen that in this embodiment, part of the air flow F2 passes through the heat pipes 12 in the first column along the first surface 112, passes through the air flow channel 125 via the first opening 122, and flows out from the second opening 124, while part of the air flow passes through the air holes 116 from the direction of the second surface 114 and flows away in a direction away from the first surface 112. In this way, the high-temperature air flow can first flow out laterally from the air flow channel 125 and the air holes 116, without having to flow through the entire heat dissipation fins 100 before being discharged from the lower end of the heat dissipation fins 100, effectively improving the heat dissipation effect.

[0061] Please refer to Figure 3 , in this embodiment, the air holes 116 of these heat dissipation fins 100 of the heat dissipation module 10 communicate with and correspond to each other. Among any two adjacent ones of these heat dissipation fins 100 ( Figure 3 Taking the two leftmost heat dissipation fins 100 as an example, but any two adjacent heat dissipation fins 100 can be distinguished in this way), the two heat dissipation fins 100 can be divided into a first fin 101 and a second fin 102. The guiding structure 120 of the second fin 102 protrudes towards the first fin 101 and is located between the second surface 114 of the first fin 101 and the first surface 112 of the second fin 102.

[0062] The air flow flowing between the first fin 101 and the second fin 102 (the air flow beside the first surface 112 of the second fin 102) will flow along the gap between the first surface 112 of the second fin 102 and the second surface 114 of the first fin 101. Since the guiding structure 120 of the second fin 102 is located between the first fin 101 and the second fin 102, part of the air flow flows into the first opening 122 of the guiding structure 120 of the second fin 102 along the first surface 112 of the second fin 102, passes through the air flow channel 125, and flows out from the second opening 124. Since the guiding structure 120 is arranged slightly outwardly inclined relative to the body 110, the air flow in the guiding structure 120 will gradually change direction during the process of flowing along the inside of the guiding structure 120, and flow away in a direction away from the first surface 112 of the second fin 102, that is, towards the second surface 114 of the first fin 101, and then will flow out of the second opening 124 and pass through the air hole 116 of the first fin 101, flowing out in a direction away from the first surface 112.

[0063] For the first fin 101, the airflow beside the second surface 114 of the first fin 101 can flow out of the first surface 112 of the first fin 101 through the air holes 116 of the first fin 101 along the first inclined surface 126 and the second inclined surface 128 of the flow guiding structure 120 of the second fin 102.

[0064] It is worth mentioning that among any two adjacent ones of these heat dissipation fins 100, the flow guiding structure 120 of one heat dissipation fin 100 extends into the air holes 116 of the other heat dissipation fin 100. Specifically, in this embodiment, the flow guiding structure 120 of the second fin 102 extends into the air holes 116 of the first fin 101. Such a design can increase the probability that the airflow flows out of the first surface 112 of the first fin 101 through the air holes 116 of the first fin 101. Of course, in other embodiments, the flow guiding structure 120 of the second fin 102 may not extend into the air holes 116 of the first fin 101, and this is not limited thereto.

[0065] Figure 5 It is a schematic diagram of a heat dissipation fin according to another embodiment of the present invention. Please refer to Figure 5 , in this embodiment, the flow guiding structure 120 can also be an asymmetric structure. For example, the flow guiding structure 120 can be composed of a single first inclined surface 126, a single second inclined surface 128 and an arc-shaped body 130, and the number of the first inclined surface 126 and the second inclined surface 128 is not limited.

[0066] In summary, compared with the known heat dissipation structure, the high-temperature airflow heated by the heat pipe still needs to flow through the gap between the fins to be discharged from the end of the fins, and the flow path is long, which affects the heat dissipation efficiency. The body of the heat dissipation fin of the present invention has air holes, and the airflow can directly leave through the air holes, greatly shortening the flow path length and improving the heat dissipation efficiency. In addition, since the flow guiding structure is obliquely lapped on the body and covers part of the air holes. The design of the flow guiding structure in cooperation with the air flow channel and the air holes can enable the airflow to be guided by the flow guiding structure and flow in a direction away from the first surface (sideways), so as to increase the proportion of the airflow flowing out sideways, and thus have better heat dissipation efficiency. Similarly, in the heat dissipation module of the present invention, part of the airflow between the first fin and the second fin is adapted to flow along the flow guiding structure of the second fin, pass through the air holes of the first fin, and flow out from the first surface of the first fin, and the airflow can be directly discharged sideways, thereby increasing the heat dissipation efficiency.

Claims

1. A heat dissipation fin, comprising: A body having a first surface, a second surface opposite thereto, and an air flow hole penetrating the first surface and the second surface; And A diversion structure obliquely lapping on the first surface of the body and covering a part of the air flow hole. There is an air flow channel between the diversion structure and the first surface, wherein a part of the air flow is adapted to flow along the first surface through the air flow channel, and a part of the air flow flows through the air flow hole from the direction of the second surface; Wherein the diversion structure further comprises at least one first inclined surface inclined relative to the body; Wherein the diversion structure has at least one second inclined surface inclined relative to the body, and the at least one second inclined surface is respectively located between the body and the at least one first inclined surface, and the inclination angle of the at least one second inclined surface relative to the body is different from the inclination angle of the at least one first inclined surface relative to the body; Wherein the at least one first inclined surface includes two first inclined surfaces, the at least one second inclined surface includes two second inclined surfaces, the two first inclined surfaces are adjacent to each other, and an edge line is formed at the junction of the two first inclined surfaces. The two second inclined surfaces are respectively located between the body and the two first inclined surfaces and respectively lap on the first surfaces on both sides of the air flow hole.

2. The heat dissipation fin according to claim 1, wherein the extending direction of the air flow channel is perpendicular to the axial direction of the air flow hole.

3. The heat dissipation fin according to claim 1, wherein the two ends of the diversion structure respectively lap on the first surfaces on both sides of the air flow hole. The diversion structure has a first opening and a second opening opposite to each other. The air flow channel communicates with the first opening and the second opening, and the second opening is larger than the first opening. A part of the air flow is adapted to flow along the first surface through the first opening, through the air flow channel and flow out from the second opening.

4. The heat dissipation fin according to claim 1, wherein the inclination angle of the at least one second inclined surface relative to the body is greater than the inclination angle of the at least one first inclined surface relative to the body.

5. The heat dissipation fin according to claim 1, wherein the body includes a plurality of heat pipe perforations, and the plurality of heat pipe perforations are arranged in two staggered rows up and down. The air flow hole and the diversion structure are located below at least one of the plurality of heat pipe perforations in the upper row.

6. The heat dissipation fin according to claim 5, wherein a plurality of heat pipes are adapted to be arranged in the plurality of heat pipe perforations and arranged in a first row located above and a second row located below. A part of the air flow is adapted to flow from beside the plurality of heat pipes in the first row along the at least one second inclined surface and flow to the plurality of heat pipes in the second row.

7. A heat dissipation module, comprising: A plurality of heat dissipation fins arranged side by side, and each heat dissipation fin includes: A body having a first surface, a second surface opposite thereto, and an air flow hole penetrating the first surface and the second surface; And A diversion structure obliquely lapping on the first surface of the body and covering a part of the air flow hole. There is an air flow channel between the diversion structure and the first surface, Wherein the air flow hole of one of the heat dissipation fins corresponds to the air flow hole of another heat dissipation fin, Among any two adjacent ones of the plurality of heat dissipation fins, two of the heat dissipation fin areas are divided into a first fin and a second fin. The flow guiding structure of the second fin is located between the second surface of the first fin and the first surface of the second fin. A part of the air flow between the first fin and the second fin is adapted to flow along the first surface of the second fin through the air flow channel of the flow guiding structure of the second fin, and a part of the air flow flows through the air flow holes of the first fin from the direction of the second surface of the first fin; Wherein, the flow guiding structure further includes at least one first inclined surface inclined relative to the body; Wherein the flow guiding structure has at least one second inclined surface inclined relative to the body, and the at least one second inclined surface is respectively located between the body and the at least one first inclined surface, and the inclination angle of the at least one second inclined surface relative to the body is different from the inclination angle of the at least one first inclined surface relative to the body; Wherein the at least one first inclined surface includes two first inclined surfaces, the at least one second inclined surface includes two second inclined surfaces, the two first inclined surfaces are adjacent to each other, and a ridge line is formed at the junction of the two first inclined surfaces. The two second inclined surfaces are respectively located between the body and the two first inclined surfaces and respectively lap on the first surfaces on both sides of the air flow holes.

8. The heat dissipation module according to claim 7, wherein the flow guiding structure of the second fin extends into the air flow holes of the first fin.

9. The heat dissipation module according to claim 7, wherein the extending direction of the air flow channel is perpendicular to the axial direction of the air flow holes.

10. The heat dissipation module according to claim 7, wherein both ends of the flow guiding structure respectively lap on the first surfaces on both sides of the air flow holes. The flow guiding structure has a first opening and a second opening opposite to each other. The air flow channel communicates with the first opening and the second opening, and the second opening is larger than the first opening. A part of the air flow is adapted to flow along the first surface through the air flow channel via the first opening and flow out from the second opening.

11. The heat dissipation module according to claim 7, wherein the inclination angle of the at least one second inclined surface relative to the body is greater than the inclination angle of the at least one first inclined surface relative to the body.

12. The heat dissipation module according to claim 7, wherein the body of each heat dissipation fin includes a plurality of heat pipe through holes, and the plurality of heat pipe through holes are arranged in two staggered columns up and down. The air flow holes and the flow guiding structure are located below at least one of the plurality of heat pipe through holes in the upper column.

13. The heat dissipation module according to claim 12, further including a plurality of heat pipes arranged in the plurality of heat pipe through holes and arranged in a first column located above and a second column located below. A part of the air flow is adapted to flow from beside the plurality of heat pipes in the first column along the at least one second inclined surface to the plurality of heat pipes in the second column.

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