TWI711799B - Heat sink - Google Patents

Abstract

A heat dissipation device is suitable for deriving the heat energy of a heat source, and includes a carrying unit and a heat conducting unit connected to the carrying unit. The bearing unit includes a body suitable for setting the heat source. The heat conduction unit includes a connecting piece connected to the main body, and a plurality of fin pieces extending from the connecting piece spaced apart and perpendicular to the ground. Every two adjacent fin pieces define a longitudinally through heat conduction aisle. With the fins that are perpendicular to the ground, the upward airflow that is vertically upward due to the chimney effect will pass through the heat conduction passages longitudinally without being blocked and take away the heat energy, achieving an effective heat dissipation effect.

Description

Heat sink

The invention relates to an accessory, in particular to a heat sink.

Heat energy is always produced with the operation of the load product. If it is not handled properly, the accumulation of heat energy will affect the performance and life of the load product. The existing heat sink 9 is suitable for being installed on the aforementioned load product 8. The heat sink 9 includes a substrate 91 connected to the top surface of the load product 8, and a plurality of substrates 91 are parallel and spaced apart and extend upward.的radiating fins 92. The heat energy generated by the load product 8 will be conducted upward through the substrate 91 to the heat dissipation fins 92 to be dissipated into the air. If there is air flow in the environment, the heat dissipation efficiency can be further increased.

The existing heat dissipation device 9 can indeed achieve the heat dissipation effect by increasing the heat dissipation surface area by the heat dissipation fins 92, but if the load product 8 is installed indoors, less natural wind will reduce the air blowing and take away the heat energy. Efficiency; on the other hand, if the load product 8 is installed in a relatively high place indoors, the chimney effect of vertical air convection is likely to occur in the room, so that the air flowing from bottom to top will be first shielded by the substrate 91, and completely If the heat dissipation fins 92 cannot be blown, the heat dissipation efficiency will be greatly reduced.

Therefore, the object of the present invention is to provide a heat dissipation device that uses vertical convection to dissipate heat.

Therefore, the heat dissipation device of the present invention is suitable for deriving the heat energy of a heat source, and includes a carrying unit suitable for installing the heat source, and a heat conducting unit connected to the carrying unit.

The bearing unit includes a body suitable for setting the heat source.

The heat conduction unit includes a connecting piece connected to the main body, and a plurality of fin pieces extending from the connecting piece spaced apart from each other and perpendicular to the ground. Every two adjacent fin pieces define a longitudinally through Heat conduction channel.

The effect of the present invention is that through the heat conduction channels separated by the fins perpendicular to the ground, the air flowing vertically upwards due to the chimney effect will smoothly pass through the heat conduction channels, and then take away the relatively high places in the room. The heat energy of the heat source achieves the effect of improving heat dissipation efficiency.

H: heat source

1: bearing unit

11: body

111: bottom wall

112: Heat conduction part

113: side

2: Heat conduction unit

21: Connector

211: Transfer Department

211A: Area

211B: area

22: Fins

23: heat conduction channel

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: FIG. 1 is a perspective view illustrating an existing heat dissipation device; FIG. 2 is a perspective exploded view illustrating the heat dissipation device of the present invention One of the first embodiment; 3 is a schematic diagram illustrating the heat dissipation mechanism of the heat sink of the present invention; FIG. 4 is a perspective view illustrating a second embodiment of the heat sink of the present invention; FIG. 5 is a perspective view illustrating a third embodiment of the heat sink of the present invention Figure 6 is a perspective view illustrating a fourth embodiment of the heat sink of the present invention; Figure 7 is a perspective view illustrating a fifth embodiment of the heat sink of the present invention; and Figure 8 is a perspective view illustrating the heat sink of the present invention A sixth embodiment.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are represented by the same numbers.

Referring to FIGS. 2 and 3, a first embodiment of the heat sink of the present invention includes a carrying unit 1 suitable for installing the heat source H, and a heat conducting unit 2 connected to the carrying unit 1.

The carrying unit 1 includes a body 11 suitable for installing the heat source H. The body 11 has a polygonal bottom wall 111 and a heat conducting part 112 extending from the bottom wall 111 to the heat source H. The portion 112 is formed with a plurality of side surfaces 113 respectively extending from the side of the bottom wall portion 111 toward the heat source H. In the first embodiment, the main body 11 has a bottom wall 111 having a quadrangular shape, and a heat conducting part 112 extending from the bottom wall 111 to the heat source H, and the heat conducting part 112 is formed with four parts formed on the surface thereof. The four sides of the bottom wall 111 extend toward the side surface 113 of the heat source H.

The heat conducting unit 2 includes a connecting piece 21 connected to the main body 11 and a plurality of fin pieces 22 spaced apart from each other and extending outward from the connecting piece 21 and perpendicular to the ground. The connecting member 21 has a plurality of transfer portions 211 respectively covering the side surfaces 113, and one side of each transfer portion 211 protrudes from the corresponding side surface 113 along the spacing direction of the fins 22. In the first embodiment, the connecting member 21 has four transfer portions 211 respectively covering the side surfaces 113; and every two adjacent fin members 22 define a longitudinally through heat conduction channel 23 at intervals.

Specifically, in manufacturing and assembling, the fins 22 and the transfer parts 211 can be manufactured integrally and divided into four groups, and then the transfer parts 211 are respectively covered on the side surfaces. 113, the assembly of the first embodiment can be completed. It should be noted that the material of the carrying unit 1 and the heat conducting unit 2 should be selected from one or a combination of copper and aluminum metals with good thermal conductivity, corrosion resistance, and high strength.

Referring to FIG. 3, the mechanism for deriving the thermal energy of the heat source H in the first embodiment will be described below in detail. The thermal energy generated by the heat source H will pass through the heat conducting portion 112 along the transfer portions 211 (because the viewing angle is shielded and not Illustrated) is conducted to the fins 22. At the same time, the airflow that rises vertically due to the chimney effect will pass through the heat conduction channels 23 longitudinally, exchange heat with the fins 22, and continue to flow vertically to achieve utilization The chimney effect has the effect of taking away heat energy longitudinally.

Referring to FIG. 4, a second embodiment of the heat sink of the present invention differs from the first embodiment in the shape of the body 11, the transfer portions 211 and the corresponding ones The number of fins 22. In the second embodiment, the body 11 has a triangular bottom wall 111 (not shown because the viewing angle is blocked), and a bottom wall 111 facing the heat source H An extended heat conduction portion 112, wherein the heat conduction portion 112 is formed with three sides 113 extending from three sides of the bottom wall portion 111 to the heat source H; and the connecting member 21 has three sides 113 respectively covering the sides 113移部211.

Referring to FIG. 5, a third embodiment of the heat sink of the present invention. Similarly, the difference between the third embodiment and the first embodiment and the second embodiment lies in the shape of the main body 11 and the transfer portions 211 And the corresponding number of the fin pieces 22. In the third embodiment, the main body 11 has a pentagonal bottom wall 111, and a heat conducting part 112 extending from the bottom wall 111 to the heat source H, wherein the heat conducting part 112 is formed with five The side surfaces 113 respectively extending from the five sides of the bottom wall portion 111 to the heat source H; and the connecting member 21 has five transfer portions 211 respectively covering the side surfaces 113. From the difference in the arrangement of the first embodiment to the third embodiment, it can be seen that by changing the number of groups of the transfer parts 211 and the fins 22, it can correspond to the type of heat source, the appearance of the finished product, the heat dissipation efficiency, and the application environment. , Or cost control and other requirements for setting.

Referring to FIG. 6, a fourth embodiment of the heat dissipation device of the present invention takes into account that the heat energy will be reduced by air flow during the process from the inside to the outside, that is to say, the transfer parts 211 and the transfer parts 211 away from the body 11 and the The area 211A of the equal fins 22 has less hysteresis heat energy than the transfer parts 211 and the areas 211B of the fins 22 adjacent to the body 11, and the heat energy that needs to be taken away is less Low, so essentially Less surface area for heat dissipation. For space and cost considerations, the transfer portions 211 of the fourth embodiment are tapered and extend outward, and the longitudinal lengths of the fins 22 are also tapered corresponding to the transfer portions 211 respectively. Specifically, in the second embodiment, the cross section of each transfer portion 211 is a triangle, and the longitudinal lengths of the fins 22 are tapered corresponding to the transfer portions 211 respectively. In accordance with the aforementioned principle of decreasing thermal energy, the fourth embodiment can improve the efficiency of space utilization while maintaining the longitudinal conduction, and can reduce the material used for the fins 22 and reduce the cost.

Continue to refer to FIG. 6 and cooperate with FIG. 1. At the same time, in order to prove that the heat dissipation device of the present invention is indeed effective compared to the existing heat dissipation device 9, the existing heat dissipation device 9 will be installed in a power 100 watts below. The fourth embodiment is set in a heat source with a higher calorific value and a power of 125 watts. The heat sources are started to be driven in an environment with an ambient temperature of 33°C. After driving for a test time, By measuring its final temperature, the table below can be obtained:

It can be seen from the above that at the same time, the fourth embodiment can control the final temperature at the same 80.5°C as that of the existing heat sink within the same test time even if it carries a heat source with a higher calorific value. The fourth embodiment does have relatively good heat dissipation. In conjunction with the aforementioned reduction of the transfer parts 211 and the fins The volume setting concept of 22 shows that the fourth embodiment can reduce the materials used in manufacturing by changing the structure, and can also carry and export heat sources with higher calorific value.

Referring to FIG. 7, a fifth embodiment of the heat sink of the present invention. Compared with the previous embodiments, the body 11 of the fifth embodiment has a bottom wall 111 that is quadrilateral (the viewing angle is hidden and not Illustrated), and a heat conducting portion 112 extending from the bottom wall portion 111 to the heat source H, wherein the heat conducting portion 112 is formed with four side surfaces 113 extending from the four sides of the bottom wall portion 111 to the heat source H; and The connecting member 21 has two transfer portions 211 respectively covering the side surfaces 113 on two opposite sides thereof in parallel. The heat generated by the heat source H will be transmitted to the fins 22 through the heat conducting portion 112, along the side surfaces 113 and the transfer portions 211, and will be exchanged through the heat generated by the vertically upwardly flowing airflow. The effect of dissipating heat.

Referring to FIG. 8, a sixth embodiment of a heat sink of the present invention. The difference between the sixth embodiment and the fifth embodiment is that the carrying unit 1 includes at least one body 11 suitable for setting at least one heat source H, each At least one of the main bodies 11 has a quadrangular bottom wall 111 and a heat conducting part 112 extending from the bottom wall 111 to the heat source H. The heat conducting part 112 is formed with four sides extending from the bottom wall 111 respectively. Corresponding to the side surface 113 on which the heat source H extends; and the connecting member 21 has two parallel and spaced transfer portions 211 connecting the bodies 11 respectively. With the above-mentioned settings, the user can adjust the number of the main body 11 according to requirements to correspond to the required number of heat sources H to achieve the effect of simultaneously deriving and dissipating the heat energy of multiple heat sources H.

In summary, the heat sink of the present invention, through the transfer parts 211 and the vertically arranged fins 22, can draw out the thermal energy of the heat source H, and the vertical updraft affected by the chimney effect can be used to longitudinally Take it away, and can change the number and shape of the bottom wall portion 111 and the transfer portions 211, so as to improve the applicability and more efficiently manufacture and dissipate heat, so it can indeed achieve the purpose of the invention.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited by this, all simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the content of the patent specification still belong to This invention patent covers the scope.

H: heat source

1: bearing unit

11: body

111: bottom wall

112: Heat conduction part

113: side

2: Heat conduction unit

21: Connector

211: Transfer Department

22: Fins

23: heat conduction channel

Claims (5)

A heat dissipating device is suitable for deriving the heat energy of a heat source, and includes: a bearing unit, including a body suitable for setting the heat source, the body having a polygonal bottom wall, and a bottom wall from the bottom wall to the A heat-conducting part extending from the heat source, the heat-conducting part being formed with a plurality of side faces extending from the side of the bottom wall part to the heat source; and a heat-conducting unit including a connecting piece connected to the main body and a plurality of connecting pieces The fin pieces are spaced apart and extend outward and perpendicular to the ground, each two adjacent fin pieces define a longitudinally through heat conduction channel at intervals, and the connecting piece has a plurality of transfer parts respectively covering the side surfaces , One side of each transfer portion protrudes from the corresponding side surface along the spacing direction of the fins. The heat dissipation device according to claim 1, wherein the main body has a triangular bottom wall and a heat conducting part extending from the bottom wall to the heat source, wherein the heat conducting part is formed with three parts formed by the bottom wall. The three sides of the part extend to the side surfaces of the heat source; and the connecting piece has three transfer parts respectively covering the side surfaces. The heat dissipation device according to claim 1, wherein the body has a bottom wall portion in a quadrilateral shape, and a heat conduction portion extending from the bottom wall portion to the heat source, wherein the heat conduction portion is formed with four bottom walls, respectively The four sides of the wall portion extend to the side surfaces of the heat source; and the connecting member has four transfer portions respectively covering the side surfaces. The heat dissipation device according to claim 1, wherein the body has a bottom wall portion in a pentagonal shape, and a heat conduction portion extending from the bottom wall portion to the heat source, and Wherein, the heat conducting portion is formed with five side surfaces extending from the five sides of the bottom wall portion to the heat source; and the connecting piece has five transfer portions respectively covering the side surfaces. The heat dissipation device according to any one of claims 2 to 4, wherein the shifting parts extend outwardly from the side surfaces, and the longitudinal lengths of the fins correspond to the shifting parts. Department is shrinking.

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