A turbulent heat dissipation rib and a heat sink

Abstract

The utility model relates to a heat sink, and the technical scheme of the heat sink comprises a plurality of heat radiating cells which are stacked along X axis, Y axis and Z axis to form a three-dimensional array, the X axis, Y axis and Z axis are perpendicular to each other, and the plurality of heat radiating cells are integrally formed, the heat radiating cell comprises at least three wing plates extending along the X axis, the plurality of wing plates are integrally connected at one end, any two adjacent wing plates enclose a C-shaped opening, the C-shaped openings of any two adjacent heat radiating cells on the Y axis and Z axis form an air duct, and the air duct extends along the X axis, the wing plate is further provided with a first turbulence port, and the first turbulence port communicates the two adjacent air ducts sharing one wing plate.

Description

Technical Field

[0001] This utility model relates to the field of radiator technology, and in particular to a turbulence-dissipating rib and a radiator. Background Technology

[0002] In existing air-cooled heat sink designs, designers typically employ straight-tooth, needle-shaped, or corrugated fins to improve heat dissipation efficiency. These fins conduct heat from the base, which is then dissipated through thermal radiation and convection. According to basic heat transfer theory, the heat flow rate transferred by conduction is proportional to the cross-sectional area perpendicular to the heat flow direction, while the heat flow rate transferred by convection and radiation is proportional to the corresponding surface area. However, straight-tooth structures create a limited airflow pattern, leading to stable laminar flow across the fin surface and the accumulation of a thermal boundary layer. This causes heated air to stagnate, hindering the contact between fresh, cool air and the fins. Needle-shaped structures cannot provide a larger surface area, thus limiting heat dissipation efficiency. Corrugated plates can provide a larger surface area within the same dimensions, but their wall thickness is typically thin (approximately 0.15-0.3 mm) due to manufacturing limitations, resulting in a small cross-sectional area and insufficient thermal conductivity. This makes it difficult to efficiently conduct heat from the base to the ends of the fins, affecting overall heat dissipation performance and making them unsuitable for high-power, high-density applications. Utility Model Content

[0003] To address the problems in existing technologies, such as thermal boundary layer accumulation in straight toothed heat dissipation ribs, weak heat convection and radiation due to small surface area of ​​needle-shaped heat dissipation ribs, and insufficient heat conduction due to thin corrugated plates, this utility model provides a turbulence-induced heat dissipation rib and a heat sink.

[0004] This utility model provides the following technical solution: a turbulence heat dissipation rib, comprising multiple heat dissipation cells stacked sequentially along the X-axis, Y-axis and Z-axis to form a three-dimensional array, wherein the X-axis, Y-axis and Z-axis are perpendicular to each other, and the multiple heat dissipation cells are integrally formed; The heat dissipation cell includes at least three wing plates extending along the X-axis. Multiple wing plates are connected as one unit. Any two adjacent wing plates form a C-shaped opening. The C-shaped openings of any two adjacent heat dissipation cells on the Y-axis and Z-axis form an air duct. The air duct extends along the X-axis. The wing plate is also provided with a first turbulence port, which connects two adjacent air ducts that share a single wing plate.

[0005] Preferably, the heat dissipation cell includes four wing plates, and the four wing plates form an X-shaped structure.

[0006] Preferably, the first turbulence port extends to the edge of the wing plate to form an opening, and the first turbulence port of any two adjacent heat dissipation cells on the Y-axis and Z-axis forms a turbulence hole.

[0007] Preferably, the heat dissipation cell has a concave second turbulence port at both ends on the X-axis, and the second turbulence ports of any two adjacent heat dissipation cells on the X-axis form a turbulence hole.

[0008] A heat sink includes a heat sink substrate and heat sink ribs disposed on the heat sink substrate, wherein the heat sink ribs are turbulence heat sink ribs.

[0009] The beneficial effects of this invention are as follows: multiple heat dissipation cells are stacked into a three-dimensional array to form multiple air ducts, increasing the number of air ducts and significantly increasing the contact area between the airflow and the multiple air ducts. Combined with a corrugated plate with a large surface area, this improves the heat convection and heat radiation capabilities. The diagonal turbulence holes and the first and second straight-through turbulence holes guide the airflow to generate local turbulence, disrupting the thermal boundary layer and making the contact between the airflow and the surface of the heat dissipation ribs more sufficient. The cross-sectional area perpendicular to the heat flow direction is increased, improving the heat conduction capability. All of the above factors combined effectively improve the heat dissipation efficiency. Attached Figure Description

[0010] Figure 1 A three-dimensional diagram of one embodiment of a heat dissipation rib.

[0011] Figure 2 A partial enlarged top view of one embodiment of the heat dissipation rib.

[0012] Figure 3 A front view of one embodiment of the heat dissipation rib.

[0013] Figure 4 A side view of one embodiment of the heat dissipation rib.

[0014] Figure 5 A three-dimensional diagram of one embodiment of a heat dissipation cell.

[0015] Figure 6 This is a front view of one embodiment of a heat dissipation cell.

[0016] Figure 7 This is a side view of one embodiment of a heat dissipation cell.

[0017] Figure 8 This is a top view of one embodiment of a heat dissipation cell.

[0018] Figure 9 This is a temperature distribution diagram for heat dissipation simulation of this utility model.

[0019] Figure 10 This is a simulation diagram of the temperature distribution of a straight-tooth heat sink in the existing technology.

[0020] Figure 11 This is a simulation temperature distribution diagram for the heat dissipation of existing corrugated plate heat sinks.

[0021] Reference numerals: 10-heat dissipation cell, 11-wing plate, 12-C-shaped opening, 13-first turbulence port, 14-second turbulence port, 20-air duct, 30-heat dissipation substrate. Detailed Implementation

[0022] The embodiments of this utility model will be described in more detail below with reference to the accompanying drawings and reference numerals, so that those skilled in the art can implement them after reading this specification. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0023] This utility model provides a turbulence-dissipating heat dissipation rib, comprising multiple heat dissipation cells 10 stacked in a three-dimensional array. Please refer to [reference needed]. Figure 1-4 In a three-dimensional coordinate system composed of mutually perpendicular X-axis, Y-axis and Z-axis, multiple heat dissipation cells 10 are stacked sequentially along the X-axis, Y-axis and Z-axis, and are integrally formed into a whole.

[0024] The heat dissipation cell 10 includes at least three wing plates 11 extending along the X-axis. Multiple wing plates 11 are connected as a single unit, and any two adjacent wing plates 11 form a C-shaped opening 12. This invention does not limit the number of wing plates; one embodiment is as follows: Figure 6 As shown, it has four wing plates 11, forming an X-shaped structure. Multiple heat dissipation cells 10 are stacked sequentially along the X, Y, and Z axes to form a three-dimensional array, as shown... Figure 3 As shown, any two adjacent heat dissipation cells 10 on the Y and Z axes form a C-shaped opening 12 to create an air duct 20. The air duct extends along the X-axis, and multiple air ducts 20 form an air duct array. When the airflow enters the turbulent heat dissipation rib parallel to the X-axis, the multiple air ducts 20 evenly divide the airflow into multiple streams. As the airflow passes through, it carries away the heat dissipated from the inner wall of each air duct 20. Compared with the use of straight toothed or needle-shaped heat dissipation ribs in the prior art, the number of air ducts 20 is greatly increased within the same airflow cross-sectional area, and the contact area between the airflow and multiple air ducts 20 is significantly increased, thereby improving the heat dissipation efficiency.

[0025] Meanwhile, this invention is compared with existing straight-tooth heat dissipation ribs, needle-shaped heat dissipation ribs, and corrugated plate heat dissipation ribs of the same specifications. A section of equal area is taken from each of the four ribs on a cross-section perpendicular to the heat flow direction, and the cross-sectional area of ​​each rib within this section is calculated. Please refer to... Figure 3 The heat source is located below the heat dissipation ribs, and the heat flow direction is consistent with the positive Z-axis. Due to the influence of processing technology and convective heat transfer, the density of straight-toothed heat dissipation ribs and needle-shaped heat dissipation ribs is low, the thickness of straight-toothed heat dissipation ribs is thin, and the diameter of needle-shaped heat dissipation ribs is small. However, in this utility model, multiple wing plates are all obliquely arranged, and the cross-sectional area of ​​the heat dissipation cell 10 in this area is larger than the cross-sectional area of ​​the straight-toothed, needle-shaped heat dissipation ribs and corrugated plates in this area, thereby improving the heat conduction capacity of the heat dissipation cell 10.

[0026] The wing plate 11 is also provided with a first airflow inlet 13. The first airflow inlet 13 connects two adjacent air ducts 20 that share a single wing plate 11; in such cases... Figure 5 , 7 In one embodiment shown in Figure 8, the first turbulence port 13 extends to the edge of the wing plate 11 to form an opening, and the first turbulence port 13 of any two adjacent heat dissipation cells on the X-axis forms a larger turbulence hole; in another embodiment, the first turbulence port 13 may be a complete hole.

[0027] When airflow passes through the duct 20, a certain turbulence zone is generated at the first turbulence inlet 13. This turbulence can effectively disrupt the temperature boundary layer of the heat dissipation ribs, improving the overall heat transfer capacity. When multiple heat dissipation cells 10 are stacked sequentially along the X, Y, and Z axes to form a three-dimensional array, the multiple first turbulence inlets are arranged in a straight line along the Y and Z axes, as shown below. Figure 2 , 3 As shown, this can greatly reduce airflow resistance and improve heat dissipation efficiency.

[0028] Further, please refer to Figure 5 , 7 8. The heat dissipation cell 10 has concave second turbulence ports 14 at both ends on the X-axis. When multiple heat dissipation cells 10 are stacked sequentially along the X-axis, Y-axis, and Z-axis to form a three-dimensional array, the second turbulence ports 14 of any two adjacent heat dissipation cells 10 on the X-axis form larger turbulence holes, and the turbulence holes are arranged in a straight line on the Y-axis and Z-axis, such as... Figure 2 , 3 As shown. The second spoiler 14 has the same function as the first spoiler 13 and works in conjunction with the first spoiler.

[0029] This utility model also provides a heat sink, such as Figure 1 As shown, the heat sink includes a heat sink substrate 30 and heat sink ribs disposed on the heat sink substrate 30, wherein the heat sink ribs are the aforementioned turbulence heat sink ribs.

[0030] Temperature simulations were conducted using the heat sink provided by this invention, as well as heat sinks employing straight-tooth heat dissipation ribs and corrugated plate heat dissipation ribs, to compare and verify the heat dissipation effect of this invention. The overall dimensions of the heat dissipation ribs in all three are the same, 80*50*25mm. The wall thickness and length of each fin of the heat dissipation cell, as well as the wall thickness and spacing of each heat dissipation fin in the straight-tooth and corrugated plate heat dissipation ribs, were adjusted multiple times. After multiple simulations, the example with the best heat dissipation effect was selected for comparison. The optimal simulation results are as follows: Figure 9 , 10 As shown in Figure 11.

[0031] Different colors represent different temperatures. The simulated highest temperature of the straight-tooth heat dissipation fins is 85.89℃, the lowest temperature is 30.36℃, and the maximum temperature difference is 55.53℃. The simulated highest temperature of the corrugated plate heat dissipation fins is 76.95℃, the lowest temperature is 32.12℃, and the maximum temperature difference is 44.83℃. The simulated highest temperature of the turbulence-driven heat dissipation fins used in this invention is reduced to 65.96℃, the lowest temperature is 25.86℃, and the maximum temperature difference is reduced to 40.1℃. Compared with the heat sink using straight-tooth heat dissipation fins, the heat dissipation effect of this invention is improved by 23.2%, and the temperature uniformity is improved by 27.78%. Compared with the heat sink using corrugated plate heat dissipation fins, the heat dissipation effect of this invention is improved by 14.28%, and the temperature uniformity is improved by 10.55%. Therefore, this invention significantly improves heat dissipation efficiency.

[0032] The above describes one or more embodiments of this utility model in a relatively specific and detailed manner, but it should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A heat dissipation rib for turbulence, characterized in that, It includes multiple heat dissipation cells stacked sequentially along the X-axis, Y-axis and Z-axis to form a three-dimensional array, wherein the X-axis, Y-axis and Z-axis are perpendicular to each other, and the multiple heat dissipation cells are integrally formed; The heat dissipation cell includes at least three wing plates extending along the X-axis. Multiple wing plates are connected as one unit. Any two adjacent wing plates form a C-shaped opening. The C-shaped openings of any two adjacent heat dissipation cells on the Y-axis and Z-axis form an air duct. The air duct extends along the X-axis. The wing plate is also provided with a first turbulence port, which connects two adjacent air ducts that share a single wing plate.

2. The heat dissipation rib according to claim 1, characterized in that, The heat dissipation cell includes four wing plates, which form an X-shaped structure.

3. The heat dissipation rib according to claim 1, characterized in that, The first turbulence port extends to the edge of the wing plate to form an opening, and the first turbulence port of any two adjacent heat dissipation cells on the Y-axis and Z-axis forms a turbulence hole.

4. The heat dissipation rib according to claim 1, characterized in that, The heat dissipation cell has a concave second turbulence port at both ends on the X-axis, and the second turbulence ports of any two adjacent heat dissipation cells on the X-axis form a turbulence hole.

5. A heat sink, comprising a heat dissipation substrate and heat dissipation ribs disposed on the heat dissipation substrate, characterized in that, The heat dissipation rib is the turbulence heat dissipation rib as described in any one of claims 1 to 4.

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