Radiator with turbulent structure

Abstract

The present invention belongs to the field of heat dissipation technology, and specifically discloses a planar fin for a heat sink, comprising a turbulent structure extending from the side of the planar fin. Each turbulent structure defines a longitudinal axis and has a first edge parallel to the longitudinal axis and connected to the planar surface of the fin. Each turbulent structure also includes a second edge opposite to the first edge and in free space. The second edge defines an edge with a varying distance from the first edge along the length of the longitudinal axis. The edge of each second edge is further shaped to guide the turbulence of the fluid to flow through the second edge in the fluid at least at a predetermined flow rate.

Description

Technical Field

[0001] This specification is primarily concerned with providing cooling to electronic equipment. Background Art

[0002] Electronic devices generate heat by consuming power. Excessive heat generation without effective cooling can lead to damage and failure of electronic devices. Electronic devices can be cooled by cooling systems such as heat sinks. Heat sinks are passive heat exchangers that transfer heat from electronic devices to a fluid medium. Summary of the invention

[0003] Heat sinks can be used to cool electronic devices such as processors, memory, network devices, and other heat generating devices. In computing systems, heat sinks can be used to cool central processing units (CPUs), graphics processing units (GPUs), tensor processing units (TPUs), chipsets, and random access memory (RAM) modules, among other electronic devices.

[0004] A heat sink is a passive heat exchanger that transfers heat generated by an electronic device to a lower temperature fluid medium, such as air or liquid coolant. The fluid medium removes and dissipates heat from the electronic device. Heat sinks can be used to reduce or maintain the temperature of an electronic device, preventing it from overheating.

[0005] The amount of heat removed by a heat sink depends on various factors, including the surface area of ​​the heat sink, the volume and velocity of the fluid passing through the heat sink, and the direction of the fluid flowing through the heat sink. Heat sink performance can be improved by increasing the amount of heat that the heat sink removes from the electronic device. Heat dissipation performance can also be improved by increasing the rate at which heat is removed from the electronic device.

[0006] Generally, an innovative aspect of the subject matter described in this specification can be embodied as a heat sink, comprising: a base, the base defining a first side having a base planar surface and a second side opposite the first side, and a plurality of planar fins, the plurality of planar fins extending from the base planar surface in a mutually parallel manner, each of the plurality of planar fins comprising: a bottom fin edge, the bottom fin edge coupled to the base planar surface and extending parallel to a longitudinal axis of the planar fin; a top fin edge, the top fin edge opposite to the bottom fin edge and extending parallel to the longitudinal axis of the planar fin; a front fin edge, the front fin edge extending from the bottom fin edge to the top fin edge; a rear fin edge, the rear fin edge opposite to the front fin edge and extending from the bottom a fin body extending from a bottom fin edge to a top fin edge; a fin body extending from a bottom fin edge to a top fin edge and having a first side defining a first planar surface and a second side opposite the first side defining a second planar surface; and a first group of turbulence structures extending from the first planar surface, each turbulence structure in the first group of turbulence structures defining a longitudinal axis and having a first edge parallel to the longitudinal axis and connected to the first planar surface and a second edge opposite the first edge and in free space, the second edge defining an edge along the length of the longitudinal axis, the edge having a distance variation from the first edge; and wherein the edge of each second edge is further shaped so as to induce turbulence in the fluid flowing through the second edge at at least a predetermined flow rate.

[0007] Another innovative aspect of the subject matter described in this specification can be embodied as a planar fin, the planar fin comprising a bottom fin edge coupled to a base planar surface and extending parallel to a longitudinal axis of the planar fin; a top fin edge opposite the bottom fin edge and extending parallel to the longitudinal axis of the planar fin; a front fin edge extending from the bottom fin edge to the top fin edge; a rear fin edge opposite the front fin edge and extending from the bottom fin edge to the upper fin edge; a fin body extending from the bottom fin edge to the top fin edge and having a defined A first side of a first planar surface and a second side opposite to the first side defining a second planar surface; a first group of turbulent structures extending from the first planar surface, each turbulent structure in the first group of turbulent structures defining a longitudinal axis and having a first edge parallel to the longitudinal axis and connected to the first planar surface and a second edge opposite to the first edge and in free space, the second edge defining an edge along the length of the longitudinal axis, the edge having a distance variation from the first edge; and wherein the edge of each second edge is further shaped so as to induce turbulence in the fluid flowing through the second edge at at least a predetermined flow rate.

[0008] Another innovative aspect of the subject matter described in this specification can be embodied in a heat sink, the heat sink comprising: a base, the base defining a first side having a base planar surface and a second side opposite the first side; and a plurality of planar fins extending from the base planar surface in a manner parallel to each other; each of the plurality of planar fins comprising: a bottom fin edge coupled to the base planar surface and extending parallel to a longitudinal axis of the planar fin; a top fin edge opposite the bottom fin edge and parallel to the longitudinal axis of the planar fin; The fin body comprises a fin body extending from the bottom fin edge to the top fin edge and a fin body having a first side defining a first plane and a second side defining a second plane opposite to the first side; and a device for inducing turbulence extending from a surface of the first plane, and the device causes turbulence in a fluid flowing through the device at a predetermined flow rate.

[0009] The details of one or more embodiments of the subject matter of this specification are set forth in the accompanying drawings and the following description. Other features, aspects and advantages of the subject matter will become apparent from the description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a diagram of an exemplary heat sink having planar fins including turbulent flow structures.

[0011] Figure 2 is a top view of a planar fin with a turbulent structure.

[0012] Figure 3 is a side view of the turbulent structure.

[0013] Figure 4 is a perspective view of a turbulent flow structure with terminal blocks.

[0014] Figure 5 is a side view of another turbulent structure.

[0015] Like reference numbers and numerals in the various drawings represent like elements. DETAILED DESCRIPTION

[0016] When the fluid flows at a predetermined rate, turbulence is generated between the fins, and at this time, the performance of the heat sink is improved. In order to induce turbulence, the planar fins of the heat sink include a group of turbulence structures. The turbulence structure extends from a first planar surface of the fin, such as a first side of the fin. Each turbulence structure in the first group of turbulence structures defines a longitudinal axis and has a first edge parallel to the longitudinal axis and connected to the first plane. Each turbulence structure also has a second edge opposite to the first edge and in free space. The second edge defines an edge along the length of the longitudinal axis, which has a distance variation from the first edge. For example, the edge can be serrated, straight, or even curved. The edge of each second edge is also shaped to guide the turbulence of the fluid to flow through the second edge in the fluid at least at a predetermined flow rate.

[0017] The turbulence structure can also be attached to the other side of the heat sink and offset from the structure on the first side of the heat sink. In this configuration, the turbulence structure extends into the space between the heat sink from both heat sink surfaces. With higher turbulence, the heat sink achieves a higher heat exchange coefficient h that would otherwise be achieved with smooth fins. This results in better convection cooling capabilities. Thus, the principle of this design is to add turbulence enhancement features to the heat sink to increase the heat exchange coefficient.

[0018] These and additional features are described in more detail below.

[0019] Figure 1 1 is a diagram of an exemplary heat sink 100 having planar fins 110 including turbulent structures 132. The heat sink 100 includes a base 102 defining a first side 104 having a base planar surface, and a second side 106 opposite the first side 104. A set of planar fins 110 (e.g., 110-1 ... N) extend from the base planar surface in a mutually parallel manner. Each planar fin 110 includes a bottom fin edge 112 that is coupled to the base planar surface and extends parallel to a longitudinal axis 111 of the planar fin 110. Each planar fin 110 is also defined by a top fin edge 114, which is opposite to the bottom fin edge 112 and extends parallel to the longitudinal axis 111 of the planar fin, and is further defined by a front fin edge 116 and a rear fin edge 118, wherein the front fin edge 116 extends from the bottom fin edge 112 to the top fin edge 114, and the rear fin edge 118 is opposite to the top fin edge 114 and extends from the bottom fin edge 112 to the top fin edge 114.

[0020] Figure 21 is a top view of a planar fin 110 having a turbulent structure 132. Each planar fin 110 includes a fin body 120 extending from a bottom fin edge 112 to a top fin edge 114, and having a first side 122 defining a first plane surface and a second side 124 opposite the first side defining a second plane. To avoid overcrowding the drawings, similar elements for the planar fins 110 are not all labeled.

[0021] In some embodiments, each planar fin 110, except for the outer planar fins 110-1 and 110-N, includes a first set of turbulence structures 132-1 extending from the first planar surface 122, and a second set of turbulence structures 132-2 extending from the second planar surface 124. However, the outer planar fin 110-1 includes only the first set of turbulence structures 132-1 on the first planar surface 122. In contrast, the outer planar fin 110-N includes only the second set of turbulence structures 132-2 on the second planar surface 124. In other embodiments, the outer planar fins 110-1 and 110-N have turbulence structures 132 on both their respective first planar surfaces 122 and second planar surfaces 124.

[0022] The turbulent structures 132 are evenly spaced, and each respective set 132 - 1 and 132 - 2 is offset from one another so as not to unduly reduce airflow that would result if the sets 132 - 1 and 132 - 2 were not offset.

[0023] Figure 3 1 is a side perspective view of turbulence structures 132. Each turbulence structure 132 defines a longitudinal axis 140 and has a first edge 142 that is parallel to the longitudinal axis 140. The first edge 142 is connected to the planar surface 122 or 124. In some embodiments, the turbulence structure 132 is connected to the planar surface 122 or 124 at an acute angle A, such as Figure 2 As shown. The turbulent structure 132 includes a second edge 144 opposite to the first edge 142. Figure 2 As shown, the second edge is in free space so that air can flow over the second edge 144. The second edge 144 defines an edge 145 (the edge 145 of the second edge is Figure 3 The edge 145 is shown in phantom and offset in the figure, and the edge 145 is at a different distance from the first edge 142 along the length of the longitudinal axis 140. The edge 145 of each second edge 144 is further shaped to guide the turbulence of the fluid flowing through the second edge 144 at least at a predetermined flow rate (e.g., at a flow rate caused by the fan 101). Figure 3As shown, the edge 145 has a linear variation from a maximum distance H to a minimum distance h from the first edge 142, and a relative maximum and minimum spacing distance d. The values ​​of A, H, h and d can be changed to obtain different heat transfer coefficients. For example, such heat transfer coefficients can be measured empirically.

[0024] Figure 3 The triangular shape of is just one example of an edge that can be used. Figure 5 As shown, a turbulence structure 202 may be used having a curved edge pattern 204. Other edge patterns may also be used, such as a sawtooth pattern, a straight tooth pattern, or other patterns.

[0025] In some embodiments, the second edge 144 has a uniform cross-section. However, in other embodiments, each second edge 144 may include a terminal block 146 to further increase turbulence. Figure 4 As shown, terminal block 146 is pyramidal in shape; however, various other shapes may be used.

[0026] Although this specification contains many specific implementation details, these should not be interpreted as limitations on the scope of the claimed protection, but should be interpreted as descriptions of features peculiar to a particular embodiment. Certain features described in the context of a separate embodiment in this specification may also be implemented in combination in a single embodiment. On the contrary, the various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple embodiments. In addition, although the features may be described above as working in certain combinations, and even initially claimed as such, in some cases, one or more features in the claimed combination may be removed from the combination, and the claimed combination may be directed to a sub-combination or a variation of the sub-combination.

[0027] Similarly, although operations are described in a particular order in the accompanying drawings, this should not be understood as requiring that the operations be performed in the particular order shown or in a sequential order, or that all of the operations shown be performed to obtain the desired results. In some cases, multitasking and parallel processing may be advantageous. In addition, the separation of various system modules and components in the above-described embodiments should not be understood as requiring such separation in all embodiments, and it should be understood that the described program components and systems can generally be integrated into a single software product or packaged into multiple software products.

[0028] Specific embodiments of the subject matter have been described. Other embodiments are within the scope of the following claims. For example, the actions recited in the claims can be performed in a different order and still achieve the desired results. As an example, the processes shown in the accompanying drawings do not necessarily require the particular order or sequence shown to achieve the desired results. In some cases, multitasking and parallel processing may be advantageous.

Claims

1. A radiator, characterized in that: include: a base defining a first side having a base planar surface and a second side opposite the first side; as well as A plurality of planar fins extending from the base planar surface in a mutually parallel manner, each of the plurality of planar fins comprising: a bottom fin edge coupled to the base planar surface and extending parallel to a longitudinal axis of the planar fin; a top fin edge, the top fin edge being opposite the bottom fin edge and extending parallel to the longitudinal axis of the planar fin; a front fin edge, the front fin edge extending from the bottom fin edge to the top fin edge; a rear fin edge, the rear fin edge being opposite to the front fin edge and extending from the bottom fin edge to the top fin edge; a fin body extending from the bottom fin edge to the top fin edge and having a first side defining a first planar surface and a second side opposite the first side defining a second planar surface; and a first set of turbulence structures extending from the first planar surface, each turbulence structure in the first set of turbulence structures defining a longitudinal axis and having a first edge parallel to the longitudinal axis and connected to the first planar surface and a second edge opposite the first edge and in free space, the second edge defining an edge having a distance from the first edge that varies along the length of the longitudinal axis; and Wherein the edge of each second edge is further shaped so as to induce turbulence in the fluid flowing past the second edge at at least a predetermined flow rate.

2. The heat sink according to claim 1, characterized in that Each planar fin also includes a second set of turbulence structures extending from the second planar surface, each turbulence structure in the second set of turbulence structures defining a longitudinal axis and having a third edge parallel to the longitudinal axis and connected to the second planar surface and a fourth edge parallel to the longitudinal axis and opposite to the third edge and in free space, the fourth edge defining an edge, the distance between the edge and the third edge varying along the length of the longitudinal axis, and wherein the edge of each fourth edge is further shaped so as to induce turbulence in the fluid flowing through the fourth edge at at least a predetermined flow rate.

3. The heat sink according to claim 2, characterized in that For each planar fin, the first set of turbulence structures are connected to the planar fin at a corresponding first position along the longitudinal axis of the planar fin, and the second set of turbulence structures are attached to the planar fin at a corresponding second position along the longitudinal axis of the planar fin, and wherein the corresponding first position is offset from the corresponding second position along the longitudinal axis of the planar fin.

4. The heat sink according to claim 3, characterized in that The edges of the second edge of the first set of turbulence structures and the fourth edge of the second set of turbulence structures define a sawtooth pattern.

5. The heat sink according to claim 3, characterized in that The edges of the second edge of the first set of turbulence structures and the fourth edge of the second set of turbulence structures define a spur pattern.

6. The heat sink according to claim 3, characterized in that: The edges of the second edge of the first set of turbulence structures and the fourth edge of the second set of turbulence structures define a curved pattern.

7. The heat sink according to claim 3, characterized in that Each planar fin is attached to the planar surface at an acute angle relative to the planar surface.

8. The heat sink according to claim 7, characterized in that The acute angle is measured relative to the rear fin edge.

9. The heat sink according to claim 2, characterized in that: The edges of the second edge of the first set of turbulence structures and the fourth edge of the second set of turbulence structures define a sawtooth pattern.

10. The heat sink according to claim 2, characterized in that The edges of the second edge of the first set of turbulence structures and the fourth edge of the second set of turbulence structures define a spur pattern.

11. The heat sink according to claim 2, characterized in that The edges of the second edge of the first set of turbulence structures and the fourth edge of the second set of turbulence structures define a curved pattern.

12. The heat sink according to claim 1, characterized in that Each planar fin is attached to the planar surface at an acute angle relative to the planar surface.

13. The heat sink according to claim 12, characterized in that The acute angle is measured relative to the rear fin edge.

14. A planar fin, characterized in that: include: a bottom fin edge coupled to the base planar surface and extending parallel to a longitudinal axis of the planar fin; a top fin edge, the top fin edge being opposite the bottom fin edge and extending parallel to the longitudinal axis of the planar fin; a front fin edge, the front fin edge extending from the bottom fin edge to the top fin edge; a rear fin edge, the rear fin edge being opposite to the front fin edge and extending from the bottom fin edge to the top fin edge; a fin body extending from the bottom fin edge to the top fin edge and having a first side defining a first planar surface and a second side opposite the first side defining a second planar surface; as well as a first set of turbulence structures extending from the first planar surface, each turbulence structure in the first set of turbulence structures defining a longitudinal axis and having a first edge parallel to the longitudinal axis and connected to the first planar surface and a second edge opposite the first edge and in free space, the second edge defining an edge having a distance from the first edge that varies along the length of the longitudinal axis; as well as Wherein the edge of each second edge is further shaped so as to induce turbulence in the fluid flowing past the second edge at at least a predetermined flow rate.

15. The planar fin according to claim 14, characterized in that: It also includes a second group of turbulence structures extending from the second planar surface, each turbulence structure in the second group of turbulence structures defines a longitudinal axis and has a third edge parallel to the longitudinal axis and connected to the second planar surface and a fourth edge parallel to the longitudinal axis and opposite to the third edge and in free space, the fourth edge defining an edge, the distance between the edge and the third edge varying along the length of the longitudinal axis, wherein the edge of each fourth edge is further shaped so as to induce turbulence in the fluid flowing through the fourth edge at at least a predetermined flow rate.

16. The planar fin according to claim 15, characterized in that: The first set of turbulence structures are connected to the planar fin at respective first positions along the longitudinal axis of the planar fin, and the second set of turbulence structures are attached to the planar fin at respective second positions along the longitudinal axis of the planar fin, and wherein the respective first positions are offset from the respective second positions along the longitudinal axis of the planar fin.

17. The planar fin according to claim 16, characterized in that: The edges of the second edge of the first set of turbulence structures and the fourth edge of the second set of turbulence structures define a sawtooth pattern.

18. The planar fin according to claim 16, characterized in that: The edges of the second edge of the first set of turbulence structures and the fourth edge of the second set of turbulence structures define a spur pattern.

19. The planar fin according to claim 16, characterized in that: The edges of the second edge of the first set of turbulence structures and the fourth edge of the second set of turbulence structures define a curved pattern.

20. A radiator, characterized in that: include: a base defining a first side having a base planar surface and a second side opposite the first side; as well as A plurality of planar fins extending from the base planar surface in a mutually parallel manner, each of the plurality of planar fins comprising: a bottom fin edge coupled to the base planar surface and extending parallel to a longitudinal axis of the planar fin; a top fin edge, the top fin edge being opposite the bottom fin edge and extending parallel to the longitudinal axis of the planar fin; a front fin edge, the front fin edge extending from the bottom fin edge to the top fin edge; a rear fin edge, the rear fin edge being opposite to the front fin edge and extending from the bottom fin edge to the top fin edge; a fin body extending from the bottom fin edge to the top fin edge and having a first side defining a first planar surface and a second side opposite the first side defining a second planar surface; and Means for inducing turbulent flow extend from the first planar surface and cause fluid flowing through the means to generate turbulent flow at a predetermined flow rate.

Images