JP3135819U - Heat dissipation structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat radiating structure capable of improving heat conduction efficiency.
SOLUTION: A main body having at least one surface and a heat conduction strengthening part provided on the surface, the heat conduction strengthening part being spaced apart from the surface and protruding slightly higher than the surface. At least one convex portion provided on the surface, and a plurality of scale-like portions provided so as to be recessed from the surface, except for a position where the convex portion is provided on the surface. Are formed so as to have an end edge portion and a pointed end portion, and the pointed end portion is in contact with the end edge portion of the adjacent scale-like portion.
[Selection] Figure 1

Description

  The present invention relates to a heat dissipation structure that enhances heat conduction efficiency.

  As electronic elements become more precise, more heat is generated from the electronic elements. For this reason, it is not sufficient to dissipate heat naturally or forcefully to the surrounding environment. For this reason, the heat dissipation effect of the electronic device itself has to be enhanced. Most of the existing methods are methods in which a heat radiating means is provided at a heat generation source to guide and release the heat. In other words, this is a system in which heat is naturally or forcibly released to the surrounding environment by using the fins of the heat dissipation means.

  However, the heat dissipation means having an existing fan has some problems that cannot be solved. For example, the temperature difference between the airflow flowing through the fin surface and the heat dissipating means is only 5 to 10 degrees Celsius, and there is a problem that the temperature stage is insufficient. There is also a problem that heat dissipation is prevented by the material and structure of the heat dissipation means itself. These problems make it difficult for existing heat dissipation means to further increase the heat dissipation efficiency. For this reason, it can be said that it is insufficient to solve the heat dissipation problem of an electronic element having a high calorific value.

  As a technique for improving the above-mentioned problems, there is a technique disclosed in Taiwan Utility Model Public Notice No. 90220898. The technology disclosed in the publication provides a heat exchange fin that generates a vortex phenomenon, and a plurality of concave portions and convex portions are formed and distributed on the surface of the fin. Or combine two or more. In this case, it is provided so that the respective convex portions abut on the opposing surfaces of two adjacent fins. For this reason, a plurality of fins are connected to provide a heat exchange function. When heat exchange is performed, the airflow that carries heat flows through a passage formed in a space that does not include an obstruction formed by the convex and concave portions of both fins. Further, when the air current collides with an obstructing portion formed by the contact of the convex portion and the concave portion, the flowing angle changes, and the original flowing direction and speed change. For this reason, the phenomenon in which the airflow carrying heat is disturbed occurs, and the thermal convection effect between the airflow and each fin can be enhanced.

  However, the above-described structure has a problem in actual use. That is, since there are a plurality of blocking portions in the airflow path between the fins, the flow space of the airflow that can be originally provided is reduced, and a considerable amount of back pressure is generated when convection flows. Therefore, the amount of fluid inflow is reduced.

  In addition, since the airflow flows around the plurality of inhibition portions, not only drag due to friction is generated on the fin surface, but also two-dimensional fluid friction drag exists due to the drag due to fluid friction with the inhibition portion surface. Generate a slowdown.

  In addition, the thickness of the boundary layer also reduces the heat transfer effect as the flow distance increases. For this reason, it becomes impossible to discharge | release heat efficiently, and it becomes impossible to meet a user's demand.

  This invention makes it a subject to provide the thermal radiation structure which can improve heat conduction efficiency.

Therefore, as a result of intensive research in light of the drawbacks found in the prior art,
A main body having at least one surface and a heat conduction strengthening portion provided on the surface, and the heat conduction strengthening portion is provided with a gap on the surface and protruding slightly higher than the surface. It includes at least one or more convex portions and a plurality of scale-like portions provided so as to be recessed from the surface at locations other than the position where the convex portions are provided on the surface, and the scale-like portions form an angle of attack on the surface. At the same time, focusing on the knowledge that the problem can be solved by the structure of the heat dissipating structure that is formed so as to be in contact with the edge part of the adjacent scale-like part, including the edge part and the pointed part. Based on this, the present invention was completed.

This device will be specifically described below.
The heat dissipating structure according to claim 1 is a heat dissipating structure comprising a main body having at least one surface and a heat conduction strengthening portion provided on the surface,
The surface of the heat conduction strengthening portion is excluded from at least one convex portion provided at a distance from the surface and protruding slightly higher than the surface, and a position on the surface where the convex portion is provided. A plurality of scaly portions provided so as to be recessed from,
The scaly part is inclined to form an angle of attack on the surface, is provided with an end edge part and a pointed end part, and the pointed end part is formed so as to be in contact with the end edge part of the adjacent scale-like part,
The convex portion and the scale-like portion are configured to generate a vortex and a secondary flow in the fluid approaching the surface, and to destroy the boundary layer that increases the thickness to increase the heat conduction efficiency.

  The heat dissipating structure according to claim 2 is provided so that the scale portions in claim 1 cross front and back, and each pointed portion corresponds to an end edge portion of the scale portion located in front of the scale portion. It is provided as follows.

  The heat dissipating structure according to claim 3 is arranged with the scale state in claim 1 dispersed.

  According to a fourth aspect of the present invention, the scale-like portion according to the first aspect is disposed on the surface of the main body so as to be inclined in a single direction.

  The heat dissipating structure according to claim 5 is arranged such that the scale-like portions in claim 1 are relatively inclined.

  In the heat dissipation structure according to claim 6, the convex portion in claim 1 includes at least one first convex portion, and the first convex portion extends from one side of the surface to the other side. Stretch.

  In the heat dissipation structure according to claim 7, the convex portion in claim 1 includes at least one first convex portion and second convex portion, and the first convex portion and the second convex portion are They extend from both sides of the surface toward the center line in the longitudinal direction of the surface and intersect to form a symmetrical shape.

  In the heat dissipation structure according to an eighth aspect, a depression angle is formed at a location where the first convex portion and the second convex portion in the first aspect intersect.

  In the heat dissipation structure according to claim 9, the scale-like portion in claim 1 is selected from a circular shape, a rhombus shape, and a triangular shape, or these are combined to be combined.

  In the heat dissipation structure described in claim 10, the surface of the scale-like portion in claim 1 is a flat surface.

  In the heat dissipating structure according to an eleventh aspect, the convex portion according to the first aspect is square.

  The heat dissipation structure according to a twelfth aspect has a semicircular convex portion according to the first aspect.

  The heat-dissipating structure according to this device can destroy the boundary layer and reduce the inhibition of heat conduction, and when the fluid flows along the periphery of the scale-like part, a rotating vortex is generated and mixed with the main field. A secondary flow is formed to increase the heat transfer efficiency, and thereby a preferable heat transfer effect is obtained.

  As disclosed in FIGS. 1 and 2, the heat dissipation structure according to the present invention includes a main body 10 including at least one surface and a heat conduction enhancing portion provided on the surface.

  The heat conduction strengthening portion includes at least one convex portion 11 and a plurality of scale portions 12. The main body 10 can have an appropriate thickness as required, and the shape is not limited to the illustrated shape, and may be any geometric shape. For example, it can be selected from square, rectangle, circle, diamond, and the like. In the embodiment, a rectangular case is taken as an example.

  Protrusions 11 are provided on the surface so as to be spaced apart and slightly higher than the surface. Preferably, it consists of the 1st convex part 111 and the 2nd convex part 112 so that it may illustrate. The first convex portion 111 and the second convex portion 112 intersect with each other by extending from both sides of the surface toward the center line in the longitudinal direction of the surface, and are formed symmetrically, and the depression angle θ Form. The depression angle θ is preferably not larger than 90 degrees, and the convex portion 11 is formed in a V shape and provided on the surface of the main body 10.

  The scaly portion 12 is provided at a location other than the position where the convex portion 11 is provided on the surface, and is provided so as to be recessed from the surface. Each scale portion 12 forms an angle of attack α on the surface, as shown in FIG. Moreover, it has the edge part 121 and the point part 122, and the point part 122 is formed so that the edge part 121 of the scale part 12 which adjoins may be contact | connected. The surface 123 of the scale portion 12 is a flat surface.

  In the embodiment, when the scaly portion 12 is arranged on the surface of the main body 10, the scaly portions 12 are provided so as to cross each other, and each of the pointed portions 122 faces the end edge portion 121 of the scaly portion 12 located in front of the scaly portion 12. To be provided. It is disposed on the surface of the main body 10 so as to be inclined relative to the installation of the convex portion 11 (for example, the V shape described above).

  In addition, the scaly portion 12 is preferably selected from a circle, a rhombus, and a triangle, or these are combined to be combined. The angle of attack α of the scaly portion 12 is set based on a comparison value between the scaly portion 12 and the fluid passage, a comparison value between the pitch and the height of the scaly portion 12, and a comparison value between the diameter and the pitch of the scaly portion 12.

  If it demonstrates collectively, the convex part 11 will exhibit a square according to drawing, but it is not restricted to this, For example, a semicircle may be sufficient. The form is only at least one or more 1st convex part 111, Comprising: You may form so that it may extend | stretch from one edge part of a main body to the other edge part. That is, the convex portion is inclined in a single direction and provided in parallel with the surface of the main body. In this case, the scale-like portion 12 is disposed on the surface of the main body so as to be inclined in a single direction in accordance with the convex portion 11. Furthermore, the scale-like part 12 is not limited to the above-described form, and may be arranged so as to be dispersed on the surface of the main body.

  As disclosed in FIGS. 3 and 4, when the fluid flows (fluid flowing relative to the depression direction as shown) and passes through the surface of the main body 10, the fluid is a point projection portion of each scale-like portion 12. Pass through. The fluid approaching the surface of the main body 10 flows under the restriction of the inclination of the end edge portion 121 of each scale-like portion 12. Therefore, after the fluid passes through the edge portion 121 of the protrusion, it is divided by the next tip portion 122 to generate a periodic flow. Further, the fluid flow in the lateral direction is generated by the pointed portion 122, and a vortex is generated in the concave portion of the scale-like portion 12 by circulation (that is, the field is disturbed and vortexed every time the fluid passes through the concave portion). Convection occurs). Vortex flow increases with Reynolds number and increases.

  In addition, a fluid having a surface higher than that of the main body 10 is mixed to form a secondary flow, thereby strengthening the fluid turbulence and increasing the efficiency of heat dissipation.

  The surface of the inclined scale portion 12 not only increases the heat conduction area, but also periodically breaks the boundary layer and develops the boundary layer again. Such a flow configuration can increase and improve the mixing between the fluids as the vortex flow increases, thereby increasing the efficiency of heat conduction.

  Further, when the fluid passes through the convex portion 11, the fluid is concentrated toward the surface center line. Furthermore, it reverses and flows in the direction of the main field, mixes with the fluid of the main field, generates secondary flows, and breaks the uniform flow. This destroys the boundary layer and increases the intensity of turbulence intensity. In addition to this, an excess heat conduction area is provided and the heat conduction function is improved.

  The above is a preferred embodiment of the present invention, and does not limit the scope of implementation of the present invention. Accordingly, any modifications or changes that can be made by those skilled in the art, which are made within the spirit of the present invention and have an equivalent effect on the present invention, are included in the scope of the utility model registration claim of the present invention. Shall be.

It is a perspective view of the thermal radiation structure by this device. It is side surface explanatory drawing of the thermal radiation structure disclosed in FIG. It is a local enlarged view of the surface of the thermal radiation structure disclosed in FIG. It is explanatory drawing which showed the state which a vortex | eddy_current generate | occur | produces in the thermal radiation structure by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Main body 11 Convex part 111 1st convex part 112 2nd convex part 12 Scale-like part 121 End edge part 122 Pointed end part 123 Surface

Claims (12)

A heat dissipating structure comprising a main body having at least one surface and a heat conduction enhancing portion provided on the surface,
The surface of the heat conduction strengthening portion is excluded from at least one convex portion provided at a distance from the surface and protruding slightly higher than the surface, and a position on the surface where the convex portion is provided. A plurality of scaly portions provided so as to be recessed from,
The scaly part forms an angle of attack on the surface, and has an end edge part and a pointed end part, and the pointed end part is formed so as to be in contact with the edge part of the adjacent scaly part,
The projecting portion and the scaly portion are configured to generate a vortex and a secondary flow in the fluid approaching the surface, and to destroy the boundary layer that increases the thickness, thereby increasing the heat conduction efficiency. Heat dissipation structure.   The said scaly part is provided so that it may cross | intersect back and forth, and each tip part is provided so that it may correspond to the edge part of the scaly part located in front of it, and it may respond | correspond. Heat dissipation structure.   The heat dissipating structure according to claim 1, wherein the scales are dispersed.   The heat dissipation structure according to claim 1, wherein the scale-like portion is disposed on the surface of the main body so as to be inclined in a single direction.   The heat dissipating structure according to claim 1, wherein the scale-like portions are relatively inclined.   The heat dissipation according to claim 1, wherein the convex portion includes at least one or more first convex portions, and the first convex portion extends from one side of the surface to the other side. Structure.   The convex portion includes at least one first convex portion and a second convex portion, and the first convex portion and the second convex portion are directed from both sides of the surface toward the center line in the longitudinal direction of the surface. The heat dissipating structure according to claim 1, wherein the heat dissipating structure is formed symmetrically by extending and intersecting.   2. The heat dissipation structure according to claim 1, wherein a depression angle is formed at a location where the first convex portion and the second convex portion intersect.   The heat dissipating structure according to claim 1, wherein the scale-like portion is selected from a circle, a rhombus, and a triangle, or a combination of these is crossed.   The heat dissipation structure according to claim 1, wherein a surface of the scale portion is a flat surface.   The heat dissipation structure according to claim 1, wherein the convex portion is square.   The heat dissipation structure according to claim 1, wherein the convex portion is semicircular.

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