CN2743974Y - Heat dissipation structure - Google Patents

Abstract

The utility model discloses a heat dissipation structure, which has a shell, which is placed on a material with low thermal conductivity, and a heat conductor, which is placed in the shell and forms at least an air gap with the shell , through the air gap to reduce the conductivity between the heat spreader and the shell, and then increase the thermal resistance from the heat spreader to the shell, so that the temperature of the bottom surface of the shell is reduced and averaged, effectively improving the life, safety and reliability of the product.

Description

Heat dissipation structure

technical field

The utility model relates to a heat dissipation structure, in particular to a heat dissipation structure in which an air gap is formed between a heat conductor composed of different materials and an electronic device shell.

Background technique

The heat dissipation method of the heating element inside the general electronic device is to combine a heat sink with the heating element to reduce the temperature of the heating element, and when the electronic device is placed on a material with low thermal conductivity, the central part of the bottom of the electronic device is due to Unable to dissipate heat, the surface temperature of the central part of the bottom is higher than that of the rest.

In order to improve the above-mentioned shortcomings, Taiwan Patent No. 447693 discloses an average heat dissipating device, which mainly includes a first heat conductor, which has a first part for absorbing heat energy from the heating element, and has a second portion not in contact with the heating element, and a second heat conductor having a first portion of relatively low thermal conductivity for contacting the first portion of the first heat conductor and having a first portion of relatively high thermal conductivity The second part is used to contact the second part of the first heat conductor to transfer heat energy from the first heat conductor to the casing.

The heating element announced in the No. 447693 patent first contacts the first part of a first heat conductor with high thermal conductivity, and the first part of the first heat conductor contacts with the first part of a second heat conductor with low thermal conductivity , and transfer the heat energy in the first heat conductor to the casing, so the above structure is related to the position of the heating element. When different electronic devices have different positions of the heating element, the second heat conductor needs to follow the difference The location of the first part with low thermal conductivity is matched with the location of the first part, which causes inconvenience in production, and needs to design different heat conductors according to different electronic devices, resulting in increased cost.

Contents of the invention

The purpose of this utility model is to provide a heat dissipation structure, that is, to increase the thermal resistance from the internal heating element to the shell by means of the air gap formed between the heat conductor and the shell, so that the bottom surface of the shell of the electronic device placed on a low thermal conductivity material average temperature.

In order to achieve the above purpose, the heat dissipation structure of the present invention includes a shell, the shell is placed on a material with low thermal conductivity, and a heat conductor, the heat spreader is placed in the shell, and at least an air gap is formed between the shell and the shell.

The shell is placed on a material with low thermal conductivity.

The material with low thermal conductivity can be wood board, carpet or clothing.

The heat spreader can be matched with a shell with a flat bottom and provided with a protrusion, so that an air gap is formed between the heat spreader and the shell.

The heat spreader can be matched with a shell with integrally formed shoulders, so that an air gap is formed between the heat spreader and the shell.

The heat conductor can be matched with a casing with integrally formed convex parts, so that an air gap is formed between the heat conductor and the casing.

The material of the heat conductor can be a material with good thermal conductivity, such as copper or aluminum.

The air gap can be a material with low thermal conductivity, such as foam or foam material.

The material of the shell shoulder can be plastic or metal.

The heat dissipation structure in the utility model uses the air gap to reduce the conductivity between the heat conductor and the shell, and then increases the thermal resistance from the heat conductor to the shell, so that the temperature of the bottom surface of the shell is reduced and averaged, effectively improving the life and safety of the product and reliability.

Description of drawings

The specific embodiments of the present utility model will be described in further detail below in conjunction with the accompanying drawings.

Fig. 1 is a three-dimensional exploded view of the heat dissipation structure in Embodiment 1 of the present utility model;

Fig. 2 is a combined perspective view of the heat dissipation structure in Embodiment 1 of the present utility model;

Fig. 3 is a cross-sectional view of the heat dissipation structure shown in Fig. 2 along line X-X;

Fig. 4 is a three-dimensional exploded view of the heat dissipation structure in the second embodiment of the utility model;

Fig. 5 is a three-dimensional exploded view of the heat dissipation structure in Embodiment 3 of the present utility model;

Fig. 6 is a combined perspective view of the heat dissipation structure shown in Fig. 5;

Fig. 7 is a cross-sectional view of the heat dissipation structure shown in Fig. 6 along the Y-Y line;

Fig. 8 is a cross-sectional view of the heat dissipation structure in Embodiment 4 of the present utility model;

Fig. 9 is a cross-sectional view of the heat dissipation structure in Embodiment 5 of the present utility model.

Detailed ways

As shown in Figure 1, the heat dissipation structure 100 in the first embodiment of the present utility model includes a shell 2, the shell 2 has a bottom 20; The extended vertical portion 11 is provided with a convex portion 12 at the center of the bottom 10 .

As shown in Figures 1 and 2, the bottom 20 of the casing 2 in the first embodiment is a flat bottom surface, and the casing 2 is placed on a material with low thermal conductivity, which can be wood board, carpet or clothing material, and the heat conductor 1 is placed in the shell 2, and an air gap 13 is formed by overlapping the convex portion 12 of the heat conductor 1 and the bottom 20 of the shell 2, as shown in Figure 3, the material of the heat conductor 1 is A material with good thermal conductivity, such as copper or aluminum, and a heating element (not shown in the figure) is placed on the top of the heat conductor 1, and the heat energy generated by the heating element is evenly absorbed by the heat conductor 1. The air gap 13 formed by the heat spreader 1 and the shell 2 reduces the conductivity between the heat spreader 1 and the shell 2, thereby lowering the temperature of the surface at the bottom center of the shell 2, forming the heat dissipation structure 100 of the present invention.

As shown in FIG. 4 , the heat dissipation structure 100 in Embodiment 2 of the present invention is transformed from the heat dissipation structure shown in FIG. 1 , which includes a casing 2 having a bottom 20 ; and a heat conductor 1 , the heat conductor 1 has a bottom 10 and a vertical portion 11 vertically extending upward from the bottom 10, and a convex portion 12 is integrally formed on the bottom 10, so that a groove 14 is formed at the bottom of the heat conductor 1, and the groove 14 It overlaps with the bottom 20 of the shell 2 to form an air gap 13 (shown in FIG. 3 ), which increases the thermal resistance from the heat spreader 1 to the shell 2, and reduces the temperature of the surface of the central part of the bottom of the shell 2, which forms the utility model. The heat dissipation structure 100 in the novel.

As shown in Figure 5, the heat dissipation structure 100 in the third embodiment of the present utility model includes a shell 2, the shell 2 has a bottom 20; a first heat conductor 3, the first heat conductor 3 has a bottom 10 and 10 a vertical portion 11 extending vertically upward; and a second heat conductor 4 , the second heat conductor 4 is a hollow body, and the second heat conductor 4 is arranged around the edge of the bottom of the shell 2 .

As shown in Fig. 5 and Fig. 6, the heat dissipation structure 100 in the third embodiment is to place the shell 2 on a material with low thermal conductivity, the material with low thermal conductivity can be wood board, carpet or clothing, etc., and the second A heat conductor 3 is stacked on the second heat conductor 4, and the bottom 10 of the first heat conductor 3 is a flat bottom surface, and an air gap is formed by stacking the flat bottom 10 of the first heat conductor 3 and the second heat conductor 4 Gap 13, as shown in Figure 7, and the material of the bottom plate of the housing 2 can be plastic or metal, and the material of the first heat spreader 3 and the second heat spreader 4 is a material with good thermal conductivity, such as copper or aluminum, etc. material, and a heating element (not shown) is placed on the top of the first heat conductor 3, and the heat energy generated by the heating element is evenly absorbed by the first heat conductor 3, and then the first heat conductor 3 and the The air gap 13 formed by the second heat spreader 4 reduces the conductivity between the first heat spreader 3 and the casing 2 , thereby lowering the temperature of the surface of the bottom central part of the casing 2 , forming the heat dissipation structure 100 of the present invention.

As shown in Figure 7, when the first heat conductor 3 absorbs the heat energy generated by the heating element, because the first heat conductor 3 is made of a material with good thermal conductivity, it can evenly absorb the heat energy generated by the heating element, and through the first heat conductor 3 The air gap 13 formed by the flat bottom 10 of the first heat spreader 3 and the second heat spreader 4 increases the thermal resistance from the first heat spreader 3 to the shell 2 and reduces the surface temperature of the bottom central part of the shell 2 .

As shown in Figure 8, the heat dissipation structure in Embodiment 4 of the present utility model includes a housing 2 integrally formed with a shoulder 22 on the bottom edge; a heat conductor 1 having a bottom 10 and consisting of The vertical part 11 extending vertically upwards from the bottom 10, wherein the shoulder 22 forms an air gap 13 with the heat conductor 1 on the flat bottom surface, so that the thermal resistance from the heat conductor 1 to the shell 2 is increased, and the temperature of the central part of the bottom of the shell 2 is lowered .

As shown in Figure 9, the heat dissipation structure in Embodiment 5 of the present utility model includes a housing 2, which is integrally formed with a convex portion 23 at the center of the bottom; a first heat conductor 3, the first heat conductor 3 It has a bottom 10, a vertical portion 11 extending vertically upwards from the bottom 10, and a second heat conductor 4, which is made of a material with high thermal conductivity and placed on both sides of the convex portion 23, and the shell 2 is A lower thermal conductivity material, the thermal resistance from the central part of the structure to the bottom 20 of the shell is higher than that of the surrounding parts, so that the surface temperature of the central part of the bottom 20 of the shell is lowered.

In addition, although the above-mentioned multiple specific embodiments in the utility model have been described in detail, those familiar with the technology can clearly understand that various changes and changes can be made without departing from the design spirit of the utility model. It is not limited to the embodiments mentioned in the specification, for example, the air gap formed by the heat spreader and the casing in the second embodiment can be replaced with a material with low thermal conductivity, such as foam, foam material and the like.

Claims (18)

1. A cooling structure, characterized in that it comprises: casing; and A heat conductor, the heat conductor is placed in the casing, and at least one air gap is formed between the heat conductor and the casing. 2. The heat dissipation structure according to claim 1, wherein the housing is placed on a material with low thermal conductivity. 3. The heat dissipation structure according to claim 2, wherein the material with low thermal conductivity is wood board, carpet or clothing. 4 . The heat dissipation structure according to claim 1 , wherein the heat spreader is matched with a shell with a flat bottom, and a protrusion is provided to form an air gap between the heat spreader and the shell. 5 . The heat dissipation structure according to claim 1 , wherein the heat spreader is matched with a shell, and the shell has a shoulder portion integrally formed to form an air gap between the heat spreader and the shell. 6 . 6 . The heat dissipation structure according to claim 1 , wherein the heat spreader is matched with a casing, and the casing has a protruding portion integrally formed to form an air gap between the heat spreader and the casing. 7 . 7. The heat dissipation structure according to claim 1, wherein the material of the heat spreader is a material with good thermal conductivity. 8. The heat dissipation structure according to claim 7, wherein the heat conductor is made of aluminum or copper. 9. The heat dissipation structure according to claim 1, wherein the material of the air gap is foam or foam with low thermal conductivity. 10. The heat dissipation structure according to claim 5, wherein the shoulder is made of plastic or metal. 11. A heat dissipation structure, characterized in that it comprises: casing; and The heat conductor is provided with a protrusion that can form at least one air gap after being stacked with the shell. 12. The heat dissipation structure according to claim 11, wherein the material of the heat spreader is a material with good thermal conductivity. 13. The heat dissipation structure according to claim 12, wherein the material of the heat spreader is aluminum or copper. 14. The heat dissipation structure according to claim 11, wherein the material of the air gap is foam or foam with low thermal conductivity. 15. A heat dissipation structure, characterized in that it comprises: shell; the first heat conductor; and The second heat conductor is a hollow body, and the second heat conductor is arranged around the edge of the bottom of the casing; and at least one air gap is formed after the first heat conductor and the second heat conductor are stacked. 16. The heat dissipation structure according to claim 15, wherein the material of the first heat spreader and the second heat spreader is a material with good thermal conductivity. 17. The heat dissipation structure according to claim 16, wherein the first heat spreader and the second heat spreader are made of aluminum or copper. 18. The heat dissipation structure according to claim 15, wherein the air gap is made of foam or foam with low thermal conductivity.

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