JP3100190U - Liquid flow type heat conductive sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid flow type heat conductive sheet.
SOLUTION: A plurality of linear members 12 are arranged in parallel on a bottom layer inside a seat body in which a liquid is sealed, an interval between the bottoms of the linear members is a flow guide channel 15, and an upper portion of each linear member is covered. 13 and the circulation area 16 are formed, and when the bottom of the seat body and the heat source 20 come into contact with each other, the liquid absorbs the latent heat of the heat source, becomes a steam flow flowing toward the circulation area, performs repetitive circulation heat transfer, and conducts heat. The heat is quickly and uniformly transmitted to the heat sink 30 to enhance the cooling function.
[Selection diagram] Fig. 4

Description

The present invention relates to a kind of liquid flow type heat conduction sheet, and particularly to a heat conduction device between a heat source and a heat sink using a capillary phenomenon and a heat pipe principle. The present invention relates to a liquid-flow type heat conductive sheet which rapidly and uniformly reaches a heat sink, thereby enhancing a cooling function.

CPUs used in personal computers have not only evolved to meet the demands of application areas such as the Internet and multimedia in the future, but have also acquired the current market in combination with the high-performance operation of high clocks. Due to this tendency, the package design of the CPU itself pays attention to its heat radiation characteristics, thereby preventing the system from being damaged or stopped due to the high heat being not discharged when the CPU operates at high speed. Therefore, the operation function of the heat sink used in the CPU directly affects whether or not the CPU is maintained in a normal working temperature range, thereby affecting the normal operation of the personal computer.

In addition, the basic structure of a heat sink generally used for a CPU is that a heat sink main body having a cooling fin made of aluminum or copper material is brought into contact with a heat source of the CPU to conduct heat to the cooling fin portion and further cool down. A cooling air flow is generated by a fan provided above the fins and brought into contact with the air flowing through the cooling fins to achieve the purpose of cooling.

The basic structure of the heat sink used in conventional CPUs is that even if the cooling fins of the heat sink are integrally formed of aluminum material or formed of a combination of copper materials, the entire heat sink and heat source directly receive heat and conduct electricity. The cooling efficiency cannot be increased due to the low thermal conductivity of the material of the heat sink itself, and there is no apparent temperature difference between the contact surface between the cooling fins and the heat source. There is a problem that the conduction speed decreases and the expected cooling efficiency cannot be achieved. The present invention provides a liquid flow type heat conductive sheet that solves this problem.

The invention of claim 1 is a liquid-flow type heat conductive sheet mainly composed of a concave box-shaped seat body, a cover of a heat sink is installed above, the seat body is closed, and a liquid is sealed in the seat body.
A plurality of striation members are fixed inside the seat body, and the striation members are a striation structure having a wide cross section and gradually narrowing toward an upper portion and a bottom portion, and each striation member is parallel to each other. Is disposed on the inner bottom layer of the seat, a space between the bottoms of the respective strips is defined as a flow guide channel, a circulation area is formed between the top of each strip and the cover, and the bottom of the seat and the heat source When the liquid comes into contact, the liquid inside the seat absorbs the latent heat of the heat source to become a vapor flow that flows toward the circulation area, and after being radiated and solidified to become a liquid, it falls into the channel, and this recirculation type The liquid flow type heat conductive sheet is characterized in that the heat generated by the heat source is rapidly conducted by the heat conduction.
According to a second aspect of the present invention, there is provided the liquid-flow type heat conductive sheet according to the first aspect, wherein the linear member is a metal wire having a circular cross section provided on a bottom layer of the seat body. And
According to a third aspect of the present invention, there is provided the liquid-flow type heat conductive sheet according to the first aspect, wherein the linear member has a circular cross-sectional convex structure provided integrally with the seat body bottom layer. It is a heat conductive sheet.
According to a fourth aspect of the present invention, there is provided the liquid flow type heat conductive sheet according to the first aspect, wherein the linear member has an arrowhead-shaped cross-sectional convex structure integrally provided on a bottom layer of the seat body. It is a thermal conduction sheet.
According to a fifth aspect of the present invention, there is provided the liquid flow type heat conductive sheet according to the first aspect, wherein the ridge-shaped member has a conical convex cross-sectional structure integrally provided on a bottom layer of the seat body. It is a thermal conduction sheet.
According to a sixth aspect of the present invention, in the liquid flow type heat conductive sheet according to the first aspect, a groove is provided along a position where the linear member is provided on the inner bottom layer of the seat body to position the linear member. And a liquid flow type heat conductive sheet.
According to a seventh aspect of the present invention, in the liquid flow type heat conductive sheet according to the first aspect, a groove is provided in a bottom layer inside the seat body along a position where the ridge member is provided, thereby enhancing a liquid guiding function. And a liquid flow type heat conductive sheet.
The invention according to claim 8 is the liquid flow type heat conductive sheet according to claim 1, wherein the cover of the heat conductive sheet is integrally formed with the heat sink and the heat conductive sheet and the heat sink are directly joined. It is a thermal conduction sheet.

The present invention provides a kind of liquid flow type heat conductive sheet, in which a plurality of ridges are arranged in parallel on a bottom layer inside a seat body filled with liquid, and a distance between bottoms of the ridges is a flow channel. The upper part of each member forms a cover and a circulating area, and when the bottom of the seat comes into contact with the heat source, the liquid absorbs the latent heat of the heat source and becomes a steam flow that flows toward the circulating area. By circulating heat transfer, heat can be quickly and uniformly transmitted to the heat sink, and the cooling function can be enhanced.

The liquid flow type heat conductive sheet of the present invention utilizes a capillary phenomenon and a heat pipe principle, and a plurality of strip-shaped members are arranged in parallel in a seat inner bottom layer in which liquid is sealed, and a gap between the bottoms of the strip-shaped members is provided. Is a channel, and the top of each member forms a circulation area with the cover, and when the bottom of the seat comes into contact with the heat source, the liquid flows toward the circulation area after absorbing the latent heat of the heat source. It becomes a vapor flow, and this vapor flow uniformly reaches each part in contact with the upper part of the seat body of the heat sink, and after radiating and condensing into a liquid, falls into the conducting channel, thus repeatedly conducting a circulating heat conduction. The heat is quickly and uniformly transmitted to the heat sink to enhance the cooling function.

In particular, each of the members has a cross-sectional structure in which the cross section is wide in the middle and gradually narrows toward the top and the bottom, and when the steam flows toward an area where the temperature of the upper part of the seat is relatively low, The liquid introduced laterally into the area where the temperature is relatively low by the channel between the linear members, and the liquid condensed by heat radiation also smoothly falls into the channel through the cross-sectional shape of each linear member, forming a capillary phenomenon. Flow rapidly to the hot area, thus achieving the purpose of soaking heat transfer.

基本 The basic structure composition and the method of use of the heat conductive sheet of the liquid flow type heat conductive sheet of the present invention are as shown in FIGS. Among them, the heat conductive sheet 10 is mainly composed of a concave box-shaped seat body 11, a plurality of ridge members 12 are fixed inside the seat body 11, the cover 13 is combined and the seat body 11 is sealed, A heat conduction device between the heat source 20 and the heat sink 30 conducts heat to the heat sink 30 quickly and uniformly, and achieves the purpose of rapid cooling by the airflow generated by the fan 40 combined with the heat sink 30.

As shown in FIGS. 3 and 4, each of the linear members 12 in the seat body 11 has a cross-sectional structure that is wide at the middle and gradually narrows toward the top and bottom. The space between the bottoms of the is used as a flow guide channel 15 and is used for the flow of the liquid 14. At the time of distribution, the liquid 14 rapidly moves along the flow channel to form a capillary phenomenon. The upper portion of each strip 12 forms a flow area 16 with the cover 13, thus forming a complete heat conducting sheet 10 structure. Naturally, the cover of the heat conductive sheet can be integrally formed with the heat sink 30, thereby directly connecting the structure of the heat conductive sheet and the heat sink.

As shown in FIGS. 1, 3, and 4, in actual use, the entire heat conductive sheet 10 is in contact with the bottom of the seat 11 and the heat source 20, and the cover 13 on the top of the seat 11 and the heat sink 30. After the contact and the absorption of the latent heat of the heat source 20 by the liquid 14 sealed in the seat body 11, the liquid becomes a steam flow flowing toward the circulation area 16 as shown in FIG. After reaching the portion of the heat sink 30 that comes into contact with the heat conductive sheet 10, and after the heat is condensed to become a liquid, the liquid further falls into the flow guide channel 15, thus repeatedly performing circulating heat conduction to form the heat source 20. Heat is rapidly conducted to the heat sink 30 to enhance the cooling function.

In particular, each of the strip-shaped members 12 is a strip-shaped structure whose cross section is wide in the middle and gradually narrows toward the top and the bottom, and as shown in FIG. 6, a circular cross-section metal wire provided integrally with the bottom layer of the seat body 11, as shown in FIG. 6, or as shown in FIG. 7 and FIG. A convex structure having an arrowhead cross-section provided integrally with the bottom layer of the seat body 11, or a convex structure having a tip-shaped cross-section. It is a striated structure gradually narrowing toward. As a result, when the steam flows toward an area where the temperature of the upper part of the seat body is relatively low, the flow guide channel 15 between each of the ridges 12 guides the area laterally to the area where the temperature is relatively low, and heat radiation solidification occurs. Due to the cross-sectional shape of each of the ridges 12, the liquid that has flowed down smoothly into the channel 15 so that it quickly flows toward the high-temperature area to achieve the purpose of uniform heat conduction.

FIG. 9 and FIG. 10 are diagrams of the cooling efficiency curves obtained in the actual operation of the present invention, in the structure and arrangement of each ridge member 12, and in each condition. Among them, in FIG. 10, R represents the thermal resistance, which has a good cooling efficiency when the curve is relatively low, and describes the best combination of structures and arrangements of the respective linear members 12 at the time of implementation.

As shown in FIG. 2, the main mechanical structure of the entire heat conductive sheet 10 of the present invention is formed by closing the seat body 11 provided with the ridge member 12 and the liquid 14 in the circulation area 16. As shown in FIG. 9, a groove 17 is provided between each of the linear members 12 along the arrangement position of the linear member 12 on the inner bottom layer of the seat body 11, and a positioning action is formed on the linear member 12. At the same time, the liquid guiding effect is increased.

The above embodiment is a part of the preferred embodiment of the present invention, and does not limit the scope of the right of the present invention. It shall belong to the claims.

FIG. 4 is a view showing an appearance structure and a use arrangement state of the entire heat conductive sheet of the present invention. FIG. 3 is an exploded view of the heat conductive sheet of the present invention. FIG. 4 is a cross-sectional view of a radial structure showing a capillary structure of the heat conductive sheet in the present invention. FIG. 3 is an axial structural sectional view showing a capillary structure of the heat conductive sheet in the present invention. FIG. 3 is an enlarged cross-sectional view of the capillary structure in the present invention. FIG. 4 is an enlarged cross-sectional view of a capillary structure according to another embodiment of the present invention. FIG. 4 is an enlarged cross-sectional view of a capillary structure according to another embodiment of the present invention. FIG. 6 is an enlarged cross-sectional view of a capillary structure according to still another embodiment of the present invention. FIG. 4 is a diagram showing the structure and arrangement conditions of each of the strip members in the present invention. FIG. 4 is a diagram of a heat conduction efficiency curve obtained in a structure and an arrangement condition state of each strip-shaped member in the present invention.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 10 Heat conductive sheet 16 Circulation area 11 Seat 17 Groove 12 Strip member 20 Heat source 13 Cover 30 Heat sink 14 Liquid 40 Fan 15 Flow channel

Claims (8)

In a liquid flow type heat conductive sheet mainly composed of a concave box-shaped seat body, a cover of a heat sink is installed above and the seat body is closed, and a liquid is sealed in the seat body.
A plurality of striation members are fixed inside the seat body, and the striation members are a striation structure having a wide cross section and gradually narrowing toward an upper portion and a bottom portion, and each striation member is parallel to each other. Is disposed on the inner bottom layer of the seat, a space between the bottoms of the respective strips is defined as a flow guide channel, a circulation area is formed between the top of each strip and the cover, and the bottom of the seat and the heat source When the liquid comes into contact, the liquid inside the seat absorbs the latent heat of the heat source to become a vapor flow that flows toward the circulation area, and after being radiated and solidified to become a liquid, it falls into the channel, and this recirculation type A liquid flow type heat conductive sheet, characterized in that heat generated by a heat source is rapidly conducted by the heat conduction. {Circle around (1)} The liquid-flow type heat conductive sheet according to claim 1, wherein the ridge member is a metal wire having a circular cross section which is provided on the bottom layer of the seat body. A liquid-flow type heat conductive sheet according to claim 1, wherein the linear member has a circular cross-sectional convex structure integrally provided on the bottom layer of the seat body. The liquid flow type heat conductive sheet according to claim 1, wherein the ridge-shaped member has an arrow-head cross-sectional convex structure integrally provided on a bottom layer of the seat body. A liquid flow type heat conductive sheet according to claim 1, wherein the ridge-shaped member has a ridge-shaped cross-sectional convex structure integrally provided on a bottom layer of the seat body. 2. The liquid flow type heat conducting sheet according to claim 1, wherein a groove is provided in the bottom layer inside the seat body along a position where the line member is provided, and the groove member is positioned. Sheet. 2. The liquid flow type heat conductive sheet according to claim 1, wherein a groove is provided in the bottom layer inside the seat body along a position where the ridge member is provided, thereby enhancing a liquid guiding function. Type heat conductive sheet. 2. The liquid flow type heat conductive sheet according to claim 1, wherein a cover of the heat conductive sheet is integrally formed with the heat sink and the heat conductive sheet and the heat sink are directly joined.

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