JPH09246439A - Cooling mechanism for heating component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize uniform thermal conductivity and improvement in cooling efficiency, by using a thermal conduction component made of a shape memory metal memorizing a shape corresponding to a predetermined temperature as a heat medium between a heating component and a radiation component. SOLUTION: Shape memory metals, for example, of rectangular-columnar shape, may be changed in height by causing the cross section to change from a rhombic shape to a square at a predetermined modification temperature so that the angle made by each side becomes a right angle. Such shape memory metals are connected in parallel to form a flat plate. A thermal conduction component 1 made of the shape memory metal memorizing a shape corresponding to a predetermined temperature is used as a heat medium between a heating component 2 and a radiation component 3, so as to conduct the heat of the heating component 2 to the radiation component 3. By this means, a change in height of the thermal conduction component 1 of the shape memory metal along with a rise in temperature increases the contact stress between the heating component 2 and the radiation component 3, and elastic deformation increases the contact area. Thus, the thermal resistance between the heating component and the radiation component is reduced, thereby enabling efficient thermal conduction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling mechanism for heat-generating components of electronic equipment, and provides a cooling mechanism having high heat conduction efficiency.

[0002]

2. Description of the Related Art In recent years, the amount of heat generated from components mounted on electronic equipment tends to increase with the improvement in performance, and the installation of a cooling mechanism is important for ensuring the reliability of electronic equipment. Has become a technical issue. As shown in FIG. 7 (a), the conventional cooling mechanism has a heat conductive sheet 2 having elasticity.
1 is inserted between the heat-generating component 22 and the heat-radiating component 23 to enhance heat conduction between the heat-generating component 22 and the heat-radiating component 23, and to reduce the thermal resistance to cool the heat-generating component 22.

[0003]

In such a conventional cooling mechanism, as shown in FIG. 7 (b), a plurality of heat-generating components are collectively formed into a single heat-radiating component in order to reduce the number of components and improve manufacturing efficiency. If you try to cool with, the contact pressure becomes uneven due to the dimensional tolerance resulting from the finished height of the heat-generating component, the solder amount of the component lead, and the flatness of the lead, making it difficult to equalize thermal conductivity. However, there is a problem that it is difficult to adjust the overall temperature balance.

[0004]

In order to solve the above problems, the present invention provides a heat medium for a heat-generating component and a heat-radiating component,
A heat-conducting component made of a shape-memory metal that memorizes a shape corresponding to a predetermined temperature. The shape changes when the temperature rises, the contact pressure between the heat-generating component and the heat-radiating component increases, and the heat conductivity increases to increase the heat-generating component. The heat of the heat is conducted to the heat dissipation component. By adopting such technical means, we provide a cooling mechanism that can equalize thermal conductivity, improve cooling efficiency, and control the temperature between heat-generating components.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, in FIG. 1, as a preferred embodiment, for example, a prism is used, and the cross section changes from a rhombus (FIG. 1a) to a square at a predetermined transformation temperature, and the angles between the sides become right angles. The shape-memory metal whose height can be changed (Fig. 1b) is connected in parallel to form a flat plate, and the heat-conducting component 1 made of the shape-memory metal that memorizes the shape corresponding to the predetermined temperature is radiated with the heat-generating component 2. As a heat medium with the component 3, the heat of the heat generating component 2 is configured to be conducted to the heat radiating component 3.
By this means, the contact pressure between the heat-generating component 2 and the heat-dissipating component 3 is increased due to the change in the height of the heat-conducting component 1 made of a shape memory metal as the temperature rises, and the contact area is also increased by elastic deformation. Therefore, the thermal resistance between the heat generating component and the heat radiating component is reduced, and the effect of improving the efficiency of heat conduction is obtained.
It is also possible to use the clamp 4 for fixing the heat generating component 2 and the heat radiating component 3 together, as described later.

Next, in FIG. 2, shape memory metals whose cross-sectional shape and height can be changed at a predetermined transformation temperature are connected in parallel to form a flat plate, and the shape corresponding to this predetermined temperature is stored. The heat conducting component 1 made of a shape memory metal is arranged as a heat medium between the single heat generating component 2 and the single heat radiating component 3 so that the heat of the single heat generating component 2 is conducted to the single heat radiating component 3. Configured to. By this means, the contact pressure between the single heat-generating component 2 and the single heat-radiating component 3 is increased due to the change in the height of the heat-conducting component 1 made of shape memory metal as the temperature rises, and the contact area is also increased by elastic deformation. To do. Therefore, the thermal resistance between the single heat-generating component and the single heat-radiating component is reduced, and the effect of increasing the efficiency of heat conduction is obtained.

Further, in FIG. 3, a shape-memory metal whose cross-sectional shape and height can be changed at a predetermined transformation temperature is connected in parallel to form a flat plate shape, and a shape corresponding to the predetermined temperature is memorized. The heat-conducting component 1 made of a memory metal is arranged as a heat medium between a plurality of heat-generating components 2 having similar heat-generating properties and a single heat-radiating component 6 so that heat of the plurality of heat-generating components 2 having similar heat-generating properties is isolated. One heat dissipation component 6 is configured to conduct heat. By this means, the contact pressure between the plurality of heat-generating components 2 having a similar heat-generating characteristic and the single heat-radiating component 6 is increased by the change of the height of the heat-conducting component 1 made of shape memory metal with the temperature rise, and the elastic deformation is caused. This also increases the contact area. Therefore, the thermal resistance is reduced, and the effect of increasing the efficiency and equalizing the heat conduction is obtained.

Further, in FIG. 4, a shape-memory metal whose cross-sectional shape and height can be changed at a predetermined transformation temperature is connected in parallel to form a flat plate shape, and the shape corresponding to the predetermined temperature is memorized. A plurality of heat-conducting components 1a, 1b, 1c made of a memory metal and having different transformation temperatures are used as a plurality of heat-generating components 2a, 2b, 2 having different heat-generating characteristics.
Corresponding to c, it is arranged as a heat medium between the single heat dissipation component 6 and a plurality of heat dissipation components 2a having different heat generation characteristics.
The heat of 2b, 2c is conducted to the single heat dissipation component 6. By this means, the contact pressure between the heat-generating components 2a, 2b, 2c and the single heat-dissipating component 6 is increased by the change in the height of the heat-conducting components 1a, 1b, 1c made of shape memory metal as the temperature rises, and the elasticity is increased. The deformation also increases the contact area. Therefore, the thermal resistance is reduced, the efficiency of heat conduction is improved and equalized, and especially for the heat-generating component 2b having a rapid temperature rise and abrupt characteristics, the heat of the shape memory metal having the lower transformation temperature is used. The conductive component 1b is arranged so that the entire single heat-dissipating component 6 initially radiates heat, and the other heat-generating component 2a.
The effect that enables the adjustment of the heat radiation balance with 2c is obtained.

Next, in FIG. 5, as a preferred form, for example, a prism is composed of a support 7 which is composed of, for example, a prism and is capable of changing its shape from a bent shape in the middle to a straight shape at a predetermined transformation temperature. For example, the support portion 7
A column portion 8 capable of changing the same shape as the above is fixed, and a clamp 4 that serves as both heat conduction and fixing between the heat generating component 2 and the heat radiating component 3 is configured. By this means, as the temperature rises, the contact pressure between the heat-generating component 2 and the heat-radiating component 3 changes the shape of the support portion 7 and the support portion 8 from a bent dogleg shape in the middle to a straight shape. And the heat radiating component 3 change due to the change in the distance between
The contact pressure between the heat generating component 2 and the heat dissipating component 3 also increases due to the elastic deformation of the heat conducting sheet 5. Therefore, the thermal resistance is reduced and the effect of improving the efficiency of thermal conductivity is obtained. It should be noted that in the clamp 4, even if only the support portion 7 that holds down the heat-generating component 2 and the heat-radiating component 3 is made of shape memory metal, only the column portion 8 that secures a predetermined distance between the two support portions is made of shape memory metal. Alternatively, the heat conducting component 1 made of a shape memory metal may be additionally disposed between the heat generating component 2 and the heat radiating component 3.

Next, referring to FIG. 6, as a preferred form, a shape memory metal whose height and surface area can be changed by changing from a polyhedron such as a hexahedron to a spherical shape or a shape close to a spherical shape at a predetermined transformation temperature. The formed heat conductor 9 is formed by mixing it with the elastic heat conductive sheet 5 arranged between the heat generating component 2 and the heat radiating component 3. By this means, the contact pressure between the heat generating component 2 and the heat radiating component 3 is increased by the change in the height of the heat conductor 9 made of shape memory metal with the temperature rise, and the heat generating component 2 and the heat radiating component 3 are elastically deformed. The contact area between the two also increases. Therefore, the heat resistance can be reduced and the heat conduction surface area can be increased as compared with the case of using the heat conduction sheet alone, and the effect of improving the efficiency of heat conductivity can be obtained. By changing the arrangement density by increasing or decreasing the number of the heat conductors 9 made of shape memory metal to be mixed in the heat conducting sheet 5, it is possible to add variability in heat conduction and adjust the heat radiation balance between the heat generating components 2. .

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cooling mechanism using a heat conducting component 1 made of shape memory metal according to the present invention shown in FIGS. 1 to 6 will be described below with reference to the drawings. FIG. 1 is a structural diagram of a cooling mechanism according to the principle of the present invention. In the figure, the shape memory metal is a prism whose cross section changes from a rhombus (Fig. 1a) to a square at a predetermined transformation temperature and the angles between the sides become right angles, so that the height can be changed (Fig. 1b). Are connected in parallel to form a flat plate,
The heat conducting component 1 made of a shape memory metal that stores the shape corresponding to the predetermined temperature is used as a heat medium between the heat generating component 2 and the heat radiating component 3 to conduct the heat of the heat generating component 2 to the heat radiating component 3. . Therefore, it is necessary to fix the screwing (not shown in FIG. 1) between the printed circuit board on which the heat-generating component 2 is mounted and the heat-radiating component 3 so that the heat of the heat-generating component 2 is conducted to the heat-radiating component 3 as the temperature rises. The contact pressure was increased by changing the height of the heat-conducting component 1 made of a shape memory metal so as to reduce the heat resistance, thereby promoting the action of heat conduction.

FIG. 2 is a structural view of the cooling mechanism of the first embodiment. In the figure, a shape memory metal whose cross-sectional shape and height can be changed at the above-mentioned predetermined transformation temperature is connected in parallel to form a flat plate, and a shape-memory metal that remembers the shape corresponding to this predetermined temperature is used. The heat-conducting component 1 consisting of
It is arranged between the heat dissipating component 3 and the heat dissipating component 3 so that the heat of the heat generating component 2 is conducted to the heat dissipating component 3. Therefore, heat-generating component 2
The heat resistance of the heat-radiating component 3 is reduced by heat conduction of the heat of the heat-generating component 2 to the heat-radiating component 3 by fixing (not shown in FIG. 2) the printed circuit board on which the heat-radiating component 3 is mounted by screwing. As described above, the contact pressure is increased by changing the height of the heat-conducting component 1 made of shape memory metal to promote the action of heat conduction.

FIG. 3 is a structural view of the cooling mechanism of the second embodiment. In the figure, the shape memory metal whose cross-sectional shape and height can be changed at the predetermined transformation temperature is connected in parallel to form a flat plate shape, and the shape memory metal that remembers the shape corresponding to this predetermined temperature is used. The heat-conducting component 1 is arranged between the plurality of heat-generating components 2 having the same heat-generating property and the single heat-radiating component 6, and the heat of the plurality of heat-generating components 2 having the same heat-generating property is conducted to the single heat-radiating component 6. Configured to let. Therefore, heat-generating component 2
Conducting heat transfer from the heat generating component 2 to the single heat radiating component 6 by fixing (not shown in FIG. 3) the screw mounting the printed circuit board on which the heat radiating component 6 is mounted together with the temperature rise. The contact pressure was increased by changing the height of the heat-conducting component 1 made of shape memory metal so as to reduce the heat resistance, thereby promoting the action of heat conduction.

FIG. 4 is a structural view of the cooling mechanism of the third embodiment. In the figure, shape memory metals capable of changing the cross-sectional shape and the height at the predetermined transformation temperature are connected in parallel to form a flat plate, and the shape corresponding to the predetermined temperature Heat is generated by arranging heat conducting parts 1a, 1b, 1c made of a plurality of different shape memory metals between a single heat radiating part 6 corresponding to a plurality of heat generating parts 2a, 2b, 2c having different heat generating characteristics. Parts 2a, 2
The heat of b and 2c is conducted to the single heat dissipation component 6. Therefore, by fixing the printed circuit board on which the heat-generating components 2a, 2b, 2c are mounted and the single heat-radiating component 6 by screwing (not shown in FIG. 4), the heat of the heat-generating component 2 is transferred to the single heat-radiating component 6.
The heat conducting parts 1a, 1b made of a shape memory metal so that the heat resistance is reduced as the temperature rises.
The contact pressure was increased by changing the height of 1c to promote heat conduction. Especially for the heat-generating component 2b having a rapid temperature rise and abrupt characteristics, the heat-conducting component 1b made of the shape memory metal having a lower transformation temperature is arranged to initially radiate heat by the single heat-radiating component 6 and other components. It is possible to adjust the heat radiation balance with the heat generating parts 2a, 2c.

FIG. 5 is a structural view of the cooling mechanism of the fourth embodiment. In the figure, a support portion 7 formed of a prism and capable of changing its shape from a bent shape in the middle to a straight shape at a predetermined transformation temperature, and a support portion 7 formed of a prism and having the same shape change as the support portion 7 described above. Supporting pillar 8
Are fixed by screwing or the like to form a clamp 4 which serves as both heat conduction and fixing between the heat generating component 2 and the heat radiating component 3. Therefore, by changing the shape of the support portion 7 and the support portion 8 from a bent shape in the middle to a straight shape as the temperature rises, the thermal resistance changes due to the change in the distance between the heat generating component 2 and the heat radiating component 3. The contact pressure was increased so as to decrease the thermal conductivity. Even if only the support portion 7 for pressing the heat-generating component 2 and the heat-dissipating component 3 into the clamp 4 is made of shape memory metal, only the column portion 8 which secures a predetermined distance between the two support portions is made of shape memory metal. Alternatively, the heat conducting component 1 made of a shape memory metal may be additionally disposed between the heat generating component 2 and the heat radiating component 3.

FIG. 6 is a structural view of the cooling mechanism of the fifth embodiment. In the figure, a heat conductor 9 made of a shape memory metal whose height and surface area are changed by changing from a polyhedron such as a hexahedron to a spherical shape or a shape close to a spherical shape at a predetermined transformation temperature is used as the heat generating component 2 and the heat radiating component 3. It was mixed in the heat conductive sheet 5 having elasticity arranged between the and. Therefore, the heat conduction of the heat of the heat generating component 2 to the heat radiating component 3 by fixing the printed circuit board on which the heat generating component 2 is mounted and the heat radiating component 3 by screwing (not shown in FIG. 6) is accompanied by a temperature rise. The contact pressure was increased and promoted by changing the height of the heat conductor 9 so that the heat resistance was decreased. The arrangement density may be changed in accordance with the heat generation characteristics of the heat generating component 2 by increasing or decreasing the number of the heat conductors 9 made of shape memory metal mixed in the heat conductive sheet 5.

[0017]

The effects of the present invention described above will be described in the order of claims. In the cooling mechanism having the configuration according to claim 1, the heat of the heat-generating component is radiated by using the heat-conductive component made of a shape-memory metal that stores a shape corresponding to a predetermined temperature as a heat medium of the heat-generating component and the heat-radiating component. Because it conducts heat to
This heat conducting part is made of metal and can improve the heat conducting effect more than the heat conducting sheet. Furthermore, since no heat conductive sheet is used, there is little change over time due to heat stress.

In the cooling mechanism having the structure according to the second aspect of the present invention, the heat conducting component made of a shape memory metal is arranged between the heat generating component and the heat radiating component to conduct the heat of the heat generating component to the heat radiating component. In addition to the effects of the first aspect, the assembly and the replacement of parts are facilitated.

According to another aspect of the cooling mechanism having the structure of the present invention, the heat-conducting component made of a shape memory metal is arranged between the plurality of heat-generating components and the single heat-dissipating component so that the heat of the plurality of heat-generating components is isolated. Since heat is conducted to one heat dissipation component, the number of components is reduced and manufacturing efficiency is improved in addition to the effect of the first aspect.

In the cooling mechanism having the structure according to the fourth aspect, the heat of a plurality of heat-generating components made of a plurality of shape memory metals having different transformation temperatures and having different heat-generating characteristics is converted into a single heat-radiating component. In addition to the effect of claim 1, since heat is conducted, heat is initially radiated by the single heat radiating component as a whole, especially for heat generating components with rapid temperature rise and abrupt characteristics, and temperature balance with other heat generating components is adjusted. Is possible.

In the cooling mechanism having the structure according to the fifth aspect, the shape memory metal is used as a clamp for conducting and fixing heat between the heat-generating component and the heat-radiating component, and the shape-changing of the clamp causes the heat-generating component and the heat-radiating component to change. Since the contact pressure between them is increased to reduce the thermal resistance, it is possible to reduce the screw fixing in addition to the effect of the first aspect.

In the cooling mechanism having the structure according to the sixth aspect of the present invention, the heat conducting sheet made of the shape memory metal is mixed and formed in the heat conducting sheet disposed between the heat generating component and the heat radiating component. The surface area can be expanded, and in addition to the effect of claim 1, the temperature balance between the heat-generating components can be adjusted.

[Brief description of drawings]

FIG. 1 is a principle diagram of the present invention.

FIG. 2 is a structural diagram of the first embodiment of the present invention.

FIG. 3 is a structural diagram of a second embodiment of the present invention.

FIG. 4 is a structural diagram of a third embodiment of the present invention.

FIG. 5 is a structural diagram of a fourth embodiment of the present invention.

FIG. 6 is a structural diagram of a fifth embodiment of the present invention.

FIG. 7 is a structural diagram of a conventional example.

[Explanation of symbols]

 1 heat conduction part 2 heat generation part 3 heat dissipation part 4 clamp 5 heat conduction sheet 6 single heat dissipation part 7 support part 8 support part 9 heat conductor

Claims (6)

[Claims] 1. A heat medium for a heat-generating component and a heat-radiating component,
A cooling mechanism for a heat-generating component, comprising a heat-conducting component (1) made of a shape-memory metal that stores a shape corresponding to a predetermined temperature. 2. The cooling mechanism for a heat-generating component according to claim 1, wherein the heat-conducting component (1) is arranged between the heat-generating component (2) and the heat-radiating component (3). 3. The heat conducting component (1) is arranged between a plurality of heat generating components (2) having similar heat generating characteristics and a single heat radiating component (6). Item 2. A cooling mechanism for a heat-generating component according to item 2. 4. The heat conducting component (1) is made of a plurality of shape memory metals having different transformation temperatures, which are arranged corresponding to a plurality of heat generating components (2a, 2b, 2c) having different heat generating characteristics. The cooling mechanism for a heat-generating component according to claim 1, which is a heat-conducting component (1a, 1b, 1c). 5. The heat conducting component (1) is used as a clamp (4) for a component for conducting and fixing heat between a heat generating component (2) and a heat radiating component (3). 1. A cooling mechanism for heat-generating components as described in 1. 6. The heat-conducting component (1) comprises a heat-conducting sheet (5) in which a heat conductor (9) made of the shape memory metal is arranged between a heat-generating component (2) and a heat-dissipating component (3). The cooling mechanism for the heat-generating component according to claim 1, wherein the cooling mechanism is formed by being mixed with (1).