JPH0483395A - Thermal controller - Google Patents

Abstract

PURPOSE:To use a thermally effective area of a mounting surface of a heat generator to a maximum limit by mounting the generator on a desired inner surface of a bottomless heating housing placed on a mounting base, and lining a wick immersed with refrigerant in the housing and on the entire upper surface of the base in the housing to enclose the generator. CONSTITUTION:When refrigerant included in a heat absorber 15a of a wick 15 in contact with a heat generator 6 is evaporated, heat generated from the generator 6 is input to vapor as evaporating latent heat, transferred to a mounting base 14, and externally dissipated from the base 14. Since the base 14 is lower than the temperature of the generator 6, vapor is phase-changed to liquid, transported heat quantity is transferred to a heating housing 13 as condensing head. Accordingly, it again becomes liquid, and continuously circulated to the absorber 15a in the wick 15 by a capillary tube action. That is, the wick 15 is brought into contact with the generator 6, the heat generated from the generator 6 is removed by the evaporating latent heat of the refrigerant, heat- transferred to the contact surface with the base 14 via the vapor, and discharged.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a heat control device for high-heat generating materials.

[Background Art] In recent years, electronic devices have become smaller and the heat density of the devices has increased accordingly. Therefore, a means is needed to efficiently release the generated heat to the outside of the device. As a means to solve this problem, there is a heat transport method using a heat pipe.

A general method of exhausting heat using heat pipe A is as shown in FIG. In the figure, 1 is a heating element, and 2 is a mounting base for the heating element 1! 1 to 3 are heat pipe bodies, which are hollow pipes in which a wick 4 having a narrow gap is inserted;
The inside is impregnated with refrigerant liquid. Reference numeral 5 denotes a heat dissipation section, in which heat generated by the heating element 1 reaches the left end 3a of the heat pipe main body 3 via the base 2. The refrigerant liquid is vaporized by this heat at the left end 3a, and is transferred to the heat pipe main body 3 in a gaseous state.
The heat passes through the inside and reaches the right side @3b, and is transmitted to the heat radiation section 5 and radiated to the outside. As a result of the heat removed, the vaporized refrigerant liquid liquefies and reaches the left end 3a of the heat pipe main body 3 again due to capillary action due to the narrow gap of the wick 4. Heat pipe body 3
The heat discharged by the heat pipe body 3 has low thermal resistance and has extremely high heat transport efficiency.

[Problems to be Solved by the Invention] However, even with the heat pipe A having such characteristics, the heating element 1 is not connected to the heat pipe main body 3 through the base 2 or the like.
Since the base 2 has its own thermal conductivity and the contact resistance of the base 2 exists, the thermal resistance between the heating element 1 and the heat pipe body 3 increases, making it impossible to fully utilize the features of the heat pipe A. There are drawbacks.

In order to solve this drawback, an example of a thermal control device B in which the heat generating material itself is housed in a so-called bottomless heat casing in which the bottomless casing is converted into a heat pipe is shown in FIG. 4. 0
This is an example of No. 47.198. In the same figure,
Reference numeral 6 is a heat generating element, which consists of a base W17 on which one heat generating element 6a is mounted, 8 is a bottomless heat casing, 9 is a wick inside the heat casing 8, 10 is a flat heat pipe lined with a wick 11, and 12 is a bottomless heat pipe. The flat heat pipe 10 on which the heat housing 8 is mounted is mounted on a stand. The wick 9 is attached to the heat generating element 6 which is also attached in contact with the heat generating element 6a and the base 7.
The heat generated from a is directly transported to the inner surface of the beat housing 8 by the latent heat of evaporation of the refrigerant liquid, and is diffused from the outer surface of the heat housing 8 to the outside and via the base 7 to the entire inside of the flat heat pipe 10 by the action of the wick 11. When mounted, heat is radiated from the base 12 to the outside. Due to this structure,
The thermal resistance between the heating element 6 and the wick 9 can be made extremely low.

By the way, in general, the heat radiation surface is often restricted. For example, when mounting the base 12 as the only heat radiation part, the base 7
When the size of the heat exchanger becomes larger or the number of heat exchangers increases, the amount of heat generated decreases in the area where steam can flow, so heat transport by latent heat is not sufficient, and the heat is radiated via the base plate 7. However, since the base plate 7 has low thermal conductivity and high contact thermal resistance, there is a drawback that heat radiation is insufficient because there is not enough area for heat radiation.

In view of the shortcomings of the conventional inventions, the present invention aims to provide a thermal control device that makes maximum use of the thermally effective area of the mounting surface of the heat generating element.

Means for Solving 1 Problem] The above problem is achieved by the present invention employing the following characteristic configuration means.

That is, the feature of the present invention is that the heating element is attached to the desired inner surface of the bottomless heat casing placed on the table, and the heating element is encapsulated, and the installation of the casing and the inside of the casing is carried out over the entire top surface of the table. This is a thermal control device lined with a wick impregnated with cold liquid IIX.

[Function] The present invention takes the above-mentioned measures, and includes a bottomless heat casing in which a heat generating material is mounted on the inner surface, and a mounting base that fixes the heat casing and radiates heat generated from the heat generating material to the outside. ,
The wick is made up of a wick lined on the inner surface of the casing and a refrigerant liquid impregnated into the wick, and the wick is brought into contact with a heat generating substance, and the heat generated from the heat generating substance is removed by the latent heat of vaporization of the refrigerant liquid. When installing, heat is transported by steam to the contact surface with the table and the heat is exhausted.

Excuse tumor case] Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view of this embodiment, and FIG. 2 is a sectional view taken along the line ■--■ in FIG. 1. The same numbers in FIG. 0 are given to the same parts as in FIG.

In the same figure, C is the heat control device of this embodiment, 13 is a bottomless heat casing that is mounted integrally on a stand 14, 15 is a bottomless heat casing that encloses a heating element 6, and is mounted inside the casing 13 and is mounted on a pedestal. 14
A wick is lined over the entire surface, and 16 is a rim to which the heat housing 13 is attached.

Since this embodiment exhibits such an n-like shape, the heat generated from the heating element 6 is absorbed by the heat absorbing portion 15a of the wick 15 that is in contact with the heating element 6.
When the refrigerant liquid contained in the refrigerant liquid evaporates, it is taken into the vapor as latent heat of vaporization, which is transmitted to the base 14, and the heat is radiated from the base 14 to the outside.

During installation, since the temperature of the stand 14 is lower than that of the heating element 6, the vapor changes its phase to a liquid there, and the transferred heat is transferred to the sleeve case 13 as T-ray heat, so it becomes a liquid again and flows inside the wick 15. is continuously circulated to the heat absorption section 15a by capillary action.

[Effects of the Invention] Thus, according to the present invention, the heat generated by the heat generating material can be efficiently transported to the mounting base, so that the temperature of the heat generating material can be made much lower than in the prior art. Therefore, temperature control is possible even in the case of high-density packaging and a large amount of heat generation, and an electronic device that generates a large amount of heat can be realized.

Note that although the present example shows the case where there is one heating element, the same effect can be obtained even when there is a plurality of heating elements. Further, the mounting surface of the heat generating material is not limited to the upper part, but may be the inner surface of the side.Furthermore, a heat pipe can be mounted inside the building to improve the heat dissipation efficiency of the stand.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an embodiment of the present invention, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Figs. 3 and 4 are structural explanations of a conventional beat pipe and a heat control device, respectively. It is a diagram. A...Heat pipe B, C...Heat control device 1
．． 6... Heating material 2, 7... Base 3... Pipe body 4.9, 11.15... Wick 5... Heat radiation part 6a... Heat generating element 8.1
3... Bottomless heat housing 10... Flat plate heat pipe

Claims (1)

[Claims] 1. A heating element is attached to a desired inner surface of a bottomless heat casing that is integrally mounted on a mounting base, and a wick that encloses the heating element and impregnates a refrigerant liquid over the entire upper surface of the casing and the mount inside the housing is lined. A thermal control device characterized by