JPS6054597B2 - heat transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat transfer device that seals a predetermined amount of a working medium in a hollow chamber and transports heat by utilizing a change in the gas phase of the working medium.

A conventional device of this type is shown in FIG.

In the figure, 1 is a cylindrical member, and 2 is an annular hollow chamber formed inside the cylindrical member 1, which is arranged substantially concentrically with the cylindrical member 1. 3 is a working liquid such as chlorofluorocarbon or ammonia sealed in a predetermined amount after the hollow chamber 2 is depressurized; 4
is the vapor obtained by vaporizing the working liquid 3.

Next, the operation will be explained.

For example, when heating is performed from the inner wall side of the cylindrical member 1,
The working liquid 3 in the hollow chamber 2 is vaporized and at that time takes away latent heat of vaporization from the inner wall side. The vapor 4 produced by the vaporization of the working liquid 3 moves upward as shown in the figure, condenses when it comes into contact with the lower temperature outer wall side, and releases the latent heat of condensation into the outer wall and the surrounding air. Then, the condensed and liquefied working liquid 3
falls downward due to gravity and returns to its original state. By sequentially repeating this operation, the amount of heat on the inner wall side is transported to the outer wall side and cooling is performed. At this time, if the temperature distribution on the inner wall side is non-uniform, the amount of evaporation in the high-temperature portion increases, and the amount of heat taken away also increases, and the temperature distribution as a whole becomes uniform. Since the conventional device was constructed as described above, when the amount of evaporation of the working liquid 3 increases and the vapor pressure increases, the pressure inside the hollow chamber 2 may deform and strain the wall and cause it to be destroyed. Similarly, it has the disadvantage that similar problems occur when pressure, load, etc. are applied from the outside. This invention was made to eliminate the drawbacks of the conventional ones as described above, and includes at least a groove formed inside the cylindrical member almost concentrically with the cylindrical member and formed in the longitudinal direction of the outer peripheral wall surface of the cylindrical member. By providing an annular hollow chamber having a protrusion formed in the circumferential direction on either the inner or outer circumferential wall surface and a predetermined amount of working liquid sealed in this hollow chamber, cooling and temperature uniformity are achieved. It is an object of the present invention to provide a heat transfer device that is more effective and can sufficiently withstand internal and external pressures and loads.

Hereinafter, a heat transfer device according to an embodiment of the present invention will be described as a third embodiment.
This will be explained based on the diagram and FIG.

In the figure, a cylindrical member 1, a hollow chamber 2, a working liquid 3, and a vapor 4 are the same as those of the conventional one shown in FIG. 1, so their explanation will be omitted. Reference numerals 5 and 6 denote outer and inner rings constituting the cylindrical member 1, which are formed into a saw body by being press-fitted with a tightening allowance at the position indicated by A in the figure.

7 is a groove formed in the longitudinal direction of the outer peripheral wall of the hollow chamber 2, and 8 is a plurality of protrusions formed in the circumferential direction of the inner peripheral wall of the hollow chamber 2.

Next, the operation of the heat transfer device in one embodiment of the present invention configured as described above will be explained. When heating is performed from the inner ring 6 side as in the conventional device, the working liquid 3 in the hollow chamber 2 is vaporized and becomes vapor 4, which absorbs the latent heat of vaporization and spreads between the protrusions 8 formed on the inner peripheral wall surface. It moves along the groove and accumulates at the top as shown in the figure. This vapor 4 condenses when it comes into contact with the cooler outer ring 5, releasing latent heat of condensation into the surrounding air. Then, the condensed and liquefied working liquid 3 falls downward on the inner surface of the groove 7 by gravity and returns to its original state. By sequentially repeating this operation, the amount of heat on the inner ring 6 side is transferred to the outer ring 5 side, and cooling is performed.
At this time, if the temperature distribution inside is uneven, the amount of evaporation in the high-temperature areas increases, and the amount of heat removed increases, as in the conventional system, and the overall temperature distribution becomes uniform. However, if the temperature distribution is uneven in the circumferential direction,
Such an action occurs in the groove between the protrusions 8 and the temperature distribution is made uniform.If the temperature distribution is uneven in the axial direction, that is, the longitudinal direction, the groove 7 allows the working fluid 3 to smoothly flow in and be replenished. This will promote uniformity of temperature distribution. Similarly, the steam 4 formed in the upper groove 7 is not only cooled by the surrounding air via the outer ring 5, but also utilizes its own steam pressure difference from the higher temperature side to the lower temperature side in the longitudinal direction. The temperature is made uniform by moving, partially condensing, and releasing the latent heat of condensation. On the other hand, the protrusions 8 serve as reinforcement against an increase in vapor pressure due to vaporization of the working liquid 3, preventing deformation and distortion and preventing accidents such as destruction. Moreover, the same effect is exhibited against external pressure and load. Furthermore, since the inner and outer rings 6, 5 are press-fitted with a tightness, it is possible to ensure sufficient strength. still,
In the above embodiment, the protrusion 8 is formed on the inner ring 6, but it may be formed on the outer ring 5 side, or it may be formed on both rings 5 and 6 to achieve the same effect. .

As described above, according to the present invention, a groove is formed inside the cylindrical member substantially concentrically with the cylindrical member and formed in the longitudinal direction of the outer circumferential wall surface, and a circumference of at least one of the inner and outer circumferential wall surfaces. By providing an annular hollow chamber with a protrusion formed in the direction and a predetermined amount of working liquid sealed within this hollow chamber, cooling and temperature uniformity are achieved more effectively, and pressure from the inside and outside is reduced. A heat transfer device that can sufficiently withstand the load can be provided.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the configuration of a conventional heat transfer device, FIG. 2 is a sectional view taken along the line ■-■ in FIG. The cross-sectional view shown in FIG. 4 is a cross-sectional view taken along the line ■--■ in FIG. 3. In the figure, 1 is a cylindrical member, 2 is a hollow chamber, 3 is a working liquid, 4 is steam, 5 is an outer ring, 6 is an inner ring, 7 is a groove, and 8 is a protrusion.

Claims (1)

[Scope of Claims] 1. A groove formed inside the cylindrical member substantially concentrically with the cylindrical member and in the longitudinal direction of the outer peripheral wall thereof, and a groove formed in the circumferential direction of at least one of the inner and outer peripheral wall surfaces of the cylindrical member. 1. A heat transfer device comprising: an annular hollow chamber having a protrusion; and a predetermined amount of working liquid sealed within the hollow chamber. 2. The heat transfer device according to claim 1, wherein the hollow chamber is formed by press-fitting an inner ring and an outer ring with an interference.