JPH0356721Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a capillary pump.

[Prior Art] Generally, a capillary pump is used to heat a liquid using various types of waste heat such as exhaust gas and transfer it as vapor.

As shown in FIG. 5, current capillary pumps have a liquid flow path 2 and a vapor flow path 3 connected to a heated fluid circulation system each equipped with a condenser (not shown) at both ends of a hollow cylindrical shell 1. At the same time, an inner tube 4 made of a porous material is inserted into the shell 1 concentrically with the shell 1, one end of the inner tube 4 is connected to the steam flow path 3, and the other end is open. In some cases, a partition wall 5 is fixed to the shell 1, and the inside of the shell 1 is divided so that the outside of the inner tube 4 becomes a liquid permeation section 6 and the inside of the inner tube 4 becomes a steam generation section 7. A flow path for a heating medium 8 such as exhaust gas is formed outside the shell 1, and the liquid 9 as a heated fluid that has flowed from the liquid flow path 2 into the liquid permeation part 6 in the shell 1 is heated. It is heated by the medium 8 and penetrates into the wall of the porous inner tube 4 due to its surface tension.
The steam 10 flows into the steam generating section 7 inside the steam passageway 3 and flows into the fluid circulation system (not shown) through the steam flow path 3.

In this way, by heating the fluid to be heated with the heating medium 8, the fluid to be heated can be transferred without using any special power.

[Problems to be solved by the invention] However, in the capillary pump as described above, the liquid permeation part 6 for the fluid to be heated is formed outside the inner tube 4, and the flow path for the heating medium 8 is formed outside the shell 1. Therefore, the liquid 9 is directly heated by the heating medium 8 and bubbles are generated in the liquid 9. As a result, the liquid 9 is inhibited from penetrating into the wall of the inner tube 4 made of the porous material, and the transfer efficiency is reduced. It was declining.

Further, although the temperature gradient of the inner tube 4 decreases toward the center of the axis in the radial direction, the direction in which the liquid 9 permeates into the wall of the inner tube 4 also points toward the center of the axis, resulting in a problem of poor heat transfer efficiency.

In view of these circumstances, the present invention aims to provide a capillary pump that can prevent a decrease in transfer efficiency and has high heat transfer efficiency.

[Means for solving the problem] The present invention divides the inside of the shell into a liquid permeation part and a steam generation part using a porous material, and connects the liquid permeation part and the steam generation part to a heated fluid circulation system, respectively. The liquid flow path and the vapor flow path are connected, a heating medium flow path is formed on the steam generation part side, and a heat transfer plate is provided between the heating medium flow path and the porous material. have

[Function] The liquid that has flowed into the liquid permeation part in the shell from the liquid flow path permeates the porous material, and the liquid that has permeated the porous material is heated by flowing through the heating medium flow path formed on the steam generation part side. It is heated by the medium through the heat transfer plate and flows out as steam to the steam generation section, and the steam is further superheated by the superheating medium and flows from the steam flow path to the heated fluid circulation system. .

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

Note that in FIGS. 1 to 4, the same reference numerals as in FIG. 5 indicate the same parts.

As shown in FIGS. 1 and 2, a liquid flow path 2 is connected to one end of the shell 1 so as to communicate with the inner pipe 4, and a vapor flow path 3 is connected to the other end of the shell 1. A liquid permeable part 6 is formed inside by the inner pipe 4;
The outside is divided into a steam generating section 7, and the inner tube 4 is provided with a heat transfer plate 1 extending from the inner wall of the inner tube 4 to the inner wall of the shell 1.
1 are provided radially.

With the configuration as described above, the liquid 9 flowing from the liquid flow path 2 into the liquid permeation part 6 inside the inner tube 4 penetrates the wall of the inner tube 4 due to its surface tension, and at the same time absorbs the heat of the heating medium 8 outside the shell 1. is absorbed through the heat exchanger plate 11 and flows out as steam 10 to the steam generating section 7 outside the inner tube 4, and the steam 10 is further absorbed by the heating medium 8.
The steam is heated by the steam flow path 3 and flows into a fluid circulation system (not shown).

That is, since the liquid 9 is not directly heated by the heating medium 8 and the heating temperature on the steam 10 side becomes high, bubbles are not generated in the liquid 9 in the liquid permeation part 6, and the inside of the liquid 9 is not heated. Penetration into the wall of tube 4 is also not inhibited.

Moreover, since the liquid 9 permeates toward the outer circumferential direction of the inner tube 4 where the temperature gradient becomes higher, the heat transfer efficiency is improved and the generated steam is easily overheated.

3 and 4 show another embodiment of the present invention, in which the conventional capillary pump shown in FIG. A flow path 12 for a heating medium 8 is provided in the inner tube 4 concentrically with the inner tube 4, and a heat transfer plate 11 is provided on the outer peripheral surface of the flow path 12 in a radial manner, reaching the outer wall of the inner tube 4 from the outer peripheral surface of the flow path 12. Provided for.

As a result, the liquid 9 flowing from the liquid flow path 2 into the liquid permeation part 6 in the shell 1 permeates the wall of the inner tube 4 from the outside of the inner tube 4 and flows through the flow path 12 penetrating the inside of the inner tube 4. Heat exchanger plate 1 by heating medium 8
1 and flows out as steam 10 into the steam generating section 7 located between the inner tube 4 and the flow path 12, and the steam 10 is further heated by the heating medium 8 flowing in the opposite direction. It flows from the steam passage 3 to a fluid circulation system (not shown) while being superheated.

In this other embodiment, as in the previous embodiment, no air bubbles are generated in the liquid 9, and furthermore, since the flow path 12 through which the heating medium 8 flows is not exposed to the outside, the heating medium is heated by heat radiation. 8 heat loss can be reduced,
It becomes possible to further increase heat transfer efficiency, and the efficiency of steam superheating also improves.

It should be noted that the present invention is not limited to the above-described embodiment, and instead of the inner tube 4, a flat porous material may be used to divide the inside of the shell 1 into a liquid permeation section and a steam generation section. Of course, various changes may be made without departing from the gist of the present invention.

[Effects of the invention] As described above, according to the invention, a heating medium flow path is formed on the steam generation part side of the shell, and the heating medium flow path and the inside of the shell are divided into a liquid permeation part and a steam generation part. Since the liquid is connected to the porous material by a heat transfer plate, the liquid is not directly heated by the heating medium in the liquid permeation part, and the heating temperature on the steam generation part side becomes high. The generation of air bubbles is suppressed, the liquid permeates smoothly into the porous material, and a decrease in the transfer efficiency of the heated fluid can be prevented. Moreover, the liquid permeates into the porous material in the direction of increasing temperature gradient, that is, the liquid permeates into the porous material smoothly. Because it moves toward the steam generation side, heat transfer efficiency also improves,
Furthermore, excellent effects such as easy overheating of the generated steam can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing one embodiment of the present invention, FIG. 2 is a view taken along the - arrow in FIG. 1, FIG. 3 is a side sectional view showing another embodiment of the present invention, and FIG. FIG. 3 is a view taken along the - arrow, and FIG. 5 is a side sectional view showing a conventional example. 1 is a shell, 2 is a liquid flow path, 3 is a vapor flow path, 4
1 is an inner tube, 6 is a liquid permeation part, 7 is a steam generation part, 8 is a heating medium, 9 is a liquid, 10 is steam, 11 is a heat exchanger plate, and 12 is a flow path.

Claims (1)

[Scope of utility model registration request] The inside of the shell is divided into a liquid permeation part and a vapor generation part by a porous material, and a liquid flow path and a vapor flow path connected to the heated fluid circulation system are connected to the liquid permeation part and the steam generation part, respectively. A capillary pump characterized in that a heating medium flow path is formed on the side of the steam generation section, and a heat exchanger plate is provided to extend between the heating medium flow path and the porous material.