JPS6039653Y2 - heat pipe - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improved structure of a so-called gravity heat pipe that does not use a Lylag.

Heat pipes that do not use Lylag not only have a simple structure, but also have a unidirectional heat transport direction, so when used as a solar heat collector, the heat collected by sunlight does not radiate during rainy days or at night, making it extremely difficult to use. advantageous to

However, such a heat pipe is either tilted as a whole with the condensing part upward, or if installed horizontally, the condensing part 1 is bent into an L-shape and placed at the top as shown in Figure 1. The working fluid must flow down to the heat absorbing section 2 due to the head difference.

However, in order to increase the amount of heat absorbed, a long and narrow pipe is generally used, so the working fluid is evaporated by solar radiation etc. on the way down to the heat absorbing part, and the working fluid is not distributed throughout the long and narrow heat absorbing part, resulting in very poor efficiency. Ta.

This phenomenon was particularly noticeable in the case of horizontal installation as shown in Figure 1.

This invention was made in view of this point, and the second and third sections are as follows.
, To explain Fig. 4, 3 is a long and thin heat absorption tube made of copper or copper alloy, and a wing-shaped heat collecting plate 4 made of the same material or aluminum material is attached to the bottom surface for thermal conduction by fitting or brazing. has been done.

5 is a heat exchanger consisting of inner and outer tubes 6 and 7 arranged coaxially, a flow path 8 for a heat medium liquid such as water in the inner tube 6, and a condensing section 9 between the inner and outer tubes 6 and 7; It is located at a higher location than the heat absorption pipe 3, and the upper part of the condensing part 9 and the heat absorption pipe 3 are communicated with each other by a vapor inlet pipe 10 for the working fluid.

11 exhausts the inside of the heat absorption tube 3 and the condensing section 9 which are connected through an exhaust tip tube attached to the upper part of the heat exchanger 5, and also exhausts acetone,
It is used to inject hydraulic fluid such as water.

Reference numeral 12 denotes a condensate outflow pipe that communicates with the lower part of the condensing section 9, and when it extends along the heat absorption pipe 3, it connects the inside of the eye heat pipe 3 and the plurality of distribution pipes 1.
3 is connected.

The outflow pipe 12 and the distribution pipe 13 are the endothermic pipe 3 and the inflow pipe 1.
The pipe diameter of the distribution pipe 13 is made smaller as it gets closer to the heat exchanger 5.

Reference numeral 14 denotes a bottomed glass tube that encloses the heat absorption tube 3 together with the outflow tube 12 and the heat collecting plate 4. One end opening is sealed with an end plate 15 to create a vacuum inside and prevent heat radiation from the heat absorption tube 3. be.

The heat absorption pipe 3 and the outflow pipe 12 pass through the end plate 15 and are supported.

Next, to explain the operation, the heat collecting plate 4 is heated by solar radiation transmitted through the glass tube 14, and as a result, the working fluid present in the heat absorption tube 3 evaporates, and the working fluid passes through the steam inlet tube 10 and enters the heat exchanger 5. The working fluid enters the condensing section 9 and is condensed and liquefied by the heat transfer fluid flowing through the flow path 8 for the heat transfer fluid.

That is, the condensed liquid 16 flows into the outflow pipe 12 and is uniformly returned to the heat absorption pipe 3 through the plurality of distribution pipes 13 .

Since the outflow tube 12 is a thin tube, a small amount of the condensate always remains in the condensing section, so it does not reflux discontinuously, but is refluxed continuously due to the head difference with the endothermic tube 3 of the heat exchanger 5. Also, since the pipe diameter of the distribution pipe 13 is taken into account, S can be uniformly recirculated throughout the long and thin endothermic pipe 3.

Furthermore, since the distribution pipe 13 and the outflow pipe 12 are not in direct contact with the heat collecting plate 4, the working fluid does not evaporate on the way.

The working fluid returned to the heat absorption tube 3 evaporates again, but the condensed liquid (
Since the outflow pipe 12 and the distribution pipe 13 are clogged with working fluid (working fluid), and the pressure of the head difference of the heat exchanger 5 is applied to the distribution pipe, steam does not enter the distribution pipe 13 and flows from the inflow pipe 10 to the heat exchanger. It falls into the 5th category.

As described above, the present invention provides communication between one end of the elongated heat absorption pipe and the upper part of the heat exchanger located at a higher place than the heat absorption pipe through the steam inflow pipe, and the outflow pipe and the heat absorption pipe that communicate with the lower part of the heat exchanger. Since the two are connected through multiple distribution pipes, the working fluid condensed in the heat exchanger can be uniformly refluxed over the entire area of the endothermic tubes, and as a result, the entire endothermic tube operates, improving heat transport efficiency. Moreover, it is effective to operate even if the heat absorption pipe is installed horizontally.

[Brief explanation of the drawing]

FIG. 1 is an end view of a conventional heat pipe, FIG. 2 is an end view of the main parts of the heat pipe of the present invention, FIG. 3 is a perspective view, and FIG. 4 is an enlarged sectional view of the main parts. 3... Endothermic pipe, 10... Inflow pipe, 12
... Outflow pipe, 5 ... Heat exchanger, 13.
...Distribution pipe.

Claims (1)

[Scope of utility model registration request] A steam inflow pipe communicates between one end of the elongated endothermic pipe and the upper part of the heat exchanger located higher than the heat exchanger, and a condensate outflow pipe and the endothermic pipe communicate with the lower part of the heat exchanger. A heat pipe that is connected by multiple distribution pipes in between.