JPS6266097A - Thermal syphon device - Google Patents

Abstract

PURPOSE:To avoid the lowering of the heat transport ability, simplify the construction and facilitate the manufacture by sufficiently circulating a working fluid condensed and liquefied back to a heat inlet part. CONSTITUTION:An enclosed pipe 1 is constituted of a metal pipe, and a large number of radiating fins 3 are fitted to a projecting pipe 2 to form a radiating portion 4. In the inner part of the enclosed pipe 1, a non-condensing gas such as air or the like is evacuated, and a condensing working fluid 5 is sealed therein. A spiral pipe 6 communicating at its forward end with the radiating portion 4 is arranged to make contact with the inner peripheral surface of the enclosed pipe 1, whereby a liquid circulating path for circulating the working fluid condensed and liquefied is formed at the radiating portion 4. Since a liquid circulating path for isolating the working fluid 5 of a liquid phase produced at the radiating portion 4 from an uprising liquid of the gaseous phase working fluid and distributing and supplying the same to the entire part of a part where heat is input from the external part, is provided, the liquid phase working fluid can be prevented from being scattering and evaporating. As a result, since it is possible to sufficiently circulate the liquid-phase working fluid 5 back to the part where heat is input, a high heat transport ability can be maintained.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION This invention relates to a thermosiphon device for transporting and transmitting heat from a lower part to an upper part.

Conventional Technology When trying to keep frozen ground frozen by recovering geothermal heat or dissipating heat into the air, it is effective to use a thermosiphon-shaped pipe because the heat is transferred from the bottom to the top. In other words, a thermosiphon heat pipe has a structure in which a liquid-phase working fluid is refluxed by gravity, and has a similar structure to a normal heat pipe except that it does not have a wick that generates a tube pressure. Specifically, a condensable working fluid such as water is sealed in a sealed tube in which a non-condensable gas such as air is evacuated and exhausted, and the lower part serves as the heat input part (heating part), while the upper part serves as the heat input part (heating part). The structure is such that the heat dissipation section (cooling section) is used as the heat dissipation section. Therefore, the working fluid evaporates due to heat input from outside such as geothermal heat, and the vapor flows upward at high speed. flows down to the heat input section.

In thermosyphon heat pipes, as the working fluid circulates in this way, heat is transported as its latent heat, so it transports a large amount of heat extremely efficiently compared to heat transfer through metals such as copper. be able to.

Problems to be Solved by the Invention The condensation and liquefaction of the working fluid in the thermosyphon tube described above is as follows:
This is caused by the vapor of the working fluid coming into contact with the tube wall and removing heat, and therefore the droplets of the working fluid flow down the tube wall to the heat input part, but inside the thermosiphon tube, the vapor of the working fluid Since the liquid is flowing upwardly at high speed, a phenomenon occurs in which the liquid phase working fluid is torn off by steam and transported upward. When such a phenomenon becomes noticeable, the amount of return of the liquid-phase working fluid becomes insufficient and the amount of heat transport decreases, which is known as the scattering limit in ordinary heat pipes. In particular, thermosiphon tubes have a simple structure because they do not have a wick, but on the other hand, they tend to cause splashing of the liquid phase working fluid, and in the case of geothermal recovery, which is an effective application, the heat input section is quite long. Therefore, in combination with evaporation during reflux, the liquid phase working fluid may not be sufficiently refluxed throughout the heat input section, and as a result, there is a possibility that the heat transport capacity will be significantly reduced.

In view of the above-mentioned circumstances, the present invention provides a thermosyphon device that can sufficiently reflux condensed and liquefied working fluid to the heat input section, without the risk of deterioration of heat transport capacity, and that is simple in structure and easy to manufacture. It is intended to provide.

Means for Solving the Problems In order to achieve the above object, the present invention isolates the liquid phase working fluid flow and the working fluid vapor flow, and also distributes the liquid phase working fluid throughout the heat input section. It is configured for distributed provision, and the details are rough.

A non-condensable gas is evacuated into a sealed tube arranged vertically, and then a condensable working fluid is poured into the tube. elaborate
A heat dissipation section for iU liquefaction is provided, and the liquid-phase working fluid flowing down from the heat dissipation section is isolated from the upward flow of the gas-phase working fluid. i [! This device is characterized by providing a liquid return path for distributing and supplying liquid to the entire inner surface of the sealed tube. In addition, in order to simplify the configuration, a heat radiating part is formed at the upper end of the straight sealed tube, and the liquid phase working fluid and the gas phase working fluid are separated within the heat radiating part. It is something that you have.

The working fluid, which has been evaporated by heat input from the outside, becomes an upward flow and flows at high speed inside the sealed tube toward the heat dissipation section.
In addition, the heat dissipation section releases heat to the outside to prevent condensation.
The liquefied working fluid is returned to the entire inner surface of the sealed tube via the liquid return path and is distributed and supplied. Therefore, the liquid-phase working fluid in the middle of reflux hardly comes into contact with the working fluid vapor flow, so there is no scattering of the liquid-phase working fluid, and the length of the liquid reflux path can be set appropriately as necessary. Especially 0,
The liquid phase working fluid is distributed and supplied almost uniformly over the entire inner surface of the sealed tube, and as a result, the condensed and liquefied working fluid is refluxed to a sufficient extent. Furthermore, if a heat dissipation section is formed at the upper end of the straight sealed tube, there is no need to maintain airtightness and install a protruding tube, which simplifies the configuration and facilitates manufacturing.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a schematic cross-sectional view showing a first embodiment of the present invention, and FIG. 2 is a view taken along the N-TT axis. It is composed of a metal tube or a gold II tube whose outer surface has been subjected to anti-corrosion treatment, and a relatively small diameter protrusion v12 is connected to the upper end thereof, and the tip of the protrusion tube 2 is bent downward from a predetermined position. A large number of heat radiating fins 3 are attached to a portion of the protruding tube 2 that is above the part of the protruding tube 2 that is drawn into the sealed tube 1 and faces in the vertical direction. It is said to be part 4. In addition, after evacuating non-condensable gases such as air inside the sealed tube 1, including the inside of the protruding tube 2, a 1-condensable working i-body such as water, ethyl alcohol, or Freon is evacuated. is included. Furthermore, the upper end portion is connected to the heat dissipation portion 4
A spiral tube 6 communicated with is arranged so as to almost touch the inner circumferential surface of the sealed tube 1. This spiral tube 6 forms a liquid return path for returning the working fluid condensed and liquefied in the heat dissipation section 4 to the location where evaporation has occurred, that is, the inner surface of the sealed tube 1. A large number of small holes 7 opening toward the inner surface of the sealed tube 1 are formed. Note that since there is no particular need for heat transfer to take place in the spiral tube 6, a synthetic resin tube can be used for the spiral tube 6. Furthermore, in order to equalize the reflux group of the liquid-phase working fluid to the inner circumferential surface of the sealed tube 1 as much as possible, the opening diameter of the small hole 7 is set so that the opening diameter is smaller toward the upper side and gradually becomes larger toward the lower side. It is preferable to set the value R''>R number of the small hole 7, and it may be determined experimentally according to the inner diameter, length, etc. of the seal v11.

For example, when recovering geothermal heat, the above-mentioned thermosyphon device is arranged with the heat radiating part 4 facing upward and downward, and
The sealed tube 1 is used with most of the portion from the lower end to near the upper end serving as a heat input section. Therefore, inside the sealed tube 1, the working fluid 5 evaporates and vaporizes due to heat input, and the vapor V flows upward at high speed, entering the protruding tube 2 and reaching the heat dissipation section 4. , where it releases heat to the outside and condenses into liquid. The working fluid that has transported heat as latent heat due to a phase change (state change) is condensed and liquefied in the heat radiation section 4 and then flows down by gravity. Since it has been
The liquid phase working fluid flows back through the spiral tube 6. Therefore, the liquid phase working fluid flow is isolated from the gas phase working fluid flow, so that it flows downward without being torn apart by the upward flow of the gas phase working fluid. In addition, the spiral tube 6, which is the liquid return path, is formed with a large number of small holes 7 that open toward the inner circumferential surface of the sealed tube 1, so that the liquid-phase working fluid flowing down inside the spiral tube 6 is prevented from flowing down. It gradually flows out from each small hole 7 and is distributed and supplied to the inner surface of the sealed tube 1. In particular, if the opening diameter of the small hole 7 on the upper side is made smaller and the opening diameter of the small hole 7 on the lower side is set to be larger, the excess liquid phase working fluid that does not flow out through the small hole 7 on the upper side will flow to the lower part. Since the working fluid gradually flows out from the small holes 7 on the side, the working fluid can be circulated uniformly over the entire inner circumferential surface of the sealed tube 1 and can be supplied in one portion.

The f\171 fluid thus refluxed is evaporated again by heat input from the outside, and is used for heat transport.

Therefore, in the above thermosyphon device, the spiral tube 6
By providing this as a liquid return path, the liquid-phase working fluid can be reliably returned to the lower end of the sealed tube 1, which is the human heating section, without causing any scattering during the return.
Furthermore, by forming a large number of small holes 7 in the spiral tube 6, it is possible to distribute and supply the liquid phase working fluid to the entire inner surface of the sealed W1 which becomes the human heating part, and as a result, the above-mentioned thermosiphon device Heat transport can be carried out continuously without reducing the heat transport capacity.

In addition, in the above-mentioned configuration, the spiral tube 6 may be replaced by a porous structural material such as a sintered metal formed in a spiral shape, and in such a configuration, the liquid phase working fluid is extracted from the porous structural material. Let it seep out! I'! ] will be distributed and supplied to the inner surface of the tube 1.

FIG. 3 is a schematic cross-sectional view showing a second embodiment of the present invention, and the thermosyphon device shown here has a liquid return path using a plurality of small diameter pipes 8 instead of the spiral pipe 6 in the above-mentioned embodiment. It was formed. That is, a plurality of small diameter tubes 8 whose upper ends are tied together and whose upper ends communicate with the heat radiation section 4 are inserted and arranged inside the sealed tube 1, and each small diameter tube 8 has a different length. , each lower end is bent toward the inner surface of the sealed tube 1 and opens at different positions in the vertical direction. Therefore, in the configuration shown in FIG. 3, the open end of the small diameter pipe 8 serves as a supply point for the liquid phase working fluid to the inner surface of the sealed pipe 1. However, since there is a restriction on the number of small diameter pipes 8 that can be provided, the above-mentioned When compared with the first embodiment, the number of locations where the liquid-phase working fluid is supplied to the inner surface of the sealed tube 1 is reduced. Therefore, in the configuration shown in FIG. 3, the wick 9 is made of a porous material such as a metal mesh.
It is preferable to add a wick to the inner circumferential surface of the sealed tube 1 to facilitate the supply of the liquid phase working fluid to the entire inner circumferential surface, or it is preferable to provide a thin groove along the circumferential direction instead of the wick 9. .

In addition, as shown in FIG.
In this case, each small-diameter pipe 8
In addition to changing the length, the small-diameter tube 8 may be curved so that the positions of the open ends of the tubes 8 and 8 are different both in the vertical direction and in the circumferential direction of the sealed tube 1. Further, the opening diameter or inner diameter of each small diameter pipe 8 may be varied depending on the vertical position of the opening end, and when a wick 9 made of a roughly metal mesh is provided, the size of the mesh may vary. may be different for the upper and lower parts.

Even in the case of the configuration shown in FIG. 3, the working fluid 5 evaporates due to heat input from the outside, and the vapor V is transferred to the heat radiation section 4.
As the water flows through the water and releases heat, it condenses and liquefies, transporting heat as latent heat. In addition, since the liquefied working fluid flows down from the heat dissipation part 4 through the small diameter pipe 8, it is cut off from the upward flow of the gas phase working fluid, and as a result, it does not scatter upward during the reflux and reaches the evaporation point. It is supplied to the inner surface of the sealed tube 1. Since a plurality of small-diameter pipes 8 are provided and the positions of their opening ends are different, even if the heat input portion has a good length, the liquid phase working fluid can be sufficiently refluxed throughout the pipe. can be distributed and supplied.

FIG. 4 is a schematic cross-sectional view showing a third embodiment of the present invention, and the thermosyphon device shown here has a spiral corrugated tube 10 as a sealed tube, and has gold 81@
A stand-shaped wick 1 made of a porous structural material such as sintered metal E
1 is placed in close contact with the spiral corrugated pipe 10, and the wick 11
By closing the recess 12, the recess 12 becomes a liquid return path, and the heat dissipation part 4 is communicated with the upper end of the recess 12.
The other parts are constructed in the same manner as in the embodiment described above.

Therefore, in the case of the configuration shown in the fourth factor, the steam V of the working fluid generated by heat input from the outside flows into the wick 1.
1 and flows upward on the inner circumferential side thereof, and on the other hand, the liquid phase production fluid generated in the heat dissipation part 4 flows down the spiral recess 12, so that the liquid phase working fluid flow is It is isolated from the upward flow of the gas phase working fluid and can prevent scattering due to the upward flow.

In addition, as shown in FIG. 4, the spiral corrugated pipe 10
The bottle holder is constructed using a wick 11 as a sealed tube and a wick 11 inside it, and the pitch of the cornice and the opening of the wick 11 are adjusted depending on the conditions such as the reflux of the liquid phase working fluid or the heat input. The roughness may be different in the vertical direction - for example, the pitch is narrower on the upper side and the wick 1
The wick 11 may be made coarser, the pitch may be increased on the lower side, and the wick 11 may be made narrower.

FIG. 5 is a schematic cross-sectional view showing a fourth embodiment of the present invention; Furthermore, by providing a plurality of nozzles 14 facing the inner surface of the sealed tube 1 in the middle part of the pipe 13, the pipe 13 is used as a liquid return path, and another configuration is shown in FIG. 3. It was done in the same way.

In this thermosyphon device, eel is grown to constantly fill the pipe 13! ! 8! It is set to produce heat input and radiation that encapsulates the body and maintains its fullness. As a result, the steam in the structure 1tlR is pipe 1
3 as an upward flow, and is condensed and liquefied in the heat dissipation section 4. On the other hand, the working fluid in the liquid phase receives a water head pressure from each nozzle 14 according to its height and reaches the inner surface of the sealed tube 1. injection·! ! disaster. Sealed again! ! On the inner peripheral surface of 1,
The wick 9 distributes the working fluid in liquid phase throughout.

Therefore, even with the configuration shown in Fig. 5, it is possible to separate the liquid-phase working fluid that returns to the heat input section from the upward flow of the gas-phase working fluid, thereby preventing the liquid-phase working fluid from scattering due to the upward flow. Therefore, the liquid phase formed tII'a body can be sufficiently refluxed throughout the heat input section.

In the configuration shown in FIG. 5, since a difference occurs in the water head pressure at the position of each nozzle 14, it is preferable to make the opening diameter of each nozzle 14 different to equalize the outflow of the liquid phase working fluid.

The thermosyphon device shown in FIG. 6 as a fifth embodiment of the present invention is configured to distribute and supply liquid-phase working fluid to the inner circumferential surface of a sealed tube 1 using the energy of the working fluid vapor. It is something.

That is, inside the sealed tube 1, a rotating hollow shaft 15 along its axis is rotatably supported by a bearing 16, and the rotating hollow @15 communicates with the heat radiation part 4 at the upper end, while the lower mgA It is sealed, and turbine blades 17 are attached at multiple locations in the middle thereof to receive rotational force from the steam flow of the working fluid. As shown in FIG. 7, a liquid injection hole 18 for discharging the liquid phase working fluid is provided in the rotary hollow transport 15 slightly above the boss portion 19 to which the turbine blade 17 is fixed. The working fluid is made to flow out from the rotating hollow shaft 15 to the upper surface of the turbine blade 17 through the jet hole 18 .

Therefore, in the thermosiphon device having the configuration shown in FIG. be done. On the other hand, the liquid phase fluid produced by releasing heat in the heat radiating section 4 flows into the rotating hollow shaft 15. Therefore, the liquid phase working fluid flows out from the jet hole 18 to the upper surface of the turbine blade 17, and then flows to the tip of the turbine blade 17 due to the centrifugal force caused by the rotation of the turbine blade 17, and then from there it is sealed. It flies toward the inner surface of tube 1. In the device shown in FIG. 6, the liquid-phase working fluid is isolated from the vapor flow of the working fluid by flowing inside the rotating hollow shaft 15, and is distributed and supplied to the entire inner surface of the closed tube 1 by centrifugal force. Ru.

Note that in the thermosyphon device shown in FIG.

Dispersion of the liquid phase working fluid over the entire inner surface of the sealed tube 1 may be performed by a wick 9 attached to the inner surface of the sealed tube 1, or by natural flow due to gravity. Further, the distribution and supply of the liquid phase working fluid by the turbine blade 17 is achieved by opening a through hole 20 communicating from the inner surface of the boss portion 19 of the turbine blade 17 to the tip of the turbine blade 17, as shown in FIG. 18 may be opened in the through hole 20 thereof, and the liquid phase production fluid flowing back through the rotating hollow shaft 15 may be caused to fly from the tip of the turbine blade 17 through the through hole 20. Furthermore, it may be configured such that only the turbine blades 17 are rotated to exert centrifugal force on the liquid phase working fluid.

Furthermore, FIG. 9 is a schematic *i-plane view showing a sixth embodiment of the present invention, and the thermosyphon device shown here is configured to circulate a liquid phase working fluid stream through an arteriwick 21. It is composed of That is, the wick 21 has a porous structure made of sintered metal or the like, and as shown in FIGS. 9 and 10, it has a flat plate shape as a whole, and a vertical hole 22 is formed in the center of the wick 21 along the longitudinal direction. Furthermore, inside the hole 22, there are a plurality of aperture parts (
Orifices) 23 are provided at predetermined intervals, and the wick 21 is inserted and arranged along the diameter of the sealed tube 1 with both ends in close contact with the inner surface of the sealed tube 1. Roughly, the vertical hole 22 is communicated with the heat dissipation section 4 at its upper end.

Therefore, the thermosyphon 11 shown in FIGS. 9 and 10
Then, the working fluid M generated by heat input from the outside is
The liquid phase working fluid flows upward through the space between the inner surface of the sealed tube 1 and the wick 21, while the liquid phase working fluid generated by the heat dissipation aB4 flows down through the vertical holes 22 of the wick 21. In that case, since the constriction part 23 is formed in the vertical hole 22, the liquid phase flow U flow KLffii9 accumulates in that part temporarily as shown in Figure 9, and as a result, the amount of liquid phase working fluid absorbed by the wick 21 is reduced. It is almost uniform in each part in the longitudinal direction. The working fluid absorbed by the wick 21 reaches the inner surface of the sealed tube 1 and wets it5. Then, it is evaporated again by heat input from the outside. In other words, in the @ position shown in FIGS. 9 and 10, the wick 21 and the vertical hole 22 formed in the center thereof serve as a liquid return path, so that the Y1 phase action S* rest and the vapor flow of the working fluid. is isolated. Note that distribution of the liquid phase working fluid in the circumferential direction of the sealed tube 1 may be performed in-house by attaching a quick to the inner peripheral surface of the sealed tube 1.

In each of the above-mentioned embodiments (ne), the heat dissipation section S4 was constructed by the protruding tube 2, but in this invention, a heat dissipation section is provided in a part of the sealed tube '1. 4 may be formed.An example thereof will be shown below.

First, to explain the configuration shown in FIG. 11, a diaphragm member 24 made of a porous structure material such as a metal mesh is provided at the upper end of the sealed tube 1, and the diaphragm member 24 is directed toward the center. It has a tapered shape that is inclined downward, and its center portion is inserted into the upper end portion of the tubular body 25 that constitutes the liquid return path.

That is, the heat dissipation section 4 shown in FIG. 11 is defined inside the sealed tube 1 by the diaphragm member 24, and a heat dissipation fin 26 is attached to the outer peripheral surface of the portion designated as the heat dissipation section 4. t'Il' immersion vapor that passed through the diaphragm member 24■
is condensed and liquefied on the inner mold surface of the heat radiating part 4, and the liquid phase working fluid is made to flow into the inside of the tubular body 25 via the partition 14v5 material 24.

The heat dissipation section 4 shown in FIG. 12 has a partition wall 28 provided with a ventilation hole 27 in the center horizontally attached to the Ffi section of the sealed tube 1 to partition it, and a heat dissipation fin 29 attached to the upper outer periphery of the sealed tube 1. The ventilation hole 27 is connected to a cylindrical body 30 that guides the working fluid vapor 2 upward, and the partition wall 28 is provided with a cylindrical body 3 that serves as a liquid return path.
1 is installed through it. That is, the heat dissipation section 4 shown in FIG. 12 introduces the working fluid vapor ν from the cylindrical body 30, and also introduces the working fluid vapor ν into the inner wall surface. It! 1 liquefied,
The liquid phase working fluid L8 is configured to flow into the tubular path 31 which is a liquid return path.

The heat dissipation part 4 is shown in FIG. 11 or FIG. 12 (1
If the loop <M i
There is no need to take Δ, the configuration is changed to 14!1iil,
Moreover, it can be easily manufactured.

Effects of the Invention As is clear from the above explanation, the thermosyphon device of the present invention can release P! Since the liquid phase working fluid generated in section 8 is separated from the upward flow of the gas phase working fluid and distributed to the entire part where heat is input from the outside, the liquid phase 1 flow path is provided. Splashing and evaporation of the working fluid can be prevented, and as a result, the liquid-phase working fluid can be sufficiently refluxed to the area where heat is input, so that the heat transport ability can be maintained at a high level. In addition, since the heat dissipation section communicating with the liquid return flow path can be configured as part of the sealed tube, the configuration can be simplified and manufacturing can be facilitated.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view showing a first embodiment of the present invention, FIG. 2 is a view taken along the line ■-■ in FIG. 1, and FIG. 4 is a schematic sectional view showing the third embodiment, FIG. 5 is a schematic sectional view showing the fourth embodiment, FIG. 6 is a schematic sectional view showing the fifth embodiment, and FIG. 7 is a schematic sectional view showing the fifth embodiment. FIG. 8 is a partial view showing another example of a configuration for causing liquid-phase working fluid to fly by centrifugal force; FIG. FIG. 10 is a schematic exploded cross-sectional view showing the sixth embodiment, FIG. 10 is a view taken along the line X--X in FIG. 9, and FIGS. 11 and 12 are partially exploded cross-sectional views showing an example of a heat dissipation section. DESCRIPTION OF SYMBOLS 1... Sealed tube, 4... Heat radiation part, 5... Working fluid, 6... Spiral tube, 7... Small hole, 8...
・Small diameter tube, 10...Spiral Korgu 1-tube, 1
DESCRIPTION OF SYMBOLS 1... Wick, 12... Recessed part, 13... Pipe, 14... Nozzle, 15... Rotating hollow shaft,
17...Turbine blade, 18...ffi!
Hole, 21... Wick, 22... Hole adjustment, 23.
... Throttle part, 24... I device membrane member, 27... Ventilation hole, 28... Partition wall, 30... Cylindrical body, L...
・Liquid phase working fluid, ■...Working fluid vapor.

Claims (9)

[Claims] (1) A non-condensable gas is evacuated into a sealed tube arranged vertically, and then a condensable working fluid is sealed, and a gas-phase working fluid is condensed at the upper end of the sealed tube. A heat dissipation section for liquefaction is provided, and a liquid return path is provided that isolates the liquid-phase working fluid flowing down from the heat dissipation section from the upward flow of the vapor-phase working fluid and distributes it over the entire inner surface of the sealed tube. A thermosiphon device characterized by: (2) The liquid return flow path is constituted by a spiral tube that communicates with the heat radiation section at the upper end and runs along the inner circumferential surface of the sealed tube, and the spiral tube has a spiral tube that extends toward the inner circumferential surface of the sealed tube. 2. The thermosyphon device according to claim 1, further comprising a small hole that opens. (3) The liquid return path is constituted by a plurality of small-diameter tubes whose upper ends communicate with the heat radiating section, and the lower ends of each small-diameter tube are arranged at least at different positions in the vertical direction of the sealed tube in a sealed tube. 2. The thermosyphon device according to claim 1, wherein the thermosyphon device is open toward the inner circumferential surface of the thermosyphon device. (4) The hermetic tube is a spiral corrugated tube, and a straight wick with a porous structure is arranged on the inner peripheral surface of the spiral corrugated tube, so that the recess on the inner peripheral side of the spiral corrugated tube is used as the liquid return path. A thermosyphon device according to claim 1, characterized in that: (5) The liquid return path is constituted by a pipe whose upper end communicates with the heat radiation section and whose lower end is sealed, and the pipe is provided with a plurality of nozzles that open toward the inner peripheral surface of the sealed tube. The thermosyphon device according to claim 1, characterized in that: (6) The liquid return path communicates with the heat radiating part at an upper end, and has a turbine blade on its outer periphery that is arranged substantially along the axis of the sealed tube and receives rotational force from the upward flow of the gas-phase working fluid. A liquid injection hole is formed in the peripheral wall of the hollow shaft where the turbine blade is attached, and the liquid-phase working fluid is pumped from the injection hole to the inner circumference of the sealed tube by the centrifugal force accompanying the rotation. Claim 1, characterized in that the device is configured to be sprayed onto a surface.
Thermosiphon device as described in Section. (7) The liquid return path is constituted by a flat wick with a porous structure, which communicates with the heat dissipation section and has a vertical hole with constricted sections at multiple locations above and below, and whose end surfaces on both sides are in contact with the inner surface of the sealed tube. The thermosiphon device according to claim 1, characterized in that: (8) The upper end of the straight sealed tube serves as the heat radiating section, and a porous membrane member for guiding the liquid-phase working fluid to the liquid return path is arranged so that liquid flows from the inner circumferential surface of the heat radiating section. The thermosyphon device according to claim 1, wherein the thermosyphon device is arranged so as to be inclined downward toward the upper end of the reflux path. (9) By horizontally providing a partition wall having a ventilation hole on the inner circumferential side of the upper end of the straight sealed tube, the heat dissipation section is defined at the upper end of the sealed tube, and the ventilation hole has a partition wall that extends further upward. 2. The thermosyphon device according to claim 1, wherein the liquid return passage passes through the partition wall and communicates with the heat radiation section.