JPS62252892A - Meandering loop shaped heat pipe - Google Patents

Abstract

PURPOSE:To obtain a high-density stage row arrangement structure using extremely thin heat pipes by circulating a working liquid while repeating alternately evaporation and condensation, causing an evaporating part and a condensing part to act as a single heat pipe, and forming as a whole a series connected body of a large number of heat pipes, and arranging respective heat pipes at predetermined positions and predetermined postures by predetermined shape meandering. CONSTITUTION:A working liquid circulating in one direction circulates by alternately repeating evaporation and condensation. The combination of a set of an evaporating part and a condensing part acts as one heat pipe. The entire meandering part of the heat pipe is a series connect body of a large number of heat pipes, and respective heat pipes are arranged at predetermined positions and predetermined postures by the meandering arrangement of a long tube container. In the case of heating a body 11 to be controlled of its temperature, containers 1-2 and 1-3 are heated by heating means 12-1 and 12-2, and held at a temperature higher than that of a straight tube container 1-1. In the case of cooling the body 4 to be controlled of its temperature, the containers 1-2 and 1-3 are cooled by cooling means 12-1 and 12-2 and held at a temperature lower than that of the straight tube container 1-1.

Description

[Detailed description of the invention] A0 Purpose of the invention Industrial applications The present invention relates to the structure of a loop-shaped heat pipe.

In particular, the present invention relates to a novel structure of a loop heat pipe that provides a substantially aligned structure of a large number of heat pipes in a loop container consisting of a single elongated tube. Furthermore, the present invention relates to a loop-shaped heat pipe stand which provides a high-density array structure of substantially a large number of ultra-fine heat pipes using a loop-shaped container made of one ultra-fine elongated tube.

2. Description of the Related Art When uniformly heating and cooling a flat object to be cooled, a flat object to be heated, a laminate thereof, etc., it is effective to make effective use of a group of heat pipes.

In that case, a structure in which a large number of heat pipes are arranged in a predetermined row, or a flat plate-like arrangement structure of heat pipes as a unit constituting the structure is required. V
When heating a fuel cell stack during startup and cooling after startup using the heat equalizing properties of heat pipes, the thickness of the unit cell is about 6 to 12 mm, and in the future it will be about 4H. The area of one cell is 600 tm
It is thought to be about 600 mm, so the outer diameter is 2 to 3 f.
1 per cell of ultra-fine heat pipe with a length of 600m5+
It is necessary to arrange 0 to 30 columns in a flat plate shape. Moreover, the number of laminated cells per stack reaches several hundred or more. Therefore, the height direction arrangement of the ultra-fine heat pipe array is 4 to 12 m.
It is necessary to have a high-density arrangement with a pitch of several hundred stages. Currently, a tiered structure of ultra-thin water tubes is used for this cooling, but higher performance is expected from the viewpoints of rapid thermal response, good heat uniformity, and high reliability. Therefore, the application of heat pipes is strongly desired.

The thirteenth factor is shown in FIG. 14, which shows a conventional heat pipe alignment structure 151. Fig. 13 shows the case for both heat dissipation and heat reception, and Fig. 14 shows the case for heat reception (or heat dissipation) only.

In Fig. 13, (IJ is a heat pipe row, (2) is a heating header (3) is a cooling header, and broken line (5) is a heated (cooled) flat plate. As shown in Fig. 0, there are many heat pipe groups. are connected by headers (1) and (2) and the whole acts as an integrated heat pipe, so the flat plate (5) acts as a heat pipe to equalize heat both in the length direction of the heat pipe and between each unit heat pipe. Action works. Flat plate (5)
When performing t-heating, the heating header (2) located at a low position is fully heated, and when performing cooling, the high position header (3) is fully cooled, thereby effectively preventing top heating.

In Fig. 14, (1-1) is the heat receiving part of the heat pipe;
(1-2) is the heat dissipation part of the heat pipe, (4-U is the cooling pipe, and (4-2) is the refrigerant liquid. (6) is the heat generating flat plate, and the heat is absorbed by the heat pipe array. -1) In the heat pipe row shown in Fig. 14, each heat pipe is independent, so there is no heat equalization effect between the heat pipes. had the following problems: (When each AI heat pipe is in a horizontal position, the performance drops significantly. This is due to the reduction in the reflux speed of the working fluid, and the performance of all conventional heat pipes decreases.) Therefore, in the case of cooling mode and heating mode, it is necessary to change the heat receiving position and heat dissipating position so that bottom heat is always achieved.

(Since the diameter of the Bl header or cooling pipe is large, when stacking the row planes to form steps, the crotch pitch is limited depending on the diameter of the header or cooling pipe, so it is difficult to configure a high-density step row alignment structure. (C) There are many welding or mounting points, and especially in the case of the aforementioned fuel cell stack, there are thousands of welding points, which significantly reduces reliability and increases manufacturing costs. (Uniformity - Due to the principle of heat pipes, in which the working fluid and working fluid vapor circulate inside the container while coming into contact with each other in opposite directions, it is difficult to make them extremely thin, and performance deteriorates significantly when the outer diameter is less than 4 mm.Recently, internal Artery tubes for working fluid return and ultra-thin heat pipes with wire insertions have also been manufactured, but these insertions inevitably reduce performance due to the reduction in internal volume.

Figures 15 and 16 are loop-shaped (or separate)
In Figure 0, which shows the arrangement structure of heat pipes, (1-1) is the heat dissipation section row (1-2) of heat pipes.
) is a row of heat receiving parts of a heat pipe.

(7) is a working fluid reflux pipe, and (8) is a steam reflux pipe. (
9) is a pump for forced reflux of the working fluid. Since the loop heat pipe has separate wave paths for the working fluid and steam, they do not interfere with each other within the heat pipe container. Therefore, it is possible to reduce the diameter of the heat pipe and to arrange it with high density. In addition, forced reflux of the working fluid is possible and top heating is also possible, so it can be used in both heating and cooling modes. In this way, although the loop shape and the one-doped pipe solve some of the problems in the example of factor 13 in FIG. (E) Even if ?t6 density arrangement is possible on the heated (cooled) flat plate surface, it is necessary to provide another cooling section (heating section) t-, which increases the overall size. There are many cases where it is not abused. (
F') In the heat receiving and dissipating sections of meandering tubes (or spiral tubes) such as the rows of heat pipes shown in Figure 4, as the length increases, the fluid resistance of the inner wall of the container increases and the performance decreases, so the number of rows of straight tubes should be reduced. I can't do much.

Problems to be Solved by the Invention The present invention solves all the problems of (Al-(F')) in the conventional heat pipe tiered structure as described above, and provides a low-cost, high-performance structure. It is an object of the present invention to provide a heat pipe alignment structure and a high-density tier arrangement structure using ultrafine heat pipes.

Means for Solving the Constituent Problems of the Invention Figures 1 to 7 are schematic diagrams showing the principle of the meandering loop heat pipe according to the present invention, which is a means for solving the problems. The first and second factors show an example in which straight pipe containers are arranged in one row, which is the most basic structure, (
1) is a meandering long pipe container, which includes a group of straight pipe containers (1-1) arranged in one row and a U-shaped bent pipe that connects the straight pipe containers in a vertical plane and makes them meander.
-2) and (1-3).

The valley straight pipe container (1-1) is held substantially horizontally.

Both ends (1-8) and (1-7) of the meandering long pipe container are arranged at the top and bottom of the row of stages, respectively, and the connecting pipe container (
2) A loop-shaped container is formed by airtightly connecting both ends of the upper f (4-21) and (4-23). The broken line αυ indicates the temperature-controlled body. The broken line (12-1)
, (12-2) indicates a heating means (or cooling means),
The temperature-controlled body υ is in close contact with the straight pipe container group (1-1). Container containing U-shaped pipe (1-2), (1
-3) and the straight pipe container (1-1) are provided with a relative temperature difference, and when heating the temperature controlled body αυ, the containers (1-2) and (1-3) are used as heating means. (12-1)
, straight pipe container (1-
1) It is held at a higher temperature. Also, when cooling the temperature controlled body αυ, use the container (1-2).

(1-3) are cooling means (12-1), (12-2)
and is kept at a lower temperature than the straight pipe container (1-1). In a meandering loop-shaped heat pipe in which a working fluid circulates in the same direction by a predetermined means, a meandering long pipe container is maintained at a relatively high temperature at a number of predetermined points compared to other parts. The remaining part is kept at a relatively low temperature, and the working fluid that circulates in one direction circulates while repeating evaporation and condensation alternately. It acts as a single heat pipe, and the entire meandering section of the heat pipe is essentially a serial connection of a large number of heat pipes, each of which is held in place by the meandering of the long tube container. A structure arranged in a predetermined position is a means for solving the problems according to the invention. The structure of FIGS. 1 and 2 as described above satisfies this means. Fig. 1 shows a row in which the heating means (or cooling means) is provided on both sides of the meandering part of the long tube container, and Fig. 2 shows a row in which it is provided only on one side. Although the container group is arranged in a single row and multi-tiered arrangement, the basic method is not limited to this arrangement.Therefore, a multi-row and multi-tiered arrangement may be used, and the meandering shape may be any shape including a spiral shape. Also pulled.

Effects The means for solving the problem constructed as described above has the following effects.

(AI) Since the hydraulic fluid and its vapor are forcibly circulated in the same direction within the loop-shaped container by a predetermined means, the circulation speed does not change depending on the posture. Even so, the heat pipe works reliably.

(fl) Since the heat pipes each consisting of a set of an evaporating section and a condensing section are connected in series, there is no need for a header or a common cooling section. Meandering straight pipe containers can be constructed without connections, and if connections are required, only a slight increase in diameter is required. A slight increase in diameter of the connecting pipe container that connects both ends of the container is sufficient. Therefore, when the plane formed by a group of heat pipes is a horizontal plane, whether it is stacked to form a stage or vertical plane is entirely stacked to form a row, headers, common cooling pipes, connecting pipes, etc. will get in the way. Therefore, it is easy to configure heat pipes as a highly densely arranged structure in rows of stages.

(C) Since the alignment structure is composed of meandering long tube containers, there are very few connection points, so there is little decrease in reliability and the manufacturing cost is low.

fDJ Since the flow of the working fluid and the flow of the working fluid vapor are in the same direction and do not interfere with each other, it is possible to reduce the diameter of the heat pipe, making it possible to manufacture ultra-thin heat pipes with an inner diameter of 1 u or less and an outer diameter of 2 u or less. becomes.

(E) Different from a normal loop-shaped (separate type) heat pipe, only a connecting pipe container is added for the circulation of the working fluid, and the evaporator section and #clamp section are alternately connected to each other and are separated for cooling. (or heating) The structure as a whole does not need to be enlarged.

(Short) In the meandering long tube container according to the present invention, each set of evaporating section and condensing section acts as one heat pipe, and the entire long tube is formed as one continuous heat pipe. In contrast, the pressure drop of the working fluid vapor does not accumulate and it only needs to move to the adjacent condensing section, and the condensed working fluid also moves to the adjacent evaporating section and acts as a heat pipe, so the stage arrangement is possible. No matter how long the meandering long tube container is, the performance of the heat pipe will not deteriorate even if there are a large number of heat pipes. The heat pipes move reliably due to the pressure difference between the connecting pipe and the vapor pressure inside the container, and this movement allows the evaporator to receive and evaporate the working fluid from the previous condensing section.In this way, the heat pipes in each stage row are will continue to operate reliably.

The movement of hydraulic fluid and hydraulic fluid vapor is mainly due to the effect of one vapor pressure difference, but in the case of a vertical plate arrangement, the siphon effect of the hydraulic fluid between each stage also has an auxiliary effect on the movement of hydraulic fluid and vapor. There is.

The means for solving the problems related to the present invention as described above is based on the problems that occur when relying on the prior art (AJ~(FJ terms) respectively corresponding actions (AJ~(FJ terms) can be solved by

The basic structure and operation of the means for solving the problem of actual 2711iC are as described above, but in order to implement it practically and ensure that the prescribed function is achieved, additional means of each type are required. It needs to be attached.

In the first embodiment, FIGS. 1 and 2, the connecting pipe container (2-1)
U-shaped bent pipes (2-2) and (2-3) are provided at both upper and lower ends of the U-shaped bent pipe (2-2), and one half (2-4) of the U-shaped bent pipe (2-2)
and (2-3) are hydraulic fluid reservoirs, which are structured to smoothly replenish the meandering long pipe container with hydraulic fluid. The hydraulic fluid reservoirs are containers (1-1) and (1-2).
) and (1-3), it has the role of supplying working fluid in response to fluctuations in the amount of heat received and the amount of heat released in a certain heat pipe group. Among these two hydraulic fluid reservoirs, the soldier's fluid reservoir (2-4) is an essential condition for smooth hydraulic fluid replenishment. In order to fully demonstrate the function of this working fluid # (2-1), the working fluid that is continuously discharged from the heat pipe group is continuously pumped up into the lower reservoir (2-3) and the upper reservoir (2-4) It is necessary to provide a means for maintaining the water level above a certain level.This means can be implemented by conventional techniques implemented with various loop-shaped heat pipes.

Since the meandering loop heat pipe according to the present invention is a series connection of a single heat pipe, the working fluid discharged from the heat pipe in the upper row directly flows into the heat pipe in the lower row. Since it is used to operate the pipe, the amount of working fluid that must be replenished per unit time can be extremely small, which is an advantage of the extremely thick serpentine loop heat pipe according to the present invention. Heat pipes (1-1) and (1-2) are connected in parallel between the headers shown in Fig. 15, which are most commonly used in conventional loop-shaped (separate type) heat pipes. In the heat dissipation section, as the number of tubes arranged in a row increases, the amount of hydraulic fluid that must be replenished per unit time increases, to the extent that a pump is required as a means for pumping up the hydraulic fluid. However, no matter how large the amount of heat received and radiated by the meandering loop heat pipe according to the present invention,
No matter how many rows of heat pipes there are, the amount of working fluid that must be replenished is sufficient to operate one heat pipe. In FIGS. 1N and 2, the connecting pipe container (2-1) is operated as a single heat pipe as a means for pumping up the hydraulic fluid.

This method uses the upper liquid reservoir (2-
4) may be maintained at a relatively lower temperature than the lower liquid reservoir (2-3). Therefore, a cooling means (13-1) is provided to stably store the liquid in each liquid reservoir.

(13-2) is the upper cooling means (13-1) t-
(13-2) By lowering the temperature, the liquid reservoir (2-4)
is lower than (2-3), and the working fluid vapor is always at (2-3).
At 43, a large amount of # shrinkage occurs. In the figure, in order to activate the evaporation of the working fluid in the lower part, a wick partially immersed in the lower working fluid reservoir (2-3) is installed in a part of the connecting pipe container (2-1), and a wick is installed from outside the pipe. Means (2-5) for heating the area is provided with an attached working fluid evaporation section. With this configuration, it becomes possible to easily control the hydraulic fluid tr condensed in the liquid reservoir (2-4). An enlarged sectional view thereof is shown in FIG. - at (1-
7) is the lower end of the meandering long pipe (2-3) is the lower U-shaped pipe of the connecting pipe container, (4-2) is the connecting part thereof, (2-3) is the lower U-shaped pipe of the connecting pipe container,
-8) is a wick. The wick (2-6) is partially immersed in the working fluid (2-7) in the U-shaped pipe (2-3). (2-5) is a heat source for steam generation.

Although FIGS. 1 and 2 of the third embodiment illustrate a single row multi-stage heat pipe arrangement, the meandering loop heat pipe according to the present invention is not limited to a single row structure. If the movement of the steam is carried out only by the action of the steam, it will be difficult to create multiple rows, but in the case of the structure according to the present invention, the pressure difference of the hydraulic fluid vapor generated between the rows is the main means of movement. Therefore, it is easy to create multiple rows on a horizontal plane with no water level difference. FIG. 5 is a schematic front view of the case of three rows and multiple stages, and the sixth factor is a schematic plan view thereof. In this case, the first prisoner and the second vertical U-shaped pipe (1-2).

(1-3) as well as horizontal U-shaped pipes (1-4), (1-
5) are also combined and arranged in three rows and multiple stages. In addition, in the case of this multi-row arrangement, it is not necessarily necessary to use a basic arrangement, but a staggered arrangement may be used.

In the fourth row and fifth row, the U-shaped pipes (1-23, (1-3)) connecting the straight pipe containers of the adjacent upper and lower stages are in a vertical position.Bending of the U-shaped pipes When the radius is large, the distance between the stages becomes large in this various arrangement, and the stages 'Ii are densely arranged.
? It may not be possible to configure. In such a case, by forming the U-shaped bent tubes (1-27, (1-3) in an inclined position, the distance between the legs can be reduced and the structure can be constructed with high density.In this case, the overall structure becomes a zigzag arrangement.

Fig. 7 shows a meandering loop shape in which the U-shaped pipe containers (1-2) and (1-3) of the inter-stage connecting portions are formed in an inclined posture in a single-row multi-stage arrangement, and the entire structure is configured in a zigzag state. It is a front schematic view of a heat pipe.

In the figure, a 10-stage arrangement is possible at the same height as the 6-stage arrangement of the 6th factor.

The fifth row of loop-shaped heat pipes requires means for regulating the flow direction of the working fluid and steam to one direction. In the conventional system, reverse valves, forced circulation pumps, etc. are often used.In the case of the meandering loop heat pipe according to the present invention, the upper end (1-6) and the lower end (1-7) of the meandering long pipe container are used. Since the purpose can be achieved by creating a slight pressure difference between the traps, it can be carried out by extremely simple means.
The upper end of the meandering long pipe container (1
-6) and the upper end of the connecting pipe container (or the tip of the working fluid reservoir)
A high-density wick (3) is filled in the vicinity of the connection part (4-1) with (2-4). This filling wick (3) has the role of preventing the hydraulic fluid from flowing out of the hydraulic fluid reservoir and storing the fluid in the hydraulic fluid reservoir. It also has the role of supplying the tubular containers. An even more important role is to resist and stop the vapor pressure of the hydraulic fluid, thereby acting as a check valve to prevent the vapor pressure from causing the hydraulic fluid in the hydraulic fluid reservoir to flow backwards. The lower end (1-7) of the meandering long pipe container is open, and the inside of the connecting pipe container is relatively low temperature and low pressure, but the presence of the filling wick allows the working fluid and its vapor to flow toward the bottom floor. Role of regulating the flow direction 1 & : Exercising 1
(2-7) in the g4 diagram is the hydraulic fluid. Also (1-4
) is a fine metal tube to assist in supplying working fluid from the filling wick (3).

Inner diameter 1 甽 and 4 blades Evaporation section length 600fi Condensation section length 6
The thermal resistance values of a heat pipe with a 00u tube thickness α6111 are calculated to be 0.18℃/W for #1 and α045℃/W, respectively.
The position is estimated. In this case, when the difference in position between the heat receiving and dissipating parts is 50°C, the maximum heat transport amount of the heat pipes is approximately 240°C.
It is estimated to be 1'd/lF8, 961j/hour. The average operating temperature of these heat pipes is 150℃,
evaporation.

If the latent heat of condensation is 503 &j/kf, the amount of water to be evaporated or ammed in the heat pipe is approximately 8
ce/min, 32 cc/min6 The inventor experimentally installed a pressure cuff in a thin tube with an inner diameter of 1 fi and a length of 600 fl kg/cyf.
It has been obtained that the flow rate of water when water is passed through is approximately 22 plates/min.

Therefore, it can be clearly seen how small pressure is sufficient to be applied to the working fluid supplied to the heat pipe. Furthermore, as mentioned above, no matter how many such heat pipes are arranged according to the structure according to the present invention, since they are arranged in series, the operation to be supplied from the upper end of the meandering long container is The liquid volume is 1 inch or more for each heat pipe.
4m, length 1200m only 8ce/min~
32cc/min, 1Qce/min ~ 40 cc even if you look at the margin
It turns out that 7 minutes is sufficient, and it turns out that this level of flow rate can be obtained with an extremely low pressure difference. Therefore, it can be assumed that the filling quick shown in FIGS. 1, 2, and 4 does not require a very special wick, and that it is sufficient to completely fill one ordinary pipe wink.

Sixth implementation example In the meandering loop-shaped heat pipe according to the present invention, when the diameter of the meandering long tube container is relatively large, the internal fluid resistance is small, so the working fluid flows down from the heat pipe in the upper stage row at a high speed or at a low flow rate. is large.

The working fluid may be supplied to the lower stage heat pipes at an evaporation rate of seven or more, resulting in a decrease in performance. In addition, if you increase the heat tV applied to the evaporation section of the connecting pipe container or strengthen the cooling of the upper liquid reservoir in order to compensate for this or reduce the working fluid tt in the lower liquid reservoir, there will be a large energy loss. Become. As a countermeasure against this, the designated straight pipe container is
A flow rate limiting means or a flow rate limiting means is installed at a predetermined position of a meandering long pipe container, such as a structure in which quick is layered in a predetermined U-shaped pipe container, or a coarse wick is filled in a predetermined U-shaped pipe. It is necessary to provide

In each of the embodiments described above, the straight pipe containers are all held substantially horizontally. However, this is to take advantage of the easy movement of the working fluid due to gravity, and the movement of the working fluid and its vapor in the meandering loop heat pipe according to the present invention is based on the vapor pressure between both ends of the meandering long pipe container. Basically, it is carried out based on differential pressure, and 1! Movement by force is only an aid. Therefore, if a slight deterioration in performance is not a problem, each implementation u can be performed regardless of the orientation of the straight pipe container. Depending on the structural requirements of the equipment to be applied, the straight pipe container group may be in an inclined or vertical position, and in these cases, the hydraulic fluid pumping action of the connected containers is dependent on the container. It works effectively even if you are in a horizontal position or in a top heat state. This is due to the movement of the hydraulic fluid and its vapor in the same direction.

No. 1 Effect of the Invention The first effect of the meandering loop heat pipe according to the present invention is that it is extremely easy to construct a high-density heat pipe assembly. By stacking a large number of flat heat pipe plates as shown in FIG. 1 or 2, an integrated structure with hundreds or thousands of heat pipes can be easily obtained. The second effect of the present invention is that the vapor pressure of the hydraulic fluid is used to move the hydraulic fluid and its vapor, and because the flow direction is constant, it is possible to increase the outer diameter of one blade, which was previously impossible. The advantage is that ultra-thin heat pipes of ~2 sm or less can be easily manufactured. The ability to easily construct such a high-density assembly of ultra-thin heat pipes is an extremely important effect, expanding the range of applications for heat pipes and making coolers more compact.

It can make a major contribution to improving performance. In particular, a heat pipe with a small outer diameter has an extremely high convection heat transfer coefficient on its surface compared to a conventional heat pipe, and therefore, its assembly does not require radiation fins, and provides a miniaturized heat exchanger. I can do it. Ambient installation 20℃ tube surface temperature 6
The heat transfer coefficient between the air and the tiered structure of heat pipes with an outer diameter of 1 m at a wind speed of 3 m/a at 0°C is 150 r/r1. h
, °C, which corresponds to five times as many heat pipe stages with an outer diameter of 25 mm.

Also, the heat transfer coefficient for water with a flow rate of 1 m/a is 2600
0 de/m, h, °C, which is equivalent to 45 times that of a heat pipe with an outer diameter of 25III. Also, the natural convection heat transfer coefficient of air under similar conditions is 26'&i/wt'', h, °C
This is about four times the heat transfer rate of a heat pipe with a diameter of 25 mm. Because of this, the heat receiving and discharging section of the heat exchanger configured by a group of ultra-fine heat pipes can exhibit the same performance even if it is configured without mounting metal fins. When the fins can be omitted, the heat exchange section has advantages such as extremely easy maintenance and cleaning, and the volume of the heat exchange section can be reduced.

8-12 illustrate the concept of industrial applications of high-density assemblies of ultrafine heat pipes. +1 in the figure
) is an ultra-fine heat pipe (2) is a connected container.

The arrows indicate the flow direction of the heat exchange fluid. Figure 8 shows the horizontal flat plate heating element (or heat receiving element) UJ and ultrafine heat pipe (1)
Figure 9 shows the stacked state of the vertical plate heating element (or heat receiving element) Qυ and the stage row of the ultrafine heat pipe (1).Such a stacked structure is the fuel cell unit. It is expected to be applied to heating and cooling cases such as high-density multi-layer stacks of cells.

FIG. 10 is an application series for a thyristor heatsink.
(13-1) is a heat-receiving metal block composed of several grooved flat plates. (13-2) is the electrical contact surface and the contact surface with the thyristor element. Figure 1 shows the side view, but the arrangement of the straight pipe containers seen from the front is a zigzag or staggered arrangement as shown in the seventh prisoner. . Since the fins are completely omitted, the heat receiving block (13-17 has a total wall thickness of 25 mm) has a laminated structure.
It is now possible to construct it with a thin wall, compared to the conventional 60mm.
The leaves are significantly lighter than those of the mm-65 Dragon. Also, the distance from the electrical contact surface to the heat pipe surface is 25W~
Since the heat pipe is shortened to several minutes compared to the large-sized heat pipe of .32 cod, the thermal resistance is small and the thermal response is greatly improved.

Furthermore, since there is no fin attachment work, costs are also reduced.

Figure 11 is an application column for a hot air (or cold air) generator (
14-13 and (14-2) are heating (or cooling) units. Since fins are not required, significant downsizing is possible.

Figure 12 shows the case α for application as a cooler in a sealed equipment case.
A group of ultra-thin heat pipes are arranged to penetrate the side wall of ω. Since the heat transfer coefficient is high, natural convection cooling is possible.

The integrated structure of the ultrafine heat pipe group can be widely used as an effect of the meandering loop heat pipe according to the present invention.

[Brief explanation of drawings]

1 and 2 are schematic side views showing an implementation row of meandering loop heat pipes according to the present invention, and FIGS. 3 and 4 are partially enlarged sectional views thereof. 61 and 6 show meandering states of a meandering long tube container for arranging heat pipes in three rows and six stages, and FIG. 6 is a front view, and FIG. 61 is a plan view. FIG. 7 is a front view showing a meandering state of a meandering long tube container for high-density arrangement of 1 row and 10 stages. (1-1)...Straight pipe container, (1-2), (1-3
)...Container containing U-shaped bent pipe, (2)...Connecting pipe container, (2-2), (2-4)...Working liquid reservoir, (2-5)...Steam generation heat source, (12-1)
, (12-2)... Heating (or cooling means, αυ
...Temperature controlled body, (13-1), (13-2)
... Cooling means, (3) ... Filling wick, (2-7
)... Working fluid Figures 81 to 12 are conceptual diagrams showing the industrial application of the meandering loop heat pipe according to the present invention. Figures 8 and 9 are application rows for heating (or cooling) of integrated structures of flat heating elements. Figure 10 is application rows for thyristor radiators, and Figure 11 is for hot air (or cold air) generation. Figure 12 shows an application example for cooling a closed case. Metal block, (13-2
J...Electrical contact surface, (14-1). (14-2) Heating (or cooling) unit, haze...
- Sealed casing FIGS. 13 and 14 show the structure of a conventional heat pipe array, and FIGS. 15 and 16 show the structure of a conventional heat pipe array using loop-shaped heat pipes. (2)... Heating header, (3)... Cooling header, (
4-1)...Cooling pipe, (4-2)...Refrigerant liquid, (5
)... Heat generating flat plate % (1-IJ... Heat dissipation part, (1-2
)... Heat receiving part, (9)... Pump. Figure 1 Figure 2 Figure 8 Figure 9! Figure 12

Claims (6)

[Claims] (1) Both ends of the meandering long pipe container are airtightly connected by a connecting pipe container to form a loop-shaped container,
In a meandering loop-shaped heat pipe that is configured to operate while circulating a working fluid and its vapor only in a certain direction by a predetermined means provided in the container, the meandering long pipe container is operated in a predetermined number of directions. Some parts are kept at a relatively high temperature compared to other parts, and the remaining parts are kept at a relatively low temperature, and the working fluid that circulates in one direction alternately evaporates and condenses. Each combination of a set of evaporation section and condensation section acts as a single heat pipe, and the meandering section of the heat pipe as a whole is substantially a series connection of a large number of heat pipes,
A serpentine loop-shaped heat pipe characterized in that each of the heat pipes is arranged at a predetermined position and in a predetermined attitude by meandering in a predetermined shape including a spiral shape of a long tube container. (2) In the meandering loop heat pipe according to claim (1), the meandering long tube container is composed of a combination of two types of containers: a straight tube container group and a container group including a U-shaped tube, Each straight pipe container is held in a nearly horizontal position, and vertically arranged in a large number of stages, each stage is a decimal number of rows, and arranged in a predetermined row of rows, and both ends of the meandering long pipe container are arranged in rows of rows. They are arranged at the top and bottom of the pipe container and are airtightly connected to both the upper and lower ends of the connecting pipe container, and a working fluid reservoir is provided near the upper connecting part of the connecting pipe container. In the meandering loop heat pipe having the container configured as described above, either one of the two types of containers, the straight pipe container and the container including the U-shaped pipe, is configured as a heat radiating part. One of the heat pipes is configured as a heat receiving part, and the connecting pipe container is further equipped with means for pumping up the working fluid to maintain the water level of the working fluid reservoir above a predetermined water level while the heat pipe is in operation. Features a serpentine loop heat pipe. (3) In the meandering loop-shaped heat pipe according to claim (2), U-shaped pipe portions are provided as working fluid reservoirs near both upper and lower ends of the connecting pipe container, and U-shaped pipe portions are provided as working fluid reservoirs, respectively, and U-shaped pipe portions are provided near both upper and lower ends of the connecting pipe container. A wick with excellent capillary action is provided on the inner wall surface over a part of the U-shaped tube adjacent to the heat pipe, and furthermore, during operation of the heat pipe, the temperature of the wick installation portion is lower than the temperature of the upper U-shaped tube portion. A serpentine loop-shaped heat characterized by having the above-mentioned structure as a working fluid pumping means attached to a connecting pipe container, which includes a means for generating a temperature difference between both parts so that the temperature is always maintained at a sufficiently high temperature. pipe. (4) In the meandering loop heat pipe according to claim (2), each straight pipe container is arranged in a single row or in a double row multi-stage arrangement, and the straight pipe containers in adjacent upper and lower stages are connected to each other. A serpentine loop heat pipe characterized in that the curved pipe containers are in an inclined position, and the positions of the straight pipe containers in the corresponding rows are arranged at different positions in a zigzag pattern. (5) In the meandering loop-shaped heat pipe according to claim (2), the meandering long tube container has a portion close to the connecting portion between the uppermost end of the meandering long tube container and the upper end of the connecting tube container. A flow direction restriction means is provided in the interior of the container, in the connecting pipe container, or in either or both of them so that the hydraulic fluid and hydraulic fluid vapor flow only in the direction from the high position side to the low position side of the meandering part of the container. A serpentine loop-shaped heat pipe characterized by being provided. (6) The meandering loop-shaped heat pipe according to claim (2), in which means for restricting the flow rate or flow rate of the hydraulic fluid in a predetermined structure is provided in a predetermined portion of the meandering long pipe container. A meandering loop heat pipe characterized by: