JP2009052757A - Siphon type circulation type heat pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a siphon type circulation type heat pipe capable of extending the range of operation temperature as well as realizing increase of a heat transporting amount, and suitable for use in top heat or horizontal heat. <P>SOLUTION: A heat receiving pipe part is provided at a predetermined part of an annular pipe 1, the heat receiving pipe and a storage tank 2 arranged above the heat receiving pipe are connected by warm liquid rising pipe part, and a steam expansion chamber is continuously provided for the heat receiving pipe part. The storage tank 2 stores heating medium liquid while leaving a void inside, and connects to a warm liquid descending pipe part at its lower part so as to connect to a heat radiation pipe part provided below the tank. The heat radiation pipe part is connected to a cool liquid rising pipe part with its liquid head position higher than the liquid surface level of the heating medium liquid 11 stored in the tank. End parts of the cool liquid rising pipe part and a cool liquid descending pipe part communicating with the heat receiving pipe part are continuously connected via a heat-conductive cooling pipe part penetrating the storage tank 2 going through the void inside the tank. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention can improve the heat pipe, more specifically, extend the operating temperature range, and can dramatically increase the heat transfer property, particularly the heat transport amount, and can be used in top heat and horizontal heat. The present invention relates to a siphon circulation heat pipe that can be used and has a very simple structure.

  As is well known, a heat pipe is generally used as a means for transferring heat at high speed in a heat exchanger, a cooling device, and the like that are found throughout the industry and daily life.

  As such a heat pipe, conventionally, a heat medium liquid is formed by enclosing a heat medium liquid in a single tubular container having a wick on the inner surface, and evaporating by heating the lower part of the container. It is possible to perform continuous heat transport by condensing the condensate by heat consumption in the heat radiating part at the upper part of the container, and returning the condensed liquid to the original heating part even if it is lowered in the wick by capillary force and gravity. A heat pipe having a single tube structure is known (for example, see Patent Document 1).

  However, since the above-mentioned single pipe heat pipe uses the capillary action, there is a limit to the amount of heat transfer liquid transported. However, there was a problem that the heat transfer performance deteriorated rapidly.

  On the other hand, conventionally, by filling and enclosing two types of heat transfer fluids having different vapor pressures in a loop-structured container as described in <Patent Document 2>, the heat transfer fluid is circulated in the vessel by heating. Heat pipes that perform heat transport by releasing the sensible heat of the heat transfer fluid preheated in the heating section at the heat radiating section are also known.

  However, in the prior art according to the above <Reference 1>, the condition that the gas blocked in the pipe can be retained is necessary. Therefore, the pipe diameter must be reduced to about 5 mm or less. Since the liquid medium could not be circulated at high speed, satisfactory heat transportability could not be obtained.

  Further, in the above prior art, it is necessary to provide a flow direction control means such as a check valve in the storage container in order to circulate the heat transfer liquid in a predetermined direction, and the structure is apt to be complicated.

  Therefore, in order to solve the above problems, the applicant of the present invention is provided with a heat receiving pipe part at the lower part and a heat radiating pipe part at the upper part as shown in FIG. Invented a loop-type heat pipe that enables high-speed circulation of the heat transfer fluid using the buoyancy of bubbles by providing a steam shrinkage chamber in the heat radiating tube, and previously filed a patent application (Japanese Patent Application No. 2007-5429). ing.

  However, although the structure of the loop heat pipe according to the above application was suitable for use in bottom heat that receives the heat of the heat transfer fluid heated in the lower part, the structure as it is is used in top heat or horizontal heat. There was a difficulty that the use as a heat pipe was restricted.

  On the other hand, in the past, both ends of a pipe member composed of a continuous U-shaped pipe portion as described in <Patent Document 3> as a circulation heat pipe suitable for use with top heat or horizontal heat are connected to the lower part of the storage tank. In addition, the heat receiving portion and the heat radiating portion are arranged at the lower position of each U-shaped tube portion, and the vapor pressure in the storage tank is increased by heating and boiling the heat transfer fluid in the heat receiving portion, A structure for circulating the heat transfer fluid using the increased vapor pressure is also disclosed.

However, in the prior art according to the above <Reference 3>, since the boiling of the heat transfer liquid in the heat receiving part is unlikely to occur, the heat transfer liquid cooled in the heat radiating part is accommodated in the storage tank before returning to the heat receiving part. There is a structural problem that the amount of heat transportable to the heat radiating portion becomes small because the warm liquid in the storage tank needs to be preliminarily warmed by this, so that the warm liquid in the storage tank is cooled.
Japanese Unexamined Patent Publication No. 2000-171181 (page 2-11, FIGS. 1-7) Japanese Patent Laid-Open No. 1-1111197 (page 2-15, FIGS. 1-7) Japanese Unexamined Patent Publication No. 2004-245666 (page 2-30, FIGS. 1-33)

  The present invention has been made in view of the above-described problems, and the object of the present invention is to automatically convert gas, liquid, and a mixed gas-liquid two-layer flow without requiring assistance from external energy. The heat transfer medium is a heat transport means that can be circulated and can extend the operating temperature range, improve heat transfer, especially increase the amount of heat transport. An object of the present invention is to provide a siphon-type circulation heat pipe that is suitable for use, has a simple structure, and is advantageous in terms of manufacturing.

  Means employed by the present inventor for solving the above problems will be described with reference to the accompanying drawings.

That is, it is a circulating heat pipe capable of transporting heat by circulating the heat medium liquid 11 sealed in the annular pipe 1 in a predetermined direction, and the heat medium liquid 11 is connected to all parts of the circulation path when not operating. To enable the use of the principle of siphon,
A heat receiving pipe section 12 is disposed at a predetermined portion of the annular pipe 1 so that heat exchange with the heating mechanism H is possible. The heat receiving pipe section 12 and the storage tank 2 disposed above the heat receiving pipe section 12 are connected to the hot liquid rising pipe section 13. In addition, the steam expansion chamber E is connected to the heat receiving pipe section 12 to enable continuous supply of bubbles from the steam expansion chamber E to the warm liquid rising pipe section 13 during heat reception.
The storage tank 2 accommodates the heat transfer fluid 11 while leaving a gap S therein, and is connected to a heat radiating pipe section 15 disposed below the tank by connecting a hot liquid descending pipe section 14 to the lower portion. And, the radiating pipe part 15 is connected with a chilled liquid rising pipe part 16 having a liquid head position higher than the liquid level of the heat transfer liquid 11 accommodated in the tank, and the chilled liquid rising pipe part 16 and the The end portions of the cold liquid descending pipe portion 17 communicating with the heat receiving pipe portion 12 are connected to each other via a heat conductive cooling pipe portion 18 penetrating the storage tank 2 via a gap S inside the tank. There is a feature in the point.

  Further, in the present invention, in order to solve the above-described problem, in addition to the above-described means as necessary, technical means of arranging the heat receiving pipe portion 12 above the heat radiating pipe portion 15 in the annular pipe 1 is adopted. can do.

  Further, in the present invention, in order to solve the above-described problem, technical means for arranging the heat receiving pipe portion 12 and the heat radiating pipe portion 15 in the annular pipe 1 in a horizontal state in addition to the above means as necessary. Can be adopted.

  Further, in the present invention, in order to solve the above-mentioned problem, in addition to the above-described means as necessary, a technical means for forming a base portion of the steam expansion chamber E provided in the heat receiving pipe portion 12 of the annular pipe 1 is formed thinly. Can be adopted.

  Further, in the present invention, in order to solve the above-described problems, a technique of increasing the foamability by adding a surfactant to the heat transfer fluid 11 accommodated in the annular pipe 1 in addition to the above means as necessary. Manual means can be employed.

  In addition, in the present invention, in order to solve the above-described problem, in addition to the above-described means as necessary, bumping suppression in which an annular pipe 1 is formed by rounding a boiling stone or an ultracapillary tube in the steam expansion chamber E of the heat receiving pipe portion 12 is performed. It is possible to adopt technical means for interior decoration.

In addition, in the present invention, in order to solve the above-described problem, an annular pipe 1 in which a high-boiling heat transfer fluid 11a is sealed under reduced pressure in addition to the above-described means as necessary. A heat receiving pipe section 12 connected to the heating mechanism H is provided, and a heat radiating pipe section 15 is provided at the upper part, and the heat receiving pipe section 12 and the heat radiating pipe section 15 are connected to the hot liquid rising pipe section 13 and the cold liquid descending section. In communication with the pipe portion 17, the heat transfer liquid 11 a can circulate in the annular pipe 1 when receiving heat, and
A steam expansion chamber E is disposed below the heat receiving pipe portion 12 of the annular pipe 1, and a low boiling point heating medium liquid 11b having a high specific gravity is incompatible with the high boiling point heating medium liquid 11a. While filling, it is possible to continuously supply bubbles from the steam expansion chamber E to the warm liquid riser 13 during heat reception,
A space S is created in the heat radiating pipe portion 15 in the chamber bulging upward, and the low boiling point liquid 11b condensed in the heat radiating pipe portion 15 is passed through a cold liquid descending pipe portion 17 to the heat receiving pipe portion 12. It is possible to adopt a technical means for allowing refluxing in the lower part.

In addition, in the present invention, in order to solve the above-described problem, in addition to the above-described means, heat transport liquid 11a having a high boiling point sealed in the annular pipe 1 under reduced pressure can be circulated in a predetermined direction and transported by heat. It is a circulation type heat pipe, and it enables the use of the siphon principle by connecting the heat transfer fluid 11a at all parts of the circulation path when not in operation.
A heat receiving pipe portion 12 is disposed at a predetermined portion of the annular pipe 1 so that heat exchange with the heating mechanism H is possible, and the heat receiving pipe portion 12 and the primary cooling storage tank 2 disposed above the heat receiving pipe portion 12 are heated. A low-boiling point which is connected by the rising pipe part 13 and has a vapor expansion chamber E below the heat receiving pipe part 12 and is incompatible with the high-boiling-point heat transfer fluid 11a and has a large specific gravity. While filling the heat transfer fluid 11b, it is possible to continuously supply bubbles from the steam expansion chamber E to the warm liquid riser portion 13 during heat reception,
By storing the heat transfer medium 11a in the storage tank 2 leaving a gap S inside, and further connecting a hot liquid transport pipe portion 14 'to the lower part of the heat transfer medium storing portion of the storage tank 2, It is connected to a heat radiating section 15 for secondary cooling arranged below or horizontally in the tank 2, and a chilled liquid transport pipe section 17 ′ is connected to the heat radiating pipe section 15 so as to be arranged in the lower or horizontal direction. The low-boiling point liquid 11b condensed in the storage tank 2 is connected to the installed heat receiving pipe section 12 and passes through the hot liquid transport pipe section 14 ′ and the cold liquid transport pipe section 17 ′ to form the heat receiving pipe section. A technical means for allowing reflux at the bottom of 12 can be adopted.

  Further, in the present invention, in order to solve the above-described problem, the vapor expansion chamber E is provided through a communication pipe 19 communicating with the bottom of the heat receiving pipe section 12 of the annular pipe 1 in addition to the above means as necessary. Technical means can be employed.

  Further, in the present invention, in order to solve the above-described problem, in addition to the above-described means as necessary, technically, perfluorocarbon is used as the low boiling point liquid 11b filled in the lower part of the heat receiving pipe portion 12 of the annular pipe 1. Means can be employed.

  In the present invention, the hot liquid rising pipe part communicating with the heat receiving pipe part of the annular pipe vacuum-sealed with the heat transfer fluid and the hot liquid lowering pipe part communicating with the heat radiating pipe part are connected to the storage tank, and A steam expansion chamber is formed in the heat receiving pipe section, and the heat medium liquid is accommodated in the storage tank leaving a gap, so that when the heat receiving pipe section is heated, the steam expanded in the steam expansion chamber becomes bubbles. The discharged bubbles are continuously discharged to the warm liquid riser section, and the discharged bubbles rise by buoyancy toward the gap in the tank to push the heat transfer fluid upward, while the heat transfer fluid behind the bubbles Since the amount of the rise is sucked in and the heat transfer fluid in the annular pipe can be continuously and efficiently circulated without being intermittent, high-speed and large-scale heat transport can be performed.

  In addition, during the above-described circulation operation, bubbles generated in the steam expansion chamber rise up the warm liquid riser while pushing up the heat transfer liquid, but immediately condense and return to liquid when released into the storage tank. Therefore, the principle of siphon works because the storage tank is always filled with liquid, and the heat transfer liquid stored in the tank once drops to the heat radiating pipe, and then the top of the cold liquid rising pipe It rises again to the position near the top of the storage tank. As described above, the heat medium liquid descends and rises by the siphon action, so that the heat medium liquid smoothly circulates in the annular pipe even if the heat radiating pipe portion is disposed below the storage tank.

  Furthermore, a cooling pipe portion having heat conductivity connected to the ends of the cold liquid rising pipe section connected to the heat radiating pipe section and the cold liquid lowering pipe section communicating with the heat receiving pipe section is stored through a gap inside the tank. The effect of accelerating the condensation and liquefaction of bubbles released into the tank from the warm liquid rising pipe part by cooling the air gap in the tank by the low-temperature heat transfer liquid passing through the cooling pipe part by arranging in the tank As a result, the force for pushing up the liquid from the high-pressure region to the low-pressure region is increased by increasing the vapor pressure difference with the heat receiving pipe portion, and the circulation speed of the heat transfer fluid can be increased.

  In addition, the steam expansion chamber provided in the heat receiving pipe part of the annular pipe can generate air bubbles even when heated in a low temperature region, so that the heat transfer fluid passes through the heat radiating pipe part and then returns to the heat receiving pipe part. It is not necessary to preheat the low-temperature heat transfer liquid with the high-temperature heat transfer liquid in the storage tank before the heat transfer, so that no heat loss is caused by transporting the heat from the heat receiving pipe to the heat radiating pipe. The amount can be increased.

  In addition, since a large amount of the heat transfer liquid accommodated in the storage tank is sequentially supplied to the annular pipe during the circulation operation, the heat transfer liquid is always kept in the pipe except for the bubbles rising in the warm liquid riser. Since the pipe is filled, the pipe can be freely extended vertically or horizontally in the position of the heat receiving pipe section and the storage tank, so that the siphon action can be effectively maintained, and the dryout can be performed. Thus, there is no functional failure such as, and the operating temperature is not unnecessarily limited.

  On the other hand, since the heat receiving pipe part and the heat radiating pipe part are provided via the storage tank, the relative positional relationship between the heat receiving pipe part and the heat radiating pipe part can be arbitrarily changed. It is also possible to design in this form, and it can be used for a wide range of applications such as a solar heat utilization system.

  In addition, the circulation type heat pipe according to the present invention has a very simple structure in which the heat transfer liquid is simply enclosed in the annular pipe and the storage tank, and the amount of the descending liquid and the rising liquid is equal, so that the potential energy is reduced. There is no change, so there is no need to supply work for liquid circulation from the outside.In addition, auxiliary operations for determining the direction of liquid circulation and starting liquid, check valves for liquid and air Since a liquid separation membrane or the like is not required, the production is very easy.

  Therefore, according to the present invention, it is possible to provide a circulation type heat pipe excellent in usability and productivity in addition to a dramatic improvement in heat transportability, and thus the practical utility value of the present invention is very high.

“Example 1”
First, Example 1 of the present invention will be described in detail with reference to FIG. First, what is indicated by reference numeral 1 is an annular pipe, and what is indicated by reference numeral 2 is a storage tank.

  Hereinafter, the configuration of the present embodiment will be described in detail. First, in the present embodiment, the heat receiving pipe portion 12 connected to the heating mechanism H is disposed at a predetermined portion of the annular pipe 1 in which the heat medium liquid 11 is sealed under reduced pressure in a vacuum state having a low boiling point, The heat receiving pipe portion 12 is connected to a storage tank 2 disposed above the heat receiving pipe portion 12 by a hot liquid rising pipe portion 13, and in the vicinity of the hot liquid rising pipe portion 13 of the heat receiving pipe portion 12, a steam expansion chamber that bulges upward. E was formed (see FIG. 1).

  In this embodiment, glass pipes and containers whose internal state can be visually recognized are used for the annular pipe 1 and the storage tank 2.

  The storage tank 2 accommodates a predetermined amount of the heat transfer fluid 11 with the space S left inside, and the discharge port 13a of the warm liquid riser 13 is disposed in the heat transfer fluid 11. The storage tank 2 was evacuated from the exhaust cock 21 opened at the top of the tank to create a vacuum.

  Further, a hot liquid descending pipe section 14 is connected to the lower part of the storage tank 2, and a heat radiating pipe section 15 disposed below the tank via the hot liquid descending pipe section 14 and connected to the cooling mechanism C; In addition to the connection, the radiating pipe portion 15 was connected with a cold liquid rising pipe portion 16 having a top position higher than the liquid level of the heat transfer fluid 11 accommodated in the tank.

  Then, the other end of the cold liquid rising pipe part 16 connected to the heat radiating pipe part 15 is connected to the end of the cold liquid lowering pipe part 17 communicating with the heat receiving pipe part 12 and the gap S inside the tank. It connected and comprised through the heat-conductive cooling pipe part 18 which penetrates the storage tank 2. As shown in FIG.

  With the above-described configuration, when the heat receiving pipe section 12 is heated, the steam expanded in the steam expansion chamber E becomes a bubble B and is continuously discharged to the warm liquid rising pipe section 13, and the released bubble. Since the heat transfer fluid 11 in the annular pipe 1 can be efficiently circulated by B, a large amount of heat can be transported at high speed.

  In the present embodiment, the base of the steam expansion chamber E provided in the heat receiving pipe portion 12 of the annular pipe 1 is formed thin, thereby promoting the generation of bubbles B and increasing the circulation speed.

  Moreover, at the time of the above circulation operation, the same amount of liquid as the heat transfer liquid 11 pushed up by the bubbles rising in the warm liquid rising pipe section 13 as the steam in the vapor expansion chamber E expands is the cold liquid falling pipe section. Since the heat transfer liquid 11 can be pushed up from the heat radiating pipe 15 disposed below the tank to the top of the cold liquid rising pipe 16 by the suction force sucked into the heat receiving pipe 12 through 17, the heat radiating pipe 15 Even if it is provided at a position distant from the tank, the heat transfer fluid 11 circulates smoothly.

  Further, since the cooling pipe portion 18 is disposed in the storage tank in the annular pipe 1, the space S in the tank is cooled by the low-temperature heat transfer liquid 11 passing through the cooling pipe portion 18, and the vapor pressure is excessive. In addition to suppressing the increase, the effect of the decompression tank can be obtained, and the circulation speed of the heat transfer fluid 11 can be increased.

  In the present embodiment, the same glass tube material as that of other portions of the annular pipe 1 is used for the cooling pipe portion 18.

  In addition, the heat medium liquid 11 is filled in the storage tank 2 at an appropriate rate in accordance with the temperature difference between the heat receiving pipe part 12 and the heat radiating pipe part 15, so that the flow rate of the heat medium liquid 11 circulating in the annular pipe 1 is reduced. Automatic adjustment is also possible.

  On the other hand, since the bubble expansion chamber E provided in the heat receiving pipe portion 12 of the annular pipe 1 can favorably generate the bubbles B even by heating in the low temperature region, the low temperature heat transfer liquid that has passed through the heat radiating pipe portion 15. It is no longer necessary to preheat 11, and the amount of heat transport from the heat receiving pipe section 12 to the heat radiating pipe section 15 can be increased without losing transport heat.

  In addition, during operation, the annular pipe 1 is always filled with the heat transfer liquid 11 except for air bubbles, so that the potential energy of the liquid does not change during operation due to siphon action, and there is a problem such as dryout. It does not occur.

  On the other hand, in the present embodiment, the heat receiving pipe portion 12 is arranged above the heat radiating pipe portion 15 and is configured in a top heat form capable of transporting heat from the upper heating mechanism H to the lower cooling mechanism C. Therefore, it can be used for applications such as a solar heat utilization system.

  In addition, the circulation type heat pipe in this embodiment has a very simple structure in which the heat transfer liquid 11 is enclosed in the annular pipe 1 and the storage tank 2, and it is also necessary to supply work for liquid circulation from the outside. In addition, there is no need for an auxiliary operation for determining the direction of the liquid circulation or starting the liquid, and a liquid check valve, a gas-liquid separation membrane or the like is also required, so that the manufacture is very easy.

  In this embodiment, the addition of a fatty acid salt, which is a surfactant, to the heat transfer fluid 11 sealed in the annular pipe 1 improves the foaming property, promotes the generation of bubbles B, and has the effect of the bubble pump. Greatly improved.

  In addition, since the generation of the bubbles B is promoted by the addition of the surfactant, the effect of the bubble pump is not easily lost even if the tube diameter is expanded to several centimeters or more.

“Example 2”
Next, Example 2 of the present invention will be described below with reference to FIG. In the present embodiment, the heat receiving tube portion 12 and the heat radiating tube portion 15 are arranged in a horizontal position in the annular pipe 1 and configured in the form of a horizontal heat capable of transporting heat to a horizontally separated position. Thus, it can be used as a heat transport means in an environment where the height is lower than the width or depth, such as the inside of a notebook computer (see FIG. 2).

  The annular pipe 1 and the storage tank 2 are made of stainless steel pipes and containers having excellent strength and workability. Further, ethyl alcohol having a boiling point lower than that of water is added to the heat transfer liquid 11 sealed in the annular pipe 1. By using it, it becomes possible to carry out heat transport even in heating in a low temperature range and a low temperature difference.

“Example 3”
Next, Embodiment 3 of the present invention will be described below with reference to FIG. In the present embodiment, the cooling pipe portion 18 of the annular pipe 1 disposed in the storage tank 2 is wound in the gap S, so that the surface area in contact with the vapor in the gap S is expanded and the cooling effect is improved. (See FIG. 3).

  Further, in the present embodiment, the hot liquid descending pipe portion 14 and the cold liquid descending pipe portion 17 of the annular pipe 1 are made of tubular members having a diameter larger than that of the cold liquid rising pipe portion 16 and the warm liquid rising pipe portion 13. Accordingly, it is possible to reduce the pipe frictional resistance related to the lowering of the heat transfer fluid 11 converted from the potential energy during circulation, thereby promoting the circulation action.

  In addition, a copper pipe material having excellent heat conductivity is used for the cooling pipe portion 18 of the annular pipe 1, and acetone having a boiling point lower than that of ethyl alcohol is used for the heat transfer liquid 11 sealed in the annular pipe 1. This makes it possible to expand the operating temperature range of the heat pipe.

Example 4
Next, a fourth embodiment of the present invention will be described with reference to FIG. In this embodiment, in the annular pipe 1 having the heat receiving pipe portion 12 connected to the heating mechanism H in the lower portion and the heat radiating tube portion 15 in the upper portion, the heat receiving pipe portion 12 and the heat radiating pipe portion 15 are heated up. The pipe part 13 and the cold liquid descending pipe part 17 communicate with each other, and the high boiling point heating medium liquid 11a is sealed in the pipe under reduced pressure, and a vapor expansion chamber E is disposed below the heat receiving pipe part 12, The high boiling point heat medium liquid 11a is incompatible with the low boiling point heat medium liquid 11b having a large specific gravity (see FIG. 4).

  With the above configuration, a part of the low-boiling liquid 11b accumulated at the lower portion of the heat receiving pipe portion 12 with a specific gravity is vaporized in the vapor expansion chamber E, and bubbles B are generated due to the thermal expansion of the vapor to generate a temperature. The high boiling point liquid 11a could be circulated effectively by ascending the inside of the liquid riser section 13.

  The low boiling point liquid 11b that has been vaporized into bubbles B is condensed in the heat radiating pipe section 15 and then refluxed to the lower part of the heat receiving pipe section 12 through the cold liquid descending pipe section 17, so that the bubbles B are interrupted. It can be generated continuously without causing it.

  Thereby, the improvement of the sensible heat transport property in a bottom heat type heat pipe and the expansion of the operating temperature range in a low-temperature heating region can be aimed at.

  In this example, as the low boiling point liquid 11b, perfluorocarbon (PFC) having a specific gravity greater than that of the water employed in the high boiling point liquid 11a and incompatible with water is used. It is also possible to use other fluorine-based liquids such as environmentally friendly hydrofluoroether (HFE), natural refrigerants, and the like for 11b.

  In this embodiment, the supply position of the bubble B can be adjusted by providing the steam expansion chamber E via the communication pipe 19 that communicates with the bottom of the heat receiving pipe section 12 of the annular pipe 1. Bubbles B can be lifted from directly below the warm liquid riser section 13.

“Example 5”
Next, Embodiment 5 of the present invention will be described below with reference to FIG. In the present embodiment, in the annular pipe 1 in which the high-boiling point heat medium liquid 11a is sealed under reduced pressure, the lower part of the heat receiving pipe part 12 is filled with the low boiling point heat medium liquid 11b to promote the generation of bubbles B, and the heat receiving pipe part 11 A heat radiating pipe portion 15 is arranged at substantially the same height as the storage tank 2 connected to the hot liquid riser pipe portion 13 to which the bubbles B are supplied from, and this heat radiating pipe portion 15 is further connected to the hot liquid transport pipe portion 14 '. By connecting to the storage tank 2 and the heat receiving pipe section 11 by the cold liquid transport pipe section 17 ′, the heat medium liquid 11 is configured to be able to circulate in the annular pipe 1 (see FIG. 5).

Then, the bubble B to increase the hot liquid rising pipe section 13 is discharged into the gap S of the storage tank 2, and condensed is cooled by primary cooling mechanism C ₁ to low boiling point liquid 11b, the horizontal with a high-boiling liquid 11a through disposed in the direction hot liquid transport pipe section 14 'moves into the radiator tube section 15 and radiating the sensible heat with the high-boiling heat transfer fluid 11a by a secondary cooling mechanism C ₂ in the radiator tube section 15 Thereafter, the refrigerant flows down to the heat receiving pipe section 11 through the cold liquid transport pipe section 17 ′.

  By configuring as described above, not only the sensible heat transportability of the heat transfer medium 11 circulating in the annular pipe 1 is increased, but also the height of the heat radiating pipe portion 15 in the annular pipe 1 is stored with the heat receiving pipe portion 12. Since it can be freely adjusted between the heights of the tank 2, the design flexibility of the heat pipe is improved and it is possible to cope with various uses.

  The present invention is generally configured as described above. However, the present invention is not limited to the illustrated embodiment, and various modifications can be made within the scope of the claims, for example, an annular pipe. The material of the storage tank 2 and the storage tank 2 may be appropriately selected from glass materials, metal materials, and plastic materials as long as they have a certain strength and durability. It is preferable to select one having excellent thermal properties.

  Further, as the heat transfer medium 11 accommodated in the annular pipe 1, not only water, ethyl alcohol, acetone and perfluorocarbon, but any liquid material having a boiling point suitable for use may be adopted. The surfactant to be added to the heat transfer fluid 11 of the pipe 1 is not only selected from fatty acid salts but also selected from anionic, cationic, nonionic and zwitterionic surfactants as appropriate. be able to.

  Further, the number, form, and installation position of the steam expansion chamber E may be changed as long as bubbles are effectively continuously supplied into the ascending pipe portion 14a, and the purpose of controlling the flow rate of the heat transfer liquid 11 Further, for the purpose of sensing the flow from the outside, a small sphere that moves as it flows in the annular pipe may be enclosed.

  Further, when there is no necessity for heat exchange between the heat transfer liquid 11 that flows back to the heat receiving pipe section 12 and the gas and liquid in the storage tank 2, the cold liquid rise pipe section 16 goes to the cold liquid down pipe section 17. There is no need to allow the flowing pipe material to penetrate through the storage tank 2, and it may be installed at any vertical position outside the storage tank 2.

  Furthermore, also in the form of the storage tank 2, as shown in FIG. 6, a narrowed portion 22 is provided to reduce the contact area between the gap S and the heat transfer fluid 11 accommodated in the tank, thereby reducing the inside of the cooled gap S. The amount of heat of the hot liquid taken away by the steam may be reduced, and in the annular pipe 1, a lump of a boiling stone F or a microcapillary tube is provided in the steam expansion chamber E of the heat receiving pipe section 12 to provide bubbles. These may be enhanced, and both belong to the technical scope of the present invention.

  In recent years, heat pipes have been used for local cooling of personal computer electronics, cooling of automobile engines, indoor heating systems using solar heat on the roof, indoor cooling systems using outdoor cold air, factory waste heat, Widely used as a means of heat transport such as transport, it is one of the most important technologies essential for future industrial development.

  Under such circumstances, the siphon circulation heat pipe of the present invention is extremely practical and capable of wide use in top heat and horizontal heat, in addition to the dramatic improvement in heat transportability, which is a functional aspect. Since it is a simple and useful technology, there is a great demand in the market and it can be said that the industrial utility value of the present invention is very high.

It is explanatory sectional drawing showing the circulation type heat pipe in Example 1 of this invention. It is explanatory sectional drawing showing the circulation type heat pipe in Example 2 of this invention. It is explanatory sectional drawing showing the circulation type heat pipe in Example 3 of this invention. It is explanatory sectional drawing showing the circulation type heat pipe in Example 4 of this invention. It is explanatory sectional drawing showing the circulation type heat pipe in Example 5 of this invention. It is explanatory sectional drawing showing the circulation type heat pipe in the modification of this invention. It is explanatory sectional drawing showing the loop type heat pipe which concerns on the patent application which the present applicant applied previously.

Explanation of symbols

1 annular pipe
11 Heat transfer fluid
11a High boiling point liquid
11b Low boiling point liquid
12 Heat receiving pipe
13 Hot liquid riser
13a outlet
14 Hot liquid downcomer
14 'Hot liquid transport pipe
15 Radiation tube
16 Cold liquid riser
17 Cold liquid downcomer
17 'Cold liquid transport pipe
18 Cooling pipe section
19 Communication pipe 2 Storage tank
21 Exhaust cock
22 Constriction H Heating mechanism C Cooling mechanism C ₁ Primary cooling mechanism C ₂ Secondary cooling mechanism E Vapor expansion chamber S Void B Bubble

Claims (10)

A circulating heat pipe capable of transporting heat by circulating a heat medium liquid 11 sealed in an annular pipe 1 in a predetermined direction, and connecting the heat medium liquid 11 in all parts of the circulation path when not operating. The use of the principle of siphon
A heat receiving pipe section 12 is disposed at a predetermined portion of the annular pipe 1 so that heat exchange with the heating mechanism H is possible. The heat receiving pipe section 12 and the storage tank 2 disposed above the heat receiving pipe section 12 are connected to the hot liquid rising pipe section 13. In addition, the steam expansion chamber E is connected to the heat receiving pipe section 12 to enable continuous supply of bubbles from the steam expansion chamber E to the warm liquid rising pipe section 13 during heat reception.
The storage tank 2 accommodates the heat transfer fluid 11 while leaving a gap S therein, and is connected to a heat radiating pipe section 15 disposed below the tank by connecting a hot liquid descending pipe section 14 to the lower portion. And, the radiating pipe part 15 is connected with a chilled liquid rising pipe part 16 having a liquid head position higher than the liquid level of the heat transfer liquid 11 accommodated in the tank, and the chilled liquid rising pipe part 16 and the The end portions of the cold liquid descending pipe portion 17 communicating with the heat receiving pipe portion 12 are connected to each other via a heat conductive cooling pipe portion 18 penetrating the storage tank 2 via a gap S inside the tank. Siphon type circulation heat pipe characterized by that.   The siphon-type circulation heat pipe according to claim 1, wherein the heat receiving pipe section (12) is disposed above the heat radiating pipe section (15) in the annular pipe (1).   The siphon-type circulation heat pipe according to claim 1, wherein the heat receiving pipe section (12) and the heat radiating pipe section (15) are arranged in a horizontal state in the annular pipe (1).   The siphon circulation heat pipe according to any one of claims 1 to 3, wherein a base portion of the steam expansion chamber E provided in the heat receiving pipe portion 12 of the annular pipe 1 is formed thin.   The siphon circulation heat pipe according to any one of claims 1 to 4, wherein a foaming property is increased by adding a surfactant to the heat transfer fluid 11 accommodated in the annular pipe 1.   6. The bumping suppression material formed by rounding a boiling stone or a microcapillary tube is provided in the steam expansion chamber E of the heat receiving pipe portion 12 in the annular pipe 1, according to claim 1. Siphon circulation heat pipe. An annular pipe 1 in which a high-boiling heat transfer liquid 11a is sealed under reduced pressure. The annular pipe 1 includes a heat receiving pipe portion 12 connected to a heating mechanism H at a lower portion, and a heat radiating pipe portion 15 at an upper portion. The heat receiving pipe section 12 and the heat radiating pipe section 15 are communicated with each other through a hot liquid rising pipe section 13 and a cold liquid lowering pipe section 17, and the heat transfer liquid 11a passes through the annular pipe 1 when receiving heat. Can be circulated and
A steam expansion chamber E is disposed below the heat receiving pipe portion 12 of the annular pipe 1, and a low boiling point heating medium liquid 11b having a high specific gravity is incompatible with the high boiling point heating medium liquid 11a. While being filled, it is possible to continuously supply bubbles from the vapor expansion chamber E to the warm liquid riser section 13 during heat reception,
In the heat radiating pipe portion 15, a void S is created in the chamber bulging upward, and the low boiling point liquid 11 b condensed in the heat radiating pipe portion 15 passes through the cold liquid descending pipe portion 17 and the heat receiving pipe portion. A siphon type circulation heat pipe characterized by being able to return to the lower part of 12. A circulating heat pipe capable of transporting heat by circulating a high boiling point heat transfer medium 11a sealed in an annular pipe 1 in a predetermined direction, and the heat transfer liquid 11a in all parts of the circulation path when not operating. It is possible to use the principle of siphon by connecting,
A heat receiving pipe portion 12 is disposed at a predetermined portion of the annular pipe 1 so that heat exchange with the heating mechanism H is possible, and the heat receiving pipe portion 12 and the primary cooling storage tank 2 disposed above the heat receiving pipe portion 12 are heated. A low-boiling point which is connected by the rising pipe part 13 and has a vapor expansion chamber E below the heat receiving pipe part 12 and is incompatible with the high-boiling-point heat transfer fluid 11a and has a large specific gravity. While filling the heat transfer fluid 11b, it is possible to continuously supply bubbles from the steam expansion chamber E to the warm liquid riser portion 13 during heat reception,
By storing the heat transfer medium 11a in the storage tank 2 leaving a gap S inside, and further connecting a hot liquid transport pipe portion 14 'to the lower part of the heat transfer medium storing portion of the storage tank 2, It is connected to a heat radiating section 15 for secondary cooling arranged below or horizontally in the tank 2, and a chilled liquid transport pipe section 17 ′ is connected to the heat radiating pipe section 15 so as to be arranged in the lower or horizontal direction. The low-boiling-point liquid 11b condensed in the storage tank 2 is connected to the heat receiving pipe section 12 provided, and passes through the hot liquid transport pipe section 14 ′ and the cold liquid transport pipe section 17 ′. A siphon type circulation heat pipe characterized by being able to return to the lower part of 12.   The siphon-type circulation heat pipe according to claim 7 or 8, wherein a steam expansion chamber E is provided through a communication pipe 19 communicating with the bottom of the heat receiving pipe section 12 of the annular pipe 1. The siphon circulation heat pipe according to any one of claims 7 to 9, wherein perfluorocarbon is used as the low boiling point liquid 11b filled in the lower part of the heat receiving pipe portion 12 of the annular pipe 1.

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