WO2005010451A1

WO2005010451A1 - Thermosyphon and method of manufacturing the same

Info

Publication number: WO2005010451A1
Application number: PCT/JP2004/010316
Authority: WO
Inventors: Toshio Takehara
Original assignee: Takehara, Chikara
Priority date: 2003-07-28
Filing date: 2004-07-20
Publication date: 2005-02-03
Also published as: KR101051277B1; JP2005048995A; CN1833154A; KR20060055510A; JP4366683B2; CN100447520C

Abstract

A thermosyphon formed in a simple structure, enabling an increase in heat transfer efficiency for transferring heat from the thermosyphon to the outside, and manufacturable at low cost and a method of manufacturing the thermosyphon. The double tube type thermosyphon is formed in a single and constant outside diameter size of cylindrical shape having an outer tube (10) and plug bodies (14). The outer tube (10) and the plug bodies (14) are formed in the constant outside diameter (K) size so as to come into contact simultaneously with one plane put on the upper outer surface thereof. Thus, for example, when the syphon is installed under a floor, the syphon is continuously fitted to an upper heat transfer plate in the longitudinal direction to reduce heat transfer loss and increase the heat transfer efficiency. Also, the yielding of material can be increased by reducing cut-out portions.

Description

Specification

Thermal siphon and method of manufacturing the same

Technical field

The present invention relates to a thermal siphon and a method of manufacturing the same, and more particularly to a double-pipe type thermal siphon in which an inner pipe for heat source fluid flow is passed through an outer pipe as a main pipe and a method of manufacturing the same.

^ Technology

[0002] To transfer a large amount of heat with a small temperature difference by using condensation and evaporation phase change for heat conversion equipment such as a heat pump whose heat exchange efficiency decreases as the temperature difference between heat exchange fluids decreases. Thermosyphons that can be used are being put to practical use in recent years. Above all, it is noted that the heat transfer is conducted horizontally, for example, by passing the inner tube for heat source fluid flow into the outer tube and conducting heat transfer horizontally, for example. FIG. 11 shows a conventional double-pipe type thermal siphon of Japanese Patent Application No. 2002-262289 previously proposed by the applicant, and FIG. 14 shows an exploded perspective view thereof. The conventional thermal siphon shown in FIG. 11 is, for example, disposed inside a metal outer pipe 100 having an outer diameter of 50 mm, an inner diameter of 47 mm, and a pipe length of about 300 mm, penetrating the inner pipe 102 having a longer pipe length than the outer pipe in the longitudinal direction. A cap 106 having a hole 104 with which the inner pipe is engaged is inserted from the both ends of the outer pipe while inserting the inner pipe 102 through the hole 104 to close the inside of the outer pipe 100, and further, the cap is provided The inside of the outer tube 100 is hermetically sealed by tightening the flange 110 so as to squeeze it toward the center side of the outer tube. Oring 108 is attached to the outer periphery of the cap 106. Then, a small cap 112 having an O-ring 108 interposed in a portion where the inner pipe 102 is penetrated and both ends are protruded from both ends of the outer pipe is fitted and fixed to the inner pipe communication hole 104. (See Figure 14).

Patent Document 1: Japanese Patent Application No. 2002-262289

Disclosure of the invention

Problem that invention tries to solve

[0003] In the conventional thermal siphon shown in Patent Document 1 above, the space filled with the working fluid in the outer tube and the inner tube is vacuumed to smooth the phase change of the fluid, and , Even, corrosion resistant In the prior art, a cap 106 with a flange 110 protruding in the middle as shown in FIG. In this state, by tightening the flange 110 so as to squeeze the flange 110 toward the longitudinal central side of the outer pipe, the open end of the outer pipe is accommodated in a bag shape and fixed to the outer pipe 100 as shown in FIG. Met. However, in this thermal siphon, as shown in FIG. 13, a step F is generated at the end portions of one thermal siphon and the outer tube portion between them by the thickness of the flange 110A which is crimped and bent in the lateral direction. For this reason, heat transfer loss is caused, for example, due to the gap with the uniform heat transfer plate 114 such as an aluminum plate laid on the upper side when it is arranged under the floor in the horizontal direction and the upper indoor side is heated etc. As a result, it causes heating to the inside of the room or reduces the cooling efficiency. Furthermore, due to the step F, a gap is generated between the heat siphon tube and the support member disposed at the lower part of the flooring material, and there is a risk that a noise such as a floor will be generated each time the user walks.

Furthermore, in the conventional thermal siphon disclosed in Patent Document 1 mentioned above, the outer tube portion is a solid cylinder that closes both ends of the force outer tube 100 formed by, for example, extruding or drawing aluminum. The cap 106 can not be made thinner in the axial direction as shown in FIGS. 12 and 13 in order to maintain the strength for receiving the clamping force in the drawing process during the clamping operation by the clamping device. Also, in order to keep the vacuum tight, the aluminum bar of diameter D of flange 110 in FIG. 12 was cut and manufactured. Therefore, the manufacturing cost of the thermal siphon tube itself, which has a low material yield of this cap, is high.

The present invention has been made in view of the above-mentioned conventional problems, and its object is to provide a simple structure, and to improve the heat transfer efficiency to the outside of the apparatus itself, and to be installed at the lower part of the floor. It is an object of the present invention to provide a thermal siphon and a method of manufacturing the same which can prevent generation of floor noise and the like when applied as a heating or cooling device. Furthermore, another object of the present invention is to provide a thermosiphon and its method which can improve the yield of materials for manufacturing and reduce the manufacturing cost.

Means to solve the problem

[0006] In order to achieve the above object, the present invention arranges the inner pipe 12 longitudinally through the inside of the outer pipe 10 which is disposed laterally and whose both end openings 10a and 10b are sealed by the plug 14 , Outer pipe and inner pipe The double-pipe thermosyphon, in which the working fluid Q is enclosed in the vacuum working space S of the above and heat exchange with the outer pipe outer area is performed while flowing the heat source fluid M inside the inner pipe 12. The thermosiphon 1 is characterized in that the outer tube 10 and the plug 14 are formed to have the same outer diameter size K so as to be in contact with one plane placed simultaneously. The outer tube that determines the external shape of the thermal siphon itself may be a cylinder, a triangle, a square, or any other polygonal shape, in which case the plug may have a similar shape. The plug needs to have the same cross-sectional shape as the outer tube. If it is an aspect such as a heat transfer plate where one surface is applied, it will not be possible to form a part that is not in close contact with a step or recess. Well ,. In this sense, in the case where the outer pipe is applied from the lower side or other circumferences to the outer pipe, it is preferable that the configuration be such that it can be in close contact with the surface so as to form a continuous tangent line. is there.

At that time, the outer pipe 10 and the plug body 14 are externally pressurized by the external pressure means by the external pressurizing means in a state where the plug body 14 is fitted in the both end openings 10a and 10b of the outer pipe 10. Should be fixed. The external pressure means may be performed manually using an instrument or automatically via a driving force.

Furthermore, the stoppers (14A, 14B) at both end openings 10a, 10b of the outer tube 10 may be sealed by elastic sealing means (26). For example, although O-rings and the like can be mounted at the lowest cost and with a simple mounting structure, the present invention is not limited thereto, and other packings, rubber members, synthetic members, etc. may be used.

In addition, the plug body 14 may be provided with a recessed groove 28 which receives pressure from the external pressing means and receives the recessed deformation 101 of the outer tube 10. By means of the concave deformation of the outer tube and the receiving recess of the plug on the lower surface side, the outer tube can be simply and firmly fitted and fixed only by pressing from outside the outer tube. The concave groove cross-sectional shape may be arbitrary. The groove width may be set wide to some extent.

Plug body 14 has an outer plug portion 20 having the same outer diameter as outer pipe 10, and an inner plug portion which is diameter-reduced from the outer plug portion in a step-like manner and integrally coupled and fitted onto the inner wall of outer pipe 10. The inner plug portion 22 may be formed with an elastic sealing member mounting groove 24 and the outer pipe concave deformation receiving groove 28.

Further, the present invention includes an outer plug portion having the same outer diameter as the outer pipe, and an inner plug portion integrally connected to the outer plug portion and inserted into and fitted to the inner wall of the outer pipe. A sealing member mounting groove and an outer pipe concave deformation receiving groove are formed, and a plug body having an inner pipe through hole opened is prepared, and the outer pipe is penetrated in the longitudinal direction to arrange the inner pipe. The elastic sealing member mounting groove of the inner plug part In a state where the elastic sealing member is attached, the opening at both ends of the outer pipe is sealed with a plug body, the working fluid is enclosed in the space between the outer pipe and the inner pipe, and the plug body is fitted in the opening at both ends of the outer pipe. According to the manufacturing method of a thermal siphon characterized in that the outer pipe and the plug are integrally fixed by pressurizing the outer surface of the outer pipe in a portion corresponding to the outer pipe concave deformation receiving groove in the state. Configured

Effect of the invention

According to the present invention, the inner pipe is disposed longitudinally through the outer pipe which is disposed laterally and whose both end openings are sealed by the plug, and the working fluid is enclosed in the vacuum working space between the outer pipe and the inner pipe. A double-pipe thermosyphon that exchanges heat with the outside of the outer pipe while letting the heat source fluid flow inside the inner pipe,

Since the outer pipe and the plug body are formed by the same outer diameter and having a same size as the thermal siphon force so as to simultaneously contact one plane placed on the upper outer surface, the sealing of the working space or the support of the inner pipe The plug body and the outer tube to be formed become a single cylindrical body, and therefore, when installed under the floor, for example, the heat transfer plate on the upper surface is continuously in close contact in the longitudinal direction, reducing heat transfer loss. In addition to improving the heat transfer efficiency, there can be no level difference between the plug body and the outer pipe, and no offensive noise such as floor noise can be generated. In addition, the structure of the support of the thermosiphon in the concrete floor laying and other specific application locations is simplified. Furthermore, it is possible to be compatible with the fixing structure by clamping pressure from the surface side of the outer tube and to reduce the manufacturing cost.

Further, by fixing the outer pipe and the plug by the external pressurization to the outer pipe by the external pressurizing means in a state in which the plug is fitted in the both end openings of the outer pipe, the outer pipe and the plug are fixed. The plug body and the outer tube can be configured as a single cylindrical body, and heat transfer efficiency can be improved, noise can be prevented, and manufacturing costs can be reduced.

[0014] In addition, by forming a configuration that is sealed by the elastic sealing means with each plug body at both end openings of the outer pipe, for example, an O-ring etc. is attached to the plug body and inserted into the outer pipe. Can be used to seal the inside and to simplify the structure for air tightness or water tightness

In addition, the plug receives a pressure from the external pressure unit and receives a concave deformation of the outer tube. With the grooved structure, the outer pipe can be reliably fixed to the plug only by clamping and pressing after the plug is attached to the outer pipe, the fixing structure is simplified, and the fixing operation is also possible. It can be done easily.

Furthermore, the plug body has an outer plug portion having the same outer diameter as the outer pipe, and an inner plug portion which is diameter-reduced from the outer plug portion in a step-like manner and integrally coupled and inserted into and fitted to the inner wall of the outer pipe. By including an elastic sealing member mounting groove and the outer pipe concave deformation receiving groove formed in the inner plug portion, the sealing portion and the fixing portion can be formed in a short cylindrical simple structure. The same plug body can be formed to reduce the cost.

The present invention also includes an outer plug having the same outer diameter as the outer pipe, and an inner plug that is integrally connected to the outer plug and inserted into and fitted to the inner wall of the outer pipe, and the inner plug is resilient. A sealing member mounting groove and an outer pipe concave deformation receiving groove are formed, and a plug body having an inner pipe through hole opened is prepared, and the outer pipe is penetrated in the longitudinal direction to arrange the inner pipe. With the elastic sealing member attached to the elastic sealing member mounting groove of the inner plug portion, the openings at both ends of the outer pipe are sealed with a plug to seal the working fluid in the space between the outer pipe and the inner pipe. The outer pipe and the plug are integrally fixed by pressing the outer surface of the outer pipe at a portion corresponding to the concave deformation receiving groove of the outer pipe while the plug is fitted in the both end openings of For example, when installed under the floor, the heat transfer plate on the upper surface is continuously densely connected to the heat transfer plate in the longitudinal direction. In addition to reducing heat transfer loss and improving heat transfer efficiency, it is possible to prevent steps between the plug body and the outer pipe and prevent generation of offensive noise such as floor noise. Furthermore, the amount of scraping of metal from the rod can be reduced, and the material yield can be well maintained.

Brief description of the drawings

FIG. 1 is a partially cutaway perspective view of a thermal siphon according to a first embodiment of the present invention.

[FIG. 2] A longitudinal sectional view of the thermal siphon of FIG.

Fig. 3 is a side view of the plug of the thermal siphon of Fig. 1;

FIG. 4 is an exploded perspective view of the thermal siphon of FIG.

[FIG. 5] It is a partially omitted enlarged cross-sectional view showing a plug fitting state to the thermal siphon of FIG.

[Fig. 6] Fig. 5A-A is a view on arrow A of Fig. 5A.

FIG. 7 is an explanatory view of the operation when the plugging body is fitted to the thermal siphon of FIG. 1; [FIG. 8] It is a B-B arrow line view of FIG.

FIG. 9-1 is a side view showing another embodiment of the outer tube concave deformation receiving groove.

[Fig. 9-2] Fig. 9-2 is a view on arrow C-C in Fig. 9_1.

FIG. 10-1 is a side view showing still another embodiment of the outer tube concave deformation receiving groove.

FIG. 10-2 is a view on arrow D-D in FIG. 10-1.

FIG. 11 is a partially cutaway perspective view of a conventional thermal siphon.

FIG. 12 is a side view of a conventional thermal siphon cap.

FIG. 13 is an explanatory view of a state in which a heat transfer plate is disposed on a conventional thermal siphon.

FIG. 14 is an exploded perspective view of a conventional thermal siphon.

Explanation of sign

[0019] 1 Thermal siphon

10 Outer tube

10a, 10b open at both ends

12 inner pipe

14 plug body

20 Outer stopper

22 internal plug

24 First groove

26 O-ring

28 recessed groove

D diameter

Q hydraulic fluid

S working space

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an embodiment of a thermal siphon according to the present invention will be described together with a method of manufacturing the same, based on the attached drawings. In the thermal siphon of the present invention, the inner tube for heat source fluid M flows through the outer tube, and the heat and heat from the heat source fluid cause high-speed evaporation of the working fluid (medium) in the outer tube by heat and heat transfer through the condensation cycle. Heat or cool the outer tube by performing It is a heat transfer means. In particular, in the present embodiment, a plurality of thermosyphons are arranged horizontally connected, for example, under the floor of a building, and are devices for underfloor heating that perform indoor heating by the supply of a heat source fluid from a heat source device. An example of application to

1 to 8 show a thermal siphon 1 of the present embodiment. In FIG. 1, the thermal siphon 1 includes an outer pipe 10 and an inner pipe 12 disposed longitudinally through the outer pipe. And a plug body 14 for sealing the outer pipe while disposing and supporting the inner pipe 12 with respect to the outer pipe 10. In FIG. 2 and FIG. 4, the intermediate gap between the outer pipe 10 and the inner pipe 12 is filled with the hydraulic fluid Q to form an operating space, and evaporation and condensation of the hydraulic fluid in the operating space is made vacuum. Heats or cools the outer part of the outer tube 10 through action. In the embodiment, the outer tube 10 is open at both ends using, for example, aluminum alloy as a material, and is configured in a hollow cylindrical shape with a size of 50 mm outer diameter, 47 mm inner diameter, and 300 mm long, for example. In this case, it is placed in horizontal condition and used. Then, in parallel with the outer pipe 10, an inner pipe 12 made of the same material as the outer pipe is disposed so as to penetrate the outer pipe 10 in the longitudinal direction. The outer tube 10 defines the entire outer shape of the thermal siphon and is supported by various supports and support structures, and the working fluid is sealed inside to exchange heat transferred from the working fluid with the outer region of the outer tube. Directly warm or cool the surroundings.

The inner pipe 12 is formed of a hollow cylindrical pipe made of the same aluminum alloy as the outer pipe, to which cold heat or heat source fluid such as a refrigerant or heat medium is supplied, and the heat is dissipated or released. It receives heat from the outside and causes the phase change between the liquid phase and the gas phase while evaporating or condensing the hydraulic fluid Q. As shown in the figure, the inner pipe 12 has an outer diameter smaller than the inner diameter of the outer pipe, and holds the working fluid in the space between the inner wall of the outer pipe and the outer wall of the inner pipe formed at the time of insertion through into the outer pipe. Let The tube diameter of the inner tube is set so that the heat transfer efficiency by the hydraulic fluid Q is good. In the embodiment, the inner pipe 12 is disposed at a position slightly off center from the center inside the outer pipe. In the present embodiment, the inner pipe 12 is set so that its pipe length is longer than the pipe length of the outer pipe, and this portion is used as the connecting projection 16 of the inner pipe. The inner pipe 12 is supported by the plug 14 in a state of penetrating the inner pipe communication hole 15 of the plug 14 described later and further penetrating the inside of the outer pipe 10 in the longitudinal direction.

[0023] Both end openings 10a and 10b of the outer tube 10 are sealed by a plug 14 and the inside of the outer tube is sealed. ing. The plug 14 is made of the same aluminum alloy as the outer and inner pipes, and as shown in FIG. 3, is made of a solid substantially cylindrical body. In the embodiment, the plug 14 is in contact with the outer surface of the outer tube 10 at the same time with the outer surface of the outer tube 10 when one flat surface such as the heat transfer plate 18 is placed on the upper surface thereof with the device placed in a long horizontal position. It has a solid short cylinder body strength with an outer diameter size K. That is, in the embodiment, when the plug bodies 14A and 14B are inserted into the both end openings 10a and 10b of the outer pipe 10, respectively, the plug body and the outer pipe 10 have the same outer diameter IC like a single pipe member It has an even outer shape in which only a part of the outer peripheral portion protrudes in a planar manner or a recessed portion is not formed. The uniformity of the outer diameter size and the outer diameter shape is not limited to a cylindrical shape, and may be, for example, a triangular cylinder, a square cylinder, or another polygonal cylinder corresponding to the form of the outer tube. Thus, when laying a large number of thermal siphons, for example, on the lower surface side of the indoor and outdoor floors, a holding groove or the like commonly formed in the support mat or other support member. The heat transfer plate and the outer surface of the thermal siphon are in close contact with each other in the longitudinal direction without any step, and highly efficient heating or cooling without heat transfer loss to the heat transfer plate 18 is possible. Even when pressure is applied when walking from the upper surface side, there is no noise, and construction obstacles can be removed.

In this embodiment, the thermal siphon 1 is configured such that external pressure is applied to the outer tube by the external pressing means in a state in which the plug 14 is fitted inside the both end openings 10a and 10b of the outer tube 10. The outer tube 10 and the plug body 14 are fixed by this.

More specifically, plug 14 is reduced in diameter from outer plug 20 having the same outer diameter as outer tube 10 in a step-like manner from outer plug 20, and is integrally connected and inserted into the outer tube and inserted into inner wall 10c. And an inner plug portion 22 closely fitted. The outer plug portion 20 is a portion that seals the both end openings 10a and 10b of the outer tube 10, and is externally applied to the both end openings 10a and 10b to be in close contact with their edges. The inner plug portion 22 is formed of a solid cylindrical body having a certain axial height which is inserted into the inner wall surface of the outer tube 10 in a fitting manner, and in the embodiment, the inner plug portion 22 receives an external addition. Under pressure, form an elastic seal to secure the seal in the outer tube. The outer plug portion 20 and the inner plug portion 22 are connected by a concentric solid cylinder.

In FIGS. 2 and 3, the inner plug portion 22 is provided with elastic sealing means. The elastic sealing means is It is a sealing means for directly sealing the working space s from the outside, and in particular, uses a resilient member to seal the working space by its shape restoring force. In this embodiment, the elastic sealing means includes a first groove 24 circumferentially engraved near the insertion end side of the inner plug portion 22 and an O-ring 26 as an elastic sealing member fitted in the groove. And. As shown in FIG. 2, when the plug 14 is inserted into the outer pipe 10, the O-ring 26 is compressed to maintain the water-tight and airtight state inside and outside of the pipe by its biasing force.

Furthermore, in the present embodiment, the plug body 14 has a concave groove 28 as a second groove which is pressurized from the outside of the outer tube 10 and receives the pressure to receive the concave deformation of the outer tube. It is provided. In the embodiment, the recessed groove 28 is the inner plug portion 22 and is circumferentially formed between the groove 24 and the outer plug portion 20 with a gap. The concave groove is a part that receives concave deformation due to pressure such as caulking from the outside of the outer tube using an instrument or a device, and is used to fix the outer tube to the plug body. The depth may be arbitrarily set as long as the caulking fixed state of the concave deformation portion of the outer pipe and the concave groove is reliable. In this embodiment, the recessed groove 28 is formed as a groove which is uniformly recessed in the circumferential direction and is reed.

Furthermore, the plug body 14 is provided with a through hole 15 through which the inner pipe 12 is communicated. A sealing plug 30 having a hole through which the inner pipe 12 is airtightly inserted is fitted in the through hole 15. Then, the inner pipe 12 is disposed so as to penetrate the inside of the outer pipe 10 in the longitudinal direction in a state of being supported by being penetrated through the hole of the sealing plug 30. Further, an insertion ring 32 is also interposed on the insertion end side of the sealing plug 30 to ensure the airtightness between the through hole 15 of the plug 14 and the inner pipe 12. In the figure, reference numeral 34 denotes a stopper plug for closing the openings at both ends of the outer pipe with a plug 14 to vacuum-suction the inside, and further sealing a hole used when filling a working medium Q such as ammonia, It is fitted after the filling of the working medium to close the inside.

Next, the assembling procedure and operation of the thermal siphon of the embodiment will be described also with reference to FIGS. 5 to 8. First, the hollow tube of the outer tube 10 is passed through the inner tube 12 in the longitudinal direction. . In this state, the plug bodies 14A and 14B are inserted into the inner pipe 12 from both ends through the sealing plug 30 from the both end openings 10a and 10b of the outer pipe 10, respectively. Then, each plug body 14 having the O-ring 26 mounted in the groove 24 is pushed into the outer plug portion 20 and the step portion 21 of the inner plug portion 22 from the openings at both ends of the outer pipe 10 to insert and engage (Fig. 5 , See Figure 6). By this, outside The working space s between the pipe and the inner pipe is sealed airtight and watertight. In this state, a portion corresponding to the outer tube concave deformation receiving groove 28 of the inner plug portion 22 inside the outer tube surface marked in advance is opposed by using a sandwich pressure device or the like (not shown). Apply pressure so as to clamp from P2 (see Fig. 7 and Fig. 8), and deform a part of the outer tube into a concave shape. As a result, the concave deformation portion 101 of the outer tube intrudes into the receiving groove 28 on the lower side thereof, and the plug 14 and the outer tube 10 are firmly fixed. As described above, when assembling the thermal siphon, the inner pipe 12 is passed through the outer pipe 10, and the plug 1 is fitted from both sides, and then the outer pipe is pinched and pressurized. Seal and fix the inside of the tube. After that, the inside is vacuum-suctioned, and then the working medium Q such as alcohol is filled and sealed with the stopper 34 to complete the assembly. The working fluid Q filled in the working space S is a working fluid that performs heat transfer while performing phase change between the evaporation part and the condensation part of the enclosed space. In use, for example, by supplying the heat source fluid M to the inner tube 12, heat is applied with the central portion of the inner tube 12 as an application source, and is transmitted to the outside of the thermal siphon to heat the surroundings; In the case of supplying the refrigerant into the inner pipe 12, the periphery of the thermal siphon is cooled in the process of heat transfer while the operating fluid condensed by the heat receiving in the outer pipe condenses on the surface of the inner pipe. In addition, the pressure and caulking of the outer pipe may be caulked at four places or other multiple places which are only two places.

As described above, in this embodiment, with the inner pipe 12 penetrating in the longitudinal direction in the outer pipe 10, the plug 14 is fitted and assembled from both sides of the outer pipe, and the upper surface thereof is mounted on the upper surface thereof. Since the plug body 14 is formed of a solid short cylindrical body having an outer diameter size which is in contact with the outer surface of the outer tube 10 simultaneously with the outer surface of the outer tube 10 when one flat surface such as the heat transfer plate 18 is placed. A thermal siphon is constructed like a single cylinder of one outer diameter, and thus, for floor heating, for example when laying on the underside of a heat transfer plate at the bottom of a flooring, A rectangular contact surface including the surface of the heat plate and one tangent line is obtained, and heat can be well transferred without causing heat transfer loss, and floor formation can be effectively prevented. Also, at that time, by providing elastic sealing means or outer tube concave deformation receiving recessed groove in the plug body, it is possible to cut off the large diameter metal bar material simply by giving a slight groove processing. Because it is good, material yield can be significantly improved.

Note that the outer tube concave deformation receiving groove 28 should be formed circumferentially as shown in FIGS. 9-1 and 9-12. Instead, they may be provided only at two opposing locations, or as shown in Fig. 10-1 and Fig. 10-2, they may be formed with grooves in only four locations facing each other.

Industrial applicability

The thermal siphon according to the present invention and the method for producing the same are not limited to the above-described embodiment, and modifications within the scope of the subject matter of the invention described in the claims are also included in the present invention. For example, the working medium may be alcohol, water, acetone, freon, nitrogen or any other working fluid. If materials such as outer tube, inner tube, plug body, etc. are not limited to aluminum, stainless steel, copper, nickel, tungsten, titanium or any other stable material that does not cause deterioration due to reaction with the working medium is selected. Good. Further, the heat source fluid may be used as a cold heat transfer device which may be a cold heat source fluid such as cold water. Furthermore, it can also be used for other air conditioning and floor heating applications, for thermal insulation around cultivations of agricultural plants, for soil remediation, for drying of wood and other appropriate heat transfer means.

Claims

The scope of the claims

[1] The inner pipe is disposed longitudinally through the outer pipe arranged horizontally and having both end openings sealed by the plug body so that the working fluid is enclosed in the vacuum operating space between the outer pipe and the inner pipe, and the inner pipe A dual-tube thermal siphon that performs heat exchange with the outer tube outer area while flowing heat source fluid into the inside of the inner tube, and the outer tube and the plug are in contact with one plane simultaneously placed on the upper outer surface. A thermal siphon characterized in that it is formed of the same outer diameter and size.

[2] The outer pipe and the plug are fixed by the external pressure applied to the outer pipe by the external pressurizing means in a state in which the plug is fitted in the both end openings of the outer pipe. The thermal siphon of 1 description.

[3] The thermal siphon according to claim 1 or 2, characterized in that each open end of the outer tube and each plug body are sealed by an elastic sealing means.

[4] The thermal siphon according to claim 1 or 2, wherein the plug body is provided with a concave groove which receives pressure from the external pressure means and receives concave deformation of the outer tube.

[5] The plug body includes an outer plug portion having the same outer diameter as the outer pipe, and an inner plug portion which is diameter-reduced from the outer plug portion in a step-like manner and integrally connected and inserted into and fitted to the inner wall of the outer pipe. ,

The thermal siphon according to claim 3 or 4, wherein a groove for mounting an elastic sealing member and a concave groove for receiving the outer tube concave deformation are formed in an inner plug portion.

[6] An outer plug having the same outer diameter as the outer pipe, and an inner plug integrally connected to the outer plug and engaged with the inner wall of the outer pipe, and the groove for attaching the elastic sealing member in the inner plug Form a recessed groove for receiving the outer tube concave deformation, and further prepare a plug in which the inner tube through hole is opened,

With the elastic sealing member mounted on the elastic sealing member mounting groove of the inner plug section while arranging the inner pipe through the outer pipe in the longitudinal direction, the openings at both ends of the outer pipe are sealed with a plug to Allow the hydraulic fluid to be enclosed in the space with the inner pipe,

The outer tube and the plug are integrated by pressing the outer surface of the outer tube in a portion corresponding to the outer tube concave deformation receiving groove while the plug is fitted in the both end openings of the outer tube. A method of manufacturing a thermal siphon, characterized in that it is fixed to