WO2015075913A1

WO2015075913A1 - Heat radiation pipe

Info

Publication number: WO2015075913A1
Application number: PCT/JP2014/005706
Authority: WO
Inventors: 好史大良
Original assignee: 好史大良
Priority date: 2013-11-20
Filing date: 2014-11-13
Publication date: 2015-05-28
Also published as: JP6095554B2; CN105705868A; JP2015098991A; KR20160075619A

Abstract

The present invention pertains to a heat radiation pipe used in residential floor heating, agricultural house heating, etc., and provides a heat radiation pipe having excellent durability at a low price. The present invention has: an extrusion-molded double-layer pipe (10) having an outer pipe (11), an inner pipe (12) disposed inside the outer pipe so that a space is left between the inner pipe and the outer pipe (11), and support plates (13) that widen in the longitudinal direction and the radial direction, the support plates (13) connecting the outer pipe (11) and the inner pipe (12), supporting the inner pipe (12), and being provided at multiple locations in the circumferential direction; and a pair of end plates (20) for sealing the interior space interposed between the outer pipe (11) and the inner pipe (12) and allowing the end sections of the inner pipe (12) or a pipe (121) connected to the inner pipe (12) to protrude at both ends of the double-layer pipe (10).

Description

Heat dissipation pipe

The present invention relates to a heat radiating pipe used for floor heating of a house or heating of an agricultural house.

Conventionally, thermosyphons have been used for the above applications (see Patent Documents 1 to 3). The thermosyphon has a structure in which the inner cylinder is penetrated so as to pass a lower position of the outer cylinder in a state of being laid down, and the working fluid is sealed in a space between the outer cylinder and the inner cylinder. When hot water is passed through the inner cylinder of the thermosyphon, the working liquid evaporates by the heat, and the upper part of the inner surface of the outer cylinder is warmed and condensed by the steam, and falls down into the working liquid. In this way, the outer cylinder is warmed, and heat is transferred from the outer cylinder to the floor of the house, an agricultural house, or the like.

JP 2004-101039 A JP 2005-48995 A JP 2005-42939 A

However, many of the thermosyphons used in the above applications employ a packing such as an O-ring between the plate that closes both ends of the pipe and the inner wall of the outer cylinder or the outer wall of the inner cylinder. May cause leakage of the internal working fluid. A packing such as an O-ring has a relatively short life, requires maintenance such as replacement of the packing and refilling of the hydraulic fluid, and requires a running cost.

In view of the above circumstances, an object of the present invention is to provide a heat radiation pipe that is inexpensive and excellent in durability.

The heat dissipating pipe of the present invention that achieves the above object is as follows.
Multiple locations in the circumferential direction that support the inner wall by connecting the outer tube and the inner tube with the inner tube disposed in the outer tube with a space between the outer tube and the outer tube, and extending in the longitudinal direction and the radial direction A double pipe made through extrusion, having a support plate provided on
Each end of the double pipe has a pair of end plates that project the inner pipe or the pipe connected to the inner pipe and close the inner space sandwiched between the outer pipe and the inner wall.

¡The heat radiating pipe of the present invention does not require a hydraulic fluid such as a thermosyphon. Therefore, there is no risk that the hydraulic fluid leaks out in the first place. Moreover, the heat radiating pipe of the present invention includes the double pipe and a pair of end plates, and does not require packing such as an O-ring. Therefore, high durability and long life are realized.

In addition, when working fluid is used, the posture of the pipe becomes a problem. However, in the case of the heat radiating pipe of the present invention, it is only necessary to flow smoothly when, for example, hot water is flowed into the inner pipe, and thus the posture is a serious problem. In addition to being placed horizontally on the floor, it may also be arranged vertically or diagonally to the wall.

Furthermore, in the case of the heat radiating pipe of the present invention, the above-mentioned double pipe extruded is used and can be manufactured at low cost.

Furthermore, in the case of the heat radiating pipe of the present invention, the heat of the hot water when, for example, hot water is passed through the inner pipe is transferred to the support plate and the inner space to reach the outer pipe, and the heat of the outer pipe is radiated. For this reason, although it is inferior to the immediate effect of warming the room rapidly compared with the thermosyphon, it is used for the purpose of warming gently over a long period of time, or the entrance side where the hot water flows in and the exit side where it flows out in the room. It is suitable for applications such as heating uniformly.

Also, in the case of the heat transfer pipe of the present invention, the load due to the thermal cycle accompanying operation and stop is different from the thermosyphon where the load is concentrated on the packing such as the O-ring, and the load is almost equally distributed to the entire heat radiating pipe. This also contributes to high durability and long life of the heat radiating pipe of the present invention.

Furthermore, according to the heat radiating pipe of the present invention, there is no critical thing such as the evaporation temperature of the hydraulic fluid, and the temperature for warming the room can be easily adjusted by adjusting the temperature and flow rate of hot water passing through the inner pipe. can do.

Here, in the heat radiating pipe of the present invention, the inner tube is preferably arranged concentrically with the outer tube.

When the inner pipe is arranged concentrically with the outer pipe, the heat distortion caused by passing hot water through the inner pipe is equally received by the support plate and the outer pipe, which is favorable in terms of strength and contributes to longer life. . Also, heat conduction is made uniform.

Furthermore, in the heat radiating pipe of the present invention, the plurality of support plates are preferably formed at equal intervals in the circumferential direction.

形成 By forming the support plate at equal intervals in the circumferential direction, heat distortion is evenly distributed and heat transfer is also equalized.

Further, in the heat radiating pipe of the present invention, the support plate has a notch that connects the internal space into one at least at one end, and each of the pair of end plates includes an outer tube and an inner tube or the inner tube. It is preferable that both the pipe and the pipe connected to each other are integrated by welding, and an inert gas is sealed in the internal space.

The internal space can be sealed by integrating the pair of end plates by welding, and the entire heat radiating pipe is integrated to form a strong structure. Moreover, when the inert gas in the internal space is sealed, the heat transfer characteristics are adjusted according to the thermal conductivity of the inert gas.

In addition, by forming the above-mentioned notch in the support plate and connecting the internal space into one, the occurrence of pressure distribution is avoided, the uniformity of pressure and heat transfer is ensured, and distortion of this heat radiating pipe is generated Is also eased.

Furthermore, in the heat dissipating pipe of the present invention, at least one end plate of the pair of end plates has a hole connecting the internal space and the outside, and the internal space is sealed by press-fitting a plug into the hole. It is also a preferred embodiment.

If this structure is adopted, an inert gas can be injected into the interior, or the pressure in the interior space can be adjusted, and then the interior space can be easily sealed.

Here, when the end plate provided with the hole is employed, the hole is preferably formed by using a friction cutting tool.

The above holes are blocked by the press-fitting of the stopper, but a certain length (depth) of the hole is necessary for the inserted stopper to keep blocking the hole stably for a long period of time. If an attempt is made to secure the length (depth) of the hole only by the thickness of the end plate, it may be necessary to employ a thick end plate only to ensure the length (depth) of the hole. . On the other hand, when a hole is drilled using a friction cutting tool, for example, a flow drill (registered trademark), the wall around the hole becomes a shape extending in the length direction (depth direction) of the hole, exceeding the plate thickness. A hole having a length (depth) is formed. Therefore, when a hole is drilled using a friction cutting tool, a hole with the required length (depth) can be formed, and an end plate with a thinner plate thickness can be used, realizing a cheaper and lighter heat radiating pipe. To do.

In addition, it is also a preferred form that the pair of end plates is produced through extrusion molding and cutting to a predetermined thickness.

The end plate must have a hole for projecting the inner tube or a tube connected to the inner tube. In forming this hole, the plate material may be perforated, but through extrusion molding and cutting to a predetermined thickness, the perforating process becomes unnecessary and a more inexpensive heat radiating pipe is realized.

In addition, about the hole into which the above-mentioned plug is press-fitted, it may be formed at the time of extrusion molding, or may be drilled using the above-mentioned friction cutting tool after cutting in order to obtain an end plate with a thin plate pressure. .

According to the present invention described above, a heat radiating pipe having low cost and excellent durability is realized.

It is sectional drawing of the thermal radiation pipe of 1st Embodiment of this invention. It is the expanded sectional view (A) and side view (B) of one edge part of the heat radiating pipe of 1st Embodiment which shows sectional drawing in FIG. FIG. 2 is a cross-sectional view of the heat radiating pipe of the first embodiment of the present invention in the direction of arrow AA shown in FIG. It is the expanded sectional view (A) and side view (B) of one edge part of the thermal radiation pipe of 2nd Embodiment of this invention. It is sectional drawing of the thermal radiation pipe of 3rd Embodiment of this invention. It is sectional drawing of the thermal radiation pipe of 4th Embodiment of this invention. It is sectional drawing which showed one edge part of the thermal radiation pipe of 5th Embodiment of this invention. It is sectional drawing of the location corresponding to arrow AA shown in FIG. 1 of the heat radiating pipe of 6th Embodiment of this invention. It is sectional drawing of the location corresponding to arrow AA shown in FIG. 1 of the thermal radiation pipe of 7th Embodiment of this invention. It is sectional drawing of the location corresponding to arrow AA shown in FIG. 1 of the thermal radiation pipe of 8th Embodiment of this invention. It is sectional drawing of the location corresponding to arrow AA shown in FIG. 1 of the thermal radiation pipe of 9th Embodiment of this invention. It is sectional drawing of the location corresponding to arrow AA shown in FIG. 1 of the thermal radiation pipe of 10th Embodiment of this invention.

FIG. 1 is a sectional view of a heat radiating pipe according to a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view (A) and a side view (B) of one end portion of the heat radiating pipe of the first embodiment whose sectional view is shown in FIG.

FIG. 3 is a cross-sectional view of the heat radiating pipe according to the first embodiment of the present invention in the direction of arrow AA shown in FIG.

In the heat radiating pipe 1 of the present embodiment, a double tube 10 having a cross-sectional shape shown in FIG. 3 manufactured by extrusion molding of metal, for example, aluminum is used. The double tube 10 includes an outer tube 11, an inner tube 12, and a support plate 13. The outer tube 11 is a pipe having a circular cross section in the present embodiment. The inner tube 12 is disposed with a space between the inner tube 12 and the outer tube 11.

In the present embodiment, the inner tube 12 is disposed concentrically with the outer tube 11. The support plate 13 extends in the longitudinal direction (arrow XX direction shown in FIG. 1) and the radial direction (radial direction from the inner tube 12 toward the outer tube 11 as indicated by the arrow Y in FIG. 3). And a flat plate that supports the inner tube 12 by connecting the inner tube 12 and the inner tube 12. The support plate 13 is formed at a plurality of locations in the circumferential direction (the direction of the arrow R shown in FIG. 3). In the present embodiment, the support plate 13 is formed at three locations at equal intervals of 120 ° in the circumferential direction (arrow R direction).

The support plate 131 has notches 131 formed at both ends thereof. As shown in FIG. 3, the present embodiment includes three support plates 13, and the notches 131 are formed in all of the three support plates 13.

In FIG. 3, the internal space 19 is shown as being divided into three, but the notch 131 of the support plate 13 connects the spaces on both sides separated by the support plate 13, and three Since the notches 131 are formed in all of the support plates 13, the internal space 19 is a space connected to one through the notches 131.

In addition to the double pipe 10, the heat radiating pipe 1 includes a pair of end plates 20 that block the internal space 19 sandwiched between the outer pipe 11 and the inner pipe 12 at both ends of the double pipe 10. Have. In the present embodiment, the end plate 20 is also made of aluminum like the double tube 10.

In the first embodiment shown here, the connecting pipe 121 is connected to the inner pipe 12 so that the connecting pipe 121 is strongly inserted into the end of the inner pipe 12, and the connecting portion is the central hole 23 of the end plate 20. And the connecting pipe 121 protrudes outside. A hose (not shown) is connected to the connecting pipe 121. In the middle of the connecting pipe 121, as shown in FIG. 2 (A), the connecting pipe 121 is prevented from being detached when inserted into the hose. Protrusion 121a is provided. This connecting pipe 121 is also made of aluminum of the same material in this embodiment. The end plate 20 is welded to both the inner tube 12 and the outer tube over the entire circumference.

One of the pair of end plates 20 (the right end plate 20 in FIG. 1 shown in FIG. 2A) has a hole 21 that connects the internal space 19 and the outside.

In this embodiment, first, the air in the internal space 19 is extracted by using the holes 21 to make the internal space 19 in a vacuum state, and an inert gas, typically helium gas, is injected into the internal space 19. Thereafter, the hard ball 22 is driven into the hole 21, the hard ball 22 is press-fitted into the hole 21, and the hole 21 is closed in a sealed state. Here, stainless steel hard balls are used as the hard balls 22. The hard sphere 22 corresponds to an example of a stopper according to the present invention.

As described above, a hose (not shown) is connected to the connecting pipes 121 protruding from both ends of the heat radiating pipe 1, and warm water flows into the inner pipe 12 of the heat radiating pipe 1 through the hose. It is discharged from the end. The discharged water is reheated by a heating device (not shown) and flows into the inner pipe 12 of the heat radiating pipe 1.

The heat of the hot water flowing into the inner pipe 12 is transferred from the inner pipe 12 to the outer pipe 11 via the support plate 13. Further, even if the inner tube 12 warms the inert gas in the inner space 19 and the inert gas is heated, the heat is transferred to the outer tube 11.

The outer tube 11 heated in this way dissipates the heat to the outside.

In manufacturing the heat radiating pipe 1, the double pipe 10 is cut at a position indicated by a one-dot chain line in FIG. Then, the outer tube 11 is shaved to the position of the solid line shown with the inner tube 12 left, and the notch 131 shown in the figure is formed in the support plate 13. Then, a separately prepared connecting pipe 121 is press-fitted into the inner pipe 12, and an end plate 20 which is also separately prepared is fitted into the outer pipe 11 and the inner pipe 12. And the internal space 19 is evacuated using the hole 21 of the end plate 20, and it confirms that there is no leakage by a pinhole. When this confirmation is completed, the inner space 19 is filled with an inert gas such as helium gas. Then, a hard ball 22 is driven into the hole 21 of the end plate 20, the hard ball 22 is press-fitted into the hole 21, and the hole 21 is also sealed. Thereby, this heat radiating pipe 1 is completed.

Here, the location indicated by the symbol w in FIG. 1 and FIG. 2 represents a welding location over one round. Here, of the both ends of the heat radiating pipe 1, the sign w is shown only at the welded portion at one end, but the same applies to both ends.

The same applies to the symbol w shown in each figure after FIG. 4 described below.

FIG. 4 is an enlarged cross-sectional view (A) and a side view (B) of one end portion of the heat radiating pipe according to the second embodiment of the present invention.

Here, the same constituent elements as those of the heat radiating pipe 1 of the first embodiment described above are denoted by the same reference numerals as those in the drawings of the first embodiment. The difference will be mainly described. About the point which abbreviate | omitted description here, it is the same as the above-mentioned 1st Embodiment.

The heat radiating pipe 2 of the second embodiment shown in FIG. 4 has an extruded double tube 10 and a pair of end plates 20, similar to the heat radiating pipe 1 of the first embodiment described above.

In the production of the heat radiating pipe 2 of the second embodiment, the double pipe 10 is cut at the position indicated by the alternate long and short dash line in FIG. 4A, leaving the inner pipe 12 and the outer pipe 11 and the support plate 13. Is cut to the position indicated by the solid line in FIG. Therefore, the connecting pipe 121 like the heat radiating pipe 1 of the first embodiment is unnecessary, the end of the inner pipe 12 serves as the connecting pipe, and the inner pipe is directly inserted into a hose (not shown). It is. For this reason, a protrusion 12a for preventing the hose from coming off is formed on the inner tube 12.

According to the heat radiating pipe 2 of the second embodiment, compared with the heat radiating pipe 1 of the first embodiment, the portion of the end of the double pipe 10 is scraped off, but a connecting pipe 121 is prepared separately and the connecting pipe 121 is prepared. The step of press-fitting into the inner tube 12 becomes unnecessary.

FIG. 5 is a cross-sectional view of a heat radiating pipe according to a third embodiment of the present invention.

As in the case of the second embodiment described above, in the third embodiment and various embodiments described later, the same components as those of the heat radiating pipe 1 of the first embodiment described above are used in the first embodiment. The same reference numerals as those used in the respective drawings of the embodiments are attached and shown, and differences from the first embodiment will be mainly described. About the point which abbreviate | omitted description, it is the same as the above-mentioned 1st Embodiment.

In the support plate 13 of the heat radiating pipe 3 of the third embodiment, a notch 131 is formed only at one end (the right end in FIG. 5). Further, the notch 131 in the third embodiment is different in shape from the notch 131 in the first embodiment. However, also in the heat radiating pipe 3 of this third embodiment, the notches 131 are formed in all the support plates 13. The role of the notch 131 is to connect the internal spaces 19 into one, and as long as it is formed in all the support plates 13, it may be formed only in one end.

Further, in the heat radiating pipe 3 of the third embodiment shown in FIG. 5, the connecting pipe 121 has a thickness that substantially matches the inner diameter of the inner pipe 12 and is inserted into the inner pipe 12 with a light force. It is a tube that can.

In manufacturing the heat radiating pipe 3, the double pipe 10 is cut at the position of arrow B to form a notch 131. Then, the connecting pipe 121 is inserted through the end plate 20, and the connecting pipe 121 is further inserted into the inner pipe 12. The end plate 20 is separated from the position of the arrow B, and the end portion of the inner tube 12 and the outer wall of the connecting tube 121 are welded over the entire circumference. Next, the end plate 20 is applied to the end surface of the double pipe 10, and the end plate 20 and the outer pipe 11 and the connecting pipe 121 are welded over the entire circumference. Thereafter, as in the first embodiment, the air inside is extracted and an inert gas is injected, and hard balls 22 are driven into the holes 21 of the end plate 20 and sealed.

According to the heat radiating pipe 3 of the third embodiment, the support plate 13 is notched after the double pipe 10 is cut, such as the

heat radiating pipes

1 and 2 of the first and second embodiments described above. The work of cutting the outer tube 11 and the support plate 13 other than forming 131 is unnecessary, and a more inexpensive heat radiating pipe is realized.

FIG. 6 is a cross-sectional view of a heat radiating pipe according to a fourth embodiment of the present invention.

As in the heat radiating pipe 3 of the third embodiment shown in FIG. 5, the support plate 13 of the heat radiating pipe 4 of the fourth embodiment shown in FIG. 6 has a notch 131 formed only at one end.

In the case of the heat radiating pipe 4 of the fourth embodiment, the inner tube 12 protrudes from the end plate 20 in the same manner as the heat radiating pipe 1 of the first embodiment. However, the connecting pipe 121 has a thickness that can be easily inserted into the inner pipe 2 as in the case of the third embodiment shown in FIG.

In manufacturing the heat radiating pipe 4, the double pipe 10 is cut at a position similar to the position indicated by the one-dot chain line in FIG. 2, and the outer pipe 11 and the support plate 13 are shown in FIG. Sharpen to position. Then, a notch 131 is formed in the support plate 13. Thereafter, as shown in FIG. 6, the end of the inner tube 12 is inserted into the center hole 23 of the end plate 20, and the end plate 20 is directed to the end surface of the double tube 10, and the end plate 20 and the outer tube 11 and the inner pipe 12 are welded over one round. Next, the connecting pipe 121 is inserted into the inner pipe 12 as shown in FIG. 6, and the end surface of the inner pipe 12 and the outer wall of the connecting pipe 121 are welded. After that, as in the case of the first embodiment, the air in the internal space 19 is evacuated and filled with an inert gas, and a hard ball 22 is driven into the hole 21 of the end plate 20 and sealed.

Here, in the case of the heat radiating pipe of the fourth embodiment, holes 21 are formed in both end plates 20 at both ends, and hard balls 22 are press-fitted into both holes 21. This is because the end plate 20 is manufactured through extrusion. That is, the end plate 20 has an outer diameter that is substantially the same as that of the outer tube 11 and is formed with, for example, aluminum in a state where both a central hole 23 through which the inner tube 12 is inserted and a hole 21 into which the hard ball 22 is press-fitted are formed. It is manufactured by manufacturing an extruded product and cutting it into an end plate 20 having a thickness shown in FIG. Here, since the end plates 20 manufactured by this manufacturing method are used at both ends of the double tube 10, holes 21 are formed in both end plates 20, and hard balls 22 are press-fitted into both holes 21.

In the case of the heat radiating pipe 4 according to the fourth embodiment, as described above, by using the end plate 20 manufactured through extrusion molding and cutting, the cost of the end plate 20 is suppressed, and the heat radiating pipe is further inexpensive. .

Here, the end plates 20 in which the holes 21 are formed are used at both ends of the double tube 10, but the holes 21 are not formed at the time of extrusion molding, but are formed by drilling after cutting. The hole 21 may be formed only in the end plate 20 at one end of the heavy tube 10. Alternatively, when a large number of heat radiating pipes are manufactured, the end plate 20 in which the holes 21 are formed is formed as a double pipe by manufacturing both an extruded product provided with the holes 21 and an extruded product without the holes 21. It is also possible to employ an end plate 20 that is employed only at one end of 10 and has no holes 21 at the other end.

FIG. 7 is a cross-sectional view showing one end of a heat radiating pipe according to a fifth embodiment of the present invention. The heat radiating pipe 5 of the fifth embodiment is the same as the heat radiating pipe 4 of the fourth embodiment shown in FIG. 6 except for the points described below.

The end plate 20 of the heat dissipating pipe 5 of the fifth embodiment shown in FIG. 7 is made of a thin plate material compared to the heat dissipating pipes 1 to 4 of the respective embodiments so far. For this reason, if the hole 21 has only the length (depth) of the thickness of the plate material, the hard ball 22 cannot be stably driven into the hole 21, and the internal space 19 is sealed by press-fitting the hard ball 22. It is not possible to obtain sufficient reliability. Therefore, as the end plate 20 of the heat radiating pipe 5 according to the fifth embodiment, a plate material in which a hole 21 is formed using a friction drilling tool such as a flow drill (registered trademark) is used. When the friction cutting tool is used, the material of the plate material in which the hole 21 is formed is melted to form a cylindrical protrusion 221 that extends the hole 21, and thereby a hole having a length (depth) exceeding the thickness of the plate material. The end plate 20 has 21. In the present embodiment, this is utilized, and the internal space is sealed with high reliability by press-fitting hard balls 22 into the holes 21 in spite of the thin plate material.

In the case of the heat radiating pipe 5 of the present embodiment, a thin plate material can be used as the end plate 20 as compared with the previous embodiments, and the heat radiating pipe can be made cheaper and lighter without reducing reliability.

The cylindrical protrusions 221 around the holes 21 are formed on both surfaces of the plate material. However, when the protrusions on the outer wall surface are obstructive, the protrusions on the outer wall surface may be scraped off. When cutting the projection on the outer wall surface side, drilling may be performed using a friction cutting tool designed to scrape the projection on the outer wall surface side simultaneously with the formation of the hole 21.

FIG. 8 is a cross-sectional view of a portion corresponding to the arrow AA shown in FIG. 1 of the heat radiating pipe according to the sixth embodiment of the present invention.

Each embodiment after the sixth embodiment described here is characterized by the structure of a double tube, and the illustration and description of the entire structure are omitted. The entire heat radiating pipe is manufactured in the same manner as in any of the above-described embodiments except for the difference in the structure of the double pipe.

In each of the sixth and subsequent embodiments, the same components as those in the embodiments described so far are described with the same reference numerals even if there are differences in shape and the like. To do.

The double pipe 10A constituting the heat radiating pipe 6 of the sixth embodiment shown in FIG. 8 includes the outer pipe 11, the inner pipe 12 and the support plate 13 in the same manner as the double pipe 10 of the previous embodiments. Have. However, a groove 11a extending in the longitudinal direction of the double pipe 10A is formed on the outer wall surface of the outer pipe 11 where the support plate 13 is connected.

In the case of the heat radiating pipe according to the above-described embodiment, the outer wall surface of the outer tube 11 of the double tube 10 is cylindrical, and the orientation in the circulation direction is unknown in appearance. On the other hand, in the case of the heat radiating pipe 6 of the sixth embodiment shown in FIG. 8, the groove 11 a is formed at a location corresponding to the support plate 13 on the outer wall surface. Can know.

If this heat radiating pipe 6 is laid sideways in a posture in which the groove 11a faces upward and a flooring is placed thereon, even if this heat radiating pipe 6 expands and contracts due to a thermal cycle, the expansion and contraction works equally to the left and right. The flooring does not need to be moved left and right. If the heat radiating pipe 6 is placed so that the partition wall 13 has an uneven posture on the left and right and a flooring is laid thereon, the flooring may move left and right due to expansion and contraction of the heat radiating pipe 6.

FIG. 9 is a cross-sectional view of a portion corresponding to the arrow AA shown in FIG. 1 of the heat radiating pipe according to the seventh embodiment of the present invention.

The double pipe 10B constituting the heat radiating pipe 7 of the seventh embodiment has an outer pipe 11, an inner pipe 12, and three support plates 13 as in the embodiments described so far. However, the outer tube 11 has flat portions 11 b formed in a plane at three locations corresponding to the support plate 13.

In FIG. 9, the flooring 50 is shown by a one-dot chain line.

For example, in the case of a structure in which the heat radiating pipe 7 is placed horizontally and the floor material 50 is placed thereon to transmit heat to the floor material 50, the presence of the flat portion 11b makes it possible to compare the floor on the floor. The material 50 is stabilized and the heat transfer to the floor material 50 is improved.

FIG. 10 is a cross-sectional view of a portion corresponding to the arrow AA shown in FIG. 1 of the heat radiating pipe according to the eighth embodiment of the present invention.

In the case of the embodiment described so far, the support plate 13 constituting the double pipe is three, but in the case of the heat radiation pipe 8 of the eighth embodiment shown in FIG. The four support plates 13 are provided at equal intervals of 90 ° in the circumferential direction.

As described above, the number of the support plates 13 may be an appropriate number in consideration of the strength and heat transfer performance of the heat radiating pipe, and the number is not limited.

FIG. 11 is a cross-sectional view of a portion corresponding to the arrow AA shown in FIG. 1 of the heat radiating pipe according to the ninth embodiment of the present invention.

The outer pipe of the double pipe 10D constituting the heat radiating pipe 9 of the ninth embodiment is a pipe having an elliptical cross section. For example, when installing the heat radiating pipe along the wall surface of the room, it is better that the amount of protrusion from the wall surface is small. In such a case, as shown in FIG. It is preferable to use the heat radiating pipe 9.

In addition, the heat radiating pipe 9 shown in FIG. 11 has two support plates 13.

FIG. 12 is a cross-sectional view of a portion corresponding to the arrow AA shown in FIG. 1 of the heat radiating pipe according to the tenth embodiment of the present invention.

12, the heat radiating pipe 91 of the tenth embodiment shown in FIG. 12 is also formed with an outer tube 11 of a double tube 10E having an oval shape, similar to the heat radiating pipe 9 of the ninth embodiment shown in FIG.

Further, in the heat radiating pipe 91 of the tenth embodiment, a total of four support plates 13 are arranged near the elliptical minor axis. For this reason, the heat radiating pipe 91 of the tenth embodiment can withstand the force of the direction of crushing in the minor axis direction, compared to the heat radiating pipe 9 of the ninth embodiment of FIG. It is advantageous for installation in places where it is strongly pinched.

Here, various structures of the double pipe constituting the heat radiating pipe have been described. However, these are merely examples, and are manufactured by extrusion molding, which includes the outer pipe 11, the inner pipe 12, and a plurality of support plates 13. If it is a double tube that can be used, its specific structure is not questioned.

In addition, here, the heat radiating pipe is described as being made of aluminum, but it is not necessarily made of aluminum, and may be other metals, and is not particularly limited as long as it is a material according to its use. Absent.

Furthermore, here, the internal space 19 has been described as being filled with an inert gas such as helium gas, but instead of being filled with an inert gas, air may be left as it is in the internal space. When air is left at atmospheric pressure, the end plate 20 does not need to have a role of sealing the inside, and there may be some air flow between the internal space 19 and the outside.

1, 2, 3, 4, 5, 6, 7, 8, 9, 91

Radiation pipe

10, 10A, 10B, 10C, 10D, 10E Double pipe 11 Outer pipe 11a Groove 11b Flat part 12 Inner pipe 12a Projection 13 Support Plate 19 Internal space 20

End plate

21, 23 Hole 22 Hard ball 50 Floor material 121 Connecting pipe 121a Protrusion 131 Notch 211 Protrusion w Welding location

Claims

A space between the outer tube and the outer tube, an inner tube disposed in the outer tube, and the longitudinally and radially extending direction connecting the outer tube and the inner tube to support the inner wall; A double pipe made through extrusion, having support plates provided at multiple locations in the circumferential direction;
Each end of the double pipe has a pair of end plates that project the inner pipe or a pipe connected to the inner pipe and close an internal space sandwiched between the outer pipe and the inner wall. And heat dissipation pipe.
The heat radiating pipe according to claim 1, wherein the inner pipe is disposed concentrically with the outer pipe.
The heat radiating pipe according to claim 1 or 2, wherein the support plates are provided at equal intervals in the circumferential direction.
The support plate has a notch connecting the internal space into one at least at one end;
Each of the pair of end plates is integrated by welding to both the outer tube and the inner tube or a tube connected to the inner tube,
The heat radiating pipe according to any one of claims 1 to 3, wherein an inert gas is sealed in the internal space.
At least one of the pair of end plates has a hole connecting the internal space and the outside, and the internal space is sealed by press-fitting a plug into the hole. The heat radiating pipe according to any one of claims 1 to 4.
The heat radiating pipe according to claim 5, wherein the hole is formed by using a friction cutting tool.
The heat radiating pipe according to any one of claims 1 to 6, wherein the pair of end plates are manufactured by extrusion molding and cutting to a predetermined thickness.