JP2002054885A - Pipe body for heat exchange - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe body for heat exchange which can be installed within a three-dimensional installation space, and also is excellent in heat exchange efficiency. SOLUTION: This is a pipe body A for heat exchange which has a spiral section Aa consisting of a pipe 10 used for heat exchange between fluid guided inside and outside gas or fluid, and the adjacent parts of the pipe 10 constituting the above spiral section Aa are separated from each other, and for the pipe 10 of the above spiral section Aa, at least, in the above pipe body A for heat exchange, the dimension x of the pipe in the direction of a segment t-t which connects the inside of the curve of that pipe 10 with the outside 10b of the curve is made larger than the width y of the pipe in the direction orthogonal to the direction of the line segment t-t which connects the inside 10 of this curve with the outside 10b of the curve.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tube used for heat exchange, and more particularly, to a heat exchange tube capable of effectively exchanging heat in a relatively small installation space.

[0002]

2. Description of the Related Art Heat exchange between a fluid guided in a heat exchange tube and a gas or liquid outside the tube cools or heats the fluid guided in the tube, or It is common practice to heat or cool a gas or liquid outside the tube with a fluid guided in the tube.

A tube used as such a heat exchange means is
Usually, round pipe-shaped pipes are provided in parallel on the same surface at a predetermined interval, and the respective pipe ends are connected by a U-shaped pipe, and arranged as a continuous pipe,
By using this tube, heat was exchanged between a fluid guided inside the tube and a gas or liquid outside the tube.

[0004]

However, in such a conventional pipe, various cooling treatments using a refrigerant guided in the pipe, various heating treatments using a heat medium, and a pipe guided in the pipe are required. It is necessary to arrange the pipes side by side in a planar manner in the cooling process or the heating process of the fluid.
There were specific restrictions on the installation space of this pipe.

[0005] From such a point, for example, the round pipe-shaped pipe is formed into a spiral shape, and the fluid is guided into the spiral-shaped pipe. It was considered to be configured to exchange heat with the liquid.

[0006] However, in an attempt to make such a round pipe-like tube helical and to perform heat exchange between a fluid guided inside the tube and a gas or liquid outside the tube, the helical tube is used. As compared with the ratio of the helical portion of the pipe to the installation space, the pipe had a round pipe shape, so that the heat exchange by the pipe was not satisfactory.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a heat exchange tube which can solve the problem of the tube according to the above-described structure, can be installed in a three-dimensional installation space, and has a good heat exchange efficiency.

[0008]

In order to achieve the above object, the invention according to claim 1 comprises a tube used for heat exchange between a fluid guided inside and an external gas or liquid. A heat exchange tube having a helical portion, wherein mutually adjacent tubes of tubes constituting the helical portion are separated from each other, and at least the helical portion of the tube in the heat exchange tube is The pipe width in the direction of the line segment passing through the inside of the curve and the outside of the curve of the pipe is larger than the tube width in the direction orthogonal to the direction of the line segment passing through the inside of the curve and the outside of the curve. The heat exchange tube is characterized in that:

[0009] The heat exchange tube having the above-mentioned structure is formed in a spiral shape, so that it can be easily and reliably installed in a three-dimensional space.

[0010] In the heat exchange tubes constructed as described above, adjacent tubes of the spirally provided tubes are adjacent to each other with a predetermined space provided therebetween. The tube surface area of each tube can be increased.

Next, in order to achieve the above object, the invention according to claim 2 is replaced by the invention according to claim 1,
The heat exchange tube is characterized in that the tube has a rectangular cross section in a direction perpendicular to the flow direction of the fluid, and has a rectangular shape long in a direction of a curved inside and a curved outside of the tube.

[0012] In the heat exchange tube configured as described above, each of the tubes adjacent to each other is opposed to each other by a plane tube surface that is substantially parallel to each other in accordance with the above-described feature. Thus, an effective heat exchange surface can be formed in a state where the interval between the adjacent pipe surfaces is minimized.

[0013] Then, in order to achieve the above object, the invention of claim 3 is replaced with the invention of claim 1,
The pipe for heat exchange is characterized in that the pipe has a cross-sectional shape orthogonal to a flow direction of the fluid, and has an elliptical shape that is long in a direction of a curved inside and a curved outside of the pipe.

In the heat exchange tube body thus configured, in accordance with the above-mentioned features, the respective tubes are spread in a plane with each other in a state where the inside and outside of each tube are rounded. The tubes are opposed by the curved tube surfaces, and an effective heat exchange surface can be formed in a state where the space between the adjacent tube surfaces is reduced.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, heat exchange tubes A according to typical embodiments of the present invention will be described in detail.

1 to 5 show a heat exchange tube A according to a first embodiment. In FIG. 1, the heat exchange tube A is viewed obliquely from above, and in FIG. Cross-section this,
Further, in FIG. 3, the tubes 10 constituting the heat exchange tube A
FIG. 4 shows a state in which the plurality of heat exchange tubes A are connected in a series so as to be continuous from diagonally above. In FIG. 5, the heat exchange tubes A are mutually connected. The connecting continuous part is shown in cross section. 6 to 8 show a heat exchange tube A according to the second embodiment.
FIG. 7 shows a cross section of the heat exchange tube A viewed obliquely from above, and FIG. 8 shows a cross section of the tube 10 used for the heat exchange tube A. 9 to 11
Fig. 9 shows a heat exchange tube A according to the third embodiment. Fig. 9 shows the heat exchange tube A as viewed from obliquely above, and Fig. 10 shows a cross section of the heat exchange tube A. In FIG. 11,
The tube 10 constituting the heat exchange tube A is shown in cross section.

A typical heat exchange tube A according to this embodiment
Is a tube A for heat exchange having a helical portion Aa composed of a tube 10 used for heat exchange between a fluid guided inside and an external gas or liquid, wherein the helical portion Aa is formed. The adjacent tubes 10 and 10 of the heat exchange tube 10 are separated from each other, and at least the tube 10 of the helical portion Aa in the heat exchange tube A is the curved inside 10 of the tube 10.
a and the pipe width x in the direction of the line segment tt passing through the curved outer side 10b is determined by the pipe width y in the direction orthogonal to the direction of the line segment tt passing through the curved inner side 10a and the curved outer side 10b. Is also enlarged.

Since the heat exchange tube A having such a configuration is formed in a spiral shape, it can be easily and reliably installed in a three-dimensional space.

Further, in the heat exchange tube A constructed as described above, a predetermined space is provided between adjacent tubes 10 of the spirally provided tube 10 so that the adjacent tubes 10 are adjacent to each other. It has the feature that the tube surface area of each of the matching tubes 10 can be increased.

Further, in the heat exchange tube A according to the above-described configuration, the cross section of the tube 10 in a direction perpendicular to the flow direction of the fluid has a cross-sectional shape of the tube 10 between the curved inside 10a and the curved outside 10b. Long rectangular shape.

In the heat exchange tube A constructed as described above, the tubes 10 adjacent to each other are faced to each other by a plane tube surface which is substantially parallel to each other in consideration of the above-mentioned features. As a result, there is a feature that an effective heat exchange surface can be formed in a state where the communication space k between the adjacent pipe surfaces is minimized.

Further, in the heat exchange tube A according to the above configuration, the cross section of the tube 10 in a direction perpendicular to the flow direction of the fluid is changed in a direction between the inside 10a of the tube and the outside 10b of the tube. May have a long elliptical shape.

In the heat exchange tube A constructed as described above, each tube 10 faces each other in a state where the inside and outside of the curve of each tube 10 are rounded in addition to the above features. The pipes face each other by the curved pipe surfaces which spread in a shape, and have a feature that an effective heat exchange surface can be formed in a state where the communication space k between the adjacent pipe faces is reduced.

(1) Heat Exchange Tube A According to First Embodiment First, a heat exchange tube A according to the first embodiment shown in FIGS. 1 to 5 will be specifically described. .

The tube A for heat exchange according to the first embodiment has a helical portion Aa comprising a tube 10 used for heat exchange between a fluid guided inside and a gas or liquid outside. A tube A for heat exchange, wherein adjacent tubes 10 and 10 of the tube 10 constituting the spiral portion Aa are separated from each other, and at least the spiral portion in the tube A for heat exchange. The tube 10 of Aa is
The pipe width x in the direction of the line segment tt passing through the curved inner side 10a and the curved outer side 10b is determined by the pipe width y in the direction orthogonal to the direction of the line segment tt passing through the curved inner side 10a and the curved outer side 10b. Is also a large configuration.

The tube 10 constituting the heat exchange tube A is
At least the tube 10 constituting the helical portion Aa of the heat exchange tube A efficiently exchanges heat between the fluid guided inside the tube 10 and the gas or liquid outside the tube 10. Any material may be used as long as it is made of a material that can be formed. For example, various metal tubes 10 such as an aluminum tube 10, a copper tube 10, and various alloy tubes 10 may be appropriately used. It consists of a tube made of a material.

The tube A for heat exchange according to the example shown in FIG.
The spiral 10 is provided with a spiral portion Aa constituted by a spiral portion Aa. One end of the tube 10 constituting the spiral portion Aa is a connection portion 10c, and the other end is a connection portion 10d. In the tube A for heat exchange according to the illustrated example, each end of the tube 10 constituting the spiral portion Aa, that is, each of the connection portions 10c and 10d is connected to the spiral portion Aa. It is provided to protrude from the side,
In the illustrated example, the connecting portion 10c and the connecting portion 1
0d protrudes outward from the spiral portion Aa along the same virtual plane.

In the illustrated example, the helical portion Aa constituting the heat exchange tube A is formed as a helical shape which is continuously curved with substantially the same curvature. The spiral portion Aa has a substantially cylindrical shape by the pipe 10 to be formed.

The tube 10 constituting such a tube A for heat exchange
The pipe width x in the direction of the line segment tt passing through the curved inner side 10a and the curved outer side 10b in the spiral portion Aa is larger than the pipe width y in the direction orthogonal to the direction of the line segment tt. There is a large configuration. That is, in the illustrated example, the cross-sectional shape of the pipe 10 in the direction perpendicular to the flow direction of the fluid guided through the hole 11 in the pipe 10 is defined by the curved inner side 10a and the curved outer side in the pipe 10 constituting the spiral portion Aa. 10b, the direction of a line segment tt passing therethrough, that is, a rectangular shape long in the radial direction of the cylindrical body formed by the spiral portion Aa,
More specifically, the cross-sectional shape is changed to the inside 10a and outside 10
b, that is, the direction of the line segment tt passing through
Is a flat rectangular shape whose long side is the tube width x in the radial direction of the cylindrical body constituted by the above.

The tube 10 of the helical portion Aa constituting the heat exchange tube A has a cylindrical hole H having a desired diameter in the helical axis direction of the helical portion Aa formed by the tube 10. As described above, the pipes are formed in a spiral shape curved at a predetermined curvature, and the pipes 10 adjacent to each other are separated from each other, that is, the pipes 10 adjacent to each other are formed so as to form a desired communication space k between the pipes 10 adjacent to each other. The tube 10 constituting the helical portion Aa is provided along a chord winding forming a required angle, that is, a line segment parallel to the axis center line of the helical portion Aa at a required angle.

In the helical portion Aa of the heat exchange tube A configured as described above, the tube 10 constituting the helical portion Aa is moved in the flow direction of the fluid guided through the tube 10. The cross-sectional shape in the orthogonal direction is a rectangular shape that is long in the radial direction in the spiral portion Aa formed by the tube 10, and the spiral portion Aa formed by the tube 10 is substantially cylindrical. Thus, the tube surfaces on the tube width x side, which is the long width side, of the tube 10 having a rectangular cross section are opposed to each other, and further, between the opposed tube surfaces on the tube width x side, The spiral part Aa
And a communication space k for making the cylindrical hole H and the outside of the spiral portion Aa communicate with each other. Effective heat exchange is performed on each tube surface of the pipe 10 facing the communication space k. Is made.

Further, since the shorter tube width y side of the tube 10 forming the spiral portion Aa is configured to be along a line parallel to the axis center line of the spiral portion Aa, A large number of tubes 10 along the string winding can be efficiently provided in a required space.

The heat exchange tube A constructed as described above is
A fluid flows into the hole 11 of the tube 10 from one side to the other side of the tube 10 constituting the tube A for heat exchange, and the gas around the spiral portion Aa of the tube A for heat exchange Or it is used for heat exchange with a liquid.

In the heat exchange using the heat exchange tube A, for example, the heat exchange tube A is used, and the heat exchange tube A, in particular, the spiral shape in the heat exchange tube A is used. The gas or liquid on the outer periphery of the portion Aa is heated or cooled.

The heating or cooling of the gas on the outer periphery of the heat exchange tube A using the heat exchange tube A is performed, for example, by placing the helical portion Aa constituting the heat exchange tube A in the air. Positioning and flowing a heat medium or a refrigerant through the tube 10 of the heat exchange tube A, and forcibly moving the air on the outer periphery of the heat exchange tube A by appropriate blowing means or the like as necessary. ,
Target heating, for example, without various heating and heating treatment,
In addition, the target cooling, for example, various cooling and cooling processes are performed.

In order to heat or cool the liquid on the outer periphery of the heat exchange tube A using the heat exchange tube A, for example, the spiral portion Aa constituting the heat exchange tube A is heated or cooled. It is positioned in a liquid tank, and a heat medium or a refrigerant is caused to flow through the tube 10 of the heat exchange tube A, and if necessary, the liquid on the outer periphery of the heat exchange tube A is stirred by a suitable stirring means. By forcibly moving, the target liquid is heated or cooled.

The heating or cooling of the fluid such as various gases or liquids guided to the heat exchange tube A is performed by changing the helical portion Aa of the heat exchange tube A to the atmosphere of the heating gas or the cooling gas. The heating gas or the cooling gas is forcibly moved by an appropriate blowing means as needed, and the fluid guided in the heat exchange tube A is heated or cooled by the heating gas or the cooling gas. I do.

The heating or cooling of the fluid such as various gases or liquids guided to the heat exchange tube A is performed by heating or cooling the helical portion Aa in the heat exchange tube A. The heating or cooling liquid is forcibly moved by an appropriate stirring means to heat or cool the fluid guided in the heat exchange tube A, if necessary.

The heat exchange tube A can be used by appropriately guiding a heat medium or a refrigerant to the tube 10 constituting the heat exchange tube A. In addition, the heat exchange tube A guides a heat medium or a refrigerant to the tube 10 constituting the heat exchange tube A via an appropriate tube, and uses the appropriate tube to heat the heat medium or the refrigerant. The heat medium or the refrigerant can be circulated and used through the heat exchange tube A using an appropriate pipe by using the refrigerant as another guide.

The heat exchange tubes A are connected to the heat exchange tubes A sequentially, and guide the heat medium or the refrigerant continuously to the connected heat exchange tubes A. The heat exchange means having a desired heat exchange amount can be constituted and used.

FIG. 4 shows a state in which a plurality of such heat exchange tubes A are sequentially connected, and the heat exchange tubes A are sequentially arranged so as to fit in a predetermined space. In the illustrated example, the connecting portions 10c and the connecting portions 1c in the heat exchange tube A are used.
Od is connected by a pipe joint 20.

The pipe joint 20 used to connect the heat exchange tube A according to the illustrated example has a rectangular cross section in which the connection portions 10c and 10d of the heat exchange tube A are closely fitted. It has a cylindrical portion, and the connecting portion 1
0c and a partitioning flange 21 to be in contact with each end of the connecting portion 10d, and a configuration for guiding the fluid guided through the pipe 10 in each heat exchange pipe A so as not to leak out. Be prepared as

In the heat exchange tube A according to the illustrated example, the helical portion Aa constituting the heat exchange tube A is provided.
Is formed in a substantially cylindrical shape, but the spiral portion may be formed in an arbitrary spiral shape such as a conical shape or a spindle shape.

(2) Heat Exchange Tube A According to Second Embodiment Next, a heat exchange tube A according to the second embodiment shown in FIGS. 6 to 8 will be specifically described. .

The heat exchange tube A according to the second embodiment has a spiral portion Aa composed of a tube 10 used for heat exchange between a fluid guided inside and an external gas or liquid. A tube A for heat exchange, wherein adjacent tubes 10 and 10 of the tube 10 constituting the spiral portion Aa are separated from each other, and at least the spiral portion in the tube A for heat exchange. The tube 10 of Aa is
The pipe width x in the direction of the line segment tt passing through the curved inner side 10a and the curved outer side 10b is determined by the pipe width y in the direction orthogonal to the direction of the line segment tt passing through the curved inner side 10a and the curved outer side 10b. Is also a large configuration.

In the tube A for heat exchange according to the second embodiment, the tube 10 constituting the tube A for heat exchange is provided with a partition wall 12. The configuration is the same or substantially the same as the configuration of the heat exchange tube A according to the first embodiment except that the tube 10 has a configuration in which the hole 11a and the hole 11b are provided therein. . Therefore, the same or substantially the same components as those of the heat exchange tube A according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

The tube 10 constituting the spiral portion Aa of the heat exchange tube A according to the second embodiment is the same as the first embodiment.
As in the case of the tube 10 constituting the spiral portion Aa of the heat exchange tube A according to the embodiment, between the fluid guided inside the tube 10 and the gas or liquid outside the tube 10 Any material may be used as long as it is made of a material capable of efficiently exchanging heat. For example, an aluminum tube 10, a copper tube 10, and various alloy tubes 1 may be used.
It is constituted by a tube made of an appropriate material such as various metal tubes 10 such as 0.

The tube 10 constituting the heat exchange tube A according to the second embodiment is different from the tube 10 constituting at least the spiral portion Aa of the heat exchange tube A in the first embodiment. In the same manner as the tube 10 constituting the heat exchange tube A according to the embodiment, the curved inner portion 10a and the curved outer portion 10 in the spiral portion Aa are formed.
b, the pipe width x in the direction of the line segment tt passing through the line segment tt
It is configured to be larger than the pipe width y in the direction orthogonal to the direction of t. That is, in the illustrated example, the pipe 10
The pipe 1 constituting the spiral portion Aa has a cross-sectional shape in a direction orthogonal to the flow direction of the fluid guided through the hole 11F.
0, the direction of the line segment tt passing through the curved inner side 10a and the curved outer side 10b, that is, a rectangular shape long in the radial direction of the cylindrical body formed by the spiral portion Aa, and more specifically, The cross-sectional shape is determined by the direction of a line tt passing through the curved inner side 10a and the curved outer side 10b of the tube 10 constituting the spiral portion Aa, that is, the radius of the cylindrical body formed by the spiral portion Aa. The tube 10 has a flat rectangular shape with the long side being the pipe width x in the direction of the direction, and the long sides are separated by the partition wall 12. A pair of holes 11 inside
a, hole 11b.

The tube 10 of the helical portion Aa constituting the heat exchange tube A has a cylindrical hole H having a desired diameter in the helical axis direction of the helical portion Aa formed by the tube 10. As described above, the pipes are formed in a spiral shape curved at a predetermined curvature, and the pipes 10 adjacent to each other are separated from each other, that is, the pipes 10 adjacent to each other are formed so as to form a desired communication space k between the pipes 10 adjacent to each other. The tube 10 constituting the helical portion Aa is provided along a chord winding forming a required angle, that is, a line segment parallel to the axis center line of the helical portion Aa at a required angle.

In the helical portion Aa of the heat exchange tube A thus configured, the tube 10 constituting the helical portion Aa is moved in the flow direction of the fluid guided through the tube 10. The cross-sectional shape in the orthogonal direction is a rectangular shape that is long in the radial direction in the spiral portion Aa formed by the tube 10, and the spiral portion Aa formed by the tube 10 is substantially cylindrical. From the above, the pipe width x on the long side of the pipe 10 having a rectangular cross section
Are connected to each other, and the helical portion A is disposed between the opposed pipe surfaces of the pipe width x.
a, there is provided a communication space k for making the cylindrical hole H and the outside of the helical portion Aa in communication with each other. Effective heat is generated on each pipe surface of the pipe 10 facing this communication space k. Exchange is made.

Further, since the tube width y side of the short width side of the tube 10 constituting the spiral portion Aa is configured to be along a line parallel to the axis center line of the spiral portion Aa, A large number of tubes 10 along the string winding can be efficiently provided in a required space.

In the heat exchange tube A constructed as described above, the fluid may be guided to the pair of holes 11a and 11b provided in the heat exchange tube A, respectively. it can. Also, a pair of holes 11a in this pipe 10,
The hole 11b can be used as a forward path and a return path of the fluid.

The heat exchange tube A having such a configuration can be used as various heat exchange means in the same manner as in the heat exchange tube A according to the first embodiment.

(3) Heat Exchange Tube A According to Third Embodiment Further, a heat exchange tube A according to the third embodiment shown in FIGS. 9 to 11 will be specifically described. .

The heat exchange tube A according to the third embodiment has a helical portion Aa composed of a tube 10 used for heat exchange between a fluid guided inside and a gas or liquid outside. A tube A for heat exchange, wherein adjacent tubes 10 and 10 of the tube 10 constituting the spiral portion Aa are separated from each other, and at least the spiral portion in the tube A for heat exchange. The tube 10 of Aa is
The pipe width x in the direction of the line segment tt passing through 0a and the curved outer side 10b is determined by the pipe width y in the direction orthogonal to the direction of the line segment tt passing through the curved inner side 10a and the curved outer side 10b. Is also a large configuration.

In the tube A for heat exchange according to the third embodiment, at least the tube 10 constituting the helical portion Aa of the tube A for heat exchange is oriented in a direction orthogonal to the flow direction of the fluid. The cross-sectional shapes of the tube 10 are the curved inner side 10a and the curved outer side 1a.
The configuration other than having a long elliptical shape in the direction of 0b is the same or substantially the same as the configuration of the heat exchange tube A according to the first embodiment. Therefore, this first
The same or substantially the same components as those of the heat exchange tube A according to the embodiment are denoted by the same reference numerals, and description thereof is omitted.

The tube 10 constituting the spiral portion Aa of the heat exchange tube A according to the third embodiment is the same as the first embodiment.
As in the case of the tube 10 constituting the spiral portion Aa of the heat exchange tube A according to the embodiment, between the fluid guided inside the tube 10 and the gas or liquid outside the tube 10 Any material may be used as long as it is made of a material capable of efficiently exchanging heat. For example, an aluminum tube 10, a copper tube 10, and various alloy tubes 1 may be used.
It is constituted by a pipe made of an appropriate material such as various metal pipes 10 such as 0.

The tube 10 constituting the heat exchange tube A according to the third embodiment is different from the tube 10 constituting at least the spiral portion Aa of the heat exchange tube A in the first embodiment. In the same manner as the tube 10 constituting the heat exchange tube A according to the embodiment, the curved inner portion 10a and the curved outer portion 10 in the spiral portion Aa are formed.
b, the pipe width x in the direction of the line segment tt passing through the line segment tt
It is configured to be larger than the pipe width y in the direction orthogonal to the direction of t. That is, in the illustrated example, the pipe 10
The pipe 10 constituting the spiral portion Aa has a cross-sectional shape in a direction perpendicular to the flow direction of the fluid guided through the hole 11 in the pipe 10.
In the direction of the line segment tt passing through the curved inner side 10a and the curved outer side 10b, i.e., the elliptical shape whose major axis is the radial direction of the cylindrical body formed by the spiral portion Aa,
More specifically, the cross-sectional shape is changed between the curved inner side 10a and the curved outer side 10a of the tube 10 constituting the spiral part Aa.
b, the direction of the line segment tt passing through
Is a relatively flat elliptical shape whose major axis is the tube width x in the radial direction of the cylindrical body constituted by the above.

The tube 10 of the helical portion Aa constituting the heat exchange tube A has a cylindrical hole H having a desired diameter in the helical axis direction of the helical portion Aa formed by the tube 10. As described above, the pipes are formed in a spiral shape curved at a predetermined curvature, and the pipes 10 adjacent to each other are separated from each other, that is, the pipes 10 adjacent to each other are formed so as to form a desired communication space k between the pipes 10 adjacent to each other. The tube 10 constituting the helical portion Aa is provided along a chord winding forming a required angle, that is, a line segment parallel to the axis center line of the helical portion Aa at a required angle.

In the helical portion Aa of the heat exchange tube A configured as described above, the tube 10 constituting the helical portion Aa moves in the flow direction of the fluid guided through the tube 10. The cross-sectional shape in the orthogonal direction is an elliptical shape whose major axis is the radial direction of the spiral portion Aa formed by the tube 10, and the spiral portion Aa formed by the tube 10 is substantially cylindrical. As a result, the tube surfaces along the long axis of the tube 10 having an elliptical cross section are opposed to each other, and between the opposed tube surfaces, the cylindrical shape of the spiral portion Aa is formed. Hole H
And a communication space k for making the outside of the helical portion Aa into a communication state.
Is provided, and effective heat exchange is performed on each tube surface of the tube 10 facing the communication space k.

Further, since the tube width y on the short axis side of the tube 10 constituting the spiral portion Aa is configured to be along a line parallel to the axis center line of the spiral portion Aa, A large number of tubes 10 along the string winding can be efficiently provided in a required space.

The heat exchange tube A having such a configuration can be used as various heat exchange means in the same manner as in the heat exchange tube A according to the first embodiment.

The tube 10 constituting the heat exchange tube A according to the third embodiment is the same as the heat exchange tube A according to the second embodiment. A partition wall is provided in the inside of the pipe, and a pair of holes 11 are formed in one pipe 10.
a and the hole 11b.

[0064]

According to the present invention, there is provided a heat exchange tube having a spiral portion formed of a tube used for heat exchange between a fluid guided inside and an external gas or liquid. Wherein the adjacent tubes of the tubes constituting the helical portion are separated from each other, and at least the helical portion tubes in the heat exchange tube body have a curved inside and a curved outside of the tubes. Since the pipe width in the direction of the line passing through is larger than the pipe width in the direction orthogonal to the direction of the line passing through the inside of the curve and the outside of the curve, the predetermined three-dimensional shape can be efficiently used. This has the advantage that the heat exchange tube can be installed in the space.

In the heat exchange tubes constructed as described above, adjacent tubes in a spirally provided tube are provided with a predetermined space between the adjacent tubes. This has the advantage that the tube surface area of each tube can be set large.

[Brief description of the drawings]

FIG. 1 is a perspective view of a heat exchange tube according to a typical first embodiment.

FIG. 2 is a sectional view of the same.

FIG. 3 is a sectional view of a tube constituting the heat exchange tube.

FIG. 4 is a perspective view showing a state in which the heat exchange tubes are used continuously.

FIG. 5 is a sectional view of a main part of the connecting portion.

FIG. 6 is a perspective view of a heat exchange tube according to a typical second embodiment.

FIG. 7 is a sectional view of the same.

FIG. 8 is a sectional view of a tube constituting the heat exchange tube.

FIG. 9 is a perspective view of a heat exchange tube according to a typical third embodiment.

FIG. 10 is a sectional view of the same.

FIG. 11 is a sectional view of a tube constituting the heat exchange tube.

[Explanation of symbols]

 A Tube body for heat exchange Aa Spiral portion 10 Tube 10a Curved inner side 10b Curved outer side t line segment x tube width y tube width

Claims (3)

[Claims] 1. A heat exchange tube having a helical portion formed of a tube used for heat exchange between a fluid guided inside and an external gas or liquid, the helical portion constituting the helical portion. The adjacent tubes of the tubes are separated from each other, and the tube of at least the spiral portion of the heat exchange tube has a tube width in a direction of a line passing through the inside and outside of the curve of the tube. A heat exchanger tube characterized in that the tube width is larger than a tube width in a direction orthogonal to a direction of a line passing through the inside of the curve and the outside of the curve. 2. The pipe according to claim 1, wherein a cross section of the pipe in a direction orthogonal to a flow direction of the fluid has a rectangular shape that is long in a direction of a curved inside and a curved outside of the pipe.
The tube for heat exchange according to 4. 3. The pipe according to claim 1, wherein a cross section of the pipe in a direction orthogonal to a flow direction of the fluid has an elliptical shape that is long in a direction of a curved inside and a curved outside of the pipe.
The tube for heat exchange according to 4.