JP2012193869A - Double-pipe heat exchanger and method for manufacturing the same - Google Patents

Double-pipe heat exchanger and method for manufacturing the same Download PDF

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JP2012193869A
JP2012193869A JP2011056146A JP2011056146A JP2012193869A JP 2012193869 A JP2012193869 A JP 2012193869A JP 2011056146 A JP2011056146 A JP 2011056146A JP 2011056146 A JP2011056146 A JP 2011056146A JP 2012193869 A JP2012193869 A JP 2012193869A
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pipe
tube
spiral
heat exchanger
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JP5689341B2 (en
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Yukinobu Taniguchi
行伸 谷口
Masaaki Takase
正明 高瀬
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T Rad Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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Abstract

PROBLEM TO BE SOLVED: To improve the efficiency of heat exchanging, in a double-pipe heat exchanger having an inner pipe 1 and an outer pipe 2.SOLUTION: A first spiral protrusion 3 and a second spiral protrusion 4 are bent and formed on the inner pipe 1 and the outer pipe 2, respectively, and surface contact is provided between the first spiral protrusion 3 and the second spiral protrusion 4.

Description

本発明は、内管の外側に外管が被嵌され、それらの間に第１流体が流通するとともに、内管の内側に第２流体が流通して、両流体間に熱交換が行なわれる二重管型熱交換器に関する。   In the present invention, an outer tube is fitted on the outer side of the inner tube, the first fluid flows between them, and the second fluid flows on the inner side of the inner tube, so that heat exchange is performed between the two fluids. The present invention relates to a double tube heat exchanger.

下記特許文献１に、燃料電池発電システムにおける水の蒸発器として、三重管型熱交換器が記載されている。
これは燃焼排ガスにより水を加熱して気化させる蒸発器であって、内周面側に燃料排ガスを流通させ、水を流通させる流通路を軸線方向に向かって螺旋状に形成する。そして、円筒体とその円筒体の外周面に同軸をなして取付けられた螺旋条をなす外側螺旋波形管とを備える。それとともに、円筒体の内側に同軸をなして案内筒を配置したものである。そして、その円筒体と外側螺旋波形管との間に水を供給し、案内筒と円筒体との間に燃焼排ガスを流通させるものである。 Patent Document 1 listed below describes a triple tube heat exchanger as a water evaporator in a fuel cell power generation system.
This is an evaporator that heats and vaporizes water with combustion exhaust gas. The fuel exhaust gas is circulated on the inner peripheral surface side, and a flow passage for circulating water is formed in a spiral shape in the axial direction. A cylindrical body and an outer spiral corrugated tube forming a spiral strip coaxially attached to the outer peripheral surface of the cylindrical body are provided. At the same time, a guide tube is arranged coaxially inside the cylindrical body. Then, water is supplied between the cylindrical body and the outer spiral corrugated tube, and the combustion exhaust gas is circulated between the guide cylinder and the cylindrical body.

特開２００７−１３９４０４号公報JP 2007-139404 A

上記特許文献の熱交換器は、その熱交換壁面が円筒体であり、それに外側螺旋波形管が螺旋状に線接触したものである。そのため、両者の接触面が極めて小さく、熱交換効率が悪い欠点がある。
そこで本発明は、熱交換性能のよい二重管型熱交換器を提供することを課題とする。 In the heat exchanger of the above-mentioned patent document, the heat exchange wall surface is a cylindrical body, and the outer spiral corrugated tube is in line contact with the spiral. For this reason, there is a disadvantage that the contact surface between the two is extremely small and the heat exchange efficiency is poor.
Therefore, an object of the present invention is to provide a double-pipe heat exchanger with good heat exchange performance.

請求項１に記載の本発明は、内管(1)の外側に外管(2)が被着された二重管型熱交換器において、
内管(1)に第１螺旋突条(3)が曲折形成され、その第１螺旋突条(3)に整合する第２螺旋突条(4)が外管(2)に曲折形成され、その第２螺旋突条(4)の内面と、前記第１螺旋突条(3)の外周とが面接触すると共に、その接触面が接合されることなく、互いに相対移動自在に構成され、
その内管(1)の外周と外管(2)の内周と間に螺旋状の第１流路(5)が形成され、その内管(1)の内周に第２流路(6)が形成され、第１流路(5)と第２流路(6)の一方に低温の第１流体(7)が流通されると共に、他方に高温の第２流体(8)が流通されることを特徴とする二重管型熱交換器である。 The present invention according to claim 1 is a double tube heat exchanger in which an outer tube (2) is attached to the outside of an inner tube (1).
A first spiral ridge (3) is bent on the inner pipe (1), and a second spiral ridge (4) aligned with the first spiral ridge (3) is bent on the outer pipe (2). The inner surface of the second spiral protrusion (4) and the outer periphery of the first spiral protrusion (3) are in surface contact with each other, and the contact surfaces are not joined to each other, and are configured to be movable relative to each other.
A spiral first flow path (5) is formed between the outer circumference of the inner pipe (1) and the inner circumference of the outer pipe (2), and a second flow path (6) is formed on the inner circumference of the inner pipe (1). ) Is formed, and the low temperature first fluid (7) is circulated through one of the first flow path (5) and the second flow path (6), and the high temperature second fluid (8) is circulated through the other. This is a double-tube heat exchanger.

請求項２に記載の本発明は、請求項１に記載の二重管型熱交換器において、
高温の前記第２流体(8)が第２流路(6)に流通し、それが非流通状態のときは、外管(2)の螺旋突条(4)が存在せず、第２流体(8)の流通に伴い、内管(1)が膨張して、その第１螺旋突条(3)が外管(2)の内面に押圧されて、外管(2)に第２螺旋突条(4)が形成されるように構成された二重管型熱交換器である。 According to a second aspect of the present invention, in the double pipe heat exchanger according to the first aspect,
When the high-temperature second fluid (8) flows through the second flow path (6) and is in a non-flowing state, the spiral protrusion (4) of the outer pipe (2) does not exist, and the second fluid With the circulation of (8), the inner pipe (1) expands, and the first spiral protrusion (3) is pressed against the inner surface of the outer pipe (2), so that the second spiral protrusion on the outer pipe (2). It is a double-tube heat exchanger configured to form the strip (4).

請求項３に記載の本発明は、請求項２に記載の二重管型熱交換器において、
第１螺旋突条(3)と第２螺旋突条(4)との間に螺旋状の閉塞空間(9)が形成される二重管型熱交換器である。 The present invention described in claim 3 is the double pipe heat exchanger according to claim 2,
It is a double tube heat exchanger in which a spiral closed space (9) is formed between the first spiral ridge (3) and the second spiral ridge (4).

請求項４に記載の本発明は、請求項１に記載の二重管型熱交換器を製造する方法において、
外面側に第１螺旋突条(3)を有する内管(1)の外周に、螺旋突条の存在しない断面直径が同一な直管からなる外管(2)を被嵌する工程と、
内管(1)に加圧体を充填することにより、その内管(1)を半径方向外周に塑性変形して、内管(1)の第１螺旋突条(3)を外管(2)に押圧して、外管(2)に第２螺旋突条(4)を塑性変形により形成させる工程と、を有する二重管型熱交換器の製造方法である。 According to a fourth aspect of the present invention, there is provided a method of manufacturing the double-pipe heat exchanger according to the first aspect.
Fitting the outer pipe (2) made of a straight pipe having the same cross-sectional diameter without the spiral protrusion on the outer periphery of the inner pipe (1) having the first spiral protrusion (3) on the outer surface side;
By filling the inner pipe (1) with a pressurized body, the inner pipe (1) is plastically deformed radially outward, and the first spiral protrusion (3) of the inner pipe (1) is transformed into the outer pipe (2 ) To form a second spiral protrusion (4) on the outer tube (2) by plastic deformation.

請求項５に記載の本発明は、請求項１に記載の二重管型熱交換器を製造する方法において、
内面側に第２螺旋突条(4)を有する外管(2)の内側に、螺旋突条の存在しない断面直径が同一な直管よりなる内管(1)を挿入する工程と、
内管(1)に加圧体を充填し、それを半径方向外周に塑性変形することにより、内管(1)を外管(2)の第２螺旋突条(4)に押圧して、その内管(1)に第１螺旋突条(3)をその内側に塑性変形により形成させる工程と、を有する二重管型熱交換器の製造方法である。 The present invention according to claim 5 provides a method for manufacturing the double-tube heat exchanger according to claim 1,
Inserting the inner pipe (1) made of a straight pipe having the same cross-sectional diameter without the spiral protrusion into the inner side of the outer pipe (2) having the second spiral protrusion (4) on the inner surface side;
By filling the inner pipe (1) with a pressurized body and plastically deforming it to the outer circumference in the radial direction, the inner pipe (1) is pressed against the second spiral protrusion (4) of the outer pipe (2), And a step of forming a first spiral protrusion (3) on the inner tube (1) by plastic deformation inside thereof.

本発明の二重管型熱交換器は、外管２の第２螺旋突条４の内面と、内管１の第１螺旋突条３の外面とが面接触するとともに、その接触面が接合されることなく、互いに相対移動自在に構成されている。そして、内管１の外周と外管２との間に第１流路５が形成され、内管１の内周に第２流路６が形成されたものである。そのため、第１流路５と第２流路６に流通する第１流体７と第２流体８との熱交換を効率よく行なうことができる。即ち、内管１と外管２とは、その第１螺旋突条３と第２螺旋突条４とにおいて面接触しているため、伝熱性がよく、内管１の第２流体８の熱が容易に外管２に伝導し、第１流体７を内管１と外管２の両側から加熱または冷却することができる。
それとともに、それらの間の第１流路５が螺旋状に形成され、そこに流体が流通するため、流路長が長くなり、熱交換を促進する。さらには、第１螺旋突条３と第２螺旋突条４とが面接触するにもかかわらず、その接触面が接合されることなく、互いに相対移動自在に形成されているから、内管１と外管２との熱膨張の差に基づく、熱歪みを自在に取除くことができ、寿命の長い二重管型熱交換器を提供できる。 In the double-tube heat exchanger of the present invention, the inner surface of the second spiral protrusion 4 of the outer tube 2 and the outer surface of the first spiral protrusion 3 of the inner tube 1 are in surface contact, and the contact surface is joined. It is comprised so that relative movement is possible mutually without being carried out. A first flow path 5 is formed between the outer periphery of the inner tube 1 and the outer tube 2, and a second flow path 6 is formed on the inner periphery of the inner tube 1. Therefore, heat exchange between the first fluid 7 and the second fluid 8 flowing through the first channel 5 and the second channel 6 can be performed efficiently. That is, since the inner tube 1 and the outer tube 2 are in surface contact with each other at the first spiral protrusion 3 and the second spiral protrusion 4, the heat transfer is good and the heat of the second fluid 8 in the inner tube 1 is good. Is easily conducted to the outer tube 2, and the first fluid 7 can be heated or cooled from both sides of the inner tube 1 and the outer tube 2.
At the same time, the first flow path 5 between them is formed in a spiral shape, and the fluid flows therethrough, so that the flow path length becomes longer and heat exchange is promoted. Furthermore, although the first spiral ridge 3 and the second spiral ridge 4 are in surface contact, the contact surfaces are formed so as to be movable relative to each other without being joined. The heat distortion based on the difference in thermal expansion between the outer tube 2 and the outer tube 2 can be removed freely, and a long-life double-tube heat exchanger can be provided.

上記構成において、請求項２に記載のように、高温の第２流体８が第２流路６を流通し、それが非流通状態のときは、外管２の第２螺旋突条４が存在せず、第２流体８の流通にともない内管１が膨張して、その第１螺旋突条３が外管２の内面を押圧し、外管２に第２螺旋突条４が形成されるように構成した場合には、内管１と外管２との熱歪みの差に基づく両者の管の相対移動を過渡的により容易に行ないうる。   In the above configuration, as described in claim 2, when the high-temperature second fluid 8 flows through the second flow path 6 and is in a non-flowing state, the second spiral protrusion 4 of the outer tube 2 is present. Instead, the inner tube 1 expands as the second fluid 8 flows, and the first spiral protrusion 3 presses the inner surface of the outer tube 2, and the second spiral protrusion 4 is formed on the outer tube 2. In the case of such a configuration, the relative movement of the two tubes based on the difference in thermal strain between the inner tube 1 and the outer tube 2 can be made transiently more easily.

上記構成において、請求項３に記載のように、第１螺旋突条３と第２螺旋突条４との間に螺旋状の閉塞空間９を形成した場合には、内管１と外管２との温度差を十分確保し、それらの間の面接触状態を適当に維持することができる。   In the above configuration, when the spiral closed space 9 is formed between the first spiral protrusion 3 and the second spiral protrusion 4, as described in claim 3, the inner tube 1 and the outer tube 2 are formed. Is sufficiently secured, and the surface contact state between them can be appropriately maintained.

次に、請求項４に記載の二重管型熱交換器の製造方法は、請求項１に記載の熱交換器を製造する方法であって、第１螺旋突条３を有する内管１外周に直管からなる外管２を被嵌した後に、加圧体を内管１に充填して、内管１および外管２を塑性変形する。そして、第１螺旋突条３と外管２の第２螺旋突条４とを圧接し、両螺旋突条を面接触させるものである。この方法によれば、容易に効率のよい二重管型熱交換器を製造できる。   Next, the manufacturing method of the double pipe type heat exchanger according to claim 4 is a method of manufacturing the heat exchanger according to claim 1, wherein the outer periphery of the inner tube 1 having the first spiral protrusion 3 is provided. After the outer tube 2 made of a straight tube is fitted on the inner tube 1, the inner tube 1 is filled with a pressurizing body, and the inner tube 1 and the outer tube 2 are plastically deformed. And the 1st spiral protrusion 3 and the 2nd spiral protrusion 4 of the outer tube 2 are press-contacted, and both spiral protrusions are surface-contacted. According to this method, an efficient double tube heat exchanger can be easily manufactured.

請求項５に記載の製造方法は、内面側に第２螺旋突条４を有する外管２の内側に、直管からなる内管１を挿入し、その内管１に加圧体を充満して、内管１および外管２を塑性変形する。そして、第２螺旋突条４に面接触する第１螺旋突条３を形成したものであるから、熱交換性能のよい二重管型熱交換器を容易に製造できる。   In the manufacturing method according to claim 5, the inner tube 1 made of a straight tube is inserted inside the outer tube 2 having the second spiral protrusion 4 on the inner surface side, and the inner tube 1 is filled with a pressurized body. The inner tube 1 and the outer tube 2 are plastically deformed. And since the 1st spiral ridge 3 which surface-contacts with the 2nd spiral ridge 4 is formed, the double pipe type heat exchanger with a good heat exchange performance can be manufactured easily.

本発明の二重管型熱交換器の第１実施例の要部縦断面図。The principal part longitudinal cross-sectional view of 1st Example of the double-tube type heat exchanger of this invention. 同熱交換器を製造するための説明図。Explanatory drawing for manufacturing the same heat exchanger. 本発明の二重管型熱交換器の第２実施例の要部縦断面図。The principal part longitudinal cross-sectional view of 2nd Example of the double-tube type heat exchanger of this invention. 本発明の二重管型熱交換器の第３実施例の要部縦断面図。The principal part longitudinal cross-sectional view of 3rd Example of the double-tube type heat exchanger of this invention. 本発明の二重管型熱交換器の第４実施例の要部縦断面図。The principal part longitudinal cross-sectional view of 4th Example of the double-tube type heat exchanger of this invention.

次に、図面に基づいて本発明の各実施の形態につき説明する。
（第１実施例）
図１は、本発明の第１実施例の要部縦断面図であって、内管１の外側に外管２が被嵌されている。内管１は、第１螺旋突条３が外周面に突出するように、曲折形成されたものである。また、外管２は内管１同様にその外側に第２螺旋突条４が突設されるように曲折変形され、その第２螺旋突条４の内面と内管１の第１螺旋突条３外面とが曲面で馴染み、面接触する。そして、その接触面は接合されることなく、互いに相対移動自在に形成されている。
内管１および外管２は、アルミニウム材やステンレス材等の金属板からなる。そして、内管１と外管２とはそれぞれの螺旋突条部のみで面接触され、それ以外の面では対向してその間に螺旋状の第１流路５が形成される。 Next, each embodiment of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a longitudinal sectional view of an essential part of a first embodiment of the present invention, in which an outer tube 2 is fitted on the outer side of an inner tube 1. The inner tube 1 is formed by bending so that the first spiral protrusion 3 protrudes on the outer peripheral surface. Similarly to the inner tube 1, the outer tube 2 is bent and deformed so that a second spiral protrusion 4 is provided on the outer side thereof, and the inner surface of the second spiral protrusion 4 and the first spiral protrusion of the inner tube 1. 3 The outer surface is familiar with the curved surface and comes into surface contact. The contact surfaces are formed so as to be movable relative to each other without being joined.
The inner tube 1 and the outer tube 2 are made of a metal plate such as an aluminum material or a stainless material. The inner tube 1 and the outer tube 2 are brought into surface contact only with the respective spiral protrusions, and the other surfaces are opposed to each other, and a spiral first flow path 5 is formed therebetween.

この例では、その螺旋状の第１流路５内に第１流体７が流通し、内管１の内側の第２流路６には第２流体８が流通する。第１流体７と第２流体８は、この例では対向流としている。第２流体８は一例として高温の排ガスが流通し、第１流体７として水が供給される。そして、第１流体７と第２流体８との間に熱交換が行なわれる。
この時、高温流体である第２流体８の熱が内管１の第１螺旋突条３と、外管２の第２螺旋突条４を介し、外管２に伝熱される。それによって、第１流体７は内管１側と外管２側との両者から加熱される。これは、第１螺旋突条３と第２螺旋突条４とは面接触され、第１流体７が短絡することなく、螺旋状に流通し、両者の伝熱性がよく、第２流体８の熱が外管２に伝熱して、その第１流体７を内管と外管との両側から加熱するものである。 In this example, the first fluid 7 flows in the spiral first flow path 5, and the second fluid 8 flows in the second flow path 6 inside the inner tube 1. The first fluid 7 and the second fluid 8 are counterflow in this example. As an example, the second fluid 8 is supplied with high-temperature exhaust gas, and water is supplied as the first fluid 7. Then, heat exchange is performed between the first fluid 7 and the second fluid 8.
At this time, the heat of the second fluid 8, which is a high-temperature fluid, is transferred to the outer tube 2 through the first spiral ridge 3 of the inner tube 1 and the second spiral ridge 4 of the outer tube 2. Thereby, the first fluid 7 is heated from both the inner tube 1 side and the outer tube 2 side. This is because the first spiral ridge 3 and the second spiral ridge 4 are in surface contact with each other, and the first fluid 7 circulates in a spiral shape without short-circuiting. Heat is transferred to the outer tube 2 to heat the first fluid 7 from both sides of the inner tube and the outer tube.

（製造方法）
次に、図１に示す二重管型熱交換器を製造する一例を図２において説明する。
この例は、直管からなる外管２を内管１の外側に被嵌する。この内管１は、外面側に第１螺旋突条３が形成されたものである。そして、外管２には螺旋突条が存在しない。そこで、内管１の一端を閉塞体10および締結環11により閉塞し、内管１の他端から高圧の加圧流体12を供給する。そして、その加圧流体12により内管１を拡開して、塑性変形し、その第１螺旋突条３を外管２に押圧し、それにより外管２に第２螺旋突条４を塑性形成させる。その後、閉塞体10および締結環11を取外すことで、図１に示す二重管型熱交換器を製造することができる。上記加圧流体による塑性変形に代えて、内管１内にウレタンやゴム材等を挿入し、それを加圧してウレタンバルジ加工、ゴムバルジ加工をすることもできる。 (Production method)
Next, an example of manufacturing the double tube heat exchanger shown in FIG. 1 will be described with reference to FIG.
In this example, an outer tube 2 made of a straight tube is fitted on the outside of the inner tube 1. The inner tube 1 is formed with a first spiral protrusion 3 formed on the outer surface side. And the outer tube | pipe 2 does not have a spiral protrusion. Therefore, one end of the inner tube 1 is closed with the closing body 10 and the fastening ring 11, and a high-pressure pressurized fluid 12 is supplied from the other end of the inner tube 1. Then, the inner pipe 1 is expanded and plastically deformed by the pressurized fluid 12, and the first spiral protrusion 3 is pressed against the outer pipe 2, whereby the second spiral protrusion 4 is plastically applied to the outer pipe 2. Let it form. Thereafter, the double tube type heat exchanger shown in FIG. 1 can be manufactured by removing the closing body 10 and the fastening ring 11. Instead of plastic deformation by the pressurized fluid, urethane or rubber material or the like may be inserted into the inner tube 1 and pressurized to perform urethane bulge processing or rubber bulge processing.

（第２実施例）
次に、図３は本発明の第２実施例の要部縦断面図であって、この例が図１のそれと異なる点は、内管１および外管２の第１螺旋突条３、第２螺旋突条４がそれぞれ管の内側に突設形成されたものである。そして、他は内管１と同様である。
この熱交換器は、図２に準じて製造することができるが、この場合、内管１を直管とし、外管２に第２螺旋突条４をその内面側に突設して形成する。そして、図２同様に内管１内に加圧流体12を充填し、直管である内管１を外管２の第２螺旋突条４に押し当てて、図３の熱交換器を製造することができる。 (Second embodiment)
Next, FIG. 3 is a longitudinal sectional view of an essential part of a second embodiment of the present invention. This example is different from that of FIG. 1 in that the first spiral ridge 3 of the inner tube 1 and the outer tube 2, the first Two spiral ridges 4 are each formed to project from the inside of the pipe. Others are the same as the inner tube 1.
This heat exchanger can be manufactured according to FIG. 2, but in this case, the inner tube 1 is a straight tube, and the outer tube 2 is formed with a second spiral protrusion 4 protruding from the inner surface thereof. . Then, as in FIG. 2, the inner pipe 1 is filled with the pressurized fluid 12, and the straight inner pipe 1 is pressed against the second spiral protrusion 4 of the outer pipe 2 to manufacture the heat exchanger of FIG. can do.

（第３実施例）
次に、図４に示す内管１と外管２はそれらを塑性変形させることなく、そのまま使用することができる。その際、内管１の第１螺旋突条３と内面とが接触していることが好ましい。そして、内管１内に高温の第２流体８を供給することにより、内管１を膨張させ、外管２に押し当てて、図１の状態が形成される。
即ち、高温流体により内管１が外側に拡開されて、その押圧により外管２に第２螺旋突条４が形成され、第１螺旋突条３と第２螺旋突条４とが面接触されるものである。そして、内管１と外管２との間に図１同様に第１流体７が供給され、第１流体７と第２流体８との間に熱交換が行なわれるものである。
次いで、第２流体８を取除くと、熱交換器は図４に示すように、外管２は直管に戻る。 (Third embodiment)
Next, the inner tube 1 and the outer tube 2 shown in FIG. 4 can be used as they are without plastically deforming them. In that case, it is preferable that the 1st spiral protrusion 3 and the inner surface of the inner pipe 1 are contacting. And by supplying the high temperature 2nd fluid 8 in the inner tube | pipe 1, the inner tube | pipe 1 is expanded and pressed against the outer tube | pipe 2, and the state of FIG. 1 is formed.
That is, the inner pipe 1 is expanded outward by the high-temperature fluid, and the second spiral protrusion 4 is formed on the outer pipe 2 by the pressing, and the first spiral protrusion 3 and the second spiral protrusion 4 are in surface contact. It is what is done. Then, the first fluid 7 is supplied between the inner tube 1 and the outer tube 2 as in FIG. 1, and heat exchange is performed between the first fluid 7 and the second fluid 8.
Next, when the second fluid 8 is removed, the outer tube 2 returns to the straight tube as shown in FIG.

（第４実施例）
次に、図５は本発明の第４実施例であり、この例が図１の例と異なる点は、第１螺旋突条３と第２螺旋突条４との間に閉塞空間９を形成したものである。この閉塞空間９の存在により、内管１と外管２との伝熱状態を適当な値に制御し、第１螺旋突条３と第２螺旋突条４との接触状態を強固にするものである。 (Fourth embodiment)
Next, FIG. 5 shows a fourth embodiment of the present invention. This example differs from the example of FIG. 1 in that a closed space 9 is formed between the first spiral ridge 3 and the second spiral ridge 4. It is a thing. Due to the presence of the closed space 9, the heat transfer state between the inner tube 1 and the outer tube 2 is controlled to an appropriate value, and the contact state between the first spiral protrusion 3 and the second spiral protrusion 4 is strengthened. It is.

１ 内管
２ 外管
３ 第１螺旋突条
４ 第２螺旋突条
５ 第１流路
６ 第２流路 DESCRIPTION OF SYMBOLS 1 Inner tube 2 Outer tube 3 1st spiral protrusion 4 2nd spiral protrusion 5 1st flow path 6 2nd flow path

７ 第１流体
８ 第２流体
９ 閉塞空間
10 閉塞体
11 締結環
12 加圧流体 7 First fluid 8 Second fluid 9 Closed space
10 Occlusion body
11 Fastening ring
12 Pressurized fluid

Claims (5)

内管(1)の外側に外管(2)が被着された二重管型熱交換器において、
内管(1)に第１螺旋突条(3)が曲折形成され、その第１螺旋突条(3)に整合する第２螺旋突条(4)が外管(2)に曲折形成され、その第２螺旋突条(4)の内面と、前記第１螺旋突条(3)の外周とが面接触すると共に、その接触面が接合されることなく、互いに相対移動自在に構成され、
その内管(1)の外周と外管(2)の内周と間に螺旋状の第１流路(5)が形成され、その内管(1)の内周に第２流路(6)が形成され、第１流路(5)と第２流路(6)の一方に低温の第１流体(7)が流通されると共に、他方に高温の第２流体(8)が流通されることを特徴とする二重管型熱交換器。 In the double tube heat exchanger with the outer tube (2) attached to the outside of the inner tube (1),
A first spiral ridge (3) is bent on the inner pipe (1), and a second spiral ridge (4) aligned with the first spiral ridge (3) is bent on the outer pipe (2). The inner surface of the second spiral protrusion (4) and the outer periphery of the first spiral protrusion (3) are in surface contact with each other, and the contact surfaces are not joined to each other, and are configured to be movable relative to each other.
A spiral first flow path (5) is formed between the outer circumference of the inner pipe (1) and the inner circumference of the outer pipe (2), and a second flow path (6) is formed on the inner circumference of the inner pipe (1). ) Is formed, and the low temperature first fluid (7) is circulated through one of the first flow path (5) and the second flow path (6), and the high temperature second fluid (8) is circulated through the other. A double-tube heat exchanger characterized by that. 請求項１に記載の二重管型熱交換器において、
高温の前記第２流体(8)が第２流路(6)に流通し、それが非流通状態のときは、外管(2)の螺旋突条(4)が存在せず、第２流体(8)の流通に伴い、内管(1)が膨張して、その第１螺旋突条(3)が外管(2)の内面に押圧されて、外管(2)に第２螺旋突条(4)が形成されるように構成された二重管型熱交換器。 The double-tube heat exchanger according to claim 1,
When the high-temperature second fluid (8) flows through the second flow path (6) and is in a non-flowing state, the spiral protrusion (4) of the outer pipe (2) does not exist, and the second fluid With the circulation of (8), the inner pipe (1) expands, and the first spiral protrusion (3) is pressed against the inner surface of the outer pipe (2), so that the second spiral protrusion on the outer pipe (2). Double-tube heat exchanger configured to form strip (4). 請求項２に記載の二重管型熱交換器において、
第１螺旋突条(3)と第２螺旋突条(4)との間に螺旋状の閉塞空間(9)が形成される二重管型熱交換器。 The double pipe heat exchanger according to claim 2,
A double-tube heat exchanger in which a spiral closed space (9) is formed between the first spiral ridge (3) and the second spiral ridge (4). 請求項１に記載の二重管型熱交換器を製造する方法において、
外面側に第１螺旋突条(3)を有する内管(1)の外周に、螺旋突条の存在しない断面直径が同一な直管からなる外管(2)を被嵌する工程と、
内管(1)に加圧体を充填することにより、その内管(1)を半径方向外周に塑性変形して、内管(1)の第１螺旋突条(3)を外管(2)に押圧して、外管(2)に第２螺旋突条(4)を塑性変形により形成させる工程と、を有する二重管型熱交換器の製造方法。 In the method of manufacturing the double tube type heat exchanger according to claim 1,
Fitting the outer pipe (2) made of a straight pipe having the same cross-sectional diameter without the spiral protrusion on the outer periphery of the inner pipe (1) having the first spiral protrusion (3) on the outer surface side;
By filling the inner pipe (1) with a pressurized body, the inner pipe (1) is plastically deformed radially outward, and the first spiral protrusion (3) of the inner pipe (1) is transformed into the outer pipe (2 ) To form the second spiral protrusion (4) on the outer tube (2) by plastic deformation, and a method of manufacturing a double-tube heat exchanger. 請求項１に記載の二重管型熱交換器を製造する方法において、
内面側に第２螺旋突条(4)を有する外管(2)の内側に、螺旋突条の存在しない断面直径が同一な直管よりなる内管(1)を挿入する工程と、
内管(1)に加圧体を充填し、それを半径方向外周に塑性変形することにより、内管(1)を外管(2)の第２螺旋突条(4)に押圧して、その内管(1)に第１螺旋突条(3)をその内側に塑性変形により形成させる工程と、を有する二重管型熱交換器の製造方法。 In the method of manufacturing the double tube type heat exchanger according to claim 1,
Inserting the inner pipe (1) made of a straight pipe having the same cross-sectional diameter without the spiral protrusion into the inner side of the outer pipe (2) having the second spiral protrusion (4) on the inner surface side;
By filling the inner pipe (1) with a pressurized body and plastically deforming it to the outer circumference in the radial direction, the inner pipe (1) is pressed against the second spiral protrusion (4) of the outer pipe (2), Forming a first spiral ridge (3) on the inner tube (1) by plastic deformation inside the inner tube (1).
JP2011056146A 2011-03-15 2011-03-15 Double tube heat exchanger and method for manufacturing the same Expired - Fee Related JP5689341B2 (en)

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KR20170129428A (en) * 2016-05-17 2017-11-27 최준영 Humidifier for fuel cell system
WO2018131112A1 (en) * 2017-01-12 2018-07-19 三菱電機株式会社 Twisted tube heat exchanger and manufacturing method for twisted tube heat exchangers
KR20190019602A (en) * 2017-08-18 2019-02-27 조한용 Double wall pipe
KR102062653B1 (en) * 2018-05-28 2020-01-06 국방과학연구소 Cooling channel having inner pipe without material joining

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KR20170129428A (en) * 2016-05-17 2017-11-27 최준영 Humidifier for fuel cell system
WO2018131112A1 (en) * 2017-01-12 2018-07-19 三菱電機株式会社 Twisted tube heat exchanger and manufacturing method for twisted tube heat exchangers
KR20190019602A (en) * 2017-08-18 2019-02-27 조한용 Double wall pipe
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JP2020531789A (en) * 2017-08-18 2020-11-05 ハン ヨン チョ Double tube
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