EP1840495B1 - Double pipe heat exchanger and method of manufacturing the same - Google Patents

Double pipe heat exchanger and method of manufacturing the same Download PDF

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Publication number
EP1840495B1
EP1840495B1 EP05704232A EP05704232A EP1840495B1 EP 1840495 B1 EP1840495 B1 EP 1840495B1 EP 05704232 A EP05704232 A EP 05704232A EP 05704232 A EP05704232 A EP 05704232A EP 1840495 B1 EP1840495 B1 EP 1840495B1
Authority
EP
European Patent Office
Prior art keywords
pipe
heat exchanger
inner pipe
outer pipe
fluid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP05704232A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1840495A1 (en
EP1840495A4 (en
Inventor
Kazuhiko Yusa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
T Rad Co Ltd
Original Assignee
T Rad Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by T Rad Co Ltd filed Critical T Rad Co Ltd
Publication of EP1840495A1 publication Critical patent/EP1840495A1/en
Publication of EP1840495A4 publication Critical patent/EP1840495A4/en
Application granted granted Critical
Publication of EP1840495B1 publication Critical patent/EP1840495B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/08—Tubular elements crimped or corrugated in longitudinal section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
    • F28D7/106—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically consisting of two coaxial conduits or modules of two coaxial conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/06—Tubular elements of cross-section which is non-circular crimped or corrugated in cross-section
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49361—Tube inside tube

Definitions

  • the present invention relates to a double pipe heat exchanger that is: used as an EGR cooler, an oil cooler, or the like; and bent along the piping route of a vehicle.
  • An EGR cooler is interposed in the middle of the pipe for the exhaust gas of an engine and cools the exhaust gas with cooling water.
  • An example thereof is "a double pipe heat exchanger" disclosed in Japanese Unexamined Patent Publication No. 2000-161871 .
  • the heat exchanger has a double pipe structure comprising an inner pipe and an outer pipe, and radiator fins are integrally bent and formed at an intermediate portion in the axial direction of the inner pipe. That is, a large number of protrusions are formed in the radial directions from the center in a cross section at the intermediate portion of the inner pipe.
  • JP2002-013882 describes a double-page heat exchanger having radial protrusions in cross section and a continuous structure in the axial direction and according to the preamble of claim 1.
  • a conventional EGR cooler is interposed into a linear part located in the middle of the exhaust gas pipe for an engine.
  • the positioning of the EGR cooler is inflexible, the number of parts increases, and the production cost as a whole has been obliged to increase.
  • an object of the present invention is to provide: a double pipe heat exchanger that has a simple structure and can be easily bent along a piping route; and a method for producing the double pipe heat exchanger.
  • the present invention according to Claim 1 is a double pipe heat exchanger wherein:
  • the present invention according to Claim 2 is a double pipe heat exchanger according to Claim 1, wherein only the center portions of the end edges of the balloon-shaped bulges (3) on the outside in the radial directions touch the inner surface of the outer pipe (2).
  • the present invention according to Claim 3 is a double pipe heat exchanger according to Claim 1 or 2, wherein:
  • the present invention according to Claim 4 is a double pipe heat exchanger according to Claim 1 or 2, wherein:
  • the present invention according to Claim 5 is a double pipe heat exchanger according to any one of Claims 1 to 4, wherein, in an axial cross-section of the inner pipe (1) :
  • the present invention according to Claim 6 is a method for producing a double pipe heat exchanger according to any one of Claims 1 to 5, comprising the processes of:
  • a double pipe heat exchanger and a production method thereof according to the present invention are configured as stated above and exhibit the following effects.
  • a double pipe heat exchanger is: formed by bending the inner pipe 1 and the outer pipe 2 in the state where the outer pipe 2 is fitted outside the inner pipe 1; and, in the state, configured so that the inner pipe 1 may have a plurality of bulges 3 and the top portions 9 at the outermost ends of the waves formed on the bulges 3 may touch the inner surface of the outer pipe 2.
  • the inner pipe 1 has a plurality of bulges 3 extending in the radial directions from the center, the bulges 3 communicate with one another, and a plurality of grooves 10 is formed at the outer circumference of the center portion.
  • the cross section hardly deforms when the inner pipe 1 and the outer pipe 2 are bent by applying external force. That is, since the top portions 9 of the waves of the inner pipe 1 touch the inner surface of the outer pipe 2, the top portions 9 support the outer pipe 2 in the event of plastic deformation. Resultantly, a specific bush or the like is not required at deforming and bending can be applied.
  • a double pipe heat exchanger wherein only the center portions of the end edges of the bulges 3 on the outside in the radial directions touch the inner surface of the outer pipe 2 can further smoothen the flow of the second fluid 5 and accelerate the heat exchange. That is, the second fluid 5 can flow nearly all around the outer circumference of the bulges 3.
  • a double pipe heat exchanger of the same configuration is used as an oil cooler to cool oil with cooling water, it is possible to provide an oil cooler conforming to various pipes and flow channels and contributing to space-saving.
  • a method for producing a double pipe heat exchanger includes the processes of: inserting the inner pipe 1 into the outer pipe 2 while keeping the axis lines straight; welding only the opening rims 6 at both the ends of the inner pipe 1 in the axial direction of the axis line to the outer pipe 2; and successively bending the inner pipe 1 and the outer pipe 2 by applying external force.
  • the heat exchanger has an outer pipe 2 and an inner pipe 1 that is inserted into the outer pipe 2.
  • the inner pipe 1 is, except both the ends as shown in Fig. 1 , bent and formed into the shape of a three-leaf clover in cross section and the bulges 3 of the clover shape are bent into the shape of waves extending in the axial direction. Then the maximum radius of the clover shape is equal to the inner radius of the outer pipe 2. Both the ends of the inner pipe 1 are formed into a cylindrical shape and the outer diameter is equal to the inner diameter of the outer pipe 2. Further, three grooves 10 are formed at the outer circumference of the inner pipe 1 at the center portion.
  • the bulges 3 are formed into the shape of an inflated balloon as it is obvious from Fig. 3 and they communicate with one another at the axis line (the center of the inner pipe 1).
  • the width of each of the bulges 3 gradually increases up to the intermediate portion and then gradually decreases toward the tip thereof in the radius direction from the center of the inner pipe 1 to the outside. Then the inner pipe 1 is inserted into the outer pipe 2 so that only the top portions 9 at the tips may touch the outer pipe 2.
  • the inner pipe 1 is inserted into the outer pipe 2 in the state of keeping the axis lines straight. Successively, only the opening rims 6 at the ends of the inner pipe 1 are fixed to the opening ends of the outer pipe 2 by welding. On this occasion, the top portions 9 at the tips of the bulges 3 touch the inner surface of the outer pipe 2. The contact points of the top portions 9 are not bonded.
  • the pipes are bent in the state where the top portions 9 of the bulges 3 shown in Fig. 2 touch the inner surface of the outer pipe 2 to prevent the shape of the cross section of the outer pipe 2 from being extraordinarily deformed.
  • the whole body is bent as shown in Fig. 4 , for example.
  • the shape of the bending is formed so as to conform to the installation route of piping.
  • a double pipe heat exchanger thus bent is connected through flanges 8 as a part of the outlet pipe for the exhaust gas of an engine.
  • cooling water as the second fluid 5 flows in from one of the pair of pipes 11; flows between the inner pipe 1 and the outer pipe 2; and flows out from the other pipe 11.
  • an exhaust gas as the first fluid 4 flows in the inner pipe 1 and the exhaust gas is cooled with the cooling water.
  • the exhaust gas flows snakily in the bulges 3 where the exhaust gas flows comparatively easily.
  • the cooling water also flows snakily on the outside of the inner pipe 1.
  • the cooling water flows along the grooves 10 at the center portion of the inner pipe 1.
  • the double pipe heat exchanger can be used as an oil cooler in place of the EGR cooler.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
EP05704232A 2005-01-21 2005-01-21 Double pipe heat exchanger and method of manufacturing the same Not-in-force EP1840495B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2005/001179 WO2006077657A1 (ja) 2005-01-21 2005-01-21 二重管型熱交換器およびその製造方法

Publications (3)

Publication Number Publication Date
EP1840495A1 EP1840495A1 (en) 2007-10-03
EP1840495A4 EP1840495A4 (en) 2008-05-28
EP1840495B1 true EP1840495B1 (en) 2010-03-03

Family

ID=36692055

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05704232A Not-in-force EP1840495B1 (en) 2005-01-21 2005-01-21 Double pipe heat exchanger and method of manufacturing the same

Country Status (5)

Country Link
US (1) US20080141665A1 (ja)
EP (1) EP1840495B1 (ja)
CN (1) CN100510599C (ja)
DE (1) DE602005019787D1 (ja)
WO (1) WO2006077657A1 (ja)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4698417B2 (ja) * 2005-12-28 2011-06-08 株式会社デンソー 二重管の製造方法
DE202006013279U1 (de) * 2006-08-30 2008-01-17 Dolmar Gmbh Motorbetriebenes Arbeitsgerät
US8267033B2 (en) * 2008-01-22 2012-09-18 Lockheed Martin Corporation Clathrate glider with heat exchanger
GB0909221D0 (en) * 2009-04-30 2009-07-15 Eaton Fluid Power Gmbh Heat exchanger
KR101608996B1 (ko) * 2010-01-11 2016-04-05 엘지전자 주식회사 열 교환기
DE102010047092A1 (de) * 2010-10-01 2012-04-05 Gm Global Technology Operations Llc (N.D.Ges.D. Staates Delaware) Ladeluftkühleinrichtung für einen Verbrennungsmotor
CN102607300B (zh) * 2012-03-16 2013-08-28 赵晓东 螺旋折流板式套管换热器
DE102013007590A1 (de) * 2013-05-02 2014-11-06 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Interner Wärmetauscher für eine Kraftfahrzeug-Klimaanlage
CN103411454A (zh) * 2013-08-29 2013-11-27 哈尔滨工业大学 一种外凸式波节管错位布置的管式换热器
DE102017109191A1 (de) * 2017-04-28 2018-10-31 Faurecia Emissions Control Technologies, Germany Gmbh Komponente einer Abgasanlage und Verfahren zur Herstellung einer solchen Komponente
CN108225057A (zh) * 2018-02-11 2018-06-29 佛山科学技术学院 一种凹面换热管套管式换热器
JP7045303B2 (ja) * 2018-10-31 2022-03-31 株式会社クボタ 過給機付きエンジン

Family Cites Families (20)

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Publication number Priority date Publication date Assignee Title
US1787904A (en) * 1927-05-02 1931-01-06 Francis J Heyward Car heater
US1920059A (en) * 1932-05-16 1933-07-25 Buschbaum Fred Exhaust operated heater
US2259433A (en) * 1937-11-15 1941-10-14 Hoover Co Heat exchanger
US2204294A (en) * 1938-06-23 1940-06-11 Eclipse Aviat Corp Exhaust pipe
DE1129516B (de) * 1955-10-04 1962-05-17 Andre Huet Roehrenwaermetauscher, dessen Waermeaustauschflaeche aus vielen Paaren gleichachsig ineinander gesteckter Rohre besteht
US3105708A (en) * 1960-04-20 1963-10-01 Howard E Esty Water jacketed exhaust attachment for internal combustion engine
US3777343A (en) * 1971-03-11 1973-12-11 Spiral Tubing Corp Method for forming a helically corrugated concentric tubing unit
US4194560A (en) * 1976-03-19 1980-03-25 Nihon Radiator Co., Ltd. Oil cooler and method for forming it
US4437513A (en) * 1978-06-02 1984-03-20 Joseph Castiglioni Heat recovery apparatus
US4393926A (en) * 1981-04-06 1983-07-19 Appel Gary H Clover heat exchanger core
US5311661A (en) * 1992-10-19 1994-05-17 Packless Metal Hose Inc. Method of pointing and corrugating heat exchange tubing
JP2590250Y2 (ja) * 1992-10-20 1999-02-10 神鋼メタルプロダクツ株式会社 熱交換器
US5573062A (en) * 1992-12-30 1996-11-12 The Furukawa Electric Co., Ltd. Heat transfer tube for absorption refrigerating machine
JP2000161871A (ja) * 1998-11-25 2000-06-16 Toyota Motor Corp ２重配管式熱交換器
DE19909368C1 (de) * 1999-03-03 2000-08-10 Hde Metallwerk Gmbh Wärmetauscherrohr
JP2002013882A (ja) * 2000-06-30 2002-01-18 Matsushita Refrig Co Ltd 二重管式熱交換器とそれを用いた冷凍サイクル装置
US6488079B2 (en) * 2000-12-15 2002-12-03 Packless Metal Hose, Inc. Corrugated heat exchanger element having grooved inner and outer surfaces
CN2462328Y (zh) * 2000-12-20 2001-11-28 四平市巨元换热设备有限公司 可拆异型套管式换热器
JP2002228371A (ja) * 2001-02-06 2002-08-14 Hitachi Ltd 熱交換器
JP3079576U (ja) * 2001-02-14 2001-08-24 株式会社ティグ 熱交換器の伝熱管

Also Published As

Publication number Publication date
WO2006077657A1 (ja) 2006-07-27
US20080141665A1 (en) 2008-06-19
EP1840495A1 (en) 2007-10-03
DE602005019787D1 (de) 2010-04-15
EP1840495A4 (en) 2008-05-28
CN100510599C (zh) 2009-07-08
CN101103243A (zh) 2008-01-09

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