US20090120617A1 - Tube For Heat Exchanger - Google Patents

Tube For Heat Exchanger Download PDF

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Publication number
US20090120617A1
US20090120617A1 US12/259,677 US25967708A US2009120617A1 US 20090120617 A1 US20090120617 A1 US 20090120617A1 US 25967708 A US25967708 A US 25967708A US 2009120617 A1 US2009120617 A1 US 2009120617A1
Authority
US
United States
Prior art keywords
tube
loop
thickness
flat section
followed
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.)
Abandoned
Application number
US12/259,677
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English (en)
Inventor
Christophe DENOUAL
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.)
Valeo Systemes Thermiques SAS
Original Assignee
Valeo Systemes Thermiques SAS
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 Valeo Systemes Thermiques SAS filed Critical Valeo Systemes Thermiques SAS
Assigned to VALEO SYSTEMES THERMIQUES reassignment VALEO SYSTEMES THERMIQUES ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DENOUAL, CHRISTOPHE
Publication of US20090120617A1 publication Critical patent/US20090120617A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
    • F28D1/0391—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits a single plate being bent to form one or more conduits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/14—Making tubes from double flat material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
    • B23K1/0012—Brazing heat exchangers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
    • B23K33/004—Filling of continuous seams
    • B23K33/006—Filling of continuous seams for cylindrical workpieces

Definitions

  • the present invention relates to a tube for a heat exchanger.
  • the invention has a particularly advantageous application in the field of flat tube heat exchangers.
  • These exchangers are notably used as evaporators, condensers or forced air heaters in an air conditioning system of a motor vehicle, or as a radiator in the cooling circuit of such a vehicle.
  • Flat tube heat exchangers for motor vehicles are generally constituted by an array of flat tubes disposed parallel with each other in one or more rows, these tubes being intended for the circulation through the exchanger of a heat transfer fluid, such as water with added glycol in the case of radiators of engine cooling circuits.
  • a heat transfer fluid such as water with added glycol
  • the water with added glycol is circulated in the tubes of the radiator and is cooled by heat exchange with cool air coming from a propelling device, or fan, the heat exchange being favored by the presence of heat exchange elements disposed in the array of tubes.
  • the thermal energy dissipated in the air is retrieved in order to heat the passenger compartment of a motor vehicle via a ventilation, heating and/or air conditioning system which is known per se.
  • the tubes are brazed onto heat exchange elements constituted by spacers or fins placed between the tubes.
  • these spacers are produced in the form of an undulating surface, the tubes being brazed onto the spacers at the peaks of the undulations.
  • the assembly of the tubes and the spacers thus assembled by brazing is capped at each end by a collector box connected by pipes to the rest of the circuit.
  • the flat tubes can be obtained by various techniques, like extrusion, mechanized welding or folding.
  • the invention applies to this latter technique in which each flat tube is produced by folding a metal sheet called a strip in order to define a circulation duct for the heat transfer fluid, water in this instance.
  • the strip is constituted from a base material otherwise called the core, generally an aluminum alloy.
  • the international application No WO 03/046456 proposes in particular a flat tube with a separating partition, produced from a strip of which one end has been shaped such that the separating partition obtained after folding the strip has a curvilinear profile, substantially semicircular in shape.
  • the flat tube known from the international application No WO 03/046456 nevertheless has the disadvantage of offering only a low mechanical resistance to the inflation of the tube resulting from the pressure applied by the heat transfer fluid.
  • its curvilinear arc-of-circle shape provides the separating partition with a certain flexibility favoring its opening up and therefore the inflation of the tube under the action of hydraulic pressure.
  • the opening up of the separating partition has the consequence of creating an asymmetry between the two circulation channels situated on either side of the partition, whereas the hydraulic cross-sections of the channels must be equal and remain so no matter what the operating phase of the heat exchanger may be.
  • the inflation of the tube under pressure generates mechanical stresses at several places, notably along the radii of the tube and on the longitudinal weld at the junction between the two folded parts of the tube.
  • one objective of the invention is to propose a tube for a heat exchanger which would make it possible to avoid the disadvantages related to the inflation under pressure of the tube described in the abovementioned international application, whilst retaining the advantages of this tube, such as being free of dimensional tolerance constraints in the width of the strip and/or the cladding with a brazing material on just one of the two faces of the core.
  • a tube for a heat exchanger produced by folding a strip, one end of said strip being shaped in such a way as to constitute, after folding, a separating partition having a curvilinear profile, noteworthy in that said curvilinear profile is a looped profile, said separating partition being closed on itself.
  • This feature is explained by the fact that the edge of the strip used in the separating partition is sandwiched in a U-shaped fold, which makes it possible to put the cladding in contact with the inside surface of the tube having no cladding and thus to widen the brazing in order to achieve a high level of resistance to inflation.
  • said looped curvilinear profile comprises a first part of loop and a second part of loop ending inside the first part of loop.
  • the invention makes provision for said first and second parts of loop to have substantially an arc-of-circle shape in which the thickness of the strip is constant.
  • the invention therefore provides for said separating partition to have along said loop a thickness less than the thickness of the tube, or again for said separating partition to have a first thickness less than the thickness of the tube over the first part of loop, and a second thickness less than the first thickness over the second part of loop.
  • FIG. 1 is a partial cross-sectional view of a tube for a heat exchanger according to the invention.
  • FIG. 2 a is a partial cross-sectional view of a strip according to a first embodiment of the invention.
  • FIG. 2 b is a partial cross-sectional view of a strip according to a second embodiment of the invention.
  • FIG. 1 there is shown partially in cross-section a flat tube 10 for a heat exchanger which can indifferently be an evaporator, a condenser, a forced air heater or a radiator of a motor vehicle.
  • the tube 10 is obtained by shaping and folding a strip 11 produced from a base material, or core material, which is generally an aluminum alloy chosen from the series referenced 1xxx, 3xxx, 6xxx and 7xxx and whose melting temperature is between 630 and 660° C.
  • the strip 11 receives, on a first face 111 which after folding constitutes the outside surface of the tube 10 , a layer 21 of added material or cladding material, often call a “clad”, constituted by an aluminum alloy of the series 4xxx whose melting temperature is higher than 577° C. and lower than the melting temperature of the core metal.
  • This layer 21 represents the actual brazing layer which, by melting the added material in a furnace, will provide the mechanical holding together of the heat exchanger whose components, flat tubes and spacers in particular, are previously assembled. This brazing layer 21 is shown in bold line in the figures.
  • This material notably based on aluminum and silicon, has a melting temperature higher than that of the brazing material or “clad”.
  • This protective layer 22 is shown in dotted line in the figures.
  • one end or edge 13 of the strip 11 is shaped in such a way as to produce, after folding, a partition 12 separating the tube 10 into two channels 31 , 32 for the circulation of heat transfer fluid.
  • the separating partition 12 is closed upon itself in a looped curvilinear profile comprising a first part 12 a of loop substantially having an arc-of-circle shape and a second part 12 b of loop also substantially having an arc-of-circle shape ending inside the first part 12 a of loop.
  • the arcs of circle have a curvature of about 180°.
  • the separating partition comprises a first fold 41 at 45° towards the inside of the tube (clockwise direction) followed by a first flat section 42 and then a second fold 43 at 45° turned towards the outside of the tube (anticlockwise direction), after which there is a second flat section 44 which receives the edge of the strip not used in the separating partition.
  • This second flat section 44 is an element of the first part of loop 12 a turned through 180° towards the inside of the tube, followed by a third flat section 45 whose outside surface makes contact with the inside surface of the tube.
  • This third flat section 45 is common to the first and to the second parts of loop 12 a and 12 b.
  • the profile of the separating partition continues by the curvature of the second part of loop 12 b turned through 180° towards the inside of the tube (clockwise direction) and ends at the edge of the strip 46 sandwiched between the second flat section 44 and the third flat section 45 .
  • the hydraulic cross-section of the channels 31 , 32 can be obtained by adjusting the thicknesses of the partition 12 over the first 12 a and second 12 b parts of loop.
  • the partition 12 can have a constant thickness e 2 along the loop (or the edge of the strip), this thickness being less than the thickness e 1 of the tube 10 .
  • the strip 11 has at the end or edge 13 a step change in thickness or shoulder between the values e 1 and e 2 .
  • the partition 12 has a first thickness e 2 less than the thickness e 1 of the tube 10 over the first part 12 a of loop and a second thickness e 3 less than the first thickness e 2 over the second part 12 b of loop.
  • FIG. 2 b shows two steps in thickness on the strip 11 , one of them between the values e 1 and e 2 , and the other one between the values e 2 and e 3 .
  • the thickness values are:

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US12/259,677 2007-10-31 2008-10-28 Tube For Heat Exchanger Abandoned US20090120617A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0707650A FR2923002B1 (fr) 2007-10-31 2007-10-31 Tube pour echangeur thermique
FRFR07/07650 2007-10-31

Publications (1)

Publication Number Publication Date
US20090120617A1 true US20090120617A1 (en) 2009-05-14

Family

ID=39016553

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/259,677 Abandoned US20090120617A1 (en) 2007-10-31 2008-10-28 Tube For Heat Exchanger

Country Status (8)

Country Link
US (1) US20090120617A1 (zh)
EP (1) EP2056054B1 (zh)
JP (1) JP2009109183A (zh)
KR (1) KR101647509B1 (zh)
CN (1) CN101487673B (zh)
ES (1) ES2616304T3 (zh)
FR (1) FR2923002B1 (zh)
MX (1) MX2008014000A (zh)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2486788A (en) * 2010-12-22 2012-06-27 Denso Marston Ltd A heat exchanger, a tube for a heat exchanger, a method of making a tube for a heat exchanger and a method of making a heat exchanger
US20150107812A1 (en) * 2011-03-31 2015-04-23 Valeo Systemes Thermiques Heat Exchanger Tube, And Corresponding Heat Exchanger Production Method
DE102014200708A1 (de) * 2014-01-16 2015-07-16 MAHLE Behr GmbH & Co. KG Flachrohr
US20150219405A1 (en) * 2014-02-05 2015-08-06 Lennox Industries Inc. Cladded brazed alloy tube for system components

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2969018B1 (fr) * 2010-12-20 2012-12-21 Valeo Systemes Thermiques Procede de brasage pour echangeur thermique, tube et echangeur thermique correspondants
CN106679240A (zh) * 2015-11-11 2017-05-17 丹佛斯微通道换热器（嘉兴）有限公司 换热器和换热管

Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5361829A (en) * 1991-12-19 1994-11-08 Behr Gmbh & Co. Corrugated fin for flat-tube heat exchangers
US5558159A (en) * 1993-11-24 1996-09-24 Zexel Corporation Header tank structure for heat exchanger
US5669440A (en) * 1994-12-24 1997-09-23 Behr Gmbh & Co. Heat exchanger having a welded pipe which has a reduced wall thickness at location of the weld seam
US5799727A (en) * 1997-05-29 1998-09-01 Ford Motor Company Refrigerant tubes for heat exchangers
US20020005281A1 (en) * 2000-07-11 2002-01-17 Andrzej Krupa Heat exchanger and fluid pipe therefor
US6453711B2 (en) * 1999-07-01 2002-09-24 Visteon Global Technologies, Inc. Flat turbulator for a tube and method of making same
US6668916B2 (en) * 2001-09-25 2003-12-30 Modine Manufacturing Company Flat tube block heat exchanger
US20040007040A1 (en) * 2002-05-14 2004-01-15 Jan Ibron Method and tool for folding a metal strip
US6688382B2 (en) * 2001-01-23 2004-02-10 Emerson & Renwick Limited Heat exchanger tube
US20050006082A1 (en) * 2003-06-21 2005-01-13 Viktor Brost Flat heat exchanger tube
US20050092476A1 (en) * 2003-10-31 2005-05-05 Valeo Inc Folded tube for a heat exchanger and method of making same
US6974634B2 (en) * 2003-11-05 2005-12-13 Material Sciences Corporation Metal felt laminates
US6988539B2 (en) * 2000-01-07 2006-01-24 Zexel Valeo Climate Control Corporation Heat exchanger
US20060086491A1 (en) * 2004-10-25 2006-04-27 Denso Corporation Heat exchanger and method of manufacturing the same
US20060278291A1 (en) * 2002-12-18 2006-12-14 Dietmar Baumhoff Pipe element, especially for exhaust pipes in motor vehicles, and method for producing the same
US20070144722A1 (en) * 2003-12-19 2007-06-28 Yoshifumi Matsuzaki Tube production method, heat-exchange tube produced by the method and heat exchanger using the heat-exchange tube
US20090126921A1 (en) * 2005-05-30 2009-05-21 Damien Berges Method For Brazing A Heat Exchanger Folded Tube While Applying A Flux Near A Contact Zone Of The Walls, Resulting Tube
US20100051252A1 (en) * 2007-07-11 2010-03-04 Denso Corproation Heat exchanger

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1188889A (zh) * 1997-01-20 1998-07-29 株式会社杰克塞尔 热交换器用管
FR2832788B1 (fr) * 2001-11-26 2004-06-04 Valeo Climatisation Profils de tubes pour echangeur thermique
DE10201511A1 (de) * 2002-01-17 2003-07-31 Behr Gmbh & Co Geschweißtes Mehrkammerrohr
JP2005037062A (ja) * 2003-07-15 2005-02-10 Toyo Radiator Co Ltd アルミニューム製熱交換器
JP2005337527A (ja) * 2004-05-24 2005-12-08 Calsonic Kansei Corp 熱交換器の偏平チューブ

Patent Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5361829A (en) * 1991-12-19 1994-11-08 Behr Gmbh & Co. Corrugated fin for flat-tube heat exchangers
US5558159A (en) * 1993-11-24 1996-09-24 Zexel Corporation Header tank structure for heat exchanger
US5669440A (en) * 1994-12-24 1997-09-23 Behr Gmbh & Co. Heat exchanger having a welded pipe which has a reduced wall thickness at location of the weld seam
US5799727A (en) * 1997-05-29 1998-09-01 Ford Motor Company Refrigerant tubes for heat exchangers
US6453711B2 (en) * 1999-07-01 2002-09-24 Visteon Global Technologies, Inc. Flat turbulator for a tube and method of making same
US6988539B2 (en) * 2000-01-07 2006-01-24 Zexel Valeo Climate Control Corporation Heat exchanger
US20020005281A1 (en) * 2000-07-11 2002-01-17 Andrzej Krupa Heat exchanger and fluid pipe therefor
US6688382B2 (en) * 2001-01-23 2004-02-10 Emerson & Renwick Limited Heat exchanger tube
US6668916B2 (en) * 2001-09-25 2003-12-30 Modine Manufacturing Company Flat tube block heat exchanger
US20040007040A1 (en) * 2002-05-14 2004-01-15 Jan Ibron Method and tool for folding a metal strip
US20060278291A1 (en) * 2002-12-18 2006-12-14 Dietmar Baumhoff Pipe element, especially for exhaust pipes in motor vehicles, and method for producing the same
US20050006082A1 (en) * 2003-06-21 2005-01-13 Viktor Brost Flat heat exchanger tube
US20050092476A1 (en) * 2003-10-31 2005-05-05 Valeo Inc Folded tube for a heat exchanger and method of making same
US6974634B2 (en) * 2003-11-05 2005-12-13 Material Sciences Corporation Metal felt laminates
US20070144722A1 (en) * 2003-12-19 2007-06-28 Yoshifumi Matsuzaki Tube production method, heat-exchange tube produced by the method and heat exchanger using the heat-exchange tube
US20060086491A1 (en) * 2004-10-25 2006-04-27 Denso Corporation Heat exchanger and method of manufacturing the same
US20090126921A1 (en) * 2005-05-30 2009-05-21 Damien Berges Method For Brazing A Heat Exchanger Folded Tube While Applying A Flux Near A Contact Zone Of The Walls, Resulting Tube
US20100051252A1 (en) * 2007-07-11 2010-03-04 Denso Corproation Heat exchanger

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Machine Translation of JP 2005-337527 provided by Japanese Patatent Office, April 2013. *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2486788A (en) * 2010-12-22 2012-06-27 Denso Marston Ltd A heat exchanger, a tube for a heat exchanger, a method of making a tube for a heat exchanger and a method of making a heat exchanger
GB2486671A (en) * 2010-12-22 2012-06-27 Denso Marston Ltd A Heat Exchanger, a Tube for a Heat Exchanger, a Method of making a tube for a Heat Exchanger and a Method of Making a Heat Exchanger
GB2486788B (en) * 2010-12-22 2016-12-07 Denso Marston Ltd A heat exchanger,a tube for a heat exchanger,a method of making a tube for a heat exchanger and a method of making a heat exchanger
US20150107812A1 (en) * 2011-03-31 2015-04-23 Valeo Systemes Thermiques Heat Exchanger Tube, And Corresponding Heat Exchanger Production Method
US10989485B2 (en) * 2011-03-31 2021-04-27 Valeo Systemes Thermiques Heat exchanger tube, and corresponding heat exchanger production method
DE102014200708A1 (de) * 2014-01-16 2015-07-16 MAHLE Behr GmbH & Co. KG Flachrohr
US20150219405A1 (en) * 2014-02-05 2015-08-06 Lennox Industries Inc. Cladded brazed alloy tube for system components

Also Published As

Publication number Publication date
KR101647509B1 (ko) 2016-08-10
EP2056054B1 (fr) 2016-11-30
ES2616304T3 (es) 2017-06-12
KR20090045028A (ko) 2009-05-07
JP2009109183A (ja) 2009-05-21
FR2923002B1 (fr) 2015-12-11
MX2008014000A (es) 2009-05-11
EP2056054A1 (fr) 2009-05-06
FR2923002A1 (fr) 2009-05-01
CN101487673B (zh) 2012-06-27
CN101487673A (zh) 2009-07-22

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Date Code Title Description
AS Assignment

Owner name: VALEO SYSTEMES THERMIQUES, FRANCE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DENOUAL, CHRISTOPHE;REEL/FRAME:022154/0529

Effective date: 20090105

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION