EP1644682A1 - Tube de transfert thermique sous pression et son procede de fabrication - Google Patents

Tube de transfert thermique sous pression et son procede de fabrication

Info

Publication number
EP1644682A1
EP1644682A1 EP04742196A EP04742196A EP1644682A1 EP 1644682 A1 EP1644682 A1 EP 1644682A1 EP 04742196 A EP04742196 A EP 04742196A EP 04742196 A EP04742196 A EP 04742196A EP 1644682 A1 EP1644682 A1 EP 1644682A1
Authority
EP
European Patent Office
Prior art keywords
heat transfer
tube
transfer tube
wall
joint
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.)
Withdrawn
Application number
EP04742196A
Other languages
German (de)
English (en)
Inventor
Edward G. Rottmann
Donald L. Bennett
Timothy L. Goebel
Stieg Andersson
Liangyou Tang
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.)
Luvata Oy
Original Assignee
Outokumpu Copper Products Oy
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 Outokumpu Copper Products Oy filed Critical Outokumpu Copper Products Oy
Publication of EP1644682A1 publication Critical patent/EP1644682A1/fr
Withdrawn legal-status Critical Current

Links

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
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
    • F28F3/044—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being pontual, e.g. dimples
    • 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
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/0803—Making tubes with welded or soldered seams the tubes having a special shape, e.g. polygonal tubes
    • 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
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/156—Making tubes with wall irregularities
    • B21C37/158—Protrusions, e.g. dimples
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D13/00—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form
    • B21D13/04—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form by rolling
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/06—Fastening; Joining by welding

Definitions

  • the present invention relates to heat exchanger tubes and specifically to heat exchangers for use in high-pressure applications, such as hydraulic coolers, radiators, HVAC systems, and C0 2 systems.
  • the present invention meets the above described needs and overcomes the drawbacks by providing a heat transfer tube and a method of forming a heat transfer tube with indented portions formed in the opposed walls.
  • the indents may be cold welded or forge welded such that dimples or indentations meet in the middle of the tube.
  • the bottom of a first indentation disposed on a first side of the tube is welded to the bottom of a second indentation formed in the opposite side of the tube.
  • Fig. 1 is a partial perspective view of the tube of the present invention
  • Fig. 2 is a schematic representation of a roll forming apparatus for forming tube
  • Fig. 3 is a partial perspective view of an alternate embodiment of the tube of the present invention
  • Fig. 4 is another partial perspective view of the tube of the present invention
  • Fig. 5 is a schematic representation of a stamping process for forming indentations in the tube
  • Fig. 6 is a schematic representation of a pair of rolls for forming the indentations in the tube
  • Fig. 7 is a cross-sectional view taken along line 7-7 of Fig.
  • Fig. 8 is a plan view of a tube having indentations with various shapes
  • Fig. 9a is a plan view of an alternate embodiment of the tube of the present invention
  • Fig. 9b is a section view according to line IXB-IXB of Fig. 9a
  • Fig. 10 is a cross-sectional view of a tube of the present invention having a joint thickness equal to zero
  • Fig. 11 is a cross-sectional view of an alternate embodiment of the bottom walls of the indentations
  • Fig. 12 is a partial perspective view of a tube of the present invention having different indentations in different zones I, II, III and IV of the tube along the tube axis. DETAILED DESCRIPTION In Fig.
  • a tube 1 has major outer surfaces 200 formed on the outside of opposed walls 2a and 2b. Walls 2a and 2b are connected by curved walls. Walls 2a and 2b also have inner surfaces.
  • the tube 1 may be constructed out of copper or other suitable materials.
  • the tube 1 may be formed by several methods as will be evident to those of ordinary skill in the art. For example as shown in Fig. 2, tube 1 may be formed by taking flat stock 203 and roll forming 204 it by turning up the edges gradually and then welding a seam 206 to join the edges. The seam is welded in a continuous process by an apparatus 209. Apparatus for continuous welding of tubes are generally known and therefore will not be described in detail herein.
  • the tube 1 may then be flattened by a press 210 to form a flat tube having opposed walls 2a and 2b.
  • the tube may be formed into a flat tube configuration and welded to shape.
  • other processes for forming the tube 1 such as by drawing or extruding may also be suitable as will be evident to those of ordinary skill in the art.
  • the invention has been illustrated in connection with a tube having substantially flat opposed major surfaces, the present invention is also suitable for tubes having major surfaces that are non- flat.
  • opposed major surfaces on tube 201 may include sections 212 curved inwardly.
  • Other profiles are also included in the present invention. In Fig.
  • the tube 1 may have a width W in the range of one-half inch to 5 inches (12.7 to 127 mm).
  • the height H of the tube may range from 1.5 mm to 5 mm.
  • Indentations 3a and 3b are formed from the outside through a cold weld or forge welding process.
  • the cold weld may be formed by a stamping process.
  • a pair of opposed dies 12 (Fig. 5) having raised surfaces 14 are arranged such that they stamp the major surfaces of the tube 1 in alignment on opposite sides of the tube 1.
  • the opposed indentations are welded together at the joint 17 where the bottom surface of each indentation meets.
  • the tube 1 may be heated prior to stamping to provide a forge welding process.
  • electrical current EC may be passed through the tube 1 during the cold or forge welding process.
  • the opposed indentations 3a and 3b may be welded by means of a pair of rolls 20 having raised surfaces 23 for embossing/deforming the tube 1.
  • the raised surfaces 23 on the rolls 20 are aligned such that the indentations 3a and 3b on opposite major surfaces of the tube 1 are welded together at the joint 17 where the bottom surface of each indentation meets.
  • the tube 1 is passed through the rolls 20 in the direction indicated by arrows 21. In the roll process described above, the tube 1 may also be heated prior to engaging with the roll 20. Also, electric current may be passed through the tube 1 during the roll process.
  • the indentations 3a, 3b formed on the opposite side of the tube 1 are disposed in registry such that the bottom of each indentations 3a is cold welded to the bottom of the indentation 3b to form a plurality of column portions 4. Due to the column portions 4, turbulence of refrigerant occurs, thereby improving the heat transfer capability.
  • the tube 1 has first wall 2a and second wall 2b defining major surfaces 200 which are substantially parallel to each other and disposed in spaced apart relation.
  • a refrigerant path 24 is formed in the space surrounded by the first and second walls.
  • a plurality of indentations 3a and 3b are formed by protruding relevant portions from the outside of each of the opposed first and second walls 2a and 2b, thus, a plurality of protrusions 25 corresponding to the indentations 3a, 3b are formed at the refrigerant path 24 side.
  • each indentation has an elliptical shape, the major axis of the ellipse being along the longitudinal axis 29 of tube 1.
  • the heads of the opposed indentations 3a and 3b are made to contact each other in weld area 220, so that column portions 4 are formed between the first and second walls 2a and 2b, and each has an elliptical cross-sectional shape.
  • the cross-sectional shape of the column portions 4 is not limited to an ellipse, but circles, ovals or the like are also possible.
  • the shape or geometry of the joint 17 may also include other shapes such as diamond 30, triangle 33, teardrop 36, double teardrop 39, hexagons 40, ovals 41 and including, but not limited to, polyhedral shapes.
  • the equivalent diameter D e 4 A/C (where A equals the total area of the joint and C equals the length of a line encircling the joint).
  • the equivalent diameter is in the range of 0.5 mm to 30 mm.
  • the area of the joint 17 (I x w as shown in Fig.
  • substantially round joints 42 resulting from the indentations 3a are formed in offset rows disposed along the longitudinal axis 29 of tube 1.
  • the percent of the major surface 200 that is occupied by joints 42 may range between 2-80%.
  • the joint thickness ranges from about 180% of the tube wall thickness down to zero.
  • the wall thickness ranges down to zero because the opposed indentation 3a, 3b may cut all the way through the tube 1 such that a slug 50 is separated from the tube 1. When this occurs, the opposed walls seal around the opening 53 where the slug 50 has been removed.
  • the pitch P (Fig.
  • the opposed surfaces at the bottom of the indentations 3a and 3b where the welds occur may be provided with either flat or non-flat surfaces.
  • the opposed indentations may be provided with ridged surfaces 65 having complementary shapes for increasing the surface area where the opposed indentations 3a, 3b engage for welding.
  • Other forms including male and female surfaces or the like are also suitable.
  • the inside surface of the tube 1 may be smooth or it may be provided with internal enhancements such as fins disposed either axially or helically and with or without cross-hatching.
  • the tube shown in Fig. 9 has a consistent pattern of joints 42.
  • the major surfaces of the tube may be divided into successive regions 70, 73, 76 and 79 along the longitudinal or tube axis 29.
  • Each individual region may be provided with a different arrangement for the joints as described above in order to alter the heat transfer characteristics of the tube 1.
  • the arrangement of the joints may be varied along the axis 29 in order to provide for varying vapor quality along the length of the tube 1.
  • Joints are disposed in region 70.
  • Joints are disposed in region 73.
  • joints 100 in region 70 are larger than joints 103 in region 73.
  • the joint density for region 73 is greater than for region 70.
  • region 76 has joints, which are larger and less dense than joints in region 73.
  • Region 79 has joints, which are the smallest and most dense out of any of the regions.
  • the joint density may increase, decrease or alternate along the successive regions.
  • the joint size may increase, decrease or alternate in similar fashion.
  • the joint shapes may vary in the successive regions in the axial direction.
  • factors that contribute to the weld include the surface cleanliness (the surface should be clean and without oxidation), the rate of deformation at the joint, the total deformation for the joined surfaces, the surface area prior to joining, and the localized deformation within each joint.
  • the impact range, the quantity of force and the speed of the force appear to be the most significant factors. It has been determined that an internally grooved copper tube with a welded seam performs particularly well with respect to cold welding, however, other types of heat transfer tubes are also suitable for the present invention.
  • the above-described methods and apparatus provide joints formed by opposed indentations.
  • the joints improve the heat transfer performance of high pressure HVACR tubes and provide performance in both phases while maintaining acceptable pressure drop to maximize heat transfer and flow performance.
  • the joints may be formed by any type of cold welding as will be evident to those of ordinary skill in the art.
  • the joints may also be forge welded.
  • the joints are formed by metalworking processes that do not require metal cutting, brazing or the addition of filler materials.
  • the term "welded” as used in this specification refers to a coalescence of metals characterized by a permanent deformation at the interface.
  • the present invention has been described primarily in connection with a flat copper tube, however, the invention applies equally to other materials and other profiles of tubing.

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)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

La présente invention a trait à un tube de transfert thermique et un procédé de formation d'un tube de transfert thermique avec des entailles formées dans les parois opposées. Les entailles peuvent être soudées à froid ou soudées à la forge de sorte que les encoches ou entailles se croisent au milieu du tube. Le fond d'une première entaille disposée sur une première face du tube est soudée au fond d'une deuxième entaille formée sur la face opposée du tube.
EP04742196A 2003-07-15 2004-07-14 Tube de transfert thermique sous pression et son procede de fabrication Withdrawn EP1644682A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US48742903P 2003-07-15 2003-07-15
PCT/FI2004/000453 WO2005005904A1 (fr) 2003-07-15 2004-07-14 Tube de transfert thermique sous pression et son procede de fabrication

Publications (1)

Publication Number Publication Date
EP1644682A1 true EP1644682A1 (fr) 2006-04-12

Family

ID=34062156

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04742196A Withdrawn EP1644682A1 (fr) 2003-07-15 2004-07-14 Tube de transfert thermique sous pression et son procede de fabrication

Country Status (4)

Country Link
US (1) US20050067156A1 (fr)
EP (1) EP1644682A1 (fr)
CN (1) CN1826503A (fr)
WO (1) WO2005005904A1 (fr)

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US20090087604A1 (en) * 2007-09-27 2009-04-02 Graeme Stewart Extruded tube for use in heat exchanger
SE533947C2 (sv) * 2008-09-30 2011-03-08 Suncore Ab Värmeöverföringselement och anordning för kylning av solceller
BR112012017291B1 (pt) 2010-01-15 2020-03-17 Rigidized Metals Corporation Método para formar uma parede com superfície melhorada
US8875780B2 (en) * 2010-01-15 2014-11-04 Rigidized Metals Corporation Methods of forming enhanced-surface walls for use in apparatae for performing a process, enhanced-surface walls, and apparatae incorporating same
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CN103649664B (zh) 2011-02-14 2017-08-15 马西米亚诺·比松 用于工厂等的辐射管状元件
TWI476361B (zh) * 2011-06-30 2015-03-11 Chin Wen Wang 均溫板毛細成型方法及其結構
FR2993354B1 (fr) * 2012-07-13 2018-07-13 Delphi Automotive Systems Lux Refroidisseur d'air de suralimentation
DE102013102561A1 (de) * 2013-03-13 2014-09-18 Erk Eckrohrkessel Gmbh Einrichtung zur Aufnahme eines Volumenstromes eines Mediums und Verfahren zur Realisierung eines Volumenstromes eines Mediums
US20170051988A1 (en) * 2015-08-21 2017-02-23 Halla Visteon Climate Control Corp. Heat exchanger with turbulence increasing features
CN109297100A (zh) * 2018-11-20 2019-02-01 英特换热设备(浙江)有限公司 一种空调末端设备
CN210136909U (zh) * 2019-06-18 2020-03-10 宁德时代新能源科技股份有限公司 温控组件及电池包
DE102020207067A1 (de) 2020-06-05 2021-12-09 Mahle International Gmbh Flachrohr und Wärmeübertrager mit einem Flachrohr

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Also Published As

Publication number Publication date
CN1826503A (zh) 2006-08-30
WO2005005904A1 (fr) 2005-01-20
US20050067156A1 (en) 2005-03-31

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