EP0781610B1 - Process for producing flat heat exchange tubes - Google Patents

Process for producing flat heat exchange tubes Download PDF

Info

Publication number
EP0781610B1
EP0781610B1 EP96120849A EP96120849A EP0781610B1 EP 0781610 B1 EP0781610 B1 EP 0781610B1 EP 96120849 A EP96120849 A EP 96120849A EP 96120849 A EP96120849 A EP 96120849A EP 0781610 B1 EP0781610 B1 EP 0781610B1
Authority
EP
European Patent Office
Prior art keywords
heat exchange
walls
flat
annular grooves
exchange tube
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.)
Expired - Lifetime
Application number
EP96120849A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0781610A2 (en
EP0781610A3 (en
Inventor
Yoshihiro Saito
Satoshi Hozumi
Takashi Tamura
Masashi Sakaguchi
Satoru Kaimura
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.)
Resonac Holdings Corp
Original Assignee
Showa Denko KK
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 Showa Denko KK filed Critical Showa Denko KK
Publication of EP0781610A2 publication Critical patent/EP0781610A2/en
Publication of EP0781610A3 publication Critical patent/EP0781610A3/en
Application granted granted Critical
Publication of EP0781610B1 publication Critical patent/EP0781610B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
    • B21B1/0805—Flat bars, i.e. having a substantially rectangular cross-section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/227—Surface roughening or texturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • 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
    • B21C37/151—Making tubes with multiple passages
    • 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
    • B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
    • B21C37/202—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls with guides parallel to the tube axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H8/00—Rolling metal of indefinite length in repetitive shapes specially designed for the manufacture of particular objects, e.g. checkered sheets
    • 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
    • F28D1/0308—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 the conduits being formed by paired plates touching each other
    • F28D1/0316—Assemblies of conduits in parallel
    • 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
    • F28F3/048—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 ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length

Definitions

  • the present invention relates to a process for producing flat heat exchange tubes, more particularly to flat heat exchange tubes for condensers, evaporators and like heat exchangers for use in car coolers.
  • the known method comprises rolling a metal sheet blank having a thickness greater than the wall thickness of the heat exchange tube to be produced with a pair of upper and lower rolling rolls one of which has parallel annular grooves and thereby reducing the thickness of the blank to the specified tube wall thickness with the peripheral surfaces of the rolling rolls to form a flat portion serving as at least one of the upper wall and the lower wall and form vertical ridges projecting from the flat portion integrally therewith and providing the reinforcing walls with the annular grooves.
  • the method described has the problem of using production equipment which is large-sized in its entirety since the metal sheet blank needs to be passed through a plurality of rolling mills.
  • the present invention provides a process for producing a flat heat exchange tube according to claim 1. Further modifications of this process are characterized by the subclaims 2 to 10.
  • a roll formed with parallel annular grooves and parallel shallow annular grooves between each two adjacent annular grooves be used as the central work roll or as each of the planetary work rolls to form heat transfer area increasing low ridges projecting from the flat portion integrally therewith when forming the vertical ridges projecting from the flat portion integrally therewith and providing the reinforcing walls with the annular grooves.
  • a roll formed with parallel annular grooves and projections provided at a predetermined interval in each of the grooves and having a height smaller than the depth of the groove be used as the central work roll or as each of the planetary work rolls, whereby when the vertical ridges projecting from the flat portion integrally therewith and providing the reinforcing walls are formed with the annular grooves, a plurality of cutouts are formed at the predetermined interval in the upper edge of each of the ridges for forming holes for effecting communication between the parallel refrigerant passages.
  • the communication holes in the reinforcing walls permit the refrigerant flowing through the parallel refrigerant passages to flow also widthwise of the flat heat exchange tube, whereby portions of the refrigerant are so mixed together as to eliminate refrigerant temperature differences between the passages.
  • the opening ratio which is the percentage of all the communication holes in each reinforcing wall to the wall is preferably 10 to 40%. When in this range, the opening ratio assures satisfactory thermal conductance, assuring the heat exchange tube of a greatly improved heat exchange efficiency. If the ratio is less than 10%, the thermal conductance does not increase, whereas even when the ratio exceeds 40%, the conductance no longer increases but only an increased coefficient of friction will result.
  • the opening ratio within the range of 10 to 40% is more preferably 10 to 30%, most preferably about 20%.
  • the communication holes are so sized in cross section as to permit the refrigerant to smoothly flow therethrough between the adjacent passages, to be free of the likelihood of becoming clogged with a flow of solder during brazing and not to impair the pressure resistance of the heat exchange tube.
  • the pitch of the communication holes is such that the holes will nct lower the pressure resistance of the tube while permitting the refrigerant to smoothly flow across the reinforcing walls.
  • the communication holes formed in the plurality of reinforcing walls are preferably in a staggered arrangement when seen from above.
  • the flat heat exchange tubes in the above condenser are those embodying the invention. Examples of flat heat exchange tubes embodying the invention will be described below.
  • all reinforcing walls are 10 to 40% in opening ratio which is the percentage of all communication holes formed in the reinforcing wall based on the wall.
  • the communication holes formed in a plurality of reinforcing walls are all in a staggered arrangement when seen from above.
  • the article to be brazed is degreased before brazing and thereafter coated with a brazing flux.
  • FIGS. 1 to 11 This embodiment is shown in FIGS. 1 to 11.
  • the process of this embodiment produces a flat heat exchange tube A, which as shown in FIGS. 1 to 3, comprises flat upper and lower walls 1, 2 to which fins are to be brased, vertical left and right side walls 3, 4 connected between opposite side edges of the walls 1, 2, and a plurality of reinforcing walls 5 arranged between the side walls 3, 4, connected between the upper and lower walls 1, 2, extending longitudinally of the tube A and spaced apart from one another by a predetermined distance.
  • the tube A has parallel refrigerant passages 6 in its interior. Between the adjacent reinforcing walls 5, heat transfer area increasing low ridges 7 are formed on the upper surface of the lower wall 2 integrally therewith.
  • a plurality of trapezoidal communication holes 8 are formed in the upper end of each wall 5 for effecting communication between the parallel refrigerant passages 6.
  • the central work roll 35 is rotated by unillustrated drive means.
  • the planetary work rolls 36 are rotatable with the central work roll 35 by an unillustrated gear device, such that the rotation of the roll 35 rotates all the planetary work rolls 36 at the same peripheral speed as the roll 35.
  • the finishing rolling mill 33 further has a trapezoidal guide shoe 37 between each pair of immediately adjacent planetary work rolls 36, and springs 38 for biasing the guide shoe 37 toward the central work roll 35.
  • Each of the front and rear edges of the guide shoe 37 extends into the clearance between the roll 35 and the roll 36 to such an extent that the shoe will not contact these rolls.
  • the aluminum sheet blank 30 of FIG. 9 has the thick wall portions 30a which are formed by causing one side of the blank opposite to the brazing material layer to project, whereas the brazing material layer side may conversely be caused to project, or both sides may be caused to project to form the thick portions.
  • Such intermediate products of heat exchange tubes are collectively brazed in combination with the headers and fins.
  • the upper member 20 placed over the ridges 13 is made to provide the upper wall 1 of a flat heat exchange tube A
  • the bent upward thin walls 15 of the upper member 20 are brazed to the stepped parts a of the respective upright portions 12 of the lower member 10 to make the upright portions 12 serve as the right and left side walls 4, 3
  • the ridges 13 of the lower wall 2 are brazed to the upper wall 1 to form the reinforcing walls 5
  • the openings of the trapezoidal cutouts 14 in the ridges 13 are closed with the upper wall 1 to thereby form the trapezoidal communication holes 8 for holding the parallel refrigerant passages 6 in communication with one another.
  • the flat heat exchange tube A is obtained.
  • the assembly of the upper and lower members 20, 10 as temporarily secured may be temporarily joined as by high-frequency brazing before the above brazing procedure.
  • the upper and lower members 20, 10 as temporarily attached to each other may be brazed to obtain a finished product of heat exchange tube.
  • the headers and fins may then be brazed to such tubes to assemble a heat exchanger.
  • upper and lower component members 112, 114 are butt-brazed as opposed to each other at the edges at each side, the upper and lower portions 85a, 110a, 85b, 110b having a circular-arc outer face are joined to obtain opposite side walls, with the flat portions 111, 113 of the upper and lower component members 112, 114 serving as upper and lower walls 86, 87, and the downward ridges 89a are brazed to the upward ridges 89b to form reinforcing walls 89, with cutout portions 90a, 90b of the ridges 89a, 89b combined to form hexagonal communication holes 90 at the midportion of height of the reinforcing walls 89 for causing parallel refrigerant passages 74 to communicate with one another therethrough.
  • a flat heat exchange tube AS is prepared.

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)
  • Metal Rolling (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP96120849A 1995-12-28 1996-12-23 Process for producing flat heat exchange tubes Expired - Lifetime EP0781610B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP342471/95 1995-12-28
JP34247195 1995-12-28
JP34247195A JP3381130B2 (ja) 1995-12-28 1995-12-28 偏平状熱交換管の製造方法

Publications (3)

Publication Number Publication Date
EP0781610A2 EP0781610A2 (en) 1997-07-02
EP0781610A3 EP0781610A3 (en) 1997-07-09
EP0781610B1 true EP0781610B1 (en) 2002-03-13

Family

ID=18354003

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96120849A Expired - Lifetime EP0781610B1 (en) 1995-12-28 1996-12-23 Process for producing flat heat exchange tubes

Country Status (14)

Country Link
EP (1) EP0781610B1 (zh)
JP (1) JP3381130B2 (zh)
KR (1) KR100478056B1 (zh)
CN (2) CN1153041C (zh)
AT (1) ATE214309T1 (zh)
AU (1) AU710857B2 (zh)
BR (1) BR9606189A (zh)
CA (1) CA2193933C (zh)
CZ (1) CZ294169B6 (zh)
DE (1) DE69619778T2 (zh)
ES (1) ES2171601T3 (zh)
IN (1) IN192202B (zh)
MY (1) MY114328A (zh)
ZA (1) ZA9610868B (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008051894A1 (de) 2008-10-16 2010-05-06 Behr Gmbh & Co. Kg Belastungsangepasstes Strukturteil aus Metall für einen Wärmetauscher, Verfahren zur Herstellung eines belastungsangepassten Strukturteils, Wärmetauscher

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100364532B1 (ko) * 1996-12-18 2003-03-03 엘지전자 주식회사 증발기용열교환기
JP4194241B2 (ja) * 1998-03-31 2008-12-10 昭和電工株式会社 圧延装置
US6739167B2 (en) 1998-03-31 2004-05-25 Showa Denko K.K. Work roll for use in rolling apparatus
WO2001023823A1 (en) 1999-09-29 2001-04-05 Norsk Hydro Asa Heat exchanger
US7421873B2 (en) 2003-05-20 2008-09-09 Showa Denko K.K. Rolling apparatus and method of making product of miscellaneous cross section with use of same
JP2007093144A (ja) * 2005-09-29 2007-04-12 Denso Corp 熱交換用チューブおよび熱交換器
CN101405560B (zh) * 2006-01-19 2011-06-08 摩丁制造公司 扁平管道、扁平管道热交换器及其制造方法
WO2008064263A2 (en) * 2006-11-22 2008-05-29 Johnson Controls Technology Company Multi-block circuit multichannel heat exchanger
CN100491058C (zh) * 2007-01-26 2009-05-27 中国电子科技集团公司第十四研究所 一种铝合金风冷冷板密封成型工艺
CN101085486B (zh) * 2007-07-11 2012-09-26 林展逸 汽车铝合金热交换器散热片的专用加工设备
CN101398274B (zh) * 2007-09-29 2012-07-25 卡特彼勒公司 经激光焊接的热交换器管组件
DE102010026280A1 (de) 2010-07-06 2012-01-12 Behr Gmbh & Co. Kg Verfahren zur Herstellung eines Rohres für einen Wärmetauscher, insbesondere für ein Kraftfahrzeug
CN102410469A (zh) * 2010-09-26 2012-04-11 佛山市国星光电股份有限公司 路灯灯头及制造方法
JPWO2012060461A1 (ja) * 2010-11-02 2014-05-12 日本電気株式会社 冷却装置及びその製造方法
CN102069360B (zh) * 2011-01-11 2012-11-21 湖州腾云制冷设备有限公司 一种金属管的加工方法
CN102172623A (zh) * 2011-01-17 2011-09-07 重庆大学 镁合金板材轧制轧辊装置
CN102764969B (zh) * 2011-05-05 2015-03-11 陈世明 压平散热器热管的方法及其设备
JP2014001867A (ja) * 2012-06-15 2014-01-09 Sanden Corp 熱交換器
CN103968700B (zh) * 2014-05-26 2016-08-24 赵耀华 一种高效换热水管以及热管辐射采暖/制冷系统
TWI582367B (zh) * 2015-04-01 2017-05-11 A hot plate and a method for manufacturing the same
CN106332512B (zh) * 2015-06-23 2018-10-12 奇鋐科技股份有限公司 液冷装置及系统
US9807906B2 (en) 2015-07-20 2017-10-31 Asia Vital Components Co., Ltd. Liquid-cooling device and system thereof
CN108474630A (zh) * 2015-10-29 2018-08-31 株式会社Uacj 铝制挤出扁平多孔管和换热器
WO2018017003A1 (en) * 2016-07-19 2018-01-25 Volvo Construction Equipment Ab A heat exchanger and a working machine
CN108036668B (zh) * 2017-12-07 2024-03-15 程向锋 换热管、包括它的换热器和换热管的制造方法
JP6991892B2 (ja) * 2018-02-27 2022-01-13 新光電気工業株式会社 ループ型ヒートパイプ
CN110542327B (zh) * 2018-05-29 2021-05-28 佳世诠股份有限公司 平板状的热交换器及冷冻装置
CN108844385B (zh) * 2018-06-15 2024-02-13 江苏英杰铝业有限公司 一种散热效果好的铝型材
CN112179179A (zh) * 2020-09-02 2021-01-05 东南大学 一种用于折线型印刷电路板式换热器的强化传热减阻节能换热板
DE102021106305A1 (de) * 2021-03-16 2022-09-22 Karlsruher Institut für Technologie (Körperschaft des öffentlichen Rechts) Verfahren zur Herstellung von Rohren mit topographischen Innenstrukturen
CN113340129A (zh) * 2021-06-10 2021-09-03 祥博传热科技股份有限公司 一种高效换热器及其加工工艺

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6250007A (ja) * 1985-08-28 1987-03-04 Dowa Mining Co Ltd ワンパス型連続多段圧延機
US4805693A (en) * 1986-11-20 1989-02-21 Modine Manufacturing Multiple piece tube assembly for use in heat exchangers
US5271151A (en) * 1990-04-23 1993-12-21 Wallis Bernard J Method of making a high pressure condenser
US5133205A (en) * 1990-11-13 1992-07-28 Mannesmann Aktiengesellschaft System and process for forming thin flat hot rolled steel strip
CN2128570Y (zh) * 1992-07-28 1993-03-24 王秀和 行星辊辗轧机
JP3364665B2 (ja) * 1993-03-26 2003-01-08 昭和電工株式会社 熱交換器用冷媒流通管

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008051894A1 (de) 2008-10-16 2010-05-06 Behr Gmbh & Co. Kg Belastungsangepasstes Strukturteil aus Metall für einen Wärmetauscher, Verfahren zur Herstellung eines belastungsangepassten Strukturteils, Wärmetauscher

Also Published As

Publication number Publication date
CN1160845A (zh) 1997-10-01
IN192202B (zh) 2004-03-13
JPH09182928A (ja) 1997-07-15
CA2193933C (en) 2005-11-08
EP0781610A2 (en) 1997-07-02
CZ383696A3 (en) 1997-12-17
CN1502428A (zh) 2004-06-09
ATE214309T1 (de) 2002-03-15
DE69619778T2 (de) 2002-09-19
ZA9610868B (en) 1997-06-27
KR100478056B1 (ko) 2005-07-04
AU7647996A (en) 1997-07-03
ES2171601T3 (es) 2002-09-16
BR9606189A (pt) 1998-08-18
CN100377807C (zh) 2008-04-02
KR970033204A (ko) 1997-07-22
EP0781610A3 (en) 1997-07-09
AU710857B2 (en) 1999-09-30
CZ294169B6 (cs) 2004-10-13
MY114328A (en) 2002-09-30
CA2193933A1 (en) 1997-06-29
CN1153041C (zh) 2004-06-09
MX9700009A (es) 1997-09-30
JP3381130B2 (ja) 2003-02-24
DE69619778D1 (de) 2002-04-18

Similar Documents

Publication Publication Date Title
EP0781610B1 (en) Process for producing flat heat exchange tubes
US5784776A (en) Process for producing flat heat exchange tubes
EP0815971B1 (en) Process for producing flat heat exchange tubes
EP0617250B1 (en) A method of producing a refrigerant tube for heat exchangers
EP0646231B1 (en) Heat exchange tubes
US5353868A (en) Integral tube and strip fin heat exchanger circuit
JP2001038439A (ja) チューブ用フラット・タービュレーター及びその製造方法
US5931226A (en) Refrigerant tubes for heat exchangers
EP0762070B1 (en) Refrigerant tubes for heat exchangers
US6837305B2 (en) Heat exchanger plates and manufacturing method
AU2004241202B2 (en) Rolling apparatus and method of making product of miscellaneous cross section with use of same
MXPA97000009A (en) Process for producing flat heat exchange tubes
JPH10238980A (ja) 熱交換器用フィン製造用薄板および熱交換器用フィン

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT CH DE ES FR GB IT LI SE

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT CH DE ES FR GB IT LI SE

17P Request for examination filed

Effective date: 19970930

17Q First examination report despatched

Effective date: 20000320

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SHOWA DENKO K K

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SHOWA DENKO K.K.

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE ES FR GB IT LI SE

REF Corresponds to:

Ref document number: 214309

Country of ref document: AT

Date of ref document: 20020315

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: PATENTANWALTSBUERO JEAN HUNZIKER

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69619778

Country of ref document: DE

Date of ref document: 20020418

ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2171601

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20021216

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20061206

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20061213

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20061220

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20061227

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20061228

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20061231

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20071210

Year of fee payment: 12

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20071223

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071223

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071224

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071231

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071223

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20071224

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071224

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20081219

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071223

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20090831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20081231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100701