SE519062C2 - Sätt att sammanlöda tunna värmeväxlarplattor samt lödd plattvärmeväxlare framställd enligt sättet - Google Patents

Sätt att sammanlöda tunna värmeväxlarplattor samt lödd plattvärmeväxlare framställd enligt sättet

Info

Publication number
SE519062C2
SE519062C2 SE0101573A SE0101573A SE519062C2 SE 519062 C2 SE519062 C2 SE 519062C2 SE 0101573 A SE0101573 A SE 0101573A SE 0101573 A SE0101573 A SE 0101573A SE 519062 C2 SE519062 C2 SE 519062C2
Authority
SE
Sweden
Prior art keywords
solder
plates
heat exchanger
soldering
base material
Prior art date
Application number
SE0101573A
Other languages
English (en)
Swedish (sv)
Other versions
SE0101573L (sv
SE0101573D0 (sv
Inventor
Jens Erik Johannes Rassmus
Per Erik Sjoedin
Original Assignee
Alfa Laval Corp Ab
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20283987&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=SE519062(C2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Alfa Laval Corp Ab filed Critical Alfa Laval Corp Ab
Priority to SE0101573A priority Critical patent/SE519062C2/sv
Publication of SE0101573D0 publication Critical patent/SE0101573D0/xx
Priority to KR1020107011787A priority patent/KR20100076051A/ko
Priority to ES02728297.9T priority patent/ES2322943T5/es
Priority to JP2002587149A priority patent/JP4805529B2/ja
Priority to EP02728297.9A priority patent/EP1383624B2/en
Priority to PL366607A priority patent/PL202715B1/pl
Priority to CNB028093194A priority patent/CN100496842C/zh
Priority to PT02728297T priority patent/PT1383624E/pt
Priority to US10/476,561 priority patent/US7685716B2/en
Priority to PCT/SE2002/000886 priority patent/WO2002090032A1/en
Priority to AU2002258329A priority patent/AU2002258329B2/en
Priority to SI200230807T priority patent/SI1383624T1/sl
Priority to KR1020037014279A priority patent/KR100977953B1/ko
Priority to CA2445665A priority patent/CA2445665C/en
Priority to AT02728297T priority patent/ATE426477T2/de
Priority to DK02728297.9T priority patent/DK1383624T4/da
Priority to DE60231706T priority patent/DE60231706D1/de
Publication of SE0101573L publication Critical patent/SE0101573L/xx
Publication of SE519062C2 publication Critical patent/SE519062C2/sv
Priority to JP2009082108A priority patent/JP5480521B2/ja

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
    • F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
    • 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
    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/02—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the heat-exchange media travelling at an angle to one another
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • B23K2101/14—Heat exchangers
    • 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
    • F28F2275/04—Fastening; Joining by brazing
    • 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
    • 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
    • Y10T29/49359—Cooling apparatus making, e.g., air conditioner, refrigerator
    • 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
    • Y10T29/49393—Heat exchanger or boiler making with metallurgical bonding

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Arc Welding In General (AREA)
  • Heat Treatment Of Articles (AREA)
SE0101573A 2001-05-03 2001-05-03 Sätt att sammanlöda tunna värmeväxlarplattor samt lödd plattvärmeväxlare framställd enligt sättet SE519062C2 (sv)

Priority Applications (18)

Application Number Priority Date Filing Date Title
SE0101573A SE519062C2 (sv) 2001-05-03 2001-05-03 Sätt att sammanlöda tunna värmeväxlarplattor samt lödd plattvärmeväxlare framställd enligt sättet
DK02728297.9T DK1383624T4 (da) 2001-05-03 2002-05-03 Fremgansmåde til lodning af tynde varmevekslerplader og varmeveksler med loddede plader, fremstilt ifølge fremgansmåden
DE60231706T DE60231706D1 (de) 2001-05-03 2002-05-03 Verfahren zum hartlöten von dünnen wärmeaustauschplatten und gemäss diesem verfahren hergestellter wärmetauscher mit hartgelöteten platten
PT02728297T PT1383624E (pt) 2001-05-03 2002-05-03 Método de soldar placas finas de troca de calor e permutador de calor de placas soldadas produzido de acordo com o método
AU2002258329A AU2002258329B2 (en) 2001-05-03 2002-05-03 Method of brazing thin heat exchanging plates and brazed plate heat exchanger produced according to the method
JP2002587149A JP4805529B2 (ja) 2001-05-03 2002-05-03 薄い伝熱板どうしの蝋付け方法およびこの方法で製造された蝋付け型のプレート熱交換器
EP02728297.9A EP1383624B2 (en) 2001-05-03 2002-05-03 Method of brazing thin heat exchanging plates and brazed plate heat exchanger produced according to the method
PL366607A PL202715B1 (pl) 2001-05-03 2002-05-03 Sposób lutowania cienkich wymieniających ciepło płyt i lutowany płytowy wymiennik ciepła
CNB028093194A CN100496842C (zh) 2001-05-03 2002-05-03 钎焊热交换薄板的方法和按此法制得的焊接薄板热交换器
KR1020107011787A KR20100076051A (ko) 2001-05-03 2002-05-03 얇은 열교환판의 접합 방법과 이에 따라 제조된 브래이징식 판형 열교환기
US10/476,561 US7685716B2 (en) 2001-05-03 2002-05-03 Method of brazing thin heat exchanging plates and brazed plate heat exchanger produced according to the method
PCT/SE2002/000886 WO2002090032A1 (en) 2001-05-03 2002-05-03 Method of brazing thin heat exchanging plates and brazed plate heat exchanger produced according to the method
ES02728297.9T ES2322943T5 (es) 2001-05-03 2002-05-03 Método de soldadura de placas termocambiadoras finas e intercambiador de calor de placas soldadas producido de acuerdo con el método
SI200230807T SI1383624T1 (sl) 2001-05-03 2002-05-03 Postopek trdega spajkanja plošč za izmenjavo toplote in trdo spajkani izmenjevalec toplote izdelan po tem postopku
KR1020037014279A KR100977953B1 (ko) 2001-05-03 2002-05-03 얇은 열교환판의 접합 방법과 이에 따라 제조된 브래이징식 판형 열교환기
CA2445665A CA2445665C (en) 2001-05-03 2002-05-03 Method of brazing thin heat exchanging plates and brazed plate heat exchanger produced according to the method
AT02728297T ATE426477T2 (de) 2001-05-03 2002-05-03 Verfahren zum hartlíten von dunnen warmeaustauschplatten und gemass diesem verfahren hergestellter warmetauscher mit hartgelíteten platten
JP2009082108A JP5480521B2 (ja) 2001-05-03 2009-03-30 薄い伝熱板どうしの蝋付け方法およびこの方法で製造された蝋付け型のプレート熱交換器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0101573A SE519062C2 (sv) 2001-05-03 2001-05-03 Sätt att sammanlöda tunna värmeväxlarplattor samt lödd plattvärmeväxlare framställd enligt sättet

Publications (3)

Publication Number Publication Date
SE0101573D0 SE0101573D0 (sv) 2001-05-03
SE0101573L SE0101573L (sv) 2002-11-04
SE519062C2 true SE519062C2 (sv) 2003-01-07

Family

ID=20283987

Family Applications (1)

Application Number Title Priority Date Filing Date
SE0101573A SE519062C2 (sv) 2001-05-03 2001-05-03 Sätt att sammanlöda tunna värmeväxlarplattor samt lödd plattvärmeväxlare framställd enligt sättet

Country Status (16)

Country Link
US (1) US7685716B2 (da)
EP (1) EP1383624B2 (da)
JP (2) JP4805529B2 (da)
KR (2) KR100977953B1 (da)
CN (1) CN100496842C (da)
AT (1) ATE426477T2 (da)
AU (1) AU2002258329B2 (da)
CA (1) CA2445665C (da)
DE (1) DE60231706D1 (da)
DK (1) DK1383624T4 (da)
ES (1) ES2322943T5 (da)
PL (1) PL202715B1 (da)
PT (1) PT1383624E (da)
SE (1) SE519062C2 (da)
SI (1) SI1383624T1 (da)
WO (1) WO2002090032A1 (da)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE524928C2 (sv) * 2001-06-05 2004-10-26 Alfa Laval Corp Ab Järnbaserat lodmaterial för sammanfogning av element genom lödning samt lödd produkt framställd härmed
SE527509C2 (sv) * 2003-10-17 2006-03-28 Alfa Laval Corp Ab Lödd plattvärmeväxlare med plattor av i huvudsak rostfritt stål och förfarande för tillverkning av en sådan plattvärmeväxlare
SE531092C2 (sv) * 2005-05-26 2008-12-16 Alfa Laval Corp Ab Metod för att sammanlöda två ytor samt en anordning innefattande två sammanlödda ytor
PL1888294T5 (pl) * 2005-05-26 2017-10-31 Alfa Laval Corp Ab Sposób lutowania twardego wyrobów ze stali nierdzewnej
CN101195186B (zh) * 2006-12-05 2010-06-30 王强 一种换热器铝管钎焊火焰分流网以及利用该分流网进行铝管接头钎焊的方法
US8169468B2 (en) 2008-04-26 2012-05-01 Intuitive Surgical Operations, Inc. Augmented stereoscopic visualization for a surgical robot
KR101585291B1 (ko) 2009-10-06 2016-01-13 루이지애나 테크 유니버시티 리서치 파운데이션 매설된 대상물을 검출하기 위한 방법 및 장치
CN102126090B (zh) * 2011-04-08 2012-11-07 山东大学 外覆盖件硌伤焊锡补件方法
DE102011112512B4 (de) * 2011-09-07 2013-06-06 Umicore Ag & Co. Kg Verfahren zur Herstellung von Plattenwärmetauschern
EP2574420B1 (en) 2011-09-29 2014-10-22 Alfa Laval Corporate AB Iron-based brazing composition and method of joining heat transfer plates
US8960525B2 (en) 2013-01-31 2015-02-24 General Electric Company Brazing process and plate assembly
EP2853333B1 (en) 2013-09-26 2019-08-21 Alfa Laval Corporate AB Method of joining metal parts using a melting depressant layer
EP2853332A1 (en) 2013-09-26 2015-04-01 Alfa Laval Corporate AB A novel brazing concept
KR102277174B1 (ko) * 2013-10-29 2021-07-14 스웹 인터네셔널 에이비이 스크린 프린티드 브레이징재를 이용한 판형 열교환기 브레이징 방법 및 그 방법으로 제조된 판형 열교환기
WO2016057856A1 (en) 2014-10-10 2016-04-14 Modine Manufacturing Company Brazed heat exchanger and production method
PL3527320T3 (pl) 2016-03-31 2021-07-26 Alfa Laval Corporate Ab Metoda łączenia płyt wymiennika ciepła w płytowym wymienniku ciepła
DE102016124206A1 (de) 2016-12-13 2018-06-14 Michael Rehberg Plattenwärmetauscher-Herstellungsverfahren und Plattenwärmetauscher
DE102017106393B4 (de) 2017-03-24 2022-01-20 Michael Rehberg Plattenwärmetauscher-Herstellungsverfahren
SE541917C2 (en) * 2018-01-16 2020-01-07 Swep Int Ab Method for producing a brazed plate heat exchanger

Family Cites Families (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2185946A5 (da) * 1972-05-23 1974-01-04 Chausson Usines Sa
FR2303622A1 (fr) * 1975-03-10 1976-10-08 Microturbo Sa Procede de fabrication d'une unite du type echangeur de chaleur
JPS5461015A (en) * 1977-10-25 1979-05-17 Kobe Steel Ltd Manufacture of aluminum-soldered fin heat exchanger
US4444587A (en) * 1983-02-03 1984-04-24 Huntington Alloys, Inc. Brazing alloy
US4606495A (en) 1983-12-22 1986-08-19 United Technologies Corporation Uniform braze application process
JPH01254377A (ja) * 1988-04-05 1989-10-11 Furukawa Alum Co Ltd 熱交換器の製造方法
CA2002319C (en) * 1988-11-07 1995-04-04 Yasuaki Matsuda Positive-temperature-coefficient heating device and process for fabricating the same
JPH02207995A (ja) * 1989-02-09 1990-08-17 Nippon Kinzoku Co Ltd 金属触媒担体の接合用ろう材及び金属触媒担体の製造方法
US5099912A (en) * 1990-07-30 1992-03-31 Calsonic Corporation Housingless oil cooler
JPH089097B2 (ja) * 1990-10-16 1996-01-31 住友精密工業株式会社 積層体ロウ付け方法
JP3289279B2 (ja) * 1991-02-01 2002-06-04 株式会社日本自動車部品総合研究所 触媒担体
US5263641A (en) * 1992-11-04 1993-11-23 Coating Applications, Inc. Method of bonding hard metal objects with braze slurry
JPH06210186A (ja) * 1993-01-20 1994-08-02 Nippon Steel Corp 金属製排気ガス浄化用触媒担体の接合方法
EP0668480A4 (en) * 1993-09-16 1996-10-30 Nippon Denso Co ALUMINUM HEAT EXCHANGER.
JPH07173607A (ja) * 1993-12-17 1995-07-11 Nkk Corp ろう付け性に優れた表面処理鋼板
JPH07180039A (ja) * 1993-12-24 1995-07-18 Nkk Corp 表面処理鋼板の急速加熱接合方法
JPH0881290A (ja) * 1994-09-09 1996-03-26 Hitachi Chem Co Ltd 銅合金被覆炭素材料及びその製造法並びに銅合金被覆炭素材料を用いたプラズマ対向材
JPH08136183A (ja) * 1994-11-04 1996-05-31 Zexel Corp 積層型熱交換器
IL118089A (en) * 1995-05-22 2001-06-14 Allied Signal Inc Nickel-chrome solder alloys
IT1276990B1 (it) * 1995-10-24 1997-11-03 Tetra Laval Holdings & Finance Scambiatore di calore a piastre
JP3299148B2 (ja) * 1997-09-16 2002-07-08 株式会社ゼクセルヴァレオクライメートコントロール 熱交換器用チューブとその製造方法
JP3147065B2 (ja) * 1997-12-10 2001-03-19 ダイキン工業株式会社 プレート式熱交換器
JPH11309564A (ja) * 1998-04-28 1999-11-09 Denso Corp 熱交換器
JP3858484B2 (ja) † 1998-11-24 2006-12-13 松下電器産業株式会社 積層式熱交換器
JP2000121286A (ja) * 1998-10-12 2000-04-28 Mitsubishi Motors Corp 積層型熱交換器の製造方法
SE513784C2 (sv) * 1999-03-09 2000-11-06 Alfa Laval Ab Permanent sammanfogad plattvärmeväxlare
JP2000281460A (ja) * 1999-03-31 2000-10-10 Tokuyama Corp 金属粉末ろう材および窒化アルミニウム部材と金属部材との接合方法
SE514714C2 (sv) * 1999-08-27 2001-04-09 Alfa Laval Ab Lödd plattvärmeväxlare med dubbelväggiga plattor utan inre anliggning mittför lödförbindningarna
JP2002028775A (ja) * 2000-05-10 2002-01-29 Denso Corp 耐腐食性熱交換器の製造方法
FR2816046B1 (fr) * 2000-10-27 2003-01-24 Air Liquide Procede de fabrication d'un echangeur de chaleur a plaques brasees, et echangeur ainsi produit

Also Published As

Publication number Publication date
PL366607A1 (en) 2005-02-07
DE60231706D1 (de) 2009-05-07
US7685716B2 (en) 2010-03-30
DK1383624T4 (da) 2016-12-05
AU2002258329B2 (en) 2007-01-04
JP2004529775A (ja) 2004-09-30
KR20100076051A (ko) 2010-07-05
EP1383624B2 (en) 2016-08-10
ES2322943T5 (es) 2017-02-17
CA2445665A1 (en) 2002-11-14
SE0101573L (sv) 2002-11-04
JP2009148833A (ja) 2009-07-09
CA2445665C (en) 2011-11-08
KR20030093339A (ko) 2003-12-06
SI1383624T1 (sl) 2009-06-30
CN1507379A (zh) 2004-06-23
PT1383624E (pt) 2009-05-14
EP1383624B1 (en) 2009-03-25
SE0101573D0 (sv) 2001-05-03
ES2322943T3 (es) 2009-07-02
US20040181941A1 (en) 2004-09-23
EP1383624A1 (en) 2004-01-28
JP4805529B2 (ja) 2011-11-02
CN100496842C (zh) 2009-06-10
PL202715B1 (pl) 2009-07-31
DK1383624T3 (da) 2009-06-22
WO2002090032A1 (en) 2002-11-14
KR100977953B1 (ko) 2010-08-24
ATE426477T2 (de) 2009-04-15
JP5480521B2 (ja) 2014-04-23

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