US20020179297A1 - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
US20020179297A1
US20020179297A1 US10/149,191 US14919102A US2002179297A1 US 20020179297 A1 US20020179297 A1 US 20020179297A1 US 14919102 A US14919102 A US 14919102A US 2002179297 A1 US2002179297 A1 US 2002179297A1
Authority
US
United States
Prior art keywords
tubes
heat exchanger
brazing material
recessed portions
outer surfaces
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
US10/149,191
Other languages
English (en)
Inventor
Soichi Kato
Shoji Akiyama
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.)
ZEXAEL VALEO CLIMATE CONTROL Corp
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to ZEXAEL VALEO CLIMATE CONTROL CORPORATION reassignment ZEXAEL VALEO CLIMATE CONTROL CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AKIYAMA, SHOJI, KATO, SOICHI
Publication of US20020179297A1 publication Critical patent/US20020179297A1/en
Priority to US10/788,474 priority Critical patent/US6988539B2/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • 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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding

Definitions

  • the present invention relates to a heat exchanger which is provided with tubes for flowing a medium and exchanges heat of the medium with heat conducted to the tubes.
  • a heat exchanger such as a condenser, an evaporator, a radiator, a heater core or the like mounted on automobiles is provided with tubes for flowing a medium, fins fitted to the tubes and tanks which are connected to the tube ends and configured to perform the heat exchange of the medium with heat conducted to the tubes and the fins.
  • this type of heat exchanger is produced by assembling the tubes, fins and tanks which are made of aluminum or an aluminum alloy and heating the assembly in a furnace to be brazed into one body. A brazing material and flux necessary for the brazing are previously applied to necessary portions of the respective members before heating.
  • tubes for the heat exchanger those produced by shaping a plate-shaped material are known. And, these tubes are provided with beads which are shaped by bending a material, and the beads serve to improve a heat-exchange property and a pressure resistance of the tubes.
  • this heat exchanger has a sacrifice layer disposed on the outer surfaces of the tubes, so that the corrosion resistance of the tubes can be improved.
  • the sacrifice layer which is formed of an Al—Zn based alloy is disposed on the core material of the tubes made of an Al—Mn based alloy, and electric potential of the tube core material becomes high with respect to the sacrifice layer.
  • the corrosion resistance of the tubes is improved by a sacrificial anode effect.
  • the present invention is a heat exchanger which is provided with tubes for flowing a medium and tanks to which ends of the tubes are connected, performs heat exchange of the medium by heat conducted to the tubes, has the tubes and the tanks assembled to form a heat exchanger core, and has the heat exchanger core brazed into one body, wherein the tubes are formed by shaping a plate-shaped material, have beads which are formed by bending the material, and have a sacrifice layer disposed on the outer surfaces of the tubes; the heat exchanger core, excluding at least the tubes, is provided with a brazing material for filling recessed portions on the outer surfaces of the tubes which are formed when the beads are formed; and the recessed portions on the outer surfaces of the tubes are filled with the brazing material which melts from the heat exchanger core at the time of integral brazing.
  • the corrosion resistance of the tubes is efficiently secured.
  • the recessed portions on the outer surfaces of the tubes tend to gather dust and water and become a cause of promoting corrosion of the tubes.
  • the present invention provides the sacrifice layer on the outer surfaces of the tubes and recessed portions are filled with the brazing material, which melts from the heat exchanger core, into the recessed portions.
  • the corrosion resistance of the tubes is improved securely.
  • the brazing material for filling the recessed portions is provided on the tubes, the production cost becomes very high. Therefore, the brazing material for filling the recessed portions is disposed on the heat exchanger core other than the tubes to save the cost.
  • the brazing material to be used may be in a form such as clad on the tanks, disposed on the fins, a replaced brazing material disposed on the heat exchanger core, or the like.
  • FIG. 1 is a front view showing a heat exchanger according to an embodiment of the present invention
  • FIG. 2 is a perspective view showing tubes, fins and a tank according to the embodiment of the invention.
  • FIG. 3 is a sectional diagram showing a tube according to the embodiment of the invention.
  • FIG. 4 is a sectional diagram showing a tube according to an embodiment of the invention.
  • FIG. 5 is a top view showing a tube and a tank according to the embodiment of the invention.
  • FIG. 6 is a side view showing a tube and fins according to an embodiment of the invention.
  • a heat exchanger of this embodiment is a condenser of a refrigerating cycle for an in-car air conditioner mounted on automobiles, and has a heat exchanger core 1 configured by alternately stacking a plurality of tubes 2 and a plurality of fins 3 and connecting both ends of the tubes 2 to a pair of tanks 4 .
  • the tanks 4 of this embodiment are cylindrical members which are provided with an inlet joint 401 and an outlet joint 402 for connecting an external pipe and holes 403 into which the ends of the tubes 2 are inserted for connection, and have their inside portioned at a prescribed width.
  • a medium is taken-in through the inlet joint 401 , passing through the tubes 2 while heat exchanging with heat conducted to the tubes 2 and the fins 3 and discharged through the outlet joint 402 .
  • side plates 5 which are reinforcing members, are respectively disposed on the top and bottom of a layer of the tubes 2 and the fins 3 . Both ends of the side plates 5 are supported by the tanks 4 .
  • the tubes 2 , the fins 3 , the tanks 4 and the side plates 5 are assembled by a jig, and heated in a furnace to be brazed into one body.
  • a brazing material and flux are previously disposed at necessary portions of these members.
  • the tubes 2 of this embodiment have a flat shape formed by rolling a plate-shaped material 200 made of an aluminum alloy so to have a joined portion 201 which is formed by connecting the ends in a breadth direction of the material 200 and a plurality of beads 202 which are formed by bending the material 200 inwardly, and the joined portion 201 , the tops of the beads 202 and the inner opposed portions are brazed. And, a sacrifice layer 210 is disposed on the surface of the material 200 which will become the outer surfaces of the tubes 2 .
  • the beads 202 improve the heat-exchange property and pressure resistance of the tubes 2
  • the sacrifice layer 210 improves the corrosion resistance of the tubes 2 .
  • the beads 202 may be formed to braze the opposed tops mutually as shown in FIG. 4.
  • a brazing material R fills the recessed portions 203 on the outer surfaces of the tubes 2 formed according to the beads 202 .
  • the brazing material R to fill the recessed portions 203 melts from the fins 3 and the tanks 4 at the time of brazing and enters into the recessed portions 203 as shown in FIG. 5 and FIG. 6.
  • the brazing material is clad to or disposed on the fins 3 , and the tubes 2 have the tops of the fins 3 brazed by brazing and the brazing material R melting from the fins 3 enters into the recessed portions 203 .
  • the replaced brazing material may be disposed between the tubes 2 and the fins 3 or between the tubes 2 and the tanks 4 .
  • the entry of dust and water into the recessed portions 203 can be prevented by filling the recessed portions 203 with the brazing material R, and the corrosion resistance of the tubes 2 can be improved.
  • the tubes 2 can be reinforced by the brazing material R, and the pressure resistance and strength of the tubes 2 can also be improved.
  • the brazing material R may partly fill around the tops of the fins 3 , around the holes 403 of the tanks 4 , or the like.
  • the replaced brazing material may be disposed as the brazing material on the outer surface of the tubes 2 to fill the recessed portions 203 with the brazing material. Specifically, it may be configured to fill the recessed portions 203 with the replaced brazing material disposed on the tubes 2 in additon to the brazing material melting from the fins 3 and the tanks 4 .
  • the tubes are formed by shaping the plate-shaped material and have the beads which are formed by bending the material, the sacrifice layer is disposed on the outer surfaces, and the brazing material which melts from the fins and the tanks at the time of brazing fills the recessed portions on the outer surfaces of the tubes which are formed according to the beads.
  • the corrosion resistance of the tubes can be secured efficiently.
  • the recessed portions on the outer surface of the tubes tend to gather dust and water and become a cause of promoting the corrosion of the tubes.
  • the present invention disposes the sacrifice layer on the outer surfaces of the tubes and the brazing material, which melts from the tanks and the fins, enters into and fills the recessed portions, so that the corrosion resistance of the tubes can be improved without fail.
  • the tubes of this embodiment are formed by shaping the plate-shaped material and have the beads which are formed by bending the material, and the sacrifice layer is disposed on the outer surfaces of the tubes.
  • the heat exchanger is configured by disposing the replaced brazing material on the tubes at the time of brazing and the brazing material of the replaced brazing material fills the recessed portions on the outer surfaces of the tubes which are formed according to the beads. This configuration secures the corrosion resistance of the tubes efficiently.
  • the corrosion resistance of the tubes can be improved without fail by filling the recessed portions with the brazing material of the replaced brazing material disposed on the tubes.
  • the tubes 2 and the plurality of fins 3 are alternately stacked, and both ends of the tubes are respectively connected to the pair of tanks 4 to configure the heat exchanger core 1 .
  • the present invention is not limited to it and can also be applied to, for example, a heat exchanger core not using fins and a heat exchanger core of another embodiment.
  • the present invention is a heat exchanger which can have the corrosion resistance of the tubes secured efficiently and can be suitably used as a heat exchanger for a condenser, an evaporator, a radiator, a heater core and the like mounted on automobiles.

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)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
US10/149,191 2000-01-07 2000-12-27 Heat exchanger Abandoned US20020179297A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/788,474 US6988539B2 (en) 2000-01-07 2004-03-01 Heat exchanger

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000001854A JP3998880B2 (ja) 2000-01-07 2000-01-07 熱交換器
JP2000-1854 2000-07-01

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US10/788,474 Continuation-In-Part US6988539B2 (en) 2000-01-07 2004-03-01 Heat exchanger

Publications (1)

Publication Number Publication Date
US20020179297A1 true US20020179297A1 (en) 2002-12-05

Family

ID=18531035

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/149,191 Abandoned US20020179297A1 (en) 2000-01-07 2000-12-27 Heat exchanger

Country Status (4)

Country Link
US (1) US20020179297A1 (ja)
EP (1) EP1306156A4 (ja)
JP (1) JP3998880B2 (ja)
WO (1) WO2001049443A1 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100024508A1 (en) * 2007-02-01 2010-02-04 Frank Opferkuch Tubes and method and apparatus for producing tubes
CN105004209A (zh) * 2014-04-25 2015-10-28 泰安鼎鑫冷却器有限公司 一种t型加强筋高强度散热管

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6530514B2 (en) * 2001-06-28 2003-03-11 Outokumpu Oyj Method of manufacturing heat transfer tubes
US8191258B2 (en) 2006-01-19 2012-06-05 Modine Manufacturing Company Flat tube, flat tube heat exchanger, and method of manufacturing same
DE102006016711B4 (de) * 2006-04-08 2016-11-03 Modine Manufacturing Co. Flachrohr für Wärmetauscher
US8683690B2 (en) 2006-01-19 2014-04-01 Modine Manufacturing Company Flat tube, flat tube heat exchanger, and method of manufacturing same
US8281489B2 (en) 2006-01-19 2012-10-09 Modine Manufacturing Company Flat tube, flat tube heat exchanger, and method of manufacturing same
US8434227B2 (en) 2006-01-19 2013-05-07 Modine Manufacturing Company Method of forming heat exchanger tubes
US8438728B2 (en) 2006-01-19 2013-05-14 Modine Manufacturing Company Flat tube, flat tube heat exchanger, and method of manufacturing same
WO2007084987A2 (en) 2006-01-19 2007-07-26 Modine Manufacturing Company Flat tube, flat tube heat exchanger, and method of manufacturing same
US8091621B2 (en) 2006-01-19 2012-01-10 Modine Manufacturing Company Flat tube, flat tube heat exchanger, and method of manufacturing same
US7921559B2 (en) 2006-01-19 2011-04-12 Modine Manufacturing Company Flat tube, flat tube heat exchanger, and method of manufacturing same
DE102006002789A1 (de) * 2006-01-20 2007-07-26 Modine Manufacturing Co., Racine Flachrohr, Wärmetauscher und Herstellungsverfahren für Wärmetauscher
DE102006035210B4 (de) * 2006-07-29 2016-10-06 Modine Manufacturing Co. Flaches Wärmetauscherrohr und Herstellungsverfahren
DE102010023384B4 (de) 2010-06-10 2014-08-28 Modine Manufacturing Co. Herstellungsverfahren, insbesondere für Rohre und Abreißvorrichtung
CN105021078A (zh) * 2014-05-02 2015-11-04 泰安鼎鑫冷却器有限公司 一种双向折叠六重管壁加强型散热管
JP6632868B2 (ja) * 2015-11-05 2020-01-22 日軽熱交株式会社 アルミニウム製熱交換器
EP3399267A1 (en) * 2017-05-02 2018-11-07 Valeo Systemes Thermiques A flat tube for a heat exchanger and a heat exchanger
WO2018202630A1 (en) * 2017-05-02 2018-11-08 Valeo Systemes Thermiques A flat tube for a heat exchanger and a heat exchanger
WO2020213023A1 (ja) * 2019-04-15 2020-10-22 三菱電機株式会社 熱交換器及び空気調和機

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02115689U (ja) * 1989-03-06 1990-09-17
JPH04143598A (ja) * 1990-10-04 1992-05-18 Nippondenso Co Ltd 熱交換器
JP3093847B2 (ja) * 1991-12-18 2000-10-03 昭和アルミニウム株式会社 熱交換器用チューブの製造方法
GB2303089B (en) * 1995-07-13 1998-04-15 T & N Technology Ltd Forming heat exchangers
JP3799671B2 (ja) * 1996-08-07 2006-07-19 株式会社デンソー 熱交換器、熱交換器用チューブ及び熱交換器の製造方法
FR2765817B1 (fr) * 1997-07-11 1999-09-10 Valeo Thermique Moteur Sa Tube plie pour un echangeur de chaleur, notamment de vehicule automobile
JP2000227293A (ja) * 1999-02-05 2000-08-15 Zexel Corp 熱交換器及びその製造方法
JP2000271735A (ja) * 1999-03-30 2000-10-03 Bosch Automotive Systems Corp 熱交換器のろう付け用フラックス混合物の塗布方法及び熱交換器

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100024508A1 (en) * 2007-02-01 2010-02-04 Frank Opferkuch Tubes and method and apparatus for producing tubes
US8561451B2 (en) 2007-02-01 2013-10-22 Modine Manufacturing Company Tubes and method and apparatus for producing tubes
CN105004209A (zh) * 2014-04-25 2015-10-28 泰安鼎鑫冷却器有限公司 一种t型加强筋高强度散热管

Also Published As

Publication number Publication date
EP1306156A4 (en) 2009-11-11
EP1306156A1 (en) 2003-05-02
JP3998880B2 (ja) 2007-10-31
WO2001049443A1 (fr) 2001-07-12
JP2001194080A (ja) 2001-07-17

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ZEXAEL VALEO CLIMATE CONTROL CORPORATION, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KATO, SOICHI;AKIYAMA, SHOJI;REEL/FRAME:013186/0718

Effective date: 20020425

STCB Information on status: application discontinuation

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