EP0863376A2 - Wärmetauscher und Verfahren zu dessen Herstellung - Google Patents

Wärmetauscher und Verfahren zu dessen Herstellung Download PDF

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Publication number
EP0863376A2
EP0863376A2 EP98301610A EP98301610A EP0863376A2 EP 0863376 A2 EP0863376 A2 EP 0863376A2 EP 98301610 A EP98301610 A EP 98301610A EP 98301610 A EP98301610 A EP 98301610A EP 0863376 A2 EP0863376 A2 EP 0863376A2
Authority
EP
European Patent Office
Prior art keywords
header pipe
bracket
joint block
heat exchanger
header
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Withdrawn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
EP98301610A
Other languages
English (en)
French (fr)
Other versions
EP0863376A3 (de
Inventor
Akira Sakano
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.)
Sanden Corp
Original Assignee
Sanden Corp
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 Sanden Corp filed Critical Sanden Corp
Publication of EP0863376A2 publication Critical patent/EP0863376A2/de
Publication of EP0863376A3 publication Critical patent/EP0863376A3/de
Withdrawn legal-status Critical Current

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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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0243—Header boxes having a circular cross-section
    • 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
    • F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core
    • F28F9/002—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core with fastening means for other structures
    • 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
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • 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
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • F28F9/0251—Massive connectors, e.g. blocks; Plate-like connectors

Definitions

  • the present invention relates to a heat exchanger suitable for use in automobiles and a method for manufacturing the heat exchanger.
  • a heat exchanger typically comprises a pair of header pipes, a plurality of heat transfer tubes interconnecting the pair of header pipes, and fins disposed between the heat transfer tubes.
  • Such a heat exchanger is usually attached to another member (for example, a member disposed in a engine room or a vehicle frame) via brackets.
  • the brackets are attached to, for example, a pair of header pipes 51 and 52, as shown in Figs. 9 and 10.
  • Header pipe 51 (or 52) is usually formed as a circular cross section.
  • Bracket 53 has a curved portion (R portion) 54 formed along the outer surface of header pipe 51 (or 52), and R portion 54 is brazed to the outer surface of header pipe 51 (or 52).
  • bracket 53 When bracket 53 is attached to header pipe 51 (or 52), generally, R portion 54 is temporarily fixed to the outer surface of header pipe 51 (or 52) by, for example, MIG spot welding, and thereafter, bracket 53 is brazed to header pipe 51 (or 52). In the brazing process, because the outer surface of header pipe 51 (or 52) is curved, bracket 53 is likely to rotate or move along the outer surface. Therefore, it is often difficult to set or fix bracket 53 at a proper position relative to header pipe 51 (or 52) and to braze bracket 53 at the proper position. Moreover, an undesired gap 55 may be formed between R portion 54 of bracket 53 and the outer surface of header pipe 51 (or 52), and this gap 55 may cause a defect of brazing.
  • header pipe 56 is formed by curling a longitudinal flat plate to form a pipe portion 57.
  • Header pipe 56 has connecting portions 58 and 59 formed by folding the lateral end portions of the longitudinal flat plate and bringing the surfaces of the lateral end portions into contact with each other so that the connecting portions 58 and 59 project from the outer surface of pipe portion 57.
  • Bracket 60 is connected to connecting portions 58 and 59.
  • Bracket 60 has a holding portion 61, and bracket 60 is fixed to header pipe 56 at a predetermined position by fastening holding portion 61 onto connecting portions 58 with bolts 62.
  • bracket 60 is connected to connecting portions 58 and 59 projecting from the outer surface of pipe portion 57, the working for positioning and connecting of bracket 60 may be improved. Further, the strength of header pipe 56 may be increased by the contact structure of connecting portions 58 and 59. However, because bracket 60 is attached at an outer side of connecting portions 58 and 59 in the width direction of a heat exchanger, the total width of the heat exchanger including bracket 60 becomes greater. Further, when a bracket is required to be attached on the outer surface of pipe portion 57, the aforementioned problem, that is, the rotation of the bracket at its positioning or fixing, cannot be solved.
  • the heat exchanger includes at least a header pipe.
  • the header pipe comprises a header pipe body formed as a tube and two connecting portions projecting outwardly from the header pipe body and connected to each other at a plane contact condition.
  • a joint block for piping or a bracket is connected to the header pipe at a condition in which the joint block or bracket is brought into contact with both the header pipe body and one or both of the two connecting portions.
  • the joint block or bracket may have a holding portion nipping two connecting portions from both sides.
  • a heat medium inlet portion and/or outlet portion may be formed on the header pipe integrally with the header pipe.
  • the heat exchanger typically comprises a pair of header pipes, a plurality of heat transfer tubes interconnecting the pair of header pipes, and a plurality of fins disposed between the respective adjacent heat transfer tubes.
  • a method for manufacturing a heat exchanger according to the present invention is characterized in that both lateral end portions of a longitudinal flat plate for forming a header pipe are folded, the longitudinal flat plate is bent in its transverse direction to form a tubular header pipe body by curling a central portion of the longitudinal flat plate and to form an engaging portion projecting from the tubular header pipe body by bringing surfaces of the folded lateral end portions into contact with each other, and a joint block for piping or a bracket is positioned relative to a formed header pipe by bringing the joint block or bracket into contact with both an outer surface of the header pipe body and a side surface of the engaging portion.
  • the joint block or bracket may have a holding portion for holding the engaging portion from both sides and the joint block or bracket may be temporarily fixed to the header pipe by caulking the holding portion to the engaging portion.
  • the joint block or bracket may be temporarily fixed to the header pipe by fastening the joint block or bracket to the engaging portion with a bolt.
  • the joint block or bracket may be fitted onto at least an end of the tubular header pipe body of the header pipe.
  • the joint block or bracket After the positioning of the joint block or bracket relative to the header pipe, or, after temporarily fixing the joint block or bracket to the header pipe after the positioning, the joint block or bracket may be brazed to the header pipe.
  • the joint block or bracket is brought into contact with both the outer surface of the header pipe body and one or both of two connecting portion (that is, the side surface of the engaging portion formed by the folded lateral end portions). Therefore, since the joint block or bracket is regulated in position by two different portions of the header pipe, the joint block or bracket may be positioned at a proper position easily and precisely.
  • the outer surface of the header pipe body is formed as a curved surface
  • the joint block or bracket is brought into contact with the side surface of the engaging portion projecting from the header pipe body as well as with the outer surface of the header pipe body, the rotation of the joint block or bracket in the circumferential direction of the outer surface of the header pipe body may be prevented by the contact with the engaging portion.
  • both of proper positioning and good fixing of the joint block or bracket relative to the header pipe may be achieved.
  • the joint block or bracket may be attached to the header pipe more closely to the header pipe body as compared the structure shown in Fig. 11, the total size of the heat exchanger in the width direction may be reduced.
  • the folded lateral end portions are brought into contact with each other to form the engaging portion (two connecting portions) at a plane contact condition, the strength of the formed header pipe may be greatly increased.
  • the joint block or bracket may be temporarily fixed to the header pipe more strongly, thereby achieving a desired brazing.
  • joint block or bracket is fitted onto at least an end of the tubular header pipe body of the header pipe, a precise positioning except positioning in the rotational direction may be achieved by the fitting structure, and at the same time, the rotation of the positioned joint block or bracket may be surely prevented by the contact with the engaging portion.
  • Fig. 1 is a perspective view of a heat exchanger according to a first embodiment of the present invention.
  • Figs. 2A and 2B are perspective views of a longitudinal flat plate and formed header pipe therefrom, showing a process for forming the header pipe.
  • Fig. 3 is a cross-sectional view of a header pipe portion of the heat exchanger depicted in Fig. 1.
  • Figs. 4A and 4B are perspective views of an upper end portion of the header pipe of the heat exchanger depicted in Fig. 1, showing the process for temporarily fixing a joint block to the header pipe.
  • Fig. 5 is a partial perspective view of a heat exchanger according to a second embodiment of the present invention.
  • Fig. 6 is a partial perspective view of a header pipe of a heat exchanger according to a third embodiment of the present invention.
  • Fig. 7 is a partial side view of the header pipe depicted in Fig. 6 and a joint block attached thereto.
  • Fig. 8 is a cross-sectional view of the header pipe depicted in Fig. 7 as viewed along the line VIII-VIII of Fig. 7.
  • Fig. 9 is a partial elevational view of a header pipe portion of a conventional heat exchanger.
  • Fig. 10 is a cross-sectional view of the header pipe portion depicted in Fig. 9 as viewed along the line X-X of Fig. 9.
  • Fig. 11 is a perspective view of a header pipe portion of a heat exchanger disclosed in Japanese Utility Model Laid-Open HEI 3-64375.
  • Heat exchanger 1 includes a pair of header pipes 2 and 3 disposed parallel to each other.
  • Corrugated fins 5 are interposed between the respective adjacent heat transfer tubes 4.
  • Header pipes 2 and 3 are manufactured as follows.
  • a plurality of holes 9 for inserting tubes 4 thereinto are formed on a longitudinal flat plate 8. Both lateral end portions 11 and 12 are folded to form connecting portions 13 and 14. Forming of holes 9 and folding of lateral end portions 11 and 12 may be performed by a single process such as pressing.
  • longitudinal flat plate 8 is bent by curling it at its central portion in the transverse direction to form a header pipe body 6 having a circular cross section and to bring the folded lateral end portions 11 and 12 into contact with each other at a plane contact condition.
  • the folded lateral end portions 11 and 12 forms connecting portions 13 and 14 which project outwardly from the outer surface of header pipe body 6, and the contact connecting portions 13 and 14 form an engaging portion 7 for positioning a joint block or a bracket in the manufacturing process.
  • Bracket 15 and joint block 16 are connected to header pipe 2 and 3 thus formed.
  • bracket 15 is disposed at a position on header pipe 2 (or 3) so that bracket 15 comes into contact with both the outer surface of header pipe 2 (or 3) and the side surface of engaging portion 7 (in this embodiment, the side surface of connecting portion 14). Because bracket 15 is regulated in position by different two portions, that is, the outer surface of header pipe 2 (or 3) and the side surface of engaging portion 7, bracket 15 may be positioned at a proper position easily and precisely as well as bracket 15 may be prevented from being rotated by the contact with the side surface of engaging portion 7. In such a condition, bracket 15 is temporarily fixed to header pipe 2 (or 3), for example, by MIG spot welding.
  • Joint block 16 is disposed at an end portion of header pipe 2 (or 3).
  • joint block 16 has a fitting hole 16a, and joint block 16 is fitted onto the end portion of header pipe 2 (or 3).
  • Fitting hole 16a may be formed either in correspondence with only tubular header pipe body 6, or in correspondence with both header pipe body 6 and engaging portion 7.
  • Joint block 16 may be positioned on the end of header pipe 2 (or 3) precisely by the fitting structure, except in the rotational direction. The movement or rotation of joint block 16 in the rotational direction may be surely prevented by the contact with engaging portion 7. Therefore, joint block 16 may be precisely positioned in all directions.
  • a portion 16 b of joint block 16 is caulked onto engaging portion 7 to temporarily fix joint block 16 to header pipe 2 (or 3), as depicted in Fig. 4B.
  • brackets 15 and joint blocks 16 are brazed integrally in a furnace. Since the respective brackets 15 and joint blocks 16 are precisely positioned and fixed at the respective proper positions, a good brazing property may be achieved and heat exchanger 1 having an excellent performance may be obtained.
  • brackets 15 can be disposed at the front side (or the rear side) of heat exchanger 1 while the above-described precise positioning is maintained, the total size of heat exchanger 1 including brackets 15 in the width direction of heat exchanger 1 may be greatly reduced. Moreover, by the presence of connecting portions 13 and 14, the strength of header pipes 2 and 3 greatly increases.
  • Fig. 5 depicts an upper end portion of a header pipe of a heat exchanger according to a second embodiment of the present invention.
  • Header pipe 21 has a header pipe body 22 and connecting portions 23 and 24 projecting from the outer surface of header pipe body 22, similarly to that in the first embodiment.
  • joint block 25 having a pipe connecting hole 26 communicating with the interior of header pipe 21 is attached to header pipe 21.
  • Joint block 25 is positioned so that joint block 25 comes into contact with both the outer surface of header pipe body 22 and the side surface of one of connecting portions 23 and 24. In this condition, joint block 25 is fixed to header pipe 21 by fastening joint block 25 to connecting portions 23 and 24 with a bolt 27.
  • joint block 25 is temporarily fixed to header pipe 21 by bolt 27 before brazing, the position of joint block 25 may be precisely maintained before and during brazing, thereby further improving brazing property.
  • joint block 25 may be temporarily fixed by another method, for example, by MIG spot welding, without using a bolt.
  • Figs. 6 to 8 depict a portion of a header pipe of a heat exchanger according to a third embodiment of the present invention.
  • header pipe 31 has a header pipe body 32 and connecting portions 33 and 34 projecting from the outer surface of header pipe body 32, similarly to that in the first embodiment.
  • semicircular recessed portions 35 and 36 or semicircular protruded portions
  • connecting portions 33 and 34 are brought into contact with each other, a space between semicircular recessed portions 35 and 36 is formed as a heat medium inlet portion 37 or a heat medium outlet portion.
  • This heat medium inlet portion 37 or a heat medium outlet portion is formed integrally with header pipe 31 easily, merely by the curling process for forming header pipe 31.
  • joint block 38 having a hole 39 for external piping is connected to header pipe 31 so that hole 39 communicates with heat medium inlet portion 37.
  • joint block 38 is brought into contact with both the outer surface of header pipe body 32 and the side surfaces of connecting portions 33 and 34.
  • Joint block 38 has a holding portion 40, and holding portion 40 is caulked onto connecting portions 33 and 34 from both sides.
  • a heat medium inlet or outlet portion may be easily formed integrally with header pipe 31 utilizing the forming of header pipe 31, and joint block 38 may be precisely positioned and may be strongly fixed by caulking.
  • the present invention may be applied to any type heat exchanger having a header pipe.
  • the present invention is suitable for multi-flow type heat exchangers used as a heater, a condenser or an evaporator for an air conditioner used in automobiles.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP98301610A 1997-03-05 1998-03-04 Wärmetauscher und Verfahren zu dessen Herstellung Withdrawn EP0863376A3 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP67437/97 1997-03-05
JP6743797 1997-03-05
JP6743797A JPH10246591A (ja) 1997-03-05 1997-03-05 熱交換器およびその製造方法

Publications (2)

Publication Number Publication Date
EP0863376A2 true EP0863376A2 (de) 1998-09-09
EP0863376A3 EP0863376A3 (de) 1999-08-11

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EP98301610A Withdrawn EP0863376A3 (de) 1997-03-05 1998-03-04 Wärmetauscher und Verfahren zu dessen Herstellung

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EP (1) EP0863376A3 (de)
JP (1) JPH10246591A (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1004841A3 (de) * 1998-11-27 2000-09-13 Calsonic Corporation Wasserkasten für Wärmetauscher
US6450253B1 (en) 1998-11-27 2002-09-17 Calsonic Kansei Corporation Tank of heat exchanger
WO2003098142A1 (de) * 2002-05-15 2003-11-27 Behr Gmbh & Co. Wärmeübertrager und verfahren zu seiner herstellung
DE10237769A1 (de) * 2002-08-17 2004-02-26 Modine Manufacturing Co., Racine Wärmeaustauscher und Verfahren zur Herstellung
EP1956333A1 (de) * 2007-02-06 2008-08-13 Behr France Hambach S.A.R.L. Wärmeübertrager insbesondere Kondensator für Klimaanlagen von Kraftfahrzeugen
WO2011120975A1 (fr) * 2010-03-31 2011-10-06 Valeo Systemes Thermiques Echangeur de chaleur à boîte collectrice tubulaire
FR2958386A1 (fr) * 2010-03-31 2011-10-07 Valeo Systemes Thermiques Bride de raccordement pour echangeur de chaleur, notamment pour vehicules automobiles
CN113587494A (zh) * 2020-04-30 2021-11-02 杭州三花微通道换热器有限公司 热交换器

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5172762A (en) * 1989-10-20 1992-12-22 Sanden Corporation Heat exchanger
US5325914A (en) * 1992-08-27 1994-07-05 Sanden Corporation Mounting bracket for a heat exchanger

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5172762A (en) * 1989-10-20 1992-12-22 Sanden Corporation Heat exchanger
US5325914A (en) * 1992-08-27 1994-07-05 Sanden Corporation Mounting bracket for a heat exchanger

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1004841A3 (de) * 1998-11-27 2000-09-13 Calsonic Corporation Wasserkasten für Wärmetauscher
US6450253B1 (en) 1998-11-27 2002-09-17 Calsonic Kansei Corporation Tank of heat exchanger
WO2003098142A1 (de) * 2002-05-15 2003-11-27 Behr Gmbh & Co. Wärmeübertrager und verfahren zu seiner herstellung
DE10237769A1 (de) * 2002-08-17 2004-02-26 Modine Manufacturing Co., Racine Wärmeaustauscher und Verfahren zur Herstellung
US6971445B2 (en) 2002-08-17 2005-12-06 Modine Manufacturing Company Heat exchanger and method of production
EP1956333A1 (de) * 2007-02-06 2008-08-13 Behr France Hambach S.A.R.L. Wärmeübertrager insbesondere Kondensator für Klimaanlagen von Kraftfahrzeugen
WO2011120975A1 (fr) * 2010-03-31 2011-10-06 Valeo Systemes Thermiques Echangeur de chaleur à boîte collectrice tubulaire
FR2958386A1 (fr) * 2010-03-31 2011-10-07 Valeo Systemes Thermiques Bride de raccordement pour echangeur de chaleur, notamment pour vehicules automobiles
FR2958388A1 (fr) * 2010-03-31 2011-10-07 Valeo Systemes Thermiques Echangeur de chaleur a boite collectrice tubulaire
CN113587494A (zh) * 2020-04-30 2021-11-02 杭州三花微通道换热器有限公司 热交换器
CN113587494B (zh) * 2020-04-30 2022-09-16 杭州三花微通道换热器有限公司 热交换器

Also Published As

Publication number Publication date
JPH10246591A (ja) 1998-09-14
EP0863376A3 (de) 1999-08-11

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