EP3550250B1 - Wärmetauscher - Google Patents

Wärmetauscher Download PDF

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Publication number
EP3550250B1
EP3550250B1 EP18461545.8A EP18461545A EP3550250B1 EP 3550250 B1 EP3550250 B1 EP 3550250B1 EP 18461545 A EP18461545 A EP 18461545A EP 3550250 B1 EP3550250 B1 EP 3550250B1
Authority
EP
European Patent Office
Prior art keywords
housing
heat exchanger
header
supporting sections
core
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.)
Not-in-force
Application number
EP18461545.8A
Other languages
English (en)
French (fr)
Other versions
EP3550250A1 (de
Inventor
Radoslaw Jonczyk
Janusz Rod
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.)
Valeo Autosystemy Sp zoo
Original Assignee
Valeo Autosystemy Sp zoo
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 Valeo Autosystemy Sp zoo filed Critical Valeo Autosystemy Sp zoo
Priority to EP18461545.8A priority Critical patent/EP3550250B1/de
Priority to PCT/EP2019/058542 priority patent/WO2019193110A1/en
Publication of EP3550250A1 publication Critical patent/EP3550250A1/de
Application granted granted Critical
Publication of EP3550250B1 publication Critical patent/EP3550250B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • 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

Definitions

  • the present invention relates to a heat exchanger, especially to a heat exchanger for a vehicle, with improved means for positioning a housing in a header of the water cooled heat exchanger.
  • a conventional prior art heat exchanger (see e.g. document US 2010 089548 , which discloses the preamble of claim 1) comprises a core and two headers situated at two longitudinal ends of the core.
  • One header is connected to an inlet tank, while the other is connected to an outlet tank.
  • the heat exchanger comprises a housing, which encloses the core. Longitudinal ends of the housing are received in the headers.
  • the housing when inserted into the header, rests on a bottom of the header and contact surfaces between the housing and the headers should be as flat an uniform as possible. All components of the heat exchanger are connected to one another by brazing.
  • the contact surfaces can become uneven or can be provided with ridges and folds.
  • the housing can be twisted or lilted with respect to the headers. This in turn can compromise proper contact between the housing and the headers, especially at a brazing area. It also means that the housing and the headers may not be properly brazed to one another, which may lead to leaks, especially at areas near corners of the headers.
  • the housing comprises a series of protruding tabs, which are received in cut-outs of the headers when the housing rests on the headers.
  • the tabs help to maintain the position of the housing with respect to the headers when the heat exchanger is first assembled. Still, following brazing and due to any manufacture defects of the headers, the tabs can slid out of the cut-outs. In result, the housing can rotate/tilt with respect to the headers and this can lead to the situation, where non-brazed areas are formed between the housing and the headers, which in turn can be a source of leaks.
  • housings used in a heat exchanger consist of a few separate plates, which are connected to one another to form the housing itself. Due to machining restrictions corresponding corners of the headers cannot imitate, at their entire length down to the bottom of the headers, the shape of the corners of the housing what means that the housing can be blocked too early at its corners in the headers. In other words the housing can be tilted with respect to the headers, which affects the brazing quality.
  • the purpose of the present invention is to provide a heat exchanger, which would overcome the drawbacks described in connection with the prior art.
  • the purpose of the present invention is to provide a heat exchanger, in which the housing and the headers would be properly brazed to one another at their entire perimeters, what significantly reduces the risk of any leaks being formed.
  • a heat exchanger comprises a core, at least one header situated at and connected to least one end of the core and a housing enclosing the core.
  • the housing is received in the at least one header.
  • the at least one header is provided at its bottom with supporting sections.
  • the supporting sections are provided at the bottom in positions, which correspond to positions of walls of the housing, which need be sealed.
  • the housing rests on the supporting sections so that a gap is created between the housing and the bottom of the at least one header.
  • the heat exchanger according to the present invention provides a reliable solution, which ensures a sealed connection between the housing and the header(s).
  • Use of the supporting sections results in the housing being separated in a longitudinal direction of the housing and the core from the bottom of the header (s) in a repeatable and predictable manner. Any defects in the manufacturing and brazing processes of the heat exchanger, especially the bottom of the header, does not affect the position of the housing because any folds and creases created at the bottom of the header do not extend high enough to reach an edge of the housing, which is in contact with the supporting sections.
  • the supporting sections provide well defined contact points between the housing and the headers. Any randomness of the contact points is almost entirely reduced.
  • the present invention provides a continuous and stable brazing area between the walls of the housing and a peripheral wall of the header. It means that the relative position of the housing and the header does not change during brazing and a solder can easily solidify and bond to the housing and the header at the entire brazing area, leaving no non-brazed points.
  • a heat exchanger 1 comprises a core 2 and two headers 3 situated at and connected to two longitudinal ends of the core 2.
  • the heat exchanger 1 further comprises an inlet tank 4 and an outlet tank 5.
  • the inlet and outlet tanks 4, 5 are connected to the headers 3 and are used to deliver a fluid to be cooled down, preferably air, to and out of the core 2.
  • the core 2 includes a plurality of flat hollow flow tubes 21 and a plurality of flow turbulators 22 placed therebetween.
  • the flat hollow flow tubes 21 are in fluid communication, through the headers 3, with the inlet and outlet tanks 4, 5 and define together a first fluid circuit for the fluid to be cooled down.
  • the heat exchanger 1 further comprises a housing 6, shown schematically in Fig. 1 , which encloses and seals the core 2.
  • the housing 6 defines a second fluid circuit for a coolant.
  • the housing 6 comprises inlet and outlet ports 61, shown schematically in Figure 1 , through which the coolant flows into and out of the housing 6.
  • the housing 6 is made of two opposing plate members 62 and two outermost flat hollow flow tubes 21, which are connected to one another at their edges.
  • the housing 6 is inserted with its longitudinal ends, with respect to a longitudinal direction A of the heat exchanger 1, the core 2 and the housing 6, into the headers 3.
  • the header 3 comprises a peripheral wall 31 and a bottom 32.
  • the peripheral wall 31 has teeth 33 protruding therefrom in the longitudinal direction A of the heat exchanger 1, which are bent over the inlet and outlet tanks 4, 5 to connect the inlet and outlet tanks 4, 5 to the headers 3.
  • the bottom 32 comprises a plurality of slots 34, which receive the flat hollow flow tubes 21 of the core 2.
  • the header 3 is provided at the bottom 32 with a series of supporting sections 35, preferably in the form of steps, which protrude from the bottom 32 in the vicinity of the peripheral wall 31 towards the housing 6.
  • the supporting sections 35 are in contact with the peripheral wall 31.
  • the supporting sections 35 can be 0.1-5.0 mm high, as measured from the bottom 32 of the header 3 towards the housing 6.
  • the supporting sections 35 of the header 3 are provided at positions, which correspond to positions of walls of the housing 6, which need be sealed with respect to the header 3.
  • the walls of the housing 6 to be sealed are two opposing plate members 62. Therefore, the supporting sections 35 are located at the bottom 32 next to two opposing portions of the peripheral wall 31 of the header 3, which correspond to the two opposing plate members 62 of the housing 6. In other words the supporting sections are 35 associated with the walls of the housing 6, which need be sealed.
  • the header 3 and the housing 6 have a square/rectangular cross section with corners and the supporting sections 35 are located near the corners of the header 3, next to the aforementioned two opposing portions of the peripheral wall 31. More precisely, four supporting sections 35 are provided and they are divided into two sets, two supporting sections 35 in each set, and these two sets are located at two opposing portions of the bottom 32, each supporting section 35 near respective corner of the header 3, as shown in fig. 3 .
  • a gap 7 is formed between the housing 6 and the bottom 32 of the header 3.
  • the housing 6 is not in direct contact with the bottom 32 and is spaced apart from the bottom 32.
  • This also ensures that contact points between the housing 6 and the header 3 are well defined and controlled. Otherwise, due to errors and imperfections in the header manufacturing process the bottom 32 could include ridges and folds protruding from the bottom and the contact points would be random, which could lead to non-sealed connection between the housing 6 and the header 3 and resultant leaks.
  • a secondary effect is that a continuous and uniform brazing/contact area is ensured between the housing 6 and the peripheral wall 31 of the header 3.
  • the present invention is not limited to the embodiments described above.
  • the form/shape of the supporting sections 35 can vary.
  • the supporting sections 35 can have a cuboid form with a flat top, as shown in Figs. 2-4 .
  • the supporting sections 35 can have a rounded form, as shown in fig. 5 .
  • the housing 6 was defined as being made of two opposing plate members 62 and two outermost flat hollow flow tubes 22.
  • the housing 6 can comprise four separate plates, which together form the housing 6 itself, are connected to one another at their edges and enclose the core 2 therein.
  • all four separate plates of the housing 6 are walls that need be sealed.
  • the supporting sections 35 are located near each portion of the peripheral wall 31 of the header 3.
  • the plates of the housing 6 need not be necessarily flat.
  • the plates can have other shapes, if desirable.
  • the heat exchanger 1 can also comprise only one header 3, which is situated at and connected to one end of the core 2.
  • the core 2 defines a U-shaped first fluid circuit, which starts and ends at the same one header 3.
  • the header 3 comprises and inlet and outlet ports or one inlet/outlet tank is connected thereto.
  • the housing 6 encloses the core 2 and is received with its one end in the one header 3, while the other end of the housing 6 is closed.
  • All components of the heat exchanger 1, namely the core 2, the header(s) 3, the inlet/outlet tank(s) 4, 5 and the housing 6, are connected to each other by brazing.
  • Materials used for the heat exchanger 1 are those suitable for brazing, for example aluminum and its alloys.
  • the walls of the housing 6 that need be sealed are two opposing plate members 62, for the reasons explained above.
  • the supporting sections 35 ensure that the contact points between the two opposing plate members 62 and the header 3 are well defined and the two opposing plate members 62 rest in place when the heat exchanger 1 is assembled and brazed.
  • the outermost flat hollow flow tubes 21, which also form the housing 6, are already inserted into slots 34 of the headers 3. This connection is usually subject to different tolerance requirements and in itself is relatively more fluid-tight. It means that the outermost flat hollow flow tubes 21 are properly brazed to the header 3 without the need for assisting arrangements. If the housing 6 includes four separate plate members, which define the housing 6 itself and enclose entirely the core 2 therein all these four separate plate members are walls of the housing 6 that need be sealed.
  • walls of the housing 6, which need be sealed are to be understood as walls of the housing 6 that are likely to be susceptible to connection issues as explained above. Consequently, if the terminal flat hollow flow tubes 21 constitute a part of the housing 6, they need not be sealed in this sense, as they way of connecting the tubes 21 via introduction into the header slots 34 implies smaller susceptibility to leaks (for example, there are stricter tolerance requirements, and the tubes 21 and/or slots 34 are dimensioned so that the tubes 21 need to be pushed inside the slots 34, etc.). Moreover, a wall of the housing 6 is to be understood as one essentially continuous wall/surface of the housing 6 limited by edges/abrupt bends.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Claims (9)

  1. Wärmetauscher (1), Folgendes umfassend:
    einen Kern (2);
    mindestens ein Sammelrohr (3), das sich an mindestens einem Ende des Kerns (2) befindet und damit verbunden ist; und
    ein Gehäuse (6), das den Kern (2) umschließt, wobei das Gehäuse (6) in dem mindestens einen Sammelrohr (3) aufgenommen ist;
    dadurch gekennzeichnet, dass
    das mindestens eine Sammelrohr (3) an seinem Boden (32) mit Stützabschnitten (35) versehen ist;
    wobei die Stützabschnitte (35) am Boden (32) an Positionen vorgesehen sind, die zu den Positionen der Wände des Gehäuses (6) passen, die abgedichtet werden müssen; und
    wobei das Gehäuse (6) auf den Stützabschnitten (35) aufliegt, sodass ein Spalt (7) zwischen dem Gehäuse (6) und dem Boden (32) des mindestens einen Sammelrohrs (3) erzeugt wird.
  2. Wärmetauscher nach Anspruch 1, dadurch gekennzeichnet, dass die Stützabschnitte (35) vom Boden (32) des mindestens einen Sammelrohrs (3) zum Gehäuse (6) gemessen 0,1-5,0 mm hoch sind.
  3. Wärmetauscher nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Stützabschnitte (35) quaderförmig sind.
  4. Wärmetauscher nach einem der Ansprüche 1-2, dadurch gekennzeichnet, dass die Stützabschnitte (35) rund sind.
  5. Wärmetauscher nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Kern (2) mehrere flache, hohle Strömungsrohre (21) umfasst und der Wärmetauscher (1) zwei entgegengesetzte Plattenelemente (62) umfasst, wobei die zwei äußersten flachen, hohlen Strömungsrohre (21) und die zwei entgegengesetzten Plattenelemente (62) zusammen das Gehäuse (6) definieren, wobei die Stützabschnitte (35) am Boden (32) an Positionen vorgesehen sind, die zu den Positionen der zwei entgegengesetzten Plattenelemente (62) passen.
  6. Wärmetauscher nach Anspruch 5, dadurch gekennzeichnet, dass er vier Stützabschnitte (35) umfasst und die Stützabschnitte (35) in zwei Sätze unterteilt sind, wobei jeder Satz zwei Stützabschnitte (35) umfasst, wobei sich die Sätze passend zu den Positionen der zwei entgegengesetzten Plattenelemente (62) an zwei entgegengesetzten Abschnitten des Bodens (32) befinden.
  7. Wärmetauscher nach einem der Ansprüche 1-4, dadurch gekennzeichnet, dass das Gehäuse (6) vier Plattenelemente umfasst, die an ihren Kanten miteinander verbunden sind und das Gehäuse (6) definieren, wobei die Stützabschnitte (35) am Boden (32) an Positionen vorgesehen sind, die zu den Positionen der vier Plattenelemente passen.
  8. Wärmetauscher nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das mindestens eine Sammelrohr (3) und das Gehäuse (6) beide einen rechteckigen Querschnitt mit Ecken aufweisen, wobei sich die Stützabschnitte (35) in der Nähe der Ecken des mindestens einen Sammelrohrs (3) befinden.
  9. Wärmetauscher nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass er zwei Sammelrohre (3) umfasst, wobei das Gehäuse (6) mit seinen zwei Enden in Längsrichtung in den zwei Sammelrohren (3) aufgenommen ist.
EP18461545.8A 2018-04-05 2018-04-05 Wärmetauscher Not-in-force EP3550250B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP18461545.8A EP3550250B1 (de) 2018-04-05 2018-04-05 Wärmetauscher
PCT/EP2019/058542 WO2019193110A1 (en) 2018-04-05 2019-04-04 Heat exchanger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18461545.8A EP3550250B1 (de) 2018-04-05 2018-04-05 Wärmetauscher

Publications (2)

Publication Number Publication Date
EP3550250A1 EP3550250A1 (de) 2019-10-09
EP3550250B1 true EP3550250B1 (de) 2020-12-16

Family

ID=61911503

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18461545.8A Not-in-force EP3550250B1 (de) 2018-04-05 2018-04-05 Wärmetauscher

Country Status (2)

Country Link
EP (1) EP3550250B1 (de)
WO (1) WO2019193110A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4382847A1 (de) * 2022-12-05 2024-06-12 Valeo Systemes Thermiques Wärmetauscher für fahrzeuge

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100089548A1 (en) * 2007-04-11 2010-04-15 Viorel Braic Heat exchanger

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10233407B4 (de) * 2001-07-26 2016-02-18 Denso Corporation Abgaswärmeaustauscher
ES2260971B1 (es) * 2003-06-20 2008-02-16 Valeo Termico, S.A. Intercambiador de calor para gases, en especial de los gases de escape de un motor.
JP4931390B2 (ja) * 2005-09-12 2012-05-16 臼井国際産業株式会社 Ｅｇｒガス冷却装置
DE102010040983A1 (de) 2010-09-17 2012-03-22 Behr Gmbh & Co. Kg Gaskühler

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100089548A1 (en) * 2007-04-11 2010-04-15 Viorel Braic Heat exchanger

Also Published As

Publication number Publication date
WO2019193110A1 (en) 2019-10-10
EP3550250A1 (de) 2019-10-09

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