EP2317271A1 - Radiateur à débit en U doté d'un réservoir terminal avec un séparateur en forme de Z - Google Patents

Radiateur à débit en U doté d'un réservoir terminal avec un séparateur en forme de Z Download PDF

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Publication number
EP2317271A1
EP2317271A1 EP09174690A EP09174690A EP2317271A1 EP 2317271 A1 EP2317271 A1 EP 2317271A1 EP 09174690 A EP09174690 A EP 09174690A EP 09174690 A EP09174690 A EP 09174690A EP 2317271 A1 EP2317271 A1 EP 2317271A1
Authority
EP
European Patent Office
Prior art keywords
tubes
tank
chamber
separating member
group
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Withdrawn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
EP09174690A
Other languages
German (de)
English (en)
Inventor
Tomasz Dariusz Frankiewicz
Krzysztof Obsadny
Grzegorz Marcin Jarosik
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.)
Delphi Technologies Inc
Original Assignee
Delphi Technologies Inc
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 Delphi Technologies Inc filed Critical Delphi Technologies Inc
Priority to EP09174690A priority Critical patent/EP2317271A1/fr
Publication of EP2317271A1 publication Critical patent/EP2317271A1/fr
Withdrawn legal-status Critical Current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
    • F28F9/0202—Header boxes having their inner space divided by partitions
    • F28F9/0204—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions
    • F28F9/0207—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions the longitudinal or transversal partitions being separate elements attached to header boxes
    • 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
    • F28D1/04—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 tubular conduits
    • F28D1/053—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 tubular conduits the conduits being straight
    • F28D1/0535—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 tubular conduits the conduits being straight the conduits having a non-circular cross-section
    • F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
    • F28D1/05391—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits combined with a particular flow pattern, e.g. multi-row multi-stage radiators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2210/00—Heat exchange conduits
    • F28F2210/08—Assemblies of conduits having different features

Definitions

  • the invention relates to a U-flow heat exchanger for a motor vehicle.
  • Heat exchangers such as radiators are commonly used in automobiles having an internal combustion engine to convey heat away from hot engine components to the cooler ambient air.
  • a radiator is part of a closed loop system wherein the radiator is hydraulically connected to passageways within an engine through which a heat transfer fluid, such as a mixture of water and ethylene glycol, is circulated.
  • a typical U-flow radiator is formed of a central core having a multitude of parallel tubes with fins therebetween to increase the surface area for optimal heat dissipation. Hydraulically attached to either end of the core that corresponds with the tube openings is an end tank. After absorbing heat from a heat source, the heat transfer fluid enters a first chamber of a first end tank, called I/O tank (In & Out tank), where the fluid flow is uniformly distributed through a first group of parallel tubes. The fluid flows through the first group of parallel tubes to a second end tank, called return tank, where the fluid flow is redirected towards the I/O tank through a second group of parallel tubes.
  • I/O tank In & Out tank
  • the fluid enters a second chamber of the I/O tank before exiting the radiator returning to the heat source to repeat the heat transfer process.
  • heat is radiated to the ambient air.
  • a stream of ambient air is blown perpendicularly relative to the radiator core through the fins.
  • the I/O tank is provided with a separating wall located in the middle of the tank, across the tank and between two tubes.
  • the present invention provides a U-flow heat exchanger comprising of a heat exchange core having a plurality of tubes, an I/O tank connected to a first end of the core through a header plate, and a return tank connected to a second end of the core, said I/O tank being divided into a first chamber and a second chamber by a separating member, a first group of tubes being in communication with the first chamber through the header plate, a second group of tubes being in communication with the second chamber through the header plate, characterized in that the separating member is configured such that a third group of tubes, arranged between the first and the second groups, is in communication with the first chamber on one side of the separating member and with the second chamber on the other side of the separating member.
  • Fig. 1 is an exploded perspective view of a first embodiment of the heat exchanger 10 according to the present invention.
  • the heat exchanger 10 includes a core 12 having a bundle of flat B-tubes 14 that are substantially parallel.
  • the tubes 14 are jointed longitudinally by conventional means such as welding, brazing or soldering to a supporting structure such as fins 16 between the tubes 14.
  • the core 12 has two core ends 18, 20 corresponding with tube openings 22.
  • Each core end 18, 20 is attached to an end tank assembly 24, 26 that comprises of an end tank 28, a gasket 30, and a header plate 32.
  • the tube openings 22 are affixed to elongated perforations 34 located on the header plate 32 by conventional means such as welding, brazing or soldering.
  • the header plate 32 is mechanically attached to the end tank 28 with the gasket 30 between the contact surfaces of the header plate 32 and of the end tank 28.
  • the end tank 28 has two longitudinal side walls 36, 38 that are integral with a bottom wall 40 along a longitudinal axis A1 and two end walls 42, 44 along a latitudinal axis A2 defining an elongated cavity 46.
  • the tank opening is defined by a perimeter tank foot 48 that protrudes laterally outward from the exterior edges of the two side walls 36, 38 and exterior edges of the two end walls 42, 44.
  • the end tank 28 is shown substantially rectangular in appearance.
  • the present invention does not intend the substantially rectangular shape to be limiting, but can also encompass other elongated shapes with an open face along the longitudinal axis.
  • the heat exchanger 10 shown on the figures is a U-flow radiator. It comprises a first end tank assembly 24 called I/O tank to which the coolant circuit is connected upwardly and downwardly, and a second end tank assembly 26 called return tank, which redirects the fluid flow from the I/O tank 24 to the I/O tank 26.
  • the heat transfer fluid or coolant After absorbing heat from a heat source, the heat transfer fluid or coolant enters a first chamber 50 of the I/O tank, where the fluid flow is uniformly distributed through a first group G1 of parallel tubes 14. The fluid flows through the first group G1 of parallel tubes 14 to the return tank 26, where the fluid flow is redirected towards the I/O tank 24 through a second group G2 of parallel tubes 14. Then the fluid enters a second chamber 52 of the I/O tank 24 before exiting the radiator 10 returning to the heat source to repeat the heat transfer process.
  • the incoming coolant flow is hot and the coolant flow exiting the radiator 10 is relatively cold, with regards to the incoming coolant flow.
  • the elongated cavity 46 of the I/O tank 24 is provided with a separating member 54 located substantially in the middle of the tank 24.
  • the separating member 54 is a Z-shape separator which is configured such that there is a U-flow of coolant not only between the two groups G1, G2 of tubes 14 but also between two portions of each single tube of a third group G3. So there is a "double U-flow" in the radiator 10.
  • the Z-shape separator 54 is constituted of a main longitudinal wall 56 substantially orthogonal to the header plate 32, said main longitudinal wall 56 being provided at each extremity with respectively a first transversal end wall 58 and a second transversal end wall 60, each transversal wall 58, 60 extending towards opposite side walls 36, 38 of the end tank 28.
  • the transversal walls 58, 60 are orthogonal to the longitudinal wall 56 and their edge comes into tightening contact with the corresponding inner surface of the end tank 28 in order to form a seal between the two chambers 50, 52, as shown on figures 2 and 3 .
  • each transversal wall 58, 60 extends transversally between two adjacent flat tubes 14 and the main longitudinal wall 56 extends above the flat tube openings 22 of the third group G3 of tubes 14.
  • the tubes 14 in the first embodiment are all flat B-tubes having two parallel ports 62, 64
  • the main longitudinal wall 56 bears on the middle portion of the tubes 14, such that a first port 62 of the tube 14 is opened into the first chamber 50 whereas a second port 64 of the same tube 14 is opened into the second chamber 52.
  • the tubes 14 could be multiport tubes having more that two parallel ports.
  • the separator 54 has special cut-outs forming teeth 66 along the lower edge 68 to be in direct contact with the tubes 14 in order to ensure good tightness between the two chambers 50, 52 and in order to avoid tubes deformation during clinching operation of the different parts forming the I/O tank assembly 24.
  • the upper edge 70 of the separator 54 (orientated downwardly on figures 2 and 4 ) is provided with a complementary profile to match with the corresponding profile of the end tank 28 bottom wall 40, in order to ensure tightening contact and good separation between the two chambers 50, 52.
  • the upper edge 70 comprise a bumped portion 72 corresponding to a recess 74 formed in the bottom wall 40 for arranging a connection port 76.
  • the coolant flow enters the first chamber 50 of the I/O tank 24 where it is uniformly distributed through the first group G1 of tubes 14 and through the first port 62 of the third group G3 of tubes 14.
  • the fluid flows through the core 12 and through the return tank 26 where it is redirected towards the I/O tank 24.
  • the fluid flows into the second chamber 52 through the second group G2 of tubes 14 and through the second port 64 of the third group G3 of tubes 14.
  • arrow F1 which shows the fluid transfer from the first group G1 to the second group G2
  • arrow F2 which shows the fluid transfer from the first ports 62 of the third group G3 to the second ports 64 of the third group G3.
  • the thermal stress between the cold side and the hot side of the radiator 10 was located exclusively along two adjacent tubes in the middle of the radiator 10. Thanks to the separator 54 according to the present invention, the thermal stress is spread on several tubes 14.
  • the size of the transitional zone between the cold side and the hot side of the radiator 10 can be adjusted easily by selecting the appropriate length for the main longitudinal wall 56 of the separator 54.
  • the separator 54 can be orientated in such a way that the hot side of the third group G3 of tubes 14 is located either on the front side of the radiator 10 or on the rear side of the radiator 10, depending for example on the particular arrangement of the radiator 10 in the vehicle.
  • the arrangement tightness of the separator 54 in the I/O tank 24 is configured such that an adjusted fluid leakage is created between the two chambers 50, 52.
  • an adjusted space between the edges of the separator 54 and the corresponding inner walls of the end tank 28 such as to create a fluid leakage of 250 1/min.
  • the leakage can be up to 800 1/min.
  • the leakage can also be created and adjusted thanks to the arrangement of through holes in the separator 54.
  • This adjusted leakage can help to avoid thermal stresses in the tubes as the coolant leaking through the separator can flow quicker than by the tubes which can decrease the temperature more quickly on the second side of the separator 54 corresponding to the second chamber 52.
  • This leakage constitutes a third U-flow.
  • the third group G3 of tubes 14 is constituted of single tubes 78 arranged separately on each side of the separator 54.
  • This embodiment allows simplifying the design of the separator 54 lower edge 68.
  • Each single tube 78 could have one or several ports.
  • the tightening on separator 54 can be achieved by adding an additional gasket 80 on the separator lower edge 68.
  • the additional gasket 80 can exist as a separate part or can be made of one pas with the gasket 30 used to tighten the end tank 28 to the header plate 32.
  • the separator 54 is made of a separate part assembled to the I/O tank 24.
  • the separator 54 could be made of one piece with the end tank 28.

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)
EP09174690A 2009-10-30 2009-10-30 Radiateur à débit en U doté d'un réservoir terminal avec un séparateur en forme de Z Withdrawn EP2317271A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09174690A EP2317271A1 (fr) 2009-10-30 2009-10-30 Radiateur à débit en U doté d'un réservoir terminal avec un séparateur en forme de Z

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09174690A EP2317271A1 (fr) 2009-10-30 2009-10-30 Radiateur à débit en U doté d'un réservoir terminal avec un séparateur en forme de Z

Publications (1)

Publication Number Publication Date
EP2317271A1 true EP2317271A1 (fr) 2011-05-04

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EP09174690A Withdrawn EP2317271A1 (fr) 2009-10-30 2009-10-30 Radiateur à débit en U doté d'un réservoir terminal avec un séparateur en forme de Z

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015122053A1 (de) * 2015-12-17 2017-06-22 Denso Automotive Deutschland Gmbh Heizwärmetauscher
FR3064734A1 (fr) * 2017-04-04 2018-10-05 Valeo Systemes Thermiques Echangeur de chaleur a circulation de fluide en u

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0640804A1 (fr) * 1993-08-30 1995-03-01 Sanden Corporation Echangeur de chaleur et arrangement de tubes pour cela
US20050006067A1 (en) * 2001-11-29 2005-01-13 Markus Hoglinger Heat exchanger
EP1811260A2 (fr) * 2006-01-19 2007-07-25 Behr GmbH & Co. KG Echangeur de chaleur
US20070289727A1 (en) * 2004-06-04 2007-12-20 Behr Gmbh & Co. Kg Heat Exchanger

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0640804A1 (fr) * 1993-08-30 1995-03-01 Sanden Corporation Echangeur de chaleur et arrangement de tubes pour cela
US20050006067A1 (en) * 2001-11-29 2005-01-13 Markus Hoglinger Heat exchanger
US20070289727A1 (en) * 2004-06-04 2007-12-20 Behr Gmbh & Co. Kg Heat Exchanger
EP1811260A2 (fr) * 2006-01-19 2007-07-25 Behr GmbH & Co. KG Echangeur de chaleur

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015122053A1 (de) * 2015-12-17 2017-06-22 Denso Automotive Deutschland Gmbh Heizwärmetauscher
DE102015122053B4 (de) 2015-12-17 2022-11-03 Denso Automotive Deutschland Gmbh Heizwärmetauscher
FR3064734A1 (fr) * 2017-04-04 2018-10-05 Valeo Systemes Thermiques Echangeur de chaleur a circulation de fluide en u
EP3385655A1 (fr) * 2017-04-04 2018-10-10 Valeo Systemes Thermiques-THS Echangeur de chaleur a circulation en u

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