EP1003005A1 - Integrierter Wärmetauscher, insbesondere für Kraftfahrzeug - Google Patents

Integrierter Wärmetauscher, insbesondere für Kraftfahrzeug Download PDF

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Publication number
EP1003005A1
EP1003005A1 EP99122374A EP99122374A EP1003005A1 EP 1003005 A1 EP1003005 A1 EP 1003005A1 EP 99122374 A EP99122374 A EP 99122374A EP 99122374 A EP99122374 A EP 99122374A EP 1003005 A1 EP1003005 A1 EP 1003005A1
Authority
EP
European Patent Office
Prior art keywords
tubes
heat exchanger
oil
exchanger according
condenser
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.)
Granted
Application number
EP99122374A
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English (en)
French (fr)
Other versions
EP1003005B1 (de
Inventor
Christian Marsais
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 Thermique Moteur SA
Original Assignee
Valeo Thermique Moteur SA
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
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Application filed by Valeo Thermique Moteur SA filed Critical Valeo Thermique Moteur SA
Publication of EP1003005A1 publication Critical patent/EP1003005A1/de
Application granted granted Critical
Publication of EP1003005B1 publication Critical patent/EP1003005B1/de
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • 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
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F25B39/04—Condensers
    • 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
    • F28D1/0408—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
    • F28D1/0426—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids with units having particular arrangement relative to the large body of fluid, e.g. with interleaved units or with adjacent heat exchange units in common air flow or with units extending at an angle to each other or with units arranged around a central element
    • F28D1/0443—Combination of units extending one beside or one above the other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/022—Tubular elements of cross-section which is non-circular with multiple channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/01—Geometry problems, e.g. for reducing size
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0084—Condensers
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0089—Oil coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2270/00—Thermal insulation; Thermal decoupling
    • F28F2270/02—Thermal insulation; Thermal decoupling by using blind conduits
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/916—Oil cooler

Definitions

  • the invention relates to a combined heat exchanger, in particular for a motor vehicle, comprising a beam of tubes connected to manifolds and divided into two parts suitable for being traversed by different fluids.
  • the two fluids are cooled by the same air flow which sweeps the beam.
  • the invention relates more particularly to a heat exchanger combined heat into which the bundle of tubes is divided in one part forming an oil cooler, the tubes of which are suitable to be covered by oil, and in one condenser part, the tubes of which are suitable for being traversed by a refrigerant.
  • the oil is typically of transmission oil, especially for a gearbox automatic speed of motor vehicle.
  • the condenser it is used to cool the refrigerant motor vehicle air conditioning system.
  • the cooling of the refrigerant and the transmission oil cooling are made by two separate exchangers, usually one parallel flow condenser and an oil exchanger, blade type, placed near the condenser.
  • the two fluids circulate at very high temperatures. different, that of oil being much higher than that refrigerant. These temperature differences significant are likely to generate phenomena of differential expansion which can damage the heat exchanger heat and lead to leaks.
  • the invention provides a solution to the above problems.
  • the tubes of the oil cooler part and the tubes of the condenser part are different and have respective hydraulic diameters DHa and DHb such as: 0.8mm 2 ⁇ DHa x DHb ⁇ 3.00 mm 2
  • the combined heat exchanger of the invention comprises different tubes, that is to say that the tubes of the part condenser are adapted to the circulation of the refrigerant, while the tubes of the oil cooler part are adapted to the circulation of the oil.
  • the bundle tubes are advantageously multichannel tubes.
  • the hydraulic diameter of the tubes of the part oil cooler is greater than hydraulic diameter tubes of the condenser part.
  • the number of channels tubes of the oil cooler part is lower to the number of channels of the tubes of the condenser part. That in other words, means that the tubes of the part oil cooler have fewer partitions than tubes of the condenser part. This increases the hydraulic diameter and thus significantly lower the pressure drop generated by the circulation of the oil in these tubes.
  • the bundle tubes are advantageously obtained by extrusion.
  • the tubes of the harness are connected to two manifolds each of which has a partition to isolate the oil circulating in the oil cooler and fluid refrigerant circulating in the condenser part.
  • the heat exchanger comprises barrier means between the tubes of the oil cooler part and the tubes of the condenser part.
  • the means forming a thermal barrier include a beam tube, says “inactive tube” or “dead tube”, which is not traversed by no fluid and which opens out between double partitions of each of the manifolds.
  • the thermal barrier means comprise a region devoid of corrugated tabs, which extends between two adjacent tubes belonging respectively to the oil cooler part and to the condenser part.
  • the beam and the manifolds are assembled by brazing.
  • the combined heat exchanger of the invention can be produced using well-known exchanger technology brazed, such as that used for example in the production condensers.
  • the combined heat exchanger shown in Figure 1 includes a beam 10, also called a body, composed of a multiplicity of tubes 12 extending parallel to each other and between which are arranged corrugated inserts 14 forming cooling fins.
  • the ends of the tubes 12 open at one end into a manifold common 16 and, at another end, in another box common manifold 18. These two manifolds are of tubular configuration and extend parallel between they.
  • the different components of the heat exchanger i.e. the tubes 12, the fins and the manifolds 16 and 18 are metallic and joined together by brazing.
  • the beam is divided into two parts, namely a part A forming an oil cooler and composed of tubes 12a and a part B forming a condenser and composed of tubes 12b.
  • the tubes 12a are suitable for being traversed by oil H, such as transmission oil for a box of automatic vehicle gears.
  • the tubes 12b are suitable to be traversed by a refrigerant R a motor vehicle air conditioning system. It will be understood that these two fluids circulate in two different parts of the beam and are intended to be swept by the same air flow which sweeps the beam 10.
  • the manifolds 16 and 18 have partitions respective insulators 20 and 22 to isolate from each other the two fluids.
  • the partition 20 divides the manifold 16 into a compartment 24 for oil (here at the top) and a compartment 26 for the refrigerant (here placed in lower part).
  • the partition 22 divides the manifold 18 into a compartment 28 for oil (here at the top) and a compartment 30 for the refrigerant (here placed at the bottom).
  • the oil to be cooled enters compartment 24 through a inlet manifold 32, then flows through tubes 12a through a parallel flow to reach compartment 28. It then leaves compartment 28 via an outlet pipe 34.
  • Compartment 26 is itself divided into two parts, namely an upper part 36 and a lower part 38, by a partition 40.
  • compartment 30 of the box collector 18 is divided into two parts, namely a upper part 42 and lower part 44, by a partition 46.
  • the refrigerant R enters the compartment 36 through a tube 48, circulates in part of the tubes 12b to reach compartment 42, then circulates in opposite direction to reach compartment 38. Then the refrigerant reaches compartment 44, circulating at again in reverse, and leaves the heat exchanger by an outlet pipe 50.
  • the fluid refrigerant R circulates alternately in a three passes.
  • partitions 20 and 22 constitute thermal insulation since the oil H is at a temperature much higher than that of refrigerant R.
  • the tubes 12a and 12b are flat tubes multi-channel, obtained by extrusion from an alloy suitable metal, usually aluminum based.
  • each tube 12a (FIG. 2) has two channels 52 separated by a partition 54, while each tube 12b ( Figure 3) has four channels 56 separated by three partitions 58.
  • the tubes 12a and 12b have the same cross section exterior, allowing standardization of manufacturing, in the sense that the ends of the tubes are received in identical holes arranged in the boxes manifolds 16 and 18.
  • the tubes 12a and 12b have DH hydraulic diameters, DHa and DHb respectively.
  • the tubes 12a and 12b thus have their own characteristics allowing them to be adapted respectively to cooling oil and cooling the refrigerant. Of causes tubes 12a to have fewer channels (and therefore fewer partitions) that the tubes 12b, the hydraulic diameter of the tubes 12a is increased, which allows lowering so significant pressure drop generated by the circulation of oil in tubes 12a.
  • the product DHa X DHb has a value which falls within an interval defined by the following inequality: 0.8mm 2 ⁇ DHa x DHb ⁇ 3.00 mm 2 .
  • insulating partitions 20 and 22 which, advantageously, can be double partitions.
  • FIG. 4 shows another embodiment of the invention with means forming thermal barrier between the tubes 12a and the tubes 12b.
  • the bundle 10 comprises a inactive tube 12i, also called “dead tube”, which is not traversed by no fluid and which leads between a double partition 20 of the manifold 16 and a double partition 22 of the manifold 18.
  • inactive tube 12i also called “dead tube”
  • the heat exchanger of Figure 5 has other means forming a thermal barrier.
  • the beam is fitted out so as to include a region 60 devoid of corrugated tabs, which extends between parts A and B of the bundle, that is to say between two adjacent tubes 12a and 12b belonging to these two parts A and B.
  • the tubes 12a and 12b have each a length of 600 mm.
  • the hydraulic diameter DHa of each of the tubes 12a is equal to 1.6, while the diameter hydraulic DHb of each of the tubes 12b is equal to 1.313, the product DHa x DHb thus being equal to 2.1.
EP99122374A 1998-11-20 1999-11-10 Integrierter Wärmetauscher, insbesondere für Kraftfahrzeug Revoked EP1003005B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9814655A FR2786259B1 (fr) 1998-11-20 1998-11-20 Echangeur de chaleur combine, en particulier pour vehicule automobile
FR9814655 1998-11-20

Publications (2)

Publication Number Publication Date
EP1003005A1 true EP1003005A1 (de) 2000-05-24
EP1003005B1 EP1003005B1 (de) 2004-03-10

Family

ID=9533009

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99122374A Revoked EP1003005B1 (de) 1998-11-20 1999-11-10 Integrierter Wärmetauscher, insbesondere für Kraftfahrzeug

Country Status (7)

Country Link
US (1) US6394176B1 (de)
EP (1) EP1003005B1 (de)
AT (1) ATE261573T1 (de)
BR (1) BR9905655A (de)
DE (1) DE69915431T2 (de)
ES (1) ES2217672T3 (de)
FR (1) FR2786259B1 (de)

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DE10158436A1 (de) * 2001-11-29 2003-06-12 Behr Gmbh & Co Wärmetauscher
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US7337832B2 (en) 2003-04-30 2008-03-04 Valeo, Inc. Heat exchanger
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US7527087B2 (en) 2003-06-30 2009-05-05 Valeo, Inc. Heat exchanger
EP2171387A1 (de) * 2007-06-20 2010-04-07 Halla Climate Control Corporation Kühlsystem für ein fahrzeug
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BR9905655A (pt) 2000-09-12
EP1003005B1 (de) 2004-03-10
US6394176B1 (en) 2002-05-28
DE69915431T2 (de) 2004-08-19
FR2786259A1 (fr) 2000-05-26
FR2786259B1 (fr) 2001-02-02
ATE261573T1 (de) 2004-03-15
ES2217672T3 (es) 2004-11-01
DE69915431D1 (de) 2004-04-15

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