EP0519334A2 - Echangeur de chaleur à tubes plats, procédé pour sa fabrication, applications et tubes plats pour échangeur de chaleur - Google Patents

Echangeur de chaleur à tubes plats, procédé pour sa fabrication, applications et tubes plats pour échangeur de chaleur

Info

Publication number
EP0519334A2
EP0519334A2 EP92109870A EP92109870A EP0519334A2 EP 0519334 A2 EP0519334 A2 EP 0519334A2 EP 92109870 A EP92109870 A EP 92109870A EP 92109870 A EP92109870 A EP 92109870A EP 0519334 A2 EP0519334 A2 EP 0519334A2
Authority
EP
European Patent Office
Prior art keywords
flat
heat exchanger
flat tubes
sides
exchanger according
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
EP92109870A
Other languages
German (de)
English (en)
Other versions
EP0519334A3 (en
EP0519334B1 (fr
Inventor
Roland Dipl.-Ing. Haussmann
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.)
Thermal-Werke Warme- Kalte- Klimatechnik GmbH
Original Assignee
Thermal-Werke Warme- Kalte- Klimatechnik GmbH
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
Priority claimed from DE4120442A external-priority patent/DE4120442A1/de
Application filed by Thermal-Werke Warme- Kalte- Klimatechnik GmbH filed Critical Thermal-Werke Warme- Kalte- Klimatechnik GmbH
Publication of EP0519334A2 publication Critical patent/EP0519334A2/fr
Publication of EP0519334A3 publication Critical patent/EP0519334A3/de
Application granted granted Critical
Publication of EP0519334B1 publication Critical patent/EP0519334B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F28D1/05383—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel 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
    • 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
    • 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
    • F28F9/0224—Header boxes formed by sealing end plates into covers
    • 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
    • F28F9/182—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding the heat-exchange conduits having ends with a particular shape, e.g. deformed; the heat-exchange conduits or end plates having supplementary joining means, e.g. abutments
    • 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
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
    • F28F2250/02—Streamline-shaped 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
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction

Definitions

  • the invention relates to a flat tube heat exchanger according to the preamble of claim 1.
  • a flat tube heat exchanger is known for example from DE-A1-37 20 483 (Fig. 4).
  • the invention further relates to a manufacturing method of such a flat tube heat exchanger, applications and flat tubes for installation in the flat tube heat exchanger according to the invention.
  • Zigzag lamellas and with these equivalent lamellas - in the following also sometimes just called lamellas - are sandwiched in the sequence flat tube - (zigzag) lamella - flat tube - (zigzag) lamella - etc. side by side.
  • This arrangement is not equivalent to the insertion of tubes into fins of plate packs, usually provided with collars, where, unlike the flat tube heat exchangers of the invention, the fins or their collars surround the respective tube all around (see, for example, GB-A-538 018 ); the latter arrangement is therefore not considered in the context of the invention drawn.
  • the known profiles of the narrow sides of the flat tubes prove to be only conditionally favorable in terms of flow with regard to the external heat exchange fluid passing through the fins, e.g. of an air flow.
  • the c W value ie the coefficient of resistance of the heat exchanger with respect to the flow of the external heat exchange medium
  • the pressure loss of the external heat exchange medium is thereby reduced. It is used when installing in motor vehicles At the same time, external rockfall is better discharged, provided that it does not directly hit the apex area of the rounded narrow sides.
  • the elongated rounded narrow sides offer the possibility that the fins now not only abut the flat sides of adjacent flat tubes, but also grip the flat tubes positively over a significant length of the profile and thus prevent them from slipping in the longitudinal direction L of the flat tube profile before being soldered Form locking are secured.
  • the overall depth in the area of the collector is the determining dimension when installing it in a motor vehicle, for example.
  • this installation dimension in general, there is a tendency to keep this installation dimension as small as possible, since the total length of the motor vehicle or its engine compartment, including the material consumption associated with this length problem, depends on the motor vehicle construction itself.
  • a saving of 3 mm in the collector area leads to a saving of 10 to 20 kg vehicle weight, especially sheet metal, depending on the vehicle type.
  • the collector could also be made from a plastic, for example, if the possibility of soldering, or an equivalent, is ensured, e.g. in the case of the plastic. a plastic weld.
  • soldering or an equivalent
  • the flat tubes are extruded profiles.
  • internal stiffeners such as the known intermediate webs
  • claims 14 to 17 are preferred and their magnitudes also correspond to optimal conditions in comparison with competitive heat exchangers according to the current state of the art. The same applies to the slat thickness for claim 18.
  • Claim 19 results in an additional mechanical solidification in addition to their better soldering to the flat tubes.
  • the heat exchangers according to the invention or manufactured according to the invention find their main fields of application as bulk articles in the applications of claims 24 and 25.
  • other known applications such as, for example, as a cooler or as an evaporator, also come into question.
  • applications in motor vehicle construction are also preferred, without fields of application in other fields of application, possibly also stationary arrangements, being excluded.
  • the invention also relates to Flat tubes for installation in a flat tube heat exchanger according to the invention.
  • the elongated design of the rounded narrow sides of the flat tubes of the flat tube heat exchanger according to the invention results in relatively constant transition contours if the same type of flat tubes are arranged closely next to one another.
  • claims 26 to 29 is based on the object of being able to produce and provide flat tubes for the flat tube heat exchanger according to the invention quickly and easily in a manner suitable for mass production.
  • the flat tubes 12 are with a heat exchange ribbing in the form of zigzag fins 16, or the sandwich-like installation type flat tube - lamella - flat tube - lamella - etc. with such zigzag fins equivalent to other fins, which are soldered to the flat sides 14 of the flat tubes 12 adjacent edges 18 to the flat sides 14 of the flat tubes 12.
  • the scope of the respective collector 4 is composed of two components 20 and 22, of which the component 20 forms the tube sheet.
  • the tube sheet 20 has the slots 8 for receiving the flat tube ends 10 inserted therein, of which only one can be seen in the cross section according to FIG. 6.
  • the second component 22, together with the first component 20, complements the scope of the collector 4.
  • Separate caps are usually attached to the collector 4 at the end; however, these caps could also be integrally formed on one of the components 20 or 22. Separate caps are, however, sensible to provide if the second component 22 is preferably an extruded profile.
  • the first component 20 is expediently hard-solder coated on both sides.
  • the second component 22 is expediently free of solder.
  • Both components 20 and 22 overlap in two connection zones 24 extending along the collector 4 in three layers, a hard solder connection using the hard solder coating of the first component 20 in particular being present in the overlap zone.
  • One collector 4 is provided with at least one partition 52 and on one side of the partition with an inlet 54 and on the other side of the partition with an outlet 56 for an internal heat exchange medium. If the other collector is then designed without such a partition, the internal heat exchange medium flows from the inlet 54 through the connected part of the collector and the connected flat tubes 12 to the opposite collector and then through the other flat tubes 12 back into the other section of the former collector and out of the outlet 56.
  • the second collector can be dispensed with entirely and, if necessary, replaced by hairpin bypasses.
  • the profile has a profile length L.
  • the profile is a mirror image of the imaginary longitudinal center plane BB, on the two sides of which parallel profile walls 40 extend, which form the two mutually parallel flat sides 14 on the outside.
  • the parallel walls 40 are stiffened with respect to one another by intermediate webs 42 which are perpendicular to them, with four equidistant intermediate webs being provided here without restricting the generality.
  • the parallel walls 40 continue in rounded walls 44, which end in an apex 46 of the profile and together result in narrow sides 50 of the profile.
  • the longitudinal extent of one of these rounded narrow sides in the direction of dimension L here has dimension 1 in each case. In the exemplary embodiment in FIG. 3, the rounded narrow sides 50 adjoin the outermost intermediate web 42.
  • the fins 16 are not only soldered to the flat sides 14 of the flat tubes 12, but also to the areas 58 of the rounded narrow sides, specifically in the construction of two circular arcs r1 and 1 chosen in FIG r2 along the entire length of the two arcs with radius r2.
  • the lamella 16 is provided with a corrugation 64 which projects on both sides with respect to the otherwise essentially flat lamella plane and stiffens the lamella region which projects freely from the flat tubes.
  • This area is relatively small anyway, since according to FIG. 3 the lamella is close to its apex 46, i.e. is soldered in the area of the entire arc with radius r2.
  • the possibility of retracting the ends 10 of the flat tubes is based on the selected shape of the rounded narrow sides 50 of the flat tube profiles. If these are compressed in the longitudinal direction of their profile cross section according to FIG. 7b or FIG. 7c - which is practically usable only because of the relatively elongated shape of the rounded narrow sides 50 of the profiles - the tube ends 10 are given a reduced effective length, which is an insertion in the slots 8 allows.
  • FIG. 7b and 7c illustrate two preferred options for this longitudinal compression of the profiles.
  • the deformation takes place with tube compression on the rounded narrow sides 50 in the longitudinal direction of the flat tube profiles while maintaining the length of the neutral fiber 68 (shown in broken lines).
  • the deformation takes place with tube compression on the rounded narrow sides 50 in the longitudinal direction of the flat tube profiles with simultaneous compression of the material wall thickness, so that the neutral fiber shown in broken lines is shortened.
  • a material accumulation can be seen, in particular in the corner areas of the end faces of the compressed profile, as is indicated, for example, at a corner by reference number 70. This type of compression can go so far that a central fold 72 forms in the apex area of the compressed rounded section 50.
  • the narrow side of the flat tube is also critical in terms of the quality of the soldering outdoors.
  • the transition region 66 into the drawn-in end 10 forms a relatively acute angle with the tube sheet 20, which is particularly suitable for solder absorption.
  • the transition region 66 can also serve as a tolerance-compensating stop for a form-fitting insertion of the pipe ends 10 into the slots 8 of the collector 4.
  • a plurality of flat tubes 12, for example during extrusion, are initially arranged next to one another in a plane and linked to one another at the apexes 46 of their rounded narrow sides 50 by a material bridge 80, of which only the one in FIG. 8 after separation by cutting through the Remaining bridge remains are shown.
  • the respective material bridge 80 has a low material thickness and a short length in the plane of extension of the flat tubes 12. The dimensions are chosen apart from the desired function of the interlinked arrangement of the flat tubes 12 so that the entire interlinked arrangement can be produced as an integral extruded profile of indefinite length . This applies in particular to the minimum dimensions of the material bridges 80.
  • the longitudinal extent 1 of the respective rounded narrow side 50 of the respective flat tube 12 and the distance d between the flat sides 14 of the respective flat tube 12 also correspond to the information given in the description of the flat tube heat exchanger according to the invention.
  • the direction of extension of the material bridges 80 is to be understood analogously in the direction of the longitudinal extension 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP92109870A 1991-06-20 1992-06-11 Echangeur de chaleur à tubes plats, procédé pour sa fabrication, applications et tubes plats pour échangeur de chaleur Expired - Lifetime EP0519334B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4120442A DE4120442A1 (de) 1991-06-20 1991-06-20 Flachrohrwaermetauscher, herstellungsverfahren desselben und anwendungen
DE4120442 1991-06-20
DE4201791A DE4201791A1 (de) 1991-06-20 1992-01-23 Flachrohre zum einbau in einen flachrohrwaermetauscher und verfahren zum vereinzeln der flachrohre
DE4201791 1992-01-23

Publications (3)

Publication Number Publication Date
EP0519334A2 true EP0519334A2 (fr) 1992-12-23
EP0519334A3 EP0519334A3 (en) 1993-04-21
EP0519334B1 EP0519334B1 (fr) 1995-10-18

Family

ID=25904734

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92109870A Expired - Lifetime EP0519334B1 (fr) 1991-06-20 1992-06-11 Echangeur de chaleur à tubes plats, procédé pour sa fabrication, applications et tubes plats pour échangeur de chaleur

Country Status (4)

Country Link
US (1) US5251692A (fr)
EP (1) EP0519334B1 (fr)
DE (2) DE4201791A1 (fr)
ES (1) ES2078590T3 (fr)

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DE19729496A1 (de) * 1997-07-10 1999-01-14 Behr Gmbh & Co Flachrohr-Wärmeübertrager in Serpentinenbauweise
EP0881448A3 (fr) * 1997-05-30 1999-11-24 Showa Aluminum Corporation Tube plat à passages multiples pour échangeur de chaleur et échangeur de chaleur utilisant de tels tubes
WO2000045102A1 (fr) * 1999-01-28 2000-08-03 Norsk Hydro Asa Tube ovale plat
EP3091323A4 (fr) * 2013-12-21 2017-11-15 Kyocera Corporation Élément d'échangeur de chaleur, et échangeur de chaleur
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WO2020134491A1 (fr) * 2018-12-26 2020-07-02 浙江盾安人工环境股份有限公司 Tube plat et échangeur de chaleur
FR3157922A1 (fr) * 2023-12-27 2025-07-04 Valeo Systemes Thermiques Echangeur de chaleur, notamment pour véhicule automobile, tube pour un tel échangeur et procédé de fabrication d’un tel tube

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JP6194700B2 (ja) * 2013-08-30 2017-09-13 富士通株式会社 放熱器および放熱器の製造方法
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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0881448A3 (fr) * 1997-05-30 1999-11-24 Showa Aluminum Corporation Tube plat à passages multiples pour échangeur de chaleur et échangeur de chaleur utilisant de tels tubes
US6289981B1 (en) 1997-05-30 2001-09-18 Showa Denko K.K. Multi-bored flat tube for use in a heat exchanger and heat exchanger including said tubes
CZ298149B6 (cs) * 1997-05-30 2007-07-04 Showa Denko K.K. Víceotvorová plochá trubice pouzitelná v tepelnémvýmeníku a tepelný výmeník obsahující mnozství víceotvorových plochých trubic
DE19729496A1 (de) * 1997-07-10 1999-01-14 Behr Gmbh & Co Flachrohr-Wärmeübertrager in Serpentinenbauweise
WO2000045102A1 (fr) * 1999-01-28 2000-08-03 Norsk Hydro Asa Tube ovale plat
EP3091323A4 (fr) * 2013-12-21 2017-11-15 Kyocera Corporation Élément d'échangeur de chaleur, et échangeur de chaleur
US10697707B2 (en) 2013-12-21 2020-06-30 Kyocera Corporation Heat exchange member and heat exchanger
EP3553446A1 (fr) * 2018-03-23 2019-10-16 United Technologies Corporation Bord d'attaque profilé d'échangeur de chaleur à ailettes et plaque coulée
WO2020134491A1 (fr) * 2018-12-26 2020-07-02 浙江盾安人工环境股份有限公司 Tube plat et échangeur de chaleur
US12140379B2 (en) 2018-12-26 2024-11-12 Zhejiang Dunan Artificial Environment Co., Ltd. Flat tube and heat exchanger
FR3157922A1 (fr) * 2023-12-27 2025-07-04 Valeo Systemes Thermiques Echangeur de chaleur, notamment pour véhicule automobile, tube pour un tel échangeur et procédé de fabrication d’un tel tube

Also Published As

Publication number Publication date
EP0519334A3 (en) 1993-04-21
US5251692A (en) 1993-10-12
ES2078590T3 (es) 1995-12-16
DE59204039D1 (de) 1995-11-23
DE4201791A1 (de) 1993-07-29
EP0519334B1 (fr) 1995-10-18

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