US20190242658A1 - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
US20190242658A1
US20190242658A1 US15/748,642 US201615748642A US2019242658A1 US 20190242658 A1 US20190242658 A1 US 20190242658A1 US 201615748642 A US201615748642 A US 201615748642A US 2019242658 A1 US2019242658 A1 US 2019242658A1
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US
United States
Prior art keywords
segment
corrugation
curved
tubes
heat exchanger
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.)
Abandoned
Application number
US15/748,642
Other languages
English (en)
Inventor
Thomas SCHIEHLEN
Holger Schroth
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.)
Mahle International GmbH
Original Assignee
Mahle International 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
Application filed by Mahle International GmbH filed Critical Mahle International GmbH
Publication of US20190242658A1 publication Critical patent/US20190242658A1/en
Abandoned 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
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/126—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element consisting of zig-zag shaped fins
    • F28F1/128—Fins with openings, e.g. louvered fins
    • 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
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/126—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element consisting of zig-zag shaped fins
    • 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
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
    • F28F1/325—Fins with openings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2215/00—Fins
    • F28F2215/02—Arrangements of fins common to different heat exchange sections, the fins being in contact with different heat exchange media
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2215/00—Fins
    • F28F2215/04—Assemblies of fins having different features, e.g. with different fin densities
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2215/00—Fins
    • F28F2215/08—Fins with openings, e.g. louvers

Definitions

  • the present invention relates to a heat exchanger comprising tubes and corrugated fins arranged therebetween, which corrugated fins have straight flanks and have corrugation peaks and corrugation troughs each having a curve.
  • a heat exchanger network and a heat exchanger equipped therewith is known, wherein the heat exchanger network has a plurality of flat tubes, and plates, arranged between the flat tubes, in heat-conducting contact therewith, and wherein the heat-conducting contact is produced solely through reciprocal bracing of the flat tubes and plates.
  • the plates are elastically deformable here in the direction of the bracing, whereby an installation effort is to be reduced.
  • corrugated fins are inserted between individual tubes of such heat exchangers in a known manner, which corrugated fins are usually soldered to the tubes for improved heat transfer.
  • a soldering a bonded connection is known for fixing the corrugated fins to the tubes, wherein hitherto the adhesives used for this were loaded for example with heat-conducting particles of boron nitride or aluminium, in order to be able to improve the thermal conductivity of the adhesive.
  • heat-conducting particles have a disadvantageous influence on the price of the adhesive and its processing.
  • glue in a soldered network, wherein for this, however, two production methods must be combined, which likewise has a negative influence on the costs.
  • solder structures known from the prior art are designed to compensate for manufacturing tolerances which occur during assembly, via the tube geometry.
  • this is not possible in a purely bonded heat exchanger and, for example with an extruded tube geometry.
  • corrugated fins are used, which can undertake such a compensation function.
  • the present invention is concerned with the problem of indicating for a heat exchanger of the generic type an improved or at least an alternative embodiment, which in particular overcomes the disadvantages known from the prior art.
  • the present invention is based on the general idea of being able, on the one hand, of creating a heat exchanger which can be bonded, and on the other hand, however, of equipping it at a comparatively favourable cost and with corresponding tolerance compensation possibilities and with a high heat exchanger performance.
  • the heat exchanger according to the invention has here, in a known manner, tubes and corrugated fins, arranged therebetween, with straight flanks and corrugation troughs and corrugation peaks having respectively a curve.
  • the curve of a corrugation peak can be configured here alternatively in two embodiments according to the invention.
  • the corrugation peaks are optimized to the effect that a minimum abutment is enforced by a spring effect, whereby an improved heat transmission capability and thereby a minimum system performance can be guaranteed.
  • the shape of the corrugation peak of such a corrugated fin according to the invention is based here in bionic form on the shape of a human foot.
  • a pressure-stable fin or respectively flank of the corrugated fin is produced, which prevents a buckling under the application of pressure.
  • the first alternative embodiment of a curve of a corrugation peak has a curved first segment and a linear second segment, wherein the second segment is twice as long as the first segment and wherein the two segments have an opposite slope of between 0.1 to 0.5%.
  • the curved first segment has a positive slope of +0.1 to +0.5%, whilst the linear second segment has a negative slope of ⁇ 0.1 to ⁇ 0.5%.
  • the slope of the curved first segment is determined here between its start and end point.
  • the latter likewise has a curved first and a curved second segment which, however, in this case are equally long, wherein the first segment again continues via a maximum point into the second segment and wherein in the case of unloaded corrugated fins, a tolerance distance a remains between two adjacent corrugation peaks, which is dimensioned in such a way that it is pressed to zero in the state of installation in the heat exchanger, and thereby the corrugation peaks lie in contact with each other.
  • the two segments are arranged here in mirror image to one another, in so far as the mirror axis runs through the maximum point.
  • the horizontal tolerance distance a between two corrugation peaks or respectively between two corrugation troughs can therefore determine in a preset manner a possible vertical spring travel, because after exploiting this spring travel, two adjacent corrugation peaks or two corrugation troughs contact one another and thereby an extremely stable arch construction results.
  • a buckling of the individual flanks or respectively corrugated fins is prevented, and on the other hand a sufficient pressure-stable surface is created, in order to displace excess adhesive out from the gap between the corrugation peak or respectively the corrugation trough and the tube. This is important in particular for an optimum thermal transfer.
  • the remaining adhesive layer is thereby reduced to a minimum with, at the same time, the guarantee of a freedom from bubbles.
  • an opposite slope of the first and of the second segment is approximately 0.3-0.4%.
  • a comparatively flat corrugation peak or respectively a comparatively flat corrugation trough can be created, which on the one hand enables a flat and thereby good heat-transferring connection to the tube, and on the other hand enables the desired tolerance compensation.
  • an adhesive layer is applied on an outer side of the tubes, in particular by laminating:
  • the adhesive layer can thereby be applied in particular in the manner of an adhesive foil or an adhesive film, whereby the applying of the adhesive layer is not only economical, but in addition also of extremely high quality.
  • the corrugated fins are formed from a material having good thermal conductivity, preferably aluminium, copper etc.
  • a material combination can also be considered, because the adhesive layer has an insulating effect and thereby a contact corrosion is prevented.
  • the heat exchanger is configured as an evaporator, as an engine cooler, as a condenser, as a charge air cooler, as a chiller, as an oil cooler, as a heating body or as a PTC auxiliary heater.
  • evaporator as an engine cooler, as a condenser, as a charge air cooler, as a chiller, as an oil cooler, as a heating body or as a PTC auxiliary heater.
  • FIG. 1 a sectional illustration through a heat exchanger according to the invention with corrugated fins according to a first alternative embodiment
  • FIG. 2 a detail illustration of the corrugated fin according to the first alternative embodiment
  • FIG. 3 an illustration as in FIG. 1 , but with corrugated fins according to a second alternative embodiment
  • FIG. 4 a detail illustration of the corrugated fins according to the second alternative embodiment.
  • a heat exchanger 1 which can be configured for example as an evaporator, as an engine cooler, as a condenser, as a charge air cooler, as a chiller, as an oil cooler, as a heating body or as a PTC auxiliary heater, has tubes 2 and corrugated fins 3 arranged therebetween, with straight flanks 4 and corrugation troughs 6 and corrugation peaks 7 respectively having a curve 5 (cf. also FIGS. 2 and 4 ).
  • the corrugated fins 3 are bonded to the tubes 2 here via an adhesive layer 8 .
  • the curve 5 of a corrugation peak 6 is configured in accordance with the invention according to two alternative embodiments:
  • the latter has a curved first segment 9 and a linear second segment 10 , wherein the linear second segment 10 is twice as long as the first segment 9 .
  • the length specified for this refers here to an extent along a centre axis 12 .
  • the curved first segment 9 has here a slope of 0.1-0.5%, preferably between +0.3 and +0.4%, whilst the linear second segment 10 has an opposite slope hereto of ⁇ 0.1 to ⁇ 0.5%, preferably of ⁇ 0.3 to ⁇ 0.4%.
  • the height of the curve 5 up to the transition into the respective flanks 4 is designated here according to FIGS. 2 and 4 by m.
  • its curve 5 of a corrugation peak 6 (cf. FIG. 4 ) has a curved first segment 9 and a second segment 10 curved in the same direction, which have the same length L (along the centre axis 12 ) and accordingly are configured to be of equal length.
  • a tolerance distance a remains between two adjacent corrugation peaks 4 , which tolerance distance is dimensioned in such a way that it goes to zero in the state of installation in the heat exchanger 1 and thereby the corrugation peaks 6 lie in contact with each other.
  • corrugation peaks 6 and the corrugation troughs 7 can be seen merely in a mirroring with respect to the centre axis 12 , so that the corrugation peaks 6 correspond to the corrugation troughs 7 .
  • the adhesive layer 8 is applied here on the outer side of the tubes 2 , for example by laminating, whereby such an adhesive layer 8 , for example in the manner of an adhesive film or an adhesive foil, can be applied not only at a favourable cost, but also with a small layer thickness and in a reliable manner.
  • the individual corrugated fins 3 are bonded here to the respectively adjacent tubes, wherein the corrugated fins 3 preferably lie flat against the tubes 2 in the region of their corrugation peaks 6 and of their corrugation troughs 7 , and thereby enable a good thermal transfer.
  • the corrugated fins 3 according to the invention are formed here preferably from aluminium and thereby from a material having good thermal conductivity. Purely theoretically, by a bonding of the corrugated fins 3 to the tubes 2 a combination of different materials is also conceivable, so that the corrugated fins 3 can be formed from a different material to the tubes 2 , without the risk of a contact corrosion existing.
  • corrugated fins 3 illustrated according to FIG. 2 can of course also be configured symmetrically here and not asymmetrically as in the illustrated example.
  • the spring effect which is able to be achieved with the corrugated fin 3 according to the invention therefore allows manufacturing tolerances to be compensated comparatively simply, even in the case of small layer thicknesses.
  • a particularly stable system can be created, in which an undesired buckling of the flanks 4 can be reliably prevented.
  • considerable cost advantages can be achieved, in particular as regards the resources which are used and as regards the energy which is used, in particular with regard to a soldering process, whereby a CO 2 balance can be distinctly improved.
  • Such a heat exchanger 1 can be used for example in an internal combustion engine 11 .

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US15/748,642 2015-08-06 2016-08-02 Heat exchanger Abandoned US20190242658A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102015215053.4A DE102015215053A1 (de) 2015-08-06 2015-08-06 Wärmeübertrager
DEDE102015215053.4 2015-08-06
PCT/EP2016/068452 WO2017021416A1 (de) 2015-08-06 2016-08-02 Wärmeübertrager

Publications (1)

Publication Number Publication Date
US20190242658A1 true US20190242658A1 (en) 2019-08-08

Family

ID=56561372

Family Applications (1)

Application Number Title Priority Date Filing Date
US15/748,642 Abandoned US20190242658A1 (en) 2015-08-06 2016-08-02 Heat exchanger

Country Status (5)

Country Link
US (1) US20190242658A1 (de)
EP (1) EP3332206B1 (de)
CN (1) CN107850402A (de)
DE (1) DE102015215053A1 (de)
WO (1) WO2017021416A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190104643A1 (en) * 2017-09-29 2019-04-04 Intel Corporation Crushable heat sink for electronic devices

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3540354A1 (de) * 2018-03-15 2019-09-18 Mahle International GmbH Wellrippenverbundmaterial für einen wärmetauscher
DE102020212488A1 (de) 2020-10-02 2022-04-07 Mahle International Gmbh Verfahren und Anordnung

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3673846A (en) * 1969-05-09 1972-07-04 Ass Eng Ltd Heat exchangers
US4067219A (en) * 1977-03-23 1978-01-10 Bernard J. Wallis Heat exchanger fin roll
US4645000A (en) * 1986-04-21 1987-02-24 General Motors Corporation Tube and fin heat exchanger
US5679106A (en) * 1994-12-26 1997-10-21 Nippondenso Co., Ltd. Roller for forming corrugated fin
US6095236A (en) * 1997-08-19 2000-08-01 Grueter Elektroapparate Ag Heat exchanger, in particular for a heating and cooling configuration of an extruder barrel
US20030141046A1 (en) * 2002-01-15 2003-07-31 Toru Ikeda Heat exchanger
US20090053549A1 (en) * 2007-08-20 2009-02-26 Denso Corporation Aluminum alloy fin material for brazing
US20100243224A1 (en) * 2009-03-25 2010-09-30 Jiang Jianlong Fin for heat exchanger and heat exchanger using the fin
US20100258286A1 (en) * 2009-04-13 2010-10-14 Gao Yuan Fin, heat exchanger and heat exchanger assembly
DE102013206056A1 (de) * 2013-03-18 2014-09-18 Behr Gmbh & Co. Kg Verfahren zur Herstellung von verbundenen Wärmeübertragerelementen

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60027990T2 (de) * 1999-11-26 2006-09-21 Calsonic Kansei Corp. Verfahren zur Herstellung einer Wellrippe
DE20118511U1 (de) 2000-11-01 2002-02-14 Autokuehler Gmbh & Co Kg Wärmeaustauschernetz und damit hergestellter Wärmeaustauscher
DE10228697C5 (de) * 2002-06-27 2007-05-16 Gea Energietechnik Gmbh Wärmeübertrager
JP2005061648A (ja) * 2003-08-18 2005-03-10 Zexel Valeo Climate Control Corp 熱交換器
DE102006035209A1 (de) 2006-07-29 2008-01-31 Modine Manufacturing Co., Racine Wellrippe und Wärmetauscher
CN101691975B (zh) * 2009-09-03 2011-06-29 三花丹佛斯（杭州）微通道换热器有限公司 用于热交换器的翅片以及具有该翅片的热交换器
DE102013226542A1 (de) * 2013-12-18 2015-06-18 MAHLE Behr GmbH & Co. KG Heizvorrichtung

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3673846A (en) * 1969-05-09 1972-07-04 Ass Eng Ltd Heat exchangers
US4067219A (en) * 1977-03-23 1978-01-10 Bernard J. Wallis Heat exchanger fin roll
US4645000A (en) * 1986-04-21 1987-02-24 General Motors Corporation Tube and fin heat exchanger
US5679106A (en) * 1994-12-26 1997-10-21 Nippondenso Co., Ltd. Roller for forming corrugated fin
US6095236A (en) * 1997-08-19 2000-08-01 Grueter Elektroapparate Ag Heat exchanger, in particular for a heating and cooling configuration of an extruder barrel
US20030141046A1 (en) * 2002-01-15 2003-07-31 Toru Ikeda Heat exchanger
US20090053549A1 (en) * 2007-08-20 2009-02-26 Denso Corporation Aluminum alloy fin material for brazing
US20100243224A1 (en) * 2009-03-25 2010-09-30 Jiang Jianlong Fin for heat exchanger and heat exchanger using the fin
US20100258286A1 (en) * 2009-04-13 2010-10-14 Gao Yuan Fin, heat exchanger and heat exchanger assembly
DE102013206056A1 (de) * 2013-03-18 2014-09-18 Behr Gmbh & Co. Kg Verfahren zur Herstellung von verbundenen Wärmeübertragerelementen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190104643A1 (en) * 2017-09-29 2019-04-04 Intel Corporation Crushable heat sink for electronic devices
US11032944B2 (en) * 2017-09-29 2021-06-08 Intel Corporation Crushable heat sink for electronic devices

Also Published As

Publication number Publication date
DE102015215053A1 (de) 2017-02-09
WO2017021416A1 (de) 2017-02-09
EP3332206A1 (de) 2018-06-13
CN107850402A (zh) 2018-03-27
EP3332206B1 (de) 2019-04-03

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