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EP2869015B1 - Méthode d'utilisation d'ailettes ondulées asymétriques avec des persiennes - Google Patents

Méthode d'utilisation d'ailettes ondulées asymétriques avec des persiennes Download PDF

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Publication number
EP2869015B1
EP2869015B1 EP13191548.0A EP13191548A EP2869015B1 EP 2869015 B1 EP2869015 B1 EP 2869015B1 EP 13191548 A EP13191548 A EP 13191548A EP 2869015 B1 EP2869015 B1 EP 2869015B1
Authority
EP
European Patent Office
Prior art keywords
edge portion
louvers
trailing edge
fluid flow
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.)
Active
Application number
EP13191548.0A
Other languages
German (de)
English (en)
Other versions
EP2869015A1 (fr
Inventor
Selma Ben Saad
Scott E. Kent
Hervé Damotte
Tomasz Stelmasinski
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
Priority to EP13191548.0A priority Critical patent/EP2869015B1/fr
Publication of EP2869015A1 publication Critical patent/EP2869015A1/fr
Application granted granted Critical
Publication of EP2869015B1 publication Critical patent/EP2869015B1/fr
Active 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
    • 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

Definitions

  • the present invention relates to a method of using a fluid flow guide member of a heat exchanger.
  • Tube and fin heat exchangers typically comprise parallel flat tubes wherein flows the fluid and, corrugated louvered fins arranged between the tubes and across which flows an air stream.
  • the louvered fins are made in a metal strip fanfold creating panels substantially parallel and extending between the tubes from a leading edge with louvers to a trailing edge with inversed louvers. Furthermore, the fins are provided with slit louvers forcing the air stream to deviate and to traverse the panels.
  • the symmetrical fins usually comprise an upstream series of louvers, arranged in the leading half of the strip and, a downstream series of louvers arranged in the trailing half. While the upstream louvers deviate the air flow in one direction, the trailing louvers deviate it in the opposite direction.
  • a fin made from a corrugated metallic strip according to the prior art is known from EP 2 657 637 .
  • the width of the fin extends along a transversal axis from a first edge to a second edge, the first edge portion of the fin being provided with slit louvers adapted to deviate the flow.
  • the second edge portion is provided with protrusions free of slit louvers.
  • the guide member is made from a corrugated metallic strip, the width of which extending along a transversal axis from a leading edge to a trailing edge.
  • the leading edge portion of the guide member is provided with slit louvers adapted to deviate the flow.
  • the trailing edge portion is free of slit louvers and provided with strengthening ribs.
  • the ribs are not slit and are formed by corrugating the trailing edge portion of the strip.
  • the ribs have a trapezoidal cross section.
  • the width of the strip is divided between the leading edge portion and the trailing edge portion along the transversal axis. In an embodiment both portion have equal length while, in another specific embodiment, the leading edge portion is longer than the trailing edge portion. In still another embodiment, the leading edge portion is shorter than the trailing edge portion.
  • the invention is also related to a method of using the fluid flow guide member in a heat exchanger having tubes between which are arranged a plurality of fluid flow guide members.
  • a brazed air-fluid heat exchanger 10 comprises two parallel tanks 12 extending along a normal axis N, a plurality of longitudinal L flat tubes 14 extending between the tanks 12 and corrugated fins 16 arranged between the tubes 14.
  • the fins 16 are made of a metal strip 18 fanfold so to form flat panels 20 substantially parallel to each other's, and only joining along the fold lines 22 brazed to the tubes 14.
  • the heat exchanger 10 has a large front face 24 perpendicular to a transversal axis T.
  • an air flow F crosses the heat exchanger 10 flowing between the fins 16 from the leading edge 26 to a trailing edge 28.
  • the fins 16 have a leading portion 30 followed by a trailing portion 32.
  • the leading portion 30 is provided with slit louvers 34 oriented to deviate and skew the air flow F of the transversal axis T and, the trailing portion 32 is provided with ribs 36 extending between the fold lines 22.
  • a first embodiment is represented on figure 3 where the leading edge 26 is on the left of the figure.
  • the leading portion 30 and the trailing portion 32 have equal transversal length, approximately half the width W of the strip 18.
  • the louvers 34 are represented by a series of parallel skewed lines and the ribs 36, on the trailing portion 32, have trapezoidal profiles.
  • the ribs 36 are not slit and consequently the air flow that enters the trailing portion 32 remains between the same two fins until exiting by the trailing edge 28. While many alternatives can be made, it appears that a good dimensional compromise resides in an inter-louvers distance 38 of approximately 1 mm and in a trapezoidal base width of approximately 3mm for the ribs, each of the three sides of the rib having approximately the same dimension.
  • leading edge portion 30, containing louvers 34 is much wider/longer along the transversal axis T than the trailing portion 32.
  • the ribs do not need to be trapezoidal and other shapes such as square, semi-circular or triangular are also possible.

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  • 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)

Claims (5)

  1. Procédé d'utilisation d'un élément de guidage d'écoulement de fluide (16) d'un échangeur de chaleur (10) qui est traversé par un écoulement de fluide (F) lors du fonctionnement de l'échangeur de chaleur (10), l'élément de guidage (16) étant fait à partir d'une bande métallique ondulée (18) dont la largeur (W) s'étendant le long d'un axe transversal (T) entre un bord d'attaque (26) et un bord de fuite (28), dans lequel l'écoulement de fluide (F) s'écoule du bord d'attaque (26) au bord de fuite (28) lors du fonctionnement de l'échangeur de chaleur (10), dans lequel
    - dans la portion bord d'attaque (30) de l'élément de guidage (16) des déflecteurs à fentes (34) sont prévus, conçus pour dévier l'écoulement (F),
    - la portion bord de fuite (32) est exempte de déflecteurs à fentes,
    - des nervures de renforcement (36) sont agencées dans la portion bord de fuite (32),
    - les nervures (36) sont formées en faisant subir un formage d'ondulations à la portion bord de fuite (32) de la bande (18).
  2. Procédé selon la revendication 1, dans lequel les nervures (36) ont une section transversale trapézoïdale.
  3. Procédé selon les revendications 1 ou 2, dans lequel la portion bord d'attaque (30) et la portion bord de fuite (32) sont de longueur égale.
  4. Procédé selon les revendications 1 à 3, dans lequel la portion bord d'attaque (30) et la portion bord de fuite (32) sont de longueur inégale.
  5. Procédé d'utilisation d'un élément de guidage d'écoulement de fluide (16), selon l'une quelconque des revendications précédentes, dans un échangeur de chaleur (10) comportant des tubes (14) entre lesquels sont agencés une pluralité desdits éléments de guidage de fluide (16).
EP13191548.0A 2013-11-05 2013-11-05 Méthode d'utilisation d'ailettes ondulées asymétriques avec des persiennes Active EP2869015B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13191548.0A EP2869015B1 (fr) 2013-11-05 2013-11-05 Méthode d'utilisation d'ailettes ondulées asymétriques avec des persiennes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13191548.0A EP2869015B1 (fr) 2013-11-05 2013-11-05 Méthode d'utilisation d'ailettes ondulées asymétriques avec des persiennes

Publications (2)

Publication Number Publication Date
EP2869015A1 EP2869015A1 (fr) 2015-05-06
EP2869015B1 true EP2869015B1 (fr) 2017-09-20

Family

ID=49518802

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13191548.0A Active EP2869015B1 (fr) 2013-11-05 2013-11-05 Méthode d'utilisation d'ailettes ondulées asymétriques avec des persiennes

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EP (1) EP2869015B1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3099239B1 (fr) 2019-07-25 2021-10-01 Valeo Systemes Thermiques Echangeur de chaleur notamment pour véhicule automobile et procédé de fabrication d’un tel échangeur de chaleur
FR3099238B1 (fr) 2019-07-25 2021-10-01 Valeo Systemes Thermiques Echangeur de chaleur notamment pour véhicule automobile et procédé de fabrication d’un tel échangeur de chaleur
FR3099240B1 (fr) 2019-07-25 2021-08-06 Valeo Systemes Thermiques Echangeur de chaleur notamment pour véhicule automobile et procédé de fabrication d’un tel échangeur de chaleur
FR3100058B1 (fr) 2019-08-23 2022-03-25 Valeo Systemes Thermiques Echangeur de chaleur notamment pour véhicule automobile et procédé de fabrication d’un tel échangeur de chaleur

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020189799A1 (en) * 2001-06-13 2002-12-19 Tatsuo Ozaki Heat exchanger

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3068761B2 (ja) * 1994-12-21 2000-07-24 シャープ株式会社 熱交換器
JP3942210B2 (ja) * 1996-04-16 2007-07-11 昭和電工株式会社 熱交換器、及びこの熱交換器を用いたルームエアコン並びにカーエアコン
JP2007232246A (ja) * 2006-02-28 2007-09-13 Denso Corp 熱交換器
WO2012098914A1 (fr) * 2011-01-21 2012-07-26 ダイキン工業株式会社 Échangeur de chaleur et climatiseur
KR101451056B1 (ko) * 2011-01-21 2014-10-16 다이킨 고교 가부시키가이샤 열교환기 및 공기 조화기

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020189799A1 (en) * 2001-06-13 2002-12-19 Tatsuo Ozaki Heat exchanger

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