EP0547309B1 - Ailette ondulée pour un échangeur de chaleur à tubes plats - Google Patents

Ailette ondulée pour un échangeur de chaleur à tubes plats Download PDF

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Publication number
EP0547309B1
EP0547309B1 EP92116971A EP92116971A EP0547309B1 EP 0547309 B1 EP0547309 B1 EP 0547309B1 EP 92116971 A EP92116971 A EP 92116971A EP 92116971 A EP92116971 A EP 92116971A EP 0547309 B1 EP0547309 B1 EP 0547309B1
Authority
EP
European Patent Office
Prior art keywords
corrugated rib
rib
fins
corrugated
creased
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.)
Revoked
Application number
EP92116971A
Other languages
German (de)
English (en)
Other versions
EP0547309A1 (fr
Inventor
Josef Kreutzer
Kurt Mauch
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 Behr GmbH and Co KG
Original Assignee
Behr GmbH and Co KG
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 Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Publication of EP0547309A1 publication Critical patent/EP0547309A1/fr
Application granted granted Critical
Publication of EP0547309B1 publication Critical patent/EP0547309B1/fr
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
    • 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 invention relates to a corrugated fin for a flat tube heat exchanger according to the preamble of claim 1.
  • Such corrugated fins are known, e.g. by US-A-4,693,307.
  • corrugated fins are arranged between the flat tubes of the radiator and soldered to the flat tubes.
  • these corrugated fins also have a supporting function in such a way that they prevent the flat tubes from bulging when they are subjected to internal pressure. Since the corrugated fins should be made as thin as possible with a view to a high heat transfer performance and a low weight, there is a risk that these corrugated fins will buckle under the pressure of the flat tubes, which tend to "inflate”. This problem was also described in the unpublished DE-A 40 31 577 and solved there with other means, namely so-called support means between the flat tubes in the area of the tube sheets.
  • a corrugated fin for a flat tube heat exchanger in which a so-called strengthening beam 42 is provided in the gill area, which is identified by A in FIGS. 8, 9 and 10, i.e. a type of stiffening rib to which it is attached Connect the gills directly on both sides.
  • This rib 42 is roof-shaped, it essentially represents a double gill with opposite legs - the stiffening effect is relatively slight due to the simple bending.
  • This object is solved by the characterizing features of claim 1, i.e. by arranging a stiffening bead that runs transversely to the long sides of the flat tubes in a gill-free area.
  • This stiffening bead achieves a significant stiffening of the corrugated fin and thus prevents the flat tube from bulging when subjected to internal pressure and thus causing the corrugated fin to buckle. Due to the favorable arrangement and design of this stiffening bead, there has been no increase in the pressure drop in the direction of ventilation flow and thus no loss of performance; the weight and thickness of the rib were not changed.
  • the shape or shape of the bead alone resulted in an increase in strength, i.e. an increase in kink resistance in such a way that the flat tubes could be subjected to a higher internal pressure than was possible without such a stiffening bead.
  • the stiffening bead is roof-shaped, it extends over the entire width of the corrugated fin, that is to say transversely to the air flow direction, and is arranged in the central region of the fin depth, that is to say seen in the air flow direction, where it has the greatest effect, since there the greatest stress occurs due to the bulging of the flat tubes.
  • a corrugated fin 1 is shown, which is located between dashed flat tubes 2 of a heat exchanger, not shown, which is preferably the water / air cooler for a motor vehicle driven by an internal combustion engine.
  • the flat tubes 2 are flowed through by coolant, which can be under a pressure of several bars during operation.
  • the corrugated fin 1 is acted upon by ambient air and thus dissipates the heat of the coolant to the environment.
  • the corrugated fin 1 is soldered in a manner not shown to the outer wall of the flat tubes 2 in order to ensure an improved heat transfer.
  • the corrugated fin itself is approximately zigzag or accordion-like and has on the one hand plane areas 3 and rounded areas 4 arranged at an angle to one another, on which the corrugated fin is soldered to the flat tubes 2.
  • plane areas 3 and rounded areas 4 arranged at an angle to one another, on which the corrugated fin is soldered to the flat tubes 2.
  • gills 5 are arranged, which are known per se and which serve to improve the heat transfer to the ambient air.
  • FIG. 2 the arrangement of the corrugated fin 1 between the flat tubes 2 is shown schematically in another view, namely in the direction of the tube axes.
  • the two cutting planes CC and DD are also drawn in there. Accordingly, Fig. 1 is a section in the plane DD.
  • Fig. 3 shows a section in the plane CC through the corrugated fin 1, wherein it can be seen that the corrugated fin has a plurality of gills 5 seen in the direction of air flow, the gills 5 'of the first rib half having a gill angle ⁇ and the ribs 5''of the second rib half also have a gill angle ⁇ , which is opposite to the angle ⁇ , but the same amount.
  • the angle ⁇ is the supplementary angle to 180 °.
  • a reinforcing bead 6 is provided according to the invention, which is shown in more detail in FIG. 5 and is described in more detail below.
  • the corrugated fin is turned over, as shown in detail Z, ie in FIG. 4 .
  • This envelope or hem of the corrugated rib on its two edges also achieves a certain climbing effect and stabilization of the edge.
  • FIG. 5 shows the actual invention, ie the stiffening bead 6 in more detail, only the detail X from FIG. 3 with an adjacent gill 5 ′ and 5 ′′ being shown here.
  • the air flow therefore takes place in the direction of the arrow in the drawing from left to right, but it can equally well take place from right to left, since the corrugated fin is constructed symmetrically with respect to the central axis.
  • This is shown by the gill angles ⁇ , which are opposite but the same amount, the angle ⁇ being approximately in the range of 30 °.
  • the angle ⁇ is the supplementary angle to 180 °.
  • the stiffening bead 6 which in turn is roof-shaped, ie two roof-shaped has mutually inclined surfaces 7 and 8 which enclose an angle ⁇ which can be in the range of approximately 180 ° -2 ⁇ .
  • this roof-shaped design practically causes no increase in pressure loss in the air flow direction.
  • the "ridge" of the roof-shaped stiffening bead 6 rises only insignificantly, ie with the amount h above the plane of the rib surface.
  • the thickness of the rib is marked with s and is approximately 0.1 mm, the rib preferably being made from an aluminum alloy.
  • the height h is approximately 1 to 2.5 times the rib thickness s.
  • the stiffening bead 6 is produced by a simple embossing process during the manufacture of the rib as it passes through the fin rollers and thus requires no special effort.
  • the mode of operation of the stiffening bead becomes particularly clear when one takes a look at FIG. 2, where the stiffening bead is located in the area of the sectional plane D-D. If, due to the application of internal pressure, the flat tubes tend to inflate in the central region, the stiffening bead 6 opposes this deformation process with increased resistance in this region, so that inflation of the tubes and a related buckling of the corrugated fin are avoided. With this simple measure, which has practically no disadvantages, the supporting effect of the corrugated fin can be increased and thus the buckling of the corrugated fin can be relocated to a region of higher internal pressures in the flat tubes.

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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. Ailette ondulée placée entre les tubes plats (2) d'un échangeur de chaleur, brasée à ces tubes et exposée à l'air, l'ailette possédant des ouïes (5) disposées transversalement à la direction d'écoulement de l'air, caractérisée en ce qu'au moins une moulure raidisseuse (6) est formée entre les ouïes (5) et transversalement à la direction d'écoulement de l'air dans l'ailette ondulée (1).
  2. Ailette ondulée selon la revendication 1, caractérisée en ce qu'une moulure raidisseuse (6) est prévue à peu près au milieu de la profondeur d'ailette (vue dans la direction d'écoulement de l'air).
  3. Ailette ondulée selon la revendication 1 ou 2, caractérisée en ce que la moulure raidisseuse (6) est réalisée par repoussage en forme de dièdre et s'étend approximativement sur toute la largeur (3) de la partie d'ailette ondulée s'étendant entre les tubes plats (2) voisins.
  4. Ailette ondulée selon une des revendications 1 à 3, possédant des angles d'ouïes opposés, les ouïes (5) de la première moitié de la profondeur d'ailette présentant un angle d'ouï α et les ouïes de la seconde moitié présentant un angle d'ouï β = 180° - α, avec prévision d'une zone exempte d'ouïes dans la partie centrale de l'ailette ondulée (1), caractérisée en ce que la moulure raidisseuse (6) est disposée dans la zone exempte d'ouïes et pourvue en section droite d'une forme angulaire renfermant un angle τ ≈ 180° - 2α.
  5. Ailette ondulée selon la revendication 4, caractérisée en ce que la hauteur (h) de la moulure raidisseuse (6) correspond à peu près à l'épaisseur (s) de la tôle formant l'ailette ondulée (1), les relations dimensionnelles correspondant approximativement à: s < h < 2,5 s.
EP92116971A 1991-12-19 1992-10-05 Ailette ondulée pour un échangeur de chaleur à tubes plats Revoked EP0547309B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4142019 1991-12-19
DE4142019A DE4142019A1 (de) 1991-12-19 1991-12-19 Wellrippe fuer flachrohrwaermetauscher

Publications (2)

Publication Number Publication Date
EP0547309A1 EP0547309A1 (fr) 1993-06-23
EP0547309B1 true EP0547309B1 (fr) 1996-05-29

Family

ID=6447526

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92116971A Revoked EP0547309B1 (fr) 1991-12-19 1992-10-05 Ailette ondulée pour un échangeur de chaleur à tubes plats

Country Status (3)

Country Link
US (1) US5361829A (fr)
EP (1) EP0547309B1 (fr)
DE (2) DE4142019A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10343905A1 (de) * 2003-09-19 2005-06-09 Behr Gmbh & Co. Kg Gelötetes Wärmeübertragernetz
DE102004001306A1 (de) * 2004-01-07 2005-08-04 Behr Gmbh & Co. Kg Wärmeübertrager
CN107704645A (zh) * 2016-08-09 2018-02-16 林德股份公司 测定管束式热交换器的强度的方法及其制造方法

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2180050A1 (fr) * 1996-04-04 1997-10-05 Matthew K. Harris Ailettes encochees pour echangeur de chaleur d'automobile
DE19719262C2 (de) * 1997-05-07 2003-01-30 Valeo Klimatech Gmbh & Co Kg Zickzacklamelle als Verrippung von Flachrohrwärmetauschern bei Kraftfahrzeugen
US5787972A (en) * 1997-08-22 1998-08-04 General Motors Corporation Compression tolerant louvered heat exchanger fin
ES2154499T3 (es) 1999-02-13 2001-04-01 Nl Radiateuren Fabriek B V Aleta para intercambiador de calor.
US6729388B2 (en) * 2000-01-28 2004-05-04 Behr Gmbh & Co. Charge air cooler, especially for motor vehicles
FR2824895B1 (fr) * 2001-05-18 2005-12-16 Air Liquide Ailette ondulee a persiennes pour echangeur de chaleur a plaques, et echangeur a plaques muni de telles ailettes
US6702190B1 (en) 2001-07-02 2004-03-09 Arvin Technologies, Inc. Heat transfer system for a vehicle
DE10235038A1 (de) * 2002-07-31 2004-02-12 Behr Gmbh & Co. Flachrohr-Wärmeübertrager
US20050045314A1 (en) * 2004-08-26 2005-03-03 Valeo, Inc. Aluminum heat exchanger and method of making thereof
DE102004012427A1 (de) * 2004-03-13 2005-09-29 Modine Manufacturing Co., Racine Wärmetauschernetz und Wellrippe
FR2868521B1 (fr) * 2004-03-30 2009-03-13 Valeo Thermique Moteur Sas Ailettes pour echangeur de chaleur comportant des lamelles decoupees formant deflecteur de flux
DE102004060795A1 (de) * 2004-12-17 2006-06-29 Modine Manufacturing Co., Racine Wärmetauschrippe und Wärmetauscher
US20070039723A1 (en) * 2005-08-18 2007-02-22 Alex Latcau Header extension to retain core cover and maintain constant compression on outer fins
US20070246202A1 (en) * 2006-04-25 2007-10-25 Yu Wen F Louvered fin for heat exchanger
US7866042B2 (en) * 2007-01-12 2011-01-11 Centrum Equities Acquisition, Llc Method for producing a split louver heat exchanger fin
US8408283B2 (en) * 2007-06-28 2013-04-02 Centrum Equities Acquisition, Llc Heat exchanger fin with ribbed hem
WO2008085279A1 (fr) 2007-01-12 2008-07-17 Proliance International, Inc. Ailette d'échangeur de chaleur
FR2923002B1 (fr) * 2007-10-31 2015-12-11 Valeo Systemes Thermiques Tube pour echangeur thermique
DE202009014599U1 (de) 2009-10-29 2010-02-18 Behr Gmbh & Co. Kg Wärmeübertrager
EP3015297B2 (fr) * 2014-10-29 2022-09-14 Carl Freudenberg KG Système doté d'un élément de filtre
JP2018132247A (ja) * 2017-02-15 2018-08-23 富士電機株式会社 自動販売機

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1868830U (de) * 1962-11-29 1963-03-14 Georg Plange Fa Heizelement fuer sockelkonvektoren.
US3250325A (en) * 1963-02-19 1966-05-10 Ford Motor Co Heat exchange device
US3265127A (en) * 1963-10-21 1966-08-09 Ford Motor Co Heat exchange element
US3298432A (en) * 1964-05-22 1967-01-17 Przyborowski Stanislaus Radiators
US3993125A (en) * 1975-11-28 1976-11-23 Ford Motor Company Heat exchange device
US4535839A (en) * 1982-12-20 1985-08-20 General Motors Corporation Heat exchanger with convoluted air center strip
US4693307A (en) * 1985-09-16 1987-09-15 General Motors Corporation Tube and fin heat exchanger with hybrid heat transfer fin arrangement
DE4031577A1 (de) * 1990-10-05 1992-04-09 Behr Gmbh & Co Waermetauscher

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10343905A1 (de) * 2003-09-19 2005-06-09 Behr Gmbh & Co. Kg Gelötetes Wärmeübertragernetz
DE102004001306A1 (de) * 2004-01-07 2005-08-04 Behr Gmbh & Co. Kg Wärmeübertrager
CN107704645A (zh) * 2016-08-09 2018-02-16 林德股份公司 测定管束式热交换器的强度的方法及其制造方法

Also Published As

Publication number Publication date
EP0547309A1 (fr) 1993-06-23
US5361829A (en) 1994-11-08
DE59206417D1 (de) 1996-07-04
DE4142019A1 (de) 1993-06-24

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