EP0305665B1 - Echangeur de chaleur avec des ailettes à lamelle - Google Patents

Echangeur de chaleur avec des ailettes à lamelle Download PDF

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Publication number
EP0305665B1
EP0305665B1 EP88109600A EP88109600A EP0305665B1 EP 0305665 B1 EP0305665 B1 EP 0305665B1 EP 88109600 A EP88109600 A EP 88109600A EP 88109600 A EP88109600 A EP 88109600A EP 0305665 B1 EP0305665 B1 EP 0305665B1
Authority
EP
European Patent Office
Prior art keywords
lamella
tongues
pipe
fins
collars
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.)
Expired - Lifetime
Application number
EP88109600A
Other languages
German (de)
English (en)
Other versions
EP0305665A1 (fr
Inventor
Wolfgang Hesse
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
Application filed by Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Publication of EP0305665A1 publication Critical patent/EP0305665A1/fr
Application granted granted Critical
Publication of EP0305665B1 publication Critical patent/EP0305665B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F28F1/24—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2240/00—Spacing means

Definitions

  • the invention relates to a heat exchanger with fins according to the preamble of claim 1 and a method for producing the fins for a heat exchanger according to claim 1.
  • a heat exchanger with fin fins is known, in which the fin fins are kept at a distance from one another and parallel to one another by shaped collars, and which are penetrated in passages through the collars by tubes running parallel to one another, each of which Inner diameter of the passage is adapted to the outer diameter of the tube and at least partially abuts the outer circumference of the tube, and tongues are arranged on the solid edge of the passage distributed around the circumference, the free ends of which are angled at an angle to the tube projecting through the passage and spacing contact surfaces for the subsequent Release the fin rib.
  • the bent tongues of the solid collar are up to approximately half the height of the collar cut free into it and the free ends of the tongues are rounded off to the outside, as can be seen in particular from FIG.
  • the deformed lamellar collar lies only with a part of the possible contact surface on the tube, so that there is a reduced heat transfer.
  • the rounded corners of the tongue are only point or at best linear on the neighboring lamella, so that heat is not dissipated from the neighboring lamella via the tongues with only a very small transmission surface and the theoretically possible heat transfer is practically halved by this known lamella design.
  • the rounded, bent tongues cause a strong swirling of the cooling air flowing through, so that an increased flow resistance occurs and an undesirably high pressure drop occurs overall on the cooler. In vehicles, this reduces the drag coefficient Cw of the entire vehicle, which increases fuel consumption, among other things.
  • a heat exchanger with a shaped collar is also known, in which the free ends of the collars are also angled at an angle to the tube projecting through and these angled surfaces are spacing surfaces for the subsequent ones Deliver the lamellar ribs. If fins with higher strength are used in such heat exchangers, cracks occur when the collar is pulled through, since a relatively large material deformation is required there. Cracks in the fins disrupt the heat flow, increase the flow resistance, promote corrosion and thereby reduce the service life of the heat exchanger.
  • Another heat exchanger which has the same disadvantages mentioned above is also known from DE-OS 21 23 722. Furthermore, it is known from GB 2 047 399 to solder free-punched, angled tongues of the fin ribs to the heat exchanger tubes. Due to the few, relatively narrow, angled tongues, the heat flow is still severely hampered.
  • the present invention is based on the object of designing a heat exchanger according to the preamble of claim 1 in such a way that, with increased tube fin strength, a lower air resistance is achieved with good heat transfer.
  • the invention provides the characterizing features of claim 1.
  • the angled tongues lie against the counter lamella and can thus contribute to heat dissipation.
  • there is also another advantage of better heat transfer since here practically heat of the tube projecting through the lamella can be transferred from both lamella sides.
  • the fins are first provided with star-shaped punchings, then the edges of these punchings with their tongues formed by the star shape are pulled through 90 ° by means of pull-through punches, and then the tongues are at least substantially Part of its length is angled outwards to form the spacer contact surfaces, the distance of the spacer contact surfaces from the base plate surface being equalized by a calibration press in all the collars of the plates formed in this way.
  • the lamellar rib material does not have to be deformed very much when pulled through to form the collar, so that harder rib material can also be used, in order to damage the radiator in a robust manner Keep operation and cleaning work as low as possible.
  • the fins 1 produced in this way are then arranged parallel to one another on tubes running parallel to one another to form the heat exchanger.
  • the individual lamella ribs 1 are held at the same distance from one another by the spacer contact surfaces 6, the outer diameter 10 of the tube 9 corresponding to the inner diameter 11 of the collar 8.
  • the punch 2 has six tongues 3, while in the embodiment shown in Figures 7 to 11 for lamellar fins 1 with tubes 9 with a smaller diameter only three tongues 3 are provided for each punch 2.
  • the design according to the embodiment of Figures 1 to 6 is such that a detailed description is unnecessary here.

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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)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)

Claims (2)

  1. Echangeur de chaleur à ailettes à lamelles (1) qui sont maintenues à distance les unes des autres et parallèlement les unes aux autres par des cols (8) réalisés par formage des ailettes à lamelles (1) et dans des soyages (2') des cols (9) desquelles passent des tubes parallèles (9), le diamètre intérieur du soyage (2') étant adapté au diamètre extérieur du tube (9) et étant appliqué au moins partiellement contre la circonférence extérieure du tube (9) et des languettes (3) réparties à la circonférence étant disposées sur le bord soyé du soyage (2'), l'extrémité libre des languettes étant coudée de manière qu'elle inscrive un angle avec le tube (9) passant par le soyage (2') et formant des surfaces d'appui d'entretoisement (6) pour l'ailette suivante à lamelles (1), caractérisé en ce que l'angle que les languettes coudées (3) inscrivent avec le tube (9) est de 90°, la cote extérieure maximale de la découpe (2) à l'emporte-pièce étant inférieure avant le soyage au diamètre extérieur (10) du tube, en ce que le nombre des languettes (3) disposées, qui est fonction du diamètre du tube, est plus grand pour de grands diamètres de tube que pour des petits diamètres de tube et en ce que la distance (5) des surfaces d'appui d'entretoisement (6) à la surface de base (7) de la lamelle est rendue égale au moyen d'une presse à calibrage par frappe pour toute les surfaces d'appui d'entretoisement (6) des ailettes à lamelles (1).
  2. Procédé de réalisation de l'ailette à lamelles (1) pour un échangeur de chaleur selon la revendication 1, caractérisé en ce que les ailettes à lamelles (1) reçoivent des découpes en étoile (2) à l'emporte-pièce, ensuite les languettes (3) formées par la forme en étoile des bords de ces découpes (2) sont rabattues de 90° au moyen d'outils de soyage de manière à former un col et ensuite les languettes (3) sont coudées vers l'extérieur sur au moins une partie importante de leur longueur afin de former des surfaces d'appui d'entretoisement (6) et en ce que la distance (5) des surfaces d'appui d'entretoisement (6) à la surface de base de la lamelle (7) est rendue égale au moyen d'une presse à calibrage par frappe pour tous les cols (8) des lamelles (1) ainsi formés.
EP88109600A 1987-08-29 1988-06-16 Echangeur de chaleur avec des ailettes à lamelle Expired - Lifetime EP0305665B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873728969 DE3728969A1 (de) 1987-08-29 1987-08-29 Waermetauscher mit lamellenrippen
DE3728969 1987-08-29

Publications (2)

Publication Number Publication Date
EP0305665A1 EP0305665A1 (fr) 1989-03-08
EP0305665B1 true EP0305665B1 (fr) 1992-04-15

Family

ID=6334827

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88109600A Expired - Lifetime EP0305665B1 (fr) 1987-08-29 1988-06-16 Echangeur de chaleur avec des ailettes à lamelle

Country Status (3)

Country Link
US (1) US5117905A (fr)
EP (1) EP0305665B1 (fr)
DE (3) DE8717766U1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5425414A (en) * 1993-09-17 1995-06-20 Evapco International, Inc. Heat exchanger coil assembly
US5582246A (en) 1995-02-17 1996-12-10 Heat Pipe Technology, Inc. Finned tube heat exchanger with secondary star fins and method for its production
JP3292077B2 (ja) * 1997-01-30 2002-06-17 株式会社日立製作所 熱交換器及び空気調和機
US20050155750A1 (en) * 2004-01-20 2005-07-21 Mitchell Paul L. Brazed plate fin heat exchanger
US8671705B2 (en) * 2006-11-21 2014-03-18 Sanyo Electric Co., Ltd. Showcase
WO2012016196A2 (fr) * 2010-07-30 2012-02-02 TAS Energy, Inc. Système de condensateur à refroidissement à air pour centrale électrique à cycle de rankine organique à haute performance
DE102010038945A1 (de) * 2010-08-05 2012-02-09 Behr Gmbh & Co. Kg Plattenförmiger Wärmeübertrager für eine, mindestens ein Wärmeübertragerpaket aufweisende Kühleinrichtung
WO2019062493A1 (fr) * 2017-09-30 2019-04-04 杭州三花微通道换热器有限公司 Échangeur de chaleur et ailette
JP7464872B1 (ja) * 2022-09-30 2024-04-10 ダイキン工業株式会社 熱交換器

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1174402A (en) * 1966-06-03 1969-12-17 English Electric Co Ltd Heat Exchangers.

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2737370A (en) * 1949-07-09 1956-03-06 Frisch Martin Extended surface element for heat exchanger
US3205936A (en) * 1963-06-20 1965-09-14 Astro Dynamics Inc Stacked-fin heat sink
DE2123722C3 (de) * 1971-05-13 1981-02-19 Huetoegepgyar, Jaszbereny (Ungarn) Wärmetauscher
CH551603A (de) * 1972-02-18 1974-07-15 Luwa Ag Lamelle fuer waermetauscher.
DE2527147B2 (de) * 1975-06-18 1979-10-25 Hitachi, Ltd., Tokio Blechplatten-Rohrwärmetauscher
GB2047399B (en) * 1979-04-20 1982-12-08 Du Pont Fabrication of finned-tube heat exchangers
EP0079090B1 (fr) * 1981-11-10 1986-09-10 Asea Brown Boveri Ag Echangeur de chaleur dont le faisceau de tubes est disposé enséries
GB2110811A (en) * 1981-11-28 1983-06-22 Salter & Co Ltd G Finned tube heat exchanger members
US4428418A (en) * 1982-05-17 1984-01-31 Chromalloy American Corporation Heat exchanger fin element with folded over side edges

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1174402A (en) * 1966-06-03 1969-12-17 English Electric Co Ltd Heat Exchangers.

Also Published As

Publication number Publication date
DE3870102D1 (de) 1992-05-21
EP0305665A1 (fr) 1989-03-08
US5117905A (en) 1992-06-02
DE8717766U1 (de) 1990-03-15
DE3728969A1 (de) 1989-03-09

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