EP0672882B1 - Ailette pour échangeur de chaleur - Google Patents

Ailette pour échangeur de chaleur Download PDF

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Publication number
EP0672882B1
EP0672882B1 EP94120181A EP94120181A EP0672882B1 EP 0672882 B1 EP0672882 B1 EP 0672882B1 EP 94120181 A EP94120181 A EP 94120181A EP 94120181 A EP94120181 A EP 94120181A EP 0672882 B1 EP0672882 B1 EP 0672882B1
Authority
EP
European Patent Office
Prior art keywords
punched
fin
noses
fins
tubes
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
EP94120181A
Other languages
German (de)
English (en)
Other versions
EP0672882A1 (fr
Inventor
Werner Dipl.-Ing. Helms (Fh)
Roland Hemminger
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 EP0672882A1 publication Critical patent/EP0672882A1/fr
Application granted granted Critical
Publication of EP0672882B1 publication Critical patent/EP0672882B1/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
    • 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
    • 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
    • F28F2275/00—Fastening; Joining
    • F28F2275/12—Fastening; Joining by methods involving deformation of the elements
    • F28F2275/125—Fastening; Joining by methods involving deformation of the elements by bringing elements together and expanding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/454—Heat exchange having side-by-side conduits structure or conduit section
    • Y10S165/50—Side-by-side conduits with fins
    • Y10S165/501—Plate fins penetrated by plural conduits
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/454—Heat exchange having side-by-side conduits structure or conduit section
    • Y10S165/50—Side-by-side conduits with fins
    • Y10S165/501—Plate fins penetrated by plural conduits
    • Y10S165/502—Lanced
    • Y10S165/503—Angled louvers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49377—Tube with heat transfer means
    • Y10T29/49378—Finned tube
    • Y10T29/4938—Common fin traverses plurality of tubes

Definitions

  • the invention relates to a fin for a heat exchanger according to the preamble of claim 1.
  • Such heat exchanger fins were described in DE-A-37 28 969 and also known from DE-C-34 23 746.
  • rib density or so-called rib pitch (Number of ribs per dm) decisive - for reasons
  • This predetermined rib density is therefore of constant quality to adhere exactly to why the positioning of the ribs on the Pipes certain spacers are provided.
  • the latter can either as a flap protruding from the ribbed sheet, which then also act as turbulence generators, are formed, or by angled contact surfaces attached to the ends of the rib passages.
  • these contact surfaces are on the circumference Distributed tongues formed and in the DE-C '746 as on the long sides of the ellipses arranged crescent-shaped contact surfaces. Disadvantageous in these versions, it may be that when expanding the Pipes no longer a complete system compared to the fins between passage and pipe is guaranteed. Otherwise means relocating the contact surfaces after an additional operation pulling through.
  • GB-A 2 088 035 developed a heat exchanger with flat tubes and Known ribs that are soldered to the tubes.
  • the ribs point right-angled openings for receiving the flat tubes, taking off These openings have rectangular flaps in the area of the long sides are cut out and set up. These are flat rags soldered to the flat sides of the flat tubes. For spacing the ribs have these right-angled lobes in the form of noses ( Figures 6 and 7).
  • This kind of Pipe / fin connection is for mechanical production, i.e. without Soldering, not suitable.
  • GB-A 1 075 272 also shows a brazed flat tube system about rectangular openings in the ribs, from which rag in the area the long sides are upright. On this rag bends are provided at the end for spacing. Also this tube / fin connection is for a mechanical bond of Pipes and fins are not suitable.
  • GB-A 1 174 402 established a mechanically joined Pipe / fin system is known, in which the pipes compared to the Passages in the ribs are mechanically widened.
  • the passages have bent tongues at the ends, distributed over the circumference, which serve to hold the ribs apart. Bending the tongues means an additional operation, which is the manufacturing cost elevated.
  • the new spacers in the form of Noses are partially stamped out of the wall of the passage, so that with its upper edge it is a contact surface for the above form arranged rib.
  • the noses are too easy to manufacture because of the additional folding process after pulling through is omitted.
  • the heat transfer is also guaranteed since the noses are only partially provided and thus the heat transfer hardly between inner surface passage and outer surface pipe restrict.
  • the noses also expand upwards is the lower tip of such a nose, e.g.
  • the lugs are embossed in rags, which surpass the remaining draft in terms of its amount and thus the degree of rib division, i.e. the rib spacing.
  • the noses to be arranged against each other this allows the maximum height of the Rags are made. If the rib spacing in relation to Pull width is smaller, the lugs or lobes can also opposite.
  • the invention also relates to a method for pulling through with the noses to make what's in four or three consecutive Operations are done with the imprint of the noses either by a punch stroke in the pulling direction or in the opposite direction he follows.
  • Figure 1 shows a rib 1 in plan view with flat oval passages 2, which are arranged offset in two rows to one another, wherein each gill panels 3 are arranged between the passages 2.
  • the passages 2 accommodate pipes of the same cross section, not shown, which are mechanically widened with respect to these passages and thereby produce the contact necessary for heat conduction or heat transfer.
  • the rib 1 essentially forms a flat surface 4.
  • Each passage 2 has - as will be explained in more detail below - three lugs 8, 9, 10.
  • the rib 1 is preferably made of aluminum or an aluminum alloy and has a thickness of approximately 0.1 mm.
  • Figure 2 shows a section II-II through the rib of Figure 1 in an enlarged form, so that in particular the known inclined gills of the gill panels 3 can be seen. They deflect the air sweeping over the fins, which increases the air-side heat transfer.
  • two passages 2 are shown in the side view, three tabs 5, 6, 7 each being recognizable, into which the lugs 8, 9, 10 are each stamped in the center.
  • the tabs 5, 6, 7 are thus arranged offset from one another, ie the tabs 5 and 7 are located at the front, and the tab 6 is located at the rear, ie on the rear longitudinal side of the passage 2.
  • a passage 2, also enlarged, is shown in FIG. 3 , specifically in plan view a as a flat oval shape, from which the lugs 8, 9, 10 are clearly recognizable as bulges in the form of segments of a circle.
  • a dash-dotted line 11 is drawn in the interior of the flat oval passage 2, which delimits a punched-out section 12, so that the passage surface 2 'can be seen in the flat, not yet solid state.
  • Sections c and b of the passage are shown on the right and left of the passage a , the left illustration b showing the centrally arranged tab 6 with the nose 9 and the right illustration c showing the two off-center tabs 5 and 7 with the lugs 8 and 10.
  • the lugs 8, 9, 10 each have an outwardly sloping upper edge 8 ', 9', 10 ', which determines the distance H' (see FIG. 6) of the ribs. It is clear that the height H of the tabs 5, 6, 7 exceeds the height h of the rest of the passage - however, a continuous area 13 of height h is obtained which bears on all sides on the outer circumference of the tube, so that a closed heat transfer surface between the rib and tube is formed, which also maintains the elastic tension required after expansion.
  • FIGS. 4a, 4b, 4c and 4d now - as already indicated in FIG. 3 by line 11 - show the individual process steps for producing the swipe according to the invention.
  • FIG. 4a shows the ribbed sheet 20 after punching, ie a strip 24 with rounded ends 22, 23 is cut out of the flat ribbed sheet 20 by means of a suitable punch, whereby offset tabs 25, 26, 27 are cut free.
  • FIG. 4b in the subsequent process step, tabs 28, 29, 30 are embossed into these tabs 25, 26, 27 by means of an embossing stamp, which are pyramid-shaped, that is to say are formed from two planar triangular surfaces inclined towards one another.
  • an embossing stamp which are pyramid-shaped, that is to say are formed from two planar triangular surfaces inclined towards one another.
  • the passage is completed, ie the collar 21 is pulled through by means of a stamp, not shown, so that it acquires a cylindrical shape (with a flat oval cross section) and the noses 25 ′′, 26 ′′, 27 ′′ as The triangles protrude outwards, which is made possible by corresponding cutouts 32, 33, 34 in the die.
  • the passages with the molded noses can be produced simply, quickly and with consistent quality.
  • FIG. 5 shows an enlarged section of a tube 40, on which ribs 41 to 45 are “threaded”.
  • This tube 40 is part of a heat exchanger (not shown in more detail), the tube shape and division and fin design of which could correspond to FIG.
  • the ribs 41 to 45 are mechanically joined to the tube 40, ie connected by expanding the tube 40 with respect to the rib passages by means of a metallic press fit. So there is no soldering or gluing, ie material connection is necessary.
  • FIG. 6 shows an enlargement of a section from FIG. 5, namely a part of the tube wall 40 and three rib cutouts 41, 42, 43 which, with their passages 46, 47, 48 of height h, lie closely and circumferentially on the tube 40, while their noses 49, 50 , 51 protrude from the outer wall of the tube 40 and determine the distance H 'between the ribs 41, 42, 43 with its upper edge.
  • the rib spacing H ' is slightly smaller than the height H of the tabs (cf. FIG. 3b, c) because the rib passage has a transition radius on which the lugs are supported.
  • FIGS. 5 and 6 show the finished tube / fin arrangement, ie after the tube 40 has been expanded in the mechanically finished state of the tube and fin passages.
  • Such fins connected with a bundle of parallel tubes are, in turn, taken up in tube sheets from collecting tanks are used in particular in heat exchangers for motor vehicles, e.g. as a coolant / air cooler for the engine or as a heating heat exchanger.
  • Flat oval tube cross-sections work here advantageous in terms of air pressure drop.

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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 (10)

  1. Ailette destinée à un échangeur de chaleur qui consiste essentiellement en une matrice de tubes et d'ailettes (1 ; 41-45) disposée perpendiculairement à ces derniers, les ailettes comportant des passages (2 ; 46-48) de logement de tubes à assembler mécaniquement et un premier fluide, de préférence liquide, circulant dans les tubes et les ailettes étant balayées par un deuxième fluide de préférence gazeux et étant positionnées par des entretoises monobloc à leur pas d'ailettes, caractérisée en ce que les entretoises sont conformées en talons (8, 9, 10; 49, 50, 51) réalisés par estampage dans les passages (2 ; 46-48) et répartis à la circonférence de ces derniers, les talons (8, 9, 10) s'élargissant dans la direction du passage et formant une arête supérieure d'appui (8', 9', 10') et en ce que le bord inférieur des talons (8, 9, 10 ; 49, 50, 51) est disposé à peu près à une hauteur h au-dessus du plan (4) de l'ailette et en ce qu'ainsi un anneau circonférentiel de passage (13) prenant appui de tous côtés contre le tube demeure conservé.
  2. Ailette selon la revendication 1, caractérisée en ce que la section des tubes et des passages (2) est circulaire.
  3. Ailette selon la revendication 1, caractérisée en ce que la section des tubes et des passages (2) est ovale ou elliptique, de préférence avec un rapport des axes qui est supérieur à 3:1.
  4. Ailette selon la revendication 1, 2 ou 3, caractérisée en ce que les talons (8, 9, 10) présentent dans des plans parallèles aux ailettes une section en demi-cercle, en segment de cercle, en demi-ellipse ou triangulaire.
  5. Ailette selon l'une des revendications précédentes, caractérisée en ce que chacun des talons (8, 9, 10) est réalisé par estampage dans des languettes (5, 6, 7) dont la hauteur H est supérieure à la hauteur h du reste du passage (2).
  6. Ailette selon l'une des revendications précédentes, à l'exception de la revendication 2, caractérisée en ce que les talons (8, 9, 10) sont disposés sur les côtés longs du passage (2).
  7. Ailette selon la revendication 6, caractérisée en ce que les talons (8, 9, 10) sont disposés en étant décalés les uns par rapport aux autres.
  8. Procédé de réalisation de passages d'ailettes selon l'une des revendications précédentes, caractérisé par les étapes suivantes de procédé :
    a) des trous de passage (12 ; 22-23-24) sont réalisés à l'emporte-pièce dans la tôle plane d'ailette (4), des languettes (25, 26, 27) étant dégagées par la découpe,
    b) des talons (28, 29, 30) sont réalisés par estampage dans les languettes (25, 26, 27) au moyen d'un poinçon d'estampage exerçant une pression dans la direction du passage,
    c) les languettes (25, 26, 27) ainsi que les talons (28, 29, 30) réalisés par estampage vers l'extérieur sont relevés et mis en appui par rabattement au moyen d'un poinçon et d'une matrice et
    d) l'ensemble du passage, c'est à dire le collet (21) ainsi que les languettes (25, 26, 27) subissent un soyage d'achèvement.
  9. Procédé de réalisation de passages dans des ailettes selon l'une des revendications 1 à 7, caractérisé par les étapes suivantes du procédé :
    a) des trous de passage sont réalisés à l'emporte-pièce dans la tôle plane d'ailette (4) et des languettes sont dégagées par la découpe,
    b) l'ensemble du passage, c'est à dire le collet et les languettes, subissent un soyage pour être mis à une forme cylindrique,
    c) les talons sont réalisés par estampage au moyen d'un poinçon d'estampage qui arrive par le haut dans l'extrémité libre du passage.
  10. Echangeur de chaleur qui se compose essentiellement d'une matrice de tubes et d'ailettes disposées perpendiculairement à ces derniers, les ailettes comportant des passages de logement des tubes assemblés mécaniquement et un premier fluide, de préférence liquide, circulant dans les tubes et les ailettes étant balayées par un deuxième fluide, de préférence gazeux, et étant positionnées à leur pas d'ailettes par des entretoises monobloc, caractérisé par des ailettes selon l'une des revendications 1 à 7.
EP94120181A 1994-02-16 1994-12-20 Ailette pour échangeur de chaleur Expired - Lifetime EP0672882B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4404837A DE4404837A1 (de) 1994-02-16 1994-02-16 Rippe für Wärmetauscher
DE4404837 1994-02-16

Publications (2)

Publication Number Publication Date
EP0672882A1 EP0672882A1 (fr) 1995-09-20
EP0672882B1 true EP0672882B1 (fr) 1998-10-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP94120181A Expired - Lifetime EP0672882B1 (fr) 1994-02-16 1994-12-20 Ailette pour échangeur de chaleur

Country Status (4)

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US (2) US5582244A (fr)
EP (1) EP0672882B1 (fr)
DE (2) DE4404837A1 (fr)
ES (1) ES2123089T3 (fr)

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JP6314106B2 (ja) * 2015-03-16 2018-04-18 リンナイ株式会社 熱交換器用の伝熱フィン、及びそれを備えた熱交換器
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FR3038976B1 (fr) * 2015-07-17 2019-08-09 Valeo Systemes Thermiques Echangeur de chaleur a ailettes comprenant des persiennes ameliorees
FR3038977B1 (fr) * 2015-07-17 2019-08-30 Valeo Systemes Thermiques Echangeur de chaleur a ailettes comprenant des persiennes ameliorees
EP3421919A4 (fr) * 2016-02-24 2019-11-06 Mitsubishi Electric Corporation Échangeur de chaleur
ES2840726T3 (es) * 2016-07-01 2021-07-07 Mitsubishi Electric Corp Intercambiador de calor y dispositivo de ciclo de refrigeración dotado de intercambiador de calor
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
JP6656279B2 (ja) * 2018-02-15 2020-03-04 三菱電機株式会社 熱交換器
CA3036460A1 (fr) * 2018-03-14 2019-09-14 Rheem Manufacturing Company Ailette d'echangeur thermique
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USD906268S1 (en) 2018-09-11 2020-12-29 Rheem Manufacturing Company Heat exchanger fin
TWM586379U (zh) * 2018-11-14 2019-11-11 訊凱國際股份有限公司 散熱器與散熱鰭片
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WO2023113362A1 (fr) * 2021-12-14 2023-06-22 주식회사 경동나비엔 Ailettes et échangeur de chaleur les comprenant

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GB2088035B (en) * 1980-10-22 1984-05-31 Serck Industries Ltd Finned-tube heat exchanger
JPS58127092A (ja) * 1982-01-25 1983-07-28 Nippon Denso Co Ltd 熱交換器及びその製法
JPS6449892A (en) * 1987-08-20 1989-02-27 Fujitsu General Ltd Heat exchanger
DE3910357A1 (de) * 1989-03-30 1990-10-04 Autokuehler Gmbh & Co Kg Leitblech fuer einen waermetauscher und daraus hergestelltes waermetauschernetz
AT394108B (de) * 1990-07-31 1992-02-10 Vaillant Gmbh Lamellenblock-waermetauscher
DE4129573C2 (de) * 1991-09-06 1997-10-23 Behr Gmbh & Co Wärmetauscher

Also Published As

Publication number Publication date
DE59407053D1 (de) 1998-11-12
ES2123089T3 (es) 1999-01-01
DE4404837A1 (de) 1995-08-17
US5706695A (en) 1998-01-13
US5582244A (en) 1996-12-10
EP0672882A1 (fr) 1995-09-20

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