EP1357345B1 - Elément d'échange de chaleur ondulé - Google Patents

Elément d'échange de chaleur ondulé Download PDF

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Publication number
EP1357345B1
EP1357345B1 EP03004778A EP03004778A EP1357345B1 EP 1357345 B1 EP1357345 B1 EP 1357345B1 EP 03004778 A EP03004778 A EP 03004778A EP 03004778 A EP03004778 A EP 03004778A EP 1357345 B1 EP1357345 B1 EP 1357345B1
Authority
EP
European Patent Office
Prior art keywords
corrugations
arrangement
heat exchanger
edge
corrugated heat
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 - Fee Related
Application number
EP03004778A
Other languages
German (de)
English (en)
Other versions
EP1357345A3 (fr
EP1357345A2 (fr
Inventor
Jens Dipl.-Ing. Nies
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.)
Modine Manufacturing Co
Original Assignee
Modine Manufacturing Co
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 Modine Manufacturing Co filed Critical Modine Manufacturing Co
Publication of EP1357345A2 publication Critical patent/EP1357345A2/fr
Publication of EP1357345A3 publication Critical patent/EP1357345A3/fr
Application granted granted Critical
Publication of EP1357345B1 publication Critical patent/EP1357345B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F28F13/08—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by varying the cross-section of the flow channels
    • 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
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements

Definitions

  • the invention relates to a corrugated heat exchange body according to the preamble of claim 1.
  • Corrugated heat exchange bodies in the present sense should be, for example, so-called corrugated fins, which are inserted in air-cooled coolers between the flat tubes arranged in series to ensure heat exchange between the medium in the flat tubes and the cooling air flowing through the corrugated fins.
  • the heat exchanger walls mentioned are in this case the broad sides of the flat tubes.
  • the vertices are arcuate.
  • corrugated heat exchange bodies are often referred to as fins or internal inserts and are located within tubes or plate-formed channels, for example plate heat exchangers found as oil coolers or the like.
  • the heat exchanger walls are the individual nested plates.
  • the vertices are usually bent in a U - shape.
  • corrugated fins are from the US Pat. No. 3,298,432 known.
  • the structures in the flanks are in the US script very fine ribs, which run obliquely in the manner of a herringbone pattern.
  • the pattern is impressed in the metal strip, and then the corrugation of the corrugated fin is made so that the arrangement direction of the structures in one flank intersects with the arrangement direction of the structures in the following flank. Since the structures in the US document are to be very fine, improved heat exchange efficiency is obtained in the region close to the wall, but the intersection of the same will barely produce a noticeable additional effect.
  • the pattern is embossed flat in the entire metal strip, it is also in the vertices of the corrugated fin, whereby the heat-conducting connection with the heat exchanger walls could be affected. In addition, this very fine structuring could lead to a poorer soldering result
  • the corrugated ribs have a similar herringbone structure, where there, because of the greater width of the metal strip, several herringbone structures are arranged one behind the other, so that there are parallel zig-zag lines.
  • the herringbone pattern is much coarser than that of the former document. An intersection of the arrangement direction from edge to edge is not provided in the DE document.
  • a plate radiator is known.
  • a Konvektorblech which is designed as a corrugated heat exchange body.
  • the heat exchange bodies described should be developed according to the task of the present invention such that they promise a further improvement in terms of their heat exchange efficiency.
  • the elements of the structures are waves of the flanks, which provide the flow channel with consequent constrictions and extensions.
  • the flanks can additionally have cuts, which harbors the same arrangement direction of the waves and connect the adjacent flow channels fluidly with each other. Such intersecting from edge to edge in their arrangement direction cuts can make a contribution to the improved heat transfer.
  • the cuts themselves are of a known nature and are bent out of the surface of the flank, resulting in openings in the flank which connect adjacent flow channels.
  • the cuts may be in the troughs or on the crests or anywhere within the waves.
  • the cuts are known to be provided with an angle of attack to the flank surface to create a turbulent flow.
  • the cuts of the invention have equal angles of attack within a flank and also in adjacent flanks.
  • the waves of the flanks and the cuts have the same arrangement direction, so that, seen in a cross section, the cuts and the waves are arranged in the flanks parallel to each other. The directions of arrangement of the cuts and waves in adjacent flanks intersect.
  • flanks are either without structure or, if necessary, can have stiffening elements.
  • the length of the elements of the structures is shorter at their beginning and at their end than in the adjoining main structure region in order to make optimum use of the surface of the flanks.
  • the length of the elements in the main structure region should preferably be the same size and amount to at least 70% of the wave height.
  • the angle of inclination of the oblique structures with respect to the vertical is preferably not greater than 45 °.
  • the illustrated heat exchange bodies have been made from an aluminum strip. However, they could also be made of another suitable metal.
  • the production takes place in such a way that first the structures 5 are embossed into the metal strip, wherein the structures 5 are spaced from each other in the strip longitudinal direction.
  • the size of the distance corresponds in the embodiment of the Fig. 1 to 6 about the later vertices 2 , which are subsequently created by bending the tape in the transverse direction. It has been shown in the embodiments, only a single wave, but it is absolutely clear that the heat exchange body 1 consists of any number of waves, so that a first and a second plane, formed from the vertices 2 , are present.
  • Fig. 1 to 6 shows a blade which is arranged as an inner liner in a channel of an oil cooler, which has not been shown in detail, however, because the arrangement of fins in plate-stacked heat exchangers is a well-known measure.
  • Fig. 1 also include frontal views on the image left and right end of the lamella.
  • On the right side of the picture Fig. 1 was only above and below each indicated a heat exchanger wall 3 , which belongs to the already mentioned plates and which are arranged in said first and second plane. Between the two heat exchanger walls 3 , said channel is formed, in which the oil flows in an oil cooler. In the not shown upwardly or downwardly adjacent channel, which may be identical, the coolant flows.
  • the oblique structures 5 in the flanks 4 of the heat exchange body 1 are in waves 6.
  • the waves 6 in a flank 4 have a length 16, wherein the length 16 in all flanks 4 should preferably be the same size. In terms of amount, the length 16 is in the range of about 10 mm and will be larger or smaller in other applications. Again, this is not a very fine ribbing, as in the US 3,298,432 which merely produces a surface roughness. From the Fig. 1 It can be seen that the shaft 6 are inclined in the front edge 4 to the vertical 14 to the left.
  • the waves 6 are inclined to the right, whereby the arrangement direction 15 of the waves 6 on the front edge 4 intersects with the arrangement direction 15 of the waves 6 on the trailing edge 4 .
  • the inclination angle ⁇ of the waves 6 to the vertical 14 in the front and in the trailing edge 4 are approximately equal.
  • an intersection of the arrangement direction 15 results, for example, even if the waves 6 are tilted in only one of the flanks 4 by the inclination angle ⁇ and are arranged in the other flank 4 in the direction of the vertical 14 . Also, therefore, this is only a preferred embodiment. How out Fig.
  • corrugated fin which is flowed through by cooling air and is arranged between the flat tubes of an air-cooled heat exchanger.
  • the distance between the structures 5 ( FIG. 7) in the strip longitudinal direction mentioned at the beginning, which is present in the prefabrication stage, is significantly greater than the radians of the vertices 2, which are approximately semicircular. Therefore, for example, in the Fig. 7 and 10 to see that the structures 5 (7) do not reach up to the top and bottom directly to the vertices 2 , but end clearly before.
  • Fig. 10 two heat exchanger walls 3 were indicated, which are each intended to represent a broad side of the flat tubes, not shown. Between adjacent flanks 4 is in each case a flow channel 20th
  • the corrugated rib is provided in its flanks 4 with cuts 7 , wherein the arrangement direction 15 of the cuts 7 intersects in an edge 4 with the arrangement direction 15 of the cuts 7 in the adjacent flank 4 .
  • two groups A , B of sections 7 were provided in this exemplary embodiment, without the number of groups being restricted to two.
  • the cuts 7 have an equal inclination angle ⁇ , but are inclined in opposite directions.
  • the sections 7 within the groups A and B in the flanks 4 are arranged parallel to each other, ie, they have been exposed in the same direction from the surface of the flanks 4 . Furthermore, all sections 7 have a same large angle ⁇ . However, the cuts 7 have been exposed in the group A to the right r and in the group B to the left I , so that an entering into the flow channel 20 air jet (arrow) in the group A to a substantial extent upwards in the not shown subsequent Flow channel 20 is passed and in the group B down in the local flow channel 20 , also not shown.
  • the length L of the cuts 7 at the beginning and at the end of the group A and B is shorter than in the main structure area 55 , which begins here with the third section 7 .
  • the cuts 7 should be before the area 21 before derseitlichen Edge 22 of the edge 4 ends to achieve sufficient rigidity of the corrugated fin.
  • a lamella in a second embodiment (see Fig. 11 a and 11 b) is a lamella as described in the first embodiment.
  • You can be traversed by cooling air or oil.
  • the lamella is inserted in a channel of a heat exchange body.
  • the special feature of these slats is that they also have cuts 7 in addition to the corrugations 6 . Due to the resulting turbulence, the heat exchange efficiency could be further improved.
  • These sections 7 are all issued at the same angle ⁇ from the lamella, so that the medium flowing through can pass from a flow channel 20 into the adjacent flow channels 20 .
  • the height h of the cuts 7 is smaller than the wave height h of the lamella in order to ensure sufficient stability of the lamella.
  • the distance 17 of the cuts 7 should preferably be the same size as half the wavelength 16 of the corrugation 6 .
  • the cuts 7 are in the individual shafts 6 , but they can also be located at other positions on the flank 4 . Which was omitted to show this in detail.
  • the cuts 7 should not extend in contrast to the waves 6 , so that the last cuts 7 are shorter than the cuts 7 in the main structure area 55 .

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Claims (7)

  1. Elément d'échangeur de chaleur ondulé (1), qui peut être fabriqué à partir d'une bande métallique et qui présente une hauteur d'ondulation (h) qui est mesurée entre les sommets (2) des ondulations, les sommets (2) formant un premier et un deuxième plan, qui se composent de plusieurs sommets (2), au moins quelques sommets (2) de chaque plan devant être connectés à des parois d'échangeur de chaleur (3) et chaque sommet (2) du premier plan étant connecté au sommet suivant (2) du deuxième plan par des flancs (4), et un canal d'écoulement (20) respectif étant réalisé entre des flancs adjacents (4), des structures (5), dont le sens de disposition (15) dans un flanc (4) croise le sens de disposition (15) dans le flanc suivant (4), étant prévues dans les flancs (4),
    caractérisé en ce que les structures (5) sont une ondulation (6) des flancs (4) qui munissent le canal d'écoulement (20) de rétrécissements (11) et d'élargissements (10) successifs alternés, le sens de disposition des ondulations (6) dans l'un des flancs (4) croisant le sens de disposition des ondulations (6) dans le flanc adjacent (4), des canaux d'écoulement adjacents (20) étant séparés l'un de l'autre par une technique d'écoulement ou bien les flancs (4) présentant des sections (7) qui ont le même sens de disposition que les ondulations (6), de sorte que les sections (7) et les ondulations (6) soient disposées parallèlement les unes aux autres et que les sections (7) relient ensemble par une technique d'écoulement des canaux d'écoulement adjacents (20).
  2. Elément d'échangeur de chaleur ondulé selon la revendication 1, caractérisé en ce que le sens de disposition (15) des ondulations (6) coïncide avec la verticale (14) et le sens de disposition (15) des ondulations (6) dans le flanc suivant (4) forme un angle d'inclinaison (α) avec la verticale (14).
  3. Elément d'échangeur de chaleur ondulé selon la revendication 1, caractérisé en ce que le sens de disposition (15) des ondulations (6) dans un flanc (4) forme un angle d'inclinaison (α) avec la verticale (14) et le sens de disposition (15) des ondulations (6) dans le flanc suivant (4) forme un angle d'inclinaison (α) opposé, mais de préférence de même valeur absolue.
  4. Elément d'échangeur de chaleur ondulé selon l'une quelconque des revendications précédentes, caractérisé en ce que la largeur des ondulations à leur début et à leur fin est plus courte que dans la région de structure principale s'y raccordant.
  5. Elément d'échangeur de chaleur ondulé selon l'une quelconque des revendications précédentes, caractérisé en ce que la largeur des ondulations dans la région de structure principale vaut au moins 70% de la hauteur des ondulations (h).
  6. Elément d'échangeur de chaleur ondulé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'angle d'inclinaison (α) des ondulations (6) par rapport à la verticale (14) n'est de préférence pas supérieur à 45°.
  7. Elément d'échangeur de chaleur ondulé selon l'une quelconque des revendications précédentes, caractérisé en ce que les deux plans formés au moyen des sommets (2) sont soit disposés parallèlement l'un à l'autre, soit présentent l'un par rapport à l'autre une distance croissante ou décroissante (hauteur d'ondulation h).
EP03004778A 2002-04-27 2003-03-05 Elément d'échange de chaleur ondulé Expired - Fee Related EP1357345B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10218912A DE10218912A1 (de) 2002-04-27 2002-04-27 Gewellter Wärmetauschkörper
DE10218912 2002-04-27

Publications (3)

Publication Number Publication Date
EP1357345A2 EP1357345A2 (fr) 2003-10-29
EP1357345A3 EP1357345A3 (fr) 2007-05-09
EP1357345B1 true EP1357345B1 (fr) 2009-09-09

Family

ID=28685319

Family Applications (1)

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EP03004778A Expired - Fee Related EP1357345B1 (fr) 2002-04-27 2003-03-05 Elément d'échange de chaleur ondulé

Country Status (3)

Country Link
US (1) US6942024B2 (fr)
EP (1) EP1357345B1 (fr)
DE (2) DE10218912A1 (fr)

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US8376036B2 (en) 2007-11-02 2013-02-19 Az Evap, Llc Air to air heat exchanger
DE202008016603U1 (de) 2008-12-15 2010-04-29 Autokühler GmbH & Co. KG Wellrippe für Wärmeaustauscher
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CN103256850A (zh) * 2013-05-24 2013-08-21 南京北大工道软件技术有限公司 一种后掠型百叶窗翅片
CN116817162A (zh) 2023-06-29 2023-09-29 中太海事技术(上海)有限公司 具有平滑顶表面和拉延筋的波纹板和储存容器

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Also Published As

Publication number Publication date
US6942024B2 (en) 2005-09-13
EP1357345A3 (fr) 2007-05-09
DE10218912A1 (de) 2003-11-06
US20030213588A1 (en) 2003-11-20
EP1357345A2 (fr) 2003-10-29
DE50311879D1 (de) 2009-10-22

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