EP1296109B1 - Echangeur de chaleur avec un bloc de tubes plats ailettés et la méthode d'assemblage associée - Google Patents

Echangeur de chaleur avec un bloc de tubes plats ailettés et la méthode d'assemblage associée

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Publication number
EP1296109B1
EP1296109B1 EP02010989A EP02010989A EP1296109B1 EP 1296109 B1 EP1296109 B1 EP 1296109B1 EP 02010989 A EP02010989 A EP 02010989A EP 02010989 A EP02010989 A EP 02010989A EP 1296109 B1 EP1296109 B1 EP 1296109B1
Authority
EP
European Patent Office
Prior art keywords
flat tube
flat
heat exchanger
flat tubes
sides
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
EP02010989A
Other languages
German (de)
English (en)
Other versions
EP1296109A3 (fr
EP1296109A2 (fr
Inventor
Werner Dipl.-Ing. Zobel
Jörg Dr. Ing. Soldner
Herbert Marschner
Harald Dipl.-Ing. Schatz
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 EP1296109A2 publication Critical patent/EP1296109A2/fr
Publication of EP1296109A3 publication Critical patent/EP1296109A3/fr
Application granted granted Critical
Publication of EP1296109B1 publication Critical patent/EP1296109B1/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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • F28F9/0221—Header boxes or end plates formed by stacked elements
    • 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
    • Y10T29/49352—Repairing, converting, servicing or salvaging
    • 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
    • Y10T29/49391—Tube making or reforming

Definitions

  • the invention relates to a heat exchanger with a ribbed flat tube block, consisting of flat tubes and ribs arranged therebetween, the ends of the flat tubes opening into opposite collecting or deflecting boxes; the ends of the flat tubes are reshaped so that in each case one broad side of the flat tubes can be connected to the adjacent broad side of the next flat tube, which at least partially terminate the collecting or deflecting boxes, the ends of the flat tubes with their narrow sides having connection edges of the collecting or deflection boxes in contact and connected by soldering. Furthermore, the invention relates to production processes for such heat exchangers.
  • the object of the invention is to reshape heat exchanger with the features mentioned above and to provide suitable manufacturing process for the redesigned heat exchanger that they have much lower pressure drop, the other benefits are to be preserved.
  • the ends of the flat tubes are deformed such that the broad sides of adjacent flat tube ends are connected to their former inner sides, or that the connection is provided between the outer side of the broad side of a flat tube end and the former inner side of the broad side of the adjacent flat tube end is.
  • either two former inner sides are connected to one another, or in each case a former inner side of the broad side of one flat tube end is connected to the outer side of the broad side of the adjacent flat tube end.
  • the collecting or deflecting boxes are closed downwards (towards the flat tube ends) by the connected broad sides of the flat tube ends.
  • the end faces of the collecting or deflecting boxes can be closed in other ways.
  • a comparatively low pressure loss is realized, because such a design of the compound results in a nearly flat or wavy, in any case, a streamlined and the collection box facing surface, which is formed by the insides of the broadsides.
  • the connection of the broad sides is provided over the entire width of the flat tubes reaching.
  • the flat tubes are not constricted at the ends in their large diameter, which is why there is no pressure loss caused.
  • the former inner sides of the broad sides are those sides which lie in the flat tube before forming the ends inside the flat tube.
  • the broad sides are "turned over" at the ends, so to speak, wherein the connection of the adjacent flat tube end serving former inner sides are preferably arranged approximately parallel to the broad sides of the flat tubes.
  • the broad sides are arranged in one embodiment in the region of their connection perpendicular or parallel to the flat tubes, wherein they have two bends of about 90 °.
  • the broad sides are arranged in the region of their connection with an angle to the flat tubes, wherein the broad sides have a bend of about 90 ° and a second, which corresponds to the angle of the inclined position.
  • a flat, corrugated surface is present, because the broad sides are curved in an arc shape, wherein one end of the arc leads to the inlet or outlet funnel of the respective flat tube and the other end for connection between the former inner sides of the broad sides of adjacent flat tubes. It is particularly favorable if, when viewed in cross section, two connected and arcuately shaped broad sides in each case form approximately a semicircle or a half ellipse.
  • the approximately flat or preferably corrugated surface has inlet or outlet funnels in the flat tubes.
  • the surface is in any case designed so that as far as possible only a negligible pressure loss is caused when the medium flows into the flat tubes.
  • the flat tubes themselves are formed in an embodiment of two half-shells.
  • the former inside of the broad side is in this embodiment, then the side which represents the inner broad side of the flat tube or the half-shell in a flat tube assembled.
  • DE 100 16 113.8 which is to be considered as disclosed here.
  • drawn or welded flat tubes are provided, which have at their ends in their narrow sides at least one separating cut, which divides the ends into two parts, which are formed.
  • the deeper the separation cut is provided the larger the already mentioned distance between the flat tubes can be made. Conversely, a smaller distance can thus be realized at a smaller depth.
  • a manufacturing method when welded or drawn flat tubes are used, provides that the narrow sides of the flat tube ends be separated, that the two broad sides of the flat tube ends be deformed so that their former inner sides are outside and at a distance from the broad side of the flat tube, that the flat tubes are combined with the thus formed flat tube ends with the ribs to the rib - flat tube block, wherein the former inner sides of the Broad sides of adjacent flat tube ends joined together and connected during soldering of the rib - flat tube block.
  • the flat tube ends can be previously brought to a sharp-edged, rectangular cross-section.
  • this step can be omitted if the flat tubes already have an approximately rectangular cross-section with relatively sharp bending edges.
  • the rectangular cross section creates better conditions to be able to solder the narrow sides of the flat tubes with the connecting edges of the manifolds tight and durable.
  • the narrow sides have been eliminated, at least where the broad sides of adjacent flat tube ends are connected, by squeezing or similar deformation.
  • Another inventive manufacturing method for heat exchangers with flat tubes of half-shells provides that the ends of the half-shells of the flat tubes are deformed so that the former inside of the broad sides is outside and at a distance from the broad side of the half-shells, that the half shells to the flat tube and the flat tubes with the ribs to the rib - flat tube block are joined together, wherein the former inner sides of adjacent half shells of adjacent flat tubes joined together and connected during soldering of the rib - flat tube block.
  • Fig. 1 illustrates a heat exchanger in which only the upper header 5 is shown.
  • the lower collection box 5, not shown, at the opposite ends 4 of the flat tubes 2 may be identical or similar.
  • the entire heat exchanger, consisting of the flat tubes arranged in series 2 , with interposed corrugated fins 3 , the collecting boxes 5 and not shown connecting members, was made of solder coated aluminum sheet, which has long been part of the prior art.
  • flat tubes 2 in use which consist of two half-shells, which are in the narrow sides 8 , on the center 30 , joined together and soldered later.
  • the flat tubes 2 prepared in this way are assembled in alternating sequence with corrugated ribs 3 for the rib-flat tube block, in this embodiment in each case the former inner sides 10 of the broad sides 6 of the flat tube ends 4 being in contact, so that they can later be connected together when soldering the heat exchanger.
  • suitable mechanization and automation means are suitable mechanization and automation means, the use of which is provided in terms of economic efficiency.
  • the heat exchanger described so far is the coolant radiator of a motor vehicle.
  • Fig. 7 it is shown that the flat tube ends 4 are first brought to a sharp-edged rectangular cross section by a corresponding tool is introduced. This operation is optional and depends on the shape of the present flat tubes 2 . Thereafter, as shown in Fig. 6, in contrast to the embodiment described above, two separating cuts 20 are attached to all flat tube ends 4 in the two narrow sides 8 . This results in the flat tube ends 4, the parts 20a , 20b and 20c , which were designated in Fig. 6.
  • the two lateral parts 20a and 20b are then reshaped, as already described.
  • the middle relatively wide part 20c is folded inwards, which is also a not necessary measure.
  • the rigidity in the narrow sides 8 raised so that the subsequent connection with the connection edges 7 of the manifolds 5 can be positively influenced.
  • all parts 20a and 20b of the flat tube ends 4 are each provided with two rather sharp edges Bends 15 provided so that the surface 11 (Fig. 3 and 4), which results after assembly of the flat tubes 2 with the corrugated fins 3 and the subsequent application of the collecting boxes 5 , is relatively flat. It is interrupted at regular intervals by inflow funnels 12 in the flat tubes 2 . This is apparent from Figs. 2 and 4. Such a flat surface 11 with inflow funnels 12 creates good flow conditions which allow a very low pressure loss of the agent flowing through the flat tubes 2 .
  • connection between the broad sides 6 of adjacent flat tube ends 4 is achieved by fitting the former inner side 10 of the broad side 6 of one flat tube end 4 when joining the rib-flat tube block the outside 13 of the broad side 6 of the adjacent flat tube end 4 is applied becomes.
  • the connecting surface formed between the outer side 13 and the former inner side 10 is arranged approximately perpendicular to the longitudinal direction of the flat tubes 2 .
  • Such variants are provided, for example, because in some applications, the flat tubes 2 are made of only on the outside 13 lotplattiertem aluminum sheet. Furthermore, it is advantageous if, as shown in FIGS.
  • a prefixing 40 is made, which precedes the rib-flat tube block before being joined to the manifolds 5 and before soldering gives provisional support.
  • the prefix 40 can be made with a tool that partially interlocks the adjacent surfaces.
  • equivalent prefixes 40 are available to those skilled in the art.
  • a prefix 40 is otherwise possible in the previously described embodiments.
  • the bend 50 described above also acts as a prefix 40 .
  • the compound of broadsides 6 is provided over the entire width of the flat tubes 2 reaching.
  • the flat tubes 2 are not constricted at the ends 4 in their large diameter D , which is why there is no pressure loss caused.
  • FIGS. 5 and 11 which each show plan views of a single flat tube 2 with a deformed end 4 , which belong to the first embodiment, in which the former inner sides 10 of the broad sides 6 of adjacent flat tube ends 4 are connected to each other.
  • the connection over the entire width of the flat tubes 2 has also been provided in the second exemplary embodiment (FIGS. 12-15), in which the former inner side 10 is in each case connected to the outer side 13 .

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (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 (15)

  1. Echangeur de chaleur (1) avec un bloc d'ailettes (3) et de tubes plats (2), constitué de tubes plats (2) disposés en rangée et d'ailettes (3) intercalées entre eux, les extrémités (4) des tubes plats (2) débouchant dans des caisses collectrices ou déflectrices (5) opposées ; les extrémités (4) des tubes plats (2) étant façonnées de telle sorte qu'à chaque fois un côté large (6) des tubes plats (2) soit connecté au côté large adjacent (6) du tube plat (2) suivant ; les côtés larges (6) fermant ainsi au moins partiellement les caisses collectrices ou déflectrices (5) ; les extrémités (4) des tubes plats (2) étant en contact avec leurs petits côtés (8) avec des bords de connexion (7) des caisses collectrices ou déflectrices (5) et étant connectées par brasage,
    caractérisé en ce que
    les extrémités (4) sont façonnées de telle sorte que les côtés larges (6) d'extrémités de tubes plats voisines (4) soient connectées au niveau de leurs côtés préalablement internes (10), ou de telle sorte que la connexion soit effectuée entre le côté externe (13) du côté large (6) d'une extrémité de tube plat (4) et le côté préalablement interne (10) du côté large (6) de l'extrémité de tube plat voisine (4).
  2. Echangeur de chaleur selon la revendication 1, caractérisé en ce que les côtés larges (6) présentent deux coudages (15) à environ 90° et sont disposés dans la région de leur connexion parallèlement à l'axe longitudinal (30) des tubes plats (2).
  3. Echangeur de chaleur selon la revendication 1, caractérisé en ce que les côtés larges (6) sont disposés dans la région de leur connexion avec une position en biais par rapport à l'axe longitudinal (30) des tubes plats (2), les côtés larges (6) présentant un coudage d'environ 90° et un deuxième coudage qui correspond à l'angle de la position en biais.
  4. Echangeur de chaleur selon la revendication 1, caractérisé en ce que les côtés larges (6) sont formés approximativement en forme d'arc, de préférence de telle sorte que, vus en section transversale, deux côtés larges respectivement connectés (6) possèdent approximativement une étendue semi-circulaire ou semi-elliptique.
  5. Echangeur de chaleur selon la revendication 1, caractérisé en ce qu'au niveau de la connexion entre le côté externe (13) du côté large (6) d'une extrémité de tube plat (4) et le côté préalablement interne (10) du côté large (6) de l'extrémité de tube plat adjacente (4), la surface de connexion est disposée approximativement perpendiculairement à l'axe longitudinal (30) des tubes plats (2).
  6. Echangeur de chaleur selon l'une quelconque des revendications précédentes, caractérisé en ce que les côtés larges (6) façonnés au niveau des extrémités (4) constituent la terminaison inférieure de la caisse collectrice (5) et forment en l'occurrence une surface approximativement plane (11) ou une surface ondulée (11) s'étendant dans un plan, la surface (11) présentant des entonnoirs d'afflux (12) dans les tubes plats (2).
  7. Echangeur de chaleur selon la revendication 1, caractérisé en ce que les tubes plats (2) sont formés de deux demi-coques respectives.
  8. Echangeur de chaleur selon l'une quelconque des revendications 1 à 6, caractérisé en ce que l'on prévoit de préférence des tubes plats (2) soudés, qui présentent aux extrémités (4) dans leurs petits côtés (8) au moins une découpe de séparation (20) qui divise les extrémités (4) en deux parties (20a, 20b) qui sont façonnées.
  9. Echangeur de chaleur selon la revendication 1 et la revendication 8, caractérisé en ce que deux découpes de séparation (20) sont prévues en dehors du centre (30) des petits côtés (8).
  10. Echangeur de chaleur selon la revendication 9, caractérisé en ce que les petits côtés (8 ; 20c) restant entre les découpes de séparation (20) sont repliés vers l'intérieur à l'intérieur du tube plat (2).
  11. Echangeur de chaleur selon la revendication 1 et la revendication 8, caractérisé en ce qu'une découpe de séparation unique (20) est prévue au centre (30) des deux petits côtés (8).
  12. Procédé de fabrication d'échangeurs de chaleur ayant les caractéristiques des revendications 1 et 8, comprenant les étapes suivantes :
    les petits côtés (8) des extrémités des tubes plats (4) sont séparés,
    les deux côtés larges (6) des extrémités des tubes plats (4) sont façonnés de telle sorte que leurs côtés préalablement internes (10) se trouvent à l'extérieur et à distance du côté large (6) du tube plat (2) ;
    les tubes plats (2) avec les extrémités des tubes plats (4) ainsi façonnées sont assemblés aux ailettes (3) pour former un bloc d'ailettes et de tubes plats,
    caractérisé en ce que
    soit les côtés préalablement internes (10) des côtés larges (6) d'extrémités de tubes plats voisines (4), soit à chaque fois un côté préalablement interne (10) et un côté externe (13) sont assemblés mutuellement et sont connectés lors du brasage du bloc d'ailettes et de tubes plats ou de l'échangeur de chaleur.
  13. Procédé selon la revendication 12, caractérisé en ce que les petits côtés (8) sont écartés par écrasement ou par déformation similaire au moins là où les côtés larges (6) d'extrémités de tubes plats voisines (4) sont connectés.
  14. Procédé selon la revendication 12 ou 13, caractérisé en ce que les extrémités de tubes plats (4) sont pourvues, avant la séparation des petits côtés (8), d'une section transversale rectangulaire.
  15. Procédé de fabrication d'échangeurs de chaleur ayant les caractéristiques des revendications 1 et 7, et comprenant les étapes suivantes :
    les extrémités (4) des demi-coques des tubes plats (2) sont façonnées de telle sorte que le côté préalablement interne (10) des côtés larges (6) se trouve à l'extérieur et à distance du côté large (6) des demi-coques ;
    les demi-coques sont assemblées pour former un tube plat (2) et les tubes plats (2) sont assemblés aux ailettes (3) pour former le bloc d'ailettes et de tubes plats,
    caractérisé en ce que soit les côtés préalablement internes (10) de demi-coques adjacentes d'extrémités de tubes plats adjacentes (4), soit à chaque fois un côté préalablement interne (10) et un côté externe (13) sont assemblés mutuellement et sont connectés lors du brasage du bloc d'ailettes et de tubes plats ou de l'échangeur de chaleur.
EP02010989A 2001-09-25 2002-05-17 Echangeur de chaleur avec un bloc de tubes plats ailettés et la méthode d'assemblage associée Expired - Lifetime EP1296109B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10147192 2001-09-25
DE10147192A DE10147192A1 (de) 2001-09-25 2001-09-25 Wärmeaustauscher mit einem Rippen-Flachrohr-Block und Herstellungsverfahren

Publications (3)

Publication Number Publication Date
EP1296109A2 EP1296109A2 (fr) 2003-03-26
EP1296109A3 EP1296109A3 (fr) 2005-01-26
EP1296109B1 true EP1296109B1 (fr) 2006-10-04

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EP02010989A Expired - Lifetime EP1296109B1 (fr) 2001-09-25 2002-05-17 Echangeur de chaleur avec un bloc de tubes plats ailettés et la méthode d'assemblage associée

Country Status (4)

Country Link
US (1) US6668916B2 (fr)
EP (1) EP1296109B1 (fr)
AT (1) ATE341745T1 (fr)
DE (2) DE10147192A1 (fr)

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Also Published As

Publication number Publication date
DE50208321D1 (de) 2006-11-16
DE10147192A1 (de) 2003-04-17
EP1296109A3 (fr) 2005-01-26
ATE341745T1 (de) 2006-10-15
US6668916B2 (en) 2003-12-30
EP1296109A2 (fr) 2003-03-26
US20030056945A1 (en) 2003-03-27

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