EP0912869B1 - Echangeur de chaleur a tubes aplatis avec deux flux ou davantage et un fond de deviation pour vehicules a moteur, ainsi que son procede de fabrication - Google Patents

Echangeur de chaleur a tubes aplatis avec deux flux ou davantage et un fond de deviation pour vehicules a moteur, ainsi que son procede de fabrication Download PDF

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Publication number
EP0912869B1
EP0912869B1 EP98925532A EP98925532A EP0912869B1 EP 0912869 B1 EP0912869 B1 EP 0912869B1 EP 98925532 A EP98925532 A EP 98925532A EP 98925532 A EP98925532 A EP 98925532A EP 0912869 B1 EP0912869 B1 EP 0912869B1
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EP
European Patent Office
Prior art keywords
flat
heat exchanger
deflection
tube heat
flat tube
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
EP98925532A
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German (de)
English (en)
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EP0912869A1 (fr
Inventor
Roland Haussmann
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.)
Valeo Klimatechnik GmbH and Co KG
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Valeo Klimatechnik 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.)
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Publication date
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Publication of EP0912869A1 publication Critical patent/EP0912869A1/fr
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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
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
    • F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
    • F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
    • F28D1/05391—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits combined with a particular flow pattern, e.g. multi-row multi-stage radiators
    • 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
    • F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
    • F28F9/262—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators for radiators

Definitions

  • the invention relates to more than double-flow flat tube heat exchanger, especially evaporator, for motor vehicles with a deflection floor for the deflection adjacent floods of the flat tubes with the characteristics of The preamble of claim 1 just like a method of making one Flat tube heat exchanger.
  • a flat tube heat exchanger with deflection bottom is from DE 195 15 528 A1 known.
  • collector should not only be used understood an intermediate collector or collector on the output side become, but also an input-side distributor.
  • the invention has for its object a more than two-flow flat tube evaporator of the type mentioned to further simplify in terms of effort and manufacturability.
  • the invention represents as with the double flow Flat tube heat exchanger according to DE-A1-195 36 117, esp. Fig. 5, a departure from the idea, the redirection each in an integrally connected deflecting floor. Instead, they are also known as in this one double-flow flat tube heat exchanger of the same type prefabricated, deep-drawn reversing buttons used.
  • the individual reversing buttons can be used in the manufacture the flat tube heat exchanger, especially after Manufacturing method of claim 10, particularly simple in the pre-assembly can be included and can be done with a relatively cheaper greater depth than deflection divisions integral deflecting floors with at least one each molded separator made at the same pitch become. In addition, their use is particularly cheap, if from the point of view of being as compact as possible Construction of the flat tube heat exchanger the relative distance the flat tubes is getting smaller and smaller.
  • the invention relates generally prefer flat tube heat exchangers, which in turn are made of aluminum or an aluminum alloy are made.
  • the reversing buttons are correspondingly made of aluminum or an aluminum alloy.
  • the flat tube heat exchanger itself should preferably consist of a material that matches the material the reversing button is also compatible with soldering.
  • Claim 8 favors with flux application reliable soldering of the deflection cup from the outside with the flat tube in the particularly critical area of Separating web.
  • the flat tube heat exchanger shown in the figures is four-flow in all the illustrated embodiments trained and as an evaporator of a refrigerant circuit designed.
  • the flat tube heat exchanger has the following general Construction:
  • a larger number, typically twenty to thirty flat tubes 2 will be at constant mutual distances and aligned end faces 4. Between the flat sides 6 of the flat tubes is one Zigzag lamella 8 sandwiched. Likewise, one zigzag lamella 8 also on the two outer surfaces 4 of the outer flat tubes arranged. Every flat tube has inner stiffening webs 10 in the flat tube Divide chambers 12 acting as continuous channels. Depending on Construction depth is a number of chambers 12 from ten to thirty typical.
  • the evaporator serves as the internal heat exchange medium a refrigerant such as especially fluorocarbon, which enters the evaporator via a feed line 14 and again via an outlet line 16 from the heat exchanger exit.
  • the supply line comes from in the refrigerant circuit its liquefier.
  • the output line 16 leads to the compressor of the refrigerant circuit.
  • This collector 18 is then on an end face 4 the flat tubes 2 arranged while on the other end 4 of the flat tubes 2 only between the floods a flow reversal occurs, here by everyone Flat tube 2 individually assigned dowels 20, which may if necessary to a unit by not shown Connecting parts can be integrated.
  • the number of more than two floods means one flow reversal at least twice in the range of the Chambers 12 formed individual channels in each flat tube 2nd Unlike with double flow, in which the deflection 20 as in its function as connecting an output collector none would need further subdivision, but only the one-time redirection function can be guaranteed would have to be used in the event of a deflection of more than two Floods in each case at least in the case of four-flow shown partition 24, so that in this case the Quadrilateral a double simple redirection in each Deflection cup 20 takes place. With an even higher number of floods if necessary, the number of partitions 24 increase.
  • the collector 18 is in the illustrated embodiments in principle without restricting generality composed of a tube sheet 26 and a cover 28, where appropriate, other parts to build the Collector 18 can be provided, at least in part are given below.
  • the Collector 18 at least a two-chamber training, which separates an input side from the output side.
  • a chamber subdivision is at least one flat web in the form of a longitudinal web, which is connected to the supply line 14 communicating entrance area in the collector 18 of one separates through the outlet chamber 18, which communicates with the output line 16.
  • the evaporator also needs one if possible even supply of the refrigerant on the inlet side all flat tubes 2.
  • the feed takes place to neighboring groups of flat tubes where at least some groups have a higher number of flat tubes than have one, including the number of flat tubes per group can change.
  • Each group of flat tubes becomes one dedicated entry chamber in collector 18, which immediately communicated with the relevant group of flat tubes.
  • the entrance chambers are in the chamber division separated from one another by transverse webs designed as flat webs.
  • the feed line 14 communicates with the individual Entry chambers of the groups of flat tubes each over a separate supply line running in the collector 18, which varies designed and summarized in a tube can, which together with the curved outer pipe connection Lead 14 to the block valve mentioned below 50 from the narrow end of the collector 18, there the Lid 28, can be led out, the division of the refrigerant to the own supply lines to the own entrance chambers of the groups of flat tubes 2 the same behind the block valve 50 and before the beginning of the curve of the feed line 14 can be done.
  • the block is usually used in the finished heat exchanger from flat tubes 2 and zigzag fins 8 laterally through each a side plate adjacent to the outer zigzag lamella 46 completed, so that the side plates 48 a outer frame for the outside air flowing into the heat exchanger block form.
  • the tube sheet 26 and the cover 28 are formed from solder-coated sheet metal could be.
  • connection piece can pass into the collector 18, to two corresponding Connection piece 48 of a thermostatically controlled block valve 50 connected. This indicates the invisible opposite side two further supply side and outlet connection on.
  • the individual deflection cup 20 has one in the shown Embodiments essentially flat bowl bottom 62 on, of which there is a circumferential cup wall with front Wall sections 66 and longitudinal wall sections 68 rises.
  • the flat course of the bowl bottom 62 is only here for example to understand.
  • the longitudinal wall section 68 rises from the bottom 62 of the bowl essentially at right angles such that he has the two flat sides 6 of the associated Grips flat tube to form a solder gap.
  • the front wall section 66 an upright Collar 70, which is the narrow end face 4 of the flat tube also encompasses to form a solder gap, with a only solder gap around the flat tube both in the front Sections as well as in the longitudinal sections arises.
  • the deflection cup is made from a sheet of aluminum or an aluminum alloy, which is advantageous on the later inner surface of the surface forming the deflector Braze coated, deep drawn.
  • a sheet cutout 20 punched out and using a stamp 2 which has the contour of a flat tube 2, deep-drawn, wherein the edge sections 66 and 68 of the sheet metal section 20 to the end and longitudinal wall sections 66 and 68 of the deflection cup 20 are formed.
  • deflection buttons 20 for the four-flow Flat tube heat exchangers form two deflection cups Deflection chambers 74, each through the intermediate wall 24 in the Deflection cup are separated from each other.
  • the in the direction of flow the flooding through the relevant flat tube 2 first deflection chamber 74 diverts the first flood into the second flood, while the other deflection chamber 74 the third flood into the fourth flood redirects. If there is a higher level of multi-flow, then not shown, at least two partitions 24 in Deflection cup 20 provided.
  • Fig. 3 describes the general teaching, the separator 24 as an integral part of the deflection 20 on this train yourself.
  • 3a and 4 describe a kind of integral formation of the intermediate wall 24, the in the manufacture of the deflection cup from a deep-drawn Sheet metal in the sense of FIG. 2 is particularly suitable.
  • the respective longitudinal wall section 68 is in each case to a perpendicular to the cup bottom 62 or vertically extending inner bead 84 deformed.
  • the two of the same kind Inner beads 84 touch at their apices 68 Formation of the closed partition 24 or a corresponding one Separator between the chambers 74.
  • the relevant partition 24 on the end face 4 of the flat tube 2 each a single stiffening web 10a of the Flat tube 2 in a sealed connection opposite, which at the four-flow flat tube heat exchanger shown in this separates the second flood from the third flood. It can the stiffening web 10a either slightly reset from the outset by the corresponding end face 4 of the flat tube 2 before connection to the intermediate wall 24 in Preparation of the connection reworked, or you can when assembling the partition 24 to deform the Make stiffening web 10a usable. Except not one shown blunt connection of the intermediate wall 24 to the Stiffening web 10a comes in particular according to FIG. 3, a connection via a rounded, profiled end face of the intermediate web 24 in question. It is understood that all mentioned Connection types with each other in all exemplary embodiments, where a single separator 10a in the flat tube 2 with a Intermediate wall 24 cooperates in the deflection cup 20, replaceable are.
  • FIG. 3b An alternative of connecting the partition 24 of a deflection cup 20 on the flat tube 2 is shown in FIG. 3b.
  • the partition 24 the deflection cup 20 acts tightly with an insert 86 together, which in the disused channel 12a under filling from its clear cross-section engages like a cone.
  • the insert part 86 here has an intermediate wall 24 directly interacting head piece 87, the back the stiffening webs delimiting the closed channel 12a on both sides 10 with overlaps and under stiffening the structure of the decommissioned channel 12a at the boundaries thereof Stiffening webs 10 tightly supported.
  • connection of the deflection 20 to its associated Flat tube 2 is finally at the preferred connection options 5 with 5a and 6 explained in more detail.
  • the respective deflection cup is spoken 20 including its partition which acts as a separator 24 with the flat tube 2 as well as the entire flat tube heat exchanger brazed.
  • the deflection cup 20 is on the inner surface 88 of its two longitudinal wall sections 68 locally on both sides of the stiffening web 10a or analogously on both sides of a closed channel 12a-je a recessed, e.g. indented, feed channel 89 for the supply of flux for brazing with the Partition of the partition 24.
  • Such pairs of feed troughs 89 are in the two longitudinal wall sections 68 of the peripheral cup wall 64 of the deflection cup. They open at the respective free edge of the deflection cup 20 in a funnel-shaped outer tulip provided there 90 of this edge and extend somewhat according to FIG. 5 beyond the free end 4 of the flat tube to one there free inlet cross section 92 of the feed of the flux to keep the edge areas of the intermediate wall 24 open.
  • 5 and 6 is generally the circumferential free edge of the deflection cup forming the free end of the flat tube receiving bulge 90 to the outside bent, so that the free end face 94 this free edge runs in the direction of extension of the flat tubes 2.

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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)

Abstract

L'invention concerne un échangeur de chaleur à tubes aplatis avec deux flux ou davantage pour véhicules à moteur, pourvu d'un fond de déviation des flux adjacents (12) des tubes aplatis. Selon l'invention, le fond de déviation est subdivisé en godets de déviation (20) individuellement associés à chaque tube aplati (2) et interconnectés uniquement par l'intermédiaire de leur connexion à leur tube aplati correspondant (2). L'invention concerne un procédé de fabrication d'un tel échangeur de chaleur à tubes aplatis par étirement, dressage et sectionnement de tubes aplatis à partir d'une bobine, par prémontage mécanique des éléments constitutifs de l'échangeur de chaleur à tubes aplatis, y compris les tubes aplatis, et par soudage. Les godets de déviation (20) sont mécaniquement prémontés avec les tubes aplatis, après leur sectionnement, et avant que les tubes aplatis ne soient prémontés dans l'échangeur de chaleur à tubes aplatis.

Claims (10)

  1. Echangeur de chaleur à tubes aplatis avec deux flux ou davantage, en particulier un évaporateur, destiné aux véhicules à moteur, avec un fond de déviation pour dévier des flux voisins des tubes aplatis (2), qui présente des entretoises internes (10) de renforcement, lesquelles divisent des chambres (12) faisant office de canaux traversants pour les flux individuels, une entretoise de séparation (24) entre les flux ne communiquant pas directement l'un avec l'autre dans le fond étant disposée dans le fond de déviation, laquelle entretoise agit de façon étanche et de concert avec l'extrémité de la paroi intermédiaire entre les canaux voisins de ces flux ne communiquant pas directement dans le fond,
    caractérisé en ce que,
       le fond de déviation se compose de godets de déviation (20) associés individuellement à chaque tube aplati (2) et emboutis à partir d'aluminium ou d'un alliage d'aluminium, qui sont raccordés les uns aux autres seulement par leur raccord aux tubes aplatis (2) respectivement associés, et
       que l'entretoise de séparation (24) est une formation de paroi locale (84) du godet de déviation (20).
  2. Echangeur de chaleur à tubes aplatis selon la revendication 1, caractérisé en ce que la structure de paroi locale agit d'une manière étanche seulement de concert avec une entretoise unique de renforcement (10a) du tube aplati (2) respectif.
  3. Echangeur de chaleur à tubes aplatis selon la revendication 1, caractérisé en ce que la paroi intermédiaire entre des chambres voisines (12) du tube aplati respectif (2), qui ne conduit pas directement des flux communiquant dans le fond, est formée par une chambre (12a) du tuyau aplati (2), mise hors service en ce qui concerne l'écoulement.
  4. Echangeur de chaleur à tubes aplatis selon la revendication 3, caractérisé en ce que l'épaisseur de paroi de cette chambre mise hors service (12a) est augmentée par une pièce d'insertion encastrée (86).
  5. Echangeur de chaleur à tubes aplatis selon la revendication 4, caractérisé en ce que l'entretoise de séparation (24) est appliquée de façon étanche contre la pièce d'insertion (86).
  6. Echangeur de chaleur à tubes aplatis selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'entretoise de séparation (24) est formée par un sertissage local des deux côtés des sections de paroi longitudinales (68) du godet de déviation (20).
  7. Echangeur de chaleur à tubes aplatis selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le godet de déviation (20) sur la surface interne de ces deux côtés longitudinaux est formé localement à chaque fois avec un culot de butée (87) pour les extrémités libres des faces frontales du tube aplati respectif (2).
  8. Echangeur de chaleur à tubes aplatis selon l'une quelconque des revendications 1 à 7, caractérisé en ce que le godet de déviation (20) sur la surface interne de ses deux côtés longitudinaux (68) est formée localement dans la zone de l'entretoise de séparation, avec une goulotte (8) pour introduire du fondant destiné à un brasage fort.
  9. Echangeur de chaleur à tubes aplatis selon l'une quelconque des revendications 1 à 8, caractérisé en ce que le bord libre périphérique du godet de déviation (20) est recourbé vers l'extérieur avec formation d'une ouverture en tulipe (90) recevant l'extrémité libre du tube aplati (2) et se prolonge avec son côté frontal (94) dans la direction d'extension des tubes aplatis.
  10. Procédé de préparation d'un échangeur de chaleur à tubes aplatis selon l'une quelconque des revendications 1 à 9, par étirage, dégauchissement et tronçonnage de tubes aplatis à partir d'une bobine, par montage mécanique préalable de l'échangeur de chaleur à tubes aplatis à partir de ses éléments de construction, y compris les tubes aplatis puis brasage, en particulier un brasage fort, en employant au moins des placages de brasure sur un côté, caractérisé en ce que les godets de déviation avec les tubes aplatis sont montés mécaniquement au préalable avec les tubes aplatis, après leur tronçonnage et avant le montage préalable de l'échangeur de chaleur à tubes aplatis.
EP98925532A 1997-05-07 1998-05-05 Echangeur de chaleur a tubes aplatis avec deux flux ou davantage et un fond de deviation pour vehicules a moteur, ainsi que son procede de fabrication Expired - Lifetime EP0912869B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19719256A DE19719256B4 (de) 1997-05-07 1997-05-07 Mehr als zweiflutiger Flachrohrwärmetauscher für Kraftfahrzeuge mit Umlenkboden sowie Herstelungsverfahren
DE19719256 1997-05-07
PCT/EP1998/002637 WO1998050750A1 (fr) 1997-05-07 1998-05-05 Echangeur de chaleur a tubes aplatis avec deux flux ou davantage et un fond de deviation pour vehicules a moteur, ainsi que son procede de fabrication

Publications (2)

Publication Number Publication Date
EP0912869A1 EP0912869A1 (fr) 1999-05-06
EP0912869B1 true EP0912869B1 (fr) 2002-11-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP98925532A Expired - Lifetime EP0912869B1 (fr) 1997-05-07 1998-05-05 Echangeur de chaleur a tubes aplatis avec deux flux ou davantage et un fond de deviation pour vehicules a moteur, ainsi que son procede de fabrication

Country Status (6)

Country Link
US (1) US6315037B1 (fr)
EP (1) EP0912869B1 (fr)
CN (1) CN1228158A (fr)
BR (1) BR9804890A (fr)
DE (1) DE19719256B4 (fr)
WO (1) WO1998050750A1 (fr)

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Also Published As

Publication number Publication date
WO1998050750A1 (fr) 1998-11-12
CN1228158A (zh) 1999-09-08
US6315037B1 (en) 2001-11-13
DE19719256A1 (de) 1998-11-12
EP0912869A1 (fr) 1999-05-06
BR9804890A (pt) 1999-08-31
DE19719256B4 (de) 2005-08-18

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