EP3457070B1 - Collecteur destiné à un ensemble échangeur de chaleur et procédé de fabrication d'un tel collecteur - Google Patents

Collecteur destiné à un ensemble échangeur de chaleur et procédé de fabrication d'un tel collecteur Download PDF

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Publication number
EP3457070B1
EP3457070B1 EP17461606.0A EP17461606A EP3457070B1 EP 3457070 B1 EP3457070 B1 EP 3457070B1 EP 17461606 A EP17461606 A EP 17461606A EP 3457070 B1 EP3457070 B1 EP 3457070B1
Authority
EP
European Patent Office
Prior art keywords
cover
header
manifold
internal
internal plate
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.)
Active
Application number
EP17461606.0A
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German (de)
English (en)
Other versions
EP3457070A1 (fr
Inventor
Grzegorz Romanski
Maciej PEDRAS
Bartlomiej CISAK
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 Autosystemy Sp zoo
Original Assignee
Valeo Autosystemy Sp zoo
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
Application filed by Valeo Autosystemy Sp zoo filed Critical Valeo Autosystemy Sp zoo
Priority to EP17461606.0A priority Critical patent/EP3457070B1/fr
Priority to PCT/EP2018/075303 priority patent/WO2019057747A1/fr
Publication of EP3457070A1 publication Critical patent/EP3457070A1/fr
Application granted granted Critical
Publication of EP3457070B1 publication Critical patent/EP3457070B1/fr
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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
    • F28F9/0224—Header boxes formed by sealing end plates into covers
    • 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
    • F28F9/0229—Double end plates; Single end plates with hollow spaces
    • 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
    • F28F2275/08—Fastening; Joining by clamping or clipping
    • 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

Definitions

  • the present invention relates to a manifold for a heat exchanger assembly, especially to a high pressure manifold for automotive heat exchanger assemblies, and a method for manufacturing such a manifold.
  • a prior art manifold generally comprises a cover and a header applied and bent on the cover.
  • the cover comprises at least one channel defined therein.
  • the header comprises a series of through slots, which receive a series of flow ducts of a heat exchanger and are in fluid communication with the channel of the cover.
  • Cooperating surfaces of the header and the cover as well as an external surface of the header are bent in a direction opposite to a direction in which the flow ducts are inserted into the manifold.
  • EP 2090851 A1 discloses a manifold according to the preamble of claim 1.
  • One aim of the present invention is to provide a manifold for a heat exchanger assembly, which eliminates or at least significantly reduces the drawbacks of the prior art solution described above.
  • Another aim of the present invention is to provide a manifold for a heat exchanger assembly, which is more durable, easier to manufacture and more cost-effective.
  • a manifold for a heat exchanger assembly comprises a cover, which in turn comprises at least one channel defined therein.
  • the manifold further comprises a header applied on the cover.
  • the header comprises a plurality of slots.
  • the cover and the header are bent in a direction extending from the cover towards the header.
  • the manifold further comprises an internal plate sandwiched between the cover and the header and comprising a plurality of slots in fluid communication with the slots of the header and the at least one channel of the cover.
  • the internal plate is bent in the direction extending from the cover towards the header .
  • the cover includes an internal surface, which has a radius R isc prior to assembly of the manifold.
  • the header includes an internal surface, which has a radius R ish prior to assembly of the manifold.
  • the internal plate includes a first surface facing the internal surface of the header and a second surface facing the internal surface of the cover. Prior to assembly of the manifold the first surface of the internal plate has a radius R ip1 , the second surface of the internal plate has a radius R ip2 and R ish >R ip1 ⁇ R ip2 >R isc .
  • Another object of the present invention is a method for manufacturing a manifold for a heat exchanger assembly as defined in claims 6 and 7.
  • the manifold constructed according to the present invention is more robust compared to the prior art solutions. Additionally, elastic forces generated by tensioning the components of the manifold ensure that they are tightly kept together what in turn means that non-brazed voids/isles are not formed between surfaces to be brazed.
  • a heat exchanger assembly 1 comprises two manifolds 2 and a plurality of flat hollow flow ducts 3. Ends of the flow ducts 3 are received in corresponding slots provided in the manifolds 2.
  • a plurality of coolant turbulators 4 can be placed between the flow ducts 3 in such a way that one coolant turbulator 4 is situated between and in contact with two adjacent flow ducts 3.
  • one of the manifolds 2 is an inlet manifold, while the other is an outlet manifold.
  • one of the manifolds 2 can operate both as the inlet manifold and the outlet manifold, whereas the other is in fact an intermediate manifold. It means that the intermediate manifold receives a fluid to be cooled down from some flow ducts 3 and guides it back to the other flow ducts 3 so that an U-shaped flow path is created.
  • the other manifold 2 is configured to both receive a hot fluid from a vehicle and deliver a cool fluid back to the vehicle. Generally, all components of the manifold 2 are brazed to each other.
  • the manifold 2 comprises a header 21, an internal plate 22 and a cover 23.
  • the internal 22 plate is sandwiched between and is in tight contact with the header 21 and the cover 23.
  • the internal plate 22 functions as an interface between the header 21 and the cover 23.
  • the cover 23 can define therein at least one longitudinal channel 231 for a fluid to be cooled down.
  • the number of longitudinal channels 231 depends on whether the manifold 2 operates as the intermediate manifold (one longitudinal channel) or as the inlet/outlet manifold (two longitudinal channels).
  • the function of the longitudinal channel 231 is to distribute the fluid to be cooled down along the manifold 2.
  • the longitudinal channel 231 is open towards the internal plate 22.
  • the longitudinal channel 231 can also be open to longitudinal faces of the cover 23 or can end in a distance from the longitudinal faces of the cover 23. If the channel 231 opens to both longitudinal faces the manifold 2 can be provided with a plug 24 at each of its ends. The plugs 22 cover and close the ends of the manifold 2, thus ensuring that the manifold 2 is fluid-tight once assembled.
  • the header 21 and the internal plate 22 comprise a plurality of slots 211 and 221, respectively.
  • the number and the shape of the slots 211, 221 correspond to the number and the shape of the flow ducts 3.
  • the flow ducts 3 fit inside the slots 211, 221 and are in fluid communication with the longitudinal channel 231 of the cover 23.
  • the cover 23 is provided with a through port 233 that is in fluid communication with the at least one longitudinal channel 231 of the cover 23.
  • the manifold 2 operates as the intermediate manifold the cover 23 does not comprise the through port 233.
  • the manifold 2 operates as the inlet/outlet manifold the cover 23 is provided with two through ports 233, each being in fluid communication with one longitudinal channel 231.
  • the heat exchanger assembly 1 can be provided with two rows of the flow ducts 3, two rows of the slots 211 and two rows of the slots 221 in both manifolds 2, two separate longitudinal channels 231 in the first manifold 2, one longitudinal channel 231 in the second manifold 2 and two through ports 233 in the first manifold 2.
  • the second manifold 2 comprises no through ports 233.
  • the manifold 2 can further comprise a connection block 25 placed over and in fluid communication with each of the through ports 233 of the cover 23.
  • the header 21 is an U-shaped longitudinal element provided with one row of the slots 211.
  • the header 21, as well as the internal plate 22, is provided with a corresponding number of rows of the slots 211, in this case two.
  • the number of the longitudinal channels 231 of the cover 23 also corresponds to the number of the rows of the flow ducts 3 and the slots 211, 221, each longitudinal channel 231 being in fluid communication with one of the rows of the flow ducts 3 and the slots 211, 221.
  • the header 21 comprises two side walls 213, which are longer that the summarized length of the internal plate 22 and the cover 23 stacked together. Ends 214 of the side walls 213 are bent on ends 234 of the cover 23 to assemble all components of the manifold 2 into one unit and keep them together.
  • the header 21 has an external surface 216 and an internal surface 217.
  • the internal surface 217 faces the internal plate 22.
  • the external surface 216 and the internal surface 217 are both bent towards the flow ducts 3, namely the external surface 216 is convex and the internal surface 217 is concave when viewed in cross-section.
  • the internal surface 217 Prior to assembly of the manifold 2 the internal surface 217 has a radius R ish .
  • the internal plate 22 has first and second surfaces 223, 224.
  • the first surface 223 faces the internal surface 217 of the header 21.
  • the second surface 224 faces the cover 23.
  • the first and second surfaces 223, 224 are bent towards the flow ducts 3, namely the first surface 223 is convex and the second surface 224 is concave when viewed in cross-section.
  • the first surface 223 Prior to assembly of the manifold 2 the first surface 223 has a radius R ip1 , while the second surface 224 has a radius R ip2 .
  • the cover 23 has an internal surface 237 and an external surface 238.
  • the internal surface 237 faces the second surface 224 of the internal plate 22.
  • the internal surface 237 is bent towards the flow ducts 3, namely the internal surface 237 is convex when viewed in cross-section. Prior to assembly of the manifold 2 the internal surface 237 has a radius R isc .
  • the header 21, the internal plate 22 and the cover 23 are bent in a direction D1, which extends from the cover 23 towards the header 21 and through their centers, when viewed in cross-section. It means that physical points on the external surface 216, the first surface 223 and the internal surface 237 located at or near a transverse axis A of the manifold 2 are situated farther away, in respect of the dimension D1, than ends of the header 21, the internal plate 22 and the cover 23, respectively.
  • the direction D1 is opposite to a direction D2, in which the flow ducts 3 are to be inserted into the manifold 2.
  • the relationship referred to above secures physical contact between the header 21, the internal plate 22 and the cover 23 in their central area near the transverse axis A of the manifold 2. Then, a pressing force F is exerted on the components of the manifold 2 to bring them together and guarantee complete physical contact between corresponding brazing areas, namely between a brazing area 212 of the header 2 and a first brazing area 222a of the internal plate 22 as well as between a second brazing area 222b of the internal plate 22 and a brazing area 232 of the cover 23.
  • the ends 214 of the side walls 213 of the header 21, as discussed above, are bent at a bending angle ⁇ on the ends 234 of the cover 23 so that a bend 215 is created.
  • the bending angle ⁇ is defined as an angle between the extension of the wall 213 of the header 21 and the end 214 itself after bending.
  • the cover 23 can be provided at both its ends 234 with a recess 235 and a protruding edge 236 adjacent to the recess 235.
  • the protruding edge 236 of the cover 23 defines a precise bending line for the ends 214 of the side walls 213 of the header 21.
  • the recesses 235 receive the ends 214 of the side walls 213.
  • the bending angle ⁇ is in fact greater than the required minimum bending value of 90°, preferably greater than or equal to 100°, more preferably greater than or equal to 120°, for stable crimping purpose.
  • This way a stable configuration of the manifold 2 during CAB thermal treatment is ensured.
  • this ensures that the risk of loosening the connection between the header 21, the internal plate 22 and the cover 23, and thus the risk of creating gaps between them, is significantly reduced.
  • the internal plate 22 comprises two surfaces 223, 224 with two different radii R ip1 and R ip2 , respectively.
  • the internal plate 22 still has first and second surfaces 223, 224 but their radii are equal to each other, namely R ip1 equals R ip2 .
  • R ip1 R ip2
  • the manifold 2 is manufactured in the following way. First, the header 21, the internal plate 22 and the cover 23, as described above, are provided. At this stage, generally, the radius relationships defined above apply. Next, the header 21 is applied on the cover 23 and the internal plate 22 so that the internal plate 22 is sandwiched between the header 21 and the cover 23 and all these three elements are kept together. Also, the pressing force F is exerted on the header 21, the internal plate 22 and the cover 23 to bring all these elements to complete tight contact with each other at their corresponding brazing areas. At the end, the ends 214 of the header 21 are bent on the ends 234 of the cover 23 and the brazing process takes place.
  • the cover 23 can comprise at least one longitudinal channel 231.
  • the longitudinal channel 231 distributes the fluid to be cooled down, especially CO 2 , along the manifold 2.
  • the longitudinal channel 231 can be circular or oval in cross-section.
  • the longitudinal channel 231 is arranged in the cover 23 so that the largest dimension LD of the channel 231 in a direction B between two ends 234 of the cover 23 is contained within the cross-section of the channel 231.
  • an open side 231a of the channel 231 does not include the largest dimension LD of the channel 231.
  • the width of the open side 231a in the direction B is smaller than the largest dimension LD of the cover 23 in the same direction.
  • a protrusion 231b is formed at both edges of the longitudinal channel 231 and the protrusions 231b are separated by a distance that is smaller than the largest dimension LD of the channel 231.
  • the stresses arising from mechanical deformations due to the pressure of the fluid to be cooled down concentrate at an area C of the longitudinal channel 231 and not at the protrusions 231b.
  • the projections 231b are subjected to less stress compared to other parts of the longitudinal channel 231, which in turn makes the connection between the internal surface 237 of the cover 23 and the second surface 224 of the internal plate 22 more durable, especially in an area near the projections 231b, and increases the durability of the manifold 2.
  • the thickness of the cover 23 can be reduced because the cover 23 itself is more robust.
  • this configuration of the cover 23 ensures that the whole manifold 2 is very durable despite bending and tensioning of its components.
  • a bulge 239 is formed on the external surface 238 of the cover 23.
  • the position of the bulge 239 corresponds to and is a result of the position of the longitudinal channel 231.
  • the bulge 239 can take different shapes and enables easier attachment of the connection block 25 and/or other elements like hooks, brackets, etc.
  • the connection block 25 can be integrated in the bulge 239 itself.
  • the shape of the bulge 239 can be chosen to match the shape of surrounding components of a vehicle. This feature offers high flexibility in forming the longitudinal channel 231 and makes it possible to control and minimize an internal volume of the whole manifold 2.
  • the through port 233 for the connection block 25 is formed on the external surface 238 of the cover 23.
  • the through port 233 can be defined in the plug 24.
  • the longitudinal channel 231 opens to longitudinal faces of the cover 23, which are closed by the plugs 24.
  • One of the plugs 24, or both comprises at least on through port 233, which is in fluid communication with the longitudinal channel 231. This in turn means that the connection block(s) 25 is(are) placed over the through port 233 in the plug 24 and is(are) connected to the plug 24 itself, either directly or via additional intermediate tubes.

Claims (7)

  1. Collecteur (2) destiné à un ensemble échangeur (1) de chaleur, comprenant :
    un couvercle (23), qui comprend au moins un canal (231) défini dans celui-ci ;
    un répartiteur (21) appliqué sur ledit couvercle (23), ledit répartiteur (21) étant un élément longitudinal en forme de U comprenant une pluralité de fentes (211) ; et
    une plaque interne (22) prise en sandwich entre ledit couvercle (23) et ledit répartiteur (21) et comprenant une pluralité de fentes (221) en communication fluidique avec lesdites fentes (211) dudit répartiteur (21) et ledit canal ou lesdits canaux (231) dudit couvercle (23) ;
    caractérisé en ce que
    ledit couvercle (23), ladite plaque interne (22) et ledit répartiteur (21) sont courbés dans une direction (D1) s'étendant dudit couvercle (23) vers ledit répartiteur (21), le répartiteur (21) comprenant deux parois latérales (213), les extrémités (214) des parois latérales (213) étant recourbées sur les extrémités (234) du couvercle (23).
  2. Collecteur (1) selon la revendication 1, caractérisé en ce que ledit couvercle (23) comprend une surface interne (237), qui présente un rayon Risc avant l'assemblage dudit collecteur (2), en ce que ledit répartiteur (21) comprend une surface interne (217), qui présente un rayon Rish avant l'assemblage dudit collecteur (2), et en ce que ladite plaque interne (22) comprend une première surface (223) faisant face à ladite surface interne (217) dudit répartiteur (21) et une seconde surface (224) faisant face à ladite surface interne (237) dudit couvercle (23), et en ce qu'avant l'assemblage dudit collecteur (2), ladite première surface (223) de ladite plaque interne (22) présente un rayon Rip1, ladite seconde surface (224) de ladite plaque interne (22) présente un rayon Rip2 et Rish>Rip1≥Rip2>Risc.
  3. Collecteur selon l'une quelconque des revendications 1 et 2, caractérisé en ce que ledit couvercle (23) comprend une surface externe (238) et deux extrémités (234), ledit couvercle (23) étant muni sur ladite surface externe (238) et auxdites extrémités (234) de renfoncements (235) de telle façon que deux bords saillants (236) soient formés, adjacents auxdits renfoncements (235), lesdits renfoncements (235) recevant des extrémités (214) de parois latérales (213) dudit répartiteur (21).
  4. Collecteur selon la revendication 3, caractérisé en ce que lesdites extrémités (214) dudit répartiteur (21) sont recourbés sur ledit couvercle (23) suivant un angle (α) de courbure qui est supérieur à 90°, de préférence supérieur à 100°, idéalement supérieur à 120°.
  5. Collecteur selon l'une quelconque des revendications précédentes, caractérisé en ce que ledit canal ou lesdits canaux (231) dudit couvercle (23) présentent une plus grande dimension (LD), qui s'étend dans une direction (B) entre lesdites extrémités (234) dudit couvercle (23) et est incluse dans une section transversale dudit canal ou desdits canaux (231) de telle façon que deux protubérances (231b) sont formées sur les deux bords dudit canal ou desdits canaux (231), lesdites protubérances (231b) étant séparées par une distance plus petite que la plus grande dimension (LD) dudit canal ou desdits canaux (231).
  6. Procédé de fabrication d'un collecteur (2) destiné à un ensemble échangeur (1) de chaleur, comprenant les étapes consistant à :
    a : mettre en place un couvercle (23) comprenant au moins un canal (231) défini dans celui-ci, un répartiteur (21) formé comme un élément longitudinal en forme de U doté d'une pluralité de fentes (211) et une plaque interne (22) prévue pour être prise en sandwich entre ledit couvercle (23) et ledit répartiteur (21) et dotée d'une pluralité de fentes (221) ; ledit répartiteur (21), ladite plaque interne (22) et ledit couvercle (23) étant courbés chacun dans une direction (D1) s'étendant dudit couvercle (23) vers ledit répartiteur (21), le répartiteur (21) comprenant deux parois latérales (213) ;
    b : appliquer ledit répartiteur (21) sur ladite plaque interne (22) et ledit couvercle (23) de telle façon que ledit répartiteur (21), ladite plaque interne (22) et ledit couvercle (23) soient maintenus ensemble et que ladite plaque interne (22) soit prise en sandwich entre ledit répartiteur (21) et ledit couvercle (23), les parois latérales (213) du répartiteur (21) étant recourbées sur les extrémités (234) du couvercle (23) ; et
    c : braser ledit répartiteur (21), ladite plaque interne (22) et ledit couvercle (23) ensemble.
  7. Procédé selon la revendication 6, ledit couvercle (23) comprenant une surface interne (237), qui présente un rayon Risc avant l'étape b, ledit répartiteur (21) comprenant une surface interne (217), qui présente un rayon Rish avant l'étape b, et ladite plaque interne (22) comprenant une première surface (223) faisant face à ladite surface interne (217) dudit répartiteur (21) et une seconde surface (224) faisant face à ladite surface interne (237) dudit couvercle (23) et, avant l'étape b, ladite première surface (223) de ladite plaque interne (22) présentant un rayon Rip1, ladite seconde surface (224) de ladite plaque interne (22) présentant un rayon Rip2 et Rish>Rip1≥Rip2>Risc, et l'étape b comprenant également le fait d'exercer une force F sur ledit répartiteur (21), ladite plaque interne (22) et ledit couvercle (23) pour amener leurs zones de brasage correspondantes en contact complet.
EP17461606.0A 2017-09-19 2017-09-19 Collecteur destiné à un ensemble échangeur de chaleur et procédé de fabrication d'un tel collecteur Active EP3457070B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP17461606.0A EP3457070B1 (fr) 2017-09-19 2017-09-19 Collecteur destiné à un ensemble échangeur de chaleur et procédé de fabrication d'un tel collecteur
PCT/EP2018/075303 WO2019057747A1 (fr) 2017-09-19 2018-09-19 Collecteur pour ensemble échangeur de chaleur et procédé de fabrication d'un tel collecteur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17461606.0A EP3457070B1 (fr) 2017-09-19 2017-09-19 Collecteur destiné à un ensemble échangeur de chaleur et procédé de fabrication d'un tel collecteur

Publications (2)

Publication Number Publication Date
EP3457070A1 EP3457070A1 (fr) 2019-03-20
EP3457070B1 true EP3457070B1 (fr) 2020-08-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP17461606.0A Active EP3457070B1 (fr) 2017-09-19 2017-09-19 Collecteur destiné à un ensemble échangeur de chaleur et procédé de fabrication d'un tel collecteur

Country Status (2)

Country Link
EP (1) EP3457070B1 (fr)
WO (1) WO2019057747A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005088225A1 (fr) * 2004-03-17 2005-09-22 Showa Denko K.K. Collecteur de tête à échangeur thermique et échangeur thermique comprenant ledit collecteur
EP2090851A1 (fr) * 2008-02-15 2009-08-19 Delphi Technologies, Inc. Échangeur de chaleur doté d'une chambre de mélange
EP2372283B1 (fr) * 2010-03-23 2013-09-04 Delphi Technologies, Inc. Échangeur thermique avec plaque collectrice

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3457070A1 (fr) 2019-03-20
WO2019057747A1 (fr) 2019-03-28

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