EP0290339B1 - Wärmetauscher mit Flüssigkeitszirkulation, insbesondere für Kraftwagen, und mit Entgasungskanal - Google Patents

Wärmetauscher mit Flüssigkeitszirkulation, insbesondere für Kraftwagen, und mit Entgasungskanal Download PDF

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Publication number
EP0290339B1
EP0290339B1 EP88401080A EP88401080A EP0290339B1 EP 0290339 B1 EP0290339 B1 EP 0290339B1 EP 88401080 A EP88401080 A EP 88401080A EP 88401080 A EP88401080 A EP 88401080A EP 0290339 B1 EP0290339 B1 EP 0290339B1
Authority
EP
European Patent Office
Prior art keywords
conduit
heat exchanger
bundle
tube
manifold
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
EP88401080A
Other languages
English (en)
French (fr)
Other versions
EP0290339A1 (de
Inventor
Marco Broglio
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 SE
Original Assignee
Valeo SE
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 Valeo SE filed Critical Valeo SE
Publication of EP0290339A1 publication Critical patent/EP0290339A1/de
Application granted granted Critical
Publication of EP0290339B1 publication Critical patent/EP0290339B1/de
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
    • F28F9/0231—Header boxes having an expansion chamber
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/917—Pressurization and/or degassification

Definitions

  • the invention relates to a heat exchanger with circulation of liquid, in particular a radiator forming part of a cooling circuit of an internal combustion engine of a motor vehicle.
  • Such a heat exchanger of the type comprising a bundle of tubes in which the liquid circulates, at least one manifold mounted at one end of the bundle, an expansion chamber communicating with the manifold at its lower part and a degassing passage for liquid connecting the manifold to the expansion chamber, the manifold comprising at least one transverse wall situated above the level of the degassing passage.
  • a heat exchanger of this type is known in particular from FR-A 2 514 479.
  • This known heat exchanger comprises a bundle of tubes in which the liquid circulates, a first manifold box mounted at one end of the bundle, a second box manifold mounted at the other end of the bundle, an expansion chamber communicating with the second manifold box at its lower part and a liquid degassing passage connecting through the tube bundle the first manifold box to the expansion chamber, the second manifold comprising a transverse wall, here a transverse partition, located above the level of the degassing passage and allowing the fluid to circulate along a U-shaped path through the tubes of the bundle.
  • the degassing passage is carried out by a tube of the bundle situated at a level lower than that of the transverse wall opening directly into the expansion chamber.
  • the purpose of the degassing passage is to evacuate to the expansion chamber any air bubbles which are trapped in the coolant and in particular the air bubbles possibly present in the first box. collector.
  • the transverse wall is a transverse partition which is provided in the second manifold box, which divides this box into two compartments, namely a lower compartment and an upper compartment, and which thus forces the liquid to flow in one direction from the second manifold to the first manifold and in the other direction from the first manifold to the second manifold.
  • the liquid thus circulates in the bundle of tubes along a U-shaped course or circuit, also called "bi-circuit".
  • this degassing passage is relatively complex because it requires in particular a bent tube, one end of which must be in sealed communication with the expansion chamber.
  • the invention particularly aims to remedy the drawbacks of degassing passages of exchangers known in the prior art.
  • the invention provides for this purpose a heat exchanger with circulation of liquid, in particular for a motor vehicle, comprising a bundle of tubes in which the liquid circulates, at least one manifold mounted at one end of the bundle, an expansion chamber communicating with the manifold at its lower part and a liquid degassing passage connecting the manifold to the expansion chamber, the manifold comprising at least one transverse wall situated above the level of the degassing passage.
  • this degassing passage comprises, in combination, at least one tube of the bundle situated at a level lower than that of the transverse wall as well as a conduit which opens on the one hand into the chamber d expansion and on the other hand in the manifold, facing and at a distance from the mouth of the aforementioned bundle or tubes.
  • the tube or tubes forming part of the degassing passage consist of tubes of the bundle in their normal function of circulation of the liquid.
  • This degassing passage makes it possible to evacuate to the expansion chamber any gas bubbles which collect under the transverse wall of the manifold, that is to say the upper wall of said water box and this by a suction effect of the liquid circulating first through the tube (s) of the bundle and then through the conduit, the bubbles being sucked towards this conduit through the space formed between the conduit and the mouth of the tube (s) beam.
  • the transverse wall is a transverse partition located in the manifold by dividing the latter into two compartments.
  • this degassing passage makes it possible to effectively remove the bubbles which may eventually collect in the manifold.
  • the degassing passage comprises a single tube of the bundle, this tube being of generally cylindrical shape, and the duct then also has a generally cylindrical shape, the tube and the duct being axially aligned.
  • the internal diameter of the cylindrical duct that is greater than the external diameter of the mouth of the bundle tube.
  • the duct is located in the immediate vicinity of the transverse partition of the first collecting chamber, without however being attached to this transverse partition.
  • the duct forming part of the degassing passage depends on a longitudinal partition which separates. re the manifold and the expansion chamber and the conduit extends fully into the second manifold.
  • the duct is obtained from molding in a single piece with said longitudinal partition.
  • the invention further provides that the manifold, the expansion chamber and the longitudinal partition which separates them are obtained from molding in one piece.
  • the heat exchanger shown in FIGS. 1 and 2 comprises a bundle 10 of tubes with a generally horizontal arrangement, at the ends of which are mounted water boxes 12 and 14 into which the ends of the tubes of bundle 10 open out.
  • the water box 12 forms a first manifold 16 into which open the ends of the tubes of the bundle 10.
  • the water box 14 is divided by a longitudinal partition 18 into a second manifold 20 into which the corresponding ends of the tubes of the bundle 10 open, and an expansion chamber 22 which communicates at its lower part with the manifold 20 by a communication passage 24.
  • the expansion chamber 22 comprises, in the upper part, a nozzle which can form a filling orifice and which is closed by a plug 26 with calibrated overpressure and vacuum valves.
  • the water box 12 comprises, in the usual manner, a wall 28, advantageously produced by molding of a plastic material, having, in cross section, the general shape of a U and thus defining an open end.
  • the open end of the wall 28 is fixed to a collector or plate with holes 30 by means of a peripheral crimping part 32 (FIG. 2).
  • One of the ends of the tubes 34 which make up the bundle 10 and which are provided with cooling fins 36 pass through the holes of this collector in a sealed manner.
  • the other ends of the tubes 34 pass tightly through another manifold or plate with holes 38 on which is mounted the side wall 40 of the water box 14.
  • the latter is made in one piece by molding a plastic material and has a flared shape, the section of which increases progressively from the lower part of the water box to its upper part which includes the plug 26.
  • the water box 14 also comprises, coming from molding with it, a pipe 42 for entering the coolant, as shown by arrow F1, and a pipe 44 for leaving said liquid, as shown by arrow F2.
  • the water box 14 comprises, also coming from molding with it, a wall, here a transverse partition 46 having an end edge 48 which, after mounting of the water box 14 on the manifold 38, comes into tight abutment against said collector.
  • the transverse partition 46 constitutes a separating partition which divides the second manifold into two substantially equal compartments, namely an upper compartment 50 in communication with the inlet nozzle 42 and a lower compartment 52 in communication with the outlet nozzle 44.
  • a circulation of the coolant known as a U
  • the engine coolant enters the upper compartment 50 of the manifold 20 via the inlet pipe 42, circulates in the tubes of the upper half of the bundle 10 as indicated by the arrows F3 and gains the other manifold 16, then circulates in the opposite direction, as indicated by the arrows F4 in the tubes of the lower half of the bundle 10, gains the lower compartment 52 of the manifold 20 and leaves the exchanger through the pipe 44.
  • a degassing passage is provided to evacuate towards the expansion chamber 22. air bubbles that can be trapped by the coolant and circulate in the cooling system.
  • the degassing passage comprises, in the example considered, a tube 54 forming part of the bundle 10.
  • This tube 54 is located at a level lower than that of the transverse partition 46 of the second manifold 20 and thus serves to circulate the liquid from the first collecting box 16 to the second collecting box 20 and more particularly to compartment 52 of this second collecting box.
  • the tube 54 has at one end a mouth 56 of flared shape, as known in sbr which opens into the first manifold 16 and, at its other end, another mouth 58, also of flared shape, which opens into compartment 52, immediately below partition 46.
  • the degassing passage further comprises a conduit 60 of generally cylindrical shape which opens, through a first end 62, into the expansion chamber 22 and, through its other end 64, facing and at a distance from the mouth 58 of the tube 54, the conduit 60 being axially aligned with the tube 54.
  • the internal diameter of the cylindrical conduit 60 is greater than the external diameter of the mouth 58 so as to create a suction effect of the coolant which flows successively through the tube 54 and then through the conduit 60 to enter the cham expansion bre 22. Thanks to the space provided between the end 64 of the tube 60 and the mouth 58 of the tube 54, which can be of the order of a few millimeters, any air bubbles present under the partition 46 are sucked in by the circulating fluid.
  • the tube 54 plays here not only its normal role of circulating coolant, in the same way as the other tubes 34 of the lower part of the bundle, but also contributes to the degassing of the compartment 52 of the second manifold 20 and to the degassing of the first manifold 16.
  • the cylindrical duct 60 is located in the immediate vicinity of the transverse partition 46, without however being attached to this partition in order to allow any air bubbles present to more easily access the space provided between the conduit 60 and the mouth 58, over the entire periphery of the conduit. But it can be envisaged that the conduit 60 is attached to the partition.
  • the conduit 60 depends on the longitudinal partition 18 which separates the second manifold 52 and the expansion chamber 22 and it extends entirely in the second manifold 20.
  • the duct 60 is obtained by molding in one piece with the partition 18.
  • a deflector 66 depending on the longitudinal partition 18, is provided in the expansion chamber 22 opposite the 'mouth of the conduit 60 for directing the liquid and the air bubbles possibly present towards the upper part of the expansion chamber 22.
  • the deflector 66 is obtained by molding in one piece with the longitudinal partition.
  • the entire water box 14 can thus be obtained by molding in one piece.
  • a base 68 In the wall 40 of the water box 14 is also arranged a base 68 to allow the establishment of a level detector (not shown) inside the expansion chamber 22, this detector being located for example slightly above the median horizontal plane of the water box 14.
  • the heat exchanger of the invention operates as follows.
  • the coolant circulates from the inlet manifold 42 to the outlet manifold 44 in the manner previously described.
  • the air or gas bubbles carried by the liquid tend to collect in the upper part of the first manifold 16 and in the upper part of the compartment 52 under the partition 46.
  • the air or gas bubbles possibly present in the first manifold 16 are sucked by the tube 34 and by the conduit 60 and are then evacuated to the expansion chamber 22.
  • the air or gas bubbles possibly present in the compartment 52 are sucked by the conduit 60 and evacuated towards the expansion chamber 22.
  • degassing passage of the invention could consist of several tubes similar to tube 54, for example by two adjacent tubes, the conduit 60 then having an appropriate shape, for example a generally oval section.
  • the assembly of the exchanger of the invention is particularly easy to implement, since it suffices to mount the two water boxes 12 and 14 on the corresponding collectors 30 and 38 in the usual manner and that the various tubes making up the beam are all identical.
  • the present invention is not limited to the example described above but encompasses all variants.
  • the manifold can be devoid of a transverse separating partition.
  • the degassing passage is located at the top of the exchanger and more particularly the conduit 60 is located near the upper horizontal wall of the manifold 20.
  • the manifold 20 may be divided into three compartments by two transverse partitions, with each of the partitions being associated with a degassing passage.

Landscapes

  • 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)
  • Degasification And Air Bubble Elimination (AREA)

Claims (9)

1. Wärmeaustauscher mit Flüssigkeitszirkulation, insbesondere für Kraftwagen, enthaltend ein Rohrbündel (10), worin die Flüssigkeit zirkuliert, wenigstens einen Sammelkasten (20), der an einem Ende des Bündels (10) angebracht ist, eine Ausdehnungskammer (22), die mit dem genannten Sammelkasten (20) am unteren Teil (52) in Verbindung steht, und einen Entgasungskanal, der den Sammelkasten (20) mit der Ausdehnungskammer (22) verbindet, wobei der Sammelkasten (20) wenigstens eine oberhalb des Entgasungskanals angeordnete Querwand (46) aufweist, dadurch gekennzeichnet, daß der Entgasungskanal in Kombination wenigstens ein Rohr (54) des Bündels (10) enthält, welches tiefer liegt als die Querwand (46), sowie eine Leitung (60), die einerseits in die Ausdehnungskammer (22). und andererseits in den Sammelkasten (20) in einem Abstand zu und gegenüber der Mündung (58) des bzw. der vorgenannten Rohre (54) einmündet.
2. Wärmeaustauscher nach Anspruch 1, dadurch gekennzeichnet, daß der Entgasungskanal nur ein Rohr (54) des Bündels enthält, wobei dieses Rohr von allgemein zylindrischer Form ist, und daß die Leitung (60) von allgemein zylindrischer Form ist, während das Rohr (54) und die Leitung (60) axial fluchten.
3. Wärmeaustauscher nach Anspruch 2, dadurch gekennzeichnet, daß der Innendurchmesser der zylindrischen Leitung (60) größer ist als der Außendurchmesser der Mündung (58) des Rohrs (54) des Bündels.
4. Wärmeaustauscher nach Anspruch 2, wobei die Mündung (58) des Rohrs (54) des Bündels eine konisch erweiterte Form hat, dadurch gekennzeichnet, daß der Innendurchmesser der zylindrischen Leitung (60) größer ist als der Außendurchmesser der Mündung (58) im weitesten Teil.
5. Wärmeaustauscher nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Leitung (60) in unmittelbarer Nähe der Querwand liegt, ohne an dieser Querwand befestigt zu sein.
6. Wärmeaustauscher nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Leitung (60) an der Querwand befestigt ist.
7. Wärmeaustauscher nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Leitung (60) an einer Längstrennwand (18) hängt, die den Sammelkasten (52) und die Ausdehnungskammer (22) voneinander trennt, und daß sich die Leitung (60) vollständig in den Sammelkasten (20) erstreckt.
8. Wärmeaustauscher nach Anspruch 7, dadurch gekennzeichnet, daß die Leitung (60) aus einem Stück mit der Längstrennwand (18) gepreßt ist.
9. Wärmeaustauscher nach einem der Ansprüche 7 und 8, dadurch gekennzeichnet, daß die Ausdehnungskammer (22), der Sammelkasten (20), die Längstrennwand (18). und die Leitung (60) aus einem Stück gepreßt sind.
EP88401080A 1987-05-05 1988-05-04 Wärmetauscher mit Flüssigkeitszirkulation, insbesondere für Kraftwagen, und mit Entgasungskanal Expired - Lifetime EP0290339B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8706327 1987-05-05
FR8706327A FR2614979B1 (fr) 1987-05-05 1987-05-05 Echangeur de chaleur a circulation de liquide, en particulier pour vehicule automobile, comprenant un passage de degazage de liquide

Publications (2)

Publication Number Publication Date
EP0290339A1 EP0290339A1 (de) 1988-11-09
EP0290339B1 true EP0290339B1 (de) 1990-09-26

Family

ID=9350791

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88401080A Expired - Lifetime EP0290339B1 (de) 1987-05-05 1988-05-04 Wärmetauscher mit Flüssigkeitszirkulation, insbesondere für Kraftwagen, und mit Entgasungskanal

Country Status (7)

Country Link
US (1) US4846265A (de)
EP (1) EP0290339B1 (de)
BR (1) BR8802067A (de)
DE (1) DE3860690D1 (de)
ES (1) ES2017793B3 (de)
FR (1) FR2614979B1 (de)
MX (1) MX168116B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6123144A (en) * 1997-04-15 2000-09-26 Cummins Engine Company, Inc. Integrated heat exchanger and expansion tank

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4425440A1 (de) * 1994-07-19 1996-01-25 Valeo Motorkuehlsysteme Gmbh Querstromkühler mit Entlüftung
GB2303438A (en) * 1995-07-19 1997-02-19 Llanelli Radiators Ltd Vehicle heat exchanger vent arrangement
US6019171A (en) * 1998-11-18 2000-02-01 General Motors Corporation Down flow, two pass radiator with automatic air venting means
BRPI1007042B1 (pt) * 2009-01-25 2020-08-04 Alcoil Usa Llc Trocador de calor
US8888898B1 (en) 2012-07-30 2014-11-18 Google Inc. Vacuum filling and degasification system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3623462A (en) * 1969-12-30 1971-11-30 Modine Mfg Co Radiator system for internal combustion engine
FR2514484B1 (fr) * 1981-10-12 1987-02-13 Valeo Boite a eau pour un echangeur de chaleur a circulation de liquide comprenant un passage de degazage du liquide et echangeur de chaleur comprenant cette boite a eau
FR2514479B1 (fr) * 1981-10-13 1987-05-07 Valeo Echangeur de chaleur a circulation de liquide, en particulier pour un vehicule automobile
FR2536522A1 (fr) * 1982-11-18 1984-05-25 Valeo Boite a eau comprenant un passage de degazage et echangeur de chaleur comprenant une telle boite a eau

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6123144A (en) * 1997-04-15 2000-09-26 Cummins Engine Company, Inc. Integrated heat exchanger and expansion tank

Also Published As

Publication number Publication date
FR2614979A1 (fr) 1988-11-10
US4846265A (en) 1989-07-11
EP0290339A1 (de) 1988-11-09
FR2614979B1 (fr) 1990-06-29
BR8802067A (pt) 1988-11-29
DE3860690D1 (de) 1990-10-31
MX168116B (es) 1993-05-04
ES2017793B3 (es) 1991-03-01

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