EP1649231B1 - Rohrverschluss für ein element eines hydraulischen kreises, insbesondere für einen wärmetauscher - Google Patents

Rohrverschluss für ein element eines hydraulischen kreises, insbesondere für einen wärmetauscher Download PDF

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Publication number
EP1649231B1
EP1649231B1 EP04767810A EP04767810A EP1649231B1 EP 1649231 B1 EP1649231 B1 EP 1649231B1 EP 04767810 A EP04767810 A EP 04767810A EP 04767810 A EP04767810 A EP 04767810A EP 1649231 B1 EP1649231 B1 EP 1649231B1
Authority
EP
European Patent Office
Prior art keywords
tube
endpiece
branches
heat exchanger
flared collar
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
EP04767810A
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English (en)
French (fr)
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EP1649231A2 (de
Inventor
Jean-Louis Laveran
Jérôme GENOIST
Carlos Da Silva
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 Systemes Thermiques SAS
Original Assignee
Valeo Systemes Thermiques SAS
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
Priority claimed from FR0309323A external-priority patent/FR2858399B1/fr
Application filed by Valeo Systemes Thermiques SAS filed Critical Valeo Systemes Thermiques SAS
Priority to PL04767810T priority Critical patent/PL1649231T3/pl
Publication of EP1649231A2 publication Critical patent/EP1649231A2/de
Application granted granted Critical
Publication of EP1649231B1 publication Critical patent/EP1649231B1/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
    • 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
    • F28D1/05358—Assemblies of conduits connected side by side or with individual headers, e.g. section type 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
    • F28F9/02—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

Definitions

  • the invention relates to the field of heat exchangers, in particular for the equipment of motor vehicles.
  • a tube endpiece arranged to be mounted at one end of a fluid circulation tube to form a hydraulic circuit element, the endpiece having two branches arranged to be applied against two opposite faces of the tube and wherein one of the legs has at least one boss with a perforation for establishing a fluid communication passage, corresponding to the preamble of claim 1.
  • a circuit element of this type and heat exchangers which include such elements have many advantages.
  • a heat exchanger may consist of a stack of different circuit elements.
  • Another advantage of the known circuit elements is that they allow a reduction in the size of the heat exchanger by optimizing the effective surface from the point of view of the heat exchange, by replacing the collector boxes with less bulky tips.
  • circuit elements can be delivered equipped with their tips, which facilitates the assembly of the heat exchanger. This eliminates the mechanical function of introducing tubes into drilled collectors. Just assemble the tubes with tips whose dimensions are the same as those of the tubes. Then, the circuit elements are stacked. There is therefore a great simplicity of assembly and manufacture.
  • Another advantage of this known solution is the possibility of producing a heat exchanger comprising tubes of different lengths, which makes it possible to adapt the shape of the exchanger to the space available in the vehicle in question.
  • the boss comprises a flat bottom in which is formed the fluid communication passage, the latter being formed of a circular hole.
  • the diameter of this through hole is necessarily limited. It must be smaller than the diameter of the flat bottom in which the communication passage is laid out. This restriction of the through hole, that is to say of the fluid passage section, generates losses of charge.
  • Such pressure losses are detrimental to the performance of the heat exchanger, especially in the case where the fluid must circulate at low pressure and at a high flow rate, as is the case of an engine cooling radiator. of a motor vehicle, a heating radiator of the passenger compartment of a motor vehicle, or an evaporator of an air conditioning circuit.
  • the object of the invention is in particular to overcome the aforementioned drawbacks.
  • the invention also aims at producing circuit elements, in particular for a heat exchanger, comprising a tube and at least one tube endpiece as defined above.
  • the invention proposes for this purpose a tube end as defined in the introduction, wherein the boss with its perforation is stamped to form a flared collar having an inverted annular edge providing a junction area.
  • the perforation is formed, not in a flat bottom of the boss, but in a flared collar which has an inverted annular edge.
  • Such a flared collar which may also be called “inverted collar”
  • the tip of the invention thus finds application, especially in the case of heat exchangers traversed by a circulating fluid at low pressure and high flow.
  • Said boss comprises, for example, a first end, intended to be close to the tube, and a second end, opposite to the first end, at which said collar is located.
  • Said junction zone is thus remote from the tube and extends, in particular, in a plane parallel to the plane of said tube, provided flat.
  • each of the branches of the mouthpiece comprises two parallel outer edges, so that the two parallel edges of one branch can be brazed respectively to the two parallel edges of another branch while encircling the end of the tube.
  • edges of the branches of the tip are folded edges to allow brazing on two slices of the sheet. This variant is particularly suitable in the case where the fluid circulates at low pressure.
  • edges of the branches of the tip are flat edges to allow brazing on two sides of the sheet. This results in a more resistant soldering which is of particular interest in the case where the fluid circulates at high pressure.
  • At least one of the edges of one of the branches is extended by a lug capable of being folded against the other leg to hold the branches against the end of the tube for soldering. This provides a temporary fixation of the tip on the tube. This solution makes it possible to produce tubes already pre-equipped with their tips and which can then be assembled by soldering.
  • a first variant then provides that each of the edges of one of the branches of the tip is extended by a tab, which is arranged to be folded against the other branch, the junction areas of each branch being, for example, symmetrical relative to a plane of symmetry of the tip.
  • a second variant consists in that a first edge of a first branch is extended by a tab arranged to be folded against a first edge vis-à-vis a second branch whose second edge is extended by a tab arranged to be folded against the second edge of said first branch.
  • the two branches of the tip are symmetrical.
  • the two branches each comprise a boss forming a flared collar.
  • one of the branches comprises a flared collar boss, while the other branch comprises a flat bottom boss, provided with a perforation.
  • one of the branches of the mouthpiece comprises a flared neck boss, while the other leg comprises a flat, non-perforated boss.
  • the flared collar has an annular edge. This one can be plane. It is also advantageous for this annular edge to be slightly frustoconical to form a fillet having an angle of less than 2 °.
  • a particularly advantageous configuration of the tip provides that each of the branches has on its entire surface against a face of the tube a reduced sheet thickness, the reduction in sheet thickness thus forming an internal shoulder on which the end of the tube introduced into the nozzle can abut.
  • this stop maintains the tube in the axial position the time to achieve brazing of the tube assembly and tip.
  • the two branches are connected by a portion of the folded sheet metal strip forming a connecting tongue, which has the primary function of maintaining the two associated branches before brazing.
  • the connecting tongue is provided opposite to said one end of the fluid circulation tube, preferably disposed substantially in the axis of the tube.
  • This configuration has the advantage of maintaining the symmetry of the tip.
  • the connecting tongue is provided joining two respective outer edges of the two branches.
  • the invention in another aspect, relates to a hydraulic circuit element for a heat exchanger, which comprises at least one tube having two ends and at least one end at one of said ends of the tube, said end being as defined above .
  • the tube is a flat tube having a through-hole formed near one end of the tube, this end being fitted completely into the endpiece so that the through hole is opposite the perforation of the collar. flared. Thanks to the realization of a flared neck, the perforation has a passage section substantially equal to that of the through hole in the end of the tube, which is favorable to limit the pressure drop.
  • This application is suitable for the case of a flat tube having a plurality of parallel internal channels for the flow of fluid, such as an extruded flat tube.
  • the tube is a flat tube and the end of the tube is partially fitted into the tip so that it stops before perforation of the flare collar.
  • the tip provided with the internal shoulder defined above allowing the end of the tube to abut on this shoulder. The positioning of the tube in the tip and its maintenance before soldering are thus assured.
  • This embodiment is suitable for the case where the flat tube has two parallel internal channels for the circulation of the fluid, as is the case of a tube obtained from a folded sheet. It is also adapted to the case where the flat tube has a multiplicity of parallel internal channels for the circulation of the fluid.
  • the invention relates to a heat exchanger, in particular for a motor vehicle, comprising a stack of circuit elements as defined above.
  • the heat exchanger further comprises a tubular element having at one of its ends an annular portion of a diameter adapted to surround the flared neck left free of at least one of the tube ends. located at the ends of the stack.
  • the tubing element makes it possible in particular to ensure the junction between the heat exchanger and the remainder of the fluid circulation circuit.
  • the annular portion has recess points of its circumference making a crimping of the tubular element on the flared collar, advantageously also distributed around the periphery of the annular portion.
  • the annular portion extends externally by holding tabs intended to be folded under the flared collar.
  • the heat exchanger further comprises a tubular member having at one of its ends an annular portion of a diameter adapted to be housed in an annular orifice inside the flared collar. This makes it possible to ensure the junction between the tubing element and the collar flared by the inside of the collar.
  • the tubular element further comprises, adjacent to the annular portion, a flange for abutting against said junction area of the flared collar. It is then possible to force force the annular portion until the collar comes into abutment against the junction area of the flared collar, this before soldering.
  • the tubular element externally has a thread in the vicinity of one of its ends.
  • FIG. 1 An external perspective view of a heat exchanger according to the publication FR-A-2,834,336 already quoted and on the figure 2 a sectional view of its right side.
  • This exchanger is constituted by a stack of circuit elements 20 each of which consists of at least one tube 22 having two ends. A tip 24 is attached to each end of the tube 22. The tips 24 are disposed in the longitudinal axis of the tubes.
  • the end pieces 24 each comprise two bosses 26, also called cups, of frustoconical shape.
  • Each boss or bowl 26 has a flat bottom 28.
  • the flat bottoms 28 of the bosses of a tip of a circuit element 20 bear against the flat bottoms of the bosses of the adjacent circuit elements.
  • the various circuit elements which constitute the heat exchanger represented on the figure 1 are supported on each other via the flat bottoms 28 of the bosses 26 of their respective ends.
  • the flat bottoms 28 can be full, that is to say do not include any perforation. In this case, they do not allow any circulation of the fluid that circulates in the tubes 22 of the exchanger between two circuit elements.
  • the flat bottoms 28 may comprise perforations 27, arranged facing each other, so that the fluid can pass from one circuit element to another.
  • the closed flat bottoms 28 are schematized by a small circle 28a shown in hatched perspective, and the perforated flat bottoms 28, allowing the passage of the fluid, by a small circle 28b without hatching.
  • the fluid enters the exchanger of heat at the upper right of the exchanger, as shown schematically by the arrow 30.
  • the flat bottom of the boss 26 located opposite the fluid inlet in the exchanger being closed (closed bottom 28a) the first fluid is moves from right to left (arrow 32) and travels the upper tube 22 of the exchanger.
  • the fluid reaches the nozzle 24 located on the left side of the upper tube 22 of the exchanger.
  • the upper boss 26 has a flat bottom 28 closed, while the lower boss of the nozzle 24 has a flat bottom 28b open.
  • the fluid can thus pass from the upper circuit element 20 to the immediately lower circuit element as shown by the arrow 34.
  • the first fluid then travels the second circuit element 20 from left to right according to the Figures 1 and 2 .
  • At the right end of the second circuit element 20 it passes into the lower circuit element 36 arrow through perforations 28b provided in the flat bottom bosses.
  • the fluid thus makes a series of trips back and forth in the tubes of the circuit elements from right to left and from left to right. He leaves the exchanger on the left side of the latter, as shown by the arrow 38.
  • the fluid is in heat exchange relation with another fluid which circulates conventionally perpendicularly to the bundle of the tubes 22.
  • the corrugated inserts 40 may be arranged between the tubes 22 of the exchanger heat.
  • the tip 24 is made by stamping and folding a metal strip, preferably aluminum. Embossing allows for the two bosses 26 and the perforations 27 of the flat bottom 28, if these perforations exist.
  • a stamp 42 constitutes the bottom or end of the tip. It prevents the fluid from escaping in the axial direction of the tube with assembly of the nozzle on the end of a tube 22.
  • the tip is assembled, for example by clipping, fitting or crimping on a tube 22 before soldering . Punctures 44 and 46 facilitate the brazing of the tip on the end of the tube 20.
  • the tip 24 of the figure 3 is formed of a folded sheet metal strip forming two branches 31 of generally rectangular shape which are attached to the bottom 42. These two branches, after folding of the sheet metal strip, are substantially parallel to each other and are intended to be applied against two opposite flat faces 48 and 50 of a tube 22 ( Figures 4 and 5 ).
  • a tube 22 which is a multi-channel tube. It comprises seven channels 52 separated by six partition walls 54.
  • Such a tube is intended, for example, to contain a fluid under pressure.
  • the partition walls 54 reinforce the tube and prevent it from bulging under the pressure of the fluid.
  • this tube has a circular through hole 56 at one or both ends thereof. The hole 56 opens on the two opposite faces 48 and 50 of the tube 22.
  • the tip 24 is fitted completely on the end of the tube 22 so that the hole 56 is located substantially opposite the perforations 27 of the bosses 26.
  • the communication between the tube and the tip is effected through the circular through holes 50.
  • the tip is simply clipped to the free end of the tube 24 and the first fluid out of the tube where it enters through the end of the latter.
  • the tube does not have a circular through hole 50.
  • the perforation 27 has a diameter d1 smaller than the diameter d2 of the flat bottom 28 of the boss 26.
  • This diameter d1 is also smaller than the diameter d3 of the through hole 56 of the tube 22. This results in a restriction of the passage section which produces loss of load prejudicial to the proper functioning of the heat exchanger.
  • the invention makes it possible to avoid this drawback by producing a tip 60, a first embodiment of which is shown in FIGS. Figures 6 and 7 .
  • the tip 60 is similar to the tip 24 of the prior art in that it is formed of folded sheet metal strip to form two branches 62 arranged to be applied against two opposite faces 48 and 50 of a tube 22 as described above. These two branches 62 are connected by a bottom 64 which closes the end of the tube.
  • Each of the legs 62 includes at least one boss 66 provided with an annular perforation 68 for establishing a fluid communication passage.
  • the boss 66 here has the particularity of being stamped to form a flared collar having an inverted annular edge 70 providing a junction zone. Subsequently, the reference 66 designates the flared collar.
  • This flared collar 66 may also be called a flanged collar provided that the flange-shaped annular edge 70 completely surrounds the perforation 68.
  • the inside diameter d4 of the perforation 68 (FIG. figure 7 ) is much greater than the diameter d1 of the perforation 27 in the case of the tip of the art previous ( figure 5 ).
  • This diameter of the stamping may be substantially equal to the diameter d3 of the through hole that comprises the tube (not shown) introduced into the tip of the Figures 6 and 7 .
  • the branches 62 have parallel outer edges 72 so that the parallel edges of one branch can be brazed respectively to the parallel edges of another branch by surrounding the end of the tube.
  • the edges of the branches are folded, which allows brazing on two slices of the sheet.
  • the edges of one of the branches are extended by two tabs 74 may be folded against the other branch to hold the two branches against the end of the tube. This ensures a temporary attachment of the tip on the end of the tube for brazing.
  • the two branches 62 of the nozzle each comprise a boss provided with a flared collar 66.
  • the ends of three circuit elements each consisting of a tube 22 at the end of which is mounted a tip 60 which is provided with two flared collars 66, which ensures the passage of the fluid of one tube 22 to another.
  • the tubes 22 are multi-channel tubes advantageously obtained by extrusion.
  • FIG 9 represents another tip 60 according to the invention comprising two flared collars 66.
  • the flared collars 66 are respectively from the two branches 62.
  • Each of the two branches has two parallel edges 76 which are made in the form of flat edges to allow brazing on both sides of the sheet. This results in a stronger brazing than in the case of the embodiment of the Figures 6 and 7 where brazing takes place on slices of the sheet.
  • the parallel edges 76 are joined by an edge 77 of semicircular shape, which allows to form two U-shaped edges which, once assembled, completely close the end of a tube.
  • the bottom 42 is here a simple folded tongue connecting the edges 77 of semicircular shape of the two branches 62.
  • FIG 10 a sectional view of the tip 60 of Figures 9 and 10 and a tube 22 which is introduced into the mouthpiece.
  • This tube 22 has no through-hole and its free end 78 stops at the respective perforations of the collars 66. As a result, the fluid can enter or leave the tube only by its end 78.
  • This embodiment is particularly suitable in case the tube 22 is a folded tube as shown in the figure 11 .
  • This tube 22 is formed by folding a sheet 80 to define two folded edges 82 to form a spacer, as well as two channels 84 for fluid circulation.
  • the figure 12 is a side view of a tip similar to that of Figures 9 and 10 . It can be seen that the annular edge 70 of the mouthpiece (see the detail of the figure 13 ) is weakly frustoconical to form a fillet having an angle ⁇ less than 2 ° and a soldering zone 86 extending over a length L greater than 1 mm. As a result, when two collars are assembled, their respective annular edges 70 ( figure 14 ) delimit a brazing fillet 88 in the angle formed between the two collars, which is favorable for obtaining a good solder connection.
  • the annular edge 70 can be made plane.
  • the tip comprises two flared collars 66 symmetrical.
  • end caps comprising, on one side a flared neck boss, and on the other side a flat bottom boss, possibly provided with a perforation.
  • a part of a heat exchanger comprising circuit elements according to the invention. It comprises tips 60 with two flared necks and a particular tip 60A which comprises, on one side, a flared collar 66 and, on the other side, a boss 90 flat bottom, as described in the French patent application supra.
  • the boss 90 has a closed bottom and thus makes it possible to make a partition.
  • This boss 80 is intended to be placed at the end of the heat exchanger and to bear against an end plate 92.
  • FIG 17 schematically shows a method of manufacturing a tip according to the invention.
  • This tip is made by stamping an initially flat sheet, usually based on aluminum.
  • the bottom 64 is made which extends between the two branches 62.
  • two cup-shaped bosses 94 are made in the branches 62.
  • bosses 94 are further deformed so that they have a substantially hemispherical shape.
  • respective perforations 68 are formed in the bosses 94.
  • a fifth pass P5 the bosses 94 are raised and perforated to form two tubular ends 96.
  • the figure 18 illustrates the embodiment of a tip 60 A as described above. It is found that, from the fourth pass, the boss 94 on the right is not perforated. This boss 94 is then deformed to form a flat-bottom boss 80 as shown previously ( Figures 15 and 16 ).
  • the figure 19 is a graph which shows the pressure drop variations P of a fluid, in this case a refrigerant, as a function of the flow rate Q, respectively for a tip of the prior art (curve C1) and for a nozzle conforming to the invention (curve C2). It is noted that the pressure drop for the tip according to the invention, comprising a flared or inverted collar, is lower than in the case of the tip of the prior art.
  • circuit elements of the invention make it possible to produce different types of heat exchanger formed by a stack of circuit elements 20 which communicate with each other via the tips 60 to allow a passage of fluid between the circuit elements.
  • the Figures 20 to 23 are perspective views, variants of the tip 60.
  • the tip 60 of the figure 20 has two flared collars 66 respectively from the two branches 62 folded against each other to form the tip 60.
  • one of the two parallel edges 76 is extended by a tab 174 provided to be folded against the other branch.
  • the tabs 174 thus make it possible to hold the two branches 62 against the end of the tube thus ensuring a temporary holding of the tip on the end of the tube while waiting for the soldering operation, which carries out the final fixing.
  • the edge 76 of the branch 62 bearing against the edge 76 extended by the tab 174 of the other branch 62 is without it tab.
  • the tabs 174 are thus folded on either side of the median plane of the tip 60 parallel to the two branches 62.
  • a connecting tongue 42 constituted by a portion of the sheet metal strip forming the two branches 62.
  • the connecting tongue 42 connects the two branches 62 before they are folded.
  • the tongue 42 is folded, at the same time that the branches 62 are folded against each other, so as to form a loop.
  • the connecting tongue 42 connects a portion of two edges 76 bearing against each other and is therefore located on the side of the tip 60. It is understood that the tongue link 62 can be indifferently placed on one or the other side of the tip 60.
  • the connecting tongue 42 is of identical shape to the link tab shown on the figure 20 and is disposed towards the bottom of the nozzle 60, substantially in the axis of a tube intended to be introduced into the nozzle 60.
  • the connecting tongue 60 thus connects the edges 77 of semicircular shape supporting the against each other and which form the bottom of the tip 60.
  • the tip 60 is perfectly symmetrical with respect to a median plane orthogonal to the plane of the branches 62.
  • the tip 60 provided with a corresponding tube may be disposed in a heat exchanger without it it is necessary to be concerned about its orientation with respect to other circuit elements.
  • the figure 22 illustrates a configuration of the tip 60 in which, the connecting tongue 42, disposed towards the bottom of the end piece 60 and connecting the edges 77 of semicircular shape, is flattened so that one of its branches comes from in contact with the other.
  • This configuration is particularly advantageous in the case where it is desired to cut the connecting tongue 42 after soldering: once the two branches 62 are permanently held against each other by the soldering operation, the connecting tongue 42 is no longer useful.
  • the figure 23 shows that the flattened connection tongue can be, similarly to the case illustrated by the figure 20 , disposed on one of the sides of the end piece 60 connecting two edges 72 bearing against each other. It is understood that such a connecting tongue 42 can be arranged indifferently on one or the other side of the end piece 60.
  • the figure 24 again illustrates the tip 60 of the figure 9 in which is introduced a tube 122 with several longitudinal channels 52 for the circulation of the fluid, obtained for example by extrusion.
  • the tube 122 with several channels is a non-perforated tube.
  • the figure 25 shows that the multi-channel tube 122 is introduced into the nozzle 60 so that the inserted end is upstream of the orifice corresponding to the flared collar 66.
  • the tip 60 has a reduction in thickness 124, over the entire width of each of the two branches, on an area extending upstream of the orifice corresponding to the flared collar 66 to the free end of each of the branches 62.
  • the reduction of thickness 124 thus forms an internal shoulder 126 on which, at the introduction, the multi-channel tube 122 abuts thus offering both the correct positioning of the tube and its maintenance until the brazing operation, which ensures the final fixing of the end 60 on the multi-channel tube 122.
  • the inner shoulder 126 may be provided, and such an arrangement of the tube in the endpiece 60 used, with two-channel tubes obtained by folding such that tube 22 of the figure 11 .
  • circuit elements consisting of a tube at the end of which is mounted a tip, are associated to form a part of a heat exchanger.
  • the junction areas flared collars 66 of a tip of a circuit element are based on the junction area of a flared collar of the two adjacent ends.
  • the tip of the end circuit elements has a free flared collar which provides a junction area on which can connect tubing elements, including tubing elements intended to make the junction between the exchanger of heat and the rest of the circuit in which the fluid circulates.
  • the figure 26 illustrates a first embodiment of a first tubular element 130, provided in the form of a part of revolution having a first cylindrical connecting portion 132 extended by a second connecting portion 134 also cylindrical larger diameter.
  • the figure 26 is to be considered in relation to the figure 30 , which is a schematic partial sectional view of the first tubular element 130 according to one of its diameters.
  • the first connecting portion 132 of the tubing member 130 has an inner diameter near the outer diameter of the flared collar 66 of the tip of a free end circuit element.
  • the flared collar 66 of the end circuit element can be housed inside the first connecting portion 132 of the tubular element 130.
  • the surface forming the rim of the flared collar 66 pressees on the inner surface of the first connecting portion 132 ensuring the positioning of the tubing member 130 on the tip 60. It is possible to choose different adjustments between the inner diameter of the first connecting portion 132 and the collar flared 66 according to whether it is desired that the tubing element is mounted in force or not.
  • the first connecting portion 132 of the tubing element 130 is of a height selected so as to surround the entire flared collar 66 from the outer surface of the branch 62 to the junction zone 70.
  • crimping points 136 In the vicinity of the end free of the first connecting portion 132 are made crimping points 136, in the form of a local depression of the periphery of the first connecting portion 132, so as to place a portion of this connecting portion under the flared collar 66 , as can be seen on the left side of the figure 30 . It is clear that these crimping points 136 are made after the fitting of the tubing element 130 on the flared collar 66 and are intended to ensure the attachment of the tubing element 130 to the flared collar 66.
  • the crimping 136 are provided regularly spaced around the entire periphery of the first connecting portion 132. For example, it is possible to provide three crimping points 136 spaced each 120 ° from each other.
  • the second connecting portion 134 of the tubing element 130 can serve directly as a junction with the rest of the circulation circuit fluid in which is integrated the heat exchanger or receive a flange for connecting the rest of the circuit and the tubing element 130. According to the configuration of the flange or the adjacent element of the circuit, the second connecting portion 134 may or may not be machined (totally or partially) so as to have a suitable connecting portion.
  • the figure 27 illustrates a second embodiment of a tubular element.
  • a second tubular element 140 is provided in the form of a generally cylindrical piece of revolution having a central portion 142 connected to a first connecting portion 144 intended to join the heat exchanger, and to a second connecting portion 146 which will be connected to the remainder of the fluid circulation circuit in which is integrated the heat exchanger.
  • the second connecting portion 146 has a generally frustoconical shape whose large and small diameters are substantially larger than the diameter of the central portion 142.
  • the second connecting portion 146 is thus in the form of a collar, which is flares from the end of the tubing member to the central portion 142, on which can be fitted a fluid circuit element, for example a rubber hose.
  • the first connecting portion 144 is in the form of a cylindrical portion of slightly larger diameter than the diameter of the central portion 142.
  • the cylindrical portion of the first connecting portion 144 is extended axially by tabs arranged at angular intervals on the perimeter of the first connecting portion 144.
  • the figure 27 is to be considered in relation to the figure 31 , which represents a partial schematic section of the first connecting portion 144 along one of its diameters.
  • the inside diameter of the first connecting portion 144 is chosen so as to fit exactly the outer periphery of the flared collar 66.
  • the second tubular element 140 is positioned on the flared collar 66 and, depending on the adjustment chosen, can also be held in position.
  • the legs 148 extending the first connecting portion 144 are then folded under the flared collar 66, as indicated on the left side of the figure 31 , ensuring the attachment of the second tubing member 140 flared collar 66.
  • a permanent fixation can be obtained by soldering.
  • the figure 28 shows a variant of the second tubing element 140 of the figure 27 in the form of a third tubular element 150 of generally cylindrical shape and which has a first connecting portion 144 identical to the first connecting portion 144 shown in FIG. figure 27 and described above.
  • the third tubing element 150 is devoid of the second connecting portion 146.
  • a central portion 152 similar to the central portion 142 of the figure 27 is in the form of a threaded cylindrical portion of which one of the ends is free, while the other end is extended by the first connecting portion 144.
  • the threaded central portion 152 of the third tubing element 150 allows to connect an element of the fluid circuit, in which is integrated the heat exchanger, provided with a suitable screw element.
  • a fourth tubular element 160 is in the form of a generally cylindrical piece of revolution of general shape with a cylindrical central portion 162 extending at one end by a second connecting portion 166 of identical shape to the second connecting portion 146 in flange illustrated on the figure 27 and described above.
  • the second connecting portion 166 is adapted to receive an adjacent element of the fluid circulation circuit, for example a hose.
  • the central portion 162 is extended by a first connecting portion 164 which will now be described.
  • the figure 29 is to be considered in relation to the figure 32 which illustrates a section of the first connecting portion 164 along one of its diameters.
  • the first connecting portion 164 has a shoulder 168 of greater diameter than the outer diameter of the flared collar 66 and obtained for example by embossing.
  • the shoulder 168 is extended by a cylindrical fitting portion 170 of outer diameter substantially equal to the inside diameter of the orifice corresponding to the flared collar 66.
  • the fourth tubular element 160 can thus be inserted in force so as to accommodate the portion cylindrical fitting 170 inside said orifice until the shoulder 166 is held against the junction region 70 of the flared collar 66.
  • the fitting portion 170 allows the tubing element 160 to be held in position, at least temporarily, on the heat exchanger.
  • the shoulder 168 facilitates the mounting of the tubing element since it provides an axial abutment during the force introduction of the tubing member 160 in the flared collar 66.
  • the tubing element 150 is then brazed with the tip 60 and / or the flared collar 66 so as to obtain a final fixation.
  • tubing elements 130, 140, 150 and 160 have been described here by way of example. All have a joining portion between the tubing member and the flared collar 66 of the tip of an end circuit element and a portion for receiving an element of the remainder of the fluid flow circuit. Thus, it is possible to combine the different joining parts described on the Figures 26, 27, 28 and 29 with the different parts hosting an adjacent element of the circuit described in these figures.
  • the fluid flowing in the circuit elements may be a coolant such as the engine engine coolant, or a coolant in the case where the circuit element serves to form a condenser or evaporator. 'an air conditioning circuit.
  • the fluid flowing in the circuit elements exchanges heat with another fluid, usually air, which flows outside the circuit elements.
  • the invention finds a general application to heat exchangers of motor vehicles.

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)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Lubricants (AREA)

Claims (34)

  1. Rohrendstück, das dazu ausgelegt ist, an einem Ende eines Fluidzirkulationsrohrs montiert zu werden, um ein Hydraulikkreiselement zu bilden, wobei das Endstück (60) zwei Schenkel (62) aufweist, die dazu ausgelegt sind, gegen zwei gegenüberliegende Flächen des Rohrs (22) gepresst zu werden, wobei einer der Schenkel wenigstens eine Erhebung (66) aufweist, die mit einer Perforation (68) versehen ist, um einen Fluidkommunikationsdurchlass zu schaffen, dadurch gekennzeichnet, dass die Erhebung und ihre Perforation (68) einen erweiterten Flansch (66) definieren, der einen umgedrehten ringförmigen Rand (70) aufweist, der eine Verbindungszone darstellt.
  2. Rohrendstück nach Anspruch 1, dadurch gekennzeichnet, dass es aus einem Blechstreifen gebildet ist, der umgebogen ist, um die zwei Schenkel zu bilden, wobei der erweiterte Flansch durch Tiefziehen der Erhebung mit ihrer Perforation gebildet ist.
  3. Rohrendstück nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Erhebung ein erstes Ende, das dazu vorgesehen ist, sich in der Nähe des Rohrs zu befinden, und ein zweites Ende gegenüber dem ersten Ende, auf dessen Höhe sich der Flansch befindet, umfasst.
  4. Rohrendstück nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jeder der Schenkel (62) des Endstücks (60) zwei parallele äußere Ränder (72; 76) umfasst, derart, dass die parallelen Ränder eines Schenkels mit entsprechenden parallelen Rändern eines anderen Schenkels verlötet werden können, indem das Ende des Rohrs umschlossen wird.
  5. Rohrendstück nach Anspruch 4, dadurch gekennzeichnet, dass die Ränder (72) der Schenkel (62) des Endstücks umgebogene Ränder sind, um ein Verlöten an zwei Blechscheiben zu ermöglichen.
  6. Rohrendstück nach Anspruch 4, dadurch gekennzeichnet, dass die Ränder (76) der Schenkel des Endstücks flache Ränder sind, um ein Verlöten an zwei Flächen des Blechs zu ermöglichen.
  7. Rohrendstück nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass wenigstens einer der Ränder (72; 76) eines der Schenkel (62) durch eine Lasche (74; 174) verlängert ist, die zu dem anderen Schenkel (62) umgeklappt werden kann, um die Schenkel (62) gegen das Ende des Rohrs (22; 122) zu halten, um sie zu verlöten.
  8. Rohrendstück nach Anspruch 7, dadurch gekennzeichnet, dass jeder der Ränder (72) eines der Schenkel (62) des Endstücks durch eine Lasche (74) verlängert ist, die dazu ausgelegt ist, zu dem anderen Schenkel (62) umgeklappt zu werden.
  9. Rohrendstück nach Anspruch 7, dadurch gekennzeichnet, dass ein erster Rand (76) eines ersten Schenkels (62) durch eine Lasche (174) verlängert ist, die dazu ausgelegt ist, zu einem ersten Rand (76) gegenüber einem zweiten Schenkel (62) umgeklappt zu werden, dessen zweiter Rand (76) durch eine Lasche (174) verlängert ist, die dazu ausgelegt ist, zu dem zweiten Rand (76) des ersten Schenkels (62) umgeklappt zu werden.
  10. Rohrendstück nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die zwei Schenkel (62) jeweils eine Erhebung aufweisen, die einen erweiterten Flansch (66) bilden.
  11. Rohrendstück nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass einer der Schenkel (62) eine Erhebung aufweist, die einen erweiterten Flansch (66) bildet, während der andere Schenkel eine Erhebung (90) mit flachem Boden, die mit einer Perforation versehen ist, aufweist.
  12. Rohrendstück nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass einer der Schenkel (62) eine Erhebung aufweist, die einen erweiterten Flansch (66) bildet, während der andere Schenkel eine Erhebung (90) mit flachem Boden, die nicht perforiert ist, aufweist.
  13. Rohrendstück nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass der ringförmige Rand (70) des erweiterten Flansches (66) eben ist.
  14. Rohrendstück nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass der ringförmige Rand (70) des erweiterten Flansches (66) leicht kegelstumpfförmig ist, um eine Hohlkehle zu bilden, die einen Winkel (θ) kleiner als 2° besitzt.
  15. Rohrendstück nach einem der Ansprüche 2 bis 14, dadurch gekennzeichnet, dass jeder der Schenkel (62) auf seiner gesamten Oberfläche, die gegen eine Fläche des Rohrs drückt, eine verringerte Blechdicke (124) aufweist, wobei die Verringerung der Blechdicke somit eine Innenschulter (126) bildet.
  16. Rohrendstück nach einem der Ansprüche 2 bis 15, dadurch gekennzeichnet, dass die zwei Schenkel (62) durch einen Abschnitt des umgebogenen Blechstreifens, der eine Verbindungszunge (42) bildet, verbunden sind.
  17. Rohrendstück nach Anspruch 16, dadurch gekennzeichnet, dass die Verbindungszunge (42) gegenüber dem einen Ende des Fluidzirkulationsrohrs (122) vorgesehen ist und vorzugsweise im Wesentlichen auf der Achse des Rohrs (122) angeordnet ist.
  18. Rohrendstück nach Anspruch 16, wenn abhängig von Anspruch 2, dadurch gekennzeichnet, dass die Verbindungszunge (42) so vorgesehen ist, dass sie zwei jeweilige äußere Ränder der zwei Schenkel (76) vereinigt.
  19. Rohrendstück nach einem der Ansprüche 16 bis 18, dadurch gekennzeichnet, dass der Abschnitt des Blechstreifens, der die Verbindungszunge (42) bildet, auf sich selbst zurückgebogen ist, um zwei gegenüberliegende Flächen zu bilden, die gegeneinander drücken.
  20. Hydraulikkreiselement für Wärmetauscher, dadurch gekennzeichnet, dass es wenigstens ein Rohr (22) mit zwei Enden und wenigstens ein Endstück (60) an einem dieser Enden der Rohre umfasst, wobei das Endstück wie in einem der Ansprüche 1 bis 19 definiert beschaffen ist.
  21. Hydraulikkreiselement nach Anspruch 20, dadurch gekennzeichnet, dass das Rohr (22) ein flaches Rohr ist, das ein Durchgangsloch (56) aufweist, das in der Nähe eines Endes des Rohrs ausgebildet ist, und dass das Ende des Rohrs vollständig in das Endstück (60) eingeschoben ist, derart, dass sich das Durchgangsloch (56) gegenüber der Perforation (68) des erweiterten Flansches (66) befindet.
  22. Hydraulikkreiselement nach Anspruch 21, dadurch gekennzeichnet, dass das flache Rohr (22) mehrere parallele Innenkanäle (52) für die Zirkulation des Fluids umfasst.
  23. Hydraulikkreiselement nach Anspruch 20, dadurch gekennzeichnet, dass das Rohr (22) ein durch zwei gegenüberliegende Flächen (48, 50) begrenztes flaches Rohr ist und dass das Ende des Rohrs teilweise in das Endstück (60) eingeschoben ist, derart, dass es vor der Perforation (68) des erweiterten Flansches (66) arretiert.
  24. Hydraulikkreiselement nach Anspruch 23, wobei das Endstück wie in Anspruch 13 definiert beschaffen ist, dadurch gekennzeichnet, dass das Ende des Rohrs (122) an der Innenschulter (126) anliegt.
  25. Hydraulikkreiselement nach einem der Ansprüche 23 und 24, dadurch gekennzeichnet, dass das flache Rohr (22) zwei parallele Innenkanäle (84) für die Zirkulation des Fluids aufweist.
  26. Hydraulikkreiselement nach einem der Ansprüche 23 und 24, dadurch gekennzeichnet, dass das flache Rohr (122) mehrere parallele Innenkanäle (52) für die Zirkulation des Fluids aufweist.
  27. Wärmetauscher, insbesondere für ein Kraftfahrzeug, der einen Stapel von Kreiselementen (20) nach einem der Ansprüche 20 bis 26 enthält, die über Endstücke (60) kommunizieren, um einen Fluiddurchgang zwischen den Kreiselementen zu ermöglichen.
  28. Wärmetauscher nach Anspruch 27, dadurch gekennzeichnet, dass er außerdem ein Röhrenelement (130; 140; 150) umfasst, das an einem seiner Enden einen ringförmigen Abschnitt (132; 144; 154) mit einem Durchmesser aufweist, der den erweiterten Flansch (66) umgeben kann, der von dem wenigstens einen der Rohrendstücke (60) freigelassen wird, die sich an den Enden des Stapels befinden.
  29. Wärmetauscher nach Anspruch 28, dadurch gekennzeichnet, dass der ringförmige Abschnitt (132) auf seinem Umfang Vertiefungspunkte (136) aufweist, die eine Quetschverbindung des Röhrenelements (130) an dem erweiterten Flansch (66) bewerkstelligen.
  30. Wärmetauscher nach Anspruch 28, dadurch gekennzeichnet, dass die Vertiefungspunkte (136) auf dem Umfang des ringförmigen Abschnitts (132) gleich verteilt sind.
  31. Wärmetauscher nach Anspruch 28, dadurch gekennzeichnet, dass der ringförmige Abschnitt (144; 154) außen durch Haltelaschen (148) verlängert ist, die dazu vorgesehen sind, unter den erweiterten Flansch (66) geklappt zu werden.
  32. Wärmetauscher nach Anspruch 27, dadurch gekennzeichnet, dass er außerdem ein Röhrenelement (160) umfasst, das an einem seiner Enden einen ringförmigen Abschnitt (170) mit einem Durchmesser aufweist, der in eine innere ringförmige Öffnung des erweiterten Flansches (66) eingesetzt werden kann.
  33. Wärmetauscher nach Anspruch 32, dadurch gekennzeichnet, dass das Röhrenelement (160) außerdem angrenzend an den ringförmigen Abschnitt (170) einen Kranz (168) umfasst, der dazu bestimmt ist, sich an der Verbindungszone (70) des erweiterten Flansches (66) abzustützen.
  34. Wärmetauscher nach einem der Ansprüche 28 bis 33, dadurch gekennzeichnet, dass das Röhrenelement (150) in der Umgebung eines seiner Enden außen ein Gewinde aufweist.
EP04767810A 2003-07-29 2004-07-28 Rohrverschluss für ein element eines hydraulischen kreises, insbesondere für einen wärmetauscher Expired - Lifetime EP1649231B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04767810T PL1649231T3 (pl) 2003-07-29 2004-07-28 Końcówka rury do elementu obwodu hydraulicznego, zwłaszcza do wymiennika ciepła

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0309323A FR2858399B1 (fr) 2003-07-29 2003-07-29 Embout de tube pour element de circuit hydraulique, en particulier pour echangeur de chaleur
FR0404448A FR2858385B1 (fr) 2003-07-29 2004-04-27 Embout de tube pour element de circuit hydraulique, en particulier pour echangeur de chaleur
PCT/FR2004/002029 WO2005012822A2 (fr) 2003-07-29 2004-07-28 Embout de tube pour element de circuit hydraulique, en particulier pour echangeur de chaleur

Publications (2)

Publication Number Publication Date
EP1649231A2 EP1649231A2 (de) 2006-04-26
EP1649231B1 true EP1649231B1 (de) 2012-04-18

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EP04767810A Expired - Lifetime EP1649231B1 (de) 2003-07-29 2004-07-28 Rohrverschluss für ein element eines hydraulischen kreises, insbesondere für einen wärmetauscher

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EP (1) EP1649231B1 (de)
AT (1) ATE554362T1 (de)
FR (1) FR2858385B1 (de)
PL (1) PL1649231T3 (de)
WO (1) WO2005012822A2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10208879B2 (en) 2016-05-31 2019-02-19 A. Raymond Et Cie Fluid connector assembly

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PT2290133E (pt) 2009-08-25 2012-06-19 Thyssenkrupp Steel Europe Ag Método para a produção de um componente de aço com um revestimento metálico anti-corrosão e um componente de aço
FR3061767B1 (fr) * 2017-01-06 2019-05-24 Valeo Systemes Thermiques Boite collectrice pour echangeur thermique, notamment pour vehicule automobile, echangeur thermique et procede de fabrication correspondant.
CN212157731U (zh) * 2019-12-25 2020-12-15 浙江盾安热工科技有限公司 换热器及制冷系统

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IT1179639B (it) * 1984-05-04 1987-09-16 Piemontese Radiatori Radiatore per autoveicoli
JPH0619965Y2 (ja) * 1988-01-22 1994-05-25 サンデン株式会社 熱交換器
JPH08327283A (ja) * 1995-05-30 1996-12-13 Sanden Corp 熱交換器の熱交換チューブ接合構造
FR2737287B1 (fr) * 1995-07-25 1997-09-12 Valeo Thermique Moteur Sa Echangeur de chaleur a boite collectrice sous forme d'un empilement
DE19605340C2 (de) * 1996-02-14 2000-11-09 Behr Gmbh & Co Wärmeübertrager und Verfahren zu seiner Herstellung
JP2001153585A (ja) * 1999-11-29 2001-06-08 Showa Alum Corp 熱交換器
FR2813663B1 (fr) * 2000-09-04 2002-12-20 Didier Costes Echangeur de chaleur utilisant des plaques alveolaires extrudees
FR2834336B1 (fr) * 2001-12-28 2006-12-01 Valeo Thermique Moteur Sa Element de circuit pour echangeur de chaleur, notamment de vehicule automobile et echangeur de chaleur ainsi obtenu

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10208879B2 (en) 2016-05-31 2019-02-19 A. Raymond Et Cie Fluid connector assembly

Also Published As

Publication number Publication date
PL1649231T3 (pl) 2012-11-30
FR2858385A1 (fr) 2005-02-04
FR2858385B1 (fr) 2006-02-17
WO2005012822A3 (fr) 2005-05-19
ATE554362T1 (de) 2012-05-15
WO2005012822A2 (fr) 2005-02-10
EP1649231A2 (de) 2006-04-26

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