Classifications

• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
  • H10N10/10—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects
  • H10N10/13—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects characterised by the heat-exchanging means at the junction
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F1/00—Tubular elements; Assemblies of tubular elements
  • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
  • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
  • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
  • F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements

Definitions

• Thermoelectric device in particular for generating an electric current in a motor vehicle
• the present invention relates to a thermoelectric device, in particular for generating an electric current in a motor vehicle.
• thermoelectric devices using so-called electrical thermo elements, for generating an electric current in the presence of a temperature gradient between two of their opposite faces according to the phenomenon known as the Seebeck effect.
• These devices comprise a stack of first tubes, intended for the circulation of the exhaust gases of an engine, and second tubes, intended for the circulation of a heat transfer fluid of a cooling circuit.
• the electrical thermo elements are sandwiched between the tubes so as to be subjected to a temperature gradient from the temperature difference between the hot exhaust gases and the cold cooling fluid.
• Such devices are particularly interesting because they make it possible to produce electricity from a conversion of the heat coming from the exhaust gases of the engine. They thus offer the possibility of reducing the fuel consumption of the vehicle by replacing, at least partially, the alternator usually provided therein to generate electricity from a belt driven by the engine crankshaft. .
• thermoelectric device comprising a first circuit, said to be hot, capable of allowing the circulation of a first fluid along a path along which the temperature of said first fluid decreases, and a second circuit , called cold, capable of allowing the circulation of a second fluid, of a temperature lower than that of the first fluid, along a path along which the temperature of said second fluid increases, and so-called electrical thermo elements, for generating an electric current in the presence of a temperature gradient, said electric thermoelectric elements being distributed along said hot circuits and cold, provided configured to create said gradient.
• the device is configured so that the contribution of the electric thermoelectric elements to the generation of electricity is substantially constant along the path of the first and / or second fluid.
• the amount of heat transmitted to the thermo elements is adapted along the path of the first and / or second fluid. In this way, a substantially constant current is generated at the level of the electric thermoelectric elements over the entire device.
• the device according to the invention comprises fins, in heat exchange relation with said hot circuit and / or said cold circuit, said fins being configured to form a beam, the thermoelectric elements being in contact at least with said fins.
• thermoelectric elements By associating the electric thermo elements with fins, it facilitates the intimacy of the contact between them and the components, hot and / or cold, of the device in contact with which they must be to be subjected to a temperature gradient. Indeed, the obligation to establish a close connection between the thermoelectric elements and the component or components creating the temperature gradient necessary for their operation is no longer carried by the fluid circulation tubes but by a specific component, the fins, which can be chosen for this, at least for one of said hot or cold circuits.
• the technical solutions used to establish an effective thermal bridge between, on the one hand, the fins and the tubes and, on the other hand, the fins and the electric thermo elements can therefore be optimized separately.
• said fin bundle is configured to allow substantially constant heat transmission to the thermoelectric elements
• the density of fins in heat exchange relationship with said hot circuit and / or said cold circuit is increasing along the path of the first fluid and / or the second fluid
• the hot circuit comprises tubes, said to be hot, for the circulation of the hot fluid,
• said cold circuit comprises tubes, said to be cold, for the circulation of the cold fluid,
• said fins, said to be cold, are in heat exchange relation with the cold tubes
• thermoelectric elements are in heat exchange relation, on the one hand, with the hot tubes and, on the other hand, with the cold fins,
• the material thickness of the cold fins is increasing along the path of the first fluid and / or the distance between two consecutive cold fins along the path of the first fluid is decreasing along said path.
• said hot circuit comprises tubes, said to be hot, for circulation of the hot fluid,
• said cold circuit comprises tubes, said to be cold, for the circulation of the cold fluid,
• said fins, said to be cold, are in heat exchange relation with said cold tubes, for the other part, said so-called hot fins are in heat exchange relation with said hot tubes,
• thermoelectric elements are provided in heat exchange relation, on the one hand, with the cold fins and, on the other hand, with the hot fins.
• the density of hot fins is increasing along the path of the first fluid
• the material thickness of the hot fins is increasing along the path of the first fluid and / or the distance between two consecutive hot fins along the path of the first fluid is decreasing along said path.
• FIG. 1 schematically illustrates a partial sectional view of an exemplary embodiment of the device according to the invention, the section being taken along a plane orthogonal to the longitudinal axis of the fins,
• FIG. 2 shows FIG. 1 in an alternative embodiment
• FIG. 3 illustrates a simplified version of the device of FIG. 1, the hot tubes and the cold tubes being moreover reversed,
• FIG. 4 shows FIG. 3 in an alternative embodiment
• FIG. 5 is a perspective view of the device illustrated in FIG.
• thermoelectric device comprising a first circuit 1, said to be hot, capable of allowing the circulation of a first fluid, in particular the exhaust gases of an engine, and a second circuit 2, said to be cold, capable of allowing the circulation of a second fluid, in particular a heat transfer fluid of a cooling circuit, of a temperature lower than that of the first fluid.
• the device also comprises elements 3, called electrical thermo, for generating an electric current in the presence of a temperature gradient.
• substantially parallelepiped shaped elements generating an electric current, according to the Seebeck effect, when they are subjected to said gradient between two of their opposite faces 4a, 4b, said active faces.
• Such elements allow the creation of an electric current in a load connected between said active faces 4a, 4b.
• such elements consist, for example, of Bismuth and Tellurium (Bi 2 Te 3).
• thermoelectric elements are, for example, for a first part, elements 3p of a first type, called P, making it possible to establish an electric potential difference in a direction, called positive, when they are subjected to a gradient given temperature, and, for the other part, elements 3n of a second type, said N, allowing the creation of a difference of electric potential in an opposite direction, said negative, when they are subjected to the same gradient temperature.
• the hot circuit 1 allows the circulation of the first fluid along a path along which the temperature of said first fluid decreases and the cold circuit 2 allows the circulation of the second fluid along a path along which the temperature of said second fluid increases.
• the hot circuit 1 thus comprises one or more inputs 40 and one or more outlets 41.
• the cold circuit 2 comprises one or more inlets 42, 52 and one or more outlets 43, 53.
• Said electric thermo elements 3p, 3n are distributed along said hot and cold circuits 1 and 2 which are configured to create said gradient.
• the device is configured so that the contribution of the electric thermoelectric elements to the generation of electricity 3p, 3n, from said hot circuits 1 and / or cold 2, is substantially constant along the path of the first and or the second fluid. It is thus possible to have an electric current generated at the level of all the electric thermoelectric elements 3p, 3n which is relatively constant, despite the increase and / or the temperature decrease undergone by the second and / or, respectively, the first fluid, in particular under the effect of the heat exchange with the electric thermo elements 3, 3p, 3n.
• thermo elements For this, according to a first solution, one can increase the exchange surface between the electric thermo elements and the hot and / or cold circuits, in particular through the number of thermo elements provided. It will also play on the height by providing thermo elements of different height along the path of the fluid or fluids.
• the electric thermo elements 3p, 3n may be chosen all identical, that is to say, among others, generating the same current under the same temperature gradient. And the device may have the same density of electric thermo elements 3p, 3n along the hot circuits 1 and / or cold 2.
• the device comprises, for example, fins 5f, 6c, 6f in heat exchange relationship with said hot circuit and / or said cold circuit.
• a temperature gradient is thus provided between said fins or between the fins in heat exchange relationship with one of said circuits and the other circuit.
• Said fins 5f, 6c, 6f are also in contact with the electric thermo elements 3p, 3n at the level, in particular, of their active face 4a, 4b.
• the electric thermo elements are arranged between two fins or between one of the fins in heat exchange relationship with one of the circuits and the other circuit.
• thermoelectric elements This ensures a current generation by the thermoelectric elements.
• the fins 5f, 6c, 6f which fulfill the function of establishing the thermal contact with the electric thermo elements, at least for one of the circuits.
• fin means an element having two large surfaces 7a, 7b opposite planar and of much smaller thickness than its width and its length, making it possible to establish a surface contact, for example, between one of said large surfaces 7a and the thermoelectric elements 3p, 3n at or opposite faces 4a, 4b to be subjected to a temperature gradient to generate an electric current.
• the fins 5f, 6c, 6f are formed in a heat-conducting material, in particular a metallic material such as copper or aluminum.
• Said fins 5f, 6f, 6c form a bundle and, in this configuration, it will be possible to use the bundle of fins 5f, 6f, 6c to obtain the desired result.
• the fin beam 5f, 6f, 6c is configured to allow substantially constant heat transmission to the electric thermo elements 3p, 3n.
• the density of fins 5f, 6f, 6c in heat exchange relationship with said hot circuit 1 and / or said cold circuit 2 is increasing along the path of the first fluid and / or the second fluid.
• fin density is meant the material thickness of the fins in contact with the hot circuits 1 and / or cold 2, in particular their tubes 9, 17, 18 according to the different implementation modes developed below, per linear meter. In this way, their density can be increased by increasing their thickness and / or reducing their spacing.
• a ratio between the density of the fins located near the outputs of the first and / or second fluids 41, 43, 53 on the density of the fins located near the entrances of the first and / or second fluid 40, 42, 52 being between 2 and 5, in particular between 3 and 4.
• first and / or second fluid may be provided along the paths of the first and / or second fluid, for example three groups, the fins 5f, 6f, 6c being identical in the same group and the density fins extending from one group to another along the paths of the first and / or second fluid.
• the first group namely that located near the inlet of the first and / or the second fluid has, for example, a first spacing and / or a first thickness, the group following a lower spacing and / or a greater thickness. and so on, the group closest to the output of the first and / or second fluid having the lowest spacing and / or the thickest thickness.
• Some of said fins 5f, 6c, 6f may be associated in pairs, a compressible material January 1 being provided between the fins of the same pair. It is thus possible to ensure an absorption of the mechanical stress generated by the expansion of the hot and / or cold circuits at the level of said material.
• the fins 5f, 6c, 6f are, for example, of identical size and arranged parallel to each other, one of the large faces 7b of one of the fins 5 being disposed opposite to each other. -vis one of the large faces 7b of the other fins of the pair.
• the fins are coated with an electrically insulating material and are provided at their vis-vis face with electrical thermo elements of one or more electrically conductive tracks, not shown, connecting , in series and / or in parallel, the thermo-conductive elements arranged on the fin.
• the fins 5f, 6c, 6f contribute to the conduction of the electricity produced by the electric thermo elements 3p, 3n.
• Said compressible material 1 1 may be electrically insulating, in particular in the embodiment mentioned in the previous paragraph.
• the hot circuit comprises tubes 8, said to be hot, for the circulation of the hot fluid.
• the cold circuit it includes tubes 9, called cold, for the circulation of the cold fluid.
• the fins 5f, called cold are provided in heat exchange relation with the cold tubes 9.
• the electric thermo elements 3p, 3n are in heat exchange relation, on the one hand, with the hot tubes 8 and, d on the other hand with cold fins 5f.
• Said cold fins 5f are grouped in pairs, said compressible material 11 being provided between the fins of the same pair.
• Said hot tubes 8 are, for example, substantially flat tubes comprising two large opposite faces parallel 10a, 10b on which are arranged the electric thermo elements 3p, 3n by one of their active face 4a, 4b. They are configured to allow the circulation of exhaust gas and are, in particular, stainless steel. They are formed, for example, by profiling, welding and / or brazing. They may have a plurality of passage channels of the first fluid, separated by partitions connecting the opposite planar faces of the tubes.
• the hot tubes 8 are coated at the level of said large faces 10a, 10b of a layer of electrically insulating material and are provided with electrically conductive tracks connecting, in series and / or in parallel, all or part of the thermoconductive elements arranged on the hot tubes 8.
• the cold fins 5f have, for example, orifices 12 for the passage of cold tubes 9.
• Said cold tubes are, for example, aluminum or copper and have a round and / or oval section.
• the contact between the tubes 9 and the cold fins 5f is achieved, for example, by an expansion of the material of the tubes as in the heat exchangers known as mechanical exchangers in the field of heat exchangers for motor vehicles .
• an electrical insulator is provided between the cold tubes 9 and the cold fins 5f.
• each flat face 10a, 10b of the hot tubes 8 are associated at least two said cold fins 5f-p, 5f-n, said neighbors, provided vis-à-vis said flat face and electrically isolated from each other.
• the thermoelectric elements provided between a first 5f-p of said neighboring fins, said P-type fin, and one of said flat faces, are of the P type and the thermoelectric elements provided between the other 5f-n of said two fins, said N-type fin, and said flat face are N-type, so as to create a potential difference between said two fins neighboring 5f-p, 5f-n.
• This subassembly consists of a cold 5f-p fin, one or more P-type thermoelectric elements, a face 10a or 10b of the hot tube 8, one or more thermo element N-type and a cold fin 5f-n defines a base brick that can be reproduced, the bricks then being electrically assembled in parallel and / or in series in different ways to allow the generation of a current having the intensity and / or the desired potential difference.
• the cold fin 5f-p in relation to the electric thermo elements of type P and the cold fin 5f-n in relation to the thermoelectric elements of type N may consist of one and the same cold fin, carrying current conduction tracks to avoid any short circuit between the part of the cold fin in connection with the P-type thermoelectric elements and the part of the fin cold in relation to the N-type thermoelectric elements.
• P-type fins 5f-p, respectively 5f-n of the N type are, for example, on either side of the same hot tube 9 and are electrically connected to one another in such a way as to associate in particular with each other.
• parallel electric thermo elements located on both sides of the hot tube 9.
• Said hot tubes are superimposed in a first direction Y orthogonal to the fins 5f in one or more rows 1 6, said hot tubes 8 of a row being arranged between two cold tubes 9. Said cold tubes 9 are oriented in the direction Y of stacking hot tubes 8.
• the hot tubes 8 of each row 16 are, for example, provided in the extension of each other from one row 16 to the other.
• the thermoelectric elements of the hot tubes 8 located in the extension of one another are, for example, connected in series from one row 16 to the other.
• the fins 5f-p, 5f-n lying on either side of the same hot tube 8, on one side of said tube, and the fins 5f-p, 5f-n of the hot tube 8 are found in the extension of the first in the row of hot tubes 8 neighbors are put to the same potential.
• the density of cold fins 5f increases along the path of the second fluid.
• the material thickness e of the cold fins 5f is increasing along the path of the first fluid and / or the distance between two consecutive cold fins 5f along the path of the first fluid is decreasing along said path.
• the electric thermo elements 3p, 3n are, for example, distributed in rank, the electric thermo elements of the same rank extending in the direction Z and several rows parallel to each other being provided.
• the same number of electric thermo elements is provided by rank and the same number of rank is provided from one hot tube 8 to the other along the path of the second fluid.
• said hot circuit comprises tubes 17, said to be hot, for circulation of the hot fluid
• said cold circuit comprises tubes 18, said to be cold, for the circulation of the cold fluid.
• These include, in particular, round and / or oval tubes, for example stainless steel for hot tubes 17 and aluminum or copper for cold tubes 18.
• said fins 6f, said cold are in heat exchange relation with said cold tubes 18 and, for the other part, said fins 6c, said hot, are in heat exchange relationship with said hot tubes 17.
• thermoelectric elements 3 are provided in heat exchange relation, on the one hand, with the cold fins 6f and on the other hand with the hot fins 6c.
• the tube / fin contact is, in particular, mechanical type, as mentioned above.
• an electrical insulator is provided between the tubes 17, 18 and the fins 6f, 6c.
• said cold tubes 18 and said hot tubes 17 extend in the same direction, called Y, and the hot fins and the cold fins are arranged parallel to each other in planes, orthogonal to the direction Y, the fins extending in a first direction, called Z, and in a second direction, called X.
• the density of hot fins 6c is, for example, increasing along the path of the first fluid.
• the material thickness of the hot fins 6c is increasing along the path of the first fluid and / or the distance between two hot fins 6c consecutive along the path of the first fluid is decreasing along said path.
• the density of fins may be constant along the path of the second fluid.
• the electric thermo elements 3p, 3n are distributed in rank, the electric thermo elements of the same rank extending in the direction Z and several rows parallel to each other being provided.
• the same number of electric thermo elements is provided by rank and the same number of rank is provided from one hot tube 8 to the other along the path of the second fluid.
• the fins 6c there are provided three groups of fins 6c identical, a first group, provided near the inlet of the first fluid, wherein the spacing between the fins is of the order of 5 mm, a second intermediate group in which the spacing between the fins is of the order of 3 mm and a last group, provided near the outlet of the first fluid, wherein the spacing between the fins is of the order of 1, 5 mm, the fins having, for example, a thickness of about one millimeter.
• the cold fins 6f and the hot fins 6c are grouped in pairs, so-called cold pair 19 / hot pair 20 respectively, and said compressible material 11 is provided. between the fins 6f, 6c of the same pair for the cold pairs and the hot pairs.
• the hot pairs and the cold pairs are alternated in the direction Y so that at least one said cold pair is located on either side of a said hot pair.
• a first of the hot fins 6c-u of said hot pair 20 is provided facing two cold fins 6f-u1, 6f-u2, of distinct cold pairs, called first and second upstream cold pairs, located in the extending one of the other, on the one hand of said hot pair 20, the other fin 6c-d of the same hot pair 20 facing two cold fins 6f-d1, 6f-d2 of distinct cold pairs, said first and second downstream cold pairs, located in the extension of one another, on the other hand of said hot pair 20.
• One or more P-type members are provided between the first 6c-u of the hot fins and the vane 6f-u1 of the first upstream cold pairs.
• One or more N-type elements are provided between said first of the hot fins 6c-u and the cold fin 6f-u2 of the second upstream cold pair.
• One or more P-type elements are provided between the other hot fin 6c-d of said hot pair 20 and the cold fin 6f-d2 of the second downstream pair.
• One or more N-type elements are provided between said other hot fin 6c-d of said hot pair 20 and the cold fin 6f-d1 of the first downstream pair.
• the upstream P-type elements face downstream N-type elements and the upstream N-type elements face downstream P-type elements.
• the device according to the invention may comprise, according to this embodiment example, a a plurality of hot pairs 20 extending from one another in the X direction and electrically isolated from each other so as to form a series of hot pairs in the X direction.
• Said hot pairs are also distributed in rank in which they follow each other in the direction Y.
• the cold pairs 19 are also distributed in rank in which they follow each other in the direction Y and / or in series in the direction X.
• the hot pairs 20 and the cold pairs 1 9 are, for example, provided staggered.
• the hot tubes 17 are provided, for example, between two rows of cold pairs January 19, in the direction Y, and / or the cold tubes 18 are provided between two rows of hot pairs 20 in the direction Y.
• the succession of hot pair 20 and / or cold 19 along the Y direction may end on both sides, in particular, by a hot wing 6c-t, provided only, rather than pair.
• the fins 6c, 6f extend longitudinally in the Z direction and transversely in the X direction and the hot tubes, respectively the cold tubes, are grouped in rows 21, 22 extending in planes orthogonal to the X direction.
• the device further comprises manifolds 23 for the hot fluid in which the hot tubes open at their ends.
• the cold tubes and / or the hot tubes are also distributed in rows extending in planes orthogonal to the direction Z.
• the cold tubes 18 of the same rank orthogonal to Z are connected in pairs by bent ducts 27 connected to their end so as to define a circulation of the cold coil fluid in said orthogonal row at Z.
• the ends of the coils are connected on both sides to a manifold 28 in which they open.
• the device comprises one or more hot pairs: the cold fin 6f-u2 of the second upstream cold pair and the cold fin 6f-d2 of the second downstream cold pair are set to the same potential, for the fins of the cold pairs located at a first end of the series of pairs cold,
• the cold fin 6f-d1 of the first downstream cold pair of one of the hot pairs is put at the same potential as the cold fin 6f-u1 of said first upstream cold pair of the next hot pair in the Y direction, said cold fins 6f-d2, 6f-u1 forming part of the same pair of cold fins, for the fins of the cold pairs being at the other end of the series of cold pairs.
• the fins of the cold pairs 6f present along one and / or the other of their longitudinal sides a folded edge 29 for thermally isolating the remainder of the fin of a radiation of heat from the hot tubes 17 vis-à-vis.
• the cold pairs 30 alternate with the hot fins in the Y direction so that at least one said cold pair is located on either side of a said hot fin 6c.
• It may be provided at least two cold pairs in the extension of one another in the direction X and electrically isolated from each other.
• said hot fin 6c is provided, for example, facing two cold fins 6f-u1, 6f-u2, cold pairs distinct, said first and second upstream cold pairs, located in the extension of one another, provided on the one hand of said hot fin, said hot fin 6c also facing two cold fins 6f-d1, 6f-d2 , distinct cold pairs, said first and second downstream cold pairs, located in the extension of one another, on the other hand of said hot fin 6c.
• One or more P-type elements are provided between said hot vane 6c and the cold vane 6f-u1 of the first upstream cold pair.
• One or more N-type elements are provided between said hot vane 6c and the cold vane 6f-u2 of the second upstream cold pair.
• N-type elements are provided between the hot vane 6c and the cold vane 6f-d2 of the second downstream cold pair.
• P-type elements are provided between the hot vane 6c and the cold vane 6f-u1 of the first downstream cold pair.
• the upstream and downstream type elements P are located face to face on either side of the hot vane 6c. Similarly for N type elements.
• the cold fin 6f-u2 of the second upstream cold pair and the cold fin of the second downstream cold pair 6f-d2 are electrically connected so as to be at the same potential.
• the cold fin 6f-u1 of the first upstream cold pair and the cold fin 6f-d1 of the first downstream cold pair are electrically connected so as to be at the same potential.
• the fins 6f-d1, 6f-u1 of the first upstream and downstream cold pairs of one of said hot fins 6c are set to the same potential as those associated with the following hot fins, in the Y direction.
• the cold fins of the first cold pairs downstream and the cold fin of the first upstream cold pairs associated with two successive hot fins 6c along the Y direction are part of the same pair of cold fins.
• 6f-d2, 6f-u2 second cold pairs upstream and downstream.
• An advantage of the two embodiments of FIGS. 3 and 4 is that they make it possible to avoid thermal bridges between the hot components and the cold components, thanks to the production of hot-tube and hot-fin subsets. and subassemblies of cold tubes and cold fins, separated, even if they are nested, the only contact between these subassemblies taking place via the thermoelectric elements. In other words, there is an alternation between the P-type and N-type thermoelectric elements, in the X direction.
• the hot tubes and the cold tubes are interposed with each other while hot fins and cold fins are interposed each other, in planes perpendicular to the tubes, the cold fins and / or the hot fins being optionally distributed in pairs, the fins of the same pair being separated by said compressible material.
• each cold fin, respectively hot is provided with a passage opening and thermal contact with the cold tubes, respectively hot.
• thermoelectric elements of the same type Between a cold fin and a hot fin placed in vis-à-vis, there are provided thermoelectric elements of the same type.
• the fins of the same pair are put to the same electrical potential.
• the cold fins are successively connected in series.
• the electric thermoelectric elements located between two adjacent hot and cold fins are of alternating type, the fins being provided with current flow paths to prevent short circuits between the thermoelectric elements.
• electrically connected or by "put to the same potential” means that the fins are connected to each other in the case where it is they who conduct electricity or the tracks provided on the fins are interconnected from one fin to the other when the vanes are provided with conductive tracks, for example using connecting lugs and conventional electrical conductors.
• a method of obtaining the device according to the invention comprises a step in which the electric thermo elements are first assembled with the hot components, hot tubes 8 or hot fins 6c, then are then assembled with the cold fins 5f, 6f .
• the fins are stacked and, in a subsequent step, the cold tubes 9, 18 are assembled in the cold fins 5f, 6f. Similarly for the hot tubes 17 in the hot fins 6c in the embodiments with hot fins.
• the tubes 9, 17, 1 8 in contact with the fins are then subjected, for example, to an expansion.
• This is, in particular, a radial expansion, obtained by the passage of an expansion olive inside the tube, resulting in a crimping of the fins 5f, 6f, 6c on the tubes.

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• 2010
  • 2010-09-29 FR FR1057876A patent/FR2965401B1/fr active Active
• 2011
  • 2011-07-28 WO PCT/EP2011/063025 patent/WO2012041559A1/fr active Application Filing
  • 2011-07-28 US US13/876,742 patent/US9299906B2/en not_active Expired - Fee Related
  • 2011-07-28 EP EP11738219.2A patent/EP2622657A1/de not_active Withdrawn
  • 2011-07-28 JP JP2013530640A patent/JP2013543656A/ja active Pending

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