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
  • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
  • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
  • F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
  • F28D9/005—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
  • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
  • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
  • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
  • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
  • F28F3/048—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
  • F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
  • F28F3/083—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning capable of being taken apart

Definitions

• the field of the present invention is that of heat exchangers, in particular heat exchangers for the automobile.
• Motor vehicles are commonly equipped with heat exchangers. These transfer calories from one fluid to another and are used, for example, to cool internal combustion engines.
• exchangers are plate exchangers and are used to cool liquids such as oil. These exchangers include a stack of plates between which a plurality of channels are formed.
• the efficiency of these heat exchangers depends on the intensity of the heat exchange between the fluids, but also on the distribution of the fluids in the channels.
• the plate heat exchanger also includes a manifold which distributes the fluid in each of the channels with which it is connected. This collector is formed by openings in each of the plates.
• this collector has a circular section and the openings which constitute it are also of circular shape.
• the object of the present invention is therefore to solve the drawback described above by improving the distribution of the fluid over a large part of the width of the channel.
• the invention therefore relates to a heat exchanger circulation plate intended to delimit at least one fluid circulation channel, the circulation plate being provided with a bottom and a raised edge which surrounds the bottom , the circulation plate comprising at least one opening through which a fluid can enter the channel, characterized in that the opening is delimited by at least one edge at least partly straight.
• the presence of an at least partially straight edge to define the opening optimizes the circulation of the fluid, forcing it to be distributed over a greater width of the circulation plate.
• the circulation of the fluid is thus homogenized over the width of the channel, thereby reducing the temperature differences on the surface of the plate.
• This form of opening also optimizes the circulation of the fluid by limiting the obstruction of the at least one circulation channel and by preventing the formation of dead zone on the circulation plate.
• the two fluids flowing on either side of the plate are a cooling fluid and a heat transfer liquid.
• the circulation plate is thus configured to delimit a first channel traversed by the coolant and a second channel traversed by the coolant.
• the rectilinear part of the edge forms part of the bottom.
• the edge at least partially straight forms a first edge, the opening being delimited by a second edge which forms part of the raised edge.
• the opening is delimited by a first edge at least partly straight and formed on the bottom, and by the second edge which is part of the raised edge.
• the position of the second edge on the raised edge limits the dead zones that are usually found between the opening and the raised edge. Dead zones are characterized by low heat exchange, so they reduce the performance of the plate heat exchangers.
• the edge at least partially rectilinear forms a first edge, the opening being delimited by a second edge which forms part of the bottom.
• the second edge may follow a homothetic profile with a curved part of the raised edge.
• the first edge and the second edge which delimit the opening can both be part of the bottom.
• the fluid moves along the circulation plate in a direction of flow, the rectilinear part of the edge extending along a straight line transverse to the direction of flow.
• the bottom comprises a rib arranged so that the channel has a U-shaped profile.
• At least the opening is at least partially surrounded by a collar which emerges from the bottom and from which at least one plate extends in a plane substantially parallel, advantageously parallel, to a plane in which the bottom extends.
• the plate is configured to bear against a bottom of an adjacent plate.
• the collar at least partially surrounds the opening which includes the at least partially straight edge.
• the at least partly straight edge is formed on the collar plate.
• the collar comprises a flank which at least partially surrounds the opening and which is interposed between the bottom and the plate.
• the circulation plate is rectangular in shape and comprises a first longitudinal end and a second longitudinal end, a first opening devoid of a collar being formed at the first longitudinal end of the circulation plate, while 'a second opening having a collar is formed at the second longitudinal end of the circulation plate.
• the bottom includes at least one disruptor of the fluid flow.
• the bottom may include a plurality of disturbers that emerge from the bottom and extend into the channel.
• Flow disruptors create a turbulent flow that runs along the circulation plate. They disturb the boundary layer of the refrigerant and / or the heat transfer liquid which circulates in the channel or channels.
• At least one opening has an oblong shape.
• At least one opening may have a triangular or rectangular shape.
• the shape of the opening referred to here is observed from a viewing angle of direction perpendicular to a plane in which the bottom extends.
• openings allow the fluids to be distributed over a greater part of the width of the circulation plate and thus to maximize the exchange surfaces. They also make it possible to reduce the space between the two openings, usually not very thermally active.
• the heat exchanger comprises at least one circulation plate according to any one of the preceding characteristics.
• the plate is a closing plate of the heat exchanger or a circulation plate of this heat exchanger.
• the heat exchanger comprises two circulation plates which are nested one inside the other and which delimit between them the channel capable of being taken up by a refrigerant or a heat transfer liquid.
• three circulation plates are nested one inside the other and delimit two by two a first channel and a second channel, the first channel being configured to be taken up by a coolant while the second channel is configured to be used by a heat transfer liquid.
• FIG. 1 is a perspective view of a heat exchanger according to the invention.
• FIG. 2 is a cross-sectional view of a stack of three circulation plates constituting the heating body of a heat exchanger according to the invention.
• FIG. 3 is a perspective view of a heat exchanger circulation plate according to a first embodiment of the invention.
• - Figure 4 is a close-up view of a heat exchanger circulation plate according to a second embodiment of the invention.
• FIG. 5 is a perspective view of a circulation plate of a heat exchanger according to a third embodiment of the invention.
• a longitudinal direction A corresponds to the main axis of the plates in which they mainly extend, while the lateral orientations correspond to concurrent lines, that is to say which intersect the longitudinal direction, in particular perpendicular to the axis longitudinal of the plates.
• the longitudinal direction A is parallel to a longitudinal axis 1 of a trihedron 1, v, t, while the lateral direction B is parallel to a transverse axis t of the trihedron, the stacking direction being parallel to a vertical axis v of trihedral.
• FIG. 1 shows in perspective a heat exchanger 20 according to the invention.
• the heat exchanger 20 implements a heat exchange between a first fluid and a second fluid.
• the first fluid is for example a cooling fluid and the second fluid is for example a heat transfer liquid.
• the heat exchanger according to the invention is configured so that the refrigerant and the heat transfer liquid exchange calories without coming into contact. This feature will be detailed later in the following detailed description.
• the heat exchanger 20 comprises a heating body 15 where the heat exchange takes place between the refrigerant and the heat transfer liquid.
• the heating body 15 is formed by a superposition of plates, in a stacking direction d.
• the plates according to the invention are the circulation plates 1 and at at least one closure plate 2a, intended for sealingly closing the upper part of the heating body 15 in the stacking direction d.
• This closure plate 2a is positioned on top of all of the circulation plates 1 of the heating body 15, in the stacking direction d.
• closure plate 2a and the circulation plate 1 are grouped in the present document under the term plate, and the characteristic or characteristics described in relation to this term apply identically to the closure plate 2a and to the plate circulation 1.
• the heat exchanger 20 also comprises a closing cheek 2b, intended to seal the lower part of the heating body 15 in the stacking direction d.
• This closing cheek 2b is positioned below all of the circulation plates 1 of the heating body 15, that is to say opposite to the closing plate in the stacking direction d relative to the circulation plates 1.
• the circulation plates 1, the closing plate 2a and the closing cheek 2b have a bath-shaped configuration.
• An edge of the plate according to the invention that is to say at least the circulation plate 1 or the closing plate 2a or the closing cheek 2b, is a raised edge 5 which surrounds a bottom 3, then forming a bottom of the tub.
• the bottom 3 of the plate has a rectangular shape with rounded edges.
• the raised edge 5 of the plate according to the invention which surrounds the bottom 3 extends continuously all around the bottom 3 and has rectilinear longitudinal and lateral parts, joined by curved parts formed at each angle of the plate along the 'invention.
• the closure plate 2a and at least one circulation plate 1 comprise at least one opening 7.
• the closure plate 2a and the circulation plate comprise four openings referenced 7a, 7b, 7c and 7d .
• the first opening 7a and the fourth opening 7d are positioned at a first longitudinal end 110 of the plate.
• the second opening 7b and the third opening 7c are positioned at a second longitudinal end 120 of the plate according to the invention.
• the first opening 7a, the second opening 7b, the third opening 7c and the fourth opening 7d have in this FIG. 1 each an oblong shape.
• oblong is meant a shape which is longer than wide. This oblong shape is visible in a plane AB of the plate concerned.
• the first opening 7a has a side which extends in the longitudinal direction A of the circulation plate 1 or closure 2a and which runs along a part of the raised edge 5 formed at the first longitudinal end 110 of the plate. This characteristic also applies to the second opening 7b, third opening 7c and fourth opening 7d.
• the closing cheek 2b positioned under the stack of the circulation plates 1 in the direction d does not have any openings, so that the heat-transfer liquid and the coolant do not escape from the heating body 15.
• the heat exchanger 20 extends in the longitudinal direction A and also includes a first longitudinal end 110 and a second longitudinal end 120, the first longitudinal end 110 being opposite the second longitudinal end 120.
• the heat exchanger 20 has four collectors 8, a first collector 8a, a second collector 8b, a third collector 8c and a fourth collector 8d.
• the first manifold 8a and the fourth manifold 8d are each positioned in a corner of the first longitudinal end 110 of the heat exchanger 20.
• the second manifold 8b and the third manifold 8c are each positioned in a corner of the second longitudinal end 1 of the heat exchanger 20.
• the first collector 8a, the second collector 8b, the third collector 8c and the fourth collector 8d are volumes extending in the stacking direction d of the heating body 15. These collectors have the function of distributing or collecting the coolant or the refrigerant in the first channels 30a and in the second channels 30b (visible in FIG. 2).
• a collector volume 8 is delimited on one side by the opening 7 of the closing plate 2a, by the closing cheek 2b and by each of the openings 7 of the circulation plates 1, as will be detailed below.
• the heat transfer liquid and the coolant circulate separately in the heat exchanger 20.
• the first collector 8a and the fourth collector 8d are the collectors 8 reserved for the distribution or collection of the heat transfer liquid in the heating body 15.
• the second collector 8b and the third collector 8c are the collectors intended for distributing or collecting the coolant in the heating body 15.
• the first manifold 8a is the inlet of the heat transfer liquid into the heating body 15 and the fourth manifold 8d is the outlet of the heat transfer liquid from the heating body 15. Equivalently, the second manifold 8b is the inlet of the refrigerant fluid into the heating body 15 and the third collector 8c is the outlet of the cooling fluid from the heating body 15.
• FIG. 2 shows a side sectional view of a stack of circulation plates 1 according to the invention, along a plane B, d of FIG. 1.
• the superposition of the circulation plates 1 delimits channels 30 which are distinct from each other.
• a first channel 30a is arranged to be traversed by the coolant and a second channel 30b is arranged to be traversed by the heat transfer liquid.
• the heating body is organized so as to include an alternation of first channel 30a and second channel 30b along the stacking direction. The circulation of the coolant and the heat transfer liquid in the heating body therefore takes place alternately between the first channel 30a and the second channel 30b.
• FIG. 2 illustrates the presence of disturbers 13 of the fluid flow which are arranged on the bottom 3 of the circulation plate 1.
• the disturbers 13 extend above a plane of general extension of the bottom 3 of the circulation plate 1, emerging above the bottom 3 in the channel.
• the disturbers 13 have the function of disturbing the boundary layer of the heat transfer liquid and / or the refrigerant in the first channel 30a, respectively in the second channel 30b. Thus, the disturbers 13 maximize the heat exchanges between the refrigerant and the heat transfer liquid.
• the circulation plate i of FIG. 2 comprises the raised edge 5, the latter being distributed into a first longitudinal raised edge 5a, a second longitudinal raised edge 5b, a first lateral raised edge 5c and a second lateral raised edge, not visible on this figure. These longitudinal and lateral raised edges are joined by curved raised edges 5e, 5f, 5g and 5h, as is apparent in FIGS. 1 and 3 to 5.
• the raised edge 5 comprises an upper face 38 and a lower face 39. A part of the lower face 39 of the raised edge 5 of a first circulation plate 1 comes into contact with a part of the upper face 38 of the raised edge 5 of a second circulation plate 1. This contact between walls, produced around the entire periphery of the raised edge 5, generates a seal between two circulation plates 1, so as to form the first channel 30a or the second channel 30b. This characteristic applies to all of the raised edges of the circulation plates 1, of the closure plate 2a and of the closure plate 2b of the heat exchanger 20 of the invention.
• the raised edge 5 of the circulation plate 1 ends in a peripheral blank 50.
• This peripheral blank 50 extends in a plane parallel to the plane of the bottom 3 of the circulation plate 1 and goes all around the circulation plate 1. It will be noted that the peripheral blank 50 of a first circulation plate 1 is distant from the peripheral blank 50 of the second circulation plate 1 which is nested in the first circulation plate 1. This characteristic applies to all of the raised edges of the circulation plates 1 of the heat exchanger 20.
• the circulation plate 1 has a bottom 3 having an upper face 100 and a lower face 101.
• the stacking of the circulation plates 1 in the stacking direction d is characterized in that the lower face 101 of the bottom 3 of a first circulation plate 1 is opposite and at non-zero distance from the upper face 100 of the bottom 3 of a second circulation plate 1, immediately adjacent to the first circulation plate 1. This is how the first channel 30a and the second channel 30b are created.
• Figures 3, 4 and 5 illustrate three embodiments of the circulation plates 1 according to the invention.
• FIG. 3 illustrates a circulation plate 1 according to a first embodiment of the invention.
• the circulation plate 1 has the shape of a bathtub, that is to say that it comprises the bottom 3, continuously surrounded on its periphery by the first raised longitudinal edge 5a, the second raised longitudinal edge 5b, the first lateral raised edge 5c, the second lateral raised edge sd, a first curved raised edge 5e, a second curved raised edge sf, a third curved raised edge 5g and a fourth curved raised edge sh.
• the curved raised edges are arranged at the corners of the plate according to the invention, and join a longitudinal raised edge to a lateral raised edge.
• the circulation plate 1 extends in the longitudinal direction A between the first longitudinal end 110 and a second longitudinal end 120, the first longitudinal end 110 being opposite the second longitudinal end 120 relative to the bottom 3.
• Each circulation plate 1 comprises at least one opening 7.
• the circulation plate 1 comprises four openings 7, a first opening 7a, a second opening 7b, a third opening 7c and a fourth opening 7d .
• the first opening 7a and the fourth opening 7d are positioned at the first longitudinal end 110 of the circulation plate 1.
• the second opening 7b and the third opening 7c are positioned at the second longitudinal end 120 of the circulation plate 1.
• the first opening 7a, the second opening 7b, the third opening 7c and the fourth opening 7d of the circulation plate 1 have an oblong shape, seen in the plane AB.
• the opening 7 is therefore longer than it is wide, and this elongation is carried out along the transverse direction B.
• the first opening 7a, the second opening 7b, the third opening 7c or the fourth opening 7d of the circulation plate 1 have the first straight edge 9a and parallel to the raised side edge 5c, 5d.
• the opening concerned is also delimited by the second edge 9b which runs along the raised side edge 5c, 5d and the curved raised edge 5e, 5f, 5g, 5h.
• the first straight edge 9a and the second edge 9b form a slice of the bottom 3 of the circulation plate 1.
• the second edge 9b which delimits the opening 7 illustrated in this figure 3 has a first portion which is parallel to the raised side edge 5c , sd and a second portion which follows the curvature of the raised curved edge 5e, sf, 5g, sh.
• the collar 10 is a shoulder which emerges from the bottom 3 of the circulation plate 1.
• the collar 10 is composed of a plate 10a and a second part of collar 10b.
• the plate 10a extends above and parallel to the plane AB of the bottom 3 of the circulation plate 1, while the second collar portion 10b joins the bottom 3 to the plate 10a.
• a circulation plate 1 will comprise at least one collar positioned on at at least one opening 7 of a first longitudinal end 110 and the adjacent circulation plate 1 along the stack will comprise at least one collar on at least one opening 7 of a second longitudinal end 120.
• the heating body comprises a plurality of circulation plates 1 where at least one collar is alternately formed at one longitudinal end of the heating body or at the other longitudinal end of the heating body. All the characteristics of the openings 7 of the circulation plate 1 described in FIG. 3 apply to the plurality of circulation plates 1 of the heat exchanger.
• each pair of openings 7 positioned at the first longitudinal end 110 and at the second longitudinal end 120 of the circulation plate 1 correspond distinctly to an inlet and an outlet of the refrigerant or the heat transfer liquid.
• the first opening 7a corresponds to an inlet of the heat transfer liquid
• the fourth opening 7d corresponds to the outlet of the heat transfer liquid.
• the second opening 7b corresponds to the inlet of the coolant
• the third opening 7c corresponds to the outlet of the coolant.
• the circulation plate 1 also comprises a rib 11 which emerges from the bottom 3 of the circulation plate 1 and which extends in the longitudinal direction A.
• This rib 11 begins from the first raised side edge 5c, between the first opening 7a and the fourth opening 7d, and extends in the direction of the second longitudinal end 120 of the circulation plate 1.
• the rib 11 ends at a non-zero distance from the second raised side edge sd and thus divides the volume delimited by two plates circulation 1 to form the U-shaped channel.
• FIG. 4 illustrates a second embodiment of the circulation plate 1 according to the invention.
• FIG. 3 illustrates a second embodiment of the circulation plate 1 according to the invention.
• FIG. 4 shows the first longitudinal end 110 of the circulation plate 1.
• the first opening 7a and the fourth opening 7d are delimited by a first straight edge 9a and by a second curved edge 9b which follows the curvature of the raised curved edge 5e, sh of the circulation plate 1.
• the opening concerned is thus entirely delimited by the first straight edge 9a and by the second curved edge 9b.
• the first rectilinear edge 9a extends along a direction which is transverse to the longitudinal direction A and to the transverse direction B.
• the direction in which the rectilinear part of the first edge extends 9 cuts the lateral raised edge 5c, between the rib 11 and the curved raised edge 5 e , and also cuts the longitudinal raised edge 5a, between two raised edges curves located on either side of the raised longitudinal edge 5a.
• a collar can be formed around these openings 7 of triangular shape.
• the opening 7 delimited by this first straight edge 9a and by this second curved edge 9b is formed in the bottom 3.
• the first straight edge 9a and the second curved edge 9b are therefore edges of the bottom 3 of the circulation plate 1.
• the opening or openings 7 illustrated in this FIG. 4 have a triangular shape, seen in a plane AB, with rounded angles.
• the circulation plate i according to the variant illustrated in FIG. 4 has disturbers 13 on its bottom 3. Unlike FIG. 3, the triangular nature of the openings 7 allows an arrangement of disturbers 13 in the vicinity of the first longitudinal end 110 of the circulation plate 1.
• the circulation plate 1 comprises disturbers 13 which are formed between the rib 11 and the opening 7.
• a line of disturbers 13 is parallel to the rectilinear part of the first edge 9a.
• FIGS. 3 or 4 show a third embodiment of the invention.
• FIGS. 3 or 4 For the common elements of the circulation plate 1 with the previous embodiments, reference will be made to the detailed description of FIGS. 3 or 4.
• the first opening 7a and the fourth opening 7d have a first straight edge 9a formed by the bottom 3 of the circulation plate 1.
• the first straight edge 9a is a slice of the bottom 3 of the circulation plate 1 and the straight part is parallel at the first raised side edge 5c.
• the second opening 7b and the third opening 7c also have a first straight edge 9a formed by the collar 10 which emerges from the bottom 3 of the circulation plate 1, as detailed in FIG. 3.
• the first straight edge 9a which delimits this second opening 7b or this third opening 7c is a slice of this collar 10 and the rectilinear part is parallel to the second raised side edge sd.
• the opening or openings 7 illustrated in this FIG. 5 also have a second edge 9b, a first portion of which is parallel to the raised side edge 5c, 5d and a second portion follows the curvature of the curved raised edge 5e, sf, 5g, sh.
• the second edge 9b in particular its first portion and its second portion, is part of the raised edge 5. More specifically, the first portion of the second edge 9b is a slice of the raised side edge 5c and the second portion of the second edge 9b is a slice of the curved raised edge 5e which adjoins the lateral raised edge 5c.
• the opening or openings 7 of the third mode embodiments extend in the plane of the bottom 3 and also in a plane which follows the profile of the raised edge 5.
• the opening 7 concerned has an L-shaped section, seen in a plane parallel to the longitudinal direction A and perpendicular to the bottom 3.
• opening 7 applies of course to the openings 7c, 7d which are surrounded by the collar 10, such as those formed at the second longitudinal end 120.
• the first edge 9a and its straight part belong to the collar 10, while the second edge 9b is part of the raised edge 5.
• the invention thus achieves the goal it set for itself by improving the distribution of the fluid across the width of the channel, thereby improving the temperature uniformity over this width.
• the invention cannot however be limited to the means and configurations exclusively described and illustrated, and also applies to all means or configurations, equivalent and to any combination of such means or configurations.
• the invention has been described here in its application to a coolant / heat transfer fluid heat exchanger, it goes without saying that it applies to any shape and / or size of the plate or to any type of fluid circulating along the plate according to the invention.

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• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

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Publications (1)

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Family Cites Families (18)

• 2018
  • 2018-09-25 FR FR1858762A patent/FR3086379B1/fr active Active
• 2019
  • 2019-09-25 EP EP19795278.1A patent/EP3857156A1/de active Pending
  • 2019-09-25 CN CN201980077277.5A patent/CN113167550A/zh active Pending
  • 2019-09-25 WO PCT/FR2019/052272 patent/WO2020065227A1/fr unknown
  • 2019-09-25 US US17/278,908 patent/US11959706B2/en active Active

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