Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F1/00—Tubular elements; Assemblies of tubular elements
  • F28F1/02—Tubular elements of cross-section which is non-circular
  • F28F1/025—Tubular elements of cross-section which is non-circular with variable shape, e.g. with modified tube ends, with different geometrical features
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
  • F25B39/00—Evaporators; Condensers
• • 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
  • F28D1/047—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 bent, e.g. in a serpentine or zig-zag
  • F28D1/0471—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 bent, e.g. in a serpentine or zig-zag the conduits having a non-circular cross-section
• • 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
  • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
  • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
  • F28D2021/0035—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for domestic or space heating, e.g. heating radiators
  • F28D2021/0036—Radiators for drying, e.g. towel radiators

Definitions

• the present invention relates to a heat exchange plate with microchannels and a heat exchanger comprising at least one such plate.
• the heat exchangers or heat exchangers with microchannels comprise an envelope provided with a plurality of micro channels in which a fluid circulates.
• the fluid may be in liquid and gaseous form changing phase, or the fluid is in liquid form or in gaseous form.
• the outer surface of the envelope exchanges heat with the external environment by convection. For example, an air circulation can evacuate or provide heat.
• the outer surface of the envelope is provided with fins to increase the exchange surface with the external environment.
• This type of exchanger is for example used in evaporators or condensers of mechanical machines with mechanical compression of refrigerant.
• the heat exchanger comprises flat tubes arranged parallel to each other, each tube having a plurality of microchannels.
• the microchannels are connected in parallel to a common power supply and to a common evacuation.
• the tubes are for example made of aluminum by extrusion.
• the tubes are twisted. Air circulates between the tubes. Fines are provided between the tubes to promote heat exchange with the air flowing between the tubes. Air circulates between the tubes and the fins; the presence of the fins causes a fouling of the passages between the tubes and the fins and the occurrence of a pressure drop within the device and therefore a drop in efficiency of the heat exchange device.
• this device has many parts to manage and assemble.
• the thermal connections between the tubes and the fins are difficult to achieve in order to obtain a good thermal connection between the tubes and the fins. The manufacturing cost of this device is therefore high.
• a microchannel heat exchange plate comprising parallel strips, each strip comprising at least one microchannel extending from one end to the other of the strips and opening into said ends, a first fluid being intended to flow in said microchannels, each of the bands having a corrugation, the relative arrangement of the strips being such that the corrugations of the bands define in a direction parallel to the plate and secant to the direction of the bands of the flow paths of a second fluid.
• the plate does not require the implementation of fins, the manufacture can be significantly simplified. In addition, fouling problems are reduced which allows to maintain a certain level of efficiency. Moreover, the corrugations of the strips create a tortuosity favorable to thermal exchanges between the first fluid flowing in the microchannels and the plate, in addition, they generate a large heat exchange surface between the plate and the second fluid.
• the heat exchange plate comprises microchannels for a first fluid, the plate is shaped so as to define virtual channels for circulation of a second fluid in a secant direction to those of the channels.
• the device comprising at least one heat exchange plate has a very high heat exchange compactness in terms of square meter of primary exchange surface reduced to the volume of the structure.
• the device comprises several stacked plates. New virtual channels are then defined between the bands of the plates that intersect.
• the heat exchanger it is possible to very easily adapt the heat exchanger to the operating conditions of the heat exchangers and to the required compactness. Indeed, the section of the flow paths can be varied easily, changing the pressure drop across the stack and the size of the stack.
• spacers are integrated in the plates to fix the distance between the plates.
• the subject of the present invention is then a heat exchange plate for a heat exchange device between a first fluid and a second fluid, said heat exchange plate extending in a plane, said heat exchange plate comprising at least two strips extending between a first edge of the heat exchange plate and a second edge of the heat exchange plate opposite the first edge in a first direction, the strips being arranged next to one another according to a second direction, each of the strips having at least one channel extending from the first edge to the second edge and opening into the first edge and the second edge, said channel being intended for the circulation of a first fluid, said strips each presenting a a corrugation comprising peaks and valleys, two directly adjacent strips being relatively relatively to each other such that an apex of a strip and a top of the directly adjacent strip are offset in the first direction and so that, in the second direction, the top of a strip and the hollow of the directly adjacent strip defines circulation paths of a second fluid.
• the second fluid circulating outside the bands and transversely thereto.
• each band has several channels.
• the strips have a thickness of between 0.5 and 10 mm and the channels have a hydraulic diameter of between 0.5 mm and 10 mm.
• the vertices are located on one side of the plane of the heat exchange plate and the recesses are located on the other side of the plane of the heat exchange plate.
• the subject of the present invention is also a heat exchange device comprising at least one heat exchange plate according to the invention, at least one supply manifold in a first fluid connected to the channels at the first edge of the heat sink plate. heat exchange and at least one exhaust collector connected to the channels at the second edge (6) of the heat exchange plate.
• the heat exchange plate is wound on itself in the form of a spiral
• the present invention also relates to a heat exchange device comprising at least two thermal exchange plates according to the invention, at least one supply manifold in a first fluid connected to the channels at at least a first edge. at least one heat exchange plate and at least one evacuation collector connected to the channels at at least a second edge of at least one heat exchange plate, said heat exchange plates being stacked with so that the peaks and the hollow of the bands delimit between them circulation paths of the second fluid.
• the heat exchange plates are identical and are oriented relative to each other so that the strips of a heat exchange plate are located at least partly between the strips of the heat exchange plate. other heat exchange plate.
• the heat exchange plates are identical and are oriented relative to each other so that each vertex of a heat exchange plate bears against a hollow of the other heat exchange plate.
• the heat exchange plates can be joined together by welding points at a hollow and an apex, two vertices or two recesses.
• the heat exchange device may comprise spacer means fixing the distance between two successive plates.
• the spacer elements are formed by the welding points.
• the plates are bent and are arranged relative to each other about an axis so that the device has a symmetry of revolution.
• the heat exchange plate (s) is (are) manufactured by extrusion and forming.
• the heat exchange plates can be made from strips made individually and then secured to each other, the spacer elements being interposed between strips when they are secured.
• Each spacer element may then comprise a strip and at least one projection forming a spacer, said strip being secured to the heat exchange strips.
• the projection may be a tongue cut in the band and folded.
• the tongue has a free end comprising a flap intended to be secured to an adjacent plate.
• the heat exchange plates are made from a grooved plate between two solid plates, the spacer elements being made in one piece with said stack by cutting and deformation.
• the present invention also relates to a method of manufacturing a heat exchange plate comprising the steps:
• the present invention also relates to a method of manufacturing a heat exchange plate comprising the steps
• the present invention also relates to a method for manufacturing a heat exchange device comprising at least one heat exchange plate comprising the steps
• the present invention also relates to a method for manufacturing a heat exchange device comprising at least two heat exchange plates comprising the steps
• the two plates may be identical and may be stacked so that the strips of one plate are located at least in part between the strips of the other plate.
• the two plates may be identical and may be oriented relative to each other so that each vertex of one plate bears against a hollow of the other plate.
• spacer elements are for example made by cutting and folding the plates.
• step A ' strips having at least one projecting portion intended to abut against another plate may be interposed between bands provided with channels.
• FIG. 1 is a perspective view of an exemplary embodiment of a heat exchange device with a single heat exchange plate
• FIG. 2A is a perspective view of the plate of the device of FIG. 1 represented alone,
• FIG. 2B is a side view of the plate of FIG. 2A
• FIG. 3 is a side view of another exemplary embodiment of a heat exchange plate
• FIGS. 4A and 4B are diagrammatic representations of two steps for producing a heat exchange plate according to a second technique
• FIG. 4C is a cross-sectional view of an alternative embodiment of a heat exchange plate according to the second technique
• FIG. 4D is a perspective view of a single strip in the case of a manufacture according to a variant of the first technique
• FIG. 5 is a perspective view of an exemplary embodiment of a heat exchange device comprising a plurality of heat exchange plates disposed relative to one another in a first configuration;
• FIG. 6A is a perspective view of the plates of the device of FIG. 5,
• FIG. 6B is a side view of the stack of FIG. 6A
• FIGS. 7A to 7F are stack side views of the plates of FIG. 6 with different spacings
• FIG. 8A is a perspective view of a stack of heat exchange plates according to a second configuration
• FIG. 8B is a side view of the stack of FIG. 8A
• FIG. 9 is a perspective view of a practical embodiment of a heat exchange device of FIG. 5,
• FIG. 10A is a side view of a stack of plates according to the first configuration comprising spacer elements according to a first exemplary embodiment
• FIG. 10B is a side view of a stack of plates according to the second configuration comprising spacer elements according to a first exemplary embodiment
• FIG. 11A is a perspective view of a stack of plates according to the first configuration comprising spacer elements according to a second exemplary embodiment
• FIG. 11B is a detail view of FIG. 11A
• FIG. 11C is a perspective view of a spacer element used in the stack of FIG. 11A represented alone,
• FIG. 12A is a perspective view of a stack of plates according to the second configuration comprising spacer elements according to a third exemplary embodiment
• FIG. 12B is a detail view of FIG. 12A
• FIG. 13 is a perspective view of an exemplary embodiment of a heat exchange device having a symmetry of revolution
• FIG. 14 is a perspective view of an exemplary embodiment of a heat exchange device comprising a spiral wound plate on itself
• FIG. 15 is a side view of a strip of a heat exchange plate on which are dimensioned.
• the heat exchange device of FIG. 1 comprises a heat exchange plate 2 extending substantially in a plane P.
• the plate 2 comprises a plurality of strips B1, B2 ..., each band B1, B2 is substantially rectilinear and extends along a longitudinal direction X.
• Each band (see FIG. 4D) has a length L along the direction X, a width I along a direction Y perpendicular to the direction X and contained in the plane P and a thickness e in a direction perpendicular to the plane P.
• the strips B are arranged next to each other in the Y direction and are integral with each other.
• Each strip comprises at least one microchannel (not shown) extending in the X direction and opening into first and second longitudinal ends 4, 6 of the strips, forming the edges of the plates.
• microchannel means a channel whose hydraulic diameter is between 0.5 mm and 10 mm.
• each band has a plurality of parallel microchannels distributed along the Y direction.
• Each strip has a corrugation from its first longitudinal end 4 to its second longitudinal end 6. Preferably this corrugation is periodic.
• corrugations of the strips and the relative arrangement are chosen such that, in considering the direction Y, preferential flow paths C1, C2, ... for a second fluid between the bands are defined by all the bands and between the bands. .
• all the bands have the same corrugation, but the corrugations of two adjacent bands are out of phase, advantageously the phase shift is such that a recess 7 of a band is aligned with a vertex 9 of the adjacent band in the Y direction.
• flow paths of maximum section are delimited.
• a plate in which the depressions and the vertices are not aligned along the Y direction is not outside the scope of the present invention.
• the general profile of the undulation of the bands is a sinusoidal curve. It can be expected that the undulation of the strips is exactly a sinusoidal curve. In this case, preferably, the bands have the same undulation and two adjacent bands are out of phase of n.
• the device also comprises a supply manifold 8 connected to one end of the microchannels and intended to supply the microchannels with a first fluid and an evacuation manifold 10 connected to the other end of the microchannels and intended to collect the first fluid leaving the microchannels. microchannels.
• each band has at its ends, into which the microchannels open, flat portions 11, 13 contained in the plane P.
• all the microchannels open in the plane P at both ends of the plate facilitating the connection of the microchannels to the collectors supply 8 and evacuation 10.
• all the microchannels are connected to the same supply and discharge manifolds simplifying the manufacture of the device. But it could be planned to feed the microchannels of each band separately other bands, or even feed individually each microchannel. Similar configurations can be applied to microchannel evacuation.
• FIG. 3 shows another example of a plate viewed from the side along the Y direction.
• each strip has a corrugation such that it is situated on one side only of the plane P, two successive strips. Bl ', B2' being situated on either side of the plane P.
• Cl ', C2' we can see the privileged flow paths Cl ', C2'.
• the fluid flowing in the plates is for example a liquid, a gas or a liquid / gas mixture.
• the fluid flowing in the direction Y is for example a gas or a mixture of gases such as air or a liquid. It can be envisaged that the plate is arranged in a housing in which a circulation of liquid is established.
• a first fluid is circulated in the microchannels via the supply and discharge manifolds, the supply manifold being connected to a source of first fluid and the exhaust manifold being connected for example to a storage area of this first fluid.
• a pump is for example implemented to ensure the circulation of the first fluid.
• the exhaust manifold can be connected to the supply manifold to circulate the first fluid in a closed loop in the plates.
• the second fluid for example air
• the first fluid convectively exchanges with the material of the bands and the bands exchange by convection with the air.
• the heat exchanges are favored between the first fluid and the band material. Due to the very large surface of heat exchange, the exchanges between the air and the bands are favored. In addition, the pressure drops are low for the second fluid ensuring a significant air flow.
• the device allows very efficient heat exchange in a small footprint.
• the plate can be made according to different techniques.
• a multiport plate is made directly by extrusion, spaces being provided between the channels thus defining strips.
• the embossing or the shaping of the strips is then carried out so as to present the desired profile.
• the section of the patterns can be square, rectangular, cylindrical, semi-cylindrical, rhombic, triangular, ovoid ...
• strips such as the band B1 shown in FIG. 4D are produced individually, for example by extrusion.
• the channels are made during extrusion.
• FIG. 4D one can see one of the ends 19 of the channels.
• the bands B1 are then shaped so that they have a ripple.
• the bands B1 are then assembled, for example by welding, so that the recess zones of two successive bands are offset in the Y direction.
• the plates 2 are preferably of rectangular or square shape, the strips may extend in the length or width of the plates.
• FIGS. 4A and 4B an example of a second technique can be seen for manufacturing the plate of the heat exchange device 2.
• a rectangular or square plate 10 is made with slits extending perpendicular to two 10.1, 10.2 of its edges.
• the slots pass through the plate in its thickness but do not open into the edges 10.1, 10.2 of the plate 10.
• the slots 12 are for example made by stamping, laser cutting or chemical etching.
• Two full plates 14, 16 having the same external dimensions as the plate 10 are also produced.
• the plate 10 is disposed between the two solid plates 14 and 16 and the three plates 10, 14, 16 are then assembled so that the slots delimit with the inner faces of the plates 14, 16 sealed microchannels.
• the channels have a square or rectangular section but other sections are envisaged, for example a cylindrical or semi-cylindrical section.
• the plate 10 may be formed of two superimposed plates each comprising a portion of the section of the channels, which allows for the production of channels having more complex sections, for example a rhombic, triangular, ovoid section ...
• the slots are rectilinear, but it could be expected that they have a sinuous profile, to improve the exchange coefficient
• the plates 10, 14 and 16 are then assembled preferably by brazing, welding or molecular diffusion is also possible.
• edges 10.1, 10.2 of the plate 12 are then pierced with orifices 17, for example by machining right of the slots 12 so as to open the microchannels outwards as shown in Figure 4B.
• each band B1, B2 is deformed individually to give it the desired profile by applying transverse forces to the plane of the stack.
• the cuts between the channels are advantageously discontinuous so that the bands remain interdependent of each other in a discrete manner.
• the assembly can be made using two plates (FIG. 4C): a first plate 110 in which grooves are made for example by chemical etching, laser etching, machining, stamping, etc. and a second closure plate 112.
• the two plates thus assembled delimit the channels.
• FIG. 5 we can see an example of a heat exchange device D2 implementing several plates such as that shown in Figure 2A.
• the implementation of several heat exchange plates is very advantageous because it allows to have a very compact device in terms of heat exchange.
• the device of FIG. 5 comprises a stack of plates 2, a supply manifold 108 supplying all the plates in parallel and an evacuation collector 110 connected to all the plates. Alternatively one could provide individual collectors for each plate or collectors common to a group of plates.
• first fluid for example using channels to make a go and other channels to make a return. It may also be envisaged to circulate the fluid from one plate to the other in a stack of plates.
• the plates can have any orientation, for example horizontal or vertical, denotes the assembly formed by the plates arranged next to each other or on each other by "stacking".
• the plates 2 have the same orientation, so that the plates fit into each other.
• the plates define between them new preferred flow paths for the flow of air in the Y direction.
• the section of privileged paths is modified.
• the size of the stack is then easily modified to adapt to the requirements of heat exchange and compactness.
• FIGS. 7A to 7F different stacks can be seen according to the first configuration, the plates being increasingly spaced from each other from FIG. 7A to FIG. 7F.
• the distance between the end of the plates is designated E. It is found that thanks to the structure of the plates, it is very easy to modify the "porosity" of the stack, ie the section of the privileged paths, and thus to modify the characteristics of the heat exchange device. For example, it can be seen that the stack of FIG. 7A has the advantage of being very compact but that the crossing sections of the privileged paths are reduced, the pressure losses are then greater.
• a heat exchange device in which the distance between the plates would not be constant does not depart from the scope of the present invention.
• the device according to the invention therefore offers great adaptability to the conditions of space and efficiency and this in a very simple manner without having to modify the structure of the plates.
• FIGs 8A and 8B another configuration can be seen in which the plates have inverted configurations, i.e. the plates are arranged back to back.
• the plates 2 have a lower face 2.1 provided with recesses and an upper face 2.2 provided with vertices, whatever their orientation, the plates are superimposed so that each plate, with the exception of the lower end plates and upper, at its lower face opposite a lower face of the plate located on one side and its upper face opposite the upper face of the plate on the other side. There is then a plane of symmetry between the successive plates. The tops and hollows of the plates are then in contact, the plates do not fit into each other.
• This configuration has the advantage of offering a self-supporting stack and privileged flow paths of constant passage sections.
• FIG. 9 shows an exemplary practical embodiment of a heat exchange device D3 comprising a stack of plates 2.
• the stack is received in a frame 18 comprising two lateral uprights 20 connecting two lower and upper crosspieces 21.
• the ends of plates in which the microchannels open are fixed to the lateral uprights 20.
• the lateral uprights 20 are provided with lights through 23 to the right of the openings of the microchannels to allow their connection to a circulation circuit of the first fluid (not shown).
• the air flows between the crosspieces 21 and the uprights 20.
• the stack has the first configuration.
• the plates When the plates have a sufficiently small length not to exhibit significant bending, they can be supported only at their longitudinal ends.
• FIG. 10A represents a stack according to the first configuration, the soldering points 22 connect two peaks of the corrugations of plates.
• FIG. 10B shows a stack according to the second configuration, the soldering points 22 connecting an apex 9 of a plate and a recess 7 of another plate.
• the weld points advantageously extend the heat exchange surfaces of the plates, and are interposed in the air stream, in particular in the stack of FIG. 10A.
• the heat exchange efficiency of the device is therefore advantageously increased.
• insert elements forming spacers are provided.
• FIGS. 11A and 11B one can see a stack of plates provided with such elements according to an exemplary embodiment.
• element 24 is shown alone.
• the spacer elements 24, in the example shown, are arranged between two bands B1, B2 ... It comprises a band 26 of length equal to the bands B1, B2 and comprise at least one on one side of the strip and defining the spacing between the plates 2.
• each strip has two projections 25.
• each projection 25 is formed by a tongue 28 cut in the band and folded so as to project from one side of the band 26.
• the embodiment of the spacer elements is simplified and their mass is reduced. Alternatively, one could consider reporting on the band a stud forming the projection, in this case the mass of the element would be increased.
• This embodiment has the advantage of allowing the same spacer elements to be used for different spacings between the plates since it is sufficient to fold the tabs more or less to modify the spacing. They can therefore be used either to produce different devices each having their own distance between plates or to make a single device having different distances between the plates. The manufacturing cost can be reduced.
• the plates of the stack are made from strips shaped individually and then assembled.
• the spacer elements 24 are interposed between two bands, the strips B1, B2,... Being secured by their lateral edges to the spacer elements 24.
• Fig. 11B one can see a detail view of the stack of Fig. 11A.
• the stack corresponds to that of the first configuration.
• all the spacer elements 24 are identical, the plates 2 are then stacked so that the tongues 28 of two successive plates 2 are intersecting and non-parallel, the tongues 28 of the spacer elements 24 of the neighboring plate then rest on an unfolded area of the strip 26.
• the spacer elements are not identical from one plate to another. It could for example be provided that the distance between two tongues 28 is different from one plate to another so the plates could be stacked so that the tabs have the same orientation.
• the tabs are shaped to allow them to be secured to the plate against which they are supported. For example, their end free 28.1 is folded so as to have a flat support 30 against the plane below or above, for example on a flat area of the strip 26 in the example of Figures 11A and 11B.
• the plate 30 is for example secured to the other plate by diffusion welding or brazing.
• spacer elements 24 are provided in each pair of strips B1, B2 ... but it could be provided to dispose of every two or more strips.
• Each plate has at least two spacer elements 24.
• any form of spacer element may be suitable.
• all the plates comprise spacer elements, all the spacer elements being oriented towards the top plate or towards the bottom plate.
• every other plate in the stack comprises spacer elements, the tabs 28 being oriented alternately to the top plate and to the bottom plate.
• Strips having the same dimensions as the spacer elements are provided between the strips B1, B2 ... in the plates having no spacer elements in order to maintain the geometry of the stack.
• FIGS. 12A and 12B another example embodiment of plates provided with spacer elements more particularly adapted to the production of a plate according to the second embodiment technique described above can be seen.
• the spacer elements 124 are formed directly in the stack between the microchannels by cutting, stamping and folding.
• the spacer elements 124 are hook-shaped, the free end of the hook advantageously having a flange 130 for attachment to the adjacent plate by welding, diffusion or brazing.
• the spacer members 124 could have a tongue shape similar to that of FIGS. 11A-11C.
• the spacer elements 24, 124 are advantageously integrated with the plates, simplifying the production of the stack. But a device in which the elements ensuring the spacing between the plates would be independent of the plates are not beyond the scope of the present invention, for example in the case of the device of Figure 9, it is conceivable that the rods forming a support are fixed between the two lateral uprights, the plates resting on the stems. The distance between two successive rods in the vertical direction sets the distance between two plates.
• the plates are bent and are arranged around an axis Y1 so as to form a device having a symmetry of revolution.
• Each plate 2 comprises a collector 208, 210 at each end of the channels.
• the plates are mounted so that one of the connectors 208 is located radially inside the exchanger and the other collector 210 is disposed radially outside the device.
• the supply manifolds 208 are radially inside and are connected to a common supply manifold (not visible) for example at one of their ends and the exhaust manifolds 210 are radially outwardly and are connected to a common evacuation collector 212, for example at one of their ends.
• the common evacuation collector 212 has the shape of a ring.
• the central common manifold could be formed of a tube filling the entire central portion of the collector.
• the circulation of the air is symbolized by the arrows F. It circulates along the axis of symmetry Yl of the device. It can be provided a fan for example in the center of the device for moving the air by forced convection.
• FIG 14 we can see another embodiment shown schematically of a heat exchange device comprising a single plate.
• the plate is wound so as to form a spiral.
• the plate rolled up on itself functionally form a stack comparable to those of Figures 7A-7F.
• the plates of the exchanger are advantageously made of materials with very good thermal conductivity.
• the plates When the plates are made from a stack of sheets, they may for example be made of black steel, stainless steel, aluminum alloy and / or copper. In general, the plates can be made of any metallic material that can be assembled by brazing, soldering-diffusion, bonding, welding, solder-diffusion, ultrasonic welding, friction welding ("stir welding" in English terminology), laser beam welding, electron beam welding.
• thermoplastic polymer that can be assembled for example by gluing, ultrasonic welding, friction welding, high frequency welding, mirror welding, laser welding.
• Fillers such as, for example, carbon, boron nitride, glass or carbon fibers, carbon nanotubes may be incorporated into the polymers to improve their thermal conductivity and mechanical strength properties.
• a sheet of material having high thermal and / or mechanical properties such as, for example, a pyrolytic carbon sheet, a fabric or a mat of glass fibers. , carbon ... to obtain improved thermal and / or mechanical properties.
• the plates When the plates are made by extrusion, they can be made of any material capable of being extruded and preferably offering good thermal conductivity, such as metallic materials such as aluminum alloys, copper alloys or any other material that can be implemented by extrusion, such as ceramic or filled polymer.
• PVDF Polyvinylidene fluoride
• PPO Polyphenylene Oxide
• PP Polypropylene
• CPVC Polychlorinated Vinyl Chloride
• PA Polyamide
• PPS Polysulfide Phenylene
• PEI Polyetherimide
• PSU Polysulfone
• PBI Polybenzidimazole
• PFA Perfluoroalkoxy
• PEEK Polyetheretherketone
• PMMA Polymethacrylate Methyl
• Fillers such as, for example, carbon, boron nitride, glass or carbon fibers, carbon nanotubes may be incorporated into the polymer to improve its thermal conductivity and / or mechanical strength properties.
• the thickness e is preferably greater than or equal to 0.5 mm.
• the height h of the band i.e. the distance between a hollow and a vertex is greater than or equal to 1.5xe.
• the width I of the strip is, for example, greater than 1.5xe.
• the pitch p is preferably greater than 3xe.
• the angle ⁇ which represents the inclination of a corrugation with respect to the horizontal is preferably between 10 ° and 80 ° in the representation.
• the radius t of a vertex or a hollow is preferably greater than or equal to 3xe.
• the length L of a band can be any.
• the device offers an aesthetic appearance also allowing it to serve as an architectural element, for example on a facade or on a roof while ensuring its role of heat exchanger.
• the heat exchanger according to the invention can be applied for example to produce a radiator-type gas / liquid exchanger, a liquid / liquid exchanger, an evaporator or a condenser, exchanger arranged on the wall of a building, a type exchanger natural convection radiator, an onboard liquid / gas exchanger for aeronautics and aerospace ...

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

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• 2014
  • 2014-12-16 FR FR1462537A patent/FR3030029B1/fr not_active Expired - Fee Related
• 2015
  • 2015-12-16 EP EP15810654.2A patent/EP3234488B1/de active Active
  • 2015-12-16 WO PCT/EP2015/080063 patent/WO2016097032A1/fr active Application Filing

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