Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
  • B60H1/00—Heating, cooling or ventilating [HVAC] devices
  • B60H1/00321—Heat exchangers for air-conditioning devices
  • B60H1/00342—Heat exchangers for air-conditioning devices of the liquid-liquid type
• • 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
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
  • F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
  • F28F21/067—Details
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
  • F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
  • F28F9/005—Other auxiliary members within casings, e.g. internal filling means or sealing means
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F2220/00—Closure means, e.g. end caps on header boxes or plugs on conduits

Definitions

• Heat exchanger between a coolant and a coolant especially for a motor vehicle
• the invention relates to an exchanger between a coolant and a coolant. It is more particularly intended to allow a heating and / or cooling of said heat transfer liquid depending on the state of said refrigerant.
• a first solution is to use electric heaters powered by the vehicle battery but this reduces its autonomy.
• Another solution is to operate the air conditioning circuit of the vehicle heat pump.
• the refrigerant flowing through said circuit is used to pass calories from the outside of the vehicle to the inside thereof.
• exchangers for exchanging between the refrigerant and a coolant. The latter is then used to heat the passenger compartment of the vehicle.
• Such types of exchanger are in the form of brazed exchangers in which the refrigerant circulation channels and heat transfer liquid circulation channels are alternately defined by stacked plates.
• Such a configuration has advantages but is complex because of the number of components used.
• the brazed nature of the exchanger limits the possibilities of positioning the inlet and / or outlet flanges of the fluids circulating in the exchanger as well as the fixing flanges of the exchanger so that its integration into the vehicle is made complex. External corrosion phenomena are also observed.
• the invention aims to overcome the aforementioned drawbacks and proposes in this sense a heat exchanger between a coolant and a fluid refrigerant, in particular for a motor vehicle, said exchanger comprising a housing and a refrigerant circulation block, defining the circulation blades of said refrigerant superimposed in a stacking direction, said block being disposed in said housing, said exchanger being configured to defining a passage circuit of said heat transfer liquid in said housing between said blades so as to allow a heat exchange between the coolant and the refrigerant.
• the number of components is limited since it is no longer necessary to provide a plurality of plates for the corresponding circuit. It also increases the possibilities of integration of the fluid inlet and / or outlet interfaces as well as fixing flanges that can be reported or derived from material of the housing.
• said housing is configured to guide said block during assembly of the exchanger
• said housing comprises first and second parts defining an internal volume within which said cooling fluid circulation blades are located,
• said first part is formed of a box and said second part is formed by a closure lid of said box,
• said closure lid comprises a groove and said box is fixed in said groove, said box comprises inlet and / or outlet pipes for the heat-transfer liquid and / or said lid comprises passage orifices for said refrigerant,
• said inlet and / or outlet manifolds are made from material of said box, said exchanger comprises fastening flanges issuing from said box and / or said lid,
• said first and second parts are each formed of a shell, said shells being assembled to one another,
• said shells are assembled in a direction perpendicular to said stacking direction
• said block comprises an inlet and / or outlet window for the refrigerant in a direction substantially orthogonal to said stacking direction,
• each of said shells comprises a raised edge for assembly with the other of said shells by means of at least one fastening flange
• one of the parts comprises inlet and / or outlet pipes for the heat-transfer fluid and / or the other of the parts comprises inlet and / or outlet pipes for the refrigerant,
• said inlet and / or outlet manifolds are made from the material of said shells
• said box and / or said shells are made of plastic material and / or said lid is made of metallic material
• said housing comprises at least one partition intended to circulate said heat-transfer liquid in several passes and / or layers,
• said blades extend in a longitudinal direction perpendicular to the stacking direction
• said block comprises collectors for the refrigerant, located at a longitudinal end edge of the blades, said blade heads,
• said block comprises plates, stacked in said stacking direction, said plates being associated in pairs to define said refrigerant circulation blades, said block comprises fluid connections between the plates of the pairs of plates situated at the level of said blade heads, so as to form said collectors,
• said fluid connections comprise stampings coming from said plates, said stampings coming into contact with stampings of the plate opposite the neighboring pair of plates for the circulation of the refrigerant,
• said block is provided with first turbulators between said pairs of plates,
• said block is provided with second turbulators between the plates of the same pair of plates,
• said block has an open lateral face between said blades on the longitudinal end side of said blades opposite that provided with said collectors,
• said blades are configured to make a U-shaped circuit to the fluid between a first of said collectors and a second one of said collectors.
• Figure 1 is a sectional view of a first embodiment of a heat exchanger according to the invention.
• Figure 2 is a sectional view of a second embodiment of a heat exchanger according to the invention.
• FIG. 3 is a side view of a fluid circulation block that can be used in the exchanger of FIGS. 1 and 2;
• Figure 4 is a perspective view of a plate of the circulation block of Figure 3;
• Figure 5 is a sectional view partially illustrating an alternative embodiment according to the invention of the exchanger of Figure 1;
• Figure 6 is a sectional view partially illustrating an alternative embodiment according to the invention of the exchanger of Figure 2;
• Figure 7 is a sectional view of a third embodiment of a heat exchanger according to the invention.
• FIG. 8 is a perspective view of the exchanger of FIG.
• the invention relates to a heat exchanger between a coolant and a coolant, in particular for a motor vehicle.
• Said exchanger may in particular be used as a heating radiator and / or cooling said heat transfer liquid, depending on the state of said refrigerant.
• Said heat transfer fluid is, for example, water, in particular glycol water.
• Said coolant is, for example, the fluid known under the name R134a or R1234yf. Other applications are however possible.
• Said heat exchanger comprises a casing 1 and a block 2 for circulating the refrigerant fluid.
• Said block 2 defines blades 3 for circulating said refrigerant superimposed in a stacking direction D. In FIG. 2, said block 2 is partially illustrated. The refrigerant circulation is effected here according to the arrows marked 4.
• Said block 2 is disposed in said housing 1.
• said device is configured to define a passage circuit for said heat transfer liquid, according to the arrows marked 5, in said housing 1 between said blades 3 so as to allow a heat exchange between the coolant and the refrigerant.
• the refrigerant circulates in the block 2 which is bathed by the coolant circulating in the housing 2.
• Said block 1 is formed, for example, of aluminum components and / or aluminum alloy. It may be assembled, for example, by brazing said components.
• Said blades 3 extend here in a longitudinal direction L, perpendicular to the stacking direction D.
• Said block 2 may comprise collectors 6 for the circulation of the refrigerant in said blades 3.
• Said collectors 6 are located, for example, at a longitudinal end edge 7 of the blades 3, said blade head.
• Said blades 3 are configured here to make a U-shaped circuit to said fluid between a first and a second of said collectors 6.
• the first collector 6 thus constitutes an inlet manifold for the fluid while the second collector constitutes a collector of output of said fluid.
• the fluid flows in the block 2 being distributed by the inlet manifold 6 in the blades 3 where it follows the U-shaped circuit mentioned above to then enter the outlet manifold 6.
• said block 2 here comprises plates 10 stacked in said stacking direction D, said plates 10 being associated in pairs to define said blades 3 serving for the circulation of the refrigerant.
• said blades may be defined by extruded tubes, bent tubes or any other means for guiding a fluid. Said pairs of plates 10 are advantageously identical to each other.
• Said heat exchanger comprises fluid connections 12 between plates 10 of pairs of plates located at said plate heads 7, so as to form said collectors 6.
• Said fluid connections 12 comprise, for example, stampings 14 issuing from said plates 10, said stampings 14 coming into contact with stampings 14 of the plate opposite the neighboring pair of plates 10.
• the said stamps 14 are provided with port 16 for fluid passage.
• the said stamps 14 thus enable the circulation of fluid from one pair of plates to the other by matching said orifices 16.
• the said stamps 14 of the same manifold 6 are here located in the axial extension of each other. so that said collectors 6 are substantially rectilinear.
• Said plates 10 comprise a longitudinal end edge 18, said distal, opposite a longitudinal end edge 20 of said plates at which said fluid connections 12 are located.
• Said plates 10 comprise a bottom 22, a raised edge 24 and a brazing lip 26.
• Said pair of plates are formed by two of said plates 10, provided identical, mounted head to tail so that their lip 26 are in contact.
• Each of said pairs of plates 10 comprises a conduit for the circulation U of the fluid, between said collectors 6.
• Said blades 10 may comprise a disrupter 28 of the refrigerant flow.
• said disruptors define longitudinal channels for circulating said fluid.
• said disrupters are localized deformations on at least one of the plates delimiting a fluid circulation duct.
• Such deformations are preferably stampings made in concomitance with stampings 14 partially defining said fluid connections 12.
• the desired U-shaped circulation is obtained by a stamped form of the bottom of the plates such as a central partial rib starting from longitudinal end edges provided with the stampings 14 of connection.
• the inlet manifolds 6 open towards a first part of the channels of the disrupters 28 while the outlet manifold opens in opposite of a second part of the channels, separated from said first part of the channels by one or more central channels 30.
• said plates 10 comprise locking stampings 32, between the connecting pieces 14, closing the said central channel (s) 30 to one of their longitudinal ends.
• Said disruptors 28 are advantageously shorter than the bottom
• Said block 2 may be provided with turbulators 100 between said pairs of plates 10, said turbulators 100 being intended to be traversed by said heat transfer liquid.
• Said block 2 has internal heights of blades 3, for example from 1 to 1.5 mm for the circulation of the refrigerant and / or heights between pairs blades 3, for example, between 2 and 4 mm for the circulation of the booster liquid.
• Said block 2 has a lateral face 34 open between said blades 3, on the longitudinal end side of said blades opposite that provided with said collectors 6.
• said housing 1 comprises a first 40 and a second 42 portions defining an interior volume 44 inside which said refrigerant circulation blades 3 are located. This facilitates the assembly of the block 2. Said housing 1 may in this regard be configured to guide said block 2 during assembly of the exchanger.
• said first portion 40 is formed of a box and said second portion 42 is formed of a closure lid of said box.
• Said box 40 is, for example, plastic material, and / or said lid 42 is, for example, metal material, including aluminum and / or aluminum alloy.
• Said closure cover 42 here comprises a groove 46 and said box 40 is fixed in said groove 46.
• Said housing 1 may further comprise a seal 48, located in said groove 46.
• Said box 40 advantageously has a box foot 50 along an edge of said box 40, said gasket 48 being compressed in said groove 46 by said box foot 50.
• Said cover 42 is, for example, crimped on said box 40, here by crimping teeth 52 cooperating with said foot of box 50.
• Said box 40 comprises, for example, inlet and / or outlet pipes 54 for the heat transfer liquid.
• Said inlet and / or outlet pipes 54 are advantageously made from material of said box 40.
• Said cover 42 comprises on its side orifices 56 for passage for said refrigerant.
• Said passage orifices are located, for example, at the level of stampings 60 made in said cover to come into contact with said collectors 6 of the block 2 so that the refrigerant circulates in a cavity 62 defined by said stampings 60 of cover 42 by entering or leaving said manifolds 6.
• Said exchanger further comprises here a flange 58 inlet and / or outlet of refrigerant fixed on the cover 42 in screws of the through openings 56 and cavities 62.
• Said housing 1 may further comprise fixing flanges 63, 64 on said box 40 and / or on said cover 42, advantageously derived from material thereof.
• Such a housing 1 is illustrated externally in FIG. 8.
• Figure 5 illustrates an embodiment similar to the difference of the orientation of at least one of the inlet / outlet pipes 54 of the liquid.
• the tubing or pipes 54 come from a face of the box 40 opposite to the cover 42, while moving away from said cover 42 whereas in FIG. 5, the tubing or pipes 54 form a bend 55 in approaching said lid 42.
• said first and second parts are each formed of a shell 40, 42, said shells being assembled to one another.
• Said shells 40, 42 are, for example, made of plastic material.
• Each of said shells 40, 42 here comprises a raised edge 70 for assembly with the other of said shells. Said raised edges 70 are assembled against each other, for example, in plane-to-plane contact.
• Said shells 40, 42 are assembled to one another, for example by gluing, saddling and / or welding, in particular ultrasound. They may also be assembled by means of clamps 72, a seal 74 being provided between said shells 40, 42, here between their raised edge 70.
• One of the shells comprises inlet and / or outlet nozzles 76 for the heat transfer fluid and / or the other shell 42 comprises inlet and / or outlet pipes 78 for the refrigerant, advantageously derived from material of said shells.
• Said exchanger may further comprise flanges 80 for connection to the block 2, in particular at an axial end of said collectors 6, for the circulation of the refrigerant.
• Said flanges 80 for connection to the block 2 are positioned in said corresponding inlet / outlet pipes 78, if necessary by means of a seal 82 ensuring a seal between the internal volume 44 of the housing 1 and a pipe 84 defined by said pipes. 78 inlet / outlet of the fluid.
• Said flanges 80 for connection to block 2 establish a communication fluid tight between said conduits 84 and said block 2.
• the said manifolds 78 of fluid inlet / outlet may further accommodate means 86 for quick connection.
• the inlet and / or outlet pipes 76 for the heat transfer liquid may also accommodate rapid connection means (not shown).
• said shells 40, 42 are assembled in said stacking direction D.
• the contact plane of the raised edges 70 is orthogonal to said stacking direction D.
• the introduction of the refrigerant in block 2 is carried out in a direction parallel to said stacking direction.
• said shells 40, 42 are assembled in a direction perpendicular to said stacking direction.
• the contact plane of the raised edges 70 is parallel to said stacking direction D.
• the introduction of the refrigerant into the block 2 is performed in a direction orthogonal to said stacking direction.
• Said block 2 here comprises a window 90 for entering and / or leaving the refrigerant in a direction substantially orthogonal to said stacking direction D, at one and / or the other of said manifolds 6, plus precisely stampings 14 of the blades 10 of the same pair of blades.
• a connection with said fluid inlet / outlet manifolds 78 is established, for example, according to a solution similar to that of the embodiment of FIG. 2 using a connection flange 92.
• Said tubing 78 of FIGS. fluid inlet / outlet are here bent.
• said shells 40, 42 are assembled to one another, for example, at the interface zones between the blade heads and a heat exchange part of said blades 10.
• said housing 1 is configured to circulate said heat transfer liquid in several passes. It may thus comprise a partition 102 to ensure a U-shaped circulation of the coolant between the pipes 54, 76 for entering and leaving the coolant. The latter will be advantageously against the current flow U organized in the blades 3 of block 2.
• FIG. 7 shows an example of a housing 1 allowing a circulation in several plies and, in each ply, in several passes thanks to different partitions 104 formed in a wall of said housing 1.

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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)

Applications Claiming Priority (2)

Publications (1)

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ID=47882335

Family Applications (1)

Country Status (5)

Families Citing this family (3)

Citations (3)

Family Cites Families (11)

• 2012
  • 2012-12-21 FR FR1262623A patent/FR3000186B1/fr active Active
• 2013
  • 2013-12-12 WO PCT/EP2013/076411 patent/WO2014095580A1/fr active Application Filing
  • 2013-12-12 CN CN201380073665.9A patent/CN105074376A/zh active Pending
  • 2013-12-12 US US14/653,353 patent/US20160214457A1/en not_active Abandoned
  • 2013-12-12 EP EP13805858.1A patent/EP2936033A1/de not_active Withdrawn

Patent Citations (3)

Non-Patent Citations (1)

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