HEAT EXCHANGER HAVING A CLEANING DEVICE FOR A MOTOR VEHICLE

Description

[0001] The present invention relates to the field of heat exchangers, in particular intended to equip air conditioning systems and / or cooling systems of motor vehicles. More particularly, the invention relates to cooling systems for electrical storage devices of motor vehicles.

[0002] In the automotive field, it is common to have to modify a temperature of a component, such as an electric motor, a battery, a device for storing calories and / or frigories or the like. For this purpose, the motor vehicle is equipped with an installation which comprises a refrigerant circuit inside which a refrigerant circulates and a heat transfer liquid circuit inside which a heat transfer liquid circulates. The refrigerant circuit comprises a compressor for compressing the refrigerant, a condenser for cooling the refrigerant at constant pressure, an expansion member for allowing expansion of the refrigerant and a heat exchanger which is arranged to allow heat transfer between the refrigerant and the heat transfer liquid. The heat transfer liquid circuit comprises a pump and a heat exchange member capable of modifying a temperature of the component.

[0003] One solution currently favored by several manufacturers for cooling battery cells is to completely immerse these cells in the heat transfer fluid. The advantage of this solution is that it puts the heating element in direct contact with the heat transfer fluid, which allows more heat released by the cells to be dissipated. This increases cooling efficiency compared to traditional solutions. In addition, this solution is suitable for all battery charging modes used: fast, normal, or intermediate. Therefore, thermal management efficiency is significantly improved.

[0004] A first disadvantage of such a solution is that the liquid must remain free of particles circulating in the fluid to avoid premature deterioration of the cells and the heat exchanger and / or the pump by abrasion for example.

[0005] A second disadvantage of such a solution is the risk of short circuits. Indeed, the electrical resistance of the heat transfer fluid must be closely monitored because if it becomes contaminated with conductive elements, for example, present in the circuit or brought in by external water, it can become sufficiently electrically conductive to cause short circuits within the battery.

[0006] A third disadvantage of this solution is the possible corrosion of the cells if the heat transfer fluid is contaminated by water. Indeed, the water in contact with the cells rises in temperature, which significantly increases its corrosive power.

[0007] WO-A-02052215 discloses a heat exchanger according to the preamble of claim 1.

[0008] The object of the present invention is to address at least in part the above problems and to further lead to other advantages by proposing a new type of heat exchanger for a motor vehicle.

[0009] The invention provides a heat exchanger, in particular for a motor vehicle, comprising a plurality of plates, the plates being stacked on top of each other along a stacking axis to form a bundle of plates, at least one first plate and at least one second plate which define a first circulation path configured for circulation of a first fluid, at least the second plate and at least one third plate which define a second circulation path configured for circulation of a second fluid, the bundle of plates comprising a first distribution chamber which supplies the first circulation path with a first fluid, and a second distribution chamber which supplies the second circulation path with a second fluid. The heat exchanger further comprises at least one purification device arranged in one of the distribution chambers.

[0010] Thus, a function of the purification device may be to retain particles with a diameter large enough to block and / or damage a circulation path by abrasion.

[0011] In the context of cooling battery cells, the purification device may also have a function of absorbing any conductive particles coming from other components or from an external environment and which therefore represents a risk of short circuit.

[0012] The purification device removes water that may have entered the heat exchanger and thus prevents corrosion and / or conduction of electricity from the latter.

[0013] Finally, the pressure losses induced by the use of the purification device have the advantage of better distributing the first fluid or the second fluid in the plates of the heat exchanger bundle. In other words, the pressure losses created by the purification device are used to distribute the flow more uniformly in each of the plates.

[0014] According to one embodiment, the purification device has a shape that is substantially complementary to a shape of the distribution chamber in which it is arranged. Here, as in everything that follows, the term "substantially" means that manufacturing tolerances, as well as any assembly tolerances, must be taken into account.

[0015] According to one embodiment, the purification device has a cylinder shape. More particularly, the purification device has a right cylinder shape with a circular base or a triangular base.

[0016] According to one embodiment, the purification device extends over an entire length of the distribution chamber housing it measured along the stacking axis.

[0017] According to one embodiment, the distribution chamber housing the purification device passes through the beam along the stacking axis.

[0018] According to one embodiment, the purification device comprises an openwork support defining a perimeter of the purification device and a compartment of the purification device.

[0019] According to one embodiment, the purification device comprises at least one filter and / or at least one desiccant.

[0020] The term "desiccant" herein and in all that follows means a water-absorbing element or a mixture of one or more water-absorbing elements and / or other compounds.

[0021] According to one embodiment, the filter comprises a filtering surface, the filtering surface being arranged circumferentially to the support.

[0022] According to one embodiment, the filtering surface has a porosity of between 10µm and 500µm. The porosity is a maximum dimension of the particles retained by the filtering surface.

[0023] According to one embodiment, the desiccant comprises at least one water-absorbing element chosen from a silica gel, a magnesium sulfate, a calcium chloride, a calcium sulfate, a lithium chloride, and a molecular sieve, for example a zeolite.

[0024] According to one embodiment, the desiccant comprises a pocket arranged in the compartment of the purification device, the water-absorbing element being disposed in the pocket.

[0025] According to one embodiment, the heat exchanger comprises an interface capable of cooperating with an orifice of the distribution chamber housing the purification device and with the purification device.

[0026] The interface connects the circulation path to a loop or circuit. Thus, the fluid entering the distribution chamber housing the purification device through the interface is purified before entering the circulation path.

[0027] According to one embodiment, a passage of the interface and the compartment of the purification device are in hydraulic communication.

[0028] According to one embodiment, the interface is a single-piece with at least one part of the purification device. Here, as in everything that follows, the term "single-piece" means that the single-piece elements are a single piece, a single block.

[0029] According to one embodiment, the interface is integral with at least a portion of the purification device.

[0030] Here, as in everything that follows, it is understood by "made of material" that the elements made of material form a single piece, and are therefore made of the same material(s). This piece can be obtained for example by molding or by injection. This piece is therefore different from elements added by welding or bonding. According to one embodiment, the distribution chamber housing the purification device comprises a first and a second end, the first end being open to an external environment of the bundle along the stacking axis. According to one embodiment, the heat exchanger comprises a sealing member arranged between the interface and the purification device.

[0031] According to one embodiment, the heat exchanger comprises at least one sealing member arranged around one end of the interface.

[0032] According to one embodiment, the heat exchanger comprises at least one sealing member arranged around one end of the purification device.

[0033] According to one embodiment, the bundle has a mouth at one end, the mouth is configured to admit the fluid and to manipulate the purification device relative to the heat exchanger. Here, as in everything that follows, "manipulate" means that this concerns both the extraction and the insertion of the purification device into a distribution chamber for the purpose of replacing it. According to one embodiment, the mouth is at the right of the end of the distribution chamber which is open to an external environment of the bundle along the stacking axis.

[0034] According to one embodiment, the purification device comprises a fluid inlet opening. This opening allows the first or second fluid to be admitted into the purification device before it takes one of the circulation paths.

[0035] According to one embodiment, the interface comprises a passage configured to be in communication with a fluid inlet opening of the purification device. According to one embodiment, the purification device comprises a locking system for attaching the purification device to the interface and / or the beam mouth.

[0036] According to one embodiment, the locking system is configured to attach the interface to the beam mouth.

[0037] According to one embodiment, the locking system comprises a fixing socket. According to one embodiment, the locking system comprises a connecting socket.

[0038] According to one embodiment, the locking system comprises an axis pin. According to one embodiment, the second end of the distribution chamber housing the purification device is open to an external environment of the bundle along the stacking axis.

[0039] According to one embodiment, the purification device comprises a plug at an end opposite a fluid inlet opening.

[0040] According to one embodiment, the bundle has a first mouth at a first end, and a second mouth at a second end, the first mouth is configured to admit the fluid, and the second mouth to manipulate the purification device relative to the heat exchanger.

[0041] According to one embodiment, the first mouth is at the right of the first end of the distribution chamber.

[0042] According to one embodiment, the second mouth is at the right of the second end of the distribution chamber.

[0043] According to one embodiment, the purification device comprises a fastening device configured to attach the cap to the second mouth.

[0044] According to one embodiment, the fixing device comprises an axle pin capable of cooperating with the cap to ensure the fixing of the cap to the second mouth. According to one embodiment, the fixing device is a thread arranged at a periphery of the cap configured to cooperate with a thread of the second mouth.

[0045] According to one embodiment, one end of the purification device is housed in a passage of the interface.

[0046] According to one embodiment, the heat exchanger comprises at least one sealing member arranged around the plug.

[0047] According to one embodiment, the first fluid comprises at least one heat transfer fluid. In other words, the first fluid may comprise a heat transfer fluid or a mixture between one or more heat transfer fluids and one or more other fluids.

[0048] According to one embodiment, the heat transfer fluid comprises at least one dielectric heat transfer fluid. In other words, the heat transfer fluid may comprise a dielectric heat transfer fluid or a mixture between one or more dielectric heat transfer fluids and one or more other fluids.

[0049] According to one embodiment, the dielectric heat transfer fluid has a dielectric constant greater than or equal to 78 at 25°C.

[0050] According to one embodiment, the dielectric heat transfer fluid comprises at least one compound chosen from a mineral oil, a synthetic oil, a fluorinated ether, a silicone, and a fluorinated hydrocarbon.

[0051] According to one embodiment, the fluorinated hydrocarbon is selected from a perfluorohexane, a perfluoromethylcyclohexane, a perfluoro-1,3-dimethylcyclohexane, a perfluorodecalin, a perfluoromethyldecalin, a trichlorofluoromethane and a trichlorotrifluoroethane.

[0052] According to one embodiment, the second fluid comprises at least one refrigerant liquid. In other words, the second fluid may comprise a refrigerant liquid or a mixture between one or more refrigerant liquids and one or more other fluids.

[0053] According to one embodiment, the refrigerant liquid is selected from a hydrochlorofluorocarbon (HCFC), a hydrofluorocarbon (HFC) and a carbon dioxide.

[0054] According to one embodiment, the hydrofluorocarbon is chosen from 1,1,1,2-tetrafluoroethane and 2,3,3,3-tetrafluoropropene.

[0055] According to one embodiment, the purification device is a first purification device arranged in the first distribution chamber, the plate bundle comprises a first discharge chamber configured to collect the first fluid having traveled the first circulation path, and the heat exchanger comprises a second purification device arranged in the first discharge chamber.

[0056] According to one embodiment, the purification device is a first purification device arranged in the first distribution chamber and in which the heat exchanger comprises a second purification device arranged in the second distribution chamber.

[0057] According to one embodiment, the second purification device comprises an openwork support defining a perimeter of the second purification device and a compartment of the second purification device.

[0058] According to one embodiment, the second purification device comprises at least one filter and / or at least one desiccant.

[0059] According to one embodiment, the filter of the second purification device comprises at least one filtering surface, the filtering surface being arranged circumferentially to the support.

[0060] According to one embodiment, the filtering surface of the second purification device has a porosity of between 10µm and 500µm.

[0061] According to one embodiment, the desiccant of the second purification device comprises at least one water-absorbing element chosen from a silica gel, a magnesium sulfate, a calcium chloride, a calcium sulfate, a lithium chloride, and a molecular sieve, for example a zeolite.

[0062] According to one embodiment, the desiccant of the second purification device comprises a pocket arranged in the compartment of the second purification device, the water-absorbing element being arranged in the pocket.

[0063] According to one embodiment, the invention further provides a system for cooling an electrical storage device for motor vehicles. The system comprises a heat exchanger according to the invention, a loop thermally coupled with the electrical storage device and in communication with the first circulation path of the exchanger, and a circuit in communication with the second circulation path of the heat exchanger.

[0064] According to one embodiment, the loop is traversed by a dielectric heat transfer fluid, and the circuit is traversed by a refrigerant liquid.

[0065] According to one embodiment, the invention provides a vehicle comprising a heat exchanger according to the invention and / or a cooling system according to the invention. According to one embodiment, the invention provides a method for replacing a used purification device. The replacement method comprises a step of emptying an exchanger according to one of the preceding claims, a step of extracting the used purification device from the distribution chamber and a step of introducing a replacement purification device into the distribution chamber.

[0066] Other characteristics and advantages of the invention will become apparent from the following description on the one hand, and from several examples of embodiment given for informational and non-limiting purposes with reference to the attached schematic drawings on the other hand, in which: [ fig 1 ] is a schematic perspective view of a heat exchanger comprising a purification device according to a first embodiment of the invention seen from a first viewing angle; [ fig 2 ] is a schematic perspective view of a plate of a heat exchanger core of the figure 1 ; [ fig 3 ] is a schematic view of the plate bundle of the heat exchanger of the figure 1 ; [ fig 4 ] is a truncated sectional view along a plane parallel to the YZ plane of a heat exchanger capable of accommodating a purification device according to the first embodiment; [ fig 5 ] is a truncated sectional view according to a viewing angle of a heat exchanger capable of accommodating a purification device according to a second embodiment; [ fig 6 ] is a truncated sectional view along a plane parallel to the YZ plane of a heat exchanger comprising a purification device according to a third embodiment; [ fig 7 ] is a truncated sectional view along a plane parallel to the YZ plane of a heat exchanger comprising a purification device according to a fourth embodiment; [ fig 8 ] is a perspective view in section at one viewing angle of a heat exchanger comprising a purification device according to a fifth embodiment; [ fig 9 ] is a truncated sectional view along a plane parallel to the YZ plane of a heat exchanger comprising a purification device according to a sixth embodiment; [ fig 10 ] is a truncated sectional view along a plane parallel to the YZ plane of a heat exchanger comprising a purification device according to a seventh embodiment.

[0067] It should first be noted that while the figures set out the invention in detail for its implementation, they can of course be used to better define the invention where appropriate. It should also be noted that, throughout the figures, elements that are similar and / or fulfill the same function are indicated by the same numbering.

[0068] In the following description, a direction of a longitudinal axis X, a direction of a transverse axis Y, and a direction of a vertical axis Z are represented by a trihedron (X, Y, Z) in the figures. A horizontal plane is defined as a plane perpendicular to the vertical axis, a longitudinal plane as a plane perpendicular to the transverse axis, and a transverse plane as a plane perpendicular to the longitudinal axis.

[0069] The heat exchanger 1 according to the invention can be used in a cooling system, in particular for cooling cells of an electric battery. The cooling system comprises a heat exchanger according to the invention, a loop thermally coupled with the electrical storage device and in communication with a first circulation path 6 (represented by the arrows 6) of the heat exchanger 1, and a circuit in communication with a second circulation path 7 (represented by the arrows 7) of the heat exchanger 1.

[0070] There figure 1 shows in perspective a heat exchanger 1 according to the invention used in particular to cool cells of an electric battery. This exchanger could also be used to cool and / or heat other components located in a motor vehicle.

[0071] The heat exchanger implements an exchange of calories between a first fluid and a second fluid, the first fluid then being cooled by the second fluid. The first fluid is advantageously a heat transfer fluid or a mixture between one or more heat transfer fluids and one or more other fluids, the heat transfer fluid(s) being selected from among the authorized heat transfer fluids and adapted to the use made of them. The heat transfer fluid(s) are in particular dielectric heat transfer fluids. A dielectric heat transfer fluid is a heat transfer fluid devoid of electrical charges capable of moving macroscopically. The dielectric heat transfer fluid cannot therefore conduct electric current. In other words, a breakdown voltage of the dielectric heat transfer fluid is sufficiently high to prevent any conduction of electric current in the electric battery.

[0072] Such dielectric heat transfer fluids may be in the form of dielectric liquids. The dielectric heat transfer fluids may be, for example, a mineral oil, a synthetic oil, a fluorinated ether, a silicone or a fluorinated hydrocarbon. A fluorinated hydrocarbon is preferably chosen from perfluorohexane, perfluoromethylcyclohexane, perfluoro-1,3-dimethylcyclohexane, perfluorodecalin, perfluoromethyldecalin, trichlorofluoromethane and trichlorotrifluoroethane.

[0073] In the case where the heat transfer fluid is in direct contact with electric battery cells, liquids with a dielectric constant greater than or equal to 78 at 25°C are preferred.

[0074] The second fluid is preferably a refrigerant or a mixture of one or more refrigerants and one or more other fluids, the refrigerant(s) being selected from among the authorized refrigerants and suitable for the use made of them. The refrigerant(s) are in particular refrigerant liquids from the hydrochlorofluorocarbon (HCFC) family, or hydrofluorocarbons. The refrigerant may in particular be R134a known as 1,1,1,2-tetrafluoroethane, or 1234YF also called 2,3,3,3-tetrafluoropropene. The refrigerant may also be carbon dioxide known by the acronym R744.

[0075] In reference to the figure 1 , the heat exchanger 1 comprises a bundle 2 formed by a stack of plates 3, superimposed on each other along a stacking axis E, parallel to the vertical axis Z. The heat exchanger 1, and therefore the bundle 2, comprises a first longitudinal end 10 and a second longitudinal end 11 opposite the first longitudinal end along the longitudinal axis X. The first longitudinal end 10 and the second longitudinal end 11 are opposite relative to a center 12 of the heat exchanger 1.

[0076] The heat exchanger 1, and therefore the bundle 2, comprises a first transverse end 13 and a second transverse end 14 opposite the first transverse end 13 along the transverse axis Y. The first transverse end 13 and the second transverse end 14 are opposite relative to the center 12 of the heat exchanger 1.

[0077] The beam 2 comprises an upper cheek 4 and a lower cheek 5 which delimit the beam 2 along the stacking axis E. Between these two cheeks 4, 5 are arranged the plates 3 which delimit two distinct circulation paths: a first circulation path 6 configured to be traveled by the first fluid and a second circulation path 7 configured to be traveled by the second fluid.

[0078] An example of plate 3 is shown in figure 2 . Two immediately adjacent plates 3 define a circulation tube through which the first fluid or the second fluid can circulate. The circulation tubes arranged for the circulation of the first fluid, called first circulation tubes, alternate with the conduits arranged for the circulation of the second fluid, called second circulation tubes. Thus, a first plate 3 can be arranged for the circulation of the first fluid in collaboration with a second adjacent plate 3, and be arranged for the circulation of the second fluid in collaboration with a third adjacent plate 3. The same plate 3 is thus licked on one side by the first fluid and on the other by the second fluid.

[0079] The set of first circulation tubes forms the first circulation path 6. The set of second circulation tubes forms the second circulation path 7.

[0080] As visible on the figure 2 , each plate 3 has the shape of a bathtub, that is to say that it comprises a bottom 30 surrounded by a peripheral edge 31. The bottom 30 has the shape of a rectangle with rounded corners. The peripheral edge 31 surrounding the bottom extends continuously all around the plate 3.

[0081] The plates 3 are stacked on top of each other, an upper face 32 of a first plate 3 facing a lower face 33 of an adjacent second plate 3. Similarly, a lower face 33 of the first plate 3 faces an upper face 32 of an adjacent third plate 3.

[0082] The plates 3 are manufactured by stamping, embossing or rolling a strip of a material designed to allow sufficient heat exchange to enable the heat exchanger 1 to fulfill its role. This may in particular be aluminum or an aluminum alloy.

[0083] The plates 3 comprise at least one disturbance device 34 illustrated in the figure 2 and arranged to disturb the circulation of the fluid or fluids circulating along the plates 3. This makes it possible to improve the heat exchanges between the first fluid and the second fluid. The disturbance device 34 is for example made of a single material with the plates 3, that is to say that they form a single block of material with the plate 3 in which it is formed. The disturbance device 34 can therefore be made from the manufacturing process of the plate 3, and is for example stamped at the same time as the plate 3.

[0084] The disturbance device 34 extends over the upper face 32 and over the lower face 33 of the bottom 30 along the vertical axis Z and extends between the first longitudinal end 10 and the second longitudinal end 11 of the plate 3. In the example illustrated in the figure 2 , the disturbance device 34 takes the form of chevrons, that is to say a succession of V-shaped grooves seen in a plane perpendicular to the vertical axis Z, that is to say in the horizontal plane.

[0085] Each plate 3 further comprises holes 35. In the example of the invention, the plates 3 each comprise four holes, arranged at each of the corners of the plate 3 and arranged in the bottom 30. The plates thus comprise a first hole 35a, a second hole 35b, a third hole 35c and a fourth hole 35d. The holes 35 have a circular shape. The holes 35 are through-holes. These holes 35 are arranged to allow the passage of the first fluid or the second fluid.

[0086] In reference to the figures 2 à 4 , the first hole 35a is arranged at the angle of the first longitudinal end 10 and the first transverse end 13. When the plates 3 are stacked and form the bundle 2, the first holes 35a are then aligned with each other and form a first distribution chamber 15 for the first fluid in the first circulation path 6. The first distribution chamber 15 is bordered by the outline of the first holes 35a, the lower cheek 5 and the upper cheek 4. It therefore has the shape of a right cylinder with a circular base. The first distribution chamber 15 makes it possible to distribute the first fluid in the first circulation tubes. The first distribution chamber accommodates a purification device 100, seen on the figure 4 The first circulation tubes form the first circulation path 6.

[0087] As illustrated by the figures 2 And 3, the second hole 35b is arranged at the angle of the first longitudinal end 10 and the second transverse end 14. When the plates 3 are stacked and form the bundle 2, the second holes 35b are then aligned with each other and form the second distribution chamber 17 of the second fluid of the second circulation path 7. The second distribution chamber 17 is bordered by the outline of the second holes 35b, the lower cheek 5 and the upper cheek 4. It therefore has the shape of a right cylinder with a circular base. The second distribution chamber 17 makes it possible to distribute the second fluid in the second circulation tubes forming the second circulation path 7.

[0088] In reference to the figures 2 à 3 , the third hole 35c is arranged at the angle of the second longitudinal end 11 and the first transverse end 13. When the plates 3 are stacked and form the bundle 2, the third holes 35c are then aligned with each other and form a second evacuation chamber 18 for the second fluid in the second circulation path 7. The second evacuation chamber 18 is bordered by the outline of the third holes 35c, the lower cheek 5 and the upper cheek 4. It therefore has the shape of a right cylinder with a circular base. The second evacuation chamber 18 makes it possible to collect the second fluid distributed in the second circulation tubes and to send it to the circuit in communication with a second circulation path 7.

[0089] As shown by the figures 2 And 3, the fourth hole 35d is arranged at the angle of the second longitudinal end 11 and the second transverse end 14. When the plates 3 are stacked and form the bundle 2, the fourth holes 35d are then aligned with each other and form a first evacuation chamber 16 for the first fluid. The first evacuation chamber 16 is bordered by the outline of the fourth holes 35d, the lower cheek 5 and the upper cheek 4. It therefore has the shape of a right cylinder with a circular base. The first evacuation chamber 16 makes it possible to collect the first fluid distributed in the first circulation tubes and to send it to the loop thermally coupled with the electrical storage device.

[0090] To obtain the bundle 2 of plates 3, the different plates 3 are stacked according to the stacking direction E. All of the plates 3 are then brazed using a brazing process by passing them through a furnace. This step secures the different plates 3 together.

[0091] As illustrated on the figures 2 à 4 , the bundle 2 comprises upper mouths 40 to allow the distribution chambers 15, 17 and the evacuation chambers 16, 18 to be open to the outside of the bundle 2. In the example of the invention, the bundle 2 comprises four upper mouths 40 formed at the level of the upper cheek 4 and arranged in line with the holes 35 of the plates 3. The upper cheek 4 thus comprises a first upper mouth 40a arranged in line with the holes 35a, a second upper mouth 40b arranged in line with the holes 35b, a third upper mouth 40c arranged in line with the holes 35c, and a fourth upper mouth 40d arranged in line with the holes 35d. The upper mouths 40 have a substantially circular shape in the horizontal plane. The upper mouths 40 are through-holes.

[0092] The first upper mouth 40a delimits a first upper orifice 36 of the first distribution chamber 15. The second upper mouth 40b delimits a second upper orifice 37 of the second distribution chamber 17. The third upper mouth 40c delimits a second upper hole 38 of the second evacuation chamber 18. The fourth upper mouth 40d delimits a first upper hole 39 of the first evacuation chamber 16.

[0093] The heat exchanger 1 further comprises interfaces 19 for connecting these circulation paths with external circulation paths. Thus, a portion of the interfaces 19 connects the thermally coupled loop with the electrical storage device with the first circulation path 6 of the heat exchanger 1. Another portion of the interfaces 19 makes it possible to connect the second circulation path 7 of the heat exchanger 1 to the circuit.

[0094] In the example of the invention according to a first embodiment illustrated in figures 1 à 4 , the heat exchanger 1 comprises a first interface 19a so that the first fluid from the loop can enter the heat exchanger 1 through the first upper orifice 36 of the first distribution chamber 15.

[0095] The heat exchanger 1 further comprises a second interface 19b so that the second fluid from the circuit can enter the heat exchanger 1 via the second upper orifice 37 of the second distribution chamber 17.

[0096] The heat exchanger 1 also comprises a third interface 19c through which the second fluid can exit the heat exchanger 1 through the second upper hole 38 of the second discharge chamber 18 and rejoin the circuit.

[0097] The heat exchanger 1 further comprises a fourth interface 19d through which the first fluid can exit the heat exchanger 1 through the first upper hole 39 of the first discharge chamber 16 and rejoin the loop.

[0098] In the first embodiment illustrated in the figure 4 , the first interface 19a takes the form of a sleeve. The first interface 19a comprises a lower base 21 and an upper base 22 opposite the lower base 21. These bases are arranged along the vertical axis Z. The lower base 21 is closer to the first upper mouth 40a than the lower base 21. The lower base 21 is connected to the upper base 22 by a passage 20. Thus, the circulation of the first fluid of the loop in the distribution chamber 15 is possible. The passage 20 is therefore in line with the first upper orifice 36 of the first distribution chamber 15. The first interface 19a extends from the first upper mouth 40a of the upper cheek 4 towards the side opposite the bundle 2 in the vertical direction Z. The passage 20 extends perpendicularly to the horizontal plane as defined previously.The first upper mouth 40a is therefore an admission opening for the first fluid into the first distribution chamber of the bundle 2 of the heat exchanger 1.

[0099] The first interface 19a further comprises a flange 23 at the lower base 21 configured to cooperate with the purification device 100. The flange 23 extends from the lower base 21 radially relative to the vertical axis Z. The flange 23 is flush with a contour of the lower base. The first interface 19a and the flange 23 are made in one piece. Furthermore, the first interface 19a comprises a first groove 24 in the vicinity of the flange 23. The first groove 24 is arranged circumferentially on the outside of the first interface 19a. The first groove 24 accommodates a first O-ring 26 which is a sealing member. The first O-ring 26 may comprise an elastomer. The first interface 19a comprises a second groove 25 in the vicinity of the first groove 24. The second groove 25 is arranged circumferentially on the outside of the first interface 19a. The second groove 25 accommodates an axle pin 48.The first groove 24 is arranged between the flange 23 and the second groove 25 along the vertical axis Z.

[0100] The second interface 19b is in the form of a square-based cylinder. This second interface 19b is provided with a passage 20 arranged to allow the transfer of the second fluid from the circuit into the second distribution chamber 17. The passage 20 is therefore in line with the second upper orifice 37 of the second distribution chamber 17. The square-based cylinder 19b extends from the second mouth 40b of the upper cheek 4 towards the side opposite the beam in the vertical direction Z. Two adjacent corners of the square-based cylinder 19b are rounded.

[0101] The third interface 19c is in the form of a square-based cylinder. This third interface 19c is provided with a passage 20 arranged to allow the transfer of the second fluid from the second discharge chamber 18 to the circuit. The passage is therefore in line with the second upper hole 38 of the second discharge chamber 18. The square-based cylinder 19c extends from the third mouth 40c of the upper cheek 4, on the side opposite the beam in the vertical direction Z. Two adjacent corners of the square-based cylinder 19c are rounded.

[0102] The fourth interface 19d takes the form of a sleeve. The sleeve is in the example of the figure 1 with a circular base. The sleeve is provided with a passage 20 in its center to allow the transfer of the first fluid from the first evacuation chamber 16 to the loop thermally coupled with the electrical storage device. The sleeve 19d extends from the vicinity of the fourth upper mouth 40d of the upper cheek towards the side opposite the beam in the vertical direction Z. The passage 20 is therefore in line with the first upper hole 37 of the first evacuation chamber 16.

[0103] In the first embodiment illustrated in the figure 4 , the lower cheek 5 comprises a recess 41. This recess 41 is arranged on a face of the cheek facing the plates 3. It has a circular bottom whose walls are slightly flared. The recess 41 is arranged in line with the alignment of the first holes 35a so as to form a bottom of the first distribution chamber 15. The recess 41 is intended to accommodate a part of the purification device 100.

[0104] As illustrated on the figure 4 , the heat exchanger 1 comprises a purification device 100 arranged in the first distribution chamber 15. At least a portion of the purification device 100 comprises a shape substantially complementary to a shape of the first distribution chamber 15 in which it is partly arranged. The first distribution chamber 15 being a right cylinder with a circular base, the purification device 100 therefore has a portion in the shape of a right cylinder with a circular base. The purification device 100 extends in a direction of extension substantially parallel to the vertical axis Z. The purification device 100 has a first vertical end 101 and a second vertical end 102 opposite the first vertical end 101 along the vertical axis Z.

[0105] The purification device 100 comprises a container 103 having a side wall 104. The side wall 104 has a circular cross-sectional shape and is generally symmetrical around the vertical axis Z. In addition, the side wall 104 has three windows. The container 103 delimits the cylindrical periphery of the purification device 100. The container 103 is closed at the first vertical end 101 by a base 105. The side wall 104 and the base 105 are made in one piece. The base 105 rests in the recess 41 of the lower cheek 5. The container 103 is therefore an openwork support defining a periphery of the purification device 100 and a compartment of the purification device 100.

[0106] The container 103 has an opening 106 at the second vertical end 102. The opening 106 is delimited by an edge 107. In the context of the example illustrated in the figure 4 , the container 103 comprises, at the opening 106, a flange 108 configured to cooperate with the flange 23 of the first interface 19a. The flange 108 takes a toroidal shape seen in the horizontal plane. The dimensions measured in a horizontal plane of the flange 108 of the purification device 100 correspond to the dimensions measured in a horizontal plane of the toroidal shape of the flange 23 of the first interface 19a. Thus, the flow of the first fluid from the loop enters the purification device 100 before entering the first circulation tubes. The flange 108 of the container 103 is integral with the side wall 104. The flange 108 is located outside the bundle 2.

[0107] The flange 108 includes a rail 109 that accommodates a second O-ring 110, which is also a seal. The second O-ring may, for example, include an elastomer. The rail 109 extends circumferentially over a radial end of the flange 108.

[0108] The purification device 100 also comprises a filter. The filter takes the form of a filtering surface 111. The filtering surface 111 is arranged circumferentially in the container 103. The filtering surface 111 has a porosity such that particles present in the first fluid whose size could damage the heat exchanger 1 by abrasion, for example the plates 3 of the bundle 2, cannot pass through the filtering surface 111. The filtering surface 111 has a porosity of between 10 µm and 500 µm. In other words, a maximum dimension of the particles retained by the filtering surface is between 10 µm and 500 µm. The filtering surface 111 is arranged in the container 103 so as to cover the windows. The filtering surface 111 is pressed against the windows. The filtering surface 111 is also arranged in the container 103 so that the majority of pores are arranged in line with the windows.

[0109] One method of manufacturing the purification device 100 is to arrange the filtering surface 111 in a mold and then inject material to overmold the container 103 onto the filtering surface 111. The material may in particular be aluminum or an aluminum alloy.

[0110] To remove the water mixed with the first fluid, the purification device 100 further comprises a desiccant comprising at least one water-absorbing element chosen from a silica gel, a magnesium sulfate, a calcium chloride, a calcium sulfate, a lithium chloride, and a molecular sieve, for example a zeolite. The desiccant comprises a pocket (not shown) permeable to the first fluid in which the water-absorbing element is conditioned. This pocket is placed in the compartment.

[0111] In the first embodiment illustrated in figures 1 And 3, holding the purification device 100 in position in the heat exchanger 1 and holding the purification device 100 at the first interface 19a uses a fixing sleeve 42. The fixing sleeve 42 has a general ring shape. Three fixing lugs 43 extend from an upper contour of the fixing sleeve 42 towards the connection flange 108 of the purification device 100 along the vertical axis Z. A lower contour of the fixing sleeve 42, opposite the upper contour, is brazed to the first upper mouth 40a of the bundle 2.

[0112] Maintaining the purification device 100 in position in the heat exchanger 1 and maintaining the purification device at the first interface 19a also requires a connection sleeve 44. The connection sleeve 44 has a generally cylindrical shape with a circular base. The connection sleeve 44 comprises a groove 45 arranged circumferentially on the outer wall of the connection sleeve 44 in order to cooperate with the fixing lugs 43 of the fixing sleeve 42. When the fixing lugs 43 of the fixing sleeve 42 cooperate with the groove 45, the connection sleeve 44 is crimped to the bundle 2 via the fixing sleeve 42.

[0113] The connection sleeve 44 further comprises two hollows 46 arranged on a part of the circumference, that is to say on the outer wall of the connection sleeve 44. The two hollows 46 are diametrically opposite relative to the vertical axis Z. These hollows 46 serve to house a pin of axis 48, for example a circlip.

[0114] The recesses 46 comprise two openings opening onto the second groove 25 of the first interface 19a. The two openings are diametrically opposed. Each opening allows a portion of the pin 48 to pass through, which is housed in the second groove 25 of the first interface 19a.

[0115] Following the crimping of the connection sleeve 44 to the fixing sleeve 42, the purification device 100 is introduced into the distribution chamber 15 through the first upper orifice 36 of the distribution chamber 15. The base 105 of the container 103 then comes into contact with the recess 41. The flange 108 of the purification device 100 is located outside the distribution chamber 15 and inside the connection sleeve 44. Then, the first interface 19a is inserted into the connection sleeve 44 so that the flange 23 of the first interface 19a cooperates with the flange 108 of the purification device 100. Then, the axis pin 48 is positioned in the recesses 46, and each hole is then crossed by a part of the axis pin 48 to be housed in the second groove 25.The pin 48 is elastically deformed, which ensures that the first interface 19a and the purification device 100 are held in position at the connection socket 44. The seal between the bundle 2 and the purification device 100 is ensured by the second O-ring 110 housed in the rail 109, the compression of which is ensured by the positioning of the pin 48. The seal between the connection socket 44 and the first interface 19a is ensured by the first O-ring 26 housed in the first groove 24, the compression of which is ensured by the pin 48, which therefore makes it possible to maintain the assembly comprising the purification device 100 and the first interface 19a in the heat exchanger 1. In other words, the sealed connection between the bundle 2, the purification device 100 and the first interface 19a is ensured by the compression of the two O-rings thanks to the pin axis 48.

[0116] In this embodiment, the locking system of the purification device 100 which allows the purification device 100 to be fixed to the bundle 2 of plates 3, comprises the fixing sleeve 42, the connecting sleeve 44, the rail 109 with the O-ring 110, and the axle pin 48.

[0117] In order to change the purification device 100 of the heat exchanger 1 of this first embodiment, it is first necessary to remove the pin 48. By removing the pin 48, the first interface 19a and the purification device 100 are detached from the connection socket 44 and therefore from the bundle 2 of plates 3. The heat exchanger 1 can then be purged of the first fluid. Then, the purification device 100 can be extracted through the first upper orifice 36 from the first distribution chamber 15. Once the purification device 100 has been extracted, the first distribution chamber 15 is empty and ready to accommodate another purification device 100.

[0118] There figure 5 shows a second embodiment of the purification device according to the invention. This second embodiment shows that it is possible to adapt the shape of the container to the shape of the first distribution chamber. The second embodiment illustrated in the figure 5 is identical to the first embodiment described except for the holes 35 of the plates 3, the shape of the container 103 of the purification device 100, and the disturbance device 34 of the first embodiment. For identical elements, reference will be made to the description of the figures 1 à 4 described above.

[0119] In reference to the figure 5 , the holes 235a of the plates 3 of the bundle 2 have a substantially triangular shape. The first distribution chamber 15 then has the shape of a right cylinder with a triangular base. The second distribution chamber and the evacuation chambers may also have the shape of a right cylinder with a triangular base if all the corresponding holes of the plates 3 of the bundle 2 have a substantially triangular shape.

[0120] The heat exchanger 1 comprises a purification device 200 configured to cooperate with the distribution chamber 15. To be able to accommodate the purification device 200 in the distribution chamber, the shape of the container 204 of the purification device 200 is then also a right cylinder with a triangular base. The container is surmounted by a toric flange as in the first embodiment.

[0121] As illustrated on the figure 5 , the disturbance device 134 can take another form such as studs 50 distributed uniformly on the lower face 33. It can also be arranged on the upper face of the plate 3. These studs 50 extend from the lower face along the vertical axis Z. The disturbance device 134 comprises a wall 51 which extends from the first longitudinal end 10 to the vicinity of the second longitudinal end of the plate 3. It extends from the lower face 33 along the vertical axis Z. Each wall 51 divides the lower face 33 of the plate 3 into two equal parts.

[0122] The assembly and disassembly of the heat exchanger 1 in this second embodiment is identical to the assembly and disassembly of the first embodiment explained above.

[0123] There figure 6 illustrates a third embodiment of the purification device according to the invention. This third embodiment aims to reduce the number of parts to be assembled to place the purification device 300 in the heat exchanger 1, by making the purification device 300 and the first interface 319a a part made of a single material and therefore a single piece. The third embodiment illustrated on the figure 6 is identical to the first embodiment except for the purification device and the first interface in the first embodiment. For clarity, plates 3 have been omitted in the figure 6 . For identical elements, please refer to the description of the figures 1 à 4 described above.

[0124] As illustrated on the figure 6 , the heat exchanger 1 comprises a purification device 300 arranged in the first distribution chamber. At least a portion of the purification device 300 comprises a shape substantially complementary to a shape of the first distribution chamber in which it is partly arranged. The first distribution chamber being a right cylinder with a circular base, the purification device 300 therefore has a portion in the shape of a right cylinder with a circular base. The purification device 300 extends in a direction of extension substantially parallel to the vertical axis Z. The purification device 300 has a first vertical end 301 and a second vertical end 302 opposite the first vertical end 301 along the vertical axis Z.

[0125] The purification device 300 comprises a container 303 having a side wall 304. The side wall 304 has a circular cross-sectional shape and is generally symmetrical around the vertical axis Z. In addition, the side wall 304 has three windows. The container 303 delimits the cylindrical periphery of the purification device 300. The container 303 is closed at the first vertical end 301 by a base 305. The side wall 304 and the base 305 are made in one piece. The base 305 rests in the recess 41 of the lower cheek 5. The container 303 is therefore an openwork support defining a periphery of the purification device 300 and a compartment of the purification device 300.

[0126] The container 303 has an opening 306 at the second vertical end 302. In the context of the example illustrated in the figure 4 , the container 303 comprises a flange 308 at the opening 306. The flange 308 extends radially relative to the vertical axis Z. The flange 308 of the container 303 is integral with the side wall 304. The flange 308 is located outside the bundle 2 of plates 3.

[0127] The opening 306 is surmounted by the first interface 319a. The first interface 319a has the shape of a sleeve having a passage 20. Thus, the flow of the first fluid from the loop enters the purification device 300 before entering the first circulation tubes. The container 303 and the first interface 319a are made in one piece, that is to say that it forms a single block, in other words a single block of material. They are no longer two separate pieces as in the first embodiment.

[0128] The locking system of the purification device 300 to the bundle 2 of plates 3 is located at the flange 308. It comprises a first groove 324 which accommodates an O-ring 326, which is a sealing member. The O-ring 326 may comprise, for example, an elastomer. The first groove 324 extends circumferentially over a radial end of the flange 308.

[0129] The locking system of the purification device 300 further comprises a second groove 325 in the vicinity of the first groove 324. The second groove 325 is arranged circumferentially on the outside of the flange 308. The second groove 325 accommodates at least in part a pin of axis 48. The second groove 325 is arranged between the second end 304 and the first groove 325 along the vertical axis Z.

[0130] The purification device 300 also comprises a filter taking the form of a filtering surface identical to the filtering surface 111 described in the first embodiment.

[0131] One method of manufacturing the purification device 300 is to arrange the filtering surface 111 in a mold and then inject material to overmold the container 303 onto the filtering surface 111 and the first interface 319a. The material may in particular be aluminum or an aluminum alloy.

[0132] To remove the water mixed with the first fluid, the purification device 300 comprises at least one desiccant housed in the container 303. The desiccant of the purification device 300 is identical to that described in the first embodiment.

[0133] In the third embodiment illustrated in the figure 6 , the locking system of the purification device 300 also comprises the fixing sleeve 42 described in the first embodiment.

[0134] Maintaining the purification device 300 integral with the first interface 319a to the beam 2 in position requires that the locking system also includes the connection socket 44 described in the first embodiment. In the embodiment illustrated in the figure 6 , the two holes in the hollows 46 of the connection sleeve 44 open onto the second groove 325 of the flange 308. Each hole allows a part of the pin 48 of the locking system to pass through, which is housed in the second groove 325.

[0135] Following the crimping of the connection sleeve 44 to the fixing sleeve 42, the purification device 300 is introduced into the distribution chamber through the first upper orifice 36 of the distribution chamber. The base 305 of the container 303 then comes into contact with the recess 41. The flange 308 of the purification device 300 is located outside the distribution chamber and inside the connection sleeve 44. Then, the pin 48 is positioned in the recesses 46, and each hole is then crossed by a portion of the pin 48 to be housed in the second groove 325. The pin 48 is elastically deformed which ensures that the one-piece purification device 300 is held in position with the first interface 319a in the heat exchanger thanks to the connection sleeve 44.

[0136] The seal between the bundle 2 and the purification device 300 is ensured by the O-ring 326 housed in the first groove 324, the compression of which is ensured by the positioning of the pin 48. The seal between the connection sleeve 44 and the first interface 319a is ensured by the O-ring 326 housed in the first groove 324, the compression of which between the flange 308 and the connection sleeve 44 is ensured by the pin 48, which therefore makes it possible to maintain the purification device 300 made of the same material as the first interface 319a on the bundle 2 of the heat exchanger 1.

[0137] In other words, the sealed connection between the beam 2 and the purification device 300 is ensured by the compression of the O-ring 326 made by positioning the axis pin 48 in the second groove 325.

[0138] In order to change the purification device 300 of the heat exchanger 1 of this third embodiment, it is first necessary to remove the pin 48. By removing the pin 48, the purification device 300 is detached from the connection sleeve 44 and therefore from the bundle 2 of plates 3. The heat exchanger 1 can then be purged of the first fluid. Then, the purification device 300 can be extracted by orienting the first upper orifice 36 of the first distribution chamber. Once the purification device 300 has been extracted, the first distribution chamber is empty and ready to accommodate another purification device 300.

[0139] There figure 7 illustrates a fourth embodiment of the purification device 400 according to the invention. This fourth embodiment aims in particular to reduce the number of parts to be assembled to place the purification device 400 in the heat exchanger 1, by eliminating the fixing sleeve 42 and the connection sleeve 44 of the first embodiment. The fourth embodiment illustrated on the figure 7 is identical to the first embodiment except for the purification device 400 and the first interface 419a. For identical elements, reference will be made to the description of the figures 1 à 4 described above.

[0140] As illustrated on the figure 7 , the heat exchanger 1 comprises a purification device 400 arranged in the first distribution chamber 15. At least a part of the purification device 400 comprises a shape substantially complementary to a shape of the first distribution chamber 15 in which it is partly arranged. The first distribution chamber 15 being a straight cylinder with a circular base, the purification device 400 therefore has a part in the shape of a straight cylinder with a circular base.

[0141] The purification device 400 extends in an extension direction substantially parallel to the vertical axis Z. The purification device 400 has a first vertical end 401 and a second vertical end 402 opposite the first vertical end 401 along the vertical axis Z.

[0142] The purification device 400 comprises a container 403 having a side wall 404. The side wall 404 has a circular cross-sectional shape and is generally symmetrical around the vertical axis Z. In addition, the side wall 404 has three windows. The container 403 delimits the cylindrical periphery of the purification device 400. The container 403 is closed at the first vertical end 401 by a base 405. The side wall 404 and the base 405 are made in one piece. The base 405 rests in the recess 41 of the lower cheek 5. The container 403 is therefore an openwork support defining a periphery of the purification device 400 and a compartment of the purification device 400.

[0143] The container 403 has an opening 406 at the second vertical end 402. The opening 406 is delimited by an edge 407. In the context of the example illustrated in the figure 7 , the container 403 comprises a collar 408 which extends substantially vertically along the vertical axis Z from the edge 407 towards the side opposite the container 403. The collar 408 has a diameter greater than a diameter of the container 403 seen in the horizontal plane as defined previously. The collar 408 is integral with the container 403. The collar 408 is located outside the bundle 2 of plates 3 when the purification device 400 is in place in the heat exchanger 1.

[0144] The collar 408 cooperates with the first interface 419a so that the flow of the first fluid from the loop enters the purification device 400 before entering the first circulation tubes. Thus, the collar 408 is housed inside the pass 20 of the first interface 419a.

[0145] The collar 408 of the purification device 400 comprises a system for locking the purification device 400 to the first interface 419a. The locking system comprises a first groove 424 which accommodates a first O-ring 427 which is a sealing member. The first O-ring 427 may comprise, for example, an elastomer. The first groove 424 extends circumferentially over a radial end of the collar 408.

[0146] The locking system of the collar 408 comprises a second groove 425 in the vicinity of the first groove 424. The second groove 425 is arranged circumferentially on the outside of the collar 408. The second groove 425 accommodates an axle pin 48.

[0147] The locking system of the collar 408 comprises a third groove 426 in the vicinity of the second groove 425. The third groove is arranged circumferentially on a radial end of the collar 408. The second groove 425 is arranged between the first groove 424 and the third groove 426 along the vertical axis Z. The third groove 426 houses a second O-ring 428 which is a sealing member. The second O-ring 428 may comprise an elastomer.

[0148] The purification device 400 also comprises a filter. The filter comprises a filter surface, which is identical to the filter surface 111 of the first embodiment.

[0149] One method of manufacturing the purification device 400 is to arrange the filtering surface 111 in a mold and then inject material to overmold the container 403 onto the filtering surface 111 with the collar 408. The material may in particular be aluminum or an aluminum alloy.

[0150] To remove the water mixed with the first fluid, the purification device 400 comprises at least one desiccant housed in the container 403. The desiccant of the purification device 400 is identical to that described in the first embodiment.

[0151] The first interface 419a has the general shape of a sleeve having a passage 20. A diameter of the passage 20 is greater than a diameter of the collar 418 in the horizontal plane. The first interface 419a comprises two hollows 446 arranged radially on an outer wall of the sleeve. The two hollows 446 are diametrically opposite relative to the vertical axis Z. These hollows 446 serve to house the axis pin 48.

[0152] The recesses 446 comprise two openings opening onto the second groove 425 of the first interface 419a. The two openings are diametrically opposed. Each opening allows a portion of the pin 48 to pass through, which is housed in the second groove 425 of the first interface 419a.

[0153] Maintaining the purification device 400 in position in the first distribution chamber 15 of the heat exchanger 1 requires, in a first step, brazing the first interface 419a to the upper cheek 4 so that the passage 20 is in communication with the first upper mouth 40a. In a second step, the purification device 400 is introduced into the first distribution chamber 15 by passing it through the passage 20. A third step consists of inserting the pin 48 into the two hollows 446 of the first interface 419a, each hole is then crossed by a part of the pin 48 to be housed in the second groove 425. The pin 48 is elastically deformed which ensures that the purification device 400 is maintained in position with the first interface 419a in the heat exchanger 1.The seal between the beam 2 and the purification device 400 is ensured by the first O-ring 427 and the second O-ring 428 housed respectively in the first groove 424 and the third groove 426. Their compression between the collar 408 and the passage 20 is ensured by the positioning of the axis pin 48 in the second groove 425.

[0154] In order to change the purification device 400 of the heat exchanger 1 of this fourth embodiment, it is first necessary to remove the axis pin 48. By removing the axis pin 48, the purification device 400 is detached from the first interface 419a and therefore from the bundle 2 of plates 3. The heat exchanger 1 can then be purged of the first fluid. Then, the purification device 400 can be extracted from the first distribution chamber 15. Once the purification device 400 has been extracted, the first distribution chamber 15 is empty and ready to accommodate another purification device 400.

[0155] There figure 8 illustrates is a fifth embodiment of the purification device according to the invention. This fifth embodiment is an alternative solution to the axis pin 48 of the fourth embodiment. The fifth embodiment illustrated in the figure 8 is identical to the fourth embodiment except for the collar 408 and the first interface 419a of the fourth embodiment. For clarity, the plates 3 have been omitted on the figure 8 . For identical elements, please refer to the description of the figures 1 à 4 and to the figure 7 described above.

[0156] As illustrated on the figure 8 , the collar 508 of the purification device 500 of the heat exchanger 1 is located outside the bundle 2 of plates when the purification device 500 is in position in the heat exchanger 1.

[0157] The collar 508 cooperates with the first interface 519a so that the flow of the first fluid from the loop enters the purification device 500 before entering the first circulation tubes.

[0158] The collar 508 comprises a system for locking the purification device 500 to the first interface 519a. The locking system comprises a groove 524 which accommodates an O-ring 527 which is a sealing member. The O-ring 527 may comprise, for example, an elastomer. The groove 524 extends circumferentially on a radial end of the collar 508.

[0159] The locking system of the collar 508 of the purification device 500 comprises holding members 548 in the vicinity of the groove 524. Each holding member 548 is arranged from a lower edge 525 of the groove. Each holding member 548 is in the form of a blade 549 which extends from the lower edge 525 towards the bundle 2 along the vertical axis Z. A free end of the blade 549 comprises a lug 550. The lug 550 extends from the free end of the blade towards the side opposite the collar 508. The holding members 548 lock the purification device 500 in the heat exchanger 1 when the purification device 500 is in position in the heat exchanger 1. The holding members 548 are three in number. They are distributed uniformly on the lower edge 525.

[0160] As shown in the figure 8 , the first interface 519a has the general shape of a sleeve having a passage 20. The sleeve has the general shape of a right cylinder with a circular base along the vertical axis Z. The passage 20 comprises a section restriction along the vertical axis Z. Thus, a section of a portion of the passage 20 close to the beam 2 is larger than a section of another portion of the passage 20 far from the beam 2. This section restriction creates a shoulder 551.

[0161] Maintaining the purification device 500 in position in the first distribution chamber of the heat exchanger 1 requires, in a first step, the brazing of the first interface 519a to the upper cheek 4 so that the passage 20 is in communication with the first upper mouth 40a and therefore the first distribution chamber. In a second step, the purification device 500 is introduced into the first distribution chamber by passing it through the passage 20 until the fixing members 548 cooperate with the shoulder 551. In other words, the fixing members 548 snap into place after the lugs 550 have passed the shoulder 551 during the insertion of the purification device 500. The seal between the bundle 2 and the purification device 500 is ensured by the O-ring 527 which is compressed between the collar 508 and the passage 20.

[0162] In order to change the purification device 500 of the heat exchanger 1 of this fifth embodiment, the purification device 500 is unclipped, the purification device 500 can then be extracted from the first distribution chamber. Once the purification device 500 has been extracted, the first distribution chamber is empty and ready to accommodate another purification device 500.

[0163] There figure 9 illustrates a sixth embodiment of the purification device according to the invention. This sixth embodiment illustrates the insertion of the purification device 600 opposite the first upper orifice 36 along the vertical axis Z. The sixth embodiment illustrated on the figure 9 is identical to the first embodiment described except for the recess 41 of the first embodiment, the first interface 19a of the first embodiment and the purification device 100 of the first embodiment. For identical elements, reference will be made to the description of the figures 1 à 4 described above. For more clarity on the figure 9 , the plates of beam 2 are not shown.

[0164] In reference to the figure 9 , the first interface 619a has the general shape of a sleeve having a passage 20. The sleeve has the general shape of a right cylinder with a circular base. The passage 20 is straight.

[0165] The first interface is brazed to the upper cheek 4 so that the passage 20 is in communication with the first upper mouth 40a and therefore with the first upper orifice 36 of the first distribution chamber. The first upper mouth 40a is therefore an admission opening for the first fluid into the first distribution chamber of the bundle 2 of the heat exchanger 1.

[0166] As shown in the figure 9 , the lower cheek 5 comprises a first lower mouth 641 arranged in line with the holes 35a. The first lower mouth 641 delimits a first lower orifice 636 of the first distribution chamber.

[0167] As illustrated on the figure 9 , the heat exchanger 1 comprises a purification device 600 arranged in the first distribution chamber. At least a portion of the purification device 600 comprises a shape substantially complementary to a shape of the first distribution chamber in which it is partly arranged. The first distribution chamber being a right cylinder with a circular base, the purification device 600 therefore has a portion in the shape of a right cylinder with a circular base. The purification device 600 extends in a direction of extension substantially parallel to the vertical axis Z. The purification device 600 has a first vertical end 601 and a second vertical end 602 opposite the first vertical end 601 along the vertical axis Z.

[0168] The purification device 600 comprises a container 603 having a side wall 604. The side wall 604 has a circular cross-sectional shape and is generally symmetrical around the vertical axis Z. In addition, the side wall 604 has three windows. The container 603 delimits the cylindrical periphery of the purification device 600. The container 603 is closed at the first vertical end 601 by a base 605. The purification device 600 therefore comprises a plug in the shape of the base 605 at an end opposite a fluid inlet opening. The side wall 604 and the base 605 are made in one piece. The container 603 is therefore an openwork support defining a periphery of the purification device 600 and a compartment of the purification device 600.

[0169] The second vertical end 602 is housed partly in the first interface 619a, more precisely in the passage 20. The container 603 has an opening 606 at the second vertical end 602. Thus the first fluid entering the passage 20 of the first interface 619a is filtered before entering the first circulation path 6.

[0170] The base 605 comprises a device for fixing the purification device 600 at the first lower mouth 641. The fixing device comprises a first groove 624 which houses an O-ring 626 which is a sealing member. The O-ring 626 may comprise, for example, an elastomer. The first groove 624 extends circumferentially on a radial end of the base 605 relative to the vertical axis Z.

[0171] The fixing device further comprises a second groove 625 which at least partially accommodates a pin of axis 648. The second groove 625 is in the vicinity of the first groove 624. The first groove 624 is arranged between the beam 2 and the second groove 625 along the vertical axis Z.

[0172] The fixing device further comprises an axle pin 648 such as a circlip. The axle pin 648 cooperates with the first groove 625.

[0173] The purification device 600 also comprises a filter which has a filtering surface identical to the filtering surface 111 described in the first embodiment.

[0174] To remove the water mixed with the first fluid, the purification device 600 comprises at least one desiccant housed in the container 603. The desiccant of the purification device 600 is identical to that described in the first embodiment.

[0175] One method of manufacturing the purification device 600 is to arrange the filtering surface 111 in a mold and then inject material to overmold the container 603 onto the filtering surface 111. The material may in particular be aluminum or an aluminum alloy.

[0176] In the sixth embodiment illustrated in the figure 9 , maintaining the purification device 600 in position in the heat exchanger 1 requires a holding sleeve 642. The holding sleeve 642 has a generally cylindrical shape with a circular base. The holding sleeve 642 comprises two hollows 646 arranged on a part of the circumference, that is to say on the outer wall of the holding sleeve 642. The two hollows 646 are diametrically opposed relative to the vertical axis Z. These hollows 646 serve to house the axis pin 648.

[0177] The recesses 646 comprise two holes opening onto the first groove 624 of the base 605. The two holes are diametrically opposed. Each hole allows a portion of the pin 648 to pass through, which is housed in the second groove 625 of the base 605.

[0178] The holding sleeve 642 is brazed with the first lower mouth 641 to fix it on the lower cheek 5 and around the first lower orifice 636 of the distribution chamber. The purification device 600 is introduced into the distribution chamber through the first lower orifice 636 of the distribution chamber. The orifice of the container 606 is housed in the passage 20 of the first interface 619a. A bottom wall of the base 605 extends in the horizontal plane and is flush with the inner side of the holding sleeve 642. Then, the axis pin 648 is positioned in the recesses 646, and each hole is then crossed by a part of the axis pin 648 to be housed in the second groove 625 of the cover. The axis pin 648 is elastically deformed which ensures that the purification device 600 is held in position on the holding sleeve 642 and therefore on the beam 2.The seal between the beam 2 and the purification device 600 is ensured by the O-ring 626 housed in the first groove 624, the compression of which between the holding sleeve 642 and the base 605 is ensured by the positioning of the axis pin 648.

[0179] In order to change the purification device 600 of the heat exchanger 1 of this sixth embodiment, it is first necessary to remove the pin 648. By removing the pin 48, the purification device 600 is detached from the holding sleeve 642 and therefore from the bundle 2. The heat exchanger 1 can then be purged of the first fluid. Then, the purification device 600 can be extracted through the first lower orifice 636 of the first distribution chamber. Once the purification device 600 has been extracted, the first distribution chamber is empty and ready to receive another purification device 600.

[0180] There figure 10 illustrates a seventh embodiment of the purification device according to the invention. This seventh embodiment is identical to the sixth embodiment described with the exception of the base 705 and the fixing device, and the holding sleeve 742. For identical elements, reference will be made to the description of the figure 9 described above. The plates of beam 2 are not shown on the figure 10 for clarity.

[0181] In reference to the figure 10 , the holding sleeve 742 has a general shape of a hollow cylinder with a circular base. The holding sleeve 742 comprises a thread 743 inside the hollow cylinder. The thread 743 is configured to cooperate with a thread of the base 705.

[0182] The fixing device, and therefore the base, comprises a screw head 725. The screw head is at the first end 601 of the purification device 700. It further comprises a thread 726 which extends circumferentially on a radial end of the base 705. The fixing device further comprises a groove 724 which houses an O-ring 727 which is a sealing member. The O-ring 727 may comprise for example an elastomer. The groove 724 extends circumferentially on a radial end of the base 705 relative to the vertical axis Z. The groove 724 is arranged between the thread 726 and the bundle 2.

[0183] The holding sleeve 742 is brazed with the first lower mouth 641 to fix it around the first lower orifice 636 of the first distribution chamber. The purification device 700 is introduced into the distribution chamber 15 through the first lower orifice 636 of the distribution chamber 15. The base 705 is then screwed so that the orifice of the container 606 is housed in the passage 20 of the first interface 619a and the purification device 700 is at least partly housed in the first distribution chamber. The seal between the bundle 2 and the purification device 700 is ensured by the O-ring 727 housed in the groove 724, the compression of which is ensured by positioning the base 705 in the holding sleeve 742.

[0184] In order to change the purification device 700 of the heat exchanger 1 of this seventh embodiment, it is sufficient to unscrew the base 705 using a tightening tool which can cooperate with the screw head 725. Once the purification device 700 has been extracted, the first distribution chamber is empty and ready to accommodate another purification device 700.

[0185] The heat exchanger 1 thus arranged is capable of operating according to the following example, taking the references of the first embodiment. This example is not limiting, it can be applied to the other embodiments described.

[0186] In addition, other operations can be considered. Among these operations, we will find the possibility of arranging the circuits so as to circulate the fluids in several passes.

[0187] Based on the first embodiment described, illustrated in the figures 1 à 4, the first fluid enters the heat exchanger 1 through the first interface 19a. The first fluid is then filtered by the purification device 100 when it enters the first distribution chamber 15. Then, the first fluid circulates in the first circulation path 6 towards the fourth interface 19d in a single pass. The circulation of the first fluid is disturbed by the disturbance devices 34. The first fluid is then discharged from the fourth interface 19d towards a loop thermally coupled to an electrical storage device.

[0188] The second fluid enters the heat exchanger 1 through the second interface 19b. The second fluid circulates in the second circulation path 7 via the second distribution chamber 17. The first fluid circulating in the first circulation path 6 then transfers its calories to the second fluid. This transfer of calories results in a cooling of the first fluid, which passes from the gaseous state to a two-phase gas-liquid state and then to a liquid state. The flow of the second fluid is disturbed by the disturbance devices 34 present in the second circulation path 7. The second fluid is subsequently evacuated from the heat exchanger 1 via the third interface 19c.

[0189] The various embodiments described can be implemented for an evacuation chamber. For example, in addition to the first distribution chamber 15, the first evacuation chamber 16 notably comprises a second purification device according to any one of the embodiments described above. This second purification device can comprise a filter in the form of a filtering surface and / or a compartment configured to house a desiccant in the event of a high probability that water could infiltrate into the loop. This may be the case in particular in hot countries with high humidity.

[0190] It is also possible to place a purification device according to one of the embodiments described previously in the second distribution chamber 17 and / or in the second evacuation chamber 18.

[0191] Of course, the invention is not limited to the examples which have just been described and numerous adjustments can be made to these examples without departing from the scope of the invention as defined in the appended claims.

Claims

1. A heat exchanger (1) for a motor vehicle, comprising a plurality of plates (3), the plates (3) being stacked one on top of the other in a stacking direction (E) to form a bundle (2) of plates (3), at least a first plate (3) and at least a second plate (3) define a first flow path (6) configured for a flow of a first fluid, at least the second plate (3) and at least a third plate (3) define a second flow path (7) configured for a flow of a second fluid. the bundle (2) of plates (3) comprising a first distribution chamber (IS) configured to supply a first fluid to the first circulation path (6), and a second distribution chamber (17) configured to supply a second fluid to the second circulation path (7), characterised in that the heat exchanger (1) comprises at least one purification device (100, 200, 300, 400, 500, 600, 700) housed in one of the distribution chambers (15, 17) and configured to remove water which has entered the heat exchanger and thus prevent the conduction of electricity.

2. The heat exchanger (1) according to the preceding claim, in which the heat exchanger (1) comprises an interface (19a, 19b) able to cooperate with an orifice (36, 37) of the distribution chamber (15, 17) housing the purification device (100, 200, 300, 400, 500, 600, 700) and with the purification device (100, 200, 300, 400, 500, 600, 700).

3. The heat exchanger (1) according to the preceding claim, in which the interface (19a, 19b) is integral with at least part of the purification device (100, 200, 300).

4. The heat exchanger (1) according to one of the preceding claims, in which the distribution chamber (15, 17) housing the purification device (100, 200, 300), 400, 500, 600, 700) comprises a first and a second end, the first end being open to external movement of the bundle (2) along the axis of rotation (E).

5. The heat exchanger (1) according to the previous claim, in which the bundle (2) has a mouth (40a, 40b) at one end, the mouth (40a, 40b) is configured to admit the fluid and to handle the purification device (100, 200, 300, 400, 500) with respect to the heat exchanger (1).

6. The heat exchanger (1) according to the preceding claim, in which the purification device (100, 200, 300, 400, 500) comprises a locking system to attach the purification device (100, 200, 300, 400, 500) to the interface (19a, 19b) and / or to the mouth (40a, 40b) of the bundle (2).

7. The heat exchanger (1) according to the preceding claim, in which the locking system is configured to attach the interface (19a, 19b) to the mouth (40a, 40b) of the bundle (2).

8. The heat exchanger (1) according to one of claims 4, in which the second end of the distribution chamber (13, 17) housing the purification device (600, 700) is open to an environment outside the bundle (2) along the stacking direction(E).

9. The heat exchanger (1) according to the preceding claim, in which the purification device (600, 700) comprises a plug (60) at an end opposite a fluid inlet opening (36, 37).

10. The heat exchanger (1) according to one of claims 8 to 9, wherein the bundle (2) has a first mouth (40a) at a first end, and a second mouth (641) at a second end, the first mouth (40a) is configured to admit fluid, and the second mouth (641) to manipulate the purification device (600, 700) relative to the heat exchanger (1).

11. The heat exchanger according to the preceding claim, wherein the purification device (600, 700) comprises a fixation device configured to attach the plug (605, 705) to the second mouth (641).

12. The heat exchanger (1) according to one of the preceding claims, wherein the purification device (100, 200, 300, 400, 500, 600, 700) is a first purification device arranged in the first distribution chamber (15) and wherein the bundle (2) of plates (3) comprises a first discharge chamber (16) configured to collect the first fluid having travelled the first circulation path (6), and the heat exchanger (1) comprises a second purification device arranged in the first discharge chamber (16).

13. System for cooling an electrical storage device for a vehicle, comprising a heat exchanger (1) according to any one of the preceding claims, a loop thermally coupled with the electrical storage device and in communication with the first flow path (6) of the heat exchanger (1), and a circuit in communication with the second flow path (7) of the heat exchanger (1).