Heat exchange device comprising a filtration means

Abstract

Title of the invention: Heat exchange device comprising a filtration means The present invention relates to a heat exchange device (1) for a motor vehicle comprising at least one first pass (2) configured to be traversed by a first fluid, at least one second pass (3) configured to be traversed by a second fluid distinct from the first fluid, the first pass (2) and the second pass (3) being arranged so as to carry out an exchange of calories, characterized in that the heat exchange device comprises at least one filtration means (25) arranged in one of the passes. Abstract figure: Figure 3

Description

Title of the invention: Heat exchange device comprising a filtration means

[0001] The present invention relates to the field of motor vehicles, and more particularly to the heat exchange devices equipping these vehicles.

[0002] Motor vehicles typically include a powertrain. This powertrain requires engine oil to provide adequate lubrication to its components. To achieve this, the engine oil must be maintained within an ideal temperature range to ensure not only effective lubrication, but also to prevent overheating that could damage the powertrain. Maintaining this ideal engine oil temperature can be achieved in several ways.

[0003] A first method involves the indirect dissipation of heat from the oil by the powertrain itself. The latter, being in contact with a coolant circulating in a cooling circuit of the powertrain, allows indirect thermal regulation of the oil. Thus, the excessive heat from the engine oil is transferred to the powertrain, which is then cooled by the cooling circuit.

[0004] This method nevertheless has the disadvantage of not being sufficiently effective in cooling the engine oil under extreme driving conditions or under heavy loads.

[0005] Another method is to use a heat exchange device dedicated to controlling the engine oil temperature in order to achieve better efficiency. These heat exchange devices come in several types.

[0006] Heat exchange devices can implement heat exchange with an air flow, they then use the outside air to cool the engine oil. For this, the heated engine oil circulates through a radiator placed at the front of the vehicle, thus the engine oil is cooled by the outside air which passes through this radiator.

[0007] The heat exchange devices can also implement a heat exchange with a coolant. In this case, the heat exchange device uses the properties of a cooling circuit of the motor vehicle. The engine oil is then cooled by a coolant contained in a cooling circuit passing through the heat exchange device.

[0008] Although effective in maintaining an ideal engine oil temperature, the implementation of heat exchange devices presents certain challenges in the vehicle design, particularly with regard to the positioning of these devices to minimize bulk.

[0009] In addition to maintaining an ideal engine oil temperature, it is also crucial to ensure that the engine oil is clean and filtered. Indeed, engine oil filtration in powertrains is essential to remove impurities, abrasive particles, and soot deposits, thus protecting the internal components of the powertrain.

[0010] Therefore, there is a need for a device that not only regulates the temperature of the engine oil, but also allows it to be filtered and cleaned, while being space-saving.

[0011] To address this problem, various solutions have been explored in the prior art. French patent FR2995650A1, for example, describes a strainer equipped with a heating element and a filtering element, the strainer being located in a casing containing hydraulic fluid.

[0012] This solution makes it possible to reduce the size caused by the addition of a heat exchange device, however it has the disadvantage of comprising only heating elements and not elements for heating and cooling, it is then more complicated to obtain an ideal temperature of the engine oil.

[0013] The objective of this invention is therefore to overcome the disadvantages of the prior art by presenting an alternative solution for controlling the temperature and filtering engine oil. For this, the present invention proposes a heat exchange device comprising a first and a second pass, allowing effective maintenance of the temperature of the engine oil while limiting the space allocated to the heat exchange device.

[0014] The main subject of the present invention is thus a heat exchange device for a motor vehicle comprising at least one first pass configured to be traversed by a first fluid, at least one second pass configured to be traversed by a second fluid distinct from the first fluid, the first pass and the second pass being arranged so as to carry out an exchange of calories, characterized in that the heat exchange device comprises at least one filtration means arranged in one of the passes.

[0015] The first fluid of the heat exchange device may be in liquid, gaseous form, or even a combination of both. Its primary function is to transmit its heat to the second fluid or to absorb the heat from the latter. This first fluid may, for example, be a fluid capable of carrying out an exchange of calories in order to cool and / or heat the second fluid indirectly. The first fluid may be of the heat transfer fluid type, such as glycolated water for example.

[0016] The second fluid of the heat exchange device is generally a liquid and can be, among other things, engine oil. Any type of engine oil can be used, for example, mineral, semi-synthetic or synthetic engine oils.

[0017] The filtration means is usually positioned in the second pass. Any type of material can be used to form the filtration means, provided that these materials are effective in filtering fine particles. These characteristics are indeed crucial in order to retain the particles present in the second fluid while allowing its passage and avoiding obstruction of the filtration means. The filtration means can for example be made from composite materials, synthetic fibers, steel wool, or a combination of cellulose and glass fibers.

[0018] According to an optional characteristic of the invention, the first pass comprises at least one inlet and at least one outlet of the first fluid, the second pass comprising at least one inlet and at least one outlet of the second fluid, at least one inlet pipe being connected to the inlet or to one of the inlets of the second pass, said inlet pipe extending through the first pass.

[0019] The first fluid enters the first pass through the inlet and exits via the outlet. The second fluid enters the second pass through the inlet and exits through the outlet. Thus, the first fluid circulates in the first pass from the inlet to the outlet, while the second fluid circulates in the second pass from the inlet to the outlet. This circulation within the first pass and the second pass allows a heat exchange between the first fluid and the second fluid. After this heat exchange, the fluids are therefore evacuated from the heat exchange device with an altered temperature.

[0020] The inlet tubing extending through the first pass is designed to bring the fluid to the inlet of the second pass. It should be understood that the expression "extending through the first pass" means that the inlet tubing extends from the inlet of the second pass so as to pass through a bottom wall and an top wall of the first pass by passing through the interior of the first pass. There is thus a first pass which is crossed from one side to the other by the inlet tubing.

[0021] This arrangement of the inlet pipe essentially allows a saving of space compared to an inlet pipe which would be arranged otherwise, this then results in a compact heat exchange device. The placement of the inlet pipe also makes it possible to increase the heat exchange contact surface between the first and the second fluid. Indeed, the first fluid circulating in the first pass can exchange calories with the second fluid which is in the inlet pipe.

[0022] According to an optional characteristic of the invention, the heat exchange device for a motor vehicle comprises at least one outlet pipe connected to the outlet or one of the outlets of the second pass, the outlet tubing extending parallel to the inlet tubing.

[0023] The parallel arrangement of the outlet pipe thus gives the heat exchange device a shape that minimizes the size and space occupied.

[0024] It is interesting to point out that the outlet pipe extends in a straight line. This characteristic also applies to the inlet pipe(s), which also extend in a straight line.

[0025] According to an optional characteristic of the invention, the heat exchange device for a motor vehicle comprises two inlet pipes for the second fluid connected to two inlets of the second pass, at least one of the inlet pipes surrounding the outlet pipe.

[0026] It should be understood that the expression "surrounding the outlet tubing" means that the inlet and outlet tubings are arranged coaxially, thus sharing a common axis. This axis passes through the center of both the inlet tubing and the outlet tubing. As a result, the outlet tubing is located inside the inlet tubing. This configuration has the advantage of minimizing the space occupied by the device, thus allowing for a compact and space-saving heat exchange device.

[0027] According to an optional characteristic of the invention, the second pass comprises an upper face comprising at least two longitudinal ends, at least one of the inlets and / or outlets being arranged at one of the ends.

[0028] Advantageously, at least one of the inlets is located at one longitudinal end of the device, while the outlet is located at the opposite longitudinal end. This arrangement allows the second fluid to flow from one longitudinal end to the other, thus providing sufficient time for efficient heat exchange of the second fluid with the first fluid.

[0029] According to an optional characteristic of the invention, the second pass comprises a lower face comprising at least one protrusion projecting into the second pass, the protrusion extending parallel to a direction of flow of the second fluid between the inlet and the outlet of the second pass.

[0030] The protrusion(s) projecting from the lower face may project without reaching the upper face of the first pass, or on the contrary may project until they are in contact with the upper face. The protrusion(s) make it possible to guide the flow of the second fluid in the second pass, following the flow direction of the second fluid. This flow direction extends more precisely from the inlet located on one of the longitudinal ends to the outlet located at the opposite longitudinal end.

[0031] According to an optional characteristic of the invention, the first pass comprises a lower wall and an upper wall, said lower wall and upper wall being delimited and connected to each other by at least two opposing partitions, the inlet of the first pass being arranged on one of the partitions while the outlet of the first pass is arranged on the opposite partition.

[0032] This configuration allows for prolonged circulation of the first fluid in the first pass. This additional time spent in the first pass allows for more efficient heat exchange with the second fluid.

[0033] According to an optional feature of the invention, the upper wall of the second pass can be made in one piece with the lower face of the first pass. It is understood here that the lower face of the first pass and the upper wall of the second pass are monobloc, the separation of these components resulting in the destruction of one and / or the other of these components. This thus means that the lower face and the upper wall form a single wall serving to facilitate heat exchange. This monobloc nature offers an economic advantage by reducing material and manufacturing costs.

[0034] According to an alternative characteristic of the invention, the upper wall of the second pass and the lower face of the first pass are produced independently and intended to be assembled together. In this alternative, the upper wall and the lower face are thus mounted together and are in contact so as to allow heat exchange between the first fluid of the first pass and the second fluid of the second pass. Thus, a certain flexibility concerning the choice of materials for the lower face and the upper wall is possible. These two elements can therefore benefit from the advantages specific to each material used.

[0035] According to an optional characteristic of the invention, the first pass comprises at least one traffic chicane.

[0036] The circulation baffle(s) are ribs positioned in intersecting planes relative to a circulation direction, the circulation direction corresponding to a direction extending from the inlet to the outlet of the first pass. The circulation baffle(s) may for example be positioned in planes perpendicular to this circulation direction and are in contact with a lower wall and an upper wall of the first pass. Furthermore, the circulation baffle(s) extend from a partition of the first pass without joining the opposite partition, thus allowing the first fluid to circulate. When there are several baffles, they are installed alternately on each partition, thus forming an "S"-shaped conduit. This arrangement extends the path of the first fluid within the first pass, which improves the efficiency of the heat exchange with the second fluid.

[0037] According to an optional characteristic of the invention, at least one of the inlet pipes houses a filtration device complementary to the filtration means.

[0038] This filtration device enhances the efficiency of the filtration of the second fluid. The material used may be similar to that of the existing filtration means. The filtration device may be a tubular filter designed to adapt to the shape of one or more inlet pipes.

[0039] It should be understood that the presence of an additional filtration device implies that at least one filtration means is always present, and that it is possible to add an additional filtration device. This additional filtration device can be installed in one of the inlets, or a filtration device can be placed in each of the inlets.

[0040] According to another aspect of the invention, a powertrain comprises a heat exchange device as described in the present document and a casing, said heat exchange device being secured to the casing by at least one fixing means.

[0041] In this configuration, we have a powertrain equipped with a heat exchange device which ensures both filtration and regulation of the temperature of the second fluid. The advantage of this heat exchange device is that it does not increase the size of the powertrain, thus making it possible to maintain a compact powertrain.

[0042] According to an optional characteristic of the invention, the fixing means is positioned on the inlet pipe(s) and / or on the outlet pipe(s) of the heat exchange device. In this arrangement, the upper face of the first pass of the heat exchange device is positioned facing the casing of the powertrain, thus minimizing the size of the heat exchange device.

[0043] According to an optional feature of the invention, the casing comprises at least one opening, the inlet and / or outlet pipe(s) of the heat exchange device being connected to the opening(s) in order to carry out an exchange of second fluid between the casing and the second pass. Advantageously, at least one opening is dedicated to the distribution of the second fluid from the casing to the inlet pipe of the heat exchange device, and at least one other opening is designed for the recovery of the second fluid coming from the outlet pipe.

[0044] According to an optional characteristic of the invention, the exchange of the second fluid between the opening(s) of the casing and the inlet pipe(s) is carried out by gravity.

[0045] This approach allows to reduce the energy consumption by simply exploiting the force of gravity. This implies that the heat exchange device must be positioned under the casing, so that gravity can act on the second fluid and cause it to flow into the inlet pipe.

[0046] According to an optional characteristic of the invention, the exchange of the second fluid between the opening(s) of the casing and the outlet pipe(s) is done by vacuum.

[0047] Since the heat exchange device is installed below the casing, it is necessary to have a means for raising the second fluid from this device. This raising is carried out by vacuum, thanks to a pump designed to bring the second fluid to the casing.

[0048] According to another aspect of the invention, a heat treatment system for an electric powertrain of a motor vehicle comprises a heat exchange device for a motor vehicle as described in the present document and a heat transfer fluid circuit configured to deliver a cold or hot liquid, the heat treatment system comprising a switching means for delivering either the cold liquid or the hot liquid to the heat exchange device.

[0049] The heat treatment system therefore comprises a heat transfer fluid circuit designed to provide either a cold or hot liquid, which is poured into the first pass and therefore corresponds to the first fluid according to the invention. This liquid may in particular be cold or hot glycolated water. As a result, the device can either heat or cool the second fluid in the second pass using this first fluid. This configuration thus makes it possible to achieve an optimal temperature of the second fluid. A switching mechanism is integrated into the heat treatment system to deliver either the cold liquid or the hot liquid to the heat exchange device, thus facilitating the regulation of the temperature of the second fluid.

[0050] Other characteristics, details and advantages of the invention will emerge more clearly on reading the description which follows on the one hand, and examples of embodiment given for informational and non-limiting purposes with reference to the appended drawings on the other hand, in which:

[0051] Other characteristics, details and advantages of the invention will emerge more clearly on reading the description which follows on the one hand, and examples of embodiment given for informational and non-limiting purposes with reference to the appended drawings on the other hand, in which:

[0052] [Fig-1] illustrates, in perspective, a heat exchange device according to a mode of realization of the invention.

[0053] [Fig.2] is a diagonal section of the heat exchange device according to the method of realization of [Fig.l] according to a section plane AA shown in [Fig.l].

[0054] [Fig.3] is a section of the heat exchange device according to the embodiment of figures 1 and 2, said device being in contact with a casing also visible on the figure.

[0055] [Fig.4] is a second pass of the heat exchange device in which a The upper face of the second pass was removed so that the interior of the second pass could be observed.

[0056] [Fig.5] is a first pass of the heat exchange device in which a The upper wall of the first pass was removed so that the interior of the first pass could be observed.

[0057] The features and variants of the invention may be combined with each other, in various combinations, provided that they are not incompatible or mutually exclusive. In particular, variants of the invention may be imagined comprising only a selection of features described below in isolation from the other features described, if this selection of features is sufficient to confer a technical advantage and / or to differentiate the invention from the prior art.

[0058] In the figures, the elements common to several figures retain the same reference.

[0059] In the detailed description which follows, the terms "longitudinal" and "transverse" define the orientation of the various components of the rearview mirror base for a motor vehicle. The term "longitudinal" corresponds to the length of the heat exchange device, while the term "transverse" refers to the width of the heat exchange device.

[0060] [Fig.l] illustrates in perspective a heat exchange device 1 for a motor vehicle according to an embodiment of the invention. This representation provides an overall view of the heat exchange device 1.

[0061] The heat exchange device 1 comprises a first pass 2 and a second pass 3, the first pass 2 being intended to be traversed by a first fluid and the second pass 3 being intended to be traversed by a second fluid.

[0062] The first pass 2 is provided with an upper wall 4 and comprises four partitions 5. The partitions 5 are arranged at longitudinal and transverse ends of the upper wall 4. Each of the partitions 5 is arranged facing another partition 5 so as to form a parallelogram, thus the two partitions 5 positioned at the transverse ends of the upper wall 4 are arranged facing each other and the two partitions 5 positioned at the longitudinal ends are also arranged facing each other. One of the partitions 5 positioned at the longitudinal ends comprises an inlet 6, while the other partition 5 arranged at the opposite longitudinal end comprises an outlet 7.

[0063] The inlet 6 and the outlet 7 both have a tubular shape and are therefore hollow so as to allow the circulation of the first fluid. The first fluid can be in a liquid, gaseous state, or a combination of both. This first fluid can be, for example, a refrigerant or any other type of fluid capable of carrying out heat transfer.

[0064] The first pass 2 is delimited by four corners, each corner connecting two adjacent partitions 5. Three of these corners have a rounded shape, while the remaining corner forms a fillet 9.

[0065] The second pass 3 is not very visible in this figure and will be better described in [Fig.2]. It is nevertheless possible to observe inlet pipes 10 and an outlet pipe 11. In this embodiment, the heat exchange device 1 comprises two inlet pipes 10, of course, it is entirely possible in other embodiments to have a heat exchange device 1 comprising more or less than two inlet pipes 10.

[0066] The inlet pipes 10 and the outlet pipe 11 are connected to the second pass 3 by one of their ends, although this is not visible in this figure.

[0067] One of the two inlet pipes 10 extends through the first pass 2, while the other inlet pipe 10 is arranged in a space formed by the fillet 9 and extends parallel to the inlet pipe 10 passing through the first pass 2. It is interesting to note that the two inlet pipes 10 extend in a rectilinear manner.

[0068] The ends of the inlet pipes 10 opposite those connected to the second pass 3 comprise fixing means 12. These fixing means 12 are in this embodiment fixing flanges, other types of fixing means 12 can however be used. Each of the two inlet pipes 10 thus comprises a fixing means 12. The fixing means 12 present on the inlet pipe 10 passing through the first pass 2 comprises four orifices 13 intended to receive fixing elements, for example screws. The fixing means 12 present on the pipe 10 arranged in the space formed by the fillet 9 comprises three orifices 13 also intended to receive fixing elements.

[0069] In a similar manner to one of the inlet pipes 10, the outlet pipe 11 is arranged in the space formed by the fillet 9. More precisely, the inlet pipe 10 arranged in the space formed by the fillet 9 surrounds the outlet pipe 11. This inlet pipe 10 and the outlet pipe 11 are coaxial. The outlet pipe 11 thus extends parallel to the two inlet pipes 10 and extends in a rectilinear manner.

[0070] [Fig.2] is a diagonal section of the heat exchange device 1 according to the embodiment of [Fig.l] along a section plane AA shown in [Fig.l]. This figure allows a better understanding of how the first pass 2 and the second pass 3 are arranged relative to each other.

[0071] The first pass 2 comprises, in addition to the upper wall 4, a lower wall 14. The upper wall 4 and the lower wall 14 are delimited and connected to each other by the partitions 5 extending from the lower wall 14 to the upper wall 4, thus forming an internal space of the first pass 2. The first pass 2 also comprises circulation baffles 15 extending from the lower wall 14 to the upper wall 4 within the internal space of the first pass 2.

[0072] The second pass 3 comprises an upper face 16 and a lower face 17. These two faces are connected to each other by panels 18 connecting two longitudinal ends and two transverse ends of the lower 15 and upper 16 faces.

[0073] In this embodiment, the panels 18 are formed by assembling panel parts 18. The first panel part 18 is connected to the ends of the upper face 16, while the second panel part 18 is connected to the ends of the lower face 17, so that the panels 18 are assembled by associating the first panel part 18 with the second panel part 18, which has the effect of forming the second pass 3. However, other embodiments are possible in which the panels 18, and therefore the second pass 3, are made in one piece.

[0074] As mentioned previously in the description of [Fig. 1], the second pass 3 is connected to inlet pipes 10 and to an outlet pipe 11, one of the inlet pipes 10 extending through the first pass 2. More precisely, this inlet pipe 10 extends from the second pass 3 so as to pass through the lower wall 14 and the upper wall 4 of the first pass 2 by passing through the interior of the first pass 2.

[0075] The inlet pipes 10 are connected by one of their ends to the second pass 3 by inlets 19, while the outlet pipe 11 is connected to the second pass 3 by an outlet 20. In this embodiment, the second pass 3 has two inlets 19 and one outlet 20 in order to correspond to the number of inlet pipes 10 and outlet pipes 11.

[0076] The inlets 19 and the outlet 20 are positioned on the upper face 16 of the second pass 3. More precisely, one of the inlets 19 is located at one of the longitudinal ends of the upper face 16, while the other inlet 19 and the outlet 20 are located on the other longitudinal end of the upper face 16.

[0077] The inlets 19 and the outlet 20, being connected to the inlet pipes 10 and the outlet pipe 11, thus share certain characteristics. In a similar manner to the outlet pipe 11, the outlet 20 is therefore surrounded by one of the inlets 19. It is also coaxial with this inlet 19 around an axis passing through their center.

[0078] The second pass 3 also comprises protrusions 21 projecting from the lower face 17 in the second pass 3. These protrusions 21 project from the face lower face 17, towards the upper face 16 without coming into contact with it. It is nevertheless possible in other embodiments for the protrusions 21 to be in contact with the upper face 16.

[0079] A filtration means 25 is arranged in the second pass 3 and will be detailed more precisely in the description of [Fig.3]

[0080] [Fig. 3] is a section of the heat exchange device 1 according to the embodiment of FIGS. 1 and 2 and of a part of a casing 22 of a powertrain 23.

[0081] This figure facilitates understanding of the interaction between the casing 22 of a powertrain 23 and the heat exchange device 1. Although the casing 22 is not shown in its entirety, it is identifiable as belonging to a powertrain 23 of a motor vehicle.

[0082] The casing 22 has openings 24 to which the inlet pipes 10 and the outlet pipe 11 of the heat exchange device 1 are connected. A first opening 24 is connected to the inlet pipe 10 passing through the first pass 2, a second opening 24 is connected to the other inlet pipe 10, and a third opening 24 is connected to the outlet pipe 11.

[0083] As specified in the description of [Fig.l], the inlet pipes 10 and the outlet pipe 11 are equipped, on one of their ends, with fixing means 12. These fixing means 12 have the main function of allowing the assembly of the heat exchange device 1 to the casing 22 of the powertrain 23, making the latter an integral part of the powertrain 23.

[0084] The heat exchange device 1 allows the exchange of the second fluid with the casing 22. The second fluid is generally engine oil, although other types of fluids can be used as the second fluid. The engine oil can in particular be a mineral, semi-synthetic or synthetic oil.

[0085] The second fluid flows from the openings 24 connected to the inlet pipes 10, enters the second pass 3 via the inlet pipes 10 and the inlets 19, circulates in the second pass 3, then leaves the second pass 3 via the outlet 20 and the outlet pipe 11 in order to reach the opening 24 connected to the outlet pipe 11. The fluid enters the inlet pipes 10 by gravity, while it is sucked out of the outlet pipes 11 by vacuum.

[0086] The heat exchange device 1 comprises a filtration means 25 arranged in one of the two passes. More precisely, the filtration means 25 is arranged in the second pass 3. This filtration means 25 serves to purify the second fluid circulating in this second pass 3 and coming from the casing 22.

[0087] The filtration means 25 may be composed of any type of material. However, these materials must have good filtration properties, that is to say they must be able to capture fine particles, while effectively resisting clogging. This is essential in order to prevent clogging of the filter, while ensuring the passage of the second fluid through the filtration means 25.

[0088] The filtration means 25 may for example be composed of composite materials, synthetic fibers, or a mixture of cellulose and glass fibers arranged in several layers and forming a dense network. This network then makes it possible to capture particles of different sizes while allowing the second fluid to circulate through.

[0089] The presence of the filtration means 25 is essential. Indeed, the heat exchange device 1 equipped with the filtration means 25 serves not only to maintain the ideal temperature of the second fluid, but also to clean it, thus avoiding contamination of the powertrain 23 and obstruction of its components. The heat exchange device 1 therefore plays a dual role, by regulating the temperature and eliminating impurities from the second fluid.

[0090] The heat exchange device 1 may also include one or more additional filtration devices aimed at improving the efficiency of the filtration of the second fluid. These filtration devices are nevertheless not shown in the figures since they are not present in this embodiment.

[0091] The invention can therefore be limited solely to the use of the single filtration means 25 as is the case in this embodiment. The filtration means 25 can also be associated with a filtration device in one of the inlet pipes 10. It is also possible to associate the filtration means 25 with several filtration devices, each of these filtration devices being arranged in each of the inlet pipes 10.

[0092] Similarly to the filtration means 25, the filtration device(s) may be designed from any type of material provided that they have good filtration and anti-clogging properties. When these filtration devices are arranged in the inlet pipes 10, they may have the form of a tubular filter in order to correspond to the inlet pipes 10.

[0093] [Fig.4] is the second pass 3 of the heat exchange device 1 in which the upper face 16 of the second pass 3 has been removed so as to be able to observe the interior of the second pass 3. The filtration means 25 is not shown here.

[0094] [Fig. 4] reveals the lower face 17 of the second pass 3, as well as the protrusions 21 projecting from this lower face 17. These protrusions 21 extend parallel to a flow direction of the second fluid. The flow direction, marked by the reference E in the figures, extends from one of the inlets 19 to the outlet 20, more precisely from one of the inlets 19 located at one longitudinal end to the outlet 20 at the opposite longitudinal end. As [Fig. 4] illustrates neither the inlets 19 nor the outlet 20, because the upper face 16 is not shown, we can simplify by saying that the flow direction extends from one longitudinal end to the other of the second pass 3. This flow direction indicates the path taken by the second fluid through the second pass.

[0095] In this embodiment, the protrusions 21 extend along the flow direction in a discontinuous manner. However, it is also conceivable that in other embodiments, the protrusions 21 extend uninterruptedly.

[0096] The second pass 3 is delimited by four corners, three of which are rounded. The unrounded corner forms a protrusion 27. Although this is not visible in [Fig. 4] since it does not show the upper face 16, one of the inlets 19 with its associated inlet pipe 10, as well as the outlet 20 and its associated outlet pipe 11, are located at the level of the protrusion 27 on this upper face 16. This protrusion 27 thus allows the positioning of the inlet 19, the outlet 20, the inlet pipe 10 and the outlet pipe 11 in the space created by the fillet 9.

[0097] [Fig.5] schematically illustrates the first pass 2 in which the upper wall 4 has been removed in order to visualize the interior of the first pass 2.

[0098] In this first pass 2, we find the lower wall 14 comprising the circulation baffles 15 in contact with the lower wall 14 and the upper wall 4.

[0099] The circulation baffles 15 are ribs positioned in intersecting planes with respect to a circulation direction denoted C in [Fig. 5], the circulation direction corresponding to a direction extending from the inlet 6 to the outlet 7 of the first pass 2. In this embodiment, the circulation baffles 15 are positioned perpendicular to the circulation direction C, although other inclinations with respect to the circulation direction C are conceivable. The circulation baffles 15 thus extend from a partition 5 perpendicular to the circulation direction C without joining the opposite partition 5, thus allowing the first fluid to circulate from the inlet 6 to the outlet 7.

[0100] The circulation baffles 15 are arranged in an alternating manner: each circulation baffle 15 begins at the partition 5 opposite the previous one, thus forming an S-shaped conduit. This arrangement allows the first fluid to spend more time in the first pass 2, promoting a greater heat exchange with the second fluid of the second pass 3.

[0101] Furthermore, [Fig.5] also illustrates the arrangement of the inlet pipe 10 passing through the fillet 9 and the outlet pipe 11. As mentioned previously, the inlet pipe 10 surrounds the outlet pipe 11. The inlet pipe 10 is further provided with two arms 26 connecting and holding the outlet pipe 11, thus ensuring its stability within the heat exchange device 1.

[0102] The heat exchange device as presented in this document may also be part of a heat treatment system for a powertrain. In this case, the system comprises a heat transfer fluid circuit configured to supply either a hot or cold liquid. This liquid corresponds to the first fluid of the first pass and has the function of heating or cooling the second fluid. To deliver the hot or cold liquid, the heat treatment system also comprises a switching means which makes it possible to select the hot or cold liquid according to the temperature requirements of the second fluid.

[0103] The present invention thus provides a heat exchange device comprising a first pass and a second pass, one of the passes comprising a filtration means. Said device being designed to form part of a powertrain and to serve in a heat treatment system for this powertrain. Such a heat exchange device then allows temperature regulation as well as filtration of the second fluid.

[0104] The present invention cannot, however, be limited to the means and configurations described and illustrated here and it also extends to any equivalent means and configuration as well as to any technically operative combination of such means.

Claims

Claims

1. Heat exchange device (1) for a motor vehicle comprising at least one first pass (2) configured to be traversed by a first fluid, at least one second pass (3) configured to be traversed by a second fluid distinct from the first fluid, the first pass (2) and the second pass (3) being arranged so as to carry out an exchange of calories, characterized in that the heat exchange device comprises at least one filtration means (25) arranged in one of the passes.

2. Heat exchange device (1) for a motor vehicle according to claim 1, wherein the first pass (2) comprises at least one inlet (6) and at least one outlet (7) of the first fluid, the second pass (3) comprising at least one inlet (19) and at least one outlet (20) of the second fluid, at least one inlet pipe (10) being connected to the inlet (19) or to one of the inlets (19) of the second pass (3), said inlet pipe (10) extending through the first pass (2).

3. Heat exchange device (1) for a motor vehicle according to claim 2, comprising at least one outlet pipe (11) connected to the outlet (20) or to one of the outlets (20) of the second pass (3), the outlet pipe (11) extending parallel to the inlet pipe (10).

4. Heat exchange device (1) for a motor vehicle according to claim 3, comprising two inlet pipes (10) for the second fluid connected to two inlets (19) of the second pass (3), at least one of the inlet pipes (10) surrounding the outlet pipe (11).

5. Heat exchange device (1) for a motor vehicle according to any one of claims 2 to 4, in which the second pass (3) comprises an upper face (16) comprising at least two longitudinal ends, at least one of the inlets (19) and / or outlets (20) being arranged at one of the ends.

6. Heat exchange device (1) for a motor vehicle according to any one of claims 2 to 5, in which the first pass (2) comprises a lower wall (14) and an upper wall (4), said lower wall (14) and upper wall (4) being delimited and connected to each other by at least two opposite partitions (5), the inlet (6) of the first pass (2) being arranged on one of the partitions (5) while the discharge (7) of the first pass (2) is arranged on the opposite partition (5).

7. Heat exchange device (1) for a motor vehicle according to any one of claims 1 to 6 in combination with claim 2, in which at least one of the inlet pipes (10) houses a filtration device complementary to the filtration means (25).

8. Powertrain (23) comprising a heat exchange device (1) according to any one of claims 1 to 7 and a casing (22), said heat exchange device being secured to the casing (22) by at least one fixing means (12).

9. Powertrain (23) according to claim 8 in combination with claim 3, wherein the fixing means (12) is positioned on the inlet pipe(s) (10) and / or on the outlet pipe(s) (11) of the heat exchange device (1).

10. A heat treatment system for an electric powertrain of a motor vehicle, comprising a heat exchange device (1) for a motor vehicle according to any one of claims 1 to 7 and a heat transfer fluid circuit configured to deliver a cold or hot liquid, the heat treatment system comprising a switching means for delivering either the cold liquid or the hot liquid to the heat exchange device (1).

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