WO2024052488A1

WO2024052488A1 - Collecting box for a cooling module of an electric or hybrid motor vehicle, having a tangential-flow turbomachine

Info

Publication number: WO2024052488A1
Application number: PCT/EP2023/074635
Authority: WO
Inventors: Amrid MAMMERI; Kamel Azzouz
Original assignee: Valeo Systemes Thermiques
Priority date: 2022-09-08
Filing date: 2023-09-07
Publication date: 2024-03-14
Also published as: FR3139505A1

Abstract

Collecting box (41) for a cooling module (22) of an electric or hybrid motor vehicle (10), the collecting box (41) being intended to be traversed by an air flow (F), the collecting box (41) comprising a tangential-flow turbomachine (30) configured to generate the air flow (F), the collecting box (41) further comprising: - at least one side wall (411, 412, 413) forming a duct in which the air flow (F) is intended to circulate, -a volute (44) configured to guide the air flow (F) towards the air outlet (22b) and within which the tangential-flow turbomachine (30) is arranged, and - a guide wall (46) for guiding the air flow (F) towards the air outlet (22b), the guide wall (46) and/or the at least one side wall (411, 412, 413) comprising at least one opening (O1, O2, O3, O4) as well as at least one closure flap (460, 470, 480, 490, 490') mounted pivotably between an open position and a closed position of the opening (O1, O2, O3, O4), the collecting box (41) comprising at least one stop (60) configured to limit the opening angle of the at least one closure flap (460, 470, 480, 490, 490') in the open position.

Description

COLLECTOR BOX FOR COOLING MODULE OF AN ELECTRIC OR HYBRID MOTOR VEHICLE WITH TANGENTIAL TURBOMACHINE

[0001] The invention relates to a cooling module for an electric or hybrid automobile vehicle, with a tangential turbomachine, and more particularly to a collector housing of such a cooling module.

[0002] A cooling module (or heat exchange module) of a motor vehicle conventionally comprises at least one heat exchanger and a ventilation device adapted to generate an air flow in contact with the at least one heat exchanger. heat. This ventilation device is for example in the form of a tangential turbomachine arranged within a volute of a collector housing of the cooling module. This tangential turbomachine makes it possible in particular to generate an air flow in contact with the heat exchanger(s), in particular when the vehicle is stationary or when it is moving at low speed.

[0003] When driving, a high speed of the vehicle can be sufficient to create the air flow without assistance from the tangential turbomachine. However, the shape of the volute can obstruct the flow of air passing through the cooling module and more particularly the collector box, thus greatly increasing the pressure losses, which can harm the proper functioning of the heat exchangers and potentially degrade the aerodynamics. of the motor vehicle. In order to remedy this drawback, the cooling module may comprise, in addition to the air outlet of the tangential turbomachine, at least one other opening located at a rear face of the cooling module, this rear face being juxtaposed at the air outlet of the tangential turbomachine. Thus, when the vehicle is rolling and has reached a sufficient speed of movement, this or these openings allow the air flow to pass and to bypass (the English “by-pass”) the tangential turbomachine.

[0004] The cooling module may also include at least one closing device making it possible to block the additional opening(s). This shutter device may in particular have one or more flaps configured to pivot between a so-called open position and a so-called closed position, which makes it possible to regulate the flow of air evacuated through the additional opening(s) if necessary.

[0005] However, the space available within the motor vehicle for the arrangement of the cooling module is relatively limited. Thus, the equipment arranged around the cooling module, such as the electric motor of the electric or hybrid vehicle, can form a potential obstacle to the air flow and/or to the shutters of the shutter device, particularly in the case where the or the additional openings and the shutter device(s) associated therewith are arranged on the rear face of the collector housing. It is therefore appropriate to optimize the location of this or these air flow evacuation openings by depending on the arrangement planned for potential obstacles and the space available around the collector box while favoring a compact design thereof.

[0006] The aim of the present invention is therefore to at least partially remedy the drawbacks of the prior art and to propose an improved collector box making it possible to evacuate the air flow while driving while optimizing the available space.

[0007] The present invention therefore relates to a collector box for a cooling module of an electric or hybrid motor vehicle, said collector box being intended to be crossed by an air flow, said collector box a tangential turbomachine configured to generate the air flow, the collector box further comprising:

- at least one side wall forming a conduit in which the air flow is intended to circulate,

- a volute configured to guide the air flow towards the air outlet and within which the tangential turbomachine is arranged, and

- a wall for guiding the air flow towards the air outlet, the guide wall and/or the at least one side wall comprising at least one opening as well as at least one shutter flap pivotally mounted between a opening position and a closing position of said opening, the collector box comprising at least one stop configured to limit the opening angle of the at least one shutter flap in the open position.

[0008] According to one aspect of the invention, the at least one stop is arranged on the at least one shutter flap.

[0009] According to another aspect of the invention, the at least one stop is integral with the at least one shutter flap.

[0010] According to another aspect of the invention, the at least one stop is a part fixed to the at least one shutter flap.

[0011] According to another aspect of the invention, the at least one stop is arranged on the at least one side wall and/or guide wall of the collector housing.

[0012] According to another aspect of the invention, the at least one stop is integral with the at least one side wall and/or guide wall of the collector housing.

[0013] According to another aspect of the invention, the at least one stop is a part fixed to the at least one side wall and/or guide wall of the collector housing.

[0014] According to another aspect of the invention, the guide wall and/or the at least one side wall and/or guide wall comprise a plurality of shutter flaps and the stops are configured so that the different flaps shutters have opening angles specific to each shutter shutter.

[0015] According to another aspect of the invention, the collector housing comprises a lower side wall comprising at least one opening and at least one shutter flap, the at least one stop is configured so that the opening angle said at least one shutter flap is less than or equal to 7°. [0016] The present invention also relates to a cooling module for an electric or hybrid motor vehicle, said cooling module being intended to be traversed by an air flow and comprising:

- a fairing forming an internal conduit in a longitudinal direction of the cooling module inside which is arranged at least one heat exchanger intended to be crossed by the air flow, and

- a collector box as described above, said collector box being arranged downstream of the fairing in the longitudinal direction.

Other characteristics and advantages of the present invention will appear more clearly on reading the following description, provided by way of illustration and not limitation, and the appended drawings in which:

[0018] [Fig 1] Figure 1 shows a schematic representation of the front of a motor vehicle in side view,

[0019] [Fig 2] Figure 2 shows a schematic representation in perspective and partial section of the front of a motor vehicle and of a cooling module according to a first embodiment,

[0020] [Fig 3] Figure 3 shows a schematic perspective representation of the internal face of a collector housing of a cooling module,

[0021] [Fig 4] Figure 4 shows a schematic perspective representation of the rear face of a collector box of Figure 3 according to a first embodiment and according to a closed position of the shutters,

[0022] [Fig 5] Figure 5 shows a schematic perspective representation of the rear face of a collector box of Figure 3 according to a first embodiment and according to an opening position of the shutters,

[0023] [Fig 6] Figure 6 shows a schematic sectional representation of the collector box of Figure 4 according to the closing position of the flaps,

[0024] [Fig 7] Figure 7 shows a schematic sectional representation of the collector box of Figure 5 according to the opening position of the shutters,

[0025] [Fig 8] Figure 8 shows a schematic sectional representation of the rear face of a collector box according to a second embodiment and according to a closed position of the shutters,

[0026] [Fig 9] Figure 9 shows a schematic sectional representation of the rear face of a collector box according to a second embodiment and according to an opening position of the shutters,

[0027] [Fig 10] Figure 10 shows a schematic perspective representation of the lower part of the rear face of a collector box in a closed position of the shutters, [0028] [Fig 11] Figure 11 shows a representation schematic perspective of the lower part of the rear face of a collector box according to an opening position of the shutters.

[0029] In the different figures, identical elements bear the same reference numbers. The following achievements are examples. Although the description refers to one or more embodiments, this does not necessarily mean that each reference relates to the same embodiment, or that the features only apply to a single embodiment. Simple features of different embodiments may also be combined and/or interchanged to provide other embodiments.

[0031] In the present description, certain elements or parameters can be indexed, such as for example first element or second element as well as first parameter and second parameter or even first criterion and second criterion, etc. In this case, it is a simple indexing to differentiate and name elements or parameters or criteria that are close, but not identical. This indexing does not imply a priority of one element, parameter or criterion in relation to another and such denominations can easily be interchanged without departing from the scope of this description. This indexing does not imply an order in time either, for example to assess this or that criterion.

[0032] In the present description, “upstream” means that one element is placed before another with respect to the direction of circulation of an air flow. Conversely, “downstream” means that one element is placed after another in relation to the direction of circulation of a flow or fluid.

[0033] In Figures 1 to 9, an XYZ trihedron is shown in order to define the orientation of the different elements from each other. A first direction, denoted X, corresponds to a longitudinal direction of the vehicle. It also corresponds to the inverse of the direction of travel of the vehicle. A second direction, denoted Y, is a lateral or transverse direction. Finally, a third direction, denoted Z, is vertical. The directions, X, Y, Z are orthogonal two by two.

[0034] In Figures 1 and 2, the cooling module according to the present invention is illustrated in a functional position, that is to say when it is arranged within a motor vehicle.

[0035] Figure 1 schematically illustrates the front part of an electric or hybrid motor vehicle 10 which may include an electric motor 12. The vehicle 10 comprises in particular a bodywork 14 and a bumper 16 carried by a chassis (not shown ) of the motor vehicle 10. The bodywork 14 defines a cooling bay 18, that is to say an opening through the bodywork 14. The cooling bay 18 is unique here. This cooling bay 18 is preferably located in the lower part of the front face 14a of the bodywork 14. In the example illustrated, the cooling bay 18 is located under the bumper 16. A grille 20 can be placed in the cooling bay 18 to prevent projectiles from passing through the cooling bay 18. A cooling module 22 is arranged opposite the cooling bay 18. The grid 20 makes it possible in particular to protect this cooling module 22.

As shown in Figure 2, the cooling module 22 is intended to be crossed by an air flow E parallel to the direction X and going from the front to the rear of the vehicle 10. This direction X corresponds more particularly to a longitudinal direction of the cooling module 22 through which the air flow F is intended to enter the cooling module 22. The rear corresponds to the rear of the motor vehicle 10 or to the face of the cooling module 22 by which the air flow F is intended to emerge from the cooling module 22.

The cooling module 22 essentially comprises a housing or fairing 40 forming an internal channel between an upstream end 40a and a downstream end 40b opposite each other. Inside said fairing 40 is arranged at least one heat exchanger 24, 26, 28. This internal channel is preferably oriented parallel to the longitudinal direction X so that the upstream end 40a is oriented towards the front of the vehicle 10 facing the cooling bay 18 and so that the downstream end 40b is oriented towards the rear of the vehicle 10. In Figure 2, the cooling module 22 comprises three heat exchangers 24, 26, 28 grouped at the within a set of heat exchangers 23. It could however include more or less depending on the desired configuration.

[0038] A first heat exchanger 24 can for example be configured to release heat energy from the air flow F. This first heat exchanger 24 can more particularly be a condenser connected to a cooling circuit (not shown). , for example in order to cool the batteries of the vehicle 10. This cooling circuit can for example be an air conditioning circuit capable of cooling the batteries as well as an internal air flow intended for the passenger compartment of the motor vehicle.

[0039] A second heat exchanger 26 can also be configured to release heat energy into the air flow F. This second heat exchanger 26 can more particularly be a radiator connected to a thermal management circuit (not shown ) of electrical elements such as the electric motor 12.

The first heat exchanger 24 generally being a condenser of an air conditioning circuit, the latter needs the air flow F to be as “fresh” as possible in air conditioning mode. For this, the second heat exchanger 26 is preferably arranged downstream of the first heat exchanger 24 in the longitudinal direction arranged upstream of the first heat exchanger 24.

The third heat exchanger 28 can also be configured to release heat energy into the air flow. This third heat exchanger 28 can more particularly be a radiator connected to a thermal management circuit (not shown), which can be distinct from that connected to the second heat exchanger 26, for electrical elements such as power electronics. It is also entirely possible to imagine that the second 26 and the third 28 heat exchangers are connected to the same thermal management circuit, for example connected in parallel to each other. [0042] Still according to the example illustrated in Figure 2, the second heat exchanger 26 is arranged downstream of the first heat exchanger 24 while the third heat exchanger 28 is arranged upstream of the first heat exchanger 24. D other configurations can nevertheless be envisaged such as for example the second 26 and third 28 heat exchangers both arranged downstream or upstream of the first heat exchanger 24.

[0043] In the embodiment illustrated in Figure 2, each of the heat exchangers 24, 26, 28 has a general parallelepiped shape determined by a length, a thickness and a height. The length extends along the Y direction, the thickness along the X direction and the height in the Z direction. The heat exchangers 24, 26, 28 then extend along a general plane parallel to the direction vertical Z and the lateral direction Y. This general plane is preferably perpendicular to the longitudinal direction X of the cooling module 22.

The cooling module 22 also includes a first collector housing 41 arranged downstream of the set of heat exchangers 23 in the direction of circulation of the air flow. This first collector box 41 includes an outlet 22b of the air flow F. This first collector box 41 thus makes it possible to recover the air flow F passing through the set of heat exchangers 23 and to direct this air flow F towards exit 22b. The first collector box 41 can come as one piece with the fairing 40 or be an insert fixed to the downstream end 40b of said fairing 40.

The collector housing 41 comprises one or more side walls 411, 412 and 413 forming a conduit in which the air flow F is intended to circulate and which extend in the extension of the internal conduit of the fairing 40. In the embodiment illustrated in Figure 2, the internal conduit of the fairing 40 has a general parallelepiped shape, the upstream part of the collector housing 41 extending the internal conduit of the fairing 40 also has a general parallelepiped shape.

The collector housing 41 more particularly comprises an upper side wall 411 and a lower side wall 412 which each extend in a plane substantially parallel to that generated by the axes X and Y. The upper side wall 411 and the side wall lower 412 are located opposite each other. The collector housing 41 also comprises two transverse side walls 413 which each extend in a plane substantially parallel to that generated by the axes X and Z. The two transverse side walls 413 serve as a junction between the upper side wall 411 and the side wall lower 412, the transverse side walls 413 are located opposite each other.

[0047] By upper and lower, we mean here an orientation in the direction Z. A so-called upper element will be closer to the roof of the vehicle 10 and a so-called lower element will be closer to the ground.

[0048] The distance in the Z direction between the upper side wall 411 and the lower side wall 412 is in particular equal to or greater than the individual height of one of the heat exchangers 24, 26, 28. Similarly, 'gap following the Y direction between the transverse side walls 413 is for example equal to or greater than the individual length of the heat exchangers 24, 26, 28.

[0049] According to embodiments not illustrated in the figures, the internal conduit of the fairing 40 and the collector box 41 may have a section of shape different from that of a quadrilateral. This section can in particular take the form of a hexagon (in this case the fairing 40 and the collector box 41 respectively have six side walls), of an octagon (in this case the fairing 40 and the collector box 41 respectively have eight walls lateral) or even a circular shape (in this case the fairing 40 and the collector housing 41 are cylindrical in shape and each have a single side wall which forms the mantle of the cylinder). The section depends mainly on the geometry of at least one heat exchanger 24, 26, 28 arranged in the internal conduit of the fairing 40.

The cooling module 22, more precisely the collector housing 41, also comprises at least one tangential fan, also called tangential turbomachine 30 configured so as to generate the air flow F passing through the set of heat exchangers 23 This tangential turbomachine 30 is arranged in the collector housing 41 such that the transverse side walls 413 of the collector housing 41 are substantially perpendicular to the axis of rotation A of the turbine 32, as illustrated more particularly in Figure 3. The transverse side walls 413 are located more particularly on either side of the ends of the turbomachine 30.

The tangential turbomachine 30 comprises a rotor or turbine 32 of substantially cylindrical shape. The turbine 32 advantageously comprises several stages of blades (or blades), visible in Figures 3 to 9. The turbine 32 is rotatably mounted around an axis of rotation A which is for example parallel to the direction Y. The diameter of the turbine 32 is for example between 35 mm and 200 mm to limit its size. The tangential turbomachine 30 is thus compact.

[0052] The tangential turbomachine 30 can also include a motor 31 (visible in Figures 2 to 5) configured to rotate the turbine 32. The motor 31 is for example adapted to drive the turbine 32 in rotation, at a speed comprised between 200 rpm and 14,000 rpm. This makes it possible in particular to limit the noise generated by the tangential turbomachine 30.

[0053] In the examples illustrated in Figures 2 to 9, the tangential turbomachine 30 is in a high position, particularly in the upper third of the collector housing 41, preferably in the upper quarter of the collector housing 4L. This makes it possible in particular to protect the tangential turbomachine 30 in the event of submersion and/or to limit the size of the cooling module 22 in its lower part. In this case, the air outlet 22b of the air flow F is preferably oriented towards the lower part of the cooling module 22.

[0054] It is nevertheless possible to imagine that the tangential turbomachine 30 is in a low position, particularly in the lower third of the collector housing 4L. This would make it possible to limit the size of the cooling module 22 in its upper part. In this case Figure, the air outlet 22b of the air flow will preferably be oriented towards the upper part of the cooling module 22. Alternatively, the tangential turbomachine 30 can be in a median position, in particular in the middle third of the height of the first collector box 41, for example for reasons of integration of the cooling module 22 into its environment. These alternatives are not illustrated.

The turbine 32 is in particular arranged in the center of a volute 44 configured to guide the air flow F towards the air outlet 22b. The volute 44 thus comprises a curved external wall 440 formed by the upper side wall 411 or lower 412 depending on the position of the tangential turbomachine 30 and the orientation of the air outlet 22b. Indeed, if the tangential turbomachine 30 is in the high position as illustrated in Figures 2 to 9, the curved external wall 440 will then be the upper side wall 411 of the collector housing 41 and the air outlet 22b will be oriented downwards, that is to say towards the ground in the mounted state within the vehicle. On the contrary, if the tangential turbomachine 30 is in the low position (not shown), the curved external wall 440 will then be the lower side wall 412 of the collector housing 41 and the air outlet 22b will be oriented upwards, i.e. i.e. towards the roof of the vehicle in the mounted state within the vehicle.

[0056] In order to guide the air at the end of the set of heat exchangers 23 towards the air outlet 22b, the collector housing 41 comprises, arranged facing the downstream end 40b of the fairing 40, a wall 46 for guiding the air flow F towards the air outlet 22b. The guide wall 46 more particularly comprises an upstream edge 451 (visible in the sectional view figures 6 to 9) making it possible to delimit the air outlet 22b of the air flow F in a complementary manner with the volute 44. By edge upstream 451, here we mean the edge of the air outlet 22b closest to the downstream end 40b of the fairing 40.

[0057] The guide wall 46 can in particular be inclined relative to a plane PI oriented perpendicular to the longitudinal direction illustrated in particular in Figures 8 and 9. The angle a is for example between 10° and 23°. The inclination of the guide wall 46 allows better circulation of the air flow F within the collector box 41 and limits pressure losses.

[0058] As shown in Figures 3 to 7, the guide wall 46 can include at least one opening 01 as well as at least one pivoting flap 460 per opening. This at least one pivoting shutter 460 makes it possible to open or close F at least one opening 01. More particularly, said at least one pivoting shutter 460 is pivotally mounted between an open position and a closed position of said opening 01. The at least one pivoting flap 460 is mounted on an external face of the guide wall 46 so as to open towards the outside of the collector housing 4L

[0059] The guide wall 46 may comprise one or more openings 01. As a result, the cooling module 22 may comprise one or more flaps 460. There are in particular as many pivoting flaps 460 mounted on the external face of the wall guide 46 that there are openings 01. On the example of Figures 3 to 5, the number of openings 01 and shutters pivoting 460 rises to sixteen on the guide wall 46.

[0060] The at least one pivoting flap 460 is for example pivotally mounted around a pivot axis which extends horizontally in the mounted state within the motor vehicle 10 and in the plane formed by the guide wall 46 The at least one pivoting shutter 460 can take the form of a flag shutter or a butterfly shutter.

[0061] The at least one pivoting flap 460 can be “free” or “passive” in the sense that only gravity brings and maintains the pivoting flap 460 of the guide wall 46 in its closed position. In other words, the cooling module 22 does not include any mechanical part or control device configured to actively control the opening and/or closing of the pivoting shutter 460. The pivot axis of the pivoting shutter 460 is then arranged on one side upper of the opening 01 so as to passively fall back into the closed position, obstructing the opening 01. The pivoting flap 460 is therefore always subject to gravity, but when the motor vehicle 10 is traveling at a sufficiently high speed, the flow of The air F passing through the cooling module 22 can exert pressure on the pivoting shutter 460 so as to move the latter from its closed position to its open position. In this case, the air flow F passes through the opening 01 of the guide wall 46. In Figure 5, only two lower pivoting flaps 460 in the open position are shown.

[0062] Like the guide wall 46, the transverse side walls 413 can also include openings 02 as well as at least one pivoting flap 470 per opening 02, illustrated in Figures 3 to 7. This at least one pivoting flap 470 makes it possible to open or close the at least one opening 02. More particularly, said at least one pivoting shutter 470 is pivotally mounted between an opening position and a closing position of said opening 02. The at least one shutter 470 is mounted on an external face of the transverse side wall 413 so as to open towards the outside of the collector housing 4L

[0063] Each transverse side wall 413 may comprise one or more openings 02. As a result, the cooling module 22 may comprise one or more pivoting flaps 470. There are in particular as many pivoting flaps 470 mounted on the transverse side walls 413. that there are openings 02. On the example of Figures 3 and 5, the number of pivoting shutters 470 amounts to three.

The at least one flap 470 is for example mounted to pivot around a pivot axis which extends horizontally in the mounted state within the motor vehicle 10 and according to the plane formed by the transverse side walls 413. The at least one pivoting shutter 470 can take the form of a flag shutter or a butterfly shutter.

[0065] The at least one pivoting flap 470 can also be “free” or “passive” in the sense that only gravity brings and maintains the pivoting flap 470 in its closed position. In other words, the cooling module 22 does not include any mechanical part or control device configured to actively control the opening and/or closing of the pivoting shutter 470. The pivot axis of the pivoting shutter 470 is then arranged on one side upper of the opening 02 so as to passively fall back into the closed position. THE pivoting flap 470 is therefore always subject to gravity, but when the motor vehicle 10 travels at a sufficiently high speed, the air flow F passing through the cooling module 22 can exert pressure on the pivoting flap 470 so as to move it -this from its closed position to its open position. In this case, the air flow F passes through the opening 02 of the transverse side walls 413. When the tangential turbomachine 30 is in operation, a vacuum is created upstream of the turbine 32 maintaining the pivoting flaps 470 in the closed position .

[0066] As shown in Figures 6 and 7, the upper side wall 411 or lower 412 opposite the curved outer wall 440 of the volute 44 may also include at least one opening 03 as well as at least one pivoting flap 480 per opening 03. This at least one pivoting shutter 480 makes it possible to open or close F at least one opening 03. More particularly, said at least one pivoting shutter 480 is pivotally mounted between an opening position and a closing position of said opening 03. The at least one pivoting flap 480 is mounted on an external face of the upper side wall 411 or lower 412 opposite the curved external wall 440 of the volute 44 so as to open towards the outside of the collector housing 4L In the example illustrated in Figures 6 and 7, the opening 03 and the at least one pivoting flap 480 are arranged on the lower side wall 412 due to the fact that the volute 44 and the tangential turbomachine 30 are in the high position and that the wall external curve 440 of the volute 44 is formed by the upper side wall 411.

[0067] The upper side wall 411 or lower 412 opposite the curved outer wall 440 of the volute 44 may comprise one or more openings 03. As a result, the cooling module 22 may comprise one or more pivoting flaps 480. There has in particular as many pivoting flaps 480 mounted on the upper side wall 411 or lower 412 opposite the curved outer wall 440 of the volute 44 as there are openings 03.

[0068] The at least one pivoting flap 480 is for example pivotally mounted around a pivot axis which extends horizontally in the mounted state within the motor vehicle 10 and according to the plane formed by the upper side wall 411 or lower 412 opposite the curved outer wall 440 of the volute 44. The at least one pivoting shutter 480 can take the form of a flag shutter or a butterfly shutter.

[0069] The at least one pivoting flap 480 can also be “free” or “passive” in the sense that only gravity brings and maintains the pivoting flap 480 in its closed position when it is on the upper side wall 411 and in its open position when it is on the lower side wall 412. In other words, the cooling module 22 does not include any mechanical part or control device configured to actively control the opening and/or closing of the shutter pivoting flap 480. The pivoting flap 480 is therefore always subject to gravity, but when the motor vehicle 10 travels at a sufficiently high speed, the air flow F passing through the cooling module 22 can exert pressure on the pivoting flap 480 of so as to move it from its closed position to its open position. In this case, the air flow F passes through at least one opening 03 of the upper side wall 411 or lower 412 opposite the curved outer wall 440 of the volute 44. When the tangential turbomachine 30 is in operation, a vacuum is created upstream of the turbine 32 passively closing the pivoting flap 480 when this the latter is placed on the lower wall 412.

[0070] As shown in Figures 4 to 9, the volute 44 and more particularly its curved external wall 440, comprises at least one opening 04 as well as at least one closing device 43 of said opening 04. In the examples illustrated in Figures 4 to 9, the curved outer wall 440 is formed by the upper side wall 411 of the collector housing 41 because the volute 44 is in the high position. The shutter device 43 is movable between an open position in which the air flow F can pass through the opening 04 and a closed position in which the shutter device 43 obstructs said opening 04.

[0071] The presence of such an opening 04 and its closing device 43 makes it possible to facilitate the evacuation of the air flow F by limiting pressure losses and aerodynamic resistance when the vehicle 10 is in motion and that the tangential turbomachine 30 is stopped.

[0072] According to a first embodiment illustrated in Figures 4 to 7, the shutter device 43 comprises a pivoting shutter 490 comprising a pivot axis disposed on one of the sides of the opening 04 of the curved external wall 440. The shutter pivoting 490 can thus be a flag type shutter.

[0073] The pivot axis of the pivoting flap 490 can in particular be arranged on an upper side of the opening 04. By upper, we mean here a side of the opening 04 placed on the top of the latter, this is that is to say the closest to the roof of the vehicle 10 in the assembled state. This positioning of the pivot axis of the pivoting shutter 490 allows the latter to be “free” or “passive” in the sense that only gravity brings and maintains the pivoting shutter 490 in its closed position. In other words, the cooling module 22 does not include any mechanical part or control device configured to actively control the opening and/or closing of at least one pivoting shutter 490. The pivoting shutter 490 is therefore always subject to gravity, but when the motor vehicle 10 is traveling at a sufficiently high speed, the air flow F passing through the cooling module 22 can exert pressure on the pivoting flap 490 so as to move the latter from its closed position to its position d 'opening. In this case, the air flow F passes through the opening 04 of the curved external wall 440.

[0074] In the example illustrated in Figures 4 and 5, the curved outer wall 440 has three lines along the Y axis each comprising four openings 04. On these three lines only the openings 04 closest to the motor 31 are represented with a pivoting shutter 490.

[0075] The pivoting flap 490 may in particular comprise an internal wall of curved shape so as to match the curvature of the curved external wall 440 in the closed position. This makes it possible in particular to present the smoothest possible internal surface of the volute 44. in order to facilitate the circulation of the air flow F when the tangential turbomachine 30 is in operation and the pivoting flaps 490 are in the closed position, as illustrated in Figure 6.

[0076] According to a second embodiment illustrated in Figures 8 and 9, the shutter device 43 may include an extension 441 projecting from the curved outer wall 440 towards the outside of the collector housing 41 and at least partially surrounding the opening 04. This extension 441 may in particular comprise an upper wall 441a extending an upper side of the opening 04 and two side walls extending the lateral sides of the opening 04. The extension 441 more particularly extends the opening 04 towards an exit of air. This air outlet can in particular be flat in order to cooperate with the shutter device 43. The shutter device 43 comprises a pivoting flap 490' around a pivot axis arranged on said extension 441 so as to close its air outlet in the closed position and open outwards in the open position.

[0077] The pivot axis of the pivoting flap 490' can in particular be arranged on the upper wall 441a of the extension 441. By upper, we mean here a wall of the extension 441 placed on the top of the latter, c that is to say the closest to the roof of the vehicle 10 in the assembled state. This positioning of the pivot axis of the pivoting shutter 490' allows the latter to be "free" or "passive" in the sense that only gravity brings and maintains the pivoting shutter 490' in its closed position. In other words, the cooling module 22 does not include any mechanical part or control device configured to actively control the opening and/or closing of the pivoting shutter 490'. The pivoting flap 490' is therefore always subject to gravity, but when the motor vehicle 10 is traveling at a sufficiently high speed, the air flow F passing through the cooling module 22 can exert pressure on the pivoting flap 490' so to move it from its closed position to its open position. In this case, the air flow F passes through the opening 04 of the curved external wall 440.

[0078] Whether for the first embodiment of Figures 4 to 7 or for the second embodiment of Figures 8 and 9, in the open position, the shutter device(s) 43 may in particular have a lower height at a maximum height of the curved outer wall. This makes it possible to limit the general size of the cooling module 22 within the motor vehicle. For this, the openings 04 and/or the shutter devices 43 may include stops (not shown) limiting the travel of the shutter device 43 in the open position.

[0079] In the closed position, the closing of the opening 04 can in particular be watertight.

For this, the collector box 41 may include a sealing means between the opening 04 and the pivoting flap 490, 490' in the closed position. This sealing means can for example be a seal (not shown) placed on the pivoting flap 490, 490' at the level of its contact surface with the sides of the opening 04 according to the first embodiment of Figures 4 to 7 or its contact surface with the extension 441 according to the second mode embodiment of Figures 8 and 9. According to an alternative, the sealing means can be arranged not on the flap 490, 490 'but directly on the sides of the opening 04 according to the first embodiment or on the sides of the air outlet of the extension 441 according to the second embodiment.

[0080] As illustrated in Figures 10 and 11, the collector box 41 also includes at least one stop 60 configured to limit the opening angle of at least one shutter flap 460, 470, 480, 490, 490' in the open position. Limiting the opening angle of a flap 460, 470, 480, 490, 490' makes it possible in particular, depending on which side it is placed, to limit the general size of the collector box 41 and therefore of the storage module. cooling 22.

[0081] Advantageously and as shown in the examples described above and in Figures 3 to 11, the guide wall 46 and/or the at least one side wall 411, 412, 413 may comprise a plurality of shutter flaps 460, 470, 480, 490, 490'. The stops 60 are configured so that the different shutter shutters 460, 470, 480, 490, 490' have opening angles specific to each shutter shutter 460, 470, 480, 490, 490'. It is thus possible to limit the opening angle of each shutter flap 460, 470, 480, 490, 490' individually according to the conformation of the housing in which the collector box 41 and the surrounding elements of the cooling module will be placed. 22.

[0082] When the lower side wall 412 of the collector housing 41, as illustrated in Figures 10 and 11, comprises at least one opening 03 and at least one shutter flap 480, the at least one stop 60 can be configured to that the opening angle of said shutter 480 is less than or equal to 7°, preferably 5°. This limitation of the opening angle of the shutter flap 480 arranged on the lower side wall 412 makes it easier to move into the closed position when the tangential turbomachine 30 is in operation and creates a depression within the closing collector housing 41 said shutter flap 480.

[0083] According to a first embodiment illustrated in Figures 10 and 11, the at least one stop 60 can be placed on the at least one shutter flap 460, 470, 480, 490, 490'. One or more stops 60 can be arranged on the same shutter flap 460, 470, 480, 490, 490'. For example, a shutter shutter 460, 470, 480, 490, 490' may include two stops 60, more precisely a stop 60 arranged at each end of its pivot axis. Other locations and other numbers of stops 60 can certainly be considered.

[0084] According to a first alternative of this first embodiment, the at least one stop 60 can come integrally with the at least one shutter flap 460, 470, 480, 490, 490'.

[0085] According to a second alternative, the at least one stop 60 is a part fixed to the at least one shutter flap 460, 470, 480, 490, 490'. This makes it possible in particular to modulate the opening angle of the shutter shutter 460, 470, 480, 490, 490' simply by changing the stop 60 according to needs.

[0086] According to a second embodiment not shown, the at least one stop 60 can be arranged on at least one side wall 411, 412, 413 and/or guide wall 46 of the collector housing 41. One or more stops 60 can be arranged on the same side wall 411, 412, 413 and/or guide wall 46. For example, the same side wall 411, 412, 413 and/or guide wall 46 may include two stops 60, more precisely a stop 60 disposed on each side of the opening 01, 02, 03, 04. other locations and other numbers of stops 60 can certainly be considered.

[0087] According to a first alternative of this second embodiment, the at least one stop 60 can be integral with the at least one side wall 411, 412, 413 and/or guide wall 46 of the collector housing 41. 0088] According to a second alternative of this second embodiment, the at least one stop

60 can be a part fixed to at least one side wall 411, 412, 413 and/or guide wall 46 of the collector housing 41. This makes it possible in particular to modulate the opening angle of the shutter 460, 470 , 480, 490, 490' simply by changing the stop 60 as needed. [0089] Thus, we can clearly see that due to the presence of the stops 60 it is possible to limit the opening angle of the shutter shutters 460, 470, 480, 490, 490' in particular in order to adapt to the environment around the cooling module 22 within the motor vehicle

10

Claims

[Claim 1] Collector box (41) for a cooling module (22) of an electric or hybrid motor vehicle (10), said collector box (41) being intended to be crossed by an air flow (F), said collector housing (41) a tangential turbomachine (30) configured to generate the air flow (F), the collector housing (41) further comprising:

- at least one side wall (411, 412, 413) forming a conduit in which the air flow (F) is intended to circulate,

- a volute (44) configured to guide the air flow (F) towards the air outlet (22b) and within which the tangential turbomachine (30) is arranged, and

- a guide wall (46) for the air flow (F) towards the air outlet (22b), the guide wall (46) and/or the at least one side wall (411, 412, 413) comprising at least one opening (01, 02, 03, 04) as well as at least one shutter flap (460, 470, 480, 490, 490') pivotally mounted between an open position and a closed position of said opening (01, 02, 03, 04), characterized in that the collector housing (41) comprises at least one stop (60) configured to limit the opening angle of the at least one shutter flap (460, 470, 480, 490, 490') in the open position.

[Claim 2] Collector box (41) according to claim 1, characterized in that the at least one stop (60) is arranged on the at least one shutter flap (460, 470, 480, 490, 490' ).

[Claim 3] Collector box (41) according to claim 2, characterized in that the at least one stop (60) is integral with the at least one shutter (460, 470, 480, 490, 490 ').

[Claim 4] Collector box (41) according to claim 2, characterized in that the at least one stop (60) is a part fixed to the at least one shutter flap (460, 470, 480, 490, 490').

[Claim 5] Collector housing (41) according to claim 1, characterized in that the at least one stop (60) is arranged on the at least one side wall (411, 412, 413) and/or guide wall (46) of the collector box (41).

[Claim 6] Collector housing (41) according to claim 5, characterized in that the at least one stop (60) is integral with the at least one side wall (411, 412, 413) and/or wall of guide (46) of the collector box (41).

[Claim 7] Collector box (41) according to claim 5, characterized in that the at least one stop (60) is a part fixed to the at least one side wall (411, 412, 413) and/or wall guide (46) of the collector housing (41).

[Claim 8] Collector housing (41) according to any one of the preceding claims, characterized in that the guide wall (46) and/or F at least one side wall (411, 412, 413) and/or wall of guidance (46) comprise a plurality of shutter flaps (460, 470, 480, 490, 490') and the stops (60) are configured so that the different shutter flaps (460, 470, 480, 490, 490 ') have opening angles specific to each shutter shutter (460, 470, 480, 490, 490').

[Claim 9] Collector box (41) according to any one of the preceding claims, characterized in that the collector box (41) comprises a lower side wall (412) comprising at least one opening (03) and at least one shutter. shutter (480), F at least one stop (60) is configured so that the opening angle of said at least one shutter flap (480) is less than or equal to 7°.

[Claim 10] Cooling module (22) for an electric or hybrid motor vehicle (10), said cooling module (22) being intended to be crossed by an air flow (F) and comprising:

- a fairing (40) forming an internal conduit in a longitudinal direction (X) of the cooling module (22) inside which is arranged at least one heat exchanger (24, 26, 28) intended to be crossed by the air flow (F), and

- a collet box (41) according to any one of the preceding claims, said collet box (41) being arranged downstream of the fairing (40) in the longitudinal direction (X).