EP4077012A1

EP4077012A1 - Ventilation device module for a motor vehicle cooling module, ventilation device comprising such a module, and cooling module for a motor vehicle comprising such a ventilation device

Info

Publication number: EP4077012A1
Application number: EP20842267.5A
Authority: EP
Inventors: Kamel Azzouz; Sébastien Garnier; Amrid MAMMERI
Original assignee: Valeo Systemes Thermiques SAS
Current assignee: Valeo Systemes Thermiques SAS
Priority date: 2019-12-20
Filing date: 2020-12-07
Publication date: 2022-10-26
Also published as: FR3105367A1; CN115003533A; WO2021123555A1; US20230147766A1

Abstract

`The invention relates to a module, comprising: - at least one, preferably only one, tangential turbomachine (28-1; 28-2) comprising a bladed wheel (32-1; 32-2) and a motor (33-1; 33-2) for rotationally driving the bladed wheel (32-1; 32-2), - a frame (30-1; 30-2) forming an opening (60-1; 60-2), preferably only one opening, - a shut-off means (62-1; 62-2) designed to selectively shut off the opening (60-1; 60-2), the shut-off means (62-1; 62-2) having at least two regions which, in contact in a position of the shut-off means (62-1; 62-2) in which the opening (60-1; 60-2) is left free, are at a distance apart in a position in which they shut off the opening (60-1; 60-2).

Description

VENTILATION DEVICE MODULE FOR MOTOR VEHICLE COOLING MODULE, VENTILATION DEVICE INCLUDING SUCH MODULE AND COOLING MODULE FOR MOTOR VEHICLE INCLUDING SUCH VENTILATION DEVICE

Technical area

The invention relates to a ventilation device for a motor vehicle cooling module and to a cooling module for a motor vehicle, in particular an electric vehicle, comprising such a ventilation device. The invention also relates to a motor vehicle provided with such a cooling module.

Prior art

[0002] Motor vehicles, whether combustion or electric, need to remove the calories generated by their operation and are therefore equipped with heat exchangers. A motor vehicle heat exchanger generally comprises tubes, in which a heat transfer fluid is intended to circulate, in particular a liquid such as water, and heat exchange elements connected to these tubes, often designated by the term " fins ”or“ spacers ”. The fins increase the exchange surface between the tubes and the ambient air.

However, in order to further increase the heat exchange between the heat transfer fluid and the ambient air, it is common for a ventilation device to be used in addition, to generate or increase an air flow directed towards tubes and fins.

In known manner, such a ventilation device comprises a propeller fan.

The air flow generated by the blades of such a fan is turbulent, in particular due to the circular geometry of the propeller, and generally only reaches part of the surface of the exchanger. heat (circular area of the exchanger facing the fan propeller). The heat exchange does not therefore take place homogeneously over the entire surface of the tubes and fins.

[0006] In addition, when starting the fan is not necessary (typically when the heat exchange with unaccelerated ambient air is sufficient to cool the coolant circulating in the exchanger), the blades partially obstruct the flow of ambient air to the tubes and fins, which hinders the flow of air to the exchanger and thus limits the heat exchange with the coolant.

[0007] Such a fan is also relatively bulky, in particular because of the dimensions of the propeller necessary to obtain effective engine cooling, which makes its integration into a motor vehicle long and difficult.

[0008] The aim of the invention is to at least partially remedy these drawbacks.

Disclosure of the invention

To this end, the invention relates to a ventilation device module for a motor vehicle cooling module, comprising at least one, preferably a single, tangential turbomachine comprising a paddle wheel and a motor for driving in rotation of the paddle wheel, a frame forming an opening, preferably a single one, a sealing means adapted to selectively sealing the opening, the sealing means having at least two zones which, in contact in a position of the means of shutter leaving free the opening, are distant in a position of closing the opening.

[0010] Thus, advantageously, a ventilation device module has a small footprint, facilitating its integration into a motor vehicle.

In addition, the position of the closure means leaving the opening in the frame free, makes it possible to reduce the pressure losses of the air flow passing through the cooling module, in particular when the implementation of the tangential turbomachine is not necessary.

[0012] According to another aspect, the closure means comprises a covering body adapted to be wound on itself around an axis, to leave the opening free. [0013] According to another aspect, the module comprises a motor driving in rotation a shaft fixed to the covering body, such that the rotation of the motor wraps the covering body around the shaft.

[0014] According to another aspect, the module further comprises reels, connected to the covering body by means of cables, the reels elastically constraining the covering body towards the closing position of the opening.

According to another aspect, the covering body is guided in movement relative to the frame, in particular the covering body is received in a groove in the frame.

According to another aspect, the covering body is flexible.

[0017] According to another aspect, the covering body is in one piece, in the form of a flexible sheet, capable of covering the opening.

[0018] According to another aspect, the tangential turbomachine comprises an air guide portion and an air outlet outside the ventilation device module.

[0019] According to another aspect, the tangential turbomachine comprises an air guide portion and an air outlet outside the ventilation device module.

[0020] The subject of the invention is also a ventilation device for a motor vehicle cooling module, comprising at least one ventilation device module as described above.

According to another aspect, the device comprises two ventilation device modules, each ventilation device module defining a separate opening.

According to another aspect, the turbomachines of the two ventilation device modules are arranged so that the air outlet of the turbomachine of a first ventilation device module is arranged opposite the air outlet of the turbomachine of the second ventilation device module.

According to another aspect, the turbomachines of the two ventilation device modules are arranged so that the air outlet of the turbomachine of a first ventilation device module is arranged opposite the guide portion of the turbomachine of the second ventilation device module. According to another aspect, the turbomachines of the two ventilation device modules are arranged so that the guide portion of the turbomachine of a first ventilation device module is arranged opposite the guide portion of the turbomachine of the second ventilation device module.

[0025] The subject of the invention is also a cooling module for a motor vehicle, in particular an electric motor, comprising at least one heat exchanger, and a ventilation device as described above, adapted to create a flow of air to through the at least one heat exchanger.

According to another aspect, the volute of each turbomachine comprises a casing consisting of a shaped wall to house the impeller and guide the air around the turbomachine to an air outlet, intended to be an air outlet outside the cooling module.

According to another aspect, said wall has the shape of a truncated spiral.

[0028] According to another aspect, the module comprises a protective grid, preferably fixed to said outlet.

[0029] According to another aspect, the frame defines an opening, intended to be arranged facing, in a longitudinal direction of the vehicle, at least part of the heat exchanger of the cooling module. Alternatively, the opening can be intended to be placed opposite a clean heat exchanger.

[0030] In another aspect, the frame includes a cross member, which extends from one side of the opening, opposite to a side where the turbomachine is located.

[0031] In another aspect, the crosspiece extends in a transverse direction of the vehicle.

[0032] According to another aspect, the covering body can be of limited thickness.

[0033] In another aspect, the covering body is airtight.

[0034] According to another aspect, the covering body takes the form of a flexible sheet, the sheet preferably being in one piece. According to another aspect, the shaft shaped to be driven in rotation by the motor extends in the vicinity of a first end of the opening, in the vicinity of said at least one turbomachine.

[0036] According to another aspect, the shaft preferably extends in the vicinity of a first end of the opening, in the vicinity of the first or of the second turbomachine.

According to another aspect, the covering body is fixed at one end, to a rod.

According to another aspect, the rod is slidably mounted on the frame

According to another aspect, a groove is hollowed out in the frame, on each side of the latter.

According to another aspect, each groove receives a lug of the rod.

According to another aspect, the covering body is also received in these grooves on each side of the frame.

According to another aspect, the rod is connected, in particular by two cables, to at least one winder.

[0043] According to another aspect, the reel is mounted elastically constrained in rotation to a position of winding the cables in the associated reel.

[0044] According to another aspect, the cables are arranged so as to wind on pulleys provided each time between the cross member and a reel.

[0045] According to another aspect, the module is shaped so that, in the position of maximum cable winding, the covering body completely covers the opening.

According to another aspect, the covering body forms an angle of between 5 ° and 20 °, preferably substantially equal to 12.5, with an air inlet surface, normal to the air flow at the inlet of the ventilation device.

According to another aspect, the device comprises two modules, the frame of the ventilation device consists of a single piece, in one piece, a cross member preferably separating the openings of each module, or, alternatively, the frame of the ventilation device is formed by frames of separate modules, fixed together.

According to another aspect, the turbomachines are positioned so as to be dedicated to respective exchangers.

According to another aspect, the device is shaped so that the openings can only be partially closed.

[0050] According to another aspect, the device is shaped so that the openings of the two modules can be closed, in whole or in part, independently of one another.

According to another aspect, the device is shaped to allow a part of the air flow to pass through the opening of a module of reduced size, another part of the air flow being guided towards the turbomachine. from another module.

According to another aspect, the covering body is formed of blades interconnected by articulations of such kind that the blades can be pivoted with respect to each other.

[0053] According to another aspect, the covering body is arranged so that, in a position leaving the opening free, the covering body is wrapped around a tree or retracted or folded up.

According to another aspect, the ventilation device 24 comprises two modules or a single module or more than two modules.

Brief description of the drawings

[0055] Other features, details and advantages of the invention will become apparent on reading the detailed description below, and on analyzing the accompanying drawings, in which:

[0056] [Fig. 1] schematically represents the front part of a motor vehicle, seen from the side;

[0057] [Fig. 2] is a schematic perspective view of a first example of a cooling module, which can be implemented in the motor vehicle. of Figure 1, comprising a ventilation device in a first configuration in which two openings through the frame of the ventilation device are left free;

[0058] [Fig. 3] is a perspective view of a ventilation device module making up the ventilation device of FIG. 3, in a configuration leaving an opening free through its frame;

[0059] [Fig. 4] is a perspective view of the ventilation device module of Figure 3, in a configuration closing the opening through its frame;

[0060] [Fig. 5] is a perspective view of the cooling module of FIG. 2, in a second configuration in which the openings through the frame of the ventilation device are closed;

[0061] [Fig. 6] is a longitudinal sectional view of the ventilation module, in the configuration of FIG. 5;

[0062] [Fig. 7] is a view similar to Figure 5, in a configuration of partial release the openings;

[0063] [Fig. 8] is a view similar to Figures 6 and 7, in another configuration of the ventilation device in which an opening in the frame is left free while a second opening is closed;

[0064] [Fig. 9] is a schematic perspective view of a second example of a cooling module, which can be implemented in the motor vehicle of FIG. 1;

[0065] [Fig. 10] is a schematic perspective view of a third example of a cooling module, which can be implemented in the motor vehicle of FIG. 1.

Description of embodiments

In the remainder of the description, identical elements or elements of identical function bear the same reference sign. For the sake of brevity of the present description, these elements are not described in detail in each embodiment. On the contrary, only the differences between the variant embodiments are described in detail. In the figures, there are illustrated marks (X, Y, Z). The direction X corresponds to a direction, longitudinal, of advance of the motor vehicle. The Y direction, transverse, is defined as being perpendicular to the longitudinal direction X. More specifically, the longitudinal X and transverse Y directions can for example belong to a horizontal plane. The Z direction corresponds in turn to a vertical direction.

FIG. 1 schematically illustrates the front part of a motor vehicle 10 with a motor 12. The vehicle 10 comprises in particular a body 14 and a bumper 16 carried by a frame (not shown) of the motor vehicle 10. The body 14 defines a cooling bay 18, that is to say an opening through the body 14. The cooling bay 18 can be unique as in the example illustrated. Alternatively, however, the body 14 can define a plurality of cooling bays. Here, the cooling bay 18 is located in the lower part of the front face 14a of the body 14. In the example illustrated, the cooling bay 18 is located under the bumper 16. A grid 20 can be arranged in the cooling bay 18 to prevent projectiles from passing through the cooling bay 18. A cooling module 22 is placed opposite the cooling bay 18. The grid 20 makes it possible in particular to protect this cooling module 22.

The cooling module 22 is more clearly visible in Figure 2.

The cooling module 22 comprises a ventilation device 24 associated with at least one heat exchanger 26, in this case with two heat exchangers 26.

In this case, the two heat exchangers 26 are arranged one behind the other in the longitudinal direction X. The two heat exchangers 26 are here identical. Each heat exchanger 26 has a general parallelepipedal shape, a length of which extends parallel to the transverse direction Y, the depth extends parallel to the longitudinal direction X, and a height extends parallel to the vertical direction Z. Each exchanger thermal 26 delimits a surface S, called a work surface, substantially rectangular, extending along a plane (Y, Z). The surface S is delimited by two opposite sides 26-1, 26-2 corresponding to the length of the exchanger 26 considered, and by two other opposite sides corresponding to the height of the exchanger 26 considered.

It is noted that the invention is not limited to a particular number of heat exchangers, nor to configurations comprising only identical heat exchangers. It is thus possible to juxtapose several heat exchangers vertically and / or horizontally, in which case the height of the surface S is the sum of the heights of the exchangers juxtaposed vertically, and the length of the surface S is the sum of the lengths of the exchangers juxtaposed horizontally.

Furthermore, the ventilation device 24 is here formed by two ventilation device modules 100-1, 100-2, of the type illustrated in FIGS. 3 and 4.

In the following, the module 100-1 of Figures 3 and 4 is described in more detail, the module 100-2 being similar. Unless otherwise stated, the elements of the second module 100-2, identical to the elements of the first module 100-1, bear in the figures the same reference sign with the suffix "-2" instead of the suffix "- 1> >.

As visible in Figure 3, the module 100-1 comprises a tangential fan 28-1, or more generally a tangential turbomachine, intended to suck a flow of air in contact with the heat exchangers 26 of the cooling module 22. Of course, the invention is not limited to this configuration, and the turbomachine can be mounted as a fan, in which case the ventilation device is placed between the shell and the exchangers.

The tangential turbomachine 28-1 comprises a rotor 32-1. The rotor here consists of a 32-1 turbine, more precisely of a tangential propeller or paddle wheel. The turbine 32-1 has a cylindrical shape. The turbine 32-1, 32-2 advantageously comprises several stages of blades (or vanes). The turbine 32-1 is rotatably mounted about an associated axis of rotation A32-1. The turbine 32-1 is driven in rotation by an associated motor 33-1. The axis of rotation A32-1 of the turbine 32-1 is here oriented in the direction of the Y axis.

The module 100-1 also comprises a frame 30-1 forming an internal air channel. The frame 30-1 makes it possible to house the turbine 32-1. In a mode of embodiment, a rear part of the frame 30-1 forms the volute of the tangential turbomachine 28-1.

The volute of the turbomachine 28-1 here comprises a casing 40-1 consisting of a wall 42-1 shaped to house the impeller 32-1 and guide the air around the turbomachine 28-1 up to at an air outlet 46-1, intended to be an air outlet outside the cooling module 22. In known manner, the wall 42-1 has the shape of a truncated spiral.

Advantageously, a grid is attached to the outlet 46-1. Such a grid can in particular make it possible to prevent projections from entering the housing receiving the turbine 32-1 and damaging this turbine 32-1.

As illustrated in Figure 3, in particular, the frame 30-1 defines an opening 60-1, intended to be disposed facing, in the longitudinal direction X, at least part of the heat exchanger 26 of the cooling module 22. Alternatively, however, the opening 60-1, 60-2 may be intended to be placed opposite a heat exchanger 26 of its own.

The frame 30-1 includes a cross member 61 -1, which extends from one side of the opening 60-1, opposite to the side where the turbomachine 28-1 is located. The traverse 61 -

I extends here substantially in the transverse direction Y.

The 100-1 module illustrated in Figures 3 and 4 further comprises a closure means 62-1 to close the opening 60-1. The sealing means 62-1 is adapted to selectively close the opening 60-1. Remarkably, the closure means 62 is here shaped to present at least two zones 63-1, 65-1 which, in contact in a position of the closure means 62-1 leaving the opening 60-1 free, are distant in a closed position of the opening 60-1.

For example, in Figure 6, the area 63-1 does not touch the area 65-1 since the closure means 62-1 is in the closed position. In the open position (not shown), these two areas would be in contact with each other.

The same is true for the shutter means 62-2 which comprises two similar zones 63-2 and 65-2.

Here, the closure means 62 essentially comprises a covering body 64-1, here in the form of a sheet, fixed at one end, to a rod 66-1. The covering body 64-1 is for example made of plastic. The covering body 64-1 is preferably flexible with respect to the cross member 66-1. The covering body 64-1 may be of limited thickness. The covering body 64-1 is advantageously airtight. The covering body 64-1 here takes the form of a flexible sheet, the sheet preferably being in one piece. At its end opposite to the rod 66-1, the covering body 64-1 is fixed to a shaft 68-1, connected to a motor 70-1. Thus, the rotation of the motor 70-1 can control the winding of the covering body 64-1 around the shaft 68-1. The shaft 68-1 preferably extends in the vicinity of a first end of the opening 60-1, in the vicinity of the first or of the second turbomachine 28-1, respectively. The shaft 68-1 extends parallel to the direction Y, like the axis A32-1 of the turbomachine 28-1.

The rod 66-1 is slidably mounted on the frame 30-1 of the module 100-1. Here, to do this, a groove is dug in the frame 30-1, on each side of the latter. Each groove receives a lug of the rod 66-1. Advantageously, the covering body 64-1 is also received in these grooves on each side of the frame 30-1.

The rod 66-1 is moreover connected by two cables 72 to a reel 73-1, 74-1, elastically constrained in rotation towards a position of winding of the cables 72 in the reel 73-1, 74- 1 partner. The reels 73-1, 74-1 are preferably arranged in the vicinity of the shaft 68-1, the cables 72 winding on pulleys 75-1 provided each time between the cross member 66-1 and a reel 73-1 , 74-1. Thus, in the position of maximum winding of the cables 72 in the reels 73-1, 74-1, the covering body 64-1, here entirely covers the opening 60-1, as shown in Figure 3.

The motor 70-1 controls the winding of the body covering 64-1 around the shaft 68-1, to leave the opening 60-1 free, against the stress of the winders 73-1, 74-1. In the absence of action from the motor 70-1, the winders 73-1, 74-1 make it possible to wind the cables 72 and to return the body covering 64-1 to its position of closing the opening 60- 1 partner. Intermediate configurations, between the configuration of total closure of the opening 60-1 and the total folding configuration of the body covering 64-1 leaving the opening 60-1 completely free, are possible. These intermediate configurations can be transient, during a transition from one extreme configuration to another, or maintained over time.

As visible in Figure 6, in the closed position, the covering body 64-1, 64-2 forms an angle a1, a2 between 5 ° and 20 °, preferably substantially equal to 12.5 ° with an air inlet surface S2-1, S2-2, normal to the air flow entering the ventilation device 22.

As indicated above, the ventilation device illustrated in Figures 2 and 5 to 8, consists of two modules 100-1, 100-2 of the type described above.

Here, the two modules 100-1, 100-2 are associated so that the frame 30 of the ventilation device 24 consists of a single piece, in one piece, a cross member 61 separating the openings 60-1, 60 -2. In other words, the frames 30-1, 30-2 of the two modules 100-1, 100-2 are here formed by the same single frame 30 of the ventilation device 24, and a cross member 61 separating the two openings 60- 1, 60-2. According to an alternative embodiment, however, the frame 30 of the ventilation device 24 may be formed by frames 30-1, 30-2 of the modules 100-1, 100-2, separate, fixed together.

Here, the two modules 100-1, 100-2 are arranged such that the first and second turbomachines 28-1, 28-2 are mounted parallel to one another, that is to say say that the air flow F1 ejected from the first turbine 32-1 of the first turbine engine 28-1 is distinct from the air flow F2 ejected from the second turbine 32-2 of the second turbine engine 28-2. In other words, the flow of air F1 ejected from the first turbine 32-1 does not pass through the second turbine 32-2 and vice versa.

In this example, the two modules 100-1, 100-2 are arranged such that the axes of rotation A32-1, A32-2 of the turbines 32-1, 32-2 are parallel to the Y direction. The two turbines 32-1, 32-2 are thus mounted horizontally, in this case in a transverse direction Y. Alternatively, the axes of rotation A32-1, A32-2 can be vertical, that is to say parallel. to the Z axis.

As also emerges from the figures, the axis of rotation A32-1 of the turbomachine 28-1 of a first module 100-1, is disposed substantially opposite the upper longitudinal edge 26-1 of the surface S. The axis of rotation A32-2 of the turbomachine 28-2 of the second module 100-2 is disposed substantially opposite the lower longitudinal edge 26-2 of the surface S.

However, depending on the configuration of the heat exchangers and / or the cooling power required for each exchanger, it is possible to position the turbomachines 28-1, 28-2 so as to dedicate them to respective exchangers 26. Other relative positions of turbomachines 28-1, 28-2 are also possible.

According to the embodiment illustrated in Figures 2 and 5 to 8, the outlets 46-1, 46-2 of the turbomachines 28-1, 28-2 of the modules 100-1, 100-2 are arranged opposite the one on the other, oriented substantially in the same direction, but in an opposite direction. This configuration ensures that a first air flow F1 coming from the first turbomachine 28-1 via the associated first outlet 46-1 is substantially in the same direction and in an opposite direction as a second air flow F2 coming from the second turbine engine 28-2 via the associated second outlet 46-2. In this case, the first and second air flows F1 and F2 are substantially vertical.

Each turbine engine 28-1, 28-2 extends along the opening 60-1, 60-2 of the associated module 100-1, 100-2. Each opening 60-1, 60-2 allows at least part of the air flow F having passed through the heat exchanger (s) 26 to exit the cooling module 22 without passing through one of the turbomachines 28-1, 28-2. bypassing the turbomachines 28-1, 28-2 by the air flow F having passed through the exchanger (s) 26 makes it possible to limit the pressure drops of the air flow F, in particular when, for example at high speed of the motor vehicle 10 , the turbomachines 28-1, 28-2 are stopped, the speed of the vehicle 10 sufficient to create an air flow F allowing the cooling of the heat exchanger (s) 26.

However, for example at low speed, it may prove necessary to use one or both turbomachines 28-1, 28-2. It is then useful to guide the flow of air passing through the heat exchanger (s) 26 through the turbine (s) 28-1, 28-2 used. In this case, the openings 60-1, 60-2 can be closed, the closing of the openings 60-1, 60-2 also making it possible to guide the air flow towards the turbomachines 28-1, 28-2. As illustrated in Figure 7, the openings 60-1, 60-2 can be only partially closed.

Furthermore, as illustrated in Figure 8, the openings 60-1, 60-2 of the two modules 100-1, 100-2 can be closed, in whole or in part, independently of one another. In other words, the closure means 62-1, 62-2 of the two modules 100-1, 100-2 are advantageously separate and / or independent. Thus, in FIG. 8, it is in particular possible for the opening 60-1 of a module 100-1 to be closed, totally or partially, while the opening 60-2 of the other module 100-2 is left free, totally or partially.

[0100] In the configuration for closing the openings 60-1, 60-2 by the covering bodies 64-1, 64-2, the covering bodies 64-1, 64-2 make it possible to direct the air flow created towards the turbomachine 28-1, 28-2 of the associated module 100-1, 100-2. On the contrary, the configuration where the covering bodies 64-1, 64-2 leave the openings 60-1, 60-2 of the two modules 100-1, 100-2 completely free, generally achieved while the turbomachines 28-1, 28 -2 are off, allows to direct at least part of the air flow created for example by the speed of the vehicle, on which the cooling module 22 is mounted, through the openings 60-1, 60-2 in the frame 30, without going through the turbomachines 28-1, 28-2. This "diverts" the air flow from the turbomachines 28-1, 28-2. An intermediate configuration can allow part of the air flow to pass through the opening 60-1, 60-2 of a module 100-1, 100-2 of reduced size, another part of the air flow being guided towards the turbomachine 28-1, 28-2 of a module 100-1, 100-2.

FIG. 9 illustrates a second example of a ventilation device 24, in which the two modules 100-1, 100-2 are arranged such that the air outlet 46-1 of the turbomachine 28-1 of a first module 100-1 is arranged opposite the guide portion 42-2 of the turbomachine 28-2 of the second module 100-2. This limits the risks that the air flows F1, F2 from the two turbomachines 28-1, 28-2 interfere with each other.

FIG. 10 illustrates a third example of a ventilation device 24, in which the two modules 100-1, 100-2 are arranged such that the guide portion 42-1 of the turbomachine 28-1 of a first module 100-1 is arranged opposite the guide portion 42-2 of the turbomachine 28-2 of the second module 100-2. Thus, here, the two air outlets 46-1, 46-2 of the two turbomachines 28-1, 28-2 are oriented in opposite directions, such that the risks that the air flows F1, F2 from the two turbomachines 28-1, 28-2 disturb each other. The invention is not limited only to the examples described above. On the contrary, the invention is capable of numerous variants accessible to those skilled in the art.

[0104] In particular, in the example illustrated, the body covering 64-1, 64-2 is in one piece. Alternatively, the covering body can be formed of blades interconnected by articulations of such kind that the blades can be pivoted with respect to each other.

Furthermore, in the example illustrated, the covering body passes from the position of closing the opening 60-1, 60-2 to the position leaving the opening 60-1, 60-2 free, in being wrapped around a tree. Alternatively, the opening body can be retracted or folded up. [0106] Also, in the example illustrated, the ventilation device 24 comprises two modules 100-1, 100-2. Alternatively, the ventilation device 24 can consist of a single module 100-1, 100-2 or more than two modules 100-1, 100-2.

Claims

[Claim 1] Module (100-1; 100-2) of a ventilation device (24) for a cooling module (22) of a motor vehicle (10), comprising:

- at least one, preferably a single, tangential turbomachine (28-1; 28-2) comprising a paddle wheel (32-1; 32-2) and a motor (33-1; 33-2) for driving in rotation of the paddle wheel (32-1; 32-2),

- a frame (30-1; 30-2) forming an opening (60-1; 60-2), preferably single,

- a closure means (62-1; 62-2) adapted to selectively close the opening (60-1; 60-2), the closure means (62-1; 62-2) having at least two zones (63-1, 63-2, 65-1, 65-2) which, in contact in a position of the closure means (62-1; 62-2) leaving free the opening (60-1; 60 -2), are distant in a position of closing the opening (60-1; 60-2).

[Claim 2] A ventilation device module according to claim 1, wherein the sealing means (62-1; 62-2) comprises a covering body (64-1; 64-2) adapted to be wound on it. even around an axis, to leave the opening (60-1; 60-2) free.

[Claim 3] A ventilation device module according to claim 2, comprising a motor (70-1; 70-2) rotating a shaft (68-1; 68-2) fixed to the covering body (64-1; 64). -2), so that the rotation of the motor (70-1; 70-2) wraps the covering body (64-1; 64-2) around the shaft (70-1; 70-2).

[Claim 4] A ventilation device module according to claim 3, further comprising winders (73-1, 74-1; 73-2, 74-2), connected to the covering body (64-1; 64-2). by means of cables (72), the reels (73-1, 74-1; 73-2, 74-2) elastically constraining the covering body (64-1; 64-2) towards the closed position of the opening (60-1; 60-2).

[Claim 5] A ventilation device module according to one of claims 2 to 4, in which the covering body (64-1; 64-2) is guided in movement with respect to the frame (30), in particular the covering body ( 64-1; 64-2) is received in a groove in the frame (30).

[Claim 6] A ventilation device module according to any one of claims 2 to 5, wherein the covering body (64-1; 64-2) is flexible.

[Claim 7] A ventilation device module according to claim 6, in which the covering body (64-1; 64-2) is in one piece, in the form of a flexible sheet, capable of covering the opening (60-1. ; 60-2).

[Claim 8] A ventilation device module according to any one of the preceding claims, in which the tangential turbomachine (28-1; 28-2) comprises an air guide portion (42-1; 42-2) and an air outlet (46-1; 46-2) from the ventilation device module (100-1; 100-2).

[Claim 9] A ventilation device (24) for a motor vehicle cooling module (22) (10), comprising at least one ventilation device module (100-1; 100-2) according to any one of the preceding claims .

[Claim 10] A ventilation device (24) according to claim 9, comprising two ventilation device modules (100-1; 100-2), each ventilation device module (100-1; 100-2) defining an opening. (60-1; 60-2) distinct.

[Claim 11] A ventilation device according to claim 10, wherein the turbomachines (28-1; 28-2) of the two ventilation device modules (100-1; 100-2) are arranged so that the outlet of air (46-1) of the turbomachine (28-1) of a first module (100-1) of the ventilation device is arranged opposite the air outlet (46-2) of the turbomachine (28-2 ) of the second ventilation device module (100-2).

[Claim 12] A ventilation device according to claim 10, wherein the turbomachines (28-1; 28-2) of the two ventilation device modules (100-1; 100-2) are arranged so that the outlet of air (46-1) of the turbomachine (28-1) of a first module (100-1) of the ventilation device is disposed opposite the guide portion (42-2) of the turbomachine (28-2) of the second ventilation device module (100-2).

[Claim 13] A ventilation device according to claim 10, wherein the turbomachines (28-1; 28-2) of the two ventilation device modules (100-1; 100-2) are arranged so that the guide portion (42-1) of the turbomachine (28-1) of a first module (100-1) of the ventilation device is disposed opposite the guide portion (42-2) of the turbomachine (28-2) of the second module (100-2) of the ventilation device.

[Claim 14] Cooling module (22) for a motor vehicle, in particular with an electric motor, comprising: - at least one heat exchanger (26), and

- a ventilation device (24) according to any one of claims 9 to 13, adapted to create an air flow through the at least one heat exchanger (26).