FR3085885A1 - VENTILATION DEVICE FOR A MOTOR VEHICLE - Google Patents

Abstract

The invention relates to a ventilation device (1) intended to generate a flow of air through a heat exchanger (101) of a motor vehicle, comprising at least: - a tangential fan (2) for setting in motion a flow air (F) intended to pass through the heat exchanger (101), - a receiving housing (150) of the tangential fan (2), - a guide means (3) comprising at least one element (5) of shaped air guide to guide the air set in motion by the tangential fan (2) to the heat exchanger (101), - an air line (160) leading to the receiving housing (150) of the fan at a first end (162) of the air line (160), and opening onto the guide means (3) at a second end (164) of the air line (160).

Description

VENTILATION DEVICE FOR A MOTOR VEHICLE

The subject of the invention is a ventilation device for a motor vehicle.

The invention relates to the automotive field, and more particularly to the field of air circulation for cooling the engine and its equipment.

Motor vehicles, whether combustion or electric, need to evacuate 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 frequent that a ventilation device is used in addition, to generate or increase a flow of air directed towards the tubes and the 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 heat exchanger ( circular area of the exchanger facing the fan propeller). The heat exchange therefore does not take place uniformly over the entire surface of the tubes and fins.

In addition, when it is not necessary to start the fan (typically when the heat exchange with unaccelerated ambient air is sufficient to cool the heat transfer fluid circulating in the exchanger), the blades partially obstruct the flow of ambient air to the tubes and the fins, which hinders the circulation of air towards the exchanger and thus limits the heat exchange with the heat transfer fluid.

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

This integration is all the more complicated in an electric vehicle, the front face of which leaves little room for housing the cooling elements of the vehicle.

The object of the invention is to at least partially remedy these drawbacks.

To this end, the subject of the invention is a ventilation device intended to generate an air flow towards a heat exchanger of a motor vehicle, comprising at least:

- a tangential fan for setting in motion an air flow intended for the heat exchanger, and

- a guide means comprising at least one shaped air guide element for guiding the air set in motion by the tangential fan towards the heat exchanger.

Thus, the ventilation device according to the present invention being devoid of propeller, it has a reduced size, which ensures simple integration in any motor vehicle, including electric.

In addition, thanks to the tangential fan and the guide means, the ventilation device according to the present invention guarantees a more uniform and efficient cooling of the heat exchanger or the heat exchangers with which it is associated.

The tangential fan can also be called a tangential turbomachine.

According to another characteristic of the invention, the device comprises at least one air deflector configured to be disposed between said at least one guide element and the heat exchanger.

According to another characteristic of the invention, the device comprises a plurality of aligned air deflectors and preferably equidistant from each other.

According to another characteristic of the invention, the device comprises a plurality of air guiding elements.

According to another characteristic of the invention, the air guide elements are shaped to delimit at least one air passage in the heat exchanger and are mounted movable between an open position of said air passage and a at least partially closed position of said air passage.

The device can thus make it possible not to block the flow of ambient air towards the heat exchanger when the ventilation device is switched off, unlike a propeller whose stationary blades and the motor in the center of the propeller obstruct the passage of air to the exchanger, and thus limit the heat exchange.

According to another characteristic of the invention, each air guide element comprises an air guide surface and a pivot axis of the guide element.

According to another characteristic of the invention, the pivot axes extend parallel to each other, projections of each pivot axis in a plane orthogonal to the pivot axes being called projection.

According to another characteristic of the invention, the projections are aligned in said plane orthogonal to the pivot axes.

According to another characteristic of the invention, the device comprises at least first and second tangential fans on either side of the guide elements, the tangential fans extending parallel to the guide elements, a total section of the elements of guide having a middle direction parallel to the guide elements so as to delimit a first half section between the first fan and the middle direction and a second half section between the second fan and the middle direction, the guide elements being shaped so that 'A distance between the heat exchanger and a projection is less than a distance between the heat exchanger and the adjacent projection, located in the same half section and being closer to the associated turbomachine.

According to another characteristic of the invention, the device comprises a single fixed guide element.

According to another characteristic of the invention, the device comprises an air inlet associated with each turbomachine, the inlet or inlets forming unique air inlets of the ventilation device.

According to another characteristic of the invention, at least one of said air inlets is provided with at least one movable flap between an opening position of the inlet and an at least partial closed position of the inlet .

According to another characteristic of the invention, the at least one tangential fan is shaped to extend along an opening of a grille of the motor vehicle.

According to another characteristic of the invention, the at least one tangential fan is shaped to occupy the entire volume of the opening of the grille.

According to another characteristic of the invention, a part for bringing an external air flow to the turbomachine can be used.

According to another characteristic of the invention, a second guide means comprising at least one element for guiding air towards a second heat exchanger of the motor vehicle can be used.

According to another characteristic of the invention, the two guide means are supplied by the same tangential fan.

According to another characteristic of the invention, each of the guide means comprises a plurality of air guide elements, each guide element comprising an air guide surface and a pivot axis of the guide element, the pivot axes extending parallel to each other, the assembly of the two guide means having planar symmetry.

The invention also relates to a ventilation device intended to generate an air flow through a heat exchanger of a motor vehicle, comprising at least:

- a tangential fan for setting in motion an air flow intended to pass through the heat exchanger,

- a housing for receiving the tangential fan,

a guide means comprising at least one shaped air guide element for guiding the air set in motion by the tangential fan towards the heat exchanger,

- an air line opening onto the fan receiving housing at a first end of the air line, and opening onto the guide means at a second end of the air line (160).

Thus, the ventilation device according to the present invention being devoid of propeller, it has a reduced size, which ensures simple integration in any motor vehicle, including electric.

In addition, by virtue of the air line making it possible to make the connection between the housing for receiving the fan and the guide means, the tangential fan can be offset relative to the guide means, thus making it possible to place the tangential fan in a more favorable environment (less space requirement, for example under the sides of the vehicle, at the wheel arches, or other) than that where the guide means is located (generally on the front of the vehicle facing -vis of the heat exchanger (s) to be cooled, very constrained in size by the presence of several exchangers and of the front panel cross member in particular).

In addition, the tangential fan can be positioned in various orientations (vertical, horizontal, bias) which offers greater ease of integration into the vehicle environment, the air duct ensuring the air connection between the tangential fan and the guide means.

By moving the tangential fan, it is possible on the one hand to modify the geometry of the distributor, for example to make it more compact. Indeed, the depth of the distributor is closely linked to the outlet section of the volute and therefore to the diameter of the tangential helix. With a remote tangential fan this constraint is overcome.

Furthermore, when the environment of the receiving housing allows it, it is possible to modify the diameter of the tangential fan, by reducing or increasing it in order to achieve better yields.

By moving the tangential fan, reducing space and volume constraints, it is then possible to change the turbomachine technology used. An axial or centrifugal turbomachine can therefore be used as a tangential fan.

In addition, it is thus possible to integrate the ventilation device around the front cross member. Another advantage of this integration is that the dead zone behind the cross-member is now optimized with a uniform blowing via the air line and the guide means.

In addition, thanks to the tangential fan and the guide means, the ventilation device according to the present invention guarantees a more uniform and efficient cooling of the heat exchanger or the heat exchangers with which it is associated.

Advantageously, the ventilation device comprises a plurality of air guiding elements.

In addition, the air guide elements can be shaped to define at least one air passage between the tangential fan and the heat exchanger, and are mounted movable between an open position of said at least one passage. air and an at least partial sealing position of said at least one air passage.

Advantageously, each air guide element comprises an air guide surface and a pivot axis of the guide element.

Advantageously, the tangential fan is arranged in the receiving housing so that its axis of rotation is transverse to the pivot axis.

According to another embodiment of the invention, the ventilation device comprises a single fixed guide element.

Advantageously, the device comprising at least one air inlet associated with the housing for receiving the tangential fan, the inlet or entrances forming single air inlets of the ventilation device.

In addition, at least one of said air inlets is provided with at least one movable flap between an opening position of the inlet and an at least partial closed position of the inlet.

In addition, the at least one tangential fan can be configured to extend along an opening of a grille of the motor vehicle.

The invention also relates to a heat exchange module, comprising a ventilation device as described above and at least a first heat exchanger, the first heat exchanger and the ventilation device being positioned one relative to the 'other so that an air flow set in motion by the ventilation device supplies air to the heat exchanger.

According to another characteristic of the invention, the module further comprises a second heat exchanger, mounted opposite the first heat exchanger, the ventilation device being positioned so that an air flow brought into movement by the ventilation device feeds the first heat exchanger and the second heat exchanger.

According to another characteristic of the invention, the ventilation device is positioned between the first heat exchanger and the second heat exchanger.

The invention also relates to a radiator grille for a motor vehicle, provided with an opening and a ventilation device as described above and / or a heat exchange module as described above.

Other characteristics and advantages of the invention will appear on reading the description which follows. This is purely illustrative and should be read in conjunction with the accompanying drawings in which:

- Figure 1 illustrates a perspective view of a heat exchange module equipped with a ventilation device according to a first embodiment of the present invention in the open position;

- Figure 2 illustrates a perspective view of the heat exchange module of Figure 1 in the closed position;

- Figure 3 illustrates a longitudinal sectional view of the module of Figure 1;

- Figure 4 illustrates a longitudinal sectional view of the module of Figure 2;

- Figure 5 illustrates a perspective view of a front face of a motor vehicle equipped with the module of Figure 1;

- Figure 6 illustrates a perspective view of a front face of a motor vehicle equipped with the module of Figure 2;

- Figure 7 illustrates a side view of the front face of Figure 5;

- Figure 8 illustrates a top view of the front face of Figure 6;

- Figure 9 illustrates a partial perspective view of the module of Figure 1 according to an alternative embodiment, a guide means not being shown;

- Figure 10 illustrates a longitudinal sectional view of the module of Figure 9;

- Figure 11 illustrates a partial perspective view of a heat exchange module equipped with a ventilation device according to a second embodiment of the present invention in the open position;

- Figure 12 illustrates a partial perspective view of the module of Figure 11 in the closed position;

- Figure 13 illustrates a perspective view of a front face of a motor vehicle provided with an exchange module equipped with a ventilation device according to a third embodiment of the present invention;

- Figure 14 illustrates a side view of the front face of Figure 13;

- Figure 15 illustrates a perspective view of an example of a front end of a motor vehicle equipped with a ventilation device provided with an air duct between the tangential fan and the guide means;

- Figure 16 illustrates a top view of the front face of the figure;

- Figure 17 illustrates a perspective view of another example of the front face of a motor vehicle equipped with a ventilation device provided with an air duct between the tangential fan and the guide means; and

- Figure 18 illustrates a top view of the front face of the figure

17.

Ventilation device

The subject of the invention is a ventilation device 1 for a motor vehicle.

The invention also relates to a heat exchange module 100, comprising at least one ventilation device 1 and at least one heat exchanger 101, as will be detailed later.

As shown in the figures, the ventilation device 1 comprises at least one tangential fan, also called tangential turbomachine below, referenced 2, for setting in motion an air flow F intended for the heat exchanger or heat exchangers . In fact, the ventilation device can supply air to the heat exchanger 101 but also to several heat exchangers arranged one behind the other, or one next to the other.

The ventilation device 1 also includes a means 3 for guiding the air F into each of the heat exchangers to be cooled.

First embodiment

According to the first embodiment, illustrated in Figures 1 to 8, the ventilation device 1 comprises a single guide means 3 for guiding the air to at least one heat exchanger 101.

The guide means 3 comprises a set of a plurality of guide elements 5.

As is particularly apparent from FIGS. 1 to 4, each guide element 5 comprises an air guide surface 6 in the form of a panel and a pivot axis 7 of the guide element 5.

The panel 6 has a substantially rectangular shape.

The pivot axis 7 comprises two fingers 8, 9, aligned, each of the fingers 8, 9 projecting from the panel 6 in a longitudinal direction of the panel 6.

The guide elements 5 are mounted parallel to each other, and parallel to a median direction called pivoting, denoted M.

As also appears from FIGS. 1 and 2, the ventilation device 1 comprises a frame 10.

The frame 10 has a substantially rectangular shape.

The frame 10 comprises two bars 11 for supporting the fingers 8 and the fingers 9 of the guide elements 5 respectively.

Bars 11 extend parallel to each other and orthogonally to direction M.

The bars 11 form lengths of the rectangle 10.

The frame 10 also includes two bars 12-1, 12-2 for supporting compartments 13.

Bars 12-1, 12-2 extend parallel to each other, and parallel to the direction M.

Bars 12-1, 12-2 form widths of rectangle 10.

As shown in Figures 1 and 2, each bar 12-1, 12-2 supports two compartments 13 extending in extension of one another.

Each compartment 13 is configured to accommodate a tangential turbomachine 2, or at least the tangential turbine of the turbomachine, the drive motor of the turbine possibly being common with a turbine of an adjacent compartment.

Two parts of the guide means 3 can be defined.

A first part 3-1 comprises the guide elements 5 arranged between the first bar 12-1 and the central pivoting direction M and a second part 3-2 comprises the guide elements 5 arranged between the second bar 12-2 and the middle pivot direction M.

As more particularly visible in FIGS. 3 and 4, the fingers 8 (respectively 9) are not aligned.

Their projections 8 '(respectively 9') in a plane, noted O, orthogonal to the axis M, form a V.

The plane O substantially coincides with the plane formed by the support bar 11.

In other words, the guide elements are positioned between the support bars 11 so that a distance D1 between the heat exchanger 101 and a given projection 8 '(9') is less than a distance D2 between the heat exchanger 101 and the adjacent projection 8 ”, located in the same half of section 3-1, being closer to the associated tangential turbomachine.

This configuration ensures optimal air guidance since the air flow converges from the tangential turbomachine 2 to the heat exchanger 101.

However, according to another variant, the projections can be aligned along the bars 11.

This variant, which is less advantageous for the air flow, can possibly simplify the manufacturing process of the ventilation device 1.

The frame 10 defines an internal space forming the air inlet intended for the heat exchanger 101. Within this internal space, the guide elements delimit air passages E towards the heat exchanger 101.

The guide elements are mounted movable between an open position of the air passage E and an at least partially closed position of the air passage E.

In the open position, the panels are spaced from one another so as to allow an air flow F ′ outside to pass through the exchange module to the heat exchanger 101.

In the closed position, otherwise called the closed position, the panels 6 extend in line with one another so as to prevent the flow of air F ′ from passing through the heat exchanger 101.

In this position, the panels 6 are advantageously contiguous to each other thanks to a lip arranged along their edge.

According to another possible intermediate position (not shown in the figures), the guide elements partially block the air passage E, which makes it possible to reduce the air flow to the heat exchanger 101, for example when the needs of the heat exchanger 101 is not high.

As can be seen in FIG. 3, in the open position, the flow F ′, outside the vehicle passes through the ventilation device 1 as far as the heat exchanger 101.

The turbomachines 2 are preferably stopped.

As can be seen in FIG. 4, in the closed position the panels 6 block the passage of air E to the air flow F ’.

The turbomachines then operate and blow the air flow F which is then guided by the guide elements 5 into the heat exchanger 101.

Due to the converging shape of the guide means 3, the air is optimally supplied to the heat exchanger 101.

Figures 5 to 8 illustrate an example of integration of the ventilation device 1 in a front face 20 of a motor vehicle.

As can be seen in these figures, a grille 21 is provided with two orifices 22, forming an air intake opening F ’.

The ventilation device 1 is positioned behind the orifices 22.

In these figures, the ventilation device 1 conforms to the ventilation device 1 already described in relation to Figures 1 to 4.

Variant of embodiment of the invention

According to the variant of Figures 9 and 10, the ventilation device 1 comprises a guide means 3 as illustrated in Figures 1 to 4 (not shown in Figures 9 and 10 for reasons of clarity, the latter being a view partial of the module of FIG. 1), a frame 10, of the tangential turbomachines 2 in a configuration similar to that of the first embodiment.

The ventilation device 1 additionally comprises at least one deflector between the guide means 3 (not shown) and the heat exchanger 101.

The deflector or deflectors ensure a better distribution of the air on the heat exchanger 101, allowing a more homogeneous distribution of the air flow F in the heat exchanger 101.

In FIGS. 9 and 10, the ventilation device 1 comprises a plurality of deflectors 30.

Each deflector 30 is a rod whose cross section is curved so as to guide the air.

The deflectors 30 are aligned along the support bars 11, preferably equidistant from each other, as more particularly visible in FIG. 10.

In the open position, the air F blown by the turbomachines 2 is guided towards the exchanger 101 by the guide means 3 then by the deflectors 30.

It should be noted that the device 1 according to this alternative embodiment makes it possible to better homogenize the air intended for the heat exchangers 101 by means of the deflectors.

It is also noted that in FIG. 9 a plurality of orifices 31 has been shown, each orifice 31 being intended to receive a finger 9 ’of the guide elements 5.

Second embodiment

According to the second embodiment illustrated in Figures 11 and 12, the ventilation device 1 comprises two guide means 3 ’, 3”.

The first guide means 3 ’directs the air to a first heat exchanger 101, while the second guide means 3’ directs the air to a second heat exchanger 102.

As shown in Figures 11 and 12, the ventilation device 1 is disposed between the two exchangers 101,102 extending in parallel.

Each of the guide means 3 ’, 3” includes guide elements identical to those described in relation to the first embodiment.

As is apparent from FIGS. 11 and 12, the pivot axes 7 of the two guide means 3 extend parallel to the central pivot direction M.

The set of two guide means 3 ’, 3” has a symmetry with respect to a PP plane.

The PP plane includes a direction parallel to the middle direction M.

The device 1 is also identical to that described in relation to the first embodiment.

As shown in FIGS. 11 and 12, the two guide means 3 ’, 3” are supplied by the same turbomachines 2.

It is noted that the device 1 according to this second embodiment can also advantageously include deflectors 30 (not shown in FIGS. 11 and 12) between each of the guide means 3 'and 3 ”and the first and second exchangers 101, 102 respectively. to better homogenize the air intended for heat exchangers 101 and 102.

Third embodiment

According to a third embodiment, the ventilation device 1 comprises a single guide means 3 comprising a single guide element 5.

As shown in Figures 13 and 14, the guide element 5 is in the form of a cover.

The illustrated ventilation device 1 also comprises at least one tangential turbomachine, or even two tangential turbomachines as shown in FIG. 13, extending in line with one another.

This embodiment is particularly advantageous for an electric vehicle.

In this case, as can be seen from FIG. 13, a calender 40 is pierced with an orifice 41 forming an air opening.

The two turbomachines 2 are arranged just behind the orifice 41 so that the orifice 41 forms the single air inlet for the ventilation device 1.

Advantageously, the two turbomachines 2 occupy the entire volume of the air intake from the radiator grille.

It is noted that the device 1 according to this third embodiment may also advantageously include deflectors 30 (not shown in FIGS. 13 and 14) to better homogenize the air intended for the heat exchanger 101.

According to a variant not illustrated, the at least one tangential turbomachine 2 is positioned at a distance from the air inlet 41.

In this case, an additional part makes it possible to convey air from port 41 to the turbomachine (s) 2.

It is advantageously possible to provide at least one of the air inlets 41 with at least one movable flap between an opening position of the inlet and an at least partial closing position of the inlet.

Exchange module

The invention also relates to a heat exchange module 100 for a motor vehicle comprising the ventilation device 1 and at least one heat exchanger 101, the ventilation device and the heat exchanger being positioned one relatively to the other so that a flow of air set in motion by the ventilation device supplies air to the heat exchanger, as is already apparent from the description above.

According to an alternative embodiment of the module, the ventilation device 1 is positioned so that a flow of air F set in motion by the ventilation device feeds the first heat exchanger 101 and the second heat exchanger 102.

The ventilation device 1 can in particular be positioned between the first heat exchanger 101 and the second heat exchanger 102 so as to supply each of the exchangers 101, 102 with fresh air.

Fourth embodiment

Reference is made to FIGS. 15 which illustrates a perspective view of an example of the front face of a motor vehicle equipped with a ventilation device 1 provided with an air duct 160 between the tangential fan 2 and the guide means 3 .

In this exemplary embodiment, the ventilation device 1 comprises at least:

the tangential fan 2 for setting in motion an air flow F intended to pass through the heat exchanger 101,

a housing 150 for receiving the tangential fan 2,

the guide means 3 comprising at least one element 5 for guiding the air shaped to guide the air set in motion by the tangential fan 2 through the heat exchanger 101,

- An air line 160 opening onto the housing 150 for receiving the fan at a first end 162 of the air line 160, and opening onto the guide means 3 at a second end 164 of the air line 160.

The tangential fan 2 can in particular be arranged in the receiving housing 150 so that its axis of rotation is transverse to the pivot axis 7 as illustrated in FIGS. 15 and 16.

In addition, the ventilation device 1 can comprise at least one air inlet associated with the receiving housing 150 (not shown in the figures) of the tangential fan, the inlet or inlets forming single air inlets of the ventilation device 1.

According to one embodiment, at least one of said air inlets is provided with at least one movable flap between an opening position of the inlet and an at least partial closed position of the inlet.

In the embodiment illustrated in Figures 15 and 16, the receiving housings 150 are shaped to receive the tangential fans 2 in a horizontal position relative to the direction of advance of the vehicle in operation.

However, according to other possible embodiments, the receiving housings 150 can be shaped to receive the tangential fans 2 in the biased position or in the vertical position as illustrated in FIGS. 17 and 18.

Thus, thanks to the air line 160, it is possible to establish an air junction between the receiving housing 150 of the fan 2 and the guide means 3, allowing the tangential fan 2 to be offset relative to the means of guidance 3. As a result, it is possible to place the tangential fan in a more favorable environment (less space constraints, for example under on the sides of the vehicle, at the wheel arches, or opening the grille for example (see FIG. 16)) than that in which the guide means 3 is located (generally on the front face of the vehicle facing the heat exchanger (s) 101 to be cooled, very constrained in size by the presence of several exchangers and the front face cross member in particular).

Furthermore, when the environment of the receiving housing allows it, it is possible to modify the diameter of the tangential fan 2, by reducing or increasing it in order to achieve better yields.

By moving the tangential fan, reducing space and volume constraints, it is then possible to change the turbomachine technology used. An axial or centrifugal turbomachine can then be used as a tangential fan.

In addition, it is thus possible to integrate the ventilation device around the front cross member. Another advantage of this integration is that the dead zone behind the cross-member is now optimized with a uniform blowing via the air line and the guide means.

The invention is not limited to the embodiments presented and other embodiments will be apparent to those skilled in the art. In particular, the different examples can be combined, as long as they are not contradictory.

Furthermore, the embodiments shown in the figures illustrate elements of vertical air guides with a tangential turbomachine mounted laterally. However, other configurations of ventilation device can be envisaged, such as an embodiment according to which the air guide elements are horizontal, the turbomachine (s) then being positioned below and / or above the elements of guides.

In addition, the ventilation device can be integrated in an electric vehicle as well as a thermal or hybrid vehicle. In this way it will be understood that the exchangers cooled by the ventilation device described above can be any type of motor vehicle heat exchanger, such as a high temperature and / or low temperature heat exchanger, a condenser, an exchanger for charge air cooling, etc. The heat exchange module can likewise include any heat exchanger of this type.

Claims (10)

1. Ventilation device (1) intended to generate a flow of air through a heat exchanger (101) of a motor vehicle, comprising at least: - a tangential fan (2) for setting in motion an air flow (F) intended to pass through the heat exchanger (101), - a receiving housing (150) of the tangential fan (2), - a guide means (3) comprising at least one element (5) for guiding the air shaped to guide the air set in motion by the tangential fan (2) towards the heat exchanger (101), - an air line (160) opening onto the receiving housing (150) of the fan at a first end (162) of the air line (160), and opening onto the guide means (3) at a second end (164) of the air line (160). 2. Device according to the preceding claim, comprising a plurality of air guide elements (5). 3. Device according to the preceding claim, wherein the air guide elements (5) are shaped to define at least one air passage (E) between the tangential fan (2) and the heat exchanger (101) , and are mounted movable between an open position of said at least one air passage (E) and a closed position (E) at least partial of said at least one air passage. 4. Device according to the preceding claim, wherein each air guide element (5) comprises an air guide surface (6) and a pivot axis (7) of the guide element (5). 5. Device according to the preceding claim, wherein the tangential fan (2) is arranged in the receiving housing so that its axis of rotation is transverse to the pivot axis (7). 6. Device according to claim 1, comprising a single fixed guide element (5). 7. Device according to any one of the preceding claims, comprising at least one air inlet associated with the receiving housing (150) of the tangential fan, the inlet or inlets forming single air inlets of the ventilation device (1). 8. Device according to the preceding claim, wherein at least one of said air inlets is provided with at least one movable flap between an open position of the inlet and an at least partially closed position of the Entrance. 9. Device according to one of claims 7 or 8, wherein the at least one tangential fan (2) is shaped to extend along an opening (41) of a grille (40) of the motor vehicle . 10. Heat exchange module comprising a ventilation device according to one of the preceding claims and at least a first heat exchanger (101), the first heat exchanger and the ventilation device being positioned one relative to the other so that an air flow (F) set in motion by the ventilation device supplies air to the heat exchanger (101).