FR3136405A1 - Ventilation device for a motor vehicle, ventilation assembly and corresponding motor vehicle - Google Patents

Abstract

Ventilation device for a motor vehicle, ventilation assembly and corresponding motor vehicle Ventilation device (100) comprising a vent (110) for diffusing air towards a vehicle passenger compartment (1). The mouth (110) comprises an air outlet (111), forming a slot of width (lF111) less than 10 mm, supplied by three superimposed channels (113, 115, 117) extending over a length (LC) d 'at least 100 mm, a distal end of the channels (113, 115, 117), distant from the air outlet (111), cooperating with selective closing means (200) of the channels (113, 115, 117) and a proximal end of the channels (113, 115, 117), in the mouth (110), comprising fixed means for directing the air circulating in each of the channels (113, 115, 117) towards the outlet slot d air (111). Abstract figure: [Fig.4]

Description

Ventilation device for a motor vehicle, ventilation assembly and corresponding motor vehicle 1. Field of the invention

The field of the invention is that of ventilation and/or air conditioning devices for a means of transporting passengers, in particular a motor vehicle.

In particular, the invention relates to the improvement of such a device in terms of the air outlet towards the habitable space.

2. Prior art

The presence of means of ventilation and/or air conditioning inside the interior of a means of transport, such as a motor vehicle, is well known. Generally, the air is previously treated by a treatment system ensuring, depending in particular on instructions determined by the occupant(s) of the means of transport, the filtering, thermal management and/or hygrometric management of the air to be distributed. .

The treated air is then routed to diffusion vents in the passenger compartment, or air outlets, particularly on the dashboard, via an air propulsion system. The propulsion system, typically a blower, routes the treated air in the form of a large flow into the air ventilation device(s). These air outlets are equipped with movable means to direct the air flow in the passenger compartment, for example towards the face or towards the legs, depending on the occupants' preferences.

To do this, each air outlet opening into the passenger compartment is equipped with mobile means for directing air, for example in the form of an adjustable nozzle each movably mounted, by a ball joint, on an outlet opening air, or equipped with movable slats or shutters allowing the air to be directed upwards or downwards. Although such nozzles allow occupants precise adjustments to the direction of air flows, they harm the visual comfort of these same occupants.

In vehicles in particular, the design and interior presentation of the cabin is an important aspect, and many efforts are made to give air ventilation devices in particular, and dashboards more generally, an attractive visual appearance. . However, these developments are constrained by the implementation of air outlets and their mobile elements.

Furthermore, the different air outlets are essentially punctual, and define zones delivering a generally significant flow of air, and sometimes annoying for the user, while other zones are not or barely reached by the flow of air. air delivered.

In addition, the presence of moving elements, for example movable slats or shutters, introduce flow disturbances, which induce turbulence in the air flows. This results in particular in noise pollution, which varies depending on the position of the moving elements, and in potentially uncomfortable flows delivered.

There is therefore a need to provide a new ventilation technique making it possible to overcome all or part of the disadvantages of known solutions.

There is thus a need to provide such an efficient and durable ventilation device technique, comfortable and simple to use for the user, and easy to implement for the vehicle designer, while allowing the latter, if necessary, to offer new designs for dashboards.

3. Summary of the invention

The proposed technique relates, according to a first aspect, to a ventilation device for a motor vehicle comprising a vent for diffusing air towards the passenger compartment of said vehicle.

According to the invention, the diffusion mouth comprises an air outlet forming a slot with a width of less than 10 mm and is supplied by three superimposed channels extending over a length of at least 100 mm, a distal end of the channels, distant from the air outlet, cooperating with means for selectively closing the channels and a proximal end of the channels, in the diffusion mouth, comprising fixed means for directing the air circulating in each of the channels towards the slot air outlet.

Such an arrangement of ventilation device makes it possible, while dispensing with mobile means of directing air at the level of its air outlet, to ensure efficient and precise distribution of an air flow oriented towards the interior of the vehicle.

The absence of mobile means for directing air at the air outlet also makes it possible to reduce the bulk of the ventilation device. The air outlet is compact in height, i.e. in the form of a slot of maximum 10 mm, so as to allow simple and discreet integration into the vehicle. Such a slot shape also allows the air outlet to be adapted to the design of the vehicle in which the device is intended to be placed. For example, the slot can extend over a relatively long length of the dashboard and/or adapt to curved portions thereof, which would not be possible with movable shutters for example. This can therefore result in an improvement in the aesthetics of the vehicle and, a fortiori , visual comfort for its occupants.

Furthermore, the absence of mobile means, the selection of one or more channels being carried out upstream, allows on the one hand to develop air outlets of original shape and adapted to the vehicle, with discreet and original integration, and on the other hand to deliver undisturbed air flows, without (or with very little) turbulence, since the channels are fixed, without elements, and in particular without moving parts, likely to generate such disturbances. According to the approach of the invention, the elements for closing or opening all or part of the channels are in fact offset from the proximal ends (close to the air outlet) to the distal ends of the channels, which allows keep away elements likely to cause noise pollution (turbulence in air flows, slamming of shutters when moving, etc.) for the occupants of the vehicle.

The implementation of three superimposed channels, opening into the air outlet, makes it possible to simply and effectively direct the air flow, depending on the channel(s) selected.

The length of the channels, of at least 100 mm, ensures that these mobile means are sufficiently far apart, both with regard to noise and turbulence, the air being guided without constraint other than that defined by the edges of each channel.

This approach also makes it possible, compared to known solutions, to reduce the pressure of the air circulating in the device, here in the channels, which also contributes to reducing noise and turbulence.

Thus, according to a particular characteristic, the channels are defined by an upper wall, a lower wall and two intermediate walls, substantially parallel over most of the length of the channels, with the exception of the proximal end.

Such a configuration makes it possible in particular to ensure homogeneity of air flows over the entire length of the channels. This therefore makes it possible to reduce, or even eliminate, noise disturbances linked to turbulence.

According to another particular characteristic, at least one of the intermediate walls has, at the level of the proximal end, at least one boss adapted to guide the air circulating in the corresponding channel towards the air outlet.

Such a configuration makes it possible to define a robust and effective means, producing a “Coandă” effect of guiding and directing the air flow(s) circulating in the selected channel(s) towards the outlet slot, and then into the passenger compartment. .

More precisely, the intermediate walls can have a boss on each of their upper and lower faces, and end in a point oriented towards the air outlet.

By allowing each air circulation channel to benefit from the “Coandă” effect, we obtain in particular precise diffusion of the secondary air flow formed by all or part of the air circulating in the channels.

The particular shape of these bosses is adapted according to the needs, and in particular the slot and the orientation of the air flow desired in the passenger compartment, and so as to avoid, or at the very least reduce, disturbances, regardless of the channel(s) selected.

According to another particular characteristic, the upper wall and the lower wall have an inclined end portion, connecting the upper, respectively lower, wall of the diffusion mouth to the air outlet, and defining the air outlet.

In other words, the air outlet is defined by a convergence of the channels substantially opposite the central channel. This notably allows effective diffusion of the air flow from the device into the vehicle. Obviously, this particularity of this overall structure is adaptable depending on the type of vehicle (truck, bus).

According to another particular characteristic, the diffusion mouth gradually widens towards the air outlet.

Such flaring of the air outlet makes it possible in particular to reduce the air pressure. This also makes it possible to simply and effectively adapt the air outlet to the design constraints of the vehicle, the outlet slot being able to extend over several tens of centimeters.

The invention relates, according to a second aspect, to a ventilation assembly for a motor vehicle comprising a plurality of such ventilation devices.

According to a particular characteristic, at least two air outlets are aligned side by side so as to form a wide ventilation zone on a dashboard of the vehicle.

Such an arrangement allows in particular a simple adaptation of the air outlets to the design constraints of the vehicle, making it possible to offer new and original designs, and also allowing efficient and comfortable ventilation of its passenger compartment.

According to another particular characteristic, at least one of the ventilation devices has a curved outlet, substantially following a curve of the dashboard of the vehicle.

Such an arrangement, enabled by the innovative structure of the devices, notably allows simple adaptation of the air outlet to vehicle design constraints, for example at the level of a central console, or at one end of the dashboard. .

According to another particular characteristic, the ventilation assembly comprises a control unit, capable of controlling the blocking or opening of the channels of the ventilation devices globally, independently and/or by subassemblies.

Such a control unit makes it possible to ensure efficient and personalized management of the vehicle's ventilation devices according to the preferences of each occupant.

The proposed technique relates, according to a third aspect, to a motor vehicle implementing at least one such ventilation device and/or at least one such ventilation assembly.

4. List of Figures

The proposed technique, as well as the various advantages it presents, will be more easily understood, in the light of the description which follows of an illustrative and non-limiting embodiment thereof, and the appended drawings including:

: there illustrates, in a partial elevated perspective view, an example of a passenger compartment of a motor vehicle equipped with a dashboard incorporating ventilation devices having fixed means for directing the air circulating in channels towards an outlet air, in accordance with the proposed technique;

: there illustrates, in a partial perspective view, the dashboard of the ;

: there is an exploded view of the dashboard of the highlighting the ventilation assemblies;

: there illustrates, in a cross-sectional view of the dashboard of the , a ventilation device;

: there is a partial view of the highlighting fixed means of directing the air;

, And : Figures 6A to 6C illustrate, in different views, the ventilation assemblies of the ; And

, , , , , , , , , , And : Figures 7A to 13 illustrate, in different views, configurations of a ventilation device, conforming to the proposed technique, distributing a secondary air flow in various orientations, namely:

• in the figures And , towards the legs of a passenger;
• in the figures And , towards the stomach of a passenger;
• in the figures And , towards the face of a passenger;
• in the figures And , towards the thorax of a passenger;
• in the figures And , in diffusion towards the torso of a passenger;
• in the figures And , according to other directions.

5. Detailed description of the invention

5.1. General principle

At the cost of an innovative approach and non-obvious adaptations of ventilation devices, the inventors of the present technique have determined that, contrary to the preconceptions of those skilled in the art, it is possible to guarantee effective and precise control of the orientation of the air towards a passenger compartment, in particular of a motor vehicle, by dispensing with mobile orientation means arranged at the level of the air outlet of the diffusion mouth.

The general principle of the invention therefore consists of a diffusion mouth comprising an air outlet forming a slot with a width of less than 10 mm and supplied by three superimposed channels extending over a length of at least 100 mm, one end distal end of the channels, distant from the air outlet, cooperating with means for selectively closing the channels and a proximal end of the channels, in the diffusion mouth, comprising fixed, or static, means for directing the air circulating in each of the channels towards the air outlet slot.

It thus appears that the air diffusion mouth is devoid, at its air outlet, of mobile air orientation means necessary according to the previous solutions, controlling the orientation of the air circulating at the inside the channels of the ventilation device, and more generally of any air guiding element likely to extend between the outlet of the channels and the air outlet slot.

Offsetting the means of closing the channels, at the level of the distal ends thereof, by providing long air supply channels, makes it possible in particular to limit the size of the air outlet, and therefore to offer a new and attractive visual of the ventilation system, and to reduce, or at least effectively reduce, turbulence and possible noise.

The proposed technique relates, according to a second aspect, to a ventilation assembly for a motor vehicle comprising a plurality of such ventilation devices and, according to a third aspect, to a motor vehicle comprising such a ventilation device and/or such an assembly ventilation.

5.2. Description of an embodiment

We subsequently illustrate an embodiment of the proposed technique, treated as a simple illustrative example, and not limiting, in support of Figures 1 to 7G making direct or indirect reference to an air ventilation device for a vehicle. automobile.

However, as will become clear later, the proposed technique is not limited to this implementation and can, subject to adaptation of the shapes and dimensions in particular, find applications to other types of dashboards. , and more generally to other applications in a motor vehicle, in particular to an installation in the rear seats of the vehicle, or even to applications to other means of passenger transport.

Subsequently, the same elements were designated by the same references in the different figures.

5.2.1 Structural description

There illustrates an example of a passenger compartment of a motor vehicle equipped with a dashboard incorporating such ventilation assemblies. Figures 2 and 3 illustrate, according to different views of the dashboard in question, an example of positioning of such ventilation assemblies, giving the impression of a single slot facing the passenger on the one hand, and the driver on the other. on the other hand, while taking into account stylistic and technical constraints, such as the presence of the dashboard and the steering wheel.

Figures 4 and 5 illustrate, from different views, the internal structural aspects of a ventilation device conforming to the proposed technique. Figures 6A to 6C illustrate, in different views, the isolated ventilation assemblies.

We first describe, in relation to Figures 1 to 6C, the structural aspects of an example of a ventilation device for a motor vehicle conforming to the proposed technique, then the structural aspects of the ventilation assemblies each formed of a plurality of such ventilation devices.

The automobile vehicle 1 conventionally comprises an interior passenger compartment presenting, at the front of the vehicle, a dashboard 11 supporting in particular, in front of the driver, a steering wheel and a plurality of actuators, indicators and indicators (not represented).

In addition, one or more (in particular two, one for each passenger) ventilation assemblies 10, 10', 10" are provided, each formed of a plurality of ventilation devices 100. Obviously, such ventilation devices or assemblies can be provided in other locations in the vehicle passenger compartment, in particular to distribute air to the rear passengers.

The aspects of a single ventilation device will be described below, for reasons of clarity and conciseness in particular. These aspects nevertheless apply to each ventilation device.

According to the technique of the invention, the diffusion mouth 110 of the ventilation device 100 comprises an air outlet 111, forming a slot, of width l _F111 less than 10 mm. It is supplied by three superimposed channels 113, 115, 117 extending over a length L _C of at least 100 mm. In other words, the proximal ends EP ₁₁₃ , EP ₁₁₅ , EP ₁₁₇ of the three superimposed channels 113, 115, 117 open onto a fine air outlet 111.

In addition, each channel 113, 115, 117 has a distal end ED ₁₁₃ , ED ₁₁₅ , ED ₁₁₇ , distant from the air outlet 111, and a proximal end EP ₁₁₃ , EP ₁₁₅ , EP ₁₁₇ , in the diffusion mouth 110.

The distal ends ED ₁₁₃ , ED ₁₁₅ , ED ₁₁₇ of the channels 113, 115, 117 cooperate with selective closing means 200 (visible in Figures 7A to 7G) configured to close or allow the passage of a main flow of air, from an air treatment system (not shown), in all or part of the channels 113, 115, 117. This is detailed later when describing the functional aspects of the proposed technique.

Thus, the selective shutter means 200 are located at the inlet of the ventilation device 100, that is to say at a relatively large distance, namely at least 100 mm, from the air outlet 111. This makes it possible in particular to minimize, or even eliminate, noise pollution linked to the movements of the selective shutter means 200 and/or any turbulence formed by them. This also makes it possible to place the technical means of channel selection and air treatment in a hidden area, generally providing sufficient space.

The proximal ends EP ₁₁₃ , EP ₁₁₅ , EP ₁₁₇ of the channels 113, 115, 117 have a suitable, and static, shape for directing the air circulating in each of the channels 113, 115, 117 towards the outlet slot of air 111 and beyond.

The ventilation device 100 does not have any fixed means of directing the air beyond the channels, that is to say at the level of the air outlet 111, or even protruding from the air outlet 111. This makes it possible in particular to minimize the risks of noise and/or visual nuisance and not to introduce any corresponding technical constraints in terms of design.

Thus, noise and visual nuisance for the occupants of vehicle 1 are reduced or even eliminated.

In this embodiment, the channels 113, 115, 117 are defined by an upper wall 112, a lower wall 118 and two intermediate walls 114, 116. The ventilation device 100 thus comprises an upper channel 113, defined between the upper wall 112 and a first intermediate wall 114, a lower channel 117, defined between the lower wall 118 and a second intermediate wall 116, and a central channel 115, defined between the first and the second intermediate wall 114, 116.

Furthermore, the upper 112, lower 118 and intermediate walls 114, 116 are substantially parallel (while forming an elbow to adapt to the volume available under the dashboard) over most of the length L _C of the channels 113, 115, 117, with the exception of their proximal end EP ₁₁₃ , EP ₁₁₅ , EP ₁₁₇ . This makes it possible to ensure guidance and routing of the air without the formation of turbulence in the channels, or in a greatly reduced manner compared to the prior art.

An exception of parallelism exists at the level of the fixed means for directing the air at the end of the intermediate walls and presenting, on the one hand, at least one boss on at least one of the intermediate walls 114, 116 and, on the other hand , an inclined end portion on each of the upper and lower walls 112, 118.

More precisely, at least one of the intermediate walls 114, 116 has, at the level of the proximal ends EP ₁₁₃ , EP ₁₁₅ , EP ₁₁₇ of the channels 113, 115, 117, at least one boss 1141, 1142, 1161, 1162, adapted to guide the air circulating in the corresponding channel towards the air outlet 111.

The implementation of at least one such boss makes it possible, via the formation of a “Coandă” effect, to orient the circulating air flow arriving from the channel associated with the boss in a desired direction, such that will become clear later when describing the functional aspects of the proposed technique. Such a boss also makes it possible to locally reduce the section of the associated channel, which results in particular in an acceleration of the air circulation speed.

Furthermore, the upper 112 and lower 118 walls respectively have an inclined end portion 1121, 1181, connecting the upper wall 112, respectively lower 118, of said mouth 110 to the air outlet 111. In other words, the proximal end EP ₁₁₃ , EP ₁₁₅ , EP ₁₁₇ of the channels 113, 115, 117 converge towards the air outlet slot 111.

The implementation of such inclined portions 1121, 1181 also contribute to directing the air flow circulating in the lower and upper channels 113, 117 in a desired direction.

Furthermore, in this embodiment, the diffusion mouth 110 gradually widens towards the air outlet 111, as illustrated in the notably. In other words, the air outlet 111 is more flared than the distal ends ED ₁₁₃ , ED ₁₁₅ , ED ₁₁₇ of the channels 113, 115, 117.

Such widening of the air outlet 111 makes it possible in particular to reduce the pressure and to ensure a more homogeneous distribution of the air distributed in the passenger compartment of the vehicle 1. This therefore results in an improvement in the comfort of the occupants. In practice, the area of the section at the level of the proximal ends of the channels remains substantially identical, or is less, than the area of the section at the level of the air outlet, so as to maintain or reduce the pressure, and therefore avoid turbulence.

We now describe ventilation assemblies 10, 10', 10" each formed of a plurality of ventilation devices conforming to the proposed technique as described previously.

Each ventilation assembly 10, 10', 10" comprises at least two air outlets 111 aligned side by side so as to form a wide ventilation zone ZAL on the dashboard 11 of the vehicle 1. In other words , each ventilation assembly 10, 10', 10" has a total air outlet extending over a relatively large length of the dashboard 11 of the vehicle 1, and gives the impression of a single slot, which can deliver air evenly to the user.

Thus, it is possible to effectively ensure controlled distribution of air in the vehicle cabin through a discreet solution, the width of the outlet being less than 10 mm, ergonomic and comfortable, and able to be extend over relatively long lengths.

Furthermore, in this embodiment, the ventilation assembly 10 a ventilation device 100 has a curved air outlet 111 _I , substantially following a curve C ₁₁ of the dashboard 11 of the vehicle 1. In others In other words, the air outlet can be designed to follow the shape of the dashboard of the vehicle in order to improve its visual appearance, while ensuring efficient distribution of air.

Such a ventilation assembly 10, 10', 10" further comprises a control unit (not shown) configured to control the closing or opening of the channels of the ventilation devices 100 globally, independently and/or by sub-assemblies .

For example, such a control unit can be configured to control the closing or opening of the channels of a subset of the ventilation devices 100 associated with the driver.

In the example illustrated, the dashboard 11 of the vehicle 1 comprises, between different parts constituting it, two gaps 12, 12' extending substantially horizontally towards the driver and passenger seats.

The air outlet slots 111 of the pluralities of ventilation devices 100, constituting the three ventilation assemblies 10, 10', 10", are arranged behind the gaps 12, 12' of the dashboard 11, and contiguous to those -ci. Thus, the air outlets 111, and more generally the ventilation devices 100, are entirely housed inside the dashboard 11. Such an arrangement makes it possible to improve the visual comfort of the occupants of the vehicle by freeing itself from any visible part of the ventilation devices 100, other than the air outlet slot.

More precisely, the first ventilation assembly 10 comprises four ventilation devices 100 whose air outlets 111, arranged side by side, adjoin the gap 12 of the dashboard 11. The second and third ventilation assembly 10', 10", located on either side of the steering wheel, comprise two ventilation devices 100 including air outlets 111, arranged side by side , adjoin the gap 12' of the dashboard 11.

Thus, most of the length of the dashboard 11 ensures, through the three ventilation assemblies 10, 10', 10", the function of distributing air to the passenger compartment of the vehicle 1.

In this example, each ventilation device 100 of the three ventilation assemblies 10, 10', 10" comprises an air outlet 111, forming a very fine slot, having a width l _F111 of 7.5 mm.

The three channels 113, 115, 117 each have an essentially constant and rectangular section and extend over a length L _C of at least 100 mm, making it possible to deliver air flows without disturbance. The superposition of the three channels 113, 115, 117 defines a total width of around 40 mm.

Such a configuration, despite the reduced width of the air outlet, allows a significant amplitude of air diffusion, here of around 110°. Indeed, the adapted shapes of the bosses and the inclined edges make it possible to diffuse the air efficiently and selectively.

The selective closing means 200 (visible in Figures 7A to 7G) of the distal ends ED ₁₁₃ , ED ₁₁₅ , ED ₁₁₇ of the channels 113, 115, 117 comprise, in this embodiment, two movable flaps 201, 202, located in the extension of the first and second intermediate walls 114, 116, the movements of which are controlled by suitable means.

More precisely, the first movable flap 201 ensures the closing or opening of upper and central channels 113, 115 while the second movable flap 202 ensures the closing or opening of lower and central channels 117, 115.

Such movable shutters 201, 202 make it possible to ensure, in a simple and effective manner, the closing or opening of the channels 113, 115, 117. Obviously, any other solution making it possible to ensure the closing or opening channels can be considered as long as it causes little or no noise pollution.

Still in the example illustrated, the first and second intermediate walls 114, 116 have a boss 1141, 1142, 1161, 1162 on each of their upper and lower faces, and end in a point 1143, 1163 oriented towards the air outlet 111. Such a configuration makes it possible in particular to increase the precision of the orientation of the air flow circulating in the channel associated with the respective bosses.

5.2.2 Functional aspects

We now describe functional aspects of a ventilation device for a motor vehicle conforming to the proposed technique.

In use, the ventilation device 100 is connected, in particular via the selective closing means 200 of the distal ends ED ₁₁₃ , ED ₁₁₅ , ED ₁₁₇ of the channels 113, 115, 117 of the ventilation device, to the treatment system air generating a main air flow F _P. Thus, the main air flow F _P is routed in all or part of the channels 113, 115, 117 according to the positions of the first and second movable flaps 201, 202 of the selective shutter means 200.

The air present in the ventilation device 100 is then distributed, via the air outlet 111, towards the passenger compartment of the vehicle 1 in the form of a secondary air flow F _S oriented by the associated fixed orientation means to the channels 113, 115, 117 inside which the air circulates.

Figures 7A to 13 illustrate, in different views, several configurations of a ventilation device, conforming to the proposed technique, distributing the secondary air flow in different directions.

THE and 7B illustrate the ventilation device 100 configured to direct the secondary air flow F _S towards the legs of a passenger P of the vehicle 1.

To do this, the first and second movable flaps 201, 202 are controlled to close the central and lower channels 115, 117 so as to circulate the main air flow F _P entirely in the upper channel 113.

The air circulating in the upper channel 113 is then oriented, via the inclined end portion 1121 of the upper wall 112, the boss 1141 of the upper face of the first intermediate wall 114 and its tip, then expelled by the air outlet 111 in the form of a secondary air flow F _S directed towards the bottom of the passenger compartment of the vehicle 1, that is to say towards the legs of the passenger P.

In other words, as the air circulating in the upper channel 113 comes into contact with the boss 1141 of the upper face of the first intermediate wall 114, by application of a "Coandă" effect, it is oriented and propelled downward. This directed air flow then detaches from the first intermediate wall 114 through its tip to be evacuated through the air outlet 111.

THE and 8B illustrate the ventilation device 100 configured to direct the secondary air flow F _S towards the stomach of a passenger P of the vehicle 1.

To do this, the first and second movable flaps 201, 202 are controlled to close the upper and lower channels 113, 117 so as to circulate the main air flow F _P entirely in the central channel 115.

The air circulating in the central channel 115 is then oriented, via the boss 1142 of the lower face of the first intermediate wall 114 and its tip as well as the boss 1162 of the upper face of the second intermediate wall 116 and its tip 1163, then expelled by the air outlet 111 in the form of a secondary air flow F _S directed towards the center of the passenger compartment of the vehicle 1, that is to say towards the belly of the passenger P.

THE and 9B illustrate the ventilation device 100 configured to direct the secondary air flow F _S towards the face of a passenger P of the vehicle 1.

To do this, the first and second movable flaps 201, 202 are controlled to close the upper and central channels 113, 115 so as to circulate the main air flow F _P entirely in the lower channel 117.

The air circulating in the lower channel 117 is then directed, via the inclined end portion 1181 of the lower wall 118, the boss 1161 of the lower face of the second intermediate wall 116 and its tip, then expelled by the air outlet 111 in the form of a secondary air flow F _S directed towards the top of the passenger compartment of the vehicle 1, that is to say towards the face of the passenger P.

Analogous to the , as the air circulating in the lower channel 117 engages with the boss 1161 of the lower face of the second intermediate wall 1164, by application of a “Coandă” effect, it is oriented and propelled upwards. This directed air flow then detaches from the second intermediate wall 116 through its tip to be evacuated through the air outlet 111.

Figures 10A and 10B illustrate the ventilation device 100 configured to direct the secondary air flow F _S towards the thorax of a passenger P of the vehicle 1.

To do this, only the first movable flap 201 is controlled to close the upper channel 113 so as to circulate the main air flow F _P in the central and lower channels 115, 117.

The air circulating in the central and lower channels 115, 117 is respectively oriented as described in Figures 8A,B and 9A,B so that the crossing of the interior air flows defines the secondary air flow F _S directed towards the top center of the vehicle's passenger compartment, that is to say towards the thorax of passenger P.

Figures 11A and 11B illustrate the ventilation device 100 configured to direct the secondary air flow F _S diffusely towards the torso of the passenger P of the vehicle 1.

To do this, the first and second movable flaps 201, 202 do not close any of the channels 113, 115, 117 so as to circulate the main air flow F _P in each of them.

The air circulating in the channels 113, 117, 115 is respectively oriented as described in Figures 7A,B, 8A,B and 9A,B so that the crossing of the interior air flows defines the air flow secondary F _S directed towards the bottom-center-top of the passenger compartment of the vehicle, that is to say substantially towards the entire torso of the passenger P.

There illustrates the ventilation device 100 configured to direct the secondary air flow F _S simultaneously towards the bottom-top of the vehicle passenger compartment.

To do this, the first and second movable shutters 201, 202 are controlled to close only the central channel 115 so as to circulate the main air flow F _P in the upper and lower channels 113, 117.

The air circulating in the upper and lower channels 113, 117 is respectively oriented as described in Figures 7A and 9A so that the crossing of the interior air flows defines the secondary air flow F _S directed downwards. -top of the passenger compartment of vehicle 1.

There illustrates the ventilation device 100 configured to direct the secondary air flow F _S simultaneously towards the lower center of the vehicle passenger compartment.

To do this, only the second movable flap 202 is controlled to close the lower channel 117 so as to circulate the main air flow F _P in the upper and central channels 113, 115.

The air circulating in the upper and central channels 113, 115 is respectively oriented as described in Figures 7A and 8A so that the crossing of the interior air flows defines the secondary air flow F _S directed downwards. -center of the passenger compartment of vehicle 1.

Thus, it appears from Figures 7A to 13 in particular that the proposed technique makes it possible, without requiring the implementation of mobile orientation means arranged at the level of the air outlet 111, to ensure efficient and precise distribution of a air flow directed towards the passenger compartment of the vehicle. Indeed, in the proposed technique, the selective obturation means 200 are coupled to the distal ends ED ₁₁₃ , ED ₁₁₅ , ED ₁₁₇ of the channels 113, 115, 117 of the ventilation device 1.

5.3. Other aspects and variations

In an embodiment not illustrated, a single intermediate wall has, on one of its upper and lower faces, a boss adapted to guide the air circulating in the corresponding channel towards the air outlet.

In another embodiment not illustrated, the ventilation device comprises more than three channels so as to improve the precision of the orientation of the air flow distributed in the passenger compartment of the vehicle.

In yet another embodiment not illustrated, an air-permeable covering, such as a fabric, covers at least the gaps in the dashboard, thus visually giving the impression that it does not have a ventilation device. Such an arrangement contributes to improving the aesthetics of the motor vehicle.

It therefore appears clearly that the proposed technique is not limited to the embodiments described above and provided solely by way of examples. It encompasses various modifications, alternative forms and other variants that those skilled in the art may consider in the context of the present invention and in particular all combinations of the different embodiments described above, which can be taken separately or in combination.

According to different aspects, the proposed technique therefore presents all or part of the following advantages, depending on the embodiments or variants chosen:

- ensure efficient and precise orientation of the secondary air flow;

- ensure large amplitude distribution of the secondary air flow;

- minimize noise and/or visual nuisance from the ventilation system;

- ensure a simple structure of the ventilation device;

- ensure the durability and/or robustness of the ventilation system;

- ensure simple maintenance of the ventilation device;

- improve the aesthetics of the means of transport using at least one ventilation device;

- etc.

Claims (11)

Ventilation device (100) for a motor vehicle (1), comprising an air diffusion vent (110) towards the passenger compartment of said vehicle (1),
characterized in that said diffusion mouth (110) comprises an air outlet (111) forming a slot of width (l_F111) less than 10 mm and is supplied by three superimposed channels (113, 115, 117) extending over a length (L_VS) at least 100 mm,
a distal end (ED₁₁₃, E.D.₁₁₅, E.D.₁₁₇) of said channels (113, 115, 117), remote from said air outlet (111), cooperating with selective closing means (200) of said channels (113, 115, 117) and a proximal end (EP₁₁₃, EP₁₁₅, EP₁₁₇) of said channels (113, 115, 117), in said diffusion mouth (110), comprising fixed means for directing the air circulating in each of said channels (113, 115, 117) towards said outlet slot air (111). Ventilation device (100) according to claim 1, characterized in that said channels (113, 115, 117) are defined by an upper wall (112), a lower wall (118) and two intermediate walls (114, 116), substantially parallel over most of the length of said channels (113, 115, 117), with the exception of said proximal end (EP₁₁₃, EP₁₁₅, EP₁₁₇). Ventilation device (100) according to claim 2, characterized in that at least one of said intermediate walls (114, 116) has, at said proximal end (EP₁₁₃, EP₁₁₅, EP₁₁₇), at least one boss (1141, 1161), adapted to guide the air circulating in the corresponding channel towards said air outlet (111). Ventilation device (100) according to claim 3, characterized in that said intermediate walls (114, 116) have a boss (1141, 1142, 1161, 1162) on each of their upper and lower faces, and end in a point ( 1143, 1163) oriented towards said air outlet (111). Ventilation device (100) according to any one of claims 2 to 4, characterized in that said upper wall (112) and said lower wall (118) have an inclined end portion (1121, 1181), connecting the wall upper, respectively lower, from said diffusion mouth to said air outlet (111). Ventilation device (100) according to any one of claims 1 to 5, characterized in that said diffusion mouth (110) gradually widens towards said air outlet (111). Ventilation assembly (10) for a motor vehicle (1), characterized in that it comprises a plurality of ventilation devices (100) according to any one of claims 1 to 6. Ventilation assembly (10) according to claim 7, characterized in that at least two air outlets (111) are aligned side by side so as to form a wide ventilation zone (ZAL) on a dashboard ( 11) of the vehicle (1). Ventilation assembly (10) according to any one of claims 7 and 8, characterized in that at least one of said ventilation devices (100) has a curved outlet (111_I), following substantially a curve (C₁₁) of the dashboard (11) of the vehicle (1). Ventilation assembly (10) according to any one of claims 7 to 9, characterized in that it comprises a control unit, capable of controlling the closing or opening of the channels of said ventilation devices globally, independently and/or or by subsets. Motor vehicle (1) implementing at least one ventilation device (100₁) according to any one of claims 1 to 6 and/or a ventilation assembly (10) according to any one of claims 7 to 10.