FR3070906A1 - MOTOR VEHICLE NEBULIZATION SYSTEM - Google Patents

Abstract

The invention relates to a nebulizing system (10) for a motor vehicle comprising at least: - a reservoir (12) for a liquid, - a nebulising chamber (14), said nebulizing chamber (14) comprising a nebulizing nozzle ( 22) provided with an acoustic wave emission device configured so that said liquid coming from said reservoir (12) for the liquid forms a mist of droplets of said liquid, said fog being intended to enter a passenger compartment of the motor vehicle, and, a filtration system (16) capable of filtering said liquid contained in said reservoir (12) for the liquid before it passes through said nebulization chamber (14). According to the invention, said reservoir (12) for a liquid is spatially interposed at least partly between said nebulizing chamber (14) and said filtration system (16). Application particularly to the automotive field.

Description

The invention relates to a nebulization system for a motor vehicle.

It relates more particularly to a nebulization system comprising at least one reservoir for a liquid, a nebulization enclosure, said nebulization enclosure comprising a nebulization nozzle provided with an device for emitting acoustic waves transmitted in the liquid and configured for so that the surface of the liquid from the reservoir generates a mist of droplets of the liquid, the mist being intended to penetrate into a passenger compartment of the motor vehicle, and, a filtration system capable of filtering the liquid contained in the reservoir before it passes through the nebulization enclosure.

Such a nebulization system makes it possible to cool and / or humidify an air flow in which the mist of droplets is nebulized.

In the passenger compartment of a motor vehicle, it is not uncommon for the users of the vehicle to suffer from heat in the passenger compartment, and in particular the rear passengers, whose position is furthest from the aerators in conjunction with a ventilation, heating and / or air conditioning system for this vehicle.

Therefore, it is advantageous to use a nebulization system, because the mist of droplets quickly cools the air in the passenger compartment, ensuring an immediate feeling of cold.

However, the existing systems have a large footprint.

The invention aims to improve the situation.

As such, it provides a nebulization system as previously described in which said tank for the liquid comprises at least one so-called lower face is inclined relative to an opposite face called upper, the angle of inclination between said lower inclined face and said opposite upper face preferably being between 10 and 20 °.

Thanks to such a spatial arrangement, it is possible to reduce the size of the nebulization system according to the present invention.

In addition, the present invention allows a submerged filtration system, that is to say below the level of the reservoir liquid for the latter, which facilitates the priming of the nebulization system when it is started.

Other particular embodiments of the invention propose that:

- the tank for the liquid is of parallelepiped shape.

- the tank for the liquid is interposed at least partially between the nebulization chamber and the filtration system.

- Said tank for the liquid comprises a parallelepiped shape of which at least one so-called lower face is inclined relative to an opposite face called upper, the angle of inclination between said inclined lower face and said opposite upper face preferably being between 10 and 20 °,

said inclined lower face comprises at least one means for retaining said said filtration system,

said inclined lower face comprises a protrusion disposed at a so-called lower end of said inclined lower face, said protrusion being able to be subjected to at least one pump of the hydraulic circuit of the nebulization system,

- said protuberance comprises a first protuberance having a main extension axis substantially parallel to a so-called lateral face of the reservoir for the liquid and being able to be subjected to a pump for draining the hydraulic circuit of the nebulization system,

- said protuberance comprises a second protuberance having a main extension axis substantially parallel to the opposite upper face of the reservoir for the liquid and being capable of being subjected to a pump for setting in motion the liquid of the hydraulic circuit of the nebulization system,

- said protuberance is also arranged in a substantially central manner so as to create two clearances on either side of the latter,

said reservoir for the liquid is produced in at least two parts, one of which forms a cover and comprising at least one positioning means for said nebulization enclosure,

- said tank for the liquid comprises a recess making it possible to accommodate at least partially an inlet module for the air of said nebulization system,

- said filtration system is disposed in an inclined manner with respect to a longitudinal axis of said nebulization enclosure and with respect to the opposite upper face of the tank for the liquid,

- said nebulization system includes a priming circuit,

-the said nebulization system includes a drainage circuit,

said nebulization system includes a filling circuit,

- Said nebulization system includes command and control electronics such as sensors, actuators, and / or a man-machine interface.

- said air injection volute is suitable for being applied against an opening of said nebulization enclosure,

- said air injection volute has a spiral shape that wraps around said nebulization enclosure,

- said air inlet module is subject to said nebulization enclosure,

- said air inlet module comprises at least one support for an air movement fan,

- said air inlet module includes an air filter,

- said fan and / or said air filter are arranged in an extension direction perpendicular to a longitudinal axis of said spray enclosure and on one side of the spray system, and,

- Said tank for the liquid has a shape making it possible to at least partially accommodate said air inlet module.

The invention also relates to a ventilation, heating and / or air conditioning device for a motor vehicle and / or a motor vehicle comprising a nebulization system as previously described.

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

FIG. 1 illustrates a perspective view of a nebulization system according to an embodiment where the nebulization system is integrated in a central console of a partially represented motor vehicle,

FIG. 2 illustrates a partial perspective view in section of a nebulization system according to the invention and showing schematically a part of the air and hydraulic circuits of the nebulization system,

FIG. 3 illustrates a perspective view of a liquid reservoir of a nebulization system according to the present invention, and,

- Figure 4 illustrates a front view of the liquid reservoir of a nebulization system of Figure 3.

The invention relates to a nebulization system 10 comprising at least one reservoir 12 for a liquid, a nebulization enclosure 14 and a filtration system 16.

The liquid in the tank could, for example, be water.

The filtration system 16 is capable of filtering the liquid contained in the reservoir 12 for the latter before it passes through the nebulization enclosure 14. The filtration system 16 is capable of filtering the liquid contained in the reservoir 12 and may, by example, forming an anti-bacterial barrier.

In this example, the filtration system 16 is arranged in a fluid manner between the reservoir 12 for the liquid and the nebulization enclosure 14.

The nebulization chamber 14 is produced, here, in the form of an elongated hollow body extending along a longitudinal axis A.

In the embodiment illustrated in the figures, the longitudinal axis A is horizontal.

The nebulization enclosure 14 comprises at least two parts arranged, here, one after the other in the direction of the longitudinal axis A, namely a nebulization chamber 20 and a nebulization chimney 18. In in other words, the nebulization chamber 20 and the nebulization chimney 18 are coaxial.

In the embodiment illustrated here, the nebulization chamber 20 has a larger cross section than that of the nebulization chimney 18. In this example, the nebulization chamber 18 extends at least partially inside the chamber nebulization 20.

In the embodiment illustrated here, the spray chimney 18 and the spray chamber 20 are of cylindrical shape of generally circular section, concentric and both extend along the longitudinal axis, here horizontal.

The nebulization chamber 14 comprises a nebulization nozzle 22 provided with an acoustic wave emission device transmitted in the liquid configured so that the surface of the liquid coming from the reservoir 12 for the latter generates a mist of droplets of the liquid , this mist being intended to penetrate into a passenger compartment of the motor vehicle.

The longitudinal axis of the nebulization nozzle 22 is substantially parallel to the longitudinal axis A of the nebulization enclosure 14, namely that it is horizontal in the embodiment of the invention illustrated.

The nebulization nozzle 22 is disposed at least partially inside the nebulization enclosure 14 and, in particular, in the nebulization chamber 20. The insertion of the nebulization nozzle 22 can be carried out by the through an opening (not shown) with, if necessary, interposition of a seal (also not shown).

The nebulization nozzle 22 has a side wall defining an interior volume capable of containing the liquid to be nebulized. The inner cross section of this side wall has a gradual narrowing in the direction of an outlet orifice for the liquid 24. The gradual narrowing makes it possible to form a concentrator of acoustic waves.

A piezoelectric element (ceramic) is arranged opposite the outlet port 24 for the liquid.

The piezoelectric element is capable of emitting acoustic waves in the liquid to be sprayed, which makes it possible to generate a mist of liquid droplets when the nebulization nozzle 22 is filled by the latter and when the piezoelectric element emits acoustic waves of appropriate frequency and intensity. Preferably, the piezoelectric element may emit ultrasound, the frequency of which will be between 1 MHz and 3 MHz, in particular between 1.7 MHz and 2.4 MHz.

The piezoelectric element is, for example, a quartz.

For example, the diameter of the droplets contained in the mist is less than 10 µm.

The nebulization nozzle 22 also comprises at least one inlet orifice 23 for the liquid to be nebulized which allows the introduction of the liquid to be nebulized into the interior volume of the nozzle.

In a particular example, a plurality of inlet ports 23, for example four, for the liquid are provided around the longitudinal axis of the nebulization nozzle 22, in an area close to the piezoelectric element.

At least one means of detecting the lack of liquid can also be provided. The means for detecting the lack of liquid could, for example, be a level sensor.

The nebulization system 10 further comprises an inlet module 26 for the air, this inlet module 26 for the air being subject to the nebulization enclosure 14.

The air inlet module 26 is, in this example, fixed, in particular removably, to the nebulization chamber 20.

The air inlet module 26 has at least one support for an air movement fan.

The air inlet module 26 further comprises a filter 28 for the air which may, for example, be arranged at the inlet of the fan, and again for example, arranged on the latter. The air filter 28 may, for example, have pores with dimensions of at least 0.2 µm.

As an example not shown, the nebulization system 10 may include a deflector capable of directing the air towards the inlet module 26 for air and therefore towards the nebulization system 10.

A grid may also be provided disposed on the filter 28 for the air capable of protecting this filter.

It will be noted that the fan and the filter 28 for the air are, here, arranged in an extension direction perpendicular to the longitudinal axis A of the spray enclosure 14 and on one side of the spray system 10. Here , the fan and the filter 28 for the air are arranged near a mist outlet duct 34 which will be described later. Such an arrangement is advantageous in that it is compact and also makes it possible to protect the filter in the event of falling elements. Indeed, in case of falling elements, they will fall on the frame of the filter 28 for air and not on the filter medium of the latter.

An embodiment not illustrated proposes that either the fan or the filter 28 for the air be arranged in an extension direction perpendicular to the longitudinal axis A of the spray enclosure 14 and on one side of the spray system 10 .

For this purpose, the reservoir 12 for the liquid comprises a notch or a shape making it possible to accommodate at least partially the inlet module 26 for the air and, in particular, the fan and / or the filter 28 for the air.

The air input module 26 also includes an air injection volute 30 which makes it possible to channel the air coming from the fan, in the direction of the interior volume of the nebulization enclosure 14. In particular, the volute of air injection 30 makes it possible to rotate the air around the nebulization chimney 18 while directing this air towards and around the nebulization nozzle 22.

One embodiment proposes that the air injection volute 30 has a semicircle shape in front view.

The air injection volute 30 is suitable for being applied against the nebulization chamber 14 and, in particular, against the nebulization chamber 20 at an opening (not shown) called the air inlet opening. , with, if necessary, interposition of sealing means not shown.

The shape of the air injection volute 30 may also have a spiral shape that wraps around the nebulization enclosure 14 which makes it possible to obtain an effect of rotation of the air in a spiral around the nebulization chamber 14 so as to feed it even more effectively. Such a shape makes it possible to have an air flow of uniform speed around the nebulization nozzle 22 at least in the direction of the longitudinal axis A.

In the example illustrated here, the nebulization system 10 comprises redirection means 32, making it possible to modify the direction of flow of the air from the air injection volute 30 towards the vicinity of the nebulization nozzle 22 Such means make it possible, in the example illustrated here, to redirect the air around the nebulization nozzle and parallel to the jet of liquid which leaves the latter.

In other words and as illustrated in FIG. 2, the air enters the nebulization system 10 via the inlet module 26 for the air and, in particular, through the filter 28 for the air. then crosses the fan. The air flows in this phase of its path perpendicular to the longitudinal axis A of the spray enclosure 14.

Thereafter, the air arrives in the injection volute 30 before entering the nebulization chamber 14 at the level of the nebulization chamber 20. The injection volute 30 allows the introduction of air into the nebulization chamber 20 so, here also perpendicular to the longitudinal axis A of the nebulization enclosure 14.

The air introduced into the nebulization chamber 20 then flows parallel to the longitudinal axis A of the nebulization enclosure 14 and against the direction of the direction taken by the liquid nebulized by the nebulization nozzle 22 and this until it hits the redirection means 32.

The redirection means 32 then orient the air substantially parallel (cocurrent) to the direction taken by the nebulized liquid in the nebulization nozzle 22.

The mixture between the air and the nebulized liquid occurs in the nebulization chamber 14, in particular in the nebulization chamber 20. Thus, the air contributes to expel the mist from the nebulization system 10.

The nebulization system 10 also includes at least one mist outlet duct 34 or 36.

Here, the mist outlet duct 34 or 36 is disposed at the level of the nebulization chamber 14 and, in particular, in the nebulization chimney part 18 of the latter and in its distal part of the nebulization nozzle 22.

In the embodiments of the invention illustrated here, the nebulization system 10 comprises two mist outlet ducts 34 and 36.

Each of the fog outlet conduits 34 and 36 here extends to a terminal orifice placed in fluid connection with at least one aerator 48 of the motor vehicle and thus the passenger compartment of this same vehicle.

In the embodiment illustrated here, and by way of example, each of the mist outlet ducts 34 and 36 diverges laterally from the nebulization chamber 14 at an angle of approximately 55 ° with the longitudinal axis A and with the liquid jet leaving the nebulization nozzle 22. The general extension axes of the two mist outlet conduits 34 and 36 form an angle of approximately 110 ° to 130 ° therebetween.

It is possible to provide that at least one of the mist outlet conduits 34 or 36 is provided with a flap making it possible to control a flow of mist.

The nebulization chimney 18 is extended after its junction with the mist outlet conduits 34 and 36 by a tube said to evacuate the non-nebulized liquid 38.

The non-nebulized liquid evacuation tube 38 is intended for the flow of non-nebulized liquid with which a fraction of large drops is optionally mixed. The term large drops means drops with a diameter greater than 10 μm.

The non-nebulized liquid evacuation tube 38 is extended here by an end portion whose passage section decreases, preferably continuously, in the direction of a terminal orifice 44.

The terminal orifice 44 is, here, placed in communication with a filling line 46 of the nebulization system 10.

The filling pipe 46 of the nebulization system 10 also has an inlet 50 through which the nebulization system 10 is supplied with liquid.

One embodiment proposes that a nozzle 52 having a flared or funnel shape be adapted on the filling pipe 46. The funnel shape makes it possible to better direct the liquid towards the reservoir 12 for the liquid. In addition, this form is also advantageous in that it accommodates different elements such as a pre-filter.

In an exemplary embodiment not shown, the end piece 52 comprises a filter known as a pre-filter for the liquid to be nebulized, which makes it possible to eliminate particles of large diameter in the liquid, in particular when filling the reservoir 12 for the liquid .

The pre-filter advantageously retains particles whose diameter is greater than 30 μm and preferably between 50 and 200 μm and this so as to retain particles such as grains of sand, for example. This pre-filter may be removable so that it can be changed periodically.

The end piece 52 and the filling line 46 form, here, part of the filling circuit of the nebulization system 10.

Filling with liquid (in particular with water) of the nebulization system 10 according to the invention can be done by means of a hatch accessible by a rear passenger of the motor vehicle equipped with the nebulization system 10.

It is also possible that the nebulization system 10 includes an indicator for displaying the filling level of the reservoir. One embodiment proposes that the latter be arranged at the level of the central console 100 of the motor vehicle.

The nebulization system 10 for a motor vehicle comprises, as indicated above, a reservoir 12 for the liquid.

The reservoir 12 for the liquid has a shape having at least one wall inclined with respect to a wall situated opposite this inclined wall.

In the embodiment illustrated here, the reservoir 12 for the liquid has a parallelepiped shape having 6 faces including at least one so-called lower face 60, a so-called upper face 62 and four lateral faces. In other words, at least two side faces located opposite are of different dimensions, and, in particular of different height.

According to the invention, the lower face (or wall) 60 is inclined relative to an opposite upper face 62 and has a length and a width.

A particular embodiment proposes that the angle of inclination between the inclined lower face 60 and the opposite upper face 62 is preferably between 10 and 20 °.

Here, the angle of inclination between the inclined lower face 60 and the longitudinal axis A is preferably between 10 and 20 °.

The inclined lower face 60 of the reservoir 12 for the liquid comprises at least one retention means 64 for the filtration system 16.

In the embodiments illustrated here, two retention means 64 for the filtration system 16 are provided and are produced in the form of half-rings capable of enclosing the filtration system 16, here, produced in a cylindrical shape.

Thus, the inclined lower face 60 maintains the filtration system 16 in an orientation which is also inclined. In other words, the filtration system 16 is disposed in an inclined manner with respect to the longitudinal axis A of the spray enclosure 14. In other words, the filtration system 16 is disposed in an inclined manner with respect to to the opposite upper face 30 of the reservoir 12 for the liquid. Such an arrangement is advantageous in that there is no water retention point in the nebulization system 10, which facilitates the emptying of the nebulization system 10 according to the present invention. In addition, this arrangement allows not to plan the nebulization system when the motor vehicle is in operation and whatever its dynamics.

According to a particular embodiment of the invention, the inclined lower face 60 has a protrusion 74 disposed at a so-called lower end of said inclined lower face 60.

The protuberance 74 is suitable for being subject to at least one element of the hydraulic circuit of the nebulization system 10 such as for example a pump.

The protuberance 74 comprises a first protuberance 76 having a main extension axis substantially parallel to a so-called lateral face of the reservoir 12 for the liquid and is capable of being subjected to a pump (or valve) for emptying 54 of the hydraulic system of the system. nebulization 10.

One embodiment proposes that a suction strainer 75 is provided at the interface with the protrusion 74 and the first protuberance 76. This suction strainer has the function of stopping any particles circulating in the hydraulic circuit of the system. nebulization 10. The suction strainer may, for example, have pores between 10 and 30 μm and preferably 20 μm.

The protuberance 74 further comprises a second protuberance 81 having a main extension axis substantially parallel to the opposite upper face 62 of the reservoir 12 for the liquid and is capable of being subjected to pump 56 for setting in motion the liquid of the hydraulic circuit. of the nebulization system 10.

In the embodiments shown, the protuberance 74 is arranged in a substantially central manner over the width of the inclined lower face 60 and this so as to create two clearances 79 on either side of this protrusion 74.

Preferably, the filtration system 16 is arranged opposite and / or in the extension of the protuberance 74.

Such an arrangement is advantageous in that two clearances 79 are thus created. The two clearances 79 each form a passage in which it is possible to have other elements of the motor vehicle such as, for example, ducts for air.

In a particular embodiment, the reservoir 12 for the liquid is produced in at least two parts, one part forming a cover 68 and comprising at least one positioning means 66 for the nebulization enclosure 14.

Here, the cover 68 corresponds to the opposite upper face 62 and extends along a substantially horizontal plane.

The positioning means 66 for the nebulization enclosure 14 may be produced in the form of a cylindrical barrel having an opening in its central part capable of receiving a complementary means disposed opposite the nebulization enclosure 14 .

A particular embodiment proposes that the positioning means 66 be provided with reinforcing ribs so as to support the weight of the nebulization enclosure 14.

In another particular embodiment, the reservoir 12 for the liquid and, in particular, the cover 68 comprises a plate 78 provided with openings for the passage of electrical connectors.

In yet another particular embodiment, the reservoir 12 for the liquid and, in particular, the cover 68 includes a support means 70 for the nebulization enclosure 14 and in particular the nebulization chimney part 18 of the latter.

The reservoir 12 for the liquid also comprises a recess 72 making it possible at least partially to accommodate the inlet module 26 for the air of the nebulization system 10.

The nebulization system 10 includes a priming circuit 80 provided with a bypass valve 82.

In one embodiment, the priming circuit 80 is placed between the pump 56 for setting in motion the liquid and the reservoir 12 for the liquid. It allows, when the nebulization system 10 is in priming mode, to prime the pump 56 for setting in motion the liquid before forcing the fog into the passenger compartment. Indeed, after a certain unused time, it may lose pressure and no longer be able to function properly. Such a characteristic has an impact on the droplets formed and therefore ultimately on the comfort of the user. The priming circuit 80 makes it possible to remedy such a drawback by re-establishing the operating pressure of the pump 56 for setting in motion the liquid before injecting the droplets into the passenger compartment.

The nebulization system 10 also includes a circuit 84 for transferring the liquid from the reservoir 12 for the liquid to the nebulization nozzle 22.

The liquid transfer circuit is composed of a main circuit between the reservoir 12 for the liquid and the nebulization nozzle 22 and a drain circuit comprising, here, a drain member 54.

The draining member 54 could be, for example, a two-way valve making it possible to close or open said hydraulic circuit of the nebulization system 10.

The drainage circuit allows the water to be removed from the nebulization system 10. The emptying is carried out by gravity, for example periodically and preferably monthly or periodically in the event of liquid freezing in the nebulization system 10.

As seen above, the nebulization system 10 also includes a pump 56 for setting in motion the liquid.

In the embodiments shown, the pump 56 for setting in motion the liquid is fluidly connected to the reservoir 12 for the liquid and this by means of a pipe.

The reservoir 12 for the liquid is interposed at least in part between the nebulization chamber 14 and the filtration system 16.

The interposition of the reservoir 12 for the liquid between the nebulization chamber 14 and the filtration system 16 is here spatial.

Thanks to such a spatial arrangement, it is possible to reduce the size of the nebulization system according to the present invention.

In addition, the present invention allows a submerged filtration system, that is to say below the level of the reservoir liquid for the latter, which facilitates the priming of the nebulization system when it is started.

The filtration system 16 comprises at least one filter provided with a membrane provided with pores less than 50 μm, and preferably less than 20 μm.

The filtration system 16 may for example comprise two filters or a higher number depending on both the degree of purification desired and the source of the water.

Here, the filtration system comprises an envelope of substantially cylindrical shape. Other embodiments propose that the filter be of rectangular or square shape.

The filtration system 16 is placed upstream of the nebulization nozzle 22 generating the mist and downstream of the pump 56 for setting in motion the liquid relative to the direction of flow of the liquid to be nebulized in the circuit.

The filtration system 16 ensures that the nebulized liquid and, in particular, the water nebulized in the mist is healthy for the users of the vehicle. This is all the more important when the droplets have a diameter of less than 10 μm, in which case they penetrate into the lungs of the vehicle users.

The nebulization system 10 may also include a water softener which in known manner makes it possible to reduce the hardness of the water by reducing the amount of lime, and thereby increases the life of the system.

The water softener could, for example, be installed in the reservoir 12 for the liquid to be nebulized.

The nebulization system 10 may include command and control electronics such as sensors, actuators, and / or a man-machine interface.

The nebulization system 10 can be integrated in a motor vehicle, for example in a central console as illustrated in part in FIG. 1. In particular, the nebulization system 10 can be placed in a housing situated above and / or between rear air ducts and below the front seat armrests.

Claims (10)

claims 1. Fogging system (10) for a motor vehicle comprising at least: - a reservoir (12) for a liquid, - a nebulization enclosure (14), said nebulization enclosure (14) comprising a nebulization nozzle (22) provided with an acoustic wave emission device configured so that said liquid from said reservoir (12) for the liquid forms a mist of droplets of said liquid, said mist being intended to penetrate into a passenger compartment of the motor vehicle, and, - a filtration system (16) capable of filtering said liquid contained in said reservoir (12) for the liquid before it passes through said nebulization enclosure (14) characterized in that said reservoir (12) for the liquid comprises at least one said lower face (60) is inclined relative to an opposite so-called upper face (62), the angle of inclination between said lower inclined face (60) and said upper opposite face (62) preferably being between 10 and 20 °. 2. nebulization system (10) for a motor vehicle according to claim 1 wherein the reservoir (12) for the liquid is of rectangular shape. 3. nebulization system (10) for a motor vehicle according to the preceding claim wherein said inclined lower face (60) comprises at least one retention means (64) of said said filtration system (16). 4. nebulization system (10) for a motor vehicle according to one of the preceding claims wherein said inclined lower face (60) has a protrusion (74) disposed at a so-called lower end of said inclined lower face (60), said protrusion (74) being able to be subjected to at least one pump of the hydraulic circuit of the nebulization system (10). 5. nebulization system (10) for a motor vehicle according to the preceding claim wherein said protuberance comprises a first protuberance (76) having a main extension axis substantially parallel to a so-called lateral face of the reservoir (12) for the liquid and being able to be subjected to a drain member (54) of the hydraulic circuit of the nebulization system (10). 6. nebulization system (10) for a motor vehicle according to the preceding claim wherein said protuberance comprises a second protuberance (81) having a main extension axis substantially parallel to the opposite upper face (62) of the reservoir (12) for the liquid and being able to be subjected to a pump (56) for setting in motion the liquid of the hydraulic circuit of the nebulization system (10). 7. nebulization system (10) for a motor vehicle according to one of claims 4 to 6 5 wherein said protuberance (74) is further disposed in a substantially central manner so as to create two clearances 79 on either side of the latter. 8. nebulization system (10) for a motor vehicle according to one of the preceding claims wherein said tank (12) for the liquid comprises a recess (72) making it possible to accommodate at least partially an input module (26) for air said system 10 nebulization (10). 9. nebulization system (10) for a motor vehicle according to one of the preceding claims wherein said filtration system (16) is disposed in an inclined manner with respect to a longitudinal axis (A) of said nebulization enclosure (14). 10. nebulization system (10) for a motor vehicle according to one of the preceding claims 15 in which said tank (12) for a liquid is spatially interposed at least in part between said nebulization enclosure (14) and said filtration system ( 16).