FR3086556A1 - FLUID SUPPLY SYSTEM AND NEBULIZATION SYSTEM FOR A MOTOR VEHICLE EQUIPPED WITH SUCH A SUPPLY SYSTEM - Google Patents

Abstract

The invention relates to a fluid supply system for a nebulization system (1) for a motor vehicle, said supply system comprising: - a primary reservoir (10) for supplying fluid to a nebulizer (50) ; - a generator (72) of ultraviolet radiation, the fluid supply system being characterized in that said generator (72) of ultraviolet radiation is located on the primary reservoir (10) so as to eliminate bacteria present in the fluid contained at least in said tank.

Description

The invention relates to a fluid supply system. The invention further relates to a nebulization system for a motor vehicle equipped with such a supply system. It is more particularly intended for the generation of fine droplets making it possible to cool and / or humidify a vector flow, in particular a flow of air so as to form a refreshing mist.

In a passenger compartment of a motor vehicle, it is not uncommon for vehicle users to suffer from heat in the passenger compartment, and, in particular, rear passengers. The sometimes too dry air in an air conditioning system can also be perceived as a nuisance.

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. In addition to traditional air conditioning, it rewets the too dry air.

Existing devices conventionally include a fluid reservoir and a nebulization enclosure, supplied with fluid from the reservoir and provided with a piezoelectric atomizer which, by emitting acoustic waves at a certain frequency, makes it possible to transform the fluid into droplets. Before entering the nebulization chamber, the fluid passes through a filtration system comprising an antibacterial membrane allowing the bacteria contained in the fluid to be filtered.

This filtration system is not completely satisfactory. In fact, in the long term, in addition when the fluid used has an uncontrolled concentration of bacteria, the membrane accumulates a high proportion of bacteria, inducing a significant pressure drop within the system. Maintenance must be carried out to replace the filtration system, or even the nebulization system. To increase the service life of such a filtration system prior to its installation within the nebulization system, it would be necessary to increase the surface dimensions of the membrane or to add an additional membrane. The filtration systems conventionally used have relatively large dimensions which represent a compromise between the efficiency of the system and its lifespan.

In addition, given its configuration, the filtration system is formed apart from the other elements of the nebulization system while being installed on the fluid supply circuit. This configuration certainly has advantages but does not allow the fluid to be treated in the place where it is most conducive to bacterial proliferation. Indeed, the fluid present at the bottom of the tank and the air contained in the tank concentrate a large proportion of bacteria, which in the long term form a kind of mud from which emanates bad odors.

There are also known nebulization systems comprising a nebulizer, a nebulizer fluid supply system and an ultraviolet radiation generator in fluid communication with the supply system and / or with the nebulizer. In this type of nebulization system, the ultraviolet radiation generator is located on the fluid circuit which allows it to eliminate the bacteria contained in the fluid. Similar to the previous configuration, the ultraviolet radiation generator is not positioned so as to allow treatment of bacteria in the area where they are likely to proliferate.

The invention proposes to overcome the aforementioned drawbacks and proposes for this purpose a fluid supply system for a nebulization system for a motor vehicle, said supply system comprising a primary reservoir for supplying fluid to a nebulizer. and an ultraviolet radiation generator.

This fluid supply system is characterized in that said ultraviolet radiation generator is located on the primary reservoir so as to eliminate bacteria present at least in the fluid contained in said reservoir.

The idea of such an invention is to provide an ultraviolet radiation generator positioned directly on the primary reservoir so as to efficiently treat the fluid included in said primary reservoir, in particular at the bottom of said primary reservoir. In other words, the invention makes it possible to treat not only the liquid contained in the reservoir, in particular the liquid contained at the bottom of the reservoir, but also the air present above the liquid. It also makes it possible to treat the internal surface of the walls of the tank.

According to different characteristics of the invention which can be taken together or separately:

- the ultraviolet radiation generator consists of a photolysis reactor with light-emitting diodes, configured to generate said radiation, in particular light-emitting diodes emitting at wavelengths between 100 and 280 nm, in particular between 200 and 280 nm;

- the ultraviolet radiation generator is substantially planar;

- The ultraviolet radiation generator comprises a flange;

- Said flange supports an internal body which are mounted the light emitting diodes;

- the internal body is made of stainless steel;

- The internal body defines an internal channel allowing the circulation of the fluid along said internal body, in particular so that the fluid passing through said internal channel allows cooling of said diodes;

- Said ultraviolet radiation generator is located on an upper wall of the primary tank;

- Said ultraviolet radiation generator is located on a lower wall of the primary reservoir;

- Said ultraviolet radiation generator is located on one of the side walls of the primary tank;

the primary reservoir comprises, on one of said upper, lower or lateral walls, one or more orifices making it possible to receive the generator of ultraviolet radiation,

- The flange is provided with means for fixing to said orifices;

the supply system comprises a primary supply circuit for the nebulization system and a secondary circuit;

- Said ultraviolet radiation generator is in fluid communication with the secondary circuit;

- the secondary circuit is made up of a system for recovering large drops from the nebulizer;

- Said ultraviolet radiation generator is in fluid communication with the primary circuit;

- said supply system comprises a pump for setting in motion the fluid configured to supply the nebulizer with fluid from the primary reservoir,

- said radiation generator being connected to said pump;

- Said fluid setting pump comprises a suction strainer;

- said ultraviolet radiation generator is connected to the suction strainer;

- the walls of the primary tank are made of a reflective material;

- The walls of the primary tank have a coating on their inner faces capable of reflecting ultraviolet radiation;

- the power supply system is equipped with an electronic card electrically connected to the light-emitting diodes,

- said electronic card is dedicated to supplying current to said light-emitting diodes;

- the electronic card extends into a housing formed at the level of the primary reservoir;

- the electronic card is located outside the primary tank.

The invention also relates to a nebulization system for a motor vehicle comprising a fluid supply system as described above, and a nebulizer comprising a nebulization chamber supplied with fluid by the fluid supply system.

Advantageously, said nebulization enclosure comprises an atomizer capable of generating acoustic waves so that the fluid coming from the supply system is transformed into fine droplets then spread in the form of mist outside the nebulization system in the living space of the vehicle

The invention further relates to a tank intended to be used as a primary tank in the supply system as described above.

Other objects, characteristics and advantages of the invention will appear more clearly in the description which follows, given with reference to the appended figures, in which:

- Figure 1 is a side view of a nebulization system equipped with a supply system according to the invention;

- Figure 2 is a longitudinal sectional view of the nebulization system, the cutting plane being vertical and passing medially through an enclosure of the supply system;

- Figure 3 schematically illustrates, in section, an ultraviolet radiation generator of the power system according to the invention;

- Figure 4 illustrates schematically, in perspective, an upper wall of a primary tank of the supply system according to the invention;

- Figure 5 illustrates schematically, in perspective, the primary tank whose upper wall is illustrated in Figure 4;

- Figures 6a and 6b schematically illustrate other possible configurations for the installation of the ultraviolet radiation generator according to the invention at the primary reservoir.

With reference to Figures 1 and 2, the invention relates to a nebulization system 1 comprising a fluid supply system and a nebulizer.

The nebulization system 1 is intended to generate a mist of droplets capable of rapidly cooling the air in the passenger compartment of a vehicle and ensuring an immediate feeling of cold for the passengers of said vehicle. It is located, for example, in a central console located between two seats located at the front of the motor vehicle and is thus hidden from the view of passengers. This location is practical to allow a diffusion of the mist of droplets towards the seats located at the rear of the vehicle when the said nebulization system 1 is in operation.

In this regard, the nebulizer comprises a nebulization enclosure 50 supplied with fluid by the supply system. The nebulization chamber 50 consists of a hollow body of elongated shape extending longitudinally along a longitudinal axis X. It comprises an atomizer 53 capable of generating acoustic waves so that the fluid coming from the supply system is transformed into fines droplets, that is to say nebulized, then spread in the form of mist in the vehicle interior.

The supply system comprises a primary tank 10 for supplying fluid to the nebulizer, and a secondary tank 20. The secondary tank 20 can be mounted on the primary tank 10 in a removable manner.

Preferably, the primary reservoir 10 for the fluid has a limited volume. This volume is limited in that it does not constitute the essential, that is to say the largest part of the volume made available by all of said primary tanks 10 and secondary 20. In this, the primary tank 10 forms a buffer tank.

Preferably, the secondary tank 20 is isolated from the outside atmosphere. In other words, it is hermetically sealed before any use. It is intended to be previously filled with fluid. Said secondary tank 20 is thus in the form of a "ready to use" tank filled with the fluid to be nebulized. In other words, it forms a backup tank.

Preferably, the secondary tank 20 is in fluid communication with the primary tank 10 in a unidirectional manner in order to allow a circulation of the fluid from the secondary tank 20 to the primary tank 10. In such a configuration, the communication between said primary tanks 10 and secondary 20 being monodirectional, the fluid cannot circulate in the opposite direction, that is to say from the primary reservoir 10 to the secondary reservoir 20, once it is in the primary reservoir 10.

The supply system comprises a pump 40 for setting in motion the fluid. The pump 40 is configured to supply the nebulization enclosure 50 with the fluid coming from the primary reservoir 10. It is advantageously located downstream of the primary reservoir 10 and upstream of the nebulization enclosure 50 relative to the direction of flow of the fluid .

The nebulization enclosure 50 comprises at least one nebulization chamber 51 and a nebulization chimney 54. The nebulization chamber 51 and the nebulization chimney 54 are arranged, here, one after the other in the direction of the longitudinal axis X. In other words, the nebulization chamber 51 and the nebulization chimney 54 are coaxial. They are cylindrical in shape and generally circular, concentric. It can be noted that the nebulization chamber 51 has a larger cross section than that of the nebulization chimney 54.

The nebulization chamber 51 also includes a nebulization nozzle 52 provided with the atomizer 53.

The longitudinal axis of the nebulization nozzle 52 is substantially parallel to the longitudinal axis X, in this case it is horizontal in FIG. 2. The nebulization nozzle 52 is arranged at least partially inside the chamber nebulization 51.

The nebulization nozzle 52 has a side wall defining an interior volume capable of containing the liquid to be nebulized. The internal cross section of this side wall may have a progressive narrowing in the direction of an outlet orifice for the fluid, in particular by being of parabolic shape. The progressive shrinkage forms a concentrator of acoustic waves.

The nebulization nozzle 52 also includes at least one inlet orifice 52a for the fluid to be nebulized which allows the introduction of the fluid into the interior volume of the nozzle. The inlet port 52a is in fluid communication with the pump and / or the filter. In a particular example, a plurality of inlet orifices 52a, for example four, for the fluid are provided around the longitudinal axis X of the nebulization nozzle 52, in an area close to the atomizer 53. The orifices 52a are preferably distributed angularly around the longitudinal axis X.

The nebulization nozzle 52 also comprises at least one outlet orifice 52b through which a part of the fluid is expelled from said nozzle 52 while being transformed into droplets when the atomizer is supplied. The outlet port 52b is preferably located at an equal distance from all the inlet ports 52a in the event that the nozzle 52 has a plurality of inlet ports 52a.

Preferably, the atomizer 53 consists of a piezoelectric element (ceramic). The piezoelectric element is capable of emitting acoustic waves in the fluid to be nebulized, which makes it possible to generate a mist of droplets of the fluid when the nebulization nozzle 52 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, made of lead titano-zirconate.

For example, the diameter of the droplets contained in the mist follows a Gaussian profile located between 0 and 20 μm, this profile being centered on 2 to 3 μm in terms of number of drops and on 5 to 10 μm in terms of volume of drops.

For the purpose of transporting the droplets of the fluid, the nebulizer is fluidly connected to a system for generating a vector flow, in particular an air flow (not visible).

The system for generating a vector flow, in particular of air, is located on the other side of the nebulization system 1, in particular between the primary reservoir 10 and the secondary reservoir 20. It is connected to the nebulization enclosure 50 at the level of the nebulization chimney 54 so as to generate an air flow inside said nebulization chimney 54. The air coming from the generation system enters the chimney 54 via a channel 62 (illustrated in fig. 2). This supply channel 62 comprises a filter and an air flow generator (not visible) making it possible to generate an air flow whose flow rate is between 5 and 10 m ³ / h (cubic meter per hour). In this way, the droplets leaving the spray nozzle 52 are transported in the form of a spray of droplets from the spray chimney 54 to an outlet 55 of the spray enclosure 50, as illustrated by dotted arrows at the figure 2. Concomitantly, the flow rate of the droplet mist generated at the level of the nebulization chimney is substantially equal to the flow rate of fluid flowing in the primary tank 10. This flow rate is between 0 and 20 ml / min (milliliter per minute ) about.

However, only the finest droplets can exit from the nebulization enclosure 50. In fact, the nebulization chimney 54 comprises an inclined portion 54a, which in this case is inclined upwards from the nebulization system 1. The inclined portion 54a allows, because of its inclination, to filter the droplets according to their weight. In other words, the inclined portion 54a is selective as regards the weight of the droplets.

In fact, during their transport in the vector stream, the largest droplets which have not had enough momentum to travel entirely through the inclined portion 54a, in particular because of their weight, fall back into a straight portion 54b of said chimney 54.

These large droplets are then recovered at a recovery system 80, 82 of large drops from the fluid supply system. As illustrated in FIG. 2, the recovery system 80, 82 of the large drops comprises a first return large drops 80 located near the distal edge 16 and a second return 82 large drops 82 located near the proximal edge 14 of the reservoir primary 10. The large drop returns 80, 82 are in fluid communication with the primary reservoir 10, which allows the fluid coming from the nebulization chamber 50 to directly reach the primary reservoir 10 by gravity without having to use additional pipes . For example, the large drop returns 80, 82 may consist of fluidic connections having an enlarged portion at the level of the nebulization chamber 50.

The fluid flows through the recovery system 80, 82 of the large drops with a flow rate of approximately 1 L / min (liter per minute). Once the large droplets have reached the primary reservoir 10, they return to the fluid supply circuit. In this, the fluid movement pump 40, the nebulization enclosure 50 (including the chimney 54), and the primary tank 10 form a closed loop circuit. The route of the fluid within the nebulization system 1 is thus not only optimized but also makes it possible to avoid any loss of fluid.

In other words, the fluid supply system of the nebulization system comprises a primary supply circuit of the nebulization system and a secondary circuit. The primary supply circuit is the standard circuit used by the fine droplets which could have been nebulized and dispersed in the form of mist via the inclined portion 54a of the chimney. The secondary circuit is the circuit used by the largest droplets, which, failing to be able to leave the nebulizer, are returned to the standard circuit to be nebulized.

When the mist of droplets leaves the nebulization chamber 50, it diffuses into the passenger compartment and comes into direct contact with the passengers of the vehicle. When the air in the passenger compartment is hot, some of the micro-droplets diffused in the passenger compartment can also be vaporized in contact with the hot air, before reaching the passengers; which contributes to re-humidification and cooling of the cabin air. In all cases, it is essential to control the concentration of bacteria in the fluid.

In this regard, part of the fluid is caused to stagnate in the primary reservoir 10. In fact, although its volume remains limited, the primary reservoir 10 forms a buffer reservoir for the fluid. The fluid is brought to be stored there for a more or less long period depending on whether the nebulization system is activated or not. However, in the medium term, the primary reservoir 10 being unsterilized, a proliferation of bacteria can be observed at the bottom of said primary reservoir. Clusters, or aggregates, are likely to form there, which gives rise to the formation of a deposit of mud, conventionally called "vase" or "bio-film" at the bottom of the tank. In this, the bottom of the primary reservoir represents an area where the concentration of bacteria is particularly high. In addition, such a concentration of bacteria represents a source of bacteria for the entire nebulization system.

It is therefore necessary to limit the bacterial proliferation by directly treating at least the fluid contained in the primary reservoir 10 and, preferably, the entire reservoir, that is to say, the liquid and the air which it contains as well as its internal surfaces.

In this regard, the supply system according to the invention comprises a generator 72 of ultraviolet radiation located on the primary reservoir 10 so as to eliminate the bacteria present in the fluid contained in said primary reservoir 10. In this configuration, said generator 72 is localized so that the ultraviolet radiation emitted can directly treat the content of the primary reservoir 10, that is to say the fluid to be nebulized, in particular the portion located at the bottom of the reservoir but also the air contained in a sky of the tank, the top of the tank being the upper part of the tank which is free of fluid, as well as the internal surfaces of the tank. The exposure of bacteria contained in the primary reservoir 10 to the radiation of the generator 72 eliminates them and significantly limits any possibility that they multiply or even proliferate.

Very advantageously, the generator 72 of ultraviolet radiation consists of a photolysis reactor with light-emitting diodes 74 emitting between 100 and 280 nm. However, the share of effective radiation, that is to say the share of radiation that eliminates bacteria is between 200 and 280 nm. However, the radiation source 74 can emit between 280 and 400 nm even if the performance is lower in terms of the proportion of bacteria eliminated.

Light emitting diodes 74 are sources with many advantages. They have low consumption, operate on DC supply voltage and do not cause electromagnetic compatibility problems, which facilitates their integration into the system. They also have small dimensions which keeps a compact system. In addition, they do not require the use of mercury and have a long service life, which is an advantage for recycling and maintenance issues.

As illustrated in the embodiment of Figure 3, the generator 72 of ultraviolet radiation is advantageously substantially planar. The term “substantially planar” is understood to mean that said generator 72 has a small thickness along an axis Z, and that it has suitable dimensions along the longitudinal axis X and a transverse axis Y. In such a configuration, the generator 72 can easily be integrated into an empty space between the nebulizer and the primary reservoir 10 even in the event that the volume available around said reservoir is limited.

Advantageously, the generator 72 of ultraviolet radiation comprises a flange 77. The flange 77 consists of a part of revolution of generally circular shape. It has an essentially hollow interior volume. It supports an internal body 75 on which the light-emitting diodes 74 are mounted by means of a printed circuit board. Said internal body 75 is here closed by a window 90, in particular made of quartz. The whole of said card and said diodes is, for example, embedded in the internal body 75 using a thermally conductive resin. Said internal body 75 is advantageously capable of dissipating the calories emitted by the diodes. It is, for example, made of stainless steel.

If the power of the light-emitting diodes and the heat to dissipate require it, said flange 77 can be configured to allow cooling of said diodes by a circulation of fluid. For this, in the example illustrated, said puddle 77 forms an internal path comprising an inlet 77a and an outlet 77b at the periphery of the internal body 75. In other words, the internal path extends angularly around the internal body 75 It is further delimited by a side wall of the flange 77. The fluid traversing said internal path advantageously comes from the supply circuit of the nebulization system.

Thus, preferably, the internal body75 delimits an internal channel 76. The channel 76 allows the circulation of the fluid through said internal body 75 and thus makes it possible to take advantage of the fluid circulating in the flange 77 for the cooling of the light-emitting diodes 74 mounted on said internal body. This is made possible because the generator 72 of ultraviolet radiation is advantageously in fluid communication with the fluid supply system of the nebulizer.

In addition, the flange 77 is provided with means of attachment 78 to orifices 7 located on the primary reservoir 10. In the embodiment illustrated in FIG. 3, it can be seen that the flange 77 forms on an external contour of its wall lateral a shape having a groove allowing said flange 77 to be snapped-on on an inner edge of the orifice 7. This means of fixing the generator 72 of ultraviolet radiation on the primary reservoir 10 is not, however, limiting. In this sense, alternatively or in addition, the generator 72 may comprise a seal, not illustrated, at the level of said window 90.

The primary tank 10 comprises an upper wall 11, a lower wall 12 and two side walls. As illustrated in FIG. 6a, the orifice 7 can be formed in any one of said walls.

Very advantageously, said generator 72 of ultraviolet radiation is located on the upper wall 11 of the primary reservoir 10. This configuration corresponds to the embodiment illustrated in FIGS. 1, 4 and 5 and that where the generator is, in this case above, in Figure 6a. In FIG. 4, it can be seen that the upper wall includes an orifice 8 for filling and / or one of the large drop returns 80, 82.

In this configuration, the generator 72 of ultraviolet radiation is ideally positioned to allow cooling of the light-emitting diodes 74 by the fluid coming from the secondary circuit. In other words, as appears from what has already been said above, the fluid entering the generator 72 of ultraviolet radiation can advantageously come from the recovery system 80, 82 of the large drops of the nebulizer 50, in particular from one of the returns large drops 80, 82. By positioning the generator 72 of ultraviolet radiation on the primary reservoir 10, the access of the fluid is therefore facilitated since it flows directly, in particular by gravity, from the recovery system 80, 82 of large drops. In addition, the air contained in the sky is treated first, but also the fluid contained in the primary tank 10 and the internal faces of the tank, in particular at the bottom of the tank.

Other configurations are also possible.

The generator 72 of ultraviolet radiation can, as an alternative, be located on one of the side walls of the primary tank 10. Even located on the side walls of the primary tank 10, the generator 72 can benefit, for the purposes of cooling the light-emitting diodes 74 and the treatment of the fluid and the air contained in the primary reservoir 10, the fluid flowing from one of the large drop returns 80, 82 of the recovery system. In this case, it is possible to use additional pipes in order to redirect the fluid to the fluid inlet 77a of the flange. This being the case, this configuration allows a simpler integration of the generator 72. In fact, as can be better seen in FIG. 1, the side walls of the primary reservoir are cleared since, in the present case, the other elements of the nebulization system are not located opposite said walls.

In an alternative configuration to the two configurations described above, the generator 72 of ultraviolet radiation can be located on the bottom wall 12 of the primary reservoir 10 (FIG. 6a). This advantageously makes it possible to treat the bottom of the primary reservoir 10 first, where silt and bacterial proliferation are more likely to occur. Similar to the previous configurations, it is possible to take advantage of the recovery system 80, 82 for large drops. That said, it is also possible to connect the generator 72 to a suction strainer 41 of said pump 40 so that no additional piping would be necessary while allowing its cooling by the circulation of the fluid, as can be seen at Figure 6b. This would also facilitate the installation of said generator 72 of ultraviolet radiation.

Preferably, the internal walls of the primary reservoir 10 are reflective by their material by being made of a reflective material, in particular aluminum or an aluminum alloy, so that the radiation emitted by the generator 72 can diffuse in all the directions of the space inside said primary reservoir 10. This advantageously makes it possible to take advantage of the multiple reflections on the walls to reach all the zones of the primary reservoir 10, even those which are a priori the most difficult to access. This has the advantage of being able to limit the power of the diodes to be used while increasing the efficiency and the response time of the generator. Said reflective material may also be, among other things, polished metals, such as polished stainless steel, or white plastic materials, such as white PTFE or white TABS.

Alternatively, the internal walls of the primary tank are reflective by a surface treatment. Thus, they can have a coating on their inner faces capable of reflecting ultraviolet radiation, in particular aluminum or an aluminum alloy. The use of such a coating produces the same effects on radiation, but may represent a more economical solution compared to walls made entirely of reflective material, for example if it is metal.

In addition, as already said, the power supply system can be equipped with an electronic card 79 electrically connected to light-emitting diodes 74. The electronic card 79 may include one or more control elements and / or connectors to external circuits. It is used for the current supply of said light-emitting diodes 74. Alternatively, a second electronic card, intended for controlling the diodes, can extend at the level of a housing 79a (FIG. 5) formed at the level of the primary reservoir. 10.

The invention is not limited to the embodiments described above and can be applied to fluid supply systems whose primary reservoir has any other form than that described in the present description.

Claims (10)

1. Fluid supply system for a nebulization system (1) for a motor vehicle, said supply system comprising: - a primary reservoir (10) for supplying fluid to a nebulizer (50); - a generator (72) of ultraviolet radiation, the fluid supply system being characterized in that said generator (72) of ultraviolet radiation is located on the primary reservoir (10) so as to eliminate bacteria present at least in the fluid contained in said reservoir. 2. The power supply system according to claim 1, wherein the generator (72) of ultraviolet radiation consists of a photolysis reactor with light emitting diodes (74), configured to generate said radiation. 3. A power supply system according to claim 2, in which the generator (72) of ultraviolet radiation comprises a flange (77), said flange (77) supporting an internal body (75) on which the light-emitting diodes (74) are mounted. . 4. Power system according to claim 3, wherein the internal body (75) is made of stainless steel. 5. Supply system according to one of claims 3 or 4, wherein the internal body (75) defines an internal channel (76) allowing the circulation of the fluid along said internal body (75) so that the fluid flowing said inner channel (76) allows cooling of said diodes (74). 6. Supply system according to any one of the preceding claims, in which said generator (72) of ultraviolet radiation is located on an upper wall (11) of the primary reservoir (10). 7. Supply system according to the preceding claim, in which the primary reservoir (10) comprises, on one of said upper (11), lower (12) or lateral walls, one or more orifices (7) making it possible to accommodate the generator. (72) of ultraviolet radiation, the flange (77) being provided with fixing means (78) to the orifices (7). 8. Supply system according to any one of the preceding claims, comprising a primary circuit for supplying the nebulization system and a secondary circuit, said ultraviolet radiation generator (72) being in fluid communication with the primary circuit and / or 5 secondary. 9. Supply system according to any one of the preceding claims, in which the walls of the primary reservoir (10) are made of a reflective material and / or have a coating on their interior faces capable of reflecting ultraviolet radiation. 10 10. Nebulization system (1) for a motor vehicle comprising: - a fluid supply system according to one of the preceding claims, and - a nebulizer comprising a nebulization enclosure (50) supplied with fluid by the supply system (2).