FR3084597A1 - AIR PURIFICATION DEVICE FOR MOTOR VEHICLE - Google Patents

Abstract

The present invention relates to an air purification device (1) for a motor vehicle (2), according to which it comprises: - a filtration unit (17) comprising: - a water tank (10) comprising: - an inlet ( 100) through which polluted air (A1) can enter; - a tank (101) in which the polluted air (A1) mixes with water to be decontaminated so as to produce purified air (A2); - an outlet (102) through which the purified air (A2) can exit; - an air suction motor (11) configured to: - suck the polluted air (A1) at the inlet of the water tank (10); - diffusing the purified air (A2) to an air outlet (170) of the filtration unit (17); - a main water tank (12) comprising recovery water (E0) and configured to supply said water tank (10).

Description

Air purifying device for motor vehicle

TECHNICAL FIELD OF THE INVENTION

The present invention relates to an air purification device for a motor vehicle.

It finds a particular, but not limiting, application in motor vehicles.

TECHNOLOGICAL BACKGROUND OF THE INVENTION

An air purifying device for a motor vehicle, known to a person skilled in the art, comprises a cabin air filter for ensuring the quality of the cabin air in said motor vehicle.

A cabin air filter has different filter layers, including an activated carbon filter, a cotton filter and a water filter in order of passage.

In this context, the present invention aims to propose an air purification device for an alternative motor vehicle in the state of the prior art.

GENERAL DESCRIPTION OF THE INVENTION

To this end, the invention provides an air purification device for a motor vehicle, according to which said air purification device comprises:

- a filtration unit comprising:

- a water tank including:

- an entrance through which polluted air can enter;

- a tank in which the polluted air mixes with water to be decontaminated so as to produce purified air;

- an outlet through which the purified air can exit;

- an air intake motor configured for:

- suck up the polluted air at the inlet of the water tank;

- distribute the purified air to an air outlet of the filtration unit;

- a main water tank comprising recovery water and configured to supply said water tank.

Thus, by mixing with water thanks to swirls created by the air suction motor, the polluted air is freed from the dust and pollen which constitutes it, the latter being retained in the water tank. The main water tank allows water to be brought into the water tank from the recovery water from the motor vehicle.

According to nonlimiting embodiments, said air purifying device for a motor vehicle may further include one or more additional characteristics among the following:

According to a nonlimiting embodiment, the polluted air comes from the passenger compartment of the motor vehicle.

According to a nonlimiting embodiment, the polluted air comes from outside the motor vehicle.

According to a nonlimiting embodiment, the purified air is diffused in the passenger compartment of the motor vehicle.

According to a nonlimiting embodiment, the polluted air comes from the passenger compartment of the motor vehicle or from the exterior of the motor vehicle, and the purified air is diffused in said passenger compartment.

Thus, the air purification device makes it possible to purify the air in the passenger compartment of the motor vehicle.

According to a nonlimiting embodiment, the air purification device further comprises:

- suction pipes connected to an air inlet of the filtration unit in which the polluted air can circulate;

- diffusion pipes connected to the outlet of the water tank in which the purified air can circulate.

According to a nonlimiting embodiment, the suction pipes make it possible to recover the polluted air from the passenger compartment of the motor vehicle and the diffusion pipes allow the purified air to be distributed in the passenger compartment.

According to a nonlimiting embodiment, said air purification device further comprises a water filtration tank:

- connected to said water tank to supply it with filtered water; and

- connected to said main tank to be supplied with recovery water. This allows clear water, that is to say without impurities, to be brought to the water tank.

According to a nonlimiting embodiment, said air purification device also comprises at least one air filter.

This purifies the air of particles that could not be filtered in the water of the water tank.

According to a nonlimiting embodiment, said air purification device is activated:

- according to a predefined number of uses of the motor vehicle; and or

- when the motor vehicle is not in use.

This regularly purifies the stale air from the passenger compartment.

According to a nonlimiting embodiment, the water tank comprises a drain valve and said air purification device further comprises an electronic control unit configured to control the opening of said drain valve for automatic draining of said water tank.

This allows the water tank to be emptied as soon as the water it contains is too cloudy. Thus, there will always be enough clear water in the water tank to purify the polluted air arriving in said water tank.

According to a nonlimiting embodiment, said air purification device further comprises a box for grouping polluted air.

This means that there is only one air inlet for the filtration unit and therefore only one air inlet for the water tank.

According to a nonlimiting embodiment, the air purification device is coupled with a heating, ventilation and / or air conditioning device.

This makes it possible to use the ducts of the heating, ventilation and / or air conditioning device to bring the purified air to the aerators of the motor vehicle and therefore into the passenger compartment.

According to a nonlimiting embodiment, said air purification device is disposed at the front of the motor vehicle at its hood.

This allows you to be close to the passenger compartment of the motor vehicle and thus have short air circulation circuits.

BRIEF DESCRIPTION OF THE FIGURES

The invention and its various applications will be better understood on reading the description which follows and on examining the figures which accompany it:

- Figure 1 shows a diagram of an air purification device for a motor vehicle comprising a filtration unit with a water tank and an air suction motor, and a main water tank, according to a first non-limiting embodiment of the invention;

- Figure 2 shows a diagram of an air purification device for a motor vehicle comprising a filtration unit with a water tank and an air suction motor, and a main water tank, according to a second non-limiting embodiment of the invention;

- Figure 3 shows a top view of the air purification device of Figure 2, integrated in a motor vehicle, according to a non-limiting embodiment;

- Figure 4 shows a first perspective view of the air purification device of Figure 3, according to a non-limiting embodiment;

- Figure 5 shows a second perspective view of the air purification device of Figure 3, according to a non-limiting embodiment;

- Figure 6 shows a schematic sectional view of the filtration unit of the air purification device of Figures 2 to 5, according to a non-limiting embodiment.

DESCRIPTION OF EMBODIMENTS OF THE INVENTION

Identical elements, by structure or by function, appearing in different figures keep, unless otherwise specified, the same references.

The air purification device 1 for a motor vehicle 2, according to the invention is described with reference to Figures 1 to 6.

By motor vehicle is meant any type of motor vehicle.

As illustrated in FIGS. 1 to 6, the air purification device 1 comprises:

- a filtration unit 17 comprising:

- a water tank 10;

- an air suction motor 11;

- a main water tank 12.

In a nonlimiting embodiment, the air purification device 1 also comprises a water filtration tank 15.

In a nonlimiting embodiment, the air purification device also comprises at least one air filter 16.

In a nonlimiting embodiment, the air purification device further comprises a grouping box 18 for the polluted air.

The elements of the air purification device 1 are described in detail below.

• BQÎtjer de.fjjtratjon.17

The filtration unit 17 is illustrated in FIGS. 1 to 6.

The filtration unit 17 includes:

- said water tank 10;

- said air suction motor 11;

- an air outlet 170;

- an air inlet 171;

- A chamber 172 in which is housed said air suction motor 11. Chamber 172 adjoins said water tank 10. It is disposed between the water tank 10 and the air outlet 170.

The filtration unit 17 is waterproof. It prevents the polluted air A1 from escaping. It also prevents the purified air E1 from escaping except via the air outlet 170.

O Water tank. 10

The water tank 10 is coupled to the main water tank 12 so that the latter supplies it with water.

In a first nonlimiting embodiment illustrated in FIG. 1, it is directly coupled to the main tank 12.

In a second nonlimiting embodiment illustrated in FIG. 2, it is indirectly coupled to the main tank 12 via the water filtration tank 15 described below.

As illustrated in FIGS. 1, 2 and 6, the water tank 10 comprises:

- an inlet 100 through which polluted air A1 can enter;

- a tank 101 in which the polluted air A1 mixes with water to be decontaminated so as to produce purified air A2;

- an outlet 102 through which the purified air A2 can exit.

As illustrated in the figures, its inlet 100 extends the air inlet 171 from the filtration unit 17.

In a nonlimiting embodiment, suction pipes 13 (illustrated in FIGS. 3 to 5) are connected to the air inlet 171 of the filtration unit 17 in which the polluted air A1 can circulate and pipes diffusion 14 are connected to the air outlet 170 in which the purified air A2 can circulate.

In a first embodiment not shown, the suction pipes 13 and the diffusion pipes 14 are connected directly to the air inlet 171 and to the air outlet 170 respectively.

In a second variant embodiment illustrated in FIGS. 3 to 5, they are indirectly connected via the grouping box 18 and the air filter 16 respectively described below.

In a nonlimiting embodiment illustrated the polluted air A1 comes from the passenger compartment H of the motor vehicle 2 and the purified air A2 is diffused in the passenger compartment H. This embodiment is taken as a nonlimiting example in the following. the description. In a nonlimiting example, the air volume of the passenger compartment H to be purified is approximately 5m ³ .

In a nonlimiting embodiment, the air purification device 1 is coupled to a heating, air conditioning and / or ventilation HVAC device "Heating Ventilation and Air-Conditioning" in the English language, also called HVAC device. This makes it possible to connect the diffusion tubes 14 to the ventilation ducts 24 of the HVAC device.

In a nonlimiting embodiment illustrated in FIGS. 4 and 5, the suction pipes 13 are the air ducts for the aerators 21 of the motor vehicle 2 located on the ground for the suction of the polluted air A1. In a nonlimiting example illustrated in FIGS. 4 and 5, suction pipes 13 are connected to two aerators 21 before situated on the ground. In a nonlimiting example illustrated in FIG. 5, suction pipes 13 are connected to two rear aerators 21 located on the ground. Thus, this allows the polluted air A1 to be drawn from the passenger compartment at the front and at the rear of the motor vehicle 2.

In a nonlimiting embodiment illustrated in FIGS. 4 and 5, the diffusion tubes 14 are connected to the ventilation ducts 24 of the aerators 22 located at the dashboard 23 for the diffusion of the purified air A2. In a nonlimiting example illustrated in FIGS. 4 and 5, diffusion tubes 14 are connected to the ventilation ducts 24 leading to four aerators 22, including two central aerators and two lateral aerators. This allows the purified air A2 to be well distributed in the passenger compartment 20.

As illustrated in FIGS. 3 to 5, the air purification device 1 is arranged at the front of the motor vehicle 2 at its hood. Thus, it is easy to connect the suction tubes 13 and the diffusion tubes 14 to the aerators 21, 22 of the motor vehicle 2 (via the ventilation ducts 24 of the HVAC device for the diffusion tubes 14).

In a nonlimiting embodiment illustrated in FIG. 6, the water tank 10 further comprises:

- A primary baffle 105 in the tank 101 disposed at the outlet 102;

- a secondary baffle 106 in the tank 101 disposed at the level of the inlet 100, at the place where the polluted air A1 arrives in the tank 101.

These two baffles 105 and 106 prevent the water in the tank 101 from going up to the air filter 16 described below and to the air suction motor 11.

In a nonlimiting embodiment, the water tank 10 is configured to be drained automatically. As soon as the clarity of the water in the water tank 10 is detected to be poor, the water is purged. To this end, the water tank 10 comprises a drain valve 103 illustrated in FIGS. 1, 2 and 7.

The drain valve 103 is configured to be opened for automatic emptying of the water tank 10. For this purpose, the drain valve 103 receives an opening control signal s1 (illustrated in FIGS. 1 and

2) sent by an ECU electronic control unit described below. In a nonlimiting embodiment illustrated in FIG. 7, the drain valve 103 comprises a return spring 1030 configured to close the drain valve 103 automatically without passing through the electronic control unit ECU. In a nonlimiting example, stopping the reception of the opening control signal by the drain valve

103 allows the return spring 1030 to close said drain valve 103.

In a nonlimiting embodiment, the water tank 10 comprises a turbidity sensor 105 (illustrated in FIGS. 1 and 2) used to detect the degree of soiling of the water.

ο Air intake motor. 11.

The air suction motor 11 is illustrated in FIGS. 1, 2 and 6.

The air suction motor 11 is arranged in the chamber 172 of the filtration unit 17. It is located between the water tank 10 and the air outlet 170 of the filtration unit 17.

The air intake motor 11 is configured for:

- suck the polluted air A1 at inlet 100 of said water tank 10;

- diffusing the purified air A2 to an air outlet 170;

The air suction motor 11 allows by its suction to produce water vortices T (illustrated in Figures 1,2 and 6) in said water tank 10 so that the polluted air A1 mixes with l water from said water tank 10.

The polluted air A1 is sucked in by the air suction motor 11 and passes through the water vortices T so that the particles it contains, such as dust and pollen, are retained in the water tank 10. The air discharged at the outlet 102 from the water tank 10, called purified air A2, is cleaned of its impurities.

The purified air A2 which leaves the water tank 10 is also sucked in by the air suction motor 11 and is discharged towards the air outlet 170 so that it can be diffused in the passenger compartment 20 .

It will be noted that depending on the power of the air suction motor 11, the pollution of the polluted air A1 is more or less rapid. Thus, in nonlimiting examples, if the power is 1200Watts, the pollution control will be approximately 3 minutes and if the power is 150Watts, the pollution control will be approximately 15 minutes.

It will be noted that in the nonlimiting embodiment where the air purification device 1 is coupled to the HVAC device, the purified air A2 circulates in the ventilation ducts 24 of the HVAC device and the HVAC device can thus help to draw purified air A2. Indeed, upstream of the air outlet 170, the purified air A2 will circulate in the diffusion pipes 14 as far as the ventilation ducts 24 and finally leave the aerators 22. The HVAC device makes it possible to draw the air purified A2 via the aerators 22 in the passenger compartment 20. The purified air A2 is thus pulsed as a function of a selected power of the HVAC device. The power selected is manual or automatic, the HVAC device comprising, in a manner known to those skilled in the art, an air blower (not shown).

Thus, the purified air A2 is pulsed:

- via the air suction motor 11; and or

- via the air blower of the HVAC device.

It will be noted that in a nonlimiting embodiment, the power of the air suction motor 11 is lower than the power of the air blower of the HVAC device.

It should be noted that the use of only the air suction motor 11 allows energy saving.

In a nonlimiting embodiment, said air purification device 1 is activated:

- according to a number of predefined uses N1 of the motor vehicle 2; or

- when the motor vehicle 2 is not used;

Activation of the air purification device 1 comprises starting the air suction motor 11. Thus, a suction cycle can be triggered as a function of a predefined number of uses N1 of the motor vehicle 2, or when the motor vehicle 2 is not used.

In a nonlimiting example, N1 is between 3 and 5.

In nonlimiting embodiments, it is detected that the motor vehicle 2 is not used:

- when it returns to its storage site, for example in the case of autonomous motor vehicles;

- during maintenance;

- via a seat sensor;

In a nonlimiting embodiment, the air purification device 1 is activated via an activation command. In a non-limiting variant, the activation command is carried out via a Smartphone.

In the case where the air purification device 1 is coupled to the HVAC device and the latter is already activated and therefore its air blower is already running, in a non-limiting embodiment, the power of its blower air can be increased to purify the air in the passenger compartment 20:

- after a number of predefined uses N1 of the motor vehicle 2;

- if the air in the passenger compartment 20 is detected as being polluted.

It will be noted that the detection of the air in the passenger compartment 20 as being contaminated can be done by means of a pollution sensor placed in the passenger compartment 20.

• Main.reservoir.of water.1.2

The main water tank 12 is illustrated in Figures 1 to 5.

It is configured to supply the water tank 10.

In a nonlimiting embodiment, the main water tank 12 is disposed at the level of the base of the motor vehicle 2.

In a nonlimiting embodiment, it comprises a volume of approximately 60 liters.

The main water tank 12 comprises recovery water E0 from a liquid vehicle recovery system (not shown). The recovered liquid is, in nonlimiting examples, the liquid flowing on the motor vehicle coming from the roof or from the sidewalls for example, the liquid which is on the roadway and which is projected by the wheels of the motor vehicle 2 etc. The liquid recovered is thus rainwater and groundwater. The recovered liquid is then used for cleaning the windshield, the windows or even various sensors present in motor vehicles. Since such a liquid recovery system is known to a person skilled in the art, it is not described here.

In a first embodiment illustrated in FIG. 1, the main water tank 12 directly feeds the water tank 10. It is thus connected directly to the water tank 10 via a conduit 120. In this case, the main tank 12 includes a pump 122 (illustrated in the figure

1) which sucks the recovery water E0 in the main water tank 12 and sends it to the water tank 10.

In a second embodiment illustrated in Figures 2 to 5, the main water tank 12 indirectly feeds the water tank 10 via the water filtration tank 15. It is thus connected to the water filtration tank 15 via a conduit 121 (illustrated in Figures 2 and 5). In this case, the main water tank 12 comprises a pump 122 (illustrated in FIG. 2) which sucks up its recovery water E0 and sends it to the water filtration tank 15 and the latter also includes a pump 152 (illustrated in FIG. 2) which draws its filtered water E1 and sends it to the water tank 10, or it is the water tank 10 in place of the water filtration tank 15 which comprises a pump (not illustrated) to draw the filtered water E1 from the water filtration tank 15.

In a nonlimiting embodiment, the water supply to the water tank 10 is done automatically after the water tank 10 has been drained. In this case, in nonlimiting embodiments, the water supply to the water tank 10 is a function of a water level sensor in its tank 101 or of a pump time. Thus, the tank 101 of the water tank 10 is filled with a given level of water.

• RésefYpjr.de.filtration d'eau.15

The water filtration tank 15 is illustrated in Figures 2 to 5.

It makes it possible to filter the recovery water E0 coming from the main water tank 12 and to supply filtered water E1 to the water tank 10. Thus, clear water arrives directly in the water tank 10.

In fact, as the recovery water EO comes from liquid flowing from the motor vehicle 2 and from the road, it is dirty.

The water filtration tank 15 is:

- Connected to said water tank 10 to supply it with filtered water E1 via a conduit 151 illustrated in Figures 2 and 3; and

- connected to said main water tank 12 to be supplied with EO recovery water via the conduit 121 (illustrated in Figures 2 and 5).

In a nonlimiting embodiment, the water filtration tank 15 comprises a pump 152 which draws its water and sends it into the water tank 10.

In a nonlimiting embodiment, the water filtration tank 15 has a greater volume capacity than the tank 101 of the water tank 10.

In nonlimiting embodiments, the water filtration tank 15 can comprise a filter, a filter cartridge, an additive or any other element or device designed to treat the recovery water E0 coming from the main water tank 12 .

In a nonlimiting example, the filter can be a filter retaining the hydrocarbons or oils which can be mixed with the recovery water E0 and which it is desired to eliminate. In a nonlimiting embodiment, the filter is disposed at the outlet of the conduit 151.

The additive treats E0 recovery water, in particular to prevent foaming or the proliferation of bacteria. In nonlimiting examples, it can thus be an anti-foaming additive, antibacterial, an alcohol.

• Filter at.Jr.16

Said at least one air filter 16 is illustrated in FIGS. 2 to 6.

In a first nonlimiting embodiment illustrated in FIGS. 2 and 6, the air filter 16 is disposed in the filtration unit 17 upstream of the air suction motor 11, at the outlet 102 of the tank water 10. In a non-limiting alternative embodiment, the air filter 16 is a foam filter.

In a second nonlimiting embodiment illustrated in FIGS. 3 to 5, the air filter 16 is arranged downstream of the water tank 10, outside the filtration unit 17. It is connected to the air outlet 170 of the filtration unit 17 via a conduit 160 (illustrated in FIG. 3) and to the diffusion tubes 14. This second mode makes it possible to have a single conduit 160 at the outlet of the filtration unit 17 instead of 4 tubes corresponding to the four tubes diffusion 14. For reasons of simplification, the conduit 160 is not illustrated in FIG. 2.

In nonlimiting variant embodiments, the air filter 16 is an active carbon, particulate, combined filter, or a very high efficiency HEPA “High Efficiency Particulate Air” filter in the English language. It filters particles in the purified air A2 that have not been removed in the water tank 10, such as gas particles for example.

Note that it is possible to have a combination of the two nonlimiting embodiments.

Thanks to these different air filters 16 complementary to the filtration by the filtration unit 17, the filtration of the air is improved and a purified air A2 is obtained, cleaned of all impurities.

• BQÎtjej.de.regrpupement.18

The grouping box 18 is illustrated in FIGS. 2 to 5.

The grouping box 18 is configured to group the polluted air A1 coming from the passenger compartment 20. It is connected:

- the suction pipes 13 for recovering the polluted air A1 from the passenger compartment 20; and

- to the filtration unit 17 via a conduit 181 (illustrated in FIG. 3) for bringing the polluted air A1 to the inlet 171 of the filtration unit 17.

For reasons of simplification, the conduit 181 is not illustrated in FIG. 2.

Thus, a single conduit 181 arrives on the filtration unit 17 and a single inlet 171 is necessary and therefore a single inlet 100 for the water tank 10 is necessary. This allows greater filtration efficiency compared to a filtration unit 17 which would have four inlets 171 (corresponding to the four suction pipes 13) and therefore a water tank 10 with four inlets.

• Unjté.de electronic control ECU. And. Communication module. MOD In a nonlimiting embodiment illustrated in FIGS. 1 and 2, the air purification device 1 further comprises:

- an ECU electronic control unit; and

- a MOD communication module.

The ECU electronic control unit is configured for:

- activate the automatic start-up of the air suction motor 11;

- Activate the automatic emptying of the water tank 10. To this end, it is configured to control the opening of the drain valve 103 of the water tank 10 via an opening control signal s1 (illustrated in the figures 1 and 2) ;

- detect that the motor vehicle 2 is not in use.

In a nonlimiting embodiment, the electronic control unit ECU is further configured to deactivate the automatic emptying of the water tank 10. For this purpose, it is configured to control the closing of the emptying valve 103 of the water tank 10 via a closing control signal s2 (illustrated in Figures 1 and 2). This nonlimiting embodiment applies if the drain valve 103 does not include a return spring 1030.

In nonlimiting embodiments, the electronic control unit ECU is configured for:

- define the pump time to fill the water tank 10;

- activate the various pumps 122, 152 of the air purification device 1;

- increase the power of the air blower of the HVAC device;

- adjust the power of the air intake motor 11.

The MOD communication module is configured for

- receive an activation command from a Smartphone in a nonlimiting example and send it to the electronic control unit ECU. The communication protocol used is the Bluetooth Low Energy ™ protocol in a non-limiting embodiment;

- receive the water level in the water tank 10 via the water level sensor and send it to the ECU electronic control unit.

Of course, the description of the invention is not limited to the embodiments described above.

Thus, in another nonlimiting embodiment, the aerators 22 of the dashboard 23 can also be taken into account for the suction of the polluted air A1.

Thus, in a nonlimiting embodiment, the main water tank 12 can also include any element or device designed to treat the recovery water E0.

Thus, in a nonlimiting embodiment, the water filtration tank 15 can include fragrances or essential oils which, mixed with the purified air A2, can be diffused in the passenger compartment 20.

Thus, in another nonlimiting embodiment, the polluted air A1 can come from outside the passenger compartment 20 and not from the passenger compartment 20. In this case, the suction pipes 13 would be connected to air inlets configured to receive outside air. The polluted air A1 from the outside is thus decontaminated so as to produce purified air A2 which is diffused in the passenger compartment

20.

Thus, the invention described has the following advantages in particular:

- It allows for automatic air pollution control of the passenger compartment 20;

- It makes it possible to have effective air pollution control in the passenger compartment 20;

- It allows the use of EO recovery water for the supply of the water tank 10, which saves in terms of water consumption;

- it makes it possible to offer a solution for cleaning the air in the passenger compartment

20 for fleets of motor vehicles.

Claims (10)

1. Air purifying device (1) for a motor vehicle (2), according to which said air purifying device (1) comprises: - a filtration unit (17) comprising: - a water tank (10) comprising: - an inlet (100) through which polluted air (A1) can enter; - a tank (101) in which the polluted air (A1) mixes with water to be decontaminated so as to produce purified air (A2); - an outlet (102) through which the purified air (A2) can exit; - an air intake motor (11) configured for: - suck the polluted air (A1) at the inlet of the water tank (10); - diffusing the purified air (A2) to an air outlet (170) of the filtration unit (17); - a main water tank (12) comprising recovery water (E0) and configured to supply said water tank (10). 2. An air purification device (1) according to claim 1, according to which the polluted air (A1) comes from the passenger compartment (H) of the motor vehicle (2) or from the outside of the motor vehicle (2). , and the purified air (A2) is diffused in said passenger compartment (H). 3. Air purifying device (1) according to any one of the preceding claims, according to which the air purifying device (1) further comprises: - suction pipes (13) connected to an air inlet (171) of the filtration unit (17) in which the polluted air (A1) can circulate; - diffusion pipes (14) connected to the air outlet (170) in which the purified air (A2) can circulate. 4. Air purification device (1) according to any one of the preceding claims, according to which said air purification device (1) further comprises a water filtration tank (15): - connected to said water tank (10) to supply it with filtered water (E1); and - connected to said main water tank (12) to be supplied with recovery water (E0). 5. An air purifying device (1) according to any one of the preceding claims, wherein said air purifying device (1) further comprises at least one air filter (16). 6. Air purification device (1) according to any one of the preceding claims, according to which said air purification device (1) is activated: - according to a predefined number of uses (N1) of the motor vehicle (2); and or - when the motor vehicle (2) is not used. 7. Air purifying device (1) according to any one of the preceding claims, according to which the water tank (10) comprises a drain valve (103) and according to which said air purifying device (1) further includes an electronic control unit (ECU) configured to control the opening of said drain valve (103) for automatic draining of said water tank (10). 8. Air purifying device (1) according to any one of the preceding claims, according to which said air purifying device (1) further comprises a unit for grouping (18) the polluted air (A1). . 5 9. Air purification device (1) according to any one of the preceding claims, according to which the air purification device (1) is coupled with a heating, ventilation and / or air conditioning (HVAC) device. 10. Air purification device (1) according to any one of 10 previous claims, according to which the air purification device (1) is arranged at the front of the motor vehicle at its hood.