WO2021259951A1

WO2021259951A1 - Apparatus for treating air and interior surfaces of premises, comprising a turbine and a tank of decontaminating liquid composition for mixing with the air to be treated that is drawn in by the turbine

Info

Publication number: WO2021259951A1
Application number: PCT/EP2021/067039
Authority: WO
Inventors: Alain HILAIRE
Original assignee: Hilaire Alain
Priority date: 2020-06-22
Filing date: 2021-06-22
Publication date: 2021-12-30
Also published as: FR3111569A1

Abstract

The invention relates to an apparatus, the components of which have the function of first cleaning the air by ionization and/or filtration and of then mixing this disinfected air with droplets of a liquid decontaminating substance, either by bringing the cleaned air into contact with a free surface of the substance, or by means of an atomizer.

Description

Title: Device for treating the air and the interior surfaces of a room comprising a turbine and a reservoir of decontaminating liquid composition for mixing with the air to be treated sucked in by the turbine.

Technical area

The present invention relates to the field of air purification and interior and exterior surfaces, the air being liable to contain in suspension all types of pollution, contamination, bacterial, chemical, particulate, such as fungi and spores, volatile organic compounds (VOCs), and formaldehydes, particles PM 10 and PM 2.5 ...

The present invention aims to improve existing air purifiers, particles and aerosol cleaners, in particular in order to reduce their manufacturing and operating costs while ensuring constant and lasting efficiency over time. Although described with reference to an air purification application, the invention is applicable to any cleaning of aerosols, microorganisms and particles.

Prior art

The quality of the air inside buildings is a public health issue in France and around the world, of which the population is increasingly aware.

Indeed, the indoor environment offers a great diversity of exposure situations to many physical agents and particulate, chemical or microbiological contaminants, the consequences of which on health vary in particular according to the nature of the pollutants, contaminants, the characteristics of the exposures, ...

Different sources can be at the origin of the presence of pollutants in indoor air: sources specific to the building, its environment, its equipment or the behavior of its occupants.

In France, provisions exist in the Environmental, Construction and Public Health Codes, which define the policy for the quality of indoor air. To reduce exposure to indoor air pollutants, current government recommendations focus on limiting emissions at source, ventilation and ventilation.

In recent years, the indoor air cleaning market has been developing with the marketing of equipment claiming indoor air cleaning properties. in the form of stand-alone devices, as well as construction and decoration materials highlighting their depolluting properties.

These devices and products are intended for the entire population, but may particularly target sensitive or sensitized subjects.

However, the question of their effectiveness and especially that of their harmlessness arises. Air purification is based on two main principles: the trapping of contaminants or their destruction. The techniques implementing these two main principles are integrated into stand-alone devices or heating, ventilation, air conditioning systems (HVAC acronym for "Heating, ventilation, air conditioning").

With regard to the trapping of contaminants, many air filtration techniques intended to address the growing problem of air pollution have been developed, in particular for the industrial sector. The general principle of filters is to recycle the air by sucking in, filtering and then rejecting the air thus purified of its pollutants.

In order to trap particles or dust, mention may in particular be made of mechanical filters, hydraulic filters, filters with filter layers, electric filters: [1]

Usually, there are several filters arranged one after the other in the flow of air to be filtered. A single filter grouping together different functional layers can also be implemented.

Electric filters, also known as electrostatic precipitators names, electrostatic filters and electrostatic precipitators (ESP acronym for "Electrostatic Precipitator") are filtration methods used since the early 20 ^th century to purify fumes including facilities industrial (iron and steel industry, waste incineration, cement factories, energy production units, etc.).

Precipitation or electrostatic collection is a method of choice which allows the collection of aerosol particles for a wide size range.

One type of air purifier or aerosol scrubber may include an ionizer and downstream an electrostatic precipitator / collector.

Ionization is the transformation of an atom or an electrically neutral molecule into an ion, by the loss or gain of one or more electrons.

Electrostatic precipitation consists in precipitating particles previously charged from the air by the ionizer on electrodes carrying an electrical charge opposite to that of the ionized particles. Particles of opposite charges can also attract each other and form heavier particles that will settle on surfaces more quickly.

There are several methods of ionizing an atom or a molecule. We distinguish for example ionization by electronic impact according to which a beam of accelerated electrons encounters an atom or a molecule and tears off one or more electrons during the impact, and ionization by the action of radiation which consists in subjecting a atom or a molecule to the action of a radiation of sufficiently energetic wavelength to eject a peripheral electron.

The ionizer aerosol scrubbers most often implement ionization processes by electronic impact, either by corona discharge (corona effect) and or by dielectric barrier discharge (BDD). If the particles are the main target of G ionization, an action on the gas molecules can also be observed. The interactions between volatile organic compounds (VOCs) and radicals formed during the generation of ions lead to a series of chemical chain reactions which should lead to mineralization when the reaction is complete.

An ionizer as such does not destroy the precipitated particles which must therefore be sucked up by another means, otherwise they run the risk of returning to the room where G ionizer is located.

In addition, studies have shown that some ionizers produce ozone pollution, which even in very small amounts is very harmful to health, causing chest pain, asthma and difficulty breathing. These devices are considered dangerous to health, in particular by the United States Environmental Protection Agency.

The main techniques for oxidizing or destroying contaminants can be reduced to the use of plasma, ozonation or the implementation of photocatalysis.

The formation of a plasma (gas composed of a mixture of neutral particles, positive ions and free electrons) is obtained when a gas is subjected to a strong electric field, to an intense electromagnetic field or to at sufficiently high temperatures, or when bombarded by particles. This results in ionization of the gas. When this is large enough for the number of electrons per unit volume to be comparable to that of molecules, the gas then becomes a very conductive fluid called plasma. In the field of indoor air purification, it is the technology of "cold" plasma or non-thermal plasma, that is to say when the average temperature of the gas is close to the initial temperature, which is used to generate active species, such as free radicals, which are able to oxidize certain pollutants in the air. Air purification by ozone is based on the emission into the air of ozone by ozone generators or ozonators. The ozone (O ₃ ) molecule, very reactive and relatively unstable, has a natural tendency to decompose into dioxygen (O ₂ ) and atomic oxygen (O) which will react with other chemical compounds until they decompose. This ability to easily give up an oxygen atom gives it a very strong oxidizing power. The technique of purification by ozonation is based on this property of ozone to be able to generate decomposition reactions.

The principle of photocatalysis is based on the decomposition of molecules by a succession of chemical reactions, until mineralization, following the activation of a catalyst by light radiation of sufficient energy.

Thus, in a simplified manner, the principle of photocatalysis is based on an electronic process which occurs on the surface of a catalyst, which is often titanium dioxide (T1O ₂ ) because of its low cost and its high performance.

When the catalyst is subjected to radiation of sufficient light intensity, charges are created on the surface thereof. Successive oxy-reductions reactions then take place between the molecules adsorbed on the photocatalyst and these charges until, in theory, complete mineralization of the organic pollutant into water and carbon dioxide (CO ₂ ). Reactive oxygen derivatives (OH, O ₂ , H ₂ O _2, etc.) also form, which contribute to the degradation of organic pollutants.

Other air purification techniques exist such as biological filtration (biofiltration) or ultraviolet.

Biofiltration is based on the ability of certain microorganisms to metabolize pollutants. However, it has not yet been implemented for the purification of indoor air. Ultraviolet rays can have a germicidal action and a photocatalytic action on VOCs. Their commercial application today relates mainly to the elimination of microbial aerosols, however this technology is only identified in a few devices. Finally, sprays have already been used to clean indoor air. Two types of products have been identified: the sprayed products are based on essential oils or other active substances which can have an action (bactericide, virucide, fungicide, acaricide and insecticide) against bio contaminants of indoor air, and deodorants which claim to neutralize odors, beyond masking, without the principle being however well defined.

All the aforementioned devices, of varying costs, are exclusively dedicated to air purification and they do so with varying degrees of efficiency and danger.

They are not really designed to perform the actual treatment of interior surfaces of a room, especially walls and ceilings.

For these interior surfaces, few techniques have been implemented so far. Of course, the treatment of floors by suction is widespread.

Steam cleaners have also appeared.

It is also known to incorporate particles with photocatalytic properties in construction or decoration materials such as glazing, paints, tiles, etc.

Manufacturers are also developing coating materials which exhibit at least one bactericidal, virucidal, fungicidal, acaricidal or insecticidal action. In particular, the French company Serge Ferrari very recently announced that it had developed composite membranes incorporating silver particles that very significantly reduce the viral load of a virus such as Covid-19. Other companies have indicated that they have produced a virucidal varnish to be applied to printed papers.

All these solutions can be effective but at a very high price, and are therefore exclusively dedicated to the treatment of interior surfaces without really worrying about the treatment of the interior air before its contact with said surfaces.

There is a need to further improve the existing devices, in particular in order to provide an efficient and inexpensive solution which can achieve the treatment both of the air inside a room and of its interior surfaces.

The general aim of the invention is then to respond at least in part to this need.

Disclosure of the invention

To do this, the invention firstly relates to a first alternative, an air treatment device and the interior surfaces of a room, comprising:

- an aeraulic envelope comprising: an inlet orifice for the air to be treated, an outlet for the treated air, a duct comprising a converging part and a diverging part downstream of the converging part, the duct being shaped to create a venturi effect by passage a flow of air to be treated through the duct, the inlet orifice being connected to the converging part of the duct while the outlet orifice is connected to the diverging part of the duct

- at least a first ionizer and / or at least one filter arranged in the aeraulic envelope between the inlet orifice and the converging part of the duct, the ionizer (s) and the filter (s) (s) being able (s) respectively to ionize and retain at least a substantial part of the dust and particles suspended in the air to be treated;

- a first reservoir containing a decontaminating composition in liquid form;

- a second reservoir connected to the first reservoir, the second reservoir being arranged in the aeraulic envelope such that the free surface of the liquid composition that it contains constitutes at least one zone of the converging part of the duct so that the flowing air sweeps said free surface; the first reservoir being supplied by the second reservoir when the free surface of the liquid composition that the latter contains is below a predetermined height;

- a turbine maintained in the aeraulic envelope downstream of the first and second reservoir, the turbine being adapted to create a vacuum in the duct between the inlet port and the outlet port.

Advantageously, the second reservoir is arranged such that the free surface of the liquid composition that it contains constitutes at least one zone of the converging part of the duct, the neck between the converging and diverging parts, and at least one zone of the divergent part of the duct.

According to an advantageous variant, the device comprises a level sensor for measuring the level of the decontaminating composition in the second tank. Real-time knowledge of the level of the decontaminating composition makes it possible to precisely adjust its free surface.

Another subject of the invention, according to a second alternative, is an apparatus for treating the air and the interior surfaces of a room, comprising:

- an aeraulic envelope comprising: an inlet orifice for the air to be treated, an outlet for the treated air, a duct comprising a converging part and a diverging part downstream of the converging part, the duct being shaped to create a venturi effect by passing a flow of the air to be treated through the conduit, the inlet port being connected to the converging part of the conduit while the outlet port is connected to the diverging part of the conduit

- a first reservoir containing a decontaminating composition in liquid form;

- at least one atomizer arranged in the conduit downstream of the ionizer (s) and / or the filter (s), the atomizer being supplied by the first reservoir to project micro and / or nano drops of the decontaminating liquid composition;

- a turbine maintained in the aeraulic envelope downstream of the sprayer, the turbine being adapted to create a vacuum in the duct between the inlet orifice and the outlet orifice.

According to an advantageous variant, the filters include at least one volatile organic compound (VOC) filter and at least one membrane filter for trapping particles suspended in the air other than VOCs.

Advantageously, the device comprises at least one pre-filter maintained in the aeraulic envelope, upstream of the filters, the pre-filter being able to retain the dust suspended in the air to be treated.

According to an advantageous embodiment, the part of the duct in the extension of the inlet orifice comprises two truncated cones nested one in the other by delimiting an annular space for the passage of the air flow to be treated, each one two truncated cones supporting or forming part of the electrodes of the first ionizer and the collection electrodes of an electrostatic filter.

According to this mode, one and / or the other of the truncated cones is (are) mounted to rotate, so as to generate during their rotation an ionization of the circulating air flow to be treated.

According to an advantageous embodiment, comprising downstream of the turbine, at least one second ionizer. According to this advantageous embodiment, the part of the duct opening onto the outlet orifice being a fixed cylinder, the second ionizer comprises an ionization electrode supported or formed by the fixed cylinder and a plurality of ionization electrodes supported by a shaft which extends along the axis of the cylinder and rotatably mounted around it. Alternatively, it is conceivable that the shaft supporting the plurality of ionization electrodes is fixed and the supported or formed ionization electrode is rotatable around the shaft. Cumulatively, it is also possible to use both the shaft and the rotating cylinder together, in the same direction or in the opposite direction, according to the needs observed by sensors and / or by measurements.

According to another advantageous embodiment, the apparatus comprises an atomizer connected to the first reservoir and arranged in parallel with the outlet orifice in order to project droplets of the decontaminating liquid composition as close as possible to the interior surfaces of the room. The filter (s) can be soaked with a decontaminating composition in liquid form.

Advantageously, the decontaminating liquid composition is that described and claimed in the international application filed on November 22, 2019 under number PCT / EP2019 / 082236. This decontaminating composition has both bactericidal, fungicidal and virucidal properties and comprises as active components:

- at least 1% by weight of clays;

- at least 1% by weight of algae;

- at least 5% by weight of eugenol;

- at least 0.5% by weight of eugenol acetate;

- at least 0.01% by weight of vanillin;

- at least 0.1% by weight of carvacrol; relative to the total weight of the composition.

The apparatus may include casters for moving the apparatus.

The aeraulic envelope can be fixed to a wall or ceiling of a room or placed on a fixed support inside a room.

According to an advantageous embodiment, the apparatus comprises an electronic control unit programmed to control the operation of the suction turbine and, where appropriate, of the atomizer, and of the ionizer (s) according to ranges. schedule predefined and / or by servo-control of pollutant measurement sensors - ambient air contaminants.

The apparatus may include an electrical power outlet and / or electrical energy storage means for electrically supplying the suction turbine, and where appropriate the second reservoir and the atomizer and the ionizer (s). ).

Thus, the invention consists essentially of an apparatus whose components function firstly to clean the air by ionization and / or filtration and then to mix this disinfected air with droplets of a depolluting / decontaminating liquid substance, that is to say by bringing the cleaned air into contact with a free surface of the substance, or by means of an atomizer.

This mixture is expelled into the ambient air which allows the complete treatment of a given closed volume, ventilated or not of a room, including all of its interior surfaces.

According to an advantageous embodiment, the apparatus comprises, just before its outlet orifice, an ionizer for ionizing the cleaned air / droplets mixture of decontaminating composition. It is widely accepted today that ionization of air (anions) has advantages in its sanitation. But negative ions are very quickly attracted to neighboring walls and therefore cannot act isotropically in a given volume. Combining negative ions in the air with droplets of decontaminating substance causes the latter to act as a vehicle that will bring the cleaned air as far as possible into the enclosed space of a room.

The decontaminating activity of the droplets is enhanced by their ionization and their size causes them to be distributed throughout the volume of the air to be treated. Typically, the droplet diameter that the apparatus according to the invention produces can be between 0.1 and 30 micrometers, depending on the settings made. Advantageously, the diameter of the droplets can be reduced to drops, of nanometric (nanodrop) or even picometric (picodrop) dimensions.

The advantage of creating a vacuum to entrain the air allows the latter to pass through the aeraulic envelope, in a coherent and non-disordered manner. Indeed, the fact of creating a vacuum draws the air, which crosses the entire aeraulic envelope in an orderly fashion. When an overpressure is created, a principle widely used until now, a disorder is created and amplified at each obstacle encountered by the overpressed air. In the end, the air is deeply destructured, which cannot be harmful for a sanitation treatment. The advantage of carrying out ionization at the device inlet makes it possible to ionize the dust and make it fall to the ground immediately. This dust is subsequently treated with the cleaned air / droplets mixture of decontaminating composition which comes out of the device. This characteristic provides a significant reduction in energy consumption compared to vacuum cleaners according to the state of the art and makes it possible to envisage an autonomous device which carries its energy source on board.

A variant is to introduce a pre-filter at the inlet to filter at least most of the dust contained in the air to be treated, so that nothing can clog the rest of the device, and that the treatment of pollution and contamination is carried out with the greatest optimization of efficiency, the air being free of any disturbance of the dust type.

Whatever option is chosen, i.e. filter (s) and / or ionizer at the appliance inlet, the aim is to rid the incoming air of at least all dust and particulate contamination from the start. 'air flow inlet. Depending on the applications and / or environment, a single ionizer may suffice if its performance makes it possible to replace the functions of the usual filter (s) and therefore to eliminate them. The presence of the filter (s) can thus be made unnecessary.

The device according to the invention therefore allows cleaning of all of both the interior air of a closed volume of a room and of all of the interior surfaces, that is to say the ceilings, walls, floors, but also all surfaces of furniture or interior objects, such as tables, furniture, equipment, lighting, etc.

The apparatus according to the invention has few parts, a small footprint and a reduced weight. The ease of use and the possibilities of use are almost endless and limitless.

Other advantages and characteristics of the invention will become more apparent on reading the detailed description of examples of implementation of the invention given by way of illustration and not by way of limitation with reference to the following figures.

Brief description of the drawings

[Fig 1] Figure 1 is a schematic longitudinal sectional view of an apparatus according to a first alternative of the invention.

[Fig 2] Figure 2 is a schematic longitudinal sectional view of an apparatus according to a second alternative of the invention.

[Fig 2A] Figure 2A is a cross-sectional view along AA of Figure 2 [Fig 3] Figure 3 is a schematic view of an apparatus showing different modes and variations of the invention.

[Fig 4] Figure 4 is a schematic cross-sectional view showing an ionizer arranged at the outlet of the device, according to an advantageous embodiment.

detailed description

Throughout the present application, the terms “inlet”, “outlet”, “upstream” and “downstream” are to be understood by reference with respect to the direction of the air flow to be treated through an apparatus according to l 'invention. Thus, the inlet orifice designates the orifice of the device through which the air to be treated is sucked in, while the outlet one designates the one through which the air flow exits.

There are shown in Figures 1 and 2 two alternatives of an apparatus according to the invention generally designated by the reference numeral 1, intended to carry out the treatment of air and the interior surfaces of a room.

The apparatus 1 comprises a body 10 which forms a housing housing all of the components of the apparatus.

The housing 10 firstly integrates an aeraulic envelope 2 comprising an inlet port 20 for the air to be treated, an outlet port 21 for the treated air, and a duct 22.

The duct 22 comprises a converging part 220 and a diverging part 221 downstream of the converging part, the duct being shaped to create a venturi effect by passing a flow of air to be treated through the duct 22. The converging part 220 of the duct may include a truncated cone immediately downstream of the inlet port 20.

The inlet port 20 connected to the converging part 220 of the duct 22.

The outlet port 21 is connected to the diverging part 221 of the duct 22.

Immediately downstream of the inlet orifice 20 is arranged at least one ionizer 3 and / or at least one filter 4. The ionizer 3 and the filter (s) 4 are able respectively to ionize and to retain at the same time. minus a substantial part of the dust and particles suspended in the air to be treated.

An advantageous embodiment of an ionizer 3 is shown in Figure 2A.

In this mode, the part of the duct 22 in the extension of the inlet orifice 20 comprising two truncated cones nested one in the other by delimiting an annular space 222 for the passage of the air flow to be treated, each two truncated cones supporting or forming part of the electrodes 30, 31 of the ionizer and the collection electrodes 30, 31 an electrostatic filter. It is possible to provide one and / or the other of the truncated cones 30, 31 itself (in) t rotatably mounted, so as to generate during their rotation an ionization of the air flow to be treated. that circulates.

The filters 4 can advantageously consist of a volatile organic compound (VOC) filter, a membrane filter to trap particles suspended in the air other than VOCs and a pre-filter maintained in the aeraulic envelope. , upstream of the filters, the pre-filter being able to retain the dust suspended in the air to be treated.

The housing 10 further houses a storage tank 5 containing a decontaminating composition in liquid form.

According to a first alternative illustrated in Figure 1, there is provided another tank 6 connected to the storage tank 5. This tank 6 is arranged in the aeraulic envelope 2 such that the free surface of the liquid composition it contains, constitutes at least one zone of the converging part 220 of the duct, the neck 223 between the converging 220 and diverging parts 221, and at least one zone of the diverging part of the duct.

When the free surface of the liquid composition that the reservoir 6 contains is below a predetermined height, then a quantity of decontaminating liquid composition is sent to the reservoir 6 from the reservoir 5. A level sensor can be arranged to measure the level. level of the decontaminating composition in the reservoir 6 and, which makes it possible to know in real time the level of the decontaminating composition and to precisely adjust its free surface.

According to a second alternative illustrated in FIG. 2, there is provided instead of the reservoir 6 with free surface, an atomizer 7 arranged in the duct 22 downstream of the ionizer 3 and / or of the filter (s) 4. The atomizer 7 is supplied by the storage tank 5 to project micro and / or nano drops of the decontaminating liquid composition.

Whatever the alternative, the housing finally houses a turbine 8 to create a vacuum in the duct 22 between the inlet port 20 and the outlet port 21.

An advantageous embodiment is illustrated in Figure 3: an ionizer 9 is arranged downstream of the turbine 8 just before the outlet port 21.

The ionizer 9 is advantageously produced as illustrated in FIG. 4. The part of the duct opening out into the outlet orifice 21 is a cylinder. The ionizer 9 comprises an ionization electrode 90 supported or formed by the cylinder and a plurality of ionization electrodes 91 supported by a shaft 92 which extends along the axis of the cylinder and mounted around it. this. The cylinder and / or the shaft 92 can be fixed or mounted to rotate. Depending on the applications and / or the local environment, the shaft 92 and / or the cylinder can be rotated, rotating in the same direction or in the opposite direction to each other.

The operation of a device 1 which has just been described is as follows:

The device 1 is positioned in a room to be treated.

After checking the filling level of liquid composition in the storage tank 5, the turbine 8 as well as, where appropriate, the ionizers 3, 9 are started.

The air to be treated is sucked in through the inlet port 20. The dust is retained in the filter (s) 4 and / or ionized by the ionizer 3. The heaviest dust falls by gravity on the ground. The other dust is collected by the filter (s) or the electrostatic precipitator and is subsequently removed by scraping.

The air thus cleaned is mixed with the sanitizing micro or nano droplets either from the reservoir 6 or from the atomizer 7.

Ionizer 9 ionizes the cleaned air / droplets mixture of decontaminating composition. Thus the decontaminating activity of the droplets is reinforced by this ionization. The droplets of the decontaminating solution mixed with the cleaned and ionized air are distributed throughout the volume of the room to be treated. Typically, the air cleaned and mixed with the sanitizer droplets is expelled in the form of a cloud at a speed of between 1 and 10 km / h in the volume.

Figure 3 illustrates alternative and advantageous component arrangements.

Another atomizer 11 connected to the storage tank 5 can be installed in parallel with the outlet orifice 21 to project droplets of the decontaminating liquid composition as close as possible to the walls of the room.

An electronic control unit 12 can be installed in the space above between the aeraulic envelope 2 and the wall of the box 10. This unit 12 is advantageously programmed to control the operation of the turbine 8, of T (es) atomizer (s) 7, 11 and ionizer (s) 3, 9 according to predefined time slots and / or by servo-control of ambient air pollutant measurement sensors.

Electrical energy storage means 13 can be installed in the space below between the aeraulic casing 2 and the wall of the housing 10. These means 1 can electrically supply the turbine 8, the storage tank 5, T (es ) atomizer (s) 7 and 11 and the ionizer (s) 3, 9. The apparatus 1 can thus be completely autonomous. The device 1 can be provided with casters 14 to move it easily in the room to be treated.

Device 1 can be very compact with typically HxW dimensions in the range of 10x5cm to 20x10cm. The power consumption of the device 1 can be very low, typically 72 to 100 watts.

Other variations and improvements can be envisioned without departing from the scope of the invention.

First, the device can be fitted with a swiveling outlet head to bring the treated air to a desired area.

Furthermore, it is possible to arrange in the apparatus a plurality of sensors configured to determine, in real time, in particular the ionization power to be applied at the input, the charge density of the air by the decontaminating liquid solution, the power of ionization to be applied at the outlet, the vacuum value to be supplied by the turbine. All of these sensors will be connected to the control-command unit of the device for operation by servo-control according to pre-established instructions.

Depending on the premises to be treated by the device, provision can be made to arrange downstream of the ionizer at the outlet of the device, an ozone trap, possibly connected to the aforementioned sensors.

A radar and / or mapping system can be integrated into the device in order to move the device autonomously in a determined volume of room without human intervention, and possibly outside of the hours of occupancy of the room.

To move the device, one can provide casters 14 as illustrated in Figure 3. Alternatively, one can also provide a movement system suspended by cable, or rail, in order to initiate the treatment of the volume of the room preferably in height. The device's control unit can be controlled remotely, by a wireless communication system, such as Wifi or Bluetooth®.

Cited reference:

[1]: R. Gouri, "Electrical and geometric optimization of a dielectric barrier electrostatic precipitator in square wire-tube configuration. Application to submicronic particles ”, thesis of the University of Poitiers, 2012.

Claims

1. Device (1) for treating the air and interior surfaces of a room, comprising:

- an aeraulic envelope (2) comprising: an inlet port (20) for the air to be treated, an outlet port (21) for the treated air, a duct (22) comprising a converging part (220) and a divergent part (221) downstream of the converging part, the duct being shaped to create a venturi effect by passing a flow of air to be treated through the duct, the inlet orifice being connected to the converging part of the duct while the outlet orifice is connected to the diverging part of the duct;

- at least a first ionizer (3) and / or at least one filter (4) arranged in the aeraulic envelope between the inlet orifice and the converging part of the duct, the ionizer (s) and the filter (s) being able to ionize and retain at least a substantial part of the dust and particles suspended in the air to be treated, respectively;

- a first reservoir (5) containing a decontaminating composition in liquid form;

- a second reservoir (6) connected to the first reservoir, the second reservoir being arranged in the aeraulic envelope such that the free surface of the liquid composition that it contains constitutes at least one zone of the converging part of the duct in order to that the air which flows comes to sweep said free surface; the first reservoir being supplied by the second reservoir when the free surface of the liquid composition that the latter contains is below a predetermined height;

- a turbine (8) maintained in the aeraulic casing downstream of the second reservoir, the turbine being adapted to create a vacuum in the duct between the inlet port and the outlet port.

2. Apparatus (1) for treatment according to claim 1, the second reservoir being arranged such that the free surface of the liquid composition that it contains constitutes at least one zone of the converging part of the duct, the neck (222 ) between the converging (220) and divergent (221) parts, and at least one area of the divergent part of the duct.

3. Apparatus (1) for treatment according to one of claims 1 or 2, comprising a level sensor for measuring the level of the liquid composition in the second tank.

4. Device (1) for treating the air and interior surfaces of a room, comprising:

- an aeraulic envelope (2) comprising: an inlet port (20) for the air to be treated, an outlet port (21) for the treated air, a duct (22) comprising a converging part and a diverging part downstream of the converging part, the duct being shaped to create a venturi effect by passing a flow of air to be treated through the duct, the inlet orifice being connected to the converging part of the duct while the outlet port is connected to the divergent part of the duct;

- at least one atomizer (7) arranged in the duct downstream of the ionizer (s) and / or of the filter (s), the atomizer being supplied by the first reservoir to project micro and / or nanodrops of the decontaminating liquid composition;

- a turbine (8) maintained in the aeraulic casing downstream of the sprayer, the turbine being adapted to create a vacuum in the duct between the inlet port and the outlet port.

5. Apparatus (1) for treatment according to one of the preceding claims, the filters comprising at least one volatile organic compound (VOC) filter and at least one membrane filter for trapping particles suspended in the air other than them. VOC.

6. Treatment apparatus (1) according to claim 5, comprising at least one pre-filter maintained in the aeraulic envelope, upstream of the filters, the pre-filter being able to retain the dust suspended in the air to be treated.

7. Apparatus (1) for treatment according to one of the preceding claims, the part of the duct in the extension of the inlet opening comprising two truncated cones nested one in the other by delimiting an annular space (223 ) passage of the air flow to be treated, each two truncated cones supporting or forming part of the electrodes (30, 31) of the first ionizer and the collection electrodes (30, 31) of an electrostatic filter.

8. Apparatus (1) for treatment according to claim 7, one and / or the other of the truncated cones being mounted to rotate, so as to generate during their rotation an ionization of the flow of air to be treated circulating.

9. Treatment apparatus (1) according to one of the preceding claims, comprising downstream of the turbine, at least a second ionizer (9).

10. Apparatus (1) for treatment according to claim 9, the part of the conduit opening onto the outlet orifice being a cylinder, the second ionizer comprising an ionization electrode (90) supported or formed by the cylinder and a plurality of ionization electrodes (91) supported by a shaft (92) which extends along the axis of the cylinder and mounted around the latter, the cylinder and / or the shaft being fixed or mounted to rotate.

11. Apparatus (1) for treatment according to one of the preceding claims, comprising an atomizer (11) connected to the first reservoir (5) and arranged in parallel with the outlet orifice (21) to project as close as possible to the interior surfaces. of the droplet area of the decontaminating liquid composition.

12. Treatment apparatus (1) according to one of the preceding claims, the filter (s) being soaked in a decontaminating composition in liquid form.

13. Treatment apparatus (1) according to one of the preceding claims, the decontaminating liquid composition exhibiting both bactericidal, fungicidal and virucidal properties and comprising as active components:

- at least 1% by weight of clays;

- at least 1% by weight of algae;

- at least 5% by weight of eugenol;

- at least 0.5% by weight of eugenol acetate;

- at least 0.01% by weight of vanillin;

14. Treatment apparatus (1) according to one of the preceding claims, comprising casters (14) for moving the apparatus.

15. Treatment apparatus (1) according to one of claims 1 to 14, the aeraulic envelope being fixed to a wall or to the ceiling of a room or placed on a fixed support inside a room.

16. Apparatus (1) for treatment according to one of the preceding claims, comprising an electronic control unit programmed to control the operation of the suction turbine and, where appropriate, of the atomizer, and of the ionizer (s). (s) according to predefined time slots and / or by slaving of ambient air pollutant measurement sensors.

17. Treatment apparatus according to one of the preceding claims, comprising an electrical supply outlet and / or electrical energy storage means for electrically supplying the suction turbine, and where appropriate the second reservoir and the. atomizer and ionizer (s).