Device for treating the ambient air of a room of a building, which device is intended to be installed in the room of a building

Abstract

The present invention relates to a device for treating the ambient air of a room of a building, which device is intended to be installed in the room of a building. The device (1) comprises a treatment chamber (4) provided with treatment means (5) comprising means (6) emitting UV radiation, a medium (7) with photocatalytic action, and cold plasma generating means (8). The device (1) comprises: - a base (10) in which ventilation means (3) are installed, - a reactor module (11) in which the treatment chamber (4) is installed, and - a casing (12) fitted at least around the reactor module (11), or around the base (10). The reactor module (11) comprises a support structure (111) on which the treatment means (5) are carried and fastened. Furthermore, the reactor module (11) is removably attached with respect to the base (10) and to the casing (12), advantageously to form a reactor module (11) which is replaceable and / or interchangeable among a range of reactor modules.

Description

Technical field of the invention

[0001] The present invention relates to the technical field of devices for the treatment of ambient air in a room of a building, intended to be installed in said room of a building. State of the art

[0002] Indoor air, within a room in a building, is often affected by pollution that can lead to health problems.

[0003] This indoor air pollution is caused largely by the presence of organic and chemical pollutants, namely generally Volatile Organic Compounds (VOCs), responsible in particular for allergies and more or less serious chronic diseases, on the one hand, and pathogenic microorganisms in suspension, on the other.

[0004] Indoor air treatment is therefore an essential tool in the fight against the health problems posed by this family of pollutants.

[0005] Many purification techniques (filtration, activated carbon, cold plasma, ozonation, ionization and photocatalysis) are known, with varying efficiencies depending on the pollutants.

[0006] Among these techniques, photocatalysis uses the phenomena of photocatalytic oxidation (PCO) which consists of applying ultraviolet radiation to a photocatalytic medium or photocatalyst.

[0007] In the presence of oxygen and water vapor, ultraviolet radiation, which activates a semiconductor material, allows molecules coming into contact with the reactive surface to transform into carbon dioxide and water vapor.

[0008] This technique makes it possible to eliminate gaseous compounds (primarily volatile organic compounds or VOCs) but also microorganisms.

[0009] For the implementation of this "PCO" purification technique, "indoor" treatment devices are proposed, intended to be installed in a room of a building.

[0010] Unfortunately, these "internal" treatment devices are not entirely satisfactory from a design standpoint.

[0011] Indeed, the maintenance and repair of such "internal" treatment devices is often complex and tedious, or even impossible, taking into account the structure and arrangement of the treatment means.

[0012] Furthermore, the structure and arrangement of these treatment means differ for each "indoor" treatment device. Therefore, it is necessary to have treatment means adapted to each "indoor" treatment device within a range. Document WO-A-2020 / 025747 describes an air treatment device having the characteristics of the preamble of claim 1. Presentation of the invention

[0013] In order to remedy the aforementioned drawback of the prior art, the present invention proposes a device for the treatment of the ambient air of a room in a building, intended to be installed in said room in a building, according to claim 1.

[0014] The device includes an air circuit which is delimited by an inlet and an outlet, adapted to a circulation of said ambient air from said inlet to said outlet.

[0015] The air handling system includes: ventilation means, to generate said ambient air circulation within said aerodynamic circuit, for example centrifugal fan means, and a treatment chamber in which said ambient air is intended to circulate.

[0016] The treatment chamber includes treatment equipment comprising: UV radiation emitting means, a photocatalytic action medium, advantageously an air-porous photocatalytic action medium, delimiting at least partially said treatment chamber, and cold plasma generating means.

[0017] According to the invention, the device comprises: a base in which the ventilation means are installed, a reactor module in which said treatment chamber is installed, and an envelope, fitted at least around said reactor module, or even around said base.

[0018] The reactor module includes a support structure on which the treatment means are mounted and fixed.

[0019] And which reactor module is removably attached to said base and said casing, advantageously to form a replaceable and / or interchangeable reactor module from a range of reactor modules.

[0020] The maintenance and repair of the "internal" treatment device according to the invention are thus greatly facilitated, where appropriate by a simple and effective replacement of the base, the reactor module or the casing.

[0021] Furthermore, the modular, or building block, design of the device according to the invention allows the reactor module to be adapted to a range of "indoor" treatment systems. In particular, the reactor module is scalable and can be adapted to specific pollution and / or contamination issues, notably through the sizing of adapted internal components.

[0022] Other non-limiting and advantageous characteristics of the product according to the invention, taken individually or in all technically possible combinations, are as follows: the base and the casing are joined together by means of removable fastening means, and said reactor module is enclosed in a space formed by the base / casing assembly; the base includes a first electrical circuit equipped with means for connection to an electrical supply, the reactor module includes a second electrical circuit adapted for the electrical supply of said processing means, and said first electrical circuit and said second electrical circuit are connected together by means of removable electrical connection means; the base includes a first, lower surface, serving as a base, and a second, upper surface, adapted to receive said reactor module;The UV radiation emitting means comprise at least one ring lamp, delimiting an interior space, and / or at least one straight lamp, passing, where appropriate, through the interior space delimited by said at least one ring lamp, which support structure is advantageously adapted to hold the two longitudinal ends of said at least one straight lamp; preferably, the treatment chamber has a longitudinal axis, for example a cylindrical treatment chamber, in which at least one ring lamp is installed coaxially with the longitudinal axis of said treatment chamber, and / or in which at least one straight lamp is installed parallel to the longitudinal axis of said treatment chamber; preferably again, the treatment chamber comprises at least two ring lamps which are distributed along the length of said longitudinal axis, and / or at least two straight lamps which are distributed around said longitudinal axis;the treatment chamber is cylindrical in shape, comprising a lateral wall parallel to a longitudinal axis, and said lateral wall comprises said photocatalytic media;

[0023] According to the invention: The air circuit includes an annular peripheral chamber surrounding the treatment chamber, advantageously delimited between the reactor module and the casing, and the air-porous photocatalytic medium is implanted so as to separate said treatment chamber and said annular peripheral chamber; the air circuit includes air guidance means which are structured to generate an ambient air circulation among a tangential air circulation, in which said ambient air passes through the photocatalytic medium, advantageously from the annular peripheral chamber towards the treatment chamber, or a longitudinal air circulation, in which said ambient air passes through the treatment chamber and along the photocatalytic medium.

[0024] Preferably, the air guidance means are chosen from among deflector means adapted to direct the airflow towards the annular peripheral chamber to generate tangential airflow, and deflector means adapted to direct the airflow towards the treatment chamber to generate longitudinal airflow; The fan means are provided downstream of the treatment chamber; the envelope has an elongated shape defining a longitudinal axis, with an upper transverse wall extended by a lower peripheral skirt, which inlet is provided within said upper transverse wall, and which outlet is provided on the circumference of said device, at a distance from said upper transverse wall, advantageously on the circumference of said lower peripheral skirt and / or of said base.

[0025] The present invention further relates to a reactor module for a device according to the invention, in which a treatment chamber is implanted.

[0026] The treatment chamber includes treatment equipment comprising: UV radiation emitting means, a photocatalytic action medium, advantageously an air-porous photocatalytic action medium, delimiting at least partially said treatment chamber, and cold plasma generating means.

[0027] The reactor module includes a support structure on which the said treatment means are mounted and fixed.

[0028] And the reactor module is adapted to be attached in a removable manner from said base and said casing, advantageously to form a replaceable and / or interchangeable reactor module from a range of reactor modules.

[0029] Of course, the different features, variants and embodiments of the invention can be combined with each other in various ways as long as they are not incompatible or mutually exclusive. Detailed description of the invention

[0030] Furthermore, various other features of the invention become apparent from the attached description made with reference to the drawings which illustrate non-limiting embodiments of the invention, the extent of the protection conferred on the invention being determined by the claims, and where: [ Fig. 1 ] is a schematic general view, in slight perspective and according to a partial cross-section, of an air treatment device according to the invention; [ Fig. 2 ] is a cross-sectional view of the air handling unit according to the figure 1 , schematically illustrating an initial air circulation; Fig. 3] is an exploded view of the air handling unit according to the figure 1 , schematically illustrating its modules for assembly; [ Fig. 4 ] is a schematic, isolated and partially cross-sectional view of the reactor module constituting the air treatment device according to the figure 1 ; [ Fig. 5 ] East a cross-sectional view of the air treatment system according to the figure 1 schematically illustrating a second air circulation.

[0031] It should be noted that, in these figures, the structural and / or functional elements common to the different variants may have the same references.

[0032] Device 1 according to the invention, also called "air treatment device" or "treatment device", is designed for the treatment of ambient air in a room of a building.

[0033] The ambient air in a room of a building is still commonly referred to as "indoor air".

[0034] The term "room of a building" advantageously encompasses an interior space within a building that is delimited by walls and partitions, in which people are intended to stay.

[0035] By "treatment of the ambient air of a room in a building", we include in particular the (partial or total) elimination of pollutants present in the indoor air of that room, in particular organic and / or chemical pollutants (advantageously Volatile Organic Compounds or VOCs) or pathogenic microorganisms in suspension.

[0036] Device 1 according to the invention is intended to be implanted in the building room to be treated (inside the building room to be treated and within the indoor air to be treated).

[0037] Such a device 1 is preferably mobile (self-contained unit) or fixed (ceiling or wall-mounted console), and preferably separate / independent from ventilation networks (in particular HVAC systems: Heating, Ventilation and Air Conditioning).

[0038] According to the invention, as illustrated in the Figures 1 And 2 In particular, device 1 includes an air circuit 2 which is delimited by two ends: an inlet 2a (upstream), through which the ambient air to be treated enters the device 1 and, an outlet 2b (downstream), through which the treated ambient air exits the device 1.

[0039] The air circuit 2 is thus adapted to a circulation of ambient air from its inlet 2a to its outlet 2b, and along which (between which) this ambient air undergoes a treatment adapted to the elimination of pollutants.

[0040] To achieve this, the air circuit 2 includes: ventilation means 3, to generate the circulation of ambient air within the air circuit 2, from its inlet 2a to its outlet 2b, and a treatment chamber 4 in which the ambient air is intended to circulate and undergo the treatment adapted to the elimination of pollutants.

[0041] In general, the treatment chamber 4 includes treatment equipment 5 which comprises: UV radiation emitting means 6, a photocatalytic action medium 7, and cold plasma generating means 8.

[0042] According to the invention, as shown in the figure 3 Device 1 comprises: a base 10 in which the ventilation means 3 are installed, a reactor module 11 in which the treatment chamber 4 is installed, and an envelope 12, fitted at least around the reactor module 11, or even around the base 10.

[0043] Device 1 according to the invention thus advantageously presents a structure of the "modular" or "brick" type.

[0044] The assembly of these elements 10, 11, 12 allows the manufacture of device 1.

[0045] According to the invention, the reactor module 11 is removably attached (also said to be removably assembled) relative to the base 10 and the casing 12.

[0046] This approach advantageously allows the formation of a reactor module 11 which is replaceable and / or interchangeable among a range of reactor modules 11.

[0047] According to an advantageous embodiment, the base 10 and the envelope 12 are joined together by means of removable fastening means 14 (shown very schematically on the figure 1 ), for example screws and / or interlocking structures.

[0048] The base 10 / envelope 12 assembly is advantageously airtight, in order to optimize the treatment of all the aspirated air.

[0049] In this advantageous embodiment, the reactor module 11 is advantageously enclosed in a location 15 formed / delimited by the assembly between the base 10 and the shell 12.

[0050] As illustrated on the figures 1 to 3 , device 1 advantageously includes a vertically oriented longitudinal axis 1'.

[0051] This device 1 advantageously has a general cylindrical shape. Generally, in this description, the term "cylindrical" encompasses a peripheral surface with a circular cross-section and, without limitation, any other cylindrical surface such as polyhedral surfaces (for example, a hexagon) or even an ovoid surface.

[0052] The reactor module 11 is mounted on the base 10; this reactor module 11 / base 10 assembly is itself covered by the envelope 12 which fits around the reactor module 11, and also around the base 10.

[0053] The reactor module 11, the base 10 and the envelope 12 are advantageously coaxial with respect to the longitudinal axis 1' of the device 1. Reactor module

[0054] The reactor module 11 includes a support structure 111 (or framework) on which the various treatment means 5 of the treatment chamber 4 are supported and fixed.

[0055] This support structure 111 is for example made of plastic material and / or metallic material.

[0056] The support structure 111 advantageously comprises different parts: transverse parts 1111, 1112, opposite and facing each other, advantageously upper and lower, on which are advantageously mounted and fixed the UV radiation emitting means 6 and the cold plasma generating means 8, and a lateral part 1113, on which is advantageously mounted and fixed the photocatalytic action medium 7.

[0057] At least one of these parts 1111, 1112, 1113 of the support structure 111 (or even all of these parts) is advantageously perforated to allow the passage of ambient air and to form a section of the aerodynamic circuit 2.

[0058] Preferably, the treatment chamber 4 has a longitudinal axis 4', advantageously vertical, to advantageously form a treatment chamber 4 of cylindrical shape.

[0059] Preferably, the photocatalytic medium 7 at least partially delimits the treatment chamber 4, advantageously its circumference. In other words, the photocatalytic medium 7 advantageously forms a tubular wall laterally delimiting the treatment chamber 4.

[0060] In general, the photocatalytic action medium 7 is known in itself, allowing the generation of radicals under irradiation and thus ensuring a photocatalytic oxidation phenomenon (“PCO”).

[0061] Preferably, this photocatalytic action medium 7 consists of an air-porous photocatalytic action medium 7, advantageously forming a filter, delimiting at least partially the treatment chamber 4.

[0062] For example, the photocatalytic action medium 7 comprises an inorganic fiber felt whose fibers are coated with a coating comprising a photocatalytic action catalyst.

[0063] The photocatalytic catalyst generally includes at least one oxide from among the following oxides: TiO2, ZnO, CeO2.

[0064] Furthermore, the UV radiation emitting means 6 are advantageously contained within the treatment chamber 4.

[0065] The UV radiation emitted by these UV radiation emitting means 6 irradiates the photocatalytic action medium 7 to obtain the phenomenon of photocatalytic oxidation.

[0066] The term "UV radiation emitting means" advantageously includes lamps emitting UV radiation, for example among UVc, UVb, UVa and VUV radiation.

[0067] The means of emitting UV radiation 6, in particular the number and arrangement within the treatment chamber 4, are adapted in particular according to the desired radiation power.

[0068] According to a modeOf preferred implementation, the 6 UV radiation emitting means include: at least one ring lamp 61, delimiting an interior space 611, and / or at least one straight lamp 62.

[0069] The ring lamp 61 is advantageously suited to the diameter of the treatment chamber 4.

[0070] When the UV radiation emitting means 6 comprise at least one ring lamp 61 and at least one straight lamp 62, said at least one straight lamp 62 advantageously passes through the aforementioned interior space 611.

[0071] Without being limited by any theory, said at least one straight lamp 62 ends up occupying the interior space 611 possibly not treated by said at least one ring lamp 61.

[0072] Said at least one straight lamp 62 is advantageously held by the support structure 111 at the level of its two ends.

[0073] For example, the upper transverse part 1111 advantageously includes a lamp support(s) equipped with socket(s); the lower transverse part 1112 includes housings, forming a lamp support(s), adapted to receive the free end of its straight lamps 62.

[0074] Preferably, said at least one ring lamp 61 is implanted coaxially to the longitudinal axis 4' of said treatment chamber 4.

[0075] Preferably, said at least one straight lamp 62 is implanted parallel to the longitudinal axis 4' of said treatment chamber 4.

[0076] Preferably, treatment chamber 4 includes: at least two ring lamps 61 which are distributed along the length of the longitudinal axis 4' of said treatment chamber 4, and / or at least two straight lamps 62 which are distributed around the longitudinal axis 4' of said treatment chamber 4.

[0077] Furthermore, the cold plasma generating means 8 are advantageously housed within the treatment chamber 4.

[0078] By "cold plasma", we mean in particular ionized particles that form around electrical discharges (sparks).

[0079] For this purpose, the cold plasma generating means 8 consist for example of a piezoelectric transformer for the generation of cold plasma directly on their surface (Piezoelectric Direct Discharge Plasma or PDDP), advantageously by dielectric barrier discharge on a SiO 2 plate and / or a semiconducting plate.

[0080] Such cold plasma generating means 8 advantageously exhibit at least one effect among an ozonating effect, an ionizing effect and a polarizing effect.

[0081] The cold plasma generating means 8 advantageously equip one of the transverse parts 1111, 1112 of the support structure 111 (for example the upper transverse part 1111). Base

[0082] Base 10 incorporates ventilation means 3 which advantageously consist of centrifugal fan means 3.

[0083] The centrifugal fan means 3 include mechanical devices in which air enters through a central orifice 31 and is expelled through at least one peripheral orifice 32 on its circumference (here at 360°).

[0084] The 3 ventilators are advantageously located downstream of the treatment chamber 4.

[0085] Furthermore, base 10 advantageously comprises two opposing surfaces: a first lower surface 101, serving as a base, and a second upper surface 102, adapted to receive the reactor module 11 (for example via its lower transverse part 1112), advantageously including the central orifice 31 in aerodynamic communication with the treatment chamber 4.

[0086] The base 10 further advantageously comprises a peripheral wall 103, connecting these two opposing surfaces 101, 102. This peripheral wall 103 is advantageously provided with at least one peripheral orifice 32. Envelope

[0087] The envelope 12 advantageously has an elongated shape defining a longitudinal axis 12' which advantageously corresponds to the longitudinal axis 1' of the device 1.

[0088] The envelope 12 preferably includes a transverse wall 121, upper, extended by a peripheral skirt 122, lower (open downwards opposite the transverse wall 121).

[0089] The inlet 2a and outlet 2b of the air circuit 2 are advantageously provided in the envelope 12.

[0090] In this regard, preferably: the transverse wall 121 has orifices 1211 forming the inlet 2a, and the peripheral skirt 122 has orifices 1221 forming the outlet 2b, advantageously at a distance from the transverse wall 121 (advantageously on the side of its lower end).

[0091] Preferably, the orifices 1211 of the transverse wall 121 are in the form of a ring, formed on the circumference of the transverse wall 121.

[0092] Preferably, this ring of orifices 1211 extends over a truncated conical, concave surface.

[0093] Preferably also, the orifices 1221 of the peripheral skirt 122 are in the form of a peripheral band.

[0094] The exit 2b is thus provided on the circumference of the device 1, at a distance from the upper transverse wall 121, advantageously on the circumference of the lower peripheral skirt 122 (advantageously on the side of its lower end).

[0095] In this case, the peripheral skirt 122 covers the peripheral wall 103 of the base 10. The orifices 1221 of this peripheral skirt 122 extend opposite said at least one peripheral orifice 32.

[0096] Alternatively, and not shown, the peripheral skirt 122 and the peripheral wall 103 of the base 10 are superimposed. The peripheral skirt 122 is then advantageously continuous (lacking the orifices 1221). The outlet 2b is advantageously formed by said at least one peripheral orifice 32 of the base 10.

[0097] In general, envelope 2 advantageously includes a human-machine interface (not shown), for example a touch screen or capacitive keys that can be backlit.

[0098] This interface advantageously occupies the transverse wall 121, for example surrounded by the orifices 1211 present. Electrical connection

[0099] According to a preferred embodiment, the base 10 includes a first electrical circuit 16 equipped with means for connection to an electrical supply (not shown, for example an electrical outlet connected to a power printed circuit board).

[0100] The reactor module 11 includes a second electrical circuit 17 adapted to supplying power to the treatment means 5 equipping the treatment chamber 4 (advantageously UV radiation emitting means 6 and cold plasma generating means 8).

[0101] This second electrical circuit 17 is advantageously supported by the upper transverse part 1111.

[0102] And the first electrical circuit 16 and the second electrical circuit 17 are advantageously connected together by means of removable electrical connection (not shown), for example removable electrical connectors, advantageously male / female electrical connectors.

[0103] This embodiment aims to facilitate the assembly and / or replacement of reactor module 11. Air circuit and annular peripheral chamber

[0104] According to a preferred embodiment, the air circuit 2 comprises an annular peripheral chamber 21 surrounding the treatment chamber 4, advantageously delimited between the reactor module 11 and the envelope 12.

[0105] The air-porous photocatalytic media 7 is implanted so as to separate the treatment chamber 4 and the annular peripheral chamber 21.

[0106] In general, the air circuit 2 advantageously includes air guidance means 25 which are structured to generate ambient air circulation among: a tangential airflow ( Figures 1 And 2 in particular), in which ambient air passes through the photocatalytic media 7, advantageously from the annular peripheral chamber 21 to the treatment chamber 4, or a longitudinal airflow ( figure 5 ), in which the ambient air passes through the treatment chamber 4 and along the photocatalytic action medium 7.

[0107] For this purpose, the air guidance systems 25 are chosen from: of the first deflector means 25a ( Figures 1 And 2 ) adapted to direct the airflow towards the annular peripheral chamber 21 to generate tangential airflow, and second deflector means 25b ( figure 5) adapted to direct the airflow towards the treatment chamber 4 to generate longitudinal airflow.

[0108] The air guidance means 25 are advantageously chosen from among the first deflector means 25a and the second deflector means 25b, depending on the desired air circulation.

[0109] In general, these deflecting means 25a, 25b are advantageously reported at the level of the upper transverse part 1111 of the support structure 111.

[0110] These deflecting means 25a, 25b advantageously each consist of an added, interchangeable part, implanted between the transverse wall 121 of the envelope 12 and the upper transverse part 1111 of the support structure 111.

[0111] The first 25a deflector means advantageously comprise two parts: a central part 25a1, adapted to close the upper transverse part 1111 of the support structure 111, and a peripheral part 25a2, openwork, to allow an aerodynamic communication between the inlet 2a and the annular peripheral chamber 21.

[0112] The second type of 25b deflectors advantageously comprises two parts: a central part 25b1, openwork, to allow an aerodynamic communication between the inlet 2a and the treatment chamber 4, through the upper transverse part 1111 of the support structure 111, and a peripheral part 25b2, adapted to close the upper end of the annular peripheral chamber 21. Implementation

[0113] In practice, the reactor module 11 is mounted on the base 10; this reactor module 11 / base 10 assembly is itself covered by the envelope 12 which fits around the reactor module 11, and also around the base 10.

[0114] For treating the ambient air in a room, the device is switched on with: the start-up of ventilation equipment 3, and the start-up of treatment equipment 5.

[0115] Ambient air then circulates within device 1, from its inlet 2a to its outlet 2b, while passing through the treatment chamber 4 in which the ambient air undergoes treatment adapted to the elimination of pollutants.

[0116] In the presence of the first deflecting means 25a ( Figures 1 And 2 ), ambient air enters through inlet 2a and is then directed towards the annular peripheral chamber 21 to generate tangential air circulation.

[0117] Ambient air thus enters the annular peripheral chamber 21, before entering the treatment chamber 4 by passing through the photocatalytic action medium 7.

[0118] Ambient air exits the treatment chamber 4 through the lower transverse part 1112 of the support structure 111, passes through the base 10 to exit through outlet 2b, here in a centrifugal manner.

[0119] In the presence of the second deflector means 25b generating longitudinal air circulation ( figure 5 ), ambient air enters through inlet 2a and is directed towards the treatment chamber 4 by passing through the upper transverse part 1111 of the support structure 111 to generate longitudinal air circulation.

[0120] Ambient air circulates longitudinally within the treatment chamber 4, to exit through the lower transverse part 1112 of the support structure 111, then pass through the base 10 to exit through the outlet 2b, here in a centrifugal manner.

[0121] In general, ambient air is advantageously drawn in axially at the level of an upper end of the device 1 (here through the transverse wall 121 of the envelope 12), then blown centrifugally at the level of a lower end of this same device 1 (here through the peripheral skirt 122).

[0122] This axial suction / centrifugal blowing arrangement advantageously ensures an external vortex optimizing the treatment of ambient air.

Claims

1. Device for treating the ambient air of a room of a building, which device is intended to be installed in the room of the building, said device (1) comprising an aeraulic circuit (2) which is outlined by an inlet (2a) and by an outlet (2b) which are adapted to a circulation of said ambient air from said inlet (2a) to said outlet (2b), said aeraulic circuit (2) comprising: - ventilation means (3) for generating said circulation of the ambient air in said aeraulic circuit (2), for example centrifugal ventilation means, and - a treatment chamber (4) in which said ambient air is intended to circulate, said treatment chamber (4) comprising treating means (5) with: - emitters of UV radiation (6), - a photocatalytic action media (7), preferably a photocatalytic action media (7) that is porous to air and outlines at least partially said treatment chamber (4), and - a base (10) in which said ventilation means (3) are arranged, - a reactor module (11) in which said treatment chamber (4) is arranged, and - an envelope (12) put at least around said reactor module (11) or even around said base (10), said reactor module (11) comprising a support structure (111) on which said treating means (5) are supported and fixed, and said reactor module (11) being removably attached to said base (10) and said envelope (12), characterized in that the device (1) comprises: means of generating cold plasma (8), and in that the aeraulic circuit (2) comprises an annular peripheral chamber (21) surrounding the treatment chamber (4) advantageously defined between the reactor module (11) and the envelope (12), and in that the porous-to-air photocatalytic reaction media (7) is arranged in order to separate the treatment chamber (4) and the annular peripheral chamber (21), said aeraulic circuit (2) comprising aeraulic guiding means (25) which are structured for generating an ambient air circulation chosen from among: - a tangential air circulation where said ambient air passes through the photocatalytic action media (7), advantageously from the annular peripheral chamber (21) to the treatment chamber (4) and - a longitudinal air circulation where said ambient air passes through the treatment chamber (4) and passes along the photocatalytic action media (7).

2. Device according to claim 1, characterized in that the base (10) and the envelope (12) are fixed together by means of removable fixing means (14), and in that said reactor module (11) is arranged in a location (15) formed by the assembly of base (10) / envelope (12).

3. Device according to anyone of claims 1 or 2, characterized in that the base (10) comprises a first electric circuit (16) provided with means for connecting to an electric power supply, in that the reactor module (11) comprises a second electric circuit (17) adapted to supply electrical power to said treating means (5), and in that said first electric circuit (16) and said second electric circuit (17) are connected to each other by removable electrical connection means.

4. Device according to anyone of claims 1 to 3, characterized in that the base (10) comprises: - a lower first surface (101) serving as a stand, and - an upper second surface (102) adapted for receiving said reactor module (11).

5. Device according to anyone of claims 1 to 4, characterized in that the emitters of UV radiation (6) comprise: - at least one annular lamp (61) defining an interior space (611) and / or - at least one straight lamp (62) passing, if appropriate, through the interior space (611) defined by said at least one annular lamp (61), said support structure (111) being advantageously adapted for holding both longitudinal ends of said at least one straight lamp (62).

6. Device according to claim 5, characterized in that the treatment chamber (4) has a longitudinal axis (4'), for example a cylindrical treatment chamber (4), said at least one annular lamp (61) being arranged coaxially to the longitudinal axis (4') of said treatment chamber (4) and / or said at least one straight lamp (62) being arranged parallel to the longitudinal axis (4') of said treatment chamber (4), said treatment chamber (4) comprising advantageously: - at least two annular lamps (61) which are distributed over the length of said longitudinal axis (4') and / or - at least two straight lamps (62) which are distributed around said longitudinal axis (4').

7. Device according to anyone of claims 1 to 6, characterized in that the treatment chamber (4) is cylindrical with a sidewall (7) parallel to a longitudinal axis (4'), and in that said sidewall (7) comprises said photocatalytic action media (7).

8. Device according to claim 7, characterized in that the aeraulic guiding means (25) are chosen among: - deflecting means (25a) adapted for orienting the air circulation towards the annular peripheral chamber (21) for generating the tangential air circulation, and - deflecting means (25b) adapted for orienting the air circulation towards the treatment chamber (4) for generating the longitudinal air circulation.

9. Device according to anyone of claims 1 to 8, characterized in that the envelope (12) has an elongated form defining a longitudinal axis (12') with an upper transverse wall (121) extended by a lower peripheral skirt (122), said inlet (2a) being arranged in said upper transverse wall (121) and said outlet (2b) being arranged on the circumference of said device (1), at a distance from said upper transverse wall (121), advantageously on the circumference of said lower peripheral skirt (122) and / or said base (10).

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