Air sanitisation system for air conditioning, heating or air circulation systems in indoor environments

Abstract

The subject matter of the present patent application is formed by a diffused air sanitisation system, particularly in centralised ducting systems or in unit heaters, said sanitisation system being energetically autonomous with respect to the devices to which it is applied. In particular, the subject matter of the present disclosure is formed by an air sanitisation system (900) for air conditioning or heating systems or forced air circulation systems in indoor environments. The sanitisation system (900) comprises a fan (200), a dynamo (300), a cold plasma generation unit (400), at least one support and retention element (600). The fan (200) is associated with the dynamo (300) which is, in turn, electrically associated with the cold plasma generation unit (400).

Description

[0001] AIR SANITISATION SYSTEM FOR AIR CONDITIONING, HEATING OR AIR CIRCULATION SYSTEMS IN INDOOR ENVIRONMENTS

[0002] DESCRIPTION

[0003] The subject matter of the present patent application is a diffused air sanitisation system, particularly in centralised ducting systems or in unit heaters or in ventilation systems for means of transport in general; said sanitisation system being energetically autonomous with respect to the devices to which it is applied. In particular, the subject matter of the present patent application is an air sanitisation system for air conditioning or heating systems or forced air circulation systems in indoor environments, wherein this sanitisation system is energetically autonomous with respect to the air conditioning or heating system or forced air circulation system in indoor environments with which it is associated during use.

[0004] Field of application

[0005] The invention of the present patent application finds application in the creation of ventilation systems - residential or public or in the sector of the creation of equipment for heating air in indoor environments.

[0006] The invention of the present patent application finds application also in the vehicle manufacturing sector, in particular in the ventilation / air conditioning systems with which vehicles are equipped.

[0007] By way of example, but not limited to, the following description refers to the sector of air conditioning, heating and air circulation systems in indoor environments, where with indoor environments it is also meant the cabin of a vehicle intended for the transport of people.

[0008] Notoriously in air conditioning, heating and air circulation systems, the air introduced into the environments is moved by a fan placed inside a machine and passed through one or more high-efficiency intake filters commonly known by the acronym EPA - Efficiency Particulate Air filter or HEPA - High Efficiency Particulate Air filter.

[0009] Generally this type of filters consists of a series of filtering surfaces in the form of sheets, typically made of microfibre and assembled in several layers to form a filtering grid.

[0010] The purpose of these systems is therefore to physically retain the solid polluting particles - particulate matter and / or pathogens - present in the air flow to be treated. Notoriously the HEPA filter, traversed by an air flow, is able to retain particles with a diameter greater than or equal to the diameter of the openings in the filter mesh, which is approximately equal to or greater than 0.1 p.

[0011] As efficient they are, the systems equipped with the aforementioned filtering systems are not able to eliminate viruses, bacteria or pathogenic micro-organisms, for the abatement of which a physical filtration action is ineffective.

[0012] Examples of air conditioning or ventilation / circulation systems are represented by systems known as unit heaters or controlled mechanical ventilation systems - identified hereinafter with the acronym VMC.

[0013] Unit heaters generally consist of a motor, a heat exchanger and a fan that generates a certain air flow that has been in contact with the exchanger and therefore heated.

[0014] Generally, unit heaters are equipped with filtering systems primarily consisting of filtering grids that apply a physical filtration to the air flow that hits them, retaining particulate matter and bacteria.

[0015] VMC-type systems consist of machines suitably realised to allow continuous air exchange and prevent problems related to humidity and mould proliferation.

[0016] Typically, VMC systems allow the expulsion of exhaust air from an indoor environment and the intake of air from outside; the most modern VMC solutions also include a heat exchanger to recover the thermal energy from the exhaust air removed from the environment and transfer it to the flow of air that is introduced into the environment.

[0017] Although they represent an effective system for air filtration, the filtering systems of this type known to date are able to physically retain particles and pathogens with a diameter greater than or at most equal to the diameter of the openings in the filter itself, but they do not act in terms of sanitising the air flow so much so that, often, the filter itself becomes a breeding ground for bacteria.

[0018] In general, the problem with VMC-type or unit heater systems is that the air filtration is a mechanical type of filtration that therefore works by retaining particulate matter and bacteria on the surface and / or inside the flow.

[0019] Indeed, it is well known that filters in VMC-type systems, as well as unit heaters, require periodic cleaning and maintenance in order to maintain an efficient filtering action and at the same time prevent contamination of the filtered air, said contamination being caused by the filter itself on which the pathogenic agents have proliferated. State of the art

[0020] State of the art, there are known technical solutions that aim to subject to sanitisation processes the filters of ventilation systems such as VMC or unit heaters, said processes being activated automatically and without maintenance intervention by an operator / user.

[0021] A first sanitisation system involves the use of UVC neon-type light sources placed in correspondence with the filtering elements.

[0022] Notoriously, sources of type C UV radiation - UVC - i.e. with wavelengths between 200 and 280 nm, activate a photochemical reaction that substantially affects the DNA of bacteria and micro-organisms.

[0023] Despite the proven sanitising action of UVC sources, a disadvantage of solutions that include this type of light source is that in general the light radiation and heat generated by the sources facilitates the multiplication of pathogenic elements.

[0024] Considering the air flow rates in a VMC system, the solution that could result from it - i.e. lowering the power of the UVC source - would not lead to the expected and necessary sanitisation results.

[0025] A further disadvantage of solutions that comprise a UVC source positioned near a HEPA filter is that, given the structure of the filter as mentioned above, the effectiveness of the emitted radiation would be concentrated on the outer surface of the filter and not on the intermediate layers that are in any case crossed by the air flow.

[0026] Another type of solution known to the state of the art comprises means for the realisation of a photocatalytic oxidation reaction realised through a UV source and catalytic filters usually treated with titanium dioxide.

[0027] Other solutions comprise the combination of the two aforementioned solutions, i.e. UVC action and photocatalytic oxidation on titanium dioxide.

[0028] Therefore, conventionally, ventilation systems - VMC or unit heaters - integrate in their structure means to activate the aforementioned sanitisation processes which, however, do not fully solve the problem of pathogen contamination.

[0029] Furthermore, a potential consequence of photocatalytic activity is the release of toxins such as formaldehyde or dioxin.

[0030] A further disadvantage of the solutions known to date is related to the costs of realisation, to the fact that the sanitisation units must be integrated into the ventilation systems already in the production phase and that these units involve high energy consumption. Alternative and well-known sanitisation systems involve the integration into the air vents built into the masonry structures of the rooms, however this type of solution requires an arrangement to be set up during the production phase of the vents themselves requiring a dedicated electrical configuration.

[0031] State-of-the-art there are known solutions including the integration of cold plasma generation units into the ventilation systems in order to sanitise the air and the environment in which it is conveyed.

[0032] Indeed, it is well to the state of the art the use of so-called ionising devices, consisting of polarising electrodes that generate an electric field that generates the emission of positive or negative ions - plasma - from the molecules present in the air which, by binding to the airborne particles present, allow them to aggregate until they reach a mass such that they precipitate or adhere electrostatically to surfaces with an opposite or neutral charge.

[0033] For example, patent application WO23194770 describes a device for air sanitising and filtering that comprises an air treatment chamber in which ionising devices are provided, said devices being of the cold plasma generator type.

[0034] The patent application WO22062053 A1 describes an air conditioning system equipped with a cold plasma generator type air sanitisation device.

[0035] The disadvantage of the solutions exemplified in the aforementioned documents is that the sanitisation system, which is created using a cold plasma generator, is irreversibly integrated into the air conditioning or recirculation systems, and requires additional energy to power the sanitisation system.

[0036] The purpose of the invention of the present patent application is to resolve the highlighted disadvantages of the state of the art, in particular by creating a sanitisation system for air conditioning, heating and forced air circulation systems, said system being effective in terms of the problem of reducing pathogens and particulate matter / fine dust, said sanitisation system being energetically autonomous with respect to the power supply system of the device in which it is installed.

[0037] A further purpose of the invention of the present patent application is to create an energy self-sufficient sanitisation system that can also be installed on existing air conditioning, heating or air circulation systems.

[0038] In particular, a subject matter of the present patent application is formed by a cold plasma generation system that can be integrated or integrated mechanically into any peripheral air vent or into unit heater-type systems, said system being autonomous from the point of view of power supply thanks to an integrated micro-dynamo, said system being equipped with a fan suitably designed so as not to interfere with the dynamics of the flows generated by the system in which the system that is the subject matter of the patent application is inserted.

[0039] Notoriously, plasma is an ionised gas that creates an invisible field of electrically charged particles called “plasma jet”. It can transport and supply energy to the surface and the air, where it interacts with the components of microbial cells, causing them damage. In this way, their life process is interrupted: the microbes can therefore no longer replicate or infect others.

[0040] Cold plasma is currently a widely used technology in the medical field and is currently used to maximise tissue oxygenation, promote the elimination of pathogenic agents. The advantage of using cold plasma for sanitisation and antimicrobial prevention is determined by the fact that it is a technology that does not require the use of chemicals or other additives, it has been proven effective against antibiotic-resistant bacteria, it does not require cleaning / drying actions and the antibacterial action is achieved within a few minutes.

[0041] A further advantage of using cold plasma is that it does not generate heat, nor does it produce compounds, such as combustion products, that can be harmful to humans.

[0042] Cold plasma technology has also proven effective in the process of reducing fine particles, as it allows the interaction between particles to create clusters that fall due to gravity or that are deposited on surfaces due to electrostatic effect, thus removing them from the surrounding air.

[0043] The characteristics of the air sanitisation system that is the subject matter of the present patent application will therefore be evident in the subsequent description and attached claims.

[0044] The system that is the subject matter of the present patent application is therefore represented by way of example but not limited to in the attached Drawings in which: Figure 1: represents a side and schematic overview of the sanitisation system that is the subject matter of the present patent application in one of its embodiments;

[0045] Figure 2 - Figure 2. a: each represent a side view of an element of the sanitisation system that is the subject matter of the present patent application in a respective embodiment;

[0046] Figure 3 - Figure 3. a: represents a first method of use or installation of the sanitisation system that is the subject matter of the present patent application; Figure 4 - Figure 4. a: represents a second method of use or installation of the sanitisation system that is the subject matter of the present patent application;

[0047] Figure 5: represents a side and schematic overview of the sanitisation system that is the subject matter of the present patent application in one of its embodiments.

[0048] Detailed description

[0049] With reference to the attached Figures and in particular to Figure 1, the air sanitisation system that is the subject matter of the present patent application is indicated in its entirety with reference number 900. As anticipated, the invention of the present patent application is an air sanitisation system 900 for air conditioning or heating systems or forced air circulation systems in indoor environments. In other words, the air sanitisation system 900 is apt to be associated with an air conditioning or heating system or a forced air circulation system in indoor environments. In particular, the air sanitisation system is apt to be inserted into a duct 100 or associated with an outlet vent 700 of a duct 100 of an air conditioning or heating system or forced air circulation system in indoor environments. In use, the air sanitisation system 900 is intended to be invested or lapped by an airflow passing through the duct or vent of the air conditioning or heating system or the forced air circulation system in indoor environments to which the air sanitisation system 900 is associated.

[0050] As illustrated in Figure 1, the invention of the present patent application comprises a fan 200, a dynamo 300, a cold plasma generation unit or device 400 equipped, according to known technology, with a pair of electrodes 500 for the production of positive and negative ions and at least one support and retention element 600.

[0051] As known, the process of generating cold plasma by means of the pair of electrodes 500 allows the production of ozone in such quantities as to carry out a bactericidal action inside the air conditioner or forced air recirculation system in which the sanitisation system 900 is inserted. In other words, the cold plasma generation unit 400 is configured to generate positive and negative ions. Preferably, the cold plasma generation unit is apt to generating positive and negative ions in quantities such as to carry out a bactericidal action inside the air conditioning or heating system or the forced air circulation system in environments where the air sanitisation system 900 is intended to be inserted.

[0052] According to the invention of the present patent application, the system 900 developed according to the description comprises at least one support and retention element 600. The support and retention element 600 acts as a coupling means that allows the coupling to the vent 700 or to the duct system 100 of an air conditioning, heating or forced air circulation element. In other words, the support and retention element 600 is configured to be associated with an air conditioning or heating system or a forced air circulation system in indoor environments, in particular with a duct 100 or with an outlet vent 700 of a duct 100 of an air conditioning or heating system or a system for the forced air circulation of air in indoor environments.

[0053] According to the invention of the present patent application, the fan 200 is associated, i.e. operationally coupled, with the dynamo 300. In turn, the dynamo 300 is electrically associated, i.e. electrically coupled, with the cold plasma generation unit 400. For example, the connection between dynamo 300 and cold plasma generation unit 400 is by means of a cable 800.

[0054] In use, the fan 200 is activated by the air flow generated as known by the air conditioning, heating or forced air circulation system in which the sanitisation system 900 is inserted. In other words, in use, the fan 300 is intended for being hit or lapped by an airflow that flows through the duct 100 or the outlet vent 700 of the air conditioning or heating system or forced air circulation system in indoor environments with which, in use, the air sanitisation system 900 is associated.

[0055] In particular, the activation of the fan 200 allows the charging of the dynamo 300, to which the fan 200 is associated. Namely, in use, the dynamo 300 powers the cold plasma generation unit 400. In use, the impact of the air flow mentioned above on the fan 200 thus induces the rotation of the fan 300. In other words, in use, the fan 300 is set in rotation by the air flow that flows through the duct 100 or the outlet vent 700 of the air conditioning or heating system or forced air circulation system in indoor environments to which, in use, the air sanitisation system 900 is associated. The fan 200 is operationally associated with the dynamo 300 to convert the kinetic energy associated with the rotary motion of the fan 200 into electrical energy. In turn, the dynamo 300 is electrically connected to the cold plasma generation unit 400 to power it. In this way, the sanitisation system 900 according to the present invention, is electrically autonomous with respect to the air conditioning or heating system or forced air circulation system in indoor environments with which it is intended to be associated. In other words, the sanitisation system 900 does not substantially involve an increase in energy consumption of the system with which, in use, the sanitisation system 900 is associated, since the kinetic energy associated with the rotary motion of fan 200 induced by the air flow generated by the system with which the sanitisation system 900 is associated in use is exploited to power the cold plasma generation unit. In this way, the sanitisation system 900 can be combined with an already installed air conditioning, heating or forced air circulation system in indoor environments. Furthermore, the absence of mechanical filters reduces the need for frequent maintenance interventions.

[0056] According to a preferred embodiment of the invention, the support and retention element 600 has elastic properties and constitutes the means that allows it to be inserted into the air vent or duct system of an air conditioning, heating or forced air circulation element. In other words, according to a preferred embodiment of the invention, the support and retention element 600 is configured to deform elastically. In other words, the support and retention element 600 is an elastic coupling means. Preferably, the dynamo 300 and / or the cold plasma generation unit 400 and / or the fan 200 are fixed directly or indirectly to the support and retention element 600.

[0057] In a preferred, but non-limiting, embodiment, illustrated by way of example in Figure 2, the support and retention element 600 consists of, or rather includes, a longitudinally extending element 610 made of a material with elastic properties. In particular, the longitudinally extending element 610 has an upper appendage 611 at the upper end and a lower appendage 612 at the lower end, also made of a material with elastic properties. According to this preferred embodiment, therefore, the support and retention element 600 comprises a longitudinal portion 610, i.e. having a longitudinal development, i.e. developing predominantly along a longitudinal direction. The longitudinal portion 610 extends between an upper end and a lower end. Furthermore, according to this preferred embodiment, the support and retention element 600 comprises an upper appendage 611 associated with the upper end of the longitudinal portion 610 and a lower appendage 612 associated with the upper end of the longitudinal portion 610. Preferably, the upper appendage 611 and the lower appendage 612 project respectively from the upper end and the lower end of the longitudinal portion 610. Preferably, the upper appendage 611 and the lower appendage 612 are elastically deformable.

[0058] More preferably, the dynamo 300 and / or the cold plasma generation unit 400 and / or the fan 200 are fixed directly or indirectly to the longitudinal portion 610 of the support and retention element 600. For example, as illustrated in Figure 1 , the dynamo 300 and / or the cold plasma generation unit 400 and / or the fan 200 are fixed directly or indirectly to the longitudinal portion 610 of the supporting and retention element 600. In particular, the upper appendage 611 extends along a first plane substantially orthogonal with respect to the plane of extension of the longitudinally extending element 610 and the lower appendage 612 extends along a second plane substantially orthogonal with respect to the plane of extension of the longitudinally extending element 610 and in the opposite direction to the direction of extension of the upper appendage 611. In other words, each of the upper appendage 611 and the lower appendage 612 extends mainly along a respective direction of extension. Preferably, the direction of extension of the upper appendage 611 and the lower appendage 612 is transversal, more preferably substantially orthogonal, to the aforementioned longitudinal direction. In other words, the upper appendage 611 extends along a first direction of extension that is transversal, more preferably substantially orthogonal, to the aforementioned longitudinal direction; similarly, the lower appendage 612 extends along a second direction of extension that is transversal, more preferably substantially orthogonal, to the aforementioned longitudinal direction.

[0059] Furthermore, preferably, the upper appendage 611 and the lower appendage 612 each extend along their respective direction of extension in an opposite sense to each other. In other words, the upper appendage 611 extends along the first direction of extension in a first sense and the lower appendage 612 extends along the second direction of extension in a second sense opposite to the first sense. It follows that a longitudinal section of the support and retention element 600 is substantially in the shape of the letter ‘Z’.

[0060] In a second preferred, but not exclusive, embodiment, illustrated by way of example in Figure 2a, the support and retention element 600 consists of an element having a U-shaped profile, i.e. it consists of a longitudinally extending element 610, made of a material having elastic properties, said longitudinally extending element 610 having at the upper end an upper appendage 611 and at the lower end a lower appendage 612, also made of a material having elastic properties.

[0061] In particular, the upper appendage 611 extends along a first plane that is substantially orthogonal with respect to the plane of extension of the longitudinally extending element 600.1 and the lower appendage 612 extends along a second plane that is substantially orthogonal with respect to the plane of extension of the longitudinally extending element 610 and in the same direction of extension as the upper appendage 611. In other words, the second preferred embodiment of the support and retention element 600, as illustrated for example in Figure 2a, differs from the first preferred embodiment of the support and retention element 600, as illustrated for example in Figure 2, in that the upper appendage 611 extends along the first direction of extension in a first sense and the lower appendage 612 extends along the second direction of extension in a second sense concordant with the first sense, i.e. coinciding with the first sense.

[0062] Preferably, in both the first and second preferred embodiments of the support and retention element 600, the upper appendage 611 and the lower appendage 612 are substantially fin-like shaped.

[0063] Regardless of the preferred embodiments mentioned above, the support and retention element 600 allows for the insertion of the sanitisation system 900, which is the subject matter of the present patent application, and consequently the adaptation to all types of air conditioning, heating or forced air circulation systems.

[0064] According to a preferred aspect of the subject matter of the present patent application, in which the support and retention element 600, as described so far, is a first support and retention element 600‘ and in which the sanitisation system 900 comprises a second support and retention element 600”. The second support and retention element 600" is identical to the first support and retention element 600' and therefore is not described in greater detail. If the sanitisation system comprises a first support and retention element 600' and a second support and retention element 600”, preferably the dynamo 300 and the fan 200 are associated with the first support and retention element 600’ and the cold plasma generation unit is associated with the second support and retention element 600".

[0065] According to a preferred embodiment of the invention of the present patent application, an electronic board 410 is integrated into the plasma generation unit 400, intended to transform the electric current from AC to DC and stabilise it at a voltage dimensioned to power the cold plasma generation unit 400 itself. According to a preferred aspect of the invention that is the subject matter of the present patent application, the sanitisation system 900 comprises an electronic unit 410 associated with the cold plasma unit 400 or integrated with the plasma generation unit 400. Furthermore, the electronic unit 410 is also electrically associated with the dynamo 300. Preferably, this electronic unit 410 comprises an AC / DC converter configured to transform the alternating electric current AC generated by the dynamo 300 into direct electric current DC to be supplied to the cold plasma generation unit 400. In particular, the direct electric current DC has a constant, i.e. stabilised, voltage.

[0066] According to a preferred aspect of the invention that is the subject matter of the present patent application, the cold plasma generation unit 400 also comprises an earth reference which, according to known technology, consists of a metal grid. Preferably, the cold plasma generation unit 400 comprises an earthing element, such as for example a metal grid.

[0067] In a preferred embodiment, the sanitisation system 900 developed as described above comprises an LED-type signalling element 420 integrated into the body of the cold plasma generation unit 400 in order to identify the activation status of the system 900 itself. In other words, according to this preferred embodiment, the cold plasma generation unit 400 comprises a box-shaped body and a signalling element 420, preferably luminous and more preferably of the LED type, associated with the box-shaped body to emit a light signal externally with respect to the box-shaped body.

[0068] In particular, according to a further preferred aspect, the LED-type signalling system includes an activation mechanism correlated to the passage of the air flow and therefore correlated to the movement of fan 200. In other words, the signalling element 420 is configured to be activated in case the fan 200 performs a rotary movement. It follows that the signalling element 420 is therefore also connected to the fan 200.

[0069] In a further preferred embodiment, the sanitisation system 900 realised according to what described above comprises a radio unit 430 integrated into the body of the cold plasma generation unit 400 which notifies a centralised system of a range of information such as, by way of example but not limited to, the operating status of the system 900 or the duration of operation. In other words, the sanitisation system 900 preferably comprises a transmission unit 430, such as for example a radio unit. Preferably, the transmission unit 430 is associated with the box-shaped body of the cold plasma generation unit 400. Preferably, the transmission unit 430 is configured to send signals, such as radio signals, to a centralised unit, such as for example a control unit of an air-conditioning or heating system or a forced air circulation system in indoor environments with which the sanitisation system 900 is intended to be associated. The radio signals may concern the operating status of the sanitisation system 900 or the duration of operation of the sanitisation system 900. Regardless of the preferred embodiments mentioned above, the sanitisation system 900, realised according to what described above, is automatically activated by the passage of air and therefore does not require power supply units such as batteries or similar, drastically reducing or even eliminating the need for intervention with regard to the replacement of power supply units.

[0070] Description of preferred application modes

[0071] First preferred mode of use.

[0072] With reference to Figure 3 and Figure 3. a, in a first preferred mode of use, the sanitisation system 900 is inserted in a VMC type system.

[0073] In particular, the sanitisation system 900 consists of, or comprises, a fan 200 associated with a dynamo 300 which is in turn associated with a cold plasma generation device 400 and a support and retention element 600 and is inserted, by means of the support and retention element 600, in the duct 100 of a generic forced air recirculation system of the VMC type, said system comprising, at the outlet of the duct 100, an air outlet vent 700.

[0074] Second preferred mode of use.

[0075] With reference to Figure 4 and Figure 4. a, in a second preferred mode of use, the sanitisation system 900 is inserted in a unit heater type device.

[0076] In particular, the sanitisation system 900 inserted in the unit heater type device consists of, or comprises, a fan 200 associated with a dynamo 300 and a first support and retention element 600‘, and a cold plasma generation device 400 associated with a second support and retention element 600”.

[0077] According to the aforementioned preferred embodiment, the electrical connection between the dynamo 300 and the cold plasma generation device 400 is made by means of a cable 800. In other words, the dynamo 300 is electrically connected to cold plasma generation device 400 by means of a cable 800.

[0078] In a preferred, but not exclusive, embodiment, the first support and restraint element 600‘ and the second support and restraint element 600” are each constituted by a U-shaped profile in which at least the lateral ends are made of a material with elastic properties.

[0079] In the second preferred mode of use, the sanitisation system 900 is inserted by means of the first support and retention element 600‘ and the second support and retention element 600” in the duct 100 of a unit heater, said unit heater including at the outlet of the duct 100, an air outlet vent 700. Regardless of the preferred mode of use mentioned above, the sanitisation system 900, which is the subject matter of the present patent application, allows to advantageously overcome the disadvantages of the aforementioned state of the art, in particular by developing a sanitisation device 900 that can be inserted into already installed systems, that does not involve an increase in consumption as it is powered directly by the generated air flow and that does not require special maintenance interventions.

Claims

CLAIMS1. Sanitisation system (900) of air for air conditioning or heating systems or forced air circulation systems in indoor environments; wherein said system (900) comprises a fan (200), a cold plasma generation unit (400) and at least one support and retention element (600), and wherein said sanitisation system (900) is characterised in that it also comprises a dynamo (300) and in that the fan (200) is associated with the dynamo (300) which is, in turn, electrically associated with the cold plasma generation unit (400).

2. Sanitisation system (900) according to claim 1 characterised in that, in use, the fan (200) is activated by the air flow from the air conditioning, heating or forced air circulation system wherein the sanitisation system (900) is intended to be inserted by means of the support and retention element (600) allowing the powering of the dynamo (300) with which the fan (200) is associated, said dynamo (300) powering the cold plasma generation unit (400).

3. Sanitisation system (900) according to any one of the preceding claims, further characterised in that an electronic board (410), apt or configured to transform an AC electric current into DC and to stabilise said electric current at a voltage apt to power the cold plasma generation unit (400) itself, is integrated into the cold plasma generation unit (400).

4. Sanitisation system (900) according to any one of the preceding claims, further characterised in that the cold plasma generation unit (400) comprises a LED-type signalling element or system (420); wherein said signalling element or system (420) is configured to be activated by a passage of an air flow and therefore correlated to the movement of the fan (200).

5. Sanitisation system (900) according to any one of the preceding claims, further characterised in that the cold plasma generation unit (400) comprises a radio unit (430).

6. Sanitisation system (900) according to any one of the preceding claims, further characterised in that the support and retention element (600) is made of a material with elastic properties or is configured to be elastically deformable.

7. Sanitisation system (900) according to any one of the preceding claims, further characterised by the fact that the support and retention element (600) comprises a longitudinally extending element (610) made of a material with elastic properties, said longitudinally extending element (610) having at the upper end an upper appendage (611) and at the lower end a lower appendage (612), both appendagesalso made of a material with elastic properties.

8. Sanitisation system (900) according to any one of the preceding claims, further characterised in that the upper appendage (611) extends along a first plane substantially orthogonal to the plane of extension of the longitudinally extending element (610) and the lower appendage (612) extends along a second plane substantially orthogonal to the plane of extension of the longitudinally extending element (610) and in opposite direction to the direction of extension of the upper appendage (611).

9. Sanitisation system (900) according to any one of the preceding claims, further characterised in that the support and retention element (600) is constituted by an element having a U-shaped profile, i.e. constituted by a longitudinally extending element (610), made of a material with elastic properties, said longitudinally extending element (610) having at the upper end an upper appendage (611) and at the lower end a lower appendage (612), both the appendages being made of a material with elastic properties as well, and wherein the upper appendage (611) extends along a first plane substantially orthogonal to the plane of extension of the longitudinally extending element (610) and the lower appendage (612) extends along a second plane substantially orthogonal with respect to the plane of extension of the longitudinally extending element (610) and in the same direction of extension as the upper appendage (611).

10. Sanitisation system (900) of air according to any one of the preceding claims, wherein said cold plasma generation unit (400) is provided with a pair of electrodes (500) for the production of positive and negative ions.

11. Sanitisation system (900) according to any one of the preceding claims, wherein said fan (200) is operatively associated with said dynamo (300) to convert kinetic energy associated with a rotary motion of the fan (200) into electrical energy.

12. Sanitisation system (900) according to any one of the preceding claims, wherein said support and retention element (600) is configured to be associated with an air conditioning or heating system or a forced air circulation system in indoor environments.

13. Sanitisation system (900) according to any one of the preceding claims, wherein said dynamo (300) and / or said cold plasma generation unit (400) and / or said fan (200) are directly or indirectly fixed to said support and retention element (600).

14. Sanitisation system (900) according to any one of the preceding claims, wherein said support and retention element (600) comprises a longitudinal portion (610),extending predominantly along a longitudinal direction, between an upper end and a lower end; and wherein said support and retention element (600) further comprises an upper appendage (611), which projects from the upper end of the longitudinal portion (610), and a lower appendage (612), which projects from the lower end of the longitudinal portion (610).

15. Air conditioning or heating system or a forced air circulation system in indoor environments that comprises a duct (100) and a sanitisation system (900) according to any one of the previous directions inserted in said duct (100).

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