WO2022029559A1

WO2022029559A1 - Ozone sanitization device, preferably hand sanitization device and associated sanitization method

Info

Publication number: WO2022029559A1
Application number: PCT/IB2021/056789
Authority: WO
Inventors: Patrick ORSI
Original assignee: Tecnoscan International S.R.L.
Priority date: 2020-08-07
Filing date: 2021-07-27
Publication date: 2022-02-10
Also published as: EP4192526A1; IT202000019804A1

Abstract

The present invention concerns a sanitisation device (10; 110; 210) for sanitising an object (M) by means of ozone inside a compartment (30) where said ozone is confined. The device (10; 110; 210) comprises: a supporting structure (20) in which said compartment (30) is defined; ozone generation means (12); first generation means (14) for generating an air flow (FA, FB) that passes through the ozone generation means (12) and conveyance means (16) for conveying the ozonised air flow into the compartment (30); conversion means (40) for converting ozone into oxygen; a discharge outlet (42) associated with the conversion means (40). The compartment (30) comprises a treatment area (32) for the object (M) and said treatment area (32) is suited to come into contact with the ozonised air coming from the first generation means (14). The supporting structure (20) comprises an opening (34) for the introduction of the object (M) in the treatment area (32). The device (10; 110; 210) comprises second generation means for generating an air flow (50; 150), suited to generate an air discharge flow (F2; F2') that affects at least one position between the opening (34) and the treatment are (32) and suited to convey the discharge flow towards the ozone conversion means (40) and the discharge outlet (42).

Description

OZONE SANITISATION DEVICE, PREFERABLY HAND SANITISATION DEVICE AND ASSOCIATED SANITISATION METHOD

TECHNICAL FIELD OF THE INVENTION

The present invention relates to a device for sanitising objects by means of ozone.

In particular, the present invention refers to a hand sanitising device.

The invention also refers to a sanitising method associated with this device.

DESCRIPTION OF THE STATE OF THE ART

The use of ozone as a powerful broad- spectrum antimicrobial capable of acting on bacteria, viruses and fungi is known in various sectors. Thanks to its properties, it is applied in a wide range of sanitisation processes to prevent or reduce contamination as much as possible.

Possible contamination can occur when handling objects that are shared with other people, such as the TV remote control, landline or mobile phones, which are a repository for germs and bacteria where staphylococcus Aureus is often detected, a bacterium that can cause dangerous infections.

The parts of the body most exposed to contamination are the hands, so that in particular situations their sanitisation/disinfection becomes a particularly decisive and important factor (for example in healthcare environments or in any environment in the event of pandemics).

The number of times when it is necessary to disinfect hands increases in all healthcare environments, where it is often necessary to do antiseptic washes and/or rub hands with alcohol.

The frequent use of these detergents can lead to more or less frequent skin allergies, depending on the subjects using them. Furthermore, continuous washing and use of detergents can lead to dryness of the skin and/or irritation.

One possible known solution based on ozone for hand sanitisation is described for example in W02007106888A2.

This document describes a device comprising a substantially tight compartment able to keep the ozone inside and defining an internal volume suited to house the object to be sanitised (in particular, a hand). The compartment is equipped with a sealable opening for which at least two configurations are possible, a first open configuration in which the internal volume can receive the object to be disinfected and a second closed, substantially hermetic configuration.

An inlet connector is securely attached to the container and configured to introduce ozone in the internal volume during the treatment process. During the treatment process, the sealable opening is in its second hermetic configuration.

At the end of the treatment, the residual gas mixture is eliminated from the internal volume of the compartment by activating a specific discharge outlet equipped with a carbon filter or other catalyst that converts ozone into oxygen. Once the discharge phase has been completed, the compartment can be opened, and the hand removed. The conversion of ozone into oxygen is a stringent requirement in this type of equipment, since the presence of high concentrations of ozone is detrimental to the health of humans, animals and plants (affects photosynthesis and growth) and causes the deterioration of materials.

However, the sanitising system of the prior art has some drawbacks.

A first drawback of the systems of the prior art is constituted by its complexity of use, given the number of steps necessary to implement the treatment process, that is to say: opening the compartment and keeping it open during the introduction of the hand; hermetically closing the compartment at the wrist; carrying out the sanitising cycle with ozone for a predetermined treatment time; waiting for the residual mixture to be discharged with the conversion of the ozone into oxygen; opening the compartment and removing the sanitised hand.

Another drawback of the device of the known type is the difficulty of hermetically closing the compartment during the treatment process, for example the difficulty of obtaining a perfectly sealed closure around the wrist, with the consequent possible loss and leakage of ozone into the environment.

The main object of the present invention is therefore to solve or at least partially overcome the problems which characterize the solution known in the art.

In particular, a first object of the invention is to provide an ozone sanitisation device which is able to simplify and/or reduce the treatment times compared to the system of the known type.

Another object of the invention is to provide an ozone sanitisation device which is less complex to construct than the system of the known type.

It is a further object of the invention to provide an ozone sanitisation device able to reduce the risk of leaks towards the outside with respect to the system of the known type.

DESCRIPTION OF THE PRESENT INVENTION

According to a first aspect of the present invention, therefore, the subject of the same is a device for the sanitisation of an object by means of ozone inside a confined compartment, said device comprising:

- a supporting structure in which said compartment is defined;

- means for the generation of ozone;

- first generation means for the generation of an air flow that passes through said means for the generation of ozone and means for conveying said ozonised air flow into said compartment;

- means for the conversion of ozone into oxygen;

- a discharge outlet associated with said conversion means; wherein said compartment comprises a treatment area for said object, said treatment area being suited to come into contact with ozonised air coming from said first generation means, said supporting structure comprising an opening for the introduction of said object into said treatment area of said compartment and wherein said device comprises second air flow generation means suited to generate an air discharge flow which affects at least one position between said opening and said treatment area and suited to convey said discharge flow towards said ozone conversion means and said discharge outlet.

Advantageously, the air discharge flow is able to efficiently separate the treatment area from the external environment.

According to a preferred embodiment of the invention, the first means for generating the air flow and the means for conveying the ozonised air flow in the compartment define a closed circuit.

In a preferred embodiment, the second means for generating the air discharge flow comprise air suction means, said suction means being arranged in a discharge channel having the inlet at the level of one side of the opening and ending at the level of the discharge outlet, said suction means and said ozone conversion means being arranged in said discharge channel.

Preferably, the suction means are arranged in the discharge channel downstream of the ozone conversion means or the suction means are arranged in the discharge channel upstream of the ozone conversion means.

According to a preferred embodiment of the invention, the second means for generating the discharge flow are arranged in the supporting structure so as to generate the air discharge flow passing through the opening from a first side thereof to a second side thereof opposite the first side, said air discharge flow being conveyed towards the ozone conversion means which are arranged in a discharge channel having the inlet at the level of the second side of the opening and ending at the level of the discharge outlet.

In a preferred embodiment, the ozone conversion means comprise ozone catalysing means, preferably a catalyst filter.

Preferably, the first air flow generation means and/or the second air flow generation means comprise at least one electric fan.

According to a preferred embodiment of the invention, the device comprises sensor means suited to detect the presence of said object in the treatment area.

In a preferred embodiment, the device comprises power supply means, preferably batteries, and more preferably rechargeable batteries.

Preferably, the ozone generation means comprise ceramic plates powered by a voltage for the emission of electric discharges.

According to a preferred embodiment of the invention, the object to be sanitised is constituted by at least one hand.

The present invention also relates to a method for sanitising an object with ozone in a sanitising device having a compartment where the ozone is confined, said method comprising the following steps:

- inserting said object into a treatment area of said compartment through an access opening of said compartment;

- generating an ozonised air flow and making said ozonised air flow come into contact with said object;

- generating an air discharge flow affecting at least one position between said opening and said treatment area, and conveying said discharge flow towards the means for converting ozone into oxygen and from there towards a discharge outlet;

- subjecting said object to sanitisation by means of said ozonised air flow for a predetermined time interval;

- ending said generation of said ozonised air flow;

- ending said generation of said air discharge flow.

According to a preferred embodiment of the invention, the generation of the air discharge flow starts before the step of generation of an ozonised air flow.

In a preferred embodiment, the step of ending the generation of the air discharge flow takes place after the step of ending the generation of the ozonised air flow.

BRIEF DESCRIPTION OF THE DRAWINGS

Further advantages, objectives and characteristics as well as embodiments of the present invention are defined in the claims and will be clarified below by means of the following description, in which reference is made to the attached drawings; in the drawings, corresponding or equivalent characteristics and/or component parts of the present invention are identified by the same reference numbers. In particular:

- Figure 1 shows an axonometric view of a sanitising device according to a preferred embodiment of the invention;

- Figure 2 shows the sanitising device of Figure 1 during one of its possible uses;

- Figure 3 shows the sectional view along section line 111° - 111° of Figure 2;

- Figure 4 shows the sectional view along section line IV° - IV° of Figure 2;

- Figure 5 shows a variant embodiment of Figure 3;

- Figure 6 shows another variant embodiment of Figure 3.

DETAILED DESCRIPTION OF THE PRESENT INVENTION

Although the present invention is described below with reference to its embodiments shown in the drawings, the present invention is not limited to the embodiments described below and represented in the drawings.

On the contrary, the embodiments described and shown in the drawings clarify some aspects of the present invention, the purpose of which is defined by the claims.

The present invention can be particularly but not exclusively applied for personnel in hospital settings. In particular, the ozone sanitising device according to the invention can be advantageously used to allow the sanitisation of hands in a hospital setting.

However, it should be pointed out that the use of the protection device is not limited to hand sanitisation in hospital settings. On the contrary, the present invention can be conveniently applied in all cases involving the use of a device for sanitising objects that can be positioned inside a compartment, such as work tools of dentists, doctors, veterinarians, hairdressers, beauticians etc., or commonly handled objects such as money, telephones, keys, gym equipment etc. Furthermore, the device according to the invention can be advantageously placed, in addition to hospitals as mentioned above, in health clinics, medical or veterinary or dental practices, nursing homes, hospices, beauty and wellness centres, hair salons, hotels, restaurants, public offices, shopping malls, shops, gyms, sports centres, banks etc.

In general, therefore, the device of the invention makes it possible to equip a facility with a device that can sanitise hands and other small objects. A first embodiment of the ozone sanitising device 10 according to the present invention is described below with reference to Figures from 1 to 4. For the sake of simplicity, in the continuation of this description the ozone sanitising device 10 will be referred to simply as the sanitising device 10.

The sanitising device 10 essentially comprises a supporting structure 20 in which a compartment 30 suited to confine the sanitising gas consisting of ozonised air is defined.

A treatment area 32 is preferably defined inside the compartment 30, said treatment area 32 being suitable for receiving the object M to be treated, for example a hand M with reference to the preferred embodiment shown in Figures from 1 to 5. In the embodiment shown in Figure 6, the treatment area 32 inside the compartment 30 of the sanitising device 210 is preferably shaped so that it can accommodate both hands M.

The treatment area 32 preferably defines the area of the compartment 30 suitable for coming into contact with ozonised air during the sanitising treatment, as better described below.

The treatment area 32 of the compartment 30 can be reached through an opening 34 located in the supporting structure 20.

The treatment area 32 of the compartment 30 and/or the opening 34 will preferably be sized according to the dimensions of the object M, or objects, to be treated (as can be seen for example by comparing Figures 2 and 6).

The sanitising device 10 comprises, first of all, ozone generation means, indicated as a whole with number 12.

In a preferred embodiment, the ozone generation means 12 include an ozone generator using ceramic plates which, stimulated by a high voltage, emit electric discharges which in turn enable the formation of ozone.

In variant embodiments, equivalent generation means can be used such as, for example, a corona effect ozone generator or an ozone generator with UV lamps or an ozone generator based on electrolysis.

In the aforementioned embodiment, the ozone generation means 12 comprise two separate units 12A, 12B suitable for coming into contact with two respective conveyed air flows FA, FB. This is strictly connected to the specific embodiment considered and described below. In variant embodiments, however, there may be a different number of ozone generation units, possibly even only one.

The sanitising device 10 then comprises first generation means 14 suited to generate at least one air flow FA, FB which passes through the ozone generation means 12A, 12B.

As a consequence of the above, preferably, the first generation means 14 generate two separate air flows FA, FB which come into contact with the respective two ozone generation units 12A, 12B.

However, in variant embodiments there may be a different number of flows, possibly even only one.

Conveyance means 16 make it possible to convey the ozonised air flow leaving the two ozone generation units 12A, 12B towards said compartment 30.

The conveyance means 16 preferably comprise respective channels 18 A, 18B which end into suitable areas 20 A, 22 A, 20B, 22B of the outer surface of the compartment 30.

Preferably, the first area 20A, 20B corresponds to the front area of the compartment 30 to define an ozonised air flow which comes into contact with the hand M frontally, preferably coming into contact with the fingernails of the hand M frontally.

Preferably, the second area 22A, 22B corresponds to the lateral area of the compartment 30 to define an ozonised air flow which comes into contact with the hand M laterally, on the right and on the left.

According to the preferred embodiment, the first generation means for generating the air flow 14 and the means for conveying the ozonised air flow 16 define a closed circuit. In fact, the ozonised air is sucked from the compartment 30 through the first air flow generation means 14 and recirculated, generating the two air flows FA, FB for the ozone generation units 12A, 12B.

The first air flow generation means 14 preferably comprise an electric fan.

According to another advantageous aspect of the invention, the sanitising device 10 comprises means for converting ozone into oxygen 40 (Figure 4) and, downstream of said conversion means 40, a discharge outlet 42.

In a preferred embodiment, the ozone conversion means 40 comprise catalyst means, preferably a catalyst filter. The catalyst filter preferably comprises an activated carbon filter.

In variant embodiments, equivalent conversion means may be used such as, for example, a device capable of bubbling ozone in a cold water tank preferably associated with the device, or more preferably supported by the device itself. To improve the conversion efficiency, the water temperature is kept below 40°C. According to one of its advantageous aspects, the sanitising device 10 of the invention comprises second generation means 50 for generating an air flow F2 suited to generate an air discharge flow F2 directed towards the ozone conversion means 40 and from there towards the discharge outlet 42.

The second generation means for generating the air flow 50 preferably comprise an electric fan.

The second generation means for generating the air flow 50 are shaped in such a way that the air discharge flow F2 affects at least one position between the opening 34 and the treatment area 32. In fact, the air discharge flow F2 constitutes an air barrier, and this barrier defines the boundary of the treatment area 32 inside said compartment 30 with respect to the external environment.

The air discharge flow F2 is capable of efficiently separating the treatment area 32 as it prevents the ozonised air inside the treatment area 32 from mixing with the external environment.

In the preferred embodiment illustrated, the discharge flow F2 is defined in such a way as to have an effect substantially at the level of the opening 34 of the supporting structure 20 and in such a way that, advantageously, the treatment area 32 is as wide as possible.

In variant embodiments, however, the discharge flow F2 may be generated by the second generation means 50 towards a more internal position of the compartment 30.

Preferably, according to the illustrated embodiment, the second generation means 50 for generating the air flow F2 comprise air suction means arranged in a discharge channel 60 having the inlet 60 A at the level of one side 34 A of the opening 34 and ending at the level of the discharge outlet 42.

The suction means 50 and the ozone conversion means 40 are both located in the discharge channel 60.

In the illustrated embodiment, the suction means 50 are preferably located downstream of the ozone conversion means 40.

In variant embodiments, however, the suction means may be placed upstream of the ozone conversion means inside the discharge channel.

Advantageously, the air discharge flow F2 which constitutes the air barrier makes it possible to isolate the treatment area 32 inside the compartment 30 from the external environment without necessarily having to hermetically close the opening of the compartment 30 through mechanical means or other types of means such as, for example, the closing systems used in the systems known in the art.

Moreover, advantageously, the sanitising device 10 of the invention makes it possible to simplify and reduce the treatment times.

To carry out a sanitising cycle with the sanitising device 10 of the invention, the hand M is inserted into the treatment area 32 of the compartment 30 through the access opening 34.

The ozonised air flow which comes into contact with the hand M is then generated, preferably by activating the first generation means 14 and the conveyance means 16.

To prevent the ozone from escaping from the compartment 30, the air discharge flow F2 is generated, preferably through the activation of the second generation means 50.

Preferably, the generation of the air discharge flow F2 takes place simultaneously with or before the generation of the ozonised air flow, thus preventing any ozone leakage from the compartment 30 right from the start.

However, the generation of the air discharge flow F2 may be subsequent to the generation of the ozonised air flow, preferably in any case in the order of a few seconds, so as to keep the ozone leakage from the compartment 30 to a minimum.

The hand M is then subjected to sanitising by means of the ozonised air flow for a predetermined time interval, for example about ten seconds.

At the end of the predetermined time interval, the sanitising cycle is considered to have been carried out and the ozonised air flow is stopped, preferably by deactivating the first generation means 14.

The air discharge flow F2 is also stopped, preferably through the deactivation of the second generation means 50.

Preferably, the air discharge flow F2 is stopped a few seconds after the ozonised air flow has been stopped, thus preventing the residual ozone from escaping from the compartment 30 and favouring the conveyance of the residual ozone towards the ozone conversion means 40.

However, the air discharge flow F2 may be stopped a few seconds before or at the same time as the ozonised air flow is stopped, in any case keeping the ozone leakage from the compartment 30 to a minimum.

Therefore, ozone leakages towards the outside are considerably reduced, or totally prevented, compared to the systems of the known type.

Advantageously, the sanitising device 10 of the invention makes it possible to sanitise the hand M by simply inserting and retracting the hand M itself in/from the compartment 30 through the opening 34, without any further ancillary operations.

The same applies in the case of sanitisation of different objects, such as work tools for dentists, doctors, veterinarians, hairdressers, beauticians etc., or objects commonly handled such as money, telephones, keys, gym equipment etc., which can be conveniently positioned inside the compartment, more preferably rested on a special support (not shown) inside the compartment or directly on the base of the compartment.

In a preferred embodiment, in order to automate the treatment as described above, the sanitising device 10 preferably comprises sensor means 80 suited to detect the presence of the hand M (object) at the level of the treatment area 32. Preferably, the sensor means 80 comprise a proximity sensor.

Advantageously, the activation/deactivation of the first generation means 14 and/or of the conveyance means 16 and/or of the second generation means 50 to carry out the treatment on the hand/object takes place automatically following the detection of the presence or absence of the hand/object in the compartment 30 by the sensor means 80.

Preferably, the various components which require an electrical power supply, for example the fans and/or the ozone generation means and/or the means for converting ozone into oxygen, are powered by means of a connection to the electrical grid.

In a variant embodiment, preferably, the various components may be powered by means of batteries, more preferably batteries of the rechargeable type. In this case, the sanitising device can advantageously constitute a portable system.

A second embodiment of the sanitising device 110 according to the present invention is described with reference to Figure 5. The component parts equivalent to those of the preferred embodiment described above are indicated with the same reference numbers.

The sanitising device 110 differs from the sanitising device 10 previously described for the different way of obtaining the air discharge flow F2'.

The air discharge flow F2' is preferably obtained by means of second generation means 150 for generating an air flow F2' which advantageously constitute an air barrier, as previously explained.

The second means for generating the air discharge flow 150 according to this embodiment are arranged in the supporting structure 20 in such a way as to generate said air discharge flow F2' which passes through the opening 34 from one first side 34B thereof to a second side 34A thereof, opposite the first side.

The air discharge flow F2' is conveniently conveyed towards the ozone conversion means 40 which are arranged in the discharge channel 60. The discharge channel 60 has the inlet 60A at the level of the second side 34A of the opening 34 and ends at the level of the discharge outlet 42.

The second air generation means 150 are preferably housed inside a supply channel 160 which has a suction inlet 160 A and ends at the level of the first side 34B of the opening 34.

The second air flow generation means 150 preferably comprise an electric fan. This embodiment allows the same advantages described above with reference to the first embodiment to be obtained.

Figure 6 shows a third embodiment of the sanitising device 210 according to the present invention. The component parts equivalent to those of the first embodiment previously described with reference to Figures from 1 to 4 are indicated by the same reference numbers.

The sanitising device 210 differs from the sanitising device 10 previously described with reference to Figures from 1 to 4 substantially only in that it is configured to accommodate both hands M.

The sanitising operations are therefore further speeded up.

It has therefore been shown, by means of the preceding detailed description of the embodiments of the sanitising device according to the present invention shown in the drawings, that the device according to the present invention allows the intended objectives to be achieved. In particular, the device according to the present invention makes it possible to simplify and/or reduce the ozone treatment times with respect to the systems of the known type.

Although the illustrated and previously described embodiments refer to a compartment that defines a treatment area consisting of a single space, it should be noted that in variant embodiments the treatment area could be divided into several spaces to treat, for example, two or more objects separately and/or simultaneously. In this case, the modifications to be made to the device are within the reach of the expert in the sector. Although the present invention has been clarified above by means of the detailed description of its embodiments represented in the drawings, the present invention is not limited to the embodiments represented in the drawings and previously described. On the contrary, the scope of the present invention is defined by the claims.

Claims

1. Device (10; 110; 210) for the sanitisation of an object (M) by means of ozone within a compartment (30) in which said ozone is confined, said device (10; 110; 210) comprising:

- a supporting structure (20) in which said compartment (30) is defined;

- ozone generation means (12);

- first generation means (14) suited to generate an air flow (FA, FB) that passes through said ozone generation means (12) and conveyance means (16) suited to convey said ozonised air flow into said compartment (30);

- conversion means (40) suited to convert ozone into oxygen;

- a discharge outlet (42) associated with said conversion means (40); characterized in that said compartment (30) comprises a treatment area (32) where said object (M) is treated, said treatment area (32) being suited to come into contact with the ozonised air coming from said first generation means (14), said supporting structure (20) comprising an opening (34) for the introduction of said object (M) in said treatment area (32) of said compartment (30), and in that said device (10; 110; 210) comprises second air flow generation means (50; 150) suited to generate an air discharge flow (F2; F2’) affecting at least one position between said opening (34) and said treatment area (32) and suited to convey said discharge flow towards said ozone conversion means (40) and said discharge outlet (42).

2. Device (10; 110; 210) according to claim 1, characterized in that said first air flow generation means (14) and said conveyance means (16) suited to convey said ozonised air flow into said compartment (30) define a closed circuit.

3. Device (10; 210) according to any of the preceding claims, characterized in that said second generation means (50) suited to generate said air discharge flow comprise air suction means (50), said suction means being arranged in a discharge channel (60) having the inlet (60A) positioned at the level of one side (34A) of said opening (34) and ending at the level of said discharge outlet (42), said suction means (50) and said ozone conversion means (40) being arranged in said discharge channel (60).

4. Device (10; 210) according to claim 3, characterized in that said suction means (50) are arranged in said discharge channel (60) downstream of said ozone conversion means (40) or said suction means are arranged in said discharge channel upstream of said ozone conversion means (40).

5. Device (110) according to claim 1 or 2, characterized in that said second generation means (150) suited to generate said discharge flow (F2’) are arranged in said supporting structure (20) in such a way as to generate said air discharge flow (F2’) that passes through said opening (34) from a first side thereof (34B) to a second side thereof (34A), opposite said first side (34B), said air discharge flow (F2’) being conveyed towards said ozone conversion means (40) which are arranged in a discharge channel (60) having the inlet (60A) positioned at the level of said second side (34A) of said opening (34) and ending at the level of said discharge outlet (42).

6. Device (10; 110; 210) according to any of the preceding claims, characterized in that said ozone conversion means (40) comprise ozone catalysis means, preferably a catalyst filter.

7. Device (10; 110; 210) according to any of the preceding claims, characterized in that said first air flow generation means (14) and/or said second air flow generation means (50; 150) comprise at least one electric fan.

8. Device (10; 110; 210) according to any of the preceding claims, characterized in that it comprises sensor means (80) suited to detect the presence of said object (M) in said treatment area (32).

9. Device (10; 110; 210) according to any of the preceding claims, characterized in that it comprises power supply means, preferably batteries, more preferably rechargeable batteries.

10. Device (10; 110; 210) according to any of the preceding claims, characterized in that said ozone generation means (12) comprise ceramic plates powered by a voltage for the emission of electric discharges.

11. Device (10; 110; 210) according to any of the preceding claims, characterized in that said object (M) is constituted by at least one hand (M).

12. Method for sanitising an object (M) using ozone in a sanitisation device (10; 110; 210) having a compartment (30) where ozone is confined, characterized in that it comprises the following steps:

- inserting said object (M) in a treatment area (32) of said compartment (30) through an access opening (34) of said compartment (30);

- generating an ozonised air flow (FA, FB) and making said ozonised air flow come into contact with said object (M);

- generating an air discharge flow (F2, F2’) affecting at least one position between said opening (34) and said treatment area (32) and conveying said discharge flow (F2, F2’) towards conversion means (40) suited to convert ozone into oxygen and then towards a discharge outlet (42);

- subjecting said object (M) to sanitisation through said ozonised air flow for a predetermined time interval; - ending said generation of said ozonised air flow (FA, FB);

- ending said generation of said air discharge flow (F2, F2’).

13. Method according to claim 12, characterized in that said generation of said air discharge flow (F2, F2’) starts before said step of generation of an ozonised air flow (FA, FB).

14. Method according to claim 12 or 13, characterized in that said step of ending said generation of said air discharge flow (F2, F2’) takes place after said step of ending said generation of said ozonised air flow (FA, FB).

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