High-efficiency, low-energy impact system for treatment of air with adiabatic humidification with supersaturation and induction air diffusion

Abstract

System (1) for the diffusion of humidified air, comprising: a first conduit (10) for the propagation of an air flow; a second conduit (20) for the propagation of a water flow. The first conduit (10) having a plurality of diffusion holes (11, 12) on its external surface, which allow said air flow to spread into the environment. The second conduit (20) being arranged externally to said first conduit (10). The system (1) includes at least one ejection nozzle (30), in fluid communication with said second conduit (20), and configured to spray / micronize said water flow. The ejection nozzle (30) is arranged externally to said first conduit (10) so that the flow of sprayed / micronized water dispensed by said ejection nozzle (30) is hit at the rear by a part of air flow being diffused via said diffusion holes (11, 12). A plant (100) for the diffusion of humidified air is also described herein.

Description

[0001] HIGH-EFFICIENCY, LOW-ENERGY IMPACT SYSTEM FOR TREATMENT OF AIR WITH ADIABATIC HUMIDIFICATION WITH SUPERSATURATION AND INDUCTION AIR DIFFUSION

[0002] The present invention refers to a system for the diffusion of humidified air.

[0003] The present invention also refers to a plant for the diffusion of humidified air. Ventilation systems comprising an air conduit and a water conduit are known; the air conduit includes a plurality of holes for diffusing the air into the environment, and at least one vent; the water conduit flows into at least one air spraying / micronization nozzle; this nozzle is placed inside the aforementioned vent. The vent is provided with a flow straightener arranged between the inside of the air conduit and the nozzle so that the sprayed / micronized water emitted from the nozzle is hit at the rear by the air flow coming from the flow straightener; the air flow coming from the flow straightener, combined with the sprayed / micronized water emitted from the nozzle, is finally released into the environment further combining with the air diffused through the aforementioned diffusion holes.

[0004] In this context, the Applicant felt the need to study a system that would allow better results to be obtained in terms of humidification, stability and yield. In particular, the object of the present invention is to provide a particularly efficient system for the diffusion of humidified air.

[0005] A further object of the present invention is to provide a system for the diffusion of humidified air with a simple and economical structure.

[0006] These and further objects are substantially achieved by a system for the diffusion of humidified air in accordance with the present invention.

[0007] In accordance with a first aspect, the invention refers to a system for the diffusion of humidified air.

[0008] Preferably, the system comprises a first conduit, for the propagation of an air flow.

[0009] Preferably, the system comprises a second conduit, for the propagation of a water flow. Preferably, said first conduit has a plurality of diffusion holes on one of its external surfaces. Preferably, the diffusion holes allow said air flow to diffuse into the environment.

[0010] Preferably, said second conduit is arranged externally to said first conduit.

[0011] Preferably, said system comprises at least one ejection nozzle. Preferably, said ejection nozzle is in fluid communication with said second conduit.

[0012] Preferably, said ejection nozzle is configured to spray / micronize said water flow.

[0013] Preferably, said ejection nozzle is arranged externally to said first conduit.

[0014] Preferably, the flow of spray ed / micronized water delivered by said ejection nozzle is hit at the rear by a part of the air flow diffused by said diffusion holes.

[0015] In accordance with a second aspect, the object of the invention is a plant for the diffusion of humidified air.

[0016] Preferably, the plant includes the aforementioned system for the diffusion of humidified air. Preferably, the plant includes a first source configured to generate said air flow.

[0017] Preferably, the plant includes a second source configured to generate said water flow.

[0018] In accordance with at least one of the aforementioned aspects, the invention includes one or more of the following preferred features.

[0019] Preferably, said ejection nozzle has a first face facing said first conduit.

[0020] Preferably, said ejection nozzle has a second face opposite to said first face.

[0021] Preferably, said ejection occurs from said second face.

[0022] Preferably, said ejection nozzle is spaced apart from the external surface of said first conduit. Preferably, said diffusion holes comprise a first group of holes arranged on lines substantially parallel to a longitudinal extension of said first conduit.

[0023] Preferably, said diffusion holes comprise a second group of holes arranged on a defined area at said ejection nozzle.

[0024] Preferably, said second conduit comprises a first tract substantially parallel to the longitudinal development of said first conduit.

[0025] Preferably, said second conduit comprises a second tract which lies on a plane substantially orthogonal to the longitudinal development of said first conduit.

[0026] Preferably, the second tract of the second conduit is substantially parallel to the external surface of the first conduit.

[0027] Preferably, said system comprises a plurality of ejection nozzles, each in fluid communication with said second conduit.

[0028] Preferably, said first conduit is made of micro-perforated fabric.

[0029] Preferably, said first conduit is made of perforated fabric.

[0030] Preferably, the sprayed / micronized water exiting the nozzle has, in the vicinity of said nozzle, a determined prevailing direction of propagation. Preferably, said determined prevailing direction of propagation connects the nozzle with the central longitudinal axis of the first conduit on a plane orthogonal to a central longitudinal axis of the first conduit.

[0031] Preferably, said determined prevailing direction of propagation coincides with a prevailing direction of propagation of the air exiting from the diffusion holes located at said nozzle. Additional features and advantages will become more apparent from the detailed description of exemplary embodiments of the invention. This description is provided below with reference to the attached figures, also provided for illustrative purposes and therefore by way of not limiting example, wherein:

[0032] - Figure 1 shows a schematic side view of a system in accordance with the present invention;

[0033] - Figure 2 shows a partial front view of the system in figure 1.

[0034] With reference to the accompanying figures, 1 generally indicates a system for the diffusion of humidified air in accordance with the present invention.

[0035] The system 1 comprises a first conduit 10 for the propagation of an air flow.

[0036] The first conduit 10 may have a circular, semicircular or rectangular cross-section, for example.

[0037] The first conduit 10 has an internal surface, which substantially delimits the volume in which the air flow propagates; the first conduit has an external surface substantially facing the surrounding environment and being in contact with the same.

[0038] The first conduit 10 may be made of a metallic material or a fabric, for example.

[0039] The fabric may be a micro-perforated or a perforated fabric.

[0040] In one embodiment, it is provided the first conduit 10 be made of a fabric and a metallic material. As for the embodiment involved with micro-perforated or perforated fabric, a material processed in such a way as to generate inductive diffusion is preferably used. This type of diffusion, produced by means of calibrated perforation (see diffusion holes 11, 12 described below), makes it possible to trigger displacements of large amounts of room air, avoiding stratification phenomena and uniformity of temperature and humidity inside the room.

[0041] The Applicant notes that, if the first conduit 10 is made of microperforated fabric, it exploits its air permeability over the entire surface of the fabric; preferably, the first conduit 10 made in this way has no additional punctures. The Applicant notes that, if the first conduit 10 is made of perforated fabric, it is preferably composed of a non-permeable or very low permeability fabric, on which the holes, applied according to the need, are drilled.

[0042] In one exemplary embodiment, a bacteriostatic fabric is used, in particular, which is treated with silver ions.

[0043] In one exemplary embodiment, a fire-resistant fabric is used to limit the dangers and / or damages in case of fire in the environment where the system 1 is installed.

[0044] In one exemplary embodiment, a washable fabric is used, which may be easily disassembled and reassembled.

[0045] The Applicant notes that, if the first conduit 10 is made of fabric, it weighs less than sheet metal conduits (for example, approximately 10 times less). For example, the first conduit 10 (in the case of a circular cross-section) may have a diameter between 100 mm and 2,000 mm, preferably between 200 mm and 1,600 mm, more preferably between 300 mm and 1,000 mm, for example equal to approximately 450 mm.

[0046] Preferably, if the first conduit 10 is made of fabric, it is still provided with a bearing / support structure that allows the first conduit 10 itself to have its own defined shape, which remains unchanged in the presence or absence of air flow inside. Therefore, broadly speaking, the first conduit 10 maintains its shape regardless of whether or not air is made to flow in the first conduit 10 itself. This occurs, in particular, whether the first conduit 10 is made of rigid material (as mentioned, for example, metallic material) or is made of fabric.

[0047] The first conduit 10 has a plurality of diffusion holes 11, 12 on its external surface; the diffusion holes 11, 12 allow the air flow to diffuse into the environment.

[0048] More specifically, the diffusion holes 11, 12 comprise a first group of holes 11, arranged on lines substantially parallel to a longitudinal development of the first conduit 10, and a second group of holes 12, arranged on a defined area that is located at a ejection nozzle, as will be better explained later.

[0049] The holes of the second group 12 are characterized by an air outflow speed such as to generate an inductive effect of drawing air from the environment towards the external surface of the first conduit 10.

[0050] The dimensions, density and position of the diffusion holes 11, 12 must be such as to generate an inductive effect (air recall) equal to or greater than 1 :5, preferably equal to or greater than 1 : 10, more preferably equal to or greater than 1 : 15 and even more preferably equal to or greater than 1 :20. Considering, for example, a flow rate in the first conduit 10 equal to 10 m3 / h, the recall of air from the nearby environment must be greater than 50 m3 / h, preferably greater than 100 m3 / h, more preferably greater than 150 m3 / h and even more preferably greater than 200 m3 / h.

[0051] For example, the diffusion holes 11, 12 may have a diameter between 1 mm and 20 mm, preferably between 2 mm and 16 mm, more preferably between 5 mm and 10 mm, even more preferably between 6 mm and 8 mm.

[0052] The Applicant notes that holes with a diameter of 6 mm and 8 mm are suitable, for example, with the first conduit 10 having a diameter between 300 mm and 600 mm, preferably between 350 mm and 550 mm, more preferably between 400 mm and 500 mm, for example equal to approximately 450 mm.

[0053] Broadly speaking, the air pushed into the first conduit 10 comes out from the diffusion holes 11, 12 and is introduced into the area of use.

[0054] The system 1 includes a second conduit 20 for the propagation of a water flow.

[0055] The second conduit 20 is arranged externally to the first conduit 10.

[0056] In one embodiment, the second conduit 20 includes a first tract 21 substantially parallel to the longitudinal development of the first conduit 10, and a second tract 22, which lies on a plane substantially orthogonal to the longitudinal development of the first conduit 10. The second tract 22 of the second conduit 20 may be substantially parallel to the external surface of the first conduit 10.

[0057] Preferably, the second tract 22 completely or partially surrounds the first conduit 10.

[0058] As schematically shown in figures 1-2, the first tract 21 may be arranged along the first conduit 10 and the second tract 22 may be arranged around the first conduit 10. The second conduit 20 is used to supply water aimed at cooling the environment; the water is sprayed or micronized and used in combination with air diffusion.

[0059] For this purpose, the system 1 includes at least one ejection nozzle 30, in fluid communication with the second conduit 20, and configured to spray / micronize the water flow present inside the second conduit 20 itself.

[0060] The ejection nozzle 30 is arranged externally to the first conduit 10, so that the flow of spray ed / micronized water dispensed by the ejection nozzle 30 is hit at the rear by a part of the air flow diffused by the diffusion holes 11, 12.

[0061] More specifically, the ejection nozzle 30 has a first face 31, facing the first conduit 10 (i.e. the external surface of the first conduit 10), and a second face 32, opposite the first face 31; the ejection of spray ed / micronized water occurs from the second face 32.

[0062] The flow of sprayed / micronized water ejected by the nozzle 30 is then hit by the air flow diffused by the diffusion holes 11, 12 in a direction that goes from the first face 31 to the second face 32.

[0063] The second face 32 of the nozzle 30 contains or includes the opening(s) of the nozzle 30 itself through which the sprayed / micronized water is ejected into the environment.

[0064] In one embodiment, the ejection nozzle 30 is spaced apart from the external surface of the first conduit 10.

[0065] Preferably, the sprayed / micronized water exiting the nozzle 30 has, in the vicinity of said nozzle 30, a determined prevailing direction of propagation; in particular, said determined direction joins the nozzle 30 with the central longitudinal axis of the first conduit 10 in a plane orthogonal to the central longitudinal axis of the first conduit 10.

[0066] Preferably, this determined direction coincides with the prevailing direction of air propagation exiting the diffusion holes 12 being arranged at the nozzle 30.

[0067] For example, if we imagine that the water flow sprayed / micronized, in the vicinity of nozzle 30, propagates in various directions, essentially defining a cone in space, with a vertex in the nozzle 30 delivery hole, the determined direction substantially coincides with the central axis of this cone. In the schematization in Figure 1, the propagation cone is represented in a plane orthogonal to the central longitudinal axis of the first conduit 10 by the triangle roughly defined by the arrows exiting the nozzle 30.

[0068] In one embodiment, the ejection nozzle 30 is mounted on the second conduit 20, and specifically on the second tract 22 of the second conduit 20.

[0069] For example, the nozzle 30 may deliver sprayed / micronized water at a pressure between 1 bar and 100 bar, preferably between 50 bar and 90 bar, even more preferably between 70 bar and 85 bar, for example equal to about 80 bar.

[0070] For example, water atomization may achieve particle sizes between 1 micron and 5 microns, preferably between 2 microns and 4 microns, e.g. equal to about 3 microns.

[0071] For example, the diameter of the nozzle outlet hole may be between 0.05 mm and 0.5 mm, preferably between 0.1 mm and 0.4 mm, more preferably between 0.15 mm and 0.2 mm. The Applicant notes that the diameter of the nozzle outlet hole is preferably determined according to the amount of water to be sprayed. For example, the outer diameter of the nozzle may be between 3 mm and 15 mm, preferably between 6 mm and 12 mm, more preferably between 8 mm and 10 mm, for example equal to about 9 mm.

[0072] The nozzle may be connected to the rest of the structure either by threading or by a quick pressure connection.

[0073] The nozzle may be made of stainless steel, or chrome-plated, or brass, or plastic material.

[0074] Preferably, the ejection nozzle 30 is provided with a water filter and / or a spring-loaded check valve with an anti-drip function for optimal misting / micronization.

[0075] From a functional point of view, the Applicant notes that the holes in the second group 12 may have the following two aims: to impart directionality to the air flow recalled by the first conduit 10 by moving the flow of propelled air and the flow of induced air coming out of the holes 12 toward a specific direction; and to allow the diffusion of the air necessary for the evaporation of the water produced by the ejection nozzle 30.

[0076] In practice, the air flowing in the first conduit 10 passes through the holes 12, intercepts the jet emitted by the ejection nozzle 30, and is then distributed into the environment.

[0077] In contrast, the ejection nozzle 30 does its work in a determined air flow generated by the holes of the second group 12 with an air flow so as not to interfere with or stir the spraying / micronization having been produced and thus keeps its efficiency unchanged until completely absorbed by the surrounding air.

[0078] The air surrounding the spraying / micronization (i.e., nozzle 30) is not the only amount introduced by diffusion holes 11, 12 but is the sum of this amount with the amount of air recalled via the flow of the diffusion holes of the first and second groups 11, 12; the Applicant notes that this total air flow is equal to at least 5 times, preferably at least 10 times, more preferably 20 times, and even more preferably at least 50 times, the amount of air exiting from the holes of the second group 12 only.

[0079] The external position of the nozzle 30 with respect to the first conduit 10 allows the spraying / micronization of the water in a greater amount of air than in known systems.

[0080] As a matter of fact, in known systems, the nozzle is typically arranged inside the air conduit; therefore, the water is substantially vaporized within the main air flow thus preventing a direct inductive effect on the nozzle from being produced.

[0081] In contrast, in the solution described and claimed herein, the flow rate increases from 10% to approximately 20% already at a distance of 10 cm from the holes of the second group 12 due to the inductive motions caused by the air escaping from the first conduit 10. The nozzle 30, acting on a greater flow rate due to the inductive effect, is able to spray / micronize more water thus resulting in more air being available.

[0082] This significantly increases the overall efficiency of the system, which, for the same amount of air input into the first conduit 10, may either spray / micronize a greater amount of water, or is able to spray / micronize the same amount of water while needing less air input.

[0083] In addition to the above, the nozzle 30 may be moved further away from the external surface of the first conduit 10 depending on the specific conditions to be achieved and to spray / micronize larger amounts of water into a larger air flow. The position of the nozzle 30 (i.e. the distance from the first conduit 10) is then determined according to the design requirements.

[0084] The Applicant notes that the inductive process is aided by the so-called Coanda effect so that the diffused air, moving along the outer surface of the first conduit 10, is subjected both to a friction force, which slows down the particles immediately in contact with that surface, and to an adhesion force, which attracts them to the surface itself. The layer of air in contact with the external surface of the conduit 10 is then deflected. The external air particles, due to attractive molecular interactions, tend to follow the internal ones. The overall effect is that the layers of diffuse air closest to the outer surface of the first conduit 10 tend to adhere to the surface itself, deflecting their path. All this makes it possible to achieve an air supersaturation regime near the nozzle 30 and to increase the amount of water introduced into the environment with less air in the supply channel. The air flow rate in the first conduit 10, therefore, is lower than in a traditional plant.

[0085] Additionally, lower energy consumption is observed based on the fan affinity law according to which the electrical absorption of a centrifugal fan is proportional to the cube of the volumetric air flow rate. The air flow rate is directly proportional to the number of revolutions of both the axial and centrifugal fan; therefore, for example, if the air flow rate in the first conduit 10 is halved, the power required to move the air decreases by (1 / 2)3= 1 / 8; a 10% reduction in flow rate is equivalent to 27% of fan energy savings.

[0086] The Applicant notes that the inductive phenomenon of air leading to increased air flow at and beyond the nozzle, combined with air micronization and therefore the amount of water that may be introduced through each nozzle, promotes air supersaturation. For example, in a generic closed environment under supersaturation conditions, fog would be present. In contrast, by applying the invention, by virtue of the fact that an induction flow rate increase regime takes place and that in front of the nozzle (or nozzles) there is nothing that prevents the water from evaporating, if one does not consider the inductive phenomenon but only the air flow in the first conduit 10 and the water introduced by the nozzle (or nozzles), an over saturation of air occurs, but without mist. This is the reason why the system is more efficient in terms of humidification.

[0087] Note that, for the sake of simplicity, in the description above reference has been made to a single nozzle; the system 1 may include two or more ejection nozzles suitably arranged depending on the dimensions of the environment in which the system 1 itself is located. Each ejection nozzle preferably has the characteristics herein described and claimed in relation to the ejection nozzle 30; in particular, each ejection nozzle is in fluid communication with the second conduit 20, so as to receive the water to be sprayed / micronized, which is to be introduced into the environment. By way of example only, figure 1 shows two ejection nozzles 30 arranged at angles of 90° and 270° respectively in a reference system centered in the central axis of the first conduit 10 in which the point of contact between the first tract 21 and second tract 22 of the second conduit 20 define the origin of the angles (i.e. the angular position at 0°). However, it is provided that the system 1 be also provided with a greater number of nozzles, suitably arranged according to the requirements of the specific application.

[0088] In particular, in front of the holes of the second group 12, more nozzles 30 may be installed depending on the amount of water required for the expected sensible heat removal being provided by the design and / or due to the request for high relative humidity values.

[0089] The Applicant notes that the inductive effect does not only occur near the ejection nozzle. As mentioned, a number of nozzles necessary for the purpose may be arranged along the first conduit 10. Between one nozzle and the next, the first conduit 10 is drilled (with a different hole compared to the holes of the second group 12) so that the inductive effect homogenizes the humidified air between one nozzle and the next.

[0090] Figure 2 shows schematically a first source 101 configured to generate the air flow that propagates in the first conduit 10, and a second source configured to generate the water flow that propagates in the second conduit 20.

[0091] The first source 101, for example, may be created via one or more fans or other means suitable for generating an air flow adapted for system 1. The second source 102 may be created as a network or a water supply system, suitable for providing the water flow to be propagated in the second conduit 20 for subsequent spraying / micronization by the ejection nozzle 30.

[0092] The first source 101, the second source 102 and the system 1 form a plant 100 for the diffusion of humidified air, which constitutes an aspect of the present invention.

[0093] The Applicant notes that the invention contributes to the elimination of static electricity due to the uniformity of relative humidity inside the rooms in which system 1 is installed. Particular advantages are found in environments at risk of explosion due to the presence of ATEX static electricity. Electrostatic discharge (ESD) is the sudden flow of electricity between two electrically charged objects, caused by contact. ESD occurs when differently charged objects are brought together or when the dielectric between them breaks, sometimes creating a visible spark. However, ESD often occurs without a visible or audible spark. For example, a person carrying a relatively small electrical charge may not feel the discharge, although the latter is sufficient for sensitive electronic components being damaged. This invisible ESD shape may lead to device failure or compromise long-term reliability and performance of electronic devices. The effects of ESD on some electronic components only become visible later in the product's useful life. With a relative humidity of approximately 40%, the surface resistance on floors, carpets, mats and other areas is lowered. Humidifiers add moisture to the air, and the moisture in the air forms a thin protective “layer” on surfaces that acts as a natural conductor for the dissipation of electrical charges. When relative humidity drops below 40%, this protection disappears and normal employee activities result in static-charged objects. Due to the humidification provided by system 1, it is therefore possible to prevent this type of problem.

[0094] From an application point of view, it should be noted that the present invention may be advantageously used in the following areas:

[0095] - Packaging industry (due to the friction that occurs in printing and packaging machines, and in finishing machines that typically run at high speeds, electrostatic charges may severely affect production processes in the packaging industry). Thin materials, labels and synthetic materials such as polypropylene sheets are most affected by unwanted electrostatic charges. Depending on the process, for an optimal flow, a relative humidity between 50% and 60% is necessary, which may be maintained throughout the year due to a constant air humidification system. - Fog rooms (in which, typically, the required internal humidity is between 95-99%).

[0096] - Food industry (several food products require moist air to maintain their freshness and prevent dehydration; for example, bread making is one of the most important food processes where air humidity is crucial: controlled air humidity is necessary to ensure that bread has a crunchy crust and a soft and moist interior. A further example is the production of sweets, such as biscuits, pastries and cakes, which requires the right amount of air humidity to maintain the freshness of the baked goods and may prevent the sweets from becoming too dry).

[0097] - Textile industry (the production of fabrics requires controlled air humidity to guarantee the dimensional stability of the fabrics and to avoid the formation of static electricity; for example, there are plants in which, typically, the internal humidity required by the process is between 50 - 75%).

[0098] - Pharmaceutical industry (in several processes it is necessary to keep the air humid to avoid the dehydration or oxidation of the active ingredients).

[0099] - Woodworking industry (Woodworking requires moist air to prevent the formation of cracks or fissures in the wood. Furthermore, operators working in this area regularly report production problems caused by dry air).

[0100] - Paper industry (paper production requires controlled air humidity to maintain the right consistency of the cellulose pulp and to prevent the paper from cracking or deforming).

[0101] - Production of building materials (controlled air humidity is important during the production of building materials such as concrete and mortar: a sufficiently high level of humidity may prevent these materials from drying out too quickly, ensuring that strength and consistency of the same are uniform).

[0102] - Printing rooms (the inductive capabilities of the system object of the invention allow the hygrometric conditions to be kept constant throughout the treated volume).

[0103] - Tobacco production (humidification and control of air humidity are essential in the production of tobacco, a particularly hygroscopic product).

[0104] - Conservation of cultural heritage (particular humidity conditions are sometimes required. The inductive capabilities allow the hygrometric conditions to be kept constant throughout the treated volume).

[0105] - Printing shops (air humidification and air humidity control is extremely important, since paper is a natural material, particularly sensitive to variations in relative humidity. If the air around the printing presses and in warehouses in which the paper is stored becomes dry, the edges of the paper exposed to the air undergo deformations and tend to roll up).

[0106] In addition to the above, on a more general level, the invention may be useful for the abatement of fine dust suspended in the air due to the increase in humidity inside the rooms. The Applicant notes that, advantageously, the nozzles also perform a scrubber effect: the micronized water expelled from the nozzles incorporates the dust present in the application environment reducing its free presence, increasing healthiness for the operators present in this environment and reducing the dust, which would damage the production and efficiency of the machinery installed there. Furthermore, the fact that the nozzles are placed externally to the first conduit 10 allows for the use of the system for disinfecting industrial environments.

[0107] The Applicant notes that, in the present description, reference has been made to only one first conduit 10 and only one second conduit 20 solely for the sake of explanation. The system 1, and therefore also the plant 100, may be provided with a plurality of first conduits 10 for air and / or a plurality of second conduits 20 for water depending on the needs; additionally, each second conduit 20 may be formed by one or more first tracts 21 and one or more second tracts 22 depending on the distribution pattern of the ejection nozzles 30 to be implemented.

Claims

CLAIMS1. System (1) for the diffusion of humidified air, comprising: a first conduit (10) for the propagation of an air flow; a second conduit (20) for the propagation of a water flow; wherein:- said first conduit (10) has a plurality of diffusion holes (11, 12) on an external surface thereof that allow said air flow to diffuse into the environment;- said second conduit (20) is arranged externally with respect to said first conduit (10);- said system (1) comprises at least an ejection nozzle (30) in fluid communication with said second conduit (20) and configured for spraying / micronizing said water flow;- said ejection nozzle (30) being arranged externally with respect to said first conduit (10), such that the flow of sprayed / micronized water ejected by said ejection nozzle (30) is hit at the rear by a part of the air flow diffused by said diffusion holes (11, 12).

2. System (1) according to claim 1, wherein said ejection nozzle (30) has a first face (31), facing said first conduit (10), and a second face (32), opposite to said first face (31), said ejection being performed by said second face (32).

3. System (1) according to claim 1 or 2, wherein said ejection nozzle (30) is spaced apart from the external surface of said first conduit (10).

4. System (1) according to any one of the preceding claims, wherein said diffusion holes (11, 12) comprise:- a first group of holes (11), arranged on lines substantially parallel to a longitudinal extension of said first conduit (10);- a second group of holes (12), arranged on an area defined at said ejection nozzle (30).

5. System (1) according to any one of the preceding claims wherein said second conduit (20) comprises a first tract (21) substantially parallel with respect to the longitudinal extension of said first conduit (10), and a second tract (22) laying on a plane substantially orthogonal to the longitudinal extension of said first conduit (10).

6. System (1) according to claim 5 wherein the second tract (22) of the second conduit (20) is substantially parallel to the external surface of the first conduit (10).

7. System (1) according to any one of the preceding claims, comprising a plurality of ejection nozzles (30), each in fluid communication with said second conduit (20).

8. System (1) according to any one of the preceding claims, wherein said first conduit (10) is made of a micro-perforated fabric and / or perforated fabric.

9. System (1) according to any one of the preceding claims, wherein the spray ed / micronized water exiting the nozzle (30) has a determined prevailing direction of propagation in the vicinity of said nozzle (30), wherein said determined prevailing direction of propagation joins, on a plane orthogonal to a central longitudinal axis of the first conduit (10), the nozzle (30) with the central longitudinal axis of the first conduit (10).

10. System (1) according to claim 9, wherein said determined prevailing direction of propagation coincides with a prevailing direction of propagation of the air exiting the diffusion holes (12), which are located at said nozzle (30).

11. Plant (100) for the diffusion of humidified air, comprising:- a system (1) according to any one of the preceding claims;- a first source (101) configured to generate said air flow;- a second source (102) configured to generate said water flow.

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