ITMI20111380A1 - PROCEDURE FOR THE REALIZATION OF DUCTING MODULES FOR AIR AND DUCT DISTRIBUTION PLANTS OBTAINED THROUGH THIS PROCEDURE - Google Patents

Description

DESCRIPTION

"PROCEDURE FOR THE REALIZATION OF DUCTING MODULES FOR AIR AND DUCT DISTRIBUTION SYSTEMS OBTAINED BY THIS PROCEDURE"

The present invention relates to a process for manufacturing ducting modules for air distribution and / or diffusion systems and a conduit obtained by means of this process.

In particular, the present invention relates to a process for making ducts used preferably, but not exclusively, for the distribution of treated air for conditioning an environment, such as for example cooled air, hot, filtered air or the like.

Air distribution systems usually include a duct through which an appropriate amount of air is transferred from a device capable of generating an air flow (for example a fan) to an area of use, such as for example a particular environment. such as a room, an office, a laboratory, a shed, or the like.

This ducting is usually made up of one or more transport ducts in sheet metal and one or more terminal diffusion elements, such as perforated diffusion channels in sheet metal or flexible material.

The transport and diffusion ducts can be made of metallic material and respectively have the task of transporting and uniformly diffusing the air in the area of use and, in the case of high induction systems, the metal diffusion channels are equipped with a plurality of diffusion holes arranged along a side wall of the duct itself to introduce air into the environment to be treated.

As is known, each duct, which generally has a substantially tubular conformation with a circular section, is obtained by bending a flat sheet of metal plate.

In particular, the flat sheet, normally with a rectangular plan (if necessary previously perforated) is made to pass through suitable calendering cylinders suitable for bending and giving the circular arched shape to the sheet. Subsequently, respective longitudinal extremity edges are constrained to close the sheet, defining the tubular conformation with a circular section of the duct.

Generally, the longitudinal edges are joined together by crimping and / or welding. In this situation, prior to the calendering step, the sheet is bent at the aforementioned longitudinal edges to create respective folds protruding from opposite faces of the sheet. the lateral wall of the ducting module and are subsequently pressed to define a longitudinal overlap area and irremovable engagement of the edges. Preferably, the duct is also welded at two end points of the longitudinal zone, in such a way as to ensure a stable bond between the two longitudinal edges.

The opposite circular ends of the duct are subsequently folded outwards to define a pair of lateral shoulders protruding radially from the sheet.

In other words, the circular edges defining the ends of the duct are bent to emerge from the outer cylindrical surface of the tubular sheet. In this way, during the installation of the system, the ducts are coupled together, binding the lateral shoulders of two adjacent ducts.

This operation is generally carried out by means of suitable circular bands, surrounding the joining areas of two consecutive ducts to clamp the lateral shoulders of these ducts.

The ducts described above and the related manufacturing process, however, have important drawbacks.

First of all, it should be noted that the air distribution systems can be particularly extensive and therefore composed of a very large number of tubular modules.

Consequently, numerous individual modules have to be transported which, once coupled, will define the channeling, with the consequent disadvantages in terms of overall dimensions and costs in handling and logistics operations.

In this regard, it should be noted that each duct, which defines an internal channel for the passage of air, has substantial volumetric dimensions and consequently the transport of these ducts, as well as being difficult, is particularly expensive given that the volumetric dimensions in general determines the transport costs.

This drawback is also relevant in storage operations. In fact, it should be noted that the ducts cannot be completed and finished during installation. Consequently, numerous ducts are preformed and stored, differentiated according to the various dimensions and uses.

At the most and only where possible, ducts of different diameters are inserted one into the other to try to optimize space and shipping costs.

Furthermore, each module must be suitably packaged and protected to avoid damage during transport.

In this context, the technical task underlying the present invention is to propose a process for manufacturing ducting modules for air distribution systems and a respective module obtained by means of this method, capable of overcoming the aforementioned drawbacks of the known art. In particular, it is an object of the present invention to provide a duct for air distribution and diffusion systems capable of limiting the overall dimensions and also the costs in the respective storage and transport operations.

An object of the invention is then to provide a simple and economical process for making ducts for air distribution systems, and for the protection in transport and ease of installation of such ducts.

In accordance with a 1st independent aspect of the invention, a process is provided for manufacturing ducting modules for air distribution and / or diffusion systems, comprising the steps of preparing a sheet (2) having a substantially flat development; realize means for the constraint (11) in correspondence with respective longitudinal edges (4) opposite of the sheet (2), said longitudinal edges (4) being intended to be coupled in conditions of use of the module, said means for the constraint (11) comprising in particular a predetermined number of holes (16) in correspondence with a longitudinal edge (4) and corresponding holes on the opposite longitudinal edge and even more particularly comprising at least one reference portion (5); and bending said sheet (2) to bring the longitudinal edges (4) closer to each other, defining a substantially tubular shape of the sheet (2) itself; characterized by the fact that said step of bending the sheet (2) is carried out by conforming the sheet (2) with a spiral cross-sectional course with the respective longitudinal edges (4) arranged at different distances from an axis of longitudinal development (X) of the curved sheet metal (2).

In accordance with a 2nd aspect dependent on the 1st aspect, a procedure is provided in which said step of bending the sheet (2) is carried out by calendering the sheet (2) itself; said sheet (2) following the calendering step having a substantially arched conformation with a spiral sectional course with longitudinal edges (4) angularly offset from each other with respect to the longitudinal axis (X).

In accordance with a 3rd aspect depending on the 1st or 2nd aspect, a procedure is provided which also includes, prior to the step of bending the sheet (2), the step of making two lateral sides (6) in correspondence with respective transverse edges (3) to said longitudinal edges (4), said lateral edges (6) emerging in particular radially away from the longitudinal development axis in conditions of use of the module, in particular said step of making the two lateral sides (6 ) comprising the sub-phase of bending each transverse edge (3) perpendicular to the planar development of said sheet (2).

In accordance with a 4th aspect dependent on any of the previous aspects, a procedure is envisaged in which said step of preparing the sheet (2) is carried out by flattening a continuous sheet (2) unwound from a reel and cutting it to obtain a sheet having a substantially quadrangular plan development presenting two longitudinal edges (4) and two transverse edges (3). In accordance with a 5th aspect dependent on any of the previous aspects, a process is provided in which said step of making at least one reference portion (5) is carried out in correspondence with each longitudinal edge (4) and includes the sub-phases of : define on a first surface (2a) of the sheet (2) at least one recessed area (5a) and simultaneously define on a second surface (2b) of the sheet (2), opposite to the first surface (2a), said protruding area (5b ) being insertable in said recessed area (5a) of the reference portion on the opposite edge (4).

In accordance with a 6th aspect dependent on any of the preceding aspects, a process is provided in which said step of producing fastening means (11) comprises the sub-step of defining at least one through hole (16) in correspondence or proximity to each reference portion (5).

In accordance with a 7th aspect dependent on any of the previous aspects, a procedure is provided which also includes the step of inserting at least one further sheet (2) into an internal channel (8) of a spiral-shaped sheet (2) spiral shaped to define a transport and storage condition of a plurality of modules (1).

In accordance with an 8th aspect dependent on any of the preceding aspects, a procedure is provided which also includes a phase of implementation of the module (1) presenting the sub-phases of bringing the longitudinal edges (4) closer together to put in place correspondence with each other the respective reference portions (5); constrain the longitudinal edges (4) to each other; and constraining an end of the module to the consecutive end of an adjacent module to define a channeling section; the phases of constraint of the lateral edges (4) and / or of constraint of the ends helping to bring the module back to a substantially circular tubular configuration.

In accordance with an independent 9th aspect, a channeling module is provided for distribution and / or diffusion systems for air comprising a sheet (2) having a substantially rectangular plan development, characterized by the fact that said sheet (2), in a respective non-functioning condition, it has an open tubular conformation and has a spiral pattern in cross section to the axis of the module to define respective longitudinal edges (4) arranged at different distances from a longitudinal development axis (X) of the sheet ( 2), the module having a longitudinal access (17) towards the internal channel (8), preferably the module further comprising lateral sides (6) extending from respective transversal edges (3) to said longitudinal edges (4), said sides (6) ) emerging radially away from the development axis (X).

In accordance with a 10th aspect dependent on the 9th aspect, a Sintrap3itd Ing. Gianmarco Ponzellini Register n ° 90 IBM is foreseen

packing of modules in which said spiral sheet (2) has an internal channel (8) for housing at least one further spiral shaped open tubular sheet (8); said longitudinal edges (4) of the sheet being separated from each other to allow re-insertion / removal of said at least one further sheet (2).

In accordance with an 11th aspect, a method of installation of a duct described in the 9th aspect is provided which includes the steps of joining the respective longitudinal edges (4) of each sheet (2) of a plurality of sheets suitable for defining a channel in which the sheets (2) themselves have a substantially circular and closed transversal development; approaching the sheets (2) in succession in the closed tubular configuration to define a ducting of an air distribution system (1); and constrain the transverse edge (3) of each sheet (2) with the transverse edge (3) of the adjacent sheet (2).

The specified technical task and the specified aims are substantially achieved by a process for manufacturing modules for air distribution systems, comprising the technical characteristics set out in one or more of the appended claims.

Further characteristics and advantages of the present invention will become clearer from the indicative, and therefore non-limiting, description of a preferred but not exclusive embodiment of a process for manufacturing ducts for air distribution systems, as illustrated in the accompanying drawings in which :

Figure 1 is a schematic view of a plant for the production of ducting modules in accordance with the invention;

- figure 2 is a side view of a part of the plant of figure 1;

- figure 3 is a perspective view of a first semi-finished product for the subsequent stages of construction of a duct for air distribution systems;

Figure 4 illustrates a side elevation view of an inverted grille for making the duct for air distribution systems;

- figure 5 is a front elevation view, with some parts removed to better illustrate others, of the duct in the second construction phase of figure 4; - figure 6 is a perspective view of a duct for air distribution systems according to the present invention;

Figure 7 is a perspective view of a series of ducts of the type illustrated in Figure 6, in a respective partial packing step;

figure 7a shows in cross section a plurality of modules inserted one into the other for storage and transport operations;

figure 8 shows a perspective view of an air distribution system composed of a series of ducts of the type illustrated in figure 6;

- Figures 9 and 9a show in section two possible alternative systems of constraint of successive modules;

- figs. 10a-10c show in schematic form the assembly steps of a ducting module.

With reference to the accompanying drawings, a ducting module for air distribution systems in accordance with the present invention has been generally indicated with the number 1.

The module 1 is obtained starting from a sheet 2 having a flat conformation and preferably made of metallic material.

In particular, observing figure 1, we can see how regret for the realization of the spiral ducting module with controlled deformation circumference foresees that a sheet is unrolled from a reel 100 in a continuous manner, the same is flattened and then cut at a station cutting 101; furthermore, in correspondence with this station, suitable reference portions 5 are defined on the sheet, better described below. At this point the sheet 102 of generally rectangular shape with transversal dimensions defined by the transversal dimensions of the reel 100 and longitudinal dimensions chosen at will according to the dimensional requirements of the channel to be made is processed by means of a notching machine 103, that is a machine used in the processing of the sheets. and used to smooth the edges of the sheet itself.

In addition to the notching, regret is also predisposed to make the appropriate holes 15 (if necessary) on the sheet itself at a station 104.

In fact, it should be noted that if the module is intended to define a diffusion channel, it will have the appropriate holes 15 as shown in the figure; vice versa, if the module is intended to define an air transport channel, the perforations will generally be absent.

In this way, at the end of the first processing step of the product itself, a flat sheet with reference portions is obtained, suitably perforated and notched of the desired dimensions to make the channeling module in accordance with the invention.

In this situation a plurality of sheets 105 are stacked together and arranged on suitable platforms 106 (one or more platforms 106 will be available in series according to the loading needs).

In particular, the lifting platforms 106 will be equipped with suitable handling means (such as an overhead crane, roller conveyors or other) to advance the sheets 105 towards the subsequent processing stations along the direction of advancement A.

In this situation a suitable loader (not illustrated as it is of a per se known and conventional type) will be able to pick up the aforementioned sheets 105 one by one to direct them towards a profiling station 107.

In the profiling station 107 the sheet 105 is deformed in such a way that it has two lateral sides 6 at the outlet, which in the finished product will define radially emerging extremity edges to allow the constraint of subsequent modules and therefore define conditioning regret (see figure 8).

It is evident that the operation of making the previously identified reference portions 5 can also be carried out in correspondence with further processing stations, for example in the profiling station, without departing from the scope of the present invention.

It should be specified that, as previously mentioned, the sheet 2 can also be perforated to define a series of air diffusion passages 15. However, for greater clarity, the accompanying figures show sheets 2 without holes, used only for transporting the air (in fact both embodiments are the object of the invention).

The sheet 2 has means for the constraint 11 comprising at least the aforementioned reference portion 5 located at respective longitudinal edges. to the edge of the sheet.

These reference portions 5 are made by means of a drawing step carried out by means of a press not shown as it is of a known type.

In this way, a series of recessed areas 5a are defined in a first surface 2a of the sheet 2, opposed to respective projecting areas 5b extending from a second surface 2b opposite the first surface 2a.

It should be noted that, particularly for channels of large diameter (~ 1500mm), two or more of these reference portions may be adopted for each side. of the aforementioned protruding areas 5b and re-entering 5a. As will be better clarified in the following of the present description, these holes 16 allow the passage of respective coupling members such as screws or similar rivets.

It is also evident that it will be possible to realize reference portions 5 having a completely different geometry and shape from the one illustrated which nevertheless allow the operations described below.

Merely by way of example, it could be envisaged to provide for each longitudinal edge 4 a plurality of single deformations (bosses) arranged along substantially the entire length of the longitudinal edge 4.

Other embodiments will also be possible.

Always referring to Figure 3, it should be noted that the sheet 2 also has two lateral sides 6 made in correspondence with the respective transverse edges 3.

Advantageously, each side wall 6 is defined by a step of bending the respective transverse edge 3 above the first surface 2a of the sheet 2. Preferably, the side walls 6 face each other and extend perpendicularly to the planar development of the sheet 2 Also in this case, the step of bending the transverse edges 3 for defining the aforementioned sides 6 is carried out by means of a press which is not detailed as it is of a known type.

It should also be noted that the sheet 2 may further comprise one or more longitudinal reinforcements 18 (for example of semicircular section) substantially parallel to the edges 3 (and to the shoulders 6 if present) placed between the reference portions 5. These reinforcements 18 (optional) they have the purpose of guaranteeing sufficient structural rigidity of the module, in particular if destined to make channels of large diameter.

The flat sheet 2 described above is subsequently bent to bring the longitudinal edges 4 together, defining a substantially tubular shape of the sheet 2 itself.

More particularly, as is better illustrated in Figures 2, 4 and 5, the flat sheet 2 is made to pass through a series of calendering cylinders 7 adapted to conform the sheet substantially in a tubular shape.

With particular reference to Figure 6, it should be noted that the sheet is folded with the respective first convex surface 2a facing upwards and with the second concave surface 2b facing downwards so that the shoulders 6 take on a curved shape.

Again, during the calendering step, the sheet 2 is bent according to a progressive motion, bringing the respective longitudinal edges 4 together and defining a substantially spiral shape of the sheet 2. It should be noted that the tubular shape of the sheet 2 has a development in spiral cross-section, i.e. with a respective open area 17 defined by the distance between the aforementioned longitudinal edges 4. In this situation, the longitudinal edges 4 are arranged at distances (d; d ') different from an axis of longitudinal development X of the sheet 2.

In any case, the module is left open, for example with longitudinal edges 4 angularly offset a, aâ € ™ with respect to the longitudinal axis X; in other words, the module is presented in section as an open circumference.

Obviously, having left the module open (zone 17) and / or having shaped it as a spiral also involves an angular offset (a, aâ € ™) of the edges 4 (figure 10) with respect to the assembly condition of the edges themselves (figure 10c). In other words, the sheet metal that will define the aforementioned channeling module is suitably deformed in such a way as to assume in section the shape of a screw or spiral with a circumference with precisely controlled deformation. In still other terms, the longitudinal edges 4, in addition to being able to be arranged at different distances from the longitudinal axis of development X of the sheet, can also be angularly offset with respect to the axis X itself.

As is better illustrated in Figure 5, during the calendering step, the shoulders 6 of the sheet 2 are arranged externally to the aforementioned rollers 7. In this way, the action of the rollers 7 takes place directly on the first and second surfaces 2a, 2b, while the shoulders 6 are kept at the ends of a respective roller 7, in such a way as to guide the sheet 2 itself along the calendering direction.

The sheet 2 thus obtained (figure 6) defines an internal channel 8 (open longitudinally due to the spiral section) which in the operating condition of operation of the duct 1, ie when the module is completed, will allow the passage of air.

In other words, it is important to leave the internal channel 8 open with edges offset angularly or longitudinally or even close to each other to already defined a circular cross section, but in any case elastically deformable during transport and / or assembly so as to allow packing. modules and their easier transport with less overall problems.

For example, the maximum diameters of a finished ducting module will be in the order of 1600-1700 mm.

With particular reference to Figure 7a, a transport and storage condition of a series of modules 1, telescopically associated with each other, is illustrated.

In greater detail, always referring to Figure 7a, it should be noted that the internal channel 8 of the outermost sheet metal contains a series of further sheets 2b, 2c, also spiral-shaped.

By way of example only, modules with a final diameter of 250 mm can be packed in numbers of 2, 3 or 4; vice versa diameters between 500 and 800 mm will allow to couple about 10 modules, while diameters of 1600 mm allow to pack from 30 to 50 modules.

In fact, advantageously, the longitudinal edges 4 of the outermost sheet 2a can move away from the longitudinal development axis X to increase the width of the internal channel 8 so as to allow the containment of further sheets.

The realization of each module in the form of a spiral allows the channeling module itself to maintain a certain elasticity of deformation and therefore also allows you to be able to couple by insertion a plurality of modules themselves, going to occupy the same in an optimized way, which would be vice versa impossible if the ducting module was already completely assembled to define a substantially non-deformable circular section (figure 7a).

The plates thus associated are stored or transported to the place of installation where the respective air distribution system 10 is partially illustrated in figure 8.

During installation, the sheets 2a, 2b, 2c are extracted from each other (generally holding the sheet pack with vertical axis, figure 7) and deformed to return to a respective operating condition.

This operating condition is defined simply by joining the opposite longitudinal edges 4 of each sheet 2 in a spiral, to give the sheets 2 themselves a circular and closed transversal development (fig. 10a-10c).

In other words, the longitudinal edges 4 which define the open area 17 of the sheet 2, are anchored to each other to close the sheet 2 itself, defining a tubular structure which will tend to return to a circular section.

In particular, a longitudinal edge 4 is superimposed on the opposite longitudinal edge 4, so as to partially contact the first surface 2a with the second surface 2b. In this way, the projecting portions 5b of the superimposed edge 4 are inserted into the respective recessed portions Sa of the longitudinal edge 4 above (or vice versa) (Figure 10b). Furthermore, locking screws (not shown as of a known type) can be inserted in the hole obtained in the reference portions 5 (or even in proximity to them) suitable for clamping the edges 4 together.

In this condition, the ducts 1 are then approached and constrained at the respective transverse edges 3, to define a succession of ducts 1 defining the aforementioned system 10.

In particular, the shoulders 6 of two adjacent ducts I are approached and anchored by means of a respective clamp 9 which is not illustrated and described in detail as it is of a known type.

The band 9 has a substantially annular shape to extend around the ducts 1, in correspondence with a joining area of the ducts themselves. The band 9 also has respective coupling members to keep the shoulders 6 anchored to each other and to keep the internal channels 8 of the adjacent ducts in fluid communication.

It is quite evident that the tightening by means of the clamps involves the generation of forces, not only of tightening, but also suitable to bring the ducting module back into its circular shape.

Alternatively, engagement elements 9 of a different nature can also be provided to be inserted inside the ducts 1. These elements, schematically illustrated in figures 9 and 9a do not need to be constrained to the shoulders 6 (which may also be absent) and are constrained to the transverse edges 3, in correspondence with the joining area between two ducts 1.

The example of Figure 9 shows an internal element 9 provided with a central reinforcing rib turned towards the outside of the channel; vice versa figure 9a illustrates the use of two half-elements 9a-9b equipped with three reinforcing ribs facing towards the inside of the channel in order to guarantee both an optimal structural reinforcement and the absence of visible discontinuities on the outside of the channel.

It should be noted that the ducts 1 described above can be stored and transported, considerably reducing the overall dimensions.

This advantage is given by the procedure for manufacturing the module 1 which provides for a step of obtaining a semi-finished product consisting of sheet metal 2 having a spiral structure. Said sheet 2 allows the containment of further other sheets 2 always spiral-shaped with circumference under controlled deformation in such a way as to exploit the space defined by the internal channel 8 to contain a predetermined number of sheets 2.

Consequently, the volumetric dimensions given by the presence of numerous ducts 1 are considerably reduced, which are definitively formed, that is to say closed in the tubular conformation, only during their installation.

The packing made protects all the internal sheets from damage due to blows and allows a considerable saving of packing times and costs.

It should also be noted that the procedure is particularly simple and fast in the installation operations, given the structure of the sheet 2 itself. In particular, the presence of the reference portions 5 guarantees an immediate and simple assembly and also a stable bond between the longitudinal edges 4. It should also be noted that the formation of the shoulders 6 prior to the calendering step (in the flat condition of the sheet 2), turns out to be particularly simple and easy.

Furthermore, the use of removable means for the constraint 11 allows at any time to have access to the inside of the duct which is therefore suitable for housing electric cables, pipes, further ducts such as those for compressed air, etc.

Claims (12)

CLAIMS 1. Process for the realization of ducting modules for air distribution and / or diffusion systems, comprising the phases of: - providing a sheet (2) having a substantially flat development and having a first surface (2a) and a second surface (2b) opposite the first surface (2a); - making holes (15) on the sheet metal (2) to define a series of air diffusion passages; - defining means for the constraint (11) at respective opposite longitudinal edges (4) of the sheet metal (2), said longitudinal edges (4) being intended to be joined under conditions of use of the module; - calendering said sheet (2) by passing it through a series of calendering cylinders (7) to bring the longitudinal edges (4) closer together defining a substantially tubular shape of the sheet (2) itself, characterized in that said sheet (2 ), following the calendering phase, assumes a substantially tubular shape and has a sectional conformation with a substantially arched course with longitudinal edges (4) offset angularly (Î ±, Î ± â € ™) from each other with respect to the longitudinal axis (X) . 2. Process according to the preceding claim, characterized by the fact of making two lateral sides (6) in correspondence with respective transversal edges (3) to said longitudinal edges (4), optionally prior to the step of calendering the sheet (2), in particular by bending the respective transverse edge above the first surface (2a), the calendering step by bending the sheet with the respective first surface (2a) convex facing upwards and with the second surface (2b) concave facing the low so that the shoulders assume a curved shape, said lateral sides (6) emerging radially away from the longitudinal development axis in conditions of use of the module. 3. Process according to claim 1 or 2, characterized in that said sheet (2), following the calendering step, has a substantially arched conformation with a spiral sectional course with the respective longitudinal edges (4) arranged at different distances from an axis of longitudinal development (X) of the curved sheet (2). 4. Process according to claim 1 or 2 or 3, characterized in that said step of making the two lateral sides (6) comprises the sub-step of bending each transverse edge (3) perpendicular to the planar development of said sheet (2). 4. Process according to any one of the preceding claims, characterized in that said step of preparing the sheet (2) is carried out by flattening a continuous sheet (2) unwound from a reel and cutting it to obtain a sheet having a substantially quadrangular plan development presenting two longitudinal edges (4) and two transverse edges (3). 5. Process according to any one of the preceding claims, characterized in that it further comprises a step of making at least a reference portion (5) at each longitudinal edge (4). 6. Process according to the preceding claim, characterized in that the step of making at least a reference portion (5) at each longitudinal edge (4) comprises the sub-steps of: defining on a first surface (2a) of the sheet (2 ) at least one re-entering zone (5a) and simultaneously defining on a second surface (2b) of the sheet (2), opposite to the first surface (2a), said protruding zone (5b) being insertable in said re-entering zone (5a) of the reference on the opposite edge (4). 7. Process according to any one of claims 1 to 6, characterized in that said step of providing fastening means (11) comprises the sub-step of defining a predetermined number of holes (16) in correspondence with a longitudinal edge (4) and corresponding holes on the opposite longitudinal edge. 8. Process according to any one of claims 5 or 6, characterized in that said step of providing fastening means (11) comprises the sub-step of defining at least one through hole (16) in correspondence or proximity to each reference portion (5) . Method according to any one of the preceding claims, characterized in that it also comprises the step of inserting at least one further sheet (2) into an internal channel (8) of a sheet (2), in particular spiral-shaped, at least one further sheet (2), in particular spiral shaped, to define a transport and storage condition of a plurality of modules (1). 8. Process according to any one of the preceding claims, further comprising the step of defining one or more longitudinal reinforcements (18) substantially parallel to the transverse edges (3) of the sheet (2), in particular interposed between the reference portions (5). 9. Process according to any one of the preceding claims, characterized in that it further comprises a step for implementing the module (1) presenting the sub-steps of: - bringing the longitudinal edges (4) closer together in order to match the longitudinal edges (4) themselves, and in particular the respective reference portions (5); - constrain the longitudinal edges (4) to each other; and - constrain an end of the module to the consecutive end of an adjacent module to define a channeling section; the phases of constraining the lateral edges (4) and / or constraining the ends, helping to bring the module back to a substantially circular closed tubular configuration. 10. Channeling module for air distribution and / or diffusion systems comprising a sheet (2) having a substantially rectangular plan development, characterized by the fact that said sheet (2), in a respective non-functioning condition, has a conformation open circular tubular and has respective longitudinal edges (4) arranged angularly offset from each other with respect to the longitudinal axis (X) and with respect to the assembly condition of the edges themselves, the module having a longitudinal access (17) towards the internal channel (8) , the module further comprising lateral sides (6) extending from respective transversal edges (3) to said longitudinal edges (4), said sides (6) emerging radially away from the development axis (X), the sheet (2) presenting furthermore holes (15) to define a series of air diffusion passages. Packing of modules according to claim 10, characterized in that said sheet (2) has an internal channel (8) for housing at least one further open tubular sheet (8); said longitudinal edges (4) of the plate being separated from each other to allow the insertion / disengagement of said at least one further plate (2). 12. Method for installing a duct described in claim 10, characterized in that it comprises the steps of: joining the respective longitudinal edges (4) of each plate (2) of a plurality of plates able to define a channel in which the plates (2) themselves have a substantially circular and closed transversal development 5; approaching the sheets (2) in succession in the closed tubular configuration to define a ducting of an air distribution system (1); and constraining the transverse edge (3) of 10 each sheet (2) with the transverse edge (3) of the adjacent sheet (2).