ITBS20100110A1 - DEVICE FOR VENTILATION OF AN ENVIRONMENT - Google Patents

Description

â € œDevice for the ventilation of an environmentâ €

The present invention relates to a device for the ventilation of an environment. More in detail, the invention refers to a device for the ventilation of large rooms through the use of blades having large extensions and rotating at low speeds.

Numerous environments, such as for example industrial or commercial buildings, warehouses, farms, etc., are typically subject to the undesirable increase in temperature and / or to the stratification of the air and / or to the accumulation of substances generated by the activities carried out in such environments, which can be polluting, harmful and / or unpleasant. These phenomena make similar environments uncomfortable and unsuitable for the stay of people and / or animals. To overcome these problems, artificial ventilation is typically created, i.e. the air is continuously moved inside the environment in order to produce an air circulation that allows for a replacement with the Air outside the room and / or to mix the different layers of air in the room.

To obtain this ventilation, special large-sized fans are typically used, since small-sized fans are unsuitable due to their limited power (which prevents them, for example, from moving large masses of air ) and the need to employ a large number of them.

Typically, fans for large rooms have blades with a high extension, for example varying from one meter to a few meters, and set in continuous rotation at reduced speeds. In fact, what allows the air to be moved effectively in the environment is not so much the rotation speed as mainly the size of the blades. To generate the desired air circulation, and at the same time guarantee the safety of the device and not create annoying and / or harmful drafts of air and / or excessive noise, the blades are rotated continuously, uniformly and at reduced speed ( typically less than 200 rpm).

Ventilation devices are known, such as for example the device described in patent document EP1588024, which have a coupling plate, fixed to the ceiling of the room, a fixed frame, fixed below the coupling plate, which houses a rotary motor, to for example an asynchronous motor, under which a relative speed reducer is mounted. The speed reducer is connected, and transmits the motion, to a rotor carrying a plurality of blades that move the air generating a circulation of the same in the environment.

The Applicant has found that the current devices for the ventilation of large rooms are not free from drawbacks and can be improved under various aspects.

In particular, the Applicant has found that known devices are characterized by an extremely complex structure, comprising for example the fixed frame, the motor and the reducer, which are distinct from each other. This structure, designed to support large blades and to rotate them at low speed, has a high weight and axial dimensions. The high weight is a drawback since, for example, the device installed on the building structure (for example a beam or a slab) can create structural problems in the building itself (even more so when they are installed in the building multiple ventilation devices). Furthermore, the high weight makes it necessary to have a greater dimensioning of the elements of the device itself, since they have to bear this weight. The size of the known devices constitutes a drawback since it limits the applicability of the devices to environments having a minimum height from the ground, so that it is sufficient for installation in safe conditions and / or without reduction of useful space.

Furthermore, the complexity of the mechanical structure and the high weight and overall dimensions complicate assembly, installation and / or maintenance operations and / or can compromise the safety of the operators. A further drawback of known devices is their high cost, due for example to the complexity of the mechanical structure.

A further drawback encountered by the Applicant lies in the high energy consumption of the known devices, due for example to the low energy efficiency (for example of the motor and / or reducer) and to the complexity of the mechanical structure.

A further drawback encountered by the Applicant resides in the presence, in known devices, of vibratory phenomena, for example in the fixed frame and / or in the rotating blades.

A further drawback encountered by the Applicant consists in the generation, by known devices, of a noise which can be harmful and / or annoying for people and / or animals present in the environment.

In addition, the aforementioned drawbacks can lead to a lower reliability of the system and / or a greater susceptibility to failures.

A further drawback of the known devices consists in the reduced efficiency (for example in terms of the volume of air moved as a function of the energy supplied to the rotor) of the blades.

A further drawback encountered by the Applicant consists in the difficulty of known devices, for example due to their structure, to integrate other devices or systems necessary for the activities carried out in this environment.

A further drawback encountered by the Applicant resides in the reduced versatility of the known devices, characterized by a not very versatile mechanical structure that does not allow to modify their operation (for example to vary the rotation speed of the blades), based on the different operating conditions and / or installation configurations and / or characteristics of the installation environment, without resorting to complex changes in the structure of these devices, which require high times and / or costs.

A further drawback resides in the difficulty of varying the configuration of the blades (for example type of blades, inclination of the blades around their longitudinal axis, wing surface) according to the type of installation desired and the destination environment.

In this situation, the underlying purpose of the present invention, in its various aspects and / or embodiments, is to provide a device for the ventilation of an environment which may be able to obviate one or more of the aforementioned drawbacks.

This object, and any others, which will become clearer in the course of the following description, is substantially achieved by a device for ventilation according to one or more of the attached claims, each of which taken alone (without its dependencies) or in any combination with the other claims, as well as according to the following aspects and / or embodiments, variously combined, also with the aforementioned claims.

In one aspect, the invention relates to a device for the ventilation of an environment comprising: - a fixing and handling device comprising a fixing portion intended to be stably attached at the top to a fixed structure of the environment, a stator rigidly fixed below said fixing portion, and a rotor rotatably engaged to said stator, said stator being able to rotate said rotor about an axis of rotation;

- a blade holder rotor having a hub mechanically connected to said rotor and a bearing structure fixed to said hub, said fixing and handling device being able to support said blade holder rotor and to rotate it around said rotation axis to move a volume of ™ air of said environment and generate a forced circulation of air in said environment;

- a plurality of blades individually fixed to said supporting structure,

where the blade holder rotor is rotationally integral with the rotor in such a way that, during rotation, the rotation speed of the blade holder rotor is equal to the rotation speed of the rotor.

The Applicant believes that the combination of the aforementioned technical characteristics, in particular the fact that the blade holder rotor is rotationally integral with the rotor so as to rotate integrally with it, for example thanks to the fact that a variator (e.g. reducer) is not interposed. speed, makes the mechanical structure of the device simple and rational (for example with weight and / or axial dimensions and / or reduced costs and / or consumption).

With the expression â € rotationally integralâ € ™ we mean the absence of the degree of rotational freedom (relative) around the axis of rotation. It is observed that the present invention can contemplate the case in which the blade-holder rotor has at least one degree of freedom relative to the rotor different from the aforementioned degree of rotational freedom, for example to orient the blade-holder rotor in space. However, during the operation of the device the rotation of the rotor and the blade holder rotor occurs in unison. In a preferred aspect, the blade holder rotor is completely integral with the rotor, that is, without relative degrees of freedom.

In one aspect said fixing portion comprises a fixing plate having an upper surface and a lower surface to which said stator is rigidly fixed.

In one aspect, said rotor is internally rotatably engaged with said stator, so as to be at least partially wound by the stator itself, and has, on the opposite side with respect to said fixing portion, an end portion for fixing the hub.

In one aspect, said rotor comprises one or more pairs of permanent magnets and said stator comprises one or more pairs of windings, said stator and rotor, forming a brushless motor. Alternatively, the rotor can comprise said windings and the stator called permanent magnets.

In one aspect, the stator comprises a first ring provided with the aforesaid windings.

In one aspect, the first ring is closed at the ends by an upper plate and a lower plate, each of said plates being provided with a respective first seat for housing a bearing. In a preferred aspect, said upper plate coincides with the aforementioned fixing plate. In this way the structure is even simpler and more compact.

In one aspect, the rotor comprises a second ring, for example made of ferromagnetic material, equipped with the aforementioned magnets fixed to it and closed at the ends by an upper hood and a lower hood, each said housing being equipped with a respective second seat for the bearing housing.

In an alternative aspect, said rotor is externally rotatably engaged with said stator, so as to wind the stator itself and present, on the opposite side with respect to said fixing portion, said end portion, said second ring, in this case having such an internal diameter to contain said first ring.

In one aspect, said first and second rings have a respective axial dimension, along a respective central axis, which defines the torque generated by said rotor. Preferably, the ratio between the axial dimension and a radial dimension (orthogonal to the aforementioned central axis) of said first ring is selected between 0.1, preferably 0.25, and 2, preferably 1.5, more preferably 1. In this way, it is possible to obtain the aforementioned low rotation speed while maintaining a high torque, without the use of a reduction gear between the motor and blade holder rotor.

In one aspect, said stator comprises one or more additional first rings having the same technical characteristics of said first ring and mounted stacked together to form an overall stator ring and said rotor comprises one or more additional second rings having the same technical characteristics of said second ring and mounted stacked together to form a rotor ring as a whole, said axial dimension of said stator and said rotor as a whole resulting in an integer multiple value of said predetermined base dimension. In this way the motor made by the stator-rotor coupling is modular and it is possible to configure it, according to the torque required by the application (for example according to the diameter of the blades), adding a suitable number of first and second rings additional (thus varying the axial dimension of the stator and rotor) and leaving the remaining parts of the device unchanged. The ventilation device is thus configurable in terms of torque, while maintaining the speed of rotation of the blades unchanged. Preferably, the first and second additional rings are the same as said first and, respectively, second rings. Preferably, the number of additional first rings coincides with the number of additional second rings.

In one aspect, the fixing and handling device comprises a mounting bracket, fixed to the fixing portion on the opposite side with respect to the stator and equipped with at least one anchoring portion to the fixed structure of the environment to stably constrain the fixing and handling device to the fixed structure.

In one aspect, said fixing and handling device comprises an electronic control unit programmed to power and manage the operation of the ventilation device. In one aspect, the electronic control unit is programmed to allow continuous adjustment of the rotor rotation speed.

In one aspect, the electronic control unit is programmed to detect the absolute or relative angular position of the rotor. In this way the fixing and handling device does not need sensors (for example encoder or resolver) and can be simpler, more reliable and less expensive.

In a further aspect, the invention relates to a device for the ventilation of an environment comprising:

- a fixing and handling device (preferably of the type described above) comprising a fixing portion intended to be fixed (e.g. above) in a stable manner to a fixed structure of the environment, a stator rigidly fixed (e.g. below) to said portion fastening, and a rotor rotatably engaged to said stator, said stator being adapted to rotate said rotor about an axis of rotation;

- a blade-holder rotor (preferably of the type described above) having a hub mechanically connected to said rotor and a bearing structure fixed to said hub, said fixing and handling device being able to support said blade-holder rotor and to rotate it around said axis of rotation to move a volume of air in said environment;

- a plurality of blades individually fixed to said load-bearing structure, where the load-bearing structure of the blade-holder rotor comprises an upper flange and a lower flange arranged on opposite sides of the hub and integral with it, and a plurality of blade-holder members, each carrying a respective blade , interposed between said upper and lower flanges and fixed thereto, the blade holder members being distributed along a circumference centered on the hub axis.

In one aspect the hub of the blade holder rotor has an upper end and an opposite lower end, along one axis of the hub, at the upper end, and the upper flange is centrally fixed to the upper end of the hub, and the lower flange It is centrally fixed to the lower end of the hub.

In one aspect, each blade holder includes an upper support, fixed above the upper flange, a lower support, fixed below the lower flange, and an anti-vibration element interposed in contact between said upper and lower supports, the upper and lower supports and the anti-vibration element being fixed to each other. This structure can advantageously dampen the vibrations of the ventilation device (for example of the blades, of the blade holder rotor and / or of the fixing and handling device) during its operation.

In one aspect, the upper support and the lower support each comprise a respective first portion configured to be mounted respectively to the upper and lower flange and to be housed in a space between said upper and lower flanges, and a respective second portion radially opposite to said first portion and intended to be fixed to a proximal end of a blade.

In one aspect, the upper and / or lower support is made in the form of a substantially planar plate, the respective first portion having a pair of fins projecting from the prevailing storage plane of the plate in the same half-space with respect to the aforementioned storage plane and defining each a respective height. These fins can contribute to the vibration damping action.

In one aspect the anti-vibration element is a plate, typically planar, and has a respective thickness. In one aspect, the upper and lower flanges are parallel to each other and spaced apart by a distance equal to the sum of the heights of the fins of the upper and lower supports and the thickness of the anti-vibration element. This distance is equal to the axial length of the hub.

In one aspect, the two fins of the upper support have the same height and the two fins of the lower support have the same height, preferably equal to that of the fins of the upper support.

In an alternative aspect, the two fins of the upper support have different heights and the two fins of the lower support have heights equal to and inverted with respect to the two fins of the upper support. In this way the aforementioned lying plane (and therefore the anti-vibration element and the respective blade) of the upper and lower supports is inclined with respect to a horizontal plane (preferably perpendicular to said rotation axis). In this way it is possible to mount the blades with a desired inclination with respect to the horizontal plane (i.e. an inclination obtained by rotation around a respective longitudinal axis of development of the blade) and the inclination of the blades is easily achievable by selecting only the € ™ appropriate height of the fins of the upper and lower supports. Therefore, in one aspect the present invention relates to an assembly comprising the device of the present invention, with the two fins of the upper and lower supports having the same height, and also at least one further set (preferably two further sets) of further upper and lower supports. , equal to the number of blades, as in the last aspect above.

In one aspect, the upper and / or lower flanges have a pair of notches (preferably parallel to each other and / or passing through the respective flange) for each blade holder member and the fins of the upper and / or lower support each have an interlocking portion configured for insert, during assembly, into the respective notch on the respective flange. In this way it is possible to facilitate assembly operations and obtain a more stable assembly.

In one aspect, said stator and said rotor are equipped with a respective coaxial through hole (preferably lying on the aforementioned axis of rotation), the union of the through hole of the stator and the rotor creating an internal channel passing through said fixing portion to said end portion of the rotor. It is observed that in known devices it is not possible to realize the aforesaid internal channel due to the presence of the speed reducer axially interposed between the motor and the blade holder rotor. In one aspect, the hub is equipped with a respective hole, typically coaxial to its axis, passing from the upper end to the lower end and forming a respective internal channel.

In one aspect, the internal channel of the fixing and handling device and the internal channel of the hub form an internal channel as a whole to allow the passage of a conduit or of an electrical and / or optical cable or of a load-bearing element.

In one aspect, the device includes a diffusing system (for example by nebulization) of substances in the environment (e.g. sanitizing substances, insecticides, deodorants) comprising a conduit integral with the fixing portion and crossing said internal channel as a whole in a to come out with a nozzle from the through hole of the hub, at its lower end. In this way the substances are effectively dispersed into the environment because they are diffused (for example nebulized) just under the blades and effectively moved by their rotation.

In one aspect, the device includes an auxiliary system comprising a load-bearing element (for example a bar or a tube and / or an electric or optical cable, preferably inserted in the tube) integral with the fixing portion and passing through said internal channel as a whole so as to come out with an end portion from the through hole of the hub, at its lower end, and comprising one or more accessories, for example light sources (e.g. night, security, directional lamps) or a camera for a video surveillance system , fixed to said lower extremity of the load-bearing element and able to perform certain functions in the environment. In this way the ventilation device advantageously integrates auxiliary systems capable of performing certain functions connected to the activity carried out in the environment where the device is installed.

In one aspect the blades have a longitudinal length, along a longitudinal development axis, greater than or equal to 1m and, preferably, less than or equal to 5m.

In one aspect, each blade is equipped with a front longitudinal edge facing the direction of rotation of the blades around said rotation axis (in practice, the edge that cuts through the air) and with a rear longitudinal edge opposite to it.

In a further aspect, the invention relates to a device for the ventilation of an environment comprising:

- a fixing and handling device (preferably of the type described above) comprising a fixing portion intended to be stably linked to a fixed structure of the environment, a stator rigidly fixed to said fixing portion, and a rotor rotatably engaged to said stator, said stator being able to rotate said rotor about an axis of rotation;

- a blade-holder rotor (preferably of the type described above) having a hub mechanically connected to said rotor and a bearing structure fixed to said hub, said fixing and handling device being able to support said blade-holder rotor and to rotate it around said axis of rotation to move a volume of air in said environment;

- a plurality of blades individually fixed to said load-bearing structure, where each blade comprises an additional wing profile fixed to the blade at the proximal end fixed to the blade holder and extending from the rear longitudinal edge parallel to the aforementioned longitudinal development axis of the blade for a length less than the longitudinal length of the blade. Preferably, the additional airfoil has a concave laminar shape with the concavity facing downwards.

One or more of the above solutions allows to widen the overall wing surface of the blade where the tangential rotation speeds are lower (in the proximal position) and to increase the overall efficiency of air movement of the blade.

Further characteristics and advantages will become clearer from the detailed description of some embodiments, including also a preferred embodiment, exemplary but not exclusive, of a device for the ventilation of a room according to the present invention. This description will be set out below with reference to the accompanying drawings, provided for indicative purposes only and, therefore, not limitative, in which:

- figure 1 is a perspective view of a device for the ventilation of an environment according to the present invention;

Figure 2 is a partial and partial exploded perspective view of the device of Figure 1;

- figure 3 is a sectional view of the fixing and handling device forming part of the ventilation device of figure 1, sectioned along an axial plane;

- figure 4 is an exploded perspective view of a blade holder rotor forming part of the ventilation device of figure 1;

Figure 5 is a partial perspective view of a blade forming part of the device of Figure 1;

- figure 6 is a partial view of the device of figure 1, partially sectioned along two perpendicular axial planes.

With reference to the attached figures, a device for the ventilation of a room according to the present invention is globally indicated with the reference number 1. In general, the same reference number is used for the same or similar elements, possibly in their variants realization.

Device 1 is a ventilation device intended to be installed in a large environment, such as an industrial or commercial building (e.g. workshop, foundry, production plant in general, warehouse, shopping center), a farm, or other environment (e.g. airport, station, gym, etc.). The device described in the present invention allows to obtain a ventilation of this environment by means of the movement of a plurality of blades of high extension, which rotate at reduced speeds.

The device 1 comprises a fixing and handling device 2 comprising a fixing portion 3, intended to be stably attached at the top to a fixed structure (not shown) of the environment, a stator 4 rigidly fixed below the fixing portion 3 and a rotor 5 rotatably engaged to the stator. The stator 4 rotates the rotor 5 about a rotation axis 6. The device 1 comprises a blade holder rotor 50 having a hub 51 mechanically connected to the rotor 5 and a bearing structure 60 fixed to the hub 51. The device 1 further comprises a plurality of blades 80 (preferably in a number greater than or equal to 2 and less than or equal to 10, for example 5) individually fixed to the bearing structure 60 of the blade-holder rotor. The fixing and handling device 2 supports and rotates the blade-holder rotor 50 around the rotation axis 6 to move a volume of ambient air and generate a forced circulation of air in it. Furthermore, the blade holder rotor is rotationally integral with the rotor in such a way that, during rotation, the rotation speed of the blade holder rotor is equal to the rotation speed of the rotor. Preferably, the hub is directly fixed to the rotor, for example by means of a system of screws and threaded holes.

Preferably the fixing and handling device 2 is structured to rotate the rotor at a speed greater than or equal to 50 rpm, preferably greater than or equal to 100 rpm, and / or less than or equal to 400 rpm, preferably less than or equal to 300 rpm, for example about 200 rpm.

Preferably the fixing portion 3 comprises a fixing plate 7 having an upper surface 7a and a lower surface 7b, to which fixing plate 7 the stator 4 is rigidly fixed (for example, the stator is fixed to the lower surface).

Preferably, as in the exemplary embodiment shown in the figures, the rotor 5 is internally rotatably engaged with the stator 4, so as to be at least partially wound by the stator itself, and has, on the opposite side with respect to the fixing portion 3, an end portion 5a for fixing the hub 51.

Preferably the rotor 5 comprises one or more pairs of permanent magnets (not shown, for example of a known type) and the stator 4 comprises one or more pairs of windings (shown schematically, for example of a known type). Preferably, the stator 4 and the rotor 5 thus form a brushless motor.

Preferably, the stator 4 comprises a first ring 11, made for example of ferromagnetic material, equipped with the aforesaid windings. Preferably, the first ring 11 is closed at the ends by an upper plate 12 and a lower plate 13, each provided with a respective first seat for housing a bearing (sliding or rolling). Preferably the plates 12 and 13 close the first ring 11 by means of threaded couplings 14 (for example screws screwed into respective threaded holes of the first ring). Alternatively, the first ring and the upper and / or lower plates can be made in a single piece, for example by casting or mechanical processing.

In a preferred aspect, as in the embodiment in the figure, the upper plate 12 coincides with the aforementioned fixing plate 7, so as to rationalize the fixing and handling device and make the structure simple and compact.

Preferably the lower plate 13 is provided with a through hole 15 (axial for example) which allows the terminal portion of the rotor to be fixed to the hub. This is done, for example, by means of threaded couplings or other connecting elements (e.g. a key or a key).

Preferably the rotor 5 comprises a second ring 21, made for example of ferromagnetic material, equipped with the aforementioned magnets fixed to it (for example by means of resin or glue) and closed at the ends by an upper hood 22 and a lower hood 23, each equipped with a respective second seat for housing a bearing (sliding or rolling). Preferably the caps 22 and 23 close the second ring 21 by means of threaded couplings 24 (for example screws screwed into respective threaded holes of the second ring). Alternatively, the second ring and the upper and / or lower caps can be made in a single piece, for example by casting or mechanical processing. Preferably the first ring 11 has a minimum internal diameter greater than the maximum diameter of the second ring 21, so as to contain it.

Preferably, the first seats of the upper and lower plates correspond respectively to the second seats of the upper and lower covers.

Preferably the fixing and handling device 2 comprises a first and a second bearing 16, 26 (sliding or rolling), where the first bearing 16 is housed in the first seat and in the corresponding second seat and the second bearing 26 is housed in the first headquarters and in the corresponding second location. These bearings, interposed between stator and rotor, support the rotor and allow its correct (e.g. aligned and low friction) rotation with respect to the stator.

In an alternative aspect (not shown), the rotor is externally rotatably engaged with the stator, so as to wrap the stator itself and present, on the opposite side with respect to the fixing portion, the terminal portion. In this case the second ring has an internal diameter such as to contain the first ring.

Preferably, the first and second rings have a respective axial dimension, along a respective central axis, which defines the torque generated by the rotor. Preferably, the ratio between the axial dimension and a radial dimension (orthogonal to the aforesaid central axis) of the first ring 11 is selected between 0.1, preferably 0.25, and 2, preferably 1.5, more preferably 1. Preferably the aforesaid axial dimension is equal to a predetermined base size (for example between 25mm and 300mm, typically about 150mm).

Preferably, the fixing and handling device 2 comprises a mounting bracket 30, fixed (for example by means of a suitable threaded connection) to the fixing portion 3 on the opposite side with respect to the stator 4 (e.g. fixed to the upper surface 7a of the fixing plate 7 ), and equipped with at least one anchoring portion 31 to the fixed structure of the environment (for example a beam or a slab of the building that delimits the environment) to firmly tie the fixing and handling device 2 to the fixed structure . Alternatively, in an embodiment not shown, the mounting bracket is made in one piece with the fixing portion 3 (for example with the aforementioned fixing plate 7).

Preferably, the fixing and handling device 2 comprises an electronic control unit 35 programmed to feed and manage the operation of the device 1. Preferably, the electronic control unit is programmed to allow a continuous adjustment of the rotation speed of the rotor 5.

Preferably, the mounting bracket 30 comprises a housing seat 36 in which the electronic control unit is stably housed and fixed (for example by means of a suitable threaded connection). Alternatively (not shown) the electronic control unit 35 is fixed to the fixing portion 3 of the fixing and handling device 2 (for example to the upper surface 7a of the fixing plate 7).

Preferably, the electronic control unit is programmed to detect the absolute angular position (for example with respect to a reference position) or relative (for example with respect to the stator) of the rotor. In a preferred aspect, as in the embodiment shown in the figures, the bearing structure of the blade-holder rotor comprises an upper flange 61 and a lower flange 62 arranged on opposite sides of the hub and integral with it, and a plurality of blade-holder members 70, each bearing a respective blade 80, interposed between the upper and lower flanges and fixed thereto, the blade holder members being distributed along a circumference centered on the axis of the hub.

Preferably, the hub 51 of the blade-holder rotor 50 has an upper end 52 and an opposite lower end 53, along an axis 54 of the hub 51, at the upper end. Preferably, the upper flange is centrally fixed to the upper end 52 of the hub, and the lower flange is centrally fixed to the lower end 53 of the hub (for example by means of the same fastening members of the hub to the rotor 5 and / or further fastening members 77). Alternatively, the hub 51 can be made in one piece with the upper and / or lower flange. The blade holder members 70 are preferably angularly equidistant around the axis 54 of the hub 51. Preferably, the blade holder members are identical to each other. Typically, the number of blade holders is equal to the number of blades.

Preferably, each blade holder 70 comprises an upper support 71, fixed above the upper flange 61, a lower support 72, fixed below the lower flange 62, and an anti-vibration element 73 interposed in contact between the upper and lower supports, the upper and lower supports and the anti-vibration element being fixed to each other.

Preferably, the upper and lower supports each comprise a respective first portion 71a, 72a mounted respectively to the upper and lower flange and housed in a space between the upper and lower flanges, and a respective second portion 71b, 72b radially opposite the first portion and intended to be fixed to a proximal end of a blade.

Preferably the upper and lower supports are made in the form of a substantially planar plate, the respective first portion having a pair of fins 75 projecting from the prevailing storage plane of the plate (typically orthogonally thereto) in the same half space with respect to the aforementioned storage plane and each defining a respective height (also including the thickness of the support). Preferably the fins 75 are parallel to each other.

Preferably the lower support 72 has the same technical characteristics as the upper support 71, more preferably it mirrors it.

Preferably the anti-vibration element 73 is a plate, typically planar, and has a respective thickness. The anti-vibration element can be made of plastic, rubber, metal or other material suitable for the purpose. Preferably, the anti-vibration element is interposed along its entire length between the upper supports 71 and lower 72 and preferably for the entire length of the latter, preferably so that the supports are not in contact with each other.

Preferably, the upper flanges 61 and lower 62 are parallel to each other (preferably perpendicular to the axis of rotation 6 and 54) and spaced apart by a distance equal to the sum of the heights of the fins 75 of the upper and lower supports and the thickness of the anti-vibration element. This distance is typically equal to the axial length of the hub.

Preferably, the two fins of the upper support have the same height and the two fins of the lower support have the same height, preferably equal to that of the fins of the upper support.

In an alternative embodiment (not shown), the two fins 75 of the upper support 71 have different heights from each other and the two fins of the lower support 72 have heights equal to and inverted with respect to the two fins of the upper support. Preferably the device of the present invention is associated with a plurality (typically two or three) of further sets of further upper and lower supports (the further supports being equal in number to the number of blades), each further set being selectable in order to realize a respective predetermined inclination of the blades. Preferably, the further supports of one of these sets have the fins all of the same height. Preferably, the further supports of a further set have a flap having a height equal to a predetermined first height and the other flap having a height equal to a predetermined third height. Preferably, the supports of a still further set have a fin having a height equal to a predetermined second height, different from the first, and the other fin having a height equal to a predetermined fourth height, different from the third. Preferably, the first and third height and the second and fourth height have a value such as to determine, when the respective blade holder member is assembled to the load bearing structure of the blade holder rotor, an overall height of the blade holder member, in a axial direction perpendicular to the horizontal plane, equal to the axial dimension of the hub. For example, the supports of the set in which the fins have the first and third height make a first inclination of the blade with respect to the aforementioned horizontal plane, while the supports of the set in which the fins have the second and fourth height make a second inclination of the blade with respect to to the aforementioned horizontal plane. In this way it is possible to have sets of upper and lower supports that can be used modularly in each blade holder, once the desired inclination for the respective blade has been established.

Preferably, the upper flanges 61 and / or lower 62 have a pair of notches 66 parallel to each other (preferably passing through the respective flange) for each blade holder 70 and the fins 75 of the upper and / or lower support each have an interlocking portion 76 configured to fit, during assembly, into the respective notch 66 present on the respective flange 61 or 62. It is noted that this interlocking portion does not contribute to determining the aforementioned height of the support flap. Preferably, the blade holder 70 is made in such a way that the second portions 71b and 72b of the upper supports 71 and lower 72 and the anti-vibration element 73 form a polygonal section, by way of example rectangular.

Preferably the fastening of the first portions 71a and 72a of the upper and lower supports to the upper and lower flanges and the fastening of the proximal end 80a of a blade 80 to the second portions 71b and 72b of the upper and lower supports are carried out by means of respective coupling members 77, such as threaded fits, screws, bolts, or welds. Preferably, as shown by way of example in Figures 4 and 6, the coupling members 77 which fix the supports to the flanges, at the same time carry out the assembly of the blade holder 70 (thanks to suitable holes passing through the constituent elements), fixing the reciprocal position of the upper and lower supports and of the anti-vibration element, as well as contributing to the assembly of the flanges and the hub. In this way it is possible to facilitate assembly operations.

If the upper and lower supports are equipped with fins having different heights, the coupling members are preferably suitably configured to allow the inclined assembly of the respective blade (for example the aforementioned through holes in the upper and lower support and in the element vibration dampers are suitably inclined). In addition, the tops of the fins are preferably shaped in such a way as to contact the respective upper or lower flange with a flat surface.

Preferably, the stator 4 and the rotor 5 are provided with a respective through hole 8 and 9 coaxial to each other (preferably lying on the aforementioned rotation axis 6), and the union of the through holes 8 and 9, respectively of the stator 4 and of the rotor 5 form an internal channel 10 passing from the fixing portion 3 to the terminal portion 5a of the rotor 5.

Preferably, the first and second rings 11 and 21, the upper and lower plates 12 and 13, the upper and lower caps 22 and 23 and / or the fixing plate 7 are each provided with a respective through hole (preferably central). Preferably, all the aforementioned holes are coaxial to each other, preferably they are centered on the aforementioned rotation axis 6, and form the aforementioned internal channel 10. Preferably the hub 51 is equipped with a respective hole 55, typically coaxial to its axis 54, passing through from the upper end 52 to the lower end 53 and realizing a respective internal channel. Preferably, the internal channel 10 of the fixing and handling device 2 and the internal channel of the hub 51 form an overall internal channel 20 which allows the passage of a conduit or of an electrical and / or optical cable or of a load-bearing element. Preferably, the internal channel 10 of the fixing and handling device and the internal channel of the hub are coaxial and communicating.

Preferably, as exemplary shown in Figure 6, the device 1 includes a diffuser system 90 (for example by nebulization) of substances in the environment (e.g. sanitizing substances, insecticide, deodorant) comprising a duct 91 integral with the fixing portion 3 and passing through the internal channel as a whole 20 so as to come out with a nozzle 92 from the through hole 55 of the hub 51, at its lower end 53.

Preferably, in an embodiment not shown, the device includes an auxiliary system comprising a bearing element integral with the fixing portion and passing through the internal channel as a whole so as to come out with an end portion from the through hole of the hub, in correspondence with the its lower end, and comprising one or more accessories, for example light sources (e.g. night lamps, security, directional lamps) or a camera for a video surveillance system, fixed to the lower end of the load-bearing element and suitable for carrying out certain functions in the environment. The load-bearing element can be for example a rigid bar or a tube and / or an electrical or optical cable, preferably inserted in the tube. Alternatively, the load-bearing element is the electrical or optical cable itself, when it is able to autonomously support the aforementioned accessory. Preferably the blades 80 have a longitudinal length, along an axis of longitudinal development, greater than or equal to 1m and, preferably, less than or equal to 5m and are arranged with the respective longitudinal development axis parallel or inclined with respect to a horizontal plane (preferably perpendicular to the rotation axis 6).

Preferably each blade 80 is equipped with a front longitudinal edge 81 facing in the direction of rotation of the blades around the rotation axis 6 (in practice, the edge that cuts through the air) and with a rear longitudinal edge 82 to it opposite to. Preferably each blade 80 comprises an additional wing profile 85 fixed to the blade at the proximal end fixed to the blade holder and extending from the rear longitudinal edge parallel to the aforesaid longitudinal axis of development of the blade.

Preferably, the additional airfoil is fixed (for example with screws or rivets) to an upper face 83 of the blade at the rear longitudinal edge 82 of the blade. Preferably, the additional airfoil has a concave laminar shape with the concavity facing downwards.

Preferably the additional airfoil has a length less than or equal to about 3/4 of the longitudinal length of the blade, preferably less than or equal to about half of the longitudinal length of the blade, for example equal to about 1/3 of the longitudinal length of the blade.

In a possible embodiment, the device 1 can advantageously comprise a remote control device, not shown, connected (for example by means of a communication or wireless cable) to the electronic control unit 35, positioned in a point of the environment (where the device 1 Is installed) reachable by a user, and configured to allow that user to remotely manage the operation of the device, for example by setting the torque and / or rotor speed values. Preferably, the remote control device can be configured to control the aforementioned diffuser system and / or auxiliary system.

Claims (10)

CLAIMS 1. Device (1) for the ventilation of a room comprising: - a fastening and handling device (2) comprising a fastening portion (3) intended to be stably constrained to a fixed structure in the environment, a stator (4) rigidly fixed to said fastening portion, and a rotor (5) rotatably engaged to said stator, said stator being adapted to rotate said rotor about an axis of rotation (6); - a blade holder rotor (50) having a hub (51) mechanically connected to said rotor and a bearing structure (60) fixed to said hub, said fixing and handling device being able to support said blade holder rotor and to rotate it around said rotation axis to move a volume of air in said environment; - a plurality of blades (80) individually fixed to said supporting structure, where the load-bearing structure of the blade-holder rotor comprises an upper flange (61) and a lower flange (62) arranged on opposite sides of the hub and integral with it, and a plurality of blade-holder members (70), each carrying a respective blade, interposed between said upper and lower flanges and fixed to them, the blade holder members being distributed along a circumference centered on the axis of the hub, each blade holder member comprising an upper support (71), fixed above the upper flange (61), a lower support ( 72), fixed below the lower flange (62), and an anti-vibration element (73) interposed in contact between said upper and lower supports, the upper and lower supports and the anti-vibration element being fixed to each other. Device (1) according to claim 1, where the upper support (71) and the lower support (72) each comprise a respective first portion (71a, 72a) configured to be mounted respectively to the upper and lower flange and to be housed in a space between said upper and lower flanges, and a respective second portion (71b, 72b) radially opposite to said first portion and intended to be fixed to a proximal end (80a) of a blade. 3. Device (1) according to claim 1 or 2, where the anti-vibration element (73) is a plate, typically planar, and has a respective thickness. 4. Device (1) according to any one of the preceding claims, where the anti-vibration element is interposed between the upper (71) and lower (72) supports for the entire length of the latter. 5. Device (1) according to any one of the preceding claims, where the upper and / or lower support is made in the form of a substantially planar plate, the respective first portion having a pair of fins (75) projecting from the prevailing storage plane of the plate in the same half-space with respect to said storage plane and each defining a respective height. 6. Device (1) according to claim 5, where the two fins (75) of the upper support (71) have the same height and the two fins (75) of the lower support (72) have the same height, preferably the same height of the fins of the upper support, the upper (61) and lower (62) flanges being parallel to each other and spaced apart by a distance equal to the sum of the heights of the fins of the upper and lower supports and the thickness of the anti-vibration element (73). 7. Device (1) according to claim 5, where the two fins (75) of the upper support (71) have different heights from each other and the two fins (75) of the lower support (72) have heights equal to and inverted with respect to the two upper support flaps. Device (1) according to any one of claims 5 to 7, wherein said upper and / or lower flanges have a pair of notches (66) for each blade holder (70) and the fins (75) of the upper support and / or lower each have an interlocking portion (76) configured to fit, during assembly, into the respective notch (66) present on the respective flange. Device (1) according to any one of the preceding claims, wherein each blade (80) is equipped with a front longitudinal edge (81) facing in the direction of rotation of the blades around said axis of rotation (6), with an edge rear longitudinal (82) opposite to it, and includes an additional wing profile (85) fixed to the blade at the proximal end (80a) fixed to the blade holder (70) and extending from the rear longitudinal edge parallel to the aforementioned axis of longitudinal development of the blade for a length less than the longitudinal length of the blade. 10. Assembly comprising the device (1) according to claim 6, further comprising at least one further set of further upper and lower supports, equal to the number of blades, where the two respective fins (75) of the further upper supports (71) have heights different from each other and the two respective fins (75) of the further lower supports (72) have heights equal to and inverted with respect to the two respective fins of the upper supports.