Classifications

• • A—HUMAN NECESSITIES
  • A62—LIFE-SAVING; FIRE-FIGHTING
  • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
  • A62B7/00—Respiratory apparatus
  • A62B7/12—Respiratory apparatus with fresh-air hose
• • A—HUMAN NECESSITIES
  • A62—LIFE-SAVING; FIRE-FIGHTING
  • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
  • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
  • A62B18/006—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort with pumps for forced ventilation
• • A—HUMAN NECESSITIES
  • A62—LIFE-SAVING; FIRE-FIGHTING
  • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
  • A62B9/00—Component parts for respiratory or breathing apparatus
  • A62B9/04—Couplings; Supporting frames

Definitions

• the present invention relates to the general technical field of assisted ventilation devices, such as in particular assisted ventilation air filtration devices.
• the invention relates more particularly to a device with assisted ventilation, individually portable, that is to say portable on it by a user.
• Assisted ventilation devices are already known, which are designed to deliver a flow of forced air to a user in order to provide him with respiratory aid.
• These are typically devices comprising a mask provided with an air outlet, which is intended to be held pressed against the face of the user, so as to cover his nose and his mouth, for example at the help of rubber bands passed around the head of the user.
• the mask is connected to a blower comprising a fan, via a flexible air pipe.
• non-invasive such a device is relatively obstructive for the user. The user cannot easily transport it with him, set it up and use it easily outside his home or a particular place of care without the help of a third party.
• These known devices are therefore generally dedicated to stationary use, typically under professional medical supervision.
• Assisted ventilation air filtration devices are also known. These devices are designed to deliver a forced air flow to a user, from ambient air, which has been filtered beforehand in order to at least partially rid it of certain pollutants. Such devices are more specifically provided to provide respiratory protection for their users, by limiting the inhalation by the latter of respiratory pollutants, fine particles and other substances with potentially deleterious health effects present in the surrounding air.
• Such assisted ventilation air filtration devices typically include an air inlet, a fan to generate a forced air flow from ambient air taken from the immediate environment, one or more filters for filtering the bleed air, and an air outlet via which a flow of forced and filtered air can thus be delivered to the user.
• the air outlet is typically arranged on a part of the mask to be placed on the bottom of the face covering the nose and the mouth, or on a helmet intended to completely envelop the head.
• assisted ventilation air filtration devices aim to overcome a certain number of drawbacks of passive individual respiratory protection equipment, such as conventional filtering masks, for example full-face filtering masks, covering the entire face, or half-masks that cover only a lower portion of the user's face, including the nose and mouth.
• This passive personal respiratory protection equipment is also called “free ventilation”, insofar as the passage of air through the filter is ensured solely due to the respiratory exchanges of the user.
• assisted ventilation air filtration devices Although designed to be worn by their users, and to accompany the latter in the exercise of a professional activity for example, such assisted ventilation air filtration devices nevertheless generally remain cumbersome, unpleasant to use. , impractical to store and transport, and complex to set up correctly for a user unaccustomed to their use. This is why these known devices are generally intended for the protection of users in a professional context, for example for the individual protection of workers and technicians, firefighters, soldiers, etc.
• the above-mentioned assisted ventilation devices are therefore generally designed to be at least partially fixed to the user's head, and cover part or all of the user's face. This last.
• These known devices or devices can thus hinder the visibility of the user and / or his communication with his personal or professional entourage. Partially hiding the face of their user, these devices can also interfere with the proper functioning of electronic facial recognition systems, such as those fitted to telephones or computers.
• their use is sometimes incompatible with the simultaneous wearing of glasses, headgear (hat, cap, helmet, etc.), over- or extra-auricular helmets (audio or sound protection), etc., or still using makeup.
• the objects assigned to the invention therefore aim to provide an answer to the above-mentioned problems, by proposing in particular a new device with assisted ventilation individually portable by a user which, while being particularly easy and pleasant to use, nevertheless ensures a distribution optimum airflow to the user.
• Another object of the invention aims to provide a new device with assisted ventilation of ergonomic design and whose use is particularly simple and intuitive.
• Another object of the invention aims to provide a new assisted ventilation device which contributes to preserving the respiratory health of the user.
• Another object of the invention aims to provide a new assisted ventilation device which is of particularly reliable and robust construction.
• Another object of the invention aims to provide a new assisted ventilation device which can be easily adapted to users of different morphologies.
• Another object of the invention aims to provide a new device with assisted ventilation which can be easily transported or stored after use.
• the objects assigned to the invention are achieved with the aid of an individually portable assisted ventilation apparatus, comprising
• an at least partially annular main body intended to be worn around the neck or the head by a user and including a central front element which comprises at least one air inlet and a fan, and at least two holding branches connected to said front central element and configured to sufficiently surround the neck or the head of the user in order to ensure that the main body is held around the neck or the head of the user,
• an air distribution element including an air distribution outlet configured to blow a flow of air generated by the ventilator towards the airways of the user, said air distribution outlet being designed and configured to be facing and at a distance from said respiratory tract, in a centered manner along a vertical axis included in a median sagittal plane of the user, said air distribution outlet comprising o an air outlet opening of generally ovoid shape or trapezoidal having a longitudinal axis of symmetry oriented to be arranged coplanar with the median sagittal plane of the user when using the device, the air outlet opening having a free area of between 10 cm 2 and 42 cm 2 , and o a porous medium for homogenizing the air flow, which covers said air outlet opening.
• FIG. 1 illustrates, in a schematic front view, a particular embodiment of an assisted ventilation device according to the invention, which device is shown worn by a human user.
• the apparatus constitutes, in this particular embodiment, an air filtration apparatus with assisted ventilation.
• the main body of the device here forms a substantially annular body portable around the neck of the user;
• FIG. 2 illustrates, in a schematic perspective view, the device of Figure 1 worn by a human user around his neck. Air circulation is represented by arrows;
• FIG. 3 illustrates, in a schematic top view, the device of Figures 1 and 2, whose air distribution element, removable in this embodiment, is assembled to the front central element of the main body of the device. Separate from each other in this particular embodiment, the main body holding branches are illustrated here in a deployed configuration;
• FIG. 4 illustrates, in a schematic top view in transverse section A-A (see Figure 9), the device of Figures 1 to 3;
• FIG. 5 illustrates, in a schematic top view, the device of Figures 1 and 4, whose removable air distribution element has been separated, detached, from the front central element of the main body of the apparatus, and is not shown.
• the main body holding branches are shown here in a deployed configuration
• Figure 6 illustrates, in a schematic top view, the device of Figures 1 to 4, whose main body holding branches are here in a folded configuration;
• FIG. 7 illustrates, according to a schematic view in right side perspective, the device of Figures 1 to 5, the air distribution element of which is illustrated separated and remote from the front central element of the main body of the device ;
• Figure 8 illustrates, in a partially exploded right side perspective view, the device of Figures 1 to 7;
• Figure 9 illustrates the device of Figures 1 to 8 according to a left side view in section B-B (see Figure 3) along respective median sagittal planes combined of the main body and the air distribution element;
• FIG. 10 schematically illustrates an enlarged view of part of the apparatus of Figure 9.
• the circulation of air is represented by arrows;
• FIG. 11 schematically illustrates the device of Figures 1 to 10, according to a front view in C-C section (see Figure 3) along a plane orthogonal to a transverse plane of the main body, so as to highlight certain elements aeraulic design internal to the device;
• FIG. 12 illustrates schematically, in a rear view, the apparatus of Figures 1 to 11;
• FIG. 13 illustrates, in a rear view, the air distribution element of the device of Figures 1 to 10, the porous medium having been omitted;
• FIG. 14 illustrates, in a rear view, the air distribution element of the device of Figures 1 to 10.
• the porous medium is this time illustrated, and covers the air outlet opening of the outlet distribution element of the air distribution element;
• Figure 15 illustrates, in a bottom view, the air distribution element of Figure 14;
• FIG. 16 illustrates, in a rear view, a variant of the air distribution element of Figures 13 to 15, in which the air distribution element comprises a series of flow straightening fins air arranged in the internal air duct of the air distribution element, in the vicinity of the air outlet opening of the latter, immediately upstream of the porous medium (which a is omitted in FIG. 16);
• FIG. 17 illustrates, in a perspective view, the air distribution element according to the variant of Figure 16, the porous medium having been omitted so as to reveal the air flow straightening fins .
• the invention relates to a device 1 with assisted ventilation, individually portable, that is to say portable on it by a user (human or possibly animal). It is therefore advantageously active respiratory equipment which is designed and configured to be worn on it by a user, human or animal, and to deliver to this user a flow F of forced air from ambient air. It is preferably a device 1 intended for use in a domestic setting and / or in the context of the exercise of a professional activity, by a user who does not have particular professional skills. in respiratory health.
• the device 1 comprises an at least partially annular main body 2 intended to be worn around the neck (FIGS. 1 and 2) or around the head by a user (or “wearer”). Said main body 2 is therefore intended to be worn around a portion of the user's body which is formed by the user's neck or head.
• the main body 2 of the device 1 therefore has in particular a shape and a mass advantageously adapted to be worn by the user around his neck, or respectively his head.
• the term “annular” advantageously means the fact that the main body 2 advantageously has a ring shape, substantially oval or circular, or even rectangular.
• the term "partially annular” advantageously means a shape open up to a quarter turn of the ring, which, if it were continuous, would then be annular.
• Such an at least partially annular shape of the main body 2 of the device 1 contributes to excellent ergonomics and great comfort of use of the device 1.
• said body Main 2 is more specifically intended (and therefore more specifically designed and configured to) be worn around the user's neck.
• the at least partially annular shape of the main body 2 of the device 1 facilitates not only the positioning, but also the wearing of the main body 2 by the user around his neck, the main body 2 possibly being able to rest at least partly on the shoulders of the user, once set up. Wearing the device 1 is thus particularly comfortable for the user, whose hands can advantageously remain free, the main body 2 of the device 1 advantageously accompanying the movements of the user without interfering with them or hindering them particularly.
• the main body 2 of the device 1 includes a front central element 3, that is to say an element which is intended to be positioned at the front of the body (and in particular the neck or the head) of the user, advantageously substantially centered along a vertical axis (or at the very least orthogonal to a transverse plane of the user) included in a median sagittal plane Ps of the user), when the main body 2 is carried around neck ( Figures 1 and 2) or head by the user.
• the main body 2 of the device 1 further includes at least two holding branches 4, which are connected to said front central element 3, preferably on either side of the latter, said holding branches 4 being configured to surround sufficiently the neck (FIGS.
• the central front element 3 has a front face 5, which is oriented towards the outside of the main body 2 and is intended to be oriented towards the front of the user when using the device 1 .
• the front face 5 advantageously defines a visible external surface portion of the main body 2 (FIGS. 1 and 2 in particular).
• the front central element 3 advantageously has a rear face 6 opposite said front face 5.
• the rear face 6 is oriented towards the inside of the main body 2, and therefore facing the body of the user in use of the device. 1.
• Said rear face 6 advantageously defines a visible inner surface portion of the main body 2, at the very least when the latter is not worn by the user.
• each of the holding branches 4 has an external face 7, which is oriented towards the outside of the main body 2 and which advantageously defines another visible external surface portion of the main body 2, and an opposite internal face 8.
• said internal face 8 advantageously defines another visible internal surface portion of the main body 2, at the very least when the latter is not worn by the user.
• the rear face 6 of the front central element 3 and the internal faces 8 of the retaining arms 4 advantageously have a preferably curved, concave profile, with a concavity oriented towards a free space 9 defined at the center of the main body 2.
• the device 1, the free space 9 is at least partially occupied by the neck or by the head of the user, the internal surface of the main body 2 then being oriented facing the neck or the head of the user.
• the main body 2 is dimensioned so that its internal surface is not in immediate close contact with the neck of the user, when the latter is equipped with the device 1, but that there is on the contrary a certain clearance between the skin of the user's neck and said internal surface, at least on a part of the periphery of the free space 9 in the center of the main body 2 of the device 1 (FIG. 2).
• the wearing comfort of the appliance 1 is thus further improved, by reducing the risk of feeling of strangulation for the user.
• This also advantageously allows the user to wear the device 1 in combination with a scarf wrapped around his neck, in winter for example.
• the front central element 3 of the main body 2 of the device 1 comprises at least one air inlet 10, and a fan 11 (or “motorized fan unit”) to generate a flow F of (forced) air.
• the front central element 3 typically includes a casing 12, one surface of which external advantageously defines an outer envelope of the front central element 3 and therefore in particular said front 5 and rear 6 faces of the latter.
• the housing 12, within which the fan 11 is advantageously arranged, carries or defines said air inlet 10.
• the main body 2 may comprise a protective grille 13 for the air inlet 10 of the front central element 3, said protective grille being pierced with a plurality of 14 through holes.
• the device 1 comprises, in addition to said main body 2, an air distribution element 15 which includes an air distribution outlet 16 configured to blow the flow F of air generated by the fan 11 in airway direction (nose and/or mouth) of the user.
• the air distribution element 15 advantageously constitutes, or at the very least defines, an air diffuser for diffusing the flow F of air in the direction of the respiratory tract of the user.
• the air inlet 10 of the front central element 3, the fan 11 and the air distribution outlet 16 are in airflow communication, so that the fan 11 in operation sucks the surrounding air external to the device 1 via the air inlet 10 in order to blow it in the direction of the air distribution outlet 16.
• the outlet air distribution 16 is designed and configured to be opposite and at a distance from the respiratory tract, in a manner centered along a vertical axis (or at the very least along an axis orthogonal to a transverse plane of the user) included in the user's median sagittal plane Ps, in order to allow a particularly precise and effective distribution of air in the direction of the user's respiratory tract.
• the air distribution outlet 16 is preferentially designed and configured so as to blow the flow F of forced air generated by the fan 11 in a direction ascending or horizontal average in the direction of the user's airways.
• the device 1 is advantageously devoid of any part or element provided, that is to say specifically designed and configured, to come into direct contact with the face (and in particular with the cheeks, chin, eyes, mouth and/or nose) of the user, in particular to guide the flow F of air distributed by the air distribution outlet 16 and/or to ensure airtightness between the air distribution outlet 16 and the user's respiratory tract.
• the device 1 is therefore designed and configured to be worn by the user without contact between the device 1 and the user's face. Wearing the device 1 is thus particularly comfortable, not very obstructive, for the user.
• the air distribution outlet 16 of the air distribution element 15 comprises an air outlet opening 16A (or air outlet orifice), preferably single, which is of generally ovoid or trapezoidal shape having a longitudinal axis of symmetry X-X' which is oriented to be arranged coplanar with the median sagittal plane Ps of the user in use of the device 1 (FIG. 1).
• a “general ovoid shape” means here the fact that the contour of the air outlet opening 16A, seen in projection in a plane, has the general shape of an egg in longitudinal section, which extends along said longitudinal axis of symmetry X-X' between a rounded base (or large base) and an opposite rounded apex (or small base), the rounded base having a greater width than the rounded apex.
• a "general trapezoidal shape” advantageously means the fact that the contour of the air outlet opening 16A, seen in projection in a plane, has the general shape of a trapezium, and more specifically the shape general of an isosceles trapezium.
• the outline of the air outlet opening 16A thus takes the general shape of a convex quadrilateral having two opposite parallel sides, which extends along said longitudinal axis of symmetry X-X' between a large base and a small bottom, two angles adjacent to one and the same of said bases being equal.
• This is a "general" trapezoidal shape in particular in the sense that, as shown in the figures, the angles of the trapezoidal shape are advantageously rounded, so as to connect two adjacent angles to each other by a concavity curve oriented towards the center of the air outlet opening 16A.
• the air distribution element 15 is designed and configured so that in use of the device 1, the air outlet opening 16A is positioned opposite the user's respiratory tract, a large base (rounded base of the general ovoid shape or large base of the general trapezoidal shape) of the air outlet opening 16A being arranged at an altitude lower than a respective altitude of the small base (rounded top of the general shape ovoid or small base of the generally trapezoidal shape) of the air outlet opening 16A.
• the large base of the air outlet opening 16A is advantageously positioned opposite the user's mouth, while the small base of the air outlet opening 16A is advantageously positioned opposite the nose and nostrils of the user.
• the air distribution outlet 16 of the air distribution element 15 further comprises a porous medium 17 for homogenizing the flow F of air which (completely) covers said air outlet opening 16A, it that is to say an element permeable to air which is intended to homogenize the flow F of air exiting through said air outlet opening 16A, and which is arranged facing (or in) said outlet opening d air 16A so as to close, to occupy, the latter in a non-sealed manner to said air flow F.
• the porous medium 17 is advantageously separate from the air outlet opening 16A, to which said porous medium 17 is attached.
• the porous media 17 can be arranged overlapping said air outlet opening 16A, said porous media 17 being secured to the peripheral edge 16B of the air outlet opening 16A, for example by gluing or by welding. .
• the air outlet opening 16A has a generally ovoid or trapezoidal shape having a longitudinal axis of symmetry X-X' oriented to be arranged coplanar with the median sagittal plane Ps of the user in use of the device 1, and a free area of between 10 cm 2 and 42 cm 2 , makes it possible to optimize the quantity of air distributed by the device 1 in the direction of the respiratory tract of the user and actually inhaled by the latter, whereas the device 1 operates as an open system, i.e.
• the implementation of the porous medium 17 covering the air outlet opening 16A of the air distribution outlet 16 of the air distribution element 15 makes it possible to homogenize in a manner of particular interest is the flow F of blown air, in particular in terms of the speed profile of said flow F of air at the outlet of the air distribution element 15, by inducing a controlled air pressure drop. While it is generally sought to limit the air pressure losses within the circuits aunterlics, the apparatus 1 of the invention thus implements, on the contrary, a porous medium 17 intended to voluntarily generate a controlled additional pressure drop at the outlet of the apparatus 1 .
• the air distribution outlet 16 of the air distribution element 15 is typically arranged at an average distance of between 0.5 cm and 15 cm, and more preferably between 1 cm and 6 cm, from the airways of the user, between 80% and 100% (and preferably at least 90%) of the air inhaled by the user can thus advantageously come from the flow F of forced air generated and blown by the device 1.
• the device 1 constitutes more specifically a device 1 assisted ventilation air filtration
• between 80% and 100%, and preferably at least 90% of the air inhaled by the user can thus advantageously come from the flow F of forced purified air generated and blown by the device 1 .
• said device 1 is preferably designed and configured to ensure positioning of the air distribution outlet 16 at an average distance from the respiratory tract of the user which is between 0.5 cm and 15 cm, and preferably between 1 cm and 6 cm.
• such remote positioning can be ensured by adequate sizing of the main body 2 of the device 1, and in particular of the holding branches 4 of the latter, as well as of the air distribution element 15.
• the device 1 can advantageously comprise means for adjusting a distance between the air distribution outlet 16 and the respiratory tract of the user when the latter is wearing the device 1, such as for example adjustment means 33 to adjust a characteristic dimension of the holding branches 4, and more particularly a length of the latter, and/or an altitude adjustment device 35 (or booster) to adjust a positioning altitude of the front central element 3 by relation to the user, as described later.
• the free area of the air outlet opening 16A is more precisely between 10 cm 2 and 35 cm 2 , and more preferably still between 15 cm 2 and 30 cm 2 .
• the air outlet opening 16A has a maximum height H1 max, considered along the longitudinal axis of symmetry X-X' of the air outlet opening 16A, which is between 4 cm and 7 cm, and a maximum width U max, considered along a direction orthogonal to the longitudinal axis of symmetry X-X', which is between 3 cm and 6 cm, preferably between 4 cm and 5 cm.
• the air outlet opening 16A has a free area equal to approximately 20 cm 2 , a maximum height H1 max of 5.7 cm and a maximum width U max of 4.5 cm.
• Such a dimensioning makes it possible to further improve the distribution of the air flow F, in particular in the aforementioned ranges of average distance between the air distribution outlet 16 and the respiratory tract, while allowing a relatively compact dimensioning of the air distribution element 15.
• the porous medium 17 is preferably designed and configured to apply to the flow F of air generated by the fan 11, and reaching the air outlet opening 16A, an air pressure drop of between 5 Pa and 80 Pa, and of preferably between 15 Pa and 20 Pa, which allows optimal homogenization of the profile of the exit speeds of the flow F of air in the direction of the respiratory tract of the user.
• Such an impact in terms of pressure drop can be easily characterized by comparing aeraulic performance measurements of the device 1 taken with and without porous media 17 in the air outlet opening 16A of the air distribution element. air 15.
• the level of aeraulic pressure drop induced by the porous media 17 may depend on the thickness of the porous media 17 to be crossed by the flow F of air, the surface area of the porous media 17, the dimensions of the pores or meshes or even the porosity (or void ratio) of the porous media 17.
• said porous medium 17 has a porosity between 28% and 45%.
• said porous medium 17 comprises at least one piece of fabric (woven or non-woven), preferably with constant stitches.
• said porous medium 17 comprises two pieces of fabric arranged one behind the other in the direction of circulation of the air flow F, and preferably arranged superposed and pressed one against the other.
• said fabric pieces have an identical mesh. He has in fact been observed that such a combination of two pieces of canvas advantageously makes it possible to further improve the homogenization of the flow F of air at the outlet of the air distribution element 15.
• the porous medium 17 may comprise two pieces of identical fabric, each having a mesh which defines a void percentage of 36%, said mesh being formed by interlacing warp yarns and weft yarns with a diameter of 0.100 mm, with a width of mesh of 0.150 mm.
• the piece(s) of fabric is metallic, and more preferably made of stainless steel. This in particular gives the porous medium 17 a very good mechanical robustness, and in particular a very good resistance to tearing and perforation in use, transport, maintenance of the device.
• other materials could be considered as an alternative, such as paper or fabric (based on natural or synthetic fibres).
• the front central element 3 of the main body 2 comprises an air outlet 18, separate from the air distribution outlet 16 of the air distribution element 15.
• the housing 12 advantageously carries or defines said air outlet 18.
• the air inlet 10 of the front central element 3, the fan 11 and the air outlet 18 are in aeraulic communication, so that the fan 11 in operation draws in surrounding air external to the device 1 via said air inlet 10 in order to blow it in the direction of the air outlet 18.
• the air distribution element 15 advantageously comprises an internal air duct 19 to guide the flow F of air generated by fan 11 towards air distribution outlet 16.
• air distribution element 15 further comprises an air intake inlet 20, said internal air duct 19 emerging of the air distribution element 15 on the one hand by the air intake inlet 20, and on the other hand by the air outlet opening 16A of the air distribution outlet 16
• the air distribution element 15 is thus assembled to the front central element 3 to ensure airflow communication between the air outlet 18 of the front central element 3 and the air distribution outlet 16 of the air distribution element 15.
• the front central element 3 of the device 1 comprises a single fan 11 (or motor-fan unit), in air communication with a single air inlet 10 and with a single air outlet 18, via a single internal air duct defined within the front central element 3.
• the front central element 3 of the device 1 could comprise a plurality of fans in aeraulic communication, on the one hand each with the same single air inlet or each with a corresponding separate air inlet and, on the other hand each with the air outlet 18 of the front central element 3.
• the air distribution element 15 is assembled to the front central element 3 in a retractable or removable manner to ensure the aeraulic communication of the outlet 18 of the central front element 3 with said air distribution outlet 16.
• the device 1 is therefore preferably designed and configured so that the air distribution element 15 can move between:
• the device 1 is advantageously designed and configured so that the passage of the air distribution element 15, from said first position to said second position, can therefore be achieved:
• the air distribution element 15 can, for example, be designed and configured to retract inside the front central element 3, or even to be folded against the latter, to move from the first position to the second position.
• the device 1 is advantageously designed and configured in such a way that the passage of the air distribution element 15, from said second position to said first position, can therefore be achieved by assembly, attachment, of the distribution of air 15 and of the central front element 3, or respectively by retracting the air distribution element 15 relative to the central front element 3.
• Such a removable or retractable nature of the distribution element 15 further advantageously improves the ergonomic, easy and pleasant to use character of the device 1.
• the user detach or retract the air distribution element 15, typically when the device 1 is not in operation, so as to free up more space in front of his face in order for example to be able to eat, drink or even chat more easily, and this without necessarily having to detach, remove, beforehand the main body 2 of the device 1 which he wears around his neck or his head.
• the user wishes to use the device 1 again, he then only needs to reposition the air distribution element 15 in its first functional position.
• the removable or retractable nature of the air distribution element 15 also advantageously allows easier storage, with a smaller footprint, of the device 1 after use.
• the air distribution element 15 is removably assembled to the front central element 3, so that the latter can therefore be advantageously completely separated from one another. another by the user (i.e. they can be detached from each other, so as to retain no residual physical link between them).
• This in particular facilitates the maintenance, repair and cleaning of the device 1, the air distribution element 15 thus being able to be detached in order to be washed or discarded after use, or to be replaced by another air distribution element. air 15 in case of wear.
• the main body 2 of the device 1 can be used successively by a plurality of users, for example by several members of the same family, each user then being able to advantageously use the main body 2 in combination with an air distribution element 15 adapted to its particular morphology and/or its needs.
• an air distribution element 15 adapted to its particular morphology and/or its needs.
• the device 1 can thus comprise a "generic" main body 2, which can be used with a range of 15 different and interchangeable air distribution elements.
• the apparatus 1 can advantageously comprise, as in the embodiment illustrated in the figures, means for assembling the air distribution element 15 to said central front element 3 which cooperate magnetically to maintain the air distribution element 15 assembled to the front central element 3, in said first position, and thus ensure the aeraulic communication of the air outlet 18 of the front central element 3 with said air distribution outlet 16.
• said assembly means may comprise on the one hand, one or more permanent magnets arranged within the air distribution element 15, typically in the immediate vicinity of a base 23 of the latter, and on the other hand one or more other permanent magnets arranged within the front central element 3, typically in the immediate vicinity of the upper face 21 of the latter, so that said magnets cooperate (nt) magnetically to maintain the air distribution element 15 assembled to the central front element 3, typically via said base 23.
• the device 1 could comprise assembly means removable from the air distribution element 15 to said front central element 3 by force fitting, by direct screwing of the air distribution element 15 to said front central element 3, by quarter-turn assembly or else by reversible elastic interlocking (clipping).
• the air distribution element 15 is arranged projecting from an upper face 21 of the front central element 3, that is to say projecting from at least a portion of a face of the latter which is intended to be oriented upwards in use of the device 1, and which connects advantageously between them the front 5 and rear 6 faces of the front central element 3.
• the air outlet 18 of the front central element 3 is advantageously carried by (defined by, arranged on or even provided in) said upper face 21 of the front central element 3. This facilitates the design of the device 1, and allows an optimal arrangement of the air distribution element 15 with respect to the channels user's breathing.
• this advantageously allows easy assembly/disassembly or retraction/removal of the air distribution element 15 by the user even when the latter is wearing the main body 2 of the device 1 around his neck or its head, in the preferential case where the air distribution element 15 is assembled to the front central element 3 in a retractable or removable manner.
• the air distribution element 15 extends in height along an axis Y-Y' of average extension which is preferably substantially orthogonal to a transverse plane P1 of the main body 3 of the device. 1, between on the one hand a lower end 22 which defines said base 23, which carries the air intake inlet 20, and at which the air distribution element 15 is connected (or at any least intended to be connected) aeraulically to the air outlet 18 of the central front element 3 and, on the other hand, an upper end 24 opposite.
• the axis Y-Y' of average extension of the air distribution element 15 is advantageously intended to be included in the median sagittal plane Ps of the user (FIGS. 1 and 2).
• the air outlet opening 16A of the air distribution element 15 is inscribed in a mean plane P2 which forms with a straight line D parallel to the axis Y-Y' of mean extension of the air distribution element 15 an angle ⁇ between 0° and 15°, and preferably between 3° and 10° (FIG. 9).
• the longitudinal axis of symmetry X-X' of the air outlet opening 16A of the air distribution outlet 16 is advantageously inscribed in the mean plane P2, or parallel to said means P2. This makes it possible to optimize the arrangement of the air outlet opening 16A with respect to the respiratory tract, and in particular the mouth, of the user.
• the air distribution element 15 advantageously has a hollow shape, that is to say a cavity, which defines said internal ventilation duct 19 for guiding air from the air intake inlet 20 towards the air distribution outlet 16, and which is preferably generally convergent from said lower end 22 towards said upper end 24.
• the air distribution element 15 comprises an airtight front face 25, oriented towards the outside of the device 1 and towards the front of the user in use of the device 1, and which connects the lower end 22 to the upper end 24.
• the air distribution element 15 comprises a rear face 26 opposite said front face 25, said front face 25 and rear face 26 being advantageously interconnected by their respective edges.
• the rear face 26 of the air distribution element 15 carries or defines said air distribution outlet 16.
• the air outlet opening 16A of the air distribution outlet 16 is defined by an orifice formed directly in said rear face 26.
• the upper end 24 of the air distribution element 15 is advantageously closed, airtight.
• the air distribution element 15 preferably comprises a shell 27 which carries the air distribution outlet 16.
• the shell 27 advantageously defines the base 23, the front face 25 and the rear face 26 of the air distribution element 15.
• the shell 27 is advantageously rigid, that is to say substantially devoid of plasticity and substantially not elastically deformable manually by the user, so in particular as to give the element air distribution 15 great robustness in use.
• the shell 27 is made of plastic material.
• the shell 27 of the air distribution element 15 is transparent or translucent, at least locally and preferably mostly if not totally, so as to limit the visual masking of the user's face by the device 1 when using it.
• a transparent or translucent shell 27 can act as a visor and windshield.
• the air distribution element 15 In the preferential case where the main body 2 is intended to be worn around the neck, the air distribution element 15 then being advantageously arranged projecting from the upper face 21 of the front central element 3 as mentioned above. , the air distribution element 15 extends projecting from the front central element 3 over a maximum height H2max preferably between 30 mm and 100 mm, more preferably between 40 mm and 80 mm and for example 59mm or 70mm.
• said maximum height H2max corresponds to the greatest length of the air distribution element 15, measured along its Y-Y' axis of mean extension.
• Such dimensioning advantageously makes it possible to define the air distribution outlet 16 so that it ensures optimum blowing of the flow F of air in the direction of the user's respiratory tract, while nevertheless allowing positioning of the central front element 3 as far as possible from the face of the user, which contributes to great wearing comfort for the device 1.
• the air distribution element 15 is removably assembled to the central front element 3, a the same main body 2 can thus advantageously be associated alternately with air distribution elements 15 of different maximum height H2max, in order to better adapt the device 1 to the morphology of the user.
• the air inlet 10 of the front central element 3 is arranged at an altitude lower than a respective altitude of the air distribution outlet 16 (and therefore of the air outlet opening 16A) of the air distribution element 15, as in the mode of relationship illustrated in the figures, at the very least when the main body 2 of the device 1 is positioned around the neck of the user.
• Such an arrangement advantageously makes it possible to limit the aeraulic pressure losses inside the device 1 and thus limit the power required of the motor of the fan 11 and therefore to limit the nuisances, sound in particular, linked to the wearing of a motor with close to the user's head.
• the use of a lower power motor makes it possible to limit the energy consumption of the device 1 and therefore to increase the autonomy.
• said air inlet 10 is preferably arranged at an altitude higher than a respective altitude of said air distribution outlet 16
• the air inlet 10 of the front central element 3 is carried by the front face 5 of the front central element 3.
• the air inlet 10 is therefore carried by (defined by, arranged on or even provided in) a face of the front central element 3 which, as already mentioned above, is arranged towards the outside of the main body 2 of the device 1 and which is intended to be oriented towards the front of the user in use of the device 1 .
• This allows in particular a simple and effective aeraulic design of the device 1 , as well as the definition of good overall aesthetics for the latter.
• said air distribution element 15 may comprise one or more fins 28 for straightening the air flow F, which are arranged inside the internal air duct 19 of said air distribution element 15.
• the implementation of such fins 28 for straightening the air flow F can advantageously make it possible to further improve the distribution of the flow F in the direction of the user's respiratory tract.
• the air distribution element 15 may comprise a series of fins 28 for straightening the air flow F arranged in the internal air duct 19 at the vicinity of the air outlet opening 16A, immediately upstream of the porous medium 17 (not shown in Figures 16 and 17).
• the fins 28 are arranged parallel to each other, and orthogonal to the axis Y-Y 'of average extension of the air distribution element 15 to homogenize the distribution of the flow F of air in a direction parallel to said Y-Y' axis of mean extension.
• the air distribution element 15 may comprise a series of fins for straightening the flow F of air arranged in the internal air duct 19 in the vicinity of the intake inlet of air 20 from the air distribution element 15 to straighten the flow F of air entering the latter.
• the front central element 3 could comprise a series of fins for straightening the air flow F arranged in the air outlet 18 or in the immediate vicinity of the latter (for example at the inside a discharge inlet of the fan 11), so as to improve the distribution of the flow F of air at the outlet of the fan 11 before said flow F of air enters the air distribution element 15.
• the device 1 more specifically constitutes a device 1 for air treatment with assisted ventilation, and even more preferably an device 1 for filtering air with assisted ventilation.
• the device 1 is therefore designed and configured to deliver to the user a flow F of treated air, and preferably filtered, purified, and forced from ambient air.
• the device 1 advantageously comprises an air filtration device 29, typically including one or more air filters, or is at the very least specifically designed and configured to be used in combination with such an air filtration device. air 29.
• the air filtration device 29 is advantageously arranged inside the front central element 3, between the inlet of air 10 and the air outlet 18 if necessary, upstream and/or downstream of the fan 11 in consideration of the direction of air circulation within the device 1 .
• the air filtration device 29 may comprise one or more air filter(s) 30 advantageously arranged between the air inlet 10 and the fan 11, as in the embodiment illustrated in the figures. , which also makes it possible to limit the risk of fouling of the fan 11 .
• the role of the air filtration device 29 is to separate from the surrounding ambient air, and to retain or destroy, one or more undesirable substances or particles present (s) in suspension, solid(s) or aerosol(s) in the surrounding ambient air, so that the flow F of forced air delivered by the device 1 to the user is depleted, preferably significantly, in substances or unwanted particles initially present in the surrounding ambient air.
• solid particles mention may be made of dust, smoke, solid atmospheric pollutants.
• aerosol refers here preferentially to a set of fine particles, solid or liquid, of a substance or a mixture of substances, suspended in a gaseous medium, and which generally have a negligible falling speed, less than 0.25m/s.
• the air filtration device 30 is designed and configured, typically in terms of choice of filter(s), depending on the level of filtration performance sought for one or more substances to be filtered.
• the air filtration device 29 of the device 1 is designed and configured to retain aerosols.
• it advantageously comprises one or more air filter(s), in particular one or more class P1 and/or class P2 filter(s), as defined in particular in the French standards NF EN 143:2000 and NF EN 143/A1:2006, and which stop at least 80% of aerosols (class P1) or at least 94% of aerosols (class P2).
• they are HEPA filter(s) (ie so-called “High Efficiency Airborne Particle” filter(s)).
• HEPA filter(s) ie so-called “High Efficiency Airborne Particle” filter(s)
• the name HEPA applies to any device capable of filtering, in one pass, at least 99.97% of particles with a diameter greater than or equal to 0.3 ⁇ m.
• the air filtration device 29 can comprise several identical or different air filters 30, such as for example an activated carbon filter arranged upstream of a HEPA filter, or even two HEPA filters arranged one behind the other. Still other filters can be envisaged, depending on the nature of the particles or substances to be filtered, and according to the level of corresponding filtration performance expected, such as for example filters based on polytetrafluoroethylene (PTFE) or ceramic.
• PTFE polytetrafluoroethylene
• the apparatus 1 may comprise a particle sensor and a device for controlling the rotational speed of the fan 11, connected to said sensor of particles and/or of volatile organic compound(s), for adapt the speed of rotation of the fan 11 (and therefore the flow rate of the air flow F generated) according to the content of particles and/or of volatile organic compound(s) in the air to be filtered .
• the device 1 thus advantageously constitutes respiratory protection equipment with assisted ventilation, the use of which contributes to protecting the health and quality of life of the user, in particular in a context of pollution. atmospheric or microbial pandemic / epidemic.
• the generation of a forced air flow F by the device 1 also offers the advantage of compensating for a loss of air pressure that the air filtration device 29 could generate.
• the air filtration device 29 comprises at least one air filter 30, which has a useful area of contact with the air which is between 150 cm 2 and 400 cm 2 , and preferably between 180 cm 2 and 300 cm 2 .
• “Useful area of contact with the air” is here advantageously understood to mean the total area of a filtering surface (or upstream filtering surface) of the air filter 30 which is in contact with the incoming air to be filtered.
• Such preferential ranges of useful surface in contact with the air make it possible to define a high exchange surface with the air, and therefore to obtain effective filtering, with an a Vogellic pressure drop induced by the air filter. 30 relatively limited, and maintaining sufficient air flow speeds.
• the air filter 30 is a pleated filter, which allows the air filter 30 to have a high useful surface area of contact with the air, preferably included in the above-mentioned surface ranges, while having a controlled overall size.
• the useful surface of contact with the air of the air filter 30 therefore advantageously corresponds to the total area of the unfolded filtering surface of the air filter 30.
• the choice of the useful section and the volume of the air filter 30 is capable of strongly influencing the total aeraulic pressure drops of the device 1, the operating point of the fan 11 and therefore the overall efficiency of the device 1.
• the volume of the air filter 30 has an influence on the sizing of the front central element 3, and therefore on the compactness of the main body 2 of the device 1.
• the air filter 30 preferably has a free inlet face 30A and an opposite free outlet face 30B, which each extend along a plane, and which each define a useful section (useful passage section of air through the air filter 30) advantageously between 900 mm 2 and 4900 mm 2 , preferably between 1600 mm 2 and 3600 mm 2 , and more preferably between 2025 mm 2 and 3025 mm 2 .
• said air filter 30 has a zero thickness, that is to say a distance which separates said free inlet face 30A from said free outlet face 30B, which is between 5 mm and 20 mm, preferably between 8 mm and 20 mm, and more preferably between 10 mm and 15 mm.
• the air filter 30 can advantageously have the shape of a square-based prism, the free inlet face 30A and the free outlet face 30B of which are square in shape with a side c of between 30 mm and 70 mm, and whose thickness e is between 5 mm and 20 mm.
• the free inlet face 30A and the free outlet face 30B are square in shape with a side c comprised between 40 mm and 60 mm, and the thickness e is comprised between 8 mm and 20 mm. More preferably still, the free inlet face 30A and the free outlet face 30B are square in shape with a side c comprised between 45 mm and 55 mm, and the thickness e is comprised between 10 mm and 15 mm. This being so, although a prism shape with a square base is preferred, it is still possible for the air filter 30 to have another shape, for example a cylinder with a circular base.
• the apparatus 1 could comprise, instead of the air filtration device 29, an air treatment device designed and configured to treat air other than by filtration, and for example by ionization or else using ultraviolet (UV) light, in order to purify it.
• the air treatment device could be designed and configured to treat air not in order to purify it, that is to say to rid it of undesirable substances, but to improve other characteristics thereof. for the comfort and/or preservation of the user's respiratory health.
• the air treatment device could be designed and configured to humidify or dry air, to cool or heat air, or even to scent the air, upstream of its delivery to the user.
• the apparatus could, on the contrary, be devoid of any air filtration device, as described above.
• the device would therefore not be provided for filtering, treating, the ambient air before it is delivered to the user in the form of a forced air flow.
• the device would nevertheless have the advantage of allowing the user a reduced respiratory effort, by facilitating the circulation of air in the bronchi and the lungs of the user.
• the use of the device according to this second variant would contribute to protecting, or even improving, the state of health and the quality of life of the user, in particular when the latter is suffering from a dysfunction of the respiratory system (poor functioning of the lungs, weakness of the respiratory muscles, etc.).
• the fan 11 of the device 1 constitutes a motorized fan unit comprising at least one electric motor and at least one propeller or fan wheel connected to the electric motor.
• the device 1 also comprises a device for controlling the fan 11, to enable the user to control its switching on, the speed of rotation, etc.
• the fan 11 is a centrifugal fan, or radial turbine fan, and even more preferably an action centrifugal fan (or "squirrel cage", that is to say a centrifugal fan whose the blades are inclined forward in the direction of rotation).
• a centrifugal fan or "squirrel cage", that is to say a centrifugal fan whose the blades are inclined forward in the direction of rotation).
• Such a fan 11 indeed has the advantage of allowing the generation of an air flow F of high flow rate and pressure, with excellent efficiency, and for a limited size.
• the fan 11 then comprises a single air intake inlet, which simplifies the aeraulic design of the device 1 in particular.
• said action centrifugal fan 1 comprises a blade wheel 11 A, which comprises between 30 and 45 blades, and preferably 37 blades.
• Said blade wheel 11A has an outer diameter preferably between 20 mm and 40 mm, and preferably equal to 30.4 mm.
• Said bladed wheel 11A has an axial thickness preferably between 2 mm and 6 mm, and preferably equal to 3.3 mm.
• the fan 11 comprises a volute 11B inside which the bladed wheel 11A is rotatably mounted, the volute 11B having at least one volute nose.
• the fan 11 is designed to be powered at an electrical voltage of 5 V, at a nominal power of 1.85 W, an average speed of rotation of 9,500 revolutions per minute, for a maximum flow rate of 0.079 m 3 /min and a maximum static pressure of 260 Pa.
• Such characteristics in terms of design and dimensioning of the fan 11 are particularly advantageous in the case in particular where the apparatus 1 constitutes an apparatus 1 for filtering air with assisted ventilation, such as considered in the foregoing.
• the operating point of the fan 11 typically corresponds to a flow rate between 0.04 m 3 / min and 0.06 m 3 / min.
• the average speed of the air flow F at the outlet of the fan 11 is advantageously greater than 10 m/s, which advantageously makes it possible to obtain a speed of the air flow F at the outlet of the distribution element of air 15 which is between 0.5 m/s and 2.5 m/s.
• the holding branches 4 are substantially rigid, that is to say substantially devoid of their own flexibility, and in particular substantially not elastically deformable manually by the user, in normal use of the device 1 .
• the holding branches 4 of the main body 2 of the device 1 can form (or belong to) one and the same holding piece, typically in the general shape of a "U", each of said branches of maintenance 4 forming a branch of the "U" shape, at least one of which is connected, fixed, directly to the front central element 3 (removably or permanently).
• the holding branches 4 would therefore, in this case, be permanently connected to one another, for example at the level of a belly of said "U" shape.
• the other of the branches of the "U" shape would then be indirectly connected to the front central element 3 via the branch which is connected directly to the front central element 3.
• the belly of the "U” shape would therefore advantageously be arranged facing the neck or the back of the user's head, while the branches of the "U” shape would laterally follow the neck or the user's head.
• the holding branches 4 of the main body 2 are separate from each other, and are connected to said central front element 3 on either side. other of the latter. The holding branches 4 are therefore separated from each other, each constituting a separate holding piece from the other.
• Said holding branches 4 are advantageously shaped and configured so that, in use of the device 1, said holding branches 4 advantageously extend from one end of said holding branches 4 at which the latter are connected to the central front element 3 as far as a free end 31 opposite each of the holding branches 4, laterally along the user's neck and at least partially opposite the user's neck (figures 1 and 2), or laterally along the head and at least partially facing the back of the head.
• the holding branches 4 of the main body 2 of the device 1 are separate from each other, each of said holding branches 4 being advantageously connected to the element central front 3 of the main body 2, preferably on either side of the latter, by means of articulation 32 to allow the main body 2 to move between a folded configuration of the holding branches 4 and a deployed configuration of the holding branches 4 (and vice versa).
• the main body 2 is therefore articulated so that the user can move it, preferably manually, from said folded configuration (FIG. 6) to said deployed configuration (FIGS. 1 to 5 and 7 to 12).
• the deployed configuration of the holding branches 4 of the main body 2 advantageously corresponds to a configuration of use of the device 1, in which the latter is able to be put in place, worn and put into operation by the user, and wherein the main body 2 occupies a given bulk volume.
• the main body 2 then has the at least partially annular general shape, as already introduced above.
• the folded configuration of the holding branches 4 of the main body 2 advantageously corresponds to a storage configuration, in which the main body 2 occupies a smaller bulk volume. In said folded configuration, the main body 2 then does not necessarily have an at least partially annular general shape.
• the device 1 is thus particularly easy to put in place around the neck or the head with a view to its use, then to remove, and its size can be significantly reduced. for storage after use.
• the device 1 can thus advantageously constitute a "nomadic" device, which can easily accompany its user in his daily life and his travels, and be stored easily in a limited space, such as for example in a pocket, a handbag or a little backpack.
• the articulation means 32 also constitute means for permanently fixing the holding branches 4 to the front central element 2. Once connected to the front central element 3 via the hinge means 32, the holding branches 4 cannot thus be separated, detached, by the user in normal use of the device 1. This contributes in particular to the simplicity of use of the device 1 .
• the articulation means could, on the contrary, constitute reversible, removable fastening means of the holding branches 4 to the front central element 3. In this way, the user could separate and reassemble the holding arms 4 and the central front element 3, for example to replace the holding arms 4 with other compatible holding arms 4.
• said articulation means 32 each comprise a hinge, so as to articulate pivotally, according to a simple and intuitive kinematics for the user, the holding branches 4 with respect to the front central element 3.
• suitable kinematics of articulation means 32 ball joint, helical connection, pivot-sliding connection, linear connection, annular linear connection, etc.
• the apparatus 1 further comprises adjustment means 33 for adjusting a characteristic dimension of the holding branches 4 (whether or not they are distinct, separate, from each other), and more particularly a length of the latter, and thus adjust the device 1 to the user.
• adjustment means 33 By acting on these adjustment means 33, the user can thus adjust the dimensions of the holding arms 4 of the main body 2 of the device 1 according to his own morphology.
• said adjustment means 33 can thus be advantageously designed and configured to allow adjustment of the length of the holding branches 4 in order to adjust the dimensions of the main body 2 of the device 1 to the dimensions of the user's neck or head, taking into account, where appropriate, the presence of clothing or a clothing accessory at the level of the user's neck or around the head.
• the main body 2 of the device 1 fits perfectly around the neck or the head of the user, providing the latter with great comfort of use of the device 1, while advantageously allowing a maintenance of the air distribution outlet 16 of the air distribution element 15 in position in the preferential range of average distance relative to the user's respiratory tract mentioned above.
• said adjustment means 33 comprise a telescopic slide, which advantageously makes it possible to shorten or lengthen the length of the holding branches 4 at will, in a simple, reliable and robust manner.
• the device 1 can include a temporary locking system 34 to reversibly lock the main body 2 attached around the user's neck or head.
• Such a temporary locking system 34 advantageously makes it possible in particular to limit the risk of separation of the main body 2 and the body of the user, for example in the event of a strong jolt imparted to the main body 2 during a sudden movement of the user.
• the temporary locking system 34 can advantageously be arranged at the level of the free end 31 of each of the holding branches 4, opposite the end of said holding branches 4 at the level of which the latter are connected to the central front element 4 by the hinge means 32.
• the temporary locking system 34 can comprise magnetic or ferromagnetic elements (including for example one or more permanent magnets), arranged at the free end 31 of each of the holding branches 4 and which cooperate to temporarily hold the holding branches 4 in magnetic contact, after the main body 2 has been positioned on the user, and the length of the one and/or the other of the retaining arms 4 has been adjusted using the adjustment means 33 considered above, if necessary.
• the temporary locking system 34 advantageously makes it possible to join the free ends 31 of the holding branches 4, and to contribute to giving and thus maintaining a closed annular shape of the main body 2 of the device 1, which will thus adapt perfectly to the morphology around the neck or the head of the user.
• the main body 2 of the device 1 has a median sagittal plane P3 which substantially, generally, forms a plane of symmetry of said main body 2, which is intended to be arranged merged with the median sagittal plane Ps of the user (FIGS. 1 and 2).
• the main body 2 of the device 1 is shaped and configured so as to define two portions (typically a right portion and a left portion) of the main body 2 which have respective geometric envelopes which are substantially identical in mirror with respect to the median sagittal plane P3 of the main body 2.
• the holding branches 4 are thus advantageously identical with respect to each other by mirror symmetry with respect to the median sagittal plane P3 (of symmetry) of the main body 2 of the device 1.
• the body main 2 is designed and configured so that, when the user is equipped with the device 1, the main body 2 is arranged around the neck (FIGS. 1 and 2) or the head of the user with his sagittal plane median P3 merged with the median sagittal plane Ps of the user.
• the symmetrical portions of the main body 2 have substantially identical respective masses.
• the air distribution element 15 has a median sagittal plane P4 which forms a plane of symmetry of the air distribution element 15, which coincides with the median sagittal plane P3 of the main body 2.
• the air distribution element 15 is arranged around the neck (FIGS. 1 and 2) or the user's head with its median sagittal plane P4 coinciding with the sagittal plane User's median ps. This contributes in particular, on the one hand, to the aesthetic character of the device 1 and, on the other hand, to the comfort and stability of the wearing of the device 1 by the user, in particular when the user is traveling.
• the device 1 comprises an altitude adjustment device 35 (or booster) to adjust an altitude of positioning of the front central element 3 relative to the user.
• the altitude adjustment device 35 is therefore designed and configured to allow the user, once the latter has positioned the main body 2 of the device 1 around his neck or his head, to adjust the height positioning of the front central element 3 relative to the body of the user.
• the altitude adjustment device 35 is therefore advantageously designed and configured to move at least the central front element 3 of the main body 2 between a relative high position and a relative low position, and vice versa.
• an altitude adjustment device 35 advantageously allows the user to adjust the positioning of the main body 2 relative to his body, and in particular to ensure positioning and support as much as possible. stable as possible of the air distribution outlet 16, as close as possible (but still at a distance) from the respiratory tract. Furthermore, by maneuvering the altitude adjustment device 35, the user can lower the front central element 3 to facilitate his communication with those around him by freeing up more free space in front of his face, in the event that the body Principal 2 is intended to be worn around the neck.
• the altitude adjustment device 35 comprises a retractable foot 36 which is connected to the front central element 3 of the main body 2 and which is provided with a support surface 37 on a part of the body of the user, and preferably on the chest of the latter in the case where the main body 2 is intended to be worn around the neck.
• the retractable leg 36 is designed to be completely retractable inside the front central element 3, foldable by pivoting in the direction of the latter (as in the embodiment illustrated in the figures), and/or to be telescopic.
• the manipulation of the retractable foot 36 thus advantageously allows the front central element 3 to describe a stroke going from the user's chest (low relative position ) towards the nose of the user (high relative position), and vice versa, which makes it possible to best adapt the device 1 to the morphology of the user by adjusting the position of the distribution element of air 15, and therefore from the air distribution outlet 16, as close as possible to the respiratory tract of the latter, or on the contrary by allowing him to move the air distribution outlet 16 away according to his needs, during the use of the device 1, advantageously in the preferential range of average distance mentioned above.
• the energy required for the electrical operation of the device 1, and in particular of the fan 11, is supplied by an electric storage battery, which is preferably arranged inside the front central element 3.
• the electrical operation of the device 1 can be controlled by the user via at least one on/off button, which is preferably carried by the front central element 3.
• the device 1 can comprise a sensor of fine particles and/or volatile organic compounds, which detects the presence of fine particles and/or volatile organic compounds in the surrounding ambient air and measures their concentration.
• the sensor is then housed in the front central element 3.
• such a sensor is designed and configured to transmit to a computer or to a remote smart telephone, for example via a wireless data link, information relating to the presence and concentration of such fine particles and/or volatile organic compounds, so as to inform the user about the quality of the surrounding air.
• the invention finds its application in the design and manufacture of assisted ventilation devices, such as in particular assisted ventilation air filtration devices, and more particularly assisted ventilation devices individually portable on it by a user.
• assisted ventilation devices such as in particular assisted ventilation air filtration devices, and more particularly assisted ventilation devices individually portable on it by a user.

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• Health & Medical Sciences (AREA)
• Pulmonology (AREA)
• General Health & Medical Sciences (AREA)
• Business, Economics & Management (AREA)
• Emergency Management (AREA)
• Respiratory Apparatuses And Protective Means (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=81325188

Family Applications (1)

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• 2021
  • 2021-12-06 FR FR2113021A patent/FR3129845B1/fr active Active
• 2022
  • 2022-11-28 CN CN202280080475.9A patent/CN118354821A/zh active Pending
  • 2022-11-28 WO PCT/FR2022/052185 patent/WO2023105138A1/fr not_active Ceased
  • 2022-11-28 EP EP22840790.4A patent/EP4444433A1/de active Pending

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