Ventilation system, room, confined space and building equipped with such a system, and associated method

Abstract

- The invention relates to a ventilation system for a room or a confined space, comprising: - a blowing device for blowing a gas into the room or the confined space, and - a suction device for drawing out the gas contained in the room or the confined space, the suction device comprising suction mouths that are distributed one beneath another along a vertical direction, which comprise a top suction mouth, a bottom suction mouth and intermediate suction mouths situated between the top and bottom mouths, the distance between the top and bottom mouths being greater than half the height beneath the ceiling of the room or the confined space. - Ventilation of closed volumes, treatment of the air, delamination, air-conditioning and heating of rooms.

Description

DOMAIN OF INVENTION

[0001] The present invention relates to the general technical field of ventilation systems, particularly inside buildings, and more particularly systems enabling controlled ventilation of a confined space or room, in order for example to destratify, homogenize, renew, filter or treat the air that said space or room contains.

[0002] The present invention relates more particularly to a ventilation system for a room or confined space equipped with a ceiling, said ventilation system comprising at least: a blowing device designed to blow a gas into said room or confined space, and a suction device designed to suction the gas contained in said room or confined space.

[0003] The present invention further relates to a method for ventilating a room or confined space equipped with a ceiling, the method comprising at least: a step of blowing a gas into said room or confined space, and a step of suctioning the gas contained in said room or confined space. PREVIOUS TECHNIQUE

[0004] It is already known that ventilation systems are used, particularly in commercial and public buildings, such as hospitals. These systems can have distinct or complementary functions, such as air conditioning or heating in a commercial building, or air renewal in an operating room of a hospital or clinic. Operating room ventilation systems are known to be specifically designed to supply air through a supply vent in the ceiling and extract air from the room through exhaust vents integrated into vertical walls near the floor.

[0005] This particular configuration allows air to be blown in own » directly onto the operating table, while carrying most of the air pollutants close to the ground, where they are then removed by suction.

[0006] This known configuration, dedicated to particularly demanding cases, is however not optimal.

[0007] Indeed, this known configuration does not allow for a complete and rapid renewal of the air contained in the room, and leaves many " dead zonesThis refers to areas of the room where the air is not renewed, or only minimally so, particularly areas away from supply and exhaust vents, as well as areas protected from air movement, such as those located under furniture (operating table, lighting fixtures, etc.). Furthermore, these existing ventilation systems do not homogenize the air in the room; the air remains distributed in several layers, according to a temperature and / or humidity gradient, for example, in a substantial portion of the room. This type of ventilation system also presents the risk of contaminated material (saliva droplets from healthcare staff, airborne particles, contaminants, dust, etc.) falling onto the body of a patient on an operating table in the room.Furthermore, conventional ventilation systems are often unpleasant for people located directly below or near the air distribution system supplying the room. Finally, the manufacture and installation of these conventional ventilation systems face significant and often costly constraints, as the integration of ventilation components into the ceiling and walls generally needs to be planned from the initial construction of the building housing the room to be ventilated.

[0008] Mobile air treatment systems, designed to be installed in the room to be treated, are also available. While these portable systems may offer an acceptable level of performance locally for cooling the air or treating it against viruses, they are not suitable for treating the entire volume of air in the room, leaving untreated "dead" volumes.

[0009] Document SE-541317 C2 describes a ventilated room with an intake element and an exhaust element. Air is drawn out of the ventilated room through the exhaust element using a fan and a filter element. Both the intake and exhaust elements are made of flat elements with a continuous perforation pattern. DESCRIPTION OF THE INVENTION

[0010] The objects assigned to the present invention therefore aim to remedy the various disadvantages listed above and to propose a new ventilation system whose design allows the air, and more generally the gas, contained in a room or confined space to be renewed quickly and optimally, that is to say in the most complete way possible by limiting or even eliminating dead zones, while being of simple design, robust and easily adaptable to different air treatment systems, and more generally gas treatment systems.

[0011] Another object of the invention is to propose a new ventilation system that is easy and quick to manufacture.

[0012] Another object of the invention aims to propose a new ventilation system which makes it easy to extract, in whole or almost in part, the gas contained in a room or confined space in order to renew it, and in particular to treat it and then reintroduce it, in whole or in part, into said room or expel it outside.

[0013] Another object of the invention aims to propose a new ventilation system whose design allows for an excellent compromise between its overall cost and its ability to treat all or almost all of the volume of air, and more generally of gas, contained in a confined space.

[0014] Another object of the invention is to propose a new, particularly compact ventilation system.

[0015] Another object of the invention aims to propose a new ventilation system which can be installed in a room or confined space to ventilate it in a particularly simple, easy and economical way.

[0016] Another object of the invention aims to propose a new ventilation system which is particularly simple to integrate into a room or confined space to be ventilated from both a practical and aesthetic point of view.

[0017] Another object of the invention aims to propose a new ventilation system whose design allows it to adapt universally to different types of rooms or confined spaces, or more generally to different types of fixed closed volumes (dwellings, hospitals, supermarkets, tanks, cold storage rooms for example) or mobile volumes (trains or airplanes for example), to be ventilated.

[0018] Another object of the invention aims to propose a new ventilation system which has a modular character, and whose principle makes it possible to treat the air or more generally the gas of a room or confined space without limit of dimensions, or more generally closed volumes without limit of dimensions.

[0019] Another object of the invention aims to propose a new universal ventilation system that can fulfill various functions related to ventilation, and in particular the extraction, distribution, destratification, homogenization, of air or gas from a room in order to manage the heating, cooling, deodorization, depollution or disinfection of the air or gas in question.

[0020] Another object of the invention aims to provide a new ventilated room or a new confined space capable of renewing the air, and more generally the gas, that it contains, in a rapid and optimal way, that is to say in the most complete way possible leaving very few, or even no, dead zones.

[0021] Another object of the invention is to propose a new, inexpensive, simple and easy-to-implement ventilation process, while offering optimized air renewal efficiency.

[0022] The objects assigned to the invention are reached using a ventilation system according to claim 1.

[0023] The objects assigned to the invention are also reached using a room according to claim 15.

[0024] Also described is a building or mobile structure comprising at least one ventilated room or confined space as mentioned above. SUMMARY DESCRIPTION OF THE DRAWINGS

[0025] Other objects and advantages of the invention will become apparent and stand out in more detail upon reading the following description, with reference to the accompanying drawings, given purely by way of illustration and not limitation, of the invention as defined by the claims, among which: there figure 1 illustrates, in a schematic side view, a first embodiment of a ventilation system according to the invention, installed in a room. figure 2 illustrates, according to a schematic top view, the ventilation system of the figure 1 . there figure 3 illustrates, in a schematic side view, a second embodiment of a ventilation system according to the invention, installed in a room. figure 4 illustrates, in a schematic top view, a detail of the embodiment of a blowing device according to a third embodiment of the invention. figure 5illustrates, in a schematic top view, a detail of the embodiment of a blowing device according to a fourth embodiment of the invention. figure 6 illustrates, according to a schematic top view, a fifth embodiment of a ventilation system according to the invention, installed in a large room, for example a supermarket, to ensure air treatment, and implementing a plurality of modules (“ doublets ") of suction / blowing distributed evenly throughout the room in question so that each can draw in and blow out air in a 360° pattern. figure 7 illustrates, in a schematic top view, a sixth embodiment of a ventilation system according to the invention, installed in an operating room. figure 8 illustrates, according to a schematic side view, the ventilation system of the figure 7 . there figure 9illustrates, according to a schematic top view, a seventh embodiment of a ventilation system according to the invention, installed in a room. Figure 10 illustrates, according to a schematic top view, an eighth embodiment of a ventilation system according to the invention, installed in a room. figure 11 This illustrates, in a schematic side view, a ninth embodiment of a ventilation system according to the invention, installed in a theater with tiered seating. figure 12 illustrates, according to a schematic top view, the performance hall of the figure 11 . there figure 13 illustrates, according to schematic side, cross-section, and longitudinal section views, a train car equipped with a ventilation device according to the invention. BEST WAY TO IMPLEMENT THE INVENTION

[0026] As illustrated in the figures, the invention relates, according to a first aspect, to a ventilation system 1 for a room 2 or a confined space equipped with a ceiling 3. Obviously, said room 2 or said confined space advantageously comprises several side walls 4, preferably vertical, said side walls 4 being, for example, four in number. Said room 2 or said confined space further advantageously comprises a floor 5. Said side walls 4, said floor 5, and said ceiling 3 preferentially delimit said room 2 or said confined space, and more precisely, the interior space thereof. Preferably, the room 2 or said confined space further comprises corners 6 separating said side walls 4. Said room 2 or said confined space may consist of any enclosed or closed volume within a building or a stationary or mobile structure, such as a vehicle (train or airplane, for example).The said room 2 can be intended to accommodate individuals (staff, customers, etc.) and / or animals, as well as installations such as computer equipment (servers in particular), or it can be intended for the storage of products (foodstuffs, raw materials, processed products, etc.). The said confined space can consist of any enclosed or closed volume, within a mobile or fixed structure, which volume is generally not intended to accommodate personnel for extended periods, such as a tank, a storage area, a reservoir, a warehouse (the definition of a confined space may in some cases overlap with that of a room), a vault, a ship's hold, a silo, a tunnel, etc. The said room 2 or the said confined space may also have a variable ceiling height, as in the case of a theater or amphitheater-style cinema. Figures 11 And 12). Said ventilation system 1 is therefore preferably intended to equip said room 2 or said confined space to ventilate the latter. More generally, said room 2 or said confined space may be formed by any enclosed volume requiring ventilation, said enclosed volume being able to be partially or completely enclosed.

[0027] Thus, the invention further relates, according to a second aspect, to a ventilated room or confined space 2 comprising at least one ceiling 3, said room 2 or said confined space being equipped with a ventilation system 1 as described above and below.

[0028] Also described, according to a third aspect, is a building or a mobile structure (for example a vehicle, such as a road or rail vehicle, a ship or an aircraft) comprising at least one ventilated room or confined space 2 as described above and below.

[0029] According to the invention, the ventilation system 1 comprises at least one blower device 7 designed to blow gas into said room 2 or confined space, i.e., the blower device 7 forms a gas distribution device. The ventilation system 1 also comprises a suction device 8 designed to suction the gas contained in said room 2 or confined space, i.e., the suction device 8 forms a gas extraction device. Thus, the ventilation system 1 advantageously forms a gas extraction and distribution system.

[0030] The gas is, in particular, air, that is, a mixture comprising mainly nitrogen and oxygen (as well as carbon dioxide, argon, etc., in smaller quantities), but it may also include, or be composed of, vapor, for example, water vapor. The gas may, however, consist of other components, and for example, the gas may consist mainly of oxygen, or mainly of one or more carbon oxides, or any gaseous compound, particularly at ambient temperature (between 10 and 30°C, for example). The gas is advantageously predominantly present in a free space of said room 2 or said confined space, that is, the space delimited by said side walls 4, the floor 5, and the ceiling 3, and not by any other walls or partitions. Arrows that do not refer to any number in the figures generally represent a localized airflow.

[0031] The ventilation system 1 is advantageously designed to renew the gas, and in particular the air, within a room 2 or a confined space, that is to say, on the one hand, to extract the gas already present within said room 2 or said confined space from the latter (or at least from the free space of the latter), by means of the suction device 8, and on the other hand to introduce gas (“ nine " passed through the ventilation system 1, by means of the blowing device 7. Advantageously, said gas " nine » has been treated by said ventilation system 1 (for example by a treatment device included in said system 1) and / or comes from outside room 2 or the confined space, so that it is made up of outside gas and / or treated gas, it being understood that in all cases said new gas passes through said ventilation system 1.

[0032] The aforementioned blowing and suction devices 7 and 8 are preferably designed to operate continuously, with the gas passing successively through the blowing device 7, room 2 or the confined space, the suction device 8, and then possibly outside room 2 (or the confined space) and / or back to the blowing device 7, as will be seen below. The blowing device 7 is therefore preferably designed to blow gas into room 2 or the confined space, while the suction device 8 is advantageously designed to extract gas from room 2 or the confined space.

[0033] According to the invention, the suction device 8 comprises a plurality of suction outlets 9, 10, 11. Preferably, the blowing device 7 comprises a plurality of blowing outlets 12, 13, 14. The term " mouth" must be taken here in its most extensive sense, so that it can designate indifferently all kinds of openings, orifices, pores or others, whatever their dimensions and configuration. Each of the said mouths 9, 10, 11, 12, 13, 14 can thus be formed for example by one or more orifice(s) or opening(s), in the form for example of perforations made through a sheet, or by the through pores of a wall made of rigid, flexible or flaccid porous material, or even by the interstices existing between the threads or fibers of a woven or non-woven material, textile or metallic, for example a textile fabric, a metallic fabric or a combination of textile and metallic fabrics.

[0034] The aforementioned suction inlets 9, 10, 11 are distributed, for example in layers, one below the other, in a substantially vertical direction (represented by the Z axis on the figures 1 to 3 And 11In a particular embodiment, the suction inlets 9, 10, 11 are positioned, preferably in layers one below the other, in a substantially vertical direction, and form, for example, one or more substantially vertical rows of suction inlets 9, 10, 11, i.e., without significant offset in the horizontal plane of the suction inlets 9, 10, 11 relative to each other, this offset not exceeding, for example, a few centimeters, preferably not exceeding 10 cm, more preferably not exceeding 5 cm, and even more preferably not exceeding 3 cm. These suction inlets 9, 10, 11 are thus advantageously designed and distributed to extract gas from room 2 or the confined space.

[0035] According to the invention, said suction openings 9, 10, 11 comprise at least one upper suction opening 9 and one lower suction opening 10, as well as intermediate suction openings 11 located between said upper suction openings 9 and lower suction openings 10. The intermediate suction openings 12 are, according to a particular embodiment, distributed in a substantially regular manner, in particular along the vertical direction and / or in the horizontal plane.It is of course possible that some suction inlets 9, 10, 11 are at the same height (i.e., in the same horizontal plane), but preferably there must be suction inlets 9, 10, 11 distributed vertically one above the other, with a gap between them in the horizontal plane preferably less than 10 cm, more preferably less than 5 cm, more preferably still less than 3 cm, and more preferably still practically zero. Examples of horizontal planes are shown in the diagrams. Figures 1 , 2 And 12 by the X and Y axes (which are therefore advantageously substantially perpendicular to the Z axis).

[0036] According to the invention, the distance between said high suction inlets 9 and low suction inlets 10 is greater than at least half the ceiling height 3 of said room 2 or said confined space. Said ceiling height is measured locally, that is to say, at the location where said suction device 8 is situated. Advantageously, the distance between said high suction inlets 9 and low suction inlets 10 is greater than 80%, preferably greater than 90%, of the ceiling height 3 of said room 2 or said confined space, and more preferably is nearly equal to or equal to the ceiling height 3 of said room 2 or said confined space. The ceiling height 3 is preferably the vertical distance between the floor 5 and the ceiling 3 of said room 2 or said confined space.Thus, the ventilation system 1 of the invention advantageously allows for the ventilation, that is to say, the renewal, of all the gas layers present within the room 2 or the confined space. For example, the air present within a room tends to stratify into different layers of different temperatures and densities, with the lowest density and warmest layers at the top (for example at 30°C) near the ceiling 3, and the highest density and coldest layers below (for example at 17°C) near the floor 5, with a temperature gradient between these two extreme layers.

[0037] Preferably, the density and / or size of several of the suction inlets 9, 10, 11 closest to the ceiling 3 and / or the floor 5 is greater than that of the other suction inlets 9, 10, 11. In other words, the suction device 8 is preferably designed to have a greater suction capacity near the floor 5 and / or near the ceiling 3. Such a configuration, illustrated in particular in the figure 3 This allows for faster and more complete renewal of the extreme gas layers that tend to stagnate and are usually more difficult, or even impossible, to ventilate and / or renew. Indeed, the central layers (in terms of altitude, height) of room 2 or the confined space usually tend to be renewed more quickly because they have an average density / temperature. Thus, the gas " nine» (i.e., the outside and / or treated gas) introduced into the room or confined space from the ventilation system 1 will usually position itself in the middle of the gas layers, at mid-height of room 2 or the confined space, before this layer median"extends and occupies the entire room 2 or confined space. This is more easily achieved with the ventilation system 1 of the invention, which acts on all layers, and this is improved by increasing the density and / or size of supply vents 12, 13, 14 and / or suction vents 9, 10, 11 near the ceiling 3 and / or the floor 5. According to a particular embodiment, in combination with the above or independently, the density and / or size of (several of) the supply vents 12, 13, 14 (among) those closest to the ceiling 3 and / or the floor 5 is greater than that of the other supply vents 12, 13, 14. Thus, the supply device 7 can be designed to have a greater supply capacity near the floor 5 and / or near the ceiling 3.

[0038] According to a particular embodiment, said suction device 8 has a substantially elongated shape and is designed to be placed, in operation, substantially vertically (represented by the Z-axis in the figures, in particular the figures 1 to 3 And 11 ). According to this particular embodiment illustrated in the figures, said suction device 8 thus advantageously forms a suction column intended to be positioned substantially vertically and to occupy room 2 or the confined space over a substantial portion of its height, and preferably said suction column has the same size (to within 5% for example) as the ceiling height 3 of said room 2 or said confined space.

[0039] According to a particular embodiment, and as mentioned previously, the blowing device 7 comprises a plurality of blowing outlets 12, 13, 14. Said blowing outlets 12, 13, 14 advantageously comprise at least one high blowing outlet 12 and one low blowing outlet 13, as well as intermediate blowing outlets 14 located between said high blowing outlets 12 and low blowing outlets 13. The intermediate blowing outlets 14 are, according to a particular embodiment, distributed in a substantially regular manner, in particular along the vertical direction and / or in the horizontal plane.It is obviously possible that some supply outlets 12, 13, 14 are at the same height (i.e. in the same horizontal plane), but there are preferably necessarily supply outlets 12, 13, 14 distributed vertically one above the other, with a gap between them in the horizontal plane preferably less than 10 cm, more preferably less than 5 cm, more preferably still less than 3 cm, more preferably still substantially zero.

[0040] Advantageously, the distance between said high supply air diffusers 12 and low supply air diffusers 13 is greater than at least half the ceiling height 3 of said room 2 or said confined space. Said ceiling height is measured locally, that is to say, at the location where said supply air diffuser 7 is situated. Advantageously, the distance between said high supply air diffusers 12 and low supply air diffusers 13 is greater than 80%, preferably greater than 90%, of the ceiling height 3 of said room 2 or said confined space, and more preferably is almost equal to or equal to the ceiling height 3 of said room 2 or said confined space.

[0041] Preferably, the blowing device 7 has a substantially elongated shape and is designed to be placed, in operation, substantially vertically. According to this particular embodiment, the blowing device 7 thus advantageously forms a blowing column intended to be positioned substantially vertically and to occupy room 2 or the confined space over a substantial portion of its height, and preferably the blowing column has the same size (within 5% for example) as the ceiling height 3 of said room 2 or said confined space.

[0042] The suction device 8 comprises a wall forming a suction duct (preferably that described below), with orifices distributed along the height of said wall and passing through it to form said suction inlets 9, 10, 11. Said wall is at least partly curved in the plane perpendicular to the longitudinal extension direction of the suction duct, the curved part of said wall advantageously carrying said suction inlets 9, 10, 11. For example, said wall includes a perforated sheet metal plate to form said inlets, or a textile or fibrous panel (preferably woven or possibly non-woven) whose interstices between the threads or fibers form said inlets, or a panel made of a porous material, whose pores are through-pores to form said inlets.The wall may, for example, be in the form of a cylindrical column, preferably with a circular (or elliptical, or oval) base, such as a tube, arranged vertically, and whose lateral wall may, for example, be perforated with a distribution of orifices covering the height and periphery of the column, in an angular sector of 360° so as to draw the gas radially at 360°, or less (for example, 90° or 180°) depending on the configuration of the installation. According to a particular embodiment of the invention, the suction device 8 may thus comprise or be formed by a vertical perforated suction tube (for example, made of metal or polymer), the perforations forming the suction inlets 9, 10, 11.

[0043] In the case where room 2 or the confined space has a variable ceiling height (see Figures 11 And 12), which is the case, for example, in certain theaters or cinemas (which, when equipped with the ventilation device 1, constitute rooms 2 conforming to the invention), the supply device 7 is preferably located in a first zone 2' of the room 2 or confined space where the ceiling height is greatest, while the extraction device 8 is located away from, and preferably opposite, the supply device 7, in a second zone 2" of the room 2 or confined space where the ceiling height is lowest. Thanks to this technical measure, it is possible to obtain particularly effective air renewal, homogenization, and destratification within the room 2 or confined space. It is, of course, entirely possible, as illustrated in the figure 12that the ventilation system 1 comprises several blowing devices 7 and several suction devices 8 as above, as illustrated in the figure 12, and that one or more (for example two) of said blowing devices 7 are arranged at the level of said first zone 2', for example on either side of a screen or a stage 25, while one or more (for example two) of said suction devices 8 are arranged at the level of said second zone 2", for example at the very top of a performance or cinema hall, and that one or more other (for example one) of said suction devices 8 are arranged at the level of said first zone 2' away from the blowing devices 7 arranged in said first zone 2', for example behind the screen or a stage 25 of a performance or cinema hall.The said suction device(s) 8 in the said first zone 2' are then advantageously disposed towards, preferably against, a first lateral wall 4' of the room 2 or of the confined space, while the said suction device(s) 8 in the said second zone 2' the suction device 8 is disposed opposite the blowing device 7, towards, preferably against, a second lateral wall 4" opposite the said first lateral wall 4'.According to a particular embodiment which may be substantially close or similar to that described above, the blowing device 7 is arranged towards, preferably against, a first side wall 4' of the room 2 or of the confined space corresponding to the greatest ceiling height, while the suction device 8 is arranged opposite the blowing device 7, towards, preferably against, a second side wall 4" opposite said first side wall 4' corresponding to the smallest ceiling height.

[0044] According to the invention, several variants of which are illustrated in the figures, the blowing device 7 and the suction device 8 are designed to be placed at a distance from each other, and in particular substantially parallel to each other and opposite each other, in opposite areas of said room 2 or said confined space, for example at two opposite corners 6 of the latter, as illustrated in the figures 2 And 7 , or at the level of two opposite walls 4 of said room 2 or said confined space, as illustrated in the Figure 10 .

[0045] According to a particular variant, the suction device 8 comprises at least one suction duct extending substantially in a longitudinal direction intended to be placed substantially vertically, said suction duct being provided with said suction inlets 9, 10, 11. The suction device 8 can thus comprise or be formed by said suction duct, which is preferably positioned in said room 2 or said confined space, for example at a distance from said side walls 4, or on the contrary against one or more (typically two) of said side walls 4. Said suction duct is preferably substantially elongated (along said longitudinal direction in particular).The said suction pipe has, for example, a length between 1 m and 7 m, preferably between 1.4 m and 6 m, more preferably between 1.8 m and 5 m, more preferably still between 2 m and 4 m.

[0046] The suction duct may, for example, be in the form of a hollow suction column (or hollow pipe) along which suction inlets 9, 10, 11 are provided (possibly drilled), the hollow column advantageously extending longitudinally in the direction of the longitudinal extension of the suction duct. According to a particular embodiment of the invention, and notwithstanding the suction inlets 9, 10, 11, the hollow column has a substantially cylindrical shape, preferably with a circular, oval, or elliptical base, or, according to another embodiment of the invention, has a portion of a cylinder cut lengthwise (i.e., in a direction parallel to the direction of the longitudinal extension of the suction duct), the cylinder preferably having a circular, oval, or elliptical base.

[0047] According to another particular variant, preferably combined with the preceding one but which may also be implemented independently, the blowing device 7 comprises at least one blowing duct extending substantially in a longitudinal direction intended to be positioned substantially vertically, said blowing duct being provided with said blowing outlets 12, 13, 14. The blowing device 7 may thus comprise or be formed by said blowing duct (as illustrated in figures 7-8for example) which is preferably positioned in said room 2 or said confined space, for example at a distance from said side walls 4, or conversely against one or more (typically two) of said side walls 4. According to a particular embodiment of the invention, the blowing device 7 may thus comprise or be formed by a vertical perforated blowing tube (for example, made of metal or polymer), said perforations forming said blowing outlets 12, 13, 14. Said blowing duct is preferably substantially elongated (in particular along said longitudinal extension direction). Said blowing duct has, for example, a length of between 1 m and 7 m, preferably between 1.4 m and 6 m, more preferably between 1.8 m and 5 m, and more preferably still between 2 m and 4 m.

[0048] The supply duct may, for example, be in the form of a hollow column (or hollow pipe) along which supply outlets 12, 13, 14 are provided (possibly drilled), the hollow column advantageously extending longitudinally in the direction of the longitudinal extension of the supply duct. According to a particular embodiment of the invention, and notwithstanding the supply outlets 12, 13, 14, the hollow column has a substantially cylindrical shape, preferably with a circular, oval, or elliptical base, or, according to another embodiment of the invention, has a portion of a cylinder cut lengthwise (i.e., in a direction parallel to the direction of the longitudinal extension of the supply duct), the cylinder preferably having a circular, oval, or elliptical base.

[0049] The supply duct 7 has a substantially curved cross-section, or at least a partially curved cross-section, for example, a substantially circular, elliptical, or oval cross-section (i.e., a closed shape), or a cross-section with a portion in the form of an arc, an ellipse, or an oval (i.e., an open shape), or a cross-section with at least a portion in the form of an arc, an ellipse, or an oval (i.e., an open or closed shape), as illustrated in the figures. The cross-section (of the supply duct) is preferably defined by the intersection of, on the one hand, a plane substantially perpendicular to the longitudinal extension direction of the supply duct and, on the other hand, the supply duct itself. This plane is advantageously substantially horizontal.

[0050] Thus, according to an advantageous embodiment, the supply duct and / or the suction duct each have at least one respective convexity. This respective convexity is preferably directed outwards, i.e., towards a space in room 2 or the confined space into which the supply duct is designed to supply gas, and / or from which the suction duct is designed to draw gas. The supply duct and / or the suction duct each have at least one respective concavity.The said respective concavity is preferably intended to be directed towards the interior (or to form the interior) of the supply duct and / or the suction duct, that is to say a space (of the supply duct and / or the suction duct) intended, for the supply duct, to receive gas before it is blown into said room 2 or said confined space, for the suction duct, to receive gas from said room 2 or said confined space.

[0051] The supply vents 12, 13, 14 are distributed along the supply duct 7 in such a way as to give a radial distribution (relative to the longitudinal extension direction of the supply duct) to the gas emitted from the latter, that is to say, to orient the gas radially at the outlet of the latter, advantageously to diffuse said gas within said room 2 or said confined space. In other words, the supply vents 12, 13, 14 are advantageously distributed along a surface curved outwards (of the duct, that is to say, curved from the inside of the duct towards room 2 or confined space out of the duct) and elongated vertically to blow gas into room 2 or the confined space in divergent, non-parallel flow directions, at the level of said supply vents 12, 13, 14.It is advantageously the curved or partially curved nature of the supply duct 7 that will allow this radial distribution (or radial diffusion, or radial supply), which allows the gas to be blown very efficiently within said room 2 or said confined space without occupying a significant volume and / or surface within said room 2 or said confined space, which obviously limits the bulk and facilitates the installation of the ventilation system 1. Several of said supply outlets 12, 13, 14 are preferably distributed on the curved part of said cross-section, along said curved part, that is to say at different places of the latter in the plane of the cross-section (therefore a plane advantageously perpendicular to the direction of longitudinal extension), in order to achieve said radial supply.Depending on the configuration of room 2 or the confined space to be ventilated and the positioning of the ventilation system 1 within said room 2 or said confined space to be ventilated, said radial distribution can be carried out in a circular fashion over 360° (in the case of a mesh like that of the . figure 6 for example), or according to a smaller angular sector, for example of the order of 90° (quarter circle) when the supply vents 12 are arranged in a corner of the room ( cf. figure 9 ) or on the order of 180° (semicircle - cf . Figure 10 ) when the supply vents 12 are arranged against a wall at a distance from the corners (for example, in the case of a wagon - cf. figure 13). In other words, according to this variant, the supply duct 7 advantageously has a curve, and the supply outlets 12, 13, 14 are distributed along this curve in groups at respective heights, so as to supply gas in several radial directions with respect to said curve. Such a configuration makes it possible to supply gas to all areas of room 2 or the confined space. Preferably, said radial distribution is defined according to the longitudinal extension direction of said supply duct. This radial distribution makes it possible, in particular, to destratify and homogenize the gas forming the atmosphere of room 2 or the confined space more efficiently and quickly, by supplying gas to all or almost all areas of room 2 or the confined space, which makes it possible to avoid the creation of " dead zones "in which the gas stagnates and is not renewed by the ventilation system 1.

[0052] Preferably, the suction duct has a cross-section in which several suction inlets 9, 10, 11 are located, each suction inlet 9, 10, 11 being intersected by a respective virtual line inscribed in the plane of the cross-section and intersecting the longitudinal extension direction of the suction duct. These virtual lines advantageously intersect (particularly at the longitudinal extension direction). Preferably, these virtual lines diverge outwards from the suction duct.

[0053] Advantageously, the blowing device 7 comprises a wall forming said blowing duct, with orifices distributed over the height of said wall and passing through it to form said blowing outlets 12, 13, 14. Said wall is at least partly curved in the plane perpendicular to the longitudinal extension direction of the blowing duct, the curved part of said wall advantageously carrying said blowing outlets 12, 13, 14. For example, said wall includes a perforated sheet metal plate to form said orifices, or a textile or fibrous panel (preferably woven or possibly non-woven) whose interstices between the threads or fibers form said orifices, or a panel made of a porous material, whose pores are through-pores to form said orifices.

[0054] The wall may, for example, be in the form of a cylindrical column, preferably with a circular (or elliptical, or oval) base, such as a tube, which is arranged vertically and whose lateral wall may, for example, be perforated with a distribution of orifices covering the height and periphery of the column, according to an angular sector adapted to the positioning of the supply device 7 within the room or confined space. Advantageously, the orifices forming the supply outlets 12, 13, 14 are arranged according to an angular sector that covers, at most, the room 2 or the confined space to be ventilated, depending on the positioning of the supply device 7. Thus, in the case of a mesh such as that of the figure 6For example, the orifices can be distributed in a circular pattern over 360°. The orifices can be distributed according to a smaller angular sector, for example of the order of 90° (quarter circle) when the supply vents 12 are arranged in a corner of the room (cf. figure 9 ), or approximately 180° (semicircle) when the supply outlets 12 are placed against a wall away from the corners ( cf. figure 9 and in the case of a wagon, for example, cf figure 13 ).

[0055] In the case where the blowing device 7 consists of a vertical column, it is preferable that the surface through which the air is injected faces the area of ​​the room to be supplied and that the airflow distribution be homogeneous across the blowing surface. It is also preferable that the homogeneity of the injected airflow be achieved with minimal mixing with the room air. This leads to the use of a wall made of canvas, fabric, or a porous material, or even a perforated sheet metal panel with the smallest possible openings. This allows the gas to be blown into the confined space to be ventilated through very small openings, distributed homogeneously and continuously across the entire surface of the vertical column facing the space to be ventilated, so as to effectively sweep the space with a gas flow, preferably along its entire height.

[0056] Preferably, said suction conduit 8 has a substantially curved cross-section or at least a partially curved cross-section, for example substantially a circular, elliptical or oval cross-section (i.e. closed figure), or a cross-section having a portion in the form of an arc of a circle, a portion in the form of an ellipse, or a portion in the form of an oval (i.e. open figure), or a cross-section having at least a portion in the form of an arc of a circle, a portion in the form of an ellipse, or a portion in the form of an oval (i.e. open or closed figure) as illustrated in figures 2 And 7 In particular, the said cross-section (of the suction pipe) is preferably defined by the intersection of, on the one hand, a plane substantially perpendicular to the direction of longitudinal extension of the suction pipe and, on the other hand, the suction pipe. Said plane is advantageously substantially horizontal.

[0057] The aforementioned suction inlets 9, 10, 11 are distributed along the suction duct so as to allow radial suction (relative to the longitudinal extension direction of the suction duct) of the gas from room 2 or the confined space. In other words, the suction inlets 9, 10, 11 are advantageously distributed along a surface curved outwards (of the duct, i.e., curved from the inside of the duct towards room 2 or the confined space out of the duct) and elongated vertically to draw the gas from room 2 or the confined space along convergent, non-parallel flow directions at the level of the aforementioned suction inlets 9, 10, 11.It is advantageously the curved or at least partially curved nature of the suction duct that will allow this radial suction, which makes it possible to very efficiently suction the gas from said room 2 or said confined space without occupying a significant volume and / or surface within said room 2 or said confined space, which obviously limits the bulk and facilitates the installation of the ventilation system 1. The suction outlets 9, 10, 11 are preferably distributed on the curved part of said cross-section, along said curved part, that is to say at different places of the latter in the plane of the cross-section (therefore a plane advantageously perpendicular to the direction of longitudinal extension), in order to achieve said radial suction.Here again, depending on the configuration of room 2 or the confined space to be ventilated and the positioning of the ventilation system 1 within said room 2 or confined space, the radial distribution can be 360° or within a smaller angular sector. In other words, according to this latter variant, the suction duct advantageously has a curve, and the suction outlets 9, 10, 11 are distributed along this curve in groups at respective heights, so as to draw the gas from room 2 or the confined space in several radial directions relative to said curve. The supply duct 7 and suction duct 8 can be similar, as illustrated in the diagrams. figures 2 And 13 in particular, for reasons of simplification and / or limitation of manufacturing costs, or different ones, as illustrated in Figures 9 and 10in particular, due, for example, to the configuration of room 2, the confined space, or the gas flow requirement. The supply duct 7 and / or the suction duct 8 may thus have a respective closed cross-section (see figure), for example, a complete circle, or an open cross-section (see figure), for example, an arc or a semicircle. The duct with an open cross-section is advantageously designed to be placed against at least one of the side walls 4, as illustrated in the figures. Figures 9 and 10for the blowing duct of the blowing device 7. Preferably, said radial suction is defined according to the longitudinal extension direction of said suction duct. Said radial suction makes it possible in particular to destratify and homogenize the gas forming the atmosphere of room 2 or the confined space more efficiently and quickly, by drawing gas from all or almost all areas of room 2 or the confined space, which makes it possible to avoid the creation of " dead zones "in which the gas stagnates and is not renewed by the ventilation system 1.

[0058] Preferably, the suction duct has a cross-section in which several suction inlets 9, 10, 11 are located, each suction inlet 9, 10, 11 being intersected by a respective virtual line inscribed in the plane of the cross-section and intersecting the longitudinal extension direction of the suction duct. These virtual lines advantageously intersect (particularly at the longitudinal extension direction). Preferably, these virtual lines diverge outwards from the suction duct.

[0059] According to an advantageous embodiment, the ventilation system 1 comprises at least one substantially elongated gas distribution device 15, 16 designed to be positioned vertically to delimit a space 17, which is intended to accommodate the blower device 7. The gas distribution device 15, 16 preferably has a plurality of orifices, which are more preferably (but not necessarily) distributed substantially regularly over at least half of its length, and preferably distributed over almost all or all of its length. Advantageously, the gas distribution device 15, 16 is the same size (i.e., the same length, within 5%) as the blower device 7.The distribution device 15 advantageously forms a screen with the aforementioned orifices between the blower 7 and the rest of room 2 or the confined space, so as to better distribute the gas flows from said blower 7 within said room 2 or confined space. This gas distribution device 15, 16 is in particular positioned opposite the blower 7, at a short distance from it (a few centimeters, for example between 1 and 30 cm, more preferably between 2 and 20 cm), and preferably alongside said blower 7.

[0060] For example, the distribution device 15, 16 includes a substantially rigid grid or plate 15 having at least some of said orifices. This grid or plate 15 is in particular positioned opposite the blowing device 7, at a short distance from it (a few centimeters, for example between 1 and 20 cm), and preferably alongside the blowing device 7. Such an embodiment is illustrated in figures 4 And 5 in particular, which are enlarged details of the realization of part of the ventilation system 1 at the level of a corner 6 of room 2 (or of the confined space) in which the blowing device 7 and the distribution device 15, 16 are positioned.

[0061] According to another example, applicable alone or in combination with the preceding one, the distribution device 15, 16 comprises a substantially flexible fabric 16 that is not impermeable to said gas, the fabric 16 having threads and spaces between its threads, the spaces between said threads constituting at least a part of said orifices. Such an embodiment is illustrated in particular in the figure 5 The grid or plate 15 is rigid and therefore advantageously presents its own mechanical strength, while the fabric 16 is flexible and therefore preferably does not present its own mechanical strength.

[0062] According to a particular embodiment, illustrated in particular in figures 4 , 5 , 7 and 8The distribution device 15, 16 is designed to be attached to and / or hung on at least one of the side walls 4 to delimit the space 17. The ventilation device 1 may include connecting joints 22 for connecting, for example by gluing, screwing, or any other means, the distribution device 15, 16 to at least one of the side walls 4. For example, the distribution device 15, 16 is designed to be attached to and / or hung on only one of the side walls 4, as illustrated in the figure 12 , or to two lateral walls 4 advantageously separated by one of said corners 6, as illustrated in figures 4 , 5 And 9 . In the latter case, said blowing device 7 and distribution device 15, 16 are preferably designed to be positioned in the same corner 6 of said room 2 or said confined space.

[0063] The use of a separate distribution device 15, 16, located away from the supply device 7, is purely optional. In particular, it is possible to dispense with such a distribution device when a woven or non-woven textile wall, which itself defines the supply outlets 12, 13, 14, is used as the supply device.

[0064] According to a particular embodiment, said blowing device 7 and / or said suction device 8 is / are each designed to be positioned in a respective corner 6 of said room 2 or said confined space. Said two corners 6 are preferably opposite each other and preferably do not share a common side wall 4.

[0065] It is entirely possible, according to a particular embodiment, for the ventilation system 1 of the invention to comprise several blowing devices 7 and several suction devices 8, as illustrated in figures 6 , 9 , 12 and 13For example, the ventilation system 1 comprises two supply devices 7 and two exhaust devices 8, each designed to be positioned in a respective corner 6 of the room 2 or confined space, the two supply devices 7 being, for example, positioned on one side of the room 2 or confined space while the two exhaust devices 8 are positioned on the other side of the room 2 or confined space. The ventilation system 1 may also comprise a larger number of supply devices 7 and exhaust devices 8, for example, to ventilate a very large room 2. The ventilation system 1 then comprises several pairs, each consisting of one supply device 7 and one exhaust device 8 positioned, for example, vertically, at a certain distance from each other, each pair also being at a certain distance from neighboring pairs, as illustrated in figures 6 And 13 .

[0066] According to a particular embodiment, said distribution device 15, 16 has a cross-section with a concavity delimiting said space 17 and turned towards said blowing device 7. Such a configuration makes it possible to improve the radial distribution of the gas within the room 2 or the confined space, from the blowing device 7.

[0067] For example, the grid or plate 15 is substantially flat, that is to say, it extends in a plane, as illustrated in the figure 4 According to another example, the grid or plate 15 is substantially curved, for example in an arc of a circle, as illustrated in the figure 5 . The grid or plate 15 can thus in the latter case have the same curvature profile as the blowing duct of the blowing device 7. The fabric 16 can be designed to have said concavity when the blowing device 7 is operating, said fabric 16 being inflated by the latter.

[0068] Advantageously, the ventilation system 1 further comprises at least one first gas circulation means 18, designed to circulate gas within the blower 7 to room 2 or the confined space, and a second gas circulation means (here the same as the first means 18) designed to circulate gas from room 2 or the confined space to the suction device 8. In the examples illustrated in the figures, said first and second gas circulation means 18 are combined, but they may alternatively be independent of each other. Each gas circulation means 18 comprises, for example, at least one fan, or any other means of moving the gas. The second gas circulation means is therefore advantageously formed by said first gas circulation means 18.

[0069] The said blowing device 7 is preferably designed to blow " actively "of gas in said room 2 or said confined space, advantageously using the first gas circulation means 18. Said blowing device 7 is therefore advantageously designed to force the sending of gas into said room 2 or said confined space, preferably by means of the first gas circulation means 18. Obviously, it is possible to consider, according to a particular variant, that said first gas circulation means 18 is part of said blowing device 7. Similarly, the suction device 8 is preferably designed to suction " actively"The gas from said room 2 or said confined space, advantageously using the second gas circulation means (which may therefore be the same as, or distinct from, the first gas circulation means 18). Said suction device 8 is thus advantageously designed to force the extraction of gas from said room 2 or said confined space, preferably by means of the second gas circulation means. Obviously, it is possible, according to a particular variant, to consider said second gas circulation means as part of said suction device 8."

[0070] According to a particular embodiment, an example of which is illustrated in the figure 12 , the ventilation system 1 further includes an automatic control unit (not visible to the figure 12or confused with sensor 23) and one or more sensors 23 to be placed in said room 2 or said confined space, for example one or more temperature sensors, sensors for a gaseous compound (such as carbon monoxide CO, hydrogen sulfide H2S, nitrogen, carbon dioxide CO2, etc.) or humidity, said sensor(s) 23 being designed to send information to said control unit, so that the latter automatically regulates a gas flow rate circulated by said gas circulation means 18 within said supply device(s) 7 and / or suction device(s) 8. The ventilation system 1 thus advantageously includes a control loop for a parameter of the gaseous atmosphere of room 2 or the confined space, said control loop comprising at least the automatic control unit and said sensor(s) 23, as illustrated in the figure 12For example, the ventilation system 1 is automatically regulated according to temperature and / or humidity, which allows, for example, energy savings on heating. Such savings are facilitated by the destratification and homogenization of the air in room 2 (or the confined space) advantageously achieved by the ventilation system 1. The sensor(s) 23 are optionally designed to be placed at different heights in room 2 or the confined space (when there is only one sensor 23, it extends, for example, vertically to allow measurements to be taken at different heights). Such a configuration allows, in particular, precise control of the renewal and / or treatment of the different gas layers in room 2 or the confined space.The said sensor(s) 23 may, according to another alternative (or in combination with the above), be placed or intended to be placed at the same height of said room 2 or of the confined space, for example on the floor, and may furthermore (regardless of their height) be placed(s) at different locations in room 2 or of the confined space along the horizontal plane (when there is only one sensor 23, it extends for example horizontally in order to be able to take measurements at different locations in room 2 or of the confined space along the horizontal plane).

[0071] According to one particular embodiment, the sensor(s) 23 are (intended to be) positioned in the suction device 8 (and more specifically in the suction duct). According to another particular embodiment, the sensor(s) 23 are positioned in the ventilation system 1 downstream of the suction device 8, for example in the intermediate duct 19 and / or in one or more of the gas vents 27 (described in more detail below). Thus, the sensor(s) 23 can be positioned within or downstream of the suction device 8. Such a configuration makes it possible to ensure analysis of almost all or even all of the gas flow extracted from room 2 or the confined space, and not only at the level of a sensor placed in room 2 or the confined space independently of the suction device 8 (and in particular outside of the latter or not downstream of the latter).

[0072] Advantageously, the means of circulating gas 18 can operate according to a continuous operating mode regulated from data provided by the sensor(s) installed in the closed volume (room 2 or confined space) to be ventilated. It is also conceivable that the means of circulating gas 18 could operate temporarily, for a controlled period, according to a forced operating mode involving circulation of the gas with a maximum flow rate to renew the air and / or purify the air and / or reduce the content of a gaseous compound (for example carbon monoxide CO, hydrogen sulfide H2S, nitrogen, carbon dioxide CO2, etc.) of the air of room 2 or of the confined space concerned (for example a classroom, a performance hall or a train compartment) for a short period of time (for example during a break, intermission, between classes or recreation, stop at a station, or during a cleaning time).

[0073] Preferably, the ventilation system 1 further comprises an intermediate duct 19 connecting said supply devices 7 and suction devices 8 to each other, such that the gas from room 2 or the confined space is drawn in by said suction device 8 and then returned, at least in part, to said supply device 7 via said intermediate duct 19. In a particular embodiment, said intermediate duct 19 forms, together with said supply devices 7 and suction devices 8, an independent sub-assembly intended to be installed in a building (or a mobile or stationary structure) to equip a room or a ventilated space to be ventilated. In this case, said intermediate duct 19 optionally includes an integrated air handling unit, so as to implement air treatment in situ.Alternatively, said intermediate duct 19 is formed at least in part by an air circuit already installed in the building (or the mobile or stationary structure) of which the room or confined space to be ventilated is a part, said air circuit being, for example, part of a controlled mechanical ventilation (CMV) or air handling system to which said supply 7 and exhaust 8 devices are intended to be connected, in which case an air handling system situ can be implemented.

[0074] According to a particular embodiment, the ventilation system 1 includes, upstream of said blowing device 7, a gas treatment means 20. Optionally, the latter is downstream of the suction device 8, in particular when the ventilation system 1 includes said intermediate pipe 19. The latter is then advantageously connected to the treatment means 20, and / or the latter forms part of said intermediate pipe 19.

[0075] For example, the gas treatment means 20 includes at least one or more of the following elements: a means of depollution, decontamination and / or deodorization of the gas, for example a particle filter, an antiviral filter and / or an antibacterial filter, such as a UV filter, or a carbon filter, a means of regulating the physical parameters of the gas, for example a means of regulating the humidity and / or a means of regulating the temperature of the gas, such as a means of heating and / or cooling the gas, or a dehumidifier, and / or a means of homogenizing the gas, for example a mixer.

[0076] According to an alternative feasible alone or in combination with the above, the supply device 7 and the suction device 8 are designed to respectively collect and discharge gas outside of said room 2 or confined space (and preferably outside of the ventilation system 1), for example, air from outside (from a particular building or vehicle). The outside is preferably located outside of room 2 or the confined space and outside of the ventilation system 1. The ventilation system 1 then advantageously includes one or more gas inlets 26 for collecting gas from outside to the supply device 11, and one or more gas outlets 27 for discharging gas from the suction device 8 to the outside. Said gas treatment means 20 can be designed to treat gas originating from outside of said room 2 or confined space.The said intermediate pipe 19 can thus possibly be connected to the said or at least one of the said gas inlet(s) 26 (as illustrated in the . figure 12 , bottom right) and / or to said or at least one of said gas evacuation(s) 27. Thus, the gas from the blowing device 7 may come entirely from the gas sucked up by the suction device 8, or it may come entirely from outside said room 2 or said confined space and not from the suction device 8 which then discharges all the gas outside room 2 or the confined space, or it may come partly from the suction device 8 and partly from outside said room 2 or said confined space without first passing through said suction device 8.

[0077] According to one alternative of the invention, alone or in combination with the preceding and following ones, the suction device 8 is designed to be disposed away from the walls 4 of the room 2 or of the confined space, for example more than one meter from each wall 4. It can then advantageously extend from the floor 5 to the ceiling 3 without contact with any of the walls 4. In a particular mode of the invention, the suction device 8 is placed in the center of the room 2 or of the confined space.

[0078] The invention also relates, according to a fourth aspect, to a method for ventilating a room 2 or a confined space equipped with a ceiling 3, this method preferably being designed to be implemented using the ventilation system 1 mentioned above. Preferably, the preceding description concerning the ventilation system 1 therefore also applies to the ventilation method, and vice versa.

[0079] According to the invention, the method comprises at least: a step of blowing a gas into said room 2 or said confined space, and a step of suctioning the gas contained in said room 2 or said confined space, the suction step being carried out via a plurality of suction mouths 9, 10, 11 of a suction device 8 (preferably the one mentioned above), the suction mouths 9, 10, 11 being distributed one below the other in a substantially vertical direction, said suction mouths 9, 10, 11 comprising at least one high suction mouth 9 and one low suction mouth 10, as well as intermediate suction mouths 11 situated between said high suction mouths 9 and low suction mouths 10, the distance between said high suction mouths 9 and low suction mouths 10 being greater than at least half the ceiling height 3 of said room 2 or said confined space.

[0080] Obviously, the said blowing step is preferably carried out using said blowing device 7, and the said suction step is advantageously carried out using said suction device 8.

[0081] The ventilation process advantageously includes, before (and upstream of) said blowing step, a gas treatment step, preferably using the gas treatment means 20, the gas treatment step preferably taking place after (and downstream of) the suction step.

[0082] The supply stage is carried out via a plurality of supply outlets 12, 13, 14 of a supply device 7 (preferably the one mentioned above). The supply outlets 12, 13, 14 preferably comprise at least one high supply outlet 12 and one low supply outlet 13, as well as intermediate supply outlets 14 located between said high supply outlets 12 and low supply outlets 13, the distance between said high supply outlets 12 and low supply outlets 13 being greater than at least half the ceiling height 3 of said room 2 or said confined space.

[0083] The suction device 8 comprises at least one suction duct extending substantially in a longitudinal direction intended to be placed substantially vertically, said suction duct being provided with said suction outlets 9, 10, 11. The blowing device 7 comprises at least one blowing duct extending substantially in a longitudinal direction intended to be placed substantially vertically, said blowing duct being provided with said blowing outlets 12, 13, 14. Said suction duct 8 and / or said blowing duct 7 has a cross-section (respective) that is substantially curved or at least partly curved.The said suction outlets 9, 10, 11 are distributed on the said suction duct so as to allow radial suction of the gas from room 2 or the confined space and / or the said supply outlets 12, 13, 14 are distributed on the said supply duct so as to give a radial distribution to the gas emitted from the latter (within room 2 or the confined space).

[0084] The ventilation system 1 of the invention allows for a faster and more complete renewal of the gas contained in a room 2 or a confined space, which can be particularly useful in the context of a surgical operation for example, in order to reduce the risks of contamination, or in a more general context, including a classroom, a living room, an office, an open-plan office, a meeting room, a room in a commercial premises (shop), a cinema or performance hall (theatre), a tank, a silo, a hold, a vat, a train car, or even an aircraft fuselage (or any other suitable closed volume).

[0085] The ventilation system 1 of the invention is therefore particularly intended for the problem of ventilation of room 2 or confined space, which encompasses health safety issues related to contamination by microorganisms (pandemic, contamination in hospital, etc.), pollution (fine particles, etc.), the physical safety of property and living beings, the general well-being of people (air conditioning, heating, etc.), and energy optimization. POSSIBILITY OF INDUSTRIAL APPLICATION

[0086] The invention finds its industrial application in the design, manufacture and implementation of ventilation systems.

Claims

1. A ventilation system (1) for a room (2) or a confined space, said ventilation system (1) comprising at least: - a blowing device (7) for blowing a gas into said room (2) or said confined space, and - a suction device (8) for drawing out the gas contained in said room (2) or said confined space, the blowing device (7) and the suction device (8) being placed remote from each other, the suction device (8) comprising at least one suction pipe extending substantially in a longitudinal extension direction placed substantially vertically, said suction device having a cross-section that is at least partly curved and being provided with a plurality of suction mouths (9, 10, 11) distributed one below the other in a substantially vertical direction, the blowing device (7) comprising at least one blowing pipe extending substantially in a longitudinal extension direction placed substantially vertically, said blowing device having a cross-section that is at least partly curved and being provided with a plurality of blowing mouths (12, 13, 14) distributed vertically one above the other, said suction mouths (9, 10, 11) being distributed over said suction pipe in such a way as to provide a radial suction of the gas from the room (2) or the confined space and / or in that said blowing mouths (12, 13, 14) are distributed over said blowing pipe in such a way as to provide the gas emitted therefrom with a radial distribution.

2. The ventilation system (1) according to the preceding claim, characterized in that it further comprises an intermediate pipe (19) connecting said blowing (7) and suction (8) devices to each other, in such a way that the gas in the room (2) or the confined space is drawn out by said suction device (8) then sent back at least in part to said blowing device (7) via said intermediate pipe (19).

3. The ventilation system (1) according to any one of the preceding claims, characterized in that the blowing device (7) and the suction device (8) are placed substantially parallel to each other and opposite to each other, in opposite areas of said room (2) or said confined space.

4. The ventilation system (1) according to any one of the preceding claims, characterized in that said radial suction is made over an angular sector of 360° or less, for example 90° or 180°, and in that said radial distribution of the gas emitted from said blowing pipe (7) is made over 360° or over a smaller angular sector, for example of the order of 90° or 180°.

5. The ventilation system (1) according to any one of the preceding claims, characterized in that it comprises, upstream from said blowing device (7) and / or downstream from the suction device (8), a gas treatment means (20) that comprises for example a gas cooling means.

6. The ventilation system (1) according to the preceding claim, characterized in that said intermediate pipe (19) is connected to the gas treatment means (20) and / or the latter forms a part of said intermediate pipe (19).

7. The ventilation system (1) according to any one of the preceding claims, characterized in that said suction pipe is formed by a wall with holes distributed over the height of said wall and passing through the latter to form said suction mouths (9, 10, 11), said wall including a sheet metal plate perforated to form said holes, or a textile or fibrous panel, the interstices between the threads or fibres of which form said holes, or a panel made of a porous material, the pores of which are pass-through to form said holes.

8. The ventilation system (1) according to any one of the preceding claims, characterized in that said suction pipe is in the form of a cylindrical column with a perforated side wall with a distribution of holes covering the height and the periphery of the column, over an angular sector of 360° in order to draw out the gas radially over 360°, or less, for example 90° or 180°, said holes forming said suction mouths (9, 10, 11).

9. The ventilation system (1) according to any one of the preceding claims, characterized in that said blowing pipe is formed by a wall with holes distributed over the height of said wall and passing through the latter to form said blowing mouths (12, 13, 14), said wall including a sheet metal plate perforated to form said holes, or a textile or fibrous panel, the interstices between the threads or fibres of which form said holes, or a panel made of a porous material, the pores of which are pass-through to form said holes.

10. The ventilation system (1) according to any one of the preceding claims, characterized in that it further comprises at least a first gas circulation means (18), designed to circulate gas within the blowing device (7) up to the room (2) or the confined space, and a second gas circulation means designed to circulate gas from the room (2) or the confined space up to the suction device (8).

11. The ventilation system (1) according to the preceding claim, characterized in that said second gas circulation means is formed by said first gas circulation means (18), which preferably comprises at least a fan.

12. The ventilation system (1)according to claim 10 or 11, characterized in that it further comprises an automatic control unit and at least one sensor (23) to be placed in said room (2) or said confined space, e.g. one or several temperature sensors, for a gaseous compound or humidity, said at least one sensor (23) being designed to send information to said control unit, in such a way that the latter automatically adjusts a gas flow circulated by at least one of said first and second gas circulation means (18) within said blowing device (7) and / or within said suction device (8).

13. The ventilation system (1) according to any one of the preceding claims, characterized in that said room or said confined space having a ceiling (3), said suction mouths (9, 10, 11) comprise at least one upper suction mouth (9) and one lower suction mouth (10), as well as intermediate suction mouths (11) located between said upper (9) and lower (10) suction mouths, the distance between said upper (9) and lower (10) suction mouths being greater than at least half the height beneath the ceiling (3) of said room (2) or said confined space, the distance between said upper (9) and lower (10) suction mouths being preferably greater than 80%, preferably greater than 90%, of the height beneath the ceiling (3) of said room (2) or said confined space, and more preferentially is almost-equal or equal to the height beneath the ceiling (3) of said room (2) or said confined space.

14. The ventilation system (1) according to the preceding claim, characterized in that said blowing mouths (12, 13, 14) comprise at least one upper blowing mouth (12) and one lower blowing mouth (13), as well as intermediate blowing mouths (14) located between said upper (12) and lower (13) blowing mouths, the distance between the upper (12) and lower (13) blowing mouths being greater than at least half the height beneath the ceiling (3) of said room (2) or said confined space.

15. A room (2) with side walls (4), characterized in that it is fitted with a ventilation system (1) according to any one of the preceding claims, said suction pipe and said blowing pipe being positioned in said room (2), said suction pipe being preferably positioned away from said side walls (4), while said blowing pipe is preferably positioned away from said side walls (4).

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