JP6936227B2 - Weatherproof fan grill - Google Patents

Description

The present invention relates to the field of grilles de ventilation.

Ventilation grills allow ventilation of the equipment by drawing or blowing air to protect the equipment from adverse weather, danger of invasion by animals and / or projectiles, and overpressure or depression waves. Designed to.

In particular, but not limited to, buildings of facilities subject to high safety requirements, such as production sites in the chemical or petrochemical industry, or nuclear production sites, have numerous potential external attacks, And in particular must be protected from the following risks:
・ Weather (rain, ice, frost, wind, hail or hail, strong wind ...),
• Projectiles or animals (birds, especially) into the ventilation ducts,
A pressure wave, such as a sudden overpressure caused by a gust of an external explosion, or even a cyclone caused by a tornado / wind or something similar.

If the exterior walls of a building, subject to appropriate size, form an effective defense against current attacks, then window-like openings made in these walls, more specifically ventilation ducts. The opening that closes the end of the is directly exposed to the above attacks and requires a dedicated size.

In fact, non-limitingly:
-Fluid entry, typically liquid rain or solid hail or hail, can cause a range of damage, for example circuit corrosion.
-By partially or completely blocking the openings, ice can practically reduce the efficiency of the ventilation system, especially due to load loss.
-Excessive pressure waves can cause damage to internal circuits and ventilation units, as well as to all equipment contained within the building.
-Tornado cyclones can cause effects similar to overpressure waves.

In both later cases, the movement of related fluids, air or other gases can carry projectiles that are prone to serious damage.

The primary function of the ventilation system is to ensure the thermal regulation of the building as a normal operation. Secondly, the system must carry out the renewal of air in the building by this circulation of air in a set of distribution circuits. These two functions ensure the proper operation of the equipment, in particular, thus contributing to safety, especially with respect to the nuclear production site, followed by less human comfort, or even its integrity (intactly intact). To be).

Equipment designed to contribute to parrying the external attacks described above shall not undermine the quality of the main functions of the system.

Many types of ventilation grills have already been proposed, but none are completely satisfactory.

To deal with rain, animal invasion and ice problems, the ventilation system may be placed in a fixed location or evenly distributed, with rain in the space inside the building to be protected. It may be sized and oriented so that it does not pass through. If possible, vents are configured to keep birds out of the inner space. The outer dimensions of the device are generally defined to ensure the required airflow, even in the presence of partial blockage of the device by ice.

However, the ventilation system does not provide effective protection against high velocity projectiles and therefore considerable kinetic energy.

Therefore, it has sometimes been proposed to replace the vents with stiffer rods.

This solution provides more effective protection for projectiles with strong kinetic energy. Adopting an appropriate arrangement of rods further makes it possible to protect against the risk of animal access and freezing.

It is also possible to orient the rod so as to limit the ingress of rain.

However, due to their shape, the rods proposed to date disrupt the flow, create considerable load loss, and reduce the air flow as normal operation.

The following attempts in one solution are also mentioned:
-This solution is expensive and cannot solve the problem of external explosions, but in this embodiment a shock absorber protection is added in front of the air inflow grill of the ventilation system to protect it from tornadoes.

• Embedding a prime mover (d'obturation) for the rapid interruption of the ventilation network, controlled by a differential pressure transmitter. This solution is very expensive and is based on active equipment. Also, resistance of this equipment to PGW (projectiles produced by extreme winds) projectiles and tornadoes is not possible.

In conclusion, to date, none of the solutions have effectively solved all the problems submitted, especially mechanical and without providing effective protection for all projectiles, and external pressure. Does not ensure reliable protection for rapid changes in.

In fact, the devices proposed to date mitigate only slight pressure fluctuations that are likely to result from, for example, an explosion or breeze.

To date, ventilation system designers have therefore had no choice but to increase the amount of equipment and facilities within the area of the boundary to be protected.

As a result, in fact, the type of protective device illustrated in Attached FIG. 1 is often used these days and is formed by a multi-stage complex layer: rain protection grill 10 to avoid all external attacks. External steps that also prevent the invasion of birds, steps formed by steel bars 12 intended to prevent the invasion of projectiles, frost protection steps 14, formed by explosion-proof flaps consisting of fast closing flaps. It has 16 stages and 18 stages of explosion-proof separation wind doors connected to the ventilation duct.

However, such devices are complex to manufacture and have many disadvantages:
・ They are expensive,
-They produce considerable load loss and generally require upsizing of some elements of the ventilation circuit, and-their effectiveness is not always demonstrated, especially with respect to explosion-proof flaps.

German Patent Invention No. DE7534836 describes an example of a weatherproof ventilation grill having a stiff rod and deflecting fins.

In short, there is currently no simple device to effectively deal with all possible attacks.

German Patented Invention No. DE7534836

In this context, an object of the present invention is, in particular, to propose novel ventilation grills such as:
-Easy airflow under normal operating conditions,
-Disperse the accompanying pressure wave front,
-Limit the rise in pressure in the inner space.

The above object is achieved by the present invention through a weatherproof ventilation grill, which is:
-A series of stiff rods that are parallel and not perpendicular to each other as a whole, oriented towards the premier cote of the grill, which is intended to be oriented outward, and the average surface of the grill as a whole. The first front edge (premiere face d'attaque), which is parallel to the plan moyen) and intended to be totally vertical for use, and to converge and be oriented outward as it moves away from the main plane. A rod having two auxiliary surfaces, which defines a path extending in the direction of the second surface of the grill intended to be oriented inward from the intended first surface, between two adjacent rods. barreaux), and-a series of deflectrices fins, each attached to the base of the main surface of each rod, with the fins forming deflectors at the bottom and bottom of the main surface from one rod. The fins are such that the free end of one fin is the average of the grill to the top of the main surface of the underlying rod so that it has a specific height greater than the distance separating it from the top of the main surface from a rod. It is oriented outwards compared to the main plane according to the inclination and height (selon) that is at least on the same line as the projection orthogonale to the plane or even more chevauche. Tilt towards the front side, which is intended to be, fins,
Have.

The operation and advantages of the present invention will become apparent from the following detailed description.

The present invention specifically provides the following technical effect synergies:
-On the one hand, the bar compartments that define the path extending from the outside to the inside, and thus the ends presented inward by the bar, limit the load loss with respect to air draw from the inside to the outside, and at the same time from the outside to the inside. For a portion of the pressure wave incident on the, presents a spreading element suitable for reducing the effect of this wave.
-On the other hand, the overall vertical main plane of the rod forms a deflector / reflector for the incoming wave or other part of the object.
-And also, the sloping fins not only form a barrage, but also act as a potential deflector for some of the waves and incident objects, breaking the incident wave front on it. Cooperate with the main surface to send back in different directions suitable for (a part of the horizontal wave that collides with the main surface is sent back horizontally, and at the same time a part of the horizontal wave that collides with the fin is perpendicular to the fin and part. Spontaneously outward and overall upwards, and if the angle of inclination between the fins and the horizontal plane is adapted, typically less than 45 °, it is partially fed back towards the main plane. And then sent back by the main plane). Potentially at the same time, in the case of overpressure, the deformation forms a suitable << gate >> to close the path between the rods, and the height of the fins is greater than the distance between the two adjacent rods ( The lower end of the fin in this case can lean on the barreau sous-jacent below).

The present invention also relates to a building having at least one grill according to the present invention, as defined above.

Other features, objectives and advantages of the present invention will become apparent from the detailed description below and with respect to the accompanying drawings given as non-limiting examples.
FIG. 1 described above shows a schematic diagram of a system according to the prior art. FIG. 2 shows a partial view of the weatherproof grill according to the present invention in a vertical cross-sectional view. 3 to 8 show a vertical cross section of the cross section of the rod due to the modification of the present invention. 3 to 8 show a vertical cross section of the cross section of the rod due to the modification of the present invention. 3 to 8 show a vertical cross section of the cross section of the rod due to the modification of the present invention. 3 to 8 show a vertical cross section of the cross section of the rod due to the modification of the present invention. 3 to 8 show a vertical cross section of the cross section of the rod due to the modification of the present invention. 3 to 8 show a vertical cross section of the cross section of the rod due to the modification of the present invention. FIG. 9 shows the load loss caused by the grill according to the present invention as a function of air velocity. FIG. 10 shows the residual pressure after grilling according to the present invention as a function of the angle of the auxiliary plane of the rod with respect to the horizontal plane. FIG. 11 shows the load loss caused by the grill according to the present invention as a function of the angle of the auxiliary plane of the rod with respect to the horizontal plane. FIG. 12 shows the residual pressure after grilling according to the invention as a function of the spacing between the bars. FIG. 13 shows the load loss caused by the grill according to the invention as a function of the spacing between the rods. 14 to 16 show a perspective view and a partial cross-sectional view of two opposite sides of the grill according to the present invention, respectively. 14 to 16 show a perspective view and a partial cross-sectional view of two opposite sides of the grill according to the present invention, respectively. 14 to 16 show a perspective view and a partial cross-sectional view of two opposite sides of the grill according to the present invention, respectively. 17 and 18 show two transplant variants of the grill in a non-vertical arrangement. 17 and 18 show two transplant variants of the grill in a non-vertical arrangement.

The weatherproof ventilation grill according to the present invention is formed by a combination of a series of rods 100 and deflection fins 200.

The fins 200 are fixed to the base of each rod 200.

The rod 100 is preferably fixed to the support column 310 of the frame 300. However, as a variant, the rod 100 may be fixed in a viable manner directly to the structure of the building at the level of the framework of the ventilation opening to be protected.

The same applies to the fins 200, which may be fixed to the stanchions 310 of the frame 300. However, as a variant, provisions may be made to secure the fins 200 directly to the structure of the building at the level of the framework of the ventilation opening to be protected.

Preferably, the ventilation grill according to the invention is installed in a vertical position. However, the grill according to the invention is also installed with a certain inclination with respect to the vertical (the average plane M defined by the frame is not vertical), for example within +/- 20 ° with respect to the vertical. May be good.

The weatherproof grill according to the invention will be described below with reference to the vertical or semi-vertical position it occupies in the position of use and also with reference to the horizontal plane H and vertical plane V shown in FIG. ..

The rod 100 is hard, preferably made of metal, and very preferably made of steel.

The rods 100 are parallel to each other and non-vertical. More precisely, the rod 100 is preferably about +/- 10 ° from the horizontal. In other words, each bar 100 is centered on a longitudinal axis that is horizontal for use at approximately 10 °.

The linear division of the bars 100 is constant over their entire length. All bars 100 preferably have the same linear section.

As is apparent in FIG. 2, the bar 100 preferably has a triangular straight line section as a whole.

The rod 100 may be formed by solid objects, or by assembling three sheets or strips of steel welded in pairs in the area of their adjacent ends.

The rod 100 has a first front end 110 and two auxiliary surfaces 120, 130.

The first front end 110 is attached to the upper auxiliary surface 120 in the area of the horizontal end 112, and is similarly attached to the lower auxiliary surface 130 in the area of the horizontal end 114.

The two auxiliary surfaces 120 and 130 are joined together in a common interior and in the area of the horizontal end 116.

The distance separating the ends 116 of the two adjacent rods 100 is labeled d in the attached FIG.

The distance separating the upper end 112 from the rod 100 and the lower end 114 from the adjacent rod 100 is designated as h1 in the attached FIG.

The connection between the two auxiliary surfaces 120, 130 on the opposite side of the main surface 110 is sharpened or rounded to limit the load loss compared to the inwardly oriented lead flow. It defines the inner end 116 of the rod, which gives a maximum radius of curvature less than 5, 5 mm, preferably less than 3 mm.

The first front end 110 is intended to be oriented outward. It is vertical as a whole, and its vertical height (or width) is referred to as h2 in the attached FIG.

The first front end 110 reflects those incident pressure waves it receives to the outside.

Preferably, all first front ends 110 of rods 100 on the same grill are coplanar and vertical.

The two auxiliary planes 120 and 130 converge as they move away from the main plane 110. In this way, the linear division of the rod 100 decreases from the outside to the inside. Between each pair of two adjacent rods 100, the two auxiliary surfaces 120 and 130 define a path 140 that extends from the outside to the inside and, by comparison, converges for airflow moving from the inside to the outside. do. The progress of the division of the path 140 is gradual, that is, there is no sudden change so as not to disrupt the flow and to optimize the load loss.

The first front end 110 is preferably flat, as shown in FIGS. 2, 3 and 6-8.

However, it may be convexly curved as shown in FIG. 4 or concavely curved as shown in FIG.

Preferably, as is apparent in FIG. 3, the straight line division of the rod 100 is an isosceles triangle, the two auxiliary surfaces 120 and 130 having the same width. More precisely, as is clear in FIG. 2, the straight line division of the rod 100 is preferably an equilateral triangle, the two auxiliary surfaces 120 and 130 and the first front end 110 having the same width.

However, as a modification, as is apparent in FIG. 6, the two auxiliary surfaces 120 and 130 may have different widths (the linear section of each rod remains constant over its entire length and all rods Same cross section).

The two auxiliary surfaces 120 and 130 are preferably flat, as shown in FIGS. 2-6.

However, it may be concavely curved as shown in FIG. 7, or may be convexly curved as shown in FIG.

The deflection fins 200 are attached to the base 114 of the main surface 110 of each rod 100, for example by welding.

The fins 200 are relatively hard, preferably made of metal, and very preferably made of steel.

The fins 200 are parallel to each other. The linear division of the fin 200 is constant over its entire length. All fins 200 preferably have the same linear section.

As is apparent in FIG. 2, the fins 200 are preferably formed of flat metal blades of constant width L and thus have a straight, linear cross section in the stationary state.

The fins 200 are tilted outward as compared to the main surface 110. In other words, each fin 200 either moves away from that end of the connecting portion 114 on the related front end 110 described above or towards its free end 210 from the vertical plane of the front end 110 to which it is attached. Move away by moving. The inclination and height of the fins 200 is such that the free end 210 of the fins 200 is at least on the same horizon as the upper end 112 of the main surface 110 of the underlying rod 100. If desired, each fin 200 may span the main surface 110 of the underlying rod 100 according to a horizontal projection.

Therefore, the fins 200 form a deflector and have a unique distance greater than the distance h1 = (d−h2) that separates the lower end 114 of the main surface 110 from the rod 100 and the upper end 112 of the main surface 110 from the lower rod 200 below. Has a height (or width) L of.

The ratio between the vertical height h2 of each main surface 110 and the vertical height h1 = (d−h2) of the spacing defined between the two adjacent rods 100 is preferably 0.5 and 2. In the meantime, preferably about 1 to ± 10%. Due to this configuration, the section of the rod 100 provides the maximum reflective surface against overpressure waves without itself causing adverse load loss.

As pointed out earlier, and as is apparent in FIGS. 14-16, the rod 100 may be secured to the stanchions 310 of the frame 300, which are sized to fit the size of the ventilation system. In FIGS. 14 to 16, the upper cross beam of the frame 300 is designated as 320 and the lower cross beam is designated as 330.

The slopes α of the auxiliary surfaces 120 and 130 with respect to the horizontal plane are preferably less than 40 °, preferably less than 30 °, and very advantageously less than 25 °.

This slope is calculated to facilitate fluid flow as a normal operation during air draw from the inside to the outside for a flow velocity of conventional dimensions of 2.5 m / s to limit load loss. ing.

The distance h1 between the rods 100 is also calculated so that it prevents the entry of projectiles and limits the risk of blockage by frost.

The distance h1 that separates the two adjacent rods 100 is preferably less than or equal to 90 mm.

Very advantageously, the distance h1 separating the two adjacent rods 100 is between 50 mm and 85 mm, and very advantageously between 60 mm and 80 mm.

Also, the height h2 of the main surface 110 of each rod 100 is preferably greater than or equal to 70 mm.

Very advantageously, the height h2 of the main surface 110 of each rod 100 is between 70 mm and 85 mm, and very advantageously between 60 mm and 80 mm.

Due to their orientation (angle β) and their width (L), the fins or vantelles 200 fixed to the base of each rod 100, preferably at their ends, to the frame support 300. , Counters rain intrusion and limits the additional load loss caused by normal operation.

The slope β between each fin 200 and the horizontal plane H is less than 50 °, preferably less than 45 °, and very advantageously less than 30 °.

According to the present invention, the width L of each fin 200 considered between its connecting end and its free end 210 on the rod 100, the slope β between each fin 200 and the horizontal plane, two adjacent. The distance d that separates the inner convergence points 116 between the two auxiliary surfaces 120 and 130 of the rod 100 and the vertical height h2 of each main surface 110 of the rod 100 are (L x sin β)> = (d−h2). ) Respectent.

The thickness of the fins 200 made of steel is sized to be resistant to fluctuations in explosions and tornado waves, typically equal to at least 0.8 mm.

According to the first embodiment of the present invention, at least some, preferably all fins 200 of the fins 200 are connected to the base 114 of the associated rod 100 by a fixed connecting portion.

However, according to a second embodiment of the invention, at least some, preferably all, of the fins 200 may be connected to the base 114 of the associated rod 100 by an articulated joint.

In this latter case, in the region of the connection of the rod 100 with the base 114, the vents or fins 200 may include a return device that forms a spring. The return device allows the vents or fins 200 to fold over the openings in the path 140 to block the path 140 in the event of substantial overpressure, while further enhancing protection against overpressure. , The fins 200 and the rod 100 associated therewith may be adapted to allow for each allowable degree of freedom of rotation. The above spring ensures that the vents or fins 200 return to their initial position once the overpressure is over.

When the free end 210 of the fin 200 is placed at the same horizontal level as the free end 112 of the underlying rod 100, or beyond this free end 112, the height L of the fin 200 is the height L of the two adjacent rods 100. The interval between is greater than h1. Therefore, in the case of excessive pressure, the fin 200 may close the path 140 between the rods 100 while the lower end 210 of the fins 200 is leaning on the lower rod 200 (prenant appui) due to deformation or joint movement. can.

Due to the combination of the above features, the weatherproof grill according to the invention is resistant to many attacks (PGEW or << Projectiles Generated by Extreme Wind >>, tornadoes, external explosions, ice). It covers parry (couvrir) and is adapted to be optimized. It also protects the ventilation system and equipment inside the building.

In particular, the weatherproof grill according to the present invention:
-Effectively stop projectiles projected in the case of tornadoes and projectiles (PGEW) produced by extreme winds.
-Effectively mitigate sudden pressure fluctuations caused by tornadoes and external explosions so as not to damage the ventilation networks (ducts, ventilators, flaps) inside the building.
-Does not cause substantial load loss in the ventilation network in which they are installed (so that it is not necessary to install load recovery fans or change the characteristics of the installed fans).
-It can perform the function of a conventional ventilation grill (rain protection and bird protection) and perform the installation of the grill according to the invention to replace the previous grill.
-Considering the issue of freezing.

To optimize the weathering grill according to the invention, we conducted a series of parametric studies for each of the main properties of the grill, based on the following reference parameters:
-Air velocity as normal operation: 2.5 m / s,
-Inclinations of auxiliary surfaces 120 and 130 with respect to the horizontal plane α: 25 °,
-Geometry of the front end 110 of the triangular cross section of the bar: straight line,
-Distance between two adjacent rods 100 h1: 80 mm.

The parameter << air velocity >> as normal operation is examined based on the above reference grill.

The results obtained for load loss (Pa) as a function of air velocity (m / s) are shown in FIG.

The test of FIG. 9 reveals a sharp rise in load loss as the air velocity increases. However, the load loss of the grill according to the present invention (about 50 Pa for 2.5 m / s for a grill having dimensions of 1000 x 1000 mm) is relatively low. For comparison, the classic rain protection grill shows a load loss of about 30 Pa for 2.5 m / s, and the gust flap shows a load loss of about 200 Pa up to 350 Pa, so it is classic. The combination exhibits at least four times higher load loss than the grill according to the invention.

During the simulation of an external explosion, the results obtained for the residual pressure measured after the grill, i.e. inside the grill, as a function of the angle of incidence α, are shown to optimize the angle of incidence of the triangular cross section. Shown in 10.

These results show that a reference grill that responds to the parameters defined above is effective against an explosion and thus against a tornado, as it divides the wave of the explosion by 10.

The value of the residual pressure of 1000 Pa downstream of the grill is much lower than the conventional value of the behavior of the HVAC equipment (2000 Pa), even when the pressure generated by the fans of the HVAC network is applied (generally 500 Pa).

The influence of the value of the angle α is negligible (less than 1%) in terms of its ability to “break” the explosive wave.

Conversely, as shown in FIG. 11, the value of the angle α plays an important role for the load loss of the grill under normal conditions from 25 °. The smaller the angle, the less the streamline is disturbed.

The spacing h1 between the grill bars 100 has been studied based on FIG. 12, which shows the residual pressure downstream of the grill as a function of the spacing during the simulation of the application of the explosion.

FIG. 12 reveals that under selected simulation conditions, the aeraulique behavior of the grill facing the explosion is uniform from h1 at 60 mm intervals.

FIG. 13 shows the load loss of the grill by reference as a normal operation as a function of the interval h1 between the rods 100.

FIG. 13 shows that the narrower the rods 100 are, the more effective the grill is against an explosion (and thus a tornado), but the greater the load loss of the local grill. In addition, the rods 100 must be spaced less than 80 mm apart to hold down PGW projectiles and projectiles << steel tube-shaped tornadoes with a diameter of 170 mm >>.

However, the distance h1 between the rods must be as large as possible to improve the protection of the grill against the phenomenon of clogging due to freezing.

9 to 13 show the curves corresponding to the average values of the obtained simulation values with solid lines and the dashed lines at the upper and lower ends of these values corresponding to the range of possible values for each figure. ..

In light of the above, the inventors consider that the distance h1 of about 80 mm between the plurality of bars of the grill is as follows:
-Preserving the considerable effectiveness of the grill facing the explosion,
-Suppress tornado and PGVE projectiles,
-Limit the grill's exposure to the phenomenon of frost.

The effectiveness of the geometry of the front end 110 of the triangular cross section of the bar has been studied for the contours shown in FIGS. 3, 4 and 5.

Related simulations performed revealed:
-For the flat front end 110 as shown in FIG. 3: Residual pressure downstream of the 990 Pa grill under the influence of the explosion, against a load loss of 49 Pa as normal operation.
-For the convex front end 110 with a radius of curvature of 44 mm as shown in FIG. 4: Residual pressure downstream of the 984 Pa grill under the influence of an explosion against a load loss of 88 Pa as normal operation, and- For a concave front end 110 with a radius of curvature of 44 mm as shown in FIG. 5: Residual pressure downstream of a 998 Pa grill under the influence of an explosion against a load loss of 42 Pa as normal operation.

The above result shows that the influence of the attack contour 110 of the rod 100, that is, whether this contour is flat, convex or concave, is negligible (influence) with respect to the explosion (and thus the tornado). Is less than 1%).

Therefore, the grill of the present invention may have a rod 100 whose front end 110 accommodates any one of these geometries, flat, convex or concave.

However, the flat geometry of the front end 110 gives very satisfactory results with respect to dams and reflections on waves caused by explosions and tornadoes, such a flat front end 110 has the advantage of ease of manufacture. To the extent, it can be considered preferable due to the triangular outer cross section of the rod. Also, implanting fins or vents 200 is facilitated by the outer shape of such rods.

The geometry of the fins 200 has also been studied.

The rain protection function is one of the most basic functions of the ventilation grill. The optimized design of the rain protection fin 200 prevents rain (even horizontal rain) from getting inside the building and also between the two rods, typically 80 mm. It allows both to some extent and to have sufficient horizontal spacing to avoid substantial load loss.

The structure proposed by the present invention benefits from the vertical plane 110 of the rod 100, which acts to direct the rain downwards against explosions and tornadoes, due to the increase in load loss as normal operation. Reduce the number of rain protection fins by 2.

The simulation also gives the following results:

もちろん、本発明は前述の実施形態に限定されるものではなく、その観念に従う任意の変形例を指示する。

Of course, the present invention is not limited to the above-described embodiment, and any modification according to the idea is indicated.

The weatherproof grill according to the invention may be installed in a new facility, but it may also be installed to replace the existing ventilation grill.

The weatherproof grill according to the present invention may be installed in many facilities, but may be, for example, but not limited to, installed in an electrical energy production facility from a nuclear energy source.

The weatherproof grill according to the invention has been described above with reference to the vertical or semi-vertical position it occupies in the position of use and also with reference to the horizontal plane H and vertical plane V shown in FIG.

The side of the grill called "outside" refers to the position of use, and the outside is the outside of the building, which corresponds to the "first side". The side of the grill called "inside" refers to the position of use, and the inside is the inside of the building, which corresponds to the "second side".

Also, as previously pointed out, under some transplant conditions, according to the architecture of the building, the average surface M of the grill cannot be exactly vertical during the transplant.

In this case, as shown in FIG. 17, the main planes 110 of the rods 100 remain coplanar to each other and are parallel to the average plane M of the frame 300 of the grill, or as shown in FIG. In addition, the main plane 110 of the rod is tilted with respect to the average plane of the frame 300 and remains parallel to each other, but offset so that these planes 110 remain vertical for use. Either being (offset) may be provided. In all cases, the width of the fins 200 is preferably such that the free end 210 of the fins is at least located on the same horizon as the top 114 of the main surface 110 of the underlying rod 100, or even below this line. It is adapted as it is located in.

Claims (22)

It ’s a weatherproof ventilation grill.
-A series of stiff rods that are generally parallel to each other and not perpendicular to the horizontal plane of the grill during use, with each rod facing the first surface of the grill intended to be oriented outwards. Containing the main planes oriented in the direction, the main planes are housed in their respective planes parallel to each other and are intended to be perpendicular to the horizontal plane of the grill during use, with each rod having two. The two adjacent auxiliary surfaces further include adjacent auxiliary surfaces, starting from the main surface and converging in the direction of the second surface of the grill intended to be oriented inward. A series of stiff rods that define a path that diffuses from the first surface of the grill to the second surface of the grill between each adjacent auxiliary surface of the adjacent rods.
-A series of deflection fins, the deflection fins forming a deflector, adjacent to which the lower end of the main surface of one of the series of rigid rods is located below the series of rigid rods. Width greater than the distance to separate from the rods and separate the upper end of the main surface of the one rod of the series of rigid rods from the other adjacent rods located above the series of rigid rods. to have, such as fins lower end of each deflection fins, the top of the projection and at least the same line perpendicular to the mean plane of the grille of the upper end of the major surfaces of the adjacent rod located under the Or, according to an inclination and height that exceeds the projection of the upper end, each deflection fin is attached to the lower end of the main surface of the corresponding rod and the first surface of the grill with respect to the main surface. Includes a series of deflecting fins, including the lower end of the fin tilted towards
grill. The grill according to claim 1, wherein each rod extends along the longitudinal central axis at about 10 ° from the horizontal plane of the grill during use. The grill according to claim 1 or 2, wherein the rod has a triangular cross section. The grill according to any one of claims 1 to 3, wherein the main surface of each rod is flat. The grill according to any one of claims 1 to 4, wherein the auxiliary surface of the rod is flat. The grill according to any one of claims 1 to 5, wherein the rod has a cross section in the shape of an isosceles triangle, preferably in the shape of an equilateral triangle. A vertical height of said major surface of each bar, the location on one of said series of rigid located at the bottom of the bar separating the lower end of the main surface from the adjacent bar and the series of rigid rods The ratio to the distance that separates the upper end of the principal surface from other adjacent rods is on the order of 0.5-2, preferably on the order of about 1-± 10%. The grill according to any one of claims 1 to 6. The vertical height of the main surface of each rod is 70mm or more, the grill according to any one of claims 1 to 7. The vertical height of the main surface of each rod is between 70Mm～85mm, very advantageously is between 60Mm～80mm, grill according to any one of claims 1 to 8. The inclination between the horizontal plane of the grill in use and the auxiliary surface of the rod is less than 40 °, preferably less than 30 °, and very advantageously less than 25 °. The grill according to any one of claims 1 to 9. The distance according to any one of claims 1 to 10, wherein the distance for separating the lower end of the main surface of each rod from the adjacent rod located below the series of hard rods is 90 mm or less. Grilled. The distance that separates the lower end of the main surface of each rod from the underlying adjacent rod of the series of rigid rods is between 50 mm and 85 mm, with great advantage 60 mm to 80 mm. The grill according to any one of claims 1 to 11, which is between. The width L of each deflection fin considered between its connecting end on the rod and its lower end, the slope β between the horizontal plane of the grill in use and each deflection fin, said of the two adjacent rods. The distance d that separates the inner convergence points between the two adjacent auxiliary planes, and the vertical height h2 of each major plane of the rod, are claimed according to the relationship (L x sin β)> = (d−h2). Item 2. The grill according to any one of Items 1 to 12. The grill according to any one of claims 1 to 13, wherein at least some of the deflection fins are connected to related rods by a fixed connecting portion. The grill according to any one of claims 1 to 13, wherein at least some of the deflection fins are connected to related rods by articulated joints. The connection between the two adjacent auxiliary surfaces on the opposite side of the main surface defines a pointed inner end or a rounded inner end of the rod that gives a maximum radius of curvature less than 5 mm, preferably less than 3 mm. , The grill according to any one of claims 1 to 15. The inclination between the horizontal plane of the grill in use and each deflection fin is less than 50 °, preferably less than 45 °, and very advantageously less than 30 °, claims 1 to 1. The grill according to any one of 16. The grill according to any one of claims 1 to 17, wherein the rod and the deflection fin are made of metal, preferably made of steel. The grill according to any one of claims 1 to 18, wherein the thickness of the deflection fin made of steel is equal to at least 0.8 mm. The grill according to any one of claims 1 to 19, wherein the rod is supported by a frame support portion. The grill comprises at least one articulated joint and a spring, the articulated articular portion connecting the lower end of the corresponding rod to the at least one deflecting fin, the spring. The grill according to any one of claims 1 to 20, which is located in the vicinity of the joint type connecting portion. A building having at least one grill according to any one of claims 1 to 21, wherein the grill is a building.
-A series of stiff rods that are generally parallel to each other and not perpendicular to the horizontal plane of the grill during use, with each rod facing the first surface of the grill intended to be oriented outwards. Containing the main planes oriented in the direction, the main planes are housed in their respective planes parallel to each other and are intended to be perpendicular to the horizontal plane of the grill during use, with each rod having two. The two adjacent auxiliary surfaces further include adjacent auxiliary surfaces, starting from the main surface and converging in the direction of the second surface of the grill intended to be oriented inward. A series of stiff rods that define a path that diffuses from the first surface of the grill to the second surface of the grill between each adjacent auxiliary surface of the adjacent rods.
-A series of deflection fins, the deflection fins forming a deflector, adjacent to which the lower end of the main surface of one of the series of rigid rods is located below the series of rigid rods. Width greater than the distance to separate from the rods and separate the upper end of the main surface of the one rod of the series of rigid rods from the other adjacent rods located above the series of rigid rods. to have, such as fins lower end of each deflection fins, the top of the projection and at least the same line perpendicular to the mean plane of the grille of the upper end of the major surfaces of the adjacent rod located under the Or, according to an inclination and height that exceeds the projection of the upper end, each deflection fin is attached to the lower end of the main surface of the corresponding rod and the first surface of the grill with respect to the main surface. Includes a series of deflecting fins, including the lower end of the fin tilted towards
Building.

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