EP2848873B1 - Schutzvorrichtung einer Betriebszone, und entsprechendes Verfahren - Google Patents

Schutzvorrichtung einer Betriebszone, und entsprechendes Verfahren Download PDF

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Publication number
EP2848873B1
EP2848873B1 EP14177330.9A EP14177330A EP2848873B1 EP 2848873 B1 EP2848873 B1 EP 2848873B1 EP 14177330 A EP14177330 A EP 14177330A EP 2848873 B1 EP2848873 B1 EP 2848873B1
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EP
European Patent Office
Prior art keywords
plate
stage
diffusion
openings
called
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EP14177330.9A
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English (en)
French (fr)
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EP2848873A1 (de
Inventor
Georges Arroyo
Philippe Georgeault
Michel Loubat
Laurence Wallian
Johan CARLIER
Anthony Guibert
Dominique Heitz
Philippe Loisel
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Institut National de Recherche en Sciences et Technologies Pour Lenvironnement et lAgriculture IRSTEA
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Institut National de Recherche en Sciences et Technologies Pour Lenvironnement et lAgriculture IRSTEA
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/082—Grilles, registers or guards
    • F24F2013/088—Air-flow straightener
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/16—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by purification, e.g. by filtering; by sterilisation; by ozonisation
    • F24F3/163—Clean air work stations, i.e. selected areas within a space which filtered air is passed

Definitions

  • the present invention generally relates to the protection of a zone of operation.
  • the invention relates more particularly to a device for protecting an operating area, in particular for handling products, and a corresponding handling method.
  • a device according to the preamble of claim 1 is known, for example, from the document US-4-3530781 .
  • blowing / suction means are located near the handling zone to control the flow of air in order to obtain the stability of the air flow with a low speed and a temperature adapted to the comfort of the operators.
  • blowing / suction means close to the operators can be an inconvenience for the user by the physical and / or visual clutter they impose.
  • the operator may also be inconvenienced by the airflow when his face is exposed.
  • the document US3660956 describes an equipment ventilation grid with a vertical airflow outlet.
  • the document US3530781 also describes a ventilation grid of a buried installation.
  • the document FR2353808 describes a ventilation box for roofing of a building. None of the installations described above are intended to allow an operator to stand on one side of the plant and handle products at the plant level by protecting the handling area of the products from external pollution.
  • the object of the invention is to propose a device for protecting a zone of
  • the document EP2522921 discloses a cleaning apparatus having an air outlet direction inclined with respect to the air inlet direction. manipulation, also called operating field, to improve the handling conditions.
  • the subject of the invention is a device for protecting an operating zone, in particular for handling products, according to claim 1.
  • the rectifying stage makes it possible to straighten the fluid which arrives at the input of the plate, in particular when it arrives substantially parallel to the plate, that is to say substantially parallel to the underside of the plate.
  • the orientation stage located above that is to say downstream of the rectifying stage, makes it possible to orient the rectified flow in the desired direction by limiting the losses of charge and the defects of homogeneity. the velocity of the flux at the plateau diffusion surface relative to a configuration in which the flow would not previously be rectified.
  • the diffusion screen allows, thanks to its reduced openings, to form a substantially flat work surface, on which objects can be placed with a reduced risk of falling or jamming in the openings of the tray.
  • Such a combination makes it possible to direct the flow in an oblique direction relative to the normal to the plate to allow an operator to position himself on the opposite side of the flow in order to limit the exposure of his face to the flow, while limiting the losses. charging the flow and providing a substantially flat handling surface, with a reduced risk of falling object in the openings of the tray.
  • the inclined portion of the separation zone extends the parallel portion to the free end or outer edge side of the tray. Such inclination of the portion of the separation zone between the rectifying stage and the orientation stage located on the side of the slice of the plate makes it possible to obtain, in particular on the side where the operator is located, a fluid diffusion with stable aerodynamic characteristics, while maintaining an orientation of the flow in the direction of a gap with respect to the operator.
  • Said high point of the inclined portion is closer to the upper face than the lower face and is located on or near the free end side, also called the outer edge, of the plate at which the operator is positioned.
  • the separation zone between the two rectifying and orienting stages thus comprises a non-planar surface having a high point close to the side, also called the outer slice, of the plate where the operator stands with respect to the lowest point closer to the center. of the plateau.
  • the upper surface of the plate is supplied with air over its entire surface, even on the side of the plate where the operator is located.
  • Such an arrangement of the inclined portion thus preserves the side of the plate where the operator stands, perpendicular to the upper and lower faces of the plate, while ensuring air diffusion over the entire upper surface of the plate itself close to the operator and with a reliable tilt effect at the outer edge due to the entrainment of said diffused flux at the end edge, by the flux diffused at the center of the upper surface of the tray.
  • the inclined portion is rectilinear.
  • the inclined portion is curved, and the center of curvature of the inclined portion is oriented towards the upper face said plateau.
  • the inclined portion it is possible for the inclined portion to extend the parallel portion tangentially.
  • the thickness of the diffusion screen is smaller than that of the orientation stage or the recovery stage.
  • said device comprises a panel, called a working plane, preferably of thickness substantially equal to that of the diffusion plate, which extends the diffusion plate on the side of a slice, called inner slice of the scattering plate, opposed to the slice, said outer slice, at which an operator is able to position himself to manipulate products above the diffusion plate, and said second direction corresponding to the orientation of the openings of the orientation stage is chosen so as to direct the flow of fluid in the upper face of the plate away from the outer edge of the diffusion plate.
  • said high point is located on the or near the upper outer edge of the diffusion plate, defined by the junction of the upper face of the plate and said outer edge.
  • the orientation stage and / or the recovery stage comprises a honeycomb structure, preferably a honeycomb structure, said cells forming the openings of said stage.
  • the cells of the orientation stage are offset with respect to the cells of the recovery stage with which they communicate.
  • a honeycomb structure of the orientation stage and / or the floor of straightening makes it possible to contribute to the laminarization of the fluid flow and to guide the flow by limiting the pressure drops, while forming a rigid support for the diffusion screen.
  • the honeycomb structure could be replaced by another honeycomb structure, or other apertured structures, while having similar guides to guide the flow, such as curved sipes, or tubes bent.
  • the characteristic size of the passage section of each cell for example the diameter of the inscribed circle, is at least three times smaller than its height.
  • said diffusion screen is formed by a woven fabric, preferably made of plastic, such as polyethylene.
  • said device comprises a box having an air inlet and an air outlet opening on the lower face of the diffusion plate, and a fan arranged, preferably inside the box, for circulating a flow of fluid from the inlet to the outlet of said housing.
  • said device comprises means for regulating the speed of the fluid flow, said speed regulating means comprising a speed sensor and a fan control unit according to the speed of flow of the fluid. fluid acquired by the sensor to maintain the speed of the fluid flow at the output of the diffusion plate substantially equal to a set value.
  • said speed sensor comprises a housing which extends through a wall of the box and in which are formed a fluid inlet on the side of the interior of the box and a fluid outlet on the side. from the outside of the box, said housing housing a probe for acquiring the speed of the flow of fluid flowing between the inlet and the output of the housing, and said sensor is designed to generate a pressure drop, vis-à-vis the fluid passing through it, substantially equal to that generated by the diffusion screen.
  • said speed sensor is located between the fan and the air outlet of the box.
  • said device comprises a filter, called prefilter, located upstream of the fan, preferably at the inlet of said box, and / or a filter, located downstream of the fan, preferably between the fan and the speed sensor.
  • said box is located under the plane passing through the lower face of the diffusion plate.
  • the invention also relates to a method of handling products above a plate, called a diffusion plate, characterized in that said diffusion plate is part of a protection device for an operation zone as described herein. above and for which the fluid flow diffused on the upper face is oriented in a direction oblique with respect to the normal to the plate, and in that an operator is positioned on the side of the plate which is opposite to the direction direction of said flow of diffused fluid in the upper face.
  • the invention relates to a device for protecting an operating zone 100, in particular for handling products of different types.
  • Said device comprises a plate 2, called a diffusion plate, having two opposite faces, one said upper face 202, oriented towards the operating zone 100, and the other, said lower face 200.
  • Said diffusion plate 2 comprises a first stage, called a righting stage 20, a second stage, called an orientation stage 21 and a third stage, called a diffusion screen 22.
  • Said stages each have openings for the passage of a flow of fluid 7, for example air.
  • Said tray is intended to be used in a room.
  • Said tray is located at a distance from the ground so that the operator can stand up by handling products above said tray.
  • the upper face 202 of said plate is located at a height adapted to the ground, for example between 0.6 and 1.7 meters, to allow an operator, who is standing, to handle the products comfortably. This height is adjusted if the working position differs from the standing position, so that the upper face of the plate remains accessible to the operator.
  • the openings 205 of the rectifying stage 20 open on the lower face 200 of the diffusion plate 2 and communicate with the openings 215 of the orientation stage 21.
  • Said openings 205 of the rectifying stage 20 are configured to orient the flow of fluid, entering the diffusion plate 2 by its face lower 200, in a first direction, for example vertical.
  • the axis of each of the openings of the rectifying stage 20 is thus perpendicular to the lower face 200 of the plate.
  • the openings 215 of the orientation stage 21 communicate with the openings of the diffusion screen 22.
  • the thickness of the diffusion screen 22 is very small compared to that of the other stages so that the openings of this screen are not shown in the figures.
  • Said openings of the orientation stage 21 are configured to orient the flow of fluid 7, leaving the openings of the recovery stage 20, in a second direction oblique with respect to said first direction.
  • said axis of each opening of the orientation stage 21 is inclined relative to that of each opening of the 20 up stage, so that the opening passages defined by the openings between the lower face 200 and the upper face 202 of the plate 2 each have a bent direction.
  • Each opening of the diffusion screen 22 opens on the upper face 202 of the plate 2 and has a passage section whose surface is smaller than that of each of said openings 215 of the orientation stage 21 as well as that of the openings 205 of the righting stage 20.
  • Said plate 2 thus has a plurality of through passages allowing a flow of fluid to pass from one face 200 to the other 202 of said plate 2, that is to say allowing the diffusion of a fluid on the side of the upper face of the tray facing the operating zone 100, while straightening the incoming flow on the side of the lower face, then tilting it to diffuse it through the screen 22 at the level of the area of operation100.
  • the diffused stream exits the upper face with the inclination defined by the openings of the orientation stage.
  • the diffused flux is thus inclined with respect to the upper face 202 of the plate.
  • the inclination is chosen so that the flow exiting the plate is distributed in the direction of a spacing relative to the free end edge of the plate at which the operator is intended to position themselves to manipulate the products.
  • Such a plateau design thus makes it possible to limit the risk of diffusion of the flow on the operator's head so that the operating zone above the plateau is protected by the flow diffused with respect to external pollution while maintaining a working comfort for the operator who remains on the side of said free end edge of the tray, can keep his trunk and his head away from the air flow diffused.
  • the separation zone 201 of the straightening stage 20 and of the orientation stage 21 has a part 201a substantially parallel to the upper face 202 of the diffusion plate 2, located at the central part of the plate, and an inclined portion 201b from a low point PB in the extension of the parallel portion 201a to a high point PH spaced from the center of the plate relative to the low point and located at the free end edge.
  • the diffusion plate has a free end side, also called external edge, at which the operator is positioned to handle products on and / or above said plate 2.
  • said high point PH is located on the upper edge of the plate 2 which forms the junction edge between the upper face 202 of the plate and the outer edge 212.
  • Said part inclined from a low point PB up to a high point PH separated from the center of the plateau with respect to the low point may be a straight part forming a rectilinear slope as illustrated in FIG. figure 3 .
  • said inclined portion 201 may be a curved portion, for example in a circular arc that extends from the low point PB in the extension of the parallel portion 201b to the high point PH with a center of curvature located on the upper face side 22 of the plate 2.
  • the flux diffused in the upper face near the outer edge 212 is slightly lower than elsewhere. The speed profile decreases towards said outer edge, which reduces the entrainment of external pollution at the edge.
  • the outer edge 212 is perpendicular to the upper and lower faces of the plate.
  • the inclined portion of the separation zone extends the parallel portion to the outer edge of the tray. Such inclination of the portion of the separation zone 201 between the rectifying stage 20 and the orientation stage 21 situated on the side of the slice 212 of the plate, makes it possible to obtain a diffusion of fluid at the outlet of the plate 2 even close to the operator while maintaining an orientation of the flow in the direction of a spacing relative to the operator.
  • said high point PH is located on the or near the upper outer edge of the diffusion plate 2, defined by the junction of the upper face 202 of the plate and said outer portion 212.
  • Said second direction corresponding to the orientation of the openings 215 of the orientation stage 21 is chosen so as to direct the flow of fluid 7 in the upper face 202 of the plate 2 away from the outer edge 212 of the plateau of diffusion 2, to prevent the operator is embarrassed by this flow.
  • this orientation is achieved by inclination of the flux through the plate 2 of diffusion with respect to its direction of entry into the plate 2 that impresses the rectification stage 20.
  • said device comprises a working plane 1, preferably of thickness substantially equal to that of the plate 2 of diffusion, which extends the diffusion plate 2 at least on the side of the slice 211, called the inner slice, of the diffusion plate 2.
  • Said inner slice is defined in contrast to the external slice 212 at which an operator 9 is able to position itself to manipulate products above the plate 2 diffusion.
  • the diffusion plate is positioned in a through opening provided at or near an end of the work plane.
  • each opening of a stage forms, with the openings of the two other stages with which it communicates, a fluid passage duct.
  • the volume VF of the diffusion plate 2 delimited between the inner wafer 211 and the fluid flow passage ducts which open on the upper face 202 in the immediate vicinity of the work plane 1, that is to say on the of the internal slice 211, is closed by the slice 101 of the worktop 1, so that the volume VF is a "dead" volume which can thus be replaced by a solid material without affecting the diffusion of the flow in the upper face of the tray.
  • the orientation stage 21 and the rectifying stage 20 each have a honeycomb structure, preferably honeycomb. Said cells then form the openings of said stage. The axis of the cells of the orientation stage 21 is thus inclined with respect to that of the cells of the rectifying stage.
  • each honeycomb is such that the cells are contiguous in a regular polygonal pattern.
  • circular-based cells are contiguous in a hexagonal pattern.
  • the superposition of the two honeycombs can be such that the cells are offset at the junction, and that the vacuum, that is to say the passage of air, honeycomb honeycomb meets the full, that is to say, the partition, the other Honeycomb.
  • the rectification stage 20 comprises a honeycomb with cavities of 3 to 6 millimeters in diameter, orthogonal to the upper face 202 of the plate, and that the stage 21 comprises a honeycomb with cells of 3 to 6 millimeters in diameter, at 45 ° oblique direction relative to the upper face 202 of the plate.
  • the thickness or height of the diffusion plate is of the order of 50 millimeters.
  • the offset between the openings of the straightening and orientation stages, in a direction transverse to the normal to the upper or lower face of the plate, makes it possible to redistribute the fluid flow from the straightening stage to the stage. 21 orientation by breaking the boundary layers of the fluid flow. It is also possible to provide a day between the recovery and orientation stages, height corresponding preferably to 10% maximum of the cumulative height of the recovery stages and orientation. Such a day, that is to say a space in a direction substantially parallel to the normal to the upper or lower face of the plate, improves the redistribution of the flux while substantially maintaining the rectified orientation of the flow output of the righting stage.
  • said diffusion screen 22 is formed by a woven fabric, preferably of plastic, such as polyethylene, whose meshes, for example of square shape and 300 micrometers side, form said openings of the screen 22 of diffusion.
  • said diffusion screen is formed by a nonwoven web, preferably also plastic, such as polyethylene, pierced to form the openings of said screen.
  • plastic can also be polyester or polyamide.
  • polyethylene has the advantage of limiting the risk of scratches on objects handled when they are in contact with the screen.
  • Said diffusion screen may also be formed by a pierced film, for example plastic, preferably polyethylene, whose holes form said openings of said diffusion screen.
  • Said diffusion screen may also be formed by a grid or a porous material.
  • said device comprises a box 8 having an air inlet 81 and an air outlet 82 opening on the lower face 200 of the diffusion plate 2.
  • a fan 6 is arranged inside the box 8 to circulate a stream fluid from the inlet 81 to the outlet 82 of said box 8 corresponding to the inlet of the diffusion plate defined by its underside 200.
  • Said device is equipped with means for regulating the speed of the fluid flow.
  • Said speed control means comprise a speed sensor, located between the fan 6 and the air outlet 82 of the box 8, and a control unit 61 of the fan 6 as a function of the fluid flow velocity acquired by the sensor 5 to maintain the speed of the fluid flow at the outlet of the diffusion plate 2 substantially equal to a set value despite possible partial closure of the upper surface by the manipulated object and / or by the operator.
  • said sensor 5 is positioned at a point where the total pressure of the fluid, defined as the sum of the static pressure and the dynamic pressure, is close to that of the fluid just at the outlet of the diffusion plate 2.
  • Said speed sensor 5 comprises a housing 52 which extends through a wall of the box 8 and in which are provided a fluid inlet 51 on the inside side of the box and an outlet 53 of fluid on the outside side. of the box.
  • Said housing 52 houses a probe 50 for acquiring the speed of the flow of fluid flowing between the inlet and the outlet of the housing 52.
  • the inlet 51 of the sensor is formed by an opening in the housing 52. covered with a screen of the same type, that is to say which has the same aerodynamic characteristics, in particular in terms of pressure drop generated, as that of the screen 22 of diffusion so as to create a loss of head at the level of the input of the sensor 5 slightly lower than that of the plate 2.
  • the pressure drop associated with the plate 2 results not only from the pressure drop associated with the diffusion screen 22 but also from the slight loss of pressure induced. by the other stages 20, 21 of the plate 2.
  • Such a design of the sensor 5 makes it possible to reliably measure a speed of the fluid flow corresponding to a speed substantially equal to or slightly greater than that coming from the plate 2.
  • Said device comprises a filter, called prefilter 30, located upstream of the fan 6, preferably at the inlet of said box.
  • Said device also comprises a filter 31 located downstream of the fan 6, preferably between the fan 6 and the speed sensor 5.
  • the filters are adapted to obtain an ISO5 class cleanliness defined in the ISO 14644-1 standard.
  • said box 8 is located under the plane passing through the lower face 200 of the plate 2 of diffusion.
  • the rear side, opposite to the front side of the plate, delimited by said inner portion 211 of the plate is extended by the work plane 1.
  • the upper face 12 of the work plane is flush with the upper face 202 of the diffusion plate.
  • a portion of said box is located under the plate 2 of diffusion, the other part being located under the plane 1 of work.
  • the disposition of said box to a height less than that of the diffusion plate makes it possible to limit the visual bulk of the operator.
  • said device can also be equipped with means of regulation of the temperature of the fluid flow.
  • Such a design of the protection device allows the manipulation of objects supporting a breath of air at 0.6m / s, without detachment of the blower surface, in an atmosphere guaranteeing an ISO5 cleanliness level.
  • the manipulated objects can thus be small.
  • the object manipulation on or above the diffusion plate 2 can be carried out without detachment of the latter from the upper face 202, also called the blowing surface, of the plate, under conditions that are comfortable for the operator, by ensuring surface continuity 202 between the blowing surface of the plate 2 and that of the non-blowing plane 1 of the work plane, so as to obtain an assembly formed of the working plane 1 and the plate 2 of diffusion which is free of projecting portion.
  • the device can be easily integrated in an existing workstation with a limited space of the entire device, replacing the portion of the work plane corresponding to the operating field, by the diffusion plate as described above.
  • Such a design of the device according to the invention makes it possible to stabilize the speed of the fluid flow at the outlet of the plate.
  • the regulation of the speed of the fluid flow makes it possible to obtain a difference of about 15%, or even less, with respect to the set speed, for a closure of the blowing surface of up to 50%, handling the objects on and / or above said blowing surface.
  • the target speed can be for example from 0.45m / s to 20 millimeters downstream of the blowing surface.
  • the tray described above can also be used as a diffusing ceiling allowing the operator to manipulate objects under said tray used ceiling.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Flow Control Members (AREA)

Claims (16)

  1. Schutzvorrichtung einer Betriebszone (100), insbesondere für die Handhabung von Produkten,
    wobei die Vorrichtung einen als Verteilungstisch bezeichneten Tisch (2) umfasst, der zwei gegenüberliegende Flächen, eine sogenannte obere Fläche (202), die zur Betriebszone (100) gerichtet ist, und die andere, sogenannte untere Fläche (200) aufweist,
    wobei der Verteilungstisch (2) eine als Gleichrichtungsetage (20) bezeichnete erste Etage, eine als Ausrichtungsetage (21) bezeichnete zweite Etage und eine als Verteilungsschirm (22) bezeichnete dritte Etage umfasst, wobei jede Etage Durchgangsöffnungen eines Fluidstroms (7) aufweist,
    wobei die Öffnungen (205) der Gleichrichtungsetage (20) in die untere Fläche (200) des Verteilungstischs (2) ausmünden und mit den Öffnungen (215) der Ausrichtungsetage (21) kommunizieren, wobei die Öffnungen (205) der Gleichrichtungsetage (20) konfiguriert sind, um den Fluidstrom, der in den Verteilungstischs (2) durch seine untere Fläche (200) eintritt, gemäß einer ersten, beispielsweise vertikalen Richtung auszurichten,
    wobei die Öffnungen (215) der Ausrichtungsetage (21) mit den Öffnungen des Verteilungsschirms (22) kommunizieren, wobei die Öffnungen der Ausrichtungsetage (21) konfiguriert sind, um den Fluidstrom (7), der aus den Öffnungen der Gleichrichtungsetage (20) austritt, gemäß einer zweiten, in Bezug zur ersten Richtung und in Bezug zur oberen Fläche (202) des Tischs (2) schrägen Richtung auszurichten,
    wobei jede Öffnung des Verteilungsschirms (22) auf der oberen Fläche (202) des Tischs (2) ausmündet und einen Durchgangsquerschnitt aufweist, dessen Fläche kleiner ist als der jeder der Öffnungen (215) der Ausrichtungsetage (21),
    dadurch gekennzeichnet, dass die Separationszone (201) der Gleichrichtungsetage (20) und der Ausrichtungsetage (21) einen als parallelen Teil bezeichneten Teil (201 a) aufweist, der zur oberen Fläche (202) des Verteilungstischs etwa parallel ist, und einen als geneigten Teil bezeichneten Teil (201 b), der in Bezug zur oberen Fläche (202) geneigt ist, wobei sich der geneigte Teil (201 b) zwischen dem parallelen Teil (201 a) und einer Seite eines freien Endes (212) des Tischs (2) erstreckt, in dessen Bereich sich ein Bediener aufstellen kann,
    und dass sich der geneigte Teil (201 b) von einem niedrigen Punkt (PB), der sich im Bereich des parallelen Teils (201 a) befindet, bis zu einem hohen Punkt (PH), der sich im Bereich der Seite des freien Endes des Tischs befindet, erstreckt.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der geneigte Teil (201 b) gerade ist.
  3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der geneigte Teil (201 b) gekrümmt ist und das Krümmungszentrum des geneigten Teils (201 b) zur oberen Fläche (22) des Tischs (2) ausgerichtet ist.
  4. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Dicke des Verteilungsschirms (22) geringer ist als die der Ausrichtungsetage (21) oder der Gleichrichtungsetage (20).
  5. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Vorrichtung eine als Arbeitsfläche (1) bezeichnete Platte umfasst mit einer Dicke, die etwa der des Verteilungstischs (2) entspricht, die den Verteilungstischs (2) auf der Seite einer als innere Schmalseite bezeichneten Schmalseite (211) des Verteilungstischs (2) verlängert, die der als äußere Schmalseite bezeichneten Schmalseite (212) gegenüberliegt, in deren Bereich sich ein Bediener (9) positionieren kann, um Produkte auf dem Verteilungstisch (2) zu handhaben,
    und dass die zweite Richtung, die der Ausrichtung der Öffnungen (215) der Ausrichtungsetage (21) entspricht, derart gewählt ist, dass der Fluidstrom (7) auf der oberen Fläche (202) des Tischs (2) gelenkt und dabei von der äußeren Schmalseite (212) des Verteilungstischs (2) entfernt wird.
  6. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass sich der hohe Punkt (PH) auf der oder in der Nähe der äußeren oberen Kante des Verteilungstischs (2) befindet, die durch das Zusammentreffen der oberen Fläche (202) des Tischs und der äußeren Schmalseite (212) bestimmt ist.
  7. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Ausrichtungsetage (21) und/oder die Gleichrichtungsetage (20) eine Waben-, vorzugsweise eine Bienenwabenstruktur umfassen, wobei die Waben die Öffnungen der Etage bilden.
  8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass die Waben der Ausrichtungsetage (21) in Bezug zu den Waben der Gleichrichtungsetage (20), mit denen sie kommunizieren, versetzt sind.
  9. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Verteilungsschirm (22) von einem Gewebe, vorzugsweise aus Kunststoff wie Polyethylen gebildet ist.
  10. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Vorrichtung einen Kasten (8) umfasst, der einen Lufteinlass (81) und einen Luftauslass (82), der auf der unteren Fläche (200) des Verteilungstischs (2) ausmündet, und einen Lüfter (6) aufweist, der vorzugsweise im Innern des Kastens (8) ausgebildet ist, um einen Fluidstrom (7) vom Eingang zum Ausgang des Kastens (8) zur Zirkulation zu veranlassen.
  11. Vorrichtung nach Anspruch 10, dadurch gekennzeichnet, dass die Vorrichtung Regulationsmittel der Geschwindigkeit des Fluidstroms umfasst, wobei die Regulationsmittel der Geschwindigkeit einen Geschwindigkeitssensor (5) und eine Steuereinheit (61) des Lüfters (6) in Abhängigkeit von der vom Sensor (5) erfassten Geschwindigkeit des Fluidstroms umfassen, um die Geschwindigkeit des Fluidstroms am Ausgang des Verteilungstischs (2) etwa auf einem Sollwert zu halten.
  12. Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, dass der Geschwindigkeitssensor (5) ein Gehäuse (52) umfasst, das sich durch eine Wand des Kastens (8) erstreckt und in welchem ein Fluideingang (51) von der Seite des Innern des Kastens und ein Fluidausgang (53) von der Seite des Äußeren des Kastens ausgebildet sind, wobei das Gehäuse (52) eine Erfassungssonde (50) der Geschwindigkeit des zwischen dem Eingang und dem Ausgang des Gehäuses (52) zirkulierenden Fluidstroms aufnimmt,
    und dass der Sensor (5) ausgebildet ist, um einen Lastverlust gegenüber dem ihn durchquerenden Fluid zu erzeugen, der etwa dem entspricht, der vom Verteilungsschirm (22) erzeugt wird.
  13. Vorrichtung nach einem der Ansprüche 11 und 12, dadurch gekennzeichnet, dass sich der Geschwindigkeitssensor (5) zwischen dem Lüfter (6) und dem Luftauslass (82) des Kastens (8) befindet.
  14. Vorrichtung nach einem der Ansprüche 10 bis 13, dadurch gekennzeichnet, dass die Vorrichtung einen als Vorfilter bezeichneten Filter (30), der sich vorstromig zum Lüfter (6) befindet, vorzugsweise am Eingang des Kastens, und/oder einen Filter (31), der sich nachstromig zum Lüfter (6) befindet, vorzugsweise zwischen dem Lüfters (6) und dem Geschwindigkeitssensor (5), umfasst.
  15. Vorrichtung nach einem der Ansprüche 10 bis 14, dadurch gekennzeichnet, dass sich der Kasten (8) unter der Ebene befindet, die durch die untere Fläche (200) des Verteilungstischs (2) verläuft.
  16. Verfahren zur Handhabung von Produkten auf einem als Verteilungstisch bezeichneten Tisch, dadurch gekennzeichnet, dass der Verteilungstisch Teil einer Schutzvorrichtung einer Betriebszone (100) nach einem der vorangehenden Ansprüche ist und wobei der auf der oberen Fläche verteilte Fluidstrom in einer in Bezug zur Normalen des Tischs schrägen Richtung gelenkt wird,
    und dass sich ein Bediener an der Seite des Tischs positioniert, die entgegengesetzt zum Richtungssinn des auf der oberen Fläche verteilten Fluidstroms ist.
EP14177330.9A 2013-07-18 2014-07-16 Schutzvorrichtung einer Betriebszone, und entsprechendes Verfahren Active EP2848873B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1357048A FR3008782B1 (fr) 2013-07-18 2013-07-18 Dispositif de protection d'une zone d'operation et procede correspondant

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EP2848873A1 EP2848873A1 (de) 2015-03-18
EP2848873B1 true EP2848873B1 (de) 2016-09-07

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3530781A (en) * 1968-04-11 1970-09-29 Lundberg Concrete Pipe Co Inc Transformer housing and vented cover assembly
US3660956A (en) * 1970-06-29 1972-05-09 Brooks Products Inc Grating construction
GB1583995A (en) * 1976-06-05 1981-02-04 Colt Int Ltd Ventilators
WO2011099643A1 (ja) * 2010-02-15 2011-08-18 興研株式会社 局所クリーンゾーン形成装置

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FR3008782A1 (fr) 2015-01-23
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