EP0830549A1 - Close contamination protection device - Google Patents

Close contamination protection device

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Publication number
EP0830549A1
EP0830549A1 EP96913582A EP96913582A EP0830549A1 EP 0830549 A1 EP0830549 A1 EP 0830549A1 EP 96913582 A EP96913582 A EP 96913582A EP 96913582 A EP96913582 A EP 96913582A EP 0830549 A1 EP0830549 A1 EP 0830549A1
Authority
EP
European Patent Office
Prior art keywords
gas
products
work
decontaminated
plane
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP96913582A
Other languages
German (de)
French (fr)
Other versions
EP0830549B1 (en
Inventor
Philippe Chevalier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
UNIR Ultra Propre Nutrition Industrie Recherche
Unir
Original Assignee
UNIR Ultra Propre Nutrition Industrie Recherche
Unir
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by UNIR Ultra Propre Nutrition Industrie Recherche, Unir filed Critical UNIR Ultra Propre Nutrition Industrie Recherche
Publication of EP0830549A1 publication Critical patent/EP0830549A1/en
Application granted granted Critical
Publication of EP0830549B1 publication Critical patent/EP0830549B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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 relates in general to the close protection of a work station located in a contaminated atmosphere, and more particularly to a method and a device for close protection of products sensitive to contamination by agents. contaminants conveyed by the atmosphere, said products being positioned on a work surface.
  • workstations are located in so-called "white" rooms in which the air is filtered and treated so that the level of dust is below a threshold. admissible controlled and subject to strict regulations.
  • the invention provides a new method of close protection of products sensitive to air contamination, these products being positioned on a work surface, according to which one directs on either side of said products at least one gas stream decontaminates substantially parallel to said work plan towards said products, each gas stream escaping from the work plan from a median region located between the edges of said work plan in a direction substantially perpendicular to said work plan, or conversely, at least one stream of decontaminated gas is directed above the work surface in a middle region of the work surface located between the edges of the latter in a direction substantially perpendicular to said work plane towards said products, each gas stream s 'evacuating the work plan in a direction substantially parallel to said work plan on either side of said products.
  • the products positioned on the work surface are isolated from the contaminated environment by a flow of decontaminated gas which covers them, and which flows either vertically downwards towards the work surface and then transversely towards the edges of said surface. , or from the edges of said work plan transversely to said products, then vertically upwards from said work plan.
  • the contamination provided by the personnel working on the sensitive products positioned on the work surface is then automatically entrained by the flow of decontaminated gas along one or other of the routes, towards the outside of said work surface without this contamination does not reach said products.
  • each flow stream is optimized.
  • the products being arranged in a horizontal direction X one directs on either side of said direction X, in a direction Y substantially transverse to said direction X, two veins of decontaminated gas towards said products, said gas streams evacuating in a vertical direction Z substantially perpendicular to said direction X, or conversely a stream of decontaminated gas is directed towards said products in the vertical direction Z substantially perpendicular to said direction X , said gas stream evacuating in direction Y substantially transverse to said direction X, on either side of said direction X.
  • each gas stream is sucked above said products or vice versa each gas stream is sucked on either side of said products.
  • sucking the veins of sterile gas carrying the contaminated particles it is avoided, if necessary, the fallout of the heavier contaminated particles on the products.
  • the products being aligned on a conveyor belt which runs in the direction X two veins of decontaminated gas are directed towards the middle from the longitudinal edges of said belt.
  • a vein of decontaminated gas is directed towards the belt and it is sucked towards the longitudinal edges of said belt conveying the veins of decontaminated gas.
  • the method according to the invention can be improved to adapt it to work surfaces or conveyor belts which are not tightly connected to the frame.
  • a vein of decontaminated gas is directed on the sides and under the worktop or conveyor belt so that the worktop or conveyor belt is enveloped by the protective veins.
  • the method according to the invention consists in blocking the induction by deflecting a part of each vein of decontaminated gas substantially parallel to the work plan, previously described, towards the edges of said mat.
  • the close protection device comprises insufflation means capable of producing on either side of the products at least one stream of decontaminated gas in the direction of the products, each stream of decontaminated gas following a path all first oriented substantially parallel to said work plan so that each stream of decontaminated gas licks said products, then directed from a middle region of the work plan located between the edges of the latter, substantially perpendicular to said work plan, or vice versa directed in a middle region of the work surface located between the edges of the latter towards the products substantially perpendicular to said work plane, then oriented substantially parallel to said work plane on either side of said products.
  • the insufflation means comprise at least one gas inlet and at least two decontaminated gas outlets facing each other, each gas outlet being in the form of a slot positioned on one side of the work surface and extending longitudinally to the X direction of product positioning.
  • suction means comprise a suction mouth disposed above the work surface facing said products, in a median region located between the two decontaminated gas outlets from the blowing device.
  • the insufflation means comprise a gas inlet, and a decontaminated gas outlet positioned facing the products above the work surface in a middle region of said workplan.
  • the suction means comprise two suction mouths arranged facing one another, each suction mouth being in the form of a slot positioned on one side of said work surface and extending longitudinally to said direction X.
  • the protection device can be improved to adapt it to unsealed worktops.
  • the device comprises additional insufflation means comprising at least one gas inlet which may be that of the main insufflation means and at least two decontaminated gas outlets facing each other, each outlet gas in the form of a slot positioned at the edge and under the work surface and extending longitudinally to the direction X of positioning of the products.
  • the gas streams evacuating according to the plane of symmetry perpendicular to the work plane.
  • the device comprises a lower duct making it possible to circulate a stream of gas along the lower face as well as along the edges of the work surface or conveyor belt.
  • the insufflation means comprise at least one gas inlet and at least two outlets of decontaminated gas in looking at each other, each gas outlet in the form of a slot positioned on one side of the work surface and extending longitudinally to the direction X of positioning of the products and are provided with a means aerodynamics ensuring the deflection of a part of the vein of decontaminated gas along the edges of said conveyor belt in a direction perpendicular to the plane thereof.
  • FIG. 1 is a schematic perspective view of a close protection device according to the invention, mounted on a work station,
  • FIG. 2 is a schematic view in vertical section of part of an insufflation apparatus forming part of the close protection device according to the invention
  • FIG. 3 is a schematic front view of an alternative embodiment of the close protection device of Figure 1.
  • FIG. 4 is a schematic cross-sectional view of an alternative embodiment of the protection device provided with auxiliary insufflation means.
  • FIG. 5 is a schematic cross-sectional view of another alternative embodiment of the protection device provided with auxiliary insufflation means.
  • FIG. 6 is a schematic cross-sectional view of another alternative embodiment of the protection device provided with an aerodynamic means for deflecting the horizontal gas stream.
  • a work station comprising a frame 30 supporting a work surface P on which are arranged in a row in a horizontal direction X products 10 sensitive to air contamination, for example food products. Provision may be made for the work surface P to be formed by a conveyor belt capable of running said products 10 in the direction X.
  • the personnel having to intervene on these sensitive products 10, are positioned on either side of the frame 30 and intervene on the products 10 from above.
  • This device comprises an insufflation apparatus 200 of a decontaminated gas comprising on each longitudinal side (only one of which is visible here) of said work plan P, here two inlets 201 of a decontaminated gas, for example sterile air.
  • a decontaminated gas for example sterile air.
  • These inlets 201 are positioned at a distance from each other on each longitudinal side of said work surface P and open into an enclosure provided with a sterile air outlet 202 in the form of a slot extending longitudinally to said direction X over the entire length of the side of the working plane P.
  • the two outlet slots 202 of the blowing device are located at the level of the working plane P on which the products 10 are arranged and are arranged opposite l one of the other.
  • the device shown in FIG. 1 comprises a suction device 100 for blown decontaminated gas, comprising a suction mouth 101 in the form of a slot, extending longitudinally to the positioning direction X of the products 10, and positioned above the work plane P, facing said products in a middle region of the work plane located between the two outgoing slots 202 of the insufflation apparatus 200.
  • the suction device 100 here has two air outlets 102 located above the suction mouth 101 so that they allow the flow of aspirated gas 102 to be evacuated upwards. These two gas outlets 102 are positioned at a distance from each other near the end edges of said suction mouth 101. Of course, according to a variant not shown, a greater number of outlets can be provided. gas.
  • the suction device 100 is mounted integral with the insufflation device 200 using support arms 1 10 so that it is suspended above the worktop P.
  • support arms 1 10 there are provided four support arms 1 10 arranged in pairs, each pair of support arms 1 10 is positioned on either side of the suction mouth 101 and is fixed on the one hand to the suction apparatus 100 and on the other hand, to an enclosure of the insufflation device 200.
  • Such a device operates in the following manner.
  • a sterile air flow enters the insufflation apparatus 200 through the inlets 201 and is distributed over the products through the outlet slots 202 of said insufflation apparatus so that the sterile air leaving said slots 202 follows a path A directed essentially parallel to said plane P, transverse to said direction X.
  • the air sterile from these slots 202 then licks the products 10 located on the work surface P.
  • the suction device 100 sucks through its suction mouth 101 the sterile air coming from the outlet slots 202 of the device insufflation.
  • the air from the outlet slots 202 of the suction device is therefore sucked into a middle region of the work plane P so that the path A of the sterile air flow is deflected upward perpendicular to said plane of work P on which the products are positioned 10.
  • Two main veins of sterile air 1, 2 come from said outlet slots 202. These two veins 1, 2 are directed towards each other and meet in a median region from the work surface to form an upwardly directed flow stream perpendicular to said work plane P in the direction of the suction mouth 101.
  • the sterile air jets coming from the exit slots meet face to face, in the middle region of the work plan, which has the effect of naturally creating a central vein which evacuates in a vertical perpendicular direction to said direction X towards the top of said plane entraining the contaminated particles.
  • FIG. 3 another alternative embodiment of the device in FIG. 1 is shown.
  • the blowing device 200 of decontaminated gas is mounted above the work plane P, and the suction device is positioned on the frame 30, along the longitudinal sides of said work plane P, longitudinally at product positioning direction X 10.
  • the insufflation device 200 is mounted integral with the suction device 100 by means of the same support arm system 1 already described above.
  • the insufflation device 200 has a gas inlet 201 and a decontaminated gas outlet 202.
  • This sterile gas outlet 202 is in the form of a slot extending longitudinally in the direction X above the plane P opposite said products 10.
  • the suction device 100 has two suction ports 101 in the form of two slots
  • suction vents 101 extending on the longitudinal sides of said work plane P. These suction vents 101 are connected to air outlets 102.
  • the insufflation device 200 produces, through its outlet 202, a vein of decontaminated gas 3 in the direction of the products 10 located on the plane P.
  • This vein of decontaminated gas 3 follows a path A directed perpendicular to said plane P.
  • this vein of decontaminated gas 3 comes into contact with said plane P, it separates into two flow streams 1, 2 which follow paths A oriented essentially parallel to said plane P and transversely to the direction X of positioning of said products 10, in opposite directions so that the sterile air flow streams lick the products 10 positioned on the plane P.
  • These decontaminated gas flow streams 1, 2 are sucked in by the suction outlets 101 of the suction apparatus 100 so that the gas is evacuated on the sides of the worktop P.
  • FIG 2 there is shown in vertical section, a detail view of the interior of an embodiment of part of a blowing device forming part of an anti ⁇ microbial protection device according to l 'invention.
  • This embodiment of the insufflation apparatus is a variant of that shown in Figure 1
  • the insufflation apparatus comprises on each side of the work plane P a gas inlet 201 positioned on the sides of the plane P below said plane P so that the gas entering said apparatus is transported along a vertical path upwards in the direction of an outlet in the form of a slot 202 situated at the level of said plane P.
  • This blowing device 200 comprises in a housing which extends vertically on the side of the frame 30, between inlet 201 and outlet 202, a grease filter 21 1 which extends horizontally over the entire width of the housing, relative to the vertical direction F of entry of the gas flow into said insufflation device, then successively a pre-filter 212 which also extends over the entire width of the housing, a fan 213 which makes it possible to transport the filtered gas to the upper part of the device 200.
  • This fan 213 is positioned in a baffle path 214 formed by deflectors 214a of the gas flow so that at the exit of this baffle path the flow of filtered gas flows in the vertical direction F directed upwards of the insufflation device 200.
  • baffle path 214 Above the baffle path 214 is arranged in parallel a pair of absolute filters 215 whose efficiency is advantageously equal to or greater than that of a very high efficiency filter (standardized filter ). These filters 215 extend in said vertical direction F. Above the absolute filters 215 is positioned in a horizontal direction an anti-turbulence grid so as to reduce the turbulence rate of the sterile air flow which opens into a enclosure 217 having an angled path, and converging in order to further reduce the turbulence rate, bringing the flow of decontaminated gas to the slot-shaped outlet 202 directed in a direction substantially transverse to the direction X.
  • an anti-turbulence grid so as to reduce the turbulence rate of the sterile air flow which opens into a enclosure 217 having an angled path, and converging in order to further reduce the turbulence rate, bringing the flow of decontaminated gas to the slot-shaped outlet 202 directed in a direction substantially transverse to the direction X.
  • FIG 4 there is shown schematically a workstation P on which are arranged in a line in a horizontal direction X products 10 sensitive to air contamination.
  • the work surface is not tightly connected to the rest of the frame 30. As a result, there may be an induction of contaminated air by the space left free between the work surface and the frame.
  • Two additional sterile air outlets 203 are provided in the form of a slot extending longitudinally in said direction X over the entire length at the edges and under the worktop P.
  • An identical air outlet 202 to that described in Figure 1 and Figure 2 is also provided.
  • the gas stream 204 is distributed on either side of the work plane along a path bypassing the edges of said plane then sweeping the underside of said plane to the longitudinal center line of said plane where the gas veins meet direct in one direction perpendicular to said plane.
  • FIG. 5 which includes the same work station P not connected to the frame 30 as in FIG. 4, a U-shaped profile 205 fixed under the frame forms a duct bringing under the work station P a stream of lightly sterile air. overpressure preventing any induction of air contaminated by the spaces left free due to the lack of sealing between the frame and the worktop.
  • the device comprises a conveyor belt P whose traction chain (not shown) creates a lack of tightness with the frame 30.
  • the outlets 202 are provided in the lower zone with an elbow 206 creating a conduit 207 diverting part of the sterile air flow towards the edges of the conveyor belt thereby preventing any induction of contaminated air.

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  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Ventilation (AREA)
  • Prevention Of Fouling (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Cleaning In General (AREA)
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  • Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)

Abstract

PCT No. PCT/FR96/00563 Sec. 371 Date Jan. 16, 1998 Sec. 102(e) Date Jan. 16, 1998 PCT Filed Apr. 12, 1996 PCT Pub. No. WO96/32613 PCT Pub. Date Oct. 17, 1996A method for closely protecting materials (10) sensitive to contamination by airborne contaminating agents and placed on a work surface (P). At least one decontaminated gas stream (1, 2) is fed from either side towards the materials in a direction substantially parallel to the work surface, and each gas stream (3) leaves the work surface in an intermediate area between the edges of the work surface and in a direction substantially perpendicular thereto. Alternatively, at least one gas stream is fed towards the materials from above the work surface at an intermediate area between the edges thereof, and in a direction substantially perpendicular thereto, and each gas stream leaves the work surface in a direction substantially parallel thereto and on either side of the materials.

Description

DISPOSITIF DE PROTECTION ANTI-CONTAMINATION RAPPROCHEE La présente invention concerne de manière générale, la protection rapprochée d'un poste de travail situé dans une atmosphère contaminée, et plus particulièrement un procédé et un dispositif de protection rapprochée de produits sensibles à la contamination par des agents contaminants véhiculés par l'ambiance, lesdits produits étant positionnés sur un plan de travail. The present invention relates in general to the close protection of a work station located in a contaminated atmosphere, and more particularly to a method and a device for close protection of products sensitive to contamination by agents. contaminants conveyed by the atmosphere, said products being positioned on a work surface.
Le problème de la protection de postes de travail contre l'aérocontamination se pose notamment dans l'industrie agro-alimentaire, l'industrie pharmaceutique ou encore dans le milieu hospitalier.The problem of protecting workstations against aerocontamination arises in particular in the food industry, the pharmaceutical industry or even in the hospital environment.
En générale, pour répondre à ce type de problème, les postes de travail sont situés dans des salles dites "blanches" dans lesquelles l'air est filtré et traité de sorte que le niveau d'empoussièrement se situe en- dessous d'un seuil admissible contrôlé et soumis à une réglementation sévère.In general, to respond to this type of problem, workstations are located in so-called "white" rooms in which the air is filtered and treated so that the level of dust is below a threshold. admissible controlled and subject to strict regulations.
De plus, l'air qui circule dans ces salles blanches est souvent régulé à une basse température.In addition, the air that circulates in these clean rooms is often regulated at a low temperature.
Le personnel devant travailler à de tels postes de travail doit être revêtu de tenue spécialisée pénible à enfiler et à porter. La protection rapprochée de chaque poste de travail individuel est une solution aux inconvénients précités.Staff working at such workstations must be dressed in specialized clothing which is difficult to put on and wear. Close protection of each individual workstation is a solution to the aforementioned drawbacks.
Toutefois, cette protection rapprochée doit tenir compte du fait que le personnel travaillant à ces postes de travail doit intervenir manuellement sur les produits sensibles à l'aérocontamination. Ceci interdit pour une telle protection rapprochée l'utilisation de tout flux vertical d'air stérile dont les dimensions sont égales ou supérieures à celles du poste à protéger de manière à recouvrir totalement d'air stérile ledit poste car un tel flux rabatterait sur les produits la contamination provenant des mains et des avant-bras des opérateurs. Dans ce contexte, l'invention propose un nouveau procédé de protection rapprochée de produits sensibles à l'aérocontamination, ces produits étant positionnés sur un plan de travail, selon lequel on dirige de part et d'autre desdits produits au moins une veine de gaz décontaminc sensiblement parallèlement audit plan de travail vers lesdits produits, chaque veine de gaz s'évacuant du plan de travail à partir d'une région médiane située entre les bords dudit plan de travail selon une direction sensiblement perpendiculaire audit plan de travail, ou bien réciproquement on dirige au moins une veine de gaz décontaminé au- dessus du plan de travail dans une région médiane du plan de travail située entre les bords de ce dernier selon une direction sensiblement perpendiculaire audit plan de travail vers lesdits produits, chaque veine de gaz s'évacuant du plan de travail selon une direction sensiblement parallèlement audit plan de travail de part et d'autre desdits produits.However, this close protection must take into account the fact that the personnel working at these work stations must intervene manually on products sensitive to aerocontamination. This prohibits for such close protection the use of any vertical flow of sterile air whose dimensions are equal to or greater than those of the station to be protected so as to completely cover said station with sterile air because such a flow would fall back on the products. contamination from operators' hands and forearms. In this context, the invention provides a new method of close protection of products sensitive to air contamination, these products being positioned on a work surface, according to which one directs on either side of said products at least one gas stream decontaminates substantially parallel to said work plan towards said products, each gas stream escaping from the work plan from a median region located between the edges of said work plan in a direction substantially perpendicular to said work plan, or conversely, at least one stream of decontaminated gas is directed above the work surface in a middle region of the work surface located between the edges of the latter in a direction substantially perpendicular to said work plane towards said products, each gas stream s 'evacuating the work plan in a direction substantially parallel to said work plan on either side of said products.
Ainsi, les produits positionnés sur le plan de travail sont isolés de l'environnement contaminé par un flux de gaz décontaminé qui les recouvre, et qui s'écoule soit verticalement vers le bas en direction du plan de travail puis transversalement vers les bords dudit plan, soit à partir des bords dudit plan de travail transversalement vers lesdits produits, puis verticalement vers le haut à partir dudit plan de travail.Thus, the products positioned on the work surface are isolated from the contaminated environment by a flow of decontaminated gas which covers them, and which flows either vertically downwards towards the work surface and then transversely towards the edges of said surface. , or from the edges of said work plan transversely to said products, then vertically upwards from said work plan.
La contamination apportée par le personnel intervenant sur les produits sensibles positionnés sur le plan de travail est alors entraînée automatiquement par le flux de gaz décontaminé suivant l'un ou l'autre des trajets, vers l'extérieur dudit plan de travail sans que cette contamination n'atteigne lesdits produits.The contamination provided by the personnel working on the sensitive products positioned on the work surface is then automatically entrained by the flow of decontaminated gas along one or other of the routes, towards the outside of said work surface without this contamination does not reach said products.
En outre, il convient de préciser que les dimensions de chaque veine de flux sont optimisées. Selon un mode de réalisation du procédé conforme à l'invention, les produits étant disposés selon une direction horizontale X, on dirige de part et d'autre de ladite direction X, selon une direction Y sensiblement transv ersale à ladite direction X, deux veines de gaz décontaminé vers lesdits produits, lesdites veines de gaz s'évacuant selon une direction verticale Z sensiblement perpendiculaire à ladite direction X, ou réciproquement on dirige une veine de gaz décontaminé en direction desdits produits selon la direction verticale Z sensiblement perpendiculaire à ladite direction X, ladite veine de gaz s'évacuant selon la direction Y sensiblement transversale à ladite direction X, de part et d'autre de ladite direction X.In addition, it should be noted that the dimensions of each flow stream are optimized. According to one embodiment of the method according to the invention, the products being arranged in a horizontal direction X, one directs on either side of said direction X, in a direction Y substantially transverse to said direction X, two veins of decontaminated gas towards said products, said gas streams evacuating in a vertical direction Z substantially perpendicular to said direction X, or conversely a stream of decontaminated gas is directed towards said products in the vertical direction Z substantially perpendicular to said direction X , said gas stream evacuating in direction Y substantially transverse to said direction X, on either side of said direction X.
Selon une caractéristique particulièrement av antageuse du procédé conforme à l'invention, on aspire chaque veine de gaz au-dessus desdiis produits ou réciproquement on aspire chaque veine de gaz de part et d'autre desdits produits. Ainsi, en aspirant les veines de gaz stérile transportant les particules contaminées, on évite, si cela est nécessaire, la retombée des particules contaminées plus lourdes sur les produits. Selon une caractéristique avantageuse de ce mode de réalisation du procédé selon l'invention, les produits étant alignés sur un tapis de convoyage qui défile selon la direction X, on dirige à partir des bords longitudinaux dudit tapis, deux veines de gaz décontaminé vers le milieu dudit tapis de convoyage et on aspire lesdites veines de gaz dans le plan de symétrie dudit tapis, ou réciproquement on dirige dans le plan de symétrie du tapis de convoyage, une veine de gaz décontaminé vers le tapis et on aspire vers les bords longitudinaux dudit tapis de convoyage les veines de gaz décontaminé. Le procédé selon l'invention peut être amélioré pour l'adapter aux plans de travail ou tapis de convoyage qui ne sont pas reliés de façon étanche au bâti. Selon cette variante, on dirige une veine de gaz décontaminé sur les côtés et sous le plan de travail ou tapis de convoyage de façon à ce que le plan de travail ou tapis de convoyage soit enveloppé par les veines de protection.According to a particularly advantageous feature of the process according to the invention, each gas stream is sucked above said products or vice versa each gas stream is sucked on either side of said products. Thus, by sucking the veins of sterile gas carrying the contaminated particles, it is avoided, if necessary, the fallout of the heavier contaminated particles on the products. According to an advantageous characteristic of this embodiment of the method according to the invention, the products being aligned on a conveyor belt which runs in the direction X, two veins of decontaminated gas are directed towards the middle from the longitudinal edges of said belt. said conveyor belt and said gas streams are sucked in the plane of symmetry of said conveyor, or conversely, in the plane of symmetry of the conveyor belt, a vein of decontaminated gas is directed towards the belt and it is sucked towards the longitudinal edges of said belt conveying the veins of decontaminated gas. The method according to the invention can be improved to adapt it to work surfaces or conveyor belts which are not tightly connected to the frame. According to this variant, a vein of decontaminated gas is directed on the sides and under the worktop or conveyor belt so that the worktop or conveyor belt is enveloped by the protective veins.
Dans le cas d'un tapis de convoyage où seule la chaîne de traction du tapis crée un manque d'étanchéité permettant l 'induction d'air contaminé, le procédé selon l'invention consiste à bloquer l'induction en déviant une partie de chaque veine de gaz décontaminé sensiblement parallèle au plan de travail, précédemment décrite, vers les bords dudit tapis.In the case of a conveyor belt where only the traction chain of the belt creates a lack of tightness allowing the induction of contaminated air, the method according to the invention consists in blocking the induction by deflecting a part of each vein of decontaminated gas substantially parallel to the work plan, previously described, towards the edges of said mat.
Le dispositif de protection rapprochée selon l'invention, comporte des moyens d'insufflation aptes à produire de part et d'autre des produits au moins une veine de gaz décontaminé en direction des produits, chaque veine de gaz décontaminé suivant un trajet tout d'abord orienté sensiblement parallèlement audit plan de travail de sorte que chaque veine de gaz décontaminé lèche lesdits produits, puis dirigé à partir d'une région médiane du plan de travail située entre les bords de ce dernier, sensiblement perpendiculairement audit plan de travail, ou réciproquement dirigé dans une région médiane du plan de travail située entre les bords de ce dernier vers les produits sensiblement perpendiculairement audit plan de travail, puis orienté sensiblement parallèlement audit plan de travail de part et d'autre desdits produits.The close protection device according to the invention comprises insufflation means capable of producing on either side of the products at least one stream of decontaminated gas in the direction of the products, each stream of decontaminated gas following a path all first oriented substantially parallel to said work plan so that each stream of decontaminated gas licks said products, then directed from a middle region of the work plan located between the edges of the latter, substantially perpendicular to said work plan, or vice versa directed in a middle region of the work surface located between the edges of the latter towards the products substantially perpendicular to said work plane, then oriented substantially parallel to said work plane on either side of said products.
Selon une caractéristique du dispositif conforme à l'invention, on peut prévoir des moyens d'aspiration du gaz décontaminé insufflé.According to a characteristic of the device according to the invention, it is possible to provide means for suction of the blown decontaminated gas.
Selon un premier mode de réalisation du dispositif de protection conforme à la présente invention, les moyens d'insufflation comprennent au moins une entrée de gaz et au moins deux sorties de gaz décontaminé en regard l'une de l'autre, chaque sortie de gaz se présentant sous la forme d'une fente positionnée sur un côté du plan de travail et s'étendant longitudinalement à la direction X de positionnement des produits. Selon une caractéristique avantageuse de ce premier mode de réalisation du dispositif conforme à l'invention, des moyens d'aspiration comprennent une bouche d'aspiration disposée au-dessus du plan de travail en regard desdits produits, dans une région médiane située entre les deux sorties de gaz décontaminé de l'appareil d'insufflation. Selon un deuxième mode de réalisation du dispositif de protection conforme à la présente invention, les moyens d'insufflation comprennent une entrée de gaz, et une sortie de gaz décontaminé positionnée en regard des produits au-dessus du plan de travail dans une région médiane dudit plan de travail. Selon ce mode de réalisation des moyens d'aspiration comprennent deux bouches d'aspiration disposées en regard l'une de l'autre, chaque bouche d'aspiration se présentant sous la forme d'une fente positionnée sur un côté dudit plan de travail et s'étendant longitudinalement à ladite direction X. Le dispositif de protection peut être amélioré pour l'adapter aux plans de travail non étanches.According to a first embodiment of the protection device according to the present invention, the insufflation means comprise at least one gas inlet and at least two decontaminated gas outlets facing each other, each gas outlet being in the form of a slot positioned on one side of the work surface and extending longitudinally to the X direction of product positioning. According to an advantageous characteristic of this first embodiment of the device according to the invention, suction means comprise a suction mouth disposed above the work surface facing said products, in a median region located between the two decontaminated gas outlets from the blowing device. According to a second embodiment of the protection device according to the present invention, the insufflation means comprise a gas inlet, and a decontaminated gas outlet positioned facing the products above the work surface in a middle region of said workplan. According to this embodiment of the suction means comprise two suction mouths arranged facing one another, each suction mouth being in the form of a slot positioned on one side of said work surface and extending longitudinally to said direction X. The protection device can be improved to adapt it to unsealed worktops.
Selon une première variante le dispositif comporte des moyens d'insufflation supplémentaires comprenant au moins une entrée de gaz qui peut être celle des moyens d'insufflation principaux et au moins deux sorties de gaz décontaminé en regard l'une de l'autre, chaque sortie de gaz se présentant sous la forme d'une fente positionnée au bord et sous le plan de travail et s'étendant longitudinalement à la direction X de positionnement des produits. Les veines de gaz s'évacuant selon le plan de symétrie perpendiculaire au plan de travail. Selon une seconde variante le dispositif comporte un conduit inférieur permettant de faire circuler une veine de gaz le long de la face inférieure ainsi que le long des bords du plan de travail ou tapis de convoyage.According to a first variant, the device comprises additional insufflation means comprising at least one gas inlet which may be that of the main insufflation means and at least two decontaminated gas outlets facing each other, each outlet gas in the form of a slot positioned at the edge and under the work surface and extending longitudinally to the direction X of positioning of the products. The gas streams evacuating according to the plane of symmetry perpendicular to the work plane. According to a second variant, the device comprises a lower duct making it possible to circulate a stream of gas along the lower face as well as along the edges of the work surface or conveyor belt.
Selon une autre variante adaptée à un tapis de convoyage où seule la chaîne de traction du tapis crée un manque d'étanchéité permettant l'induction d'air contaminé, les moyens d'insufflation comprennent au moins une entrée de gaz et au moins deux sorties de gaz décontaminé en regard l'une de l'autre, chaque sortie de gaz se présentant sous la forme d'une fente positionnée sur un côté du plan de travail et s'étendant longitudinalement à la direction X de positionnement des produits et sont pourvus d'un moyen aérodynamique assurant la déviation d'une partie de la veine de gaz décontaminé le long des bords dudit tapis de convoyage dans une direction perpendiculaire au plan de celui-ci.According to another variant suitable for a conveyor belt where only the traction chain of the belt creates a lack of tightness allowing the induction of contaminated air, the insufflation means comprise at least one gas inlet and at least two outlets of decontaminated gas in looking at each other, each gas outlet in the form of a slot positioned on one side of the work surface and extending longitudinally to the direction X of positioning of the products and are provided with a means aerodynamics ensuring the deflection of a part of the vein of decontaminated gas along the edges of said conveyor belt in a direction perpendicular to the plane thereof.
La description qui va suivre en regard des dessins annexés, donnés à titre d'exemples non limitatifs, fera bien comprendre en quoi consiste l'invention, et comment elle peut être réalisée. Sur les dessins annexés :The description which follows with reference to the appended drawings, given by way of nonlimiting examples, will make it clear what the invention consists of, and how it can be implemented. In the accompanying drawings:
- la figure 1 est une vue schématique en perspective d'un dispositif de protection rapprochée conforme à l'invention, monté sur un poste de travail,FIG. 1 is a schematic perspective view of a close protection device according to the invention, mounted on a work station,
- la figure 2 est une vue schématique en coupe verticale d'une partie d'un appareil d'insufflation faisant partie du dispositif de protection rapprochée conforme à l'invention,FIG. 2 is a schematic view in vertical section of part of an insufflation apparatus forming part of the close protection device according to the invention,
- la figure 3 est une vue schématique de face d'une variante de réalisation du dispositif de protection rapprochée de la figure 1.- Figure 3 is a schematic front view of an alternative embodiment of the close protection device of Figure 1.
- la figure 4 est une vue schématique en coupe transversale d'une variante de réalisation du dispositif de protection pourvu de moyens d'insufflation auxiliaires.- Figure 4 is a schematic cross-sectional view of an alternative embodiment of the protection device provided with auxiliary insufflation means.
- la figure 5 est une vue schématique en coupe transversale d'une autre variante de réalisation du dispositif de protection pourvu de moyens d'insufflation auxiliaires. - la figure 6 est une vue schématique en coupe transversale d'une autre variante de réalisation du dispositif de protection pourvu d'un moyen aérodynamique de déviation de la veine de gaz horizontale.- Figure 5 is a schematic cross-sectional view of another alternative embodiment of the protection device provided with auxiliary insufflation means. - Figure 6 is a schematic cross-sectional view of another alternative embodiment of the protection device provided with an aerodynamic means for deflecting the horizontal gas stream.
Sur la figure 1 , on a représenté un poste de travail comprenant un bâti 30 supportant un plan de travail P sur lequel sont disposés en file selon une direction horizontale X des produits 10 sensibles à l'aérocontamination, par exemple des produits alimentaires. On peut prévoir que le plan de travail P est formé par un tapis de convoyage apte à faire défiler lesdits produits 10 selon la direction X.In Figure 1, there is shown a work station comprising a frame 30 supporting a work surface P on which are arranged in a row in a horizontal direction X products 10 sensitive to air contamination, for example food products. Provision may be made for the work surface P to be formed by a conveyor belt capable of running said products 10 in the direction X.
Le personnel devant intervenir sur ces produits sensibles 10, se positionne de part et d'autre du bâti 30 et intervient sur les produits 10 par le dessus.The personnel having to intervene on these sensitive products 10, are positioned on either side of the frame 30 and intervene on the products 10 from above.
Sur le bâti 30, est monté un dispositif de protection rapprochée des produits 10.On the frame 30 is mounted a device for close protection of products 10.
Ce dispositif comporte un appareil d'insufflation 200 d'un gaz décontaminé comportant sur chaque côté longitudinal (dont un seul est ici visible) dudit plan de travail P, ici deux entrées 201 d'un gaz décontaminé par exemple de l'air stérile. Bien entendu, on peut prévoir selon des variantes non représentées, un nombre supérieur d'entrées de gaz décontaminé. Ces entrées 201 sont positionnées à distance l'une de l'autre sur chaque côté longitudinal dudit plan de travail P et débouchent dans une enceinte pourvue d'une sortie d'air stérile 202 se présentant sous la forme d'une fente s'étendant longitudinalement à ladite direction X sur toute la longueur du côté du plan de travail P. Les deux fentes de sortie 202 du dispositif d'insufflation sont situées au niveau du plan de travail P sur lequel sont disposées les produits 10 et sont disposées en regard l'une de l'autre. En outre, le dispositif représenté sur la figure 1 , comporte un appareil d'aspiration 100 du gaz décontaminé insufflé, comprenant une bouche d'aspiration 101 se présentant sous la forme d'une fente, s'étendant longitudinalement à la direction X de positionnement des produits 10, et positionnée au-dessus du plan de travail P, en regard desdits produits dans une région médiane du plan de travail située entre les deux fentes sorties 202 de l'appareil d'insufflation 200.This device comprises an insufflation apparatus 200 of a decontaminated gas comprising on each longitudinal side (only one of which is visible here) of said work plan P, here two inlets 201 of a decontaminated gas, for example sterile air. Of course, one can provide, according to variants not shown, a greater number of decontaminated gas inlets. These inlets 201 are positioned at a distance from each other on each longitudinal side of said work surface P and open into an enclosure provided with a sterile air outlet 202 in the form of a slot extending longitudinally to said direction X over the entire length of the side of the working plane P. The two outlet slots 202 of the blowing device are located at the level of the working plane P on which the products 10 are arranged and are arranged opposite l one of the other. In addition, the device shown in FIG. 1 comprises a suction device 100 for blown decontaminated gas, comprising a suction mouth 101 in the form of a slot, extending longitudinally to the positioning direction X of the products 10, and positioned above the work plane P, facing said products in a middle region of the work plane located between the two outgoing slots 202 of the insufflation apparatus 200.
L'appareil d'aspiration 100 comporte ici deux sorties d'air 102 situées au-dessus de la bouche d'aspiration 101 de sorte qu'elles permettent d'évacuer vers le haut le flux de gaz 102 aspiré. Ces deux sorties de gaz 102 sont positionnées à distance l'une de l'autre à proximité des bords d'extrémité de ladite bouche d'aspiration 101. Bien entendu, selon une variante non représentée, on peut prévoir un nombre supérieur de sorties de gaz.The suction device 100 here has two air outlets 102 located above the suction mouth 101 so that they allow the flow of aspirated gas 102 to be evacuated upwards. These two gas outlets 102 are positioned at a distance from each other near the end edges of said suction mouth 101. Of course, according to a variant not shown, a greater number of outlets can be provided. gas.
L'appareil d'aspiration 100 est monté solidaire de l'appareil d'insufflation 200 à l'aide de bras de soutien 1 10 de sorte qu'il est suspendu au-dessus du plan de travail P. Ici, il est prévu quatre bras de soutien 1 10 disposés par paires, chaque paire de bras de soutien 1 10 est positionnée de part et d'autre de la bouche d'aspiration 101 et est fixée d'une part à l'appareil d'aspiration 100 et d'autre part, à une enceinte du dispositif d'insufflation 200.The suction device 100 is mounted integral with the insufflation device 200 using support arms 1 10 so that it is suspended above the worktop P. Here, there are provided four support arms 1 10 arranged in pairs, each pair of support arms 1 10 is positioned on either side of the suction mouth 101 and is fixed on the one hand to the suction apparatus 100 and on the other hand, to an enclosure of the insufflation device 200.
Un tel dispositif fonctionne de la manière suivante.Such a device operates in the following manner.
Un flux d'air stérile rentre dans l'appareil d'insufflation 200 par les entrées 201 et est distribué sur les produits par les fentes de sortie 202 dudit appareil d'insufflation de sorte que l'air stérile sortant desdites fentes 202 suit un trajet A dirigé essentiellement parallèlement audit plan P, transversalement à ladite direction X. L'air stérile issu de ces fentes 202 lèche alors les produits 10 situés sur le plan de travail P. Simultanément, l'appareil d'aspiration 100 aspire par sa bouche d'aspiration 101 l'air stérile issu des fentes de sortie 202 de l'appareil d'insufflation. L'air issu des fentes de sortie 202 de l'appareil d'aspiration, est donc aspiré dans une région médiane du plan de travail P de sorte que le trajet A du flux d'air stérile est dévié vers le haut perpendiculairement audit plan de travail P sur lequel sont positionnés les produits 10. Deux veines principales d'air stérile 1, 2 sont issues desdites fentes de sortie 202. Ces deux veines 1, 2 sont dirigées l'une vers l'autre et se réunissent dans une région médiane du plan de travail pour former une veine d'écoulement dirigée vers le haut perpendiculairement audit plan de travail P en direction de la bouche d'aspiration 101.A sterile air flow enters the insufflation apparatus 200 through the inlets 201 and is distributed over the products through the outlet slots 202 of said insufflation apparatus so that the sterile air leaving said slots 202 follows a path A directed essentially parallel to said plane P, transverse to said direction X. The air sterile from these slots 202 then licks the products 10 located on the work surface P. Simultaneously, the suction device 100 sucks through its suction mouth 101 the sterile air coming from the outlet slots 202 of the device insufflation. The air from the outlet slots 202 of the suction device is therefore sucked into a middle region of the work plane P so that the path A of the sterile air flow is deflected upward perpendicular to said plane of work P on which the products are positioned 10. Two main veins of sterile air 1, 2 come from said outlet slots 202. These two veins 1, 2 are directed towards each other and meet in a median region from the work surface to form an upwardly directed flow stream perpendicular to said work plane P in the direction of the suction mouth 101.
Bien entendu, selon une variante non représentée du dispositif de la figure 1, on peut envisager d'éliminer l'appareil d'aspiration. Dans ce cas, les jets d'air stérile issus des fentes de sortie se rencontrent face à face, dans la région médiane du plan de travail, ce qui a pour effet de créer naturellement une veine centrale qui s'évacue selon une direction verticale perpendiculaire à ladite direction X vers le haut dudit plan en entraînant les particules contaminées.Of course, according to a variant not shown of the device of Figure 1, one can consider eliminating the suction device. In this case, the sterile air jets coming from the exit slots meet face to face, in the middle region of the work plan, which has the effect of naturally creating a central vein which evacuates in a vertical perpendicular direction to said direction X towards the top of said plane entraining the contaminated particles.
Sur la figure 3, on a représenté une autre variante de réalisation du dispositif de la figure 1.In FIG. 3, another alternative embodiment of the device in FIG. 1 is shown.
Selon cette variante, le dispositif d'insufflation 200 de gaz décontaminé est monté au-dessus du plan de travail P, et le dispositif d'aspiration est positionné sur le bâti 30, le long des côtés longitudinaux dudit plan de travail P, longitudinalement à la direction X de positionnement des produits 10.According to this variant, the blowing device 200 of decontaminated gas is mounted above the work plane P, and the suction device is positioned on the frame 30, along the longitudinal sides of said work plane P, longitudinally at product positioning direction X 10.
Le dispositif d'insufflation 200 est monté solidaire du dispositif d'aspiration 100 par l'intermédiaire du même système de bras de soutien 1 10 déjà décrit ci-dessus.The insufflation device 200 is mounted integral with the suction device 100 by means of the same support arm system 1 already described above.
Le dispositif d'insufflation 200 comporte une entrée de gaz 201 et une sortie de gaz décontaminé 202. Cette sortie de gaz stérile 202 se présente sous forme d'une fente s'étendant longitudinalement à la direction X au- dessus du plan P en regard desdits produits 10. Le dispositif d'aspiration 100 comporte deux bouches d'aspiration 101 sous la forme de deux fentesThe insufflation device 200 has a gas inlet 201 and a decontaminated gas outlet 202. This sterile gas outlet 202 is in the form of a slot extending longitudinally in the direction X above the plane P opposite said products 10. The suction device 100 has two suction ports 101 in the form of two slots
101 s'étendant sur les côtés longitudinaux dudit plan de travail P. Ces bouches d'aspiration 101 sont raccordées à des sorties d'air 102.101 extending on the longitudinal sides of said work plane P. These suction vents 101 are connected to air outlets 102.
Une telle variante fonctionne de la manière suivante. Le dispositif d'insufflation 200 produit par sa sortie 202 une veine de gaz décontaminé 3 en direction des produits 10 situés sur le plan P. Cette veine de gaz décontaminé 3 suit un trajet A dirigé perpendiculairement audit plan P. Lorsque cette veine de gaz décontaminé 3 arrive au contact dudit plan P, elle se sépare en deux veines d'écoulement 1 , 2 qui suivent des trajets A orientés essentiellement parallèlement audit plan P et transversalement à la direction X de positionnement desdits produits 10, dans des directions opposées de sorte que les veines d'écoulement d'air stérile lèchent les produits 10 positionnés sur le plan P. Ces veines d'écoulement de gaz décontaminé 1 , 2 sont aspirées par les bouches d'aspiration 101 de l'appareil d'aspiration 100 de soπe que le gaz s'évacue sur les côtés du plan de travail P.Such a variant works in the following manner. The insufflation device 200 produces, through its outlet 202, a vein of decontaminated gas 3 in the direction of the products 10 located on the plane P. This vein of decontaminated gas 3 follows a path A directed perpendicular to said plane P. When this vein of decontaminated gas 3 comes into contact with said plane P, it separates into two flow streams 1, 2 which follow paths A oriented essentially parallel to said plane P and transversely to the direction X of positioning of said products 10, in opposite directions so that the sterile air flow streams lick the products 10 positioned on the plane P. These decontaminated gas flow streams 1, 2 are sucked in by the suction outlets 101 of the suction apparatus 100 so that the gas is evacuated on the sides of the worktop P.
Ici aussi, on peut bien entendu envisager une variante non représentée du dispositif de la figure 3, ne comportant pas l'appareil d'aspiration. Dans ce cas, les deux veines d'écoulement parallèles au plan de travail s'évacuent naturellement sur les bords du plan P.Here too, it is of course possible to envisage a variant, not shown, of the device of FIG. 3, not comprising the suction device. In this case, the two flow veins parallel to the work plane naturally evacuate on the edges of the plane P.
Sur la figure 2, on a représenté en coupe verticale, une vue de détail de l'intérieur d'un mode de réalisation d'une partie d'un appareil d 'insufflation faisant partie d'un dispositif de protection anti¬ microbienne selon l'invention. Ce mode de réalisation de l 'appareil d'insufflation est une variante de celui représenté sur la figure 1In Figure 2, there is shown in vertical section, a detail view of the interior of an embodiment of part of a blowing device forming part of an anti¬ microbial protection device according to l 'invention. This embodiment of the insufflation apparatus is a variant of that shown in Figure 1
En référence à cette figure 2, l'appareil d'insufflation comporte sur chaque côté du plan de travail P une entrée de gaz 201 positionnée sur les côtés du plan P en-dessous dudit plan P de sorte que le gaz entrant dans ledit appareil est transporté selon un trajet vertical vers la haut en direction d'une sortie sous forme de fente 202 située au niveau dudit plan P. Cet appareil d'insufflation 200 comporte dans un boîtier qui s'étend v erticalement sur le côté du bâti 30, entre l'entrée 201 et la sortie 202, un filtre à graisses 21 1 qui s'étend horizontalement sur toute la largeur du boîtier, par rapport à la direction verticale F d'entrée du flux de gaz dans ledit dispositif d'insufflation, puis successivement un pré-filtre 212 qui s'étend également sur toute la largeur du boîtier, un ventilateur 213 qui permet de transporter le gaz filtré vers la partie supérieure du dispositif d'insufflation 200. Ce ventilateur 213 est positionné dans un trajet en chicane 214 formé par des déflecteurs 214a du flux de gaz de sorte qu'à la sortie de ce trajet en chicane le flux de gaz filtré s'écoule selon la direction F verticale dirigée vers le haut du dispositif d'insufflation 200. Au-dessus du trajet en chicane 214 est disposée en parallèle une paire de filtres absolus 215 dont l'efficacité est avantageusement égale ou supérieure à celle d'un filtre très haute efficacité (filtre normalisé). Ces filtres 215 s'étendent selon ladite direction verticale F. Au-dessus des filtres absolus 215 est positionnée selon une direction horizontale une grille anti-turbulences de façon à réduire le taux de turbulence de l'écoulement d'air stérile qui débouche dans une enceinte 217 présentant un trajet coudé, et convergent dans le but de réduire encore le taux de turbulence, amenant le flux de gaz décontaminé jusqu'à la sortie en forme de fente 202 dirigé selon une direction sensiblement tranversale à la direction X.With reference to this FIG. 2, the insufflation apparatus comprises on each side of the work plane P a gas inlet 201 positioned on the sides of the plane P below said plane P so that the gas entering said apparatus is transported along a vertical path upwards in the direction of an outlet in the form of a slot 202 situated at the level of said plane P. This blowing device 200 comprises in a housing which extends vertically on the side of the frame 30, between inlet 201 and outlet 202, a grease filter 21 1 which extends horizontally over the entire width of the housing, relative to the vertical direction F of entry of the gas flow into said insufflation device, then successively a pre-filter 212 which also extends over the entire width of the housing, a fan 213 which makes it possible to transport the filtered gas to the upper part of the device 200. This fan 213 is positioned in a baffle path 214 formed by deflectors 214a of the gas flow so that at the exit of this baffle path the flow of filtered gas flows in the vertical direction F directed upwards of the insufflation device 200. Above the baffle path 214 is arranged in parallel a pair of absolute filters 215 whose efficiency is advantageously equal to or greater than that of a very high efficiency filter (standardized filter ). These filters 215 extend in said vertical direction F. Above the absolute filters 215 is positioned in a horizontal direction an anti-turbulence grid so as to reduce the turbulence rate of the sterile air flow which opens into a enclosure 217 having an angled path, and converging in order to further reduce the turbulence rate, bringing the flow of decontaminated gas to the slot-shaped outlet 202 directed in a direction substantially transverse to the direction X.
Il est en effet avantageux de réduire la vitesse de diffusion turbulente (dirigée perpendiculairement à la direction de l'écoulement) des particules contaminées entraînées par le flux de gaz afin d'éviter qu'elles n'atteignent les produits. Cette vitesse de diffusion turbulente étant fortement liée au taux de turbulence, et à la taille des tourbillons présents dans le flux, la réduction de la vitesse de diffusion passe par la réduction du taux de turbulence.It is indeed advantageous to reduce the turbulent diffusion speed (directed perpendicular to the direction of flow) of the contaminated particles entrained by the gas flow in order to prevent them from reaching the products. This turbulent diffusion speed being strongly linked to the turbulence rate, and to the size of the vortices present in the flow, the reduction of the diffusion speed goes through the reduction of the turbulence rate.
Sur la figure 4, on a représenté schématiquement un poste de travail P sur lequel sont disposés en file selon une direction horizontale X des produits 10 sensibles à l'aérocontamination. Le plan de travail n'est pas relié de façon étanche au reste du bâti 30. De ce fait, il peut se produire une induction d'air contaminé par l'espace laissé libre entre le plan de travail et le bâti.In Figure 4, there is shown schematically a workstation P on which are arranged in a line in a horizontal direction X products 10 sensitive to air contamination. The work surface is not tightly connected to the rest of the frame 30. As a result, there may be an induction of contaminated air by the space left free between the work surface and the frame.
Deux sorties supplémentaires d'air stérile 203 sont prévues se présentant sous la forme d'une fente s'étendant longitudinalement à ladite direction X sur toute la longueur au niveau des bords et sous le plan de travail P. Une sortie d'air 202 identique à celle décrite à la figure 1 et à la figure 2 est également prévue.Two additional sterile air outlets 203 are provided in the form of a slot extending longitudinally in said direction X over the entire length at the edges and under the worktop P. An identical air outlet 202 to that described in Figure 1 and Figure 2 is also provided.
La veine de gaz 204 est distribuée de part et d'autre du plan de travail selon un trajet contournant les bords dudit plan puis balayant la face inférieure dudit plan jusqu'à la ligne médiane longitudinale dudit plan où les veines de gaz se rej oignant se dirigent selon une direction perpendiculaire audit plan.The gas stream 204 is distributed on either side of the work plane along a path bypassing the edges of said plane then sweeping the underside of said plane to the longitudinal center line of said plane where the gas veins meet direct in one direction perpendicular to said plane.
Sur la figure 5 qui comporte le même poste de travail P non relié au bâti 30 comme sur la figure 4, un profilé en U 205 fixé sous le bâti forme un conduit amenant sous le poste de travail P un courant d'air stérile en légère surpression empêchant toute induction d'air contaminé par les espaces laissés libres du fait de l'absence d'étanchéite entre le bâti et le plan de travail.In FIG. 5 which includes the same work station P not connected to the frame 30 as in FIG. 4, a U-shaped profile 205 fixed under the frame forms a duct bringing under the work station P a stream of lightly sterile air. overpressure preventing any induction of air contaminated by the spaces left free due to the lack of sealing between the frame and the worktop.
Sur la figure 6, le dispositif comporte un tapis de convoyage P dont la chaîne de traction (non représentée) créé un manque d'étanchéite avec le bâti 30. Les sorties 202 sont pourvues dans la zone inférieure d'un coude 206 créant un conduit 207 déviant une partie du flux d'air stérile vers les bords du tapis de convoyage empêchant de ce fait toute induction d'air contaminé.In FIG. 6, the device comprises a conveyor belt P whose traction chain (not shown) creates a lack of tightness with the frame 30. The outlets 202 are provided in the lower zone with an elbow 206 creating a conduit 207 diverting part of the sterile air flow towards the edges of the conveyor belt thereby preventing any induction of contaminated air.
Bien entendu, la présente invention n'est nullement limitée aux modes de réalisation décrits et représentés, mais l'homme du métier saura y apporter toute variante conforme à son esprit. Of course, the present invention is not limited to the embodiments described and shown, but those skilled in the art will be able to make any variant according to his spirit.

Claims

REVENDICATIONS
1. Procédé de protection rapprochée de produits ( 10) sensibles à la contamination par des agents contaminants véhiculés par l'ambiance, caractérisé en ce que ces produits ( 10) étant placés sur un plan de travail (P), on dirige de part et d'autre desdits produits ( 10) au moins une veine de gaz décontaminé ( 1 , 2) sensiblement parallèlement audit plan de travail (P) vers lesdits produits ( 10), chaque veine de gaz (3) s'évacuant du plan de travail (P) à partir d'une région médiane située entre les bords du plan de travail (P) selon une direction sensiblement perpendiculaire audit plan de travail (P), ou réciproquement on dirige au moins une veine de gaz (3) au-dessus du plan de travail (P), dans une région médiane dudit plan de travail (P) située entre les bords de ce dernier, selon une direction sensiblement perpendiculaire audit plan de travail (P) vers lesdits produits ( 10), chaque veine de gaz ( 1 , 2) s'évacuant du plan de travail (P) selon une direction sensiblement parallèlement audit plan de travail (P) de part et d'autre desdits produits ( 10).1. A method of close protection of products (10) sensitive to contamination by contaminating agents conveyed by the atmosphere, characterized in that these products (10) being placed on a work surface (P), it is directed by hand and on the other side of said products (10) at least one stream of decontaminated gas (1, 2) substantially parallel to said work plane (P) towards said products (10), each gas stream (3) discharging from the work plane (P) from a median region located between the edges of the work plane (P) in a direction substantially perpendicular to said work plane (P), or vice versa at least one gas stream (3) is directed above from the work plane (P), in a middle region of said work plane (P) situated between the edges of the latter, in a direction substantially perpendicular to said work plane (P) towards said products (10), each gas stream (1, 2) leaving the work plane (P) in a direction substantially parallel to said work plan (P) on either side of said products (10).
2. Procédé selon la revendication 1 , caractérisé en ce que les produits étant disposés selon une direction horizontale X, on dirige de part et d'autre de ladite direction X, selon une direction Y sensiblement transversale à ladite direction X, deux veines de gaz décontaminé ( 1 , 2) vers lesdits produits ( 10) et lesdites veines de gaz (3) s'évacuant selon une direction verticale Z sensiblement perpendiculaire à ladite direction X, ou réciproquement on dirige une veine de gaz décontaminé (3 ) en direction desdits produits ( 10) selon la direction verticale Z sensiblement perpendiculaire à ladite direction X, ladite veine de gaz ( 1 , 2) s'évacuant selon la direction Y sensiblement transversale à ladite direction X, de part et d'autre de ladite direction X. 2. Method according to claim 1, characterized in that the products being arranged in a horizontal direction X, we direct on either side of said direction X, in a direction Y substantially transverse to said direction X, two gas streams decontaminated (1, 2) to said products (10) and said gas streams (3) discharging in a vertical direction Z substantially perpendicular to said direction X, or conversely a stream of decontaminated gas (3) is directed towards said products (10) in the vertical direction Z substantially perpendicular to said direction X, said gas stream (1, 2) discharging in direction Y substantially transverse to said direction X, on either side of said direction X.
3. Procédé selon l'une des revendications 1 ou 2, caractérisé en ce qu'on aspire chaque veine de gaz (3) au-dessus desdits produits ( 10), ou réciproquement on aspire chaque veine de gaz ( 1 , 2) de part et d'autre desdits produits ( 10).3. Method according to one of claims 1 or 2, characterized in that each gas stream is sucked (3) above said products (10), or vice versa each gas stream is sucked (1, 2) from on either side of said products (10).
4. Procédé selon l'une des revendications 2 ou 3, caractérisé en ce que les produits ( 10) étant alignés sur un tapis de convoyage (P) qui défile selon la direction X, on dirige à partir des bords longitudinaux dudit tapis, deux veines de gaz décontaminé ( 1 , 2 ) vers le milieu dudit tapis de convoyage (P), et on aspire une veine de gaz (3) dans le plan de symétrie dudit tapis (P), ou réciproquement on dirige dans le plan de symétrie dudit tapis de convoyage (P) une veine de gaz décontaminé (3) vers ledit tapis de convoyage (P) et on aspire vers les bords longitudinaux dudit tapis de convoyage (P) les veines de gaz ( 1, 2).4. Method according to one of claims 2 or 3, characterized in that the products (10) being aligned on a conveyor belt (P) which travels in the direction X, we direct from the longitudinal edges of said belt, two veins of decontaminated gas (1, 2) towards the middle of said mat conveying (P), and a gas stream (3) is sucked into the plane of symmetry of said conveyor (P), or vice versa, a decontaminated gas stream (3) is directed into the plane of symmetry of said conveyor belt (P) towards said conveyor belt (P) and the gas streams (1, 2) are drawn towards the longitudinal edges of said conveyor belt (P).
5. Procédé selon la revendication 4, caractérisé en ce que lorsque le plan de travail P ou tapis de convoyage n'est pas relié de façon étanche au bâti (30), une veine de gaz décontaminé supplémentaire (204) est dirigée sur les côtés et sous le plan de travail de façon à ce que le plan de travail soit enveloppé par les veines de gaz ( 1,2) situées au-dessus du plan de travail et par la veine de gaz supplémentaire (204).5. Method according to claim 4, characterized in that when the work surface P or conveyor belt is not tightly connected to the frame (30), an additional decontaminated gas stream (204) is directed on the sides and under the work plan so that the work plan is enveloped by the gas streams (1,2) located above the work plan and by the additional gas stream (204).
6. Procédé selon la revendication 5, caractérisé en ce que lorsqu'un défaut d'étanchéite est crée entre le bâti et le tapis de convoyage par la chaîne de traction dudit tapis, l'induction d'air contaminé est bloquée en déviant une partie de chaque veine de gaz décontaminé ( 1 , 2) vers les bords dudit tapis.6. Method according to claim 5, characterized in that when a sealing defect is created between the frame and the conveyor belt by the traction chain of said belt, the induction of contaminated air is blocked by deflecting a part from each vein of decontaminated gas (1, 2) towards the edges of said mat.
7. Dispositif de protection rapprochée de produits ( 10) sensibles à la contamination par des agents contaminants véhiculés par l'ambiance, les produits ( 10) étant positionnés sur un plan de travail (P), caractérisé en ce qu'il comporte des moyens d'insufflation (200) aptes à produire de part et d'autre desdits pr duits ( 10) au moins une veine de gaz décontaminé ( 1 , 2) en direction des produits ( 10), chaque veine de gaz décontaminé ( 1 , 2) suivant un trajet tout d'abord orienté sensiblement parallèlement audit plan de travail (P) de sorte que chaque veine de gaz décontaminé ( 1 , 2 ) lèche lesdits produits ( 10), puis dirigé à partir d'une région médiane du plan de travail (P) située entre les bords de ce dernier, sensiblement perpendiculairement audit plan de travail ( P), ou réciproquement dirigé dans une région médiane du plan de travail (P) située entre les bords de ce dernier, sensiblement perpendiculairement audit plan de travail (P) vers lesdits produits ( 10), puis orienté sensiblement parallèlement audit plan de travail (P) de part et d'autre desdits produits ( 10).7. Close protection device for products (10) sensitive to contamination by contaminating agents conveyed by the atmosphere, the products (10) being positioned on a work surface (P), characterized in that it comprises means insufflation (200) capable of producing on either side of said products (10) at least one stream of decontaminated gas (1, 2) in the direction of the products (10), each stream of decontaminated gas (1, 2 ) along a path first oriented substantially parallel to said work plane (P) so that each stream of decontaminated gas (1, 2) licks said products (10), then directed from a middle region of the plane of work (P) located between the edges of the latter, substantially perpendicular to said work plane (P), or vice versa directed in a middle region of the work plane (P) located between the edges of the latter, substantially perpendicular to said work plane (P) to said products (10), then oriented substantially parallel to said work plan (P) on either side of said products (10).
8. Dispositif de protection selon la revendication 7, caratérisé en ce qu'il comporte des moyens d'aspiration ( 100).8. Protective device according to claim 7, characterized in that it comprises suction means (100).
9. Dispositif de protection selon la revendication 8, caractérisé en ce que les moyens d'insufflation ( 200) (respectivement les moyens d'aspiration ( 100)), sont montés solidaire des moyens d'aspiration d'air ( 100) (respectivement des moyens d'insufflation (200) ). 9. Protective device according to claim 8, characterized in that the insufflation means (200) (respectively the suction means (100)), are mounted integral with the air suction means (100) (respectively insufflation means (200)).
10. Dispositif de protection selon l'une des revendications 7 à 9 , caractérisé en ce que les produits (10) étant disposés selon une direction X, les moyens d'insufflation (200) sont aptes à insuffler de part et d'autre de ladite direction X de positionnement des produits ( 10), deux veines de gaz décontaminé ( 1 , 2) dirigées l'une vers l'autre selon une direction Y transversale à ladite direction X.10. Protective device according to one of claims 7 to 9, characterized in that the products (10) being arranged in a direction X, the blowing means (200) are capable of blowing on either side of said product positioning direction X (10), two streams of decontaminated gas (1, 2) directed towards one another in a direction Y transverse to said direction X.
11. Dispositif de protection selon la revendication 10, caractérisé en ce que les moyens d'insufflation (200) comprennent au moins une entrée de gaz (201) et au moins deux sorties de gaz décontaminé (202) en regard l'une de l'autre, chaque sortie de gaz (202) se présentant sous la forme d'une fente positionnée sur un côté du plan de travail (P) et s'étendant longitudinalement à la direction X de positionnement des produits ( 10).11. Protective device according to claim 10, characterized in that the blowing means (200) comprise at least one gas inlet (201) and at least two decontaminated gas outlets (202) opposite one of the Another, each gas outlet (202) being in the form of a slot positioned on one side of the work surface (P) and extending longitudinally to the direction X of positioning of the products (10).
12. Dispositif de protection selon l'une des revendications 10 ou 1 1 , caratérisé en ce qu'il comporte des moyens d'aspiration ( 100) aptes à aspirer au-dessus du plan de travail (P) de positionnement des produits ( 10) les deux veines de gaz ( 1 , 2) réunies en une veine commune (3 ) dirigée selon une direction Z perpendiculaire audit plan (P).12. Protective device according to one of claims 10 or 1 1, characterized in that it comprises suction means (100) capable of sucking above the work surface (P) for positioning the products (10 ) the two gas streams (1, 2) united in a common stream (3) directed in a direction Z perpendicular to said plane (P).
13. Dispositif de protection selon la revendication 12, caractérisé en ce que les moyens d'aspiration ( 100) comprennent une bouche d'aspiration (201 ) disposée au-dessus du plan (P) en regard desdits produits ( 10), dans une région médiane entre les deux sorties de gaz décontaminé (202) des moyens d'insufflation (200).13. Protective device according to claim 12, characterized in that the suction means (100) comprise a suction mouth (201) disposed above the plane (P) opposite said products (10), in a middle region between the two decontaminated gas outlets (202) of the insufflation means (200).
14. Dispositif de protection selon l'une des revendications 7 à 9, caractérisé en ce que les produits ( 10) étant disposés selon une direction X, les moyens d'insufflation (200) sont aptes à insuffler au-dessus du plan de travail (P) de positionnement des produits ( 10) une veine de gaz décontaminé (3) en direction des produits ( 10).14. Protective device according to one of claims 7 to 9, characterized in that the products (10) being arranged in a direction X, the blowing means (200) are capable of blowing above the work surface (P) for positioning the products (10) a stream of decontaminated gas (3) in the direction of the products (10).
15. Dispositif de protection selon la revendication 14, caractérisé en ce que les moyens d'insufflation (200) comprennent une entrée (201 ), et une sortie (202) de gaz décontaminé positionnée en regard des produits ( 10) au-dessus dudit plan de travail (P) dans une région médiane dudit plan de travail (P).15. Protective device according to claim 14, characterized in that the blowing means (200) comprise an inlet (201), and an outlet (202) of decontaminated gas positioned opposite the products (10) above said work plane (P) in a middle region of said work plane (P).
16. Dispositif de protection selon l'une des revendications 14 ou 15, caractérisé en ce qu'il comporte des moyens d'aspiration ( 100) aptes à aspirer de part et d'autre de ladite direction X de positionnement des produits ( 10), la veine de gaz ( 3) séparée en deux veines de gaz ( 1 , 2 ) dirigées transversalement à ladite direction X dans des directions opposées. 16. Protective device according to one of claims 14 or 15, characterized in that it comprises suction means (100) capable of sucking on either side of said product positioning direction X (10) , the gas stream (3) separated into two gas streams (1, 2) directed transversely to said direction X in opposite directions.
17. Dispositif de protection selon la revendication 16, caractérisé en ce que les moyens d'aspiration ( 100) comportent deux bouches d'aspiration ( 101 ) disposées en regard l'une de l'autre, chaque bouche d'aspiration ( 101 ) se présentant sous la forme d'une fente positionnée sur un côté du plan de travail (P) et s'étendant longitudinalement à ladite direction X.17. Protective device according to claim 16, characterized in that the suction means (100) comprise two suction mouths (101) arranged opposite one another, each suction mouth (101) in the form of a slot positioned on one side of the work surface (P) and extending longitudinally to said direction X.
18. Dispositif de protection selon l'une des revendications 1 1 ou 15, caractérisé en ce que les moyens d'insufflation (200) comportent successivement entre chaque entrée (201 ) et chaque sortie (202) de gaz décontaminé , au moins des moyens de filtrage de l'air (21 1, 212, 215), des moyens de transport (213) du gaz de l'entrée (201 ) vers la sortie (202).18. Protection device according to one of claims 1 1 or 15, characterized in that the blowing means (200) successively comprise between each inlet (201) and each outlet (202) of decontaminated gas, at least means filtering the air (21 1, 212, 215), the means of transport (213) of the gas from the inlet (201) to the outlet (202).
19. Dispositif de protection selon la revendication 18, caractérisé en ce que les moyens d'insufflation (200) comportent en outre des moyens anti-turbulences (2 16) placés à proximité de ladite sortie de gaz décontaminé (202).19. Protective device according to claim 18, characterized in that the blowing means (200) further comprise anti-turbulence means (2 16) placed near said outlet of decontaminated gas (202).
20. Dispositif de protection selon l'une des revendications 18 ou 1 , caractérisé en ce que les moyens de filtrage de l'air comprennent au moins un filtre (215) dont l'efficacité est égale ou supérieure à celle d'un filtre très haute efficacité, et en ce que les moyens de transport comprennent un ventilateur (213).20. Protective device according to one of claims 18 or 1, characterized in that the air filtering means comprise at least one filter (215) whose efficiency is equal to or greater than that of a very high efficiency, and in that the means of transport comprises a fan (213).
21. Dispositif de protection selon la revendication 7, caractérisé en ce que le dispositif comporte des moyens d'insufflation supplémentaires comprenant au moins une entrée de gaz qui peut être celle des moyens d'insufflation principaux et au moins deux sorties de gaz décontaminc (203 ) en regard l'une de l'autre, chaque sortie de gaz se présentant sous la forme d'une fente positionnée au bord et sous le plan de travail et s'étendant longitudinalement à la direction X de positionnement des produits, les veines de gaz s'évacuant selon le plan de sy métrie perpendiculaire au plan de travail. 21. Protective device according to claim 7, characterized in that the device comprises additional blowing means comprising at least one gas inlet which can be that of the main blowing means and at least two decontaminated gas outlets (203 ) facing each other, each gas outlet being in the form of a slot positioned at the edge and under the work surface and extending longitudinally to the direction X of positioning of the products, the veins of gases evacuated according to the plane of symmetry perpendicular to the work plane.
22. Dispositif de protection selon la revendication 7, caractérisé en ce que le dispositif comporte un conduit inférieur ( 205) permettant de faire circuler une veine de gaz le long de la face inférieure ainsi que le long des bords du plan de travail.22. Protective device according to claim 7, characterized in that the device comprises a lower conduit (205) making it possible to circulate a stream of gas along the lower face as well as along the edges of the work surface.
23. Dispositif de protection selon la revendication 7, caractérisé en ce que lorsque la chaîne du tapis de convoyage crée un manque d'étanchéite permettant l'induction d'air contaminé, les moyens d'insufflation comprennent au moins une entrée de gaz ( 201 ) et au moins deux sorties de gaz (202), décontaminé en regard l'une de l'autre, chaque sortie de gaz (202) se présentant sous la forme d'une fente positionnée sur un côté du plan de travail et s'étendant longitudinalement à la direction X de positionnement des produits et sont pourvus d'un moyen aérodynamique (206) assurant la déviation d'une partie de la veine de gaz décontaminé le long des bords dudit tapis de convoyage dans une direction perpendiculaire au plan de celui-ci.23. Protective device according to claim 7, characterized in that when the chain of the conveyor belt creates a lack of tightness allowing the induction of contaminated air, the insufflation means comprise at least one gas inlet (201 ) and at least two outputs from gas (202), decontaminated opposite one another, each gas outlet (202) being in the form of a slot positioned on one side of the work surface and extending longitudinally in the direction X of positioning of the products and are provided with an aerodynamic means (206) ensuring the deflection of a part of the stream of decontaminated gas along the edges of said conveyor belt in a direction perpendicular to the plane thereof.
24. Dispositif de protection selon la revendication 23, caractérisé en ce que le moyen aérodynamique est un coude (206) situé dans la zone inférieure des sorties (202) de gaz déviant une partie du flux d'air stérile vers les bords du tapis de convoyage. 24. Protective device according to claim 23, characterized in that the aerodynamic means is an elbow (206) located in the lower zone of the gas outlets (202) diverting part of the sterile air flow towards the edges of the mat. conveying.
EP96913582A 1995-04-14 1996-04-12 Close contamination protection device Expired - Lifetime EP0830549B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9504526 1995-04-14
FR9504526A FR2733036B1 (en) 1995-04-14 1995-04-14 CLOSE-UP ANTI-CONTAMINATION PROTECTION DEVICE
PCT/FR1996/000563 WO1996032613A1 (en) 1995-04-14 1996-04-12 Close contamination protection device

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EP0830549A1 true EP0830549A1 (en) 1998-03-25
EP0830549B1 EP0830549B1 (en) 2002-06-26

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JP (1) JP4113256B2 (en)
AT (1) ATE219831T1 (en)
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JP4113256B2 (en) 2008-07-09
ES2176454T3 (en) 2002-12-01
FR2733036B1 (en) 1997-07-04
DE69622037D1 (en) 2002-08-01
FR2733036A1 (en) 1996-10-18
ATE219831T1 (en) 2002-07-15
JPH11503815A (en) 1999-03-30
WO1996032613A1 (en) 1996-10-17
CA2218416C (en) 2008-07-08
EP0830549B1 (en) 2002-06-26
CA2218416A1 (en) 1996-10-17
US6035549A (en) 2000-03-14
DE69622037T2 (en) 2002-11-21

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