EP0830549B1 - Dispositif de protection anti-contamination rapprochee - Google Patents

Dispositif de protection anti-contamination rapprochee Download PDF

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Publication number
EP0830549B1
EP0830549B1 EP96913582A EP96913582A EP0830549B1 EP 0830549 B1 EP0830549 B1 EP 0830549B1 EP 96913582 A EP96913582 A EP 96913582A EP 96913582 A EP96913582 A EP 96913582A EP 0830549 B1 EP0830549 B1 EP 0830549B1
Authority
EP
European Patent Office
Prior art keywords
work surface
gas
products
decontaminated
stream
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.)
Expired - Lifetime
Application number
EP96913582A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0830549A1 (fr
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
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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/fr
Application granted granted Critical
Publication of EP0830549B1 publication Critical patent/EP0830549B1/fr
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 generally to the protection close to a work station located in a contaminated atmosphere, and more particularly a process and a device for close protection of products sensitive to contamination by contaminating agents 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 air circulating in these clean rooms is often regulated at a low temperature.
  • Document FR-A-2 485 700 teaches a process (and associated device) for close protection of the workstation against contamination carried by the atmosphere, according to which we create a single vertical flow descending towards products, this flow on the one hand having dimensions equal to or greater than those the workstation to be protected so as to completely cover it with sterile air, and on the other hand evacuating the work plan on a single rear side thereof.
  • the invention proposes a new protection method close-up of products sensitive to air contamination by contaminating agents conveyed by the atmosphere, in accordance with the characteristics of claim 1.
  • the invention also provides a method according to claim 2.
  • the products positioned on the worktop are isolated from the environment contaminated by a flow of decontaminated gas which covers them, and which either flows vertically down towards the worktop and then transversely to the edges of said plane, ie from the edges of said work plane transversely to said products, then vertically upwards from said workplan.
  • Contamination brought by personnel working on products sensitive positioned on the work surface is then automatically driven by the flow of decontaminated gas along either path, towards the outside of said path work plan without this contamination reaching said products.
  • One embodiment of the method conforms to the characteristics of the claim 3.
  • each gas stream is sucked above said products or conversely, each gas stream is sucked on either side of said products.
  • the products being aligned on a conveyor belt which runs according to direction X we direct from the longitudinal edges of said mat, two veins of decontaminated gas towards the middle of said conveyor belt and said veins are aspirated gas in the plane of symmetry of said mat, or vice versa we direct in the plane symmetry of the conveyor belt, a stream of decontaminated gas towards the belt and sucks towards the longitudinal edges of said conveyor belt the gas streams decontaminated.
  • the method according to the invention can be improved to adapt it to the work or conveyor belt which are not tightly connected to the frame.
  • the process according to the invention consists in blocking induction by deflecting part of each vein of decontaminated gas substantially parallel to the work plan, previously described, toward the edges of said mat.
  • the invention also provides a close protection device according to claim 8 and a device according to claim 9.
  • the insufflation means comprise at least one inlet for gas and at least two decontaminated gas outlets facing each other, each gas outlet in the form of a slot positioned on one side of the plane and extending longitudinally to the direction X of positioning of the products.
  • suction means comprise a mouth suction placed above the work surface next to said products, in a middle region located between the two decontaminated gas outlets of the appliance insufflation.
  • the insufflation means comprise a gas inlet, and a decontaminated gas outlet positioned opposite the products above the plane of work in a middle region of said work plan.
  • suction means comprise two suction ports arranged opposite one another, each suction port 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 work.
  • the device comprises means additional insufflation including at least one gas inlet which can be that of the main insufflation means and at least two gas outlets decontaminated opposite each other, each gas outlet being under the form of a slot positioned at the edge and under the worktop and extending longitudinally to the product positioning direction X.
  • the gas veins evacuating according to the plane of symmetry perpendicular to the work plane.
  • the device comprises a lower duct allowing a vein of gas to circulate along the underside as well as the along the edges of the work surface or conveyor belt.
  • the insufflation means comprise at least one gas inlet and at minus two decontaminated gas outlets opposite each other, each outlet gas in the form of a slot positioned on one side of the worktop and extending longitudinally to the product positioning direction X and are provided with an aerodynamic means ensuring the deflection of part of the vein of decontaminated gas along the edges of said conveyor belt in a direction perpendicular to the plane thereof.
  • a work station comprising a frame 30 supporting a work plan P on which are arranged in file in a direction horizontal X of products 10 sensitive to air contamination, for example foodstuffs.
  • the work plan P is formed by a mat conveyor capable of scrolling said products 10 in the direction X.
  • This device includes an insufflation apparatus 200 for a decontaminated gas comprising on each longitudinal side (only one of which is visible here) of said plane of work P, here two inputs 201 of a decontaminated gas, for example sterile air.
  • a decontaminated gas for example sterile air.
  • These inputs 201 are positioned remotely from each other on each longitudinal side of said work plan P and open out in an enclosure provided with a sterile air outlet 202 in the form a slot extending longitudinally to said direction X over the entire length of the side of the worktop P.
  • the two outlet slots 202 of the insufflation device are located at the level of the work plan P on which the products 10 and are arranged opposite each other.
  • the device shown in Figure 1 includes an apparatus suction 100 of the blown decontaminated gas, comprising a suction mouth 101 in the form of a slot, extending longitudinally at the product positioning direction X, and positioned above the plane of work P, opposite said products in a middle region of the work plan located between the two outlet slots 202 of the insufflation apparatus 200.
  • the suction device 100 here has two air outlets 102 located above from the suction mouth 101 so that they allow evacuation towards the high the gas flow 102 aspirated. These two gas outlets 102 are positioned at distance from each other near the end edges of said mouth suction 101. Of course, according to a variant not shown, one can provide more gas outlets.
  • the suction device 100 is mounted integral with the insufflation device 200 using support arms 110 so that it hangs above the plane of work P.
  • support arms 110 there are four support arms 110 arranged in pairs, each pair support arm 110 is positioned on either side of the suction mouth 101 and is fixed on the one hand to the suction device 100 and on the other hand, to an enclosure insufflation device 200.
  • Such a device operates in the following manner.
  • a sterile air flow enters the blowing device 200 through the inlets 201 and is distributed on the products through the outlet slots 202 of said device insufflation so that the sterile air leaving said slots 202 follows a path A directed essentially parallel to said plane P, transversely to said direction X.
  • the sterile air coming from these slots 202 then licks the products 10 located on the plane of work P.
  • the suction device 100 sucks in through its mouth suction 101 sterile air from the outlet slots 202 of the insufflation apparatus.
  • 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 work plane P on which are positioned products 10.
  • Two main veins of sterile air 1, 2 come out said outlet slots 202. These two veins 1, 2 are directed towards each other and meet in a middle region of the work plane to form a vein upwardly directed flow perpendicular to said work plane P in direction of the suction mouth 101.
  • the sterile air jets from the exit slots meet face to face, in the middle region of the plane of work, which has the effect of naturally creating a central vein which evacuates in a vertical direction perpendicular to said direction X upwards from said plan by entraining contaminated particles.
  • the insufflation device 200 of decontaminated gas is mounted above the worktop P, and the suction device is positioned on the frame 30, along the longitudinal sides of said work plane P, longitudinally at the product positioning direction X 10.
  • the insufflation device 200 is mounted integral with the suction device 100 via the same support arm system 110 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 a slit extending longitudinally in the direction X above the plane P in look of said products 10.
  • the suction device 100 has two mouths suction 101 in the form of two slots 101 extending on the sides longitudinal of said work plan P. These suction outlets 101 are connected to air outlets 102.
  • the insufflation device 200 produces, through its outlet 202, a gas stream decontaminated 3 towards products 10 located on plane P.
  • This gas stream decontaminated 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 in two flow veins 1, 2 which follow paths A essentially oriented parallel to said plane P and transversely to the positioning direction X of said products 10, in opposite directions so that the veins of sterile air flow lick the products 10 positioned on the plane P.
  • These decontaminated gas flow streams 1, 2 are drawn in through the vents 101 of the suction device 100 so that the gas is evacuated on the sides of worktop P.
  • FIG 2 there is shown in vertical section, a detailed view of inside an embodiment of part of an insufflation apparatus making part of an anti-microbial protection device according to the invention.
  • This mode of embodiment of the insufflation device is a variant of that shown on the figure 1
  • the insufflation apparatus comprises on each side of work plan P a gas inlet 201 positioned on the sides of plan P below of said plane P so that the gas entering said apparatus is transported in a vertical upward path toward a slit exit 202 located at the level of said plane P.
  • This insufflation apparatus 200 comprises in a housing which extends vertically on the side of the frame 30, between the inlet 201 and the outlet 202, a grease filter 211 which extends horizontally over the entire width of the box, 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 allows the gas to be transported filtered towards the upper part of the insufflation device 200.
  • This fan 213 is positioned in a baffle path 214 formed by deflectors 214a of the flow of gas so that at the end of this baffled path the flow of filtered gas flows according to the vertical direction F directed upwards from the blower 200.
  • baffle path 214 Above of the baffle path 214 is arranged in parallel a pair of absolute filters 215 of which the efficiency is advantageously equal to or greater than that of a very high filter efficiency (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 flow sterile air which opens into an enclosure 217 having an angled path, and converge in order to further reduce the turbulence rate, bringing the flow of decontaminated gas to the slit-shaped outlet 202 directed in one direction substantially transverse to direction X.
  • an anti-turbulence grid so as to reduce the turbulence rate of the flow sterile air which opens into an enclosure 217 having an angled path, and converge in order to further reduce the turbulence rate, bringing the flow of decontaminated gas to the slit-shaped outlet 202 directed in one direction substantially transverse to direction X.
  • This turbulent diffusion speed is strongly linked to the rate of turbulence, and the size of the vortices present in the flow, reducing the diffusion speed involves reducing the turbulence rate.
  • a workstation P is schematically represented on which are arranged in a file in a horizontal direction X of the products 10 susceptible to air contamination.
  • the worktop is not tightly connected to the rest of frame 30. As a result, there may be an induction of air contaminated by the space left free between the worktop and the frame.
  • Two additional sterile air outlets 203 are provided, presenting in the form of a slot extending longitudinally to said direction X over any the length at the edges and under the worktop P.
  • An air outlet 202 identical to that described in FIG. 1 and in FIG. 2 is also provided.
  • the gas stream 204 is distributed on either side of the work plan according to 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 are directed in a direction perpendicular to said plane.
  • FIG. 5 which includes the same work station P not connected to the frame 30 as in Figure 4, a U-profile 205 fixed under the frame forms a conduit bringing a slight overpressure sterile air stream under workstation P preventing any induction of contaminated air by the spaces left free due to the lack of sealing between the frame and the worktop.
  • the device comprises a conveyor belt P, the 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.

Landscapes

  • 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)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Ventilation (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Prevention Of Fouling (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Air Bags (AREA)
  • Prostheses (AREA)
  • Cleaning In General (AREA)
  • Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
EP96913582A 1995-04-14 1996-04-12 Dispositif de protection anti-contamination rapprochee Expired - Lifetime EP0830549B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9504526A FR2733036B1 (fr) 1995-04-14 1995-04-14 Dispositif de protection anti-contamination rapprochee
FR9504526 1995-04-14
PCT/FR1996/000563 WO1996032613A1 (fr) 1995-04-14 1996-04-12 Dispositif de protection anti-contamination rapprochee

Publications (2)

Publication Number Publication Date
EP0830549A1 EP0830549A1 (fr) 1998-03-25
EP0830549B1 true EP0830549B1 (fr) 2002-06-26

Family

ID=9478140

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96913582A Expired - Lifetime EP0830549B1 (fr) 1995-04-14 1996-04-12 Dispositif de protection anti-contamination rapprochee

Country Status (9)

Country Link
US (1) US6035549A (ja)
EP (1) EP0830549B1 (ja)
JP (1) JP4113256B2 (ja)
AT (1) ATE219831T1 (ja)
CA (1) CA2218416C (ja)
DE (1) DE69622037T2 (ja)
ES (1) ES2176454T3 (ja)
FR (1) FR2733036B1 (ja)
WO (1) WO1996032613A1 (ja)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19712975A1 (de) * 1997-03-27 1998-10-01 Gwe Ges Fuer Wasseraufbereitun Verfahren zur Optimierung der Luftführung in einer Reinluft-Kabine
US6096135A (en) * 1998-07-21 2000-08-01 Applied Materials, Inc. Method and apparatus for reducing contamination of a substrate in a substrate processing system
FR2785040B1 (fr) 1998-10-22 2001-01-19 U N I R Ultra Propre Nutrition Dispositif et procede pour la protection rapprochee de produits ou objets sensibles a des agents contaminants vehicules par l'air ambiant
US20040251175A1 (en) * 1998-10-30 2004-12-16 Adams Thomas C. Apparatuses and methods for making glued screen assemblies
US7350315B2 (en) 2003-12-22 2008-04-01 Lam Research Corporation Edge wheel dry manifold
US7089687B2 (en) * 2004-09-30 2006-08-15 Lam Research Corporation Wafer edge wheel with drying function
FR2973100B1 (fr) * 2011-03-22 2018-02-09 Institut National De Recherche En Sciences Et Technologies Pour L'environnement Et L'agriculture (Irstea) Installation de diffusion de flux d'air

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4021928A (en) * 1973-12-18 1977-05-10 Research Corporation Cross-flow modular tobacco curing system
FR2485700B1 (fr) * 1980-06-24 1986-02-28 Aurore Sa Procede pour etablir un ecoulement laminaire determine et poste de travail en comportant application
US4750276A (en) * 1984-05-10 1988-06-14 Donald Paul Smith Impingement thermal treatment apparatus with collector plate
US4872400A (en) * 1988-12-12 1989-10-10 Air Concepts, Inc. Laboratory work station with controllable environment
JP2644912B2 (ja) * 1990-08-29 1997-08-25 株式会社日立製作所 真空処理装置及びその運転方法
FI88541C (fi) * 1991-04-23 1993-05-25 Ilmateollisuus Oy Foerfarande och anordning foer att aostadkomma en luftvaexling foer ett behandlingsrum
US5211106A (en) * 1991-05-22 1993-05-18 Oscar Mayer Foods Corporation Apparatus and method for cooking casingless shaped food products
US5351415A (en) * 1992-05-18 1994-10-04 Convey, Inc. Method and apparatus for maintaining clean articles
DE69205571T2 (de) * 1992-08-04 1996-06-13 Ibm Unter Druck stehende Koppelsysteme zum Transferieren von einem Halbleiterwafer zwischen einem tragbaren abdichtbaren unter druckstehenden Behälter und einer Bearbeitungsanlage.
ES2078717T3 (es) * 1992-08-04 1995-12-16 Ibm Aparato de reparticion con un sistema de distribucion y alimentacion de gas para manipular y almacenar recipientes transportables estancos a presion.
US5628121A (en) * 1995-12-01 1997-05-13 Convey, Inc. Method and apparatus for maintaining sensitive articles in a contaminant-free environment
US5724748A (en) * 1996-07-24 1998-03-10 Brooks; Ray G. Apparatus for packaging contaminant-sensitive articles and resulting package

Also Published As

Publication number Publication date
JPH11503815A (ja) 1999-03-30
DE69622037D1 (de) 2002-08-01
WO1996032613A1 (fr) 1996-10-17
JP4113256B2 (ja) 2008-07-09
FR2733036B1 (fr) 1997-07-04
ATE219831T1 (de) 2002-07-15
EP0830549A1 (fr) 1998-03-25
ES2176454T3 (es) 2002-12-01
CA2218416C (fr) 2008-07-08
DE69622037T2 (de) 2002-11-21
FR2733036A1 (fr) 1996-10-18
CA2218416A1 (fr) 1996-10-17
US6035549A (en) 2000-03-14

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