EP2689196B1 - Einrichtung zur diffusion eines lufstromes - Google Patents

Einrichtung zur diffusion eines lufstromes Download PDF

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Publication number
EP2689196B1
EP2689196B1 EP12714816.1A EP12714816A EP2689196B1 EP 2689196 B1 EP2689196 B1 EP 2689196B1 EP 12714816 A EP12714816 A EP 12714816A EP 2689196 B1 EP2689196 B1 EP 2689196B1
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EP
European Patent Office
Prior art keywords
air
guide walls
work surface
diffusion
walls
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EP12714816.1A
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English (en)
French (fr)
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EP2689196A2 (de
Inventor
Georges Arroyo
Philippe Georgeault
Laurence Wallian
Anthony Guibert
Michel Loubat
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Institut National de Recherche en Sciences et Technologies Pour Lenvironnement et lAgriculture IRSTEA
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Institut National de Recherche en Sciences et Technologies Pour Lenvironnement et lAgriculture IRSTEA
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F9/00—Use of air currents for screening, e.g. air curtains
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F9/00—Use of air currents for screening, e.g. air curtains
    • F24F2009/007—Use of air currents for screening, e.g. air curtains using more than one jet or band in the air curtain

Definitions

  • the present invention generally relates to airflow diffusion installations.
  • the invention relates to an airflow diffusion installation which comprises a work surface having two opposite edges, diffusion means for diffusing an air flow towards the work surface, and a set of transparent guide walls located in the extension of the diffusion means.
  • a cold thermal environment is a direct risk factor for the operator, especially for the canal syndrome carpal.
  • a cold environment requires the operator to use a surplus of clothing protection, which hinders his movements and therefore in his work.
  • a cold atmosphere causes the operator a loss of dexterity and grip strength.
  • the diffusion installation according to the document FR-2485698 does not offer good working conditions to operators who can work only on one longitudinal side of the installation, and without the benefit of stable air barriers to separate cheaply the atmosphere of the workshop. atmosphere of the localized volume of products. Indeed, in the document FR-2485698 , the walls used are only used to partition several workspaces. Similarly, the known installation of the document DE-36 32 276 allows to work only one longitudinal side of the installation and does not allow to form stable air barriers to provide good working conditions to operators.
  • the object of the present invention is to provide an air diffusion installation for improving the working conditions of the operators while ensuring the maintenance of the products at a given temperature.
  • an object of the present invention is to diffuse on products to handle an air flow of different temperature compared to that of the ambient air, while limiting the physical and thermal exchanges between the air and the ambient air of the area in which the operator (s) is located to improve their working conditions.
  • the present invention also aims to provide an installation for continuously diffusing and in a localized space, air at a given temperature to maintain the products at this temperature, and clean to protect said product or products of air contamination, while limiting the negative effects of the difference in temperature between the air diffused in the working volume of the products and the ambient air around the installation on the working conditions of the operator (s) .
  • the present invention also aims to limit the energy consumption of the installation.
  • said localized working volume of the products is open on two opposite sides corresponding to the longitudinal opposite edges of the working surface along which the operators are positioned.
  • the bilaterality of access to said localized volume in which the products are presented thus allows two operators located on either side of the work surface to manipulate the products present in said volume while having in their field of vision the operator opposite, which allows them to work more efficiently.
  • the working conditions for operators working opposite each other on the working surface are also improved by a specific combined arrangement of the suction means and the inner and outer walls, which makes it possible to form stable air barriers on both sides other of the working surface between the diffused central and lateral air flows which impact the products and the ambient air of the external zone in which each operator is located.
  • said arrangement of said suction openings along two opposite edges of the working surface thus makes it possible to channel the diffused air and to at least partially delimit said localized space, also called useful working volume, or working area, through the air is diffused, so that it does not flow towards the operators.
  • Said diffused air is advantageously a so-called cold air, that is to say a temperature below the ambient temperature around the installation, preferably at least 13 ° C., and generally between -2 ° C. and 4 ° C.
  • the diffused air has, relative to the ambient air of the zone in which the installation is located, or the operator or operators, a temperature difference, preferably of at least 10 ° C. .
  • the ambient air of the work premises must meet certain requirements in order to guarantee the thermal comfort of the employees.
  • the ISO 7730 standard presents, for moderate thermal environments, a method for predicting the thermal sensation and specifies acceptable conditions of comfort. It defines the "PMV" index which gives the average opinion of a group of people expressing a thermal sensation vote according to parameters such as measurable thermal environment parameters, for example temperature, air velocity, radiation, hygrometry, and, possibly, estimated parameters, for example the dress and activity.
  • the suction means make it possible to reduce the risk of mixing between the diffused air and the ambient air of the zone in which the operator is located.
  • Said suction means reinforce the air flows diffused through the set of walls, in particular the lateral and external air flows, and generate a preferred direction for said diffused air flows on the products, which limits the losses of air diffused towards the ambient air of the zone in which the operator or operators are located.
  • Said suction means distributed on either side of the working surface thus make it possible to preserve the ambient conditions around each operator and the temperature conditions of the air diffused on each product present in the working zone.
  • the installation according to the invention makes it possible to improve the quality and the guiding of the air flow diffused through said localized space traversed by the products and open on the zone in which the operator or operators is located, while limiting the risk. disturbance of the diffused air flow.
  • Said area in which is located said or each operator is adjacent to said useful volume through which the products and through which the air is diffused.
  • the installation according to the invention can deliver cold air flows on the work plan, while establishing airspace boundaries between the atmosphere of the workshops and the atmosphere which must be kept in the immediate vicinity of products for health reasons or for the preservation of quality.
  • the installation according to the invention makes it possible to reconcile health performance and improvement of working conditions in the food industry.
  • Said installation also makes it possible to separate, at lower cost, the temperate atmosphere of a workshop, from a temperature of between 13 ° C and 18 ° C, of the ultra-clean and cold environment with a temperature of between -2 ° C. C and 4 ° C, around the product or products to handle.
  • each external air flow that is to say each flow that extends on the outside of the corresponding outer guide wall, in combination with the openings, allows the suction means located substantially in the extension of said flow, to form a stable air barrier between the diffused central and lateral air flows which impact the products and the ambient air of the outer zone in which the or each operator is located, which makes it possible to obtain in said ambient zone the or each operator an air velocity of less than 0.2 m / s in order to limit the sensation of temperature variation, in particular of cold, in the evolution zone of the operators.
  • each external air flow which licks the outer face of each outer guide wall forms a fluid barrier between the corresponding lateral air flow and the ambient air of the zone in which the operator is located, which makes it possible to act in stabilization on a possible turbulent flow which could be formed at the level of said lateral flow, in particular when the arm of the operator (or any other tool or obstacle) crosses said lateral flow.
  • the longitudinal guide walls, the suction means and the means of are arranged in such a way that the external air flows, which lick the external faces of the outer guide walls, are diffused opposite the suction openings and / or in the width range of the working surface delimited between said suction openings, so that the guard vein formed by each external air flow does not overflow the work surface and therefore does not spread in the space occupied by the operators, unlike the vein of custody of the proposed installation in the document FR2485698 .
  • each outer guide wall avoids the appearance of condensation on said outer guide walls, which ensures good visibility for the operators through said guide walls and thus improves the working conditions of the operators, in particular when two operators work side by side.
  • an operator is located on the side of each opposite edge of the working surface at which extends a suction opening.
  • said installation comprises conveying means having a conveying surface forming said working surface, said conveying means comprising means for moving said conveying surface and said conveying surface having two longitudinal edges. opposed which extend substantially in the direction of travel, and which form said opposite edges of the work surface.
  • suction openings are distributed on either side of the longitudinal axis of the conveying surface corresponding to the axis of travel of said conveying means.
  • said outer walls extend between and away from said opposite edges of said working surface.
  • said diffusion means extend laterally outwardly outwardly of the outer guide walls, such that each external air flow diffused on the outer side of each outer guide wall. forms an air barrier with the area outside the installation in which an operator is to be present.
  • each outside air flow is delimited on one side by the corresponding outer guide wall of the set of walls, but said flow is not delimited physically on the other side by an additional wall
  • C ' is the opening of the suction means combined with the corresponding outer guide wall which makes it possible to maintain the stable external air flow on the side of said zone outside the installation without the need for an additional wall to contain said flow of outside air and separate it from the ambient air of the said area outside the installation.
  • Said external air flow thus forms a ventilation barrier with the ambient air of the zone outside the installation in which an operator is intended to be present.
  • said installation also comprises at each end of the set of guide walls, a so-called front end wall, respectively a rear end wall, which extends orthogonally to the guide walls. and at the work surface, so as to at least partially close the front and rear ends of the guide wall assembly.
  • At least one of said front and rear end walls has at least one lower part spaced from the working surface by a distance of between 10 and 20 cm to generate a curtain of dynamic dedusting of the products by the clean air diffused by said diffusion means which escapes naturally from said localized space in which said air is diffused.
  • said suction means comprise at each of said opposite edges of the working surface, a box provided with said at least one air suction opening and two columns arranged at, or in the vicinity of the ends of said box capable of recovering the aspirated air flows and redirecting them towards said diffusion means, which are preferably associated with cooling means.
  • said installation comprises means for filtering the air flow diffused by said diffusion means, positioned upstream of said set of guide walls.
  • said filtration means adjoin the set of guide walls by interconnecting the edges of the inner and outer guide walls opposite the free edges of said guide walls located on the side of the work surface.
  • Such an arrangement of the filtration means applied against the set of guide walls makes it possible to filter the airflow diffused, very downstream, so as to limit the risk of contamination of said air, while minimizing the pressure losses incurred by said airflow.
  • said suction openings are located flush with the working surface or below said working surface.
  • Such an arrangement of the suction openings makes it possible to suck up the air flows coming from the set of guide walls, after their impact on the working surface by accompanying them as close as possible to the working surface to reduce turbulence. and thus limit the risk of said air flows flowing out of said localized working space of the products to the environment of the operator or operators.
  • Said products are preferably agri-food products but may be formed by other products, in particular sensitive products that need to be cooled or kept at a temperature by cold, clean air, that is to say practically free of contaminating particles. , such as pharmaceuticals.
  • said clean air has an ISO06 level cleanliness (ISO 14644-1 standard) corresponding to a cleanliness class 1000.
  • Cold air is understood to mean an air of temperature lower than the ambient air temperature, preferably from minus 10 ° C, and generally between -2 ° C and 4 ° C.
  • the invention relates to a cold air flow diffusion installation capable of maintaining or cooling products at a given temperature.
  • Said installation makes it possible to diffuse cold air into a localized space or volume 43, that is to say a space of limited size, within which at least one product to be handled by a device can be present. or operators.
  • said localized space 43 is a space through which said products are intended to be conveyed to be worked by one or more operators.
  • Said localized space 43 is also called useful working volume.
  • the said installation comprises a work surface 40 on which rest the products to be handled.
  • this working surface is mobile and formed by the conveying surface conveying means 4 provided with means for scrolling said conveying surface.
  • Said conveying surface may be a conveying or thermoforming-film strip, ensuring the scrolling of products through said localized space.
  • said work surface may be a fixed work surface.
  • Said working surface 40 has two opposite edges, called longitudinal edges, which extend substantially along said direction of travel.
  • the localized air diffusion space 43 is delimited by the set of guide walls and the working surface facing said set of guide walls.
  • Said localized air diffusion space 43 has two opposite sides delimited between one edge of said working surface and the outer wall of the guide assembly closest to said edge, and the other between the opposite edge of said working surface and the corresponding outer wall of the guide assembly.
  • said localized space is open on two opposite sides corresponding to the opposite longitudinal edges of the working surface along which the operators are positioned.
  • Said installation also comprises cold air diffusion means 2, and an assembly 3 of transparent guide walls situated in the extension of the diffusion means 2.
  • said installation comprises means for producing cold air or that these are outsourced.
  • said diffusion means 2 comprise means for forced circulation of air, such as a fan.
  • Said diffusion means 2 also comprise a diffusion box 21 configured to allow the diffusion of cold air flow between the guide walls which extend and the outer side of said outer guide walls.
  • Said diffusion box 21 forms a ceiling above the useful working volume and the work surface forms a floor.
  • Said plant comprises suction means 5 having at least one suction opening 50 along at least a portion of each longitudinal edge of the working surface 40.
  • Said guide walls 30, 31 comprise at least two so-called outer guide walls 31 and two so-called inner guide walls 30 which extend between the two outer guide walls 31, said inner and outer guide walls 30, 31 being, preferably, parallel to each other.
  • Said inner and outer guide walls 30, 31 and said diffusion means 2 are arranged in such a way that the air flow 8 diffused by said diffusion means 2 is distributed in an air flow 80, called air flow. central, diffused between the inner guide walls, a flow 81 of air, said lateral air flow, diffused between each inner guide wall 30 and the outer guide wall 31 located opposite, and a flow 82 of air, said external air flow, diffused on the outside of each outer guide wall 31.
  • each air flow 82 which licks the outer face of each outer guide wall forms a fluid barrier between the corresponding lateral airflow and the ambient air of the area in which the operator is located.
  • Each air flow 82 is physically delimited by the installation only by the corresponding outer guide wall 31.
  • each air flow 82 forms on the side of the zone, called workshop, in which the operator is located, a stable air barrier without the need for an additional wall that would be positioned between this air flow 82 and the zone in which is the operator and would be subjected to condensation, which would harm the good working conditions of the operator.
  • each zone of the installation which extends between an outer guide wall 31 and the outer longitudinal edge of the diffusion means 2 is devoid of a guide wall parallel to said outer guide wall 31, so that the longitudinal guide walls of the set of laterally laterally furthest apart walls, namely the outer guide walls 31 are set back from the outer longitudinal edges of the diffusion means 2.
  • Said useful volume through which cold and clean air circulates corresponds to a working area of the products of width corresponding to the width of the working surface, of length corresponding to the length of the guide walls, that is to say say to the spacing between the front and rear end walls, and height corresponding to the distance between the lower edge of the guide plates and the working surface.
  • This useful volume corresponds to the volume swept by the cold and clean air which is also open to the environment of the operator to enable him to manipulate the products present in said useful volume.
  • the combination of external flows 82 and side 81 obtained through the walls of inner and outer guides, and the suction means 5, can contain the cold air in said useful volume so that it does not flow into the environment of the operator (s).
  • the outer guide walls lined with the inner guide walls make it possible to obtain a central flow between the inner guide walls and a lateral flow on each side of the central flow, as well as an external flow which licks the outer face of the inner flow.
  • each outer guide wall. Said streams then have substantially the same direction, mostly vertical, then are distributed to the opposite longitudinal edges of the working surface at which they are sucked by the corresponding suction openings.
  • the guide walls and the filtering means which adjoin the guide walls upstream of said guide walls, also allow to keep cold and clean air in the work area of the products.
  • the guide wall assembly defines a cold and clean air containment space open above the work surface.
  • each external flow in contact with the ambient air of the zone in which an operator is located has a warm temperature which reduces the temperature gradient between the air of the lateral flows and the ambient air of the zone in which locates the operator, which limits the thermal and physical instability of the ambient air at the boundary between the localized working space and the area where the operator is located.
  • the doubling of the outer side walls by the inner side walls allows the cold air to be blown to the working volume delimited between the free lower ends of the side walls and the working surface, preventing any destabilization of the cold air flow. upstream of this useful volume of work.
  • the lateral suction openings provided at the edges of the working plane formed by the working surface 40 make it possible to stabilize these horizontal flows while isolating them from the flows of outside air currents which are also attracted by these suction openings.
  • the ambient air close to the diffused external flow 82 is automatically dragged under the effect of the viscosity (induction phenomenon) in a descending vertical movement converging towards the suction openings 50, which makes it possible to reduce the horizontal gradient of temperature between the cold flows of the useful volume and the warm ambient air of the zone in which the or each operator is located. This reduction of the gradient contributes greatly to the dynamic and thermal stability of the air boundary which separates the useful working volume from the zone in which the or each operator is located.
  • the combination of the set of guide walls and the diffusion means with the distribution of the suction means on each longitudinal side makes it possible to stabilize the air around the product handled in order to limit the interactions with the ambient air and to avoid the joint degradation of the air quality of the useful volume (thermal and dust degradation), and of the air surrounding the operator (thermal and dynamic degradation), so that the two-way access to the localized volume of work does not affect the working conditions and maintenance of the temperature of said localized volume, but on the contrary favors the work of operators who can position themselves vis-à-vis and thus do not work in front of a wall, while remaining in an atmosphere of favorable and calm temperature.
  • the inner and outer guide walls 30, 31 are situated in a plane orthogonal to the working surface 40, and parallel to the longitudinal axis (or median axis) of the working surface, that is to say parallel to the running direction of said working surface 40 when it is of the conveying surface type, that is to say in a longitudinal vertical plane.
  • Such a design and such an arrangement of the guiding walls makes it possible to obtain diffused air curtains which extend in a longitudinal vertical plane above the products and which form, with respect to each other, a somehowlic barriers making it possible to stabilize the or the adjacent air flows, so as, in cooperation with the suction means, to contain said air diffused into said useful volume of passage of the products, limiting the mixing of the diffused air with the ambient air in which is present the or each operator, that is to say while keeping around the operator a temperate temperature not influenced by said diffused air.
  • Said outer walls 31 also extend in a space delimited between and set back from the longitudinal edges of said work surface 40.
  • recessed means that the outer walls 31 extend vertically above the diffusion box 21 and away from the longitudinal edges of said diffusion box 21.
  • the recessed disposition of said outer guide walls allows operators located on either side of the working volume of products, to work in a comfortable position since they can advance the head above the edges of said work surface without be hampered by said outer guide walls.
  • the assembly 3 of guide walls is arranged with said working surface 40 so as to provide a free space between said working surface and said set 3 of guide walls, to allow operators located on either side of the 3 set of guide walls to access and handle the products that are in said working area formed by the useful volume 43.
  • Said installation also comprises at each end of the set of guide walls 3, a wall 32 referred to as a front end wall, respectively a rear end wall, which extends orthogonally to the inner and outer guide walls 30, 31 and 31. to said work surface 40, so as to close at least partially at the top the front and rear ends of the guide wall assembly 3 to contain the flow of air blown through said guide wall assembly.
  • Said front and rear walls 32 extend, in a direction orthogonal to the working surface 40, a greater distance than the guide walls 30, 31, so that the distance between each guide wall 30, 31 of the working surface 40 is smaller than that which separates the walls of the assembly 3 of guide walls from said working surface 40.
  • At least one of said front and rear walls 32 is of sufficient length for generating a dynamic dust-removal curtain as the products run past the work surface 40 and pass under said end wall.
  • Said front and rear walls 32 are preferably spaced apart from the working surface 40, a distance for example of the order of 20 cm to let the products.
  • These front and rear walls 32 are offset with respect to the corresponding end edge of the diffusion box 21 in the longitudinal direction of the box by a distance of between 2 cm and 5 cm, for example 3 cm.
  • the end walls 32 and the outer guide walls 31 are joined to best contain the flow of air diffused to the work area.
  • the guide walls are located in a longitudinal vertical plane and stop at a distance from the work plane of the order of 50 cm to allow manual access for operators to products that pass to through said useful working volume 43.
  • the outer guide walls are set back from the corresponding longitudinal edge of the diffusion box 21 by a distance of between 1 cm and 5 cm, so that each outside air flow has a small width of between 1 and 5 cm, less than the width of the lateral air flows and the width of the central air flow, which stabilizes the lateral air flows diffused between inner walls and outer walls without disturbing the ambient air of the zone in which locate the or each operator.
  • said suction means 5 comprise on each side of the working surface 40, with respect to the longitudinal axis corresponding to the direction of travel, a box provided on the top with said opening air suction 50 and two columns 6, disposed at or near the ends of said box capable of recovering the flows 80, 81, 82 of air sucked and redirecting them through a collection box 7 located at above the diffusion box 21, to the cold air production means (not shown) to be reinjected into said diffusion means 2.
  • Said installation comprises means 20 for filtering the air flow diffused by said diffusion means 2, positioned upstream of said set 3 of guide walls, with reference to the direction of the flow of the diffused air.
  • the air diffused through the useful working volume 43 is sucked by the air suction means 5 and recirculated by the columns 6 to a collection box 7 to be recycled through the air production means cold to be reinjected into the diffusion box 21.
  • Said filtration means 20 are preferably provided at the bottom face of said diffusion box 21.
  • the bottom face of the box corresponds to that from which extend the walls of the assembly 3 of guide walls.
  • Said bottom face allows the passage of cold air from inside the box to the outside of the diffusion box 21 towards the assembly 3 of guide walls. It is thus possible to provide that the bottom face of the diffusion box is formed by said filtering means 20.
  • Said filtering means 20 extend over a distance, taken in a direction parallel to the direction of separation of the guide walls, greater than said spacing distance of the outer guide walls 31, so as to allow blowing filtered air on either side of the outer guide walls.
  • Said filtration means 20 extend in a substantially horizontal plane, that is to say substantially parallel to the plane of the working surface 40.
  • Said filtration means 20 formed in the diffusion box 21 make it possible to filter and distribute the flow of air over the entire bottom face of the box, in a predetermined direction, substantially orthogonal to the working surface 40, for example a substantially vertical direction, and with a speed distribution close to the uniform.
  • Said filtration means may comprise one or more filters called HEPA filters (High Efficiency Particulate Air-filter in English) in accordance with the EN 1882 standard.
  • Said filtration means 20 adjoin the assembly 3 of guide walls by interconnecting the edges of the inner and outer guide walls opposite the free edges of said guide walls located on the side of the working surface 40.
  • the set of guide walls 3 extends the filtering means, with reference to the direction of circulation of the diffused air.
  • Such a design of the installation makes it possible to filter the air as close as possible to the assembly 3 of guide walls and thus to homogenize the distribution of the air flow diffused by said diffusion means 2 over the whole of the zone of distribution of the guide walls 30, 31 and thus to limit the risk of contamination of the diffused air.
  • Said filtration means 20 are situated on the opposite side to the working surface 40 with respect to the assembly 3 of guide walls.
  • the bottom face of the diffusion box 21 is formed by a diffusing screen ensuring, as does a HEPA filter, a homogeneous distribution of the air diffusion rates, without ensuring the high efficiency filtration.
  • the filtration of air is ensured in a filtration device located upstream of the diffusion box 21, or the device diffuses cold air without ensuring ultra-cleanliness in the localized volume 43.
  • the suction openings 50 are located flush with the upper face of the working surface 40 or at a height set back from said working surface 40.
  • Cold air diffusion installations can also be used in other types of industry than the food industry, for example the pharmaceutical industry, medical and hospital premises or the electronics industry.
  • the installation according to the invention makes it possible to control the frontier zones between diffused air and ambient air in order to limit the risks of contamination during the handling of the products and to maintain a temperature between -2 ° C. and 4 ° C. close to the product. while keeping a temperate room between 13 and 18 ° C, respecting at the level of the operator a temperature gradient from head to foot less than 3 ° C.
  • Such an installation makes it possible to limit the cooling capacity by 50% compared to a conventional equipment of a refrigerated room.
  • the installation according to the invention therefore requires less installed power and less refrigerant mobilized for a production of cold air and clean more homogeneous in space and time.

Claims (10)

  1. Einrichtung zur Übertragung eines Luftstroms, die erlaubt, Luft in ein als Nutzvolumen bezeichnetes lokales Volumen (43) zu übertragen, in dessen Innern mindestens ein Produkt vorhanden sein kann,
    wobei die Einrichtung umfasst:
    - eine Arbeitsfläche (40), die imstande ist, das mindestens eine Produkt zu stützen, wobei die Arbeitsfläche zwei als Längsränder bezeichnete gegenüberliegende Ränder aufweist,
    - Übertragungsmittel (2), die erlauben, einen Luftstrom (8) in Richtung der Arbeitsfläche (40) zu übertragen,
    - eine Einheit (3) von transparenten Führungswänden, die sich in der Verlängerung der Übertragungsmittel (2) befinden,
    dadurch gekennzeichnet, dass die Einrichtung Ansaugmittel (5) umfasst, die mindestens eine Ansaugöffnung (50) entlang mindestens eines Teils jedes Längsrands der Arbeitsfläche (40) aufweisen,
    und dass die Einheit von Führungswänden (30, 31) mindestens zwei äußere Führungswände (31) und zwei innere Führungswände (30), die sich zwischen den zwei äußeren Führungswänden (31) erstrecken, umfasst, wobei die inneren und äußeren Führungswände (30, 31) voneinander beabstandet und vorzugsweise parallel zueinander sind, wobei sich die Führungswände (30, 31) in einer zur Arbeitsfläche (40) orthogonalen und zur Längsachse der Arbeitsfläche parallelen Ebene befinden, die sich zwischen den gegenüberliegenden Rändern der Arbeitsfläche (40) erstreckt,
    und dass die Führungswandeinheit (3) mit der Arbeitsfläche (40) derart ausgebildet ist, dass ein Freiraum zwischen der Arbeitsfläche (40) und der Führungswandeinheit (3) entsteht, um zwei Bedienern, von denen sich der eine auf einer Längsseite der Arbeitsfläche und der andere auf der gegenüberliegenden Seite befindet, den Zugriff auf das lokale Volumen zu erlauben, das von der Führungswandeinheit (3) und von der Arbeitsfläche (40) begrenzt ist,
    wobei die Führungswände (30, 31) und die Übertragungsmittel (2) derart ausgebildet sind, dass der von den Übertragungsmitteln (2) übertragene Luftstrom (8) in einen als zentraler Luftstrom (80) bezeichneten Luftstrom, der zwischen die inneren Führungswände (30) übertragen wird, in einen als seitlicher Luftstrom (81) bezeichneten Luftstrom, der zwischen jede innere Führungswand (30) und die gegenüberlegende äußere Führungswand (31) übertragen wird und in einen als äußerer Luftstrom (82) bezeichneten Luftstrom, der von der Außenseite jeder äußeren Führungswand (31) übertragen wird, aufgeteilt wird.
  2. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Einrichtung Transportmittel (4) umfasst, die eine Transportfläche aufweisen, die die Arbeitsfläche (40) bildet,
    wobei die Transportmittel (4) Durchlaufmittel der Transportfläche umfassen und die Transportfläche zwei Längsränder aufweist, die sich etwa in der Durchlaufrichtung erstrecken und welche die gegenüberliegenden Ränder der Arbeitsfläche (40) bilden.
  3. Einrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass sich die äußeren Führungswände (31) zwischen und von den gegenüberliegenden Rändern der Arbeitsfläche (40) zurückgezogen erstrecken.
  4. Einrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass sich die Übertragungsmittel (2) zu den äußeren Führungswänden (31) seitlich nach außen überstehend derart erstrecken, dass jeder äußere Luftstrom (82), der von der Außenseite jeder äußeren Führungswand (31) übertragen wird, mit der äußeren Zone der Einrichtung, in der ein Bediener anwesend zu sein bestimmt ist, eine Luftbarriere bildet.
  5. Einrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Einrichtung ebenfalls an jedem Ende der Führungswandeinheit (3) eine vordere Endwand (32) beziehungsweise hintere Endwand umfasst, die sich orthogonal zu den inneren und äußeren Führungswänden (30, 31) und zur Arbeitsfläche (40) derart erstreckt, dass das vordere und hintere Ende der Führungswandeinheit (3) mindestens zum Teil verschlossen ist.
  6. Einrichtung nach Anspruch 5, dadurch gekennzeichnet, dass mindestens eine der vorderen und hinteren Endwände (32) mindestens einen unteren und von der Arbeitsfläche (40) in einem Abstand zwischen 10 und 20 cm inklusive beabstandeten Teil aufweist.
  7. Einrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Ansaugmittel (5) auf jeder Seite der Arbeitsfläche (40) einen Kasten umfassen, der mit der mindestens einen Luftansaugöffnung (50) und zwei Säulen (6) ausgestattet ist, die an oder in der Nähe der Enden des Kastens angeordnet und imstande sind, die Luftströme (80, 81, 82) durch Ansaugen abzufangen und sie zu den Übertragungsmitteln (2) umzuleiten, die vorzugweise Kühlmitteln zugeordnet sind.
  8. Einrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Einrichtung Filtermittel (20) des von den Übertragungsmitteln (2) übertragenen Luftstroms (8) umfasst, die vor der Führungswandeinheit (3) positioniert sind.
  9. Einrichtung nach Anspruch 8, dadurch gekennzeichnet, dass sich die Filtermittel (20) an der Führungswandeinheit (3) angrenzend befinden und dabei die Ränder der inneren und äußeren Führungswände, die den freien Rändern der Führungswände, die sich auf der Seite der Arbeitsfläche (40) befinden, miteinander verbinden.
  10. Einrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass sich die Ansaugöffnungen (50) bündig zur Arbeitsfläche (40) oder unterhalb der Arbeitsfläche (40) befinden.
EP12714816.1A 2011-03-22 2012-03-20 Einrichtung zur diffusion eines lufstromes Active EP2689196B1 (de)

Applications Claiming Priority (2)

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FR1152363A FR2973100B1 (fr) 2011-03-22 2011-03-22 Installation de diffusion de flux d'air
PCT/FR2012/050582 WO2012131226A2 (fr) 2011-03-22 2012-03-20 Installation de diffusion de flux d'air

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EP2689196B1 true EP2689196B1 (de) 2016-03-16

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ES (1) ES2575700T3 (de)
FR (1) FR2973100B1 (de)
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DE102020216427A1 (de) 2020-12-21 2022-06-23 Dürr Systems Ag Trennvorrichtung, Behandlungsanlage und Verfahren zum Behandeln von Werkstücken

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2485698B1 (fr) * 1980-06-24 1985-06-14 Aurore Sa Poste de travail a ecoulements laminaires
CH667712A5 (de) * 1985-10-02 1988-10-31 Landis & Gyr Ag Arbeitsstation zur bereitstellung einer stabilisierten lufttemperatur in einer kammer.
JPS62272044A (ja) * 1986-05-20 1987-11-26 Hitachi Ltd 清浄作業台
FR2733036B1 (fr) * 1995-04-14 1997-07-04 Unir Dispositif de protection anti-contamination rapprochee
FR2788843B1 (fr) * 1999-01-26 2001-04-13 U N I R Ultra Propre Nutrition Dispositif de protection rapprochee de produits sensibles par diffusion d'air sterile, avec des extremites d'interface protegees
FR2900718B1 (fr) * 2006-05-03 2008-07-11 Centre Nat Machinisme Agricole Diffuseur d'air filtre

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EP2689196A2 (de) 2014-01-29
FR2973100B1 (fr) 2018-02-09
WO2012131226A3 (fr) 2012-11-22
ES2575700T3 (es) 2016-06-30
WO2012131226A2 (fr) 2012-10-04
PT2689196E (pt) 2016-06-03
PL2689196T3 (pl) 2016-11-30
FR2973100A1 (fr) 2012-09-28

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