EP1977837B1 - Labor-Abzugsschrank - Google Patents

Labor-Abzugsschrank Download PDF

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Publication number
EP1977837B1
EP1977837B1 EP20080153923 EP08153923A EP1977837B1 EP 1977837 B1 EP1977837 B1 EP 1977837B1 EP 20080153923 EP20080153923 EP 20080153923 EP 08153923 A EP08153923 A EP 08153923A EP 1977837 B1 EP1977837 B1 EP 1977837B1
Authority
EP
European Patent Office
Prior art keywords
handle
air
outs
openings
cut
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.)
Not-in-force
Application number
EP20080153923
Other languages
English (en)
French (fr)
Other versions
EP1977837A1 (de
Inventor
Thierry Eliot
Jamy Verna
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.)
Equip Labo
Original Assignee
Equip Labo
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 Equip Labo filed Critical Equip Labo
Publication of EP1977837A1 publication Critical patent/EP1977837A1/de
Application granted granted Critical
Publication of EP1977837B1 publication Critical patent/EP1977837B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
    • B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
    • B08B15/023—Fume cabinets or cupboards, e.g. for laboratories

Definitions

  • the present invention relates to a laboratory fume cupboard, meeting all the safety and performance requirements of French and European standards in the field.
  • a fume cupboard is a laboratory device for receiving chemicals used by operators. This device is intended to ensure the protection of operators by limiting the spread of air pollutants in the laboratory.
  • a fume cupboard comprises a ventilated enclosure 10, closed by two side walls 11, a horizontal work surface 13, as well as a front face and a rear face. The front face is provided with a vertically movable facade 12, to allow access to chemicals by the operators.
  • There are different types of fume cupboards among which we can mention the constant air flow fume cupboards and fume cupboards with variable air flow according to the opening of the mobile facade. Fume cupboards, like all laboratory equipment, are subject to very strict requirements codified by safety standards, particularly at European and French levels. Since the publication of the first standards, the design of the fume cupboards has been adapted according to these safety and performance requirements.
  • the level of protection of the operators, when handling chemicals in the fume cupboard can be evaluated using many criteria, among which we can mention the maximum opening height of the mobile front panel, the speed of air entering the fume cupboard or the level of containment. These last two criteria must be measured in the plane of the mobile front facade of the fume cupboard, since this is where the users are.
  • the French standard requires that the value of the confinement, measured at nine points on the frontal surface, be less than 0.1 parts per million (ppm).
  • one solution is to create an air curtain at the front of the enclosure, thus avoiding an output of pollutants, and to meet the level of confinement required.
  • a fume cupboard according to the invention comprises openings in the frame of the opening area, openings that allow to establish a direct communication between the inside and outside of the enclosure, and to channel the movement of air that occurs. It is specified here that, by framing the opening area, we mean the ends of the vertical side walls supporting the movable facade, the end of the work plan located above the facade or recessed, for example 50 mm, with respect to this plumb, the bottom of the movable facade, or any integral part of one of these elements. This frame is thus entirely in the plane of the mobile facade.
  • the fume cupboard standards require the front of the fume cupboards to be translucent.
  • a transparent material such as glass, is preferably chosen for the manufacture of the mobile facade.
  • the openings are oriented so that the air is channeled to form a curtain of air in the plane of the movable facade, or in a plane substantially oblique with respect to the plane of the front facade. Therefore, in a fume cupboard according to the invention, no additional electrical means is required since only the configuration of the openings is used to create the air curtain that allows to meet the requirements in terms of confinement.
  • a first embodiment is based on the observation already made that changes in the design of a fume cupboard involve many costs in terms of development and manufacturing, since it is appropriate, for example, to modify the manufacturing processes.
  • the openings are made in a handle installed at the bottom of the mobile facade.
  • this solution makes it possible to modify in no way the main frame of the existing fume cupboards, but to intervene only at the level of the handle, which is an additional element, integral with the mobile facade.
  • This handle is designed to meet the requirements in this regard, since, for example, the standard requires that the size and position of the movable facade handles do not pose a risk to the operator by reducing his field of vision or workspace.
  • the outside air attracted by the depression created in the enclosure, enters the interior of the handle via the external openings, and is transmitted inside the enclosure via the interior openings.
  • the outer openings are made on a horizontal face of the handle. These openings are made perpendicularly to this face, thus creating a vertical airflow entering the handle.
  • the interior openings they are, in one embodiment, practiced on a lower angle of the handle. This positioning of the interior openings allows the creation, at the outlet of the handle, of a flow of air in a slightly oblique direction relative to the vertical plane located at the base of the movable facade. The oblique direction makes it possible to create an air curtain whose effectiveness is reinforced.
  • the outer openings are circular in shape and, in another embodiment, usable in combination, the inner openings are rectangular in shape.
  • the handle comprises a plug at each of its ends, to ensure its sealing.
  • the openings are made in a groove installed on a side wall of the enclosure, and intended to receive the movable facade.
  • openings make it possible to establish a direct communication channel between the outside of the fume cupboard and the inside of the enclosure.
  • the openings are made inside the grooves, horizontally, or in a direction parallel to normal to the side faces of the enclosure. This orientation of the openings makes it possible to direct the air so as to form a curtain of air in the plane of the movable facade.
  • the positioning of the openings in a groove, intended to receive the movable facade, makes it very easy to open these openings when it is necessary to create a curtain of air.
  • the movable facade is raised, thus allowing air flow from the outside of the fume hood inwards, via the openings thus discovered.
  • the main difference between this embodiment and that implementing a handle lies in the permanent appearance and / or temporary creation of the air curtain.
  • the air curtain is retained regardless of the position of the mobile facade, since this facade is such that it does not achieve complete sealing of the fume cupboard, even in the closed position, this which results in the preservation of an air flow permanently.
  • no air flow is created when the facade is in the lower position, since all the openings are closed.
  • This second embodiment has, among others, the advantage of allowing the creation of a variable air curtain depending on the opening level. Indeed, the more the movable facade is raised, the greater the number of unclosed openings is important, which has the effect of increasing the amount of air introduced. In order to be able to control this variation, it is useful, in one embodiment, for the openings to be evenly distributed over the groove, between the bottom of this groove and a maximum opening position of the mobile facade.
  • the maximum opening position of the movable facade corresponds to the movable bottom of the facade when it is in a high abutment position for conventional use.
  • the standards in force require that, during a use of the fume cupboard by an operator, the mobile facade can not be raised in such a way the opening zone has a height greater than a predetermined value, for example fixed at 40 or 50 centimeters according to the standards and / or the requirements of the users.
  • the movable facade slides inside two machined grooves or recessed rails in each of the side walls of the fume cupboard.
  • the outer openings 51 are made in the second horizontal surface 32. These openings are in the form of circular holes. They are, in some embodiments, practiced regularly over the entire length of the handle. In one example, the openings 51 have a diameter of 5 millimeters, and, as shown in FIG. figure 3b they are distributed along the length with a step of 20 millimeters. He appears on this figure 3b whereas, seen from above, the handle has a width of 44.9 millimeters.
  • the second horizontal surface 31 is framed by two vertical surfaces, namely the vertical surface 23 and the outer wall of the movable facade. This configuration has the effect of creating a nozzle for the acceleration of the air before entering the handle via the outer openings 51.
  • the external openings 52 are, in turn, made at the angular edge formed by the lower end of the vertical surface 21 and the lower end of the arc 42. These openings 52 have an aperture of 5 millimeters in the vertical surface 21, and 1 millimeter in the circular arc 42. As shown on the figure 3c , the outer openings 52 have a rectangular shape, and are evenly distributed over the entire length. In one example, they each have a length of 111 millimeters, and the solid space between two openings has a length of 40 millimeters.
  • the angle formed by the surface 31 and the surface 22 contributes to creating, with the bottom of the arc 42, a second nozzle allowing a good channeling of the air passing through the handle, at the time of exit by the external openings 52.
  • the right angle formed by the intersection of the horizontal surface 31 and the vertical surface 22 is replaced by a quarter circle. This configuration allows, in some cases, to improve the circulation of air inside the handle, and thus the efficiency of the creation of the air curtain.
  • the handle being hollow, it is necessary to close at each end, to prevent the air entering through the outer openings is dispersed by these ends.
  • plugs are integrally installed at each end. These plugs are elements, for example made of plastic material, which are glued to the outer edges of the peripheral wall of the handle.
  • the figure 4 shows a sectional view of a detail of a fume cupboard according to the invention.
  • a handle 1 installed on the bottom
  • This movable facade is intended to close a chamber 3 in depression. It should be noted that, even when the mobile facade is in the closed position, it does not achieve complete sealing of the fume cupboard, as this would lead to a suppression of the airflow necessary for the creation of the air curtain in the plane of the mobile facade, and prevent the evacuation of toxic vapors.
  • the handle is deployed on the lower horizontal part of the movable front 2.

Landscapes

  • Air-Flow Control Members (AREA)
  • Curtains And Furnishings For Windows Or Doors (AREA)
  • Ventilation (AREA)

Claims (6)

  1. Laborabzug, der umfasst:
    - eine Kammer (3 ; 10), in der der Innendruck unter dem Außendruck liegt und die durch Seitenwände (11), sowie durch eine Rück- und Vorderwand mit einer beweglichen Fassade (2 ; 12) geschlossen ist, und
    - Mittel, um in der Ebene der beweglichen Fassade einen Luftvorhang zu erzeugen,
    dadurch gekennzeichnet, dass diese Mittel Öffnungen (51, 52) umfassen, die in einem hohlen Griff im unteren Bereich der beweglichen Fassade (2) des Abzugs eingearbeitet sind, wobei diese Öffnungen (51, 52) ein Ableiten der Luft in eine derart gerichtete Richtung erlaubt, dass die Außenluft, die durch diese Öffnungen strömt, den Luftvorhang bildet, wobei die Öffnungen (51, 52) innere Öffnungen (52) umfassen, die zwischen der Innenseite des Griffs und der Innenseite der Kammer an einem unteren Winkel des Griffs eingearbeitet sind, um einen Luftstrom in eine leicht geneigte Richtung in Bezug zur senkrechten Ebene im Lot der beweglichen Fassade (2) zu erzeugen.
  2. Laborabzug nach Anspruch 1, dadurch gekennzeichnet, dass die Öffnungen außerdem äußere Öffnungen (51) umfassen, die zwischen der Außenseite des Abzugs und der Innenseite des Griffs (1) eingearbeitet sind.
  3. Laborabzug nach Anspruch 2, dadurch gekennzeichnet, dass die äußeren Öffnungen (51) auf einer waagrechten Seite (32) des Griffs, senkrecht zu dieser Seite, eingearbeitet sind.
  4. Laborabzug nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass die äußeren Öffnungen (51) kreisförmig sind.
  5. Laborabzug nach einem der vorliegenden Ansprüche, dadurch gekennzeichnet, dass die inneren Öffnungen (52) rechteckig sind.
  6. Laborabzug nach einem der vorausgehenden Ansprüche, dadurch gekennzeichnet, dass der Griff an beiden Enden eine Verschlusskappe aufweist, um seine Abdichtung zu gewährleisten.
EP20080153923 2007-04-04 2008-04-01 Labor-Abzugsschrank Not-in-force EP1977837B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0754283A FR2914569B1 (fr) 2007-04-04 2007-04-04 Sorbonne de laboratoire

Publications (2)

Publication Number Publication Date
EP1977837A1 EP1977837A1 (de) 2008-10-08
EP1977837B1 true EP1977837B1 (de) 2014-09-10

Family

ID=38599393

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20080153923 Not-in-force EP1977837B1 (de) 2007-04-04 2008-04-01 Labor-Abzugsschrank

Country Status (2)

Country Link
EP (1) EP1977837B1 (de)
FR (1) FR2914569B1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009002458A1 (de) 2009-04-17 2010-10-21 Waldner Laboreinrichtungen Gmbh & Co. Kg Laborabzug
DE102009002456A1 (de) * 2009-04-17 2010-10-21 Waldner Laboreinrichtungen Gmbh & Co. Kg Rahmenprofil für einen Laborabzug sowie ein ein derartiges Rahmenprofil umfassender Laborabzug mit Stützstrahltechnik
EP2564948B1 (de) * 2011-09-02 2016-07-27 GFP Gesellschaft für Produktentwicklung und Produktivitätsplanung mbH Abzug und Verfahren zum Reduzieren der Schadstoffkonzentration
JP6343137B2 (ja) * 2013-10-16 2018-06-13 株式会社オカムラ 排気装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6428408B1 (en) * 2000-05-18 2002-08-06 The Regents Of The University Of California Low flow fume hood
SE523532C2 (sv) * 2000-08-28 2004-04-27 Bengt Lennart Lundin Arrangemang vid en ventilerbar arbetskammare
US6461233B1 (en) * 2001-08-17 2002-10-08 Labconco Corporation Low air volume laboratory fume hood
US7318771B2 (en) * 2005-07-19 2008-01-15 Institute Of Occupational Safety And Health, Council Of Labor Affairs Air-isolator fume hood

Also Published As

Publication number Publication date
FR2914569B1 (fr) 2010-01-08
FR2914569A1 (fr) 2008-10-10
EP1977837A1 (de) 2008-10-08

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