EP0491166B1 - Hotte de laboratoire - Google Patents

Hotte de laboratoire Download PDF

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Publication number
EP0491166B1
EP0491166B1 EP91119551A EP91119551A EP0491166B1 EP 0491166 B1 EP0491166 B1 EP 0491166B1 EP 91119551 A EP91119551 A EP 91119551A EP 91119551 A EP91119551 A EP 91119551A EP 0491166 B1 EP0491166 B1 EP 0491166B1
Authority
EP
European Patent Office
Prior art keywords
sliding window
housing
fume hood
work chamber
baffle plate
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
EP91119551A
Other languages
German (de)
English (en)
Other versions
EP0491166A1 (fr
Inventor
Konrad Kreuzer
Jürgen Liebsch
Bernd Schubert
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.)
Waldner Laboreinrichtungen GmbH and Co
Original Assignee
Waldner Laboreinrichtungen GmbH and Co
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 Waldner Laboreinrichtungen GmbH and Co filed Critical Waldner Laboreinrichtungen GmbH and Co
Publication of EP0491166A1 publication Critical patent/EP0491166A1/fr
Application granted granted Critical
Publication of EP0491166B1 publication Critical patent/EP0491166B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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 invention relates to a fume hood according to the preamble of claim 1.
  • Exhaust fume cupboards are generally used to carry out internal work involving hot gases, vapors or fumes, for example work with heated caustic liquids. Such work is, for example, material tests such as testing the acid resistance of paints on metal sheets for the automotive industry.
  • a fume hood must not only meet the requirements when working with smoking materials, it must also meet the requirements of standard fume hoods in all areas where other chemicals and cold caustic substances are used. In particular, he must be able to handle severe Vacuum chemicals such as bromine or NO2 and must meet the ventilation requirements according to DIN 12924.
  • a fume cupboard extractor which is easy to line and has been widely used in the past.
  • This lining can consist of tiles, for example.
  • Such a fume cupboard with a shaft suction has a suction shaft with two in the interior on the rear wall locally restricted top and bottom suction openings.
  • a fume hood with built-in gas scrubber has already been proposed, as shown in Fig. 1 of the accompanying drawing.
  • the ceiling is lowered, therefore the actual fume cupboard has a reduced height and a gas washer is installed above the fume cupboard.
  • the sliding window can then be opened up to the ceiling of the fume cupboard.
  • baffles are used, some of which run diagonally from bottom to top and from back to front, and delimit slots between their top and bottom edges and the back wall or ceiling, which lead to a space behind the baffle plate with which the Suction opening of the suction device is connected.
  • Such a fume cupboard has the advantage over conventional fume cupboards that a gas scrubber can be installed above the actual fume cupboard part.
  • a trigger which is designed in such a way that disturbances of the engagement opening on the interior are avoided, for which the air speed in the inflow opening is adjusted in a certain way. This is achieved in detail through the formation of mutually corresponding chambers and the arrangement of several baffle plates, by means of which a fully mechanical air volume control is possible. The user can also intervene in this regulation via the window and the inclination of a plate.
  • a trigger is also known from US Pat. No. 3,340,788, in which a baffle wall is inserted in the rear space, which partially runs obliquely from bottom to top and from back to front. Slits are delimited between the upper and lower edge and the rear wall of the fume cupboard, which lead to a space behind the baffle plate to which the suction opening of the suction device is connected.
  • the object underlying the invention is therefore to design a smoke extractor according to the preamble of claim 1 so that it meets all requirements for working with and without thermals at a low height, which offers the possibility of installing a gas scrubber on the upper part.
  • the design of the ceiling-side part of the work space in the form of a tapered shaft ensures that the air rising through the thermal and collecting on the ceiling is collected in the shaft and inwards at the lower edge of the shaft to the suction slot between the Baffle plate and the ceiling of the fume cupboard is deflected back. This prevents the emergence of pollutants when the sliding window is open or when the sliding window is opened during work.
  • the fume hood according to the invention meets the requirements of DIN 1292471 due to this design with and without thermal.
  • the embodiment of the fume hood according to the invention shown in Fig. 2 consists essentially of a box-shaped housing in which a work space 17 is provided, which is delimited by a floor or table top 1, sides, a rear wall 2 and a ceiling 5 to 8.
  • the front of the housing is open and accessible via a vertically displaceable sliding window 4, which can be displaced into a position that closes the opening and a position that opens the opening.
  • a baffle plate 10 is removably arranged in two brackets 11, 12, which runs obliquely from bottom to top and from back to front in the illustrated embodiment.
  • This baffle plate 10 serves to lower the gases or vapors that arise when working on the table top 1 and rise due to the thermal effects and to guide the upper suction slot 21, 22, which are limited between the lower edge and the upper edge of the baffle plate 10 and the rear wall 2 or the ceiling 7 of the interior.
  • the space 20 between the baffle plate 10 and the ceiling parts 5 and 6 thus forms a vacuum chamber 20 which is connected to the working space 17 via the slots 21, 22.
  • the respective amounts of exhaust air can be regulated via the width of these slots.
  • the exhaust air sucked into the scrubber 14 via the nozzle 13 from the vacuum chamber 20 is discharged from the scrubber 14 via a nozzle 16 to a house ventilation.
  • the baffle plate 10 forms together with the ceiling, in particular the ceiling part 7 and the ceiling part 8 in the form of a cladding sheet, which runs between the front edge of the ceiling part 7 and the upper edge of the opening of the open front of the housing, an upwardly tapering shaft in the upper part of the Working space 17.
  • This shaft can be trapezoidal in cross-section, as is the case with the embodiment shown in the drawing, but it can also have an arched or hood-like shape.
  • the suction slot 22 between the baffle plate 10 and the ceiling part 7 is arranged at the narrowest point of the shaft, so that there the suction is very intense.
  • the size of the suction slots 21, 22 is preferably selected so that 40% of the exhaust air is extracted at the suction slot 21 and 60% at the suction slot 22. This differs from the standard setting for the so-called roller deductions, in which 66% is extracted at the lower slot, while 33% is extracted at the upper slot. This deviation is due to the fact that a rapid suction must be achieved due to the thermals on the upper part.
  • the ceiling part 8, ie the cladding sheet can be made transparent and can be provided with lighting 9 located on the front.
  • the Lower edge of the cladding sheet 8 which extends obliquely forward from the ceiling to the upper edge of the opening in the front of the housing, ie in the area of the upper edge of the opening on the front of the housing, a so-called deflector plate 24 is provided, which extends from the lower edge of the Covering sheet 8 extends inwards.
  • This deflector plate 24 can also be transparent.
  • the deflector plate 24 serves as a guide plate which deflects the air collected in the upper shaft-shaped part inwards, an effect which can be reinforced by a correspondingly profiled design of the lower edge of the sliding window, which then performs a similar function when the sliding window is open.
  • a seal 15b is provided between the front 15a of the fume cupboard and the sliding window 4, which can be made of a soft material, for example a soft brush that extends across the entire width of the front 15a .
  • This seal 15b closes the structurally necessary gap between the front 15a and the sliding window 4, in which otherwise due to the high temperature difference between the inside, i.e. gases could flow into the work area and the outside area.
  • the inside of the sliding window 4 is covered with the glass pane of the sliding window. This protects the metal frame from corrosion by the smoked gases and ensures a good seal due to smooth surfaces.
  • Such a fume hood therefore allows you to work with a half-open sliding window, quickly discharge the vapors to the rear, collect the thermals in the shaft, install the washer above the work area, drain the condensate on the inclined baffle plate, and quickly extract the thermals from the highest point in the shaft as well as easy access for cleaning purposes on all edges or avoids dead corners.
  • the hot gases can be in the shaft 17a in the upper region of the work space collected, which pull up due to the thermal.
  • the shaft 17a thus reliably prevents gases from escaping even when the sliding window 4 is open.
  • the baffle plate 10 When the sliding window 4 is fully open, the baffle plate 10 can be removed from the brackets 11 and 12. Then the vacuum chamber 20 and the baffle plate 10 can be cleaned.

Landscapes

  • Ventilation (AREA)
  • Devices For Use In Laboratory Experiments (AREA)
  • Prevention Of Fouling (AREA)
  • Percussion Or Vibration Massage (AREA)

Claims (7)

  1. Hotte d'évacuation de fumées, comprenant:
    - une enveloppe en forme de caisson qui délimite intérieurement une chambre de travail (17) ouverte sur le côté avant et au-dessus de laquelle un dispositif de lavage de gaz (14) est prévu dans l'enveloppe, ce dispositif étant relié à l'ouverture d'aspiration de la chambre de travail,
    - un dispositif d'aspiration qui est relié à la chambre de travail (17) par l'intermédiaire de l'ouverture d'aspiration et du dispositif de lavage de gaz,
    - une plaque déflectrice (10) qui est disposée dans la chambre de travail (17) devant l'ouverture d'aspiration, obliquement de bas en haut et de l'arrière vers l'avant, des fentes d'aspiration (21, 22) étant formées entre le bord inférieur de cette plaque et la paroi arrière (2) de l'enveloppe ainsi qu'entre le bord supérieur de la plaque et le plafond de l'enveloppe, et
    - une fenêtre coulissante qui est montée verticalement coulissante le long du côté avant ouvert de la chambre de travail (17), entre une position ouverte et une position fermée,
       caractérisée en ce que la partie supérieure (17a) de la chambre de travail (17) est réalisée sous la forme d'un entonnoir (10, 7, 8) se retrécissant vers le haut et qui est constitué d'une partie de la plaque déflectrice (10), d'une partie de plafond (7) se raccordant à celle-ci en direction du côté avant, et d'une autre partie de plafond (8) qui s'étend entre le bord avant de la partie de plafond (7) et le bord supérieur (15) de l'ouverture du côté avant ouvert de l'enveloppe, une partie de plafond (6) qui se raccorde au bord arrière de la partie de plafond (7) s'étendant obliquement de haut en bas et de l'avant vers l'arrière, et une chambre à dépression (20) reliée par des fentes (21, 22) à la chambre de travail étant formée entre la partie de plafond (6) s'étendant obliquement et la face arrière de la plaque déflectrice (10).
  2. Hotte suivant la revendication 1, caractérisée en ce qu'une plaque déflectrice (24) dirigée vers l'intérieur dans la chambre de travail est disposée le long du bord avant de l'autre partie de plafond (8).
  3. Hotte suivant la revendication 1 ou 2, caractérisée en ce qu'une baguette (4b) formant poignée, profilée, est prévue le long du bord inférieur de la fenêtre coulissante (4).
  4. Hotte suivant l'une des revendications précédentes, caractérisée en ce que la plaque déflectrice (10) est montée amovible dans des supports (11, 12).
  5. Hotte suivant l'une des revendications précédentes, caractérisée en ce que l'intervalle existant entre le côté avant (15a) de la hotte et la fenêtre coulissante (4) est fermé par un joint d'étanchéité (15b).
  6. Hotte suivant l'une des revendications précédentes, caractérisée en ce que les fentes (21, 22) sont dimensionnées de façon que 60% de l'air évacué soit aspiré dans l'entonnoir (10, 7, 8) et dans la fente supérieure (22) et que 40% de cet air soit aspiré dans la fente inférieure (21).
  7. Hotte suivant l'une des revendications précédentes, caractérisée en ce que la face intérieure de la fenêtre coulissante (4) est stratifiée contre la vitre de la fenêtre.
EP91119551A 1990-12-19 1991-11-15 Hotte de laboratoire Expired - Lifetime EP0491166B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4040723A DE4040723C2 (de) 1990-12-19 1990-12-19 Abrauchabzug
DE4040723 1990-12-19

Publications (2)

Publication Number Publication Date
EP0491166A1 EP0491166A1 (fr) 1992-06-24
EP0491166B1 true EP0491166B1 (fr) 1995-06-28

Family

ID=6420765

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91119551A Expired - Lifetime EP0491166B1 (fr) 1990-12-19 1991-11-15 Hotte de laboratoire

Country Status (3)

Country Link
EP (1) EP0491166B1 (fr)
AT (1) ATE124303T1 (fr)
DE (2) DE4040723C2 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10107371A1 (de) * 2001-02-16 2002-09-05 Waldner Labor & Schuleinrichtungen Gmbh Mobiler Abzug
DE10158677C1 (de) * 2001-11-30 2003-06-18 Caspar & Co Labora Gmbh Aachen Abrauchabzug
DE102010051364A1 (de) * 2010-11-13 2012-05-16 Waldner Laboreinrichtungen Gmbh & Co. Kg Abzugvorrichtung
CN104075361B (zh) * 2014-07-28 2016-05-11 浙江奥田电器有限公司 自动风门吸油烟机罩及其所应用的吸油烟机
DE102015201026B3 (de) * 2015-01-22 2016-06-16 Konrad Kreuzer Abzugsvorrichtung mit geregelter Absaugeinrichtung
CN104633743B (zh) * 2015-02-06 2017-09-12 杭州德意电器股份有限公司 一种带有电机的吸油烟机
CN108114961A (zh) * 2016-11-26 2018-06-05 北京成威博瑞实验室设备有限公司 导流系统以及带有导流系统的通风柜
DE102020129412A1 (de) 2020-11-09 2022-05-12 Lab-Concept GmbH Abzugsvorrichtung mit Volumenstromregelung

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2779265A (en) * 1956-05-08 1957-01-29 John M Liptay Fume hood
DE1154920B (de) * 1960-11-26 1963-09-26 Svenska Flaektfabriken Ab Vorrichtung an Abzuegen, Rauchgasabzuegen und aehnlichen geschlossenen, mit eigenem Lueftungssystem versehenen Raeumen in Laboratorien und aehnlichen Arbeitsraeumen
FR1343722A (fr) * 1962-10-11 1963-11-22 Commissariat Energie Atomique Sorbonne à débit constant
US3217630A (en) * 1963-02-20 1965-11-16 Hamilton Mfg Co Fume hood construction
US3340788A (en) * 1966-02-28 1967-09-12 Lab Construction Company Fume hood including air deflecting baffle
US3942421A (en) * 1974-11-18 1976-03-09 American Hospital Supply Corporation Seal strips for fume hoods
DE2917853C2 (de) * 1979-05-03 1983-09-29 Heinrich Ing.(grad.) 5205 St. Augustin Hilbers Gasabzugschrank für chemische Laborarbeiten o.ä.
US4528898A (en) * 1984-03-05 1985-07-16 Imec Corporation Fume hood controller
NL8501661A (nl) * 1985-06-06 1987-01-02 Vinitex Laboratoriuminrichting Zuurkast.
CH670878A5 (en) * 1986-01-21 1989-07-14 Karl Babberger Laboratory fume extraction appts. - has internal baffle plates above front inlet, forming circulating and extraction spaces to reduce heat loss
DE8801798U1 (de) * 1988-02-12 1988-04-07 Hohenloher Spezialmöbelwerk Schaffitzel GmbH & Co, 7110 Öhringen Abzug für ein Labor

Also Published As

Publication number Publication date
EP0491166A1 (fr) 1992-06-24
ATE124303T1 (de) 1995-07-15
DE4040723A1 (de) 1992-06-25
DE59105867D1 (de) 1995-08-03
DE4040723C2 (de) 1996-01-25

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