EP0517258A1 - Abzug - Google Patents

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Publication number
EP0517258A1
EP0517258A1 EP92109566A EP92109566A EP0517258A1 EP 0517258 A1 EP0517258 A1 EP 0517258A1 EP 92109566 A EP92109566 A EP 92109566A EP 92109566 A EP92109566 A EP 92109566A EP 0517258 A1 EP0517258 A1 EP 0517258A1
Authority
EP
European Patent Office
Prior art keywords
air guide
shaft
air
rear wall
slots
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.)
Withdrawn
Application number
EP92109566A
Other languages
German (de)
English (en)
French (fr)
Inventor
Peter Becker
Thorsten Knauf
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 EP0517258A1 publication Critical patent/EP0517258A1/de
Withdrawn legal-status Critical Current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 trigger according to the preamble of claim 1.
  • the object of the invention is to create a deduction of the type mentioned, in which cross flows are avoided and which manages with significantly smaller amounts of air.
  • the fume cupboard has a bottom 1, a rear wall 2, side walls 33, a ceiling 3 and on the front defining or closing a work opening or releasing a sliding window or a sliding door 5 which extends vertically can be pushed up and is multi-part at the appropriate height.
  • a sliding window or a sliding door 5 which extends vertically can be pushed up and is multi-part at the appropriate height.
  • horizontally moving sliding doors or flaps can also be used.
  • an air baffle which consists of a lower air baffle 6, an upper air baffle 7 adjoining it at the top and a highly inclined baffle plate 8 adjoining the latter at the top.
  • An upper horizontal suction slot 22 is formed between the upper edge of the baffle plate 8 and the ceiling 3 of the fume cupboard.
  • a lower horizontal suction slot 20 is determined by the lower edge of the lower air guide plate 6 and the rear wall 2 or the bottom 1 of the fume cupboard.
  • a middle horizontal exhaust slot 21 is formed between the lower air guide plate 6 and the upper air guide plate 7.
  • This middle horizontal suction slot 21 is preferably at the level of the sliding window or sliding door lower edge when the window or door is fully open.
  • Vertical slots are formed between the lower and upper air guide plates 6, 7 on the one hand and the side walls 33 of the trigger on the other hand, the slots 23 and 24 between the lower air guide plate 6 and the side walls 33 of the trigger being wider than the slots 25 and 26 between the Upper air guide plate 7 and the side walls 33 of the fume cupboard.
  • the air guide plate is also inclined in the parts lower air guide plate 6 and upper air guide plate 7 relative to the rear wall 2 in such a way that the distance between the air guide plate and the rear wall decreases from top to bottom.
  • a shaft is formed by three guide shafts 9, 10 which are inclined with respect to the vertical and extend between the air guide wall and the rear wall of the fume cupboard and run in three adjacent shafts. 2) the left shaft 30, the middle shaft 31 and the right shaft 32, each divided.
  • the inclination of the two guide strips 9 and 10 is such that they move away from each other from top to bottom, symmetrically to the perpendicular.
  • the lower air guide wall 6 has two vertical slots 27 and 28, which are symmetrical to the center and extend over part of the height of the air guide wall 6 and which extend from the lower edge of the lower air guide plate 6.
  • the two slots it would also be possible to provide a single central slot of a correspondingly greater width or also hole arrangements which extend over a certain height of the lower air guide wall 6 and are symmetrical to the center.
  • the slots 27 and 28 do not have to extend through to the lower edge of the air guide plate 6.
  • the slope of the air baffle 6, 7 is approximately 1.5 °.
  • the usual upper horizontal slot 22 is used for suction of light gases as well as for suction in strong thermals and for thinning the upper air roller that is being formed.
  • the middle horizontal slot 21 serves to drive the air roller. It is expedient to arrange it so that it is at the level of the lower edge of the fully open sliding window or the fully open sliding door 5.
  • the usual lower horizontal slot 20 is used to extract heavy gases.
  • the lateral vertical slots 23, 25, 24, 26 are selected so that they counteract the dead zones caused by the guides of the sliding window or sliding door 5 or the backflow points due to the change in direction (the inflow is horizontal, the suction vertical). These slots are to be routed in such a way that there is even vacuum control over the entire length of the slot. Otherwise, different speeds create uncontrolled vortex areas. It has been found to be advantageous to make the slots behind the sliding window or sliding door 5 relatively large where there is a flow reversal and to reduce them above the sliding window or sliding door.
  • the lower lateral vertical slots 23 and 24 are preferably three to four times wider than the upper lateral vertical slots 25 and 26.
  • the middle vertical slots 27, 28 are provided because otherwise due to the conditions in the cross sections or slots of the three shafts 30, 31 and 32 would result in excessive suction of the outer shafts 30 and 32. With the help of the middle suction slots 27, 28, the free suction area of the middle shaft can be increased so that the total volume is increased to about 30% of the total exhaust air volume flow due to the lower pressure loss.

Landscapes

  • Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
  • Air-Flow Control Members (AREA)
EP92109566A 1991-06-05 1992-06-05 Abzug Withdrawn EP0517258A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19914118495 DE4118495A1 (de) 1991-06-05 1991-06-05 Abzug
DE4118495 1991-06-05

Publications (1)

Publication Number Publication Date
EP0517258A1 true EP0517258A1 (de) 1992-12-09

Family

ID=6433252

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92109566A Withdrawn EP0517258A1 (de) 1991-06-05 1992-06-05 Abzug

Country Status (2)

Country Link
EP (1) EP0517258A1 (enrdf_load_stackoverflow)
DE (1) DE4118495A1 (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1477241A3 (de) * 2003-05-14 2005-08-31 GfP (Gesellschaft für Produktivitätsplanung und Produktentwicklung)mbH Tischabzug für ein Labor oder dergleichen
CN115007590A (zh) * 2022-06-17 2022-09-06 倚世节能科技（上海）有限公司 一种通风柜

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10338287C5 (de) * 2002-08-20 2008-10-09 E. Renggli Ag Abzug

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1438343A (fr) * 1965-03-12 1966-05-13 Teclab Dispositif de ventilation pour sorbonnes
US4632022A (en) * 1985-02-25 1986-12-30 St. Charles Manufacturing Co. Fume hood fabricated from modules and having laterally extending exhaust ports
DE9015801U1 (de) * 1990-11-19 1991-02-21 Waldner Laboreinrichtungen GmbH & Co, 7988 Wangen Abzug mit Einströmprofil

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1139972A (en) * 1966-01-18 1969-01-15 Baird & Tatlock Ltd Improvements relating to fume extraction apparatus
GB2064100B (en) * 1979-11-28 1984-02-15 Jennings H G F Fume cupboard
DE3939063A1 (de) * 1989-11-25 1991-05-29 Wolfferts Gmbh & Co Kg J Prozessraum, insbesondere abzug fuer den laborbetrieb

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1438343A (fr) * 1965-03-12 1966-05-13 Teclab Dispositif de ventilation pour sorbonnes
US4632022A (en) * 1985-02-25 1986-12-30 St. Charles Manufacturing Co. Fume hood fabricated from modules and having laterally extending exhaust ports
DE9015801U1 (de) * 1990-11-19 1991-02-21 Waldner Laboreinrichtungen GmbH & Co, 7988 Wangen Abzug mit Einströmprofil

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1477241A3 (de) * 2003-05-14 2005-08-31 GfP (Gesellschaft für Produktivitätsplanung und Produktentwicklung)mbH Tischabzug für ein Labor oder dergleichen
CN115007590A (zh) * 2022-06-17 2022-09-06 倚世节能科技（上海）有限公司 一种通风柜
CN115007590B (zh) * 2022-06-17 2023-11-10 倚世节能科技（上海）有限公司 一种通风柜

Also Published As

Publication number Publication date
DE4118495A1 (de) 1992-12-10
DE4118495C2 (enrdf_load_stackoverflow) 1993-03-18

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Designated state(s): AT BE CH DE ES FR GB IT LI NL

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Effective date: 19940620

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18D Application deemed to be withdrawn

Effective date: 19941129