EP1444057B1 - Hotte fermee - Google Patents

Hotte fermee Download PDF

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Publication number
EP1444057B1
EP1444057B1 EP02754996A EP02754996A EP1444057B1 EP 1444057 B1 EP1444057 B1 EP 1444057B1 EP 02754996 A EP02754996 A EP 02754996A EP 02754996 A EP02754996 A EP 02754996A EP 1444057 B1 EP1444057 B1 EP 1444057B1
Authority
EP
European Patent Office
Prior art keywords
air
fume cupboard
working chamber
cupboard according
side walls
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
EP02754996A
Other languages
German (de)
English (en)
Other versions
EP1444057B8 (fr
EP1444057A1 (fr
Inventor
Ulrich Gärtner
Jürgen Liebsch
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
Waldner Laboreinrichtungen GmbH and Co KG
Original Assignee
Waldner Laboreinrichtungen GmbH and Co
Waldner Laboreinrichtungen GmbH and Co KG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7699441&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1444057(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Waldner Laboreinrichtungen GmbH and Co, Waldner Laboreinrichtungen GmbH and Co KG filed Critical Waldner Laboreinrichtungen GmbH and Co
Publication of EP1444057A1 publication Critical patent/EP1444057A1/fr
Application granted granted Critical
Publication of EP1444057B1 publication Critical patent/EP1444057B1/fr
Publication of EP1444057B8 publication Critical patent/EP1444057B8/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2215/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
    • B08B2215/003—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area with the assistance of blowing nozzles

Definitions

  • the invention relates to a trigger with a housing in which there is a working space which is open on one side.
  • US 3,747,505 discloses a trigger that outputs compressed air jets in the area of the front edge of the worktop and in the region of the side walls.
  • the air jets emitted in the area of the side walls are free jets that form an air curtain intended to prevent the escape of toxic vapors from the working space due to existing backflow in the area of the side walls.
  • GB 2064100A discloses a generic deduction, in which compressed air jets are issued through an opening in the worktop in the form of directed upward and to the left directional free jets in the deduction interior.
  • US 5,924,920 and GB 2336667A reveal a trigger with a arranged at a distance from the front edge of the worktop baffle and arranged at a distance from the side post baffle. Room air is sucked into the working space through the respectively provided gap.
  • the object underlying the invention is therefore to provide a trigger of the type mentioned in such a way that an accumulation of pollutants on the side walls and the bottom of the working space in the housing is avoided.
  • This object is achieved according to the invention by arranged on the open side of the working space facilities that emit fresh air jets at an acute angle to the inner surface of the housing side walls and the housing bottom surface in the housing interior.
  • the in Fig. 1 shown deduction consists of a housing 1 with a bottom or a table top 2, which encloses the working space 3 of the trigger on all sides except for a closable by a sliding window 9 opening.
  • Baffle 4 extends over the rear wall of the trigger in the working space 3. Between the baffle 4 and housing walls openings 5a, b, c and d are provided and located behind the baffle 4 chamber is sucked off via a collecting channel 6, which is connected to an exhaust system 7 ,
  • the side posts of the housing 1 of the trigger are designed as aerodynamically shaped aluminum posts 8, preferably as aircraft wing-like profile part with forward facing inflow, wherein the sliding window 9 has a correspondingly flow-shaped Einströmprofilteil 10.
  • the front edge of the table top 2 also consists of a flow-shaped inflow profile 11, which may also be an aircraft wing-like profile part with forward facing inflow.
  • a Zu Kunststoffstutzen 12 is arranged, from the supply air in the trigger, that is blown into the working space 3.
  • This supply air can come from the outside or from an on-site supply air network.
  • the amounts of injected air are controlled by a regulator 13, which consists of a differential pressure or flow sensor, a control valve, a motor and a central electronic control unit, blown into a distribution collection channel 14 and introduced through a Zu Kunststoffdüse 15 in the working space 3, the a chamber bounded by the surface portions 16 and 16a.
  • a deflection profiles 17, which direct a free jet 18 inwardly into the working space 3 of the trigger In the lower region of the chamber, which is formed like a nozzle, there are deflection profiles 17, which direct a free jet 18 inwardly into the working space 3 of the trigger.
  • the inflow 11 is formed at the front edge of the table top 2 so that on both sides in each case an air jet 22 is blown obliquely at an acute angle to the bottom surface in the housing interior such that this air jet 22nd is deflected by the incoming air to the table top and along the table top to the opening 5b between the baffle 4 and the back of the trigger along.
  • the profile parts of the side posts 8 are formed so that they output support jets 21 in the housing interior, which are also blown at an acute angle to the inner surfaces of the side walls of the housing.
  • Fig. 2 which is a sectional view of the trigger along the line AA in Fig. 1 shows the course of the air jets 21, 22 in detail. That is, from the tread part forming the side posts 8, air jets 21 emerge at an acute angle to the inner surfaces of the side walls which are applied to the side walls by the inflowing air and pass into the exhaust ports 5d and 5e. In addition, from the leading edge profile 11, a supply air veil formed from a plurality of air jets 22 flows over the table top 2.
  • Fig. 3 shows the table top 2 and the inflow 11 at its front edge in detail.
  • the profile part 11 is formed as a hollow profile and flows through an air port 24 air in the profile part 11. This air escapes through milling 23, for example in the form of slots or nozzles such that einblasender at an acute angle into the interior of the trigger Air jet 22 is formed, which rests against the surface of the table top 2.
  • Fig. 4 shows accordingly a profile of the side posts 8, which is also formed as a hollow chamber profile. Air flowing through an opening or nozzle 26 at an acute angle in the working space 3 of the trigger, then applies to the inner surface of the side part 27 at.
  • the means for generating the additional air jets 21, 22 may be provided at a distance from the Profilanströmseite or directly behind the Profilanströmseite the profile parts 8, 11.
  • Fig. 5 shows the upper area of the trigger and in particular the Zu Kunststoff Surprise. As it is in Fig. 5 is shown, the supply air via a supply fan or another fan, is divided by a pressure chamber 28 and is blown through a nozzle as a free steel 18 in the working space 3 of the trigger, which consists of the sides of the housing and the two parts 16 and 16a of the already mentioned Chamber exists.
  • deflection profiles 17 are provided, which are formed so that the free-steel is first curved by the nozzle and then deflected inwards, so that it flows together with the impulse from the outside. Air at an angle of 45 ° to the vertical flows inward into the working space 3 of the trigger. This supply air combines with the air flowing into the working space 3 from the outside.
  • Fig. ' 6A and 6B show the effect of the air jets 22 in detail. The same applies to the air jets 21st
  • Fig. 6A shows that the incoming air 30 abuts the Einströmprofil at the front edge of the table top 2 but does not approach the table top surface, so that there is a backflow 31, flows into the air from the interior of the working space 3 of the trigger to the tear-off edge and in the This can accumulate pollutants.
  • This training has particular in the work with heavy gases have the advantage that they sink to the surface of the table top and disappear through the backward flow component directly to the lower suction opening 5b of the working space 3.
  • Possible dimensions of the two lateral air jets 21 are such that they make up about 15 to 20 m 3 / h.
  • the lower air jet 22 has an air volume of 10 m 3 / h per 1fd. Meter.
  • the air speed is 2m per second.
  • the deflection angle of the air jets 21, 22 is preferably about 20 °, so that they flow at an acute angle to the inner surfaces in the working space 3.
  • the upper free jet 18 on the deflection profile 17 is not hinged to a wall, but blown in the form of a free jet in front of the room. He therefore requires a much higher air flow of about 100 to 150 m 3 / h per running meter deduction width.
  • a fume hood with a width of 1,500 mm therefore has a free jet of 150 m 3 / h and wall blasting of about 50 to 60 m 3 / h.
  • the training is such that when the sash open the trigger sucks 900 m 3 / h and all wall and support beams are generated.
  • the free jet 18 When closing the sliding window 9, the free jet 18 is switched off at the deflection profile 17, so that the trigger can be lowered with the sliding window closed to about 150 m 3 / h air requirement. It is therefore recommended operate the trigger with a control that measures the position of the vertical sliding window 9. Opens the vertical sliding window 9 by more than 50% then the free jet 18 is turned on the deflection profile 17. The same applies even if the horizontal sliding window of the trigger opens more than 10 to 20 mm. Otherwise the free jet 18 is switched off.
  • the wall jets 21, 22 may be switched off, so that the trigger can be driven depending on the needs always with a small amount of air, which is a clear advantage over a conventional veil trigger.
  • the exhaust air amount is then 100 m 3 / h.
  • the support beams Since the support beams have a significant influence on the function of the trigger, they must be continuously tested and monitored in the course of the required monitoring of the ventilation function of the trigger. This monitoring can be carried out with a differential pressure sensor in the overpressure area of the injection. In case of malfunction, an alarm is issued.
  • the above-described embodiment of the trigger according to the invention shows a high stability with respect to a lateral or oblique flow, in that a dead space area on the take-off surfaces or on the trigger slides is prevented. It is also taken care of for a very good extraction of heavy gases, as these fall to the table top 2 and are blown through the additional air jet 22 in the opening 5b.
  • the free jet 18 on the deflection profile 17 ensures that light gases which form in the working space 3 above above this support jet 18 are reliably held in the upper area of the fume hood and do not contaminate the lower working area can.
  • the inventive construction are generated in the additional air jets 21, 22, 18, with the trigger control be linked so that the trigger can be operated with the least possible amount of air.

Landscapes

  • Ventilation (AREA)
  • Devices For Use In Laboratory Experiments (AREA)
  • Centrifugal Separators (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Duct Arrangements (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
  • Air-Flow Control Members (AREA)

Claims (13)

  1. Hotte fermée avec une enceinte (1), dans laquelle se trouve une chambre de travail (3), qui est ouverte d'un côté et qui est délimitée du côté du fond par une plaque de table (2) et latéralement par des parois latérales (27), et des dispositifs (8, 11) disposés respectivement sur le bord avant de la plaque de table (2) et des parois latérales (27), qui envoient des jets d'air (21, 22) dans la chambre de travail (3) de telle manière que les jets d'air (21, 22) pénètrent dans la chambre de travail (3) sous un angle aigu par rapport aux faces intérieures de la plaque de table (2) et des parois latérales (27), caractérisée en ce que les dispositifs se présentent sous la forme de pièces profilées d'écoulement creuses (8, 11) avec une face d'approche dirigée vers l'avant à partir de la chambre de travail (3) et présentent des ouvertures, à travers lesquelles les jets d'air (21, 22) sont envoyés dans la chambre de travail (3), et en ce que l'espace intérieur des pièces profilées d'écoulement (8, 11) est relié à une alimentation en air et les jets d'air (21, 22) constitués d'air comprimé sont envoyés sous la forme de jets de fond et de jets de paroi qui circulent le long du fond et des parois latérales, évitant ainsi une accumulation de substances toxiques sur les faces intérieures de la plaque de table (2) et des parois latérales (27) à l'intérieur de la chambre de travail (3).
  2. Hotte fermée selon la revendication 1, caractérisée en ce que les pièces profilées d'écoulement (8, 11) sont prévues sur toute la longueur du bord avant de la plaque de table (2) et des parois latérales (27), par lesquelles la chambre de travail (3) est ouverte.
  3. Hotte fermée selon la revendication 1 ou 2, caractérisée en ce que les ouvertures se présentent sous la forme de buses.
  4. Hotte fermée selon la revendication 1 ou 2, caractérisée en ce que les ouvertures se présentent sous la forme de fentes.
  5. Hotte fermée selon l'une quelconque des revendications précédentes, caractérisée en ce que l'angle aigu vaut environ 20°.
  6. Hotte fermée selon l'une quelconque des revendications précédentes, caractérisée en ce qu'il est prévu une fenêtre coulissante verticale (9) sur le côté ouvert et il est prévu un dispositif à jet libre (12) destiné à produire un jet libre (18), qui est dévié à l'intérieur de la chambre de travail au moyen d'un profilé de déviation (17).
  7. Hotte fermée selon la revendication 6, caractérisée en ce qu'il est prévu un profilé d'écoulement (10) sur le bord inférieur de la fenêtre coulissante (9).
  8. Hotte fermée selon la revendication 6 ou 7, caractérisée en ce que le jet libre (18) peut être activé et désactivé en fonction de la position de la fenêtre coulissante (9).
  9. Hotte fermée selon l'une quelconque des revendications précédentes, caractérisée en ce que les jets d'air (21, 22) sont produits par un ventilateur commun avec un débit d'air de 10 à 15 m3/h.
  10. Hotte fermée selon l'une quelconque des revendications précédentes, caractérisée par une paroi d'impact (4), qui s'étend dans la chambre de travail devant la paroi arrière de la hotte fermée et qui est configurée de telle manière que les jets d'air (21, 22), qui s'écoulent le long des parois latérales (27) et de la plaque de table (2), soient aspirés directement entre la paroi d'impact (4) et les parois latérales environnantes (27) et la plaque de table (2).
  11. Hotte fermée selon la revendication 6, caractérisée en ce que le jet libre est formé par de l'air provenant d'un réseau de distribution d'air ou par de l'air fourni par un ventilateur à partir de l'atmosphère ambiante.
  12. Hotte fermée selon l'une quelconque des revendications précédentes, caractérisée par une régulation de l'air, qui inclut tous les jets d'air.
  13. Hotte fermée selon l'une quelconque des revendications précédentes, caractérisée par un dispositif de surveillance, qui surveille l'insufflation d'air distribué par les jets d'air.
EP02754996A 2001-09-18 2002-08-14 Hotte fermee Expired - Lifetime EP1444057B8 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10146000 2001-09-18
DE10146000A DE10146000A1 (de) 2001-09-18 2001-09-18 Abzug
PCT/EP2002/009141 WO2003024631A1 (fr) 2001-09-18 2002-08-14 Hotte fermee

Publications (3)

Publication Number Publication Date
EP1444057A1 EP1444057A1 (fr) 2004-08-11
EP1444057B1 true EP1444057B1 (fr) 2011-07-06
EP1444057B8 EP1444057B8 (fr) 2011-11-23

Family

ID=7699441

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02754996A Expired - Lifetime EP1444057B8 (fr) 2001-09-18 2002-08-14 Hotte fermee

Country Status (14)

Country Link
US (1) US9266154B2 (fr)
EP (1) EP1444057B8 (fr)
JP (2) JP4189318B2 (fr)
CN (1) CN1287914C (fr)
AT (1) ATE515333T1 (fr)
AU (1) AU2002321305B2 (fr)
CA (1) CA2454280C (fr)
DE (1) DE10146000A1 (fr)
DK (1) DK1444057T3 (fr)
ES (1) ES2364748T3 (fr)
HK (1) HK1072394A1 (fr)
MX (1) MXPA04002463A (fr)
PT (1) PT1444057E (fr)
WO (1) WO2003024631A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012105132A1 (de) 2012-06-13 2013-12-19 Waldner Laboreinrichtungen Gmbh & Co. Kg Abzug für hohe thermische Lasten
DE102013215667A1 (de) 2013-08-08 2015-02-12 Konrad Kreuzer Absaugvorrichtung
WO2018122302A1 (fr) 2016-12-29 2018-07-05 Waldner Laboreinrichtungen Gmbh & Co. Kg Sorbonne de laboratoire à jets de paroi
WO2018122304A1 (fr) 2016-12-29 2018-07-05 Waldner Laboreinrichtungen Gmbh & Co. Kg Sorbonne présentant un guidage des jets en paroi
DE102020132826B3 (de) 2020-12-09 2022-05-25 Waldner Laboreinrichtungen Gmbh & Co. Kg Laborabzug mit Strömungsgeräuschreduzierung

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TWI609155B (zh) * 2016-07-20 2017-12-21 建準電機工業股份有限公司 氣簾產生裝置
CN107159674A (zh) * 2017-05-31 2017-09-15 四川奥恒环保科技有限公司 一种吸除铁屑的除尘装置
DE202018103446U1 (de) * 2018-06-19 2018-06-25 Düperthal Sicherheitstechnik Gmbh & Co. Kg Sicherheitsschrank
CN110201964B (zh) * 2019-06-24 2024-05-10 北京成威博瑞实验室设备有限公司 实验室通风柜
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012105132A1 (de) 2012-06-13 2013-12-19 Waldner Laboreinrichtungen Gmbh & Co. Kg Abzug für hohe thermische Lasten
DE102013215667A1 (de) 2013-08-08 2015-02-12 Konrad Kreuzer Absaugvorrichtung
DE102013215667B4 (de) * 2013-08-08 2018-02-01 Konrad Kreuzer Absaugvorrichtung
WO2018122302A1 (fr) 2016-12-29 2018-07-05 Waldner Laboreinrichtungen Gmbh & Co. Kg Sorbonne de laboratoire à jets de paroi
WO2018122304A1 (fr) 2016-12-29 2018-07-05 Waldner Laboreinrichtungen Gmbh & Co. Kg Sorbonne présentant un guidage des jets en paroi
DE102016125890A1 (de) 2016-12-29 2018-07-05 Waldner Laboreinrichtungen Gmbh & Co. Kg Laborabzug mit Wandstrahlen
DE102016125891A1 (de) 2016-12-29 2018-07-05 Waldner Laboreinrichtungen Gmbh & Co. Kg Laborabzug mit geführten Wandstrahlen
DE102020132826B3 (de) 2020-12-09 2022-05-25 Waldner Laboreinrichtungen Gmbh & Co. Kg Laborabzug mit Strömungsgeräuschreduzierung

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JP4189318B2 (ja) 2008-12-03
MXPA04002463A (es) 2005-04-08
US20040242143A1 (en) 2004-12-02
DK1444057T3 (da) 2011-10-24
HK1072394A1 (en) 2005-08-26
PT1444057E (pt) 2011-09-13
ES2364748T3 (es) 2011-09-13
ATE515333T1 (de) 2011-07-15
CA2454280A1 (fr) 2003-03-27
JP2005502856A (ja) 2005-01-27
EP1444057B8 (fr) 2011-11-23
EP1444057A1 (fr) 2004-08-11
WO2003024631A1 (fr) 2003-03-27
CN1287914C (zh) 2006-12-06
AU2002321305B2 (en) 2007-10-04
CA2454280C (fr) 2010-10-19
JP2007212132A (ja) 2007-08-23
CN1555296A (zh) 2004-12-15
US9266154B2 (en) 2016-02-23
DE10146000A1 (de) 2003-01-16

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