EP1839766B1 - Détente dotée d'un orifice d'échappement de l'air frontal - Google Patents

Détente dotée d'un orifice d'échappement de l'air frontal Download PDF

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Publication number
EP1839766B1
EP1839766B1 EP07105369A EP07105369A EP1839766B1 EP 1839766 B1 EP1839766 B1 EP 1839766B1 EP 07105369 A EP07105369 A EP 07105369A EP 07105369 A EP07105369 A EP 07105369A EP 1839766 B1 EP1839766 B1 EP 1839766B1
Authority
EP
European Patent Office
Prior art keywords
exhaust
fume hood
opening
hood according
chamber
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
EP07105369A
Other languages
German (de)
English (en)
Other versions
EP1839766A1 (fr
Inventor
Frank Wesemann
Michael Schlegel
Jens SCHRÖDER
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.)
Wesemann & Co KG GmbH
Original Assignee
Wesemann & Co KG GmbH
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 Wesemann & Co KG GmbH filed Critical Wesemann & Co KG GmbH
Publication of EP1839766A1 publication Critical patent/EP1839766A1/fr
Application granted granted Critical
Publication of EP1839766B1 publication Critical patent/EP1839766B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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 with a trigger chamber having side walls, a closable actuating opening, a bottom and a cover, and having an exhaust port for sucking exhaust air from the discharge chamber, wherein the exhaust port is disposed adjacent to the cover of the actuating opening, and the Exhaust opening is assigned a facing away from the actuating opening directed guide element.
  • the operating opening must be accessible to an operator, so that experiments or process steps can be carried out in the drawing-off chamber.
  • pollutants must be removed from the actuation opening as quickly as possible and be reliably sucked off, so that a load on the operator is avoided as far as possible.
  • a disadvantage of the known prints is that in the interior of the discharge chamber generally forms a flow roll, so that on the one hand pollutants are quickly sucked from the region of the actuating opening into the interior of the drawing chamber. However, these pollutants are partially returned to the actuating opening by the roll flow under unfavorable conditions, so that an unwanted burden on the operator can occur due to this backflow.
  • the invention is based on the problem of specifying a deduction, with which can be removed quickly and reliably with low suction pollutants from the range of actuation opening, while a burden on an operator is avoided by possible from the interior of the discharge chamber to the actuating port pollutants.
  • the guide element guide means for guiding the exhaust air flow along the cover along.
  • the exhaust port is assigned a directed away from the actuating opening directed guide element.
  • the guide element may be funnel-shaped.
  • the guide element can be a formation of a complete flow roll largely suppress and support a reliable suction of pollutants in the front upper portion of the discharge chamber.
  • the guide element has guide means for guiding the exhaust air flow along the cover. In this way, the flow along the cover along can be largely accelerated, so that a good suction in the region of the actuation opening and at the same time a reliable removal of pollutants from the discharge chamber is effected.
  • a development of the invention is characterized in that the exhaust air opening is formed as an elongated exhaust air gap which extends over the width of the actuating opening.
  • Another development of the invention is characterized by an exhaust air distributor in a region of the cover facing away from the exhaust air opening.
  • an exhaust air distributor in a region of the cover facing away from the exhaust air opening.
  • Abluftleitsch are provided for guiding the exhaust air flow to other exhaust ports.
  • the triggering effect can be controlled and strengthened specifically.
  • the Abluftleitsch are in fluid communication with the exhaust manifold so that a good trigger effect is achieved.
  • the Abluftleitsch on a Abluftleitplatte which is arranged at a distance from the rear wall of the discharge chamber and forms with this a Abluftleitkanal.
  • the Ab povertyleitplatte may have in their, the ground adjacent area the other exhaust ports.
  • the Abluftleitplatte to form the other exhaust openings from the bottom ends.
  • the Abluftleitplatte has lateral recesses for forming the other exhaust ports. It is particularly advantageous if the further exhaust air openings are arranged in a U-shape.
  • flow-guiding means are provided for guiding the flow of air in the draw-off chamber.
  • the flow-guiding means can have flow-guiding elements in the rear region of the drawing-off chamber. In this way, the formation of the flow roller from the operating opening away and towards the exhaust port is supported particularly advantageous.
  • the flow guiding elements form installation channels with the side walls and the rear wall. Because this installations can be performed and arranged in these installation channels, so a particularly large volume of the discharge chamber can be achieved with given external dimensions. If the installation channels have a triangular cross-section, such a flow line of the flow roll inside the withdrawal chamber is favorably influenced.
  • the flow directors may also have supply ports for fluid media, electricity, and / or data lines. Especially when training as installation channels so results in a simple structure with good accessibility of the supply connections in the discharge chamber.
  • An advantageous embodiment also results from the fact that form the flow guide with the cover and the rear wall the exhaust manifold. This results in a simple structure with few components.
  • the flow guide elements have a spoiler in the region of the actuation opening for returning the air flow into the draw-off chamber.
  • a return line into the discharge chamber ie in the region of the flow roll in the interior, does not lead to suctioned pollutants away from the actuating opening and again to the exhaust port, so that a burden on an operator is avoided in front of the actuating opening.
  • the spoiler may be disposed adjacent to the sidewall of the actuation opening so as to avoid backflow to the operator.
  • a sash is provided for displacing the actuating opening.
  • the operating opening can be closed so far that handling in the interior of the drawing chamber by an operator is just possible, but the remaining opening of the actuating opening is kept as small as possible.
  • the spoiler can be arranged on the sash, so as to ensure even remaining residues of pollutants from the actuating opening and thus away from the operator back into the interior of the drawing chamber and thus into the flow roll back to the exhaust port.
  • the sash is formed in two parts and the spoiler arranged on the upper part. This is already happening early on the spoiler at the top of a backflow of possibly not extracted pollutants back into the flow roll and thus again guaranteed to the exhaust port. The remaining pollutant backflow to the actuation port is thus further reduced.
  • the fall arrester preferably has a gas pressure spring.
  • the fall protection can also have a pneumatic damper, which is adjustable in an advantageous development.
  • a gas spring or such a pneumatic damper as fall protection can be easily arranged and easily accessible for maintenance.
  • the fall arrester may be disposed adjacent the cover and the sash. In this way, the fall arrest is easily accessible by means of a ladder from the top front.
  • Yet another embodiment of the invention is characterized by a guide profile for the sash.
  • the guide profile has at least one guide groove and at least one further groove, wherein the further groove is closed to the outside with a low material thickness.
  • Such a guide profile reduces the storage costs for the items of the trigger.
  • the additional groove is not needed, the contamination of this additional groove is avoided by their closed design.
  • the closure can be easily removed with a low material thickness. For example, this predetermined breaking points can be provided so that the material can be easily pushed out.
  • a particularly advantageous development of the invention is characterized by a modular design.
  • a further development is characterized by a Z-profile held by frames, in which module elements can be suspended.
  • this Z-profile for example, a base cabinet, the bottom plate of the trigger chamber or other element of the trigger can be hung.
  • Fig. 1 shows a front view of a trigger 10 with the features of the invention in a schematic representation.
  • the trigger 10 has side walls 11, 12, between which an actuating opening for a trigger chamber in the interior of the trigger 10 is arranged.
  • the actuating opening can be closed by means of a sash 13.
  • the sash 13 is shown in an upper end position.
  • the sash 13 has two windows 14, 15 which can be moved horizontally in the embodiment shown, so that for operating a structure in the trigger chamber even with the sash closed 13 an operator after moving a window 14, 15 can reach into the trigger chamber.
  • the discharge chamber is bounded at the bottom by a plate 16 between the side walls 11, 12.
  • the plate 16 may be formed as a suitable table top 16 of a resistant material.
  • the table top 16 consists of a chipboard with a resistant coating.
  • an installation panel 17 Downwardly adjacent to the table top 16, an installation panel 17 is arranged, which carries a plurality of fittings 18. In the figure, for better clarity, only one fitting 18 is provided with a reference numeral. Fittings 18 may be for example taps, gas taps or switches for the exhaust air control. Under the installation panel 17, a lower cabinet 19 is arranged in the embodiment shown.
  • baffles 20, 21 are plate-shaped and arranged obliquely in the drawing chamber. As a result, the cross section of the discharge chamber tapers in the rear region.
  • the baffles 20, 21 also serve to receive sockets 22 and outlets 23.
  • the outlets 23 serve to provide water and other fluid media, such as process gases.
  • a guide plate 24 is arranged in the draw-off chamber, which adjoins the guide plates 20, 21 laterally.
  • the guide plate 24 has recesses 25, 26, so that in the lower region gaps in the region of the recesses 25, 26 between the guide plate 24 and the baffles 20, 21 remain.
  • the guide plate 24 also ends a distance from the table top 16 spaced so that a gap 27 remains between the table top 16 and the guide plate 24.
  • 24 stand rod holder 28 are arranged in the region of the guide plate. In the embodiment shown, six support rod holders 28 are provided. The support rod holders 28 serve in addition to the possibility of attachment for support rods also for fastening the guide plate 24 to a rear wall of the trigger 10, not shown in the figure.
  • Fig. 2 shows the section A - A of Fig. 1 ,
  • the trigger 10 has a take-off chamber 29.
  • a rear wall 30 arranged adjacently to the guide plate 24. Between the rear wall 30 and the guide plate 24 an exhaust air duct 31 is formed.
  • a guide plate 32 is provided which forms an exhaust manifold 33 together with the rear wall 30.
  • the exhaust manifold 33 communicates with an exhaust port 34, which is connectable to the top with an exhaust duct not shown in the figure.
  • the exhaust air manifold 33 is in fluid communication with the Abluftleitkanal 31 and a discharge chamber 29 arranged on the Abluftleitkanal 35 in fluid communication.
  • the withdrawal chamber 29 is bounded at the top by a cover 46 arranged below the exhaust air duct 35.
  • a cover 46 arranged below the exhaust air duct 35.
  • Abluftleitkanales 31 adjacent to an exhaust duct 36 is disposed in the region of the cover 46 and the actuating opening, which is in communication with the Ab povertyleitkanal 35.
  • the exhaust duct 36 has at its lower end a guide member 37 which leaves a funnel-like opening to the discharge chamber 29 opening of the exhaust duct 36.
  • the guide member 37 is formed as an elongated metal plate, wherein at the discharge chamber 29 facing the end of the guide member 37, a guide panel 38 is provided.
  • Fig. 3 shows an enlarged partial view of the front upper portion of the trigger 10 with the exhaust duct 36, the guide member 37 and the guide panel 38.
  • the guide member 37 and the guide panel 38 are integrally formed, wherein the guide panel 38 to the cover 46th is angled out.
  • the sash 13 is formed in two parts in the illustrated embodiment.
  • the sash 13 has an upper slide part 39 and a lower slide part with the windows 14, 15.
  • a spoiler 40 is arranged at the lower end of the slide part 39.
  • a spoiler 41 is arranged at the lower end of the slide member with the windows 14, 15 .
  • the spoiler 41 is directed inwardly into the discharge chamber 29 and has at its end facing away from the discharge chamber 29 end an inflow 42.
  • the inflow 42 is associated with an inflow 43, which is formed on the front edge of the table top 16.
  • the inflow profiles 42, 43 cause an acceleration of the air flow in the region of the actuation opening and thus a rapid removal of pollutants from the region of the actuation opening.
  • the side walls 11, 12 each have a guide profile 47, wherein in the Fig. 2 only the guide profile 47 of the side wall 12 can be seen.
  • Fig. 3 shows guide grooves 48, 49 in the region of the guide profile 47, in which the two parts of the sash 13 are guided displaceably.
  • a spout 44 is arranged in the area of the table top 16.
  • An outlet of the spout 44 is not shown in the figure for clarity.
  • a Z-profile 45 which is fixed in the region of the side wall 12. This Z-profile 45 is used for suspending components of the trigger 10.
  • a support structure of the table top 16 is suspended in the Z-profile 45.
  • Fig. 4 shows a plan view of the trigger 10 in a schematic representation.
  • a lamp 50 is arranged in the region of the cover 46.
  • two exhaust air ducts 35 are respectively arranged adjacent to the side walls 11, 12 and are in fluid communication with the exhaust air duct 36 and the exhaust air manifold 33, respectively.
  • the baffles 20, 21 with the side walls 11, 12 each installation channels 51, 52 form.
  • a damper 53 for a fall protection of the sash 13 is shown.
  • the damper 53 is in the illustrated embodiment, an adjustable pneumatic damper, with which a drop of the sash 13 at a Accident by hanging not shown in the figure counterweights for the sash 13 or an upsetting of the sash 13 by bursting the discs 14, 15 prevent an explosion or deflagration.
  • Fig. 5 shows a sectional view of the trigger 10 with a plan view of the table top 16.
  • a blocking element 54 is disposed in a central region between the guide plate 24 and the rear wall 30.
  • two lateral Abluftleitkanäle 31 are arranged between the guide plate 24 and the rear wall 30, which are in fluid communication with the exhaust manifold 33 and the gaps between the guide plate 24 and the baffles 20, 21 and the table top 16.
  • spoiler 59 are arranged adjacent to the side walls 11, 12 of the actuating opening.
  • the spoilers 59 are shown in cross section in the figure and extend over the height of the actuating opening.
  • Fig. 6 shows an enlarged partial view of the guide profile 47.
  • the guide profile 47 in addition to the grooves 48, 49 has a further groove 55 which is closed by a closure 56.
  • the shutter 56 is made of the same material as the guide profile 47 and formed integrally therewith. In this case, the closure 56 has a lower material thickness than the guide profile 47.
  • the closure 56 adjacent to the edges of the groove 55 predetermined breaking points 57 on. In the state shown, the groove 55 is closed, so that contamination is reliably prevented here.
  • the shutter 56 can be easily removed by pushing. The material ruptures along the predetermined breaking points 57, so that the groove 55 is then opened.
  • the guide profile 47 has an inflow profile 58 on its front side.
  • this inflow profile 58 By means of this inflow profile 58, a good inflow behavior into the actuation opening of the trigger 10 is ensured.
  • the air flow is then, as also indicated by an arrow, deflected on the guide plate 32 and directed forward.
  • the air flow in the interior of the discharge chamber 29 then sweeps along the cover 46 in the direction of the guide element 37.
  • the guide diaphragm 38 causes a direction of the suction effect from the exhaust air duct 36 just opposite to the flow.
  • the gases are then sucked through the exhaust air duct 36 and the Abluftleitkanal 35 into the exhaust manifold 33 and then transported out through the exhaust port 34 from the trigger 10. How is the Fig.
  • the flow is conducted in the interior of the discharge chamber 29 such that gas particles not passed into the exhaust duct 36 passed from the spoiler 40 back into the interior of the discharge chamber 29 and entrained again by the upward flowing gas to the guide member 37. Also, gas particles not diverted from the spoiler 40 then go down to the spoiler 41, which in turn deflects them back into the interior of the withdrawal chamber 29. Subsequent flow of air through the actuating opening leads these gas particles deflected so again upwards to the guide member 37 and the exhaust air duct 36. As is apparent from the above explanations, in the trigger 10, the formation of a flow roll in the interior of the discharge chamber 29 is just not suppressed.

Landscapes

  • Electric Suction Cleaners (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Sawing (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)

Claims (11)

  1. Hotte avec chambre de désorption qui présente des parois latérales (11, 12), un accès obturable, une sole (16) ainsi qu'une paroi supérieure (46) étant les composants avec une ouverture de ventilation ou bouche d'aération pour l'évacuation de l'air pollué de la chambre de désorption ; par ailleurs, l'ouverture de ventilation et/ou bouche d'aération ou d'extraction de la paroi supérieure (46) voisine l'ouverture d'accès au volume de travail, ladite bouche d'extraction étant munie d'un élément de guidage bidirectionnel (37), caractérisée en ce qu'elle présente l'élément de guidage bidirectionnel (37) et le déflecteur (38) en position de guidage de l'écoulement du flux d'air pollué extrait circulant le long de la paroi supérieure (46).
  2. Hotte selon la revendication 1, caractérisée en ce que la bouche d'extraction est par le fait une ouverture sous forme d'espace longiligne sur toute la largeur de l'ouverture d'accès au volume de travail.
  3. Hotte selon les revendications 1 ou 2, caractérisée en ce que l'élément de guidage bidirectionnel (37) est réalisé en forme d'entonnoir et avantageusement, le déflecteur (38) est un becquet.
  4. Hotte selon l'une des revendications précédentes, caractérisée par un répartiteur (33) pour l'extraction dans l'une des ouvertures de ventilation adaptée sur la paroi supérieure (46) qui communique, préférentiellement est reliée avec l'ouverture de ventilation en mélange des fluides et/ou de la paroi arrière (30) de la chambre d'extraction voisine et communiquant avec l'ouverture longiligne donnant elle-même sur la sole.
  5. Hotte selon l'une des revendications précédentes, caractérisée par un moyen d'extraction de l'air (24) pour la conduction du flux d'extraction avec des ouvertures d'extraction supplémentaires (27) où une plaque d'extraction (24) est préférentiellement reliée au répartiteur d'air (33) mélangeant les fluides et/ou la plaque de conduction (24) qui est à distance de la paroi arrière (30) de la chambre d'extraction formant ainsi le conduit d'extraction (31) sous-divisé notamment pour former section latérale (31).
  6. Hotte selon la revendication 5, caractérisée en ce que la plaque d'extraction (24) comprend les ouvertures d'extraction (27) sur la sole (16) ou préférentiellement les ouvertures (27) de la sole (16) sont espacées de celle-ci, la plaque de conduction (24) disposant essentiellement de décrochements arrières (25, 26) permettant de la sorte d'autres ouvertures d'extraction et/ou les autres ouvertures d'extraction (27) sont présentées en forme de U.
  7. Hotte selon l'une des revendications précédentes, caractérisée par des moyens de conduction (20, 21, 32) pour la canalisation des flux d'air dans la chambre d'extraction, où préférentiellement les moyens d'évacuation sont disposés en parties arrières (20, 21, 32), où les éléments de conduction (20, 21), notamment avec les parois latérales (11, 12) et la paroi arrière, forment des conduits d'installation (21, 52), ces derniers ayant préférentiellement une section triangulaire.
  8. Hotte selon la revendication 7, caractérisée en ce que les éléments d'écoulement (20, 21) présentent des connexions pour le raccordement de fluides (22, 23), raccordements électriques et/ou des lignes de données et/ou que les éléments de conduction (32) avec le dessus (46) et la paroi arrière (30) peuvent former le répartiteur d'extraction (33) et/ou que les éléments de conduction sont munis de becquets (40, 41) dans le volume de la chambre de travail pour le reflux de la conduction des flux d'air dans la chambre d'extraction (29) où préférentiellement le becquet (59) est disposé près de la paroi latérale (11, 12) à proximité.
  9. Hotte selon l'une des revendications précédentes, caractérisée par une face mobile frontale (13) pour l'obturation de l'ouverture de travail, où le becquet (40, 41) est fixé à la face mobile (13), cette dernière étant réalisée en deux parties et le becquet (40) étant fixé à la partie supérieure de l'élément (39) et/ou la face mobile (13) est munie d'une sécurité à blocage vertical ou, préférentiellement, cette dernière pourra être un ressort à gaz et/ou un amortisseur pneumatique (53), ce dernier pouvant être réglable.
  10. Hotte selon la revendication 9, caractérisée en ce que la sécurité à clenche de la paroi supérieure (46) et la face mobile (13) sont disposés en proximité et/ou qu'il y est disposée une rainure de guidage (47) pour la face mobile frontale (13), préférentiellement pour cette dernière il y a au moins une rainure de guidage (48, 49) et une autre rainure (55) et que cette même rainure (55) est disposée extérieurement avec une paroi mince.
  11. Hotte selon l'une des revendications précédentes, caractérisée par sa conception modulaire, préférentiellement par un châssis (11, 12) en profil de Z par accrochage intégré.
EP07105369A 2006-03-30 2007-03-30 Détente dotée d'un orifice d'échappement de l'air frontal Not-in-force EP1839766B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006015234A DE102006015234A1 (de) 2006-03-30 2006-03-30 Abzug mit vorderer Abluftöffnung

Publications (2)

Publication Number Publication Date
EP1839766A1 EP1839766A1 (fr) 2007-10-03
EP1839766B1 true EP1839766B1 (fr) 2009-08-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP07105369A Not-in-force EP1839766B1 (fr) 2006-03-30 2007-03-30 Détente dotée d'un orifice d'échappement de l'air frontal

Country Status (3)

Country Link
EP (1) EP1839766B1 (fr)
AT (1) ATE439196T1 (fr)
DE (2) DE102006015234A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007005905A1 (de) * 2007-02-01 2008-08-07 Krieger, Volker, Dr. Bypass-Absaugung für Abrauchabzüge
TWI426220B (zh) * 2011-03-22 2014-02-11 Univ Nat Taiwan Science Tech An exhaust device with a flap plate
DE102012216078A1 (de) * 2012-09-11 2014-03-13 BSH Bosch und Siemens Hausgeräte GmbH Dunstabzugsvorrichtung mit Dunstabzugshaube und Luftführungsvorrichtung
CN110548743A (zh) * 2019-08-26 2019-12-10 北京戴纳实验科技有限公司 一种弧形内腔的实验室专用通风设备
CN115338222B (zh) * 2022-06-24 2023-10-27 安徽杰克欧德实验室设备有限公司 一种废气防回流型实验室通风柜

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US2819666A (en) 1955-12-14 1958-01-14 Kirk & Blum Mfg Company Laboratory fume hood
GB1128392A (en) * 1966-04-07 1968-09-25 Turner & Brown Ltd Improvements in fume cabinets
FR2182580B1 (fr) * 1971-12-06 1974-10-11 Metayer Maurice
DE3127680C2 (de) * 1981-07-14 1985-06-05 J. Wolfferts GmbH & Co KG, 5000 Köln Selbstbelüfteter Abzug
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
US4856420A (en) * 1988-06-20 1989-08-15 Kewaunee Scientific Corporation Fume hood
DE3939063A1 (de) * 1989-11-25 1991-05-29 Wolfferts Gmbh & Co Kg J Prozessraum, insbesondere abzug fuer den laborbetrieb
HU219724B (hu) * 1998-07-28 2001-07-30 Arturo Salice S.P.A. Működtető berendezés függőleges irányban eltolható záróelemmel
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JP2003307330A (ja) * 2002-04-15 2003-10-31 Nec Tokin Corp ドラフトチャンバー装置
DE10253550A1 (de) * 2002-11-15 2004-06-03 Wesemann Gmbh & Co. Abzug mit einem Gehäuse, das einen Innenraum aufweist
DE10323675A1 (de) * 2003-05-14 2005-01-13 GfP (Gesellschaft für Produktivitätsplanung und Produktentwicklung) mbH Tischabzug für ein Labor odgl.
JP4857626B2 (ja) * 2005-07-05 2012-01-18 株式会社イトーキ 組立式ドラフトチャンバー

Also Published As

Publication number Publication date
DE502007001269D1 (de) 2009-09-24
EP1839766A1 (fr) 2007-10-03
ATE439196T1 (de) 2009-08-15
DE102006015234A1 (de) 2007-10-04

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