EP2629024B1 - Hotte avec aspiration améliorée - Google Patents

Hotte avec aspiration améliorée Download PDF

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Publication number
EP2629024B1
EP2629024B1 EP13154659.0A EP13154659A EP2629024B1 EP 2629024 B1 EP2629024 B1 EP 2629024B1 EP 13154659 A EP13154659 A EP 13154659A EP 2629024 B1 EP2629024 B1 EP 2629024B1
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EP
European Patent Office
Prior art keywords
outflow
opening
air
inflow opening
outflow device
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.)
Active
Application number
EP13154659.0A
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German (de)
English (en)
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EP2629024A2 (fr
EP2629024A3 (fr
Inventor
Frank Wesemann
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Wesemann GmbH
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Wesemann GmbH
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Publication of EP2629024A2 publication Critical patent/EP2629024A2/fr
Publication of EP2629024A3 publication Critical patent/EP2629024A3/fr
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Publication of EP2629024B1 publication Critical patent/EP2629024B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F9/00—Use of air currents for screening, e.g. air curtains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L1/00—Enclosures; Chambers
    • 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
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
    • B01L2200/08—Ergonomic or safety aspects of handling devices
    • B01L2200/082—Handling hazardous material

Definitions

  • the invention relates to a fume cupboard, in particular a laboratory fume cupboard, for sucking off gaseous media with an inflow opening for sucking in air and an actuating opening that can be closed by means of a front slide.
  • Such a fume cupboard is, for example, a laboratory fume cupboard from the DE 102 53 550 A1 known.
  • the flow behavior of such a fume cupboard is optimized for a sufficiently good extraction result or an adequate extraction performance.
  • the inflow in particular of ambient air, preferably takes place directly from the front, namely from the area surrounding the fume cupboard in the direction of the inflow opening or a front side.
  • the inflow should take place at an acute angle to the surface normal of the inflow opening plane, an actuating opening plane and / or the front side plane.
  • Such a fume cupboard can be used to work with toxic and / or hazardous substances and / or materials.
  • air, gases, vapors, dust and / or aerosols are extracted as gaseous media. For this purpose, air is sucked into the fume cupboard from an area surrounding the fume cupboard.
  • the disadvantage here is that an inflow into the vent that is optimized for sufficient suction power can be influenced by surrounding currents. There is therefore the risk that, due to unfavorable framework conditions, the room air flows surrounding the fume cupboard and / or supply air flows have a negative impact on the optimized one Affect flow behavior. For example, currents running from above and / or below and essentially in the plane of the front side can have a negative effect on the inflow for the fume cupboard, as can currents flowing around from side walls into the area of the front side.
  • the disruptive room air and / or supply air flows can arise due to the type of introduction into the surrounding area for the vent, in particular the direction and / or speed of flow.
  • US 4467782 is the closest prior art and discloses a fume cupboard for sucking off gaseous media with an inflow opening for sucking in air and with at least one outflow device for creating an air barrier.
  • the advantage here is that the negative impairments due to disruptive room air and / or supply air flows can be reduced by means of the outflow device.
  • the outflow device preferably provides an air barrier comprising at least one air curtain.
  • otherwise disruptive room air and / or supply air flows can be deflected in the direction of the surrounding space and guided away from the vent, in particular the inflow opening.
  • the air required for the function of the vent is thus largely unaffected by disruptive flows from the front, in particular at an acute angle to the surface normal of the inflow opening plane, an actuating opening plane and / or the front side plane, can be supplied from the surrounding area in the direction of the inflow opening.
  • the conditions for the air flowing into the fume cupboard are better, in particular at least largely independent of the Deduction of surrounding flow conditions, definable and / or controllable. A sufficiently good deduction result or a sufficient deduction can thus be guaranteed.
  • the air barrier extends in a plane transversely, in particular at right angles, to a plane of the inflow opening, an actuating opening, a front side and / or a side wall.
  • the air barrier acts as a kind of obstacle on flows that run essentially parallel to the plane of the inflow opening, actuating opening and / or front side.
  • the disruptive flow is deflected in the direction of the flow of the air barrier and thus guided away from the inflow opening, actuating opening and / or front side.
  • the inflow opening and / or the actuating opening is preferably at least partially surrounded by the outflow device.
  • the inflow opening and / or the actuating opening is completely surrounded by at least one outflow device. In this way, the inflow of air into the fume cupboard is particularly well prevented from being influenced by disruptive currents.
  • the outflow device can have one or more outflow elements.
  • the outflow element is preferably designed as a nozzle bar and / or a nozzle.
  • the outflow device can be designed as a separate component, in particular for retrofitting fume cupboards. Alternatively, the outflow device can be at least partially integrated into the fume cupboard.
  • the outflow element is disk-like, preferably with a circular and / or oval shape in cross section that is like a segment of a circle.
  • the outflow device has at least one outflow opening for the outflow of air and creation of the air barrier.
  • the outflow opening can be made in a front side and / or a side wall of the fume cupboard.
  • the outflow opening is designed as a nozzle.
  • the outflow opening is preferably designed to generate an air flow directed away from the inflow opening, an actuating opening, a front side and / or a side wall into a surrounding space for the formation of the air barrier.
  • the outflow device can have several outflow openings, in particular arranged next to one another and / or one above the other. The outflow openings can be positioned on a line with one another.
  • an opening angle for the outflowing air flow and / or the air barrier in the range from 0 ° to 180 °, in particular from 30 ° to 150 °, particularly preferably from 60 ° to 120 °, can be realized.
  • This is a triangular in cross section and / or Cone-like air barrier can be implemented, which further improves the shielding effect on disruptive flows.
  • the opening angle is preferably arranged symmetrically to a surface normal, in particular a front side, a side wall or an outflow device surface.
  • the outflow device surface can be designed as a semicircular and / or quarter-circular circumferential surface.
  • the outflowing air flow is preferably directed radially away from the outflow device surface.
  • the outflow device is arranged above, below and / or to the side of the inflow opening.
  • the air barrier in particular the outflow device, preferably extends over at least the entire width and / or at least the entire height of the inflow opening and / or an actuating opening. This improves the shielding against disruptive currents even further.
  • the actuating opening is preferably designed as an access opening, in particular for an operator, to reach a fume cupboard.
  • the actuation opening can be designed to be closable, in particular by means of a closure element, preferably a sash and / or sliding elements.
  • an inflow opening remains open when the actuating opening is closed.
  • the inflow opening can be arranged below the actuation opening closed by means of the closure element and directly above an edge of a work surface of the extraction chamber.
  • the inflow opening is preferably designed as an actuating opening, in particular at least partially closable.
  • At least one outflow device in particular with two or three outflow elements, is arranged in an area above an upper edge of the inflow opening and below an upper edge of the fume cupboard.
  • the outflow device can be arranged in the area of a first side wall and / or a second side wall.
  • the outflow device is arranged in the area of an edge and / or a transition from a side wall to a front side.
  • the outflow device is only provided in the area of the outer free-standing side walls.
  • the outer ones are free standing side walls assigned to the two triggers, which are each at one end of a row of triggers.
  • the outflow device preferably extends from an area between a standing surface and a lower edge of the inflow opening to an area between an upper edge of the inflow opening and an upper edge of the vent.
  • a ventilation device in particular a fan, is provided for sucking in and / or accelerating air, in particular room air and / or supply air from a supply air device, for supplying the outflow device with air.
  • the ventilation device can be designed as a separate component, in particular for retrofitting a fume cupboard, or as an integral part of the fume cupboard.
  • the air flow and / or the air barrier can preferably be blown out by means of the ventilation device at an exit speed in a range from 0.1 m / s to 1.5 m / s.
  • the exit velocity above the inflow opening is preferably in a range from 0.2 m / s to 1.0 m / s.
  • the exit speed can be in a range from 0.15 m / s to 0.5 m / s. Due to these exit speeds, on the one hand, an adequate shielding effect can be achieved, and on the other hand, the area surrounding the fume cupboard is not unnecessarily stirred up. In particular, a work situation that is sufficiently pleasant for an operator can be ensured.
  • a heating device is provided for heating the air provided for the outflow device.
  • the air can be heated to ambient temperature.
  • the heating device is preferably integrated into the outflow device and / or arranged between the ventilation device and the outflow device.
  • a controller for controlling the outflow device, the ventilation device and / or the heating device is provided.
  • the control preferably takes place as a function of an adjustable degree of opening of the inflow opening.
  • the inflow opening is designed as an at least partially closable actuating opening. As a result, the degree of opening of the inflow opening can be changed. Depending on how far the inflow opening or the actuating opening is closed and / or opened, the outflow speed, the outflow flow rate and / or the heating temperature can be changed.
  • Particularly advantageous is a method for sucking off gaseous media with a fume cupboard, in particular a laboratory fume cupboard, in which air is sucked in through an inflow opening, an air barrier extending into an ambient space being generated by means of at least one outflow device.
  • the air barrier is preferably aligned in a plane transverse, in particular at right angles, to a plane of the inflow opening, an actuating opening, a front side and / or a side wall.
  • the air barrier and / or the air flow of the air barrier is directed away from the plane of the inflow opening, actuating opening, front side and / or side wall.
  • the inflow opening and / or the actuating opening is preferably at least partially surrounded by the outflow device, as a result of which the barrier effect is further improved.
  • an exit speed of the air barrier from the outflow device and / or a flow rate of the air through the outflow device, in particular as a function of an adjustable degree of opening of the inflow opening, is controlled by means of a controller.
  • the outflow device is thus operated as required.
  • Fig. 1 shows a perspective side view of a first trigger 10 according to the invention.
  • the trigger 10 has a front side 11 and two side walls 12, 13 facing away from one another.
  • the front side 11 is assigned a closable actuating opening 14.
  • the actuating opening 14 can be closed by means of a vertically displaceable front sash 15 and horizontally displaceable sliding elements 16 integrated therein.
  • a trigger chamber 17 in the interior of the trigger 10 is accessible to an operator by means of the actuating opening 14.
  • At least one inflow opening 18 is provided, which enables air to be drawn in from an ambient space that surrounds the vent 10.
  • the size of the inflow opening 18 can be adjusted as a function of the position of the sash 15 and / or the sliding elements 16.
  • the sash 15 is in its closed position while the sliding elements 16 leave a region of the actuating opening 14 free. As a result, the inflow opening 18 is enlarged accordingly.
  • the vent 10 has an outflow device 19.
  • the outflow device 19 has outflow elements 20, 21, 22, 23, 24.
  • the outflow elements 20, 21, 22 are arranged above the actuation opening 14 and each extend over the entire width of the actuation opening 14 or the trigger 10.
  • the outflow elements 23, 24 are each arranged laterally next to the actuation opening 14 and extend over approximately the entire width Height of the trigger 10.
  • the outflow elements 20, 21, 22, 23, 24 are designed as nozzle strips.
  • the outflow device 19 or the outflow elements 20, 21, 22, 23, 24 have several outflow openings, not shown here.
  • the outflow openings are arranged in the longitudinal direction of the outflow elements 20, 21, 22, 23, 24.
  • An air flow emerges from the outflow device 19 or the outflow openings, as is indicated schematically by arrows 25.
  • arrows 25 For a better overview, not all arrows 25 are provided with a reference number.
  • an air flow or an air barrier is generated by means of the outflow device 19, which is directed away from the front side 11, the actuating opening 14 and the inflow opening 18 and into the surrounding space.
  • the actuation opening 14 and the inflow opening 18 are partially surrounded by the outflow device 19, namely above and to the side of the actuation opening 14 and the inflow opening 18.
  • FIG. 13 is a section from the perspective side view of the first trigger 10 according to the invention according to FIG Fig. 1 refer to.
  • the section shown here shows part of the outflow elements 20, 24.
  • the outflow element 20 has outflow openings 26 which, in the exemplary embodiment shown here, are arranged horizontally or horizontally next to one another.
  • the outflow element 24 has outflow openings 27 which, in the exemplary embodiment shown here, are arranged vertically or vertically one above the other. For a better overview, not all outflow openings 26, 27 are provided with a reference number.
  • the air flow flowing out of the outflow openings 26, 27, indicated schematically by the arrows 25, is directed away from the front side 11 or the plane of the front side 11 in this example.
  • the air flow is blown out of the outflow device 19 or the outflow openings 26, 27 at an opening angle in the range from 60 ° to 120 °.
  • the opening angle is symmetrical to a surface normal to the front side 11.
  • the outflow elements 20, 21, 22, 23, 24 each generate an air curtain as part of the entire air barrier.
  • the actuation opening 14 and / or the inflow opening 18 are partially surrounded by the air barrier or the air curtains.
  • the exit speed of the air flow from the outflow openings 26 of the outflow elements 20, 21, 22 in the exemplary embodiment shown here is in the range from 0.2 m / s to 1.0 m / s.
  • the exit speed of the air flow is in the range from 0.15 m / s to 0.5 m / s.
  • Fig. 3 shows a perspective side view of a second trigger 28 according to the invention.
  • the second trigger 28 has a largely to the trigger 10 according to FIG Fig. 1 and Fig. 2 same structure.
  • the same elements as before have the same reference symbols. In this respect, reference is also made to the preceding description.
  • the trigger 28 shown here has an outflow device 29 in which outflow elements 30, 31 are provided instead of outflow elements 23, 24.
  • the outflow elements 30, 31 are also arranged laterally next to the actuation opening 14 and the inflow opening 18 and extend over the entire height of the trigger 28.
  • the air flow emerging from the outflow elements 30, 31 schematically according to the arrows 25 is aligned transversely to the plane of the side wall 12 and 13, respectively.
  • FIG. 13 is a section from the perspective side view of the second trigger 28 according to the invention according to FIG Fig. 3 .
  • the section shows part of the outflow elements 20, 30.
  • the outflow element 20 has outflow openings 26 which, in the exemplary embodiment shown here, are arranged horizontally or horizontally next to one another.
  • the outflow element 30 has outflow openings 32 which, in the exemplary embodiment shown here, are arranged vertically or vertically above one another. For a better overview, not all outflow openings 26, 32 are provided with a reference number.
  • the air flow out of the outflow openings 26, indicated schematically by means of the arrows 25, is directed away from the front side 11 in this example.
  • the outflow elements 20, 21, 22 an air barrier results, the components of which, in the embodiment shown here, extend from the outflow elements 20, 21, 22 transversely to the front side 11 and away from the front side 11.
  • the outflow openings 32 of the outflow elements 30, 31 cause an air barrier which, although it also extends away from the front side 11, is arranged essentially in a plane parallel to the front side 11.
  • the outflow elements 20, 21, 22, 30, 31 each generate an air curtain as a component of the entire air barrier.
  • the air flow is blown out of the outflow elements 20, 21, 22, 30, 31 or the outflow openings 26, 32 at an opening angle in the range from 60 ° to 120 °.
  • the opening angle for the outflow openings 26 is symmetrical to the surface normal of the front side 11 and for the outflow openings 32 is symmetrical to the surface normal of the side wall 12 or 13.
  • Fig. 5 shows a perspective side view of a further trigger 32 according to the invention.
  • the further trigger 32 has one largely to the triggers 10, 28 according to FIG FIGS. 1 to 4 same structure.
  • the same elements as before have the same reference symbols. In this respect, reference is also made to the preceding description.
  • the trigger 32 shown here has an outflow device 33 in which outflow elements 34, 35, 36 are provided instead of the outflow elements 20, 21, 22, 23, 24 or 30, 31.
  • the outflow elements 34, 35, 36 are assigned to an upper end of the front side 11.
  • the outflow element 34 is central to the longitudinal axis of the front side 11 positioned and formed in the embodiment shown here as a semicircular disk.
  • the semicircular disk is arranged at right angles to the plane of the front side 11 and in the direction of the surrounding space, the plane of the outflow element 34 extending horizontally and at right angles to the front side 11.
  • the diameter of the discharge element 34 is significantly smaller than the width of the flue 32. In this embodiment, the diameter is about 1/5 of the width of the flue 32.
  • the air flow emerging from the discharge element 34 is of the semicircular shape Peripheral surface directed away.
  • the outflow elements 35, 36 are arranged adjacent to the side walls 12 and 13 at the upper end of the front side 11.
  • the outflow elements 35, 36 are designed as quarter-circle disks.
  • the quarter-circular disks are arranged at right angles to the plane of the front side 11 and in the direction of the surrounding space, the plane of the outflow elements 35, 36 extending perpendicularly and at right angles to the front side 11.
  • the quarter-circular circumferential surfaces of the outflow elements 35, 36 face away from an upper edge of the trigger 32.
  • the radius of the quarter-circular outflow elements 35, 36 in the embodiment shown here corresponds to the radius of the semicircular outflow element 34.As indicated schematically by the arrows 25, the air flow emerging from the outflow elements 35, 36 is directed away from the quarter-circular peripheral surfaces.
  • FIG. 12 is a section from the perspective side view of the further trigger 32 according to the invention according to FIG Fig. 5 refer to.
  • the section shows the outflow elements 34, 35.
  • the outflow element 34 has outflow openings 37 which, in the exemplary embodiment shown here, are arranged on a circumferential surface 38 of the outflow element 34 which is semicircular in cross section.
  • the outflow element 35 has outflow openings 39 which, in the exemplary embodiment shown here, are arranged on a circumferential surface 40 with a quarter circle in cross section. For a better overview, not all outflow openings 37, 39 are provided with a reference number.
  • the air flow indicated schematically by the arrows 25 from the outflow openings 37, 39 is directed away from the circumferential surface 38, 40 in this example.
  • an air barrier results which, in the exemplary embodiment shown here, extends from the circumferential surface 38 transversely to the front side 11 and away from the front side 11. This results in an essentially horizontal alignment of the air barrier.
  • the outflow openings 39 and the outflow elements 35, 36 cause an air barrier which also extends transversely to the front side and away from the front side 11, but has a substantially vertical orientation.
  • the outflow elements 34, 35, 36 each generate an air curtain as a component of the entire air barrier.
  • the air flow is at an opening angle in the range of 60 ° to 120 ° from the outflow elements 34, 35, 36 or the outflow openings 37, 39 blown out.
  • the opening angle is symmetrical to the surface normal of the circumferential surface 38 or 40.
  • the invention is based on the Figs. 1 to 6 explained in more detail:
  • the vents 10, 28, 32 are optimized with regard to a predetermined flow in order to achieve a sufficiently good suction result.
  • the inflow in particular of ambient air, preferably takes place directly from the front, namely from the ambient space in the direction of the front side 11 or the inflow opening 18.
  • the outflow devices 19, 29, 33 provide an air barrier made of air curtains which at least partially surround the inflow opening 18 or the actuating opening 14 and move away from the trigger 10, 28, 32 or the front 11 and / or the side walls 12, 13 extend in the direction of the surrounding area.
  • otherwise disruptive flows are deflected in the direction of the surrounding space and guided away from the vent 10, 28, 32, in particular the inflow opening 18.
  • the air required for the operation of the vent 10, 28, 32 is thus largely unaffected by disruptive currents and can be supplied from the front from the surrounding space in the direction of the inflow opening 18.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Clinical Laboratory Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Flow Control Members (AREA)
  • Ventilation (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Claims (14)

  1. Hotte, en particulier une hotte de laboratoire, pour l'extraction de milieux gazeux avec une ouverture d'entrée (18) pour l'aspiration d'air et une ouverture d'actionnement (14) pouvant être fermée au moyen d'une coulisse avant (15), au moins un dispositif de sortie (19, 29, 33) étant prévu pour générer une barrière à l'air s'étendant dans un espace ambiant, la barrière à l'air étant orientée dans la direction de l'espace ambient et s'éloignant de l'ouverture d'entrée (18) pour dévier les flux d'air ambiant et / ou de soufflage perturbateurs.
  2. Hotte selon la revendication 1, caractérisée en ce que la barrière à l'air s'étend dans un plan transversal, notamment à angle droit, à un plan de l'ouverture d'entrée (18), d'une ouverture d'actionnement (14), d'un côté avant (11) et/ou d'une paroi latérale (12, 13), de préférence l'ouverture d'entrée (18) et / ou l'ouverture d'actionnement (14) est au moins partiellement entourée par le dispositif de sortie (19, 29, 33).
  3. Hotte selon la revendication 1 ou 2, caractérisée en ce que le dispositif de sortie (19, 29, 33) présente au moins une ouverture de sortie (26, 27, 37, 39) pour générer barrière à l'air, de préférence l'ouverture de sortie (26, 27, 37, 38) est conçue pour générer un flux d'air dirigé loin de l'ouverture d'entrée (18), d'une ouverture d'actionnement (14), d'un côté avant (11) et / ou d'une paroi latérale (12, 13) dans un espace ambiant pour la formation de la barrière à l'air, et / ou le dispositif de sortie (19, 29, 33) présente plusieurs ouvertures de sortie (26, 27, 37, 38), notamment disposées en ligne les unes à côté des autres.
  4. Hotte selon l'une des revendications précédentes, caractérisée en ce qu'au moyen du dispositif de sortie (19, 29, 33) et/ ou du dispositif de sortie (26, 27, 37, 38), il est possible de réaliser un angle d'ouverture pour le flux d'air sortant et/ ou la barrière à l'air dans la plage de 0° à 180°, en particulier de 30° à 150°, en particulier de préférence de 60° à 120°, de préférence l'angle d'ouverture est disposé symétriquement par rapport à une normale de surface, en particulier un côté avant (11), une paroi latérale (12, 13) ou une surface de dispositif de sortie (38, 40).
  5. Hotte selon l'une des revendications précédentes, caractérisée en ce que le dispositif de sortie (19, 29, 33) est disposé au-dessus, en dessous et / ou latéralement à côté de l'ouverture d'entrée (18), de préférence la barrière à l'air, en particulier le dispositif de sortie (19, 29, 33), s'étend sur au moins toute la largeur et / ou au moins toute la hauteur de l'ouverture d'entrée (18) et / ou d'une ouverture d'actionnement (14).
  6. Hotte selon l'une des revendications précédentes, caractérisée en ce qu'au moins un dispositif de sortie (19, 29, 33), en particulier avec deux ou trois éléments de sortie (20, 21, 22), est disposé au niveau d'une zone au-dessus d'un bord supérieur de l'ouverture d'entrée (18) et en dessous d'un bord supérieur de la hotte (10, 28, 32).
  7. Hotte selon l'une des revendications précédentes, caractérisée en ce que le dispositif de sortie (19, 29, 33) est disposé au niveau d'une première paroi latérale (12) et / ou d'une deuxième paroi latérale (13), de préférence le dispositif de sortie (19, 29, 33) s'étend d'une zone entre une surface droite et un bord inférieur de l'ouverture d'entrée (18) à une zone entre un bord supérieur de l'ouverture d'entrée (18) et un bord supérieur de la hotte (10, 28, 32).
  8. Hotte selon l'une des revendications précédentes, caractérisée en ce qu'un dispositif de ventilation, en particulier un ventilateur, est prévu pour aspirer et/ou accélérer de l'air, en particulier de l'air ambiant et/ou de l'air d'alimentation provenant d'un dispositif d'alimentation en air, pour fournir de l'air au dispositif de sortie (19, 29, 33).
  9. Hotte selon la revendication 8, caractérisée en ce qu'au moyen du dispositif de ventilation, le flux d'air et / ou la barrière à l'air peuvent être soufflés avec une vitesse de sortie dans une plage de 0,1 m / s à 1,5 m / s, de préférence la vitesse de sortie est supérieure à l'ouverture d'entrée (18) dans une plage de 0,2 m / s à 1,0 m / s, en particulier la vitesse de sortie se trouve latéralement à côté de l'ouverture d'entrée (18) dans une plage de 0,15 m / s à 0,5 m / s.
  10. Hotte selon l'une des revendications précédentes, caractérisée en ce qu'un dispositif de chauffage est prévu pour chauffer l'air prévu pour le dispositif de sortie (19, 29, 33), de préférence le dispositif de chauffage est intégré dans le dispositif de sortie (19, 29, 33) et / ou arrangé entre le dispositif de ventilation et le dispositif de sortie (19, 29, 33).
  11. Hotte selon l'une des revendications précédentes, caractérisée en ce qu'un dispositif de commande est prévu pour commander le dispositif de sortie (19, 29, 33), le dispositif de ventilation et / ou le dispositif de chauffage, notamment en fonction d'un degré d'ouverture réglable de l'ouverture d'entrée (18).
  12. Procédé d'extraction de milieux gazeux avec une hotte (10, 28, 32), en particulier une hotte de laboratoire, avec une ouverture d'actionnement (14) pouvant être fermée au moyen d'une coulisse avant (15), dans lequel de l'air est aspiré à travers une ouverture d'entrée (18), dans lequel au moyen d'au moins un dispositif de sortie (19, 29 33) est générée une barrière à l'air s'étendant dans un espace ambiant, la barrière à l'air étant orientée dans la direction de l'espace ambient et s'éloignant de l'ouverture d'entrée (18) pour dévier les flux d'air ambiant et / ou de soufflage perturbateurs.
  13. Procédé selon la revendication 12, caractérisé en ce que la barrière à l'air est orientée dans un plan transversal, notamment à angle droit, à un plan de l'ouverture d'entrée (18), d'une ouverture d'actionnement (14), d'un côté avant (11) et / ou d'une paroi latérale (12, 13), de préférence l'ouverture d'entrée (18) et / ou l'ouverture d'actionnement (14) est au moins partiellement entourée par le dispositif de sortie (19, 29, 33).
  14. Procédé selon la revendication 13, caractérisé en ce qu'une vitesse de sortie de la barrière à l'air depuis le dispositif de sortie (19, 29, 33) et / ou un débit d'air à travers le dispositif de sortie (19, 29, 33), en fonction notamment d'un degré réglable d'ouverture de l'ouverture d'entrée (18), est commandée par un dispositif de commande.
EP13154659.0A 2012-02-15 2013-02-08 Hotte avec aspiration améliorée Active EP2629024B1 (fr)

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DE102012002804A DE102012002804A1 (de) 2012-02-15 2012-02-15 Abzug mit verbesserter Einsaugung

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Publication number Priority date Publication date Assignee Title
DE102020129412A1 (de) * 2020-11-09 2022-05-12 Lab-Concept GmbH Abzugsvorrichtung mit Volumenstromregelung
CN113751452B (zh) * 2021-08-20 2023-04-07 哈工大泰州创新科技研究院有限公司 一种实验室通风柜

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Publication number Priority date Publication date Assignee Title
DE3127680C2 (de) * 1981-07-14 1985-06-05 J. Wolfferts GmbH & Co KG, 5000 Köln Selbstbelüfteter Abzug
US4467782A (en) * 1981-08-19 1984-08-28 Russell Robert E Ventilating system for use with devices which produce airborne impurities
US6450879B1 (en) * 2001-10-29 2002-09-17 Yeong-Nian Suen Air curtain generator
DE10253550A1 (de) 2002-11-15 2004-06-03 Wesemann Gmbh & Co. Abzug mit einem Gehäuse, das einen Innenraum aufweist
JP2009139067A (ja) * 2007-12-10 2009-06-25 Toto Ltd 排気装置
DE102008014283B4 (de) * 2008-03-06 2021-06-10 Blanco Professional Gmbh + Co Kg Wrasenabzugsvorrichtung und eine solche umfassende Aufnahmevorrichtung für mindestens eine Speisenzubereitungseinheit

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EP2629024A3 (fr) 2017-01-11
DE102012002804A1 (de) 2013-08-22

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