EP3562600B1 - Sorbonne de laboratoire à jets de paroi et/ou de fond - Google Patents

Sorbonne de laboratoire à jets de paroi et/ou de fond Download PDF

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Publication number
EP3562600B1
EP3562600B1 EP17823174.2A EP17823174A EP3562600B1 EP 3562600 B1 EP3562600 B1 EP 3562600B1 EP 17823174 A EP17823174 A EP 17823174A EP 3562600 B1 EP3562600 B1 EP 3562600B1
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EP
European Patent Office
Prior art keywords
fume hood
jets
working space
openings
jet
Prior art date
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EP17823174.2A
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German (de)
English (en)
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EP3562600B8 (fr
EP3562600A1 (fr
Inventor
Jürgen Liebsch
Christian Oliver Paschereit
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 Se & Co Kg
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Waldner Laboreinrichtungen GmbH and Co KG
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Publication of EP3562600B1 publication Critical patent/EP3562600B1/fr
Publication of EP3562600B8 publication Critical patent/EP3562600B8/fr
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    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/16—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by purification, e.g. by filtering; by sterilisation; by ozonisation
    • F24F3/163—Clean air work stations, i.e. selected areas within a space which filtered air is passed
    • 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 present invention relates to a laboratory hood, in particular to a flow-optimized and energy-efficient laboratory hood.
  • the effect of the compressed air jets in the area of the side walls and the floor of the work area is diverse. They not only prevent flow separation of the incoming room air at the downstream end of the hollow profiles, but also reduce any wall friction effects, so that there can be significantly less turbulence and thus backflow areas in these areas.
  • the room air entering the work space glides, so to speak, on a dynamic, rearward-moving air cushion along the walls and the worktop into the rear area of the work space, where it is extracted.
  • this has a positive effect on the overall energy balance of the fume hood, since the air velocity in the other areas of the interior of the fume hood can be reduced without adversely affecting the retention capacity.
  • the document DE 101 46 000 A1 discloses a trigger according to the preamble of claim 1 or claim 2.
  • the inventors of the present invention were able to observe for the first time in fume cupboards equipped with conventional support jet technology that, contrary to previous investigations with fog, in which no significant flow separation of the wall jets could be detected, when investigating the flow field of the wall jets using PIV measurements ("Particle Image Velocimetry" measurements) a flow separation already occurs a relatively short distance behind the level of the sash and consequently dangerous backflow areas can develop on the side walls.
  • the main goal pursued with the present invention is therefore primarily to further improve the escape security of a fume hood equipped with support jet technology and at the same time to further reduce its energy consumption.
  • the invention provides, according to claim 1, a fume cupboard for a laboratory space which has a housing in which there is a work space which is delimited at the front by a sash, at the bottom by a base plate and at the sides by a side wall.
  • the fume hood further comprises a first hollow profile arranged on a front end face of each side wall, each first hollow profile having a first pressure chamber which is fluidly connected to a plurality of first openings from which air jets in the form of wall jets consisting of compressed air along the respective side wall in the workspace can be issued.
  • the fume hood contains that the size of the first openings and the air pressure prevailing in the first pressure chamber when the fume hood is used as intended are selected such that the first pressure chamber can be fluidly connected to a compressed air system installed in the building without the wall jets separating from the flow of the side wall in an area from a front of the working space to at least 25% of the depth of the working space.
  • the fume hood is characterized in that at least one of the first openings is formed by a nozzle geometry thereof in such a way that the compressed air jet leaving the first opening is discharged into the working space as a periodically oscillating wall jet.
  • the invention provides a fume hood for a laboratory space that is a Has a housing in which there is a working space, the front of a sash, the bottom of a base plate and each side of a side wall is limited.
  • the fume hood also includes a second hollow profile arranged on a front end face of the base plate, the second hollow profile having a second pressure chamber which is fluidly connected to a plurality of second openings, from which air jets in the form of ground jets consisting of compressed air flow along the base plate into the Workspace can be issued.
  • the fume hood contains that the size of the second openings and the air pressure prevailing in the second pressure chamber when the fume hood is used as intended are selected such that the second pressure chamber can be fluidly connected to a compressed air system installed in the building without the ground jets separating from the flow of the floor panel in an area from a front of the workspace to at least 25% of the depth of the workspace.
  • the fume hood is characterized in that at least one of the second openings is formed by a nozzle geometry thereof in such a way that the compressed air jet leaving the second opening is discharged into the working space as a periodically oscillating ground jet.
  • the trigger has both a first hollow profile and a second hollow profile.
  • the flue does not experience flow separation of the wall jets from the sidewall or the bottom jets from the floorplate in a region from the front of the workspace to at least 75% of the depth of the workspace.
  • a first and/or a second pressure transducer is/are provided, which is/are fluidly connected to the first and/or the second pressure chamber.
  • the first and/or the second pressure sensor comprises a first and/or a second pressure sensor line, which are/is arranged in such a way that an end of the first and/or the second pressure sensor line on the pressure chamber side is flush with an inner surface of the first and / or the second pressure chamber ends.
  • a control device which sets the pressure in the first and/or the second pressure chamber in a range from 50 Pa to 500 Pa, preferably in a range from 150 Pa to 200 Pa, when the trigger is used as intended.
  • the control device is preferably electrically connected to the first and/or the second pressure sensor.
  • control device is a pressure reducer or a mass flow controller which is arranged upstream of the first and/or the second pressure chamber.
  • the pressure reducer or the mass flow controller is arranged inside the housing.
  • a cross-sectional area, viewed perpendicularly to the flow direction, of at least one of the first and/or the second openings, preferably all the first and/or second openings, is preferably in a range from 1 mm 2 to 4 mm 2 .
  • a cross-sectional area, seen perpendicular to the direction of flow, of at least one of the first and/or the second openings, preferably all of the first and/or second openings, is in a range from 1.8 mm 2 to 3 mm 2 .
  • An advantageous embodiment of the fume hood is when all the first and/or second openings are formed by a nozzle geometry of the same such that the compressed air jets leaving the first and/or the second openings are periodically oscillating wall jets (100) and/or periodically oscillating ground jets (200) are output into the workspace. It is also advantageous if the periodicity is in a range from 1 Hz to 100 kHz, preferably 200 Hz to 300 Hz.
  • the periodic oscillation of the wall jet and/or the ground jet is achieved by merely non-movable
  • Components of the first and / or the second hollow profile which are preferably formed in one piece, produced.
  • the periodic oscillation of the wall jet and/or the ground jet is generated by self-excitation.
  • At least one first and/or one second fluidic oscillator which comprises/comprises the first and/or second opening, preferably a plurality of first and/or second fluidic oscillators are provided, each of which comprise a first and/or a second opening and which/which/which generate the periodic oscillation of the wall jet(s) and/or the periodic oscillation of the ground jet(s).
  • first and/or second openings have a circular, round, oval, rectangular or polygonal shape.
  • An advantageous embodiment of the invention relates to a trigger, which is characterized in that at least a first and/or a second opening is fluidly connected to the first and/or the second pressure chamber via a first and/or a second elongate channel, and that the first and/or the second channel has a length L which is at least 3 times, preferably 4 times to 11 times the hydraulic diameter of a cross-sectional area, viewed perpendicularly to the direction of flow, of the associated opening.
  • the fume hood 1 shown in perspective corresponds approximately to the fume hood that has been sold by the applicant almost worldwide since about 2002 under the name Secuflow® . Thanks to the support jet technology described above, this laboratory fume cupboard requires an exhaust air volume flow of only 270 m 3 /(h ⁇ lfm). This deduction (Designation: Secuflow® TA-1500) served as a reference for the measurements carried out within the scope of the present invention, which are described further below.
  • the trigger according to the invention corresponds to that in 1 illustrated fume cupboard 1.
  • the fume cupboard according to the invention differs from the conventional Secuflow ® fume cupboard, in particular with regard to the nozzle geometry of the hollow profiles 10, 20 and the way in which the compressed air jets 100, 200 emitted from the hollow profiles 10, 20 are generated.
  • the fume hood 1 shown has a fume hood interior which is preferably delimited at the rear by a baffle 40, at the sides by two side walls 36, at the bottom by a base plate 34 or worktop, at the front by a lockable sash 30 and at the top preferably by a ceiling panel 48.
  • the sash 30 is preferably designed in several parts in such a way that several vertically displaceable window elements extend telescopically one behind the other in the same direction when the sash 30 is opened and closed.
  • the window element arranged furthest down when the sash 30 is in the closed position preferably has an aerodynamically optimized airfoil profile 32 ( 2 ) on.
  • the sash 30 preferably has horizontally displaceable window elements, which allow the laboratory personnel access to the interior of the fume hood even when the sash 30 is in the closed position.
  • the sash 30 can also be designed as a two-part sliding window, the two parts of which can be moved in opposite directions in the vertical direction.
  • the counter-rotating parts are coupled via cables or belts and pulleys with weights that balance the mass of the sash.
  • a duct 63 which leads to an exhaust air collection duct 50 on the top of the fume hood 1.
  • the exhaust air collecting duct 50 is connected to an exhaust air device installed in the building.
  • a piece of furniture 38 is arranged below the worktop 34 of the fume cupboard interior, which serves as storage space for various laboratory utensils. This In the sense of the terminology used here, furniture is to be understood as part of the housing 60 of the laboratory hood 100 .
  • Hollow profiles 10 are provided on the front end faces of the side walls 36 of the fume hood 1, which are conventionally also referred to as side posts.
  • a hollow profile 20 is also provided on the front face of the base plate 34 .
  • the airfoil-shaped inflow side 10a of the hollow profile 10 or the side post profile 10 ( 4 ) preferably formed aerodynamically optimized.
  • the same preferably also applies to the hollow profile 20 on the front face of the base plate 34.
  • the wing-like profile geometry enables a low-turbulence, in the best case even a turbulence-free, inflow of room air into the interior of the hood when the sash 30 is partially or fully open.
  • so-called support jets ie compressed air jets 100, 200 consisting of compressed air
  • These compressed air jets are conventionally provided by a fan 70 ( 3 ) generated.
  • the hollow sections 10, 20 are preferably located in front of the level of the foremost sash element.
  • the compressed air jets 100, 200 therefore preferably only reach the interior of the fume hood when the sash 30 is partially or fully open.
  • the laboratory hood 1 shown is to be seen purely as an example, because the invention can be applied to different types of laboratory hoods, for example bench hoods, low-room bench hoods, deep hoods, walk-in hoods or even mobile laboratory hoods.
  • These fume cupboards also meet the European series of standards DIN EN 14175 valid on the filing date of the present patent application.
  • the fume cupboards can also meet other standards, for example ASHRAE 110/1995, which is valid for the USA.
  • FIG. 2 shows in a highly simplified manner the course of the flow of the compressed air jets 100, 200 emerging from the hollow sections 10, 20 within the interior of the fume hood and the exhaust air in the duct 63 between the baffle wall 40 and the rear wall 62 to the exhaust air collection duct 50.
  • the view in 2 corresponds to a cross-sectional view taken along the line AA in 1 .
  • the baffle 40 is preferably spaced from the worktop 34 on the bottom side and preferably from the rear wall 62 of the housing, as a result of which the exhaust air duct 63 is formed.
  • the baffle 40 preferably has a plurality of elongated openings 42 ( 1 ) through which the exhaust air or the toxic air in the fume cupboard flows through and can enter the duct 63.
  • Further openings 47 are preferably provided on the ceiling 48 in the interior of the fume hood, through which, in particular, light gases and vapors can be guided to the exhaust air collecting duct 50 .
  • the baffle 40 may also preferably be spaced from the side walls 36 of the trigger housing 60. A gap formed in this way can also be used to introduce exhaust air through it into the exhaust air duct 63 .
  • a plurality of tripod holders 44 are preferably provided on the baffle wall 40, in which rods can be detachably clamped, which serve as holders for test setups in the interior of the fume hood.
  • the compressed air or support jets 100, 200 generated by a arranged below the base plate 34 and preferably within the housing 60 fan 70.
  • the fan 70 used in the measurements carried out as part of the invention was a single inlet centrifugal fan from ebm Papst with the designation G1G097-AA05-01.
  • the compressed air generated by the fan 70 is first fed into the hollow profile 20 arranged in the area of the front face of the base plate 34 .
  • the fan compressed air is preferably fed into the hollow profile 20 at a point which is approximately in the middle of the longitudinal extent of the hollow profile 20 extending in the width direction of the hood. In this way it is achieved that the pressure drop in the hollow profile 20 is approximately symmetrical relative to this point.
  • the applicant's conventional Secuflow ® laboratory fume hood due to the positive effect of the support jets 100, 200, was able to achieve the minimum exhaust air volume flow required to maintain the standardized escape safety , ie that minimum volumetric flow which still meets the legal requirements for the escape safety of the deduction and which the exhaust air system installed in the building and connected to the exhaust air collecting duct 50 must be able to generate, can be lowered.
  • the energy requirement of the fume hood could be reduced by an amount that exceeds the energy requirement of the fan, which in turn has a positive effect on the overall energy balance of the fume hood.
  • a hollow profile 10, 20 designed according to an embodiment of the invention is shown in cross section, ie perpendicular to the longitudinal extension of the hollow profile 10, 20.
  • the outer inflow side 10a, 20a is aerodynamically optimized as an airfoil profile.
  • Inside the hollow profile 10, 20 there is a pressure chamber 10b, 20b.
  • the compressed air generated by the fan 70 flows through the pressure chamber 10b, 20b along the longitudinal extent of the hollow profile 10, 20.
  • Also along the longitudinal extent of the hollow profile 10, 20 are preferably a large number of outlet openings 10d, 20d, through which the compressed air escapes into the interior of the fume hood can.
  • the multiplicity of spatially separated outlet openings 10d, 20d are arranged in the hollow profile 10, 20 according to the respective purpose of use of the fume hood 1. They can be distributed irregularly over the length of the hollow profile 10, 20 or can be arranged according to a specific pattern or even equidistantly and regularly from one another.
  • the hollow profiles 10, 20 can preferably be designed in one piece with the respective side wall 36 and/or the base plate 34, e.g. as an extruded aluminum profile. It is also conceivable to attach and fix the hollow profiles 10, 20 to the end face of the respective side wall 36 and/or the base plate 34, or to attach them in some other way.
  • the geometry shown can be used both on the side post hollow profiles 10 and on the hollow profile 20 arranged on the front face of the worktop or base plate 34 .
  • the side post profile is sometimes referred to as the first hollow profile 10 and the base plate profile as the second hollow profile 20 in this description and the patent claims.
  • hydraulic diameter In order to be able to compare various channels through which a fluid flows with different cross-sectional shapes, the so-called hydraulic diameter is used.
  • hydraulic diameter is well known to those skilled in the art and represents an operand that specifies the diameter of a flow channel with any cross-section which, with the same length and the same mean flow rate, has the same pressure loss as a flow pipe with a circular cross-section and same diameter.
  • the longitudinal dimension of the outlet openings 10d, 20d ie the extent of the outlet openings 10d, 20d in the longitudinal direction of the hollow profiles 10, 20, is 30 mm and the transverse dimension is perpendicular thereto equal to 2mm.
  • the surface area of the outlet openings 10d, 20d is preferably only 1 mm 2 to 4 mm 2 and more preferably 1.8 mm 2 to 3 mm 2 .
  • the outlet openings 10d, 20d can preferably have a circular, round, oval, rectangular or polygonal shape.
  • the longitudinal extent of the almost rectangular outlet openings 10d, 20d is preferably 3 mm and the transverse dimension perpendicular thereto is preferably 1 mm. This gives a hydraulic diameter of 1.5 mm.
  • a hollow profile 10, 20 with outlet openings 10d, 20d designed in this way was also used in the series of measurements carried out within the scope of the invention. In the following, this hollow profile 10, 20 is also referred to as "jet nozzles”.
  • At least one outlet opening 10d, 20d are fluidically connected to the pressure chamber 10b, 20b via a channel 10c, 20c having a length L ( 4 ).
  • the length L of the channel is preferably 9 mm.
  • the ratio of the length L to the hydraulic diameter (1.5 mm) is therefore equal to 6.
  • the channel 10c, 20c which is fluidly connected to preferably one outlet opening 10d, 20d, should have a length L that is at least 3 times, preferably 4 times to 11 times of the hydraulic diameter of the outlet opening 10d, 20d. Only with a duct length L that fulfills this condition are jets of compressed air released into the interior of the fume cupboard, which are "given" a direction that is significantly more pronounced than with air jets that only have to pass through a shorter duct. This reduces the
  • Opening angle of the compressed air jets 100, 200 spreading in the interior of the fume hood are already directed so strongly at the time they leave the outlet openings 10d, 20d that they are as close as possible to the side walls 36 and the base plate 34.
  • the hollow profile 10, 20 used in the conventional Secuflow® laboratory fume hood and extruded from aluminum had a thickness of 2 mm, ie the channel in front of the outlet opening had a length L of only 2 mm.
  • the ratio of the length L to the hydraulic diameter (3.75 mm) was thus significantly less than 1.
  • the angle ⁇ ( 4 ), which the channel 10c, 20c, which preferably extends in a straight line, encloses relative to the side wall 36 and/or to the base plate 34, is preferably in a range from 0° to 10°.
  • an air jet that runs through a duct that includes an angle of 0° to the associated side wall or base plate will not propagate absolutely parallel to the side wall or base plate in the interior of the fume hood. This is due to the fact that the mean velocity vector will always assume an angle greater than 0° to the side wall 36 or to the base plate 34, even with parallel blow-out.
  • the periodic oscillation is preferably generated by self-excitation and preferably with the help of non-moving components, which are preferably formed in one piece with the hollow profile 10', 20'.
  • non-moving components which are preferably formed in one piece with the hollow profile 10', 20'.
  • Fluidic oscillators are characterized in that they generate a self-excited oscillation in the fluid passing through them. This oscillation results from the splitting of the fluid flow into a main flow and a partial flow. While the main stream flows through a main channel 10c', 20c', the partial stream flows alternately through one of the two secondary channels 10f', 20f' ( figure 5 ). In the area of the outlet opening 10d', 20d', the partial flow meets the main flow again and deflects it alternately downwards or upwards, depending on which secondary channel 10f, 20f' the partial flow had previously passed through. Because of the alternately changing pressure conditions in the side channels 10f', 20f, the partial flow flows through the respective other side channel 10f', 20f' in the next cycle.
  • the outlet opening 10d', 20d' is fluidly connected to a pressure chamber 10b', 20b' via a channel 10c', 20c' (here the main channel) having a length L.
  • the channel length L is at least 3 times, preferably 4 times to 11 times the hydraulic diameter of the outlet opening 10d', 20d'.
  • the longitudinal extension of the substantially rectangular outlet opening 10d', 20d' is 1.8 mm and the extension perpendicular thereto is 1 mm. This gives a hydraulic diameter of 1.3 mm.
  • the channel length L is preferably 14 mm and thus approximately 11 times the hydraulic diameter.
  • nozzle geometries that generate a non-periodic jet of compressed air are conceivable, not according to the invention.
  • such nozzle geometries produce a roaming, stochastically moving jet of compressed air.
  • feedback-free fluidic components can be used to generate such non-periodic compressed air jets.
  • FIG. 6 shows the result of PIV measurements of the flow field of the wall jets emitted from the side mullion profile 10 using the conventional nozzle geometry of the Secuflow ® hood ( Figure 6A ), the jet nozzle geometry ( Figure 6B ) and the OsciJet nozzle geometry ( Figure 6C ).
  • the fan voltage was at the in 6 measurements shown is 9.85V.
  • a method for determining the minimum volume flows was then developed.
  • the corresponding experimental setup is in the Figs. 7 and 8th shown.
  • the volume flow of the wall jets is determined in two steps. As in 7 is shown, the control voltage of the fan 70 is adjusted with the aid of a voltage regulator 72 to a value at which the flow field of the wall jets, verified with the aid of PIV measurements, shows almost no significant flow separations.
  • the static pressure within the hollow profiles 10, 10' and 20, 20' is then determined at the measuring points 1, 2, 3, 4, 5 and 6.
  • a pressure sensor 80 is used for this purpose, which preferably measures the static pressure in the pressure chambers 10a, 10a' and 20a, 20a' of the hollow profiles 10, 10' and 20, 20' via respective pressure sensor lines 82.
  • the pressure sensor lines 82 are preferably arranged in such a way that their pressure-chamber-side end ends flush with an inner surface of the respective pressure chamber 10a, 10a' and 20a, 20a'.
  • a hollow profile 10 with jet nozzles is used on the left side post and a hollow profile 10' with OsciJet nozzles is used on the right side post.
  • a second measurement step as in 8 can be seen, the fan 70 is replaced by a compressed air connection 74 .
  • a calibrated pressure reducer or mass flow controller 76 is arranged downstream of the compressed air connection 74 .
  • the mass flow controller used here was from Teledyne Hastings Instruments, series 201. After setting the static reference air pressure determined in the first measuring step in the The mass flow associated with the hollow profiles 10, 10' and 20, 20' can thus be determined with the aid of the mass flow controller.
  • the volume flow can be calculated from the respective mass flow, taking into account the ambient pressure and the ambient temperature.
  • the resulting volume flows are in 10 listed.
  • the required minimum volume flow is reduced by 68% in the Jet version and by 76% in the OsciJet version compared to the Secuflow ® series fume hood.
  • the inventors have concluded that due to the greatly reduced volume flows, it is now possible to use a fully-fledged fume hood, i. H. to operate a fume hood that meets the DIN EN 14175 series of standards in accordance with the regulations with a compressed air system that is usually available in the building.
  • a compressed air system that is usually available in the building.
  • the person skilled in the art is aware that such compressed air systems installed on the building side can usually provide an air pressure in a range from 0 to 7 bar. A power-driven fan is not necessary.
  • outlet openings 10d, 10d' of the side post profile 10, 10' and not all outlet openings 20d, 20d' of the base plate profile 20, 20' which are intended for the output of wall rays 100 or ground rays 200 in the respective hollow profile 10, 20, according to the invention, the in 4 or figure 5 have nozzle geometry shown in order to realize the object specified in the claims. It is therefore sufficient that at least one outlet opening 10d, 10d' of the side post profile 10, 10' and/or at least one outlet opening 20d, 20d' of the base plate profile 20, 20' is/are designed in this way. The same applies to the length L of the channel 10c, 10c' and 20c, 20c', which is provided directly upstream of the respective outlet opening 10d, 10d' and 20d, 20d'.

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  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
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  • General Engineering & Computer Science (AREA)
  • Devices For Use In Laboratory Experiments (AREA)
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Claims (20)

  1. Sorbonne (1), destinée à un laboratoire, comportant un carter (60), dans lequel se trouve un espace de travail, qui est délimité sur sa face avant par une guillotine (30), sur son fond par une plaque de fond (34) et latéralement, chaque fois par une paroi latérale (36), et un premier profilé creux (10, 10') placé sur une face frontale avant de chaque paroi latérale (36), chaque premier profilé creux (10, 10') définissant une première chambre de pression (10b, 10b'), qui est fluidiquement reliée avec une pluralité de premiers orifices (10d, 10d'), hors desquels des jets d'air sous la forme de jets de paroi (100) constitués d'air comprimé peuvent être délivrés dans l'espace de travail le long de la paroi latérale (36) en question,
    la dimension des premiers orifices (10d, 10d') et la pression d'air prévalant dans la première chambre de pression (10b, 10b') en cas d'une utilisation selon les règles de l'art de la sorbonne étant sélectionnées de telle sorte, que la première chambre de pression (10b, 10b') puisse être fluidiquement reliée avec un système d'air comprimé (74) installé dans le bâtiment, sans que l'on n'assiste à un décollement du flux des jets de paroi (100) de la paroi latérale (36) dans une zone de la face avant de l'espace de travail jusqu'à au moins 25 % de la profondeur de l'espace de travail, caractérisée en ce que par une géométrie des buses de ceux-ci, au moins l'un des premiers (10d, 10d') orifices est conçu de telle sorte que le jet d'air comprimé quittant le premier (10d, 10d') orifice soit délivré dans l'espace de travail sous la forme d'un jet de paroi (100) à oscillation périodique.
  2. Sorbonne (1), destinée à un laboratoire, comportant un carter (60), dans lequel se trouve un espace de travail (3), qui est délimité sur sa face avant par une guillotine (30), sur son fond par une plaque de fond (34) et latéralement, chaque fois par une paroi latérale (36), et un deuxième profilé creux (20, 20') placé sur une face frontale avant de la plaque de fond (34), le deuxième profilé creux (20, 20') définissant une deuxième chambre de pression (20b, 20b'), qui est fluidiquement reliée avec une pluralité de deuxièmes orifices (20d, 20d'), hors desquels des jets d'air sous la forme de jets de paroi (200) peuvent être délivrés dans l'espace de travail le long de la plaque de fond (34),
    la dimension des deuxièmes orifices (20d, 20d') et la pression d'air prévalant dans la deuxième chambre de pression (20b, 20b') en cas d'une utilisation selon les règles de l'art de la sorbonne étant sélectionnées de telle sorte, que la deuxième chambre de pression (20b, 20b') puisse être fluidiquement reliée avec un système d'air comprimé (74) installé dans le bâtiment, sans que l'on n'assiste à un décollement du flux des jets de fond (200) de la plaque de fond (34) dans une zone de la face avant de l'espace de travail jusqu'à au moins 25 % de la profondeur de l'espace de travail, caractérisée en ce que par une géométrie des buses de ceux-ci, au moins l'un des deuxièmes (20d, 20d') orifices est conçu de telle sorte que le jet d'air comprimé quittant le deuxième (20d, 20d') orifice soit délivré dans l'espace de travail sous la forme d'un jet de fond (200) à oscillation périodique.
  3. Sorbonne (1), qui présente les caractéristiques des revendications 1 et 2.
  4. Sorbonne (1) selon l'une quelconque des revendications précédentes, caractérisée en ce que l'on n'assiste à aucun décollement du flux des jets de paroi (100) de la paroi latérale (36) ou des jets de fond (200) de la plaque de fond (34) dans une zone de la face avant de l'espace de travail de jusqu'à au moins 50 % de la profondeur de l'espace de travail.
  5. Sorbonne (1) selon l'une quelconque des revendications précédentes, caractérisée en ce que l'on n'assiste à aucun décollement du flux des jets de paroi (100) de la paroi latérale (36) ou des jets de fond (200) de la plaque de fond (34) dans une zone de la face avant de l'espace de travail de jusqu'à au moins 75 % de la profondeur de l'espace de travail.
  6. Sorbonne (1) selon l'une quelconque des revendications précédentes, caractérisée en ce qu'il est prévu un premier et/ou un deuxième capteur(s) de pression (80), qui est/sont fluidiquement reliés avec le premier (10b, 10b') et/ou la deuxième (20b, 20b') chambre de pression.
  7. Sorbonne (1) selon la revendication 6, caractérisée en ce que le premier et/ou le deuxième capteur de pression (80) comprend une première et/ou une deuxième ligne(s) (82) de capteur de pression, qui est/sont placée(s) de telle sorte qu'une extrémité placée du côté chambre de pression de la première et/ou de la deuxième ligne (82) de capteur de pression se termine à fleur de surface d'une surface intérieure de la première (10b, 10b') et/ou de la deuxième (20b, 20b') chambre de pression.
  8. Sorbonne (1) selon l'une quelconque des revendications précédentes, caractérisée en ce qu'il est prévu un système de commande (76) qui est conçu de telle sorte que lors d'une utilisation selon les règles de l'art de la sorbonne, il règle la pression dans la première (10b, 10b') et/ou dans la deuxième (20b, 20b') chambre de pression dans un ordre de 50 Pa à 500 Pa, de préférence dans un ordre de 150 Pa à 200 Pa.
  9. Sorbonne (1) selon la revendication 8, si elle dépend de l'une quelconque des revendications 6 ou 7, caractérisée en ce que le système de commande (76) est électriquement connecté avec le premier et/ou le deuxième capteur de pression (80).
  10. Sorbonne (1) selon la revendication 8 ou 9, caractérisée en ce que le système de commande est un réducteur de pression ou un régulateur de débit massique (76), qui est placé en amont de la première (10b, 10b') et/ou de la deuxième (20b, 20b') chambre de pression.
  11. Sorbonne (1) selon la revendication 10, caractérisée en ce que le réducteur de pression ou le régulateur de débit massique (76) est placé(e) à l'intérieur du carter (60).
  12. Sorbonne (1) selon l'une quelconque des revendications précédentes, caractérisée en ce qu'une surface de section transversale d'au moins un premier (10d, 10d') et/ou d'au moins un deuxième (20d, 20d') orifice, vue à la perpendiculaire de la direction de flux, de préférence de tous les premiers et/ou deuxièmes orifices, se situe dans un ordre de 1 mm2 à 4 mm2.
  13. Sorbonne (1) selon l'une quelconque des revendications précédentes, caractérisée en ce qu'une surface de section transversale, vue à la perpendiculaire de la direction de flux, d'au moins un premier (10d, 10d') et/ou d'au moins un deuxième (20d, 20d') orifice, de préférence de tous les premiers et/ou deuxièmes orifices (10d, 10d'), se situe dans un ordre de 1,8 mm2 à 3 mm2.
  14. Sorbonne (1) selon l'une quelconque des revendications précédentes, caractérisée en ce que par une géométrie des buses de ceux-ci, tous les premiers (10d, 10d') et/ou deuxièmes (20d, 20d') orifices sont conçus de telle sorte que les jets d'air comprimé quittant les premiers (10d, 10d') et/ou les deuxièmes (20d, 20d') orifices soient délivrés dans l'espace de travail en tant que jets de paroi (100) à oscillation périodique et/ou en tant que jets de fond (200) à oscillation périodique.
  15. Sorbonne (1) selon la revendication 14, caractérisée en ce que la périodicité se situe dans un ordre de 1 Hz à 100 kHz, de préférence dans un ordre de 200 Hz à 300 Hz.
  16. Sorbonne (1) selon l'une quelconque des revendications 14 ou 15, caractérisée en ce que l'oscillation périodique du jet de paroi (100) et/ou du jet de fond (200) est susceptible d'être générée par uniquement des éléments constitutifs non mobiles du premier (10) et/ou du deuxième (20) profilé creux, qui sont conçus de préférence en monobloc.
  17. Sorbonne (1) selon l'une quelconque des revendications 14 à 16, caractérisée en ce que l'oscillation périodique du jet de paroi (100) et/ou du jet de fond (200) est susceptible d'être générée par auto-excitation.
  18. Sorbonne (1) selon l'une quelconque des revendications 14 à 17, caractérisée en ce qu'il est prévu au moins un premier et/ou au moins un deuxième oscillateur (11) fluidique, qui comprend/comprennent le premier (10d') et/ou le deuxième (20d') orifice, en ce qu'il est prévu de préférence une pluralité de premiers et/ou de deuxièmes oscillateurs fluidiques, lesquels comprennent chacun un premier (10d') et/ou un deuxième orifice (20d'), et sont conçus de sorte à générer l'oscillation périodique du jet de paroi/des jets de paroi (100) et/ou l'oscillation périodique du jet de fond/ des jets de fond (200).
  19. Sorbonne (1) selon l'une quelconque des revendications précédentes, caractérisée en ce que les premiers (10d, 10d') et/ou les deuxièmes (20d, 20d') orifices présentent une forme circulaire, rond, ovale, à angle droit ou polygonale.
  20. Sorbonne (1) selon l'une quelconque des revendications précédentes, caractérisée en ce qu'au moins un premier (10d, 10d') et/ou un deuxième (20d, 20d') orifice sont fluidiquement reliés par l'intermédiaire d'une première (10c, 10c') et/ou d'une deuxième (20c, 20c') canalisation oblongue avec la première (10b, 10b') et/ou la deuxième (20b, 20b') chambre de pression, et en ce que la première (10c, 10c') et/ou la deuxième (20c, 20c') canalisation présente une longueur L qui s'élève à au moins le triple du diamètre hydraulique d'une surface de section transversale, vue à la perpendiculaire de la direction de flux de l'orifice associé.
EP17823174.2A 2016-12-29 2017-12-28 Sorbonne de laboratoire à jets de paroi et/ou de fond Active EP3562600B8 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016125890.3A DE102016125890A1 (de) 2016-12-29 2016-12-29 Laborabzug mit Wandstrahlen
PCT/EP2017/084704 WO2018122302A1 (fr) 2016-12-29 2017-12-28 Sorbonne de laboratoire à jets de paroi

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EP3562600A1 EP3562600A1 (fr) 2019-11-06
EP3562600B1 true EP3562600B1 (fr) 2022-08-10
EP3562600B8 EP3562600B8 (fr) 2022-12-28

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EP (1) EP3562600B8 (fr)
JP (1) JP6669684B2 (fr)
KR (1) KR20190103169A (fr)
CN (1) CN110114153B (fr)
AU (1) AU2017387829A1 (fr)
CA (1) CA3048534A1 (fr)
DE (1) DE102016125890A1 (fr)
TW (1) TWI678239B (fr)
WO (1) WO2018122302A1 (fr)

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CN110180855A (zh) * 2019-06-24 2019-08-30 北京成威博瑞实验室设备有限公司 一种实验室通风柜
DE102020132826B3 (de) 2020-12-09 2022-05-25 Waldner Laboreinrichtungen Gmbh & Co. Kg Laborabzug mit Strömungsgeräuschreduzierung
KR102500454B1 (ko) * 2021-04-26 2023-02-20 쏠코리아 주식회사 실험실 흄후드
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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CN205253705U (zh) * 2015-12-09 2016-05-25 深圳市华中实验室设备有限公司 一种多功能节能通风柜

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Publication number Publication date
EP3562600B8 (fr) 2022-12-28
EP3562600A1 (fr) 2019-11-06
US20190351465A1 (en) 2019-11-21
WO2018122302A1 (fr) 2018-07-05
DE102016125890A1 (de) 2018-07-05
CN110114153A (zh) 2019-08-09
TW201829084A (zh) 2018-08-16
KR20190103169A (ko) 2019-09-04
JP6669684B2 (ja) 2020-03-18
CA3048534A1 (fr) 2018-07-05
JP2018108568A (ja) 2018-07-12
TWI678239B (zh) 2019-12-01
AU2017387829A1 (en) 2019-07-25
CN110114153B (zh) 2022-06-10

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