EP3247496B1 - Dispositif d'aspiration comportant un système d'aspiration régulé - Google Patents

Dispositif d'aspiration comportant un système d'aspiration régulé Download PDF

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Publication number
EP3247496B1
EP3247496B1 EP16700890.3A EP16700890A EP3247496B1 EP 3247496 B1 EP3247496 B1 EP 3247496B1 EP 16700890 A EP16700890 A EP 16700890A EP 3247496 B1 EP3247496 B1 EP 3247496B1
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EP
European Patent Office
Prior art keywords
air inlet
working space
air
exhaust
exhaust device
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EP16700890.3A
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German (de)
English (en)
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EP3247496A1 (fr
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Konrad Kreuzer
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Individual
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    • 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
    • B01L1/04—Dust-free rooms or enclosures
    • 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
    • B01L2200/14—Process control and prevention of errors
    • B01L2200/143—Quality control, feedback systems
    • 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
    • B01L2200/14—Process control and prevention of errors
    • B01L2200/143—Quality control, feedback systems
    • B01L2200/147—Employing temperature sensors

Definitions

  • the present invention relates to a trigger device, in particular for laboratory areas.
  • Discharge devices in particular for laboratories, have long been known from the prior art. These are dealt with in particular in the standard DIN EN 14175 (see sections 1 to 7 there). Deduction devices are designed to provide a safe workplace environment for scientists, engineers and medical professionals working in dangerous / hazardous materials laboratories. Usually deduction devices are connected to existing ventilation units / exhaust air systems to suck air from a working space enclosed by the extraction device. Typically, draw-off devices are provided with different ports, for example, to carry liquid and / or gaseous media to or in the trigger device.
  • a trigger device With regard to the general structure of a trigger device is based on the German patent application DE 10 2014 202 271 with reference to the Applicant's Modular Deduction Device .
  • a modular extraction device in particular for laboratory areas is disclosed which discloses a work space enclosing housing with side walls and a ceiling wall.
  • the walls of this modular extraction device comprise profile elements between which plate elements are detachably arranged.
  • the present invention is particularly preferably used with such a modular extraction device.
  • Section 6 of the standard DIN EN 14175 defines the additional requirements for extraction devices that are to be operated with a variable air volume.
  • Section 7 of the standard DIN EN 14175 defines additional requirements for exhaust devices that are operated with increased heat load (for example, Bunsen burners or other heat sources can be installed in such exhaust systems).
  • a take-off device with a working space, wherein at least one of the sides is formed by a movable window slider.
  • a suction device is provided to remove air from the working space to filter by means of appropriate filter arrangements and to give them back into the environment.
  • the air is extracted by four independent extraction modules, which are connected in series in the ceiling area. These extraction modules are controlled and controlled by a master module.
  • US 5 716 267 A a fume hood with a closed working area and a primary and secondary exhaust air arrangement.
  • the primary exhaust arrangement is used to absorb vapors from the entire work area.
  • the secondary exhaust assembly is connected via a conduit to the primary exhaust assembly and includes a collection head to remove smoke from a small portion of the work area.
  • take-off devices which can be operated with an increased heat load.
  • the document discloses DE 40 40 723 A1
  • Such a take-off device which in principle can only be operated under heat load.
  • the present invention has the object to provide a take-off device that can be safely operated both without heat load (in so-called cold operation) as well as increased heat load, which can be operated with a comparatively low energy consumption and beyond Furthermore, it is compact and can be used over a comparatively wide control range / operating range.
  • An extraction device in particular for laboratory areas, comprises: a housing enclosing a working space with side walls and a ceiling wall, wherein at least one of the side walls comprises a movable window slider; a controllable suction device to guide air from the working space via at least one exhaust air connection in an exhaust system, wherein the suction device comprises at least two separate air inlet openings, which are fluidly connected to different areas of the working space and their volume flows are independently adjustable and adjustable, wherein the Volume flows of the air inlet openings and the proportionate ratio of the volume flows to each other in response to operating parameters is controlled, which are detected by means of sensors, which can be controlled by the air inlet openings of the exhaust air volume flow and the air distribution in the working space.
  • at least one of the air inlet openings is fluidically connected to a lower region and at least one of the air inlet openings is fluidically connected to an upper region of the working chamber in order to guide air out of the working chamber in each of these regions.
  • the separate air inlet openings of the suction device are fluidically connected to different areas of the working space, so that by the proportionate ratio of the volume flows to each other (for example, in Volume percent specified) and by the total amount of discharged air (ie by the exhaust air volume flow, which is led out of the work space), the air distribution in the working space can be regulated or adjusted.
  • an air roll can be formed in the working space, wherein the shape, size and rotational speed of the air roll, as well as the position of the air roll can be adjusted by the control of the air inlet openings.
  • an air flow without air roll which are substantially laminar from bottom to top (ie from the window slider into the suction) are provided in order to "empty" the working space quickly.
  • the take-off device is preferably arranged on a table construction such that the (vertically) movable window slider is positioned with its lower edge at a height of about 900 mm in the closed state (i.e., the table construction has a height of about 900 mm substantially).
  • the window slider also has a height of about 900 mm, so that the window slider is arranged at the arrangement of the extraction device on the table construction, at a height of between 900 mm to about 1800 mm.
  • the lower edge of the window slider is located approximately at a height of 1350 mm.
  • the fully open state of the window slider is typically not a working position, but is merely needed for maintenance.
  • the extraction device is preferably provided by corresponding frame racks made of steel or aluminum, which can be screwed together and between which the side walls or the ceiling wall can be arranged.
  • the sensor means comprise at least one temperature sensor for detecting the temperature in the working space and / or at least two temperature sensors for detecting a temperature difference between the working space and the surroundings.
  • the aim is to operate the extraction device generally in a range in which the fluid mechanics of the extraction device is stable, the critical temperature difference for each extraction device must be determined individually.
  • draw-off devices are typically fluidically unstable at a temperature difference between 4 and 6 ° K.
  • the sensor means comprise at least one position sensor for detecting the position of the movable window slider.
  • the position sensor thus the opening of the Window slider can be detected and the "open" area can be calculated.
  • a position sensor can be provided for example by a cable pull sensor, when the movable window slider is equipped by means of a corresponding cable system.
  • the sensor means comprise pollutant sensors for detecting pollutants in the working space and / or for detecting a pollutant difference between the working space and the environment.
  • pollutant sensors for detecting pollutants in the working space and / or for detecting a pollutant difference between the working space and the environment.
  • the latter may be of importance because diffusion processes may result due to the pollutant difference.
  • the sensor means comprise pressure sensors for detecting a pressure difference at least between one of the air inlet openings and the exhaust connection of the suction device.
  • the pressure difference before and after the air inlet opening is additionally detected at the at least one air inlet opening by means of pressure sensors in order to determine the pressure difference between the air inlet opening and the exhaust air connection.
  • at least one of the pressure sensors or advantageously all pressure sensors are designed as so-called venturi sensors. With the help of these pressure sensors, it is possible to measure the exhaust air volume flow discharged in the respective operating state (ie the total exhaust air volume) and determine in which capacity range the suction device is currently operated.
  • the sensor means comprise sensors for detecting the current operating state of the air inlet openings.
  • the air inlet openings can be adjusted by means of sliders and / or flaps between a fully open position and a fully closed position, wherein these operating conditions are detected by means of sensors, so that the air flow / volume flows guided through the air inlet openings can be detected.
  • the at least two air inlet openings are adjusted and regulated as a function of the detected operating parameters based on predefined operating states.
  • the possible operating states of the air inlet openings can be detected as a function of different operating parameters and based on this predefined control responses (which are stored for example in a memory unit of a control and control means) can be predefined.
  • the suction device comprises an air inlet box, an exhaust pipe and the exhaust port, wherein the at least two air inlet openings are arranged on the air inlet box. Furthermore, it is preferred that means for collecting and discharging condensate refluxing from the exhaust air system are provided on the air inlet box.
  • At least one of the air inlet openings is fluidly connected to a lower region and at least one of the air inlet openings is fluidly connected to an upper region of the working chamber in order to guide air out of the working chamber in each of these regions.
  • an air inlet opening can be fluidly connected to the lower region of the working space by means of a channel, which is preferably arranged between the rear wall of the extraction device and the working space.
  • the fluidic connection with the upper region of the working space can be provided, for example, by arranging the suction device on the ceiling wall of the extraction device and at least partially forming the ceiling wall as a perforated ceiling plate, so that air is discharged directly from the upper region of the working space through the air inlet opening can be.
  • the top wall of the extraction device is formed in two parts, wherein the part over which the suction device is arranged is formed as a perforated plate, preferably the rear part of the ceiling wall and the front part of the ceiling wall is designed as a transparent plate, so that In this area, a lighting device can be provided.
  • a lighting device can be provided.
  • Such an arrangement or fluidic connection of the air inlet openings is particularly preferred, since thereby the air distribution or the fluid mechanics in the working space can be influenced particularly advantageous.
  • a roller-shaped flow geometry of the air is provided in the working space or such training is supported.
  • the suction device comprises at least three air inlet openings, wherein at least one air inlet opening are fluidly connected to a lower area and at least two air inlet openings fluidly connected to an upper portion of the working space to each lead in these areas air from the working space.
  • the volume flow through one of the air inlet openings amounts to a maximum of between 400 and 600 m 3 per hour, particularly preferably between 450 and 500 m 3 per hour.
  • the volume flow through one of the air inlet openings amounts to a maximum of between 400 and 600 m 3 per hour, particularly preferably between 450 and 500 m 3 per hour.
  • Deductions are usually made with outside widths between 1.2 and 2.1 meters.
  • the exhaust air volume of prints is often displayed in m 3 per hour and meter in order to compare different prints.
  • the unit m is then displayed as the outer width of the trigger in meters.
  • a fume hood with an external width of 1.2 meters requires an exhaust air volume of about 480 m 3 per hour, while a fume hood with an external width of 2.1 meters requires an exhaust air volume of about 820 m 3 per hour.
  • the at least two air inlet openings which are fluidically connected to the upper region of the working space, are set and regulated in parallel. Furthermore, it is advantageous if all air inlet openings are set and regulated in parallel. In other words, the air inlet openings in this operating mode have substantially equal volume flows.
  • the air inlet openings are designed as flap arrangements, which are arranged on the air inlet box of the suction device.
  • the pressure difference between the air inlet opening, which is fluidically connected to the lower region of the working chamber and the exhaust air connection is preferably determined.
  • an alternative to the detection of the pressure difference in the document DE 195 45 948 A1 disclosed measuring structure can be used to improve the measurement accuracy and the control spread.
  • the extraction device comprises Nachströmö Maschinenen, so that even with fully closed window slider air can flow into the working space.
  • Such Nachströmö réelleen are typically provided above and below the window slider on the front of the trigger device.
  • Such Nachströmö réelleen are in particular for a so-called night mode, in which the window slider is completely closed, an advantage to be able to provide sufficient air exchange or sufficient suction in this operating condition can.
  • the extraction device comprises input, output and / or display means. This makes it possible to indicate to the operator the current operating state of the trigger device or by means of appropriate controls, the operator can switch the operating state of the trigger device, for example, from a regular operation in a night mode. Furthermore, it is advantageous if the trigger device comprises optical and / or acoustic alarm means. This gives the possibility to warn the laboratory personnel, for example, if a critical temperature is reached in the working space or the flow within the working space is unstable and there is a risk that pollutants can escape from the working space in the laboratory. Further, there is the possibility that the user manually rinses the exhaust device (i.e., substantially all of the working space is exhausted by the exhaust device by laminar flow).
  • the extraction device comprises, in addition to the extraction by the suction device no further suction, in particular no on the side or back walls.
  • the extraction device comprises means to guide support jets in the working space and thereby to influence the air introduction into the interior and the flow guidance.
  • Such means may for example be provided by nozzle arrangements.
  • FIG. 1 shows a schematic front view of a preferred embodiment of a trigger device 100, which is arranged on a table frame 110. In the upper area of the withdrawal device 100, a controllable suction device 120 is arranged.
  • the withdrawal device 100 is made of (preferably multi-part) vertical profile elements 130 which run from the table frame 110 up to and including the suction device 120 and correspondingly horizontally arranged profile elements 140.
  • a window slider 150 is provided at the front of the trigger 100.
  • an optional slot 160 for receiving terminals and controls is also provided.
  • FIG. 2 shows a schematic cross-sectional view of the trigger 100 on FIG. 1 , Identical parts are provided with identical reference numerals.
  • the suction device 120 is disposed in the upper region of the haul-off device 100, namely above a partially perforated ceiling plate 170.
  • the ceiling plate 170 is formed in the rear area (ie in the area below the suction device 120) perforated and transparent in a front area formed so that a by the exhaust device 100 enclosed working space 180 by a above the transparent part of the ceiling plate 170 arranged lighting device 190 can be illuminated.
  • the suction device 120 is fluidically connected to a lower region of the working space 180 by means of a channel 210 formed by an intermediate wall 200 and the rear wall of the drawing device 100, as well as to the upper region of the working chamber 180 FIG. 2 Also clearly visible, the suction device 120 is further fluidly connected to an exhaust air system 220.
  • the withdrawal device 100 comprises Nachströmö réelleen 230, so that even in the closed state of the window slider 150, a certain volume flow can enter the working space 180.
  • the window slider 150 is movably supported by a cable system 240.
  • the table structure 110 has a height of about 900 mm
  • the window slider also has a height substantially of 900 mm, so that the lower edge of the window slider between a height of 900 mm (in the closed state) to about in a height of 1800 mm (in the fully opened state) is movably mounted.
  • a typical working and / or engagement position is provided here approximately at a height of 1350 mm.
  • FIGS. 4 to 5 show schematic horizontal views of the preferred extraction device 100, wherein in turn the same parts are provided with identical reference numerals.
  • a take-off device 100 according to the invention laterally from the window slider 150 preferably comprises multi-part vertical profile arrangements, by means of which vertical channels 250 are formed.
  • internals eg supply or discharge for media, fittings, valves, sockets, switches, security devices, etc.
  • FIG. 6 shows a schematic cross-sectional view of a controllable suction device 120, by means of which the exhaust air volume flow, which is guided into the exhaust air system 220 and the air distribution in the working space 180 can be controlled.
  • the suction device 120 preferably comprises an air inlet box 121, an exhaust pipe 122 and an exhaust port 123. In the region of the air inlet box 121, three flap arrangements 124, 125, 126 are provided.
  • the air inlet box 121 preferably has a substantially rectangular cross section of about 400 ⁇ 400 mm and a height of about 150 mm.
  • the flap assemblies 124, 125, 126 are preferably dimensioned such that the maximum volume flow that can be passed through one of the flap assemblies 124, 125, 126 (ie through one of the air inlet openings) is between 400 and 600 m 3 per hour, preferably between 450 and 500 m3 per hour.
  • the front flap assemblies 124, 125 are fluidly connected to the upper portion of the working space 180, which is guided through the perforated portion of the top plate 170, wherein the rear flap assembly 126 fluidly connected to the lower portion of the working space 180 via the channel 210, through the Intermediate wall 200 is formed, is connected.
  • the controllable suction device 120 comprises a measuring device 127, which is designed to measure the pressure difference between the exhaust port 123 and the air inlet box 121.
  • the measuring device 127 comprises at least three measuring points MS1, MS2 and MS 3 , which are preferably provided by means of Venturi sensors.
  • the pressure directly at the air inlet box 121 can be measured by the measuring point MS2.
  • the measuring device 127 also includes a solenoid valve 128th
  • sensors are provided (not shown) which can detect the exact flap position, so that the volume flow which is guided through the respective flap arrangements 124, 125, 126 or the exhaust air volume flow can be determined.
  • the flaps of the flap assemblies 124, 125, 126 are preferably designed such that the flaps allow closure of the flap arrangements approximately at an angle of 70 °, so that no further sealing stops must be provided.
  • the two front flap assemblies 124, 125 which are fluidly connected to the upper portion of the working space 180, are controlled / driven in parallel.
  • the pressure measuring hoses are preferably connected to the ambient air, so that the soiled or corrosive atmosphere of the working space 180 can be removed.
  • the volume flows respectively guided through the flap arrangements 124, 125, 126 can thus be set and distributed separately from one another.
  • only one flap arrangement can be used; at medium exhaust air flow rates, a half split on the front and rear flap arrangements can be made possible; in night mode
  • a very low exhaust air volume flow can be achieved by closing the front flap arrangements 124, 125 and only controlling or activating the rear flap arrangement 126 so that night operation with very low exhaust air volume flows can be made possible even with larger take-off devices.
  • the measuring device 127 may be switched in the control mode between the two measuring points MS2 and MS3, and are thus monitored, and 3 very low exhaust flow rates can be accurately measured and controlled by the measuring point MS.
  • the extraction device according to the invention can be operated with comparatively high inflow speeds of up to 0.5 m per second (which is required in particular in laboratories in Anglo-Saxon countries).
  • FIG. 7 shows a schematic cross-sectional view of another controllable suction device 120 ', by means of which the exhaust air volume flow, which is guided into the exhaust air system 220 and the air distribution in the working space 180 can be controlled.
  • the suction device 120 ' preferably comprises an air inlet box 121', an exhaust pipe 122 'and an exhaust port 123'.
  • an air inlet box 121 ' In the area of the air inlet box 121 ', in turn, three flap arrangements 124', 125 ', 126' are provided.
  • the flap assemblies 124 ', 125', 126 ' are preferably dimensioned such that the maximum volume flow that can be passed through one of the flap assemblies 124', 125 ', 126' (ie through one of the air inlet openings) is between 400 and 600 m 3 per hour, preferably between 450 and 500 m3 per hour.
  • the front flap assemblies 124 ', 125' are fluidly connected to the upper portion of the working space 180, which is guided through the perforated portion of the ceiling plate 170, wherein the rear flap assembly 126 ' fluidically connected to the lower region of the working space 180 via the channel 210, which is formed by the intermediate wall 200.
  • controllable suction device 120 ' also comprises a measuring device 127', which is set up to measure the pressure difference between the exhaust port 123 'and the air inlet box 121'.
  • the measuring device 127 ' also comprises at least three measuring points MS1', MS2 'and MS3', which are preferably provided by means of venturi sensors.
  • the pressure directly at the air inlet box 121' can be measured by the measuring point MS2 '.
  • the measuring setup shown measures in FIG. 7 shown measurement structure not in front of and behind the flap assembly 126 '(ie not the differential pressure of the flap assembly 126') but only behind the flap assembly 126 '.
  • the in FIG. 7 shown measurement structure thus provides a to the in FIG. 6 Depending on the requirements on the spreading of the air quantity and this simplified measurement structure can be used in a trigger device according to the invention.
  • sensors are provided (not shown) which can detect the exact flap position, so that the volume flow which is guided through the respective flap arrangements 124 ', 125', 126 'or the exhaust air volume flow can be determined.
  • flaps of the flap assemblies 124 ', 125', 126 ' are preferably formed such that the flaps allow approximately at an angle of 70 ° closing the flap assemblies, so that no further sealing stops must be provided.
  • the two front flap assemblies 124 ', 125' which are fluidly connected to the upper portion of the working space 180, are parallel controlled / driven.
  • the pressure measuring hoses are preferably connected to the ambient air, so that the soiled or corrosive atmosphere of the working space 180 can be removed.
  • the measuring device 127 ' can be switched in normal operation between the two measuring points MS2' and MS 3 'and thus monitored, which can be accurately measured and controlled by the measuring point MS 3 ' low exhaust air flow rates.
  • FIG. 8 shows the dependence of the volume flow of the measured differential pressure, by the measuring device 127 (see. FIG. 6 ) between the air inlet box 121 and the exhaust port 123 is measured. Different control ranges are shown.
  • the characteristic DN 200 provides a control range of 100 to 550 m3 per hour for small draw-off devices, the characteristic DN 250 a control range of 200 to 850 m3 per hour for medium draw-offs and the characteristic DN 315 a control range of 300 to 1500 m3 per hour for large ones Discharge devices.
  • V is the volume flow
  • C is the throttle factor
  • ⁇ p is the detected pressure difference.
  • the characteristic curve M1 represents the signal generated by the measuring device 127 '(cf. FIG. 7 ) measured differential pressure.
  • control unit may control the flap positions of the flap assemblies 124, 125, 126, 124 ', 125', 126 'to increase the volume flows of the individual flap assemblies 124, 125, 126, 124', 125 ', 126' regulate, and thus the exhaust air volume flow of the suction device 120, 120 ', and the proportionate ratio of the volume flows of the flap assemblies 124, 125, 126, 124', 125 ', 126' to each other, to regulate the air distribution in the working space.
  • FIG. 10 shows exemplarily the flap positions of the flap assemblies 124, 125, 126 for a control range of 100 to 550 m 3 per hour (ie for DN 200), wherein the individual pressure sensor signals were given with corresponding numerical values.
  • the suction device 120 applies, except for data acquisition at the rear flap assembly 126', the corresponding.
  • FIG. 11 schematically shows the air flow profile in a working space 180 of a discharge device 100 according to the invention with the window sash 150 open at different temperatures.
  • isothermal operation ie the temperature in the working space 180 corresponds to the temperature of the environment
  • the exhaust air volume flow is directed approximately 50% through the front door assemblies 124, 125 and about 50% through the rear door assembly 126.
  • FIG. 10 can be clearly seen in the left partial image, forms in the working space 180, a rotating, stable exhaust air roller, which provides an orderly and stable flow of the working space 180.
  • the disadvantage here can be seen in the fact that the average residence time in the exhaust air roll is up to 120 seconds, so that it can lead to a "concentration" of pollutants here.
  • the controller detects this and alters the proportionate air distribution between the front flap assemblies 124, 125 and the rear flap assembly 126 (e.g., a 66% distribution to the front flap assemblies 124, 125 and 33% to the rear flap assembly 126).
  • a higher volume flow through the front flap assemblies 124, 125 is performed, so that in this way the flow distribution in the working space 180 is changed such that the air roll is reduced in total and moved into the front region of the working space 180.
  • this reduces the average residence time of the pollutants in the air roll.
  • this can also be the temperature difference can be reduced.
  • FIG. 11 In the right part of the image FIG. 11 is shown an operating situation with high thermal load, the temperature difference has already reached a critical value, so that the flow in the working space 180 has become unstable.
  • the exhaust air volume flow is increased between 30 and 50%.
  • at least 90% of the exhaust air volume flow is passed through the front flap assemblies 124, 125, so that essentially a laminar flow, which is sucked off, for example, at about 0.2 m per second, is formed.
  • no air roll is provided in this operating state, but the working space 180 as soon as possible (preferably within 10 to 20 seconds) flushed, ie the pollutants and the heated air within the working space 180 are completely removed.
  • the user can also switch this operating state manually.
  • FIG. 12 shows a schematic representation of the air flow in the working space 180 with the window sash 150 closed at different temperatures.
  • the isothermal operation is shown, in which 50% of the exhaust air volume flow through the front and rear Flap assemblies 124, 125, 126 are performed.
  • a relatively large rotating air roller forms in the working space 180, which ensures that a stable and substantially homogeneous mixing of the working space 180 takes place.
  • the disadvantage of this operating state is, in turn, that pollutants can linger up to 120 seconds in the working space 180 and therefore "concentration effects" can occur.
  • FIG. 11 shown in all sub-images in this operating state can pass through the Nachströmö réelleen 230 air in the working space 180.
  • an operating state with heat load in the working space 180 is shown.
  • the distribution between the rear and front flap assemblies 124, 125, 126 is varied so that about 90% of the exhaust air volume flow is passed through the front flap assemblies 124, 125, moreover the exhaust air volume flow is increased by about 50% is increased.
  • the rotating air roller decreases and is moved into the front part of the haul-off device 100.
  • the reduced air roller thus reduces the mean residence time of the pollutants in the exhaust device 100 and the temperature differences can be reduced accordingly. If the temperature difference reaches a critical value (which is preferably stored in the DDC unit), the exhaust air volume flow is increased up to the maximum value until the fault has diminished accordingly.
  • the extraction device 100 is shown in so-called night mode.
  • night mode the trigger device 100 is operated without thermal load and without active pollution.
  • the withdrawal device 100 serves as a kind of storage space.
  • the main objective in this operation is to operate the extraction device 100 as energy-efficiently as possible. This is of particular importance since exhaust devices operate a significant part of their life in this night mode. Therefore, a significant part of the energy consumption of a trigger device results the night mode.
  • FIG. 13 shows an exemplary controller parameterization of the exhaust air volume flow in dependence of the positioning of the window slider.
  • the exhaust air volume flow in addition to the above-described change in the proportionate volume flows of the valve assemblies) can be increased, the maximum exhaust air volume flow for a temperature difference, the size is set as the preset critical value for temperature difference and about 1.5 times represents the exhaust air volume flow in the control mode.

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  • Health & Medical Sciences (AREA)
  • Clinical Laboratory Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Devices For Use In Laboratory Experiments (AREA)

Claims (14)

  1. Dispositif d'aspiration (100), en particulier pour laboratoires, comprenant :
    - un boîtier enfermant un espace de travail (180) avec des parois latérales et une paroi de recouvrement (170), dans lequel au moins une des parois latérales comprend un coulisseau de vitre mobile (150) ;
    - un système d'aspiration régulable (120 ; 120') pour guider de l'air hors de l'espace de travail (180) dans un système d'air évacué par le biais d'au moins un raccord d'air évacué (123 ; 123'), dans lequel le système d'aspiration (120 ; 120') comprend au moins deux ouvertures d'entrée d'air (124, 125, 126 ; 124', 125', 126') séparées l'une de l'autre, qui sont reliées fluidiquement à différentes zones de l'espace de travail (180) et dont les débits volumiques sont réglables et régulables indépendamment l'un de l'autre, dans lequel les débits volumiques des ouvertures d'entrée d'air (124, 125, 126; 124', 125', 126') et le rapport proportionnel des débits volumiques sont régulés l'un par rapport à l'autre en fonction de paramètres de fonctionnement, qui sont détectés au moyen de moyens capteurs, dans lequel le débit volumique d'air évacué et la distribution de l'air dans l'espace de travail (180) sont régulables par les ouvertures d'entrée d'air (124, 125, 126 ; 124', 125', 126'), dans lequel au moins une des ouvertures d'entrée d'air (126 ; 126') est reliée fluidiquement à une zone inférieure et au moins une des ouvertures d'entrée d'air (124, 125 ; 124', 125') est reliée fluidiquement à une zone supérieure de l'espace de travail (180), pour guider respectivement dans ces zones de l'air hors de l'espace de travail (180).
  2. Dispositif d'aspiration (100) selon la revendication 1, dans lequel les moyens capteurs comprennent au moins un capteur de température (T1, T2) pour la détection de la température dans l'espace de travail (180) et/ou au moins deux capteurs de température (T1, T2) pour la détection d'une différence de température entre l'espace de travail (180) et l'environnement, et/ou
    dans lequel les moyens capteurs comprennent au moins un capteur de position pour la détection de la position du coulisseau de vitre mobile (150), et/ou
    dans lequel les moyens capteurs comprennent des capteurs de substances nocives pour la détection de substances nocives dans l'espace de travail (180) et/ou pour la détection d'une différence de substances nocives entre l'espace de travail (180) et l'environnement.
  3. Dispositif d'aspiration (100) selon l'une quelconque des revendications précédentes,
    dans lequel les moyens capteurs comprennent des capteurs de pression pour la détection d'une différence de pression au moins entre une des ouvertures d'entrée d'air (124, 125, 126 ; 124', 125', 126') et le raccord d'air évacué (123 ; 123') du système d'aspiration (120 ; 120'),
    dans lequel la différence de pression avant et après l'ouverture d'entrée d'air (124, 125, 126 ; 124', 125', 126') est détectée au moyen de capteurs de pression de préférence au niveau de l'au moins une ouverture d'entrée d'air (124, 125, 126; 124', 125', 126') pour déterminer la différence de pression entre l'ouverture d'entrée d'air (124, 125, 126 ; 124', 125', 126') et le raccord d'air évacué (123 ; 123'), et
    dans lequel de préférence au moins un capteur de pression est réalisé en tant que capteur Venturi.
  4. Dispositif d'aspiration (100) selon l'une quelconque des revendications précédentes,
    dans lequel les moyens capteurs comprennent des capteurs pour la détection de l'état de fonctionnement des ouvertures d'entrée d'air (124, 125, 126 ; 124', 125', 126').
  5. Dispositif d'aspiration (100) selon l'une quelconque des revendications précédentes,
    dans lequel les au moins deux ouvertures d'entrée d'air (124, 125, 126 ; 124', 125', 126') sont réglées et régulées en fonction des paramètres de fonctionnement détectés sur la base d'états de fonctionnement prédéfinis.
  6. Dispositif d'aspiration (100) selon l'une quelconque des revendications précédentes,
    dans lequel le système d'aspiration (120) comprend une boîte d'entrée d'air (121 ; 121'), un tube d'air évacué (122 ; 122') et le raccord d'air évacué (123 ; 123'), dans lequel les au moins deux ouvertures d'entrée d'air (124, 125, 126 ; 124', 125', 126') sont agencées au niveau de la boîte d'entrée d'air (121; 121'),
    dans lequel des moyens pour la collecte et l'évacuation de condensat refluant hors du système d'air évacué sont prévus de préférence au niveau de la boîte d'entrée d'air (123 ; 123').
  7. Dispositif d'aspiration (100) selon l'une quelconque des revendications précédentes,
    dans lequel le système d'aspiration (120; 120') comprend au moins trois ouvertures d'entrée d'air (124, 125, 126; 124', 125', 126'), dans lequel au moins une ouverture d'entrée d'air (126 ; 126') est reliée fluidiquement à une zone inférieure et au moins deux ouvertures d'entrée d'air (124, 125 ; 124', 125') sont reliées fluidiquement à une zone supérieure de l'espace de travail (180), pour guider respectivement dans ces zones de l'air hors de l'espace de travail (180),
    dans lequel de préférence les au moins deux ouvertures d'entrée d'air (124, 125 ; 124', 125'), qui sont reliées fluidiquement à la zone supérieure de l'espace de travail (180), sont réglées et régulées parallèlement, et
    dans lequel de préférence toutes les ouvertures d'entrée d'air (124, 125, 126 ; 124', 125', 126') sont réglées et régulées parallèlement.
  8. Dispositif d'aspiration (100) selon l'une quelconque des revendications précédentes,
    dans lequel les ouvertures d'entrée d'air (124, 125, 126 ; 124', 125', 126') sont réalisées en tant qu'agencement de valves (124, 125, 126 ; 124', 125', 126').
  9. Dispositif d'aspiration (100) selon l'une quelconque des revendications précédentes,
    dans lequel le débit volumique guidé hors de l'espace de travail (180) dans le système d'air évacué est entre 100 et 550 m3/h, 200 et 850 m3/h ou entre 300 et 1500 m3/h, et/ou
    dans lequel le débit volumique maximum, qui peut être guidé par une de l'ouverture d'entrée d'air (124, 125, 126 ; 124', 125', 126') se situe entre 400 et 600 m3/h, de préférence entre 450 et 500 m3/h.
  10. Dispositif d'aspiration (100) selon l'une quelconque des revendications précédentes,
    dans lequel le système d'aspiration (120 ; 120') est agencé au niveau de la paroi de recouvrement (170) du dispositif d'aspiration (100), et dans lequel la paroi de recouvrement (170) est réalisée en grande partie en tant que plaque de recouvrement percée (170), qui est reliée fluidiquement à au moins une ouverture d'entrée d'air (125, 126 ; 125', 126').
  11. Dispositif d'aspiration (100) selon l'une quelconque des revendications précédentes,
    dans lequel le coulisseau de vitre (150) fournit dans une position de travail ou de mise en prise, une ouverture d'une hauteur d'environ 450 mm et dans une position entièrement ouverte une ouverture d'une hauteur d'environ 900 mm.
  12. Dispositif d'aspiration (100) selon l'une quelconque des revendications précédentes,
    dans lequel le dispositif d'aspiration (100) comprend des ouvertures de circulation (230), de sorte qu'en cas de coulisseau de vitre (230) entièrement fermé, l'air peut aussi entrer dans l'espace de travail (180).
  13. Dispositif d'aspiration (100) selon l'une quelconque des revendications précédentes,
    dans lequel le dispositif d'aspiration (100) comprend des moyens d'entrée, de sortie et/ou d'affichage, et/ou
    dans lequel le dispositif d'aspiration (100) comprend des moyens d'alarme optiques et/ou acoustiques.
  14. Dispositif d'aspiration (100) selon l'une quelconque des revendications précédentes,
    dans lequel aucune autre aspiration n'est prévue hormis l'aspiration par le système d'aspiration (120 ; 120').
EP16700890.3A 2015-01-22 2016-01-18 Dispositif d'aspiration comportant un système d'aspiration régulé Active EP3247496B1 (fr)

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DE102015201026.0A DE102015201026B3 (de) 2015-01-22 2015-01-22 Abzugsvorrichtung mit geregelter Absaugeinrichtung
PCT/EP2016/050911 WO2016116408A1 (fr) 2015-01-22 2016-01-18 Dispositif d'aspiration comportant un système d'aspiration régulé

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CN106492890A (zh) * 2016-11-20 2017-03-15 合肥优亿科机电科技有限公司 一种四级水平细胞毒素安全柜
EP3919195B1 (fr) * 2020-06-03 2023-08-09 InnoGUARD UtvecklingsGrupp AB Sorbonne et procédé de commande d'une telle sorbonne
DE102020129412A1 (de) * 2020-11-09 2022-05-12 Lab-Concept GmbH Abzugsvorrichtung mit Volumenstromregelung

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EP3247496A1 (fr) 2017-11-29
DK3247496T3 (da) 2019-12-09
WO2016116408A1 (fr) 2016-07-28

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