EP3247496A1 - Exhaust device with controlled suction device - Google Patents
Exhaust device with controlled suction deviceInfo
- Publication number
- EP3247496A1 EP3247496A1 EP16700890.3A EP16700890A EP3247496A1 EP 3247496 A1 EP3247496 A1 EP 3247496A1 EP 16700890 A EP16700890 A EP 16700890A EP 3247496 A1 EP3247496 A1 EP 3247496A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- air inlet
- working space
- air
- exhaust
- inlet openings
- 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.)
- Granted
Links
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- 238000000429 assembly Methods 0.000 claims description 32
- 230000000712 assembly Effects 0.000 claims description 32
- 239000003344 environmental pollutant Substances 0.000 claims description 18
- 231100000719 pollutant Toxicity 0.000 claims description 18
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 230000004044 response Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims description 2
- 238000010992 reflux Methods 0.000 claims description 2
- 239000003570 air Substances 0.000 description 148
- 238000005259 measurement Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 239000003517 fume Substances 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000012080 ambient air Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
Classifications
-
- 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
- Discharge device with regulated suction device Discharge device with regulated suction device
- 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.
- Vent units / exhaust air systems connected to suck air from a working space enclosed by the extraction device.
- drawers typically, drawers with different
- Provided terminals for example, to lead liquid and / or gaseous media to or in the trigger 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 specifies additional requirements
- exhaust devices that are operated with increased heat load (for example, Bunsen burner or other heat sources can be arranged in such exhaust devices).
- take-off devices for example, from the documents US 5,924.92AA, US 7,470,176 and US 5,697,838, known
- Workspace can be provided.
- Deduction device which in principle can only be operated under thermal 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.
- Laboratory areas comprising: 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 air system, wherein the
- Extraction device at least two separate
- Air inlet openings whose volume flows are independently adjustable and controllable, 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 sensor means, wherein by the
- Air inlet openings of the exhaust air volume flow and the air distribution in the working space are adjustable.
- Working space can be regulated or adjusted.
- an air roller can be formed in the working space, wherein the control of the air inlet openings, the shape, size and
- Air roller can be adjusted. Furthermore, for example, with higher exhaust air flow rates, air flow without an air roll provided substantially laminar from bottom to top (i.e., from the window sash to the suction device) can quickly "deflate" the working space.
- the extraction device is preferably on a
- Table construction arranged 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 substantially a height of about 900 mm).
- 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 by appropriate
- 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 environment. This makes it possible to operate the controllable suction device as a function of the heat load in the working space or as a function of the detected temperature difference. Due to a possible temperature difference between the working space and the environment, different thermal layers may form in the working space due to differences in density at different temperatures. Distant ones can become due to too high
- Temperature difference of about 4 to 6 ° K can become unstable and massive it to a further increase in the temperature difference
- Pollutant emissions may occur. Furthermore, it was found that at temperature differences greater than 10 ° K pollutants can escape even when the window sash is closed (for example, by the so-called Nachströmö réelleen or between the side windows above the window slider).
- the aim is to operate the extraction device generally in a range in which the flow mechanics of the extraction device is stable, the critical temperature difference for each
- Extraction device must be determined individually. As already stated, 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
- Such a position sensor thus the opening of the Such a position sensor may be provided, for example, by a pull-wire sensor when the movable
- 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 significant because of the
- the sensor means comprise pressure sensors for detecting a pressure difference at least between one of the pressure sensors
- At the at least one air inlet opening additionally the pressure difference before and after the air inlet opening is detected by means of pressure sensors to the
- At least one of the pressure sensors or advantageously all pressure sensors are designed as so-called venturi sensors.
- Differential pressure measurement is disclosed which measures a pressure difference before and after a throttle to keep the pressure sensors in their optimum position Accuracy range to be able to operate at a
- 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, these operating conditions are detected by means of sensors, so that by the
- Air inlet openings guided air flow / volume flows can be detected.
- the at least two air inlet openings are based on the detected operating parameters
- pre-defined operating conditions set and regulated For example, as part of a calibration or installation process, 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 a
- At least one air inlet opening is provided.
- 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
- the suction device is arranged on the ceiling wall of the exhaust device and the ceiling wall is at least partially formed as a perforated ceiling plate, so that air can be discharged directly through the air inlet opening from the upper region of the working space.
- the top wall of the extraction device is formed in two parts, wherein the part over which the
- Suction device is arranged as a perforated plate is formed, 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 perforated plate is formed, 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.
- Air inlet openings is particularly preferred, since thereby the
- Air distribution and the fluid mechanics in the working space can be particularly advantageous influenced.
- a roller-shaped flow geometry of the air in the working space is particularly advantageous influenced.
- the suction device comprises at least three air inlet openings, wherein at least one air inlet opening are fluidly connected to a lower region and at least two air inlet openings fluidly connected to an upper region of the working space to lead in each of these areas air from the working space.
- Control ranges to DIN EN 14175 can be operated (DN 200 for a control range of 100 to 550 m3 per hour for small fume cupboards, DN 250 for a control range of 200 to 850 m3 per hour for medium fume cupboards, DN 315 for a control range of 300 to 1500 m3 per hour for large prints).
- 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.
- Air inlet opening which is fluidically connected to the lower region of the working space and determines the exhaust air connection.
- Measurement setup can be used to increase the measurement accuracy and the
- 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.
- 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 if, for example, a critical temperature in the working space is reached or the flow within the
- 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 for guiding support beams in the working space and thereby the
- Such means may, for example, by
- Nozzle arrangements are provided. Description of a preferred embodiment
- Figure 1 is a schematic front view of a preferred embodiment
- Figure 2 is a schematic sectional view of the preferred embodiment
- Figure 3 is a schematic plan view of the preferred embodiment
- Figure 4 is a schematic horizontal sectional view of
- Figure 5 is another schematic horizontal sectional view of the preferred embodiment
- Figure 6 is a schematic cross-sectional view of a controllable
- Embodiment is used;
- Figure 7 is a schematic cross-sectional view of another
- FIG. 8 is a printing line identification diagram
- Figure 9 is a schematic view of a control circuit for controlling and regulating the controllable suction device
- FIG. 10 shows different operating states of the suction device
- FIG. 11 shows the flow path in the working space at different
- Figure 12 is a schematic view of the flow in the
- Figure 13 is a diagram of the exhaust air flow rate in dependence on the position of the window slider.
- Figure 1 shows a schematic front view of a preferred embodiment
- Embodiment of a trigger device 100 which on a
- Table frame 110 is arranged. In the upper area at the
- a controllable suction device 120 is arranged.
- the extraction device 100 is made of (preferably multi-part) vertical profile elements 130, which from the table frame 110 to
- a window slider 150 is provided. At the
- Table frame 110 is also an optional slot 160 for receiving terminals and controls provided.
- FIG. 2 shows a schematic cross-sectional view of FIG
- Discharge device 100 on Figure 1 The same parts are provided with identical reference numerals.
- the suction device 120 is arranged in the upper region of the extraction device 100, namely above a partially perforated cover plate 170.
- the cover plate 170 is in the rear region (i.e.
- Suction device 120 formed perforated and formed transparent in a front region, so that a through the
- Extractor 100 enclosed working space 180 through a above the transparent part of the ceiling plate 170 arranged lighting device 190 can be illuminated.
- the suction device 120 is fluidically with a lower portion of the working space 180 by means of a through a
- the suction device 120 is further with a
- Exhaust air system 220 fluidly connected.
- 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.
- Engagement position is provided approximately at a height of 1350 mm.
- Figures 4 to 5 show schematic horizontal views of the preferred take-off 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.
- Figure 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
- Working space 180 can be controlled.
- the suction device 120 preferably comprises one
- Air inlet box 121 an exhaust pipe 122 and an exhaust port 123.
- three flap assemblies 124, 125, 126 are provided.
- the air inlet box 121 preferably has an in
- the flap assemblies 124, 125, 126 are preferably dimensioned such that the maximum flow rate through one of the flap assemblies 124, 125, 126 (i.e.
- Air inlet openings can be between 400 and 600 m per hour, preferably between 450 and 500 m3 per hour.
- the front flap assemblies 124, 125 are included
- controllable suction device 120 comprises a
- the measuring device 127 which is adapted 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 MSi, 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 arrangement 127 furthermore comprises a magnetic valve 128.
- 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 configured such that the flaps permit closing the door assemblies at approximately an angle of 70 0, such that no further sealing attacks more 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
- Ab povertyvolumenströmen can be made a halfway division on the front and rear flap assemblies; in night mode can be achieved by closing the front flap assemblies 124, 125 and only the rear flap assembly 126 regulated or
- the measuring device 127 can be switched in normal operation between the two measuring points MS2 and MS3 and thus monitored, which can be accurately measured and controlled by the measuring point MS3 very low exhaust air volume flows.
- 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).
- Figure 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 one
- the flap assemblies 124 ', 125', 126 ' are preferably dimensioned such that the maximum flow rate through one of the flap assemblies 124', 125 ', 126' (i.e.
- Air inlet openings can be between 400 and 600 m per hour, preferably between 450 and 500 m3 per hour.
- the front flap assemblies 124 ', 125' are included
- controllable suction device 120 also comprises a
- Measuring device 127 ' which is arranged 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 MSi', 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 measurement setup shown in FIG. 7 does not measure in front of and behind the flap arrangement 126 '(ie not the differential pressure of the flap arrangement 126') but only behind the flap arrangement 126 '.
- the test setup shown in FIG. 7 thus represents a simplified construction compared to the test setup shown in FIG. 6. Depending on the requirement for the spread of the air quantity, this simplified test setup can also 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.
- the flaps of the flap assemblies 124 ', 125', 126 ' are preferably configured such that the flaps at approximately an angle of 70 0 a closure shown in Figure 7 of the
- Flap assemblies 124 ', 125' connected to the upper portion of the
- Working space 180 are fluidically connected, controlled in parallel / driven. To avoid damage to the pressure sensors
- 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.
- Ab povertyvolumenströmen can be made a halfway division on the front and rear flap assemblies; In night mode, a very low exhaust air volume flow can be achieved by closing the front flap assemblies 124 ', 125' and only controlling the rear flap assembly 126 '.
- the measuring device 127 ' can be connected in the control mode between the two measuring points MS2' and MS3 'and thus monitored, which can be accurately measured and regulated by the measuring point MSß'geringe exhaust air flow rates.
- the characteristic DN 200 provides a control range of 100 to 550 m per hour for small draw-off devices, the characteristic DN 250 a control range of 200 to 850 m3 per hour for medium-sized
- Discharge devices and the characteristic curve DN 315 represent a control range of 300 to 1500 m3 per hour for large draw-off devices.
- the exhaust air volume flow can be calculated using the formula
- V V2 ⁇ C ⁇ Ap a be determined.
- V is the volume flow
- C the throttle factor
- ⁇ the detected pressure difference
- Measuring device 127 ' (see Figure 7) measured differential pressure.
- FIG. 9 shows a schematic overview of the control scheme with which the preferred embodiment of the draw-off device 100 according to the invention is regulated.
- the controller unit is preferably a programmable electronic control unit (for example a DDC element or another suitable controller element).
- Damper arrangements 124, 125, 126 or 124 ', 125', 126 ' are controlled or controlled in the preferred embodiment on the basis of the following operating parameters:
- Window sensors with the aid of window sensors, the position or the opening position of the window slider is determined, so that the "open" area of the window
- Window slider can be calculated or calculated; the positioning of the window slider can, for example, by means of
- Temperature difference between the environment and the working space 180 of the trigger 100 are determined, in which case the pollutant content of the air can be detected and the pollutant difference between the environment and the working space 180;
- DDC in the DDC unit (Direct Digital Control
- the setpoint values may also include the operating parameters for the night service or for the "minimum state", where input or control elements can be provided so that the operator actively switches the trigger device 100 into its respective operating states (for example, control mode, night mode, etc.)
- the control unit can output the current operating state by means of a display device, the extraction device 100 can via
- Working space 180 spend; through the measuring arrangement 127, 127 ', the pressure difference between the inlet box 121, 121' and the exhaust port 123, 123 'can be determined, and thus the current volume flow, or the current exhaust air volume flow, which is passed into the exhaust air system can be determined; through these sensors (for example
- Air inlet openings guided volume flows can be determined.
- the 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
- Figure 10 shows an example of the flap positions of
- Absaugincardi 120 applies, except for measured value detection in the rear flap assembly i26', the corresponding.
- Figure 11 shows schematically the air flow profile in one
- isothermal operation i.e., 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.
- a rotating, stable exhaust air roller forms in the working space 180, which provides an orderly and stable flow through the exhaust air
- the temperature in the working space 180 is higher than in the environment, so that the trigger device no longer is operated isothermally.
- the temperature difference is so high that a temperature stratification threatens.
- 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.
- Exhaust air flow increased between 30 and 50%. In addition, at least 90% of the exhaust air volume flow through the front
- Damper assemblies 124, 125 out 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 work space 180 as soon as possible (preferably within 10 to 20 seconds) flushed, i. 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 when the window slider 150 is closed
- 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 special
- this operating mode is particularly advantageous for night operation, in particular since heavy gases which would otherwise collect in the lower region of the working space 180 can also be sucked out by the relatively large air roll.
- the above explanations apply correspondingly to the suction device 120 '.
- FIG. 13 shows an exemplary controller parameterization of the
- the volume flows or the exhaust air volume flow can be regulated linearly with respect to the opening degree of the window slide.
- the exhaust air volume flow in addition to the above-described change in the proportionate volume flows of the flap arrangements) can be increased, the maximum
- the size is set as the preset critical value for temperature difference and about that represents 1.5 times 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)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015201026.0A DE102015201026B3 (en) | 2015-01-22 | 2015-01-22 | Discharge device with regulated suction device |
PCT/EP2016/050911 WO2016116408A1 (en) | 2015-01-22 | 2016-01-18 | Exhaust device with controlled suction device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3247496A1 true EP3247496A1 (en) | 2017-11-29 |
EP3247496B1 EP3247496B1 (en) | 2019-10-02 |
Family
ID=55174633
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16700890.3A Active EP3247496B1 (en) | 2015-01-22 | 2016-01-18 | Exhaust device with controlled suction device |
Country Status (4)
Country | Link |
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EP (1) | EP3247496B1 (en) |
DE (1) | DE102015201026B3 (en) |
DK (1) | DK3247496T3 (en) |
WO (1) | WO2016116408A1 (en) |
Cited By (1)
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CN114453375A (en) * | 2020-11-09 | 2022-05-10 | 实验室融合有限责任公司 | Air volume adjustable type fume hood equipment |
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CN106492890A (en) * | 2016-11-20 | 2017-03-15 | 合肥优亿科机电科技有限公司 | A kind of level Four horizontal cell toxin safety cabinet |
EP3919195B1 (en) * | 2020-06-03 | 2023-08-09 | InnoGUARD UtvecklingsGrupp AB | A fume cupboard and a method for controlling such fume cupboard |
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DE3510647A1 (en) * | 1985-03-23 | 1986-09-25 | Buderus Ag, 6330 Wetzlar | Air extraction device for an extractor cabinet (fume cupboard) |
DE4040723C2 (en) * | 1990-12-19 | 1996-01-25 | Waldner Laboreinrichtungen | Fume hood |
KR100336811B1 (en) * | 1992-10-23 | 2002-10-09 | 데이비드 더블유. 팔머 | System for controlling flow through a process region |
EP0622716B1 (en) * | 1993-04-30 | 2001-09-05 | American Auto-Matrix, Inc. | A method and system for maintaining a desired air flow through a fume hood |
DE4402541A1 (en) * | 1994-01-28 | 1995-08-03 | Waldner Laboreinrichtungen | Laboratory ventilation system |
DE19545948C2 (en) * | 1995-12-08 | 1997-09-18 | Waldner Laboreinrichtungen | Device for determining the strength of a gas volume flow |
US5716267A (en) * | 1995-12-28 | 1998-02-10 | Labconco Corporation | Fume hood with secondary exhaust collection device |
US5697838A (en) * | 1996-06-04 | 1997-12-16 | Flow Safe Inc. | Apparatus and method to optimize fume containment by a hood |
US5924920A (en) * | 1998-01-15 | 1999-07-20 | Flow Safe, Inc. | Fume hood having a bi-stable vortex |
US7470176B2 (en) * | 2005-10-14 | 2008-12-30 | Flow Safe Inc | Converting existing prior art fume hoods into high performance low airflow stable vortex fume hoods |
CN104259170B (en) * | 2006-06-23 | 2016-05-11 | 弗兰斯瓦斯·P·豪维列 | Without pipe vent cabinet system |
US9527119B2 (en) * | 2012-09-20 | 2016-12-27 | Siemens Industry, Inc. | System for detecting a position of a fume hood sash |
DE102014202271B3 (en) * | 2014-02-07 | 2015-03-05 | Konrad Kreuzer | Modular extraction device |
-
2015
- 2015-01-22 DE DE102015201026.0A patent/DE102015201026B3/en active Active
-
2016
- 2016-01-18 EP EP16700890.3A patent/EP3247496B1/en active Active
- 2016-01-18 WO PCT/EP2016/050911 patent/WO2016116408A1/en active Application Filing
- 2016-01-18 DK DK16700890T patent/DK3247496T3/en active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114453375A (en) * | 2020-11-09 | 2022-05-10 | 实验室融合有限责任公司 | Air volume adjustable type fume hood equipment |
Also Published As
Publication number | Publication date |
---|---|
DK3247496T3 (en) | 2019-12-09 |
EP3247496B1 (en) | 2019-10-02 |
DE102015201026B3 (en) | 2016-06-16 |
WO2016116408A1 (en) | 2016-07-28 |
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