EP0844030A2 - Extraction workbench and its method of operation - Google Patents

Abstract

The workbench comprises a working chamber (2) accessible from outside via at least one access opening (4), a vent for extracting air contaminated with harmful matter from the chamber and a controller (10) for at least one mode of the workbench. The access opening can be closed and the controller contains test devices by means of which the authority of a person to access the chamber is validated. Opening of the closed access opening can be triggered depending on access authority validation.

Description

The invention relates to a fume cupboard according to the preamble of claim 1. Furthermore, the invention is concerned with an operating method of such a fume cupboard.

Various workbenches are known, at least one essentially closed cabin with suction devices have so that within the cabin to be handled or toxic substances that occur do not get outside the cabin can.

In this context, reference is made in particular to the published German patent application DE 195 17 106 A1 entitled "Security system for with dangerous substances contaminated air for a lounge and / or work space für Menschen "and the resulting German patent DE 195 17 106 C2 entitled "" Security system for those with dangerous Substances contaminated air for a work room a deduction workbench ", which is separated from the aforementioned application German patent application DE 195 49 396 A1 with the title "Safety cabinet" and the German patent application DE 196 19 495 A1 entitled "Security system with suction devices". By this reference is the content and disclosure content of these documents and the documents specified therein Publications also fully included the present description.

DE 195 17 106 A1 and DE 195 17 106 C2 is a security system for contaminated with dangerous substances Air known for a work area of a fume cupboard. A such fume cupboard or safety workbench can be controlled be provided, the one or more different Can take on tasks.

This state of the art can be used to increase reliability and ease of use of the electronic system Control devices can be provided, at least for controlling an optional, adjustable and / or controllable Operating parameters or at least one such component of the Security system are designed. For example, a common one Computer with appropriate connection and software equipment be used for the tax tasks. Especially for the control of the or data output for the production of products, such as in the manufacture of cytostatics, use existing programs in a rational manner be on a conventional computer can expire at a corresponding security workplace can be used in many ways: The computer could then also perform other tasks, such as Operation of various monitoring devices, e.g. Monitoring sensors, possibly coupled with the detection of Dangerous situations and the corresponding triggering of alarm devices as well as display and protocol devices. Basically, all settings, monitoring and also work in the work area through a uniform control be regulated or supported on simple and fast Process and evaluate all relevant data can.

However, such a known and advantageous control can improper operation and handling of hazardous substances in the work area of the fume cupboard or safety cabinet due to inadequate not adequately prevent qualified personnel. Furthermore, the safety that can be achieved with such controls not yet ideal for operating personnel.

The aim of the present invention is therefore one from the Fume cupboard known in the prior art for safety reasons to improve.

This goal is achieved with a fume cupboard according to claim 1 and an operating method of a fume cupboard according to claim 9 reached.

The invention thus becomes a fume cupboard in terms of device with a work space through at least one engagement opening is accessible from the outside, ventilation for suction of air contaminated with hazardous substances from the work area and a controller for at least one operation of the Fume cupboard created, it is further provided that the engagement opening is closable, and that the control Contains test facilities through which an access authorization a person to the work space and opening the closed engagement opening depending on a determined access authorization can be triggered.

A possible implementation of the invention can, for example consist of a disk reader and processor devices to provide access authorization to the work space and / or for the operation or maintenance of the safety cabinet to regulate. For example only and not for limitation or finally credit card-sized Chip or magnetic stripe cards as suitable Called disk. This can be used, for example person-specific restrictions, such as Pregnancy, account for access authorization as well as others professional association regulations.

In any case, by checking the access authorization according to the invention before granting access to the interior of a Fume cupboard ensure that none are professional and / or people unsuitable for health with the hazardous substances inside the work area of the fume cupboard come. On the one hand, this reliably turns into a hazard such technically and / or unsuitable for health People excluded. On the other hand, it can certainly no incorrect operation of the safety or fume cupboard technically unsuitable people occur, so the workbench themselves, but also the surroundings cannot be damaged.

Expressed in general terms, the invention enables professional associations Compliance with regulations as well as personal ones individual restrictions are taken into account.

According to a preferred development of the invention, the Test facilities also designed depending on at least one of a determined access authorization a variety of operating modes of the fume cupboard. Preferred modes of operation are at least one work mode, a service company and / or a cleaning company. Here it is advantageous if depending on the operating mode in particular an opening degree of the engagement opening can be set is. Additionally or alternatively, the latter can Variant can be provided that a decontamination of the work area can be carried out semi-automatically or fully automatically is what, for example, flushing the work area with Shielding gas can be provided, in particular a neutralization or destruction of the workbench in the fume cupboard contained hazardous substances.

• Aufnahmeeinrichtungen für Datenträger, vorzugsweise stift- oder kartenförmige Datenträger, zum optischen, elektrischen und/oder magnetischen Erfassen von Personendaten von den Datenträgern,
• manuell betätigbare Eingabemittel, wie insbesondere Tasten oder Knöpfe, zum manuellen Eingeben von Personendaten, insbesondere PINs,
• Empfangseinrichtungen für von berührungslos übermittelnden Datenträgern, insbesondere Transpondern, stammende Personendaten, und/oder
• Erfassungseinrichtungen für individuelle Körpermerkmale, wie z.B. Finger- oder Handabdrücke, Pupillengestalt u.a. als Personendaten von Bedienpersonen.

Furthermore, it can preferably be provided that the test devices contain input devices via which personal and / or personal identification data can be recorded. Such input devices preferably contain:

• Recording devices for data carriers, preferably pen or card-shaped data carriers, for optical, electrical and / or magnetic recording of personal data from the data carriers,
• manually operable input means, such as in particular buttons or buttons, for manually entering personal data, in particular PINs,
• Receiving devices for personal data originating from contactlessly transmitting data carriers, in particular transponders, and / or
• Detection devices for individual body features, such as fingerprints or handprints, pupil shape, etc., as personal data of operators.

To further improve the fume cupboard according to the invention can display devices for operator guidance and / or operator information before, during and / or after the operation of the Fume cupboard outside and / or inside the work area be included. The display devices are preferably further for entering data, including personal and / or Access authorization data, such as in the form of integrated in keys, including membrane keys Lighting devices or touch-sensitive screens.

The fume cupboard according to the invention can also advantageously be devices for capturing work inside the work area included, which are designed to remove one Detection of work inside the work space for one predeterminable time, especially depending on one released operating mode, a closing of the engagement opening trigger and preferably the current access authorization to end. This can ensure that after Completion of work within the fume cupboard, its opening does not remain open accidentally.

According to another development of the invention can be provided be that closable containers inside the work area, Cupboards and / or reservoirs depending on a determined access authorization are accessible. This enables, for example, access to preparation cabinets inside the fume cupboard from its work area only to be made possible by specially authorized persons.

It is also advantageous if that inside the work space Devices for detecting a position of an object, like a hand, are arranged to depend on trigger an automatic of a position of an object, in particular waste disposal facilities accessible from the inside of the fume cupboard and / or garbage storage and / or disposal facilities and / or specimen and device storage rooms to operate automatically, preferably automatically open and after a definable time without passage of Close material again. These design options create additional security because there are no manual operations and thus touching e.g. contaminated surfaces or handles.

It is also advantageous to use a fume cupboard according to the present invention to provide monitoring devices at least for detecting at least one operating state a component of the fume cupboard and / or at least information regarding the dangerous substances in the Fume cupboard are designed. This configuration can be Advantageously develop in that Alarm devices are provided by the deviations from Normal operation of the fume cupboard depending on the detection results of the monitoring devices acoustically and / or can be displayed optically. This will ensure security for Operating personnel increased.

The control devices are preferably in particular electronic Control devices. This enables a comprehensive, effective, small and cheap control of the fume cupboard can be achieved.

In a further development of the invention it can also be provided that the control devices for controlling at least one optional one, adjustable and / or controllable operating parameters or at least one such component of the fume cupboard are designed. It is particularly preferred if the control devices for controlling at least one operating parameter or at least one component of the fume cupboard depending of detection results of the monitoring devices are designed.

In a fume cupboard according to the invention, the method of operation the monitoring devices and / or the control devices via a control panel, in particular via a key control panel, be manually adjustable, preferably the Operation of the monitoring devices and / or the control devices and / or the control panel settings can be displayed by means of display devices.

Furthermore, protocol devices can advantageously be provided are, through the operating data of the fume cupboard, including the data of access granted and / or detection results, if applicable the monitoring devices can be logged are. This automatically and reliably becomes a business log created, based on the proper operation and malfunctions can be demonstrated.

In a further embodiment of the fume cupboard, data reading and / or data input devices can be provided, by means of which operating parameters and / or operating or application control parameters can be entered.

Furthermore, it is possible to create a device for the Air curtain engaging opening and / or Devices for the automatic closing of filter devices to be provided when removing them from the fume cupboard.

The ventilation for suction of contaminated with hazardous substances Air from the work space can preferably be designed or be controlled so that even when the opening is closed runs, preferably with lower power and particularly preferably with an output of about 20% based on the output when the opening is open. This ensures that during such a so-called standby or Standby operation no deposition of hazardous substances the surfaces inside the work area of the fume cupboard or Safety cabinet can occur, so that there are hazardous substances cannot accumulate excessively on these surfaces.

After a user logs in and is granted approval ventilation by the control, e.g. program controlled, be ramped up to work performance. In addition a preferably glare-free lighting can automatically switch on by the control. Before the opening then opened to the actual access to the inside the work area of the fume cupboard can then another self-test can be carried out to ensure that the determine normal operating condition. Is once on the ground any fault is not normal, it remains Disc closed. The operator can use display devices about the disruption and possibly even behavioral measures be informed in this case. In addition, with a Fault an alarm is triggered. After completing the The intervention opening, which e.g. divided by two moving apart or unfolding relative to each other Disks or through a relative to the rest of the workbench opening or opening window can be formed, close what is automatic, time-controlled if necessary depending from capturing work within the work space or triggered manually, possibly with a time delay close again. The ventilation is preferably running for safety reasons a definable time at full power, until it is reduced by the control.

In terms of method, the invention becomes an operating method for a fume cupboard with a work space that is at least a lockable access opening accessible from the outside is, a ventilation system for extracting hazardous substances contaminated air from the work area and a control created for at least one operation of the fume cupboard. An access authorization is provided by means of test facilities a person finds out about the work space and then becomes dependent from a determined access authorization the locked Access opening to the interior of the work space for the operator opened.

Analogous to the device configurations, the operating method can be provided by the test equipment at least determined access authorization one of a plurality of operating modes of the fume cupboard, like in particular a working company, a service company and / or a cleaning company can be released. Here it is self-evident within the scope of the invention that if no suitable access authorization is found, also no access to the interior of the workbench of the fume cupboard is granted, i.e. the engagement opening closed remains. To meet the different needs Being able to meet different operating modes can advantageously be provided that the engagement opening variably opened and / or decontamination of the work area is carried out semi-automatically or fully automatically.

The access authorization is preferred by entering personal and / or personal identification data by means of input devices received in the test facilities.

There is a further development of the method according to the invention in that work inside the work space is recorded and especially after the cessation of work in the Interior of the work space for a predetermined time, preferably possibly depending on an enabled operating mode, closing the engagement opening triggered and preferred the current access authorization is ended. Thereby cannot inadvertently leave the workbench open come, so that no unauthorized persons accidentally Access to the interior of the work area of the suction or safety workbench can get.

It can also be provided that inside the work space closable containers, cupboards and / or reservoirs depending on a determined access authorization released for opening. This allows authorized, i.e. usually professionally qualified personnel at the same time as access inside the work space Access to drug cabinets, etc. are granted.

Working with and on a suction or fume cupboard according to the invention can be further increased by the fact that inside of the work space depending on the position of an object triggered an automatic, especially from the inside Waste disposal facilities accessible to the fume cupboard and / or garbage storage and / or disposal facilities and / or preparation and device storage rooms automatically to be actuated, preferably opened automatically and after one predefinable time closed without passage of material will. Touches of possibly dangerous to health Materials contaminated surfaces and / or objects can can be avoided.

It is also advantageous if by means of monitoring devices at least one operating state of at least one component the fume cupboard and / or at least one piece of information detected in the fume cupboard regarding the dangerous substances and that in particular deviations from normal operation depending on the detection results of the monitoring devices acoustically by means of alarm devices and / or be displayed optically.

An advantageous development of the operating method for a Deduction workbench also consists in the fact that by means of the control devices, especially electronic control devices, at least one optional, adjustable and / or controllable Operating parameters or at least one such component the fume cupboard is controlled, and preferably at least if necessary an operating parameter or at least one component the fume cupboard depending on the detection results the monitoring devices is controlled.

The monitoring devices can preferably operate and / or the control devices via a control panel, in particular can be set manually via a button control panel, preferably the mode of operation of the monitoring devices and / or the control devices and / or the settings the control panel is displayed by means of display devices can be.

It is particularly advantageous if the operating data of the fume cupboard, including the data of access granted, and / or possibly detection results of the monitoring devices be logged.

There is an advantageous simplification of the operating method in that operating parameters and / or operating or application control parameters by means of data readers and / or data input devices can be entered.

To further increase security can also be provided be that an air curtain that closes off the engagement opening is generated and / or filter devices when they are removed are automatically locked from the fume cupboard.

Another particularly preferred method variant exists in that the ventilation for suction of hazardous substances Contaminated air from the work area even when closed Operation opening is operated, preferably with less Performance and particularly preferably with a performance of about 20% based on the performance when the opening is open.

With the invention several are individually or in any Combinations created possibilities that can be realized to increase the safety of such fume cupboards or safety cabinets and operate them.

Below are some particularly interesting advantages indicated and explained in detail by these improvements.

Safety or suction workbenches according to the invention can, for example for the production of ready-to-use cytostatics preparations used and especially in hospital pharmacies be used. In particular, such Safety cabinets meet the requirements of type H according to DIN 12980 and DIN 12950 part 10. When preparing ready to use Cytostatics preparations for use (type V1) however, it is only an embodiment. General can fulfill safety cabinets according to the invention of personal, product, carry-over and environmental protection be used when dealing with toxic substances is.

Other possible areas of application for such fume cupboards are, for example, dental laboratories in which diverse working materials are used, which are harmful to health Emit vapors. E.g. are in this context Methyl methacrylate and methyl methacrylate (MMA) in particular striking. The latter substance in particular is after the EC safety sheet (according to 91/155 / EEC) acute oral, dermal and inhalation toxic and there are irritant effects on skin and Eyes. Other substances have similar hazard potentials on.

Within the scope of the invention, for example, can also be provided be that there is a permanent negative pressure in the work area ensures that the environment does not leak even can be contaminated. There is preferably low turbulence Displacement Flow (LAF), which makes the product and Protection against carry-over is ensured. In further training The invention is a particular one at the work opening high air inlet speed. By such a heightened Edge suction, the speed and / or volume of the Personal and product protection is guaranteed. The separation capacity preferably reaches that used Filters or the effect of neutralizers the required values according to EU14. It is further preferred that these values in particular were significantly exceeded will.

Regarding the filter, it can be another advantageous one Improvement within the scope of the invention such filter cassettes are used, which close automatically when pulled out, whereby the effort for filter change according to earlier known systems in which a seal of the entire Room in which the safety cabinet is located an accident risk can never be completely ruled out is significantly reduced.

The automatic closing of filter cartridges or cartridges can be achieved according to the invention, for example that the filter cartridges or cartridges have their own locking mechanisms included before filter removal for a tight encapsulation or similar of the filter used. Possibly. can additionally in a safety cabinet according to the invention a sluice can be included, which is the removal of a filter unit guaranteed without contamination of the environment, etc.

Another possibility, an inevitable and therefore safe To include filter content within the scope of the invention to ensure can be realized in that the removal opening for filter units through packaging material, such as suitable Plastic films, hoses or bags sealed so that e.g. Filter cartridges through the removal opening exclusively in such plastic films, tubes or -sacks are inserted and packed automatically. Possibly. For example, welding devices can be provided which also automatically welds the filter units in the packaging material so that the Filter units are packed securely and tightly. Instead of being more flexible Foil-based containers can also be larger Dimensions rigid containers, such as boxes or barrels, can be used. Here, too, it is possible to put the lid on automatically, before a release of the withdrawal or a withdrawal in general is possible. As with the film material, the lids can also be used e.g. automatically welded to the containers used before the removal can take place. One more way for closing film-based or more dimensionally stable Containers are sealing, for example to ensure by gluing. This is particularly so then preferable if welding is due to the system or material is not possible or only with great effort. Hot gluing should be mentioned here as one possibility.

Using a data carrier reader and processor devices can follow another improvement of the safety cabinet the invention can be realized. In doing so, a data medium which is formed according to the above point of view may be operational data and / or requirements for that Safety workbench entered to work on certain and / or Reliable adjustment of toxins adapted operating parameters and ensure. For example, a process control of a partially or fully automatically within the cabin or the work area of the safety workbench cease running activity. But also suction performance, Airflow controls, temperature controls, Lighting controls, certain releases within the Workspace of accessible material magazines and much more can be thus reliably ensure error-free for certain applications. Another application is in maintenance activities, where e.g. semi or fully automatic processes for example for Filter change especially in connection with self-closing Filter containers started and operated programmatically will.

Another program-controlled process step during operation the safety cabinet according to the invention relates to this Start extraction and release of access to the work area. This can depend on a particular one Identification information takes place, which is supplied by data carrier becomes. So after determining a certain authorization or authorization level e.g. for certain jobs, first the suction started or on operating performance started up and operated for a specified period of time be allowed before intervening in the work area becomes. The latter is still displayed, for example and allows the viewing window covering the work space to the staff closes automatically so far, e.g. panned or moved, is that an intervention in which and therefore work in the work space is possible. Instead of Another automatic can be used to lift the lens Release of intervention openings take place in order to the operational readiness display.

Another possible improvement concerns the lens itself. On the one hand the lens can be bent and e.g. quarter-circular side elements to be completed so that optimal viewing conditions from above and from the side. This enables ergonomic work. The work space can be done from a favorable perspective also look from above and there is a particularly large one Disk area in front, which continues to have good lighting conditions and especially enable daylight conditions. In addition can work lights be placed inside the work area Upper part of the safety workbench can be provided, the one glare-free illumination of the work area is guaranteed. The Glare-free is also due to the curved lens surface supported.

By designing the lens as a double lens a further advantageous improvement can also be achieved. It is provided that between the two part disks air flow generated by appropriate facilities that emerges at the lower edge of the pane and as it were forming an air curtain. This means that even with a Design in which the visor to enable intervention is raised in the work area, so that between the Lower edge of the lens and the top of the work surface of the working area a slot-shaped engagement opening arises, a good sealing of the work area from the outside Environment can be guaranteed. The air flow is preferred stronger between the dividing discs (volume and / or speed), than inside the work space. Furthermore, it is particular possible, below the lower edge of such Viewing window a separate suction with higher performance to provide the shield between the work area and the environment to further improve the safety cabinet. Alternatively or in addition, it is also possible to switch between the Partial disks flowing and possibly sucked away from their lower edge Air neutralizers must be added to ensure safety further increase. The air curtain according to the invention at the inlet opening can also be used in other designs the latter can be realized without going beyond the scope of this To have to go beyond revelation.

Also with the problem of waste disposal from inside the work area resulting waste, the invention proposes Improvement before. This is that automatic devices, e.g. can contain a light barrier are who regulate access to a garbage disposal. So that is ensures that the operators have no handling inside the possibly contaminated work area must touch. From This is of particular importance if e.g. the work gloves, most of the times even two above one another when working within of the work space to be worn after completion of the Work must be disposed of. With appropriate precautions can be ensured within the work space that in the field of garbage disposal regularly or controlled one sufficiently low or negligible contamination of the There is air, at least after a certain time. Thereby can now work gloves, e.g. rubber gloves undressed and in the automatically opening and again closing garbage can be thrown. The point of view the invention in terms of access control for, for example for the first time, a waste chute allows that work gloves are not removed outside the work area Need to become.

All of the above versions can be done with security systems or workbenches according to one or more of the earlier Applications DE 195 17 106 A1, DE 195 49 396 A1 and DE 196 19 495 A1 and that resulting from the first-mentioned application realize German patent DE 195 17 106, wherein it is again pointed out that the disclosure levels and contents of these older applications by the present one Reference fully incorporated in this description are. This also applies to those specified in the applications mentioned further state of the art.

In DE 195 17 106 A1 there are also application examples for called a controller.

At least for detecting at least one operating state a component of the security system and / or at least information about the dangerous substances in parts of the security system or the entire security system monitoring devices can be provided. To dangerous Pass on situations and conditions to the personnel, can the monitoring devices with alarm devices be coupled by the deviations from normal operation in Dependence on detection results of the monitoring devices can be indicated acoustically and / or optically.

The monitoring devices can, for example, sensors for a safety window safety lock. In the case of vertically displaceable viewing panes, e.g. an alarm is triggered as soon as the target position in the sense of a Enlargement of a work opening is left. For folding windows can trigger an alarm as soon as the window lock is solved.

Sensors may also be included to justify an exhaust air alarm be. By gradually throttling the suction volume flow e.g. by partially covering the working or insertion opening including preferably suction slots at the front a volume flow can be set at which just doesn't respond to an exhaust air alarm. In this condition should be the exhaust air volume flow to be measured in the exhaust air opening not be less than to reach e.g. an average Air speed of 0.4 m / s based on the type-related Cross section of the work opening is required.

An ambient air alarm can be issued if a medium one Speed of displacement air, measured over the entire working area e.g. at a height of 5 cm above the lower edge a window of a safety cabinet, for example found below 0.32 m / s or above 0.48 m / s becomes.

Possibly. network interruption monitoring can also be provided be, the acquisition then via, for example, workbench-independent Devices must be done.

The monitoring devices can be in different places system of particle counters and air speedometers contain. Those obtained using such sensors System operating information can be used for manual or automatic control of the system. Certain particle limits exceeded and changes of air velocities in different places in the System can control the temperature of the incinerator and / or the performance of the ventilation devices be used.

Basically, however, all company sizes, states and - Processes monitored with suitable sensors or detectors to avoid danger.

For certain applications of the invention, it is particularly advantageous if the operation of the fume cupboard e.g. in printer logs and / or writer records and / or stored Files is documented. This is done through protocol facilities realized by the detection results of the Monitoring devices and / or operating data of the whole or partial security system can be logged. In order to is particularly the demand for uninterrupted operation the workbench to avoid environmental contamination, Accounted for, since even after some time over which the Workbench or the work space in general not used and therefore was not observed, can be easily determined when and what irregularities or malfunctions occurred. A corresponding protocol also enables a complete documentation of the operation of the security system for example in his company log.

To the reliability and ease of use of the fume cupboard to increase has a configuration in particular electronic control devices to control at least an optional, adjustable and / or controllable operating parameter or at least one such component of the Security system are designed. For example, a common one Computer with appropriate connection and software equipment be used for the tax tasks. Especially for the control of the or data output for the production of products, such as in the manufacture of cytostatics, use existing programs in a rational manner be on a conventional computer can expire at a corresponding security workplace can be used in many ways: The computer could then also perform other tasks, such as Operation of various monitoring sensors, from display and Protocol facilities and the detection of dangerous situations and the corresponding triggering of alarm devices. Basically, all settings, monitoring and also work in the work area through a uniform control be regulated or supported on simple and fast Process and evaluate all relevant data can.

Another embodiment of the invention is that for example, access authorization to the inside of the work area the fume cupboard is only received if two sufficiently authorized by means of the test facilities People were found. This ensures that not an individual working on the workbench alone, so that in the event of a malfunction, through which those with their hands in Person working inside the work area of the fume cupboard is unable to act or react, this does not go unnoticed remains and greater damage to that person, the fume cupboard and the environment appropriately qualified by the second Person can be avoided.

The work area can be used to facilitate cleaning work the fume cupboard towards the operator Viewing window can be completely folded up or raised.

Cleaning, working and service is provided by the invention Access control only specifically authorized for this People possible. The security system can do various things Differentiate user groups and preferably also the corresponding operating modes, especially the work sessions, log, in addition to the operator, system parameters, Working hours, etc. are recorded. Those are preferred Data at a standard interface, e.g. for a computer connection, read out. The system parameters can also also displayed in plain text on a dialog / monitoring monitor will. This allows operators to be constantly on the Be informed of system values. additional optical and acoustic Alarm signals further increase work safety.

The invention can be used in workbenches with exhaust air mode or recirculation mode and all types of filters and neutralizers be applied.

From the claims, including the dependent claims, and their combinations result in further preferred and advantageous embodiment of the invention.

Fig. 1 eine schematische Querschnittsansicht eines ersten Ausführungsbeispiels einer Abzugswerkbank zeigt,

Fig. 2 eine perspektivische Ansicht eines zweiten Ausführungsbeispiels einer Abzugswerkbank ist,

Fig. 3, 4 und 5 Flußdiagramme von Teilen eines Ausführungsbeispiels eines Betriebsverfahrens für eine Abzugswerkbank illustrieren, und

Fig. 6 bis 20 entsprechend Beispiele für Anzeigen 1, 2, 3A/I, 3B/I, 4/I, 2/II, 3/II, 2/III, 3/III, 3/III1 ○1, 3/III1 ○2a, 3/III1 ○2b, 3/III1 ○3, 3/III2 ○ und 3/III5 ○ aus den Flußdiagrammen der Fig. 3 bis 5 sind.

The invention is explained in more detail below on the basis of specific configurations with reference to the drawing, in which:

1 shows a schematic cross-sectional view of a first embodiment of a fume cupboard,

2 is a perspective view of a second embodiment of a fume cupboard,

3, 4 and 5 illustrate flow diagrams of parts of an embodiment of an operating method for a fume cupboard, and

6 to 20 corresponding to examples of displays 1, 2, 3A / I, 3B / I, 4 / I, 2 / II, 3 / II, 2 / III, 3 / III, 3 / III1 ○ 1, 3 / III1 ○ 2a, 3 / III1 ○ 2b, 3 / III1 ○ 3, 3 / III2 ○ and 3 / III5 ○ from the flowcharts of FIGS. 3 to 5.

The extraction or suction workbench shown in section in FIG. 1 1 contains a work space 2, from which air by means of a Ventilation 3 is suctioned off. To get inside the work room 2 arrive, an engagement opening 4 is provided which between a lens 5 by its method in a raised Position opposite a work surface 6 of the work space 2 and this work surface 6 is formed. The intervention opening 4 is normally closed.

The suction workbench 1 also has testing devices 7, such as a magnetic card reader 8 shown, in the by an operator your personal magnetic card or magnetic stripe card 9 must be inserted before access to the work area 2 can get. The data recorded by the test devices 7 from the magnetic card 9 lead to their maintenance by their verification the lock of the lens 5 in its closed Position so that no engagement opening 4 is formed or a release for a specific operating mode or several specific operating modes of the fume cupboard 1 and for a controlled opening of the engagement opening 4 by appropriate adjustment of the lens 5. Maintenance the lock of the lens 5 or the opening the engagement opening 4 is realized via a control 10, depending on the test result of the test facilities 7 responds. The test devices 7 can be in the controller 10 integrated or external to the latter and coupled with it be.

In addition, it can be provided that to avoid misuse a found or stolen magnetic card 9 one For example, PIN (personal identification number) a keyboard 11 must be entered, the execution in 2 is shown. Otherwise, the design the embodiment shown in Fig. 2 identical to that of 1, with the exception that two lens parts 5a and 5b are provided, possibly only the upper one Lens part 5b is moved upward to the engagement opening 4 to open. However, it can also be a type can be realized in which only the lens part 5a moves down or the two lens parts 5a and 5b move away from each other to close the engagement opening 4 produce. have two adjustable disc parts 5a and 5b the advantage that the engagement opening by accordingly controlled movement of the two parts adjusted in height and thus be adapted to the size of an operator can. The engagement opening 4 is closed in each of the specified cases reverse to the opening process.

Only after a positive test result regarding the Authorization of the person working on the suction or fume cupboard 1 want to work, has been received, becomes normal operation the trigger workbench 1 manufactured in a controlled manner. That is, the ventilation 3, which may include one or more fans from which Control 10 is ramped up to full power. Farther is used by the controller 10 for safe work in the work area 2 the fume cupboard or safety workbench 1 lighting 12 switched on. Only when all operating conditions and parameters have reached their normal operating values the controller 10 the engagement opening 4th

In terms of operations, the operation is as follows:

Since the fume cupboard or safety workbench 1 with an access control equipped, the user first by a magnetic stripe card 9 with the personal Identify PIN or personal identification number. If the user fulfills the access requirements, the system is activated. Ie: The fan or in general the Ventilation 3 is ramped up to its full capacity The light is switched on and opens after a warm-up period disc 5 automatically. Now the technician start working.

The polluted air is emitted by a radial fan vacuumed the work area 2. It becomes a special catalyst 13 supplied, the the gaseous impurities of the Air burns catalytically with an efficiency of 97%.

Workbench 1 is suitable for working with dangerous ones Fabrics also for storing such fabrics, since the Disk 5 can be completely closed. The ventilation 3 is running in warehouse operation at a lower power level. Both in Working as well as in warehouse operation, work space 2 is complete vacuum-washed, which ensures that the none Air can get inside out.

With the use of such fume cupboards 1, the safety regulations (e.g. EC safety data sheet, number 7, Instructions for safe handling, according to which handling MMA only in well-ventilated rooms).

In addition to the ventilation 3, the control 10 also turns on the lighting 12 controls so that no unnecessary energy is wasted becomes. The fume cupboard 1 also contains suitable ones Facilities for checking and documenting which people about how to deal with the respective health-endangering people Substances are authorized and who worked with these substances Has.

In dental technology, as well as other laboratories, for example many plastics in use that emit vapors. These vapors are unpleasant to smell and mostly harmful to health. The fume cupboard or suction workbench is preferred 1 a closed work space with a vacuum 2, in which substances harmful to health can be processed. Vapors cannot escape as there is always air through the Work or intervention opening 4 sucked and the polluted Air e.g. is converted into a catalyst 13. This will provide technicians and other operators Diseases protected and the relevant safety regulations are adhered to. Basically this is one Fume cupboard also for storing the treated or processed fabrics very suitable. Light-curing plastics e.g. can also be cured here if a UV lamp is integrated.

The fume cupboard is not, however, specified on the Areas of application limited, but can be used anywhere there Advantage to be used where hazardous substances are handled, must be worked or processed.

In the following, some preferred configurations of the Fume cupboard according to the invention described, details therefrom shown and explained analogously in FIGS. 3 to 20 are.

The electronics or software of the control is preferred Fail-safe at first, i.e. that in the event of a complete failure of the Electronics and / or software continue to improve user safety is guaranteed. In the event of a software failure, for example one that cannot be acknowledged and one that can be acknowledged acoustic alarm can be triggered. In case of a Ventilation malfunction (e.g. power failure, fan failure, etc.) can be a non-acknowledgeable optical and an acknowledgeable acoustic alarm can be triggered.

For access control, the control contains, preferably in Form an electronics, a reader, so that the fume cupboard only by authorized persons with access authorization can be used. This is an access (also accidentally) to contaminated areas or parts excluded. The access control preferably differentiates at least between Users, cleaning personnel, service personnel and system administrators, the latter, for example, instead of the Test equipment for access control or other workbench integrated Input devices via a particularly standard PC interface to the controller, the documentation etc. can access. The fan system should be in standby mode run especially at reduced power, so a constant air circulation and flow through filters guaranteed is. This fact ensures a very short one Preparation time before starting work on a suction or Safety workbench according to the invention.

The access authorization can be the name, possibly personnel number and the social security number, as well as the eligibility group of the owner included, so that a flawless Assignment to a person is possible. This can also personal protection needs (such as pregnancy) are taken into account will.

After reading the personal data and checking the access authorization can use the corresponding functions of the fume cupboard for example, released or suppressed as follows will:

1. Hochfahren des Lüftersystems auf LAF-Leistung (LAF: engl. "laminar air flow", turbulenzarme Verdrängungsströmung)

2. Einschalten der Beleuchtung

3. Nach erfolgreich abgeschlossener Selbstüberprüfung oder Selbst-Check des Systems, was später genauer beschrieben wird, erfolgt das Öffnen der Eingriffsöffnung bis zur vollständigen Arbeitsöffnung

4. Nach der Auslösung des Signals "Arbeitsende" (z.B. über eine STOP-Taste im Arbeitsraum oder an der Abzugswerkbank) erfolgt das Schließen der Eingriffsöffnung, Ausschalten der Beleuchtung, Herunterfahren des Lüftersystems in Standby-Leistung

5. Das vollständige Öffnen der Scheibe, wie z.B. durch Hochklappen des gesamten Oberteils, darf nicht möglich sein

6. Das Öffnen von Serviceklappen darf nicht möglich sein

7. Selbst-Check-, Betriebs- und Benutzerdaten werden gespeichert

Access authorization use:

1. Starting up the fan system to LAF performance (LAF: laminar air flow, low-turbulence displacement flow)

2. Switch on the lighting

3. After successfully completing the self-check or self-check of the system, which will be described in more detail later, the intervention opening is opened until the work opening is complete

4. After triggering the "end of work" signal (eg via a STOP button in the work area or on the fume cupboard), the intervention opening is closed, the lighting is switched off and the fan system is shut down in standby mode

5. It must not be possible to open the pane completely, for example by folding up the entire upper part

6. It must not be possible to open service hatches

7. Self-check, operating and user data are saved

1. Das gesamte Oberteil beispielsweise in Form der Sichtscheibe (vergleiche Fig. 1 und 2) kann hochgeklappt oder hochgefahren werden

2. Der Eingriffsöffnungsverschluß kann manuell betrieben werden

Access authorization cleaning:

1. The entire upper part, for example in the form of the viewing window (see FIGS. 1 and 2), can be folded up or raised

2. The access opening closure can be operated manually

1. alle Funktionen

2. Auswahlmenü

3. Auslesen der gespeicherten Daten über PC

Access authorization service:

1. all functions

2. Selection menu

3. Reading out the stored data via PC

1. Tastenfeld wird mit Funktionen zur Dateneingabe wie z.B. Mitarbeiterdaten belegt.

2. Sonst keine Funktionen

Access authorization system support (e.g. via a PC interface):

1. Keypad is assigned functions for data entry such as employee data.

2. No other functions

1. Zeitraum seit der letzten Wartung, Betriebsstunden seit der letzten Wartung, Gesamtbetriebsstunden seit Erstinbetriebnahme

2. Datum, Uhrzeit und Dauer der Benutzung inkl. Personenidentifikation (Zeit)

3. LAF während der Benutzung in Ordnung oder nicht in Ordnung (Strömungsgeschwindigkeit)

4. Filterzustand (zumindest während der Benutzung), beispielsweise über Differenzdruckmessung (Druck)

5. Ergebnis des Selbst-Checks

6. Jede Alarm-/Störungsmeldung mit Datum und Uhrzeit

7. Funktion der Beleuchtung

For example, the following data can be recorded during operation and saved for a period of at least one year, whereby a printout of the report can also be provided in addition or as an alternative (the information in brackets for all of the following lists are the respective measured variables):

1. Period since the last maintenance, operating hours since the last maintenance, total operating hours since the first start-up

2. Date, time and duration of use including personal identification (time)

3. LAF ok or not ok during use (flow rate)

4. Filter condition (at least during use), for example via differential pressure measurement (pressure)

5. Result of the self-check

6. Every alarm / fault message with date and time

7. Function of the lighting

1. Mitarbeiterdaten mit Art der Zugangsberechtigung

2. Änderungen

3. Löschungen

The following additional data can be recorded by the system support or the system administrator, for example:

1. Employee data with type of access authorization

2. Changes

3. Deletions

With the appropriate authorization, the data can be accessed via a suitable Interface e.g. can be read out by PC. Data, that are older than a year are automatically updated with new data overwritten, possibly before or on Request a printout or a backup copy as a protocol or operating book can be created. Reading the data can, for example, every six months as part of a maintenance be performed.

1. LAF in Ordnung oder nicht in Ordnung

2. Filterzustand (Differenzdruck)

3. Temperaturen (Innen/Außen)

The most important operating data can be shown on a fume cupboard or suction workbench via a display or generally via display devices. Examples for this are:

1. LAF ok or not ok

2. Filter condition (differential pressure)

3. Temperatures (indoor / outdoor)

In addition, the type of Fault or alarm is shown in plain text on the display will.

The performance of the fan system should preferably be regulated that a low-turbulence displacement flow e.g. according to DIN 12980 / 09.96 is guaranteed at all times. With time increasing pressure difference of the filters should be compensated. Standby operation of the fan system is advantageous.

It is recommended, for example, to have at least all parameters, for example to be monitored according to DIN 12980 / 09.96. The alarm functions should in particular have to be at least DIN 12980 / 09.96 or DIN 12950 part 10 / 10.91.

When closing the engagement opening, it is advantageous to Monitor closing force. If a limit is exceeded an alarm (optical and acoustic) could be triggered and the closure of the engaging opening could become self-contained reopen and, if necessary, again after a time delay conclude. An alarm should also be triggered when the Self-check was not carried out successfully. In this Then the intervention opening must not open and the Errors should be shown on the display.

It is particularly advantageous if an emergency operation is provided which allows the engagement opening to be closed by hand, such as. in the event of a complete power failure. Possibly. can the Power supply to the drive motors battery-buffered or on similar way to be assured at least one Closing and / or shutting down the workbench is possible.

1. Sensoren für die Messung der LAF-Geschwindigkeit

2. Sensoren für die Differenzdruckmessung der Filter

3. Schaltkontakte der Endstellungen der Eingriffsöffnung

4. Temperatursensoren

5. Antriebsmotoren Eingriffsöffnung

6. Beleuchtung

7. Ladezustandskontrolle für Akkumulatoren (*)

8. elektromechanische Verriegelungen von Klappen und Türen (*)

The correct functioning of the following components can be checked during the self-check or self-check routine (the points marked with * can be provided as an option):

1. Sensors for measuring the LAF speed

2. Sensors for differential pressure measurement of the filters

3. Switch contacts of the end positions of the engagement opening

4. Temperature sensors

5. Drive motor opening

6. Lighting

7. State of charge control for accumulators (*)

8. electromechanical locking of flaps and doors (*)

DIN 12980 / 09.96
   Laboreinrichtungen - Zytostatika-Werkbänke - Anforderungen, Prüfung

DIN 12950 Teil 10 / 10.91
   Laboreinrichtungen - Sicherheitswerkbänke für mikrobiologische und biotechnologische Arbeiten - Anforderungen, Prüfung

DIN 57789 Teil 100 / 05.84
   Unterrichtsräume und Laboratorien - Einrichtungsgegenstände, Sicherheitsbestimmungen für energieversorgte Baueinheiten (entspricht VDE 0789 Teil 100)

DIN EN 292 Teil 2 / 06.95
   Sicherheit von Maschinen - Grundbegriffe, allgemeine Gestaltungsleitsätze; Teil 2: Technische Leitsätze und Spezifikationen

EN 50081-1

EN 50082-1

EN 60601-1-2

EU-Maschinenrichtlinie (89/392/EWG)

EU-Niederspannungsrichtlinie (73/23/EWG)

EU-EMV-Richtlinie (89/336/EWG)

In addition to the requirements of the various exemplary embodiments, fume cupboards according to the invention preferably meet the requirements of the following standards and guidelines:

DIN 12980 / 09.96
Laboratory equipment - Cytostatics workbenches - Requirements, testing

DIN 12950 part 10 / 10.91
Laboratory equipment - Safety workbenches for microbiological and biotechnological work - Requirements, testing

DIN 57789 part 100 / 05.84
Classrooms and laboratories - furnishings, safety regulations for energy-supplied building units (corresponds to VDE 0789 part 100)

DIN EN 292 part 2 / 06.95
Safety of machines - basic terms, general design principles; Part 2: Technical principles and specifications

EN 50081-1

EN 50082-1

EN 60601-1-2

EU Machinery Directive (89/392 / EEC)

EU Low Voltage Directive (73/23 / EEC)

EU EMC Directive (89/336 / EEC)

With a fume cupboard according to the invention can be an option a garbage disposal system with automatic sealing in plastic film in connection with the work area of the fume cupboard be provided. The waste disposal system is preferably such that in contrast to conventional systems, the air volume, that is in the film, reduced as much as possible. It is important to ensure that the plastic film escaping air cannot leave the work area. The Garbage disposal system is to be designed so that it is also already installed fume cupboards with the least effort can be retrofitted.

Extraction workbenches according to the invention can be of various widths are offered, which is why a modular structure of the housing is to be preferred. A possible standard width is e.g. 120 cm (working surface).

The side windows can be constructed so that various Special accessories (such as gas connections, cable bushings, Garbage disposal etc.) can be integrated. The side windows should therefore be exchanged with the least effort to let.

Even if not all characteristics, properties and effects in the figures of the drawing are shown, so that below If there is no reference to figures, the individual design options are for the expert from the present Documents easily and clearly.

The invention is not based on the above specific design options limited, but encompasses everything lies in the scope of the formulations, in particular the claims. The variants, changes, replacements and Supplements to the scope of the invention, which the expert without further functioning and / or acting as the same or similar recognizes.

Claims (13)

Extraction workbench with a work space that is accessible from the outside through at least one access opening, ventilation for extracting air contaminated with hazardous substances from the work space and a control for at least one operation of the extraction workbench, characterized in that the access opening (4) can be closed, and that the control (10) contains test devices by means of which a person's access authorization to the work space (2) can be determined and an opening of the closed intervention opening (4) can be triggered as a function of a determined access authorization. Extraction workbench according to Claim 1, characterized in that the test devices are further designed to release at least one of a plurality of operating modes of the extraction workbench (1) depending on a determined access authorization, and
that preferably at least one operating mode, a service mode and / or a cleaning mode are provided as operating modes, preferably depending on the operating mode in particular an opening degree of the engagement opening (4) can be set and / or a decontamination of the working area (2) can (semi) be carried out automatically. Extraction workbench according to claim 1 or 2, characterized in that the test devices contain input devices via which personal and / or personal identification data can be recorded, and
that preferably the input devices contain: recording devices for data carriers, preferably pen or card-shaped data carriers, for optical, electrical and / or magnetic detection of personal data from the data carriers, and / or
manually operable input means, such as in particular buttons or buttons, for manually entering personal data, in particular PINs, and / or
Receiving devices for personal data originating from contactlessly transmitting data carriers, in particular transponders, and / or
Detection devices for individual body characteristics as personal data of operators. Extraction workbench according to one of the preceding claims, characterized in that display devices for operator guidance and / or operator information are provided before, during and / or after operation of the extraction workbench (1) outside and / or inside the work area (2), and
that preferably the display devices are further designed for entering data, including personal and / or access authorization data, such as in the form of buttons, including membrane buttons, integrated lighting devices or touch-sensitive screens. Fume cupboard according to one of the preceding claims,
characterized by
that devices for detecting work inside the work space (2) are provided and are designed to close the workspace after a detection of work in the interior of the work space (2) for a predeterminable time, in particular depending on a released operating mode Trigger intervention opening (4) and preferably to end the current access authorization, and / or
that lockable containers, cupboards and / or reservoirs are accessible in the interior of the work space (2) depending on a determined access authorization, and / or
that in the interior of the work space (2) devices for detecting a position of an object, such as a hand, are arranged in order to trigger an automatic function of a position of an object, in particular garbage disposal devices and / or garbage storage and / or accessible from the interior of the fume cupboard -to automatically operate disposal facilities and / or preparation and device storage rooms, preferably to open them automatically and to close them again after a predetermined time without passage of material. Fume cupboard according to one of the preceding claims, characterized in that monitoring devices are provided which are designed to detect at least one operating state of at least one component of the fume cupboard (1) and / or at least one item of information relating to the dangerous substances in the fume cupboard (1), and that in particular alarm devices are provided, by means of which deviations from normal operation can be indicated acoustically and / or optically as a function of detection results of the monitoring devices. Extraction workbench according to one of the preceding claims, characterized in that
that the control devices (10) are, in particular, electronic control devices which are also designed for controlling at least one optional, adjustable and / or controllable operating parameter or at least one such component of the fume cupboard (1), and possibly preferably for controlling at least one operating parameter or at least one Components of the fume cupboard (1) are designed as a function of detection results of the monitoring devices, and / or that the mode of operation of the monitoring devices and / or of the control devices (10) can be set manually via a control panel, in particular via a key control panel, preferably the mode of operation of the monitoring devices and / or the control devices and / or the settings of the control panel can be displayed by means of display devices, and / or
that protocol devices are provided, by means of which the operating data of the fume cupboard, including the data of granted access, and / or possibly detection results of the monitoring devices can be logged. Fume cupboard according to one of the preceding claims,
characterized by
that data reading and / or data input devices are provided, by means of which operating parameters and / or operating or application control parameters can be entered, and / or
that means are provided for producing an air curtain closing the engagement opening and / or means for automatically closing filter means when they are removed from the fume cupboard, and / or
that the ventilation for extracting air contaminated with hazardous substances runs from the work space even when the opening is closed, preferably with a lower output and particularly preferably with an output of about 20% based on the output with the opening open (4). Operating method for a fume cupboard (1) with a Work space (2) that can be closed by at least one Access opening (4) is accessible from the outside, ventilation (3) for vacuuming contaminated with hazardous substances Air from the work area (2) and a control (10) for at least one operation of the fume cupboard (1), where access authorization by means of test facilities a person to the work room (2) is determined, and then depending on a determined access authorization the closed engagement opening (4) to the inside of the work area (2) opened for the operator becomes. Operating method according to claim 9, characterized in that at least one of a plurality of operating modes of the fume cupboard (1), such as in particular a work operation, a service operation and / or a cleaning operation, can be released by the access authorization determined by the test devices, and that preferably depending on from the operating mode, in particular, the intervention opening (4) is variably opened and / or a decontamination of the work area (2) (semi) is carried out automatically. Operating method according to claim 9 or 10, characterized in
that the access authorization can be obtained by entering personal and / or personal identification data by means of input devices in the test facilities, and / or
that work inside the work space (2) is detected and, in particular after a work has not been recorded inside the work space (2), for a predeterminable time, preferably depending on a released operating mode, the engagement opening (4) is closed and preferably the current access authorization is ended, and / or
that lockable containers, cupboards and / or reservoirs are released in the interior of the work space (2) depending on a determined access authorization for opening, and / or
that in the interior of the work space (2), depending on a position of an object, an automatic mechanism is triggered, in particular to automatically operate waste disposal devices and / or waste storage and / or disposal devices and / or preparation and device storage rooms accessible from the interior of the fume cupboard (1), preferably opened automatically and closed again after a predeterminable time without passage of material, and / or
that at least one operating state of at least one component of the fume cupboard (1) and / or at least one item of information relating to the dangerous substances in the fume cupboard (1) is detected by means of monitoring devices, and that in particular deviations from normal operation as a function of detection results of the monitoring devices by means of alarm devices acoustically and / or be displayed optically. Operating method according to one of claims 9 to 11, characterized in that
that the control devices (10), in particular electronic control devices, control at least one optional, adjustable and / or controllable operating parameter or at least one such component of the fume cupboard (1), and possibly preferably at least one operating parameter or at least one component of the fume cupboard (1 ) is controlled as a function of detection results of the monitoring devices, and / or
that the mode of operation of the monitoring devices and / or the control devices (10) is set manually via a control panel, in particular via a button control panel, the mode of operation of the monitoring devices and / or the control devices (10) and / or the settings of the control panel preferably being displayed by means of display devices will, and / or
that the operating data of the fume cupboard (1), including the data of granted access, and / or possibly detection results of the monitoring devices are logged. Operating method according to one of claims 9 to 12, characterized in
that operating parameters and / or operating or application control parameters are entered by means of data readers and / or data input devices, and / or
that an air curtain closing the engagement opening (4) is generated and / or filter devices are automatically closed when they are removed from the fume cupboard (1), and / or
that the ventilation for extracting air contaminated with hazardous substances from the work space (2) is also operated with the access opening (4) closed, preferably with a lower output and particularly preferably with an output of about 20% based on the output with the opening open (4) .

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