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EP1354643B1 - Remotely controllable safety workbench - Google Patents

Remotely controllable safety workbench Download PDF

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Publication number
EP1354643B1
EP1354643B1 EP03006582A EP03006582A EP1354643B1 EP 1354643 B1 EP1354643 B1 EP 1354643B1 EP 03006582 A EP03006582 A EP 03006582A EP 03006582 A EP03006582 A EP 03006582A EP 1354643 B1 EP1354643 B1 EP 1354643B1
Authority
EP
European Patent Office
Prior art keywords
control unit
safety cabinet
remote control
housing
cabinet according
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.)
Expired - Lifetime
Application number
EP03006582A
Other languages
German (de)
French (fr)
Other versions
EP1354643A3 (en
EP1354643A2 (en
Inventor
Gerd Ross
Walter Glück
Stefan Mirsu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thermo Electron LED GmbH
Original Assignee
Thermo Electron LED GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Thermo Electron LED GmbH filed Critical Thermo Electron LED GmbH
Publication of EP1354643A2 publication Critical patent/EP1354643A2/en
Publication of EP1354643A3 publication Critical patent/EP1354643A3/en
Application granted granted Critical
Publication of EP1354643B1 publication Critical patent/EP1354643B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B15/00Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
    • B08B15/02Preventing 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
    • B08B15/023Fume cabinets or cupboards, e.g. for laboratories

Definitions

  • the invention relates to a remote-controlled safety workbench, in particular a safety workbench whose device functions can be controlled with an infrared remote control.
  • Conventional microbiological safety workbenches usually have a fixed operating unit, which is usually attached to the outside of the housing.
  • a safety workbench is for example in the DE 4441784 C2 the applicant described.
  • the user To be able to use the various functions of the safety workbench during the work, the user must take his hands out of the inner working area enclosed by a housing. In the process, traces of the microbiological cultures processed in the work area can be unintentionally dragged outwards from the safety workbench and lead to contamination.
  • impurities are introduced into the interior of the safety workbench. In the worst case, this can lead to damage to the cultivated crops and to the falsification of the test results.
  • Object of the invention is accordingly to provide a microbiological safety workbench, in which the risk of entrainment of contaminants in the interior, which is used for processing of samples, as well as the entrainment of contaminants from this interior is largely reduced.
  • the invention thus relates to a safety workbench with an interior space enclosed by a housing and a housing front side, which has a work opening which can be closed by a height-adjustable windshield.
  • the safety cabinet has a fixed in the Housing integrated control unit for controlling device functions, which can basically be designed as the control units in conventional safety workbenches.
  • the safety workbench according to the invention has a remote from the workbench in the interior and removable remote control unit for selectively controlling device functions.
  • To receive the wirelessly transmitted by the remote control unit control signals in the safety cabinet also has a receiver integrated.
  • the remote control unit not connected to the housing of the safety cabinet can be taken into the interior of the safety cabinet and taken out by the processor, without having to touch the non-sterile areas with his hands to operate the safety cabinet.
  • the risk of contamination by entry of impurities from the outside into the interior of the workbench is significantly reduced.
  • the remote control unit can be previously decontaminated in a manner known per se. Spray disinfectants are suitable for this purpose, for example.
  • the remote control unit is surrounded by a removable protective cover.
  • this protective cover facilitates the disinfection of the remote control unit and, on the other hand, it can, if desired, be removed and disposed of before a change of location in order to prevent carry-over of contaminants adhering to the protective cover.
  • remote controls per safety cabinet can be used.
  • one of the remote controls remain in the interior of the safety cabinet, while another remote control is used in the outer area of the safety cabinet.
  • the remote control for the interior and those for the outside space can visually differ from each other. For example, they may be identified by different colors.
  • Preferred modulation frequencies are in the range between 34 and 42 kHz, more preferably at 38 kHz. At these frequencies, no malfunction is expected from the safety cabinet itself or any other equipment installed in laboratories or hospitals or otherwise typically located near the safety cabinet.
  • the integrated into the safety cabinet receiver for the control signals of the remote control unit is designed to receive the said emitted frequencies. Infrared transmitters and receivers with the specified specifications are generally known from other areas and therefore need not be explained in detail here.
  • the remote control unit of the invention basically all device functions of a safety workbench can be controlled.
  • the remote control unit according to the invention controls at least one of the following device functions: switching on and off of the safety workbench, switching on and off of sockets integrated in the safety workbench, switching on and off the device lighting, moving the front windscreen to open and close it, switching on and possibly switching off a disinfection unit, releasing a contact in safe operation of the safety cabinet, setting a timer for delayed operation of the safety cabinet, selecting certain menu functions or display functions in a display, setting device parameters and service settings.
  • the remote control by means of the remote control menu-controlled by calling certain menu items and confirmation of the selected menu function, which is displayed for example in a display element, take place. Also combinations of both possibilities are conceivable.
  • the display element can be located in the remote control unit and / or in the safety workbench itself.
  • the control unit permanently integrated into the safety workbench can basically be designed as known in the art. According to the invention, however, it is preferred if the permanently integrated operating unit merely serves to control the basic device functions. These are, for example, at least one of the following functions: switching on and off the safety workbench, switching on ventilation or lighting, switching on the supply voltage for the integrated sockets, the method of height-adjustable front screen and the acknowledgment of an alarm signal, which can be triggered in case of malfunction of the safety cabinet.
  • the permanently integrated operating unit thus serves preferably only as an emergency circuit in the event that a control of the device by means of the remote control unit is no longer possible, be it that the remote control unit is misplaced or failed.
  • the ratio between permanently integrated control unit and remote control unit is therefore expedient so that the control signals sent by the permanently integrated control unit have a higher priority than the control signals sent by the remote control unit.
  • the permanently integrated control unit can be used to undo or modify device functions controlled by the remote control unit.
  • remote control unit and / or control unit integrated in the safety workbench may be designed such that a specific duration of a command, ie a certain duration of a key or switch pressure, is required to trigger a specific device function.
  • This time coding can be provided for one or more command functions, for example for the function of switching the safety workbench on and off.
  • it can be provided for the remote control unit and / or permanently integrated operating unit that no control signal is passed on at the same time or substantially simultaneously with the printing of several keys or switches. In this way, malfunctions can be prevented by unintentional pressing of adjacent keys.
  • the safety workbench In order to inform the user in which operating state the safety workbench is located and / or to display the operating menu or the device function controlled by the remote control unit or the integrated operating unit, the safety workbench according to the invention expediently has a display element.
  • This is preferably arranged in the region of the housing of the safety workbench and preferably in its interior, in particular in the region of the rear wall of the housing.
  • This display element can basically correspond to the display elements already used for conventional safety workbenches. For example, it may be an LCD or LED display.
  • the display element In order to prevent the display element from negatively influencing the flow conditions in the interior of the safety workbench, it is preferably integrated into a housing wall in such a way that it terminates flush with it. If this is not possible, for example, for reasons of space and the display element protrudes into the interior, it has expediently a housing, which aerodynamically designed. This can be done, for example, by chamfering the side regions of the display element housing. Also, the housing of the remote control unit can be designed aerodynamically.
  • the receiver for the remote control unit according to the invention is integrated in the display element. Even with attachment of the display element in the interior of the safety cabinet, the reception of the control signals that are emitted from a remote control unit located outside the safety cabinet through the windscreen or the side walls of the workbench through readily possible.
  • To store the remote control shelves for the remote control can be mounted on the outside of the housing and / or in the interior of the safety cabinet.
  • FIG. 1 an inventive safety cabinet 1 with an interior 3, which is enclosed by a housing 2.
  • a work opening 5 in the housing front side 4 allows access to the interior 3 and is closed by a height-adjustable windshield 6.
  • the safety cabinet 1 basically corresponds to a conventional safety workbench, as for example in the DE 4441784 C2 is described and has a ventilation system, which also basically corresponds to the prior art.
  • the type of operation differs in the safety workbench invention from that of conventional workbenches.
  • the operation of the safety cabinet is mainly by means of a remote control unit 8, which is not spatially connected to the safety cabinet.
  • the remote control unit 8 allows the control of all device functions, such as switching on and off the workbench, the regulation of the ventilation system, the switching on and off of the lighting, the raising and lowering of the windshield 6, the switching on and off of the integrated into the device sockets, controlling the integrated into the rear wall 11 display element 10, the disinfection of the workbench, the programming of a timer, the release or Locking contacts, setting device parameters or changing or making service settings, etc.
  • device functions such as switching on and off the workbench, the regulation of the ventilation system, the switching on and off of the lighting, the raising and lowering of the windshield 6, the switching on and off of the integrated into the device sockets, controlling the integrated into the rear wall 11 display element 10, the disinfection of the workbench, the programming of a timer, the release or Locking contacts, setting device parameters or changing or making service settings, etc.
  • buttons are provided in the remote control unit, with which the individual device functions can be triggered.
  • This is exemplified by the in Fig. 2 reproduced remote control unit shown.
  • the remote control unit 8 six keys are arranged one above the other, with which individual device functions can be controlled.
  • the top of the buttons is used to call the timer, the second-highest to turn on and off the device lighting, etc.
  • the respectively called menu item of the operating menu is displayed to the user by means of the display element 10, which is integrated into the rear wall 11 of the safety cabinet 1.
  • the housing 12 of the display element 10 projects slightly into the interior 3 of the safety workbench 1. In order to disturb the flow conditions within the interior 3 as little as possible, the housing 12 is flow-optimized. For this purpose, the lateral edge portions 13 of the housing 12 are chamfered, so that the housing gradually increases in height from the outer edges inwardly.
  • the display element 10 is in Fig. 3 shown in more detail. Only the display area is shown while the enclosing side housing is omitted.
  • the display element 10 has in the upper part of a display 13 for reproducing a menu text or other message, for example an error message.
  • various light-emitting diodes 14 are present, to which the user of the safety workbench can read the operating state and the current menu level of the operating menu in which he is currently located.
  • the receiver 9 for receiving the control signals from the remote control unit 8 is integrated into the display element 10. The receiver is shown here only schematically.
  • the receiver is, for example, one with a modulation frequency of 38 kHz (for example, IC SFH5110-38 from Osram GmbH).
  • the bursts each consist of six pulses with a duration of 13 ⁇ s, so that a burst is 156 ⁇ s long.
  • the transmission information is coded by the spacing of the bursts. There are two distances, namely long (1.792 ms, corresponding to logical 0) and short (1.280 ms, corresponding to logical 1).
  • the times are each measured from the beginning of a burst to the beginning of the next burst.
  • a complete transmit pattern consists of a total of 17 bits, one start and two eight information bits.
  • the first eight bits represent the code, the second eight bits repeat the code as a complement. Thus, the total duration is always 24.576 ms.
  • the code consists of four bits for the station identification and four bits for the button identification. In order to avoid unintentional operating errors, no signal is sent if several keys are pressed simultaneously within 50 ms.
  • the safety workbench 1 has an operating element 7 integrated in the workbench.
  • the integrated control element 7 mainly serves as a safety or emergency circuit, for example in the event that the remote control unit 8 has been misplaced or has a malfunction.
  • the operating unit 7 is therefore reduced to the control of basic device functions. These include switching on and off the workbench, switching on the ventilation or lighting or the supply voltage for the integrated sockets.
  • the front screen 6 can be moved up and down with the integrated operating unit 7. Expediently, an alarm signal can also be acknowledged with the operating unit 7, which is triggered in the event of a malfunction of the safety workbench 1. Commands given to the operating unit 7 take precedence over those given to the remote control unit 8. In this way, it is ensured that the safety workbench 1 can be operated by the integrated operating unit 7 in the event of a malfunction of the remote control unit 8.

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Description

Die Erfindung betrifft eine fernbedienbare Sicherheitswerkbank, insbesondere eine Sicherheitswerkbank, deren Gerätefunktionen mit einer Infrarot-Fernbedienung gesteuert werden können.The invention relates to a remote-controlled safety workbench, in particular a safety workbench whose device functions can be controlled with an infrared remote control.

Herkömmliche mikrobiologische Sicherheitswerkbänke verfügen üblicherweise über eine fest installierte Bedieneinheit, welche meist an der Gehäuseaußenseite befestigt ist. Eine derartige Sicherheitswerkbank ist beispielsweise in der DE 4441784 C2 der Anmelderin beschrieben. Um die verschiedenen Funktionen der Sicherheitswerkbank während der Arbeiten nutzen zu können, muss der Anwender die Hände aus dem von einem Gehäuse umschlossenen inneren Arbeitsbereich herausnehmen. Dabei können Spuren der im Arbeitsbereich bearbeiteten mikrobiologischen Kulturen unbeabsichtigt an den Händen aus der Sicherheitswerkbank heraus nach außen geschleppt werden und hier zu Kontaminationen führen. Umgekehrt ist es möglich, dass beim Bedienen des nicht sterilen Bedienelements an der Gehäuseaußenseite Verunreinigungen in den Innenraum der Sicherheitswerkbank eingeschleppt werden. Dies kann im schlimmsten Fall zur Schädigung der bearbeiteten Kulturen und zur Verfälschung der Versuchsergebnisse führen.Conventional microbiological safety workbenches usually have a fixed operating unit, which is usually attached to the outside of the housing. Such a safety workbench is for example in the DE 4441784 C2 the applicant described. To be able to use the various functions of the safety workbench during the work, the user must take his hands out of the inner working area enclosed by a housing. In the process, traces of the microbiological cultures processed in the work area can be unintentionally dragged outwards from the safety workbench and lead to contamination. Conversely, it is possible that when operating the non-sterile control element on the outside of the housing impurities are introduced into the interior of the safety workbench. In the worst case, this can lead to damage to the cultivated crops and to the falsification of the test results.

Dokument DE-4 091 373 C2 beschreibt eine gattungsgemäße Sicherheitswerkbank.document DE-4 091 373 C2 describes a generic safety workbench.

Aufgabe der Erfindung ist es entsprechend, eine mikrobiologische Sicherheitswerkbank anzugeben, bei welcher die Gefahr des Einschleppens von Verunreinigungen in den Innenraum, welcher zur Bearbeitung von Proben dient, sowie des Herausschleppens von Verunreinigungen aus diesem Innenraum weitestgehend vermindert wird. Object of the invention is accordingly to provide a microbiological safety workbench, in which the risk of entrainment of contaminants in the interior, which is used for processing of samples, as well as the entrainment of contaminants from this interior is largely reduced.

Die Lösung dieser Aufgabe gelingt mit der Sicherheitswerkbank gemäß Anspruch 1. Bevorzugte Ausgestaltungen und Weiterbildung der Sicherheitswerkbank sind den Unteransprüchen zu entnehmen.The solution of this problem is achieved with the safety workbench according to claim 1. Preferred embodiments and further development of the safety workbench can be found in the dependent claims.

Die Erfindung betrifft also eine Sicherheitswerkbank mit einem von einem Gehäuse umschlossenen Innenraum und einer Gehäusefrontseite, welche eine Arbeitsöffnung aufweist, die von einer höhenverstellbaren Frontscheibe verschließbar ist. Die Sicherheitswerkbank weist eine fest in das Gehäuse integrierte Bedieneinheit zum Steuern von Gerätefunktionen auf, welche grundsätzlich wie die Bedieneinheiten in herkömmlichen Sicherheitswerkbänken ausgebildet sein kann. Zusätzlich zu der fest integrierten Bedieneinheit besitzt die erfindungsgemäße Sicherheitswerkbank eine von der Werkbank räumlich getrennte in den Innenraum hinein-und herausnehmbare Fernbedienungseinheit zum wahlweisen Steuern von Gerätefunktionen. Zum Empfang der von der Fernbedienungseinheit drahtlos ausgesandten Steuersignale ist in die Sicherheitswerkbank außerdem ein Empfänger integriert.The invention thus relates to a safety workbench with an interior space enclosed by a housing and a housing front side, which has a work opening which can be closed by a height-adjustable windshield. The safety cabinet has a fixed in the Housing integrated control unit for controlling device functions, which can basically be designed as the control units in conventional safety workbenches. In addition to the permanently integrated control unit, the safety workbench according to the invention has a remote from the workbench in the interior and removable remote control unit for selectively controlling device functions. To receive the wirelessly transmitted by the remote control unit control signals in the safety cabinet also has a receiver integrated.

Die nicht mit dem Gehäuse der Sicherheitswerkbank verbundene Fernbedienungseinheit kann vom Bearbeiter mit in den Innenraum der Sicherheitswerkbank hinein genommen und aus diesem herausgenommen werden, ohne dass zum Bedienen der Sicherheitswerkbank nicht sterile Bereiche mit den Händen berührt werden müssen. Dadurch wird die Gefahr der Kontamination durch Eintragung von Verunreinigungen aus dem Außenbereich in den Innenraum der Werkbank deutlich vermindert. Um zu verhindern, dass durch Herausnehmen der Fernbedienungseinheit aus dem Innenraum der Sicherheitswerkbank Verunreinigungen nach außen getragen werden, kann die Fernbedienungseinheit zuvor auf an sich bekannte Weise dekontaminiert werden. Sprüh-Desinfektionsmittel sind beispielsweise hierfür geeignet.The remote control unit not connected to the housing of the safety cabinet can be taken into the interior of the safety cabinet and taken out by the processor, without having to touch the non-sterile areas with his hands to operate the safety cabinet. As a result, the risk of contamination by entry of impurities from the outside into the interior of the workbench is significantly reduced. In order to prevent contaminants from being carried to the outside by removing the remote control unit from the interior of the safety cabinet, the remote control unit can be previously decontaminated in a manner known per se. Spray disinfectants are suitable for this purpose, for example.

In einer bevorzugten Ausführungsform der Erfindung ist die Fernbedienungseinheit von einer abnehmbaren Schutzhülle umgeben. Diese Schutzhülle erleichtert einerseits die Desinfektion der Fernbedienungseinheit und andererseits kann sie, falls gewünscht, vor einem Ortswechsel abgenommen und entsorgt werden, um das Verschleppen von an der Schutzhülle haftenden Verunreinigungen zu verhindern.In a preferred embodiment of the invention, the remote control unit is surrounded by a removable protective cover. On the one hand, this protective cover facilitates the disinfection of the remote control unit and, on the other hand, it can, if desired, be removed and disposed of before a change of location in order to prevent carry-over of contaminants adhering to the protective cover.

In einer Weiterbildung der Erfindung können auch mehrere Fernbedienungen pro Sicherheitswerkbank eingesetzt werden. Dabei kann beispielsweise eine der Fernbedienungen im Innenraum der Sicherheitswerkbank verbleiben, während eine andere Fernbedienung im Außenbereich der Sicherheitswerkbank verwendet wird. Um Verwechslungen zwischen den Fernbedienungen auszuschließen, können sich die Fernbedienung für den Innenraum und diejenigen für den Außenraum optisch voneinander unterscheiden. Beispielsweise können Sie durch unterschiedliche Farben gekennzeichnet sein.In one embodiment of the invention, several remote controls per safety cabinet can be used. In this case, for example, one of the remote controls remain in the interior of the safety cabinet, while another remote control is used in the outer area of the safety cabinet. In order to avoid confusion between the remote controls, the remote control for the interior and those for the outside space can visually differ from each other. For example, they may be identified by different colors.

Zur Signalübertragung kommen grundsätzlich alle für Fernbedienungen bekannten Signalfrequenzen in Betracht. Aus Sicherheitsgründen ist jedoch darauf zu achten, dass die von der Fernbedienungseinheit ausgesandten Signale weder die Gerätefunktionen der Sicherheitswerkbank selbst noch diejenigen Funktionen von möglicherweise in Nachbarschaft zu der Sicherheitswerkbank aufgestellten Geräten beeinträchtigen. Umgekehrt dürfen auch die von den Nachbargeräten ausgesandten Strahlungen nicht zu Fehlfunktionen der Sicherheitswerkbank führen. Aus diesem Grund ist es bevorzugt, im Rahmen der Erfindung eine Infrarot-Fernbedienung zu verwenden. Bevorzugte Modulationsfrequenzen liegen im Bereich zwischen 34 und 42 kHz, besonders bevorzugt bei 38 kHz. Bei diesen Frequenzen sind weder Funktionsstörungen bei der Sicherheitswerkbank selbst noch bei anderen in Laboratorien oder Krankenhäusern oder sonst üblicherweise in der Nähe von Sicherheitswerkbank aufgestellten Geräten zu erwarten. Der in die Sicherheitswerkbank integrierte Empfänger für die Steuersignale der Fernbedienungseinheit ist entsprechend zum Empfang der genannten ausgesendeten Frequenzen ausgebildet. Infrarot-Sender und Empfänger mit den angegebenen Spezifikationen sind aus anderen Bereichen grundsätzlich bekannt und müssen daher hier nicht näher erläutert werden.For signal transmission basically all signal frequencies known for remote controls come into consideration. For safety reasons, however, care should be taken to ensure that the signals transmitted by the remote control unit do not interfere with either the safety cabinet functions themselves or those possibly adjacent to the safety cabinet impaired devices. Conversely, the radiations emitted by the neighboring devices must not lead to malfunctions of the safety workbench. For this reason, it is preferable to use an infrared remote control within the scope of the invention. Preferred modulation frequencies are in the range between 34 and 42 kHz, more preferably at 38 kHz. At these frequencies, no malfunction is expected from the safety cabinet itself or any other equipment installed in laboratories or hospitals or otherwise typically located near the safety cabinet. The integrated into the safety cabinet receiver for the control signals of the remote control unit is designed to receive the said emitted frequencies. Infrared transmitters and receivers with the specified specifications are generally known from other areas and therefore need not be explained in detail here.

Mit der Fernbedienungseinheit der Erfindung können grundsätzlich alle Gerätefunktionen einer Sicherheitswerkbank gesteuert werden. Beispielsweise steuert die erfindungsgemäße Fernbedienungseinheit wenigstens eine der folgenden Gerätefunktionen: Ein- und Ausschalten der Sicherheitswerkbank, Ein- und Ausschalten von in die Sicherheitswerkbank integrierten Steckdosen, Ein - und Ausschalten der Gerätebeleuchtung, Verfahren der verstellbaren Frontscheibe zum Öffnen und Schließen derselben, Einschalten und gegebenenfalls Ausschalten einer Desinfektionseinheit, Freigeben eines Kontaktes im sicheren Betrieb der Sicherheitswerkbank, Einstellen eines Timers zum zeitversetzten Betrieb der Sicherheitswerkbank, die Auswahl bestimmter Menüfunktionen oder Anzeigefunktionen in einem Display, das Einstellen von Geräteparametern und Serviceeinstellungen.With the remote control unit of the invention, basically all device functions of a safety workbench can be controlled. For example, the remote control unit according to the invention controls at least one of the following device functions: switching on and off of the safety workbench, switching on and off of sockets integrated in the safety workbench, switching on and off the device lighting, moving the front windscreen to open and close it, switching on and possibly switching off a disinfection unit, releasing a contact in safe operation of the safety cabinet, setting a timer for delayed operation of the safety cabinet, selecting certain menu functions or display functions in a display, setting device parameters and service settings.

Prinzipiell ist es dabei möglich, einer bestimmten Gerätefunktion eine bestimmte Taste oder eine Tastenkombination auf der Fernbedienung zuzuweisen. Alternativ kann die Steuerung mittels der Fernbedienung auch menügesteuert durch Aufruf bestimmter Menüpunkte und Bestätigung der gewählten Menüfunktion, welche beispielsweise in einem Anzeigeelement angezeigt wird, erfolgen. Auch Kombinationen beider Möglichkeiten sind denkbar. Das Anzeigeelement kann sich dabei in der Fernbedienungseinheit und/oder in der Sicherheitswerkbank selbst befinden.In principle, it is possible to assign a specific key function or key combination on the remote control to a specific device function. Alternatively, the control by means of the remote control menu-controlled by calling certain menu items and confirmation of the selected menu function, which is displayed for example in a display element, take place. Also combinations of both possibilities are conceivable. The display element can be located in the remote control unit and / or in the safety workbench itself.

Die in die Sicherheitswerkbank fest integrierte Bedieneinheit kann grundsätzlich wie im Stand der Technik bekannt ausgebildet sein. Erfindungsgemäß bevorzugt ist es jedoch, wenn die fest integrierte Bedieneinheit lediglich zur Steuerung der Gerätegrundfunktionen dient. Dabei handelt es sich beispielsweise um wenigstens eine der folgenden Funktionen: Ein- und Ausschalten der Sicherheitswerkbank, Einschalten der Lüftung oder der Beleuchtung, Einschalten der Versorgungsspannung für die integrierten Steckdosen, das Verfahren der höhenverstellbaren Frontscheibe sowie das Quittieren eines Alarmsignals, welches bei Fehlfunktionen der Sicherheitswerkbank ausgelöst werden kann. Die fest integrierte Bedieneinheit dient also vorzugsweise lediglich als Notschaltung für den Fall, dass eine Steuerung des Geräts mittels der Fernbedienungseinheit nicht mehr möglich ist, sei es, dass die Fernbedienungseinheit verlegt oder ausgefallen ist. Das Verhältnis zwischen fest integrierter Bedieneinheit und Fernbedienungseinheit ist deshalb zweckmäßig so, dass die von der fest integrierten Bedieneinheit gesendeten Steuersignale eine höhere Priorität als die von der Fernbedienungseinheit gesendeten Steuersignale besitzen. Mit der fest integrierten Bedieneinheit lassen sich also von der Fernbedienungseinheit gesteuerte Gerätefunktionen rückgängig machen oder abändern.The control unit permanently integrated into the safety workbench can basically be designed as known in the art. According to the invention, however, it is preferred if the permanently integrated operating unit merely serves to control the basic device functions. These are, for example, at least one of the following functions: switching on and off the safety workbench, switching on ventilation or lighting, switching on the supply voltage for the integrated sockets, the method of height-adjustable front screen and the acknowledgment of an alarm signal, which can be triggered in case of malfunction of the safety cabinet. The permanently integrated operating unit thus serves preferably only as an emergency circuit in the event that a control of the device by means of the remote control unit is no longer possible, be it that the remote control unit is misplaced or failed. The ratio between permanently integrated control unit and remote control unit is therefore expedient so that the control signals sent by the permanently integrated control unit have a higher priority than the control signals sent by the remote control unit. The permanently integrated control unit can be used to undo or modify device functions controlled by the remote control unit.

Um Fehlbedienungen möglichst auszuschließen, können Fernbedienungseinheit und/oder in die Sicherheitswerkbank integrierte Bedieneinheit so ausgebildet sein, dass zum Auslösen einer bestimmten Gerätefunktionen eine bestimmte Dauer einer Befehlsgabe, also eine bestimmte Dauer eines Tasten- oder Schalterdrucks, erforderlich ist. Diese Zeitkodierung kann für eine oder mehrere Befehlsfunktionen vorgesehen werden, beispielsweise für die Funktion des Ein- und Ausschaltens der Sicherheitswerkbank.
Weiterhin kann für Fernbedienungseinheit und/oder fest integrierte Bedieneinheit vorgesehen werden, dass bei gleichzeitigem oder im wesentlichen gleichzeitigem Druck mehrerer Tasten oder Schalter kein Steuersignal weitergegeben wird. Auf diese Weise können Fehlfunktionen durch unbeabsichtigtes Drücken nebeneinander liegender Tasten verhindert werden.
In order to exclude any possible incorrect operation, remote control unit and / or control unit integrated in the safety workbench may be designed such that a specific duration of a command, ie a certain duration of a key or switch pressure, is required to trigger a specific device function. This time coding can be provided for one or more command functions, for example for the function of switching the safety workbench on and off.
Furthermore, it can be provided for the remote control unit and / or permanently integrated operating unit that no control signal is passed on at the same time or substantially simultaneously with the printing of several keys or switches. In this way, malfunctions can be prevented by unintentional pressing of adjacent keys.

Um den Anwender darüber zu informieren, in welchem Betriebszustand sich die Sicherheitswerkbank befindet und/oder um das Bedienungsmenü bzw. die von der Fernbedienungseinheit oder der integrierten Bedieneinheit angesteuerte Gerätefunktion anzuzeigen, weist die erfindungsgemäße Sicherheitswerkbank zweckmäßig ein Anzeigeelement auf. Dieses ist bevorzugt im Bereich des Gehäuses der Sicherheitswerkbank und vorzugsweise in deren Innenraum, insbesondere im Bereich der Gehäuserückwand, angeordnet. Dieses Anzeigeelement kann grundsätzlich den bereits für herkömmliche Sicherheitswerkbänke verwendeten Anzeigeelementen entsprechen. Beispielsweise kann es sich um ein LCD- oder LED-Display handeln.In order to inform the user in which operating state the safety workbench is located and / or to display the operating menu or the device function controlled by the remote control unit or the integrated operating unit, the safety workbench according to the invention expediently has a display element. This is preferably arranged in the region of the housing of the safety workbench and preferably in its interior, in particular in the region of the rear wall of the housing. This display element can basically correspond to the display elements already used for conventional safety workbenches. For example, it may be an LCD or LED display.

Um zu verhindern, dass das Anzeigeelement die Strömungsverhältnisse im Innenraum der Sicherheitswerkbank negativ beeinflusst, ist es vorzugsweise so in einer Gehäusewand integriert, dass es mit dieser bündig abschließt. Wenn dies beispielsweise aus Platzgründen nicht möglich ist und das Anzeigeelement in den Innenraum hineinragt, weist es zweckmäßig ein Gehäuse auf, welches strömungsgünstig ausgebildet ist. Dies kann beispielsweise durch Anschrägen der Seitenbereiche des Anzeigeelement-Gehäuses geschehen. Auch das Gehäuse der Fernbedienungseinheit kann strömungsgünstig ausgebildet sein.In order to prevent the display element from negatively influencing the flow conditions in the interior of the safety workbench, it is preferably integrated into a housing wall in such a way that it terminates flush with it. If this is not possible, for example, for reasons of space and the display element protrudes into the interior, it has expediently a housing, which aerodynamically designed. This can be done, for example, by chamfering the side regions of the display element housing. Also, the housing of the remote control unit can be designed aerodynamically.

Besonders bevorzugt ist der Empfänger für die erfindungsgemäße Fernbedienungseinheit in das Anzeigeelement integriert. Auch bei Anbringung des Anzeigeelements im Innenraum der Sicherheitswerkbank ist der Empfang der Steuersignale, die von einer außerhalb der Sicherheitswerkbank befindlichen Fernbedienungseinheit abgegebenen werden, durch die Frontscheibe oder die Seitenwände der Werkbank hindurch ohne weiteres möglich.Particularly preferably, the receiver for the remote control unit according to the invention is integrated in the display element. Even with attachment of the display element in the interior of the safety cabinet, the reception of the control signals that are emitted from a remote control unit located outside the safety cabinet through the windscreen or the side walls of the workbench through readily possible.

Zum Aufbewahren der Fernbedienung können am Gehäuseäußeren und/oder im Innenraum der Sicherheitswerkbank Ablagen für die Fernbedienung angebracht sein.To store the remote control shelves for the remote control can be mounted on the outside of the housing and / or in the interior of the safety cabinet.

Die Erfindung soll nachfolgend anhand einer Zeichnung näher erläutert werden. Darin zeigen schematisch:

Fig. 1
eine erfindungsgemäße Sicherheitswerkbank mit zugehöriger Fernbedienungseinheit in perspektivischer Darstellung,
Fig. 2
die Fernbedienungseinheit gemäß Fig. 1 in Draufsicht und
Fig. 3
das Anzeigeelement mit integriertem Empfänger der Sicherheitswerkbank gemäß Fig. 1 in Draufsicht.
The invention will be explained in more detail with reference to a drawing. In it show schematically:
Fig. 1
a security workbench according to the invention with associated remote control unit in a perspective view,
Fig. 2
the remote control unit according to Fig. 1 in plan view and
Fig. 3
the display element with integrated receiver of the safety cabinet according to Fig. 1 in plan view.

Im einzelnen zeigt Figur 1 eine erfindungsgemäße Sicherheitswerkbank 1 mit einem Innenraum 3, welcher von einem Gehäuse 2 umschlossen wird. Eine Arbeitsöffnung 5 in der Gehäusefrontseite 4 ermöglicht den Zugang zum Innenraum 3 und wird von einer höhenverstellbaren Frontscheibe 6 verschlossen. Die Sicherheitswerkbank 1 entspricht grundsätzlich einer herkömmlichen Sicherheitswerkbank, wie sie beispielsweise in der DE 4441784 C2 beschrieben wird und weist ein Lüftungssystem auf, welches ebenfalls grundsätzlich dem Stand der Technik entspricht. Die Art der Bedienung unterscheidet sich jedoch bei der erfindungsgemäßen Sicherheitswerkbank von derjenigen herkömmlicher Werkbänke. Die Bedienung der Sicherheitswerkbank erfolgt hauptsächlich mittels einer Fernbedienungseinheit 8, welche nicht mit der Sicherheitswerkbank räumlich verbunden ist. Die Fernbedienungseinheit 8 erlaubt das Ansteuern aller Gerätefunktionen, wie beispielsweise das Ein- und Ausschalten der Werkbank, die Regulierung des Lüftungssystem, das Ein- und Ausschalten der Beleuchtung, das Heben und Absenken der Frontscheibe 6, das Zuund Abschalten der in das Gerät integrierten Steckdosen, das Ansteuern des in die Gehäuserückwand 11 integrierten Anzeigeelements 10, die Desinfektion der Werkbank, das Programmieren eines Timers, das Freigeben oder Sperren von Kontakten, die Einstellung von Geräteparametern oder die Änderung oder Vornahme von Serviceeinstellungen usw..In detail shows FIG. 1 an inventive safety cabinet 1 with an interior 3, which is enclosed by a housing 2. A work opening 5 in the housing front side 4 allows access to the interior 3 and is closed by a height-adjustable windshield 6. The safety cabinet 1 basically corresponds to a conventional safety workbench, as for example in the DE 4441784 C2 is described and has a ventilation system, which also basically corresponds to the prior art. However, the type of operation differs in the safety workbench invention from that of conventional workbenches. The operation of the safety cabinet is mainly by means of a remote control unit 8, which is not spatially connected to the safety cabinet. The remote control unit 8 allows the control of all device functions, such as switching on and off the workbench, the regulation of the ventilation system, the switching on and off of the lighting, the raising and lowering of the windshield 6, the switching on and off of the integrated into the device sockets, controlling the integrated into the rear wall 11 display element 10, the disinfection of the workbench, the programming of a timer, the release or Locking contacts, setting device parameters or changing or making service settings, etc.

Hierzu sind in der Fernbedienungseinheit 8 verschiedene Tasten vorgesehen, mit denen die einzelnen Gerätefunktionen ausgelöst werden können. Dies ist beispielhaft anhand der in Fig. 2 dargestellten Fernbedienungseinheit wiedergegeben. Auf der linken Seite der Fernbedienungseinheit 8 sind sechs Tasten übereinander angeordnet, mit denen einzelne Gerätefunktionen angesteuert werden können. Die oberste der Tasten beispielsweise dient dem Aufruf des Timers, die zweitoberste zum Ein- und Abschalten der Gerätebeleuchtung usw.. Mit den beiden oberen Tasten im rechten Bereich der Fernbedienungseinheit 8 können einzelne Menüpunkte im Bedienungsmenü der Sicherheitswerkbank aufgerufen werden. Der jeweils aufgerufene Menüpunkt des Bedienungsmenüs wird dem Benutzer mittels des Anzeigeelements 10 angezeigt, welches in die Geräterückwand 11 der Sicherheitswerkbank 1 integriert ist.For this purpose, 8 different buttons are provided in the remote control unit, with which the individual device functions can be triggered. This is exemplified by the in Fig. 2 reproduced remote control unit shown. On the left side of the remote control unit 8 six keys are arranged one above the other, with which individual device functions can be controlled. The top of the buttons, for example, is used to call the timer, the second-highest to turn on and off the device lighting, etc. With the two upper buttons in the right area of the remote control unit 8 individual menu items in the operating menu of the safety cabinet can be accessed. The respectively called menu item of the operating menu is displayed to the user by means of the display element 10, which is integrated into the rear wall 11 of the safety cabinet 1.

Das Gehäuse 12 des Anzeigeelements 10 steht geringfügig in den Innenraum 3 der Sicherheitswerkbank 1 vor. Um die Strömungsverhältnisse innerhalb des Innenraums 3 möglichst wenig zu stören, ist das Gehäuse 12 strömungsoptimiert. Dazu sind die seitlichen Randbereiche 13 des Gehäuses 12 angeschrägt, so dass das Gehäuse von den äußeren Rändern her nach innen allmählich in seiner Höhe ansteigt.The housing 12 of the display element 10 projects slightly into the interior 3 of the safety workbench 1. In order to disturb the flow conditions within the interior 3 as little as possible, the housing 12 is flow-optimized. For this purpose, the lateral edge portions 13 of the housing 12 are chamfered, so that the housing gradually increases in height from the outer edges inwardly.

Das Anzeigeelement 10 ist in Fig. 3 näher dargestellt. Es ist lediglich der Anzeigebereich dargestellt, während das einfassende seitliche Gehäuse weggelassen ist. Das Anzeigeelement 10 besitzt im oberen Bereich ein Display 13 zur Wiedergabe eines Menütextes oder einer sonstigen Meldung, zum Beispiel einer Fehlermeldung. Außerdem sind verschiedene Leuchtdioden 14 vorhanden, denen der Benutzer der Sicherheitswerkbank den Betriebszustand und die aktuelle Menüebene des Bedienungsmenüs entnehmen kann, in welcher er sich gerade befindet. In das Anzeigeelement 10 ist zudem der Empfänger 9 zum Empfang der Steuersignale von der Fernbedienungseinheit 8 integriert. Der Empfänger ist hier nur schematisch dargestellt.The display element 10 is in Fig. 3 shown in more detail. Only the display area is shown while the enclosing side housing is omitted. The display element 10 has in the upper part of a display 13 for reproducing a menu text or other message, for example an error message. In addition, various light-emitting diodes 14 are present, to which the user of the safety workbench can read the operating state and the current menu level of the operating menu in which he is currently located. In addition, the receiver 9 for receiving the control signals from the remote control unit 8 is integrated into the display element 10. The receiver is shown here only schematically.

Konkret handelt es sich bei dem Empfänger zum Beispiel um einen solchen mit einer Modulationsfrequenz von 38 kHz (beispielsweise IC SFH5110-38 der Osram GmbH). Die bursts bestehen jeweils aus sechs Impulsen mit 13 µs Dauer, sodass ein burst 156 µs lang ist. Die Sendeinformation wird über den Abstand der bursts codiert. Es gibt zwei Abstände, nämlich lang (1,792 ms, entsprechend logischer 0) und kurz (1,280 ms, entsprechend logischer 1). Die Zeiten sind jeweils vom Beginn eines bursts bis zum Beginn des nächsten burst gemessen. Ein vollständiges Sendemuster besteht aus insgesamt 17 bits, einem Start- und zweimal acht Informationsbits. Die ersten acht Bit repräsentieren den Code, die zweiten acht Bit wiederholen den Code als Komplement. Damit beträgt die Gesamtdauer immer 24,576 ms. Der Code besteht aus vier Bit für die Senderkennung und vier Bit für die Tastenkennung. Um unbeabsichtigte Fehlbedienungen zu vermeiden, wird kein Signal gesendet, wenn innerhalb von 50 ms gleichzeitig mehrere Tasten gedrückt werden.Specifically, the receiver is, for example, one with a modulation frequency of 38 kHz (for example, IC SFH5110-38 from Osram GmbH). The bursts each consist of six pulses with a duration of 13 μs, so that a burst is 156 μs long. The transmission information is coded by the spacing of the bursts. There are two distances, namely long (1.792 ms, corresponding to logical 0) and short (1.280 ms, corresponding to logical 1). The times are each measured from the beginning of a burst to the beginning of the next burst. A complete transmit pattern consists of a total of 17 bits, one start and two eight information bits. The first eight bits represent the code, the second eight bits repeat the code as a complement. Thus, the total duration is always 24.576 ms. The code consists of four bits for the station identification and four bits for the button identification. In order to avoid unintentional operating errors, no signal is sent if several keys are pressed simultaneously within 50 ms.

Zusätzlich zur Fernbedienungseinheit 8 weist die erfindungsgemäße Sicherheitswerkbank 1 ein in die Werkbank integriertes Bedienelement 7 auf. Dieses ist hier nur schematisch dargestellt, kann aber grundsätzlich den Bedienelementen des Standes der Technik entsprechen. Erfindungsgemäß dient das integrierte Bedienelement 7 hauptsächlich als Sicherheits- oder Notschaltung, beispielsweise für den Fall, dass die Fernbedienungseinheit 8 verlegt wurde oder eine Funktionsstörung aufweist. Die Bedieneinheit 7 ist daher auf die Steuerung der Gerätegrundfunktionen reduziert. Dies sind beispielsweise das Ein- und Ausschalten der Werkbank, das Einschalten der Lüftung oder Beleuchtung oder der Versorgungsspannung für die integrierten Steckdosen. Außerdem kann mit der integrierten Bedieneinheit 7 die Frontscheibe 6 auf und ab bewegt werden. Zweckmäßig lässt sich mit der Bedieneinheit 7 außerdem ein Alarmsignal quittieren, welches bei einer Fehlfunktion der Sicherheitswerkbank 1 ausgelöst wird. Mit der Bedieneinheit 7 gegebene Befehle haben Vorrang vor denjenigen, welche mit der Fernbedienungseinheit 8 gegeben wurden. Auf diese Weise ist sichergestellt, dass die Sicherheitswerkbank 1 bei einer Funktionsstörung der Fernbedienungseinheit 8 von der integrierten Bedieneinheit 7 aus bedient werden kann.In addition to the remote control unit 8, the safety workbench 1 according to the invention has an operating element 7 integrated in the workbench. This is shown here only schematically, but in principle can correspond to the controls of the prior art. According to the invention, the integrated control element 7 mainly serves as a safety or emergency circuit, for example in the event that the remote control unit 8 has been misplaced or has a malfunction. The operating unit 7 is therefore reduced to the control of basic device functions. These include switching on and off the workbench, switching on the ventilation or lighting or the supply voltage for the integrated sockets. In addition, the front screen 6 can be moved up and down with the integrated operating unit 7. Expediently, an alarm signal can also be acknowledged with the operating unit 7, which is triggered in the event of a malfunction of the safety workbench 1. Commands given to the operating unit 7 take precedence over those given to the remote control unit 8. In this way, it is ensured that the safety workbench 1 can be operated by the integrated operating unit 7 in the event of a malfunction of the remote control unit 8.

Claims (14)

  1. Safety cabinet (1) with an interior (3) enclosed by a housing (2) and with a housing front side (4) comprising an aperture (5) that can be closed with a vertically adjustable front pane (6), as well as with a control unit (7) for controlling device functions that is integrated in the housing (2), characterized in that the safety cabinet (1) comprises a spatially separate remote control unit (8) for the optional control of device functions, said remote control unit (8) being insertable into/removable from the interior (3), and a receiver (9) for receiving wireless control signals emitted by the remote control unit (8) is integrated in the safety cabinet (1),
  2. Safety cabinet according to claim 1, characterized in that the remote control unit (8) is an infrared remote control unit which preferably emits control signals with a modulation frequency of 34-42 kHz and in particular 38 kHz, and the receiver (9) is adapted to receive these control signals.
  3. Safety cabinet according to claim 1 or 2, characterized in that at least one of the following device functions can be controlled by the remote control unit (8):
    - turning the safety cabinet on and off
    - switching power outlets integrated in the safety cabinet
    - turning the device lights on and off
    - moving the adjustable front pane
    - turning a disinfection unit on
    - releasing a contact in the secure operation of the safety cabinet
    - setting a timer
    - selecting display settings
    - setting device parameters and service settings.
  4. Safety cabinet according to one of claims 1-3, characterized in that the control unit (7) integrated in the housing (2) is only suitable for controlling basic device functions, in particular for
    - turning the safety cabinet on and off
    - turning the ventilation on
    - turning the lights on
    - turning on the supply voltage for the integrated power outlets
    - moving the vertically adjustable front pane
    - acknowledging an alarm signal.
  5. Safety cabinet according to one of claims 1-4, characterized in that a predetermined duration of application of the remote control unit (8) or control unit (7) is required to start or terminate a device function.
  6. Safety cabinet according to one of claims 1-5, characterized in that the remote control unit (8) and/or control unit (7) are adapted so that no control signal is emitted in the event that several buttons or switches are pressed simultaneously or essentially simultaneously.
  7. Safety cabinet according to one of claims 1-6, characterized in that control signals emitted by the control unit (7) have a higher priority than control signals emitted by the remote control unit (8).
  8. Safety cabinet according to one of claims 1-7, characterized in that a display element (10) that displays a control menu and/or the current operating status of the safety cabinet (1) is provided in the area of the housing (2).
  9. Safety cabinet according to claim 8, characterized in that the display element (10) is arranged in the interior (3) of the safety cabinet (1), preferably in the housing's rear wall (11).
  10. Safety cabinet according to claim 8 or 9, characterized in that the display element (10) fits flush with a housing wall or comprises a streamlined housing protruding into the interior (3), in particular a housing (12) with slanted side areas (13).
  11. Safety cabinet according to one of claims 8 -10, characterized in that the receiver (9) is integrated in the display element (10).
  12. Safety cabinet according to one of claims 1-11, characterized in that the remote control unit (8) is enclosed by a removable protective sleeve.
  13. Safety cabinet according to one of claims 1-12, characterized in that a remote control unit for use in the interior (3) as well as a remote control unit for use outside of the interior (3) are provided, and the remote control units preferably differ from one another visually.
  14. Safety cabinet according to one of claims 1-13, characterized in that a rest for the at least one remote control unit is provided in the interior (3) and/or on the housing's exterior.
EP03006582A 2002-04-17 2003-03-24 Remotely controllable safety workbench Expired - Lifetime EP1354643B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10217100A DE10217100B4 (en) 2002-04-17 2002-04-17 Remote-operated safety cabinet
DE10217100 2002-04-17

Publications (3)

Publication Number Publication Date
EP1354643A2 EP1354643A2 (en) 2003-10-22
EP1354643A3 EP1354643A3 (en) 2006-04-12
EP1354643B1 true EP1354643B1 (en) 2010-04-28

Family

ID=28458893

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Application Number Title Priority Date Filing Date
EP03006582A Expired - Lifetime EP1354643B1 (en) 2002-04-17 2003-03-24 Remotely controllable safety workbench

Country Status (4)

Country Link
US (1) US7053364B2 (en)
EP (1) EP1354643B1 (en)
DE (2) DE10217100B4 (en)
HK (1) HK1061994A1 (en)

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Also Published As

Publication number Publication date
DE10217100B4 (en) 2007-07-19
EP1354643A3 (en) 2006-04-12
HK1061994A1 (en) 2004-10-15
DE50312650D1 (en) 2010-06-10
EP1354643A2 (en) 2003-10-22
US20030227238A1 (en) 2003-12-11
DE10217100A1 (en) 2003-11-13
US7053364B2 (en) 2006-05-30

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