EP1312871B1 - Safety workbench - Google Patents

Safety workbench Download PDF

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Publication number
EP1312871B1
EP1312871B1 EP02023245A EP02023245A EP1312871B1 EP 1312871 B1 EP1312871 B1 EP 1312871B1 EP 02023245 A EP02023245 A EP 02023245A EP 02023245 A EP02023245 A EP 02023245A EP 1312871 B1 EP1312871 B1 EP 1312871B1
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EP
European Patent Office
Prior art keywords
filter
housing
safety workbench
workbench according
air
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
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EP02023245A
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German (de)
French (fr)
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EP1312871A1 (en
Inventor
Jürgen Eckert
Thomas Hinrichs
Sven Gragert
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Berner International GmbH
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Berner International GmbH
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Publication of EP1312871A1 publication Critical patent/EP1312871A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
    • B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
    • B08B15/023—Fume cabinets or cupboards, e.g. for laboratories
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/16—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by purification, e.g. by filtering; by sterilisation; by ozonisation
    • F24F3/163—Clean air work stations, i.e. selected areas within a space which filtered air is passed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2215/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
    • B08B2215/003—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area with the assistance of blowing nozzles

Definitions

  • the invention relates to safety workbenches, in particular to cytostatic workbenches (primarily for the extent with CMR (carcinogenic, mutagenic, reprotoxic) drug of type V ( ⁇ preparation for application) or H ( ⁇ production) or microbiological safety cabinets (primarily for the Handling biological agents (Classes I, II and III).
  • cytostatic workbenches primarily for the extent with CMR (carcinogenic, mutagenic, reprotoxic) drug of type V ( ⁇ preparation for application) or H ( ⁇ production) or microbiological safety cabinets (primarily for the Handling biological agents (Classes I, II and III).
  • Safety workbenches serve to carry out work with biological, chemical and other agents in the laboratory under the protection of laboratory personnel and the environment from contaminants contained in or contained in the samples could be.
  • Safety cabinets have a work surface created by a box accessible from the front is enclosed. The goal is the physical one Separation of the working area from the laboratory space, to this first and the staff to protect against contamination.
  • For class I safety workbenches this by a pointing away from the front of the experimenter air flow, the is passed through a filter before leaving the work space.
  • In safety workbenches Class II additionally introduces contamination avoided in the working space by placing in the box a low-turbulence displacement airflow is produced.
  • a steady filtered airflow comes from above or laterally, is evenly distributed over the cross section of the box and with same speed sucked off again, together with a flow of air, the through the work opening from the front into the box. Usually a filtered partial air flow returned. A filtered exhaust air flow goes to the Surroundings.
  • the air currents are generated by a blower, which in the Safety workbench is integrated.
  • Class III safety workbenches are full-sided closed and provided with firmly inserted gloves for manipulation. They are under negative pressure.
  • Cytostatic workbenches work accordingly, but are specific to one prepared low-contamination filter change. For this they have particular a group of single filter elements that are simpler than a large contiguous one Filter are available.
  • wedge filters In known safety workbenches are for filtering the working air from the work space wedge filters are used, which are in a series arrangement below the work surface are located.
  • the wedge filters have two substantially planar filter packs, which consists of pleated cellulose or glass fiber paper. Two such Filter packets are held in a V-shaped arrangement in a plastic housing.
  • the wedge filter has an opening at the end where the filter packs are furthest Have distance from each other.
  • wedge filters are in a vertical or slightly oblique orientation next to each other arranged below the work surface, with working room air in the openings the wedge filter is introduced and as clean air from the outside of the Filter packets emerges.
  • the invention is based on the object, with respect to the Cleaning the working room air and ergonomically improved safety workbench to provide.
  • the task is performed by a safety workbench with the features of the claim 1 solved.
  • Advantageous embodiments of the safety workbench are in the Subclaims specified.
  • the cartridge filters have a clear compared to the conventional wedge filters improved freedom from leaks (especially due to reduced or better sealing own sealing areas) and a significantly improved sealing seat on Casing.
  • the cartridge filters are covered with significantly more filter surface executable on the volume of construction, as a wedge filter. This makes it possible, about the same Filter surface as in wedge filters in a reduced volume accommodate. As a result, the free space below the work surface, which the experimenter for pushes the legs and feet, much less restricted. Especially it is possible to carry out the filter cartridges with so low height that below the filter cartridges provided a footwell for the experimenter becomes. An increase in the dimensions of the safety cabinet is this not mandatory. As a result, the safety workbench according to the invention compared to the state of the art in terms of filter technology and ergonomics significantly improved.
  • the cylindrical filter body is complete and im essential of filter material.
  • This is preferably a folded or pleated Material that has the overall shape of a cylinder.
  • the cylinder is a circular cylinder.
  • the filter material by at least one longitudinal, sealing connection to a Cylinder closed. The connection can be made, for example, by an adhesive be formed or by a cured casting material.
  • the filter body is the end by means of an adhesive and / or a cured casting material sealingly fixed to the covers.
  • the filter body is in the end in grooves of the Lid inserted.
  • it is glued or cast in it.
  • the open lid is between the housing and the open lid one each Arranged sealing ring.
  • the open lid a molded sealing ring made of foam.
  • the cartridge filter by means of an attacking from the outside Clamping device with the edge of its open lid sealing against the Housing pressed.
  • Other fasteners and seals are included.
  • the open lid has a laterally projecting Edge flange for sealing and / or attachment in the housing.
  • the sealing ring between the edge flange and Housing arranged and / or has the edge flange mounting holes for fittings with the case on.
  • the cartridge filters are arranged below the work surface to remove contaminants filter out by the shortest route. According to one embodiment, it is the turn Cartridge filter under the edge of the work surface opposite the work opening arranged to allow the experimenter as much legroom as possible.
  • a gap below the work surface Preferably limits the area against which the filter cartridges sealed are the gap below.
  • the filter cartridges are in a below the Worktop arranged arranged filter housing. Between filter housing and Filter cartridges, the air can be continuously withdrawn from the fan.
  • the filter housing ends at a distance above the bottom, so that between the filter housing and the bottom of a legroom for the experimenter is present.
  • the housing laterally has two feet, between where the work surface and the filter housing and the entire upper part arranged are.
  • the experiment also does not interfere with the feet while working.
  • a preferred C-shape of the feet allows the experimenter, even in to engage the foot area.
  • the safety cabinet has a housing 1, which comprises two side parts 2, 3, the have feet 4, 5 below.
  • a box 6 of the Housing 1 in which a working space 7 is located.
  • the working space 7 is below limited by a work surface 8 and is from the front through a working opening. 9 accessible, which is located directly above the work surface 8.
  • the work opening 9 has the shape of a narrow rectangle that extends horizontally along the entire work surface 8 extends.
  • a gap 10th This is connected by an air outlet 11 with the working space 7 through a plurality of openings in the work surface 8, preferably at the front and rear edge, but are also in the middle area could, is formed.
  • the filter bodies 16 are each formed by a pleated filter material, the closed along a longitudinal bond to a cylinder.
  • the filter body 16 are potted at the top with a lid 17 having an opening 18, whose Cross section corresponds to the inner cross section of the filter body 16.
  • the lid 17 have a laterally projecting edge flange 19.
  • the edge flange 19 is located on the Top of the housing surface 13 and is with this not shown screws screwed. Between the edge flange 19 and the housing surface 13 is located a not shown sealing ring made of foam, which is attached to the underside of the edge flange 19 is injected. As a result, the cartridge filter 15 sealing in Housing 1 held.
  • the intermediate space 10 is below through a further housing surface 21 sealed, which runs parallel to the work surface 8.
  • the filter housing 12 has a short horizontal top Housing surface 22 for sealing against the gap 10th
  • Rear are the working space 7 and the gap 10 through a rear wall 23rd limited. Between this and a housing rear wall 24 is a return flow channel 25 present in the upper region 26 of the housing 1 above the working space 7 leads.
  • the return flow channel 25 opens into a fan chamber 27.
  • the blower 28 When operating the safety cabinet, the blower 28 generates an input side Vacuum, which causes working space air from the working space 7 and Ambient air from the working opening 9 through the air outlet 11 into the intermediate space 10, from there through the cartridge filter 15 filtering through the return flow 25th is deducted. As a result, filtered air, which flows into the return flow channel 25 is free from contamination.
  • the exhaust filter 29 and the recirculating air filter 30 behind the Blowers 28 are provided to the in the event of failure of the cartridge filter 15 the required filtering of working air and ambient air (together also To cause "mixed air").
  • the experimenter sits in front of the work opening 9, taking his legs and feet comfortably under the working surface 8 and the filter housing 12 can arrange.
  • the work surface 8 can easily replace the cartridge filter 15 be removed or opened.

Abstract

A safety work bench comprises a housing (11) with a box-shaped work area (7), a work surface (8) and an air outlet. A row of cartridge filters (15) is located under the work surface, and have an open lid at one end of a cylindrical filter body, and a closed lid at the other. The open end has a seal, and a blower (28) is connected to the other side of the filter body.

Description

Die Erfindung bezieht sich auf Sicherheitswerkbänke, insbesondere auf Zytostatika-Werkbänke (primär für den Umfang mit CMR (cancerogen, mutagen, reproduktionstoxisch)-Arzneimittel der Typen V (≙ Vorbereitung zur Anwendung) bzw. H (≙ Herstellung) bzw. mikrobiologische Sicherheitswerkbänke (primär für den Umgang mit biologischen Agentien (der Klassen I, II und III).The invention relates to safety workbenches, in particular to cytostatic workbenches (primarily for the extent with CMR (carcinogenic, mutagenic, reprotoxic) drug of type V (≙ preparation for application) or H (≙ production) or microbiological safety cabinets (primarily for the Handling biological agents (Classes I, II and III).

Sicherheitswerkbänke (wie z.B.im Dokument JP-03066574-A gezeigt) dienen der Durchführung von Arbeiten mit biologischen, chemischen und sonstigen Agentien im Labor unter Schutz des Laborpersonals und der Umwelt vor Kontaminationen, die in den Proben enthalten sind oder darin enthalten sein können. Sicherheitswerkbänke weisen eine Arbeitsfläche auf, die von einem von vorne zugänglichen Kasten umschlossen ist. Ziel ist die physikalische Trennung der Arbeitsfläche vom Laborraum, um zunächst diesen und das Personal vor Kontaminationen zu schützen. Bei Sicherheitswerkbänken der Klasse I geschieht dies durch eine an der Front vom Experimentator weggerichtete Luftströmung, die vor dem Verlassen des Arbeitsraumes durch einen Filter geleitet wird. In Sicherheitswerkbänken der Klasse II, wird zusätzlich ein Eindringen von Kontaminationen in den Arbeitsraum vermieden, indem im Kasten eine turbulenzarme Verdrängungs-Luftströmung erzeugt wird. Dazu tritt ein stetiger gefilterter Luftstrom von oben oder seitlich ein, wird gleichmäßig über den Querschnitt des Kastens verteilt und mit gleicher Geschwindigkeit wieder abgesaugt, zusammen mit einem Luftstrom, der durch die Arbeitsöffnung von der Vorderseite in den Kasten eintritt. Zumeist wird ein gefilterter Teilluftstrom zurückgeführt. Ein gefilterter Abluftstrom geht an die Umgebung. Die Luftströmungen werden durch ein Gebläse erzeugt, das in die Sicherheitswerkbank integriert ist. Sicherheitswerkbänke der Klasse III sind ganzseitig geschlossen und mit fest eingesetzten Handschuhe zur Manipulation versehen. Sie stehen unter Unterdruck.Safety workbenches (such as shown in document JP-03066574-A) serve to carry out work with biological, chemical and other agents in the laboratory under the protection of laboratory personnel and the environment from contaminants contained in or contained in the samples could be. Safety cabinets have a work surface created by a box accessible from the front is enclosed. The goal is the physical one Separation of the working area from the laboratory space, to this first and the staff to protect against contamination. For class I safety workbenches this by a pointing away from the front of the experimenter air flow, the is passed through a filter before leaving the work space. In safety workbenches Class II, additionally introduces contamination avoided in the working space by placing in the box a low-turbulence displacement airflow is produced. In addition, a steady filtered airflow comes from above or laterally, is evenly distributed over the cross section of the box and with same speed sucked off again, together with a flow of air, the through the work opening from the front into the box. Mostly a filtered partial air flow returned. A filtered exhaust air flow goes to the Surroundings. The air currents are generated by a blower, which in the Safety workbench is integrated. Class III safety workbenches are full-sided closed and provided with firmly inserted gloves for manipulation. They are under negative pressure.

Zytostatika-Werkbänke funktionieren entsprechend, sind jedoch speziell für einen kontaminationsarmen Filterwechsel vorbereitet. Hierfür weisen sie insbesondere eine Gruppe aus Filter-Einzelelementen auf, die einfacher als ein großes zusammenhängendes Filter ansorgbar sind.Cytostatic workbenches work accordingly, but are specific to one prepared low-contamination filter change. For this they have particular a group of single filter elements that are simpler than a large contiguous one Filter are available.

Bei bekannten Sicherheitswerkbänken werden zur Filterung der Arbeitsraumluft aus dem Arbeitsraum Keilfilter eingesetzt, die sich in einer Reihenanordnung unterhalb der Arbeitsfläche befinden. Die Keilfilter haben zwei im wesentlichen plane Filterpakete, die aus plissiertem Zellulose- oder Glasfaserpapier besteht. Zwei solcher Filterpakete sind in V-förmiger Anordnung in einem Kunststoffgehäuse gehalten. Das Keilfilter hat eine Öffnung an dem Ende, an dem die Filterpakete den weitesten Abstand voneinander haben.In known safety workbenches are for filtering the working air from the work space wedge filters are used, which are in a series arrangement below the work surface are located. The wedge filters have two substantially planar filter packs, which consists of pleated cellulose or glass fiber paper. Two such Filter packets are held in a V-shaped arrangement in a plastic housing. The wedge filter has an opening at the end where the filter packs are furthest Have distance from each other.

Mehrere Keilfilter sind in senkrechter bzw. leicht schräger Ausrichtung nebeneinander unterhalb der Arbeitsfläche angeordnet, wobei Arbeitsraumluft in die Öffnungen der Keilfilter hineingeführt wird und als Reinluft aus den Außenseiten der Filterpakete austritt.Several wedge filters are in a vertical or slightly oblique orientation next to each other arranged below the work surface, with working room air in the openings the wedge filter is introduced and as clean air from the outside of the Filter packets emerges.

Bei diesen Sicherheitswerkbänken ist nachteilig, daß die Keilfilter und deren Sitz im Gehäuse erhebliche Undichtigkeiten aufweisen können, wodurch die Filterwirkung herabgesetzt wird.In these safety workbenches is disadvantageous that the wedge filter and its seat in Housing may have significant leaks, causing the filter effect is lowered.

Ferner ist bei den bekannten Sicherheitswerkbänken störend, daß die Keilfilter, die eine Höhe von ca. 600 mm und eine Tiefe von etwa 200 bis 300 mm haben, den Fußraum für den Experimentator begrenzen, der unterhalb der Arbeitsfläche vorhanden ist. Dies wirkt sich nachteilig auf die Leistungsfähigkeit der Experimentatoren aus.Furthermore, in the known safety workbenches disturbing that the wedge filter, the have a height of about 600 mm and a depth of about 200 to 300 mm, the Limit footwell for the experimenter who exists below the work surface is. This has a detrimental effect on the performance of the experimenters out.

Davon ausgehend liegt der Erfindung die Aufgabe zugrunde, eine hinsichtlich der Reinigung der Arbeitsraumluft und ergonomisch verbesserte Sicherheitswerkbank zur Verfügung zu stellen.On this basis, the invention is based on the object, with respect to the Cleaning the working room air and ergonomically improved safety workbench to provide.

Die Aufgabe wird durch eine Sicherheitswerkbank mit den Merkmalen des Anspruches 1 gelöst. Vorteilhafte Ausgestaltungen der Sicherheitswerkbank sind in den Unteransprüchen angegeben.The task is performed by a safety workbench with the features of the claim 1 solved. Advantageous embodiments of the safety workbench are in the Subclaims specified.

Die erfindungsgemäße Sicherheitswerkbank hat

  • ein Gehäuse mit einem Arbeitsraum, der unten eine Arbeitsfläche und einen Luftaustritt für Arbeitsraumluft und an der Vorderseite eine Arbeitsöffnung für einen Eingriff in den Arbeitsraum und das Einströmen von Umgebungsluft aufweist,
  • eine unterhalb der Arbeitsfläche angeordnete Reihe Patronenfilter, die an einem Ende eines zylindrischen Filterkörpers einen offenen Deckel und an dem anderen Ende des Filterkörpers einen geschlossenen Deckel aufweisen, an dem offenen Deckel einen Dichtsitz im Gehäuse haben und auf der einen Seite des Filterkörpers pneumatisch mit dem Luftaustritt verbunden sind und
  • einem Gebläse, das eingangsseitig pneumatisch mit der anderen Seite der Filterkörper verbunden ist, um Arbeitsraumluft und/oder Umgebungsluft durch den Luftaustritt abzuziehen und in den Patronenfiltern zu filtern, und das ausgangsseitig mit Umgebung und wahlweise einem Lufteintritt des Arbeitsraumes oberhalb der Arbeitsfläche verbunden ist, um die gefilterte Luft zumindest teilweise an die Umgebung abzugeben unter Ausgleich der abgegebenen Luft durch Einströmung von Umgebungsluft durch die Arbeitsöffnung und wahlweise gefilterte Luft in den Arbeitsraum zu fördern.
The safety workbench according to the invention has
  • a housing with a working space having at the bottom a work surface and an air outlet for workspace air and at the front a work opening for engagement in the work space and the inflow of ambient air,
  • a row of cartridge filters disposed below the work surface having an open lid at one end of a cylindrical filter body and a closed lid at the other end of the filter body, having a sealing seat in the housing on the open lid, and pneumatic on one side of the filter body with the air outlet are connected and
  • a fan, the input side pneumatically connected to the other side of the filter body to extract working air and / or ambient air through the air outlet and to filter in the cartridge filters, and the output side is connected to the environment and optionally an air inlet of the working space above the work surface to at least partially deliver the filtered air to the environment, while balancing the discharged air with the inflow of ambient air through the work opening and selectively conveying filtered air into the working space.

Die Patronenfilter haben im Vergleich mit den herkömmlichen Keilfiltern eine deutlich verbesserte Leckagefreiheit (insbesondere aufgrund reduzierter bzw. besser abdichtender eigener Dichtbereiche) und einen deutlich verbesserten Dichtsitz am Gehäuse. Außerdem sind die Patronenfilter mit erheblich mehr Filterfläche bezogen auf das Bauvolumen ausführbar, als Keilfilter. Hierdurch ist es möglich, etwa dieselbe Filterfläche wie bei Keilfiltern in einem reduzierten Volumen unterzubringen. Hierdurch ist der Freiraum unterhalb der Arbeitsfläche, den der Experimentator für das Unterschieben der Beine und Füße nutzt, viel weniger eingeschränkt. Insbesondere ist es möglich, die Filterpatronen mit so geringer Höhe auszuführen, daß unterhalb der Filterpatronen ein Fußraum für den Experimentator zur Verfügung gestellt wird. Eine Vergrößerung der Abmessungen der Sicherheitswerkbank ist hierfür nicht erforderlich. Infolgedessen ist die erfindungsgemäße Sicherheitswerkbank gegenüber dem Stand der Technik in filtertechnischer und ergonomischer Hinsicht erheblich verbessert.The cartridge filters have a clear compared to the conventional wedge filters improved freedom from leaks (especially due to reduced or better sealing own sealing areas) and a significantly improved sealing seat on Casing. In addition, the cartridge filters are covered with significantly more filter surface executable on the volume of construction, as a wedge filter. This makes it possible, about the same Filter surface as in wedge filters in a reduced volume accommodate. As a result, the free space below the work surface, which the experimenter for pushes the legs and feet, much less restricted. Especially it is possible to carry out the filter cartridges with so low height that below the filter cartridges provided a footwell for the experimenter becomes. An increase in the dimensions of the safety cabinet is this not mandatory. As a result, the safety workbench according to the invention compared to the state of the art in terms of filter technology and ergonomics significantly improved.

Gemäß einer Ausgestaltung besteht der zylindrische Filterkörper vollständig und im wesentlichen aus Filtermaterial. Dieses ist vorzugsweise ein gefaltetes bzw. plissiertes Material, das insgesamt die Form eines Zylinders aufweist. Vorzugsweise ist der Zylinder ein Kreiszylinder. Grundsätzlich ist es möglich, das Filtermaterial nahtlos zu einem Zylinder zu formen. Gemäß einer Ausgestaltung ist das Filtermaterial durch mindestens eine längsgerichtete, abdichtende Verbindung zu einem Zylinder geschlossen. Die Verbindung kann beispielsweise durch einen Klebstoff gebildet sein oder durch ein ausgehärtetes Gießmaterial. According to one embodiment, the cylindrical filter body is complete and im essential of filter material. This is preferably a folded or pleated Material that has the overall shape of a cylinder. Preferably the cylinder is a circular cylinder. In principle, it is possible to use the filter material seamless to form a cylinder. According to one embodiment, the filter material by at least one longitudinal, sealing connection to a Cylinder closed. The connection can be made, for example, by an adhesive be formed or by a cured casting material.

Gemäß einer Ausgestaltung ist der Filterkörper endseitig mittels eines Klebstoffes und/oder eines ausgehärteten Gießmaterials abdichtend an den Deckeln fixiert. Gemäß einer weiteren Ausgestaltung ist der Filterkörper endseitig in Nuten der Deckel eingesetzt. Vorteilhafterweise ist er darin eingeklebt oder eingegossen.According to one embodiment, the filter body is the end by means of an adhesive and / or a cured casting material sealingly fixed to the covers. According to a further embodiment, the filter body is in the end in grooves of the Lid inserted. Advantageously, it is glued or cast in it.

Gemäß einer Ausgestaltung ist zwischen Gehäuse und offenem Deckel jeweils ein Dichtring angeordnet. Gemäß einer weiteren Ausgestaltung hat der offene Deckel einen angespritzten Dichtring aus Schaumstoff.According to one embodiment is between the housing and the open lid one each Arranged sealing ring. According to a further embodiment, the open lid a molded sealing ring made of foam.

Grundsätzlich können die Patronenfilter mittels einer von außen angreifenden Klemmvorrichtung mit dem Rand ihres offenen Deckels abdichtend gegen das Gehäuse gedrückt sein. Auch andere Befestigungen und Abdichtungen sind einbezogen. Gemäß einer Ausgestaltung weist der offene Deckel einen seitlich überstehenden Randflansch zur Abdichtung und/oder Befestigung im Gehäuse auf. Gemäß einer weiteren Ausgestaltung ist der Dichtring zwischen Randflansch und Gehäuse angeordnet und/oder weist der Randflansch Befestigungslöcher für Verschraubungen mit dem Gehäuse auf.Basically, the cartridge filter by means of an attacking from the outside Clamping device with the edge of its open lid sealing against the Housing pressed. Other fasteners and seals are included. According to one embodiment, the open lid has a laterally projecting Edge flange for sealing and / or attachment in the housing. According to a further embodiment, the sealing ring between the edge flange and Housing arranged and / or has the edge flange mounting holes for fittings with the case on.

Die Patronenfilter sind unterhalb der Arbeitsfläche angeordnet, um Kontaminationen auf dem kürzesten Wege abzufiltern. Gemäß einer Ausgestaltung ist die Reihe Patronenfilter unter dem Rand der Arbeitsfläche gegenüber der Arbeitsöffnung angeordnet, um dem Experimentator möglichst viel Beinfreiheit zu ermöglichen.The cartridge filters are arranged below the work surface to remove contaminants filter out by the shortest route. According to one embodiment, it is the turn Cartridge filter under the edge of the work surface opposite the work opening arranged to allow the experimenter as much legroom as possible.

Aus demselben Grunde sind gemäß einer Ausgestaltung die Achsen der Filterpatronen zur Vertikalen geneigt, wobei der obere Deckel einen geringeren seitlichen Abstand von der Arbeitsöffnung als der untere Deckel aufweist. Gemäß einer weiteren Ausgestaltung sind die Patronenfilter gegenüber einer zur Horizontalten geneigten Fläche des Gehäuses abgedichtet, um die Patronenfilter schräg zur Vertikalen auszurichten.For the same reason, according to one embodiment, the axes of the filter cartridges tilted to the vertical, the upper lid a smaller lateral Distance from the working opening than the lower lid. According to another Embodiment are the cartridge filter with respect to a horizontal inclined Surface of the housing sealed to the cartridge filter obliquely to the vertical align.

Gemäß einer Ausgestaltung sind die offenen Deckel oben angeordnet und gegenüber dem Gehäuse abgedichtet, so daß die Arbeitsraumluft und/oder Umgebungsluft durch die Deckelöffnungen in die Filterpatronen eintritt und auf der Außenseite der Filterkörper von dem Gebläse abgezogen wird.According to one embodiment, the open lids are arranged above and opposite the housing sealed so that the working space air and / or ambient air through the lid openings in the filter cartridges enters and on the outside of the Filter body is removed from the fan.

Gemäß einer Ausgestaltung ist unterhalb der Arbeitsfläche ein Zwischenraum vorhanden, der mit dem Luftaustritt und der einen Seite der Filterpatronen verbunden ist. Vorzugsweise begrenzt die Fläche, gegenüber der die Filterpatronen abgedichtet sind, den Zwischenraum unten.According to one embodiment, there is a gap below the work surface, connected to the air outlet and one side of the filter cartridges is. Preferably limits the area against which the filter cartridges sealed are the gap below.

Gemäß einer weiteren Ausgestaltung sind die Filterpatronen in einem unterhalb der Arbeitsfläche angeordneten Filtergehäuse angeordnet. Zwischen Filtergehäuse und Filterpatronen kann die Luft kontinuierlich vom Gebläse abgezogen werden.According to a further embodiment, the filter cartridges are in a below the Worktop arranged arranged filter housing. Between filter housing and Filter cartridges, the air can be continuously withdrawn from the fan.

Gemäß einer weiteren Ausgestaltung hat das Filtergehäuse einen im wesentlichen keilförmigen Querschnitt, um einen besonders großen Beinraum bereitzustellen.According to a further embodiment, the filter housing has a substantially wedge-shaped cross-section to provide a particularly large legroom.

Gemäß einer weiteren Ausgestaltung endet das Filtergehäuse in einem Abstand oberhalb des Bodens, so daß zwischen Filtergehäuse und Boden ein Beinraum für den Experimentator vorhanden ist.According to a further embodiment, the filter housing ends at a distance above the bottom, so that between the filter housing and the bottom of a legroom for the experimenter is present.

Gemäß einer Ausgestaltung weist das Gehäuse seitlich zwei Füße auf, zwischen denen die Arbeitsfläche und das Filtergehäuse und das gesamte Oberteil angeordnet sind. Durch die Füße wird der Experimentator bei der Arbeit ebenfalls nicht behindert. Eine bevorzugte C-Form der Füße ermöglicht es dem Experimentator, sogar in den Fußbereich einzurücken.According to one embodiment, the housing laterally has two feet, between where the work surface and the filter housing and the entire upper part arranged are. The experiment also does not interfere with the feet while working. A preferred C-shape of the feet allows the experimenter, even in to engage the foot area.

Die Erfindung wird nachfolgend anhand der anliegenden Zeichnungen eines Ausführungsbeispieles näher erläutert. In den Zeichnungen zeigen:

Fig. 1
eine Sicherheitswerkbank in einem grobschematischen Vertikalschnitt;
Fig. 2
Gehäuse derselben Sicherheitswerkbank mit Patronenfiltern in einer perspektivischen Seitenansicht;
Fig. 3
Filtergehäuse mit Patronenfiltern derselben Sicherheitswerkbank in einer vergrößerten perspektivischen Seitenansicht;
Fig. 4
Filtergehäuse im Betrieb in einer vergrößerten Schnittdarstellung mit Durchströmung veranschaulichenden Pfeilen.
The invention will be explained in more detail with reference to the accompanying drawings of an embodiment. In the drawings show:
Fig. 1
a safety cabinet in a rough schematic vertical section;
Fig. 2
Housing the same safety cabinet with cartridge filters in a perspective side view;
Fig. 3
Filter housing with cartridge filters the same safety cabinet in an enlarged perspective side view;
Fig. 4
Filter housing in operation in an enlarged sectional view with flow illustrative arrows.

Die Sicherheitswerkbank hat ein Gehäuse 1, das zwei Seitenteile 2, 3 umfaßt, die unten Füße 4, 5 haben.The safety cabinet has a housing 1, which comprises two side parts 2, 3, the have feet 4, 5 below.

Oberhalb der Füße 4, 5 befindet sich zwischen den Seitenteilen 2, 3 ein Kasten 6 des Gehäuses 1, in dem sich ein Arbeitsraum 7 befindet. Der Arbeitsraum 7 ist unten durch eine Arbeitsfläche 8 begrenzt und ist von vorn durch eine Arbeitsöffnung 9 zugänglich, die sich direkt oberhalb der Arbeitsfläche 8 befindet. Die Arbeitsöffnung 9 hat die Form eines schmalen Rechteckes, das sich horizontal entlang der gesamten Arbeitsfläche 8 erstreckt. Above the feet 4, 5 is located between the side parts 2, 3, a box 6 of the Housing 1, in which a working space 7 is located. The working space 7 is below limited by a work surface 8 and is from the front through a working opening. 9 accessible, which is located directly above the work surface 8. The work opening 9 has the shape of a narrow rectangle that extends horizontally along the entire work surface 8 extends.

Unterhalb der Arbeitsfläche 8 befindet sich im Gehäuse 1 ein Zwischenraum 10. Dieser ist durch einen Luftaustritt 11 mit dem Arbeitsraum 7 verbunden, der durch eine Vielzahl Öffnungen in der Arbeitsfläche 8, die sich bevorzugt an deren vorderem und hinterem Rand befinden, sich aber auch in deren Mittelbereich befinden könnten, gebildet ist.Below the work surface 8 is located in the housing 1, a gap 10th This is connected by an air outlet 11 with the working space 7 through a plurality of openings in the work surface 8, preferably at the front and rear edge, but are also in the middle area could, is formed.

Unterhalb des Zwischenraumes 10 ist ein Filtergehäuse 12 des Gehäuses 1 angeordnet, das sich zwischen den Füßen 4, 5 über die gesamte Breite der Arbeitsfläche 8 erstreckt. Das Filtergehäuse 12 ist unter dem hinteren Teil der Arbeitsfläche 8 angeordnet. Es ist im Vertikalschnitt im wesentlichen keilförmig, unten jedoch abgeflacht. Unten weist das Filtergehäuse 12 einen Abstand zum Boden auf, der einen Fußraum freiläßt. Vorn weist es oben eine Gehäusefläche 13 auf, die zur Horizontalen geneigt ist, und sich über seine gesamte Breite erstreckt. Die Gehäusefläche 13 hat kreisrunde Öffnungen 14 (im Beispiel sind dies sechs), in die Patronenfilter 15 mit kreiszylindrischen Filterkörpern 16 eingesetzt sind.Below the intermediate space 10, a filter housing 12 of the housing 1 is arranged, that is between the feet 4, 5 over the entire width of the work surface 8 extends. The filter housing 12 is arranged under the rear part of the work surface 8. It is in the vertical section substantially wedge-shaped, but flattened below. Below the filter housing 12 at a distance from the ground, a Footwell releases. In front, it has a top housing surface 13, which is horizontal is inclined, and extends over its entire width. The housing surface 13 has circular openings 14 (in the example, these are six), in the cartridge filter 15th are used with circular cylindrical filter bodies 16.

Die Filterkörper 16 sind jeweils von einem plissierten Filtermaterial gebildet, das entlang einer Längsklebung zu einem Zylinder geschlossen ist. Die Filterkörper 16 sind oben mit einem Deckel 17 vergossen, der eine Öffnung 18 aufweist, dessen Querschnitt dem Innenquerschnitt des Filterkörpers 16 entspricht. Die Deckel 17 haben einen seitlich überstehenden Randflansch 19. Der Randflansch 19 liegt an der Oberseite der Gehäusefläche 13 an und ist mit dieser über nicht gezeigte Schrauben verschraubt. Zwischen dem Randflansch 19 und der Gehäusefläche 13 befindet sich ein nicht gezeigter Dichtring aus Schaumstoff, der an die Unterseite des Randflansches 19 angespritzt ist. Hierdurch sind die Patronenfilter 15 abdichtend im Gehäuse 1 gehalten.The filter bodies 16 are each formed by a pleated filter material, the closed along a longitudinal bond to a cylinder. The filter body 16 are potted at the top with a lid 17 having an opening 18, whose Cross section corresponds to the inner cross section of the filter body 16. The lid 17 have a laterally projecting edge flange 19. The edge flange 19 is located on the Top of the housing surface 13 and is with this not shown screws screwed. Between the edge flange 19 and the housing surface 13 is located a not shown sealing ring made of foam, which is attached to the underside of the edge flange 19 is injected. As a result, the cartridge filter 15 sealing in Housing 1 held.

Unten sind die Patronenfilter 15 durch geschlossene Deckel 20 geschlossen. Below the cartridge filter 15 are closed by closed lid 20.

Die Filterkörper 16 sind endseitig in nicht gezeigte Nuten in den Deckeln 17, 20 eingesteckt und in diese eingegossen.The filter body 16 are end in not shown grooves in the lids 17, 20th inserted and poured into this.

Vor dem Filtergehäuse 12 ist der Zwischenraum 10 unten durch eine weitere Gehäusefläche 21 abgedichtet, die parallel zur Arbeitsfläche 8 verläuft. Hinter der geneigten Gehäusefläche 13 hat das Filtergehäuse 12 oben eine kurze horizontale Gehäusefläche 22 zur Abdichtung gegenüber dem Zwischenraum 10.In front of the filter housing 12, the intermediate space 10 is below through a further housing surface 21 sealed, which runs parallel to the work surface 8. Behind the inclined housing surface 13, the filter housing 12 has a short horizontal top Housing surface 22 for sealing against the gap 10th

Hinten sind der Arbeitsraum 7 und der Zwischenraum 10 durch eine Rückwand 23 begrenzt. Zwischen dieser und einer Gehäuserückwand 24 ist ein Rückströmkanal 25 vorhanden, der in den Oberbereich 26 des Gehäuses 1 oberhalb des Arbeitsraumes 7 führt.Rear are the working space 7 and the gap 10 through a rear wall 23rd limited. Between this and a housing rear wall 24 is a return flow channel 25 present in the upper region 26 of the housing 1 above the working space 7 leads.

Der Rückströmkanal 25 mündet in einem Gebläseraum 27.The return flow channel 25 opens into a fan chamber 27.

Im Gebläseraum 27 befindet sich ein Gebläse 28, das eingangsseitig mit dem Gebläseraum 27 verbunden ist. Ausgangsseitig ist das Gebläse 28 über einen nicht gezeichneten Druckraum ("Plenum") mit einem Abluftfilter 29 an der Oberseite des Gehäuses 1 und einem Umluftfilter 30 an einem Lufteintritt 31 an der Oberseite des Arbeitsraumes 7 verbunden. Der Abluftfilter 29 und der Umluftfilter 30 sind im wesentlichen plan, wobei sie ebenfalls gefaltetes Filtermaterial umfassen. Das Gebläse 28 fördert somit angesaugte Luft in einem festen Verhältnis durch das Abluftfilter 29 in die Umgebung und durch das Umluftfilter 30 in den Arbeitsraum 7. In the fan room 27 is a fan 28, the input side with the fan room 27 is connected. On the output side, the blower 28 via a not drawn pressure chamber ("plenum") with an exhaust filter 29 at the top of the Housing 1 and a recirculating air filter 30 at an air inlet 31 at the top of the Workroom 7 connected. The exhaust filter 29 and the circulating air filter 30 are in essential plan, wherein they also include folded filter material. The Blower 28 thus promotes sucked air in a fixed ratio by the Exhaust filter 29 into the environment and through the circulating air filter 30 in the working space 7th

Es versteht sich, daß die vorerwähnten luftführenden Räume seitlich durch die Seitenteile 2, 3 dicht geschlossen sind und auch auf der Vorderseite dichte Begrenzungswände vorhanden sind.It is understood that the aforementioned air-conducting spaces laterally through the side panels 2, 3 are tightly closed and also on the front dense boundary walls available.

Bei Betrieb der Sicherheitswerkbank erzeugt das Gebläse 28 eingangsseitig einen Unterdruck, der bewirkt, daß Arbeitsraumluft aus dem Arbeitsraum 7 und Umgebungsluft aus der Arbeitsöffnung 9 durch den Luftaustritt 11 in den Zwischenraum 10, von dort durch die Patronenfilter 15 filternd durch den Rückströmkanal 25 abgezogen wird. In den Rückströmkanal 25 gelangt infolgedessen gefilterte Luft, die frei ist von Kontaminationen. Der Abluftfilter 29 und der Umluftfilter 30 hinter dem Gebläse 28 sind vorhanden, um für den Fall des Versagens der Patronenfilter 15 die erforderliche Filterung der Arbeitsraumluft und der Umgebungsluft (zusammen auch "Mischluft" genannt) zu bewirken.When operating the safety cabinet, the blower 28 generates an input side Vacuum, which causes working space air from the working space 7 and Ambient air from the working opening 9 through the air outlet 11 into the intermediate space 10, from there through the cartridge filter 15 filtering through the return flow 25th is deducted. As a result, filtered air, which flows into the return flow channel 25 is free from contamination. The exhaust filter 29 and the recirculating air filter 30 behind the Blowers 28 are provided to the in the event of failure of the cartridge filter 15 the required filtering of working air and ambient air (together also To cause "mixed air").

Die vom Gebläse 28 durch den Abluftfilter 29 nach außen geförderte Luft wird durch das Nachströmen von Umgebungsluft durch die Arbeitsöffnung 9 ersetzt.The air supplied by the blower 28 through the exhaust filter 29 to the outside is replaced by the flow of ambient air through the working opening 9.

Die Strömungsführung und Gestaltung der Filter sowie der Lufteintritte und - austritte bewirken eine laminare, turbulenzarme Verdrängungsströmung im gesamten Arbeitsraum 7.The flow guidance and design of the filters and the air inlets and - exits cause a laminar, low-turbulence displacement flow in the entire working space 7.

Der Experimentator sitzt vor der Arbeitsöffnung 9, wobei er seine Beine und Füße bequem unter der Arbeitsfläche 8 und dem Filtergehäuse 12 anordnen kann.The experimenter sits in front of the work opening 9, taking his legs and feet comfortably under the working surface 8 and the filter housing 12 can arrange.

Im Bedarfsfalle kann die Arbeitsfläche 8 leicht zum Austauschen der Patronenfilter 15 abgenommen bzw. geöffnet werden.If necessary, the work surface 8 can easily replace the cartridge filter 15 be removed or opened.

Claims (19)

  1. Safety workbench with:
    a housing (1) with a box-shaped workspace (7), which has a work surface (8) below and an air discharge (11) for workspace air and a work opening (9) on the front side for access to the workspace (7) and for the inflow of ambient air,
    a row of cartridge filters (15) arranged below the work surface (8) that have an open cover (17) on one end of the cylindrical filter body (16) and a closed cover (20) on the other end of the filter body (16), have a sealed fit in the housing (1) on the open cover (17), and are connected with the air discharge (11) on one side of the filter body (16) and
    a fan (28), which is connected pneumatically on the input side with the other side of the filter body (16) in order to siphon off the workspace air and/or the ambient air through the air discharge (11) and to filter it in the cartridge filters (15) and which is connected on the output side with the environment and optionally an air intake (31) of the workspace (7) outside of the work surface (8) in order to release the filtered air at least partially into the environment while balancing the released air through the inflow of ambient air through the work opening (9) and optionally to move filtered air into the workspace (7).
  2. Safety workbench according to claim 1, in which the filter body (16) consists of an unfolded or folded and/or seamless or at least one filter material with a sealing connection.
  3. Safety workbench according to claim 1 or 2, in which the filter body (16) is glued and/or casted with the covers (17, 20) in a sealing manner on the end side.
  4. Safety workbench according to one of claims 1 through 3, in which the filter body (16) is inserted in grooves of the cover (17, 20).
  5. Safety workbench according to. one of claims 1 through 4, in which a gasket is arranged between both the open cover (17) and the housing (1).
  6. Safety workbench according to claim 5, in which the gasket is directly injection molded onto the open cover (17).
  7. Safety workbench according to one of claims 1 through 6, in which the open cover (17) has an edge flange (19) extending laterally over the filter body (16).
  8. Safety workbench according to claim 7, in which the open cover (17) is bolted on the edge flange (19) with the housing (1).
  9. Safety workbench according to one of claims 1 through 8, in which the cartridge filters (15) have the open cover (17) on top and the opening is pneumatically connected with the air discharge (11) of the workspace (7).
  10. Safety workbench according to one of claims 1 through 9, in which the row of cartridge filters (15) is arranged under the edge of the work surface (8) opposite the work opening (9).
  11. Safety workbench according to one of claims 1 through 10, in which the axes of the cartridge filters (15) are vertically inclined, whereby the upper cover (17) has less separation distance from the work opening (9) than the lower cover (20).
  12. Safety workbench according to one of claims 1 through 11, in which the open cover of the filter cartridges is arranged above and is sealed from the housing.
  13. Safety workbench according to one of claims 1 through 12, in which a gap (10) is present below the work surface (8) and above the cartridge filter (15).
  14. Safety workbench according to one of claims 1 through 13, in which the gap (10) is partially restricted by a horizontally inclined housing surface (13), with respect to which the cartridge filter (15) is sealed.
  15. Safety workbench according to one of claims 1 through 14, in which the cartridge filters (15) are arranged in a filter housing (12) that is arranged below the work surface (8).
  16. Safety workbench according to one of claims 1 through 15, in which the filter housing (12) has a mainly wedge-shaped cross-section.
  17. Safety workbench according to one of claims 1 through 16, in which the filter housing (12) ends at a distance above the floor so that there is legroom between the floor and the filter housing (12).
  18. Safety workbench according to one of claims 1 through 17, in which the housing (1) has two lateral feet (4, 5), between which the workspace (7) and the filter housing (12) are arranged.
  19. Safety workbench according to one of claim 1 through 18, in which the feet (4, 5) have a C-form that opens towards the front.
EP02023245A 2001-11-20 2002-10-17 Safety workbench Expired - Lifetime EP1312871B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10157950 2001-11-20
DE10157950A DE10157950C2 (en) 2001-11-20 2001-11-20 Safety Cabinet

Publications (2)

Publication Number Publication Date
EP1312871A1 EP1312871A1 (en) 2003-05-21
EP1312871B1 true EP1312871B1 (en) 2005-04-13

Family

ID=7707007

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02023245A Expired - Lifetime EP1312871B1 (en) 2001-11-20 2002-10-17 Safety workbench

Country Status (4)

Country Link
EP (1) EP1312871B1 (en)
AT (1) ATE293233T1 (en)
DE (2) DE10157950C2 (en)
DK (1) DK1312871T3 (en)

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EP2918939A1 (en) 2014-03-14 2015-09-16 BERNER INTERNATIONAL GmbH Filter cartridge for a safety workbench and safety workbench with at least one filter cartridge
KR20170132787A (en) * 2015-03-15 2017-12-04 발트너 아게 Ventilation workbench for weighing

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FR2889987B1 (en) * 2005-08-31 2008-10-24 Erea Sa Sa WORKING STATION, IN PARTICULAR FOR FRACTIONATION, SAMPLING AND WEIGHTING OPERATIONS OR ANY CONFINED HANDLING, BY MANIPULATING OPERATORS FOR THE PREVENTION OF CROSS CONTAMINATIONS
CH699257B1 (en) 2006-05-15 2010-02-15 Skan Ag Filter device for a clean room.
CH700390A1 (en) 2009-02-05 2010-08-13 Skan Ag Filter device for a gas stream flowing through it plant with a working chamber for the temporary accommodation of treated.
DE102012018474B4 (en) 2012-09-19 2022-06-30 Berner International Gmbh Safety workbench with a sensor device for detecting movements in front of the front
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CN113843246A (en) * 2021-10-09 2021-12-28 广东天赐湾实验室装备制造有限公司 Be suitable for bellows and fume chamber of rectification

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KR20010113901A (en) * 1999-04-28 2001-12-28 스트라토테크 코포레이션 Adjustable clean-air flow environment

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2918939A1 (en) 2014-03-14 2015-09-16 BERNER INTERNATIONAL GmbH Filter cartridge for a safety workbench and safety workbench with at least one filter cartridge
DE102014003486A1 (en) 2014-03-14 2015-09-17 Berner International Gmbh Filter cartridge for a safety cabinet and safety cabinet with at least one filter cartridge
KR20170132787A (en) * 2015-03-15 2017-12-04 발트너 아게 Ventilation workbench for weighing
CN107635680A (en) * 2015-03-15 2018-01-26 瓦尔德纳股份公司 Weigh fume hood

Also Published As

Publication number Publication date
EP1312871A1 (en) 2003-05-21
ATE293233T1 (en) 2005-04-15
DE50202774D1 (en) 2005-05-19
DE10157950C2 (en) 2003-12-24
DE10157950A1 (en) 2003-05-28
DK1312871T3 (en) 2005-08-15

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