DE102011106512A1 - Filter device for filtering air introduced into clean room, has filter comprising air outlet surface, and deflection device arranged at housing between filter and flow straightener and deflecting air leaving from air outlet surface - Google Patents
Filter device for filtering air introduced into clean room, has filter comprising air outlet surface, and deflection device arranged at housing between filter and flow straightener and deflecting air leaving from air outlet surface Download PDFInfo
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- DE102011106512A1 DE102011106512A1 DE102011106512A DE102011106512A DE102011106512A1 DE 102011106512 A1 DE102011106512 A1 DE 102011106512A1 DE 102011106512 A DE102011106512 A DE 102011106512A DE 102011106512 A DE102011106512 A DE 102011106512A DE 102011106512 A1 DE102011106512 A1 DE 102011106512A1
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- Prior art keywords
- air outlet
- filter
- air
- housing
- outlet surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
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- 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
- F24F3/167—Clean rooms, i.e. enclosed spaces in which a uniform flow of filtered air is distributed
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Ventilation (AREA)
Abstract
Description
Die Erfindung betrifft eine Filtervorrichtung zur Verwendung in der Reinraumtechnik gemäß Oberbegriff des Anspruchs 1.The invention relates to a filter device for use in clean room technology according to the preamble of claim 1.
In der Reinraumtechnik kommen Filtervorrichtungen zum Einsatz, die die in den Reinraum eingeleitete Luft filtern. Die Filtervorrichtungen weisen gemäß Stand der Technik ein Gehäuse auf, in dem mindestens ein Filter angeordnet ist. Das Gehäuse weist eine Lufteinlassöffnung auf, durch die Frischluft in das Gehäuse geleitet wird. Die Frischluft durchströmt den oder die Filter, wird dort gereinigt und zu einer Luftauslassöffnung des Gehäuses weitergeleitet. In der Luftauslassöffnung ist ein Strömungsgleichrichter, beispielsweise ein sogenannter CG-Verteiler, angeordnet, der das Auftreten von Turbulenzen in der aus der Filtervorrichtung in den Reinraum eingeleiteten Luft weitgehend verhindert. Zur weiteren Vermeidung von Turbulenzen der in den Reinraum eingeleiteten Luft wird bereits im Bereich zwischen der Luftaustrittsfläche des Filters oder der Filter und dem Strömungsgleichrichter, der meist mit einem Abstand von 10 cm bis 20 cm zur Luftaustrittsfläche angeordnet ist, eine turbulenzarme Strömung angestrebt. Zu diesem Zweck wird bei bekannten Filtervorrichtungen jegliche Umlenkung des Luftstroms zwischen dem Filter oder den Filtern und dem Strömungsgleichrichter weitestgehend vermieden. Filtervorrichtungen müssen jedoch von Zeit zu Zeit auf mögliche Lecks geprüft werden. Dabei wird ein Testaerosol durch den Lufteinlaß eingeleitet, und mit einer mit einem Zähler verbundenen Sonde wird gemessen, in welcher Konzentration oder Menge das Testaerosol durch den oder die Filter durchtritt. Die Sonde wird dabei an der Luftaustrittsfläche des Filters oder der Filter angeordnet. Da die Strömung zwischen der Luftaustrittsfläche und dem Strömungsgleichrichter bereits weitgehend turbulenzarm ist, kann jedoch nur Aerosol mittels der Sonde gemessen werden, das direkt am Ort der Sonde aus der Luftaustrittsfläche austritt. Aus diesem Grund muß die Sonde über die Luftaustrittsfläche bewegt werden, so dass diese durch Messung an einer Vielzahl von Messpunkten vollflächig abgescannt wird. Hierzu muß der Strömungsgleichrichter entfernt werden, und es muß in den Reinraum eingegriffen werden, was diesen für die Dauer der Messung unbenutzbar macht und zudem den Messaufwand erhöht.In clean room technology filter devices are used, which filter the air introduced into the clean room. The filter devices according to the prior art, a housing in which at least one filter is arranged. The housing has an air inlet opening through which fresh air is directed into the housing. The fresh air flows through the filter or filters, where it is cleaned and forwarded to an air outlet opening of the housing. Arranged in the air outlet opening is a flow rectifier, for example a so-called CG distributor, which largely prevents the occurrence of turbulence in the air introduced from the filter device into the clean room. To further avoid turbulence of the introduced into the clean air is already in the area between the air outlet surface of the filter or the filter and the flow straightener, which is usually arranged with a distance of 10 cm to 20 cm to the air outlet surface, a low-turbulence flow sought. For this purpose, any deflection of the air flow between the filter or the filters and the flow straightener is largely avoided in known filter devices. However, filter devices must be checked for leaks from time to time. In this case, a test aerosol is introduced through the air inlet, and with a probe connected to a counter is measured, in what concentration or amount the test aerosol passes through the filter or filters. The probe is arranged at the air outlet surface of the filter or the filter. Since the flow between the air outlet surface and the flow straightener is already largely turbulence-poor, however, only aerosol can be measured by means of the probe, which emerges from the air outlet surface directly at the location of the probe. For this reason, the probe must be moved over the air outlet surface, so that it is scanned completely by measurement at a plurality of measuring points. For this purpose, the flow rectifier must be removed, and it must be intervened in the clean room, which makes it unusable for the duration of the measurement and also increases the measurement cost.
Es ist daher Aufgabe der Erfindung, eine Filtervorrichtung der eingangs genannten Art derart weiterzubilden, dass eine Leckprüfung mit weniger Aufwand möglich ist.It is therefore an object of the invention to provide a filter device of the type mentioned in such a way that a leak test is possible with less effort.
Diese Aufgabe wird erfindungsgemäß durch eine Filtervorrichtung mit den Merkmalen des Anspruchs 1 gelöst. Vorteilhafte Weiterbildungen der Erfindung sind Gegenstand der abhängigen Ansprüche.This object is achieved by a filter device with the features of claim 1. Advantageous developments of the invention are the subject of the dependent claims.
Der Erfindung liegt der Gedanke zugrunde, die aus der Luftaustrittsfläche austretende Luft vor der Durchleitung durch den Strömungsgleichrichter zu vermischen. Dadurch wird es möglich, bei der Dichtigkeitsüberprüfung die Sonde an einem Ort zu belassen, da die Aerosolkonzentration örtlich nicht so stark differiert wie wenn keine Turbulenzen zwischen der Luftaustrittsfläche und dem Strömungsgleichrichter auftreten, sondern weitgehend ortsunabhängig ist. Während im Stand der Technik gelehrt wird, Turbulenzen zwischen der Luftaustrittsfläche und dem Strömungsgleichrichter nach Möglichkeit zu vermeiden, sind solche Turbulenzen bei der erfindungsgemäßen Filtervorrichtung erwünscht und werden insbesondere durch die Umlenkeinrichtung erzeugt. Die Messsonde kann dann ortsfest im Gehäuse befestigt sein und Testaerosol über eine ebenfalls ortsfeste Leitung einem Detektor zuführen. Bei der Überprüfung der Filtervorrichtung auf Dichtigkeit muß dann nicht mehr in den Reinraum eingegriffen werden, sondern es muß lediglich der Detektor an die Sonde angeschlossen werden. Dies kann über einen ortsfesten Anschluß, insbesondere außerhalb des Reinraums, erfolgen.The invention is based on the idea to mix the air emerging from the air outlet surface before passing through the flow straightener. This makes it possible to leave the probe at a location in the leak test, since the aerosol concentration does not differ locally as much as when no turbulence between the air outlet surface and the flow straightener occur, but is largely independent of location. While it is taught in the prior art to avoid turbulence between the air outlet surface and the flow straightener as far as possible, such turbulence is desirable in the filter device according to the invention and is generated in particular by the deflection device. The probe can then be fixed in place in the housing and supply test aerosol via a likewise fixed line to a detector. When checking the filter device for leaks then no longer must be intervened in the clean room, but it must only be connected to the detector to the probe. This can be done via a stationary connection, in particular outside the clean room.
Es wird bevorzugt, dass die Umlenkeinrichtung die Luft um mindestens 90° umlenkt. Für eine gute Durchmischung ist insbesondere eine mehrfache Umlenkung um mindestens 90° vorteilhaft. Zweckmäßig weist die Umlenkeinrichtung mindestens eine Umlenkwand auf, die im Abstand zur Luftaustrittsflache des mindestens einen Filters angeordnet ist.It is preferred that the deflection deflects the air by at least 90 °. For a good mixing in particular a multiple deflection by at least 90 ° is advantageous. Suitably, the deflection device has at least one deflection wall, which is arranged at a distance from the air outlet surface of the at least one filter.
Gemäß einer bevorzugten Ausführungsform sind im Gehäuse zwei Filter angeordnet, deren Luftaustrittsflächen eine Abluftkammer im Gehäuse begrenzen. Die Luftaustrittsflächen der beiden Filter sind zweckmäßig der mindestens einen Umlenkwand gegenüberliegend angeordnet, und die mindestens eine Umlenkwand begrenzt zudem ebenfalls die Abluftkammer. Die Luftaustrittsflächen der Filter sind vorzugsweise im wesentlichen parallel zur Umlenkwand und im gleichen Abstand über dieser angeordnet. Die aus den Luftaustrittsflächen austretende Luft strömt dann auf die Umlenkwand zu und wird an dieser umgelenkt. Zudem vermischen sich die aus den beiden Filtern austretenden Luftströme miteinander, die an derselben Umlenkwand umgelenkt werden.According to a preferred embodiment, two filters are arranged in the housing whose air outlet surfaces define an exhaust air chamber in the housing. The air outlet surfaces of the two filters are expediently arranged opposite the at least one deflecting wall, and the at least one deflecting wall also also delimits the exhaust air chamber. The air outlet surfaces of the filter are preferably arranged substantially parallel to the deflection wall and at the same distance above it. The air emerging from the air outlet surfaces then flows to the deflection wall and is deflected at this. In addition, the emerging from the two filters air streams mix with each other, which are deflected at the same deflection wall.
Im Gehäuse ist zweckmäßig eine quer zur Umlenkwand angeordnete Querwand aufgenommen, die mindestens eine zu einer den Luftauslass aufweisenden Luftauslasskammer führende Durchlassöffnung aufweist. Durch die Durchlassöffnung strömt die Luft von der Abluftkammer in die Luftauslasskammer. Um durch die Durchlassöffnung durchtreten zu können, ist eine weitere Richtungsänderung des Luftstroms erforderlich, so dass sich eine weitere Durchmischung ergibt.In the housing, a transverse wall arranged transversely to the deflection wall is expediently accommodated, which has at least one passage opening leading to an air outlet chamber having the air outlet. Through the passage opening, the air flows from the exhaust chamber into the air outlet chamber. To be able to pass through the passage opening, a further change in direction of the air flow is required, so that there is a further mixing.
Vorteilhaft ist im Gehäuse zwischen dem mindestens einen Filter und dem Strömungsgleichrichter mindestens eine Sonde zum Ableiten eines Testaerosols zu einem Detektor angeordnet. Die Sonde ist zweckmäßig an der Durchlassöffnung angeordnet, wo bereits eine weitgehende Durchmischung der durch den oder die Filter durchgeleiteten Luft erfolgt ist.Advantageously, at least one probe for discharging a test aerosol to a detector is arranged in the housing between the at least one filter and the flow rectifier. The probe is expediently arranged at the passage opening, where a thorough mixing of the air passed through the filter or filters has already taken place.
Im Folgenden wird die Erfindung anhand eines in der Zeichnung schematisch dargestellten Ausführungsbeispiels näher erläutert. Es zeigenIn the following the invention will be explained in more detail with reference to an embodiment schematically illustrated in the drawing. Show it
Die in
Im Gehäuse
Zusammenfassend ist folgendes festzuhalten:
Die Erfindung betrifft eine Filtervorrichtung
The invention relates to a
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE102011106512A DE102011106512A1 (en) | 2011-06-15 | 2011-06-15 | Filter device for filtering air introduced into clean room, has filter comprising air outlet surface, and deflection device arranged at housing between filter and flow straightener and deflecting air leaving from air outlet surface |
Applications Claiming Priority (1)
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DE102011106512A DE102011106512A1 (en) | 2011-06-15 | 2011-06-15 | Filter device for filtering air introduced into clean room, has filter comprising air outlet surface, and deflection device arranged at housing between filter and flow straightener and deflecting air leaving from air outlet surface |
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DE102011106512A1 true DE102011106512A1 (en) | 2013-01-03 |
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DE102011106512A Withdrawn DE102011106512A1 (en) | 2011-06-15 | 2011-06-15 | Filter device for filtering air introduced into clean room, has filter comprising air outlet surface, and deflection device arranged at housing between filter and flow straightener and deflecting air leaving from air outlet surface |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10151679B2 (en) | 2015-04-08 | 2018-12-11 | Emd Millipore Corporation | Enhanced aerosol test for assessing filter integrity |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3513902A1 (en) * | 1984-04-17 | 1985-10-24 | Environmental Air Control, Inc., Hagerstown, Md. | SPACE-SAVING FAN AND FILTER ARRANGEMENT FOR USE IN CLEAN AIR AREAS |
DE8805774U1 (en) * | 1988-04-30 | 1988-06-23 | Babcock-BSH AG vormals Büttner-Schilde-Haas AG, 4150 Krefeld | Tunnel module for setting up a clean room using laminar flow technology |
DE9116423U1 (en) * | 1991-07-08 | 1992-09-17 | Babcock-BSH AG vormals Büttner-Schilde-Haas AG, 4150 Krefeld | Module for building a cleanroom ceiling |
FR2700203A1 (en) * | 1993-01-04 | 1994-07-08 | Cherrier Gerard | Laminar flow air diffusor |
DE202005000661U1 (en) * | 2004-11-24 | 2005-06-09 | Weiss Klimatechnik Gmbh | Circulating air ceiling module for a room, especially an operating theater, comprises a circulating air module formed as a stand with a suction opening, a filter, a ventilator and an air outlet connected to a pressure body of the ceiling |
-
2011
- 2011-06-15 DE DE102011106512A patent/DE102011106512A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3513902A1 (en) * | 1984-04-17 | 1985-10-24 | Environmental Air Control, Inc., Hagerstown, Md. | SPACE-SAVING FAN AND FILTER ARRANGEMENT FOR USE IN CLEAN AIR AREAS |
DE8805774U1 (en) * | 1988-04-30 | 1988-06-23 | Babcock-BSH AG vormals Büttner-Schilde-Haas AG, 4150 Krefeld | Tunnel module for setting up a clean room using laminar flow technology |
DE9116423U1 (en) * | 1991-07-08 | 1992-09-17 | Babcock-BSH AG vormals Büttner-Schilde-Haas AG, 4150 Krefeld | Module for building a cleanroom ceiling |
FR2700203A1 (en) * | 1993-01-04 | 1994-07-08 | Cherrier Gerard | Laminar flow air diffusor |
DE202005000661U1 (en) * | 2004-11-24 | 2005-06-09 | Weiss Klimatechnik Gmbh | Circulating air ceiling module for a room, especially an operating theater, comprises a circulating air module formed as a stand with a suction opening, a filter, a ventilator and an air outlet connected to a pressure body of the ceiling |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10151679B2 (en) | 2015-04-08 | 2018-12-11 | Emd Millipore Corporation | Enhanced aerosol test for assessing filter integrity |
CN113670788A (en) * | 2015-04-08 | 2021-11-19 | Emd密理博公司 | Enhanced aerosol test for evaluating filter integrity |
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