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DE961592C - HEPA filters made of folded, flat building material, especially paper - Google Patents

HEPA filters made of folded, flat building material, especially paper

Info

Publication number
DE961592C
DE961592C DED10607D DED0010607D DE961592C DE 961592 C DE961592 C DE 961592C DE D10607 D DED10607 D DE D10607D DE D0010607 D DED0010607 D DE D0010607D DE 961592 C DE961592 C DE 961592C
Authority
DE
Germany
Prior art keywords
filter
folded
building material
wire mesh
star
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
Application number
DED10607D
Other languages
German (de)
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.)
Draegerwerk AG and Co KGaA
Original Assignee
Draegerwerk AG and Co KGaA
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 Draegerwerk AG and Co KGaA filed Critical Draegerwerk AG and Co KGaA
Priority to DED10607D priority Critical patent/DE961592C/en
Application granted granted Critical
Publication of DE961592C publication Critical patent/DE961592C/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13Supported filter elements
    • B01D29/15Supported filter elements arranged for inward flow filtration
    • B01D29/21Supported filter elements arranged for inward flow filtration with corrugated, folded or wound sheets
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62BDEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B23/00Filters for breathing-protection purposes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Description

Schwebstoffilter aus gefaltetem, flächenhaftem Baustoff, insbesondere Papier Es sind Slchwebls,toffillter, und zwar sogenannte Sternfilter bekannt, bei denen das Papier, im Querschnitt gesehen, zu einem Stern gefaltet ist. Derartige Filter sind bisher vorwiegend nur für Filter einer geringen Höhe gebaut worden, dieses unter anderem aus dem Grunde, da aas gefaltete Papier insbesondere unter dem Einfluß von Feuchtigkeit und wechselnden Temperaturen dazu neigt, seine ursprüngliche Form zu verlieren. Da die gefalteten Flächen nun meist eng beieinanderliegen, ergibt sich der Nachteil, daß sich die Flächen gegenseitig berühren, wodurch naturgemäß die wirksame Oberfläche des Filters stark verringert wird.HEPA filters made of folded, flat building material, in particular paper Slchwebls, toffillter, so-called star filters are known at which the paper, seen in cross section, is folded into a star. Such Filters have so far mainly been built for filters of a low height, this, among other things, for the reason that aas folded paper in particular under the influence of moisture and changing temperatures tends to its original Losing shape. Since the folded surfaces are now mostly close together, results the disadvantage that the surfaces touch each other, which naturally the effective surface of the filter is greatly reduced.

Die Erfindung hat sich die Aufgabe gestellt, diese Nachteile zu beseitigen und es zu ermöglichten, slternförmig gefaltete Schwebstoffilte¢ auch in jeder gewünschten Höhe zu bauen, ohne daß die geschilderten Nachteile auftreten. Die Erfindung besteht darin, daß das Faltenfilter zwischen einem Gerüst aus zwei der Faltelung des Faltenfilters entsprechend gefalteten Streifen aus Drahtgewebe oder einem ähnlichen Baustoff liegt. The invention has set itself the task of eliminating these disadvantages and to make it possible to use star-shaped folded particulate filters ¢ in any desired Build height without the disadvantages described occur. The invention exists in that the pleated filter between a framework of two of the pleating of the pleated filter appropriately folded strips of wire mesh or a similar building material.

Das Gerüst kann auch unterteilt sein und aus aus Drahtgeweben oder ähnlichen Baustoffen gebildeten Winkelstücken bestehen, die um und/oder in die Filterfalten gelegt sind. The framework can also be subdivided and made of wire mesh or Similar building materials are made of elbows around and / or in the filter folds are laid.

Auch kann es vorteilhaft sein, das Filter zwischen konzentrischen Ringen aus Drahtgeweben oder ähnlichem Baustoff zu legen. Das Gerüst kann aus Drahtgeweben, durchlochten Blechstreifen od. dgl. gebildet sein. It can also be advantageous to have the filter between concentric To lay rings made of wire mesh or similar building material. The framework can be made of wire mesh, perforated sheet metal strips or the like. Be formed.

Abgesehen davon, daß erfindungsgemäß ein Berühren der Filterfalten und damit eine Verringerung der Filteroberfläche vermieden wird, besteht noch ein Vorteil darin, daß die mechanische Festigkeit des Filters nicht nur durch die Festigkeit der Filtermasse allein bestimmt, sondern wesentlich durch die Festigkeit des Gerüstes erhöht wird. Die Festigkeit dieses Gerüstes kann um ein Vielfaches größer als diejenige des Filterstoffes sein. Schließ lich wird noch durch die erfindungsgemäße Bauart erreicht, daß der empfindliche Baustoff durch das Gerüst vor Beschädigungen geschützt wird. Apart from the fact that, according to the invention, touching the filter folds and so that a reduction in the filter surface is avoided, there is still one The advantage is that the mechanical strength of the filter is not only due to the strength The filter mass is determined solely by the strength of the structure is increased. The strength of this scaffolding can be many times greater than that of the filter material. Finally Lich is still through the design according to the invention achieves that the sensitive building material is protected from damage by the scaffolding will.

Es sind 5 eliweb stoffilter für Gebäudelgasschutz, Fluchtkammern, Raumfilter usw. bekannt, die aus Filterplatten aus Filz, Watte, Zellstoff, Baumwolle, Wollgewebe oder anderen an sich zum Filtrieren bekannten faserigen Materialien bestehen und die leicht auswechselbar mit Zwischenraum in einem Rahmen eingespannt sind. In dem Zwischenraum sind dabei zweckmäßig gewellte Drahtsiebe zum gegenseitigen Abstützen der Filterplatten angebracht. Zum Einspannen der Filterplatten in den Rahmen dienen dann federnde Klappen. Die Verwendung von gewellten Drahtsieben für Sternfilter gibt diesen nicht die gewünschte Festigkeit. There are 5 eliweb fabric filters for building gas protection, escape chambers, Spatial filters, etc. known, which are made from filter plates made of felt, wadding, cellulose, cotton, Wool fabric or other fibrous materials known per se for filtering and which are easily interchangeable and clamped in a frame with space in between. In the space there are expediently corrugated wire screens for mutual Supporting the filter plates attached. For clamping the filter plates in the Frames then serve as resilient flaps. The use of corrugated wire screens for Star filters do not give them the desired strength.

Weiterhin sind Atemschutzfilter mit einem aus paarweise zusammengehaltenen Ringscheiben bestehenden Solveb.stoffllter beIcannt, dessen unterste Ringseheibe mit dem innerenRingraum der das Atemschutzfiltergebäuse abschließenden Lochplatte ver bördel ist. Dableli wird das Schwebstoffflter von einem topfartigen Käfig umgeben, dessen am oberen Rand umbördelte Seitenwand die durch Abstandsringe im Abstand voneinander gehaltenen Filterringscheiben zusammenpreßt. Dabei sind an den Abstandsringen zwischen die Filterringscheiben hineinragende keilförmige Abstandsstege angeordnet. Diese liegen dabei nicht der gesamten Filterfläche an, so daß sie nicht diese auf ihrer ganzen Ausdehnung abstützen. Furthermore, there are respiratory protection filters with one of the pairs held together Ring disks of the existing Solveb with the inner ring space of the perforated plate closing the respiratory protection filter housing ver crimping is. Dableli, the suspended matter filter is surrounded by a pot-like cage, whose side wall beaded at the upper edge is spaced apart by spacer rings held together filter ring disks. There are on the spacer rings between arranged wedge-shaped spacer bars protruding into the filter ring disks. These do not lie against the entire filter surface, so that they do not have this on their support the entire extent.

In der Zeichnung sind mehrere Ausführungsformen des erfindungsgemäßen Schwebstoffilters dargestellt. In the drawing are several embodiments of the invention HEPA filter shown.

Abb. I und z zeigen zwei ähnliche Ausführungsformen eines Sternfilters im Querschnitt, die Abb. 3 und 4 die gleichen Filter im Längsschnitt. Fig. I and z show two similar embodiments of a star filter in cross section, Figs. 3 and 4 show the same filter in longitudinal section.

Das Gerüst besteht in beiden Fällen aus den der Faltelung der Papierbahnen 2 entsprechend winkelförmig einmal gefalteten Drahtsieben 1. Während in Abb. I die steifen Drahtsiebe die Faltkanten des Papiers auf der Außenseite umgreifen, werden bei der Ausführungsform nach Abb. 2 die Kanten der Papierbahn 7 durch die winkelförmig gebogenen Drahtsiebe 6 auf der Außenseite nicht jeweils von einem Drahtsieb umgriffen. Die Siebkeile sind von derselben Breite wie die Papierbahn 2 bzw. 7 und werden mit dieser zusammen in die Klebmasse 3 eingebettet, die in den Deckel 4 und den Boden 5 des Filters eingegossen ist und das Filter zusammenhält. Da die Papierbahn stets zwischen zwei Streifen Drahtsieb liegt, kann sie sich nicht verformen.In both cases, the framework consists of the folding of the paper webs 2 wire screens folded once at an angle 1. While in Fig stiff wire screens encompass the folded edges of the paper on the outside in the embodiment according to Fig. 2, the edges of the paper web 7 through the angular curved wire screens 6 on the outside not each encompassed by a wire screen. The screen wedges are of the same width as the paper web 2 or 7 and are with this is embedded together in the adhesive 3, which is in the cover 4 and the bottom 5 of the filter is poured in and holds the filter together. Because the paper web always If there is between two strips of wire mesh, it cannot deform.

Abb. 5 zeigt einen Querschnitt einer Ausführungsform, bei der das Gerüst aus zwei der Faltelung des Faltenfilters I3 entsprechend gefalteten endlosen Drahtgewebestreifen besteht, zwischen denen das Faltenfilter liegt. Fig. 5 shows a cross section of an embodiment in which the Frame made of two endless ones that are folded according to the folding of the folded filter I3 There is wire mesh strips between which the pleated filter is located.

Abb. 6 zeigt eine Ausführungsform, bei der noch zwei konzentrisch liegende zylindrische steife Drahtsiebe IO und II angeordnet sind, die den Filterstern an den innenliegenden und an den außenliegenden Kanten halten. Fig. 6 shows an embodiment in which two more concentrically lying cylindrical rigid wire screens IO and II are arranged, which form the filter star hold on to the inside and outside edges.

Claims (3)

PATENTANSPRÜCHE: I. Schwebstoffilter aus sternförmig gefaltetem, flächenhaftem Baustoff, insbesondere Papier, dadurch gekennzeichnet, daß das Faltenfilter zwischen einem Gerüst aus zwei der Sternfaltelung des Faltenfilters entsprechend gefalteten Streifen aus Drahtgewebe oder einem ähnlichen Baustoff liegt. PATENT CLAIMS: I. HEPA filter made of a star-shaped folded, Planar building material, in particular paper, characterized in that the folded filter between a frame of two of the star folds of the pleated filter accordingly folded strips of wire mesh or similar building material. 2. Sch!vetbstoffilter nach Anspruch I, dadurch gekennzeichnet, daß das Gerüst unterteilt ist und aus aus um und/oder in die Filterfalten gelegten Drahtgeweben oder ähnlichen Baustoffen gebildeten Winkelstücken besteht. 2. Sch! Vetstoffilter according to claim I, characterized in that the frame is divided and made of wire mesh placed around and / or in the filter folds or similar building materials formed angle pieces. 3. SchFwebstoffil,ter nach Anspruch I oder 2, dadurch gekennzeichnet, daß das Filter zwischen konzentrischen Ringen aus Drahtgewebe und/oder einem ähnlichen Baustoff liegt. 3. SchFwebstoffil, ter according to claim I or 2, characterized in that that the filter between concentric rings made of wire mesh and / or a similar one Building material lies. In Betracht gezogene Druckschriften: Deutsche Patentschriften Nr. 706 554, 585 935; schweizerische Patentschrift Nr. 207 6II; französische Patentschriften Nr. 864404, 785 119. Publications considered: German Patent Specifications No. 706 554, 585 935; Swiss Patent No. 207 6II; French patents No. 864404, 785 119.
DED10607D 1943-05-16 1943-05-16 HEPA filters made of folded, flat building material, especially paper Expired DE961592C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED10607D DE961592C (en) 1943-05-16 1943-05-16 HEPA filters made of folded, flat building material, especially paper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED10607D DE961592C (en) 1943-05-16 1943-05-16 HEPA filters made of folded, flat building material, especially paper

Publications (1)

Publication Number Publication Date
DE961592C true DE961592C (en) 1957-05-16

Family

ID=7033377

Family Applications (1)

Application Number Title Priority Date Filing Date
DED10607D Expired DE961592C (en) 1943-05-16 1943-05-16 HEPA filters made of folded, flat building material, especially paper

Country Status (1)

Country Link
DE (1) DE961592C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1088355B (en) * 1958-06-27 1960-09-01 Auergesellschaft Ag Breathing protection filter to protect against dust and suspended matter
DE1124364B (en) * 1958-04-26 1962-02-22 Draegerwerk Ag Respiratory protection device with a folded fine dust filter arranged in a filter housing
DE1182527B (en) * 1957-12-02 1964-11-26 Draegerwerk Ag Process for the production of particulate filter inserts and particulate filter insert produced by this process

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE585935C (en) * 1931-01-30 1933-10-13 Draegerwerk Ag HEPA filters for building gas protection, escape chambers, room filter devices or the like.
FR785119A (en) * 1934-04-04 1935-08-02 filter element for breathing apparatus and its mounting method
CH207611A (en) * 1937-03-24 1939-11-15 Pirelli Filter with fibrous material protecting against aerosols.
FR864404A (en) * 1939-12-06 1941-04-26 Improvement in filter elements for breathing apparatus
DE706554C (en) * 1939-05-03 1941-05-29 Auergesellschaft Akt Ges Respiratory protection filter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE585935C (en) * 1931-01-30 1933-10-13 Draegerwerk Ag HEPA filters for building gas protection, escape chambers, room filter devices or the like.
FR785119A (en) * 1934-04-04 1935-08-02 filter element for breathing apparatus and its mounting method
CH207611A (en) * 1937-03-24 1939-11-15 Pirelli Filter with fibrous material protecting against aerosols.
DE706554C (en) * 1939-05-03 1941-05-29 Auergesellschaft Akt Ges Respiratory protection filter
FR864404A (en) * 1939-12-06 1941-04-26 Improvement in filter elements for breathing apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1182527B (en) * 1957-12-02 1964-11-26 Draegerwerk Ag Process for the production of particulate filter inserts and particulate filter insert produced by this process
DE1124364B (en) * 1958-04-26 1962-02-22 Draegerwerk Ag Respiratory protection device with a folded fine dust filter arranged in a filter housing
DE1088355B (en) * 1958-06-27 1960-09-01 Auergesellschaft Ag Breathing protection filter to protect against dust and suspended matter

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