DE728602C - HEPA filter for breathing apparatus - Google Patents

HEPA filter for breathing apparatus

Info

Publication number
DE728602C
DE728602C DEA69790D DEA0069790D DE728602C DE 728602 C DE728602 C DE 728602C DE A69790 D DEA69790 D DE A69790D DE A0069790 D DEA0069790 D DE A0069790D DE 728602 C DE728602 C DE 728602C
Authority
DE
Germany
Prior art keywords
filter
folds
air inlet
hepa filter
breathing apparatus
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
DEA69790D
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.)
BERNH DRAEGER
Draegerwerk AG and Co KGaA
Original Assignee
BERNH DRAEGER
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 BERNH DRAEGER, Draegerwerk AG and Co KGaA filed Critical BERNH DRAEGER
Priority to DEA69790D priority Critical patent/DE728602C/en
Application granted granted Critical
Publication of DE728602C publication Critical patent/DE728602C/en
Expired legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62BDEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B23/00Filters for breathing-protection purposes

Landscapes

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

Description

Schwebstoffi.lter für Atemschutzgeräte Die Erfindung betrifft ein Schwebstoffilter für Atemschutzgeräte, bei dem die als endloses Band ,ausgebildete Filterschicht in parallel zur Achse des Filtergehäuses verlaufende Falten gelegt und mit den Stirnkanten zwischen zwei Abdeckplatten angeordnet ist. Von den Abdeckplatten ist eine mit einer Lufteinlaß- oder Luftausl.aßöffnung versehen. Bei den bekannten Schwebstoffiltern ist die Filterschicht so gefaltet, daß die Falten im wesentlichen radial verlaufen. Die äußeren Faltenabstände sind dabei größer als die inneren Faltenabstände, so daß der vorhandene Raum für die Unterbringung der gefalteten Filterschicht wenig günstig ausgenutzt wird.Suspended matter filter for breathing apparatus The invention relates to a HEPA filter for respiratory protective devices, in which the endless belt is designed Filter layer placed in folds running parallel to the axis of the filter housing and is arranged with the front edges between two cover plates. From the cover plates one is provided with an air inlet or air outlet opening. With the known HEPA filters, the filter layer is pleated so that the pleats are essentially run radially. The outer pleat distances are larger than the inner pleat distances, so that the space available for accommodating the pleated filter sheet is little is exploited favorably.

Die Erfindung besteht nun darin, daß die Falten des Schwebstoffilters in paralleler Zickzackfaltung verlaufen und spitze Winkel miteinander einschließen.The invention now consists in the folds of the particulate filter run in parallel zigzag folds and enclose acute angles with each other.

Bei einem in dieser Weise ausgebildeten Schwebstoffilter ist die Lufteintrittstasche genau so groß wie die Luftaustrittstasche. Natürlich müssen die Falten zwecks bester Raumausnutzung bis an die Büchsenwand heranreichen.In the case of a particulate filter designed in this way, the air inlet pocket is just as big as the air outlet pocket. Of course, the wrinkles need to be the best in order to do this Use space up to the wall of the can.

In der Zeichnumg ist ein Ausführungsbeispiel des Erfindungsgegenstandes dargestellt.In the drawing is an embodiment of the subject matter of the invention shown.

Abb. i ist ein Schnitt nach der Linie A-B der Abb. 2 durch eine mit dem neuen Schwebstoffilter beschickte Filterbüchse und Abb. 2 eine Aufsicht.Fig. I is a section along the line A-B of Fig. 2 through a with The filter canister loaded with the new HEPA filter and Fig. 2 is a top view.

Die Falten der als endloses Band ausgebildeten Schwebstoffilterschicht b verlaufen in paralleler ZickzackfaItung und schließen spitze Winkel miteinander ein. Das Schwebstoffilter liegt mit seinen Stirnkanten zwischeu den Abdeckplatten:e und f, von denen die gleichzeitig den Deckel der Büchse a bildende Plattee mit einem Lufteintrittsschlitz g versehen ist, der zugleich die einzige öffnung im Hohlkörper des Schwebstoffilters bildet. Mit c ist die gasbindende Schicht und mit d das Anschlußgewinde bezeichnet.The folds of the suspended matter filter layer formed as an endless belt b run in parallel zigzag folds and close acute angles with one another a. The front edge of the HEPA filter lies between the cover plates: e and f, of which the plate simultaneously forming the lid of the can a with a Air inlet slot g is provided, which is also the only opening in the hollow body of the particulate filter forms. With c is the gas-binding layer and with d the connection thread designated.

Abb.3 zeigt eine Ausführungsform, bei der der Lufteintrittsschlitz,al symmetrisch in der Mitte des in zwei Gruppenbi und b,2 aufgeteilten Faltenkörpers liegt.Fig.3 shows an embodiment in which the air inlet slot, al symmetrically in the middle of the body of the folds, which is divided into two groups bi and b, 2 lies.

Abb. q., die eine perspektivische Ansicht des Filterquerschnitts ist, zeigt die gleiche Grundrißanordnung wie Abb. 2, jedoch ist die Lufteintrittsöffnun.g-u" seitlich angeordnet.Fig.q., Which is a perspective view of the filter cross-section, shows the same layout as Fig. 2, but the Lufteintrittsöffnun.g-u " arranged laterally.

Abb. 5 zeigt eine Ausführungsform, bei der das gefaltete Schwebstoffilterband in vier Gruppen b3, b4, b" und b6 aufgeteilt ist. Der Lufteintrittsschlitz liegt in der Mitte.Fig. 5 shows an embodiment in which the folded particulate filter belt is divided into four groups b3, b4, b "and b6. The air inlet slot is in the middle.

Abb. 6 und 7 zeigen Längsschnitte, aus denen ersichtlich ist, daß auch der unter dem Lufteintrittsschlitzg3 liegende, zwischen den Faltenkanten ausgesparte Hohlraum dadurch auf ein Minimum beschränkt werden kann. daß er sich vom Lufteintrittsschlitz bis zur gegenüberliegenden Abdeckplatte verjüngt. Die Anordnung des gefalteten Scbwebstofffilterbandes entspricht im übrigen der bei der Ausführungsform nach Ahb.3 gewählten.Figs. 6 and 7 show longitudinal sections from which it can be seen that also the one under the air inlet slotg3, which is cut out between the fold edges This allows cavity to be kept to a minimum. that it is away from the air inlet slot tapered to the opposite cover plate. The arrangement of the folded woven fabric filter belt otherwise corresponds to that selected in the embodiment according to Fig. 3.

Claims (1)

PATENTANSPRUCH: Schwebsto-ffilter für Atemschutzgeräte, dessen als endloses Band ausgebildete Filterschicht in parallel zur Achse des Filtergehäuses verlaufende Falten gelegt und das mit seinen Stirnkanten zwischen zwei Abdeckplatten angeordnet ist, von denen die eine mit einer Lufte nlaß- oder Luftauslaßöffnung versehen ist, dadurch gekennzeichnet, daß die Falten des Filters in paralleler Zickzackfaltung verlaufen und spitze Winkel miteinander einschließen.PATENT CLAIM: Particle filter for respiratory protective devices, its as endless belt formed filter layer in parallel to the axis of the filter housing running folds placed and that with its front edges between two cover plates is arranged, one of which with an air inlet or air outlet opening is provided, characterized in that the folds of the filter in parallel zigzag folds run and include acute angles with each other.
DEA69790D 1933-06-20 1933-06-20 HEPA filter for breathing apparatus Expired DE728602C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA69790D DE728602C (en) 1933-06-20 1933-06-20 HEPA filter for breathing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA69790D DE728602C (en) 1933-06-20 1933-06-20 HEPA filter for breathing apparatus

Publications (1)

Publication Number Publication Date
DE728602C true DE728602C (en) 1942-11-30

Family

ID=6945076

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA69790D Expired DE728602C (en) 1933-06-20 1933-06-20 HEPA filter for breathing apparatus

Country Status (1)

Country Link
DE (1) DE728602C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4640779A (en) * 1983-10-18 1987-02-03 Nippondenso Co., Ltd. Filter element

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4640779A (en) * 1983-10-18 1987-02-03 Nippondenso Co., Ltd. Filter element

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