EP3675969A1 - Masque de protection respiratoire et boîtier de filtre pour un masque de protection respiratoire - Google Patents

Masque de protection respiratoire et boîtier de filtre pour un masque de protection respiratoire

Info

Publication number
EP3675969A1
EP3675969A1 EP19724329.8A EP19724329A EP3675969A1 EP 3675969 A1 EP3675969 A1 EP 3675969A1 EP 19724329 A EP19724329 A EP 19724329A EP 3675969 A1 EP3675969 A1 EP 3675969A1
Authority
EP
European Patent Office
Prior art keywords
filter
impact
impact element
opening
longitudinal webs
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.)
Pending
Application number
EP19724329.8A
Other languages
German (de)
English (en)
Inventor
Sandra Dankert
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.)
Draeger Safety AG and Co KGaA
Original Assignee
Draeger Safety 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 Draeger Safety AG and Co KGaA filed Critical Draeger Safety AG and Co KGaA
Publication of EP3675969A1 publication Critical patent/EP3675969A1/fr
Pending legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B19/00—Cartridges with absorbing substances for respiratory apparatus
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
    • A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
    • A62B18/02—Masks
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B23/00—Filters for breathing-protection purposes
    • A62B23/02—Filters for breathing-protection purposes for respirators

Definitions

  • the invention relates to a filter holder, which is able to accommodate at least one filter unit.
  • the filter holder and the recorded filter unit belong to a respirator.
  • Such a respirator allows a user to be in and work in such an environment where the ambient air is contaminated by droplets and / or particulates and / or harmful gases.
  • the or each filter unit of the respirator filters pollutants from the
  • the user is therefore supplied with purified ambient air. It is not necessary for the user to carry his own source of breathing air, for example an oxygen cylinder.
  • the respirator can be used for example in a painting line or in a mine or on a construction site or for rescue in case of fire.
  • the filter housing 7 of DE 93001811 U1 has on one input side a front plate 22 with a plurality of air inlet openings 23. Behind the front plate 22 a plurality of baffles 24 are arranged, each baffle plate 24 is disposed behind each of an air inlet opening 23. Fluid passing through the
  • the flameproof filter housing a of DE 734496 receives a filter d and has an inlet opening in the form of an inlet nozzle b. Seen in the direction of entry behind the inlet b are consecutively more
  • FIG. 6 of WO 2017/004313 A1 shows a respiratory mask (respirator 300) with two filter housings (filter cartridge housings 60), each of which receives a filter cartridge 1.
  • Each filter housing 60 has a front side (front side 61) and a rear side (rear side 62).
  • a second housing portion 65 on the back 62 has a portion 63 with multiple air passages and is openable and closable relative to the remainder of the filter housing (first housing portion 64).
  • a portion 56 of the remainder 64 has an area 52 with a plurality of openings and pushes the filter cartridge 1 into a receiving structure 66, see Figure 9 and Figure 11.
  • the openings in the areas 63 and 52 can be
  • the invention has for its object to provide a filter receptacle for receiving a filter element for a respirator, which protects the recorded filter element against contamination and is simpler than known filter receptacles, which include protection against contamination built.
  • the filter holder according to the invention can accommodate at least one filter element, wherein the filter holder and this filter element to a
  • An inlet side of the filter holder points towards the inflowing fluid.
  • the filter holder comprises at least two flat
  • Impact elements These two or at least two impact elements are arranged parallel to one another and at a distance from one another. Seen in an inflow direction of incoming fluid, the two impact elements are arranged one behind the other, so that a front and a rear impact element is formed. The or each received filter element is arranged behind the rear impact element and thus behind both impact elements.
  • Each impact element comprises in each case a plurality of longitudinal webs. Between each two adjacent longitudinal webs of an impact element at least one opening is formed. This opening is permeable to incoming fluid.
  • each opening in the front impact element is laterally offset relative to each opening in the or at least one rear impact element.
  • “Lateral offset” means that in the inflow direction a longitudinal web faces an opening and / or an opening follows a longitudinal ridge.
  • This fluid channel passes through an opening in the front impact element and through a laterally offset opening in the rear impact element.
  • Filter element can clean the ambient air.
  • a user can provide himself with purified breath due to his own breathing effort. Not required thanks to a respirator with the filter unit that a
  • Paint spray, dust particles or other coarse particles If these solid and liquid particles reach a received filter element, so they contribute to contamination of the filter element. This will increase the ability of the Filter element for filtration reduced. In addition, the respiratory resistance that the wearer of the respirator has to overcome increases.
  • This pre-filter filters out solid and liquid particles from the incoming ambient air. Thanks to the pre-filter, the or each actual filter element, which is seen arranged in the inflow direction behind the pre-filter, longer use.
  • a disadvantage of such a prefilter is that the filter holder must then additionally have a receptacle for the prefilter.
  • the pre-filter must be replaced relatively frequently, which leads to a reduced availability due to the necessary breaks in the operating time. A user must carry several prefilters with them.
  • the invention achieves the advantage of at least partially protecting a picked-up filter element from solid and liquid particles without requiring a separate pre-filter. Rather, the at least two impact elements with the laterally offset openings themselves act as prefilters. Because no prefilter must be replaced, the availability of a respirator increases with a filter housing according to the invention. However, the invention can also be used in combination with a separate prefilter.
  • a prefilter increases the resistance to breathing and the weight of the filter intake, especially if the pre-filter absorbs or otherwise absorbs particles.
  • the invention also avoids these disadvantages. Another advantage of a filter according to the invention without pre-filter compared to a
  • Filter intake with pre-filter is that a filter intake without pre-filter can be easier to produce. Because when Fier ein a filter holder according to the invention, it is not necessary to mount a receptacle for a pre-filter. A solid or liquid particle, which flows together with the ambient air from the input side into the interior of the filter holder according to the invention, can not impinge straight on a recorded filter element. Rather, this particle is deflected laterally thanks to the laterally offset openings and the or a curved inflow channel. As a result, in many cases the particle either sticks or sticks to a longitudinal web or to another constituent part of the filter receptacle or is reflected back outwards by the filter receptacle. In the other cases, the particle is at least deflected and impinges on the filter element with reduced kinetic energy.
  • the filter holder itself acts as a first separation stage for liquid and solid particles.
  • the invention provides several degrees of freedom to adapt the filter mount to a given requirement.
  • the width of a longitudinal web, the width of an opening, the lateral offset between the front and rear openings and the distance between the front and the rear impact element can be changed so that on the one hand the breathing resistance remains as low as possible and on the other hand as few
  • Particles can impinge on a recorded filter element.
  • the distance between the front and the rear impact element between 1, 5 mm and 2.5 mm.
  • the distance between two longitudinal webs and thus the width of an opening between these two longitudinal webs is preferably between 2 mm and 3 mm.
  • each opening of the rear impact element is arranged behind a longitudinal web of the front impact element. Thanks to the lateral offset and in particular this preferred embodiment, no straight fluid channel is formed from the outside to a recorded filter element. Rather, each fluid channel is bent at least once, so that inflowing ambient air is deflected and preferably vortexed. This embodiment further reduces the risk that an inflowing particle reaches the received filter element.
  • each impact element comprises a plurality of longitudinal webs.
  • at least one impact element comprises a plurality of transverse webs. These transverse webs are perpendicular or oblique on the longitudinal webs of this impact element.
  • the transverse webs and the longitudinal webs of this impact element lie in a plane or surface, so that a lattice structure is formed.
  • the transverse webs of this impact element are mechanically connected to one longitudinal web of the or another impact element. This embodiment leads to a particularly high mechanical stability of the filter holder. The risk is reduced that an externally applied mechanical load leads to damage or even breakage of the outer impact element.
  • the filter holder comprises in addition to the at least two
  • Impact elements a circumferential wall. This peripheral wall surrounds a portion with the two impact elements and a received filter element, preferably completely.
  • the circumferential wall is firmly connected to at least one impact element, preferably with both
  • the peripheral wall and the two impact elements together at least partially enclose a space in which a
  • Filter element is received or receivable.
  • the circumferential wall and a portion with the two impact elements are integrally formed, which further increases the mechanical stability.
  • these components are even designed monolithic, ie they are made in manufacturing in a single process step.
  • the process step includes, for example, injection molding or casting.
  • This embodiment leads to a rapid and cost-effective production.
  • Various geometric shapes of the longitudinal webs and thus the openings are possible, wherein the filter holder according to the invention may also have a combination of a plurality of geometric shapes. By selecting a desired geometric shape, the filter receptacle can be adapted to an intended use condition.
  • the filter receptacle according to the invention belongs to a filter housing.
  • This filter housing further comprises a counter element, which is firmly connected to the filter holder according to the invention.
  • the filter holder and the counter element together enclose a fluid-tight space.
  • at least one filter element is added or can be recorded.
  • the filter element is firmly connected to the filter holder, for example by means of a mounting foam or other adhesive bond or by adhesive welding.
  • a filter unit comprises a filter housing with an inventive
  • a respirator includes one
  • Mask body and at least one filter unit with a filter receptacle according to the invention can be applied to the face of a wearer.
  • the or each filter unit of the respirator is in fluid communication with the interior of the mask body.
  • Figure 1 shows a respirator with a mask body and two
  • Figure 2 is a sectional view of a filter according to the invention
  • Figure 3 in a perspective view of a first embodiment of a
  • Figure 5 is a sectional view of the second embodiment of Figure 4.
  • Figure 6 is a perspective view of a third embodiment of a
  • Figure 7 is a perspective view of a fourth embodiment of a
  • Figure 8 is a sectional view of the fourth embodiment of Figure 7;
  • Figure 9 is a perspective view of a fifth embodiment of a filter holder;
  • FIG. 1 shows a respiratory mask 10, which is configured as a full mask and comprises a mask body 12, which can be positioned on the face of a wearer and is held on the head by straps not shown.
  • a respirator according to the invention 10 can also be used as a Flalbmaske or
  • Embellished quarter mask Thanks to the respirator 10, a user can be in a polluted environment without a separate one
  • the respirator 10 filters
  • the respirator 10 of Figure 1 further comprises a centrally disposed filter unit 15 and two laterally arranged filter units 13.
  • Each filter unit 13, 15 each comprise a filter receptacle 16 and a counter element 17.
  • the filter receptacle 16 and the counter element 17 are firmly and fluid-tightly interconnected, for example by a welded joint, and together form a filter housing, which encloses an interior, in which at least one filter element 14 is accommodated.
  • This filter element 14 is shown in FIG. 2 and is designed, for example, as a particle filter or coarse dust filter.
  • the filter element 14 is fixedly mounted in the interior of the filter holder 16, for example by means of mounting foam or another adhesive connection.
  • the filter unit 13 can therefore as a
  • Particle filter may be formed, which protects against particles in solid form and in liquid form (droplets) and protects against splashes of liquid particles.
  • the filter unit 13 can also be designed as a combination filter, which also protects against particles in solid and liquid form and additionally against vapors and gases.
  • Each laterally arranged filter unit 13 is fastened to the mask body 12, for example by means of a respective bayonet closure.
  • Bayonet closure is preferably arranged in the counter element 17.
  • the centrally arranged filter unit 15 is likewise fastened to the mask body 12 by means of a bayonet closure or, for example, by means of a screw cap.
  • the three filter units 13, 15 are in fluid communication with the interior of the mask body 12.
  • FIGS. 2 to 10 show different embodiments of a single filter receptacle 16 according to the invention. This belongs to a filter unit 13, 15.
  • front and rear impact element refer to the inflow direction E.
  • the impact elements 22 and 24 are arranged one behind the other as seen in the inflow direction E. It is also possible that more than two impact elements are arranged one behind the other.
  • the front impact element 22 comprises a plurality of front longitudinal webs 26. 1 which extend in each case in a longitudinal direction which is perpendicular to the plane of the drawing of FIG. 2 and is arranged horizontally in the plane of the drawing of FIG. 4 and FIG.
  • the rear impact element 24 includes a plurality of rear longitudinal webs 26.2, which are arranged parallel to the front longitudinal webs 26.1. Between two adjacent front longitudinal webs 26.1, a slot-shaped opening ⁇ 1 is formed in each case, between two adjacent rear longitudinal webs 26.2 each have a slot-shaped opening ⁇ 2.
  • the openings ⁇ 1 of the front impact element 22 are relative to the openings ⁇ 2 of rear impact element 24 laterally offset, which is clearly visible in the sectional view of Figure 2.
  • Each fluid channel F1 comprises a respective fluid channel F1, which is bent relative to the rear openings ⁇ 2 thanks to the lateral offset of the front openings ⁇ 1.
  • Each fluid channel F1,... Directs an air flow, which flows in from the inlet side 18, at least once. This diversion leads to turbulent turbulence in the flow of incoming ambient air.
  • the longitudinal webs 26.1 of the front impact element 22 are offset laterally relative to the longitudinal webs 26.2 of the rear impact element 24.
  • a viewing direction parallel to the inflow direction E is located behind each front opening ⁇ 1 each have a rear longitudinal web 26.2, but no rear opening ⁇ 2.
  • a droplet or particle either strikes a front longitudinal web 26.1 or passes through a front opening ⁇ 1 and then strikes a rear longitudinal web 26.2. In any event, the droplet or particle strikes a longitudinal ridge 26.1 or 26.2 - or an area outside the openings ⁇ 1, ⁇ 2. In many cases, the droplet or particle will stick or stick to this longitudinal web 26.1 or 26.2 or will be reflected. In any case, the
  • Moving speed of the droplet or particle is reduced so that droplets or particles do not impinge on the filter unit 13 at all or only with reduced speed.
  • the front impact element 22 is fixedly connected to the peripheral wall 29, see. FIG. 2.
  • the rear impact element 24 is firmly connected to the front impact element 22.
  • Impact elements 22, 24 are connected directly to the wall 29.
  • the impact elements 22 and 24 and the wall 29 as a single component, that is integrally formed, more preferably even monolithic, ie this one component 22, 24, 29 is produced in a single process step, for example by injection molding.
  • the longitudinal webs 26.1, 26.2 and thus the resulting openings ⁇ 1, ⁇ 2 may have different shapes.
  • each front longitudinal bar 26. 1 has the shape of a bar
  • each rear longitudinal bar 26. 2 (not shown in FIG. 3) also has the shape of a bar.
  • the filter receiver 16 of the first embodiment has a circular shape, and each impact element 22, 24 extends in a plane.
  • the filter holder of the second embodiment which is shown in Figure 4 and Figure 5, has an oval and tapered shape. This embodiment is particularly well adapted to the shape of the face of a wearer.
  • Figure 4 shows the second embodiment in a viewing direction, which is opposite to the inflow direction E, d. H. the inflow direction E is perpendicular to the
  • Figure 5 shows the second embodiment in a
  • Sectional view, and the inflow direction E lies in the plane of Figure 5.
  • the two impact elements 22, 24 are curved outward.
  • the filter unit is better located in the flank of a user than a user
  • the curved longitudinal webs 26.1, 26.2 are also rod-shaped, but not parallel to each other. Rather, two adjacent longitudinal webs 26.1 or 26.2 include an acute angle of preferably less than 10 ° between them.
  • the rear impact element 24 comprises in addition to the longitudinal webs 26.2 a plurality of transverse webs 27.2, which are fixedly connected to the rear longitudinal webs 26.2, so that a grid structure is formed.
  • a plurality of mechanical connecting elements 28 connect the transverse webs 27.2 with the front longitudinal webs 26.1 and extend parallel to
  • Inlet direction E As viewed in the direction of view of Figure 4, the front impact element 22 is disposed behind the rear impact element 24, and the front openings ⁇ 1 and the filter element 14 are indicated by dashed lines. This embodiment leads to a particularly high mechanical stability.
  • the front impact element 22 comprises several, in addition to the front longitudinal webs 26 Crossbars 27.1.
  • the front openings ⁇ 1 thereby form a matrix structure with rows and columns.
  • the rear impact element 24, which in the illustration of FIG. 6 is concealed by the front impact element 22, can likewise have a matrix structure with rows and columns or have a different structure.
  • FIG. 7 and Figure 8 show a fourth embodiment, in which the front
  • the rear impact element 24 may also have longitudinal webs radiating from a central point or have a different structure.
  • the front longitudinal webs 26.1 have the shape of circles or circle segments. These circles or circle segments are arranged concentrically around the midpoint M.
  • the back longitudinal webs 26.1 have the shape of circles or circle segments. These circles or circle segments are arranged concentrically around the midpoint M.
  • Impact element 24 may also have such circles or circle segments or have a different structure.
  • the filter holder 16 in turn has an oval shape, which tapers in one direction.
  • the front longitudinal webs 26.1 and the front openings ⁇ 1 formed thereby are in turn bar-shaped.
  • Several longitudinal webs 26.1 are arranged parallel to each other, more

Landscapes

  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Abstract

L'invention concerne un logement (16) de filtre destiné à loger un élément filtre (14) pour un appareil de protection respiratoire. Sur un côté d'entrée (18), le logement (16) de filtre comprend deux éléments d'impact (22, 24) plans, qui sont disposés parallèlement l'un à l'autre et à distance l'un de l'autre et les deux sont positionnés devant un élément filtre (14) logé. Chaque élément d'impact (22, 24) comprend respectivement plusieurs entretoises longitudinales (26.1, 26.2), entre lesquelles est formée respectivement une ouverture (Ö1, Ö2). Chaque ouverture (Ö1) dans l'un des éléments d'impact (22) est ménagée de manière latéralement décalée de chaque ouverture (Ö2) dans l'autre élément d'impact (24), de sorte qu'au moins un canal de fluide (F1,...) courbé est formé.
EP19724329.8A 2018-06-06 2019-05-14 Masque de protection respiratoire et boîtier de filtre pour un masque de protection respiratoire Pending EP3675969A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018004469 2018-06-06
PCT/EP2019/062253 WO2019233708A1 (fr) 2018-06-06 2019-05-14 Masque de protection respiratoire et boîtier de filtre pour un masque de protection respiratoire

Publications (1)

Publication Number Publication Date
EP3675969A1 true EP3675969A1 (fr) 2020-07-08

Family

ID=66554390

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19724329.8A Pending EP3675969A1 (fr) 2018-06-06 2019-05-14 Masque de protection respiratoire et boîtier de filtre pour un masque de protection respiratoire

Country Status (3)

Country Link
EP (1) EP3675969A1 (fr)
CN (1) CN112203727A (fr)
WO (1) WO2019233708A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022113700A1 (de) 2022-05-31 2023-11-30 Dräger Safety AG & Co. KGaA Ventilanordnung für eine Atemschutzmaske

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3928839A3 (fr) 2020-06-02 2022-03-16 Dräger Safety AG & Co. KGaA Unité de filtre dotée d'un filtre rigide et d'une gaine flexible, ainsi que procédé de fabrication d'un tel filtre

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DE734496C (de) 1940-05-24 1943-04-16 Versuchsanstalt Fuer Luftfahrt Vorrichtung zum Ausscheiden von Fremdbestandteilen aus der Luft, insbesondere fuer die Atemluftversorgung
DE9300181U1 (de) 1993-01-08 1993-03-04 Moldex-Metric AG & Co. KG, 7401 Walddorf Atemschutz-Halbmaske
US20050205483A1 (en) * 2004-03-22 2005-09-22 Birmingham Joseph G Microimpactor system for collection of particles from a fluid stream
US20080190887A1 (en) * 2007-02-08 2008-08-14 Kleo Kwok Manufacture filtration elements
EP3858411B1 (fr) * 2007-08-24 2024-05-29 ResMed Pty Ltd Ventilation de masque
CN109646773B (zh) * 2009-08-11 2021-10-29 瑞思迈发动机及马达技术股份有限公司 单级轴对称鼓风机和便携式通风机
KR101777866B1 (ko) * 2009-12-10 2017-09-12 야마모토 고가쿠 가부시키가이샤 마스크
DE102011051902A1 (de) * 2011-07-18 2013-01-24 Haomin Ding Filter, insbesondere Atemluftfilter
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CN107847824B (zh) 2015-06-30 2020-10-27 3M创新有限公司 包括具有以粘合方式密封边缘的端部的过滤介质的过滤器滤筒以及制造和使用方法
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022113700A1 (de) 2022-05-31 2023-11-30 Dräger Safety AG & Co. KGaA Ventilanordnung für eine Atemschutzmaske
WO2023232173A1 (fr) 2022-05-31 2023-12-07 Dräger Safety AG & Co. KGaA Agencement de soupape pour masque respiratoire

Also Published As

Publication number Publication date
CN112203727A (zh) 2021-01-08
WO2019233708A1 (fr) 2019-12-12

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