CN115445112A - Carbon dioxide absorbing device and breathing equipment - Google Patents
Carbon dioxide absorbing device and breathing equipment Download PDFInfo
- Publication number
- CN115445112A CN115445112A CN202210962792.5A CN202210962792A CN115445112A CN 115445112 A CN115445112 A CN 115445112A CN 202210962792 A CN202210962792 A CN 202210962792A CN 115445112 A CN115445112 A CN 115445112A
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- carbon dioxide
- fixing
- filter plate
- fixed frame
- fixed
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B7/00—Respiratory apparatus
- A62B7/10—Respiratory apparatus with filter elements
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B15/00—Installations affording protection against poisonous or injurious substances, e.g. with separate breathing apparatus
-
- 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
- A62B23/00—Filters for breathing-protection purposes
- A62B23/02—Filters for breathing-protection purposes for respirators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Pulmonology (AREA)
- Toxicology (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
The present application relates to a carbon dioxide absorption device and a breathing apparatus, the device comprising: the carbon dioxide absorption assembly comprises a fixed frame, a carbon dioxide adsorbent is placed in the fixed frame, a first filter plate and a second filter plate are arranged on the opposite side of the fixed frame, the fixed frame is arranged in the fixed frame, the filter plates correspond to the air inlet channels, the second filter plates correspond to the air outlet channels, so that carbon dioxide gas and oxygen gas enter the fixed frame through the first filter plates from the air inlet channels, the carbon dioxide gas is absorbed by the carbon dioxide adsorbent, the oxygen gas flows out from the air outlet channels through the second filter plates, therefore, the functional modules connected with the air bags do not need to be detached, and the agents are directly filled into the fixed frame, so that the assembly process of the carbon dioxide absorption assembly is simple.
Description
Technical Field
The application relates to the field of breathing equipment, in particular to a carbon dioxide absorption device and breathing equipment.
Background
At present, industries such as coal, fire control, chemical industry can produce a large amount of carbon dioxide in the course of the work, and the staff need wear the respirator, and the respirator can absorb the carbon dioxide, avoids the human body to inhale the concentration of carbon dioxide and leads to the human body uncomfortable, and wherein, the respirator includes carbon dioxide absorbing device, and carbon dioxide absorbing device absorbs the carbon dioxide promptly, and its main effect is the carbon dioxide gas who absorbs entering the respirator, is whole respirator indispensable partly.
At present, most of design schemes for carbon dioxide absorption devices of positive pressure oxygen respirators in the market are designed based on carbon dioxide absorption tanks of Germany PSS BG4 compressed oxygen respirators, and the tank body is oval in shape and suitable in height, so that the carbon dioxide can be fully absorbed during breathing, and the concentration of the carbon dioxide is greatly reduced during inspiration. However, the carbon dioxide absorption tank is required to be taken out from the positive pressure oxygen respirator when the absorption tank is filled with medicaments every time, the functional module connected with the air bag is required to be detached, and then the rear cover and the filter plate are required to be opened to fill the medicaments, so that the assembly process is complex.
Disclosure of Invention
The application provides a carbon dioxide absorbing device and respiratory equipment to all will take out the carbon dioxide absorption jar from malleation oxygen respirator when solving the absorption jar and filling the medicament at every turn, will pull down the functional module who is connected with the gasbag, then need cover and filter open the problem that can fill the medicament, assembly process is comparatively complicated with the back.
In order to solve the above technical problems, or at least partially solve the above technical problems, the present application provides a carbon dioxide absorbing device, including: the carbon dioxide absorption assembly is arranged in the fixed shell, and the sealing cover is arranged on the fixed shell and seals the carbon dioxide absorption assembly in the fixed shell;
an air inlet channel and an air outlet channel are respectively arranged on two opposite sides of the fixed shell;
the carbon dioxide absorption assembly comprises a fixed frame, a carbon dioxide adsorbent is placed in the fixed frame, a first filter plate and a second filter plate are arranged on the opposite side of the fixed frame, the fixed frame is arranged in the fixed shell, the filter plates correspond to the air inlet channels, the second filter plate corresponds to the air outlet channels, so that carbon dioxide gas and oxygen gas enter the fixed frame through the first filter plate from the air inlet channels, the carbon dioxide gas is absorbed by the carbon dioxide adsorbent, and the oxygen gas flows out from the air outlet channels through the second filter plate.
Optionally, the diameter on the filter plate is smaller than the particle diameter of the carbon dioxide adsorbent.
Optionally, a plurality of first fixing grooves are formed in the fixing frame, and a sealing gasket is arranged on each of the plurality of first fixing grooves, so that the sealing cover and the fixing frame are sealed.
Optionally, the top edges of the first filter plate and the second filter plate are provided with convex edges, and the convex edges are used for installing and taking out the fixing frame.
Optionally, the fixing frame, the first filter plate and the second filter plate are provided with reinforcing ribs.
Optionally, be equipped with a plurality of perpendicular muscle on the fixed casing, fixed frame is equipped with fixed slot, erect the muscle with the fixed slot cooperation.
Optionally, a second fixing groove is formed in the top end face of the fixed shell, a sealing ring is arranged on the second fixing groove, and the sealing ring is in sealing fit with the sealing cover.
Optionally, the outer side wall of the fixed shell is provided with a plurality of vertical beams, the vertical beams are provided with a plurality of buckles, the sealing cover is provided with a plurality of clamping grooves, and the buckles are matched with the clamping grooves.
Optionally, the air inlet channel is disposed on one side of the fixed housing through the first fixing member, and the air outlet channel is disposed on the other side of the fixed housing through the second fixing member.
The present application further provides a breathing apparatus comprising: the carbon dioxide absorbing device of any preceding claim, and a respiratory mask, the respiratory mask is connected with the carbon dioxide absorbing device.
This application passes through the carbon dioxide absorption subassembly is including fixed frame, place the carbon dioxide adsorbent in the fixed frame, be equipped with first filter and second filter on the offside of fixed frame, fixed frame set up in the fixed casing, the filter with the air inlet passageway corresponds, the second filter with the passageway of giving vent to anger corresponds, so that carbon dioxide gas and oxygen follow the air inlet passageway passes through first filter gets into in the fixed frame, just carbon dioxide gas quilt the carbon dioxide adsorbent absorbs, oxygen passes through the second filter is followed the gas outlet passageway flows to the realization need not pull down the function module who is connected with the gasbag, directly fill the medicament to fixed frame in can for carbon dioxide absorption subassembly assembling process is comparatively simple.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic assembly diagram of a carbon dioxide absorption apparatus according to an embodiment of the present disclosure;
fig. 2 is an exploded schematic view of a carbon dioxide absorption apparatus according to an embodiment of the present disclosure;
fig. 3 is a schematic top view of a carbon dioxide absorption apparatus according to an embodiment of the present disclosure;
FIG. 4 is a schematic view of a stationary housing of a carbon dioxide absorption unit according to an embodiment of the present disclosure;
FIG. 5 is another schematic view of a fixed housing of a carbon dioxide absorbing device according to an embodiment of the present disclosure;
FIG. 6 is a schematic view of another angle of the stationary housing of a carbon dioxide absorbing device according to an embodiment of the present disclosure;
FIG. 7 is a schematic cross-sectional view of a carbon dioxide absorption apparatus according to an embodiment of the present application;
fig. 8 is a schematic view of a fixing frame of a carbon dioxide absorbing device according to an embodiment of the present application.
The following are the names and designations of the main components of the application:
A carbon dioxide absorbing component, a fixing frame 6, a first filter plate 601, a second filter plate 607, a first fixing groove 602, a sealing gasket 5, a convex edge 605 and a reinforcing rib 604;
the sealing ring comprises a fixed shell 604, an air inlet channel 104, an air outlet channel 101, a vertical rib 108, a fixed clamping groove 606, a second fixed groove 109, a sealing ring 4, a vertical beam 105, a buckle 2 and a clamping groove 301;
a carbon dioxide adsorbent.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making creative efforts shall fall within the protection scope of the present application.
As shown in fig. 1 to 8, the present application provides a carbon dioxide absorbing device including: the carbon dioxide absorption device comprises a sealing cover 3, a carbon dioxide absorption assembly and a fixed shell 604, wherein the carbon dioxide absorption assembly is arranged in the fixed shell 604, and the sealing cover 3 is arranged on the fixed shell 604 and seals the carbon dioxide absorption assembly in the fixed shell 604;
an air inlet channel 104 and an air outlet channel 101 are respectively arranged on two opposite sides of the fixed shell 604;
the carbon dioxide absorption assembly comprises a fixed frame 6, a carbon dioxide adsorbent 7 is placed in the fixed frame 6, a first filter plate 601 and a second filter plate 607 are arranged on the opposite side of the fixed frame 6, the fixed frame 6 is arranged in the fixed shell 604, the filter plates correspond to the air inlet channels 104, the second filter plate 607 corresponds to the air outlet channels, so that carbon dioxide gas and oxygen gas enter the fixed frame 6 through the first filter plate 601 from the air inlet channels 104, the carbon dioxide gas is absorbed by the carbon dioxide adsorbent 7, and the oxygen gas flows out from the air outlet channels 101 through the second filter plate 607. Thereby realize need not pull down the functional module of being connected with the gasbag, directly fill the medicament to fixed frame 6 in can for carbon dioxide absorbs the subassembly assembling process comparatively simply.
Optionally, the diameter on the filter plate is smaller than the particle diameter of the carbon dioxide adsorbent 7. In order to enable the carbon dioxide adsorbent 7 to fully react with carbon dioxide in the fixing frame 6, particles of the carbon dioxide adsorbent 7 cannot enter the fixing housing 604, that is, the diameter of the filter holes on the filter plate is directly smaller than the diameter of the particles of the carbon dioxide adsorbent 7, so that the particles of the carbon dioxide adsorbent 7 cannot leak.
In one embodiment, the fixing frame 6 is provided with a plurality of first fixing grooves 602, and a sealing gasket 5 is disposed on each of the plurality of first fixing grooves 602 to seal between the sealing cover 3 and the fixing frame 6. Thereby make through sealed 5 that makes carbon dioxide adsorbent 7 fully react with carbon dioxide in fixed frame 6, guarantee the absorptive leakproofness of whole fixed frame 6, further, different sizes's sealed 5 that seal up with gum is pasted respectively to each first fixed slot 602, and the purpose guarantees that the gas that gets into carbon dioxide adsorbent 7 and feeds fixed frame 6 can not reveal from the top and the side of the jar body, and then has guaranteed the gas tightness of overall structure.
In one embodiment, the top edges of the first filter plate 601 and the second filter plate 607 are provided with a protruding edge 605, and the protruding edge 605 is used for installing and removing the fixing frame 6. Through protruding edge 605 on first filter 601 and the second filter 607, thereby made things convenient for at any time with fixed frame 6 from fixed casing 604 in installation and take out, and if need add carbon dioxide adsorbent 7, can directly open sealed lid 3, place fixed frame 6 with carbon dioxide adsorbent 7 in, user's experience has been promoted, furthermore, the platform is along outwards stretching out certain length for air inlet passageway 104, the purpose is the convenience that improves the installation, the usable platform of user is followed and is taken out fixed frame 6 that charges with carbon dioxide adsorbent 7 with the instrument.
Optionally, the fixing frame 6, the first filter plate 601 and the second filter plate 607 are provided with reinforcing ribs 604. The reinforcing ribs 604 make the structure of the fixing frame 6, the first filter plate 601 and the second filter plate 607 more stable, and are not easily damaged. The carbon dioxide adsorbent 7 is fixed to the frame 6 without any gap therebetween, and the entire frame 6 has a rectangular inner cross section. Thus, after entering through the air inlet passage 104, the air flow can be distributed relatively uniformly in the whole box body, and the carbon dioxide gas can be fully contacted with the carbon dioxide adsorbent 7 and absorbed by the carbon dioxide adsorbent 7.
In an embodiment, the fixing housing 604 is provided with a plurality of vertical ribs 108, the fixing frame 6 is provided with a fixing slot 606, and the vertical ribs 108 are matched with the fixing slot 606. The position of fixed frame 6 in fixed casing 604 is injectd through perpendicular muscle 108 on the fixed casing 604 and draw-in groove 301 on the fixed frame 6 to make and be difficult for taking place to rock at the removal in-process between fixed frame 6 and the fixed casing 604, the interval between every group perpendicular muscle 108 all can be more than the fixed frame 6's that carbon dioxide adsorbent 7 loaded the board thickness of some greatly, ensures that its installation targets in place.
Optionally, a second fixing groove 109 is formed on the top end surface of the fixing housing 604, a sealing ring 4 is arranged on the second fixing groove 109, and the sealing ring 4 is in sealing fit with the sealing cover 3. The stationary housing 604 and the sealing cap 3 are sealed by the sealing ring 4, so that the carbon dioxide gas does not leak and the carbon dioxide gas does not enter the stationary housing 604 from the outside.
Optionally, a plurality of vertical beams 105 are arranged on the outer side wall of the fixed housing 604, a plurality of buckles 2 are arranged on the plurality of vertical beams 105, a plurality of clamping grooves 301 are arranged on the sealing cover 3, and the plurality of buckles 2 are matched with the plurality of clamping grooves 301. Through a plurality of buckle 2 with a plurality of thereby it makes the inseparable closing cap of sealed lid 3 on fixed casing 604 to cooperate draw-in groove 301, erects the roof beam 105 moreover and makes the structure emphasis of fixed casing 604 stronger, and difficult emergence is damaged, and fixed casing 604 structure adopts even wall thickness design, guarantees processability and intensity.
Optionally, the air inlet channel 104 is disposed on one side of the fixed housing 604 through the first fixing member by the air inlet channel 104, and the air outlet channel 101 is disposed on the other side of the fixed housing 604 through the second fixing member by the air outlet channel 101. The air inlet passage 104 and the air outlet passage 101 are fixed to the stationary case 604 by the vertical beams 105 and the horizontal beams, respectively, and the air inlet passage 104 and the air outlet passage 101 are communicated with the inside of the stationary case 604, respectively.
The present application further provides a breathing apparatus comprising: the carbon dioxide absorbing device of any preceding claim, and a respiratory mask, the respiratory mask is connected with the carbon dioxide absorbing device.
Further, the gas flow of the gas inlet passage 104 enters the fixed frame 6 through the first filter plate 601 of the fixed frame 6 charged with the carbon dioxide adsorbent 7, sufficiently contacts the carbon dioxide adsorbent 7 in the fixed frame 6, and then flows out from the gas outlet passage 101 through the first filter plate 601 on the other side.
As shown in fig. 1 and 2, the handling and collecting features of the carbon dioxide adsorbent 7 charging frame 6 and the mounting steps thereof will be described in detail.
Step 1: pulling down the buckle 2 and opening the sealing cover 3;
step 2: taking out the whole carbon dioxide adsorbent 7 charging fixing frame 6 from the sealing cover 3;
and 3, step 3: pouring the carbon dioxide adsorbent 7 into a carbon dioxide adsorbent 7 charging and fixing frame 6;
and 4, step 4: charging the sealing cover 3 with the carbon dioxide adsorbent 7 into the fixed housing 604;
and 5: and (3) covering the sealing cover 3, and connecting the inside of the fixed shell 604 with the sealing cover 3 by the buckle 2 and the screw to finish the installation.
It can be seen from whole assembly steps that the carbon dioxide absorption subassembly is placed inside fixed casing 604 alright realize filling, need not dismantle with other functional module of carbon dioxide absorption subassembly moreover, and is simple and convenient, has realized filling fast of carbon dioxide absorption subassembly, has effectively improved first-aid staff's work efficiency, compares in PSS or PG 4's carbon dioxide absorbing fixed frame 6 and has reduced the part simultaneously, and assembly processing is more simple.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A carbon dioxide absorbing apparatus, comprising: the carbon dioxide absorption assembly is arranged in the fixed shell, and the sealing cover is arranged on the fixed shell and seals the carbon dioxide absorption assembly in the fixed shell;
an air inlet channel and an air outlet channel are respectively arranged on two opposite sides of the fixed shell;
the carbon dioxide absorption assembly comprises a fixed frame, a carbon dioxide adsorbent is placed in the fixed frame, a first filter plate and a second filter plate are arranged on the opposite side of the fixed frame, the fixed frame is arranged in the fixed shell, the filter plates correspond to the air inlet channels, the second filter plate corresponds to the air outlet channels, so that carbon dioxide gas and oxygen gas enter the fixed frame through the first filter plate from the air inlet channels, the carbon dioxide gas is absorbed by the carbon dioxide adsorbent, and the oxygen gas flows out from the air outlet channels through the second filter plate.
2. The carbon dioxide absorbing apparatus according to claim 1, wherein the diameter of the filter plate is smaller than the particle diameter of the carbon dioxide adsorbent.
3. The carbon dioxide absorbing apparatus as claimed in claim 1, wherein the fixing frame is provided with a plurality of first fixing grooves, and a sealing gasket is provided at each of the plurality of first fixing grooves to seal between the sealing cover and the fixing frame.
4. The carbon dioxide absorbing apparatus as set forth in claim 1, wherein the first filter plate and the second filter plate are each provided with a protruding edge on a top end edge thereof, the protruding edges being used for installation and removal of the fixing frame.
5. The carbon dioxide absorbing apparatus according to claim 1, wherein the fixing frame, the first filter plate, and the second filter plate are provided with reinforcing ribs.
6. The carbon dioxide absorbing device as claimed in claim 1, wherein the fixing housing is provided with a plurality of vertical ribs, the fixing frame is provided with fixing slots, and the vertical ribs are engaged with the fixing slots.
7. The carbon dioxide absorbing device as recited in claim 1, wherein a second fixing groove is formed on a top end surface of the fixing housing, and a sealing ring is provided on the second fixing groove and is in sealing engagement with the sealing cover.
8. The carbon dioxide absorbing device as claimed in claim 7, wherein a plurality of vertical beams are disposed on an outer side wall of the fixed housing, a plurality of fasteners are disposed on the plurality of vertical beams, a plurality of engaging grooves are disposed on the sealing cover, and the plurality of fasteners are engaged with the plurality of engaging grooves.
9. The carbon dioxide absorbing device as recited in claim 1, further comprising a first fixing member and a second fixing member, the air inlet passage being disposed on one side of the stationary housing through the first fixing member, the air outlet passage being disposed on the other side of the stationary housing through the second fixing member.
10. A breathing apparatus, comprising: a carbon dioxide absorbing device according to any one of claims 1 to 9, and a breathing mask connected to the carbon dioxide absorbing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210962792.5A CN115445112A (en) | 2022-08-11 | 2022-08-11 | Carbon dioxide absorbing device and breathing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210962792.5A CN115445112A (en) | 2022-08-11 | 2022-08-11 | Carbon dioxide absorbing device and breathing equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115445112A true CN115445112A (en) | 2022-12-09 |
Family
ID=84297827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210962792.5A Pending CN115445112A (en) | 2022-08-11 | 2022-08-11 | Carbon dioxide absorbing device and breathing equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115445112A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1003647A (en) * | 1962-11-13 | 1965-09-08 | Siebe Gorman & Co Ltd | Improvements in or relating to breathing apparatus |
| GB2114450A (en) * | 1982-01-30 | 1983-08-24 | Draegerwerk Ag | Respiratory apparatus |
| US5052385A (en) * | 1986-10-30 | 1991-10-01 | Sundstrom Safety Ab | Filter container for an absorption filter and a particle filter, for direct or indirect connection to a protective mask |
| US5062874A (en) * | 1990-06-05 | 1991-11-05 | Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of National Defence Of Her Majesty's Canadian Government | Filter sealing apparatus |
| CN102228732A (en) * | 2011-03-17 | 2011-11-02 | 重庆安仪煤矿设备有限公司 | Carbon dioxide absorbing device for isolation-type positive-pressure oxygen respirator |
| CN103111027A (en) * | 2013-02-04 | 2013-05-22 | 抚顺中煤科工安全仪器有限公司 | Carbon dioxide absorption pot of compressed oxygen self-rescuer and processing method |
| CN110523016A (en) * | 2018-05-24 | 2019-12-03 | 天津市卓锐安全防护用品有限公司 | A kind of efficient active carbon filter cartridge |
-
2022
- 2022-08-11 CN CN202210962792.5A patent/CN115445112A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1003647A (en) * | 1962-11-13 | 1965-09-08 | Siebe Gorman & Co Ltd | Improvements in or relating to breathing apparatus |
| GB2114450A (en) * | 1982-01-30 | 1983-08-24 | Draegerwerk Ag | Respiratory apparatus |
| US5052385A (en) * | 1986-10-30 | 1991-10-01 | Sundstrom Safety Ab | Filter container for an absorption filter and a particle filter, for direct or indirect connection to a protective mask |
| US5062874A (en) * | 1990-06-05 | 1991-11-05 | Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of National Defence Of Her Majesty's Canadian Government | Filter sealing apparatus |
| US5062874B1 (en) * | 1990-06-05 | 1998-07-28 | Canada Minister Defence | Filter sealing apparatus |
| CN102228732A (en) * | 2011-03-17 | 2011-11-02 | 重庆安仪煤矿设备有限公司 | Carbon dioxide absorbing device for isolation-type positive-pressure oxygen respirator |
| CN103111027A (en) * | 2013-02-04 | 2013-05-22 | 抚顺中煤科工安全仪器有限公司 | Carbon dioxide absorption pot of compressed oxygen self-rescuer and processing method |
| CN110523016A (en) * | 2018-05-24 | 2019-12-03 | 天津市卓锐安全防护用品有限公司 | A kind of efficient active carbon filter cartridge |
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