KR200411018Y1 - Oxygen generator for emergency evacuation - Google Patents

Oxygen generator for emergency evacuation Download PDF

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Publication number
KR200411018Y1
KR200411018Y1 KR2020050036527U KR20050036527U KR200411018Y1 KR 200411018 Y1 KR200411018 Y1 KR 200411018Y1 KR 2020050036527 U KR2020050036527 U KR 2020050036527U KR 20050036527 U KR20050036527 U KR 20050036527U KR 200411018 Y1 KR200411018 Y1 KR 200411018Y1
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KR
South Korea
Prior art keywords
oxygen
carbon dioxide
unit
moisture
supply
Prior art date
Application number
KR2020050036527U
Other languages
Korean (ko)
Inventor
박상길
Original Assignee
박상길
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 박상길 filed Critical 박상길
Priority to KR2020050036527U priority Critical patent/KR200411018Y1/en
Application granted granted Critical
Publication of KR200411018Y1 publication Critical patent/KR200411018Y1/en
Priority claimed from US11/482,198 external-priority patent/US7819117B2/en

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Classifications

    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62BDEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B7/00Respiratory apparatus
    • A62B7/08Respiratory apparatus containing chemicals producing oxygen
    • AHUMAN NECESSITIES
    • A41WEARING APPAREL
    • A41DOUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/05Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
    • A41D13/11Protective face masks, e.g. for surgical use, or for use in foul atmospheres
    • A41D13/1107Protective face masks, e.g. for surgical use, or for use in foul atmospheres characterised by their shape
    • A41D13/1153Protective face masks, e.g. for surgical use, or for use in foul atmospheres characterised by their shape with a hood
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62BDEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B7/00Respiratory apparatus
    • A62B7/02Respiratory apparatus with compressed oxygen or air
    • A62B7/04Respiratory apparatus with compressed oxygen or air and lung-controlled oxygen or air valves
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62BDEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B7/00Respiratory apparatus
    • A62B7/10Respiratory apparatus with filter elements

Abstract

The present invention relates to an oxygen evacuation device for emergency evacuation, which is worn on the face of the evacuator and supplies oxygen to the evacuator by the pressure difference according to the evacuation state of the evacuator, or discharges carbon dioxide and moisture through the carbon dioxide discharge pipe. A breathing unit, a carbon dioxide supply unit which is connected to a carbon dioxide discharge pipe of the breathing unit and discharges carbon dioxide and moisture discharged through a carbon dioxide supply hole at a bottom thereof, and is coupled to an upper surface of the carbon dioxide supply unit in an open state, and filled therein The oxygen generating unit for generating oxygen by the reaction of the prepared potassium peroxide (KO 2 ) and carbon dioxide, potassium peroxide and moisture, and the bottom surface is opened to the outside of the oxygen generating unit to provide the movement path of the generated oxygen The oxygen moving part and the carbon dioxide supplying part, the oxygen generating part, and the bottom of the oxygen moving part An oxygen storage unit for storing oxygen moved through the oxygen transfer unit and attached to both sides of the oxygen transfer unit to remove carbon dioxide remaining in the oxygen stored in the oxygen storage unit, and to lower the temperature and humidity to supply the breathing unit It includes a filter unit. The present invention can supply sufficient oxygen during the evacuation time to reduce the human injury, there is an effect that is easy to store and carry.

Description

Oxygen generator for emergency evacuation

1 is a block diagram of an oxygen mask using a conventional oxygen generator.

2 is a cross-sectional view of the oxygen generating device in FIG.

3 is a front perspective view of the emergency evacuation oxygen generating apparatus according to the present invention.

Figure 4 is a plan perspective view of the emergency evacuation oxygen generating apparatus according to the present invention.

5 is a state diagram used in the emergency evacuation oxygen generator according to the present invention.

* Description of the symbols for the main parts of the drawings *

100: breathing unit 110: carbon dioxide outlet pipe

111: check valve 120: oxygen supply pipe

121: check valve 210: carbon dioxide inlet

211: carbon dioxide inlet hole 220: oxygen generator

230: oxygen moving unit 240: oxygen storage unit

250: filter unit 251: carbon dioxide adsorption unit

252: moisture removal unit

The present invention relates to an emergency evacuation oxygen generating apparatus, and more particularly to an emergency evacuation oxygen generating apparatus that allows the evacuator to generate oxygen using exhaled carbon dioxide to safely evacuate in a dangerous situation such as a fire.

In general, due to an increase in the amount of synthetic polymers used in the interior decoration of buildings, toxic gases in the event of a fire often cause the victim to suffocate by poisonous gases within minutes before reaching the evacuation shelter.

In view of this, the portable oxygen mask allows the user to evacuate while receiving oxygen for a few seconds to several minutes during a fire, using compressed oxygen or a method of providing oxygen through the reaction of water and chemicals. Doing.

However, when using compressed oxygen or the reaction of water and chemicals as described above, there is a problem that the volume of the compressed oxygen cylinder is large and the volume of the bucket for storing water is large.

Conventional oxygen generators and oxygen masks using the same are described in Republic of Korea Utility Model Publication No. 20-0316831, with reference to this will be described in detail with respect to the conventional oxygen generators and oxygen mask using the same.

1 is a perspective view showing a fire retardant gas mask equipped with a conventional oxygen generator.

Hood (1) is a transparent, flame-retardant material in the upper part of the neck to provide a wide and clear view, and includes a sleepiness strap (11) around the neck to block external toxic gas inflow.

Oxygen storage bag (6) is to temporarily store the generated oxygen and to increase the respirable time by preventing the outflow of oxygen to the hood by the wearer by adjusting the amount of oxygen breathing, the oxygen swells up when the inflow is constant As a space formed by adding a flame retardant material to one surface of the hood so as to form a space, a control valve 61, a hose 62 for supplying oxygen to the respirator, and a hose 63 connected to the mixing chamber are included.

2 is a cross-sectional view of the mixing chamber, the water tank, and the small compressed air in FIG.

The mixing chamber (2) plays a key role in generating oxygen, and as a disc-shaped container (21), it prevents the lifespan reduction and performance of sodium carbonate powder and manganese dioxide powder due to moisture that may enter the mixing chamber when the gas mask is stored. In order to do this, the inside of the mixing chamber is required to be sealed without moisture.

This mixing chamber includes a sodium carbonate (Na 2 CO 3 ) powder 3 inside the vessel 21; Manganese dioxide (MnO 2 ) powder (4); A filter 22 for preventing impurities from flowing into the hose; A bundle of sealing film rupture pins 7 which is operated by a mill pin 55 coupled to the piston; A hose sealing film 23; It serves as an interface between the water tank and the mixing chamber, and features a thin sealing film 24 through which the mil pin and the inlet tube 54 can easily penetrate.

The sealing film burst pin bundle 7 is located in the space between the filter and the inlet of the hose 63, the frame 71 is coupled to the container 21 of the mixing chamber; An “L” shaped rod 73 coupled to the protruding shaft 72 of the frame and protruding a blade pin 75 at one end thereof to rupture the sealing film of the hose; It consists of the spring 74 which supported the rod so that a blade pin of normal plain might not contact the sealing film 23.

The water container 5 is filled with water 59 in the inner space formed by the cylindrical cylinder 51 and the piston 52 joined to one surface of the mixing chamber.

The bucket serves to supply water 59 which is chemically reacted with sodium carbonate and manganese dioxide into the mixing chamber and to open a sealed hose, and a piston 52; A spring 56 for advancing the piston with elastic force; A mill pin (55) coupled with the piston and operating through the seal film (24) to advance the seal film burst pin bundle when the piston is advanced; An injection pipe 54 coupled to the piston and introducing water having increased pressure when the piston is advanced into the mixing chamber; A hole 57 into which the safety pin 8 is to be inserted to fix the normal piston; The piston includes air holes 58 to prevent vacuum when advancing.

The injection tube 54 has a tip portion processed like a needle tip to easily penetrate the sealing membrane, and was provided with a perforated water inlet 541.

The small compressed air cylinder 9 is attached to the lower part of the container 21 and the water container 51 of the mixing chamber, and is worn by the wearer until oxygen generated by a chemical reaction between water and sodium carbonate powder and manganese dioxide powder is supplied to the respirator. Compression container 91 made of a light material to allow the person to breathe, and to discharge the poisonous gas and contaminated air into the hood when the hood is worn out; Safety valve bundle 92 to prevent the explosion of the compression vessel when the compressed air pressure exceeds a predetermined standard by the external temperature during storage; It consists of a hose 93 connected to the inside of the hood.

The safety valve bundle includes a valve bar 921 having a hole 9212 into which a safety pin is to be inserted and a cylinder 9211 into which a spring and a cylindrical ring are to be inserted; A spring 922 pushing the valve bar at a constant pressure; The hole 9231 for supporting the spring and for the safety pin to be inserted was formed by a cylindrical ring 923.

The operation of the safety valve bundle is that when the safety pin 8 is removed from the holes 57,9211,9231, the cylindrical ring 923 supporting the spring is retracted by the elastic force of the spring, and the valve bar is also compressed by the pressure of the compressed air. As a result, the compressed air passage is opened so that the compressed air passes through the hose 93 and flows into the hood.

And when the pressure of the compression vessel is higher than the spring elastic force in the state that the safety pin is not removed, the valve bar 921 is also reversed by the sudden increase in pressure, part of the compressed air is discharged into the hood to prevent the risk of explosion .

However, the conventional oxygen generating device and the oxygen mask using the same has a structure that removes carbon dioxide emitted through the human breathing using sodium carbonate reacting with water, and newly generates oxygen through the reaction between water and manganese dioxide. It is necessary to remove carbon dioxide through chemical reaction using water and generate oxygen. To apply to portable oxygen mask, it is necessary to carry large amount of water to generate oxygen demand which is determined by the wearable time of the oxygen mask. There was a problem to be done.

In addition, since the means for removing carbon dioxide and the oxygen generating means is separated, there is a problem that the mechanical efficiency is lowered.

And, while it is said that oxygen is generated by the reaction of manganese dioxide and water, in fact, manganese dioxide acts as a catalyst in the process of generating water and oxygen by reacting with hydrogen peroxide, and manganese dioxide is a heavy metal to be used and disposed of. There was a problem.

In addition, the oxygen generated through the chemical reaction contains heat higher than room temperature, there was a problem that it is not suitable to breathe directly.

The present invention in view of the above problems is to provide an emergency evacuation oxygen generating device that can generate oxygen during the evacuation time in an emergency without carrying water or compressed oxygen.

In addition, another object of the present invention is to provide an emergency evacuation oxygen generator that can reduce the volume of the oxygen generator using a simple structure.

The present invention for achieving the above object is worn on the face of the evacuator, breathing to supply oxygen to the evacuator by the pressure difference according to the respiratory state of the evacuator, or to breathe carbon dioxide and moisture through the carbon dioxide discharge pipe And a carbon dioxide supply unit connected to the carbon dioxide discharge pipe of the breathing unit to discharge the carbon dioxide and moisture discharged through the carbon dioxide supply hole on the bottom thereof, and the upper surface of the carbon dioxide supply unit is opened in an open state and filled therein. Oxygen generating unit for generating oxygen by the reaction of potassium peroxide (KO 2 ) and carbon dioxide, potassium peroxide and moisture, and the bottom surface is opened to the outside of the oxygen generating unit to provide a movement path of the generated oxygen The acid moving part and the carbon dioxide supply part, the oxygen generating part, and the bottom part of the oxygen moving part An oxygen storage unit for storing oxygen moved through the moving unit, and a filter attached to both sides of the oxygen moving unit to remove carbon dioxide remaining in the oxygen stored in the oxygen storage unit and lowering temperature and humidity to supply the breathing unit Contains wealth.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention configured as described above in detail as follows.

3 is a front perspective view of the emergency evacuation oxygen generating apparatus according to the present invention, Figure 4 is a plan perspective view, Figure 5 is a state of use of the present invention.

Referring to this, the emergency evacuation oxygen generating device according to the present invention is a carbon dioxide outflow pipe 110 which is a respiratory outflow path generated when the evacuator exhales and an oxygen supply pipe 120 which is an oxygen supply path when inhaling the breath. Potassium peroxide to the carbon dioxide and moisture introduced through the breathing unit 100, the carbon dioxide inlet 210 connected to the carbon dioxide outlet pipe 110 of the breathing unit 100, and the carbon dioxide inlet 210 Oxygen generator 220 for generating oxygen by reacting with (KO 2 ), and oxygen generated in the oxygen generator 220 to the oxygen storage unit 240 attached to the lower portion of the oxygen generator 220 Oxygen moving unit 230 to move, and the upper portion of the oxygen storage unit 240 and the side of the oxygen moving unit 230 to remove the unreacted carbon dioxide and absorb moisture to purify the oxygen supply pipe Supply to the breathing unit 100 through 120 Is configured to include a filter 250.

Hereinafter, the configuration and operation of the emergency evacuation oxygen mask according to the present invention as described above in more detail.

First, the carbon dioxide inlet 210, the oxygen generator 220, and the oxygen mover 230 each have a semi-cylindrical shape with different sizes, and when worn, the face side of the evacuator is flat and the outside is curved.

In addition, the semi-cylindrical filter part 250 is fastened in a state bent at a predetermined angle to both side surfaces of the oxygen moving part 230.

Such a structure can be in close contact with the present invention to the evacuator's face as a whole, it has a capacity to generate enough oxygen during the evacuation time while reducing the size.

The carbon dioxide inlet 210 receives carbon dioxide and moisture contained in the breath exhaled by the user wearing the breathing unit 100 through the carbon dioxide outlet tube 110.

The carbon dioxide outlet pipe 110 and the oxygen supply pipe 120 are provided with check valves 111 and 121 that open and close according to the pressure difference, so that the check valve 111 is opened and the check valve 121 opens when the evacuator exhales. When the inhalation is reversed, the check valve 111 may be closed and the check valve 121 may be opened.

The shape of the carbon dioxide inlet 210 is provided with a carbon dioxide inlet 211 at the lower end, the carbon dioxide inlet 211 is potassium peroxide filled in the oxygen generator 230 to a predetermined depth (KO 2 ) Buried in

The oxygen generator 230 has an open top, and is filled with potassium peroxide (KO 2 ) therein. The potassium peroxide (KO 2 ) generates oxygen (O 2 ) by reacting with carbon dioxide (CO 2 ) as shown in the following formula (1).

2CO 2 + 4KO 2- > 2K 2 CO 3 + 3O 2 + Heat

In addition, as shown in Formula 2 below, the moisture also reacts with potassium peroxide to generate oxygen.

4KO 2 + 2H 2 O-> 2KOH + 3O 2 + Heat

That is, the present invention generates oxygen by reacting the carbon dioxide and moisture of the breath exhaled by the user with potassium peroxide.

In this case, the potassium peroxide (KO 2 ) to be used is preferably a granule (granule) having a particle size of 2 to 4mm, it may further include a catalyst so that the reaction of the formula (1) and formula (2).

Oxygen generated in Formula 1 and Formula 2 has a temperature of about 40 ° C. or more, which makes it difficult for the evacuator to breathe directly.

The generated oxygen is stored in the oxygen storage unit 240 through the oxygen moving unit 230. The shape of the oxygen moving unit 230 has a semi-cylindrical structure with an open bottom, and the oxygen generated in the oxygen generator 220 moves downward to be stored in the oxygen storage unit 240.

At this time, the path in which the oxygen moves to reduce the volume of the oxygen generating device according to the present invention is limited to the outer surface portion of the oxygen generating unit 220. That is, the front surface and the rear surface of the oxygen generating unit 220 and the oxygen moving unit 230 is in close contact.

The oxygen storage unit 240 that stores the moved oxygen serves to store the generated oxygen and lower the temperature slightly.

The material of the oxygen storage unit 240 may be a vinyl, it can be folded and stored in storage to further reduce the volume.

Oxygen stored in the oxygen storage unit 240 is introduced into the filter unit 250 by the inhalation of the user, flows into the breathing unit 100 through the oxygen supply pipe 120 to evacuate the evacuation and emergency evacuation It becomes possible.

The filter unit 250 includes a carbon dioxide adsorption unit 251 for removing carbon dioxide remaining in oxygen introduced from the oxygen storage unit 240, and a moisture removing unit for removing moisture from oxygen from which carbon dioxide is removed ( 252).

The carbon dioxide adsorption unit 251 and the moisture removing unit 252 are separated by a diaphragm 253 capable of flowing air, respectively, and the soda lime is filled in the adsorption unit 251.

The soda lime is a mixture of sodium hydroxide, pottassium hydroxide and calcium hydroxide, and serves to absorb carbon dioxide gas.

As described above, carbon dioxide is almost removed from the air breathed by the evacuator by the action of the carbon dioxide adsorption unit 251.

In addition, the moisture removing unit 252 is filled with a silica gel (silica gel), the moisture is removed from the generated oxygen using porous particles based on the anhydrous silicate.

At this time, by removing the moisture with the removal of the water it is possible to lower the temperature of the oxygen breathed by the evacuator.

In other words, the present invention uses a simple structure to generate oxygen using carbon dioxide contained in the exhalation of the evacuator, and is easy to store and carry by lowering the temperature of the generated oxygen to allow the user to breathe.

The filter unit 250 is a semi-cylindrical structure that is bent at a predetermined angle on the outer surface of the oxygen moving unit 240, the lower part of which is part fixed to the oxygen storage unit 240.

By such a structure, the back side of the filter unit 250 and the oxygen moving unit 230 may be in close contact with the evacuator, and the front side may be evacuated without being obstructed by an obstacle when evacuating.

As described above, the emergency evacuation oxygen generating device according to the present invention uses a simple structure to generate oxygen using carbon dioxide contained in the exhaled breath, and the generated oxygen to a temperature and humidity suitable for the user to breathe. By allowing the evacuator to breathe by converting, sufficient oxygen can be supplied during the evacuation time, thereby reducing the human injury and having the effect of easy storage and portability.

Claims (7)

  1. Wearing in the face of the evacuator, the breathing unit for supplying oxygen to the evacuator by the pressure difference according to the evacuation state of the evacuator, or to discharge carbon dioxide and moisture through the carbon dioxide discharge pipe;
    A carbon dioxide supply unit connected to the carbon dioxide discharge pipe of the breathing unit and discharging carbon dioxide and moisture discharged through a carbon dioxide supply hole at a bottom thereof;
    An oxygen generating unit coupled to an outer surface of the carbon dioxide supply unit in an open state to generate oxygen by a reaction of potassium peroxide (KO 2 ) and carbon dioxide, potassium peroxide and moisture filled therein;
    An oxygen moving unit coupled to an outer side of the oxygen generating unit in an open state to provide a movement path of the generated oxygen;
    An oxygen storage unit which is fastened to the bottom surfaces of the carbon dioxide supply unit, the oxygen generating unit, and the oxygen moving unit to store oxygen moved through the oxygen moving unit;
    Emergency oxygen evacuation device comprising a filter unit attached to both sides of the oxygen moving unit to remove the carbon dioxide remaining in the oxygen stored in the oxygen storage unit, and lowers the temperature and humidity to supply to the breathing unit.
  2. The method of claim 1,
    The breathing unit,
    A carbon dioxide discharge pipe for discharging carbon dioxide contained in the exhalation to the carbon dioxide supply unit, an oxygen supply pipe for supplying oxygen filtered from the filter unit to the evacuator, and a check provided to each of the carbon dioxide discharge pipe and the oxygen supply pipe to be opened and closed by a pressure difference. Emergency evacuation oxygen generator including a valve.
  3. The method of claim 1,
    The oxygen generator and the oxygen moving unit,
    Each of the semi-cylindrical structure, the oxygen generating unit is located in the oxygen moving unit, the emergency evacuation oxygen generator, characterized in that the front and the back is in close contact with the side so as to provide a path for the oxygen to move.
  4. The method of claim 1,
    The oxygen generator,
    Emergency evacuation oxygen generator, characterized in that the potassium peroxide (KO 2 ) of 2 to 4mm particle size is filled.
  5. The method of claim 1,
    The filter unit,
    An emergency evacuation oxygen generator comprising a carbon dioxide adsorption unit for removing residual carbon dioxide from the generated oxygen, and a moisture removal unit for removing moisture from the oxygen from which the carbon dioxide is removed and lowering the temperature.
  6. The method of claim 5,
    The carbon dioxide adsorption unit,
    Emergency evacuation oxygen generator, characterized in that the soda is filled.
  7. The method of claim 5,
    The moisture removing unit,
    Emergency evacuation oxygen generator, characterized in that the silica gel is filled.
KR2020050036527U 2005-12-27 2005-12-27 Oxygen generator for emergency evacuation KR200411018Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2020050036527U KR200411018Y1 (en) 2005-12-27 2005-12-27 Oxygen generator for emergency evacuation

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR2020050036527U KR200411018Y1 (en) 2005-12-27 2005-12-27 Oxygen generator for emergency evacuation
US11/482,198 US7819117B2 (en) 2005-12-27 2006-07-07 Emergency oxygen mask
JP2006194744A JP4405483B2 (en) 2005-12-27 2006-07-14 Emergency evacuation oxygen mask
CNA2006101154892A CN1990067A (en) 2005-12-27 2006-08-10 Emergency oxygen mask

Publications (1)

Publication Number Publication Date
KR200411018Y1 true KR200411018Y1 (en) 2006-03-09

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Application Number Title Priority Date Filing Date
KR2020050036527U KR200411018Y1 (en) 2005-12-27 2005-12-27 Oxygen generator for emergency evacuation

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Country Link
KR (1) KR200411018Y1 (en)
CN (1) CN1990067A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100848619B1 (en) * 2007-01-30 2008-07-28 박세준 Underwater breathing apparatus
KR101042603B1 (en) 2009-07-02 2011-06-20 고등기술연구원연구조합 Gasification system
KR101138310B1 (en) 2011-12-30 2012-04-25 주식회사 산청 Self-contained oxygenator
KR101152675B1 (en) * 2010-04-13 2012-10-16 오석원 Self-circulation jacket type oxygen mask apparatus
KR101248117B1 (en) 2010-09-17 2013-03-27 김한승 Respiratory apparatus and method for operating the same
KR102091547B1 (en) * 2019-03-18 2020-03-20 상원산업 주식회사 Portable Oxygen Concentrator by Respiratory

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102240425A (en) * 2010-11-19 2011-11-16 上海市民办尚德实验学校 Gas mask
CN102671318B (en) * 2012-05-14 2014-07-23 北京安氧特科技有限公司 Chemical oxygen-making respirator for normal temperature phase change material refrigeration
EP2679279B1 (en) 2012-06-28 2018-07-25 Zodiac Aerotechnics Oxygen breathing device and method for maintaining an emergency oxygen system
KR20140132617A (en) * 2013-05-08 2014-11-18 주식회사 디에스과학 Portable apparatus for removing of radioactive noble gas
CN104056375B (en) * 2014-06-04 2016-10-05 成都理工大学 A kind of miniature breathing mask being applied to fire emergent escaping
CN108096727B (en) * 2018-01-17 2019-03-12 刘俊文 A kind of Portable potential balance carbon oxygen crossover autonomous respiration device
CN109731242A (en) * 2019-01-10 2019-05-10 郑璇 A kind of breathing apparatus of overboard fast oxygen gas supply
CN111494818A (en) * 2020-04-27 2020-08-07 成都大学 Produce oxygen and prevent haze gauze mask

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100848619B1 (en) * 2007-01-30 2008-07-28 박세준 Underwater breathing apparatus
KR101042603B1 (en) 2009-07-02 2011-06-20 고등기술연구원연구조합 Gasification system
KR101152675B1 (en) * 2010-04-13 2012-10-16 오석원 Self-circulation jacket type oxygen mask apparatus
KR101248117B1 (en) 2010-09-17 2013-03-27 김한승 Respiratory apparatus and method for operating the same
KR101138310B1 (en) 2011-12-30 2012-04-25 주식회사 산청 Self-contained oxygenator
KR102091547B1 (en) * 2019-03-18 2020-03-20 상원산업 주식회사 Portable Oxygen Concentrator by Respiratory

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