CN111084941A - Air supply type micro-positive pressure protective mask - Google Patents
Air supply type micro-positive pressure protective mask Download PDFInfo
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- CN111084941A CN111084941A CN202010091493.XA CN202010091493A CN111084941A CN 111084941 A CN111084941 A CN 111084941A CN 202010091493 A CN202010091493 A CN 202010091493A CN 111084941 A CN111084941 A CN 111084941A
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- 230000001681 protective effect Effects 0.000 title claims abstract description 21
- 238000001914 filtration Methods 0.000 claims abstract description 83
- 238000007789 sealing Methods 0.000 claims abstract description 30
- 239000012528 membrane Substances 0.000 claims abstract description 24
- 239000004745 nonwoven fabric Substances 0.000 claims description 9
- 229920000742 Cotton Polymers 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 239000004744 fabric Substances 0.000 claims description 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052744 lithium Inorganic materials 0.000 claims description 4
- 238000001746 injection moulding Methods 0.000 claims description 2
- 238000007664 blowing Methods 0.000 claims 3
- 230000001815 facial effect Effects 0.000 claims 1
- 230000029058 respiratory gaseous exchange Effects 0.000 abstract description 7
- 244000052616 bacterial pathogen Species 0.000 abstract description 2
- 238000001125 extrusion Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 241000700605 Viruses Species 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 206010035664 Pneumonia Diseases 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 239000000443 aerosol Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000241 respiratory effect Effects 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241000711573 Coronaviridae Species 0.000 description 1
- 208000001528 Coronaviridae Infections Diseases 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000009351 contact transmission Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000009365 direct transmission Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 210000001202 rhombencephalon Anatomy 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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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
-
- 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
- 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
- A62B18/084—Means for fastening gas-masks to heads or helmets
-
- 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
- A62B23/025—Filters for breathing-protection purposes for respirators the filter having substantially the shape of a mask
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Pulmonology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Zoology (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
The invention discloses an air supply type micro-positive pressure protective mask which comprises a mask shell and an air inlet device, wherein the overall outline of the mask shell is consistent with the face of a person, a sealing air bag used for sealing the mask shell to the face of the user is arranged on the periphery of the bottom of the mask shell, an air space is formed between the mask shell and the face of the user, first fixing belts are arranged on two sides of the mask shell, the middle position of the upper part of the mask shell is connected with the air inlet device through an air inlet pipe, a second fixing belt is arranged on the air inlet device, the air inlet device is fixed to the waist or the arm of the user through the second fixing belt, an air outlet is arranged in the middle of the mask shell, an air outlet filtering component is arranged at the air outlet, the air outlet filtering component comprises a filtering membrane and a filtering cover, a plurality of air. The invention can solve the problems that a front-line staff in a hospital isolates germs, is complex to wear, is unstable in sealing, can be crushed after being worn for a long time, and is unsmooth in breathing.
Description
Technical Field
The invention relates to the field of protective articles, in particular to an air supply type micro-positive pressure protective mask.
Background
According to the statistical analysis of the pneumonia of the novel coronavirus which is already developed in China at present, the pneumonia transmission ways of the novel coronavirus infection which can be determined at present mainly comprise direct transmission, aerosol transmission and contact transmission. The risk of infection is great when the doctor examines for the patient, sees a doctor, in order to protect the healthy of the medical personnel of first line, need to wear protective device. At present, clinical medical personnel head protection mainly is through gauze mask, goggles, face guard mode, and gauze mask and goggles only can protect single position, and wear the process loaded down with trivial details, and sealed unstable can appear seriously crushing wound to wear for a long time, and the face guard is half open architecture, only can block the place ahead droplet splash, can not provide inclosed safe space for the user.
Disclosure of Invention
The invention provides an air supply type micro-positive pressure protective mask, which aims to solve the problems that a front-line worker in a hospital isolates germs, is complex to wear, is unstable in sealing, can be crushed after being worn for a long time, and is unsmooth in breathing.
The invention adopts the technical scheme that an air supply type micro-positive pressure protective mask is provided, which comprises a mask shell and an air inlet device, the whole outline of the mask shell is consistent with the face of a person, a sealing air bag for sealing the mask shell to the face of the user is arranged on the periphery of the bottom of the mask shell, an air space is formed between the mask shell and the face of the user, first fixing belts are arranged on two sides of the mask shell, the upper portion intermediate position of face mask shell is connected with air inlet unit through the intake pipe, installs the second fixed band on the air inlet unit, and air inlet unit is fixed in user's waist or arm through the second fixed band, and the middle part of face mask shell is provided with the gas outlet, and gas outlet department installs the filtering component of giving vent to anger, and the filtering component of giving vent to anger includes filtration membrane and filter lid, has seted up a plurality of bleeder vents on the filter lid, and filtration membrane is pressed fitting between gas outlet and filter lid.
Optionally, the filtering membrane comprises a first filtering layer, a second filtering layer, a third filtering layer, a fourth filtering layer and a fifth filtering layer which are sequentially attached from outside to inside, the first filtering layer and the fifth filtering layer are respectively composed of non-woven fabrics, the second filtering layer and the third filtering layer are composed of melt-blown fabrics, and the fourth filtering layer is composed of electrostatic cotton.
Optionally, the filtering membrane comprises a first filtering layer, a second filtering layer, a third filtering layer, a fourth filtering layer and a fifth filtering layer which are sequentially attached from outside to inside, the first filtering layer and the fifth filtering layer are respectively composed of non-woven fabrics, the second filtering layer and the fourth filtering layer are composed of electrostatic cotton, and the third filtering layer is composed of melt-blown fabrics.
Optionally, air inlet unit includes power component and filtration piece, and power component includes motor, fan, lithium cell and circuit board, the material of filtering the piece is the same with the filtration membrane material among the filter component of giving vent to anger.
Optionally, the sealing airbag is an inflatable airbag, and the sealing airbag is bonded to the bottom periphery of the mask shell.
Optionally, the periphery of the sealing air bag faces towards one side of the face mask shell and is fixedly connected with an arc-shaped clamping groove, a bonding surface is arranged in the arc-shaped clamping groove, and the arc-shaped clamping groove is matched and bonded with the edge of the face mask shell into a whole.
Optionally, the sealing airbag and the face mask shell are integrally formed through a double-shot molding process or are integrally clamped through a buckle.
Optionally, the first fixing bands arranged on the two sides of the mask shell are elastic bands, the elastic bands are arranged up and down, and two ends of each elastic band are respectively sewn or connected to the two sides of the mask shell through buckles.
Optionally, the mask comprises a hood capable of surrounding the head of the user, the hood is fixed on the periphery of the bottom of the mask shell, and the sealing air bag is wrapped in the hood.
Optionally, the mask shell further comprises a fixing net bag matched with the back radian of a user, the first fixing bands arranged on two sides of the mask shell are elastic bands, the number of the elastic bands is at least four, one end of each elastic band is sewn or connected to the mask shell through a buckle, and the other end of each elastic band is sewn or connected to the fixing net bag through a buckle.
By adopting the technical scheme, the invention has the following advantages:
1. the mask can replace a mask, goggles and a face guard, the sealing air bag can increase the contact area of the mask and the face of a person, the problem of the current face pressure injury can be well solved, and meanwhile, the wearing workload of medical care personnel is reduced, and meanwhile, related medical consumables are saved;
2. the air inlet device can be fixed on the waist or the arm of a user, and the moving range of the user is not limited;
3. when the mask shell is worn on the face of a user, the sealing air bag can be tightly attached to the face of the user under the extrusion action, so that the tightness between the mask shell and the face of the user is ensured;
4. the adopted filtering membrane has a multilayer structure, so that the filtering efficiency and the airflow resistance can meet the medical protection requirement, the filtering is effectively realized, and the user is prevented from calling in particles with viruses;
5. the air inlet device can actively feed proper fresh air to a user, the air inlet pipe is arranged in the middle of the upper part of the mask shell and can form an air curtain on the face to avoid the occurrence of an atomization phenomenon, a micro-positive pressure state can be kept in an air space between the mask shell and the face of the user through the air inlet device, and the breathing position of the user is completely isolated from an external operation space, so that the personal safety of the user is effectively protected, and the breathing comfort level is improved;
6. the face mask shell and the filter cover are in interference extrusion fit, and the sealing performance and firmness of the joint are guaranteed.
Drawings
FIG. 1 is one of the schematic structural diagrams of the present invention;
FIG. 2 is a schematic cross-sectional view of a mask shell according to the present invention;
FIG. 3 is a second schematic structural diagram of the present invention;
FIG. 4 is a schematic view of the structure of one of the filtration membranes of the present invention;
FIG. 5 is a schematic view of another filtration membrane of the present invention.
Detailed Description
As shown in fig. 1 to 5, the air supply type micro-positive pressure protective mask of the present invention includes a mask shell 2 and an air inlet device 6, the whole contour of the mask shell 2 is consistent with the face of a person, a sealing air bag 4 for sealing the mask shell 2 to the face of a user is arranged on the periphery of the bottom of the mask shell 2, the sealing air bag 4 is used for sealing and attaching the mask shell 2 to the face to prevent air leakage, an air space is formed between the mask shell 2 and the face of the user, first fixing bands 5 are arranged on two sides of the mask shell 2, the first fixing bands 5 arranged on two sides of the mask shell 2 are elastic bands, the two ends of each elastic band are respectively sewn or connected to two sides of the mask shell 2 through a buckle.
The upper middle position of the mask shell 2 is connected with the air inlet device 6 through the air inlet pipe 1, the second fixing band 7 is installed on the air inlet device 6, the air inlet device 6 is fixed on the waist or the arm of a user through the second fixing band 7, the second fixing band 7 can be wide elastic bands in the prior art, the elastic bands are beneficial to being suitable for users with different body types, and the wide elastic bands can properly relieve the pressure of the user.
The middle part of the face mask shell 2 is provided with an air outlet, the air outlet is provided with an air outlet filtering component 3, the air outlet filtering component 3 comprises a filtering membrane 32 and a filtering cover 31, the filtering cover 31 is provided with a plurality of air holes, and the filtering membrane 32 is pressed between the air outlet and the filtering cover 31. The face mask shell 2 and the filter cover 31 are in interference extrusion fit, and the sealing performance and firmness of the joint are guaranteed. The periphery of gas outlet is the draw-in groove type, and filtration membrane 32 places in the draw-in groove of 2 gas outlets on face guard shell, through crossing filter cover 31 extrusion fit, guarantees three's leakproofness and firmness.
The filter membrane 32 can be used in two different embodiments.
As shown in fig. 4, scheme one: the filter membrane 32 comprises a first filter layer 321, a second filter layer 322, a third filter layer 323, a fourth filter layer 324 and a fifth filter layer 325 which are sequentially attached from outside to inside, the first filter layer 321 and the fifth filter layer 325 are respectively composed of non-woven fabrics, the second filter layer 322 and the third filter layer 323 are both composed of melt-blown fabrics, and the fourth filter layer 324 is composed of electrostatic cotton.
In the technical scheme, the first filter layer 321 of the filter membrane 32 is 45g/m2The fifth filter layer 325 is 20g/m2The non-woven fabric with the specification, the second filter layer 322 and the third filter layer 323 adopt 25g/m2The fourth filter layer 324 is 95g/m2Static cotton of the specification. In the medical environment, particles with virus usually float in the air, but the particles can not exist independently, and the particles are usually attached to dust in the air to form aerosol, the filtering membrane 32 in the technical scheme blocks pollutants through multilayer interception and electrostatic effect, and meanwhile, the number and the thickness of the filtering layers are proper, so that the respiratory airflow resistance of a user can not be excessively increased, the human health is facilitated, through testing, by adopting the combination, the NaCl filtering efficiency is 98.8%, the airflow resistance is 11.50mmH2O, and both the filtering efficiency and the airflow resistance can meet the medical protection requirements.
As shown in fig. 5, scheme two: the filter membrane 32 comprises a first filter layer 321, a second filter layer 322, a third filter layer 323, a fourth filter layer 324 and a fifth filter layer 325 which are sequentially attached from outside to inside, the first filter layer 321 and the fifth filter layer 325 are respectively composed of non-woven fabrics, the second filter layer 322 and the fourth filter layer 324 are both composed of electrostatic cotton, and the third filter layer 323 is composed of melt-blown fabrics.
In the present technical solution, the first filter layer 321 is 45g/m2The fifth filter layer 325 is 20g/m2The nonwoven fabric, the second filter layer 322 and the fourth filter layer 324 are 95g/m2The third filter layer 323 is 25g/m of static cotton2Melt-blown cloth of the specification. Tests prove that the filtering membrane 32 in the technical scheme adopts the combination, the NaCl filtering efficiency is 96.55 percent, the airflow resistance is 6.23mmH2O, and both the filtering efficiency and the airflow resistance can meet the medical protection requirements.
The upper middle position of the face mask shell 2 is provided with an air inlet, a connecting sleeve is fixed at the air inlet, one end of the air inlet pipe 1 is bonded on the connecting sleeve, the sealing performance and firmness of a joint are guaranteed, and the other end of the air inlet pipe 1 is connected with the air inlet device 6.
There are at least three kinds of connected modes between sealed gasbag 4 and face guard shell 2, sealed gasbag 4 can adopt forms such as inflatable, double-colored shaping or silica gel fastener, one of them: the sealing air bag 4 is an inflatable air bag, and the sealing air bag 4 is adhered to the bottom periphery of the mask shell 2; the second step is as follows: one side of the periphery of the sealed air bag 4 facing the mask shell 2 is fixedly connected with an arc-shaped clamping groove, a bonding surface is arranged in the arc-shaped clamping groove, and the arc-shaped clamping groove and the edge of the mask shell 2 are matched and bonded into a whole; and thirdly: sealed gasbag 4 and face mask shell 2 are as an organic whole through double-colored injection molding technology integrated into one piece or through the buckle joint, avoid bonding the quality problem that insecure arouses between sealed gasbag 4 and the face mask shell 2.
As an alternative embodiment, as shown in FIG. 3, the present invention further comprises a hood 8 capable of enclosing the head of the user, the hood 8 being fixed to the bottom periphery of the mask shell 2, and the air-tight bag 4 being enclosed in the hood 8. The hood 8 of the present invention is used in conjunction with existing protective apparel, and the bottom of the hood 8 can be inserted into the protective apparel.
As an optional embodiment, the invention further comprises a fixing net bag matched with the back radian of the user, the first fixing belts 5 arranged at two sides of the mask shell 2 are elastic belts, at least four elastic belts are arranged, one end of each elastic belt is sewn or connected to the mask shell 2 through a buckle, and the other end of each elastic belt is sewn or connected to the fixing net bag through a buckle. When the mask is used, the fixed net bag is firstly covered on the hindbrain, the mask shell 2 is covered on the face, the elastic band can tightly fix the mask shell 2, the sealing air bag 4 can ensure that the mask shell 2 is attached to the face of a user, and the sealing performance of the attachment part is ensured. By adopting the design of the rear fixing net bag, the untight sealing caused by the displacement of the elastic band can be avoided, and the discomfort caused by the long-term fixing through the elastic band can be relieved.
The mask shell 2 of the invention can be made of transparent polycarbonate material, and the hood 8 can be made of non-woven fabric and plastic film by welding.
When the mask shell is used for protection, the air inlet device 6 is fixed on the waist or the arm of a user through the second fixing belt 7, the mask shell 2 is worn on the face of the user through the first fixing belts 5 on the two sides of the mask shell 2, the sealing air bag 4 can be tightly attached to the face of the user under the extrusion action, the tightness between the mask shell 2 and the face of the user is ensured, the filtering membrane 32 at the air outlet of the mask shell 2 can realize the filtering action, and the user is prevented from breathing in particles with viruses.
Because the air inlet device 6 can actively feed proper fresh air into the user, and the air inlet device 6 can be fixed on the waist or the arm of the user, the moving range of the user can not be limited, the micro-positive pressure state can be kept in the gas space between the mask shell 2 and the face of the user through the air inlet device 6, the breathing part of the user is completely isolated from the external operation space, and the personal safety of the user is effectively protected. Meanwhile, positive pressure of the air space between the mask shell 2 and the face of the user is achieved by the air inlet device 6, filtering resistance can be transferred, resistance of air in the filtering process is borne by the external air inlet device 6, and accordingly sufficient and appropriate fresh air can be directly delivered to respiratory organs of the human body, and the breathing comfort level is improved.
The above embodiments are not intended to limit the shape, material, structure, etc. of the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides an air supply type pressure-fired protective face mask, includes face guard shell and air inlet unit, and the whole profile of face guard shell is unanimous with people's face, its characterized in that: the bottom border of face mask shell is provided with and is used for sealing up the facial sealed gasbag of user with the face mask shell, forms gas space between face mask shell and the user face, and face mask shell both sides are provided with first fixed band, the upper portion intermediate position of face mask shell is passed through the intake pipe and is connected with air inlet unit, installs the second fixed band on the air inlet unit, and air inlet unit is fixed in user's waist or arm through the second fixed band, and the middle part of face mask shell is provided with the gas outlet, and gas outlet department installs the filtering component that gives vent to anger, and the filtering component that gives vent to anger includes filtration membrane and crosses the filter cap, and a plurality of bleeder vents have been seted up on the filter.
2. The supplied air type micro-positive pressure protective mask of claim 1, wherein: the filtering membrane comprises a first filtering layer, a second filtering layer, a third filtering layer, a fourth filtering layer and a fifth filtering layer which are sequentially attached from outside to inside, the first filtering layer and the fifth filtering layer are respectively composed of non-woven fabrics, the second filtering layer and the third filtering layer are composed of melt-blown fabrics, and the fourth filtering layer is composed of electrostatic cotton.
3. The supplied air type micro-positive pressure protective mask of claim 1, wherein: the filtering membrane comprises a first filtering layer, a second filtering layer, a third filtering layer, a fourth filtering layer and a fifth filtering layer which are sequentially attached from outside to inside, the first filtering layer and the fifth filtering layer are respectively composed of non-woven fabrics, the second filtering layer and the fourth filtering layer are composed of electrostatic cotton, and the third filtering layer is composed of melt-blown fabrics.
4. The supplied air type micro-positive pressure protective mask of claim 1, wherein: the air inlet device comprises a power assembly and a filter piece, wherein the power assembly comprises a motor, a fan, a lithium battery and a circuit board, and the material of the filter piece is the same as the material of a filter membrane in the air outlet filter assembly.
5. A blowing type micro positive pressure protective mask according to claim 2 or 3, wherein: the sealing air bag is an inflatable air bag and is bonded on the periphery of the bottom of the mask shell.
6. A blowing type micro positive pressure protective mask according to claim 2 or 3, wherein: one side fixedly connected with arc draw-in groove of sealed gasbag periphery orientation face housing is equipped with the face of bonding in the arc draw-in groove, and the edge cooperation of arc draw-in groove and face housing bonds as an organic wholely.
7. A blowing type micro positive pressure protective mask according to claim 2 or 3, wherein: the sealing air bag and the face mask shell are integrally formed through a double-color injection molding process or are integrally clamped through a buckle.
8. The supplied air type micro-positive pressure protective mask of claim 1, wherein: the first fixing bands arranged on the two sides of the mask shell are elastic bands, the number of the elastic bands is two, and the two ends of each elastic band are respectively sewn or connected to the two sides of the mask shell through buckles.
9. The supplied air type micro-positive pressure protective mask of claim 7, wherein: the mask also comprises a hood which can surround the head of a user, the hood is fixed on the periphery of the bottom of the mask shell, and the sealing air bag is wrapped in the hood.
10. The supplied air type micro-positive pressure protective mask of claim 7, wherein: the mask shell is characterized by further comprising a fixing net bag matched with the back radian of a user, the first fixing bands arranged on two sides of the mask shell are elastic bands, the number of the elastic bands is at least four, one end of each elastic band is sewn or connected to the mask shell through a buckle, and the other end of each elastic band is sewn or connected to the fixing net bag through a buckle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010091493.XA CN111084941A (en) | 2020-02-13 | 2020-02-13 | Air supply type micro-positive pressure protective mask |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010091493.XA CN111084941A (en) | 2020-02-13 | 2020-02-13 | Air supply type micro-positive pressure protective mask |
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| CN111084941A true CN111084941A (en) | 2020-05-01 |
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| CN202010091493.XA Pending CN111084941A (en) | 2020-02-13 | 2020-02-13 | Air supply type micro-positive pressure protective mask |
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| CN111420317B (en) * | 2020-05-10 | 2023-06-27 | 华中科技大学同济医学院附属协和医院 | Protective hood and use method thereof |
| CN113465086A (en) * | 2021-08-05 | 2021-10-01 | 柳州工学院 | Indoor air purification device |
| CN114515398A (en) * | 2021-12-30 | 2022-05-20 | 中国人民解放军火箭军特色医学中心 | Protective mask communication device |
| CN114515398B (en) * | 2021-12-30 | 2022-10-18 | 中国人民解放军火箭军特色医学中心 | Protective mask communication device |
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