KR102358720B1 - Full face respiratory protection device - Google Patents

Abstract

The present invention relates to a full-face respirator. The full-type respiratory protector covers the entire face of the wearer to protect the wearer from airborne fine dust and airborne bacteria and viruses contained in droplets or aerosol moisture particles, and is made of a transparent material so that the wearer can see the outside. The face part, the protective gear frame covering the entire outer surface of the face part, and a silicone face adhesive part for maintaining watertightness and airtightness when the wearer wears the face part, flows into the inside of the face part from the outside, or the gas inside the face part is discharged to the outside It may include a first outdoor air connection portion having an intake passage and an exhaust passage in the center as much as possible, a filter cartridge and an air filtration filter mounted on the first outdoor air connection portion.
The air filtration filter provides the wearer with air that has been filtered from the first outdoor air connection part of the front-type respiratory protector from air that has been filtered out of fine dust and airborne bacteria and droplets or aerosol moisture particles in the outside air to protect the wearer from respiratory viral infections. can
In addition, the present invention provides oxygen through positive pressure during inhalation during self-breathing of the wearer by installing an intake valve in the ventilation hole on the lower side of the body connected to the air vent inside the front-type respirator and connecting it with a positive pressure generating respirator outside the protective device through a tube. It can assist the elderly and patients with weakened cardiorespiratory function to self-respiration in a situation in which fine dust suspended in the air is getting worse. An exhaust valve is installed in the ventilation hole, It is connected with a tube to discharge exhaust gas (carbon dioxide and water vapor) through negative pressure when exhaling during self-respiration of the wearer, and prevents the virus attached to droplets and aerosols of viral respiratory patients from leaking to the outside without a separate negative pressure system. Treatment of respiratory patients may be possible.
In addition, the present invention can be used as a bulletproof protective gear by fixing the face cover having a bulletproof function to the outer surface of the face part.
In addition, the present invention can monitor the state of the wearer capable of self-respiration by transmitting the air pressure, temperature and humidity data inside the front-type respiratory protector to the outside as sensing data.

Description

FULL FACE RESPIRATORY PROTECTION DEVICE

The present invention relates to a full-face respirator, and in particular, by filtering droplets or aerosol moisture particles including airborne fine dust, airborne bacteria and viruses in the air outside the protective equipment, pollutants (or infection sources) in the air The respiratory protection function to protect the wearer's respiratory system from It relates to a full-face respirator that supports the function of discharging exhaled gases (carbon dioxide and water vapor) through negative pressure when exhaling during self-respiration of the wearer.

Unlike airborne fine dust and airborne bacteria, which generally deteriorate human respiratory health, viruses are transmitted together with droplets or aerosol moisture particles, and there are three methods of propagation: direct transmission, contact transmission, and air transmission. is divided into Direct propagation is also called droplet propagation, and it transmits to others through droplets, that is, droplets discharged from a patient's conversation or cough. The virus spreads by splashing directly into another person's eyes or nose. And contact transmission is transmitted through physical contact with an intermediate object/person contaminated with the virus contained in the patient's runny nose and droplet water particles. On the other hand, in air propagation, aerosol water particles of 1 μm or less, which are smaller and lighter than droplet water particles, float in the air for a long time without parabolic fall due to gravity in an enclosed space and spread the virus to others.

Therefore, the air filtration filter of the full-type respiratory protection equipment used in medical, health, and quarantine sites for human respiratory viruses is a virus caused by aerosol water particles floating in the air for a long time rather than a parabolic falling droplet water particle. High performance is required to protect the wearer from air waves.

In addition, in a situation in which fine dust suspended in the air is getting worse, there are hardly any suitable oxygen supply means to support self-respiration of the elderly and patients with weakened cardiorespiratory function except in hospitals and hospitals. In order to block the spread of viruses contained in droplets or aerosols, an expensive negative pressure system requires an ambulance or an inpatient room, but it is often difficult to apply it to the field.

Diving mask with integrated snorkel, DE DE202014011184U1 (filed on 2014-05-05) Full face snorkeling mask having integral structure, PCT/CN2016/094880 (filed on Aug. 12, 2016)

The present invention is to solve the above problems by filtering droplets or aerosol moisture particles containing airborne fine dust, airborne bacteria and viruses in the air to protect the wearer's respiratory tract from airborne contaminants (or infectious agents). The purpose is to provide protective equipment for protection.

In addition, an object of the present invention is to provide a protective device that is connected to an external positive pressure generating artificial respirator and a tube as an oxygen supply means for assisting self-respiration of the wearer, such as the elderly and patients with weakened cardiorespiratory function.

In addition, an object of the present invention is to provide a protective device connected to an external negative pressure generating artificial respirator and a tube to block the surrounding propagation of the virus contained in the exhaled breath of a respiratory virus patient.

In addition, an object of the present invention is to provide a protective device that can transmit air pressure information and temperature and humidity information inside the front-type respiratory protector according to the wearer's respiration volume and the degree of adhesion of the face-contact unit to the outside as sensing data.

The full-face respirator according to an embodiment of the present invention covers the entire face to protect the wearer from airborne fine dust and airborne bacteria, and external droplets or aerosol moisture particles, and is transparent so that the wearer can see the outside. When the wearer wears a face part made of a material, the face part is mounted, the face adhesive part surrounding the wearer's face, and the entire outer surface of the face part together with the face adhesive part, water tightness and airtightness are formed inside the protective gear A first filter detachably connected to the protective equipment frame, the first external air connection part having a penetration part formed in the center to introduce external air into the inside of the face part or to exhaust the wearer's exhaled gas inside the face part to the outside, and the external air connection part may include wealth.

In addition, the first filter unit may include a filter cartridge and an air filtration filter.

In addition, the first filter unit is detachable from the first outdoor air connection unit, and the air filtration filter is laminated in order of a first nonwoven fabric layer, a melt blown synthetic polymer fiber electrostatic filter layer, a second nonwoven fabric layer, and an electrospun nanofiber filtration filter layer. can be

In addition, the filter cartridge may include an air filtration filter fixing means, an air filtration filter support means, and an air filtration filter removal hole.

In addition, one surface of the air filtration filter fixing means protrudes to fix the filter cartridge to the outer or inner surface of the first outdoor air connection part, and the air filtration filter support means includes an air filtration filter frame and at least one air filtration filter support frame. may include

In addition, the air filtration filter frame has the same shape as the cross section of the air filtration filter and accommodates the air filtration filter by folding the circumferential surface of the first outdoor air connection part, and the air filtration filter support frame presses the upper surface of the air filtration filter It may be supported so that the air filter filter does not move.

In addition, the air filtration filter removal hole is an empty space between the air filtration filter frame and the air filtration filter support frame or between the air filtration filter support frame and the air filtration filter support frame. When the air filtration filter is replaced, the The air filter can be detached from the filter cartridge by inserting a finger or a predetermined tool into the detaching hole of the air filter and pushing the air filter.

In addition, at least one layer of the first nonwoven fabric layer and the electrospun nanofiber filtration filter layer is prepared as a dispersion solution in which a copper precursor and a natural polymer are mixed as a solvent, or a dispersion solution in which a copper precursor and a synthetic polymer are mixed as a solvent can be

In addition, the face adhesion part may be a conductive silicon material containing copper nanopowder.

In addition, a sensor capable of analyzing the sensing data of at least one of the air pressure information and temperature and humidity information inside the front-type respiratory protector according to the wearer's breathing volume and the degree of adhesion of the face-adhesive part is mounted inside the face part, and the sensing data to the outside can transmit

In addition, the air filtration filter may filter at least one of airborne fine dust and airborne bacteria, droplets, or viruses attached to aerosol moisture particles contained in the air sucked in from the outside when the wearer breathes in, so that it does not flow into the inside.

In addition, the outdoor air connection part has an air duct structure in which an intake passage for introducing external gas to the inside and an exhaust passage for discharging the internal gas to the outside are formed in the center, and the air filter filter is the same as the cross-section of the first outdoor air connection part It may have a structure that covers the upper surface of the first outdoor air connection part in a shape.

In addition, the air filtration filter may further include an air gap cap that is hinged to the upper portion of the filter cartridge, and covers the air filtration filter to prevent foreign matter from entering.

In addition, a second outdoor air connection part is formed in the lower portion of the full-face type respiratory protector, and the gas inside the full-type respiratory protector is discharged to the outside through the second outdoor air connection unit, or the gas outside the full-type respiratory protector is can flow inside.

In addition, the second external air connection part includes an air vent connection body, the air vent connection body has a hollow cylindrical shape, a thread is formed on the outer surface, and an exhaust valve or an intake valve is mounted therein, and the air vent has a lower portion has an open cylindrical shape, and a screw groove corresponding to the screw thread of the outer circumferential surface of the air vent connection body is formed therein, and the screw groove and the screw thread can be rotated and coupled.

In addition, a second filter unit is mounted inside the air vent, and the second filter unit is mounted inside the air vent so that gas passes but moisture does not pass through, and the second filter unit may be an e-PTFE membrane filter.

In addition, the face part through-hole is formed in the lower part of the face part, the facial part through-hole communicates with the exhaust valve or the second intake valve, and the exhaust valve is opened when the wearer exhales from the inside of the front-type respiratory protector to the wearer exhausts the exhaled gas of the wearer to the outside, and closes when the wearer breathes in, preventing the external gas from flowing into the inside of the front-type respirator,

The second intake valve may be opened upon inhalation of the wearer to introduce gas from the outside of the front-type respirator, and may be closed upon exhalation of the wearer to discharge the exhaled gas of the wearer to the first external air connection unit.

In addition, after removing the air vent, the front-type respiratory protector is connected to a positive pressure generating artificial respirator outside the protector through a tube with an intake valve mounted on the lower side of the air vent connection body to breathe in during self-respiration of the wearer Oxygen supply through positive pressure may be possible.

In addition, after removing the air vent, in a state in which the exhaust valve is mounted on the lower side of the air vent connection body, it is connected with a negative pressure generating respirator outside the protective device with a tube, so that the inside of the front-type respiratory protection device has a higher pressure than the outside By creating a low negative pressure state, the wearer's exhaled gas can be discharged through negative pressure when exhaling during self-breathing of the wearer.

In addition, after removing the air vent and with the intake valve or exhaust valve installed, the air pressure information and temperature and humidity information inside the front-type respiratory protector according to the wearer's breathing volume and the degree of close contact with the face are analyzed as sensing data. , based on the data, it is possible to control the external positive pressure or negative pressure generating artificial respiration device.

In addition, the full-type respiratory protection device further includes a face cover, wherein the face cover is made of a transparent amorphous (AMORPHOUS) synthetic polymer PET resin with a thermoplastic, or a transparent with a thermoplastic (Thermoplastic) It may be made of PC (polycarbonate) resin, which is an amorphous (AMORPHOUS) synthetic polymer, or the PC resin may be laminated on top of the PET resin.

In addition, a fixing hole may be formed in a lower portion of the face cover at a position corresponding to the second outdoor air connection part.

In addition, it may further include a face cover fixing means for fixing the face cover to the face part.

In addition, the face cover fixing means may include a lower fixing portion for fixing the lower portion of the face cover to the air vent connection body and an upper fixing portion for fixing the upper portion of the face cover to the face portion.

In addition, the lower fixing portion is formed with a through hole through which the air vent connection body of the second outdoor air connection portion can pass, and the air vent connection body is clipped to the fixing hole of the face cover and the through hole of the lower fixing portion in turn. The face part cover may be closely fixed to the face part while the air vent and the air vent connection body are helically coupled to each other through the through hole of the lower fixing part.

In addition, the upper fixing part may include a fixing pad, a holder, a mount, and a screw.

In addition, the mount may be formed on one surface of the protector frame located on the upper portion of the face cover.

In addition, the mount is located at the top of the protector frame to fix the holder, and to fix a part of the holder connected to the mount with a screw of a tripod hole of the mount, and the holder according to the rotation of the screw The lower part of the moves up and down, and the face cover can be closely fixed through the fixing pad of the holder.

In addition, the front-type respirator may further include a sterilization unit including at least one LED for irradiating UV-C wavelength light that can be sterilized by ultraviolet rays. In addition, the sterilization unit is attached to the upper end of the holder, and as the holder is moved by rotation of the mount screw, the sterilization unit is positioned above the air chamber past the upper portion of the first outdoor air connection unit, and the light irradiated from the LED is the The filter cartridge may be delivered to the air chamber inside the front-type breathing apparatus through the first external air connection part.

In addition, the front-type respiratory protection device is a full-type snorkeling mask, the air filtering filter may be mounted on the intake portion of the front-type snorkeling mask.

According to an embodiment of the present invention, droplet or aerosol moisture containing fine dust and airborne bacteria and viruses in the outdoor air through the first filter unit composed of a filter cartridge connected to the first outdoor air connection unit and an air filtration filter. There is an advantage of protecting the wearer's respiratory tract from pollutants (or infectious agents) in the air by providing air filtered with particles to the wearer.

In addition, the present invention has the advantage of assisting the wearer's self-respiration by supplying oxygen through positive pressure when the wearer inhales inside the front-type respirator connected to the external positive pressure generating device by a tube.

In addition, the present invention provides a function of discharging exhaled gas (carbon dioxide and water vapor) through negative pressure when the wearer exhales inside the front-type respiratory protection device connected by a tube to an external negative pressure generating artificial respirator. Droplets or aerosols discharged from respiratory virus patients It has the advantage of blocking the surrounding propagation of the virus contained in it.

In addition, the present invention can be used as a bulletproof protective gear by fixing the face cover made of a polymer material having a bulletproof function to the outer surface of the protective equipment.

In addition, the present invention has the advantage of being able to monitor the air pressure information and temperature and humidity information inside the front-type respirator according to the wearer's respiration volume and the degree of adhesion of the face-adhesive part to the outside as sensing data.

1 shows a side view of a full-face respirator according to an embodiment of the present invention.
Figure 2 shows the front side of the face-type respiratory protector according to an embodiment of the present invention.
Figure 3 shows the internal gas flow of the full-face respirator according to an embodiment of the present invention.
Figure 4 shows a filter cartridge equipped with an air filtration filter according to an embodiment of the present invention.
5 is a view showing a filter cartridge from which the air filtration filter is removed according to an embodiment of the present invention.
6 is a view illustrating that the first filter unit is connected to the first outdoor air connection unit according to an embodiment of the present invention.
7 is a view showing an upper cross-section of the filter cartridge according to an embodiment of the present invention.
8 shows a stacked structure of an air filtering filter according to an embodiment of the present invention.
Figure 9 shows an air gap cap covering the filter cartridge according to an embodiment of the present invention.
10 is a view showing the configuration of a second outdoor air connection unit according to an embodiment of the present invention.
11 is an air vent connection body according to an embodiment of the present invention.
12 is a view showing an air flow of an exhaust valve according to an embodiment of the present invention.
13 is an air vent equipped with a second filter unit according to an embodiment of the present invention.
14 is a second filter unit according to an embodiment of the present invention.
15 shows a face cover and an air vent according to an embodiment of the present invention.
Figure 16 shows the configuration of the upper fixing means of the face cover according to an embodiment of the present invention.
17 is a view showing an upper fixing means and a sterilizing unit of the face cover according to an embodiment of the present invention.

The face part 10, the first external air connection part 20, the second external air connection part 30, the protective gear frame 40, the face adhesion part 90 according to an embodiment of the present invention. may include Alternatively, in accordance with an embodiment of the present invention, the front-type respiratory protection device 100 may exclude the second external air connection unit 30 .

<Face (10)>

The face part 10 covers the entire face of the wearer and is made of a transparent material so that the wearer can see the outside. The face part 10 is a transparent thermoplastic and/or amorphous polymer plastic material having an area covering the entire face such as a forehead, eyes, nose, mouth, and chin.

A sensor capable of analyzing the air pressure information and temperature and humidity information inside the front-type respiratory protector according to the wearer's respiration volume and the degree of adhesion of the face contact unit 90 is installed inside the face unit 10, and the sensing data is transmitted to the outside. can transmit

<Face Adhesive (90)>

Referring to FIG. 3 , the face part 10 is mounted on the face adhesion part 90 . The face-adhesive portion 90 surrounds the wearer's face. In addition, the face adhesion part 90 is made of a conductive silicon material containing copper (Cu) nanopowder, which has the advantage of providing an antibacterial function without sticking to dust in the air.

Referring to FIG. 3 , the face adhesion part 90 may include a first air curtain film 90a , a second air curtain film 90b , and an air chamber 90c .

The first air curtain film 90a is an air curtain film surrounding the wearer's face, and may be made of a conductive silicon material containing the above-described copper (Cu) nanopowder.

Like the first air curtain film 90a, the second air curtain film 90b may be made of a conductive silicon material containing copper (Cu) nanoparticles. In addition, the second air curtain film 90b crosses the inner central portion of the face portion 10 to form an air chamber 90c covering the nasal cavity (nose) and oral cavity (mouth) of the wearer. Through this, the watertightness and airtightness of the inside of the front-type respirator 100 can be maintained.

According to an embodiment of the present invention, at least one first intake valve 90d is installed on the upper surface of the second air curtain film 90b, and the first intake valve is installed on the upper surface of the second air curtain film 90b. At least one intake hole (not shown) communicating with the 90d may be installed. The first intake valve 90d may smoothly supply intake air flowing in from the first outdoor air connection part 20 to the nasal cavity (nose) and oral cavity (mouth) of the wearer in the air chamber 90c through the intake hole.

In addition, the face contact unit 90 receives the sensing data from the power supply device and the sensor for supplying power to the sensor together with the sensor mounted inside the face unit, the front-type respiratory protector 100 as an external device. It may include a communication device for transmitting.

<Protection Frame (40)>

The protective gear frame 40 is formed in a structure surrounding the outer surface of the face-adhesive portion (90). In addition, as described above, the face portion 10 is mounted on the face adhesion portion 90 . When the face-adhesive part 90 is mounted on the protective gear frame 40 in a state in which the face part 10 is mounted, the inside of the front-type respiratory protector 100 is formed with a sealed structure while watertightness and airtightness can be maintained.

<The first outdoor air connection unit 20>

The first outdoor air connection part 20 according to an embodiment of the present invention is an air duct including an intake passage and an exhaust passage, which are passages of the gas outside and the gas inside the front-type respiratory protector 100 . When the wearer breathes in, external air flows into the front-type respiratory protector 100 through the intake passage, and when the wearer exhales, the gas inside the front-type respiratory protector 100 through the exhaust passage is exhausted to the outside air.

When the wearer is inhaling, external air flows into the front-type respiratory protector 100 through the first outdoor air connection unit 20, and when the wearer is exhaling, the exhalation inside the front-type respiratory protector 100 Carbon dioxide and water vapor contained in may be discharged to the outside of the front-type respiratory protection device 100 through the first outdoor air connection (20).

1 to 2 , the first external air connection part 20 may be disposed on the upper portion of the front-type respiratory protection device 100 . In addition, the first outdoor air connection part 20 may be integrally formed with the protector frame 40 , and may be formed to protrude upward from the upper end of the protector frame 40 .

In addition, the cross-section of the first outdoor air connection part 20 may have an arbitrary geometric shape.

<First filter unit 50>

In the process in which external air is supplied to the wearer of the front-type respiratory protection device 100 through the first outdoor air connection part 20, fine dust and airborne bacteria and viruses attached to droplets or aerosol moisture particles are also included in the outside air. It may be introduced into the front-type respiratory protection device 100 .

In addition, when the wearer exhales in the process of exhaling exhaled gas (carbon dioxide, water vapor) according to the exhalation of the wearer of the front-type respiratory protection device 100 through the first external air connection part 20, the wearer's droplet moisture particles Even if not, the aerosol moisture particles may be discharged to the outside of the full-face respirator 100 .

The present invention provides a filter cartridge 51 detachable to the first outdoor air connection unit 20 and air to prevent the inflow and outflow of fine dust, airborne bacteria, and viruses contained in droplets or aerosol moisture particles in the air flow. It includes a first filter unit 50 including a filtration filter (52).

The first filter unit 50 according to an embodiment of the present invention is mounted to cover the upper surface of the first outdoor air connection unit 20 with a filter cartridge 51 and an air filtration filter 52 to cover the upper surface of the first outdoor air connection unit 20 when the wearer breathes. It is possible to filter airborne fine dust, airborne bacteria, and viruses attached to droplets or aerosol moisture particles contained in the air inhaled from the ventilator so as not to flow into the front-type respiratory protection device 100 . In addition, when the wearer exhales, the aerosol moisture particles that may contain viruses are filtered from the wearer's exhalation, and only the purified gas (eg, carbon dioxide and water vapor) is vented and discharged through the first external air connection part 20. Hood (hood) ) function.

<Filter cartridge (51)>

4 is a filter cartridge 51 to which the air filtration filter 52 is mounted, FIG. 5 is a filter cartridge 51 not to which the air filtration filter 52 is mounted, and FIG. 6 is a first outdoor air connection unit 20 mounted on is a filter cartridge (51).

The filter cartridge 51 is mounted on the first outdoor air connection part 20 . The filter cartridge 51 has the same geometric shape as the shape of the upper cross-section of the filter cartridge 51 so that the filter cartridge 51 can cover the first outdoor air connection part 20. .

In addition, the cross-sectional width of the filter cartridge 51 is further spaced apart by the thickness (t) of the air filtering filter 52 shown in FIG.

The filter cartridge 51 may include an air filtration filter fixing means 51a, an air filtration filter support means 51b, and an air filtration filter removal hole 51c.

Referring to FIG. 5 , one surface of the air filtration filter fixing means 51a protrudes so as to fix the filter cartridge 51 to the outer surface of the first outdoor air connection part 20 .

5 and 7, the air filtration filter support means (51b) may include an air filtration filter frame (51b1) and at least one air filtration filter support frame (51b2).

The air filtration filter frame 51b1 may support the air filtration filter 52 covering the upper surface of the first outdoor air connection part 20 so as not to move along the side surface of the first outdoor air connection part 20 by folding it. In addition, the air filtering filter support frame (51b2) is supported so as not to move by pressing the upper surface of the air filtering filter (52).

The air filtering filter support frame (51b2) is formed to be connected to the air filtering filter frame (51b1). In the process of attaching the filter cartridge 51 to cover the upper surface of the first outdoor air connection part 20, which is an air duct, the air filtering filter 52 is externally moved to the lower part of the air filter support frame 51b2. It can be supported so that it does not move by pressing the upper surface of the That is, the circumference of the air filtration filter 52 is folded by the air filtration filter frame 51b1 and sandwiched between the side of the first outdoor air connection part that is the air duct and the inner surface of the filter cartridge 51, The upper surface is supported so as not to be moved by being pressed by the air filter support frame (51b2), and when the filter cartridge (51) is mounted on the first outdoor air connection part (20), the air filter filter (52) is prevented from being detached to the outside.

Although the air filter filter support frame 51b2 having various geometric shapes is illustrated in FIG. 7 , the present invention is not limited thereto. According to the geometric shape of the cross-section of the filter cartridge 51, one or more air filtration filter support frames 51b2 and one or more air filtration filter removal holes 51c may be formed.

The air filtration filter removal hole 51c is an empty space between the air filtration filter frame 51b1 and the air filtration filter support frame 51b2 or the air filtration filter support frame 51b2 and the air filtration filter support frame 51b2. In the case of replacing the filtration filter 52, insert a detachable means such as a finger or a predetermined tool into the air filtration filter removal hole 51c and push the upper surface of the air filtration filter 52 to filter air in the filter cartridge 51 The filter 52 may be detachable.

In the upper part of FIG. 7 , two air filtration filter support frames 51b2 and a total of three air filtration filter removal holes 51c are shown, but the present invention is not limited thereto. When one (51b2) is formed, a total of two air filtration filter detachment holes (51c) are formed, and when three air filtration filter support frames (51b2) are formed, a total of four air filtration filter detachment holes (51c) are formed. can be formed.

In particular, the filter cartridge 51 of the present invention can be mounted and applied to the intake part of a full-face snorkeling mask to be described later. have an advantage

<Air filter (52)>

8, the air filtration filter 52 has a first nonwoven fabric layer 52a as an outer skin layer, a second nonwoven fabric layer 52d as a filter layer, and a melt blown synthetic polymer fiber electrostatic filter layer 52b as a filter layer, electrospun nano It may include a fiber filtration filter layer (52c). Preferably, the air filtration filter 52 is a melt blown synthetic polymer fiber electrostatic filter layer 52b, electrospun nanofiber filtration from top to bottom in an outer skin layer composed of a first nonwoven fabric layer 52a and a second nonwoven fabric layer 52d. The filter layer 52c may be configured in a sandwich shape. Here, when the air filtration filter 52 is covered and mounted on the upper surface of the first external air force unit 20, which is the air duct through the filter cartridge 51, the first nonwoven fabric layer 52a is disposed on the upper surface, and the second nonwoven fabric The layer 52d is in contact with the lower surface. Here, the upper surface refers to the outside air side, and the lower surface refers to the first outdoor air connection part 20 side.

In addition, the air filtration filter 52 may implement double air filtration performance as a filter layer. That is, the electrostatic force of the melt blown synthetic polymer fiber electrostatic filter layer 52b and the physical force of the electrospun nanofiber filtration filter layer 52c can filter suspended fine dust excluding gas, airborne bacteria, droplets or viruses attached to water particles in aerosols. can

That is, gaseous substances such as carbon dioxide, oxygen, and water vapor pass through both the melt blown synthetic polymer fiber electrostatic filter layer 52b and the electrospun nanofiber filter layer 52c, but airborne fine dust, airborne bacteria, and droplets or aerosol moisture Since the particles have a negative charge value, they are filtered first in the melt blown synthetic polymer fiber electrostatic filter layer 52b, or if there is no negative charge value, all of the particles are filtered in the electrospun nanofiber filter layer 52c with dense pores. can

In addition, the virus contained in the aerosol moisture particles caused by the wearer's exhalation inside the respirator 100 is also filtered by the melt blown synthetic polymer fiber electrostatic filter layer 52b and the electrospun nanofiber filtration filter layer 52c. It is possible to prevent the air propagation of the virus through the outdoor air connection unit 20 .

At least one layer of the first non-woven fabric layer 52a and the electrospun nanofiber filtration filter layer 52c is prepared as a dispersion solution in which a synthetic and/or natural polymer is mixed with a copper precursor (Cu+) as a solvent, and airborne bacteria and droplets Alternatively, it may provide an antibacterial function against viruses attached to the aerosol water particles.

Preferably, the shapes of the air filtration filter 52 before being mounted on the filter cartridge 51 have the same geometric shape as the cross-section of the filter cartridge 51, and the upper surface of the first outdoor air connection part 20 can be covered

The width of the air filtration filter 52 may be 1 to 1+4h when the cross-sectional width of the filter cartridge 51 is set to 1. Here, h is the height of the air filter frame (51b1).

<Air gap cap of filter cartridge (53)>

Referring to FIG. 9 , the filter cartridge 51 may further include an air gap cap 53 . The air gap cap 53 is hinged to the upper portion of the filter cartridge 51 and covers the air filtering filter 52 so that external foreign substances such as worms and sand do not enter the front-type respiratory protection device 100 inside and External gas can be communicated.

<Second outdoor air connection unit 30>

1 to 2 , the second external air connection part 30 may be disposed under the front-type respiratory protection device 100 .

The second outdoor air connection part 30 may discharge the wearer's exhaled gas (carbon dioxide and water vapor) from the inside of the front-type respiratory protector 100 at the lower end of the face part 10 to the outside through the exhaust valve 33a.

According to an embodiment of the present invention, a ventilation hole (not shown) of the face part may be formed in a lower portion of the face part 10 . The face part ventilation hole may allow gas inside the face part 10 to be discharged to the outside or to allow external gas to flow into the inside of the face part 10 .

According to an embodiment, the ventilation hole of the face part communicates with the exhaust valve 33a for exhausting the gas inside the front-type respiratory protection device 100 to the outside, or the front-type respiratory protection device 100 for introducing gas from the outside to the inside It may communicate with the intake valve (33b).

1 and 10 , the second outdoor air connection part 30 may include an air vent connection body 31 and an air vent 32 .

< Air vent connection body (31) >

Referring to FIG. 11 , the air vent connection body 31 of the second external air connection part 30 has a cylindrical shape, and the exhaust valve 33a or intake valve 33b is opened only according to the gas flow directed in a specific direction therein. ) can be installed in communication with the ventilation hole. In addition, the outer circumferential surface of the air vent connection body 31 is threaded so that it can be helically rotated and coupled with a helical groove corresponding to the thread.

As described above, when the exhaust valve 33a is installed, the wearer's exhaled gas (eg, carbon dioxide and water vapor) passes through the facial ventilation hole (not shown) and then passes through the exhaust valve 33a to the front-type respiratory protector. (100) is discharged to the outside.

In addition, referring to Figure 12, the exhaust valve (33a) is opened when the wearer's exhalation, the gas inside the front-type respirator 100 is discharged to the outside, when the wearer's breathing, the exhaust valve (33a) Closed, it is possible to prevent the external gas from flowing into the front-type respirator 100 inside.

On the contrary, the intake valve 33b is opened when the wearer breathes in, and external gas flows into the front-type respiratory protector 100, and when the wearer breathes out, the intake valve 33b is closed, and the gas inside It can be prevented from being discharged to the outside of the front-type respiratory protection device (100).

<Air vent (32)>

The air vent 32 has a cylindrical cap shape having an air groove 32a on its upper surface, and its lower surface is opened in a hollow cylindrical shape.

At least one air on the upper surface of the air vent 32 so as to discharge the wearer's exhaled gas from the inside of the front-type respiratory protector to the outside through the exhaust valve 33a and the membrane second filter part 32b to be described later A vent air groove 32a may be formed.

A screw groove corresponding to the screw thread may be formed on the outer peripheral surface of the cylindrical air vent 32 . The screw groove of the air vent 32 has a structure corresponding to the screw thread 31a of the main body, and may be connected to the screw thread 31a while helically rotating.

The air vent 32 may include a membrane second filter part 32b made of an e-PTFE material. The second filter part 32b is manufactured in the same shape as the cross-section of the air vent 32, and is preferably manufactured in a circular shape. The second filter part 32b is mounted on the inner upper surface of the air vent 32 to cover the second outdoor air connection part 30 .

At this time, in the second filter part 32b, which is the membrane filter, the gas contained in the wearer's exhalation discharged from the second outdoor air connection part 30 through the exhaust valve 33a passes, but droplets contained in the wearer's exhalation ( Dropet) and aerosol (Aerosol) form of moisture can be prevented from being discharged to the outside of the front-type respirator 100 .

According to the first embodiment of the present invention, the front-type respiratory protection device 100 of the present invention is a state in which the second external air connection part 30 is covered with the air vent 32, and medical staff who take care of patients infected with viruses and other bacteria , can be worn by non-patients, such as patient guardians and quarantine personnel. At this time, in the case of connecting the air vent 32 equipped with the e-PTFE membrane filter together with the exhaust valve 33a to the air vent connection body 31, moisture in the form of droplets or aerosols from the wearer's oral cavity The gas (water vapor and carbon dioxide) contained in the wearer's exhalation is discharged while the particles are not discharged to the outside of the full-face respiratory protector 100, so that the virus contained in the droplets or aerosol is outside of the full-face respiratory protector 100 discharge can be prevented.

In addition, when the non-patient is the wearer, the sound from the outside of the front-type respirator 100 passes through the ventilation hole of the face part from which the exhaust valve 33a is removed and is the membrane filter mounted inside the air vent 32. 2 After passing through the filter unit (32b) is delivered to the front-type respiratory protection device (100). Therefore, the front-type respirator 100 of the present invention can provide a function that allows the wearer of the front-type respirator 100 to communicate with the outside even after the exhaust valve 33a is removed.

According to the second embodiment of the present invention, the wearer may be a patient in the face mask 100 of the present invention, conversely. At this time, when the exhaust valve 33a is present in the air vent connection body 31 and only the air vent 32 is removed, the air vent connection body 31 generates positive pressure outside the front-type respiratory protector 100 , artificial respiration Connected to the device and tube to supply oxygen through positive pressure and generate external negative pressure when breathing in during self-respiration of the wearer Connected to a ventilator and tube to discharge exhaust gas (carbon dioxide and water vapor) through negative pressure when exhaling during self-breathing of the wearer function can be supported.

In this way, when only the air vent 32 has been removed, the air vent connection body 31 is connected to an external negative pressure generating artificial respirator such as a portable purification equipment or fixed purification equipment that forms negative pressure by electric power through a tube to provide a front-type respiratory protection device ( 100) It is possible to make the inside into a negative pressure state with a lower pressure than the outside. Preferably, when the viral respiratory patient wears the full-face respiratory protector 100 with the inside in a negative pressure state, the entire face of the patient is sealed through the full-face respiratory protector 100 to prevent infection sources from the nasal cavity and oral cavity. By preventing the virus and other substances from being discharged out of the full-face respirator 100, it is not necessary to negatively pressure the entire specific space (eg, a hospital room), thereby reducing the cost and effort required therefor.

According to the third embodiment of the present invention, the air vent 32 may be removed from the air vent connection body 31 and the second intake valve 33b may be mounted instead of the exhaust valve 33a. Similarly, the front-type respiratory protection device 100 equipped with the second intake valve 33b on the air vent connection body 31 from which only the air vent 32 has been removed is used to assist the elderly and patients with weakened cardiorespiratory function for self-respiration. It can be used as an appropriate oxygen supply means. In this way, the air vent 32 mounted on the air vent connection body 31 is removed and the second intake valve 33b is installed instead of the exhaust valve 33a, and the positive pressure generating device outside the protective equipment is connected with a tube. In this case, during self-respiration of the wearer, oxygen through positive pressure flows into the inside of the front-type respiratory protector 100 during inhalation, and during exhalation, the second inhalation valve 33b is closed and the front-type respiratory protector 100 inside of gas (carbon dioxide and water vapor) is discharged to the first outdoor air connection part 20 on the upper part of the face part.

At the same time, inside the face part 10, there is a sensor capable of analyzing the sensing data of at least one of air pressure information and temperature and humidity information inside the front-type respiratory protector according to the wearer's breathing amount and the degree of adhesion of the face contact part 90. It is possible to provide a positive pressure oxygen supply function that introduces oxygen into the second outdoor air connection unit 20 while controlling the operation of the machine to supply an appropriate amount of oxygen to the wearer while analyzing the sensor data that is mounted and transmitted to the outside.

<Face cover (60)>

According to an embodiment of the present invention, the front-type respiratory protection device 100 of the present invention may include a face cover 60 . The face cover 60 is made of PET resin, which is a transparent amorphous (AMORPHOUS) synthetic polymer with a thermoplastic (Thermoplastic), and can protect the face part of the front-type respirator 100 from contamination or impact damage and scratches. .

In addition, the face cover 60 is made of PC (polycarbonate) resin which is a transparent amorphous (AMORPHOUS) synthetic polymer with a thermoplastic (Thermoplastic) can provide a bulletproof function.

Alternatively, the face cover 60 may provide both a pollution prevention function and a bulletproof function by laminating the PC resin on the PET resin.

Referring to FIG. 15 , the face cover 60 has a shape corresponding to the face part 10 of the front-type respirator 100 . In addition, the lower portion of the face cover 60 has a fixing hole 61 at a position corresponding to the second outdoor air connection part 30 . Preferably, the air vent connection body 31 of the second outdoor air connection part 30 is inserted into the fixing hole 61 of the face cover 60 and the through hole 71a of the lower fixing part 71, and is a membrane filter. The face cover 60 is fixed by screwing the air vent 32 to which the second filter unit is mounted.

<Face cover fixing means (70)>

According to an embodiment of the present invention, according to FIG. 17 , the front-type respirator 100 may include a face cover fixing means 70 for fixing the face cover 60 to the face 10 .

The face cover fixing means 70 is a lower fixing part 71 for fixing the lower part of the face cover 60 to the facial part 10, and an upper fixing part for fixing the upper part of the face part cover 60 to the facial part 10 ( 72) may be included.

Referring to FIG. 17 , a face cover fixing hole 61 through which the air vent connection body 31 of the second outdoor air connection part passes and a through hole 71a of the lower fixing part 71 may be formed. In addition, the lower fixing part 71 can fix the lower part of the facial part by inserting the facial part cover 60 into the facial part 10 in a clip manner.

In addition, through the face cover fixing hole 61, the air vent 32 of the second outdoor air connection part is helically coupled with the air vent connection body 31 of the second connector while the face part cover 60 is more strongly the face part 10 ) can be tightly fixed.

16 and 18 , the upper fixing part 72 may include a fixing pad 72a, a holder 72b, a mount 72c, and a screw 72d. The fixing pad 72a , the holder 72b , the mount 72c , and the screw 72d are disposed on the face part 10 and the face part cover 60 .

The mount (72c) is formed on one surface of the protector frame (40) located above the face cover (60), and protrudes upward. In some cases, the mount 72c may be injection-molded integrally with the protective gear frame 40 .

The first end of the mount 72c is connected to the protective gear frame 40, and the second end has a first screw through hole (not shown) and a second screw through hole (not shown) into which a screw 72d can be inserted. ) and a third screw through hole (not shown) are formed.

The holder 72b is mounted on a mount 72c. Preferably, a part of the holder (72b) is connected to the screw (72d), and the lower part of the holder (72b) moves up and down according to the rotation of the screw (72d) to move the face part cover (60) to the face part (10) It can be fixed closely to the top.

Also, the lower end of the holder 72b may be connected to the fixing pad 72a. A lower end of the holder 72b may include a connection means for fixing the fixing pad 72a and connecting the fixing pad 72a and the holder 72b. The connection means may include a fixing frame 72b1 for fixing the fixing pad 72a, and a connection bar 72b2 for connecting the holder 72b and the fixing frame 72b1.

As the lower part of the holder 72b is moved by the rotation of the screw 72d, the fixing pad 72a is moved toward the face cover 60. The fixing pad 72a moves toward the face cover 60 and presses the upper part of the face cover 60 so that the face cover 60 is in close contact with the upper face of the face part 10 to be fixed.

In addition, the mount 72c is located at the top of the protective gear frame 40 to fix the holder 72b, and the holder connected to the mount with a screw of the Tripod Hole of the mount 72c ( 72b) can be fixed.

<Sterilization unit (80)>

The sterilization unit 80 of the present invention is an LED 81 irradiating ultraviolet rays of UV-C wavelength, and may be attached to the second end of the holder 72b. As the holder 72b moves like a seesaw by the rotation of the screw 72d, the sterilization unit 80 passes over the first outdoor air connection unit 20 that is the air duct of the front-type respiratory protection device 100, and is used for front-type breathing It can be moved upwards in the internal air chamber (90c) of the protective equipment (100).

The sterilization unit 80 may include at least one LED 80a irradiating light capable of UV sterilization. The light irradiated from the LED (80a) passes through the filter cartridge (51) and the first outdoor air connection part (20) and is transmitted to the inside of the air chamber (90c) of the front-type respiratory protection device (100) to prevent bacteria or viruses from UV rays (UV-C wavelength) can be sterilized.

The sterilization unit 80 can be charged by receiving household power from a smartphone charger to a smartphone charging terminal such as a USB terminal 80b as a charging means.

In addition, the sterilization unit 80 can be used as a handle when not worn when not irradiated with ultraviolet rays and not charged to prevent contamination of the front-type respirator 100 by the wearer's hand.

<Full-face snorkeling mask>

According to an embodiment of the present invention, the full-face respirator 100 may be a full-face snorkeling mask. The full-face snorkeling mask may cover the entire face of the wearer. In addition, the full-face snorkeling mask includes an intake unit for introducing external air into the mask.

In this way, when the full-face snorkeling mask is used as the full-type respiratory protection device 100, the first filter unit 50 is mounted on the intake part of the full-type snorkeling mask possessed by each home or institution, so that droplets or aerosol By filtering the virus attached to the mask so that it does not enter the mask, or conversely, by filtering the virus attached to the droplets or aerosol inside the mask from being discharged to the outside of the mask, infectious diseases caused by the spread of the virus can be effectively prevented.

The intake part of the full-face snorkeling mask has a configuration corresponding to the first external air connection part 20 , and since all the above-described configurations are equally applied to the full-face snorkeling mask, overlapping descriptions will be omitted.

Claims (21)

A face part made of a transparent material that covers the entire face to protect the wearer from fine dust and airborne bacteria in the air and external droplets or aerosol moisture particles and allows the wearer to see the outside;
a face-adhesive part that mounts the face part and wraps the wearer's face;
a protective gear frame that surrounds the entire outer surface of the face part together with the face adhesion part and is watertight and airtight inside the protective gear when worn by the wearer;
a first external air connection part having a penetration part formed in the center to introduce external air into the inside of the face part, or to discharge the wearer's exhaled gas inside the face part to the outside; and
Comprising a first filter part detachably connected to the outdoor air connection part,
The first filter unit includes a filter cartridge and an air filtration filter,
The first filter unit is detachable from the first outdoor air connection unit,
The air filtration filter is laminated in order of a first nonwoven fabric layer, a melt blown synthetic polymer fiber electrostatic filter layer, a second nonwoven fabric layer, and an electrospun nanofiber filtration filter layer,
A second external air connection part is formed in the lower part of the front-type respiratory protection device,
The gas inside the full-face respiratory protector is discharged to the outside through the second external air connection part, or the gas outside the full-face respiratory protector is introduced into the interior,
The second outdoor air connection unit includes an air vent connection body,
The air vent connection body has a hollow cylindrical shape, a thread is formed on the outer surface, and an exhaust valve or an intake valve is mounted inside,
The air vent has a hollow cylindrical shape with an open lower portion, and a screw groove corresponding to the screw thread of the outer circumferential surface of the air vent connection body is formed therein, and the screw groove and the screw thread are rotated and coupled;
A second filter unit is mounted inside the air vent,
The second filter unit is a membrane filter made of e-PTFE material that is installed inside the air vent to pass gas but not moisture,
A face part through hole is formed in the lower part of the face part,
The face part through-hole communicates with the exhaust valve or the second intake valve,
The exhaust valve is opened when the wearer exhales to discharge the wearer's exhaled gas from the inside of the front-type respiratory protector to the outside, and is closed when the wearer breathes in, so that the external gas does not flow into the front-type respiratory protector prevent it,
The second intake valve is opened when the wearer breathes in to introduce gas from the outside of the front-type respirator, and is closed when the wearer breathes out, characterized in that it discharges the wearer's exhaled gas to the first external air connection part Full-face respirator. According to claim 1,
The filter cartridge includes an air filtration filter fixing means, an air filtration filter support means, and an air filtration filter removal hole,
One surface of the air filtration filter fixing means protrudes so as to fix the filter cartridge to the outer or inner surface of the first outdoor air connection part,
The air filtration filter support means includes an air filtration filter frame and at least one air filtration filter support frame,
The air filtering filter frame has the same shape as the cross section of the air filtering filter and accommodates the air filtering filter by folding the circumferential surface of the first outdoor air connection part, and the air filtering filter support frame presses the upper surface of the air filtering filter to receive the air Support the filter so that it does not move,
The air filtration filter removal hole is an empty space between the air filtration filter frame and the air filtration filter support frame or between the air filtration filter support frame and the air filtration filter support frame. When the air filtration filter is exchanged, the air filtration A front-type respiratory protection device, characterized in that the air filter is detached from the filter cartridge by inserting a finger and a predetermined tool into the filter detachment hole as a detachment means to push the air filter filter. According to claim 1,
At least one layer of the first nonwoven fabric layer and the electrospun nanofiber filtration filter layer is prepared as a dispersion solution in which a copper precursor and a natural polymer are mixed as a solvent, or a dispersion solution in which a copper precursor and a synthetic polymer are mixed as a solvent. Features a full-face respirator. According to claim 1,
The face-adhesive part is a full-face respiratory protector, characterized in that it is made of a conductive silicon material containing copper nano-powder. According to claim 1, wherein the inside of the face part is equipped with a sensor capable of analyzing the sensing data of at least one of air pressure information and temperature and humidity information inside the front-type respiratory protector according to the wearer's respiration amount and the degree of adhesion of the face-adhesive part. A full-face respirator, characterized in that it transmits the sensed data. According to claim 1, wherein the air filtering filter filters at least one of airborne fine dust and airborne bacteria, droplets, or viruses attached to aerosol moisture particles contained in the air sucked in from the outside when the wearer breathes so as not to flow into the inside. A full-face respirator, characterized in that. According to claim 1,
The external air connection part is an air duct structure in which an intake passage for introducing an external gas into the inside and an exhaust passage for discharging the internal gas to the outside are formed in the center,
The air filtration filter is a front-type respiratory protector, characterized in that the structure covering the upper surface of the first outdoor air connection portion in the same shape as the cross-section of the first outdoor air connection portion. According to claim 1,
The air filtration filter is hinged to the upper portion of the filter cartridge, the front-type respiratory protection device, characterized in that it further comprises an air gap cap to cover the air filtration filter to prevent foreign substances from entering. delete delete delete delete The method according to claim 1, wherein the full-face respirator is
After removing the air vent, it is possible to supply oxygen through positive pressure during inhalation during self-breathing of the wearer by connecting it to a positive pressure generating respirator outside the protective equipment with an intake valve mounted on the lower side of the air vent connection body. ,
After removing the air vent, with the exhaust valve mounted on the lower side of the air vent connection main body, it is connected to a ventilator for generating negative pressure outside the protective device with a tube, so that the inside of the front-type respirator has a lower negative pressure than the outside A full-face respiratory protection device, characterized in that the wearer's exhaled gas is discharged through negative pressure when exhaled during self-respiration of the wearer.
14. The method of claim 13,
After removing the air vent, with the intake valve or exhaust valve installed, the air pressure information and temperature and humidity information inside the front-type respiratory protector according to the wearer's breathing volume and the degree of close contact with the face are analyzed as sensing data, and the A full-face respirator, characterized in that it controls a ventilation device that generates positive or negative pressure outside the protective device based on data. A face part made of a transparent material that covers the entire face to protect the wearer from fine dust and airborne bacteria in the air and external droplets or aerosol moisture particles and allows the wearer to see the outside;
a face-adhesive part that mounts the face part and wraps the wearer's face;
a protective gear frame that surrounds the entire outer surface of the face part together with the face adhesion part and is watertight and airtight inside the protective gear when worn by the wearer;
a first external air connection part having a penetration part formed in the center to introduce external air into the inside of the face part, or to discharge the wearer's exhaled gas inside the face part to the outside;
a first filter unit detachably connected to the outdoor air connection unit; and
Including a face cover,
The first filter unit includes a filter cartridge and an air filtration filter,
The first filter unit is detachable from the first outdoor air connection unit,
The air filtration filter is laminated in order of a first nonwoven fabric layer, a melt blown synthetic polymer fiber electrostatic filter layer, a second nonwoven fabric layer, and an electrospun nanofiber filtration filter layer,
The face cover is made of PET resin, which is a transparent amorphous (AMORPHOUS) synthetic polymer with thermoplastic, or PC (polycarbonate) resin, which is a transparent amorphous (AMORPHOUS) synthetic polymer with thermoplastic. manufactured, or by laminating the PC resin on top of the PET resin,
Front-type respiratory protection device, characterized in that it further comprises a face cover fixing means for fixing the face part cover to the face part. 16. The method of claim 15,
A second external air connection part is formed in the lower part of the front-type respiratory protection device,
The gas inside the full-face respiratory protector is discharged to the outside through the second external air connection part, or the gas outside the full-face respiratory protector is introduced into the inside,
A front-type respiratory protection device, characterized in that a fixing hole is formed at a position corresponding to the second external air connection part at a lower portion of the face cover. delete 17. The method of claim 16,
The second outdoor air connection unit includes an air vent connection body,
The air vent connection body has a hollow cylindrical shape, a thread is formed on the outer surface, and an exhaust valve or an intake valve is mounted inside,
The air vent has a hollow cylindrical shape with an open lower portion, and a screw groove corresponding to the screw thread of the outer circumferential surface of the air vent connection body is formed therein, and the screw groove and the screw thread are rotated and coupled;
The face cover fixing means includes a lower fixing part for fixing the lower part of the face cover to the air vent connection body and an upper fixing part for fixing the upper part of the face cover to the face part,
The lower fixing part has a through hole through which the air vent connection body of the second outdoor air connection part can pass, and inserts the air vent connection body in a clip manner by inserting the fixing hole of the face cover and the through hole of the lower fixing part in sequence. It is fixed, and the air vent and the air vent connection main body through the through hole of the lower fixing part is helically coupled to the face part cover is a front-type respiratory protector, characterized in that the fixed close to the face part. The method of claim 18, wherein the upper fixing part comprises a fixing pad, a holder, a mount, a screw,
The mount is formed on one surface of the protective gear frame located on the upper part of the face cover,
The mount is located on the top of the protector frame to fix the holder, and a part of the holder connected to the mount with a screw of the Tripod Hole of the mount is fixed,
The lower part of the holder moves up and down according to the rotation of the screw, and the front-type respiratory protector, characterized in that the face cover is closely fixed through the fixing pad of the holder. 20. The method of claim 19, wherein the full-face respirator is
It further includes a sterilization unit including at least one LED irradiating light of a UV-C wavelength that can be sterilized by ultraviolet rays,
The sterilization unit is attached to the upper end of the holder,
As the holder is moved by the rotation of the mount screw, the sterilization part is positioned above the air chamber past the upper part of the first outdoor air connection part,
The light irradiated from the LED passes through the filter cartridge and the first external air connection part, and is transmitted to the air chamber inside the front-type breathing apparatus. 21. The method according to any one of claims 1 to 8, 13 to 16 and 18 to 20,
The front-type respiratory protection device is a full-type snorkeling mask, and the front-type respiratory protection device, characterized in that the air filtration filter is mounted on the intake part of the front-type snorkeling mask.

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