KR102210239B1 - Anti-virus filter mask using bronze sintered filter - Google Patents

Abstract

The present invention relates to an antivirus filter mask using a sintered bronze filter to be used semi-permanently. According to the present invention, the antivirus filter mask using sintered bronze filter comprises: a mask main body including a mouth cover part provided to cover a mouth portion and a nose cover part protruding to a front side more than the mouth cover part to cover the nose portion; a sterilization filter member coupled to the lower end of the nose cover and sterilizing and purifying air sucked into the mask main body; and air discharge valves provided in the mask main body on both sides of the mouth cover part and discharging and blocking the exhaled breath inside the mask main body. The sterilization filter member is formed of a deep filtration type porous filter which is manufactured by processing bronze containing 70 to 90 wt% of copper into a powder form and sintering bronze powder at high temperature in a vacuum furnace.

Description

Anti-virus filter mask using bronze sintered filter}

The present invention relates to a virus sterilization filter mask using a bronze sintered filter, and more particularly, to a virus sterilization filter mask using a detachable bronze sintered filter.

Masks that are generally worn on the face to cover the nose and mouth are generally used to prevent contaminants from entering the wearer's respiratory system and to protect other people or items from exposure to pathogens and other contaminants released by the wearer. It is worn over a person's breathing passages for two common purposes.

In recent years, it is essential to wear a mask that can prevent diseases such as respiratory diseases caused by harmful substances as much as possible by wearing a mask on days when yellow dust in the air occurs particularly severely, and the type is a mask that can be used from disposable to multiple times. It is commercially available in various ways.

In addition, novel viruses such as coronavirus of severe acute respiratory syndrome (SARS), swine influenza (SI), and avian influenza (AI) have appeared, and masks to prevent their transmission The demand is increasing.

In particular, COVID-19, which developed in Wuhan, China in January 2020, caused a massive mask uprising in Korea, and a pan-national movement to obtain disposable masks changed our daily life patterns. The invasion of viruses such as the recent H1N1 flu, MERS, and SARS into humanity will continue to occur in the future, and it is predicted that the necessity of masks will emerge as an important item to humanity.

However, in the conventional fiber mask or nonwoven mask, the static electricity formed on the fiber surface disappears when it touches moisture, so the filter efficiency rapidly decreases after a certain period of time after wearing the mask or washing. Masks containing electrostatic filters (non-woven fabrics) are disposable products and cannot be reused, so mass production and purchase are required in the event of a long-term virus outbreak.

Accordingly, there is a high possibility of a mask upheaval as the supply of disposable masks cannot keep up with the purchase demand in the future, and secondary contamination is likely to occur as the mask contaminated with the virus is discarded unprotected by the use of disposable products. There is.

The technology behind the present application is disclosed in Korean Patent Application Publication No. 10-2018-0064337.

One technical problem to be solved in the present invention is to provide a virus sterilizing filter mask using a bronze sintered filter that can effectively prevent pathogens or viruses from penetrating into the respiratory tract as well as blocking ultrafine dust in the air. Have.

Another technical problem to be achieved by the present invention is to provide a virus sterilization filter mask using a bronze sintered filter capable of suppressing secondary contamination by reducing the amount of waste in the mask because it is easy to separate and wash and can be used semi-permanently.

The problem to be solved by the present invention is not limited to the problems mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

The virus sterilization filter mask according to embodiments of the present invention for achieving the above object is wearable on the user's face so as to cover the nose and mouth in a closed state from the outside, and is provided to cover the mouth. A mask body including a nose cover portion protruding forward from the mouth cover portion to cover the cover portion and the nose portion; A sterilization filter member coupled to a lower end of the nose cover and sterilizing and purifying the air sucked into the mask body; And exhaust valves respectively provided in the mask body on both sides of the mouth cover and exhausting and blocking exhalation from the inside of the mask body, wherein the sterilizing filter member is a filter inserted and coupled to the lower end of the nose cover. Fixed part; A filter connection part coupled to the filter fixing part and having a cylindrical opening having an open upper surface and a lower surface thereof; And a bronze sintered filter that is detachably bonded to the filter connection part, wherein the bronze sintered filter processes bronze containing 70 to 90% by weight of copper into a powder form, and then sintered in a vacuum furnace at high heat to provide a depth filtration method. It is characterized in that it is made of a porous filter.

According to an embodiment, first threads are formed on the inner circumferential surface of the filter connection part exposed to the opening, and the bronze sintered filter has a cylindrical shape with an open top surface, and the first thread is on the outer circumferential surface of the bronze sintered filter. Second threads corresponding to the are formed, and the upper portion of the bronze sintered filter is inserted into the opening in a screw-fastening manner, so that the bronze sintered filter is detachably coupled to the filter connection part.

According to an embodiment, the bronze sintered filter may be coupled to the filter connection portion so as to have a long axis in a direction perpendicular to a direction parallel to the lower end of the nose cover.

According to an embodiment, the sterilization filter member further includes a chemical filter medium filled in the bronze sintered filter and a filter cover that covers the open upper surface of the bronze sintered filter, and the chemical filter medium is contained in the inhaled air. In order to remove harmful gases and odors, regenerationable activated carbon is used, and the filter cover is for preventing the chemical filter medium from flowing out of the bronze sintered filter, and a mesh net formed of bronze is used. It can be characterized.

According to an embodiment, the bronze sintered filter may further include magnetic nanoparticles that are bonded to the surface or penetrated into the surface thereof.

According to an embodiment, the bronze sintered filter is prepared by synthesizing nanoparticles using a magnetic material, adding the pulverized nanoparticles obtained by pulverizing the pulverized nanoparticles to an aqueous alkali solution and stirring to prepare an immersion liquid, A sintered filter formed of powder is immersed in the immersion liquid, but the alkali aqueous solution is an aqueous solution of NaOH or KOH, and the immersion treatment of the sintered filter using the immersion liquid is performed at a temperature of 30 to 80°C for 60 minutes. It is carried out for to 120 minutes, the magnetic nanoparticles may be characterized in that it is included in 1 to 5% by weight based on the total weight of the bronze sintered filter.

According to an embodiment, the exhaust valve comprises: a first flange portion attached to the mask body, a radial ventilation groove formed in the inner center of the first flange portion, and a cylindrical coupling portion formed along the edge of the radial ventilation groove. Exhaust valve frame; An exhaust valve pad that is accommodated in the cylindrical coupling part and seals the radial ventilation groove when the user inhales, and opens the radial ventilation groove when exhaling to discharge air and moisture inside the mask body ; And an exhaust valve cover having a receiving portion in which a plurality of vent holes are formed for air induction, and a second flange portion formed at an edge of the receiving portion and interfacing with the first flange portion.

According to embodiments of the present invention, as the virus sterilization filter mask uses a bronze sintered filter as a sterilization filter, it blocks ultrafine dust in the air and effectively prevents pathogens or viruses from penetrating into the respiratory tract. have.

In addition, as the bronze sintered filter is implemented in an easily detachable form, it is easy to separate and wash and can be used semi-permanently, thereby reducing the amount of mask waste. As a result, it is possible to suppress secondary pollution caused by discharge of the mask waste.

1 is a schematic front view for explaining a virus sterilization filter mask according to embodiments of the present invention.
FIG. 2 is a schematic side view for explaining the virus sterilization filter mask of FIG. 1, and is a view showing a partial view of the internal structure.
3 is an enlarged view of part'A' of FIG. 2.
4 is a view showing the mask body of the virus sterilization filter mask of FIG. 1.
5 is an exploded perspective view illustrating a sterilization filter member of the virus sterilization filter mask of FIG. 1.
6 is an exploded perspective view for explaining an exhaust valve of the virus sterilization filter mask of FIG. 1.
7 is a view for explaining another example of the sterilization filter member, a view corresponding to FIG. 2.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only this embodiment allows the disclosure of the present invention to be complete, and common knowledge in the art It is provided to completely inform the scope of the invention to the possessor, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same elements throughout the specification.

In the present specification, when a member is positioned “on” another member, this includes not only a case where a member is in contact with another member, but also a case where another member exists between the two members. In addition, in the present specification, when a certain part "includes" a certain component, it means that other components may be further included rather than excluding other components unless specifically stated to the contrary.

The terms "about", "substantially", and the like, as used throughout the specification of the present application, are used at or close to the numerical value when manufacturing and material tolerances specific to the stated meaning are presented, and the understanding of the present application To aid in, accurate or absolute figures are used to prevent unfair use of the stated disclosure by unscrupulous infringers.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic front view for explaining a virus sterilization filter mask according to embodiments of the present invention. FIG. 2 is a schematic side view for explaining the virus sterilization filter mask of FIG. 1 and is a view showing a partial view of the internal structure. 3 is an enlarged view of part'A' of FIG. 2. 4 is a view showing the mask body of the virus sterilization filter mask of FIG. 1. 5 is an exploded perspective view illustrating a sterilization filter member of the virus sterilization filter mask of FIG. 1. 6 is an exploded perspective view for explaining an exhaust valve of the virus sterilization filter mask of FIG. 1. 7 is a view for explaining another example of the sterilization filter member, a view corresponding to FIG. 2.

1 to 6, the virus sterilization filter mask 10 according to the embodiments of the present invention not only blocks ultrafine dust in the air, but also prevents pathogens or viruses from penetrating into the respiratory tract. , Since the filter configuration can be attached and detached, only the filter component can be cleaned or replaced, so that wasteful factors in cost can be removed, and the mask body 100, the sterilizing filter member 200, and the exhaust valve 300 ) Can be included.

In detail, the mask body 100 forms the exterior of the virus sterilization filter mask 10, and can be worn on the face (that is, the user's face) to cover the mouth and nose in a closed state from the outside. Is implemented to For example, the mask body 100 may include a mouth cover portion 110 provided to cover the mouth portion and a nose cover portion 120 protruding forward than the mouth cover portion 110 to cover the nose portion. . The lower end of the nose cover 120 is provided with a first through hole 132 used as an inlet of air sucked from the outside, and a second through hole is provided in the mask body 100 on both sides of the mouth cover 110 Each of them 134 may be provided.

A sterilization filter member 200 is mounted on the first through hole 132 to sterilize and purify the air sucked into the mask body 100, and an exhaust valve ( 300) is mounted to exhaust and block exhalation exhaled from the inside of the mask body 100. The first through hole 132 may have a shape of a half ellipse corresponding to the shape of the filter fixing part 210 to be described later, and each of the second through holes 134 may have a circular shape.

The mask body 100 may be made of, for example, a silicon material, and thus may be effectively in close contact with the user's face. Preferably, the mask body 100 is preferably made of silicon having a degree of flexibility and hardness with little change in shape in consideration of safety. At both ends of the mask body 100, wearing holes 140 to which a fixing part (not shown) such as a fixing band is coupled may be formed for the user to wear.

The sterilizing filter member 200 may include a filter fixing part 210, a filter connection part 220, and a bronze sintered filter 230.

The filter fixing part 210 is inserted and coupled to the lower end of the nose cover part 120 and may have, for example, a semi-elliptical ring shape having fastening holes 212. That is, the filter fixing part 210 opens the first through hole 132 of the mask body 100 and may be inserted and coupled to the lower end of the nose cover part 120.

The filter connection part 220 may function as an adapter connecting the bronze sintered filter 230 and the filter fixing part 210 by being coupled to the filter fixing part 210. For example, the filter connection part 220 may have a planar shape corresponding to the filter fixing part 210 in general, and may have a cylindrical opening 222 with open upper and lower surfaces. Fastening protrusions 224 may be provided on one surface of the filter connection part 220, and the fastening protrusions 224 are inserted into the fastening holes 212 of the filter fixing part 210, so that the filter connection part 220 is It may be coupled to the filter fixing part 210. In addition, first threads 226 may be formed on the inner circumferential surface of the filter connection part 220 exposed to the opening 222. The filter fixing part 210 and the filter connection part 220 may be made of a plastic material.

The bronze sintered filter 230 may be detachably coupled to the filter connection part 220. For example, the bronze sintered filter 230 may have a cylindrical shape with an open upper surface, and second threads corresponding to the first threads 226 of the filter connection unit 220 are provided on the outer circumferential surface of the upper surface of the bronze sintered filter 230 232 may be formed. Since the upper portion of the bronze sintered filter 230 is inserted into the opening 222 of the filter connection part 220 in a screw-fastening manner, the bronze sintered filter 230 may be detachably coupled to the filter connection part 220. That is, the bronze sintered filter 230 may be located at the lower end of the nose cover 120 to face each other by being spaced apart from the mouth cover 110, and perpendicular to a direction parallel to the lower end of the nose cover 120 ( That is, it may be coupled to the filter connection unit 220 so as to have a long axis in a direction of 90 degrees). In another example, unlike shown, the upper portion of the bronze sintered filter 230 may have a cylindrical shape with an open upper surface, and the lower portion may have a polygonal cylindrical shape.

The bronze sintered filter 230 may be manufactured as a porous filter of a deep filtration method by processing bronze containing 70 to 90% by weight of copper into a powder form and then sintering it with high heat in a vacuum furnace.

Specifically, the bronze sintered filter 230 is manufactured by putting bronze in the form of powder into a molding mold, properly compressing it with a press, and then heating it to a temperature near the melting point of the bronze powder (eg, 900 to 950°C). I can. The bronze sintered filter 230 is manufactured through a process of forming and sintering into a required shape after classifying the spherical powder into a predetermined particle size. Since the spherical powders are wrapped in layers to form a large amount of voids, the flow is reduced to a bronze sintered filter. When passing through (230), the flow is stabilized in a laminar flow, and impurities larger in size than the pores are filtered. Here, since bronze has a fast sterilization effect and does not generate scale and corrosion compared to brass, it does not generate harmful components to the human body, and has excellent corrosion resistance, durability, and precision.

The bronze sintered filter 230 manufactured as described above may include pores having a size (, diameter) of 3 μm to 5 μm. Accordingly, the bronze sintered filter 230 can block viruses having an average size of 0.4 μm by droplets (the size of the droplets is 5 μm or more). That is, the virus sterilization filter mask 10 using the bronze sintered filter 230 can filter up to 99.9% of PM 2.5 or more ultrafine dust in the air flowing into the mask body 100, and the bronze sintered filter 230 Due to the oligodynamic effect, it can effectively sterilize viruses, microorganisms, and fungi. For example, from the point when the droplet contacts the bronze sintered filter 230, viruses may be sterilized up to about 99.9%.

In addition, as the bronze sintered filter 230 is coupled to have a long axis in a direction parallel to the lower end of the nose cover 120 (ie, 90 degrees), it passes through the bronze sintered filter 230 without being sterilized. Even a very small amount of virus does not flow into the mask body 10 (ie, does not flow into the user's respiratory tract), and may be guided to the lower portion of the bronze sintered filter 230 and extinguished.

In addition, as the bronze sintered filter 230 is implemented to be detachable, if there is a lot of impurities, it can be removed and washed again and reused, so that the utilization can be high. For example, if a disinfectant containing an alcohol component is used, the bronze sintered filter 230 and the mask can be used semi-permanently after washing, and through this, secondary contamination can be suppressed by reducing the discharge amount of mask waste contaminated with viruses. In addition, compared to other filter materials, the bronze sintered filter 230 is resistant to impact even at high temperature and high pressure, and is easy to weld and bond, thereby improving machine precision and durability.

According to another embodiment, the bronze sintered filter 230 may be formed of a composite material of sintered bronze powder and magnetic nanoparticles. That is, the bronze sintered filter 230 may further include magnetic nanoparticles bonded to the surface or penetrated into the surface thereof.

For example, by immersing a sintered filter formed of sintered bronze powder as described above in an immersion solution containing magnetic nanoparticles, a bronze sintered filter 230 in which magnetic nanoparticles are bonded to the surface or penetrated into the surface may be manufactured. have.

Specifically, the magnetic nanoparticles may be obtained by synthesizing the nanoparticles using a magnetic material and then pulverizing the nanoparticles. The obtained magnetic nanoparticles may include at least one component of Co, Fe, Cr, Zn, Mg, Mn, Al, Ni, Nb, Mo, Ag, W, Pt, and Au. For example, magnetic nanoparticles include magnetite (Fe3O4), hematite (α-Fe2O3), maghemite (γ-Fe2O3), ferric trioxide (β-Fe2O3, ε-Fe2O3), iron monoxide (FeO), and ferrite (e.g. For example, it may be CoFe2O4, MnFe2O4, etc.). Synthesis of magnetic nanoparticles can be done using one or more of known methods. For example, the synthesis method is a sintering method in which the components to be synthesized are mixed and sintered under a certain environment, a co-precipitation sintering method in which the precipitate obtained by mixing particles containing metal ions in an aqueous alkali solution is washed, dried, and heat treated, or a high temperature of boiling water. A hydrothermal synthesis method and the like using may be used. The synthesized magnetic nanoparticles may be pulverized using a bead mill, a mixer, a homogenizer, or an ultrasonic cleaner. The pulverized nanoparticles may have a particle size of 100 to 500 nm.

The immersion solution is prepared by adding and stirring the magnetic nanoparticles prepared as described above to an aqueous alkali solution, and the aqueous alkali solution may be, for example, an aqueous solution of NaOH or KOH, but is not limited thereto. The aqueous alkali solution may serve to modify the surface by removing the metal oxide layer formed on the surface of the sintered filter.

The immersion treatment of the bronze sintered filter 230 using the immersion liquid prepared as described above may be performed for 60 to 120 minutes at a temperature of 30 to 80°C. When the immersion temperature or time is out of the above range, the magnetic nanoparticles may not be stably bonded to the surface of the bronze sintered filter 230 or may not sufficiently penetrate into the interior. The immersion-treated bronze sintered filter 230 may be blow-dried. It may be preferable that such immersion treatment and blow drying are repeated at least three times or more.

As in the present embodiment, as the bronze sintered filter 230 is formed of a composite material of sintered bronze powder and magnetic nanoparticles, the filtration efficiency of the bronze sintered filter 230 is further increased due to an increase in surface area and formation of nanopores. In addition, when the user wears the virus sterilization filter mask 10 for a long time, blood circulation is improved due to the geomagnetic (ultra-long wave) effect of magnetic nanoparticles, and fatigue and stress can be relieved.

In the bronze sintered filter 230 of this embodiment, the magnetic nanoparticles may preferably be included in an amount of 1 to 5% by weight based on the total weight of the bronze sintered filter 230. If less than 1% by weight of magnetic nanoparticles is used, the above-described effect may be insignificant, and if it exceeds 5% by weight, the possibility of causing stimulation is high, the increase rate of the effect is not large, and the cost may be increased.

According to another embodiment, as shown in FIG. 7, the sterilizing filter member 200 covers the open upper surface of the chemical filter medium 240 and the bronze sintered filter 230 filled in the bronze sintered filter 230. It may further include a filter cover (250). The chemical filter medium 240 is for removing harmful gases and odors contained in the inhaled air, and may use, for example, renewable activated carbon. The filter cover part 250 is to prevent the chemical filter medium 240 from flowing out of the bronze sintered filter 230, and may use a mesh net formed of bronze, for example. Also in this embodiment, the bronze sintered filter 230 may further include magnetic nanoparticles described above.

Subsequently, referring to FIGS. 1 to 6, the exhaust valve 300 may include an exhaust valve frame 310, an exhaust valve pad 320, and an exhaust valve cover 330.

The exhaust valve frame 310 includes a first flange portion 312 attached to the edge of the second through hole portion 134 of the mask body 100, and a radial ventilation groove 314 formed in the inner center of the first flange portion 312. ), and a cylindrical coupling portion 316 formed along the edge of the radial ventilation groove 314. A plurality of fitting protrusions 317 may be formed on the outer wall of the cylindrical coupling part 316. For example, the exhaust valve frame 310 may be adhered to the mask body 100 using an adhesive material.

The exhaust valve pad 320 is accommodated in the cylindrical coupling portion 316 of the exhaust valve frame 310, and when the user breathes in, the radial ventilation groove 314 of the exhaust valve frame 310 is covered and sealed. When exhaling, the radial ventilation groove 314 of the exhaust valve frame 310 may be opened so that air and moisture inside the mask body 100 may be discharged. The exhaust valve pad 320 may be made of, for example, a silicon material, but is not limited thereto.

The exhaust valve cover 330 is formed on the edge of the receiving portion 332 and the receiving portion 332 in which a plurality of vent holes 334 are formed for air induction, and when combined with the exhaust valve frame 310, the exhaust valve frame A second flange portion 334 for an interview with the first flange portion 312 of 310 may be provided. By inserting the cylindrical coupling portion 316 into the receiving portion 332, the exhaust valve frame 310 and the exhaust valve cover 330 are fitted and coupled, and the fitting protrusions 317 are on the inner surface of the receiving portion 332. It is closely attached to increase the strength of the fitting bond. A support plate (not shown) that presses the exhaust valve pad 320 into contact with the exhaust valve frame 310 may be formed inside the receiving portion 332.

Meanwhile, a fixing groove 313 is formed in the first flange portion 312 of the exhaust valve frame 310, and the exhaust valve cover is positioned at a position corresponding to the formation position of the fixing groove 313 so as to be disposed in the fixing groove 313. A plurality of fixing protrusions may be formed on the bottom surface of the second flange portion 334 of 330. When the exhaust valve frame 310 and the exhaust valve cover 330 are fitted, the exhaust valve cover 330 coupled to the exhaust valve frame 310 is fixed so that it cannot be moved by a fixing protrusion inserted into the fixing groove 313 Can be.

Virus sterilization filter mask 10 according to embodiments of the present invention blocks ultrafine dust in the air by using the bronze sintered filter 230 as a sterilization filter, and pathogens or viruses by droplets penetrate into the respiratory tract. Can be effectively prevented. In addition, as the bronze sintered filter 230 is implemented in an easily detachable form, it is easy to separate and wash, and thus can be used semi-permanently, thereby reducing the amount of mask waste. As a result, it is possible to suppress secondary pollution caused by discharge of the mask waste.

In the present specification, preferred embodiments of the present invention have been disclosed, and although specific terms have been used, these are merely used in a general meaning to easily explain the technical content of the present invention and to aid understanding of the present invention, and the scope of the present invention It is not intended to be limited. It is obvious to those of ordinary skill in the art that other modifications based on the technical idea of the present invention can be implemented in addition to the embodiments disclosed herein.

10: virus sterilization filter mask 100: mask body
200: sterilization filter member 210: filter fixing part
220: filter connection 230: bronze sintered filter
300: exhaust valve

Claims (7)

It is wearable on the user's face to cover the nose and mouth in a state that is blocked from the outside, and the mouth cover part provided to cover the mouth part and the nose protruding forward than the mouth cover part to cover the nose part Mask body including a cover;
A sterilization filter member coupled to the lower end of the nose cover and sterilizing and purifying air sucked into the mask body; And
Exhaust valves respectively provided in the mask body on both sides of the mouth cover part, and exhaust valves for exhausting and blocking exhalation exhaled from the inside of the mask body,
The sterilization filter member,
A filter fixing part inserted and coupled to the lower end of the nose cover part;
A filter connection unit coupled to the filter fixing unit and having a cylindrical opening having an open upper surface and a lower surface thereof; And
A bronze sintered filter that is detachably coupled to the filter connection portion,
The bronze sintered filter is manufactured as a porous filter of a deep filtration method by processing bronze containing 70 to 90% by weight of copper into a powder form and sintering it with high heat in a vacuum furnace,
The bronze sintered filter further includes magnetic nanoparticles bonded to the surface or penetrated into the surface thereof,
The bronze sintered filter is, after synthesizing nanoparticles using a magnetic material, adding the pulverized nanoparticles obtained by pulverizing the pulverized nanoparticles to an aqueous alkali solution and stirring to prepare an immersion liquid, It is prepared by immersing in the immersion solution,
The alkaline aqueous solution is an aqueous solution of NaOH or KOH,
The immersion treatment of the sintered filter using the immersion liquid is performed at a temperature of 30 to 80°C for 60 to 120 minutes,
The magnetic nanoparticles are virus sterilization filter mask, characterized in that contained in 1 to 5% by weight based on the total weight of the bronze sintered filter. The method of claim 1,
First threads are formed on the inner circumferential surface of the filter connection part exposed to the opening,
The bronze sintered filter has a cylindrical shape with an open top surface, and second threads corresponding to the first threads are formed on an outer circumferential surface of the upper surface of the bronze sintered filter,
Virus sterilization filter mask, characterized in that the bronze sintered filter is attached to the filter connection portion detachably by inserting the upper portion of the bronze sintered filter into the opening by screwing. The method of claim 2,
The bronze sintered filter is a virus sterilization filter mask, characterized in that coupled to the filter connection to have a long axis in a direction perpendicular to a direction parallel to the lower end of the nose cover. The method of claim 3,
The sterilizing filter member further includes a chemical filter medium filled in the bronze sintered filter and a filter cover part covering the open upper surface of the bronze sintered filter,
The chemical filter medium is for removing harmful gases and odors contained in the inhaled air, and uses renewable activated carbon,
The filter cover portion is to prevent the chemical filter medium from flowing out of the bronze sintered filter, and a virus sterilization filter mask, characterized in that a mesh net formed of bronze is used. delete delete The method of claim 1,
The exhaust valve is:
An exhaust valve frame having a first flange attached to the mask body, a radial ventilation groove formed at an inner center of the first flange portion, and a cylindrical coupling portion formed along an edge of the radial ventilation groove;
An exhaust valve pad that is accommodated in the cylindrical coupling part and seals the radial ventilation groove when the user inhales, and opens the radial ventilation groove when exhaling to discharge air and moisture inside the mask body ; And
Virus sterilization filter mask, characterized in that it comprises an exhaust valve cover having a receiving portion in which a plurality of ventilation holes are formed for inducing air, and a second flange portion formed at the edge of the receiving portion and interfacing with the first flange portion. .

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