KR20220041530A - Transparent mask and method for manufacturing thesame - Google Patents

Abstract

The present invention relates to a transparent mask which is transparent so that the other party can see the entire face of a mask wearer and blows filtered air into a mask to maintain a positive pressure in a breathing space inside the mask, and a manufacturing method thereof. To achieve this, the transparent mask comprises an air blocking film made of a transparent material, blocking external air from entering around the mouth and nose, and forming a breathing space on the face around the mouth and nose and a first filter unit and second filter unit formed at both ends of the air blocking film to filter external air and blow the filtered air into the breathing space to maintain the breathing space in a positive pressure state.

Description

Transparent mask and its manufacturing method

The present invention relates to a transparent mask, and more particularly, by making the mask transparent so that the other party can see the entire face of the mask wearer, and blowing filtered air into the mask, the breathing space inside the mask is in a positive pressure state so that it can be maintained as

In recent years, fine dust has been continuously increasing due to rapid industrialization. The concentration of fine dust is expressed as PM (Particulate Matter) in the atmospheric environment, and the particle size is mostly in the range of 0.001 to 10 μm. Fine dust can be classified into fine dust that is generated in Korea and fine dust that comes from abroad. Most of the fine dust coming from abroad originates from China or Mongolia, and soil components such as silicon, manganese and aluminum are the main components of this fine dust.

Due to China's industrialization, fine dust flowing into Korea from China contains a large amount of heavy metals such as lead and cadmium and harmful chemicals such as dioxins, and the damage is gradually increasing. For reference, it is reported that the concentration of heavy metals contained in yellow dust flowing from China is 2 to 15 times higher than that of general air, 13 times higher for lead, 14 times higher for cadmium, and 21 times higher for chromium.

These heavy metals are known to have a bad effect on the human body. For example, lead paralyzes nerves and muscles, cadmium causes lung cancer, and chromium is known to cause neurological diseases and bronchitis.

As such, it is required to wear a mask in order to reduce various harmful effects caused by fine dust.

Moreover, recently, a new virus such as Corona 19 has emerged, which is atrophying various economic activities and causing enormous disruption to social activities. In the case of Corona 19 virus, it is reported that it is spread by droplets or unfiltered contaminated air.

However, the mask according to the prior art is to cover the mouth, nose and its surroundings. Accordingly, it is not possible to feel a change in facial expression between the people who are facing each other, and thus a sense of disconnection is felt. For these reasons, there is a problem in that a natural atmosphere is not produced unintentionally, but an awkward atmosphere is produced.

Korea Patent Publication 10-2017-0049168 (published on May 10, 2017) Korean Patent Publication 10-2019-0097388 (published on August 21, 2019)

The present invention was devised to improve the above-described problems, and by making a mask with a transparent material, a natural atmosphere in which the opposite party can see the entire face of the mask wearer is created, and is installed on both sides of the filter body The purpose is to allow the mask wearer to breathe with the filtered air by blowing the filtered air through the filter module and the fan into the breathing space inside the mask so that the breathing space can maintain a positive pressure state.

In addition, the present invention blows filtered air through the filter modules and fans installed on both sides of the filter body into the breathing space inside the mask so that the breathing space can maintain a positive pressure state, but the air used for breathing is Another purpose is to ensure that the flow of air used for respiration is made smoothly by allowing it to be discharged to the outside through the contact area of .

The present invention for achieving the above object blocks external air from flowing into the mouth and nose and forms a breathing space in the facial area around the mouth and nose, but the air barrier film formed of a transparent material and the air barrier film A first filter part and a second filter part formed at both ends, respectively, to filter the external air and blow it into the breathing space to make the breathing space a positive pressure state, wherein the first filter part and the second filter part are external It is characterized in that it consists of a fan blowing air into the breathing space and a filter module installed in front of the fan to filter the air flowing into the fan.

In addition, the air barrier membrane of the present invention has a structure in which the left and right portions surround both cheeks, the upper central portion is formed to be caught on the nose, and has a protruding structure to secure breathing space in the facial area including the mouth and nose area. do.

In addition, the air barrier membrane of the present invention is characterized in that it has a structure that forms a gap with the face part so that the air of the breathing space flows out to the outside.

In addition, the air barrier film of the present invention is characterized in that it is a transparent polymer film.

In addition, the air barrier film of the present invention is polycarbonate (PC), acrylonitrile-butadiene styrene (ABS), crystalline polyethylene (A-PET), styrene acrylonitrile butadiene (SAN), polyethylene terephthalate (PET), polyethylene It is characterized in technical configuration to be composed of any one selected from the group.

In addition, the air barrier film of the present invention is characterized in that it includes an edge of the structure that is not in close contact with the face part.

In addition, the filter module of the present invention includes: an outer nonwoven filter that primarily filters bacteria and contaminants in order to filter the air flowing into the fan by driving the fan; A meltblown filter that filters harmful substances or viruses contained in the air that has passed through the outer nonwoven filter and an inner nonwoven filter that filters contaminants contained in the air that has passed through the meltblown filter characterized.

In addition, the filter module of the present invention is characterized in that it includes a filter case and a cover for covering the outer non-woven filter, the melt-brown filter and the inner non-woven filter.

In addition, the present invention further includes a control device, the control device comprising: a current sensor respectively installed in the fan motor of the first filter unit and the second filter unit; a microphone installed in the first filter unit and the second filter unit to respectively input noise generated by the fan; It characterized in that it comprises a controller for compensating for the positive pressure change in the breathing space by controlling the driving of the fan drive unit based on the output signal of the current sensor.

In addition, the controller of the present invention is characterized in that the noise of the fan is removed by controlling the driving of the ANC unit based on the output signal of the microphone.

In addition, the present invention for achieving the above object blocks external air from flowing into the mouth and around the nose and forms a breathing space with the face part around the nose and mouth, but an air blocking film formed of a transparent material is produced. blocking film production step; a first filter unit manufacturing step in which a first filter unit formed at one end of the air barrier membrane to filter the external air and blow it into the breathing space formed by the air barrier membrane to put the breathing space into a positive pressure state; A second filter unit manufacturing step and controller in which a second filter unit formed at the other end of the air barrier film to filter the external air and blow it into the breathing space to make the breathing space a positive pressure state and the controller is the user's breathing or It is characterized in that it includes a positive pressure control step of compensating for the positive pressure in order to prevent the positive pressure in the breathing space from being changed by the environmental change.

In addition, the air pressure of the breathing space of the present invention is characterized in that 0.1 to 0.2 Pa higher than the external air pressure.

According to the transparent mask and its manufacturing method of the present invention, the following effects are obtained.

First, by making a mask with a transparent material, there is an effect of creating a natural atmosphere without awkwardness in which the person facing the mask can see the entire face of the mask wearer.

Second, filtered air is blown into the breathing space inside the mask through the filter modules and fans installed on both sides of the filter body so that the breathing space can maintain a positive pressure state. It has the effect of blocking the inflow of pollutants while allowing comfortable breathing without straining.

Third, due to the air flow in the mask, there is no bad breath and the temperature is balanced with the inside of the mask, so that fogging does not occur when wearing glasses.

Fourth, since the edge of the mask has a structure that floats on the face, there is an effect that skin troubles, stickiness, and cosmetic smearing do not occur.

Fifth, since the filter module can be easily replaced, there is an effect that the transparent mask can be used semi-permanently.

1 is a perspective view of a transparent mask according to the present invention;
2 is an exploded perspective view of a filter unit according to the present invention;
3 (a) and (b) are explanatory views for air inflow and outflow of the transparent mask according to the present invention
4 is an explanatory view showing the air flow in a state in which the transparent mask according to the present invention is worn
5 is a block diagram of an apparatus for controlling a transparent mask according to the present invention;
6 is an explanatory view showing the principle of compensation for atmospheric pressure in the breathing space
7 (a) to (c) are graphs showing the principle of compensating for atmospheric pressure in order to maintain a constant positive pressure in the transparent mask according to the present invention
8 is a flowchart of a transparent mask and a method of manufacturing the same according to the present invention.

The terms or words used in the present specification and claims should not be construed as being limited to conventional or dictionary meanings, and the inventor can properly define the concept of the term to describe his invention in the best way. Based on the principle, it should be interpreted as meaning and concept consistent with the technical spirit of the present invention, and since the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiment of the present invention, the technical spirit of the present invention It should not be regarded as representing all of them, and it should be understood that there may be various equivalents and modifications.

Hereinafter, a preferred embodiment of the information display device according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a transparent mask according to the present invention, FIG. 2 is an exploded perspective view of a filter unit according to the present invention, and FIGS. It is an explanatory view, and FIG. 4 is an explanatory view showing the air flow in a state in which the transparent mask according to the present invention is worn.

Referring to FIG. 1 , the transparent mask 100 according to the present invention blocks external air from flowing into the mouth and nose, and forms a breathing space in the facial area around the mouth and nose, but the air blocking film 110 formed of a transparent material ), the first filter unit 120 and the second filter unit 130 are respectively formed on both ends of the air blocking membrane 110 to filter the external air and blow it into the breathing space to make the breathing space a positive pressure state. may include

The air barrier film 110 is entirely made of a transparent material, so that the other party can see the entire face of the user while the user wears the air barrier film 110 . In addition, the air blocking membrane 110 has a structure in which the left and right portions surround both cheeks and the upper central portion is hooked on the nose, so that the user can wear the transparent mask 100 conveniently without having a fixing means such as a fixing strap. This is possible, of course, in an environment that requires exercise or active force, it may be worn with a separate fixing means such as a fixing strap or an elastic band. And, the air barrier film 110 is formed in a protruding structure to secure a breathing space in the facial part including around the mouth and nose, and has a shape that forms a gap with the facial part so that the air in the breathing space flows out to the outside.

To this end, the air barrier film 110 may be made of a transparent material having an elasticity greater than or equal to a certain value through a mold injection process. The material of the air barrier film 110 is polycarbonate (PC), acrylonitrile-butadiene styrene (ABS), crystalline polyethylene (A-PET), styrene acrylonitrile butadiene (SAN), polyethylene terephthalate (PET), It may be a transparent polymer film such as polyethylene. However, the material of the air barrier film 110 is not limited to the above material, and a material having different characteristics may be used depending on the conditions of use, such as temperature or humidity.

In order to maintain the breathing space in a positive pressure state while the user wears the transparent mask 100, there is no need to keep the air barrier 110 and the user's face in close contact with each other, but rather for the natural outflow of the breathed air As in the above description, it is necessary to have a structure in which a small gap is secured.

In consideration of this, the air barrier film 110 may include an edge 111 having a structure that does not adhere to the face part.

The first filter unit 120 and the second filter unit 130 are respectively fixedly installed at both ends of the air blocking membrane 110 to filter the external air and blow it into the breathing space so that the breathing space is in a positive pressure state. Accordingly, external air does not directly flow into the breathing space without passing through the first filter unit 120 and the second filter unit 130 , and the air in the breathing space does not pass through the edge 111 of the air blocking membrane 110 . ) and the user's face leaks out through the gap. And, the user is able to breathe with the air supplied to the breathing space filtered as described above. The amount of air supplied to the breathing space through the first filter unit 120 and the second filter unit 130 per unit time is not particularly limited, but it is possible to breathe comfortably without straining the user's lungs. can At this time, the pressure difference between the air pressure of the breathing space and the outside (eg, 0.1 to 0.2 Pa) is not particularly limited. For example, when the external atmospheric pressure is 1, the atmospheric pressure in the breathing space may be maintained at 1.2Pa to +1.2Pa.

As a result, the positive pressure of the breathing space formed by the air blocking membrane 110 is the amount of air supplied to the breathing space through the first filter unit 120 and the second filter unit 130 per unit time, and the air blocking membrane 110 . It may be determined by the area of the gap between the edge 111 of the user's face. Therefore, in order to maintain the positive pressure of the breathing space at an air pressure suitable for breathing as described above, the amount of air supplied to the breathing space through the first filter unit 120 and the second filter unit 130 and the gap area are appropriately adjusted. need to be designed properly.

Since the first filter unit 120 and the second filter unit 130 have the same structure, the first filter unit 120 will be described as an example.

Referring to FIG. 2 , the first filter unit 120 is installed in front of a first fan 121 that blows external air into the breathing space and the first fan 121 to be used as the first fan 121 . It may include a first filter module 122 for filtering the incoming air. Here, the first fan 121 and the second fan 131 of the second filter unit 130 will be described as an example each including a fan driving motor (hereinafter, referred to as a 'fan motor').

3 (a) is a diagram showing the air between the nose and the mouth, which is an intermediate point in the breathing space, by the first fan 121 of the first filter unit 120 and the second fan 131 of the second filter unit 130 . It shows that an air gradient is formed as it gathers around it. And, (b) of FIG. 3 shows that the air in the breathing space by the positive pressure formed in the breathing space by the first fan 121 and the second fan 131 passes through the contact area between the air barrier film 110 and the skin in the breathing space. is shown to be ejected.

The first filter module 122 includes an outer nonwoven filter 122B that primarily filters bacteria and contaminants to filter the air flowing into the first fan 121 by driving the first fan 121, A meltblown filter 122C that filters harmful substances or viruses contained in the air that has passed through the outer nonwoven filter 122B and the contaminants contained in the air that has passed through the meltblown filter 122C It may include an inner nonwoven filter (122D) for filtering.

The outer nonwoven filter 122B, the melt brown filter 122C and the inner nonwoven filter 122D are inserted into the filter case 122A and then mounted on the first filter unit 120 in a closed form by the lid 122E. can Therefore, when the transparent mask 100 is used for a certain period of time or more and the outer nonwoven filter 122B, the melt brown filter 122C, and the inner nonwoven filter 122D of the first filter module 122 are contaminated more than the reference value, the user By opening the first cover 123 of the first filter unit 120 and replacing only the first filter module 122 with a new filter module, the transparent mask 100 can be continuously used.

The filters of the first filter module 122 are not limited to the outer non-woven fabric filter 122B, the melt-brown filter 122C, and the inner non-woven fabric filter 122D, but may include other filters as necessary.

In the above description, the first filter unit 120 is installed in the horizontal direction at the end of one side (eg, the left side) of the air blocking membrane 110 , and the second filter unit 130 is installed on the other side of the air blocking membrane 110 (eg: Right) An example was installed in the horizontal direction at the end.

In this case, the first fan 121 of the first filter unit 120 may be installed near the left ear, and the second fan 131 of the second filter unit 130 may be installed near the right ear. Accordingly, the user's hair may be sucked into the first fan 121 or the second fan 131 . In order to prevent this, a net for preventing hair entry may be installed on the first cover 123 of the first filter unit 120 and the second cover 133 of the second filter unit 130 . As another example, the direction of the air intakes of the first fan 121 and the second fan 131 may be installed in a direction that minimizes the influence of hair. As another example, the installation position of the first fan 121 or the second fan 131 may be installed in an area not affected by hair (eg, chin).

4, the user breathes with the filtered air supplied to the breathing space supplied through the first filter unit 120 and the second filter unit 130, and the breathed air is 111) and escapes to the outside through the space between the face. To this end, as in the above description, the edge 111 needs to be designed to be floating without being in close contact with the user's face.

5 is a block diagram of a control device for a transparent mask included in the transparent mask according to the present invention, FIG. 6 is an explanatory diagram illustrating the principle of compensation for atmospheric pressure in the breathing space, and FIGS. It is a graph showing the principle of compensating for atmospheric pressure in order to maintain a constant positive pressure in the transparent mask according to the present invention.

Referring to FIG. 5 , the transparent mask control device 140 according to the present invention includes a first current sensor CS1 and a second fan 131 installed in the fan motor of the first fan 121 of the air barrier 110 . The second current sensor CS2 installed in the fan motor of 2 Controls the operation of the fan driver 142 based on the output signals of the second microphone MIC2 and the current sensors CS1 and CS2 for inputting noise generated from the fan 131, thereby increasing the positive pressure caused by the user's breathing. The noise of the first fan 121 and the second fan 131 is reduced by compensating for the change and controlling the operation of the ANC unit 143 based on the output signals of the first and second microphones MIC1 and MIC2. Power required by each part of the controller 141 to remove, the short-range wireless communication unit 144 supporting short-range wireless communication between the user's terminal (eg, a smartphone) and the controller 141 and the transparent mask 100 It may include a power supply unit 145 to supply.

Even if the first fan 121 of the first filter unit 120 and the second fan 131 of the second filter unit 130 are rotated at a constant speed, the positive pressure (air pressure) of the breathing space is maintained at the target value, the user can breathe , the positive pressure is periodically changed as shown in (a) of FIG. 7 . That is, the positive pressure is increased by the user's exhalation, and the positive pressure is decreased by the inhalation. However, it is possible to keep the positive pressure constant by the following positive pressure compensation operation.

When the user breathes in (inhalation), the air pressure in the breathing space is reduced as shown in FIG. 6 (a), whereby the resistance of the first fan 121 and the second fan 131 is changed. That is, the resistance of the first fan 121 and the second fan 131 in the inhalation is reduced. Accordingly, the amount of current flowing through the fan motor of the first fan 121 and the fan motor of the second fan 131 is changed (eg, increased). It is possible to detect the changed amount of current through

Therefore, through the process as described above in advance, the first current sensor (CS1) the change in the current of the fan motor of the fan motor of the first fan 121 and the fan motor of the second fan 131 according to the user's breathing (inhalation and exhalation) and the second current sensor (CS2), and then detects the change in air pressure in the breathing space. Then, a database regarding the change in atmospheric pressure and change in current is established.

And, later, the controller 141 is a fan of the first fan 121 in order to compensate the air pressure in the breathing space based on the amount of current detected through the first current sensor CS1 and the second current sensor CS2. Controls the driving of the motor and the fan motor of the second fan 131 . For example, as shown in (b) of FIG. 7 , the controller 141 controls the driving of the fan driving unit 142 in a section in which the air pressure in the breathing space is increased by exhalation, so that the first fan 121 and the second fan Let the rotational speed of (131) decrease to a degree corresponding to the increase in atmospheric pressure. And, in the section where the air pressure in the breathing space is lowered by inhalation, the driving of the fan driving unit 142 is controlled so that the rotational speeds of the first fan 121 and the second fan 131 are increased to a degree corresponding to the drop in air pressure. do. Accordingly, the positive pressure in the breathing space is maintained in a constant state as shown in FIG. 7 ( c ) regardless of the user's breathing.

As described above, the change in air pressure in the breathing space due to the user's respiration is not detected using a separate air pressure sensor, but a change in the current of the fan motor can be detected and recognized, thereby reducing costs. In addition, it is possible to simplify the manufacturing process of the air barrier film 110 .

Noise may be generated around both ears of the user by driving the first fan 121 of the first filter unit 120 and the second fan 131 of the second filter unit 130 . However, noise can be removed by the following active noise cancellation (ANC) operation.

The first microphone MIC1 converts noise generated from the first fan 121 of the first filter unit 120 into an electric signal and outputs it, and the second microphone MIC2 is the second microphone of the second filter unit 130 . 2 The noise generated by the fan 131 is converted into an electric signal and output. To this end, the first microphone MIC1 may be installed around the first fan 121 , and the second microphone MIC2 may be installed around the second fan 131 .

The controller 141 pre-processes the audio signal supplied from the first microphone MIC1 and the audio signal supplied from the second microphone MIC2, respectively, and outputs it to the ANC unit 143, and the ANC unit 143 drive it Accordingly, the ANC unit 143 generates an offset signal whose phase is opposite to that of the audio signal of the first microphone MIC1 and outputs it to the first fan 121 side, thereby generating a signal generated from the first fan 121 . noise is removed In addition, the ANC unit 143 generates an offset signal opposite in phase to the audio signal of the second microphone MIC2 and outputs it to the second fan 131 , thereby generating noise from the second fan 131 . this is removed

The short-range wireless communication unit 144 supports short-range wireless communication between the user's terminal and the controller 141 . Accordingly, the user can control the positive pressure of the transparent mask 100 or the noise removal operation using the terminal.

The power supply unit 145 supplies power required by each part of the transparent mask 100 . To this end, the power supply unit 145 may include a rechargeable battery, and may receive power from the outside through the USB port 145A to charge the rechargeable battery.

As another embodiment of the present invention, heater coils are respectively installed around the first fan 121 and the second fan 131, and the controller 141 determines the ambient temperature based on the temperature sensing signal of the temperature sensor. The heater coil is driven when it is determined that the temperature is lowered below the stationary level. Accordingly, it is possible to supply heated warm air to the breathing space.

Meanwhile, FIG. 8 is a flowchart of a method of manufacturing a transparent mask according to another exemplary embodiment of the present invention.

Referring to FIG. 8, the method for manufacturing a transparent mask according to the present invention blocks external air from flowing into the mouth and around the nose and forms a breathing space with the face part around the nose and mouth, but the air blocking film formed of a transparent material Air barrier film production step (S1) to be manufactured; A first filter unit manufacturing step (S2) in which the first filter unit is formed at one end of the air barrier film to filter the outside air and blow it into the breathing space formed by the air barrier film to put the breathing space into a positive pressure state; A second filter unit manufacturing step (S3) formed at the other end of the air blocking membrane 110 to filter the outside air and blow it into the breathing space to produce a second filter unit that puts the breathing space into a positive pressure state; and a positive pressure control step (S4) in which the controller compensates for the positive pressure in order to prevent the positive pressure in the breathing space from being changed by the user's respiration or changes in the environment.

In the air barrier film manufacturing step (S1), the air barrier film 110 prevents external air from flowing into the mouth and around the nose while the user is wearing the transparent mask 100 and forms a breathing space with the nose and the face around the mouth. ) is produced. Here, the air barrier film 110 is manufactured to have a shape to form a gap with the face part so that the air of the breathing space flows out to the outside. In addition, since the entire air barrier 110 is made of a transparent material, the other party can see the entire face of the user while the user wears the air barrier 110 .

In the first filter unit manufacturing step (S2), the first filter unit 121 is formed at one end of the air blocking membrane to filter the external air and blow it into the breathing space to bring the breathing space into a positive pressure state. . Here, the first filter unit 120 is installed in front of a first fan 121 that blows external air into the breathing space and the first fan 121 and the air introduced into the first fan 121 . A first filter module 122 for filtering is manufactured.

In the second filter unit manufacturing step (S3), the second filter unit 121 is formed at the other end of the air blocking membrane to filter the external air and blow it into the breathing space to bring the breathing space into a positive pressure state. . Here, the second filter unit 130 is installed in front of a second fan 131 that blows external air into the breathing space and the second fan 131 and the air introduced into the second fan 131 . A second filter module 122 for filtering is manufactured.

In the positive pressure control step (S4), the controller 141 detects a change in atmospheric pressure in the breathing space, and controls the driving of the fan motor of the first fan 121 and the fan motor of the second fan 131 according to the change in atmospheric pressure. By controlling the air pressure in the breathing space is always maintained in a constant state.

The configuration shown in the embodiments and drawings described in the present specification as described above is merely the most preferred embodiment of the present invention and does not represent all of the technical spirit of the present invention, so various equivalents and modifications that can be substituted for them It should be understood that there may be examples.

100: transparent mask 110: air barrier film
111: edge 120: first filter unit
121: first fan 122: first filter module
122A: filter case 122B: inner nonwoven filter
122C: melt brown filter 122D: outer non-woven filter
123: first cover 130: second filter unit
131: second fan 132: second filter module
133: second cover 140: control device
141: controller 142: fan driving unit
143: ANC Department 144: Short-distance wireless communication department
145: power supply 145A: USB port

Claims (11)

Block the inflow of external air into the mouth and nose and form a breathing space in the facial area around the mouth and nose. A first filter unit and a second filter unit for blowing the breathing space into a positive pressure state by blowing into the breathing space, wherein the first filter unit and the second filter unit include a fan blowing the outside air into the breathing space and the fan. Transparent mask comprising a filter module installed in front to filter the air flowing into the fan.
The method of claim 1,
The transparent mask, characterized in that the left and right portions surround both cheeks, the upper central portion is formed in a structure that catches the nose, and is formed in a structure that protrudes so as to secure a breathing space in the face portion including the mouth and nose area.
3. The method of claim 1 or 2,
The air blocking film is a transparent mask, characterized in that the gap with the face part is formed so that the air of the breathing space flows out to the outside, and an edge that is not in close contact with the face part is further included.
3. The method of claim 1 or 2,
The transparent mask, characterized in that the air barrier film is a transparent polymer film.
3. The method of claim 1 or 2,
The air barrier film is selected from polycarbonate (PC), acrylonitrile-butadiene styrene (ABS), crystalline polyethylene (A-PET), styrene acrylonitrile butadiene (SAN), polyethylene terephthalate (PET), and polyethylene. A transparent mask, characterized in that it is composed of any one.
The method of claim 1,
The filter module may include: an outer nonwoven filter that primarily filters bacteria and contaminants in order to filter the air flowing into the fan by driving the fan; A meltblown filter that filters harmful substances or viruses contained in the air that has passed through the outer nonwoven filter and an inner nonwoven filter that filters contaminants contained in the air that has passed through the meltblown filter Characterized by a transparent mask.
7. The method of claim 6,
The filter module is a transparent mask comprising a filter case and a cover for covering the outer non-woven filter, the melt-brown filter and the inner non-woven filter.
The method of claim 1,
Further comprising a control device, the control device comprising: a current sensor respectively installed in the fan motor of the first filter unit and the second filter unit; microphones respectively installed in the first filter unit and the second filter unit to input noise generated by the fan; Transparent mask comprising a controller for compensating for the positive pressure change in the breathing space by controlling the driving of the fan drive unit based on the output signal of the current sensor.
9. The method of claim 8,
and the controller controls driving of the ANC unit based on the output signal of the microphone to remove the fan noise.
an air barrier film manufacturing step in which an air barrier film formed of a transparent material is manufactured to block external air from flowing into the mouth and around the nose and to form a breathing space and a face around the nose and mouth; a first filter unit manufacturing step of manufacturing a first filter unit formed at one end of the air barrier film to filter the external air and blow it into the breathing space formed by the air barrier film to put the breathing space into a positive pressure state; A second filter part manufacturing step and controller in which a second filter part is formed at the other end of the air blocking membrane to filter the external air and blow into the breathing space to make the breathing space a positive pressure state and the controller is the user's breathing or and a positive pressure control step of compensating for the positive pressure in order to prevent the positive pressure in the breathing space from being changed due to changes in the environment.
11. The method of claim 10,
The air pressure in the breathing space is 0.1 to 0.2 Pa higher than the external air pressure, a transparent mask manufacturing method, characterized in that.

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