KR20230143780A - A filter-replaceable mask for prevents droplets from leaking - Google Patents

Abstract

The present invention is a filter-replaceable mask that can block the outflow of droplets. In more detail, it covers at least a part of the wearer's face, and is provided with a body portion formed as a curved surface and a central portion of the body portion, so that outside air flows into the inside. It includes an intake valve that allows the air to flow in, and an exhaust valve provided at a lower part of the body portion to allow the internal air to flow out to the outside, wherein the internal air flows directly downward from the wearer's face. It is characterized by allowing it to leak out.

Description

{A filter-replaceable mask for prevents droplets from leaking}

The present invention is a filter-replaceable mask that can block the outflow of droplets. More specifically, the present invention is a filter-replaceable mask that can block the outflow of droplets, which prevents droplets from being spread to others in front by the wearer's exhalation, coughing, and sneezing. It's about.

In general, masks are items that cover the respiratory tract of the nose and mouth to prevent the inhalation or scattering of germs, dust, etc. for health and hygiene purposes. They are worn by workers working in hospitals or hazardous work environments to prevent harmful substances from being inhaled into the human body through the respiratory tract. It is worn as a kind of replacement for cold weather or when catching a cold in winter when temperatures are low, and is also used to protect the user from yellow dust. Recently, the importance of masks has been highlighted due to diseases such as COVID-19.

For example, Republic of Korea Patent No. 10-1025787 (2011.03.23.) discloses a mask with an exhaust valve.

However, in the case of the related art as described above, the air discharged through the exhaust valve is directed to the front, so the exhaled breath of the wearer flows to others in front during conversation and does not pass through the filter, so there is a high risk of spreading droplets, etc. There was a problem.

Republic of Korea Patent No. 10-1025787 (2011.03.23.)

The present invention was developed to solve the problems of the prior art as described above, and prevents the wearer's exhaled breath from being transmitted to others in front and spreading droplets, etc., thereby preventing the spread of infectious diseases, etc. The purpose is to provide a filter-replaceable mask that can block the virus.

The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems to be solved by the present invention that are not mentioned herein can be explained to those skilled in the art from the description below. You will be able to understand it clearly.

In the filter replaceable mask capable of blocking the outflow of droplets according to a preferred embodiment of the present invention, the mask includes a body portion that covers at least a portion of the wearer's face and is formed as a curved surface, and is provided in the center of the body portion, It includes an intake valve that allows air to flow into the inside, and an exhaust valve provided at a lower portion of the body portion to allow the inside air to flow out to the outside, wherein the inside air flows relative to the wearer's face. It is characterized in that it flows out directly downward.

In addition, the body portion according to a preferred embodiment of the present invention is provided on both sides of the body portion, two inlets through which the outside air flows in, and the outside air flowing in through the two inlets. It includes an inflow passage that allows air to flow into the intake valve, and the inflow passage is formed in a 'U' shape to correspond to the body portion, so that the external air flowing in through the two inlets is It is characterized in that it rotates along the inflow passage.

In addition, the body portion according to a preferred embodiment of the present invention further includes a fine dust filter provided in the inlet passage to filter the external air flowing in from the two inlets, and the fine dust filter includes, It is formed in a 'U' shape to correspond to the inlet, and the external air flowing in through the two inlets flows into the fine dust filter from the side of the fine dust filter to the center of the fine dust filter. It is characterized by being filtered by.

In addition, the body part according to a preferred embodiment of the present invention has an empty space formed inside, an outflow chamber provided in a lower part of the body part, and a lower part of the outflow chamber to allow the internal air to flow out. It further includes a droplet blocking filter for filtering, wherein the exhaust valve and the outlet chamber communicate when the exhaust valve is opened, and the internal air passing through the exhaust valve rotates as it interferes with the inner peripheral surface of the outlet chamber. It is characterized in that it flows out to the outside after passing through the droplet blocking filter.

In addition, the droplet blocking filter according to a preferred embodiment of the present invention is characterized in that it is attached to and detached from the outflow chamber.

As a means of solving the above problem, the filter replaceable mask capable of blocking the outflow of droplets of the present invention prevents the spread of droplets to others in front by allowing the wearer's exhaled breath to flow out directly downward based on the wearer's face. It is effective in providing a filter-replaceable mask that can block the outflow of possible droplets.

In addition, in the filter replaceable mask that can block the outflow of droplets of the present invention, droplets discharged from others in front are not transmitted to the wearer by the outer surface member, and two inlets are provided at both ends of the body, so that the exhaled air of others is prevented. There is an advantage in that it can minimize the inclusion of other people's droplets in the air flowing inside by rotating and flowing rather than being directly transmitted to the wearer.

In addition, the filter replaceable mask that can block the outflow of droplets of the present invention has a fine dust filter in a 'U' shape, so that the air flowing in throughout the fine dust filter is filtered, thereby maximizing the filtering efficiency of the fine dust filter. There are benefits to doing this.

In addition, the filter replaceable mask that can block the outflow of droplets of the present invention has separate intake valves and exhaust valves, and applies multiple filters to minimize respiratory resistance, making breathing easy, and the suction at the rear of the filter. It has the advantage of preventing backflow in the direction of the filter through the valve, and blocking the outflow of sneezing/coughing droplets discharged to the front through the droplet blocking filter at the end of discharge.

In addition, the filter-replaceable mask that can block the outflow of droplets of the present invention has the advantage of improving wearing comfort by minimizing weight because the intake valve and exhaust valve are made of a thin film-shaped silicone or rubber material.

In addition, the filter replaceable mask that can block the outflow of droplets of the present invention has flow resistance due to the difference in fiber composition between the fine dust filter on the intake side and the droplet blocking filter on the exhaust side, so that air from exhalation, sneezing, and coughing flows in the direction of the discharge slit. As it flows, there is an advantage in preventing droplets from spreading to others in front.

In addition, in the filter replaceable mask that can block the outflow of droplets of the present invention, the intake valve and exhaust valve can be fixed by passing the protrusions protruding downward through the fixing hole of the inner member, and the fine dust filter and droplet blocking filter are removable. This format has the advantage of making it easy to replace the filter.

In addition, in the filter replaceable mask that can block the outflow of droplets of the present invention, the fiber composition of the fine dust filter (HEPA) is 1 to 10 μm, while the droplet blocking filter at the outlet is 25 to 150 μm, so the flow resistance is high regardless of whether there is a valve or not. Due to the difference, exhalation is guided in the direction of the discharge slit, which has the advantage of primarily blocking the outflow of droplets.

In addition, the filter-replaceable mask capable of blocking the outflow of droplets of the present invention has the advantage of secondaryly blocking the outflow of droplets based on a structure that induces droplets to adhere to the inner peripheral surface of the outflow chamber.

In addition, the filter replaceable mask that can block the outflow of droplets of the present invention utilizes the principle that the intake valve and discharge valve open and close due to the pressure difference between the sealed internal space and the external space, so that the pressure in the packing and internal space is high. In the case of exhalation, the intake valve is blocked to block droplets exiting the fine dust filter, and the exhaust valve is opened to allow exhaled breath to be filtered through the droplet blocking filter and then discharged, which has the advantage of blocking the outflow of droplets in a third way. .

The effects of the present invention are not limited to the effects mentioned above, and the effects of the present invention not mentioned herein will be clearly understood by those skilled in the art from the description below. .

Figure 1 is an assembly diagram showing the configuration of a replaceable filter mask that can block the outflow of droplets according to an embodiment of the present invention.
Figure 2(a) is a diagram showing a closed intake valve of a filter-replaceable mask capable of blocking the outflow of droplets according to an embodiment of the present invention, and Figure 2(b) is a diagram showing the intake valve open. This is a drawing showing .
Figure 3(a) is a view showing the exhaust valve of a replaceable filter mask capable of blocking the outflow of droplets according to an embodiment of the present invention, and Figure 3(b) is a view showing the exhaust valve open. This is a drawing showing .
Figure 4 is a diagram visualizing the outflow of droplets such as exhalation, coughing, and sneezing over time while wearing a conventional exhaust valve mask.
Figure 5 is a longitudinal cross-sectional view showing the internal configuration of a replaceable filter mask capable of blocking droplet outflow according to an embodiment of the present invention.
Figure 6 is a longitudinal cross-sectional view showing the air flow of a replaceable filter mask that can block the outflow of droplets according to an embodiment of the present invention.
Figure 7 is a cross-sectional view showing the internal configuration of a replaceable filter mask capable of blocking droplet outflow according to an embodiment of the present invention.
Figure 8 is a cross-sectional view showing the air flow of a replaceable filter mask that can block the outflow of droplets according to an embodiment of the present invention.
Figure 9 is an enlarged cross-sectional view showing the flow of air inside the outflow chamber of a filter-replaceable mask capable of blocking droplet outflow according to an embodiment of the present invention.
Figure 10 is an enlarged cross-sectional view showing the flow of air inside the outflow chamber of a filter-replaceable mask capable of blocking droplet outflow according to another embodiment of the present invention.

The terms used in this specification will be briefly explained, and the present invention will be described in detail.

The terms used in the present invention are general terms that are currently widely used as much as possible while considering the function in the present invention, but this may vary depending on the intention or precedent of a person working in the art, the emergence of new technology, etc. Therefore, the terms used in the present invention should be defined based on the meaning of the term and the overall content of the present invention, rather than simply the name of the term.

When a part in the entire specification is said to “include” a certain element, this means that it does not exclude other elements but may further include other elements, unless specifically stated to the contrary.

Below, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein.

Specific details, including the problem to be solved by the present invention, the means for solving the problem, and the effect of the invention, are included in the examples and drawings described below. The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings.

Hereinafter, the present invention will be described in more detail with reference to the attached drawings.

Referring to Figure 1, in the filter replaceable mask capable of blocking the outflow of droplets according to a preferred embodiment of the present invention, it includes a body portion 100 that covers at least a portion of the wearer's face and is formed in a curved surface, and An intake valve 200 provided at the center of the body 100 to allow external air to flow into the interior, and an exhaust valve provided at the lower portion of the body 100 to allow internal air to flow out to the outside. Includes 300.

First, the body portion 100 is prepared. The body portion 100 is formed to have an overall ‘U’ shaped cross section. In addition, the body portion 100 includes an inner member 101 that is at least partially in contact with the wearer's face and has a curved shape that covers the wearer's face, and a curved shape that covers the inner member 101. and an outer surface member 102 coupled to the outside of the inner member 101, and an outer surface member 102 coupled to the inner side of the inner member 101 to form an empty gap between the wearer's face and the inner member 101. It may include a packing 103 that prevents the ear from occurring, and an ear hook (not shown) that is provided on one side of the body 100 and is fastened to both ears of the user.

In more detail, the packing 103 is provided in a shape that surrounds the nose and mouth of the wearer, and when the ear hook part is not provided, the packing 103 is made of a friction material so that the packing 103 and the wearer The mask of the present invention may be worn by friction between the faces.

Also, the outer member 102 can be attached to or detached from the inner member 101. That is, a latch (not shown) is provided on the outer member 102, and a locking groove (not shown) is provided on the inner member 101 to attach and detach the outer member 102 from the inner member 101. make it possible Accordingly, there is an advantage that the fine dust filter 120, which will be described later, can be easily replaced, and the outer surface member 102 is formed in plural pieces, each having a different outer peripheral surface, so that a different aesthetic feeling can be provided through replacement. The outer member 102 and the inner member 101 can be formed in any shape as long as they are removable.

In addition, the inner member 101 has a plurality of intake slits 1011 provided at the center of the inner member 101 to allow external air to flow inside, and the plurality of intake slits 1011. A fixing part 1012 is provided to protrude outward from the inner member 101 at the center and accommodates and fixes a fine dust filter 120, which will be described later, and is provided on the lower side of the inner member 101, It includes a plurality of exhaust slits 1013 that allow air to flow to the outside. At this time, the fixing part 1012 is manufactured to protrude by a length that does not interfere with the inner peripheral surface of the outer member 102 when the inner member 101 and the outer member 102 are coupled.

Next, the intake valve 200 is provided. The intake valve 200 covers the plurality of intake slits 1011 in the central portion of the inner member 101 and is provided on the inner surface of the inner member 101. That is, during intake, external air passes through the plurality of intake slits 1011, passes through the intake valve 200, and flows into the wearer's nose or mouth. At this time, the intake valve 200 is a one-way valve that allows external air to flow in the inner direction of the inner member 101 and allows internal air to flow in the outer direction of the inner member 101. It plays a blocking role.

More specifically, the intake valve 200 is formed in the form of a circular membrane made of silicon. Referring to (a) of FIG. 2, the intake valve 200 is normally closed and prevents external air from flowing inside. Referring to (b) of FIG. 2, when the wearer inhales, at least a portion of the intake valve 200 rotates and opens due to a pressure difference, allowing external air to flow inside. . Here, the intake valve 200 includes a circular intake opening and closing member 210 that covers the central portion of the inner member 101, that is, covering the plurality of intake slits 1011, and the intake opening and closing member 210. It may be composed of fixing protrusions 220 that protrude from the top and bottom, respectively. That is, the intake opening and closing member 210 is coupled to the inner member 101 in such a way that the fixing protrusion 220 is inserted into a groove (not shown) formed in the inner member 101, and the intake opening and closing is performed. The member 210 is provided in a form that covers the plurality of intake slits 1011. In this state, when the wearer inhales, the pressure inside the packing 103 decreases and the intake opening and closing member 210 rotates in a direction toward the wearer's face due to a pressure difference, thereby opening the plurality of intake slits. At least part of (1011) is open so that outside air flows into the inside. In addition, when the wearer exhales, the intake opening and closing member 210 is in close contact with the inner member 101 and closes the plurality of intake slits 1011, so that the wearer's exhalation flows through the exhaust valve 300. It leaks out to the outside.

Next, the exhaust valve 300 is provided. The exhaust valve 300 covers the exhaust slit 1013 on the lower side of the inner member 101 and is provided on the outer surface of the inner member 101. That is, during exhalation, the internal air passes through the exhaust valve 300 and flows outward through the exhaust slit 1013. At this time, the exhaust valve 300 is a one-way valve, allowing internal air to flow in the outer direction of the inner member 101, and allowing external air to flow in the inner direction of the inner member 101. It plays a blocking role.

More specifically, the exhaust valve 300 is formed in the form of a square membrane made of silicon. Referring to (a) of FIG. 3, the exhaust valve 300 is normally closed to prevent internal air from flowing to the outside. And, referring to (b) of FIG. 3, when the wearer exhales, the central part of the intake valve 200 is cut due to a pressure difference and opens as it rotates, allowing the air inside to flow to the outside. do. That is, both ends of the exhaust valve 300 are fixed, and as the air pressure in the packing 103 increases or decreases, the central portion of the exhaust valve 300 is cut and pushed or pulled to rotate, causing the exhaust valve 300 to It opens and closes. For example, the exhaust valve 300 includes two exhaust opening and closing members 310 that cover the lower part of the inner member 101, that is, covering the plurality of exhaust slits 1013, and the two exhaust opening and closing members It may be composed of engaging protrusions 320 that protrude from the top and bottom of 310, respectively. That is, the two exhaust opening and closing members 310 are respectively connected to the inner member 101 in such a way that the coupling protrusion 320 is inserted into a coupling groove (not shown) formed in the lower part of the inner member 101. They are combined, and the two exhaust opening and closing members 310 are provided in a form that covers the plurality of exhaust slits 1013. At this time, the engaging protrusion 320 is provided at the upper and lower left sides of the exhaust opening and closing member 310 provided on the left side of the inner member 101, respectively, and the exhaust opening and closing member provided on the right side of the inner member 101. They are provided at the upper and lower right sides of (310), respectively. In this state, when the wearer exhales, the pressure inside the packing 103 increases, the intake valve 200 is closed due to a pressure difference, and the two exhaust opening and closing members 310 are close to the wearer's face. As it rotates in the direction opposite to the direction toward, at least a portion of the plurality of exhaust slits 1013 opens and the air inside flows out to the outside. Additionally, when the wearer inhales, the exhaust opening and closing member 310 comes into close contact with the inner member 101 and closes the plurality of exhaust slits 1013. In other words, when the intake valve 200 is opened, the exhaust valve 300 is closed, and when the intake valve 200 is closed, the exhaust valve 300 is opened and the intake is carried out according to the wearer's breathing. The valve 200 and the exhaust valve 300 are opened and closed alternately.

Here, the exhaust valve 300 allows the air inside to flow out directly downward with respect to the wearer's face. That is, the exhaust slit 1013 is provided on the lower side of the inner member 101 in a direction toward the ground, and the exhaust valve 300 allows the wearer's exhaled air to flow in the direction toward the exhaust slit, The internal air containing the wearer's exhaled breath passes through the exhaust valve 300 and flows out to the outside through the exhaust slit.

For example, referring to Figure 4, in the case of a mask equipped with a conventional exhaust valve, as the wearer's exhalation, that is, the internal air, flows out at an inclination angle (A), the wearer's droplets are transmitted to others in front, causing infectious diseases. There are limits to preventing the spread of such diseases. In contrast, the exhaust valve 300 is provided at the lower part of the body portion 100, and the exhaust slit is provided in a direction toward the ground, so that the exhaust passes through the exhaust valve 300 and flows out into the exhaust slit. The internal air flows out toward the ground directly downward from the wearer's face. Accordingly, there is an advantage in preventing the wearer's droplets from flowing forward and spreading infectious diseases, etc.

Meanwhile, the body portion 100 is provided on both sides of the body portion 100, and has two inlets 110 through which external air can flow in, and the air flows in through the two inlets 110. It includes an inflow passage 111 that allows the external air to flow into the intake valve 200.

More specifically, referring to FIGS. 5 and 6, the two inlets 110 are provided at both ends of the body 100, respectively, according to the combination of the inner member 101 and the outer member 102. An empty space is created for air to flow. In addition, the inlet 111 is formed in a 'U' shape to correspond to the body portion 100, so that the external air flowing in through the two inlets 110 flows into the inlet 111. Make it turn according to . In other words, external air flows into the interior of the body 100 through the two inlets 110, and the introduced air flows into the center of the body 100 along the inlet 111, That is, it flows in the direction toward the intake slit 1011, passes through the intake valve 200, and flows to the wearer's nose and mouth. Here, since the two inlets 110 are provided on both sides of the body 100, there is an advantage in minimizing the transfer of external air containing droplets discharged from others in front to the wearer. . That is, the droplets discharged from others in front are not transmitted to the wearer by the outer surface member 102, and the exhaled air of others is not directly transmitted to the wearer, but rotates and flows, causing the air phase flowing inside. This can minimize the inclusion of other people's droplets in the air.

In addition, the body portion 100 further includes a fine dust filter 120 that is provided in the inlet 111 and filters the external air flowing in from the two inlets 110. At this time, the fine dust filter 120 is seated and fixed on the fixing part 1012, and the fixing part 1012 is formed in a 'U'-shaped curved shape to correspond to the body part 100. In addition, the fine dust filter 120 is formed in a 'U' shape to correspond to the inlet 111, so that the external air flowing in through the two inlets 110 is filtered through the fine dust filter ( It is filtered by the fine dust filter 120 while flowing from the side of the fine dust filter 120 to the central part of the fine dust filter 120. That is, the external air flowing in through each of the two inlets 110 turns and flows in the direction toward the intake valve 200 along the inflow passage 111, and in the flow process, the fine dust filter ( 120). In other words, there is an advantage in that the filtering efficiency of the fine dust filter 120 can be maximized as the air introduced throughout the fine dust filter 120 is filtered. At this time, the fine dust filter 120 may be a HEPA filter, the fiber composition may have a large pore diameter of 1 to 10 μm, and it may be manufactured to have a higher flow resistance than the droplet blocking filter 131, which will be described later. In other words, the fine dust filter 120 is made of a porous material and is manufactured to have pores (pores) with a diameter of 1 to 10 μm, and the porosity or porosity is low compared to the droplet blocking filter 131, which will be described later, so the differential pressure of the filter is high. Accordingly, the filtration rate of air is high.

On the other hand, referring to FIGS. 7 to 9, the body portion 100 has an empty space formed inside, an outflow chamber 130 provided at the lower part of the body portion 100, and the outflow chamber ( It is provided at the lower part of 130) and further includes a droplet blocking filter 131 that filters the outflowing internal air.

In more detail, the outflow chamber 130 provides a space divided from the inflow passage 111 on the lower side of the body 100. At this time, the exhaust valve 300 and the outlet chamber 130 are in communication when the exhaust valve 300 is opened, and the internal air passing through the exhaust valve 300 is directed to the inner peripheral surface of the outlet chamber 130. As it interferes with, it rotates and passes through the droplet blocking filter 131 and then flows out to the outside. In other words, the air flowing in from the two inlets 110 passes through the intake valve 200 and flows to the wearer's nose and mouth, and the internal air discharged from the wearer's nose and mouth flows through the exhaust valve. It passes through (300) and flows into the outflow chamber 130. At this time, the droplets discharged by exhalation collide with the inner circumferential surface of the outflow chamber 130 and settle on the inner circumferential surface of the outflow chamber 130, thereby causing internal air. There is an advantage in minimizing the leakage of internal droplets to the outside. In other words, as the droplets contained in the wearer's exhaled air adhere to the inner peripheral surface of the outflow chamber 130, droplets flowing out to the outside can be minimized. In addition, the air that interferes with the inner peripheral surface of the outflow chamber 130 is filtered by the droplet blocking filter 131 and then passes through the exhaust slit and is discharged to the outside, thereby minimizing the outflow of the wearer's droplets to the outside. There are benefits to doing this.

At this time, the droplet blocking filter 131 may be a metal filter or a non-woven filter, and the fiber composition is formed to have a large pore diameter of 25 to 150 μm. In other words, the droplet blocking filter 131 is made of a porous material and is manufactured to have pores with a diameter of 25 to 150 μm, and the porosity or porosity is higher than the fine dust filter 120, so the differential pressure of the filter is low. More specifically, the fine dust filter 120 is formed to have a smaller large pore diameter than the droplet blocking filter 131 and is manufactured to have higher flow resistance, so that the wearer's exhaled breath is transmitted through the droplet blocking filter. It flows in the direction toward (131). For example, even when the wearer breathes at high pressure due to exercise, etc., there is an advantage in preventing the wearer's exhaled breath from flowing back. Due to the nature of the mask of the present invention, it is important to minimize the weight of the product, and accordingly, the intake valve 200 and exhaust valve 300 are made of a thin film-shaped silicone or rubber material. That is, since a rigid valve that can prevent backflow even under high pressure is not applied, the wearer's exhaled breath may flow back through the intake valve 200 due to rough breathing, causing droplets, etc. to spread forward. Additionally, even when temporarily high pressure occurs, such as coughing or sneezing, droplets, etc., may flow backwards through the intake valve 200 and spread forward. When such exhalation, coughing, and sneezing occur, that is, when the intake valve 200 is refluxed and the exhaust valve 300 is opened at the same time, the temporarily refluxed exhalation, coughing, and sneezing have a relatively lower flow. It flows in a direction toward the droplet blocking filter 131 having resistance. In other words, when the intake valve 200 and the exhaust valve 300 are opened simultaneously, the wearer's exhaled breath, that is, the internal air, is exhausted by the fine dust filter 120, which has a relatively high flow resistance. It flows in the direction toward the valve 300, that is, the droplet blocking filter 131.

Here, the large pore diameter of the droplet blocking filter 131 is formed to be 15 to 25 times larger than the large pore diameter of the fine dust filter 120. At this time, when the large pore diameter of the droplet blocking filter 131 is less than 15 times the large pore diameter of the fine dust filter 120, the air permeability of the droplet blocking filter 131 is low, so that when the wearer exhales, Due to the internal pressure differential of the droplet blocking filter 131, the internal air pressure is maintained in a relatively high state, causing the wearer to feel uncomfortable in breathing, and the high internal air pressure causes the inner member 101 and the wearer to feel uncomfortable. There is a problem that a gap may occur between the faces. In addition, when the large pore diameter of the droplet blocking filter 131 is formed to exceed 25 times the large pore diameter of the fine dust filter 120, the filtering efficiency for droplets is reduced, so that the droplets are exposed to the outside during the wearer's exhalation. There is a problem that pollutants may spread due to leakage. Accordingly, the large pore diameter of the droplet blocking filter 131 is formed to be 15 to 25 times larger than the large pore diameter of the fine dust filter 120.

Table 1 below is an example showing the diameter and area of the pores of each fine dust filter and droplet blocking filter.

division category diameter
[mm] Diameter [mm] Area [mm ² ] Area [μm ² ] case1 case2 case1 case2 case1 case2 Fine dust filter - E11 circle 0.001~0.002 0.001 0.002 7.85 3.14 0.78 3.14 Fine dust filter - H13 circle 0.00005~0.0015 0.0005 0.0015 1.96 1.76 0.19 1.76 division category Diameter (Opening)
[mm] - Area [mm ² ] - Droplet blocking filter - 100mesh Rectangle 0.153 0.023 Droplet blocking filter - 300mesh Rectangle 0.045 0.002

Additionally, the droplet blocking filter 131 is attached to and detached from the outflow chamber 130. For example, it includes a case (not shown) formed to surround the droplet blocking filter 131, and a rail (not shown) provided on the inner peripheral surface of the outflow chamber 130 in a shape corresponding to the case. Thus, the droplet blocking filter 131 can be attached to and detached from the outflow chamber 130 by sliding the case along the rail. Therefore, there is an advantage that the droplet blocking filter 131 can be easily replaced. Here, the case can be prepared by cutting the side of the outflow chamber 130, and can be formed in any shape as long as the droplet blocking filter 131 can be attached to or detached from the outflow chamber 130.

Lastly, referring to FIG. 10, the outflow chamber 130 includes a plurality of protrusions 132 provided on the inner peripheral surface of the outflow chamber 130 in a direction toward the exhaust valve 300, and the plurality of The protrusions 132 may turbulent the air flowing into the outflow chamber 130 through the exhaust valve 300. That is, the plurality of protrusions 132 can primarily induce droplets in the air to adhere, and as the plurality of protrusions 132 and the air interfere, the introduced air becomes turbulent and the droplet blocking filter 131 There is an advantage in that the filtering efficiency of the droplet blocking filter 131 can be improved by allowing it to pass through.

As such, a person skilled in the art will understand that the technical configuration of the present invention described above can be implemented in other specific forms without changing the technical idea or essential features of the present invention.

Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive, and the scope of the present invention is indicated by the claims described later rather than the detailed description above, and the meaning and scope of the claims and their All changes or modified forms derived from the equivalent concept should be construed as falling within the scope of the present invention.

100: body part
101: inner member
1011: intake slit
1012: fixing part
1013: exhaust slit
102: External member
103: packing
110: inlet
111: inlet
120: Fine dust filter
130: outflow chamber
131: Droplet blocking filter
132: projection
200: intake valve
210: Intake opening and closing member
220: fixing protrusion
300: exhaust valve
310: Exhaust opening and closing member
320: Combined protrusion
A: Inclination angle

Claims (5)

A body portion that covers at least a portion of the wearer's face and is formed into a curved surface;
an intake valve provided at the center of the body portion to allow external air to flow into the interior; and
An exhaust valve provided at the lower part of the body portion to allow internal air to flow out to the outside,
The exhaust valve is a filter replaceable mask capable of blocking the outflow of droplets, characterized in that the air inside flows out directly downward with respect to the wearer's face. According to paragraph 1,
The body part,
two inlets provided on both sides of the body to allow external air to flow in; and
It includes an inflow passage that allows the external air introduced through the two inlets to flow to the intake valve,
The inflow passage is formed in a 'U' shape to correspond to the body portion, and the external air flowing in through the two inlets rotates along the inflow passage to block the outflow of droplets. Mask with replaceable filter. According to paragraph 2,
The body part,
It further includes a fine dust filter provided in the inflow passage and filtering the external air flowing in from the two inlets,
The fine dust filter is,
It is formed in a 'U' shape to correspond to the inflow passage,
A filter replacement capable of blocking the outflow of droplets, characterized in that the external air flowing in through the two inlets is filtered by the fine dust filter while flowing from the side of the fine dust filter to the center of the fine dust filter. expression mask. According to paragraph 1,
The body part,
an outflow chamber having an empty space therein and provided at a lower portion of the body; and
It further includes a droplet blocking filter provided at the lower part of the outflow chamber to filter the internal air that flows out,
The exhaust valve and the outlet chamber are in communication when the exhaust valve is opened,
A filter replaceable mask capable of blocking the outflow of droplets, characterized in that the internal air passing through the exhaust valve is rotated as it interferes with the inner peripheral surface of the outflow chamber, passes through the droplet blocking filter, and then flows out to the outside. . According to paragraph 4,
The droplet blocking filter is a replaceable filter mask capable of blocking droplet outflow, characterized in that it is attached to and detachable from the outflow chamber.