KR20180070965A - Filter for respirator - Google Patents

Abstract

The present invention relates to a filter for a respirator comprising a crease-shaped filter member and a flexible frame. The crease-shaped filter member includes a plurality of crease tips and forms a first valley pattern among each of the crease tips. The flexible frame is combined with an edge of the crease-shaped filter member and includes a connection unit, a first support unit, and a second support unit, wherein the first support unit and the second support unit protrude from the connection unit. The first support unit includes a bending support unit and a plurality of protrusion units, wherein the protrusion units protrude from the bending support unit and are respectively combined with the crease tips. Both ends of the crease-shaped filter member are combined with the second support unit. According to the present invention, the filter for the respirator is able to improve a filter performance; is able to improve a lifecycle; is able to easily transform a shape; is able to be easily attached and detached; and is able to minimize interference in attachment. Even though the shape of the filter for the respirator is transformed, the filter performance is able to be maintained.

Description

{FILTER FOR RESPIRATOR}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a filtration filter for oil stagnant, and more particularly to a filter for a breathing guard.

The respiratory protection typically includes one or more filter cartridges attached to the mask body and the mask body. The mask body may be worn over the nose and mouth on the face of a person, and in some cases, covering the head, neck, or other body part. The wearer can use the clean air that has passed through the filter disposed in the filter cartridge. In a negative pressure respiratory protection device, air is drawn through the filter cartridge by negative pressure produced by the wearer during inhalation. Air from the external environment passes through the filter medium and enters the interior space of the mask body through which the wearer can draw in.

Various techniques have been used as filter cartridges for use in respirators. The conventional filter cartridge generally includes a filter member having an air-purifying function inside a frame made of a plate, a non-woven fabric, or plastic. However, when the frame is formed of a rigid plate, a nonwoven fabric, or a resin, the adhesion between the filter cartridge and the outer wall of the space in which the filter cartridge is mounted is insufficient, causing leakage of air, have. Furthermore, there is also a problem that mounting is difficult because of friction with a rigid frame during the mounting process.

An object of the present invention is to provide a filter for a breathing guard which is easy to deform, easy to attach and detach, and minimizes interference during installation by using a flexible frame having elasticity.

Another object of the present invention is to provide a filter for a respirator that maintains filter performance even when the shape of the flexible frame is changed.

It is still another object of the present invention to provide a filter for a breathing guard which can improve the filter performance and improve the service life by using a pleated filter member.

According to an aspect of the present invention, there is provided a filter for a respiratory protection device, A corrugated filter member having a plurality of corrugation tips and a first valley pattern formed between the corrugation tips and a first support portion coupled to an edge of the corrugated filter member and projecting from the connection portion and the connection portion, Wherein the first support comprises a flexure support and a plurality of protrusions protruding from the flexure support and each coupled to the pleated tip, wherein both ends of the pleated filter member And is coupled with the second support portion.

A second valley pattern may be formed between the plurality of protrusions, and a depth of the first valley pattern may be greater than a depth of the second valley pattern.

The height of the second support portion may be equal to the sum of the height of the bending support portion and the protrusion of the first support portion.

The ratio of the height of the flexure support to the height of the protrusion may be between 1: 1 and 1: 2.

The flexible frame may include a thermoplastic elastomer (TPE).

The Shore A hardness of the flexible frame may be 35 to 45. [

The respiratory protection filter may have a radius of curvature of 40 mm or more.

The filter for a respirator according to the present invention can improve the filter performance, the life can be improved, the shape can be easily deformed, the fitting and detachment can be easily performed, and the interference during mounting can be minimized. In addition, the filter performance can be maintained even if the shape of the filter for the respirator is modified.

1 is a perspective view of a filter for a respirator according to the present invention.
2 is a side view of a flexible frame according to the present invention.
3 is a cross-sectional view of a filter having a curvature according to the present invention.
4 is a cross-sectional view taken along line I-I 'of Fig.

In the following detailed description, reference is made to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration some specific embodiments. It should be understood, however, that other embodiments may be contemplated without departing from the scope or spirit of the invention. Accordingly, the specific details for carrying out the invention are not to be taken in a limiting sense.

All scientific and technical terms used herein have the same meaning as commonly used in the art unless otherwise specified. The definitions provided herein are intended to facilitate understanding of certain terms frequently used herein and are not meant to limit the scope of the present invention.

Unless otherwise indicated, all numbers expressing feature sizes, amounts, and physical characteristics used in the specification and claims are to be understood as being modified in all instances by the term "about ". Accordingly, unless indicated to the contrary, the numerical parameters set forth in the foregoing specification and attached claims are approximations that may vary depending upon the desired properties sought to be obtained by those skilled in the art using the teachings herein.

As used in this specification and the appended claims, the singular forms "a", "an" and "the" include embodiments having a plurality of referents unless the context clearly dictates otherwise . As used in this specification and the appended claims, the term "or" is generally used to include "and / or" in its meaning unless the context clearly dictates otherwise.

As used herein, spatially related terms, including but not limited to "lower," "upper," "lower," "lower," "above, Is used to describe the spatial relationship of the element (s) to the element. These spatially related terms encompass different orientations of the device in use or in operation, as well as the particular orientations shown in the drawings and described herein. For example, if the objects shown in the figures are inverted or inverted, there will be portions previously described as being below or underneath other elements over those other elements.

In the present specification, in the case of the description of the positional relationship, for example, the positional relationship between the two parts is described as 'on', 'above', 'below', and 'next to' , There may be more than one other part between the two parts, unless the expressions " right " or " direct " are used.

In the present specification, when "having", "including", "having", and the like are used, they are used in their open sense, and other matters other than those described are added unless the expression " .

The term "respiratory protection" refers to a device that is worn by humans and filters air before the air enters a person's respiratory system.

The term "mask body" refers to a structure that at least aligns with the nose and mouth of a person and aids in defining an internal air gap separated from the external air gap.

The term "filter cartridge" refers to a device that can be attached to a respirator prior to entering the interior air space between the mask body and the human face for the purpose of filtering air.

The term "integral" refers to being made at the same time, or that one or more of the integral parts can not be separated without damage.

The term "outside air" refers to air containing other materials that can be harmful to humans, such as contaminants.

The term "filtered air" refers to air in which contaminants have been removed as the outside air passes through the filter.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Each of the features of the embodiments of the present invention can be combined or combined with each other partly or entirely, and technically various interlocking and driving are possible.

1 is a perspective view of a filter for a respirator according to the present invention. 2 is a side view of a flexible frame according to the present invention. 3 is a cross-sectional view of a filter having a curvature according to the present invention. 4 is a cross-sectional view taken along line I-I 'of Fig.

1 to 4, the respiratory protection filter 10 includes a pleated filter member 100 and a flexible frame 200.

The corrugated filter element 100 has a plurality of corrugated tips 110 and a first valley pattern 120 is formed between the plurality of corrugated tips 110. External air flows into the upper surface of the pleat filter member 100 and the filtered air passes through the pleat filter member 100 so that the filtered air can be discharged to the lower surface of the pleat filter member 100.

The pleated filter element 100 has a filter effective area larger than that of the planar filter element, thereby improving the filter performance and improving the lifetime. In addition, the introduced outside air passes through the corrugated filter member 100 while moving along the first valley pattern 120. As a result, uniform distribution of the outside air is possible, and filtered substances such as contaminants can be uniformly and slowly accumulated on the upper surface of the pleated filter member 100, and the life of the filter can be improved while maintaining the filter performance .

The distance between adjacent pleat tips 110 will vary depending on the size of the filter and its use, including the thickness of the pleated filter element 100, the height of the pleat tip 110, the distance between adjacent pleat tips 110, Can be determined from a relational expression between filter performance constants. For example, the distance between the pleat tips 110 adjacent to each other in the filter 10 for the breathing guard may be 3 mm to 6 mm, preferably 4.1 mm to 4.3 mm.

As the pleated filter member 100, any substance can be used without restriction as long as it can communicate with air but does not allow a specific substance to pass therethrough. Non-limiting examples of the pleated filter member 100 include a nonwoven fabric, a woven fabric, a paper, and the like, but the kind thereof is not limited thereto. There is no limitation on the method of forming the corrugation of the corrugated filter member 100. For example, folds can be formed by folding or texturing flat filter elements.

In order to enhance the air purification effect of the pleated filter member 100, a surface-treated material may be used. There is no limitation on the method of surface treatment, and the method of surface treatment may be changed depending on the application. In the case of a filter used in a dusty or dusty place or a filter used in a case where a large amount of air needs to be introduced quickly, the material and the surface treatment method of the filter member suitable for each case may be different from each other. For example, in the case of a nonwoven fabric, electrostatic treatment may be performed, and the surface may be treated with activated carbon.

The flexible frame 200 is engaged with the edge of the pleated filter member 100. In addition, the flexible frame 200 and the pleated filter member 100 may be integrally formed. That is, the adhesive for sealing can be omitted between the flexible frame 200 and the pleat filter member 100, and the problem caused by the sealing using the adhesive can be prevented.

In addition, only the upper surface of the pleated filter member 100 is exposed to the outside air, and only the filtered air is discharged to the lower surface. That is, no external air is introduced into the side surface of the pleat filter member 100, and the filter performance can be maintained.

The flexible frame 200 may be formed of a flexible and elastic frame material. The Shore A hardness of the flexible frame may be from about 35 to about 45. [ The flexible frame 200 according to the present invention is superior in elasticity to the rigid paper, nonwoven fabric, or resin used as a conventional filter frame, and is easy to mount and detach the filter 10 for a breathing guard at a desired position, And the sealing property between the filter mounting region and the filter mounting region is excellent. In addition, it is possible to form the frame at the edge of the filter member without a separate adhesion process.

For example, the flexible frame 200 includes a thermoplastic elastomer (TPE). Thermoplastic elastomers are polymeric materials that can be molded in the same way as plastics that become soft at high temperatures and exhibit the properties of rubber elastomers at room temperature.

The thermoplastic elastomer can be used as it is for ordinary thermoplastics processing, and it can be reused at the time of machining, which is economical and does not require the use of a plasticizer. In addition, it has lower specific gravity than thermosetting rubber, it is easy to control quality, and it is possible to use high-productivity processing equipments such as injection molding (blow molding), and it is possible to diversify product production through partial change of hard part and soft part. So that it is easy to design. That is, the thermoplastic elastomer is a polymeric material that exhibits rubber elasticity under use conditions and can be formed as a thermoplastic plastic under molding conditions.

The flexible frame 200 may be formed of a material that may exist in a fluid state including liquid, syrup, wax or melt at a specific temperature. For example, the filter 10 for a respiratory protection including the flexible frame 200 can be manufactured by hardening or solidifying a material that may exist in a fluid state at a specific temperature.

For example, a method of manufacturing the filter 10 for a respiratory protective device includes: bending a filter member and cutting it to a desired size; Inserting the bent filter member into the mold in conformity with the shape; Heating the frame material to a temperature above the softening point or melting point and allowing the frame material to melt and remain in a fluid state; And applying and solidifying the flowable frame material to the rim of the folded filter element. As a result, the breathing protection filter 10 including the flexible frame 200 integrally formed with the pleated filter element 100 can be manufactured.

Herein, the fluidity state includes both liquid state, syrup state, and wax state. Further, the solidification can be achieved by cooling, and for example, the frame material in a fluid state can be solidified by cooling at room temperature or below.

More specifically, the method for manufacturing the filter 10 for a breathing guard comprises the steps of: placing a filter member bent in a primary mold having a mounting portion of a concavo-convex shape capable of mounting a filter member; Disposing a secondary mold on the filter member so that only the edge of the filter member is exposed while fixing the filter member; Further comprising the steps of disposing a third mold so that the filter member can be positioned in the opening using a third mold having an opening larger than the area of the filter member; Injecting a frame material in a fluid state into an edge of the filter member not covered by the secondary mold; And solidifying the frame material in the fluid state.

A sealing process using a hot gun or the like is required between the filter member and the frame in the related art, and it is difficult to fix the filter member in the sealing process, and in particular, in the case of the pleated filter member, .

However, the filter 10 for a breathing guard, which includes the flexible frame 200 integrally formed with the pleated filter element 100 manufactured by the above-described method, has a sealing function using a separate adhesive for bonding the filter element and the frame, The process can be omitted, the process can be simplified, and problems such as defective sealing can be prevented when an adhesive is used.

The flexible frame 200 includes a connection part 210 and a support part protruding from the connection part 210. The support portion includes a first support portion 220 and a second support portion 230. The connection portion 210, the first support portion 220, and the second support portion 230 may be integrally formed.

The first support portion 220 and the second support portion 230 may define a side wall of the flexible frame 200. The connecting portion 210 may be formed in a closed form having an opening exposing the lower surface of the pleated filter member 100 and connecting the lower ends of the first and second supporting portions 220 and 230 . At this time, the connection portion 210 may include a laterally protruding flange for mounting or the like.

The first support portion 220 includes a flexure support portion 221 and a plurality of protrusions 222. The plurality of protrusions 222 protrude from the bending support 221 and are respectively engaged with the pleat tips 110 of the pleated filter member 100. That is, one protrusion 222 corresponds to one wrinkle tip 110.

The protrusion 222 of the flexible frame 200 and the pleat tip 110 of the pleat filter element 100 move together so that the distance between adjacent pleat tips 110 can be kept constant. Thus, uniform air distribution is possible over the entire surface of the pleated filter member 100, and the filter performance can be maintained evenly.

A second valley pattern 223 is formed between the plurality of protrusions 222. The flexible frame 200 having the second valley pattern 223 is easy to deform in shape, and has a certain curvature and is easy to bend and deform. Furthermore, when the filtered air is bent so as to have a radius of curvature toward the bottom side of the filter member to be discharged, the deformation is easier.

If the filtered air is bent to have a radius of curvature on the bottom side of the exhausted filter element, interference can be minimized when mounted on a respirator or when the filter is mounted on a respirator and then mounted on a welding shield or the like. Furthermore, it is possible to prevent breakage due to interference when mounted on a respirator, a welding shield or the like.

In addition, the depth of the first valley pattern 120 formed between the plurality of corrugation tips 110 is larger than the depth of the second valley pattern 223. Accordingly, the tip portion of the first valley pattern 120 is engaged with the bending support portion 221 of the first support portion 220.

The bending supporting portion 221 has a single straight structure. The flexure support portion 221 may prevent excessive flexure of the flexible frame 200 and may maintain a constant radius of curvature so that the distance between adjacent pleat tips 110 may be maintained constant.

Excessive flexing of the flexible frame 200 widens the distance between the pleat tips 110 on the air inlet side of the pleat filter element 100 so that the distance from the pleat tips 110 is not constant, So that the distance between the tips of the first valley pattern 120 on the surface becomes narrower. This increases the pressure drop and can shorten the service life of the filter 10 for the respirator.

However, the respiratory protection filter 10 according to the present invention can maintain the pressure drop almost constant even if the curvature is increased (even if the radius of curvature is reduced). Preferably, such a respiratory protective filter 10 may have a radius of curvature of about 40 mm or greater.

Referring to FIG. 3, distances d between adjoining pleat tips 110 are constant, and distances d 'between tips of adjacent first valley patterns 120 are constant, respectively. It is possible to exhibit a uniform filter performance over the entire region of the filter when the distance d between the adjacent corrugated tips 110 and the distance d 'between the neighboring first valley pattern 120 tips are constant, , The service life can be improved.

Therefore, the filter 10 for a respiratory protective device according to the present invention is configured such that the distance between the pleat tips 110 on the air inlet side of the pleat filter element 100 and the distance between the pleat tips 110 of the pleat filter element 100 The distance between the tips of the first valley pattern 120 on the surface can be maintained at a constant interval and a constant pressure drop performance can be maintained up to a desired curvature.

When the height ratio of the protruding portion 222 to the height of the flexural support portion 221 is increased, it is advantageous to deform the flexible frame 200, but excessive flexure can be generated. Conversely, if the height ratio of the bending support portion 221 to the height of the protruding portion 222 becomes large, the shape deformation of the flexible frame 200 and the pleated filter member 100 may be difficult. Therefore, the ratio of the height of the flexural support portion 221 to the height of the protruding portion 222 is preferably in the range of about 1: 1 to about 1: 2.

The second support portion 230 is engaged with both ends 101 of the pleated filter element 100. Preferably, the distal end 101 of the pleated filter member 100 extends toward the upper surface side of the pleated filter member 100, and the edge of the pleated filter member 100 can be engaged with the second support portion 230 have.

The height of the second support portion 230 may be equal to the sum of the height of the bending support portion 221 and the protrusion 222 of the first support portion 220. That is, the height of the second support portion 230 and the height of the first support portion 220 may be the same. The second support portion 230 can prevent unwanted leakage of the outside air or the filtered air, and the corrugated filter member 100 expands, thereby increasing the effective area of the filter.

Hereinafter, the present invention will be described in more detail with reference to examples. The following examples are intended to further illustrate the present invention, and the scope of the present invention is not limited by the following examples.

Experimental Example  - radius of curvature of filter for respiratory protection

The curvature radius of the filter for respiratory protection with the same size in the plane was changed, and the pressure drop was measured. The results are shown in Table 1 below.

The larger the pressure drop, the lower the filter performance. Referring to the following Table 1, although the increase in the pressure drop is not large at a radius of curvature of about 40 mm or more, the pressure drop is greatly increased at a radius of less than about 40 mm. Accordingly, the respiratory protection filter according to the present invention preferably has a radius of curvature of about 40 mm or more.

Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Radius of curvature
(mm) 38 40.7 44.5 50.6 60 8 Pressure drop (mmH ₂ O) 16.2 12.7 11.7 10.9 10.3 9.3

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention as defined by the appended claims. Accordingly, the scope of protection of the present invention should be construed to cover not only the following claims, but also their equivalents.

10: Filter for breathing protection
100: corrugated filter element
110: Wrinkle tip
120: 1st valley pattern
200: Flexible frame
210:
220: first support portion
221:
222:
223: 2nd valley pattern
230: second support portion

Claims (7)

As a filter for a breathing guard,
A corrugated filter element having a plurality of corrugation tips and a first valley pattern formed between the corrugation tips;
And a first support portion and a second support portion coupled to an edge of the pleated filter member and protruding from the connection portion and the connection portion,
/ RTI >
Wherein the first support portion includes a plurality of protrusions projecting from the flexure support portion and the flexure support portion and respectively engaged with the pleat tips,
And both ends of the pleated filter member are engaged with the second support portion. The method according to claim 1,
A second valley pattern is formed between the plurality of protrusions,
Wherein the depth of the first valley pattern is greater than the depth of the second valley pattern. The method according to claim 1,
And the height of the second support portion is equal to the sum of the height of the bending support portion and the protrusion of the first support portion. The method according to claim 1,
Wherein the ratio of the height of the flexural support to the height of the projection is from 1: 1 to 1: 2. The method according to claim 1,
Wherein the flexible frame comprises a thermoplastic elastomer (TPE). The method according to claim 1,
Wherein the flexible frame has a Shore A hardness of 35 to 45. The filter of claim 1, The method according to claim 1,
Wherein the filter for the respiratory protection has a radius of curvature of at least 40 mm.

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