CN112057760A

CN112057760A - Respiratory filter and method of making same

Info

Publication number: CN112057760A
Application number: CN202011054699.1A
Authority: CN
Inventors: 刘永录; 刘学聪
Original assignee: Xinji Jiatai Protective Equipment Co ltd
Current assignee: Xinji Jiatai Protective Equipment Co ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2020-12-11

Abstract

The invention provides a respiratory filter and a manufacturing method thereof, belonging to the field of air filtering equipment and comprising a filtering bracket, a filtering sheet and a sealing cover; the filtering bracket is provided with a gas circulation opening; the filter sheet covers the front side of the gas circulation opening, and the edge of the filter sheet is sealed, fused and fixed with the filter bracket; the sealed cowling is connected in filtering the support, and extends to filtering the rear side of support, and the sealed cowling forms the breathing cavity with the circulation of gas opening intercommunication, and the sealed cowling is used for the sealed cowling to locate human face. The respiratory filter and the manufacturing method thereof provided by the invention have the advantages that the respiratory filter is simple and light in structure, convenient to wear and good in sealing performance, can effectively protect a user, and can be used for infectious wards or industrial toxic particle environments.

Description

Respiratory filter and method of making same

Technical Field

The invention belongs to the technical field of air filtering equipment, and particularly relates to a breathing filter and a manufacturing method thereof.

Background

At present, the head-mounted respiratory filtration equipment capable of preventing particles mainly comprises two major types, namely a respiratory filtration mask and a mask. The breathing filtering mask has good sealing performance, but has a complex and heavy structure, and is inconvenient to wear; the mask is poor in tightness, facial muscle movement easily causes mask displacement, and then respiratory tracts are directly exposed in the air, and the protective effect is lost.

Disclosure of Invention

The invention aims to provide a respiratory filter and a manufacturing method thereof, and aims to solve the technical problem that a head-mounted respiratory filter device which is compatible with sealing performance and structural portability is lacked in the prior art.

In order to achieve the purpose, the invention adopts the technical scheme that: there is provided a respiratory filter comprising:

the filtering bracket is provided with a gas circulation opening;

the filtering sheet covers the front side of the gas circulation opening, and the edge of the filtering sheet is sealed, fused and fixed with the filtering bracket; and

the sealed cowling, connect in filter support, and to filter support's rear side extends, the sealed cowling form with the breathing cavity of gas circulation opening intercommunication, just the sealed cowling is used for the sealed cowling to locate human face.

As another embodiment of the present application, a closed-loop sealing connection platform is disposed on a front side of an outer periphery of the gas flow opening, and the filter sheet is fixed to the closed-loop sealing connection platform in a sealing and fitting manner.

As another embodiment of the present application, the filter support is a curved support, and the sealing connection surface of the closed-loop sealing connection platform is a curved surface.

As another embodiment of the present application, the filter sheet is formed by stacking or compounding one or more filter material layers.

As another embodiment of the present application, the filter holder is detachably coupled to the sealing cap.

As another embodiment of the application, goggles are also detachably connected to the filtering bracket.

As another embodiment of the application, the rear side edge of the goggles is provided with an elastic sealing ring for fitting with the human face.

As another embodiment of this application, respiratory filter still includes one-way discharge valve, one-way discharge valve locates filter holder just is located outside the filter sheet, one-way discharge valve with respiratory cavity intercommunication.

As another embodiment of the present application, the one-way exhaust valve is located outside the filter sheet.

As another embodiment of the present application, the filter sheet is in a folded zigzag shape.

The breathing filter provided by the invention has the beneficial effects that: compared with the prior art, the filter support of the breathing filter can be a simple and light component, so that the filter part has a simple and light structure and is convenient to wear; the use of cooperation sealed cowling again enables breathing filter inseparable laminating in human face, can not lead to the sealed cowling displacement to reveal because of the muscle motion, guarantees with the leakproofness of human face laminating position, moreover, because filter sheet and filter support are sealed to be fused fixedly, can make filter support's structure furthest's simplification, and filter sheet hookup location's leakproofness also can obtain guaranteeing. The breathing filter has the advantages of simple and light structure, convenience in wearing, good sealing performance and capability of effectively protecting a user.

The invention also provides a manufacturing method of the breathing filter, which is used for manufacturing the breathing filter and comprises the following steps:

forming a fused edge on the periphery of the filter sheet;

cutting the filter sheet with the fused edge into a specified shape;

and welding and fixing the edge of the filter sheet on a filter support to realize the sealing, fitting and fixing of the filter sheet and the filter support.

The manufacturing method of the breathing filter has the advantages that: the edges of the filter sheets are welded after forming the fused edges, so that the connection is firm, the sealing effect is good, the process is environment-friendly, non-toxic and pollution-free, and the large-scale production is facilitated.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is an exploded view of a breather filter according to an embodiment of the present invention;

FIG. 2 is an exploded view of a filter support, a seal cap and goggles employed in accordance with an embodiment of the present invention;

FIG. 3 is an exploded view of a second filter mount, a seal cap and goggles employed in accordance with a first embodiment of the present invention;

FIG. 4 is an exploded schematic view of a cross-sectional structure of a respiratory filter according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view of eyewear and an elastomeric sealing ring employed in a second embodiment of the present invention;

fig. 6(a) is a schematic structural view of a filter sheet used in a third embodiment of the present invention, and (b) is a schematic structural view of a filter sheet used in a fourth embodiment of the present invention.

In the figure: 1. a filtration rack; 2. filtering the sheet material; 3. a sealing cover; 4. a gas flow opening; 5. the closed-loop sealing connection platform; 6. an annular slot; 7. a plug-in ring; 8. goggles; 9. inserting the salient points; 10. inserting holes; 11. an elastic sealing ring; 12. a one-way exhaust valve; 13. a support frame.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In this application, the term "rear" refers to the direction of gas flow during inhalation, and vice versa "front".

Referring to fig. 1 to 4 together, the respiratory filter of the present invention will now be described. The respiratory filter comprises a filter bracket 1, a filter sheet 2 and a sealing cover 3; the filtering bracket 1 is provided with a gas circulation opening 4; the filter sheet 2 covers the front side of the gas circulation opening 4, and the edge of the filter sheet is sealed, fused and fixed with the filter bracket 1; sealing cover 3 is connected in filtering support 1, and extends to filtering support 1's rear side, and sealing cover 3 forms the breathing cavity with 4 intercommunications of gas flow opening, and sealing cover 3 is used for the sealing cover to locate human face.

Wherein, the oral cavity nose of human face is in the breathing chamber, and then can inhale the air from the breathing chamber to exhale the air to breathing intracavity. The sealing cover 3 can be sleeved on the head and face of a human body through an additional elastic band and other structures, so that the breathing filter can be worn.

Compared with the prior art, the filter support 1 of the breathing filter can be a simple and light component, so that the structure of the filter part is simple and light, and the breathing filter is convenient to wear; the use of cooperation sealed cowling again enables breathing filter inseparable laminating in human face, can not lead to the sealed cowling displacement to reveal because of the muscle motion, guarantees with the leakproofness of human face laminating position, moreover, because filter sheet and filter support seal fusion are fixed, filter sheet hookup location's leakproofness also can obtain guaranteeing. The breathing filter has simple and light structure, convenient wearing and good sealing performance, can effectively protect a user, and can be used for infectious sickrooms or industrial toxic particle environments.

In addition, the breathing filter of this application can also be disposable, uses direct the change after a period, guarantees the reliability of protection.

Optionally, filter holder 1 is sheet structure, and the optional plastics material preparation of using, its simple structure is light, is convenient for laminate in human facial design, is favorable to improving convenience and the comfort level of wearing.

As a specific implementation manner of the embodiment of the present invention, the sealing cover 3 is an elastic member, such as a silicone rubber, a thermoplastic elastomer, etc., which is made of a relatively soft and elastic material, so as to be easily attached to the face of the human body, and at the same time, can generate a large friction force with the face of the human body, so that air leakage is not easily generated after wearing.

Referring to fig. 4, a closed-loop sealing connection platform 5 is disposed on the front side of the periphery of the gas flow opening 4, and the filter sheet 2 is fixed to the closed-loop sealing connection platform 5 in a sealing manner. The closed-loop sealing connecting platform 5 raises the distance between the edge connecting position of the filter sheet 2 and the surface of the gas circulation opening 4, so that the filter sheet 2 is conveniently connected with the filter support 1.

Wherein, the front side surface or the inner ring surface of the annular sealing connection platform can be used as a connection surface connected with the edge of the filter sheet material 2.

Referring to fig. 1, a filter support 1 is a curved support, and a sealing connection surface of a closed-loop sealing connection platform 5 is a curved surface. The filtering bracket 1 is arranged to be curved, so that the sealing connection surface of the closed-loop sealing connection platform 5 is curved, the area of the sealing connection surface covering the human face is greatly increased, and the air inflow is increased.

As a specific implementation manner of the embodiment of the present invention, the filter sheet 2 is formed by one filter material layer, or by stacking or compounding multiple filter material layers, and the filter material layer may be pp material, pet alloy material. The filter material layer can also be melt-blown filter paper, the melt-blown filter paper is thin and easy to melt, and needs to form a filter sheet together with other materials, including pp filter paper, filter cotton and other materials in a multi-layer planar combination, or the core filter layer is folded to reduce resistance. The filtering material layer can also be a microporous filtering membrane made of a cleanable PTFE material, so that the breathing filter capable of being cleaned for multiple times is formed.

Referring to fig. 1, a filter sheet 2 is a stretched sheet, as a specific embodiment of an embodiment of the present invention.

Referring to fig. 6, as a specific embodiment of the present invention, the filter sheet 2 is in a zigzag shape folded. The filter sheet 2 may be formed by folding a single-layer sheet or a plurality of stacked sheets, and the formed serrations may be vertical serrations having a high fold height (as shown in fig. 6 (a)), or may be oblique serrations having a high fold height, an intermittent fold height (as shown in fig. 6 (b)). Increasing the height of the filter sheet 5 can further increase the filter area of the filter sheet.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 4, the filter holder 1 is detachably connected to the sealing cover 3. The filtering unit formed by the filtering bracket 1 and the filtering sheet 2 forms a disposable filtering unit, after the disposable filtering unit is used for a period of time, the disposable filtering unit is detached from the sealing cover 3, and a new filtering unit is replaced, so that the filtering reliability of the filtering sheet 2 is ensured, and the protection effectiveness is ensured.

As a specific implementation manner of the embodiment of the present invention, referring to fig. 1 to 4, an annular slot 6 opened backward is disposed at the rear side of the filter support 1, and an insertion ring 7 extending forward and inserted into the annular slot 6 is disposed on the sealing cover 3. The plug-in connection structure is stable, and the sealing effect of the connection position is good.

As a specific implementation manner of the embodiment of the present invention, not shown in the figure, a clamping ring groove opened perpendicular to the front-back direction is provided at the rear side of the filter support 1, and a clamping ring clamped with the clamping ring groove is provided on the sealing cover 3. The clamping connection mode is simple, workers can manually carry out rapid assembly, and the production efficiency is improved.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 3 and fig. 5, the filter bracket 1 is further connected with a goggles 8. The goggles can be selected to be made of PC materials, and then the goggles 8 and the sealing cover 3 can be sterilized through a proper mode and can be used repeatedly. Goggles 18 is the important protection instrument of some special operation scenes, can prevent that harmful substance from spurting and get into people's eye, through setting up goggles 18, has expanded this application respiratory filter's function, makes its applied scene more extensive.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 3 and 5, the goggles 8 and the filter bracket 1 are detachably connected by a connector, and a user can selectively install or not install the goggles 8 according to the requirement, so as to enhance the flexibility of use.

As a specific implementation manner of the embodiment of the present invention, referring to fig. 1 to 3 and fig. 5, the connector includes a plurality of insertion bumps 9, and the goggles 8 are provided with insertion holes 10 matching with the insertion bumps 9. The goggles 8 are connected with the filtering bracket 1 in an inserting mode, and the structure is simple and the assembly and disassembly are convenient.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 5, an elastic sealing ring 11 for being attached to the face of the human body is disposed at the rear side edge of the goggles 8, and the elastic sealing ring 11 may be made of a silicone material, so that the comfort level of the contact with the skin is good, the attachment is good, an effective sealing effect can be achieved, and harmful substances can be prevented from invading the eyes of the human body.

Referring to fig. 4, as a specific implementation manner of the embodiment of the present invention, the respiratory filter further includes a one-way exhaust valve 12, the one-way exhaust valve 12 is disposed on the filtering bracket 1 and outside the filtering sheet 2, and the one-way exhaust valve 12 is communicated with the respiratory cavity. The one-way exhaust valve 12 is used for exhausting the gas exhaled by the human body from the breathing cavity. Specifically, the plastic filtering support 1 is provided with an exhaust hole and a hair piece fixing structure, and a silica gel valve plate is added during assembly, wherein the position of the silica gel valve plate is in the expiration phase and outside the closed-loop type sealing connecting platform 5.

As a specific embodiment of the present invention, the one-way exhaust valve 12 may also be disposed in the area of the filter sheet 2, i.e. the one-way exhaust valve 12 is disposed through the filter holder 1 and the filter sheet 2.

As a specific implementation manner of the embodiment of the present invention, referring to fig. 1 to 4, the gas flow opening 4 is further provided with a support frame 13, and the support frame 13 is used for preventing the filter sheet 2 corresponding to the gas flow opening 4 from deforming, and preventing the filter sheet 2 from entering the gas flow opening 4 during the air suction process. If the filter support 1 is curved, the support frame 13 may be a curved support.

As an embodiment of the present invention, referring to fig. 1 to 4, the supporting frame 13 is a strip-shaped member, and is cross-arm-connected to the gas flow opening 4.

The invention also provides a manufacturing method of the breathing filter. The manufacturing method of the breathing filter is used for manufacturing the breathing filter and comprises the following steps:

forming a fused edge on the periphery of the filter sheet 2;

cutting the filter sheet 2 with the fused edge into a specified shape;

and the edge of the filter sheet 2 is welded and fixed on the filter support 1 so as to realize the sealing, fitting and fixing of the filter sheet 2 and the filter support 1.

The filter sheet 2 is directly worn and exposed after being connected with the filter bracket 1, so that the welding effect is required to bear certain external force interference without influencing the sealing effect, and certain mechanical property is required; in the prior art, only welding points are used for connecting filter paper and plastic, the filter paper is coarse filter paper and is limited between plane filter paper and plane plastic, and only activated carbon particles can be blocked, and the existing welding technology between the filter paper and the plastic is difficult to meet the requirements of sealing performance and mechanical performance of direct exposed use.

According to the manufacturing method of the breathing filter, the edges of the filter sheets 2 are welded after forming the fused edges, the connection is firm, the sealing effect is good, the process is environment-friendly, non-toxic and pollution-free, and the large-scale production is facilitated.

Specifically, the means for forming the bead on the outer periphery of the filter sheet 2 may be ultrasonic welding or thermal welding, and the means for welding and fixing the bead on the outer periphery of the filter sheet 2 to the filter holder 1 may be ultrasonic welding or thermal welding.

If the filter sheet 2 is in a zigzag shape, after the planar filter sheet material is folded, a fused edge is formed on the outer periphery of the filter sheet 2 to fix the shape of the filter sheet 2, and then the filter sheet is cut.

In the application, on the premise that the filter support 1 is a curved support, curved surface welding needs to be performed, and the welding head is used for welding the filter support 1 and the filter sheet 2, and is preferably an ultrasonic welding head.

The optimal selection of the welding surface of the filtering sheet 2 and the filtering bracket 1 is a curved surface adaptive to the shape of the face, the energy received by different fall parts of the ultrasonic welding head is different, the ultrasonic energy of the welding part of the workpiece needs to be uniformly dispersed due to the dispersion and the difference of welding points, some welding heads need to be hollowed out, and the parameters such as the fall, the edge position and the like need to be modified for many times to adapt to the requirement of ultrasonic welding.

In addition, as the welding surface of the workpiece is a curved surface, the filter paper (the filter sheet 2) is a plane and has certain toughness, when the plane filter paper is welded on the curved plastic workpiece (the filter bracket 1), actions such as bending, spreading and welding of the filter paper need to be completed, a small amount of displacement can form hollowing at corners to cause welding failure, the stability of completing the actions needs to be fully considered in the design of the workpiece and the welding head, and the process can be confirmed through multiple times of experimental verification.

Problems also arise during folding and welding of the filter paper: experiments prove that the filter paper made of the melt-blown PP material and ABS plastic are poor in ultrasonic welding effect, other auxiliary materials with good compatibility are compounded, the process is completed by adopting more than three materials in the process, and the KN95 melt-blown filter paper and the closed-loop sealing connection platform are welded.

Finally, the movable connection goggles 8 are designed on the existing particle-proof filter, the movable connection between the lenses and the filter support is required, the connection is firm, the disassembly and the assembly are convenient, the parameters such as the shapes of the lenses, the position relation between the lenses and the breathing cavity, the shape and position selection of the connecting structure and the auxiliary structure, the quantity, the mutual distance and the like all need to be subjected to multiple times of 3D printing actual investigation, the fixed effect and the disassembly and assembly hand feeling are more detailed, transparent lenses need to be printed, and the deformation of the object to be viewed caused by the radian design of the adaptive support is prevented.

The application provides a satisfy the gas defense and prevent the particle function, wear comfortable, pleasing to the eye, be difficult for taking place gas leakage, accord with breathing in resistance, expiration resistance etc. requirement among the relevant standard of country respiratory filter, its research and development process need do a large amount of experiments and accomplish.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A respiratory filter, comprising:

the filtering bracket is provided with a gas circulation opening;

2. The respiratory filter of claim 1, wherein the gas flow opening is peripherally provided on a front side with a closed-loop sealing attachment platform, and wherein the filter sheet is sealingly secured in sealing engagement with the closed-loop sealing attachment platform.

3. The respiratory filter of claim 2, wherein the filter support is a curved support and the sealing interface of the closed-loop sealing interface platform is curved.

4. The respiratory filter of claim 3, wherein the filter sheet is laminated or compounded with one or more layers of filter material.

5. The respiratory filter of claim 1, wherein the filter support is removably attached to the seal cap.

6. The respiratory filter of claim 1, wherein a visor is also removably attached to the filter support.

7. The respiratory filter of claim 6 wherein the rear side edge of the visor is provided with an elastomeric sealing ring for engaging the human face.

8. The respiratory filter of claim 1, further comprising a one-way exhaust valve disposed on the filter support and outside the filter sheet, the one-way exhaust valve in communication with the respiratory cavity.

9. The respiratory filter of claim 1, wherein the filter sheet is pleated.

10. Method for manufacturing a breathing filter, characterised in that it is used for manufacturing a breathing filter according to any of claims 1-9, comprising the steps of:

forming a fused edge on the periphery of the filter sheet;

cutting the filter sheet with the fused edge into a specified shape;