Dust-toxin integrated early warning mask and manufacturing method thereof

Abstract

This invention relates to the field of respiratory protective equipment technology, and more particularly to a dust and toxic gas integrated early warning mask and its manufacturing method. The technical solution includes: a mask body with a primary filter box and a secondary filter box. A secondary filter compartment is connected and installed at the end of the mask body away from the mouth and nose. A primary filter compartment is connected and installed at the side of the secondary filter compartment away from the mask body. An end cap grille is installed at the side of the primary filter compartment away from the secondary filter compartment. An adaptive component is slidably assembled inside the secondary filter compartment. The adaptive component can slide back and forth along the secondary filter compartment according to the negative breathing pressure. The adaptive component is provided with a one-way valve and a protrusion. The protrusion can slide with the adaptive component and squeeze the secondary filter box. A sensor assembly is installed inside the mask body. This invention achieves the effect of adapting to the dynamic breathing intensity of the human body.

Description

Technical Field

[0001] This invention relates to the field of respiratory protective equipment technology, specifically to an integrated dust and toxic gas warning mask and its manufacturing method. Background Technology

[0002] Dust and toxic gas integrated early warning masks are mainly used in industrial work scenarios involving dust, toxic and harmful gases, such as mining, chemical production, and interior decoration. These masks are key equipment for occupational health protection in industry, effectively blocking solid particulate matter and gaseous pollutants in the atmosphere, reducing the probability of occupational diseases caused by workers inhaling harmful substances, and playing a significant role in ensuring the personal safety of industrial workers and standardizing industrial safety operation standards.

[0003] Currently, most industrial respirators use fixed-pore filter media, relying on the pre-set pores of the filter media to physically intercept dust and on a fixed adsorption medium to purify toxic gases. This type of protective structure has fixed filtration accuracy and airflow resistance, making it unable to adapt to the dynamic changes in human breathing intensity. Furthermore, under high-intensity breathing conditions, the effective filtration area of ​​the filter media is insufficient, and the pore penetration rate increases, resulting in a significant decrease in dust and toxic gas filtration efficiency. This makes it difficult to guarantee overall protective stability under complex working conditions. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated dust and toxic substance warning mask and its manufacturing method, which has the advantages of adaptive dynamic filtration and real-time dust and toxic substance warning, and effectively solves the problems of existing protective masks with fixed filtration parameters, inability to adapt to dynamic breathing conditions, and poor protective stability.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a dust and toxic substance integrated early warning mask and its manufacturing method, comprising a mask body, a primary filter chamber, a secondary filter chamber, an end cap grille, a primary filter box, and a secondary filter box. The secondary filter chamber is connected to one end of the mask body away from the mouth and nose. The primary filter chamber is connected to the side of the secondary filter chamber away from the mask body. An end cap grille is installed on the side of the primary filter chamber away from the secondary filter chamber. An adaptive component is slidably assembled inside the secondary filter chamber. The adaptive component can slide back and forth along the secondary filter chamber according to the negative breathing pressure. The adaptive component is provided with a one-way valve and a protrusion. The protrusion can slide with the adaptive component and squeeze the secondary filter box. A sensor assembly is installed inside the mask body.

[0006] Preferably, a guide rod is fixed to the side of the end cap grille facing the primary filter chamber, and a tension spring is connected to the end of the guide rod. The end of the tension spring away from the guide rod is fixedly connected to the slide plate.

[0007] When the above technical solution is adopted, the tension spring and the guide rod cooperate with each other to provide a reset force for the slide plate, ensuring that the adaptive component returns to the initial position in time after the breathing negative pressure disappears, and maintaining the equipment's cyclic working state.

[0008] Preferably, the inner wall of the secondary filter chamber is integrally formed with a guide ridge, and the slide plate and the guide ridge form a sliding fit.

[0009] When the above technical solution is adopted, the guide ridge plays a guiding and limiting role on the slide plate, so that the slide plate can only slide in a straight line along the predetermined trajectory, avoiding deviation and jamming during the sliding process, and ensuring the stability of the adaptive component operation.

[0010] Preferably, holes are provided at the four corners of the mask body, the secondary filter chamber, the primary filter chamber, and the end cap grille, and mounting bolts are inserted into the holes.

[0011] When the above technical solution is adopted, the mounting bolts lock each compartment and the end cover grid into an integral structure, which is firmly assembled and easy to disassemble and assemble. This not only ensures the overall sealing performance, but also facilitates the later inspection and replacement of internal components.

[0012] Preferably, a first grid is fixed inside the secondary filter compartment, a second grid is fixed inside the mask body, and the sensor assembly is arranged inside the mask body between the first grid and the second grid.

[0013] When the above technical solution is adopted, the first and second grilles regulate and guide the airflow, while providing a stable installation space for the sensor components, so that the sensor components are in the airflow path, ensuring that the gas detection data is accurate and effective.

[0014] Preferably, the sensor assembly includes a sensor mounting compartment and a warning horn, the warning horn being fixed to the bottom of the sensor mounting compartment and disposed through the bottom side wall of the mask body.

[0015] When the above technical solution is adopted, the sensor installation compartment can protect the detection components, and the exposed warning horn can clearly transmit the warning sound. When pollutants exceeding the standard are detected, the user can be alerted to the safety risks in the surrounding environment at the first time.

[0016] Preferably, an exhalation valve is embedded in the bottom of the mask body, and a strap mounting hole is provided on the side wall of the mask body.

[0017] When the above technical solution is adopted, the exhalation valve can quickly expel the exhaled air, reducing the stuffiness caused by the accumulation of airflow inside the mask; the strap mounting hole is used to install the wearing strap, so as to achieve stable wearing of the mask and adapt to different usage scenarios.

[0018] Preferably, the end of the mask body facing the mouth and nose is an open structure, the strap mounting hole is sealed, and a sealing ring is embedded in the open end of the mask body.

[0019] When the above technical solution is adopted, the sealing ring can fit the contour of the human face, seal the gap between the mask and the face, and prevent unfiltered air from being directly inhaled; the sealing treatment of the strap installation hole can prevent dust and moisture from entering the equipment through the assembly gap, and extend the service life of the parts.

[0020] Preferably, the primary filter box is located inside the primary filter chamber, the secondary filter box is located inside the secondary filter chamber, and both the primary and secondary filter boxes have ventilation micropores on their surface.

[0021] When the above technical solution is adopted, the limiting structure can prevent the filter box from shifting under the impact of airflow, and the ventilation micropores ensure the normal passage of airflow. Together with the packing material inside the box, it completes the dual filtration of dust and toxic gases, and realizes the basic protection function.

[0022] The manufacturing method of the integrated dust and toxic gas warning mask includes steps such as shell processing, component pre-assembly, filler filling, chamber assembly, overall locking and testing. After each component is processed and assembled in sequence, air tightness, moving parts and function are tested to finally obtain the finished mask.

[0023] When the above technical solution is adopted, the step-by-step manufacturing process is clear and the assembly sequence of each component is reasonable, which can ensure the assembly accuracy of each structure; multiple inspection links can eliminate defective products, ensuring that the structural stability, filtration performance and early warning function of the finished mask can meet the standards and meet the long-term use needs in industrial operating environments.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention achieves adaptation to the dynamic breathing intensity of the human body by incorporating an adaptive component. This adaptive component slides back and forth with the negative breathing pressure, and its equipped sliding plate moves the protrusions, acting on the secondary filter box. This structural movement adjusts the flow porosity of the filter medium, overcoming the problem of fixed pore parameters in traditional filter media. A one-way valve on the sliding plate ensures normal airflow. Under high-load breathing conditions, the changed flow porosity reduces airflow penetration, preventing a decrease in dust and toxic substance filtration efficiency. Working in conjunction with the primary filter box, it effectively enhances protective stability under complex operating conditions. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure from one perspective of the present invention; Figure 2 This is a schematic diagram of the structure from another perspective of the present invention; Figure 3This is a frontal cross-sectional view of the present invention. Figure 4 This is a schematic diagram of the adaptive component split connection structure of the present invention; Figure 5 This is a schematic diagram of the disassembled structure of the present invention; Figure 6 This is a schematic diagram of the sensor assembly structure of the present invention.

[0026] In the diagram: 1. End cap grille; 11. Guide rod; 12. Tension spring; 13. Mounting bolt; 2. Primary filter chamber; 3. Secondary filter chamber; 31. Guide rib; 32. First grille; 4. Mask body; 41. Second grille; 42. Strap mounting hole; 43. Sealing ring; 5. Sensor assembly; 51. Sensor mounting compartment; 52. Warning horn; 6. Exhalation valve; 7. Primary filter box; 8. Adaptive assembly; 81. Slide plate; 82. Through hole; 83. One-way valve body; 84. Protrusion; 9. Secondary filter box. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example 1 like Figures 1 to 6 As shown, one embodiment of the present invention provides a dust and toxic gas integrated early warning mask, including a mask body 4. One end of the mask body 4 is an open structure that can fit and cover the mouth and nose of the human body. A connecting groove is provided at the end of the mask body 4 away from the open, and a secondary filter chamber 3 is connected and installed in the connecting groove.

[0029] A primary filter chamber 2 is connected to the side of the secondary filter chamber 3 furthest from the mask body 4. An end cap grille 1 is detachably installed on the side of the primary filter chamber 2 furthest from the secondary filter chamber 3. Threaded screw holes are machined at the four corners of the end of the mask body 4 near the secondary filter chamber 3. Through holes are correspondingly opened at the four corners of the end cap grille 1, the primary filter chamber 2, and the secondary filter chamber 3. Mounting bolts 13 can pass through these through holes and be screwed into the threaded screw holes to lock and fix the components. After removing the mounting bolts 13, the end cap grille 1, the primary filter chamber 2, and the secondary filter chamber 3 can be disassembled. In the disassembled state, the charging interface of the sensor mounting chamber 51 is exposed, allowing for charging of the sensor mounting chamber 51.

[0030] The end cap grille 1 faces the inner end face of the primary filter chamber 2, and guide rods 11 are vertically heat-fused and fixed in a rectangular array. Each guide rod 11 is connected to a tension spring 12 at its end. The primary filter chamber 2 contains a primary filter box 7, which is confined within the cavity and positioned by the overall assembly structure. The surface of the primary filter box 7 has micropores for gas flow, and its interior is filled with composite filter media.

[0031] The inner wall of the secondary filter chamber 3 is integrally provided with a guide rib 31. The extension direction of the guide rib 31 is parallel to the axis of the mounting bolt 13. The guide rib 31 is used to limit the sliding stroke of the component. The inner end face of the secondary filter chamber 3 opposite to the primary filter chamber 2 is fixedly installed with a first grille 32. The secondary filter box 9 is placed in the cavity on one side of the first grille 32. The secondary filter box 9 is also located inside the secondary filter chamber 3. The box body has ventilation micropores and is filled with the same composite filter material as the primary filter box 7. The secondary filter box 9 is made entirely of elastic silicone material.

[0032] An adaptive component 8 is slidably mounted inside the inner cavity of the secondary filter chamber 3, and the adaptive component 8 forms a sliding fit with the guide rib 31. The adaptive component 8 includes a slide plate 81, and the end of the tension spring 12 facing away from the guide rod 11 is fixedly connected to the slide plate 81. The slide plate 81 has several through holes 82 arranged in a rectangular array on its surface. Each through hole 82 has a one-way valve body 83 embedded and fixed inside. The one-way valve body 83 is a rubber duckbill valve structure, and the opening pressure is set to 50-80 Pa. A mounting hole is opened at the center of the slide plate 81, and a protrusion 84 is embedded and fixed inside the hole. The protruding end of the protrusion 84 is arranged facing the secondary filter box 9.

[0033] A second grille 41 is fixedly installed on the inner end face of the mask body 4 near the secondary filter compartment 3. A sensor assembly 5 is fixedly installed in the area opposite the first grille 32 and the second grille 41. The sensor assembly 5 consists of a sensor mounting compartment 51 and a warning horn 52. The warning horn 52 is fixed to the bottom of the sensor mounting compartment 51 and penetrates the bottom side wall of the mask body 4 and is fixed thereto.

[0034] The bottom side wall of the mask body 4 also has an installation hole, in which an exhalation valve 6 is embedded and fixed. The side wall of the mask body 4 has a strap installation hole 42, and the position of the strap installation hole 42 is sealed. The open end of the mask body 4 has an annular groove, in which a sealing ring 43 is embedded and installed.

[0035] Example 2 like Figures 3 to 5 As shown in the figure, this embodiment further illustrates the operating principle, filtration mechanism and early warning mechanism of the integrated dust and toxic gas warning mask.

[0036] The mask relies on the air pressure changes generated by human respiration to drive the operation of its moving parts. The initial position of the slide plate 81 is the stationary position when the tension spring 12 is in the pre-tensioned state. When the human body inhales normally and slowly, the negative pressure generated by inhalation reaches the opening pressure of the one-way valve 83, which can drive the one-way valve 83 to open, allowing airflow to pass through normally. At this time, the negative pressure value is small and cannot overcome the pre-tension force of the tension spring 12, so the slide plate 81 remains stationary. There is a gap between the protrusion 84 and the secondary filter box 9, so no squeezing effect will occur.

[0037] External airflow enters the primary filter chamber 2 through the end cap grille 1, passes through the micropores of the primary filter box 7 and the internal composite filter packing, completing primary filtration. The airflow after primary filtration flows into the secondary filter chamber 3 through the open one-way valve 83, and then passes through the secondary filter box 9 to complete secondary filtration. In this state, the secondary filter box 9 is not subjected to external pressure, the elastic silicone shell maintains its natural shape, the internal composite filter packing remains loose, the flow gaps between particles and fibers are large, and the airflow resistance is low, suitable for normal, gentle breathing. The airflow after secondary filtration passes sequentially through the first grille 32 and the second grille 41, finally entering the mask body 4 for inhalation.

[0038] When a person inhales rapidly and forcefully, the negative pressure of inhalation increases significantly, and the one-way valve 83 remains open under the pressure difference. The increased negative pressure can overcome the preload of the tension spring 12, pulling the slide plate 81 to make an adaptive displacement along the guide ridge 31 towards the secondary filter chamber 3. The displacement changes synchronously with the magnitude of the negative pressure. During the movement of the slide plate 81, the protrusion 84 gradually presses against the secondary filter box 9. The elastic silicone box body deforms under pressure, and the internal composite filter packing is squeezed and stacked, thereby reducing the flow gap between the packing particles and fibers.

[0039] With the flow gap narrowed, the contact area between the airflow and the filter media increases and the residence time is prolonged, thus improving the interception effect of solid dust and the adsorption effect of harmful gases such as carbon monoxide, nitrogen oxides, formaldehyde, and benzene compounds, achieving enhanced filtration. After completing two stages of filtration, the airflow still enters the mask body 4 through the first grille 32 and the second grille 41.

[0040] When a person exhales, the positive pressure generated by the exhaled airflow acts on the rear side of the slide plate 81. Combined with the tension of the tension spring 12, this drives the slide plate 81 to slide back to the end cover grille 1 along the guide ridge 31. The protrusion 84 is released from the pressure on the secondary filter box 9, and the secondary filter box 9 returns to its original state due to its own elasticity, restoring the gaps in the internal filter packing to their initial state. The one-way valve body 83 closes under the action of its own elasticity and the reverse airflow pressure, blocking the backflow of airflow. The exhaled air is finally discharged to the outside through the exhalation valve 6.

[0041] Sensor assembly 5 collects and detects airflow samples inside the mask in real time through sampling holes on the surface of sensor mounting chamber 51. When the concentration of dust or harmful gas detected exceeds the set range, sensor assembly 5 outputs an electrical signal, triggering the warning horn 52 to activate and issue an early warning to alert the user that there is a risk of pollution in the environment.

[0042] Example 3 like Figures 1 to 6 As shown in the figure, this embodiment provides a method for manufacturing an integrated dust and toxic gas warning mask, which specifically includes the following manufacturing steps: Step 1: Shell fabrication. The mask body 4, secondary filter chamber 3, primary filter chamber 2, and end cap grille 1 are fabricated using injection molding. A connecting groove and threaded screw holes are machined at one end of the mask body 4. Mounting holes for the exhalation valve 6 are machined on the bottom sidewall, and strap mounting holes 42 are machined on the sidewall. An annular groove is machined at the open end. A guide rib 31 is integrally formed on the inner sidewall of the secondary filter chamber 3, and the first grille 32 is fixedly installed inside the secondary filter chamber 3. Through holes of uniform specifications are machined at the four corners of the end cap grille 1, the four corners of the primary filter chamber 2, and the four corners of the secondary filter chamber 3. After shell fabrication, the strap mounting holes 42 are sealed.

[0043] Step 2: Component pre-assembly and packing. Select guide rod 11 and fix it vertically to the inner end face of end cap grid 1 facing primary filter chamber 2 via heat fusion. Connect tension spring 12 to the end of guide rod 11. Prepare slide plate 81. Machining through holes 82 in a rectangular array on the surface of slide plate 81. Embedding rubber one-way valve body 83 in each through hole 82. Machining mounting hole at the center of slide plate 81 and embedding protrusion 84 in the hole. Then, fixing the end of tension spring 12 away from guide rod 11 to slide plate 81 to complete the pre-assembly of adaptive component 8.

[0044] Modified activated carbon particles are mixed with ultrafine polypropylene meltblown fibers to form a composite filter packing, which is then filled into the primary filter box 7 and the secondary filter box 9 made of elastic silicone material, respectively, to ensure uniform filling. Then, ventilation micropores are processed on the surface of the two filter boxes.

[0045] Step 3: Internal Assembly of the Chamber. Place the filled primary filter box 7 into the corresponding area inside the primary filter chamber 2 to achieve chamber positioning. Slide the pre-assembled adaptive component 8 onto the guide rib 31 of the secondary filter chamber 3, and then place the filled secondary filter box 9 inside the secondary filter chamber 3, next to the first grid 32. Fix the second grid 41 to the corresponding position inside the mask body 4, and fix the sensor component 5 between the first grid 32 and the second grid 41, ensuring that the warning horn 52 at the bottom of the sensor mounting chamber 51 penetrates through the bottom side wall of the mask body 4 and is fixed. Embed the exhalation valve 6 in the mounting hole at the bottom of the mask body 4, and embed the sealing ring 43 in the annular groove at the open end.

[0046] Step 4: Assemble and fix the entire assembly. Connect the secondary filter compartment 3 to the connecting groove of the mask body 4, then connect the primary filter compartment 2 to the secondary filter compartment 3. Finally, cover the outside of the primary filter compartment 2 with the end cap grille 1. Take the mounting bolt 13 and pass it through the through holes of the end cap grille 1, the primary filter compartment 2, and the secondary filter compartment 3 in sequence. Screw it into the threaded screw hole of the mask body 4 and tighten it to complete the overall locking assembly.

[0047] Step 5: Inspection and Finishing. The assembled mask undergoes airtightness testing, moving part testing, and functional testing. The sliding state of the adaptive component 8 along the guide ridge 31 is checked, and the smooth opening and closing of the one-way valve 83 and exhalation valve 6 is confirmed. The signal transmission and sound emission functions of the sensor component 5 and the warning horn 52 are tested. All splicing positions and sealing structures are checked for air leakage and jamming issues. After all tests are passed, the wearing straps are installed at the strap mounting holes 42 to obtain the finished dust and toxic gas integrated warning mask.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0049] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dust and toxic gas integrated early warning mask, comprising a mask body (4), a primary filter box (7), and a secondary filter box (9), characterized in that: The mask body (4) has a secondary filter chamber (3) connected to one end away from the mouth and nose. The secondary filter chamber (3) has a primary filter chamber (2) connected to one side away from the mask body (4). The primary filter chamber (2) has an end cap grille (1) installed on one side away from the secondary filter chamber (3). A reset elastic element is provided between the end cap grille (1) and the adaptive component (8) for driving the adaptive component (8) to reset during exhalation; An adaptive component (8) is slidably mounted inside the secondary filtration chamber (3), and the adaptive component (8) slides back and forth along the secondary filtration chamber (3) with the negative breathing pressure; The adaptive component (8) includes a slide plate (81), a through hole (82) is provided on the slide plate (81), a one-way valve body (83) is provided in the through hole (82), and a protrusion (84) is fixed on the slide plate (81). The secondary filter box (9) is located on the sliding path of the protrusion (84). The protrusion (84) slides and squeezes the secondary filter box (9) with the slide plate (81). The sensor assembly (5) is installed inside the mask body (4).

2. The dust-toxin integrated early warning mask according to claim 1, characterized in that, The end cap grid (1) is fixed with a guide rod (11) on the side facing the primary filter chamber (2). The end of the guide rod (11) is used to connect a reset elastic element, which is a tension spring (12). The end of the tension spring (12) away from the guide rod (11) is fixedly connected to the slide plate (81).

3. The dust-toxin integrated early warning mask according to claim 2, characterized in that, The inner wall of the secondary filter chamber (3) is integrally formed with a guide rib (31), and the slide plate (81) and the guide rib (31) form a sliding fit.

4. The dust-toxin integrated early warning mask according to claim 1, characterized in that, Holes are provided at the four corners of the mask body (4), secondary filter chamber (3), primary filter chamber (2) and end cap grille (1), and mounting bolts (13) are inserted into the holes.

5. The dust-toxin integrated early warning mask according to claim 1, characterized in that, The secondary filter chamber (3) has a first grid (32) fixed inside, the mask body (4) has a second grid (41) fixed inside, and the sensor assembly (5) is arranged in the mask body (4) between the first grid (32) and the second grid (41).

6. The dust-toxin integrated early warning mask according to claim 5, characterized in that, The sensor assembly (5) includes a sensor mounting compartment (51) and a warning horn (52). The warning horn (52) is fixed to the bottom of the sensor mounting compartment (51) and is installed through the bottom side wall of the mask body (4).

7. The dust-toxin integrated early warning mask according to claim 1, characterized in that, The bottom of the mask body (4) is fitted with an exhalation valve (6), and the side wall of the mask body (4) is provided with a strap installation hole (42).

8. The dust-toxin integrated early warning mask according to claim 7, characterized in that, The mask body (4) has an open structure at the end facing the mouth and nose, the strap mounting hole (42) is sealed, and a sealing ring (43) is embedded at the open end of the mask body (4).

9. The dust-toxin integrated early warning mask according to claim 1, characterized in that, The primary filter box (7) is located inside the primary filter chamber (2), and the secondary filter box (9) is located inside the secondary filter chamber (3). Both the primary filter box (7) and the secondary filter box (9) have ventilation micropores on their surfaces.

10. A method for manufacturing a dust and toxic gas integrated early warning mask, characterized in that, Includes the following steps: Step 1: The mask body (4), secondary filter chamber (3), primary filter chamber (2) and end cap grid (1) are manufactured by injection molding. Holes and guide ridges (31) are machined at the corresponding positions of each component. The strap mounting holes (42) are sealed and the first grid (32) is fixed in the secondary filter chamber (3). Step 2: Fix the guide rod (11) to the inside of the end cap grid (1), connect the tension spring (12) to the guide rod (11) and the slide plate (81) respectively, install the one-way valve body (83) in the through hole (82) of the slide plate (81), fix the protrusion (84) on the slide plate (81) to complete the pre-installation of the adaptive component (8); Step 3: Process ventilation micropores on the surface of the primary filter box (7) and the secondary filter box (9), fill the box with composite filter material, place the primary filter box (7) and the secondary filter box (9) in the corresponding chambers, and assemble the adaptive component (8) with the guide rib (31). Step 4: Fix the second grid (41) inside the mask body (4), install the sensor assembly (5) between the first grid (32) and the second grid (41), and embed the exhalation valve (6) and the sealing ring (43) on the mask body (4). Step 5: Connect and assemble each compartment and end cover grid (1) in sequence, insert the mounting bolts (13) to complete the locking and fixing, and assemble the wearing straps after testing the airtightness, moving parts and functions.

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