Tail quick-opening exhaust valve nozzle structure of pipe-wound valve bottom sheet

Abstract

The invention discloses a pipe-wound valve bottom sheet tail quick-opening exhaust valve nozzle structure which comprises a valve shell, an adjustable exhaust pipe, a left nose annular pipe, a right nose annular pipe, a nozzle exhaust area, a left nose exhaust area, a right nose exhaust area, a page turning type sealing sheet and a nose interval partition plate. A sealing opening of the valve is divided into different functional areas, waste nasal breath is guided to the tail end of a force arm of the page turning type sealing piece in a bypassing mode through the annular pipe, and the valve can be rapidly opened through weak nasal breath air pressure according to the lever principle. And the mouth exhaust area realizes rapid exhaust of waste gas by utilizing high-pressure kinetic energy of an oral cavity. Mutual blow-by of the exhaust areas is prevented through the partition plates between the nasal regions and the Venturi principle. The exhaust sensitivity and thoroughness can be remarkably improved, dead cavities are eliminated through the micro lip attaching layout, the defects that a valve is difficult to open due to waste gas circulation and nostril expiration of an existing mask are overcome, and the mask has the advantages of being compact in structure, friendly in view field, low in cost and high in efficiency.

Description

Technical Field

[0001] This invention relates to the technical field of labor protection products, and in particular to the structure of a tubular valve bottom plate tail-speed opening exhaust valve nozzle. Background Technology

[0002] In the field of occupational safety and health products, masks and face shields, as core respiratory protection equipment, have an extremely large annual social consumption, with an industry output value reaching hundreds of billions of yuan. However, in actual use, due to significant defects in the efficiency of exhaust gas replacement and the supply of fresh air, users are often reluctant to wear them. Existing masks and face shields generally suffer from excessive dead space, which not only causes wearers to feel hypoxic and stuffy, but also causes facial burning due to the inability to dissipate heat in time, and reduces air permeability due to moisture filling the inside of the mask. After prolonged wear, odors easily develop inside the mask, and the positive pressure during exhalation often causes air leakage at the bridge of the nose, leading to inconveniences such as fogging of glasses. Although some technologies have attempted to adjust the position of the exhaust valve to make the sealing opening closer to the lips to utilize the initial airflow velocity, the structural optimization of the exhaust valve itself, especially the technical solutions for balancing the characteristics of mouth and nose breathing, are still not detailed enough.

[0003] Existing exhaust valve structures are mainly divided into two types: disc-shaped and flap-shaped. Disc-shaped valves have their fixed point at the center, requiring airflow to overcome significant deformation resistance to open, resulting in a larger airflow force required for opening. While flap-shaped valves utilize the lever principle, making opening the lower end, farther from the fixed point, easier, their installation orientation is limited, typically requiring vertical installation and relying on their own weight for sealing. In terms of human physiology, the force of nasal exhalation is usually only about one-third that of oral exhalation, and the nostrils are located above the mouth, while the easiest part to open on a flap-shaped valve is located at the bottom. This structural misalignment makes it difficult for the weak airflow from the nostrils to effectively open the valve, causing exhaust gas to circulate and accumulate inside the hood. Furthermore, differences in facial shape also affect the size of the cavity in front of the mouth. If the valve is far from the mouth and nose, the kinetic energy of exhalation will rapidly decrease, further causing problems such as slow valve opening, small opening range, and insufficient exhaust gas discharge.

[0004] Meanwhile, the human body's breathing pattern is characterized by nasal breathing for the vast majority of the time, with the two nostrils alternating in operation. Existing exhaust valves often fail to effectively distribute airflow between the mouth and nose and allow for independent exhaust, resulting in valves failing to open under slight air pressure or air leakage during the switch between oral and nasal breathing. Simply installing multiple valves for the mouth and nose separately would create new problems such as complex structure, large size, and high cost. Therefore, designing an exhaust valve structure that can guide the weak airflow from the nasal cavity to the valve plate at the most effortless position for opening, ensure that exhaust from the mouth and nose does not interfere with each other, and is compact and inexpensive has become a key technical challenge that urgently needs to be solved to improve the protective performance and wearing comfort of masks and face shields. Summary of the Invention

[0005] The purpose of this invention is to provide a tail-speed opening exhaust valve nozzle structure for a wound valve base plate, so as to overcome the shortcomings of the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A spiral wound valve base plate tail-speed opening exhaust valve nozzle structure integrates a valve housing, an adjustable exhaust pipe, a left nose annular pipe, a left nose exhaust area, a valve sealing port, a nose area partition, a right nose exhaust area, a nozzle exhaust area, a flapper-type sealing plate, a sealing plate positioning pin, a right nose annular pipe, a right nose air inlet, and a left nose air inlet. The valve housing serves as the load-bearing base of the entire structure, and the cavity formed inside it accommodates the airflow exchange components. The flapper-type sealing plate is fixed to the upper interior of the valve housing by the sealing plate positioning pin, so that the flapper-type sealing plate is tightly pressed against the valve sealing port under the action of gravity and its own material elastic tension, forming a one-way sealing structure.

[0007] In the layout design of the valve sealing port, this solution breaks through the limitations of the traditional single exhaust channel, dividing the valve sealing port vertically into areas with different functional attributes. Specifically, the upper area near the sealing plate positioning pin is designated as the mouth exhaust area, while the lower area away from the sealing plate positioning pin is further subdivided into the left nasal exhaust area and the right nasal exhaust area. This spatial division method based on the lever principle allows different intensities of exhalation pressure to act on different lever arms of the flap-type sealing plate.

[0008] The structural design of the left and right nasal annular tubes is the core of this solution for achieving valve opening with a slight airflow. The left and right nasal inlets correspond to the wearer's left and right nostrils, respectively. Exhaled nasal air enters the corresponding left and right nasal annular tubes through the left and right nasal inlets. The left and right nasal annular tubes travel along the lateral path of the valve housing, guiding the airflow to the tail of the flapper seal, specifically the end of the flapper seal furthest from the sealing pin. Based on the lever principle in physics, when air pressure is applied to this end, the lever arm reaches its maximum value, and the slight nasal air pressure generates an opening torque sufficient to overcome the weight and deformation resistance of the flapper seal, causing it to quickly displace and open the left or right nasal exhaust area.

[0009] Furthermore, the mouth exhaust area is located on the upper part of the flap-type sealing sheet, near the sealing sheet positioning pin. Although this position is at the short lever end of the lever, and the opening resistance is relatively large, since the instantaneous pressure of human oral exhalation is usually more than three times that of nasal exhalation pressure, when this high-pressure kinetic energy acts directly on the mouth exhaust area, it still has the function of causing the flap-type sealing sheet to flip at a large angle, thereby realizing the rapid discharge of a large flow of exhaust gas.

[0010] The nasal partition is longitudinally positioned between the left and right nasal exhaust zones. The physical barrier provided by the nasal partition, combined with the independent flow channel design of the left and right nasal annular tubes, follows the Venturi principle to create flow field isolation between the different exhaust zones. When one nostril is in the dominant breathing phase, the airflow generated therein forms a local high pressure in the corresponding exhaust zone and is discharged. Due to the presence of the nasal partition, this high-pressure airflow will not flow back into the other nasal or mouth exhaust zone during the resting phase, thus preventing the exhaust gas from shifting and recirculating within the valve body.

[0011] The adjustable exhaust pipe is installed at the exhaust end of the valve housing via a threaded connection or a nested sliding structure. By adjusting the extension length or angle of the adjustable exhaust pipe, a precise match can be achieved between the valve sealing port and the wearer's lips. In practical applications, by shortening this distance to a state that is slightly touching the lips, exhaled air can directly enter the mouth exhaust area without passing through the dead space cavity inside the mask or face shield, thereby eliminating dead space and improving the freshness of breath.

[0012] The left and right nasal air inlets are geometrically funnel-shaped or irregularly shaped to conform to the physiological curve of the nostrils. This structural design reduces edge turbulence and maintains the initial velocity of the airflow when collecting it. The inner walls of the left and right nasal annular tubes are coated with a hydrophobic nano-coating to reduce the viscous resistance caused by the condensation of moisture in the exhaled air, ensuring that the weak airflow maintains sufficient kinetic energy to act on the tail of the flap-type sealing plate during its circulation.

[0013] The flap-type sealing strip is made of medical-grade liquid silicone with a gradient thickness. It is thicker near the base of the positioning pin to provide structural support, and thinner near the tail of the left and right nasal venting areas to improve pressure sensitivity. This optimized combination of material and thickness, along with the lever principle, enables a response to extremely small pressure differences.

[0014] Specifically, the valve sealing port has a recessed air guide cavity on the side surface near the lips. The curved design of the air guide cavity is ergonomic, used to converge the dispersed airflow at the moment of exhalation, guiding the airflow precisely to the center of the mouth exhaust area, thereby reducing exhalation resistance and increasing the opening speed of the flap-type sealing plate.

[0015] Based on the physiological characteristic of alternating operation of the human nostrils, the operation process of this solution is as follows: S1. When the wearer is at rest and breathes through the left nostril, a small amount of exhaust gas enters the left nasal annular tube through the left nasal inlet and travels along the side wall of the valve housing to the lowest end of the flap-type sealing sheet.

[0016] S2. Exhaust gas accumulates in the left nostril exhaust area and forms pressure, acting on the end of the long lever arm to overcome the sealing force of the flap-type sealing plate, causing its lower edge to curl outwards, and the exhaust gas is discharged outside the adjustable exhaust pipe. At this time, the right nostril exhaust area and the mouth exhaust area remain sealed under the action of the nostril area partition and gravity.

[0017] S3. When the breathing phase switches to the right nostril or mouth, the corresponding right nasal exhaust zone or mouth exhaust zone independently performs the opening action, and the channels do not interfere with each other.

[0018] Furthermore, the bypass paths of the left and right nasal annular tubes can be implemented in various ways. In one embodiment, the two sets of annular tubes are symmetrically distributed along the left and right sides of the valve housing to maintain the overall center of gravity balance of the valve body; in another embodiment, the two sets of annular tubes can be integrated from the front or rear side of the valve housing to adapt to the internal space constraints of different mask models. In addition to traditional puncture fixation, the sealing plate positioning pins can be replaced with a snap-fit ​​structure with anti-detachment function to facilitate the periodic disassembly and cleaning of the flap-type sealing plate.

[0019] In implementing the technical solution of this invention, the area ratios of the mouth exhaust zone, the left nasal exhaust zone, and the right nasal exhaust zone are precisely calculated. Typically, the area of ​​the mouth exhaust zone is set to 50% to 60% of the total area to meet the demands of high lung capacity during exercise. The remaining areas of the left and right nasal exhaust zones compensate for insufficient pressure by extending the lever arm. The edge of the valve sealing port is provided with micron-level sealing protrusions to form a line seal with the flap-type sealing sheet in the closed state, reducing the contact area and preventing the valve from failing to open due to saliva adhesion.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: Firstly, it achieves thorough and sensitive exhaust. By creatively guiding the nasal airflow to the lever end of the flap-type sealing plate, the long lever arm effect amplifies the work capacity of weak air pressure, solving the problem in existing technologies where nasal exhalation cannot effectively open the valve. Combined with the micro-lip layout of the adjustable exhaust pipe, the exhaust gas is guided outside the hood the moment it is generated, fundamentally eliminating the oxygen deficiency and stuffiness caused by dead space.

[0021] Secondly, it boasts excellent structural integration and user-friendly visibility. The lateral annular tube design cleverly avoids the main airflow channel at the valve's center, preventing turbulence interference caused by overlapping flow channels while maintaining the valve's overall flat structure. This design avoids complex piping stacked directly in front of the mask, thus not obstructing the wearer's downward view and improving operational safety.

[0022] Thirdly, it closely matches the physiological breathing patterns of the human body. Targeting the alternating nasal breathing characteristic, it employs physical zoning and independent flow channels to ensure that the valve opens with minimal energy consumption regardless of the breathing mode. Simultaneously, the application of the Venturi effect effectively prevents airflow between the mouth and nose, guaranteeing the purity of the respiratory cycle.

[0023] Fourth, it achieves a balance between low cost and high efficiency. Using only a single flap-type sealing disc and a multi-functional partitioned valve seat structure, it achieves the mouth-nose separation exhaust effect that previously required multiple independent valves. Most structural components are injection molded, making assembly simple and highly economical for large-scale industrial production. It can be widely used in various fields such as medical protection, industrial dust control, gas masks, and fire rescue.

[0024] The exhaust valve nozzle structure with tail-speed opening of the coiled valve base plate described in this invention achieves a qualitative leap in exhaust performance through the optimization of the physical structure by deeply integrating fluid mechanics, mechanical lever principles, and human physiological structure, while maintaining structural simplicity and reliability. The valve shell material can be selected from polypropylene, polycarbonate, or high-temperature resistant alloy materials according to the application environment to meet the strength and stability requirements under different working conditions. The exhaust direction of the adjustable exhaust pipe can be rotated and adjusted according to user habits to prevent the discharged hot and humid exhaust gas from directly hitting the chest or neck, further improving wearing comfort.

[0025] In summary, this invention, through the specific coupling of the left and right nasal annular tubes with the tail of the flap-type sealing plate, and in conjunction with the functional zoning of the valve sealing port, forms a complete and feasible micro-pressure exhaust system. This system, without requiring external energy, relies purely on the dynamic characteristics of breathing airflow and a sophisticated mechanical structure design to achieve efficient, immediate, and unidirectional replacement of exhaust gas, providing a concrete technical solution for improving the performance of respiratory protective equipment. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the exhaust valve nozzle structure of the bottom plate of the coiled valve of the present invention. Figure 2 This is the left view of the present invention.

[0027] Figure description: 1—Valve housing, 2—Adjustable exhaust pipe, 3—Left nose annular pipe, 4—Left nose exhaust area, 5—Valve sealing port, 6—Nose area partition, 7—Right nose exhaust area, 8—Mouth exhaust area, 9—Flip-type sealing plate, 10—Sealing plate positioning pin, 11—Right nose annular pipe, 12—Right nose air inlet, 13—Left nose air inlet. Detailed Implementation

[0028] like Figure 1 and Figure 2 As shown in the diagram, the present invention provides a tubular valve base plate tail-speed opening exhaust valve nozzle structure, the main structure of which is built on a valve housing 1. The valve housing 1 is made of medical-grade polypropylene material through high-precision injection molding, and its internal space is designed with fluid dynamics optimization to reduce the friction resistance of airflow. A dedicated fixing seat is provided on the upper part of the interior of the valve housing 1, and the root of the flap-type sealing plate 9 is firmly locked by the sealing plate positioning pin 10. The sealing plate positioning pin 10 has a preset clamping force during installation, ensuring that the flap-type sealing plate 9, in the non-exhalation state, relies on the elastic rebound force of its material and the gravity vector component to tightly fit the edge of the valve sealing port 5, achieving a one-way check valve sealing effect.

[0029] The valve sealing port 5 has a longitudinally extending elliptical or rectangular geometry and is functionally divided into three independent and interconnected exhaust zones. Specifically, the area adjacent to the sealing plate positioning pin 10 is defined as the mouth exhaust zone 8. Since this area is near the rotation fulcrum of the flap-type sealing plate 9, according to the mechanical lever principle, this is the short lever arm end, and the instantaneous pressure peak required to open the seal at this location is relatively high. However, considering the large airflow and high velocity of exhalation in the human mouth, the resulting dynamic pressure is sufficient to overcome the opening resistance of the flap-type sealing plate 9 at this location, achieving instantaneous discharge of a large flow of exhaust gas.

[0030] At the lower part of the valve sealing port 5, i.e., at the end away from the sealing plate positioning pin 10, a longitudinally extending nasal partition 6 divides it into a left nasal exhaust zone 4 and a right nasal exhaust zone 7. The nasal partition 6 not only provides physical support but, more importantly, establishes a pressure barrier between the left nasal exhaust zone 4 and the right nasal exhaust zone 7, preventing disordered turbulence in the airflow between the left and right channels. Since these two exhaust zones are located at the free end of the flap-type sealing plate 9, i.e., the long lever arm end of the lever, according to the torque balance equation, applying a small pressure at this point can generate a large opening torque. This structural feature is specifically designed for the weak physiological characteristics of nasal exhalation pressure, achieving sensitive valve response under extremely low pressure differentials.

[0031] A left nasal annular tube 3 and a right nasal annular tube 11 are integrated symmetrically on the left and right sides of the valve housing 1, respectively. The path design of these two sets of annular tubes avoids the central main channel of the valve housing 1, instead curving around the side wall of the housing. The upstream end of the left nasal annular tube 3 is connected to the left nasal air inlet 13, and the downstream end is precisely pointed to the left nasal exhaust area 4; similarly, the right nasal annular tube 11 is connected to the right nasal air inlet 12 and points to the right nasal exhaust area 7. This bypass structure allows the nasal airflow, which is originally located above, to avoid interference from the oral airflow and be directed to the most easily opened position at the tail of the flap-type sealing plate 9.

[0032] To accommodate different facial anatomy structures, the valve housing 1 is equipped with an adjustable exhaust pipe 2 at its exhaust end. The adjustable exhaust pipe 2 is connected to the valve housing 1 via a multi-segment threaded structure or a telescopic sleeve mechanism with a self-locking function. By rotating or pulling the adjustable exhaust pipe 2, the wearer can precisely change the spatial distance between the valve sealing port 5 and their lips. By reducing this distance to a micro-contact state, exhaled exhaust gas enters the exhaust channel the instant it leaves the mouth and nose, thereby minimizing the dead space volume inside the mask or face shield and significantly increasing the oxygen concentration during inhalation.

[0033] The specific operating principle and dynamic process are as follows: S1. Initial Preparation and Adaptation Stage. After donning the protective gear, the wearer manually adjusts the adjustable exhaust pipe 2, bringing the valve housing 1 closer to the face until the outer edge of the mouth exhaust area 8 of the valve sealing port 5 is slightly close to the lips. Simultaneously, the positions of the left nostril inlet 13 and the right nostril inlet 12 are adjusted so that they are aligned with the left and right nostrils, respectively. At this time, the flap-type sealing plate 9 is in a completely closed state under static pressure, allowing outside air to enter only through the filter layer of the protective gear, and preventing backflow through the adjustable exhaust pipe 2.

[0034] S2. Nasal Resting Breathing Exhaust Phase. When the wearer is in a quiet state and breathing through the nose, assuming the current physiological cycle is dominated by breathing through the left nostril, the weak exhaled waste gas enters the left nasal annular tube 3 through the left nasal inlet 13. The airflow maintains a certain initial velocity within the left nasal annular tube 3 and travels along the inner wall of the valve housing 1 to the bottom of the flap-type sealing plate 9. Since this location is at the longest lever arm, even though the nasal breathing pressure is only one-third of the oral pressure, the pressure formed by the airflow in the left nasal exhaust zone 4 is sufficient to push open the tail edge of the flap-type sealing plate 9. The waste gas is then discharged through the adjustable exhaust pipe 2. During this process, the nasal partition 6 ensures that the right nasal exhaust zone 7 on the right side remains sealed, preventing ineffective circulation of waste gas within the cover.

[0035] S3, Oral Exhalation Stage. When the wearer engages in strenuous physical labor or vigorous exercise and needs to exhale deeply through the mouth, the high-speed airflow directly impacts the mouth exhaust zone 8. Although this position is close to the fulcrum and has high opening resistance, the flap-type sealing sheet 9 is lifted up at a large angle due to the extremely high kinetic energy of oral exhalation. At this time, the mouth exhaust zone 8, the left nostril exhaust zone 4, and the right nostril exhaust zone 7 simultaneously form an exhaust passage, achieving large-capacity, unobstructed emission of exhaust gas.

[0036] S4. Airflow Isolation and Venturi Effect Application Stage. During exhalation, the high-speed airflow passing through the mouth exhalation zone 8 creates localized negative pressure zones near the left nasal exhalation zone 4 and the right nasal exhalation zone 7. According to the Venturi principle, this negative pressure effect generates a suction effect, assisting in the removal of residual air from the left nasal annular tube 3 and the right nasal annular tube 11, further improving exhalation efficiency. When exhalation ends, the flap-type sealing plate 9 quickly resets under the action of elastic force, completing one breathing cycle.

[0037] Regarding the specific material selection, the flap-type sealing sheet 9 uses liquid silicone with a hardness between 20 and 30 Shore A, and its cross-sectional thickness is designed as a non-uniform thickness gradient structure. The thickness at the root near the sealing sheet positioning pin 10 is set to 0.8 mm to 1.2 mm to provide stable structural support; while the thickness at the tail end extending to the left nostril exhaust area 4 and the right nostril exhaust area 7 gradually decreases to 0.3 mm to 0.5 mm. This thickness gradient is perfectly coupled with the lever principle, which improves the sensitivity of the tail end to small air pressure by more than 50%, realizing true tail speed opening.

[0038] The edges of the left nasal air inlet 13 and the right nasal air inlet 12 are machined with ergonomically rounded chamfers and coated with a hydrophilic coating to guide condensate to collect and drain along a preset path, preventing water droplets from sticking to the flap-type sealing plate 9 and increasing opening resistance. The sealing surface of the valve sealing port 5 adopts a micron-level frosted texture design. This non-absolutely smooth surface can effectively break the surface tension generated by saliva and prevent the valve plate from sticking due to moisture.

[0039] For applications in extremely cold environments, the walls of the left nasal annular tube 3 and the right nasal annular tube 11 are thickened to utilize the residual heat of exhaled air for heat conduction to the flap-type sealing plate 9, preventing the valve plate from hardening or freezing and failing at low temperatures. Furthermore, the valve housing 1 has a recessed air guide cavity on the side near the lips. The curvature of this cavity is precisely calculated to collect and converge scattered airflow from both sides of the mouth, directing it towards the center of the mouth exhaust zone 8, thereby improving energy utilization.

[0040] In terms of assembly process, the sealing plate positioning pin 10 can be replaced with a snap-on assembly with quick-release function. This assembly includes a base with elastic claws and a pressure cap, allowing users to remove the flip-type sealing plate 9 for deep cleaning or replacement without tools. This greatly extends the service life of protective equipment for long-term work in dusty and oily environments and ensures hygiene standards.

[0041] The routing paths of the left nasal annular tube 3 and the right nasal annular tube 11 can also be flexibly varied in other embodiments. For example, in the design of lightweight masks, these two sets of tubes can be integrated from the front or rear side of the valve housing 1, reducing the overall thickness through a flattened tube cross-section design. In applications for heavy-duty gas masks, the diameter of the adjustable exhaust pipe 2 can be further increased, and a sound-absorbing grille can be installed inside to reduce the whistling sound generated during high-speed exhaust.

[0042] This solution, through the physical configuration of the left nasal annular tube 3 and the right nasal annular tube 11, guides a weak airflow to the end of the long lever arm, completely solving the problem of slow opening of traditional exhaust valves in nasal breathing mode. The functional partitioning of the mouth exhaust zone 8, the left nasal exhaust zone 4, and the right nasal exhaust zone 7 achieves full compatibility with complex human breathing patterns. This structure, based on the principle of physical leverage and optimized fluid dynamics, achieves extremely high exhaust efficiency and wearing comfort through a purely mechanical structure without adding any electronic active control components.

[0043] In actual manufacturing, the mold for the valve housing 1 employs multi-cavity cold runner technology to ensure that the dimensional tolerances of each component are controlled within ±0.02 mm, thereby guaranteeing the fitting accuracy between the flap-type sealing plate 9 and the valve sealing port 5. A minute gap of 0.1 mm is maintained between the top of the nose section partition 6 and the inner surface of the flap-type sealing plate 9, ensuring both a tight seal during operation and avoiding unnecessary frictional resistance during opening.

[0044] In summary, the tubular valve base plate tail-speed opening exhaust valve nozzle structure described in this invention achieves precise capture and efficient discharge of exhaust gas from the mouth and nose through a sophisticated tubing routing scheme and lever mechanics layout. It not only eliminates the long-standing problems of dead space heat accumulation and poor exhaust in respiratory protective equipment at the technical level, but also achieves a balance between structural compactness and manufacturing economy at the industrial design level. The application of this structure can significantly reduce the wearer's respiratory load and improve work endurance in harsh environments.

Claims

1. A pipe around valve bottom piece tail speed open exhaust valve nozzle structure, characterized in that, The valve includes a valve housing (1), an adjustable exhaust pipe (2), a left nose ring pipe (3), a valve sealing port (5), a right nose ring pipe (11), a flap-type sealing plate (9), and a sealing plate positioning pin (10) for fixing the flap-type sealing plate (9) inside the upper part of the valve housing (1); the upper part of the valve housing (1) is provided with a left nose air inlet (13) and a right nose air inlet (12) respectively; one end of the left nose ring pipe (3) is connected to the left nose air inlet (13). The other end runs along the side wall of the valve housing (1) and points to the lower region of the valve sealing port (5); one end of the right nose ring tube (11) is connected to the right nose air inlet (12), and the other end runs along the other side wall of the valve housing (1) and points to the lower region of the valve sealing port (5); the air outlet ends of the left nose ring tube (3) and the right nose ring tube (11) are both located at the free end of the flap-type sealing plate (9) away from the sealing plate positioning pin (10).

2. The structure of the exhaust valve nozzle with tail speed opening of the wound valve base plate according to claim 1, characterized in that, The valve sealing port (5) is divided vertically into a mouth venting area (8), a left nose venting area (4), and a right nose venting area (7); the mouth venting area (8) is located on the upper part of the valve sealing port (5) near the sealing plate positioning pin (10); the left nose venting area (4) and the right nose venting area (7) are located on the lower part of the valve sealing port (5).

3. The structure of the exhaust valve nozzle with tail speed opening of the wound valve base plate according to claim 2, characterized in that, A longitudinally extending nasal partition (6) is provided between the left nasal exhaust area (4) and the right nasal exhaust area (7), and a gap of 0.1 mm is provided between the top of the nasal partition (6) and the inner surface of the flap-type sealing sheet (9).

4. The structure of the exhaust valve nozzle with tail speed opening of the wound valve base plate according to claim 2, characterized in that, The area of ​​the exhaust zone (8) is 50% to 60% of the total area of ​​the valve sealing port (5).

5. The structure of the exhaust valve nozzle with tail speed opening of the wound valve base plate according to claim 1, characterized in that, The flap-type sealing sheet (9) is made of liquid silicone and its thickness is gradient. The thickness of the flap-type sealing sheet (9) near the root of the sealing sheet positioning pin (10) is 0.8 mm to 1.2 mm, and the thickness of the flap-type sealing sheet (9) at the tail corresponding to the left nasal exhaust area (4) and the right nasal exhaust area (7) is 0.3 mm to 0.5 mm.

6. The structure of the exhaust valve nozzle with tail speed opening of the wound valve base plate according to claim 1, characterized in that, The adjustable exhaust pipe (2) is installed at the bottom exhaust end of the valve housing (1) via a threaded structure or a nested sliding structure.

7. The structure of the exhaust valve nozzle with tail speed opening of the wound valve base plate according to claim 1, characterized in that, The valve sealing port (5) has a recessed air inlet on the side surface near the wearer's lips.

8. The structure of the exhaust valve nozzle with tail speed opening of the wound valve base plate according to claim 1, characterized in that, The left nasal inlet (13) and the right nasal inlet (12) are funnel-shaped structures or irregular structures adapted to the physiological curve of the nostrils.

9. The structure of the exhaust valve nozzle with tail speed opening of the wound valve base plate according to claim 1 or 4, characterized in that, The inner walls of the left nasal annular tube (3) and the right nasal annular tube (11) are coated with a hydrophobic nano-coating.

10. The structure of the exhaust valve nozzle with tail speed opening of the wound valve base plate according to claim 1, characterized in that, The edge of the valve sealing port (5) is provided with a sealing protrusion for contacting the flap-type sealing sheet (9), and the surface of the sealing port has a frosted texture.

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