A face mask air inlet device

Abstract

The utility model relates to a face mask air intake auxiliary device technical field, concretely is a face mask air inlet device, including the casing, the casing is equipped with the cavity, one side of casing is connected with the filter casing, the cavity is equipped with the air duct area and installs the chamber, installs the chamber and includes power component installation area and control component installation area, the air duct area is equipped with the air intake area, the air outlet area, sets up the air duct component installation area of air intake area, drive assembly, the filter casing includes filter cavity, filter air intake, filter air outlet, the filter piece between filter air intake and filter air outlet, the support part close to filter air outlet. The utility model has realized that power component, control component integrated in the casing radial or lateral space, has effectively reduced the overall size of air intake auxiliary device, has promoted the portability and practicality, through the setting up multiple support parts, makes the filter piece be lifted and forms the gap, avoids the filter piece collapse or close to the air slot and happens deformation in the fan suction effect direction filter air outlet.

Description

Technical Field

[0001] This utility model relates to the technical field of air intake auxiliary devices for face masks, specifically a face mask air intake device. Background Technology

[0002] Protective face shields are protective equipment used to protect personnel's face and respiratory system from environmental hazards such as dust, chemical splashes, toxic gases, welding sparks, and airborne bacteria. Although existing face shields can filter dust from the air, these face shields usually have poor breathability, and the air exhaled by a person is very likely to be re-inhaled, causing secondary pollution and being harmful to the human body. To solve this problem, a face shield with a fan has appeared on the market to accelerate air circulation.

[0003] For example, the air intake auxiliary device for masks disclosed in Chinese patent document CN205948208U has its electronic components, isolation cover, and fan arranged sequentially along the axis of the air intake auxiliary device, resulting in a large overall size. In this structure, the filter pad is close to the air channel and is easily squeezed and deformed towards the air channel under the suction of the fan. Some of the filter pad blocks the air outlet of the air channel, resulting in poor airflow. Moreover, some of the material to be filtered does not make sufficient contact with the filter pad and is directly transferred to the air inlet through the gap between the deformed filter pad and the air channel, causing the user to breathe in polluted gas that has not been filtered.

[0004] As the consumer market for air intake assist devices for face masks continues to expand and consumers' demands for air intake assist devices increase, the industry urgently needs to improve existing air intake assist devices for face masks to enhance overall size miniaturization and ease of cleaning without affecting airflow transfer function. Utility Model Content

[0005] Regarding the aforementioned technical problems, such as the large overall size of the mask's air inlet device, the filter pad being close to the air duct and easily being squeezed and deformed towards the air duct under the suction of the fan, thus affecting airflow smoothness and filtration efficiency, the technical solution adopted by this utility model to solve these problems is as follows: A face mask air inlet device includes a housing with a cavity. A filter housing is connected to one side of the housing. The cavity has an air duct area and a mounting cavity. The mounting cavity includes a power component mounting area and a control component mounting area. The air duct area has an air inlet area, an air outlet area communicating with the air inlet area, an air duct component mounting area disposed in the air inlet area, and a drive component located in the air duct component mounting area and cooperating with the control component mounting area. The filter housing includes a filter cavity, a filter air inlet located on one side of the filter cavity, a filter air outlet located on one side of the filter cavity, a filter element located between the filter air inlet and the filter air outlet, and a support portion near the filter air outlet. The support portion is used to lift the filter element so that a gap is formed between the bottom of the filter element and the support portion.

[0006] Furthermore, in some embodiments of this utility model, the air inlet area is provided with an air inlet near one side of the cavity, and the air outlet area is provided with an air outlet near the other side of the cavity. The central axis of the air inlet and the central axis of the air outlet are not on the same straight line, and the air inlet area and the air outlet area do not overlap or partially overlap.

[0007] Furthermore, in some embodiments of this utility model, the housing is provided with a first housing and a second housing that enclose the cavity, the first housing and the second housing are detachably connected, the air inlet is located in the second housing and communicates with the cavity, the air outlet is disposed in the first housing and is located on the side away from the second housing, the central axis of the air inlet does not coincide with the central axis of the second housing, and the central axis of the air outlet does not coincide with the central axis of the first housing.

[0008] Furthermore, in some embodiments of this utility model, the second housing is provided with a buckle connected to the component, a second housing mounting groove for the buckle to slide, an elastic element located between the buckle and the second housing mounting groove, and a second housing cover plate connected to the upper side of the second housing mounting groove. The buckle is provided with a sliding end located in the second housing mounting groove and a buckle end connected to the sliding end. The buckle is L-shaped. The second housing cover plate is used to restrict the buckle from moving up and down. The second housing cover plate is provided with a second housing cover plate opening for the buckle end to extend out.

[0009] Furthermore, in some embodiments of this utility model, the air duct area is provided with an air duct assembly, the air duct assembly is provided with a baffle rib disposed between the air inlet area and the air outlet area, the baffle rib is disposed on the side near the air inlet, the baffle rib extends from the cavity toward the air inlet, and the extension direction of the baffle rib is parallel to the air inlet direction of the air inlet.

[0010] Furthermore, in some embodiments of this utility model, the baffles form a closed shape, the baffles are arc-shaped, the area of ​​the air inlet area is larger than the area of ​​the air outlet area, and the baffles include a first baffle located in the air inlet area and a second baffle connected to the first baffle and located in the air outlet area. The first baffle is arc-shaped and the second baffle is arc-shaped.

[0011] Furthermore, in some embodiments of this utility model, the cavity is provided with a locking end near the air outlet, the extension height of the locking end is less than the extension height of the baffle, the air outlet is provided with a locking groove for the mask to extend into, the locking end is V-shaped, the cavity is provided with an extension near the air outlet, the extension and the second baffle form an air guiding gap, the extension is provided with a plurality of connecting ribs and a connecting part connected to the connecting ribs, the locking end is located between two of the connecting ribs, a hollow opening communicating with the air outlet is provided between the plurality of connecting ribs, and / or the connecting part is provided with a hollow opening communicating with the air outlet.

[0012] Furthermore, in some embodiments of this utility model, the filter element includes a filter section, a first ventilated section located between the filter section and the support section, and a second ventilated section located between the filter air inlet and the filter section.

[0013] Furthermore, in some embodiments of this utility model, a plurality of the supporting portions extend radially from the filter outlet toward the inner wall of the filter cavity, and a guide space communicating with the filter outlet is formed between two adjacent supporting portions.

[0014] Furthermore, in some embodiments of this utility model, the filter housing is arc-shaped, the filter inlet is larger than the filter outlet, the central axis of the filter outlet does not coincide with the central axis of the filter housing, and the housing and / or the filter housing is elliptical, pebble-shaped, or teardrop-shaped.

[0015] The beneficial effects of this utility model are as follows: This invention separates the power supply and control components from the air duct area, achieving radial or lateral spatial integration of the power supply and control components within the housing. This avoids the volume redundancy caused by traditional coaxial straight-line structures, effectively reducing the overall size of the air intake auxiliary device and improving portability and practicality. Furthermore, this invention incorporates multiple support portions extending from the filter outlet towards the inner wall of the filter chamber within the filter housing. This lifts the filter element and creates a gap with its bottom, effectively preventing the filter element from collapsing towards the filter outlet or deforming due to close contact with the air duct under fan suction. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a face mask air inlet device according to the present invention.

[0017] Figure 2 for Figure 1 AA sectional view.

[0018] Figure 3 This is a schematic diagram of the filter housing of this utility model.

[0019] Figure 4 for Figure 3 BB cross-sectional view.

[0020] Figure 5 This is a schematic diagram of the filter housing of this utility model from another perspective.

[0021] Figure 6 This is an exploded view of the filter housing of this utility model.

[0022] Figure 7 This is a top view of the second housing of this utility model.

[0023] Figure 8 This is a schematic diagram of the second housing of this utility model.

[0024] Figure 9 This is a schematic diagram of the second housing of this utility model from another angle.

[0025] Figure 10 This is a schematic diagram of the housing of this utility model.

[0026] Figure 11 for Figure 10 CC section view.

[0027] Figure 12 This is a schematic diagram of the housing of this utility model from another angle.

[0028] Figure 13 This is an exploded view of the shell of this utility model.

[0029] Figure 14 This is a schematic diagram of the housing of this utility model (the first housing is omitted).

[0030] Figure 15 This is a schematic diagram of the second housing of this utility model. Detailed Implementation

[0031] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings. The described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0032] It should be noted that all directional indications in this utility model embodiment, such as (up, down, left, right, front, back, etc.), are only used to explain the relative positional relationship and movement of each component in a specific posture (as shown in the attached figure). If the specific posture changes, the directional indication will also change accordingly.

[0033] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0034] Example 1 like Figures 1 to 15 The mask air intake device shown includes a housing 1, a cavity 2, and a filter housing 6 connected to one side of the housing 1. The cavity 2 has an air duct area 21 and a mounting cavity 22. The mounting cavity 22 includes a power component mounting area 221 and a control component mounting area 222. The air duct area 21 has an air inlet area 211, an air outlet area 212 communicating with the air inlet area 211, an air duct component mounting area 213 disposed in the air inlet area 211, and a control component mounting area 222 located in the air duct component mounting area 213 and connected to the control component mounting area 222. The drive assembly 2140 is configured in conjunction with the component installation area 222. The filter housing 6 includes a filter cavity 60, a filter air inlet 61 located on one side of the filter cavity 60, a filter air outlet 62 located on one side of the filter cavity 60, a filter element 64 located between the filter air inlet 61 and the filter air outlet 62, and a support portion 63 near the filter air outlet 62. The support portion 63 is used to lift the filter element 64 so that a gap 65 is formed between the bottom of the filter element 64 and the support portion 63.

[0035] This invention separates the power supply and control components from the air duct area, achieving radial or lateral spatial integration of the power supply and control components within the housing. This avoids the volume redundancy caused by traditional coaxial straight-line structures, effectively reducing the overall size of the air intake auxiliary device and improving portability and practicality. The air intake area, air outlet area, and air duct component installation area are concentrated within the air duct area, facilitating overall disassembly and cleaning. Its airflow path is more direct, reducing multiple bends and transfers in traditional structures, lowering airflow resistance and noise, and improving air intake efficiency.

[0036] Specifically, one side of the power component mounting area 221 and / or the control component mounting area 222 is disposed along the inner wall of the housing 1, and the other side is disposed in conjunction with the outer wall of the air duct area 21.

[0037] Specifically, the power supply and control components are independently housed in the mounting cavity, which is relatively separated from the air duct area. This not only reduces the impact of dust and moisture on electronic components, but also makes it easier for users to disassemble, clean, or replace the air duct components or electronic modules individually, thus improving the maintainability and service life of the device.

[0038] Optionally, in some embodiments, the power supply components and control components are distributed on the inner wall of the housing. The power supply components, control components and air duct area are naturally separated by the housing structure, which not only ensures the installation stability of electronic components, but also facilitates natural heat dissipation and avoids heat concentration. Specifically, when the airflow passes through the air duct area, it can simultaneously carry away the surrounding heat, without the need for additional heat dissipation structure. This not only optimizes the heat dissipation effect, but also further simplifies the overall structure and reduces the assembly difficulty.

[0039] This invention features multiple support portions extending from the air outlet towards the inner wall of the filter chamber within the filter housing. This elevates the filter element and creates a gap between it and its bottom, effectively preventing the filter element from collapsing towards the air outlet or deforming due to close contact with the air duct under fan suction. This structure ensures that airflow smoothly enters the air outlet through the bottom gap after passing through the filter element, preventing the filter element from clogging the air duct or creating gaps with the edge of the air outlet, thus preventing unfiltered air from short-circuiting into the user's breathing area.

[0040] Specifically, the support section provides uniform support for the filter element, creating a gap between the bottom of the filter element and the air outlet. This prevents the filter element from collapsing due to airflow pressure, effectively avoiding deformation of the filter element towards the air outlet when the fan draws air in. This eliminates the risk of air leakage through gaps, ensures unobstructed airflow, improves airflow smoothness, maximizes the contact area between the filter element and the airflow, and enhances filtration efficiency. At the same time, the gap allows airflow to pass smoothly through the bottom of the filter element, avoiding local airflow blockage caused by filter element deformation. This improves overall airflow smoothness, reduces breathing resistance, and lowers the risk of unfiltered pollutants directly entering the breathing zone.

[0041] Specifically, the filter element can be a filter pad, filter cotton, silica gel, activated carbon, or other materials.

[0042] Optionally, in some embodiments, the bottom of the filter cavity is flat, and the height of the gap is close to the height of the support portion.

[0043] Optionally, in some embodiments, the arrangement of multiple supports and gaps ensures that the filter element does not completely contact the bottom of the filter chamber under air pressure suction.

[0044] Optionally, in some embodiments, the filter device may be disposable or replaceable by replacing the filter elements, thereby extending the service life of the filter device.

[0045] like Figure 8 and Figure 15 The mask air intake device shown has an air intake area 211 with an air intake 40 near one side of the cavity 2 and an air outlet area 212 with an air outlet 30 near the other side of the cavity 2. The central axis of the air intake 40 and the central axis of the air outlet 30 are not on the same straight line, and the air intake area 211 and the air outlet area 212 do not overlap or partially overlap.

[0046] The cavity of this utility model adopts an integrated air inlet and outlet area, reducing the complex assembly structure of traditional multi-part components and avoiding cleaning omissions caused by disassembling multiple parts. By setting the central axis of the air inlet and outlet to be on different straight lines, and ensuring that the air inlet and outlet areas do not overlap or only partially overlap, the internal structure layout of the air duct is optimized while ensuring effective airflow transfer. This avoids cleaning dead corners caused by the complex bending of the air duct and the nesting of components in traditional solutions. It allows the drive component, air duct component and each area to be independently exposed, easy to disassemble or wash, improving cleaning convenience and drying efficiency, effectively preventing dirt residue and bacterial growth, thereby improving the hygiene and safety of the mask and the user experience.

[0047] Specifically, the air intake area is designed to be open, and the air duct assembly directly connects the air intake area and the air outlet area. This reduces the complex assembly structure of traditional multi-part components such as isolation covers and outer shells, making the air duct interior free of hidden dead corners. Users can quickly disassemble and clean the entire unit, avoiding cleaning omissions caused by disassembling multiple parts.

[0048] Specifically, the air inlet and outlet areas are integrated, ensuring efficient airflow while reducing unnecessary ductwork detours, resulting in smoother air circulation. The central axes of the air inlet and outlet are not on the same straight line, and the air inlet and outlet areas do not overlap or only partially overlap. This allows the airflow to naturally change direction during transfer, preventing the air from directly transferring from the air inlet area to the air outlet area. This avoids the short residence time of airflow caused by filters such as activated carbon and filter cotton located outside the air inlet or outlet areas, which cannot fully contact pollutants such as dust, harmful particles, or aerosols. If the contact time between the filter and the filter is reduced, the filter cannot be fully intercepted or adsorbed, which will reduce the overall filtration performance and affect the respiratory protection effect.

[0049] If the air intake area and the air outlet area overlap and the airflow passes through in a straight line at high speed, the high speed of the straight airflow will easily create turbulence in the air outlet area, and may even cause local airflow impact, resulting in fluctuations in breathing resistance and affecting breathing smoothness.

[0050] Optionally, in some embodiments, the air inlet area is provided with a drive component 2140, which cooperates with the air duct component 5 to drive the airflow to move in a predetermined direction. The drive component can be a fan or an air pump. Of course, in some embodiments, the drive component can be located on the outer side near the air outlet area to drive the airflow; of course, in other embodiments, the drive component can be located on the outer side near the air inlet area.

[0051] like Figures 10 to 14 The mask air intake device shown has a housing 1 with a first housing 3 and a second housing 4 that enclose and form a cavity 2. The first housing 3 and the second housing 4 are detachably connected. The air inlet 40 is located in the second housing 4 and communicates with the cavity 2. The air outlet 30 is located in the first housing 3 and is located on the side away from the second housing 4. The central axis of the air inlet 40 does not coincide with the central axis of the second housing 4, and the central axis of the air outlet 30 does not coincide with the central axis of the first housing 3.

[0052] The housing 1 is provided with a first connecting post 11 located in the first control component mounting area 2221 and a second connecting post 12 located in the second control component mounting area 2222. The first connecting post 11 is used to limit the first control component 111 located in the first control component mounting area 2221, and the second connecting post 12 is used to limit the second control component 121 located in the second control component mounting area 2222. The first connecting post 11 and the second connecting post 12 are located in the first housing 3, and the second housing 4 is provided with a second housing connecting groove 401 that respectively mates with the first connecting post 11 and the second connecting post 12.

[0053] Furthermore, as a preferred embodiment of this utility model and not a limitation thereof, this utility model features a first connecting post and a second connecting post in the first housing, and a corresponding connecting groove in the second housing. The two work together to achieve rapid positioning and assembly of the first and second housings, improving the accuracy and efficiency of housing assembly while ensuring the sealing performance of the cavity and preventing air leakage from affecting ventilation. The cooperative design of the connecting post and connecting groove, combined with the arc-shaped housing design, not only serves a positioning function but also forms a stable snap-fit ​​or limiting structure after assembly, enhancing the overall mechanical strength and deformation resistance of the housing and ensuring that it is not easily loosened or damaged during wear or use.

[0054] Optionally, in some embodiments, the first housing and the second housing can also be fixed together by means of snap-fit ​​connection, magnetic connection, threaded connection, mortise and tenon connection, or fastener connection such as screw connection.

[0055] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the air inlet and air outlet of the present invention adopt an asymmetrical, non-coaxial and non-linear through-flow layout design, so that the intake airflow and the exhaust airflow form independent and staggered flow paths within the housing, effectively avoiding airflow short-circuiting or mutual interference, reducing eddies and turbulence, thereby reducing wind resistance and airflow noise, and improving intake efficiency.

[0056] Specifically, the central axes of the air inlet and outlet are offset and not collinear. Combined with the relatively independent setting of the air inlet area and the air outlet area, this can effectively prevent the cross-mixing of filtered airflow and external untreated airflow, reducing the risk of repeated intake or airflow recirculation.

[0057] like Figures 11 to 14 The mask air intake device shown has a second housing 4 with a buckle 41 connected to a component, a second housing mounting groove 42 for the buckle 41 to slide, an elastic element 43 located between the buckle 41 and the second housing mounting groove 42, and a second housing cover plate 44 connected to the upper side of the second housing mounting groove 42. The buckle 41 has a sliding end 411 located in the second housing mounting groove 42 and a buckle end 412 connected to the sliding end 411. The buckle 41 is L-shaped. The second housing cover plate 44 is used to restrict the up and down movement of the buckle 41. The second housing cover plate 44 has a second housing cover plate opening 441 for the buckle end 412 to extend out.

[0058] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the present invention uses a combination structure of an L-shaped buckle, a sliding mounting groove, an elastic element, and a limiting cover plate in the second housing to achieve quick snap-fit ​​fixing of components to the housing without the need for additional fastening tools, simplifying the assembly process and improving assembly efficiency. At the same time, the elastic element enables the buckle to have a buffer reset capability, ensuring the stability and reliability of the connection.

[0059] Specifically, the latch slides within the mounting groove via its sliding end, and the cover plate restricts its vertical displacement. This ensures the accuracy of the latch's action and prevents it from loosening or shifting during use. Furthermore, the L-shaped structure optimizes the force distribution on the latch, improving connection strength and eliminating the need for additional cavity space, making it suitable for miniaturized device designs. Specifically, when external force is applied, the latch is compressed, overcoming the elastic force of the elastic element to unlock. After the external force is removed, the elastic element pushes the latch back to its original position, achieving automatic locking.

[0060] Specifically, pressing the buckle end releases the connection with the component, making disassembly convenient. Combined with the detachable structure of the housing, it facilitates quick disassembly of components for cleaning or replacement.

[0061] like Figures 7 to 9The mask air intake device shown has an air duct assembly 5 in the air duct area 21. The air duct assembly 5 has a baffle 51 disposed between the air intake area 211 and the air outlet area 212. The baffle 51 is disposed on the side near the air inlet 40 and extends from the cavity 2 toward the air inlet 40. The baffle 51 is integrally formed.

[0062] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the baffle extends from the cavity toward the air inlet, and its extension direction is parallel to the air inlet direction. This can effectively guide the airflow to concentrate and enter the air duct, reduce the phenomenon of airflow dispersion or turbulence, prevent the airflow from directly short-circuiting into the air outlet area, and improve the stability of airflow guidance.

[0063] Specifically, the baffles can block the reverse flow of some gas or filtered air, preventing contaminated gas from re-entering the air intake area, thereby reducing the possibility of secondary pollution and improving respiratory safety.

[0064] Furthermore, the one-piece molded baffle improves the overall strength and sealing of the air duct assembly, reduces assembly gaps and potential leakage points, and acts as an airflow buffer structure to mitigate the direct impact of high-speed airflow on the inner wall of the air duct. The baffle has a simple structure, is easy to mold, and does not form complex bends, which facilitates water flow during cleaning, making it easy to clean and dry quickly.

[0065] like Figures 7 to 9 The mask air intake device shown has a cavity 2 integrally formed, and baffles 51 enclose it to form a sealed shape. The baffles 51 are arc-shaped. The area of ​​the air intake region 211 is larger than the area of ​​the air outlet region 212. The baffles 51 include a first baffle 511 located in the air intake region 211 and a second baffle 512 connected to the first baffle 511 and located in the air outlet region 212. The first baffle 511 is arc-shaped, and the second baffle 512 is arc-shaped. The extension direction of the baffles 51 is parallel to the air intake direction of the air inlet 40. The airflow in the air intake region 211 is transferred horizontally to the air outlet region 212.

[0066] Furthermore, as a preferred embodiment of this utility model and not a limitation thereof, the one-piece molded cavity improves the strength and sealing of the overall structure, reduces assembly gaps and potential air leakage points, effectively prevents dust or liquid from seeping into the air duct, simplifies the overall structure, facilitates thorough cleaning by users, avoids cleaning dead corners, and ensures hygiene and safety.

[0067] Specifically, the baffles form a closed shape and are arranged in an arc, which can smoothly guide the airflow direction, reduce airflow impact and turbulence, reduce noise, and at the same time enhance the structural strength of the air duct and improve durability.

[0068] Specifically, by increasing the area of ​​the air intake area, the air intake volume can be effectively increased. Combined with the shrinking design of the air outlet area, the air outlet area is relatively concentrated, realizing the convergence and acceleration of airflow, enhancing the air delivery effect, ensuring sufficient air supply inside the mask, making the airflow output more stable, and improving wearing comfort.

[0069] Specifically, the air inlet's air intake direction is parallel to the air outlet's air outlet direction, and the airflow is transferred horizontally. This facilitates a compact layout within a limited space, avoids airflow path intersections or reverse flow, reduces airflow interference, ensures smooth airflow, and at the same time reduces gas backflow and improves breathing safety.

[0070] like Figures 7 to 9 The mask air inlet device shown has a cavity 2 with a locking end 23 near the air outlet 30. The extension height of the locking end 23 is less than the extension height of the baffle 51. The air outlet 30 has a locking groove 301 for the mask to extend into. The locking end 23 is V-shaped. The cavity 2 has an extension 24 near the air outlet 30. An air guide gap 25 is formed between the extension 24 and the second baffle 512. The extension 24 has a plurality of connecting ribs 241 and a connecting part 242 connected to the connecting ribs 241. The locking end 23 is located between two connecting ribs 241. A hollow opening 2411 communicating with the air outlet 30 is provided between the plurality of connecting ribs 241, and / or the connecting part 242 has a hollow opening 2411 communicating with the air outlet 30.

[0071] Furthermore, as a preferred embodiment of this utility model and not a limitation thereof, the engaging end is V-shaped and the air outlet is provided with an engaging groove, which can guide the mask to be quickly aligned and inserted to complete the engaging and fixing, making the assembly operation simple and efficient and improving the user's convenience; the V-shaped structure also increases the engaging contact area, ensuring the connection stability after assembly.

[0072] Specifically, the extension height of the locking end is less than that of the baffle rib, preventing the locking structure from obstructing the baffle rib and the internal area of ​​the air duct. During cleaning, it can directly contact the air duct area and the surface of the baffle rib, eliminating cleaning dead corners and allowing for more thorough rinsing and wiping. The V-shaped design and height-adaptive structure of the locking end do not occupy the effective flow space of the air duct and do not obstruct the airflow from the air outlet area to the mask side, ensuring that the ventilation efficiency is not affected by the assembly structure. At the same time, the V-shaped locking end can assist in guiding the airflow and reduce turbulence around the air outlet.

[0073] Specifically, the extension and the second baffle form a guide gap, which can guide the airflow at the outlet for a second time. This allows the airflow to be smoothly guided along the outside of the arc-shaped baffle when it enters the outlet area from the diffusion zone. After the airflow is evenly diffused through the guide gap, it is output through the outlet, further optimizing the airflow distribution, reducing eddies and pressure loss, and improving the uniformity and efficiency of the outlet.

[0074] Specifically, the extension is connected to the connecting part through multiple connecting ribs, which reduces the amount of material used while ensuring the structural strength of the extension and achieving a lightweight design. The spacing of the connecting ribs forms a hollow opening to avoid affecting the airflow efficiency due to the extension being completely closed.

[0075] Specifically, the perforations between and / or at the connection points of multiple connecting ribs are directly connected to the air outlet, forming an auxiliary airflow channel. This multi-channel air outlet structure effectively increases the air outlet area, allowing some airflow to quickly flow to the air outlet through the perforations, reducing air outlet resistance and improving overall air outlet efficiency.

[0076] Specifically, the locking end is located between two connecting ribs. It enhances the structural stability of the locking end with the support of the connecting ribs, and through the cooperation between the connecting ribs and the locking end, it clamps and seals the edge of the cover, reducing air leakage from the air outlet and improving airflow utilization. At the same time, the hollowed-out design prevents the locking end area from being completely closed and obstructing airflow, ensuring the coordinated optimization of sealing and air outlet.

[0077] like Figure 6 The mask air intake device shown includes a filter element 64 comprising a filter section, a first ventilated section 641 located between the filter section and the support section 63, and a second ventilated section 642 located between the filter air inlet 61 and the filter section.

[0078] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the first vent is located between the filter and the support, which can further lift the filter to ensure that the airflow flows smoothly in the gap at the bottom of the filter element and flows to the filter outlet through the gap, thereby reducing breathing resistance.

[0079] Specifically, the first breathable part can be non-woven fabric, which can play a preliminary guiding and dispersing role for the airflow, prevent it from deforming under the suction action of the driving components such as air pumps and fans, and guide the gas to be filtered to flow evenly through the filter part, avoid gas short circuit, and improve the filtration uniformity and overall filtration efficiency.

[0080] Optionally, in some embodiments, the first ventilated part can be fixedly connected to the support part by adhesive or ultrasonic connection. The first ventilated part can also be placed directly on the support part and can be replaced at any time.

[0081] Alternatively, in some embodiments, the filter element may be a material such as silica gel or activated carbon.

[0082] The second vent can initially buffer and evenly distribute the airflow entering the filter chamber, reducing the local high pressure generated when the airflow directly impacts the filter section, thereby reducing the risk of deformation or displacement of the filter section due to uneven airflow.

[0083] Specifically, the second breathable part can be made of non-woven fabric, which has good air permeability and airflow guiding properties. It can guide the airflow smoothly to the filter part, reduce the impact of the airflow on the filter part, reduce the loss of the filter part caused by airflow scouring, extend the service life of the filter element, maintain the smooth flow of airflow, avoid the increase of air intake resistance, and improve the stability of filtration efficiency. The second breathable part can also play a pre-filtration role, intercepting some large particulate impurities, reducing the burden on the filter part, and extending its service life.

[0084] Optionally, in some embodiments, the second vent can be fixedly connected to the upper side of the filter cavity or the bottom of the upper filter housing by adhesive bonding or ultrasonic connection. The second vent can also be directly fixed to the support or the first vent. Of course, the second vent can also be directly covered on the upper side of the filter and can be replaced at any time.

[0085] Optionally, in some embodiments, the first ventilated part 641 is fixed to the support part 63, the second ventilated part 642 is fixedly connected to the first ventilated part 641, and the second ventilated part 642 and the first ventilated part 641 surround and cover the filter part.

[0086] Specifically, the first vent is fixed to the support, forming a stable support base, which can effectively prevent the filter from shifting or deforming under the suction of the fan, ensuring the stability of the airflow channel. The second vent is fixedly connected to the first vent and surrounds the filter, making the filter form a closed filter cavity, ensuring that the gas to be filtered flows completely through the filter, preventing unfiltered gas from leaking from the gaps, and improving the reliability of filtration.

[0087] Specifically, the filter section is completely covered by the first and second air-permeable sections, which not only provides physical protection for the filter section, reducing the loss caused by external impacts or airflow scouring and extending the service life of the filter element, but also enables the modular integrated design of the filter element, facilitating overall disassembly and replacement and improving ease of use.

[0088] like Figure 6 The mask air inlet device shown has multiple support portions 63 extending radially from the filter outlet 62 toward the inner wall of the filter cavity 60, and a guide space 631 communicating with the filter outlet 62 is formed between two adjacent support portions 63.

[0089] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the radially distributed support structure can effectively guide the filtered airflow, so that the airflow flows evenly and directionally towards the filter outlet along the guide space, thereby improving the uniformity of airflow and the air outlet efficiency, and avoiding local airflow congestion or turbulence.

[0090] Specifically, the radially arranged support portion can provide multi-point uniform support for the filter element, preventing it from undergoing local deformation or displacement under air pressure. This ensures that the contact area between the filter element and the airflow is maximized. Combined with the uniform air intake of the mesh-shaped air inlet, it achieves uniform distribution and flow of airflow within the filter cavity, ensuring that all areas of the filter element fully participate in filtration, avoiding local filtration blind spots, and improving filtration efficiency and uniformity. Its structure is simple and easy to process, without increasing the manufacturing difficulty and cost of the filter housing.

[0091] In addition, the guide space formed between adjacent support parts constitutes an airflow channel, which guides the filtered clean air to gather in an orderly manner to the filter outlet, which can reduce airflow diffusion loss and improve airflow concentration and breathing comfort.

[0092] like Figures 3 to 6 The mask air intake device shown has an arc-shaped filter housing 6, a filter air inlet 61 that is larger than the filter air outlet 62, and the central axis of the filter air outlet 62 does not coincide with the central axis of the filter housing 6. The housing 1 and / or the filter housing 6 are elliptical, pebble-shaped, or teardrop-shaped.

[0093] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the filter housing is designed in an arc shape, which can optimize the airflow path in the filter cavity, reduce airflow stagnation and resistance, and the filter inlet is larger than the filter outlet, which increases the air intake area, which is conducive to increasing the air intake volume and reducing the air intake velocity, reducing breathing resistance and improving ventilation efficiency.

[0094] Specifically, the central axis of the filter outlet does not coincide with the central axis of the lower filter housing, which causes the airflow flowing out of the filter outlet to form an offset guide, avoiding the airflow directly impacting the user's respiratory tract, improving breathing comfort, and reducing the risk of secondary pollution caused by exhaled air flowing back into the filter chamber.

[0095] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the filter housing adopts an elliptical, pebble-shaped, or teardrop-shaped design with a smooth and rounded shape, which helps to reduce the overall volume of the mask, improve the fit and comfort of wearing it, and at the same time, the smooth shape can reduce airflow resistance and optimize intake and exhaust efficiency. Its regular contour structure also facilitates processing and manufacturing and the assembly and adaptation of external components.

[0096] Example 2 Based on Example 1, Example 2 also has the following implementation method: like Figures 13 to 15 As shown, the control component mounting area 222 includes a first control component mounting area 2221 and a second control component mounting area 2222, and the power component mounting area 221 is located between the first control component mounting area 2221 and the second control component mounting area 2222.

[0097] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the present invention places the power supply component mounting area between the first control component mounting area and the second control component mounting area. The power supply component is surrounded or spaced apart by the control component mounting areas on both sides. This layout makes full use of the internal space of the housing, realizes the compact arrangement of the control component and the power supply component in the mounting cavity, optimizes the distribution structure of the internal components, reduces local space stacking, and helps to reduce the overall volume and improve space utilization.

[0098] Specifically, the connection path between the power supply component and the two sets of control components is shorter, which simplifies the wiring structure, reduces assembly complexity, facilitates the balanced distribution and conduction of heat, and improves the overall heat dissipation stability.

[0099] Example 3 Based on Example 2, Example 3 also has the following implementation method: like Figures 13 to 15 As shown, the first control component mounting area 2221 is arranged in an arc shape along the inner wall of the housing 1 on one side, and the second control component mounting area 2222 is arranged in an arc shape along the inner wall of the housing 1 on one side. Part of the power component mounting area 221 is located between the first control component mounting area 2221 and the second control component mounting area 2222. The air duct area 21 is located between the first control component mounting area 2221 and the power component mounting area 221.

[0100] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the spatial layout of the control component mounting area is more compact and conforms to the curved structure of the housing, which is conducive to improving space utilization and reducing the overall thickness; part of the power component mounting area is located between the first control component mounting area and the second control component mounting area, forming a surrounding or segmented integrated layout, which further optimizes the radial arrangement of electronic components, helps to reduce the axial dimension, and realizes the miniaturization of the device.

[0101] Specifically, the air duct area is independently set between the first control component installation area and the power component installation area to avoid direct contact or interference between airflow and electronic components, making the intake airflow path more direct and smooth, reducing multiple turns and obstructions in the traditional structure, thereby reducing wind resistance and airflow noise, and improving intake efficiency.

[0102] Specifically, the control components and power supply components are set up relatively independently and separated from the air duct area, which makes it easy for users to disassemble, clean or replace the air duct components, filters or electronic modules separately, reducing maintenance difficulty. At the same time, the arc-shaped structure design reduces dead corners and dust accumulation areas, further improving cleaning convenience.

[0103] Example 4 Based on Example 3, Example 4 also has the following implementation method: like Figures 13 to 15 As shown, the housing 1 is arc-shaped, part of the outer wall of the air duct area 21 is arc-shaped, the air duct component mounting area 213 is provided with a drive component mounting area 214 that cooperates with the control component mounting area 222, one side of the power component mounting area 221 and / or the control component mounting area 222 is arc-shaped along the inner wall of the housing 1, and the other side cooperates with the arc-shaped outer wall of the air duct area 21.

[0104] Furthermore, as a preferred embodiment of this utility model and not a limitation, a portion of the outer wall of the air duct area is arc-shaped, consistent with the overall shape of the housing, which facilitates smooth airflow, reduces eddy resistance, and improves ventilation efficiency. The air duct component installation area is provided with a drive component installation area that cooperates with the control component installation area, which facilitates the close placement of drive components such as fans and air pumps with the control circuit, shortening the connection lines. One side of the power component installation area and / or the control component installation area is arc-shaped along the inner wall of the housing, and the other side cooperates with the arc-shaped outer wall of the air duct area to form a tightly fitting spatial nesting structure, making full use of the curved space inside the housing, realizing the efficient integration of electronic components and the air duct system, improving space utilization, and reducing the overall volume.

[0105] Example 5 Example 5, based on Example 4, also has the following implementation method: like Figures 13 to 15 As shown, the first housing 3 is provided with a switch assembly 31 for cooperating with the first control component mounting area 2221 and / or the second control component mounting area 2222, a charging connection port 32 for cooperating with the power component mounting area 221, and a first power component mounting groove 33 extending away from the second housing 4. The second housing 4 is provided with a second power component mounting groove extending away from the first housing 3. The first power component mounting groove 33 and the second power component mounting groove together form the power component mounting area 221.

[0106] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the power component can be accurately positioned and firmly fixed in the housing through the enclosing structure of the first power component mounting slot and the second power component mounting slot, ensuring that the power component, such as the battery, is installed stably and not easily loosened, improving the installation firmness and shock resistance, while making the layout of the power component more compact and efficient, optimizing the utilization rate of the internal space of the housing, and helping to reduce the overall size of the device.

[0107] Specifically, the switch assembly and charging port are directly located in the first housing and are installed in conjunction with the control assembly area, so that the power control and charging functions are integrated in the same housing area, which is convenient for user operation and daily use. At the same time, the power assembly is modularly assembled through corresponding mounting slots in the two housings, which simplifies the assembly process, improves production efficiency, and reduces assembly difficulty.

[0108] Example 6 Example 6, based on Example 1, also has the following implementation method: like Figures 7 to 9 As shown, the first baffle 511 is provided with a first connecting section 5111 and a second connecting section 5112 connected to the first connecting section 5111. The air inlet area 211 includes an air guiding area 21101 located in the first connecting section 5111 and a diffusion area 21102 located in the second connecting section 5112. The central axis of the drive assembly 2140 is located on the side close to the air guiding area 21101.

[0109] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the first baffle is provided with a first connecting section and a second connecting section that are connected to each other, correspondingly forming a guide zone and a diffusion zone. This allows the airflow to be initially rectified in the guide zone and then evenly diffused in the diffusion zone, effectively improving the airflow organization in the air intake area, ensuring sufficient air intake near the drive component, and improving air intake efficiency.

[0110] Specifically, by setting the central axis of the drive component on the side close to the air guide zone, the directional airflow after rectification by the first connecting section enters the air guide zone. The air guide zone is located on the initial path of the airflow and plays a directional guiding role in the airflow, reducing energy loss caused by ineffective air intake or eddies. Subsequently, the airflow enters the diffusion zone, and under the action of the arc structure of the second connecting section, the airflow expands and is evenly distributed, reducing flow velocity fluctuations and improving the stability of the air outlet.

[0111] Specifically, the connection between the first and second connecting sections allows the airflow to gradually transition from concentrated inlet to uniform diffusion, avoiding sudden changes in airflow direction or localized high pressure, thereby reducing noise inside the duct.

[0112] Example 7 Example 7, based on Example 6, also has the following implementation method: like Figures 7 to 9 As shown, the second connecting segment 5112 includes a first changing segment 51121 connected to the first connecting segment 5111 and a second changing segment 51122 connected to the first changing segment 51121. The curvature of the first changing segment 51121 is less than that of the first connecting segment 5111, and the curvature of the second changing segment 51122 is less than that of the first changing segment 51121.

[0113] Specifically, the curvature of the first and second transition sections decreases sequentially, forming a gradually changing arc-shaped airflow path. This guides the airflow smoothly from the guide zone to the diffuser zone, avoiding turbulence and increased resistance caused by abrupt changes in curvature. It effectively reduces the impact of airflow on the baffles, improving intake smoothness. Furthermore, the gentle curvature change suppresses airflow separation and vortex generation, reducing noise caused by turbulent airflow within the duct and preventing component vibration due to airflow impact.

[0114] Specifically, the segmented structure with gradually changing curvature has a smooth transition, without sharp edges or hidden corners, making it difficult for dust and stains to adhere and accumulate. When cleaning, it can be directly rinsed and wiped along the curved surface, making it convenient to operate and cleaning more thoroughly, reducing the risk of incomplete drying.

[0115] Specifically, when the airflow enters the diffusion zone after passing through the guide zone, it gradually transitions smoothly from the first connecting section to the first changing section and then to the second changing section, with the curvature decreasing step by step, forming a gradually expanding guide path. This can effectively reduce the flow resistance at the bend of the airflow, reduce eddies and separation phenomena, and make the airflow diffuse more smoothly and evenly and guide it to the outlet area, thereby improving the overall aerodynamic performance and air delivery efficiency of the duct.

[0116] Example 8 Example 8, based on Example 7, further includes the following implementation method: like Figures 7 to 9 As shown, the second baffle 512 includes a third connecting segment 5121 connected to the second variation segment 51122, and a fourth connecting segment 5122 connected to the third connecting segment 5121 and the first connecting segment 5111. The curvature of the third connecting segment 5121 is less than that of the fourth connecting segment 5122, and the fourth connecting segment 5122 forms a V-shaped angle with the first connecting segment 5111.

[0117] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the third connecting section smoothly connects to the end of the diffusion zone with a small curvature, guiding the airflow smoothly into the outlet area, reducing flow resistance and turbulence intensity, and improving the uniformity of the outlet airflow and the rectification effect.

[0118] like Figures 7 to 9 As shown, the curvature of the third connecting section of the second baffle is less than that of the fourth connecting section, forming a guide structure with gradually changing curvature. When the airflow enters the third connecting section from the second changing section, it first undergoes a smooth transition to reduce the flow velocity, and then achieves directional convergence through the fourth connecting section with increased curvature. This avoids the impact or turbulence caused by sudden changes in airflow and improves the airflow stability in the outlet area.

[0119] like Figures 7 to 9As shown, the fourth connecting section forms a V-shaped angle with the first connecting section. Through the directional converging effect of the baffles on both sides, the diffused airflow is re-converged and guided to the air outlet, reducing the risk of airflow dispersion or backflow to the air inlet area, improving air utilization, and ensuring the concentration and effectiveness of air supply inside the mask.

[0120] like Figures 7 to 9 As shown, the smooth curvature transition of the third connecting section and the controllable convergence structure of the fourth connecting section work together to suppress airflow separation and vortex generation, reduce noise sources inside the air duct, reduce the additional load on the drive components caused by airflow turbulence, extend the device's battery life, and improve wearing comfort.

[0121] Optionally, in some embodiments, the second transition section and the third connecting section extend in a near-linear manner and narrow, so that the diffused airflow is re-converged under the directional convergence of the fourth connecting section and directed to the air outlet.

[0122] Example 9 Example 9, based on Example 1, also has the following implementation method: like Figures 3 to 6 As shown, the filter housing 6 includes an upper filter housing 66 and a lower filter housing 67 that surround and form the filter cavity 60. The upper filter housing 66 is provided with an upper engaging groove 661, into which the outer edge of the lower filter housing 67 extends and engages.

[0123] Furthermore, as a preferred embodiment of this utility model and not a limitation thereof, the upper filter housing and the lower filter housing are engaged and assembled through an upper engaging groove, which has a simple structure, is easy to disassemble and assemble, and facilitates the replacement of filter elements and the cleaning and maintenance of the filter chamber.

[0124] Specifically, the outer edge of the lower filter housing extends into the upper locking groove to form a tight-fitting locking structure, which can effectively enhance the sealing performance of the filter housing, prevent the gas to be filtered from leaking from the gaps in the housing joints, and ensure the sealing effect of filtration.

[0125] Optionally, in some embodiments, the upper filter housing and the lower filter housing can be further fixed by means of snap-fit ​​connection, magnetic connection, threaded connection, fastener connection, mortise and tenon connection, etc.

[0126] Example 10 Example 10, based on Example 9, also has the following implementation method: like Figures 3 to 6As shown, the upper filter housing 66 is provided with housing ribs 662 and upper filter housing openings 663. The housing ribs 662 extend away from the lower filter housing 67. The upper filter housing openings 663 are provided with a plurality of mesh-like evenly arranged openings. The filter air inlet 61 is located on the lower side of the upper filter housing openings 663.

[0127] Furthermore, as a preferred embodiment of this utility model and not a limitation thereof, the shell ribs extend away from the lower filter shell, which can enhance the structural strength of the upper filter shell, improve its resistance to deformation, and ensure the shape stability of the filter cavity. The shell ribs help to prevent external objects from directly contacting the openings of the upper filter shell, reducing the risk of blockage. Multiple evenly distributed mesh-like openings of the upper filter shell are connected to the filter air inlet, so that the airflow can enter the filter cavity evenly and smoothly, avoiding the decrease in filtration efficiency or the increase in breathing resistance caused by local airflow concentration.

[0128] Example 11 Example 11, based on the above examples, also includes the following implementation method: like Figures 3 to 6 As shown, multiple support portions 63 extend radially from the filter outlet 62 toward the inner wall of the filter cavity 60, and a guide space 631 communicating with the filter outlet 62 is formed between two adjacent support portions 63.

[0129] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the radially distributed support structure can effectively guide the filtered airflow, so that the airflow flows evenly and directionally towards the filter outlet along the guide space, thereby improving the uniformity of airflow and the air outlet efficiency, and avoiding local airflow congestion or turbulence.

[0130] Specifically, the radially arranged support portion can provide multi-point uniform support for the filter element, preventing it from undergoing local deformation or displacement under air pressure. This ensures that the contact area between the filter element and the airflow is maximized. Combined with the uniform air intake of the mesh-shaped air inlet, it achieves uniform distribution and flow of airflow within the filter cavity, ensuring that all areas of the filter element fully participate in filtration, avoiding local filtration blind spots, and improving filtration efficiency and uniformity. Its structure is simple and easy to process, without increasing the manufacturing difficulty and cost of the filter housing.

[0131] In addition, the guide space formed between adjacent support parts constitutes an airflow channel, which guides the filtered clean air to gather in an orderly manner to the filter outlet, which can reduce airflow diffusion loss and improve airflow concentration and breathing comfort.

[0132] The above examples are merely illustrative of the technical content of this utility model to facilitate reader understanding, but do not imply that the implementation of this utility model is limited to these embodiments. Any technical extensions or re-creations made based on this utility model are protected by this utility model. The scope of protection of this utility model is defined by the claims.

Claims

1. A face mask air inlet device, comprising a housing (1), wherein the housing (1) is provided with a cavity (2), characterized in that: A filter housing (6) is connected to one side of the housing (1). The cavity (2) is provided with an air duct area (21) and a mounting cavity (22). The mounting cavity (22) includes a power component mounting area (221) and a control component mounting area (222). The air duct area (21) is provided with an air inlet area (211), an air outlet area (212) communicating with the air inlet area (211), an air duct component mounting area (213) provided in the air inlet area (211), and a drive located in the air duct component mounting area (213) and cooperating with the control component mounting area (222). The component (2140) includes a filter housing (6) comprising a filter cavity (60), a filter inlet (61) located on one side of the filter cavity (60), a filter outlet (62) located on one side of the filter cavity (60), a filter element (64) located between the filter inlet (61) and the filter outlet (62), and a support portion (63) near the filter outlet (62), the support portion (63) being used to lift the filter element (64) so ​​that a gap (65) is formed between the bottom of the filter element (64) and the support portion (63).

2. The face mask air inlet device according to claim 1, characterized in that: The air inlet area (211) is provided with an air inlet (40) near the side of the cavity (2), and the air outlet area (212) is provided with an air outlet (30) near the other side of the cavity (2). The central axis of the air inlet (40) and the central axis of the air outlet (30) are not on the same straight line, and the air inlet area (211) and the air outlet area (212) do not overlap or partially overlap.

3. The face mask air inlet device according to claim 2, characterized in that: The housing (1) is provided with a first housing (3) and a second housing (4) that enclose the cavity (2). The first housing (3) and the second housing (4) are detachably connected. The air inlet (40) is located in the second housing (4) and communicates with the cavity (2). The air outlet (30) is located in the first housing (3) and is located on the side away from the second housing (4). The central axis of the air inlet (40) does not coincide with the central axis of the second housing (4). The central axis of the air outlet (30) does not coincide with the central axis of the first housing (3).

4. The face mask air inlet device according to claim 3, characterized in that: The second housing (4) is provided with a buckle (41) connected to the component, a second housing mounting groove (42) for the buckle (41) to slide, an elastic element (43) located between the buckle (41) and the second housing mounting groove (42), and a second housing cover plate (44) connected to the upper side of the second housing mounting groove (42). The buckle (41) is provided with a sliding end (411) located in the second housing mounting groove (42) and a buckle end (412) connected to the sliding end (411). The buckle (41) is L-shaped. The second housing cover plate (44) is used to restrict the buckle (41) from moving up and down. The second housing cover plate (44) is provided with a second housing cover plate opening (441) for the buckle end (412) to extend out.

5. The face mask air inlet device according to claim 2, characterized in that: The air duct area (21) is provided with an air duct assembly (5), and the air duct assembly (5) is provided with a baffle (51) disposed between the air inlet area (211) and the air outlet area (212). The baffle (51) is disposed on the side close to the air inlet (40), and the baffle (51) extends from the cavity (2) toward the air inlet (40). The extension direction of the baffle (51) is parallel to the air inlet direction of the air inlet (40).

6. The face mask air inlet device according to claim 5, characterized in that: The cavity (2) is integrally formed, and the baffle (51) surrounds and forms a closed shape. The baffle (51) is arc-shaped. The area of ​​the air inlet area (211) is larger than the area of ​​the air outlet area (212). The baffle (51) includes a first baffle (511) located in the air inlet area (211) and a second baffle (512) connected to the first baffle (511) and located in the air outlet area (212). The first baffle (511) is arc-shaped and the second baffle (512) is arc-shaped.

7. The face mask air inlet device according to claim 6, characterized in that: The cavity (2) is provided with a locking end (23) near the air outlet (30). The extension height of the locking end (23) is less than the extension height of the baffle (51). The air outlet (30) is provided with a locking groove (301) for the mask to be inserted. The locking end (23) is V-shaped. The cavity (2) is provided with an extension (24) near the air outlet (30). The extension (24) and the second baffle (512) form a guide. The gap (25) is provided with a plurality of connecting ribs (241) and a connecting part (242) connected to the connecting ribs (241). The engaging end (23) is located between two of the connecting ribs (241). A hollow opening (2411) communicating with the air outlet (30) is provided between the plurality of connecting ribs (241), and / or the connecting part (242) is provided with a hollow opening (2411) communicating with the air outlet (30).

8. The face mask air inlet device according to claim 1, characterized in that: The filter element (64) includes a filter section, a first vent (641) located between the filter section and the support section (63), and a second vent (642) located between the filter inlet (61) and the filter section.

9. A face mask air inlet device according to claim 8, characterized in that: Multiple support portions (63) extend radially from the filter outlet (62) toward the inner wall of the filter cavity (60), and a guide space (631) communicating with the filter outlet (62) is formed between two adjacent support portions (63).

10. A face mask air inlet device according to any one of claims 1-9, characterized in that: The filter housing (6) is arc-shaped, the filter inlet (61) is larger than the filter outlet (62), the central axis of the filter outlet (62) does not coincide with the central axis of the filter housing (6), and the housing (1) and / or the filter housing (6) are elliptical, pebble-shaped, or teardrop-shaped.

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