A mask airway and air inlet device

Abstract

The utility model relates to a face mask air inlet auxiliary device technical field, concretely is a face mask air duct and air inlet device, including cavity, cavity is equipped with air inlet area, air outlet area, sets up the air duct subassembly between air inlet area and air outlet area, air inlet area is equipped with the air inlet of near cavity one side, air outlet area is equipped with the air outlet of near cavity other side, the central axis of air inlet and the central axis of air outlet are not in same straight line, and air inlet area and air outlet area do not overlap or partly overlap. The utility model discloses the cavity of the utility model adopts the air inlet area and air outlet area of integration, has reduced the complex assembly structure of traditional many components, through optimizing the internal structure layout of air duct, avoided the clean dead angle of traditional scheme because of air duct bending complex, component nesting, makes driving assembly, air duct subassembly and each area can be independently exposed, convenient to disassemble or flush, has improved the cleaning convenience and airing efficiency.

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 duct and 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 an air inlet connected to the ventilation slot of the isolation cover at the bottom side of the fan, and an air outlet on the upper surface of the fan. Both the ventilation slot and the air inlet are located on the side of the installation space. The airflow first passes through the air duct inside the fan from the air inlet, and is transferred to the air outlet by the bend in the path. The airflow then passes through the ventilation slot of the isolation cover and is transferred to the air inlet on the outer shell. This solution has the following problems: although the airflow stays for a relatively long time, when the air intake auxiliary device needs to be cleaned, the fan, the isolation cover and the outer shell need to be cleaned separately. Moreover, part of the air duct is located inside the fan, and it is impossible to effectively clean and dry in the narrow and bendy air duct space.

[0004] As the consumer market for air intake assist devices for face masks continues to expand and consumers' requirements for air intake assist devices increase, the industry urgently needs to improve existing air intake assist devices for face masks in order to enhance the user experience without affecting airflow transfer. Utility Model Content

[0005] Regarding the aforementioned technical problem of incomplete cleaning and drying when cleaning numerous parts of the intake auxiliary device, the technical solution adopted by this utility model is as follows: A face mask air duct includes a cavity, the cavity having an air inlet area, an air outlet area communicating with the air inlet area, and an air duct assembly disposed between the air inlet area and the air outlet area. The air inlet area has a driving assembly, and the air duct assembly is used to drive the airflow in the air inlet area to the air outlet area. The air inlet area has an air inlet near one side of the cavity, and the air outlet area has 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.

[0006] Furthermore, in some embodiments of this utility model, the air duct assembly is provided with baffles disposed in the air inlet area and the air outlet area. The baffles extend from the cavity toward the air inlet, and the extension direction of the baffles is parallel to the air inlet direction. The baffles are integrally formed.

[0007] Furthermore, in some embodiments of this utility model, the cavity is integrally formed, the baffles are enclosed to form a sealed shape, the baffles are arc-shaped, the area of ​​the air inlet area is larger than the area of ​​the air outlet area, the air inlet direction is parallel to the air outlet direction, and the airflow in the air inlet area is transferred to the air outlet area in a horizontal direction.

[0008] Furthermore, in some embodiments of this utility model, the baffle includes 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, wherein the first baffle is arc-shaped and the second baffle is arc-shaped.

[0009] Furthermore, in some embodiments of this utility model, the first baffle is provided with a first connecting section and a second connecting section connected to the first connecting section, the air inlet area includes an air guide area located in the first connecting section and a diffusion area located in the second connecting section, and the central axis of the drive component is located on the side close to the air guide area.

[0010] Furthermore, in some embodiments of this utility model, the second connecting segment includes a first changing segment connected to the first connecting segment and a second changing segment connected to the first changing segment, wherein the curvature of the first changing segment is less than that of the first connecting segment, and the curvature of the second changing segment is less than that of the first changing segment.

[0011] Furthermore, in some embodiments of this utility model, the second baffle includes a third connecting segment connected to the second changing segment and a fourth connecting segment connected to the third connecting segment and the first connecting segment. The curvature of the third connecting segment is less than that of the fourth connecting segment, and the fourth connecting segment forms a V-shaped angle with the first connecting segment.

[0012] 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, and the locking end is V-shaped.

[0013] Furthermore, in some embodiments of this utility model, the cavity is provided with an extension near the air outlet, the extension forming air guide gaps with the third connecting section and the fourth connecting section respectively, the extension being provided with a plurality of connecting ribs and a connecting portion connected to the connecting ribs, the engaging end being located between two of the connecting ribs, a hollow opening communicating with the air outlet being provided between the plurality of connecting ribs, and / or the connecting portion being provided with a hollow opening communicating with the air outlet.

[0014] Another objective of this invention is to provide an air intake device, including the mask air duct as described above.

[0015] The beneficial effects of this utility model are as follows: The cavity of this utility model adopts an integrated air inlet and air outlet area, which reduces the complex assembly structure of traditional multi-part components. By optimizing the internal structure layout of the air duct, it avoids the cleaning dead corners caused by the complex bending of the air duct and the nesting of components in the traditional solution. This allows the drive component, air duct component and each area to be independently exposed, easy to disassemble or wash, and improves the convenience of cleaning and drying efficiency. Attached Figure Description

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

[0017] Figure 2 This is a schematic diagram of the air duct of a mask according to this utility model from another angle.

[0018] Figure 3 This is a schematic diagram of the air duct of a mask according to this utility model from another angle.

[0019] Figure 4 This is a schematic diagram of another embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of another embodiment of the present invention. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] 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.

[0024] Example 1 like Figures 1 to 5 The mask air duct shown includes a cavity 2. The cavity 2 is provided with an air inlet area 211, an air outlet area 212 communicating with the air inlet area 211, and an air duct assembly 5 disposed between the air inlet area 211 and the air outlet area 212. The air duct assembly 5 is used to drive the airflow in the air inlet area 211 to the air outlet area 212. The air inlet area 211 is provided with an air inlet 40 near one 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] Example 2 Based on Example 1, Example 2 also has the following implementation method: like Figures 1 to 5 The mask air duct shown has an air duct assembly 5 with baffles 51 disposed in the air inlet area 211 and the air outlet area 212. The baffles 51 extend from the cavity 2 toward the air inlet 40, and the extension direction of the baffles 51 is parallel to the air inlet direction of the air inlet 40. The baffles 51 are integrally formed.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] Example 3 Based on Example 2, Example 3 also has the following implementation method: like Figures 1 to 5 The mask air duct 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 inlet area 211 is larger than the area of ​​the air outlet area 212. The air inlet direction of the air inlet 40 is parallel to the air outlet direction of the air outlet 30. The airflow in the air inlet area 211 is transferred to the air outlet area 212 in a horizontal direction.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] Example 4 Example 4, based on Example 2, also has the following implementation method: like Figures 1 to 5The mask air duct shown includes a first baffle 51 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.

[0040] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, both the first baffle and the second baffle are arc-shaped and integrally connected to form a continuous and smooth airflow channel, which can guide the airflow in the air inlet area to smoothly transition to the air outlet area along the arc-shaped path, reduce airflow turbulence and resistance, reduce air pressure loss inside the air duct, and ensure ventilation efficiency.

[0041] Specifically, the arc-shaped structure has no sharp edges or hidden corners, and the connection between the first and second baffles is smooth, making it difficult for dust and stains to adhere and accumulate. Cleaning can be done by direct rinsing and wiping, making it convenient and thorough. Furthermore, the arc-shaped baffles themselves have excellent rigidity, and the connection between the first and second baffles further strengthens the overall structural strength of the air duct assembly, resisting deformation or wear caused by long-term airflow impact and extending the product's service life.

[0042] Example 5 Example 5, based on Example 4, also has the following implementation method: like Figures 1 to 5 The mask air duct shown has 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] Example 6 Example 6, based on Example 5, also has the following implementation method: like Figures 1 to 5 The mask duct shown includes a second connecting segment 5112 comprising a first variable segment 51121 connected to the first connecting segment 5111 and a second variable segment 51122 connected to the first variable segment 51121. The curvature of the first variable segment 51121 is less than that of the first connecting segment 5111, and the curvature of the second variable segment 51122 is less than that of the first variable segment 51121.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] Example 7 Example 7, based on Example 6, also has the following implementation method: like Figures 1 to 5 The mask air duct shown includes a second baffle 512 comprising 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.

[0051] 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.

[0052] like Figures 1 to 5 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.

[0053] like Figures 1 to 5 As 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.

[0054] like Figures 1 to 5 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.

[0055] 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.

[0056] Example 8 Example 8, based on Example 7, also has the following implementation method: like Figures 1 to 5 The mask air duct 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.

[0057] 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.

[0058] 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.

[0059] Example 9 Based on Example 8, Example 9 also has the following implementation method: like Figures 1 to 3 The mask air duct shown has a cavity 2 with an extension 24 near the air outlet 30. The extension 24 forms air guide gaps 25 with the third connecting section 5121 and the fourth connecting section 5122 respectively. The extension 24 has 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 connecting ribs 241. The plurality of connecting ribs 241 are provided with a hollow opening 2411 communicating with the air outlet 30, and / or the connecting part 242 is provided with a hollow opening 2411 communicating with the air outlet 30.

[0060] Specifically, the extension section forms a guide gap with the third and fourth connecting sections, 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 being evenly diffused through the guide gap, the airflow is output through the outlet, further optimizing the airflow distribution, reducing eddies and pressure loss, and improving the uniformity and efficiency of the outlet.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] Example 10 Example 10, based on the above examples, also has the following implementation method: like Figures 1 to 5 The air intake device shown includes the mask air duct as described above.

[0065] Specifically, by adopting the above-described mask duct structure, this air intake device achieves efficient airflow guidance and stable delivery, while the duct interior has no complex bends or enclosed cavities, resulting in excellent cleanability and quick assembly / disassembly performance. The one-piece molded cavity, balanced force-bearing ribs, and connecting ribs give the air intake device excellent overall rigidity, strong resistance to deformation and impact, reducing the risk of damage during use and cleaning, and extending product lifespan.

[0066] The air intake device of this utility model has a simple overall structure, smooth air delivery, and convenient maintenance. It is suitable for application scenarios with high requirements for respiratory protection performance and cleanliness, and has good practicality and market application prospects.

[0067] 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 mask air duct, comprising a cavity (2), characterized in that: The cavity (2) includes an air inlet area (211), an air outlet area (212) connected to the air inlet area (211), and a duct assembly (5) disposed between the air inlet area (211) and the air outlet area (212). The air inlet area (211) is provided with a drive assembly (2140). The duct assembly (5) is used to drive the airflow in the air inlet area (211) to the air outlet area (212). The air inlet area (211) is provided with an air inlet (40) near one side of the cavity (2). 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.

2. The face mask air duct according to claim 1, characterized in that: The air duct assembly (5) is provided with a baffle (51) between the air inlet area (211) and the air outlet area (212). The baffle (51) is located on the side close to the air inlet (40). 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). The baffle (51) is integrally formed.

3. A mask air duct according to claim 2, characterized in that: The cavity (2) is integrally formed, 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 air inlet direction of the air inlet (40) is parallel to the air outlet direction of the air outlet (30), and the airflow in the air inlet area (211) is transferred to the air outlet area (212) in the horizontal direction.

4. A mask air duct according to claim 2, characterized in that: 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.

5. A mask air duct according to claim 4, characterized in that: 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 guide 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 guide area (21101).

6. A mask air duct according to claim 5, characterized in that: 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).

7. A mask air duct according to claim 6, characterized in that: The second retaining rib (512) includes a third connecting segment (5121) connected to the second changing 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).

8. A mask air duct according to claim 7, 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.

9. A mask air duct according to claim 8, characterized in that: The cavity (2) is provided with an extension (24) near the air outlet (30). The extension (24) forms an air guide gap (25) with the third connecting section (5121) and the fourth connecting section (5122) respectively. The extension (24) 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).

10. An air intake device, characterized in that: Includes the mask air duct as described in any one of claims 1-9.

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