A filtering device and a mask air inlet device

Abstract

The utility model relates to a face mask air intake auxiliary device technical field, concretely is a filter device and face mask air inlet device, including filter casing, filter casing includes filter cavity, the filter air inlet of one side of filter cavity, the filter air outlet of one side of filter cavity, the filter piece between filter air inlet and filter air outlet, the support part close to filter air outlet, support part is equipped with multiple and extends from filter air outlet to the inner wall direction of filter cavity, and support part is used for lifting filter piece to make the clearance between the bottom of filter piece and support part. The utility model discloses a plurality of support parts of extending from filter air outlet to the inner wall direction of filter cavity are arranged in filter casing, make filter piece be lifted and form the clearance with its bottom, effectively avoid the deformation of filter piece to filter air outlet direction collapse or close to air groove under the suction of fan.

Description

Technical Field

[0001] This utility model relates to the technical field of air intake auxiliary devices for face masks, specifically a filter device and 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, in the air intake auxiliary device for masks disclosed in Chinese patent document CN205948208U, the filter pad is replaceably installed between the air inlet cover and the face mask. The face mask has an air groove corresponding to the fan outlet, and the filter pad is located in the air groove. In this structure, the filter pad is close to the air groove and is easily squeezed and deformed towards the air groove under the suction of the fan. Part of the filter pad blocks the air groove outlet, 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 groove, causing the user to breathe in polluted air that has not been filtered.

[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 overall airflow smoothness and filtration efficiency of the air intake assist devices. Utility Model Content

[0005] Regarding the aforementioned technical problem that existing filter pads are close to the air duct and are easily squeezed and deformed towards the air duct under the suction of the fan, affecting airflow smoothness and filtration efficiency, the technical solution adopted by this utility model to solve this problem is: A filtration device includes a filter housing, the filter housing comprising a filter cavity, a filter inlet located on one side of the filter cavity, a filter outlet located on one side of the filter cavity, a filter element located between the filter inlet and the filter outlet, and a support portion near the filter outlet. The support portion is provided with multiple portions and extends from the filter outlet toward the inner wall of the filter cavity. 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 filter element includes a filter section and a first ventilated section located between the filter section and the support section.

[0007] Furthermore, in some embodiments of this utility model, the filter element includes a second ventilated portion located between the filter inlet and the filter section.

[0008] Furthermore, in some embodiments of this utility model, the filter housing includes an upper filter housing and a lower filter housing that surround and form the filter cavity. The upper filter housing is provided with an upper engaging groove, into which the outer edge of the lower filter housing extends and engages.

[0009] Furthermore, in some embodiments of this utility model, the upper filter housing is provided with housing ribs and upper filter housing openings. The housing ribs extend away from the lower filter housing. The upper filter housing openings are provided with a plurality of uniformly arranged mesh-like holes. The filter air inlet is located below the upper filter housing openings.

[0010] 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.

[0011] Furthermore, in some embodiments of this utility model, the filter housing is arc-shaped, the filter inlet is larger than the filter outlet, and the central axis of the filter outlet does not coincide with the central axis of the lower filter housing.

[0012] Furthermore, in some embodiments of this utility model, the lower filter housing is provided with a first engaging groove and a second engaging groove on its lower side for external components to engage and extend into. The lower filter housing is also provided with a first engaging groove and a second engaging groove for external components to engage and be limited in place.

[0013] Furthermore, in some embodiments of this utility model, the filter housing is elliptical, pebble-shaped, or teardrop-shaped, the first ventilated part is fixed to the support part, the second ventilated part is fixedly connected to the first ventilated part, and the second ventilated part and the first ventilated part surround and cover the filter part.

[0014] Another objective of this invention is to provide a face mask air intake device, including the filtration device described above.

[0015] The beneficial effects of this utility model are as follows: 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. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a filtration device according to the present invention.

[0017] Figure 2 for Figure 1 AA sectional view and enlarged partial view.

[0018] Figure 3 This is a schematic diagram of a filtration device according to the present invention from another perspective.

[0019] Figure 4 This is an exploded view of a filtration device according to the present invention.

[0020] Figure 5 This is a top view of the lower filter housing of this utility model.

[0021] Figure 6 This is a schematic diagram of a face mask air inlet device according to the present invention.

[0022] Figure 7 for Figure 6 BB cross-sectional view. Detailed Implementation

[0023] 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.

[0024] 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.

[0025] 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.

[0026] Example 1 like Figures 1 to 7 A filtration device is shown, including a filter housing 6. The filter housing 6 includes 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 has multiple portions and extends from the filter outlet 62 toward the inner wall of the filter cavity 60. 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.

[0027] 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.

[0028] 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.

[0029] Specifically, the filter element can be a filter pad, filter cotton, silica gel, activated carbon, or other materials.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] Example 2 Example 2, based on Example 1, also has the following implementation method: like Figure 4 The filter device shown includes a filter element 64 comprising a filter section and a first ventilated section 641 located between the filter section and the support section 63.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] Alternatively, in some embodiments, the filter element may be a material such as silica gel or activated carbon.

[0038] Example 3 Based on Example 2, Example 3 also has the following implementation method: like Figure 4 The filter device shown includes a filter element 64 comprising a second vent 642 located between the filter inlet 61 and the filter section.

[0039] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the provision of the second vent can initially buffer and evenly distribute the airflow entering the filter cavity, reduce the local high pressure generated when the airflow directly impacts the filter, thereby reducing the risk of deformation or displacement of the filter due to uneven airflow.

[0040] 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.

[0041] 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. Alternatively, the second vent can be directly covered on the upper side of the filter and can be replaced at any time.

[0042] Example 4 Based on Example 1, Example 4 also has the following implementation method: like Figure 2 The filter device shown 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] Example 5 Example 5, based on Example 4, also has the following implementation method: like Figure 1 and Figure 2The filter device shown has an upper filter housing 66 with housing ribs 662 and an upper filter housing opening 663. The housing ribs 662 extend away from the lower filter housing 67. The upper filter housing opening 663 has a plurality of mesh-like holes evenly arranged. The filter air inlet 61 is located below the upper filter housing opening 663.

[0047] 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.

[0048] Example 6 Example 6, based on Example 1, also has the following implementation method: like Figure 5 The filter device shown has a plurality of 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] Example 7 Example 7, based on Example 1, also has the following implementation method: like Figures 1 to 5 The filter device shown has an arc-shaped filter housing 6, a filter inlet 61 that is larger than the filter outlet 62, and the central axis of the filter outlet 62 does not coincide with the central axis of the lower filter housing 67.

[0053] 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.

[0054] 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.

[0055] Example 8 Example 8, based on Example 7, also has the following implementation method: like Figures 1 to 7 The filter device shown has a first engaging groove 671 and a second engaging groove 672 on the lower side of the lower filter housing 67 for external components to engage and extend into. The lower side of the lower filter housing 67 also has a first mating groove 673 and a second mating groove 674 for external components to engage and be limited in place.

[0056] Furthermore, as a preferred embodiment of this utility model and not a limitation, the multi-directional locking and limiting structure design enables the rapid and stable assembly of the filter device and external components, improves the connection reliability of the overall structure, prevents loosening or misalignment caused by vibration or external force, and thus ensures the stability of the filtration function and the safety of use.

[0057] Specifically, the first and second locking grooves provide axial or radial locking and fixing, ensuring a tight fit between external components and the filter housing; while the first and second mating grooves further enhance assembly positioning accuracy through limiting structures, preventing relative movement of components and improving assembly consistency. By adopting a modular design, the product assembly process is simplified, production costs are reduced, and later maintenance or component replacement is facilitated, enhancing the product's scalability and applicability.

[0058] Specifically, the first and second engagement slots can be connected and engaged with the housing 1 that increases negative pressure, the first engagement slot can be limited and fixed with the slot of the housing 1 where the power supply component is placed, and the second engagement slot can be limited and fixed with the slot of the housing 1 where the drive component, such as a fan, is placed.

[0059] Example 9 Example 9, based on Example 1, also has the following implementation method: like Figures 1 to 7 The filter device shown has a filter housing 6 that is elliptical, pebble-shaped, or teardrop-shaped.

[0060] 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.

[0061] Example 10 Example 10, based on Example 3, also has the following implementation method: like Figure 4 The filter device shown has a first ventilated part 641 fixed to the support part 63, and a second ventilated part 642 fixedly connected to the first ventilated part 641. The second ventilated part 642 and the first ventilated part 641 surround and cover the filter part.

[0062] 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.

[0063] 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.

[0064] Example 11 Example 11, based on the above examples, also has the following implementation method: like Figures 1 to 7 The air intake device for the mask shown includes the filtration device described above.

[0065] Specifically, by using this filtration device, the mask air intake device can achieve efficient filtration and smooth airflow, effectively preventing the filter from deforming or blocking the air outlet under the suction of the fan, and ensuring that the air enters the mask stably after being fully filtered.

[0066] Specifically, this face mask air intake device features a compact structure, smooth airflow transfer, excellent sealing, and low wind resistance, enhancing breathing comfort and protective reliability. Simultaneously, the filter device and other components of the face mask air intake device can be quickly assembled and securely connected, facilitating filter maintenance and replacement, and making it suitable for various protective face mask scenarios. This utility model's face mask air intake device, while ensuring efficient filtration, uniform airflow distribution, and low breathing resistance, also possesses excellent ergonomic adaptability and structural reliability, improving user wearing experience and overall protective performance.

[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 filtration device, comprising a filter housing (6), characterized in that: The filter housing (6) includes 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) is provided with multiple portions and extends from the filter outlet (62) toward the inner wall of the filter cavity (60). 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).

2. The filtration device according to claim 1, characterized in that: The filter element (64) includes a filter section and a first ventilated section (641) located between the filter section and the support section (63).

3. A filtration device according to claim 2, characterized in that: The filter element (64) includes a second vent (642) located between the filter inlet (61) and the filter section.

4. A filtration device according to claim 1, characterized in that: The filter housing (6) includes an upper filter housing (66) and a lower filter housing (67) that enclose 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.

5. A filtration device according to claim 4, characterized in that: 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 multiple mesh-like evenly arranged openings. The filter air inlet (61) is located below the upper filter housing openings (663).

6. A filtration device according to claim 1, 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).

7. A filtration device according to claim 4, characterized in that: The filter housing (6) is arc-shaped, the filter inlet (61) is larger than the filter outlet (62), and the central axis of the filter outlet (62) does not coincide with the central axis of the lower filter housing (67).

8. A filtration device according to claim 4, characterized in that: The lower filter housing (67) is provided with a first engagement groove (671) and a second engagement groove (672) for external components to engage and insert into each other. The lower filter housing (67) is also provided with a first mating groove (673) and a second mating groove (674) for external components to engage and be limited.

9. A filtration device according to claim 3, characterized in that: The filter housing (6) is elliptical, pebble-shaped, or teardrop-shaped. 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). The second ventilated part (642) and the first ventilated part (641) surround and cover the filter part.

10. A face mask air inlet device, characterized in that: Includes the filtration device according to any one of claims 1-9.

Images