Filter element air outlet end cover, air filter element and air filter

Abstract

The utility model provides a filter element air outlet end cover, an air filter element and an air filter. The filter element air outlet end cover comprises a connecting part, and the connecting part is used for covering the end face of a first filter module; and the air outlet component is surrounded by the connecting component, the air outlet component is used for being arranged at the air outlet end of the air outlet flow channel and located above the second filtering module, the air outlet component is provided with an air outlet, and the air outlet is used for communicating the end face of the second filtering module and the air outlet end of the air outlet flow channel. The restriction of the thickness of the second filtering module on the diameter of the air outlet can be avoided, that is, the diameter of the air outlet is only influenced by the thickness of the first filtering module, compared with a traditional design, the diameter of the air outlet is remarkably enlarged, the ventilation sectional area can be enlarged, the airflow speed can be reduced, and therefore aerodynamic noise is reduced, and operation noise can also be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air filtration and purification, and in particular to an air filter core air outlet end cover, an air filter core, and an air filter. BACKGROUND

[0002] The air filter core adopts a physical filtration and chemical adsorption dual purification mechanism, and includes a limiting end cover, a first filter module (generally a paper folding module), a second filter module (generally an activated carbon module), and an air outlet end cover. The structure adopts a hierarchical nested design: the air outlet end cover and the limiting end cover vertically clamp the first filter module and the second filter module, wherein the first filter module is arranged around the second filter module, and the second filter module is arranged in a vertical air outlet flow channel. The air purification process is as follows: after external air penetrates the first filter module and the second filter module horizontally, the air is discharged from the air outlet of the air outlet end cover through the air outlet flow channel.

[0003] However, in the current structure design, since the air outlet end cover needs to cover the end faces of the first filter module and the second filter module, the diameter of the air outlet is significantly reduced due to the superimposed thickness of the two. This design defect causes the following problems:

[0004] The narrow air outlet causes the air flow rate to abnormally increase, and the high-speed airflow generates significant aerodynamic noise, resulting in excessive operating noise and affecting user experience. CONTENT OF THE INVENTION

[0005] The air filter core air outlet end cover, the air filter core, and the air filter provided in the embodiments of the present application solve the problem of excessive operating noise in the related art, and the technical solutions are as follows:

[0006] In a first aspect, the embodiments of the present application provide an air filter core air outlet end cover, which includes

[0007] a connecting component for covering the end face of the first filter module; and

[0008] an air outlet component surrounded by the connecting component, the air outlet component being configured above the second filter module at the air outlet end of the air outlet flow channel, the air outlet component having an air outlet for communicating the end face of the second filter module and the air outlet end of the air outlet flow channel.

[0009] In an embodiment, the air outlet includes:

[0010] a main air outlet configured directly above the air outlet end of the air outlet flow channel, the main air outlet communicating the air outlet end of the air outlet flow channel; and

[0011] A plurality of auxiliary air outlets are arranged in sequence around the main air outlet, and the plurality of auxiliary air outlets are configured to be above the end face of the second filter module and communicate with the end face of the second filter module.

[0012] In an embodiment, the air outlet component is provided with a first annular portion and a second annular portion, the first annular portion has the main air outlet, the second annular portion is arranged around the first annular portion, the inner ring of the second annular portion is connected to the first annular portion, the outer ring of the second annular portion is connected to the connecting component, and the second annular portion has the auxiliary air outlet.

[0013] In an embodiment, the bottom wall of the first annular portion has a first connecting groove arranged around the vertical center line of the first annular portion, and the first connecting groove is used to cooperate with the end of the air outlet screen of the air filter cartridge to connect the first annular portion and the air outlet screen together.

[0014] In an embodiment, the second annular portion includes:

[0015] a connecting ring arranged around the first annular portion; and

[0016] a plurality of connecting blocks, each of which is arranged between the inner side wall of the connecting ring and the outer side wall of the first annular portion, the plurality of connecting blocks are arranged in sequence around the first annular portion, and the inner side wall of the connecting ring, the outer side wall of the first annular portion, and two adjacent connecting blocks form the auxiliary air outlet.

[0017] In an embodiment, the bottom wall of the connecting component has a second connecting groove arranged around the air outlet component.

[0018] The air outlet component is further provided with a third annular portion arranged around the second annular portion, a vertical first end of the third annular portion is connected to the second annular portion, and a vertical second end of the third annular portion is inserted into the second connecting groove to connect the air outlet component and the connecting component together.

[0019] In an embodiment, the second connecting groove is used to cooperate with the end of the first filter module to connect the air outlet component and the first filter module together.

[0020] In an embodiment, the number of air outlets is a plurality, the plurality of air outlets are arranged in sequence around the vertical center line of the air outlet end cover of the filter cartridge, and the plurality of air outlets communicate with the end face of the second filter module and the air outlet end of the air outlet flow channel.

[0021] In a second aspect, the embodiments of the present application provide an air filter cartridge, which includes:

[0022] A first filter module, an inner circumferential wall of the first filter module surrounding an air outlet flow channel;

[0023] A second filter module, the second filter module being arranged in the air outlet flow channel;

[0024] A limiting end cover; and

[0025] The filter core air outlet end cover and the limiting end cover vertically clamp the first filter module, and the second filter module is limited between the filter core air outlet end cover and the limiting end cover.

[0026] In a third aspect, an air filter is provided, comprising the filter core air outlet end cover.

[0027] The advantages or beneficial effects of the above technical solutions at least include:

[0028] The filter core air outlet end cover comprises a connecting component and an air outlet component. The connecting component independently covers the end face of the first filter module, thereby realizing the sealing of the end face of the first filter module. The structure limitation that the end face of the first filter module and the end face of the second filter module need to be covered in the traditional design is avoided. The air outlet component is supported by the connecting component and is only aligned with the air outlet end of the air outlet flow channel. The end face of the second filter module and the air outlet end of the air outlet flow channel are connected through the air outlet of the air outlet component. The restriction of the thickness of the second filter module on the diameter of the air outlet is avoided. That is, the diameter of the air outlet is only affected by the thickness of the first filter module. Compared with the traditional design, the diameter of the air outlet is significantly enlarged, the ventilation cross-sectional area is enlarged, the airflow speed is reduced, and the aerodynamic noise is reduced, that is, the operation noise can be reduced.

[0029] The above summary is intended to illustrate only and is not intended to be limiting in any way. Further aspects, implementations, and features of the present application will be apparent from the drawings and the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0030] In the drawings, like reference numerals refer to same or similar functionalities throughout the several views. The drawings are not necessarily to scale. It is to be understood that the drawings only depict several embodiments in accordance with the disclosure and should not be considered to be limiting.

[0031] Figure 1 FIG. 1 is a perspective view of a filter core air outlet end cover according to an embodiment of the present disclosure;

[0032] Figure 2The utility model discloses a filter core air outlet end cover is in the second perspective under the three-dimensional structure schematic diagram of the end view of the filter core air outlet end cover;

[0033] Figure 3 The utility model discloses a connecting part's three-dimensional structure schematic diagram;

[0034] Figure 4 The utility model discloses a air outlet part's three-dimensional structure schematic diagram;

[0035] Figure 5 The utility model discloses an air filter filter core's three-dimensional structure schematic diagram;

[0036] Figure 6 The utility model discloses an air filter filter core's sectional view.

[0037] Reference signs

[0038] 1, connecting part;11, second connecting groove;2, air outlet part;21, air outlet;211, main air outlet;212, auxiliary air outlet;22, first annular part;221, first connecting groove;23, second annular part;231, connecting ring;232, connecting block;24, third annular part;3, first filter module;31, air outlet flow channel;4, second filter module;5, limiting end cover;6, air outlet filter screen. DETAILED DESCRIPTION

[0039] Hereinafter, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0040] Reference Figures 1-4 , the first aspect, the utility model discloses a filter core air outlet end cover, comprising

[0041] Connecting part 1, connecting part 1 is used to cover the end face of first filter module 3, that is, connecting part 1 is connected with first filter module 3, simultaneously, connecting part 1 encloses the end face of first filter module 3;And

[0042] Air outlet part 2, air outlet part 2 is surrounded by connecting part 1, that is, connecting part 1 is arranged around air outlet part 2, air outlet part 2 is used to be configured in the air outlet end of air outlet flow channel 31 and be located above second filter module 4, air outlet part 2 has air outlet 21, and air outlet 21 is used to communicate the end face of second filter module 4, the air outlet end of air outlet flow channel 31.

[0043] The filter core air outlet end cover, comprising a connecting component 1 and an air outlet component 2, the connecting component 1 independently covers the end face of the first filter module 3, thereby realizing the end face of the first filter module 3 is closed, avoiding the structure limitation that the end face of the first filter module 3 and the end face of the second filter module 4 need to be covered in the traditional design, and the air outlet component 2 is supported by the connecting component 1, and only the air outlet end of the air outlet flow channel 31 is aligned, and the end face of the second filter module 4 and the air outlet end of the air outlet flow channel 31 are communicated through the air outlet 21 on the air outlet component 2, the restriction of the thickness of the second filter module 4 on the diameter of the air outlet 21 is avoided, that is, the diameter of the air outlet 21 is only affected by the thickness of the first filter module 3, compared with the traditional design, the diameter of the air outlet 21 is significantly enlarged, the ventilation cross-sectional area can be enlarged, and the airflow velocity is reduced, thereby reducing the aerodynamic noise, that is, the operation noise can be reduced.

[0044] Referring to Figures 1-4 In an embodiment, the air outlet 21 comprises:

[0045] A main air outlet 211, the main air outlet 211 is used for being arranged directly above the air outlet end of the air outlet flow channel 31, and the main air outlet 211 communicates the air outlet end of the air outlet flow channel 31; and

[0046] A plurality of auxiliary air outlets 212, the plurality of auxiliary air outlets 212 are sequentially arranged around the main air outlet 211, the plurality of auxiliary air outlets 212 are used for being arranged directly above the end face of the second filter module 4, and the plurality of auxiliary air outlets 212 all communicate the end face of the second filter module 4. The main air outlet 211 and the auxiliary air outlet 212 play a role in flow splitting and noise reduction, wherein the main air outlet 211 is directly aligned with the air outlet flow channel 31, ensuring that the main airflow passes through efficiently; the plurality of auxiliary air outlets 212 are aligned with the end face of the second filter module 4, and the plurality of auxiliary air outlets 212 are arranged around, forming an auxiliary air outlet channel, dispersing the airflow, reducing the overall airflow speed, and reducing the aerodynamic noise generated by the high-speed airflow; in addition, by arranging the auxiliary air outlet 212 directly above the second filter module 4, the airflow can be avoided to be concentrated, the purified air can be discharged more uniformly, the airflow stability can be improved, the turbulent flow and vortex noise can be reduced; in addition, by directly communicating the end face of the second filter module 4 through the auxiliary air outlet 212, the second filter module 4 can be fully ventilated, chemical adsorption residues can be reduced, and long-term purification performance can be improved.

[0047] Referring to Figures 1-4 In an embodiment, the air outlet component 2 is provided with a first annular part 22 and a second annular part 23, the first annular part 22 has the main air outlet 211, the second annular part 23 is arranged around the first annular part 22, the inner circle of the second annular part 23 is connected with the first annular part 22, the outer circle of the second annular part 23 is connected with the connecting component 1, and the second annular part 23 has the auxiliary air outlet 212. In this way, the inner circle of the second annular part 23 is connected with the first annular part 22, and the outer circle of the second annular part 23 is connected with the connecting component 1, forming a stable double-layer support structure and enhancing the overall strength.

[0048] participate Figures 1-4 In an embodiment, the bottom wall of the first annular part 22 has a first connecting groove 221, which is arranged around the vertical center line of the first annular part 22, and is used to cooperate with the end of the air outlet screen 6 of the air filter cartridge to connect the first annular part 22 and the air outlet screen 6 together. Wherein, the first connecting groove 221 is arranged around the center line of the first annular part 22, and tightly cooperates with the end of the air outlet screen 6 to ensure axial centering, avoid installation deviation, and improve structural stability; in addition, the first connecting groove 221 provides a clear positioning and clamping structure, which facilitates quick installation, reduces assembly complexity, and is suitable for mass production; in addition, the groove type connection design makes the first annular part 22 and the air outlet screen 6 tightly fit, reduces the risk of air leakage, ensures that all air passes through the air outlet screen 6 for filtration, and improves purification efficiency; in addition, by stably connecting the air outlet screen 6, it ensures that the airflow passes through the main air port 211 uniformly, reduces turbulence and vortex, and further suppresses aerodynamic noise.

[0049] In an embodiment, the second annular part 23 comprises:

[0050] a connecting ring 231 arranged around the first annular part 22; and

[0051] a plurality of connecting blocks 232, each of which is arranged between the inner side wall of the connecting ring 231 and the outer side wall of the first annular part 22, and is arranged in sequence around the first annular part 22, and the inner side wall of the connecting ring 231 and the outer side wall of the first annular part 22 between adjacent two connecting blocks 232 form a secondary air port 212. In this way, the connecting ring 231 and the plurality of connecting blocks 232 form a frame type support structure, which increases the overall strength of the second annular part 23, and at the same time ensures the stable connection of the first annular part 22 and the connecting part 1, avoiding deformation or loosening; in addition, the gap between the connecting blocks 232 naturally forms the secondary air port 212, and the airflow can be uniformly dispersed through it, reducing local high-speed airflow, reducing wind resistance and noise, and improving air outlet efficiency; in addition, by adjusting the number, size or spacing of the connecting blocks 232, the number and area of the secondary air ports 212 can be flexibly controlled, the airflow distribution can be optimized, and different filter cartridges or air volume requirements can be adapted.

[0052] Reference Figures 1-4 In an embodiment, the bottom wall of the connecting part 1 has a second connecting groove 11, which is arranged around the air outlet part 2;

[0053] The air outlet component 2 is also provided with a third annular part 24, which is arranged around the second annular part 23, the vertical first end of the third annular part 24 is connected to the second annular part 23, and the vertical second end of the third annular part 24 is inserted into the second connecting groove 11 to connect the air outlet component 2 and the connecting component 1 together. Among them, the third annular part 24 is inserted into the second connecting groove 11 to form a tight fit, which ensures that the air outlet component 2 and the connecting component 1 are firmly combined to avoid loosening or misalignment, and improves the structural stability; secondly, the slot insertion connection design (second connecting groove 11 + third annular part 24) effectively seals the joint gap, reduces air leakage, ensures that all air is filtered through the first filter module 3 and the second filter module 4, and improves the purification efficiency; in addition, the annular nested structure design is clear, which is convenient for quick positioning and installation, reduces the assembly complexity, and is convenient for disassembly, maintenance or replacement of parts.

[0054] In an embodiment, the second connecting groove 11 is also used to cooperate with the end of the first filter module 3 to connect the air outlet component 2 and the first filter module 3 together. That is, the second connecting groove 11 is used to fix the air outlet component 2 and the first filter module 3 at the same time, which reduces the additional connection structure, makes the overall design more simple, and has higher space utilization; in addition, the same second connecting groove 11 is used to realize the double locking of the air outlet component 2 and the first filter module 3, which avoids the loosening or displacement of the components and ensures the structural reliability during long-term use; in addition, the single second connecting groove 11 design reduces the assembly steps, reduces the complexity of manual operation, is convenient for quick assembly on the production line, and improves the manufacturing efficiency; in addition, the tight slot fit design ensures seamless connection between the first filter module 3 and the air outlet component 2, reduces air leakage, and guarantees the filtering efficiency.

[0055] In an embodiment, the number of air outlets 21 is multiple, and the multiple air outlets 21 are arranged in sequence around the vertical center line of the filter core air outlet end cover. The multiple air outlets 21 are all connected to the end face of the second filter module 4 and the air outlet end of the air outlet flow channel 31. In this way, the multiple air outlets 21 are arranged around the vertical center line of the filter core air outlet end cover, which makes the airflow distribution more uniform, avoids single-point high-speed air outlet, effectively reduces the wind resistance and airflow noise, and improves the quietness effect; secondly, the multiple air outlets 21 are directly connected to the end face of the second filter module 4, which ensures that the activated carbon and other chemical filter materials in the second filter module 4 fully participate in air purification, reduces dead angles, and improves the overall filtering efficiency; in addition, the circular layout balances the airflow pressure, reduces the vibration or deformation caused by uneven stress of the filter core, and prolongs the service life of the filter core; in addition, the multiple air outlets 21 design adapts to different air volume requirements, realizes larger ventilation area in limited space, and avoids the size limitation problem of traditional single air outlet 21.

[0056] In an embodiment, the connecting component 1 and the air outlet component 2 are integrally formed to form an integrated filter core air outlet end cover, eliminating the connecting structure between the connecting component 1 and the air outlet component 2, which can improve the structural strength of the filter core air outlet end cover and simplify the installation steps.

[0057] Referring to Figures 5-6 , in a second aspect, the utility model provides a kind of air filter filter core, comprising:

[0058] First filter module 3, the inner circumferential wall of first filter module 3 is surrounded and forms air outlet flow channel 31;

[0059] Second filter module 4, second filter module 4 is arranged in air outlet flow channel 31;

[0060] Limiting end cover 5;And

[0061] The filter core air outlet end cover described above, filter core air outlet end cover and limiting end cover 5 vertically hold first filter module 3, and second filter module 4 is limited between filter core air outlet end cover and limiting end cover 5.

[0062] The air filter filter core of the utility model, since the filter core air outlet end cover described above is used, the end surface of first filter module 3 can be independently covered by connecting component 1, so that the end surface of first filter module 3 is closed, and the structural restriction that the end surface of first filter module 3 and the end surface of second filter module 4 need to be covered in traditional design is avoided, and air outlet component 2 is supported by connecting component 1, is only aligned with the air outlet end of air outlet flow channel 31, and the end surface of second filter module 4, the air outlet end of air outlet flow channel 31 are communicated through the air outlet of air outlet component 2 21, the restriction of the thickness of second filter module 4 on the diameter of air outlet 21 is avoided, that is, the diameter of air outlet 21 is only affected by the thickness of first filter module 3, compared with traditional design, the diameter of air outlet 21 is significantly enlarged, the ventilation cross-sectional area can be enlarged, the airflow velocity is reduced, so that the aerodynamic noise is reduced, that is, the operating noise can be reduced.

[0063] In an embodiment, first filter module 3 is a paper folding module, and second filter module 4 is an activated carbon module, so that the paper folding module efficiently removes large particle pollutants (such as PM2.5, dust) by physical interception, reduces the physical blockage of the activated carbon module, thereby delaying the saturation of the activated carbon, and improving the use efficiency of the activated carbon module, and the activated carbon module removes gaseous pollutants such as formaldehyde and odor by chemical adsorption, achieving comprehensive purification.

[0064] Referring to Figures 5-6 In an embodiment, second filter module 4 is arranged around the vertical center line of the air filter filter core.

[0065] Referring to Figures 5-6The air filter element further comprises an air outlet filter screen 6 vertically clamped between the air outlet component 2 and the limiting end cover 5, the air outlet filter screen 6 is inserted into the central hole of the second filter module 4, the air outlet filter screen 6 has a plurality of air outlet screen holes, and the plurality of air outlet screen holes are communicated between the second filter module 4 and the air outlet flow channel 31. In this way, the air outlet filter screen 6 serves as the last barrier to intercept filter material particles that may fall off the second filter module 4, ensuring the cleanliness of the air outlet; in addition, the plurality of air outlet screen holes are designed to disperse the airflow for discharge, reduce high-speed turbulent flow, effectively suppress wind noise, and improve the performance of silence.

[0066] In other embodiments, the second filter module 4 can also include a plurality of filter frames, each filter frame being used to carry filter material, and the plurality of filter frames are arranged in sequence along the vertical direction of the air filter element to improve the vertical space utilization rate of the air outlet flow channel 31, and at the same time, the filter material is changed from two-dimensional distribution to three-dimensional distribution, which can increase the amount of filter material of the second filter module 4, thereby improving the purification efficiency of the second filter module 4.

[0067] Among them, it can be understood that the filter material can be activated carbon, or porous ceramic, zeolite, photocatalyst, electrocatalyst, transition metal and its oxide, etc.

[0068] In a third aspect, the utility model provides a kind of air filter, comprising the filter core air outlet end cover described above.

[0069] The air filter of the utility model, since the filter core air outlet end cover described above is used, can also use the connecting component 1 to independently cover the end face of the first filter module 3, so as to realize the closure of the end face of the first filter module 3, avoid the structural restriction that the end face of the first filter module 3 and the end face of the second filter module 4 need to be covered in the traditional design, and the air outlet component 2 is supported by the connecting component 1, is only aligned with the air outlet end of the air outlet flow channel 31, and the end face of the second filter module 4 and the air outlet end of the air outlet flow channel 31 are communicated through the air outlet of the air outlet component 2 21, which avoids the restriction of the thickness of the second filter module 4 on the diameter of the air outlet 21, i.e. the diameter of the air outlet 21 is only affected by the thickness of the first filter module 3, which significantly expands the diameter of the air outlet 21 compared with the traditional design, can expand the ventilation cross-sectional area, reduce the airflow velocity, thereby reducing the aerodynamic noise, i.e. can reduce the operating noise.

[0070] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. Also, the specific features, structures, materials or characteristics described can be combined in an appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0071] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0072] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of various changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A filter cartridge air-out end cap characterized by, The connecting part is used for covering the end face of the first filter module; and The air outlet part is surrounded by the connecting part, and is used for being arranged at the air outlet end of the air outlet flow channel and above the second filter module. The air outlet part has air outlets for communicating with the end face of the second filter module and the air outlet end of the air outlet flow channel. The air outlets comprise:

2. The filter cartridge air-out end cap of claim 1, wherein, A main air outlet for being arranged immediately above the air outlet end of the air outlet flow channel, and communicating with the air outlet end of the air outlet flow channel; and A plurality of auxiliary air outlets arranged in sequence around the main air outlet, and used for being arranged immediately above the end face of the second filter module. The plurality of auxiliary air outlets all communicate with the end face of the second filter module. The air outlet part is provided with a first annular part and a second annular part. The first annular part has the main air outlet. The second annular part is arranged around the first annular part. The inner circle of the second annular part is connected to the first annular part. The outer circle of the second annular part is connected to the connecting part. The second annular part has the auxiliary air outlets.

3. The filter cartridge air-out end cap of claim 2, wherein, The bottom wall of the first annular part has a first connecting groove arranged around the vertical center line of the first annular part. The first connecting groove is used for cooperating with the end of the air outlet screen of the air filter cartridge, so as to connect the first annular part and the air outlet screen together.

4. The filter cartridge air-out end cap of claim 3, wherein, The second annular part comprises:

5. The filter cartridge air-out end cap of claim 3, wherein, A connecting ring arranged around the first annular part; and A plurality of connecting blocks. Each of the connecting blocks is arranged between the inner side wall of the connecting ring and the outer side wall of the first annular part. The plurality of connecting blocks are arranged in sequence around the first annular part. The inner side wall of the connecting ring, the outer side wall of the first annular part and two adjacent connecting blocks enclose the auxiliary air outlet. The bottom wall of the connecting part has a second connecting groove arranged around the air outlet part.

6. The filter cartridge air-out end cap of claim 3, wherein, The air outlet part is further provided with a third annular part arranged around the second annular part. The vertical first end of the third annular part is connected to the second annular part. The vertical second end of the third annular part is inserted into the second connecting groove, so as to connect the air outlet part and the connecting part together. The second connecting groove is also used for cooperating with the end of the first filter module, so as to connect the air outlet part and the first filter module together.

7. The filter cartridge air-out end cap of claim 6, wherein, The number of the air outlets is a plurality. The plurality of air outlets are arranged in sequence around the vertical center line of the filter cartridge air outlet end cover. The plurality of air outlets all communicate with the end face of the second filter module and the air outlet end of the air outlet flow channel.

8. The filter cartridge air-out end cap of claim 1, wherein, The filter cartridge air outlet end cover comprises:

9. An air filter cartridge, characterized by, A first filter module. The inner peripheral wall of the first filter module encloses an air outlet flow channel. A second filter module arranged in the air outlet flow channel. A limiting end cover; and The filter cartridge air outlet end cover and the limiting end cover vertically clamp the first filter module. The second filter module is limited between the filter cartridge air outlet end cover and the limiting end cover. The filter cartridge air outlet end cover comprises any one of claims 1-8. ​ 10. An air filter, characterized by, ​

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