Air inlet filtering module of oxygen generator and oxygen generator

Abstract

The utility model discloses an oxygen generator and an intake air filter module thereof, comprising: a filter chamber detachably arranged inside the oxygen generator; the avoiding groove is concavely arranged along the cavity wall of the filtering cavity and is used for avoiding an air inlet pipe head communicated with a compressor; the air inlet pipe head extends into the receding groove, an air outlet hole matched with the air inlet pipe head is formed in the groove wall of the receding groove in a penetrating mode, and one end of the air inlet pipe head is installed at the air outlet hole in a connected mode. And the avoiding groove is formed, so that the air inlet pipe head extends into the avoiding groove, the structural arrangement of the filter cavity and the air inlet pipe head is compact, and the occupied space is reduced. The filter cavity is positioned in the oxygen generator, so that integral arrangement is realized, and the increase of the occupied space of the oxygen generator is avoided; the filter cavity is detachably arranged, so that when the filter part needs to be replaced, the filter cavity can be directly replaced, the efficiency of replacement operation is improved, and it is guaranteed that the filter part is installed in place.

Description

Technical Field

[0001] The utility model belongs to the technical field of oxygen generators, and particularly relates to an air intake filtering module of an oxygen generator and an oxygen generator with the air intake filtering module. Background Art

[0002] An oxygen generator is a device that can extract oxygen from the air. It is mainly applied in the medical field to provide high-purity oxygen for patients in need of additional oxygen supply. Molecular sieve oxygen generators are currently commonly used, and two molecular sieves respectively perform the same cyclic process to achieve continuous air supply. The working process is as follows: Raw air is pressurized by a compressor, and then the processed compressed air enters the molecular sieve through an intake valve. Nitrogen, carbon dioxide, etc. are adsorbed in the molecular sieve, and the gas flowing out is high-purity oxygen.

[0003] In Patent CN201120181106.8, a split-type oxygen generator air intake filter and an oxygen generator are disclosed. The filter includes an upper housing and a lower housing. The upper housing and the lower housing are installed together to form a filtering cavity. A filtering device is arranged in the filtering cavity. An air pipe port for connecting an air pipe is arranged on the outer wall of the lower housing, and an air intake is arranged above the upper housing. An air outlet pipe is arranged below the filtering device, and the air outlet pipe is used to connect the air pipe port on the outer wall of the lower housing to supply air to the oxygen generator. The oxygen generator air intake filter is externally installed on the oxygen generator, which is convenient for disassembly and has low explosion noise.

[0004] In the above patent, the oxygen generator air intake filter is external, which will increase the overall volume of the oxygen generator and is not conducive to the compactness of the structure. And the grille structure at the air intake is on the appearance surface, which is not conducive to the optimization and improvement of the appearance quality.

[0005] The above information disclosed in this background art is only used to increase the understanding of the background art of this application. Therefore, it may include prior art that is not known to those of ordinary skill in the art. Summary of the Invention

[0006] In view of the above problems in the prior art, the utility model provides an air intake filtering module of an oxygen generator. By setting an avoidance groove, the air inlet pipe head extends into the installation groove, which is beneficial to the compact structure setting and reduces the occupied space.

[0007] To achieve the above utility model purpose, the utility model adopts the following technical solutions:

[0008] An air intake filtering module of an oxygen generator, comprising:

[0009] A filtering cavity, which is detachably arranged inside the oxygen generator;

[0010] A relief groove is recessed along the cavity wall of the filtering cavity and is used to avoid the intake pipe head communicated with the compressor.

[0011] The intake pipe head extends into the relief groove, and an air outlet hole matching the intake pipe head is penetrated through the groove wall of the relief groove, and one end of the intake pipe head is connected and installed at the air outlet hole.

[0012] In some embodiments of the present application, the air outlet hole is oppositely arranged with respect to the intake end of the filtering cavity, and an air outlet nozzle extending into the relief groove is arranged along the air outlet hole, and the air outlet nozzle is hermetically connected with the intake pipe head.

[0013] In some embodiments of the present application, the intake pipe head has a pipe head portion and a joint portion bent and extending along the upper end of the pipe head portion, and the joint portion is hermetically arranged with the air outlet nozzle.

[0014] In some embodiments of the present application, the joint portion is located inside the air outlet nozzle, and a circumferential sealing groove is arranged outside the joint portion, and a sealing ring is located at the sealing groove.

[0015] In some embodiments of the present application, the filtering cavity has a first cavity wall oppositely arranged with respect to the intake end and a second cavity wall connected with the first cavity wall, and the intake pipe head extends into the relief groove from the direction of the second cavity wall; the relief groove is opened on the first cavity wall and the second cavity wall.

[0016] In some embodiments of the present application, it further includes a second filter element arranged at the intake end of the filtering cavity, a support and limit portion abutted against the inner side of the second filter element is arranged inside the filtering cavity, and the support and limit portion is connected with the relief groove.

[0017] In some embodiments of the present application, the support and limit portion is a plurality of spaced support columns extending towards the intake end along the relief groove, and the second filter element has a plurality of turning portions that can extend into the gaps between adjacent two of the support columns.

[0018] In some embodiments of the present application, the second filter element is a folded filter paper structure.

[0019] In some embodiments of the present application, the filtering cavity has a cavity body and a filter frame surrounding the outside of the second filter element, the filter frame is detachably arranged on the cavity body, and the edge of the filter frame is bent to be provided with an outer baffle for limiting the second filter element.

[0020] In some embodiments of the present application, the filtering cavity has a first cavity wall oppositely arranged with respect to the intake end, and the relief groove has a first groove wall provided with an air outlet hole, a second groove wall and a third groove wall that are parallel and located between the first groove wall and the first cavity wall.

[0021] In some embodiments of the present application, a main air inlet area located between the first groove wall and the air inlet end, and a second air inlet area and a third air inlet area located on both sides of the main air inlet area are provided in the filtering cavity.

[0022] In some embodiments of the present application, it further includes a first filter element provided outside the second filter element. An air inlet groove is provided on the housing, and the first filter element is located in the air inlet groove; an inwardly concave installation cavity for installing the filtering cavity is provided on the groove wall of the air inlet groove.

[0023] In some embodiments of the present application, it further includes an air inlet cover covering the open end of the air inlet groove. A first air inlet for introducing external air is formed between the air inlet cover and the groove wall of the air inlet groove.

[0024] Based on the above-mentioned air inlet filtering module of an oxygen generator, the present application further provides an oxygen generator having the above-mentioned air inlet filtering module. By providing an avoidance groove, the air inlet pipe head extends into the installation groove, which is beneficial to the compact structure setting and reduces the occupied space.

[0025] An oxygen generator having the above-mentioned air inlet filtering module.

[0026] Compared with the prior art, the advantages and positive effects of the present utility model are as follows: By providing an avoidance groove, the air inlet pipe head extends into the avoidance groove, which is beneficial to the compact structure setting of the filtering cavity and the air inlet pipe head and reduces the occupied space. The filtering cavity is arranged inside the oxygen generator to achieve an integrated setting, avoiding an increase in the occupied space of the oxygen generator; the detachable setting of the filtering cavity enables direct replacement of the filtering cavity when the filter element needs to be replaced, which is beneficial to improving the replacement operation efficiency and ensuring the proper installation of the filter element.

[0027] After reading the specific embodiments of the present utility model in conjunction with the drawings, other features and advantages of the present utility model will become clearer. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 It is a schematic structural diagram of an embodiment of an air inlet filtering module of an oxygen generator proposed by the present utility model;

[0030] Figure 2 For Figure 1Schematic structural diagram of the middle air intake cover in the disassembled state;

[0031] Figure 3 is Figure 2 Enlarged structural diagram of the middle air intake groove;

[0032] Figure 4 is Figure 3 Schematic structural diagram of the middle after the filter cavity is disassembled;

[0033] Figure 5 is Figure 1 A sectional structural diagram of;

[0034] Figure 6 is Figure 5 Enlarged diagram of area A in the middle;

[0035] Figure 7 Schematic structural diagram of the filter cavity;

[0036] Figure 8 is Figure 7 Schematic structural diagram from another angle;

[0037] Figure 9 is Figure 7 Explosion structural diagram of;

[0038] Figure 10 Schematic structural diagram of the filter cavity and the air inlet pipe head in the installed state;

[0039] Figure 11 A sectional structural diagram of 10;

[0040] Figure 12 Schematic structural diagram of the air inlet pipe head;

[0041] Among them, the oxygen generator 100;

[0042] The housing 10;

[0043] The air intake groove 15; the first filter element 156;

[0044] The air intake cover 16; the first air inlet 161;

[0045] The filter cavity 17; the cavity 170; the first cavity wall 171; the second cavity wall 172; the second air inlet 173; the guide rib 174; the avoidance groove 175; the first groove wall 1751; the air outlet hole 17511; the air outlet nozzle 17512; the second groove wall 1752; the third groove wall 1753; the support and limit part 176; the support column 1761; the second filter element 177; the turning part 1771; the filter frame 178; the outer edge 1781;

[0046] The installation cavity 18;

[0047] Intake pipe head 36; pipe head part 361; connection part 362; sealing groove 3621. Specific implementation mode

[0048] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

[0049] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the positional relationship shown in the accompanying drawings. The direction towards the center of the component is "inner", and vice versa is "outer". The terms are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined.

[0050] In the present utility model, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0051] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above" and "on the top" of the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below" and "under the bottom" of the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0052] The following disclosure provides many different embodiments or examples for implementing different structures of the present utility model. To simplify the disclosure of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present utility model. In addition, the present utility model may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present utility model provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0053] Refer to Figures 1-12 , which is an embodiment of an air intake filtering module of an oxygen generator proposed by the present utility model. An air intake filtering module of an oxygen generator 100 includes: a filtering chamber 17, and a second filtering element 177 is arranged in the filtering chamber 17; in order to quickly replace the second filtering element 177, the filtering chamber 17 is detachably arranged inside the oxygen generator 100, and the entire filtering chamber 17 can be disassembled and replaced, improving the efficiency of the replacement operation. The gas filtered by the filtering module is supplied to the compressor. One end of the intake pipe head 36 is connected to the filtering chamber 17 and the other end is communicated with the intake port of the compressor.

[0054] In this embodiment, a relief groove 175 is formed by the concave inner wall 172 of the filtering chamber 17. The relief groove 175 is used to avoid the intake pipe head 36, and the intake pipe head 36 extends into the relief groove 175; this is beneficial to the compact structure setting and reduces the occupied space. An air outlet hole 17511 matching the intake pipe head 36 is penetrated through the groove wall of the relief groove 175, and one end of the intake pipe head 36 is connected and installed at the air outlet hole 17511. By providing the relief groove 175, the intake pipe head 36 extends into the relief groove 175, which is beneficial to the compact structure setting of the filtering chamber 17 and the intake pipe head 36 and reduces the occupied space. The filtering chamber 17 is arranged inside the oxygen generator 100 to achieve an integrated setting, avoiding an increase in the space occupied by the oxygen generator 100; the detachable setting of the filtering chamber 17 allows for the direct replacement of the filtering chamber 17 when the second filtering element needs to be replaced, which is beneficial to improving the efficiency of the replacement operation and ensuring the proper installation of the second filtering element 177.

[0055] In some embodiments of the present application, refer to Figures 6-9As shown, the air outlet hole 17511 is disposed opposite to the air inlet end of the filter chamber 17. The air inlet end of the filter chamber 17 is surrounded to form a second air inlet 173, that is, the air outlet hole 17511 and the second air inlet 173 are disposed opposite to each other. The air flow direction entering from the second air inlet 173 is consistent with the axial direction of the air outlet hole 17511; this is conducive to the air flow in the filter chamber 17 reaching the air outlet hole 17511 quickly and efficiently. For the convenience of installation of the air inlet pipe head 36 and the air outlet hole 17511, an air outlet nozzle 17512 extending into the avoidance groove 175 is provided along the air outlet hole 17511, or an air outlet nozzle 17512 extending away from the air inlet end of the filter chamber 17 is provided along the air outlet hole 17511. The air outlet nozzle 17512 is hermetically connected to the air inlet pipe head 36. By providing the air outlet nozzle 17512, the contact area between the air inlet pipe head 36 and the filter chamber 17 is increased, and the axial contact dimension of the air outlet hole 17511 is increased, which is conducive to increasing the sealing performance of the connection between the air inlet pipe head 36 and the air outlet nozzle 17512 and the fixing stability.

[0056] In some embodiments of the present application, refer to Figure 12 As shown, the air inlet pipe head 36 has a pipe head portion 361 and a connection head portion 362 bent and extended from the upper end of the pipe head portion 361. The connection head portion 362 is hermetically disposed with the air outlet nozzle 17512. The connection head portion 362 is located inside the air outlet nozzle 17512. A circumferential sealing groove 3621 is provided outside the connection head portion 362, and the sealing ring is located at the sealing groove 3621 to achieve the seal between the connection head portion 362 and the air outlet nozzle 17512.

[0057] In some embodiments of the present application, refer to Figure 8 As shown, the filter chamber 17 has a first chamber wall 171 disposed opposite to the air inlet end and a second chamber wall 172 connected to the first chamber wall 171. The air inlet pipe head 36 extends into the avoidance groove 175 from the direction of the second chamber wall 172. The avoidance groove 175 is opened on the first chamber wall 171 and the second chamber wall 172. In this embodiment, a first air inlet 161 is provided on the rear wall of the outer shell 10. The air inlet end of the filter chamber 17 is located at the rear end of the filter chamber 17. The first chamber wall 171 is the front chamber wall of the filter chamber 17, and the second chamber wall 172 is the bottom chamber wall. The air inlet pipe head 36 extends into the filter chamber 17 from the bottom upwards.

[0058] In some embodiments of the present application, refer to Figure 9 As shown, the air inlet filtering module further includes a second filter element 177 provided at the air inlet end of the filter chamber 17. A support and limiting portion 176 is provided inside the filter chamber 17 and abuts against the inner side of the second filter element 177. The support and limiting portion 176 is connected to the avoidance groove 175. The support and limiting portion 176 is extended along the avoidance groove 175 towards the second filter element 177. The second filter element 177 is provided for filtering the gas flowing into the filter chamber 17, and the support and limiting portion 176 is provided for realizing the inner side limit of the second filter element 177.

[0059] In some embodiments of the present application, the supporting and limiting portion 176 is a plurality of spaced support columns 1761 extending along the avoidance groove 175 towards the intake end. The plurality of support columns 1761 are arranged in parallel in the up and down direction, and one or more supporting and limiting portions 176 can be provided. The second filter element 177 is a folded filter paper structure, and the second filter element 177 has a plurality of turning portions 1771 that can extend into the gaps between adjacent two support columns 1761; realizing the limitation of the second filter element 177 in the inner and outer directions and the uniform distribution in the up and down direction.

[0060] In some embodiments of the present application, the second filter element 177 is located outside the air outlet hole 17511, and there is a space between the second filter element 177 and the air outlet hole 17511; the avoidance groove 175 has a first groove wall 1751 provided with the air outlet hole 17511. The first groove wall 1751 is arranged in parallel with the second filter element 177, and there is a space between the second filter element 177 and the first groove wall 1751. The second filter element 177 and the first groove wall 1751 enclose a gas supply cavity. In the filtering cavity 17, the gas filtered by the second filter element 177 enters the gas supply cavity, and the gas in the gas supply cavity can form a stable air flow and then be supplied to the air outlet hole 17511; it is beneficial to provide the gas to the intake pipe head 36 with stable pressure and gentle flow, which is beneficial to the operation of the compressor. In some embodiments of the present application, the filtering cavity 17 has a cavity 170 and a filter frame 178 surrounding the outside of the second filter element 176. The filter frame 178 is detachably arranged on the cavity 170. After the filtering cavity 17 is disassembled, the second filter element 177 can be replaced by disassembling the filter frame 178. The edge of the filter frame 177 is provided with an outer retaining edge 1781 for limiting the second filter element 177. The outer retaining edge 1781 encloses a second intake port 173.

[0061] In some embodiments of the present application, the filtering cavity 17 has a first cavity wall 171 opposite to the intake end. The avoidance groove 175 has a first groove wall 1751 provided with the air outlet hole 17511, a second groove wall 1752 and a third groove wall 1753 located between the first groove wall 1751 and the first cavity wall 171. The second groove wall 1752 and the third groove wall 1753 are arranged in parallel, and the second groove wall 1752 and the third groove wall 1753 are respectively connected to the left and right sides of the first groove wall 1751.

[0062] In some embodiments of the present application, the area inside the filtering cavity 17 is a concave structure. Inside the filtering cavity 17, there is a main intake area between the first groove wall 1751 and the intake end, and a second intake area and a third intake area on both sides of the main intake area. The gas in the second intake area and the third intake area enters the main intake area through the gaps between adjacent two support columns 1761 on the supporting and limiting portion 176.

[0063] In some embodiments of the present application, the intake air filtration module further includes a first filter element 156 disposed outside the second filter element 177, and the first filter element 156 is located in the intake air groove 15. An intake air groove 15 is provided on the housing 10, and an installation cavity 18 for installing the filter cavity 17 is formed on the groove wall of the intake air groove 15. The installation cavity 18 extends along the groove wall of the intake air groove 15 in a direction away from the open end of the intake air groove 15. The installation cavity 18 is arranged to match the filter cavity 17, and the filter cavity 17 is detachably located in the installation cavity 18.

[0064] In some embodiments of the present application, referring to Figure 2 as shown, the intake air filtration module further includes an intake air cover 16 covering the open end of the intake air groove 15. A first intake air port 161 for introducing outside air is formed between the intake air cover 16 and the groove wall of the intake air groove 15. By providing the intake air groove 15 and the intake air cover 16, a hidden intake air port structure is formed, which is beneficial to improving the appearance quality of the oxygen generator; and the intake air port structure is directly arranged inside the housing 10, which is beneficial to the compact structure setting, reducing the space occupation and improving the market competitiveness. A first filter element 156 is provided in the intake air cavity 150 to filter the outside inflowing air and reduce the entry of impurities such as dust carried in the air into the housing, ensuring the cleanliness of the air flow entering the housing 10. The outside air enters the intake air groove 15 through the first intake air port 161. The first intake air port 161 is arranged near the groove wall, so that the air flow turns and flows in the direction of the first intake air port 173 after entering the intake air groove 15, which is beneficial to increasing the air path length in the intake air groove 15 and increasing the bending of the air path, and can play a role in reducing noise.

[0065] In some embodiments of the present application, referring to Figure 3 and Figure 9 as shown, a diversion rib 174 extending outward is provided at one end of the filter cavity 17 close to the first intake air port 161. The diversion rib 174 is used to block the air flow from entering the second intake air port 173 through the gap between the first filter element 156 and the filter cavity 17. By providing the diversion rib 174, the air flow entering from the first intake air port 161 is diverted into the first filter element 156 for filtration to ensure the gas quality flowing into the second intake air port 173. Preferably, the diversion rib 174 abuts against the first filter element 156, and the diversion rib 174 extends in a direction close to the first filter element 156. The diversion rib 174 plays a role in diverting the air flow and at the same time also plays a role in limiting the first filter element 156 to prevent the inward movement of the first filter element 156.

[0066] In some embodiments of the present application, the flow guiding rib 174 is arc-shaped and extends in a direction away from the first air inlet 161 in the direction close to the first filter element 156. The flow guiding rib 174 is an outwardly convex arc-shaped plate rib structure. The arc-shaped setting of the flow guiding rib 174 is beneficial to the smooth flow of gas and reduces the wind resistance. The outside air entering from the first air inlet 161 reaches the intake groove 15. Part of the gas directly enters the first filter element 156, and part of the gas impacts on the flow guiding rib 174; then it flows along the flow guiding rib 174 and enters the first filter element 156.

[0067] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions required to be protected by the present invention.

Claims

1. An air intake filtration module of an oxygen generator, characterized in that, Comprising: A filtering chamber, which is detachably arranged inside the oxygen generator; An avoidance groove, which is recessed along the inner wall of the filtering chamber and is used for avoiding the intake pipe head communicated with the compressor; The intake pipe head extends into the avoidance groove, and an air outlet hole matching the intake pipe head is penetrated through the groove wall of the avoidance groove, and one end of the intake pipe head is connected and installed at the air outlet hole.

2. The intake air filtration module according to claim 1, characterized in that, The air outlet hole is oppositely arranged with the intake end of the filtering chamber, and an air outlet nozzle extending into the avoidance groove is arranged along the air outlet hole, and the air outlet nozzle is hermetically connected with the intake pipe head.

3. The intake air filtration module according to claim 2, characterized in that, The intake pipe head has a pipe head part and a joint part bent and extended along the upper end of the pipe head part, and the joint part is hermetically arranged with the air outlet nozzle; the joint part is located inside the air outlet nozzle, and a circumferential sealing groove is arranged outside the joint part, and the sealing ring is located at the sealing groove.

4. The intake air filtration module according to any one of claims 1 to 3, characterized in that The filtering chamber has a first chamber wall oppositely arranged with the intake end and a second chamber wall connected with the first chamber wall, and the intake pipe head extends into the avoidance groove from the direction of the second chamber wall; the avoidance groove is arranged on the first chamber wall and the second chamber wall.

5. The intake air filtration module according to any one of claims 1 to 3, characterized in that It further includes a second filtering element arranged at the intake end of the filtering chamber, and a support and limit part abutted against the inner side of the second filtering element is arranged inside the filtering chamber, and the support and limit part is connected with the avoidance groove.

6. The intake air filtration module according to claim 5, characterized in that, The support and limit part is a plurality of spaced support columns extending from the avoidance groove to the intake end, and the second filtering element has a plurality of turning parts that can extend into the gaps between adjacent two support columns.

7. The intake air filtration module according to claim 5, wherein The filtering chamber has a cavity and a filtering frame surrounding the outside of the second filtering element, the filtering frame is detachably arranged on the cavity, and the edge of the filtering frame is bent to be provided with an outer retaining edge for limiting the second filtering element.

8. The intake air filtration module according to claim 5, wherein It further includes a first filtering element arranged outside the second filtering element, an intake groove is arranged on the outer shell of the oxygen generator, and the first filtering element is located inside the intake groove; an installation cavity for installing the filtering chamber is recessed on the groove wall of the intake groove.

9. The intake air filtration module according to claim 5, characterized in that The second filtering element is located outside the air outlet hole, and there is a gap between the second filtering element and the air outlet hole.

10. An oxygen generator, characterized in that, An intake air filtering module according to any one of claims 1 to 9.

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