Filtration structure and oxygen concentrator

Abstract

The present invention relates to a filter structure and an oxygen concentrator, and relates to the technical field of oxygen concentrators. The filter structure of the present invention comprises a housing, a cover plate, and a filter element. The housing is recessed inward to form a mounting portion. The cover plate is detachably mounted on the mounting portion, sealing one end of the mounting portion. The filter element is detachably mounted between the cover plate and the mounting portion. The technical solution disclosed in this application can address the problems of existing filter devices, such as inconvenient assembly and disassembly, a large number of parts, and low production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of oxygen concentrators, and in particular to a filtering structure and an oxygen concentrator. Background Art

[0002] As living standards improve and people's awareness of health and wellness grows, oxygen concentrators have become increasingly popular tools for home health care and rehabilitation. Filters are a crucial component of oxygen concentrators, removing dust and impurities from the air and improving oxygen quality. Existing filters are difficult to assemble and disassemble, require a large number of parts, and suffer from low production efficiency. Summary of the Invention

[0003] The embodiments of the present application provide a filtering structure and an oxygen concentrator, which can solve the problems of existing filtering devices such as inconvenient disassembly and assembly, a large number of parts, and low production efficiency.

[0004] In a first aspect, an embodiment of the present application provides a filtering structure, comprising:

[0005] a housing, the housing being recessed inwardly to form a mounting portion;

[0006] a cover plate detachably disposed on the mounting portion, the cover plate blocking one end of the mounting portion; and

[0007] The filter element is detachably arranged between the cover plate and the mounting portion.

[0008] In one embodiment, the mounting portion includes a side wall and a bottom wall connected to the side wall; wherein the side wall is detachably connected to the cover plate.

[0009] In one embodiment, a first hole segment and a second hole segment connected to the first hole segment are provided on the side wall, and the inner diameter of the first hole segment is smaller than the inner diameter of the second hole segment to form a step surface, wherein a buckle is provided on the inner wall of the second hole segment.

[0010] In one embodiment, the cover plate comprises:

[0011] a closing portion abutting against the step surface; and

[0012] an inserting portion, one end of which is disposed on the closing portion, an annular spacing being provided between the inserting portion and the side wall, and the filter element being located between the mounting portion and the inserting portion;

[0013] Wherein, the closing portion is provided with a slot that matches the buckle.

[0014] In one embodiment, the card slot includes:

[0015] a limiting section, provided on the closing portion, the limiting section extending along the circumference of the closing portion; and

[0016] A transition section is provided on the closing portion, and extends along the axial direction of the closing portion. One end of the transition section is connected to the limiting section, and the other end extends to an end of the closing portion close to the insertion portion.

[0017] In one embodiment, a limiting platform is provided on the bottom wall, and a limiting groove is provided on the limiting platform; wherein, one end of the insertion portion away from the closing portion is inserted into the limiting groove, and the inner wall of the filter element abuts against the outer wall of the limiting platform.

[0018] In one embodiment, a plurality of support bars cooperating with the filter element are provided on the outer wall of the insertion portion, the support bars are circumferentially spaced around the insertion portion, and the support bars extend along the axial direction of the insertion portion;

[0019] The support bar has an inclined surface on one side away from the insertion portion, and in the radial direction of the insertion portion, the length of the support bar at one end close to the closing portion is greater than the length of the support bar at one end away from the closing portion.

[0020] In one embodiment, at least one first air intake grille is provided on the insertion portion, at least one second air intake grille is provided on the side wall, and an air outlet pipe is provided on the bottom wall, one end of the air outlet pipe extends into the first hole segment and extends along the axial direction of the first hole segment;

[0021] Wherein, the inserting portion surrounds the air outlet pipe, and the first air intake grille, the second air intake grille and the air outlet pipe together form an air flow channel.

[0022] In one embodiment, the filtering structure includes a sealing member, which is disposed between the mounting portion and the cover plate, wherein a sealing groove for accommodating the sealing member is provided on the mounting portion.

[0023] In a second aspect, an embodiment of the present application provides an oxygen concentrator, comprising the filtering structure as described above.

[0024] Compared with the prior art, the advantage of the embodiments of the present application is that the mounting portion is formed by the inward recess of the shell, and the filter structure is directly designed on the shell of the oxygen concentrator, so that the filter structure and the shell of the oxygen concentrator form an integrated structure and are the same part. Compared with the existing filter device designed as a separate part that can be detachably mounted on the oxygen concentrator, the present invention reduces the shell of the filter device and the connection, fixation and other structures required for the shell of the filter device to be installed on the oxygen concentrator, and also reduces the steps of installing and fixing the filter device, thereby reducing the number of parts and installation hours and improving production efficiency; in addition, the mounting portion is formed by the inward recess of the shell, which facilitates the disassembly and replacement of the filter element without the need to disassemble the entire oxygen concentrator, thereby improving the comfort of use and user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Hereinafter, the present invention will be described in more detail based on embodiments with reference to the accompanying drawings.

[0026] Figure 1 is an exploded view of a filtering structure provided by one embodiment of the present invention;

[0027] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure of the filtering structure provided in;

[0028] Figure 3 yes Figure 1 A cross-sectional view of the filter structure provided in the top view direction;

[0029] Figure 4 yes Figure 3 Enlarged view of part A;

[0030] Figure 5 yes Figure 1 A schematic structural diagram of the mounting portion provided in the embodiment;

[0031] Figure 6 yes Figure 1 A schematic structural diagram of the cover plate provided in the embodiment;

[0032] Figure 7 yes Figure 6 Enlarged view of part B;

[0033] Figure 8 yes Figure 1 A schematic diagram of the structure of the buckle and the card slot when they are separated provided in the embodiment;

[0034] Figure 9 yes Figure 1 A schematic diagram of the structure of the buckle and the slot provided in the embodiment when they are engaged;

[0035] Figure 10is a schematic structural diagram of a primary filter provided by another embodiment of the present invention;

[0036] Figure 11 yes Figure 10 A cross-sectional view of a primary filter provided in the embodiment in the main viewing direction;

[0037] Figure 12 yes Figure 11 Magnified view of part C.

[0038] Reference numerals:

[0039] 1. Filter structure; 2. Primary filter;

[0040] 10. Housing;

[0041] 20. Mounting portion; 210. Side wall; 2101. First hole segment; 2102. Second hole segment; 2103. Buckle; 2104. Semicircular protrusion; 2105. Second air intake grille; 2106. Sealing groove; 2107. Third hole segment; 220. Bottom wall; 230. Limiting platform; 2301. Limiting groove; 240. Exhaust pipe;

[0042] 30, cover plate; 310, closing portion; 3101, surrounding edge; 320, inserting portion; 3201, first air intake grille; 340, slot; 3401, limiting section; 3402, transition section; 3403, semicircular recess;

[0043] 40. Filter element;

[0044] 50, support bar; 510, inclined plane;

[0045] 70. Seals;

[0046] 80. Filter portion; 810. Ring plate; 820. Bottom plate; 8201. Air outlet grid; 830. Sealing plate; 840. First filter element; 850. Notch; 860. Flow channel. DETAILED DESCRIPTION

[0047] The present invention will be further described below with reference to the accompanying drawings.

[0048] As people's living standards improve, their awareness of health care is also gradually increasing, and oxygen concentrators have gradually become a tool for many families to maintain health or promote recovery. The filter device is an important component of the oxygen concentrator, which is used to remove dust and impurities in the air and improve the quality of oxygen. Existing filter devices need to be frequently disassembled for cleaning and replacement of filter cotton after long-term use. Therefore, the filter is usually designed as a separate part that can be detachably installed inside the oxygen concentrator or on the outer casing of the oxygen concentrator. However, when the filter is installed inside the oxygen concentrator, the entire machine needs to be disassembled before it can be cleaned, which makes the disassembly and assembly of the filter extremely inconvenient; when the filter is installed on the outer casing of the oxygen concentrator, not only the installation layout needs to be considered, but also the number of parts increases, the installation time increases, and production efficiency is low.

[0049] Example 1

[0050] like Figure 1-Figure 4 As shown, a filtering structure includes a shell 10, a cover plate 30 and a filter element 40; the shell 10 is recessed inward to form a mounting portion 20; the cover plate 30 is detachably arranged on the mounting portion 20, and the cover plate 30 blocks one end of the mounting portion 20; the filter element 40 is detachably arranged between the cover plate 30 and the mounting portion 20.

[0051] As can be seen from the above, the housing 10 is recessed inward to form the mounting portion 20, and the filter structure is directly designed on the housing 10 of the oxygen concentrator, so that the filter structure and the housing 10 of the oxygen concentrator form an integrated structure, which is the same part. Compared with the existing filter device designed as a separate part that can be detachably mounted on the oxygen concentrator, the present invention reduces the housing 10 of the filter device and the connection, fixation and other structures required for the housing 10 of the filter device to be installed on the oxygen concentrator, and also reduces the steps of installing and fixing the filter device, thereby reducing the number of parts and installation hours, and improving production efficiency; in addition, the housing 10 is recessed inward to form the mounting portion 20, which facilitates the disassembly and replacement of the filter element 40 without disassembling the entire oxygen concentrator, thereby improving the comfort of use and user experience.

[0052] It should be noted that the housing 10 is the outer shell of the oxygen concentrator. Figure 1 、 Figure 2 As shown, the shell 10 is a part of the outer shell of the oxygen concentrator. The shell 10 can cooperate with another part of the outer shell of the oxygen concentrator to form a cavity together. The mounting portion 20 is formed by the shell 10 being recessed into the cavity.

[0053] It should also be noted that the filter element 40 includes but is not limited to filter cotton; for example, the filter element 40 is glass fiber filter cotton.

[0054] It should also be noted that the mounting portion 20 , the filter element 40 and the cover plate 30 are all cylindrical structures.

[0055] It should also be noted that the mounting portion 20 and the housing 10 are integrally formed by a mold.

[0056] Example 2

[0057] like Figure 1-Figure 4 As shown, the filtering structure includes a shell 10, a cover plate 30 and a filter element 40; the shell 10 is recessed inward to form a mounting portion 20; the cover plate 30 is detachably arranged on the mounting portion 20, and the cover plate 30 blocks one end of the mounting portion 20; the filter element 40 is detachably arranged between the cover plate 30 and the mounting portion 20.

[0058] As can be seen from the above, the housing 10 is recessed inward to form the mounting portion 20, and the filter structure is directly designed on the housing 10 of the oxygen concentrator, so that the filter structure and the housing 10 of the oxygen concentrator form an integrated structure, which is the same part. Compared with the existing filter device designed as a separate part that can be detachably mounted on the oxygen concentrator, the present invention reduces the housing 10 of the filter device and the connection, fixation and other structures required for the housing 10 of the filter device to be installed on the oxygen concentrator, and also reduces the steps of installing and fixing the filter device, thereby reducing the number of parts and installation hours, and improving production efficiency; in addition, the housing 10 is recessed inward to form the mounting portion 20, which facilitates the disassembly and replacement of the filter element 40 without disassembling the entire oxygen concentrator, thereby improving the comfort of use and user experience.

[0059] It should be noted that the housing 10 is the outer shell of the oxygen concentrator. Figure 1 、 Figure 2 As shown, the shell 10 is a part of the outer shell of the oxygen concentrator. The shell 10 can cooperate with another part of the outer shell of the oxygen concentrator to form a cavity together. The mounting portion 20 is formed by the shell 10 being recessed into the cavity.

[0060] It should also be noted that the filter element 40 includes but is not limited to filter cotton; for example, the filter element 40 is glass fiber filter cotton.

[0061] It should also be noted that the mounting portion 20 , the filter element 40 and the cover plate 30 are all cylindrical structures.

[0062] It should also be noted that the mounting portion 20 and the housing 10 are integrally formed by a mold.

[0063] like Figure 4 、 Figure 5 As shown, in some embodiments, the mounting portion 20 includes a side wall 210 and a bottom wall connected to the side wall 210 ; wherein the side wall 210 is detachably connected to the cover plate 30 .

[0064] like Figure 5As shown, in some embodiments, a first hole segment 2101 and a second hole segment 2102 connected to the first hole segment 2101 are provided on the side wall 210, and the inner diameter of the first hole segment 2101 is smaller than the inner diameter of the second hole segment 2102 to form a step surface, wherein a buckle 2103 is provided on the inner wall of the second hole segment 2102.

[0065] It should be noted that there can be multiple buckles 2103, which are evenly spaced around the second hole segment 2102. For example, there can be three buckles 2103, which are evenly spaced around the second hole segment 2102.

[0066] It should also be noted that if Figure 8 、 Figure 9 As shown, the buckle 2103 is a rectangular buckle 2103 , that is, the cross section of the buckle 2103 is rectangular, and chamfers are provided at the corners of the rectangular buckle 2103 .

[0067] like Figure 4 ,like Figure 6 、 Figure 7 As shown, in some embodiments, the cover plate 30 includes a closing portion 310 and an inserting portion 320; the closing portion 310 abuts against the step surface; one end of the inserting portion 320 is arranged on the closing portion 310, and there is an annular spacing between the inserting portion 320 and the side wall 210, and the filter element 40 is located between the mounting portion 20 and the inserting portion 320; wherein, a card slot 340 is provided on the closing portion 310 to cooperate with the buckle 2103.

[0068] The closure portion 310 blocks one end of the mounting portion 20 to prevent airflow leakage, which reduces airflow and results in a poor user experience. The insertion portion 320 provides a structural foundation for installing the filter element 40 and establishing an airflow channel. The stepped surface provides positioning for the installation of the cover plate 30. The closure portion 310 and the mounting portion 20 are detachably connected by the engagement of the latch 2103 and the slot 340, making it simple and convenient for users to quickly assemble and disassemble the filter device.

[0069] It should be noted that the specific size of the annular spacing is set according to actual needs and is not limited in this application; however, the annular spacing cannot be too small. When the annular spacing is too small, the filter element 40 cannot be installed normally. Of course, the annular spacing cannot be too large. When the annular spacing is too large, the volume of the mounting portion 20 increases, affecting the layout and structural design of the oxygen concentrator.

[0070] It should also be noted that there can be multiple slots 340, and the multiple slots 340 are arranged at equal intervals around the circumference of the closure portion 310, and the multiple slots 340 correspond one-to-one with the multiple buckles 2103. For example, there are three slots 340, and the three slots 340 are arranged at equal intervals around the circumference of the closure portion 310, and the three slots 340 correspond one-to-one with the three buckles 2103, and the slots 340 and the corresponding buckles 2103 are engaged.

[0071] It should also be noted that a handle is provided on one end of the closing portion 310 away from the inserting portion 320 to facilitate installation of the cover 30 .

[0072] It should also be noted that if Figure 4 -like Figure 6 As shown, a peripheral edge 3101 is provided on the outer wall of the closing portion 310, and a third hole section 2107 is provided on the side wall 210, communicating with the second hole section 2102. The inner diameter of the third hole section 2107 is larger than that of the second hole section 2102, forming a stepped structure. The peripheral edge 3101 abuts against the stepped structure and cooperates with the third hole section 2107. This facilitates positioning of the cover plate 30 during installation and speeds up assembly and disassembly of the filter structure.

[0073] like Figure 6 、 Figure 7 As shown, in some embodiments, the slot 340 includes a limiting section 3401 and a transition section 3402; the limiting section 3401 is arranged on the closing portion 310, and the limiting section 3401 extends along the circumferential direction of the closing portion 310; the transition section 3402 is arranged on the closing portion 310, and the transition section 3402 extends along the axial direction of the closing portion 310, one end of the transition section 3402 is connected to the limiting section 3401, and the other end extends to one end of the closing portion 310 close to the insertion portion 320.

[0074] By providing the over-limit section 3401 and the transition section 3402, the slot 340 and the buckle 2103 form a rotating buckle 2103 fixation, and the cover plate 30 can be closed and opened by rotating the cover plate 30 clockwise or counterclockwise. While ensuring convenience, the reliability of the connection is also guaranteed, and the position of the cover plate 30 is effectively limited to prevent the cover plate 30 from loosening and deviating during operation, causing air to enter the oxygen concentrator directly without passing through the filter element 40.

[0075] like Figure 7 、 Figure 8 As shown, in some embodiments, a semicircular convex portion 2104 is provided on the buckle 2103 , and a semicircular concave portion 3403 cooperating with the semicircular convex portion 2104 is provided on the limiting section 3401 .

[0076] The reliability of the connection can be improved by setting a semicircular convex position 2104 and a semicircular concave position; in addition, the semicircular shape facilitates the engagement and separation of the semicircular convex position and the semicircular concave position. Compared with a rectangular structure with right angles, it is less likely to get stuck during the disassembly and assembly process, and is easy to disassemble and assemble.

[0077] It should also be noted that if Figure 1 As shown, an arrow mark is provided on the housing 10 to indicate the opening direction of the cover 30; Figure 8 As shown, when the cover 30 needs to be opened, the cover 30 is rotated clockwise, the semicircular convex portion 2104 is separated from the semicircular concave portion 3403, and when the transition section 3402 abuts against the buckle 2103, the rotation is stopped, and the cover 30 can be opened; Figure 9 As shown, when the cover plate 30 needs to be locked, the cover plate 30 is rotated counterclockwise, the semicircular protrusion 2104 is aligned with the semicircular recess 3403, and the semicircular protrusion 2104 is snapped into the semicircular recess 3403, and the cover plate 30 can be locked.

[0078] It should also be noted that if Figure 7 、 Figure 8 As shown, the cross-sections of the semicircular convex portion 2104 and the semicircular concave portion 3403 are both semicircular. For example, the semicircular convex portion 2104 and the semicircular concave portion 3403 are both hemispherical structures.

[0079] like Figure 4 As shown, in some embodiments, a limiting platform 230 is provided on the bottom wall, and a limiting groove 2301 is provided on the limiting platform 230; wherein, one end of the insertion portion 320 away from the closing portion 310 is inserted into the limiting groove 2301, and the inner wall of the filter element 40 abuts against the outer wall of the limiting platform 230.

[0080] By setting the limiting groove 2301 to limit the insertion part 320 in the radial and axial directions, the reliability of the installation of the cover 30 is further improved; at the same time, support can be provided for the insertion part 320 and the filter element 40 to prevent the cover 30 and the filter element 40 from being deflected or shifted under the action of airflow.

[0081] It should be noted that the limiting platform 230 can be a continuous ring or a discontinuous ring.

[0082] It should also be noted that if Figure 4 As shown, the limiting groove 2301 includes a first limiting section and a second limiting section connected to the first limiting section; the inner wall of the first limiting section is a conical annular surface, and the inner diameter of the first limiting section close to the second limiting section is smaller than the inner diameter of the first limiting section away from the second limiting section, so that the insertion part 320 can be quickly aligned with the limiting groove 2301, guiding the insertion part 320 so that the insertion part 320 can be quickly inserted into the limiting groove 2301.

[0083] It should also be noted that the end of the filter element 40 away from the limiting platform 230 is in contact with the mounting portion 20 .

[0084] like Figure 4-Figure 6 As shown, in some embodiments, at least one first air intake grille 3201 is provided on the insertion portion 320, at least one second air intake grille 2105 is provided on the side wall 210, and an air outlet pipe 240 is provided on the bottom wall, and one end of the air outlet pipe 240 extends into the first hole section 2101 and extends along the axial direction of the first hole section 2101; wherein, the insertion portion 320 surrounds the air outlet pipe 240, and the first air intake grille 3201, the second air intake grille 2105 and the air outlet pipe together form an air flow channel.

[0085] By extending one end of the air outlet pipe 240 into the first hole section 2101 and extending it along the axial direction of the side wall 210, since when the air flow enters a small space from a large space, the flow velocity of the air flow will increase, the collision friction will increase, the vibration amplitude will become larger, and noise will be generated, the present invention places the air outlet pipe away from the side wall, so that the exhaust noise is not directly generated on the side wall and transmitted outward, but is generated inside the filter structure. When it is transmitted outward, it needs to be weakened by the side wall of the filter structure, thereby reducing noise and improving user experience.

[0086] It should be noted that a plurality of first air intake grilles 3201 are provided on the insertion portion 320, and a plurality of second air intake grilles 2105 are provided on the side wall 210. The number of the first air intake grilles 3201 and the second air intake grilles 2105 may be equal or unequal, and this application does not impose any restrictions.

[0087] For example, Figure 2 、 Figure 6 As shown, three first air intake grilles 3201 are provided on the insertion portion 320 , and six second air intake grilles 2105 are provided on the side wall 210 . The number of the first air intake grilles 3201 and the number of the second air intake grilles 2105 are not equal.

[0088] It should also be noted that every two support members correspond to a first air intake grille 3201, and the support members are respectively located on both sides of the corresponding first air intake grille 3201; by arranging the support members on both sides of the first air intake grille 3201, the filter element 40 is effectively supported to prevent the filter element 40 from loosening and deviating when the airflow enters the first air intake grille 3201.

[0089] It should also be noted that if Figure 4 As shown, the flow path in the air flow channel is to enter from the second air intake grille 2105, flow into the first air intake grille 3201 after being filtered by the filter element 40, and then flow out through the air outlet pipe 240, completing the filtration in the filter structure.

[0090] Example 3

[0091] like Figure 1-Figure 4 As shown, the filtering structure includes a shell 10, a cover plate 30 and a filter element 40; the shell 10 is recessed inward to form a mounting portion 20; the cover plate 30 is detachably arranged on the mounting portion 20, and the cover plate 30 blocks one end of the mounting portion 20; the filter element 40 is detachably arranged between the cover plate 30 and the mounting portion 20.

[0092] As can be seen from the above, the housing 10 is recessed inward to form the mounting portion 20, and the filter structure is directly designed on the housing 10 of the oxygen concentrator, so that the filter structure and the housing 10 of the oxygen concentrator form an integrated structure, which is the same part. Compared with the existing filter device designed as a separate part that can be detachably mounted on the oxygen concentrator, the present invention reduces the housing 10 of the filter device and the connection, fixation and other structures required for the housing 10 of the filter device to be installed on the oxygen concentrator, and also reduces the steps of installing and fixing the filter device, thereby reducing the number of parts and installation hours, and improving production efficiency; in addition, the housing 10 is recessed inward to form the mounting portion 20, which facilitates the disassembly and replacement of the filter element 40 without disassembling the entire oxygen concentrator, thereby improving the comfort of use and user experience.

[0093] It should be noted that the housing 10 is the outer shell of the oxygen concentrator. Figure 1 、 Figure 2 As shown, the shell 10 is a part of the outer shell of the oxygen concentrator. The shell 10 can cooperate with another part of the outer shell of the oxygen concentrator to form a cavity together. The mounting portion 20 is formed by the shell 10 being recessed into the cavity.

[0094] It should also be noted that the filter element 40 includes but is not limited to filter cotton; for example, the filter element 40 is glass fiber filter cotton.

[0095] It should also be noted that the mounting portion 20 , the filter element 40 and the cover plate 30 are all cylindrical structures.

[0096] It should also be noted that the mounting portion 20 and the housing 10 are integrally formed by a mold.

[0097] like Figure 4 、 Figure 5 As shown, in some embodiments, the mounting portion 20 includes a side wall 210 and a bottom wall connected to the side wall 210 ; wherein the side wall 210 is detachably connected to the cover plate 30 .

[0098] like Figure 5 As shown, in some embodiments, a first hole segment 2101 and a second hole segment 2102 connected to the first hole segment 2101 are provided on the side wall 210, and the inner diameter of the first hole segment 2101 is smaller than the inner diameter of the second hole segment 2102 to form a step surface, wherein a buckle 2103 is provided on the inner wall of the second hole segment 2102.

[0099] It should be noted that there can be multiple buckles 2103, which are evenly spaced around the second hole segment 2102. For example, there can be three buckles 2103, which are evenly spaced around the second hole segment 2102.

[0100] It should also be noted that if Figure 8 、 Figure 9 As shown, the buckle 2103 is a rectangular buckle 2103 , that is, the cross section of the buckle 2103 is rectangular, and chamfers are provided at the corners of the rectangular buckle 2103 .

[0101] like Figure 4 ,like Figure 6 、 Figure 7 As shown, in some embodiments, the cover plate 30 includes a closing portion 310 and an inserting portion 320; the closing portion 310 abuts against the step surface; one end of the inserting portion 320 is arranged on the closing portion 310, and there is an annular spacing between the inserting portion 320 and the side wall 210, and the filter element 40 is located between the mounting portion 20 and the inserting portion 320; wherein, a card slot 340 is provided on the closing portion 310 to cooperate with the buckle 2103.

[0102] The closure portion 310 blocks one end of the mounting portion 20 to prevent airflow leakage, which reduces airflow and results in a poor user experience. The insertion portion 320 provides a structural foundation for installing the filter element 40 and establishing an airflow channel. The stepped surface provides positioning for the installation of the cover plate 30. The closure portion 310 and the mounting portion 20 are detachably connected by the engagement of the latch 2103 and the slot 340, making it simple and convenient for users to quickly assemble and disassemble the filter device.

[0103] It should be noted that the specific size of the annular spacing is set according to actual needs and is not limited in this application; however, the annular spacing cannot be too small. When the annular spacing is too small, the filter element 40 cannot be installed normally. Of course, the annular spacing cannot be too large. When the annular spacing is too large, the volume of the mounting portion 20 increases, affecting the layout and structural design of the oxygen concentrator.

[0104] It should also be noted that there can be multiple slots 340, and the multiple slots 340 are arranged at equal intervals around the circumference of the closure portion 310, and the multiple slots 340 correspond one-to-one with the multiple buckles 2103. For example, there are three slots 340, and the three slots 340 are arranged at equal intervals around the circumference of the closure portion 310, and the three slots 340 correspond one-to-one with the three buckles 2103, and the slots 340 and the corresponding buckles 2103 are engaged.

[0105] It should also be noted that a handle is provided on one end of the closing portion 310 away from the inserting portion 320 to facilitate installation of the cover 30 .

[0106] It should also be noted that if Figure 4 -like Figure 6 As shown, a peripheral edge 3101 is provided on the outer wall of the closing portion 310, and a third hole section 2107 is provided on the side wall 210, communicating with the second hole section 2102. The inner diameter of the third hole section 2107 is larger than that of the second hole section 2102, forming a stepped structure. The peripheral edge 3101 abuts against the stepped structure and cooperates with the third hole section 2107. This facilitates positioning of the cover plate 30 during installation and speeds up assembly and disassembly of the filter structure.

[0107] like Figure 6 、 Figure 7 As shown, in some embodiments, the slot 340 includes a limiting section 3401 and a transition section 3402; the limiting section 3401 is arranged on the closing portion 310, and the limiting section 3401 extends along the circumferential direction of the closing portion 310; the transition section 3402 is arranged on the closing portion 310, and the transition section 3402 extends along the axial direction of the closing portion 310, one end of the transition section 3402 is connected to the limiting section 3401, and the other end extends to one end of the closing portion 310 close to the insertion portion 320.

[0108] By providing the over-limit section 3401 and the transition section 3402, the slot 340 and the buckle 2103 form a rotating buckle 2103 fixation, and the cover plate 30 can be closed and opened by rotating it clockwise or counterclockwise. While ensuring convenience, the reliability of the connection is also guaranteed, and the position of the cover plate 30 is effectively limited to prevent the cover plate 30 from loosening and deviating during operation, causing air to enter the oxygen concentrator directly without passing through the filter element 40.

[0109] like Figure 7 、 Figure 8 As shown, in some embodiments, a semicircular protrusion 2104 is provided on the buckle 2103, and a semicircular recess 3403 cooperating with the semicircular protrusion 2104 is provided on the limiting section 3401, thereby further improving the reliability of the connection.

[0110] The reliability of the connection can be improved by setting a semicircular convex position 2104 and a semicircular concave position; in addition, the semicircular shape facilitates the engagement and separation of the semicircular convex position and the semicircular concave position. Compared with a rectangular structure with right angles, it is less likely to get stuck during the disassembly and assembly process, and is easy to disassemble and assemble.

[0111] It should also be noted that if Figure 1 As shown, an arrow mark is provided on the housing 10 to indicate the opening direction of the cover 30; Figure 8As shown, when the cover 30 needs to be opened, the cover 30 is rotated clockwise, the semicircular convex portion 2104 is separated from the semicircular concave portion 3403, and when the transition section 3402 abuts against the buckle 2103, the rotation is stopped, and the cover 30 can be opened; Figure 9 As shown, when the cover plate 30 needs to be locked, the cover plate 30 is rotated counterclockwise, the semicircular protrusion 2104 is aligned with the semicircular recess 3403, and the semicircular protrusion 2104 is snapped into the semicircular recess 3403, and the cover plate 30 can be locked.

[0112] It should also be noted that if Figure 7 、 Figure 8 As shown, the cross-sections of the semicircular convex portion 2104 and the semicircular concave portion 3403 are both semicircular. For example, the semicircular convex portion 2104 and the semicircular concave portion 3403 are both hemispherical structures.

[0113] like Figure 4 As shown, in some embodiments, a limiting platform 230 is provided on the bottom wall, and a limiting groove 2301 is provided on the limiting platform 230; wherein, one end of the insertion portion 320 away from the closing portion 310 is inserted into the limiting groove 2301, and the inner wall of the filter element 40 abuts against the outer wall of the limiting platform 230.

[0114] By setting the limiting groove 2301 to limit the insertion part 320 in the radial and axial directions, the reliability of the installation of the cover 30 is further improved; at the same time, support can be provided for the insertion part 320 and the filter element 40 to prevent the cover 30 and the filter element 40 from being deflected or shifted under the action of airflow.

[0115] It should be noted that the limiting platform 230 can be a continuous ring or a discontinuous ring.

[0116] It should also be noted that if Figure 4 As shown, the limiting groove 2301 includes a first limiting section and a second limiting section connected to the first limiting section; the inner wall of the first limiting section is a conical annular surface, and the inner diameter of the first limiting section close to the second limiting section is smaller than the inner diameter of the first limiting section away from the second limiting section, so that the insertion part 320 can be quickly aligned with the limiting groove 2301, guiding the insertion part 320 so that the insertion part 320 can be quickly inserted into the limiting groove 2301.

[0117] It should also be noted that the end of the filter element 40 away from the limiting platform 230 is in contact with the mounting portion 20 .

[0118] like Figure 4 、 Figure 6As shown, in some embodiments, a plurality of support bars 50 cooperating with the filter element 40 are provided on the outer wall of the insertion portion 320, and the support bars 50 are arranged circumferentially at intervals around the insertion portion 320, and the support bars 50 extend along the axial direction of the insertion portion 320; wherein, the side of the support bar 50 away from the insertion portion 320 has a slope 510, and in the radial direction of the insertion portion 320, the length of the end of the support bar 50 close to the closed portion 310 is greater than the length of the end of the support bar 50 away from the closed portion 310.

[0119] The support bars 50 provide a structural foundation for the installation of the filter element 40. The inclined surface 510 ensures that the filter cotton is effectively fixed while increasing the installation speed of the filter cotton.

[0120] It should be noted that a rounded transition is provided at one end of the support bar 50 away from the closing portion 310 to guide the disassembly and assembly of the filter cotton, thereby facilitating quick disassembly and installation.

[0121] It should also be noted that there is an interference fit between the filter element 40 and the support element, and there is a preset distance between the filter element 40 and the side wall 210.

[0122] like Figure 4-Figure 6 As shown, in some embodiments, at least one first air intake grille 3201 is provided on the insertion portion 320, at least one second air intake grille 2105 is provided on the side wall 210, and an air outlet pipe 240 is provided on the bottom wall, and one end of the air outlet pipe 240 extends into the first hole section 2101 and extends along the axial direction of the first hole section 2101; wherein, the insertion portion 320 surrounds the air outlet pipe 240, and the first air intake grille 3201, the second air intake grille 2105 and the air outlet pipe together form an air flow channel.

[0123] By extending one end of the outlet pipe 240 into the first hole section 2101 and extending it along the axial direction of the side wall 210, the airflow velocity will increase when the airflow enters a small space from a large space, the collision friction will increase, the vibration amplitude will increase, and noise will be generated.

[0124] Far away from the side walls, the exhaust noise is not directly generated on the side walls and transmitted outward, but generated inside the filter structure. When it is transmitted outward, it needs to be weakened by the side walls of the filter structure, thereby reducing noise and improving user experience.

[0125] It should be noted that a plurality of first air intake grilles 3201 are provided on the insertion portion 320, and a plurality of second air intake grilles 2105 are provided on the side wall 210. The number of the first air intake grilles 3201 and the second air intake grilles 2105 may be equal or unequal, and this application does not impose any restrictions.

[0126] For example, Figure 2 、 Figure 6As shown, three first air intake grilles 3201 are provided on the insertion portion 320 , and six second air intake grilles 2105 are provided on the side wall 210 . The number of the first air intake grilles 3201 and the number of the second air intake grilles 2105 are not equal.

[0127] It should also be noted that every two support members correspond to a first air intake grille 3201, and the support members are respectively located on both sides of the corresponding first air intake grille 3201; by arranging the support members on both sides of the first air intake grille 3201, the filter element 40 is effectively supported to prevent the filter element 40 from loosening and deviating when the airflow enters the first air intake grille 3201.

[0128] It should also be noted that if Figure 4 As shown, the flow path in the air flow channel is to enter from the second air intake grille 2105, flow into the first air intake grille 3201 after being filtered by the filter element 40, and then flow out through the air outlet pipe 240, completing the filtration in the filter structure.

[0129] Example 4

[0130] like Figure 1-Figure 4 As shown, the filtering structure includes a shell 10, a cover plate 30 and a filter element 40; the shell 10 is recessed inward to form a mounting portion 20; the cover plate 30 is detachably arranged on the mounting portion 20, and the cover plate 30 blocks one end of the mounting portion 20; the filter element 40 is detachably arranged between the cover plate 30 and the mounting portion 20.

[0131] As can be seen from the above, the housing 10 is recessed inward to form the mounting portion 20, and the filter structure is directly designed on the housing 10 of the oxygen concentrator, so that the filter structure and the housing 10 of the oxygen concentrator form an integrated structure, which is the same part. Compared with the existing filter device designed as a separate part that can be detachably mounted on the oxygen concentrator, the present invention reduces the housing 10 of the filter device and the connection, fixation and other structures required for the housing 10 of the filter device to be installed on the oxygen concentrator, and also reduces the steps of installing and fixing the filter device, thereby reducing the number of parts and installation hours, and improving production efficiency; in addition, the housing 10 is recessed inward to form the mounting portion 20, which facilitates the disassembly and replacement of the filter element 40 without disassembling the entire oxygen concentrator, thereby improving the comfort of use and user experience.

[0132] It should be noted that the housing 10 is the outer shell of the oxygen concentrator. Figure 1 、 Figure 2 As shown, the shell 10 is a part of the outer shell of the oxygen concentrator. The shell 10 can cooperate with another part of the outer shell of the oxygen concentrator to form a cavity together. The mounting portion 20 is formed by the shell 10 being recessed into the cavity.

[0133] It should also be noted that the filter element 40 includes but is not limited to filter cotton; for example, the filter element 40 is glass fiber filter cotton.

[0134] It should also be noted that the mounting portion 20 , the filter element 40 and the cover plate 30 are all cylindrical structures.

[0135] It should also be noted that the mounting portion 20 and the housing 10 are integrally formed by a mold.

[0136] like Figure 4 、 Figure 5 As shown, in some embodiments, the mounting portion 20 includes a side wall 210 and a bottom wall connected to the side wall 210 ; wherein the side wall 210 is detachably connected to the cover plate 30 .

[0137] like Figure 5 As shown, in some embodiments, a first hole segment 2101 and a second hole segment 2102 connected to the first hole segment 2101 are provided on the side wall 210, and the inner diameter of the first hole segment 2101 is smaller than the inner diameter of the second hole segment 2102 to form a step surface, wherein a buckle 2103 is provided on the inner wall of the second hole segment 2102.

[0138] It should be noted that there can be multiple buckles 2103, which are evenly spaced around the second hole segment 2102. For example, there can be three buckles 2103, which are evenly spaced around the second hole segment 2102.

[0139] It should also be noted that if Figure 8 、 Figure 9 As shown, the buckle 2103 is a rectangular buckle 2103 , that is, the cross section of the buckle 2103 is rectangular, and chamfers are provided at the corners of the rectangular buckle 2103 .

[0140] like Figure 4 ,like Figure 6 、 Figure 7 As shown, in some embodiments, the cover plate 30 includes a closing portion 310 and an inserting portion 320; the closing portion 310 abuts against the step surface; one end of the inserting portion 320 is arranged on the closing portion 310, and there is an annular spacing between the inserting portion 320 and the side wall 210, and the filter element 40 is located between the mounting portion 20 and the inserting portion 320; wherein, a card slot 340 is provided on the closing portion 310 to cooperate with the buckle 2103.

[0141] The closure portion 310 blocks one end of the mounting portion 20 to prevent airflow leakage, which reduces airflow and results in a poor user experience. The insertion portion 320 provides a structural foundation for installing the filter element 40 and establishing an airflow channel. The stepped surface provides positioning for the installation of the cover plate 30. The closure portion 310 and the mounting portion 20 are detachably connected by the engagement of the latch 2103 and the slot 340, making it simple and convenient for users to quickly assemble and disassemble the filter device.

[0142] It should be noted that the specific size of the annular spacing is set according to actual needs and is not limited in this application; however, the annular spacing cannot be too small. When the annular spacing is too small, the filter element 40 cannot be installed normally. Of course, the annular spacing cannot be too large. When the annular spacing is too large, the volume of the mounting portion 20 increases, affecting the layout and structural design of the oxygen concentrator.

[0143] It should also be noted that there can be multiple slots 340, and the multiple slots 340 are arranged at equal intervals around the circumference of the closure portion 310, and the multiple slots 340 correspond one-to-one with the multiple buckles 2103. For example, there are three slots 340, and the three slots 340 are arranged at equal intervals around the circumference of the closure portion 310, and the three slots 340 correspond one-to-one with the three buckles 2103, and the slots 340 and the corresponding buckles 2103 are engaged.

[0144] It should also be noted that a handle is provided on one end of the closing portion 310 away from the inserting portion 320 to facilitate installation of the cover 30 .

[0145] It should also be noted that if Figure 4 -like Figure 6 As shown, a peripheral edge 3101 is provided on the outer wall of the closing portion 310, and a third hole section 2107 is provided on the side wall 210, communicating with the second hole section 2102. The inner diameter of the third hole section 2107 is larger than that of the second hole section 2102, forming a stepped structure. The peripheral edge 3101 abuts against the stepped structure and cooperates with the third hole section 2107. This facilitates positioning of the cover plate 30 during installation and speeds up assembly and disassembly of the filter structure.

[0146] like Figure 6 、 Figure 7 As shown, in some embodiments, the slot 340 includes a limiting section 3401 and a transition section 3402; the limiting section 3401 is arranged on the closing portion 310, and the limiting section 3401 extends along the circumferential direction of the closing portion 310; the transition section 3402 is arranged on the closing portion 310, and the transition section 3402 extends along the axial direction of the closing portion 310, one end of the transition section 3402 is connected to the limiting section 3401, and the other end extends to one end of the closing portion 310 close to the insertion portion 320.

[0147] By providing the over-limit section 3401 and the transition section 3402, the slot 340 and the buckle 2103 form a rotating buckle 2103 fixation, and the cover plate 30 can be closed and opened by rotating it clockwise or counterclockwise. While ensuring convenience, the reliability of the connection is also guaranteed, and the position of the cover plate 30 is effectively limited to prevent the cover plate 30 from loosening and deviating during operation, causing air to enter the oxygen concentrator directly without passing through the filter element 40.

[0148] like Figure 7 、 Figure 8 As shown, in some embodiments, a semicircular protrusion 2104 is provided on the buckle 2103, and a semicircular recess 3403 cooperating with the semicircular protrusion 2104 is provided on the limiting section 3401, thereby further improving the reliability of the connection.

[0149] The reliability of the connection can be improved by setting a semicircular convex position 2104 and a semicircular concave position; in addition, the semicircular shape facilitates the engagement and separation of the semicircular convex position and the semicircular concave position. Compared with a rectangular structure with right angles, it is less likely to get stuck during the disassembly and assembly process, and is easy to disassemble and assemble.

[0150] It should also be noted that if Figure 1 As shown, an arrow mark is provided on the housing 10 to indicate the opening direction of the cover 30; Figure 8 As shown, when the cover 30 needs to be opened, the cover 30 is rotated clockwise, the semicircular convex portion 2104 is separated from the semicircular concave portion 3403, and when the transition section 3402 abuts against the buckle 2103, the rotation is stopped, and the cover 30 can be opened; Figure 9 As shown, when the cover plate 30 needs to be locked, the cover plate 30 is rotated counterclockwise, the semicircular protrusion 2104 is aligned with the semicircular recess 3403, and the semicircular protrusion 2104 is snapped into the semicircular recess 3403, and the cover plate 30 can be locked.

[0151] It should also be noted that if Figure 7 、 Figure 8 As shown, the cross-sections of the semicircular convex portion 2104 and the semicircular concave portion 3403 are both semicircular. For example, the semicircular convex portion 2104 and the semicircular concave portion 3403 are both hemispherical structures.

[0152] like Figure 4 As shown, in some embodiments, a limiting platform 230 is provided on the bottom wall, and a limiting groove 2301 is provided on the limiting platform 230; wherein, one end of the insertion portion 320 away from the closing portion 310 is inserted into the limiting groove 2301, and the inner wall of the filter element 40 abuts against the outer wall of the limiting platform 230.

[0153] By setting the limiting groove 2301 to limit the insertion part 320 in the radial and axial directions, the reliability of the installation of the cover 30 is further improved; at the same time, support can be provided for the insertion part 320 and the filter element 40 to prevent the cover 30 and the filter element 40 from being deflected or shifted under the action of airflow.

[0154] It should be noted that the limiting platform 230 can be a continuous ring or a discontinuous ring.

[0155] It should also be noted that if Figure 4 As shown, the limiting groove 2301 includes a first limiting section and a second limiting section connected to the first limiting section; the inner wall of the first limiting section is a conical annular surface, and the inner diameter of the first limiting section close to the second limiting section is smaller than the inner diameter of the first limiting section away from the second limiting section, so that the insertion part 320 can be quickly aligned with the limiting groove 2301, guiding the insertion part 320 so that the insertion part 320 can be quickly inserted into the limiting groove 2301.

[0156] It should also be noted that the end of the filter element 40 away from the limiting platform 230 is in contact with the mounting portion 20 .

[0157] like Figure 4 、 Figure 6 As shown, in some embodiments, a plurality of support bars 50 cooperating with the filter element 40 are provided on the outer wall of the insertion portion 320, and the support bars 50 are arranged circumferentially at intervals around the insertion portion 320, and the support bars 50 extend along the axial direction of the insertion portion 320; wherein, the side of the support bar 50 away from the insertion portion 320 has a slope 510, and in the radial direction of the insertion portion 320, the length of the end of the support bar 50 close to the closed portion 310 is greater than the length of the end of the support bar 50 away from the closed portion 310.

[0158] The support bars 50 provide a structural foundation for the installation of the filter element 40. The inclined surface 510 ensures that the filter cotton is effectively fixed while increasing the installation speed of the filter cotton.

[0159] It should be noted that a rounded transition is provided at one end of the support bar 50 away from the closing portion 310 to guide the disassembly and assembly of the filter cotton, thereby facilitating quick disassembly and installation.

[0160] It should also be noted that there is an interference fit between the filter element 40 and the support element, and there is a preset distance between the filter element 40 and the side wall 210.

[0161] like Figure 4-Figure 6As shown, in some embodiments, at least one first air intake grille 3201 is provided on the insertion portion 320, at least one second air intake grille 2105 is provided on the side wall 210, and an air outlet pipe 240 is provided on the bottom wall, and one end of the air outlet pipe 240 extends into the first hole section 2101 and extends along the axial direction of the first hole section 2101; wherein, the insertion portion 320 surrounds the air outlet pipe 240, and the first air intake grille 3201, the second air intake grille 2105 and the air outlet pipe together form an air flow channel.

[0162] By extending one end of the outlet pipe 240 into the first hole section 2101 and extending it along the axial direction of the side wall 210, the airflow velocity will increase when the airflow enters a small space from a large space, the collision friction will increase, the vibration amplitude will increase, and noise will be generated.

[0163] Far away from the side walls, the exhaust noise is not directly generated on the side walls and transmitted outward, but generated inside the filter structure. When it is transmitted outward, it needs to be weakened by the side walls of the filter structure, thereby reducing noise and improving user experience.

[0164] It should be noted that a plurality of first air intake grilles 3201 are provided on the insertion portion 320, and a plurality of second air intake grilles 2105 are provided on the side wall 210. The number of the first air intake grilles 3201 and the second air intake grilles 2105 may be equal or unequal, and this application does not impose any restrictions.

[0165] For example, Figure 2 、 Figure 6 As shown, three first air intake grilles 3201 are provided on the insertion portion 320 , and six second air intake grilles 2105 are provided on the side wall 210 . The number of the first air intake grilles 3201 and the number of the second air intake grilles 2105 are not equal.

[0166] It should also be noted that every two support members correspond to a first air intake grille 3201, and the support members are respectively located on both sides of the corresponding first air intake grille 3201; by arranging the support members on both sides of the first air intake grille 3201, the filter element 40 is effectively supported to prevent the filter element 40 from loosening and deviating when the airflow enters the first air intake grille 3201.

[0167] It should also be noted that if Figure 4 As shown, the flow path in the air flow channel is to enter from the second air intake grille 2105, flow into the first air intake grille 3201 after being filtered by the filter element 40, and then flow out through the air outlet pipe 240, completing the filtration in the filter structure.

[0168] like Figure 1 、 Figure 4As shown, in some embodiments, the filtering structure includes a sealing member 70 , which is disposed between the mounting portion 20 and the cover plate 30 , wherein a sealing groove 2106 for accommodating the sealing member 70 is disposed on the mounting portion 20 .

[0169] The sealing member 70 is provided to ensure the sealing of the connection between the cover plate 30 and the mounting portion 20 , thereby preventing airflow from leaking from the joint surface between the cover plate 30 and the mounting portion 20 , and preventing external impurities such as dust and moisture from entering the mounting portion 20 .

[0170] It should be noted that the sealing member 70 includes but is not limited to a rubber sealing member 70 . For example, the sealing member 70 is an O-ring.

[0171] It should also be noted that the sealing groove 2106 is provided on the second hole section 2102 .

[0172] Example 5

[0173] At least one embodiment of the present application further provides an oxygen concentrator, comprising the filter structure of any embodiment of the present application, thereby having all the technical effects brought about by the technical solutions of the above embodiments.

[0174] Example 6

[0175] like Figure 10 As shown, an oxygen concentrator includes the filter structure 1 of any embodiment of the present application, and thus has all the technical effects brought by the technical solutions of the above embodiments.

[0176] like Figure 10 As shown, in some embodiments, the oxygen concentrator includes a primary filter 2 disposed on a housing 10 .

[0177] By setting up a first-level filter 2 to filter larger impurities, large foreign objects are prevented from entering the oxygen concentrator; a two-stage filtration is formed by the first-level filter 2 and the filter structure 1. The airflow first passes through the first-level filter 2 to filter larger impurities, and then passes through the filter structure 1 to filter dust and other impurities, thereby effectively improving the filtering effect.

[0178] like Figure 11 、 Figure 12 As shown, in some embodiments, the shell 10 is recessed inward to form a filter portion 80; the first-stage filter 2 includes a sealing plate 830 and a first filter element 840, the sealing plate 830 is detachably disposed at one end of the filter portion 80, and the sealing plate 830 and the filter portion 80 together form a cavity; the first filter element 840 is detachably disposed in the cavity, and the first filter element 840 is located on the side of the cavity away from the sealing plate 830.

[0179] It should be noted that the filter portion 80 is located below the mounting portion 20 .

[0180] It should be noted that the sealing plate 830 includes but is not limited to being detachably connected to the filter portion 80 by means of a snap 2103; the first filter element 840 includes but is not limited to being detachably connected to the filter portion 80 by means of a snap connection.

[0181] It should also be noted that the first filter element 840 includes but is not limited to filter cotton.

[0182] It should also be noted that if Figure 11 、 Figure 12 As shown, the filter portion 80 includes an annular plate 810 and a bottom plate 820 connected to the annular plate 810, and a plurality of air outlet grids 8201 are arranged on the bottom plate 820; a gap 850 is arranged between the sealing plate 830 and the filter portion 80; the first filter element 840 is in contact with the bottom plate 820, and there is a preset distance between the first filter element 840 and the sealing plate 830 to form a flow channel 860; wherein, the air outlet grid 8201, the gap 850 and the flow channel 860 together form a primary gas channel.

[0183] like Figure 11 As shown, the air flow enters from the gap 850, flows into the first filter element 840 through the flow channel 860, and flows out from the air outlet grid 8201 after being filtered by the first filter element 840, completing the first filtration in the primary filter 2; the filtered air flow enters from the second air inlet grille 2105, flows into the first air inlet grille 3201 after being filtered by the filter element 40, and then flows out through the air outlet pipe 240, completing the secondary filtration in the filter structure 1.

[0184] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more. In the description of the present invention, a first feature "above" or "below" a second feature may include the first and second features being in direct contact, or the first and second features not being in direct contact but being in contact through another feature between them.

[0185] In the description of the present invention, “on”, “above” and “above” a first feature of a second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0186] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0187] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0188] While the present invention has been described with reference to preferred embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, the various technical features described in the various embodiments may be combined in any manner, provided no structural conflicts exist. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A filtering structure, characterized in that: include: a housing, the housing being recessed inwardly to form a mounting portion; a cover plate, detachably disposed on the mounting portion, the cover plate blocking one end of the mounting portion; as well as a filter element, detachably disposed between the cover plate and the mounting portion; The mounting portion includes a side wall and a bottom wall connected to the side wall; The cover plate includes a closing portion and an inserting portion, an annular spacing is formed between the inserting portion and the side wall, and the filter element is located between the mounting portion and the inserting portion; There is a gap between the filter element and the side wall, and a cavity is formed inside the insertion portion; At least one first air inlet grille is provided on the insertion portion, at least one second air inlet grille is provided on the side wall, and an air outlet pipe is provided on the bottom wall, and the air outlet pipe extends into the cavity; The inserting portion surrounds the air outlet pipe, and the first air intake grille, the gap, the second air intake grille, the cavity and the air outlet pipe together form an air flow channel.

2. The filter structure according to claim 1, characterized in that: The side wall is detachably connected to the cover plate.

3. The filter structure according to claim 2, characterized in that: The side wall is provided with a first hole segment and a second hole segment connected to the first hole segment, the inner diameter of the first hole segment is smaller than the inner diameter of the second hole segment to form a step surface, wherein a buckle is provided on the inner wall of the second hole segment.

4. The filtering structure according to claim 3, characterized in that: The closing portion abuts against the step surface; and The inserting portion has one end provided on the closing portion; Wherein, the closing portion is provided with a slot that matches the buckle.

5. The filtering structure according to claim 4, characterized in that: The card slot includes: a limiting section, provided on the closing portion, the limiting section extending along the circumference of the closing portion; and A transition section is provided on the closing portion, and extends along the axial direction of the closing portion. One end of the transition section is connected to the limiting section, and the other end extends to an end of the closing portion close to the insertion portion.

6. The filter structure according to claim 4, characterized in that: A limiting platform is provided on the bottom wall, and a limiting groove is provided on the limiting platform; wherein, one end of the inserting portion away from the closing portion is inserted into the limiting groove, and the inner wall of the filter element abuts against the outer wall of the limiting platform.

7. The filter structure according to any one of claims 4 to 6, characterized in that: A plurality of support bars cooperating with the filter element are provided on the outer wall of the insertion portion, the support bars are arranged at intervals around the insertion portion, and the support bars extend along the axial direction of the insertion portion; The support bar has an inclined surface on one side away from the insertion portion, and in the radial direction of the insertion portion, the length of the support bar at one end close to the closing portion is greater than the length of the support bar at one end away from the closing portion.

8. The filter structure according to any one of claims 4 to 6, characterized in that: One end of the air outlet pipe extends into the first hole segment and extends along the axial direction of the first hole segment.

9. The filter structure according to any one of claims 1 to 6, characterized in that: The filtering structure includes a sealing member, which is arranged between the mounting portion and the cover plate, wherein a sealing groove for accommodating the sealing member is provided on the mounting portion.

10. An oxygen concentrator, characterized in that: The filter comprises the filter structure according to any one of claims 1 to 9.

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