Air inlet structure of oxygen generator and oxygen generator

Abstract

The utility model discloses an oxygen generator air inlet structure and an oxygen generator, and the oxygen generator air inlet structure comprises an air inlet groove arranged on an outer shell of the oxygen generator; the air inlet cover covers the open end of the air inlet groove; the air inlet cavity is defined by the air inlet groove and the air inlet cover; the first filtering piece is arranged in the air inlet cavity; a first air inlet used for leading in external air is formed between the air inlet cover and the groove wall of the air inlet groove in a surrounding mode. And an opening through which gas in the gas inlet cavity flows out is formed in the groove bottom of the gas inlet groove. The air inlet groove and the air inlet cover are arranged, so that a hidden air inlet structure is formed, and the appearance quality of the oxygen generator can be improved; and the air inlet structure is directly arranged in the shell, so that the structure is compact, the occupied space is reduced, and the market competitiveness is improved. The first filtering piece is arranged in the air inlet cavity and used for filtering air flowing in from the outside, dust and other impurities carried in the air are prevented from entering the shell, and the cleanliness of airflow entering the shell is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of oxygen concentrators, and particularly relates to an air inlet structure of an oxygen concentrator. Background Art

[0002] An oxygen concentrator is a device that extracts oxygen from the air. It's primarily used in the medical field, providing high-purity oxygen to patients requiring additional oxygen. Molecular sieve oxygen concentrators are currently the most commonly used. Two molecular sieves undergo the same cycle, achieving continuous air supply. The process works as follows: Raw air is pressurized by a compressor. The treated compressed air then enters the molecular sieve through an inlet valve. Nitrogen, carbon dioxide, and other gases are adsorbed within the molecular sieve, and the resulting gas is high-purity oxygen.

[0003] Patent CN201120181106.8 discloses a split-type oxygen concentrator air intake filter and oxygen concentrator. The filter comprises an upper housing and a lower housing, the upper and lower housings being assembled together to form a filter cavity, within which a filter device is disposed. The lower housing has an airway port for connecting to an air pipe on its outer wall, and an air intake is located above the upper housing. The oxygen concentrator air intake filter is externally mounted on the concentrator, making it easy to assemble and disassemble and producing low airburst noise. The filter utilizes a multi-layered filter device for effective filtration.

[0004] In the above patent, the oxygen concentrator air inlet filter is external, which will increase the overall volume of the oxygen concentrator and is not conducive to the compactness of the structure; and the grille structure at the air inlet 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 technology is only used to increase the understanding of the background technology of this application. Therefore, it may contain information that does not constitute the prior art known to ordinary technicians in this field. Summary of the Invention

[0006] In response to the above-mentioned problems in the prior art, the utility model proposes an air inlet structure for an oxygen concentrator. By arranging an air inlet groove and an air inlet cover, a hidden air inlet structure is formed, which is beneficial to improving the appearance quality of the oxygen concentrator. In addition, the air inlet structure is directly arranged in the shell, which is beneficial to a compact structure, reduces space occupancy, and improves market competitiveness.

[0007] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical solutions:

[0008] An air inlet structure of an oxygen concentrator, which is connected to the air inlet end of a compressor, comprises:

[0009] an air intake groove provided on the housing of the oxygen concentrator;

[0010] an air intake cover, which is arranged at the open end of the air intake groove;

[0011] An air intake cavity, which is formed by the air intake groove and the air intake cover;

[0012] a first filter element, which is arranged in the air inlet cavity;

[0013] A first air inlet for introducing outside air is formed between the air inlet cover and the wall of the air inlet groove; and an opening for letting the gas in the air inlet cavity flow out is provided at the bottom of the air inlet groove.

[0014] In some embodiments of the present application, a projection of the opening on the air intake cover is spaced apart from the first air intake.

[0015] In some embodiments of the present application, a mounting frame is provided in the opening, and the mounting frame is arranged to form a second air inlet. A guide rib extending toward the first filter element is provided at one end of the mounting frame close to the first air inlet, for preventing the airflow from entering the second air inlet from the gap between the first filter element and the mounting frame.

[0016] In some embodiments of the present application, the guide rib rests on the first filter element, and the guide rib extends in an arc shape in a direction close to the first filter element toward a direction away from the first air inlet, and the guide rib is an outwardly convex arc-shaped plate rib structure.

[0017] In some embodiments of the present application, the air inlet cover has a cover body and a limiting rib extending inward along the cover body, the limiting rib is used to limit the movement of the first filter element toward the first air inlet, and the limiting rib is located between the first air inlet and the guide rib.

[0018] In some embodiments of the present application, the air intake cover further has a cover edge extending inward along the edge of the cover body, the cover edge and the limiting ribs are arranged around the outside of the first filter element, and the cover edge is snap-fitted and fixed to the groove wall of the air intake groove.

[0019] In some embodiments of the present application, the inward extension dimension of the cover edge is matched with the depth of the air inlet groove, and the inner end of the cover edge abuts against the bottom of the air inlet groove.

[0020] In some embodiments of the present application, the air inlet cover has a cover body that matches the open end of the air inlet groove, a notch is opened on the cover body, and a first air inlet is formed between the notch and the groove wall of the air inlet groove.

[0021] In some embodiments of the present application, the slot is provided at the lower end of the cover body, and the horizontal plane where the upper end of the slot is located is lower than the second air inlet.

[0022] In some embodiments of the present application, a second filter element is provided in the installation frame, and the filtering accuracy of the second filter element is greater than the filtering accuracy of the first filter element.

[0023] Based on the above-mentioned air inlet structure of an oxygen concentrator, the present application also provides an oxygen concentrator having the above-mentioned air inlet structure. By setting an air inlet groove and an air inlet cover, a hidden air inlet structure is formed, which is beneficial to improving the appearance quality of the oxygen concentrator; and the air inlet structure is directly set in the outer shell, which is beneficial to a compact structural setting, reducing space occupancy and improving market competitiveness.

[0024] An oxygen concentrator has the above-mentioned air inlet structure.

[0025] Compared with the existing technology, the advantages and positive effects of this utility model are as follows: by providing an air intake groove and an air intake cover, a concealed air intake structure is formed, which helps improve the appearance quality of the oxygen concentrator; the air intake structure is directly located within the housing, which facilitates a compact structure, reduces space occupation, and improves market competitiveness. A first filter element is provided within the air intake cavity to filter the air flowing in from the outside, reducing the amount of dust and other impurities carried by the air that enters the housing, thereby ensuring the cleanliness of the airflow entering the housing.

[0026] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, a brief introduction will be given below to the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 This is a structural schematic diagram of an embodiment of an air inlet structure of an oxygen concentrator proposed by the present utility model;

[0029] Figure 2 for Figure 1 Schematic diagram of the structure of the middle air intake cover in the disassembled state;

[0030] Figure 3 for Figure 2 An enlarged structural diagram of the middle air intake groove;

[0031] Figure 4 for Figure 3 The middle is a schematic diagram of the structure after the installation frame and the second filter element are disassembled;

[0032] Figure 5It is a structural diagram of the mounting frame and the second filter element;

[0033] Figure 6 for Figure 1 Schematic diagram of the structure of the middle air intake cover;

[0034] Figure 7 for Figure 6 A magnified schematic diagram of area B in the middle;

[0035] Figure 8 for Figure 6 Structural diagram from another angle;

[0036] Figure 9 for Figure 1 A schematic cross-sectional view of the structure;

[0037] Figure 10 for Figure 9 An enlarged schematic diagram of the middle air intake groove;

[0038] Among them, oxygen concentrator 100;

[0039] Housing 10; first side wall 11;

[0040] Inlet groove 15; air inlet cavity 150; groove bottom 152; card slot 153; first filter element 156; opening 157;

[0041] Inlet cover 16; first air inlet 161; cover body 162; notch 1621; cover edge 163; claw 1631; limiting rib 164;

[0042] Mounting frame 172 ; second air inlet 173 ; guide rib 174 ; second filter element 177 . DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0044] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", etc. are based on the positional relationships shown in the accompanying drawings, with the direction closer to the center of the component being "inside" and the opposite being "outside". The terms are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0045] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0046] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0047] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but a person of ordinary skill in the art may recognize the application of other processes and / or the use of other materials. Example

[0048] See also Figures 1-10 , is an embodiment of the air inlet structure of an oxygen concentrator proposed by the present invention. An air inlet structure of an oxygen concentrator 100 is connected to the air inlet end of the compressor and is used to provide gas to the compressor. External air enters the oxygen concentrator 100 through the air inlet structure and then enters the compressor to be compressed.

[0049] See also Figure 2 As shown, an air inlet structure of an oxygen concentrator 100 includes an air inlet groove 15, an air inlet cover 16 and a first filter element 156. The air inlet groove 15 is provided on the housing 10 of the oxygen concentrator 100 and is formed as a concave portion of the side wall of the housing 10; the air inlet cover 16 is a detachable cover provided on the open end of the air inlet groove 15. The housing 10 is a square housing having four side walls, and the air inlet groove 15 is defined on the first side wall 11. The first side wall 11 can be a rear wall, a left side wall, or a front wall. In this embodiment, as shown in FIG. Figure 1 As shown, the first side wall 11 is a rear wall.

[0050] In the present application, the air intake groove 15 and the air intake cover 16 enclose an air intake chamber 150. A first air intake port 161 for introducing outside air is formed between the air intake cover 16 and the groove wall of the air intake groove 15. An opening 157 is provided at the groove bottom 152 of the air intake groove 15 for allowing the gas within the air intake chamber 150 to flow out. A first filter element 156 is provided within the air intake chamber 150 for filtering the gas flowing through it. The provision of the air intake groove 15 and the air intake cover 16 creates a concealed air intake structure, which helps improve the appearance of the oxygen concentrator. Furthermore, the air intake structure is directly disposed within the housing 10, which facilitates a compact structure, reduces space occupancy, and enhances market competitiveness. A first filter element 156 is provided within the air intake chamber 150 for filtering the air flowing in from the outside, reducing the amount of dust and other impurities carried in the air that enters the housing, and ensuring the cleanliness of the airflow entering the housing 10. External air enters the air inlet cavity 150 through the first air inlet 161. The first air inlet 161 is arranged near the groove wall, so that the air flow turns and flows toward the opening 157 after entering the air inlet cavity 150, which is beneficial to increase the length of the air path in the air inlet cavity 150 and increase the bends of the air path, which can reduce noise.

[0051] In some embodiments of this application, see Figure 9 As shown, the projection of the opening 157 on the air inlet cover 16 is spaced apart from the first air inlet 161. From the outside, only the first air inlet 161 can be seen, and the opening 157 cannot be seen from the first air inlet 161, thereby ensuring the appearance quality and forming a hidden air inlet structure.

[0052] In some embodiments of this application, see Figure 3-Figure 5As shown, a mounting frame 172 is provided within the opening 157, and the mounting frame 172 surrounds and forms a second air inlet 173. An outwardly extending guide rib 174 is provided at one end of the mounting frame 172 near the first air inlet 161. The guide rib 174 is used to prevent airflow from entering the second air inlet 173 through the gap between the first filter element 156 and the mounting frame 172. The guide rib 174 is provided to guide the airflow entering from the first air inlet 161 into the first filter element 156 for filtration, thereby ensuring the quality of the gas flowing into the second air inlet 173. Preferably, the guide rib 174 abuts against the first filter element 156 and extends in a direction toward the first filter element 156. The guide rib 174 not only guides the airflow, but also serves to limit the first filter element 156, preventing it from moving inward.

[0053] In some embodiments of this application, see Figure 5 and Figure 10 As shown, guide rib 174 extends in an arc shape from near the first filter element 156 toward the direction away from the first air inlet 161. Guide rib 174 is an outwardly convex curved plate rib structure. The curved shape of guide rib 174 facilitates smooth air flow and reduces wind resistance. When air enters the first air inlet 161 and reaches the air inlet cavity 150, some of the air directly enters the first filter element 156, while some of the air impacts the guide rib 174. The air then flows along the guide rib 174 and enters the first filter element 156.

[0054] In some embodiments of this application, see Figures 6-10 As shown, the air inlet cover 16 comprises a cover body 162 and a limiting rib 164 extending inwardly from the cover body 162. The limiting rib 164 is used to limit the movement of the first filter element 156 toward the first air inlet 161. The limiting rib 164 is located between the first air inlet 161 and the guide rib 174. The provision of the limiting rib 164 ensures that the outside air entering from the first air inlet 161 is blocked by the limiting rib 164, causing more airflow in the air inlet cavity 150 to impact the guide rib 174, forming a bend in the airflow within the air inlet cavity 150. This helps to extend the air path, increase the path length of the airflow within the first filter element 156, and improve the filtering effect.

[0055] In some embodiments of the present application, the air intake cover 16 further includes a cover edge 163 extending inwardly along the edge of the cover body 162. The cover edge 163 and the limiting ribs 164 surround the outside of the first filter element 156. That is, the cover edge 163 and the limiting ribs 164 surround the air intake filter element 156 to restrict the air intake filter element 156. The outside of the first filter element 156 is defined as the direction close to the center of the first filter element 156. The first filter element 156 is formed with the cover body 162 at the rear, the guide ribs 174 at the front, and the cover edge 163 and the limiting ribs 164 around it, thereby restricting the first filter element 156 and confining it within the air intake cavity 150.

[0056] In some embodiments of the present application, a removable air intake cover 16 is disposed within the air intake groove 15. A snap-fit ​​structure is provided between the air intake cover 16 and the air intake groove 15, allowing the air intake cover 16 to be snap-fitted and secured within the air intake groove 15, facilitating assembly and disassembly of the air intake cover 16. A snap-fitting groove 153 is provided on the sidewall of the air intake groove 15, and a claw 1631 is provided on the cover edge 163 to mate with the snap-fitting groove 153. When the air intake cover 16 is installed inwardly within the air intake groove 15, the claw 1631 snaps into place with the snap-fitting groove 153.

[0057] In some embodiments of the present application, the inward extension dimension of the cover edge 163 is matched with the depth of the air intake groove 15, and the inner end of the cover edge 163 rests on the bottom 152 of the air intake groove 15; this is conducive to achieving the limitation of the installation of the cover edge 163 in place, without the need to specially set a limiting structure, which is conducive to the simplification of the structure; and it is conducive to increasing the contact area between the cover edge 163 and the air intake groove 15, thereby increasing the stability after installation.

[0058] In some embodiments of the present application, the air inlet cover 16 includes a cover body 162 that matches the open end of the air inlet groove 15, and a notch 1621 is formed on the edge of the cover body 162. The notch 1621 and the groove wall of the air inlet groove 15 form a first air inlet 161. Providing the notch 1621 to form the first air inlet ensures that the cover body 162 matches the open end of the air inlet groove 15, facilitates the manufacturing and forming of the notch 1621, and simplifies the process.

[0059] In this embodiment, a notch 1621 is provided at the lower end of the cover 162, and the upper end of the notch 1621 is located at a level lower than the opening 157, ensuring that the opening 157 cannot be seen from the outside. In other embodiments, the notch 1621 can also be provided at other locations on the cover 162.

[0060] In some embodiments of the present application, a second filter element 177 is provided in the mounting frame 172. The filtering accuracy of the second filter element 177 is greater than that of the first filter element 157. The airflow flowing out of the air inlet groove 15 enters the second filter element 177 for further filtration. Example

[0061] See also Figures 1-10 , is an embodiment of an oxygen concentrator proposed by the present invention, an oxygen concentrator 100, having the above-mentioned air inlet structure, has a compact structure, reduces space occupancy, and improves market competitiveness.

[0062] In this embodiment, an air inlet structure of an oxygen concentrator 100 includes an air inlet groove 15, an air inlet cover 16, and a first filter element 156. The air inlet groove 15 is provided on the housing 10 of the oxygen concentrator 100 and is formed as a concave portion of the side wall of the housing 10; the air inlet cover 16 is a detachable cover provided on the open end of the air inlet groove 15. The housing 10 is a square housing having four side walls, and the air inlet groove 15 is defined as being provided on the first side wall 11. The first side wall 11 may be a rear wall, a left side wall, or a front wall. In this embodiment, as Figure 1 As shown, the first side wall 11 is a rear wall.

[0063] In the present application, the air intake groove 15 and the air intake cover 16 enclose an air intake chamber 150. A first air intake port 161 for introducing outside air is formed between the air intake cover 16 and the groove wall of the air intake groove 15. An opening 157 is provided at the groove bottom 152 of the air intake groove 15 for allowing the gas within the air intake chamber 150 to flow out. A first filter element 156 is provided within the air intake chamber 150 for filtering the gas flowing through it. The provision of the air intake groove 15 and the air intake cover 16 creates a concealed air intake structure, which helps improve the appearance of the oxygen concentrator. Furthermore, the air intake structure is directly disposed within the housing 10, which facilitates a compact structure, reduces space occupancy, and enhances market competitiveness. A first filter element 156 is provided within the air intake chamber 150 for filtering the air flowing in from the outside, reducing the amount of dust and other impurities carried in the air that enters the housing, and ensuring the cleanliness of the airflow entering the housing 10. External air enters the air inlet cavity 150 through the first air inlet 161. The first air inlet 161 is arranged near the groove wall, so that the air flow turns and flows toward the opening 157 after entering the air inlet cavity 150, which is beneficial to increase the length of the air path in the air inlet cavity 150 and increase the bends of the air path, which can reduce noise.

[0064] In some embodiments of the present application, the projection of the opening 157 on the air inlet cover 16 is spaced apart from the first air inlet 161. From the outside, only the first air inlet 161 is visible, and the opening 157 is not visible when looking inward from the first air inlet 161, thereby ensuring the appearance quality and forming a hidden air inlet structure.

[0065] In some embodiments of the present application, a mounting frame 172 is provided within the opening 157, enclosing a second air inlet 173. An outwardly extending guide rib 174 is provided at one end of the mounting frame 172 near the first air inlet 161. The guide rib 174 is used to prevent airflow from entering the second air inlet 173 through the gap between the first filter element 156 and the mounting frame 172. The guide rib 174 is configured to guide airflow entering from the first air inlet 161 into the first filter element 156 for filtration, thereby ensuring the quality of the air flowing into the second air inlet 173. Preferably, the guide rib 174 abuts against the first filter element 156 and extends toward the first filter element 156. The guide rib 174 not only guides the airflow but also serves to limit the first filter element 156, preventing it from moving inward.

[0066] In some embodiments of the present application, guide ribs 174 extend in an arc shape from near the first filter element 156 toward the first air inlet 161. Guide ribs 174 are outwardly convex curved plate ribs. The curved shape of guide ribs 174 facilitates smooth air flow and reduces wind resistance. When air enters the first air inlet 161 and reaches the air inlet cavity 150, some of the air directly enters the first filter element 156, while some of the air impacts the guide ribs 174. The air then flows along the guide ribs 174 and enters the first filter element 156.

[0067] In some embodiments of the present application, the air inlet cover 16 comprises a cover body 162 and a limiting rib 164 extending inwardly from the cover body 162. The limiting rib 164 is used to limit the movement of the first filter element 156 toward the first air inlet 161. The limiting rib 164 is located between the first air inlet 161 and the guide rib 174. The provision of the limiting rib 164 ensures that the outside air entering from the first air inlet 161 is blocked by the limiting rib 164, causing more airflow in the air inlet cavity 150 to impact the guide rib 174, forming a bend in the airflow within the air inlet cavity 150, which helps to extend the air path, increase the path length of the airflow within the first filter element 156, and improve the filtering effect.

[0068] In some embodiments of the present application, the air intake cover 16 further includes a cover edge 163 extending inwardly along the edge of the cover body 162. The cover edge 163 and the limiting ribs 164 surround the outside of the first filter element 156. That is, the cover edge 163 and the limiting ribs 164 surround the air intake filter element 156 to restrict the air intake filter element 156. The outside of the first filter element 156 is defined as the direction close to the center of the first filter element 156. The first filter element 156 is formed with the cover body 162 at the rear, the guide ribs 174 at the front, and the cover edge 163 and the limiting ribs 164 around it, thereby restricting the first filter element 156 and confining it within the air intake cavity 150.

[0069] In some embodiments of the present application, a removable air intake cover 16 is disposed within the air intake groove 15. A snap-fit ​​structure is provided between the air intake cover 16 and the air intake groove 15, allowing the air intake cover 16 to be snap-fitted and secured within the air intake groove 15, facilitating assembly and disassembly of the air intake cover 16. A snap-fitting groove 153 is provided on the sidewall of the air intake groove 15, and a claw 1631 is provided on the cover edge 163 to mate with the snap-fitting groove 153. When the air intake cover 16 is installed inwardly within the air intake groove 15, the claw 1631 snaps into place with the snap-fitting groove 153.

[0070] In some embodiments of the present application, the inward extension dimension of the cover edge 163 is matched with the depth of the air intake groove 15, and the inner end of the cover edge 163 rests on the bottom 152 of the air intake groove 15; this is conducive to achieving the limitation of the installation of the cover edge 163 in place, without the need to specially set a limiting structure, which is conducive to the simplification of the structure; and it is conducive to increasing the contact area between the cover edge 163 and the air intake groove 15, thereby increasing the stability after installation.

[0071] In some embodiments of the present application, the air inlet cover 16 includes a cover body 162 that matches the open end of the air inlet groove 15, and a notch 1621 is formed on the edge of the cover body 162. The notch 1621 and the groove wall of the air inlet groove 15 form a first air inlet 161. Providing the notch 1621 to form the first air inlet ensures that the cover body 162 matches the open end of the air inlet groove 15, facilitates the manufacturing and forming of the notch 1621, and simplifies the process.

[0072] In this embodiment, a notch 1621 is provided at the lower end of the cover 162, and the upper end of the notch 1621 is located at a level lower than the opening 157, ensuring that the opening 157 cannot be seen from the outside. In other embodiments, the notch 1621 can also be provided at other locations on the cover 162.

[0073] In some embodiments of the present application, a second filter element 177 is provided in the mounting frame 172. The filtering accuracy of the second filter element 177 is greater than that of the first filter element 157. The airflow flowing out of the air inlet groove 15 enters the second filter element 177 for further filtration.

[0074] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. An oxygen concentrator air inlet structure for providing gas to a compressor, characterized in that: include: an air intake groove provided on the housing of the oxygen concentrator; an air intake cover, which is arranged at the open end of the air intake groove; An air intake cavity, which is formed by the air intake groove and the air intake cover; a first filter element, which is arranged in the air inlet cavity; A first air inlet for introducing outside air is formed between the air inlet cover and the wall of the air inlet groove; and an opening for letting the gas in the air inlet cavity flow out is provided at the bottom of the air inlet groove.

2. The air inlet structure according to claim 1, characterized in that: The projection of the opening on the air intake cover is spaced apart from the first air intake.

3. The air inlet structure according to claim 1, characterized in that: A mounting frame is provided in the opening, and the mounting frame is arranged to form a second air inlet. A guide rib extending toward the first filter element is provided at one end of the mounting frame close to the first air inlet, for preventing airflow from entering the second air inlet from the gap between the first filter element and the mounting frame.

4. The air inlet structure according to claim 3, characterized in that: The guide rib rests against the first filter element, and the guide rib extends in an arc shape in a direction close to the first filter element and away from the first air inlet. The guide rib is an outwardly convex arc-shaped plate rib structure.

5. The air inlet structure according to claim 3, characterized in that: The air inlet cover comprises a cover body and a limiting rib extending inwardly along the cover body. The limiting rib is used to limit the first filter element from moving toward the first air inlet. The limiting rib is located between the first air inlet and the guide rib.

6. The air inlet structure according to claim 5, characterized in that: The air inlet cover has a cover edge extending inwardly along the edge of the cover body. The cover edge and the limiting ribs are arranged around the outside of the first filter element. The cover edge is snap-fitted and fixed to the groove wall of the air inlet groove.

7. The air inlet structure according to claim 6, characterized in that: The inward extension dimension of the cover edge is matched with the depth of the air inlet groove, and the inner end of the cover edge abuts against the bottom of the air inlet groove.

8. The air inlet structure according to any one of claims 3 to 7, characterized in that: The air inlet cover comprises a cover body matched with the open end of the air inlet groove, a notch is opened on the cover body, and a first air inlet is formed between the notch and the groove wall of the air inlet groove.

9. The air inlet structure according to any one of claims 3 to 7, characterized in that: A second filter element is provided in the installation frame, and the filtering accuracy of the second filter element is greater than the filtering accuracy of the first filter element.

10. An oxygen concentrator, characterized in that: The air inlet structure according to any one of claims 1 to 9 is provided.

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