Air inlet module of oxygen generator and oxygen generator

Abstract

The invention discloses an oxygen generator air inlet module and an oxygen generator, the oxygen generator air inlet module comprises: an air inlet cavity formed by a housing of the oxygen generator in a recessed manner; the mounting cavity is formed by being concaved inwards along the cavity wall opposite to the open end of the air inlet cavity; the filtering cavity is detachably positioned in the mounting cavity; the air inlet pipe head is communicated with an air inlet of the compressor and extends into the mounting cavity; the air inlet pipe head is connected with the filtering cavity, a first filtering piece is arranged in the air inlet cavity, and a second filtering piece is arranged in the filtering cavity. The air inlet module is arranged in the oxygen generator, so that the structure is compact, the occupied space is reduced, and the market competitiveness is improved; the filter cavity is detachable, so that the whole filter cavity can be replaced, and the replacement efficiency can be improved. The first filtering part and the second filtering part are arranged, so that the filtering precision is improved; and the gas inlet cavity and the filtering cavity are arranged, so that the first filtering piece and the second filtering piece are located in the two cavities respectively, one filtering piece can be replaced according to needs, and gas distribution can be achieved according to needs.

Description

Technical Field

[0001] The present invention belongs to the technical field of oxygen concentrators, and in particular relates to an air intake module of an oxygen concentrator, and an oxygen concentrator having the air intake module. Background Art

[0002] An oxygen concentrator is a device that can extract oxygen from the air. It is mainly used in the medical field to provide high-purity oxygen for patients who need additional oxygen. Molecular sieve oxygen concentrators are currently more commonly used. Two molecular sieves perform the same cycle process respectively, thereby achieving continuous gas supply. The working process is: the raw air is pressurized by the compressor, and then the treated compressed air enters the molecular sieve through the intake valve. Nitrogen, carbon dioxide, etc. are adsorbed in the molecular sieve, and the outflowing gas is high-purity oxygen.

[0003] Patent CN201120181106.88 discloses a split oxygen concentrator air intake filter and an oxygen concentrator, the filter comprising: an upper shell and a lower shell, the upper shell and the lower shell are assembled together to form a filter cavity, a filter device is arranged in the filter cavity, a trachea port for connecting a trachea is arranged on the outer wall of the lower shell, and an air inlet is arranged above the upper shell. The oxygen concentrator air intake filter is externally mounted on the oxygen concentrator, which is easy to disassemble and assemble and has low air burst noise; filtering is performed through a multi-layer filtering device, and the filtering effect is good.

[0004] In the above patent, the oxygen concentrator air inlet filter is external, which will increase the overall volume of the oxygen concentrator, which 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 the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0006] In view of the above-mentioned problems in the prior art, the present invention proposes an air intake module for an oxygen concentrator, which is arranged in the oxygen concentrator, which is conducive to compact structure, reduces space occupancy, and improves market competitiveness; the filter chamber is detachable, so that the filter chamber can be replaced as a whole, which is conducive to improving replacement efficiency.

[0007] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: An air intake module of an oxygen concentrator, comprising: An air inlet cavity, which is formed by a recess in the outer shell of the oxygen concentrator; A mounting cavity formed concavely along a cavity wall opposite to the open end of the air inlet cavity; a filter chamber, which is detachably located in the mounting chamber; An air inlet pipe head, which is communicated with the air inlet of the compressor and extends into the installation cavity; The air inlet pipe head is connected to the filter cavity, a first filter element is arranged in the air inlet cavity, and a second filter element is arranged in the filter cavity.

[0008] In some embodiments of the present application, the air intake pipe head has a pipe head portion and a joint portion bent along the upper end of the pipe head portion and extending toward the open end of the installation cavity; when the filter cavity is installed inwardly into the installation cavity, the filter cavity and the joint portion can be installed simultaneously.

[0009] In some embodiments of the present application, a heat dissipation vent is provided at the bottom of the air inlet cavity for heat dissipation airflow to pass through; outside air enters the air inlet cavity and passes through the first filter element; then part of the gas flows into the filter cavity and enters the oxygen production and supply air path; the other part of the gas flows into the heat dissipation vent and enters the heat dissipation flow path.

[0010] In some embodiments of the present application, a detachable air inlet cover is further included on the open end of the air inlet cavity, and a first air inlet for introducing outside air is formed between the air inlet cover and the cavity wall of the air inlet cavity.

[0011] In some embodiments of the present application, the projection of the first air inlet on the bottom of the air inlet cavity is spaced apart from the filter cavity and the heat dissipation vent to form a hidden air inlet structure.

[0012] In some embodiments of the present application, the air inlet cover has a cover body that matches the open end of the air inlet cavity, a notch is formed on the cover body, and a first air inlet is formed between the notch and the cavity wall of the air inlet cavity.

[0013] In some embodiments of the present application, the air inlet cover also has a cover edge extending inward along the edge of the cover body and a limiting rib extending inward along the cover body. The cover edge and the limiting rib are arranged around the outside of the first filter element, and the cover edge is snap-fitted and fixed to the cavity wall of the air inlet cavity.

[0014] In some embodiments of the present application, the filter cavity is provided with a guide rib extending outward and directing the airflow into the first filter element, thereby preventing the airflow from entering the filter cavity through the gap between the first filter element and the filter cavity.

[0015] In some embodiments of the present application, the guide rib abuts against the first filter element, and the guide rib is extended in an arc shape in an outward direction away from the first air inlet, and the guide rib is an outwardly convex arc-shaped plate rib structure.

[0016] In some embodiments of the present application, the air intake cover has a cover body and a limiting rib extending inwardly along the cover body, the limiting rib is used to limit the movement of the first filter element toward the heat dissipation outlet, and the limiting rib is located between the heat dissipation outlet and the guide rib.

[0017] In some embodiments of the present application, the extension dimension of the cover edge is matched with the depth of the air inlet cavity, and the inner end of the cover edge abuts against the bottom of the air inlet cavity.

[0018] In some embodiments of the present application, the cavity wall of the filter cavity is concave to form an avoidance groove for avoiding the air inlet pipe head, the air inlet pipe head extends into the avoidance groove, and an air outlet hole matching the joint part is penetrated on the groove wall of the avoidance groove.

[0019] In some embodiments of the main body application, an air outlet nozzle extending toward the air inlet pipe head of the avoidance groove is provided along the air outlet hole, and the air outlet nozzle is sealed and connected to the joint part.

[0020] In some embodiments of the present application, the joint portion is located inside the air outlet nozzle, a circumferential sealing groove is provided on the outer side of the joint portion, and a sealing ring is located at the sealing groove.

[0021] In some embodiments of the main body application, the filter cavity has a first cavity wall arranged opposite to the air inlet end and a second cavity wall connected to the first cavity wall, and the avoidance groove is opened on the first cavity wall and the second cavity wall.

[0022] In some embodiments of the main body application, a support and limit portion is provided in the filter cavity and abuts against the inner side of the second filter element. The support and limit portion is a plurality of spaced support columns extending along the avoidance groove toward the air inlet end, and the second filter element has a plurality of turning portions that can extend into the gap between two adjacent support columns.

[0023] In some embodiments of the main body application, the second filter element is a pleated filter paper structure.

[0024] In some embodiments of the main body application, the filter cavity has a cavity body and a filter frame arranged around the outside of the second filter element; the filter frame is detachably arranged on the cavity body, and the outer end of the filter frame is provided with an outer rib for limiting the second filter element; the outer rib is arranged to form a second air inlet, and the airflow in the air inlet cavity enters the filter cavity through the second air inlet.

[0025] In some embodiments of the main body application, the filter cavity has a first cavity wall arranged opposite to the air inlet end, and the avoidance groove has a first groove wall with an air outlet, a second groove wall and a third groove wall located between the first groove wall and the first cavity wall and arranged in parallel.

[0026] In some embodiments of the main body application, the filter cavity has a main air intake area located between the first slot wall and the air intake end, and a second air intake area and a third air intake area located on both sides of the main air intake area.

[0027] Based on the above-mentioned air intake module of an oxygen concentrator, the present application also provides an oxygen concentrator having the above-mentioned air intake module. The air intake module is arranged in the oxygen concentrator, which is conducive to compact structure, reduces space occupancy, and improves market competitiveness; the filter chamber is arranged to be detachable, and the filter chamber can be replaced as a whole, which is conducive to improving replacement efficiency.

[0028] An oxygen concentrator comprises the air intake module mentioned above.

[0029] Compared with the prior art, the advantages and positive effects of the present invention are: the air intake module is arranged in the oxygen concentrator, which is conducive to compact structure, reduces space occupation, and improves market competitiveness; the filter chamber is arranged to be detachable, so that the filter chamber can be replaced as a whole, which is conducive to improving replacement efficiency. The first filter element and the second filter element are arranged to improve the filtering accuracy; and the air intake chamber and the filter chamber are arranged so that the first filter element and the second filter element are respectively located in the two chambers, so that one filter element can be replaced as needed, and the other is to achieve gas diversion as needed.

[0030] 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

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces 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 creative work.

[0032] Figure 1 This is a structural schematic diagram of an embodiment of an air intake module of an oxygen concentrator proposed by the present invention; Figure 2 for Figure 1 A schematic diagram of the structure of the middle air intake cover in a disassembled state; Figure 3 for Figure 2 An enlarged structural diagram of the middle air intake cavity; Figure 4 for Figure 3 The schematic diagram of the structure after the filter chamber is disassembled; Figure 5 for Figure 2 Schematic diagram of the structure of the middle air intake cover; Figure 6 for Figure 5A magnified schematic diagram of the middle A area; Figure 7 for Figure 7 A schematic diagram of the structure from another angle; Figure 8 for Figure 1 A schematic cross-sectional view of the structure; Fig. 9 for Figure 8 A magnified schematic diagram of the middle B area; Fig.10 It is a structural schematic diagram of the filter chamber; Fig.11 for Fig.10 A schematic diagram of the structure from another angle; Fig.12 for Fig.10 Schematic diagram of the explosion structure; Fig.13 It is a structural schematic diagram of the filter chamber and the intake pipe head in the installed state; Fig.14 13 is a cross-sectional structural schematic diagram; Fig.15 for Figure 1 The schematic diagram of the structure after the outer shell is removed; Fig.16 for Fig.15 Schematic diagram of the enlarged structure of the middle C region; Fig.17 It is a schematic diagram of the structure behind the shell; Fig.18 for Fig.17 An enlarged structural diagram of the middle mounting slot; Fig.19 for Figure 1 Another cross-sectional structural schematic diagram of; Fig. 20 for Fig.19 An enlarged schematic diagram of the middle air inlet cavity; Fig.21 for Fig. 20 A magnified schematic diagram of the middle D area; Among them, oxygen concentrator 100; Housing 10; first side wall 11; Inlet cavity 15; cavity bottom 152; card slot 153; heat dissipation vent 155; air inlet side 1551; air outlet side 1552; arc-shaped vent surface 1553; first filter element 156; Inlet cover 16; first air inlet 161; cover body 162; notch 1621; cover edge 163; claw 1631; limiting rib 164; Filter cavity 17; cavity body 170; first cavity wall 171; second cavity wall 172; second air inlet 173; guide rib 174; avoidance groove 175; first groove wall 1751; air outlet 17511; air outlet nozzle 17512; second groove wall 1752; third groove wall 1753; support and limit portion 176; support column 1761; second filter element 177; turning portion 1771; filter frame 178; outer retaining edge 1781; Installation cavity 18; first groove wall 181; second groove wall 182; first avoidance opening 1811; installation groove 1812; limiting groove 1813; Equipment cavity 20; top plate 23; reserved opening 231; supporting edge 232; Compressor chamber 30; compressor 35; intake pipe 37; Inlet pipe head 36; pipe head portion 361; joint portion 362; mounting plate 363; limiting column 364; first connecting portion 365; second connecting portion 366. DETAILED DESCRIPTION

[0033] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0034] 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 oxygen concentrator being "inside", and the opposite being "outside". The terms 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting 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 the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.

[0038] See also Figure 1-Figure 21 , an embodiment of an air intake module of an oxygen concentrator proposed by the present invention, the oxygen concentrator 100 has a shell 10, an equipment chamber 20 and a compressor chamber 30 arranged in the shell 10, and the equipment chamber 20 is located on the upper side of the compressor chamber 30. By setting the equipment chamber 20 and the compressor chamber 30, the heat generated by the components in the compressor chamber 30 and the equipment chamber 20 is prevented from being quickly diffused to other areas in the shell of the oxygen concentrator, affecting the normal operation of other components. The air intake module is used to introduce external air into the oxygen concentrator 100, and after filtering, it can be used to supply to the compressor 35, and can also be used for heat dissipation.

[0039] In this embodiment, see Figure 8 and Fig. 9As shown, an air intake module of an oxygen concentrator 100 comprises: an air intake chamber 15, an installation chamber 18, a filter chamber 17, an air intake pipe head 36, a first filter element 156 and a second filter element 177. The first side wall 11 of the housing 10 of the oxygen concentrator 100 is concave to form the air intake chamber 15. The outer end of the air intake chamber 15 is an open end. The installation chamber 18 is formed by concave along the chamber wall opposite to the open end of the air intake chamber 15, that is, the installation chamber 18 is formed by extending along the bottom of the air intake chamber 15 away from the air intake chamber 15. The filter chamber 17 is detachably located in the installation chamber 18, and the installation chamber 18 is used to accommodate the filter chamber 17. The air intake pipe head 36 is connected to the air intake port of the compressor 35, and the air intake pipe head 36 extends into the installation chamber 18; the air intake pipe head 36 is connected to the filter chamber 17, and the first filter element 156 is provided in the air intake chamber 15, and the second filter element 177 is provided in the filter chamber 17. The air intake module is arranged in the oxygen concentrator 100, which is conducive to compact structure, reduces space occupation, and improves market competitiveness; the filter chamber 17 is arranged to be detachable, so that the filter chamber 17 can be replaced as a whole, which is conducive to improving replacement efficiency. The first filter element 156 and the second filter element 177 are arranged to improve the filtering accuracy; and the air intake chamber 15 and the filter chamber 17 are arranged so that the first filter element 156 and the second filter element 177 are respectively located in the two chambers, one is that a filter element can be replaced as needed, and the other is that the gas can be diverted as needed. The filtering accuracy of the second filter element 177 is greater than the filtering accuracy of the first filter element 157, and the airflow flowing out of the air intake chamber 15 enters the second filter element 177 for filtering again.

[0040] In some embodiments of the present application, see Figure 3 As shown, a heat dissipation vent 155 for heat dissipation airflow is provided at the bottom 152 of the air inlet cavity 15; the outside air enters the air inlet cavity 15 and passes through the first filter element 156; then a part of the gas flows into the filter cavity 17, enters the oxygen supply gas path after being filtered by the second filter element 177; the other part of the gas flows into the heat dissipation vent 155 and enters the heat dissipation flow path. That is, the air inlet cavity 15 is shared by the oxygen supply gas path and the heat dissipation flow path, which is conducive to simplifying the structure and reducing the setting of components; secondly, it is conducive to reducing the air inlet on the appearance of the oxygen generator 100 and improving the appearance quality.

[0041] In some embodiments of the present application, see Fig. 9As shown, the air inlet pipe head 36 has a pipe head 361 and a joint portion 362 that is bent along the upper end of the pipe head 361 and extends toward the open end of the installation chamber 18; when the filter chamber 17 is installed inwardly into the installation chamber 18, the installation of the filter chamber 17 and the joint portion 362 can be realized simultaneously. The filter chamber 17 enters the installation chamber 18 inwardly from the open end of the installation chamber 18, and moves inwardly into position to realize installation and fixation. That is, the axial direction of the joint portion 362 is the loading and unloading direction of the filter chamber 17; when the filter chamber 17 is loaded and unloaded, the air inlet pipe head 36 and the filter chamber 17 can be installed or disassembled simultaneously. The detachable setting of the filter chamber 17 allows the filter chamber 17 to be directly replaced when the second filter element needs to be replaced, which is conducive to improving the efficiency of the replacement operation. The axial direction of the joint part 362 is set as the loading and unloading direction of the filter chamber 17, which ensures that when the filter chamber 17 is installed in the installation groove 18, it moves inward along the axial direction of the joint part 362. After the filter chamber 17 is installed in place, the air intake pipe head 36 and the filter chamber 17 can be installed in place synchronously; this saves the installation operation of the air intake pipe head 36 and the filter chamber 17, which is beneficial to the installation efficiency.

[0042] In some embodiments of the present application, see Figure 2-Figure 4 As shown, the air intake module also includes a detachable air intake cover 16 which is arranged on the open end of the air intake cavity 15, and a first air intake port 161 for introducing outside air is formed between the air intake cover 16 and the cavity wall of the air intake cavity 15. By setting the air intake cavity 15 and the air intake cover 16, a hidden air intake port structure is formed, which is beneficial to improving the appearance quality of the oxygen concentrator; and the air intake module is located in the oxygen concentrator 100, which is beneficial to compact structure, reduce space occupation, and improve market competitiveness. A first filter element 156 is arranged in the air intake cavity 15, which is used to filter the air flowing in from the outside, reduce the dust and other impurities carried in the air from entering the shell, and ensure the cleanliness of the air flow entering the shell 10. The outside air enters the air intake cavity 15 through the first air intake port 161, and the first air intake port 161 is arranged near the groove wall, so that the air flow turns and flows in the direction of the heat dissipation vent 155 and the filter cavity 17 after entering the air intake cavity 15, which is beneficial to increase the length of the air path in the air intake cavity 15, and increase the bend of the air path, which can play a role in reducing noise.

[0043] In some embodiments of the present application, the projection of the first air inlet 161 on the bottom of the air inlet cavity 15 is spaced apart from the filter cavity 17 and the heat dissipation vent 155, forming a hidden air inlet structure. From the appearance, only the first air inlet 161 can be seen. Under normal circumstances, the filter cavity 17 and the heat dissipation vent 155 cannot be seen from the first air inlet 161, thereby ensuring the appearance quality and forming a hidden air inlet structure.

[0044] In some embodiments of the present application, see Figure 5-Figure 7As shown, the air inlet cover 16 has a cover body 162 that matches the open end of the air inlet cavity 15, a notch 1621 is provided at the edge of the cover body 162, and a first air inlet 161 is formed between the notch 1621 and the cavity wall of the air inlet cavity 15. By providing the notch 1621 to form the first air inlet, it can be ensured that the cover body 162 matches the open end of the air inlet cavity 15, and it is convenient to manufacture and form the notch 1621, thereby simplifying the process.

[0045] In some embodiments of the present application, the air intake cover 16 comprises a cover body 162, a cover edge 163 extending inwardly along the edge of the cover body 162, and a limiting rib 164 extending inwardly along the cover body 162. The cover edge 163 and the limiting rib 164 are arranged around the outside of the first filter element 156, that is, the cover edge 163 and the limiting rib 164 are arranged around the air intake filter element 156 to limit the air intake filter element 156. The outside of the first filter element 156 is referred to as the inside in the direction close to the center of the first filter element 156.

[0046] In some embodiments of the present application, a detachable cover of the air intake cover 16 is disposed in the air intake cavity 15, and a snap-fit ​​structure is disposed between the air intake cover 16 and the air intake cavity 15, so that the air intake cover 16 is snap-fitted and fixed in the air intake cavity 15, making it easy to load and unload the air intake cover 16. A snap-fit ​​groove 153 is disposed on the side wall of the air intake cavity 15, and a snap-fit ​​claw 1631 matching the snap-fit ​​groove 153 is disposed on the cover edge 163. When the air intake cover 16 is installed inwardly into the air intake cavity 15, the snap-fit ​​claw 1631 is snap-fitted and fixed with the snap-fit ​​groove 153.

[0047] In some embodiments of the present application, the inward extension dimension of the cover edge 163 is matched with the depth of the air inlet cavity 15, and the inner end of the cover edge 163 is against the bottom 152 of the air inlet cavity 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 simplification of the structure; and it is conducive to increasing the contact area between the cover edge 163 and the air inlet cavity 15, thereby increasing the stability after installation.

[0048] In some embodiments of the present application, see Fig. 9 and Fig.10 As shown, the filter chamber 17 is provided with a guide rib 174 extending outward, and the guide rib 174 is used to prevent the airflow from entering the filter chamber 17 from the gap between the first filter element 156 and the filter chamber 17. The guide rib 174 is provided to guide the airflow entering from the first air inlet 161 to the first filter element 156 for filtering, thereby ensuring the quality of the gas flowing into the filter chamber 17. Preferably, the guide rib 174 abuts against the first filter element 156, and the guide rib 174 extends in a direction close to the first filter element 156. The guide rib 174 plays a role in guiding the airflow, and also plays a role in limiting the first filter element 156, thereby preventing the first filter element 156 from moving inward.

[0049] In some embodiments of the present application, the guide rib 174 is arranged to extend in an arc shape in a direction close to the first filter element 156 and away from the first air inlet 161, and the guide rib 174 is an outwardly convex arc plate rib structure. The arc-shaped arrangement of the guide rib 174 is conducive to the smooth flow of gas and reduces wind resistance. The outside air entering from the first air inlet 161 reaches the air inlet cavity 15, part of the gas directly enters the first filter element 156, and part of the gas impacts the guide rib 174; then it flows along the guide rib 174 and enters the first filter element 156.

[0050] In some embodiments of the present application, the air inlet cover 16 has a cover body 162, and a limiting rib 164 extending inwardly along the cover body 162. The limiting rib 164 is used to limit the first filter element 156 to move toward the first air inlet 161, and the limiting rib 164 is located between the first air inlet 161 and the guide rib 174. The setting of the limiting rib 164 allows the outside air entering from the first air inlet 161 to be blocked by the limiting rib 164, so that more airflow in the air inlet cavity 15 impacts the guide rib 174, forming a bend in the airflow in the air inlet cavity 15, which is conducive to extending the air path, increasing the path length of the airflow in the first filter element 156, and improving the filtering effect.

[0051] In this embodiment, see Figure 1 and Fig.13 As shown, the cavity wall 172 of the filter cavity 17 is concave to form an avoidance groove 175, and the avoidance groove 175 is used to avoid the air inlet pipe head 36, and the air inlet pipe head 36 extends into the avoidance groove 175; it is conducive to compact structure setting and reduced space occupation. An air outlet hole 17511 matching the air inlet pipe head 36 is provided on the groove wall of the avoidance groove 175, and one end of the air inlet pipe head 36 is connected and installed at the air outlet hole 17511. By setting the avoidance groove 175, the air inlet pipe head 36 extends into the avoidance groove 175, which is conducive to compact structure setting of the filter cavity 17 and the air inlet pipe head 36 and reduced space occupation. The filter cavity 17 is arranged in the oxygen concentrator 100 to realize an integrated setting and avoid the increase of the space occupied by the oxygen concentrator 100; the detachable setting of the filter cavity 17 allows the filter cavity 17 to be directly replaced when the second filter element needs to be replaced, which is conducive to improving the efficiency of the replacement operation and ensuring that the second filter element 177 is installed in place.

[0052] In some embodiments of the present application, the air outlet 17511 is arranged opposite to the air inlet end of the filter chamber 17, and the air inlet end of the filter chamber 17 is surrounded to form a second air inlet 173, that is, the air outlet 17511 and the second air inlet 173 are arranged opposite to each other, and the direction of the air flow entering from the second air inlet 173 is consistent with the axial direction of the air outlet 17511; it is conducive to the air flow in the filter chamber 17 to quickly and efficiently reach the air outlet 17511. In order to facilitate the installation of the air inlet pipe head 36 and the air outlet 17511, an air outlet nozzle 17512 extending into the avoidance groove 175 is provided along the air outlet 17511, or in other words, an air outlet nozzle 17512 extending away from the air inlet end of the filter chamber 17 is provided along the air outlet 17511, and the air outlet nozzle 17512 is sealed and connected to the air inlet pipe head 36. By setting the air outlet nozzle 17512, the contact area between the air inlet pipe head 36 and the filter chamber 17 is increased, and the axial contact size of the air outlet hole 17511 is increased, which is beneficial to increase the sealing and fixing stability of the connection between the air inlet pipe head 36 and the air outlet nozzle 17512.

[0053] In some embodiments of the present application, the air inlet pipe head 36 comprises a pipe head 361, a joint portion 362 extending along the upper end of the pipe head 361, and the joint portion 362 is sealed with the air outlet nozzle 17512. The joint portion 362 is located inside the air outlet nozzle 17512, and a circumferential sealing groove 3621 is provided on the outer side of the joint portion 362, and a sealing ring is located at the sealing groove 3621 to achieve sealing between the joint portion 362 and the air outlet nozzle 17512.

[0054] In some embodiments of the present application, the filter cavity 17 has a first cavity wall 171 arranged opposite to the air inlet end, a second cavity wall 172 connected to the first cavity wall 171, and the air inlet pipe head 36 extends from the second cavity wall 172 into the avoidance groove 175. The avoidance groove 175 is provided on the first cavity wall 171 and the second cavity wall 172. In this embodiment, a heat dissipation vent 161 is provided on the rear wall of the housing 10, the air inlet end of the filter cavity 17 is located at the rear end of the filter cavity 17, the first cavity wall 171 is the front cavity wall of the filter cavity 17, the second cavity wall 172 is the bottom cavity wall, and the air inlet pipe head 36 extends from the bottom to the top into the filter cavity 17.

[0055] In some embodiments of the present application, see Figure 9-14 As shown, a support and limit portion 176 is provided in the filter chamber 17 to abut against the inner side of the second filter element 177, and the support and limit portion 176 is connected to the avoidance groove 175. The support and limit portion 176 is extended along the avoidance groove 175 toward the second filter element 177, and the second filter element 177 is provided to filter the gas flowing into the filter chamber 17, and the support and limit portion 176 is provided to achieve the limitation of the inner side of the second filter element 177.

[0056] In some embodiments of the present application, the support and limiter 176 is a plurality of spaced support columns 1761 extending along the avoidance groove 175 toward the air inlet end, and the plurality of support columns 1761 are arranged in parallel in the vertical direction, and one or more support and limiter 176 may be provided. The second filter element 177 is a folded filter paper structure, and the second filter element 177 has a plurality of transition portions 1771 that can extend into the gap between two adjacent support columns 1761, so as to achieve the limitation of the second filter element 177 in the inner and outer directions, and the uniform distribution in the vertical direction.

[0057] In some embodiments of the present application, the filter cavity 17 has a cavity 170 and a filter frame 178 surrounding the outside of the second filter element 176. The filter frame 178 is detachably arranged on the cavity 170. After the filter cavity 17 is disassembled, the second filter element 177 can be replaced by disassembling the filter frame 178. The edge of the filter frame 177 is provided with an outer rib 1781 for limiting the second filter element 177. The outer rib 1781 surrounds and forms the second air inlet 173.

[0058] In some embodiments of the present application, the second filter 177 is located outside the air outlet 17511, and the second filter 177 is spaced apart from the air outlet 17511; the avoidance groove 175 has a first groove wall 1751 with the air outlet 17511, the first groove wall 1751 is parallel to the second filter 177, the second filter 177 is spaced apart from the first groove wall 1751, and the second filter 177 and the first groove wall 1751 are surrounded to form an air supply cavity. In the filter cavity 17, the gas filtered by the second filter 177 enters the air supply cavity, and the gas in the air supply cavity can form a smooth airflow, and then supplied to the air outlet 17511; it is beneficial for the gas provided to the air inlet pipe head 36 to have a stable pressure and a gentle flow, which is beneficial to the operation of the compressor.

[0059] In some embodiments of the present application, see Fig. 9 , Fig.17 and Fig.18As shown, a first avoidance opening 1811 for avoiding the air intake pipe head 36 is provided in the first groove wall 181 of the mounting groove 18; by providing the first avoidance opening 1811, the air intake pipe head 36 extends into the mounting groove 18 through the first avoidance opening 1811. The first groove wall 181 is the lower groove wall of the mounting groove 18. The air intake pipe head 36 comprises a pipe head 361, a mounting plate 363 arranged outside the pipe head 361, and a mounting groove 1812 for accommodating the mounting plate 363 is provided inside the first avoidance opening 1811, and the mounting plate 363 is located in the mounting groove 1812. The mounting plate 363 and the mounting groove 1812 are provided so that the air intake pipe head 36 is limited in the mounting groove 18, so as to limit the position of the air intake pipe head 36 and limit the movement of the air intake pipe head 36 in the outward direction; and the air intake pipe head 36 is connected to the filter chamber 18 and the air intake pipe at both ends, so as to achieve a firm installation and fixation of the air intake pipe head 36. The mounting plate 363 is located in the mounting groove 1812 , and can limit the downward movement and circumferential movement of the intake pipe head 36 .

[0060] In some embodiments of the present application, the first avoidance opening 1811 is a U-shaped groove, and the upper end surface of the mounting plate 363 is flush with the upper end surface of the first groove wall 181; so that after the intake pipe head 36 is installed, the inner side of the first groove wall 181 of the mounting groove 18 is flush, and the pipe head 361 extends into the mounting groove 18, which is beneficial to the installation operation of the filter chamber 17.

[0061] In some embodiments of the present application, the air intake pipe head 36 has a limiting column 364 and a first connecting portion 365 connecting the limiting column 364 and the pipe head portion 361; a limiting groove 1813 matching the limiting column 364 is provided on the first groove wall 181, and the limiting column 364 is located in the limiting groove 1813. The limiting column 364 is used to limit the movement of the air intake pipe head 36 to the open end of the first avoidance port 1811. The limiting column 364 is located at the rear side of the pipe head portion 361, and the front side of the first avoidance port 1811 is an open end, that is, the limiting column 364 is mainly used to limit the movement of the air intake pipe head 36 in the forward direction. Of course, the limiting column 364 and the limiting groove 1813 can cooperate to limit the movement of the air intake pipe head 36 in other directions except upward. The limiting column 364 is installed in the limiting groove 1813 from top to bottom.

[0062] In some embodiments of the present application, the limiting column 364 is located at the outer end of the first connecting portion 365, and the limiting column 364 is arranged parallel to the axial direction of the pipe head 361; the end of the limiting groove 1813 away from the first groove wall 181 is the installation end of the limiting column 364. The air intake pipe head 36 is installed from the top, so that the air intake pipe at the lower end of the pipe head 361 is connected, and the limiting column 364 is installed in the limiting groove 1813.

[0063] In some embodiments of the present application, the air intake pipe head 36 further includes a second connection portion 366 connected between the mounting plate 363 and the first connection portion 365, the second connection portion 366 is spaced apart from the limiting column 364, and the second connection portion 366 is connected to the pipe head portion 361. The second connection portion 366 is provided to support the first connection portion 365 and increase the structural strength. A second avoidance opening 1812 connected to the first avoidance opening 1811 is provided on the second groove wall 182 of the mounting groove 18. The avoidance groove 175 is located on the inner side of the first avoidance opening 1811 and the second avoidance opening 1812.

[0064] In some embodiments of the present application, the filter chamber 17 is provided with an inwardly concave avoidance groove 175, which is used to avoid the air intake pipe head 36, and the air intake pipe head 36 extends into the avoidance groove 175; the avoidance groove 175 is provided to facilitate compact structure and reduce occupied space; and during the loading and unloading process of the filter chamber 17 along the axial direction of the joint portion 362, the air intake pipe head 36 is avoided. The avoidance groove 175 is located above the first avoidance port 181.

[0065] In some embodiments of the present application, see Fig. 9 and Fig.16 As shown, the lower end of the pipe head 361 is connected to the air inlet pipe 37, the air inlet pipe 37 is located in the equipment chamber 20, and a reserved opening 231 located above the air inlet pipe 37 is opened on the top plate 23 of the equipment chamber 20; the pipe head 361 passes through the reserved opening 231 to connect with the air inlet pipe 37. The compressor 35 is located in the compressor chamber 30, and the equipment chamber 20 is provided on the upper side of the compressor chamber 30, and the mounting groove 18 is located above the equipment chamber 20. When the air inlet pipe head 36 is installed downward, the lower end of the pipe head 36 passes through the reserved opening 231 to connect with the air inlet pipe 37, the mounting plate 363 is located in the mounting groove 1812, and the limiting column 364 is installed in the limiting groove 1813, so that the lower end of the air inlet pipe head 36 is connected and installed and fixed, which is conducive to simplifying the installation operation steps and improving the installation and fixing efficiency.

[0066] In some embodiments of the present application, a support edge 232 extending upwardly and bent is provided at the edge of the reserved opening 231, and the support edge 232 is used to support the mounting plate 363. The upper end of the support edge 232 is flush with the bottom of the mounting groove 1812.

[0067] In some embodiments of the present application, see Fig. 20 and Fig.21As shown, the heat dissipation vent 155 is extended in the inward direction away from the first air inlet 161, that is, the heat dissipation vent 155 is extended in the outward direction toward the first air inlet 161; so that the outside air entering the heat dissipation vent 155 flows inward and toward the heat dissipation vent 155 in the air inlet cavity 150, and the inclination direction of the heat dissipation vent 155 is consistent with the flow direction of the air flow in the air inlet cavity 150, which is conducive to the smoothness of the heat dissipation air path. Preferably, the inward inclination extension dimension of the heat dissipation vent 155 is greater than or equal to the width of the air inlet side 1551 of the heat dissipation vent 155. The heat dissipation vent 155 has an air inlet side 1551 and an air outlet side 1552. The distance between the plane where the lower end of the air inlet side 1551 is located and the plane where the lower end of the air outlet side 1552 is located is the inclined extension dimension of the heat dissipation vent 155 in the inward direction. The dimension of the heat dissipation vent 155 in the up and down directions is the width, and the inclined extension dimension is set to be greater than or equal to the width of the air inlet side 1551, so that when looking from the outside of the heat dissipation vent 155 to the inside, only the arc-shaped vent surface 1553 of the heat dissipation vent 155 can be seen.

[0068] In some embodiments of the present application, the heat dissipation vent 155 has two arcuate vent surfaces 1553 that are inclined and arranged opposite to each other up and down, and the arcuate vent surfaces 1553 are concave surfaces. By setting the arcuate vent surfaces 1553, it is beneficial to increase the cross-sectional size of the heat dissipation vent 155 and improve the air flow rate passing through. A plurality of heat dissipation vents 155 arranged in parallel are provided at the cavity bottom 152 of the air inlet cavity 15, and the heat dissipation vents 155 are extended in the horizontal direction. The distance between two adjacent heat dissipation vents 155 is equal to the width of the heat dissipation vent 155.

[0069] 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 aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein by 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 air intake module for an oxygen concentrator, It is characterized in that include: An air inlet cavity, which is formed by a recess in the outer shell of the oxygen concentrator; A mounting cavity formed concavely along a cavity wall opposite to the open end of the air inlet cavity; a filter chamber, which is detachably located in the mounting chamber; An air intake pipe head, which is communicated with the air intake of the compressor and extends into the installation cavity; The air inlet pipe head is connected to the filter cavity, a first filter element is arranged in the air inlet cavity, and a second filter element is arranged in the filter cavity.

2. The air intake module according to claim 1, It is characterized in that The air inlet pipe head comprises a pipe head portion and a joint portion which is bent along the upper end of the pipe head portion and extends toward the open end of the installation cavity; when the filter cavity is installed inwardly into the installation cavity, the filter cavity and the joint portion can be installed simultaneously.

3. The air intake module according to claim 1, It is characterized in that A heat dissipation vent is provided at the bottom of the air inlet cavity for heat dissipation air flow to pass through; outside air enters the air inlet cavity and passes through the first filter element; then part of the gas flows into the filter cavity and enters the oxygen production and supply air path; the other part of the gas flows into the heat dissipation vent and enters the heat dissipation flow path.

4. The air intake module according to any one of claims 1 to 3, It is characterized in that It also includes a detachable air inlet cover which is arranged on the open end of the air inlet cavity, and a first air inlet for introducing outside air is formed between the air inlet cover and the cavity wall of the air inlet cavity.

5. The air intake module according to claim 4, It is characterized in that The projection of the first air inlet on the bottom of the air inlet cavity is spaced apart from the filter cavity and the heat dissipation vent, forming a hidden air inlet structure.

6. The air intake module according to claim 4, It is characterized in that The air inlet cover comprises a cover body matching the open end of the air inlet cavity, a cover edge extending inwardly along the edge of the cover body, and a limiting rib extending inwardly along the cover body. The cover edge and the limiting rib are arranged around the outside of the first filter element, and the cover edge is snap-fitted and fixed to the cavity wall of the air inlet cavity.

7. The air intake module according to claim 4, It is characterized in that The filter cavity is provided with a guide rib extending outward and guiding the airflow into the first filter element, so as to prevent the airflow from entering the filter cavity through the gap between the first filter element and the filter cavity.

8. The air intake module according to claim 7, It is characterized in that The guide rib abuts against the first filter element, and the guide rib is extended in an arc shape in an outward direction away from the first air inlet, and the guide rib is an outwardly convex arc-shaped plate rib structure.

9. The air intake module according to any one of claims 1 to 3, It is characterized in that The cavity wall of the filter cavity is concave to form an avoidance groove for avoiding the air inlet pipe head. The air inlet pipe head extends into the avoidance groove, and an air outlet hole matching the air inlet pipe head is penetrated on the groove wall of the avoidance groove.

10. An oxygen concentrator, It is characterized in that An air intake module according to any one of claims 1 to 9.

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