Air inlet silencer and oxygen production equipment

Abstract

The utility model provides an intake air silencer and oxygen generating equipment, intake air silencer comprises a shell, an inner cavity is formed in the shell, at least one partition plate is arranged in the inner cavity, the partition plate divides the inner cavity into a plurality of silencing cavities which are communicated and used for arranging sound absorbing materials, an air inlet is formed in the top of the shell, and the air inlet is communicated with the inner cavity. A groove used for avoiding an air inlet pipe of the compressor is formed in the bottom of the shell, and an air outlet used for being connected with the air inlet pipe is formed in the groove. The groove of the shell can better adapt to the appearance of the compressor, the internal space of the oxygen production equipment is reasonably utilized, the size of the device is increased, the silencing effect is improved, the direction of air flow in the silencing cavity can be influenced by the groove, the energy of the air flow is consumed, and noise is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of compressor silencing, and particularly relates to an air intake silencing device and an oxygen generating device. Background Art

[0002] An oxygen generating device is an oxygen generating device that uses a compressor to generate high-pressure air, transports the high-pressure air to an adsorption tower filled with molecular sieves, and then uses the principle of pressure swing adsorption of the molecular sieves to generate high-concentration oxygen.

[0003] When the compressor of the oxygen generating device works, it will generate relatively large noise, which is mainly concentrated in the noise of the compressor itself and the noise generated by the air flow entering the compressor. At present, the muffler for the intake air flow of the compressor is restricted by the internal space of the oxygen generator, with a small volume and poor silencing effect.

[0004] Therefore, there is an urgent need for a solution to solve the problem of poor silencing effect of the existing compressor intake silencing device. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an air intake silencing device and an oxygen generating device to solve the above technical problems in the prior art.

[0006] According to the first aspect of the utility model, an air intake silencing device is provided, including:

[0007] A housing, an inner cavity is formed inside it, at least one partition is arranged in the inner cavity, and the partition divides a plurality of communicating silencing cavities for arranging sound-absorbing materials in the inner cavity. An air inlet is arranged at the top of the housing, and a groove for avoiding the intake pipe of the compressor is formed at the bottom. An air outlet for connecting the intake pipe is arranged in the groove;

[0008] Sound-absorbing material, which is arranged in the silencing cavity.

[0009] In an embodiment of the utility model, the housing is configured to be flat and extend towards the opposite ends of the compressor, the air inlet is close to or located at one end of the housing, and the groove is close to the other end of the housing.

[0010] In an embodiment of the utility model, the partition extends from the top to the bottom of the inner cavity, and air vents for communicating adjacent silencing cavities are arranged on the partition.

[0011] In an embodiment of the present utility model, there are two partition plates, namely a first partition plate disposed between the air inlet and the groove, and a second partition plate disposed on the top of the groove. A first sound absorption cavity, a second sound absorption cavity, and a third sound absorption cavity are formed in sequence in the inner cavity. The air inlet is communicated with the first sound absorption cavity, and the air outlet is communicated with the third sound absorption cavity.

[0012] In an embodiment of the present utility model, a first ventilation port is disposed on the first partition plate near the bottom end, and a second ventilation port is disposed on the second partition plate near the top end.

[0013] In an embodiment of the present utility model, the air outlet is disposed on the side wall of the groove away from the air inlet. The second sound absorption cavity extends from the top of the groove to the side wall of the groove near the air inlet, and the third sound absorption cavity extends from the top of the groove to the side wall of the groove where the air outlet is disposed.

[0014] In an embodiment of the present utility model, the housing includes a main body and a cover plate that enclose the inner cavity. The main body includes side plates and a surrounding plate connected to the peripheral edges of the side plates. The cover plate is disposed opposite to the side plates and is detachably connected to the surrounding plate. The partition plate is disposed inside the main body; the groove is a through groove that communicates two opposite sides of the main body, and the groove includes a first side wall, a top wall, and a second side wall formed by the surrounding plate.

[0015] In an embodiment of the present utility model, a convex rib surrounding the sound absorption cavity is formed on the inner side of the cover plate. The convex rib is fitted on the inner side of the surrounding plate, and the sound absorption material is fitted on the inner side of the convex rib. A gap for cooperating with the partition plate is formed between the convex ribs surrounding adjacent sound absorption cavities.

[0016] In an embodiment of the present utility model, sound absorption materials are disposed in the sound absorption cavities. The sound absorption materials include a plurality of sound absorption plates, and two oppositely disposed sound absorption plates are disposed in each sound absorption cavity.

[0017] According to the second aspect of the present utility model, an oxygen generation device is further provided, which includes a compressor and the above-mentioned air inlet sound absorption device, and the air inlet sound absorption device is disposed in the compressor chamber of the oxygen generation device.

[0018] One beneficial effect of the present utility model is that:

[0019] The intake silencing device provided by the present utility model has an air inlet provided at the top of the housing, and a groove for avoiding the compressor intake pipe provided at the bottom. An air outlet is provided on the side wall of the groove away from the air inlet, which can better adapt to the shape of the compressor, make reasonable use of space, increase the volume of the device, and thus increase the number and volume of the silencing chambers inside the housing, improving the silencing effect; the groove can also affect the flow direction of the air flow in the silencing chamber, making the path of the air flow more tortuous and consuming more energy, thereby effectively reducing the noise of the air flow; by providing sound-absorbing materials in the silencing chamber, the noise reduction of the air flow in the silencing chamber can be effectively reduced, and silent air flow is delivered to the intake pipe of the compressor through the air outlet.

[0020] Other features and advantages of the present utility model will become clear through the following detailed description of the exemplary embodiments of the present utility model with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings incorporated in and constituting a part of this specification illustrate embodiments of the present utility model and, together with the description, are used to explain the principles of the present utility model.

[0022] Figure 1 is a schematic diagram of the intake silencing device and the compressor provided by an embodiment of the present utility model;

[0023] Figure 2 is a perspective view of the intake silencing device provided by an embodiment of the present utility model;

[0024] Figure 3 is an exploded view of the intake silencing device provided by an embodiment of the present utility model;

[0025] Figure 4 is a longitudinal sectional view of the intake silencing device provided by an embodiment of the present utility model;

[0026] Figure 5 is a schematic structural diagram of the main body of the intake silencing device provided by an embodiment of the present utility model;

[0027] Figure 6 is a schematic structural diagram of the main body of the intake silencing device provided by another embodiment of the present utility model;

[0028] Figure 7 is a schematic structural diagram of the cover plate of the intake silencing device provided by an embodiment of the present utility model;

[0029] Figure 8 is a schematic structural diagram of the cover plate and the sound-absorbing material of the intake silencing device provided by an embodiment of the present utility model;

[0030] Figure 9 is a transverse sectional view of the intake silencing device provided by an embodiment of the present utility model;

[0031] Figure 10 It is a schematic diagram of the internal structure of an oxygen generation device provided by an embodiment of the present utility model.

[0032] Figures 1 to 10 The one-to-one correspondence between the names of the components and the reference numerals in the figure is as follows:

[0033] In the figure, the reference numerals and their corresponding component names are as follows:

[0034] 1. Housing;

[0035] 11. Air inlet;

[0036] 12. Air outlet;

[0037] 13. Groove; 131. First side wall; 132. Second side wall; 133. Top wall;

[0038] 14. Sound absorption cavity; 141. First sound absorption cavity; 142. Second sound absorption cavity; 143. Third sound absorption cavity;

[0039] 15. Partition board;

[0040] 151. First partition board; 1510. First ventilation port;

[0041] 152. Second partition board; 1520. Second ventilation port;

[0042] 16. Main body; 161. Side plate; 162. Enclosing plate;

[0043] 17. Cover plate; 171. Convex rib; 172. Gap;

[0044] 2. Sound absorption material;

[0045] 21. Sound absorption board.

[0046] 3. Compressor;

[0047] 31. Intake pipe;

[0048] 4. Sound absorption cover. Detailed implementation manners

[0049] Now, various exemplary embodiments of the present utility model will be described in detail with reference to the accompanying drawings. It should be noted that: Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present utility model.

[0050] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way a limitation on the present utility model or its application or use.

[0051] Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be regarded as part of the specification.

[0052] In this document, terms such as "top", "bottom", "front", "rear", "upper", and "lower" are only used to represent the relative positional relationship between relevant parts, rather than defining the absolute positions of these relevant parts.

[0053] In this document, terms such as "first", "second", etc. are only used for differentiation from each other, rather than indicating importance, order, and the premise of mutual existence, etc.

[0054] In this document, terms such as "equal", "same", etc. are not strict mathematical and / or geometric restrictions, and also include errors that can be understood by those skilled in the art and are allowed in manufacturing or using, etc.

[0055] In this document, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0056] In this document, examples of various specific processes and materials are provided, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0057] The present utility model provides an intake silencing device, which is applied to the intake silencing of a compressor.

[0058] As Figures 1 to 9 shown, the intake silencing device includes a housing 1. An inner cavity is formed inside the housing 1. At least one partition 15 is arranged in the inner cavity of the housing 1. The partition 15 divides the inner cavity of the housing 1 into a plurality of communicating silencing cavities 14 for arranging sound-absorbing materials 2. An air inlet 11 is arranged at the top of the housing 1, and a groove 13 is formed at the bottom. The groove 13 is used to avoid the intake pipe 31 of the compressor 3. An air outlet 12 is arranged in the groove 13. The air outlet 12 is used to connect to the intake pipe 31 of the compressor.

[0059] The air inlet 11 and the air outlet 12 are respectively communicated with the silencing cavity 14. Airflow enters the silencing cavity 14 through the air inlet 11. The silencing cavity 14 can reduce the noise of the airflow. Sound-absorbing materials 2 are arranged in the silencing cavity 14, which can silencing and noise reduction of the airflow. The air outlet 12 can output quiet airflow, and the quiet airflow enters the compressor through the intake pipe 31. The sound-absorbing material 2 can be selected from porous sound-absorbing materials, such as inorganic fibers, organic fibers, inorganic foams, foam plastics, etc., or other existing sound-absorbing materials can be selected.

[0060] The intake silencing device is arranged on the intake side of the compressor. The groove 13 on the housing 1 avoids the intake pipe 31, which can better adapt to the shape of the compressor, rationally utilize the internal space of the oxygen generation device, increase the volume of the intake silencing device, thereby increasing the number and volume of the silencing chambers 14, improving the silencing effect, and making the internal structure of the oxygen generation device more reasonable and compact, which is beneficial to reducing the overall volume of the oxygen generation device.

[0061] The partition 15 in the inner cavity of the housing 1 can affect the flow path of the air flow. Multiple silencing chambers 14 gradually silence the air flow to ensure the silencing effect. The air outlet 12 is arranged in the groove 13 and can be directly connected to the intake pipe 31 in the groove 13, reducing the pipeline length, extending the path of the air flow in the silencing chamber 14, and giving full play to the silencing effect. The structure of the groove 13 obstructs the air flow in the silencing chamber 14, which can change the flow direction of the air flow, make the path of the air flow in the silencing chamber 14 more tortuous, consume more energy, and thus effectively reduce the noise of the air flow.

[0062] As Figure 2 shown, the air outlet 12 can be arranged on the side wall of the groove 13 far from the air inlet 11, which can increase the distance between the air inlet 11 and the air outlet 12, further extend the path of the air flow, and improve the silencing effect.

[0063] As Figure 1 shown, in order to reduce the noise of the whole compressor, a silencing cover 4 can be arranged inside the oxygen generation device. The compressor 3 is located inside the silencing cover 4 to limit the noise of the compressor 3 inside the silencing cover 4 and reduce the noise transmission. The intake silencing device is also arranged inside the silencing cover 4, and the housing 1 is set to a shape adapted to the internal space of the silencing cover 4.

[0064] In some embodiments, as Figure 2 shown, the housing 1 is configured as a flat shape extending towards the opposite ends of the compressor 3, which can adapt to the square silencing cover 4. The air inlet 11 of the housing 1 is close to or located at one end of the housing 1, and the groove 13 is close to the other end of the housing 1.

[0065] Specifically, the compressor 3 of the oxygen generation device is selected as an oil-free air compressor, which has two groups of cylinder components. The intake pipe 31 is a three-way pipe and can respectively supply air to the two groups of cylinder components. The intake pipe 31 is located on one side of the compressor, and the intake silencing device is arranged on this side of the compressor 3. The air inlet 11 at the top of the housing 1 extends upward out of the silencing cover 4 and is connected to the air pipeline of the oxygen generation device, or the air pipeline of the oxygen generation device extends into the silencing cover 4 and is connected to the air inlet 11 at the top of the housing 1.

[0066] Furthermore, for the convenience of connection, the air inlet 11 and / or the air outlet 12 can be set as a pipe joint structure extending out of the housing 1, which is convenient for the air inlet 11 to connect the air pipeline and the air outlet 12 to connect the intake pipe 31.

[0067] In some embodiments, as Figure 3 and Figure 4 shown, the partition 15 extends from the top to the bottom of the inner cavity of the housing 1, and ventilation openings communicating adjacent sound absorption cavities 14 are provided on the partition 15. The partition 15 is configured to restrict the airflow from entering the next sound absorption cavity 14 through the ventilation openings. The ventilation openings can be provided at the top, bottom, side, middle position or other positions of the partition 15.

[0068] Specifically, as Figure 5 and Figure 6 shown, the ventilation opening is a single through hole provided on the partition 15, or the ventilation opening is a gap between the partition 15 and the inner wall of the housing 1.

[0069] In some other specific embodiments, the ventilation opening can also be a plurality of sound absorption small holes (not shown in the figure) provided on the partition 15, and the ventilation opening can also be provided as an opening with other conventional shapes and structures.

[0070] In one embodiment, a partition 15 is provided inside the housing 1. The partition 15 can be provided at a position between the air inlet 11 and the groove 13, and the ventilation opening is close to the bottom of the partition 15. Sound absorption cavities 14 are respectively formed on the left and right sides of the partition 15. The air inlet 11 is located at the right end of the housing 1, and the groove 13 is close to the left end of the housing 1. The airflow enters the sound absorption cavity 14 on the right side of the partition 15 from the air inlet 11, and then enters the sound absorption cavity 14 on the left side of the partition 15 through the ventilation opening. The groove 13 forms a tortuous airflow path in the sound absorption cavity 14 on the left side of the partition 15, which can effectively reduce the noise of the airflow.

[0071] In another embodiment, as Figure 4 shown, there are two partitions 15, namely a first partition 151 and a second partition 152. The first partition 151 is provided between the air inlet 11 and the groove 13, and the second partition 152 is provided on the top of the groove 13. A first sound absorption cavity 141, a second sound absorption cavity 142 and a third sound absorption cavity 143 are sequentially arranged in the inner cavity of the housing 1. The air inlet 11 communicates with the first sound absorption cavity 141, and the air outlet 12 communicates with the third sound absorption cavity 143.

[0072] Furthermore, a first ventilation opening 1510 close to the bottom end is provided on the first partition 151, and a second ventilation opening 1520 close to the top end is provided on the second partition 152. The airflow sequentially passes through the air inlet 11, the first sound absorption cavity 141, the first ventilation opening 1510, the second sound absorption cavity 142, the second ventilation opening 1520, the third sound absorption cavity 143 and the air outlet 12.

[0073] Specifically, as Figure 4As shown, the air flow enters the first sound absorption cavity 141 through the air inlet 11 at the top of the housing 1, flows downward to the first ventilation port 1510 at the bottom of the first partition 151, enters the second sound absorption cavity 152 through the first ventilation port 1510, then bypasses one side of the groove 13 and flows upward to the second ventilation port 1520, enters the third sound absorption cavity 143 through the second ventilation port 1520, and then bypasses the other side of the groove 13 and flows downward to the air outlet 12 on the side wall of the groove 13.

[0074] Specifically, the air outlet 12 is arranged on the side wall of the groove 13 away from the air inlet 11. The second sound absorption cavity 142 extends from the top of the groove 13 to the side wall of the groove 13 close to the air inlet 11. The third sound absorption cavity 143 extends from the top of the groove 13 to the side wall of the groove 13 where the air outlet 12 is arranged. The air flow bypasses the right side, the top and the left side of the groove 13 in sequence from the second sound absorption cavity 142 to the third sound absorption cavity 143, and the direction of the air flow changes by 180 degrees, effectively playing a role in sound absorption.

[0075] In some embodiments, as Figure 3 and Figure 5 shown, the housing 1 includes a main body 16 and a cover plate 17 that enclose an inner cavity. The main body 16 includes side plates 161 and a surrounding plate 162 connected to the four peripheral edges of the side plates 161. The cover plate 17 is arranged opposite to the side plates 161 and is detachably connected to the surrounding plate 162. Specifically, the housing 1 encloses an inner cavity through the side plates 161, the surrounding plate 162 and the cover plate 17. The partition 15 is arranged inside the main body 16.

[0076] Specifically, the groove 13 is a through groove connecting two opposite sides of the housing 1. The groove 13 includes a first side wall 131, a top wall 133 and a second side wall 132 formed by the surrounding plate 162. The side plates 161 and the cover plate 17 are respectively arranged in shapes adapted to the groove 13. The air inlet 11 is arranged on the surrounding plate 162 at the top of the main body 16, and the air outlet 12 is arranged on the second side wall 132 of the groove 13. The second sound absorption cavity 142 extends from the first side wall 131 of the groove 13 to the top wall 133, and the third sound absorption cavity 143 extends from the top wall 133 of the groove 13 to the second side wall 132. The air flow passes through the first side wall 131, the top wall 133 and the second side wall 132 of the groove 13 in sequence.

[0077] Furthermore, to facilitate the disassembly and assembly of the housing 1, a plurality of threaded holes for installing screws can be arranged on the surrounding plate 162, and the cover plate 17 can be fixedly connected to the surrounding plate 162 through a plurality of screws. The partition 15 can be fixedly connected inside the main body 16 by means of bonding, welding, clamping, integral molding, etc., and only the cover plate 17 needs to be disassembled and assembled.

[0078] In some embodiments, as Figure 7 and Figure 8As shown in the figure, a convex rib 171 surrounding the sound absorption cavity 14 is formed on the inner side of the cover plate 17. When the cover plate 17 is connected to the surrounding plate 162, the convex rib 171 is fitted on the inner side of the surrounding plate 162, which can position the installation position of the cover plate 17, thus facilitating the installation of screws. The sound absorption material 2 can be fitted on the inner side of the convex rib 171, and the convex rib 171 can also position the installation of the sound absorption material 2.

[0079] Furthermore, the convex rib 171 is set to be adapted to the shape of the sound absorption cavity 14, and the convex rib 171 surrounds each sound absorption cavity 14 respectively. A gap 172 is formed between the convex ribs 171 surrounding adjacent sound absorption cavities 14. The gap 172 is used to cooperate with the partition plate 15, and the side of the partition plate 15 can be inserted into the gap 172, so as to effectively separate adjacent sound absorption cavities 14 and prevent air flow from passing through the gap between the partition plate 15 and the cover plate 17.

[0080] In some embodiments, as Figure 3 and Figure 9 shown, a sound absorption material 2 is provided in the sound absorption cavity 14. The sound absorption material 2 includes a plurality of sound absorption plates 21, and two oppositely arranged sound absorption plates 21 are provided in each sound absorption cavity 14. Air flow can pass through between the two oppositely arranged sound absorption plates 21.

[0081] Specifically, one of the sound absorption plates 21 in the sound absorption cavity 14 abuts against the main body 16, and the other sound absorption plate 21 abuts against the cover plate 17. The shape of the sound absorption plate 21 is adapted to the corresponding sound absorption cavity 14. The two oppositely arranged sound absorption plates 21 can absorb the noise of the air flow and reduce the noise from passing out through the main body 16 and the cover plate 17. The sound absorption plate 21 can be fixed on the main body 16 or the cover plate 17 by means of bonding, clamping, fastener connection, etc.

[0082] Air flow enters the air inlet 11 of the intake silencing device, then passes through a plurality of sound absorption cavities 14 in the housing 1 in sequence, changes the flow direction in the sound absorption cavity 14, consumes the energy of the air flow, and the sound absorption plates 21 in the sound absorption cavity 14 can fully absorb the noise of the air flow, and convey the silent air flow to the intake pipe 31 of the compressor through the air outlet 12.

[0083] The present utility model also provides an oxygen generating device, as Figure 10 shown, the oxygen generating device includes a compressor 3 and the intake silencing device provided by the present utility model as described above.

[0084] For the specific structure, principle, function, etc. of the intake silencing device of the oxygen generating device provided by the present utility model, reference can be made to the intake silencing device provided by the present utility model as described above, and thus will not be elaborated here.

[0085] In some embodiments, a compressor 3 and a silencing cover 4 are disposed inside an oxygen generating device. The compressor 3 is disposed inside the silencing cover 4 to limit the noise of the compressor 3 within the silencing cover 4 and reduce the noise transmission. An intake silencing device is disposed inside the silencing cover 4, and the intake silencing device can be configured into a shape adapted to the internal space of the silencing cover 4.

[0086] A groove 13 at the bottom of the housing 1 of the intake silencing device can avoid the intake pipe 31 of the compressor. The groove 13 enables the intake silencing device to better adapt to the outer shape of the compressor 3, make full use of the internal space of the silencing cover 4, thereby increasing the volume of the intake silencing device and improving the silencing effect; the groove 13 can also affect the flow direction of the air flow in the silencing chamber 14 inside the housing 1, making the path of the air flow more tortuous and consuming more energy, thereby effectively reducing the intake noise of the compressor 3; the silencing cover 4 can reduce the noise of the whole compressor 3, thereby providing a quiet oxygen-using environment for users.

[0087] The embodiments of the present invention have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, practical applications or technical improvements in the market, or enable other ordinary skill in the art in the technical field to understand the disclosed embodiments. The scope of the present invention is defined by the appended claims.

Claims

1. An intake silencing device, characterized in that, It includes a housing with an inner cavity formed therein. At least one partition is provided in the inner cavity, and the partition divides the inner cavity into a plurality of sound-absorbing cavities that are communicatively arranged and used for arranging sound-absorbing materials. An air inlet is provided at the top of the housing, and a groove for avoiding the intake pipe of the compressor is formed at the bottom. An air outlet for connecting the intake pipe is provided in the groove.

2. The intake silencing device according to claim 1, wherein the housing is configured to be flat and extend in the directions of opposite ends of the compressor, the air inlet is close to or located at one end of the housing, and the groove is close to the other end of the housing.

3. The intake silencing device according to claim 1, wherein the partition extends from the top to the bottom of the inner cavity, and air vents for communicating adjacent sound-absorbing cavities are provided on the partition.

4. The intake silencing device according to claim 3, wherein there are two partitions, namely a first partition arranged between the air inlet and the groove, and a second partition arranged at the top of the groove. A first sound-absorbing cavity, a second sound-absorbing cavity, and a third sound-absorbing cavity are formed in sequence in the inner cavity. The air inlet communicates with the first sound-absorbing cavity, and the air outlet communicates with the third sound-absorbing cavity.

5. The intake silencing device according to claim 4, wherein a first air vent close to the bottom end is provided on the first partition, and a second air vent close to the top end is provided on the second partition.

6. The intake silencing device according to claim 5, wherein the air outlet is provided on the side wall of the groove far from the air inlet. The second sound-absorbing cavity extends from the top of the groove to the side wall of the groove close to the air inlet, and the third sound-absorbing cavity extends from the top of the groove to the side wall of the groove where the air outlet is provided.

7. The intake silencing device according to claim 1, wherein the housing includes a main body and a cover plate that enclose the inner cavity. The main body includes side plates and a surrounding plate connected to the peripheral edges of the side plates. The cover plate is oppositely arranged with the side plates and is detachably connected to the surrounding plate. The partition is arranged inside the main body; the groove is a through groove communicating with opposite sides of the main body, and the groove includes a first side wall, a top wall, and a second side wall formed by the surrounding plate.

8. The intake silencing device according to claim 7, wherein a convex rib surrounding the sound-absorbing cavity is formed on the inner side of the cover plate. The convex rib is fitted inside the surrounding plate, and the sound-absorbing material is fitted inside the convex rib. A gap for cooperating with the partition is formed between the convex ribs surrounding adjacent sound-absorbing cavities.

9. The intake silencing device according to any one of claims 1 to 8, wherein sound-absorbing materials are provided in the sound-absorbing cavities. The sound-absorbing materials include a plurality of sound-absorbing plates, and two oppositely arranged sound-absorbing plates are provided in each sound-absorbing cavity.

10. An oxygen generation device, including a compressor, characterized in that, It further includes the intake silencing device according to any one of claims 1 to 9 above, and the intake silencing device is arranged in the compressor chamber of the oxygen production equipment.

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