Inlet air filtering and silencing box

Abstract

The utility model relates to the technical field of oxygen generator air inlet, and discloses an air inlet filtering and silencing box which comprises a box body and a cover body, a silencing block is arranged in an inner cavity of the cover body, an extension cavity is formed in the box body, an air inlet communicated with the box body is formed in the extension cavity, and the box body is provided with an air outlet communicated with the box body. A plurality of short noise reduction cavities and a long noise reduction cavity are adjacently arranged in an inner cavity of the box body in a separated mode, the short noise reduction cavities and the long noise reduction cavity are sequentially communicated through staggered communicating holes, a noise reduction channel is arranged between the upper noise reduction block and the lower noise reduction block, and airflow entering from the air inlet is exhausted from the air outlet along the noise reduction channel in the noise reduction cavities. According to the air inlet silencing box, the silencing cavities are communicated in the staggered mode, the whole silencing box is filled with the silencing blocks, air inlet impact and air inlet vortexes can be effectively weakened, meanwhile, air inlet noise is absorbed, and the silencing and noise reduction capacity of the whole air inlet silencing box is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of oxygen generator air intake technology, specifically an air intake filter silencer box. Background Technology

[0002] Most oxygen concentrators use molecular sieves to separate nitrogen and oxygen. When the compressor is working, both the intake and exhaust processes generate significant noise, failing to provide a quiet and comfortable environment for users undergoing oxygen therapy or health maintenance. While silencers are installed on the nitrogen exhaust pipe to reduce exhaust noise, and traditionally, sound-absorbing cotton is used inside the oxygen concentrator to reduce compressor noise, high-power oxygen concentrators, due to their large intake volume, short intake time, and limited volume of the intake and compressor equipment, experience higher airflow velocity and density during intake. This results in intake impact and turbulence, generating significant noise. Conventional intake silencers are insufficient to meet the increasing noise reduction requirements. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides an air intake filter silencer box, which solves the problem that the existing air intake silencer boxes in oxygen concentrators have a single silencer method, limited noise reduction effect, and are difficult to meet the needs of high noise reduction application scenarios.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An air intake filter silencer box includes a box body and a cover body. A silencer block is arranged in the inner cavity of the cover body. An extension cavity is provided on the box body, and an air inlet communicating with the box body is opened in the extension cavity. Several short silencer cavities and one long silencer cavity are arranged adjacently in the inner cavity of the box body. The short silencer cavities and the long silencer cavity are connected sequentially through staggered connecting holes. An air outlet is opened on the side wall of the long silencer cavity. Several silencer blocks are respectively fixedly installed on the end faces of the cover body and the box body. The silencer blocks are matched one-to-one with the short silencer cavities, the long silencer cavity, and the extension cavity. A silencer channel is arranged between the upper and lower silencer blocks. Airflow entering from the air inlet flows along the silencer channel within the silencer cavity and exits from the air outlet.

[0008] Preferably, the box body and the cover body are provided with fixing ears on opposite sides. The box body and the cover body are fixedly connected by connecting countersunk holes and fixing screws. The box body is provided with a mating seat that matches the connecting countersunk holes. The box body and the cover body are fixedly connected to the compressor housing by fixing ears and screws.

[0009] Preferably, snap-fit ​​protrusions are symmetrically arranged on the outer side of the extension cavity near the air inlet, and the air inlet is connected to a filter box by the snap-fit ​​protrusions, so that air enters the extension cavity after being filtered by the filter box.

[0010] Preferably, a sealing groove is continuously arranged along the edge of the short silencing cavity and the long silencing cavity on the end face of the box body, and a sealing gasket is arranged in the sealing groove when the cover and the box body are installed and closed.

[0011] (III) Beneficial Effects

[0012] This utility model has the following beneficial effects:

[0013] This intake filter muffler box, through the design of several short and long muffler chambers, can effectively extend the airflow distance and better consume the kinetic energy of the airflow, thus greatly reducing the airflow impact at the outlet. At the same time, because the entire muffler box is filled with muffler blocks to form a muffler channel, it can effectively reduce the intake impact and prevent the formation of intake turbulence, while absorbing intake noise, thus greatly reducing the noise at the outlet and enhancing the overall noise reduction capability of the intake muffler box. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall main structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the overall rear view structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the internal structure of the box body of this utility model;

[0017] Figure 4 This is a schematic diagram of the half-section structure of the BB section of this utility model;

[0018] Figure 5 This is a schematic diagram of the application state structure of this utility model.

[0019] In the diagram: 1. Box body; 2. Cover body; 3. Fixing ear; 4. Connecting countersunk hole; 5. Extension cavity; 6. Air inlet; 7. Snap-fit ​​protrusion; 8. Mating seat; 9. Sealing groove; 10. Short silencer cavity; 11. Connecting hole; 12. Silencing block; 13. Filter box; 14. Compressor housing; 15. Air outlet; 16. Long silencer cavity; 17. Silencing channel. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1 This utility model provides a technical solution: an air intake filter silencer box, including a box body 1 and a cover body 2. The inner cavity of the cover body is provided with silencer blocks 12. The box body 1 is provided with an extension cavity 5. The extension cavity 5 is provided with an air inlet 6 communicating with the box body 1. The inner cavity of the box body 1 is provided with several short silencer cavities 10 and one long silencer cavity 16 arranged adjacently. The short silencer cavities 10 and the long silencer cavity 16 are connected sequentially through staggered connecting holes 11. The side wall of the long silencer cavity 16 is provided with an air outlet 15. Several silencer blocks 12 are respectively fixedly arranged on the end faces of the cover body 2 and the box body 1. The silencer blocks 12 are matched with the short silencer cavities 10, the long silencer cavity 16 and the extension cavity 5. A silencer channel 17 is arranged between the upper and lower silencer blocks 12. The airflow entering from the air inlet 6 is discharged from the air outlet 15 along the silencer channel 17 in the silencer cavity.

[0022] This invention, through the arrangement of several short silencing cavities 10 and long silencing cavities 16, can effectively extend the airflow distance and better consume the kinetic energy of the airflow, thus greatly reducing the airflow impact at the outlet 15. At the same time, since the entire silencing box is filled with silencing blocks 12 to form a silencing channel 17, it can effectively reduce the intake air impact and prevent the formation of intake vortices, while also absorbing intake noise, thus greatly reducing the noise at the outlet 15 and enhancing the overall noise reduction capability of the intake silencing box.

[0023] In this embodiment, fixing ears 3 are arranged on the opposite sides of the box body 1 and the cover body 2. The box body 1 and the cover body 2 are fixedly connected by connecting countersunk holes 4 and fixing screws. The box body 1 is provided with a mating seat 8 that matches the connecting countersunk holes 4. The box body 1 and the cover body 2 are fixedly connected to the compressor housing 14 by fixing ears 3 and screws. (Refer to...) Figure 1 , 2 As shown in Figure 5, the fixed lug 3 facilitates the use of screws to securely connect the entire silencer box to the compressor housing 14; the countersunk hole 4 and mating seat 8 facilitate the installation stability between the box body 1 and the cover body 2.

[0024] In this embodiment, snap-fit ​​protrusions 7 are symmetrically arranged on the outer side of the extension cavity 5 near the air inlet 6. The air inlet 6 is connected to the filter box 13 by snap-fit ​​protrusions 7, and the air enters the extension cavity 5 after being filtered by the filter box 13. (Refer to...) Figure 1 and 5 As shown, the snap-fit ​​protrusion 7 allows for quick and easy removal of the filter box 13 for cleaning or replacement; the filter box 13 effectively filters the intake air.

[0025] In this embodiment, sealing grooves 9 are continuously arranged along the edges of the short silencing cavity 10 and the long silencing cavity 16 on the end face of the box body 1. When the cover 2 and the box body 1 are installed and closed, a sealing gasket is filled in the sealing grooves 9. (Refer to...) Figure 3 As shown, the sealing groove 9 and sealing gasket can effectively ensure the sealing performance of the box body 1 and the cover 2 when the entire silencer box is silencing air, thus avoiding the situation where the noise increases due to air leakage during the air intake process.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An air intake filter silencer box, comprising a box body and a cover, wherein a silencer block is arranged in the inner cavity of the cover body, characterized in that: The box body is provided with an extension cavity, and the extension cavity has an air inlet communicating with the box body. The inner cavity of the box body has several short silencing cavities and one long silencing cavity arranged adjacently. The short silencing cavities and the long silencing cavity are connected sequentially through staggered connecting holes. The side wall of the long silencing cavity has an air outlet. Several silencing blocks are respectively fixedly installed on the end faces of the cover and the box body. The silencing blocks are matched with the short silencing cavities, the long silencing cavity and the extension cavity. A silencing channel is arranged between the upper and lower silencing blocks. The airflow entering from the air inlet is discharged from the air outlet along the silencing channel in the silencing cavity.

2. The intake filter silencer box according to claim 1, characterized in that: The box body and the cover body are provided with fixing ears on opposite sides. The box body and the cover body are fixedly connected by connecting countersunk holes and fixing screws. The box body is provided with a mating seat that matches the connecting countersunk holes. The box body and the cover body are fixedly connected to the compressor housing by fixing ears and screws.

3. The intake filter silencer box according to claim 1, characterized in that: The outer side of the extension cavity is symmetrically arranged with snap-fit ​​protrusions near the air inlet. The air inlet is connected to a filter box by the snap-fit ​​protrusions, and the air enters the extension cavity after being filtered by the filter box.

4. The intake filter silencer box according to claim 1, characterized in that: Sealing grooves are continuously arranged along the edges of the short and long silencing cavities on the end face of the box. When the cover and the box are installed and closed, a sealing gasket is filled in the sealing groove.

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