Nitrogen venting muffler

Abstract

The utility model relates to a kind of nitrogen exhaust muffler, it includes: nitrogen exhaust pipeline is equipped with air inlet pipe and air outlet pipe, inside is equipped with sound-absorbing cavity, the air inlet pipe extends to the sound-absorbing cavity, multiple flow-guiding holes are equipped on the air inlet pipe. By extending to the sound-absorbing cavity inside air inlet pipe, and multiple flow-guiding holes are equipped on the air inlet pipe, flow-guiding hole can play the even shunt effect to the nitrogen entering, to reduce noise, long service life, sound-absorbing effect is good.

Description

Technical Field

[0001] This utility model relates to the field of emission silencing, specifically to a nitrogen emission silencer. Background Technology

[0002] Traditional oxygen concentrators utilize molecular sieve physical adsorption and desorption technology to separate oxygen from the air for use, while expelling nitrogen. Oxygen concentrators generate significant noise during nitrogen expulsion, and existing models are generally equipped with nitrogen expulsion silencers. However, traditional silencers only use simple sound-absorbing cotton, resulting in a short lifespan and poor noise reduction effectiveness. Utility Model Content

[0003] Based on the above description, this utility model provides a nitrogen-removing silencer to solve the problems of short service life and poor sound-absorbing effect of sound-absorbing cotton in related technologies.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a nitrogen exhaust silencer, comprising: a nitrogen exhaust pipe, an air inlet pipe and an air outlet pipe, and an internal silencer cavity, wherein the air inlet pipe extends into the silencer cavity and is provided with a plurality of guide holes.

[0005] Furthermore, a mesh shell is installed inside the silencing cavity, and the shell is filled with gravel.

[0006] Furthermore, the shell is isolated from the gravel by a wire mesh.

[0007] Furthermore, the housing is provided in multiple parts, which are sequentially and spaced apart on the inner wall of the silencing cavity.

[0008] Furthermore, a polyurethane foam board is installed inside the silencing cavity, and the polyurethane foam board extends along the length of the nitrogen exhaust pipe.

[0009] Furthermore, multiple polyurethane foam boards are provided, with their two ends sequentially and spaced apart on the inner wall of the sound-absorbing cavity.

[0010] Furthermore, the polyurethane foam board is located above the housing, and the housing is located above the air inlet pipe.

[0011] Furthermore, the diameter of the air inlet pipe is smaller than the diameter of the air outlet pipe.

[0012] Furthermore, the intake pipe extends from one side of the nitrogen exhaust pipe to near the other side.

[0013] Furthermore, the air intake pipe is provided with the guide holes around its outer perimeter.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: By extending the air intake pipe into the silencing cavity and providing multiple guide holes on the air intake pipe, the guide holes can evenly distribute the incoming nitrogen gas, thereby reducing noise, extending service life, and providing good silencing effect. Attached Figure Description

[0015] Figure 1 A schematic diagram of the overall structure of the nitrogen exhaust silencer provided in this embodiment of the utility model; Figure 2 A cross-sectional view of the nitrogen exhaust silencer provided in an embodiment of this utility model; Figure 3 A front view of the nitrogen exhaust silencer provided in an embodiment of this utility model; Figure 4 A top view of the nitrogen exhaust silencer provided in an embodiment of this utility model.

[0016] The attached diagram lists the components represented by each number as follows: 1. Nitrogen venting pipe; 11. Silencing chamber; 2. Inlet pipe; 21. Guide hole; 3. Outlet pipe; 4. Shell; 5. Gravel; 6. Polyurethane foam board. Detailed Implementation

[0017] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0018] This utility model provides a nitrogen-removing silencer, which can solve the problems of short service life and poor sound-absorbing effect of sound-absorbing cotton in related technologies. See Figures 1-4 As shown in the figure, a nitrogen venting silencer provided in this utility model embodiment includes: a nitrogen venting pipe 1, an inlet pipe 2 and an outlet pipe 3, and an internal silencing cavity 11. The inlet pipe 2 extends into the silencing cavity 11, and the inlet pipe 2 is provided with a plurality of guide holes 21. The guide holes 21 play a primary noise reduction role and can uniformly distribute the incoming nitrogen gas, thereby reducing noise. It has a long service life and good silencing effect.

[0019] See Figure 1 As shown, in some embodiments, a mesh shell 4 is installed inside the silencing cavity 11, and the shell 4 is filled with gravel 5. The gravel 5 plays a secondary noise reduction role. After the sound waves enter the micropores, they are converted into heat energy by friction with the gravel 5, thereby achieving the noise reduction effect. At the same time, the cavities between the gravel particles form a resonant structure, which further consumes sound energy.

[0020] See Figure 1 As shown, in some embodiments, the shell 4 and the gravel 5 are isolated by a wire mesh. Since the gravel 5 particles are small, they are prone to resonance after nitrogen flows in. The wire mesh can play an isolation role and prevent the gravel 5 from leaking.

[0021] See Figure 1 As shown, in some embodiments, the housing 4 is provided in multiple units, which are sequentially and spaced apart on the inner wall of the silencing cavity 11, so that nitrogen gas can fully contact the gravel 5 and improve the silencing effect.

[0022] See Figure 1 As shown, in some embodiments, a polyurethane foam board 6 is installed inside the silencing cavity 11, and the polyurethane foam board 6 extends along the length direction of the nitrogen exhaust pipe 1.

[0023] See Figure 1 As shown, in some embodiments, multiple polyurethane foam boards 6 are provided, with their two ends sequentially and spaced apart on the inner wall of the sound-absorbing cavity 11. The polyurethane foam boards 6 play a three-level noise reduction role. The polyurethane foam boards 6 are filled with polyurethane foam particles and have a highly elastic porous structure. They absorb sound energy through deformation and reduce noise through micro-pressure diversion during the large-volume exhaust process.

[0024] See Figure 1 As shown, in some embodiments, the polyurethane foam board 6 is located above the housing 4, and the housing 4 is located above the air inlet pipe 2. Nitrogen gas passes through the noise reduction structure in the first, second, and third stages from bottom to top, resulting in good noise reduction effect.

[0025] See Figure 1 As shown, in some embodiments, the diameter of the intake pipe 2 is smaller than the diameter of the exhaust pipe 3, which further improves the noise reduction effect. Compared with the prior art, the high frequency is reduced by 6-7 decibels and the low frequency is reduced by 3-4 decibels, and no negative pressure is generated during the exhaust process.

[0026] See Figure 1 As shown, in some embodiments, the air intake pipe 2 extends from one side of the nitrogen exhaust pipe 1 to near the other side, with more guide holes 21, resulting in more uniform nitrogen distribution and better noise reduction.

[0027] See Figure 1 As shown, in some embodiments, the air intake pipe 2 is provided with the guide holes 21 around its outer perimeter, which improves the flow diversion effect.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0029] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "over," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "under" or "below" of other elements or features will be oriented "over" of other elements or features. Therefore, the exemplary terms "below" and "under" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0030] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0031] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A nitrogen-expelling silencer, characterized in that, It includes: The nitrogen discharge pipe (1) is provided with an air inlet pipe (2) and an air outlet pipe (3), and has an internal silencing cavity (11). The air inlet pipe (2) extends into the silencing cavity (11), and the air inlet pipe (2) is provided with multiple guide holes (21).

2. The nitrogen exhaust silencer according to claim 1, characterized in that: The silencing cavity (11) is equipped with a mesh shell (4), which is filled with gravel (5).

3. The nitrogen exhaust silencer according to claim 2, characterized in that: The shell (4) and the gravel (5) are separated by a wire mesh.

4. The nitrogen exhaust silencer according to claim 2, characterized in that: The housing (4) is provided in multiple parts, which are installed sequentially and at intervals on the inner wall of the silencing cavity (11).

5. The nitrogen exhaust silencer according to claim 1, characterized in that: A polyurethane foam board (6) is installed inside the silencing cavity (11), and the polyurethane foam board (6) extends along the length of the nitrogen discharge pipe (1).

6. The nitrogen exhaust silencer according to claim 5, characterized in that: Multiple polyurethane foam boards (6) are provided, and their two ends are sequentially and spaced apart on the inner wall of the sound-absorbing cavity (11).

7. The nitrogen exhaust silencer according to claim 6, characterized in that: The polyurethane foam board (6) is located above the housing (4), which is located above the air inlet pipe (2).

8. The nitrogen exhaust silencer according to claim 1, characterized in that: The diameter of the air inlet pipe (2) is smaller than the diameter of the air outlet pipe (3).

9. The nitrogen exhaust silencer according to claim 1, characterized in that: The air intake pipe (2) extends from one side of the nitrogen exhaust pipe (1) to near the other side.

10. The nitrogen exhaust silencer according to claim 1, characterized in that: The air intake pipe (2) is provided with the guide hole (21) around its outer perimeter.

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