An exhaust muffler

Abstract

This utility model provides an exhaust muffler, including a housing. The housing contains an exhaust chamber, a buffer chamber, and a muffler chamber. Along the length of the housing, the exhaust chamber and buffer chamber are located on opposite sides of the housing. Along the width of the housing, the muffler chamber is located on one or both sides of the buffer chamber. The exhaust muffler also includes: an air inlet, located on the outside of the housing and above the exhaust chamber, connected to the buffer chamber via an air inlet pipe connected to the housing; and an exhaust port, located on the outside of the housing and above the exhaust chamber, connected to the exhaust chamber. The advantage of this utility model is that by separately providing the buffer chamber, muffler chamber, and exhaust chamber within the housing of the exhaust muffler, and simultaneously placing the air inlet and exhaust port above the exhaust chamber, the airflow path within the exhaust muffler can be extended as much as possible, thus improving the muffler effect.

Description

Technical Field

[0001] This utility model relates to the field of noise reduction technology, and in particular to an exhaust noise reduction device. Background Technology

[0002] Existing oxygen generators first use a VPSA compressor to pressurize air, then input the pressurized air into a molecular sieve. The molecular sieve selectively adsorbs impurities such as nitrogen, carbon dioxide, and water from the air, while oxygen, which is not easily adsorbed, is output as the product gas. Next, the VPSA compressor extracts nitrogen from the molecular sieve, forcibly desorbing the previously adsorbed nitrogen, which is then discharged as waste gas, thus achieving a cyclic oxygen production function.

[0003] When existing oxygen concentrators are working, the VPSA compressor generates significant noise during the nitrogen discharge process, which affects the user experience. Utility Model Content

[0004] The purpose of this invention is to provide an exhaust silencing device that can effectively reduce the exhaust noise of a compressor.

[0005] This utility model provides an exhaust silencing device, including a housing, within which an exhaust chamber, a buffer chamber, and a silencing chamber are respectively provided. Along the length direction of the housing, the exhaust chamber and the buffer chamber are distributed on both sides of the housing; along the width direction of the housing, the silencing chamber is distributed on one or both sides of the buffer chamber. The exhaust silencing device further includes: an air inlet, disposed on the outside of the housing and above the exhaust chamber, the air inlet being connected to the buffer chamber via an air inlet pipe connected to the housing, and the buffer chamber being connected to the exhaust chamber via the silencing chamber; and an exhaust port, disposed on the outside of the housing and above the exhaust chamber, which is connected to the exhaust chamber.

[0006] Preferably, it further includes: a first partition plate disposed within the housing along the width direction of the housing, used to separate the buffer chamber from the exhaust chamber; the first partition plate is provided with a slot and a first air guide hole, the air intake pipe extends from the exhaust chamber to the buffer chamber through the slot, and the first air guide hole is used to connect the silencer chamber and the exhaust chamber.

[0007] Preferably, the housing includes a box body and a cover body covering the box body; the air intake pipe is integrally formed on the inner side of the cover body, and the slot is open at the top; the air intake hole and the exhaust hole are integrally formed on the outer side of the cover body.

[0008] Preferably, it further includes: a second partition plate disposed within the housing along the length direction of the housing, for separating the silencing cavity and the buffer cavity, wherein the second partition plate is disposed such that the cross-section of the silencing cavity is a variable diameter structure in whole or in part; the second partition plate is also provided with a second air guide hole for connecting the buffer cavity and the silencing cavity.

[0009] Preferably, the second partition is V-shaped with its opening facing the buffer cavity, and the silencing cavity formed between the second partition and the inner wall of the housing includes a primary silencing cavity and a secondary silencing cavity, both of which are variable diameter structures.

[0010] Preferably, it further includes: a second partition extension, one end of which is connected to the V-shaped corner of the second partition, and the other end extends toward the inner wall of the adjacent housing, with a gap between it and the inner wall of the housing, so as to form a third air duct for connecting the primary silencing cavity and the secondary silencing cavity.

[0011] Preferably, the diameters of the first air guide hole, the second air guide hole, and the third air guide hole are different.

[0012] Preferably, there are two second partitions, which are located on opposite sides of the buffer cavity along the width of the housing.

[0013] Preferably, the two second partitions are arranged asymmetrically on both sides of the buffer cavity.

[0014] Preferably, the second air guide hole is used to connect the buffer chamber and the primary silencer chamber, and the secondary silencer chamber is located between the primary silencer chamber and the exhaust chamber.

[0015] Preferably, the buffer chamber, the primary silencer chamber, the secondary silencer chamber, and the exhaust chamber have different sizes, with the buffer chamber having the largest volume.

[0016] Preferably, the intake pipe has an inlet at one end away from the intake port, and the inlet is located near the middle of the buffer chamber. The advantage of this utility model is that by setting a buffer chamber, a silencing chamber and an exhaust chamber respectively in the housing of the exhaust muffler, and setting the air inlet and exhaust outlet above the exhaust chamber, the air flow path of the gas in the exhaust muffler can be extended as much as possible, thereby improving the silencing effect. Attached Figure Description

[0017] Figure 1 These are perspective views and perspective views of the exhaust muffler device of this utility model; Figure 2 This is a schematic diagram of the cover structure; Figure 3 This is a structural diagram of the box. Figure 4 A 3D diagram of an oxygen concentrator; Figure 5 A 3D view of the main frame module; Figure 6 and Figure 7 These are 3D views of the compressor module from different perspectives. Figure 8 and Figure 9 These are schematic diagrams showing the installation structure of the exhaust muffler on the compressor housing from different perspectives.

[0018] Component designation explanation: 1-Main frame module; 11-Main support; 12-Card slot limiting component; 13-Molecular sieve gas inlet seat; 14-Compressor gas inlet seat; 2-Molecular sieve module; 3-Compressor module; 31-VPSA compressor; 32-Compressor housing; 3211-Exhaust grille; 3212-Limit edge; 33-Compressor connector; 331-Outlet passage; 332-Nitrogen inlet passage 4-Power supply module; 5-Intake muffler; 6-Exhaust muffler; 600 - Housing; 61-Cover; 611-Air inlet; 612-Cover plate; 6121-Exhaust outlet; 613-Air inlet pipe; 6131-Inlet; 62-Box body; 6211-Front side wall; 6212-Rear side wall; 6213-Left side wall; 6214-Right side wall; 622-Buffer chamber; 623-Primary silencer chamber; 624-Secondary silencer chamber; 625-Exhaust chamber; 63-Second partition; 631-Second air guide hole; 632-Second partition extension; 6321-Third air guide hole; 64-First partition; 641-Slot; 642-First air vent. Detailed Implementation

[0019] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate this utility model and are not intended to limit it.

[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0023] like Figure 1-3 As shown, the utility model provides an exhaust silencing device, which includes a housing 600, and an exhaust chamber 625, a buffer chamber 622, and a silencing chamber are respectively provided inside the housing 600. Along the length direction of the housing 600, the exhaust chamber 625 and the buffer chamber 622 are distributed on both sides inside the housing 600; along the width direction of the housing 600, the silencing chamber is distributed on one or both sides of the buffer chamber.

[0024] The exhaust muffler also includes an air inlet 611 and an exhaust outlet 6121. The air inlet 611 is located outside the housing 600 and above the exhaust chamber 625. The air inlet 611 is connected to a buffer chamber 622 via an air inlet pipe 613 connected to the housing 600. The buffer chamber 622 is connected to the exhaust chamber 625 via a muffler. The exhaust outlet 6121 is located outside the housing 600 and above the exhaust chamber 625, and is connected to the exhaust chamber 625.

[0025] As can be seen from the above, this utility model provides a buffer chamber, a silencing chamber, and an exhaust chamber in the housing of the exhaust muffler, and places the air inlet and exhaust outlet above the exhaust chamber. This can extend the airflow path of the gas in the exhaust muffler as much as possible and improve the silencing effect.

[0026] In the following description, such as Figure 3 As shown, the length direction of the housing 600 is defined as the front-to-back direction, and the width direction of the housing 600 is defined as the left-to-right direction.

[0027] like Figure 1-3 As shown, in a specific embodiment of this utility model, the exhaust silencing device further includes a first partition 64 and a second partition 63.

[0028] A first partition 64 is disposed within the housing 600 along the width direction of the housing 600, serving to separate the buffer chamber 622 from the exhaust chamber 625. The first partition 64 has a slot 641 and a first air guide hole 642. An intake pipe 613 extends from the exhaust chamber 625 into the buffer chamber 622 through the slot 641, thus connecting the intake hole 611 and the buffer chamber 622. The first air guide hole 642 connects the silencer chamber and the exhaust chamber 625.

[0029] The housing 600 specifically includes a box body 62 and a cover 61 disposed on top of the box body 62. The box body 62 has side walls on all four sides, including a front side wall 6211, a rear side wall 6212, a left side wall 6213, and a right side wall 6214. The aforementioned exhaust chamber 625, buffer chamber 622, silencer chamber, and first partition 64 are all disposed within the box body 62.

[0030] The cover 61 specifically includes a cover plate 612. An intake pipe 613 is integrally formed on the inner side of the cover plate 612. One end of the intake pipe is connected to the intake hole 611 via a pipe, and the other end extends straight towards the rear side of the cover plate 612, forming an inlet 6131 located in the buffer cavity 622. That is, the inlet 6131 is located at the end of the intake pipe 613 away from the intake hole 611. The intake pipe 613 can directly introduce gas into the buffer cavity 622, and its inlet 6131 is preferably located near the middle of the buffer cavity 622. This is because if the inlet 6131 is too close to the rear sidewall 6212, the impact force of the airflow on the rear side of the buffer cavity 622 will be too strong, easily generating noise; if the inlet 6131 is too close to the first partition 64, the airflow cannot impact the rear side of the buffer cavity 622, easily forming turbulence. Meanwhile, the slot 641 is open at the top, and the intake pipe 613 is embedded in the slot 641. While allowing the intake pipe 613 to pass through, the buffer chamber 622 and the exhaust chamber 625 are not directly connected.

[0031] Similarly, the cover plate 612 also has an inlet that communicates with the vent 6121 through an exhaust pipe. Those skilled in the art can also directly create the vent 6121 on the cover plate 612 as needed.

[0032] Furthermore, the exhaust muffler also includes a second partition 63, which is disposed within the housing 62 along the length of the housing 600. The second partition 63 separates the muffler chamber from the buffer chamber 622. The arrangement of the second partition 63 makes the airflow cross-section of the muffler chamber, either entirely or partially, a variable diameter structure, which helps to improve the muffler effect. Simultaneously, the second partition 63 is also provided with a second air guide hole 631 for connecting the buffer chamber 622 and the muffler chamber.

[0033] The second partition 63 is specifically V-shaped with its opening facing the buffer cavity 622. The silencing cavity formed between the second partition 63 and the inner wall of the housing 600 includes a primary silencing cavity 623 and a secondary silencing cavity 624, both of which are variable diameter structures. The second air guide hole 631 is used to connect the buffer cavity 622 and the primary silencing cavity 623, and the secondary silencing cavity 624 is located between the primary silencing cavity 623 and the exhaust cavity 625.

[0034] Furthermore, the exhaust muffler also includes a second partition extension 632. One end of the second partition extension 632 is connected to the V-shaped corner of the second partition 63, and the other end extends to the inner wall of the adjacent housing 600 (i.e., the left side wall 6213 or the right side wall 6214), and there is a gap between it and the inner wall of the housing 600. This gap is the third air guide hole 6321 for connecting the primary muffler chamber 623 and the secondary muffler chamber 624.

[0035] The aforementioned buffer chamber 622, primary silencing chamber 623, secondary silencing chamber 624, and exhaust chamber 625 have different sizes, with the buffer chamber 622 having the largest volume. As the airflow flows within the housing 62, the cross-sectional area of ​​the chambers it passes through continuously changes, which helps improve the silencing effect. Simultaneously, the diameters of the aforementioned first air guide 642, second air guide 631, and third air guide 6321 are different, which helps avoid acoustic resonance.

[0036] Preferably, there are two second partitions 63, located on the left and right sides of the buffer cavity 622 along the width direction of the housing 600. The silencing cavities are distributed between the second partition 63 on the left and the left side wall 6213, and between the second partition 63 on the right and the right side wall 6214. The two second partitions 63 can be symmetrically arranged on both sides of the buffer cavity 622, or they can be arranged asymmetrically on both sides of the buffer cavity 622.

[0037] like Figure 4-9 As shown, the exhaust silencing device described above can be installed as an exhaust silencing part 6 at the bottom of the compressor module 3 of the oxygen generator.

[0038] like Figure 1As shown, the oxygen concentrator includes a main frame module 1, a molecular sieve module 2, a compressor module 3, and a power supply module 4. The main frame module 1 is the main body of the oxygen concentrator, primarily used to connect and support the other modules. Figure 3 As shown, compressor module 3 is detachably mounted on main frame module 1, including compressor housing 32 and VPSA compressor 31 housed within compressor housing 32. VPSA compressor 31 draws in outside air and compresses it to a certain pressure, providing the necessary power and pressure conditions for the subsequent air separation process. Molecular sieve module 2 is the core component of the oxygen generator that achieves oxygen separation. It includes a molecular sieve cylinder containing molecular sieve material and an air inlet and a nitrogen outlet connected to the molecular sieve cylinder. After the air compressed by VPSA compressor 31 enters the molecular sieve material through the air inlet, the molecular sieve material separates oxygen and nitrogen from the compressed air through the principles of adsorption and desorption. Battery module 4 is used to power key components such as VPSA compressor 31 and molecular sieve module 2.

[0039] like Figure 6-9 As shown, compressor module 3 also includes an intake silencer 5 and an exhaust silencer 6, both of which are located at the bottom of compressor housing 32. VPSA compressor 31 includes a positive pressure inlet, a positive pressure outlet, a negative pressure inlet, and a negative pressure outlet. The intake silencer 5, positive pressure inlet, positive pressure outlet, and the inlet of molecular sieve module 2 are sequentially connected. The nitrogen venting port, negative pressure inlet, negative pressure outlet, and the inlet 611 of exhaust silencer 6 of molecular sieve module 2 are sequentially connected. VPSA compressor 31 is existing technology, integrating a blower and a vacuum pump into one unit, capable of simultaneously performing pressurization and vacuuming functions.

[0040] like Figure 6 As shown, the compressor housing 32 is also provided with a compressor connector 33. The compressor connector 33 is provided with an exhaust channel 331 and a nitrogen inlet channel 332. The exhaust channel 331 is used to connect the positive pressure exhaust port and the air inlet of the molecular sieve module 2, and the nitrogen inlet channel 332 is used to connect the negative pressure air inlet and the nitrogen discharge port of the molecular sieve module 2.

[0041] The working principle of the oxygen concentrator is as follows: Air enters the compressor module 3 and then enters the intake silencer 5. After being silenced by the intake silencer 5, it is output to the positive pressure intake port of the VPSA compressor 31. After being pressurized by the VPSA compressor 31, it is discharged from the positive pressure outlet and then output to the intake port of the molecular sieve module 2 through the outlet channel 331. The nitrogen separated by the molecular sieve module 2 is discharged through the nitrogen discharge port, nitrogen inlet channel 332, negative pressure inlet, and negative pressure outlet of the molecular sieve module 2 under the negative pressure. It is then discharged to the intake port 611 of the exhaust silencer 6, where it is silenced by the exhaust silencer 6, and finally discharged through the exhaust port 6121 of the exhaust silencer 6 and the exhaust grille 3211 on the compressor housing 32.

[0042] As can be seen from the above, the exhaust silencing device provided by this utility model can be used to silence the exhaust of the compressor module 3 of the oxygen generator, thereby improving the quietness of the oxygen generator.

[0043] Furthermore, such as Figure 5 As shown, the main frame module 1 includes a main support 11 and a compressor gas inlet 14 and a molecular sieve gas inlet 13 mounted on the main support 11. The compressor gas inlet 14 is connected to the outlet channel 331 and the nitrogen inlet channel 332 of the compressor connector 33, respectively. The molecular sieve gas inlet 13 is connected to the nitrogen discharge port and the gas inlet port of the molecular sieve module 2, respectively. The compressor gas inlet 14 and the molecular sieve gas inlet 13 are connected by a pipeline to achieve gas path communication.

[0044] Preferably, such as Figure 5 and Figure 7 As shown, the main frame module 1 is provided with at least two oppositely arranged slot limiting members 12, and the bottom of the compressor housing 32 is also provided with at least two downwardly extending limiting edges 3212. The slot limiting members 12 and the limiting edges 3212 are slidably engaged, and the compressor module 3 can slide left and right along the slot limiting members 12 through the limiting edges 3212.

[0045] After the compressor module 3 is assembled on the main frame module 1, the compressor connector 33 is inserted into the compressor gas inlet seat 14 to achieve an airtight connection. It is also quickly connected to the molecular sieve module 2 through the compressor gas inlet seat 14 and the molecular sieve gas inlet seat 13, ensuring smooth gas flow and efficient oxygen separation.

[0046] like Figure 7 and Figure 8 As shown, the exhaust muffler 6 is located between the two limiting edges 3212 and is fitted against the inner surface of the limiting edges 3212. Simultaneously, the upper end face of the exhaust muffler 6 extends into the compressor housing 32, and the lower end face of the exhaust muffler 6 does not exceed the lower end face of the limiting edge 3212. This prevents the arrangement of the exhaust muffler 6 from affecting the assembly of the compressor module 3 and the main frame module 1. Similarly, the lower end face of the intake muffler 5 does not exceed the lower end face of the limiting edge 3212 and is located outside the exhaust muffler 6. That is, the lower end face of the intake muffler 5 is lower than the lower end face of the exhaust muffler 6.

[0047] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. An exhaust silencing device comprising a housing (600), characterized in that, The housing (600) is provided with an exhaust chamber (625), a buffer chamber (622) and a silencer chamber. Along the length of the housing (600), the exhaust chamber (625) and the buffer chamber (622) are distributed on both sides of the housing (600); along the width of the housing (600), the silencer chamber is distributed on one or both sides of the buffer chamber. The exhaust muffler also includes: An air inlet (611) is provided on the outside of the housing (600) and above the exhaust chamber (625). The air inlet (611) is connected to the buffer chamber (622) through an air inlet pipe (613) connected to the housing (600). The buffer chamber (622) is connected to the exhaust chamber (625) through the silencer chamber. An exhaust port (6121) is provided on the outside of the housing (600) and above the exhaust chamber (625), and is connected to the exhaust chamber (625).

2. The exhaust silencing device according to claim 1, characterized in that Also includes: A first partition (64) is disposed within the housing (600) along the width direction of the housing (600) to separate the buffer chamber (622) from the exhaust chamber (625). The first partition (64) is provided with a slot (641) and a first air guide hole (642). The air intake pipe (613) extends from the exhaust chamber (625) to the buffer chamber (622) through the slot (641). The first air guide hole (642) is used to connect the silencer chamber and the exhaust chamber (625).

3. The exhaust silencing device of claim 2, wherein The housing (600) includes a box body (62) and a cover (61) covering the box body (62); the air intake pipe (613) is integrally formed on the inner side of the cover (61), and the slot (641) is open at the top; the air inlet (611) and the exhaust port (6121) are integrally formed on the outer side of the cover (61).

4. The exhaust silencing device of claim 2, wherein Also includes: The second partition (63) is disposed within the housing (600) along the length direction of the housing (600) to separate the silencing cavity from the buffer cavity (622). The arrangement of the second partition (63) makes the cross-section of the silencing cavity a variable diameter structure, either entirely or partially. The second partition (63) is also provided with a second air vent (631) for connecting the buffer cavity (622) and the silencer cavity.

5. The exhaust silencing device according to claim 4, characterized in that The second partition (63) is V-shaped with its opening facing the buffer cavity (622). The silencing cavity formed between the second partition (63) and the inner wall of the housing (600) includes a primary silencing cavity (623) and a secondary silencing cavity (624), both of which are variable diameter structures.

6. The exhaust muffler according to claim 5, characterized in that, Also includes: The second partition extension (632) has one end connected to the V-shaped corner of the second partition (63) and the other end extending to the inner wall of the adjacent housing (600), with a gap between it and the inner wall of the housing (600) to form a third air vent (6321) for connecting the primary silencing cavity (623) and the secondary silencing cavity (624).

7. The exhaust muffler according to claim 6, characterized in that, The diameters of the first air guide hole (642), the second air guide hole (631), and the third air guide hole (6321) are different.

8. The exhaust muffler according to claim 5, characterized in that, There are two second partitions (63), which are located on both sides of the buffer cavity (622) along the width direction of the housing (600).

9. The exhaust muffler according to claim 8, characterized in that, The two second partitions (63) are arranged in an asymmetrical structure on both sides of the buffer cavity (622).

10. The exhaust muffler according to claim 5, characterized in that, The second air guide hole (631) is used to connect the buffer chamber (622) and the primary silencer chamber (623), and the secondary silencer chamber (624) is located between the primary silencer chamber (623) and the exhaust chamber (625).

11. The exhaust muffler according to claim 5, characterized in that, The buffer chamber (622), the primary silencing chamber (623), the secondary silencing chamber (624), and the exhaust chamber (625) are all different in size, with the buffer chamber (622) having the largest volume.

12. The exhaust muffler according to claim 1, characterized in that, The intake pipe (613) has an inlet (6131) at one end away from the intake hole (611), and the inlet (6131) is located near the middle of the buffer chamber (622).

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