Exhaust silencer and oxygen generator

Abstract

This application belongs to the technical field of medical devices and discloses an exhaust muffler and an oxygen generator. The exhaust muffler includes a muffler box with an internal air-containing cavity. The air-containing cavity includes multiple muffler chambers arranged sequentially along the circumference of the muffler box. Two adjacent muffler chambers are respectively an air intake muffler chamber and an exhaust muffler chamber. The multiple muffler chambers are sequentially connected from the air intake muffler chamber to the exhaust muffler chamber along the circumference of the muffler box. The muffler box is provided with an air inlet communicating with the air intake muffler chamber and an exhaust port communicating with the exhaust muffler chamber. This reduces the kinetic energy of the exhaust gas when it is discharged through the exhaust port, increases the flow path of the exhaust gas in the muffler box, and further reduces the kinetic energy of the exhaust gas. While keeping the volume of the muffler box unchanged, it maximizes the extension of the flow path of the exhaust gas, thereby greatly improving the noise reduction effect of the exhaust muffler and improving the user experience.

Description

Technical Field

[0001] This application belongs to the technical field of medical devices, specifically relating to an exhaust silencer and an oxygen generator. Background Technology

[0002] An oxygen concentrator is a medical device that separates oxygen from the air through physical means to provide users who need oxygen therapy with a high concentration of oxygen. Because oxygen concentrators need to frequently exhaust air during the pressure swing adsorption process, the rapid opening and closing of the exhaust valve will generate airflow pulse noise. Therefore, oxygen concentrators are usually equipped with exhaust silencers to optimize the exhaust airflow path and reduce the noise generated during exhaust.

[0003] Because existing exhaust mufflers typically employ a simple internal cavity structure or achieve noise reduction during the oxygen generator's exhaust process by setting multiple air holes on the outside, the noise reduction effect of the exhaust mufflers is poor, which in turn affects the user experience. Utility Model Content

[0004] This application provides an exhaust muffler to improve the noise reduction effect of the exhaust muffler, thereby improving the user experience.

[0005] The technical solution adopted in this application is as follows:

[0006] An exhaust muffler includes a muffler box with an internal air chamber. The air chamber includes a plurality of muffler cavities arranged sequentially along the circumference of the muffler box. Two adjacent muffler cavities are an intake muffler cavity and an exhaust muffler cavity, respectively. The plurality of muffler cavities are sequentially connected from the intake muffler cavity to the exhaust muffler cavity along the circumference of the muffler box. The muffler box is provided with an air inlet communicating with the intake muffler cavity and an exhaust port communicating with the exhaust muffler cavity.

[0007] By adopting the above technical solution, when using the exhaust silencer in this application, the exhaust pipe of the oxygen generator is connected to the air inlet, so that when the oxygen generator is venting, the exhaust gas discharged by the oxygen generator enters the air intake silencer chamber through the air inlet, and then the exhaust gas passes through multiple silencers along the circumference of the silencer box and finally enters the exhaust silencer chamber. The exhaust gas in the exhaust silencer chamber is finally discharged through the exhaust port.

[0008] Because the air chamber includes multiple silencers, and the exhaust gas undergoes diffusion after entering each silencer, the kinetic energy of the exhaust gas as it exits through the exhaust port is greatly reduced, thus lowering the noise generated by the oxygen concentrator during exhaust. Simultaneously, since the multiple silencers are arranged sequentially along the circumference of the silencer box, with adjacent silencers serving as the intake and exhaust silencers respectively, the exhaust gas flows along the circumference of the silencer box, increasing the flow path within the silencer box and further reducing its kinetic energy. Furthermore, while maintaining the same volume of the silencer box, the flow path of the exhaust gas is maximized, significantly improving the noise reduction effect of the exhaust silencer and enhancing the user experience.

[0009] Optionally, the remaining silencing chamber among the plurality of silencing chambers is a process silencing chamber, and at least two process silencing chambers are provided.

[0010] By adopting the above technical solution, the exhaust gas discharged from the oxygen generator enters the intake silencer chamber through the air inlet. The exhaust gas then passes through multiple process silencers in sequence along the circumference of the silencer box before entering the exhaust silencer chamber. This process reduces the kinetic energy of the exhaust gas as it passes through the intake silencer chamber, process silencer chamber, and exhaust silencer chamber before finally being discharged through the exhaust port.

[0011] Since there are at least two process silencers, the number of times the exhaust gas diffuses within the silencer box is increased, thereby further reducing the kinetic energy of the exhaust gas when it is discharged through the exhaust port. This further improves the noise reduction effect of the exhaust silencer, thus enhancing the user experience.

[0012] Furthermore, since there are at least two process silencers, the volume of each silencer can be reduced while keeping the volume of the silencer box unchanged. This increases the distribution density of the partition ribs inside the silencer box, thereby increasing the structural strength of the silencer box and extending the service life of the exhaust silencer. On the other hand, it increases the number of times the exhaust gas can impact the partition ribs, further reducing the kinetic energy of the exhaust gas and thus further improving the noise reduction effect of the exhaust silencer.

[0013] Optionally, the muffler box has multiple partition ribs inside, which together divide the internal space of the muffler box into the intake muffler chamber, the exhaust muffler chamber, and the process muffler chamber.

[0014] By adopting the above technical solution, the internal structure of the muffler box is simplified due to the presence of multiple partition ribs, which reduces the production difficulty of the muffler box and thus lowers the production cost of the exhaust muffler.

[0015] Optionally, the partition rib is provided with a connecting hole;

[0016] And / or, the dividing rib is provided with a connecting pipe.

[0017] By adopting the above technical solution, since the partition rib is provided with connecting holes, the connection between two adjacent muffler chambers is realized on the one hand, and the structural design of the muffler box is simplified on the other hand, so as to further reduce the production difficulty of the muffler box and thus further reduce the production and manufacturing cost of the exhaust muffler.

[0018] Because the partition ribs are equipped with connecting pipes, on the one hand, the two adjacent silencers are connected, and on the other hand, sound waves of a specific frequency band can be eliminated in the connecting pipes and the flow path of exhaust gas in the silencer box can be further extended, thereby further improving the noise reduction effect of the exhaust silencer box on exhaust gas.

[0019] Optionally, the partition rib includes a first partition rib located between the intake muffler cavity and the process muffler cavity, and a second partition rib located between the process muffler cavity and the exhaust muffler cavity. The first partition rib is provided with a first connecting hole, and the second partition rib is provided with a second connecting hole. The diameter of the first connecting hole is equal to or smaller than the diameter of the second connecting hole.

[0020] And / or, the first partition rib is provided with a first connecting pipe, the second partition rib is provided with a second connecting pipe, and the inner diameter of the first connecting pipe is equal to or less than the inner diameter of the second connecting pipe.

[0021] By adopting the above technical solution, since the diameter of the first connecting hole is equal to the diameter of the second connecting hole, the production difficulty of the muffler box is further reduced, thereby further reducing the production cost of the exhaust muffler and improving the production efficiency of the exhaust muffler.

[0022] Since the diameter of the first connecting hole is smaller than that of the second connecting hole, the walls of the first and second connecting holes can be used to eliminate sound waves of different frequency bands, thereby further improving the noise reduction effect of the exhaust muffler on exhaust gas.

[0023] Since the inner diameter of the first connecting pipe is equal to the inner diameter of the second connecting pipe, the manufacturing difficulty of the muffler box is further reduced, thereby further reducing the manufacturing cost of the exhaust muffler and improving the production efficiency of the exhaust muffler cavity.

[0024] Since the inner diameter of the first connecting pipe is smaller than that of the second connecting pipe, the first and second connecting pipes can be used to eliminate sound waves of different frequency bands, thereby further improving the noise reduction effect of the exhaust muffler on exhaust gas.

[0025] Optionally, the muffler box includes a housing and a cover disposed on the housing. The cross-sectional shape of the housing is circular or regular polygonal. The air inlet is disposed on the housing or the cover, and the exhaust port is disposed on the housing or the cover.

[0026] By adopting the above technical solution, since the cross-sectional shape of the shell is circular or regular polygonal, the cover and shell have multiple installation directions. As a result, when the exhaust muffler is adapted to different models of oxygen generators, only the molds of the shell and cover need to be adjusted to adjust the air intake and exhaust positions, without the need to redesign the exhaust muffler. This increases the applicability of the exhaust muffler and reduces the development and design cost of the exhaust muffler.

[0027] Optionally, the housing is provided with a first partition rib and a second partition rib. The first partition rib is provided with a connecting hole, and the second partition rib is provided with a connecting pipe. The thickness of the second partition rib is greater than the thickness of the first partition rib.

[0028] By adopting the above technical solution, since the first partition rib is provided with a connecting hole, the exhaust gas in the intake silencer chamber can enter the process silencer chamber more smoothly, thereby improving the intake efficiency of the exhaust gas entering the process silencer chamber, thus reducing the exhaust resistance of the oxygen generator and improving the exhaust smoothness of the oxygen generator; and since the second partition rib is provided with a connecting pipe, and the thickness of the second partition rib is greater than that of the first partition rib, the connection area between the connecting pipe and the second partition rib is increased, thereby increasing the stability of the connecting pipe, and thus ensuring the noise reduction effect of the exhaust silencer on the exhaust gas.

[0029] Optionally, the cover is provided with a mating rib, one of the mating rib and the second partition rib is provided with a positioning groove, and the other of the two is provided with a positioning rib extending into the positioning groove.

[0030] By adopting the above technical solution, since one of the mating ribs and the second partition rib is provided with a positioning groove, and the other of the two is provided with a positioning rib extending into the positioning groove, on the one hand, the positioning rib and the positioning groove can be used to position the cover and the shell, thereby reducing the assembly difficulty of the muffler box and improving the assembly efficiency of the muffler box. On the other hand, the positioning rib and the positioning groove can also be used to increase the sealing between the second partition rib and the cover, so as to ensure that all the exhaust gas in the process muffler cavity enters the exhaust muffler cavity through the connecting pipe, thereby ensuring the elimination effect of the connecting pipe on the sound waves of a specific frequency band, and thus ensuring the noise reduction effect of the exhaust muffler on the exhaust gas. Furthermore, the mating rib can also increase the structural strength of the cover, thereby extending the service life of the exhaust muffler box.

[0031] Optionally, the edge of the cover extends toward the side where the housing is located and is provided with an edge, one of the edge and the housing is provided with a sealing groove, and the other is provided with a sealing rib extending into the sealing groove.

[0032] By adopting the above technical solution, since the edge of the cover extends towards the side where the shell is located, and a sealing groove is provided on one side of the edge and the shell, and a sealing rib extending into the sealing groove is provided on the other side, the shape of the cover is the same as the shape of the shell, thereby reducing the amount of raw materials required when manufacturing the cover, thus reducing the manufacturing cost of the exhaust muffler box. On the other hand, the cooperation between the sealing rib and the sealing groove can be used to position the shell and the cover, thereby reducing the assembly difficulty of the muffler box and improving the production efficiency of the muffler box. Furthermore, the cooperation between the sealing groove and the sealing rib can increase the sealing between the cover and the shell, so as to avoid air leakage in the muffler box, thereby further ensuring the noise reduction effect of the exhaust muffler on the exhaust gas.

[0033] Optionally, the silencer box is provided with a silencer made of sound-absorbing material inside, and the silencer fills at least a portion of the air cavity.

[0034] By adopting the above technical solution, since the muffler is filled in at least a part of the air cavity, it can absorb, reflect and attenuate the sound waves of the exhaust gas, thereby effectively reducing the low-frequency noise generated by the exhaust gas and further improving the noise reduction effect of the exhaust muffler on the exhaust gas.

[0035] This application also discloses an oxygen concentrator to reduce the noise generated during the exhaust process and improve the user experience.

[0036] An oxygen generator includes an exhaust silencer as described above.

[0037] By adopting the above technical solution, the oxygen concentrator in this application uses the above-mentioned exhaust silencer, thereby reducing the noise generated by the oxygen concentrator during exhaust, thus improving the user experience, and also reducing the design and development cost of the oxygen concentrator.

[0038] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0039] 1. The exhaust muffler in this application includes a muffler box, the interior of which has an air-containing cavity. The air-containing cavity includes multiple muffler chambers arranged sequentially along the circumference of the muffler box. Two adjacent muffler chambers are respectively an intake muffler chamber and an exhaust muffler chamber. The multiple muffler chambers are sequentially connected along the circumference of the muffler box from the intake muffler chamber to the exhaust muffler chamber. The muffler box is provided with an air inlet communicating with the intake muffler chamber and an exhaust port communicating with the exhaust muffler chamber, thereby greatly reducing the kinetic energy of the exhaust gas when it is discharged through the exhaust port, thus reducing the exhaust pressure of the oxygen generator. The noise generated during exhaust is reduced; at the same time, because multiple silencers are arranged sequentially along the circumference of the silencer box, and two adjacent silencers are respectively the intake silencer and the exhaust silencer, the exhaust gas will flow along the circumference of the silencer box inside the silencer box, thereby increasing the flow path of the exhaust gas in the silencer box, thereby further reducing the kinetic energy of the exhaust gas, and maximizing the extension of the exhaust gas flow path while keeping the volume of the silencer box unchanged, thus greatly improving the noise reduction effect of the exhaust silencer on exhaust, thereby improving the user experience.

[0040] 2. In this application, the remaining silencing chamber among the multiple silencing chambers is a process silencing chamber. At least two process silencing chambers are provided, which increases the number of times the exhaust gas undergoes diffusion motion in the silencing box, thereby further reducing the kinetic energy of the exhaust gas when it is discharged through the exhaust port, and further improving the noise reduction effect of the exhaust muffler on the exhaust, so as to further improve the user experience. At the same time, the volume of each silencing chamber can be reduced without changing the volume of the silencing box, so as to increase the distribution density of the partition ribs inside the silencing box. This increases the structural strength of the silencing box to improve the service life of the exhaust muffler, and increases the number of times the exhaust gas can impact the partition ribs, thereby further reducing the kinetic energy of the exhaust gas, and further improving the noise reduction effect of the exhaust silencing chamber on the exhaust gas.

[0041] 3. The muffler box itself has multiple partition ribs inside, which together divide the internal space of the muffler box into an intake muffler chamber, an exhaust muffler chamber, and a process muffler chamber. This simplifies the structural design of the muffler box, reduces the production difficulty of the muffler box, and thus reduces the production and manufacturing cost of the exhaust muffler. Attached Figure Description

[0042] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0043] Figure 1 This is a schematic diagram of the exhaust muffler described in one embodiment of this application;

[0044] Figure 2This is an exploded structural diagram of the exhaust muffler described in one embodiment of this application;

[0045] Figure 3 This is a cross-sectional view of the exhaust muffler described in one embodiment of this application;

[0046] Figure 4 This is a schematic diagram of the structure of the housing described in one embodiment of this application;

[0047] Figure 5 This is a schematic diagram of the housing structure from another perspective in one embodiment of this application;

[0048] Figure 6 This is a schematic diagram of the structure of the cover body according to one embodiment of this application;

[0049] Figure 7 This is a schematic diagram of the exhaust muffler described in one embodiment of this application, mainly showing another arrangement of the intake connector;

[0050] Figure 8 This is a schematic diagram of the exhaust muffler described in one embodiment of this application, mainly showing another relative positional relationship between the cover and the shell;

[0051] Figure 9 This is a schematic diagram of the exhaust muffler described in one embodiment of this application, mainly showing another relative positional relationship between the cover and the shell;

[0052] Figure 10 This is a schematic diagram of the exhaust muffler described in one embodiment of this application, mainly showing another relative positional relationship between the cover and the shell.

[0053] Figure label:

[0054] 1. Silencer box; 11. Housing; 111. Air inlet connector; 112. First partition rib; 113. Second partition rib; 114. Third partition rib; 115. Fourth partition rib; 116. Connecting hole; 117. Connecting pipe; 118. Positioning rib; 119. Reinforcing protrusion; 1191. Fixing hole; 1192. Sealing rib; 12. Cover; 121. Exhaust hole; 122. Matching rib; 123. Edge; 124. Positioning groove; 125. Sealing groove; 2. Air inlet silencer chamber; 3. Exhaust silencer chamber; 4. Process silencer chamber; 5. Silencer component. Detailed Implementation

[0055] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0056] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0057] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0058] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0059] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "a particular embodiment," "example," or "specific example," etc., indicate that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0060] Reference Figures 1 to 10 An exhaust muffler is disclosed, comprising a muffler box 1, the interior of which has an air-containing cavity, the air-containing cavity comprising a plurality of muffler chambers arranged sequentially along the circumference of the muffler box 1, wherein two adjacent muffler chambers are an intake muffler chamber 2 and an exhaust muffler chamber 3, the plurality of muffler chambers being sequentially connected from the intake muffler chamber 2 to the exhaust muffler chamber 3 along the circumference of the muffler box 1, and the muffler box 1 being provided with an air inlet communicating with the intake muffler chamber 2 and an exhaust port 121 communicating with the exhaust muffler chamber 3.

[0061] It is understandable that there are at least three silencers, with two adjacent silencers being the intake silencer 2 and the exhaust silencer 3, and the remaining silencer being the process silencer 4.

[0062] It should be noted that the above-mentioned "multiple muffler chambers are connected sequentially from the intake muffler chamber 2 to the exhaust muffler chamber 3 along the circumference of the muffler box 1" means that the exhaust muffler chamber 3 is connected to the exhaust muffler chamber 3 through the process muffler chamber 4. That is, the exhaust gas in the intake muffler chamber 2 cannot directly enter the exhaust muffler chamber 3, and the exhaust gas in the intake muffler chamber 2 can only enter the exhaust muffler chamber 3 through the process muffler chamber 4.

[0063] When using the exhaust silencer in this application, the exhaust pipe of the oxygen generator is connected to the air inlet so that when the oxygen generator is venting, the exhaust gas discharged by the oxygen generator enters the air intake silencer chamber 2 through the air inlet, and then the exhaust gas passes through multiple silencer chambers along the circumference of the silencer box 1 from the air intake silencer chamber 2 and finally enters the exhaust silencer chamber 3. The exhaust gas entering the exhaust silencer chamber 3 is finally discharged through the exhaust port 121.

[0064] Since the gas chamber includes multiple silencers, and the exhaust gas undergoes diffusion after entering each silencer, the kinetic energy of the exhaust gas when it is discharged through the exhaust port 121 is greatly reduced, thereby reducing the noise generated by the oxygen generator when it exhausts.

[0065] Meanwhile, since multiple silencers are arranged sequentially along the circumference of the silencer box 1, and two adjacent silencers are respectively the intake silencer box 2 and the exhaust silencer box 3, the exhaust gas will flow along the circumference of the silencer box 1 inside the silencer box 1, thereby increasing the flow path of the exhaust gas in the silencer box 1, thereby further reducing the kinetic energy of the exhaust gas, and maximizing the extension of the flow path of the exhaust gas while keeping the volume of the silencer box 1 unchanged, thus greatly improving the noise reduction effect of the exhaust muffler on the exhaust, thereby improving the user experience.

[0066] This application does not specify the number of process silencing cavities 4; preferably, refer to... Figure 4 The remaining silencing chamber among the multiple silencing chambers is the process silencing chamber 4, and at least two process silencing chambers 4 are provided.

[0067] It is understandable that the two adjacent process mufflers 4 are interconnected. The process muffler 4, which is close to the intake muffler 2 in the circumferential direction of the muffler box 1, is connected to the intake muffler 2. The process muffler 4, which is close to the exhaust muffler 3 in the circumferential direction of the muffler box 1, is connected to the exhaust muffler 3.

[0068] After the exhaust gas from the oxygen generator enters the intake silencer chamber 2 through the air inlet, the exhaust gas will pass through multiple process silencer chambers 4 in sequence along the circumference of the silencer box 1 before entering the exhaust silencer chamber 3. Then, the exhaust gas reduces its kinetic energy after passing through the intake silencer chamber 2, process silencer chamber 4 and exhaust silencer chamber 3, and finally is discharged through the exhaust port 121.

[0069] Since there are at least two process silencers 4, the number of times the exhaust gas diffuses in the silencer box 1 is increased, thereby further reducing the kinetic energy of the exhaust gas when it is discharged through the exhaust port 121, and further improving the noise reduction effect of the exhaust silencer on the exhaust, so as to further improve the user experience.

[0070] Furthermore, since there are at least two process silencers 4, the volume of each silencer can be reduced while keeping the volume of the silencer box 1 unchanged. This increases the distribution density of the partition ribs inside the silencer box 1, thereby increasing the structural strength of the silencer box 1 and improving the service life of the exhaust silencer. On the other hand, it increases the number of times the exhaust gas can impact the partition ribs, further reducing the kinetic energy of the exhaust gas, and thus further improving the noise reduction effect of the exhaust silencer 3 on the exhaust gas.

[0071] The better one is to refer to Figure 4 There are two process silencers 4, meaning the gas chamber has a total of 4 silencers. The two adjacent silencers are the intake silencer 2 and the exhaust silencer 3, respectively. The remaining two silencers are the process silencers 4. This ensures that the volume of each silencer is maintained without changing the volume of the silencer box 1, so as to ensure the kinetic energy consumption effect of the silencer box 1 on the exhaust gas.

[0072] Of course, in other embodiments, there may be only one process silencing cavity 4.

[0073] This application does not specify the formation method of the silencing cavity; preferably, refer to... Figure 4 The muffler box 1 has multiple partition ribs inside, which together divide the internal space of the muffler box 1 into an intake muffler chamber 2, an exhaust muffler chamber 3, and a process muffler chamber 4.

[0074] It is understandable that the silencer box 1 is a single, integral structure.

[0075] Because the muffler box 1 has multiple partition ribs inside, the structural design of the muffler box 1 is simplified, the production difficulty of the muffler box 1 is reduced, and the production and manufacturing cost of the exhaust muffler is reduced.

[0076] This application does not specify the connection method between two adjacent silencing cavities, which can be any of the following embodiments:

[0077] Example 1, in this example, refers to Figure 4The dividing ribs are provided with connecting holes 116.

[0078] It is understandable that two adjacent silencing cavities are connected by a connecting hole 116 located on the partition rib.

[0079] Because the partition rib is provided with a connecting hole 116, it enables the connection between two adjacent mufflers on the one hand, and simplifies the structural design of the muffler box 1 on the other hand, thereby further reducing the production difficulty of the muffler box 1 and further reducing the production cost of the exhaust muffler.

[0080] Example 2, in this example, refer to Figure 2 and Figure 4 The dividing ribs are equipped with connecting pipes 117.

[0081] It is understandable that two adjacent silencing cavities are connected by a connecting pipe 117 located on the partition rib.

[0082] Because the partition rib is equipped with a connecting pipe 117, it enables the connection between two adjacent silencing chambers on the one hand, and allows sound waves of a specific frequency band to be eliminated in the connecting pipe 117 on the other hand, and further extends the flow path of exhaust gas in the silencing box 1, thereby further improving the noise reduction effect of the exhaust silencing box 1 on exhaust gas.

[0083] This application does not specifically limit the structure of the connecting pipe 117, which can be... Figure 2 and Figure 4 The straight shape shown is to reduce the manufacturing difficulty of the connecting pipe 117, thereby reducing the manufacturing cost of the exhaust muffler. It can also be curved, spiral, or other shapes, as long as it can connect two adjacent muffler chambers. When the exhaust gas passes through the connecting pipe 117, the sound waves of a specific frequency band will be eliminated by the connecting pipe 117 and the flow path of the exhaust gas inside the muffler box 1 will be increased.

[0084] It should be noted that when the connecting pipe 117 is straight, the connecting pipe 117 can be set perpendicular to the partition rib to which it is attached, or it can be set at an angle other than 90° to the partition rib to which it is attached.

[0085] This application does not specifically limit the positional relationship between the connecting pipe 117 and the partition rib to which it is attached. The connecting pipe 117 can be connected to the partition rib at the middle position along its own length, or one end of the connecting pipe 117 can be flush with one side of the partition rib, and the other end of the connecting pipe 117 can protrude from the other side of the partition rib, or even it can be as follows: Figure 4 The connecting pipe 117 shown is set at different lengths at both ends of the dividing rib.

[0086] This application does not specify the material for the connecting pipe 117; it can be made of any material that can form a pipe, such as silicone, polyvinyl chloride, polyurethane, aluminum, or copper.

[0087] In other embodiments, the connection between two adjacent silencers can be a combination of the two embodiments described above; or, the process silencer 4 is connected to the intake silencer 2 through one of the connecting hole 116 and the connecting pipe 117, and the process silencer 4 is connected to the exhaust silencer 3 through the other of the two; or, there is a gap between the end or side of the partition rib and the cavity wall of the air chamber, so that the partition rib and the cavity wall of the air chamber together form a channel connecting two adjacent silencers.

[0088] The better one is to refer to Figure 4 Multiple partition ribs are evenly spaced along the circumference of the muffler box 1 to make each muffler cavity have the same volume, thereby reducing the manufacturing difficulty of the muffler box 1 and further reducing the manufacturing cost of the exhaust muffler.

[0089] This application does not specifically limit the connecting area between two adjacent silencing cavities, which can be any of the following embodiments:

[0090] In Example 1, the partition ribs include a first partition rib 112 located between the intake muffler chamber 2 and the process muffler chamber 4, and a second partition rib 113 located between the process muffler chamber 4 and the exhaust muffler chamber 3. The first partition rib 112 is provided with a first connecting hole, and the second partition rib 113 is provided with a second connecting hole. The diameter of the first connecting hole is equal to the diameter of the second connecting hole.

[0091] Specifically, the partition ribs also include a third partition rib 114 located between two adjacent process mufflers 4 and a fourth partition rib 115 located between the intake muffler 2 and the exhaust muffler 3. The third partition rib 114 is provided with a third connecting hole, the diameter of which is equal to the diameter of the first connecting hole.

[0092] It is understandable that two adjacent silencing cavities are connected by a connecting hole 116, and the connecting areas of the two adjacent silencing cavities are the same.

[0093] Since the diameter of the first connecting hole is equal to the diameter of the second connecting hole and the diameter of the third connecting hole, the production difficulty of the muffler box 1 is further reduced, thereby further reducing the production cost of the exhaust muffler and improving the production efficiency of the exhaust muffler.

[0094] Example 2: In this example, the partition ribs include a first partition rib 112 located between the intake muffler chamber 2 and the process muffler chamber 4, and a second partition rib 113 located between the process muffler chamber 4 and the exhaust muffler chamber 3. The first partition rib 112 is provided with a first connecting hole, and the second partition rib 113 is provided with a second connecting hole. The diameter of the first connecting hole is smaller than the diameter of the second connecting hole.

[0095] Specifically, the partition ribs also include a third partition rib 114 located between two adjacent process mufflers 4 and a fourth partition rib 115 located between the intake muffler 2 and the exhaust muffler 3. The third partition rib 114 is provided with a third connecting hole, the diameter of which is larger than the diameter of the first connecting hole and smaller than the diameter of the second connecting hole.

[0096] It is understandable that two adjacent silencers are connected by a connecting hole 116, and the connecting area of ​​the two adjacent silencers gradually increases along the circumference of the silencer box 1 from the intake silencer 2 to the exhaust silencer 3.

[0097] Since the diameter of the third connecting hole is larger than that of the first connecting hole but smaller than that of the second connecting hole, the walls of the first, second and third connecting holes can be used to eliminate sound waves of different frequency bands, thereby further improving the noise reduction effect of the exhaust muffler on exhaust gas.

[0098] In Example 3, the partition ribs include a first partition rib 112 located between the intake muffler 2 and the process muffler 4, a second partition rib 113 located between the process muffler 4 and the exhaust muffler 3, a third partition rib 114 located between two adjacent process mufflers 4, and a fourth partition rib 115 located between the intake muffler 2 and the exhaust muffler 3. The first partition rib 112 is provided with a first connecting pipe, the second partition rib 113 is provided with a second connecting pipe, and the third partition rib 114 is provided with a third connecting pipe. The inner diameter of the first connecting pipe is equal to the inner diameter of the second connecting pipe and the inner diameter of the third connecting pipe.

[0099] It is understandable that two adjacent silencing cavities are connected by a connecting pipe 117, and the connecting areas of the two adjacent silencing cavities are the same.

[0100] Since the inner diameter of the first connecting pipe is equal to the inner diameter of the second connecting pipe, the manufacturing difficulty of the muffler box 1 is further reduced, thereby further reducing the manufacturing cost of the exhaust muffler and improving the production efficiency of the exhaust muffler chamber 3.

[0101] Example 4: In this example, the partition ribs include a first partition rib 112 located between the intake muffler 2 and the process muffler 4, a second partition rib 113 located between the process muffler 4 and the exhaust muffler 3, a third partition rib 114 located between two adjacent process mufflers 4, and a fourth partition rib 115 located between the intake muffler 2 and the exhaust muffler 3. The first partition rib 112 is provided with a first connecting pipe, the second partition rib 113 is provided with a second connecting pipe, and the third partition rib 114 is provided with a third connecting pipe. The inner diameter of the third connecting pipe is larger than the inner diameter of the first connecting pipe and smaller than the inner diameter of the second connecting pipe.

[0102] It is understandable that two adjacent silencers are connected by a connecting pipe 117, and the connecting area of ​​two adjacent silencers gradually increases along the circumference of the silencer box 1 from the intake silencer 2 to the exhaust silencer 3.

[0103] Since the inner diameter of the first connecting pipe is smaller than that of the second connecting pipe, the first and second connecting pipes can be used to eliminate sound waves of different frequency bands, thereby further improving the noise reduction effect of the exhaust muffler on exhaust gas.

[0104] In other embodiments, the muffler box 1 can also be a split structure, that is, the muffler box 1 includes multiple air boxes, each air box having an internal space that forms at least an independent muffler cavity, and the multiple air boxes are arranged sequentially along the circumference, with adjacent air boxes connected by a pipe body, so that the muffler box 1 is a modular structure.

[0105] In a preferred embodiment, refer to Figures 1 to 10 The muffler box 1 includes a housing 11 and a cover 12 disposed on the housing 11. The cross-sectional shape of the housing 11 is circular or regular polygonal. The air inlet is disposed on the housing 11 or the cover 12, and the exhaust port 121 is disposed on the housing 11 or the cover 12.

[0106] It is understandable that the shell 11 and the cover 12 together form an air-containing cavity.

[0107] Because the cross-sectional shape of the housing 11 is circular or a regular polygon, the cover 12 and the housing 11 can have multiple mounting directions (e.g., Figure 1 , Figure 8 , Figure 9 and Figure 10 As shown), when the exhaust muffler is adapted to different models of oxygen generators, only the molds of the housing 11 and the cover 12 need to be adjusted to adjust the air intake and exhaust positions. There is no need to redesign the exhaust muffler, which increases the applicability of the exhaust muffler and reduces the development and design cost of the exhaust muffler.

[0108] It should be noted that this application does not specify the exact location of the air intake and exhaust port 121; the air intake can be positioned as follows: Figure 1 As shown, it is disposed on the side of the housing 11, and it is also as follows Figure 7 The end face of the cover 12 shown can even be provided on the end face of the housing 11 or the side face of the cover 12 as needed; the vent 121 can be as follows Figure 1 The air inlet and exhaust port 121 are located on the end face of the cover 12, or even on the end face of the housing 11. The positions of the air inlet and exhaust port 121 can be adjusted according to the model of the oxygen generator.

[0109] This application does not specify the cross-sectional shape of the shell 11, which can be as follows: Figure 1 The image shown is a square, but it can also be a circle, an equilateral triangle, or other regular polygons.

[0110] Furthermore, refer to Figure 4 The housing 11 has a first partition rib 112 and a second partition rib 113 inside. The first partition rib 112 has a connecting hole 116, and the second partition rib 113 has a connecting pipe 117 through it. The thickness of the second partition rib 113 is greater than the thickness of the first partition rib 112.

[0111] It is understood that the first partition rib 112 mentioned here is the first partition rib 112 located between the intake muffler chamber 2 and the process muffler chamber 4 as mentioned above, and the second partition rib 113 mentioned here is the second partition rib 113 located between the process muffler chamber 4 and the exhaust muffler chamber 3 as mentioned above.

[0112] Because the first partition rib 112 is provided with a connecting hole 116, the exhaust gas in the intake silencer 2 can enter the process silencer 4 more smoothly, thereby improving the intake efficiency of the exhaust gas entering the process silencer 4, thus reducing the exhaust resistance of the oxygen generator and improving the exhaust smoothness of the oxygen generator; and because the second partition rib 113 is provided with a connecting pipe 117, and the thickness of the second partition rib 113 is greater than the thickness of the first partition rib 112, the connection area between the connecting pipe 117 and the second partition rib 113 is increased, thereby increasing the stability of the connecting pipe 117, and thus ensuring the noise reduction effect of the exhaust silencer on the exhaust gas.

[0113] Furthermore, refer to Figure 3 , Figure 4 and Figure 6 The cover 12 is provided with a mating rib 122. One of the mating rib 122 and the second partition rib 113 is provided with a positioning groove 124, and the other of the two is provided with a positioning rib 118 extending into the positioning groove 124.

[0114] Since one of the mating ribs 122 and the second partition rib 113 is provided with a positioning groove 124, and the other is provided with a positioning rib 118 extending into the positioning groove 124, the positioning rib 118 and the positioning groove 124 can be used to position the cover 12 and the shell 11, thereby reducing the assembly difficulty of the muffler box 1 and improving the assembly efficiency of the muffler box 1. On the other hand, the positioning rib 118 and the positioning groove 124 can also be used to increase the sealing between the second partition rib 113 and the cover 12, so as to ensure that all the exhaust gas in the process muffler cavity 4 enters the exhaust muffler cavity 3 through the connecting pipe 117, so as to ensure the elimination effect of the connecting pipe 117 on the sound waves of a specific frequency band, thereby ensuring the noise reduction effect of the exhaust muffler on the exhaust gas. Furthermore, the mating rib 122 can also increase the structural strength of the cover 12, thereby extending the service life of the exhaust muffler box 1.

[0115] Preferably, the rib 122 is provided with a positioning groove 124, and the second partition rib 113 is provided with a positioning rib 118.

[0116] Preferably, the housing 11 also has a third partition rib 114 located between two adjacent process mufflers 4 and a fourth partition rib 115 located between the intake muffler 2 and the exhaust muffler 3. The second partition rib 113, the third partition rib 114 and the fourth partition rib 115 have the same thickness. The mating rib 122 is provided in a one-to-one correspondence with the first partition rib 112, the second partition rib 113, the third partition rib 114 and the fourth partition rib 115. The second partition rib 113, the third partition rib 114 and the fourth partition rib 115 are all provided with positioning ribs 118. The mating rib 122 is provided with multiple positioning grooves 124 corresponding to the second partition rib 113, the third partition rib 114 and the fourth partition rib 115 to further increase the sealing performance of the muffler cavity.

[0117] Furthermore, refer to Figure 4 and Figure 5 The first partition rib 112, the second partition rib 113, the third partition rib 114, and the fourth partition rib 115 intersect at one point, and reinforcing protrusions 119 are provided between the first partition rib 112 and the fourth partition rib 115, between the first partition rib 112 and the third partition rib 114, between the third partition rib 114 and the second partition rib 113, and between the second partition rib 113 and the fourth partition rib 115, so that the intersection of the first partition rib 112, the second partition rib 113, the third partition rib 114, and the fourth partition rib 115 and the multiple reinforcing protrusions 119 together form a reinforcing area. The end face of the housing 11 away from the cover 12 is provided with a fixing hole 1191 extending to the reinforcing area, thereby increasing the diameter of the fixing hole 1191 so that the exhaust muffler can be fixed to the oxygen generator with a larger diameter screw, thereby increasing the connection stability between the exhaust muffler and the oxygen generator.

[0118] This application does not specifically limit the connection method between the first partition rib 112, the second partition rib 113, the third partition rib 114, and the fourth partition rib 115 and the housing 11. Preferably, the first partition rib 112, the second partition rib 113, the third partition rib 114, and the fourth partition rib 115 are integrally formed into the housing 11 to reduce the number of parts required for assembly during the production of the muffler box 1, thereby improving the assembly efficiency of the muffler box 1. In other embodiments, the first partition rib 112, the second partition rib 113, the third partition rib 114, and the fourth partition rib 115 can also be removably connected to the housing 11, that is, the first partition rib 112, the second partition rib 113, the third partition rib 114, and the fourth partition rib 115 can be separated from the housing 11.

[0119] This application does not specifically limit the shape of the cover 12; preferably, refer to... Figure 3 and Figure 6 The edge of the cover 12 extends toward the side where the housing 11 is located and is provided with an edge 123. One of the edge 123 and the housing 11 is provided with a sealing groove 125, and the other is provided with a sealing rib 1192 extending into the sealing groove 125.

[0120] It is understood that the edge 123 extends continuously along the circumference of the cover 12, and the shape of the cover 12 is the same as the shape of the shell 11.

[0121] Because the edge of the cover 12 extends toward the side where the housing 11 is located, and a sealing groove 125 is provided on one of the edge 123 and the housing 11, and a sealing rib 1192 extending into the sealing groove 125 is provided on the other, the shape of the cover 12 is the same as the shape of the housing 11, so as to reduce the amount of raw materials required when manufacturing the cover 12, thereby reducing the manufacturing cost of the exhaust muffler box 1. On the other hand, the cooperation between the sealing rib 1192 and the sealing groove 125 can be used to position the housing 11 and the cover 12, so as to reduce the assembly difficulty of the muffler box 1 and improve the production efficiency of the muffler box 1. Furthermore, the cooperation between the sealing groove 125 and the sealing rib 1192 can increase the sealing between the cover 12 and the housing 11, so as to avoid the muffler box 1 from leaking air, thereby further ensuring the noise reduction effect of the exhaust muffler on the exhaust gas.

[0122] Preferably, a sealing groove 125 is provided on the end face of the edge 123 facing the housing 11, and a sealing rib 1192 is provided on the end face of the housing 11 facing the edge 123.

[0123] In other embodiments, the cover 12 may also have a shape with an end face area larger than that of the shell 11, that is, the projection of the shell 11 toward the cover 12 is located inside the cover 12.

[0124] This application does not specify the connection method between the cover 12 and the shell 11, which can be any of the following embodiments:

[0125] Example 1: In this example, the shell 11 and the cover 12 are fixedly connected together by ultrasonic welding to ensure the airtightness between them and improve the production efficiency of the silencer box 1.

[0126] Example 2: In this example, the shell 11 and the cover 12 are fixedly connected together by means of sealant bonding, so as to ensure the sealing between the two and the connection stability.

[0127] In Example 3, a sealing ring is provided between the housing 11 and the cover 12, and one of the cover 12 and the housing 11 is provided with a screw with threads extending into the other, so as to fix the two together by means of the screw, and to use the sealing ring to offset the gap between the two, so as to facilitate the replacement of the components inside the muffler box 1.

[0128] The better one is to refer to Figure 1 An air inlet connector 111 is provided at the air inlet to facilitate the connection between the exhaust pipe of the oxygen generator and the exhaust silencer box 1. Multiple exhaust holes 121 are arranged in an array to ensure the smooth exhaust of the exhaust silencer box 1. The diameter of each exhaust hole 121 is 0.5mm-2mm, so that the airflow can be dispersed through the array of exhaust holes 121, thereby suppressing the generation of high-frequency noise.

[0129] This application does not specifically limit the material used to manufacture the muffler box 1. Preferably, the muffler box 1 is made of engineering plastic to reduce the weight of the exhaust muffler, thereby facilitating weight reduction and lowering the manufacturing cost. In other embodiments, the muffler box 1 may also be made of other materials.

[0130] In a preferred embodiment, refer to Figure 2 and Figure 3 The silencer box 1 is provided with a silencer 5 made of silencer material inside, and the silencer 5 fills at least a part of the air cavity.

[0131] Since the muffler 5 fills at least a portion of the air chamber, it can absorb, reflect, and attenuate the sound waves of the exhaust gas, thereby effectively reducing the low-to-medium frequency noise generated by the exhaust gas and further improving the noise reduction effect of the exhaust muffler on the exhaust gas.

[0132] This application does not specify a particular sound-absorbing material; preferably, the sound-absorbing material has a density of 15-35 kg / m³. 3Polyurethane foam is used to improve the noise reduction effect of the exhaust muffler on low and mid-frequency sound waves. In other embodiments, the sound-absorbing material can also be a porous material such as non-woven felt, glass fiber, or sintered plastic.

[0133] Preferably, each silencer cavity is filled with a silencer component 5 to further improve the noise reduction effect of the exhaust silencer on exhaust gas.

[0134] In summary, when the exhaust muffler of this application is working, the exhaust gas enters the gas chamber through the air inlet, passes through multiple muffler chambers in sequence, and is finally discharged through the exhaust port 121. When the exhaust gas passes through multiple muffler chambers in sequence, the multiple muffler chambers perform graded processing of broadband noise. The muffler 5 absorbs low- and mid-frequency noise, and the exhaust port 121 suppresses the generation of high-frequency noise, so as to achieve processing of noise in different frequency bands.

[0135] This application discloses an oxygen generator that includes an exhaust silencer as described above.

[0136] Specifically, the oxygen generator has an adsorption tower, the adsorption tower has an exhaust pipe, and the air inlet connector 111 of the exhaust silencer is connected to the exhaust pipe of the adsorption tower so that the exhaust gas discharged from the adsorption tower enters the interior of the silencer box 1 through the exhaust pipe.

[0137] Because the oxygen concentrator in this application uses the aforementioned exhaust silencer, the noise generated by the oxygen concentrator during exhaust is reduced, thereby improving the user experience and reducing the design and development costs of the oxygen concentrator.

[0138] This application does not specify the connection method between the intake connector 111 and the exhaust pipe. The two can be connected by threaded connection, quick-connect interface, adhesive bonding, hose sleeve or other connection methods.

[0139] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0140] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0141] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. An exhaust muffler, characterized in that, The device includes a muffler box (1), the interior of which has an air-containing cavity. The air-containing cavity includes a plurality of muffler chambers arranged sequentially along the circumference of the muffler box (1). Two adjacent muffler chambers are an intake muffler chamber (2) and an exhaust muffler chamber (3), respectively. The plurality of muffler chambers are connected sequentially along the circumference of the muffler box (1) from the intake muffler chamber (2) to the exhaust muffler chamber (3). The muffler box (1) is provided with an air inlet communicating with the intake muffler chamber (2) and an exhaust port (121) communicating with the exhaust muffler chamber (3).

2. The exhaust muffler according to claim 1, characterized in that, The remaining silencing cavity among the plurality of silencing cavities is the process silencing cavity (4), and at least two process silencing cavities (4) are provided.

3. An exhaust muffler according to claim 2, characterized in that, The muffler box (1) has multiple partition ribs inside, which together divide the internal space of the muffler box (1) into the intake muffler chamber (2), the exhaust muffler chamber (3), and the process muffler chamber (4).

4. An exhaust muffler according to claim 3, characterized in that, The dividing rib is provided with a connecting hole (116); And / or, the partition rib is provided with a connecting pipe (117).

5. An exhaust muffler according to claim 3, characterized in that, The partition ribs include a first partition rib (112) located between the intake muffler chamber (2) and the process muffler chamber (4) and a second partition rib (113) located between the process muffler chamber (4) and the exhaust muffler chamber (3). The first partition rib (112) is provided with a first connecting hole (116), and the second partition rib (113) is provided with a second connecting hole (116). The diameter of the first connecting hole (116) is equal to or smaller than the diameter of the second connecting hole (116). And / or, the first partition rib (112) is provided with a first connecting pipe (117), the second partition rib (113) is provided with a second connecting pipe (117), and the inner diameter of the first connecting pipe (117) is equal to or less than the inner diameter of the second connecting pipe (117).

6. An exhaust muffler according to any one of claims 1-5, characterized in that, The silencer box (1) includes a housing (11) and a cover (12) disposed on the housing (11). The cross-sectional shape of the housing (11) is circular or regular polygonal. The air inlet is disposed on the housing (11) or the cover (12), and the exhaust port (121) is disposed on the housing (11) or the cover (12).

7. An exhaust muffler according to claim 6, characterized in that, The housing (11) is provided with a first partition rib (112) and a second partition rib (113). The first partition rib (112) is provided with a connecting hole (116), and the second partition rib (113) is provided with a connecting pipe (117). The thickness of the second partition rib (113) is greater than the thickness of the first partition rib (112).

8. An exhaust muffler according to claim 7, characterized in that, The cover (12) is provided with a mating rib (122), and one of the mating rib (122) and the second partition rib (113) is provided with a positioning groove (124), and the other of the two is provided with a positioning rib (118) extending into the positioning groove (124).

9. An exhaust muffler according to claim 6, characterized in that, The edge of the cover (12) extends toward the side where the housing (11) is located and is provided with an edge (123). One of the edge (123) and the housing (11) is provided with a sealing groove (125), and the other is provided with a sealing rib (1192) extending into the sealing groove (125).

10. An exhaust muffler according to any one of claims 1-5, characterized in that, The silencing box (1) is provided with a silencing component (5) made of silencing material inside, and the silencing component (5) fills at least a portion of the air cavity.

11. An oxygen generator, characterized in that, Includes the exhaust muffler as described in any one of claims 1-10 above.

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