An oxygen generator exhaust silencer

Abstract

The present invention relates to the technical field of oxygen production equipment, and specifically to an oxygen generator exhaust silencer, comprising an outer shell and an air inlet pipe and an air outlet pipe connected to the outer shell, and also comprising: when the device is performing silencing, when the air pressure reaches a fixed value, the silencer inner tube will be pushed to move relative to the silencer outer tube, and at the same time, the silencer holes on the silencer inner tube will be leaked to balance the air pressure in the silencer outer tube, so as to achieve the effect of automatically adjusting the number of silencer holes according to the different gas amounts discharged by the oxygen generator, thereby avoiding as much as possible the problem that when the air pressure in the exhaust silencer increases, the air flow velocity through the silencer holes will increase, making the silencing effect of the air flow worse. At the same time, the device adopts a design of resetting with the gravity of the silencer inner tube itself as the power, ensuring that the air pressure in the cavity formed by the silencer outer tube and the silencer inner tube tends to be stable when the silencer inner tube moves, thereby ensuring as much as possible that the air flow velocity through the silencer holes is always consistent, so as to always be close to a perfect silencing state.

Description

Technical Field

[0001] The present invention relates to the technical field of oxygen production equipment, and particularly to an exhaust silencer for an oxygen generator. Background Art

[0002] An oxygen generator uses air separation technology. Through molecular sieve adsorption and powered by an oil-free compressor, it separates nitrogen from oxygen to produce high-concentration oxygen. It has fast oxygen production, high concentration, is suitable for oxygen therapy and health care of various populations, and is energy-saving and efficient. However, the existing mechanical valve separation will generate a large instantaneous noise (usually exceeding 60 decibels) during nitrogen discharge, causing discomfort. Therefore, a silencing device is generally installed at the exhaust pipe of the existing oxygen generator. For example, the porous diffusion muffler in the prior art is designed and manufactured based on the principle that after the steam quantity diffuses through the pores, both the speed and the stagnation pressure will decrease. After the gas diffuses through the pores, the pressure decreases and the flow rate is reduced by diffusion, correspondingly weakening the intensity of the radiated noise. However, in the actual use process of the existing exhaust vent silencer, since the air flow rate in the exhaust pipe of the oxygen generator is not fixed, and the silencing holes often adopt a specific size design, when the exhaust flow rate in the pipe exceeds the design standard of the exhaust vent silencer, the air pressure in the exhaust silencer becomes larger, and the air flow rate through the silencing holes will increase, resulting in a poor silencing effect on the air flow. For this reason, we propose an exhaust silencer for an oxygen generator. Summary of the Invention

[0003] One technical problem to be solved by the present application is: how to design a silencer that can automatically adjust the number of silencing holes.

[0004] To solve the above technical problem, the embodiment of the present application provides an exhaust silencer for an oxygen generator, including a housing and an intake pipe and an outlet pipe connected to the housing, and further including:

[0005] A silencing outer tube, fixedly connected inside the housing and in conduction connection with the intake pipe, and a plurality of layers of silencing holes are evenly opened at equal intervals on the silencing outer tube;

[0006] A silencing inner tube, slidably connected inside the silencing outer tube, and silencing holes are also opened on the silencing inner tube. The housing is designed to be placed vertically. When the air pressure in the silencing outer tube increases, it pushes the silencing inner tube to move relative to the silencing outer tube against its own gravity to expose the silencing holes on it;

[0007] A limiting component, arranged on the silencing outer tube and connected to the silencing inner tube. The silencing holes on the silencing inner tube are designed in multiple layers, and are used to limit the moving distance of the silencing inner tube to an integer multiple of the distance between adjacent layers of silencing holes.

[0008] In some embodiments, the limiting component includes a plurality of annular grooves evenly and equidistantly formed on the sound-absorbing inner tube. The plurality of annular grooves correspond to the multi-layer sound-absorbing holes one by one. A retaining pin is slidably connected to the sound-absorbing outer tube. One end of the retaining pin is located in the annular groove and is designed in an arc shape for temporarily locking the sound-absorbing inner tube. A first spring is fixedly connected between one end of the retaining pin and the sound-absorbing outer tube.

[0009] In some embodiments, sound-absorbing cotton is fixedly connected to the inner wall of the outer shell.

[0010] In some embodiments, the sound-absorbing holes on the sound-absorbing inner tube are designed in a spiral arrangement. A spiral part is fixedly connected to the end of the sound-absorbing outer tube for blocking the sound-absorbing holes. A rotating member is arranged inside the sound-absorbing outer tube. Air pressure pushes the sound-absorbing inner tube to move, and at the same time, the rotating member drives the sound-absorbing inner tube to rotate.

[0011] In some embodiments, the rotating member includes a first mounting bracket fixedly connected inside the outer shell. A hollow column is fixedly connected to the first mounting bracket. A round rod body is fixedly connected to the top end of the sound-absorbing inner tube. One end of the round rod body slidably passes through the hollow column, and a spiral groove is formed on the round rod body. A cylindrical protrusion with one end located in the spiral groove is fixedly connected inside the hollow column. When moving the sound-absorbing inner tube, the hollow column is driven to move, so as to drive the cylindrical protrusion to slide along the spiral groove, so that the sound-absorbing inner tube rotates.

[0012] The present invention has at least the following beneficial effects:

[0013] 1. When the device performs sound absorption, when the gas discharged by the oxygen generator increases, the air pressure inside the sound-absorbing inner tube will increase. Then, when the air pressure reaches a certain value, it will push the sound-absorbing inner tube to move relative to the sound-absorbing outer tube, and at the same time, the sound-absorbing holes on the sound-absorbing inner tube will be exposed to balance the air pressure inside the sound-absorbing outer tube. Thus, the effect of automatically adjusting the number of sound-absorbing holes according to the different gas volumes discharged by the oxygen generator is achieved. Furthermore, the problem that when the air pressure inside the exhaust muffler increases, the flow velocity of the air flow passing through the sound-absorbing holes will increase, resulting in a poor sound-absorbing effect on the air flow, is avoided as much as possible.

[0014] 2. The device adopts a design that uses the self-gravity of the sound-absorbing inner tube as the power for resetting, ensuring that the air pressure in the cavity formed by the sound-absorbing outer tube and the sound-absorbing inner tube tends to be stable when the sound-absorbing inner tube moves. Thus, it is ensured as much as possible that the flow velocity of the air flow passing through the sound-absorbing holes is always the same, so as to always be close to the perfect sound-absorbing state.

[0015] 3. The device temporarily fixes the moved sound-absorbing inner tube through the cooperation of the annular groove and the retaining pin, thus avoiding the sound-absorbing holes being in a semi-leaking state as much as possible, and further reducing its sound-absorbing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0017] Figure 2 For the present invention Figure 1 Schematic diagram of the sectional structure;

[0018] Figure 3 For the present invention Figure 2 Schematic diagram of the sectional structure;

[0019] Figure 4 For the present invention Figure 3 Schematic diagram of the structure of area A in the present invention;

[0020] Figure 5 Schematic diagram of the structure of Embodiment 2 of the present invention;

[0021] Figure 6 For the present invention Figure 5 Schematic diagram of the sectional structure;

[0022] Figure 7 Schematic diagram of the structure of Embodiment 3 of the present invention;

[0023] Figure 8 For the present invention Figure 7 Schematic diagram of the sectional structure;

[0024] Figure 9 For the present invention Figure 8 Schematic diagram of the structure of area B in the present invention;

[0025] Figure 10 For the present invention Figure 8 Schematic diagram of the sectional structure.

[0026] In the figure: 1 - outer shell; 11 - intake pipe; 12 - exhaust pipe; 2 - sound - proof outer pipe; 3 - sound - proof holes; 4 - sound - proof inner pipe; 5 - limiting component; 41 - annular groove; 42 - retaining pin; 43 - first spring; 44 - sound - proof cotton; 45 - spiral part; 46 - rotating part; 47 - first mounting bracket; 48 - hollow column; 49 - round rod body; 51 - spiral groove; 52 - cylindrical protrusion; 53 - fan; 54 - second shaft; 55 - transmission part; 56 - piston plate; 57 - docking component; 58 - second mounting bracket; 59 - third shaft; 61 - synchronous pulley; 62 - guide rod; 64 - fourth shaft; 65 - mounting plate; 66 - first gear disk; 67 - fifth hollow shaft; 68 - second gear disk; 69 - sliding protrusion; 71 - sliding groove; 72 - tension spring; 73 - third gear disk; 74 - fourth gear disk. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] Example 1: Please refer to Figures 1 - 4 , the present invention provides a technical solution: an oxygen generator exhaust silencer, including a housing 1 and an intake pipe 11 and an outlet pipe 12 fixedly and conductively connected to the housing 1, and further including:

[0029] A silencing outer tube 2, fixedly connected inside the housing 1 and conductively connected to the intake pipe 11, and a plurality of layers of silencing holes 3 are evenly and equidistantly arranged on the silencing outer tube 2;

[0030] A silencing inner tube 4, slidably connected inside the silencing outer tube 2, and silencing holes 3 are also provided on the silencing inner tube 4, and the housing 1 is designed to be placed vertically, and the silencing inner tube 4 is designed with a light material to reduce its own gravity, and the air pressure inside the silencing outer tube 2 increases to push the silencing inner tube 4 to move relative to the silencing outer tube 2 after overcoming its own gravity to expose the silencing holes 3 thereon;

[0031] A limiting component 5, arranged on the silencing outer tube 2 and connected to the silencing inner tube 4, for limiting the moving distance of the silencing inner tube 4 to an integer multiple of the distance between adjacent two layers of silencing holes 3;

[0032] Specifically, when the device is silencing, when the gas discharged by the oxygen generator increases, it will cause the air pressure inside the silencing inner tube 4 to increase, and then when the air pressure reaches a certain value, it will push the silencing inner tube 4 to move relative to the silencing outer tube 2, and at the same time expose the silencing holes 3 on the silencing inner tube 4 to balance the air pressure inside the silencing outer tube 2, so as to achieve the effect of automatically adjusting the number of silencing holes 3 according to the different amounts of gas discharged by the oxygen generator, and further avoid as much as possible the problem that when the air pressure inside the exhaust silencer becomes larger, the flow rate of the air flow passing through the silencing holes 3 will increase, resulting in a poor silencing effect on the air flow. At the same time, the device adopts a design that uses the self-gravity of the silencing inner tube 4 as the power to reset, ensuring that the air pressure in the cavity formed by the silencing outer tube 2 and the silencing inner tube 4 tends to be stable when the silencing inner tube 4 moves, so as to ensure as much as possible that the flow rate of the air flow passing through the silencing holes 3 is always the same, so as to always be close to the perfect silencing state. At the same time, the moved silencing inner tube 4 is temporarily fixed by the cooperation of the annular groove 41 and the pin 42, so as to avoid as much as possible the silencing holes 3 being in a semi-leaking state, thereby reducing its silencing effect.

[0033] The silencer hole 3 on the silencer inner tube 4 adopts a multi-layer design, and the limiting component 5 includes a plurality of annular grooves 41 equidistantly and evenly arranged on the silencer inner tube 4, and the plurality of annular grooves 41 correspond one to one to the multi-layer silencer holes 3. A bayonet pin 42 is slidably connected to the silencer outer tube 2, and one end of the bayonet pin 42 is located in the annular groove 41 and adopts an arc-shaped design, which is used to temporarily lock the silencer inner tube 4. A spring 43 is fixedly connected between one end of the bayonet pin 42 and the silencer outer tube 2. During specific use, when the thrust generated by the air pressure in the cavity formed by the silencer outer tube 2 and the silencer inner tube 4 is greater than the gravity of the silencer inner tube 4 and the friction force between the silencer outer tube 2 and the silencer inner tube 4 and the fixing force of the bayonet pin 42, the silencer inner tube 4 moves out until the bayonet pin 42 is re-engaged in another annular groove 41.

[0034] A sound-absorbing cotton 44 is fixedly connected to the inner wall of the housing 1 to assist in sound reduction and improve the sound reduction effect of the device body.

[0035] Example 2: Please refer to Figures 1 - 6 The present invention provides a technical solution: Example 2 is another specific opening method of the silencer hole 3 on the silencer inner tube 4 in Example 1, and an implementation method of a specific structure derived from this opening method;

[0036] The silencer holes 3 on the silencer inner tube 4 are designed with a spiral arrangement, and a spiral portion 45 is fixedly connected to the end of the silencer outer tube 2 to cover the silencer holes 3. A rotating member 46 is provided in the silencer outer tube 2. The air pressure pushes the silencer inner tube 4 to move, and the rotating member 46 is used to drive the silencer inner tube 4 to rotate. Specifically, when the air pressure pushes the silencer inner tube 4 to extend out of the silencer outer tube 2, the silencer inner tube 4 moves while rotating, so that the silencer holes 3 on the silencer inner tube 4 leak out one by one, thereby avoiding the silencer holes 3 from being in a semi-leaking state as much as possible, thereby reducing its silencer effect.

[0037] The rotating member 46 includes a mounting frame 47 fixedly connected to the inner wall of the outer shell 1, a hollow column 48 fixedly connected to the mounting frame 47, a round rod body 49 fixedly connected to the top of the silencer inner tube 4, one end of the round rod body 49 slides through the hollow column 48, and a spiral groove 51 is provided on the round rod body 49, a cylindrical protrusion 52 with one end located in the spiral groove 51 is fixedly connected in the hollow column 48, and the cylindrical protrusion 52 is slidably connected to the inner wall of the spiral groove 51, and when the silencer inner tube 4 is moved, the hollow column 48 is driven to move, so as to drive the cylindrical protrusion 52 to slide along the spiral groove 51, so that the silencer inner tube 4 rotates.

[0038] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0039] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. An exhaust muffler for an oxygen generator, comprising a housing (1), an intake pipe (11) and an outlet pipe (12) connected to the housing (1), characterized in that: It also includes: A sound-absorbing outer tube (2), fixedly connected inside the housing (1) and in communication connection with the intake pipe (11), and a plurality of layers of sound-absorbing holes (3) are evenly arranged at equal intervals on the sound-absorbing outer tube (2); A sound-absorbing inner tube (4), slidably connected inside the sound-absorbing outer tube (2), and sound-absorbing holes (3) are also provided on the sound-absorbing inner tube (4). The housing (1) is designed to be placed vertically. When the air pressure inside the sound-absorbing outer tube (2) increases, it pushes the sound-absorbing inner tube (4) to move relative to the sound-absorbing outer tube (2) against its own gravity to expose the sound-absorbing holes (3) thereon; A limiting component (5), arranged on the sound-absorbing outer tube (2) and connected to the sound-absorbing inner tube (4). The sound-absorbing holes (3) on the sound-absorbing inner tube (4) are designed in multiple layers, and are used to limit the moving distance of the sound-absorbing inner tube (4) to an integer multiple of the distance between adjacent layers of sound-absorbing holes (3); The limiting component (5) includes a plurality of annular grooves (41) evenly arranged at equal intervals on the sound-absorbing inner tube (4). The plurality of annular grooves (41) correspond to the multiple layers of sound-absorbing holes (3) one by one. A latch (42) is slidably connected to the sound-absorbing outer tube (2). One end of the latch (42) is located inside the annular groove (41) and is designed in an arc shape for temporarily locking the sound-absorbing inner tube (4). A first spring (43) is fixedly connected between one end of the latch (42) and the sound-absorbing outer tube (2).

2. The oxygen generator exhaust muffler according to claim 1, characterized in that: A sound-absorbing cotton (44) is fixedly connected to the inner wall of the housing (1).

3. An oxygen generator exhaust muffler, comprising a housing (1) and an intake pipe (11) and an outlet pipe (12) connected to the housing (1), characterized in that: It also includes: A sound-absorbing outer tube (2), fixedly connected inside the housing (1) and in communication connection with the intake pipe (11), and a plurality of layers of sound-absorbing holes (3) are evenly arranged at equal intervals on the sound-absorbing outer tube (2); A sound-absorbing inner tube (4), slidably connected inside the sound-absorbing outer tube (2), and sound-absorbing holes (3) are also provided on the sound-absorbing inner tube (4). The housing (1) is designed to be placed vertically. When the air pressure inside the sound-absorbing outer tube (2) increases, it pushes the sound-absorbing inner tube (4) to move relative to the sound-absorbing outer tube (2) against its own gravity to expose the sound-absorbing holes (3) thereon: The sound-absorbing holes (3) on the sound-absorbing inner tube (4) are designed in a spiral arrangement. A spiral part (45) is fixedly connected to the end of the sound-absorbing outer tube (2) for covering the sound-absorbing holes (3). A rotating part (46) is arranged inside the sound-absorbing outer tube (2). When the air pressure pushes the sound-absorbing inner tube (4) to move, the rotating part (46) is used to drive the sound-absorbing inner tube (4) to rotate at the same time.

4. The oxygen generator exhaust muffler according to claim 3, characterized in that: The rotating part (46) includes a mounting frame one (47) fixedly connected inside the housing (1). A hollow column (48) is fixedly connected to the mounting frame one (47). The top end of the sound-absorbing inner tube (4) is fixedly connected with a round rod body (49). One end of the round rod body (49) slidably passes through the hollow column (48). A spiral groove (51) is provided on the round rod body (49). A cylindrical protrusion (52) with one end located inside the spiral groove (51) is fixedly connected inside the hollow column (48). When moving the sound-absorbing inner tube (4), it drives the hollow column (48) to move, so as to drive the cylindrical protrusion (52) to slide along the spiral groove (51), so that the sound-absorbing inner tube (4) rotates.

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