Exhaust silencer for oxygen generator and oxygen generator

Abstract

The invention belongs to the technical field of oxygen generators, and particularly relates to an exhaust silencer for an oxygen generator and the oxygen generator. The exhaust silencer for the oxygen generator comprises a silencer body and a spiral silencing pipe, the silencing pipe is a flexible piece, the silencer body is provided with an inner cavity, the silencing pipe is installed in the inner cavity of the silencer body, an air inlet connector and an exhaust connector which correspond to the two axial ends of the silencing pipe are arranged on the silencer body, and the silencing pipe is arranged in the inner cavity of the silencer body. The air inlet end of the hush pipe is communicated with the air inlet connector, the exhaust end of the hush pipe is communicated with the exhaust connector, and the outer wall of the hush pipe abuts against the inner wall of the silencer body. The gas flow is spirally decelerated after entering the hush pipe, and the hush pipe flexibly buffers the nitrogen gas flow, so that the speed of nitrogen discharged from the exhaust interface is reduced, and the noise of the oxygen generator during nitrogen discharge is reduced. According to the exhaust silencer for the oxygen generator, the length of the spiral silencing pipe is large, sufficient speed reduction of high-speed airflow is facilitated, the space occupied by the spiral silencing pipe is small, and the size of the exhaust silencer for the oxygen generator is small.

Description

Technical Field

[0001] The invention belongs to the technical field of oxygen concentrators, and in particular relates to an exhaust muffler for an oxygen concentrator and an oxygen concentrator. Background Art

[0002] Oxygen concentrator is a type of machine that produces oxygen. Its principle is to use the physical adsorption and desorption technology of molecular sieves. The oxygen concentrator is filled with molecular sieves, which can adsorb nitrogen in the air when pressurized. The remaining unabsorbed oxygen is collected and becomes high-purity oxygen after purification. The nitrogen is discharged when the pressure in the molecular sieve is less than a certain pressure. Since the airflow velocity of nitrogen is high when it is discharged, noise will be generated, and the noise level is proportional to the airflow velocity and pressure. In the prior art, an exhaust muffler is generally installed on the oxygen concentrator to reduce noise, improve product performance, and improve user comfort.

[0003] Existing exhaust mufflers are usually filled with silencer cotton in the muffler body. After nitrogen is passed into the exhaust muffler, the numerous micropores in the silencer cotton disperse the airflow, so that the speed of the airflow is reduced to reduce noise.

[0004] However, in order to ensure the silencing effect, a certain amount of silencing cotton needs to be filled in the muffler body, resulting in a larger volume of the exhaust muffler. Summary of the invention

[0005] The technical problem to be solved by the present invention is: to provide an exhaust muffler for an oxygen concentrator and an oxygen concentrator in view of the problem that the existing exhaust muffler has a large volume.

[0006] To solve the above technical problems, on the one hand, an embodiment of the present invention provides an exhaust muffler for an oxygen concentrator, comprising a muffler body and a muffler pipe, wherein the muffler pipe is a flexible part, the muffler body has an inner cavity, the muffler pipe is spiral, and the muffler pipe is installed in the inner cavity of the muffler body, and the muffler body is provided with an air intake interface and an exhaust interface corresponding to the axial ends of the muffler pipe, the air intake end of the muffler pipe is connected to the air intake interface, and the exhaust end of the muffler pipe is connected to the exhaust interface, and the outer wall of the muffler pipe is against the inner wall of the muffler body.

[0007] Optionally, a plurality of pressure relief holes distributed at intervals are provided on each circle of the silencer pipe, and the pressure relief holes allow gas to flow between the silencer body and the silencer pipe.

[0008] Optionally, the plurality of pressure relief holes on each circle of the silencer pipe are located on one side of the silencer pipe.

[0009] Optionally, the plurality of pressure relief holes on each circle of the silencer pipe are located on a side of the corresponding circle away from the air inlet end.

[0010] Optionally, the pressure relief holes penetrate through both radial sides of the muffler pipe.

[0011] Optionally, the inner cavity of the muffler body is cylindrical, the muffler is cylindrical, and the inner diameter of the muffler body is the same as the outer diameter of the muffler pipe.

[0012] Optionally, the air inlet interface is arranged on the top wall of the muffler body, the exhaust interface is arranged on the side wall of the muffler body, the air inlet end of the muffler pipe extends upward along the axial direction of the muffler pipe, and the exhaust end of the muffler pipe extends radially outward.

[0013] Optionally, the muffler body includes a cylinder and a cover body, the top end of the cylinder is an open structure, the cover body covers the top end opening of the cylinder, the air inlet interface is arranged on the cover body, and the exhaust interface is arranged on the side wall of the cylinder.

[0014] Optionally, the cover body is provided with an external thread, the top end of the cylinder body is provided with an internal thread hole, and the cover body is threadedly connected to the cylinder body.

[0015] In the exhaust silencer for oxygen concentrator of the present invention, high-speed and high-pressure nitrogen gas flow enters into the silencer pipe through the air inlet interface on the silencer body and then spirally decelerates. The silencer pipe is a flexible part, and the silencer pipe flexibly buffers the nitrogen gas flow to reduce the speed of nitrogen when it is discharged from the exhaust interface, and reduce the noise when the oxygen concentrator discharges nitrogen. The spiral silencer pipe is long, which is conducive to fully decelerating the high-speed gas flow, and the spiral silencer pipe occupies less space, so that the volume of the exhaust silencer for oxygen concentrator is small.

[0016] On the other hand, an embodiment of the present invention provides an oxygen concentrator, comprising the above-mentioned exhaust muffler for the oxygen concentrator. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an exhaust muffler for an oxygen concentrator provided by one embodiment of the present invention;

[0018] Figure 2 yes Figure 1 A longitudinal cross-sectional view of

[0019] Figure 3 yes Figure 1 Exploded diagram.

[0020] The reference numerals in the specification are as follows:

[0021] 1. Muffler body; 11. Air inlet interface; 12. Exhaust interface; 13. Cylinder body; 14. Cover body; 2. Muffler pipe; 21. Pressure relief hole. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] like Figures 1 to 3 As shown, an embodiment of the present invention provides an exhaust muffler for an oxygen concentrator, including a muffler body 1 and a muffler pipe 2, the muffler pipe 2 is a flexible member, the muffler body 1 has an inner cavity, the muffler pipe 2 is spiral, and the muffler pipe 2 is installed in the inner cavity of the muffler body 1.

[0024] The muffler body 1 is provided with an air inlet interface 11 and an exhaust interface 12 corresponding to the axial ends of the muffler pipe 2. The air inlet end of the muffler pipe 2 is connected to the air inlet interface 11, and the exhaust end of the muffler pipe 2 is connected to the exhaust interface 12. The outer wall of the muffler pipe 2 is against the inner wall of the muffler body 1, so that the inner wall of the muffler body 1 can support the muffler pipe 2 when the airflow passes through the muffler pipe 2, so as to prevent the muffler pipe 2 from shaking in the muffler body 1 and generating noise due to the impact of the airflow.

[0025] When the oxygen concentrator exhaust silencer is working, the air inlet interface 11 and the exhaust interface 12 are connected to the air path in the oxygen concentrator, and the nitrogen in the oxygen concentrator is passed into the silencer pipe 2 through the air inlet interface 11. The high-speed and high-pressure nitrogen gas flow is spirally decelerated in the silencer pipe 2. The silencer pipe 2 is a flexible part that can flexibly buffer the gas flow to reduce the speed of the nitrogen when it is discharged from the exhaust interface 12, and reduce the noise when the oxygen concentrator discharges nitrogen. The spiral silencer pipe 2 is long, which is conducive to fully decelerating the gas flow, and the spiral silencer pipe 2 occupies less space, so that the volume of the oxygen concentrator exhaust silencer is small.

[0026] In addition, when silencer cotton is used for silencing in the prior art, after long-term use, the silencer cotton easily turns into powder and blocks the micropores, resulting in reduced silencing effect and inability to circulate gas. However, the silencer pipe 2 has a higher structural strength and a lower probability of such occurrence. The exhaust silencer for the oxygen generator has a longer life and higher stability.

[0027] In the exhaust silencer for oxygen concentrator of the present invention, high-speed and high-pressure nitrogen gas flow passes through the air inlet interface 11 on the muffler body 1 and then enters the muffler pipe 2 for spiral deceleration. The muffler pipe 2 is a flexible member, and the muffler pipe 2 flexibly buffers the nitrogen gas flow to reduce the speed of nitrogen when it is discharged from the exhaust interface 12, thereby reducing the noise when the oxygen concentrator discharges nitrogen. The spiral muffler pipe 2 is long, which is conducive to fully decelerating the high-speed gas flow, and the spiral muffler pipe 2 occupies less space, so that the volume of the exhaust silencer for oxygen concentrator is small.

[0028] In one embodiment, a plurality of pressure relief holes 21 are arranged at intervals on each circle of the silencer pipe 2 , and the pressure relief holes 21 allow gas to flow between the silencer body 1 and the silencer pipe 2 .

[0029] Specifically, when the oxygen concentrator starts to discharge nitrogen, high-pressure and high-speed air flows into the silencer pipe 2. The air pressure in the silencer pipe 2 is greater than the air pressure in the silencer body 1. A part of the gas is released into the silencer body 1 through the pressure relief hole 21 to reduce the air pressure in the silencer pipe 2 and reduce the noise when the oxygen concentrator discharges nitrogen. After a period of time, the silencer body 1 is filled with nitrogen, and the air pressure in the silencer body 1 is greater than the air pressure in the silencer pipe 2. The gas in the silencer body 1 begins to flow to the silencer pipe 2 through the pressure relief hole 21, and then is discharged to the outside through the exhaust interface 12, so that the flow rate of the original gas in the silencer pipe 2 discharged into the atmosphere is reduced, so as to extend the exhaust time and achieve the purpose of reducing noise.

[0030] In one embodiment, the multiple pressure relief holes 21 on each circle of the silencer pipe 2 are located on one side of the silencer pipe 2 to avoid the situation where too much gas is released into the silencer body 1 when there are too many pressure relief holes 21, causing excessive pressure relief in the silencer pipe 2 and affecting the exhaust speed of the silencer pipe 2.

[0031] In one embodiment, the multiple pressure relief holes 21 on each circle of the silencer 2 are located on the side of the corresponding circle away from the air inlet end, so as to increase the length of the spiral deceleration of the airflow in each circle of the silencer 2, make full use of the spiral deceleration effect of the silencer 2, and help reduce the speed of the gas when it is discharged.

[0032] In one embodiment, the pressure relief hole 21 passes through the radial sides of the silencer pipe 2, so that the gas can flow out of the silencer pipe 2 or enter the silencer pipe 2 from the openings on the radial sides of the silencer pipe 2, thereby increasing the speed of the gas flowing between the silencer body 1 and the silencer pipe 2.

[0033] In one embodiment, the inner cavity of the muffler body 1 is cylindrical, the muffler pipe 2 is cylindrical, and the inner diameter of the muffler body 1 is the same as the outer diameter of the muffler pipe 2, so that the outer wall of the muffler pipe 2 is completely attached to the inner wall of the muffler body 1, so that the muffler body 1 can better support the muffler pipe 2 and reduce the vibration of the muffler pipe 2 in the muffler body 1.

[0034] In one embodiment, the air inlet interface 11 is arranged on the top wall of the muffler body 1, the exhaust interface 12 is arranged on the side wall of the muffler body 1, the air inlet end of the muffler pipe 2 extends upward along the axial direction of the muffler pipe 2, and the exhaust end of the muffler pipe 2 extends radially outward.

[0035] In one embodiment, the air inlet port 11 is formed by extending from the middle position of the top wall of the muffler body 1 along the axial direction of the muffler pipe 2. The air outlet port 12 is formed by extending from the side wall of the muffler body 1 to the radial inside and radial outside of the muffler pipe 2.

[0036] In one embodiment, the muffler body 1 includes a cylinder 13 and a cover 14, the top of the cylinder 13 is an open structure, the cover 14 covers the top opening of the cylinder 13, the air inlet interface 11 is arranged on the cover 14, and the exhaust interface 12 is arranged on the side wall of the cylinder 13. When assembling the exhaust muffler for the oxygen concentrator, the exhaust end of the muffler pipe 2 is first connected to the exhaust interface 12, and then the muffler pipe 2 is placed in the cylinder 13, and then the air inlet end of the muffler pipe 2 is connected to the air inlet interface 11 of the cover 14, and finally the cover 14 is covered on the cylinder 13.

[0037] In one embodiment, the cover body 14 is provided with an external thread, and the top end of the cylinder body 13 is provided with an internal thread hole. The cover body 14 is threadedly connected to the cylinder body 13, which has a simple structure and is easy to install and disassemble.

[0038] In one embodiment, the muffler tube 2 is made of silicone.

[0039] In other embodiments, the material of the silencer pipe 2 may be PCT rubber.

[0040] In other embodiments, the pressure relief hole 21 may be omitted.

[0041] In other embodiments, a pressure relief hole 21 may be provided within the extension range of each circle of the muffler pipe 2 .

[0042] In other embodiments, the plurality of pressure relief holes 21 on each circle of the muffler pipe 2 may be located on a side of the corresponding circle close to the air inlet end.

[0043] In other embodiments, the pressure relief hole 21 may only pass through the outer wall of the muffler pipe 2 .

[0044] In other embodiments, the inner cavity of the muffler body 1 may be square, and the outer wall of the muffler pipe 2 is attached to the side wall of the square inner cavity.

[0045] In other embodiments, the air inlet interface 11 can be set on the side wall of the muffler body 1, and the exhaust interface 12 can be set on the bottom wall of the muffler body. Accordingly, the air inlet end of the muffler pipe 2 extends radially outward, and the exhaust end of the muffler pipe 2 extends downward along the axial direction of the muffler pipe 2.

[0046] In other embodiments, the muffler body 1 may include an upper cylinder 13 and a lower cylinder 13 fixed together, and the upper cylinder 13 and the lower cylinder 13 together form an inner cavity of the muffler body 1 .

[0047] In other embodiments, the cover body 14 and the cylinder body 13 can be connected together by radial screws. For example, a plurality of radial screw holes spaced circumferentially are provided on the cover body 14, and a corresponding plurality of through holes are provided on the cylinder body 13. The radial screws pass through the through holes and engage with the radial screw holes.

[0048] In addition, an embodiment of the present invention provides an oxygen concentrator, comprising the exhaust muffler for the oxygen concentrator of the above embodiment.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An exhaust muffler for an oxygen concentrator, characterized in that: The invention comprises a muffler body (1) and a muffler pipe (2), wherein the muffler pipe (2) is a flexible member, the muffler body (1) has an inner cavity, the muffler pipe (2) is spiral-shaped, and the muffler pipe (2) is installed in the inner cavity of the muffler body (1), and the muffler body (1) is provided with an air intake interface (11) and an exhaust interface (12) corresponding to the axial ends of the muffler pipe (2), the air intake end of the muffler pipe (2) is connected to the air intake interface (11), and the exhaust end of the muffler pipe (2) is connected to the exhaust interface (12), and the outer wall of the muffler pipe (2) abuts against the inner wall of the muffler body (1).

2. The exhaust muffler for oxygen concentrator according to claim 1, characterized in that: A plurality of pressure relief holes (21) distributed at intervals are provided on each circle of the silencer pipe (2), and the pressure relief holes (21) allow gas to flow between the silencer body (1) and the silencer pipe (2).

3. The exhaust muffler for oxygen concentrator according to claim 2, characterized in that: The plurality of pressure relief holes (21) on each circle of the silencer pipe (2) are located on one side of the silencer pipe (2).

4. The exhaust muffler for oxygen concentrator according to claim 3, characterized in that: The plurality of pressure relief holes (21) on each circle of the muffler pipe (2) are located on a side of the corresponding circle away from the air inlet end.

5. The exhaust muffler for oxygen concentrator according to claim 2, characterized in that: The pressure relief hole (21) passes through both radial sides of the muffler pipe (2).

6. The exhaust muffler for an oxygen concentrator according to any one of claims 1 to 5, characterized in that: The inner cavity of the muffler body (1) is cylindrical, the muffler pipe (2) is cylindrical, and the inner diameter of the muffler body (1) is the same as the outer diameter of the muffler pipe (2).

7. The exhaust muffler for an oxygen concentrator according to any one of claims 1 to 5, characterized in that: The air inlet interface (11) is arranged on the top wall of the muffler body (1), the air outlet interface (12) is arranged on the side wall of the muffler body (1), the air inlet end of the muffler pipe (2) extends upward along the axial direction of the muffler pipe (2), and the air outlet end of the muffler pipe (2) extends radially outward.

8. The exhaust muffler for oxygen concentrator according to claim 7, characterized in that: The muffler body (1) comprises a cylinder (13) and a cover (14); the top end of the cylinder (13) is an open structure; the cover (14) covers the top end opening of the cylinder (13); the air inlet interface (11) is arranged on the cover (14); and the air outlet interface (12) is arranged on the side wall of the cylinder (13).

9. The exhaust muffler for oxygen concentrator according to claim 8, characterized in that: The cover body (14) is provided with an external thread, the top end of the cylinder body (13) is provided with an internal thread hole, and the cover body (14) is threadedly connected to the cylinder body (13).

10. An oxygen concentrator, characterized in that: The invention comprises the exhaust muffler for an oxygen concentrator according to any one of claims 1 to 9.

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