Silencer and medical oxygen generator

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a silencer and a medical oxygen generator, which comprise a silencing pipe, a silencing cylinder, first silencing cotton and second silencing cotton, one end of the silencing cylinder is provided with an air inlet, and the other end of the silencing cylinder is provided with an air outlet; the silencing pipe is arranged in the silencing cylinder, the outer wall of the silencing pipe and the inner wall of the silencing cylinder are arranged at an interval, the first end of the silencing pipe is communicated with the air inlet, the second end of the silencing pipe is closed, and the silencing pipe is provided with a plurality of micropores penetrating through the pipe wall of the silencing pipe, so that gas in the silencing pipe flows into the silencing cylinder through the micropores; the first silencing cotton is of a porous structure, so that gas can penetrate through the first silencing cotton, and the silencing pipe is filled with the first silencing cotton; and the second silencing cotton is of a porous structure, so that gas can penetrate through the second silencing cotton, and the second silencing cotton is filled in a gap between the silencing pipe and the silencing barrel. According to the silencer and the medical oxygen generator disclosed by the embodiment of the utility model, the first silencing cotton is used for reducing the speed of gas, so that the noise reduction effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to a muffler and a medical oxygen concentrator. Background Art

[0002] Most existing medical oxygen concentrators use silencers for noise reduction. In general, silencers have a tubular silencer channel pre-processed inside the silencer cotton. The gas flows through the silencer channel to isolate and absorb the noise, thereby achieving a silencer effect.

[0003] The above-mentioned silencer has a significant noise reduction effect when the flow rate is low. However, when the gas flow rate is high, the gas flow rate becomes the main cause of the noise. The pipe-shaped silencer channel does not reduce the gas flow rate, so that the noise generated by the flow rate is not reduced. That is, the silencer of the prior art does not limit the gas flow rate when facing a gas with a high flow rate, and there is a problem of poor noise reduction effect. Summary of the invention

[0004] The technical problem to be solved by the utility model is that: in view of the problem that the muffler of the prior art does not limit the gas flow rate when facing a gas with a high flow rate, and has a poor noise reduction effect, a muffler and a medical oxygen concentrator are provided.

[0005] In order to solve the above technical problems, on the one hand, the embodiment of the utility model provides a muffler,

[0006] Silence pipe, silencer tube, first silencer cotton and second silencer cotton;

[0007] Both ends of the muffler are closed, one end of the muffler is provided with an air inlet, and the other end is provided with an air outlet;

[0008] The silencer pipe is placed in the silencer cylinder, the outer wall of the silencer pipe and the inner wall of the silencer cylinder are spaced apart, the first end of the silencer pipe is connected to the air inlet, the second end of the silencer pipe is closed, and the silencer pipe is provided with a plurality of micropores penetrating the pipe wall, and the gas in the silencer pipe can flow into the silencer cylinder through the micropores;

[0009] The first sound-absorbing cotton is filled in the sound-absorbing pipe, and the second sound-absorbing cotton is filled in the gap between the sound-absorbing pipe and the sound-absorbing cylinder. Both the first sound-absorbing cotton and the second sound-absorbing cotton are sound-absorbing cottons with porous structures.

[0010] Optionally, the density of the first sound-absorbing cotton is lower than the density of the second sound-absorbing cotton.

[0011] Optionally, the silencer comprises a cylinder body and a cover, the cylinder body is a one-way opening structure, and the cover is connected to the cylinder body to close the opening of the cylinder body;

[0012] The silencer pipe comprises a first silencer pipe and a second silencer pipe which are coaxially spliced, wherein the first silencer pipe is fixed on the cover, and the second silencer pipe is fixed on the bottom wall of the cylinder.

[0013] Optionally, the wall thickness of the second silencer pipe decreases gradually along the direction from the bottom of the cylinder to the open end of the cylinder.

[0014] Optionally, a groove is provided at one end of the second silencer pipe close to the first silencer pipe, and an end of the first silencer pipe close to the second silencer pipe abuts against a bottom of the groove.

[0015] Optionally, an air inlet pipe is fixed on the cover, and the air inlet pipe is connected to the inner cavity of the silencer pipe.

[0016] Optionally, an air outlet pipe is provided at the bottom of the silencer, the air outlet pipe is fixed on the side wall of the silencer, and the air outlet pipe is connected to the silencer.

[0017] Optionally, the first sound-absorbing cotton includes a plurality of first sub-sound-absorbing cottons, the first sub-sound-absorbing cottons are cylindrical, and the plurality of first sub-sound-absorbing cottons are closely arranged in the sound-absorbing pipe along the axial direction of the sound-absorbing pipe.

[0018] Optionally, the second sound-absorbing cotton includes a plurality of second sub-sound-absorbing cottons arranged along the axial direction of the sound-absorbing pipe, and the second sub-sound-absorbing cottons are in a tubular shape.

[0019] On the other hand, an embodiment of the present invention further provides a medical oxygen concentrator, comprising the above-mentioned muffler.

[0020] According to the silencer and medical oxygen concentrator of the embodiment of the utility model, the gas enters the silencer pipe from the air inlet, flows into the silencer cylinder through the micropores on the wall of the silencer pipe, and then flows out from the air outlet. The first silencer cotton in the silencer pipe directly faces the gas with too high flow rate, reduces the gas flow rate, and then further reduces the gas flow rate through the micropores. Finally, after flowing into the silencer cylinder, the gas is further reduced in flow rate by the second silencer cotton. Through the above three flow rate reductions, the kinetic energy of the gas itself is reduced, and the noise emitted will also be mostly absorbed by the first silencer cotton and the second silencer cotton. Therefore, compared with the prior art, this embodiment improves the noise reduction effect through three-level noise reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an overall schematic diagram of the muffler provided by the first embodiment of the utility model;

[0022] Figure 2 It is a half-section schematic diagram of a muffler provided in the first embodiment of the utility model;

[0023] Figure 3It is a schematic diagram of an explosion of the muffler provided in the first embodiment of the utility model.

[0024] The reference numerals in the specification are as follows:

[0025] 1. Silencer pipe; 11. First silencer pipe; 12. Second silencer pipe; 13. Groove; 14. Micropore; 2. Silencer cylinder; 21. Air inlet pipe; 22. Air outlet pipe; 23. Cover; 24. Cylinder body; 3. First silencer cotton; 31. First sub-silencer cotton; 4. Second silencer cotton; 41. Second sub-silencer cotton. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0027] First embodiment

[0028] like Figure 1 and Figure 2 As shown, the silencer provided by the first embodiment of the utility model includes a silencer pipe 1, a silencer cylinder 2, a first silencer cotton 3 and a second silencer cotton 4. Both ends of the silencer cylinder 2 are closed, one end of the silencer cylinder 2 is provided with an air inlet, and the other end is provided with an air outlet. The silencer pipe 1 is placed in the silencer cylinder 2, the outer wall of the silencer pipe 1 and the inner wall of the silencer cylinder 2 are arranged at intervals, the first end of the silencer pipe 1 is connected to the air inlet, the second end of the silencer pipe 1 is closed, and the silencer pipe 1 is provided with a plurality of micropores 14 penetrating its pipe wall, so that the gas in the silencer pipe 1 flows into the silencer cylinder 2 through the micropores 14. The first silencer cotton 3 is a porous structure, so that the gas can pass through the first silencer cotton 3, and the first silencer cotton 3 is filled in the silencer pipe 1. The second silencer cotton 4 is a porous structure, so that the gas can pass through the second silencer cotton 4, and the second silencer cotton 4 is filled in the interval between the silencer pipe 1 and the silencer cylinder 2. That is, the first sound-absorbing cotton 3 and the second sound-absorbing cotton 4 in this embodiment are both breathable.

[0029] The gas flow of this embodiment is as follows: the gas enters the silencer pipe 1 from the air inlet, flows into the silencer tube 2 through the micropores 14 on the wall of the silencer pipe 1, and then flows out from the air outlet. The first silencer cotton 3 in the silencer pipe 1 directly faces the gas with too high a flow rate, reduces the gas flow rate, and then further reduces the gas flow rate through the micropores 14. Finally, after flowing into the silencer tube 2, the gas is further reduced in flow rate by the second silencer cotton 4. By reducing the flow rate three times, the kinetic energy of the gas itself is reduced, and the noise emitted will also be mostly absorbed by the first silencer cotton 3 and the second silencer cotton 4. Therefore, compared with the prior art, this embodiment improves the noise reduction effect through three-level noise reduction.

[0030] The first and second sound-absorbing cottons in this embodiment not only have the effect of sound absorption, but also physically block the gas and reduce the gas flow rate, thereby fundamentally reducing the kinetic energy of the gas. When the kinetic energy of the gas is reduced, the wind sound or other noise generated by the gas will be directly reduced. The tubular fluid channel for gas flow formed in the prior art does not reduce the gas flow rate. Compared with the prior art, this embodiment has a good noise reduction effect.

[0031] In this embodiment, the density of the first silencer cotton 3 is lower than the density of the second silencer cotton 4. Specifically, the density of the first silencer cotton 3 is 18 kg / m³, while the density of the second silencer cotton 4 is 35 kg / m³. The density of the first silencer cotton 3 should not be too large, otherwise the flow rate of the gas will be reduced, and the first silencer cotton 3 directly faces the gas. If the density of the first silencer cotton 3 is too large, the impact force of the gas on it is large, so that the life of the first silencer cotton 3 is not long, and personnel need to frequently replace the first silencer cotton, which is not in line with practical use.

[0032] The second muffler cotton 4 arranged outside the muffler pipe 1 is the final muffler means, and the second muffler cotton is close to the outside world, so the density of the second muffler cotton 4 needs to be larger to ensure further noise reduction, so that the noise is reduced to an acceptable range. In addition, the inner surface area of ​​the second muffler cotton 4 is larger, so that the gas can flow into the second muffler cotton 4 from any position on the inner surface of the second muffler cotton 4, or in other words, compared with the gas directly flowing into the first muffler cotton 3 from the position close to the air inlet, the second muffler cotton 4 has a larger area for gas to flow in, so that the second muffler cotton 4 can bear the impact force of the gas more evenly.

[0033] Reference Figure 2 and Figure 3 In this embodiment, the silencer 2 includes a cylinder body 24 and a cover 23. The cylinder body 24 is a one-way opening structure. The cover 23 is connected to the cylinder body 24 to close the opening of the cylinder body 24, so that both ends of the silencer 2 are closed. The silencer pipe 1 includes a first silencer pipe 11 and a second silencer pipe 12 arranged coaxially. The first silencer pipe 11 is fixed on the cover 23, and the second silencer pipe 12 is fixed on the bottom wall of the cylinder body 24. The first silencer pipe 11 and the second silencer pipe 12 are spliced ​​to form the silencer pipe 1.

[0034] The above-mentioned split design of the silencer tube 2 and the silencer cotton is mainly for the convenience of replacing the first silencer cotton 3 and the second silencer cotton 4, so that the silencer in this embodiment can be used multiple times, which is more environmentally friendly and also reduces the cost of use.

[0035] In this embodiment, the cover 23 and the cylinder 24 are connected by screws, so that the cover 23 is detachable, which is convenient for later maintenance and replacement during actual use.

[0036] In this embodiment, a plurality of mounting parts are provided on the outer wall of the silencer 2, and threaded holes are provided on the mounting parts. In this embodiment, the mounting parts and the external device are connected by screws, so that the embodiment can be disassembled from the external device after being damaged at a later time.

[0037] Reference Figure 2 In this embodiment, the wall thickness of the second muffler pipe 12 decreases gradually from the bottom of the cylinder 24 to the open end of the cylinder 24. Referring to the accompanying drawings, it can be seen that the cross section of the second muffler pipe 12 in this embodiment is roughly trapezoidal, wherein the large end of the second muffler pipe 12 is close to the bottom wall of the cylinder 24, and the small end of the second muffler pipe 12 is close to the opening of the cylinder 24. This arrangement makes the structure of the second muffler pipe 12 stable.

[0038] Reference Figure 2 In this embodiment, a groove 13 is provided at one end of the second silencer pipe 12 close to the first silencer pipe 11 , and the end of the first silencer pipe 11 close to the second silencer pipe 12 abuts against the bottom wall of the groove 13 .

[0039] The groove 13 of this embodiment is arranged on the inner wall and the outer wall of the second muffler pipe 12, so that a step is formed at one end of the second muffler pipe 12 close to the first muffler pipe 11, the lateral step surface of the step abuts against the end surface of the first muffler pipe 11, and the vertical step surface of the step fits the outer wall of the first muffler pipe 11, thereby making the first muffler pipe 11 stably placed in the second muffler pipe 12. At the same time, the sealing effect is also improved to a certain extent.

[0040] In other embodiments, a groove 13 is provided on the end surface of the second muffler pipe 12, and the groove 13 has only one opening, which faces the opening of the cylinder 24. In this case, the first muffler pipe 11 can be embedded in the groove 13, so that

[0041] Reference Figure 1 In this embodiment, an air inlet pipe 21 is fixed on the cover 23, and the air inlet pipe 21 is connected to the inner cavity of the muffler pipe 1. Compared with only setting an air inlet, the air inlet pipe 21 can facilitate the docking of subsequent pipelines. The air inlet pipe 21 in this embodiment is a curved pipe. Specifically, the air inlet pipe 21 is L-shaped, one end of the air inlet pipe 21 is fixed on the cover 23, and the other end is used as a connecting end to be connected to an external device.

[0042] Of course, in other embodiments, the air inlet pipe 21 may be S-shaped or a straight pipe, and the shape of the air inlet pipe 21 is selected according to actual needs.

[0043] Similarly, an air outlet pipe 22 is provided at the bottom of the silencer 2 , and the air outlet pipe 22 is fixed on the side wall of the silencer 2 , and the air outlet pipe 22 is connected to the silencer 2 .

[0044] Reference Figure 3In this embodiment, the first silencer cotton 3 includes a plurality of first sub-silencer cottons 31, which are cylindrical, and the plurality of first sub-silencer cottons 31 are arranged in the silencer pipe 1 along the axial direction of the silencer pipe 1. The first silencer cotton 3 is formed by stacking a plurality of first sub-silencer cottons 31. Compared with the integrated first silencer cotton 3, when one of the first sub-silencer cottons 31 has problems such as aging, only the problematic first sub-silencer cotton 31 needs to be replaced. At the same time, when installing the first silencer cotton 3, the contact area between each first sub-silencer cotton 31 and the silencer pipe 1 is small, and the friction is small, which is convenient for personnel to install. The contact surface between the integrated first silencer cotton 3 and the silencer pipe 1 is the sum of the plurality of first sub-silencer cottons 31, so that as the integrated first silencer cotton 3 goes deeper into the silencer pipe 1, the contact area between the first silencer cotton 3 and the first silencer pipe 11 increases, the friction increases, the installation difficulty increases, and it is not convenient to replace and install.

[0045] The second silencer cotton 4 includes a plurality of second-shaped cottons arranged along the axial direction of the silencer tube 1, and the second sub-silencer cotton 41 is tubular. Similarly, the first silencer cotton 3 is composed of a plurality of first sub-silencer cottons 31, and the second silencer cotton 4 in this embodiment is also composed of a plurality of second sub-silencer cottons 41. The second silencer cotton 4 is formed by stacking a plurality of first sub-silencer cottons 41. Compared with the integrated second silencer cotton 4, when one of the second sub-silencer cottons 41 has problems such as aging, it is only necessary to replace the problematic second sub-silencer cotton 41. At the same time, when installing the second silencer cotton 4, the contact area between each second sub-silencer cotton 41 and the silencer tube 1 is small, and the friction is small, which is convenient for personnel to install. The contact surface between the integrated second silencer cotton 4 and the silencer tube 1 is the sum of multiple second sub-silencer cottons 41, so that as the integrated second silencer cotton 4 goes deeper into the silencer tube 2, the contact area between the second silencer cotton 4 and the outer wall of the first silencer tube 11 and the second silencer cotton 4 and the inner wall of the silencer tube increases, the friction force increases, the installation difficulty increases, and it is inconvenient to replace and install.

[0046] In other embodiments, the first sound-absorbing cotton may be of an irregular shape. Since the first sound-absorbing cotton is made of a flexible material, the first sound-absorbing cotton is formed by filling the sound-absorbing tube with a plurality of irregular small pieces and compacting them with other tools. That is, the first sound-absorbing cotton in this embodiment is formed as follows: after a plurality of irregular small pieces are stuffed into the sound-absorbing tube, the first sound-absorbing cotton is compacted with other tools.

[0047] Similarly, the silencer cotton in this embodiment can also be formed by inserting a plurality of irregular small pieces of silencer cotton into the gap between the silencer pipe and the silencer cylinder, and compacting them through other tooling.

[0048] Second embodiment

[0049] The muffler of the second embodiment of the utility model is different from the first embodiment in that the first muffler cotton in this embodiment is integrated. The second muffler cotton in this embodiment can be integrated or formed by a plurality of second muffler cottons in the first embodiment.

[0050] Third embodiment

[0051] The silencer of the third embodiment of the utility model is different from that of the first embodiment in that the length of the silencer pipe in this embodiment is smaller than the depth of the cylinder, one end of the silencer pipe in this embodiment is fixed on the cover, and the other end extends to the bottom wall of the cylinder, and the end of the silencer pipe extending to the bottom wall of the cylinder only abuts against the cylinder to form a closed end, and is not fixedly connected to the cylinder.

[0052] Fourth embodiment

[0053] The silencer of the fourth embodiment of the utility model is different from the first embodiment in that, in the present embodiment, the silencer pipe is a one-way opening structure, one end of the opening of the silencer pipe is detachably fixed on the cover, and the other end is closed. When replacing the first silencer cotton, the silencer pipe can be removed from the cover, and then the first silencer cotton in the silencer pipe can be removed.

[0054] Fifth embodiment

[0055] A fifth embodiment of the present invention further provides a medical oxygen concentrator, comprising the muffler described in any one of the above embodiments.

[0056] 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 principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A muffler, characterized in that: It includes a silencer pipe, a silencer tube, a first silencer cotton and a second silencer cotton; Both ends of the muffler are closed, one end of the muffler is provided with an air inlet, and the other end is provided with an air outlet; The silencer pipe is placed in the silencer cylinder, the outer wall of the silencer pipe and the inner wall of the silencer cylinder are spaced apart, the first end of the silencer pipe is connected to the air inlet, the second end of the silencer pipe is closed, and the silencer pipe is provided with a plurality of micropores penetrating the pipe wall, and the gas in the silencer pipe can flow into the silencer cylinder through the micropores; The first sound-absorbing cotton is filled in the sound-absorbing pipe, and the second sound-absorbing cotton is filled in the gap between the sound-absorbing pipe and the sound-absorbing cylinder. Both the first sound-absorbing cotton and the second sound-absorbing cotton are porous structures.

2. The muffler according to claim 1, characterized in that: The density of the first sound-absorbing cotton is lower than the density of the second sound-absorbing cotton.

3. The muffler according to claim 1, characterized in that: The silencer comprises a cylinder body and a cover, wherein the cylinder body is a one-way opening structure, and the cover is connected to the cylinder body to close the opening of the cylinder body; The silencer pipe comprises a first silencer pipe and a second silencer pipe which are coaxially spliced, wherein the first silencer pipe is fixed on the cover, and the second silencer pipe is fixed on the bottom wall of the cylinder.

4. The muffler according to claim 3, characterized in that: Along the direction from the bottom of the cylinder to the open end of the cylinder, the wall thickness of the second silencer pipe decreases successively.

5. The muffler according to claim 3, characterized in that: One end of the second silencer pipe close to the first silencer pipe is provided with a groove, and the end of the first silencer pipe close to the second silencer pipe abuts against the bottom of the groove.

6. The muffler according to claim 3, characterized in that: An air inlet pipe is fixed on the cover, and the air inlet pipe is connected to the inner cavity of the muffler pipe.

7. The muffler according to claim 1, characterized in that: An air outlet pipe is arranged at the bottom of the muffler, the air outlet pipe is fixed on the side wall of the muffler, and the air outlet pipe is connected to the muffler.

8. The muffler according to claim 1, characterized in that The first sound-absorbing cotton includes a plurality of first sub-sound-absorbing cottons, the first sub-sound-absorbing cottons are cylindrical, and the plurality of first sub-sound-absorbing cottons are closely arranged in the sound-absorbing pipe along the axial direction of the sound-absorbing pipe.

9. The muffler according to claim 1, characterized in that: The second sound-absorbing cotton includes a plurality of second sub-sound-absorbing cottons arranged along the axial direction of the sound-absorbing pipe, and the second sub-sound-absorbing cottons are in a tubular shape.

10. A medical oxygen concentrator, characterized in that: A muffler comprising any one of claims 1 to 9.

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