Exhaust and noise reduction structure applied to molecular sieve oxygen generator

Abstract

The utility model discloses an exhaust noise reduction structure applied to a molecular sieve oxygenerator, which comprises a noise reduction structure and a pipeline structure communicated with the two ends of the noise reduction structure, and the pipeline structure simultaneously introduces noise gas into the noise reduction structure from the two ends of the noise reduction structure respectively. A sound wave diffraction unit, a sound wave diffusion part, a sound wave counteracting part and an air outlet part are symmetrically arranged in the noise reduction structure from outside to inside with the center line as the symmetry axis. The silencer is reasonable in structural design, nitrogen removal gas switched by the electromagnetic valve is divided into two gas paths through the equivalent three-way pipe, the two gas paths are connected into the silencer body from the left side and the right side of the silencer body respectively, and meanwhile noise neutralization is achieved through interaction of left airflow sound waves and right airflow sound waves in the counteracting cavity through reverse sound waves. When two sound waves with the same waveform and the phase difference of 180 degrees meet, the two sound waves can offset each other, so that the noise reduction effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of oxygen generator, especially to an exhaust noise reduction structure applied to a molecular sieve oxygen generator. BACKGROUND

[0002] The molecular sieve oxygen generator is a kind of machine for making oxygen, is the physical pressure swing adsorption oxygen production technology, and its oxygen production principle is mainly that air compressor makes the oxygen and nitrogen in air pass through molecular sieve, utilizes the difference of the adsorption capacity of molecular sieve to oxygen and nitrogen in air to separate oxygen and nitrogen, to obtain high concentration oxygen.Usually, the oxygen generator includes air inlet, air outlet, air compressor, molecular sieve and the like, air enters air compressor through air inlet, then enters molecular sieve through pipeline for air separation, and nitrogen is screened out, oxygen is output through air outlet, and the oxygen production purpose is achieved.

[0003] Since the air compressor has large noise when working, the noise gas generated by the adsorption tower pressure switching and nitrogen discharge of the oxygen generator is the main source of the maximum noise of the whole system. The use occasion of the oxygen generator is generally hospital or patient's home, and the large noise not only affects the use experience of the patient and normal rest of the patient, but also disturbs others, so how to reduce the noise of the oxygen generator is a problem that all oxygen generator manufacturers pay attention to and need to solve.

[0004] At present, the noise reduction method of the oxygen generator is mainly to add a separation layer or install sound insulation material, which has certain effect, but the sound insulation effect is limited, and the use experience of the patient is still poor. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problem in the prior art, and provides an exhaust noise reduction structure applied to a molecular sieve oxygen generator.

[0006] The utility model adopts the technical scheme that an exhaust noise reduction structure applied to a molecular sieve oxygen generator comprises a noise reduction structure and a pipeline structure in communication with both ends of the noise reduction structure, the pipeline structure simultaneously introduces noise gas into the noise reduction structure from both ends of the noise reduction structure, and the noise reduction structure is internally symmetrically arranged from outside to inside with a sound wave diffraction unit, a sound wave diffusion part, a sound wave cancellation part and an air outlet part with a center line as the symmetric axis.

[0007] Preferably, the pipeline structure comprises a tee pipe, the tee pipe is respectively connected with a first air guide pipe, a second air guide pipe and a third air guide pipe for air inlet, the end of the first air guide pipe is in communication with an external noise gas source, and the ends of the second air guide pipe and the third air guide pipe are respectively in communication with both ends of the noise reduction structure.

[0008] Preferably, the noise reduction structure comprises a muffler body, sound wave diffraction units are respectively inserted at two ends of the muffler body, the sound wave diffraction unit comprises a wrap-around member, an extension member is arranged on the inner wall of the wrap-around member and extends inwardly, the extension member is internally provided with an extension cavity for air intake, and the second air guide pipe and the third air guide pipe are respectively communicated with the inside of the extension cavity through an air inlet member.

[0009] Preferably, the extension member is provided with a diffraction cavity between the outer wall of the extension member and the inner wall of the muffler body, the diffraction cavity is filled with first sound-absorbing cotton for sound absorption, and the end of the extension cavity away from the air inlet member is provided with a diffusion tooth groove for dispersing noise gas.

[0010] Preferably, the sound wave diffusion part comprises a diffusion cavity arranged on the inner side of the extension member, the diffusion cavity is filled with second sound-absorbing cotton for sound absorption, and when the noise gas contacts the second sound-absorbing cotton, part of the noise gas is dispersed by the diffusion tooth groove and then enters the diffraction cavity to be sound-absorbed by the first sound-absorbing cotton.

[0011] Preferably, the sound wave cancellation part comprises a cancellation cavity arranged on the inner side of the diffusion cavity, the cancellation cavity and the diffusion cavity are separated by an interference diffusion plate, the interference diffusion plate is uniformly provided with a plurality of weakening holes for further forming uniform and fine airflow sound waves, and the left and right two streams of noise gas are cancelled by reverse sound waves in the cancellation cavity.

[0012] Preferably, the air outlet part comprises an air outlet member arranged at the bottom of the muffler body and extending downwardly, the air outlet member is internally provided with a gas discharge cavity for discharging gas, the gas discharge cavity is communicated with the inside of the cancellation cavity, and the noise gas after noise reduction is discharged through the gas discharge cavity.

[0013] Compared with the prior art, the utility model has the advantages that: by using the equal three-way pipe, the switched nitrogen gas of the electromagnetic valve is divided into two gas paths, and is respectively connected to the left and right sides of the muffler body, and the left and right two streams of airflow sound waves interact by reverse sound waves in the cancellation cavity to realize the "neutralization" of noise. When two sound waves with the same waveform but with a phase difference of 180 degrees meet, they will cancel each other out, thereby achieving the effect of noise reduction. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is a structure schematic view of the utility model;

[0015] Fig. 2 It is a sectional structure schematic view of the utility model.

[0016] 1, three-way pipe; 2, first air guide pipe; 3, second air guide pipe; 4, third air guide pipe; 5, muffler main body; 6, around the member; 7, extension member; 8, extension cavity; 9, air inlet member; 10, diffraction cavity; 11, first sound-absorbing cotton; 12, diffusion tooth groove; 13, diffusion cavity; 14, second sound-absorbing cotton; 15, offset cavity; 16, interference diffusion plate; 17, weakening hole; 18, air outlet member; 19, air leakage cavity. DETAILED DESCRIPTION

[0017] In the following, a plurality of embodiments of the present application will be disclosed with reference to the drawings. For the purpose of clear illustration, a plurality of practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit the present application. That is, in some embodiments of the present application, these practical details are not necessary. In addition, for the purpose of simplifying the drawings, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0018] It should be noted that all directional indications, such as up, down, left, right, front, back, etc., in the embodiments of the present application are used only to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0019] In addition, in addition to being used to represent the orientation or positional relationship, the above-mentioned terms can also be used to represent other meanings, for example, the term "upper" can also be used to represent a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific circumstances.

[0020] In addition, the terms "mounting", "setting", "provided with", "connecting", "connected", "sleeved" should be understood broadly. For example, it can be fixedly connected, detachably connected, or integrally configured; it can be mechanically connected or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication between two devices, elements or components. The connection mode involved in this paper is prior art and has not been improved. It belongs to the common knowledge of those skilled in the art. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0021] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and does not mean to particularly indicate the order or sequence, nor to limit the present application, but only to distinguish the components or operations described by the same technical terms, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0022] As shown in Figs. 1-2 The utility model provides a kind of exhaust noise reduction structure applied to molecular sieve oxygen generator, including noise reduction structure and with the pipeline structure being communicated with the both ends of noise reduction structure, pipeline structure simultaneously from the both ends of noise reduction structure respectively into noise reduction structure with noise gas;Specifically, noise reduction structure inside is symmetrical with midline as symmetry axis and is arranged with sound wave diffraction unit, sound wave diffusion part, sound wave cancellation part and gas outlet from outside to inside.

[0023] The pipeline structure includes a tee pipe 1, a first air duct 2, a second air duct 3 and a third air duct 4 are connected to the tee pipe 1 for air intake;Specifically, the first air duct 2 is connected to the outside noise source, and the second air duct 3 and the third air duct 4 are connected to the both ends of the noise reduction structure.

[0024] The noise reduction structure includes a muffler body 5, and the sound wave diffraction unit is inserted into the both ends of the muffler body 5, and the sound wave diffraction unit includes a winding member 6, and the inner wall of the winding member 6 extends inwardly to form an extension piece 7;Specifically, the extension piece 7 is provided with an extension cavity 8 for air intake, and the second air duct 3 and the third air duct 4 are connected to the inside of the extension cavity 8 through an air inlet 9.

[0025] The extension piece 7 is connected to the inside of the extension cavity 8 through an air inlet 9.

[0026] The sound wave diffusion part includes a diffusion cavity 13 arranged inside the extension piece 7, and the diffusion cavity 13 is filled with a second sound-absorbing cotton 14 for sound absorption;Specifically, when the noise gas contacts the second sound-absorbing cotton 14, part of the noise gas is dispersed by the diffusion tooth groove 12 and enters the diffraction cavity 10 to be sound-absorbed by the first sound-absorbing cotton 11, and the density of the first sound-absorbing cotton 11 in the diffraction cavity 10 is lower than that of the second sound-absorbing cotton 14 in the diffusion cavity 13.

[0027] The sound wave cancellation part comprises a cancellation cavity 15 arranged inside the diffusion cavity 13, and the cancellation cavity 15 and the diffusion cavity 13 are separated by an interference diffusion plate 16; specifically, the interference diffusion plate 16 is uniformly provided with a plurality of weakening holes 17 for further forming uniform fine airflow sound waves, and the left and right two streams of noise gas are cancelled by reverse sound waves in the cancellation cavity 15.

[0028] The air outlet part comprises an air outlet piece 18 arranged at the bottom of the muffler body 5 and extending downward, and the air outlet piece 18 is internally provided with a gas leakage cavity 19 for gas leakage; specifically, the gas leakage cavity 19 is internally communicated with the cancellation cavity 15, and the noise gas after noise reduction is discharged through the gas leakage cavity 19.

[0029] The working principle of the oxygen generator and the principle of generating noise gas in the nitrogen discharge process are common and easy to think of for those skilled in the art, and are not the focus of the protection of the utility model, so they are not described in detail.

[0030] The working principle of the utility model is as follows: the noise gas generated in the pressure switching and nitrogen discharge of the adsorption tower of the oxygen generator enters the three-way pipe 1 through the first air guide pipe 2, is divided into two air paths in the three-way pipe 1, and is transported to the opposite two directions through the second air guide pipe 3 and the third air guide pipe 4 respectively, so that the noise gas enters the noise reduction structure from the left and right sides of the noise reduction structure for noise reduction, and the noise gas is subjected to noise reduction treatment through the same structure part because the sound wave diffraction unit, the sound wave diffusion part, the sound wave cancellation part and the air outlet part are symmetrically arranged from the outside to the inside in the noise reduction structure with the center line as the symmetry axis.

[0031] The noise gas first enters the extension cavity 8 of the diffuser piece 6 through the air inlet piece 9, then enters the diffusion cavity 13 in the muffler body 5, and when the noise gas meets the second sound-absorbing cotton 14 in the diffusion cavity 13, part of the airflow is dispersed by the diffusion tooth groove 12 arranged at the end of the extension cavity 8 and then enters the diffraction cavity 10 to be diffused and sound-absorbed by the first sound-absorbing cotton 11; the noise gas that is not dispersed after passing through the second sound-absorbing cotton 14 in the diffusion cavity 13 further forms uniform fine airflow sound waves through the weakening holes 17 on the interference diffusion plate 16, the airflow sound waves enter the cancellation cavity 15, and the left and right two streams of airflow sound waves interact through reverse sound waves in the cancellation cavity 15 to realize the "neutralization" of noise, that is, when two sound waves with the same waveform but a phase difference of 180 degrees meet, they will cancel each other out, thereby achieving the effect of noise reduction; the airflow after noise reduction in the cancellation cavity 15 is finally discharged to the outside through the gas leakage cavity 19 in the air outlet piece 18.

[0032] The utility model discloses the advantage lies in: utilize the equal three -way pipe 1, and the switching of electromagnetic valve divides nitrogen -containing gas into two gas paths, is accessed from the left and right sides of muffler main part 5 respectively, and the left and right two gas flow sound waves interact through reverse sound waves in the counter -acting chamber 15, to realize the " neutralization " of noise.

[0033] 1, use multiple noise reduction principle, reduce, offset, isolate exhaust noise;

[0034] 2, utilize the principle of sound wave energy offset, further reduce the final exhaust noise;

[0035] 3, in the smaller space of oxygen -producing machine, realize silencing through a muffler, reduce noise.

[0036] In the description of the present specification, the description of the reference terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the characteristics of different embodiments or examples without contradiction.

[0037] The standard parts used in the utility model can be purchased from the market, and the special-shaped parts can be ordered according to the description and the drawings. The specific connection mode of each part adopts the conventional means of mature bolt, rivet, welding, sticking and the like in the prior art, which will not be described in detail here.

[0038] The above content is only the preferred embodiment of the utility model, for the ordinary skilled in the art, according to the idea of the utility model, various changes and changes can be made in the specific implementation mode and application range, and the content of the specification should not be understood as the limitation of the utility model, any modification, equivalent replacement, improvement, etc. made in the spirit and principle of the utility model should be included in the scope of claims of the utility model.

Claims

1. An exhaust noise reduction structure applied to a molecular sieve oxygen generator, characterized in that: The application relates to a noise reduction structure and pipeline structures in communication with both ends of the noise reduction structure, wherein the pipeline structures simultaneously introduce noise gas from both ends of the noise reduction structure into the noise reduction structure, and the noise reduction structure is symmetrically arranged with a sound wave diffraction unit, a sound wave diffusion part, a sound wave cancellation part and an air outlet part inside the noise reduction structure with a center line as a symmetric axis.

2. The exhaust noise reduction structure applied to a molecular sieve oxygen generator according to claim 1, characterized in that: The pipeline structure comprises a tee pipe, and the tee pipe is connected with a first air guide pipe, a second air guide pipe and a third air guide pipe for air inlet respectively, the end of the first air guide pipe is in communication with a noise gas source outside, and the ends of the second air guide pipe and the third air guide pipe are in communication with both ends of the noise reduction structure respectively.

3. The exhaust noise reduction structure applied to a molecular sieve oxygen generator according to claim 2, characterized in that: The noise reduction structure comprises a muffler main body, and the sound wave diffraction unit is inserted into both ends of the muffler main body, the sound wave diffraction unit comprises a winding member, an extension member is arranged on the inner wall of the winding member and extends inward, the extension member is internally provided with an extension cavity for air inlet, and the ends of the second air guide pipe and the third air guide pipe are in communication with the inside of the extension cavity through an air inlet part respectively.

4. The exhaust noise reduction structure applied to a molecular sieve oxygen generator according to claim 3, characterized in that: The extension member is provided with a diffraction cavity between the outer wall of the extension member and the inner wall of the muffler main body, the diffraction cavity is filled with first sound insulation cotton for sound insulation, and the end of the extension cavity away from the air inlet part is provided with a diffusion tooth groove for dispersing noise gas.

5. The exhaust noise reduction structure applied to a molecular sieve oxygen generator according to claim 4, characterized in that: The sound wave diffusion part comprises a diffusion cavity arranged on the inner side of the extension member, the diffusion cavity is filled with second sound insulation cotton for sound insulation, when the noise gas contacts the second sound insulation cotton, part of the noise gas is dispersed by the diffusion tooth groove and then enters the diffraction cavity to be sound-absorbed by the first sound insulation cotton.

6. The exhaust noise reduction structure applied to a molecular sieve oxygen generator according to claim 5, characterized in that: The sound wave cancellation part comprises a cancellation cavity arranged on the inner side of the diffusion cavity, the cancellation cavity and the diffusion cavity are separated by an interference diffusion plate, the interference diffusion plate is uniformly provided with a plurality of weakening holes for further forming uniform and fine airflow sound waves, and the left and right two streams of noise gas are cancelled by mutual interaction of reverse sound waves in the cancellation cavity.

7. The exhaust noise reduction structure applied to a molecular sieve oxygen generator according to claim 6, characterized in that: The air outlet part comprises an air outlet part arranged on the bottom of the muffler main body and extending downward, the air outlet part is internally provided with a gas discharge cavity for gas discharge, the gas discharge cavity and the cancellation cavity are in communication, and the noise-reduced noise gas is discharged through the gas discharge cavity.

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