CN216666042U

CN216666042U - Noise elimination structure and ventilation treatment equipment

Info

Publication number: CN216666042U
Application number: CN202123010486.1U
Authority: CN
Inventors: 毕唯东; 智建鑫; 易萍虎; 庄志
Original assignee: Xi'an Yenisei Electronic Technology Co ltd
Current assignee: Xi'an Yenisei Electronic Technology Co ltd
Priority date: 2021-12-02
Filing date: 2021-12-02
Publication date: 2022-06-03
Anticipated expiration: 2031-12-02

Abstract

The utility model relates to the field of ventilation treatment equipment, and discloses a noise elimination structure and ventilation treatment equipment. The sound attenuation structure (10) includes: a housing (11), the housing (11) comprising a muffling chamber (110) and an air inlet (111) and an air outlet (112) located at opposite ends of the muffling chamber (110) and communicating with the muffling chamber (110); a fixing plate (12), wherein the fixing plate (12) is arranged in the silencing cavity (110), and the circumferential edge of the fixing plate (12) is tightly contacted with the circumferential wall of the silencing cavity (110); and the noise elimination bodies (13) are cylindrical bodies with a plurality of micro-perforations (131) formed in the peripheral walls and two closed ends, and the noise elimination bodies (13) are arranged on the fixing plate (12) in a penetrating mode in parallel at intervals. The silencing structure has the advantages of good silencing effect, convenience in disassembly and assembly, simple structure, convenience in processing and strong adaptability.

Description

Noise elimination structure and ventilation treatment equipment

Technical Field

The utility model relates to the field of ventilation treatment equipment, in particular to a noise elimination structure and ventilation treatment equipment comprising the same.

Background

The impeller machine is used as a power device and a main mechanical component for component transportation, and is converted into mechanical energy for rotating the impeller through other forms of energy, and the rotating impeller transmits the energy to a continuously flowing medium. Fans have a significant share of turbomachinery, with centrifugal fans and axial fans being the most common fan types.

However, noise generated by high-speed rotation of the fan is radiated to the outside along with a pipeline connected with the fan, and the noise generated by the high-speed rotation of the fan is one of the main measures for noise elimination while the aerodynamic noise of the fan is continuously optimized.

The noise reduction of the pipe is currently based on the improvement of the opening of the inside of the pipe, for example, patent publication No. CN209540302U entitled "a high pressure exhaust vent muffler", which mainly diffuses the air flow through the inner pipe formed by the annular inner wall of the middle part, thereby reducing the noise. Although this construction reduces noise to some extent, it is complicated, especially by the complicated machining and installation of the perforated wall of the intermediate pipe. In addition to this, such a perforated wall tends to accumulate dust so that the silencing effect is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems and provides a noise elimination structure and ventilation treatment equipment comprising the same.

In order to achieve the above object, an aspect of the present invention provides a sound attenuation structure including:

the shell comprises a silencing cavity, and an air inlet and an air outlet which are positioned at two opposite ends of the silencing cavity and are communicated with the silencing cavity;

the fixing plate is arranged in the silencing cavity, and the peripheral edge of the fixing plate is in close contact with the peripheral wall of the silencing cavity; and

the silencer comprises a plurality of silencer bodies, wherein the silencer bodies are cylinders with the circumferential walls provided with a plurality of micro-perforated holes and two closed ends, and the silencer bodies are arranged on the fixing plate in a penetrating mode in parallel at intervals.

Optionally, the micro-perforations are uniformly spaced along the circumferential direction of the sound-damping body and are uniformly arranged in rows along the axial direction of the sound-damping body.

Optionally, the micro-perforations have a pore size of 0.25mm to 2.37 mm.

Optionally, the lengths of the sound attenuation bodies extending out of the two sides of the fixing plate are equal.

Optionally, the material of the noise damper is a metal sheet.

Optionally, the housing is cylindrical, the inner cavity of the housing forms the muffling cavity, and the fixing plate is a circular plate.

Optionally, the silencing structure further comprises two partition plates, the two partition plates are arranged in the shell in parallel and at intervals so as to define the silencing cavity between the two partition plates, the air inlet is formed in one of the partition plates, and the air outlet is formed in the other partition plate.

Optionally, the air inlet and the air outlet are respectively arranged in the center of the corresponding partition plate, and a space is reserved between the two ends of the sound attenuation body and the two partition plates.

Optionally, the inner diameter of the housing is 20.5mm-25.0 mm.

Optionally, the plurality of sound absorbers vertically penetrate through the fixing plate and are distributed at equal angles along the circumferential direction of the fixing plate.

Optionally, the sound-deadening structure still includes intake pipe and outlet duct, the intake pipe connect in the air inlet, the outlet duct connect in the gas outlet.

Optionally, the air inlet pipe and the air outlet pipe are both straight pipes.

In another aspect, the present invention provides a ventilation treatment device comprising the above-described noise elimination structure.

According to the technical scheme, when the silencing structure is used, firstly, airflow enters from the air inlet, and when sound waves enter the larger silencing cavity from the smaller air inlet, the air inlet and the silencing cavity form the expansion air path which has a good effect of eliminating high-frequency noise, so that part of medium-high frequency sound waves in the airflow can be eliminated firstly; when the airflow passes through the plurality of noise elimination bodies connected in parallel, based on the micro-perforation principle, partial middle-frequency noise can be eliminated, and one part of the frequency of the low-frequency noise is pushed to the middle-high frequency; therefore, the sound attenuation structure enables sound waves to be attenuated and eliminated to a certain degree in different frequency bands, and is wide in sound attenuation frequency range, strong in frequency selectivity and good in sound attenuation effect. The silencing structure is convenient to disassemble and assemble, simple in structure, convenient to process and strong in adaptability.

Additional features and advantages of the utility model will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a front view of one embodiment of the sound attenuating structure of the present invention;

FIG. 2 is a left side perspective view of the muffling structure of FIG. 1;

FIG. 3 is a right perspective view of the muffling structure of FIG. 1;

FIG. 4 is a perspective view of the muffling structure of FIG. 1;

fig. 5 is a perspective view of the fixing plate and the muffler body of fig. 4;

FIG. 6 is a front view of FIG. 5;

fig. 7 is a side view of fig. 6.

Description of the reference numerals

10-silencing structure, 11-shell, 110-silencing cavity, 111-air inlet, 112-air outlet, 12-fixing plate, 13-silencing body, 131-micro-perforation, 132-plug, 14-partition plate, 15-air inlet pipe and 16-air outlet pipe.

Detailed Description

The following detailed description of embodiments of the utility model refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

In the present invention, the terms of orientation such as "inside and outside" used herein mean inside and outside with respect to the contour of each member itself, unless otherwise specified.

In one aspect, the present invention provides a sound attenuation structure, where the sound attenuation structure 10 includes:

a housing 11, the housing 11 including a muffling chamber 110 and an air inlet 111 and an air outlet 112 located at opposite ends of the muffling chamber 110 and communicating with the muffling chamber 110;

a fixing plate 12, the fixing plate 12 being disposed in the muffling chamber 110, and a circumferential edge of the fixing plate 12 being in close contact with a circumferential wall of the muffling chamber 110; and

the plurality of sound absorbers 13 are cylindrical bodies having a plurality of micro-perforations 131 formed in the circumferential wall thereof and having both closed ends, and the plurality of sound absorbers 13 are inserted into the fixed plate 12 in parallel and at intervals.

The ends of the muffler body 13 may be closed by plugs 132 (see fig. 5), or may be closed in other ways, such as directly by welding end plates.

According to the technical scheme, when the silencing structure is used, firstly, airflow enters from the air inlet, and when sound waves enter the larger silencing cavity 110 from the smaller air inlet 111, the air inlet 111 and the silencing cavity 110 form an expansion air path which has a good effect of eliminating high-frequency noise, so that part of medium-high frequency sound waves in the airflow can be eliminated firstly; when the air current passes through a plurality of noise elimination bodies 13 which are connected in parallel, based on the principle of micro-perforation, partial middle-frequency noise can be eliminated and a part of the frequency of low-frequency noise can be pushed to middle-high frequency; therefore, the sound attenuation structure enables sound waves to be attenuated and eliminated to a certain degree in different frequency bands, and is wide in sound attenuation frequency range and strong in frequency selectivity.

In addition, since the plurality of noise dampers 13 connected in parallel are separate members, the number of noise dampers 13 can be adjusted according to the acoustic wave characteristics of the ventilation therapy apparatus used in cooperation therewith in actual use, and the ventilation therapy apparatus has wide versatility and replaceability.

In addition, the silencing structure has strong frequency selectivity, so that the silencing structure is particularly suitable for eliminating certain frequency components with particularly high sound pressure level in sound waves, and has a good effect of controlling a frequency range with the resonant frequency as the center.

In the above, the housing 11, the fixing plate 12, and the muffler body 13 are separate members, and are easily attached and detached.

The silencing structure has the advantages of good silencing effect, convenience in disassembly and assembly, simple structure, convenience in processing and strong adaptability.

In the present invention, preferably, as shown in fig. 5 and 6, the plurality of microperforations 131 are arranged at regular intervals in the circumferential direction of the muffler body 13 and in a row in the axial direction of the muffler body 13. For example, as shown in fig. 6, each muffler body 13 is provided with a single circle of 8 micro-perforations, and 6 circles of micro-perforation arrays are axially distributed.

In the present invention, the pore diameter of the microperforations 131 is preferably 0.25mm to 2.37mm, and more preferably 2.37 mm.

In the present invention, the muffler body 13 preferably has the same length extending beyond both sides of the fixing plate 12. The material of the muffler body 13 is a metal plate.

In the present invention, the housing 11 is preferably cylindrical (see fig. 1 to 3), the inner cavity of the housing 11 forms the muffling chamber 110, and the fixing plate 12 is a circular plate (see fig. 4).

Further, as shown in fig. 4, the sound-deadening structure 10 may further include two partition plates 14, the two partition plates 14 being disposed in the housing 11 in parallel and spaced apart from each other to define a sound-deadening chamber 110 therebetween, the air inlet 111 being opened in one of the partition plates 14, and the air outlet 112 being opened in the other partition plate 14.

Referring to fig. 4, the fixing plate 12 and the two partition plates 14 are circular plates and are disposed in the inner cavity of the housing 11 in parallel and spaced apart from each other. The air inlet 111 and the air outlet 112 are respectively arranged in the center of the corresponding partition plate 14, and both ends of the muffler body 13 are spaced from the two partition plates 14.

In the present invention, the inner diameter of the housing 11 is preferably 20.5mm to 25.0 mm. The plurality of sound absorbers 13 are preferably vertically inserted through the fixed plate 12 and equally angularly distributed along the circumferential direction of the fixed plate 12. For example, as shown in fig. 7, three noise dampers 13 are vertically inserted through the fixed plate 12 and are equally angularly distributed along the circumferential direction of the fixed plate 12.

In the present invention, the muffling structure 10 may further include an inlet pipe 15 and an outlet pipe 16, wherein the inlet pipe 15 is connected to the inlet 111, and the outlet pipe 16 is connected to the outlet 112.

Referring to fig. 1-4, the inlet tube 15 and the outlet tube 16 may be straight tubes, the inlet tube 15 is inserted into the air inlet 111, and the outlet tube 16 is inserted into the air outlet 112. The inlet pipe 15 and the outlet pipe 16 are equal-diameter pipes, and the pipe diameter thereof is much smaller than that of the housing 11. The expansion pipeline formed by the air inlet pipe 15 and the shell 11 forms first-stage noise elimination, and three parallel noise elimination bodies 13 in the shell 11 form second-stage noise elimination.

In another aspect, the present invention provides a ventilation therapy device comprising the above-described sound attenuating structure 10.

By adopting the silencing structure 10, the ventilation treatment equipment can greatly reduce the outlet noise of the ventilation treatment equipment.

The ventilation treatment equipment can be a breathing machine, an oxygen therapy instrument and the like.

The ventilation therapy device may further include a main machine, a ventilation pipeline, and a patient interface device (e.g., a respiratory mask, a nasal oxygen tube), the air inlet tube 15 of the sound attenuating structure 10 may be connected to an air outlet of the main machine, the air outlet tube 16 of the sound attenuating structure 10 may be connected to one end of the ventilation pipeline, and the other end of the ventilation pipeline may be connected to the patient interface device.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the utility model. The utility model is not described in detail in order to avoid unnecessary repetition.

In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims

1. A sound-attenuating structure, characterized in that the sound-attenuating structure (10) comprises:

a housing (11), the housing (11) comprising a muffling chamber (110) and an air inlet (111) and an air outlet (112) located at opposite ends of the muffling chamber (110) and communicating with the muffling chamber (110);

a fixing plate (12), wherein the fixing plate (12) is arranged in the silencing cavity (110), and the peripheral edge of the fixing plate (12) is tightly contacted with the peripheral wall of the silencing cavity (110); and

the silencer comprises a plurality of silencer bodies (13), wherein the silencer bodies (13) are cylindrical bodies with the peripheral walls provided with a plurality of micro-through holes (131) and two closed ends, and the silencer bodies (13) are arranged on the fixing plate (12) in a penetrating mode in parallel at intervals.

2. The sound-deadening structure according to claim 1,

the micro-perforations (131) are uniformly arranged at intervals along the circumferential direction of the sound-absorbing body (13) and are uniformly arranged in a row along the axial direction of the sound-absorbing body (13); and/or

The aperture of the micro-perforation (131) is 0.25mm-2.37 mm.

3. The sound-deadening structure according to claim 1,

the lengths of the sound-absorbing bodies (13) extending out of the two sides of the fixing plate (12) are equal, and/or

The noise elimination body (13) is made of metal sheet metal.

4. A sound-deadening structure according to claim 1, wherein the case (11) has a cylindrical shape, an inner cavity of the case (11) forms the sound-deadening chamber (110), and the fixing plate (12) is a circular plate.

5. A sound-damping structure according to claim 4, characterised in that the sound-damping structure (10) further comprises two partitions (14), the two partitions (14) being arranged parallel to each other and spaced apart inside the casing (11) so as to define between them the sound-damping chamber (110), the air inlet (111) opening onto one of the partitions (14) and the air outlet (112) opening onto the other partition (14).

6. A sound-damping structure according to claim 5, characterised in that the inlet (111) and the outlet (112) each open in the centre of a respective one of the partitions (14), the sound-damping body (13) having a spacing between its two ends and both partitions (14).

7. The sound-deadening structure according to claim 4,

the inner diameter of the housing (11) is 20.5mm-25.0mm, and/or

The plurality of noise dampers (13) vertically penetrate through the fixing plate (12) and are distributed at equal angles along the circumferential direction of the fixing plate (12).

8. A sound-attenuating structure according to any one of claims 1-7, characterised in that the sound-attenuating structure (10) further comprises an inlet pipe (15) and an outlet pipe (16), the inlet pipe (15) being connected to the inlet opening (111) and the outlet pipe (16) being connected to the outlet opening (112).

9. A sound-damping arrangement according to claim 8, characterised in that the inlet pipe (15) and the outlet pipe (16) are both straight pipes.

10. A ventilation therapy device, characterized by comprising an anechoic structure (10) according to any one of claims 1 to 9.