CN215024279U - Ventilation noise eliminator and ventilation treatment equipment - Google Patents
Ventilation noise eliminator and ventilation treatment equipment Download PDFInfo
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- CN215024279U CN215024279U CN202023121346.7U CN202023121346U CN215024279U CN 215024279 U CN215024279 U CN 215024279U CN 202023121346 U CN202023121346 U CN 202023121346U CN 215024279 U CN215024279 U CN 215024279U
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Abstract
The utility model relates to a treatment facility noise elimination technical field of ventilating discloses a noise eliminator and treatment facility of ventilating. The ventilation noise eliminator comprises a noise elimination shell with a gas flow channel, the flow channel side wall of the gas flow channel comprises a first flow channel side wall and a second flow channel side wall which are oppositely arranged in a first direction, a plurality of first scatterers which extend towards the inside of the gas flow channel and are arranged in a plurality of rows and columns at intervals are arranged on the inner surface of the first flow channel side wall, a plurality of second scatterers which extend towards the inside of the gas flow channel and are arranged in a plurality of rows and columns at intervals are arranged on the inner surface of the second flow channel side wall, and a preset distance is kept between the first scatterers and the second scatterers in the first direction. The specific frequency of a certain interval of the sound waves can be attenuated due to the oscillation in the array structure, so that the effect of reducing the intensity of the frequency interval is achieved, the low-frequency noise of a frequency band to be preset and eliminated is effectively reduced, and the use comfort can be improved when the acoustic wave is assembled in the ventilation treatment equipment.
Description
Technical Field
The utility model relates to a treatment equipment noise elimination technical field of ventilating specifically relates to a noise eliminator and a treatment equipment of ventilating.
Background
In ventilation therapy devices, such as ventilators, an impeller mechanism is typically employed to deliver the flow of gas. The impeller machine is used as a main mechanical component of a power device and gas delivery, and is converted into mechanical energy for rotating the impeller through other forms of energy, and the rotating impeller transmits the energy to continuously flowing gas. Fans are a significant proportion of turbomachines, with centrifugal and axial fans being common fan types.
In the practical use of the breathing machine, the motor of the fan generates certain noise, so that the influence on a patient is caused, and for this reason, the noise generated by the motor in the breathing machine needs to be processed.
The noise reduction box is adopted in the current common noise reduction mode, namely, the noise reduction box with soft wrapping materials and resistive noise reduction materials is arranged in the breathing machine, and the noise reduction box wraps the motor. However, the box body of the noise reduction box is large, so that a large space is occupied inside the respirator, and the size of the respirator becomes large. In addition, the noise reduction box can better process high-frequency noise, but the elimination of low-frequency noise is very limited. In addition, the complexity of the structure of the noise reduction box is very easy to cause the excitation superposition of the sound field inside the box body. This can affect the comfort of the user.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a noise eliminator of ventilating, this noise eliminator of ventilating simple structure to can reduce the low frequency noise of the predetermined elimination frequency channel of wanting effectively, thereby can promote the use travelling comfort of treatment facility of ventilating when assembling in the treatment facility of ventilating.
In order to achieve the above object, the present invention provides a ventilation silencer, which includes a silencing casing having a gas flow channel, the flow channel side wall of the gas flow channel includes a first flow channel side wall and a second flow channel side wall which are arranged oppositely in a first direction, wherein, a plurality of first scatterers which are arranged at intervals of multiple rows and multiple columns are arranged inside the gas flow channel, and a plurality of second scatterers which are arranged at intervals of multiple rows and multiple columns are arranged inside the gas flow channel are arranged on the inner surface of the second flow channel side wall, and the first scatterers and the second scatterers keep a predetermined distance in the first direction.
In the technical scheme, the channel side wall of the gas channel comprises a first channel side wall and a second channel side wall which are oppositely arranged in the first direction, a plurality of first scattering bodies which extend towards the inside of the gas channel and are arranged in rows and columns at intervals are arranged on the inner surface of the first channel side wall to form a first array structure, a plurality of second scattering bodies which extend towards the inside of the gas channel and are arranged in rows and columns at intervals are arranged on the inner surface of the second channel side wall to form a second array structure, and a preset distance is kept between the first scattering bodies and the second scattering bodies in the first direction. Therefore, the airflow can flow through the gas flow channel, and meanwhile, when the sound wave passes through the first array structure and the second array structure in the gas flow channel, the specific frequency (for example, 400Hz to 520Hz, based on the sound wave wavelength of the frequency band) in a certain range of the sound wave can be attenuated due to oscillation in the array structure, so that the effect of reducing the intensity of the frequency range is achieved, therefore, the ventilation and noise elimination device is simple in structure, the low-frequency noise of the frequency band to be eliminated can be effectively reduced, and the use comfort of the ventilation and treatment equipment can be improved when the ventilation and treatment equipment is assembled.
Furthermore, the first runner side wall is a first straight runner side wall, the second runner side wall is a second straight runner side wall, and the first straight runner side wall and the second straight runner side wall are arranged in parallel.
Further, each of the first scatterers and the corresponding each of the second scatterers are arranged in alignment in the first direction.
Further, the length of the silencing shell in the extending direction of the gas flow channel is larger than the width of the cross section of the silencing shell, so that the gas flow channel is formed into a long strip-shaped flow channel; the number of the cross section directions of the gas flow channels is defined as column number, the number of the gas flow channels arranged at intervals in the extending direction is defined as row number, and in the strip-shaped flow channel, the column number is smaller than the row number.
Further, the first scatterer and the second scatterer are solid bodies; alternatively, the first scattering body and the second scattering body are hollow bodies.
Further, the first scattering body and the second scattering body are cylinders.
Further, the first scattering body and the second scattering body are fins, and the fins are oriented in the same direction and arranged perpendicular to the direction of gas flow in the gas flow passage.
Further, the fin includes a cylindrical body and fins projecting oppositely on an outer surface of the cylindrical body, respectively.
Further, the first runner side wall and the second runner side wall are elastic side walls; and/or the outer surfaces of the first scatterer and the second scatterer are elastic outer surfaces.
In addition, the cross section of the sound attenuation shell is rectangular or square.
Further, the predetermined distance can be adjusted.
Still further, at least one of the first diffuser and the second diffuser comprises telescopically nested pipe sections, each of the pipe sections telescoped to adjust the predetermined distance;
and/or the presence of a gas in the gas,
the two flow channel side walls of the gas flow channel, which are connected between the first flow channel side wall and the second flow channel side wall, respectively comprise side wall sections which can be sleeved in a telescopic manner, and each side wall section is telescopic to adjust the preset distance.
Finally, the utility model provides a treatment equipment ventilates, treatment equipment ventilates includes above arbitrary noise eliminator ventilates, wherein, the gas flow way is as the passageway section of treatment equipment ventilates's gas delivery passageway. Thus, as mentioned above, the noise of the ventilation treatment device is obviously reduced, and the overall quality is improved.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic perspective view of a ventilation muffler device according to an embodiment of the present invention;
FIG. 2 is a perspective view of another perspective of the ventilation silencer assembly of FIG. 1;
FIG. 3 is a schematic end view of the vent muffler assembly of FIG. 1;
FIG. 4 is a schematic view of a cut-away view of the vent muffler assembly of FIG. 1 along a gas flow path;
fig. 5 is a schematic structural diagram of a fin in another ventilation and noise elimination apparatus according to an embodiment of the present invention, when the first scatterer and the second scatterer are fins;
FIG. 6 is a schematic structural view of the ventilation and noise elimination device in FIG. 1 arranged at the air outlet of the fan;
fig. 7 is a schematic diagram of a ventilation muffler device for eliminating low frequency noise at a desired predetermined elimination frequency according to an embodiment of the present invention.
Description of the reference numerals
The method comprises the following steps of 1-a gas flow channel, 2-a silencing shell, 3-a first straight flow channel side wall, 4-a second straight flow channel side wall, 5-a first scatterer, 6-a second scatterer, 7-a cylinder, 8-a wing, 9-a ventilation silencing device and 10-a fan.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.
Referring to fig. 1 to 4, the present invention provides a ventilation and noise elimination device 9, which includes a noise elimination housing 2 having a gas flow passage 1, a flow passage side wall of the gas flow passage 1 includes a first flow passage side wall 3 and a second flow passage side wall 4 oppositely arranged in a first direction, wherein a plurality of first scatterers 5 extending toward the inside of the gas flow passage 1 and arranged in a plurality of rows and columns at intervals are provided on an inner surface of the first flow passage side wall 3 to form a first array structure, a plurality of second scatterers 6 extending toward the inside of the gas flow passage 1 and arranged in a plurality of rows and columns at intervals are provided on an inner surface of the second flow passage side wall 4 to form a second array structure, and a predetermined distance is maintained between the first scatterers 5 and the second scatterers 6 in the first direction, that is, a predetermined distance is maintained between the first array structure and the second array in the first direction.
Since the flow channel side wall of the gas flow channel 1 includes the first flow channel side wall 3 and the second flow channel side wall 4 which are oppositely arranged in the first direction, the inner surface of the first flow channel side wall 3 is provided with a plurality of first scatterers 5 which protrude toward the inside of the gas flow channel and are arranged at intervals in rows and columns to form a first array structure, the inner surface of the second flow channel side wall 4 is provided with a plurality of second scatterers 6 which protrude toward the inside of the gas flow channel and are arranged at intervals in rows and columns to form a second array structure, and a predetermined distance is kept between the first scatterers 5 and the second scatterers 6 in the first direction. Thus, the airflow can flow through the gas channel 1, and meanwhile, when the sound wave passes through the first array structure and the second array structure in the gas channel, the specific frequency in a certain range of the sound wave, such as 400Hz to 520Hz shown in fig. 7, can be attenuated due to oscillation in the array structure based on the wave length of the sound wave in the frequency range, so that the effect of reducing the intensity of the frequency range is achieved.
In addition, in the ventilation silencer device, the first and second flow path side walls may have various extended shapes, for example, the first and second flow path side walls may be arc-shaped flow path side walls, or may be straight flow path side walls. In addition, one ends of the first and second flow channel side walls may be disposed apart from each other and the other ends may be disposed close to each other, and the above gas flow channel 1 is formed as a tapered flow channel or a divergent flow channel along the gas flow direction.
For example, in an embodiment, referring to fig. 1, the first flow channel side wall is a first flat flow channel side wall 3, the second flow channel side wall is a second flat flow channel side wall 4, and the first flat flow channel side wall 3 and the second flat flow channel side wall 4 are arranged in parallel, so that the gas can smoothly flow along the first flat flow channel side wall 3 and the second flat flow channel side wall 4 to smoothly pass through the first array structure and the second array structure, thereby further reducing the gas noise.
The first diffuser 5 and the second diffuser 6 can be inserted, laser welded or screwed or integrally formed on the respective channel side walls, for example, flat channel side walls.
In addition, in the ventilation and noise elimination device, in one embodiment, the first scatterers 5 of rows and columns in the first array structure may be arranged to be offset from the second scatterers 6 of rows and columns in the second array structure in the first direction. Alternatively, in another embodiment, referring to fig. 3, each first scatterer 5 and each corresponding second scatterer 6 are aligned in the first direction, so as to further enhance the effect of eliminating the low-frequency noise in the predetermined elimination frequency band.
In addition, the number of rows and columns in the first array structure can be selected according to actual requirements, and the number of rows and columns in the second array structure can be selected according to actual requirements, for example, the muffling housing 2 can be formed into a strip-shaped housing, that is, the length of the muffling housing 2 in the extending direction of the gas flow channel 1 is greater than the width of the cross section of the muffling housing 2, so that the gas flow channel 1 is formed into a strip-shaped flow channel; the number of the cross section directions of the gas flow channels 1 is determined as column number, the number of the gas flow channels 1 arranged at intervals in the extension direction is determined as row number, and in the strip-shaped flow channel, the column number is smaller than the row number, so that the passing stiffness of sound waves can be prolonged, and the silencing effect is improved. For example, the number of columns may be 4-10 columns, further 5 columns, and the number of rows 15-20 rows, further 18 rows. For example, in the embodiment shown in fig. 1 and 4, the number of columns is 5 and the number of rows is 18 in the first array structure and the second array structure.
In addition, in the ventilation and noise elimination device, the first scattering body 5 and the second scattering body 6 may be solid bodies, for example, solid lead bodies, so that the solid bodies can be supported by selecting materials with required density in energy band calculation according to the distribution of the sound wave energy bands.
Furthermore, the first diffuser 5 and the second diffuser 6 may be hollow bodies, i.e. cavities are formed in the diffusers, which cavities may have various shapes, preferably conforming to the outer contour of the diffuser, e.g. when the diffusers are cylindrical, the cavities in the cylinder may be cylindrical.
In addition, the first scattering body 5 and the second scattering body 6 may have various profile shapes, which may be selected according to actual needs. For example, in one embodiment the first scattering body 5 and the second scattering body 6 may be spheres, or in another embodiment, as shown with reference to fig. 1, 2 and 4, the first scattering body 5 and the second scattering body 6 are cylinders. Thus, the outer circumference of the cylinder can facilitate the air flow and effectively eliminate the low-frequency noise of the preset elimination frequency band. In addition, the diameter of each scattering body, e.g. a cylinder, may be selected according to practical requirements, e.g. the diameter of each scattering body may be 3-8mm, further 4 mm.
In addition, in other embodiments, the first scattering body 5 and the second scattering body 6 are fins, and the respective fins are oriented in the same direction and arranged perpendicular to the direction of the gas flow in the gas flow path 1. Therefore, airflow guide intervals can be formed among the fins, airflow can easily pass through the gas flow channel, and meanwhile, the surfaces of the fins can effectively eliminate low-frequency noise of a preset elimination frequency band.
In addition, the fin may be a flat plate body as a whole, or a wavy plate body, or, in other embodiments, referring to fig. 5, the fin includes a cylindrical body 7 and fins 8 projecting oppositely on the outer surface of the cylindrical body 7, respectively. Thus, the fin with the structure can be jointed with the cylinder and the plate body, so that the gas can easily pass through the gas flow passage 1, and meanwhile, the low-frequency noise of the preset elimination frequency band can be effectively eliminated.
In addition, at least one of the first and second flow channel side walls, for example, the first and second flat flow channel side walls 3 and 4, may be an elastic side wall, for example, the first and second flat flow channel side walls 3 and 4 may be an elastic side wall, for example, a silicon rubber side wall, which has elasticity and hardness to provide an effect of eliminating acoustic wave type elastic waves while supporting and mounting the respective scattering bodies.
The outer surfaces of the first scattering body 5 and the second scattering body 6 are elastic outer surfaces, and for example, an elastic sleeve is fitted over the outer surface of each scattering body. In this way, the elastic outer surface may also have a canceling effect on acoustic type elastic waves.
In addition, in the first direction, the thickness of the first flow channel side wall and the second flow channel side wall, such as the straight flow channel side wall, and the height of the scattering body may be selected according to actual requirements, for example, in one embodiment, the thickness of the straight flow channel side wall may be 2-5mm, further 2mm, and the height of the scattering body may be 10-15mm, further 10 mm.
In addition, the first and second flow channel sidewalls, for example, the flow channel sidewalls between the first and second straight flow channel sidewalls 3 and 4 (for example, the left and right vertical flow channel sidewalls in the graphical interface of fig. 3) may be straight sidewalls, or may be arc sidewalls. For example, in one embodiment, the first and second flow channel side walls, such as the flow channel side wall between the first and second straight flow channel side walls 3 and 4, are straight side walls, so that the cross section of the sound-deadening housing 2 is rectangular or square, which allows easier airflow and better sound-deadening effect.
In addition, in an alternative embodiment of the ventilation and noise elimination device, the preset distance can be adjusted, so that the preset distance can be correspondingly adjusted according to the low-frequency noise of a specific preset elimination frequency band, the range of the noise which can be eliminated by the ventilation and noise elimination device is enlarged, and the ventilation and noise elimination device can be suitable for reducing and eliminating the noise in different occasions.
Of course, the adjustment of the predetermined distance may be achieved by various implementation structures, for example, one implementation structure in which at least one of the first diffuser 5 and the second diffuser 6 includes a pipe section capable of being telescopically sleeved, which makes each pipe section as a hollow body, each pipe section being telescopic to adjust the predetermined distance, thereby enabling noise to be more effectively eliminated.
In another embodiment, two flow channel side walls of the gas flow channel 1, which are connected between the first flow channel side wall and the second flow channel side wall, for example, the first straight flow channel side wall 3 and the second straight flow channel side wall 4, respectively include side wall sections capable of being telescopically sleeved, and each side wall section is telescopic to adjust a predetermined distance, so that the range of noise which can be eliminated by the ventilation and noise elimination device is expanded, and the ventilation and noise elimination device can be suitable for noise reduction and elimination in different occasions.
In other embodiments, at least one of the first diffuser 5 and the second diffuser 6 comprises telescopically encasing pipe sections, which results in each pipe section as a hollow body, which is telescoped to adjust the predetermined distance, and the two channel side walls of the gas channel 1, which are connected between the first channel side wall and the second channel side wall, for example the first flat channel side wall 3 and the second flat channel side wall 4, respectively comprise telescopically encasing side wall sections, which are telescoped to adjust the predetermined distance.
Finally, the present invention provides a ventilation treatment device, which comprises the ventilation silencer device 9 described above with reference to fig. 6, wherein the gas flow channel 1 is a channel section of a gas delivery channel of the ventilation treatment device. For example, in fig. 6, the ventilation silencer is provided at the air outlet of the fan 10. Of course, the ventilation and noise elimination device may also be disposed at the air inlet of the blower 10, or at the air inlet of the noise reduction box of the ventilation therapy equipment.
The ventilation therapy device may be a ventilator.
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 details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection 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 invention. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations.
In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.
Claims (13)
1. A ventilation silencer device, comprising a silencer housing (2) having a gas flow duct (1), the flow duct side walls of the gas flow duct (1) including a first flow duct side wall and a second flow duct side wall which are arranged at an interval in a first direction, wherein,
the inner surface of the first flow channel side wall is provided with a plurality of first scatterers (5) which extend towards the inside of the gas flow channel (1) and are arranged in a plurality of rows and columns at intervals, the inner surface of the second flow channel side wall is provided with a plurality of second scatterers (6) which extend towards the inside of the gas flow channel (1) and are arranged in a plurality of rows and columns at intervals, and a preset distance is kept between the first scatterers (5) and the second scatterers (6) in the first direction.
2. The ventilation silencer according to claim 1, wherein the first flow path side wall is a first straight flow path side wall (3), the second flow path side wall is a second straight flow path side wall (4), and the first straight flow path side wall (3) and the second straight flow path side wall (4) are arranged in parallel.
3. The ventilation silencer device according to claim 1, characterized in that each of the first diffusers (5) and the corresponding each of the second diffusers (6) are arranged in alignment in the first direction.
4. The ventilation muffler device according to claim 1, characterized in that the length of the muffler housing (2) in the extending direction of the gas flow passage (1) is larger than the width of the cross section of the muffler housing (2) so that the gas flow passage (1) is formed as an elongated flow passage;
the number of the cross section directions of the gas flow channels (1) is defined as column number, the number of the gas flow channels (1) which are arranged at intervals in the extension direction is defined as row number, and the column number is smaller than the row number in the strip-shaped flow channel.
5. The ventilation silencer device according to claim 1, characterized in that said first diffuser (5) and said second diffuser (6) are solid; alternatively, the first scattering body (5) and the second scattering body (6) are hollow bodies.
6. The ventilation silencer device according to claim 1, characterized in that said first diffuser (5) and said second diffuser (6) are cylindrical.
7. The ventilation silencer according to claim 1, characterized in that the first diffuser (5) and the second diffuser (6) are fins, each of which is oriented in the same direction and is arranged perpendicular to the direction of the gas flow in the gas channel (1).
8. The ventilation muffler device according to claim 7, characterized in that the fins comprise a cylindrical body (7) and wings (8) projecting oppositely on the outer surface of the cylindrical body (7), respectively.
9. The vent muffler apparatus according to claim 1, wherein the first flow channel side wall and the second flow channel side wall are elastic side walls;
and/or the presence of a gas in the gas,
the outer surfaces of the first scatterer (5) and the second scatterer (6) are elastic outer surfaces.
10. The ventilation muffler device according to any one of claims 1 to 9, wherein the muffler shell (2) has a rectangular or square cross section.
11. The ventilation muffler device of claim 10, wherein the predetermined distance is adjustable.
12. The ventilation silencer device according to claim 11, characterized in that at least one of the first diffuser (5) and the second diffuser (6) comprises telescopically nested pipe sections, each of which is telescopic to adjust the predetermined distance;
and/or the presence of a gas in the gas,
the two runner side walls of the gas runner (1) connected between the first runner side wall and the second runner side wall respectively comprise side wall sections which can be sleeved in a telescopic mode, and each side wall section is telescopic to adjust the preset distance.
13. A ventilation therapy device, characterized in that it comprises a ventilation silencer device (9) according to any one of claims 1 to 12, wherein the gas channel (1) serves as a channel section of a gas delivery channel of the ventilation therapy device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023121346.7U CN215024279U (en) | 2020-12-22 | 2020-12-22 | Ventilation noise eliminator and ventilation treatment equipment |
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| CN202023121346.7U CN215024279U (en) | 2020-12-22 | 2020-12-22 | Ventilation noise eliminator and ventilation treatment equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022135146A1 (en) * | 2020-12-22 | 2022-06-30 | 北京怡和嘉业医疗科技股份有限公司 | Ventilation sound-diminishing apparatus and ventilation therapy device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022135146A1 (en) * | 2020-12-22 | 2022-06-30 | 北京怡和嘉业医疗科技股份有限公司 | Ventilation sound-diminishing apparatus and ventilation therapy device |
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