CN115247662A - Noise reduction device and breathing machine - Google Patents
Noise reduction device and breathing machine Download PDFInfo
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- CN115247662A CN115247662A CN202210916019.5A CN202210916019A CN115247662A CN 115247662 A CN115247662 A CN 115247662A CN 202210916019 A CN202210916019 A CN 202210916019A CN 115247662 A CN115247662 A CN 115247662A
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- air
- air outlet
- air inlet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0057—Pumps therefor
- A61M16/0066—Blowers or centrifugal pumps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/42—Reducing noise
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
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- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Emergency Medicine (AREA)
- Pulmonology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The embodiment of the invention provides a noise reduction device and a breathing machine, and relates to the field of medical equipment. This device of making an uproar can install in the air current import department of the turbofan of breathing machine, venthole and turbofan's air inlet intercommunication, the device of making an uproar includes the plate body, a plurality of annular arch and bottom, be equipped with venthole and a plurality of inlet port on the plate body, a plurality of annular arch set up respectively in a plurality of inlet ports, and the annular arch encircles the inlet port, the air inlet channel is injectd to the bellied inner wall of annular, the bottom is installed in the plate body, in order to inject the air outlet cavity jointly, a plurality of annular arch are located the air outlet cavity, the inlet port, the air inlet channel, air outlet cavity and venthole communicate in proper order, it has reduced the noise size of wearing out the inlet port, and then the whole noise of breathing machine has been reduced, the noise reduction effect to the breathing machine has been improved.
Description
Technical Field
The invention relates to the field of medical equipment, in particular to a noise reduction device and a breathing machine.
Background
The breathing machine is used as a medical device capable of replacing or assisting a patient to complete mechanical ventilation, can improve the breathing function, reduce the breathing function consumption and save the heart reserve capacity, and is mainly used in families, sleep treatment centers and some clinic hospitals.
Because the turbofan of breathing machine can produce the running noise in the course of the work, can influence patient's use travelling comfort, therefore need fall the noise to the breathing machine, but the breathing machine noise reduction effect among the prior art is not good.
Disclosure of Invention
The invention provides a noise reduction device and a respirator, which can improve the noise reduction effect of the respirator.
Embodiments of the invention may be implemented as follows:
an embodiment of the present invention provides a noise reduction apparatus, including:
the air inlet plate comprises a plate body, wherein an air outlet and a plurality of air inlets are formed in the plate body;
the annular bulges are respectively arranged on the air inlet holes and surround the air inlet holes, and the inner walls of the annular bulges define air inlet flow channels; and
the bottom, the bottom install in the plate body to inject the air cavity jointly, a plurality of annular archs are located go out the air cavity indoor, the inlet port, the air inlet channel, go out the air cavity and the venthole communicates in proper order.
Optionally, the noise reduction device further comprises a top cover, the top cover is mounted on one side of the plate body away from the bottom cover, and the top cover and the plate body jointly define an air inlet chamber;
the top cap is provided with an air inlet and an air outlet, and the air inlet, the air inlet channel, the air outlet chamber, the air outlet and the air outlet are communicated in sequence.
Optionally, the air inlet sets up in the edge of top cap, the figure of air inlet is a plurality of, and is a plurality of the air inlet interval sets up.
Optionally, a flexible protrusion is arranged on one side of the top cover, which is far away from the plate body, and the flexible protrusion is used for abutting against the installation shell;
the number of the flexible bulges is multiple, and the flexible bulges are distributed around the central line of the air outlet.
Optionally, the noise reduction device further comprises a mounting shell and a hollow joint, the mounting shell is provided with a channel hole, an inner wall of the hollow joint defines an air inlet channel, the hollow joint penetrates through the air inlet, an outer wall of the hollow joint is in sealing abutting joint with the inner wall of the air inlet, and the channel hole, the air inlet channel and the air outlet hole are communicated;
the installation casing with flexible protruding elasticity butt, the installation casing is used for connecting turbofan, be equipped with the cooperation cylinder on the installation casing, be equipped with hollow post on the bottom, the plate body is equipped with first cooperation opening, the top cap is equipped with second cooperation opening, first cooperation opening with second cooperation opening joint in proper order is in the outer wall of hollow post, the cooperation cylinder runs through hollow post.
Optionally, an air inlet partition plate is arranged at the edge of the first matching opening, and the air inlet partition plate is abutted to one side, away from the mounting shell, of the top cover.
Optionally, the noise reduction device further comprises a plurality of air outlet clapboards, the air outlet clapboards are connected to the side walls of the board body, the air outlet clapboards are arranged at intervals to separate the air outlet cavity into a plurality of air outlet flow passages, and the annular bulges are distributed in the air outlet flow passages.
Optionally, the air outlet baffles are arranged around the center line of the air outlet hole, and the annular protrusions are uniformly distributed in the air outlet flow passages.
Optionally, the height of at least one of the annular projections is greater than the height of another portion of the annular projections.
The embodiment of the invention also provides a breathing machine which comprises a turbofan and the noise reduction device, wherein the noise reduction device is arranged at the airflow inlet of the turbofan, and the air outlet is communicated with the airflow inlet of the turbofan.
The noise reduction device and the breathing machine provided by the embodiment of the invention have the beneficial effects of, for example:
the embodiment of the invention provides a noise reduction device which can be arranged at an airflow inlet of a turbofan of a breathing machine, an air outlet is communicated with an air inlet of the turbofan, the noise reduction device comprises a plate body, a plurality of annular bulges and a bottom cover, the plate body is provided with the air outlet and the plurality of air inlets, the plurality of annular bulges are respectively arranged on the plurality of air inlets, the annular bulges surround the air inlets, the inner walls of the annular bulges define air inlet channels, the bottom cover is arranged on the plate body to jointly define an air outlet cavity, the plurality of annular bulges are positioned in the air outlet cavity, the air inlets, the air inlet channels, the air outlet cavity and the air outlets are sequentially communicated, noise is transmitted from the air inlet of the turbofan, the noise enters the air outlet cavity from the air outlet and then enters the air inlet channels of the plurality of annular bulges, the inner walls of the annular bulges can repeatedly reflect and absorb the noise, the size of the noise penetrating through the air inlets is reduced, the overall noise of the breathing machine is further reduced, and the noise reduction effect of the breathing machine is improved.
The embodiment of the invention also provides a breathing machine, which comprises the turbofan and the noise reduction device, wherein the noise reduction device is arranged at the airflow inlet of the turbofan, and the air outlet hole is communicated with the airflow inlet of the turbofan, so that the overall noise of the breathing machine can be reduced, and the noise reduction effect on the breathing machine is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic view of a turbofan provided in an embodiment of the invention;
FIG. 2 is a schematic view of a noise reducer provided in an embodiment of the present invention;
FIG. 3 is an exploded view of a noise reducing device provided in an embodiment of the present invention;
FIG. 4 is a schematic view of an outlet baffle provided in an embodiment of the present invention;
FIG. 5 is a schematic view of an intake baffle provided in an embodiment of the present invention;
fig. 6 is a partial cross-sectional view of a noise reducer provided in an embodiment of the present invention.
Icon: 1000-a noise reducing device; 100-a plate body; 101-air outlet holes; 102-an air intake; 103-a first mating opening; 200-an annular projection; 201-an air inlet flow channel; 300-a bottom cover; 301-an outlet chamber; 302-hollow column; 400-a top cover; 401-an air inlet chamber; 402-an air inlet; 403-gas outlet; 404-a second mating opening; 500-flexible protrusions; 600-mounting the housing; 601-passage holes; 610-mating posts; 700-hollow joint; 701-an air inlet channel; 800-air outlet partition board; 801-air outlet flow channel; 900-an intake baffle; 901-air inlet channel; 2000-turbo fan; 2001-gas flow inlet; 3000-blower housing.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
The breathing machine is a medical device capable of replacing or assisting patients to complete mechanical ventilation, can improve the breathing function, reduce the breathing function consumption and save the heart reserve capacity, and is mainly used for families, sleep treatment centers and some clinic hospitals.
Because the turbofan of breathing machine can produce the running noise in the course of the work, can influence patient's use travelling comfort, therefore it makes an uproar to fall to the breathing machine to need, generally speaking, the noise of the turbofan of breathing machine spreads the back, mainly conduct the external world again via the fan casing, for example fall the most important measure of making an uproar to the turbofan and hold in the palm the realization and fall the shock attenuation to the turbofan with soft silica gel, absorb the vibration that the fan produced when high-speed operation with soft silica gel pad, avoided the vibration conduction of turbofan to cause resonance to the fan casing, it realizes falling the noise to assist in the air flue to inhale the sound cotton realization simultaneously, but the effect of making an uproar still is not good among the prior art.
In view of the above, referring to fig. 1-6, the noise reduction apparatus 1000 and the ventilator provided in the embodiment of the present invention can solve this problem, which will be described in detail below.
Referring to fig. 1, an embodiment of the present invention provides a ventilator, which includes a turbo fan 2000, a fan housing 3000, and a noise reduction device 1000, wherein an arrow in fig. 1 is a path of air entering the turbo fan 2000, a propagation direction of noise is opposite to a direction of the path of air entering the turbo fan 2000, the noise reduction device 1000 is installed at an airflow inlet 2001 of the turbo fan 2000, which can reduce overall noise of the ventilator, the noise reduction device 1000 and the turbo fan 2000 are both installed in the fan housing 3000, and the noise reduction device 1000 can improve a noise reduction effect of the ventilator.
It is easy to understand that the breathing machine further includes a gas source, a gas supply device, a mixed air device, and the like, and the principle of the specific breathing machine can refer to the breathing machine in the prior art, which is not described herein in detail.
Referring to fig. 2 to 6, for convenience of description, the mounting housing 600 is hidden in fig. 2, 3 and 6, so as to further describe the noise reduction device 1000 in detail, the noise reduction device 1000 includes a plate body 100, a plurality of annular protrusions 200 and a bottom cover 300, the plate body 100 is provided with an air outlet 101 and a plurality of air inlet holes 102, the air outlet 101 is communicated with an air flow inlet 2001 of the turbo fan 2000, the plurality of annular protrusions 200 are respectively disposed on the plurality of air inlet holes 102, the annular protrusions 200 surround the air inlet holes 102, inner walls of the annular protrusions 200 define an air inlet flow channel 201, in this embodiment, the number of the annular protrusions 200 is thirty, the annular protrusions 200 are configured as hollow cylinders, and an axial center line of the annular protrusions 200 is perpendicular to the plate body 100.
The bottom cover 300 is mounted on the plate body 100, the bottom cover 300 and the plate body 100 jointly define an air outlet chamber 301, all the annular protrusions 200 are located in the air outlet chamber 301, the air inlet holes 102, the air inlet flow channels 201, the air outlet chamber 301 and the air outlet holes 101 are sequentially communicated, air enters from the air inlet holes 102, and finally flows out from the air outlet holes 101 to enter the interior of the turbofan 2000.
The noise spreads from turbofan 2000's air inlet 402, and the noise gets into air-out cavity 301 from venthole 101, then gets into in the inlet flow 201 of a plurality of annular protrusion 200, and the inner wall of annular protrusion 200 can reflect and absorb the noise repeatedly, has reduced the noise size of wearing out inlet port 102, and then has reduced the whole noise of breathing machine, has improved the noise reduction of breathing machine.
It is easy to understand that the noise in the present application is noise existing in the form of sound waves, and the main sources of the noise transmitted from the airflow inlet 2001 of the turbo fan 2000 are noise generated by turbulence of airflow of turbine blades in the turbo fan 2000 and internal mechanical noise of the turbo fan 2000, so that the noise reduction effect on the turbo fan 2000 is enhanced, the noise reduction effect of the ventilator is improved, and the comfort of a patient is improved.
In order to facilitate air intake, the noise reduction device 1000 further comprises a top cover 400, the top cover 400 is mounted on one side, away from the bottom cover 300, of the plate body 100, the top cover 400 and the plate body 100 jointly define an air intake chamber 401, the top cover 400 is provided with an air inlet 402 and an air outlet 403, the air inlet 402, the air inlet holes 102, the air intake channel 201, the air outlet chamber 301, the air outlet 101 and the air outlet 403 are sequentially communicated, the air inlet 402 is arranged on the edge of the top cover 400, the number of the air inlets 402 is multiple, the air inlets 402 are arranged at intervals, specifically, the number of the air inlets 402 is three, the air inlets 402 are arc-shaped openings, and air enters the air intake chamber 401 from the three air inlets 402 and then enters the air inlet holes 102.
It should be noted that, in order to facilitate the installation and connection among the top cover 400, the plate body 100, and the bottom cover 300, the bottom cover 300 is provided with the hollow column 302, the plate body 100 is provided with the first matching opening 103, the top cover 400 is provided with the second matching opening 404, the first matching opening 103 and the second matching opening 404 are sequentially connected to the outer wall of the hollow column 302 in a clamping manner, specifically, the first matching opening 103 and the second matching opening 404 are both arc-shaped openings, and the inner wall of the first matching opening 103 and the inner wall of the second matching opening 404 are both tightly attached to the outer wall of the hollow column 302.
In order to mount the top cover 400 on the airflow inlet 2001 of the turbo fan 2000 and ensure that the air passes through the annular protrusion 200 completely, and improve the sealing performance, the noise reduction device 1000 further includes a mounting housing 600 and a hollow joint 700, wherein the hollow joint 700 is a soft joint made of silicone, and the structure of the hollow joint 700 is similar to the shape of a corrugated pipe.
The mounting housing 600 is provided with a channel hole 601, the inner wall of the hollow joint 700 defines an air inlet channel 701, the hollow joint 700 penetrates through the air inlet 402 of the top cover 400, the outer wall of the hollow joint 700 is in sealing abutment with the inner wall of the air inlet 402, the channel hole 601, the air inlet channel 701 and the air outlet hole 101 are communicated, specifically, in the embodiment, one end of the hollow joint 700 is in sealing abutment with the air flow inlet 2001 of the turbo fan 2000, and the other end of the hollow joint 700 is in sealing connection with the air outlet hole 101.
Wherein, installation casing 600 fixed connection is on turbofan 2000, and is equipped with cooperation cylinder 610 on the installation casing 600, and cooperation cylinder 610 runs through hollow post 302, and is connected with hollow post 302, and specifically, the figure of cooperation cylinder 610 is three, and three cooperation cylinder 610 runs through three hollow post 302 respectively.
In order to avoid the influence of the vibration of the turbo fan 2000 on the noise reduction device 1000, one side of the top cover 400, which is far away from the plate body 100, is provided with a plurality of flexible protrusions 500, the plurality of flexible protrusions 500 are distributed around the center line of the air outlet 403, and the mounting shell 600 is elastically abutted to the flexible protrusions 500, so that the contact area between the top cover 400 and the mounting shell 600 can be reduced, and meanwhile, the flexible protrusions 500 can also reduce the vibration of the top cover 400, and further reduce the noise.
In order to reduce noise for multiple times and reduce noise as much as possible, the noise reduction device 1000 further includes a plurality of air outlet partition plates 800, specifically nine air outlet partition plates 800, the nine air outlet partition plates 800 are connected to the side walls of the plate body 100, the plate body 100 is similar to a disk structure, the air outlet partition plates 800 extend along the radial direction of the plate body 100, the nine air outlet partition plates 800 surround the center line of the air outlet hole 101, and the nine air outlet partition plates 800 may be disposed at intervals to divide the air outlet chamber 301 into eight air outlet flow passages 801.
In this embodiment, the end portions of two adjacent outlet partition plates 800 close to the two sides of the first matching opening 103 are connected, so that the nine outlet partition plates 800 divide the gas chamber into six outlet flow channels 801, and the inlet flow channels 201, the outlet flow channels 801 and the outlet holes 101 are sequentially communicated.
When passing through the six outlet flow channels 801, the noise coming out of the outlet holes 101 is firstly reflected and absorbed between the adjacent outlet partition plates 800, and finally the noise is attenuated, and then the noise enters the inner wall of the annular protrusion 200, and is repeatedly reflected and absorbed again, so that the noise is reduced.
It should be noted that thirty annular protrusions 200 are uniformly distributed in six outlet flow channels 801, and five annular protrusions 200 are distributed in each outlet flow channel 801, but of course, in other embodiments, the number of the annular protrusions 200 in adjacent outlet flow channels 801 may also be different, for example, four annular protrusions 200 are provided in one outlet flow channel 801, six annular protrusions 200 are provided in another outlet flow channel 801, and the number is not limited herein.
Because the noise generated by the turbo fan is broadband noise, in order to absorb the noise with different frequencies, in the plurality of annular protrusions 200 located in the air outlet flow channel 801, the height of at least one annular protrusion 200 may be greater than the height of another part of annular protrusions 200, specifically, in five annular protrusions 200, the height of one annular protrusion 200 is greater than the heights of the other four annular protrusions 200, the heights of the other four annular protrusions 200 may be equal, the heights of the four annular protrusions 200 may be different, or the heights of the five annular protrusions 200 may be different, so as to absorb the noise with different frequencies.
Further, the edge of the first fitting opening 103 is provided with a plurality of intake partitions 900, specifically six intake partitions 900. The six air inlet partition plates 900 are abutted to one side, far away from the installation shell 600, of the top cover 400, the six air inlet partition plates 900 are respectively and uniformly distributed on two sides of the first matching opening 103, wherein the adjacent air inlet partition plates 900 distributed on two sides of the air inlet hole 102 limit an air inlet channel 901, and the air inlet 402, the air inlet channel 901 and the air inlet hole 102 are sequentially communicated.
It is easy to understand that, the noise coming out from the turbo fan 2000 will be reflected and absorbed between the adjacent air outlet partition boards 800 at first, and the noise is attenuated, then the noise enters the inner wall of the annular protrusion 200 again, and the noise is reflected and absorbed again, and the noise is reduced, and finally the noise is reflected and absorbed between the adjacent air inlet partition boards 900, and after the noise is attenuated, the noise comes out from the three air inlets 402 again and goes out the silencer, and the noise is reduced for many times, and the whole noise of the breathing machine is greatly reduced.
In summary, the noise reduction device 1000 may be installed at an airflow inlet 2001 of a turbofan 2000 of a ventilator, the air outlet 101 is communicated with an air inlet 402 of the turbofan 2000, the noise reduction device 1000 includes a plate body 100, a plurality of annular protrusions 200 and a bottom cover 300, the plate body 100 is provided with the air outlet 101 and the plurality of air inlet 102, the plurality of annular protrusions 200 are respectively disposed on the plurality of air inlet 102, the annular protrusions 200 surround the air inlet 102, an inner wall of the annular protrusions 200 defines an air inlet channel 201, the bottom cover 300 is installed on the plate body 100 to collectively define an air outlet chamber 301, the plurality of annular protrusions 200 are located in the air outlet chamber 301, the air inlet 102, the air inlet channel 201, the air outlet chamber 301 and the air outlet 101 are sequentially communicated, noise is emitted from the air inlet 402 of the turbofan 2000, the noise enters the air outlet chamber 301 from the air outlet 101 and then enters the air inlet channels 201 of the plurality of annular protrusions 200, the inner wall of the annular protrusions 200 may repeatedly reflect and absorb the noise, the noise passing through the air inlet 102 is reduced, thereby reducing the overall noise of the ventilator, and improving the noise reduction effect of the ventilator.
The respirator comprises a turbofan 2000 and the noise reduction device 1000, wherein the noise reduction device 1000 is installed at an airflow inlet 2001 of the turbofan 2000, and the air outlet 101 is communicated with the airflow inlet 2001 of the turbofan 2000, so that the overall noise of the respirator can be reduced, and the noise reduction effect on the respirator is improved.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A noise reducing device, comprising:
the air-conditioning plate comprises a plate body (100), wherein an air outlet hole (101) and a plurality of air inlet holes (102) are formed in the plate body (100);
a plurality of annular protrusions (200), wherein the annular protrusions (200) are respectively arranged on the plurality of air inlet holes (102), the annular protrusions (200) surround the air inlet holes (102), and the inner walls of the annular protrusions (200) define an air inlet flow channel (201); and
the bottom cover (300) is mounted on the plate body (100) to jointly define an air outlet chamber (301), the annular protrusions (200) are located in the air outlet chamber (301), and the air inlet holes (102), the air inlet flow channels (201), the air outlet chamber (301) and the air outlet holes (101) are communicated in sequence.
2. The noise reduction device according to claim 1, further comprising a top cover (400), the top cover (400) being mounted to a side of the plate body (100) remote from the bottom cover (300), the top cover (400) and the plate body (100) together defining an air intake chamber (401);
the top cover (400) is provided with an air inlet (402) and an air outlet (403), and the air inlet (402), the air inlet hole (102), the air inlet flow channel (201), the air outlet chamber (301), the air outlet hole (101) and the air outlet (403) are communicated in sequence.
3. The noise reduction device according to claim 2, wherein the air inlets (402) are provided at an edge of the top cover (400), the number of the air inlets (402) is plural, and the plural air inlets (402) are provided at intervals.
4. The noise reduction device according to claim 3, characterized in that the side of the top cover (400) remote from the plate body (100) is provided with a flexible projection (500), the flexible projection (500) being intended to abut against a mounting housing (600);
the number of the flexible protrusions (500) is multiple, and the flexible protrusions (500) are distributed around the center line of the air outlet (403).
5. The noise reduction device according to claim 4, further comprising a mounting housing (600) and a hollow joint (700), wherein the mounting housing (600) is provided with a passage hole (601), an inner wall of the hollow joint (700) defines an air inlet passage (701), the hollow joint (700) penetrates through the air inlet (402), an outer wall of the hollow joint (700) is in sealing abutment with the inner wall of the air inlet (402), and the passage hole (601), the air inlet passage (701) and the air outlet hole (101) are communicated;
installation casing (600) with flexible arch (500) elasticity butt, installation casing (600) are used for connecting turbofan (2000), be equipped with cooperation cylinder (610) on installation casing (600), be equipped with hollow post (302) on bottom (300), plate body (100) are equipped with first cooperation opening (103), top cap (400) are equipped with second cooperation opening (404), first cooperation opening (103) with second cooperation opening (404) joint in proper order is in the outer wall of hollow post (302), cooperation cylinder (610) run through hollow post (302).
6. The noise reducer according to claim 5, wherein an edge of the first fitting opening (103) is provided with an air inlet baffle (900), and the air inlet baffle (900) abuts against a side of the top cover (400) away from the mounting housing (600).
7. The noise reduction device according to claim 1, further comprising a plurality of air outlet baffles (800), wherein the air outlet baffles (800) are connected to the side wall of the plate body (100), the air outlet baffles (800) are arranged at intervals to divide the air outlet chamber (301) into a plurality of air outlet flow channels (801), and the annular protrusions (200) are distributed in the air outlet flow channels (801).
8. The noise reducer according to claim 7, wherein the plurality of outlet baffles (800) are disposed around a center line of the outlet hole (101), and the plurality of annular protrusions (200) are uniformly distributed in the plurality of outlet flow channels (801).
9. The noise reduction device according to claim 1, characterized in that the height of at least one annular projection (200) is greater than the height of another portion of the annular projection (200).
10. A ventilator comprising a turbo fan (2000) and a noise reducing device according to any of claims 1 to 9, said noise reducing device being mounted to an airflow inlet (2001) of said turbo fan (2000), said outlet aperture (101) being in communication with the airflow inlet (2001) of said turbo fan (2000).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210916019.5A CN115247662A (en) | 2022-08-01 | 2022-08-01 | Noise reduction device and breathing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210916019.5A CN115247662A (en) | 2022-08-01 | 2022-08-01 | Noise reduction device and breathing machine |
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| Publication Number | Publication Date |
|---|---|
| CN115247662A true CN115247662A (en) | 2022-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210916019.5A Pending CN115247662A (en) | 2022-08-01 | 2022-08-01 | Noise reduction device and breathing machine |
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| CN (1) | CN115247662A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115591069A (en) * | 2022-10-31 | 2023-01-13 | 江苏鱼跃医疗设备股份有限公司（Cn） | Air duct assembly of breathing machine and portable breathing machine |
| CN116764049A (en) * | 2023-06-01 | 2023-09-19 | 湖南比扬医疗科技有限公司 | High-flow breathing machine with adjustable grid air resistance |
-
2022
- 2022-08-01 CN CN202210916019.5A patent/CN115247662A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115591069A (en) * | 2022-10-31 | 2023-01-13 | 江苏鱼跃医疗设备股份有限公司（Cn） | Air duct assembly of breathing machine and portable breathing machine |
| CN116764049A (en) * | 2023-06-01 | 2023-09-19 | 湖南比扬医疗科技有限公司 | High-flow breathing machine with adjustable grid air resistance |
| CN116764049B (en) * | 2023-06-01 | 2024-01-09 | 湖南比扬医疗科技有限公司 | High-flow breathing machine with adjustable grid air resistance |
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