CN115192841A

CN115192841A - Silencer box of breathing machine

Info

Publication number: CN115192841A
Application number: CN202211009204.2A
Authority: CN
Inventors: 邓武雄; 陈超; 肖聪; 成婷
Original assignee: Hunan Beyond Medical Technology Co ltd
Current assignee: Hunan Beyond Medical Technology Co ltd
Priority date: 2022-08-22
Filing date: 2022-08-22
Publication date: 2022-10-18

Abstract

The invention relates to the technical field of breathing machines, in particular to a silencing box of a breathing machine. The breathing machine sound attenuation box comprises a main body, a fan, a sound attenuation structure, an air inlet joint and an air outlet joint; the main body is provided with an accommodating cavity and a mixed flow channel; the fan is accommodated in the accommodating cavity; the air inlet joint and the air outlet joint are both connected with the main body, the air inlet joint is communicated with the mixed flow channel, and the air inlet joint is used for introducing air and oxygen into the mixed flow channel; the mixed flow channel is communicated with an air inlet of the fan, and the exhaust joint is communicated with an exhaust port of the fan; the silencing structure is used for eliminating noise generated by the fan and comprises a porous plate accommodated in the accommodating cavity, and the porous plate is arranged around the peripheral outline of the fan and is spaced from the peripheral surface of the fan and the inner wall of the accommodating cavity; the fan is used for mixing and pressurizing air and oxygen introduced by the air inlet joint and then leading out the air and the oxygen by the air outlet joint. The breathing machine whistle box can reduce the noise that the fan produced when moving to reduce the noise and to user's interference, improve user experience.

Description

Silencer box of breathing machine

Technical Field

The invention relates to the technical field of breathing machines, in particular to a silencing box of a breathing machine.

Background

The whistle box is a core component of the high-flow respirator, and the main function of the whistle box is to pressurize and deliver gas to a patient through the high-speed rotation of an internal fan. At present, dynamic noise of a silencing box on the market is overlarge when a user uses the silencing box, and particularly, in a high-flow treatment mode, the generated noise frequencies are different due to the difference of oxygen concentration and the difference of rotating speed of a turbine fan, so that the effect of a common noise reduction scheme is not obvious, and the sleep of the user is influenced.

Disclosure of Invention

The invention aims to provide a silencer for a breathing machine, which can reduce noise generated when a fan operates, thereby reducing the interference of the noise to a user, improving the user experience and avoiding influencing the sleep of the user.

Embodiments of the invention may be implemented as follows:

the invention provides a breathing machine sound-muffling box which comprises a main body, a fan, a sound-muffling structure, an air inlet joint and an air outlet joint, wherein the fan is arranged on the main body;

the main body is provided with an accommodating cavity and a mixed flow channel; the fan is accommodated in the accommodating cavity; the air inlet joint and the air outlet joint are both connected with the main body, the air inlet joint is communicated with the mixed flow channel, and the air inlet joint is used for introducing air and oxygen into the mixed flow channel; the mixed flow channel is communicated with an air inlet of the fan, and the exhaust joint is communicated with an exhaust port of the fan;

the noise reduction structure is used for eliminating noise generated by the fan and comprises a porous plate accommodated in the accommodating cavity, wherein the porous plate is arranged around the peripheral outline of the fan and is spaced from the peripheral surface of the fan and the inner wall of the accommodating cavity;

the fan is used for mixing and pressurizing air and oxygen introduced by the air inlet joint and then leading out the air and the oxygen by the air exhaust joint.

In an alternative embodiment, the sound attenuating structure further comprises sound attenuating cotton; the amortization cotton holding is in the holding chamber to set up along the inner wall profile in holding chamber, and set up with the perforated plate interval.

In an alternative embodiment, the main body includes a housing, a first cover, and a second cover; the first cover body and the second cover body are respectively arranged at two ends of the shell in a covering mode, the first cover body and the shell jointly limit the containing cavity, and the second cover body and the shell jointly limit the mixed flow channel.

In an alternative embodiment, the main body further comprises a partition plate connected with the housing, and the partition plate is positioned between the first cover body and the second cover body;

the partition board and the first cover body jointly define an accommodating cavity, and a fan positioned in the accommodating cavity is connected with the first cover body and the partition board; one side that the baffle deviates from first lid is provided with the mixed flow groove, and mixed flow groove and second lid inject mixed flow passageway jointly.

In an optional embodiment, the partition plate is provided with an air guide hole, and the mixed flow channel is communicated with an air inlet of the fan through the air guide hole.

In an optional implementation mode, a first sealing element and a damping sponge are arranged at the joint of the fan and the first cover body, and a silica gel pad is arranged at the joint of the fan and the partition plate.

In an alternative embodiment, a second seal is provided between the junction of the second cover and the housing.

In an alternative embodiment, the air inlet joint comprises an air joint and an oxygen joint, and the air joint and the oxygen joint are connected with the shell or the second cover body; a filter element is arranged in the air joint.

In an alternative embodiment, the housing defines a mounting slot for mounting the exhaust fitting.

In an optional embodiment, one side of the partition board facing the first cover body is provided with a plurality of clamping parts, and the clamping parts are located between the outer periphery of the fan and the inner peripheral surface of the silencing cotton; and the clamping parts are all used for clamping the porous plate.

The embodiment of the invention has the beneficial effects that:

the silencer of the breathing machine comprises a main body, a fan, a silencing structure, an air inlet joint and an air outlet joint; the main body is provided with an accommodating cavity and a mixed flow channel; the fan is accommodated in the accommodating cavity; the air inlet joint and the air outlet joint are both connected with the main body, the air inlet joint is communicated with the mixed flow channel, and the air inlet joint is used for introducing air and oxygen into the mixed flow channel; the mixed flow channel is communicated with an air inlet of the fan, and the exhaust joint is communicated with an exhaust port of the fan; the noise reduction structure is used for eliminating noise generated by the fan and comprises a porous plate accommodated in the accommodating cavity, wherein the porous plate is arranged around the peripheral outline of the fan and is spaced from the peripheral surface of the fan and the inner wall of the accommodating cavity; the fan is used for mixing and pressurizing air and oxygen introduced by the air inlet joint and then leading out the air and the oxygen by the air exhaust joint. The silencer for the breathing machine can reduce noise generated during operation of the fan, so that interference of the noise to a user is reduced, user experience is improved, and influence on sleep of the user is avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed 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 perspective view of a first viewing angle of a silencer of a breathing machine in an embodiment of the invention;

FIG. 2 is a perspective view of a second perspective of a silencer cabinet of the ventilator in an embodiment of the present invention;

FIG. 3 is a perspective view of a sound attenuating structure and a body according to an embodiment of the present invention;

FIG. 4 is a top view of an embodiment of a sound attenuating structure and body of the present invention;

FIG. 5 is an exploded view of the silencer of the ventilator according to an embodiment of the present invention;

FIG. 6 is an exploded view of the fan, the noise reduction structure and the main body according to the embodiment of the present invention;

FIG. 7 is a schematic view of the arrangement of a mixing trough according to an embodiment of the present invention;

FIG. 8 is a schematic view of an arrangement of air vents in an embodiment of the present invention;

fig. 9 is a schematic view illustrating the arrangement of the engaging portion in the embodiment of the present invention.

An icon: 200-a breathing machine whistle box; 210-a body; 220-a fan; 230-a sound attenuating structure; 240-inlet connection; 250-a vent fitting; 211-a housing chamber; 212-mixed flow channel; 231-a perforated plate; 232-silencing cotton; 213-a housing; 214-a first cover; 215-a second cover; 216-a separator; 217-a mixing trough; 218-air vents; 261-a first seal; 262-silica gel pad; 263 — a second seal; 264-shock absorbing sponge; 241-air connection; 242-oxygen connection; 243-filter element; 219-mounting groove; 265-a snap-in part.

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 or explained in subsequent figures.

In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which the product of the present invention is used to usually place, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, 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.

Referring to fig. 1 to 6, the present embodiment provides a ventilator sound-muffling box 200, wherein the ventilator sound-muffling box 200 includes a main body 210, a fan 220, a sound-muffling structure 230, an air inlet connector 240 and an air outlet connector 250;

the main body 210 has a receiving cavity 211 and a mixed flow channel 212; the blower 220 is accommodated in the accommodating cavity 211; the air inlet connector 240 and the air outlet connector 250 are both connected with the main body 210, the air inlet connector 240 is communicated with the mixed flow channel 212, and the air inlet connector 240 is used for introducing air and oxygen into the mixed flow channel 212; the mixed flow channel 212 is communicated with the air inlet of the fan 220, and the exhaust joint 250 is communicated with the exhaust port of the fan 220;

the noise reduction structure 230 is used for reducing noise generated by the fan 220, and includes a porous plate 231 accommodated in the accommodating chamber 211, wherein the porous plate 231 is disposed around the outer peripheral profile of the fan 220 and spaced from the outer peripheral surface of the fan 220 and the inner wall of the accommodating chamber 211;

the blower 220 is used to mix and pressurize the air and oxygen introduced through the air inlet connector 240, and then to discharge the mixture through the air outlet connector 250.

Referring to fig. 1-6, the operating principle of the ventilator sound-muffling box 200 is:

the ventilator sound muffling box 200 is used in a respiratory humidification therapy apparatus, and functions to pressurize and deliver gas to a patient by the rotation of the internal blower 220. Specifically, the ventilator sound-muffling box 200 comprises a main body 210, a fan 220, a sound-muffling structure 230, an air inlet connector 240 and an air outlet connector 250;

the blower 220 is accommodated in the accommodating cavity 211, an air inlet of the blower 220 is communicated with the mixed flow channel 212, an air outlet of the blower 220 is communicated with the exhaust joint 250, and the air inlet joint 240 is communicated with the mixed flow channel 212; therefore, air and oxygen can be introduced into the mixed flow channel 212 through the air inlet joint 240, and the air and oxygen in the mixed flow channel 212 can be mixed in the mixed flow channel 212 and enter the fan 220 through the air inlet of the fan 220, so that mixing and pressurization can be carried out under the action of the fan 220, and then the pressurized gas is led out through the air outlet joint 250 for use;

in the above process, the fan 220 generates noise along with the operation of the fan 220, and the operation state of the fan 220 changes according to the operation mode and the difference of the oxygen concentration, that is, the magnitude and the frequency of the dynamic noise change; in order to prevent dynamic noise generated in the operation process of the fan 220 from affecting a user and further affecting the use experience of the user, the accommodating cavity 211 is internally provided with a silencing structure 230, and the noise generated by the fan 220 can be eliminated through the silencing structure 230;

in order to eliminate the noise generated by the fan 220, when the noise reduction structure 230 is disposed, a manner of disposing the porous plate 231 in the accommodating cavity 211 is adopted, the porous plate 231 is disposed around the outer circumference of the fan 220 and spaced from the outer circumference of the fan 220 and the inner wall of the accommodating cavity 211, so that the porous plate 231 disposed in the accommodating cavity 211 can form a noise reduction cavity in the space of the outer circumference of the fan 220, and in the noise reduction process, the principle of resonance noise reduction of the micro perforated thin plate is utilized, and since the porous plate 231 is spaced from the outer circumference of the fan 220 and the inner wall of the accommodating cavity 211, air layers are formed on the inner side and the outer side of the porous plate 231, and thus, a resonance system composed of mass and spring can be considered. When the frequency of the incident sound wave of the noise generated by the operation of the fan 220 is consistent with the resonance frequency of the resonance system formed by the porous plate 231, the air columns in the plurality of holes on the porous plate 231 rub and vibrate back and forth in the holes, so that the sound energy can be consumed, the absorption effect is enhanced, an absorption peak is formed, the sound energy is obviously attenuated, and the sound absorption effect on the low and medium frequency sound is obvious;

when setting up perforated plate 231, perforated plate 231 is the perforation aluminum plate, when seting up the hole body moreover, can be so that the perforation aluminum plate has the hole of the hole body tiny, and the hole body distributes evenly and link up each other and the outside open characteristic in surface to make the sound wave easily get into the internal portion in hole. When sound waves are incident into the air damping device, air in the pores can be caused to vibrate, and due to viscous resistance of the air, the vibrating air is continuously converted into heat energy so as to attenuate sound wave energy;

in addition, when the sound wave passes through the hole body, the air is adiabatically compressed and heated, and the sound energy can be attenuated by the heat exchange and heat conduction with the porous plate 231, which mainly aims at the high-frequency component of the noise;

in conclusion, the breathing machine sound muffling box 200 can reduce noise generated when the fan 220 operates, thereby reducing interference of the noise to a user, improving user experience, and avoiding influence on sleep of the user.

In this embodiment, the thickness of the porous plate 231 is 1mm, and the diameter of the hole body on the porous plate 231 is 2mm; in other embodiments of the present invention, the thickness parameter and the parameters of the hole body can be adjusted according to the requirement of sound attenuation.

Further, referring to fig. 1-6, in the present embodiment, the sound-deadening structure 230 further includes sound-deadening cotton 232; the silencing cotton 232 is accommodated in the accommodating cavity 211, arranged along the contour of the inner wall of the accommodating cavity 211, and spaced from the porous plate 231. Through the arrangement mode, a composite sound absorption structure can be formed in the accommodating cavity 211, so that the frequency band of sound absorption is widened, and the purpose of noise reduction is achieved.

Thus, when the frequency of the noise generated by the operation of the fan 220 is close to the resonant frequency of the porous plate 231, the air in the pores of the porous plate 231 begins to vibrate and rub back and forth to dissipate the sound energy; when the noise reduction cotton 232 is far away from the resonance frequency, sound waves enter the noise reduction cotton 232 through the small holes to cause the air in the pores among the tendons in the noise reduction cotton 232 to move back and forth, but because the tendons are fixed, the air on the surfaces of the tendons is not easy to move due to the influence of the tendons, so that the phenomenon of 'fast or slow' occurs at the air movement speed near the tendons, namely, a speed gradient exists; because of the viscous resistance of the air, the sound energy between the tendons and the veins can be converted into heat energy, so that the sound wave is attenuated; in addition, the density process of the sound waves can be equivalent to an adiabatic process, the temperature can rise when air is subjected to adiabatic compression, and the temperature can fall when air is subjected to adiabatic expansion; due to the heat conduction effect, heat exchange is continuously generated between the air and the ribs, and sound energy is also converted into heat energy, so that the sound wave is attenuated.

Further, referring to fig. 1 to 9, in the present embodiment, when the main body 210 is disposed, the main body 210 further has a sound insulation function, and when the main body 210 is disposed, a split-type structure is adopted to facilitate installation of the blower 220, specifically, the main body 210 includes a housing 213, a first cover 214 and a second cover 215; the first cover body 214 and the second cover body 215 are respectively covered on two ends of the housing 213, the first cover body 214 and the housing 213 jointly define the accommodating cavity 211, and the second cover body 215 and the housing 213 jointly define the mixed flow channel 212. Wherein, through the above-mentioned structural arrangement, can also make mixed flow passageway 212 and holding chamber 211 mutual isolation to form the independent amortization chamber that carries out the amortization to fan 220, can also avoid both to produce simultaneously and interfere.

On the basis of the partition 216, in order to position and mount the porous plate 231, a plurality of clamping portions 265 are disposed on one side of the partition 216 facing the first cover 214, and the clamping portions 265 are all located between the outer periphery of the fan 220 and the inner peripheral surface of the sound-deadening cotton 232; the plurality of engagement portions 265 are each adapted to engage with the perforated plate 231.

In order to isolate the mixed flow channel 212 from the receiving cavity 211, the main body 210 further includes a partition 216 connected to the housing 213, the partition 216 is located between the first cover 214 and the second cover 215; the partition plate 216 and the first cover 214 jointly define the accommodating cavity 211, and the blower 220 located in the accommodating cavity 211 is connected with the first cover 214 and the partition plate 216; the side of the partition 216 facing away from the first cover body 214 is provided with a flow mixing groove 217, and the flow mixing groove 217 and the second cover body 215 together define the flow mixing channel 212.

Therefore, through the structural arrangement, the inner cavity of the main body 210 can be divided by the partition plate 216, and the partition plate 216 can play a role in installing the fan 220 while forming the accommodating cavity 211 with the first cover body 214 and the mixed flow channel 212 with the second cover body 215.

On the premise of the partition plate 216, since the blower 220 in the accommodating cavity 211 is connected to the partition plate 216, in order to facilitate the conduction between the blower 220 and the mixed flow channel 212 on the other side of the partition plate 216, the partition plate 216 is provided with an air guide hole 218, and the mixed flow channel 212 is communicated with an air inlet of the blower 220 through the air guide hole 218.

In the working process of the fan 220, in order to absorb the vibration generated during the operation of the fan 220, a shock absorption sponge 264 is disposed at the joint of the fan 220 and the first cover body 214, and a silica gel pad 262 is disposed at the joint of the fan 220 and the partition 216.

In order to improve the sealing performance of the joints between the main body 210 and the first and

second covers

214 and 215 when the first and

second covers

214 and 215 are attached, a first sealing member 261 is provided at the joint between the fan 220 and the first cover 214, and a second sealing member 263 is provided between the joint between the second cover 215 and the casing 213.

Further, referring to fig. 1 to 9, in the present embodiment, when the air inlet connector 240 is disposed, air and oxygen can be independently supplied, that is, the air inlet connector 240 includes an air connector 241 and an oxygen connector 242, and the air connector 241 and the oxygen connector 242 are connected to the housing 213 or the second cover 215; in addition, when the oxygen joint 242 is provided, the high pressure oxygen joint 242 and the first oxygen joint 242 may be provided separately according to the difference in oxygen pressure.

In order to filter impurities in the introduced air, a filter member 243 is provided in the air joint 241;

specifically, when the air joint 241 and the oxygen joint 242 are provided, the air joint 241 and the oxygen joint 242 may be manufactured by a manufacturing method of integrally molding with the housing 213, and when the exhaust joint 250 is attached, the housing 213 may be provided with an attachment groove 219 for attaching the exhaust joint 250.

It should be noted that, in the embodiment of the present invention, the air inlet connector 240 and the mixed flow channel 212 are not provided with a sound-deadening sponge, so that it is prevented that the sponge is degraded into small-particle dust and other toxic gases during use, and then swallowed or inhaled by a patient during use of the device, which may cause damage to the life safety of the user.

In summary, referring to fig. 1-9, the ventilator sound-muffling box 200 has the following advantages:

the position of the cavity where the fan 220 is located adopts a composite sound absorption structure consisting of a porous plate 231, an air layer and a rigid wall of the shell 213;

the contour shape of the perforated plate can be adjusted along with the contour shape of the fan 220, and the shape and the position of the surface perforation influence the resonance frequency;

the air inlet joint 240 and the mixed flow channel 212 are not provided with silencing sponges, so that airflow resistance in the air inlet joint 240 and the mixed flow channel 212 is reduced, air flows more smoothly, tiny dust generated by silencing sponges and degradation is avoided, and machine safety is improved;

the gas only flows in the fixed gas path, and local vortex is not formed.

The above description is only for the specific embodiments 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 also within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a breathing machine whistle box which characterized in that:

the breathing machine silencing box comprises a main body, a fan, a silencing structure, an air inlet joint and an air outlet joint;

the fan is used for mixing and pressurizing the air and the oxygen introduced by the air inlet joint and then leading out the air and the oxygen by the air outlet joint.

2. The ventilator sound muffling box of claim 1, wherein:

the noise reduction structure also comprises noise reduction cotton; the silencing cotton is contained in the containing cavity, arranged along the contour of the inner wall of the containing cavity and arranged at intervals with the porous plate.

3. The ventilator sound muffling box according to claim 1 or 2, wherein:

the main body comprises a shell, a first cover body and a second cover body; the first cover body and the second cover body are respectively covered at two ends of the shell, the first cover body and the shell jointly limit the accommodating cavity, and the second cover body and the shell jointly limit the mixed flow channel.

4. The ventilator sound muffling box of claim 3, wherein:

the main body further comprises a partition plate connected with the shell, and the partition plate is positioned between the first cover body and the second cover body;

the partition plate and the first cover body jointly define the accommodating cavity, and the fan positioned in the accommodating cavity is connected with the first cover body and the partition plate; one side of the partition plate, which is far away from the first cover body, is provided with a mixed flow groove, and the mixed flow groove and the second cover body jointly limit the mixed flow channel.

5. The ventilator sound muffling box of claim 4, wherein:

the baffle plate is provided with an air guide hole which communicates the mixed flow channel with an air inlet of the fan.

6. The ventilator sound muffling box of claim 4, wherein:

the fan with the junction of first lid is provided with first sealing member and shock attenuation sponge, the fan with the junction of baffle is provided with the silica gel pad.

7. The ventilator sound muffling box of claim 4, wherein:

and a second sealing element is arranged between the joint of the second cover body and the shell.

8. The ventilator sound muffling box of claim 3, wherein:

the air inlet joint comprises an air joint and an oxygen joint, and the air joint and the oxygen joint are connected with the shell or the second cover body; and a filter element is arranged in the air joint.

9. The ventilator sound muffling box of claim 3, wherein:

the shell is provided with a mounting groove for mounting the exhaust joint.

10. The ventilator sound muffling box of claim 4, wherein:

a plurality of clamping parts are arranged on one side, facing the first cover body, of the partition board, and the clamping parts are located between the outer periphery of the fan and the inner peripheral surface of the silencing cotton; a plurality of the joint portion all is used for with the perforated plate joint.