CN219176656U

CN219176656U - Noise reduction air circuit structure and sleeping respirator

Info

Publication number: CN219176656U
Application number: CN202223584578.5U
Authority: CN
Inventors: 诸葛有运
Original assignee: Shenzhen Hingmed Medical Instrument Co ltd
Current assignee: Shenzhen Hingmed Medical Instrument Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-06-13
Anticipated expiration: 2032-12-30

Abstract

The utility model discloses a noise reduction air path structure and a sleeping respirator, wherein the noise reduction air path structure comprises a shell, a first cavity, a second cavity and a third cavity are axially formed in the shell, the first cavity is communicated with the third cavity, and the third cavity is communicated with the second cavity; the air filter is arranged at one end of the shell and extends into the first cavity; the perforated pipe is arranged in the shell, the first cavity is communicated with the third cavity through the perforated pipe, the air filter, the first cavity and the perforated pipe form a resistance expansion muffler, and the second cavity and the perforated pipe form a resonance muffler; the fan assembly is arranged in the second cavity in the shell to accelerate the gas to generate high-pressure airflow; the rectifier is arranged corresponding to the air outlet end of the fan assembly and can rectify high-pressure air flow and supply air outwards. According to the technical scheme, the porous sound absorption material can be avoided, meanwhile, the whole machine is smaller in size, and the noise reduction effect is better.

Description

Noise reduction air circuit structure and sleeping respirator

Technical Field

The utility model relates to the technical field of respirators, in particular to a noise reduction air circuit structure and a sleeping respirator.

Background

The sleeping ventilator provides airflow to the patient through a given pressure or minute ventilation, thereby improving the hypoxia problem of the patient while sleeping. The sleeping respiratory apparatus is mainly used for treating sleep apnea syndrome (airway collapse and central apnea), and can also treat complications of sleep apnea syndrome, improve blood oxygen concentration of a user during sleeping at night, treat hypoxia and the like. The sleeping respirator is characterized in that air flow with preset pressure or ventilation capacity generated by a fan is conveyed to a patient through a humidifier, a breathing pipeline and a nose mask. When the breathing machine works, a motor in the fan drives the fan blade, high-speed rotation of the fan blade can generate vibration noise and aerodynamic noise, and the noise can seriously influence sleeping quality of a user through outward transmission of the fan. In the prior art, a muffler is usually manufactured by filling noise-reducing cotton inside. The structure has the following problems that 1, the noise reduction cotton is a porous sound absorption material, most of the noise reduction cotton is formed by foaming plastic such as polyurethane, and the porous sound absorption material can age after long-term use, generate a plurality of fine particles, are carried into the lung of a patient by air flow, are deposited in the lung of the patient, and seriously harm the body health of the patient. 2. The porous sound absorbing material is arranged in the air passage, dust is collected, bacteria and viruses are bred, and the patient cannot clean and disinfect the air passage in the air passage, so that the health of the patient is seriously endangered. 3. Because the porous sound absorbing material needs to reach a certain thickness to have the silencing effect, the gas circuit needs a large volume to achieve the silencing effect, so the whole machine has a large volume.

Disclosure of Invention

The utility model mainly aims to provide a noise reduction air circuit structure and a breathing machine, and aims to reduce the noise of the breathing machine and reduce the volume of the whole machine on the premise of not using a porous sound absorption material.

In order to achieve the above object, the noise reduction air path structure provided by the present utility model is applied to a breathing machine, and the noise reduction air path structure includes:

the shell is axially provided with a first cavity, a second cavity and a third cavity, wherein the first cavity is communicated with the third cavity, and the third cavity is communicated with the second cavity;

the air filter is arranged at one end of the shell and extends into the first cavity to filter external air;

the perforated pipe is arranged in the shell, the first cavity is communicated with the third cavity through the perforated pipe so as to convey filtered gas, the air filter, the first cavity and the perforated pipe form a resistance expansion muffler, and the second cavity and the perforated pipe form a resonance muffler;

the fan assembly is arranged in the second cavity in the shell to accelerate gas to generate high-pressure airflow;

and the rectifier is arranged corresponding to the air outlet end of the fan assembly so as to rectify the high-pressure airflow into laminar flow and supply air outwards through the second cavity.

Optionally, the shell comprises an air channel inlet cover, an air channel upper cover, an air channel middle cover and an air channel lower cover, wherein the air channel upper cover is divided into an upper cover inlet area and an upper cover resonance area, and the air channel inlet cover and the upper cover inlet area form a first cavity;

the middle cover of the air circuit is divided into a middle cover negative pressure region, a middle cover high pressure region, a middle cover resonance region, a middle cover differential pressure hole and a middle cover air outlet, the middle cover resonance region and the upper cover resonance region form a second cavity, the middle cover air outlet is communicated with the air inlet end of the fan assembly, and the middle cover air outlet, the perforated pipe and the third cavity form another resistance expansion muffler;

the gas circuit lower cover is divided into a lower cover negative pressure region and a lower cover high pressure region, the lower cover negative pressure region and the middle cover negative pressure region form a third cavity, and the lower cover high pressure region, the middle cover differential pressure hole and the middle cover high pressure region form a high pressure channel.

Optionally, the gas circuit sealing device further comprises a middle cover sealing gasket and a lower cover sealing gasket, wherein the middle cover sealing gasket is positioned between the gas circuit upper cover and the gas circuit middle cover, and the lower cover sealing gasket is positioned between the gas circuit middle cover and the gas circuit lower cover.

Optionally, the fan assembly includes a fan fixing support, a turbo fan mounted on the fan fixing support, and a fan cushion pad disposed between the fan fixing support and the turbo fan.

Optionally, the air conditioner further comprises a fan outlet sealing gasket arranged at the outlet of the turbine fan and a fan wire sealing gasket arranged at the outer side of the turbine fan, wherein the fan wire sealing gasket and the middle cover sealing gasket jointly wrap a power line and a data line of the turbine fan.

Optionally, the outer side of the fan fixing support is provided with wavy bulges.

Optionally, the wall of the perforated pipe is provided with holes with the aperture of more than 0.5mm and less than 3mm, and the number of the holes is 2-30.

Optionally, the air filter includes filter upper cover, filter cotton and filter lower cover, filter cotton is located between filter upper cover and the filter lower cover, filter upper cover butt air access cover, the filter lower cover is located first cavity.

Optionally, the device also comprises a flow sensor and a flow sensor sampling sealing gasket arranged on the outer side of the middle cover of the gas circuit, wherein the flow sensor is communicated with the differential pressure hole of the middle cover through the flow sensor sampling sealing gasket.

In order to achieve the above purpose, the utility model provides a sleeping respirator, which comprises the noise reduction air path structure.

The technical scheme of the utility model mainly comprises a shell, an air filter, a perforated pipe, a fan assembly and a rectifier, wherein a first cavity, a second cavity and a third cavity are formed in the shell, the air filter, the first cavity and the perforated pipe form a resistance expansion muffler, the second cavity and the perforated pipe form a resonance muffler, and the combination of the cavity structure of the shell, the perforated pipe and the air filter is utilized to replace a porous sound absorption material to reduce noise, so that the health potential safety hazard caused by using the porous sound absorption material can be avoided, the whole machine is smaller in volume, the noise reduction effect is better, and the user experience can be improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an exploded view of a sleep ventilator according to the present utility model;

FIG. 2 is a schematic view of an exploded view of a sleeping ventilator according to the present utility model;

FIG. 3 is a cross-sectional view of a sleep ventilator according to the present utility model from one perspective;

fig. 4 is a cross-sectional view of another view of the sleep ventilator of the present utility model.

Reference numerals illustrate:

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the achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, "and/or" throughout this document includes three schemes, taking a and/or B as an example, including a technical scheme, a technical scheme B, and a technical scheme that both a and B satisfy; in addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The embodiment of the utility model provides a noise reduction gas circuit structure, which aims at utilizing the gas circuit structure of a shell in a breathing machine to be combined with internal parts to form a noise reduction structure, further replacing the porous sound absorption material to reduce noise in the breathing machine, has better noise reduction performance, can also save cost and reduce the volume of the whole machine. The specific structure of the noise reduction air path structure is shown in the following embodiments.

The specific structure of the noise reduction gas path structure will be mainly described below.

Referring to fig. 1 to 4, in an embodiment of the present utility model, a noise reduction air path structure is applied to a ventilator. The noise reduction air circuit structure comprises:

the shell is axially provided with a first cavity A, a second cavity B and a third cavity C, wherein the first cavity A is communicated with the third cavity C, and the third cavity C is communicated with the second cavity B;

an air filter 6, wherein the air filter 6 is installed at one end of the housing and extends into the first cavity A to filter external air;

the perforated pipe 14 is arranged in the shell, the first cavity A is communicated with the third cavity C through the perforated pipe 14 so as to convey filtered gas, the air filter 6, the first cavity A and the perforated pipe 14 form a resistance expansion muffler, and the second cavity B and the perforated pipe 14 form a resonance muffler;

the fan assembly is arranged in the second cavity B in the shell to accelerate gas to generate high-pressure airflow;

and the rectifier 3 is arranged corresponding to the air outlet end of the fan assembly, so that the high-pressure air flow is rectified to be laminar and is supplied to the outside through the second cavity B.

The above-mentioned casing is generally cylindrical, and the casing is divided into a plurality of parts to divide the casing into a first cavity a, a second cavity B and a third cavity C. The first cavity A is an integral air inlet end, the first cavity A is communicated with the third cavity C through a perforated pipe 14, the third cavity C is communicated with the second cavity B, and the second cavity B is an air outlet end of the integral machine so as to supply air to a user. An air filter 6 is provided at the air intake end for filtering dust and bacteria in the outside air. In particular, the air filter 6 employs a HAPA cartridge to provide a clean and hygienic supply of gas to the patient. The perforated pipe 14 is mainly used for communicating the first cavity a with the third cavity C, so as to facilitate the transportation of the filtered gas. The fan assembly is provided with a second cavity B for accelerating the filtered gas to generate high-pressure air flow. It will be appreciated that the high pressure air flow described above is a pressure air flow for use by a patient. The high pressure air flow generated by the fan assembly is usually turbulent, and the rectifier 3 can rectify the high pressure air flow to form laminar flow and convey the air outwards through the second cavity B. The flow rectifier 3 has a ring shape, corresponding to an extended flow path length, which is advantageous for shaping turbulence into laminar flow. In addition, after rectification by the rectifier 3, the high-pressure air flow is more stable, and the gas flow of the high-pressure air flow is conveniently collected, so that the rotating speed of the fan assembly is adjusted subsequently.

By utilizing the structure of the embodiment, the air filter 6, the first cavity A and the perforated pipe 14 form a resistance expansion muffler, and the second cavity B and the perforated pipe 14 form a resonance muffler, so that noise generated during the operation of the fan assembly can be absorbed and reduced by replacing porous sound absorbing materials, and the problems caused by the adoption of the porous sound absorbing materials are avoided.

In this embodiment, the noise reduction effect of the present embodiment is particularly important for the three cavity structures formed in the housing, and the specific structure of the housing is described below.

Specifically, the shell comprises an air passage inlet cover 5, an air passage upper cover 4, an air passage middle cover 2 and an air passage lower cover 1, wherein the air passage upper cover 4 is divided into an upper cover inlet area 401 and an upper cover resonance area 402, and the air passage inlet cover 5 and the upper cover inlet area 401 form a first cavity A;

the middle cover 2 of the air circuit is divided into a middle cover negative pressure region 201, a middle cover high pressure region 202, a middle cover resonance region 205, a middle cover differential pressure hole 203 and a middle cover air outlet 204, the middle cover resonance region 205 and the upper cover resonance region 402 form a second cavity B, the middle cover air outlet 204 is communicated with the air inlet end of the fan assembly, and the middle cover air outlet 204, the perforated pipe 14 and the third cavity C form another resistance expansion muffler;

the air passage lower cover 1 is divided into a lower cover negative pressure region 101 and a lower cover high pressure region 102, the lower cover negative pressure region 101 and the middle cover negative pressure region 201 form a third cavity C, and the lower cover high pressure region 102, the middle cover differential pressure hole 203 and the middle cover high pressure region 202 form a high pressure channel.

The air passage inlet cover 5, the air passage upper cover 4, the air passage middle cover 2 and the air passage lower cover 1 are sequentially arranged according to the direction of the air inlet end of the equipment, wherein the air passage inlet cover 5 is close to the air inlet end of the equipment. The inner part of the air channel upper cover 4 is divided into two parts, namely an upper cover inlet area 401 and an upper cover resonance area 402, the upper cover inlet area 401 and the air channel inlet cover 5 are enclosed to form a first cavity A, and the first cavity A, the air filter 6 and the perforated pipe 14 form a resistance expansion muffler.

The middle cover 2 of the air path is divided into a middle cover negative pressure region 201, a middle cover high pressure region 202, a middle cover resonance region 205, a middle cover differential pressure hole 203 and a middle cover air outlet 204, wherein the middle cover resonance region 205 and the upper cover resonance region 402 form a second cavity B, and the second cavity B is a resonance cavity, and forms a resonance muffler with the perforated pipe 14 for eliminating noise with specific frequency. The differential pressure signals are generated at the middle cover differential pressure holes 203, the pressure differences generated by the airflows with different flow rates passing through the middle cover differential pressure holes 203 are different, and the flow rate sensor can collect the flow rate of the airflows by detecting the pressure differences. The air flow enters the fan assembly, specifically a turbo fan in the fan assembly, through the middle cap air outlet 204. In addition, the middle cap high pressure region 202, the rectifier 3, the middle cap differential pressure orifice 203, and the lower cap high pressure region 102 constitute a high pressure channel for transporting the gas flow. The air passage lower cover 1 is divided into a lower cover negative pressure area and a lower cover high pressure area 102, the lower cover negative pressure area 101 and the middle cover negative pressure area 201 form a third cavity, and the third cavity, the perforated pipe 14 and the middle cover air outlet 204 form another resistance expansion muffler.

In the above embodiment, in order to better realize separation of each cavity, the present solution is further provided with a plurality of sealing structures. The gas circuit sealing device further comprises a middle cover sealing gasket 10 and a lower cover sealing gasket 12, wherein the middle cover sealing gasket 10 is positioned between the gas circuit upper cover 4 and the gas circuit middle cover 2, and the lower cover sealing gasket 12 is positioned between the gas circuit middle cover 2 and the gas circuit lower cover 1. The middle cover gasket 10 and the lower cover gasket 12 in this embodiment are both part of the high-pressure channel, which is beneficial to improving the air tightness of the high-pressure channel. The middle cover sealing gasket 10 is used for sealing the gas path upper cover 4 and the gas path middle cover 2, and the lower cover sealing gasket 12 is used for sealing the gas path middle cover 2 and the gas path lower cover 1.

In some embodiments, the fan assembly includes a fan mounting bracket 9, a turbo fan 8 mounted on the fan mounting bracket 9, and a fan cushion 7 disposed between the fan mounting bracket 9 and the turbo fan 8. The thickness of the fan cushion 7 can be designed according to practical requirements, and the fan cushion 7 is mainly used for providing buffering for the turbine fan 8, weakening vibration and reducing noise. Specifically, the fan fixing support 9 may also adopt a corresponding structure to attenuate vibration, for example, a wave-shaped protrusion 91 is formed on the outer side of the fan fixing support 9. It will be appreciated that the protrusion 91 may also be fin-shaped or the like.

Specifically, the air conditioner further comprises a fan outlet sealing gasket 11 arranged at the outlet of the turbine fan 8 and a fan wire sealing gasket 13 arranged at the outer side of the turbine fan 8, wherein the power wire and the data wire of the turbine fan 8 are jointly wrapped by the fan wire sealing gasket 13 and the middle cover sealing gasket 10. The fan outlet gasket 11 is used to guide the gas from the outlet of the turbo fan 8 into the middle cap high pressure area 202. The fan wire gasket 13 and the middle cover gasket 10 jointly wrap the power line and the data line of the turbine fan 8, and air flow is prevented from leaking from the power line and the data line of the turbine fan 8.

In some embodiments, the wall of the perforated pipe 14 is provided with holes 141 with a diameter greater than 0.5mm and less than 3mm, and the number of holes 141 is 2-30. The specific pore diameter of the openings 141 on the perforated pipe 14 and the number of the openings 141 can be selected according to practical requirements.

Specifically, the air filter 6 includes a filter upper cover 601, a filter cotton 602, and a filter lower cover 604, the filter cotton 602 is located between the filter upper cover 601 and the filter lower cover 604, the filter upper cover 601 abuts against the air inlet cover 5, and the filter lower cover 604 is located in the first cavity a. The filter cotton 602 of the air filter 6 can also be replaced by other filter materials to remove dust and bacteria from the air. The filter upper cover 601 abuts the air passage inlet cover 5 through the filter seal 603.

In some embodiments, the device further comprises a flow sensor and a flow sensor sampling sealing gasket 15 arranged outside the middle cover 2 of the gas circuit, wherein the flow sensor is communicated with the differential pressure hole 203 of the middle cover through the flow sensor sampling sealing gasket 15. The flow sensor sampling gasket 15 is used for transmitting a differential pressure signal generated at the middle cover differential pressure hole 203 to the flow sensor, and then the differential pressure signal is transmitted to the control part by the flow sensor, and further controlling the rotating speed of the turbine fan 8.

For better explanation of the present embodiment, the principle of the noise reduction gas path structure will be explained with reference to specific structures and fig. 3 and 4 of the accompanying drawings, and arrows in fig. 3 and 4 indicate gas flow directions. When the turbofan 8 works, negative pressure is generated at the fan inlet 81 of the turbofan 8, air flow enters the first cavity from the air filter 6, flows through the perforated pipe 14 and flows into the third cavity, then flows into the fan inlet from the middle cover air outlet 204, after the air flow is accelerated by the fan blades of the turbofan 8, the set pressure is generated, the air flow enters the rectifier 3 from the outlet of the turbofan 8 through the fan outlet sealing gasket 11, flows through the middle cover differential pressure hole 203 and enters the lower cover high-pressure area 102 and the middle cover high-pressure area 202 to form a high-pressure channel, and finally, air supply to a patient is realized.

In the utility model, the sleeping respirator comprises the noise reduction air path structure. The specific structure of the noise reduction air path structure is referred to the above embodiments, and will not be described herein. The sleeping respirator of the embodiment adopts the noise reduction air path structure, so that the sleeping respirator has all the advantages and effects of the noise reduction air path structure.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims

1. The utility model provides a gas circuit structure of making an uproar falls, is applied to the breathing machine, its characterized in that falls the gas circuit structure of making an uproar includes:

2. The noise reduction air path structure according to claim 1, wherein the housing comprises an air path inlet cover, an air path upper cover, an air path middle cover and an air path lower cover, the air path upper cover is divided into an upper cover inlet area and an upper cover resonance area, and the air path inlet cover and the upper cover inlet area form a first cavity;

3. The noise reduction air path structure of claim 2, further comprising a middle cover gasket and a lower cover gasket, wherein the middle cover gasket is positioned between the air path upper cover and the air path middle cover, and the lower cover gasket is positioned between the air path middle cover and the air path lower cover.

4. A noise reduction air path structure according to claim 3, wherein the fan assembly comprises a fan mounting bracket, a turbo fan mounted on the fan mounting bracket, and a fan cushion disposed between the fan mounting bracket and the turbo fan.

5. The noise reduction air path structure according to claim 4, further comprising a fan outlet gasket disposed at an outlet of the turbine fan, and a fan wire gasket disposed at an outer side of the turbine fan, wherein the fan wire gasket and the middle cover gasket together wrap a power line and a data line of the turbine fan.

6. The noise reduction air path structure according to claim 4, wherein the fan fixing bracket is formed with a wave-shaped protrusion on an outer side thereof.

7. The noise reduction air path structure according to claim 2, wherein the wall of the perforated pipe is provided with holes with the aperture of more than 0.5mm and less than 3mm, and the number of the holes is 2-30.

8. The noise reduction air path structure of claim 2, wherein the air filter comprises a filter upper cover, a filter cotton and a filter lower cover, the filter cotton is located between the filter upper cover and the filter lower cover, the filter upper cover abuts the air path inlet cover, and the filter lower cover is located in the first cavity.

9. The noise reduction air path structure according to claim 2, further comprising a flow sensor and a flow sensor sampling gasket disposed outside the air path cover, wherein the flow sensor is in communication with the middle cover differential pressure hole through the flow sensor sampling gasket.

10. A sleep ventilator comprising a noise reducing airway structure as claimed in any of claims 1 to 9.