WO2020024914A1 - Noise reduction device, pneumatic path comprising the noise reduction device and respiratory system comprising the same - Google Patents

Noise reduction device, pneumatic path comprising the noise reduction device and respiratory system comprising the same Download PDF

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Publication number
WO2020024914A1
WO2020024914A1 PCT/CN2019/098244 CN2019098244W WO2020024914A1 WO 2020024914 A1 WO2020024914 A1 WO 2020024914A1 CN 2019098244 W CN2019098244 W CN 2019098244W WO 2020024914 A1 WO2020024914 A1 WO 2020024914A1
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WO
WIPO (PCT)
Prior art keywords
noise reduction
chamber
reduction device
tube body
pneumatic
Prior art date
Application number
PCT/CN2019/098244
Other languages
French (fr)
Inventor
Yonghui Chen
Junming HUANG
Chonghui FAN
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Resvent Medical Technology Co., Ltd.
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Publication date
Application filed by Resvent Medical Technology Co., Ltd. filed Critical Resvent Medical Technology Co., Ltd.
Publication of WO2020024914A1 publication Critical patent/WO2020024914A1/en

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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
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • 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
    • A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
    • 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
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
    • A61M16/0816—Joints or connectors
    • 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

Definitions

  • the present application relates to the field of medical devices, and in particular to a noise reduction device, a pneumatic path comprising the noise reduction device and a respiratory system comprising the same.
  • a respiratory system can replace, control or change a patient's normal physiological breathing.
  • the respiratory system is often used to increase the patient's lung ventilation, so as to improve the patient's respiratory function, reduce respiratory power consumption, and save the patient's heart reserve.
  • a respiratory apparatus is used to supply breathable gas.
  • a blower is an important component of the respiratory apparatus which is used to pressurize gas. The pressurized gas is delivered to the patient through pneumatic path which is communicated with the patient.
  • the gas pressurized by a high-speed blower is directly delivered to the patient through the pneumatic path of the respiratory system, or delivered to the patient after reducing niose by passing the gas pressurized by a high-speed blower through a simple muffler with a muffling cotton inside.
  • the blower While the gas pressurized by a high-speed blower is directly delivered to the patient through the pneumatic path of the respiratory system, the blower is directly communicated with the pneumatic path, strong noise is generated by the blower during the high-speed operation, and low-frequency noise is generated by the blower motor, both of the strong noise and the low-frequency noise are delivered to the patient through the pneumatic path of the respiratory system, so as to affect the therapeutic effect of the respiratory system on the patient, and affect the performance of the respiratory system.
  • the gas pressurized by a high-speed blower is delivered to the patient after reducing niose by passing the gas through a simple muffler with a muffling cotton inside
  • the muffling cotton has poor noise reduction effect, most of the noise can pass or penetrate the muffling cotton, the noise can not be reduced completely.
  • the muffling cotton in the muffler connected with the pneumatic path needs to be replaced frequently, or the entire muffler needs to be replaced, which causes great waste and pollution.
  • the present application provides a noise reduction device, a pneumatic path comprising the noise reduction device and a respiratory system comprising the same.
  • the noise reduction device can be used for a long time without replacing internal parts. Through the noise reduction device, the noise generated by the blower during the high-speed operation can be effectively reduced while delivered to the patient by the pneumatic path of the respiratory system.
  • a noise reduction device comprising: a tube body, a rectifying component, a first pneumatic connector and a second pneumatic connector;
  • the rectifying component is disposed in the tube body, the rectifying component divides the tube body into a first chamber and a second chamber, the rectifying component comprises a plurality of gas circulation channels, the first chamber is communicated with the second chamber through the plurality of gas circulation channels.
  • the rectifying component comprises a channel extended axially, and two ends of the channel extended axially are respectively provided with a first component having the form of a cone and a second component having the form of a cone, the two ends of the channel extended axially are respectively closed by the first component having the form of a cone and the second component having the form of a cone.
  • the rectifying component comprises a channel extended axially, one end of the channel extended axially is open, the other end of the channel extended axially is close.
  • the first pneumatic connector comprises a port extended outward, another port oriented inward, and a bulge; the port extended outward is directly connected with outlet of the respiratory apparatus, or connected with the outlet of the respiratory apparatus through a conduit; the port oriented inward is located in the first chamber; the bulge abuts against the inner wall of the tube body.
  • the port oriented inward is provided with a first opening extended toward the first chamber, and the outer wall of the first opening is provided with a plurality of first apertures; the first opening end of the first opening is close; the first pneumatic connector is communicated with the first chamber through the first apertures.
  • the end of the channel extended axially which is open is provided with a limiting portion, and the first opening end which is close abuts against the limiting portion.
  • the plurality of the gas circulation channels are evenly distributed on the outer wall of the channel extended axially, and the inner diameter of the gas circulation channels is smaller than the inner diameter of the channel extended axially.
  • the other end of the channel extended axially which is close is provided with a second opening extended outward, the outer wall of the second opening is provided with a plurality of second apertures, and the second opening is communicated with the second chamber through the second apertures;
  • an end of the second opening abuts against the inner wall of the second pneumatic connector, and the second opening is communicated with the second pneumatic connector.
  • a pneumatic path comprising any of the above noise reduction devices.
  • a respiratory system comprising any of the above pneumatic paths, and a respiratory apparatus, wherein the respiratory apparatus supplies breathable gas pressurized by a blower included in the the respiratory apparatus.
  • the present application provides a noise reduction device, a pneumatic path comprising the noise reduction device and a respiratory system comprising the same.
  • the noise reduction device comprises a tube body, a rectifying component, a first pneumatic connector and a second pneumatic connector.
  • the first pneumatic connector and the second pneumatic connector are respectively connected with the two ends of the tube body.
  • the rectifying component is disposed in the tube body, the rectifying component divides the tube body into the first chamber and the second chamber.
  • the rectifying component comprises a plurality of gas circulation channels, the first chamber is communicated with the second chamber through the plurality of gas circulation channels.
  • the gas pressurized by the blower and the noise generated by the blower circulate from the outlet tube of the respiratory apparatus, then circulate into the first chamber through the first pneumatic connector, and are buffered in the first chamber, then circulate into the second chamber through the plurality of gas circulation channels of the rectifying component, and are combed and smoother by the rectifying component to reduce the aerodynamic noise, then converge in the second chamber to avoid gas flow reduction, finally circulate from the second pneumatic connector to the patient through the conduit connected with the patient.
  • the noise is reflected and/or refracted by the inner walls of the first chamber, the plurality of gas circulation channels, and the second chamber, so as to be reduced effectively.
  • the noise reduction device can be disassembled, cleaned ang disinfected conveniently, and can be reusable, and has long service life, and does not need to replace internal parts.
  • Figure 1 is an schematic view of an example noise reduction device
  • Figure 2 is an schematic view of another example noise reduction device
  • Figure 3 is an schematic view of another example noise reduction device
  • Figure 4 is an schematic view of another example noise reduction device
  • rectifying component 2 gas circulation channel 21, channel extended axially 22, first component having the form of a cone 23, second component having the form of a cone 24, limiting portion 221, second opening 25, second aperture 251;
  • first pneumatic connector 3 port extended outward 31, port oriented inward 32, bulge 33, first opening 34, first aperture 341, first opening end 342;
  • the present application provides a noise reduction device, the noise reduction device is applied to pneumatic path of the respiratory system.
  • the first pneumatic connector 3 of the noise reduction device is connected with the conduit which is connected with the outlet of the respiratory apparatus, or the first pneumatic connector 3 of the noise reduction device is connected with the outlet of the respiratory apparatus, the second pneumatic connector 4 of the noise reduction device is connected with the conduit which is communicated with the patient.
  • the noise reduction device comprises a tube body, a rectifying component, a first pneumatic connector and a second pneumatic connector.
  • the first pneumatic connector and the second pneumatic connector are respectively connected with the two ends of the tube body.
  • the rectifying component is disposed in the tube body, the rectifying component divides the tube body into the first chamber and the second chamber.
  • the rectifying component comprises a plurality of gas circulation channels, the first chamber is communicated with the second chamber through the plurality of gas circulation channels.
  • the gas pressurized by the blower and the noise generated by the blower circulate from the outlet conduit of the respiratory apparatus, then circulate into the first chamber through the first pneumatic connector, and are buffered in the first chamber, then circulate into the second chamber through the plurality of gas circulation channels of the rectifying component, and are combed and smoother by the rectifying component to reduce the aerodynamic noise, then converge in the second chamber to avoid gas flow reduction, finally circulate from the second pneumatic connector to the patient through the conduit connected with the patient.
  • the noise is reflected and/or refracted by the inner walls of the first chamber, the plurality of gas circulation channels, and the second chamber, so as to be reduced effectively.
  • the noise reduction device can be disassembled, cleaned ang disinfected conveniently, and can be reusable, and has long service life, and does not need to replace internal parts.
  • a noise reduction device in accordance with the present applicaion, is applied to pneumatic path of the respiratory system.
  • the noise reduction device comprises: a tube body 1, a rectifying component 2, a first pneumatic connector 3 and a second pneumatic connector 4; one end of the tube body 1 is detachably connected with the first pneumatic connector 3, and the other end of the tube body 1 is detachably connected or fixed with the second pneumatic connector 4; the rectifying component 2 is disposed in the tube body 1, the rectifying component 2 divides the tube body 1 into a first chamber 5 and a second chamber 6, the rectifying component 2 comprises a plurality of gas circulation channels 21, the first chamber 5 is communicated with the second chamber 6 through the plurality of gas circulation channels 21.
  • the tube body 1 has the form of a hollow cylinder, one end of the tube body 1 is detachably connected with the first pneumatic connector 3, and the other end of the tube body 1 is detachably connected or fixed with the second pneumatic connector 4; illustratively, the first pneumatic connector 3 is provided with a first bulge, the inner wall of the tube body 1 is provided with a first limiting portion, the first bulge of the first pneumatic connector 3 abuts against the first limiting portion of the inner wall of the tube body 1.
  • a sealing part may be placed in a groove which is provided on the first bulge.
  • the sealing part may be made of an elastic material such as silicon.
  • the second pneumatic connector 4 and the other end of the tube body 1 may be fabricated as one whole body. Or the second pneumatic connector 4 may be detachably connected with the other end of the tube body 1, detailedly, the second pneumatic connector 4 is provided with a second bulge, the inner wall of the tube body 1 is provided with a second limiting portion, the second bulge of the second pneumatic connector 4 abuts against the second limiting portion of the inner wall of the tube body 1.
  • a sealing part may be placed in a groove which is provided on the second bulge.
  • the sealing part may be made of an elastic material such as silicon.
  • the rectifying component is disposed in the tube body, the rectifying component divides the tube body into the first chamber and the second chamber.
  • the rectifying component comprises a plurality of gas circulation channels, the first chamber is communicated with the second chamber through the plurality of gas circulation channels.
  • the number of gas circulation channels 21 may be set as needed, and the more the number of gas circulation channels 21, the better the noise reduction effect.
  • the inner diameter of the gas circulation channels 21 may also be set as needed.
  • the plurality of gas circulation channels 21 may have the same size and a uniform distribution.
  • the plurality of gas circulation channels 21 may also have different sizes.
  • the first pneumatic connector 3 of the noise reduction device is connected with the conduit which is connected with the outlet of the respiratory apparatus, or the first pneumatic connector 3 of the noise reduction device is connected with the outlet of the respiratory apparatus, the second pneumatic connector 4 of the noise reduction device is connected with the conduit which is communicated with the patient.
  • the gas pressurized by the blower and the noise generated by the blower circulate from the outlet conduit of the respiratory apparatus, then circulate into the first chamber 5 through the first pneumatic connector 3, and are buffered in the first chamber 5, then circulate into the second chamber 6 through the plurality of gas circulation channels of the rectifying component, and are combed and smoother by the rectifying component to reduce the aerodynamic noise, then converge in the second chamber to avoid gas flow reduction, finally circulate from the second pneumatic connector 4 to the patient through the conduit connected with the patient.
  • the noise is reflected and/or refracted by the inner walls of the first chamber 5, the plurality of gas circulation channels 21, and the second chamber 6, so as to be reduced effectively.
  • the rectifying component 2 further comprises a channel extended axially 22, and two ends of the channel extended axially 22 are respectively provided with a first component having the form of a cone 23 and a second component having the form of a cone 24, the two ends of the channel extended axially are respectively closed by the first component having the form of a cone 23 and the second component having the form of a cone 24.
  • the plurality of the gas circulation channels 21 are evenly distributed on the outer wall of the channel extended axially 22.
  • the noise generated by the blower is reflected and/or refracted by the outer walls of the first component having the form of a cone 23 and the second component having the form of a cone 24, so as to be reduced effectively, and is prevented from circulating directly through the channel extended axially 22 to the patient.
  • the rectifying component 2 comprises a channel extended axially 22, one end of the channel extended axially 22 is open, the other end of the channel extended axially 22 is close, which prevents the noise generated by the blower from circulating directly through the channel extended axially 22 to the patient.
  • the first pneumatic connector 3 comprises a port extended outward 31, another port oriented inward 32, and a bulge 33.
  • the port extended outward 31 is directly connected with the outlet of the respiratory apparatus, or connected with the outlet of the respiratory apparatus through a conduit.
  • the port oriented inward 32 is located in the first chamber 5.
  • the bulge 33 abuts against the inner wall of the tube body 1, which prevents the first pneumatic connector 3 from moving within the tube body 1.
  • a sealing part may be placed in a groove which is provided on the bulge 33, which can ensure the airtightness of the joint between the first pneumatic connector 3 and the tube body 1, so as to prevent the gas from leaking out.
  • the sealing part may be made of an elastic material such as rubber or silicon.
  • the gas pressurized by the blower and the noise generated by the blower circulate from the outlet conduit of the respiratory apparatus, then circulate into the first chamber 5 through the first pneumatic connector 3, and are buffered in the first chamber 5, then circulate into the second chamber 6 through the plurality of gas circulation channels of the rectifying component, and are combed and smoother by the rectifying component to reduce the aerodynamic noise, then converge in the second chamber to avoid gas flow reduction, finally circulate from the second pneumatic connector 4 to the patient through the conduit connected with the patient.
  • the noise is reflected and/or refracted by the inner walls of the port oriented inward 32, the first chamber 5, the plurality of the gas circulation channels 21 and the second chamber 6, so as to be reduced effectively.
  • the port oriented inward 32 of the first pneumatic connector 3 is provided with a first opening 34 extended toward the first chamber 5, and the outer wall of the first opening 34 is provided with a plurality of first apertures 341.
  • the first opening end 342 of the first opening 34 is closed by a high surface density material such as high density plastic, metal or high density muffling sponge.
  • the first pneumatic connector 3 is communicated with the first chamber 5 through the plurality of the first apertures 341.
  • the number of the first apertures 341 may be set as needed. The more the number of the first apertures 341, the better the noise reduction effect.
  • the inner diameter of the first apertures 341 may also be set as needed.
  • the plurality of the first apertures 341 may have the same size and a uniform distribution.
  • the plurality of the first apertures 341 may also have different sizes.
  • the plurality of the first apertures 341 and first opening end 342 which is close can prevent high and low frequency noise generated by the blower from circulating directly to the patient through the tube body 1, so as to reduce the noise.
  • the end of the channel extended axially 22 which is open is provided with a limiting portion 221, and the first opening end 342 which is close abuts against the limiting portion 221, which can prevent the first pneumatic connector 3 from moving into the first chamber 5 under an external force.
  • the plurality of the gas circulation channels 21 are evenly distributed on the outer wall of the channel extended axially 22, and the inner diameter of the gas circulation channels is smaller than the inner diameter of the channel extended axially 22.
  • the number of the gas circulation channel 21 may be set as needed, the more the number of the gas circulation channel 21, the better the noise reduction effect.
  • the inner diameter of the gas circulation channels 21 may also be set as needed.
  • the plurality of gas circulation channels 21 may have the same size and a uniform distribution.
  • the plurality of gas circulation channels 21 may also have different sizes.
  • the gas pressurized by the blower circulate from the outlet conduit of the respiratory apparatus, then circulate into the first chamber 5 through the first pneumatic connector 3, and are buffered in the first chamber 5, then circulate into the second chamber 6 through the plurality of gas circulation channels 21 of the rectifying component 2, and are combed and smoother by the plurality of gas circulation channels 21 to reduce the aerodynamic noise.
  • other types of noise circulating through the rectifying component 2 is reflected and/or refracted by the inner walls of the plurality of gas circulation channels 21, so as to be reduced effectively.
  • the other end of the channel extended axially 22 which is close is provided with a second opening 25 extended outward.
  • the outer wall of the second opening 25 is provided with a plurality of second apertures 251, and the second opening 25 is communicated with the second chamber 6 through the plurality of second apertures 251; an end of the second opening 25 abuts against the inner wall of the second pneumatic connector 4, and the second opening 25 is communicated with the second pneumatic connector 4.
  • the number of the second apertures 251 may be set as needed, and the more the number of the second apertures 251, the better the noise reduction effect.
  • the inner diameter of the second apertures 251 may be set as needed.
  • the plurality of the second apertures 251 may have the same size and a uniform distribution.
  • the plurality of the second apertures 251 may have different sizes.
  • the gas pressurized by the blower and the noise generated by the blower circulate from the outlet conduit of the respiratory apparatus, then circulate into the first chamber 5 through the first pneumatic connector 3, and are buffered in the first chamber 5, then circulate into the second chamber 6 through the plurality of gas circulation channels 21 of the rectifying component 2, and are combed and smoother by the rectifying component 2 to reduce the aerodynamic noise, then circulate into the second opening 25 through the plurality of the second apertures 251, and converge in the second openning 25 to avoid gas flow reduction, finally circulate from the second pneumatic connector 4 to the patient through the conduit connected with the patient.
  • the noise is reflected and/or refracted by the inner walls of the second chamber 6, the second opening 25 and the plurality of apertures 251, so as to be further reduced.
  • the first opening end 342 which is close abuts against the limiting portion 221, and an end of the second opening 25 abuts against the inner wall of the second pneumatic connector 4, which makes the rectifying component 2 to be fixed in the tube body 1, so as to prevent the rectifying component 2 from moving inside the tube body 1 under an external force.
  • the noise reduction device can be disassembled, cleaned ang disinfected conveniently, and can be reusable, and has long service life, and does not need to replace internal parts.
  • a pneumatic path provided in the present application comprises the noise reduction device provided in the present application.
  • a respiratory system provided in the present application comprises the pneumatic path provided in the present application, and a respiratory apparatus; the respiratory apparatus supplies breathable gas pressurized by a blower included in the the respiratory apparatus.
  • the pneumatic path comprising the noise reduction device and the respiratory system comprising the pneumatic path can effectively reduce the noise circulating into the patient through the pneumatic path of the breathing.
  • the reference terms “one embodiment” , “some embodiments” , “example” , “specific example” , or “some examples” and the like means that, features, structures, materials or characteristics are combined and included in at least one embodiment or example of the application.
  • the schematic representation of the above terms is not necessarily directed to the same embodiment or example.
  • the features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.
  • the various embodiments or examples described in this specification can be joined and combined by those skilled in the art.

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  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Ventilation (AREA)

Abstract

Disclosed are a noise reduction device, a pneumatic path comprising the noise reduction device and a respiratory system comprising the pneumatic path. The noise reduction device comprises a tube body (1), a rectifying component (2), a first pneumatic connector (3) and a second pneumatic connector (4). One end of the tube body (1) is detachably connected with the first pneumatic connector (3), and the other end of the tube body (1) is detachably connected or fixed with the second pneumatic connector (4). The rectifying component (2) is disposed in the tube body (1), the rectifying component (2) divides the tube body (1) into a first chamber (5) and a second chamber (6); the rectifying component (2) comprises a plurality of gas circulation channels (21), the first chamber (5) is communicated with the second chamber (6) through the plurality of gas circulation channels (21). Through the noise reduction device, the noise generated by the blower during the high-speed operation can be effectively reduced while delivered to the patient by the pneumatic path of the respiratory system. Moreover, the noise reduction device can be disassembled, cleaned and disinfected conveniently, and can be reusable.

Description

Noise reduction device, pneumatic path comprising the noise reduction device and respiratory system comprising the same
Cross-reference to related applications
The present application claims the priority of the Chinese Patent Application No. 201821244148. X, field on Aug. 3, 2018, the entire disclosure of which is incorporated herein by reference.
Technical field
The present application relates to the field of medical devices, and in particular to a noise reduction device, a pneumatic path comprising the noise reduction device and a respiratory system comprising the same.
Background art
A respiratory system can replace, control or change a patient's normal physiological breathing. The respiratory system is often used to increase the patient's lung ventilation, so as to improve the patient's respiratory function, reduce respiratory power consumption, and save the patient's heart reserve. In the respiratory system, a respiratory apparatus is used to supply breathable gas. A blower is an important component of the respiratory apparatus which is used to pressurize gas. The pressurized gas is delivered to the patient through pneumatic path which is communicated with the patient.
In the existing market, in order to pursue small size of the respiratory system and carry the respiratory system conveniently, the gas pressurized by a high-speed blower is directly delivered to the patient through the pneumatic path of the respiratory system, or delivered to the patient after reducing niose by passing the gas pressurized by a high-speed blower through a simple muffler with a muffling cotton inside. While the gas pressurized by a high-speed blower is directly delivered to the patient through the pneumatic path of the respiratory system, the blower is directly communicated with the pneumatic path, strong noise is generated by the blower during the high-speed operation, and low-frequency noise is generated by the blower motor, both of the strong noise and the low-frequency noise are delivered to the patient through the pneumatic path of the respiratory system, so as to affect the therapeutic effect of the respiratory system on the patient, and affect the performance of the respiratory system.
While the gas pressurized by a high-speed blower is delivered to the patient after reducing niose by passing the gas through a simple muffler with a muffling cotton inside, the muffling cotton has poor noise reduction effect, most of the noise can pass or penetrate the muffling cotton, the noise can not be reduced completely. Moreover, the muffling cotton in the muffler connected with the  pneumatic path needs to be replaced frequently, or the entire muffler needs to be replaced, which causes great waste and pollution.
Summary
In order to solve the technical problems existing in the prior art, the present application provides a noise reduction device, a pneumatic path comprising the noise reduction device and a respiratory system comprising the same. The noise reduction device can be used for a long time without replacing internal parts. Through the noise reduction device, the noise generated by the blower during the high-speed operation can be effectively reduced while delivered to the patient by the pneumatic path of the respiratory system.
A noise reduction device, comprising: a tube body, a rectifying component, a first pneumatic connector and a second pneumatic connector;
one end of the tube body is detachably connected with the first pneumatic connector, and the other end of the tube body is detachably connected or fixed with the second pneumatic connector; the rectifying component is disposed in the tube body, the rectifying component divides the tube body into a first chamber and a second chamber, the rectifying component comprises a plurality of gas circulation channels, the first chamber is communicated with the second chamber through the plurality of gas circulation channels.
In one embodiment, the rectifying component comprises a channel extended axially, and two ends of the channel extended axially are respectively provided with a first component having the form of a cone and a second component having the form of a cone, the two ends of the channel extended axially are respectively closed by the first component having the form of a cone and the second component having the form of a cone.
In one embodiment, the rectifying component comprises a channel extended axially, one end of the channel extended axially is open, the other end of the channel extended axially is close.
In one embodiment, the first pneumatic connector comprises a port extended outward, another port oriented inward, and a bulge; the port extended outward is directly connected with outlet of the respiratory apparatus, or connected with the outlet of the respiratory apparatus through a conduit; the port oriented inward is located in the first chamber; the bulge abuts against the inner wall of the tube body.
In one embodiment, the port oriented inward is provided with a first opening extended toward the  first chamber, and the outer wall of the first opening is provided with a plurality of first apertures; the first opening end of the first opening is close; the first pneumatic connector is communicated with the first chamber through the first apertures.
In one embodiment, the end of the channel extended axially which is open is provided with a limiting portion, and the first opening end which is close abuts against the limiting portion.
In one embodiment, the plurality of the gas circulation channels are evenly distributed on the outer wall of the channel extended axially, and the inner diameter of the gas circulation channels is smaller than the inner diameter of the channel extended axially.
In one embodiment, the other end of the channel extended axially which is close is provided with a second opening extended outward, the outer wall of the second opening is provided with a plurality of second apertures, and the second opening is communicated with the second chamber through the second apertures;
an end of the second opening abuts against the inner wall of the second pneumatic connector, and the second opening is communicated with the second pneumatic connector.
A pneumatic path, comprising any of the above noise reduction devices.
A respiratory system, comprising any of the above pneumatic paths, and a respiratory apparatus, wherein the respiratory apparatus supplies breathable gas pressurized by a blower included in the the respiratory apparatus.
The present application provides a noise reduction device, a pneumatic path comprising the noise reduction device and a respiratory system comprising the same. The noise reduction device comprises a tube body, a rectifying component, a first pneumatic connector and a second pneumatic connector. The first pneumatic connector and the second pneumatic connector are respectively connected with the two ends of the tube body. The rectifying component is disposed in the tube body, the rectifying component divides the tube body into the first chamber and the second chamber. The rectifying component comprises a plurality of gas circulation channels, the first chamber is communicated with the second chamber through the plurality of gas circulation channels. The gas pressurized by the blower and the noise generated by the blower circulate from the outlet tube of the respiratory apparatus, then circulate into the first chamber through the first pneumatic connector, and are buffered in the first chamber, then circulate into the second chamber through the plurality of gas circulation channels of the rectifying component, and are combed and  smoother by the rectifying component to reduce the aerodynamic noise, then converge in the second chamber to avoid gas flow reduction, finally circulate from the second pneumatic connector to the patient through the conduit connected with the patient. In the above process, the noise is reflected and/or refracted by the inner walls of the first chamber, the plurality of gas circulation channels, and the second chamber, so as to be reduced effectively. Moreover, the noise reduction device can be disassembled, cleaned ang disinfected conveniently, and can be reusable, and has long service life, and does not need to replace internal parts.
Brief description of the drawings
These and other features, aspects, and advantages of the present application are described with reference to the drawings of certain embodiments, which are intended to schematically illustrate certain embodiments and not to limit the application.
Figure 1 is an schematic view of an example noise reduction device;
Figure 2 is an schematic view of another example noise reduction device;
Figure 3 is an schematic view of another example noise reduction device;
Figure 4 is an schematic view of another example noise reduction device;
description of the reference numerals:
tube body 1;
rectifying component 2, gas circulation channel 21, channel extended axially 22, first component having the form of a cone 23, second component having the form of a cone 24, limiting portion 221, second opening 25, second aperture 251;
first pneumatic connector 3, port extended outward 31, port oriented inward 32, bulge 33, first opening 34, first aperture 341, first opening end 342;
second pneumatic connector 4;
first chamber 5;
second chamber 6.
Detailed description of specific embodiments
The embodiments of the present application are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are exemplary and intended to  explain this application, and cannot be understood as a limitation on this application.
The present application provides a noise reduction device, the noise reduction device is applied to pneumatic path of the respiratory system. The first pneumatic connector 3 of the noise reduction device is connected with the conduit which is connected with the outlet of the respiratory apparatus, or the first pneumatic connector 3 of the noise reduction device is connected with the outlet of the respiratory apparatus, the second pneumatic connector 4 of the noise reduction device is connected with the conduit which is communicated with the patient. The noise reduction device comprises a tube body, a rectifying component, a first pneumatic connector and a second pneumatic connector. The first pneumatic connector and the second pneumatic connector are respectively connected with the two ends of the tube body. The rectifying component is disposed in the tube body, the rectifying component divides the tube body into the first chamber and the second chamber. The rectifying component comprises a plurality of gas circulation channels, the first chamber is communicated with the second chamber through the plurality of gas circulation channels. The gas pressurized by the blower and the noise generated by the blower circulate from the outlet conduit of the respiratory apparatus, then circulate into the first chamber through the first pneumatic connector, and are buffered in the first chamber, then circulate into the second chamber through the plurality of gas circulation channels of the rectifying component, and are combed and smoother by the rectifying component to reduce the aerodynamic noise, then converge in the second chamber to avoid gas flow reduction, finally circulate from the second pneumatic connector to the patient through the conduit connected with the patient. In the above process, the noise is reflected and/or refracted by the inner walls of the first chamber, the plurality of gas circulation channels, and the second chamber, so as to be reduced effectively. Moreover, the noise reduction device can be disassembled, cleaned ang disinfected conveniently, and can be reusable, and has long service life, and does not need to replace internal parts.
A noise reduction device provided by the present application is described in detail below with reference to the drawings.
As shown for example in Fig. 1, a noise reduction device, in accordance with the present applicaion, is applied to pneumatic path of the respiratory system. The noise reduction device comprises: a tube body 1, a rectifying component 2, a first pneumatic connector 3 and a second  pneumatic connector 4; one end of the tube body 1 is detachably connected with the first pneumatic connector 3, and the other end of the tube body 1 is detachably connected or fixed with the second pneumatic connector 4; the rectifying component 2 is disposed in the tube body 1, the rectifying component 2 divides the tube body 1 into a first chamber 5 and a second chamber 6, the rectifying component 2 comprises a plurality of gas circulation channels 21, the first chamber 5 is communicated with the second chamber 6 through the plurality of gas circulation channels 21. In the present embodiment, the tube body 1 has the form of a hollow cylinder, one end of the tube body 1 is detachably connected with the first pneumatic connector 3, and the other end of the tube body 1 is detachably connected or fixed with the second pneumatic connector 4; illustratively, the first pneumatic connector 3 is provided with a first bulge, the inner wall of the tube body 1 is provided with a first limiting portion, the first bulge of the first pneumatic connector 3 abuts against the first limiting portion of the inner wall of the tube body 1. In order to keep airtight, a sealing part may be placed in a groove which is provided on the first bulge. The sealing part may be made of an elastic material such as silicon. The second pneumatic connector 4 and the other end of the tube body 1 may be fabricated as one whole body. Or the second pneumatic connector 4 may be detachably connected with the other end of the tube body 1, detailedly, the second pneumatic connector 4 is provided with a second bulge, the inner wall of the tube body 1 is provided with a second limiting portion, the second bulge of the second pneumatic connector 4 abuts against the second limiting portion of the inner wall of the tube body 1. In order to keep airtight, a sealing part may be placed in a groove which is provided on the second bulge. The sealing part may be made of an elastic material such as silicon. The rectifying component is disposed in the tube body, the rectifying component divides the tube body into the first chamber and the second chamber. The rectifying component comprises a plurality of gas circulation channels, the first chamber is communicated with the second chamber through the plurality of gas circulation channels. The number of gas circulation channels 21 may be set as needed, and the more the number of gas circulation channels 21, the better the noise reduction effect. The inner diameter of the gas circulation channels 21 may also be set as needed. The plurality of gas circulation channels 21 may have the same size and a uniform distribution. The plurality of gas circulation channels 21 may also have different sizes. The first pneumatic connector 3 of the noise reduction device is connected with the conduit which is connected with the outlet of the  respiratory apparatus, or the first pneumatic connector 3 of the noise reduction device is connected with the outlet of the respiratory apparatus, the second pneumatic connector 4 of the noise reduction device is connected with the conduit which is communicated with the patient. The gas pressurized by the blower and the noise generated by the blower circulate from the outlet conduit of the respiratory apparatus, then circulate into the first chamber 5 through the first pneumatic connector 3, and are buffered in the first chamber 5, then circulate into the second chamber 6 through the plurality of gas circulation channels of the rectifying component, and are combed and smoother by the rectifying component to reduce the aerodynamic noise, then converge in the second chamber to avoid gas flow reduction, finally circulate from the second pneumatic connector 4 to the patient through the conduit connected with the patient. In the above process, the noise is reflected and/or refracted by the inner walls of the first chamber 5, the plurality of gas circulation channels 21, and the second chamber 6, so as to be reduced effectively.
As shown in Fig. 2, in some embodiments, the rectifying component 2 further comprises a channel extended axially 22, and two ends of the channel extended axially 22 are respectively provided with a first component having the form of a cone 23 and a second component having the form of a cone 24, the two ends of the channel extended axially are respectively closed by the first component having the form of a cone 23 and the second component having the form of a cone 24. Further, the plurality of the gas circulation channels 21 are evenly distributed on the outer wall of the channel extended axially 22. The noise generated by the blower is reflected and/or refracted by the outer walls of the first component having the form of a cone 23 and the second component having the form of a cone 24, so as to be reduced effectively, and is prevented from circulating directly through the channel extended axially 22 to the patient.
As shown in Fig. 3, in some embodiments, the rectifying component 2 comprises a channel extended axially 22, one end of the channel extended axially 22 is open, the other end of the channel extended axially 22 is close, which prevents the noise generated by the blower from circulating directly through the channel extended axially 22 to the patient. Further, the first pneumatic connector 3 comprises a port extended outward 31, another port oriented inward 32, and a bulge 33. The port extended outward 31 is directly connected with the outlet of the respiratory apparatus, or connected with the outlet of the respiratory apparatus through a conduit. The port oriented inward 32 is located in the first chamber 5. The bulge 33 abuts against  the inner wall of the tube body 1, which prevents the first pneumatic connector 3 from moving within the tube body 1. Alternatively, a sealing part may be placed in a groove which is provided on the bulge 33, which can ensure the airtightness of the joint between the first pneumatic connector 3 and the tube body 1, so as to prevent the gas from leaking out. The sealing part may be made of an elastic material such as rubber or silicon. The gas pressurized by the blower and the noise generated by the blower circulate from the outlet conduit of the respiratory apparatus, then circulate into the first chamber 5 through the first pneumatic connector 3, and are buffered in the first chamber 5, then circulate into the second chamber 6 through the plurality of gas circulation channels of the rectifying component, and are combed and smoother by the rectifying component to reduce the aerodynamic noise, then converge in the second chamber to avoid gas flow reduction, finally circulate from the second pneumatic connector 4 to the patient through the conduit connected with the patient. In the above process, the noise is reflected and/or refracted by the inner walls of the port oriented inward 32, the first chamber 5, the plurality of the gas circulation channels 21 and the second chamber 6, so as to be reduced effectively.
As shown in Fig. 4, in some embodiments, the port oriented inward 32 of the first pneumatic connector 3 is provided with a first opening 34 extended toward the first chamber 5, and the outer wall of the first opening 34 is provided with a plurality of first apertures 341. The first opening end 342 of the first opening 34 is closed by a high surface density material such as high density plastic, metal or high density muffling sponge. The first pneumatic connector 3 is communicated with the first chamber 5 through the plurality of the first apertures 341. The number of the first apertures 341 may be set as needed. The more the number of the first apertures 341, the better the noise reduction effect. The inner diameter of the first apertures 341 may also be set as needed. The plurality of the first apertures 341 may have the same size and a uniform distribution. The plurality of the first apertures 341 may also have different sizes. The plurality of the first apertures 341 and first opening end 342 which is close can prevent high and low frequency noise generated by the blower from circulating directly to the patient through the tube body 1, so as to reduce the noise.
The end of the channel extended axially 22 which is open is provided with a limiting portion 221, and the first opening end 342 which is close abuts against the limiting portion 221, which can prevent the first pneumatic connector 3 from moving into the first chamber 5 under an external  force.
The plurality of the gas circulation channels 21 are evenly distributed on the outer wall of the channel extended axially 22, and the inner diameter of the gas circulation channels is smaller than the inner diameter of the channel extended axially 22. The number of the gas circulation channel 21 may be set as needed, the more the number of the gas circulation channel 21, the better the noise reduction effect. The inner diameter of the gas circulation channels 21 may also be set as needed. The plurality of gas circulation channels 21 may have the same size and a uniform distribution. The plurality of gas circulation channels 21 may also have different sizes. The gas pressurized by the blower circulate from the outlet conduit of the respiratory apparatus, then circulate into the first chamber 5 through the first pneumatic connector 3, and are buffered in the first chamber 5, then circulate into the second chamber 6 through the plurality of gas circulation channels 21 of the rectifying component 2, and are combed and smoother by the plurality of gas circulation channels 21 to reduce the aerodynamic noise. In the above process, other types of noise circulating through the rectifying component 2 is reflected and/or refracted by the inner walls of the plurality of gas circulation channels 21, so as to be reduced effectively.
In one embodiment, the other end of the channel extended axially 22 which is close is provided with a second opening 25 extended outward. The outer wall of the second opening 25 is provided with a plurality of second apertures 251, and the second opening 25 is communicated with the second chamber 6 through the plurality of second apertures 251; an end of the second opening 25 abuts against the inner wall of the second pneumatic connector 4, and the second opening 25 is communicated with the second pneumatic connector 4. The number of the second apertures 251 may be set as needed, and the more the number of the second apertures 251, the better the noise reduction effect. The inner diameter of the second apertures 251 may be set as needed. The plurality of the second apertures 251 may have the same size and a uniform distribution. The plurality of the second apertures 251 may have different sizes. The gas pressurized by the blower and the noise generated by the blower circulate from the outlet conduit of the respiratory apparatus, then circulate into the first chamber 5 through the first pneumatic connector 3, and are buffered in the first chamber 5, then circulate into the second chamber 6 through the plurality of gas circulation channels 21 of the rectifying component 2, and are combed and smoother by the rectifying component 2 to reduce the aerodynamic noise, then circulate into the second opening 25  through the plurality of the second apertures 251, and converge in the second openning 25 to avoid gas flow reduction, finally circulate from the second pneumatic connector 4 to the patient through the conduit connected with the patient. In the above process, the noise is reflected and/or refracted by the inner walls of the second chamber 6, the second opening 25 and the plurality of apertures 251, so as to be further reduced. The first opening end 342 which is close abuts against the limiting portion 221, and an end of the second opening 25 abuts against the inner wall of the second pneumatic connector 4, which makes the rectifying component 2 to be fixed in the tube body 1, so as to prevent the rectifying component 2 from moving inside the tube body 1 under an external force. According to the above design, the noise reduction device can be disassembled, cleaned ang disinfected conveniently, and can be reusable, and has long service life, and does not need to replace internal parts.
A pneumatic path provided in the present application comprises the noise reduction device provided in the present application.
A respiratory system provided in the present application comprises the pneumatic path provided in the present application, and a respiratory apparatus; the respiratory apparatus supplies breathable gas pressurized by a blower included in the the respiratory apparatus..
The pneumatic path comprising the noise reduction device and the respiratory system comprising the pneumatic path can effectively reduce the noise circulating into the patient through the pneumatic path of the breathing.
In the description of the present specification, the reference terms "one embodiment" , "some embodiments" , "example" , "specific example" , or "some examples" and the like means that, features, structures, materials or characteristics are combined and included in at least one embodiment or example of the application. In the present specification, the schematic representation of the above terms is not necessarily directed to the same embodiment or example. And the features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples. Further, the various embodiments or examples described in this specification can be joined and combined by those skilled in the art.
Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are illustrative and are not to be construed as limiting the scope of the present application. The above-described embodiments can be varied,  modified, substituted and transformed by those skilled in the art within the scope of the present application.

Claims (10)

  1. A noise reduction device, applied to pneumatic path of the respiratory system, comprising: a tube body, a rectifying component, a first pneumatic connector and a second pneumatic connector; one end of the tube body is detachably connected with the first pneumatic connector, and the other end of the tube body is detachably connected or fixed with the second pneumatic connector; the rectifying component is disposed in the tube body, the rectifying component divides the tube body into a first chamber and a second chamber, the rectifying component comprises a plurality of gas circulation channels, the first chamber is communicated with the second chamber through the plurality of gas circulation channels.
  2. The noise reduction device according to claim 1, the rectifying component comprises a channel extended axially, and two ends of the channel extended axially are respectively provided with a first component having the form of a cone and a second component having the form of a cone, the two ends of the channel extended axially are respectively closed by the first component having the form of a cone and the second component having the form of a cone.
  3. The noise reduction device according to claim 1, the rectifying component comprises a channel extended axially, one end of the channel extended axially is open, the other end of the channel extended axially is close.
  4. The noise reduction device according to claim 3, the first pneumatic connector comprises a port extended outward, another port oriented inward, and a bulge;
    the port extended outward is directly connected with outlet of the respiratory apparatus, or connected with the outlet of the respiratory apparatus through a tube;
    the port oriented inward is located in the first chamber;
    the bulge abuts against the inner wall of the tube body.
  5. The noise reduction device according to claim 4, the port oriented inward is provided with a first opening extended toward the first chamber, and the outer wall of the first opening is provided with a plurality of first apertures;
    the first opening end of the first opening is close;
    the first pneumatic connector is communicated with the first chamber through the first apertures.
  6. The noise reduction device according to claim 5, the end of the channel extended axially which is open is provided with a limiting portion, and the first opening end which is close abuts against  the limiting portion.
  7. The noise reduction device according to claim 3, the plurality of the gas circulation channels are evenly distributed on the outer wall of the channel extended axially, and the inner diameter of the gas circulation channels is smaller than the inner diameter of the channel extended axially.
  8. The noise reduction device according to claim 3, the other end of the channel extended axially which is close is provided with a second opening extended outward, the outer wall of the second opening is provided with a plurality of second apertures, and the second opening is communicated with the second chamber through the second apertures;
    an end of the second opening abuts against the inner wall of the second pneumatic connector, and the second opening is communicated with the second pneumatic connector.
  9. A pneumatic path, comprising the noise reduction device according to any one of claims 1 to 8.
  10. A respiratory system, comprising the pneumatic paths according to claim 9, and a respiratory apparatus, wherein the respiratory apparatus supplies breathable gas pressurized by a blower included in the the respiratory apparatus.
PCT/CN2019/098244 2018-08-03 2019-07-29 Noise reduction device, pneumatic path comprising the noise reduction device and respiratory system comprising the same WO2020024914A1 (en)

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IT202200011255A1 (en) * 2022-05-27 2023-11-27 Universita’ Di Pisa IMPROVED VENTILATION DEVICE

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