Device for providing positive airway pressure

Abstract

A device for providing positive airway pressure for providing pressure therapy to treat respiratory-related diseases includes a device housing configured to surround and protect an internal component thereof from an external environment, and a noise reduction airway inside the device housing, the noise reduction airway having an inlet, an outlet, an inner wall, and an outer wall, and the gas inlet pipe is configured to receive external gas and allow pressurized gas to flow out. The interior of the noise-reducing airway also has a blower assembly configured to pressurize and output breathable gas entering the interior of the noise-reducing airway as a core constituent part of the device providing positive airway pressure. Specifically, the air blower assembly is composed of an impeller, a motor and an internal gas flow channel. The blower assembly also has an air inlet and an air outlet.

Description

Technical Field

[0001] The present invention is a device for providing positive airway pressure therapy to treat respiratory-related diseases, comprising a device housing, a noise-reducing airway, and a blower assembly located within the noise-reducing airway. Background Technology

[0002] People breathe through their nose and mouth, but during sleep, the airway can narrow for various reasons. Breathing through this narrowed passage produces snoring. When the narrowing is caused by the nose, it's called "nasal snoring," and when it's caused by the tongue or tonsils in the mouth, it's called "throat snoring." The main cause of nasal snoring is nasal congestion caused by colds and allergic rhinitis. When the nasal mucosa is inflamed and the nasal airway narrows, sound is produced. Some people have a deviated septum, meaning the bone in the middle of the nose is curved, which also causes snoring. On the other hand, the main cause of throat snoring is the tongue sliding down and blocking the airway during sleep. Enlarged tonsils or tonsillitis due to illness can also cause snoring. In most cases, nasal snoring can be cured by suppressing the inflammation causing the nasal congestion, and if necessary, a deviated septum can be corrected to cure snoring. However, throat snoring requires more attention. It can lead to sleep apnea, which is the repeated pause in breathing during sleep. Interventional treatment is generally required when this symptom occurs. In addition, some people snore with their mouths closed; these individuals may have sleep apnea and are at risk of serious illness. In summary, the causes of respiratory-related diseases are diverse, including physical condition, fatigue, and temporary factors such as sudden physical illnesses can also narrow the airway. However, in most cases, once the underlying problem is addressed, the symptoms related to respiratory diseases will stop. Results from trials and data analysis indicate that for most adults, including the elderly, airway treatment, compared to no treatment, can reduce the risk of respiratory events during sleep, reduce daytime sleepiness, lower the risk of motor vehicle accidents, and improve systemic blood pressure, gastroesophageal reflux symptoms, glycemic control in diabetic patients, and quality of life.

[0003] Therefore, by providing a stable airflow to the airway, keeping it clear, and preventing muscle relaxation during inhalation that could lead to the collapse of soft tissues in the pharynx and obstruction of the airway during supine sleeping, this method can not only improve snoring but also reduce the health risks associated with obstructive sleep apnea. Stress therapy for breathing-related symptoms can not only improve sleep quality but also reduce the risk of cardiovascular disease, daytime fatigue, and other health problems. Recognizing and adopting effective stress therapy is of great and urgent importance for improving breathing-related problems and enhancing overall quality of life. Summary of the Invention

[0004] The objective of this invention is to provide a novel positive airway pressure (POP) device. By optimizing its structure and the interaction of its components, the POP device achieves superior performance compared to existing devices, facilitating its manufacturing and rapid market adaptation. The POP device of this invention utilizes an effective structure to reduce noise within a minimally sized space and overcomes the limitations of existing products. This provides a more effective and widely applicable solution for treating sleep apnea by delivering continuous positive airflow to the patient's airway in a safer manner.

[0005] A device for providing positive airway pressure for pressurizing breathable gas and delivering it into a patient's airway for the treatment of respiratory-related diseases, the device comprising:

[0006] The device housing is configured to enclose the internal components;

[0007] The noise reduction airway has an inlet, an outlet, an inner wall, and an outer wall, wherein the central axis of the inlet and the central axis of the outlet of the noise reduction airway form an angle.

[0008] The blower assembly has an air inlet and an air outlet, wherein the central axes of the air inlet and the air outlet are perpendicular to each other, so that breathable gas enters from the air inlet of the blower assembly and flows tangentially along the impeller rotation direction to the air outlet of the blower assembly.

[0009] The blower assembly includes a blower housing, an impeller, a motor, and an internal gas flow passage thereof, wherein the internal gas flow passage of the blower assembly is at least partially located below the impeller;

[0010] The volume ratio of the blower assembly to the noise reduction air duct ranges from 3 to 18, and when the blower assembly is fixed to the noise reduction air duct, the distance between it and the inner wall of the noise reduction air duct is greater than or equal to 3 mm.

[0011] In one embodiment, from a top-down view, the air inlet of the blower assembly is located approximately at the center of the noise reduction air duct in which it is located.

[0012] In one embodiment, the noise-reducing airway has a first chamber, a second chamber, and a wall separating the first chamber and the second chamber, the wall having an opening.

[0013] In one embodiment, the inlet and outlet of the noise-reducing airway are not on the same horizontal plane.

[0014] In one embodiment, the opening area of ​​the noise reduction air duct outlet is 0.7-1.5 times the air outlet area of ​​the blower assembly.

[0015] In one embodiment, the device for providing positive airway pressure further includes a bracket, through which the blower assembly is fixed within the noise-reducing airway.

[0016] The present invention also discloses a device for providing positive airway pressure, used to pressurize breathable gas and deliver it into a patient's airway for the treatment of respiratory-related diseases. The device for providing positive airway pressure includes:

[0017] The device housing is configured to enclose the internal components;

[0018] The noise-reducing airway has an inlet, an outlet, an inner wall, and an outer wall, and is configured to pressurize the breathable gas entering the noise-reducing airway;

[0019] The blower assembly has an air inlet and an air outlet, and is configured to pressurize the gas entering the noise reduction air duct;

[0020] The blower assembly includes a blower housing, an impeller, a motor, and an internal gas flow passage thereof, wherein the internal gas flow passage of the blower assembly is at least partially located below the impeller;

[0021] The device for providing positive pressure in the airway also includes a bracket. The blower assembly is fixed to the approximate center position of the noise reduction airway in the vertical direction by the bracket, so that the air inlet of the blower assembly and the inlet of the noise reduction airway are not concentric, while the air outlet of the blower assembly and the outlet of the noise reduction airway are concentric.

[0022] The height of the noise reduction air duct differs from the height of the blower assembly by at least 5mm.

[0023] In one embodiment, the blower assembly is placed within the noise-reducing airway such that the axis of the breathable gas from the blower assembly inlet is parallel to the horizontal plane.

[0024] In one embodiment, an outlet pipe is provided at the outlet of the noise-reducing airway.

[0025] In one embodiment, the air outlet of the blower assembly is sealed to the outlet of the noise reduction air duct via an elastomer.

[0026] In one embodiment, the support has at least two different wall thicknesses.

[0027] In one embodiment, the contact area between the bracket and the blower assembly is at least 220 mm². 2 .

[0028] In one embodiment, the support is at least partially in contact with the wall of the noise-reducing airway.

[0029] The present invention also discloses a device for providing positive airway pressure, used to pressurize breathable gas and deliver it into a patient's airway for the treatment of respiratory-related diseases. The device for providing positive airway pressure includes:

[0030] The device housing is configured to enclose the internal components;

[0031] The noise-reducing airway has an inlet, an outlet, an inner wall, and an outer wall, and is configured to pressurize the gas entering the noise-reducing airway.

[0032] The blower assembly, housed within a noise-reducing air duct, has an air inlet and an air outlet. The air outlet of the blower assembly is sealed to the outlet of the noise-reducing air duct via an elastomer.

[0033] The blower assembly includes a blower housing, an impeller, a motor, and an internal gas flow passage thereof, wherein the internal gas flow passage of the blower assembly is at least partially located below the impeller;

[0034] The impeller is a closed impeller.

[0035] The impeller has a central opening, and the air inlet of the blower assembly is greater than or equal to the central opening of the impeller.

[0036] In one embodiment, the blower assembly is placed within the noise-reducing air duct such that the axis of the breathable gas from the blower assembly inlet is perpendicular to the horizontal plane.

[0037] In one embodiment, the inlet and outlet of the noise-reducing airway are not on the same horizontal plane.

[0038] In one embodiment, the wall of the noise-reducing airway is made of one of polypropylene (PP), polycarbonate (PC), polyethylene terephthalate-1,4-cyclohexanediol (PCTG), polyamide (PA), and polyetheretherketone (PEEK).

[0039] The present invention also discloses a device for providing positive airway pressure, used to pressurize breathable gas and deliver it into a patient's airway for the treatment of respiratory-related diseases. The device for providing positive airway pressure includes:

[0040] The device housing is configured to enclose the internal components;

[0041] The noise-reducing airway has an inlet, an outlet, an inner wall, and an outer wall, and is configured to pressurize the gas entering the noise-reducing airway.

[0042] The blower assembly has an air inlet and an air outlet. The blower assembly is fixed inside the noise reduction air duct, such that the air inlet of the blower assembly and the inlet of the noise reduction air duct are not concentric, while the air outlet of the blower assembly and the outlet of the noise reduction air duct are concentric.

[0043] The blower assembly includes a blower housing, an impeller, a motor, and an internal gas flow passage, the internal gas flow passage of the blower assembly being at least partially located below the impeller;

[0044] The impeller is a closed impeller;

[0045] Breathable gas enters from the blower assembly inlet and flows tangentially along the impeller rotation direction to the blower assembly outlet.

[0046] In one embodiment, the noise-reducing airway has a first chamber, a second chamber, and a wall separating the first chamber and the second chamber, the wall having an opening.

[0047] In one embodiment, the axis of the noise reduction air duct inlet is parallel or perpendicular to the axis of the blower assembly air inlet.

[0048] In one embodiment, the air outlet of the blower assembly is sealed to the outlet of the noise reduction air duct via an elastomer.

[0049] In one embodiment, the impeller has a central opening, and the air inlet of the blower assembly is greater than or equal to the central opening of the impeller.

[0050] The device for providing positive airway pressure according to the present invention has at least the following beneficial effects:

[0051] 1) Utilizing scientific theories and experimental data, the internal structure of the device providing positive air pressure and the placement of its components (such as the blower assembly) were innovated and optimized, resulting in a more efficient and noise-reducing structural form. ① During the development and design of the internal noise-reducing air duct, the influence of the ratio between the blower assembly and the noise-reducing air duct on the device's noise level was thoroughly investigated. It was found that the ratio affects the noise level of the device. Through data review and careful study and comparison of various volumes of the blower assembly and noise-reducing air duct with different ratios, and testing in a soundproof room meeting standard noise levels, the accuracy and reliability of the test results were ensured. It was concluded that a volume ratio of 3-18 between the blower assembly and the noise-reducing air duct has a more significant noise reduction effect. Through scientific and accurate theoretical data, the volumes of the noise-reducing air duct and the blower assembly were more precisely specified, enabling the noise-reducing air duct of this invention to achieve a superior noise reduction effect. In today's society, patients have increasingly higher requirements for the quiet performance of devices providing positive airway pressure. This invention offers an innovative solution to meet this need: by standardizing data, it provides a safe and effective noise reduction method, offering patients a more effective way to reduce noise, aligning with the growing expectations and demands of patients for quiet treatment devices. ② Placing the blower assembly in a roughly centered position within the noise-reducing airway helps provide a more uniform airflow path and extends the airflow trajectory. The blower assembly is positioned roughly centered within the noise-reducing airway chamber from a top-down perspective, ensuring that the air inlet of the blower assembly is also roughly centered. This allows for uniform airflow from all sides when the air enters the blower from the chamber, avoiding excessively large or small local airflows, thereby reducing differences in airflow velocity and improving airflow stability and uniformity. This method also effectively disperses and balances the airflow before it enters the blower assembly, reducing the possibility of airflow vibration and further reducing turbulence and noise caused by airflow bending and twisting. Positioning the blower assembly vertically centered within the noise-reducing airway reduces the distance difference between the blower assembly and the inner wall of the airway, helping to reduce corresponding airflow resistance and pressure fluctuations, thereby improving the efficiency and stability of the noise-reducing airway. The vertically centered position of the blower assembly also helps to lengthen the airflow path, providing a vertical flow path in addition to the horizontal one. This increased flow path promotes more uniform and stable airflow, thus reducing noise. ③ Setting the outlet and inlet of the noise-reducing airway on two different, perpendicular planes reduces the possibility of noise superposition. When airflow enters the noise-reducing airway from the inlet, due to fluid characteristics and velocity distribution, the inlet is often the main source of airflow noise. Therefore, setting the inlet and outlet perpendicular to each other helps to separate these two key areas, reducing noise by moving the larger noise source away from the patient.④ Using a quieter centrifugal blower is a highly effective way to reduce device noise. Since the blower assembly is actually the primary source of noise, using a quieter blower fundamentally reduces the actual noise level of the device compared to employing more noise-reducing structures or foam materials. This method is not only more effective but also more convenient, significantly improving the device's noise performance and enhancing user comfort and experience. The centrifugal blower assembly used in this invention not only has lower noise levels than axial blower assemblies but also higher efficiency. After determining the blower assembly type, the noise-reducing air duct of this invention is designed according to the selected blower assembly type, ensuring that the noise-reducing air duct works in conjunction with the blower assembly to achieve the best noise reduction effect under this configuration.

[0052] 2) Lowering the internal gas flow channel of the blower assembly offers several advantages in terms of noise and usability compared to existing blower assemblies. ① Lowering the internal gas flow channel to the center of the blower assembly allows the airflow entering the assembly to pass through the motor, thus carrying away the heat generated by the motor's operation. This helps dissipate heat from the motor and maintains it within a suitable temperature range, preventing overheating from prolonged use and improving motor efficiency and lifespan, thereby increasing the efficiency and lifespan of the blower assembly. ② Existing blower assemblies have the gas flow channel designed at the impeller. This design causes the airflow, immediately pressurized by the impeller, to enter the gas flow channel and be output. The sudden and rapid change in airflow at the impeller and gas flow channel can lead to turbulence or irregular flow, increasing the noise of the blower assembly. Furthermore, this sudden change can cause airflow oscillations, further exacerbating the noise problem. In contrast, lowering the gas flow channel to the near-central position of the blower assembly provides a buffer space for the newly pressurized airflow, allowing it to flow more smoothly and evenly along the gas flow channel path. This reduces turbulence and irregular flow within the blower assembly, thus reducing noise. ③ When a blower assembly uses a closed impeller, unlike a non-closed impeller, its blades are enclosed in a sealed casing. The impeller has a central opening, through which airflow enters and exits at higher pressure from the relatively enclosed structure, passing through the impeller flow channel formed by the blades. Non-closed impellers, on the other hand, have a more open structure, allowing airflow to flow freely on both sides of the impeller without much path restriction. Therefore, blower assemblies using closed impellers require a lowered gas flow channel to provide more space for the integration and guidance of the pressurized airflow, improving the performance and efficiency of the blower assembly. ④ Designing the gas flow channel at the center of the blower assembly also benefits the stability of the blower assembly within the noise-reducing air duct. In existing market blower assemblies, the internal gas flow channel is located at the top, while this invention moves it downwards, meaning the overall center of gravity of the blower assembly also shifts downwards, moving closer to the center of the blower assembly. This reduces mechanical vibration caused by changes in airflow pressure and velocity, further improving the blower's operational stability and safety. It also helps the support frame to more stably and securely fix the blower assembly within the noise-reducing air duct, reducing some motor noise. ⑤ This invention primarily uses a centrifugal blower assembly placed upside down within the noise-reducing air duct, changing the direction and speed of airflow. This reduces eddies and vortices generated during airflow by positioning the blower assembly's impeller in a specific direction. Combined with the special chamber structure of this invention, the sound from the blower assembly's outlet is contained, thus reducing noise generation.This invention reduces noise by calculating the overall volume of the blower assembly and the volume of the noise-reducing air duct chamber, and by designing the gas flow channel and internal components (such as supports), converting acoustic energy into kinetic energy. The gas flow channel is designed to enclose the blower assembly at its center, with corresponding chambers at the blower assembly's air inlet to utilize the gas or components within these chambers to reduce noise. Further coordination between the gas flow channel and the noise-reducing air duct creates a height difference in the airflow path, increasing the airflow path while ensuring sufficient flow rate. Furthermore, the rational and smooth design at the connections between the components and chambers reduces turbulence, making the noise flow path smoother.

[0053] 3) Compared to existing suspension systems on the market, the bracket of this invention provides greater stability to the blower assembly while aiding in noise reduction. A portion of the bracket is designed to connect to the bottom wall of the chamber containing the blower, and elastic elements are incorporated at its top and at the air outlet of the blower assembly, forming part of the overall bracket structure. This method fixes the blower assembly at several fixed points around it, firmly securing it within one of the chambers of the noise-reducing air duct. Compared to existing suspension systems, this method provides greater stability and significantly reduces the risk of damage to the blower assembly due to vibration or external impact. Furthermore, the bracket of this invention surrounds the air inlet and outlet of the blower assembly, providing both support and sealing to prevent air leakage. Attached Figure Description

[0054] Figure 1 This is a three-dimensional schematic diagram of a device for providing positive airway pressure according to one embodiment of the present invention;

[0055] Figure 2 An exploded view of the structure of a device for providing positive airway pressure according to one embodiment of the present invention;

[0056] Figure 3 This is a three-dimensional schematic diagram of a noise-reducing airway in a device for providing positive airway pressure according to one embodiment of the present invention.

[0057] Figure 4 This is a cross-sectional view of a noise-reducing airway in a device for providing positive airway pressure according to one embodiment of the present invention.

[0058] Figure 5 This is a three-dimensional schematic diagram of a blower assembly in a device for providing positive airway pressure according to one embodiment of the present invention.

[0059] Figure 6 This is an exploded view of the blower assembly in a device for providing positive air pressure according to one embodiment of the present invention.

[0060] Figure 7 This is a schematic diagram of an airflow flowing out along the tangential direction of the impeller rotation in a blower assembly, as described in Embodiment 1 of the present invention.

[0061] Figure 8 This is a schematic diagram of the internal gas flow channel of a blower assembly according to one embodiment of the present invention;

[0062] Figure 9 This is a schematic diagram showing that the central axes of the noise-reducing airway inlet and outlet are perpendicular to each other in one form of the device for providing positive airway pressure according to Embodiment 1 of the present invention.

[0063] Figure 10 This is a schematic diagram showing that the central axes of the air inlet and outlet of the blower assembly are perpendicular to each other in one form of the device for providing positive air pressure in Embodiment 1 of the present invention.

[0064] Figure 11 This is a schematic diagram showing that the air inlet of the blower assembly of a device for providing positive airway pressure in a top view, as described in Embodiment 1 of the present invention, is located approximately at the center of the chamber of the noise reduction airway in which it is located.

[0065] Figure 12 This is a schematic diagram of the blower assembly of a device for providing positive airway pressure in one embodiment of the present invention, located approximately at the center of the noise-reducing airway in the vertical direction.

[0066] Figure 13 This is a schematic diagram showing that the inlet and outlet of the noise-reducing airway of a device for providing positive airway pressure in one embodiment of the present invention are not on the same horizontal plane.

[0067] Figure 14 This is a schematic diagram comparing the noise reduction airway outlet area and the blower outlet area of ​​a device for providing positive airway pressure in one embodiment of the present invention.

[0068] Figure 15 This is a schematic diagram showing the positions of the noise reduction airway inlet and outlet and the air inlet and outlet of the blower assembly of a device for providing positive airway pressure in one embodiment of the present invention.

[0069] Figure 16 This is a schematic diagram showing the distance between the noise-reducing air duct and the blower assembly in the vertical direction of a noise-reducing air duct positive pressure device according to Embodiment 1 of the present invention.

[0070] Figure 17 This is a schematic diagram showing the distance between the blower assembly and the inner wall of the noise-reducing airway in the device for providing positive airway pressure in Embodiment 1 of the present invention.

[0071] Figure 18This is a schematic diagram showing the size of the air inlet and the central opening of the impeller of a blower assembly of a device for providing positive air pressure in one embodiment of the present invention.

[0072] Figure 19 This is a schematic diagram showing that the axis of the noise reduction airway inlet of a device for providing positive airway pressure in one embodiment of the present invention is perpendicular to the axis of the blower assembly air inlet.

[0073] Figure 20 This is a schematic diagram showing that the axis of the noise reduction airway inlet of a device for providing positive airway pressure in one embodiment of the present invention is parallel to the axis of the air inlet of the blower assembly.

[0074] Figure 21 A schematic diagram of a support and transition component for sealing and supporting a device for providing positive airway pressure, as shown in another embodiment of the present invention.

[0075] Figure 22 A three-dimensional schematic diagram of a device for providing positive airway pressure according to another embodiment of the present invention;

[0076] Figure 23 This is a three-dimensional schematic diagram of the device housing containing a sponge in the device for providing positive airway pressure according to Embodiment 1 of the present invention. Detailed Implementation

[0077] To facilitate understanding of the invention, a more complete description will be given below with reference to the accompanying drawings. Typical embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of the invention more thorough and complete.

[0078] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the invention pertains. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0079] Compared to existing positive airway pressure (POP) devices on the market, this invention features refined and scientific testing and processing of the internal structure and the inter-component coordination, maximizing the advantages of each component structure. This improves the overall performance and efficiency of the POP device, resulting in superior performance in noise reduction, efficiency, reliability, and lifespan. Therefore, this invention not only enhances the performance of POP devices but also provides patients with a more stable, safe, and comfortable user experience, demonstrating a clear competitive advantage and representing a superior technological invention for patients, manufacturers, and the market.

[0080] The following examples illustrate several structures of the device for providing positive airway pressure for the treatment of respiratory-related diseases by pressurizing breathable gas and delivering it into the patient's airway.

[0081] Basic, approximately, roughly: In some forms of this technology, the terms basic, approximately, roughly indicate that the original value fluctuates within 15 percent.

[0082] Air: In some forms of this technology, air may be considered as the air used for breathing in daily life, and in other forms of this technology, air may be considered as other gases or combinations of gases that can be used for breathing, such as an atmosphere rich in oxygen.

[0083] Environment: In some forms of this technology, the environment may be considered to be the exterior of the noise-reducing airway housing that does not surround the blower assembly, and in other forms of this technology, the environment is considered to be the surroundings of the patient's location.

[0084] Example 1

[0085] This embodiment provides a device 1 for providing positive airway pressure. This embodiment provides a three-dimensional structural schematic diagram, exploded view, cross-sectional view, airflow path diagram, component location diagram, and various data diagrams for the device 1 for providing positive airway pressure, as shown in the following figures. Figure 1-19 This embodiment relates to a device 1 for providing positive airway pressure, used to pressurize breathable gas and deliver it into a patient's airway for the treatment of respiratory-related diseases. The device 1 for providing positive airway pressure includes a device housing 2, a noise-reducing airway 3 located within the device housing 2 and having an inlet 31 and an outlet 32, and a blower assembly 4 including a blower housing, an impeller 43, a motor 44 and an internal gas flow channel 45. The blower assembly 4 is located within the noise-reducing airway 3 and configured to pressurize the breathable gas entering the noise-reducing airway 3 and then output it, ultimately delivering it to the patient's airway through the outlet 32 ​​of the noise-reducing airway and connecting to the outlet of the device housing 2 for treatment.

[0086] Specifically, the device housing 2 is configured to enclose the internal components, which are all components within the housing 2, including the noise-reducing airway 3, the blower assembly 4, etc. In some cases, the noise-reducing airway 3 has an outlet pipe at its outlet. The housing 2 can have various shapes, such as spherical, square, roughly conical, or any other shape. The housing 2 has a housing 2 outlet and a housing 2 inlet. The housing 2 outlet is configured to connect to a breathing hose, generally in the form of an opening, while the housing 2 inlet is configured to communicate with the inlet 31 of the noise-reducing airway 3 inside it. This communication means a direct or indirect connection to the inlet 31 of the noise-reducing airway 3. The housing 2 inlet is configured to draw in outside air and deliver it into the noise-reducing airway 3 through inlet 31 to pressurize the blower assembly 4. Furthermore, the housing 2 has a robust structural design, effectively protecting the sensitive electronic components and other critical parts from external impacts. It is made of high-strength, wear-resistant materials, such as plastic, metal, or other composite materials. In some cases, the housing 2 of the device 1, which provides positive air pressure, also has fireproof, dustproof, and heat dissipation features.

[0087] The noise-reducing airway 3 is configured to pressurize and reduce noise in the airflow entering it, and has an inlet 31, an outlet 32, an inner wall, and an outer wall. The inlet 31 of the noise-reducing airway 3 is connected to the inlet of the device housing 2. Without affecting the airflow rate, the inlet 31 can be one or more openings, and its shape can be circular, square, elliptical, or any other shape. The outlet 32 ​​of the noise-reducing airway 3 is configured to connect to the outlet 42 of the blower assembly 4, i.e., by directly or indirectly connecting to the blower assembly 4, to deliver the pressurized breathable gas from the blower assembly 4 to the outside of the noise-reducing airway 3. In one embodiment, a transition component connects the blower assembly outlet 42 and the noise-reducing airway outlet 32 ​​and prevents leakage. Inlet 31 and outlet 32 ​​are typically not located on the same wall of the noise-reducing airway 3. This separation helps isolate noise at the inlet 31 and outlet 32, preventing noise from accumulating and generating greater noise. In one case, the inlet 31 and outlet 32 ​​of the noise-reducing airway 3 are not on the same horizontal plane. This arrangement not only increases the distance between the inlet 31 and outlet 32 ​​horizontally but also vertically, further isolating noise at the inlet 31 and outlet 32. This method creates an angle between the central axis of the inlet 31 and the central axis of the outlet 32, where the angle can be understood as the two central axes intersecting when projected onto any two-dimensional plane. Furthermore, in some cases, the noise-reducing airway outlet 32 ​​has an outlet pipe, wherein the outlet pipe has at least one section of a straight, non-tapered cylindrical shape. The outlet pipe serves two specific purposes. First, it provides a wall of a certain length at the outlet 32, facilitating the connection between the outlet 32 ​​of the noise-reducing air duct 3 and the air outlet 42 of the blower assembly 4, as well as guiding the airflow from the blower assembly 4. It also facilitates the connection between the outlet 32 ​​of the noise-reducing air duct 3 and the outlet of the device housing 2. Second, the length of the outlet pipe helps to regulate the pressurized airflow from the blower assembly 4 to reduce noise, allowing the airflow to diffuse and stabilize sufficiently within the pipe. This process helps reduce turbulence and pressure fluctuations in the airflow. Furthermore, designing the outlet pipe as a straight, non-tapered cylinder for at least one section helps prevent sudden pressure changes that could increase noise. In addition, the housing of the noise-reducing air duct 3 has excellent sealing properties, encompassing the sealing between its various components and the sealing between the device housing 2 and the noise-reducing air duct 3.Good sealing performance helps prevent external dust, moisture, or other harmful substances from entering the noise-reducing airway 3 and affecting airflow. This sealing can be achieved through a direct mechanical connection, a seal formed by an elastomer 51, or through adhesives such as glue or tape, or any other form of sealing connection. In one case, the device housing 2 and the noise-reducing airway 3 are sealed together; however, the seal may be incomplete. Furthermore, the wall of the noise-reducing airway 3 is made of one of the following: polypropylene (PP), polycarbonate (PC), polyethylene terephthalate-1,4-cyclohexanediol (PCTG), polyamide (PA), or polyetheretherketone (PEEK).

[0088] The pressurization effect of the noise reduction air duct 3 is mainly generated by its internal blower assembly 4. As the core component of the device 1 that provides positive pressure to the air duct, the blower assembly 4 has an air inlet 41 and an air outlet 42, configured to pressurize the gas entering the noise reduction air duct 3. The central axes of the air inlet 41 and the air outlet 42 of the blower assembly 4 are perpendicular to each other, so that the gas enters from the air inlet 41 of the blower assembly 4 and flows tangentially along the rotation direction of the impeller 43 to the air outlet of the blower assembly 4. The blower assembly 4 includes a blower housing, an impeller 43, a motor 44, and an internal gas flow channel 45. The internal gas flow channel 45 is at least partially located below the impeller 43, and is configured to extend to approximately the center of the blower assembly 4. This approximately center can be understood as the plane containing the farthest point of the channel near the impeller 43 within the channel where the blower assembly 44's outlet 42 is located, which is considered the bottom plane of the gas flow channel 45. The distance between this bottom plane and the bottom plane of the impeller 43 near the motor 44 is greater than or equal to 10 mm (e.g., ...). Figure 8As shown, d5≥10mm) helps to reduce noise and dissipate heat in the blower assembly 4. The impeller 43 of the blower assembly 4 can have various forms, such as a forward impeller, a backward impeller, a closed impeller, or a radial impeller. In one case, the impeller is a closed impeller, that is, it has multiple blades located between the first and second thin plates, where the first thin plate is located on the side away from the motor 44. The impeller 43 has a central opening that extends upward toward the air inlet 41 of the blower assembly 4 and forms an arc connection with the bottom plane of the first thin plate. The second thin plate is a planar shape with a central opening. Using this type of impeller 43 in combination with the downward form of the gas flow channel further improves the performance of the blower. The motor 44, which is adjacent to the impeller 43, is the core power source of the entire device 1 that provides positive airway pressure. It usually uses DC or AC current technology, which has efficient, stable and reliable performance to provide a continuous and stable power supply to the patient. The blower assembly 4 also includes a blower housing, within which the blower is typically enclosed. The housing provides sufficient protection for the internal components of the blower assembly 4 while effectively isolating electromagnetic interference and noise from the motor 44. The blower housing generally consists of two parts, but some are integral. The blower housing has an opening near the impeller 43 forming the air inlet 41 of the entire blower assembly 4, and an outlet 42 at its edge, which may be composed of one or both parts. The specific process of airflow pressurization through the blower assembly 4 is as follows: the airflow first enters the blower assembly 4 through the air inlet 41, then immediately pressurizes as the impeller 43 rotates, subsequently entering the internal gas flow channel 45 of the blower assembly 4, and finally exiting from the outlet 42 of the blower assembly 4 in the tangential direction of the impeller 43's rotation. Therefore, in order for the airflow to smoothly pass through the air inlet 41 and enter the blower assembly 4, the air inlet 41 of the blower assembly 4 must be greater than or equal to the center opening of the impeller 43 (e.g., Figure 18As shown), the airflow enters the blower assembly 4, adheres to the impeller 43, and rotates with the impeller 43. In one case, the gas enters from the inlet 41 of the blower assembly 4 and flows tangentially along the rotation direction of the impeller 43 to the outlet 42 of the blower assembly. In this case, the blower assembly located inside the noise-reducing air duct 3 is an axial-flow blower assembly. As described above, the outlet 42 of the blower assembly 4 is configured to communicate with the outlet 32 ​​of the noise-reducing air duct 3. To ensure a sufficient flow of pressurized breathable gas smoothly exits the gas flow channel 45 inside the blower assembly 4, the opening area of ​​the outlet 32 ​​of the noise-reducing air duct 3 connected to the outlet 42 of the blower assembly 4 is 0.7-1.5 times, preferably 0.85-1.1 times, the area of ​​the blower outlet 42. In one configuration, the outlet 42 of the blower assembly 4 and the outlet 32 ​​of the noise-reducing air duct 3 are sealed together by an elastomer 51. This ensures that the airflow is transmitted in a sealed manner from the moment it enters the blower assembly 4 until it exits from the outlet 42, reducing the possibility of leakage. In another configuration, a transition component connects the outlet 42 of the blower assembly 4 and the outlet 32 ​​of the noise-reducing air duct 3, preventing leakage. In yet another configuration, the inlet 41 of the blower assembly and the inlet 31 of the noise-reducing air duct 3 are not concentric, while the outlet 42 of the blower assembly 4 and the outlet 32 ​​of the noise-reducing air duct 3 are concentric.

[0089] To achieve better noise reduction, this invention sets a series of requirements for the placement and size of the blower assembly 4 within the noise-reducing air duct 3. Firstly, theoretically, a larger internal volume of the noise-reducing air duct 3 generally results in less resistance to gas flow, reducing the probability of turbulence. However, excessively large internal volumes create more dead space, hindering effective gas circulation and thus reducing gas velocity and increasing noise. After numerous tests of various volume ratios between the noise-reducing air duct 3 and the blower assembly, it was concluded that the volume ratio of the blower assembly 4 to the noise-reducing air duct 3 should range from 3 to 18, with 4 to 7 times being the preferred ratio for better noise reduction. Furthermore, to ensure effective and smooth gas entry into the blower assembly 4, the distance between the blower assembly 4 and the inner wall of the noise-reducing air duct 3 when fixed in place must be greater than or equal to 3 mm (e.g., ...). Figure 16 d3≥3mm Figure 17(d4≥3mm). Secondly, the noise reduction air duct 3 typically has two chambers, namely, a first chamber 34, a second chamber 35, and a wall separating the first chamber 34 and the second chamber 35. The wall has an opening 33 configured to communicate with the air inlet 41 of the blower assembly 4. In this manner, the blower assembly 4 is fixed in one of the chambers. In one case, the blower assembly 4 is located in the first chamber 34, where the pressure in the first chamber 34 is greater than the pressure in the second chamber 53. In this embodiment, the blower assembly 4 is placed upside down inside the noise reduction air duct 3. At this time, the blower assembly 4 is placed inside the noise reduction air duct 3 such that the direction in which the breathable gas enters from the air inlet 41 of the blower assembly 4 is vertical. At this time, the height of the noise reduction air duct 3 differs from the height of the blower assembly 4 by at least 5mm. When the direction in which the breathable gas enters from the air inlet 41 of the blower assembly 4 is vertical or horizontal, the axis of the noise reduction air duct inlet 31 is parallel or perpendicular to the axis of the air inlet 41 of the blower assembly 4. In one configuration, the blower assembly 4 is positioned approximately at the center of the noise-reducing air duct 3. This centering can be achieved in two ways: from a top-down perspective (i.e., at a 90-degree angle between the observer's line of sight and the ground or horizontal plane), the blower assembly's air inlet 41 is located approximately at the center of the chamber within the noise-reducing air duct 3. The device 1 providing positive pressure to the air duct also includes a bracket 5, through which the blower assembly 4 is fixed within the noise-reducing air duct 3. In another configuration, the blower assembly 4 is fixed to the approximately center of the noise-reducing air duct 3 in the vertical direction by the bracket 5, where the bracket 5 at least partially contacts the wall of the noise-reducing air duct 3, and the contact area between the bracket 5 and the blower assembly 4 is at least 220 mm². 2 This method facilitates more uniform airflow within the noise-reducing air duct 3 and uniform entry into the internal gas flow channel 45 of the blower assembly 4. The support 5 has at least two different wall thicknesses, which helps the support to better reduce noise in the blower assembly 4. When the blower assembly 4 is located at its basic center in a top-view perspective, the aforementioned blower assembly air inlet 41 is located approximately at the center of the chamber of the noise-reducing air duct 3; in another embodiment, the blower assembly air inlet 41 is located approximately at the center of the chamber of the noise-reducing air duct 3, and the blower assembly air inlet 41 and the noise-reducing air duct inlet 31 are not concentric. Concentric circles are drawn with the center of the blower assembly air inlet 41 until they are tangent to each outer edge of the noise-reducing air duct 3, and the difference in radius between the closest and furthest concentric tangent circles from each outer edge of the noise-reducing air duct 3 does not exceed 80mm (e.g., ...). Figure 11(d1≤80mm). When the blower assembly 4 is located approximately at the center of the noise reduction air duct 3 in the vertical direction, select one side of the noise reduction air duct 3, and take the midpoint of the line connecting the highest and lowest points of the blower assembly 4 with the midpoint of the line connecting the highest and lowest points of the noise reduction air duct 3 as a whole. The distance between these points should not exceed 80mm (e.g., d1≤80mm). Figure 12 (d2≤80mm).

[0090] In another embodiment, the blower assembly 4 is placed within the noise-reducing air duct 3 such that the gas enters from the air inlet 41 of the blower assembly 4 in a horizontal direction (e.g., Figure 20 (As shown).

[0091] In another embodiment, the blower assembly 4 is placed in a non-central position in the noise reduction air duct 3.

[0092] In another embodiment, the support 5 within the device 1 that provides positive airway pressure has another form (such as...). Figure 21 (As shown).

[0093] In another embodiment, the noise-reducing airway 3 within the device 1 providing positive airway pressure has another form (such as...). Figure 22 (As shown).

[0094] The device 1 for providing positive airway pressure according to the present invention has at least the following beneficial effects:

[0095] 1) Utilizing scientific theories and experimental data, the internal structure of the device providing positive air pressure and the placement of its components (such as the blower assembly) were innovated and optimized, resulting in a more efficient and noise-reducing structural form. ① During the development and design of the internal noise-reducing air duct, the influence of the ratio between the blower assembly and the noise-reducing air duct on the device's noise level was thoroughly investigated. It was found that the ratio affects the noise level of the device. Through data review and careful study and comparison of various volumes of the blower assembly and noise-reducing air duct with different ratios, and testing in a soundproof room meeting standard noise levels, the accuracy and reliability of the test results were ensured. It was concluded that a volume ratio of 3-18 between the blower assembly and the noise-reducing air duct has a more significant noise reduction effect. Through scientific and accurate theoretical data, the volumes of the noise-reducing air duct and the blower assembly were more precisely specified, enabling the noise-reducing air duct of this invention to achieve a superior noise reduction effect. In today's society, patients have increasingly higher requirements for the quiet performance of devices providing positive airway pressure. This invention offers an innovative solution to meet this need: by standardizing data, it provides a safe and effective noise reduction method, offering patients a more effective way to reduce noise, aligning with the growing expectations and demands of patients for quiet treatment devices. ② Placing the blower assembly in a roughly centered position within the noise-reducing airway helps provide a more uniform airflow path and extends the airflow trajectory. The blower assembly is positioned roughly centered within the noise-reducing airway chamber from a top-down perspective, ensuring that the air inlet of the blower assembly is also roughly centered. This allows for uniform airflow from all sides when the air enters the blower from the chamber, avoiding excessively large or small local airflows, thereby reducing differences in airflow velocity and improving airflow stability and uniformity. This method also effectively disperses and balances the airflow before it enters the blower assembly, reducing the possibility of airflow vibration and further reducing turbulence and noise caused by airflow bending and twisting. Positioning the blower assembly vertically and centrally within the noise-reducing airway reduces the distance difference between the blower assembly and the inner wall of the airway housing, helping to reduce corresponding airflow resistance and pressure fluctuations, thereby improving the efficiency and stability of the noise-reducing airway. The vertically central position of the blower assembly also increases the airflow path, providing a vertical flow path in addition to a horizontal one. This increased flow path promotes more uniform and stable airflow, thus reducing noise. ③ Setting the outlet and inlet of the noise-reducing airway on two different, perpendicular planes reduces the possibility of noise superposition. When airflow enters the noise-reducing airway from the inlet, due to fluid characteristics and velocity distribution, the inlet is often the main source of airflow noise. Therefore, setting the inlet and outlet perpendicular to each other helps to separate these two key areas, reducing noise by moving the larger noise source away from the patient.④ Using a quieter centrifugal blower assembly is a highly effective way to reduce device noise. Since the blower assembly is actually the primary source of noise, using a quieter blower can fundamentally reduce the actual noise level of the device compared to employing more noise-reducing structures or foam materials. This method is not only more effective but also more convenient, significantly improving the noise performance of the device and enhancing user comfort and experience. The centrifugal blower assembly used in this invention not only has lower noise levels than axial flow blower assemblies but also higher efficiency. After determining the blower assembly type, the noise-reducing air duct of this invention is designed according to the selected blower assembly type, ensuring that the noise-reducing air duct works in conjunction with the blower assembly to achieve the best noise reduction effect under this configuration.

[0096] 2) Lowering the internal gas flow channel of the blower assembly offers several advantages in terms of noise and usability compared to existing blower assemblies. ① Lowering the internal gas flow channel to the center of the blower assembly allows the airflow entering the assembly to pass through the motor, thus carrying away the heat generated by the motor's operation. This helps dissipate heat from the motor and maintains it within a suitable temperature range, preventing overheating from prolonged use and improving motor efficiency and lifespan, thereby increasing the efficiency and lifespan of the blower assembly. ② Existing blower assemblies have the gas flow channel designed at the impeller. This design causes the airflow, immediately pressurized by the impeller, to enter the gas flow channel and be output. The sudden and rapid change in airflow at the impeller and gas flow channel can lead to turbulence or irregular flow, increasing the noise of the blower assembly. Furthermore, this sudden change can cause airflow oscillations, further exacerbating the noise problem. In contrast, lowering the gas flow channel to the near-central position of the blower assembly provides a buffer space for the newly pressurized airflow, allowing it to flow more smoothly and evenly along the gas flow channel path. This reduces turbulence and irregular flow within the blower assembly, thus reducing noise. ③ When a blower assembly uses a closed impeller, unlike a non-closed impeller, its blades are enclosed in a sealed casing. The impeller has a central opening, through which airflow enters and exits at higher pressure from the relatively enclosed structure, passing through the impeller flow channel formed by the blades. Non-closed impellers, on the other hand, have a more open structure, allowing airflow to flow freely on both sides of the impeller without much path restriction. Therefore, blower assemblies using closed impellers require a lowered gas flow channel to provide more space for the integration and guidance of the pressurized airflow, improving the performance and efficiency of the blower assembly. ④ Designing the gas flow channel at the center of the blower assembly also benefits the stability of the blower assembly within the noise-reducing air duct. In existing market blower assemblies, the internal gas flow channel is located at the top, while this invention moves it downwards, meaning the overall center of gravity of the blower assembly also shifts downwards, moving closer to the center of the blower assembly. This reduces mechanical vibration caused by changes in airflow pressure and velocity, further improving the blower's operational stability and safety. It also helps the support frame to more stably and securely fix the blower assembly within the noise-reducing air duct, reducing some motor noise. ⑤ This invention primarily employs a centrifugal blower assembly placed upside down within the air duct, altering the direction and speed of airflow. This reduces eddies and vortices generated during airflow by positioning the blower assembly's impeller in a specific direction. Combined with the special chamber structure of this invention, the sound from the blower assembly's outlet is contained, thus reducing noise generation.This invention reduces noise by calculating the overall volume of the blower assembly and the volume of the noise-reducing air duct chamber, and by designing the gas flow channel and internal components (such as supports), converting acoustic energy into kinetic energy. The gas flow channel is designed to enclose the blower assembly at its center, and a corresponding chamber is set at the blower assembly's air inlet to utilize the gas or components within the chamber to reduce noise. Further coordination between the gas flow channel and the blower creates a height difference in the airflow path, increasing the airflow path in space while ensuring the device's flow rate. Furthermore, the reasonable and smooth design of the connections between various components and chambers reduces turbulence, making the noise flow path smoother.

[0097] 3) Compared to existing suspension systems on the market, the bracket of this invention provides greater stability to the blower assembly while aiding in noise reduction. A portion of the bracket is designed to connect to the bottom wall of the chamber containing the blower, and elastic elements are incorporated at its top and at the air outlet of the blower assembly, forming part of the overall bracket structure. This method fixes the blower assembly at several fixed points around it, firmly securing it within one of the chambers of the noise-reducing air duct. Compared to existing suspension systems, this method provides greater stability and significantly reduces the risk of damage to the blower assembly due to vibration or external impact. Furthermore, the bracket of this invention surrounds the air inlet and outlet of the blower assembly, providing both support and sealing to prevent air leakage.

[0098] The embodiments of the invention have been described above with reference to the accompanying drawings. However, the invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the invention without departing from the spirit and scope of the claims. All of these are within the scope of protection of the invention.

Claims

1. A device for providing positive airway pressure for pressurizing breathable gas and delivering it into a patient's airway for the treatment of respiratory-related diseases, characterized in that, The device that provides positive airway pressure includes: The device housing is configured to enclose the internal components; The noise reduction airway has an inlet, an outlet, an inner wall, and an outer wall, wherein the central axis of the inlet and the central axis of the outlet of the noise reduction airway form an angle. The blower assembly has an air inlet and an air outlet, wherein the central axes of the air inlet and the air outlet are perpendicular to each other. Breathable gas enters from the air inlet of the blower assembly and flows tangentially along the impeller rotation direction to the air outlet of the blower assembly. The blower assembly includes a blower housing, an impeller, a motor, and an internal gas flow passage thereof, wherein the internal gas flow passage of the blower assembly is at least partially located below the impeller; The volume ratio of the blower assembly to the noise reduction air duct ranges from 3 to 18, and when the blower assembly is fixed to the noise reduction air duct, the distance between it and the inner wall of the noise reduction air duct is greater than or equal to 3 mm.

2. The device for providing positive airway pressure according to claim 1, characterized in that, From a top-down view, the air inlet of the blower assembly is located approximately at the center of the noise reduction air duct it is in.

3. The device for providing positive airway pressure according to claim 1, characterized in that, The noise-reducing airway has a first chamber, a second chamber, and a wall that separates the first chamber from the second chamber, the wall having an opening.

4. The device for providing positive airway pressure according to claim 1, characterized in that, The inlet and outlet of the noise-reducing airway are not on the same horizontal plane.

5. The device for providing positive airway pressure according to claim 1, characterized in that, The noise reduction air duct outlet area is 0.7-1.5 times the air outlet area of ​​the blower assembly.

6. The device for providing positive airway pressure according to claim 1, characterized in that, The device for providing positive pressure in the airway also includes a bracket, through which the blower assembly is fixed within the noise-reducing airway.

7. A device for providing positive airway pressure for pressurizing breathable gas and delivering it into a patient's airway for the treatment of respiratory-related diseases, characterized in that, The device that provides positive airway pressure includes: The device housing is configured to enclose the internal components; The noise-reducing airway has an inlet, an outlet, an inner wall, and an outer wall, and is configured to deliver breathable gas. The blower assembly, having an air inlet and an air outlet, is configured to pressurize the gas entering the noise reduction air duct. The blower assembly includes a blower housing, an impeller, a motor, and an internal gas flow passage thereof, wherein the internal gas flow passage of the blower assembly is at least partially located below the impeller; The device for providing positive pressure in the airway also includes a bracket. The blower assembly is fixed to the approximate center position of the noise reduction airway in the vertical direction by the bracket. The air inlet of the blower assembly and the inlet of the noise reduction airway are not concentric, while the air outlet of the blower assembly and the outlet of the noise reduction airway are concentric. The height of the noise reduction air duct differs from the height of the blower assembly by at least 5mm.

8. The device for providing positive airway pressure according to claim 7, characterized in that, The blower assembly is placed within the noise-reducing air duct, and the breathable gas flows from the air inlet of the blower assembly with its axis parallel to the horizontal plane.

9. The device for providing positive airway pressure according to claim 7, characterized in that, An outlet pipe is provided at the outlet of the noise reduction airway.

10. The device for providing positive airway pressure according to claim 7, characterized in that, The air outlet of the blower assembly and the outlet of the noise reduction air duct are connected by an elastomer seal.

11. The device for providing positive airway pressure according to claim 7, characterized in that, The support has at least two different wall thicknesses.

12. The device for providing positive airway pressure according to claim 11, characterized in that, The contact area between the bracket and the blower assembly is at least 220 mm². 2 .

13. The device for providing positive airway pressure according to claim 11, characterized in that, The support is at least partially in contact with the inner wall of the noise-reducing airway.

14. A device for providing positive airway pressure for pressurizing breathable gas and delivering it into a patient's airway for the treatment of respiratory-related diseases, characterized in that, The device that provides positive airway pressure includes: The device housing is configured to enclose the internal components; The noise-reducing airway has an inlet, an outlet, an inner wall, and an outer wall, and is configured to deliver breathable gas. The blower assembly, placed within the noise-reducing air duct, has an inlet and an outlet, configured to pressurize the gas entering the noise-reducing air duct. The outlet of the blower assembly is sealed to the outlet of the noise-reducing air duct via an elastomer. The blower assembly includes a blower housing, an impeller, a motor, and an internal gas flow passage thereof, wherein the internal gas flow passage of the blower assembly is at least partially located below the impeller; The impeller is a closed impeller.

15. The device for providing positive airway pressure according to claim 14, characterized in that, The impeller has a central opening, and the air inlet of the blower assembly is greater than or equal to the central opening of the impeller.

16. The device for providing positive airway pressure according to claim 14, characterized in that, The blower assembly is placed inside the noise reduction air duct, and the breathable gas flows from the air inlet of the blower assembly perpendicular to the horizontal plane.

17. The device for providing positive airway pressure according to claim 14, characterized in that, The inlet and outlet of the noise-reducing airway are not on the same horizontal plane.

18. The device for providing positive airway pressure according to claim 14, characterized in that, The wall of the noise-reducing airway is made of one of the following: polypropylene (PP), polycarbonate (PC), polyethylene terephthalate-1,4-cyclohexanediol ester (PCTG), polyamide (PA), and polyetheretherketone (PEEK).

19. A device for providing positive airway pressure for pressurizing breathable gas and delivering it into a patient's airway for the treatment of respiratory-related diseases, characterized in that, The device that provides positive airway pressure includes: The device housing is configured to enclose the internal components; The noise-reducing airway has an inlet, an outlet, an inner wall, and an outer wall, and is configured to deliver breathable gas. The blower assembly, having an air inlet and an air outlet, is configured to pressurize the gas entering the noise-reducing air duct. The blower assembly is fixed inside the noise-reducing air duct. The air inlet of the blower assembly is not concentric with the inlet of the noise-reducing air duct, while the air outlet of the blower assembly is concentric with the outlet of the noise-reducing air duct. The blower assembly includes a blower housing, an impeller, a motor, and an internal gas flow passage, the internal gas flow passage of the blower assembly being at least partially located below the impeller; The impeller is a closed impeller; Breathable gas enters from the blower assembly inlet and flows tangentially along the impeller rotation direction to the blower assembly outlet.

20. The device for providing positive airway pressure according to claim 19, characterized in that, The noise-reducing airway has a first chamber, a second chamber, and a wall that separates the first chamber from the second chamber, the wall having an opening.

21. The device for providing positive airway pressure according to claim 19, characterized in that, The noise reduction air duct inlet axis is parallel or perpendicular to the blower assembly air inlet axis.

22. The device for providing positive airway pressure according to claim 19, characterized in that, The air outlet of the blower assembly and the outlet of the noise reduction air duct are connected by an elastomer seal.

23. The device for providing positive airway pressure according to claim 19, characterized in that, The impeller has a central opening, and the air inlet of the blower assembly is greater than or equal to the central opening of the impeller.

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