Respiration related device with containing cavity

Abstract

A respiration-related device having a containment cavity configured to deliver pressurized breathable gas to a respiratory tract of a patient, the device comprising a blower configured to generate pressurized breathable gas, an airway having at least two chambers, a housing containing the airway; wherein at least one cavity is a containing cavity, the other cavities are flowing cavities, the containing cavity and the flowing cavities are communicated through the neck part, and when the device is in a use state, airflow basically does not pass through the containing cavity; the neck is only configured to be communicated with the cavity without or with a small amount of air flow, noise enters the containing cavity through the neck and resonates with the wall of the cavity to be dissipated, and the maximum noise reduction effect of the device is achieved.

Description

Technical Field

[0001] The utility model relates to a device for improving or treating respiratory system-related diseases such as sleep apnea, including at least one blower and an airway having at least two chambers. Background Art

[0002] Good sleep is crucial for the human body to ensure physical strength and restore energy. Obstructive sleep apnea hypopnea syndrome (OSAHS), commonly known as "snoring", is one of the most common sleep diseases that seriously endanger human health. Obstructive sleep apnea refers to the excessive relaxation of the muscles in the back of the throat, resulting in abnormal breathing. These muscles support the back of the top of the oral cavity (i.e., the soft palate), the tongue, and the side walls of the throat; when the muscles relax, the airway will narrow or close during inhalation, leading to a decrease in the oxygen content in the blood; at this time, the brain senses the breathing disorder and briefly wakes up to reopen the airway; alternatively, there may be nasal congestion, choking, or a loud wheezing sound. This sleep breathing pattern can repeat 5 to more than 30 times per hour depending on the severity of the condition, or the apnea-hypopnea index (AHI) is greater than or equal to 5 times per hour, accompanied by clinical symptoms such as drowsiness, which will interfere with the patient's ability to enter the deep sleep stage, resulting in sleep deprivation, daytime drowsiness, etc. Given the great harm of sleep disorders, it is crucial to diagnose sleep disorders, and timely treatment can protect the physical and mental health of patients.

[0003] For mild sleep apnea, the occurrence of sleep apnea symptoms can be reduced by changing lifestyles such as weight loss, smoking cessation, and adjusting sleeping positions. For moderate to severe sleep apnea, medical devices are needed to open the blocked airway; in more serious cases, surgery may be required.

[0004] In the treatment methods of medical devices, continuous positive airway pressure (CPAP) is currently the most effective non-surgical treatment method for obstructive sleep apnea hypopnea syndrome (OSAHS). One type of positive pressure breathing device is the continuous positive airway pressure (CPAP) ventilation device, which is a pump that can increase the upper airway pressure during sleep. It uses a mask to send a continuous positive pressure airflow into the airway, so that the airway does not collapse during the entire respiratory cycle due to being in a positive pressure state. CPAP can be divided into fixed or auto-adjustable types. Another type is the bilevel positive airway pressure (BiPAP) device, which is also a non-invasive ventilation device that can set the inspiratory positive airway pressure (IPAP) and expiratory positive airway pressure (EPAP) respectively. PAP treatment can significantly improve the Epworth sleepiness scale score of OSAS patients, reduce the apnea-hypopnea index (AHI) and arousal index, increase the lowest nocturnal oxygen saturation, make the snoring and apnea disappear during the sleep period of patients, significantly improve or disappear daytime sleepiness, and significantly improve or disappear other accompanying symptoms and complications. However, some people still do not want to use the PAP treatment method due to its comfort, noise, equipment maintenance effect, lack of knowledge and support, etc. Among them, about 30% to 50% of PAP users said that noise is a problem when they use PAP treatment, which means that the noise problem does affect the willingness of many people to use CPAP treatment to a certain extent. Thus, optimizing the PAP ventilator to reduce its noise can improve the acceptance of the PAP treatment method by patients to a certain extent.

[0005] The noise sources of PAP ventilators can be divided into: blowers, air flow, leakage, vibration, and structure. The blower is placed in the airway inside the ventilator. The airflow noise and vibration noise generated by the high-speed operation of the blower are closely related to the internal structure of the airway and the assembly method of the airway and the blower. The airways of existing ventilators on the market are basically equipped with sound insulation material structures inside to achieve better noise reduction. Due to its special pore structure and material properties, the sound insulation material can convert noise into tiny energy, and the noise reduction can indeed achieve good results. However, because the sound insulation material is in an environment of high pressure, high flow rate, and high vibration for a long time, the physical structure of the sound insulation material is subject to friction or heavy pressure for a long time, the connection between the pores of the sound insulation material breaks, resulting in the shedding of small particles or fragments of the sound insulation material and entering the patient's respiratory tract along with the high-flow gas, which is harmful to human health in the long term. Summary of the Invention

[0006] Based on this, it is necessary to provide a more safe, reliable and silent breathing-related device to address the above deficiencies.

[0007] The present utility model discloses a breathing-related device having an accommodation chamber, configured to deliver pressurized breathable gas to a patient's respiratory tract. The device includes:

[0008] A blower, including a motor having a rotor, at least one impeller disposed on the motor rotor, and a housing having an inlet and an outlet, the blower configured to generate pressurized breathable gas;

[0009] An air passage, including a wall having an air inlet and an air outlet, the wall forming at least two chambers;

[0010] A housing, configured to accommodate the air passage;

[0011] An electronic component, located between the housing and the air passage;

[0012] Wherein, at least one of the at least two chambers is an accommodation chamber, and at least one wall of the accommodation chamber has at least one through opening;

[0013] Wherein, when the device is in use, the breathable gas basically does not pass through the accommodation chamber.

[0014] In one embodiment, the chamber other than the accommodation chamber is called a flow chamber, and the blower is placed in the flow chamber.

[0015] In one embodiment, the form of the wall of the accommodation chamber is a plane.

[0016] In one embodiment, the form of the wall of the accommodation chamber is a curved surface.

[0017] In one embodiment, the air flow rate passing through the at least one accommodation chamber is at most 20% of the overall air flow rate of the device.

[0018] In one embodiment, the area of the through opening in the accommodation chamber is at least a circle with a diameter of 0.5 mm.

[0019] The present utility model discloses a breathing-related device having an accommodation chamber, configured to deliver pressurized breathable gas to a patient's respiratory tract. The device includes:

[0020] A blower, including a motor having a rotor, at least one impeller disposed on the motor rotor, and a housing having an inlet and an outlet, the blower configured to generate pressurized breathable gas;

[0021] An air passage, including a wall having an air inlet and an air outlet, the wall forming at least two chambers;

[0022] A housing configured to accommodate the airway;

[0023] An electronic component located between the housing and the airway;

[0024] Wherein at least one of the at least two chambers is a receiving chamber and the remaining chambers are flow chambers, and at least one wall of the receiving chamber has at least one through opening;

[0025] Wherein, except for the wall having the opening, the remaining walls of the receiving chamber are in a closed form;

[0026] Wherein the opening of the receiving chamber communicates with the flow chamber through a neck.

[0027] In one embodiment, the blower is placed in the flow chamber.

[0028] In one embodiment, the height of the neck is at least greater than 0.4 mm.

[0029] In one embodiment, the air flow rate passing through the at least one receiving chamber is at most 20% of the overall air flow rate of the device.

[0030] In one embodiment, the area of the through opening in the receiving chamber is at least 0.19625 mm 2 .

[0031] The present utility model discloses a breathing-related device having a receiving chamber, configured to deliver pressurized breathable gas to a patient's respiratory tract, the device comprising:

[0032] A blower, including a motor having a rotor, at least one impeller disposed on the motor rotor, and a housing having an inlet and an outlet, the blower configured to generate pressurized breathable gas;

[0033] An airway, including a wall having an air inlet and an air outlet, the wall forming at least two chambers;

[0034] A housing configured to accommodate the airway;

[0035] An electronic component located between the housing and the airway;

[0036] Wherein at least one of the at least two chambers is a receiving chamber and the remaining chambers are flow chambers, and at least one wall of the receiving chamber has at least one through opening;

[0037] Wherein the opening of the receiving chamber communicates with the flow chamber through a neck;

[0038] Wherein the maximum cross-sectional area of the neck is at least 0.19625 mm 2 , and the height is at least the wall thickness of the receiving chamber.

[0039] In one embodiment, the air passage of the device has a plurality of the receiving cavities.

[0040] In one embodiment, the ratio of the neck height to the receiving cavity height is at least 1:300.

[0041] In one embodiment, the maximum cross-section of the neck includes an irregular shape, wherein the cross-section of the neck is preferably circular.

[0042] In one embodiment, the wall thickness of the receiving cavity is at least 0.4 mm.

[0043] The present utility model discloses a breathing-related device having a receiving cavity, configured to deliver pressurized breathable gas to a patient's respiratory tract. The device includes:

[0044] A blower, including a motor having a rotor, at least one impeller disposed on the motor rotor, and a housing having an inlet and an outlet, the blower being configured to generate pressurized breathable gas;

[0045] An air passage, including a wall having an air inlet and an air outlet, the wall forming at least two chambers;

[0046] A housing, configured to accommodate the air passage;

[0047] An electronic component, located between the housing and the air passage;

[0048] Wherein, at least one of the at least two chambers is a receiving cavity, and the remaining chambers are flow cavities, and at least one wall of the receiving cavity has at least one through opening;

[0049] Wherein, the total volume of the receiving cavity is not less than 785 mm 2 .

[0050] In one embodiment, the air passage of the device has a plurality of the receiving cavities.

[0051] In one embodiment, the receiving cavity communicates with the flow cavity through a neck.

[0052] In one embodiment, the height of the neck is at least greater than 0.4 mm.

[0053] In one embodiment, the surface area of the receiving cavity is at most 1000 times the cross-sectional area of the neck.

[0054] Implementing the breathing-related device of the present utility model has at least the following beneficial effects:

[0055] 1. The accommodation cavity design of the present utility model effectively reduces the noise of the device. a. Location: When the respiratory-related device is in use, since the direction of the gas flow generated by the user's exhaled gas is opposite to that of the blower, or part of the gas flow impacts the airway wall and changes direction, some noise flows out from the airway inlet along with the countercurrent air; to weaken such noise, based on the principle of sound wave fluctuation and propagation, an accommodation cavity is added at the noise concentration points such as the airway inlet and the blower inlet to accommodate the noise and dissipate it through vibration; according to the different positions of the accommodation cavity and combined with the principle of aerodynamics, different noise reduction effects are achieved. For example, due to the negative pressure principle in aerodynamics, the accommodation cavity at the blower inlet forms a negative pressure inside the cavity due to the high-speed gas flow at the opening. The noise entering the accommodation cavity slows down its flow speed due to the reduction of the propagation medium, reducing the possibility of sound rebound. The noise remaining in the accommodation cavity dissipates through vibration with the wall of the accommodation cavity. b. Principle: Except for the wall connected to the neck having an opening, the remaining walls of the accommodation cavity are in a closed form, and the opening area of the neck is in a certain proportion to the surface area of the accommodation cavity, which can effectively reduce the noise flowing out from the opening; the direction of the center line of the neck and the path direction of the main gas flow form an angle of more than 30° to ensure that the noise can enter the accommodation cavity while avoiding excessive gas flow entering the accommodation cavity, so that the noise converts sound energy into kinetic energy through vibration inside the accommodation cavity. c. Material: The main function of the accommodation cavity is to convert sound energy into other forms of energy. Its material has a rigid material, so that the sound wave of the noise resonates with the wall of the accommodation cavity to convert sound energy into kinetic energy to eliminate the sound; it can also be other materials such as silica gel, so that when the sound wave of the noise passes through these materials, the sound energy is converted into heat energy through friction and vibration to reduce or eliminate the noise.

[0056] 2. The accommodation cavity can replace the sound insulation material in the respiratory-related device, improving the safety of the device. The design of the airway without sound insulation material enhances the safety of the device. In 2021, a well-known international brand issued its first global recall notice, covering some of its bilevel positive airway pressure (BiPAP) devices, continuous positive airway pressure (CPAP), and mechanical ventilator devices, and several subsequent recalls were issued. The main reason for the recall was the use of sound-absorbing and sound-insulating materials inside the airway of the ventilator, and such sound insulation materials may release particulate matter and organic substances. The FDA received a large number of complaints about the CPAP and BiPAP ventilators of a well-known international brand. This incident not only had a huge negative impact on the well-known international brand but also affected millions of users of this brand. The FDA stipulates that the noise of the registered ventilator products submitted for market approval of ventilators should reach below 30 dB. Using sound insulation materials for noise reduction is currently the simplest way to reduce noise. Sound insulation materials are easier to obtain and manufacture. Due to their special pore structure and material properties, sound insulation materials can convert noise into tiny energy. Using sound insulation materials for noise reduction can indeed achieve a good noise reduction effect. Placing sound insulation materials inside the airway is the simplest, effective, and common means to meet the regulatory noise level. Therefore, almost all the respiratory-related machines on the existing market have sound insulation materials in the gas passage for noise reduction. However, sound insulation materials are extremely likely to cause health problems for the following reasons: a. Sound insulation materials are usually made of synthetic materials such as polyurethane and polyether, which usually contain some chemical additives or components. During the use of the device, these additives or components may gradually be released and become harmful substances to the human body. Prolonged inhalation of these harmful substances may have a negative impact on the respiratory system and physical health. b. Sound insulation materials usually have water absorption, and a humid environment is generated during the use of the ventilator. Sound insulation materials are prone to breeding bacteria and molds by absorbing moisture in the air. And some ventilators have a humidification system to make patients more comfortable, which further enables sound insulation materials to absorb moisture in the internal environment. c. When the airway is working, the air flow passes through the sound insulation materials in the airway, and the sound insulation materials generate friction and vibration, which will cause damage to the surface of the sound insulation materials and produce tiny particles. The bacteria or molds generated by the water absorption of the sound insulation materials may also cause the decomposition of the sound insulation materials and produce tiny particles. These tiny particles will ultimately be inhaled by the patient into the patient's airway, which is extremely harmful to health. Some patients may also have an allergic reaction to the sound insulation materials, which may also cause respiratory allergic reactions or asthma attacks, affecting respiratory health. These characteristics determine that the service life of sound insulation materials is usually short. Therefore, theoretically, they need to be replaced frequently to maintain the functional effectiveness of the sound insulation materials in the airway, or further research and processing of the sound insulation material materials to stabilize their physical and chemical properties, but both will increase the waste of use and production costs.

[0057] The noise reduction structure of the present technology can achieve the regulatory noise level with less sound insulation material inside the airway. Compared with the airways in existing market ventilators that almost all have sound insulation materials, it improves the safety and service life of the device, and conforms to the environmental protection concept. The noise reduction structure of the present technology adopts a series of innovative designs, uses multiple high-efficiency noise reduction structures and is supported by theoretical and experimental data. Finally, the made airway has obvious noise reduction effect and can still meet the strict requirements of regulations for noise without using sound insulation material inside the airway. The airway with less sound insulation material has the following advantages: a. Since placing sound insulation material inside the airway is the simplest, effective and common means to achieve the regulatory noise level, almost all the airways in existing market breathing-related devices have sound insulation materials. However, the small particles decomposed from the sound insulation material are usually harmful to human health if inhaled by the human body, especially for ventilators that need to be used for a long time. b. The sound insulation material ages and deteriorates quickly. Compared with plastic materials, it has the shortest service life among the components inside the airway. The service life of existing airways with sound insulation material inside will be shortened due to the existence of the sound insulation material. In the present technology, patients can choose an airway with less sound insulation material, and the service life of the whole ventilator is improved by abandoning the sound insulation material. Moreover, without the sound insulation material, it means that the airway structure inside the device is simpler, without the need for additional sound insulation material fixing structures, etc. By simplifying the internal structure of the device, mechanical losses and maintenance requirements are reduced, and the reliability and stability of the device are improved. c. As a common noise reduction material, although the sound insulation material can effectively reduce noise in the ventilator, it will have a certain impact on the environment during the manufacturing, use and disposal processes. First of all, as a synthetic material, the production of the sound insulation material consumes a large amount of energy and resources, and may involve the use of chemical substances, resulting in pollution. Secondly, high-quality sound insulation materials for noise reduction are usually costly. Using good noise reduction sound insulation materials reduces the risk to health while increasing the purchase cost of the device. The design of reducing the sound insulation material inside the airway avoids the occurrence of these problems. It not only reduces the negative impact on the environment, but also reduces the generation of waste, and at the same time saves the cost of purchasing the sound insulation material. d. The airway that can achieve the regulatory noise level by reducing the sound insulation material provides patients with more flexible choices. Patients can choose an airway with sound insulation material or an airway without sound insulation material inside. For some patients with high requirements for quietness, they can choose an airway with sound insulation material to achieve lower noise and improve sleep quality. In addition to the sound insulation material, adding silicone and rubber that are harmless to health inside the airway can also reduce noise to a certain extent and eliminate the influence of the sound insulation material inside the airway. In contrast, materials such as silicone and plastic usually have better wear resistance, corrosion resistance and endurance, etc., are less affected by the environment, and silicone, plastic and other materials usually also have better chemical stability and are not easily affected by chemical factors, so their service life is longer.

[0058] Using an effective noise reduction structure such as a receiving cavity, the device can still reach the noise level specified by regulations or even lower and be more stable under the condition of no noise reduction assisted by materials that are prone to decomposition and deterioration. The device of the present utility model integrates a variety of structures that can effectively reduce noise, replacing the traditional air duct using sound insulation materials. Specifically, the various noise reduction structures adopted by the present utility model include, but are not limited to, a receiving cavity, a conical inlet pipe, a more reasonable placement form and position of the blower, an arc-shaped wall that is substantially coaxial with the blower inlet, and a form in which the inner wall of the gas passage facing the airflow path is rounded. The use of these structures and components can not only effectively reduce the noise level of the device, but more importantly, the noise reduction components in the air duct of the device, the internal structure of the air duct, and the relationship between the various structures are all based on sufficient existing and experimental data support and scientific analysis, ensuring the scientific nature and credibility of the air duct design, and improving the reliability and stability of the air duct. This scientifically credible air duct design not only improves the performance of the product, but also brings a quieter and more reliable user experience to patients.

[0059] 3. The structural design of the receiving cavity makes the device reliable and extends the service life of the machine. The air duct design without materials that are prone to decomposition and deterioration extends the service life of the device by using structures with more stable physical and chemical properties, so that the device can be used for a longer time. In addition, the design without materials that are prone to decomposition and deterioration can simplify the internal structure of the gas passage of the device, eliminating the need to design redundant structures to fix special materials, reducing the types of production components, and thus reducing the complexity of manufacturing and assembly, which helps to improve the reliability and stability of the device. At the same time, sound insulation materials often need to be replaced and cleaned in a timely manner to ensure health, and the sound insulation materials placed inside the device are often not replaceable and cleanable, while the design without sound insulation materials avoids these steps, reducing the maintenance requirements for the sound insulation materials inside the gas passage and improving the convenience of maintaining the machine. These two aspects make the respiratory-related equipment using this technology more competitive and more acceptable to the public among similar products.

[0060] 4. By using a simpler structure and material application, the cost of the machine is reduced and it conforms to the concept of environmental protection. The airway design in this utility model device abandons traditional sound insulation materials, only uses plastic parts as the outer shell of the airway and as the materials for constructing the chambers and gas channels, and uses silicone materials as the connecting parts for fixing between the blower and the airway outer shell, thus reducing the cost for producers to purchase and manufacture sound insulation materials additionally. And compared with the structure with sound insulation materials inside the airway of existing complex respiratory-related devices on the market, this airway composed of only two materials is easier to process and assemble, making its manufacturing process simpler and more efficient, saving a large amount of time and human resources. Moreover, good noise reduction and sound insulation materials are usually relatively expensive materials, increasing additional cost expenditures. In contrast, the airway design without sound insulation materials can significantly reduce these costs. In addition, reducing the use of auxiliary materials such as sound insulation materials also reduces the impact on the environment, conforming to the requirements and trends of modern society for environmental protection and making a positive contribution to environmental protection. Because sound insulation materials will release harmful chemical substances during production and processing, causing pollution to the environment. And by adopting the airway design without sound insulation materials, the release of these harmful substances is avoided, reducing the negative impact on the environment. Therefore, this airway design that does not use sound insulation materials or materials that are easy to decompose and deteriorate, and only uses silicone and plastic, not only reduces the cost of the machine but also conforms to the concept of environmental protection, and is a more sustainable and economical design solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 is a three-dimensional schematic diagram of the device in an embodiment of the present utility model;

[0062] Figure 2 is a three-dimensional schematic diagram of the device with a water tank in an embodiment of the present utility model;

[0063] Figure 3 is an exploded schematic diagram of the device in an embodiment of the present utility model;

[0064] Figure 4 is an exploded schematic diagram of the device with sound insulation materials in an embodiment of the present utility model;

[0065] Figure 5 is a three-dimensional schematic diagram of the airway of the device with multiple accommodation chambers in an embodiment of the present utility model;

[0066] Figure 6 is a three-dimensional schematic diagram of the airway of the device with an external accommodation chamber in an embodiment of the present utility model;

[0067] Figure 7 is a three-dimensional schematic diagram of the airway of the device with an internal accommodation chamber in an embodiment of the present utility model;

[0068] Figure 8Schematic diagram of the air flow path in the air duct of the device in an embodiment of the present utility model;

[0069] Figure 9 Schematic diagram of the three-dimensional cross-sectional form of the accommodation cavity of the air duct of the device in an embodiment of the present utility model;

[0070] Figure 10 Schematic diagrams of different forms of the accommodation cavity of the air duct of the device in an embodiment of the present utility model;

[0071] Figure 11 Spatial schematic diagram of the air flow path in the air duct of the device in an embodiment of the present utility model;

[0072] Figure 12 Schematic diagram of the air flow path in the air duct of the device in an embodiment of the present utility model at the A-A cross-section;

[0073] Figure 13 Schematic diagram of the angle between the neck center line and the main air flow path in the air duct of the device in an embodiment of the present utility model;

[0074] Figure 14 Schematic diagram of the cross-sectional form of the neck of the device in an embodiment of the present utility model;

[0075] Figure 15 Schematic diagram of the height of the neck in the air duct of the device in an embodiment of the present utility model;

[0076] Figure 16 Schematic diagram of multiple necks on one wall of the accommodation cavity of the air duct of the device in an embodiment of the present utility model;

[0077] Figure 17 Schematic cross-sectional diagram of the form of multiple necks on multiple walls of the accommodation cavity of the air duct of the device in an embodiment of the present utility model;

[0078] Figure 18 Schematic diagram of another form of the air duct of the device in an embodiment of the present utility model;

[0079] Figure 19 Schematic diagram of another form of the air duct of the device in an embodiment of the present utility model having multiple accommodation cavities;

[0080] Figure 20 Schematic diagram of different materials between the outer shell and the air duct of the present utility model;

[0081] Figure 21 The accommodation cavity of the air duct of the device in an embodiment of the present utility model has different materials;

[0082] Figure 22 Schematic diagram of the air duct and the outer shell sharing a wall in an embodiment of the present utility model;

[0083] Figure 23 An exploded view of the shared wall between the air passage and the outer shell in an embodiment of the present utility model;

[0084] Figure 24 An exploded view of the blower in an embodiment of the present utility model. Detailed implementation manners

[0085] To make the above objects, features, and advantages of the present utility model more apparent and understandable, the following will describe the detailed implementation manners of the present utility model with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0086] The following describes several structures of the breathing-related device of the present utility model with specific examples.

[0087] The following terms appearing in the embodiments are now explained:

[0088] Basically, approximately, roughly: In certain forms of the present technology, words such as basically, approximately, and roughly mean within plus or minus fifteen percent of the original value.

[0089] Air: In certain forms of the present technology, air can be considered to refer to the air used for breathing in life, and in other forms of the present technology, air can be considered to refer to other gases or combinations of gases that can be used for breathing, such as the atmosphere rich in more oxygen.

[0090] Environment: In certain forms of the present technology, the environment can be considered to refer to the outside of the outer shell of the airway device, and in other forms of the present technology, the environment is considered to be the surroundings of the patient's location.

[0091] Example 1

[0092] The present utility model relates to a breathing-related device 1 having an accommodation chamber, configured to deliver pressurized breathable gas to a patient's respiratory tract. The device includes a blower 3 that continuously generates a positive pressure airflow, an air passage 4 that adjusts and guides the gas, and an outer shell 2 that houses the air passage 4. Based on the principle of sound wave fluctuation and propagation, the present utility model adds a closed accommodation chamber 41 at the noise concentration area to accommodate the noise, and enables it to propagate in a medium with a slower flow rate or relatively static state, and resonate and cancel with the wall 412 of the accommodation chamber 41 to achieve a safe and scientific noise reduction effect.

[0093] Such as Figure 1 , Figures 3 - 20, Specifically, the device has at least one blower 3 configured to generate pressurized breathable gas; the blower 3 includes a motor 31 with a rotor 311, at least one impeller 32 provided on the motor rotor 311, and a housing 33 with an inlet 331 and an outlet 332; the cross-sections of the inlet 331 and the outlet 332 of the blower 3 housing 33 can be circular, elliptical, square, etc., the inlet 331 and the outlet 332 of the blower 3 housing 33 can be openings or channels with a height, the centerlines of the inlet 331 and the outlet 332 of the blower 3 housing 33 can be at any angle (such as parallel axial flow type, perpendicular turbine type), and the material of the blower 3 housing 33 can be made of one or more of medical materials such as polypropylene (PP), polycarbonate (PC), polyethylene terephthalate-1,4-cyclohexanedimethanol ester (PCTG), polyamide (PA), polyetheretherketone (PEEK), silica gel, rubber, thermoplastic elastomer (TPE), thermoplastic polyurethane (TPU), fluororubber, etc.

[0094] An air passage 4 includes a wall 44 with an air inlet 45 and an air outlet 46, and the wall 44 forms at least two chambers. The overall shape of the air passage 4 can be a cube, a cylinder or other shapes that are conducive to gas flow. The cross-sections of the air inlet 45 and the air outlet 46 of the wall 44 of the air passage 4 can be circular, elliptical, square, etc., the air inlet 45 and the air outlet 46 of the wall 44 of the air passage 4 can be openings or channels with a height, the centerlines of the air inlet 45 and the air outlet 46 of the wall 44 of the air passage 4 can be at any angle, and the material of the wall 44 of the air passage 4 can be rigid materials such as polypropylene (PP), polycarbonate (PC), polyethylene terephthalate-1,4-cyclohexanedimethanol ester (PCTG), polyamide (PA), polyetheretherketone (PEEK), etc., or flexible materials such as silica gel, rubber, thermoplastic elastomer (TPE), thermoplastic polyurethane (TPU), fluororubber, and other materials such as metal. Among them, at least one of the chambers formed by the wall 44 is a receiving chamber 41, and the remaining chambers are flow chambers 43. When the device is in use, the breathable gas basically does not pass through the receiving chamber 41 (herein, "basically" is specifically defined as the air flow rate passing through at least one receiving chamber 41 is at most 20% of the overall air flow rate of the device), such as Figure 10 A and Figure 10 B, the receiving chamber 41 can be a cube, a sphere, an ellipsoid or other shapes, the total volume of the receiving chamber 41 is at most half of the overall volume of the air passage 4 and the total volume of the receiving chamber 41 is not less than 785 mm 2(i.e., the volume of a cylinder with a diameter of at least 10 mm and a height of 10 mm); at least one wall 412 of the receiving cavity 41 has at least one through-opening 411 (in other embodiments, the receiving cavity 41 has one through-opening 411 on the same wall 412, or multiple through-openings 411 on the same wall 412, or multiple through-openings 411 on different walls 412), and the area of a single opening 411 is at least 0.19625 mm 2 (i.e., a circular hole with a diameter of 0.5 mm). The shape of the opening 411 can be circular, oval, square, triangular, etc., and a circular shape is preferred. Except for the wall 412 with the opening 411, the remaining walls 412 of the receiving cavity 41 are in a closed form to ensure that noise sound waves enter the receiving cavity 41 through the opening 411 and provide sufficient walls 412 for resonance cancellation with the sound waves without bouncing back from the opening 411. The form of the wall 412 of the receiving cavity 41 can be planar or curved, and the thickness of the wall 412 of the receiving cavity 41 is at least 0.4 mm. The receiving cavity 41 is usually arranged at noise concentration points such as the air inlet 45 of the air duct 4, the inlet 331 of the blower 3, etc., and can be externally connected to the flow cavity 43 or internally placed in the flow cavity 43. The flow cavity 43 is configured to allow breathable gas to flow, and the flow cavity 43 has a connection structure 431 connected to the receiving cavity 41, which can be an opening, a protrusion, a groove, a buckle, etc., or a non-detachable connection such as glue or integral molding; the blower 3 is arranged in the flow cavity 43 and is fixed to the air duct 4 through a connecting member, and the connecting member can be a plastic part with a shock-absorbing structure or a flexible material such as silica gel, rubber, thermoplastic elastomer (TPE), thermoplastic polyurethane (TPU), fluororubber, etc. In addition, the opening 411 of the receiving cavity 41 communicates with the flow cavity 43 through the neck 5; the neck 5 has a first end 51 connected to the receiving cavity 41 and a second end 52 connected to the flow cavity 43. Among them, the first end 51 of the neck 5 is connected to the opening 411 of the receiving cavity 41, and the second end 52 of the neck 5 is connected to the connection structure 431 of the flow cavity 43. The receiving cavity 41, the neck 5, and the flow cavity 43 constitute a complete air duct 4; in other embodiments, the neck 5 is integrally formed with the receiving cavity 41 and the flow cavity 43. As Figure 15 A, the neck 5 is usually a straight channel with a certain height, and the height of the neck 5 is at least greater than 0.4 mm (such as Figure 15B. In other embodiments, the neck 5 is an open end 411 with only a wall thickness, where the thickness of the wall 412 of the accommodation chamber 41 is at least 0.4 mm; in another embodiment, the neck 5 is a curved channel. The ratio of the height of the neck 5 to the height of the accommodation chamber 41 is at least 1:300, where the height of the neck 5 is preferably 1 / 17 - 1 / 3 of the height of the accommodation chamber 41. The parallel cross-sections of the neck 5 from the first end 51 to the second end 52 are the same (including but not limited to the same shape and size). The maximum cross-section of the neck 5 can be a regular or irregular shape such as a circle, ellipse, square, rhombus, etc. (i.e., a shape that cannot be defined or named). Among them, the cross-section of the neck 5 is preferably circular, and the neck 5 is at least a round hole with a diameter of 0.5 mm. The surface area of the accommodation chamber 41 is at most 1000 times the cross-sectional area of the neck 5. The neck 5 is only configured to connect the chambers without passing through or passing through a small amount of air flow (i.e., the air flow passing through the neck 5 is at most 20% of the total air flow of the device). Therefore, the direction of the center line of the neck 5 is set, and the air flow line in the flow chamber 43 is set to form a main air flow path. The angle between the tangent direction of the main air flow path at the connection structure 431 of the flow chamber 43 and the center line of the neck 5 is greater than or equal to 30°, as shown in Figure 13 A. Usually, the center line of the inlet 331 of the blower 3 is parallel to the center line of the neck 5 (as shown in Figure 13 B, 13C. In other embodiments, it can be at any angle). In some types of air ducts 4, when the noise control is reasonable, the air duct 4 is configured to have only the accommodation chamber for noise reduction. In some cases, there are noise reduction components in the flow chamber 43 that cooperate with the accommodation chamber 41 for noise reduction. This method further reduces the noise on the original basis. For example, there are multiple walls of the same form spaced at a certain distance in the flow chamber 43 of the air duct 4, which are configured to reduce the noise of the air flow entering the chamber.

[0095] The housing 2 is configured to accommodate the air duct 4. The specific form of the housing 2 is determined according to the structure of the internal air duct 4. The housing 2 has a first opening 21 and a second opening 22. The first opening 21 is configured to allow air flow to enter, and the second opening 22 is configured to allow air flow to exit. The housing 2 is made of one or more materials such as rigid materials like polypropylene (PP), polycarbonate (PC), polyethylene terephthalate - 1,4 - cyclohexanedimethanol ester (PCTG), polyamide (PA), polyetheretherketone (PEEK), flexible materials like silica gel, rubber, thermoplastic elastomer (TPE), thermoplastic polyurethane (TPU), fluororubber, and other materials like metal. As shown in Figure 20 B. In other embodiments, a sound insulation material 7, a flexible buffer such as silica gel, etc., which has good dispersion or absorption of vibration energy, is placed between the housing 2 and the air duct 4; as shown in Figure 20A. In other embodiments, there is a certain distance between the outer shell 2 and the airway 4; in other embodiments, the outer shell 2 is in close contact with the airway 4.

[0096] An electronic component 9, located between the outer shell 2 and the airway 4, includes a printed circuit board, a power supply, an indication signal, a screen, etc.

[0097] In other embodiments, such as Figure 2 , the breathing-related device 1 includes a blower 3, an airway 4, a water tank 6, and an outer shell 2. The material of the water tank 6 can be made of one or more of rigid materials such as polypropylene (PP), polycarbonate (PC), polyethylene terephthalate-1,4-cyclohexanedimethanol ester (PCTG), polyamide (PA), polyetheretherketone (PEEK), etc., and flexible materials such as silica gel, rubber, thermoplastic elastomer (TPE), thermoplastic polyurethane (TPU), fluororubber, etc.; in other embodiments, the water tank 6 can be in a portable and foldable form.

[0098] In other embodiments, such as Figure 2 , the breathing-related device 1 includes a blower 3, an airway 4, a water tank 6, and an outer shell 2. The outer shell 2 is configured to accommodate the airway 4, and the specific form of the outer shell 2 is determined according to the internal structure of the airway 4. The outer shell 2 has a first opening 21 configured to allow air flow to enter, and the water tank 6 has a second opening 22 configured to allow air flow to exit.

[0099] In other embodiments, such as Figure 11 、 12 、22、23, the airway 4 of the breathing-related device 1 shares a wall with the outer shell 2, that is, the inner wall of the outer shell 2 constitutes the airway 4; in other embodiments, the airway 4 of the breathing-related device 1 shares a part of the wall with the outer shell 2, that is, a part of the inner wall of the outer shell 2 and the wall of the airway 4 together constitute an air flow channel.

[0100] Example 2

[0101] The present utility model relates to a breathing-related device 1 having a receiving cavity 41, configured to deliver pressurized breathable gas to a patient's respiratory tract. The device includes a blower 3 that continuously generates a positive pressure air flow, an airway 4 that adjusts and guides the gas, and an outer shell 2 that accommodates the airway 4 (in another embodiment, the breathing-related device 1 includes a blower 3, an airway 4, a water tank 6, and an outer shell 2).

[0102] The difference between this embodiment and Embodiment 1 is that: there are two receiving cavities 41 in the airway 4. One of the receiving cavities 41 is externally connected to the air inlet 45 of the airway 4 through a neck 5, and the other receiving cavity 41 is built into the flow cavity 43. Such as Figure 13B. Specifically, the accommodation chamber 41 has an opening 411 and is connected to the connection structure 431 of the flow chamber 43 through the neck 5. The central axis of the neck 5 is at a 90° angle to the direction of the main air flow path at the connection structure 431 of the flow chamber 43. The air flow rate of a single accommodation chamber is at most 3% of the device air flow rate. In this embodiment, the accommodation chamber 41 receives the sound waves at the air inlet 45 of the air duct 4 and provides multi-faceted walls 412 to resonate with the sound waves, converting the sound energy into kinetic energy and dissipating it. The blower 3 is placed in the flow chamber 43, and the inlet 331 of the blower 3 is connected to the flow chamber 43. The accommodation chamber 41 is arranged in the flow chamber 43, and the accommodation chamber 41 has an opening 411 coaxial with the inlet 331 of the blower 3, and the opening 411 faces the inlet 331 of the blower 3. When the device is in the working state, the high-speed gas flow generated by the blower 3 creates a negative pressure in the accommodation chamber 41. The noise entering the accommodation chamber 41 slows down its flow speed due to the reduction of the propagation medium, reducing the possibility of sound rebound. The noise remaining in the accommodation chamber 41 dissipates through the vibration of the wall 412 of the accommodation chamber 41. The overall noise of the air duct 4 is filtered twice by the accommodation chamber 41 to achieve a quieter effect.

[0103] In another embodiment, the device may have multiple blowers 3, and the number of flow chambers 43 and accommodation chambers 41 can be adjusted accordingly to achieve the optimal noise level.

[0104] Example 3

[0105] The present utility model relates to a respiratory-related device 1 having an accommodation chamber 4, configured to deliver pressurized breathable gas to a patient's respiratory tract. The device includes a blower 3 that continuously generates a positive pressure air flow, an air duct 4 that regulates and guides the gas, and a housing 2 that houses the air duct 4 (in another embodiment, the respiratory-related device 1 includes a blower 3, an air duct 4, a water tank 6, and a housing 2).

[0106] The difference between this embodiment and Embodiment 1 is that the wall 412 of the accommodation chamber 41 is composed of at least two materials (such as sound insulation material 7 + plastic, silicone + plastic). Figure 21, in this embodiment, the wall 412 of the accommodation cavity 41 includes a rigid material made of the same material as the wall 44 of the air passage 4 and a first material 8 different from the rigid material. The rigid material serves as the basic structure of the accommodation cavity 41 to ensure its stability and durability. The first material 8 is used to optimize the effect of absorbing, dissipating, or isolating noise. A better material can assist the rigid plastic to further reduce noise. The first material 8 can be one of the sound insulation material 7, silica gel, rubber, thermoplastic elastomer (TPE), thermoplastic polyurethane (TPU), fluororubber, or any other material. This method takes into account the characteristics of different materials and their acoustic effects to achieve a better noise reduction effect. In the case where the sound insulation material 7 is present in the wall 412 constituting the accommodation cavity 41, the principle of noise reduction by the sound insulation material 7 is mainly based on its pore structure and material properties, providing multiple acoustic impedances that help effectively absorb and disperse sound wave energy. When the sound wave enters the sound insulation material 7, it will be reflected and refracted multiple times in the pores, and due to the certain damping characteristics of the sound insulation material 7 itself, this process can effectively convert the sound wave energy into heat energy or mechanical energy, resulting in a gradual decrease in the sound wave energy, thereby reducing the propagation and influence of noise, and at the same time reducing impact and vibration.

[0107] In other embodiments, in the case where the wall 412 constituting the accommodation cavity 41 has a silica gel material, due to the high flexibility and plasticity of the silica gel, it can adapt to various complex surfaces and structures, thus effectively filling and covering the areas generating noise, and the tiny vibrations of the silica gel molecules under the action of sound waves consume the energy of the sound waves, thereby achieving the noise reduction effect.

[0108] In addition, the design of the accommodation cavity 41 with multiple materials not only improves the noise reduction level of the air passage 4 to a certain extent but also provides greater flexibility for the subsequent optimization and improvement of the air passage 4, allowing it to be adjusted according to specific application requirements and acoustic performance, so as to achieve more efficient noise reduction in a specific frequency range.

[0109] Implementing the respiratory-related device of the present utility model has at least the following beneficial effects:

[0110] 1. The accommodation cavity design of the present utility model effectively reduces the noise of the device. a. Location: When the respiratory-related device is in use, since the direction of the gas flow generated by the user's exhaled gas is opposite to that of the blower, or part of the air flow impacts the airway wall and changes direction, some noise flows out from the airway inlet along with the countercurrent air; to weaken such noise, based on the principle of sound wave fluctuation and propagation, an accommodation cavity is added at the noise concentration points such as the airway inlet and the blower inlet to accommodate the noise and dissipate it through vibration; according to the different positions of the accommodation cavity, combined with the principle of aerodynamics, different noise reduction effects are achieved. For example, the accommodation cavity set at the blower inlet forms a negative pressure in the cavity due to the high-speed gas flow at the opening according to the negative pressure principle in aerodynamics. The noise entering the accommodation cavity slows down its flow speed due to the reduction of the propagation medium, reducing the possibility of sound rebound. The noise remaining in the accommodation cavity dissipates through vibration with the wall of the accommodation cavity. b. Principle: Except for the wall connected to the neck having an opening, the remaining walls of the accommodation cavity are in a closed form, and the opening area of the neck is in a certain proportion to the surface area of the accommodation cavity, which can effectively reduce the noise flowing out from the opening; the direction of the center line of the neck forms an angle of more than 30° with the path direction of the main air flow to ensure that the noise can enter the accommodation cavity while avoiding too much air flow entering the accommodation cavity, so that the noise converts the sound energy into kinetic energy through vibration in the accommodation cavity. c. Material: The main function of the accommodation cavity is to convert the sound energy into other forms of energy. Its material has a rigid material, so that the sound wave of the noise resonates with the wall of the accommodation cavity to convert the sound energy into kinetic energy to eliminate the sound; it can also be other materials such as silica gel, so that when the sound wave of the noise passes through these materials, the sound energy is converted into heat energy through friction and vibration to reduce or eliminate the noise.

[0111] 2. The accommodation cavity can replace the sound insulation material in the respiratory-related device, improving the safety of the device. The design of the airway without sound insulation material enhances the safety of the device. In 2021, a well-known international brand issued its first global recall notice, covering some of its bilevel positive airway pressure (BiPAP) devices, continuous positive airway pressure (CPAP) and mechanical ventilator devices, and several subsequent recalls have been issued. The main reason for the recall was the use of sound-absorbing and sound-insulating materials inside the airway of the ventilator, and such sound insulation materials may release particulate matter and organic substances. The FDA received a large number of complaints about the CPAP and BiPAP ventilators of a well-known international brand. This incident not only had a huge negative impact on the well-known international brand, but also affected millions of users of this brand. The FDA stipulates that the noise of the registered ventilator products submitted for the marketing approval of ventilators should reach below 30 dB, and using sound insulation materials for noise reduction is currently the simplest way to reduce noise. Sound insulation materials are easier to obtain and manufacture. Due to their special pore structure and material properties, sound insulation materials can convert noise into tiny energy. Using sound insulation materials for noise reduction can indeed achieve a good noise reduction effect. Placing sound insulation materials inside the airway is the simplest, effective and common means to meet the regulatory noise level. Therefore, almost all the respiratory-related machines in the existing market have sound insulation materials in the gas passage for noise reduction. However, sound insulation materials are extremely likely to cause health problems for the following reasons: a. Sound insulation materials are usually made of synthetic materials such as polyurethane and polyether, which usually contain some chemical additives or components. During the use of the device, these additives or components may gradually be released and become harmful substances to the human body. Prolonged inhalation of these harmful substances may have a negative impact on the respiratory system and physical health. b. Sound insulation materials usually have water absorption, and a humid environment is generated during the use of the ventilator. Sound insulation materials are prone to breeding bacteria and molds by absorbing moisture in the air. And some ventilators have a humidification system to make the patients more comfortable, which further enables the sound insulation materials to absorb moisture in the internal environment. c. When the airway is working, the air flow will pass through the sound insulation materials in the airway, and the sound insulation materials will generate friction and vibration, which will cause damage to the surface of the sound insulation materials and generate tiny particles. The bacteria or molds generated by the sound insulation materials due to their water absorption may also cause the decomposition of the sound insulation materials and generate tiny particles. These tiny particles will ultimately be inhaled by the patients into the patient's airway, which is extremely detrimental to health. Some patients may also have an allergic reaction to the sound insulation materials, which may also lead to respiratory allergic reactions or asthma attacks, affecting respiratory health. These characteristics determine that the service life of sound insulation materials is usually short. Therefore, theoretically, they need to be replaced frequently to maintain the functional effectiveness of the sound insulation materials in the airway, or further research and processing of the sound insulation material materials to stabilize their physical and chemical properties, but both will increase the waste of use and production costs.

[0112] 3. The noise reduction structure of the present technology can achieve the regulatory noise level with less sound insulation material inside the airway. Compared with the airways in existing market ventilators that almost all have sound insulation materials, it improves the safety and service life of the device, and conforms to the environmental protection concept. The noise reduction structure of the present technology adopts a series of innovative designs, uses multiple high-efficiency noise reduction structures and is supported by theoretical and experimental data. The finally manufactured airway has obvious noise reduction effect and can still meet the strict regulatory requirements for noise without using sound insulation material inside the airway. The airway with less sound insulation material has the following advantages: a. Since placing sound insulation material inside the airway is the simplest, most effective and common means to achieve the regulatory noise level, almost all the airways in existing breathing-related devices on the market have sound insulation materials. However, the small particles decomposed by the sound insulation material are usually harmful to human health if inhaled by the human body, especially for ventilators that need to be used for a long time. b. The sound insulation material ages and deteriorates relatively quickly. Compared with plastic materials, it has the shortest service life among the components inside the airway. The service life of existing airways with sound insulation material inside will be shortened due to the existence of the sound insulation material. In the present technology, patients can choose an airway with less sound insulation material, and the service life of the entire ventilator is improved by abandoning the sound insulation material. Moreover, the absence of sound insulation material means that the internal airway structure of the device is simpler, without the need for additional sound insulation material fixing structures, etc. By simplifying the internal structure of the device, mechanical losses and maintenance requirements are reduced, and the reliability and stability of the device are improved. c. As a common noise reduction material, although the sound insulation material can effectively reduce noise in the ventilator, it will have a certain impact on the environment during the manufacturing, use and disposal processes. First of all, as a synthetic material, the production of the sound insulation material consumes a large amount of energy and resources, and may involve the use of chemical substances, resulting in pollution. Secondly, high-quality sound insulation materials for noise reduction are usually relatively expensive. Using good noise reduction sound insulation materials reduces the risk to health while increasing the purchase cost of the device. The design of reducing the sound insulation material inside the airway avoids the occurrence of these problems. It not only reduces the negative impact on the environment, but also reduces the generation of waste, and at the same time saves the cost of purchasing the sound insulation material. d. The airway that can achieve the regulatory noise level by reducing the sound insulation material provides patients with more flexible choices. Patients can choose an airway with sound insulation material or an airway without sound insulation material inside. For some patients with higher requirements for quietness, they can choose an airway with sound insulation material to achieve lower noise and improve sleep quality. In addition to the sound insulation material, adding silicone and rubber that are harmless to health inside the airway can also reduce noise to a certain extent and eliminate the influence of the sound insulation material inside the airway. In contrast, materials such as silicone and plastic usually have better wear resistance, corrosion resistance and endurance, are less affected by the environment, and usually also have better chemical stability and are not easily affected by chemical factors, so their service life is longer.

[0113] 4. Use an effective noise reduction structure such as a containment cavity so that the device can still reach or even be lower than the noise level stipulated by regulations and be more stable under the condition of no auxiliary noise reduction materials that are prone to decomposition and deterioration. The device of the present utility model integrates a variety of structures that can effectively reduce noise, replacing the traditional airway using sound insulation materials. Specifically, the various noise reduction structures adopted by the present utility model include, but are not limited to, a containment cavity, a conical inlet pipe, a more reasonable placement form and position of the blower, an arc-shaped wall that forms a basic coaxiality with the blower inlet, and a form in which the inner wall of the gas passage facing the airflow path is rounded. The use of these structures and components can not only effectively reduce the noise level of the device, but more importantly, the noise reduction components in the airway of the device, the internal structure of the airway, and the relationship between the various structures are all based on sufficient existing and experimental data support and scientific analysis, ensuring the scientificity and credibility of the airway design, and improving the reliability and stability of the airway. This scientifically credible airway design not only improves the performance of the product, but also brings a quieter and more reliable user experience for patients.

[0114] 5. The structural design of the containment cavity makes the device reliable and extends the service life of the machine. The airway design without materials prone to decomposition and deterioration extends the service life of the device by using structures with more stable physical and chemical properties, so that the device can be used for a longer time. In addition, the design without materials prone to decomposition and deterioration can simplify the internal structure of the gas passage of the device, eliminating the need to design redundant structures to fix special materials, reducing the types of production components, and thus reducing the complexity of manufacturing and assembly, which helps to improve the reliability and stability of the device. At the same time, sound insulation materials often need to be replaced and cleaned in a timely manner to ensure health, and the sound insulation materials placed inside the device are often not replaceable and cleanable, while the design without sound insulation materials avoids these steps and reduces the maintenance requirements for the sound insulation materials inside the gas passage, improving the convenience of maintaining the machine. These two aspects make the respiratory-related equipment using this technology more competitive and more acceptable to the public in the same type of products.

[0115] 6. By using a simpler structure and material application, the cost of the machine is reduced and it conforms to the environmental protection concept. The airway design in this utility model device abandons traditional sound insulation materials and only uses plastic parts as the outer shell of the airway and as the materials for forming the chamber and the gas passage, and uses silicone materials as the connecting parts for fixing between the blower and the airway outer shell, thus reducing the cost for producers to purchase and manufacture sound insulation materials additionally. And compared with the structure with sound insulation materials inside the airway of the existing complex respiration-related equipment on the market, this airway composed of only two materials is easier to process and assemble, making its manufacturing process simpler and more efficient, saving a large amount of time and human resources. Moreover, good noise reduction and sound insulation materials are usually relatively expensive materials, increasing additional cost expenditures. In contrast, the airway design without sound insulation materials can significantly reduce these costs. In addition, reducing the use of auxiliary materials such as sound insulation materials also reduces the impact on the environment, conforming to the requirements and trends of modern society for environmental protection and making a positive contribution to environmental protection. Because sound insulation materials will release harmful chemical substances during production and processing, causing pollution to the environment. And adopting the airway design without sound insulation materials avoids the release of these harmful substances and reduces the negative impact on the environment. Therefore, this airway design that does not use sound insulation materials or materials that are easy to decompose and deteriorate and only uses silicone and plastic not only reduces the cost of the machine but also conforms to the environmental protection concept, and is a more sustainable and economical design solution.

Claims

1. A breathing-related device having a receiving cavity, configured to deliver pressurized breathable gas to a patient's respiratory tract, characterized in that, The device includes: A blower, including a motor with a rotor, at least one impeller disposed on the motor rotor, and a housing with an inlet and an outlet, the blower being configured to generate pressurized breathable gas; An air passage, including a wall with an air inlet and an air outlet, the wall forming at least two chambers; A housing, configured to accommodate the air passage; An electronic component, located between the housing and the air passage; Wherein, at least one of the at least two chambers is a receiving chamber, and at least one wall of the receiving chamber has at least one through-opening; Wherein, when the device is in use, the breathable gas basically does not pass through the receiving chamber.

2. The respiratory-related device according to claim 1, characterized in that, The chambers other than the receiving chamber are called flow chambers, and the blower is placed in the flow chamber.

3. The respiratory-related device according to claim 1, wherein The form of the wall of the receiving chamber is a plane.

4. The respiratory-related device according to claim 1, wherein The form of the wall of the receiving chamber is a curved surface.

5. The respiratory-related device according to claim 1, characterized in that, The air flow rate passing through the at least one receiving chamber is at most 20% of the overall air flow rate of the device.

6. The respiratory-related device according to claim 1, characterized in that, The through-opening in the receiving chamber is at least a circle with a diameter of 0.5 mm.

7. A breathing-related device having a receiving cavity configured to deliver pressurized breathable gas to a patient's respiratory tract, characterized in that, The device includes: A blower, including a motor with a rotor, at least one impeller disposed on the motor rotor, and a housing with an inlet and an outlet, the blower being configured to generate pressurized breathable gas; An air passage, including a wall with an air inlet and an air outlet, the wall forming at least two chambers; A housing, configured to accommodate the air passage; An electronic component, located between the housing and the air passage; Wherein, at least one of the at least two chambers is a receiving chamber, and the remaining chambers are flow chambers, and at least one wall of the receiving chamber has at least one through-opening; Wherein, except for the wall with the opening, the remaining walls of the receiving chamber are in a closed form; Wherein, the opening of the receiving chamber communicates with the flow chamber through a neck.

8. The breathing-related device according to claim 7, wherein The blower is placed in the flow chamber.

9. The respiratory-related device according to claim 7, wherein, The height of the neck is at least greater than 0.4 mm.

10. The respiratory-related device according to claim 7, characterized in that, The air flow rate passing through the at least one receiving chamber is at most 20% of the overall air flow rate of the device.

11. The respiratory-related device according to claim 7, wherein, The area of the through-opening in the accommodation cavity is at least 0.19625 mm 2 .

12. A breathing-related device having a receiving cavity, configured to deliver pressurized breathable gas to a patient's respiratory tract, characterized in that The device includes: A blower, including a motor with a rotor, at least one impeller disposed on the motor rotor, and a housing with an inlet and an outlet, the blower being configured to generate pressurized breathable gas; An air passage, including a wall with an air inlet and an air outlet, the wall forming at least two chambers; A housing, configured to accommodate the air passage; An electronic component, located between the housing and the air passage; Wherein, at least one of the at least two chambers is a receiving chamber, and the remaining chambers are flow chambers, and at least one wall of the receiving chamber has at least one through-opening; Wherein, the opening of the receiving chamber communicates with the flow chamber through a neck; Among them, the maximum cross-sectional area of the neck is at least 0.19625 mm 2 , and the height is at least equal to the wall thickness of the accommodation cavity.

13. The respiratory-related device according to claim 12, wherein, The air passage has a plurality of the receiving chambers.

14. The respiratory-related device according to claim 12, wherein The ratio of the height of the neck to the height of the receiving chamber is at least 1:

300.

15. The respiratory-related device according to claim 12, characterized in that, The maximum cross-section of the neck includes an irregular shape.

16. The respiratory-related device according to claim 12, wherein The wall thickness of the receiving chamber is at least 0.4 mm.

17. A breathing-related device having a receiving cavity, configured to deliver pressurized breathable gas to a patient's respiratory tract, characterized in that, The device includes: A blower, including a motor with a rotor, at least one impeller disposed on the motor rotor, and a housing with an inlet and an outlet, the blower being configured to generate pressurized breathable gas; An air passage, including a wall with an air inlet and an air outlet, the wall forming at least two chambers; A housing, configured to accommodate the air passage; An electronic component, located between the housing and the air passage; Among them, at least one of the at least two chambers is a receiving chamber, and the remaining chambers are flow chambers. At least one wall of the receiving chamber has at least one through opening; Among them, the total volume of the accommodation cavity is not less than 785 mm 2 .

18. The respiratory-related device according to claim 17, wherein, The air passage of the device has a plurality of the receiving chambers.

19. The respiratory-related device according to claim 17, wherein, The receiving chamber communicates with the flow chamber through a neck.

20. The respiratory-related device according to claim 19, wherein The height of the neck is at least greater than 0.4 mm.

21. The respiratory-related device according to claim 19, wherein, The surface area of the receiving chamber is at most 1000 times the cross-sectional area of the neck.

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