Noise reduction airway equipment applied to field of breathing machines

Abstract

Noise reduction airway equipment applied to the field of breathing machines comprises a shell, the shell is provided with an inner wall and an outer wall, at least one gas inlet and at least one gas outlet are further formed in the shell, and a gas channel of the noise reduction airway equipment is formed in the space where airflow flows through from the inlet to the outlet. The gas passage forms at least one chamber, and the blower is disposed in the chamber as a core component within the noise reduction airway apparatus. An inlet pipe is arranged at the gas inlet, and an outlet pipe is arranged at the gas outlet. In addition, no foam exists in the gas channel.

Description

Technical Field

[0001] The utility model is a noise reduction airway device used in a breathing-related device for improving or treating sleep apnea, wherein the gas channel is also provided with a blower core component for providing power for the noise reduction airway device. Background Art

[0002] Sleep is a vital physiological process for maintaining physical and mental health, but when night falls, snoring becomes the norm for many people. The noise of snoring not only makes it difficult for co-sleepers to fall asleep, but also poses a potential threat to the health of the snorer. Data shows that more than 40% of adults snore at least occasionally, and some of them may face problems such as obstructive sleep apnea (OSA). Not all people who snore have OSA, but most people who snore have OSA or OSA-related diseases, especially high blood pressure, heart disease, stroke, acid reflux, atrial fibrillation (abnormal heart rhythm), depression and diabetes.

[0003] Current treatments for sleep apnea are broadly categorized as non-surgical and surgical. Non-surgical treatment involves using a home CPAP machine to deliver air through the patient's nose or mouth to provide continuous positive airway pressure. This is currently the most effective non-surgical treatment for sleep apnea. This method prevents passive collapse of soft tissues during inspiration and stimulates mechanoreceptors in the genioglossus muscle, increasing airway tension and making breathing easier. However, it requires the patient to use a home CPAP machine continuously for a long period of time. In the United States, in particular, most patients achieve satisfactory results with home CPAP therapy. In addition to using a CPAP machine to treat sleep apnea, patients can also choose to wear various appliances that elevate the soft palate during sleep, actively or passively pull the tongue forward, or directly advance the mandible to widen the oropharynx and hypopharynx to improve breathing. This approach is suitable for patients with mild to moderate symptoms but is ineffective for severe cases. Oxygen inhalation and various medications, such as neurorespiratory stimulants, are also adjunctive treatment options. In some special cases, surgery may also be considered. The forms of surgery include nasal surgery, glossoplasty, uvula, palatoplasty, and pharyngoplasty (UPPP), and orthognathic surgery. The purpose of surgical treatment is to reduce and eliminate airway obstruction and prevent collapse of the soft tissue of the airway. The choice of surgical method should be determined based on the location and severity of the airway obstruction, whether there is morbid obesity, and the overall condition. In daily life, patients can also alleviate symptoms by paying attention to diet, exercise, psychological care, correcting diet and lifestyle habits, reducing their body weight by 5% to 10% within a specified time, quitting smoking and drinking, avoiding the use of sedatives before sleep, controlling sleeping posture, avoiding supine position, etc., which can also relieve symptoms.

[0004] It has been observed that non-surgical treatment, especially continuous positive airway pressure ventilation, is the most popular and effective treatment option among various treatment methods. This treatment method provides positive pressure airflow to the patient's airway to prevent the airway from collapsing. Among them, the fully automatic sleep apnea treatment device can also automatically adjust the air supply pressure according to the individual's breathing state during sleep, so that the upper airway can be opened according to the patient's breathing. In addition, there are also bi-level ventilators and mono-level ventilators on the market, which are suitable for patients with mild, moderate and severe sleep apnea. Utility Model Content

[0005] The objective of the present invention is to provide a novel noise reduction airway device for use in the field of ventilators, so that in addition to achieving a noise reduction level, the health and safety of patients can be guaranteed, which is more conducive to the manufacture of noise reduction airway devices and enables the noise reduction airway devices to quickly adapt to the market. The noise reduction airway device without internal foam can be used by patients for a long time and a longer period of time, and overcomes the limitations of similar products in the existing technology, thereby providing a more effective and more widely used application scenario and space than the existing technology, and supplying continuous positive pressure airflow to the patient's airway in a safer processing method to provide treatment for sleep breathing disorders.

[0006] A noise reducing airway device for use in a respiratory-related apparatus, configured to pressurize gas and provide the pressurized gas to a patient's respiratory tract, the noise reducing airway device comprising:

[0007] a blower having an air inlet and an air outlet, configured to generate a pressurized gas flow;

[0008] a housing having at least one gas inlet for receiving gas, at least one gas outlet for allowing gas to flow out, an inner wall, and an outer wall;

[0009] a gas passage, a space enclosed by the inner wall of the housing, configured to allow gas to flow, the gas passage forming at least one chamber in the inner wall, and the sum of the volumes of the chambers being greater than three times the volume of the blower;

[0010] wherein the gas outlet is provided with an outlet pipe configured to be connected to the gas outlet and communicate with the blower outlet;

[0011] There is no foam in the gas channel.

[0012] In one embodiment, the gas channel forms a first chamber and a second chamber.

[0013] In one embodiment, the volume of the first chamber is greater than the volume of the second chamber.

[0014] In one embodiment, the gas inlet axis is parallel or perpendicular to the blower air inlet axis path.

[0015] In one embodiment, the gas inlet has an inlet pipe, which is configured to be connected to the housing and has a taper.

[0016] In one embodiment, the housing forms part of a breathing-related device.

[0017] In one embodiment, the housing of the noise reduction airway device is made of one of polypropylene PP, polycarbonate PC, polyethylene terephthalate-1,4-cyclohexanedimethanol PCTG, polyamide PA, and polyetheretherketone PEEK.

[0018] The present invention also discloses a noise reduction airway device for use in a respiratory-related device according to an embodiment of the present application, configured to pressurize gas and provide the pressurized gas to the patient's respiratory tract, the noise reduction airway device comprising:

[0019] a blower having an air inlet and an air outlet, configured to generate a pressurized gas flow;

[0020] a housing having at least one gas inlet for receiving gas, at least one gas outlet for allowing gas to flow out, an inner wall, and an outer wall;

[0021] a gas passage, a space enclosed by the inner wall of the housing, configured to allow gas to flow, the gas passage forming at least one chamber in the inner wall, and the sum of the volumes of the chambers being greater than three times the volume of the blower;

[0022] The gas outlet has an outlet pipe, which is configured to be connected to the gas outlet and communicate with the blower outlet, and the outlet pipe has at least one of the following characteristics:

[0023] a. The outlet pipe has at least one wall section coaxial with the axis of the blower outlet;

[0024] b. The length of the outlet pipe is greater than or equal to the diameter of the blower outlet;

[0025] c. The opening area of ​​the outlet pipe is 75%-125% of the blower outlet area;

[0026] There is no foam in the gas channel.

[0027] In one embodiment, the outlet pipe has a wall section coaxial with the axis of the blower outlet near the blower outlet, and the length of the wall section is greater than or equal to 6 mm.

[0028] In one embodiment, the gas inlet has an inlet pipe.

[0029] In one embodiment, the distances between the center of the blower air inlet and the inner wall of the shell are approximately equal.

[0030] In one embodiment, the housing has a wall proximate the blower air inlet that is substantially coaxial with the blower air inlet.

[0031] In one embodiment, the outlet pipe is made of a material selected from the group consisting of plastic, silicone, rubber, TPE, TPU, and fluororubber.

[0032] In one embodiment, the housing forms part of a breathing-related device.

[0033] The present invention also discloses a noise reduction airway device for use in a respiratory-related device, provided in an embodiment of the present application, configured to pressurize gas and provide the pressurized gas to the patient's respiratory tract, the noise reduction airway device comprising:

[0034] a blower having an air inlet and an air outlet, configured to generate a pressurized gas flow;

[0035] a housing having at least one gas inlet for receiving gas, at least one gas outlet for allowing gas to flow out, an inner wall, and an outer wall;

[0036] a gas passage, a space enclosed by the inner wall of the housing, configured to allow gas to flow, the gas passage forming at least one chamber in the inner wall, and the sum of the volumes of the chambers being greater than three times the volume of the blower;

[0037] The gas inlet has an inlet pipe, which is configured to have an inlet end connected to the shell and an outlet end for outflowing gas, and the inlet pipe has at least one of the following characteristics:

[0038] a. The straight-line distance from the center of the outlet end of the inlet pipe to the center of the blower inlet is

[0039] 35mm-150mm;

[0040] b. The ratio of the inlet pipe length to the distance from the center of the inlet pipe outlet to the center of the blower inlet is in the range of 0.16-2.29;

[0041] The distance between the blower air inlet and the inner wall of the housing is greater than 5 mm.

[0042] There is no foam in the gas channel.

[0043] In one embodiment, the inlet pipe is located at an edge portion of the gas channel.

[0044] In one embodiment, a transition component is provided between the gas outlet and the blower outlet to connect the two and prevent gas leakage.

[0045] In one embodiment, the noise reduction air duct device comprises a first chamber, a second chamber, and a wall separating the first chamber from the second chamber, wherein the wall has an opening and is configured to communicate with the blower air inlet.

[0046] In one embodiment, the gas outlet axis is not located on the horizontal plane where the inlet pipe axis is located.

[0047] In one embodiment, the noise reducing airway device does not include any components made of polymer foam material.

[0048] In one embodiment, the housing forms part of a breathing-related device.

[0049] The present invention also discloses a noise reduction airway device for use in a respiratory-related device according to an embodiment of the present application, which is configured to pressurize gas and provide the pressurized gas to the patient's respiratory tract. The noise reduction airway device includes:

[0050] a blower having an air inlet and an air outlet, configured to generate a pressurized gas flow;

[0051] a housing having at least one gas inlet for receiving gas, at least one gas outlet for allowing gas to flow out, an inner wall, and an outer wall;

[0052] a gas channel, a space formed by the inner wall of the housing and allowing gas to flow through, the gas channel forming at least one chamber;

[0053] The gas inlet has an inlet pipe configured to have an air inlet end connected to the housing and an air outlet end for outflowing gas, and the area enclosed by the wall of the air inlet end of the inlet pipe is not less than 75% of the area of ​​the air inlet of the blower;

[0054] Wherein, the gas inlet and the gas outlet are not on the same wall;

[0055] There is no foam in the gas channel.

[0056] In one embodiment, the gas inlet end of the inlet pipe has a trumpet-shaped elastic body configured to smoothly guide the gas into the chamber.

[0057] In one embodiment, the distance between the blower air inlet and the inner wall of the housing opposite thereto is greater than 5 mm.

[0058] In one embodiment, the distance between the air outlet end of the inlet pipe and the inner wall of the housing opposite thereto is greater than 1.5 times the diameter of the air inlet end thereof.

[0059] In one embodiment, the inlet pipe has a draft angle and the draft angle is greater than or equal to 1.5°.

[0060] In one embodiment, the gas inlet and the gas outlet are not coaxial.

[0061] In one embodiment, the housing forms part of a breathing-related device.

[0062] The noise reduction airway device of the present utility model has at least the following beneficial effects:

[0063] 1) Almost all respiratory devices currently on the market use foam within the air passages for noise reduction. However, foam is highly susceptible to health concerns for several reasons: ① Because foam is soft and has a relatively loose surface, it can be easily abraded or peeled off by airflow during use, releasing particles. Once released, these particles can easily enter the patient's airway with the airflow, irritating the respiratory system. This can cause respiratory problems, leading to symptoms such as sore throat and coughing, especially for those with pre-existing respiratory conditions such as asthma or chronic obstructive pulmonary disease (COPD). ② Furthermore, foam is often made from synthetic materials, which may contain residual chemical additives. These chemicals are gradually released as the foam ages and is used. In some cases, if the foam particles carry harmful microorganisms, this can lead to potential infection, especially for those with weakened immune systems. Foam particles can also trigger allergic reactions, including sneezing, flu, and eye irritation. ③ Furthermore, prolonged use of foam can accumulate dust, bacteria, and other contaminants. This is especially true for the foam in respiratory devices, which can easily absorb airborne contaminants, leading to bacterial growth and increasing the risk of infection.

[0064] This technology's design prioritizes the safety and reliability of the ventilator's noise-reduction airway device, incorporating a series of stringent safety measures, including a foam-free design. This approach mitigates potential health risks to patients while using a ventilator. The gas passageway and filtration system utilize foam-free or easily replaceable foam to mitigate these potential health risks. For patient health and safety, this technology utilizes a foam-free design for the gas passageway. The absence of foam reduces the potential for accumulation of microscopic foreign matter, helping to maintain cleanliness. More importantly, the exhaled air is unaffected by tiny foam residue, reducing the amount of particles the patient may inhale or be exposed to, ensuring device safety. This is particularly important for patients who use the device for extended periods, as it helps reduce potential respiratory issues. Furthermore, some patients may be allergic to particles from materials such as foam, and the foam-free design reduces the risk of allergic reactions. This is also crucial for patients with allergies to foam or chemically treated materials. Extensive testing has proven that this foam-free noise-reduction airway device improves patient safety and comfort.

[0065] 2) The design of the foam-free noise reduction airway equipment makes the noise reduction airway equipment more reliable and extends the service life of the device. Foam is usually made of synthetic materials such as polyurethane and polyether. It is softer than plastic and silicone and is susceptible to mechanical damage and chemical erosion. It is extremely susceptible to aging due to the influence of the external environment, and the foam material usually contains some chemical additives or ingredients that cause the performance of the foam to change. These characteristics determine that the foam material has a short service life, so in theory it needs to be replaced frequently to maintain the functional effectiveness of the foam in the noise reduction airway equipment. In contrast, materials such as silicone and plastic usually have better wear resistance, corrosion resistance and endurance, and are less affected by the environment. In addition, materials such as silicone and plastic usually have good chemical stability and are not easily affected by chemical factors, so their service life is longer. The design of the foam-free noise reduction airway equipment extends the service life of the noise reduction airway equipment by removing the foam, thereby extending the service life of the device. In addition, the foam-free design can simplify the internal structure of the device's gas channel. There is no need to design extra structures to fix the foam, which reduces the number of components and thus reduces the complexity of manufacturing. This helps to improve the reliability and stability of the device. At the same time, foam materials often need to be replaced and cleaned in a timely manner to ensure health. The foam placed inside the device often cannot be replaced or cleaned. The foam-free design avoids these steps, reduces the maintenance requirements of the foam inside the gas channel, and improves the convenience of using the device.

[0066] 3) Use effective noise reduction structures so that the noise reduction airway equipment can still reach the noise level specified by the regulations without the help of foam to reduce noise. This noise reduction airway equipment utilizes various structures that can effectively reduce noise, replacing the role of traditional foam in the noise reduction airway equipment. Specifically, the various noise reduction structures adopted by this technology include but are not limited to a conical inlet pipe, a trumpet-shaped elastomer made of elastic material, a more reasonable placement of the blower, an arc-shaped wall that constitutes the air flow entering the blower air inlet and is basically coaxial with the blower air inlet, and a rounded form of the inner wall of the gas channel opposite to the air flow path. The use of these structures and components can not only effectively reduce the noise level, but also improve the stability and reliability of the noise reduction airway equipment. More importantly, the noise reduction components in these noise reduction airway equipment and the internal structure of the noise reduction airway equipment and the relationship between the various structures are all based on sufficient experimental data support and scientific analysis, ensuring the scientificity and credibility of the design of the noise reduction airway equipment and improving the reliability and stability of the noise reduction airway equipment. This scientifically proven noise-reducing airway device design not only improves product performance, but also provides patients with a quieter and more reliable user experience.

[0067] 4) This technology reduces device costs and is environmentally friendly through its simpler structure and materials. The noise-reducing airway device design eliminates traditional foam materials, using only plastic for the device's housing and chamber and channel construction, and silicone for the connectors securing the blower to the device's housing. Compared to existing complex ventilator noise-reducing airway devices with internal foam, this two-material design is easier to process and assemble, making the manufacturing process simpler and more efficient. Furthermore, the reduced use of auxiliary materials, such as foam, also reduces environmental impact, aligning with modern society's environmental protection requirements and trends and making a positive contribution to environmental protection. Foam releases harmful chemicals during production and processing, causing environmental pollution. A foam-free design avoids these releases and reduces negative environmental impacts. Therefore, this foam-free design, using only silicone and plastic, reduces device costs while also aligning with environmental protection, making it a more sustainable and economical design. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Figure 1 A three-dimensional schematic diagram of the internal structure of a noise reduction airway device in a first embodiment of the present invention;

[0069] Figure 2 This is a three-dimensional schematic diagram of the housing of a noise reduction airway device in a form of embodiment 1 of the present invention;

[0070] Figure 3A top view of the internal structure of a noise reduction airway device in a form of embodiment 1 of the present invention;

[0071] Figure 4 This is a disassembled view of the housing of a noise reduction airway device in a form of embodiment 1 of the present utility model;

[0072] Figure 5 A three-dimensional schematic diagram of a blower of a noise reduction air duct device in a form of embodiment 1 of the present invention;

[0073] Figure 6 This is a three-dimensional schematic diagram of a transition component in a first embodiment of the present invention used in a noise reduction airway device;

[0074] Figure 7 This is an exploded view of the structure of a noise reduction airway device in a form of embodiment 1 of the present invention;

[0075] Figure 8 This is an airflow path diagram of a noise reduction airway device in a form of embodiment 1 of the present invention;

[0076] Figure 9 This is a schematic diagram of multiple angle and multiple tests of a noise reduction airway device in a form of embodiment 1 of the present invention;

[0077] Figure 10 A schematic diagram of the length of the inlet pipe of a noise reduction air duct device in a form of embodiment 1 of the present invention and the distance from the center of the air outlet end of the inlet pipe to the center of the air inlet of the fan;

[0078] Figure 11 This is a schematic diagram of the distance between the outlet end of the inlet pipe of a noise reduction airway device in a form of embodiment 1 of the present utility model and the wall;

[0079] Figure 12 A schematic diagram of the inlet pipe taper of a noise reduction airway device in a form of embodiment 1 of the present invention;

[0080] Figure 13 This is a schematic diagram of the airflow path of the noise reduction air duct device in a form of embodiment 1 of the present invention before the gas enters the blower;

[0081] Figure 14 A schematic diagram of a blower air inlet with uniform vertical and horizontal spacing of a noise reduction air duct device in a first embodiment of the present invention;

[0082] Figure 15 This is a schematic diagram of a noise reduction airway device in a form of embodiment 1 of the present invention, wherein the inlet pipe, air inlet pipe and housing are not integrally formed;

[0083] Figure 16This is a three-dimensional schematic diagram of another embodiment of the present invention, in which the inlet pipe is arranged in the chamber;

[0084] Figure 17 This is a three-dimensional schematic diagram of a noise reduction airway device without an inlet pipe according to another embodiment of the first embodiment of the present invention;

[0085] Figure 18 A three-dimensional schematic diagram of a noise reduction airway device with different internal structures in Example 2 of the present utility model;

[0086] Figure 19 A three-dimensional schematic diagram of another noise reduction airway device with a different internal structure in Example 2 of the present utility model;

[0087] Figure 20 A three-dimensional schematic diagram of another noise reduction airway device with a different internal structure in Example 2 of the present utility model;

[0088] Figure 21 This is a three-dimensional schematic diagram of another embodiment of Example 3 of the present invention, in which a protruding guide vane or an external baffle structure in the chamber forms a wall substantially coaxial with the blower air inlet;

[0089] Figure 22 This is a three-dimensional schematic diagram of a noise reduction airway device having a trumpet-shaped elastic body at the gas inlet in Example 4 of the present utility model;

[0090] Figure 23 A three-dimensional schematic diagram of a noise reduction airway device according to a fifth embodiment of the present invention having sound insulation material other than foam;

[0091] Figure 24 This is a schematic diagram of the analysis of the airflow direction inside the noise reduction airway device in Example 1 of the present utility model;

[0092] Figure 25 A three-dimensional schematic diagram of a portion of a respiratory-related device comprising a housing of the noise reduction airway device in a sixth embodiment of the present invention;

[0093] Figure 26 This is a cross-sectional view of the portion of the breathing-related device composed of the housing of the noise reduction airway device according to the sixth embodiment of the present invention. DETAILED DESCRIPTION

[0094] To facilitate understanding of the utility model, the utility model will be described more fully below with reference to the accompanying drawings. The drawings illustrate exemplary embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the utility model.

[0095] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention pertains. The terms used in the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention.

[0096] The utility model is aimed at the existing noise reduction airway devices used in the field of ventilators on the market, which all use foam for noise reduction treatment. In view of the fact that the foam used for noise reduction in this way is easily damaged and aged, is not conducive to the health and safety of patients, and the manufacturing and processing steps are more complicated and not conducive to environmental protection, the utility model provides a safer, more reliable and simpler noise reduction airway device. The noise reduction airway device designed by the utility model not only optimizes the various disadvantages of the existing design, but also makes the noise reduction airway device reach the noise level specified by regulations. It is a better technical utility model for patients, producers and the market. The utility model chooses not to use foam inside the noise reduction airway device, which is also a sustainable and environmentally friendly design for the environment.

[0097] The following describes several structures of the noise reduction airway device of the present invention applied in the field of ventilators with reference to specific examples.

[0098] The following terms appearing in the embodiments are now explained:

[0099] Substantially, approximately, roughly: In some forms of this technology, terms such as substantially, approximately, and roughly mean a value within a range of 15 percent above or below the original value.

[0100] Air: In some forms of this technology, air may be considered to refer to the air we breathe, and in other forms of this technology, air may be considered to refer to other gases or combinations of gases that can be used for breathing, such as atmospheric air that is richer in oxygen.

[0101] Environment: In some forms of the present technology, the environment may be considered to refer to the exterior of the noise reducing airway device housing not surrounding the blower, and in other forms of the present technology, the environment is considered to be the surroundings where the patient is located.

[0102] Example 1

[0103] This embodiment provides a noise reduction airway device 1 for use in the field of ventilators. This embodiment provides a three-dimensional structural schematic diagram, a top view, an exploded and disassembled view, an airflow path diagram, a test scene diagram, and various data schematic diagrams of the noise reduction airway device 1. Figure 1-15. This embodiment relates to a noise reduction airway device 1 used in a respiratory-related device, which is configured to pressurize gas and provide the pressurized gas to the patient's respiratory tract. The noise reduction airway device 1 includes a shell 2 having an inner wall 23 and an outer wall 24, a gas inlet 21 and a gas outlet 22 on the shell 2, a gas channel 3 without foam, a chamber 31, a blower 4, an inlet pipe 211 and an outlet pipe 221. The device is configured to be assembled with other components such as a circuit board to form an integral respiratory system-related treatment device, and is used to blow the pressurized gas from the blower 4 into the patient's airway in a certain sequence, thereby preventing the patient's airway from collapsing.

[0104] The noise-reducing air duct device 1 includes a blower 4 having an air inlet 41 and an air outlet 42, configured to generate a pressurized gas flow. The blower 4 can be positioned within the gas duct 3 with its air inlet 41 parallel to the horizontal plane or perpendicular to the horizontal plane. In this embodiment, the blower 4 is located substantially centrally within the gas duct 3, which aids in balancing the noise-reducing air duct device 1. Alternatively, the blower 4 can be positioned closer to the edge of one of the walls of the housing 2.

[0105] The noise-reducing airway device 1 also includes a housing 2 having at least one gas inlet 21 for receiving gas, at least one gas outlet 22 for allowing gas to flow out, an inner wall 23, and an outer wall 24. The gas inlet 21 on the housing 2 is configured to draw air from the external environment to provide gas to the blower 4 for pressurization. One end of the gas outlet 22 is connected to the air outlet 42 of the blower 4, and the other end is connected to a hose or a channel on the device housing 2. The gas inlet 21 and the gas outlet 22 are not located on the same wall, and the axis of the gas outlet 22 is not located on the same horizontal plane as the axis of the inlet pipe 211. That is, there is a height difference between the gas outlet 22 and the inlet pipe 211 (the gas inlet 21 and the gas outlet 22 are at different heights in the vertical direction). This helps to provide a more noise-reducing environment for respiratory-related devices. Because the suction and air supply of the blower 4 both generate a certain amount of noise, the noise at the blower air inlet 41 is greater than the noise at the air outlet 42. Therefore, locating the gas inlet 21 and gas outlet 22 on two walls of the housing 2 effectively reduces noise emitted from the gas inlet 21, directing the noise as far away from the patient as possible, and effectively preventing the superposition of noise from the gas inlet 41 and gas outlet 42. In one embodiment, the gas inlet 21 and the gas outlet 22 are not coaxial. This approach also distances the patient from the noise source, reducing ear noise. If the gas passage 3 forms at least two chambers 31, the housing 2 of the noise reduction airway device 1 further includes walls separating the chambers 31.

[0106] The gas channel 3, a space enclosed by the inner wall 23 of the housing 2, is configured to allow gas to circulate. The gas channel 3 forms at least one chamber 31 within the inner wall 23. In some cases, there are at least two chambers 31, i.e., the gas channel 3 forms at least a first chamber 311 and a second chamber 312. The larger the volume of the chamber 31, the less resistance the gas experiences when moving therein, which can reduce the likelihood of turbulence within the chamber. However, if the volume of the gas channel 3 is too large, the larger chamber 31 creates more dead space, preventing the gas from circulating effectively, thereby reducing the gas flow rate and increasing noise. After multiple tests of various volume ratios between the chambers 31 and the blower 4, it was concluded that a gas channel 3 with a noise reduction function is more effective when the sum of the volumes of the chambers 31 is greater than three times the volume of the blower 4, preferably 3-16 times. Furthermore, when the gas channel 3 forms at least two chambers 31, the noise reduction airway device 1 includes a first chamber 311, a second chamber 312, and a wall separating the first chamber 311 from the second chamber 312, the wall having an opening and configured to communicate with the air inlet 41 of the blower 4. The volume of the first chamber 311 is greater than the volume of the second chamber 312. More specifically, the blower 4 is located in the first chamber 311 and the blower air inlet 41 is connected to the second chamber 312, wherein in order to ensure that there is enough space for the gas in the second chamber 312 so that the gas can smoothly enter the interior of the blower 4, the blower air inlet 41 is set to be greater than 4 mm away from the wall separating the chamber 31 in the noise reduction air duct device 1, and the blower air inlet 41 is set to be greater than 5 mm away from the inner wall 23 of the shell 2 opposite to it, preferably 10 mm. Since the blower 4 will generate vibrations during operation, when the vibrations are transmitted from the blower 4 to the shell 2 of the noise reduction air duct device 1, the hard material of the shell 2 cannot offset and alleviate the vibrations, that is, a large noise will be generated. Therefore, in some cases, a flexible material such as silicone can be provided on the opening so that the vibrations of the blower 4 are not directly transmitted to the shell 2 of the noise reduction air duct device 1 to achieve the effect of shock absorption and noise reduction. Before the airflow enters the blower 4 from the chamber 31, it usually has a main flow path. Setting the direction of the airflow path entering the blower 4 to be the same as the rotation direction of the blower 4 impeller can effectively reduce the collision of the airflow, thereby making the noise reduction air duct device 1 quieter. There are also certain requirements for the placement of the blower 4 in the noise reduction air duct device 1. The distance from the blower air inlet 41 to the inner wall 23 of the shell 2 is roughly equal (such as Figure 14As shown), the blower air inlet 41 is located at the basic center of the chamber 31 in which it is located, which is conducive to the airflow flowing into the blower 4 evenly through the opening. The inner wall position opposite to the airflow path in the gas channel 3 is provided with a rounded corner, that is, the intersection of the two sides of the inner wall 23 of the shell 2 has a large rounded corner, so that the interior of the gas channel 3 presents an overall rounded form. This method avoids the violent collision of the airflow with the wall inside the gas channel 3, and also guides the flow direction of the gas. The path of the airflow in the entire gas channel 3 is to first enter the chamber 31 through the inlet pipe 211, flow along the flow path set in the chamber 31, and in some cases, include entering the second chamber 312 from the opening of the first chamber 311 to the second chamber 312, and then entering the blower 4 through the opening. After being pressurized by the blower 4, it reaches the outlet pipe 221 through the air outlet 42 of the blower 4. From a top view, the airflow path has at least one section of staggered form, and in some cases, the axis of the gas inlet 21 is parallel or perpendicular to the axis of the blower air inlet 41, and the noise reduction airway device 1 forms a spatial airflow path. Specifically, the airflow path formed by the gas inlet 21, the chamber 31, the blower 4 and the gas outlet 22 is in the form of extending in space rather than extending on the same plane, that is, the airflow has at least one section of a vertical flow path in the gas channel 3 (such as Figure 8 As shown). Furthermore, the gas passage 3 is free of foam. The foam herein refers to a foam material made of a polymer foam material, including polyurethane foam, polyester foam, polyether foam, chloroprene rubber, cross-linked polyethylene, or one or more of polyvinyl chloride (PVC), polyetherimide (PEI), acrylonitrile-styrene (SAN or AS), polymethacrylimide (PMI), and expanded polyester (PET). The housing 2 of the noise reduction airway device 1 is made of one of polypropylene (PP), polycarbonate (PC), polyethylene terephthalate (PCTG), polyamide (PA), and polyetheretherketone (PEEK).

[0107] The gas inlet 21 includes an inlet pipe 211 and an outlet pipe 221 connected to the gas outlet 22 and in communication with the blower outlet 42. The inlet pipe 211 is configured to have an air inlet end connected to the housing 2 and an air outlet end for outflowing gas. Both the inlet pipe 211 and the outlet pipe 221 are configured to be connected to the housing 2. The connection between the inlet pipe 211 and the outlet pipe 221 and the housing 2 can be either integrally connected to the housing 2 or non-integrally connected to the housing 2. Generally, the cross-section of the inlet pipe 211 is concentrically circular. In some cases, the cross-section of the inlet pipe 211 can also be a quadrilateral, hexagonal, or other suitable shape. Among them, the inlet pipe 211 is configured to be connected to the shell 2 and constitute a path for gas to enter the gas channel 3 from the external environment. The inlet pipe 211 is located at the edge of the gas channel 3 (away from the outside of the center point of the noise reduction airway device) and is isolated from the internal chamber 31, which can avoid unnecessary flow of gas in the gas channel 3, such as preventing gas from flowing into the small gap between the inlet pipe 211 and the inner wall 23 of the shell 2, thereby causing noise (such as Figure 16 As shown). In order for the inlet pipe 211 to be able to effectively gather and organize the airflow entering the noise reduction air duct device 1, requirements are made on the length of the inlet pipe 211. It can be concluded from the above paragraph that the volume of the gas channel 3 is 3-16 times the volume of the blower 4 for the best, so the intake pipe length is calculated by using three times and sixteen times the volume of the gas channel 3. For the inlet pipe 211 with a circular cross-section, the pressure gradient of the fluid therein can be calculated by the formula l=ρL / A, where L is the length of the inlet pipe 211, ρ is the air density, and A is the cross-sectional area of ​​the inlet pipe 211. In this way, the noise of the gas can be estimated in combination with its pressure, and the inlet pipe 211 can be as long as possible. Under the premise of not touching the wall of the outer shell 2 and blocking its outlet end, the formula shows that its length range is 25mm-80mm (as shown in FIG. Figure 10 In order to prevent the airflows from affecting each other, the distance from the outlet end of the inlet pipe 211 to the air inlet 41 of the blower is also specified. The volume of the gas channel 3, which is 16 times the volume of the blower 4, is used to calculate the distance from the center of the outlet end of the inlet pipe 211 to the center of the air inlet 41 of the blower (as shown in D1 in FIG). Figure 10 (as shown in D2 in the figure): The volume of the gas channel 3, which is 16 times the volume of the blower 4, is calculated to be 2118928mm 3, and the average length of each side is 128.4mm. Assuming that the blower 4 and the inlet pipe 211 are both at the edge to calculate the distance, the volume of the blower 4 is determined, and assuming that the center of the blower air inlet 41 is 8.4mm away from the top, the vertical distance between the center of the blower air inlet 41 and the center of the air outlet end of the inlet pipe 211 is the total length minus the distance from the top, which is 120mm. The distance from the center of the blower air inlet 41 to the side wall is 38.4mm, so the horizontal distance between the center of the blower air inlet 41 and the center of the air outlet end of the inlet pipe 211 is the total length minus the distance to the side, which is 90mm. Finally, the Pythagorean theorem is used to calculate that the actual distance between the center of the blower air inlet 41 and the center of the air outlet end of the inlet pipe 211 is 150mm. Similarly, the value obtained by calculating three times the marginal value of the volume is 35 mm, and the straight-line distance range from the center of the air outlet end of the inlet pipe 211 to the center of the air inlet 41 of the blower is 35 mm-150 mm. From the length range of the inlet pipe 211 and the distance between the center of the air inlet 41 of the blower and the center of the air outlet end of the inlet pipe 211 obtained by the above calculation, it can be concluded that the ratio of the length of the inlet pipe 211 to the distance from the center of the air outlet end of the inlet pipe 211 to the center of the air inlet 41 of the blower is in the range of 0.16-2.29. In addition, under normal circumstances, there is an inlet pipe 211 at the gas inlet 21, and the inlet pipe 211 is configured to be connected to the housing 2 and has a taper 2111, and the inlet pipe 211 has a draft angle and the draft angle is greater than or equal to 1.5°, preferably 1.5°-3° (such as Figure 12 As shown in ∠α2111 in the figure). The design of the taper 2111 reduces the occurrence of turbulence and eddy currents in the gas channel 3, making the gas flow in the noise reduction airway device 1 smoother. The design of the inlet pipe 211 from wide to narrow accelerates the airflow in the pipe, reducing the time the airflow stays in the inlet pipe 211, so that the gas will not generate excessive pressure in the pipe and cause greater noise. In order to ensure that the gas will not cause excessive pressure on the wall of the channel after entering the gas channel 3 through the inlet pipe 211, the distance between the outlet end of the inlet pipe 211 and the inner wall 23 of the shell 2 opposite to it is designed to be greater than 1.5 times the diameter of its inlet end (as shown in the figure). Figure 11 (as shown by d1 in the figure). For example, if the diameter of inlet pipe 211 is 16 mm, the outlet end of inlet pipe 211 should be at least 24 mm from the inner wall 23 of housing 2. Furthermore, to ensure a normal air flow, the area of ​​the inlet end of inlet pipe 211 is also required to be no less than 75% of the area of ​​blower inlet 41.

[0108] The gas outlet 22 has an outlet pipe 221, which is configured to be connected to the gas outlet 22 and communicate with the gas outlet 42 of the blower 4 (directly or indirectly connected). In one case, a transition component 5 (such as a gas outlet 22 or a gas outlet 42) is provided between the gas outlet 22 and the gas outlet 42 of the blower 4 to connect the two and prevent gas leakage. Figure 6 As shown in ). The outlet pipe 221 has at least one section (can have one or more sections) of wall that is coaxial with the axis of the air outlet 42 of the blower 4, and the length of the outlet pipe 221 is greater than or equal to the diameter of the air outlet 42 of the blower 4, preferably more than 1.5 times. The outlet pipe 221 can be a pipe whose inner wall is in the same direction as the axis of the air outlet 42 of the blower 4; or it can be composed of at least three parts, specifically having at least two sections of inner wall in the same direction as the axis of the air outlet 42 of the blower 4, and the inner wall of the middle section of the two sections is not in the same direction as the axis of the air outlet 42 of the blower 4 (that is, the axes intersect). The outlet pipe 221 has a section of wall coaxial with the axis 2 of the air outlet 42 of the blower 4 near the air outlet 42 of the blower 4, and its length is greater than or equal to 6 mm. Furthermore, to ensure the noise reduction effect of the noise reduction airway device 1, the opening area of ​​the outlet pipe 221 is set to 75%-125%, preferably 85%-110%, of the area of ​​the air outlet 42 of the blower 4. To ensure smoother and smoother airflow from the blower 4 without speed fluctuations, the opening area is preferably set to 100%-110%. The outlet pipe 221 is made of a material selected from the group consisting of plastic, silicone, rubber, TPE, TPU, and fluoropolymer.

[0109] In another embodiment, the gas inlet 21 and the gas outlet 22 are arranged on the same horizontal plane.

[0110] In another embodiment, the inlet pipe 211 is disposed inside the gas channel 3 rather than being isolated from the internal chamber 31 (e.g., Figure 16 shown).

[0111] In another embodiment, the housing 2 of the noise reduction airway device 1 has only the gas inlet 21 but no inlet pipe 211 connected thereto (e.g. Figure 17 shown).

[0112] In another embodiment, the taper of the inlet pipe 211 may be the most basic draft taper required for demolding or no taper.

[0113] In another embodiment, the path of the gas flowing through the inlet pipe 211 and the path of the gas entering the blower 4 are non-parallel and non-vertical.

[0114] Example 2

[0115] This embodiment provides a noise reduction airway device 1 used in the field of ventilators. Figure 18 This embodiment provides a three-dimensional schematic diagram of the noise reduction airway device 1. Figure 18In the embodiment of the utility model shown, the difference from the noise reduction air duct device 1 in Example 1 is that the placement position of the blower 4 in the noise reduction air duct device 1 is different from that in Example 1. Specifically, the placement of the blower 4 in the noise reduction air duct device 1 can make the axis of its air inlet 41 perpendicular to the horizontal plane, or the axis of the air inlet 41 can be parallel to the horizontal plane, and the positional relationship of the first chamber 311 and the second chamber 312 into which the gas channel 3 is divided can be arranged up and down, or can be arranged on the same horizontal plane. The noise reduction air duct device 1 of this embodiment is that the axis of the air inlet 41 of the blower 4 is parallel to the horizontal plane and the first chamber 311 and the second chamber 312 are arranged on the same horizontal plane, and its airflow path is a basically planar path (the airflow does not flow obviously in the vertical direction), and when viewed from a top-down perspective, there is no interlacing of the airflow paths in the noise reduction air duct device 1.

[0116] In another embodiment, a noise reduction airway device 1 of a structure derived from Example 2 is formed, wherein the axis of the gas inlet 21 is parallel to the axis of the blower air inlet 41 (e.g. Figure 19 shown).

[0117] In another embodiment, another structure of the noise reduction airway device 1 is derived from Example 2, wherein the axis of the gas inlet 21 is perpendicular to the axis of the blower air inlet 41 (eg Figure 20 shown).

[0118] Example 3

[0119] This embodiment provides a noise reduction airway device 1 used in the field of ventilators, referring to Figure 21 This embodiment provides a three-dimensional schematic diagram of the noise reduction airway device 1. Figure 21In the embodiment of the present invention shown, based on the noise reduction air duct device 1 in embodiment one, it is further defined that: the noise reduction air duct device 1 has a wall substantially coaxial with the blower air inlet 41 near the blower air inlet 41 to guide the air flow (including circular and elliptical shapes). Specifically, the wall is located in the second chamber 312 that does not accommodate the blower 4. The wall can be connected to the wall near the blower air inlet 41 in the second chamber 312 (i.e., the wall separating the first chamber 311 and the second chamber 312), or it can be connected to the wall of the shell 2 away from the blower air inlet 41 (i.e., the inner wall of the shell 2 in contact with the outside air), and is integrally formed with the shell. The wall allows the air flow to enter the blower air inlet 41 along an arc path. When the gas enters the chamber 31 where the wall is located through the gas channel 3, the gas flows along the wall, so that the gas flow path is adjusted to the same direction of rotation of the impeller of the blower 4 before entering the interior of the blower 4. This design ensures that the airflow path is continuous before entering the blower 4 and after entering the internal gas channel 3 of the blower 4, which helps to improve the stability of the gas flow, reduce turbulence and noise, and thus further reduce the noise level of the noise reduction airway device 1.

[0120] In another embodiment, the wall of the air passage 3 of the noise reduction airway device 1 that is substantially coaxial with the blower air inlet 41 is an external baffle structure protruding from the chamber 31. The baffle structure is not integrally formed with the housing 2. The connection between the baffle and the housing 2 can be a physical connection such as a snap or hook, or a chemical connection such as glue or tape.

[0121] Example 4

[0122] This embodiment provides a noise reduction airway device 1 used in the field of ventilators, referring to Figure 22 This embodiment provides a three-dimensional schematic diagram of the noise reduction airway device 1. Figure 22In the embodiment of the present invention shown, building on the structure of the noise-reducing airway device 1 in Example 1, a trumpet-shaped elastic body 2211 is installed at the gas inlet 21 of the noise-reducing airway device 1. Because the wide-to-narrow channel structure is a proven and effective structure, this structure is separated into a trumpet-shaped structure and installed at the gas inlet 21. Elastic materials can absorb energy generated by vibration and sound waves, reducing noise generated by resonance. Therefore, this structure using elastic materials has a more significant noise reduction effect than structures made of hard materials. This structure, made of elastic material and installed at the gas inlet 21, provides secondary noise reduction, reducing noise by at least 0.5 decibels compared to the structure in Example 1. The gas inlet 21 includes a trumpet-shaped elastic body 2211, which is configured to guide gas smoothly (without turbulence or eddies) into the chamber 31. Specifically, the trumpet-shaped elastic body 2211 diffuses and disperses the airflow at the gas inlet 21, reducing the gas flow rate to a more appropriate level. This reduces turbulence and velocity variations in the airflow, allowing the gas to enter the chamber 31 more smoothly and steadily. This smoothly flowing airflow can effectively reduce the impact and vibration of the gas inside the chamber 31, and can also offset the sound waves at the gas outlet 22 to a certain extent, thereby reducing the generation of noise.

[0123] In another embodiment, the trumpet-shaped component at the gas inlet 21 of the noise reduction airway device 1 is a non-elastic body and is integrally formed with the housing 2 .

[0124] In another embodiment, the inlet tube 211 of the noise reducing airway device 1 is at least partially made of an elastomer.

[0125] Example 5

[0126] This embodiment provides a noise reduction airway device 1 used in the field of ventilators, referring to Figure 23 This embodiment provides a three-dimensional schematic diagram of the noise reduction airway device 1. Figure 23The embodiment of the present invention shown differs from the noise reduction airway device 1 in Example 1 in that the gas channel 3 of the noise reduction airway device 1 is internally provided with a polymer foam material. While the present invention has demonstrated that the noise reduction airway device 1 can meet regulatory noise levels without the polymer foam material, individual patient needs and preferences may vary. Some patients may require or prefer a quieter respiratory environment. Therefore, while ensuring patient safety and taking into account individual needs and preferences, sound insulation material 6 may be used within the gas channel 3 of the noise reduction airway device 1 to further reduce noise levels. It should be noted that the sound insulation material 6 herein does not include foam, but rather materials such as silicone and gel that are safer than foam. These materials also possess noise and vibration reduction properties and can effectively absorb and reduce airflow noise in place of foam, providing a quieter and more comfortable breathing environment for patients. This design approach of selectively using sound insulation material 6 can better meet the needs of different patients. This flexible design approach provides patients with a more personalized and personalized respiratory therapy experience, further improving their sleep quality and quality of life.

[0127] Example 6

[0128] This embodiment provides a noise reduction airway device 1 used in the field of ventilators, referring to Figure 25 、 Figure 26 This embodiment provides a three-dimensional schematic diagram of a breathing-related device. Figure 25 、 Figure 26 In the embodiment of the present invention shown, the difference from the noise reduction airway device 1 in embodiment one is that the housing 2 of the noise reduction airway device 1 constitutes a part of the respiratory-related device. It can also be understood that in this embodiment, the blower 4 is at least partially exposed to the interior of the housing of the respiratory-related device, that is, the housing 2 of the noise reduction airway device 1 is at least partially the same part as the housing of the respiratory-related device (ventilator). The at least part mentioned here can be specifically understood as the housing 2 of the noise reduction airway device 1 can be completely the same part as the housing of the respiratory-related device, or half of the housing 2 of the noise reduction airway device 2 or more or less can be the same part as the housing of the respiratory-related device. Figure 25 、 Figure 26This is a schematic diagram showing that the housing 2 of the noise reduction airway device 1 is completely identical to the housing of the respiratory-related device. This type of respiratory-related device reduces the size of the device while meeting the noise reduction requirements. The small size of the device is convenient for some special use scenarios. For example, some patients may need to carry the device frequently. The small size of the device ensures that these patients can continue to receive treatment for respiratory-related diseases under special circumstances, which helps to improve compliance with the device treatment. This method also simplifies the structure of the device by reducing the connection between the device housing and the housing 2 of the noise reduction airway device 1, and is also a more advantageous implementation method in terms of manufacturing and subsequent maintenance.

[0129] The noise reduction airway device 1 of the present invention has at least the following beneficial effects:

[0130] 1) Almost all respiratory devices currently on the market use foam within the air passageway 3 for noise reduction. However, foam is highly susceptible to health concerns for several reasons: ① Because foam is soft and has a relatively loose surface, it can be easily abraded or peeled off by airflow during use, releasing particles. Once released, these particles can easily enter the patient's airway with the airflow, irritating the respiratory system. This can cause respiratory problems, leading to symptoms such as sore throat and coughing, especially for those with pre-existing respiratory conditions such as asthma or chronic obstructive pulmonary disease (COPD). ② Furthermore, foam is often made from synthetic materials, which may contain residual chemical additives. These chemicals are gradually released as the foam ages and is used. In some cases, if the foam particles carry harmful microorganisms, this can lead to potential infection, especially for those with weakened immune systems. Foam particles can also trigger allergic reactions, including sneezing, flu, and eye irritation. ③ Furthermore, prolonged use of foam can accumulate dust, bacteria, and other contaminants. This is especially true for the foam in respiratory devices, which can easily absorb airborne contaminants, leading to bacterial growth and increasing the risk of infection.

[0131] This technology's design focused on the safety and reliability of the ventilator's noise-reduction airway device (1). Stringent safety measures were implemented, including a foam-free design, to mitigate potential health risks to patients during ventilator use. The gas passageway and filtration system were designed to be foam-free or easily replaceable to minimize these potential health risks. For patient safety, this technology also features a foam-free design for gas passageway 3. The absence of foam in gas passageway 3 reduces the potential for accumulation of microscopic foreign matter, helping to maintain cleanliness. More importantly, the exhaled air is unaffected by microscopic foam residue, reducing the number of particles the patient may inhale or be exposed to, ensuring device safety. This is particularly important for patients who use the device for extended periods, as it helps reduce potential respiratory issues. Furthermore, some patients may be allergic to particles from materials such as foam, and the foam-free design reduces the risk of allergic reactions. This is particularly important for patients with allergies to foam or chemically treated materials. These features enhance patient safety and comfort.

[0132] 2) The design of the foam-free noise reduction airway device 1 makes the noise reduction airway device 1 more reliable and extends the service life of the device. Foam is usually made of synthetic materials such as polyurethane and polyether. It is softer than plastic and silicone and is susceptible to mechanical damage and chemical erosion. It is extremely susceptible to aging due to the influence of the external environment, and the foam material usually contains some chemical additives or ingredients that cause the performance of the foam to change. These characteristics determine that the foam material has a short service life, so in theory it needs to be replaced frequently to maintain the functional effectiveness of the foam in the noise reduction airway device. In contrast, materials such as silicone and plastic usually have better wear resistance, corrosion resistance and endurance, and are less affected by the environment. In addition, materials such as silicone and plastic usually have good chemical stability and are not easily affected by chemical factors, so their service life is longer. The design of the foam-free noise reduction airway device 1 extends the service life of the noise reduction airway device 1 by removing the foam, thereby extending the service life of the device. In addition, the foam-free design can simplify the internal structure of the gas channel 3 of the device. There is no need to design extra structures to fix the foam, which reduces the number of components and thus reduces the complexity of manufacturing. This helps to improve the reliability and stability of the device. At the same time, foam materials often need to be replaced and cleaned in a timely manner to ensure health. The foam placed inside the device often cannot be replaced or cleaned. The foam-free design avoids these steps, reduces the maintenance requirements of the foam inside the gas channel, and improves the convenience of using the device.

[0133] 3) Utilizing effective noise reduction structures, the noise-reducing airway device 1 can still meet regulatory noise levels even without the aid of foam. This noise-reducing airway device 1 utilizes various noise-reducing structures, replacing the role of traditional foam within the noise-reducing airway device 1. Specifically, the various noise-reducing structures employed in this technology include, but are not limited to, a tapered inlet pipe, a trumpet-shaped elastomer made of elastic material, a more rational placement of the blower 4, an arcuate wall that forms the entrance to the blower inlet 41 and is substantially coaxial with the blower 4 inlet, and a rounded corner on the inner wall of the gas channel 3 opposite the airflow path. The use of these structures and components not only effectively reduces noise levels but also improves the stability and reliability of the noise-reducing airway device 1. More importantly, the noise-reducing components within the noise-reducing airway device 1, its internal structure, and the relationships between these structures are all based on sufficient experimental data and scientific analysis, ensuring the scientific and credible design of the noise-reducing airway device 1 and improving its reliability and stability. This scientifically proven noise-reducing airway device design not only improves product performance, but also provides patients with a quieter and more reliable experience.

[0134] 4) This technology reduces device costs and is environmentally friendly through its simpler structure and materials. The noise-reducing airway device 1 design of this technology eliminates traditional foam materials, using only plastic for the device's housing 2 and for the chamber 31 and passageway. Silicone is also used for the connectors securing the blower 4 to the device's housing 2, thereby reducing the manufacturer's costs associated with purchasing additional foam materials. Furthermore, compared to existing complex ventilator noise-reducing airway devices 1 with internal foam, this noise-reducing airway device 1 constructed from only two materials is easier to process and assemble, making its manufacturing process simpler and more efficient. Furthermore, the reduced use of auxiliary materials, such as foam, also reduces environmental impact, aligning with modern society's environmental protection requirements and trends, and making a positive contribution to environmental protection. Foam releases harmful chemicals during production and processing, causing environmental pollution. The foam-free design of the noise-reducing airway device 1 avoids the release of these harmful substances, reducing negative environmental impacts. Therefore, the design of the noise reduction airway device 1 that does not use foam but only uses silicone and plastic not only reduces the cost of the device but also complies with the concept of environmental protection, and is a more sustainable and economical design solution.

[0135] The embodiments of the utility model are described above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the utility model, ordinary technicians in this field can also make many forms without departing from the scope of protection of the utility model and the claims, all of which are protected by the utility model.

Claims

1. A noise reduction airway device for use in the field of ventilators, configured to pressurize gas and provide the pressurized gas to the patient's respiratory tract, characterized in that: The noise reduction airway device includes: a blower having an air inlet and an air outlet, configured to generate a pressurized gas flow; a housing having at least one gas inlet for receiving breathable gas, at least one gas outlet for allowing gas to flow out, an inner wall, and an outer wall; a gas passage, a space enclosed by the inner wall of the housing, configured to allow the circulation of breathable gas, the gas passage forming at least one chamber in the inner wall, and the sum of the volumes of the chambers being greater than three times the volume of the blower; wherein the gas outlet is provided with an outlet pipe configured to be connected to the gas outlet and communicate with the blower outlet; There is no foam in the gas channel.

2. The noise reduction airway device according to claim 1, characterized in that The gas channel forms a first chamber and a second chamber.

3. The noise reduction airway device according to claim 2, characterized in that The volume of the first chamber is greater than the volume of the second chamber.

4. The noise reduction airway device according to claim 1, characterized in that The gas inlet axis is parallel or perpendicular to the blower air inlet axis.

5. The noise reduction airway device according to claim 1, characterized in that The gas inlet is provided with an inlet pipe, which is configured to be connected to the shell and has a taper.

6. The noise reduction airway device according to claim 1, characterized in that The housing forms part of a breathing-related device.

7. The noise reduction airway device according to claim 1, characterized in that The shell of the noise reduction airway device is made of one of polypropylene PP, polycarbonate PC, polyethylene terephthalate-1,4-cyclohexanedimethanol PCTG, polyamide PA, and polyetheretherketone PEEK.

8. A noise reduction airway device for use in the field of ventilators, configured to pressurize gas and provide the pressurized gas to the patient's respiratory tract, characterized in that: The noise reduction airway device includes: a blower having an air inlet and an air outlet, configured to generate a pressurized gas flow; a housing having at least one gas inlet for receiving breathable gas, at least one gas outlet for allowing gas to flow out, an inner wall, and an outer wall; a gas passage, a space enclosed by the inner wall of the housing, configured to allow the circulation of breathable gas, the gas passage forming at least one chamber in the inner wall, and the sum of the volumes of the chambers being greater than three times the volume of the blower; The gas outlet has an outlet pipe, which is configured to be connected to the gas outlet and communicate with the blower outlet, and the outlet pipe has at least one of the following characteristics: The outlet pipe has at least one wall section coaxial with the axis of the blower outlet; The length of the outlet pipe is greater than or equal to the diameter of the blower outlet; The opening area of ​​the outlet pipe is 75%-125% of the blower outlet area; There is no foam in the gas channel.

9. The noise reduction airway device according to claim 8, characterized in that The outlet pipe has a wall section coaxial with the axis of the blower outlet near the blower outlet, and the length of the wall section is greater than or equal to 6 mm.

10. The noise reduction airway device according to claim 8, characterized in that The gas inlet is provided with an inlet pipe.

11. The noise reduction airway device according to claim 8, characterized in that The distances between the center of the blower air inlet and the inner wall of the shell are approximately equal.

12. The noise reduction airway device according to claim 8, characterized in that The housing has a wall proximate the blower air inlet that is substantially coaxial with the blower air inlet.

13. The noise reduction airway device according to claim 8, characterized in that The outlet pipe is made of one of the materials selected from the group consisting of plastic, silicone, rubber, TPE, TPU, and fluororubber.

14. The noise reduction airway device according to claim 8, characterized in that The housing forms part of a breathing-related device.

15. A noise reduction airway device for use in the field of ventilators, configured to pressurize gas and provide the pressurized gas to the patient's respiratory tract, characterized in that: The noise reduction airway device includes: a blower having an air inlet and an air outlet, configured to generate a pressurized gas flow; a housing having at least one gas inlet for receiving breathable gas, at least one gas outlet for allowing gas to flow out, an inner wall, and an outer wall; a gas passage, a space enclosed by the inner wall of the housing, configured to allow the circulation of breathable gas, the gas passage forming at least one chamber in the inner wall, and the sum of the volumes of the chambers being greater than three times the volume of the blower; The gas inlet has an inlet pipe, which is configured to have an air inlet end connected to the housing and an air outlet end for flowing out the breathable gas, and the inlet pipe has at least one of the following characteristics: The straight-line distance from the center of the air outlet end of the inlet pipe to the center of the air inlet of the blower is 35mm-150mm; The ratio of the inlet pipe length to the straight-line distance from the center of the inlet pipe outlet to the center of the blower inlet is in the range of 0.16-2.29; The distance between the blower air inlet and the inner wall of the housing is greater than 5 mm. There is no foam in the gas channel.

16. The noise reducing airway device according to claim 15, characterized in that The inlet pipe is located at an edge portion of the gas channel.

17. The noise reducing airway device according to claim 15, characterized in that A transition component is provided between the gas outlet and the blower outlet to connect the two and prevent gas leakage.

18. The noise reducing airway device of claim 15, wherein: The noise reduction air duct device comprises a first chamber, a second chamber, and a wall separating the first chamber from the second chamber, wherein the wall has an opening and is configured to communicate with the blower air inlet.

19. The noise reducing airway device of claim 15, wherein: The gas outlet axis is not located on the horizontal plane where the inlet pipe axis is located.

20. The noise reducing airway device of claim 15, wherein: The noise reduction airway device does not contain any components made of polymer foam material.

21. The noise reducing airway device of claim 15, wherein: The housing forms part of a breathing-related device.

22. A noise reduction airway device for use in the field of ventilators, configured to pressurize gas and provide the pressurized gas to the patient's respiratory tract, characterized in that: The noise reduction airway device includes: a blower having an air inlet and an air outlet, configured to generate a pressurized gas flow; a housing having at least one gas inlet for receiving breathable gas, at least one gas outlet for allowing gas to flow out, an inner wall, and an outer wall; a gas passage, a space enclosed by the inner wall of the housing, configured to allow the circulation of breathable gas, the breathable gas passage forming at least one chamber in the inner wall, and the sum of the volumes of the chambers being greater than three times the volume of the blower; The gas inlet has an inlet pipe configured to have an air inlet end connected to the housing and an air outlet end for flowing out breathable gas, and the area enclosed by the wall of the air inlet end of the inlet pipe is not less than 75% of the area of ​​the air inlet of the blower; Wherein, the gas inlet and the gas outlet are not on the same wall; There is no foam in the gas channel.

23. The noise reducing airway device of claim 22, wherein: The air inlet end of the inlet tube has a trumpet-shaped elastic body configured to smoothly guide the breathable gas into the chamber.

24. The noise reducing airway device of claim 22, wherein: The distance between the blower air inlet and the inner wall of the shell opposite to it is greater than 5 mm.

25. The noise reducing airway device of claim 22, wherein: The distance between the air outlet end of the inlet pipe and the inner wall of the shell opposite thereto is greater than 1.5 times the diameter of the air inlet end thereof.

26. The noise reducing airway device of claim 22, wherein: The inlet pipe has a draft angle and the draft angle is greater than or equal to 1.5°.

27. The noise reducing airway device of claim 22, wherein: The gas inlet and the gas outlet are not coaxial.

28. The noise reducing airway device of claim 22, wherein: The housing forms part of a breathing-related device.

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