Respiratory and ventilating equipment

Abstract

Embodiments of the present disclosure provide a respiratory ventilation device including a body configured to generate a high-pressure gas at a pressure higher than atmospheric pressure. The body may include a noise reduction device configured to reduce noise generated during the operation of the body. The noise reduction device may include an intake structure, a noise reduction housing, a blower cavity, and a gas passage. Gas can enter the gas passage through the intake structure. The gas passage may be formed between the side wall of the noise reduction housing and the side wall of the blower cavity and configured to transport gas. The blower cavity may have at least one cavity intake port along the airflow direction. Gas in the gas passage can enter the blower cavity through the cavity intake port.

Description

Technical Field

[0001] (Cross-reference to Related Applications) This application claims priority to Chinese Patent Application No. 202310456483.5 filed on April 25, 2023, Chinese Patent Application No. 202310456713.8 filed on April 25, 2023, Chinese Patent Application No. 202320965661.2 filed on April 25, 2023, Chinese Patent Application No. 202310457610.3 filed on April 25, 2023, Chinese Patent Application No. 202320965161.9 filed on April 25, 2023, Chinese Patent Application No. 202320964150.9 filed on April 25, 2023, Chinese Patent Application No. 202310456467.6 filed on April 25, 2023, Chinese Patent Application No. 202320965277.2 filed on April 25, 2023, Chinese Patent Application No. 202310457714.4 filed on April 25, 2023, Chinese Patent Application No. 202320959625.5 filed on April 25, 2023, and International Application No. PCT / CN2023 / 090623 filed on April 25, 2023, the contents of which are hereby incorporated by reference in their entirety.

[0002] This disclosure relates to the technical field of medical devices, particularly to respiratory ventilation devices.

Background Art

[0003] Respiratory ventilation devices, as devices with artificial ventilation functions, are widely used to treat respiratory failure caused by various factors, sleep apnea and hypopnea syndrome, and other diseases. Respiratory ventilation devices occupy a very important position in the field of modern medicine. When a user uses a respiratory ventilation device to treat a respiratory disease, the device needs to draw in gas from the external environment, process it through a series of steps, and then provide it to the user's breathing. Current respiratory ventilation devices often have many problems. For example, the noise generated by the fan can seriously affect the patient's rest and, consequently, interfere with the patient's treatment. Also, for example, water in the water tank can return to the gas passage and cause suffocation.

[0004] To address the above-mentioned problems, this disclosure aims to provide a respiratory ventilation device. [Overview of the Initiative]

[0005] One embodiment of the present disclosure provides a respiratory ventilation device including a body configured to generate a high-pressure gas at a pressure higher than atmospheric pressure. The body may include a noise reduction device for reducing noise generated during the operation of the body. The noise reduction device may include an intake structure, a noise reduction housing, a blower cavity, and a gas passage. Gas can enter the gas passage through the intake structure. A gas passage may be formed between the side wall of the noise reduction housing and the side wall of the blower cavity, and the gas passage may be configured to transmit gas. The blower cavity may be provided with at least one cavity intake port along the airflow direction. Gas in the gas passage can enter the blower cavity through the cavity intake port.

[0006] In some embodiments, the gas passage may be provided so as to surround the outer wall of the blower cavity.

[0007] In some embodiments, the blower cavity may be provided with at least two cavity intake ports along the airflow direction. By using at least two cavity intake ports to divert the gas in the gas passage and direct it into the blower cavity, gas turbulence can be reduced. In this way, noise from the airflow entering the blower cavity can be effectively reduced.

[0008] In some embodiments, the intake structure may be located at the starting end of the gas passage in the direction of extension, and the cavity intake may be located at the end of the gas passage in the direction of extension, and the angle between the first connecting line connecting the exhaust port of the intake structure and the center of the gas passage and the second connecting line connecting the cavity intake and the center of the gas passage may be greater than 180°. An annular gas passage with a deflection angle greater than 180° may be provided so as to surround the outside of the blower cavity, and the intake port and cavity intake port may be located at the starting and ending ends of the gas passage in the direction of extension, respectively. This allows the airflow to flow along a longer path in the annular gas passage, and noise can be further reduced. In addition, since the annular gas passage reduces noise caused by internal airflow, the annular gas passage can further reduce noise caused by the operation of the blower in the blower cavity.

[0009] In some embodiments, the main body may include a blower. The blower may be fixedly mounted inside the noise reduction device, or it may be fixedly mounted to the bottom, top, or side wall of the noise reduction device by a blower mounting structure.

[0010] In some embodiments, there is a gap between the outer wall of the blower and the inner wall of the noise reduction device. Regardless of how the blower is mounted inside the noise reduction device, the gap between the outer wall of the blower and the inner wall of the noise reduction device effectively prevents vibration noise generated during blower operation from being transmitted to the outside, thereby further reducing the overall noise of the device.

[0011] In some embodiments, the respiratory ventilation device may further include a connecting device that includes a ventilation tube for receiving a high-pressure gas.

[0012] In some embodiments, the respiratory ventilation device may further include a sealing structure configured for a sealed connection between the main body and the connecting device.

[0013] In some embodiments, the sealing structure may further include an elastic tube, the elastic tube or ventilation tube having an annular projection, the annular projection being used for a sealing connection between the elastic tube and the ventilation tube.

[0014] Respiratory ventilation devices may have annular projections on the ventilation tube or the elastic tube of the sealed structure, and it is permissible for the annular projections to deform under pressure during the fitting process between the ventilation tube and the elastic tube of the connecting device. After deformation, the annular projections generate a large frictional force between the ventilation tube and the elastic tube, which can limit the separation of the ventilation tube and the elastic tube, ensuring not only the airtightness and robustness of the connection between the ventilation tube and the elastic tube, but also simplifying the assembly work and effectively improving assembly efficiency.

[0015] In some embodiments, the connecting device may include a water tank or a cover plate without a water tank.

[0016] In some embodiments, the water tank may include a water tank housing comprising a water tank upper housing and a water tank lower housing, and including a water tank cavity for containing liquid; a heat transfer member provided in the water tank lower housing for transferring heat to vaporize the liquid in the water tank cavity; an intake passage provided in the water tank upper housing for introducing gas from outside the water tank into the water tank cavity, comprising a first water tank intake port into which gas enters the intake passage from outside the water tank, and a first water tank exhaust port into which the gas in the intake passage enters the water tank cavity; and an exhaust passage provided in the water tank upper housing for discharging gas from the water tank cavity, comprising a second water tank intake port into which gas in the water tank cavity enters the exhaust passage, and a second water tank exhaust port for discharging gas from the exhaust passage.

[0017] In some embodiments, the water tank may further include a backflow prevention member configured to prevent the liquid in the water tank cavity from flowing back into at least one of the intake passage or exhaust passage.

[0018] By providing a gas passage within the water tank, the problem of liquid in the water tank flowing back into the intake or exhaust port, damaging the respiratory ventilation device or causing patient suffocation, is solved, ensuring the normal use of the respiratory ventilation device and improving the patient's experience.

[0019] In some embodiments, the water tank may further include a push button provided on the outer surface of the water tank housing, which is configured to be pressed by an external force in a direction toward the interior of the water tank housing so that the water tank can be attached to and detached from the main body.

[0020] In some embodiments, the push button further includes an elastic structure configured to elastically deform when pressed toward the interior of the water tank housing, and to revert to its original shape when the external force is released, thereby driving the push button to rebound away from the interior of the water tank housing, and to return to its original position after the water tank has been fixed to or removed from the body of the respiratory ventilation device.

[0021] By providing a push button, a detachable connection between the water tank and the main body of the respiratory ventilation device can be achieved, reducing the difficulty of removing the water tank and allowing for flexible installation of the connection between the water tank and the main body of the respiratory ventilation device. The push button has an elastic structure, allowing it to automatically return to its original position after being pressed, eliminating the need for extra operations and making it easy to use. The movable position of the push button relative to the water tank housing ensures that the water tank remains stable during removal and is less prone to shaking relative to the main body of the respiratory ventilation device. stomach. In this case, the connection between the water tank and the main body of the respiratory ventilation device is not only strengthened, but the difficulty of inserting and removing the water tank from the main body of the respiratory ventilation device is reduced, ensuring that the water tank can be attached and detached more easily.

[0022] In some embodiments, the water tank may further include a heating device configured to heat the liquid inside the water tank.

[0023] In some embodiments, the heating device may be detachably attached to the lower end of the water tank. By detachably connecting the separate water tank and the heating device, the water tank can be made a disposable water tank, thereby solving the problem of the water tank being difficult to clean. The heating device can be removed and cleaned, and replaced with a new water tank to enable reuse.

[0024] In some embodiments, the noise reduction device may include a porous sound-absorbing plate configured to improve the noise reduction effect of the noise reduction device. The porous sound-absorbing plate is provided with through holes along the thickness direction and includes a first surface in contact with the airflow and a second surface away from the airflow. The through holes of the porous sound-absorbing plate may communicate with the first surface and the second surface, and the through holes may include at least a first type of through hole and a second type of through hole, and the aperture of the first type of through hole is smaller than the aperture of the second type of through hole.

[0025] By providing a porous sound-absorbing plate in the noise reduction device, noise reduction can be performed through the through holes of the porous sound-absorbing plate, and the noise reduction range of the porous sound-absorbing plate can be expanded by using through holes with different apertures.

[0026] In some embodiments, the breathing ventilation device may further include a liquid level detection device configured to detect the liquid level of the humidifier in the breathing ventilation device.

[0027] In the liquid level detection device of some embodiments, the main control chip may be connected to the circuit of the capacitance sensor and may be configured to determine whether the liquid level is lower than the position height in the vertical direction of the sensor based on the capacitance value. The capacitance sensing of the liquid level detection device in some embodiments may be a remote sensing effect, and it is not necessary for the sensor to directly contact the measured object (such as water, etc.). Because the structure is simple, there is no need to perforate the main body side wall and the side wall of the water tank, the mode of the water tank is not limited, the detection circuit is simpler, the detection is more accurate, the anti-interference ability is higher, and the cost is lower.

[0028] In some embodiments, the breathing ventilation device may further include a flow rate detection device configured to detect the flow rate of the airflow output by the breathing ventilation device. The flow rate detection device may be installed in the noise reduction device so as to form a differential pressure on both sides along the airflow direction of the flow rate detection device, and the flow rate detection is realized by using the differential pressure principle.

[0029] In some embodiments, the breathing ventilator device may include a pipe joint that communicates with an external device. After the outside air is pressurized by the main body, it may be sent to the external device through the pipe joint. The pipe joint is provided therein with a temperature detection device for detecting the gas temperature in the pipe joint. Based on the temperature detected by the temperature detection device, the heating temperature of the heating device in the humidifier can be further adjusted.

[0030] In some embodiments, the breathing ventilator device may further include a main body button provided on the main body housing of the breathing ventilator device. The main body button includes a function button configured for the user to operate the operation of the breathing ventilator device. By providing the function button, the user can conveniently operate the operation of the breathing ventilator device and realize operations such as on, off control, and parameter setting.

[0031] One embodiment of the present disclosure provides a noise reduction device. The noise reduction device may include an intake structure, a noise reduction housing, a blower cavity, and a gas passage. The gas passage may be located between the inner wall of the noise reduction housing and the outer wall of the blower cavity. The gas passage may be configured to transmit an air flow. The blower cavity may be provided with at least two cavity air inlets along the air flow direction. The gas enters the gas passage through the intake structure and then enters the blower cavity through the cavity air inlet.

[0032] In some embodiments, the gas passage may include three spaces in the direction along the air flow direction. At least three spaces may be alternately arranged with a large cavity and a small cavity spaced apart from each other, and the cavity air inlet may be provided in one of the at least three spaces having a large cavity.

[0033] In some embodiments, the gas passage may include a first space, a second space, and a third space in the direction of airflow. The first space may be larger than the second space, and the second space may be smaller than the third space. The blower cavity may include a first intake port located in the first space and a second intake port located in the third space.

[0034] In some embodiments, the gas passage may further include a fourth space and a fifth space in the airflow direction. The fourth space may be smaller than the third space, and the fifth space may be larger than the fourth space. The blower cavity may further include a third intake port located in the fifth space.

[0035] In some embodiments, the intake structure includes an intake pipe. The intake pipe may include one or more partition members inside in order to divide the intake pipe into two or more intake sub-pipes.

[0036] In some embodiments, a porous sound-absorbing plate and / or sound-absorbing cotton may be provided in the gas passage. The porous sound-absorbing plate may have multiple sound-absorbing holes in the thickness direction.

[0037] In some embodiments, the vertical position height of the exhaust port of the intake structure may be smaller than the vertical position height of the intake port.

[0038] One embodiment of the present disclosure can provide a respiratory ventilation device that includes a noise reduction device as described in any of the above embodiments.

[0039] One embodiment of the present disclosure can provide another noise reduction device including a noise reduction housing, an intake structure, a blower cavity, and a gas passage. Gas can enter the gas passage through an exhaust port of the intake structure. The gas passage is located between the inner wall of the noise reduction housing and the outer wall of the blower cavity and may be provided along the outer wall of the blower cavity. A cavity intake port may be provided in the blower cavity. Gas in the gas passage can enter the blower cavity through the cavity intake port. The intake structure may be located at the starting end in the extending direction of the gas passage, and the cavity intake port may be located at the end in the extending direction of the gas passage. The angle between a first connecting line connecting the exhaust port of the intake structure and the center of the gas passage and a second connecting line connecting the cavity intake port and the center of the gas passage may be greater than 180°.

[0040] In some embodiments, the intake structure may include an intake tube having a bent structure so that the gas is redirected within the intake tube before flowing into the gas passage.

[0041] In some embodiments, intake tube The first airflow direction at the intake port is different from the second airflow direction at the exhaust port of the intake pipe.

[0042] In some embodiments, the bent structure may position the intake port and exhaust port of the intake pipe at different heights.

[0043] In some embodiments, the noise reduction housing may further include a water collection cavity. The blower cavity may further include a cavity exhaust port communicating with the water collection cavity.

[0044] In some embodiments, the noise reduction housing may be provided with a main outlet, allowing the gas to flow out from the cavity exhaust port, enter the water collection cavity, be lifted, and then flow out from the main outlet.

[0045] In some embodiments, the vertical position height of the cavity exhaust port may be higher than the bottom surface of the water collection cavity.

[0046] In some embodiments, a porous sound-absorbing plate and / or sound-absorbing cotton may be placed in the gas passage. The porous sound-absorbing plate may have multiple sound-absorbing holes in the thickness direction.

[0047] One embodiment of the present disclosure provides another respiratory ventilation device including the noise reduction device described in any of the above embodiments.

[0048] One embodiment of the present disclosure is, A porous sound-absorbing plate can be provided, and this porous sound-absorbing plate is A first surface in contact with the airflow and a second surface away from the airflow implied , through the porous sound-absorbing plate The hole The through holes communicate with the first and second surfaces. The through holes may include at least a first type through hole and a second type through hole, the diameter of the first type through hole being smaller than the diameter of the second type through hole.

[0049] In some embodiments, the through-hole may include a first opening on the first surface, a second opening on the second surface, and a side wall of the through-hole connecting the first and second openings. The diameter of the first opening may be smaller than or equal to the diameter of the second opening.

[0050] In some embodiments, the porous sound-absorbing plate may include a first porous sound-absorbing plate provided along a first plane and a second porous sound-absorbing plate provided at a predetermined angle to the first plane. The through holes in the first porous sound-absorbing plate may be of type 1, and the through holes in the second porous sound-absorbing plate may be of type 2.

[0051] In some embodiments, the porous sound-absorbing plate may include a dividing member and / or a guide member, wherein when airflow flows through the dividing member, the airflow flows simultaneously over the two partition member surfaces of the dividing member, and when airflow flows through the guide member, the airflow flows sequentially over the two partition member surfaces of the guide member.

[0052] In some embodiments, the second porous sound-absorbing plate may further include at least one porous sound-absorbing plate bend and a group of fourth partition members provided on the porous sound-absorbing plate bend, wherein the angle between the installation direction and the airflow direction satisfies a second threshold condition. The group of fourth partition members includes at least one first side partition member and at least one second side partition member, wherein the first side partition member is installed on one side of the porous sound-absorbing plate bend, and the second side partition member is installed on the other side of the porous sound-absorbing plate bend, and the first side partition members are installed alternately adjacent to the second side partition members in the installation direction of the second porous sound-absorbing plate, and adjacent first side partition members and second side partition members may have alternating portions in the installation direction of the second porous sound-absorbing plate. When airflow flows in the order of adjacent first and second partition members, the airflow may flow along the first surface of the first partition member, turn when it reaches the end of the first partition member, enter the airflow passage formed in the alternating section, and then flow out to the first surface of the second partition member.

[0053] One embodiment of the present disclosure provides another respiratory ventilation device comprising a porous sound-absorbing plate as described in any of the above embodiments.

[0054] One embodiment of the present disclosure provides another respiratory ventilation device comprising a main body configured to generate a high-pressure gas higher than atmospheric pressure, a connecting device including a ventilation pipe for receiving the high-pressure gas, and a sealing structure configured for use in a sealed connection between the main body and the connecting device, wherein the sealing structure includes an elastic pipe, and the elastic pipe or ventilation pipe is provided with an annular projection used for a sealed connection between the elastic pipe and the ventilation pipe.

[0055] In some embodiments, the annular projection may be provided on the inner wall of the elastic pipe or the outer wall of the ventilation pipe so that the ventilation pipe enters the elastic pipe, or the annular projection may be provided on the inner wall of the ventilation pipe or the outer wall of the elastic pipe so that the elastic pipe enters the ventilation pipe.

[0056] In some embodiments, limit grooves may be provided on the outer wall of the elastic tube or the outer wall of the ventilation tube. The main body may include a limit structure. The limit structure is coupled to the limit groove and is used in conjunction with the limit groove to restrict the radial range of movement of the elastic tube or ventilation tube.

[0057] In some embodiments, the limit groove includes one or more limit protrusions distributed circumferentially along the outer wall of the limit groove, and the distance between the outer wall of one or more limit protrusions and the central axis of the limit groove is greater than or equal to the inner diameter of the limit structure.

[0058] One embodiment of the present disclosure provides a water tank comprising: a water tank housing including an upper water tank housing and a lower water tank housing, further including a water tank cavity for containing liquid; a heat transfer member provided in the lower water tank housing for conducting heat to the liquid in the water tank cavity in order to vaporize the liquid in the water tank cavity; an intake passage provided in the upper water tank housing for introducing gas into the water tank cavity, including a first water tank intake port into which gas from outside the water tank enters the intake passage and a first water tank exhaust port into which gas in the intake passage enters the water tank cavity; an exhaust passage provided in the upper water tank housing for discharging gas from the water tank cavity, including a second water tank intake port into which gas from inside the water tank cavity enters the exhaust passage and a second water tank exhaust port for discharging gas from the exhaust passage; and a backflow prevention member for preventing the liquid in the water tank cavity from flowing back into the intake passage and / or exhaust passage.

[0059] In some embodiments, the backflow prevention member may include one or more of a first bend in the intake passage and a second bend and / or flow guide ribs in the exhaust passage. The first and second bends may bend toward the center of the water tank cavity, the first water tank exhaust port may be provided in the first bend, and the second water tank intake port may be provided in the second bend. The flow guide ribs may be provided between the first water tank exhaust port and the side wall of the upper housing adjacent to the first water tank exhaust port, and / or between the second water tank intake port and the side wall of the upper housing adjacent to the second water tank intake port.

[0060] In some embodiments, the distance between the first exhaust port and / or the second intake port of the water tank and the center of the water tank cavity may be smaller than a predetermined distance threshold.

[0061] In some embodiments, the first exhaust port of the water tank may be an exhaust port in the first opening direction, and the second exhaust port of the water tank may be an exhaust port in the second opening direction. The first opening direction may be opposite to or perpendicular to the second opening direction.

[0062] In some embodiments, at least one side of the intake passage and / or exhaust passage may be removable.

[0063] One embodiment of the present disclosure provides another respiratory ventilation device comprising a main body and a water tank as described in any of the above embodiments.

[0064] One embodiment of the present disclosure includes a water tank housing and a push button provided on the outer surface of the water tank housing, the push button providing another water tank configured to be detachable from the main body by being pressed in a direction toward the interior of the water tank housing by an external force. The push button may further include an elastic structure configured to elastically deform when pressed toward the interior of the water tank housing, and to return to its original position when the external force is released, thereby driving the push button to rebound away from the interior of the water tank housing, thereby fixing or removing the water tank from the main body of the respiratory ventilation device.

[0065] In some embodiments, the push button may further include a connecting structure provided at one end closer to the body of the push button and detachably connected to the body, and the connecting structure may be separated from the body when the push button is pressed toward the interior of the water tank housing.

[0066] In some embodiments, the elastic structure may include at least one of an elastic arm and an elastic member, the elastic arm having a free end and a fixed end, and the elastic arm is configured to be elastically deformable such that the free end slides away from the fixed end when the push button is pressed toward the interior of the water tank housing, and the elastic arm is elastically deformed. When the external force is released, the free end slides toward the fixed end and the elastic arm restores its deformation. The elastic member may be configured to elastically deform by decreasing in height when the push button is pressed toward the interior of the water tank housing, and to return to its original shape by increasing in height when the external force is released.

[0067] In some embodiments, one end of the elastic member may be fixedly connected to either the side of the push button closer to the inside of the water tank housing or the outer surface of the water tank housing, while the other end of the elastic member may be in contact with the other side of the push button closer to the inside of the water tank housing or the outer surface of the water tank housing.

[0068] In some embodiments, at least one of a limit structure and a guide structure may be further provided between the push button and the outer surface of the water tank housing. The limit structure may be configured to restrict the range of movement of the push button away from the inside of the water tank housing, and the guide structure may be configured to guide the movement of the push button along a predetermined path.

[0069] In some embodiments, the outer surface of the water tank housing may include a recessed structure, the push button is housed within the recessed structure, and the elastic structure is close to the inside of the water tank housing of the push button. side and It is provided between the bottom of the recessed structure.

[0070] One embodiment of the present disclosure provides another respiratory ventilation device including a water tank as described in any of the above embodiments.

[0071] One embodiment of the present disclosure is a liquid level detection device used for detecting the liquid level of a humidifier in a respiratory ventilation device, comprising at least one sensor configured to detect the liquid level of the humidifier, wherein the sensor is provided on the side wall of the main body of the respiratory ventilation device, on the side away from the humidifier side wall or on the side facing the humidifier side wall, and the main body side wall is adjacent to the humidifier side wall.

[0072] In some embodiments, the difference between the first position height of the sensor and the second position height of the humidifier bottom plate may range from 2 mm to 50 mm.

[0073] In some embodiments, multiple sensors are present, each of which is positioned at a predetermined height in the vertical direction.

[0074] In some embodiments, when the sensor is located on the side of the main body away from the humidifier side wall, the horizontal distance between the sensor and the inner wall of the humidifier side wall may range from 1 mm to 8 mm.

[0075] In some embodiments, the sensor may include a capacitance sensor, and the liquid level detection device may further include a main control chip connected to the sensor circuit, the main control chip being configured to receive capacitance values ​​collected by the sensor and to determine, based on the capacitance values, whether the liquid level is lower than the vertical position height of the sensor.

[0076] One embodiment of the present disclosure provides another respiratory ventilation device, which includes the liquid level detection device described in any of the above embodiments. [Brief explanation of the drawing]

[0077] The present disclosure will be further illustrated by exemplary embodiments. These exemplary embodiments will be described in detail with reference to the drawings. These embodiments are not limiting, and in these embodiments, the same reference numerals indicate the same structure.

[0078] [Figure 1A] This is a schematic diagram of an exemplary system for a respiratory ventilation device according to some embodiments of the present disclosure.

[0079] [Figure 1B] This is a schematic diagram of respiratory ventilation equipment according to some embodiments of the present disclosure.

[0080] [Figure 1C] This is a schematic diagram of the structure of a noise reduction device in a respiratory ventilation device according to some embodiments of the present disclosure.

[0081] [Figure 1D] This is a schematic diagram of the suspension mounting of the top of a blower in a noise reduction device according to some embodiments of the present disclosure.

[0082] [Figure 1E] This is a schematic diagram of the support mounting at the bottom of a blower in a noise reduction device according to some embodiments of the present disclosure.

[0083] [Figure 1F]This is a schematic diagram of the suspension mounting of a blower on the side wall of a noise reduction device according to some embodiments of the present disclosure.

[0084] [Figure 1G] This is a schematic diagram of the three-dimensional structure of the cross-section along the BB direction in Figure 1F.

[0085] [Figure 1H] This is an exploded schematic diagram of a water tank and heating device for a respiratory ventilation device according to some embodiments of the present disclosure.

[0086] [Figure 1I] This is an exploded schematic diagram of a water tank and heating device for a respiratory ventilation device according to some other embodiments of the present disclosure.

[0087] [Figure 1J] This is an exploded schematic diagram of the specific structure of a water tank and heating device for a respiratory ventilation device according to some embodiments of the present disclosure.

[0088] [Figure 1K] This is a schematic diagram of the elastic support structure of a heating device according to some embodiments of the present disclosure.

[0089] [Figure 2A] This is a 3D schematic diagram of the structure of a noise reduction device (without a noise reduction top housing) according to some embodiments of the present disclosure.

[0090] [Figure 2B] This is a schematic top view of the structure of a noise reduction device (without a noise reduction top housing) according to some embodiments of the present disclosure.

[0091] [Figure 2C] This is a schematic top view of the structure of a noise reduction device (without a noise reduction top housing) according to some embodiments of the present disclosure.

[0092] [Figure 2D] This is a schematic top view of the structure of a noise reduction device (without a noise reduction top housing) according to some other embodiments of the present disclosure.

[0093] [Figure 3A] This is a 3D schematic diagram of the structure of a noise reduction device according to some other embodiments of the present disclosure.

[0094] [Figure 3B] This is a 3D schematic diagram of the structure of a noise reduction device (without a noise reduction top housing) according to some other embodiments of the present disclosure.

[0095] [Figure 3C] This is a schematic top view of the structure of a noise reduction device (without a noise reduction top housing) according to some other embodiments of the present disclosure.

[0096] [Figure 3D] This is a schematic front view of the internal cavity structure of the intake pipe of a noise reduction device according to some other embodiments of the present disclosure.

[0097] [Figure 3E] This is a 3D schematic diagram of the structure of a porous sound-absorbing plate in a noise reduction device according to some other embodiments of the present disclosure.

[0098] [Figure 3F] A schematic top view of the structure of a porous sound-absorbing plate in a noise reduction device according to some other embodiments of the present disclosure.

[0099] [Figure 3G] This is a 3D schematic diagram of the structure of a noise reduction device (without a noise reduction top housing) according to some other embodiments of the present disclosure.

[0100] [Figure 4A] This is a schematic diagram of the structure of a porous sound-absorbing plate according to some embodiments of the present disclosure.

[0101] [Figure 4B] Figure 4A is a cross-sectional view of the porous sound-absorbing plate along axis AA.

[0102] [Figure 4C] This is a cross-sectional view of a noise reduction structure according to some embodiments of the present disclosure.

[0103] [Figure 4D] This is a schematic diagram of the structure of the first partition member of a porous sound-absorbing plate according to some embodiments of the present disclosure.

[0104] [Figure 4E] This is a schematic diagram of the structure of the second partition member of a porous sound-absorbing plate according to some embodiments of the present disclosure.

[0105] [Figure 4F] This is a schematic diagram of the structure of the third partition member of a porous sound-absorbing plate according to some embodiments of the present disclosure.

[0106] [Figure 4G] This is a schematic diagram of the structure of the fourth and fifth partition members of a porous sound-absorbing plate according to some embodiments of the present disclosure.

[0107] [Figure 4H] This is a schematic diagram of a noise reduction device (without a noise reduction bottom housing) according to some embodiments of the present disclosure.

[0108] [Figure 5A] This is a schematic diagram of the structure of a respiratory ventilation device according to some embodiments of the present disclosure when the main body is not connected to a connecting device.

[0109] [Figure 5B] This is a schematic diagram of the structure when the main body of a respiratory ventilation device according to some embodiments of the present disclosure is connected to a connecting device via a sealed structure.

[0110] [Figure 5C] This is a schematic diagram of the structure of a first elastic tube according to some embodiments of the present disclosure.

[0111] [Figure 5D] Figure 5C is a schematic diagram of the first elastic tube from a different angle.

[0112] [Figure 5E] Figure 5C is a schematic cross-sectional view of the first elastic tube.

[0113] [Figure 5F] This is a schematic diagram of the structure of a water tank according to some embodiments of the present disclosure.

[0114] [Figure 5G] Figure 5F is a schematic diagram of the water tank from a different angle.

[0115] [Figure 5H] This is a schematic diagram of the structure of a cover plate without a water tank according to some embodiments of the present disclosure.

[0116] [Figure 5I] Figure 5H is a schematic diagram of the structure of the cover plate without the water tank from a different angle.

[0117] [Figure 5J] Figure 5H is a schematic diagram of the structure of the cover plate without the water tank from a different angle.

[0118] [Figure 5K] This is a schematic diagram of a structure in which an elastic sealing edge is provided at the connection position between the main body and the connecting device of a respiratory ventilation device according to some embodiments of the present disclosure.

[0119] [Figure 5L]This is a schematic diagram of a structure in which an elastic pipe is provided with an elastic sealing edge when an elastic pipe according to some embodiments of the present disclosure is connected to a ventilation pipe of a connecting device.

[0120] [Figure 5M] This is a schematic diagram of an enlarged structure of A in Figure 5L relating to some embodiments of the present disclosure.

[0121] [Figure 5N] This is a schematic diagram of a structure in which an elastic sealing edge is provided on a ventilation pipe when an elastic pipe according to some embodiments of the present disclosure is connected to a ventilation pipe of a connecting device.

[0122] [Figure 5O] Figure 5M shows a schematic diagram of a structure in which an elastic tube is provided with a plurality of elastic sealing edges, according to some embodiments of the present disclosure.

[0123] [Figure 6A] This is a schematic diagram of the structure of a water tank according to some embodiments of the present disclosure.

[0124] [Figure 6B] This is a schematic diagram of the structure of the lower water tank housing according to some embodiments of the present disclosure.

[0125] [Figure 6C] This is a schematic diagram of the structure of the upper housing of a water tank according to some embodiments of the present disclosure.

[0126] [Figure 6D] This is a schematic diagram of the structure of another water tank upper housing according to some embodiments of the present disclosure.

[0127] [Figure 6E] This is a schematic diagram of the structure of another water tank upper housing according to some embodiments of the present disclosure.

[0128] [Figure 6F]This is a schematic diagram of the structure of another water tank upper housing according to some embodiments of the present disclosure.

[0129] [Figure 6G] This is a schematic diagram of the structure of another water tank upper housing according to some embodiments of the present disclosure.

[0130] [Figure 6H] This is a schematic diagram of the structure of another water tank upper housing according to some embodiments of the present disclosure.

[0131] [Figure 6I] This is a schematic diagram of the structure of another water tank upper housing according to some embodiments of the present disclosure.

[0132] [Figure 7A] This is an illustrative schematic diagram of the external shape of a water tank according to some other embodiments of the present disclosure.

[0133] [Figure 7B] This is a schematic diagram of an exemplary fitting structure between a push button and a recessed structure according to some embodiments of the present disclosure.

[0134] [Figure 7C] This is a schematic diagram of an exemplary structure of a push button according to some embodiments of the present disclosure.

[0135] [Figure 7D] This is a schematic diagram illustrating the exemplary structure of a push button from a different viewpoint, according to some embodiments of the present disclosure.

[0136] [Figure 7E] This is a schematic diagram of an exemplary structure of a recess according to some embodiments of the present disclosure.

[0137] [Figure 7F] This is a schematic diagram of another exemplary recess structure relating to some embodiments of the present disclosure.

[0138] [Figure 7G] This is a schematic diagram of another exemplary structure of a push button according to some embodiments of the present disclosure.

[0139] [Figure 8A] These are schematic diagrams of exemplary main body and humidifier according to some embodiments of the present disclosure.

[0140] [Figure 8B] This is a schematic diagram of an exemplary liquid level detection device according to some embodiments of the present disclosure.

[0141] [Figure 8C] This is a schematic diagram of an exemplary liquid level detection device relating to some other embodiments of the present disclosure.

[0142] [Figure 8D] This is a schematic diagram illustrating exemplary height differences in some embodiments of the present disclosure.

[0143] [Figure 9A] This is a schematic diagram of the structure of a noise reduction device equipped with a flow detection device according to some embodiments of the present disclosure.

[0144] [Figure 9B] This is a schematic diagram of an exemplary structure of a flow detection device according to some embodiments of the present disclosure.

[0145] [Figure 9C] This is a schematic diagram of an exemplary structure of a flow detection device according to some embodiments of the present disclosure.

[0146] [Figure 10A] This is a schematic diagram illustrating an exemplary structure of the piping system of a respiratory ventilation device according to some embodiments of the present disclosure.

[0147] [Figure 10B] This is a schematic diagram illustrating an exemplary structure of the tubing structure of a respiratory ventilation device according to some embodiments of the present disclosure, viewed from a different angle.

[0148] [Figure 11A] This is an illustrative schematic diagram of the exploded structure of a main body button according to some embodiments of the present disclosure.

[0149] [Figure 11B] This is a schematic diagram of an exemplary structure of a main body housing according to some embodiments of the present disclosure.

[0150] [Figure 12A] These are 3D structural diagrams of buttons shown in some embodiments of this disclosure.

[0151] [Figure 12B] Figure 12A is a front view of the button.

[0152] [Figure 12C] Figure 12A is a bottom view of the button.

[0153] [Figure 12D] Figure 12A is a cross-sectional view of the button.

[0154] [Figure 12E] This is an enlarged view of section A of Figure 12D.

[0155] [Figure 12F] Figure 12A is an exploded view of the button.

[0156] [Figure 12G] This is a 3D structural diagram of a button according to some other embodiments of the present disclosure.

[0157] [Figure 12H] Figure 12G is a front view of the button.

[0158] [Figure 12I] Figure 12G is a bottom view of the button.

[0159] [Figure 12J] Figure 12G is a cross-sectional view of the button.

[0160] [Figure 12K] This is an enlarged view of section B of Figure 12J.

[0161] [Figure 12L] Figure 12G is an exploded view of the button.

[0162] [Figure 12M] This is a 3D structural diagram of a button according to some other embodiments of this specification.

[0163] [Figure 12N] This is a front view of the button in Figure 12M.

[0164] [Figure 12O] Figure 12M is a bottom view of the button.

[0165] [Figure 12P] Figure 12M is a cross-sectional view of the button.

[0166] [Figure 12Q] This is an enlarged view of section C in Figure 12P.

[0167] [Figure 12R] Figure 12P is an exploded view of the button from a different perspective.

[0168] In the diagram, 1000: Respiratory ventilation equipment, 2000: Network, 3000: Terminal, 4000: Processing unit, 5000: Storage device, 6000: breathing Pipe, 7000: User Interface, 8000: User.

[0169] 100: Main unit, 110: Display screen, 1200: Water tank, 1210: Heating device, 1220: Elastic sealing member, 1211: Metal heating plate, 1212: Spacer, 1212-1: Elastic body, 1212-2: Hollow support column, 1213: Heating bottom plate,120: Pipe fitting, 121: Temperature detection device, 130: Power interface, 131: Metal elastic piece, 140: Main body button, 141: Silicone layer, 1411: Positioning hole, 1412: Elastic button, 1413: Button patch, 142: Metal bracket, 1421: Heat melting hole, 1422: Protruding end, 143: Button panel, 1431: Buckle hook.

[0170] 200: Noise reduction device, 210: Intake pipe, 211: Partition member, 212: Intake sub-pipe, 213: Exhaust port, 220: Noise reduction housing, 230: Blower cavity, 231: First intake port, 232: Second intake port, 233: Third intake port, 234: Blower, 235: Blower suspension structure, 235-1: Flexible blower cover, 235-2: Suspension column, 235-21: Flexible locking head, 235-3: Semi-sealed blower cover, 235-4: Support column, 235-5: Semi-sealed blower cover, 235-6: Side mounting column, 235-61: Connecting column, 235-62: Clamping joint, 236: Noise reduction top housing, 236-1: Mounting hole, 240: Gas passage, 241: First space, 242: Second space, 243: Third space, 244: Fourth space, 245: Fifth space , 250: Porous sound-absorbing plate .

[0171] 300: Noise reduction device, 310: Noise reduction housing, 311: Noise reduction top housing, 312: Noise reduction bottom housing, 313: Main outlet, 320: Intake pipe, 321: Exhaust port, 322: Intake port, 330: Blower cavity, 331: Cavity intake port, 332: Water collection cavity, 333: Cavity exhaust port, 340: Gas passage, 350: Blower mounting cavity, 360: Perforated sound-absorbing plate, 361: Perforated top plate, 362: Perforated side plate, 363: Perforated bottom plate, 364: Sound-absorbing holes, 365: First region, 366: Second region, 367: Third region.

[0172] 400: Perforated sound-absorbing plate, 411: Through hole, 412: Second surface, 413: First surface, 414: Through hole side wall, 415: Second opening, 416: First opening.

[0173] 4100: Noise reduction structure, 4110: Noise reduction housing, 4120: Perforated sound-absorbing plate, 4120-2: Second perforated sound-absorbing plate, 4120-3: Third perforated sound-absorbing plate, 4130: Sound-absorbing cotton, 4140: Noise reduction top housing, 4150: Air intake, 4200: Blower assembly, 4210: Blower body, 4211: Blower support column,4220: Blower cavity, 4221: Blower cavity housing, 4222: Cavity intake port, 4223: Cavity exhaust port.

[0174] 4120-1: First porous sound-absorbing plate, 41221: First subplate, 41222: Second subplate, 4121: First surface, 41211: Top surface, 41212: Bottom surface, 4122: Second surface, 4123: Top housing support column, 4124: First partition member, 4125: Second partition member, 4126: Third partition member group, 41261: 1 Low-position third partition member; 41262: 1 High-position third partition member; 41263: 2nd Low-position third partition member, 41264: 2nd High-position third partition member, 4127: fourth partition member group; 41271: first side partition member, 41272: second side partition member; 4128: fifth partition member, 4129: support plate.

[0175] 500: Respiratory ventilation equipment, 510: Main unit, 511: Main unit housing, 512: Housing top wall, 513: Housing bottom wall, 514: First tightening slot, 515: Second tightening slot, 520: Connection device, 521: Ventilation pipe, 521-1: Intake passage, 5211: First intake end, 5212: First exhaust end, 521-2: Exhaust passage, 522: Stopper section, 5221: Second intake end, 5222: Second exhaust end, 523: Guide rib, 524: First stopper, 525: Second stopper P, 526: Top cover, 527: Flow limiting structure, 5271: First flow limiting conduit, 5272: Second flow limiting conduit, 528: First buckle, 529: Second buckle, 530: Sealing structure, 531: Elastic tube, 5311: First elastic tube, 5312: Second elastic tube, 532: Annular projection, 5321: First side wall, 5322: Second side wall, 533: Limit groove, 534: Limit projection, 535: Inlet, 536: Elastic sealing edge, 5361: Middle section, 5362: End section, 537: Connection gap.

[0176] 600: Water tank, 610: Water tank housing, 611: Water tank upper housing, 612: Water tank lower housing, 620: Heat transfer member, 630: Intake passage, 631: Water tank first intake port, 632: Water tank first exhaust port, 633: First bend, 640: Exhaust passage, 641: Water tank second intake port, 642: Water tank second exhaust port, 643: Second bend, 650: Flow guide rib, 651: First flow guide rib, 652: Second flow guide rib, 652-1: Third bend, 660: Sealing plate, 661: Snap, 662: Protrusion.

[0177] 700: Water tank, 710: Water tank housing, 720: Recess structure, 721: Limit groove, 722: Guide groove, 725: Second elastic arm, 725-1: Second fixed end, 725-2: Second free end, 750: Push button, 751: Pressing surface, 751-1: Pressing strip, 752: Connection structure, 752-1: Connecting member, 752-2: Engaging projection, 753: Limit member, 754: Guide member, 754-1: Reinforcement projection, 755: First elastic arm, 755-1: First fixed end, 755-2: First free end, 756: Connecting projection, 757: Fixed structure, 758: Elastic piece mechanism, 760: Elastic material.

[0178] 810: Main body of the respiratory ventilation device, 820: Water tank of the humidifier, 830: Structure of the part connecting the humidifier water tank 820 and the main body of the respiratory ventilation device 810, 811: Side wall of the main body, 821: Side wall of the humidifier, 811-1: Side away from the side wall of the humidifier, 811-2: Side facing the side wall of the humidifier, 821-1: Bottom plate of the humidifier, 8211: First sensor, 8212: Second sensor.

[0179] 900: Noise reduction device, 910: Intake pipe, 920: Noise reduction housing, 930: Blower cavity, 931: Cavity intake port, 940: Gas passage, 950: Flow detection device, 951: low Pressure detection point, 9511: low The lower end of the pressure detection point 951 is connected to a pore, 952, in the gas passage 940: high Pressure detection point, 953: Flow sensor.

[0180] 150: Button, 151: Button body, 151a: Press side, 1511: First button function part, 1511a: First press surface, 1512: Second button function part, 1512a: Second press surface, 1513: Elongated slot, 1514: Projection, 152: Button connection part, 1521: Arc-shaped extension, 1522: Connection hole. [Modes for carrying out the invention]

[0181] The following describes exemplary embodiments or models in detail, with examples shown in the drawings. In the following description, unless otherwise specified, the same reference numerals in the drawings indicate the same components or operations. The embodiments described below are not intended to represent all embodiments consistent with the present disclosure. On the contrary, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure, as detailed in the appended claims.

[0182] The terms used in this disclosure are for illustrative purposes only and are not intended to limit this disclosure. The singular forms “one kind,” “the said,” and “the said” used in this disclosure and the appended claims are also intended to include the plural form unless the context explicitly indicates otherwise.

[0183] It should be understood that the terms "first," "second," etc., used in this disclosure and claims do not indicate any order or importance, but are intended to distinguish different components. Similarly, terms such as "one" or "one" do not indicate a limit on quantity, but indicate the presence of at least one component. Unless otherwise specified, similar terms such as "front," "rear," "bottom," and / or "top" are for illustrative purposes only and are not limited to a single location or spatial direction. Similar terms such as "includes" or "contains" mean that the element or object preceding "includes" or "contains" is covered by the element or object and its equivalents appearing after "includes" or "contains," and do not exclude other elements or objects.

[0184] In modern clinical medicine, respiratory ventilation devices may be effective means of artificially replacing autonomous ventilation function, and may be devices that can replace, control, or modify a person's normal physiological respiration, increase lung ventilation, improve respiratory function, and reduce respiratory work consumption. Respiratory ventilation devices are widely used in respiratory failure due to various causes, anesthetic respiratory management during surgery, respiratory support therapy, and emergency resuscitation, and can occupy a very important position in the field of modern medicine. Respiratory ventilation devices are medical devices that play an important role in the prevention and treatment of respiratory failure, the reduction of complications, and the saving and extension of patients' lives.

[0185] Home-use sleep-type respiratory ventilation devices are primarily used in private homes, sleep centers, and small clinics, and are mainly for patients with sleep apnea syndrome. They require that patients remain asleep throughout the entire treatment process, thus demanding a quiet and suitable surrounding environment. Respiratory ventilation devices treat patients by pressurizing gas within a tubing using a blower. With the increasing emphasis on respiratory therapy, the performance requirements for respiratory ventilation devices are likely to become increasingly stringent. A readily perceptible aspect of respiratory performance may be noise, which can significantly impact the user experience. The main source of noise is likely airflow noise. Noise from gas entering the blower cavity through the cavity intake may account for a large portion of the noise. Noise can also be generated by blower vibration and its own rotation. Therefore, it is necessary to install noise reduction devices to reduce the noise generated during the use of respiratory ventilation devices.

[0186] It should be understood that the application scenarios of the respiratory ventilation devices described herein are merely some examples or embodiments of this disclosure. Those skilled in the art can apply this disclosure to other similar scenarios based on these drawings, without requiring any creative work.

[0187] The respiratory ventilation devices according to embodiments of this disclosure will be described in detail below with reference to Figures 1A to 12R. The following embodiments are for illustrative purposes only and do not limit the scope of this disclosure.

[0188] Figure 1A is a schematic diagram of an exemplary system for a respiratory ventilation device according to some embodiments of the present disclosure. System 10 may be configured to provide a respiratory gas to the user. In some embodiments, the respiratory gas may include natural gas (or atmospheric gas), purified gas, oxygen gas, oxygen-enriched atmospheric gas, therapeutic agent, pressurized gas (oxygen-enriched), humidifier (oxygen-enriched), or a combination thereof. As shown in the figure, System 10 is a respiratory ventilation device 1000, breathing The system may also include a tube 6000 and a user interface 7000. In some embodiments, the respiratory ventilation device 1000 may be a non-invasive respiratory ventilation device, an oxygen therapy device, or any other respiratory support device. In some embodiments, the system 10 may further include a network 2000, a terminal 3000, a processing unit 4000, and a storage device 5000. One or more of the network 2000, terminal 3000, processing unit 4000, and storage device 5000 may be omitted. The components within the system 10 can be connected in various ways. As just one example, as shown in Figure 1A, the respiratory ventilation device 1000 may be connected to the processing unit 4000 via the network 2000. As another example, the respiratory ventilation device 1000 may be directly connected to the processing unit 4000 as shown by the dashed bidirectional arrow linking the respiratory ventilation device 1000 and the processing unit 4000. As yet another example, the storage device 5000 may be connected to the processing unit 4000 directly or via the network 2000. As yet another example, terminal 3000 may be connected to network 2000 directly (for example, as shown by the dashed bidirectional arrow linking terminal 3000 and processing unit 4000) or via network 2000.

[0189] The respiratory ventilation device 1000 may be configured to treat, prevent and / or alleviate respiratory disorders or diseases of the user 8000. In some embodiments, the respiratory ventilation device 1000 may be configured to deliver pressurized breathing gas to the user 8000 (e.g., the user's nose and / or mouth). In some embodiments, the respiratory ventilation device 1000 may include at least one intake and exhaust port (see pipe fitting 120 in Figure 1B). At least one intake port may be configured to introduce outside air into the respiratory ventilation device 1000. The exhaust port is configured to release pressurized gas from the respiratory ventilation device 1000. breathing tube 6000 It may be configured to discharge to a port. In some embodiments, the exhaust port is breathing tube 6000 It may be connected to a. In some embodiments, breathing tube 6000 It may be connected to the user interface 7000. This allows the gas generated by the respiratory ventilation device 1000 to be... breathing tube 6000 It can also be discharged to user 8000 via user interface 7000.

[0190] In some embodiments, the respiratory ventilation device 1000 may include a main body 1100, which may include a pneumatic block configured to generate a high-pressure gas higher than atmospheric pressure. The pneumatic block may be provided with a blower cavity, and a blower may be attached to the blower cavity. A blower is a device for increasing the pressure of a gas and delivering the gas to assist the user's breathing. In some embodiments, the respiratory ventilation device 1000 may include a noise reduction device (see Figures 2A-2D and 3A-3H). In some embodiments, a porous sound-absorbing plate (see Figure 4A-4G) may be configured within the noise reduction device to improve the noise reduction effect of the noise reduction device. In some embodiments, the respiratory ventilation device 1000 may include a sealed structure (see Figure 5A-5J). The sealed structure can be used for a sealed connection between the main body 1100 and a connecting device. The connecting device may include a ventilation pipe that receives the high-pressure gas generated by the main body 1100. In some embodiments, the respiratory ventilation device 1000 may include a water tank (see Figures 1H-1J and 6A-6I) configured to humidify pressurized gas. In some embodiments, the water tank may include a water tank housing and a push button (see Figures 7A-7F) provided on the outer surface of the water tank housing, wherein the push button is configured to detach the water tank from the main body of the respiratory ventilation device when pressed by an external force toward the inside of the water tank housing. In some embodiments, the respiratory ventilation device 1000 may include a liquid level detection device (see Figure 8A-8D) for detecting the liquid level of the humidifier (e.g., water tank) of the respiratory ventilation device. In some embodiments, the noise reduction device within the respiratory ventilation device 1000 may be configured as a flow detection device (see Figure 9A-9C). The flow detection device may be mounted within the noise reduction device so that the airflow forms a differential pressure on both sides along the airflow direction in the flow detection device, and flow detection is achieved using the differential pressure principle.

[0191] In some embodiments, the respiratory ventilation device 1000 may further include one or more controllers. The controllers may be connected directly to one or more components of the respiratory ventilation device 1000 or via a network (e.g., a wired network or a wireless network). The controllers may control the operation of one or more components of the respiratory ventilation device 1000. In some embodiments, the controllers may be configured to activate the respiratory ventilation device 1000 at startup. For example, the controllers may activate the random access memory of the respiratory ventilation device 1000, read one or more parameters from one or more storage devices 5000 (e.g., non-volatile memory) of the respiratory ventilation device 1000, and / or activate a detection module configured to detect one or more parameters related to the system 10. In some embodiments, the parameters may include at least one parameter used to control the pressure of the breathing gas, at least one parameter used to control the humidity of the breathing gas, at least one parameter used to control the temperature of the breathing gas, at least one parameter used to control the concentration ratio of a target gas (e.g., oxygen) in the breathing gas, and at least one parameter used to control the flux of the target gas or the breathing gas. In one embodiment, the controller may be configured as a program that continuously reads information from a detection module and is configured to control the parameters of the breathing gas using at least the information read from the detection module and one or more parameters.

[0192] In some embodiments, the respiratory ventilation device 1000 may further include one or more sensors configured to detect parameters relating to the respiratory gas, the gas exhaled by the user 8000, and / or the operating state of the respiratory ventilation device 1000. Parameters relating to the respiratory gas may include, for example, the flux of the respiratory gas or target gas, the concentration ratio of the target gas in the respiratory gas, the flow rate of the respiratory gas, the temperature of the respiratory gas, the humidity of the respiratory gas, or a combination thereof. Parameters relating to the operating state of the respiratory ventilation device 1000 may include the operating time of the respiratory ventilation device 1000, the delay time for pressurizing the respiratory gas, gas leakage from the pressurized respiratory gas, the input voltage of the gas pressurizing means, or a combination thereof.

[0193] In some embodiments, user 8000 may be a patient. In some embodiments, the patient may have one or more respiratory disorders or diseases. In some embodiments, the characteristics of respiratory disorders or diseases may include apnea, respiratory deprivation, or hyperventilation. Exemplary respiratory disorders or diseases include, for example, obstructive sleep apnea syndrome (OSA), Cheyne-Stokes respiration (CSR), obesity hypoventilation syndrome (OHS), chronic obstructive pulmonary disease (COPD), neuromuscular diseases (NMD), chest wall disorders, and acute respiratory distress syndrome (ARDS).

[0194] In some embodiments, the user interface 7000 may be configured to connect the respiratory ventilation device 1000 to the subject 8000 by, for example, providing a flow of respiratory gas (e.g., gas, oxygen-enriched humidifier). In some embodiments, the subject interface 7000 may include a gas passage for guiding the respiratory gas. The subject interface 7000 may include a mask, a pipe, etc. For example, the user interface 7000 may be a nasal mask, a full-face mask, a pipe connected to the mouth of the user 8000, or a tracheostomy pipe connected to the trachea of ​​the user 8000. In some embodiments, the user interface 7000 may be sealed and connected to the face area of ​​the user 8000 to favor the transport of respiratory gas at a pressure sufficient to affect the treatment by the difference with the ambient pressure (e.g., positive pressure of about 10 cm H2O).

[0195] In some embodiments, the breathing tube 6000 may be configured to guide the respiratory gas from the respiratory ventilation device 1000 to the user interface 7000. The breathing tube 6000 may include a gas passage for guiding the respiratory gas. In some embodiments, the breathing tube 6000 may be sealed to the exhaust port of the respiratory ventilation device 1000. In some embodiments, the breathing tube 6000 may be sealed to the user interface 7000.

[0196] In some embodiments, the network 2000 may include any suitable network that facilitates the exchange of information and / or data within the system 10. In some embodiments, one or more components of the system 10 (e.g., a respiratory ventilation device 1000, a terminal 3000, a processing unit 4000, or a storage device 5000) may transmit information and / or data to one or more other components of the system 10 via the network 2000. For example, the processing unit 4000 may receive signals from the respiratory ventilation device 1000 via the network 2000.

[0197] In another example, the processing unit 4000 may receive user instructions from the terminal 3000 via the network 2000. In some embodiments, the network 2000 may be any type of wired or wireless network, or a combination thereof.

[0198] In some embodiments, terminal 3000 may include a mobile device 3000-1, a tablet computer 3000-2, a laptop computer 3000-3, or any combination thereof. In some embodiments, terminal 3000 can remotely control the respiratory ventilation device 1000. In some embodiments, terminal 3000 can operate the respiratory ventilation device 1000 via a wireless connection. In some embodiments, terminal 3000 can receive information and / or commands entered by a user and transmit the received information and / or commands to the respiratory ventilation device 1000 or the processing unit 4000 via the network 2000. In some embodiments, terminal 3000 can receive data and / or information from the processing unit 4000. In some embodiments, terminal 3000 can display information related to system 10. In some embodiments, terminal 3000 may be part of the processing unit 4000. In some embodiments, terminal 3000 may be omitted. In some embodiments, the user can remotely update the software of the respiratory ventilation device 1000 and / or adjust or set one or more parameters of the respiratory ventilation device 1000 via the terminal 3000.

[0199] In some embodiments, the processing unit 4000 can process data and / or information acquired from the respiratory ventilation device 1000, the terminal 3000, and / or the storage device 5000. For example, the processing unit 4000 can acquire signals detected by one or more sensors in the respiratory ventilation device 1000, the breathing tube 6000, and / or the user interface 7000, and process and / or analyze the signals to acquire one or more parameters related to the respiratory gas, the gas exhaled by the user 8000, and / or the operating status of the respiratory ventilation device 1000.

[0200] In some embodiments, the processing unit 4000 may include an acquisition unit and a processing unit. The acquisition unit may be configured to acquire information about the system 10 (e.g., a respiratory ventilation device 1000, the processing unit 4000, a storage device 5000, a terminal 3000, etc.). The information may include signals detected by a detection module, data read from the storage device 5000, commands or data provided by the terminal 3000, etc. In some embodiments, the information may be transmitted to the processing unit for processing. In some embodiments, the acquisition unit may acquire or transmit information via a tangible transmission medium or a carrier transmission medium.

[0201] In some embodiments, the storage device 5000 may be configured to store data and / or instructions. In some embodiments, the storage device 5000 may be configured to store data or information obtained from the respiratory ventilation device 1000. For example, the processing device 4000 may determine one or more parameters relating to the respiratory gas, the gas exhaled by the subject 8000, and / or the operating state of the respiratory ventilation device 1000 based on signals obtained from one or more sensors of the respiratory ventilation device 1000, the breathing tube 6000, and / or the subject interface 7000. The determined one or more parameters may be stored in the storage device 5000 for further use or processing. In some embodiments, the storage device 5000 may be configured to store data from the terminal 3000 and / or the processing device 4000.

[0202] In some embodiments, the storage device 5000 may store data and / or instructions that the processing device 4000 can execute or that enable the exemplary methods described herein.

[0203] In some embodiments, the storage device 5000 may be connected to a network 2000 to communicate with one or more components of the system 10 (e.g., a respiratory ventilation device 1000, a processing unit 4000, a terminal 3000, etc.). One or more components in the system 10 may access data or instructions stored in the storage device 5000 via the network 2000. In some embodiments, the storage device 5000 may be directly connected to or communicate with one or more components of the system 10 (e.g., a respiratory ventilation device 1000, a processing unit 4000, a terminal 3000, etc.). In some embodiments, the storage device 5000 may be part of the processing unit 4000. In some embodiments, the storage device 5000 may be part of the respiratory ventilation device 1000.

[0204] Figure 1B is a schematic diagram of a respiratory ventilation device according to some embodiments of the present disclosure. Figure 1C is a schematic diagram of the structure of a noise reduction device within a respiratory ventilation device according to some embodiments of the present disclosure. Figure 1D is a schematic diagram of the suspension mounting of the top of the blower within the noise reduction device according to some embodiments of the present disclosure. Figure 1E is a schematic diagram of the support mounting of the bottom of the blower within the noise reduction device according to some embodiments of the present disclosure. Figure 1F is a schematic diagram of the suspension mounting of the side wall of the blower within the noise reduction device according to some embodiments of the present disclosure. Figure 1G is a schematic diagram of the three-dimensional structure of the cross section along the BB direction in Figure 1F. Figure 1H is an exploded schematic diagram of the water tank and heating device of a respiratory ventilation device according to some embodiments of the present disclosure. Figure 1I is an exploded schematic diagram of the water tank and heating device of a respiratory ventilation device according to some other embodiments of the present disclosure. Figure 1J is an exploded schematic diagram of the specific structure of the water tank and heating device of a respiratory ventilation device according to some embodiments of the present disclosure. Figure 1K is a schematic diagram of the elastic support structure of a heating device according to some embodiments of the present disclosure.

[0205] As shown in Figure 1B, embodiments of the present disclosure provide a respiratory ventilation device 1000 including a main body 1100, the main body 1100 may include a pneumatic block configured to generate a high-pressure gas at a pressure higher than atmospheric pressure. The pneumatic block may be provided with a blower cavity, and a blower may be attached to the blower cavity. The blower is for increasing the gas pressure and delivering the gas. The respiratory ventilation device 1000 may further include a water tank 1200. The water tank 1200 may be configured to humidify the pressurized gas so as to humidify the gas inhaled by the user 8000 to improve the user experience.

[0206] In some embodiments, the main unit 1100 may include a display screen 110. The display screen 110 is used for user interaction. For example, the main control chip can display the amount of liquid in the water tank to the user via the display screen 110. For a further description of the main control chip, see the relevant description in Figure 8B. The display screen 110 may be configured to display information regarding the status of the respiratory ventilation device 1000. The information displayed on the display screen 110 may include, for example, the respiratory gas, the gas exhaled by the user 8000, and / or parameters relating to the operating status of the respiratory ventilation device 1000. In some embodiments, the display screen 110 may be configured as an operating interface for the software of the respiratory ventilation device 1000. In some embodiments, the display screen 110 may be a touch panel.

[0207] In some embodiments, the respiratory ventilation device 1000 may further include a piping fitting 120 connected to an external device (e.g., a user interface 7000). For a further description of the piping fitting 120, see the relevant descriptions in Figures 10A and 10B.

[0208] In some embodiments, the respiratory ventilation device 1000 may further include a main unit button 140 (see related descriptions in Figures 11A-11B). The main unit button 140 may include multiple function buttons to allow the user to operate the respiratory ventilation device. In some other embodiments, the respiratory ventilation device 1000 may further include a button 150 (see related descriptions in Figures 12A-12R). By pressing the button 150, the main unit 1100 can be operated to perform operations such as on / off control and parameter setting.

[0209] In some embodiments, the main body 1100 may include a noise reduction device configured to reduce noise generated during the operation of the main body 1100. The noise reduction device includes an intake structure, a noise reduction housing, a blower cavity, and a gas passage. Gas can enter the gas passage through the intake structure, and a gas passage is formed between the side wall of the noise reduction housing and the side wall of the blower cavity, and the gas passage is configured to transport gas. The blower cavity may be provided with at least one cavity intake port along the airflow direction, and gas in the gas passage can enter the blower cavity through the cavity intake port. In some embodiments, the gas passage may be provided so as to surround the outer wall of the blower cavity. The specific structure of the noise reduction device may take various forms, such as the noise reduction device 200 shown in Figure 2A-2D and the noise reduction device 300 shown in Figure 3A-3F. Specific structures will be described below.

[0210] In some embodiments, the noise reduction device includes a porous sound-absorbing plate configured to improve the noise reduction effect of the noise reduction device, and the porous sound-absorbing plate may have through holes along its thickness. Specific structures of the noise reduction device can take various forms; refer to the relevant descriptions in Figures 4A-4G below.

[0211] In some embodiments, a blower 234 may be provided inside the main body 1100, as shown in Figure 1C. The blower 234 may be mounted inside the noise reduction device 200. The blower 234 may be fixed to the bottom, top, or side wall of the noise reduction device 200 by a blower mounting structure. Regardless of how the blower is mounted inside the noise reduction device, the gap between the outer wall of the blower and the inner wall of the noise reduction device can effectively prevent noise generated during the operation of the blower from being transmitted to the outside.

[0212] In some embodiments, the blower mounting structure may include a blower suspension structure, one end of which is connected to the blower and the other end of which is connected to the top of the noise reduction device. In some embodiments, as shown in Figures 1C and 1D, the blower suspension structure 235 may include a flexible blower cover 235-1 and a plurality of suspension columns 235-2. In some embodiments, the flexible blower cover 235-1 may be a sealed structure made of silicone material. The flexible blower cover 235-1 may cover at least a portion of the structure of the blower 234, and the flexible blower cover 235-1 may have at least one opening at the center of the bottom for mounting the blower. If the blower 234 is installed such that its air intake is located at the bottom of the mounting position, and the flexible blower cover 235-1 surrounds the blower 234, an opening of the same size as the air intake at the bottom of the blower 234 may be provided in the flexible blower cover 235-1 to ensure that airflow enters the blower 234 smoothly through the opening at the bottom of the flexible blower cover 235-1, thereby ensuring the normal operation of the blower 234. One end of a plurality of suspension posts 235-2 may be fixedly connected to the flexible blower cover 235-1 (for example, the upper end of the flexible blower cover 235-1), and the other end of the plurality of suspension posts 235-2 may be fixedly connected to the upper space of the noise reduction device 200 in which the blower is located (for example, the noise reduction top housing 236 of the noise reduction device 200). In some embodiments, flexible locking heads 235-21 may be configured at the upper ends of a plurality of suspension columns 235-2, and the plurality of flexible locking heads 235-21 may be removably (e.g., by clamping) fixed to a plurality of mounting holes 236-1 in a noise reduction top housing 236. In some embodiments, as shown in Figure 1D, the flexible locking heads 235-21 may be gourd-shaped materials made of a flexible material (e.g., silicone) and may have a certain deformation capacity. The outer diameters of the upper and lower ends of the gourd-shaped flexible locking heads 235-21 may be larger than the outer diameter of the intermediate section, and the outer diameter of the intermediate section may be slightly larger than the inner diameter of the mounting holes 236-1.When the flexible locking head 235-21 is attached to the corresponding mounting hole 236-1, external force can cause the upper end of the gourd shape of the flexible locking head 235-21 to be pressed and deformed to pass through the mounting hole 236-1, and the mounting hole 236-1 is located outside the middle section of the flexible locking head 235-21, forming an interlocking fit. Because the outer diameters of the upper and lower ends of the gourd shape are larger than the outer diameter of the middle section, the flexible locking head 235-21 can be fixedly connected to the mounting hole 236-1 of the noise reduction top housing 236. If the blower 234 needs to be attached to the noise reduction device 200, the blower 234 is first mounted inside the flexible blower cover 235-1, and then fixedly connected to multiple mounting holes 236-1 of the noise reduction top housing 236 via multiple flexible locking heads 235-21, and then the noise reduction top housing 236 can be connected to the noise reduction bottom housing (e.g., the bottom housing of the noise reduction housing 220). If configured within the noise reduction device 220 by suspension, there may be a certain gap between the outer wall of the flexible blower cover 235-1 and the inner wall of the noise reduction housing (including the noise reduction bottom housing and the noise reduction top housing 236). Suspending the blower 234 inside the noise reduction device 220 can effectively prevent vibration noise generated when the blower 234 rotates from being transmitted to the outside. In some embodiments, there may be at least three suspension columns 235-2, but there may be four, five or six. Multiple suspension posts 235-2 not only ensure the suspension stability of the blower 234 but can also further improve the vibration noise reduction effect of the blower 234. In some embodiments, the multiple suspension posts 235-2 may be integrally molded with the side or top surface of the flexible blower cover 235-1. In some other embodiments, the multiple suspension posts 235-2 may be connected to the side or top surface of the flexible blower cover 235-1 by means of locking, bonding, etc. In some embodiments, the multiple suspension posts 235-2 may be directly provided circumferentially on the side or top of the blower 234.The blower 234 may be suspended within the noise reduction device 220 via a plurality of suspension columns 235. The suspension columns 235-2 may be detachably or permanently connected to the side or top of the blower 234.

[0213] In some embodiments, the blower mounting structure may be a blower bottom support structure. One end of the blower bottom support structure may be fixedly connected to the bottom wall or side wall of the blower 234, and the other end may be fixedly connected to the bottom of the noise reduction device. In some embodiments, as shown in Figure 1E, the blower bottom support structure 235 may include a semi-enclosed blower cover 235-3 and a plurality of support columns 235-4. The center of the bottom of the semi-enclosed blower cover 235-3 may have an opening at least the same size as the air intake at the bottom of the blower 234, and by mounting and supporting the blower 234, it is ensured that airflow enters the blower 234 smoothly through the opening at the bottom of the blower cover 235-3, thereby ensuring the normal operation of the blower 234. The plurality of support columns 235-4 may be fixedly connected to the bottom end face or side wall of the blower cover 235-3. In some embodiments, the support columns 235-4 may be uniformly arranged on the bottom end surface or side wall of the blower cover 235-3, centered on the axis of the blower 234. In some embodiments, there may be at least three support columns 235-4, but there may also be four, five, or six. The multiple support columns 235 not only ensure the stability of support for the blower 234, but can also improve the effect of reducing vibration noise of the blower 234. In some embodiments, the semi-enclosed blower cover 235-3 and the multiple support columns 235-4 may be manufactured from a flexible silicone material, thereby eliminating some of the vibration noise caused by the operation of the blower 234. In some embodiments, the multiple support columns 235-4 may be integrally molded with the bottom end surface of the blower cover 235-3. In some other embodiments, the multiple support columns 235-4 may be connected to the bottom end surface of the blower cover 235-3 by means of locking, bonding, or other methods. In some embodiments, the support columns 235-4 may be directly attached to the bottom or side wall of the blower 234, or the support columns 235-4 may be detachably or permanently connected to the bottom or side wall of the blower 234.

[0214] As shown in Figure 1D, in the noise reduction device of this disclosure, the motor section (made of metal, heavy) of the blower 234 may be located at the top in the vertical direction, and the intake blade section (made of plastic, light) of the blower 234 may be located at the bottom in the vertical direction. Therefore, when the blower 234 is installed, there is a risk that the top will be heavy and the bottom will be light. Therefore, by installing the blower 234 inside the noise reduction device 220 using a suspension method, the installed blower 234 can be made more stable. Since the overall center of gravity of the installed blower 234 itself is at the top (i.e., closer to the motor), the method of suspending the blower 234 from the top inside the noise reduction device 200 further stabilizes the center of gravity of the blower 234 compared to the method of directly fixing the bottom of the blower 234 to the bottom inside the noise reduction device 200 via a plurality of support columns 235-4. Furthermore, the suspension method allows for greater internal space savings in the noise reduction device 200, resulting in a smaller overall size and enabling a compact design for the noise reduction device.

[0215] In some embodiments, the blower mounting structure may include a blower side wall suspension structure. One end of the blower suspension structure may be connected to the blower, and the other end may be connected to the side wall of the noise reduction device. As shown in Figure 1F, the blower bottom support structure 235 may include a semi-enclosed blower cover 235-5 (similar to the blower cover 235-3 in Figure 1E) and a plurality of side mounting columns 235-6. The center of the bottom of the blower cover 235-5 may have an opening at least the same size as the air intake at the bottom of the blower 234, ensuring that airflow enters the blower 234 smoothly through the opening at the bottom of the flexible blower cover 235-1, and ensuring the normal operation of the blower 234 by mounting and supporting the blower 234. In some embodiments, the semi-enclosed blower cover 235-5 and the plurality of side mounting columns 235-6 may be made of a flexible material (e.g., silicone). The flexible blower cover 235-5 can eliminate some of the vibration noise generated when the blower 234 is operating. In some embodiments, the semi-enclosed blower cover 235-5 may be made of a rigid material (e.g., plastic), and at least the portions of the multiple side mounting posts 235-6 connected to the noise reduction device may be made of a flexible material (e.g., silicone). In some embodiments, the multiple side mounting posts 235-6 may extend from the upper end or side wall of the side wall of the semi-enclosed blower cover 235-5, and the blower 234 may be fixed to the internal side wall of the noise reduction device 200 via the side mounting posts 236. In some embodiments, the side mounting posts 235-6 may include a connecting post 235-61 and a clamping joint 235-62 fixedly connected to the outside of the side wall of the blower cover 235-5, the clamping joint 235-62 being fixedly connected to the internal side wall of the noise reduction device 220 in a clamping manner. In some embodiments, the side mounting column 235-6 may be made of a flexible material (e.g., silicone rubber), that is, both the connecting column 235-61 and the clamping joint 235-62 are made of a flexible material, so that the entire side mounting column 235-6 has a certain deformation capacity.In some embodiments, the connecting column 235-61 of the side mounting column 235-6 may be made of a rigid material, and the clamping joint 235-62 may be made of a flexible material so as to have a certain deformation capacity when the clamping joint 235-62 is coupled to the noise reduction device. In some embodiments, the connecting column 235-61 of the side mounting column 235-6 and the blower cover 235-5 may be integrally molded, and the clamping joint 235-62 may be detachably connected to the connecting column 235-61. In some embodiments, the side mounting column 235-6 may be integrally molded with the blower cover 235-5. If it is necessary to attach the blower 234 to the noise reduction device 200 during use, the blower 234 may first be mounted inside the semi-enclosed blower cover 235-5. The blower cover 235-5 may be used for mounting and supporting the blower 234. Furthermore, the blower cover 235-5 may be fixedly connected to a plurality of side mounting holes or grooves in the inner side wall of the noise reduction housing 220 by a plurality of side mounting columns 235-6. In some embodiments, the clamping joint 235-62 may be a flat button shape. In its natural state, the clamping joint 235-62, the connecting column 235-61, and the side wall of the blower cover 235-5 at the connection point may have an H shape. In some embodiments, a restraint fit may be formed between the side mounting column 235-6 and the side mounting hole or groove in the side wall of the noise reduction housing 220 to ensure that the blower 234 is stably suspended within the noise reduction housing 220. When the blower 234 is configured within the noise reduction device 220 by suspension from the side wall, there may be a certain gap between the outer wall of the blower 234 and / or the blower cover 235-5 and the inner wall of the noise reduction housing 220. It will be understood that the blower 234 is suspended in the gas, and vibration noise generated when the blower 234 rotates is effectively prevented from being transmitted to the outside. In some embodiments, there may be at least three, four, five, or six side mounting columns 235-6. Multiple side mounting columns 235-6 not only ensure the suspension stability of the blower 234 but can also further improve the effect of reducing vibration noise of the blower 234.

[0216] In some embodiments, the main body 1100 may include a connecting device that includes a ventilation tube for receiving high-pressure gas. When the respiratory ventilation device 1000 is activated, outside air enters the blower cavity via a noise reduction device. The gas pressurized by the blower enters the connecting device and is ultimately transmitted to an external device (e.g., a user interface 7000).

[0217] In some embodiments, the respiratory ventilation device 1000 may further include a sealing structure for a sealed connection between the main body 1100 and the connecting device. For specific details of the sealing structure, please refer to the description of Figures 5A-5J below.

[0218] In some embodiments, the connecting device may include a water tank or a cover plate without a water tank. In some embodiments, the water tank may be configured to contain a liquid, and a pressurized gas can pass through the water tank to increase humidity. For further details of the water tank, please refer to the relevant descriptions in Figures 6A-6I and 7A-7G below.

[0219] In some embodiments, the water tank 1200 may further include a push button provided on the outer surface of the water tank housing. The push button may be configured such that when pressed by an external force in a direction toward the interior of the water tank housing, the water tank 1200 becomes detachable from the main body 1100. For specific details of the water tank, please refer to the related descriptions in Figures 6A-6I and 7A-7G below.

[0220] In some embodiments, the water tank 1200 may further include a heating device 1210 for heating the liquid in the water tank 1200. In some embodiments, the heating device 1210 may be fixedly connected to the water tank 1200, i.e., the heating device 1210 may be fixed to the water tank 1200. The water tank 1200 shown in this embodiment can be recycled and reused. In some embodiments, the heating device 1210 may be located at the bottom of the water tank 1200 or inside and near the bottom. In some application scenarios, it is necessary to add drugs to the liquid in the water tank 1200. A water tank containing drugs becomes difficult to clean, and one of the heating device 1210 and the water tank may be damaged while the other is reusable. Therefore, in some other embodiments, as shown in Figures 1H and 1I, the heating device 1210 may be configured to be detachably attached to the lower end of the water tank 1200. In some embodiments, the lower end of the water tank 1200 may be open. When the heating device 1210 is detachably attached to the lower end of the water tank 1200 ,water It can be used as the bottom wall of tank 1210.

[0221] In some embodiments, a sealed connection may be formed between the heating device 1210 and the water tank 1200 to prevent leakage of liquid from the water tank 1200. In some embodiments, an elastic sealing member 1220 may be provided at the connection point between the water tank 1200 and the heating device 1210 to seal the connection point. In some embodiments, the elastic sealing member 1220 may be an annular elastic silicone strip, which may be fixed to the water tank 1200 or the heating device 1210 using an adhesive. In some embodiments, as shown in Figure 1H, the elastic sealing member 1220 may be fixedly connected to the water tank 1200, and the elastic sealing member 1220 may be provided with at least one projection. When the heating device 1210 is attached to the lower end of the water tank 1200, the projection may protrude toward the inner wall of the heating device 1210. At least one projection increases the frictional force at the connection point between the elastic sealing member 1220 and the heating device 1210, thereby improving the heating device 1210 It is used to prevent the detachment of the elastic sealing member 1220. In some other embodiments, as shown in Figure 1I, the elastic sealing member 1220 may be fixedly connected to the heating device 1210, and the elastic sealing member 1220 may be provided with at least one projection. When the heating device 1210 is attached to the lower end of the water tank 1200, the direction of the projection may be toward the outer wall of the connection point at the lower end of the water tank 1200. At least one projection increases the frictional force at the connection point between the elastic sealing member 1220 and the water tank 1200, and the heating device 1210 This prevents them from falling off.

[0222] By configuring the main unit 1100 and the water tank 1200 as separate components and connecting them detachably, the water tank 1200 can be a reusable water tank or a disposable water tank, thereby solving the problem of difficulty in cleaning and refilling the water tank 1200.

[0223] In some embodiments, as shown in Figures 1J and 1K, the heating device 1210 may be located on the main body 1100 corresponding to the water tank 1200. The heating device 1210 may include a metal heating plate 1211, a spacer 1212, and a heating bottom plate 1213 assembled from top to bottom. The heating bottom plate 1213 may be used as the bottom housing of the heating device 1210 or may be considered part of the bottom housing of the main body 1100. The heating bottom plate 1213 may be manufactured from a plastic material (e.g., a integrally molded plastic bottom plate). As shown in Figure 1J, the metal heating plate 1211, the spacer 1212, and the heating bottom plate 1213 may be assembled from top to bottom to form the entire heating device 1210. The heating device 1210 may be fixed to the bottom of the water tank 1200 by removable connections, such as snap connections or screw connections. An elastic portion is provided on the side of the spacer 1212 that corresponds to the metal heating plate 1211, thereby achieving elastic support for the metal heating plate 1211.

[0224] In some embodiments, as shown in Figure 1K, the elastic portion of the spacer 1212 may include a plurality of elastic bodies 1212-1 on the side of the spacer 1212 facing the metal heating plate 1211. At least the upper end region of the elastic bodies 1212-1 may be made of a flexible material (e.g., silicone) and may have a certain deformation capacity. The lower ends of the plurality of elastic bodies 1212-1 may be fixedly connected to the surface of the spacer 1212 (the side of the spacer 1212 facing the metal heating plate 1211), and the upper ends of the plurality of elastic bodies 1212-1 may be in contact with the metal heating plate 1211. In some embodiments, as shown in Figure 1K, there may be four elastic bodies 1212-1, or other numbers, such as two, three, five, six, etc. The number of elastic bodies 1212-1 may be designed according to the shape and size of the outer contour of the spacer 1212, and the plurality of elastic bodies 1212-1 are supported in correspondence. metalThe spacers may be installed at equal intervals along the contour of the heating plate 1211. In some embodiments, the upper end of the elastic body 1212-1 may be provided as a tapered structure, and the lower end of the elastic body 1211-1 may be provided as a hollow support column 1212-2. The outer contour cross-section of the support column 1212-2 may be set to any other shape such as circular, rectangular, or elliptical, and the specific shape is determined according to the actual space or other needs. The support column 1212-2 may correspond to one side of the heating base plate 1213, i.e., the surface of the spacer 1212 facing the heating base plate 1213 may be recessed inward so that the support column 1212-2 forms a hollow structure. A projection 1213-1 may be provided on the surface of the heating base plate 1213 facing the spacer 1212, corresponding to the support column 1212-2. When the heating base plate 1213 is assembled with the spacer 1212, the hollow structure of the support column 1212-2 may be assembled and connected accordingly with the projection 1213-1. When the heating device 1210 of this embodiment is attached to the main body 1100, the deformation capacity of the tapered structure of the multiple elastic bodies 1212-1 allows the metal heating plate 1211 to have space to move up and down. When the push button 750 shown below receives a downward external force to attach the water tank 1200 to the main body 1100 or to remove the water tank 1200 from the main body 1100, the metal heating plate 1211 can move downward by a certain distance due to the pressure of the water tank 1200, facilitating the smooth attachment and removal of the water tank 1200. When the heating device 1210 is assembled independently, the heating device 1210 and the main body 1100 are first assembled by engaging the support column 1212-2 in the spacer 1212 with the cylindrical projection 1213-1 in the heating base plate 1213. During the overall assembly, the main body 1100 can be turned upside down, and the metal heating plate 1211 can be placed in the corresponding opening of the main body 1100. The opening of the main body may be smaller than the metal heating plate 1211 in the longitudinal direction of the metal heating plate 1211. Limit grooves may be provided on the corresponding edges of the opening of the main body and positioned in the longitudinal direction of the metal heating plate 1211 to allow escape from the opening.The width of the opening may be greater than or equal to the width of the metal heating plate 1211 so that the metal heating plate 1211 can be completely exposed in the width direction and a certain amount of torsional displacement can occur due to the elasticity of the spacer 1212. After the metal heating plate 1211 is assembled, the assembled spacer 1212 and the heating bottom plate 1213 may be arranged on the metal heating plate 1211. Finally, the heating bottom plate 1213 may be locked to the corresponding opening of the main body 1100 and finally assembled and fixed to the main body 1100 by screws.

[0225] In some embodiments, in order to better protect the metal heating plate 1211 and prevent the influence of the deformation of the metal heating plate 1211 on the service life of the metal heating plate 1211, the spacer 1212 may be made of an elastic material (for example, silicone) as a whole.

[0226] In some embodiments, the breathing ventilator 1000 may further include a liquid level detection device configured to detect the liquid level of a humidifier (for example, the water tank 1200) in the breathing ventilator 1000. For specific details of the liquid level detection device, please refer to the related descriptions in FIGS. 8A-8D described later.

[0227] In some embodiments, the noise reduction device in the breathing ventilator 1000 may be provided with a flow rate detection device mounted therein, which forms a differential pressure on both sides along the air flow direction of the flow rate detection device, and realizes flow rate detection by using the differential pressure principle. For specific details of the flow rate detection device, please refer to the related descriptions in FIGS. 9A-9C described later.

[0228] FIG. 2A is a 3D schematic view of the structure of a noise reduction device (without the noise reduction top housing) according to some embodiments of the present disclosure. FIG. 2B is a top schematic view of the structure of a noise reduction device (without the noise reduction top housing) according to some embodiments of the present disclosure.

[0229] In some embodiments, referring to Figures 2A and 2B, the noise reduction device 200 may include an intake structure, a noise reduction housing 220, a blower cavity 230, and a gas passage 240. The intake structure may be connected to an external transmission gas (e.g., a gas) and configured to introduce the gas into the noise reduction device 200 via the intake structure. The blower cavity 230 may be configured to house a blower 234. In some embodiments, the noise reduction housing 220 may include a noise reduction top housing and a noise reduction bottom housing, and the noise reduction top housing may be fixedly connected to the noise reduction bottom housing by means of screw connections or the like. To facilitate the display of the internal structure of the noise reduction device 200, neither Figure 2A nor Figure 2B shows the noise reduction top housing attached, and the noise reduction housing 220 in the figures shows only the noise reduction bottom housing. In some embodiments, the noise reduction housing 220 may include only the noise reduction bottom housing, and a matching noise reduction top housing may be integrated into the body of the respiratory ventilation device.

[0230] Referring to Figure 2B, the gas passage 240 may be provided between the inner wall of the noise reduction housing 220 and the outer wall of the blower cavity 230. The gas passage 240 may be configured to transmit gas supplied from the intake structure, and the gas traveling along the gas passage 240 can form an airflow. The blower cavity 230 may be provided with at least two cavity intake ports along the airflow direction. The gas enters the gas passage 240 via the intake structure and then enters the blower cavity 230 via at least two cavity intake ports. By using at least two cavity intake ports to divert the gas in the gas passage 240 and direct it into the blower cavity 230, gas turbulence can be reduced. In this way, noise entering the blower cavity 230 can be effectively reduced.

[0231] In some embodiments, the blower cavity 230 may have two cavity intakes along the airflow direction. In some embodiments, the two cavity intakes may be located at opposite ends of the gas passage 240 such that the distance between the two cavity intakes is large. Gas can enter the gas passage 240 from the cavity intake structure. Some gas can enter the blower cavity 230 through the cavity intake provided at the beginning of the gas passage 240, while other gas can enter the blower cavity 230 through other cavity intakes provided at the end of the gas passage 240 as it advances along the gas passage 240. As part of the airflow flows through the long gas passage 240, noise can be gradually reduced by the gas passage 240, providing a noise reduction effect.

[0232] In some embodiments, the blower cavity 230 may be provided with three cavity intake ports in the airflow direction. In some embodiments, the three cavity intake ports may be located at the beginning, middle, and end of the gas passage 240. In some embodiments, the distance between any two of the three cavity intake ports may be designed to be equal or unequal depending on conditions such as the gas resistance and gas pressure in the gas passage 240.

[0233] In some embodiments, the gas passage 240 has at least three spaces in a direction along the airflow direction, and each space may be distributed in the order of a large cavity followed by a small cavity, and at least two cavity intake ports may be provided in at least two large cavity spaces adjacent to the small cavity.

[0234] In some embodiments, the gas passage 240 may include at least a first space 241, a second space 242, and a third space 243 in the airflow direction. In Figure 2B, the gas passage 240 is divided into the first space 241, the second space 242, and the third space 243 by two dashed lines. In some embodiments, as seen from the plan view shown in Figure 2B, the first space 241 may be located at the beginning of the gas passage 240 and may be mainly formed by the left side wall of the noise reduction housing 220, the lower side wall of the noise reduction housing 220, and the outer wall of the blower cavity 230. In some embodiments, the second space 242 may be located at the intermediate stage of the gas passage 240 and may be mainly formed by the lower side wall of the noise reduction housing 220 and the outer wall of the blower cavity 230. In some embodiments, the third space 243 may be located at the end of the gas passage 240 and may be mainly formed by the lower wall of the noise reduction housing 220, the right wall of the noise reduction housing 220, and the outer wall of the blower cavity 230. In some embodiments, the second space 242 may be located on both sides from the midpoint of the entire length of the lower wall of the noise reduction housing 220, and the length of the second space 242 along the airflow direction of the gas passage 240 may be 1 / 4 to 1 / 3 of the entire length of the lower wall of the noise reduction housing 220. The two dashed lines in the figure are merely rough divisions and are for interpretation purposes only, and do not limit the disclosure. The first space 241 may be larger than the second space 242, and the second space 242 may be smaller than the third space 243. In some embodiments, in a plan view, the first space 241, the second space 242, and the third space 243 may form a "large-small-large" spatial change in the cross-sectional area.

[0235] With respect to the second space 242, the first space 241 and the third space 243 may have larger planar cross-sectional areas, and the airflow may experience less resistance in spaces with larger planar cross-sectional areas and greater resistance in spaces with smaller planar cross-sectional areas. When airflow flows through the first space 241, second space 242, and third space 243, where the spaces change in a "large-small-large" manner, noise of different frequencies can be reduced, and airflow noise can be gradually reduced. For ease of understanding, this disclosure refers to the first space 241 and the third space 243, which have relatively large cross-sectional areas, as large cavities, and the second space 242, which has a relatively small cross-sectional area, as small cavities. In some embodiments, the planar cross-sectional area of ​​the first space 241 may be 1.1 to 5 times the planar cross-sectional area of ​​the second space 242, and the third space 243 may be 1.1 to 5 times the planar cross-sectional area of ​​the second space 242. The blower cavity 230 may have at least a first intake port 231 and a second intake port 232. The first intake port 231 may be located in a first space 241, and the second intake port 232 may be located in a third space 243. The first intake port 231 and the second intake port 232 may be understood as being located in two large cavities. The noise reduction device 200 of this embodiment can use at least two cavity intake ports (first intake port 231 and second intake port 232) to divert the airflow into the blower cavity 230, thereby avoiding turbulent effects on the airflow and allowing the airflow to enter the blower cavity 230. In this way, the noise of the airflow entering the blower cavity 230 is reduced, and the cavity intake ports at different locations can remove noise in different frequency bands, thereby achieving noise reduction. Noise reduction is a process that achieves noise reduction by causing changes in impedance during the propagation of sound waves, thereby generating acoustic energy interference, reducing the acoustic energy radiated to the outside, and creating mutations in the cross-section of the pipe or lateral resonant cavities within the pipe.

[0236] Figure 2C is a schematic top view of the structure of a noise reduction device (without a noise reduction top housing) according to some embodiments of the present disclosure.

[0237] In some embodiments, referring to Figure 2C, the gas passage 240 may further include a fourth space 244 and a fifth space 245 in the airflow direction. In Figure 2C, three dashed lines are used to divide the gas passage 240 into a first space 241, a second space 242, a third space 243, a fourth space 244, and a fifth space 245 in the airflow direction. It should be noted that the three dashed lines in the figure are merely rough divisions of space and are for illustrative purposes only, and do not limit the disclosure. The fourth space 244 may be smaller than the third space 243, and the fifth space 245 may be larger than the fourth space 244. Further explanation of the fourth space 244 and the fifth space 245 is omitted here, as it is described above in reference to the second space 242 and the third space 243. In this embodiment, the gas passage 240 has a first space 241, a second space 242, a third space 243, a fourth space 244, and a fifth space 245 in the direction of airflow. The second space 242 and the fourth space 244 may have relatively small cross-sectional areas in plan view, while the first space 241, the third space 243, and the fifth space 245 may have relatively large cross-sectional areas in plan view. As a result, in plan view, the first space 241, the second space 242, the third space 243, the fourth space 244, and the fifth space 245 can form a spatial change of "large-small-large-small-large" in their cross-sectional areas. The second space 242 and the fourth space 244, which have small cross-sectional areas in plan view, may be small cavities, while the first space 241, the third space 243, and the fifth space 245, which have large cross-sectional areas in plan view, may be large cavities.

[0238] In some embodiments, with reference to Figure 2C, the blower cavity 230 may further include a third intake port 233 located in the fifth space 245. That is, the blower cavity 230 of the noise reduction device 200 in this embodiment may be provided with three intake ports: a first intake port 231 located in the first space 241, a second intake port 232 located in the third space 243, and a third intake port 233 located in the fifth space 245. The noise reduction device 200 in this embodiment uses the three cavity intake ports to divide the airflow into the blower cavity 230, and the different locations of the cavity intake ports can remove noise in different frequency bands, further improving the noise reduction effect.

[0239] In some embodiments, the gas passage 240 may further include a sixth space and a seventh space in the airflow direction (these embodiments are not shown schematicly). The sixth space may be smaller than the fifth space, and the seventh space may be larger than the sixth space. In these embodiments, the gas passage 240 may form an annular gas passage surrounding the outer circumference of the blower cavity 230, and the gas passage 240 may be divided into seven spaces in the airflow direction to form a spatial change of "large-small-large-small-large-small-large". The blower cavity 230 may further include a fourth air intake provided in the seventh space. In other words, the blower cavity 230 of the noise reduction device 200 in this embodiment may be provided with four intake ports: a first intake port 231 located in the first space 241, a second intake port 232 located in the third space 243, a third intake port 233 located in the fifth space 245, and a fourth intake port located in the seventh space. The noise reduction device 200 in this embodiment uses the four cavity intake ports to divide the airflow into the blower cavity 230, and the cavity intake ports at different locations can remove noise in different frequency bands, further improving the noise reduction effect.

[0240] In some embodiments, with reference to Figure 2A, the intake structure may include an intake pipe 210. The intake pipe 210 may be a hollow conduit structure. In some embodiments, the intake pipe 210 may be a conduit structure with a circular cross-section. In some embodiments, the intake pipe 210 may be a conduit structure with a square cross-section. One or more partition members 211 may be provided inside the conduit of the intake pipe 210 to divide the intake pipe 210 into two or more intake sub-pipes 212. When airflow flows through a circular conduit structure with a large cross-section, vortices are easily generated, which generates more noise. By dividing the intake pipe 210 into multiple intake sub-pipes 212, the airflow can be divided into multiple long, flat flows, thus reducing the noise generated when gas flows through the intake pipe 210 depending on its structural design.

[0241] In some embodiments, the intake pipe 210 may have a "single-line" partition member 211 inside which the intake pipe 210 is divided into two intake sub-pipes 212. 0 is , Inside it, The intake pipe 210 may have a "cross-shaped" partition member 211 that divides it into four intake sub-pipes 212.

[0242] In some embodiments, referring to Figure 2A, the partition member 211 inside the intake pipe 210 divides the intake pipe 210 into nine intake sub-pipes 212 in a "grid-like" configuration. "of You may have it.

[0243] In some embodiments, the partition members 211 inside the intake pipe 210 are "concentric" in shape, and the intake pipe 210 may be divided into a plurality of concentric annular intake sub-pipes 212.

[0244] In some embodiments, the partition member 211 inside the intake pipe 210 may have a hexagonal honeycomb shape, and the intake pipe 210 may be divided into a plurality of hexagonal honeycomb-shaped intake sub-pipes 212.

[0245] In some embodiments, referring to Figures 2B and 2C, the intake pipe 210 may be located within the noise reduction housing 220 in the horizontal direction, the dashed line M in the figures may represent the centerline of the intake pipe 210 (for example, if the intake pipe 210 is circular, the dashed line M is the axis of the intake pipe 210), the dashed line N may be parallel to the outer wall of the blower cavity 230 located in the first space 241, or to the tangential direction of the outer wall of the blower cavity 230, and the angle between the dashed line M and the dashed line N may be θ. The angle θ may be less than 90°, and the first space 241 may be approximately triangular in plan view. The airflow direction in the intake pipe 210 may flow from the outside to the first space 241 along the dashed line M. The airflow may be configured to collide with the outer wall of the blower cavity 230 provided in the first space 241, and the airflow may flow into the second space 242 along the direction of the dashed line N, and the airflow may be redirected within the first space 241, with the redirection angle of the airflow being greater than 90°. In some embodiments, a redirection of 180°-θ occurs within the first space 241. When the airflow changes direction during the airflow transmission period, the sound waves of the airflow can cancel each other out to some extent, removing some noise in that frequency band and reducing noise during the airflow transmission period.

[0246] It should be noted that the actual flow direction of the airflow in the intake pipe 210 and the gas passage 240 may be complex, and the two dashed lines in Figures 2B and 2C are merely illustrative flow directions drawn to better understand this disclosure, and are for interpretive purposes only, and do not limit this disclosure.

[0247] In some embodiments, referring to FIGS. 2A to 2C, the end face of the exhaust port 213 of the intake pipe 210 is perpendicular to the central axis of the intake pipe 210. In some embodiments, the bottom surface of the noise reduction housing 220 is horizontal, and the intake pipe 210 may be provided in the housing 220 parallel to the bottom surface. The end face of the exhaust port 213 of the intake pipe 210 may be perpendicular to the bottom surface of the noise reduction housing 220. At the same time, the side walls (including the inner wall and the outer wall) of the noise reduction housing 220 and the outer wall of the blower cavity 230 may also be perpendicular to the bottom surface of the noise reduction housing 220. A substantially triangular space may be formed by the end face of the exhaust port 213 of the intake pipe 210, the side walls of the noise reduction housing 220, and the outer wall of the blower cavity 230. The air flow exits from the exhaust port 213 of the intake pipe 210 and is blocked by the side wall of the noise reduction housing 220 and the outer wall of the blower cavity 230. Therefore, some of the air flow turns and flows to the first intake port 231, and some of the other air flow turns and flows to the second intake port 232 and / or the third intake port 233 along the gas passage 240. In this embodiment, at least two types of flow direction reversals occur in the first space 241, and when the direction is changed, the sound waves of the air flow can be partially canceled, thereby removing some of the noise in the frequency band and reducing the noise during air flow transmission.

[0248] In some embodiments, the space between the end face of the exhaust port 213 of the intake pipe 210 and the outer wall of the blower cavity 230 may be smaller. When the air flow flows out from the exhaust port 213 of the intake pipe 210, two types of reverse flow divergences quickly occur in the small triangular space, and the sound waves quickly turn in the narrow triangular space and can partially cancel each other, thereby effectively removing some of the noise in the frequency band. <{

[0249] In some embodiments, the maximum position height in the vertical direction of the exhaust port 213 of the intake pipe 210 may be smaller than the minimum position height in the vertical direction of the first intake port 231 and the second intake port 232. In some embodiments, referring to FIG. 2A, the intake pipe 210 may be disposed at a position close to the bottom surface of the noise reduction housing 220.

[0250] In some embodiments, referring to Figure 2A, the highest vertical position height of the exhaust port 213 of the intake pipe 210 may be smaller than the lowest vertical position height of the first intake port 231, the second intake port 232, and the third intake port 233.

[0251] Referring to Figure 2A, if the highest position height of the exhaust port 213 of the intake pipe 210 in the vertical direction is less than the lowest position height of the first intake port 231, the second intake port 232 and / or the third intake port 233 in the vertical direction, the shielding between the side wall of the noise reduction housing 220 and the outer wall of the blower cavity 230 allows some of the airflow in the intake pipe 210 to be redirected upward and flow to the first intake port 231, while other portions of the airflow are redirected to the right and flow along the gas passage 240 to the second intake port 232 and / or the third intake port 233. This structural design allows the direction of gas sound waves to be changed within the space formed between the end face of the exhaust port 213 of the intake pipe 210, the side wall of the noise reduction housing 220 and the outer wall of the blower cavity 230, thereby reducing noise through reflection or interference of sound waves.

[0252] In some embodiments, a blower 234 may be provided inside the blower cavity 230. The base portion of the blower 234 may be provided in the lower half of the blower cavity 230, and the motor portion of the blower 234 may be provided in the upper half of the blower cavity 230. The base portion of the blower 234 may be configured to support and stabilize the motor portion of the blower 234, and to reduce vibrations of the motor portion in order to reduce noise.

[0253] In some embodiments, the vertical position height of the first intake port 231 and the second intake port 232 may be close to the motor section of the blower 234 in the blower cavity 230, and away from the base section of the blower 234, i.e., away from the intake ports located at the bottom of the blower 234. When the airflow enters the blower cavity 230 through the first intake port 231 and the second intake port 232, the airflow flows from top to bottom, first cooling the motor section of the blower 234, whose vertical height is similar to the height of the intake ports, thereby maintaining the blower 234 within an appropriate temperature range and ensuring better operating performance. The airflow eventually enters the blower 234 through an intake port located below the motor section of the blower 234.

[0254] In some embodiments, the vertical position height of the first intake port 231, the second intake port 232, and the third intake port 233 may be close to the motor portion of the blower 234 in the blower cavity 230 and farther away from the base portion of the blower 234. When airflow enters the blower cavity 230 through the first intake port 231, the second intake port 232, and the third intake port 233, the airflow can flow from top to bottom to cool the blower 234, thereby maintaining the blower 234 within an appropriate temperature range and ensuring better operating performance.

[0255] Figure 2D is a schematic top view of the structure of a noise reduction device (without a noise reduction top housing) according to some other embodiments of the present disclosure.

[0256] In some embodiments, a porous sound-absorbing plate 250 and / or sound-absorbing cotton may be provided in the gas passage 240. For a detailed explanation of the specific structure of the porous sound-absorbing plate 250, please refer to Figures 3E to 3F and Figures 4A to 4F, and the explanation will be omitted here.

[0257] In some embodiments, the noise reduction device 200 may further include a main outlet (not shown) for transmitting pressurized high-pressure gas, connected to a ventilation pipe (inspiration passage 521-1, described later) of a water tank or cover plate without a water tank located downstream of the gas passage of the noise reduction device 200 inside the respiratory ventilation equipment. Finally, the main outlet may be connected to an external user interface 7000. The gas pressurized by the blower is used to substitute, control, or modify the autonomic respiratory movement of the human body. In some embodiments, the main outlet may be connected via a sealed structure to a ventilation pipe of a connection device (including a water tank or cover plate without a water tank) downstream of the gas passage, thereby effectively avoiding gas leakage at the connection point. A description of the specific structure of the sealed structure is omitted here and should be seen in Figures 5A to 5J.

[0258] In the above embodiment, the gas passage of the noise reduction device in the respiratory ventilation equipment employs a design with a distribution of large and small cavity spacings. In this way, as the airflow flows through spaces with different sizes in the plan view cross-sectional area of ​​the gas passage, noise of different frequencies can be absorbed, and the noise as the airflow flows can be gradually reduced. The noise reduction device may also be configured to divert air to the blower cavity using at least two cavity intake ports, thereby reducing the effects of turbulence in the airflow and reducing noise as the airflow enters the blower cavity, and cavity intake ports at different locations can remove noise in different frequency bands. The intake tube may be divided into multiple intake sub-tubes that divert the airflow into multiple long, flat streams. This structural design can reduce the noise generated when air flows through the intake tube. When air enters the first space from the intake pipe, the airflow changes direction at an angle greater than 90° within the first space, and as the airflow changes direction, some of the sound waves of the airflow can cancel each other out, thereby removing some of the noise in that frequency band and reducing noise during airflow transmission. At least two cavity intake ports in the noise reduction device may be positioned vertically in the blower cavity, close to the motor section of the blower, allowing the airflow to flow from top to bottom to cool the blower, maintaining the blower within an appropriate temperature range and ensuring better operating performance.

[0259] Figure 3A is a schematic 3D diagram of the structure of a noise reduction device according to some other embodiments of the present disclosure. Figure 3B is a schematic 3D diagram of the structure of a noise reduction device (without a noise reduction top housing) according to some other embodiments of the present disclosure.

[0260] In some embodiments, referring to Figures 3A and 3B, the noise reduction device 300 may include a noise reduction housing 310, an intake structure, and a blower cavity 330. The intake structure may be in the form of an intake pipe 320. The blower cavity 330 may be provided within the noise reduction housing 310. A gas passage 340 may be formed between the inner wall of the noise reduction housing 310 and the outer wall of the blower cavity 330. The intake pipe 320 may be connected to an external transport gas (e.g., a gas) and configured to guide the gas into the noise reduction device 300 via the intake pipe 320. The gas passage 340 may be configured to allow the gas delivered from the intake pipe 320 to pass through. The blower cavity 330 may be configured to house a blower. In some embodiments, referring to Figure 3A, the noise reduction housing 310 may include a noise reduction top housing 311 and a noise reduction bottom housing 312. The noise reduction top housing 311 may be fixedly connected to the noise reduction bottom housing 312 by screw connections or the like, and the blower cavity 330 and gas passage 340 may be integrated within the noise reduction housing 310.

[0261] Figure 3C is a schematic top view of the structure of a noise reduction device (without a noise reduction top housing) according to some other embodiments of the present disclosure. Figure 3D is a schematic front view of the structure of the internal cavity of the intake pipe of a noise reduction device according to some other embodiments of the present disclosure.

[0262] To facilitate the illustration of the internal structure of the noise reduction device 300, Figure 3B does not show the noise reduction top housing 311. Referring to Figures 3B and 3C, the gas passage 340 may be provided so as to surround the outer wall of the blower cavity 330. In some embodiments, a blower mounting cavity 350 may be provided inside the blower cavity 330. The blower mounting cavity 350 may be configured to mount a blower.

[0263] In some embodiments, the cavity formed by the outer wall of the blower cavity 330, the inner wall of the noise reduction housing 310, the upper surface of the noise reduction bottom housing 312, and the lower surface of the noise reduction top housing 311 may be a gas passage 340. In some embodiments, the gas passage 340 may be a gas passage structure independently provided between the inner wall of the noise reduction housing 310 and the outer wall of the blower cavity 330. Referring to Figure 3C, outside air (e.g., gas) enters the gas passage 340 from the intake pipe 320, and can form an airflow having a predetermined flow direction within the gas passage 340 (indicated by the dashed arrow in Figure 3C). Note that the actual flow direction in the gas passage 340 may be complex, and the dashed arrow in Figure 3C is an illustrative flow direction reference drawn to better understand this disclosure and is not limiting to this disclosure.

[0264] In some embodiments, referring to Figure 3C, in a plan view, the outer wall portion of the blower cavity 330 may be part of a circle, the inner wall portion of the noise reduction housing 310 may be part of a roughly circular shape, and the gas passage 340 may be part of a concentric ring.

[0265] The shape of the gas passage 340 may be determined primarily by the shape of the outer wall of the blower cavity 330 and the shape of the inner wall of the noise reduction housing 310. In some embodiments, in plan view, the shape of the gas passage 340 may be part of a cavity formed by an inner circle and an outer circle. In some embodiments, the shape of the gas passage 340 may be part of a cavity formed by an inner and an outer circle. In some embodiments, the shape of the gas passage 340 may be part of a cavity formed internally and externally by two other forms of polygons.

[0266] The gas passage 340 may be configured not only to deliver the gas entering from the intake pipe 320 into the blower cavity, but also to reduce noise caused by the airflow. As the gas flows through the gas passage 340, the gas passage can gradually reduce the noise and thus play a role in noise reduction. The annular gas passage may be designed to increase the length of the gas passage 340, and the longer the gas passage 340, the better the noise reduction effect. By installing the gas passage 340 so as to surround the outside of the blower cavity 330, the noise caused by the blower operation inside the blower cavity 330 can be reduced as the annular gas passage 340 reduces noise caused by the internal airflow.

[0267] In some embodiments, the intake pipe 320 may have an exhaust port 321. The exhaust port 321 may be located at the beginning of the gas passage 340, and a cavity intake port 331 may be provided in the blower cavity 330. The cavity intake port 331 may be located on the side wall of the blower cavity 330 at the end of the gas passage 340. The cavity intake port 331 allows communication between the gas passage 340 and the interior of the blower cavity 330. Outside air (e.g., gas) enters through the intake pipe 320 and into the gas passage 340 through the exhaust port 321, and the airflow flows along the arc-shaped (may be part of a ring) gas passage 340 and into the blower cavity 330 through the cavity intake port 331.

[0268] The length of the gas passage 340 is determined by the angle between the first connecting line connecting the center of the gas passage 340 to the exhaust port 321 and the second connecting line connecting the cavity intake port 331 to the center of the gas passage 340, along the extension direction of the gas passage 340. The longer the length of the gas passage 340, the better the noise reduction effect of the noise reduction device. Therefore, the angle between the first connecting line connecting the center of the gas passage 340 to the exhaust port 321 and the second connecting line connecting the cavity intake port 331 to the center of the gas passage 340, along the extension direction of the gas passage 340, may be designed according to the required length of the gas passage 340. The length of the gas passage 340 may also be designed according to the required noise reduction level and may be specifically adjusted according to the air resistance of the airflow in the gas passage 340, atmospheric pressure, and other requirements.

[0269] In some embodiments, referring to Figure 3C, the center of the fan cavity 330 and the center of the gas passage 340 may coincide in a plan view. The angle between the first connecting line (e.g., dashed line M in Figure 3C) connecting the exhaust port 321 of the intake pipe 320 and the center (i.e., center) of the gas passage 340, and the second connecting line (e.g., dashed line N in Figure 3C) connecting the cavity intake port 331 and the center (i.e., center) of the gas passage 340, along the extension direction of the gas passage 340, may be greater than 180°. The arc shape formed by the gas passage 340 along the outer wall portion of the fan cavity 330 may be understood to be greater than half the circle. As shown in the embodiment, the gas passage 340 of the noise reduction device 300 may have an arc shape slightly larger than a semicircle, and the extending arc-shaped gas passage 340 can have a sufficient noise reduction effect, and the noise reduction device 300 can have a smaller volume.

[0270] In some embodiments, the angle between a first connecting line (e.g., dashed line M in Figure 3C) connecting the exhaust port 321 of the intake pipe 320 and the center (i.e., the center of the circle) of the gas passage 340, and a second connecting line connecting the cavity intake port 331 and the center (i.e., the center of the circle) of the gas passage 340, along the direction of extension of the gas passage 340, may be greater than 240°. The arc shape formed along the outer wall of the blower cavity 330 of the gas passage 340 may be understood to be greater than two-thirds of a circle.

[0271] In some embodiments, the angle between a first connecting line (e.g., dashed line M in Figure 3C) connecting the exhaust port 321 of the intake pipe 320 to the center (i.e., the center of the circle) of the gas passage 340 and a second connecting line (e.g., dashed line N in Figure 3C) connecting the cavity intake port 331 to the center (i.e., the center of the circle) of the gas passage 340, along the direction of extension of the gas passage 340, may be greater than 270°. The arc shape formed along the outer wall of the blower cavity 330 of the gas passage 340 may be understood to be greater than three-quarters of a circle. As shown in Figure 3C, the cavity intake port 331 may be close to the cavity exhaust port 333, and the remaining portion of the outer wall of the blower cavity 330 may be the gas passage 340, except for a small portion of the outer wall that is connected to the cavity exhaust port 333. The noise reduction device 300 shown in this embodiment has the longest gas passage 340 and, accordingly, has the best noise reduction effect.

[0272] In some embodiments, referring to Figure 3B, the intake pipe 320 may have a bent structure. When outside air enters from the intake pipe 320, the airflow within the intake pipe 320 must be redirected to allow it to flow into the gas passage 340. This effectively reduces wind noise caused by friction between the intake pipe 320 and the air. When the airflow changes direction, the sound waves of the airflow can cancel each other out to some extent, thereby removing some noise in that frequency band and reducing noise during airflow transmission.

[0273] In some embodiments, referring to Figure 3B, the bent structure may include an upward bend, where the intake port 322 of the intake pipe 320 is at a different height from the exhaust port 321, and the intake port 322 of the intake pipe 320 is lower than the exhaust port 321. In some embodiments, the bent structure may include a downward bend, where the intake port 322 of the intake pipe 320 is at a different height from the exhaust port 321, and the intake port 322 of the intake pipe 320 is higher than the exhaust port 321.

[0274] In some embodiments, the intake pipe 320 may have a bent structure that allows outside air to enter the intake pipe 320, and a portion of the intake port 322 may have a first airflow direction. When air passes through the bent structure, the airflow can be redirected. A portion of the exhaust port 321 may also have a second airflow direction. The first airflow direction of the intake port 322 may be different from the second airflow direction of the exhaust port 321. That is, the airflow may undergo one redirection in the direction of airflow within the intake pipe 320.

[0275] In some embodiments, referring to Figure 3B, the bent structure may include an upward bend such that the exhaust port 321 is higher than the intake port 322. In some embodiments, the bent structure of the intake pipe 320 may include a horizontal section and a vertical section. The intake port 322 may be located in the horizontal section, and the exhaust port 321 may be located in the vertical section. The first airflow direction may be horizontal, and the second airflow direction may be vertical. When gas enters through the intake port 322 of the intake pipe 320, it first passes through the horizontal section to form a first airflow direction, then redirects the airflow upward to the bent structure in the vertical section to form a second airflow direction, and finally the gas can flow through the exhaust port 321 into the gas passage 340.

[0276] In some embodiments, the bent structure may include one or more bends so that the airflow can make multiple turns within the intake pipe 320 after the outside air enters the intake pipe 320. Provided that conditions such as air resistance and atmospheric pressure are met, a better noise reduction effect can be achieved by providing a structure with multiple turning points. For example, the bent structure may include two bends. When the outside air enters the intake port 322 of the intake pipe 320, the airflow direction may be horizontal. After the first bend, the airflow direction becomes vertical, and after the second bend, the airflow direction becomes horizontal. Alternatively, for example, the bent structure may include three bends. When the outside air enters the intake port 322 of the intake pipe 320 in a horizontal direction, the gas turns vertically after the first bend, horizontally after the second bend, and vertically after the third bend.

[0277] Figure 3D is a schematic front view of the internal cavity structure of the intake pipe of a noise reduction device according to some other embodiments of the present disclosure. In some embodiments, referring to Figure 3D, the intake pipe 320 may be a circular pipe including a horizontal section and a vertical section. The intake port 322 may be provided at the starting end of the horizontal section, and its inner wall may be circular in front view. In some embodiments, the end of the intake port 322 may be provided perpendicular to the horizontal section of the intake pipe 320, i.e., provided on the vertical plane. The exhaust port 321 may be provided at the end of the vertical section, and its inner wall may be circular in plan view. In some embodiments, the end of the exhaust port 321 may be provided perpendicular to the vertical section of the intake pipe 320, i.e., provided on the horizontal plane.

[0278] In some embodiments, the overall height of the vertical portion of the intake pipe 320 (see H in Figure 3D) may be 2 to 2.8 times the diameter of the horizontal portion of the intake pipe 320 (see inner diameter Φ of the intake port 322 in Figure 3D). In some embodiments, the overall height of the vertical portion of the intake pipe 320 (see H in Figure 3D) is 2.2 to 2.6 times the diameter of the horizontal portion of the intake pipe 320 (see inner diameter Φ of the intake port 322 in Figure 3D). In some embodiments, the overall height of the vertical portion of the intake pipe 320 (see H in Figure 3D) is 2.4 times the diameter of the horizontal portion of the intake pipe 320 (see inner diameter Φ of the intake port 322 in Figure 3D).

[0279] In some embodiments, the intake pipe 320 may include multiple bends, and the overall height of the vertical portion of the intake pipe 320 may be the sum of the vertical heights of the multiple bends.

[0280] In some embodiments, the ratio of the overall height of the vertical portion of the intake pipe 320 to the diameter of the horizontal portion of the intake pipe 320 can be specifically adjusted according to requirements such as gas resistance and air pressure.

[0281] Figure 3E is a schematic 3D diagram of the structure of a porous sound-absorbing plate in a noise reduction device according to some other embodiments of the present disclosure. In some embodiments, a porous sound-absorbing plate 360 ​​and / or sound-absorbing cotton may be provided in the gas passage 340, and a plurality of sound-absorbing holes 364 may be provided in the thickness direction of the porous sound-absorbing plate 360.

[0282] In some embodiments, sound-absorbing cotton (not shown in these embodiments) may be placed in the gas passage 340. The sound-absorbing cotton may be attached to the inner walls (including the side walls, top surface, and bottom surface) of the noise reduction housing 310 and / or the outer walls of the blower cavity 330. When airflow flows through the gas passage 340, the sound-absorbing cotton provided on at least one surface around the gas passage 340 can absorb noise generated during the period in which the airflow flows through the gas passage 340.

[0283] In some embodiments, sound-absorbing cotton may be attached to the bottom surface of the noise reduction housing 310. The airflow in the intake pipe 320 can be vertical when it exits the exhaust port 321 by passing through the bent structure and raising the direction of airflow. The airflow can then be reflected after hitting the top wall of the gas passage 340 (i.e., the lower surface of the noise reduction top housing 311), directing the airflow downward onto the sound-absorbing cotton below, which is advantageous as the sound-absorbing cotton absorbs more sound waves and reduces noise from the airflow.

[0284] In some embodiments, the sound-absorbing cotton may be non-porous sound-absorbing cotton. The non-porous sound-absorbing cotton may be arranged to surround the gas passage 340. As the airflow passes through the gas passage 340, the non-porous sound-absorbing cotton can not only absorb some noise but also reflect sound waves. The reflected sound waves are then absorbed and attenuated again by non-porous sound-absorbing cotton in other directions, resulting in a better noise reduction effect.

[0285] In some embodiments, a porous sound-absorbing plate 360 ​​may be further arranged in the gas passage 340, and a plurality of sound-absorbing holes 364 are provided in the thickness direction of the porous sound-absorbing plate 360. When the airflow in the gas passage 340 flows through the porous sound-absorbing plate 360, at least some of the sound waves of the airflow enter the suction holes 364, thereby reducing the noise of the airflow.

[0286] In the porous sound-absorbing plate 360, sound-absorbing holes 364 of different diameters may have different noise reduction effects against airflow noise in different frequency bands. Sound-absorbing holes 364 with smaller diameters are suitable for removing high-frequency noise, while sound-absorbing holes 364 with larger diameters are suitable for removing low-frequency noise. Based on this, in some embodiments, the porous sound-absorbing plate 360 ​​may include multiple regions, and the diameters of the sound-absorbing holes 364 in each region may be set according to a predetermined rule. For example, sound-absorbing holes 364 of multiple diameters can remove airflow noise in different frequency band ranges, effectively ensuring the noise reduction effect of the noise reduction structure.

[0287] In some embodiments, referring to Figure 3E, multiple regions of the perforated sound-absorbing plate 360 ​​may include a perforated top plate 361, perforated side plates 362, and a perforated bottom plate 363. The perforated top plate 361, perforated side plates 362, and perforated bottom plate 363 may be connected to form a three-way sealed structure. Gas entering from the intake pipe 320 can form an airflow in the gas passage 340. As the airflow passes through the perforated sound-absorbing plate 360, the multiple sound-absorbing holes 364 can perform a sound-absorbing function, achieving the objective of noise reduction. In some embodiments, the diameter of the sound-absorbing holes 364 in the perforated top plate 361, perforated side plates 362, and perforated bottom plate 363 may be the same.

[0288] In some embodiments, the diameters of the sound-absorbing holes 364 in the perforated top plate 361, perforated side plates 362, and perforated bottom plate 363 may differ. In some embodiments, the diameter of the sound-absorbing holes 364 in the perforated side plate 362 may be larger than the diameter of the sound-absorbing holes 364 in the perforated top plate 361 and / or perforated side plates 362. In some embodiments, the diameter of the sound-absorbing holes 364 in the perforated top plate 361 may be smaller than the diameter of the sound-absorbing holes 364 in the perforated bottom plate 363.

[0289] In some embodiments, the perforated top plate 361, perforated side plate 362, or perforated bottom plate 363 may each be divided into multiple regions. In each region, the diameter of the sound-absorbing holes 364 may be set to a value corresponding to the frequency band in which noise is actually reduced.

[0290] In some embodiments, the multiple regions of the porous sound-absorbing plate 360 ​​may be multiple regions spatially divided vertically along the airflow direction within the porous sound-absorbing plate 360. Each region may include a porous top plate 361, a porous side plate 362, and a porous bottom plate 363.

[0291] Figure 3F is a schematic top view of the structure of a porous sound-absorbing plate in a noise reduction device according to some other embodiments of the present disclosure. In some embodiments, referring to Figure 3F, the porous sound-absorbing plate 360 ​​may include three regions: a first region 365, a second region 366, and a third region 367. The diameters of the sound-absorbing holes 364 in the first region 365, the second region 366, and the third region 367 may be set according to a predetermined rule. In some embodiments, the diameters of the sound-absorbing holes 364 in the first region 365, the second region 366, and the third region 367 may be the same.

[0292] In some embodiments, the diameters of the sound-absorbing holes 364 in the first region 365, the second region 366, and the third region 367 may be different. In some embodiments, the diameter of the sound-absorbing holes 364 in the second region 366 may be larger than the diameter of the sound-absorbing holes 364 in the first region 365 and / or the third region 367. In some embodiments, the diameter of the sound-absorbing holes 364 in the first region 365 may be larger than the diameter of the sound-absorbing holes 364 in the third region 367. In some embodiments, the porous sound-absorbing plate 360 ​​may further include three or more regions (e.g., four, five, six, etc.) and the diameters of the sound-absorbing holes 364 in each region may be different.

[0293] In some embodiments, the size of the hole diameter of the sound-absorbing holes 364 in each region may be set according to the noise frequency band of the airflow passing through the porous sound-absorbing plate 360.

[0294] In some embodiments, the porous sound-absorbing plate 360 ​​may further have sound-absorbing holes 364 of different diameters that are irregularly distributed without dividing the region.

[0295] In some embodiments, the thickness of the porous sound-absorbing plate 360 ​​may be 1.5 mm, and the diameter of the sound-absorbing holes 364 of the porous sound-absorbing plate may be less than or equal to the thickness of the porous sound-absorbing plate 360.

[0296] In some embodiments, the porous sound-absorbing plate 360 ​​may be provided with sound-absorbing holes 364 of different diameters. Sound-absorbing holes 364 of different diameters can absorb noise of different frequency bands while airflow is passing through them. In some embodiments, the sound-absorbing holes 364 of the porous sound-absorbing plate may have multiple diameters, such as 0.6 mm, 0.9 mm, 1.0 mm, 1.2 mm, and 1.5 mm.

[0297] In some embodiments, a porous sound-absorbing plate 360 ​​and sound-absorbing cotton may be provided in the gas passage 340. The sound-absorbing cotton and the porous sound-absorbing plate 360 ​​may be sequentially attached to the inner wall of the noise reduction housing 310. That is, the inner and outer walls of the sound-absorbing cotton are attached to the outer wall of the porous sound-absorbing plate 360 ​​and the inner wall of the noise reduction housing 310, respectively. When airflow is generated through the gas passage 340, the porous sound-absorbing plate 360 ​​can absorb some of the noise, and some of the noise can pass through the multiple sound-absorbing holes 364 of the porous sound-absorbing plate and be absorbed by the sound-absorbing cotton, thereby producing a better noise reduction effect.

[0298] In some embodiments, referring to Figure 3A, the cavity intake port 331 may be located near the side wall of the blower cavity, at the end of the gas passage 340, and near the top of the gas passage 340. The gas passage 340 and the interior of the blower cavity 330 may be in communication via the cavity intake port 331. The vertical position and height of the cavity intake port 331 may be such that it is close to the blower motor section in the blower cavity 330 so that airflow enters the blower cavity 330 through the cavity intake port 331. When airflow enters the blower cavity 330 through the cavity intake port 331, the airflow flows from top to bottom, dissipating heat from the blower motor section, maintaining the blower within an appropriate temperature range and enabling better operating performance. The airflow circulates from top to bottom and finally enters the blower through an intake port below the blower motor. A blower can pressurize the gas it takes in.

[0299] In some embodiments, multiple cavity intake ports 331 may be provided on the side walls of the blower cavity. For example, referring to Figure 3G, two cavity intake ports 331 may be provided. One cavity intake port 331 may be located at the beginning of the gas passage 340 and close to the top of the gas passage 340 in the height direction, while the other cavity intake port 331 may be located at the end of the gas passage 340 and close to the middle of the gas passage 340 in the height direction. In some embodiments, arranging flow rate collection modules on both sides of the cavity intake port 331 located at the beginning of the gas passage 340 helps to obtain a stable flow rate and improve the accuracy of flow rate measurement.

[0300] In some embodiments, referring to Figures 3B and 3C, the noise reduction device 300 may further include a water collection cavity 332, the blower cavity 330 may further include a cavity exhaust port 333, and the noise reduction housing 310 may be provided at the main outlet 313. The cavity exhaust port 333 may communicate with the main outlet 313 via the water collection cavity 332. The vertical position height of the main outlet 313 may be higher than that of the water collection cavity 332, so that the gas enters the water collection cavity 332 from the cavity exhaust port 333 and is then lifted up to the main outlet 313 and discharged. The main outlet 313 may communicate with a ventilation pipe (intake passage 521-1 described later) of a water tank or cover plate without a water tank located downstream of the gas passage of the noise reduction device 300 inside the respiratory ventilation equipment. The main outlet 313 is configured to transmit pressurized gas and ultimately communicate with an external user interface 7000. The gas pressurized by the blower is used to substitute for, control, or modify the autonomic respiratory movements of the human body.

[0301] In some embodiments, if the downstream gas passage of the noise reduction device 300 is a water tank, the main outlet 313 may be sealed and connected to the intake passage 630 of the water tank in Figure 6A by a sealed structure. For specific details of the water tank structure, please refer to the relevant information in Figures 6A to 6I and 7A to 7G below. The upper water tank housing 611 and the lower water tank housing 612 may be hollow inside, and together they may form a water tank cavity for containing liquid. The intake passage 630 and the exhaust passage 640 may both be provided in the upper water tank housing 611. When the respiratory ventilation device is placed horizontally upward (i.e., in its proper operating state), the intake passage 630 may be located above the water tank cavity. After the gas pressurized by the blower flows out of the cavity exhaust port 333, it can be lifted upward and enter the intake passage 630 of the water tank via the main outlet 313. The intake passage 630 for the water tank may be located at the top of the water tank cavity. In this way, the liquid in the water tank does not flow back into the main body.

[0302] The respiratory ventilation device may be installed in a fixed orientation (i.e., the water tank cavity may be installed at the bottom, and the inspiratory passage may be installed at the top of the water tank cavity), and if the device is not placed in the correct position during use (e.g., tilted 90°), it may affect the performance of the respiratory ventilation device. Adverse effects include inability to operate at full power, generation of abnormal noise, and damage to the blower due to backflow of liquid in the water tank. Accordingly, in some embodiments, the main unit may be fitted with a position and orientation detection device configured to detect whether the respiratory ventilation device is in the correct position and orientation, and if an incorrect position and orientation is detected, an alarm message is issued (e.g., an alarm lamp flashes or an audible alarm is emitted).

[0303] In some embodiments, the vertical position height of the cavity exhaust port 333 may be higher than the bottom surface of the water collection cavity 332. Specifically, there may be a certain height difference between the lowest vertical end of the cavity exhaust port 333 and the bottom surface of the water collection cavity 332, thereby forming a grooved cavity from the bottom surface of the water collection cavity 332 to the lower end of the cavity exhaust port 333. If water in the water tank flows back, the cavity of the water collection cavity 332 is used to temporarily store some of the water, preventing water from flowing into the blower cavity 330 and protecting the blower inside the blower cavity 330. In some embodiments, the main outlet 313 may be located in the noise reduction top housing 311, and the height of the main outlet 313 may be higher than the cavity exhaust port 333. The gas exiting from the cavity exhaust port 333 can be lifted within the water collection cavity 332 and then enter the other components of the respiratory ventilation equipment via the main outlet 313. As the gas is lifted (i.e., redirected) within the water collection cavity 332, it can be further noise-reduced. Therefore, the installation of the water collection cavity 332 not only prevents water from flowing back into the blower cavity 330 but also helps in noise reduction. The cross-sectional shape of the conduit for the main outlet 313 may be designed to be circular, elliptical, or flattened circular, for example, depending on the actual situation, and is not limited thereto.

[0304] In the noise reduction device for the respiratory ventilation equipment of the above embodiment, the gas passage may be provided so as to surround the outside of the blower cavity, and the annular gas passage can reduce noise caused by the airflow flowing inside it, as well as noise caused by the operation of the blower in the blower cavity. The bent structure of the intake pipe may be designed to redirect the airflow inside the intake pipe and direct it into the gas passage, thereby effectively reducing wind noise caused by friction between the intake pipe and the air, and as the airflow changes direction, the sound waves of the airflow cancel each other out to some extent, removing some noise in that frequency band and reducing airflow transmission noise. The exhaust port of the intake pipe may be vertically upward, and the airflow exiting the exhaust port may also be vertically upward, and the airflow can strike the top wall of the gas passage (i.e., the lower surface of the top housing). Subsequently, due to repulsion, the airflow can flow downward to the sound-absorbing cotton below, and the sound-absorbing cotton can absorb more noise. In this way, noise generated by the airflow can be reduced. In the gas passage of the noise reduction device, porous sound-absorbing plates and / or sound-absorbing cotton may be placed to further reduce noise. The position and height of the cavity intake may be set to be close to the motor section of the blower in the blower cavity, so that the airflow can flow from top to bottom to cool the blower, and the blower can be maintained within an appropriate temperature range and maintain better operating performance.

[0305] In some embodiments, the noise reduction device may be attached to the main body by a snap fit. For example, the housing of the noise reduction device may be provided with at least one buckle, and the main body may be provided with at least one corresponding slot. When the noise reduction device is installed inside the main body, the snap can be connected to the corresponding slot to quickly position and securely install the noise reduction device inside the main body.

[0306] Figure 4A is a schematic diagram of the structure of a porous sound-absorbing plate according to some embodiments of the present disclosure.

[0307] In some embodiments, the porous sound-absorbing plate may be a porous sound-absorbing plate 400. In some embodiments, the porous sound-absorbing plate 400 is a thin plate provided with a plurality of minute through-holes 411. In some embodiments, the through-holes 411 may be arranged in an array that penetrates the porous sound-absorbing plate 400 along the thickness direction of the porous sound-absorbing plate 400. For example, in the porous sound-absorbing plate 400 of Figure 4A, the through-holes 411 may be arranged in an array of 7 holes in each row, for a total of 16 rows.

[0308] Furthermore, this disclosure does not limit the arrangement of the through holes (for example, the row spacing, column spacing, and array shape of the through holes 411), and the arrangement can be adjusted as needed.

[0309] In some embodiments, the porous sound-absorbing plate 400 can serve as an airflow noise reduction structure. One end of the porous sound-absorbing plate 400 may be in contact with the airflow, allowing the airflow to enter a sound-absorbing material (e.g., sound-absorbing cotton) or other component (e.g., the noise reduction housing described above) through the through-holes, thereby reducing noise caused by mechanical vibrations of the gas by converting the mechanical energy of the airflow into thermal energy.

[0310] In some embodiments, the through holes 411 may include first-type and second-type through holes. In particular, the diameter of the first-type through holes may be smaller than the diameter of the second-type through holes. As shown in Figure 4A, the sizes of the even-numbered and odd-numbered through holes in the porous sound-absorbing plate 400 may be different. The even-numbered through holes 411 may be first-type through holes, and the odd-numbered through holes 411 may be second-type through holes.

[0311] In some embodiments, the size of the through-holes 411 may be determined according to the sound absorption requirements of the porous sound-absorbing plate. For example, the first type of through-hole may be 0.8 mm, and the second type of through-hole may be 1.2 mm. The first and second type of through-holes thus divided can absorb noise of different frequencies, enriching the sound absorption range of the porous sound-absorbing plate.

[0312] Figure 4B is a cross-sectional view of the porous sound-absorbing plate shown in Figure 4A, along axis AA.

[0313] As shown in Figure 4B, one end of the porous sound-absorbing plate 400 that is in contact with the airflow is designated as the first surface 413, and the other end that is in contact with the sound-absorbing material is designated as the second surface 412. The opening on the first surface 413 of the through-hole 411 is designated as the first opening 416, and the opening on the second surface 412 of the through-hole 411 is designated as the second opening 415. The surface within the porous sound-absorbing plate 400 of the through-hole 411 that connects the first opening 416 and the second opening 415 is designated as the through-hole side wall 414.

[0314] In some embodiments, the diameter of the first opening 416 may be smaller than the diameter of the second opening 415, and the side wall 414 of the through-hole forms a reflective slope toward the sound-absorbing material. When airflow enters the sound-absorbing material along the through-hole 411, a portion of the airflow can be reflected by the sound-absorbing material, and if the sizes of the first opening 416 and the second opening 415 are the same, the reflected portion of the airflow can flow directly out of the through-hole 411. Furthermore, in this disclosure, based on the reflective slope formed on the side wall 414 of the through-hole toward the sound-absorbing material, the reflected portion of the airflow can be reflected again by the side wall 414 of the through-hole and enter the sound-absorbing material again, thereby improving noise reduction efficiency.

[0315] In some embodiments, the side wall 414 of the through hole may have a predetermined shape in the thickness-direction cross-section of the porous sound-absorbing plate 400. The predetermined shape may include a straight line, a curve, or a combination thereof. The predetermined shape may be determined based on the diameter of the first opening 416 and the diameter of the second opening 415. For example, if the difference between the diameter of the first opening 416 and the diameter of the second opening 415 is relatively small, the predetermined shape may be a straight line to minimize the difficulty of processing, i.e., the side wall 414 of the through hole may communicate with the first opening 416 and the second opening 415 on a straight side. Alternatively, if the difference between the diameter of the first opening 416 and the diameter of the second opening 415 is large, the predetermined shape may be a curve to increase the reflectivity of the side wall 414 of the through hole.

[0316] In some embodiments, airflow can enter the sound-absorbing material through the first opening 416, and the sound absorption performance of the porous sound-absorbing plate 400 may be related to the diameter of the first opening 416. Sound absorption constant of the porous sound-absorbing plate 400

number

number

number

number

number

number

number

number

number

[0317]

number

number

number

number

number

[0318] Based on the above constraints, the resonant frequency of the porous sound-absorbing plate was determined by experiment.

number

number

number

[0319] In some embodiments, the diameter of the first opening 416 may generally be smaller than the thickness of the porous sound-absorbing plate 400. The thickness of the porous sound-absorbing plate 400 for noise reduction may generally be 1.5 mm, and the diameter of the first opening 416 may be in the range of 0.8 mm to 1.4 mm.

[0320] In some embodiments, the porous sound-absorbing plate 400 may be provided with a first porous sound-absorbing plate and a second porous sound-absorbing plate depending on the direction of airflow. The first porous sound-absorbing plate may be a part of a porous sound-absorbing plate provided along a first plane, and the second porous sound-absorbing plate may be a part of a porous sound-absorbing plate perpendicular (or substantially perpendicular) to the first plane. The first plane may be a parallel plane to the plane formed by the airflow. For example, in the space of Figure 4D, if the airflow moves in a horizontal plane, the first plane may be the xy plane and its parallel planes.

[0321] Considering that different hole diameters of through-holes in a porous sound-absorbing plate result in different noise reduction effects against airflow noise in different frequency bands, smaller hole diameters are suitable for removing high-frequency noise, while larger hole diameters are suitable for removing low-frequency noise. In some embodiments, the hole diameter of the through-holes in the first porous sound-absorbing plate may be smaller than that of the through-holes in the second porous sound-absorbing plate. The through-holes in the first porous sound-absorbing plate may be of type 1, and the through-holes in the second porous sound-absorbing plate may be of type 2. Based on this, by designing the hole diameters of the through-holes in the first porous sound-absorbing plate and the through-holes in the second porous sound-absorbing plate to be of different sizes, noise in different frequency band ranges can be removed, and the noise reduction effect of the noise reduction structure can be effectively ensured.

[0322] In some other embodiments, the porous sound-absorbing plate 400 may be a sealed backplate, and a semi-sealed cavity may be provided within the porous sound-absorbing plate 400 adjacent to the second surface 412. Multiple through holes 411 of the porous sound-absorbing plate 400 may communicate with the cavity. When airflow in the gas passage passes through the porous sound-absorbing plate 400, noise sound waves enter the cavity inside the porous sound-absorbing plate 400 from the through holes 411 and are removed, effectively enhancing the noise reduction effect of the porous sound-absorbing plate 400.

[0323] In some embodiments, if the airflow to be noise-reduced has a complex spatial structure, the airflow to be noise-reduced may be divided into parts, so that the airflow of each part flows in a first plane corresponding to the airflow passage of that stage.

[0324] In some embodiments, the porous sound-absorbing plate may further include a partition member installed on the first surface of the porous sound-absorbing plate. The partition member may include two opposing partition member surfaces, which come into contact with the airflow to perform actions such as guiding and diversion, thereby improving the noise reduction efficiency of the porous sound-absorbing plate.

[0325] In some embodiments, the porous sound-absorbing plate may include a dividing member. When airflow flows through the dividing member, the airflow flows simultaneously through the two partition surfaces of the dividing member. In some embodiments, the dividing member may generally be installed parallel (or nearly parallel) to the airflow direction, such that the airflow direction substantially coincides with the installation direction of the dividing member, allowing the airflow to flow simultaneously through the two surfaces of the dividing member. The dividing member can achieve the effect of airflow diversion as required by the installation requirements.

[0326] In some embodiments, the dividing member may include at least one first partition member provided on the first surface. The angle between the installation direction of the at least one first partition member and the airflow direction may be such that it satisfies a first threshold condition. The first threshold condition may reflect a parallel or nearly parallel angle threshold condition. For example, the first threshold condition may be ±10°, i.e., if the angle between the installation direction of the first partition member and the airflow direction is within the range of ±10°, then the installation direction of the first partition member and the airflow direction satisfy the first threshold condition, and it can be determined that the partition member and the airflow are substantially parallel.

[0327] In some embodiments, at least one first partition member may be provided at the inlet end of the airflow to regulate the airflow at the intake port.

[0328] According to the first partition member described above, when airflow flows through the first partition member, the airflow flows simultaneously through the two partition member surfaces of the first partition member, forming at least two gas passages and minimizing the cross-sectional area of ​​the airflow in the gas passages. For the actual application of the first partition member, please refer to Figure 4D and related explanations; a detailed explanation is omitted here.

[0329] In some embodiments, the porous sound-absorbing plate may include guide members. When airflow flows through the guide members, the airflow flows sequentially over the two partition member surfaces of the guide members. The partition member surface over which the airflow preferentially flows may be designated as the first surface of the partition member, and the surface opposite the first surface may be designated as the second surface. In some embodiments, the guide members can alter the trajectory of the airflow, thereby extending the airflow path, ensuring sufficient contact with the porous sound-absorbing plate, and improving the noise reduction efficiency of the porous sound-absorbing plate. For example, the installation direction of the guide members can form a clear intervening angle (e.g., perpendicular or relative perpendicular) with respect to the airflow direction, and when airflow flows through the guide members, it is redirected by the guide members based on the installation angle of the guide members. Alternatively, for example, the guide members may partition a gas passage where the airflow is located (e.g., the guide members are installed across the gas passage), dividing the gas passage into a plurality of sub-gas passages, so that the airflow flows sequentially through the sub-gas passages.

[0330] In some embodiments, the guide member may include a second partition member provided on the first surface. The angle between the installation direction and the airflow direction may satisfy a first threshold condition. One end of the second partition member faces the airflow inlet end.

[0331] According to the second partition member described above, when airflow flows through the second partition member, the airflow can flow along the surface of the first partition member of the second partition member, and when it reaches the end of the second partition member, it can change direction and flow along the surface of the second partition member of the second partition member. For the actual application of the second partition member, please refer to Figure 4E and related explanations, and the explanation will be omitted here.

[0332] In some embodiments, the guide member may further include a third group of partition members provided on the first surface. The angle between the installation direction of the third group of partition members and the airflow direction may be such that it satisfies a second threshold condition. The second threshold condition is an angular threshold condition indicating the existence of a perpendicular or obvious angle. For example, the second threshold condition may be [-150°, -30°]∪[30°, 150°], that is, the angle between the installation direction of each partition member in the second group of partition members and the airflow direction is within the above range. In this case, it can be determined that the installation direction of each partition member in the second group of partition members and the airflow direction satisfy the second threshold condition, and that the installation direction of each partition member in the second group of partition members and the airflow direction are substantially perpendicular or that an obvious angle exists.

[0333] In some embodiments, the third partition member group may include at least one high-position third partition member and at least one low-position third partition member. The high-position third partition members may be installed adjacent to the low-position third partition members, alternating in height. The height may be understood as the direction of extension in the porous sound-absorbing plate. For example, the height direction may be the Z-axis direction in Figures 4D to 4G. The alternating arrangement may be understood as the high-position porous sound-absorbing plate and the low-position porous sound-absorbing plate being continuously and alternately adjacent in a predetermined direction (e.g., the X-axis and Y-axis directions in Figures 4D to 4G).

[0334] According to the above-described group of third partition members, when airflow flows sequentially through adjacent high-position third partition members and low-position third partition members, the airflow can flow along the first surface of the high-position third partition member. Upon reaching the end of the high-position third partition member, the airflow can enter the airflow passage formed by the second surface of the high-position third partition member and the first surface of the low-position third partition member. At the end of the low-position third partition member, the airflow can flow out along the second surface of the third partition member. For the actual application of the third partition members, please refer to Figure 4F and related explanations; a detailed explanation is omitted here.

[0335] In some embodiments, the porous sound-absorbing plate always curves with the airflow during actual application. Considering that the first porous sound-absorbing plate generally functions as the upper and lower surfaces of the airflow, the second porous sound-absorbing plate in the porous sound-absorbing plate may be provided with a bend in the porous sound-absorbing plate along the airflow.

[0336] In some embodiments, to eliminate noise at the bend of the porous sound-absorbing plate, the second porous sound-absorbing plate may include a fourth group of partition members provided at the bend of the porous sound-absorbing plate. The angle between the installation direction of the fourth group of partition members and the airflow direction satisfies the second threshold condition. The fourth group of partition members can be considered a type of guide member.

[0337] In some embodiments, the fourth partition member group may include at least one first side partition member and at least one second side partition member, wherein the first side partition member is provided on one side of the bend of the porous sound-absorbing plate, and the second side partition member is provided on the other side of the bend of the porous sound-absorbing plate. The first side partition members may be installed alternately adjacent to the second side partition members in the installation direction of the second porous sound-absorbing plate. Adjacent first side partition members and second side partition members have alternating portions in the installation direction.

[0338] According to the fourth partition member group described above, when airflow flows through the adjacent first and second partition members, the airflow flows along the first surface of the first partition member, turns when it reaches the end of the first partition member, enters the airflow passage formed in the alternating section, and finally reaches the first surface of the second partition member and can flow out. For the actual application of the fourth partition member group, please refer to Figure 4G and related explanations, and the explanation will be omitted here.

[0339] In some embodiments, the second porous sound-absorbing plate may further include a fifth partition member installed in alternating sections. The angle between the installation direction of the fifth partition member and the airflow direction may be such that it satisfies a first threshold condition.

[0340] According to the fifth partition member described above, when the airflow flows through the alternating portion between the adjacent first and second partition members, the airflow flows simultaneously through the two partition member surfaces of the first partition member, forming at least two airflow channels to guide the airflow. For the actual application of the fifth partition member, please refer to Figure 4G and related explanations, and the explanation will be omitted here.

[0341] To further illustrate the application of porous sound-absorbing plates in actual settings, this disclosure further provides noise reduction structures relating to porous sound-absorbing plates. The noise reduction structure can be applied to a blower within the body of a respiratory ventilation device. The noise reduction structure may include a noise reduction housing, a porous sound-absorbing plate, and sound-absorbing material. The noise reduction housing may be configured to house the noise reduction structure and the blower. The porous sound-absorbing plate may be provided in a gas passage between the blower cavity and the housing of the noise reduction device, and the gas passage may be provided in the noise reduction device. The gas passage may be configured to guide outside air into the blower cavity. The sound-absorbing material may be provided between the porous sound-absorbing plate and the housing.

[0342] Figure 4C is a cross-sectional view of a noise reduction structure according to some embodiments of the present disclosure.

[0343] As shown in Figure 4C, embodiments of the present disclosure provide a noise reduction structure. The noise reduction structure 4100 may be applied to a blower assembly 4200. The noise reduction structure 4100 may include a noise reduction housing 4110, a porous sound-absorbing plate 4120, and sound-absorbing cotton 4130.

[0344] In embodiments of the present disclosure, the blower assembly 4200 may include a blower integrated into a respiratory ventilation device. The blower in the respiratory ventilation device may be a device configured to increase the pressure of a gas and transport the gas to assist the user's breathing. In some embodiments, the blower assembly 4200 may include a blower body 4210 and a blower cavity 4220. The blower body 4210 may be provided in the noise reduction structure 4100 via the blower cavity 4220, and the blower cavity 4220 may be configured to house and fix the blower body 4210.

[0345] The blower cavity 4220 may include a blower cavity housing 4221, a cavity intake port 4222, and a cavity exhaust port 4223. The blower cavity housing 4221 may be the main structure of the blower cavity 4220 configured to house the blower body 4210. The cavity intake port 4222 and the cavity exhaust port 4223 may be provided in the blower cavity housing 4221. The cavity intake port 4222 may communicate with a noise reduction structure 4100 to introduce outside air. The exhaust port 4223 may communicate with a gas passage inside the body and ultimately communicate with a user interface 7000 to deliver the pressurized airflow. During operation, outside air enters the cavity intake port 4222 via the noise reduction structure 4100 and blows the blower Main unit After being pressurized by 4210, it can be discharged from the cavity exhaust port 4223.

[0346] This disclosure does not limit the type of blower body 4210, and in the drawings of this disclosure, the blower body 4210 is described as a centrifugal blower as an example. When changing the type of blower body 4210, only the shape of the blower cavity 4220 needs to be adaptively adjusted, and this does not affect the noise reduction structure 4100. For example, the blower body 4210 in Figure 4C may be replaced with an axial flow blower. In this case, the orientation of the cavity exhaust port 4223 (e.g., upward) should be changed so that the cavity exhaust port 4223 is installed along the exhaust direction of the blower.

[0347] The blower cavity housing 4221 may be configured to restrict the entry and exit of outside air. In some embodiments, the blower cavity housing 4221 may be a spatial structure consisting of multiple parts (e.g., an upper housing, a lower housing, etc.). The shape of the structure is not limited and may be square, circular, or other irregular shapes.

[0348] In some embodiments, the cavity intake ports 4222 may be located on the side of the blower cavity housing 4221 facing the gas passage to allow outside air to enter the blower cavity. There may be one or more cavity intake ports 4222, and the number and location of the cavity intake ports 4222 are not limited in this disclosure.

[0349] In some embodiments, as shown in Figure 4C, the cavity intake ports 4222 may be uniformly distributed in the blower cavity housing 4221 along the gas passage, allowing the airflow to be dispersed as it flows through the gas passage into the blower cavity, reducing the airflow rate entering the intake ports and thus reducing the generated noise. The noise reduction housing 4110 may be a structure for housing the noise reduction structure and the blower. For example, the noise reduction structure 4100 and the blower assembly 4200 may be considered as a whole blower component by the noise reduction housing 4110 and may be integrated into a respiratory ventilation device. In some embodiments, the noise reduction housing 4110 may be a spatial structure consisting of multiple parts (e.g., upper housing, lower housing, etc.). The shape of the noise reduction housing 4110 is not limited and may be square, circular, or other irregular shapes. In some embodiments, the structural shape and size of the noise reduction housing 4110 may be determined based on the shape and size of the noise reduction structure 4100 and the blower assembly 4200.

[0350] In some embodiments, the noise reduction housing 4110 may be configured to house and secure the blower assembly 4200 and other components of the noise reduction structure 4100. For example, the porous sound-absorbing plate 4120 may be provided in the noise reduction housing 4110 by a fixed connection. Alternatively, for example, sound-absorbing cotton 4130 may be interposed between the porous sound-absorbing plate 4120 and the housing. A fixed connection means that a part or component is fixed so that no relative movement occurs. Fixed connections may include non-removable connections (e.g., welding, integral molding, etc.), removable connections (e.g., assembly based on screw connections, buckle connections, etc.) and direct connections (e.g., component is placed to corresponding dimensions based on predetermined dimensions and fixed and assembled by methods such as tightening, contact, etc.).

[0351] In some embodiments, the noise reduction housing 4110 may form a gas passage with the blower cavity. The gas passage is a passage through which gas from outside the noise reduction housing 4110 enters the noise reduction housing 4110 and flows through the inside of the noise reduction housing 4110 to the blower assembly 4200.

[0352] In some embodiments, the space between the noise reduction housing 4110 and the blower cavity housing 4221 may be represented as a gas passage. The starting end of the gas passage is the housing intake port 41 in the noise reduction housing 4110. 5 It may be 0, and the end of the gas passage may be a cavity intake port 4222 provided in the blower cavity housing 4221. The gas passage can extend the circuit when the airflow enters the blower assembly 4200 and reduce noise.

[0353] In some embodiments, the porous sound-absorbing plate 4120 may be provided in the gas passage between the blower cavity where the blower body 4210 is located and the noise reduction housing 4110. When the airflow in the gas passage passes through the porous sound-absorbing plate 4120, the noise of the airflow passing through the gas passage can be significantly reduced based on the sound-absorbing characteristics of the micropores.

[0354] In some embodiments, referring to Figure 4C, the porous sound-absorbing plate 4120 may include a first surface 4121, a second surface 4122, and through holes. The first surface 4121 refers to one surface of the porous sound-absorbing plate 4120 facing the gas passage, and the second surface 4122 refers to one surface of the porous sound-absorbing plate 4120 facing the sound-absorbing cotton or the respiratory ventilation equipment housing, i.e., the other surface of the porous sound-absorbing plate. Further details of the first surface, the second surface, and through holes are omitted here and should be referred to in the related explanation in Figure 4A.

[0355] In some embodiments of this disclosure, viscous dissipation occurs as airflow passes through a through-hole, removing some low-frequency noise in the airflow and reducing noise. Furthermore, the airflow noise reduction effect may differ for different frequency band ranges based on different hole diameters, and noise in different frequency bands can be reduced by designing the hole diameters on the first surface and the second surface of the through-hole to be different. Thus, noise in different frequency bands can be reduced, better noise removal can be achieved, and a better user experience can be ensured.

[0356] In some embodiments, considering the airflow direction in the gas passage, the porous sound-absorbing plate 4120 may be further divided into a first porous sound-absorbing plate 4120-1 (not shown in Figure 4C, see Figures 4D to 4G), a second porous sound-absorbing plate 4120-2, and a third porous sound-absorbing plate 4120-3. The first porous sound-absorbing plate 4120-1 and the third porous sound-absorbing plate 4120-3 may be porous sound-absorbing plates substantially parallel to the first plane. The second porous sound-absorbing plate 4120 may be a porous sound-absorbing plate substantially perpendicular to the first plane. The first plane may be the xy plane. In some embodiments, the first porous sound-absorbing plate 4120-1 may be represented as the top surface of the porous sound-absorbing plate so as to be in contact with the top surface of the gas passage, and 3 Porous sound-absorbing plate 4120- 3 The porous sound-absorbing plate 4120 is placed in contact with the bottom surface of the gas passage. bottom It may be represented as a surface.2 Porous sound-absorbing plate 4120- 2 This may be represented as a side view of the porous sound-absorbing plate 4120.

[0357] In some embodiments, the first porous sound-absorbing plate 4120-1 or the second porous sound-absorbing plate 4120-2 may be flat or curved. For example, in Figure 4D, the second porous sound-absorbing plate 4120-2 may be L-shaped. As an alternative embodiment, the second porous sound-absorbing plate may be arc-shaped.

[0358] In some embodiments, referring to Figure 4C, of ​​the gas passages formed between the inner wall of the noise reduction housing and the outer wall of the blower cavity, generally only the gas passage formed between the porous sound-absorbing plate 4120 and the outer wall of the blower cavity is an effective gas passage, and noise can generally be reduced by filling the other parts with impedance sound-insulating material (e.g., sound-absorbing cotton). The form of the porous sound-absorbing plate 4120 can be determined according to the design of the gas passage, that is, the shape of the first porous sound-absorbing plate 4120-1 or the second porous sound-absorbing plate 4120-2 may be installed along the extension direction of the gas passage in accordance with the shape of the gas passage. For example, if the gas passage is designed as a straight gas passage, the porous sound-absorbing plate 4120 may be represented as a square gas passage. The second porous sound-absorbing plate 4120-2 may be a side wall of the passage, and the first porous sound-absorbing plate 4120-1 may be the top or bottom surface of the passage. Furthermore, for example, the first porous sound-absorbing plate 4120-1 and the second porous sound-absorbing plate 4120-2 may be provided only at certain locations in the gas passage and without any bends in order to reduce the difficulty of processing.

[0359] This disclosure does not limit the shape or processing method of the first porous sound-absorbing plate or the second porous sound-absorbing plate. The first porous sound-absorbing plate or the second porous sound-absorbing plate may be flat or curved. The first porous sound-absorbing plate and the second porous sound-absorbing plate may be integrally molded or separately molded and combined.

[0360] The sound-absorbing cotton may also have a structure for absorbing airflow noise. In some embodiments, the sound-absorbing cotton may be provided between the porous sound-absorbing plate 4120 and the inner wall of the noise reduction housing, and by working together with the porous sound-absorbing plate 4120 to absorb noise, a double level of noise reduction can be achieved. Note that the sound-absorbing cotton is merely one example of a general sound-absorbing material, and may be replaced with other sound-absorbing materials in practical use.

[0361] This disclosure does not limit the structural shape of the sound-absorbing cotton. The sound-absorbing cotton may have a regular shape (e.g., a rectangle) or an irregular shape (e.g., a curve). In some embodiments, the structural shape of the sound-absorbing cotton may be determined based on the gap between the porous sound-absorbing plate 400 and the inner wall of the noise reduction housing.

[0362] In some embodiments, the sound-absorbing cotton may be a single-piece molded structure, a structure composed of multiple segmented structures, or it may be determined based on the actual situation.

[0363] In some embodiments, as shown in Figures 4A to 4B, when gas flows through the gas passage, some of the gas can pass through the through-holes 411 in the porous sound-absorbing plate 400 and reach the sound-absorbing cotton. The airflow in this portion can be viscously dissipated as it passes through the through-holes 411, removing some of the high-frequency noise in the airflow. As a result, some of the noise from the airflow that reaches the sound-absorbing cotton is absorbed by the cotton, some is reflected, and passes through the through-holes 411 of the porous sound-absorbing plate 400 again (removing some of the noise again through viscous dissipation), and re-enters the gas passage. The remaining high-frequency noise in the airflow returning to the gas passage can be canceled out by high-frequency superposition with other airflow in the gas passage. This process is repeated. In addition, a certain gradient may exist on the side wall of the through-hole 411, based on the fact that the hole diameter on the first surface 413 of the through-hole 411 is smaller than the hole diameter on the second surface 412 of the through-hole 411. Therefore, noise returning from the sound-absorbing cotton is reflected by the through-hole side wall 414, reducing the noise that is reflected back into the gas passage.

[0364] Figure 4D is a schematic diagram of the structure of the first partition member of a porous sound-absorbing plate according to some embodiments of the present disclosure.

[0365] As shown in Figure 4D, in some embodiments, the porous sound-absorbing plate 4120 may further include at least one first partition member 4124 provided at the air intake of the housing. The first partition member 4124 may be installed in the direction of airflow within the gas passage (indicated by the dashed arrow).

[0366] The first partition member is a structure provided at the intake port of the gas passage and for partitioning the airflow within the gas passage. The structural shape of the first partition member is not limited and may be a rectangular plate, a curved plate, or the like. In some embodiments, the structural shape of the first partition member 4124 may be adaptively designed based on the gap shape between the porous sound-absorbing plate 4120 and the outer wall of the blower cavity. For example, the first partition member 4124 may be in contact with the outer wall of the blower cavity.

[0367] In some embodiments, the number of first partition members 4124 may not be limited. There may be only one first partition member 4124, or there may be multiple first partition members 4124. The specific number may be determined based on experiments, simulations, etc. In some embodiments, the first partition members 4124 may be fixedly attached to the porous sound-absorbing plate 4120 (for example, a second porous sound-absorbing plate on the side of the gas passage). For example, the first partition member 4124 may be attached to the porous sound-absorbing plate 4120 by a non-removable connection (for example, a hot-melt connection), or for example, the first partition member 4124 may be attached to the porous sound-absorbing plate 4120 by a removable connection (for example, a buckle connection), and the number of first partition members can be adjusted according to the actual needs.

[0368] In some embodiments of this disclosure, a plurality of first partition members are provided at the air intake of the porous sound-absorbing plate 4120, and the plurality of first partition members are distributed at intervals along a direction perpendicular to the airflow direction in the gas passage, thereby dividing the airflow flowing through the first partition members into at least two sub-airflows, reducing the cross-sectional area of ​​each sub-airflow and achieving streamlining of the airflow. By forcibly separating turbulence into laminar flow, it is possible to avoid the occurrence of turbulence phenomena while also avoiding noise caused by turbulence phenomena.

[0369] Figure 4E is a schematic diagram of the structure of the second partition member of a porous sound-absorbing plate according to some embodiments of the present disclosure.

[0370] In some embodiments, the porous sound-absorbing plate 4120 may further include a second partition member 4125. The second partition member 4125 may be provided inside the gas passage along the airflow direction. The partition member surface indicated by reference numeral 4125 in Figure 4E may be the second surface of the second partition member 4125. The opposing surface of the second surface may be the first surface of the second partition member 4125.

[0371] The airflow direction within the gas passage refers to the direction in which the airflow within the gas passage is located at the current position of the partition member, based on the structure of the existing porous sound-absorbing plate (and partition member). In this disclosure, the airflow direction within the gas passage during the subsequent installation process of partition members is consistent with this definition and is related to the installation position of each partition member.

[0372] In some embodiments, the second partition member 4125 may be in contact with the outer wall of the blower cavity and installed along the direction of the second porous sound-absorbing plate 4120-2, and the end of the second partition member 4125 may be installed at a distance from the end of the gas passage. Based on the second partition member 4125, the gas passage can be partitioned into a first sub-gas passage and a second sub-gas passage at the position of the second partition member 4125.

[0373] The first sub-gas passage and the second sub-gas passage may be two sub-gas passages in which the effective portion of the gas passage is divided by the second partition member 4125. The first sub-gas passage and the second sub-gas passage may be connected at the end of the second partition member 4125.

[0374] In some embodiments, as shown in Figure 4E, the first sub-gas passage may be located below the second partition member 4125, and the second sub-gas passage may be located above the second partition member 4125, and the intake port 41 of the gas passage 5 0 may be connected to the first sub-gas passage. Based on the first and second sub-gas passages, when the external airflow enters the gas passage, the direction of the airflow within the gas passage flows with reference to the wind direction of the arrows in Figure 4E. The outside air enters the first sub-gas passage along the intake port of the gas passage, enters the second sub-gas passage at the end of the second partition member 4125, and then enters the blower cavity through the cavity intake port 4222 of the blower cavity.

[0375] In some embodiments, the cavity intake ports of the blower cavity (e.g., the first intake port 231, the second intake port 232, and the third intake port 233 in Figure 2C) can be adjusted correspondingly based on the second sub-gas passage. For example, the cavity intake ports of the blower cavity may be located in the second sub-gas passage.

[0376] The first and second sub-gas passages formed by the second partition member 4125 further extend the length of the path through which the external airflow enters the blower, improve the noise reduction efficiency of each through-hole, and further reduce the noise of the blower. In addition, the cross-section of the gas passage separated by the second partition member 4125 can be made smaller than the cross-section of the original gas passage, thus avoiding the generation of turbulence and turbulent noise in the large-section gas passage.

[0377] Furthermore, based on the technical effects of the second partition member 4125, the second partition member 4125 may include a plurality of partition members installed in parallel (or substantially parallel) directions, and each partition member is installed alternately to further extend the length of the path through which the external airflow enters the blower.

[0378] Figure 4F is a schematic diagram of the structure of the third partition member of a porous sound-absorbing plate according to some embodiments of the present disclosure.

[0379] In some embodiments, the porous sound-absorbing plate 4120 may further include at least two third partition members, each of which may be positioned perpendicular to the airflow direction within the gas passage. The partition members may alternately contact the upper surface 41211 or the lower surface 41212 of the gas passage, such that at least one of the at least two third partition members contacts the upper surface 41211 of the gas passage and at least one of the third partition members contacts the lower surface 41212 of the gas passage.

[0380] As shown in Figure 4F, at least two third partition members form a third partition member group 4126, which may further include a first low-position third partition member 41261, a first high-position third partition member 41262, a second low-position third partition member 41263, and a second high-position third partition member 41264. The first low-position third partition member 41261 and the second low-position third partition member 41263 may be in contact with the lower surface 41212 of the gas passage. The first high-position third partition member 41262 and the second high-position third partition member 41264 may be in contact with the upper surface 41211 of the gas passage. In some embodiments, the first surface of the third partition member may be a surface facing the positive X-axis direction / negative Y-axis direction of each third partition member, and the second surface of the third partition member may be a surface facing the negative X-axis direction / positive Y-axis direction of each third partition member.

[0381] The third partition member is a structure that alternately contacts the upper or lower surface of the gas passage and partitions the airflow within the gas passage. As shown in Figure 4F, the upper surface 41211 of the gas passage is the first surface located above the gas passage, that is, the upper inner surface of the first surface (for example, the top surface) First porous sound-absorbing plate 4120-1 refers to the inner wall of the gas passage, and the lower surface 41212 of the gas passage is the first surface located below the gas passage, i.e., the lower inner surface of the first surface (for example, the bottom surface) 3 This refers to the inner wall of the porous sound-absorbing plate 4120-3. In some embodiments, the structural shape of the third partition member group 4126 is not limited and may be a rectangular plate, a curved plate, or the like.

[0382] In some embodiments, the phrase "the third partition members alternately contact the upper or lower surface of the gas passage" may be understood as meaning that the group of third partition members 4126 may be alternately connected in sequence to the upper surface 41211 and the lower surface 41212 of the gas passage. Exemplary, if three third partition members (denoted A31, A32, and A33, respectively) are installed in sequence perpendicular to the airflow direction in the gas passage, the first third partition member (A31) may be connected to the upper surface 1211 of the gas passage, the second third partition member (A32) may be connected to the lower surface 41212 of the gas passage, and the third third partition member (A33) may be connected to the upper surface 41211 of the gas passage. Alternatively, the first third partition member (A31) may be connected to the lower surface 41212 of the gas passage, the second third partition member (A32) may be connected to the upper surface 41211 of the gas passage, and the third third partition member (A33) may be connected to the lower surface 41212 of the gas passage.

[0383] In some embodiments, the third partition member group 4126 and the porous sound-absorbing plate 4120 may be integrally molded or fixedly connected. Furthermore, for example, the third partition member group 4126 may be further connected to the porous sound-absorbing plate 4120 by fastener connections, buckle connections, or the like.

[0384] In some embodiments, the dimensions of each third partition member of the third partition member group 4126 and / or the distance between the third partition members of the third partition member group 4126 may be matched with the dimensions of the gas passage, so that the cross-section of each third partition member of the airflow passage in the gas passage can be made substantially the same.

[0385] In some embodiments, the statement that "the dimensions of each third partition member in the third partition member group and / or the distance between third partition members in the third partition member group match the dimensions of the gas passage" may be understood as the height H, width L, and spacing D of each third partition member in the third partition member group 4126 matching the performance requirements of the gas passage. For example, the performance requirements of the gas passage may be that the airflow inside the gas passage is continuous and stable, and in order to meet these design requirements, the height H of the third partition members may be the same, the width L of the third partition members may be the same as the width W of the gas passage, and the spacing D between multiple third partition members may be the same. Therefore, when the airflow in the gas passage (indicated by dashed arrows) passes through each third partition member, the cross-section of the airflow passage at each third partition member may be approximately the same, that is, the volume of airflow flowing into the region formed by each pair of third partition members and the volume of airflow flowing out of the region may be approximately the same.

[0386] In some embodiments, the spacing D between the third partition members may vary, and the specific distance D is determined based on the current airflow volume. For example, if the distance between the second porous sound-absorbing plate 4120-2 and the outer wall of the blower cavity is large (i.e., the width W of this gas passage is large), the spacing D of the third partition members may be small, and if the distance between the second porous sound-absorbing plate 4120-2 and the outer wall of the blower cavity is small (i.e., the width W of this gas passage is small), the spacing D of the third partition members may be large. This makes it possible to make the volume of airflow at each position approximately the same.

[0387] The height of the third partition member is not limited and may be determined based on experiments, simulations, etc. In some embodiments, the height of the third partition member may be determined based on the cross-section of the cavity intake of the blower cavity. Exemplarily, the height of the third partition member may be the ratio of the cross-sectional area of ​​the cavity intake of the blower cavity to the width of the third partition member (i.e., the width of the gas passage).

[0388] In some embodiments of this disclosure, by alternately installing third partition members in the airflow direction perpendicular to the gas passage, the airflow within the gas passage can pass above and below (or below and above) the third partition members in sequence, thereby extending the airflow path. Furthermore, based on the matching of the dimensions of the third partition members and / or the distance between them with the dimensions of the gas passage, the cross-section of the airflow path in the gas passage at the third partition members can be made substantially the same, maximizing the use of the through-holes in the porous sound-absorbing plate and achieving a better noise reduction effect.

[0389] Figure 4G is a schematic diagram of the structure of the fourth and fifth partition members of a porous sound-absorbing plate according to some embodiments of the present disclosure.

[0390] As shown in Figure 4G, in some embodiments, the porous sound-absorbing plate 4120 may further include at least two fourth partition members installed at the corners of the gas passage. The at least two fourth partition members form a fourth partition member group 4127, which may specifically include a first side partition member 41271 and a second side partition member 41272. In Figure 4G, the surface pointed to by reference numeral 41271 may be the first surface of the first side partition member 41271, and the opposite side of the surface pointed to by reference numeral 41271 may be the second surface of the first side partition member 41271. In Figure 4G, reference numeral 4127 2 The surface being referred to is the second side partition member 41272 1 It may be a surface, and the opposite side of the surface indicated by reference numeral 41272 may be the second surface of the second partition member 41272.

[0391] A fourth partition member is a structure provided at the corner of a gas passage to partition the airflow. In some embodiments, the fourth partition members may be alternately installed on both sides of the corner along a direction perpendicular to the direction of airflow in the gas passage, so that the airflow in the gas passage (indicated by dashed arrows) flows from above one of the fourth partition members of the fourth partition member group 4127 (for example, the first side partition member 41271) to below the other of the fourth partition members of the fourth partition member group 4127 (for example, the second side partition member 41272). Two adjacent fourth partition members may form a corner and have overlapping portions. In other words, the airflow first flows over the first surface of the first partition member 41271, then changes direction above the first partition member 41271 and enters the alternating section, flows over the second surface of the second partition member 41272, and flows out below the second partition member 41272.

[0392] In some embodiments, "alternatingly installed on both sides of the corner" may be understood as the fourth group of partition members 4127 being sequentially and alternately connected to the porous sound-absorbing plates on both sides of the corner. For example, the first side of the second porous sound-absorbing plate 4120-2 Bup Rate 41221 and 2nd S Bup Regarding rate 41222, the first Bup Rate 41221 and the 2nd Bup A corner may be formed by the rate 41222. The first side partition member 41271 of the fourth partition member group 4127 may be connected to the first subplate 41221, and the second side partition member 41272 may be connected to the second subplate 41222. "Alternating vertically" may be understood as there being a difference in height between each of the fourth partition members of the fourth partition member group 4127. For example, 2 The side partition member 41272 is the 1 It may be provided above the side partition member 41271.

[0393] In some embodiments, the porous sound-absorbing plate 4120 may be simultaneously coupled to each fourth partition member and further include a support plate 4129 for supporting the fourth partition member. As shown in Figure 4G, the opposing sides of the sides of the fourth partition member that are connected to the porous sound-absorbing plate may be connected to the support plate 4129.

[0394] The area above the fourth partition member refers to the area above the lower of at least two fourth partition members. As shown in Figure 4G, the area above the fourth partition member may be above the first side partition member 41271, that is, the area between the first side partition member 41271 and the first porous sound-absorbing plate 4120-1.

[0395] The area below the fourth partition member is the area below the upper of at least two fourth partition members. As shown in Figure 4G, the area below the fourth partition member is below the second side partition member 41272, that is, the area between the second side partition member 41272 and the 3 It may also be located between the porous sound-absorbing plate 4120-3.

[0396] In some embodiments, the phrase "an angle is formed by two adjacent fourth partition members" may be understood as the angle formed when two adjacent fourth partition members from the fourth partition member group 4127 (i.e., the first side partition member 41271 and the second side partition member 41272 in Figure 4G) are installed alternately vertically at a corner. In some embodiments, the angle may be determined based on historical data, simulations, etc. For example, the angle may be 90°.

[0397] In some embodiments, the “overlapping portion” may be understood as the overlapping portion of the projection in the alternating installation direction when two adjacent fourth partition members of the fourth partition member group 4127 (i.e., the first side partition member 41271 and the second side partition member 41272 in Figure 4G) are installed alternately vertically. That is, the height difference between the fourth partition members may be less than the length of the fourth partition member itself. This overlapping portion may be designed to change the direction of the airflow by guiding it to enter below one of the fourth partition members of the fourth partition member group 4127 (e.g., the first side partition member 41271) as it passes above the other fourth partition member (e.g., the second side partition member 41272).

[0398] In some embodiments of this disclosure, by providing at least two fourth partition members at a corner and arranging them alternately on each side of the corner along a direction perpendicular to the airflow direction in the gas passage, the airflow in the gas passage can change direction by passing over one of the at least two fourth partition members and below the other of the at least two fourth partition members. In this way, the length of the gas passage is increased to some extent, and the noise reduction effect can be improved by allowing the airflow to pass through the through-holes of the porous sound-absorbing plate as much as possible.

[0399] As shown in Figure 4G, in some embodiments, the porous sound-absorbing plate 4120 may further include a fifth partition member 4128.

[0400] A fifth partition member is a structure provided between at least two fourth partition members along the airflow direction in the gas passage. In some embodiments, the fifth partition member 4128 may be provided between each of the fourth partition members of the fourth partition member group 4127 and along the airflow direction in the gas passage. The length of the fifth partition member 4128 along the airflow direction may be the same as the length of the overlapping portion between two adjacent fourth partition members. That is, in the overlapping portion between two fourth partition members, one end of the fifth partition member 4128 is adjacent to one fourth partition member (for example, the fourth 1 sideIt is connected to partition member 41271), and the other end is connected to the first fourth partition member (for example, the first) of the overlapping portion. Side 2 The fifth partition member is connected to partition member 41272) and may be provided along the direction of airflow within the gas passage.

[0401] In this context, "direction of airflow within the gas passage" may be understood as the direction of airflow after the original direction of airflow has been changed by the guiding action of two adjacent fourth partition members (i.e., the first partition member 41271 and the second partition member 41272 in Figure 4G) of the fourth partition member group 4127. As shown in Figure 4G, the direction of airflow within the gas passage (indicated by the dashed arrow) changes from the original horizontal to a vertically downward direction to the left when passing through the two adjacent fourth partition members. Here, "direction of airflow within the gas passage" may also refer to a vertically downward airflow direction.

[0402] In some embodiments of this disclosure, by providing a fifth partition member between at least two fourth partition members and along the airflow direction within the gas passage, the airflow can be partitioned when it flows in from above one of the at least two fourth partition members, thereby preventing turbulence from occurring in the corners of the airflow, ensuring the gas in the gas passage is contained, and creating a foundation for the airflow to enter the through-holes of the porous sound-absorbing plate to the maximum extent. Furthermore, adjacent fourth partition members and the fifth partition member between them can form a large-section-small-section-large-section noise reduction structure that reduces noise based on the resistance principle.

[0403] In some embodiments, as shown in Figure 4H, the noise reduction structure 4100 may further include a noise reduction top housing 4140. To more clearly observe the arrangement of the porous sound-absorbing plate 4120 and sound-absorbing cotton 4130 inside the noise reduction housing, the noise reduction bottom housing is not shown in Figure 4H (in this embodiment, the noise reduction structure 4100 consists of a noise reduction bottom housing and a noise reduction top housing 4140 that are cooperatively connected). As shown in Figure 4H, the sound-absorbing cotton 4130 is located in the noise reduction top housing 4140. Blower unit 4210 It may be provided on the side facing the noise, and the sound-absorbing cotton 4130 is a noise-reducing bottom housing Blower unit 4210 It may be provided on the side facing the light. This is because the sound-absorbing cotton 4130 is Blower unit 4210 It may be understood that it is provided on both the upper and lower sides. Also, the sound-absorbing cotton 413 is Blower unit 4210 It may be provided on the side corresponding to the blower, and may be made to partially seal the side of the blower. For example, sound-absorbing cotton 4130 is Blower unit 4210 The sound-absorbing cotton 4130 may be provided circumferentially along the direction of the air intake, and specifically, the sound-absorbing cotton 4130 may be provided circumferentially in the form of a circle, a semicircle, or a part of a circle, for example. The sound-absorbing cotton 4130 corresponding to the bottom, top, and circumference of the blower can absorb noise within the noise reduction device over a large spatial range. For example, noise caused by airflow in the gas passage and Blower unit 4210 It can absorb vibration noise caused by the operation of the device.

[0404] In some embodiments, Blower unit 4210 Multiple blower support columns 4211 may be provided at the lower end, and the sound-absorbing cotton 4130 configured above the noise reduction bottom housing may be provided with through holes of a number and size corresponding to the multiple blower support columns 4211. Blower unit 4210 When the blower support columns 4211 are installed inside the noise reduction housing, the lower ends of the multiple blower support columns 4211 pass through the through-holes in the sound-absorbing cotton 4130 and are in contact with or fixedly connected to the upper end surface of the noise reduction bottom housing. With this structural design, the sound-absorbing cotton 4130 Blower unit 4210 It can better absorb vibration noise caused by the operation of the device.

[0405] In some embodiments, as shown in Figure 4H, the porous sound-absorbing plate 4120 arranged along the extension direction of the gas passage may be less than half the height of the gas passage. At the upper end of the porous sound-absorbing plate 4120, Top housing support column 4123 This may be configured. Top housing support column 4123 The lower end may be fixedly connected to the upper end of the porous sound-absorbing plate 4120. Top housing support column 4123 The upper end may be fixedly connected to the noise reduction top housing 4140. Blower unit 4210To facilitate installation, subsequent removal, and maintenance, Top housing support column 4123 At least one end may be detachably fixed to the porous sound-absorbing plate 4120 or the noise reduction top housing 4140 (for example, a snap, pin, screw, etc. may be used). In some embodiments, multiple Top housing support column 4123 The lower end may be integrally molded with the porous sound-absorbing plate 4120, or it may be fixedly connected to the porous sound-absorbing plate 4120 by an immovable method such as adhesive or riveting. Top housing support column 4123 The upper end may be fixedly connected to the noise reduction top housing 4140 by a removable connection method such as a snap, pin, or screw. In some embodiments, multiple Top housing support column 4123 The upper end may be permanently fixed to the noise reduction top housing 4140, and the lower end may be permanently fixed to the porous sound-absorbing plate 4120. In some embodiments, multiple Top housing support column 4123 Both the upper and lower ends may be detachably connected to the porous sound-absorbing plate 4120.

[0406] A respiratory ventilation device may include a main unit and a water tank or a cover plate without a water tank connected to the main unit. In actual use, to ensure that the user uses the respiratory ventilation device for an extended period (e.g., 10 hours) and to reduce irritation to the airway mucosa by cold, dry gas, many respiratory ventilation devices are equipped with a water tank. By heating the liquid in the water tank, water vapor is generated, warming and humidifying the gas inhaled into the user's body. A cover plate without a water tank can be used when the user uses the device for a short period (e.g., 2 hours) or when heating and humidifying the gas is not required. The main unit and water tank of a separate respiratory ventilation device are detachable and assembleable, making them easier to transport, and making cleaning the water tank and adding liquid easier. In the following embodiments, a sealing structure is proposed for use in the sealed connection between the main unit and the connecting device (including the water tank and the cover plate without a water tank) to allow for a more secure connection between the water tank and the main unit and to have relatively high sealing performance.

[0407] Figure 5A is a schematic diagram of the structure of the main body of a respiratory ventilation device according to some embodiments of the present disclosure when it is not connected to a connecting device. Figure 5B is a schematic diagram of the structure of the main body of a respiratory ventilation device according to some embodiments of the present disclosure when it is connected to a connecting device via a sealed structure. Figure 5C is a schematic diagram of the structure of the first elastic tube according to some embodiments of the present disclosure. Figure 5D is a schematic diagram of the first elastic tube shown in Figure 5C from a different angle. Figure 5E is a schematic cross-sectional view of the first elastic tube shown in Figure 5C.

[0408] In some embodiments, as shown with reference to Figures 5A to 5C, the respiratory ventilation device 500 may include a main body 510, a connecting device 520, and a sealing structure 530. The main body 510 may be configured to generate a high-pressure gas higher than atmospheric pressure. The connecting device 520 may include a ventilation tube 521 that receives the high-pressure gas. The sealing structure 530 may be configured to seal the main body 510 and the connecting device 520, and in some embodiments, both ends of the sealing structure 530 may be detachably connected to the main body 510 and the connecting device 520, respectively. In some embodiments, one end of the sealing structure 530 may be fixedly connected to the correspondingly connected main body 510 and connecting device 520, and the other end may be detachably connected to the corresponding connecting device 520 and main body 510. The sealing structure 530 may include an elastic tube 531 (e.g., a first elastic tube 5311 and / or a second elastic tube 5312 in Figure 5B). The main body 510 and the connecting device 520 connected to the elastic tube 531 may be provided with annular projections 532. The annular projections 532 may be configured to be used for a sealed connection between the elastic tube 531 and the main body 510 or the connecting device 520. When the elastic tube 531 is connected to the ventilation tube 521, the high-pressure gas generated on the main body 510 side can enter the ventilation tube 521 through the elastic tube 531. In some embodiments, when the ventilation tube 521 and the elastic tube 531 are connected, the annular projections 532 can be pressed to generate a large frictional resistance between the ventilation tube 521 and the elastic tube 531. This frictional resistance limits the separation of the ventilation tube 521 and the elastic tube 531 and serves to seal the connection between the elastic tube 531 and the ventilation tube 521.

[0409] In some embodiments, when the elastic tube 531 is connected to the corresponding end of the main body 510, the end of the elastic tube 531 may be inserted into the corresponding end of the main body 510, or the corresponding end of the main body 510 may be inserted into the corresponding end of the elastic tube 531. Similarly, when the elastic tube 531 is connected to the connecting device 520, the fitting method between the ventilation tube 521 and the elastic tube 531 may include extending the ventilation tube 521 into the elastic tube 531, or extending the elastic tube 531 into the ventilation tube 521. As just one example, taking the case of extending the ventilation tube 521 into the elastic tube 531, the annular projection 532 may be provided on the inner wall of the elastic tube 531 or on the outer wall of the ventilation tube 521. In the process of extending the ventilation tube 521 into the elastic tube 531, the annular projection 532 can deform under pressure from the inner wall of the elastic tube 531 and the outer wall of the ventilation tube 521, generating a large frictional resistance. The frictional resistance prevents the ventilation pipe 521 from detaching from the elastic pipe 531, ensuring that the ventilation pipe 521 is firmly fixed inside the elastic pipe 531. Furthermore, since the annular projection 532 can fill the gap between the outer wall of the ventilation pipe 521 and the inner wall of the elastic pipe 531 after being pressed, the annular projection 532 can seal the connection point between the elastic pipe 531 and the ventilation pipe 521, thereby ensuring the sealing performance of the connection point between the main body 510 and the connecting device 520.

[0410] In some embodiments, as shown in Figure 5K, when the elastic tube 531 is connected to the main body 510 or the connecting device 520, an elastic sealing edge 536 may be provided on the tube wall of the elastic tube 531 and / or on the corresponding connecting tube wall of the main body 510 or the connecting device 520 connected to the elastic tube 531. The elastic sealing edge 536 may have an edge of a predetermined width. When the elastic tube 531 is connected to the main body 510 or the connecting device 520, the elastic sealing edge 536 located between the tube wall of the elastic tube 531 and the connecting tube wall of the main body 510 or the connecting device 520 can be pressed and deformed. Since the elastic sealing edge 536 has an edge of a predetermined width, when the elastic sealing edge 536 is pressed and deformed, a contact surface seal can be formed between the edge of the predetermined width and the pipe wall surface in contact with it, thereby forming a surface seal on the circumferential pipe wall at the connection point between the elastic pipe 531 and the main body 510 or between the elastic pipe 531 and the connecting device 520, thereby improving the sealing performance when connecting the elastic pipe 531 to the main body 510 or the connecting device 520. The predetermined width may be the distance H between the end portion 5362 of the free end of the elastic sealing edge 536 shown in Figure 5K and the pipe wall of the conduit on which the elastic sealing edge 536 is provided. Specifically, the elastic sealing edge 536 may extend circumferentially on the pipe wall on which it is provided, and the elastic sealing edge 536 may be provided on the inner or outer wall of the connecting conduit. The elastic sealing edge 536 may be located within the connection gap 537 to seal the connection gap 537. Specifically, the elastic sealing edge 536 may be provided on the axial end face of the connecting conduit (as shown in Figures 5K and 5N), or on the conduit wall other than the axial end face (as shown in Figure 5O). The number of elastic sealing edges 536 may be one or more (as shown in Figure 5O), and the elastic sealing edges 536 may be spaced apart along the axial direction of the conduit wall on which they are provided.

[0411] In the above embodiment, as shown in Figure 5M, in order to limit the axial connection position between the elastic pipe 531 and the main body 510 or between the elastic pipe 531 and the connecting device 520, a stopper portion 522 may be provided so as to surround the outer wall of either the connecting conduit. In Figure 5M, the connecting device 520 ventilation pipe 521When inserted into the elastic tube 531, ventilation pipe 521 A stopper portion 522 may be provided on the outer wall, the stopper portion 522 may abut against the end face of the elastic pipe 531, and the edge of the stopper portion 522 may extend beyond the edge of the connection hole of the elastic pipe 531. By providing the stopper portion 522, the elastic pipe 531 and ventilation pipe 521 Not only can the axial connection position between the elastic tube 531 and ventilation pipe 521 The sealing performance of the connection point between the elastic tube 531 can be further optimized, thereby allowing the elastic tube 531 to ventilation pipe 521 When connecting, ventilation pipe 521 This prevents airflow from overflowing from the connection gap 537 between the outer wall and the inner wall of the elastic pipe 531.

[0412] In the above embodiment, the elastic sealing edge 536 may include a fixed end and a free end. The fixed end may be connected to the pipe wall of the connecting conduit, and the free end may be separated from the pipe wall of the connecting conduit, and the free end may extend along an arc curve in the direction away from the fixed end. Specifically, the free end may extend inclined toward the axial center direction of the connecting conduit with a large inner diameter. As shown in Figure 5M, the bore diameter of the elastic tube 531 is ventilation pipe 521 The elastic sealing edge portion 536 may be larger than the outer diameter, and the free end of the elastic sealing edge portion 536 may be inclined toward the center of the elastic tube 531.

[0413] The ventilation therapy device generates and provides a ventilation airflow higher than atmospheric pressure to the patient, so a high-pressure airflow (ventilation airflow higher than atmospheric pressure) may be configured to flow through the connecting conduit. Elastic pipe 531 ventilation pipe 521 After being connected, the elastic sealing edge 536 connects to the elastic tube 531. ventilation pipe 521At the connection gap 537, the high-pressure airflow can be separated from the external atmospheric pressure outside the connection gap 537. Therefore, a differential pressure may exist between both sides of the elastic sealing edge 536. To avoid the problem of the free end of the elastic sealing edge 536 being blown out and failing to seal when the air passage is under high pressure, the free end of the elastic sealing edge 536 may be installed to extend inclined away from the external atmospheric pressure (for example, inclined along a certain arc), that is, to extend toward the internal center of the elastic pipe 531. Therefore, the high-pressure airflow flowing through the connection gap 537 can apply a downward force (i.e., toward the inside of the pipe) to the free end of the elastic sealing edge 536 that is in contact with the pipe wall, ensuring the sealing performance of the elastic sealing edge 536. More specifically, the free end of the elastic sealing edge 536 may include an intermediate portion 5361 and an end portion 5362. The intermediate portion 5361 may be close to one side of the fixed end. When the connecting conduit is connected, the elastic sealing edge 536 can move and deform so that at least the intermediate portion 5361 contacts the surface of the corresponding pipe wall, forming a contact surface seal in the circumferential direction of the pipe wall. Preferably, the thickness of the intermediate portion 5361 and the terminal portion 5362 of the elastic sealing edge 536 from the fixed end to the free end may be gradually reduced. This makes the thickness of the free end of the elastic sealing edge 536, especially the terminal portion 5362, thinner and more deformable. In this way, the sealing effect can be achieved in a smaller space, so that more space can be saved and used for other components in the same volume. Accordingly, when the connecting conduit stops ventilating, the elastic sealing edge 536 is no longer affected by the high pressure of the flowing airflow. The elastic recovery ability of the elastic sealing edge 536 eliminates the expansion effect between it and the contacting pipe wall. This allows the connecting conduit to be easily separated without applying a large tensile force.

[0414] In some embodiments, the ventilation pipe 521 may include an intake passage 521-1 and an exhaust passage 521-2. Gas enters the intake passage 521-1 via a corresponding elastic tube 531 (e.g., a first elastic tube 5311 communicating with the intake passage 521-1), and is then discharged through the exhaust passage 521-2 via a corresponding elastic tube 531 (e.g., a second elastic tube 5312 communicating with the exhaust passage 521-2) to the external interface of the respiratory ventilation device 500 and inhaled by the user.

[0415] In some embodiments, the main body 510 of the respiratory ventilation device 500 may include a blower (not shown) configured to pressurize the inhaled gas to generate high-pressure gas. The generated high-pressure gas can enter a connecting device 520 via a sealed structure 530. The gas may circulate through the connecting device 520 and be supplied to and inhaled by the user. In some embodiments, the pressure of the high-pressure gas can be equivalent to the pressure of a water column 4 cm to 40 cm high. In some embodiments, a noise reduction device may be further installed within the main body 510 of the respiratory ventilation device 500, and the blower may be installed within the noise reduction device to reduce the blower's noise. The exhaust port of the noise reduction device may be connected to an elastic tube 531. When the sealed structure 530 is connected to the connecting device 520, the high-pressure gas generated by the blower is inhaled through the sealed structure 530. aisle Enter 521-1, exhaust aisle The gas is discharged from 521-2 to the external interface of the respiratory ventilation device 500 and inhaled by the user.

[0416] In some embodiments, there may be only one elastic tube 531, and the elastic tube 531 may be selectively fitted to either the intake passage 521-1 or the exhaust passage 521-2. In some embodiments, the elastic tube 531 may be a single molded structure or a removable connecting structure of multiple segments.

[0417] In some embodiments, the elastic tube 531 may include a first elastic tube 5311 and a second elastic tube 5312. The first elastic tube 5311 may be configured to communicate with an intake passage 521-1, and the second elastic tube 5312 may be configured to communicate with an exhaust passage 521-2. For ease of explanation, Figures 5D to 5E illustrate the structure of the first elastic tube 5311, and in describing the elastic tube 531, the first elastic tube 5311 is used as an example, while the structure of the second elastic tube 5312 may be the same as or similar to that of the first elastic tube 5311, and is not described here.

[0418] The annular projection 532 refers to a projection structure provided circumferentially around the elastic pipe 531 or the ventilation pipe 521. In some embodiments, the annular projection 532 may be provided on the ventilation pipe 521 or the elastic pipe 531. For example, when the ventilation pipe 521 extends into the elastic pipe 531 due to the fitting of the ventilation pipe 521 and the elastic pipe 531 (for example, when the intake passage 521-1 extends into the first elastic pipe 531), the annular projection 532 may be provided on the outer wall of the ventilation pipe 521 (for example, the outer wall of the intake passage 521-1), and in the process of the ventilation pipe 521 extending into the elastic pipe 531, the annular projection 532 generates frictional resistance between itself and the inner wall of the elastic pipe 531, or the annular projection 532 may be provided on the inner wall of the elastic pipe 531, and in the process of the ventilation pipe 521 extending into the elastic pipe 531, the annular projection 532 generates frictional resistance between itself and the outer wall of the ventilation pipe 521. Furthermore, for example, when the elastic pipe 531 extends into the ventilation pipe 521 due to the fitting of the ventilation pipe 521 and the elastic pipe 531 (for example, when the first elastic pipe 531 extends into the intake passage 521-1), the annular projection 532 may be provided on the inner wall of the ventilation pipe 521. In the process of the elastic pipe 531 extending into the ventilation pipe 521, the annular projection 532 generates frictional resistance with the outer wall of the elastic pipe 531, or the annular projection 532 may be provided on the outer wall of the elastic pipe 531, and in the process of the elastic pipe 531 extending into the ventilation pipe 521, the annular projection 532 generates frictional resistance.

[0419] In some embodiments, an annular groove (not shown) may be provided on the outer wall of the ventilation pipe 521 (e.g., exhaust passage 521-2 and / or intake passage 521-1) or on the outer wall of the elastic pipe 531, and the annular groove may be connected to an annular projection 532. For example, if the annular projection 532 is provided on the outer wall of the ventilation pipe 521, the annular groove may be provided on the inner wall of the elastic pipe 531. Also, for example, if the annular projection 532 is provided on the inner wall of the ventilation pipe 521, the annular groove may be provided on the outer wall of the elastic pipe 531. Also, for example, if the annular projection 532 is provided on the outer wall of the elastic pipe 531, the annular groove may be provided on the inner wall of the ventilation pipe 521. Also, for example, if the annular projection 532 is provided on the inner wall of the elastic pipe 531, the annular groove may be provided on the outer wall of the ventilation pipe 521. In some cases, the ventilation pipe 521 may be inserted into the elastic pipe 531 (for example, the exhaust passage 521-2 may be inserted into the second elastic pipe 5312, and / or the intake passage 521-1 may be inserted into the first elastic pipe 5311 and the annular projection 532 may be placed in the annular groove), or when the elastic pipe 531 is inserted into the ventilation pipe 521, the annular groove can restrict the movement of the annular projection 532, thereby restricting the relative movement between the elastic pipe 531 and the ventilation pipe 521, and further improving the robustness and sealing performance of the connection between the main body 510 and the connecting device 520.

[0420] In some embodiments, the annular groove may be an annular opening provided in the ventilation pipe 521 (e.g., exhaust passage 521-2 and / or intake passage 521-1) or the elastic pipe 531. In some embodiments, the annular groove may be a groove structure provided on the surface of the ventilation pipe 521 (e.g., exhaust passage 521-2 and / or intake passage 521-1) or the elastic pipe 531. As a mere example, the groove structure may include groove sidewalls. The groove sidewalls may be annular ribs provided on the outer wall of the ventilation pipe 521, and two adjacent annular ribs may limit the annular groove or a part thereof. Taking the intake passage 521-1 as an example, there may be at least two annular projections 532 and at least two annular ribs. At least two annular ribs and at least two annular projections 532 may be provided at equal intervals on the outer wall of the intake passage 521-1 and the inner wall of the first elastic pipe 5311, respectively. In the process of inserting the intake passage 521-1 into the first elastic tube 5311, the annular rib may be inserted into the gap formed by two adjacent annular projections 532, and the annular projections 532 may be inserted into an annular groove formed by the two adjacent annular ribs. In this way, the robustness and sealing performance of the connection between the main body 510 and the connecting device 520 can be further improved. In some embodiments, the annular rib may have a certain elasticity, and when the annular projection 532 is pressed against the annular rib, the annular rib can be deformed so that the annular projection 532 enters the annular groove. In some embodiments, the annular projection 532 and the annular rib may be the same or similar.

[0421] In some embodiments, the annular projection 532 may be strip-shaped, and as shown in Figures 5A to 5E, the cross-sectional shape of the annular projection 532 may include triangular, rectangular, hemispherical, etc. In some specific embodiments, the cross-sectional shape of the annular projection 532 may be triangular. In some embodiments, the annular projection 532 may be rod-shaped, conical, spherical, hemispherical, or columnar.

[0422] In some embodiments, the annular projection 532 may be continuous. For example, the annular projection 532 may be strip-shaped, and the strip-shaped annular projection 532 may be arranged spirally around the inner wall of the elastic tube 531. In this case, the annular projection 532 can be considered continuous. In some embodiments, the annular projection 532 may be a stepped projection structure. For example, the annular projection 532 may include a plurality of sub-projection structures, and the plurality of sub-projection structures may be arranged at intervals around the inner wall of the elastic tube 531. In some embodiments, the shape of the sub-projection structure may include rod-shaped, conical, spherical, hemispherical, or columnar shapes.

[0423] In some embodiments, the number of annular projections 532 may be one. For example, if there is one annular projection 532, the annular projection 532 may be strip-shaped, and the strip-shaped annular projection 532 may be arranged spirally around the inner wall of the elastic tube 531.

[0424] In some embodiments, the number of annular projections 532 may be more than one, and the multiple annular projections 532 may be provided at equal intervals along the longitudinal direction of the elastic tube 531 or ventilation tube 521 to improve the sealing performance and robustness of the connection between the main body 510 and the connecting device 520. The longitudinal direction of the elastic tube 531 or ventilation tube 521 is indicated by arrow X in Figure 5A. In some embodiments, the multiple annular projections 532 may all be strip-shaped, and the multiple strip-shaped annular projections 532 may be arranged spirally, that is, the multiple annular projections 532 may be distributed at intervals along a spiral trajectory. As just one example, in the embodiment shown in Figure 5C, the number of annular projections 532 on the first elastic tube 5311 is two. In some embodiments, the multiple annular projections 532 may be the same or different. As just one example, in the embodiment shown in Figure 5C, the two annular projections 532 may be the same shape and size. In other embodiments, the annular projection 532 may be provided on the inner wall of the elastic tube 531, and the annular projection 532 may include a first annular projection and a second annular projection. The first annular projection may be close to the inlet (e.g., the inlet 535 of the first elastic tube 5311 in Figure 5D), and the second annular projection may be further away from the inlet. The inner diameter of the elastic tube (e.g., the first elastic tube 5311 in Figure 5D) may gradually decrease from the side closer to the inlet to the side further away from the inlet, the height and width of the first annular projection may be greater than the height and width of the second annular projection, and both the first and second annular projections may be able to contact the outer walls of the intake pipe (e.g., the intake passage 521-1 in Figure 5A) and / or the exhaust pipe (e.g., the exhaust passage 521-2 in Figure 5A). The height of the annular projection 532 may be the dimension of the annular projection 532 in the radial direction of the elastic tube 531. The radial direction of the elastic tube 531 is the direction of any straight line passing through the central axis of the elastic tube 531 in the plane formed by arrows Z and Y in Figure 5C. The width of the annular projection 532 is the dimension of the annular projection 532 in the longitudinal direction of the elastic tube 531, as shown by arrow X in Figure 5C. In some embodiments, the longitudinal direction of the main body 510 may be parallel to the longitudinal direction of the elastic tube 531, the thickness direction of the main body 510 may be represented by arrow Z, and the width direction of the main body 510 may be represented by arrow Y.

[0425] In some embodiments, the annular projection 532 may protrude away from the insertion direction of the elastic tube 531 and the ventilation tube 521. For example, if the fitting method between the ventilation tube 521 and the elastic tube 531 is such that the ventilation tube 521 extends into the elastic tube 531 (for example, the intake passage 521-1 extends into the first elastic tube 531), the annular projection 532 may protrude away from the insertion opening 535 of the elastic tube 531, that is, it may extend at an angle away from the insertion opening 535 of the elastic tube 531, thereby allowing the ventilation tube 521 to extend smoothly into the elastic tube 531 through the insertion opening 535 and effectively preventing the ventilation tube 521 from detaching from the elastic tube 531. In this way, the robustness and sealing performance of the connection between the main body 510 and the connecting device 520 can be further improved. As a mere example, as shown in Figure 5E, taking the first elastic tube 5311 as an example, the annular projection 532 of the first elastic tube 5311 includes a first side wall 5321 and a second side wall 5322. The first side wall 5321 may be close to the inlet 535 (i.e., the opening into which the intake passage 521-1 of the first elastic tube 5311 is inserted), and the second side wall 5322 may be further away from the inlet 535 of the first elastic tube 5311, and the radial length (i.e., diameter) of the first side wall 5321 may be greater than the radial length (i.e., diameter) of the second side wall 5322, and the side walls on both sides of the annular projection 532 may be asymmetrical and may be inclined inward toward the body 510. During the process of inserting the intake passage 521-1 into the first elastic tube 5311, the annular projection 532 protrudes at an angle, which reduces the component force of the frictional resistance generated between the end of the annular projection 532 and the outer wall of the intake passage 521-1 in the direction of insertion of the intake passage 521-1, allowing the intake passage 521-1 to be inserted more smoothly into the first elastic tube 5311. During the process of withdrawing the intake passage 521-1 from the first elastic tube 5311, the component force of the frictional resistance generated between the end of the annular projection 532 and the outer wall of the intake passage 521-1 in the direction of withdrawal and disengagement of the intake passage 521-1 can be increased, effectively preventing the intake passage 521-1 from disengaging from the first elastic tube 5311.

[0426] In some embodiments, the annular projection 532 and the elastic tube 531 or ventilation tube 521 may be manufactured and assembled independently. In some embodiments, the annular projection 532 and the elastic tube 531 or ventilation tube 521 may be manufactured integrally, for example by injection molding. In some embodiments, the elastic tube 531 may be a rubber tube, a silicone tube, a plastic tube, or the like.

[0427] In some embodiments, a limit groove 533 may be provided in the outer wall of the elastic pipe 531 or the outer wall of the ventilation pipe 521 (for example, intake passage 521-1 and / or exhaust passage 521-2), and the main body 510 may include a limit structure (not shown). The limit structure may be configured to fit the limit groove 533. When the limit structure is fitted into the limit groove 533, it can restrict the radial range of movement of the elastic pipe 531 or the ventilation pipe 521. For example, the limit groove 533 may be provided in the outer wall of the elastic pipe 531, and if the ventilation pipe 521 extends into the elastic pipe 531, the limit groove 533 may be used to restrict the radial range of movement of the elastic pipe 531. Alternatively, for example, the limit groove 533 may be provided in the outer wall of the ventilation pipe 521, and if the elastic pipe 531 extends into the ventilation pipe 521, the limit groove 533 may be used to restrict the radial range of movement of the ventilation pipe 521. As a mere example, as shown in Figures 5B to 5E, a limit groove 533 is provided on the outer wall of the first elastic tube 5311, and the limit groove 533 is arranged along the circumferential direction of the first elastic tube 5311. The limit structure may include a notch opened in a card plate (not shown) connected to the main housing 511, and the limit groove 533 of the first elastic tube 5311 can engage with the notch in the card plate. In the process of the intake passage 521-1 extending into the first elastic tube 5311, the force generated by the contact between the intake passage 521-1 and the annular projection 532 can cause the first elastic tube 5311 to move radially. In this case, the limit structure can limit the radial range of motion of the first elastic tube 5311.

[0428] In some embodiments, the outer diameter of the limit groove 533 is smaller than the inner diameter of the limit structure, which ensures a certain amount of space for movement in the elastic tube 531 or the ventilation tube 521, making it convenient to smoothly insert the ventilation tube 521 into the elastic tube 531 or the elastic tube 531 into the ventilation tube 521. As a mere example, if the intake passage 521-1 extends into the first elastic tube 5311, and the central axis of the intake passage 521-1 is slightly offset from the central axis of the first elastic tube 5311, for example, if the central axis of the intake passage 521-1 is slightly offset upward in the radial direction (e.g., Z-axis) of the first elastic tube 5311, the annular projection 532 can contact the upper part of the outer wall of the intake passage 521-1 and generate an acting force. Because the outer diameter of the limit groove 533 is smaller than the inner diameter of the limit structure, a gap exists between the limit structure and the limit groove 533. This ensures a certain amount of space for movement in the first elastic tube 5311, and the resulting force causes the first elastic tube 5311 to move radially (e.g., along the Z-axis). Finally, the central axis of the first elastic tube 5311 and the central axis of the intake passage 521-1 coincide, and the intake passage 521-1 is smoothly inserted into the first elastic tube 5311. In some embodiments, the ratio of the outer diameter of the limit groove 533 to the inner diameter of the limit structure may be in the range of 0.5 to 1. In some embodiments, the ratio of the outer diameter of the limit groove 533 to the inner diameter of the limit structure may be in the range of 0.6 to 1. In some embodiments, the ratio of the outer diameter of the limit groove 533 to the inner diameter of the limit structure may be in the range of 0.7 to 1.

[0429] In some embodiments, the limit groove 533 includes one or more limit protrusions 534, which may be provided along the circumferential direction of the outer wall of the limit groove 533. The distance between the outer wall of the limit protrusion 534 and the central axis of the limit groove 533 may be greater than or equal to the inner diameter of the limit structure. As just one example, if, during the process of the intake passage 521-1 extending into the first elastic tube 5311, the central axis of the intake passage 521-1 is slightly offset from the central axis of the first elastic tube 5311 (for example, offset upward along the radial direction (e.g., the Z-axis)), the first elastic tube 5311 will contact the upper part of the outer wall of the intake passage 521-1, generating a force that deforms the limit projection 534, ensuring coaxiality between the central axis of the intake passage 521-1 and the central axis of the first elastic tube 5311, thereby allowing the intake passage 521-1 to extend easily by the first elastic tube 5311. In some embodiments, the limit projection 534 may be made of rubber, plastic, silicone, or the like.

[0430] In some embodiments, the connection between the ventilation pipe 521 (e.g., intake passage 521-1 and / or exhaust passage 521-2) and the sealing structure 530 (e.g., elastic tube 531) has a gradually increasing diameter. As merely an example, as shown in Figures 5A, 5B, 5F and 5H, the intake passage 521-1 includes a first intake end 5211 and a first exhaust end 5212. The exhaust passage 521-2 includes a second intake end 5221 and a second exhaust end 5222. The first intake end 5211 is inserted into the first elastic tube 5311, and the high-pressure gas is discharged from the intake passage 521-1 via the first exhaust end 5212. The second exhaust end 5222 is inserted into the second elastic tube 5312 and connected to the external interface of the respiratory ventilation device 500. The gas discharged from the first exhaust end 5212 enters the exhaust passage 521-2 via the second inhalation end 5221 and is discharged to the external interface of the respiratory ventilation device 500 via the second exhaust end 5222. The outer diameter of the first inhalation end 5211 gradually decreases from the side closer to the first exhaust end 5212 toward the side further away from the first exhaust end 5212, thereby allowing the first inhalation end 5211 to be smoothly inserted into the first elastic tube 5311. The outer diameter of the second exhaust end 5222 gradually decreases from the side closer to the second intake end 5221 toward the side further away from the second intake end 5221, thereby allowing the second exhaust end 5222 to be smoothly inserted into the second elastic tube 5312 and reducing the frictional resistance from the annular projection 532 that the intake passage 521-1 receives when inserted into the first elastic tube 5311 and the frictional resistance from the annular projection 532 that the exhaust passage 521-2 receives when inserted into the second elastic tube 5312. As another example, as shown in Figure 5E, the inner diameter of the first elastic tube 5311 gradually decreases from the side closer to the inlet 535 of the first elastic tube 5311 toward the side further away from the inlet 535 of the first elastic tube 5311, thereby allowing the intake tube (for example, the intake passage 521-1 in Figure 5A) to be smoothly inserted into the first elastic tube 5311.

[0431] In some embodiments, the longitudinal directions of the first intake end 5211 and the second exhaust end 5222 may be parallel to the longitudinal direction of the elastic tube 531. The longitudinal directions of the first exhaust end 5212 and the second intake end 5221 may be parallel to the longitudinal direction of the elastic tube 531. The radial direction of the first exhaust end 5212 and the second intake end 5221 is the direction of any straight line passing through the central axis of the intake passage 521-1 and the exhaust passage 521-2 in the plane formed by arrows Z and Y. The longitudinal directions of the first exhaust end 5212 and the second intake end 5221 may be parallel to the longitudinal direction of the elastic tube 531. The longitudinal directions of the first exhaust end 5212 and the second intake end 5221 may also be parallel to the width direction of the top cover 526, indicated by arrow Y. The radial direction of the first exhaust end 5212 and the second intake end 5221 is the direction of any straight line passing through the central axis of the intake passage 521-1 and the exhaust passage 521-2 in the plane formed by arrows Z and X.

[0432] In some embodiments, the ratio of the maximum outer diameter of the first intake end 5211 to the minimum outer diameter of the first intake end 5211 may be in the range of 2 to 1.05. In some embodiments, the ratio of the maximum outer diameter of the first intake end 5211 to the minimum outer diameter of the first intake end 5211 may be in the range of 2 to 1.1. In some embodiments, the ratio of the maximum outer diameter of the first intake end 5211 to the minimum outer diameter of the first intake end 5211 may be in the range of 2 to 1.5. In some embodiments, the ratio of the maximum outer diameter of the second exhaust end 5222 to the minimum outer diameter of the second exhaust end 5222 may be the same as or similar to that of the first intake end 5211.

[0433] In some embodiments, a chamfer is provided at the connection point between the ventilation pipe 521 (e.g., intake passage 521-1 and / or exhaust passage 521-2) and the sealing structure 530 (e.g., elastic pipe 531) to further minimize the frictional resistance caused by the extension of the ventilation pipe 521 into the elastic pipe 531, or, if the elastic pipe 531 extends into the ventilation pipe 521, the frictional resistance caused by the pressure on the annular projection 532. As just one example, as shown in Figure 5I, an arc-shaped chamfer is provided on the end face of the first intake end 5211 of the intake passage 521-1. As another example, an inclined chamfer is provided on the end face of the first intake end 5211 of the intake passage 521-1. As a simple example, as shown in Figure 5E, by providing an arc-shaped chamfer at the insertion opening 535 of the first elastic tube 5311, not only is the dimension of the insertion opening 535 of the first elastic tube 5311 enlarged, but frictional resistance between the insertion opening 535 of the first elastic tube 5311 and the intake pipe (for example, the intake passage 521-1 in Figure 5A) is reduced, and the intake pipe can be easily and accurately positioned and introduced when it extends into the first elastic tube 5311.

[0434] In some embodiments, as shown in Figures 5B and 5F, a first stopper 524 is provided on the outer wall of the ventilation pipe 521 (e.g., intake passage 521-1 and / or exhaust passage 521-2), and the first stopper 524 can limit the length to which the intake passage 521-1 and / or exhaust passage 521-2 are inserted into the corresponding elastic pipe 531. As just one example, the first stopper 524 may be a stopper ring provided on the outer wall of the intake passage 521-1 and exhaust passage 521-2. Since the outer diameter of the stopper ring is larger than the inner diameter of the first elastic pipe 5311 (for example, the inner diameter of the insertion opening 535 in Figure 5D) and the inner diameter of the second elastic pipe 5312, when the intake passage 521-1 and the exhaust passage 521-2 are inserted into the first elastic pipe 5311 and the second elastic pipe 5312, respectively, the stopper ring abuts against the insertion opening end faces of the first elastic pipe 5311 and the second elastic pipe 5312, thereby restricting further extension of the intake passage 521-1 and the exhaust passage 521-2. In some embodiments, when the elastic pipe 531 extends into the ventilation pipe 521, the first stopper 524 may be provided on the outer wall of the elastic pipe 531.

[0435] In some embodiments, as shown in Figures 5A to 5G, a second stopper 525 is provided on the top cover 526 of the connecting device 520, and the second stopper 525 can limit the length to which the ventilation pipe 521 (e.g., intake passage 521-1 and / or exhaust passage 521-2) is inserted into the corresponding elastic pipe 531. As just one example, the main body 510 may include a main body housing 511, and the first elastic pipe 5311 and the second elastic pipe 5312 are provided within the main body housing 511. The second stopper 525 may include tabs provided on the upper and lower surfaces of the top cover 526, the outer diameter of which is greater than the inner diameter of the main body housing 511. Therefore, if the intake passage 521-1 and the exhaust passage 521-2 extend to a certain distance within the first elastic tube 5311 and the second elastic tube 5312, respectively, the second stopper 525 can come into contact with the main housing 511, thereby limiting further extension of the intake passage 521-1 and the exhaust passage 521-2.

[0436] In some embodiments, the connecting device 520 includes a water tank or a cover plate without a water tank.

[0437] In some embodiments, as shown in Figures 5F and 5G, when the connecting device 520 is a water tank, liquid is stored in the water tank, the first exhaust end (not shown) of the intake passage 521-1 is connected to the inside of the water tank, and the second intake end (not shown) of the exhaust passage 521-2 is connected to the inside of the water tank. The gas pressurized by the blower enters the inside of the water tank via the intake passage 521-1, moves to the top of the liquid level inside the water tank, is discharged via the exhaust passage 521-2, and is inhaled by the user. In some embodiments, a heating device or heat conduction device may be further provided in the water tank, which can raise the temperature of the liquid in the water tank to generate water vapor, warming and humidifying the gas inhaled by the user. Further description of the water tank is omitted here and should be seen in Figures 6A to 6I, 7A to 7G and their related descriptions.

[0438] In some embodiments, as shown in Figures 5H to 5J, the connecting device 520 is connected to the ventilation pipe 521 in a communication structure, for example, in the case of a cover plate without a water tank, the first exhaust end 5212 of the intake passage 521-1 and the second intake end 5221 of the exhaust passage 521-2 are in communication. The gas pressurized by the blower enters the exhaust passage 521-2 via the intake passage 521-1 and is discharged to the external interface of the respiratory ventilation device (for example, the respiratory ventilation device 500 in Figure 5A) and inhaled by the user.

[0439] In some embodiments, guide ribs 523 are provided on the outer wall of the ventilation pipe 521 (e.g., intake passage 521-1 and / or exhaust passage 521-2) of the connecting device 520 or on the outer wall of the elastic pipe 531, which is convenient for positioning the ventilation pipe 521 while it extends into the elastic pipe 531, or for positioning the elastic pipe 531 while it extends into the ventilation pipe 521. As just one example, as shown in Figures 5A and 5H to 5J, the main housing 511 may include a housing top wall 512 and a housing bottom wall 513. The cover plate without a water tank may include a top cover 526, the intake passage 521-1 and the exhaust passage 521-2 are provided on the top cover 526, and a guide rib 523 is provided on the top of the outer wall of the intake passage 521-1, the guide rib 523 extending along the central axis direction of the intake passage 521-1. During the process of installing the cover plate without a water tank, the intake passage 521-1 is inserted into the main housing 511, moves a certain distance, and then extends into the first elastic tube (for example, the first elastic tube 5311 in Figure 5B). During the movement process, the intake passage 521-1 may shift, failing to align with the first elastic tube and thus unable to extend into it. After providing a guide rib 523 in the intake passage 521-1, the guide rib 523 can be brought into contact with the top wall 512 of the housing to assist the user in aligning the intake passage 521-1. After the guide rib 523 in the intake passage 521-1 contacts the top wall 512 of the housing, it indicates that the intake passage 521-1 has been aligned with the first elastic tube. At this point, if the intake passage 521-1 is controlled to continue moving into the first elastic tube, it can be fitted with the first elastic tube, effectively improving the installation efficiency of the cover plate without a water tank. In another example, guide ribs 523 are provided on the top of the outer wall of the intake passage 521-1 and the top of the outer wall of the exhaust passage 521-2. When installing a cover plate without a water tank, the guide ribs 523 of the intake passage 521-1 and the guide ribs 523 of the exhaust passage 521-2 can be brought into contact with the top wall 512 of the housing to achieve guiding and positioning.

[0440] In some embodiments, the guide rib 523 is removably connected to the ventilation pipe 521 (e.g., intake passage 521-1 and / or exhaust passage 521-2) or elastic pipe 531. Removable connection methods include adhesive, screw connection, magnetic attraction connection, etc. In some embodiments, the guide rib 523 is fixedly connected to the ventilation pipe 521 (e.g., intake passage 521-1 and / or exhaust passage 521-2) or elastic pipe 531. As just one example, the guide rib 523, intake passage 521-1, exhaust passage 521-2, or elastic pipe 531 are manufactured by integral molding.

[0441] In some embodiments, the inner wall of the main body housing 511 is provided with a guide groove (not shown) that fits the guide rib 523. When the guide groove engages with the guide rib 523, the accuracy of guiding and positioning relative to the cover plate without the water tank can be improved.

[0442] In some embodiments, as shown in Figure 5H, a flow-limiting structure 527 is provided between the intake passage 521-1 and the exhaust passage 521-2 of the cover plate without a water tank to adjust the air resistance between the intake passage 521-1 and the exhaust passage 521-2 to be close to the air resistance of the intake and exhaust pipes of the water tank in the embodiment. In some embodiments, the flow-limiting structure 527 may include a first flow-limiting conduit 5271 and a second flow-limiting conduit 5272, the first flow-limiting conduit 5271 being connected to the first exhaust end 5212 of the intake passage 521-1, and the second flow-limiting conduit 5272 being connected to the second intake end 5221 of the exhaust passage 521-2. The first flow-limiting conduit 5271 is connected to the second flow-limiting conduit 5272. The inner diameter of the first flow-limiting conduit 5271 gradually decreases from the side away from the second flow-limiting conduit 5272 towards the side approaching the second flow-limiting conduit 5272. The inner diameter of the second flow-limiting passage 5272 gradually decreases from the side away from the first flow-limiting passage 5271 towards the side approaching the first flow-limiting passage 5271. In some embodiments, the maximum value of the inner diameter of the first flow-limiting conduit 5271 is the same as the inner diameter of the intake passage 521-1. The ratio of the maximum value of the inner diameter of the first flow-limiting conduit 5271 to the minimum value of the inner diameter of the intake passage 521-1 may be in the range of 0.9 to 0.05. The ratio of the maximum value of the inner diameter of the first flow-limiting conduit 5271 to the minimum value of the inner diameter of the intake passage 521-1 may be in the range of 0.9 to 0.075. The ratio of the maximum inner diameter of the first flow-limiting conduit 5271 to the minimum inner diameter of the intake passage 521-1 may be in the range of 0.9 to 0.1. In some embodiments, the second flow-limiting conduit 5272 is the same as or similar to the first flow-limiting conduit 5271.

[0443] In some embodiments, the flow-limiting structure 527 may include a third flow-limiting conduit (not shown) connected to the first exhaust end 5212 of the intake passage 521-1 and the second intake end 5221 of the exhaust passage 521-2. The inner diameter of the third flow-limiting conduit is smaller than the inner diameters of the intake passage 521-1 and the exhaust passage 521-2. In some embodiments, the minimum inner diameter of the third flow-limiting conduit is the same as or similar to the minimum inner diameter of the first flow-limiting conduit 5271.

[0444] In some embodiments, the connector 520 may include a locking device configured to lock the mated connector 520 to the body 510 and prevent the connector 520 from detaching from the body 510. In some embodiments, the locking device may include one or more snap-in structures for joining with the body 510. In some embodiments, as shown in Figures 5A and 5F to 5J, the snap-in structure may include a first buckle 528, and a mounting groove is provided on the upper surface of the top cover 526 of the connector 520. The first buckle 528 is provided in the mounting groove, and a first tightening slot 514 is provided in the top wall 512 of the housing of the body 510 to fit the first buckle 528. When it is necessary to attach the body 510 and the connector 520, the first buckle 528 can engage with the first tightening slot 514 from the inside of the body housing 511 to fix the body 510 and the connector 520 in place. If it is necessary to remove the main body 510 and the connecting device 520, the lock between the main body 510 and the connecting device 520 can be released by triggering the first buckle 528 to exit the first tightening slot 514. In some embodiments, the snap-in structure may include a push button provided on the upper surface of the top cover 526, the first buckle 528, and an elastic part, the push button being connected to the first buckle 528, and the elastic part being provided between the upper surface of the top cover 526 and the push button. The push button can be pressed downward by an external force, moving the first buckle 528 downward, allowing the connecting device 520 to be easily attached to the main body 510, or removing the first buckle 528 from the first tightening slot 514, allowing the connecting device 520 to be easily removed from the main body 510. When the external force is released, the elastic part repels the push button upward, locking the connecting device 520 to the main body 510, or allowing it to return to its original position after being removed. In some embodiments, the number of first buckles 528 may be one or more, and the number of first tightening slots 514 may be the same as the number of first buckles 528. For example, in the embodiment shown in Figure 5F, there may be two first buckles 528, and correspondingly, there may be two first tightening slots 514.Further details about the push buttons can be found in Figures 7A to 7F and related explanations; the explanation is omitted here.

[0445] In some embodiments, the snap-in structure may include a second buckle 529, which may be located on the underside of the top cover 526 of the connector 520, and a second tightening slot 515 is provided in the bottom wall 513 of the housing of the main body 510 to accommodate the second buckle 529. When it is necessary to attach the main body 510 to the connector 520, the second buckle 529 can be engaged in the second tightening slot 515 from the inside of the main body housing 511, thereby permanently locking the main body 510 to the connector 520. Thus, the main body 510 is permanently locked to the connector 520. When it is necessary to remove the main body 510 to the connector 520, the lock between the main body 510 and the connector 520 can be released by triggering the second buckle 528 to retract it from the second tightening slot 515. In some embodiments, the number of second buckles 529 may be one or more, and the number of second tightening slots 515 may be the same as the number of second buckles 529. For example, in the embodiment shown in Figure 5G, there may be two second buckles 529, and correspondingly, there may be two second tightening slots 515.

[0446] In some embodiments, the snap-in structure may include both a first buckle 528 and a second buckle 529, thereby improving the locking effect between the main body 510 and the connecting device 520.

[0447] In some embodiments, the locking device may further include a magnetic attraction member. For example, a magnetic attraction portion may be provided on the upper surface of the top cover 526 of the connecting device 520, and if the intake passage 521-1 and exhaust passage 521-2 extend to the corresponding elastic pipe 531, a magnet may be provided on the top wall 512 of the main housing 511, and the magnet may be attracted to the magnetic attraction portion to lock the main body 510 and the connecting device 520.

[0448] In the respiratory ventilation device according to the above embodiment, an annular projection is provided on the ventilation pipe or the elastic pipe of the sealed structure, allowing the annular projection to be pressed and deformed during the fitting process between the ventilation pipe and the elastic pipe of the connecting device. After deformation, the annular projection generates a large frictional force between the ventilation pipe and the elastic pipe, limiting the separation of the ventilation pipe and the elastic pipe. This not only ensures the airtightness and robustness of the connection between the ventilation pipe and the elastic pipe, but also simplifies the assembly process and effectively improves assembly efficiency.

[0449] Currently, when using respiratory ventilation equipment, static and dynamic backflow can occur. Static backflow can occur when the respiratory ventilation equipment is placed on an incline, causing the fluid to submerge the first or second inlet of the water tank. Dynamic backflow can occur when the respiratory ventilation equipment is transported or moved, causing the inside of the water tank to shake back and forth, colliding with the side walls of the water tank, and potentially resulting in liquid splashing. Both static and dynamic backflow can cause water from the water tank inside the respiratory ventilation equipment to flow back into the gas passages, potentially affecting the normal use of the respiratory ventilation equipment, causing patient suffocation, and in serious cases, potentially endangering the patient's life. Based on this, some embodiments of this disclosure provide a water tank in which a backflow prevention member can reduce the probability of water from the water tank flowing back into the gas passages, ensuring the normal use of the respiratory ventilation equipment and avoiding the risk of patient suffocation.

[0450] Figure 6A is a schematic diagram of the structure of a water tank according to some embodiments of the present disclosure. Figure 6B is a schematic diagram of the structure of the lower housing of a water tank according to some embodiments of the present disclosure. Figure 6C is a schematic diagram of the structure of the upper housing of a water tank according to some embodiments of the present disclosure.

[0451] As shown in Figures 6A to 6C, the water tank 600 may include a water tank housing 610, a heat transfer member 620, an intake passage 630, an exhaust passage 640, and a backflow prevention member. The water tank housing 610 may include an upper water tank housing 611 and a lower water tank housing 612. The upper water tank housing 611 and the lower water tank housing 612 are hollow inside and can work together to form a water tank cavity for containing liquid. The intake passage 630 and the exhaust passage 640 are both provided in the upper water tank housing 611, and the heat transfer member 620 is provided in the lower water tank housing 612.

[0452] The water tank 600 can generate steam from the liquid in the water tank cavity by heat transfer, and the steam may be pure water vapor or a mixture of pure water and a medicinal solution. The water tank 600 mixes the steam with the gas that enters the respiratory ventilation device through the inspiratory passage 630 to produce a mixed gas, and discharges the mixed gas through the exhaust passage 640, thereby allowing the patient to breathe humidified or medicinal solution vapor-containing gas.

[0453] The water tank housing 610 may have various shapes. For example, the water tank housing 610 may be rectangular, square, cylindrical, conical, or other shapes. The water tank cavity in the water tank housing 610 may be configured to contain liquid, and the water tank cavity may have various shapes consisting of multiple wall-like structures. The material of the water tank housing 610 may be polycarbonate, polystyrene, polypropylene, polymethyl methacrylate, or any other viable material.

[0454] The heat transfer member 620 may be configured to heat the liquid in the water tank cavity, converting the liquid from a liquid state to a vapor state. Once the liquid is converted to vapor, the vapor can rise to the space above the water tank cavity. The heat transfer member 620 may be a plurality of contact or non-contact heat transfer members capable of conducting heat to the liquid. The heat transfer member 620 may be located at various positions in the lower water tank housing 612. As shown in Figure 6B, the heat transfer member 620 may be located at the bottom of the lower water tank housing 612. In some embodiments, the heat transfer member 620 may be located at other positions in the lower water tank housing 612. For example, the heat transfer member 620 may be located on one or more side walls of the lower water tank housing 612.

[0455] In some embodiments, as shown in Figure 6B, guide ribs 612-1 are provided on the side of the lower water tank housing 612. The guide ribs 612-1 may extend along the mounting direction of the respiratory ventilation device body and the water tank 600. The respiratory ventilation device body may be provided with guide grooves that match the guide ribs 612. When the water tank 600 is attached to the respiratory ventilation device body, the guide ribs 612-1 may extend into the guide grooves of the respiratory ventilation device body and continue to extend along the direction of extension of the guide grooves for further attachment. The matching of the guide ribs 612-1 with the guide grooves can serve as a guide and positioning mechanism. In some embodiments, there may be two guide ribs 612-1 provided symmetrically on both sides of the lower water tank housing 612. The structure of the guide ribs 612-1 may be a strip-like structure, and may be a sealed or semi-sealed structure, such as a semi-sealed annular racetrack structure.

[0456] The intake passage 630 may be configured to introduce gas into the water tank cavity. As shown in Figure 6C, the intake passage 630 may include a first water tank intake port 631 and a first water tank exhaust port 632. The first water tank intake port 631 is located outside the upper water tank housing 611 and is used to allow outside air from the water tank 600 to enter the intake passage 630. The first water tank intake port 631 is connected to the exhaust port of the respiratory ventilation device body, and gas discharged from the exhaust port of the respiratory ventilation device body can enter the intake passage 630 via the first water tank intake port 631. The first water tank exhaust port 632 is located inside the upper water tank housing 611 and is used to allow gas in the intake passage 630 to enter the water tank cavity. When the gas in the intake passage 630 enters the water tank cavity, it mixes with the vapor in the space above the water tank cavity to produce a mixed gas. The intake passage 630 may be a hollow conduit of various shapes. For example, the intake passage 630 may be a circular hollow conduit. Alternatively, for example, the intake passage 630 may be a rectangular hollow conduit.

[0457] The exhaust passage 640 may be configured to discharge gas from the water tank cavity. As shown in Figure 6C, the exhaust passage 640 may include a second water tank intake port 641 and a second water tank exhaust port 642. The second water tank intake port 641 is located inside the upper water tank housing 611 and is used to allow gas from the water tank cavity to enter the exhaust passage 640. The second exhaust port 642 is located outside the upper water tank housing 611 and is used to discharge gas from the exhaust passage 640. The second water tank exhaust port 642 may be configured to connect to an external trachea, with one end of the external trachea connected to the second water tank exhaust port 642 and the other end connected to a patient user interface 7000 (e.g., a breathing mask or nasal catheter). Similar to the intake passage 630, the exhaust passage 640 may be a hollow conduit of various shapes.

[0458] A backflow prevention member may be provided in the upper water tank housing 611 and configured to prevent the liquid in the water tank cavity from flowing back into the intake passage 630 and / or exhaust passage 640. In some embodiments, the backflow prevention member may include one or two of the first bend 633 in the intake passage 630 and the second bend 643 in the exhaust passage 640, and / or a flow guide rib 650. See below for a further description of the first bend 633, the second bend 643, and the flow guide rib 650.

[0459] In some embodiments of this disclosure, a backflow prevention member is provided in the water tank 600 to prevent backflow of liquid in the water tank 600 into the intake passage 630 and / or exhaust passage 640. This prevents failure of the respiratory ventilation device due to liquid flowing into the respiratory ventilation device body via the intake passage 630 and prevents suffocation of the patient due to liquid flowing to the patient via the exhaust passage 640. On the other hand, by forming a water tank cavity that passes directly through the water tank housing 610 with a separable upper water tank housing 611 and a separable lower water tank housing 612, the capacity of the water tank relative to the liquid can be maintained, and the overall size of the water tank 600 can be kept small, thus avoiding wasted space due to the addition of a built-in water tank cavity.

[0460] In some embodiments, the intake passage 630 and / or exhaust passage 640 may be provided integrally with or separately from the inner surface of the water tank upper housing 611. When the intake passage 630 and / or exhaust passage 640 are provided integrally with the inner surface of the water tank upper housing 611, the intake passage 630 and / or exhaust passage 640 are connected to the inner surface of the water tank upper housing 611, and the inner surface of the water tank upper housing 611 is the intake aisle 630 and / or exhaust aisle Together with the other side walls of 640, a conduit structure is formed that is sealed around the periphery and open on both sides. As shown in Figure 6C, intake aisle 630 one side and exhaust aisle One side of 640 is directly connected to the inner surface of the upper water tank housing 611, thereby providing intake air. aisle 630 and exhaust aisle 640 forms a conduit structure that is sealed around the periphery and open on both sides. In some embodiments of this disclosure, by integrally providing the intake passage 630 and / or exhaust passage 640 with the inner surface of the upper water tank housing 611, the integrally provided structure can be produced by integral molding, reducing the difficulty and cost of producing the water tank. The cross-sections of the intake passage 630 and exhaust passage 640 may be circular, rectangular, or other irregular shapes, and are determined according to actual needs or processing requirements.

[0461] When the intake passage 630 and / or exhaust passage 640 are provided separately from the inner surface of the upper water tank housing 611, the intake passage 630 and / or exhaust passage 640 may be separated from the inner surface of the upper water tank housing 611. Furthermore, the intake passage 630 and / or exhaust passage 640 may be detachably connected to the upper water tank housing 611. In some embodiments of the present disclosure, providing the intake passage 630 and / or exhaust passage 640 separately from the inner surface of the upper water tank housing 611 and making at least a portion of the structure of the intake passage 630 and / or exhaust passage 640 detachable from the upper water tank housing 611 facilitates the removal, cleaning, and replacement of the intake passage 630 and / or exhaust passage 640, ensures the cleanliness of the gas passages, and improves convenience during use.

[0462] In some embodiments, the distance between the first water tank exhaust port 632 and the second water tank intake port 641 may be greater than a threshold (e.g., 4 cm). SuckingThe gas entering through the gas port 631 first enters the water tank cavity, mixes with the steam in the water tank cavity to form a mixed gas, and this mixed gas enters the exhaust passage 640 from the second water tank intake port 641. The distance between the first water tank exhaust port 632 and the second water tank intake port 641 may be the minimum distance between the first water tank exhaust port 632 and the second water tank intake port 641. As shown in Figure 6C, the distance between the first water tank exhaust port 632 and the second water tank intake port 641 may be the distance between the lower right corner of the first water tank exhaust port 632 and the upper left corner of the second water tank intake port 641.

[0463] In some embodiments, the first exhaust port of the water tank may be an outlet in the first opening direction, and the second exhaust port of the water tank may be an outlet in the second opening direction. The first and second opening directions are opposite or orthogonal to each other. As shown in Figure 6D, when the water tank 600 is placed horizontally, a spatial coordinate system is established with the center of the water tank cavity as the origin. The Z-axis may be the vertical direction of the water tank 600, the +X and -X directions may be the forward and backward directions, respectively, the +Y and -Y directions may be the right and left directions, respectively, and the +Z and -Z directions may be the upward and downward directions, respectively. The first opening direction corresponding to the first exhaust port 632 of the water tank may be the -Z direction, and the second opening direction corresponding to the second intake port 641 of the water tank may be the +X direction, and the directions of the first and second opening directions are perpendicular to each other.

[0464] In some embodiments of this disclosure, by limiting the distance or opening direction between the first exhaust port 632 and the second intake port 641 of the water tank, a short circuit in the air path between the first exhaust port 632 and the second intake port 641 of the water tank can be avoided. Therefore, the gas entering through the first exhaust port 632 of the water tank enters directly into the second intake port 641 of the water tank without mixing with the steam in the water tank cavity, thereby ensuring the humidifying effect of the gas in the water tank 600.

[0465] In some embodiments, the spatial coordinate system of the water tank 600 is constructed based on the above method, such that the distance on the Y-axis between the first intake port 631 and the first exhaust port 632 of the water tank is greater than a predetermined threshold (e.g., 6 cm), and / or the distance on the Y-axis between the second intake port 641 and the second exhaust port 642 of the water tank is greater than a predetermined threshold. Based on the above setup, even if some of the liquid flows back into the gas passage, it will not immediately flow out from the other side, which enhances the static backflow prevention effect of the water tank 600, avoids affecting the use of respiratory ventilation equipment, and prevents causing suffocation in the patient. For example, if the respiratory ventilation device is placed at an angle, even if the liquid in the water tank cavity submerges the second water tank inlet 641, the distance on the Y-axis between the second water tank inlet 641 and the second water tank exhaust port 642 is greater than a predetermined threshold. Therefore, when the respiratory ventilation device is placed at an angle, a difference in height is created between the second water tank inlet 641 and the second water tank exhaust port 642, and the liquid submerged in the second water tank inlet 641 does not immediately overflow from the second water tank exhaust port 642.

[0466] In some embodiments, the static backflow prevention effect of the water tank 600 is related to the distance between the first intake port 631 and the first exhaust port 632 of the water tank, and the distance between the second intake port 641 and the second exhaust port 642 of the water tank. Based on the above method, a spatial coordinate system for the water tank 600 is constructed, and the greater the distance in the Y-axis between the first intake port 631 and the first exhaust port 632 of the water tank, and the greater the distance in the Y-axis between the second intake port 641 and the second exhaust port 642 of the water tank, the better the static backflow prevention effect of the water tank 600. When the liquid in the water tank 600 is tilted in the Y-axis direction, the greater the distance in the Y-axis between the first intake port 631 and the first exhaust port 632 of the water tank, and the greater the distance in the Y-axis between the second intake port 641 and the second exhaust port 642 of the water tank, the less likely it is that liquid that has flowed back into the intake passage 630 from the first exhaust port 632 will flow out of the first intake port 631, and liquid that has flowed back into the exhaust passage 640 from the second intake port 641 will flow out of the second exhaust port 642, thereby improving the static backflow prevention effect of the water tank 600. Similarly, when a spatial coordinate system for the water tank 600 is constructed based on the above method, the greater the distance in the X-axis between the first intake port 631 and the first exhaust port 632 of the water tank, and the greater the distance in the X-axis between the second intake port 641 and the second exhaust port 642 of the water tank, the better the static backflow prevention effect of the water tank 600. When the liquid in the water tank 600 is tilted in the X-axis direction, the greater the distance in the X-axis between the first intake port 631 and the first exhaust port 632 of the water tank, and the greater the distance in the X-axis between the second intake port 641 and the second exhaust port 642 of the water tank, the less likely it is that liquid that has flowed back from the first exhaust port 632 into the intake passage 630 will flow out of the first intake port 631, and liquid that has flowed back from the second intake port 641 into the exhaust passage 640 will flow out of the second exhaust port 642. This improves the static backflow prevention effect of the water tank 600.

[0467] In some embodiments, the backflow prevention member may include a first bend 633 and / or a second bend 643. As shown in Figures 6D to 6G, the intake passage 630 may include the first bend 633, and the exhaust passage 640 may include the second bend 643. The first bend 633 and the second bend 643 are bent toward the center of the water tank cavity, the first water tank exhaust port 632 is provided in the first bend 633, and the second water tank intake port 641 is provided in the second bend 643. The first bend 633 and the second bend 643 may be bent at a right angle or in a circular shape. As shown in Figure 6D, the first bend 633 may be bent at a right angle, and the second bend 643 may be bent in a circular shape. When the first bend 633 and the second bend 643 are bent in a circular shape, the specific curvature may be predetermined as needed. In some embodiments, the first bend 633 and the second bend 643 are bent toward the center of the water tank cavity, with the extended ends extending beyond the center of the water tank cavity. The first bend 633 includes all the structures after the intake passage 630 has been bent, and the second bend 643 includes all the structures after the exhaust passage 640 has been bent. In some embodiments of the present disclosure, by providing the first bend 633 and the second bend 643, and providing the first water tank exhaust port 632 in the first bend 633 and the second water tank intake port 641 in the second bend 643, the first water tank exhaust port 632 and the second water tank intake port 641 can be spaced apart from the side wall of the upper water tank housing 611. In this case, when the liquid collides with the side wall inside the water tank cavity, it is prevented from splashing and flowing back into the first exhaust port 632 and / or the second inlet port 641 of the water tank, thereby improving the static and dynamic backflow prevention effect of the water tank 600, ensuring the normal operation of the respiratory ventilation equipment, and preventing suffocation of the patient. At the same time, after the airflow enters each inlet, the first bend 633 and / or the second bend 643 cause a redirection of the airflow, extending the airflow path, thereby giving the water tank 600 a good backflow prevention effect.

[0468] In some embodiments, the intake passage 630 and the exhaust passage 640 may be integrally molded. In some embodiments, the intake passage 630 and the exhaust passage 640 may be assembled. At least one side of the intake passage 630 and / or the exhaust passage 640 is removable. The removable structure may be fixed to the intake passage 630 and / or the exhaust passage 640 in various ways (e.g., by fixing screws). As shown in Figure 6H, the side of the intake passage 630 and the exhaust passage 640 closer to the liquid surface, i.e., the sealing plate 660, is removable, and the sealing plate 660 may be a common member of the intake passage 630 and the exhaust passage 640. The sealing plate 660 may be provided with a snap 661, and a projection 662 may be provided on one side of the intake passage 630. A user (e.g., a patient or healthcare worker) can engage the snap 661 with the projection 662 ...

Claims

1. A respiratory ventilation device including a main body configured to generate a high-pressure gas at a pressure higher than atmospheric pressure, The main unit includes a noise reduction device configured to reduce noise generated during the operation of the main unit, The noise reduction device includes an intake structure, a noise reduction housing, a blower cavity, and a gas passage, and the gas enters the gas passage through the intake structure. The gas passage is formed between the side wall of the noise reduction housing and the side wall of the blower cavity, and the gas passage is configured to transmit gas. The blower cavity is provided with at least one cavity intake port along the airflow direction. A respiratory ventilation device in which the gas in the gas passage enters the blower cavity through the cavity intake port.

2. The respiratory ventilation device according to claim 1, wherein the gas passage is provided so as to surround the outer wall of the blower cavity.

3. The respiratory ventilation device according to claim 1 or 2, wherein the blower cavity is provided with at least two cavity intake ports in the direction of the airflow.

4. The gas passage has three spaces in the direction along the airflow direction, The three spaces consist of large and small cavities arranged alternately with some space between them. The respiratory ventilation device according to claim 3, wherein the cavity intake port is provided in one of the three spaces having a large cavity.

5. The gas passage includes a first space, a second space, and a third space in the direction of airflow. The first space is larger than the second space, and the second space is smaller than the third space. The respiratory ventilation device according to claim 4, wherein the blower cavity includes a first intake port located in the first space and a second intake port located in the third space.

6. The intake structure is located at the starting end in the direction of extension of the gas passage, and the cavity intake port is located at the end in the direction of extension of the gas passage. The respiratory ventilation device according to any one of claims 1 to 5, wherein the angle between a first connecting wire connecting the exhaust port of the intake structure and the center of the gas passage and a second connecting wire connecting the cavity intake port and the center of the gas passage is greater than 180°.

7. The respiratory ventilation device according to claim 6, wherein the intake structure includes an intake tube having a bent structure, and the gas flows into the gas passage after being diverted within the intake tube.

8. The main body includes a blower, The blower is fixedly mounted within the noise reduction device. The respiratory ventilation device according to any one of claims 1 to 7, wherein the blower is fixedly attached to the bottom, top, or side wall of the noise reduction device by a blower mounting structure.

9. The respiratory ventilation device according to claim 8, wherein there is a gap between the outer wall of the blower and the inner wall of the noise reduction device.

10. The blower mounting structure includes a blower bottom support structure. The respiratory ventilation device according to claim 9, wherein one end of the blower bottom support structure is fixedly connected to the bottom wall of the blower, and the other end of the blower bottom support structure is fixedly connected to the bottom of the noise reduction device.

11. The aforementioned blower mounting structure includes a blower suspension structure, The respiratory ventilation device according to claim 9, wherein one end of the blower suspension structure is fixedly connected to the blower, and the other end of the blower suspension structure is fixedly connected to the top of the noise reduction device.

12. The blower mounting structure includes a blower side wall suspension structure, The respiratory ventilation device according to claim 9, wherein one end of the blower side wall suspension structure is fixedly connected to the blower, and the other end of the blower side wall suspension structure is fixedly connected to the side wall of the noise reduction device.

13. The respiratory ventilation device according to any one of claims 1 to 12, further comprising a connecting device including a ventilation pipe for receiving the high-pressure gas.

14. The respiratory ventilation device has a sealed structure configured to be used for a sealed connection between the main body and the connecting device, according to claim 13.

15. The respiratory ventilation device according to claim 14, wherein the sealing structure includes an elastic tube, the elastic tube or the ventilation tube is provided with an annular projection, and the annular projection is used for a sealed connection between the elastic tube and the ventilation tube.

16. The annular projection is provided on the inner wall of the elastic pipe or the outer wall of the ventilation pipe so that the ventilation pipe can enter the elastic pipe. The respiratory ventilation device according to claim 15, wherein the annular projection is provided on the inner wall of the ventilation pipe or the outer wall of the elastic pipe so that the elastic pipe can enter the ventilation pipe.

17. A chamfer is provided at the connection portion between the ventilation pipe and the elastic pipe. The respiratory ventilation device according to any one of claims 15 to 16, wherein the connection portion between the ventilation pipe and the elastic pipe has a diameter that gradually decreases.

18. A respiratory ventilation device according to any one of claims 15 to 17, wherein a limit groove is provided in the outer wall of the elastic tube or the outer wall of the ventilation tube, the main body includes a limit structure, the limit structure is coupled to the limit groove, and the limit structure is used in cooperation with the limit groove to limit the radial range of movement of the elastic tube or the ventilation tube.

19. The respiratory ventilation device according to any one of claims 14 to 18, wherein the connecting device includes a water tank or a cover plate without a water tank.

20. The aforementioned water tank is A water tank housing including an upper water tank housing and a lower water tank housing, and including a water tank cavity for containing liquid, A heat transfer member provided in the lower housing of the water tank, which transfers heat to vaporize the liquid in the water tank cavity, An intake passage provided in the upper housing of the water tank for introducing the gas from outside the water tank into the water tank cavity, the intake passage including a first water tank intake port for the gas to enter the intake passage from outside the water tank, and a first water tank exhaust port for the gas in the intake passage to enter the water tank cavity, The respiratory ventilation device according to claim 19, comprising an exhaust passage provided in the upper housing of the water tank for discharging the gas from the water tank cavity, the exhaust passage including a second water tank intake port for the gas in the water tank cavity to enter the exhaust passage, and a second water tank exhaust port for the gas to be discharged from the exhaust passage.

21. The respiratory ventilation device according to claim 20, wherein the water tank further includes a backflow prevention member that prevents the liquid in the water tank cavity from flowing back into at least one of the intake passage or the exhaust passage.

22. The backflow prevention member includes one or both of the first bend in the intake passage and the second bend in the exhaust passage, and / or a flow guide rib, the first bend and the second bend are bent toward the center of the water tank cavity, the first exhaust port of the water tank is provided in the first bend, the second intake port of the water tank is provided in the second bend, and the flow guide rib is provided between the first exhaust port of the water tank and the side wall of the upper housing adjacent to the first exhaust port of the water tank, and / or between the second intake port of the water tank and the side wall of the upper housing adjacent to the second exhaust port of the water tank, according to claim 21.

23. The flow guiding rib includes a first flow guiding rib and a second flow guiding rib, When the flow guide rib is provided between the first exhaust port of the water tank and the side wall of the upper housing adjacent to the first exhaust port of the water tank, the distance between the first flow guide rib and the first exhaust port of the water tank is greater than the distance between the second flow guide rib and the first exhaust port of the water tank, and / or The respiratory ventilation device according to claim 22, wherein when the flow guide rib is provided between the second air intake port of the water tank and the side wall of the upper housing of the water tank adjacent to the second air intake port of the water tank, the distance between the first flow guide rib and the second air intake port of the water tank is greater than the distance between the second flow guide rib and the second air intake port of the water tank.

24. The respiratory ventilation device according to any one of claims 20 to 23, wherein the water tank further includes a push button provided on the outer surface of the water tank housing, and the push button is pressed by an external force in a direction toward the interior of the water tank housing, thereby enabling the water tank to be attached to and detached from the main body.

25. The aforementioned push button includes an elastic structure, The aforementioned elastic structure is When the push button is pressed in a direction toward the inside of the water tank housing, it undergoes elastic deformation, The respiratory ventilation device according to claim 24, wherein when the external force is released, it deforms to restore its shape and drives the push button to rebound and return away from the inside of the water tank housing, thereby fixing the water tank to the main body of the respiratory ventilation device or returning it to its original position after removal.

26. The respiratory ventilation device according to claim 25, wherein the push button further includes a connecting structure provided at one end of the push button closest to the main body, the connecting structure being detachably connected to the main body, and the connecting structure separating from the main body when the push button is pressed toward the interior of the water tank housing.

27. The respiratory ventilation device according to any one of claims 20 to 26, wherein the water tank further comprises a heating device configured to heat the liquid in the water tank.

28. The respiratory ventilation device according to claim 27, wherein the heating device is detachably attached to the lower end of the water tank.

29. The lower end of the water tank is open, The respiratory ventilation device according to claim 28, wherein when the heating device is attached to the lower end of the water tank, the heating device becomes the bottom wall of the water tank.

30. An elastic sealing member is provided at the connection point between the water tank and the heating device to seal the water tank and the heating device. The respiratory ventilation device according to claim 29, wherein the elastic sealing member is fixedly connected to at least one of the water tank or the heating device.

31. The noise reduction device includes a porous sound-absorbing plate configured to improve the noise reduction effect of the noise reduction device, the porous sound-absorbing plate having through holes along the thickness direction, The aforementioned porous sound-absorbing plate is The first surface that comes into contact with the airflow, A second surface that is separated from the airflow, The through holes of the porous sound-absorbing plate communicate with the first surface and the second surface. The respiratory ventilation device according to any one of claims 1 to 30, wherein the through-holes include a first type through-hole and a second type through-hole, and the diameter of the first type through-hole is smaller than the diameter of the second type through-hole.

32. The aforementioned through hole is The first opening on the first surface, The second opening on the second surface, The first opening and the second opening are connected by through-hole side walls, The respiratory ventilation device according to claim 31, wherein the diameter of the first opening is less than or equal to the diameter of the second opening.

33. The respiratory ventilation device according to any one of claims 1 to 32, further comprising a liquid level detection device for detecting the liquid level of the humidifier of the respiratory ventilation device.

34. The respiratory ventilation device according to claim 33, wherein the liquid level detection device includes at least one sensor used to detect the liquid level of the humidifier.

35. The respiratory ventilation device according to claim 34, wherein the sensor is installed on the side wall of the main body of the respiratory ventilation device, on the side away from the humidifier side wall, or on the side of the main body of the respiratory ventilation device, on the side facing the humidifier side wall, and the main body side wall is adjacent to the humidifier side wall.

36. The respiratory ventilation device according to any one of claims 1 to 35, further comprising a flow detection device configured to detect the flow rate of the airflow output from the respiratory ventilation device.

37. The flow detection device includes a low-pressure detection point and a high-pressure detection point. The respiratory ventilation device according to claim 36, wherein the low-pressure detection point and the high-pressure detection point are each connected to two flow sensors to detect the different atmospheric pressures when the gas in the gas passage flows through the low-pressure detection point and the high-pressure detection point.

38. It further includes a piping fitting that communicates with an external device, The outside air is pressurized by the main body and sent to the external device via the piping joint. The respiratory ventilation device according to any one of claims 1 to 37, wherein the pipe fitting is provided with a temperature detection device used to detect the temperature of the gas in the pipe fitting.

39. The respiratory ventilation device further includes a main unit button provided on the main unit housing, The respiratory ventilation device according to any one of claims 1 to 38, wherein the main unit buttons include function buttons configured for use by a user to operate the respiratory ventilation device.

40. The respiratory ventilation device according to claim 39, wherein the main body button includes a silicone layer, a metal bracket, and a button panel attached to the main body housing in order from bottom to top.

41. The aforementioned main unit button is It includes at least two button function parts, the two adjacent ends of the button function parts facing each other, an elongated slot provided between the two adjacent ends, and the two adjacent ends are connected to a button body that penetrates the pressed side of the main body button, A button connection portion having lower rigidity than the button function portion and connected to the two adjacent ends, respectively, across the elongated slot, and the respiratory ventilation device according to claim 40.

42. A noise reduction device comprising an intake structure, a noise reduction housing, a blower cavity, and a gas passage, wherein the gas passage is located between the inner wall of the noise reduction housing and the outer wall of the blower cavity, the gas passage is configured to transmit airflow, the blower cavity is provided with at least two cavity intake ports along the airflow direction, and gas enters the gas passage through the intake structure and then enters the blower cavity through the cavity intake ports.

43. The noise reduction device according to claim 42, wherein the gas passage includes three spaces in which large cavities and small cavities are alternately arranged at intervals in the direction along the airflow direction, and the cavity intake port is provided in one of the three spaces having a large cavity.

44. The noise reduction device according to claim 43, wherein the gas passage includes a first space, a second space, and a third space in the airflow direction, the first space being larger than the second space, the second space being smaller than the third space, and the blower cavity includes a first air intake and a second air intake, the first air intake being located in the first space, and the second air intake being located in the third space.

45. The noise reduction device according to claim 44, wherein the gas passage further includes a fourth space and a fifth space in the airflow direction, the fourth space being smaller than the third space and the fifth space being larger than the fourth space, and the blower cavity further includes a third intake port located in the fifth space.

46. The noise reduction device according to any one of claims 42 to 45, wherein the intake structure includes an intake pipe, and the intake pipe is provided with one or more partition members inside in order to divide the intake pipe into two or more intake sub-pipes.

47. The noise reduction device according to claim 46, wherein the one or more partition members have a "grid-like" shape so as to divide the intake pipe into nine intake sub-pipes.

48. The intake structure includes an intake pipe, The noise reduction device according to any one of claims 42 to 47, wherein the angle between the center line of the intake pipe and the outer wall of the blower cavity is less than 90°.

49. The noise reduction device according to any one of claims 42 to 48, wherein the vertical position height of the cavity air intake is close to the motor section of the blower in the blower cavity, and the blower is cooled after the airflow enters the blower cavity through the cavity air intake.

50. A porous sound-absorbing plate and / or sound-absorbing cotton is provided in the gas passage. The noise reduction device according to any one of claims 42 to 49, wherein the porous sound-absorbing plate has a plurality of sound-absorbing holes in the thickness direction.

51. The noise reduction device according to claim 50, wherein the porous sound-absorbing plate includes a plurality of regions, and the diameter of the plurality of sound-absorbing holes in each of the plurality of regions is set according to a predetermined rule.

52. The aforementioned porous sound-absorbing plate includes a porous top plate, porous side plates, and a porous bottom plate. The porous sound-absorbing plate has the plurality of sound-absorbing holes formed in the thickness direction, The noise reduction device according to claim 51, wherein the diameters of the plurality of sound-absorbing holes in the perforated top plate, the perforated side plate and / or the perforated bottom plate are set according to the predetermined rules.

53. The noise reduction device according to claim 50, wherein the sound-absorbing cotton is non-porous sound-absorbing cotton.

54. The noise reduction device according to any one of claims 42 to 53, wherein the vertical position height of the exhaust port of the intake structure is smaller than the vertical position height of the intake port.

55. A respiratory ventilation device including a noise reduction device according to any one of claims 42 to 54.

56. It includes a noise reduction housing, an intake structure, a blower cavity, and a gas passage. The gas enters the gas passage through the exhaust port of the intake structure, the gas passage is provided between the inner wall of the noise reduction housing and the outer wall of the blower cavity, the gas passage is provided along the outer wall of the blower cavity, a cavity intake port is provided in the blower cavity, and the gas in the gas passage enters the blower cavity through the cavity intake port. A noise reduction device wherein the intake structure is located at the starting end in the extending direction of the gas passage, the cavity intake port is located at the end in the extending direction of the gas passage, and the angle between a first connecting line connecting the exhaust port of the intake structure and the center of the gas passage and a second connecting line connecting the cavity intake port and the center of the gas passage is greater than 180 degrees.

57. The noise reduction device according to claim 56, wherein the intake structure includes an intake pipe having a bent structure, and the gas flows into the gas passage after being redirected within the intake pipe.

58. The noise reduction device according to claim 57, wherein the first airflow direction of the intake port of the intake pipe is different from the second airflow direction of the exhaust port of the intake passage.

59. The noise reduction device according to claim 58, wherein the bending structure positions the intake port and the exhaust port of the intake pipe at different heights.

60. The noise reduction device according to claim 59, wherein the bending structure includes an upward bend such that the exhaust port of the intake pipe is higher than the intake port of the intake pipe, the first airflow direction is horizontal, and the second airflow direction is vertical.

61. The noise reduction device according to claim 60, wherein the intake pipe includes a horizontal section and a vertical section, and the overall height of the vertical section is 2 to 2.8 times the diameter of the horizontal section.

62. The noise reduction device according to any one of claims 56 to 61, wherein the vertical position and height of the cavity intake port is close to the motor section of the blower inside the blower cavity, and after the airflow enters the blower cavity through the cavity intake port, it cools the blower inside the blower cavity.

63. The noise reduction housing further includes a water collection cavity, The noise reduction device according to any one of claims 56 to 61, wherein the blower cavity further includes a cavity exhaust port communicating with the water collection cavity.

64. The noise reduction device according to claim 63, wherein the noise reduction housing is provided with a main outlet, and the gas flows out from the cavity exhaust port, enters the water collection cavity, is lifted up, and then flows out from the main outlet.

65. The noise reduction device according to claim 64, wherein the vertical position height of the cavity exhaust port is higher than the bottom surface of the water collection cavity.

66. A porous sound-absorbing plate and / or sound-absorbing cotton is placed inside the gas passage. The noise reduction device according to any one of claims 56 to 61, wherein the porous sound-absorbing plate has a plurality of sound-absorbing holes in the thickness direction.

67. The noise reduction device according to claim 66, wherein the porous sound-absorbing plate includes a plurality of regions, and the diameters of the plurality of suction holes in each of the plurality of regions are set according to a predetermined rule.

68. The noise reduction device according to claim 67, wherein the porous sound-absorbing plate includes a porous top plate, porous side plates, and a porous bottom plate, the porous sound-absorbing plate is provided with the plurality of suction holes in the thickness direction, and the diameter of the sound-absorbing holes in the porous top plate, the porous side plates and / or the porous bottom plate is set according to the predetermined rules.

69. The noise reduction device according to claim 66, wherein the sound-absorbing cotton is non-porous sound-absorbing cotton.

70. A respiratory ventilation device including a noise reduction device according to any one of claims 56 to 69.

71. The first surface in contact with the airflow, The second surface that is separated from the aforementioned airflow, A porous sound-absorbing plate comprising through holes that connect the first surface and the second surface in the thickness direction of the porous sound-absorbing plate, wherein the through holes include a first type of through hole and a second type of through hole, and the diameter of the first type of through hole is smaller than the diameter of the second type of through hole.

72. The aforementioned through hole is The first opening on the first surface and The second opening on the second surface, The through-hole side wall connects the first opening and the second opening. The porous sound-absorbing plate according to claim 71, wherein the diameter of the first opening is less than or equal to the diameter of the second opening.

73. The porous sound-absorbing plate according to claim 71, wherein the diameter of the through-hole is smaller than the thickness of the porous sound-absorbing plate.

74. The porous sound-absorbing plate according to claim 72, wherein the side walls of the through holes exhibit a predetermined shape in the cross-section of the porous sound-absorbing plate in the thickness direction.

75. The porous sound-absorbing plate according to claim 74, wherein the predetermined shape includes straight lines, curves, or combinations thereof.

76. The porous sound-absorbing plate is A first porous sound-absorbing plate provided along the first plane, The present invention further includes a second porous sound-absorbing plate installed at a predetermined angle with the first plane, The porous sound-absorbing plate according to any one of claims 71 to 75, wherein the through holes of the first porous sound-absorbing plate are of the first type, and the through holes of the second porous sound-absorbing plate are of the second type.

77. The porous sound-absorbing plate further includes a dividing member and a guide member, As the airflow flows through the dividing member, the airflow flows simultaneously over the two partition member surfaces of the dividing member. The porous sound-absorbing plate according to claim 76, wherein when the airflow flows through the guide member, the airflow flows sequentially over the surfaces of the two partition members of the guide member.

78. The dividing member includes at least one first partition member installed on the first surface, The angle between the installation direction of the at least one first partition member and the airflow direction satisfies the first threshold condition, and the at least one first partition member is installed at the inlet end of the airflow. The porous sound-absorbing plate according to claim 77, wherein when the airflow flows through the first partition member, the airflow flows simultaneously through two partition member surfaces of the first partition member, thereby forming at least two gas passages and reducing the cross-sectional area of ​​the airflow in the gas passages.

79. The guide member includes a second partition member installed on the first surface, The angle between the installation direction of the second partition member and the airflow direction satisfies the first threshold condition, and the end of the second partition member is installed facing the inlet end of the airflow. The porous sound-absorbing plate according to claim 77, wherein when the airflow flows through the second partition member, the airflow flows along the first surface of the second partition member, and when it reaches the end of the second partition member, it changes direction and flows along the second surface of the second partition member.

80. The guide member further includes a group of third partition members installed on the first surface, The angle between the installation direction of the third partition member group and the airflow direction satisfies the second threshold condition. The group of third partition members includes at least one high-position third partition member and at least one low-position third partition member, wherein the high-position third partition member is installed adjacent to the low-position third partition member, alternating in height. The porous sound-absorbing plate according to claim 77, wherein when the airflow flows sequentially over the adjacent high-position third partition member and the low-position third partition member, the airflow flows along the first surface of the high-position third partition member, and when it reaches the end of the high-position third partition member, the airflow enters an airflow passage formed by the second surface of the high-position third partition member and the first surface of the low-position third partition member, and the airflow flows out from the end of the low-position third partition member along the second surface of the low-position third partition member.

81. The porous sound-absorbing plate is At least one porous sound-absorbing plate bend, The present invention further includes a group of fourth partition members provided on the bend of the porous sound-absorbing plate, wherein the angle between the installation direction and the airflow direction satisfies a second threshold condition, The fourth partition member group includes at least one first side partition member and at least one second side partition member, wherein the first side partition member is installed on one side of the bend of the porous sound-absorbing plate of the fourth partition member group, the second side partition member is installed on the other side of the bend of the porous sound-absorbing plate, the first side partition members are installed alternately adjacent to the second side partition member in the direction of installation of the second porous sound-absorbing plate, and the first side partition member and the second side partition member adjacent to the first side partition member have alternating portions in the direction of installation of the second porous sound-absorbing plate. The porous sound-absorbing plate according to claim 79, wherein when the airflow flows sequentially through the first partition member and the second partition member, the airflow flows along the first surface of the first partition member, turns when it reaches the end of the first partition member, enters the airflow passage formed in the alternating portion, reaches the first surface of the second partition member and flows out.

82. The second porous sound-absorbing plate further includes a fifth partition member installed in the alternating portion, The angle between the installation direction of the fifth partition member and the airflow direction satisfies the first threshold condition. The porous sound-absorbing plate according to claim 81, wherein when the airflow flows through the alternating portions between the adjacent first and second partition members, the airflow flows simultaneously through the two partition member surfaces of the fifth partition member, thereby forming at least two airflow paths that guide and organize the airflow.

83. A respiratory ventilation device comprising a porous sound-absorbing plate according to any one of claims 71 to 82.

84. A main unit that generates high-pressure gas at a pressure higher than atmospheric pressure, A connecting device including a ventilation pipe for receiving the aforementioned high-pressure gas, A respiratory ventilation device comprising a sealing structure configured for use in a sealed connection between the main body and the connecting device, wherein the sealing structure includes an elastic tube, and the elastic tube or the ventilation tube is provided with an annular projection used for the sealed connection between the elastic tube and the ventilation tube.

85. The annular projection is provided on the inner wall of the elastic pipe or the outer wall of the ventilation pipe so that the ventilation pipe can enter the elastic pipe. The respiratory ventilation device according to claim 84, wherein the annular projection is provided on the inner wall of the ventilation pipe or the outer wall of the elastic pipe so that the elastic pipe can enter the ventilation pipe.

86. A chamfer is provided at the connection portion between the ventilation pipe and the elastic pipe. The respiratory ventilation device according to any one of claims 84 to 85, wherein the connection portion between the ventilation pipe and the elastic pipe has a diameter that gradually decreases.

87. A respiratory ventilation device according to any one of claims 84 to 86, wherein a limit groove is provided on the outer wall of the elastic tube or the outer wall of the ventilation tube, the main body includes a limit structure, the limit structure is coupled to the limit groove, and the limit structure cooperates with the limit groove to restrict the radial range of movement of the elastic tube or the ventilation tube.

88. The limit groove is provided on the outer wall of the elastic tube, the ventilation tube can enter the elastic tube, and the limit groove is used to limit the range of movement of the elastic tube in the radial direction. The respiratory ventilation device according to claim 87, wherein the limit groove is provided on the outer wall of the ventilation pipe, the elastic pipe can enter the ventilation pipe, and the limit groove is used to limit the range of movement of the ventilation pipe in the radial direction.

89. The respiratory ventilation device according to claim 88, wherein the limit groove includes one or more limit protrusions, the one or more limit protrusions are distributed circumferentially along the outer wall of the limit groove, and the distance between the outer wall of the one or more limit protrusions and the central axis of the limit groove is greater than or equal to the inner diameter of the limit structure.

90. The respiratory ventilation device according to any one of claims 84 to 89, wherein the connecting device includes a water tank or a cover plate without a water tank.

91. The respiratory ventilation device according to claim 90, wherein the guide rib is provided on the outer wall of the ventilation pipe of the cover plate without a water tank.

92. The respiratory ventilation device according to claim 91, wherein the ventilation pipe includes an exhaust pipe and an intake pipe, and a flow-limiting structure for adjusting the air resistance between the exhaust pipe and the intake pipe is provided between the intake pipe and the exhaust pipe of the cover plate without a water tank.

93. The respiratory ventilation device according to any one of claims 84 to 92, wherein the annular projection protrudes in a direction away from the insertion direction of the elastic tube and the ventilation tube.

94. A water tank housing including an upper water tank housing, a lower water tank housing, and a water tank cavity for containing liquid, A heat transfer member provided in the lower housing of the water tank, which transports heat to the liquid in the water tank cavity and vaporizes the liquid in the water tank cavity, An intake passage provided in the upper housing of the water tank for introducing gas into the water tank cavity, the intake passage includes a first water tank intake port for the gas outside the water tank to enter the intake passage, and a first water tank exhaust port for the gas in the intake passage to enter the water tank cavity, An exhaust passage provided in the upper housing of the water tank for discharging the gas from the water tank cavity, the exhaust passage including a second water tank intake port for the gas in the water tank cavity to enter the exhaust passage, and a second water tank exhaust port for the gas to be discharged from the exhaust passage, A water tank comprising a backflow prevention member for preventing the liquid in the water tank cavity from flowing back into the intake passage and / or exhaust passage.

95. The backflow prevention member includes one or both of the first bend in the intake passage and the second bend in the exhaust passage, and / or a flow guide rib. The water tank according to claim 94, wherein the first and second bends are bent toward the center of the water tank cavity, the first exhaust port of the water tank is provided in the first bend, the second intake port of the water tank is provided in the second bend, and the flow guide rib is provided between the first exhaust port of the water tank and the side wall of the upper housing adjacent to the first exhaust port of the water tank, and / or between the second intake port of the water tank and the side wall of the upper housing adjacent to the second intake port of the water tank.

96. The flow guiding rib includes a first flow guiding rib and a second flow guiding rib, When the flow guide rib is provided between the first exhaust port of the water tank and the side wall of the upper housing adjacent to the first exhaust port of the water tank, the distance between the first flow guide rib and the first exhaust port of the water tank is greater than the distance between the second flow guide rib and the first exhaust port of the water tank, and / or The water tank according to claim 95, wherein, when the flow guide rib is provided between the second air intake port of the water tank and the side wall of the upper housing of the water tank adjacent to the second air intake port of the water tank, the distance between the first flow guide rib and the second air intake port of the water tank is greater than the distance between the second flow guide rib and the second air intake port of the water tank.

97. The water tank according to claim 96, wherein the length of the first flow guide rib in the vertical direction of the housing is smaller than the length of the second flow guide rib in the vertical direction of the housing.

98. The second flow guide rib includes a third bend at one end away from the inside of the upper housing of the water tank, When the flow guide rib is provided between the first exhaust port of the water tank and the side wall of the upper housing of the water tank adjacent to the first exhaust port of the water tank, the third bent portion is bent toward the first exhaust port of the water tank and / or The water tank according to claim 96, wherein the flow guide rib is provided between the second air intake of the water tank and the side wall of the upper housing of the water tank adjacent to the second air intake of the water tank, and the third bent portion is bent toward the second air intake of the water tank.

99. If the water tank is in a normal position, When the flow guide rib is provided between the first exhaust port of the water tank and the side wall of the upper housing of the water tank adjacent to the first exhaust port of the water tank, the minimum distance between the second flow guide rib and the liquid surface in the water tank cavity is smaller than the minimum distance between the first exhaust port of the water tank and the liquid surface in the water tank cavity, and / or The water tank according to any one of claims 96 to 98, wherein the flow guide rib is provided between the second air intake of the water tank and the side wall of the upper housing of the water tank adjacent to the second air intake of the water tank, and the minimum distance between the second flow guide rib and the liquid surface in the water tank cavity is smaller than the minimum distance between the second air intake of the water tank and the liquid surface in the water tank cavity.

100. The water tank according to any one of claims 94 to 99, wherein the distance between the first exhaust port and / or the second intake port of the water tank and the center of the water tank cavity is less than a predetermined distance threshold.

101. The water tank according to any one of claims 94 to 100, wherein the first exhaust port of the water tank is an exhaust port in a first opening direction, the second exhaust port of the water tank is an exhaust port in a second opening direction, and the first opening direction is opposite to or perpendicular to the second opening direction.

102. The water tank according to any one of claims 94 to 100, wherein at least one side of the intake passage and / or exhaust passage is removable.

103. A respiratory ventilation device comprising a main body and a water tank according to any one of claims 94 to 102.

104. It includes a water tank housing and a push button provided on the outer surface of the water tank housing, The aforementioned push button is pressed by an external force in a direction toward the interior of the water tank housing, thereby enabling the water tank to be attached to and detached from the main body. The aforementioned push button includes an elastic structure, The aforementioned elastic structure is When the push button is pressed in a direction toward the inside of the water tank housing, it undergoes elastic deformation, A water tank configured to return to its original shape when the external force is released, thereby driving the push button to rebound and return away from the inside of the water tank housing, and to return to its original shape after being fixed to or removed from the body of the respiratory ventilation device.

105. The push button further includes a connection structure provided at one end of the push button closest to the main body and detachably connected to the main body, The water tank according to claim 104, wherein when the push button is pressed in a direction toward the interior of the water tank housing, the connecting structure separates from the main body.

106. The elastic structure includes at least one of an elastic arm and an elastic member, The elastic arm has a free end and a fixed end, and when the push button is pressed in a direction toward the inside of the water tank housing, the free end slides toward the fixed end, and the elastic arm elastically deforms. When the external force is released, the free end slides toward the fixed end, and the elastic arm is configured to undergo a restorative deformation. The water tank according to any one of claims 104 to 105, wherein the elastic member is configured to undergo elastic deformation, with its height decreasing when the push button is pressed in a direction approaching the inside of the water tank housing, and to undergo restorative deformation, with its height increasing when the external force is released.

107. The water tank according to claim 106, wherein the fixed end of the elastic arm is fixedly connected to either the side of the push button closer to the inside of the water tank housing or the outer surface of the water tank housing, and the free end of the elastic arm is pressed against the other of the side of the push button closer to the inside of the water tank housing and the outer surface of the water tank housing, and when the push button is pushed in a direction closer to the inside of the water tank housing or when the external force is released, the free end slides against the other of the side of the push button closer to the inside of the water tank housing and the outer surface of the water tank housing.

108. The elastic arm includes at least one first elastic arm and / or at least one second elastic arm, The first fixed end of the first elastic arm is fixed to the side of the push button closer to the inside of the water tank housing, and the first free end of the first elastic arm is in contact with the outer surface of the water tank housing and slides against the upper surface of the water tank housing when the push button is pushed in a direction toward the inside of the water tank housing or when the external force is released. The water tank according to claim 107, wherein the second fixed end of the second elastic arm is fixed to the outer surface of the water tank housing, the second free end of the second elastic arm is pressed against the side of the push button closer to the inside of the water tank housing, and when the push button is pushed in a direction toward the inside of the water tank housing or when the external force is released, the second free end slides against the side of the push button closer to the inside of the water tank housing.

109. The water tank according to claim 106, wherein one end of the elastic member is fixedly connected to either the side of the push button closer to the inside of the water tank housing or the outer surface of the water tank housing, and the other end of the elastic member abuts against the other side of the push button closer to the inside of the water tank housing or the outer surface of the water tank housing.

110. The water tank according to claim 109, wherein a connecting projection is provided on the side of the push button closest to the inside of the water tank housing or on the outer surface of the water tank housing, and the connecting projection is connected to the elastic member.

111. At least one of a limit structure and a guide structure is further provided between the push button and the outer surface of the water tank housing. The limit structure is configured to restrict the range of movement of the push button in the direction away from the inside of the water tank housing. The water tank according to any one of claims 104 to 110, wherein the guide structure is configured to guide the movement of the push button along a predetermined path.

112. The water tank according to claim 111, wherein the limit structure includes a limit member and a limit groove, the limit member is provided on one of the outer surface of the water tank housing and the side of the push button closer to the inside of the water tank housing, the limit groove is provided on the other of the outer surface of the water tank housing and the side of the push button closer to the inside of the water tank housing, the limit member is provided in the limit groove and is movable in a direction toward and / or toward the inside of the water tank housing within the limit groove.

113. The water tank according to claim 111, wherein the guide structure includes a guide member and a guide groove, the guide member is provided on either the outer surface of the water tank housing or the side of the push button closer to the inside of the water tank housing, the guide groove is provided on the outer surface of the water tank housing or the side of the push button closer to the inside of the water tank housing, and the guide member is movable within the guide groove in a direction toward and / or toward the inside of the water tank housing.

114. The water tank according to any one of claims 104 to 113, wherein the outer surface of the water tank housing includes a recessed structure, the push button is housed within the recessed structure, and the elastic structure is provided between the side of the push button closer to the inside of the water tank housing and the bottom of the recessed structure.

115. A respiratory ventilation device including a water tank according to any one of claims 104 to 114.

116. A liquid level detection device configured for use in detecting the liquid level of a humidifier in a respiratory ventilation device, It includes at least one sensor configured to detect the liquid level of the humidifier, The sensor is installed on the side wall of the main body of the respiratory ventilation device, on the side away from or facing the side wall of the humidifier, and the main body side wall is adjacent to the side wall of the humidifier.

117. The liquid level detection device according to claim 116, wherein the sensor is in the form of a sheet.

118. The liquid level detection device according to claim 117, wherein the material of the sensor includes a metallic material, and the sensor is a separate metal sheet or a metal sheet attached to a carrier.

119. The liquid level detection device according to claim 118, wherein the carrier includes at least one of a printed circuit board (PCB) and a flexible circuit board.

120. The length range of the aforementioned sensor is 30 mm to 60 mm. The width range of the sensor is 2 mm to 5 mm, and / or The liquid level detection device according to claim 117, wherein the thickness range of the sensor is at least one of 0.05 mm to 0.5 mm.

121. The liquid level detection device according to any one of claims 116 to 120, wherein the difference between the first position height of the sensor and the second position height of the bottom plate of the humidifier is 2 mm to 50 mm.

122. A liquid level detection device according to any one of claims 116 to 121, wherein there are multiple sensors, each of which is installed at a predetermined position height in the vertical direction.

123. The liquid level detection device according to any one of claims 116 to 122, wherein when the sensor is installed on the side wall of the main body away from the side wall of the humidifier, the horizontal distance between the sensor and the inner wall of the side wall of the humidifier is in the range of 1 mm to 8 mm.

124. The aforementioned sensor includes a capacitance sensor, The liquid level detection device further includes a main control chip connected to the sensor circuit, The liquid level detection device according to any one of claims 116 to 123, wherein the main control chip is configured to receive capacitance values ​​collected by the sensor and to determine whether the liquid level is lower than the vertical position height of the sensor based on the capacitance values.

125. A respiratory ventilation device including a liquid level detection device according to any one of claims 116 to 124.

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