Auxiliary coughing sputum device and valve for auxiliary coughing sputum device

Abstract

An assisted cough device and a valve for an assisted cough device are provided. The assisted cough device comprises a blower comprising a blower inlet and a blower outlet, a patient interface, and a valve comprising a valve seat having a cavity structure, a first valve element linearly translatable, and a second valve element linearly translatable, wherein the first valve element is linearly translatable relative to the valve seat from a first position by a first displacement (S1) to a second position, the second valve element is linearly translatable relative to the valve seat from a third position by a second displacement (S2) to a fourth position, the valve causes the patient interface and the blower inlet to be in gas communication when the first valve element is in the first position and the second valve element is in the fourth position, the assisted cough device generates a negative pressure at the patient interface, the valve causes the patient interface and the blower outlet to be in gas communication when the first valve element is in the second position and the second valve element is in the third position, the assisted cough device generates a positive pressure at the patient interface.

Description

Technical Field

[0001] This application relates to the field of mechanical airway clearance technology, and more particularly to an auxiliary expectoration device and a valve for the auxiliary expectoration device. Background Technology

[0002] The human body possesses the ability to actively clear airways under physiological conditions. However, when the airway barrier, mucus clearance system, and active coughing ability are impaired due to disease or other factors, the use of mechanical airway clearance devices to remove airway secretions becomes particularly important. One known mechanical airway clearance device is the mechanical in-and-out (MIE) device, a typical application of which is cough assistance. The principle is to first provide positive pressure to the patient's airway and then suddenly switch to negative pressure. This positive and negative pressure creates a higher expiratory flow rate within the airway, simulating a cough to help the patient clear airway secretions. Sometimes, pressure oscillations can also be superimposed within the patient's airway to loosen the secretions.

[0003] Some existing MIE devices separate positive and negative pressure air paths, for example, using one pressure source to provide positive pressure and another to provide negative pressure. This not only increases the cost, size, and weight of the equipment, but also has a very negative impact on the difficulty and effectiveness of airflow control, resulting in poor controllability.

[0004] Some existing MIE devices use only one pressure source to generate both positive and negative pressure, which significantly reduces the size of the device. The switching between positive and negative pressure in these devices is generally achieved through a valve. To enhance the assisted expectoration effect, these MIE devices must be able to switch quickly to reverse the airflow. Furthermore, better controllability, faster response speed, smaller size, simpler structure, and better sealing are also design goals for MIE devices. However, due to conflicting characteristics, existing MIE devices are generally compromises on these characteristics. For example, to prevent valve leakage, the valve needs to have good sealing performance, but this usually increases friction within the valve, thus reducing the valve switching speed. Another example is that to quickly switch between positive and negative output pressure, the valve orifice needs to be as large as possible, but this usually leads to an increased valve volume and a longer airway, thus reducing the valve's response and switching speed.

[0005] There is currently no MIE device that can comprehensively solve the above-mentioned technical problems, which is also one of the technical challenges in the development of MIE technology. Summary of the Invention

[0006] A brief overview of this application is provided below to offer a basic understanding of certain aspects thereof. It should be understood that this section is not intended to identify key or essential parts of this application, nor is it intended to limit its scope. Its purpose is merely to present certain concepts in a simplified form. Further details will be explained in other parts of this application.

[0007] To address the aforementioned technical problems, this application provides an auxiliary expectoration device, comprising: a fan, including a fan inlet and a fan outlet; a patient interface; and a valve, including a valve seat with a cavity structure, a first valve element capable of linear translation, and a second valve element capable of linear translation. The first valve element can be linearly translated relative to the valve seat from a first position by a first displacement (S1) to a second position, and the second valve element can be linearly translated relative to the valve seat from a third position by a second displacement (S2) to a fourth position. When the first valve element is in the first position and the second valve element is in the fourth position, the valve connects the patient interface to the fan inlet air passage, and the auxiliary expectoration device generates negative pressure at the patient interface. When the first valve element is in the second position and the second valve element is in the third position, the valve connects the patient interface to the fan outlet air passage, and the auxiliary expectoration device generates positive pressure at the patient interface.

[0008] In some embodiments, the first valve element and the second valve element are mechanically separated and isolated.

[0009] In some embodiments, the assisted expectoration device further includes: a first linear drive device configured to drive the first valve element to translate linearly; and a second linear drive device configured to drive the second valve element to translate linearly.

[0010] In some embodiments, the assisted coughing device further includes: a first additional force application module, which can apply a first additional force to the first valve element in a direction of linear translation of the first valve element that is monotonic with the position of the first valve element; and / or a second additional force application module, which can apply a second additional force to the second valve element in a direction of linear translation of the second valve element that is monotonic with the position of the second valve element.

[0011] In some embodiments, wherein: when the first valve element reciprocates linearly at the first position, the second position, or a position between the first and second positions with a first amplitude less than the first displacement (S1), the auxiliary expectoration device superimposed oscillations on the airflow at the patient interface; and / or when the second valve element reciprocates linearly at the third position, the fourth position, or a position between the third and fourth positions with a second amplitude less than the second displacement (S2), the auxiliary expectoration device superimposed oscillations on the airflow at the patient interface.

[0012] In some embodiments, wherein: the wall of the valve seat restricts the first position, the second position, the third position, and the fourth position; the moving direction of the first valve element and the moving direction of the second valve element are parallel and not collinear; the first displacement (S1) and the second displacement (S2) are both not less than 3 mm; and / or the first displacement (S1) and the second displacement (S2) are equal.

[0013] In some embodiments, the valve seat includes: a first main chamber including an air outlet (E) connected to the fan inlet, a first opening (A), and a second opening (B); and a second main chamber including an air inlet (F) connected to the fan outlet, a third opening (C), and a fourth opening (D).

[0014] In some embodiments, wherein: the first valve element includes a first valve member and a second valve member, the first valve member facing the first opening and the second valve member facing the second opening; and the second valve element includes a third valve member and a fourth valve member, the third valve member facing the third opening and the fourth valve member facing the fourth opening.

[0015] In some embodiments, the valve component is plate-shaped, wherein: the first valve component and the second valve component are spaced apart in the direction of movement of the first valve element; and the third valve component and the fourth valve component are spaced apart in the direction of movement of the second valve element.

[0016] In some embodiments, the valve component includes: a support portion; and an elastic sealing portion fixed to the support portion.

[0017] In some embodiments, wherein: the first valve component and the second valve component are both outside the first main chamber, and the third valve component and the fourth valve component are both outside the second main chamber; the first valve component and the second valve component are both outside the first main chamber, and the third valve component and the fourth valve component are both inside the second main chamber; the first valve component and the second valve component are both inside the first main chamber, and the third valve component and the fourth valve component are both outside the second main chamber; or the first valve component and the second valve component are both inside the first main chamber, and the third valve component and the fourth valve component are both inside the second main chamber.

[0018] In some embodiments, wherein: the valve seat includes a first coupling surface surrounding the first opening, a second coupling surface surrounding the second opening, a third coupling surface surrounding the third opening, and a fourth coupling surface surrounding the fourth opening; the first valve member includes a first movable sealing surface, wherein when the first movable sealing surface is coupled to the first coupling surface, the first valve member closes the first opening, and when the first movable sealing surface is disconnected from the first coupling surface, the first opening is opened; the second valve member includes a second movable sealing surface, wherein when the second movable sealing surface is coupled to the second coupling surface, the second valve member closes the second opening, and when the second movable sealing surface is disconnected from the second coupling surface, the second opening is opened; the third valve member includes a third movable sealing surface, wherein when the third movable sealing surface is coupled to the third coupling surface, the third valve member closes the third opening, and when the third movable sealing surface is disconnected from the third coupling surface, the third opening is opened; and the fourth valve member includes a fourth movable sealing surface, wherein when the fourth movable sealing surface is coupled to the fourth coupling surface, the fourth valve member closes the fourth opening, and when the fourth movable sealing surface is disconnected from the fourth coupling surface, the fourth opening is opened.

[0019] In some embodiments, the movable sealing surface includes: a plane; and / or a conical surface.

[0020] In some embodiments, wherein: the first opening (A) is opened and communicates with the air outlet (E), and the valve forms a first flow channel; the second opening (B) is opened and communicates with the air outlet (E), and the valve forms a second flow channel; the third opening (C) is opened and communicates with the air inlet (F), and the valve forms a third flow channel; and the fourth opening (D) is opened and communicates with the air inlet (F), and the valve forms a fourth flow channel.

[0021] In some embodiments, wherein: the first flow channel includes a first transverse segment, wherein the distance (Δ1) between the first coupling surface and the first movable sealing surface in the direction of movement of the first valve element limits the size of the flow cross section of the first transverse segment; the second flow channel includes a second transverse segment, wherein the distance (Δ2) between the second coupling surface and the second movable sealing surface in the direction of movement of the first valve element limits the size of the flow cross section of the second transverse segment; the third flow channel includes a third transverse segment, wherein the distance (Δ3) between the third coupling surface and the third movable sealing surface in the direction of movement of the second valve element limits the size of the flow cross section of the third transverse segment; and the fourth flow channel includes a fourth transverse segment, wherein the distance (Δ4) between the fourth coupling surface and the fourth movable sealing surface in the direction of movement of the second valve element limits the size of the flow cross section of the fourth transverse segment.

[0022] In some embodiments, wherein: the first flow channel includes a first longitudinal segment, wherein, in a direction perpendicular to the movement direction of the first valve element, a first gap is formed between the outer edge of the first valve member and the inner wall surface of the valve seat to form the first longitudinal segment; the second flow channel includes a second longitudinal segment, wherein, in a direction perpendicular to the movement direction of the first valve element, a second gap is formed between the outer edge of the second valve member and the inner wall surface of the valve seat to form the second longitudinal segment; the third flow channel includes a third longitudinal segment, wherein, in a direction perpendicular to the movement direction of the second valve element, a third gap is formed between the outer edge of the third valve member and the inner wall surface of the valve seat to form the third longitudinal segment; and / or the fourth flow channel includes a fourth longitudinal segment, wherein, in a direction perpendicular to the movement direction of the second valve element, a fourth gap is formed between the outer edge of the fourth valve member and the inner wall surface of the valve seat to form the fourth longitudinal segment.

[0023] In some embodiments, wherein: the first flow channel includes a first free section, the second flow channel includes a second free section, wherein the first free section and the second free section are defined by the first main chamber; and / or the third flow channel includes a third free section, the fourth flow channel includes a fourth free section, wherein the third free section and the fourth free section are defined by the second main chamber.

[0024] In some embodiments, the assisted expectoration device synchronously controls the spacing (Δ1) between the first coupling surface and the first movable sealing surface in the direction of movement of the first valve element, the spacing (Δ2) between the second coupling surface and the second movable sealing surface in the direction of movement of the first valve element, the spacing (Δ3) between the third coupling surface and the third movable sealing surface in the direction of movement of the second valve element, and the spacing (Δ4) between the fourth coupling surface and the fourth movable sealing surface in the direction of movement of the second valve element, further controlling the direction, velocity, and / or pressure of the airflow at the patient interface.

[0025] In some embodiments, during the assisted expectoration process: the sum of the distance (Δ1) between the first coupling surface and the first movable sealing surface in the direction of movement of the first valve element and the distance (Δ2) between the second coupling surface and the second movable sealing surface in the direction of movement of the first valve element is always equal to the first displacement (S1); and the sum of the distance (Δ3) between the third coupling surface and the third movable sealing surface in the direction of movement of the second valve element and the distance (Δ4) between the fourth coupling surface and the fourth movable sealing surface in the direction of movement of the second valve element is always equal to the second displacement (S2).

[0026] In some embodiments, the first opening (A) and the second opening (B) are opposite to each other in the direction of movement of the first valve element; and the third opening (C) and the fourth opening (D) are opposite to each other in the direction of movement of the second valve element.

[0027] In some embodiments, wherein: the first main chamber defines the first position and the second position on the inner or outer wall surface in the movement direction of the first valve element; and the second main chamber defines the third position and the fourth position on the inner or outer wall surface in the movement direction of the second valve element.

[0028] In some embodiments, the valve seat further includes: a first communication cavity communicating with the first main chamber via the first opening and with the second main chamber via the third opening; and / or a second communication cavity communicating with the first main chamber via the second opening and with the second main chamber via the fourth opening.

[0029] In some embodiments, wherein: the first communication cavity includes an atmospheric port, the first communication cavity being connected to the atmosphere via the atmospheric port; and the second communication cavity includes a patient port, the patient port being pneumatically connected to the patient interface.

[0030] In some embodiments, the movement direction of the first valve element and the movement direction of the second valve element are both the direction of gravity; the first main chamber and the second main chamber are horizontally parallel; the first connecting cavity is below the first main chamber and the second main chamber; and the second connecting cavity is above the first main chamber and the second main chamber.

[0031] In some embodiments, wherein: the first position is the farthest position in which the first valve element can be moved in one direction, the second position is the farthest position in which the first valve element can be moved in the opposite direction; and / or the third position is the farthest position in which the second valve element can be moved in one direction, and the fourth position is the farthest position in which the second valve element can be moved in the opposite direction.

[0032] This application also provides a valve for an auxiliary expectoration device, including a valve seat, a first valve element capable of linear translation, and a second valve element capable of linear translation. The valve seat includes a first main chamber and a second main chamber. The first main chamber includes an air outlet port (E), a first opening (A), and a second opening (B), wherein one of the first opening (A) and the second opening (B) is connected to the atmosphere and the other is connected to the patient's airway. The second main chamber includes an air inlet port (F), a third opening (C), and a fourth opening (D), wherein one of the third opening (C) and the fourth opening (D) is connected to the atmosphere and the other is connected to the patient's airway.

[0033] In some embodiments, the first opening (A) and the second opening (B) are opposite to each other in the direction of movement of the first valve element; and the third opening (C) and the fourth opening (D) are opposite to each other in the direction of movement of the second valve element.

[0034] In some embodiments, the first valve element includes a first valve component and a second valve component, the first valve component facing the first opening and the second valve component facing the second opening; the second valve element includes a third valve component and a fourth valve component, the third valve component facing the third opening and the fourth valve component facing the fourth opening, wherein: the first valve component and the second valve component are both outside the first main chamber, and the third valve component and the fourth valve component are both outside the second main chamber; the first valve component and the second valve component are both outside the first main chamber, and the third valve component and the fourth valve component are both inside the second main chamber; the first valve component and the second valve component are both inside the first main chamber, and the third valve component and the fourth valve component are both outside the second main chamber; or the first valve component and the second valve component are both inside the first main chamber, and the third valve component and the fourth valve component are both inside the second main chamber.

[0035] In some embodiments, the valve for the assisted coughing device further includes: a first linear drive device configured to drive the first valve element to translate linearly; a second linear drive device configured to drive the second valve element to translate linearly; a first additional force application module configured to apply a first additional force to the first valve element along the direction of linear translation of the first valve element, which is monotonic with the position of the first valve element; and / or a second additional force application module configured to apply a second additional force to the second valve element along the direction of linear translation of the second valve element, which is monotonic with the position of the second valve element.

[0036] In some embodiments, the first opening (A) and the third opening (C) are connected to the atmosphere, and the second opening (B) and the fourth opening (D) are connected to the patient's airway. The valve seat further includes: a first communicating cavity communicating with the first main chamber via the first opening and with the second main chamber via the third opening, wherein the first communicating cavity includes an atmosphere port; and / or a second communicating cavity communicating with the first main chamber via the second opening and with the second main chamber via the fourth opening, wherein the second communicating cavity includes a patient port.

[0037] The auxiliary cough device and valve for the auxiliary cough device provided in this application have fast and precise positive and negative pressure switching, good controllability, fast response speed, good sealing performance, small size, simple structure, and high safety, and can comprehensively solve many technical problems existing in the prior art. Attached Figure Description

[0038] The following accompanying drawings describe in detail the exemplary embodiments disclosed in this application. The same reference numerals denote similar structures in several views of the drawings. Those skilled in the art will understand that these embodiments are non-limiting and exemplary, and the drawings are for illustrative purposes only and are not intended to limit the scope of this disclosure. Other embodiments may similarly fulfill the inventive intent of this application. It should be understood that the drawings are not drawn to scale. Wherein:

[0039] Figure 1A A schematic diagram of the airway structure of an auxiliary expectoration device according to an embodiment of this application is shown in one state;

[0040] Figure 1B A schematic diagram of the airway structure of an auxiliary expectoration device provided according to an embodiment of this application is shown in another state;

[0041] Figure 2A-2C The diagram shows three structural schematics of the assisted expectoration devices provided according to embodiments of this application;

[0042] Figures 3A-3F The diagram illustrates six types of "two openings (m, n) opposite each other in the direction of a straight line L" provided according to embodiments of this application;

[0043] Figures 4A-4B The diagram illustrates two scenarios where "two openings (m, n) are not opposite each other in the direction of line L" according to embodiments of this application.

[0044] Figures 5A-5C The following are schematic diagrams illustrating the structures of three valve components provided according to embodiments of this application;

[0045] Figures 6A-6B The diagram shows a schematic representation of two states of an auxiliary expectoration device according to an embodiment of this application.

[0046] Figure 7A A schematic diagram of another state of an auxiliary expectoration device provided according to an embodiment of this application is shown; and

[0047] Figures 8A-8C A schematic diagram of the structure of three valves provided according to embodiments of this application is shown. Detailed Implementation

[0048] The following description provides specific application scenarios and requirements for this application, intended to enable those skilled in the art to manufacture and use the contents of this application. In consideration of the following description, these and other features of this disclosure, as well as the operation and function of related structural elements, and the economy of component combination and manufacture, can be significantly improved. All of these form part of this disclosure with reference to the accompanying drawings. However, it should be clearly understood that the drawings are for illustrative and descriptive purposes only and are not intended to limit the scope of this disclosure. Various partial modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of this disclosure. Therefore, this disclosure is not limited to the embodiments shown, but rather to the widest scope consistent with the claims.

[0049] This application provides an auxiliary expectoration device. The auxiliary expectoration device is sometimes also referred to as a MIE device. The auxiliary expectoration device can generate a positive pressure airflow and apply it to the patient's airway to blow air into the patient. The auxiliary expectoration device can also generate a negative pressure airflow and apply it to the patient's airway to help the patient expel air. The auxiliary expectoration device can also superimpose oscillations on the airflow applied to the patient to help the patient loosen sputum in the airway.

[0050] As an example, Figure 1A This diagram illustrates the airway of an auxiliary expectoration device 001 provided according to an embodiment of this application during inhalation. Figure 1B A schematic diagram of the airway during the expectoration process of an auxiliary expectoration device 001 provided according to an embodiment of this application is shown.

[0051] refer to Figure 1A and Figure 1B The cough assist device 001 may include a patient interface 820. Positive or negative pressure airflow generated by the cough assist device 001 can be applied to the patient's airway via the patient interface 820. The patient interface 820 may include at least one opening on the cough assist device 001. On one hand, gas in the patient's lungs and airway can enter the cough assist device 001 via the patient interface 820. On the other hand, the positive pressure airflow generated by the cough assist device 001 can also be introduced into the patient's airway via the patient interface 820.

[0052] The cough assist device 001 may also include an atmospheric interface 810. The atmospheric interface 810 may include at least one opening on the cough assist device 001. On the one hand, air can enter the cough assist device 001 through the atmospheric interface 810. On the other hand, gas expelled by the patient can also be discharged to the atmosphere through the atmospheric interface 810.

[0053] The cough assist device 001 may include a blower 900. The blower 900 may include a blower inlet 910 and a blower outlet 920. Gas enters the blower 900 through the blower inlet 910. Gas exits the blower 900 through the blower outlet 920. The blower 900 can be used to regulate the gas pressure. In some embodiments, the blower 900 may include, but is not limited to, a turbine blower, a blower, a bellows, etc.

[0054] The cough assist device 001 may include a valve 002. The valve 002 may include a plurality of channels. The plurality of channels are configured to allow gas to pass through.

[0055] refer to Figure 1A During the blow-in phase, valve 002 may include a first passage and a second passage. One end of the first passage is connected to the atmospheric interface 810, and the other end is connected to the fan inlet 910. One end of the second passage is connected to the fan outlet 920, and the other end is connected to the patient interface 820. Figure 1A As indicated by the solid arrow, during the blowing-in phase, the assisted cough device 001 can draw air from the atmosphere through the atmospheric interface 810, pressurize the air, and then blow it into the patient's airway through the patient interface 820—applying positive pressure to the patient's airway.

[0056] refer to Figure 1B During the discharge phase, valve 002 may include a third passage and a fourth passage. One end of the third passage is connected to the patient interface 820, and the other end is connected to the fan inlet 910. One end of the fourth passage is connected to the fan outlet 920, and the other end is connected to the atmospheric interface 810. Figure 1B As indicated by the dashed arrow, the cough assist device 001 can generate negative pressure and apply it to the patient's airway via the patient port 820 to help the patient expel air to the atmosphere.

[0057] As an example, Figure 2A A schematic diagram of a fan 900 and a valve 002 according to an embodiment of this application is shown. As an example, Figure 2B A schematic diagram of a valve 002 according to an embodiment of this application is shown. (Reference) Figure 2A and Figure 2B Valve 002 may include valve seat 100, a first valve element 201 capable of linear translation, and a second valve element 202 capable of linear translation. For ease of description, in the following description of this application, "first straight line L1" represents the direction of linear translation of the first valve element 201, and "second straight line L2" represents the direction of linear translation of the second valve element 202.

[0058] The valve seat 100 has a cavity structure. The cavity can form a channel for airflow. There can be multiple cavity structures. Specifically, the valve seat 100 may include a first main chamber 410 and a second main chamber 420. In some embodiments, the valve seat 100 may also include a first communicating cavity 610 and / or a second communicating cavity 620.

[0059] Valve seat 100 may include multiple openings. These openings may include on / off ports that can be controlled to open or close during operation. The multiple openings may also include a normally open opening that is always open during operation. Specific openings and specific cavities together define specific passageways. The multiple openings may be disposed on the wall, ribs, or inner cavity partitions of valve seat 100. In some embodiments, openings on the outer wall may serve as connecting terminals to connect the inner cavity of valve seat 100 to the air passages of other components. In some embodiments, openings on the ribs or partitions within valve seat 100 may be used to connect two adjacent cavities separated by the ribs or partitions. As an example, the multiple openings may include a first opening A, a second opening B, a third opening C, and a fourth opening D. In some embodiments, the multiple openings may also include an outlet port E and / or an inlet port F. In some embodiments, the multiple openings may also include an atmospheric port G and / or a patient port H.

[0060] In some embodiments, the valve seat 100 may include a first main chamber 410. In some embodiments, the first main chamber 410 may include a cylindrical cavity extending along a first straight line L1. As an example, the first main chamber 410 may be a cylindrical or prismatic cavity extending along the first straight line L1. The first main chamber 410 may include a first opening A and a second opening B. Both the first opening A and the second opening B may be openable or closedable. Both the first opening A and the second opening B may be controlled to open or close by a valve component. In some embodiments, the valve seat 100 may include a first coupling surface P1 surrounding the first opening A and a second coupling surface P2 surrounding the second opening B. The first coupling surface P1 is annularly surrounding the first opening A. The surface area of ​​the first valve component 200a corresponding to the first opening A is larger than the area of ​​the first opening A, and the first opening A is completely closed when the outer edge of the first valve component 200a is attached to the first coupling surface P1. The second coupling surface P2 is annularly surrounding the second opening B. The surface area of ​​the second valve component 200b corresponding to the second opening B is larger than the area of ​​the second opening B. When the outer edge of the second valve component 200b is attached to the second coupling surface P2, the second opening B is completely closed. The first opening A and the second opening B constitute a first pair of openings. The first main chamber 410 is located between and communicates with the first pair of openings (A, B). The first opening A and the second opening B can be respectively located at opposite ends of the first main chamber 410. For example, the first opening A is at the top of the first main chamber 410 along the first straight line L1, and the second opening B is at the bottom of the first main chamber 420 along the first straight line L1. The first main chamber 410 may also include an outlet port E. At times, the second opening B is completely closed, and the outlet port E communicates only with the first opening A. At times, the first opening A is closed, and the outlet port E communicates only with the second opening B. At times, both the first opening A and the second opening B are open, and the outlet port E communicates with both the first opening A and the second opening B simultaneously. As an example, the air outlet port E is connected to the fan inlet 910, the first opening A is connected to the atmospheric port G, and the second opening B is connected to the patient port H. As an example, the air outlet port E can be located on the side wall 411 of the first main chamber 410 perpendicular to the first straight line L1 (e.g., Figure 2A and Figure 2B As shown), this approach minimizes the length of the airway and the size of the auxiliary expectoration device, thereby improving response speed. Of course, those skilled in the art will understand that the air outlet E can also be located in other positions within the first main chamber 410 (e.g., Figure 2A and Figure 2B (as shown at the top or bottom) without affecting the core spirit of this application.

[0061] In some embodiments, the valve seat 100 may include a second main chamber 420. In some embodiments, the second main chamber 420 may include a cylindrical cavity extending along a second straight line L2. As an example, the second main chamber 420 may be a cylindrical or prismatic cavity extending along the second straight line L2. In some embodiments, the first main chamber 410 and the second main chamber 420 have the same shape and size. The second main chamber 420 may include a third opening C and a fourth opening D. Both the third opening C and the fourth opening D may be openable or closed. Both the third opening C and the fourth opening D may be controlled to open or close by the valve member 200. In some embodiments, the valve seat 100 includes a third coupling surface P3 surrounding the third opening C and a fourth coupling surface P4 surrounding the fourth opening D. The third coupling surface P3 is annularly surrounding the third opening C. The surface area of ​​the third valve member 200c directly opposite the third opening C is larger than the area of ​​the third opening C, and the third opening C is completely closed when the outer edge of the third valve member 200c is attached to the third coupling surface P3. The fourth coupling surface P4 is annularly surrounding the fourth opening D. The surface area of ​​the fourth valve member 200d, which is directly opposite the fourth opening D, is larger than the area of ​​the fourth opening D. When the outer edge of the fourth valve member 200d is attached to the fourth coupling surface P4, the fourth opening D is completely closed. The third opening C and the fourth opening D constitute the second pair of openings. The second main chamber 420 is located between and communicates with the second pair of openings (C, D). The third opening C and the fourth opening D can be respectively located at opposite ends of the second main chamber 420. For example, the third opening C is at the top of the second main chamber 420 along the second straight line L2, and the fourth opening D is at the bottom of the second main chamber 420 along the second straight line L2. The second main chamber 420 may also include an air inlet port F. In some cases, the fourth opening D is completely closed, and the air inlet port F communicates only with the third opening C. In other cases, the third opening C is completely closed, and the air inlet port F communicates only with the fourth opening D. At times, both the third opening C and the fourth opening D are open, and the air inlet port F is simultaneously connected to both the third opening C and the fourth opening D. As an example, the air inlet port F is connected to the fan outlet 920, the air inlet C is connected to the atmospheric port G, and the air inlet D is connected to the patient port H. As an example, the air inlet port F can be located on the side wall 421 of the second main chamber 420, perpendicular to the second straight line L2. This minimizes the length of the air path and the volume of the auxiliary expectorant device, thereby improving the response speed. Of course, those skilled in the art will understand that the air inlet port F can also be located in other positions within the second main chamber 420 (such as the top or bottom) without affecting the core spirit of this application.

[0062] As an example, the first opening A and the second opening B are opposite to each other in the direction of the first straight line L1. As an example, the third opening C and the fourth opening D are opposite to each other in the direction of the second straight line L2. As an example, Figure 3A , Figure 3B , Figure 3C , Figure 3D , Figure 3E , Figure 3F The diagram illustrates six scenarios where "two openings (m, n) are opposite each other in the direction of a straight line L," according to embodiments of this application. As an example, Figure 4A and Figure 4B Two schematic diagrams are shown, showing that "the two openings (m, n) are not opposite each other in the direction of the straight line L". Figure 4A The two openings (m, n) shown are adjacent but not opposite. Figure 4B The two openings (m, n) shown are opposite each other along the line L, but not opposite each other along the line L. (Reference) Figures 3A-3F Openings m and n being opposite each other along line L can include openings m and n being directly opposite each other along line L, and openings a and b being diagonally opposite each other along line L. As an example, Figure 3A , Figure 3B , Figure 3C A schematic diagram showing three openings a and b provided according to embodiments of this application, directly opposite each other along the straight line L. As an example, Figure 3D , Figure 3E , Figure 3F A schematic diagram showing three openings a and b provided according to embodiments of this application, obliquely opposite each other along a straight line L. (Continue to refer to...) Figure 2A and Figure 2B As an example, the first opening A and the second opening B can be directly opposite each other in the direction of the first straight line L1, or they can be diagonally opposite each other in the direction of the first straight line L1. Figure 2A and Figure 2B In the illustrated embodiment, the first opening A and the second opening B are directly opposite each other in the direction of the first straight line L1. The third opening C and the fourth opening D may be directly opposite each other in the direction of the second straight line L2, or they may be diagonally opposite each other in the direction of the second straight line L2. Figure 2A and Figure 2B In the embodiment shown, the third opening C and the second opening D are directly opposite each other in the direction of the second straight line L2.

[0063] Continue to refer to Figure 2A and Figure 2B In some embodiments, the first main chamber 410 and the second main chamber 420 are not directly connected. Specifically, as shown in the example... Figure 2A and Figure 2BAs shown, there are no through holes / channels on the adjacent wall T of the first main chamber 410 and the second main chamber 420 that directly connect the first main chamber 410 and the second main chamber 420. As an example, the first opening A, the second opening B, the outlet port E, and the first main chamber 410 form a two-position three-way valve (first two-position three-way valve), and the third opening C, the fourth opening D, the inlet port F, and the second main chamber 420 form another two-position three-way valve (second two-position three-way valve). These two two-position three-way valves have independent internal structures and are connected to other pipelines and gas paths only through six openings (A, B, C, D, E, F).

[0064] In some embodiments, the valve seat 100 may further include a first communication cavity 610. The first communication cavity 610 may include the first opening A and the third opening C. The first communication cavity 610 communicates with a first main chamber 410 via the first opening A and with a second main chamber 420 via the third opening C. The first communication cavity 610 may also include an atmospheric port G, through which the first communication cavity 610 communicates with the atmosphere. The first communication cavity 610 is configured to communicate the first opening A and the third opening C with the atmospheric port G.

[0065] In some embodiments, the valve seat 100 may further include a second communication cavity 620. The second communication cavity 620 may include the second opening B and the fourth opening D. The second communication cavity 620 may communicate with the first main chamber 410 via the second opening B and with the second main chamber 420 via the fourth opening D. The second communication cavity 620 may include a patient port H. The patient port H is used for airway connection to a patient's airway. Specifically, the patient port H is airway connected to the patient interface 820. The second communication cavity 620 is configured to communicate the second opening B and the fourth opening D with the patient port H.

[0066] In some embodiments, the first main chamber 410 and the second main chamber 420 are located between the first connecting chamber 610 and the second communicating chamber 620. As an example, the first main chamber 410 and the second main chamber 420 can be arranged side-by-side. The first opening A of the first main chamber 410 for connecting to the atmosphere and the third opening C of the second main chamber 420 for connecting to the atmosphere are both at one end, and the second opening B of the first main chamber 410 for connecting to the patient end and the fourth port D of the second main chamber 420 for connecting to the patient end are both at the other end. The first communicating chamber 610 can be at one end of the first main chamber 410 and the second main chamber 420, and the second communicating chamber 620 can be at the other end of the first main chamber 410 and the second main chamber 420. This allows the structure of the valve 002 and the auxiliary expectoration device 001 to be as compact as possible, shortening the airway length, increasing the switching speed, and improving the response speed of the auxiliary expectoration device 001 while ensuring a large cross-sectional diameter of the channel. As an example, the first straight line L1 and the second straight line L2 can both be in the direction of gravity, and the first main chamber 410 and the second main chamber 420 are horizontally aligned side by side. In some embodiments, the first connecting cavity 610 is above the first main chamber 410 and the second main chamber 420, and the second connecting cavity 620 is below the first main chamber 410 and the second main chamber 420. Placing the first connecting cavity 610, including the atmospheric port G, at the top facilitates heat dissipation and exhaust, while placing the heavier first linear drive device 510 and the second linear drive device 520 at the bottom lowers the center of gravity of the auxiliary coughing device, increasing stability. Of course, in some embodiments, the second connecting cavity can be above the first main chamber and the second main chamber, and the first connecting cavity can be below the first main chamber and the second main chamber. For example, for better waterproofing, the first and second linear drive devices can be positioned at the top. In this case, the second connecting cavity 620 can be positioned above the first and second main chambers 410 and 420, while the first connecting cavity 610 can be positioned below the first and second main chambers 410 and 420. As an example, the air outlet E can be located on the side wall of the first main chamber 410, and the air inlet F can be located on the side wall of the second main chamber 420. This can further shorten the length of the air path between the valve 002 and the fan 900, improve the response speed of the auxiliary coughing device 001, reduce its size, and increase the switching speed.

[0067] In some embodiments, the valve seat 100 may include a plurality of removable housings. The plurality of removable housings are connected to form the valve seat 100. As an example, the connection may be a threaded connection. For example... Figure 2AAs shown, the first valve component 200a and the second valve component 200b are located in the first main chamber 410, and the second valve component 200c and the fourth valve component 200d are located in the second main chamber 420. In this case, the valve seat 100 may include a top plate, a main housing, and a lower housing. This arrangement facilitates the installation of the valve components 200.

[0068] The first valve element 201 and the second valve element 202 can be control components of valve 002. The first valve element 201 and the second valve element 202 are mechanically separated and independent. The first valve element 201 and the second valve element 202 cooperate to control the operating state of valve 002. As mentioned above, the first valve element 201 and the second valve element 202 can be linearly translated. As an example, the auxiliary coughing device 001 controls the operating state of the auxiliary coughing device 001 by adjusting the parameters of the linear translation of the first valve element 201 and / or the parameters of the linear translation of the second valve element 202, thereby causing valve 002 to form different passages. As an example, the parameters may include, but are not limited to, the direction, speed, displacement, and reciprocating frequency of the linear translation. As an example, the first valve element 201 and the second valve element 202 can control valve 002 to form... Figure 1A The first and second passages shown connect the patient interface 820 and the fan outlet 920, generating positive pressure at the patient interface 820. As an example, the first valve element 201 and the second valve element 202 can control valve 002 to form... Figure 1B The third and fourth passages shown connect the patient interface 820 and the fan inlet 910, generating negative pressure at the patient interface 820. Specifically, the first valve element 201 may include a first valve component 200a and a second valve component 200b, and the second valve element 202 may include a third valve component 200c and a fourth valve component 200d.

[0069] As an example, Figure 5A A schematic diagram of a valve component 200 according to an embodiment of this application is shown. The valve component 200 is an element for controlling the opening and closing of an opening. One valve component 200 controls the opening and closing of one opening. The valve component 200 is movable relative to the valve seat 100. As an example, the valve component 200 may be plate-shaped. As an example, the valve component 200 may be a valve disc. Specifically, the valve component 200 may include a support portion 210 and an elastic sealing portion 220.

[0070] The support portion 210 can provide support for the resilient sealing portion 220. As an example, the support portion 210 can be made of a rigid material (e.g., hard plastic, steel, alloy, etc.).

[0071] The resilient seal 220 is elastic. As an example, the resilient seal 220 is made of an elastic material (such as silicone). The resilient seal 220 is fixed to the support 210. The resilient seal 220 includes an outer edge 221 surrounding the corresponding opening. After the valve member 200 closes the corresponding opening, the resilient seal 220 is pressed between the valve seat 100 and the support plate 210, creating a sealing effect at the edge of the corresponding opening. In some embodiments, the resilient seal 220 is fixed to the surface 211 of the support 210 facing the corresponding opening, such as... Figure 5A As shown. For example, the resilient sealing part 220 can be glued to the surface 211 of the support part 210 facing the corresponding opening. As an example, Figure 5B A schematic diagram of another valve component 200 according to an embodiment of this application is shown. (Reference) Figure 5B In some embodiments, the elastic sealing part 220 is sleeved around the outer edge of the support part 210. During the operation of the assisted expectoration device, the elastic sealing part 220 is more prone to wear. By sleeved around the support plate 210, the elasticity of the elastic sealing part 220 itself can fix the elastic sealing part 220 to the support plate 210 without the need for additional adhesives or other components. This facilitates installation and disassembly, and makes the replacement of the elastic sealing part 220 more convenient.

[0072] It should be noted that, Figure 5A and Figure 5B In the structure of the valve component shown, the elastic sealing portions 220 are all fixed to the support portion 210, forming part of the valve component 200. However, those skilled in the art will readily understand that in some embodiments, the elastic sealing portions 220 can be fixed to the valve seat 100 (for example, the elastic sealing portion 220 can be an O-ring or annular sealing sheet, fixed to the valve seat 100, and surrounding the corresponding opening in a ring shape), without departing from the core spirit of the invention described in this application.

[0073] As described above, the valve component 200 can close the corresponding opening when it is fitted onto the coupling surface surrounding the corresponding opening. As an example, the valve component 200 includes a movable sealing surface 230. The movable sealing surface 230 can couple with a coupling surface on a valve seat to close the corresponding opening. In some embodiments, the movable sealing surface 230 can be a plane, such as... Figure 2A As shown. (This is an example.) Figure 5C A schematic diagram of another valve component 200 according to an embodiment of this application is shown. (Reference) Figure 5C In some embodiments, the movable sealing surface 230 may include a conical surface.

[0074] As previously mentioned, the valve component 200 can control the opening and closing state of the corresponding opening. It should be noted that the opening and closing state includes, but is not limited to, "the opening is fully open", "the opening is fully closed", and "the extent to which the opening is opened". The assisted expectoration device 001 can adjust the airflow direction, flow rate, and / or pressure at the patient interface by adjusting the opening and closing state of each valve component.

[0075] refer to Figure 2A and Figure 2B The first valve element 201 may include a first valve component 200a and a second valve component 200b.

[0076] The first valve member 200a may be directly opposite the first opening A and is configured to control the opening and closing state of the first opening A. As previously described, the valve seat 100 includes a first coupling surface P1 surrounding the first opening A. As an example, the first valve member 200a includes a first movable sealing surface Q1. As an example, the first movable sealing surface Q1 may include a plane and / or a conical surface. When the first movable sealing surface Q1 is coupled with the first coupling surface P1, the first valve member 200a closes the first opening A; when the first movable sealing surface Q1 is decoupled from the first coupling surface P1, the first opening A is opened.

[0077] As an example, Figure 2C A schematic diagram showing a first opening A being opened according to an embodiment of this application is shown. (Reference) Figure 2C When the first opening A is opened, it communicates with the outlet port E, and the valve 002 forms a first flow channel 810. The first flow channel 810 may include a first transverse section 811. The distance Δ1 between the first coupling surface and the first movable sealing surface in the moving direction L1 of the first valve element 201 limits the size of the flow cross section of the first transverse section 811. The flow rate of the airflow allowed through the first flow channel 810 is positively correlated with the distance Δ1 between the first coupling surface and the first movable sealing surface in the moving direction of the first valve element. Under the same conditions, the larger Δ1 is, the larger the flow rate of the airflow through the first flow channel 810; the smaller Δ1 is, the smaller the flow rate of the airflow through the first flow channel 810; when Δ1 is zero, the flow rate of the airflow through the first flow channel 810 is zero—the first opening A is closed. In some embodiments, the first flow channel 810 may also include a first longitudinal section 812. In a direction perpendicular to the movement direction L1 of the first valve element 201, the outer edge of the first valve member 200a has a first gap W1 between it and the inner wall surface of the valve seat 100, forming the first longitudinal section 812. In some embodiments, the first flow channel may further include a first free section 813, which is defined by the first main chamber 410.

[0078] Continue to refer to Figure 2A and Figure 2B The second valve member 200b can be directly opposite the second opening B and is configured to control the opening and closing state of the second opening B. As previously described, the valve seat 100 includes a second coupling surface P2 surrounding the second opening B. As an example, the second valve member 200b includes a second movable sealing surface Q2. As an example, the second movable sealing surface Q2 may include a plane and / or a conical surface. When the second movable sealing surface Q2 is coupled with the second coupling surface P2, the second valve member 200b closes the second opening B; when the second movable sealing surface Q2 is decoupled from the second coupling surface P2, the second opening B is opened.

[0079] As an example, Figure 2C A schematic diagram showing a second opening B being opened according to an embodiment of this application is shown. (Reference) Figure 2C When the second opening B is opened, it communicates with the outlet port E, and the valve 002 forms a second flow channel 820. The second flow channel 820 may include a second transverse section 821. The distance Δ2 between the second coupling surface and the second movable sealing surface in the first valve element movement direction L1 limits the size of the flow cross section of the second transverse section 821. The flow rate of the airflow allowed through the second flow channel 820 is positively correlated with the distance Δ2 between the second coupling surface and the second movable sealing surface in the first valve element movement direction L1. All other things being equal, the larger Δ2 is, the larger the flow rate of the airflow through the second flow channel 820; the smaller Δ2 is, the smaller the flow rate of the airflow through the second flow channel 820; when Δ2 is zero, the flow rate of the airflow through the second flow channel 820 is zero—the second opening B is closed. In some embodiments, the second flow channel 820 may also include a second longitudinal section 822. In a direction perpendicular to the movement direction L1 of the first valve element 201, the outer edge of the second valve member 200b has a second gap W2 between it and the inner wall surface of the valve seat 100, forming the second longitudinal section 822. In some embodiments, the second flow channel 820 may further include a second free section 823, which is defined by the first main chamber 410.

[0080] Continue to refer to Figure 2A and Figure 2B In some embodiments, the first valve element 201 may further include a first support structure that provides support for the first valve member 200a and the second valve member 200b. The first valve member 200a and the second valve member 200b may be fixed to the first support structure. As an example, the first support structure is a support rod.

[0081] like Figure 2A and Figure 2B As shown, the first valve element 201 may include a first rod 310. The first rod 310 extends along the movement direction L1 of the first valve element 201. The first valve component 200a and the second valve component 200b are both fixed to the first rod 310. The fixing method includes, but is not limited to, threaded connection, snap-fit, integrated design, etc. The first valve component 200a and the second valve component 200b may be spaced apart in the movement direction L1 of the first valve element. In some embodiments, one end of the first rod 310 is fixedly connected to the first linear drive device 510. For example, one end of the first rod 310 is fixed to the output shaft of the first linear drive device 510, so that the first valve element 201 can be linearly translated along the first straight line L1 under the drive of the first linear drive device 510. As an example, one end of the first rod 310 is detachably connected to the first linear drive device 510. As an example, the detachable connection is a threaded connection. In some embodiments, the first rod 310 is at least partially located within the first main chamber 410. As an example, one end of the first rod 310 extends out of the first main chamber 410 via the first opening A or the second opening B to connect to a first linear drive device 510 located outside the first main chamber 410. For example Figure 2A-2B As shown, the lower end of the first rod 310 extends out of the first main chamber 410 via the second opening B and is connected to the first linear drive device 510. The first drive device 510 drives the first valve element 201 to move via the first rod 310. In some embodiments, for ease of installation and disassembly, the first rod 310 may include at least two segments, which are detachably connected. As an example, the detachable connection may be a threaded connection.

[0082] refer to Figure 2A and Figure 2B The second valve element 202 may include a third valve component 200c and a fourth valve component 200d.

[0083] The third valve component 200c is positioned directly opposite the third opening C and configured to control the opening and closing state of the third opening C. As previously described, the valve seat 100 includes a third coupling surface P3 surrounding the third opening C. As an example, the third valve component 200c includes a third movable sealing surface Q3. As an example, the third movable sealing surface Q3 may include a plane and / or a conical surface. When the third movable sealing surface Q3 is coupled to the third coupling surface P3, the third valve component 200c closes the third opening C; when the third movable sealing surface Q3 is discoupled from the third coupling surface P3, the third opening C is opened.

[0084] As an example, Figure 2C A schematic diagram showing a third opening C being opened according to an embodiment of this application is shown. (Reference) Figure 2C When the third opening C is opened, it communicates with the air inlet port F, and the valve 002 forms a third flow channel 830. The third flow channel 830 may include a third transverse section 831. The distance Δ3 between the third coupling surface and the third movable sealing surface in the moving direction L2 of the second valve element 202 limits the size of the flow cross section of the third transverse section 831. The flow rate of the airflow allowed through the third flow channel 830 is positively correlated with the distance Δ3 between the third coupling surface and the third movable sealing surface in the moving direction L2 of the second valve element. Under the same conditions, the larger Δ3 is, the larger the flow rate of the airflow through the third flow channel 830; the smaller Δ3 is, the smaller the flow rate of the airflow through the third flow channel 830; when Δ3 is zero, the flow rate of the airflow through the third flow channel 830 is zero—the third opening C is closed. In some embodiments, the third flow channel 830 may also include a third longitudinal section 832. In a direction perpendicular to the movement direction L2 of the second valve element, a third gap W3 is formed between the outer edge of the third valve member 200c and the inner wall surface of the valve seat 100, forming the third longitudinal section 832. In some embodiments, the third flow channel 830 may further include a third free section 833, which is defined by the second main chamber 420.

[0085] Continue to refer to Figure 2A and Figure 2B The fourth valve member 200d is positioned directly opposite the fourth opening D and configured to control the opening and closing state of the fourth opening D. As previously described, the valve seat 100 includes a fourth coupling surface P4 surrounding the fourth opening D. As an example, the fourth valve member 200d includes a fourth movable sealing surface Q4. As an example, the fourth movable sealing surface Q4 may include a plane and / or a conical surface. When the fourth movable sealing surface Q4 is coupled to the fourth coupling surface P4, the fourth valve member 200d closes the fourth opening D; when the fourth movable sealing surface Q4 is discoupled from the fourth coupling surface P4, the fourth opening D is opened.

[0086] As an example, Figure 2C A schematic diagram showing a fourth opening D being opened according to an embodiment of this application is shown. (Reference) Figure 2CWhen the fourth opening D is opened, it communicates with the air inlet port F, and the valve 002 forms a fourth flow channel 840. The fourth flow channel 840 may include a fourth transverse section 841. The distance Δ4 between the fourth coupling surface and the fourth movable sealing surface in the second valve element movement direction L2 limits the size of the flow cross section of the fourth transverse section 841. The flow rate of the airflow allowed through the fourth flow channel 840 is positively correlated with the distance Δ4 between the fourth coupling surface and the fourth movable sealing surface in the second valve element movement direction L2. Under the same conditions, the larger Δ4 is, the larger the flow rate of the airflow through the fourth flow channel 840; the smaller Δ4 is, the smaller the flow rate of the airflow through the fourth flow channel 840; when Δ4 is ​​zero, the flow rate of the airflow through the fourth flow channel 840 is zero—the fourth opening D is closed. In some embodiments, the fourth flow channel 840 may also include a fourth longitudinal section 842. In a direction perpendicular to the movement direction L2 of the second valve element 202, a fourth gap W4 is formed between the outer edge of the fourth valve member 200d and the inner wall surface of the valve seat 100, forming the fourth longitudinal section 842. In some embodiments, the fourth flow channel 840 may further include a fourth free section 843, which is defined by the second main chamber 420.

[0087] Continue to refer to Figure 2A and Figure 2B In some embodiments, the second valve element 202 may further include a second support structure. The second support structure provides support for the third valve member 200c and the fourth valve member 200d. The third valve member 200c and the fourth valve member 200d may be fixed to the second support structure. As an example, the second support structure is a support rod.

[0088] like Figure 2A and Figure 2BAs shown, the second valve element 202 may include a second rod 320. The second rod 320 extends along the movement direction L2 of the second valve element 202. The third valve component 200c and the fourth valve component 200d may both be fixed to the second rod 320. The fixing method includes, but is not limited to, threaded connection, snap-fit, integrated design, etc. The third valve component 200c and the fourth valve component 200d may be spaced apart in the movement direction L2 of the second valve element. In some embodiments, one end of the second rod 320 is fixedly connected to the second linear drive device 520. For example, one end of the second rod 320 is fixed to the output shaft of the second linear drive device 520, so that the second valve element 202 can be linearly translated along the second straight line L2 under the drive of the second linear drive device 520. As an example, one end of the second rod 320 is detachably connected to the second linear drive device 520. As an example, the detachable connection is a threaded connection. In some embodiments, the second rod 320 is at least partially located within the second main chamber 420. As an example, one end of the second rod 320 extends out of the second main chamber 420 via the third opening C or the fourth opening D to connect to a second linear drive device 520 located outside the second main chamber 420. For example Figure 2A-2B As shown, the lower end of the second rod 320 extends out of the second main chamber 420 via the fourth opening D and connects to the second linear drive device 520. The second drive device 520 drives the second valve element 202 to move via the second rod 320. In some embodiments, for ease of installation and disassembly, the second rod 320 may include at least two detachable segments. As an example, the detachable segment connection may be a threaded connection.

[0089] In some embodiments, the assisted coughing device 001 may further include a first linear drive device 510. The first linear drive device 510 provides power for the linear translation of the first valve element 201, and the first linear drive device 510 can drive the first valve element 201 to translate linearly along a first straight line L1. As an example, the first linear drive device 510 may include, but is not limited to, a voice coil motor, a linear electromagnet, a linear motor, or a device that converts rotary drive into linear drive by a motion conversion device (e.g., a cam push rod, a connecting rod slider, etc.) and a rotary motor.

[0090] In some embodiments, the assisted cough device 001 may further include a second linear drive device 520. The second linear drive device 520 provides power for the linear translation of the second valve element 202. The second linear drive device 520 can drive the second valve element 202 to translate linearly along a second straight line L2. As an example, the second linear drive device 520 may include, but is not limited to, a voice coil motor, a linear electromagnet, a linear motor, or a device that converts rotary drive into linear drive by a motion conversion device (e.g., a cam push rod, a connecting rod slider, etc.) and a rotary motor.

[0091] In some embodiments, the first linear drive device 510 is located outside the first main chamber 410, and the second linear drive device 520 is located outside the second main chamber 420. In some embodiments, the first linear drive device 510 and the second linear drive device 520 can be located outside the valve seat 100, driving the valve member located within the valve seat 100 to translate linearly via a rod / shaft passing through the valve seat 100. This isolates the first and second linear drive devices from the air passage, resulting in better waterproofing. (Reference) Figure 2A and Figure 2B As an example, the first valve component 200a and the second valve component 200b can be fixed to the first rod 310. The first valve component 200a and the second valve component 200b are spaced apart along the first rod 310 and fixed relative to the first rod 310. Driven by the first linear drive device 510, the first valve component 200a and the second valve component 200b move synchronously along the first straight line L1, synchronously controlling the opening and closing states of the first opening A and the second opening B. The third valve component 200c and the fourth valve component 200d can be fixed to the second rod 320. The third valve component 200c and the fourth valve component 200d are spaced apart along the second rod 320 and fixed relative to the second rod 310. Driven by the second linear drive device 520, the third valve component 200c and the fourth valve component 200d move synchronously along the second straight line L2, synchronously controlling the opening and closing states of the third opening C and the fourth opening D.

[0092] In some embodiments, the assisted coughing device 001 may further include a first additional force application module 710. The first additional force application module 710 may apply a first additional force F1 to the first valve element 201 along the direction L1 of linear translation of the first valve element 201. This first additional force is monotonically related to the position x1 of the first valve element 201 (i.e., the first additional force F1 is a monotonic function of the position x1 of the first valve element), thereby improving controllability and switching speed. As an example, the first additional force application module 710 may include a spring.

[0093] In some embodiments, the assisted coughing device 001 may further include a second additional force application module 720. The second additional force application module 720 may apply a second additional force F2 to the second valve element 202 along the direction L2 of linear translation of the second valve element 202. This second additional force is monotonically related to the position x2 of the second valve element (i.e., the second additional force F2 is a monotonic function of the position x2 of the second valve element) to improve controllability and switching speed. As an example, the second additional force application module 720 may include a spring.

[0094] Continue to refer to Figure 2A and Figure 2B As previously described, the first valve element 201 and the second valve element 202 are linearly translatable. As an example, the first valve element 201 can be linearly translated along the first straight line L1 between a first position and a second position. The first valve element 201 can be linearly translated relative to the valve seat 100 from the first position by a first displacement S1 to the second position. The second valve element 202 can be linearly translated along the second straight line L2 between a third position and a fourth position. The second valve element 202 can be linearly translated relative to the valve seat 100 from the third position by a second displacement S2 to the fourth position. As an example, Figure 6A The first position of the first valve element 201 and the fourth position of the second valve element 202 are shown. Figure 6B The second position of the first valve element 201 and the third position of the second valve element 202 are shown.

[0095] refer to Figure 6A and Figure 6B The first position can be the furthest position the first valve element 201 can move in one direction, and the second position can be the furthest position the first valve element 201 can move in the opposite direction. In some embodiments, the first main chamber 410 defines the first position and the second position on its inner or outer wall surface in the movement direction L1 of the first valve element 201. As an example, when both the first valve member 200a and the second valve member 200b are within the first main chamber 410, the inner wall surface of the first main chamber 410 in the movement direction L1 of the first valve element 201 defines the first position and the second position, for example... Figure 6A and Figure 6B As shown. When both the first valve component 200a and the second valve component 200b are outside the first main chamber 410, the outer wall surface of the first main chamber 410 in the moving direction L1 of the first valve element 201 defines the first position and the second position, for example... Figure 8AAs shown. Specifically, the first coupling surface P1 defines the first position, and the second coupling surface P2 defines the second position. In some embodiments, the first displacement S1 is not less than 3 mm. This achieves a balance between rapid position switching and a larger flow rate.

[0096] Continue to refer to Figure 6A and Figure 6B The third position can be the furthest position the second valve element 202 can move in one direction, and the fourth position can be the furthest position the second valve element 202 can move in the opposite direction. In some embodiments, the third and fourth positions are defined by the inner or outer wall surface of the second main chamber 420 in the movement direction L2 of the second valve element 202. As an example, when both the third valve member 200c and the fourth valve member 200d are within the second main chamber 420, the third and fourth positions are defined by the inner wall surface of the second main chamber 420 in the movement direction L2 of the second valve element 202. When both the third valve member 200c and the fourth valve member 200d are outside the second main chamber 420, the third and fourth positions are defined by the outer wall surface of the second main chamber 420 in the movement direction L2 of the second valve element 202. Specifically, the third coupling surface P3 defines the third position, and the fourth coupling surface P4 defines the fourth position. In some embodiments, the second displacement S2 is not less than 3 mm. This approach strikes a balance between rapid location switching and larger runoff volumes.

[0097] As described above, the distance (Δ1) between the first coupling surface and the first movable sealing surface on the first straight line determines the extent to which the first opening A is opened; the distance (Δ2) between the second coupling surface and the second movable sealing surface on the first straight line determines the extent to which the second opening B is opened; the distance (Δ3) between the third coupling surface and the third movable sealing surface on the second straight line determines the extent to which the third opening C is opened; and the distance (Δ4) between the fourth coupling surface and the fourth movable sealing surface on the second straight line determines the extent to which the fourth opening D is opened. The extent to which the four openings A / B / C / D are opened determines the working state of the auxiliary coughing device (including but not limited to blowing in / expelling / pausing / oscillating / …).

[0098] In some embodiments, the assisted expectoration device 001 synchronously controls the distance Δ1 between the first coupling surface and the first movable sealing surface in the moving direction of the first valve element, the distance Δ2 between the second coupling surface and the second movable sealing surface in the moving direction of the first valve element, the distance Δ3 between the third coupling surface and the third movable sealing surface in the moving direction of the second valve element, and the distance Δ4 between the fourth coupling surface and the fourth movable sealing surface in the moving direction of the second valve element, further controlling the flow direction, flow rate, and / or pressure of the airflow at the patient interface.

[0099] In some embodiments, the sum of the distance (Δ1) between the first coupling surface and the first movable sealing surface on the first straight line and the distance (Δ2) between the second coupling surface and the second movable sealing surface on the first straight line is constant. For example, during the operation of the auxiliary expectoration device 001: the sum of the distance Δ1 between the first coupling surface and the first movable sealing surface in the direction of movement of the first valve element and the distance Δ2 between the second coupling surface and the second movable sealing surface in the direction of movement of the first valve element is always equal to the first displacement S1, i.e., Δ1 + Δ2 = S1. In some embodiments, the sum of the distance Δ3 between the third coupling surface and the third movable sealing surface on the second straight line and the distance Δ4 between the fourth coupling surface and the fourth movable sealing surface on the second straight line is constant. For example, the sum of the distance Δ3 between the third coupling surface and the third movable sealing surface in the direction of movement of the second valve element and the distance Δ4 between the fourth coupling surface and the fourth movable sealing surface in the direction of movement of the second valve element is always equal to the second displacement S2, i.e., Δ3 + Δ4 = S2. In this way, the first linear drive device can simultaneously control the opening range of the first opening A and the second opening B, and the second linear drive device can simultaneously control the opening range of the third opening C and the fourth opening D, resulting in high controllability.

[0100] As mentioned above, the auxiliary coughing device 001 can control the working state of the auxiliary coughing device 001 by controlling the parameters of the linear translation of the first valve element 201 and / or the parameters of the linear translation of the second valve element 202 to make the valve 002 form different passages.

[0101] Figure 6AThe first position of the first valve element 201 is shown. In the first position, the first valve member 200a closes the first opening A, and the distance between the second valve member 200b and the second opening B on the first straight line L1 is greater than zero to allow fluid passage. Specifically, the first movable sealing surface couples with the first coupling surface to close the first opening, and the distance between the second movable sealing surface and the second coupling surface on the first straight line is greater than zero, causing the second opening to open. In the first position, the second opening B and the outlet port E are in fluid communication with each other.

[0102] Figure 6B The second position of the first valve element 201 is shown. In this second position, the second valve member 200b closes the second opening B, and the distance between the first valve member 200a and the first opening A along the first straight line L1 is greater than zero to allow fluid passage. Specifically, the second movable sealing surface couples with the second coupling surface to close the second opening, and the distance between the first movable sealing surface and the first coupling surface along the first straight line is greater than zero, causing the first opening to open. In this second position, the first opening A and the outlet port E are in fluid communication with each other.

[0103] Figure 6A The fourth position of the second valve element 202 is shown. In this fourth position, the fourth valve member 200d closes the fourth opening D, and the distance between the third valve member 200c and the third opening C on the second straight line L2 is greater than zero to allow fluid passage. Specifically, the fourth movable sealing surface couples with the fourth coupling surface to close the fourth opening, and the distance between the third movable sealing surface and the third coupling surface on the second straight line is greater than zero, causing the third opening to open. In this fourth position, the third opening C and the air inlet port F are in fluid communication with each other.

[0104] Figure 6B The third position of the second valve element 202 is shown. In this third position, the third valve member 200c closes the third opening C, and the distance between the fourth valve member 200d and the fourth opening D on the second straight line L2 is greater than zero to allow fluid passage. Specifically, the third movable sealing surface couples with the third coupling surface to close the third opening, and the distance between the fourth movable sealing surface and the fourth coupling surface on the second straight line is greater than zero, causing the fourth opening to open. In the third position, the fourth opening D and the air inlet port F are in fluid communication with each other.

[0105] refer to Figure 6AIn the first position, valve element 201 is in the first position, with the first opening A completely closed and the second opening B connected to the outlet port E. In the fourth position, valve element 202 is in the fourth position, with the fourth opening D completely closed and the third opening C connected to the inlet port F. It can be seen that when the first valve element 201 is in the first position and the second valve element 202 is in the fourth position, the valve connects the patient interface 820 and the fan inlet 910, and the auxiliary expectoration device 001 generates negative pressure at the patient interface 820. The negative pressure at the fan inlet 910 can be applied to the patient's airway via the outlet port E and the second opening B, and the gas discharged from the fan outlet 920 can be discharged to the atmosphere via the inlet port F and the third opening C.

[0106] refer to Figure 6B The first valve element 201 is in the second position, with the first opening A and the outlet port E connected. The second valve element 202 is in the third position, with the fourth opening D and the inlet port F connected. It can be seen that when the first valve element 201 is in the second position and the second valve element 202 is in the third position, the valve connects the patient interface 820 and the fan outlet 920, and the auxiliary expectoration device 001 generates positive pressure at the patient interface 820. The fan can draw air from the atmosphere through the first opening A and the outlet port E, and the air in the atmosphere flows into the fan inlet 910 through the first opening A and the outlet port E. The positive pressure at the fan outlet 920 can be applied to the patient's airway through the inlet port F and the fourth opening D.

[0107] It should be noted that, Figure 6A and Figure 6B The positions of the discharge stage and the blow-in stage provided according to the embodiments of this application are shown respectively. Those skilled in the art will understand that the first valve element can be in other positions between the first position and the second position, and the second valve element can be in other positions between the third position and the fourth position. It is also possible to enable the auxiliary expectoration device to generate positive or negative airflow at the patient interface 820 without affecting the core spirit of this application.

[0108] In some embodiments, the assisted expectoration device 001 may also superimpose oscillations on the airflow at the patient interface 820. As an example, the oscillations may loosen secretions in the patient's airway.

[0109] The oscillation can be generated by the reciprocating movement of the first valve element and / or the second valve element. For ease of understanding, it is necessary to define "amplitude" in the following description of this application. According to the assisted expectoration device described in this application, "amplitude" refers to the displacement by which the valve element moves from the farthest position in one direction to the farthest position in the opposite direction during the oscillation process.

[0110] In some embodiments, when the first linear drive device drives the first valve element to reciprocate linearly at the first position, the second position, or a position between the first and second positions with a first amplitude H1 less than the first displacement S1, the auxiliary expectoration device superimposes oscillations on the airflow at the patient interface. For example, after the first linear drive device drives the first valve element to a target position, it continues to drive the first valve element to reciprocate around the target position as a reference position, superimposing oscillations on the airflow at the patient interface. As an example, the target position can be the first position, the second position, or any position between the first and second positions.

[0111] In some embodiments, when the second linear drive device drives the second valve element to reciprocate linearly at the third position, the fourth position, or a position between the third and fourth positions with a second amplitude H2 less than the second displacement S2, the auxiliary expectoration device superimposes oscillations on the airflow at the patient interface. For example, after the second linear drive device drives the second valve element to a target position, it continues to drive the second valve element to reciprocate around the target position, superimposing oscillations on the airflow at the patient interface. As an example, the target position can be the third position, the fourth position, or any position between the third and fourth positions.

[0112] In some embodiments, the first valve element and the second valve element reciprocate simultaneously to generate the oscillation.

[0113] As an example, Figure 7A A schematic diagram of a superimposed oscillation according to an embodiment of this application is shown. Figure 7A As shown, the second valve element 202 is in Figure 6A The fourth position shown oscillates between a position slightly closer to the third position, causing variations in the pressure applied to the patient port. Of course, in some embodiments, this can also be achieved by the first valve element 201. Figure 6A The first position oscillates between a position slightly toward the second position, causing the pressure applied to the patient port to change.

[0114] In some embodiments, the first and second lines are parallel and not collinear, such as... Figure 2A-8C As shown. This approach simplifies the valve's structure, optimizes its layout, reduces its size, and improves controllability. However, those skilled in the art will readily understand that in some embodiments, the first and second straight lines may not be parallel (rather than perpendicular), or they may be collinear, without departing from the core spirit of the invention described in this application.

[0115] In some embodiments, the first valve component 200a and the second valve component 200b are perpendicular to the first straight line, and the third valve component 200c and the fourth valve component 200d are perpendicular to the second straight line, such as... Figure 2A As shown. This design maximizes the valve's stress-bearing structure, resulting in a simple structure, small size, and high controllability. However, those skilled in the art will readily understand that in some embodiments, the first valve component 200a and the second valve component 200b may not be perpendicular to the first straight line (e.g., perpendicular to...). Figure 3C (or the valve component corresponding to the opening shown in 3F) without departing from the core spirit of the invention described in this application, the third valve component 200c and the fourth valve component 200d may not be perpendicular to the second straight line (e.g., perpendicular to the second straight line). Figure 3C (or the valve component corresponding to the opening shown in 3F) without departing from the core spirit of the invention described in this application.

[0116] As previously described, the valve seat 100 may include a first coupling surface surrounding the first opening A, a second coupling surface surrounding the second opening B, a third coupling surface surrounding the third opening C, and a fourth coupling surface surrounding the fourth opening D. The first valve component includes a first movable sealing surface that can couple with the first coupling surface to close the first opening; the second valve component includes a second movable sealing surface that can couple with the second coupling surface to close the second opening; the third valve component includes a third movable sealing surface that can couple with the third coupling surface to close the third opening; and the fourth valve component includes a fourth movable sealing surface that can couple with the fourth coupling surface to close the fourth opening. In some embodiments, the first and second movable sealing surfaces are perpendicular to the first straight line, and the third and fourth movable sealing surfaces are perpendicular to the second straight line. This design allows for a better force-bearing structure, simpler structure, smaller size, and higher controllability of the valve. However, those skilled in the art will readily understand that in some embodiments, the first movable sealing surface and the second movable sealing surface may not be perpendicular to the first straight line without departing from the core spirit of the invention described in this application, and the third movable sealing surface and the fourth movable sealing surface may not be perpendicular to the second straight line without departing from the core spirit of the invention described in this application.

[0117] In some embodiments, the first main chamber and the second main chamber are identical in shape and size. This results in high valve controllability, a simpler structure, and lower cost. Of course, those skilled in the art will recognize that in some embodiments, the first main chamber and the second main chamber may have different shapes and / or sizes without departing from the core spirit of this application.

[0118] In some embodiments, the first opening, the second opening, the third opening, and the fourth opening are all identical in shape and size. This results in high valve controllability, a simpler structure, and lower cost. Of course, those skilled in the art will recognize that in some embodiments, the first opening, the second opening, the third opening, and the fourth opening may have different shapes and / or sizes without departing from the core spirit of this application.

[0119] In some embodiments, the first valve component 200a and the second valve component 200b may be selectively disposed within or outside the first main chamber, and the third valve component 200c and the fourth valve component 200d may be selectively disposed within or outside the second main chamber, to provide better controllability of the valve. As an example, Figures 8A-8C Schematic diagrams of three valves provided according to embodiments of this application are shown. (Reference) Figure 8A In some embodiments, the first valve component 200a and the second valve component 200b are both located outside the first main chamber, and the third valve component 200c and the fourth valve component 200d are both located outside the second main chamber. (See reference...) Figure 8B In some embodiments, the first valve component 200a and the second valve component 200b are both outside the first main chamber, and the third valve component 200c and the fourth valve component 200d are both inside the second main chamber. (See reference...) Figure 8C In some embodiments, the first valve component 200a and the second valve component 200b are both located in the first main chamber, and the third valve component 200c and the fourth valve component 200d are both located outside the second main chamber.

[0120] In some embodiments, the first displacement (S1) and the second displacement (S2) are equal. This results in high valve controllability, a simpler structure, and lower cost. Of course, those skilled in the art will recognize that in some embodiments, the first displacement (S1) and the second displacement (S2) may not be equal without departing from the core spirit of this application.

[0121] As previously described, the inner or outer wall surface of the first main chamber in the first straight direction defines the first and second positions, and the inner or outer wall surface of the second main chamber in the second straight direction defines the third and fourth positions. In some embodiments, the height of the first main chamber along the first straight line is not less than 12 mm. In some embodiments, the height of the second main chamber along the second straight line is not less than 12 mm. This achieves a balance between rapid switching and a larger flow rate.

[0122] As previously mentioned, the dimensions of the valve components (200a, 200b, 200c, 200d) must be larger than the dimensions of the openings (A, B, C, D) to allow the openings (A, B, C, D) to be closed. If the width of the main chamber is too small, the gaps (W1 / W2 / W3 / W4) between the valve components and the inner wall of the main chamber will be too small, reducing the size of the flow passage and adversely affecting the switching speed. In some embodiments, to improve the valve's switching and response speed, the width of the first main chamber in the direction perpendicular to the first straight line is not less than 30 mm. Similar to the first main chamber, in some embodiments, the width of the second main chamber in the direction perpendicular to the second straight line is not less than 30 mm; the specific reasons will not be elaborated further.

[0123] The area of ​​the opening affects its flow rate. In some embodiments, to improve the valve's switching speed and response speed, the areas of the first opening, the second opening, the third opening, and / or the fourth opening are not less than 100 mm². 2 .

[0124] This application also provides a valve for an auxiliary expectoration device. The valve may include a first valve element capable of linear translation, a second valve element capable of linear translation, and a valve seat. The valve seat may include a first main chamber and a second main chamber. The first main chamber may include an outlet port (E), a first opening (A), and a second opening (B), wherein one of the first opening (A) and the second opening (B) is connected to the atmosphere, and the other is connected to the patient's airway. The second main chamber may include an inlet port (F), a third opening (C), and a fourth opening (D), wherein one of the third opening (C) and the fourth opening (D) is connected to the atmosphere, and the other is connected to the patient's airway. The auxiliary expectoration device synchronously controls the parameters of the linear translation of the first valve element and the second valve element, further controlling the operating state of the auxiliary expectoration device. The assisted expectoration device synchronously controls the spacing between the first opening and the first valve element in the direction of movement L1 of the first valve element, the spacing between the first opening and the first valve element in the direction of movement L1 of the first valve element, the spacing between the third opening and the second valve element in the direction of movement of the second valve element, and the spacing between the fourth opening and the second valve element in the direction of movement of the second valve element, further controlling the flow direction, flow rate, and / or pressure of the airflow at the patient interface. In some embodiments, the valve may further include a first linear drive device, a second linear drive device, a first additional force application module, and / or a second additional force application module. Detailed descriptions of the valve seat, the first valve element, the second valve element, the first linear drive device, the second linear drive device, the first additional force application module, and / or the second additional force application module can be found above and will not be repeated here.

[0125] The auxiliary expectoration device and valve provided in this application have fast and precise switching, good controllability, fast response speed, good sealing performance, almost zero friction, small size, simple structure, short air path, high safety, and simple operation. They can comprehensively solve many technical problems existing in the prior art.

[0126] In summary, after reading this detailed disclosure, those skilled in the art will understand that the foregoing detailed disclosure is presented by way of example only and is not restrictive. Although not explicitly stated herein, those skilled in the art will understand that this application is intended to encompass various reasonable changes, improvements, and modifications to the embodiments. These changes, improvements, and modifications are intended to be made by this disclosure and are within the spirit and scope of the exemplary embodiments of this disclosure.

[0127] In the description of this disclosure, unless otherwise stated, the term "comprising" and its variations should be understood as open-ended inclusion, i.e., "including but not limited to"; the term "based on" should be understood as "at least partially based on"; and the symbol " / " means "or".

[0128] Furthermore, certain terms used in this application have been used to describe embodiments of this disclosure. For example, "an embodiment," "an embodiment," and / or "some embodiments" mean that a particular feature, structure, or characteristic described in connection with that embodiment may be included in at least one embodiment of this disclosure. Therefore, it is to be emphasized and understood that two or more references to "an embodiment" or "an embodiment" or "alternative embodiment" in various parts of this specification do not necessarily refer to the same embodiment. Moreover, specific features, structures, or characteristics may be suitably combined in one or more embodiments of this disclosure.

[0129] Finally, it should be understood that the embodiments disclosed herein are illustrative of the principles of the embodiments of this application. Other modified embodiments are also within the scope of this application. Therefore, the embodiments disclosed herein are merely examples and not limitations. Those skilled in the art can adopt alternative configurations based on the embodiments in this application to implement the invention of this application. Therefore, the embodiments of this application are not limited to those embodiments precisely described in the application.

Claims

1. An auxiliary expectoration device, characterized in that, include: The fan includes the fan inlet and the fan outlet; Patient interface; as well as The valve includes a valve seat with a cavity structure, a first valve element capable of linear translation, and a second valve element capable of linear translation. The first valve element is linearly translated relative to the valve seat from a first position by a first displacement (S1) to a second position, and the second valve element is linearly translated relative to the valve seat from a third position by a second displacement (S2) to a fourth position. When the first valve element is in the first position and the second valve element is in the fourth position, the valve connects the patient interface to the fan inlet air passage, and the auxiliary expectoration device generates negative pressure at the patient interface. When the first valve element is in the second position and the second valve element is in the third position, the valve connects the patient interface to the fan outlet air passage, and the auxiliary expectoration device generates positive pressure at the patient interface.

2. The assisted expectoration device as described in claim 1, characterized in that: The first valve element and the second valve element are mechanically separated and isolated.

3. The assisted expectoration device as described in claim 1, characterized in that, Also includes: A first linear drive device is configured to drive the first valve element to translate linearly. The second linear drive is configured to drive the second valve element to translate linearly. The first additional force application module can apply a first additional force to the first valve element along the direction of linear translation of the first valve element, which is monotonic with the position of the first valve element; and / or The second additional force application module can apply a second additional force to the second valve element along the direction of linear translation of the second valve element, which is monotonic with the position of the second valve element.

4. The assisted expectoration device as described in claim 1, characterized in that: When the first valve element reciprocates linearly at the first position, the second position, or a position between the first and second positions with a first amplitude less than the first displacement (S1), the auxiliary expectoration device superimposes oscillations on the airflow at the patient interface; and / or When the second valve element reciprocates linearly at the third position, the fourth position, or the position between the third and fourth positions with a second amplitude less than the second displacement (S2), the auxiliary expectoration device oscillates on the airflow at the patient interface.

5. The assisted expectoration device as described in claim 1, characterized in that, The valve seat includes: The first main chamber includes The air outlet (E) is connected to the fan inlet. First opening (A), The second opening (B); and The second main chamber includes The air inlet port (F) is connected to the fan outlet. The third opening (C), Fourth opening (D).

6. The assisted expectoration device as described in claim 5, characterized in that, The first valve element includes a first valve component and a second valve component, the first valve component facing the first opening, and the second valve component facing the second opening. The second valve element includes a third valve component and a fourth valve component, the third valve component facing the third opening, and the fourth valve component facing the fourth opening, wherein: The first valve component and the second valve component are both located outside the first main chamber, and the third valve component and the fourth valve component are both located outside the second main chamber; The first valve component and the second valve component are both located outside the first main chamber, and the third valve component and the fourth valve component are both located inside the second main chamber; The first valve component and the second valve component are both located within the first main chamber, and the third valve component and the fourth valve component are both located outside the second main chamber; or The first valve component and the second valve component are both located in the first main chamber, and the third valve component and the fourth valve component are both located in the second main chamber.

7. The assisted expectoration device as described in claim 6, characterized in that, The valve seat includes a first coupling surface surrounding the first opening, a second coupling surface surrounding the second opening, a third coupling surface surrounding the third opening, and a fourth coupling surface surrounding the fourth opening. The first valve component includes a first movable sealing surface; when the first movable sealing surface is coupled to the first coupling surface, the first valve component closes the first opening; when the first movable sealing surface is disconnected from the first coupling surface, the first opening is opened. The second valve component includes a second movable sealing surface; when the second movable sealing surface is coupled to the second coupling surface, the second valve component closes the second opening; when the second movable sealing surface is disconnected from the second coupling surface, the second opening is opened. The third valve component includes a third movable sealing surface; when the third movable sealing surface is coupled to the third coupling surface, the third valve component closes the third opening; when the third movable sealing surface is disconnected from the third coupling surface, the third opening is opened. The fourth valve component includes a fourth movable sealing surface; when the fourth movable sealing surface is coupled to the fourth coupling surface, the fourth valve component closes the fourth opening; when the fourth movable sealing surface is disconnected from the fourth coupling surface, the fourth opening is opened. The auxiliary expectoration device synchronously controls the spacing (Δ1) between the first coupling surface and the first movable sealing surface in the moving direction of the first valve element, the spacing (Δ2) between the second coupling surface and the second movable sealing surface in the moving direction of the first valve element, the spacing (Δ3) between the third coupling surface and the third movable sealing surface in the moving direction of the second valve element, and the spacing (Δ4) between the fourth coupling surface and the fourth movable sealing surface in the moving direction of the second valve element, further controlling the airflow direction, velocity, and / or pressure at the patient interface.

8. The assisted expectoration device as described in claim 5, characterized in that: The first opening (A) and the second opening (B) are opposite to each other in the direction of movement of the first valve element; and The third opening (C) and the fourth opening (D) are opposite to each other in the direction of movement of the second valve element.

9. The assisted expectoration device as described in claim 5, characterized in that, The valve seat also includes: A first communicating cavity is connected to the first main chamber via the first opening and to the second main chamber via the third opening, wherein the first communicating cavity includes an atmospheric port, and the first communicating cavity is connected to the atmosphere via the atmospheric port; and / or The second connecting cavity is connected to the first main chamber via the second opening and to the second main chamber via the fourth opening. The second connecting cavity includes a patient port, and the patient port is connected to the patient interface via an airway.

10. A valve for an auxiliary expectoration device, characterized in that, The valve includes a valve seat, a first valve element capable of linear translation, and a second valve element capable of linear translation. The valve seat includes a first main chamber and a second main chamber. The first main chamber includes an air outlet (E), a first opening (A), and a second opening (B), wherein one of the first opening (A) and the second opening (B) is connected to the atmosphere, and the other is connected to the patient's airway. The second main chamber includes an air inlet (F), a third opening (C), and a fourth opening (D), wherein one of the third opening (C) and the fourth opening (D) is connected to the atmosphere, and the other is connected to the patient's airway.

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