Expiratory valve assembly and breathing machine

Abstract

The embodiment of the utility model provides an exhalation valve assembly and a breathing machine, and relates to the technical field of breathing machines. The exhalation valve assembly comprises an exhalation valve body, an exhalation valve diaphragm and an airflow stabilizing piece. When a patient exhales, airflow exhaled by the patient flows to the ventilation pipeline through the first connector, the airflow flows to the exhalation valve diaphragm after passing through the airflow stabilizing piece, the exhalation valve diaphragm deforms under the action of the airflow, and therefore the airflow flows to the third connector, and the exhalation valve diaphragm is fixed to the second connector. And the air is exhausted through the expiration pipeline. According to the structure, the airflow stabilizing part is arranged at the end opening of the pipeline, air exhaled by a patient can be rectified, so that exhaled airflow of the patient uniformly and orderly passes through the airflow stabilizing part, vibration of an exhalation valve diaphragm caused by airflow disorder is reduced, the problem of squeal of a breathing machine is solved, and the use experience of the patient is improved.

Description

Technical Field

[0001] The present application relates to the technical field of ventilators, and in particular to an exhalation valve assembly and a ventilator. Background Art

[0002] The main body of the ventilator and the exhalation valve are important components of the ventilator. The exhalation valve is connected to the main body of the ventilator. The exhalation valve has an exhalation end and a diaphragm end. The exhalation end is used to receive the gas exhaled by the patient. The diaphragm end includes an exhalation valve diaphragm sealed at the valve exhaust port. The exhalation pressure of the patient is adjusted by adjusting the deformation of the exhalation valve diaphragm. However, during the deformation process of the exhalation valve diaphragm, the exhalation valve diaphragm may generate noise due to vibration, which is amplified by the exhalation valve pipeline and eventually forms the whistling of the ventilator, thereby affecting the patient's experience. Utility Model Content

[0003] In order to at least overcome the above-mentioned deficiencies in the prior art, the purpose of the present application is to provide an exhalation valve assembly and a ventilator.

[0004] In a first aspect, an embodiment of the present application provides an exhalation valve assembly, the exhalation valve assembly comprising an exhalation valve body, an exhalation valve diaphragm, and an airflow stabilizing member;

[0005] The exhalation valve body comprises a shell, a ventilation pipe located inside the shell, and a first interface, a second interface and a third interface connected by the ventilation pipe;

[0006] The first interface is connected to the breathing mask, and the third interface is connected to the exhalation duct;

[0007] The ventilation pipeline includes a pipeline port located in the second interface, the pipeline port is retracted relative to the second interface, the airflow stabilizing member is arranged at the pipeline port, and the exhalation valve diaphragm is fixed to the second interface.

[0008] In a possible implementation, the first interface and the second interface are arranged opposite to each other, the third interface is arranged between the first interface and the second interface, the central axis of the first interface coincides with the central axis of the second interface, and the central axis of the third interface is perpendicular to the central axes of the first interface and the second interface;

[0009] In the direction of the central axis between the first interface and the second interface, the radius of the ventilation duct gradually increases from the first interface to the second interface.

[0010] In a possible implementation, the central axis of the second interface passes through the geometric center of the airflow smoothing member, and the radius of the airflow smoothing member is the same as the radius of the ventilation duct at the position of the airflow smoothing member.

[0011] In a possible implementation, the pipe port is provided with a U-shaped slot, and the airflow stabilizing member is fixedly connected to the pipe port via the U-shaped slot.

[0012] In a possible implementation, the airflow stabilizing member includes an airflow screen, and the mesh size of the airflow screen is 20 meshes / square inch to 80 meshes / square inch;

[0013] The material of the airflow screen includes stainless steel.

[0014] In a possible implementation, the exhalation valve diaphragm includes a fixing portion, a sealing portion, and a thin film portion located between the fixing portion and the sealing portion;

[0015] The fixing portion is fixed to an outer edge of the second interface, and the thickness of the sealing portion and the fixing portion is greater than the thickness of the film portion.

[0016] In a possible implementation, the sealing portion is provided with a metal sheet, and a projection of the metal sheet on the plane where the airflow smoothing member is located coincides with the airflow smoothing member.

[0017] In a possible implementation, the film portion further includes a plurality of reinforcing ribs arranged at equal intervals, the reinforcing ribs protrude relative to the surface of the film portion, and an extending direction of the reinforcing ribs is the same as a radial direction of the film portion.

[0018] In a possible implementation, the inner wall of the ventilation duct further includes evenly arranged air guiding grooves, and the air guiding grooves are recessed relative to the inner wall of the ventilation duct.

[0019] In a second aspect, an embodiment of the present application further provides a ventilator, comprising any one of the exhalation valve assemblies in the first aspect.

[0020] Based on any one of the above aspects, the exhalation valve assembly and ventilator provided in the embodiments of the present application include an exhalation valve body, an exhalation valve diaphragm, and an airflow stabilizing member. The airflow stabilizing member is arranged at the pipe port, and the exhalation valve diaphragm is fixed to the second interface. When the patient exhales, the airflow exhaled by the patient flows to the ventilation pipe via the first interface, and the airflow flows to the exhalation valve diaphragm after passing through the airflow stabilizing member. The exhalation valve diaphragm is deformed under the action of the airflow, so that the airflow flows to the third interface and is discharged through the exhalation pipe. In the above structure, an airflow stabilizing member is arranged at the pipe port, which can rectify the gas exhaled by the patient, so that the patient's exhaled airflow passes through the airflow stabilizing member evenly and orderly, thereby reducing the vibration of the exhalation valve diaphragm caused by airflow turbulence, solving the whistling problem of the ventilator, and improving the patient's user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A possible structural schematic diagram of an exhalation valve assembly provided in the present application;

[0023] Figure 2 A possible partial structural schematic diagram of an exhalation valve assembly provided in the present application;

[0024] Figure 3 A possible top view of the exhalation valve body provided by the present application;

[0025] Figure 4 A schematic diagram of another possible partial structure of the exhalation valve assembly provided in the present application. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] In the description of this application, it should be noted that the terms "upper", "lower", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0030] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed", "connected", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] It should be noted that, in the absence of conflict, different features in the embodiments of the present application may be combined with each other.

[0032] To solve the problems in the prior art, please refer to Figure 1 The embodiment of the present application provides an exhalation valve assembly 10 , which includes an exhalation valve body 110 , an exhalation valve diaphragm 130 , and an airflow stabilizing member 120 .

[0033] The exhalation valve body 110 includes a shell, a ventilation duct 111 located inside the shell, and a first interface A1, a second interface A2, and a third interface A3 connected by the ventilation duct 111. The first interface A1 is connected to a breathing mask, and the patient can perform respiratory therapy by wearing the breathing mask, and the third interface A3 is connected to the exhalation duct. The ventilation duct 111 includes a pipeline port A21 located in the second interface A2, the pipeline port A21 is retracted relative to the second interface A2, the airflow stabilizing member 120 is arranged at the pipeline port A21, and the exhalation valve diaphragm 130 is fixed to the second interface A2. Specifically, when the patient exhales, the airflow exhaled by the patient flows to the ventilation duct 111 via the first interface A1, and the airflow flows to the exhalation valve diaphragm 130 after passing through the airflow stabilizing member 120. The exhalation valve diaphragm 130 is deformed under the action of the airflow, so that the airflow flows to the third interface A3 and is discharged through the exhalation duct.

[0034] In addition, the exhalation valve assembly 10 may further include an exhalation valve handwheel 140 disposed at the first interface A1, and the exhalation valve assembly 10 can be disassembled through the exhalation valve handwheel 140. Specifically, when the exhalation valve assembly 10 needs to be removed from the ventilator, the exhalation valve handwheel 140 can be rotated counterclockwise until it is taken out, and when the exhalation valve assembly 10 needs to be installed, the exhalation valve handwheel 140 can be rotated clockwise until the exhalation valve assembly 10 is installed on the ventilator.

[0035] In the above structure, an airflow smoothing component 120 is provided at the pipe port A21, which can rectify the gas exhaled by the patient so that the patient's exhaled airflow passes through the airflow smoothing component 120 evenly and orderly, thereby reducing the vibration of the exhalation valve diaphragm 130 caused by airflow turbulence, solving the ventilator howling problem, and improving the patient's user experience.

[0036] For further information, please refer to Figure 2 and Figure 3 , the first interface A1 and the second interface A2 are arranged opposite to each other, the third interface A3 is arranged between the first interface A1 and the second interface A2, the central axis L1 of the first interface A1 coincides with the central axis L2 of the second interface A2, and the central axis L3 of the third interface A3 is perpendicular to the central axis L1 (L2) of the first interface A1 and the second interface A2. In addition, in the central axis direction L1 (L2) of the first interface A1 and the second interface A2, the radius R of the ventilation duct 111 gradually increases from the first interface A1 to the direction of the second interface A2, that is, the ventilation duct 111 is trumpet-shaped. The design of gradually increasing the radius R of the ventilation duct 111 can not only increase the space when the airflow passes through the ventilation duct 111, reduce the resistance of the airflow, and make the patient smoother, but also reduce the turbulence and eddy current of the airflow, and reduce the abnormal vibration of the diaphragm caused by the airflow turbulence.

[0037] For further information, please refer to Figure 4 , the central axis of the second interface A2 passes through the geometric center of the air flow stabilizing member 120, and the radius of the air flow stabilizing member 120 is the same as the radius of the ventilation duct 111 at the location of the air flow stabilizing member 120. Specifically, the third interface A3 may include a first edge close to the first interface A1 and a second edge close to the second interface A2, and the air flow stabilizing member 120 may be located between the first edge and the first interface A1, or between the second edge and the second interface A2. Preferably, the air flow stabilizing member 120 is located between the second edge and the second interface A2. The air flow stabilizing member 120 is arranged at a location with a larger radius of the ventilation duct 111, so as to better rectify the airflow close to the exhalation valve diaphragm 130, reduce the impact of turbulent airflow on the exhalation valve diaphragm 130, and reduce the generation of noise.

[0038] The air flow stabilizing member 120 may be disposed at the pipe port A21 of the ventilation pipe 111, and a U-shaped slot may be disposed at the pipe port A21, and the air flow stabilizing member 120 is embedded in the U-shaped slot and fixedly connected to the pipe port A21 through the U-shaped slot. Alternatively, the air flow stabilizing member 120 and the ventilation pipe 111 may be welded by an ultrasonic machine, and the air flow stabilizing member 120 may be disposed between the second edge and the second interface A2.

[0039] Furthermore, the airflow stabilizing member 120 may include an airflow screen, which allows the airflow to pass through the screen in an orderly manner before acting on the exhalation valve diaphragm 130, thereby avoiding the formation of turbulent airflow in the ventilation duct 111, causing abnormal vibration of the exhalation valve diaphragm 130, reducing noise in the duct, and solving the problem of ventilator whistling. At the same time, the mesh specifications of the airflow screen are 20 mesh / square inch to 80 mesh / square inch. For example, the mesh specifications of the airflow screen include 20 mesh / square inch, 25 mesh / square inch, 30 mesh / square inch, 40 mesh / square inch, 50 mesh / square inch, 60 mesh / square inch, 70 mesh / square inch, 75 mesh / square inch, and 80 mesh / square inch. The specific specifications can be selected according to the structure of the ventilation duct 111. Preferably, the mesh specification of the airflow screen is 60 mesh / square inch. Among them, the airflow stabilizing member 120 can be made of food-grade stainless steel.

[0040] In a possible embodiment, the exhalation valve diaphragm 130 includes a fixed portion, a sealing portion, and a thin film portion located between the fixed portion and the sealing portion, the fixed portion is fixed to the outer edge of the second interface A2, the thickness of the sealing portion and the fixed portion is greater than the thickness of the thin film portion, the sealing portion is provided with a metal sheet, and the projection of the metal sheet on the plane where the airflow smoothing part 120 is located coincides with the airflow smoothing part 120.

[0041] In addition, the film portion further comprises a plurality of reinforcing ribs arranged at equal intervals, the reinforcing ribs protrude relative to the surface of the film portion, and the extending direction of the reinforcing ribs is the same as the radial direction of the film portion.

[0042] In the above structure, under the action of airflow, the film part deforms outward, thereby opening the exhalation channel, so that the airflow can be discharged from the exhalation channel through the third interface A3, and when inhaling, the film part collapses, and the sealing part closes the exhalation duct to prevent gas backflow, thereby achieving one-way exhalation of the exhalation valve. In addition, providing reinforcing ribs on the film part can enhance the toughness of the film part, reduce the deformation of the exhalation valve diaphragm 130, and reduce the whistling caused by the vibration of the diaphragm.

[0043] In another possible embodiment, the inner wall of the ventilation duct 111 also includes evenly arranged air guide grooves, which are recessed relative to the inner wall of the ventilation duct 111. The air guide grooves can guide the airflow to flow along a specific path, reduce the airflow turbulence caused by turbulence in the duct, and thus reduce the vibration noise of the exhalation valve diaphragm 130 caused by the airflow turbulence.

[0044] Based on the same inventive idea, the embodiment of the present application also provides a ventilator, which may include a breathing mask and an exhalation valve assembly 10 connected to the breathing mask. The patient can perform respiratory therapy by wearing the breathing mask, and the exhalation valve assembly 10 is used to achieve one-way exhalation and discharge the airflow exhaled by the patient. Specifically, when the patient exhales, the airflow exhaled by the patient flows to the ventilation pipe 111 via the first interface A1, and the airflow flows to the airflow stabilizing member 120 arranged at the pipe port A21 via the ventilation pipe 111, and flows to the breathing valve diaphragm 130 after being rectified by the airflow stabilizing member 120. Under the action of the airflow, the thin film portion of the breathing valve diaphragm 130 deforms outward, thereby opening the exhalation channel, so that the airflow can be discharged from the exhalation channel via the third interface A3, and when inhaling, the thin film portion collapses, and the sealing portion closes the exhalation pipe to prevent gas reflux, thereby achieving one-way exhalation of the exhalation valve. By using the above-mentioned exhalation valve assembly 10, the gas exhaled by the patient is rectified through the airflow stabilizing component, so that the patient's exhaled airflow passes through the airflow stabilizing component evenly and orderly, which can reduce the vibration of the exhalation valve diaphragm caused by airflow turbulence, solve the problem of ventilator howling, and improve the patient's user experience.

[0045] In summary, the embodiments of the present application provide an exhalation valve assembly and a ventilator, wherein the exhalation valve assembly includes an exhalation valve body, an exhalation valve diaphragm, and an airflow stabilizing member. The airflow stabilizing member is disposed at the pipe port, and the exhalation valve diaphragm is fixed to the second interface. When the patient exhales, the airflow exhaled by the patient flows to the ventilation pipe via the first interface, and the airflow flows to the exhalation valve diaphragm after passing through the airflow stabilizing member. The exhalation valve diaphragm is deformed under the action of the airflow, so that the airflow flows to the third interface and is discharged through the exhalation pipe. In the above structure, an airflow stabilizing member is disposed at the pipe port, which can rectify the gas exhaled by the patient, so that the patient's exhaled airflow passes through the airflow stabilizing member evenly and orderly, thereby reducing the vibration of the exhalation valve diaphragm caused by airflow turbulence, solving the whistling problem of the ventilator, and improving the patient's user experience.

[0046] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An exhalation valve assembly, characterized in that: The exhalation valve assembly comprises an exhalation valve body, an exhalation valve diaphragm and an airflow stabilizing member; The exhalation valve body comprises a shell, a ventilation pipe located inside the shell, and a first interface, a second interface and a third interface connected by the ventilation pipe; The first interface is used to connect to a breathing mask, and the third interface is used to connect to an exhalation duct; The ventilation pipeline includes a pipeline port located in the second interface, the pipeline port is retracted relative to the second interface, the airflow stabilizing member is arranged at the pipeline port, and the exhalation valve diaphragm is fixed to the second interface.

2. The exhalation valve assembly according to claim 1, characterized in that: The first interface and the second interface are arranged opposite to each other, the third interface is arranged between the first interface and the second interface, the central axis of the first interface coincides with the central axis of the second interface, and the central axis of the third interface is perpendicular to the central axes of the first interface and the second interface; In the direction of the central axis between the first interface and the second interface, the radius of the ventilation duct gradually increases from the first interface to the second interface.

3. The exhalation valve assembly according to claim 2, characterized in that: The central axis of the second interface passes through the geometric center of the airflow stabilizing member, and the radius of the airflow stabilizing member is the same as the radius of the ventilation duct where the airflow stabilizing member is set.

4. The exhalation valve assembly according to claim 1, characterized in that: The pipeline port is provided with a U-shaped slot, and the airflow stabilizing member is fixedly connected to the pipeline port via the U-shaped slot.

5. The exhalation valve assembly according to claim 1, characterized in that: The airflow stabilizing member comprises an airflow screen, and the mesh size of the airflow screen is 20 meshes / square inch to 80 meshes / square inch; The material of the airflow screen includes stainless steel.

6. The exhalation valve assembly according to claim 1, characterized in that: The exhalation valve diaphragm comprises a fixing portion, a sealing portion and a thin film portion located between the fixing portion and the sealing portion; The fixing portion is fixed to an outer edge of the second interface, and the thickness of the sealing portion and the fixing portion is greater than the thickness of the film portion.

7. The exhalation valve assembly according to claim 6, characterized in that: The sealing portion is provided with a metal sheet, and a projection of the metal sheet on the plane where the airflow stabilizing member is located coincides with the airflow stabilizing member.

8. The exhalation valve assembly according to claim 6, wherein the thin film portion further comprises a plurality of reinforcing ribs arranged at equal intervals, wherein the reinforcing ribs protrude relative to the surface of the thin film portion, and wherein the extending direction of the reinforcing ribs is the same as the radial direction of the thin film portion.

9. The exhalation valve assembly according to claim 1, characterized in that: The inner wall of the ventilation duct further includes evenly arranged air guiding grooves, and the air guiding grooves are recessed relative to the inner wall of the ventilation duct.

10. A ventilator, characterized in that: The ventilator comprises the exhalation valve assembly according to any one of claims 1 to 9 above.

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