Ventilation valve and sputum drainage system

Abstract

The present application relates to the technical field of medical devices, and provides a ventilation valve and a sputum removal system, wherein the ventilation valve includes a valve seat, a valve core, a fan assembly, and a drive assembly, the valve seat has multiple channels, some of which are connected through the fan assembly, the valve core has a connecting channel, and the valve core of the drive assembly rotates relative to the valve seat to allow multiple channels to have different connection states, thereby realizing the positive and negative pressure conversion of the ventilation valve. Through the different connection states of the ventilation valve, the time of switching and debugging between different devices can be saved, thereby improving the sputum removal efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a ventilation valve and a sputum removal system. Background Art

[0002] Coughing is the body's physiological mechanism for clearing respiratory secretions. For some patients with cough dysfunction, they need to use external breathing equipment to assist breathing while expelling secretions from the respiratory tract.

[0003] In related technologies, airway percussion devices are often used to generate positive pressure airflow. When the patient inhales, the positive pressure airflow acts on the patient's respiratory tract to loosen secretions, and the secretions are coughed out when the patient exhales. For patients with cough dysfunction, a mechanical inhalation ventilator (Mechanical Insufflation Exsufflation, MIE) is needed to generate positive and negative pressures for inhalation and exhalation to help the patient expel secretions during breathing.

[0004] However, when these two devices are used in combination, they often need to be paused for a certain period of time for switching and debugging, which reduces the efficiency of sputum removal. Summary of the invention

[0005] The present application provides a ventilation valve and a sputum removal system, which can improve sputum removal efficiency.

[0006] In order to achieve the above objectives, this application adopts the following technical solutions:

[0007] The present application provides a ventilation valve, comprising:

[0008] The valve seat has a plurality of discretely arranged channels, the plurality of channels include a first channel, a second channel, a third channel and a fourth channel; the valve seat includes a first channel opening, a second channel opening and a third channel opening, the first channel opening and the second channel opening are located on opposite sides of the valve seat along the axial direction of the air exchange valve, and the third channel opening is arranged on the circumferential side of the valve seat; the first channel and the third channel are connected through their respective first channel openings and third channel openings, and the second channel and the fourth channel are connected through their respective first channel openings and second channel openings;

[0009] A valve core is located on one side of the valve seat along the axial direction of the air exchange valve, the valve core is rotatably arranged relative to the valve seat, and the valve core includes a first communication channel and a second communication channel;

[0010] A fan assembly is located on the other side of the valve seat along the axial direction of the ventilation valve, and the fan assembly has a first air port and a second air port that are connected, the first air port is connected to the second channel port of the second channel, and the second air port is connected to the second channel port of the fourth channel;

[0011] A drive assembly is connected to the valve core, and the drive assembly is configured to drive the valve core to rotate relative to the valve seat so that the first connecting channel of the valve core connects to the first channel openings of at least two of the first channel, the second channel, the third channel and the fourth channel, or so that the second connecting channel of the valve core connects to the first channel opening of at least one of the first channel, the second channel, the third channel and the fourth channel.

[0012] As an optional implementation, the first channel openings of each channel are arranged in sequence and spaced apart along the circumference of the ventilation valve.

[0013] As an optional implementation, the number of first channel openings is at least four, the number of second channel openings is at least two, and the number of third channel openings is at least two.

[0014] As an optional implementation, the first communication channel and the second communication channel are both arc-shaped, and both extend along the circumference of the ventilation valve;

[0015] The first communication passage and the second communication passage are concentrically arranged on the valve core.

[0016] As an optional implementation, when each first channel opening is connected to the first communicating channel or the second communicating channel;

[0017] The orthographic projection of each first channel opening on the plane where the corresponding first communicating channel or second communicating channel is located is covered by the corresponding first communicating channel or second communicating channel.

[0018] As an optional implementation, the fan assembly includes a fan and a fan housing, the fan housing is connected to the valve seat, and the first air outlet and the second air outlet are located on a side of the fan housing facing the valve seat;

[0019] The fan housing has a containing cavity, and the fan is located in the containing cavity.

[0020] As an optional implementation, the drive assembly includes a motor, an adapter and a mounting member, the output shaft of the motor is passed through the end of the adapter, and the end of the adapter away from the motor is connected to the valve core;

[0021] The mounting part is partially sleeved on the adapter, and the adapter is rotatably arranged relative to the mounting part.

[0022] As an optional implementation, the end of the adapter facing the motor has a first plug hole, and the output shaft of the motor and the adapter are connected through the first plug hole;

[0023] The cross-sectional profile of the output shaft of the motor is adapted to the profile of the first plug-in hole.

[0024] As an optional implementation, the adapter has a plug-in portion on one side facing the valve core, the valve core has a second plug-in hole, and the plug-in portion is inserted into the second plug-in hole;

[0025] The cross-sectional profile of the plug portion is adapted to the profile of the second plug hole.

[0026] The ventilation valve provided in the present application drives the valve core to rotate relative to the valve seat through a driving assembly, so that multiple channels on the valve seat have different connection states, thereby realizing the transition of different working states. The ventilation valve provided in the present application reduces the switching and debugging time between different devices, thereby improving the sputum removal efficiency.

[0027] In a second aspect, the present application provides a sputum removal system, comprising a controller, a pressure detector, and the ventilation valve of the first aspect;

[0028] The pressure detector is configured to detect the pressure of the third channel port of the first channel;

[0029] The controller is electrically connected to the pressure detector and the ventilation valve respectively.

[0030] The sputum removal system provided in the present application can improve sputum removal efficiency because it includes the ventilation valve in the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 A schematic diagram of a ventilation valve provided in an embodiment of the present application;

[0033] Figure 2 A cross-sectional view of a ventilation valve provided in an embodiment of the present application;

[0034] Figure 3 An exploded diagram of the structure of the ventilation valve provided in the embodiment of the present application;

[0035] Figure 4 A structural diagram of a valve seat in a gas exchange valve provided in an embodiment of the present application;

[0036] Figure 5 A structural diagram of a valve core in a ventilation valve provided in an embodiment of the present application;

[0037] Figure 6 A schematic diagram of a first working state of a ventilation valve provided in an embodiment of the present application;

[0038] Figure 7 A schematic diagram of a second working state of the ventilation valve provided in an embodiment of the present application;

[0039] Figure 8 A schematic diagram of a third working state of the ventilation valve provided in an embodiment of the present application;

[0040] Fig. 9 Schematic diagram of the air flow waveform of the ventilation valve provided in the embodiment of the present application Figure 1 ;

[0041] Fig.10 The fourth working state of the ventilation valve provided in the embodiment of the present application is shown in FIG. Figure 1 ;

[0042] Fig.11 The fourth working state of the ventilation valve provided in the embodiment of the present application is shown in FIG. Figure 2 ;

[0043] Fig.12 The fifth working state of the ventilation valve provided in the embodiment of the present application is shown in FIG. Figure 1 ;

[0044] Fig.13 The fifth working state of the ventilation valve provided in the embodiment of the present application is shown in FIG. Figure 2 ;

[0045] Fig.14 Schematic diagram of the air flow waveform of the ventilation valve provided in the embodiment of the present application Figure 2 ;

[0046] Fig.15 The sixth working state of the ventilation valve provided in the embodiment of the present application is shown in FIG. Figure 1 ;

[0047] Fig.16 The sixth working state of the ventilation valve provided in the embodiment of the present application is shown in FIG. Figure 2 ;

[0048] Fig.17 Schematic diagram of the air flow waveform of the ventilation valve provided in the embodiment of the present application Figure 3 ;

[0049] Fig.18 A structural diagram of a valve cover in a ventilation valve provided in an embodiment of the present application;

[0050] Fig.19 A structural diagram of a connecting member in a ventilation valve provided in an embodiment of the present application;

[0051] Fig. 20 A structural diagram of a fixing plate in a ventilation valve provided in an embodiment of the present application;

[0052] Fig.21 A cross-sectional view of a mounting member in a ventilation valve provided in an embodiment of the present application;

[0053] Fig. 22A structural diagram of an elastic sealing member in a ventilation valve provided in an embodiment of the present application;

[0054] Fig.23 A cross-sectional view of an elastic sealing member in a ventilation valve provided in an embodiment of the present application;

[0055] Fig.24 A schematic diagram of a sputum removal system provided in an embodiment of the present application.

[0056] Description of reference numerals:

[0057] 100-air exchange valve;

[0058] 110-valve seat; 111-first channel opening; 112-second channel opening; 113-third channel opening; 114-first channel; 115-second channel; 116-third channel; 117-fourth channel;

[0059] 120 - valve core; 121 - first communication channel; 122 - second communication channel; 123 - second plug hole;

[0060] 130-valve cover;

[0061] 140-fan assembly; 141-first air outlet; 142-second air outlet; 143-fan; 144-fan housing; 145-pressing plate; 146-supporting member;

[0062] 150-driving assembly;

[0063] 151-motor; 1511-output shaft;

[0064] 152-adapter; 1521-first plug hole; 1522-top screw hole; 1523-plug part; 1524-external thread; 1525-circlip groove;

[0065] 153-fixed sheet; 1531-third plug hole;

[0066] 154-threaded fasteners;

[0067] 155-mounting piece; 1551-bearing mounting groove; 1552-sealing groove;

[0068] 156-bearing;

[0069] 157-elastic seal; 1571-spring; 1572-frame;

[0070] 160-seal ring;

[0071] 200-sputum drainage system; 210-controller; 220-pressure detector. DETAILED DESCRIPTION

[0072] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme 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 of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0073] Coughing is the body's physiological mechanism for clearing respiratory secretions. For some patients with cough dysfunction, they need to use external breathing equipment to assist breathing while expelling secretions from the respiratory tract.

[0074] In related technologies, airway percussion devices are often used to generate positive pressure airflow. When the patient inhales, the positive pressure airflow acts on the patient's respiratory tract to loosen secretions, and the secretions are coughed out when the patient exhales. For patients with cough dysfunction, a mechanical inhalation ventilator (Mechanical Insufflation Exsufflation, MIE) is needed to generate positive and negative pressures for inhalation and exhalation to help the patient expel secretions during breathing.

[0075] However, when these two devices are used in combination, they often need to be paused for a certain period of time for switching and debugging, which reduces the efficiency of sputum removal.

[0076] In order to overcome the defects in the prior art, the present application provides a ventilation valve and a sputum removal system, wherein the ventilation valve includes a valve seat, a valve core, a fan assembly and a drive assembly, the valve seat has multiple channels, some of which are connected through the fan assembly, the valve core has a connecting channel, and the valve core of the drive assembly rotates relative to the valve seat to allow the multiple channels to have different connecting states, thereby realizing the positive and negative pressure conversion of the ventilation valve. The combination of the airway percussion device and the MIE is realized through the different connecting states of the ventilation valve, which saves the time of switching and debugging, thereby improving the sputum removal efficiency.

[0077] The contents of the present application will be described in detail below in conjunction with the accompanying drawings so that those skilled in the art can understand the contents of the present application more clearly and in detail.

[0078] First, see Figure 1-Figure 5 and Fig.18 The present application provides a ventilation valve 100 , including: a valve seat 110 , a valve core 120 , a valve cover 130 , a fan assembly 140 and a drive assembly 150 .

[0079] The valve seat 110 has a plurality of discretely arranged channels, including a first channel 114, a second channel 115, a third channel 116, and a fourth channel 117. The valve seat 110 includes a first channel opening 111, a second channel opening 112, and a third channel opening 113. The first channel opening 111 and the second channel opening 112 are located on opposite sides of the valve seat 110 along the axial direction of the gas exchange valve 100, and the third channel opening 113 is arranged on the circumferential side of the valve seat 110. The first channel 114 and the third channel 116 are communicated through their respective first channel openings 111 and third channel openings 113, and the second channel 115 and the fourth channel 117 are communicated through their respective first channel openings 111 and second channel openings 112.

[0080] The valve core 120 is located at one side of the valve seat 110 along the axial direction of the air exchange valve 100 . The valve core 120 is rotatably arranged relative to the valve seat 110 . The valve core 120 includes a first communication channel 121 and a second communication channel 122 .

[0081] The fan assembly 140 is located on the other side of the valve seat 110 along the axial direction of the ventilation valve 100. The fan assembly 140 has a first air port 141 and a second air port 142 that are connected. The first air port 141 is connected to the second channel port 112 of the second channel 115, and the second air port 142 is connected to the second channel port 112 of the fourth channel 117.

[0082] The drive assembly 150 is connected to the valve core 120, and the drive assembly 150 is configured to drive the valve core 120 to rotate relative to the valve seat 110 so that the first connecting channel 121 of the valve core 120 connects to at least two first channel openings 111 of the first channel 114, the second channel 115, the third channel 116 and the fourth channel 117, or the second connecting channel 122 of the valve core 120 connects to at least one first channel opening 111 of the first channel 114, the second channel 115, the third channel 116 and the fourth channel 117.

[0083] In this way, the valve core 120 is driven to rotate relative to the valve seat 110 by the driving component 150, so that the multiple channels on the valve seat 110 have different connectivity states, thereby realizing the transition of different working states. The setting of the ventilation valve 100 in this application realizes the combination of airway percussion technology and MIE technology, reduces the switching and debugging time between different devices, and thus improves the sputum removal efficiency.

[0084] The specific structure of the ventilation valve 100 and various optional implementations are described in detail below.

[0085] Exemplarily, a plurality of discrete channels are provided on the valve seat 110, that is, the plurality of channels are provided independently of each other, and the channels are not connected to each other on the valve seat 110. Each channel is connected through a channel opening provided on the valve seat 110 to form a flow channel for air.

[0086] Specifically, the channel openings include a first channel opening 111 , a second channel opening 112 and a third channel opening 113 , wherein the first channel opening 111 and the second channel opening 112 are arranged on opposite sides of the valve seat 110 along the axial direction of the ventilation valve 100 , and the third channel opening 113 is arranged on the peripheral side of the valve seat 110 .

[0087] refer to Figure 4 The plurality of channels include a first channel 114, a second channel 115, a third channel 116, and a fourth channel 117. The first channel 114 is connected through the first channel opening 111 of the first channel 114 and the third channel opening 113 of the first channel 114, the second channel 115 is connected through the first channel opening 111 of the second channel 115 and the second channel opening 112 of the second channel 115, the third channel 116 is connected through the first channel opening 111 of the third channel 116 and the third channel opening 113 of the third channel 116, and the fourth channel 117 is connected through the first channel opening 111 of the fourth channel 117 and the second channel opening 112 of the fourth channel 117. The second channel 115 and the fourth channel 117 penetrate the opposite sides of the valve seat 110 along the axial direction of the air exchange valve 100. The corresponding second channel 115 and the fourth channel 117 can be formed by providing a through hole structure on the valve seat 110; in addition, the corresponding first channel 114 and the third channel 116 can be formed by providing a combination of a blind hole and a through hole on the valve seat 110, which not only facilitates the processing of the valve seat 110, but also reduces the space occupied by the valve seat 110, so that the overall structure of the air exchange valve 100 is more compact. Furthermore, the arrangement of the hole-shaped structure of each channel facilitates the disassembly and maintenance of the air exchange valve 100.

[0088] It should be noted that the third channel opening 113 of the first channel 114 and the third channel opening 113 of the third channel 116 may be located on adjacent peripheral side walls or opposite peripheral side walls of the valve seat 110, and this section does not make specific requirements for this.

[0089] Of course, for the first channel 114 and the third channel 117, the respective third channel openings 113 may also be located on the same side of the valve seat 110 as the second channel opening 112 on the valve seat 110. The embodiment of the present application does not require the specific position of the third channel opening 113, and only needs to ensure that the first channel 114 is connected to the third channel opening 113 of the first channel 114 through the first channel opening 111 of the first channel 114, and the third channel 116 is connected to the third channel opening 113 of the third channel 116 through the first channel opening 111 of the third channel 116.

[0090] Combination Figure 1-Figure 5 The valve core 120 can be arranged on one side of the valve seat 110. Specifically, the valve core 120 and the first channel opening 111 on the valve seat 110 are arranged opposite to each other. The valve core 120 is arranged to rotate relative to the valve seat 110, so that the first communication channel 121 and the second communication channel 122 on the valve core 120 are respectively connected to a part of the number of channels, thereby forming a plurality of different gas flow paths.

[0091] In order to improve the sealing performance of the ventilation valve 100, the ventilation valve 100 in the embodiment of the present application further includes a valve cover 130. The valve cover 130 is located on the side of the valve core 120 away from the valve seat 110, and is connected to the valve seat 110. In some embodiments, a sealing ring 160 is provided between the valve cover 130 and the valve seat 110, and the sealing performance between the valve cover 130 and the valve seat 110 is improved by abutting the sealing ring 160 and the valve cover 130 and the valve seat 110, so as to reduce air leakage, so as to stabilize the operation of the ventilation valve 100, thereby improving the sputum removal efficiency. It is not difficult to understand that the valve cover 130 and the valve seat 110 can be connected by a threaded fastener 154 to keep the valve cover 130 and the valve seat 110 stable and reliable.

[0092] The fan assembly 140 is located on the side of the valve seat 110 away from the valve cover 130. The fan assembly 140 has a first air port 141 and a second air port 142 that are connected. The first air port 141 is connected to the second channel port 112 of the second channel 115, and the second air port 142 is connected to the second channel port 112 of the fourth channel 117. In this way, when the valve core 120 rotates relative to the valve seat 110, different connection states between the multiple channels are realized through the cooperation of the valve core 120 and the valve seat 110, and the flow direction of the gas in each channel is changed under the action of the fan assembly 140.

[0093] In some embodiments, the fan assembly 140 can form a flow pressure of the gas, thereby changing the flow direction of the gas in each channel during the use of the ventilation valve 100.

[0094] Further, in order to facilitate driving and controlling the rotation of the valve core 120 relative to the valve seat 110, the driving assembly 150 is disposed on the valve cover 130, and the driving assembly 150 is connected to the valve core 120, and the driving assembly 150 outputs a rotational torque to drive the valve core 120 to rotate relative to the valve seat 110. In this way, during the rotation process, the first communication channel 121 of the valve core 120 communicates with at least two of the first channel 114, the second channel 115, the third channel 116, and the fourth channel 117, or the second communication channel 122 of the valve core 120 communicates with at least one of the first channel 114, the second channel 115, the third channel 116, and the fourth channel 117. In this way, the ventilation valve 100 has different working states and realizes the combination of airway percussion technology and MIE technology. That is to say, the ventilation valve 100 has a variety of different working states. The transition of the common working state can be quickly completed only by adjusting the rotation of the valve core 120 of the ventilation valve 100 relative to the valve seat 110, thereby reducing the debugging time of the equipment and improving the sputum removal efficiency.

[0095] Combine the following Figure 6-Figure 16 , different working states of the ventilation valve 100 are described. It should be noted that this section is described in conjunction with a specific application scenario of the ventilation valve 100. Among them, the valve core 120 rotates counterclockwise relative to the valve seat 110, the third channel port 113 of the first channel 114 can be connected to the patient's endotracheal tube through a connector, and the third channel port 113 of the third channel 116 can be used as a free end for gas flow. The connector can be a pipe fitting or a pipe joint, and no specific requirements are made for this.

[0096] First working state, see Figure 6 , the first connecting channel 121 connects the first channel opening 111 of the first channel 114 and the first channel opening 111 of the fourth channel 117, and the second connecting channel 122 connects the first channel opening 111 of the second channel 115 and the first channel opening 111 of the third channel 116. During the patient's inhalation, the fan assembly 140 inhales the air outside the ventilation valve 100 from the third channel opening 113 of the third channel 116, and passes it to the patient from the third channel opening 113 of the first channel 114. In this process, the air flow path is: third channel 116-second connecting channel 122-second channel 115-fan assembly 140-fourth channel 117-first connecting channel 121-first channel 114. In this way, positive pressure airflow can be provided to the patient during the patient's inhalation, which helps to loosen the secretions (sputum) in the respiratory tract, so that the patient can expel the secretions when coughing and exhaling.

[0097] Second working state, see Figure 7, the first connecting channel 121 connects the first channel opening 111 of the third channel 116 and the first channel opening 111 of the fourth channel 117, and the second connecting channel 122 connects the first channel opening 111 of the first channel 114 and the first channel opening 111 of the second channel 115. During the patient's exhalation, the fan assembly 140 inhales the air exhaled by the patient from the third channel opening 113 of the first channel 114 and discharges it from the third channel opening 113 of the third channel 116. In this process, the air flow path is: first channel 114-second connecting channel 122-second channel 115-fan assembly 140-fourth channel 117-first connecting channel 121-third channel 116. In this way, a negative pressure airflow can be provided to the patient during the patient's exhalation, which helps the patient to discharge the secretion (sputum) during the exhalation process.

[0098] The third working state, see Figure 8 , the first connecting channel 121 connects the first channel opening 111 of the second channel 115, the first channel opening 111 of the third channel 116 and the first channel opening 111 of the fourth channel 117, and the second connecting channel 122 connects the first channel opening 111 of the first channel 114. It can be understood that in the third working state, there is no gas flow in the third channel opening 113 of the first channel 114, and there is gas flow in the third channel opening 113 of the third channel 116 under the action of the fan assembly 140. At this time, the air flow path is: the third channel 116-the second connecting channel 122-the second channel 115-the fan assembly 140, and the air flows in a self-circulating manner in the flow path. In this way, it is also possible to prevent the fan assembly 140 from being suffocated and thus causing damage to the fan assembly 140, thereby extending the service life of the fan.

[0099] In this way, the first working state and the second working state form the working state of MIE. On this basis, the ventilation valve 100 in the present application also has a third working state, see Fig. 9 During the patient's breathing process, the first working state, the second working state and the third working state are all selectable, and in the process of cyclic working, it helps the patient to discharge the secretions (sputum) in the respiratory tract. In addition, this working state is more in line with the human body's breathing law and the physiological mechanism of autonomous coughing, which improves comfort.

[0100] Furthermore, during the patient's breathing process, the opening and closing degree of each channel is adjusted to control the flow pressure of the airflow, so as to more effectively loosen and discharge the secretions (sputum) in the respiratory tract, and generate air oscillations during the patient's breathing process, thereby improving the patient's comfort.

[0101] The fourth working state and the fifth working state are described below with reference to the accompanying drawings.

[0102] Fourth working state, see Fig.10 , Fig.11 and Fig.14 It can be understood that the reciprocating rotation of the valve core 120 relative to the valve seat 110 changes the opening and closing degree between the second communication channel 122 and the first channel opening 111 of the third channel 116, thereby controlling the flow rate of the air sucked from the third channel opening 113 of the third channel 116. The air flow path is still: the third channel 116-the second communication channel 122-the second channel 115-the fan assembly 140-the fourth channel 117-the first communication channel 121-the first channel 114.

[0103] When the valve core 120 reciprocates, the opening and closing degree between the second connecting channel 122 and the first channel opening 111 of the third channel 116 changes reciprocally, and then during the patient's inhalation, positive pressure airflow oscillation is formed in the respiratory tract, which is more conducive to loosening secretions in the respiratory tract and can also improve the patient's comfort when inhaling.

[0104] It should be noted that the arc of the valve core 120 in this part reciprocatingly rotates relative to the valve core 120 is π / 10. In the fourth working state, the pressure oscillation amplitude of the airflow is: ±10cmH2O, and the airflow pressure oscillation frequency is 0-20Hz.

[0105] Fifth working state, see Fig.12 , Fig.13 and Fig.14 It can be understood that the reciprocating rotation of the valve core 120 relative to the valve seat 110 changes the opening and closing degree between the second communication channel 122 and the first channel opening 111 of the first channel 114, thereby controlling the flow rate of the exhaled air from the third channel opening 113 of the first channel 114. The air flow path is still: first channel 114-second communication channel 122-second channel 115-blower assembly 140-fourth channel 117-first communication channel 121-third channel 116.

[0106] When the valve core 120 reciprocates, the opening and closing degree between the second connecting channel 122 and the first channel opening 111 of the first channel 114 changes reciprocally, and then during the patient's exhalation, negative pressure airflow oscillation is formed in the respiratory tract, which is more conducive to the discharge of secretions in the respiratory tract and can also improve the patient's comfort during exhalation.

[0107] It should be noted that the arc of the valve core 120 in this part reciprocating relative to the valve core 120 is π / 10. In the fifth working state, the pressure oscillation amplitude of the airflow is: ±10cmH2O, and the airflow pressure oscillation frequency is 0-20Hz.

[0108] The sixth working state, see Figure 15-17, the valve core 120 rotates relative to the valve seat 110, so that the communication relationship between the second communication channel 122 and the first channel opening 111 of the third channel 116 changes. When the third channel 116 and the second communication channel 122 are connected, the air flow path is: third channel 116-second communication channel 122-second channel 115-blower assembly 140-fourth channel 117-first communication channel 121-first channel 114. It is not difficult to understand that when the third channel 116 and the second communication channel 122 are not connected, no air flows in the ventilation valve 100.

[0109] Furthermore, the valve core 120 reciprocates relative to the valve seat 110, and the third channel 116 and the second connecting channel 122 are cyclically switched between the connected and disconnected states, and the positive pressure oscillation of the airflow accompanies the patient's inhalation, so as to better help the patient to loosen the secretions (sputum) in the respiratory tract. The patient can expel the sputum smoothly by coughing.

[0110] It can be understood that in the sixth working state, the arc of the valve core 120 reciprocating relative to the valve core 120 is The pressure oscillation amplitude of the airflow can be: 0-70cmH2O, and the airflow pressure oscillation frequency is 0-10Hz.

[0111] It should be noted that the six working states described in the embodiment of the present application can be converted into each other through the control of the drive component 150, thereby reducing the replacement and debugging time between different devices to improve the efficiency of sputum removal.

[0112] It should be noted that in the above six working states of the ventilation valve 100 provided in the present application, the third channel port 113 of the first channel 114 is always connected to the patient's endotracheal tube, and the third channel port 113 of the third channel 116 is always a free end. In this way, after the ventilation valve 100 is installed for the first time, there is no need to adjust the connection method between the patient and the equipment. The above six working states can be switched only by rotating the valve core 120 relative to the valve seat 110, thereby improving the sputum discharge efficiency.

[0113] The researchers obtained Table 1 through experiments and proved that the use of the ventilation valve 100 provided in this application can improve the efficiency of sputum removal.

[0114] Table 1 Test results

[0115]

[0116] Among them, the experimental group used the ventilation valve 100 provided by the present application, and the control group used the airway percussion device and MIE. The use time of the control group is: the use time of the airway percussion device is 10 minutes, and the use time of MIE is 15 minutes. Correspondingly, the working time of the ventilation valve 100 in the sixth working state is 10 minutes, and the working time in the first working state to the fifth working state is 15 minutes. It can be seen from Table 1 that the use of the ventilation valve 100 provided by the present application can significantly reduce the debugging time, increase the sputum discharge volume, and thus improve the sputum discharge efficiency.

[0117] In some embodiments, the first channel openings 111 of each channel are sequentially spaced along the circumference of the ventilation valve 100. In this way, each channel is connected through the first channel openings 111 located in the same plane, which can optimize the flow path of the airflow and make the ventilation valve 100 compact.

[0118] It should be noted that the shape of the first channel openings 111 may be circular, and the centers of the first channel openings 111 are on the same circumference, and the arc between the centers of two adjacent first channel openings 111 is π / 2, that is, the plurality of first channel openings 111 are evenly distributed in the same plane of the valve seat 110. Of course, the angles between adjacent first channel openings 111 may not be the same, and this section does not make specific requirements on the size of the angles between adjacent first channel openings 111.

[0119] It is not difficult to understand that there are four first channel openings 111 in the embodiment of the present application, and the first channel 114, the second channel 115, the third channel 116 and the fourth channel 117 each correspond to a first channel opening 111. There are two second channel openings 112, wherein the second channel 115 and the fourth channel 117 each correspond to a second channel opening 112. There are two third channel openings 113, and the first channel 114 and the third channel 116 each correspond to a third channel opening 113. In this way, the channels are connected through the channel openings, and the simplified design of the channels is facilitated, reducing the difficulty of producing the valve seat 110. In addition, the simple design of the channels can also reduce the space occupied by the valve seat 110, and the overall structure of the air exchange valve 100 is more compact.

[0120] Of course, the first channel 114, the second channel 115, the third channel 116 and the fourth channel 117 may each correspond to multiple first channel openings 111, for example, two or three, etc., and it is still necessary to ensure that the first channel opening 111 of each channel is connected to the corresponding channel. This section does not make specific requirements on the number of first channel openings 111. Similarly, the number of second channel openings 112 corresponding to each of the second channel 115 and the fourth channel 117 may also be multiple, and the number of third channel openings 113 corresponding to each of the first channel 114 and the third channel 116 may also be multiple. The structure and function of the multiple second channel openings 112 and the multiple third channel openings 113 are the same as those of the multiple first channel openings 111, and this section will not repeat them.

[0121] Optionally, the first communication channel 121 and the second communication channel 122 are both arc-shaped and extend along the circumference of the ventilation valve 100; the first communication channel 121 and the second communication channel 122 are concentrically arranged on the valve core 120. The concentrically arranged arc-shaped channel design can simplify the manufacturing process of the valve core 120, making the processing and assembly of the valve core 120 more convenient and accurate.

[0122] It should be noted that the first connecting channel 121 and the second connecting channel 122 may be a groove structure or a pipe structure, and this section does not make specific requirements for this. The arc of the first connecting channel 121 extending along the circumference of the ventilation valve 100 may be: The arc of the second communication channel 122 extending along the circumferential direction of the ventilation valve 100 may be: .

[0123] In some embodiments, see Figure 1-Figure 3 The fan assembly 140 includes a fan 143 and a fan housing 144. The fan housing 144 is connected to the valve seat 110. The first air port 141 and the second air port 142 are located on the side of the fan housing 144 facing the valve seat 110. The fan housing 144 has a receiving cavity, and the fan 143 is located in the receiving cavity. In this way, the rotation of the fan 143 realizes the driving of the air flow direction of the ventilation valve 100 in different working states, while improving the smoothness of air flow.

[0124] It should be noted that the fan housing 144 is connected to the valve seat 110, the first air port 141 on the fan housing 144 is sealed to the second channel port 112 of the second channel 115 on the valve seat 110, and the second air port 142 on the fan housing 144 is sealed to the second channel port 112 of the fourth channel 117 on the valve seat 110, so as to improve the sealing performance between the fan housing 144 and the valve seat 110, prevent the ventilation valve 100 from releasing pressure during operation, and ensure the stable operation of the ventilation valve 100. At the same time, the operating power consumption of the fan assembly 140 can be reduced, the service life of the fan assembly 140 can be extended, the utilization rate of the fan assembly 140 can be improved, the failure rate of the ventilation valve 100 can be reduced, and the maintenance cost can be saved.

[0125] In order to stabilize the connection between the fan housing 144 and the fan 143 on the valve seat 110 , a pressure plate 145 is disposed on a side of the fan housing 144 facing away from the valve seat 110 , and a support member 146 is connected between the pressure plate 145 and the valve seat 110 .

[0126] Optional, see Figure 1-Figure 3 The driving assembly 150 includes a motor 151 and an adapter 152. The output shaft 1511 of the motor 151 is passed through the end of the adapter 152. The adapter 152 is passed through the valve cover 130. The end of the adapter 152 away from the motor 151 is connected to the valve core 120. In this way, the output shaft 1511 of the motor 151 rotates, and the valve core 120 rotates relative to the valve seat 110 through the connection between the adapter 152 and the valve core 120.

[0127] For further information, see Fig.19 The end of the adapter 152 facing the motor 151 has a first plug hole 1521, and the output shaft 1511 of the motor 151 and the adapter 152 are connected through the first plug hole 1521; the cross-sectional profile of the output shaft 1511 of the motor 151 is adapted to the profile of the first plug hole 1521. In this way, the phenomenon of slipping and idling between the output shaft 1511 of the motor 151 and the adapter 152 can be effectively prevented.

[0128] In addition, a top screw hole 1522 is provided on the adapter 152, and the top screw cooperates with the output extension shaft of the motor 151 in the first plug hole 1521 through the top screw hole 1522, further reducing the probability of idling of the output shaft 1511 of the motor 151 and improving the working stability of the ventilation valve 100.

[0129] It should be noted that the cross-sectional profiles of the first plug hole 1521 and the output shaft 1511 of the motor 151 are adapted to each other, and both may be D-shaped holes, or polygonal holes, etc. This section does not make specific requirements for this.

[0130] Specifically, the adapter 152 has a plug-in portion 1523 on one side facing the valve core 120 , the valve core 120 has a second plug-in hole 123 , and the plug-in portion 1523 is inserted into the second plug-in hole 123 ; the cross-sectional profile of the plug-in portion 1523 is adapted to the profile of the second plug-in hole 123 .

[0131] See also Figure 5 , Fig.19 The end of the valve core 120 facing the adapter 152 forms a plug-in portion 1523, and the cross-sectional profile of the plug-in portion 1523 can be a square. Correspondingly, the valve core 120 has a second plug-in hole 123, and the cross-sectional profile of the second plug-in hole 123 is also a square. The shapes of the plug-in portion 1523 and the second plug-in hole 123 are adapted to each other. In this way, the adapter 152 and the valve core 120 are connected through the plug-in portion 1523 and the second plug-in hole 123, which can prevent the adapter 152 from idling, thereby ensuring the rotation of the valve core 120.

[0132] Further, combined with Figure 2 , Figure 3 , Figure 5 , Fig.19 , Fig. 20 The fixing plate 153 is arranged on the side of the valve core 120 facing the valve seat 110, and is arranged corresponding to the second plug hole 123. The fixing plate 153 abuts against the valve core 120 at the second plug hole 123. The fixing plate 153 has a third plug hole 1531. The plug-in portion 1523 of the adapter 152 is inserted into the third plug hole 1531. The plug-in portion 1523 has an external thread 1524. In this way, the threaded fastener 154 and the external thread 1524 of the plug-in portion 1523 are connected to keep the fixing plate 153 and the valve core 120 abutted, and limit the adapter 152 to prevent the rotating part from moving along the axial direction of the ventilation valve 100, so that the overall connection of the ventilation valve 100 is stable.

[0133] It should be noted that the profile of the third plug hole 1531 on the fixing plate 153 is adapted to the cross-sectional profile of the plug portion 1523 , so as to further reduce the idling of the adapter 152 .

[0134] Optional, combined Figure 1-Figure 3 , Fig.21 The driving assembly 150 further includes a mounting member 155, which is partially inserted into the valve cover 130 and fixedly connected to the valve cover 130; the mounting member 155 is partially sleeved on the adapter 152, and the adapter 152 is rotatably arranged relative to the mounting member 155. In this way, the vibration of the output shaft 1511 of the motor 151 is reduced by the arrangement of the mounting member 155, and the stability of the air exchange valve 100 is further improved.

[0135] During the specific implementation, part of the shaft section of the adapter 152 is located in the mounting member 155, and a bearing 156 may be provided on the adapter 152. The inner ring of the bearing 156 is sleeved on the adapter 152, and a bearing mounting groove 1551 is provided on the inner wall of the mounting member 155 facing the adapter 152, and the outer ring of the bearing 156 is located in the bearing mounting groove 1551. In this way, through the setting of the bearing 156, the rotation of the adapter 152 relative to the mounting member 155 is realized, and at the same time, the contact area between the rotating member and the mounting member 155 is reduced, thereby reducing the friction of the adapter 152, reducing the wear of the adapter 152 and the mounting member 155, and improving the service life of the ventilation valve 100.

[0136] Further, combined with Figure 2 , Figure 3 , Figure 21-23 The mounting member 155 is provided with a sealing groove 1552, and the adapter 152 is sleeved with an elastic sealing member 157, the lip of the elastic sealing member 157 faces the valve core 120, and the elastic sealing member 157 is located in the sealing groove 1552, and one side of the lip of the elastic sealing member 157 abuts against the sealing groove 1552, and the other side of the lip abuts against the adapter 152, so that the sealing connection between the adapter 152 and the mounting member 155 is achieved. In addition, the spring 1571 in the elastic sealing member 157 can provide elastic compensation, so that the elastic sealing member 157 can be stably abutted between the adapter 152 and the mounting member 155, further improving the sealing performance.

[0137] It should be noted that the frame 1572 of the elastic seal 157 is made of polytetrafluoroethylene, which has a low friction coefficient, and can meet the rotational sealing performance between the adapter 152 and the mounting member 155 without affecting the rotation between the adapter 152 and the mounting member 155 .

[0138] A retaining ring groove 1525 is also provided on the adapter 152, and a retaining ring is installed in the retaining ring groove 1525. The retaining ring abuts against the inner ring of the bearing 156, which effectively prevents the inner ring of the bearing 156 from moving along the axial direction of the ventilation valve 100, thereby improving the stability of the ventilation valve 100.

[0139] Optionally, when each first channel opening 111 is connected to the first communication channel 121 or the second communication channel 122, the orthographic projection of the first channel opening 111 on the plane where the corresponding first communication channel 121 or the second communication channel 122 is located is covered by the corresponding first communication channel 121 or the second communication channel 122. It is not difficult to understand that the first channel opening 111 is located in the corresponding first communication channel 121 and the second communication channel 122, so as to prevent airflow pressure release.

[0140] Specific, combined Figure 4 and Figure 6In the first working state, the first communication channel 121 communicates with the first channel opening 111 of the first channel 114 and the first channel opening 111 of the fourth channel 117, and the orthographic projections of the first channel opening 111 of the first channel 114 and the first channel opening 111 of the fourth channel 117 on the plane where the first communication channel 121 is located are completely covered by the first communication channel 121. The second communication channel 122 communicates with the first channel opening 111 of the second channel 115 and the first channel opening 111 of the third channel 116, and the orthographic projections of the first channel opening 111 of the second channel 115 and the first channel opening 111 of the third channel 116 on the plane where the second communication channel 122 is located are completely covered by the second communication channel 122.

[0141] Combination Figure 4 and Figure 7 In the second working state, the first communication channel 121 communicates with the first channel opening 111 of the third channel 116 and the first channel opening 111 of the fourth channel 117, and the orthographic projections of the first channel opening 111 of the third channel 116 and the first channel opening 111 of the fourth channel 117 on the plane where the first communication channel 121 is located are completely covered by the first communication channel 121. The second communication channel 122 communicates with the first channel opening 111 of the first channel 114 and the first channel opening 111 of the second channel 115, and the orthographic projections of the first channel opening 111 of the first channel 114 and the first channel opening 111 of the second channel 115 on the plane where the second communication channel 122 is located are completely covered by the second communication channel 122.

[0142] Combination Figure 4 and Figure 8 In the third working state, the first communication channel 121 communicates with the first channel opening 111 of the second channel 115, the first channel opening 111 of the third channel 116, and the first channel opening 111 of the fourth channel 117, and the orthographic projections of the first channel openings 111 of the second channel 115, the first channel openings 111 of the third channel 116, and the first channel openings 111 of the fourth channel 117 on the plane where the first communication channel 121 is located are completely covered by the first communication channel 121. The second communication channel 122 communicates with the first channel opening 111 of the first channel 114, and the orthographic projections of the first channel opening 111 of the first channel 114 on the second communication channel 122 are completely covered by the second communication channel 122.

[0143] Combination Figure 4 , Fig.10 , Fig.11In the fourth working state, the first communication channel 121 always communicates with the first channel opening 111 of the first channel 114 and the first channel opening 111 of the fourth channel 117, and the orthographic projections of the first channel opening 111 of the first channel 114 and the first channel opening 111 of the fourth channel 117 on the plane where the first communication channel 121 is located are always completely covered by the first communication channel 121. The second communication channel 122 communicates with the first channel opening 111 of the second channel 115 and the first channel opening 111 of the third channel 116, and the communication opening between the first channel opening 111 of the third channel 116 and the second communication channel 122 changes back and forth. Among them, the orthographic projection of the first channel opening 111 of the second channel 115 on the plane where the second communication channel 122 is located is always completely covered by the second communication channel 122, and the orthographic projection of the first channel opening 111 of the third channel 116 on the plane where the second communication channel 122 is located is partially covered by the second communication channel 122, and the covering area changes as the valve core 120 and the valve seat 110 rotate between them.

[0144] Combination Figure 4 , Fig.12 , Fig.13 In the fourth working state, the first communication channel 121 is always connected to the first channel opening 111 of the third channel 116 and the first channel opening 111 of the fourth channel 117, and the orthographic projections of the first channel openings 111 of the third channel 116 and the first channel openings 111 of the fourth channel 117 on the plane where the first communication channel 121 is located are always completely covered by the first communication channel 121. The second communication channel 122 is connected to the first channel opening 111 of the first channel 114 and the first channel opening 111 of the second channel 115, and the communication opening between the first channel opening 111 of the first channel 114 and the second communication channel 122 changes back and forth. Among them, the orthographic projection of the first channel opening 111 of the second channel 115 on the plane where the second communication channel 122 is located is always completely covered by the second communication channel 122. The orthographic projection of the first channel opening 111 of the first channel 114 on the plane where the second communication channel 122 is located is partially covered by the second communication channel 122, and the covering area changes as the valve core 120 and the valve seat 110 rotate.

[0145] Second, see Fig.24 The present application may also provide a sputum removal system 200, comprising a controller 210, a pressure detector 220 and the ventilation valve 100 provided in the first aspect; the pressure detector 220 is configured to detect the pressure of the third channel port 113 of the first channel 114; the controller 210 is electrically connected to the pressure detector 220 and the ventilation valve 100, respectively.

[0146] It is not difficult to understand that the pressure detector 220 is used to detect the pressure of the third channel port 113 of the first channel 114 and feed back the detection value to the controller 210. The controller 210 responds to the feedback signal of the pressure detector 220 and controls the start and stop and speed of the fan assembly 140 in the ventilation valve 100, the start and stop position, speed and direction of the motor 151, so that the ventilation valve 100 can be switched between different working states, thereby reducing the debugging time and improving the sputum removal efficiency.

[0147] It should be noted that the phrases "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include certain features, structures or characteristics, but not every embodiment may include the certain features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing certain features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments, whether explicitly or not explicitly described.

[0148] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0149] It should be easily understood that the terms “on,” “above,” and “over” in this application should be interpreted in the broadest manner, so that “on” means not only “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” includes not only the meaning of “above something” or “over,” but also may include the meaning of “above something” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0150] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90° or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0151] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A ventilation valve (100), characterized in that: include: A valve seat (110) having a plurality of discretely arranged channels, the plurality of channels comprising a first channel (114), a second channel (115), a third channel (116) and a fourth channel (117); the valve seat (110) comprising at least four first channel openings (111), at least two second channel openings (112), and at least two third channel openings (113), the first channel openings (111) being arranged in sequence along the circumference of the ventilation valve (100), the first channel openings (111) and the third channel openings (113) being arranged in sequence along the circumference of the ventilation valve (100), The second channel opening (112) is located on opposite sides of the valve seat (110) along the axial direction of the ventilation valve (100), and the third channel opening (113) is arranged on the peripheral side of the valve seat (110); the first channel (114) and the third channel (116) are connected through their respective first channel openings (111) and the third channel openings (113), and the second channel (115) and the fourth channel (117) are connected through their respective first channel openings (111) and the second channel openings (112); The valve core (120) is located on one side of the valve seat (110) along the axial direction of the air exchange valve (100). The valve core (120) is rotatably arranged relative to the valve seat (110). The valve core (120) comprises a first communication channel (121) and a second communication channel (122). The first communication channel (121) and the second communication channel (122) are both arc-shaped and extend along the circumference of the air exchange valve (100). The first communication channel (121) and the second communication channel (122) are concentrically arranged on the valve core (120), and the arc of the first communication channel (121) extending along the circumference of the air exchange valve (100) is The arc of the second connecting channel (122) extending along the circumference of the ventilation valve (100) is ; a fan assembly (140) located on the other side of the valve seat (110) along the axial direction of the ventilation valve (100), the fan assembly (140) having a first air port (141) and a second air port (142) that are connected to each other, the first air port (141) being connected to the second channel port (112) of the second channel (115), and the second air port (142) being connected to the second channel port (112) of the fourth channel (117); A drive assembly (150), the drive assembly (150) being connected to the valve core (120), the drive assembly (150) being configured to drive the valve core (120) to rotate relative to the valve seat (110), so that the first communication channel (121) of the valve core (120) is connected to at least two first channel openings (111) of the first channel (114), the second channel (115), the third channel (116) and the fourth channel (117), or so that the second communication channel (122) of the valve core (120) is connected to at least one first channel opening (111) of the first channel (114), the second channel (115), the third channel (116) and the fourth channel (117).

2. The ventilation valve (100) according to claim 1, characterized in that: When each of the first channel openings (111) is connected to the first connecting channel (121) or the second connecting channel (122); The orthographic projection of each first channel opening (111) on the plane where the corresponding first connecting channel (121) or the second connecting channel (122) is located is covered by the corresponding first connecting channel (121) or the second connecting channel (122).

3. The ventilation valve (100) according to claim 1, characterized in that: The fan assembly (140) comprises a fan (143) and a fan housing (144); the fan housing (144) is connected to the valve seat (110); the first air port (141) and the second air port (142) are located on a side of the fan housing (144) facing the valve seat (110); The fan housing (144) has a containing cavity, and the fan (143) is located in the containing cavity.

4. The ventilation valve (100) according to claim 1, characterized in that: The driving assembly (150) comprises a motor (151), an adapter (152) and a mounting member (155); an output shaft (1511) of the motor (151) is passed through an end of the adapter (152); an end of the adapter (152) facing away from the motor (151) is connected to the valve core (120); The mounting member (155) is partially sleeved on the adapter member (152), and the adapter member (152) is rotatably arranged relative to the mounting member (155).

5. The ventilation valve (100) according to claim 4, characterized in that: The end of the adapter (152) facing the motor (151) has a first plug hole (1521), and the output shaft (1511) of the motor (151) and the adapter (152) are connected via the first plug hole (1521); The cross-sectional profile of the output shaft (1511) of the motor (151) is adapted to the profile of the first plug hole (1521).

6. The ventilation valve (100) according to claim 5, characterized in that: The adapter (152) has a plug-in portion (1523) on one side facing the valve core (120), the valve core (120) has a second plug-in hole (123), and the plug-in portion (1523) is inserted into the second plug-in hole (123); The cross-sectional profile of the plug-in portion (1523) is adapted to the profile of the second plug-in hole (123).

7. A sputum removal system (200), characterized in that: It comprises a controller (210), a pressure detector (220) and the ventilation valve (100) according to any one of claims 1 to 6; The pressure detector (220) is configured to detect the pressure of the third channel port (113) of the first channel (114); The controller is electrically connected to the pressure detector (220) and the ventilation valve (100), respectively.

Images