Intelligent non-invasive positive pressure ventilation mask capable of adjusting exhalation volume

Abstract

The application discloses a noninvasive positive pressure ventilation mask capable of intelligently adjusting exhalation volume, which comprises a mask body, an inhalation channel and an exhalation channel are arranged on the mask body, an inhalation valve is connected to the inhalation channel, and an exhalation valve is connected to the exhalation channel; a carbon dioxide collecting pipe for extracting gas in the mask body is further arranged on the mask body, a carbon dioxide detecting device for detecting the carbon dioxide concentration of the gas in the mask body is connected to the tail end of the carbon dioxide collecting pipe, and a control unit for increasing the opening degree of the exhalation valve when the detected carbon dioxide concentration is greater than a preset carbon dioxide concentration threshold value is connected to the carbon dioxide detecting device. The noninvasive positive pressure ventilation mask disclosed by the application can monitor the carbon dioxide concentration of the gas in the mask body in real time, and the control unit adjusts the opening degree of the exhalation valve according to the carbon dioxide concentration of the gas in the mask body, so as to adjust the carbon dioxide concentration of the gas in the mask body in real time.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a non-invasive positive pressure ventilation mask with intelligent adjustable expiratory volume. Background Technology

[0002] Non-invasive positive pressure ventilation (NPPV) masks are crucial human-machine interface media connecting non-invasive ventilators and patients, and are a significant component affecting the effectiveness of NPPV. However, existing NPPV masks exhibit a significant dead space effect, which can easily lead to carbon dioxide rebreathing during NPPV application, thus affecting the treatment outcome for patients with carbon dioxide retention. Furthermore, while gas is expelled through the expiratory valve, current masks cannot dynamically control the size of the expiratory valve vent, failing to meet the treatment needs of patients with varying degrees of carbon dioxide retention.

[0003] A prior patent application (publication number: CN110787351A) disclosed a multifunctional non-invasive positive pressure ventilation mask, including a mask body with an inhalation channel and an expiratory channel. The expiratory channel integrates a multifunctional mounting interface, which can accommodate different types of expiratory valves. This patent allows for the integration of different types of expiratory valves through the multifunctional mounting interface, thus adapting to patients with different conditions.

[0004] However, existing non-invasive positive pressure ventilation (NPPV) masks exhibit a significant dead space effect. This means that during NPPV, the carbon dioxide concentration inside the mask can become excessively high, leading to prolonged carbon dioxide retention and consequently, excessively high respiration rates, thus negatively impacting treatment outcomes for patients with carbon dioxide retention. The carbon dioxide concentration inside the mask is constantly changing due to various factors. Therefore, dynamic monitoring and control of the expulsion rate are necessary to ensure the carbon dioxide concentration remains within a reasonable range and to meet the treatment needs of patients with varying degrees of carbon dioxide retention. Current NPPV masks cannot provide precise management of the carbon dioxide concentration within the mask.

[0005] Therefore, how to monitor the carbon dioxide concentration inside the mask in real time and control the amount of gas discharged from the mask in real time, so as to dynamically regulate the carbon dioxide concentration inside the mask and meet the treatment needs of patients with different degrees of carbon dioxide retention, is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a non-invasive positive pressure ventilation mask with intelligent adjustable expiratory volume, which can accurately monitor and synchronously regulate the carbon dioxide concentration of the gas inside the mask, thereby ensuring that the carbon dioxide concentration of the gas inside the mask is always at the most suitable state for the patient, thus meeting the treatment needs of patients with different degrees of carbon dioxide retention.

[0007] To achieve the above objectives, the present invention provides a non-invasive positive pressure ventilation mask with intelligent adjustable expiratory volume, including a mask body, wherein the mask body is provided with an inhalation channel and an expiratory channel, an inhalation valve is connected to the inhalation channel, and an expiratory valve is connected to the expiratory channel.

[0008] The mask body is also provided with a carbon dioxide collection tube for extracting gas from the mask body. The end of the carbon dioxide collection tube is connected to a carbon dioxide detection device for detecting the carbon dioxide concentration of the gas in the mask body. The carbon dioxide detection device is connected to a control unit for increasing the opening of the exhalation valve when the measured carbon dioxide concentration is greater than a preset carbon dioxide concentration threshold.

[0009] Preferably, the carbon dioxide detection device includes:

[0010] A collection device for collecting gas inside the mask body through the carbon dioxide collection tube;

[0011] An analytical device connected to the aforementioned acquisition device for analyzing the carbon dioxide concentration of a gas sample;

[0012] It is connected to the analysis device to process the analysis results data of the analysis device and send the processing results to the control unit.

[0013] Preferably, the carbon dioxide detection device further includes:

[0014] A display device connected to the processing unit for displaying the carbon dioxide concentration of a gas sample in real time, wherein the processing unit sends the measured carbon dioxide concentration information to the display device.

[0015] Preferably, the carbon dioxide detection device further includes:

[0016] A storage device connected to the processing device for storing carbon dioxide concentration information of the measured gas sample, wherein the processing device stores the carbon dioxide concentration monitoring information in the storage device.

[0017] Preferably, the control unit includes:

[0018] A judgment device connected to the carbon dioxide detection device for comparing carbon dioxide concentration with a preset carbon dioxide threshold.

[0019] An exhalation valve controller connected to the judgment device to increase the opening of the exhalation valve when the carbon dioxide concentration is higher than a preset carbon dioxide concentration threshold.

[0020] Preferably, the control unit further includes:

[0021] An intake valve controller connected to the judgment device, used to increase the opening of the intake valve when the carbon dioxide concentration is higher than a preset carbon dioxide concentration threshold.

[0022] Preferably, the carbon dioxide collection tube is equipped with a drying device for drying gas samples.

[0023] Preferably, the exhalation valve includes: a valve body and a connector connected together, the connector being connected to an interface of the mask body;

[0024] The valve body has a transversely penetrating vent hole and a longitudinally penetrating adjustment hole. The upper end of the adjustment hole communicates with the vent hole, and the lower end of the adjustment hole penetrates the bottom of the valve body.

[0025] The adjustment hole is provided with a sealing mechanism for adjusting the opening of the exhaust hole. The sealing mechanism includes a diaphragm, a top plate, and a lifting mechanism arranged sequentially from top to bottom in the adjustment hole. The lifting mechanism can push the top plate upward to move the diaphragm upward and close the exhaust hole.

[0026] Preferably, the lifting mechanism includes: a mounting base and a lifting assembly;

[0027] The mounting base is fixed to the bottom of the valve body and has a mounting hole that communicates with the adjustment hole of the valve body.

[0028] The lifting assembly includes: an outer magnetic yoke, an inner magnetic yoke, a magnet, a coil, and a top head; wherein, the outer magnetic yoke is fixed in the mounting hole of the mounting base, the inner magnetic yoke is fixedly fitted inside the outer magnetic yoke, the magnet is located between the outer magnetic yoke and the inner magnetic yoke, the inner magnetic yoke has a sliding groove, the coil is slidably disposed in the sliding groove of the inner magnetic yoke, and the top end of the coil can extend outward from the top ends of the inner and outer magnetic yokes to contact the top plate, the coil is connected to a control panel through a wire, and the top head covers the top end of the coil.

[0029] Preferably, the end of the carbon dioxide collection tube that is connected to the mask body is provided with an external thread section, and the mask body has a threaded interface that mates with the external thread.

[0030] The threaded interface is located on the outer periphery of the mask body, immediately adjacent to its air intake channel.

[0031] The present invention has the following beneficial effects:

[0032] The non-invasive positive pressure ventilation mask with intelligent expiratory volume adjustment disclosed in this invention collects gas from the mask body through a carbon dioxide collection tube, detects the carbon dioxide concentration of the gas sample through a carbon dioxide detection device, and uses the carbon dioxide concentration of the gas sample as the basis for adjusting the opening of the expiratory valve. By adjusting the opening of the expiratory valve, the amount of gas expelled from the mask body is adjusted, thereby achieving the purpose of dynamic monitoring and adjustment of the carbon dioxide concentration of the gas in the mask body, so that the carbon dioxide concentration of the gas in the mask body is always maintained at a preset concentration suitable for the patient, thereby meeting the treatment needs of patients with different degrees of carbon dioxide retention. Attached Figure Description

[0033] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and provide explanations, but do not constitute an undue limitation of this application. In the drawings:

[0034] Figure 1 This is a three-dimensional schematic diagram of the intelligent expiratory volume regulating non-invasive positive pressure ventilation mask described in this invention;

[0035] Figure 2 This is a front view of the intelligent expiratory volume-regulating non-invasive positive pressure ventilation mask described in this invention.

[0036] Figure 3 This is a schematic diagram illustrating the working principle of the intelligent expiratory volume regulating non-invasive positive pressure ventilation mask described in this invention.

[0037] Figure 4 This is a structural block diagram of the control unit described in this invention;

[0038] Figure 5 This is a schematic diagram of the exhalation valve described in this invention.

[0039] Attached icon number

[0040] 1-Mask body; 2-Inhalation channel; 3-Exhalation channel; 4-Inhalation valve; 5-Exhalation valve; 6-Carbon dioxide collection tube; 7-Carbon dioxide detection device; 8-Control unit; 9-Drying device; Detailed Implementation

[0041] The core of this invention is to provide a non-invasive positive pressure ventilation mask with intelligent adjustable expiratory volume, which can accurately monitor and synchronously regulate the carbon dioxide concentration of the gas inside the mask, thereby ensuring that the carbon dioxide concentration of the gas inside the mask is always in the most suitable state for the patient, thus meeting the treatment needs of patients with different degrees of carbon dioxide retention.

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] See Figure 1-3 This invention discloses an intelligent adjustable expiratory volume non-invasive positive pressure ventilation mask, including a mask body 1, an inhalation channel 2 and an expiratory channel 3, and an inhalation valve 4 connected to the inhalation channel 2 (see...). Figure 3 The exhalation channel 3 is connected to the exhalation valve 5 (see...). Figure 3 ).

[0044] The mask body 1 is also provided with a carbon dioxide collection tube 6 for extracting gas from the mask body 1. The end of the carbon dioxide collection tube 6 is connected to a carbon dioxide detection device 7 for detecting the carbon dioxide concentration of gas in the mask body. The carbon dioxide detection device 7 is connected to a control unit 8.

[0045] In this invention, a carbon dioxide collection tube 6 is used to collect gas from the mask body in real time. A carbon dioxide detection device 7 is connected to the end of the carbon dioxide collection tube 6 to measure the carbon dioxide concentration of the gas sample. A control unit 8 is connected to the carbon dioxide detection device 7 to adjust the opening of the exhalation valve 5 based on the carbon dioxide concentration measured by the carbon dioxide detection device 7, thereby adjusting the exhalation volume of the exhalation valve. Specifically, when the carbon dioxide detection device 7 detects that the carbon dioxide concentration of the gas sample is greater than a preset carbon dioxide concentration threshold, the control unit 8 controls the exhalation valve 5 to operate and increases the opening of the exhalation valve 5, thereby increasing the exhalation volume of the exhalation valve 5. This allows the gas with a high carbon dioxide concentration in the mask body 1 to be quickly expelled, thereby reducing the carbon dioxide concentration in the mask body 1, preventing significant dead space effects, and reducing carbon dioxide rebreathing.

[0046] Those skilled in the art will understand that the ventilator introduces oxygen from the inspiratory channel 2 through the inspiratory valve 4 into the mask body 1 to achieve positive pressure ventilation for the patient, while the patient's exhaled gas is discharged from the expiratory channel 3 through the expiratory valve 5. In this invention, when the carbon dioxide concentration measured by the carbon dioxide detection device 7 is greater than a preset carbon dioxide concentration threshold, the control unit 8 controls the opening of the expiratory valve 5 to increase, thereby rapidly expelling the gas with a higher carbon dioxide concentration from the mask and achieving real-time adjustment of the carbon dioxide concentration of the gas inside the mask body 1.

[0047] In summary, this invention enables real-time and precise monitoring and synchronous control of the carbon dioxide concentration within the mask body 1, ensuring that the carbon dioxide concentration within the mask body 1 remains at the optimal level for the patient. This effectively prevents significant dead space effects and reduces carbon dioxide rebreathing, thus meeting the treatment needs of patients with varying degrees of carbon dioxide retention. The aforementioned control unit 8 can be a single-chip microcontroller or processor. For example, the control unit can be a C8051F005 microcontroller. The two comparators in the C8051F005 microcontroller can meet the requirement of comparing the measured carbon dioxide concentration with a preset carbon dioxide concentration threshold. Other parts of the comparison circuit can refer to existing technologies and will not be elaborated here.

[0048] like Figure 2 As shown, the positive pressure ventilation process for the patient in this invention is controlled by an inspiratory valve 4 and an expiratory valve 5. The inspiratory valve 4 is located in the inspiratory channel 2, and the expiratory valve 5 is located in the expiratory channel 3. When the carbon dioxide concentration in the mask body 1 is greater than a preset carbon dioxide concentration value, the control unit 8 controls the opening of the expiratory valve 5 to quickly expel the gas with a high carbon dioxide concentration. At the same time, the control unit 8 can also control the opening of the inspiratory valve 4, increasing the opening of the inspiratory valve 4 to quickly introduce oxygen into the mask, thereby achieving high efficiency in carbon dioxide concentration regulation.

[0049] like Figure 3 As shown, the carbon dioxide detection device 7 includes a collection device 7a, an analysis device 7b, and a processing device 7c connected in sequence. The collection device 7a collects gas from inside the mask body 1 through the carbon dioxide collection tube 6, the analysis device 7b analyzes the carbon dioxide concentration of the gas sample, and the processing device 7c processes the analysis results and sends them to the control unit 8.

[0050] Specifically, the collection device 7a can be a miniature air pump. The collection device 7a draws gas from the mask body 1 through the carbon dioxide collection tube 6 and delivers the sample to the analysis device 7b.

[0051] The analysis device 7b can be specifically a carbon dioxide sensor. After the sampling device 7a completes the sampling, it transports the sample to the analysis device 7b, which analyzes the sample to obtain the carbon dioxide content in the sample.

[0052] The processing device 7c processes the analyzed data into signals that the control unit 8 needs to determine. The processing device 7c is connected to the control unit 8 and sends the processed data to the control unit 8.

[0053] In another embodiment, the carbon dioxide detection device 7 further includes a display device 7d connected to the processing device 7c for displaying the carbon dioxide concentration of the sample in real time. The processing device sends the measured carbon dioxide concentration information to the display device 7d to display the carbon dioxide concentration of the gas inside the mask body 1 in real time, thereby facilitating observation by medical personnel.

[0054] In another embodiment, the carbon dioxide detection device 7 further includes a storage device 7e connected to the processing device 7c for storing the measured carbon dioxide concentration information of the sample. The processing device 7c stores the carbon dioxide concentration monitoring information in the storage device 7e. The storage device 7e stores the measured carbon dioxide concentration information, thereby facilitating retrieval of the measured carbon dioxide concentration information when needed.

[0055] Because the patient's exhaled air contains saliva secretions, the sample collected by the collection device 7a is mixed with liquid. The presence of liquid can affect the carbon dioxide analysis results. Therefore, the carbon dioxide collection tube 6 of this invention is equipped with a drying device 9 (see...). Figure 3 The drying device 9 can absorb moisture from the sample, keeping the gas sample entering the carbon dioxide detection device 7 dry. The drying device 9 can specifically be a dryer containing a desiccant or an adsorbent.

[0056] like Figure 4 As shown, the control unit 8 includes a judgment device 8a, an exhalation valve controller 8b, and an inhalation valve controller 8c. The judgment device 8a is connected to the processing device 7c of the carbon dioxide detection device 7. The judgment device 8a compares the analysis result with a preset carbon dioxide threshold. If the analysis result is higher than the preset carbon dioxide threshold, it indicates that the gas inside the mask body 1 is in an unsuitable state for the patient. The judgment device 8a transmits the comparison result to the exhalation valve controller 8b and the inhalation valve controller 8c, thereby adjusting the opening of the exhalation valve 5 and the inhalation valve 4, and thus regulating the carbon dioxide concentration of the gas inside the mask body 1. Obviously, there is also some connection between the exhalation valve controller 8b and the exhalation valve 5, and between the inhalation valve controller 8c and the inhalation valve 4. The specific connection method is determined by the form of the exhalation valve 5 and the inhalation valve 4, and is not limited here.

[0057] like Figure 5 As shown, in one specific embodiment, the exhalation valve 5 includes a valve body 5a and a connector 5o connected together. The valve body is connected to the exhalation channel of the mask body 1 through the connector 5o. The valve body 5a has a transversely penetrating exhaust hole 5b and a longitudinally extending adjustment hole 5c. The upper end of the adjustment hole 5c communicates with the exhaust hole 5b, and the lower end of the adjustment hole 5c penetrates the bottom of the valve body 5a.

[0058] An adjustment hole 5c is equipped with a sealing mechanism for adjusting the opening of the exhaust hole 5b. The sealing mechanism includes, from top to bottom, a diaphragm 5d, a top plate 5e, and a lifting mechanism disposed within the adjustment hole 5c. The diaphragm 5d adjusts the opening of the exhaust hole 5b by lifting upwards and lowering downwards. Those skilled in the art will understand that the greater the degree to which the diaphragm 5d is lifted upwards, the smaller the opening of the exhaust hole 5b; conversely, the greater the degree to which the diaphragm 5d is lowered downwards, the larger the opening of the exhaust hole 5b.

[0059] In this invention, the upward lifting of the diaphragm 5d is achieved by a lifting mechanism, and the downward falling of the diaphragm 5d is achieved by its own weight. Specifically, the lifting mechanism includes a mounting base 5l and a lifting assembly. The mounting base 5l is fixed to the bottom of the valve body 5a and has a mounting hole that connects to the adjustment hole 5c of the valve body.

[0060] The lifting assembly specifically includes an outer magnetic yoke 5f, an inner magnetic yoke 5g, a magnet 5h, a coil 5j, and a top head 5K. The outer magnetic yoke 5f is fixed within the mounting hole of the mounting base 5l. The inner magnetic yoke 5g is fixedly fitted inside the outer magnetic yoke 5f; specifically, the inner magnetic yoke 5g is confined within the outer magnetic yoke 5f by a retaining ring 5n. The magnet 5h is annular and located between the outer magnetic yoke 5f and the inner magnetic yoke 5g. The inner magnetic yoke 5g has a groove 5i, and the coil 5j is slidably disposed within the groove 5i of the inner magnetic yoke 5g. The coil 5j is restricted to sliding up and down along the groove 5i of the inner magnetic yoke 5g, but cannot rotate. The top end of the coil 5j extends beyond the top ends of the inner magnetic yoke 5g and the outer magnetic yoke 5f to contact the top plate 5e, and the top head 5e covers the top end of the coil 5j.

[0061] In this invention, coil 5j is connected to control unit 8 via wire 5m. When the current flowing through coil 5j is greater, the magnet 5h exerts a greater upward force on coil 5i, which in turn increases the force that lifts the top plate 5e via the top head 5k, resulting in a greater upward lift of diaphragm 5d to close the exhaust port 5b, thus reducing the opening of exhaust port 5b. Conversely, when the current flowing through coil 5j is smaller, coil 5j falls due to its own weight, causing the opening of exhaust port 5b to increase. Coil 5j in exhalation valve 5 is connected to control unit 8; specifically, coil 5j is connected to the breathing valve controller 8b of control unit 8, thereby automatically controlling the opening of exhaust port 5b of exhalation valve 5 based on the measured carbon dioxide concentration, thus achieving intelligent adjustment of the exhalation volume of exhalation valve 5. Of course, exhalation valve 5 can also refer to other adjustable-opening exhalation valve structures in the prior art, which will not be elaborated upon here.

[0062] like Figure 1 , Figure 2As shown in a further embodiment, the end of the carbon dioxide collection tube 6 that connects to the mask body 1 is provided with an external thread section, and the mask body 1 has a threaded interface that mates with the external thread. The carbon dioxide collection tube 6 and the mask body 1 are connected by a thread, making installation very convenient. Preferably, the threaded interface is arranged on the outer periphery of the mask body 1, adjacent to its inhalation channel 2. That is, by arranging the threaded interface close to the inhalation channel 2, the gas sample collected by the carbon dioxide collection tube 6 is closest to the state inhaled by the patient, thereby more accurately reflecting the carbon dioxide concentration of the gas inhaled by the patient.

[0063] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0064] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0065] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A non-invasive positive pressure ventilation mask with intelligent adjustable expiratory volume, comprising a mask body (1), wherein the mask body (1) is provided with an inhalation channel (2) and an expiratory channel (3), wherein an inhalation valve (4) is connected to the inhalation channel (2), and an expiratory valve (5) is connected to the expiratory channel (3); characterized in that, The mask body (1) is also provided with a carbon dioxide collection tube (6) for extracting gas from the mask body (1). The carbon dioxide collection tube (6) is used to collect gas from the mask body (1) in real time. The end of the carbon dioxide collection tube (6) is connected to a carbon dioxide detection device (7) for detecting the carbon dioxide concentration of the gas in the mask body (1). The carbon dioxide detection device (7) is connected to a control unit (8) for increasing the opening of the exhalation valve (5) when the measured carbon dioxide concentration is greater than a preset carbon dioxide concentration threshold. The carbon dioxide detection device (7) includes: A collection device (7a) for collecting gas inside the mask body (1) through the carbon dioxide collection tube (6); An analytical device (7b) connected to the acquisition device (7a) for analyzing the carbon dioxide concentration of a gas sample; A processing device (7c) connected to the analysis device (7b) for processing the analysis result data of the analysis device (7b) and sending the processing result to the control unit (8). The control unit (8) includes a judgment device (8a), an exhalation valve controller (8b), and an inhalation valve controller (8c); the judgment device (8a) is connected to the processing device (7c) of the carbon dioxide detection device (7); The judgment device (8a) compares the analysis result with the preset carbon dioxide threshold. If the analysis result is higher than the preset carbon dioxide threshold, the judgment device (8a) transmits the comparison result to the exhalation valve controller (8b) and the inhalation valve controller (8c) to adjust the opening of the exhalation valve (5) and the inhalation valve (4); thereby realizing the rapid discharge of gas with high carbon dioxide concentration from the mask, and thus realizing the real-time adjustment of the carbon dioxide concentration of the gas in the mask body (1); The carbon dioxide collection tube (6) is provided with an external thread section at one end for connecting to the mask body (1), and the mask body (1) is provided with a threaded interface that matches the external thread; the carbon dioxide collection tube (6) and the mask body (1) are connected by threads, and the threaded interface is arranged on the outer periphery of the mask body (1) adjacent to its air intake channel (2), and the threaded interface is arranged at a position adjacent to the air intake channel (2).

2. The intelligent adjustable expiratory volume non-invasive positive pressure ventilation mask according to claim 1, characterized in that, The carbon dioxide detection device (7) further includes: A display device (7d) is connected to the processing device (7c) for displaying the carbon dioxide concentration of a gas sample in real time. The processing device (7c) sends the measured carbon dioxide concentration information to the display device (7d).

3. The intelligent adjustable expiratory volume non-invasive positive pressure ventilation mask according to claim 2, characterized in that, The carbon dioxide detection device (7) further includes: A storage device (7e) is connected to the processing device (7c) for storing carbon dioxide concentration information of the measured gas sample, and the processing device (7c) stores the carbon dioxide concentration monitoring information to the storage device (7e).

4. The intelligent adjustable expiratory volume non-invasive positive pressure ventilation mask according to claim 3, characterized in that, The carbon dioxide collection tube (6) is equipped with a drying device (9) for drying the gas sample.

5. The intelligent adjustable expiratory volume non-invasive positive pressure ventilation mask according to claim 3, characterized in that, The exhalation valve (5) includes: a valve body (5a) and a connector (5o) connected together, the connector (5o) being connected to the interface of the mask body (1). The valve body (5a) has a transversely penetrating vent hole (5b) and a longitudinally penetrating adjustment hole (5c). The upper end of the adjustment hole (5c) is connected to the vent hole (5b), and the lower end of the adjustment hole (5c) penetrates the bottom of the valve body (5a). The regulating hole (5c) is provided with a sealing mechanism for adjusting the opening of the exhaust hole (5b). The sealing mechanism includes a diaphragm (5d), a top plate (5e), ​​and a lifting mechanism arranged sequentially from top to bottom in the regulating hole (5c). The lifting mechanism can push the top plate (5e) upward so that the diaphragm (5d) moves upward and closes the exhaust hole (5b).

6. The intelligent adjustable expiratory volume non-invasive positive pressure ventilation mask according to claim 5, characterized in that, The lifting mechanism includes: a mounting base (5l) and a lifting assembly; The mounting base (5l) is fixed to the bottom of the valve body (5a) and has a mounting hole that connects to the adjustment hole (5c) of the valve body (5a). The lifting assembly includes: an outer magnetic yoke (5f), an inner magnetic yoke (5g), a magnet (5h), a coil (5j), and a top head (5k); wherein, the outer magnetic yoke (5f) is fixed in the mounting hole of the mounting base (5l), the inner magnetic yoke (5g) is fixedly fitted inside the outer magnetic yoke (5f), the magnet (5h) is located between the outer magnetic yoke (5f) and the inner magnetic yoke (5g), the inner magnetic yoke (5g) has a sliding groove (5i), the coil (5j) is slidably disposed in the sliding groove (5i) of the inner magnetic yoke (5g), and the top end of the coil (5j) can extend out of the top ends of the inner magnetic yoke (5g) and the outer magnetic yoke (5f) to contact the top plate (5e), ​​the coil (5j) is connected to the control unit (8) through a wire (5m), and the top head (5k) covers the top end of the coil (5j).

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