Airway dilator

Abstract

The present invention provides an airway expansion device, which can stimulate a pulse pressure airflow with a certain positive pressure on the airflow exhaled by the patient, generate pulse pressure oscillation in the airway, promote the relaxation and liquefaction of the viscous sputum on the surface of the inner airway, and stimulate the cilia peristalsis on the surface of the inner airway, so as to assist the patient to expel the sputum from the body, clear the airway congestion, and ensure the patient's unobstructed breathing. Its atomization branch, oscillation branch, and expansion branch are connected in parallel at the output end of the step-down regulator R1; the step-down regulator R1 is used to form a constant pressure airflow P1 output; an oscillation pulse generator VR1 and a waveform shaper VR2 are arranged on the oscillation branch; the oscillation pulse generator VR1 is used to form a square wave pulse pressure airflow P3 for the constant pressure airflow P1, and the waveform shaper VR2 is used to shape the pulse waveform of the square wave pulse pressure airflow P3 to form an oscillation airflow P31 with a smooth pulse rising edge and falling edge; the expansion branch is used to output a constant pressure expansion airflow P4 with a lower pressure.

Description

Technical Field

[0001] The present invention relates to a medical device, specifically, a therapeutic device that utilizes a method of stimulating airflow oscillation in a patient's respiratory tract to loosen and break up viscous secretions (sputum) accumulated in the airway, and assists the patient in expelling the sputum from the body to eliminate congestion in the airway. The device can be used to assist critically ill patients with respiratory tract infections in clearing / expelling thick secretions (sputum) that are clogging the airway, and ensure that the patient can breathe freely. Background Art

[0002] For patients with COPD, lung infection, and inflammation after lung surgery, a large amount of thick sputum produced by inflammation stubbornly adheres to the inner surface of the airway, which will block the patient's respiratory tract and seriously hinder the patient's normal breathing. In severe cases, it may even cause the patient to suffocate and endanger the patient's life. How to clear the large amount of thick sputum produced by inflammation on the inner surface of the trachea, bronchi and other airways in the lungs, eliminate the blockage of the internal airway, and ensure that the patient breathes smoothly is an important physical therapy method to promote the patient's recovery.

[0003] CN116832284A discloses a lung clearing device, which includes an air supply circuit, an exhalation circuit, two heating wires respectively arranged inside the air supply circuit and the exhalation circuit, two pressure release oscillators respectively installed on the air supply circuit and the exhalation circuit, a heating ultrasonic atomizer installed on the air supply circuit, and a gas generator connected to the input end of the air supply circuit. The gas generator generates gas and delivers it to the air supply circuit. After being processed by the heating wire and the heating ultrasonic atomizer that cooperate with the air supply circuit, the large tidal volume, heated, and fully humidified gas enters the patient's lungs through the artificial airway connection port. The gas is conducive to promoting the displacement of secretions. When the patient actively coughs to clear the airway secretions, the high airway pressure generated can be released by the pressure release oscillators on the air supply circuit and the exhalation circuit, thereby avoiding lung damage caused by high airway pressure and further promoting the displacement of airway secretions, effectively solving the active clearing of airway secretions in patients with respiratory failure who are mechanically ventilated. However, the specific structure of the pressure release oscillator means that it only has the function of releasing pressure, and cannot oscillate the gas delivered into the human body, nor can it promote the relaxation and liquefaction of the viscous sputum attached to the surface of the patient's airway. It cannot assist the patient in expelling the sputum from the body, clear the airway congestion, and ensure the patient's unobstructed breathing. Summary of the invention

[0004] The purpose of the present invention is to provide an airway expander, which can stimulate a pulse pressure airflow with a certain positive pressure (greater than 1 atmosphere) on the airflow exhaled by the patient, so that the airflow exhaled by the patient produces pulse pressure oscillations in the patient's airway, thereby promoting the relaxation and liquefaction of viscous sputum attached to the surface of the patient's internal airway, and stimulating the cilia on the surface of the patient's internal airway to move, assisting the patient to expel sputum from the body, clearing airway congestion, and ensuring that the patient breathes smoothly.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] The airway expansion device comprises a step-down regulator R1, and three branches, namely, an atomization branch, an oscillation branch, and an expansion branch; the step-down regulator R1 is used to step down and stabilize the airflow P0 with a certain positive pressure to form a constant pressure airflow P1 output;

[0007] The three branches are connected in parallel at the output end of the buck regulator R1;

[0008] The atomization branch is provided with an atomization step-down regulator R2 and a nebulizer; the atomization step-down regulator R2 is used to step down the constant-pressure airflow P1 to output a constant-pressure airflow P2 with a lower pressure, and the constant-pressure airflow P2 is used as the input airflow of the nebulizer, flows through the nebulizer to atomize the liquid medicine in the nebulizer, and the liquid medicine is atomized and mixed into the constant-pressure airflow P2 to form a drug atomization treatment airflow P21 for output;

[0009] An oscillation pulse generator VR1 and a waveform shaper VR2 are provided on the oscillation branch; the oscillation pulse generator VR1 is used to form a square wave pulse pressure airflow P3 output from the constant pressure airflow P1, and the waveform shaper VR2 is used to shape the pulse waveform of the square wave pulse pressure airflow P3 to form an oscillation airflow P31 output with smooth pulse rising and falling edges;

[0010] An expansion step-down regulator R3 is provided on the expansion branch, and the expansion step-down regulator R3 is used to step down the constant-pressure airflow P1 to output a constant-pressure expansion airflow P4 with a lower pressure.

[0011] The above-mentioned airway expander also includes a high-frequency pulse modulator VR3 connected to the output end of the waveform shaper VR2 on the oscillation branch. The high-frequency pulse modulator VR3 is used to modulate a high-frequency oscillation component on the carrier of the oscillating airflow P31.

[0012] In the above-mentioned airway expander, the output end of the waveform shaper VR2 is connected in parallel with two branches, one of which is connected in series with a valve V5, and the other is connected in series with a high-frequency pulse modulator VR3 and a valve V4.

[0013] In the above-mentioned airway expander, the high-frequency pulse modulator VR3 is the solenoid valve V6.

[0014] In the above-mentioned airway expansion device, the oscillation pulse generator VR1 is a two-position three-way solenoid valve, and the constant pressure airflow P1 is output as a square wave pulse pressure airflow P3 through repeated on and off of the two-position three-way solenoid valve; the waveform shaper VR2 is a container with a certain capacity. The capacity of the container can be adjusted.

[0015] In the above-mentioned airway expander, the atomizing pressure-reducing regulator R2 and the expanding pressure-reducing regulator R3 are both pressure regulating valves.

[0016] In the above-mentioned airway expander, solenoid valves V11, V12 and V13 are respectively provided on the atomization branch, the expansion branch and the oscillation branch, and the controller is electrically connected to the solenoid valves V11, V12 and V13 to control the switching of each solenoid valve; when the solenoid valve on any branch is closed, there is no airflow output in the branch.

[0017] The above-mentioned airway expander also includes pressure sensors arranged on the atomization branch, oscillation branch, and expansion branch for monitoring the pressure of the constant pressure airflow P2, the pressure of the oscillating airflow P31, and the pressure of the expansion airflow P4 respectively, and each pressure sensor is electrically connected to the controller.

[0018] In the above-mentioned airway expansion device, the airflow P0 with a certain positive pressure includes an oxygen source and a compressed air source, which are connected to two inlets of a two-position three-way solenoid valve T1 for switching the air source through pipelines, and the outlet of the two-position three-way solenoid valve T1 is connected to the inlet of the step-down regulator R1. The step-down regulator R1 adopts a proportional pressure regulating valve.

[0019] The above-mentioned airway expander also includes a mask for attaching to the human face, a nose clip for clamping the nose wings, and a triple hose connected to the mask; a nebulizer FG is set on a hose RG1 and is connected to the nebulization branch after the nebulization step-down regulator R2, a hose RG2 is connected to the oscillation expansion branch formed by connecting the oscillation branch after the waveform shaper VR2 and the expansion branch after the expansion step-down regulator R3 in parallel, and a hose RG3 is a respiratory pressure monitoring hose; the respiratory pressure monitoring hose is connected to the respiratory pressure tube, and a respiratory pressure sensor is set on the respiratory pressure tube.

[0020] In the above-mentioned airway expansion device, the outlet of the atomizing pressure reducing regulator R2 is communicated with the atomizing docking seat, the atomizing docking joint pluggably connected to the atomizing docking seat is communicated with the airflow input end of the atomizer through the atomizing hose, and the airflow output end of the atomizer is communicated with the mask;

[0021] The outlet of the waveform shaper VR2 is connected in parallel with the outlet of the expansion buck regulator R3 and communicates with the oscillation expansion docking seat, and the oscillation expansion docking head pluggably connected to the oscillation expansion docking seat communicates with the mask through the oscillation expansion hose;

[0022] The end of the respiratory pressure monitoring hose connected to the mask is connected to a respiratory pressure monitoring joint, which is pluggable and connected to the respiratory pressure monitoring docking seat. The respiratory pressure monitoring docking seat is connected to the respiratory pressure tube. The respiratory pressure tube is provided with a respiratory pressure sensor electrically connected to the controller for monitoring the respiratory pressure of the human body.

[0023] The above-mentioned airway expander, the atomizing joint, the oscillating expansion joint, and the respiratory pressure monitoring joint are all provided with filter membranes for filtering the gas entering and exiting the atomizing joint, the oscillating expansion joint, and the respiratory pressure monitoring joint.

[0024] The above-mentioned airway expander, the atomization joint, the oscillation expansion joint, and the respiratory pressure monitoring joint are jointly arranged on a quick docking head, and the atomization docking seat, the oscillation expansion docking seat, and the respiratory pressure monitoring docking seat are jointly arranged on a quick docking seat; after the quick docking joint is docked with the quick docking seat, the atomization joint, the oscillation expansion joint, and the respiratory pressure monitoring joint are respectively in sealing contact with the atomization docking seat, the oscillation expansion docking seat, and the respiratory pressure monitoring docking seat.

[0025] The above-mentioned airway expander, the quick docking joint includes a cover plate, a filter membrane support plate opposite to the cover plate, a filter membrane arranged between the cover plate and the filter membrane support plate, the cover plate, the filter membrane and the filter membrane support plate form an atomization filter chamber, an oscillation expansion filter chamber, and a respiratory pressure monitoring filter chamber that are not connected to each other in the circumferential direction; the outer side of the filter membrane support plate has an atomization docking tube, an oscillation expansion docking tube, and a respiratory pressure monitoring docking tube extending outward and respectively connected to the atomization filter chamber, the oscillation expansion filter chamber, and the respiratory pressure monitoring filter chamber; after the quick docking joint is docked with the quick docking seat, the atomization docking tube, the oscillation expansion docking tube, and the respiratory pressure monitoring docking tube are respectively in sealing contact with the atomization docking seat, the oscillation expansion docking seat, and the respiratory pressure monitoring docking seat; the atomization hose, the oscillation expansion hose, and the respiratory pressure monitoring hose are respectively connected to the atomization filter chamber, the oscillation expansion filter chamber, and the respiratory pressure monitoring filter chamber.

[0026] In the above-mentioned airway expander, a photocatalyst disinfection filter for disinfecting the passing gas is arranged on the pipelines connecting the airflow output end of the nebulizer, the oscillation expansion hose, the respiratory pressure monitoring hose and the mask.

[0027] The above-mentioned airway expander and photocatalyst disinfection filter include a shell with openings at both ends, one end of the shell is connected to the mask, and the other end is connected to the airflow output end of the nebulizer, the oscillation expansion hose, and the respiratory pressure monitoring hose. Inside the shell are a filter membrane coated with a photocatalyst and a photocatalyst trigger control board, and the photocatalyst trigger control board is electrically connected to an ultraviolet lamp; when the photocatalyst trigger control board controls the ultraviolet lamp to work, ultraviolet rays are emitted to irradiate the photocatalyst on the filter membrane.

[0028] The above-mentioned airway expander also includes a Venturi device, which includes an inlet pipe and an outlet pipe connected through the throat, and the inner diameters of the inlet pipe and the outlet pipe are both larger than the inner diameter of the throat; an inlet connected to the airflow output end of the nebulizer is opened on the outer periphery of the inlet pipe; the oscillation expansion hose passes through the inlet pipe along the axial direction and extends into the front part of the throat; the end of the respiratory pressure monitoring hose extends to the outlet of the outlet pipe; the outlet of the outlet pipe is connected to the mask.

[0029] The above-mentioned airway expander also includes a photocatalyst disinfection filter; the photocatalyst disinfection filter includes a shell with openings at both ends, one end of the shell is connected to the mask, and the other end is connected to the outlet of the outlet pipe. There are a filter membrane coated with a photocatalyst and a photocatalyst trigger control board inside the shell, and the photocatalyst trigger control board is electrically connected to the ultraviolet lamp; when the photocatalyst trigger control board controls the ultraviolet lamp to work, ultraviolet rays are emitted to irradiate the photocatalyst on the filter membrane to disinfect the passing gas.

[0030] In the above-mentioned airway expander, a gas mixing ratio regulating valve is arranged between the outlet of the outlet pipe and the mask, which is used to adjust the ratio of the air volume entering the mask through the outlet pipe and the air volume entering the mask through the gas mixing ratio regulating valve.

[0031] The airway expander described above has a nose clip for clamping the nose to prevent nasal breathing, which is arranged on the inner side of the mask that fits the human face.

[0032] Beneficial effects of the present invention:

[0033] After the airflow (oxygen or air) P0 with a certain positive pressure enters the airway expander, it passes through the step-down regulator R1 to form a stable constant pressure airflow P1.

[0034] The constant pressure airflow P1 forms three parallel branches, which flow into the atomizing step-down regulator R2, the oscillating pulse generator VR1 and the dilation step-down regulator R3 respectively. The three airflows generate three internal airway treatment methods: atomization, oscillation and dilation:

[0035] Nebulizer therapy: The constant-pressure airflow P1 flows through the nebulizer step-down regulator R2, and the output constant-pressure airflow P2 with a lower pressure is used as the input airflow of the nebulizer FG. After the constant-pressure airflow P2 flows through the nebulizer FG, the liquid medicine in the nebulizer will be atomized and mixed into the output airflow to generate humidified drug atomization treatment airflow P21, which is output to the mask for auxiliary drug therapy for airway expansion and clearing (such as antibiotics for anti-inflammatory, internal respiratory tract relaxation, etc.) and internal airway humidification therapy.

[0036] Oscillation therapy: The constant pressure airflow P1 flows through the oscillation pulse generator VR1 to form a square wave pulse pressure airflow P3. Since the square wave pulse pressure airflow P3 is a pulse square wave, its rising and falling edges are very steep. If it directly enters the patient's internal airway, it will cause a great impact on the patient's internal airway and damage the patient's internal airway. Therefore, the square wave pulse pressure airflow P3 needs to be output to the waveform shaper VR2. The waveform shaper VR2 can convert the square wave pulse pressure airflow P3 into an oscillating airflow P31 with a relatively gentle rising and falling edges, thereby avoiding damage to the airway in the human body. The waveform shaper VR2 has an adjustable mechanism that can adjust the oscillation waveform according to the symptoms and tolerance of different patients to meet different treatment needs. The oscillating airflow P31 is used for internal airway expansion and clearing treatment, which can effectively loosen, relax, and liquefy the viscous sputum attached to the surface of the patient's internal airway, and promote and stimulate the cilia peristalsis on the surface of the patient's internal airway, assisting the patient to expel sputum from the body and clear airway congestion.

[0037] Dilation therapy: There is also a constant-pressure dilation therapy method for internal airway treatment. The constant-pressure airflow P1 passes through the dilation step-down regulator R3 to generate a stable constant-pressure dilation airflow P4, which can provide a continuous positive pressure breathing airflow to the patient's internal airway with the help of breathing. It can generate continuous dilation positive pressure on the patient's internal airway, allowing the internal airway to expand, to relieve respiratory obstruction caused by accumulation of infection secretions / or collapse and atrophy of the internal airway.

[0038] The frequency of the conventional oscillation waveform P31 is 2-4 Hz, which mainly provides energy for the oscillation source in the airway. Since the resonance frequency of thick sputum is at the level of hundreds of Hz, if a high-frequency oscillation at the level of hundreds of Hz is modulated on the main oscillation waveform P31, it can produce an effective loosening and fragmentation effect on the thick sputum. Therefore, if a higher high-frequency component is modulated on the pulse oscillation airflow P31, it can produce a more effective loosening and fragmentation treatment effect on very thick sputum. Therefore, a high-frequency pulse modulator VR3 is also set on the oscillation branch. The high-frequency pulse modulator VR3 is used to modulate the high-frequency oscillation component on the carrier of the oscillation airflow P31. For the convenience of control, a valve V5 is connected in series on the oscillation branch between the waveform shaper VR2 and the mask. The high-frequency pulse modulator VR3 is connected in series with the valve V4 and then in parallel with the valve V5. Therefore, through the control of valves V4 and V5, the oscillating airflow P31 can also be introduced into the high-frequency pulse modulator VR3, and the high-frequency harmonic component can be modulated on the fundamental wave of the oscillating airflow P31 to generate a treatment waveform different from the oscillating airflow P31. The high-frequency pulse modulator VR3 can be an electromagnetic valve V6. The control circuit switches the high frequency of the oscillating airflow P31 on and off through the high-frequency switch of the electromagnetic valve V6, and modulates the oscillating airflow P32 containing the high-frequency component on the oscillating airflow P31. During treatment, the high-frequency frequency of the oscillating airflow P32 containing the high-frequency component can be adjusted according to different patient symptoms and signs.

[0039] The oscillation pulse generator VR1 is a two-position three-way solenoid valve or solenoid valve V7. The two-position three-way solenoid valve or solenoid valve V7 is repeatedly turned on and off to make the constant pressure airflow P1 form a square wave pulse pressure airflow P3 output; the waveform shaper VR2 is a container with a certain capacity. The capacity of the container can be adjusted according to the treatment needs. The larger the capacity of the container, the smoother the rising and falling edges of the oscillating airflow P31.

[0040] The above three treatment methods are controlled by the central control system and can be operated independently or used in parallel in any combination. For example, solenoid valve V11, solenoid valve V12, and solenoid valve V13 are respectively set on the atomization branch, the expansion branch, and the oscillation branch. The controller is electrically connected to the solenoid valve V11, the solenoid valve V12, and the solenoid valve V13 to control the switch of each solenoid valve; when the solenoid valve on any branch is closed, there is no airflow output in the branch. Whether the constant pressure airflow P2 drives the nebulizer is controlled by the solenoid valve V11, the solenoid valve V12 controls the output of the constant pressure expansion airflow P4, and the solenoid valve V13 controls whether the oscillation airflow P31 is output for internal airway expansion and clearing treatment. In other words, by controlling the on and off of the solenoid valve V11, the solenoid valve V12, and the solenoid valve V13, the three treatment methods can be selected to be used alone, any two or three of them can be used in sequence, or used simultaneously, etc.

[0041] Because of the controller, doctors can program the three main functions of the airway dilator, namely oscillation, expansion and atomization, according to the patient's actual condition to form any combination of treatment plans and achieve the best treatment effect.

[0042] The pressure sensors installed on the three branches monitor the pressure of the constant pressure airflow P2, the oscillating airflow P31 and the expansion airflow P4, and feed them back to the controller to provide feedback parameters for the automatic control of the system, so as to determine whether the gas pressure on the three branches is within the set range and make timely adjustments.

[0043] The atomizing step-down regulator R2, the expanding step-down regulator R3, etc. can use a pressure regulating valve, such as a manual pressure regulating valve, a proportional pressure regulating valve, etc.

[0044] The triple hose can be quickly connected with the atomization branch, oscillation expansion branch, and breathing pressure tube, which is easy to operate. The quick-connect joint and quick-connect socket can be quickly plugged in and out, making it more convenient to use.

[0045] By using a structure that separates the breathing gun from the host, different patients can use different breathing guns to prevent cross infection.

[0046] A filter membrane is installed inside the quick-connect joint to prevent the gas on the patient side from infecting or contaminating the host.

[0047] The nebulizer works with the Venturi device to make the drug atomization more complete.

[0048] The photocatalyst disinfection filter further disinfects and filters the incoming and outgoing gases, making it safer.

[0049] The gas mixing ratio regulating valve can adjust the amount of air entering the mask, effectively preventing oxygen intoxication.

[0050] The respiratory pressure sensor monitors the patient's respiratory pressure in real time and determines whether the patient is coughing. When the patient coughs, the oscillation wave output is automatically terminated to avoid choking damage to the patient's internal airway. After judging that the patient's coughing has ended, the operation is automatically resumed. In other words, the airway expander has a cough protection function. When the airway expander is used for treatment, the instrument will form air oscillation waves in the patient's internal respiratory tract. If the patient coughs while there are oscillation waves in the airway, it is easy to induce stress syndromes such as wheezing, fluid choking, and local hematoma in the internal respiratory tract, resulting in treatment damage. Since the system monitors the patient's respiratory pressure in real time during treatment, the system can detect in time that the patient is about to cough before the patient coughs or in the early stage of coughing, and terminate the oscillation wave output of the instrument in time to avoid stress syndrome. After the patient finishes coughing and resumes normal breathing, the treatment will be automatically resumed. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1is a block diagram of the airway expansion device of Example 1;

[0052] Figure 2 It is the pressure waveform diagram of each part of the airflow;

[0053] Figure 3 is a schematic diagram of the airway expansion device of Example 2;

[0054] Figure 4 is a general diagram of the airway expansion device of Example 3;

[0055] Figure 5 It is the schematic diagram of the host;

[0056] Figure 6 This is the overall diagram of the airway expander (the quick docking connector is pulled out from the quick docking seat);

[0057] Figure 7 It is a cross-sectional exploded view of a quick docking joint and a quick docking seat;

[0058] Figure 8 It is a three-dimensional cross-sectional view of a quick docking connector and a quick docking seat;

[0059] Fig. 9 It is a structural diagram of the common hose, atomizer, venturi device, gas mixing ratio regulating valve, photocatalyst disinfection filter, mask, etc.;

[0060] Fig.10 It is the overall picture of the photocatalyst disinfection filter;

[0061] Fig.11 is a three-dimensional cross-sectional view of a photocatalyst disinfection filter;

[0062] Fig.12 It is an exploded view of the photocatalyst disinfection filter;

[0063] Fig.13 is a three-dimensional cross-sectional view of the mask;

[0064] Fig.14 It is a three-dimensional image of the mask. DETAILED DESCRIPTION

[0065] Embodiment 1:

[0066] See also Figure 1 In the airway expander shown, the outlet of the oxygen source or the ventilator is connected to the step-down regulator R1, which is used to step down and stabilize the airflow P0 with a certain positive pressure to form a constant pressure airflow P1 output; three branches, namely the atomization branch, the oscillation branch, and the expansion branch, are connected in parallel between the output end of the step-down regulator R1 and the inlet of the mask MR. The atomization branch, the oscillation branch, and the expansion branch can be connected to the same inlet on the mask MR, or to different inlets on the mask MR.

[0067] A nebulizer step-down regulator R2, a valve V1 and a nebulizer FG are arranged on the nebulizer branch; the nebulizer step-down regulator R2 is used to step down the constant-pressure airflow P1 to output a constant-pressure airflow P2 with a lower pressure. The constant-pressure airflow P2 serves as the input airflow of the nebulizer, flows through the nebulizer to atomize the liquid medicine in the nebulizer, and the atomized liquid medicine is mixed into the constant-pressure airflow P2 to form a drug atomization treatment airflow P21 which is output to the mask MR.

[0068] An oscillation pulse generator VR1, a waveform shaper VR2, a high-frequency pulse modulator VR3, a valve V5 and a valve V4 are arranged on the oscillation branch. The oscillation pulse generator VR1 is used to form a square wave pulse pressure airflow P3 output for the constant pressure airflow P1, and the waveform shaper VR2 is used to shape the pulse waveform of the square wave pulse pressure airflow P3, converting the steep pulse rising / falling edge with a relatively large impact force on the patient into a gentle pulse rising / falling edge with a smaller impact on the patient, thereby forming a therapeutic oscillation airflow P31 output. The high-frequency pulse modulator VR3 is used to modulate a high-frequency oscillation component on the carrier of the oscillation airflow P31. The high-frequency pulse modulator VR3 is a programmable pulse solenoid valve V6. When the valve V4 is closed and the valve V5 is opened, the high-frequency pulse modulator VR3 does not work, and the oscillation airflow P31 is directly output to the mask. When the valve V4 is opened and the valve V5 is closed, the high-frequency pulse modulator VR3 works, and the oscillation airflow P32 modulated with a high-frequency harmonic component is output to the mask MR.

[0069] A valve V5 is connected in series on the oscillation branch between the waveform shaper VR2 and the mask, and a high-frequency pulse modulator VR3 is connected in series with the valve V4 and then in parallel with the valve V5.

[0070] An expansion step-down regulator R3 and a valve V2 are provided on the expansion branch. The expansion step-down regulator R3 is used to step down the constant-pressure airflow P1 to output a constant-pressure expansion airflow P4 with a lower pressure.

[0071] The drug atomization treatment airflow P21, the oscillating airflow P31 (or the oscillating airflow P32 modulated with high-frequency harmonic components), and the constant pressure expansion airflow P4 enter the human respiratory tract through the mask MR. The mask MR is connected to a monitoring device BP for monitoring the human respiratory pressure.

[0072] The pressure waveform of each part of the air flow can be found in Figure 2 The oscillating airflow P31 is a pressure airflow that causes the patient's lungs to passively oscillate, and its oscillation frequency is higher than the human breathing frequency, so as to generate multiple oscillation peaks in one exhalation / inhalation process.

[0073] Embodiment 2:

[0074] See also Figure 3The airway expander shown in the figure has an oxygen source quick interface J1 connected to an oxygen source and a compressed air outlet of an air compressor Y1 connected to two inlets of a two-position three-way solenoid valve T1 for switching the air source, and the outlet of the two-position three-way solenoid valve T1 is connected to the inlet of a proportional pressure regulating valve B9 (a step-down regulator R1) through a solenoid valve V8. The air inlet of the air compressor Y1 is connected to a filter FT.

[0075] The constant pressure air flow P1 coming out of the outlet of the proportional pressure regulating valve B9 is divided into three paths and enters the atomization branch, the expansion branch, and the oscillation branch respectively.

[0076] The atomizing branch is provided with an electromagnetic valve V11 and a manual pressure regulating valve AD1 (an atomizing pressure reducing regulator R2) to reduce the pressure of the constant pressure airflow P1 and output a constant pressure airflow P2 with a lower pressure.

[0077] The expansion branch is provided with a solenoid valve V12 and a manual pressure regulating valve AD2 (an expansion step-down regulator R3) to step down the constant pressure airflow P1 to output a constant pressure expansion airflow P4 with a lower pressure.

[0078] The oscillation branch is provided with a two-position three-way solenoid valve T2 (an oscillation pulse generator VR1), a manual pressure regulating valve AD3 and a gas container G with adjustable capacity (a waveform shaper VR2). The two-position three-way solenoid valve T2 is repeatedly turned on and off to make the constant pressure airflow P1 form a square wave pulse pressure airflow P3 output, and then the gas container G forms an oscillating airflow P31 with smooth rising and falling edges for output.

[0079] The two-position three-way solenoid valve T2 is a normally open programmable two-position three-way solenoid valve with ports A, B and C. Port A is connected to the outlet of the proportional pressure regulating valve B9 (gas supply source higher than atmospheric pressure), and port C is connected to the atmosphere through the manual pressure regulating valve AD3 and the muffler SL. When the coil L in the two-position three-way solenoid valve T2 is not energized, the valve core is in the reset position (cut-off position), and ports B and C are connected; when the coil L is energized, the valve core is driven to move to the working position, at which time ports B and C are disconnected, and ports A and B are connected. By controlling the on and off of the coil L with frequency, a high-pressure / low-pressure pulse output of the same frequency will be formed at port B of the two-position three-way solenoid valve T2. Since the two-position three-way solenoid valve T2 is switch-controlled, the output can only be 1 or 0, so the output square wave pulse pressure airflow P3 is a square wave.

[0080] The manual pressure regulating valve AD3 has an air inlet and an air outlet. The air inlet of the manual pressure regulating valve AD3 is connected to the C port of the two-position three-way solenoid valve T2. By rotating the knob of the manual pressure regulating valve AD3, the valve core of the manual pressure regulating valve AD3 can be moved up and down, thereby changing the cross-sectional area of ​​the channel connecting its air inlet and air outlet. When the manual pressure regulating valve AD3 is fully opened, the input pressure PA (gas pressure at the air inlet) and the output pressure PB (gas pressure at the air outlet) are basically equal; when the valve core is adjusted to press down, the ventilation cross-sectional area is reduced, so that the output pressure PB is less than the input pressure PA.

[0081] The manual pressure regulating valve AD3 is used to adjust the discharge speed of the residual gas in the system to the atmosphere through the C port in the two-position three-way solenoid valve T2 via the manual pressure regulating valve AD3 and the muffler SL, when the two-position three-way solenoid valve T2 is cut off, thereby changing the waveform slope of the falling edge of the oscillation of the square wave pulse pressure airflow P3.

[0082] The silencer SL mainly increases the air resistance in the device and increases the cross-sectional area of ​​the fluid channel at the same time, so that the airflow entering the silencer SL through the air outlet of the manual pressure regulating valve AD3 encounters resistance in the device and reduces the flow rate. At the same time, due to the increase in the ventilation cross-sectional area, the flow rate is guaranteed not to decay, and the reduction in flow rate can greatly reduce the whistling noise of high-speed airflow. When the airway expander is working, the rapid gas discharge will produce a whistling sound. The silencer SL is used to ensure the discharge speed while greatly reducing the operating noise.

[0083] The controller is connected to the control ends of the two-position three-way solenoid valve T1, the solenoid valve V8, the proportional pressure regulating valve B9, the solenoid valve V11, the solenoid valve V12, and the two-position three-way solenoid valve T2 to control the actions of each valve.

[0084] The atomization pressure sensor S1, oscillation pressure sensor S3, and expansion pressure sensor S2 on the atomization branch, oscillation branch, and expansion branch for monitoring the pressures of the constant pressure airflow P2, oscillation airflow P31, and expansion airflow P4 are all electrically connected to the controller.

[0085] The controller is connected to the control circuit of the air compressor Y1 to control the start and stop of the air compressor.

[0086] The inner breathing surface of the mask has a mouthpiece inserted into the human mouth and a triple hose connected to the mouthpiece. A nebulizer FG is set on a hose RG1 (the airflow input end and airflow output end of the nebulizer FG are connected in series on the hose RG1) and quickly docked with the atomization branch after the atomization pressure sensor S1. A hose RG2 is quickly docked with the end of the oscillation expansion branch formed by parallel connection of the oscillation branch after the oscillation pressure sensor S3 and the expansion branch after the expansion pressure sensor S2. A hose RG3 is a respiratory pressure monitoring hose. The respiratory pressure monitoring hose is quickly docked with the end of the respiratory pressure tube, and a respiratory pressure sensor S4 is set on the respiratory pressure tube to monitor the patient's respiratory pressure. The respiratory pressure sensor S4 is electrically connected to the controller. The mask uses a triple hose, which can be quickly plugged in and out synchronously. The triple air pipe is a parallel air guide hose that connects the mask with the atomization branch, the oscillation expansion branch, and the pressure monitoring hose. The three hoses are: atomizing airflow duct, used to transmit the atomizing airflow output by the host; oscillating and dilating airflow duct: used to transmit the oscillating and dilating airflow output by the host; respiratory air pressure monitoring duct: used by the host to monitor the patient's respiratory airflow pressure.

[0087] If the respiratory pressure feedback from the respiratory pressure sensor S4 changes suddenly, the controller determines that the patient is coughing, and immediately controls the solenoid valve V11, solenoid valve V12, and two-position three-way solenoid valve T2 to disconnect to prevent the patient from choking. After the patient stops coughing, it returns to the working state before coughing. It can automatically monitor the patient's coughing and automatically start the choking protection function.

[0088] Embodiment 3:

[0089] See also Figure 4 The airway dilator shown includes a main unit 100 and a breathing gun 200 that can be quickly docked.

[0090] The structural block diagram of the host 100 is shown in Figure 5 (See also Figure 3 ), including an oxygen source quick interface J1, a solenoid valve V8, a proportional pressure regulating valve B9, a solenoid valve V11, a manual pressure regulating valve AD1, a solenoid valve V12, an atomization pressure sensor S1, a manual pressure regulating valve AD2, a two-position three-way solenoid valve T2, an expansion pressure sensor S2, a manual pressure regulating valve AD3, a gas container G with adjustable capacity, an oscillation pressure sensor S3, etc. The oxygen source quick interface J1 connected to the oxygen source is connected to the inlet of the proportional pressure regulating valve B9 through the solenoid valve V8. The structure of the main unit is the same as the relevant content described in Example 2 and will not be described again. It should be noted that the main unit in this Example 3 is different from that in Example 2 in that the atomization branch, the oscillation expansion branch, and the breathing pressure tube after the atomization pressure sensor S1 are connected together on a quick docking seat DJ1, and the quick docking seat DJ1 is fixed on the outer shell of the main unit 100.

[0091] See also Figure 6 The breathing gun 200 is mainly composed of a quick-connect joint 2, a common hose 3, a nebulizer 4, a venturi device 5, a gas mixing ratio regulating valve 6, a photocatalyst disinfection filter 7, and a mask 8.

[0092] See also Figure 7 , 8 The quick-connect joint 2 includes a cover plate 21, a filter membrane support plate 22 connected to the cover plate (the cover plate 21 and the filter membrane support plate 22 are equivalent to the quick-connect joint housing), a filter membrane 23 arranged between the cover plate and the filter membrane support plate, and an internal space surrounded by the cover plate and the filter membrane support plate to form an atomization filter chamber 24, an oscillation expansion filter chamber 25, and a respiratory pressure monitoring filter chamber 26 that are not connected to each other in the circumferential direction. The outer side of the filter membrane support plate is provided with an atomization docking pipe 27, an oscillation expansion docking pipe 28, and a respiratory pressure monitoring docking pipe 29 extending outward and communicating with the atomization filter chamber, the oscillation expansion filter chamber, and the respiratory pressure monitoring filter chamber respectively. At least two sealing rings are arranged on the outer periphery of the atomization docking pipe 27, the oscillation expansion docking pipe 28, and the respiratory pressure monitoring docking pipe 29.

[0093] The quick docking connector 2 can be quickly plugged and unplugged with the quick docking seat DJ1. After the two are docked, the atomizing docking tube 27, the oscillating expansion docking tube 28, and the respiratory pressure monitoring docking tube 29 are sealed and contacted with the atomizing branch, the oscillating expansion branch, and the respiratory pressure tube respectively. The outer side of the cover plate 21 has an atomizing hose interface, an oscillating expansion hose interface, and a respiratory pressure monitoring hose interface extending outward and communicating with the atomizing filter chamber, the oscillating expansion filter chamber, and the respiratory pressure monitoring filter chamber respectively; the atomizing hose interface, the oscillating expansion hose interface, and the respiratory pressure monitoring hose interface are respectively connected to the atomizing hose 31, the oscillating expansion hose 32, and the respiratory pressure monitoring hose 33 in the common hose 3.

[0094] There is a locking and unlocking switch between the quick-connect joint and the quick-connect seat. Its function is that when the quick-connect joint is inserted into the quick-connect seat, the three functional air tubes of the breathing gun (atomization connection tube 27, oscillation expansion connection tube 28, and respiratory pressure monitoring connection tube 29) can be quickly connected to the host. At the same time, the locking mechanism automatically locks and seals the quick-connect joint and the host. When the quick-connect joint needs to be separated from the host, the unlocking switch needs to be pressed to separate the quick-connect joint and the host. The quick-connect joint has an insertion direction limiting tenon to prevent the quick-connect joint from being misplaced when inserted into the quick-connect seat. Locking and unlocking switches, tenons, etc. belong to the prior art.

[0095] There is a filter cavity and filter membrane inside the connector to isolate the air source output by the host from the patient's breathing, preventing cross-infection of respiratory media between the host and the patient.

[0096] The common air pipe is a three-way parallel air guide hose, which connects the quick-connect connector with the atomizer and the Venturi device.

[0097] The three parallel air guide hoses are respectively an atomizing hose 31, an oscillating expansion hose 32, and a respiratory pressure monitoring hose 33, which are respectively used for transmitting the atomizing airflow output by the host, for transmitting the oscillating and expanding airflow output by the host, and for the host to monitor the respiratory airflow pressure of the patient.

[0098] See also Fig. 9 The venturi device 5 includes an inlet pipe 51 and an outlet pipe 53 which are connected through a throat pipe 52, and the inner diameters of the inlet pipe and the outlet pipe are both larger than the inner diameter of the throat pipe.

[0099] The atomizing hose 31 is connected to the airflow input end of the atomizer 4. An inlet is opened on the outer periphery of the inlet pipe 51, which is connected to the airflow output end of the atomizer 4. The oscillation expansion hose 32 passes through the inlet pipe 51 along the axial direction (but there is a gap between the oscillation expansion hose 32 and the inlet pipe 51), and extends into the front part of the throat; the respiratory pressure monitoring hose 33 passes through the inlet pipe and the outlet pipe, and the end of the respiratory pressure monitoring hose 33 is at the outlet of the outlet pipe 53.

[0100] The nebulizer is connected to the atomizing air pressure transmitted by the main unit, which atomizes the liquid medicine in the medicine chamber and transmits it to the mask to be inhaled by the patient.

[0101] The Venturi device adopts the Venturi principle. When the oscillating expansion airflow is introduced, negative pressure is formed, and ambient air is inhaled through the gap between the oscillating expansion hose 32 and the inlet pipe 51 to dilute the pure oxygen flow output by the host, thereby preventing the patient from inhaling pure oxygen for a long time and causing oxygen poisoning.

[0102] The outlet of the outlet pipe 53 is connected to the mask 8 through the gas mixing ratio regulating valve 6 and the photocatalyst disinfection filter 7. The gas mixing ratio regulating valve 6 is used to adjust the amount of air that enters the photocatalyst disinfection filter 7 (and the mask 8) through the gas mixing ratio regulating valve, thereby changing the ratio of the amount of air to the amount of gas (mainly oxygen) coming out of the outlet pipe. Since different patients have different tolerances to pure oxygen, for patients with weaker tolerance to pure oxygen, the air ratio can be increased by adjusting the gas mixing ratio regulating valve during treatment to perform adaptive treatment.

[0103] Because different patients / different diseases have different requirements for the concentration of pure oxygen dilution, on the basis of the pure oxygen mixed and diluted in the Venturi tube, a gas mixing regulating valve is also arranged at the outlet of the Venturi device outlet pipe to compensate for the insufficient gas mixing in the Venturi tube to adapt to different patients / diseases.

[0104] The outlet of the venturi device outlet pipe can be directly connected to the photocatalyst disinfection filter / or mask.

[0105] See also Figure 10-12The photocatalyst disinfection filter 7 includes a housing 71 with openings at both ends, one end of the housing opening is connected to the mask, and the other end of the housing opening is connected to the outlet of the outlet pipe 53 through the gas mixing ratio regulating valve 6. Inside the housing 71, there is a filter membrane 72 coated with a photocatalyst and a photocatalyst trigger control board 73 arranged on opposite sides of the filter membrane 72. The photocatalyst trigger control board 73 is electrically connected to an ultraviolet lamp 74, a disinfection start switch 75 and a power supply battery 76. The housing 71 can be a soft housing to trigger the disinfection start switch 75, turn on the ultraviolet lamp 74, and emit ultraviolet rays to irradiate the photocatalyst on the filter membrane.

[0106] The photocatalyst disinfection filter is composed of a housing with a chamber, a photocatalyst filter membrane, a photocatalyst light source and a photocatalyst controller. The photocatalyst filter membrane inside the chamber isolates the patient from the external ambient air to prevent the bacteria in the treatment airflow mixed with the ambient air from infecting the patient. The photocatalyst light source and the photocatalyst controller are used to trigger the disinfection function of the photocatalyst.

[0107] See also Fig.13 , 14 The mask 8 is mainly used to fit on the human face. The upper inner side of the mask 8 is provided with a nose clip 81 for clamping the nose to prevent nasal breathing, and the upper outer side of the mask 8 is provided with a pressing knob 82.

[0108] The mask is the patient's breathing interface. The main function of the mask is to force the patient to breathe through the mouth, prevent the patient from breathing through the nose, and ensure that the therapeutic airflow output by the host can all pass through the patient's mouth and enter the patient's internal respiratory tract.

[0109] Of course, the gas mixing ratio regulating valve 6 may be omitted. In this case, the outlet of the outlet pipe 53 can be directly connected to the opening of one end of the housing 71 of the photocatalyst disinfection filter 7 .

[0110] The innovative features of the present invention are as follows:

[0111] The airway dilator can perform segmented programmable fully automatic treatment. It can be segmented and programmed to achieve formula combination treatment according to the patient's condition; during treatment, oscillation, expansion, and atomization can be freely combined; different treatments are implemented in segments, and each segment is automatically connected in series.

[0112] Mouthpiece disinfection and filtration consumables can be used in ventilators, lung function trainers, lung function testers and other instruments involving internal respiratory tract treatment and monitoring.

[0113] The high-frequency modulation function modulates the high-frequency energy that adapts to the resonant frequency of secretions of different viscosities on the low-frequency fundamental wave of the oscillating airflow, thereby improving the treatment effect.

[0114] The cough protection function automatically detects the patient's coughing movements by monitoring the patient's respiratory pressure waveform. When the patient coughs, the oscillation wave output is automatically terminated to avoid choking damage to the patient's internal airway. After determining that the patient's coughing has ended, the system automatically resumes operation.

[0115] The patient's breathing direction, frequency and oscillation input are automatically synchronized and / or phase-shifted. By controlling the on-off timing and time of the two-position three-way solenoid valve T2, the phase and frequency of the square wave pulse pressure airflow P3 and the oscillating airflow P31 can be controlled.

[0116] A nose clip prevents nasal breathing.

[0117] Multiple gas source selection function.

[0118] If equipped with a battery-powered / car-powered miniature air compressor / or a miniature carbon fiber oxygen cylinder (oxygen source), it can be used mobile (such as placed in a mobile ambulance).

Claims

1. Airway expansion device, its characteristics are: It includes a step-down regulator R1, three branches, namely, an atomization branch, an oscillation branch, and an expansion branch; the step-down regulator R1 is used to step down and stabilize the airflow P0 with a certain positive pressure to form a constant pressure airflow P1 output; The three branches are connected in parallel at the output end of the buck regulator R1; The atomization branch is provided with an atomization step-down regulator R2 and a nebulizer; the atomization step-down regulator R2 is used to step down the constant-pressure airflow P1 and output it into a constant-pressure airflow P2 with a lower pressure; the constant-pressure airflow P2 is used as the input airflow of the nebulizer, flows through the nebulizer to atomize the liquid medicine in the nebulizer, and the liquid medicine is atomized and mixed into the constant-pressure airflow P2 to form a drug atomization treatment airflow P21 for output; An oscillation pulse generator VR1 and a waveform shaper VR2 are provided on the oscillation branch; the oscillation pulse generator VR1 is used to form a square wave pulse pressure airflow P3 output for the constant pressure airflow P1, and the waveform shaper VR2 is used to shape the pulse waveform of the square wave pulse pressure airflow P3 to form an oscillation airflow P31 output with a smooth pulse rising edge and falling edge; An expansion step-down regulator R3 is provided on the expansion branch, and the expansion step-down regulator R3 is used to step down the constant pressure airflow P1 to output a constant pressure expansion airflow P4 with a lower pressure; The outlet of the atomizing step-down regulator R2 is communicated with the atomizing docking seat, the atomizing docking joint pluggably connected to the atomizing docking seat is communicated with the airflow input end of the atomizer through the atomizing hose, and the airflow output end of the atomizer is communicated with the mask; The outlet of the waveform shaper VR2 is connected in parallel with the outlet of the expansion buck regulator R3 and communicates with the oscillation expansion docking seat, and the oscillation expansion docking head pluggably connected to the oscillation expansion docking seat communicates with the mask through the oscillation expansion hose; The end of the respiratory pressure monitoring hose communicated with the mask is connected with a respiratory pressure monitoring joint, which is pluggable and connected to the respiratory pressure monitoring docking seat, which is communicated with the respiratory pressure pipe, and the respiratory pressure pipe is provided with a respiratory pressure sensor electrically connected to the controller for monitoring the respiratory pressure of the human body; The atomizing joint, the oscillating expansion joint, and the respiratory pressure monitoring joint are jointly arranged on a quick docking joint, and the atomizing docking seat, the oscillating expansion docking seat, and the respiratory pressure monitoring docking seat are jointly arranged on a quick docking seat; after the quick docking joint is docked with the quick docking seat, the atomizing joint, the oscillating expansion joint, and the respiratory pressure monitoring joint are in sealing contact with the atomizing docking seat, the oscillating expansion docking seat, and the respiratory pressure monitoring docking seat respectively; The quick docking connector includes a cover plate, a filter membrane support plate opposite to the cover plate, and a filter membrane arranged between the cover plate and the filter membrane support plate. The cover plate, the filter membrane and the filter membrane support plate form an atomization filter chamber, an oscillation expansion filter chamber, and a respiratory pressure monitoring filter chamber that are not connected to each other in the circumferential direction; the outer side of the filter membrane support plate is provided with an atomization docking tube, an oscillation expansion docking tube, and a respiratory pressure monitoring docking tube extending outward and respectively connected to the atomization filter chamber, the oscillation expansion filter chamber, and the respiratory pressure monitoring filter chamber; after the quick docking connector is docked with the quick docking seat, the atomization docking tube, the oscillation expansion docking tube, and the respiratory pressure monitoring docking tube are respectively in sealing contact with the atomization docking seat, the oscillation expansion docking seat, and the respiratory pressure monitoring docking seat; the atomization hose, the oscillation expansion hose, and the respiratory pressure monitoring hose are respectively connected to the atomization filter chamber, the oscillation expansion filter chamber, and the respiratory pressure monitoring filter chamber.

2. The airway expansion device as claimed in claim 1, characterized in that: The oscillation branch also includes a high-frequency pulse modulator VR3 connected to the output end of the waveform shaper VR2. The high-frequency pulse modulator VR3 is used to modulate a high-frequency oscillation component on the carrier of the oscillating airflow P31.

3. The airway expansion device as claimed in claim 2, characterized in that: Two branches are connected in parallel at the output end of the waveform shaper VR2, one branch is connected in series with a valve V5, and the other branch is connected in series with a high-frequency pulse modulator VR3 and a valve V4.

4. The airway expansion device as claimed in claim 2, characterized in that: The high frequency pulse modulator VR3 is the solenoid valve V6.

5. The airway expansion device as claimed in claim 1, characterized in that: The oscillation pulse generator VR1 is a two-position three-way solenoid valve T2. The two-position three-way solenoid valve T2 is repeatedly turned on and off to make the constant pressure airflow P1 form a square wave pulse pressure airflow P3 output; the waveform shaper VR2 is a container with a certain capacity.

6. The airway expansion device as claimed in claim 1, characterized in that: The atomizing step-down regulator R2 and the expanding step-down regulator R3 are both pressure regulating valves.

7. The airway expansion device as claimed in claim 1, characterized in that: It also includes a controller. The atomization branch, the expansion branch, and the oscillation branch are respectively provided with an electromagnetic valve V11, an electromagnetic valve V12, and a two-position three-way electromagnetic valve T2. The controller is electrically connected to the electromagnetic valve V11, the electromagnetic valve V12, and the two-position three-way electromagnetic valve T2 to control the switching of each electromagnetic valve; when the electromagnetic valve on any branch is closed, there is no airflow output in the branch.

8. The airway expansion device as claimed in claim 7, characterized in that: It also includes pressure sensors arranged on the atomization branch, the oscillation branch, and the expansion branch for monitoring the pressure of the constant pressure airflow P2, the pressure of the oscillating airflow P31, and the pressure of the expansion airflow P4 respectively, and each pressure sensor is electrically connected to the controller.

9. The airway expansion device as claimed in claim 1, characterized in that: The air flow P0 with a certain positive pressure includes an oxygen source and a compressed air source, which are connected to two inlets of a two-position three-way solenoid valve T1 for air source switching through pipelines, and the outlet of the two-position three-way solenoid valve T1 is connected to the inlet of the step-down regulator R1.

10. The airway expansion device as claimed in claim 1, characterized in that: It also includes a mask for attaching to the human face, a nose clip for clamping the nose wings, and a triple hose connected to the mask; a hose RG1 is provided with an atomizer FG and is connected to the atomization branch after the atomization step-down regulator R2, a hose RG2 is connected to the oscillation expansion branch formed by connecting the oscillation branch after the waveform shaper VR2 and the expansion branch after the expansion step-down regulator R3 in parallel, and a hose RG3 is a respiratory pressure monitoring hose.

11. The airway expansion device as claimed in claim 1, characterized in that: The atomizing butt joint, the oscillating expansion butt joint and the respiratory pressure monitoring butt joint are all provided with filter membranes for filtering the gas entering and exiting the atomizing butt joint, the oscillating expansion butt joint and the respiratory pressure monitoring butt joint.

12. The airway dilator according to claim 1 or 11, characterized in that: A photocatalyst disinfection filter for disinfecting the passing gas is arranged on the pipelines connecting the airflow output end of the nebulizer, the oscillation expansion hose, the respiratory pressure monitoring hose and the mask.

13. The airway expansion device as claimed in claim 12, characterized in that: The photocatalyst disinfection filter includes a shell with openings at both ends. One end of the shell is connected to the mask, and the other end is connected to the airflow output end of the nebulizer, the oscillation expansion hose, and the respiratory pressure monitoring hose. Inside the shell are a filter membrane coated with a photocatalyst and a photocatalyst trigger control board. The photocatalyst trigger control board is electrically connected to an ultraviolet lamp. When the photocatalyst trigger control board controls the ultraviolet lamp to work, ultraviolet rays are emitted to irradiate the photocatalyst on the filter membrane.

14. The airway expansion device according to claim 1 or 11, characterized in that: It also includes a Venturi device, which includes an inlet pipe and an outlet pipe connected through a throat, the inner diameters of the inlet pipe and the outlet pipe are both larger than the inner diameter of the throat; an inlet connected to the airflow output end of the atomizer is opened on the outer periphery of the inlet pipe; the oscillation expansion hose passes through the inlet pipe along the axial direction and extends into the front part of the throat; the end of the respiratory pressure monitoring hose extends to the outlet of the outlet pipe; the outlet of the outlet pipe is connected to the mask.

15. The airway dilator as claimed in claim 14, characterized in that: It also includes a photocatalyst disinfection filter; the photocatalyst disinfection filter includes a shell with openings at both ends, one end of the shell is connected to the mask, and the other end is connected to the outlet of the outlet pipe. Inside the shell are a filter membrane coated with a photocatalyst and a photocatalyst trigger control board, and the photocatalyst trigger control board is electrically connected to an ultraviolet lamp; when the photocatalyst trigger control board controls the ultraviolet lamp to work, ultraviolet rays are emitted to irradiate the photocatalyst on the filter membrane to disinfect the passing gas.

16. The airway dilator as claimed in claim 14, characterized in that: An air mixing ratio regulating valve is arranged between the outlet of the outlet pipe and the mask, which is used to adjust the ratio of the air volume entering the mask through the outlet pipe and the air volume entering the mask through the air mixing ratio regulating valve.

17. The airway dilator according to claim 1 or 11, characterized in that: A nose clip for clamping the nose to prevent nasal breathing is arranged on the inner side of the mask that fits the human face.

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