Breathing machine and air capacity buffer for breathing machine

Abstract

The invention discloses a breathing machine and an air capacity buffer for the breathing machine, and belongs to the technical field of medical instruments.The breathing machine comprises a breathing machine body, an air collecting module is arranged inside and outside a vent hole, and a data processing module, a calculation module and a control module are arranged outside the breathing machine body; according to the breathing machine, exhaled gas is collected and analyzed through the gas collection module, the data processing module, the calculation module and the control module, and finally the gas output and the warning lamp are controlled; the breathing state and the nasal obstruction degree in nasal obstruction can be judged according to the speed and the flow of gas exhausted by the mask, the gas supply speed can be adjusted when the nasal obstruction degree is within a controllable range so as to guarantee the comfort of a patient, and meanwhile, if the patient is unsmooth in breathing due to nasal obstruction or secretion blockage, medical staff can be reminded in time.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and more particularly, to a ventilator and an air capacitance buffer for a ventilator. Background Art

[0002] A ventilator is an important medical device mainly used to assist or replace a patient in breathing, especially when the patient's ability to breathe independently is impaired or lost. The ventilator transmits oxygen or a gas mixture to the patient's lungs to maintain the patient's vital signs. Its working principle is to generate a certain gas flow to send oxygen or a gas mixture into the patient's lungs to achieve gas exchange, that is, to transmit oxygen into the blood and at the same time discharge carbon dioxide out of the body.

[0003] When a patient uses a ventilator, some problems may occur, resulting in unsmooth respiratory tract, which in turn affects the normal operation of the ventilator and the patient's comfort. For example, nasal congestion and secretions formed by respiratory diseases (such as lung infections) can all block the smooth entry of the air flow sent by the ventilator into the respiratory tract, resulting in a significant reduction in the therapeutic effect of the ventilator and failing to achieve the expected ventilation support purpose.

[0004] In the prior art, since the valves used in ventilators are usually one-way valves to prevent gas backflow, nasal congestion in patients is generally treated in advance, but nasal congestion will still occur subsequently. If the gas transmission volume cannot be adjusted in time, it is difficult to ensure that the patient can obtain sufficient oxygen supply and maintain effective ventilation. Summary of the Invention

[0005] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a ventilator and an air capacitance buffer for a ventilator.

[0006] To solve the above problems, the present invention adopts the following technical solutions, which can realize judging the breathing state and nasal congestion degree when nasal congestion occurs according to the gas discharge speed and gas flow rate of the mask, and can adjust the air supply speed when the nasal congestion degree is within a controllable range to ensure the patient's comfort. At the same time, if the patient has unsmooth breathing due to nasal congestion or being blocked by secretions, it can also give a timely reminder to medical staff.

[0007] A ventilator includes a ventilator body and a one-way valve provided on the front surface of the ventilator body. An air pipe group is provided on the front surface of the ventilator body. One of the delivery pipes of the air pipe group is communicated with the one-way valve, and the other delivery pipe of the air pipe group is communicated with a mask at the end far away from the ventilator body. An exhaust hole is penetrated through the upper side of the mask, and a warning light is provided on the outer side of the ventilator body; A gas collection module is jointly provided inside and outside the exhaust hole, and a data processing module, a calculation module, and a control module are provided outside the ventilator body; Gas collection module: It includes a gas flow meter for collecting the flow velocity and flow rate of the gas discharged from the exhaust hole, and a gas flow meter for collecting the gas flow rate discharged from the exhaust hole, and transmits the collected data to the data processing module; Data processing module: It is used to analyze the gas flow velocity and flow rate collected by the gas collection module, transmit the analyzed data to the calculation module, receive and analyze the data transmitted by the calculation module, and then transmit the data to the control module again; Calculation module: It is used to control the gas flow rate transmitted by the one-way valve according to the data transmitted by the data processing module, and transmit the calculated data to the data processing module; Control module: It is used to receive the data that has been calculated by the calculation module and transmitted by the data processing module, and control the gas delivery volume and the turning on of the warning light according to the data.

[0008] Furthermore, the calculation module calculates the velocity of the gas discharged from the exhaust hole according to the data transmitted by the gas collection module through the following formula: ×S; Wherein, Q is the flow rate of the gas when it is discharged from the exhaust hole, A is the area of the exhaust hole, is the pressure difference before and after the exhaust hole, is the density of the gas, is the flow coefficient, and S is the total duration of the gas discharge; The calculation module calculates the gas flow velocity according to the gas discharge flow rate through the following formula: ; ; When V > > ; Wherein, V is the gas flow velocity, is the flow velocity of the gas peak, is the preset flow velocity of the gas. When V > or V < , the control module will turn on the warning light. When > V > , the gas delivery volume is reduced to control the tidal volume (the volume of gas inhaled or exhaled each time during quiet breathing) at about a 1 / 2 inhalation / exhalation ratio.

[0009] Further, the air delivery pipe group is composed of two delivery pipes. A locking component is provided on the upper side of the mask. The locking component includes a fixed cylinder fixedly connected to the upper side of the mask. A fixed disk is fixedly connected to the lower side inside the fixed cylinder. A rotating disk is rotatably connected to the upper side inside the fixed cylinder. Fixed rings are fixedly connected to the outer side of the rotating disk in an annular array. The rotating disk is rotatably connected inside the fixed cylinder through a rotating ring. The shapes of the fixed disk and the rotating disk are both adapted to the inside of the fixed cylinder. Arc-shaped grooves are penetrated from top to bottom in an annular array inside the fixed disk and the rotating disk. The arc-shaped grooves corresponding to each other up and down are arranged in reverse dislocation. A connecting column is slidably connected to the arc-shaped grooves corresponding to each other up and down. A clamping piece is fixedly connected to the outer side of the connecting column. The clamping pieces are in a hollow cylindrical shape after being closed together.

[0010] Further, through holes are commonly penetrated through the centers of the rotating disk and the fixed disk. The through holes are communicated with the inside of the mask. A sealing ring is arranged inside the through holes. A plugging cover is clamped inside the upper through hole through the sealing ring.

[0011] Further, a cleaning component is provided inside the mask. The cleaning component includes electric push rods arranged on the left and right sides of the front and rear parts inside the mask.

[0012] Further, moisture absorption strips are commonly fixedly connected to the output ends of the electric push rods corresponding to each other left and right. Moisture absorption blocks are fixedly connected to the left and right sides of the opposite surfaces of the moisture absorption strips corresponding to each other front and rear. The upper sides of the moisture absorption strips and the moisture absorption blocks are both in sliding and pressing contact with the inner side wall of the mask.

[0013] An air capacitance buffer, including an air capacitance buffer, is provided at the front end of the ventilator body. Vibration damping orifice plates are arranged in parallel at the center inside the air capacitance buffer. The aperture of the vibration damping orifice plates increases from left to right.

[0014] Further, the two sides of the air capacitance buffer are respectively communicated with two air delivery pipes. The air capacitance buffer is communicated with the mask through the air delivery pipes.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: In the present invention, the exhaled gas is collected and analyzed through the provided gas collection module, data processing module, calculation module and control module, and finally the air output volume and the warning lamp are controlled. When the ventilator body continuously supplies oxygen or a mixed gas to the patient through a one-way valve, the breathing state and the nasal congestion degree when in nasal congestion can be judged according to the speed and gas flow of the gas discharged from the mask, and the air supply speed can be adjusted when the nasal congestion degree is within a controllable range to ensure the comfort of the patient. At the same time, if the patient has difficulty breathing due to nasal congestion or being blocked by secretions, the medical staff can also be reminded in time.

[0016] After the rotating disk provided in the present invention rotates, it can drive the connecting rod to drive the clamping pieces to gather together and lock the pipe for extracting secretions. Since the pipe for extracting secretions can be directly inserted into the mask, when extracting the pipe secretions of the patient, the oxygen supply efficiency of the patient can still be guaranteed to avoid the aggravation of the patient's condition due to insufficient oxygen supply.

[0017] The present invention processes the water mist inside the mask through the provided moisture absorption strip and moisture absorption block. Since the water mist attached to the inside of the mask can be processed in time, it effectively prevents the water mist from condensing into water droplets after attaching to the inside of the mask, avoiding the water droplets from dripping onto the patient's nose or face when the patient turns over at night or uses it, and also avoiding the patient from being awakened due to suddenly contacting the water droplets, thus guaranteeing the patient's sleep quality. Brief Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic structural diagram of the mask of the present invention; Figure 3 is a front view sectional structural diagram of the mask of the present invention; Figure 4 is a partial structural explosion diagram of the locking component of the present invention; Figure 5 is a partially enlarged schematic diagram of the fixed cylinder of the present invention; Figure 6 is a front view sectional structural diagram of the air capacitance buffer of the present invention; Figure 7 is a front view sectional structural diagram of the vibration damping orifice plate of the present invention; Figure 8 is a partial working framework schematic diagram of the gas collection module, data processing module, calculation module and control module of the present invention; Figure 9 is a working process schematic diagram of the gas collection module, data processing module, calculation module and control module of the present invention.

[0019] Explanation of the reference numerals in the drawings: 1. Ventilator body; 101. Check valve; 102. Air pipe group; 103. Mask; 12. Gas collection module; 13. Data processing module; 14. Calculation module; 15. Control module; 16. Exhaust hole; 17. Warning lamp; 2. Locking component; 21. Fixed cylinder; 22. Fixed disk; 2 thirty-three. Rotating disk; 24. Fixed ring; 241. Sealing cover; 25. Arc groove; 26. Connecting column; 27. Clamping piece; 28. Through hole; 29. Sealing ring; 3. Cleaning component; 31. Electric push rod; 32. Moisture absorption strip; 33. Moisture absorption block; 4. Air capacitance buffer; 41. Vibration damping orifice plate. Specific embodiments

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1 to 9 , a ventilator and an air capacitance buffer for a ventilator, including a ventilator body 1 and a one-way valve 101 provided on the front of the ventilator body 1. An air pipe group 102 is provided on the front of the ventilator body 1. One of the delivery pipes of the air pipe group 102 is connected to the one-way valve 101, and the other delivery pipe of the air pipe group 102 is connected to a face mask 103 at the end far from the ventilator body 1. An exhaust hole 16 is penetrated and opened on the upper side of the face mask 103, and a warning light 17 is provided on the outside of the ventilator body 1; A gas collection module 12 is jointly provided inside and outside the exhaust hole 16, and a data processing module 13, a calculation module 14, and a control module 15 are provided outside the ventilator body 1; Gas collection module 12: It includes an air velocity meter for collecting the gas flow velocity and flow rate of the gas discharged from the exhaust hole 16, and a gas flow meter for collecting the gas flow rate of the gas discharged from the exhaust hole 16, and transmits the collected data to the data processing module 13; Data processing module 13: It is used to analyze the gas flow velocity and flow rate collected by the gas collection module 12, transmit the analyzed data to the calculation module 14, receive and analyze the data transmitted by the calculation module 14, and then transmit the data to the control module 15 again; Calculation module 14: It is used to control the gas flow rate transmitted by the one-way valve 101 according to the data transmitted by the data processing module 13, and transmit the calculated data to the data processing module 13; Control module 15: It is used to receive the data that has been calculated by the calculation module 14 and transmitted by the data processing module 13, and control the air delivery volume and the activation of the warning light 17 according to the data; The calculation module 14 calculates the speed of the gas discharged from the exhaust hole 16 according to the data transmitted by the gas collection module 12 through the following formula: ×S; Among them, Q is the flow rate of the gas when it is discharged from the exhaust hole 16, A is the area of the exhaust hole 16, is the pressure difference before and after the exhaust hole 16, is the density of the gas, where \(C\) is the flow coefficient and \(S\) is the total duration of gas discharge; The calculation module 14 calculates the gas flow velocity according to the gas discharge flow through the following formula: ; ; When \(V>\) >\( ; where \(V\) is the gas flow velocity, is the flow velocity of the gas peak, is the preset flow velocity of the gas. When \(V>\) or \(V<\) , the control module 15 will turn on the warning light 17. When >\(V>\) , the gas delivery volume is reduced so that the tidal volume (the volume of gas inhaled or exhaled during each quiet breath) is controlled at about a 1 / 2 inhalation / exhalation ratio.

[0022] The gas pipeline group 102 consists of two delivery pipes.

[0023] By adopting the above technical solution, after the face mask 103 is worn on the patient's face, the gas delivered by the ventilator body 1 will be delivered to the inside of the gas delivery pipe group 102 through the one-way valve 101. Since one of the delivery pipes of the gas delivery pipe group 102 is communicated with the face mask 103, the gas delivered by the ventilator body 1 will always enter the inside of the face mask 103 and continuously supply oxygen or mixed gas to the patient to achieve gas exchange. The gas exhaled by the patient will be temporarily stored inside the face mask 103 and finally discharged through the exhaust hole 16. If the patient still has nasal congestion during the use process, the efficiency of exhaled gas and inhaled oxygen and mixed gas will be affected. During the process of the exhaled gas being discharged through the exhaust hole 16, the gas will pass through the gas collection module 12, and the gas collection module 12 will collect the flow rate and gas flow of the discharged gas within a specified time and transmit the collected data to the data control module 15. When the data processing module 13 analyzes the flow rate and gas flow of the gas, it will transmit the data to the calculation module 14. The calculation module 14 will calculate the flow rate and gas flow of the gas and transmit the calculated data to the data processing module 13. At this time, the data processing module 13 analyzes the calculated data. When the calculated data is between the preset value and the peak value, it indicates that the nasal congestion degree of the patient is within the controllable range, and the data processing module 13 transmits the data to the control module 15. At this time, the control module 15 will control the delivery frequency of oxygen and mixed gas by the one-way valve 101 so that the ratio of the oxygen or mixed gas inhaled by the patient to the exhaled gas ratio always remains at about 1 / 2. If the calculated data is greater than the peak value or less than the preset value, it indicates that the patient's breathing state is affected by nasal congestion or the gas supply speed of the ventilator body 1. The data processing module 13 transmits the data to the control module 15. At this time, the control module 15 will activate the warning light 17 to give a warning. Since the ventilator body 1 continuously supplies oxygen or mixed gas to the patient through the one-way valve 101, it can judge the breathing state and nasal congestion degree during nasal congestion according to the discharge speed and gas flow of the face mask 103, and can adjust the gas supply speed when the nasal congestion degree is within the controllable range to ensure the comfort of the patient. At the same time, if the patient has difficulty breathing due to nasal congestion or being blocked by secretions, it can also timely remind the medical staff.

[0024] As Figures 1 to 4 shown, a locking component 2 is provided on the upper side of the face mask 103. The locking component 2 includes a fixed cylinder 21 fixedly connected to the upper side of the face mask 103.

[0025] A fixed disk 22 is fixedly connected to the lower side inside the fixed cylinder 21. A rotating disk 23 is rotatably connected to the upper side inside the fixed cylinder 21. Fixed rings 24 are fixedly connected to the outer side of the rotating disk 23 in an annular array. The rotating disk 23 is rotatably connected inside the fixed cylinder 21 through a rotating ring. The shapes of the fixed disk 22 and the rotating disk 23 are both adapted to the inside of the fixed cylinder 21. Arc-shaped grooves 25 are vertically and annularly arrayed and penetrated from top to bottom inside the fixed disk 22 and the rotating disk 23. The upper and lower corresponding arc-shaped grooves 25 are arranged in reverse dislocation. A connecting column 26 is slidably connected to the upper and lower corresponding arc-shaped grooves 25. A clamping piece 27 is fixedly connected to the outer side of the connecting column 26. After the clamping pieces 27 are closed together, they form a hollow cylindrical shape.

[0026] A through hole 28 is commonly penetrated through the centers of the rotating disk 23 and the fixed disk 22. The through hole 28 is communicated with the inside of the face mask 103. A sealing ring 29 is arranged inside the through hole 28. A plugging cover 241 is clamped in the upper through hole 28 through the sealing ring 29.

[0027] By adopting the above technical solution, when the ventilator body 1 provides oxygen or mixed gas for a patient, if the patient has secretions blocking the respiratory tract, it is necessary to timely deal with the secretions blocking the respiratory tract. To ensure the efficiency of continuous oxygen supply for the patient, the plugging cover 241 clamped inside the through hole 28 in the rotating disk 23 can be taken out. Subsequently, the pipe for extracting secretions is inserted into the rotating disk 23. As the pipe for extracting secretions passes through the fixed disk 22 and the face mask 103 and is inserted into the patient's respiratory tract, the rotating disk 23 can be rotated. At this time, the rotating disk 23 makes a circular rotation inside the fixed cylinder 21 through the rotating ring on its outer side. As the rotating disk 23 starts to rotate counterclockwise, since the arc-shaped grooves 25 above and below have the same shape and bending radian and opposite directions, the connecting column 26 inside the upper arc-shaped groove 25 will start to slide along the track of the arc-shaped groove 25. At this time, the connecting column 26 inside the lower arc-shaped groove 25 is restricted by the arc-shaped groove 25, so that the four connecting columns 26 start to gather inward, and the clamping pieces 27 fixed on the outside gather toward the middle to form a hollow cylindrical shape and wrap around the outside of the pipe for extracting secretions. At the same time, when the pipe for extracting secretions passes through the through hole 28, the sealing ring 29 inside the through hole 28 wraps around the outside of the pipe for extracting secretions, so that the space between the through hole 28 and the outer wall of the pipe for extracting secretions is in a sealed state. After the pipe for extracting secretions is taken out, the plugging cover 241 can be inserted into the through hole 28 inside the rotating disk 23 again and contact the sealing ring 29, so that the space between the through hole 28 and the outer wall of the plugging cover 241 is in a sealed state. Since the pipe for extracting secretions can be directly inserted into the face mask 103, the efficiency of oxygen supply for the patient can still be ensured when extracting the secretions from the patient's respiratory tract through the pipe, so as to avoid the patient's condition from worsening due to insufficient oxygen supply.

[0028] As Figure 2 and Figure 3 shown, a cleaning component 3 is provided inside the face mask 103. The cleaning component 3 includes electric push rods 31 arranged on the left and right sides of the front and rear parts inside the face mask 103.

[0029] Moisture absorption strips 32 are fixedly connected to the output ends of the electric push rods 31 corresponding to each other left and right. Moisture absorption blocks 33 are fixedly connected to the left and right sides of the opposite surfaces of the moisture absorption strips 32 corresponding to each other front and rear. The upper sides of the moisture absorption strips 32 and the moisture absorption blocks 33 are in sliding and pressing contact with the inner side wall of the face mask 103.

[0030] By adopting the above technical solution, during the continuous oxygen supply process of the patient, the control module 15 starts the electric push rod 31 after the calculation module 14 calculates the gas each time, so that the electric push rod 31 pushes the moisture absorption strip 32 fixedly connected thereto. When the moisture absorption strip 32 moves, the moisture absorption block 33 fixed to it will also move. Since both the moisture absorption strip 32 and the moisture absorption block 33 are in contact with the inner wall of the face mask 103, the moisture absorption strip 32 and the moisture absorption block 33 wipe the water mist accumulated inside the face mask 103 during the movement. Since the water mist attached to the inside of the face mask 103 can be processed in time, it effectively prevents the water mist from condensing into water droplets after attaching to the inside of the face mask 103, avoiding the water droplets from dropping onto the patient's nose or face when the patient turns over at night or uses the device, and further avoiding the patient from being awakened by suddenly contacting the water droplets, thus ensuring the patient's sleep quality.

[0031] As Figure 6 and Figure 7 shown, an air capacitance buffer includes an air capacitance buffer 4. The air capacitance buffer 4 is arranged at the front end of the ventilator body 1. Vibration damping orifice plates 41 are arranged in parallel at the center inside the air capacitance buffer 4, and the aperture of the vibration damping orifice plates 41 increases from left to right.

[0032] Both sides of the air capacitance buffer 4 are respectively communicated with two air pipes, and the air capacitance buffer 4 is communicated with the face mask 103 through the air pipes.

[0033] By adopting the above technical solution, after the ventilator body 1 sends oxygen or mixed gas into the inside of the air pipe group 102 through the one-way valve 101, one of the air pipes will send the oxygen or mixed gas into the inside of the air capacitance buffer 4. When the oxygen or mixed gas passes through the air capacitance buffer 4 and the vibration damping orifice plates 41 with different apertures inside it, the air flow can be stabilized and the gas pulsation can be reduced. Then it enters the inside of the face mask 103 through the other air pipe. Since the aperture of the vibration damping orifice plates 41 gradually becomes larger from left to right, the air flow will gradually decelerate. Therefore, the friction and collision between the air flow and the edges of the vibration damping orifice plates 41 can be reduced, which not only stabilizes the air flow and reduces the gas pulsation, but also achieves the purpose of reducing noise.

[0034] Working principle: During the process of the exhaled gas being discharged through the exhaust hole 16, the gas will pass through the gas collection module 12, and collect the flow velocity and gas flow rate of the discharged gas within a specified time. The collected data is transmitted to the data control module 15. After the data processing module 13 analyzes the flow velocity and gas flow rate of the gas, the data is transmitted to the calculation module 14, and the calculation module 14 calculates the flow velocity and gas flow rate of the gas. The calculated data is transmitted to the data processing module 13, and the data processing module 13 analyzes the calculated data again. When the calculated data is between the preset value and the peak value, the processing module transmits the data to the control module 15. At this time, the control module 15 will control the delivery frequency of the one-way valve 101 for oxygen and the mixed gas, so that the ratio of the oxygen or mixed gas inhaled by the patient to the exhaled gas always remains at about 1 / 2. If the calculated data is greater than the peak value or less than the preset value, the data processing module 13 transmits the data to the control module 15. At this time, the control module 15 will activate the warning light 17 to give a warning; After the ventilator body 1 sends oxygen or the mixed gas into the inside of the air delivery pipe group 102 through the one-way valve 101, one of the delivery pipes will send oxygen or the mixed gas into the air volume buffer 4. When the oxygen or the mixed gas passes through the air volume buffer 4 and the vibration damping orifice plates 41 with different pore diameters inside it, and then enters the inside of the face mask 103 through another delivery pipe. If the patient has secretions blocking the respiratory tract, take out the plugging cover 241, and then insert the pipe for extracting secretions into the rotating disk 23. As the pipe for extracting secretions passes through the fixed disk 22 and the face mask 103 and is inserted into the patient's respiratory tract, the rotating disk 23 can be twisted. At this time, the rotating disk 23 makes a circular rotation inside the fixed cylinder 21 through the rotating ring on its outer side, so that the four connecting columns 26 drive the clamping pieces 27 to start gathering inward and wrap around the outside of the pipe for extracting secretions. At the same time, when the pipe for extracting secretions passes through the through hole 28, the sealing ring 29 inside the through hole 28 will wrap around the outside of the pipe for extracting secretions, so that a sealed state is formed between the through hole 28 and the outer wall of the pipe for extracting secretions. During the continuous oxygen supply process of the patient, the control module 15 activates the electric push rod 31 every time the calculation module 14 calculates the gas, so that the electric push rod 31 pushes the moisture absorption strip 32 fixedly connected to it. When the moisture absorption strip 32 moves, the moisture absorption block 33 fixed to it will also move and wipe the water mist accumulated inside the face mask 103.

[0035] The above is only a preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A ventilator, comprising a ventilator body (1) and a one-way valve (101) arranged on the front of the ventilator body (1). A gas pipeline group (102) is arranged on the front of the ventilator body (1). One of the pipelines in the gas pipeline group (102) is communicated with the one-way valve (101), and the other pipeline in the gas pipeline group (102) is communicated with a face mask (103) at one end far away from the ventilator body (1). It is characterized in that: An exhaust hole (16) is formed through the upper side of the face mask (103), and a warning light (17) is arranged on the outer side of the ventilator body (1); A gas collection module (12) is jointly arranged inside and outside the exhaust hole (16), and a data processing module (13), a calculation module (14) and a control module (15) are arranged on the outer side of the ventilator body (1); Gas collection module (12): It includes an air velocity meter for collecting the flow velocity and flow rate of the gas discharged from the exhaust hole (16), and a gas flow meter for collecting the gas flow rate of the gas discharged from the exhaust hole (16), and transmits the collected data to the data processing module (13); Data processing module (13): It is used to analyze the gas flow velocity and flow rate collected by the gas collection module (12), transmit the analyzed data to the calculation module (14), receive and analyze the data transmitted by the calculation module (14), and then transmit the data to the control module (15) again; Calculation module (14): It is used to control the gas flow rate transmitted by the one-way valve (101) according to the data transmitted by the data processing module (13), and transmit the calculated data to the data processing module (13); Control module (15): It is used to receive the data that has been calculated by the calculation module (14) and transmitted by the data processing module (13), and control the gas delivery volume and the activation of the warning light (17) according to the data.

2. The ventilator according to claim 1, wherein: The calculation module (14) calculates the speed of the gas discharged from the exhaust hole (16) according to the data transmitted by the gas collection module (12) through the following formula: ×S； Among them, Q is the flow rate when the gas is discharged from the exhaust hole (16), A is the area of the exhaust hole (16), is the pressure difference before and after the exhaust hole (16), is the density of the gas, is the flow coefficient, S is the total duration of gas discharge; The calculation module (14) calculates the gas flow velocity according to the gas discharge flow rate through the following formula: ； ； When V > > ; Among them, V is the gas flow velocity, is the flow velocity of the gas peak value, is the preset flow velocity of the gas. When V > or V < , the control module (15) will turn on the warning light (17). When > V > , the gas delivery volume is reduced so that the tidal volume (the volume of gas inhaled or exhaled each time during quiet breathing) is controlled at about a 1 / 2 inhalation / exhalation ratio.

3. The ventilator according to claim 2, characterized in that: The air delivery pipe group (102) is composed of two delivery pipes. A locking component (2) is arranged on the upper side of the face mask (103). The locking component (2) includes a fixed cylinder (21) fixedly connected to the upper side of the face mask (103). A fixed disk (22) is fixedly connected to the lower side inside the fixed cylinder (21). A rotating disk (23) is rotatably connected to the upper side inside the fixed cylinder (21). Fixed rings (24) are fixedly connected to the outer side of the rotating disk (23) in an annular array. The rotating disk (23) is rotatably connected inside the fixed cylinder (21) through a rotating ring. The shapes of the fixed disk (22) and the rotating disk (23) are both adapted to the inside of the fixed cylinder (21). Arc-shaped grooves (25) are formed through the fixed disk (22) and the rotating disk (23) from top to bottom in an annular array. The arc-shaped grooves (25) corresponding to each other up and down are arranged in a reverse offset manner. Connecting columns (26) are slidably connected to the arc-shaped grooves (25) corresponding to each other up and down. A clamping piece (27) is fixedly connected to the outer side of the connecting column (26). The clamping pieces (27) are hollow cylindrical after being closed.

4. A ventilator according to claim 3, characterized in that: A through hole (28) is commonly formed through the centers of the rotating disk (23) and the fixed disk (22). The through hole (28) is in communication with the interior of the face mask (103). A sealing ring (29) is arranged inside the through hole (28). A plugging cover (241) is clamped in the upper through hole (28) through the sealing ring (29).

5. A ventilator according to claim 1, wherein: A cleaning component (3) is arranged inside the face mask (103). The cleaning component (3) includes electric push rods (31) arranged on the left and right sides of the front and rear parts inside the face mask (103).

6. The ventilator according to claim 5, characterized in that: Moisture absorption strips (32) are fixedly connected to the output ends of the electric push rods (31) corresponding to each other left and right. Moisture absorption blocks (33) are fixedly connected to the left and right sides of the opposite surfaces of the moisture absorption strips (32) corresponding to each other front and rear. The upper sides of the moisture absorption strips (32) and the moisture absorption blocks (33) are in sliding and pressing contact with the inner side wall of the face mask (103).

7. An air capacitance buffer, applicable to a ventilator according to any one of claims 1-6, comprising an air capacitance buffer (4), characterized in that: The air capacitance buffer (4) is arranged at the front end of the ventilator body (1). Vibration damping orifice plates (41) are arranged in parallel at the center inside the air capacitance buffer (4). The aperture of the vibration damping orifice plates (41) increases from left to right.

8. An air capacitance buffer according to claim 7, characterized in that: Both sides of the air capacitance buffer (4) are in communication with two air pipes respectively. The air capacitance buffer (4) is in communication with the face mask (103) through the air pipes.

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