Non-invasive ventilation respirator with stable pressure

Abstract

The invention discloses a non-invasive ventilation respirator with stable pressure, and belongs to the field of medical instruments. The breathing machine comprises a machine body, a breathing pipeline is arranged on the machine body, a mask is connected to the end of the breathing pipeline, an annular air bag is arranged on the edge of the mask, a detection box and an air injection box are connected to the outer wall of the breathing pipeline, the detection box is communicated with the breathing pipeline, an air injection pipe is communicated between the air injection box and the annular air bag, and the detection box is communicated with a limiting pipe. A piston plate is slidably connected into the limiting pipe, a rectangular rod is fixedly connected to the piston plate, a wedge block is connected to the rectangular rod, a valve is arranged on the air injection pipe, when the air pressure in the breathing pipeline is reduced, the length of the portion, sliding out of the limiting pipe, of the rectangular rod is reduced, and the high position of the wedge block can touch the valve so that the valve can be opened; the breathing machine can automatically detect whether the air pressure is low or not and timely improve the contact state of the mask and the face of a patient.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a non-invasive ventilation ventilator with stable pressure. Background Art

[0002] In the modern medical field, non-invasive ventilation ventilators are widely used in the treatment of respiratory failure, sleep apnea syndrome and other diseases due to their advantage of not requiring tracheal intubation or incision, providing patients with comfortable and effective respiratory support.

[0003] However, existing non-invasive ventilation ventilators generally face the problem of insufficient pressure stability during actual use. Since the fit between the mask and the patient's face is affected by factors such as changes in the patient's body position and differences in facial contours, air leakage is very likely to occur, resulting in fluctuations in air pressure in the breathing duct, which not only reduces the treatment effect, but may also cause discomfort to the patient and even delay the disease. In addition, traditional equipment lacks real-time monitoring and adaptive adjustment mechanisms, and is unable to take timely measures to improve the sealing of the mask according to changes in air pressure, further aggravating the unstable pressure situation. Therefore, the development of a non-invasive ventilation ventilator that can monitor air pressure changes in real time and automatically adjust the sealing of the mask to maintain stable pressure has become a key issue that needs to be urgently addressed to improve the effectiveness of non-invasive ventilation treatment. Summary of the Invention

[0004] The purpose of the present invention is to provide a non-invasive ventilation ventilator with stable pressure, which solves the problem of unstable air pressure caused by air leakage at the mask.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a pressure-stable non-invasive ventilation ventilator, comprising a body, a breathing duct provided on the body, a mask connected to the end of the breathing duct, an annular airbag provided on the edge of the mask, a detection box and an air injection box connected to the outer wall of the breathing duct, the detection box is connected to the breathing duct, an air injection pipe is connected between the air injection box and the annular airbag, a limiting pipe is connected to the detection box, a piston plate is slidably connected to the limiting pipe, a rectangular rod is fixedly connected to the piston plate, a wedge is connected to the rectangular rod, a valve is provided on the air injection pipe, when the air pressure in the breathing duct decreases, the length of the rectangular rod sliding out of the limiting pipe is reduced, and the high point of the wedge can touch the valve to open the valve.

[0006] Preferably, the valve includes a rectangular tube connected to the gas injection pipe, a rectangular block is slidably connected in the rectangular tube, and a through hole is opened on the rectangular block. When the rectangular block slides in the rectangular tube, the through hole can be connected to the gas injection pipe to open the valve.

[0007] Preferably, a bracket is fixedly connected to the breathing duct, the rectangular tube is linearly slidably connected to the bracket, an N-shaped frame is fixedly connected to the upper part of the rectangular tube, a first spring is connected between the N-shaped frame and the rectangular block, a passive cylinder is fixedly connected to the top of the bracket, the output end of the passive cylinder is fixedly connected to the N-shaped frame, and when gas flows in the breathing duct, the passive cylinder extends to make the rectangular block close to the wedge block.

[0008] Preferably, it further comprises a piston pump mechanism and a motor for driving the piston pump mechanism, wherein the output end of the motor is connected to a drive shaft, the end of the drive shaft is connected to a disc, and a protrusion is provided on the side wall of the disc;

[0009] An active cylinder is fixedly connected to the body, and a transmission pipe is connected between the active cylinder and the passive cylinder. When the disc rotates so that the piston pump mechanism injects air, the protrusion can push the active cylinder to shorten.

[0010] Preferably, a second spring is provided in the limiting tube, and two ends of the second spring are respectively connected to the piston plate and the limiting tube.

[0011] Preferably, the piston pump mechanism includes a piston cylinder connected to the breathing duct, the piston cylinder is also connected to an air intake pipe, the air intake pipe is connected to the oxygen supply of the body, and a one-way valve is provided on the air intake pipe and the breathing duct, a piston rod is slidably connected in the piston cylinder, the end of the piston rod is fixedly connected to a rectangular frame, a sliding rod is provided on the disc, the sliding rod slides in the rectangular frame, and when the disc rotates, the sliding rod slides back and forth in the rectangular frame, so that the piston rod slides back and forth in the piston cylinder.

[0012] Preferably, a slide is slidably connected to the air injection box, the side wall of the slide is in contact with the inner wall of the air injection box, and a third spring is connected between the slide and the air injection box. When the valve is opened, the third spring elastically releases and pushes the slide to slide in the air injection box.

[0013] Preferably, the air injection box is connected to an air supply pipe, and a one-way valve is provided on the air supply pipe.

[0014] Preferably, a push rod is slidably connected through the middle of the drive shaft, an inclined rod is hinged at the end of the push rod, a slide is hinged at the end of the inclined rod, the slide is radially and linearly connected to the disc, the slide is fixedly connected to the slide, and when the push rod slides axially in the drive shaft, it can be transmitted to the slide through the inclined rod, so that the distance between the slide and the center of the disc changes, thereby changing the sliding stroke of the piston rod.

[0015] Preferably, a sliding switch and a pneumatic telescopic rod are fixedly connected to the outer wall of the gas injection box, the output end of the pneumatic telescopic rod is fixedly connected to the slide of the sliding switch, an air supply pipe is connected between the pneumatic telescopic rod and the gas injection box, and a solenoid valve is provided on the air supply pipe;

[0016] An electric telescopic rod is fixedly connected to the body, and the output end of the electric telescopic rod is rotatably connected to the push rod. After the annular airbag is fully inflated, the slide continues to slide to transmit gas through the gas pipe to the pneumatic telescopic rod, so that the pneumatic telescopic rod extends to drive the slide to slide on the sliding switch, causing the electric telescopic rod to extend and the motor speed to increase.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] In the present invention, when gas flows in the breathing duct, the air pressure in the breathing duct increases, and the air pressure is transmitted to the detection box connected thereto, so that the piston plate can slide in the limiting tube. If the breathing mask fits the patient's face well, the amount of gas leaking from the mask is small. At this time, the air pressure in the breathing duct is relatively high, so the piston plate can slide a longer distance in the limiting tube. At this time, the rectangular rod can slide a longer distance, so that the wedge moves past the lower part of the valve. Therefore, when the valve moves downward, it will not contact the wedge, and the valve will not open. On the contrary, when an air leak occurs at the mask, the breathing tube will quickly release pressure. At this time, the sliding distance of the piston plate is shorter or no sliding occurs, so that the high point of the wedge block will be at the bottom of the valve, so that when the valve moves down, it can contact the wedge block, causing the valve to open, so that the air injection box is connected to the annular airbag, and the air in the air injection box enters the annular airbag, causing the annular airbag to further expand, so that the gap between the mask and the patient's face is filled, ensuring the airtightness of the mask, thereby making the gas pressure supplied to the patient's breathing stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the motor of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the disc of the present invention;

[0022] Figure 4 For the present invention Figure 3 Schematic diagram of the structure of part A;

[0023] Figure 5 It is a structural schematic diagram of the push rod of the present invention;

[0024] Figure 6 It is a structural schematic diagram of the sliding switch of the present invention.

[0025] In the figure: 100, body; 110, breathing tube; 120, mask; 130, elastic band; 200, motor; 210, drive shaft; 220, disc; 230, slide rod; 240, rectangular frame; 250, piston rod; 260, piston cylinder; 270, air inlet pipe; 300, detection box; 310, limit tube; 320, piston plate; 330, rectangular rod; 331, second spring; 340, wedge; 350, air injection pipe; 351, annular air bag; 360, support Frame; 370, rectangular tube; 371, rectangular block; 372, through hole; 373, first spring; 380, passive cylinder; 381, N-shaped frame; 390, active cylinder; 391, protrusion; 392, transmission pipe; 400, air injection box; 410, slide plate; 420, third spring; 430, air supply pipe; 440, sliding switch; 450, pneumatic telescopic rod; 451, air supply pipe; 460, electric telescopic rod; 470, push rod; 480, diagonal rod; 490, slide seat. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Reference Figures 1-6 , this embodiment provides a technical solution: a pressure-stable non-invasive ventilation ventilator, including a body 100, a breathing tube 110 is provided on the body 100, the end of the breathing tube 110 is connected to the mask 120, the edge of the mask 120 is provided with an annular airbag 351, the outer wall of the breathing tube 110 is connected to the detection box 300 and the air injection box 400, the detection box 300 is connected to the breathing tube 110, the air injection tube 350 is connected between the air injection box 400 and the annular airbag 351, the detection box 300 is connected to the limit tube 310, the limit tube 310 is slidably connected with a piston plate 320, the piston plate 320 is fixedly connected to the rectangular rod 330, the rectangular rod 330 is connected to the wedge 340, and the air injection tube 350 is provided with a valve. When the air pressure in the breathing tube 110 decreases, the length of the rectangular rod 330 sliding out of the limit tube 310 is reduced, and the high point of the wedge 340 can touch the valve to open the valve.

[0028] The mask 120 is connected to an elastic band 130. When in use, the mask 120 is covered over the patient's mouth and nose, the elastic band 130 is put on the patient's head, and the ventilator is started. At this time, the ventilator delivers oxygen or a mixture of oxygen and air to the mask 120 through the breathing tube 110. When the gas flows in the breathing tube 110, the air pressure in the breathing tube 110 increases, and the air pressure is transmitted to the detection box 300 connected thereto, so that the piston plate 320 can slide in the limiting tube 310. If the breathing mask 120 fits the patient's face well, the amount of gas leaking from the mask 120 is small. At this time, the air pressure in the breathing tube 110 is large, so that the piston plate 320 can slide a longer distance in the limiting tube 310, and the rectangular rod 330 can slide a farther distance, so that When the air in the air box 400 is in contact with the annular airbag 351, the air in the air box 400 enters the annular airbag 351, causing the annular airbag 351 to further expand, thereby filling the gap between the contact area between the mask 120 and the patient's face, thereby ensuring the airtightness of the mask 120 and the air pressure of the patient.

[0029] The height of the wedge 340 gradually increases from the piston plate 320 to the rectangular rod 330. The shorter the sliding distance of the rectangular rod 330, the higher the wedge 340 is at the lower part of the valve, making the valve opening larger. Otherwise, the valve opening is smaller.

[0030] The preset pressure of air in the gas injection box 400 is greater than the pressure in the annular airbag 351 , ensuring that the gas can smoothly flow into the annular airbag 351 when the valve is opened, causing the annular airbag 351 to expand.

[0031] The valve includes a rectangular tube 370 connected to the gas injection pipe 350, and a rectangular block 371 is slidably connected inside the rectangular tube 370. The rectangular block 371 is provided with a through hole 372. When the rectangular block 371 slides in the rectangular tube 370, the through hole 372 can be connected to the gas injection pipe 350 to open the valve.

[0032] The rectangular tube 370 can move and approach or move away from the wedge block 340. After the gas flows in the breathing tube 110 and before the gas stops flowing, the rectangular tube 370 can approach the wedge block 340. The timing of the movement of the rectangular tube 370 is set so that the rectangular rod 330 slides relatively behind the limiting tube 310 and remains stable, so that the rectangular block 371 can contact the wedge block 340, thereby preventing the rectangular rod 330 from contacting the rectangular block 371 during the movement, causing the annular airbag 351 to over-expand when it does not need to expand, and when the rectangular tube 370 moves downward to the lowest point, the rectangular block 371 just contacts the rectangular rod 330. At this time, the rectangular rod 330 will not push the rectangular block 371, so that the valve will not open at this time.

[0033] A bracket 360 is fixedly connected to the breathing duct 110, and a rectangular tube 370 is linearly slidably connected to the bracket 360. An N-shaped frame 381 is fixedly connected to the upper part of the rectangular tube 370, and a first spring 373 is connected between the N-shaped frame 381 and the rectangular block 371. A passive cylinder 380 is fixedly connected to the top of the bracket 360, and the output end of the passive cylinder 380 is fixedly connected to the N-shaped frame 381. When gas flows in the breathing duct 110, the passive cylinder 380 extends to make the rectangular block 371 close to the wedge block 340.

[0034] When the passive cylinder 380 is extended, it can drive the rectangular cylinder 370 to move downward through the N-shaped frame 381. At this time, the rectangular cylinder 370 drives the rectangular block 371 to move downward synchronously through the first spring 373. When moving downward, if the rectangular block 371 contacts the wedge block 340, the wedge block 340 pushes the rectangular block 371 to move upward, so that the first spring 373 is compressed. At this time, the through hole 372 is connected to the air injection pipe 350, so that the valve is opened. When the passive cylinder 380 is subsequently shortened, the elastic force applied to the rectangular block 371 by the first spring 373 causes the rectangular block 371 to reset. At this time, the through hole 372 is not connected to the air injection pipe 350, so that the valve is closed; and when the passive cylinder 380 is extended so that the rectangular block 371 only contacts the rectangular rod 330, the rectangular block 371 will not move upward relative to the rectangular cylinder 370. At this time, the through hole 372 is not connected to the air injection pipe 350.

[0035] It also includes a piston pump mechanism and a motor 200 for driving the piston pump mechanism. The output end of the motor 200 is connected to a drive shaft 210, the end of the drive shaft 210 is connected to a disc 220, and a protrusion 391 is provided on the side wall of the disc 220; an active cylinder 390 is fixedly connected to the body 100, and a transmission pipe 392 is connected between the active cylinder 390 and the passive cylinder 380. When the disc 220 rotates to allow the piston pump mechanism to be injected with air, the protrusion 391 can push the active cylinder 390 to shorten.

[0036] When the motor 200 is started, it can drive the piston pump mechanism to operate, providing power for the gas to flow in the breathing duct 110. At the same time, the motor 200 drives the disc 220 to rotate through the drive shaft 210. At this time, the protrusion 391 on the side wall of the disc 220 can abut against the active cylinder 390, so that the active cylinder 390 is shortened, allowing the gas to be transmitted to the passive cylinder 380, and then the passive cylinder 380 drives the rectangular cylinder 370 to move downward.

[0037] A second spring 331 is provided in the limiting tube 310 , and two ends of the second spring 331 are connected to the piston plate 320 and the limiting tube 310 respectively.

[0038] The second spring 331 is provided so that when the air pressure in the breathing tube 110 is reduced, the piston plate 320 can be pushed, so that the rectangular rod 330 slides back to its original position, so that subsequent air pressure detection is not affected.

[0039] The piston pump mechanism includes a piston cylinder 260 connected to the breathing pipe 110, and the piston cylinder 260 is also connected to the air intake pipe 270, which is connected to the oxygen supply of the body 100, and both the air intake pipe 270 and the breathing pipe 110 are provided with a one-way valve. A piston rod 250 is slidably connected in the piston cylinder 260, and the end of the piston rod 250 is fixedly connected to the rectangular frame 240. A sliding rod 230 is provided on the disc 220, and the sliding rod 230 slides in the rectangular frame 240. When the disc 220 rotates, the sliding rod 230 slides back and forth in the rectangular frame 240, so that the piston rod 250 slides back and forth in the piston cylinder 260.

[0040] The piston cylinder 260 is fixedly connected to the body 100. When the disc 220 rotates, it can drive the slide rod 230 to revolve. When the slide rod 230 revolves, it can slide in the rectangular frame 240 and drive the piston rod 250 to slide back and forth in the piston cylinder 260 through the rectangular frame 240. At this time, the piston cylinder 260 can extract oxygen or a mixture of oxygen and air through the intake pipe 270, and then discharge the gas through the breathing pipe 110 for the patient to breathe. The body 100 is provided with an oxygen generating mechanism and a mixing mechanism for mixing oxygen and air. The oxygen generating mechanism and the mixing mechanism adopt the same configuration as the existing technology.

[0041] When the disc 220 rotates and drives the piston rod 250 to slide to the middle position in the piston tube 260, the protrusion 391 on the side wall of the disc 220 can contact the active cylinder 390 and drive the active cylinder 390 to contract. At this time, sufficient gas flow pressure has been generated in the breathing tube 110. Therefore, when the active cylinder 390 resumes transmission, it can accurately determine whether the mask 120 is leaking and can inflate the annular airbag 351 to address the leak.

[0042] After the protrusion 391 passes the position of the active cylinder 390, the active cylinder 390 is no longer subjected to compression force. At this time, the first spring 373 elastically relaxes, driving the N-shaped frame 381 to move upward relative to the rectangular block 371. In addition, a tension spring is connected between the cylinder body and the cylinder rod of the passive cylinder 380. After the active cylinder 390 is no longer subjected to compression, the tension spring drives the passive cylinder 380 to shorten, thereby resetting the rectangular cylinder 370.

[0043] A slide plate 410 is slidably connected inside the gas injection box 400, and the side wall of the slide plate 410 is in contact with the inner wall of the gas injection box 400. A third spring 420 is connected between the slide plate 410 and the gas injection box 400. When the valve is opened, the third spring 420 is elastically released and pushes the slide plate 410 to slide in the gas injection box 400.

[0044] The third spring 420 provides thrust for the sliding of the slide plate 410. When the valve is opened, the elastic force of the third spring 420 is released, causing the slide plate 410 to slide in the air injection box 400, so that the air in the air injection box 400 is conducted to the annular airbag 351 through the air injection pipe 350.

[0045] The gas injection box 400 is connected to an air supply pipe 430 , and a one-way valve is provided on the air supply pipe 430 .

[0046] An air release valve can be provided on the annular airbag 351 as required. The breathing tube 110 is plugged into the mask 120, and the air injection tube 350 is plugged into the annular airbag 351, which facilitates the subsequent replacement of the mask 120. An exhaust hole can also be provided on the mask 120 as required.

[0047] After the annular airbag 351 is fully inflated, the air injection box 400 can be replenished with air through the air supply pipe 430 as needed or before subsequent use. The setting of the one-way valve on the air supply pipe 430 prevents the air in the air injection box 400 from leaking at the air supply pipe 430.

[0048] A push rod 470 is slidably connected through the middle of the drive shaft 210, and an inclined rod 480 is hinged at the end of the push rod 470. A slide 490 is hinged at the end of the inclined rod 480. The slide 490 is radially and linearly slidably connected to the disc 220, and the slide 230 is fixedly connected to the slide 490. When the push rod 470 slides axially in the drive shaft 210, it can be transmitted to the slide 490 through the inclined rod 480, so that the distance between the slide 490 and the center of the disc 220 changes, thereby changing the sliding stroke of the piston rod 250.

[0049] After the annular airbag 351 is fully inflated, if the air pressure in the breathing tube 110 is still low, the push rod 470 slides toward the disk 220, and the push rod 470 pushes the inclined rod 480 to swing. The inclined rod 480 pushes the slide 490 to slide on the disk 220, so that the distance between the slide rod 230 and the center of the disk 220 increases, so that when the disk 220 rotates, it can drive the sliding stroke of the piston rod 250 to increase, thereby increasing the gas output of the breathing tube 110.

[0050] The outer wall of the gas injection box 400 is fixedly connected with a sliding switch 440 and a pneumatic telescopic rod 450, and the output end of the pneumatic telescopic rod 450 is fixedly connected to the slide of the sliding switch 440. An air supply pipe 451 is connected between the pneumatic telescopic rod 450 and the gas injection box 400, and an electromagnetic valve is provided on the air supply pipe 451; an electric telescopic rod 460 is fixedly connected to the body 100, and the output end of the electric telescopic rod 460 is rotatably connected to the push rod 470. After the annular airbag 351 is fully inflated, the slide 410 continues to slide to transmit gas to the pneumatic telescopic rod 450 through the air supply pipe 451, so that the pneumatic telescopic rod 450 extends to drive the slide to slide on the sliding switch 440, so that the electric telescopic rod 460 extends and the speed of the motor 200 increases.

[0051] A position sensor is provided in the gas injection box 400. When the slide plate 410 slides to the position sensor, the air output by the gas injection box 400 to the annular airbag 351 can fully inflate the annular airbag 351. When the position sensor detects that the slide plate 410 has moved to its position, the control system controls the solenoid valve on the gas supply pipe 451 to open. At this time, the gas in the gas injection box 400 is transmitted to the pneumatic telescopic rod 450 through the gas supply pipe 451, so that the pneumatic telescopic rod 450 extends, and the pneumatic telescopic rod 450 drives the slide of the sliding switch 440 to slide, so that the electric telescopic rod 460 extends, and at the same time increases the speed of the motor 200, thereby causing the piston pump mechanism to drive the gas pressure and flow rate to flow in the breathing pipe 110 to increase, so that the breathing pressure can be increased to the required level;

[0052] If the pressure is still unstable after all the above actions are completed, the airtightness of the breathing mask 120 may not be the factor affecting the reduction of breathing pressure. At this time, it is necessary to check whether there is any fault in other parts of the equipment.

[0053] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A pressure-stable non-invasive ventilation ventilator, comprising a body (100), wherein a breathing tube (110) is provided on the body (100), and characterized in that: The end of the breathing duct (110) is connected to a mask (120), and an annular airbag (351) is provided on the edge of the mask (120). The outer wall of the breathing duct (110) is connected to a detection box (300) and an air injection box (400). The detection box (300) is in communication with the breathing duct (110), and an air injection pipe (350) is in communication between the air injection box (400) and the annular airbag (351). The detection box (300) is in communication with a limit pipe (310). A piston plate (320) is slidably connected to the limiting tube (310), a rectangular rod (330) is fixedly connected to the piston plate (320), a wedge block (340) is connected to the rectangular rod (330), and a valve is provided on the air injection tube (350). When the air pressure in the breathing duct (110) decreases, the length of the rectangular rod (330) sliding out of the limiting tube (310) is reduced, and the height of the wedge block (340) can touch the valve to open the valve.

2. The pressure-stabilized non-invasive ventilation ventilator according to claim 1, characterized in that: The valve comprises a rectangular tube (370) connected to the gas injection pipe (350), a rectangular block (371) is slidably connected in the rectangular tube (370), and a through hole (372) is provided on the rectangular block (371). When the rectangular block (371) slides in the rectangular tube (370), the through hole (372) can be connected to the gas injection pipe (350) to open the valve.

3. The pressure-stabilized non-invasive ventilation ventilator according to claim 2, characterized in that: The breathing duct (110) is fixedly connected to a bracket (360), the rectangular tube (370) is linearly slidably connected to the bracket (360), the upper part of the rectangular tube (370) is fixedly connected to an N-shaped frame (381), a first spring (373) is connected between the N-shaped frame (381) and the rectangular block (371), the top of the bracket (360) is fixedly connected to a passive cylinder (380), the output end of the passive cylinder (380) is fixedly connected to the N-shaped frame (381), and when gas flows in the breathing duct (110), the passive cylinder (380) extends to make the rectangular block (371) close to the wedge block (340).

4. The pressure-stabilized non-invasive ventilation ventilator according to claim 3, characterized in that: It also includes a piston pump mechanism and a motor (200) for driving the piston pump mechanism, wherein the output end of the motor (200) is connected to a drive shaft (210), the end of the drive shaft (210) is connected to a disc (220), and a protrusion (391) is provided on the side wall of the disc (220); An active cylinder (390) is fixedly connected to the machine body (100), and a transmission pipe (392) is connected between the active cylinder (390) and the passive cylinder (380). When the disc (220) rotates so that the piston pump mechanism is injected with air, the protrusion (391) can push the active cylinder (390) to shorten.

5. The pressure-stabilized non-invasive ventilation ventilator according to claim 4, characterized in that: A second spring (331) is provided in the position-limiting tube (310), and two ends of the second spring (331) are respectively connected to the piston plate (320) and the position-limiting tube (310).

6. The pressure-stabilized non-invasive ventilation ventilator according to claim 5, characterized in that: The piston pump mechanism includes a piston cylinder (260) connected to the breathing pipe (110), and the piston cylinder (260) is also connected to an air intake pipe (270). The air intake pipe (270) is connected to the oxygen supply of the body (100), and a one-way valve is provided on the air intake pipe (270) and the breathing pipe (110). A piston rod (250) is slidably connected in the piston cylinder (260), and the end of the piston rod (250) is fixedly connected to a rectangular frame (240). A sliding rod (230) is provided on the disc (220), and the sliding rod (230) slides in the rectangular frame (240). When the disc (220) rotates, the sliding rod (230) slides back and forth in the rectangular frame (240), so that the piston rod (250) slides back and forth in the piston cylinder (260).

7. The pressure-stabilized non-invasive ventilation ventilator according to claim 6, characterized in that: A slide plate (410) is slidably connected inside the gas injection box (400), and the side wall of the slide plate (410) is in contact with the inner wall of the gas injection box (400). A third spring (420) is connected between the slide plate (410) and the gas injection box (400). When the valve is opened, the third spring (420) is elastically released and pushes the slide plate (410) to slide on the gas injection box (400).

8. The pressure-stabilized non-invasive ventilation ventilator according to claim 7, characterized in that: The air injection box (400) is connected to an air supply pipe (430), and a one-way valve is provided on the air supply pipe (430).

9. The pressure-stabilized non-invasive ventilation ventilator according to claim 8, characterized in that: A push rod (470) is slidably connected through the middle of the drive shaft (210), an end of the push rod (470) is hinged with an inclined rod (480), and an end of the inclined rod (480) is hinged with a slide seat (490), the slide seat (490) is radially and linearly slidably connected to the disc (220), and the slide rod (230) is fixedly connected to the slide seat (490). When the push rod (470) slides axially in the drive shaft (210), it can be transmitted to the slide seat (490) through the inclined rod (480), so that the distance between the slide seat (490) and the center of the disc (220) changes, thereby changing the sliding stroke of the piston rod (250).

10. The pressure-stabilized non-invasive ventilation ventilator according to claim 9, characterized in that: The outer wall of the gas injection box (400) is fixedly connected to a sliding switch (440) and a pneumatic telescopic rod (450), the output end of the pneumatic telescopic rod (450) is fixedly connected to the slide of the sliding switch (440), and an air supply pipe (451) is connected between the pneumatic telescopic rod (450) and the gas injection box (400), and a solenoid valve is provided on the air supply pipe (451); An electric telescopic rod (460) is fixedly connected to the body (100), and an output end of the electric telescopic rod (460) is rotatably connected to the push rod (470). After the annular airbag (351) is fully expanded, the slide plate (410) continues to slide to transmit gas to the pneumatic telescopic rod (450) through the gas pipe (451), so that the pneumatic telescopic rod (450) extends to drive the slide plate to slide on the sliding switch (440), so that the electric telescopic rod (460) extends and the speed of the motor (200) increases.

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