Portable breathing machine convenient for teaching

Abstract

The invention relates to the technical field of medical instruments, and particularly discloses a portable breathing machine convenient for teaching, which comprises a breathing machine body, a pipeline assembly and a respirator assembly, one end of the pipeline assembly is connected with the breathing machine body, the pipeline assembly is connected with the respirator assembly, and the pipeline assembly comprises a breathing tube, a first branch tube and a second branch tube; one end of the first branch pipe and one end of the second branch pipe are connected with the breathing pipe, airflow in the breathing pipe flows towards the first branch pipe and the second branch pipe, the airflow in the first branch pipe is used for simulating the breathing frequency of the human body, and the airflow in the second branch pipe controls the air output in the respirator assembly; the device prompts operation students to pay attention to abnormal phenomena in time and guides the operation students to carry out corresponding adjustment and operation through an alarm function of a lighting lamp and a buzzer, so that the interactivity and the practicability of teaching are enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a portable ventilator convenient for teaching. Background Technique

[0002] In the teaching of internal medicine nursing and health assessment, the application of ventilators is an important teaching content. Traditionally, ventilator teaching mostly relies on large and bulky home or medical ventilators. These devices are not only huge in volume and inconvenient to carry, but also often make it difficult for students to intuitively and comprehensively understand the structure, working principle, and operation process of the ventilator. With the continuous development of medical technology and the increasing requirements of patients for the quality of life, portable ventilators have gradually emerged. Portable ventilators, with their small size, light weight, and easy-to-carry characteristics, have been widely used in multiple scenarios such as traveling and home care.

[0003] A portable ventilator generally consists of components such as a main unit, a gas source, a humidifier, an external pipeline, and a face mask. The main unit is the core part of the ventilator, responsible for controlling the delivery of gas and the adjustment of pressure. The gas source provides the gas required for the patient's breathing, which can be electric air supply or compressed gas source. The humidifier is used to humidify and heat the inhaled gas to improve the comfort of the patient. The external pipeline connects the main unit and the face mask to transfer gas. The face mask covers the patient's mouth and nose to ensure that the gas can smoothly enter the lungs.

[0004] Currently, during the teaching demonstration process, if the air flow output of the portable ventilator fluctuates or is unstable, students are very likely to have doubts about the treatment effect of the ventilator. Such doubts will not only affect their confidence and acceptance of this medical device, but may also affect their correct use and judgment of the ventilator in future clinical practice. Students often cannot observe and detect the changes in air flow in a timely manner. If the air flow of the ventilator is unstable, the patient may face treatment risks due to the inability to adjust in time. For this reason, we propose a portable ventilator convenient for teaching. Summary of the Invention

[0005] The purpose of the present invention is to provide a portable ventilator convenient for teaching, so as to solve the problems raised in the above background technique. Currently, during the teaching demonstration process, if the air flow output of the portable ventilator fluctuates or is unstable, students are very likely to have doubts about the treatment effect of the ventilator. Such doubts will not only affect their confidence and acceptance of this medical device, but may also affect their correct use and judgment of the ventilator in future clinical practice. Students often cannot observe and detect the changes in air flow in a timely manner. If the air flow of the ventilator is unstable, the patient may face treatment risks due to the inability to adjust in time.

[0006] To achieve the above object, the present invention provides the following technical solution: A portable ventilator for facilitating teaching, including a ventilator body, further including: a pipeline assembly and a breathing mask assembly. One end of the pipeline assembly is connected to the ventilator body, and the pipeline assembly is connected to the breathing mask assembly. The pipeline assembly respectively includes a breathing tube, a first branch tube, and a second branch tube. One ends of the first branch tube and the second branch tube are respectively connected to the breathing tube. The air flow in the breathing tube flows to the first branch tube and the second branch tube. The air flow in the first branch tube is used to simulate the human breathing frequency, and the air flow in the second branch tube controls the amount of air output in the breathing mask assembly.

[0007] Among them, a first fixing tube is connected to the top of the breathing tube. One end of the first fixing tube is provided with a fixing seat. On one side inside the fixing seat, two symmetrically arranged first support plates are installed. Inside the two first support plates, a first metal rod and a first wiring column are respectively jointly arranged. A first resistance wire is arranged outside the first wiring column. A first sliding piece is arranged outside the first metal rod. A connecting frame is installed on one side of the first sliding piece. A hollow rod is installed on one side of the connecting frame. One end of the hollow rod is provided with a first connecting plate. A humidity sensor probe is installed on one side of the first connecting plate.

[0008] Among them, one end of the first branch tube is provided with an installation seat. A first connecting tube and a second connecting tube are respectively arranged at the top and bottom of the installation seat. On one side inside the installation seat, an adjusting seat is installed. On both sides inside the adjusting seat, a first electromagnet and a second electromagnet are respectively installed. An iron block is slidably connected inside the adjusting seat. One end of the iron block is provided with a connecting rod. A first blocking plate and a second blocking plate are respectively installed at the top and bottom of the connecting rod.

[0009] Among them, the outer wall of the first blocking plate fits with the inner wall of the first connecting tube, and the outer wall of the second blocking plate fits with the inner wall of the second connecting tube. First air outlet pipes and second air outlet pipes with control valves are respectively arranged on the outer circumferences of the first connecting tube and the second connecting tube. A third air outlet pipe with a control valve is arranged on the outer circumference of the second branch tube. A buzzer one is installed on one side outside the fixing seat. A first light and a second light are respectively arranged on the other side outside the fixing seat.

[0010] Among them, the breathing mask assembly includes a breathing mask body. A connecting belt is arranged outside the breathing mask body. A ventilation pipe is installed on one side of the breathing mask body. A third connecting tube is installed at the bottom of the ventilation pipe. An installation box is installed at one end of the ventilation pipe. A buzzer two is installed on one side outside the installation box. A third light and a fourth light are respectively arranged on the other side outside the installation box.

[0011] Among them, on one side inside the installation box, two symmetrically arranged second brackets are installed. Inside the two second brackets, a second metal rod and a second wiring column are respectively jointly installed. A second resistance wire is arranged outside the second wiring column. A second sliding piece is connected outside the second metal rod.

[0012] Among them, one end of the second sliding piece is installed with a mounting frame. On the outer sides of both sides of the mounting frame, a first pressure rod and a second pressure rod are respectively installed. On one side of the two second brackets, a first pressure sensor and a second pressure sensor are respectively installed. The first pressure sensor corresponds to the first pressure rod, and the second pressure sensor corresponds to the second pressure rod.

[0013] Among them, a connecting column is installed on the outer side of one side of the mounting frame. One end of the connecting column is installed with an adjusting plate. The adjusting plate is located inside the ventilation pipe. A pressure airbag is arranged inside the third connecting pipe.

[0014] Among them, a first fixing frame and a second fixing frame are respectively installed at the top end and the bottom end inside the breathing mask body. A red airbag is installed on one side of the first fixing frame.

[0015] Among them, a blue airbag is installed on one side of the second fixing frame. A third pressure sensor is arranged inside the first fixing frame, and a fourth pressure sensor is arranged inside the second fixing frame.

[0016] The present invention at least has the following beneficial effects: The humidity sensor probe is used to monitor the humidity of the air flow in real time. When the humidity is abnormal, the buzzer can be triggered to alarm in time, and the excessive or too low humidity can be indicated by lighting, so that the operating trainees can quickly understand and adjust the air flow humidity to ensure the normal operation of the ventilator; The pressure changes inside the breathing mask are monitored in real time by multiple pressure sensors. When the pressure is abnormal, the buzzer can also be triggered to alarm, and the excessive or too low pressure can be indicated by lighting, which helps the operating trainees understand the usage status of the breathing mask and ensure the accuracy of the simulated breathing; The device simulates the breathing frequency of the human body through the first branch pipe. By controlling the energization or de - energization of the electromagnet, the alternate inflation and deflation of the red airbag and the blue airbag are realized, so as to simulate the breathing process of the human body. This function enables the teaching demonstration device to more intuitively display the usage effect of the ventilator; The breathing mask body is made of transparent material, which is convenient for the operator to observe the inflation and deflation processes of the red airbag and the blue airbag, improving the teaching quality; Through the alarm functions of lighting and buzzer, the operating trainees are timely reminded to pay attention to abnormal phenomena and guided to make corresponding adjustments and operations, enhancing the interactivity and practicality of teaching. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 is a rear view of the structure of the present invention;

[0019] Figure 3 is a semi - exploded view of the structure of the present invention;

[0020] Figure 4 is a schematic diagram of the pipeline assembly of the present invention;

[0021] Figure 5 is a side view of the pipeline assembly of the present invention;

[0022] Figure 6 Internal view of the pipeline component of the present invention;

[0023] Figure 7 For the present invention Figure 6 Enlarged view of A in the figure;

[0024] Figure 8 For the present invention Figure 6 Enlarged view of B in the figure;

[0025] Figure 9 Schematic diagram of the breathing mask assembly of the present invention;

[0026] Figure 10 Front view of the breathing mask assembly of the present invention;

[0027] Figure 11 Internal view of the breathing mask assembly of the present invention;

[0028] Figure 12 For the present invention Figure 11 Semi-explosion view of C in the figure.

[0029] In the figure: 1, ventilator body; 2, pipeline component; 3, breathing mask component; 21, breathing tube; 22, first fixed tube; 23, first branch tube; 24, second branch tube; 25, fixed seat; 26, first support plate; 27, first metal rod; 28, first terminal; 29, first resistance wire; 210, first sliding piece; 211, connecting frame; 212, hollow rod; 213, first connecting plate; 214, humidity sensor probe; 215, mounting seat; 216, first connecting tube; 217, second connecting tube; 218, adjusting seat; 219, first electromagnet; 220, second electromagnet; 221, iron block; 222, connecting rod; 223, first baffle; 224, second baffle; 225, first air outlet pipe; 226, second air outlet pipe; 227, third air outlet pipe; 228, buzzer 1; 229, light 1; 230, light 2; 31, breathing mask body; 32, connecting belt; 33, ventilation pipe; 34, third connecting tube; 35, installation box; 36, buzzer 2; 37, light 3; 38, light 4; 39, second bracket; 310, second metal rod; 311, second terminal; 312, second resistance wire; 313, second sliding piece; 314, mounting rack; 315, pressing rod 1; 316, pressing rod 2; 317, pressure sensor 1; 318, pressure sensor 2; 319, connecting column; 320, adjusting plate; 321, pressure airbag ball; 322, fixing frame 1; 323, fixing frame 2; 324, red airbag; 325, blue airbag; 326, pressure sensor 3; 327, pressure sensor 4. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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.

[0031] Embodiment 1

[0032] Please refer to Figures 1 to 12 , the present invention provides a technical solution: a portable ventilator for facilitating teaching, including a ventilator body 1, and further including: a pipeline assembly 2 and a breathing mask assembly 3. One end of the pipeline assembly 2 is connected to the ventilator body 1, and the pipeline assembly 2 is connected to the breathing mask assembly 3. The pipeline assembly 2 respectively includes a breathing tube 21, a first branch tube 23 and a second branch tube 24. One ends of the first branch tube 23 and the second branch tube 24 are respectively connected to the breathing tube 21. The airflow in the breathing tube 21 flows to the first branch tube 23 and the second branch tube 24. The airflow in the first branch tube 23 is used to simulate the human breathing frequency, and the airflow in the second branch tube 24 controls the size of the air output in the breathing mask assembly 3;

[0033] This portable ventilator teaching demonstration device is connected to the ventilator body 1 through the pipeline assembly 2 and the breathing mask assembly 3, simulates the human breathing process, and monitors and adjusts the airflow stability in real time. The air source in the ventilator body 1 generates the required gas;

[0034] The top of the breathing tube 21 is connected to a first fixed tube 22. One end of the first fixed tube 22 is equipped with a fixed seat 25. Inside one side of the fixed seat 25, two symmetric first support plates 26 are installed. Inside the two first support plates 26, a first metal rod 27 and a first terminal 28 are respectively arranged together. Outside the first terminal 28, a first resistance wire 29 is arranged. Outside the first metal rod 27, a first sliding piece 210 is arranged. One side of the first sliding piece 210 is equipped with a connecting frame 211. One side of the connecting frame 211 is equipped with a hollow rod 212. One end of the hollow rod 212 is equipped with a first connecting plate 213. One side of the first connecting plate 213 is equipped with a humidity sensor probe 214. One end of the first branch pipe 23 is equipped with a mounting seat 215. The top and bottom of the mounting seat 215 are respectively provided with a first connecting pipe 216 and a second connecting pipe 217. Inside one side of the mounting seat 215, an adjusting seat 218 is installed. Inside both sides of the adjusting seat 218, a first electromagnet 219 and a second electromagnet 220 are respectively installed. Inside the adjusting seat 218, an iron block 221 is slidably connected. One end of the iron block 221 is equipped with a connecting rod 222. The top and bottom of the connecting rod 222 are respectively equipped with a first blocking plate 223 and a second blocking plate 224. The outer wall of the first blocking plate 223 is in fit with the inner wall of the first connecting pipe 216. The outer wall of the second blocking plate 224 is in fit with the inner wall of the second connecting pipe 217. The outer circumferences of the first connecting pipe 216 and the second connecting pipe 217 are respectively provided with a first air outlet pipe 225 and a second air outlet pipe 226 with control valves. The outer circumference of the second branch pipe 24 is provided with a third air outlet pipe 227 with a control valve. On the outer side of one side of the fixed seat 25, a first buzzer 228 is installed. On the outer side of the other side of the fixed seat 25, a first light 229 and a second light 230 are respectively arranged;

[0035] The humidity sensor probe 214 installed on the first fixed tube 22 monitors the humidity of the air flow in real time. When the humidity is abnormal, it triggers the first buzzer 228 to alarm through circuit connection. At the same time, the first light 229 or the second light 230 lights up to indicate that the humidity is too high or too low. Inside the first branch pipe 23, the mounting seat 215 is connected to the first air outlet pipe 225 and the second air outlet pipe 226 through the first connecting pipe 216 and the second connecting pipe 217. The first electromagnet 219 and the second electromagnet 220 in the adjusting seat 218 are respectively powered on or off according to the control signal, driving the first blocking plate 223 and the second blocking plate 224 on the connecting rod 222 to move, thereby adjusting the on-off inside the first connecting pipe 216 and the second connecting pipe 217 and realizing the adjustment of the air flow stability;

[0036] The breathing mask assembly 3 includes a breathing mask body 31. A connecting strap 32 is arranged outside the breathing mask body 31. A ventilation pipe 33 is installed on one side of the breathing mask body 31. A third connecting pipe 34 is installed at the bottom of the ventilation pipe 33. An installation box 35 is installed at one end of the ventilation pipe 33. A buzzer two 36 is installed on the outer side of one side of the installation box 35. A lighting lamp three 37 and a lighting lamp four 38 are respectively arranged on the outer side of the other side of the installation box 35. Two symmetric second brackets 39 are installed on one side inside the installation box 35. A second metal rod 310 and a second wiring terminal 311 are jointly installed inside the two second brackets 39 respectively. A second resistance wire 312 is arranged outside the second wiring terminal 311. A second sliding piece 313 is connected to the outside of the second metal rod 310. An installation frame 314 is installed at one end of the second sliding piece 313. A pressing rod one 315 and a pressing rod two 316 are respectively installed on both sides of the outside of the installation frame 314. A pressure sensor one 317 and a pressure sensor two 318 are respectively installed on one side of the two second brackets 39. The pressure sensor one 317 corresponds to the pressing rod one 315, and the pressure sensor two 318 corresponds to the pressing rod two 316;

[0037] The two pressure sensors one 317 and pressure sensors two 318 in the installation box 35 respectively correspond to the pressing rod one 315 and the pressing rod two 316. By sliding the second sliding piece 313 on the second resistance wire 312 on the installation frame 314, the pressure change at the connection and fitting part between the breathing mask body 31 and the simulator is monitored in real time;

[0038] A connecting column 319 is installed on the outer side of one side of the installation frame 314. An adjusting plate 320 is installed at one end of the connecting column 319. The adjusting plate 320 is located inside the ventilation pipe 33. A pressure air bag ball 321 is arranged inside the third connecting pipe 34. A fixing frame one 322 and a fixing frame two 323 are respectively installed at the top end and the bottom end inside the breathing mask body 31. A red air bag 324 is installed on one side of the fixing frame one 322. A blue air bag 325 is installed on one side of the fixing frame two 323. A pressure sensor three 326 is arranged inside the fixing frame one 322. A pressure sensor four 327 is arranged inside the fixing frame two 323;

[0039] The red air bag 324 and the blue air bag 325 inside the breathing mask body 31 respectively monitor the pressure change inside the breathing mask through the pressure sensor three 326 and the pressure sensor four 327 inside the fixing frame one 322 and the fixing frame two 323; When the pressure is abnormal, the buzzer two 36 is triggered to alarm through the circuit connection, and at the same time, the lighting lamp three 37 or the lighting lamp four 38 lights up to indicate that the pressure is too high or too low; The pressure air bag ball 321 is located inside the third connecting pipe 34 and serves as an adjusting device.

[0040] The air source in the ventilator body 1 generates a stable air flow, which is transmitted to the pipeline assembly 2 and the connected breathing mask assembly 3. The breathing mask body 31 can be fixed on the simulator through the connecting belt 32. When the air flow passes through the breathing tube 21, a part of the air flow will be dispersed into the first fixed tube 22, the first branch tube 23 and the second branch tube 24 with a control valve. The humidity sensor probe 214 in the first fixed tube 22 can detect the humidity of the air flow. If the detected air flow humidity is too high, at this time, the control valve of the third air outlet pipe 227 automatically opens, discharges the air flow of the pressure air bag 321, expands the area in the third connecting pipe 34, and discharges a large amount of the air flow simulating human exhalation at the breathing mask body 31, so as to reduce the humidity. When the humidity sensor probe 214 detects that the humidity is normal, the control valves at the third air outlet pipe 227 and the second branch tube 24 automatically close. When the air flow is in a dry state, the control valve of the second branch tube 24 opens, and the control valve at the third air outlet pipe 227 is in a closed state. At this time, a part of the air flow inflates the pressure air bag 321. After the pressure air bag 321 is inflated to a certain size, the control valve of the second branch tube 24 closes. At this time, the pressure air bag 321 reduces the leaked space of the third connecting pipe 34, indicating that the exhaust air volume becomes smaller and the air flow humidity increases. When the air flow humidity is too high, the warning light 1 229 lights up. When the air flow is dry, the warning light 2 230 lights up. In either case, it belongs to an abnormal phenomenon, and the buzzer 1 228 will sound to remind the operating trainee and adjust the corresponding situation in time;

[0041] When the air flow is too large, the first connecting plate 213 drives the connecting frame 211 installed at one end of the hollow rod 212 to move. The connecting frame 211 drives the first sliding piece 210 installed on one side to move. The first sliding piece 210 moves outside the first metal rod 27. When the first sliding piece 210 gradually locates at the top of the first resistance wire 29, it represents that the current is getting larger and the air flow intake is more. On the contrary, when the first sliding piece 210 moves downward, it represents that the current is smaller and the air flow intake is less. The amount of air flow intake is transmitted to the breathing mask body 31 through the breathing tube 21. Since the breathing mask body 31 is connected to the simulator and is in a sealed state, the air flow flows from the ventilation pipe 33 and is discharged from the third connecting pipe 34, and the size of the discharged air flow can be detected separately;

[0042] When the airflow in the vent pipe 33 is relatively large, the regulating plate 320 drives the mounting bracket 314, i.e., the second sliding piece 313 mounted at the bottom, to move through the connecting column 319. When the second sliding piece 313 gradually moves to the leftmost end, it represents a relatively large air output. When the second sliding piece 313 gradually approaches the rightmost end, it represents a relatively small air output. When the air output is relatively large, the second pressure lever 316 mounted on one side of the mounting bracket 314 squeezes the second pressure sensor 318. At this time, the fourth light 38 lights up, and the gas volume generated by the air source in the ventilator body 1 is automatically reduced. When the air output is relatively small, the first pressure lever 315 mounted on one side of the mounting bracket 314 squeezes the first pressure sensor 317. At this time, the third light 37 lights up, and the gas volume generated by the air source in the ventilator body 1 increases. In either case, the second buzzer 36 sounds to remind the operator.

[0043] Embodiment 2

[0044] In this Embodiment 2, other structures remain unchanged. Different from Embodiment 1, a part of the airflow flows to the first branch pipe 23 to simulate human breathing for the convenience of the operator to observe. The airflow flows into the fixed seat 25. When the second electromagnet 220 is energized, the iron block 221 is attracted to the second electromagnet 220. At this time, the iron block 221 drives the connecting rod 222 and the second plugging plate 224 mounted at the bottom to move downward. When the second plugging plate 224 is located in the second connecting pipe 217, the first connecting pipe 216 is exposed, and the airflow then flows through the first connecting pipe 216 to the red airbag 324. The control valve at the first air outlet pipe 225 is in a closed state, and the red airbag 324 gradually expands. When the pressure sensor three 326 senses that the pressure value reaches the set value after the red airbag 324 is inflated to a certain extent, the second electromagnet 220 is de-energized, and the first electromagnet 219 is energized. At this time, the iron block 221 moves upward and is attracted to the first electromagnet 219. The second plugging plate 224 disengages from the second connecting pipe 217, and the first plugging plate 223 is located in the first connecting pipe 216. At this time, the control valve of the first air outlet pipe 225 is opened to discharge the gas in the red airbag 324, and the control valve of the second air outlet pipe 226 is closed to inflate the blue airbag 325. And the inflation volume is detected by the pressure sensor four 327. The above process is cycled to simulate human breathing. And the breathing mask body 31 is made of a transparent material for the convenience of the operator to observe and improve the teaching quality.

[0045] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0046] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A portable ventilator convenient for teaching, comprising a ventilator body (1), characterized in that: Also includes: A pipe assembly (2) and a breathing mask assembly (3), one end of the pipe assembly (2) is connected to a breathing machine body (1), the pipe assembly (2) and the breathing mask assembly (3) are connected, the pipe assembly (2) comprises a breathing tube (21), a first branch pipe (23) and a second branch pipe (24), one end of the first branch pipe (23) and the second branch pipe (24) are respectively connected to the breathing tube (21), the airflow in the breathing tube (21) flows toward the first branch pipe (23) and the second branch pipe (24), the airflow in the first branch pipe (23) is used to simulate the breathing frequency of a human body, and the airflow in the second branch pipe (24) controls the air output volume in the breathing mask assembly (3).

2. The portable ventilator for teaching purposes according to claim 1, characterized in that: The top of the breathing tube (21) is connected to a first fixed tube (22), one end of the first fixed tube (22) is installed with a fixed seat (25), one side of the interior of the fixed seat (25) is installed with two symmetrical first support plates (26), the interiors of the two first support plates (26) are respectively provided with a first metal rod (27) and a first terminal (28), the outside of the first terminal (28) is provided with a first resistance wire (29), the outside of the first metal rod (27) is provided with a first slide (210), one side of the first slide (210) is installed with a connecting frame (211), one side of the connecting frame (211) is installed with a hollow rod (212), one end of the hollow rod (212) is installed with a first connecting plate (213), and one side of the first connecting plate (213) is installed with a humidity sensor probe (214).

3. The portable ventilator for teaching purposes according to claim 2, characterized in that: A mounting seat (215) is installed at one end of the first branch pipe (23), and a first connecting pipe (216) and a second connecting pipe (217) are respectively arranged at the top and bottom of the mounting seat (215), an adjusting seat (218) is installed at one side of the interior of the mounting seat (215), and a first electromagnet (219) and a second electromagnet (220) are respectively installed at two sides of the interior of the adjusting seat (218), an iron block (221) is slidably connected to the interior of the adjusting seat (218), a connecting rod (222) is installed at one end of the iron block (221), and a first blocking plate (223) and a second blocking plate (224) are respectively installed at the top and bottom of the connecting rod (222).

4. The portable ventilator for teaching purposes according to claim 3, characterized in that: The outer wall of the first blocking plate (223) is in contact with the inner wall of the first connecting tube (216), and the outer wall of the second blocking plate (224) is in contact with the inner wall of the second connecting tube (217). The first connecting tube (216) and the second connecting tube (217) are respectively provided with a first air outlet pipe (225) and a second air outlet pipe (226) with a control valve on their outer peripheries, and the third air outlet pipe (227) with a control valve on their outer peripheries are provided with a buzzer 1 (228) on one side of the exterior of the fixing seat (25), and a light 1 (229) and a light 2 (230) are respectively provided with the other side of the exterior of the fixing seat (25).

5. The portable ventilator for teaching purposes according to claim 1, characterized in that: The breathing mask assembly (3) comprises a breathing mask body (31), a connecting belt (32) is arranged outside the breathing mask body (31), a ventilation pipe (33) is installed on one side of the breathing mask body (31), a third connecting pipe (34) is installed at the bottom of the ventilation pipe (33), an installation box (35) is installed at one end of the ventilation pipe (33), a buzzer 2 (36) is installed on one side of the outside of the installation box (35), and a light 3 (37) and a light 4 (38) are respectively arranged on the other side of the outside of the installation box (35).

6. The portable ventilator for teaching purposes according to claim 5, characterized in that: Two symmetrical second brackets (39) are installed on one side of the interior of the installation box (35); a second metal rod (310) and a second terminal (311) are installed inside the two second brackets (39) respectively; a second resistance wire (312) is arranged outside the second terminal (311); and a second sliding sheet (313) is connected to the outside of the second metal rod (310).

7. The portable ventilator for teaching purposes according to claim 6, characterized in that: A mounting frame (314) is installed at one end of the second slide (313), and pressure rod one (315) and pressure rod two (316) are installed on both sides of the outside of the mounting frame (314), and pressure sensor one (317) and pressure sensor two (318) are installed on one side of the two second brackets (39), respectively, and pressure sensor one (317) corresponds to pressure rod one (315), and pressure sensor two (318) corresponds to pressure rod two (316).

8. The portable ventilator for teaching purposes according to claim 7, characterized in that: A connecting column (319) is installed on one side of the outside of the mounting frame (314), an adjusting plate (320) is installed on one end of the connecting column (319), the adjusting plate (320) is located in the ventilation pipe (33), and a pressure airbag ball (321) is arranged inside the third connecting pipe (34).

9. The portable ventilator for teaching purposes according to claim 8, characterized in that: A fixing frame 1 (322) and a fixing frame 2 (323) are respectively installed at the top and bottom ends of the inner part of the breathing mask body (31), and a red air bag (324) is installed on one side of the fixing frame 1 (322).

10. The portable ventilator for teaching purposes according to claim 9, characterized in that: A blue air bag (325) is installed on one side of the second fixing frame (323), a pressure sensor three (326) is arranged inside the first fixing frame (322), and a pressure sensor four (327) is arranged inside the second fixing frame (323).

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