CN113633861A

CN113633861A - Bidirectional ventilation structure and oxygen supply device capable of adjusting oxygen inhalation concentration

Info

Publication number: CN113633861A
Application number: CN202110890225.9A
Authority: CN
Inventors: 田鸣; 白俠路; 丁滔
Original assignee: Beijing Mingdashu Medical Technology Co ltd
Current assignee: Beijing Mingdashu Medical Technology Co ltd
Priority date: 2021-08-04
Filing date: 2021-08-04
Publication date: 2021-11-12
Also published as: WO2023011034A1

Abstract

The invention relates to a bidirectional ventilation structure and an oxygen supply device containing the same and capable of adjusting the concentration of inhaled oxygen. The bidirectional ventilation structure comprises a ventilation valve mechanism, and the ventilation valve mechanism is arranged on the pipe wall of the ventilation pipeline and used for keeping bidirectional gas circulation inside and outside the ventilation pipeline and expanding an airflow channel flowing from the ventilation pipeline to the outside when the internal pressure of the ventilation pipeline is greater than the external pressure. The oxygen supply device who contains two-way ventilation structure is provided with two pipelines of breathing in pipeline and exhaling pipeline, rethread suction valve piece and exhaling valve piece are responsible for respectively breathing in and the gas flow of exhaling, the convection current route through adjusting two-way ventilation structure on exhaling pipeline pipe wall realizes the regulation to inhaling oxygen concentration, the principle is simple more reasonable, make the pipeline more compact, reduce the dead space volume, improve ventilate and give the oxygen effect, can also connect all kinds of oxygen supply devices that have standard joint simultaneously, such as face guard, the nose cup etc., the suitability is wider, can adjust according to clinical demand and inhale oxygen concentration at reasonable scope.

Description

Bidirectional ventilation structure and oxygen supply device capable of adjusting oxygen inhalation concentration

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a bidirectional ventilation structure and an oxygen supply device with the same and capable of adjusting the concentration of inhaled oxygen.

Background

Hypoxemia refers to a deficiency of oxygen in the blood, which is mainly manifested by a decrease in partial pressure of arterial blood oxygen (PaO2) and pulse oximetry (SpO2), and is usually caused by hypoventilation or dysfunction in ventilation due to airway obstruction, respiratory depression, pulmonary diseases, etc., and oxygen supply is an effective means for preventing the occurrence of hypoxemia. Nowadays, painless technology is widely applied to clinic, and the painless technology has good sedation and analgesia, improves diagnosis and treatment completion rate and accuracy rate, meets the requirements of people on comfortable medical treatment, is accepted by most examinees and medical workers, and the most common painless technology in an endoscope room or a daytime operating room adopts deep sedation and general anesthesia for keeping spontaneous breathing. The most dangerous conditions of such sedation and anesthesia are hypoxemia caused by airway obstruction, apnea, etc., and inhalation of high concentrations of oxygen is an important method for preventing and treating hypoxemia. However, in recovery rooms, wards and other patients requiring long-term oxygen therapy, inhalation of excessive oxygen concentration is prevented to avoid the risk of oxygen poisoning. Therefore, the adjustable oxygen supply device which can supply oxygen with high concentration and adjust the concentration of the inhaled oxygen to a safe range is designed, and has important clinical significance.

In a patent document with publication number CN111135413A, a sealed oxygen inhaler is disclosed, which is provided with a gas storage bag and an oronasal mask, and adjusts the proportion of the mixed external air through a proportional control valve including a valve and a baffle, but this technical solution still has certain disadvantages in practical use:

1. the same cross section vertical to the pipeline is simultaneously provided with an air passage valve which can enter and exit in two directions, so that the diameter of the pipeline is larger, the pipeline is thicker and cannot be externally connected with a standard interface commonly used in the medical field in order to meet the oxygen inhalation requirement of a human body;

2. the oxygen inlet amount and the air inlet amount are simultaneously adjusted by rotating the valve baffle, and the method is not practical, so that the adjustment precision is difficult to grasp, the operation amount of medical personnel is increased, and errors are easy to occur;

3. the rotary valve baffle structure is complex to manufacture and is not beneficial to industrial mass production;

4. when oxygen is inhaled by the oxygen inhaler, the pipeline is thick and is integrally formed with the oral-nasal mask, so that a large dead space is formed in the oral-nasal mask and the pipeline, and the oxygen is not easily inhaled.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a bidirectional ventilation structure and an oxygen supply device capable of adjusting the concentration of inhaled oxygen.

The technical problem to be solved by the invention is realized by adopting the following technical scheme:

a bidirectional ventilation structure comprises a ventilation valve mechanism, wherein the ventilation valve mechanism is arranged on the pipe wall of a ventilation pipeline and is used for keeping bidirectional gas circulation inside and outside the ventilation pipeline and expanding an airflow channel flowing from the ventilation pipeline to the outside when the internal pressure of the ventilation pipeline is higher than the external pressure.

The vent valve mechanism comprises a first air hole, a convection passage and a valve body installed in the first air hole, wherein the valve body can be opened to the outside when the internal pressure of the vent pipeline is higher than the external pressure, the convection passage can maintain the bidirectional gas circulation inside and outside the vent pipeline, and the ventilation capacity of the convection passage can be adjusted.

The valve body comprises a valve column and an air ventilation valve plate, the valve column is slidably mounted in the first air hole, the air ventilation valve plate is arranged on the valve column, and a stop block is arranged on the valve column to prevent the valve column from sliding down from the first air hole.

The convective pathway includes a gap that resides between the vent flap and the first air aperture.

The convection passage includes a convection hole disposed on the vent line.

And the convection hole is provided with an adjusting valve plate, and the ventilation area of convection can be changed through the adjusting valve plate.

The bidirectional ventilation structure further comprises a sleeve, the sleeve is rotatably sleeved on the ventilation pipeline, the sleeve is provided with a convection outer hole matched with the convection hole, and the communicated area between the convection outer hole and the convection hole can be changed by rotating the sleeve.

The utility model provides an oxygen supply device, includes the gas-supply pipe, the gas-supply pipe includes inhalation pipeline and exhale pipeline, its characterized in that: the breathing pipeline is provided with a bidirectional ventilation structure, the breathing pipeline is provided with a breathing one-way valve mechanism, and the breathing one-way valve mechanism is used for controlling one-way gas circulation from the breathing pipeline to the breathing pipeline.

The gas storage part is connected with the air suction pipeline and can be in gas circulation with the air suction pipeline.

The air suction pipeline is internally provided with a partition board, the partition board divides the air suction pipeline into an air inlet passage and an air outlet passage, and the air inlet passage is connected with an air inlet pipe.

The air suction one-way valve mechanism comprises an air hole cover and an air suction valve plate, the air hole cover is installed at one end, close to the air suction pipeline, of the air suction pipeline, a second air hole is formed in the air hole cover, the air hole cover seals the air inlet channel to prevent the air in the air inlet channel from flowing to the air suction pipeline, the air suction valve plate is installed on the air hole cover, and the air suction valve plate completely covers the second air hole and can be opened when the pressure in the air outlet channel is larger than the pressure in the air suction pipeline.

The invention has the advantages and positive effects that:

1. the oxygen supply device is provided with an inhalation pipeline and an exhalation pipeline, and the inhalation pipeline and the exhalation pipeline are respectively responsible for gas circulation of inhalation and exhalation through an inhalation valve plate and an exhalation valve plate. Particularly, the adjustment of the concentration of the inhaled oxygen is realized by adjusting the convection passage of the bidirectional ventilation structure on the wall of the breathing pipeline, and the adjustment is simpler and more reasonable than a Venturi principle, so that the pipeline is more compact on the whole, the dead space amount is reduced, the ventilation and oxygen supply effects are improved, meanwhile, the structure also allows one end of the ventilation structure to be set to have a 15mm standard conical interface, for example, various oxygen supply devices with standard joints, such as a face mask, a nose mask, other breathing pipelines and the like, and the clinical application range is remarkably expanded.

2. The ventilation valve mechanism of the bidirectional ventilation structure can keep bidirectional gas circulation inside and outside the ventilation pipeline, so that when the oxygen supply device comprising the bidirectional ventilation structure is used, oxygen in the air suction pipeline enters the exhaling pipeline when air is sucked, and meanwhile, external air also enters the exhaling pipeline.

3. The ventilation capacity of the ventilation valve mechanism of the two-way ventilation structure can be adjusted, so that the oxygen supply device comprising the two-way ventilation structure can provide oxygen concentration in a range of 21% to close to 100%, for example, and therefore the oxygen concentration in the inhaled gas of a patient can be adjusted to a reasonable range according to clinical requirements. For example, the oxygen delivery device described above can provide both a relatively high oxygen concentration (e.g., up to 90% or even near 100% oxygen concentration) in cases of hypoxemia or the like, and a safe range of oxygen concentration (e.g., 50-60% oxygen concentration) in cases where long-term oxygen therapy is required.

4. The bidirectional ventilation structure and the oxygen supply device have simple structures and are easy to prepare.

Drawings

FIG. 1 is a schematic front view of the bi-directional vent structure with a transverse gap remaining in example 1;

FIG. 2 is a schematic cross-sectional view of the bi-directional vent with transverse gap remaining in example 1;

FIG. 3 is a schematic cross-sectional view of the bi-directional vent with longitudinal gaps remaining in example 1;

FIG. 4 is a schematic view of the first air hole and the vent valve plate in an arc shape;

FIG. 5 is a schematic front view of the two-way ventilation structure of example 2;

FIG. 6 is a schematic front view of the two-way ventilation structure of example 3;

FIG. 7 is a schematic sectional view of the two-way vent structure of embodiment 4;

FIG. 8 is an enlarged view of a portion of FIG. 7 encircled and positioned;

FIG. 9 is a schematic view of the overall structure of the oxygen supplying apparatus;

FIG. 10 is a schematic cross-sectional view of an inhalation line in an oxygen delivery device;

FIG. 11 is a schematic side view of an oxygen delivery device with an inhalation line.

Wherein, 1, a first air hole; 211. a gap; 212. a convection hole; 3. a valve body; 4. a spool; 5. a ventilation valve plate; 6. a stopper; 7. adjusting a valve plate; 8. a sleeve; 9. a convective outer bore; 10. a gas delivery pipe; 11. an air intake pipeline; 12. an exhalation line; 13. a gas storage member; 14. a partition plate; 151. an intake passage; 152. an air outlet passage; 16. an air inlet pipe; 17. a vent cover; 18. an air suction valve plate; 19. a second air hole; 20. mounting holes; 21. a card slot; 22. positioning holes; 23. a positioning column; 24. a positioning spring; 25. a top block; 26. and (4) mushroom caps.

Detailed Description

The invention is described in further detail below with reference to the accompanying drawings:

example 1

As shown in fig. 1 and 2, the present invention provides a two-way ventilation structure, which includes a ventilation valve mechanism, wherein the ventilation valve mechanism is disposed on a pipe wall of a ventilation pipeline, and the ventilation valve mechanism is integrally formed or connected by a mounting structure or an external connecting member; the vent valve mechanism can maintain the capability of gas convection between the inside and the outside of the vent pipeline, and enlarge an airflow passage from the vent pipeline to the outside when the pressure inside the vent pipeline is greater than the external pressure, so that the airflow inside the vent pipeline can be quickly dissipated to the outside.

In the present invention, the vent valve mechanism includes a first vent 1, a convection passage and a valve body 3 installed in the first vent 1, wherein the valve body 3 can be opened to the outside under the condition that the internal pressure of the vent pipe is greater than the external pressure, so that the gas inside the vent pipe flows to the outside, and the convection passage can always provide convection capability inside and outside the vent pipe, and in some examples, the ventilation capability of the convection passage can be adjusted.

In some examples, the first air hole 1 may be, but is not limited to, a cross-shaped air hole, and at the same time, a mounting hole 20 is further opened at the center of the first air hole 1, the valve body 3 includes a valve post 4 and a vent valve plate 5, the valve post 4 is slidably inserted into the mounting hole 20, and in some examples, the diameter of the valve post 4 is slightly smaller than that of the mounting hole 20 so as to facilitate mounting and dismounting the valve post 4.

In some examples, the vent flap 5 may be, but is not limited to, a circular soft material film, and the vent flap is integrally sleeved on the valve post 4, and when the internal pressure of the vent pipe is greater than the external pressure, the vent flap 5 may be bent and deformed to the outside, thereby enlarging the air flow path from the inside to the outside of the vent pipe. In some examples, the diameter and length of the spool 4 between the stop 6 and the valve plate 5 are slightly smaller than the mounting hole 20, such that the valve body 3 can move up and down in the mounting hole 20, and when the internal pressure of the vent line is greater than the external pressure, the vent plate 5 can move outward, thereby enlarging the air flow path from the inside of the vent line to the outside.

In some examples, the valve column 4 is further provided with a stopper 6 for preventing the valve column 4 from sliding off the mounting hole 20, as shown in fig. 2, the stopper 6 may be, but is not limited to, an inverted cone shape, and when the valve column 4 is to be inserted into the mounting hole 20, the stopper 6 may penetrate into the mounting hole 20 when a certain pressure is applied, and similarly, the stopper 6 may also penetrate out of the mounting hole 20 when a certain pulling force is applied.

In some examples, the vent valve flap 5 covers only a portion of the first vent 1 when the vent line internal pressure is less than the external pressure. And/or, thus, in some examples, the convection passage includes a gap 211 remaining between the vent flap 5 and the first air vent 1, and, in some examples, the gap 211 may be formed by the vent flap 5 failing to completely block off the vent portion of the first air vent 1, resulting in a lateral gap remaining therebetween as shown in fig. 1; meanwhile, in some examples, the gap 211 may also be formed by leaving a longitudinal gap as shown in fig. 3 between the vent valve plate 5 and the first air hole 1 because the vent valve plate is not tightly attached to the first air hole; additionally, in some examples, the gap 211 may also include both the lateral gap and the longitudinal gap described above.

In addition, since the valve body 3 can be taken out from the mounting hole 20, the valve body 3 with different vent valve plates 5 can be selected for use according to the actual use requirement, and the size of the gap 211 is changed by changing the shape and the specification of the vent valve plates 5, so that the ventilation capacity of the flow passage is adjusted.

In addition, in some examples, as shown in fig. 4, the first air hole 1 is in an arc shape as a whole, and the vent valve plate 5 is also in an arc shape with a smaller arc shape, and when the two are attached, a gap 211 is left at the outer side edge.

Example 2

As shown in fig. 5, different from the above-mentioned embodiment, in the present embodiment, the convection passage includes the convection hole 212, and the convection hole 212 is directly disposed on the vent pipe, at this time, in some examples, the vent valve sheet 5 may completely block the vent portion of the first air hole 1, only when the pressure in the vent pipe is greater than the external pressure, the first air hole 1 has the ventilation capability after the vent valve sheet 5 is opened, and when the vent valve sheet 5 is not opened, the vent pipe performs the gas convection in both the inside and the outside directions through the convection hole 212 directly disposed on the pipe wall; in addition, in some examples, the vent valve plate 5 may still remain the gap 211 with the vent portion of the first air vent 1, i.e., both the gap 211 and the convection hole 212 act as a convection path.

In addition, fig. 5 shows only one convection hole 212, but the present invention is not limited thereto. One or more convection holes 212 may also be provided, the size, shape, number, etc. of the convection holes may be set according to actual needs, and corresponding valve plates (not shown) may be provided for each convection hole, so as to further adjust the convection capacity of the gas inside and outside the ventilation pipeline by controlling the opening and closing of each convection hole, etc.

Example 3

In some examples, as shown in fig. 6, an adjusting valve sheet 7 is installed at the convection hole 212, the adjusting valve sheet 7 can completely cover the convection hole 212 to prevent gas from entering and exiting from the convection hole 212, and when a user rotates the adjusting valve sheet 7, the area of the adjusting valve sheet 7 covering the convection hole 212 can be changed, so as to adjust the ventilation capacity of the convection hole 212.

Example 4

In some examples, as shown in fig. 7, the bidirectional ventilation structure further includes a sleeve 8, the sleeve 8 is rotatably sleeved on the ventilation pipeline, and meanwhile, the sleeve 8 is provided with an external convection hole 9 matched with the convection hole 212, so that when the external convection hole 9 and the convection hole 212 are completely overlapped, the user rotates the sleeve 8, and at this time, the whole ventilation capacity of the convection hole 212 can be released; when the convection outer hole 9 is partially overlapped with the convection hole 212, partial ventilation capacity of the convection hole 212 can be released, and the user can change the overlapped area of the convection outer hole 9 and the convection hole 212 by rotating the sleeve 8, thereby adjusting the ventilation capacity of the convection hole 212; when the convection outer hole 9 and the convection hole 212 are not overlapped at all, the convection hole 212 can be closed to prevent the inside and outside air of the ventilation pipeline from flowing.

In addition, in some examples, the bi-directional vent structure further includes a portion for positioning in cooperation with the cannula 8, as shown in figure 8, the positioning part can be, but is not limited to, a clamping groove 21 arranged on the ventilation pipeline, a plurality of positioning holes 22 arranged on the sleeve 8, a positioning column 23 slidably mounted in the clamping groove 21, a positioning spring 24 connected between the positioning column 23 and the end face of the clamping groove 21, and a top block 25 slidably mounted in the positioning hole 22, wherein the positioning post 23 can be inserted into the positioning hole 22 in a sliding manner, and when the positioning post 23 corresponds to the positioning hole 22, under the action of the positioning spring 24, the positioning post 23 is inserted into the positioning hole 22, and a part of the top block 25 is pushed out of the positioning hole 22 by the positioning post 23, when the sleeve 8 needs to be rotated again, the user only needs to press the top block 25 to eject the positioning post 23 out of the positioning hole 22.

Example 5

As shown in fig. 9, 10 and 11, the invention also provides an oxygen supply device with the bidirectional ventilation structure and capable of adjusting the concentration of the inhaled oxygen, the device can be connected with external oxygen supply equipment to deliver oxygen to human body, mainly comprises a gas delivery pipe 10, the gas delivery pipe 10 is divided into an inhalation pipeline 11 and an exhalation pipeline 12, the bidirectional ventilation structure is arranged on the expiration pipeline 12, and the inspiration pipeline 11 is provided with an inspiration one-way valve mechanism which can control the one-way gas circulation from the inspiration pipeline 11 to the expiration pipeline 12, when a human body inhales, oxygen enters the expiration pipeline 12 from the inspiration pipeline 11 through the inspiration one-way valve mechanism, then flows out from the expiration pipeline and finally enters the human body, in the process, as the bidirectional ventilation structure is arranged on the expiration pipeline, under the condition that the oxygen supply flow is kept constant, external air enters the expiration pipeline and is mixed with the oxygen flow. Furthermore, as described above, the bidirectional ventilation structure can adjust the convection capacity of the gas inside and outside the ventilation pipeline through the convection passage. Therefore, the amount of air mixed into the oxygen flow can be adjusted according to actual needs, thereby adjusting the intake oxygen concentration. The oxygen concentration may be adjusted, for example, in the range of 21% to near 100%. In particular, by adjusting the convective pathways of the bi-directional aeration structure, high oxygen concentrations, e.g., up to 90% or even close to 100%, may be provided, as well as a safe range of oxygen concentrations, e.g., 50-60%.

The setting is breathed in and is exhaled two pipelines, divides the work separately and makes the holistic size of pipeline more suitable, on the one hand, can be convenient for pipeline and standard joint connection use, and on the other hand can reduce the dead space volume in the pipeline use, improves and ventilates and give oxygen effect, in addition, in some examples, exhale pipeline 12 can but not be limited to and use with common devices such as nose cup, face guard.

In some examples, the inhalation pipeline 11 and the exhalation pipeline 12 are separated and connected together by a plug-in connection, a connection structure or an external connection, and in some examples, the inhalation pipeline 11 and the exhalation pipeline 12 are integrated, and the integrated pipeline is divided into the inhalation pipeline 11 and the ventilation pipeline by arranging an inhalation one-way valve mechanism.

In some examples, the exhalation tube 12 is provided with a plurality of bi-directional ventilation structures that cooperate with each other to regulate the amount of air that is mixed into the exhalation tube, thereby enabling the oxygen concentration to be regulated in a range of, for example, 21% to approximately 100%.

In some examples, the oxygen inhalation device further includes a gas storage 13, oxygen delivered from an external device is first stored in the gas storage 13 and then delivered from the gas storage 13 to the inhalation tube 11, so the gas storage 13 needs to be connected to the inhalation tube 11 and the external device, during the diagnosis and treatment, oxygen delivered from an external oxygen supply device is stored in the gas storage 13, and since oxygen required for 1 clock per person is a little more than one liter, the gas storage capacity of the gas storage 13 is generally 1 liter or 2 liters, but is not limited thereto.

In addition, in some examples, the gas storage member 13 may be, but is not limited to, an air bag, and is connected to the suction line 11 by means of bonding or hot rolling, but is not limited thereto.

In some examples, the partition 14 is disposed in the inhalation pipeline 11, the partition 14 divides the inhalation pipeline 11 into an air inlet passage 151 and an air outlet passage 152, and the air inlet pipe 16 is connected to the air inlet passage 151, so that an external device can be directly connected to the air inlet pipe 16, and oxygen delivered by the external device enters the air storage 13 through the air inlet passage 151 in the inhalation pipeline 11, which can simplify the structure of the whole device, and the air storage 13 does not need to be connected to an external oxygen supply device, thereby reducing the volume of the whole device.

In some examples, the inhalation one-way valve mechanism includes an air hole cover 17 and an inhalation valve plate 18, wherein the air hole cover 17 is installed on one end of the inhalation pipeline 11 close to the exhalation pipeline 12, the second air hole 19 is provided on the air hole cover 17, and in some examples, the air hole cover 17 blocks the air inlet passage 151 so that oxygen in the air inlet passage 151 can only enter the air storage 13 and cannot flow into the exhalation pipeline 12, the inhalation valve plate 18 is installed on the air hole cover 17, and the inhalation valve plate 18 can completely cover the second air hole 19 and can be opened when the pressure in the exhalation passage 152 is greater than the pressure in the exhalation pipeline, so that the airflow in the exhalation passage 152 can enter the exhalation pipeline 12.

In some examples, the vent cover 17 is cross-shaped, a mushroom cap 26 is disposed at the center of the vent cover 17, and the suction valve plate 18 is a circular soft material film and is sleeved on the mushroom cap 26.

In some examples, the air hole cover 17 is arc-shaped, and the corresponding air suction valve plate 18 is also arc-shaped, and the two are mutually adapted to make the air suction valve plate 18 fit on the air hole cover 17 and completely block the second air hole 19.

Although the above individual embodiments are described separately, the technical features described in the different embodiments and the embodiments thereof may also be combined with each other.

It should be emphasized that the embodiments described herein are illustrative rather than restrictive, and thus the present invention is not limited to the embodiments described in the detailed description, but also includes other embodiments that can be derived from the technical solutions of the present invention by those skilled in the art.

Claims

1. The utility model provides a two-way ventilation structure, includes the ventilation valve mechanism, the ventilation valve mechanism sets up on the pipe wall of breather line, its characterized in that: the vent valve mechanism is used for keeping bidirectional gas circulation inside and outside the vent pipeline and expanding an airflow passage from the vent pipeline to the outside when the internal pressure of the vent pipeline is higher than the external pressure.

2. A bi-directional venting structure as set forth in claim 1, wherein: the vent valve mechanism comprises a first air hole (1), a convection passage and a valve body (3) installed in the first air hole (1), wherein the valve body (3) can be opened to the outside when the internal pressure of the vent pipeline is greater than the external pressure, the convection passage can keep the bidirectional gas circulation inside and outside the vent pipeline, and the ventilation capacity of the convection passage can be adjusted.

3. The bi-directional venting structure of claim 2, wherein: the valve body (3) comprises a valve column (4) which is slidably mounted in the first air hole (1) and an air ventilation valve plate (5) which is arranged on the valve column (4), and a stop block (6) is arranged on the valve column (4) to prevent the valve column (4) from sliding down from the first air hole (1).

4. The bi-directional venting structure of claim 3, wherein: the convection passage includes a gap (211) remaining between the vent valve plate (5) and the first air hole (1).

5. The bi-directional venting structure of claim 2 or 4, wherein: the convection passage includes a convection hole (212) disposed on the vent line.

6. The bi-directional venting structure of claim 5, wherein: the convection hole (212) is provided with an adjusting valve plate (7) and the ventilation area of the convection hole (212) can be changed through the adjusting valve plate (7).

7. The bi-directional venting structure of claim 5, wherein: the bidirectional ventilation structure further comprises a sleeve (8), the sleeve (8) is rotatably sleeved on the ventilation pipeline, the sleeve (8) is provided with convection outer holes (9) matched with the convection holes (212), and the communicated area between the convection outer holes (9) and the convection holes (212) can be changed by rotating the sleeve (8).

8. An oxygen supply device, comprising an air delivery pipe (10), wherein the air delivery pipe (10) comprises an inhalation pipeline (11) and an exhalation pipeline (12), and is characterized in that: the expiration pipeline (12) is provided with a bidirectional ventilation structure according to any one of claims 1 to 7, the inspiration pipeline (11) is provided with an inspiration one-way valve mechanism, and the inspiration one-way valve mechanism is used for controlling one-way gas circulation from the inspiration pipeline (11) to the expiration pipeline (12).

9. Oxygen delivery device according to claim 8, characterized in that: the gas storage device is characterized by further comprising a gas storage part (13), wherein the gas storage part (13) is connected with the gas suction pipeline (11) and can be in gas circulation with the gas suction pipeline (11).

10. Oxygen delivery device according to claim 9, characterized in that: be provided with baffle (14) in inhaling pipeline (11), baffle (14) divide inhaling pipeline (11) into admit air passageway (151) and air outlet passage (152), it is equipped with intake pipe (16) to connect on admit air passageway (151).

11. Oxygen delivery device according to claim 8, characterized in that: the check valve mechanism of breathing in includes air vent lid (17) and air suction valve piece (18), air vent lid (17) are installed on the one end that air suction pipeline (11) are close to exhaling pipeline (12), be provided with second gas pocket (19) on air vent lid (17) and air vent lid (17) will admit air passageway (151) shutoff in order to prevent the gas flow in the passageway of admitting air (151) to exhale gas pipeline (12), air suction valve piece (18) are installed on air vent lid (17), air suction valve piece (18) cover second gas pocket (19) completely and can be opened when the pressure in passageway of giving vent to anger (152) is greater than the pressure in exhaling pipeline (12).