A high-altitude oxygen supply and oxygen-saving breathing apparatus

Abstract

The present invention belongs to the technical field of manufacturing high-altitude oxygen masks, and particularly relates to a high-altitude oxygen supply and oxygen-saving respirator. The present invention is composed of an oxygen storage cotton protective cover, oxygen storage cotton, an oxygen storage cotton base, a headband connecting band, a storage cotton inlet pipe, an oxygen mask body, an oxygen inlet pipe, an oxygen coil pipe, an inhalation valve seat, a normally closed negative pressure one-way inhalation valve, a normally closed positive pressure one-way exhalation valve, an exhalation valve seat, and a duckbill one-way drainage valve. When used at high altitudes, the present invention has the oxygen storage function of the oxygen storage cotton, realizes the oxygen accumulation and supply in the respirator with low-flow oxygen supply; has a sealed structure design, and the opening and closing combination of the mask valve group is driven by the human breathing pressure and automatically matches the human breathing rhythm, thereby improving the utilization rate of oxygen and realizing the economical use of oxygen carried at high altitudes; has the functions of reducing the oxygen supply temperature difference and dehumidifying inside the mask, and improves the comfort during long-term use.

Description

Technical Field

[0001] The present invention belongs to the technical field of manufacturing high-altitude oxygen masks, and particularly relates to a high-altitude oxygen supply and oxygen-saving respirator. Background Art

[0002] An oxygen supply respirator is a device that delivers stored or produced oxygen to supply human breathing, and is applicable to high-altitude areas, the civil aviation field, the clinical medicine field, etc. It plays an important role in alleviating acute altitude sickness, protecting the safety of flight attendants, and assisting in the treatment of diseases. The oxygen is thin in high-altitude areas, and the human body is prone to acute altitude sickness. A device that is easy to carry and continuously supplies oxygen is needed. At the same time, hypoxia in high altitudes increases the body burden and reduces the activity ability, so the requirement for oxygen conservation is high. The oxygen supply device and the respirator need to improve the oxygen carrying capacity and utilization rate as much as possible under the limited volume and weight. Liquid Oxygen (LOX), as a high-quality oxygen source, has obvious advantages in high-altitude oxygen supply applications due to its large oxygen storage density, high oxygen transportation efficiency, and good adaptability to the oxygen supply environment. However, the characteristic of a portable liquid oxygen storage and supply device is that once filled, the liquid oxygen will continuously and slowly vaporize. If the low-flow oxygen vaporized cannot be effectively utilized in time, it will cause the leakage and loss of the carried oxygen. At the same time, since the oxygen vaporized from the liquid oxygen has a lower temperature, it is necessary to heat up the supplied oxygen to reduce the temperature difference to improve the comfort of oxygen supply.

[0003] The oxygen supply respirator adopts a mask method, which is beneficial to accumulating oxygen around the mouth and nose, enabling the mouth and nose to obtain a higher concentration of oxygen supply, thereby improving the oxygen supply efficiency of human breathing. Ordinary medical oxygen masks and civil aviation oxygen masks are applicable to the oxygen supply state with a large flow rate. The tightness of the combination between them and the wearer's face and the mask body itself is insufficient. Only a part of the supplied oxygen is utilized by human breathing, and another part of the oxygen leaks from the mask wearing gap or internal gap, resulting in oxygen waste and being difficult to be applicable to the low-flow continuous oxygen supply state of a portable liquid oxygen storage and supply device. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a high-altitude oxygen supply and oxygen-saving respirator, which can realize the oxygen accumulation and supply in the respirator during low-flow oxygen supply at high altitudes, and is a high-altitude oxygen supply and oxygen-saving respirator applicable to portable liquid oxygen storage and supply devices. When a person exhales, the oxygen storage cotton stores oxygen. Due to the certain airtightness of the mask itself, the leakage of oxygen is controlled. When a person inhales, a negative pressure is formed in the space between the wearer's face and the respirator, and the oxygen mask body supplies oxygen, that is, adsorbs the oxygen retained in the oxygen storage cotton, and is released by the air purging into the mask during inhalation, and supplies oxygen after mixing with the air. An oxygen coil is installed inside the oxygen mask body. When the low-temperature oxygen in the tube flows, it exchanges heat with the humid and hot gas exhaled by the human body in the mask, so that the low-temperature oxygen in the tube is heated, and at the same time, the water vapor in the mask condenses on the outer wall of the oxygen coil, improving the comfort during long-term use. The opening and closing combination of the mask valve group is driven by the human breathing pressure and automatically matches the human breathing rhythm, thereby improving the utilization rate of oxygen and realizing the economical use of oxygen carried at high altitudes.

[0005] The technical solution adopted by the present invention:

[0006] A high-altitude oxygen supply and oxygen-saving respirator includes an oxygen storage cotton protective cover. One side of the oxygen storage cotton protective cover is movably hinged to one side of the oxygen storage cotton base, and the other side of the oxygen storage cotton protective cover is clamped to the other side of the oxygen storage cotton base through a press lock; an oxygen storage cotton is installed between the oxygen storage cotton base and the oxygen storage cotton protective cover; an inhalation valve seat is installed in the middle of the oxygen storage cotton base, and the oxygen mask body is fixedly connected to the oxygen storage cotton base through the inhalation valve seat, and a normally closed negative pressure one-way inhalation valve is installed on the inhalation valve seat; an exhalation valve seat is installed below the oxygen mask body, and a normally closed positive pressure one-way exhalation valve is installed on the exhalation valve seat.

[0007] The high-altitude oxygen supply and oxygen-saving respirator is characterized in that an air inlet pipe for the storage cotton is installed on one side above the oxygen mask body, an oxygen inlet pipe is installed on the other side above the oxygen mask body, and an oxygen coil is installed inside the oxygen mask body.

[0008] One end of the air inlet pipe for the storage cotton is communicated with the oxygen mask body, and the other end of the air inlet pipe for the storage cotton is communicated with the oxygen storage cotton on the oxygen storage cotton base.

[0009] One end of the oxygen inlet pipe is communicated with the oxygen mask body, and the other end of the oxygen inlet pipe is connected to a portable liquid oxygen storage and supply device.

[0010] The oxygen storage cotton includes electrostatic cotton, melt-blown non-woven fabric, and carbon fiber layer; the melt-blown non-woven fabric is placed between the electrostatic cotton and the carbon fiber layer.

[0011] The static cotton faces the wearer's face.

[0012] The static electricity environment generated by the static cotton adsorbs oxygen. The activated carbon fibers of the carbon fiber layer store the oxygen adsorbed by the static cotton. The melt-blown non-woven fabric has a ventilation resistance to prevent oxygen from leaking out.

[0013] An oxygen coil pipe is installed inside the oxygen mask body. One input hole of the oxygen coil pipe is connected to the oxygen inlet pipe, and the other output hole of the oxygen coil pipe is connected to the storage cotton inlet pipe; an air intake hole is provided in the middle of the oxygen mask body and is hermetically fixed to the air intake valve seat; an air exhalation hole is provided in the middle and lower part of the oxygen mask body and is hermetically fixed to the air exhalation valve seat.

[0014] A duckbill type one-way drainage valve is also installed below the oxygen mask body.

[0015] Headband connecting straps are also installed on both sides of the oxygen storage cotton base.

[0016] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0017] (1) The high-altitude oxygen supply and oxygen-saving respirator has the oxygen storage function of the oxygen storage cotton. An oxygen storage cotton is installed between the oxygen storage cotton base and the oxygen storage cotton protection cover, and the oxygen input from the storage cotton inlet pipe can be effectively stored. When the human body is in the exhalation state, the space between the wearer's face and the respirator is at positive pressure, and the normally closed negative pressure one-way intake valves on the intake valve seat are all in the closed state. At this time, the oxygen continuously supplied by the portable liquid oxygen storage and supply device flows through the oxygen inlet pipe, the oxygen coil pipe and the storage cotton inlet pipe, and then flows to the oxygen storage cotton to be adsorbed and retained, so as to accumulate oxygen in the mask, avoid leakage and loss, and improve the oxygen utilization rate.

[0018] (2) The high-altitude oxygen supply and oxygen-saving respirator has a hermetic structure design. The oxygen mask body is made of silica gel material and can fit with the wearer's face. When inhaling, a negative pressure is formed in the space between the wearer's face and the respirator to further tighten; the exhalation valve, the intake valve and the drainage valve are hermetically fixed to the valve seat to improve the hermeticity of the mask body itself; the valve group is designed for one-way flow to ensure the consistency of the gas flow direction in the mask during the breathing state switching and the effectiveness of the oxygen accumulation in the mask, and avoid the problem of oxygen waste caused by oxygen leakage from the gaps between the mask and the wearer's face and between the mask valve body and the valve seat.

[0019] (3) The high-altitude oxygen supply and oxygen-saving respirator has the functions of reducing the oxygen supply temperature difference and dehumidifying inside the face mask. When used in conjunction with a portable liquid oxygen storage and supply device, since the oxygen vaporized from the liquid oxygen is at a relatively low temperature, by arranging an oxygen coil inside the main body of the oxygen face mask, the low-temperature oxygen can flow through the oxygen coil, increasing the heat exchange area and duration with the hot and humid gas exhaled by the human body inside the face mask, thereby reducing the oxygen supply temperature difference. At the same time, the relatively low surface temperature of the oxygen coil can accelerate the condensation of water vapor inside the face mask, which is beneficial to reducing the humidity inside the face mask, thus improving the comfort of the high-altitude oxygen supply and oxygen-saving respirator during long-term use. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a front view structural schematic diagram of the high-altitude oxygen supply and oxygen-saving respirator disclosed by the present invention;

[0022] Figure 2 It is a left view structural schematic diagram of the high-altitude oxygen supply and oxygen-saving respirator disclosed by the present invention;

[0023] Figure 3 It is a top view structural schematic diagram of the high-altitude oxygen supply and oxygen-saving respirator disclosed by the present invention;

[0024] Figure 4 It is a bottom view structural schematic diagram of the high-altitude oxygen supply and oxygen-saving respirator disclosed by the present invention;

[0025] Figure 5 It is a rear view structural schematic diagram of the high-altitude oxygen supply and oxygen-saving respirator disclosed by the present invention;

[0026] Figure 6 It is a structural schematic diagram of the oxygen coil disclosed by the present invention;

[0027] Figure 7 It is an exploded structural schematic diagram of the high-altitude oxygen supply and oxygen-saving respirator disclosed by the present invention;

[0028] Figure 8 It is a structural schematic diagram of the oxygen storage cotton disclosed by the present invention;

[0029] Figure 9 It is a structural schematic diagram after the oxygen storage cotton protective cover is opened;

[0030] Figure 10 It is a structural schematic diagram ready to load the oxygen storage cotton;

[0031] Figure 11 It is a schematic structural diagram of the oxygen storage cotton of the present invention installed in the oxygen storage cotton base;

[0032] Figure 12 It is a schematic structural diagram after the oxygen storage cotton protective cover of the present invention is covered;

[0033] Figure 13 It is a schematic structural diagram of the duckbill type one-way drainage valve of the present invention.

[0034] In the figure: 1. Oxygen storage cotton protective cover; 2. Oxygen storage cotton; 201. Electrostatic cotton, 202. Meltblown non-woven fabric, 203. Carbon fiber layer; 3. Oxygen storage cotton base; 4. Headband connecting band; 5. Storage cotton intake pipe; 6. Oxygen mask main body; 7. Oxygen intake pipe; 8. Oxygen coil pipe; 9. Suction valve seat; 10. Normally closed negative pressure one-way suction valve; 11. Normally closed positive pressure one-way exhalation valve; 12. Exhalation valve seat; 13. Duckbill type one-way drainage valve. Detailed implementation manners

[0035] 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0036] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0038] Such as Figures 1 to 13As shown in the figure, a high-altitude oxygen supply and oxygen-saving breathing apparatus provided by the present invention is composed of an oxygen storage cotton protective cover 1, oxygen storage cotton 2, an oxygen storage cotton base 3, a headband connecting belt 4, a storage cotton intake pipe 5, an oxygen mask body 6, an oxygen intake pipe 7, an oxygen coil 8, an inhalation valve seat 9, a normally closed negative pressure one-way inhalation valve 10, a normally closed positive pressure one-way exhalation valve 11, an exhalation valve seat 12, and a duckbill one-way drain valve 13. One side of the oxygen storage cotton protective cover 1 is movably hinged to one side of the oxygen storage cotton base 3, and the other side of the oxygen storage cotton protective cover 1 is clamped to the other side of the oxygen storage cotton base 3 through a push lock. Headband connecting belts 4 are installed on both sides of the oxygen storage cotton base 3, and the function of the headband connecting belts 4 is to be fixed to the head or connected to a safety helmet. The inhalation valve seat 9 is installed in the middle of the oxygen storage cotton base 3, and the oxygen mask body 6 is fixedly connected to the oxygen storage cotton base 3 through the inhalation valve seat 9, and the normally closed negative pressure one-way inhalation valve 10 is installed on the inhalation valve seat 9. The exhalation valve seat 12 is installed below the inhalation valve seat 9 of the oxygen storage cotton base 3, and the normally closed positive pressure one-way exhalation valve 11 is installed on the exhalation valve seat 12. The oxygen storage cotton 2 is installed between the oxygen storage cotton base 3 and the oxygen storage cotton protective cover 1, and the oxygen storage cotton 2 is composed of electrostatic cotton 201, melt-blown non-woven fabric 202, and a carbon fiber layer 203. The melt-blown non-woven fabric 202 is placed between the electrostatic cotton 201 and the carbon fiber layer 203; when the oxygen storage cotton 2 is placed on the oxygen storage cotton base 3, the electrostatic cotton 201 layer faces the wearer's face.

[0039] An oxygen coil 8 is installed inside the oxygen mask body 6. One end of the oxygen coil 8 is an oxygen input hole, located on one side above its outer side, and the other end of the oxygen coil 8 is an oxygen output hole, located on the other side above its outer side. The oxygen input hole on one side above the outer side of the oxygen mask body 6 is equipped with an oxygen intake pipe 7. One end of the oxygen intake pipe 7 is connected to the oxygen coil 8, and the other end of the oxygen intake pipe 7 is connected to a portable liquid oxygen storage and supply device. The oxygen output hole on the other side above the outer side of the oxygen mask body 6 is equipped with a storage cotton intake pipe 5. One end of the storage cotton intake pipe 5 is connected to the oxygen coil 8, and the other end of the storage cotton intake pipe 5 communicates with the oxygen storage cotton 2 on the oxygen storage cotton base 3. The inhalation valve seat 9 is installed in the middle of the oxygen mask body 6. The exhalation valve seat 12 is installed in the middle and lower part of the oxygen mask body 6. A duckbill one-way drain valve 13 is installed below the oxygen mask body 6, which is used to drain the condensed water generated by human breathing in the mask.

[0040] The working principle of this high-altitude oxygen supply and oxygen-saving respirator is as follows: After wearing the respirator, a sealed space is formed between the main body 6 of the oxygen mask and the wearer's face. When the portable liquid oxygen storage and supply device is turned on, it supplies oxygen continuously at a low flow rate. The oxygen is transported through the air inlet pipe 7 to the inside of the main body 6 of the oxygen mask. After flowing through the oxygen coil 8, it then flows through the storage cotton air inlet pipe 5 to the oxygen storage cotton 2 and is adsorbed and retained, causing oxygen to accumulate inside the mask. When the low-temperature oxygen flows through the oxygen coil 8, it gets heated up, and at the same time, the low temperature conducted to the outer wall of the oxygen coil 8 causes the water vapor exhaled by the human body inside the mask to condense quickly, enhancing the comfort of long-term use of the mask. The static electricity generated by the static cotton 201 of the oxygen storage cotton 2 can adsorb oxygen. The developed microporous structure of the activated carbon fibers in the carbon fiber layer 203 stores the adsorbed oxygen. The melt-blown non-woven fabric 202 has a certain air permeability resistance, thus playing a role in preventing oxygen from overflowing.

[0041] The working process of this high-altitude oxygen supply and oxygen-saving respirator is as follows:

[0042] During inhalation, since a sealed space is formed by the close fit between the main body 6 of the oxygen mask of the respirator and the wearer's face, the space between the wearer's face and the respirator is in a negative pressure state. At this time, the normally closed negative pressure one-way inhalation valve 10 opens, and the outside air enters the mask through the oxygen storage cotton 2. The oxygen adsorbed and retained on the oxygen storage cotton 2 is released by the purging of the outside air and enters the sealed space formed by the close fit between the main body 6 of the oxygen mask and the wearer's face, mixing to form oxygen-rich air for oxygen supply, improving the high-altitude hypoxia symptoms of the wearer. Since the respirator is in a sealed state with the face, the oxygen supplied by the portable liquid oxygen storage and supply device is utilized more fully. Therefore, the oxygen supply flow rate can be appropriately reduced, thus saving the oxygen consumption and extending the service life of the portable liquid oxygen storage and supply device.

[0043] During exhalation, the space between the wearer's face and the respirator is in a positive pressure state. The normally closed negative pressure one-way inhalation valve 10 closes, and at the same time, the continuous oxygen supply of the portable liquid oxygen storage and supply device accumulates on the oxygen storage cotton 2. The normally closed positive pressure one-way exhalation valve 11 opens to discharge the gas exhaled by the wearer. After discharging, the normally closed positive pressure one-way exhalation valve 11 returns to the closed state. There is a duckbill one-way drain valve 13 below the respirator, and condensed water will continuously form on the outer wall of the oxygen coil 8 inside the main body 6 of the oxygen mask. Due to its own gravity, the condensed water gathers at the duckbill one-way drain valve 13. The duckbill one-way drain valve 13 opens, thus discharging the condensed water inside the respirator. After discharging, the duckbill one-way drain valve 13 returns to the closed state, which can prevent water from accumulating inside the respirator and improve the comfort of the wearer.

[0044] When used on the plateau, the plateau oxygen supply and oxygen-saving breathing apparatus realizes the oxygen accumulation and supply in the apparatus with low-flow oxygen supply. That is, when the human body exhales, the oxygen mask main body and the oxygen storage cotton store oxygen. Through the certain airtightness of the mask itself, the leakage of oxygen is controlled. When the human body inhales, a negative pressure is formed in the space between the wearer's face and the breathing apparatus. The oxygen mask main body supplies oxygen, that is, the oxygen adsorbed and retained in the oxygen storage cotton is purged and released by the air inhaled into the mask, and is supplied simultaneously after being mixed with the air. An oxygen coil is installed inside the oxygen mask main body. When the low-temperature oxygen flows in the pipe, it exchanges heat with the humid and hot gas exhaled by the human body inside the mask, so that the low-temperature oxygen flowing in the pipe is heated up, and at the same time, the water vapor inside the mask condenses on the outer wall of the oxygen coil, improving the comfort during long-term use. The opening and closing combination of the mask valve group is driven by the breathing pressure of the human body and automatically matches the breathing rhythm of the human body, so as to improve the utilization rate of oxygen and realize the economical use of oxygen carried on the plateau.

[0045] The above is only the preferred embodiment of the present invention. The above examples do not impose any formal restrictions on the essence of the present invention. Any simple modification or deformation made by those of ordinary skill in the art to the above specific embodiments according to the technical essence of the present invention after reading this specification, and any equivalent embodiments that may be changed or modified by using the technical content disclosed above into equivalent variations still fall within the scope of the technical solution of the present invention without departing from the essence and scope of the present invention.

[0046] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed claim.

[0047] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-altitude oxygen supply and oxygen-saving breathing apparatus, characterized in that, It includes an oxygen storage cotton protective cover (1), one side of the oxygen storage cotton protective cover (1) is movably hinged to one side of the oxygen storage cotton base (3), and the other side of the oxygen storage cotton protective cover (1) is fastened to the other side of the oxygen storage cotton base (3) by a press lock; an oxygen storage cotton (2) is installed between the oxygen storage cotton base (3) and the oxygen storage cotton protective cover (1); a suction valve seat (9) is installed in the middle of the oxygen storage cotton base (3), and the oxygen mask body (6) is fixedly connected to the oxygen storage cotton base (3) through the suction valve seat (9), and a normally closed negative pressure one-way suction valve (10) is installed on the suction valve seat (9); an exhalation valve seat (12) is installed below the oxygen mask body (6), and a normally closed positive pressure one-way exhalation valve (11) is installed on the exhalation valve seat (12); Among them, the oxygen storage cotton (2) includes static electricity cotton (201), melt-blown non-woven fabric (202), and carbon fiber layer (203); the melt-blown non-woven fabric (202) is placed between the static electricity cotton (201) and the carbon fiber layer (203); Among them, the static electricity environment generated by the static electricity cotton (201) adsorbs oxygen, the activated carbon fibers of the carbon fiber layer (203) store the oxygen adsorbed by the static electricity cotton (201), and the melt-blown non-woven fabric (202) has a ventilation resistance to prevent oxygen from overflowing.

2. The high-altitude oxygen supply and oxygen-saving breathing apparatus according to claim 1, wherein One side above the oxygen mask body (6) is provided with a storage cotton inlet pipe (5), the other side above the oxygen mask body (6) is provided with an oxygen inlet pipe (7), and an oxygen coiled pipe (8) is installed inside the oxygen mask body (6).

3. The high-altitude oxygen supply and oxygen-saving breathing apparatus according to claim 2, wherein One end of the storage cotton inlet pipe (5) communicates with the oxygen mask body (6), and the other end of the storage cotton inlet pipe (5) communicates with the oxygen storage cotton (2) on the oxygen storage cotton base (3).

4. The high-altitude oxygen supply and oxygen-saving respirator according to claim 2, characterized in that, One end of the oxygen inlet pipe (7) communicates with the oxygen mask body (6), and the other end of the oxygen inlet pipe (7) is connected to a portable liquid oxygen storage and supply device.

5. The high-altitude oxygen supply and oxygen-saving breathing apparatus according to claim 1, characterized in that, The static electricity cotton (201) faces the wearer's face.

6. The high-altitude oxygen supply and oxygen-saving breathing apparatus according to claim 1, characterized in that, An oxygen coiled pipe (8) is installed inside the oxygen mask body (6), one input hole at one end of the oxygen coiled pipe (8) is connected to the oxygen inlet pipe (7), and the output hole at the other end of the oxygen coiled pipe (8) is connected to the storage cotton inlet pipe (5); an air suction hole is provided in the middle of the oxygen mask body (6) and is hermetically fixed to the suction valve seat (9); an air exhalation hole is provided in the middle and lower part of the oxygen mask body (6) and is hermetically fixed to the exhalation valve seat (12).

7. The high-altitude oxygen supply and oxygen-saving breathing apparatus according to claim 1, characterized in that A duckbill type one-way drain valve (13) is also installed below the oxygen mask body (6).

8. The high-altitude oxygen supply and oxygen-saving respirator according to claim 1, characterized in that Headband connecting straps (4) are also installed on both sides of the oxygen storage cotton base (3).

Images