An air breathing machine and method of oxygen supply thereof

Abstract

The application discloses an air breathing machine and an oxygen supply method thereof, and belongs to the technical field of breathing machines. The air breathing machine comprises an air filter, an oxygen generator, an oxygen cylinder and an oxygen concentration adjusting and mixing tank. The air filter is connected with one of the three openings of a first three-way pipe through a pressurizing machine. The other two openings of the first three-way pipe are connected with the oxygen generator and the oxygen concentration adjusting and mixing tank respectively. The oxygen generator uses filtered air to generate oxygen. The outlet of the oxygen generator is connected with the oxygen concentration adjusting and mixing tank through a first flowmeter. The oxygen cylinder is connected with the oxygen concentration adjusting and mixing tank through a second flowmeter. The outlet of the oxygen concentration adjusting and mixing tank is connected with an air suction opening through an oxygen concentration sensor. The first flowmeter, the second flowmeter and the oxygen concentration sensor are electrically connected with a controller. The oxygen concentration of the oxygen discharged from the air suction opening is equivalent to that in natural air. The application can output air with an oxygen concentration equivalent to that in natural air to the air suction opening, and can continuously provide air meeting the breathing demand for a user.

Description

Technical Field

[0001] This invention relates to the field of ventilator technology, and in particular to an air ventilator and its oxygen supply method. Background Technology

[0002] Oxygen, like water and food, is an important source of energy for sustaining life. In natural air, oxygen and nitrogen account for 21% and 78% respectively. The higher the altitude, the lower the oxygen content. For every 1,000 meters increase in altitude, oxygen decreases by 10%.

[0003] In high-altitude areas, the biggest problem is altitude sickness, the most direct cause of which is hypoxia. Currently, the main solutions for hypoxia on plateaus include fixed oxygen stations, which are location-limited, lack mobility, and cannot meet the oxygen needs of personnel traveling long distances. Alternatively, oxygen cylinders or bags can be used for easy transport, providing oxygen for a certain period, but the supply is low and the usage time is short. Another option is small oxygen generators, but due to the low oxygen content in the natural air at high altitudes, these generators cannot produce enough oxygen to meet the needs of conventional pure oxygen supply. Therefore, none of these methods allow people to breathe normally for extended periods at high altitudes, especially for officers and soldiers stationed year-round on the border. Due to mission requirements, they frequently patrol the border and respond to emergencies; hypoxia at high altitudes significantly reduces their combat effectiveness.

[0004] During mining operations, when an accident occurs underground, personnel are often unable to evacuate in time. Currently, underground workers are mainly equipped with 40-minute compressed oxygen self-rescue devices. This solution can only provide oxygen for a limited time and cannot meet the long-term needs of trapped personnel, resulting in lost time waiting for rescue.

[0005] Existing patent literature, such as Chinese Patent CN103626132A, discloses a portable oxygen concentrator suitable for high-altitude areas. Based on a traditional oxygen concentrator, it adds a breathing pressure detection device, a real-time oxygen concentration detection device for high-altitude environments, an output oxygen detection device, and an intelligent judgment and control circuit. The microcontroller in the intelligent judgment and control circuit judges and processes the output signals from the aforementioned detection devices according to a pre-programmed software program, and outputs control signals in real time to adjust the output oxygen flow rate, forming a pulse oxygen supply mode. Simultaneously, it can adjust the duty cycle of the compressor drive motor power supply to regulate the compressed air flow rate, thereby regulating the oxygen output flow rate. The output control signal can also promptly issue an audible and visual alarm. This solution generates oxygen using outside air, which can meet oxygen needs if air is plentiful. However, in high-altitude areas where air or oxygen is scarce, the oxygen production capacity is clearly insufficient.

[0006] For example, Chinese patent CN212127514U discloses an integrated miniature portable oxygen concentrator, including a computer controller, an oil-free air compressor, a first oxygen-generating molecular sieve, a second oxygen-generating molecular sieve, an air collector, a breathing controller, and an air intake filter. The first oxygen-generating molecular sieve contains a first pressure sensor, and the second oxygen-generating molecular sieve contains a second pressure sensor. The oil-free air compressor is driven by a hand crank and a gear set. This solution allows the air compressor of the miniature portable oxygen concentrator to operate normally in areas without electricity or where charging is not possible, primarily addressing the power supply issue but not changing the oxygen supply method; therefore, the oxygen production capacity still falls short of demand.

[0007] In summary, current technologies primarily rely on oxygen generators or oxygen bags / bottles to provide pure oxygen to individuals in order to adapt to hypoxic environments. However, prolonged inhalation of pure oxygen can easily lead to oxygen poisoning. Therefore, existing equipment is not suitable for long-term use. Consequently, how to provide oxygen generators that meet individual oxygen needs in environments with thin air or lack of oxygen is a real technical problem that needs to be addressed and improved. Summary of the Invention

[0008] The purpose of this invention is to provide an air respirator and its oxygen supply method to solve the problems existing in the prior art. By mixing the oxygen obtained by the oxygen generator and the air filtered by the air purifier in the oxygen concentration adjustment mixing tank, and supplementing the oxygen in the oxygen cylinder under special circumstances, air with an oxygen concentration equivalent to that of natural air can be output to the air intake port, thereby continuously providing air that meets the breathing needs of the user.

[0009] To achieve the above objectives, the present invention provides the following solution:

[0010] This invention provides an air respirator, comprising an air purifier, an oxygen generator, an oxygen cylinder, and an oxygen concentration adjustment mixing tank. The air purifier is connected to one port of a first three-way pipe via a compressor. The other two ports of the first three-way pipe are respectively connected to the oxygen generator and the oxygen concentration adjustment mixing tank. The oxygen generator produces oxygen using air filtered by the air purifier. The outlet of the oxygen generator is connected to the oxygen concentration adjustment mixing tank via a first flow meter. The oxygen cylinder is connected to the oxygen concentration adjustment mixing tank via a second flow meter. The outlet of the oxygen concentration adjustment mixing tank is connected to an air intake port via an oxygen concentration sensor. The first flow meter, the second flow meter, and the oxygen concentration sensor are electrically connected to a controller. The oxygen concentration discharged from the air intake port is equivalent to the oxygen concentration in natural air.

[0011] Preferably, the air purifier includes a desiccant storage tank, an activated carbon storage tank, and a filter membrane dustproof tank arranged sequentially according to the airflow order; the pressurizer is a reciprocating diaphragm pressurizer, and a cooler is provided between the reciprocating diaphragm pressurizer and the first three-way pipe.

[0012] Preferably, a first two-position three-way solenoid valve is provided between the first three-way pipe and the oxygen concentration adjustment mixing tank. The first two-position three-way solenoid valve includes a non-toxic air passage and a toxic filtration passage. The non-toxic air passage is connected to the oxygen concentration adjustment mixing tank, and the toxic filtration passage is connected to the oxygen concentration adjustment mixing tank through a toxic filter canister.

[0013] Preferably, the oxygen cylinder is connected to a second two-position three-way solenoid valve via a pressure reducing valve. The second two-position three-way solenoid valve includes a direct oxygen supply passage and an oxygen concentration adjustment passage. The direct oxygen supply passage is connected to the air intake port, and the oxygen concentration adjustment passage is connected to the second flow meter.

[0014] Preferably, the oxygen generator includes a second three-way pipe and two oxygen-nitrogen separators. Each oxygen-nitrogen separator includes an inlet and an outlet. The inlet is used for air intake during the oxygen generation stage and for waste gas outlet during the backflushing stage. The outlet is used for oxygen outlet during the oxygen generation stage and for oxygen intake during the backflushing stage. The two outlets are respectively connected to two ports of the second three-way pipe, and the other port of the second three-way pipe is connected to the first flow meter. The generator also includes a two-position five-way solenoid valve, which includes two oxygen generation passages and a second oxygen generation passage with opposite circuits. In the first oxygen generation passage, the two inlets are respectively connected to the first three-way pipe and the first waste gas outlet. In the second oxygen generation passage, the two inlets are respectively connected to the second waste gas outlet and the first three-way pipe.

[0015] Preferably, the oxygen-nitrogen separator adopts a spiral structure, which forms a spiral partition for air circulation. The central opening of the spiral partition serves as the oxygen outlet, and the tangential opening on the outer diameter side of the spiral partition serves as the inlet.

[0016] Preferably, the device includes a frame, a humidification bottle is disposed between the air intake and the oxygen concentration sensor, the top of the humidification bottle is connected to the frame via a universal joint, and a counterweight is disposed at the bottom of the humidification bottle to keep the humidification bottle in a vertical position.

[0017] Preferably, the frame is fitted with a shell, which includes an outer layer of cowhide and an inner layer of canvas. An electric heating device is provided on the inner side of the canvas to maintain the environment inside the shell at a suitable working temperature. The air purifier, the oxygen generator, the oxygen cylinder, and the oxygen concentration adjustment mixing tank are all installed inside the shell.

[0018] Preferably, the device includes a battery pack for supplying power to various electrical devices, the battery pack being connected to an external charging port and a solar charging port; the oxygen cylinder is made of carbon fiber, the battery pack uses lithium titanate batteries, and the remaining materials are lightweight materials.

[0019] The present invention also provides an oxygen supply method, using an air respirator as described above, comprising the following:

[0020] Start the compressor to draw air into the air breathing machine from the outside. After the air is filtered by the air purifier, it is pressurized by the compressor. The pressurized air is divided into two paths through the first three-way pipe. One path enters the oxygen concentration adjustment mixing tank for oxygen concentration adjustment, and the other path enters the oxygen generator.

[0021] The oxygen separated from the oxygen generator enters the oxygen concentration adjustment mixing tank after the flow rate is adjusted by the first flow meter to participate in the oxygen concentration adjustment;

[0022] If the oxygen concentration in the oxygen concentration adjusting mixing tank does not reach the oxygen concentration in natural air, the second flow meter is controlled to supplement a certain amount of pure oxygen from the oxygen cylinder into the oxygen concentration adjusting mixing tank.

[0023] Once the oxygen concentration is adjusted to the appropriate level, the oxygen is drawn into the air by the user through the air intake port after passing through the oxygen concentration sensor from the outlet of the oxygen concentration adjustment mixing tank.

[0024] The present invention achieves the following technical effects compared to the prior art:

[0025] This invention mixes oxygen from an oxygen generator with air filtered by an air purifier in an oxygen concentration adjustment mixing tank. In special circumstances, oxygen is added from the oxygen cylinder to supply air with an oxygen concentration equivalent to natural air, thus continuously providing the user with air that meets their breathing needs. An oxygen concentration sensor feeds a signal back to the controller. If the oxygen concentration is 21%, only filtered air is supplied. If the oxygen concentration is below 21% (for example, at altitudes above 4000 meters, oxygen is around 16%, and above 5000 meters, it is around 12%), oxygen can be supplemented through the oxygen generator. When increased physical activity leads to increased oxygen consumption or the oxygen generator cannot meet the demand, the oxygen concentration sensor feeds a signal, controlling the first and second flow meters to replenish the oxygen concentration mixing tank with pure oxygen from the oxygen cylinder, maintaining the oxygen concentration at 21%.

[0026] Other technical solutions included in this invention can also achieve the following technical effects:

[0027] (1) The oxygen-nitrogen separator of the present invention adopts a spiral structure, which can form a spiral barrier for air circulation, increase the air running distance, improve adsorption efficiency, and reduce the external volume. Unlike traditional oxygen molecular sieves, it can use spiral technology to improve the separation efficiency of oxygen and nitrogen in natural air, accelerate the separation speed of oxygen molecules, avoid energy waste, and thus extend the battery pack usage time.

[0028] (2) In this invention, outside air can enter the oxygen concentration adjustment mixing tank through a non-toxic air passage or a toxic filtration passage. In peacetime, a non-toxic air passage can be used to facilitate air circulation (the gas filter tank will increase the resistance to air circulation to a certain extent) and reduce energy loss. In wartime, if the enemy releases poison gas, a toxic filtration passage can be used to filter the air entering the oxygen concentration adjustment mixing tank through the gas filter tank, ensuring that personnel will not be poisoned while breathing normally, thus avoiding affecting combat effectiveness.

[0029] (3) The press of the present invention adopts a reciprocating diaphragm press. The reciprocating diaphragm press has the advantages of low power, low power consumption, low cost and low noise. The cooler can cool the air after it has been pressurized by the press and keep it within the temperature range suitable for the human body. The reciprocating diaphragm press uses two methods to supplement oxygen: one is to directly supply the filtered air, and the other is to supplement the oxygen produced by the oxygen generator. Most of the supplemented oxygen is oxygen produced by the oxygen generator, which can ensure that the oxygen concentration is 21%.

[0030] (4) The oxygen cylinder of the present invention can be connected to the air intake port through the direct oxygen supply channel or to the oxygen concentration adjustment mixing tank through the oxygen concentration adjustment channel. In special cases, the oxygen consumption is increased due to altitudes above 5000 meters or training. At this time, the pressure reducing valve of the oxygen cylinder is open. The controller adjusts the second flow meter to continue to supply oxygen to the oxygen concentration adjustment mixing tank, that is, oxygen is supplemented through the oxygen cylinder, which can meet the oxygen concentration of 21% in the air at the air intake port.

[0031] (5) The top of the humidification bottle of the present invention is connected to the frame through a universal joint, and a counterweight is provided at the bottom of the humidification bottle. Through the cooperation of the counterweight and the universal joint, the humidification bottle can always be kept in a vertical position to avoid backflow of liquid water in the humidification bottle and affect breathing.

[0032] (6) The battery pack of the present invention is connected to a solar charging port, which can be charged by a solar panel, thereby ensuring that soldiers can use the air breathing machine of the present invention for a long time during daily training to supplement oxygen, which greatly improves the soldiers' combat capability in plateau areas.

[0033] (7) The oxygen cylinder of this invention is made of carbon fiber, which can reduce the weight of the oxygen cylinder and improve the convenience of carrying it by individuals. At the same time, it reduces thermal conductivity and avoids the oxygen temperature from affecting human breathing in cold regions. The battery pack uses lithium titanate batteries, which avoids the flammable characteristics of lithium batteries. At the same time, the stability and service life of the battery pack are greatly improved. The other materials are selected as lightweight materials, which further reduces the overall weight of the ventilator. It is estimated that the total weight of the ventilator of this invention can be controlled at 3.5kg, which is convenient for individuals to carry.

[0034] (8) The housing of the present invention includes an outer layer of cowhide and an inner layer of canvas. The cowhide has a certain toughness and wear resistance, and is also lightweight. The canvas is wear-resistant. An electric heating device is provided on the inner side of the canvas. The electric heating device can keep the environment inside the housing at a suitable working temperature, for example, controlled at 10°C. The suitable temperature can ensure that the battery pack and electronic components can be used normally in cold regions. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the air respirator of the present invention;

[0037] Figure 2 This is a front view of the air respirator of the present invention;

[0038] Figure 3 This is a top view of the air respirator of the present invention;

[0039] Figure 4 This is a left view of the air respirator of the present invention;

[0040] Figure 5 for Figure 4 View of the back side of A-axis;

[0041] Figure 6 for Figure 4 Sectional view of AA in the middle;

[0042] Figure 7 for Figure 4 Cross-sectional view of the middle section (BB);

[0043] Figure 8 for Figure 4 CC section view;

[0044] Figure 9 for Figure 4 Cross-sectional view of DD in the middle;

[0045] Figure 10 The axial side of the air respirator of the present invention Figure 1 ;

[0046] Figure 11 The isometric view of the air respirator of this invention Figure 2 ;

[0047] Figure 12 The isometric view of the air respirator of this invention Figure 3 ;

[0048] Figure 13 The isometric view of the air respirator of this invention Figure 4 ;

[0049] Figure 14 This invention relates to a heating and temperature control chamber for an air respirator.

[0050] Figure 15 This is the main circuit diagram of the air respirator of the present invention;

[0051] Figure 16 This is a flowchart of the air respirator control process of the present invention;

[0052] Figure 17 This is a flowchart illustrating the operation of the air respirator of the present invention.

[0053] Figure 18 This is a front view of the air respirator mounting bracket of the present invention;

[0054] Figure 19 This is an isometric view of the air respirator mounting bracket of the present invention;

[0055] The components include: 1. Electric heating device; 2. Universal joint; 3. Vent cover; 4. Oxygen inhalation tube; 5. Humidification bottle; 6. Air purifier; 7. Reciprocating diaphragm compressor; 8. Left tank of oxygen-nitrogen separator; 9. Right tank of oxygen-nitrogen separator; 10. Oxygen concentration adjustment mixing tank; 11. Gas filter canister; 12. Oxygen cylinder; 13. Quick-connect fitting; 14. Pressure reducing valve; 15. Battery pack; 16. PIC microcontroller; 17. Control device; 19. Pure oxygen connection passage for humidification bottle; 20. Air inlet circuit for reciprocating diaphragm compressor; 21. 21. Cooler outlet hose; 22. Cooler; 23. Reciprocating diaphragm compressor outlet passage; 24. Two-position five-way solenoid valve; 25. Second exhaust outlet; 26. First exhaust outlet; 27. Oxygen concentration sensor vent base; 28. Quick connector; 29. ​​First two-position three-way solenoid valve; 30. First two-position three-way solenoid valve inlet passage; 31. First three-way pipe; 32. Two-position five-way solenoid valve inlet passage; 33. Oxygen concentration adjusting mixing tank inlet passage; 34. First flow meter; 35. Oxygen-nitrogen separator. 36. Second three-way pipe; 37. Top cover; 38. Oxygen concentration adjustment mixing tank outlet passage; 39. Oxygen concentration sensor; 40. Humidification bottle inlet passage; 41. Second two-position three-way solenoid valve; 42. First pure oxygen inlet connection pipe; 43. Second flow meter; 44. Second flow meter inlet connection pipe; 45. Second pure oxygen inlet connection pipe; 46. Housing; 47. Insulation heating wire; 48. Cover; 49. Desiccant storage tank; 50. Activated carbon storage tank; 51. Filter membrane dustproof tank; 5 2. External charging port; 53. Solar charging port; 54. Alarm indicator light; 55. Display panel; 56. Alarm buzzer; 57. Counterweight; 58. Oxygen tubing interface; 59. Humidifier bottle holder; 60. Cooler holder; 61. Air purifier holder; 62. Reciprocating diaphragm compressor clamp; 63. Oxygen-nitrogen separator base; 64. Oxygen-nitrogen separator clamp; 65. Flow meter clamp; 66. Battery pack clamp; 67. Second / second / three-way solenoid valve holder; 68. Oxygen cylinder holder. Detailed Implementation

[0056] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0057] The purpose of this invention is to provide an air respirator and its oxygen supply method to solve the problems existing in the prior art. By mixing the oxygen obtained by the oxygen generator and the air filtered by the air purifier in the oxygen concentration adjustment mixing tank, and supplementing the oxygen in the oxygen cylinder in special circumstances, air with an oxygen concentration equivalent to that of natural air can be output to the air intake port, thereby continuously providing air that meets the breathing needs of the user.

[0058] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0059] like Figures 1-18As shown, this invention provides an air respirator, including an air filter 6, an oxygen generator, an oxygen cylinder 12, and an oxygen concentration adjustment mixing tank 10. The air filter 6 is used to filter dust and impurities in natural air or achieve other filtration effects, achieving air quality suitable for oxygen generation by the oxygen generator and meeting breathing needs. Therefore, any existing air purification device capable of achieving the above functions can be used. The air filter 6 is connected to one port of a first three-way pipe 31 via a compressor. The compressor has a suction-type structure, which can create negative pressure at the outlet side of the air filter 6, i.e., by using the compressor to draw air, allowing outside air to enter the first three-way pipe 31 after being purified by the air filter 6. The other two ports of the first three-way pipe 31 are respectively connected to the oxygen generator and the oxygen concentration adjustment mixing tank 10. On the one hand, it provides the air required for oxygen generation to the oxygen generator; on the other hand, it also supplements the oxygen generated by the oxygen generator into the oxygen concentration adjustment mixing tank 10 to adjust the oxygen concentration and output air with an oxygen concentration of 21%. The oxygen generator used in this invention can generate oxygen using air filtered by the air purifier 6, for example, by oxygen-nitrogen separation, or by using other existing air-based oxygen generators. The outlet of the oxygen generator is connected to the oxygen concentration adjustment mixing tank 10 via a first flow meter 34. The first flow meter 34 and the oxygen concentration adjustment mixing tank 10 are connected via an oxygen concentration adjustment mixing tank inlet passage 33. The oxygen cylinder 12 is connected to the oxygen concentration adjustment mixing tank 10 via a second flow meter 43. The second flow meter 43 and the oxygen concentration adjustment mixing tank 10 are connected via a first pure oxygen inlet connecting pipe 42. The outlet of the oxygen concentration adjustment mixing tank 10 is connected to the air intake port via an oxygen concentration sensor 39. The oxygen concentration adjustment mixing tank 10 is connected via an oxygen concentration adjustment mixing tank outlet passage 38. An oxygen inhalation tube or similar device can be installed at the air intake port for users to inhale oxygen (oxygen-containing air or pure oxygen). The first flow meter 34, the second flow meter 43, and the oxygen concentration sensor 39 are electrically connected to the controller. The controller can be a PIC microcontroller 16. The program is set through the PIC microcontroller 16 to control the flow rate of the produced oxygen through the first flow meter 34, control the flow rate of pure oxygen supplied by the oxygen cylinder 12 through the second flow meter 43, and obtain the final oxygen concentration through the oxygen concentration sensor 39. The flow rate of the first flow meter 34 or the second flow meter 43 can be adjusted according to the obtained oxygen concentration. Finally, the oxygen concentration discharged from the air intake is equal to the oxygen concentration in natural air, that is, it reaches 21%.Specifically, the oxygen concentration sensor 39 feeds back a signal to the controller (e.g., PIC microcontroller 16). If the oxygen concentration is 21%, only filtered air can be introduced. If the oxygen concentration is lower than 21% (e.g., at altitudes above 4000 meters, the oxygen concentration is around 16%, and at altitudes above 5000 meters, it is around 12%), oxygen can be supplemented by an oxygen concentrator. When an individual's exercise level increases, leading to increased oxygen consumption or the oxygen concentrator cannot meet the demand, the oxygen concentration sensor 39 feeds back a signal to control the first flow meter 34 and the second flow meter 43 to replenish the oxygen cylinder 12 with pure oxygen to the oxygen concentration adjustment mixing tank 10, so that the oxygen concentration is maintained at 21%. This invention mixes oxygen from an oxygen generator with air filtered by an air purifier 6 in an oxygen concentration adjustment mixing tank 10. In special circumstances, oxygen is added from an oxygen cylinder 12. This allows the device to output air with an oxygen concentration equivalent to that of natural air to the air intake. Since the originally inhaled high-altitude air contains oxygen, the amount of oxygen missing in the supplemented air is not large. Therefore, the device can be used for a long time and can continuously provide air that meets the breathing needs of the user. At the same time, since it provides air with an oxygen content of 21%, it can effectively avoid damage to human organs caused by prolonged inhalation of pure oxygen and prevent oxygen poisoning.

[0060] The control process of this invention is as follows:

[0061] The compressor draws in natural air from the air filter 6. The compressor's operation is controlled by the PIC microcontroller 16. The PIC microcontroller 16 receives signals from the oxygen concentration sensor 39 and, based on the pre-set baseline of 21% oxygen content in the natural air, issues commands to adjust the first flow meter 34 and the second flow meter 43 to control the oxygen concentration of the output air. When the oxygen concentration in the natural air is less than 21%, the oxygen generator is turned on. The PIC microcontroller 16 continuously adjusts the oxygen concentration. When the oxygen generator alone cannot provide enough oxygen due to increased physical activity, the PIC microcontroller 16 controls the second two-position three-way solenoid valve 41 to open, and simultaneously controls the second flow meter 43 to output oxygen to the oxygen concentration adjustment mixing tank 10 or directly supply pure oxygen to the air intake.

[0062] Because water is a polar molecule, it is very easy to be adsorbed on the inner wall of the tube or pass through the tube. Therefore, the tube used in the air breathing machine of the present invention has a thicker tube wall and a smooth inner wall surface, and the tube material has strong hydrophobicity.

[0063] The air purifier 6 includes a desiccant tank 49, an activated carbon tank 50, and a filter membrane dustproof tank 51 arranged sequentially according to airflow order. By filtering natural air, the air purifier 6 provides dry, clean air to meet the oxygen generator's oxygenation and respiratory needs. Utilizing the water-absorbing properties of the desiccant in the desiccant tank 49, moisture in the air is fully absorbed, reducing the moisture content of the air entering the device and preventing damage to the oxygen generator.

[0064] The compressor can be a reciprocating diaphragm compressor 7, which has advantages such as low power consumption, low cost, and low noise. The reciprocating diaphragm compressor's inlet circuit 20 is connected to the air filter 6, and its outlet passage 23 is connected to the cooler 22. A cooler 22 is installed between the reciprocating diaphragm compressor 7 and the first three-way pipe 31. The cooler's outlet connecting hose 21 is connected to the first three-way pipe 31. The cooler 22 cools the air pressurized by the compressor, maintaining it within a suitable temperature range for the human body. The cooler 22 can be a double-tube cooler or a finned radiator. The reciprocating diaphragm compressor 7 uses two methods to supplement oxygen to the oxygen concentration adjustment mixing tank 10: one is to directly supply filtered air, and the other is to supplement oxygen produced by an oxygen generator. Most of the supplemented oxygen is produced by the oxygen generator, ensuring that the oxygen concentration at the outlet of the oxygen concentration adjustment mixing tank 10 is 21%.

[0065] A first two-position three-way solenoid valve 29 is installed between the first three-way pipe 31 and the oxygen concentration adjustment mixing tank 10. The air inlet passage 30 of the first two-position three-way solenoid valve is connected to the first three-way pipe 31. The first two-position three-way solenoid valve 29 has two valve positions, which can realize the connection of the non-toxic air passage or the toxic filtration passage. The first two-position three-way solenoid valve 29 can be electrically connected to the PIC microcontroller 16 to realize automatic or manual control switching. The oxygen concentration adjustment mixing tank 10 is provided with a top cover 37 and a gas-proof filter tank 11 at the bottom. The non-toxic air passage is connected to the oxygen concentration adjustment mixing tank 10, and the toxic filtration passage is connected to the oxygen concentration adjustment mixing tank 10 through the gas-proof filter tank 11. That is, outside air can enter the oxygen concentration adjustment mixing tank 10 through the non-toxic air passage or the toxic filtration passage. In peacetime, a non-toxic air passage can be used, which facilitates air circulation (the gas filter canister 11 will increase the resistance to air circulation to some extent) and reduces energy loss. In wartime, if the enemy releases poison gas, a toxic filtration passage can be used. The air entering the oxygen concentration adjustment mixing tank 10 is filtered through the gas filter canister 11. The gas filter canister 11 contains a gas-resistant agent, which can ensure that personnel will not be poisoned while breathing normally. This can effectively prevent personnel from being poisoned in the space where poison gas is released, and avoid affecting combat effectiveness.

[0066] Oxygen cylinder 12 is connected to a second two-position three-way solenoid valve 41 via a pressure reducing valve 14. The pressure reducing valve 14 and the second two-position three-way solenoid valve 41 are connected via a quick-connect fitting 13. The second two-position three-way solenoid valve 41 is connected to a second flow meter 43 via a second flow meter connecting pipe 44. The second two-position three-way solenoid valve 41 has two positions, enabling either a direct oxygen supply path or an oxygen concentration adjustment path. The second two-position three-way solenoid valve 41 can be electrically connected to a PIC microcontroller 16 to achieve automatic or manual control switching. The direct oxygen supply path is connected to the air intake port and connected via a humidification bottle pure oxygen connection path 19, allowing pure oxygen from oxygen cylinder 12 to be directly supplied to the user. The oxygen concentration adjustment path is connected to the second flow meter 43, allowing pure oxygen from oxygen cylinder 12 to be supplied to the oxygen concentration adjustment mixing tank 10. The high-pressure oxygen in oxygen cylinder 12 is reduced in pressure by pressure reducing valve 14, and then selected by the second two-position three-way solenoid valve 41 to supply oxygen alone or to participate in oxygen concentration mixing and adjustment. If supplied alone, the reciprocating diaphragm compressor 7 will be shut off, and the pure oxygen in oxygen cylinder 12 will enter the humidification bottle 5 through the second two-position three-way solenoid valve 41, with the humidified oxygen being directly used by the user. If used to participate in oxygen concentration mixing and adjustment, the pure oxygen in oxygen cylinder 12 will enter the oxygen concentration adjusting mixing tank 10 through the second two-position three-way solenoid valve 41 and the second flow meter 43 to adjust the flow rate. In special circumstances, such as altitudes above 5000 meters or increased oxygen consumption during training, supplemental oxygen can be provided through oxygen cylinder 12 to meet the needs of special working conditions.

[0067] The oxygen generator may include a second three-way pipe 36 and two oxygen-nitrogen separators. The two oxygen-nitrogen separators are structurally identical, differing only in their connection method. The two oxygen-nitrogen separators can be divided into a left oxygen-nitrogen separator tank 8 and a right oxygen-nitrogen separator tank 9. Each oxygen-nitrogen separator includes an inlet and an oxygen outlet, which have different functions at different stages. Specifically, the inlet is used for air intake during the oxygen generation stage and for waste gas exhaust during the backflushing stage; the oxygen outlet is used for oxygen exhaust during the oxygen generation stage and for oxygen intake during the backflushing stage. The oxygen outlets of the left oxygen-nitrogen separator tank 8 and the right oxygen-nitrogen separator tank 9 are respectively connected to two ports of the second three-way pipe 36. The other port of the second three-way pipe 36 is connected to a first flow meter 34 through an oxygen-nitrogen separator outlet connecting pipe 35. It also includes a two-position five-way solenoid valve 24. The inlet passage 32 of the two-position five-way solenoid valve is connected to the first three-way pipe 31. The two-position five-way solenoid valve 24 has two valve positions, which can realize the connection of the first oxygen generation passage or the second oxygen generation passage. The circuits of the first oxygen generation passage and the second oxygen generation passage are opposite. In the first oxygen generation passage, the two inlets are respectively connected to the first three-way pipe 31 and the first exhaust gas outlet 26. In the second oxygen generation passage, the two inlets are respectively connected to the second exhaust gas outlet 25 and the first three-way pipe 31.

[0068] The oxygen generator operates as follows: After being purified by the air filter 6, the air enters the left tank 8 of the oxygen-nitrogen separator. At this time, the two-position five-way solenoid valve 24 is in the position where the first oxygen generation passage is connected. The air enters the left tank 8 of the oxygen-nitrogen separator through the inlet. The right tank 9 of the oxygen-nitrogen separator is connected to the outside atmosphere through the first exhaust outlet 26. The nitrogen in the air is adsorbed by the reagent in the left tank 8 of the oxygen-nitrogen separator, and the oxygen flows out through the second three-way pipe 36. Part of the oxygen flows into the right tank 9 of the oxygen-nitrogen separator through the oxygen outlet to backflush the right tank 9 of the oxygen-nitrogen separator, which is in a desorption state. The desorbed gas (the exhaust gas is nitrogen) is discharged from the first exhaust outlet 26 through the two-position five-way solenoid valve 24, and the other part goes to the first flow meter 34. Before the reagent in the left tank 8 of the oxygen-nitrogen separator reaches the critical state of adsorption saturation (at this time, the oxygen output of the left tank 8 of the oxygen-nitrogen separator decreases, and the oxygen concentration at the air intake port can never meet 21%), the control device 17 reverses the two-position five-way solenoid valve 24. After reversal, the two-position five-way solenoid valve 24 is in the position of connecting the second oxygen generation passage, and the air intake is switched to the right tank 9 of the oxygen-nitrogen separator. The left tank 8 of the oxygen-nitrogen separator is connected to the outside atmosphere through the second exhaust gas outlet 25. Air enters the right tank 9 of the oxygen-nitrogen separator through the inlet. At the same time, a part of the oxygen enters the left tank 8 of the oxygen-nitrogen separator through the oxygen outlet of the left tank 8 of the oxygen-nitrogen separator, depressurizing and desorbing the oxygen-nitrogen separator. The desorbed gas (the exhaust gas is nitrogen) is discharged from the second exhaust gas outlet 25 through the two-position five-way solenoid valve 24. The working process of the right tank 9 of the oxygen-nitrogen separator is exactly the same as that of the left tank 8 of the oxygen-nitrogen separator. The two work alternately to continuously produce oxygen. It should be noted that the criterion for alternating work is that one of the oxygen-nitrogen separators reaches the adsorption saturation critical state. The adsorption saturation critical state is determined by the oxygen concentration sensor 39 after detecting the oxygen concentration at the air intake port. The oxygen concentration sensor 39 makes the judgment based on whether the oxygen concentration at the air intake port is consistently below 21%.

[0069] The oxygen-nitrogen separator can adopt a spiral structure, which forms a spiral barrier for airflow. This spiral barrier has a central opening at the center of the spiral and a tangential opening on the outer diameter side at the edge of the spiral. The central opening serves as the oxygen outlet, and the tangential opening on the outer diameter side serves as the inlet. This spiral structure increases the airflow distance, improves adsorption efficiency, and reduces the overall volume, unlike traditional oxygen molecular sieves. It utilizes spiral technology to enhance the separation efficiency of oxygen and nitrogen in natural air, accelerates the separation speed of oxygen molecules, and avoids energy waste.

[0070] The ventilator of this invention may include a frame for mounting and supporting various components. A humidification bottle 5 is disposed between the air intake port and the oxygen concentration sensor 39. The oxygen concentration sensor 39 is mounted via an oxygen concentration sensor ventilation base 27. The humidification bottle 5 includes a ventilation cap 3 and an oxygen inhalation tube 4. The oxygen inhalation tube 4 is provided with an oxygen inhalation tube interface 58, which extends beyond the housing 46 and is also provided with a quick connector 28 to connect to various pipelines. The humidification bottle 5 is connected to the oxygen concentration sensor 39 via a humidification bottle air intake passage 40, and the humidification bottle 5 is connected to a second two-position three-way solenoid valve 41 via a second pure oxygen inhalation connection pipe 45. The top of the humidification bottle 5 is connected to the frame via a universal joint 2, and a counterweight 57 is disposed at the bottom of the humidification bottle 5. Through the cooperation of the counterweight 57 and the universal joint 2, the humidification bottle 5 can always be kept in a vertical position, preventing liquid water in the humidification bottle 5 from flowing back and affecting breathing, adapting to changes in movement status, that is, ensuring normal breathing in different postures of the individual.

[0071] The frame is encased in a shell 46, inside which the air purifier 6, oxygen generator, oxygen cylinder 12, and oxygen concentration adjustment mixing tank 10 are all installed. The shell 46 consists of an outer layer of cowhide and an inner layer of canvas. An electric heating device 1 is installed on the inner side of the canvas. The electric heating device 1 includes a spirally wound heat-insulating heating wire 47. Heating is achieved through the heat-insulating heating wire 47, which can maintain the internal environment of the shell 46 at a suitable operating temperature, for example, controlled at 10°C. A suitable temperature can ensure the normal operation of the battery pack 15 and electronic components in cold regions.

[0072] The system includes a battery pack 15 for powering various electrical devices. The battery pack 15 can operate at 4.8V and is connected to an external charging port 52 and a solar charging port 53. The switch is located inside the housing 46; to use it, simply open the cover 48. The housing 46 also includes an alarm indicator light 54, a display panel 55, etc., and an alarm buzzer 56 inside. The external charging port 52 allows connection to an external power source to charge the battery pack 15, while the solar charging port 53 allows charging with a solar panel. This ensures that soldiers can use the ventilator of this invention for extended periods during daily training, significantly improving their combat capabilities in high-altitude areas.

[0073] like Figures 17-18 As shown, the frame includes a humidifier bottle mounting bracket 59, a cooler mounting bracket 60, an air filter mounting sleeve 61, a reciprocating diaphragm press clamp 62, an oxygen-nitrogen separator base 63, an oxygen-nitrogen separator clamp 64, a flow meter clamp 65, a battery pack clamp 66, a second two-position three-way solenoid valve mounting bracket 67, and an oxygen cylinder mounting bracket 68, etc., which facilitates the installation and fixing of each component.

[0074] The oxygen cylinder 12 can be made of carbon fiber, which reduces its weight and improves its portability. It also reduces thermal conductivity, preventing oxygen temperature from affecting respiration in cold regions. The battery pack 15 uses lithium titanate batteries, avoiding the flammability of lithium batteries, while significantly improving stability and lifespan. The remaining materials are lightweight, further reducing the overall weight of the ventilator. The estimated total weight of the ventilator can be controlled to 3.5 kg, making it easy for individuals to carry.

[0075] The present invention also provides an oxygen supply method applicable to an air respirator as described above, comprising the following:

[0076] Start the compressor to draw air into the air breathing machine from the outside. After the air is filtered by the air purifier 6, it is pressurized by the compressor. The pressurized air is divided into two paths through the first three-way pipe 31. One path enters the oxygen concentration adjustment mixing tank 10 for oxygen concentration adjustment, and the other path enters the oxygen generator.

[0077] The oxygen separated from the oxygen generator enters the oxygen concentration adjustment mixing tank 10 after the flow rate is adjusted by the first flow meter 34.

[0078] If the oxygen concentration in the oxygen concentration adjusting mixing tank 10 does not reach the oxygen concentration in the natural air, the second flow meter 43 is controlled to supplement a certain amount of pure oxygen from the oxygen cylinder 12 into the oxygen concentration adjusting mixing tank 10.

[0079] Once the oxygen concentration is adjusted to the appropriate level, the oxygen is drawn into the air by the user through the oxygen concentration sensor 39 from the outlet of the oxygen concentration adjustment mixing tank 10.

[0080] The operation process of this embodiment of the invention is as follows:

[0081] After the equipment is turned on, the reciprocating diaphragm compressor 7 starts, drawing air from the outside into the system. The air is filtered through the desiccant tank 49, activated carbon tank 50, and filter membrane dust canister 51 in the air purifier 6 before entering the reciprocating diaphragm compressor 7 for pressurization. The pressurized air then enters the cooler 22 for cooling. The air exiting the cooler 22 is split into two paths via the first three-way pipe 31. One path passes through the first two-position three-way solenoid valve 29, which determines whether the air is toxic and selects either a non-toxic air path or a toxic filtration path to enter the oxygen concentration adjustment mixing tank 10 for oxygen concentration adjustment. If the air is non-toxic, it enters the oxygen concentration adjustment mixing tank through the non-toxic air path; if toxic, the toxic filtration path can be opened via a control switch to enter the toxic gas filter tank 11 for filtration. The other path passes through the two-position five-way solenoid valve 24 to enter the left tank 8 of the oxygen-nitrogen separator for oxygen separation, and the separated nitrogen is discharged from the right tank 9 of the oxygen-nitrogen separator. Oxygen separated from the left tank 8 of the oxygen-nitrogen separator is fed into the oxygen concentration adjusting mixing tank 10 by the first flow meter 34 to participate in oxygen concentration adjustment (the left tank 8 and the right tank 9 of the oxygen-nitrogen separator switch according to the adsorption state). If the oxygen concentration in the oxygen concentration adjusting mixing tank 10 does not reach 21%, the second flow meter 43 can be controlled to supplement a certain amount of pure oxygen into the oxygen concentration adjusting mixing tank 10. When the oxygen concentration is adjusted to be qualified, the adjusted air enters the humidification bottle 5 from the oxygen concentration adjusting mixing tank 10 through the oxygen concentration sensor 39. After being humidified by the humidification bottle 5, it is absorbed by the user through the oxygen inhalation tube 4.

[0082] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. An air respirator, characterized in that: The system includes an air purifier, an oxygen generator, an oxygen cylinder, and an oxygen concentration adjustment mixing tank. The air purifier is connected to one port of a first three-way pipe via a compressor. The other two ports of the first three-way pipe are respectively connected to the oxygen generator and the oxygen concentration adjustment mixing tank. The oxygen generator produces oxygen using air filtered by the air purifier. The outlet of the oxygen generator is connected to the oxygen concentration adjustment mixing tank via a first flow meter. The oxygen cylinder is connected to the oxygen concentration adjustment mixing tank via a second flow meter. The outlet of the oxygen concentration adjustment mixing tank is connected to an air intake port via an oxygen concentration sensor. The first flow meter, the second flow meter, and the oxygen concentration sensor are electrically connected to a controller. The oxygen concentration discharged from the air intake port is equivalent to the oxygen concentration in natural air. The oxygen generator includes a second three-way pipe and two oxygen-nitrogen separators. Each oxygen-nitrogen separator has an inlet and an outlet. The inlet is used for air intake during the oxygen generation stage and for waste gas outlet during the backflushing stage. The outlet is used for oxygen outlet during the oxygen generation stage and for oxygen intake during the backflushing stage. The two outlets are respectively connected to two ports of the second three-way pipe, and the other port of the second three-way pipe is connected to the first flow meter. The generator also includes a two-position five-way solenoid valve, which includes two oxygen generation passages and a second oxygen generation passage with opposite circuits. In the first oxygen generation passage, the two inlets are respectively connected to the first three-way pipe and the first waste gas outlet. In the second oxygen generation passage, the two inlets are respectively connected to the second waste gas outlet and the first three-way pipe. During the oxygen production process of one of the oxygen-nitrogen separators, a portion of the oxygen enters through the oxygen outlet of the right tank of another oxygen-nitrogen separator to backflush the oxygen-nitrogen separator in the desorption state, while the other portion of the oxygen is directed to the first flow meter. The oxygen-nitrogen separator adopts a spiral structure, which forms a spiral partition for airflow. The center opening of the spiral partition serves as the oxygen outlet, and the outer diameter tangential opening of the spiral partition serves as the inlet. A first two-position three-way solenoid valve is provided between the first three-way pipe and the oxygen concentration adjustment mixing tank. The first two-position three-way solenoid valve includes a non-toxic air passage and a toxic filtration passage. The non-toxic air passage is connected to the oxygen concentration adjustment mixing tank, and the toxic filtration passage is connected to the oxygen concentration adjustment mixing tank through a toxic filter canister.

2. The air respirator according to claim 1, characterized in that: The air purifier includes a desiccant tank, an activated carbon tank, and a filter membrane dustproof tank arranged in sequence according to the airflow order; the compressor is a reciprocating diaphragm compressor, and a cooler is provided between the reciprocating diaphragm compressor and the first three-way pipe.

3. The air respirator according to claim 1, characterized in that: The oxygen cylinder is connected to a second two-position three-way solenoid valve via a pressure reducing valve. The second two-position three-way solenoid valve includes a direct oxygen supply path and an oxygen concentration adjustment path. The direct oxygen supply path is connected to the air intake port, and the oxygen concentration adjustment path is connected to the second flow meter.

4. The air respirator according to any one of claims 1-3, characterized in that: The device includes a frame, and a humidification bottle is disposed between the air intake and the oxygen concentration sensor. The top of the humidification bottle is connected to the frame via a universal joint, and a counterweight is disposed at the bottom of the humidification bottle to keep the humidification bottle in a vertical position.

5. The air respirator according to claim 4, characterized in that: The frame is covered by a shell, which includes an outer layer of cowhide and an inner layer of canvas. An electric heating device is provided on the inside of the canvas to maintain the environment inside the shell at a suitable working temperature. The air purifier, the oxygen generator, the oxygen cylinder, and the oxygen concentration adjustment mixing tank are all installed inside the shell.

6. The air respirator according to claim 1, characterized in that: It includes a battery pack for supplying power to various electrical devices, the battery pack being connected to an external charging port and a solar charging port; the oxygen cylinder is made of carbon fiber, the battery pack uses lithium titanate batteries, and the remaining materials are made of lightweight materials.

7. The air respirator according to claim 1, characterized in that, The usage process includes the following: Start the compressor to draw air into the air breathing machine from the outside. After the air is filtered by the air purifier, it is pressurized by the compressor. The pressurized air is divided into two paths through the first three-way pipe. One path enters the oxygen concentration adjustment mixing tank for oxygen concentration adjustment, and the other path enters the oxygen generator. The oxygen separated from the oxygen generator enters the oxygen concentration adjustment mixing tank after the flow rate is adjusted by the first flow meter to participate in the oxygen concentration adjustment; If the oxygen concentration in the oxygen concentration adjusting mixing tank does not reach the oxygen concentration in natural air, the second flow meter is controlled to supplement a certain amount of pure oxygen from the oxygen cylinder into the oxygen concentration adjusting mixing tank. Once the oxygen concentration is adjusted to the appropriate level, the oxygen is drawn into the air by the user through the air intake port after passing through the oxygen concentration sensor from the outlet of the oxygen concentration adjustment mixing tank.

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